path: root/target/linux/etrax/patches/cris/003-drivers-cris.patch

diff -urN linux-2.6.19.2.orig/drivers/ide/cris/ide-cris.c linux-2.6.19.2.dev/drivers/ide/cris/ide-cris.c
--- linux-2.6.19.2.orig/drivers/ide/cris/ide-cris.c	2007-01-10 20:10:37.000000000 +0100
+++ linux-2.6.19.2.dev/drivers/ide/cris/ide-cris.c	2006-12-06 14:17:02.000000000 +0100
@@ -1,8 +1,8 @@
-/* $Id: cris-ide-driver.patch,v 1.1 2005/06/29 21:39:07 akpm Exp $
+/* $Id: ide-cris.c,v 1.10 2006/12/06 13:17:02 starvik Exp $
  *
  * Etrax specific IDE functions, like init and PIO-mode setting etc.
  * Almost the entire ide.c is used for the rest of the Etrax ATA driver.
- * Copyright (c) 2000-2005 Axis Communications AB
+ * Copyright (c) 2000-2006 Axis Communications AB
  *
  * Authors:    Bjorn Wesen        (initial version)
  *             Mikael Starvik     (crisv32 port)
@@ -43,8 +43,8 @@
 
 #define IDE_REGISTER_TIMEOUT 300
 
-#define LOWDB(x)
-#define D(x)
+#define LOWDB(x) 
+#define D(x) 
 
 enum /* Transfer types */
 {
@@ -88,12 +88,50 @@
 #define ATA_PIO0_STROBE 39
 #define ATA_PIO0_HOLD    9
 
-int
+/*
+ * On ETRAX FS, an interrupt remains latched and active until ack:ed.
+ * Further, ATA acks are without effect as long as INTRQ is asserted, as the
+ * corresponding ATA interrupt is continuously set to active.  There will be a
+ * clearing ack at the usual cris_ide_ack_intr call, but that serves just to
+ * gracefully handle an actual spurious interrupt or similar situation (which
+ * will cause an early return without further actions, see the ide_intr
+ * function).
+ *
+ * However, the normal case at time of this writing is that nothing has
+ * changed from when INTRQ was asserted until the cris_ide_ack_intr call; no
+ * ATA registers written and no status register read, so INTRQ will *remain*
+ * asserted, thus *another* interrupt will be latched, and will be seen as a
+ * spurious interrupt after the "real" interrupt is serviced.  With lots of
+ * ATA traffic (as in a trivial file-copy between two drives), this will trig
+ * the condition desc->irqs_unhandled > 99900 in
+ * kernel/irq/spurious.c:note_interrupt and the system will halt.
+ *
+ * To actually get rid of the interrupt corresponding to the current INTRQ
+ * assertion, we make a second ack after the next ATA register read or write;
+ * i.e. when INTRQ must be deasserted.  At that time, we don't have the hwif
+ * pointer available, so we need to stash a local copy (safe, because it'll be
+ * set and cleared within the same spin_lock_irqsave region).  The pointer
+ * serves doubly as a boolean flag that an ack is needed.  The caller must
+ * NULL the pointer after the "second ack".
+ */
+
+static ide_hwif_t *hwif_to_ack;
+
+static int
 cris_ide_ack_intr(ide_hwif_t* hwif)
 {
-	reg_ata_rw_ctrl2 ctrl2 = REG_TYPE_CONV(reg_ata_rw_ctrl2,
+	/*
+	 * The interrupt is shared so we need to find the interface bit number
+	 * to ack.  We define the ATA I/O register addresses to have the
+	 * format of ata rw_ctrl2 register contents, conveniently holding this
+	 * number.
+	 */
+	reg_ata_rw_ctrl2 ctrl2 = REG_TYPE_CONV(reg_ata_rw_ctrl2, 
 	                         int, hwif->io_ports[0]);
 	REG_WR_INT(ata, regi_ata, rw_ack_intr, 1 << ctrl2.sel);
+
+	/* Prepare to ack again, see above. */
+	hwif_to_ack = hwif;
 	return 1;
 }
 
@@ -122,8 +160,24 @@
 
 static void
 cris_ide_write_command(unsigned long command)
-{
+{	
 	REG_WR_INT(ata, regi_ata, rw_ctrl2, command); /* write data to the drive's register */
+
+	/*
+	 * Perform a pending ack if needed; see hwif_ack definition.  Perhaps
+	 * we should check closer that this call is really a part of the
+	 * preparation to read the ATA status register or write to the ATA
+	 * command register (causing deassert of INTRQ; see the ATA standard),
+	 * but at time of this writing (and expected to sanely remain so), the
+	 * first ATA register activity after an cris_ide_ack_intr call is
+	 * certain to do exactly that.
+	 */
+	if (hwif_to_ack) {
+		/* The drive may take this long to deassert INTRQ. */
+		ndelay(400);
+		cris_ide_ack_intr(hwif_to_ack);
+		hwif_to_ack = NULL;
+	}
 }
 
 static void
@@ -160,8 +214,8 @@
 {
 	reg_ata_rw_ctrl2 ctrl2 = {0};
 	ctrl2.addr = addr;
-	ctrl2.cs1 = cs1;
-	ctrl2.cs0 = cs0;
+	ctrl2.cs1 = !cs1;
+	ctrl2.cs0 = !cs0;
 	return REG_TYPE_CONV(int, reg_ata_rw_ctrl2, ctrl2);
 }
 
@@ -184,14 +238,14 @@
 
 	intr_mask.bus0 = regk_ata_yes;
 	intr_mask.bus1 = regk_ata_yes;
-	intr_mask.bus2 = regk_ata_yes;
+	intr_mask.bus2 = regk_ata_yes;		
 	intr_mask.bus3 = regk_ata_yes;
 
 	REG_WR(ata, regi_ata, rw_intr_mask, intr_mask);
 
 	crisv32_request_dma(2, "ETRAX FS built-in ATA", DMA_VERBOSE_ON_ERROR, 0, dma_ata);
 	crisv32_request_dma(3, "ETRAX FS built-in ATA", DMA_VERBOSE_ON_ERROR, 0, dma_ata);
-
+        
 	crisv32_pinmux_alloc_fixed(pinmux_ata);
 	crisv32_pinmux_alloc_fixed(pinmux_ata0);
 	crisv32_pinmux_alloc_fixed(pinmux_ata1);
@@ -204,14 +258,15 @@
 	DMA_ENABLE(regi_dma3);
 
 	DMA_WR_CMD (regi_dma2, regk_dma_set_w_size2);
-	DMA_WR_CMD (regi_dma3, regk_dma_set_w_size2);
+	DMA_WR_CMD (regi_dma3, regk_dma_set_w_size2);	
 }
 
 static dma_descr_context mycontext __attribute__ ((__aligned__(32)));
 
 #define cris_dma_descr_type dma_descr_data
-#define cris_pio_read regk_ata_rd
-#define cris_ultra_mask 0x7
+#define cris_pio_read (regk_ata_rd << 24)
+#define cris_ultra_mask 0x0 /* 0x7 for UDMA */
+#define IRQ ATA_INTR_VECT
 #define MAX_DESCR_SIZE 0xffffffffUL
 
 static unsigned long
@@ -226,6 +281,8 @@
 	d->buf = (char*)virt_to_phys(buf);
 	d->after = d->buf + len;
 	d->eol = last;
+	/* assume descriptors are consecutively placed in memory */
+	d->next = last ? 0 : (cris_dma_descr_type*)virt_to_phys(d+1);
 }
 
 static void
@@ -237,8 +294,10 @@
 	mycontext.saved_data = (dma_descr_data*)virt_to_phys(d);
 	mycontext.saved_data_buf = d->buf;
 	/* start the dma channel */
+	if (dir)
+		flush_dma_context(&mycontext); // Cache bug workaround   
 	DMA_START_CONTEXT(dir ? regi_dma3 : regi_dma2, virt_to_phys(&mycontext));
-
+	
 	/* initiate a multi word dma read using PIO handshaking */
 	trf_cnt.cnt = len >> 1;
 	/* Due to a "feature" the transfer count has to be one extra word for UDMA. */
@@ -248,7 +307,7 @@
 
 	ctrl2.rw = dir ? regk_ata_rd : regk_ata_wr;
 	ctrl2.trf_mode = regk_ata_dma;
-	ctrl2.hsh = type == TYPE_PIO ? regk_ata_pio :
+	ctrl2.hsh = type == TYPE_PIO ? regk_ata_pio : 
 	            type == TYPE_DMA ? regk_ata_dma : regk_ata_udma;
 	ctrl2.multi = regk_ata_yes;
 	ctrl2.dma_size = regk_ata_word;
@@ -339,7 +398,7 @@
 #define ATA_PIO0_STROBE 19
 #define ATA_PIO0_HOLD    4
 
-int
+int 
 cris_ide_ack_intr(ide_hwif_t* hwif)
 {
 	return 1;
@@ -348,13 +407,13 @@
 static inline int
 cris_ide_busy(void)
 {
-	return *R_ATA_STATUS_DATA & IO_MASK(R_ATA_STATUS_DATA, busy) ;
+	return *R_ATA_STATUS_DATA & IO_MASK(R_ATA_STATUS_DATA, busy) ; 
 }
 
 static inline int
 cris_ide_ready(void)
 {
-	return *R_ATA_STATUS_DATA & IO_MASK(R_ATA_STATUS_DATA, tr_rdy) ;
+	return *R_ATA_STATUS_DATA & IO_MASK(R_ATA_STATUS_DATA, tr_rdy) ; 
 }
 
 static inline int
@@ -364,12 +423,12 @@
 	*data = (unsigned short)status;
 	return status & IO_MASK(R_ATA_STATUS_DATA, dav);
 }
-
+	
 static void
 cris_ide_write_command(unsigned long command)
 {
-	*R_ATA_CTRL_DATA = command;
-}
+	*R_ATA_CTRL_DATA = command; 
+}		
 
 static void
 cris_ide_set_speed(int type, int setup, int strobe, int hold)
@@ -406,8 +465,8 @@
 cris_ide_reg_addr(unsigned long addr, int cs0, int cs1)
 {
 	return IO_FIELD(R_ATA_CTRL_DATA, addr, addr) |
-	       IO_FIELD(R_ATA_CTRL_DATA, cs0, cs0) |
-	       IO_FIELD(R_ATA_CTRL_DATA, cs1, cs1);
+	       IO_FIELD(R_ATA_CTRL_DATA, cs0, cs0 ? 0 : 1) |
+	       IO_FIELD(R_ATA_CTRL_DATA, cs1, cs1 ? 0 : 1);
 }
 
 static __init void
@@ -484,6 +543,7 @@
 #define cris_dma_descr_type etrax_dma_descr
 #define cris_pio_read IO_STATE(R_ATA_CTRL_DATA, rw, read)
 #define cris_ultra_mask 0x0
+#define IRQ 4
 #define MAX_DESCR_SIZE 0x10000UL
 
 static unsigned long
@@ -497,8 +557,8 @@
 {
 	d->buf = virt_to_phys(buf);
 	d->sw_len = len == MAX_DESCR_SIZE ? 0 : len;
-	if (last)
-		d->ctrl |= d_eol;
+	d->ctrl = last ? d_eol : 0;
+	d->next = last ? 0 : virt_to_phys(d+1); /* assumes descr's in array */
 }
 
 static void cris_ide_start_dma(ide_drive_t *drive, cris_dma_descr_type *d, int dir, int type, int len)
@@ -521,14 +581,14 @@
 		*R_DMA_CH2_FIRST = virt_to_phys(d);
 		*R_DMA_CH2_CMD   = IO_STATE(R_DMA_CH2_CMD, cmd, start);
 	}
-
+	
 	/* initiate a multi word dma read using DMA handshaking */
 
 	*R_ATA_TRANSFER_CNT =
 		IO_FIELD(R_ATA_TRANSFER_CNT, count, len >> 1);
 
 	cmd = dir ? IO_STATE(R_ATA_CTRL_DATA, rw, read) : IO_STATE(R_ATA_CTRL_DATA, rw, write);
-	cmd |= type == TYPE_PIO ? IO_STATE(R_ATA_CTRL_DATA, handsh, pio) :
+	cmd |= type == TYPE_PIO ? IO_STATE(R_ATA_CTRL_DATA, handsh, pio) : 
 	                          IO_STATE(R_ATA_CTRL_DATA, handsh, dma);
 	*R_ATA_CTRL_DATA =
 		cmd |
@@ -570,7 +630,7 @@
 }
 
 #endif
-
+		
 void
 cris_ide_outw(unsigned short data, unsigned long reg) {
 	int timeleft;
@@ -597,7 +657,7 @@
 	if(!timeleft)
 		printk("ATA timeout reg 0x%lx := 0x%x\n", reg, data);
 
-	cris_ide_write_command(reg|data); /* write data to the drive's register */
+	cris_ide_write_command(reg|data); /* write data to the drive's register */ 
 
 	timeleft = IDE_REGISTER_TIMEOUT;
 	/* wait for transmitter ready */
@@ -684,13 +744,15 @@
 static void cris_atapi_output_bytes(ide_drive_t *drive, void *, unsigned int);
 static int cris_dma_off (ide_drive_t *drive);
 static int cris_dma_on (ide_drive_t *drive);
+static int cris_dma_host_off (ide_drive_t *drive);
+static int cris_dma_host_on (ide_drive_t *drive);
 
 static void tune_cris_ide(ide_drive_t *drive, u8 pio)
 {
 	int setup, strobe, hold;
 
 	switch(pio)
-	{
+	{	
 		case 0:
 			setup = ATA_PIO0_SETUP;
 			strobe = ATA_PIO0_STROBE;
@@ -715,7 +777,7 @@
 			setup = ATA_PIO4_SETUP;
 			strobe = ATA_PIO4_STROBE;
 			hold = ATA_PIO4_HOLD;
-			break;
+			break;    
 		default:
 			return;
 	}
@@ -733,7 +795,7 @@
 	}
 
 	switch(speed)
-	{
+	{	
 		case XFER_UDMA_0:
 			cyc = ATA_UDMA0_CYC;
 			dvs = ATA_UDMA0_DVS;
@@ -765,7 +827,7 @@
 	if (speed >= XFER_UDMA_0)
 		cris_ide_set_speed(TYPE_UDMA, cyc, dvs, 0);
 	else
-		cris_ide_set_speed(TYPE_DMA, 0, strobe, hold);
+		cris_ide_set_speed(TYPE_DMA, 0, strobe, hold);	
 
 	return 0;
 }
@@ -790,11 +852,13 @@
 
 	for(h = 0; h < MAX_HWIFS; h++) {
 		ide_hwif_t *hwif = &ide_hwifs[h];
-		ide_setup_ports(&hw, cris_ide_base_address(h),
+		memset(&hw, 0, sizeof(hw));
+		ide_setup_ports(&hw, cris_ide_base_address(h), 
 		                ide_offsets,
 		                0, 0, cris_ide_ack_intr,
-		                ide_default_irq(0));
+		                IRQ);
 		ide_register_hw(&hw, &hwif);
+		hwif->irq = IRQ;
 		hwif->mmio = 2;
 		hwif->chipset = ide_etrax100;
 		hwif->tuneproc = &tune_cris_ide;
@@ -814,13 +878,15 @@
 		hwif->OUTBSYNC = &cris_ide_outbsync;
 		hwif->INB = &cris_ide_inb;
 		hwif->INW = &cris_ide_inw;
-		hwif->ide_dma_host_off = &cris_dma_off;
-		hwif->ide_dma_host_on = &cris_dma_on;
+		hwif->ide_dma_host_off = &cris_dma_host_off;
+		hwif->ide_dma_host_on = &cris_dma_host_on;
 		hwif->ide_dma_off_quietly = &cris_dma_off;
+		hwif->ide_dma_on = &cris_dma_on;
 		hwif->udma_four = 0;
 		hwif->ultra_mask = cris_ultra_mask;
 		hwif->mwdma_mask = 0x07; /* Multiword DMA 0-2 */
 		hwif->swdma_mask = 0x07; /* Singleword DMA 0-2 */
+		hwif->rqsize = 256;
 	}
 
 	/* Reset pulse */
@@ -835,13 +901,25 @@
 	cris_ide_set_speed(TYPE_UDMA, ATA_UDMA2_CYC, ATA_UDMA2_DVS, 0);
 }
 
+static int cris_dma_host_off (ide_drive_t *drive)
+{
+	return 0;
+}
+
+static int cris_dma_host_on (ide_drive_t *drive)
+{
+	return 0;
+}
+
 static int cris_dma_off (ide_drive_t *drive)
 {
+	drive->using_dma = 0;
 	return 0;
 }
 
 static int cris_dma_on (ide_drive_t *drive)
 {
+	drive->using_dma = 1;
 	return 0;
 }
 
@@ -958,30 +1036,28 @@
 			size += sg_dma_len(sg);
 		}
 
-		/* did we run out of descriptors? */
-
-		if(count >= MAX_DMA_DESCRS) {
-			printk("%s: too few DMA descriptors\n", drive->name);
-			return 1;
-		}
-
-		/* however, this case is more difficult - rw_trf_cnt cannot be more
-		   than 65536 words per transfer, so in that case we need to either
+		/* rw_trf_cnt cannot be more than 131072 words per transfer, 
+		   (- 1 word for UDMA CRC) so in that case we need to either:
 		   1) use a DMA interrupt to re-trigger rw_trf_cnt and continue with
 		      the descriptors, or
 		   2) simply do the request here, and get dma_intr to only ide_end_request on
 		      those blocks that were actually set-up for transfer.
+		      (The ide framework will issue a new request for the remainder)
 		*/
 
-		if(ata_tot_size + size > 131072) {
+		if(ata_tot_size + size > 262140) {
 			printk("too large total ATA DMA request, %d + %d!\n", ata_tot_size, (int)size);
 			return 1;
 		}
 
-		/* If size > MAX_DESCR_SIZE it has to be splitted into new descriptors. Since we
-                   don't handle size > 131072 only one split is necessary */
+		/* If size > MAX_DESCR_SIZE it has to be splitted into new descriptors. */
 
-		if(size > MAX_DESCR_SIZE) {
+		while (size > MAX_DESCR_SIZE) {
+			/* did we run out of descriptors? */
+			if(count >= MAX_DMA_DESCRS) {
+				printk("%s: too few DMA descriptors\n", drive->name);
+				return 1;
+			}
 			cris_ide_fill_descriptor(&ata_descrs[count], (void*)addr, MAX_DESCR_SIZE, 0);
 			count++;
 			ata_tot_size += MAX_DESCR_SIZE;
@@ -989,6 +1065,11 @@
 			addr += MAX_DESCR_SIZE;
 		}
 
+		/* did we run out of descriptors? */
+		if(count >= MAX_DMA_DESCRS) {
+			printk("%s: too few DMA descriptors\n", drive->name);
+			return 1;
+		}
 		cris_ide_fill_descriptor(&ata_descrs[count], (void*)addr, size,i ? 0 : 1);
 		count++;
 		ata_tot_size += size;
@@ -1050,8 +1131,12 @@
 
 	if (id && (id->capability & 1)) {
 		if (ide_use_dma(drive)) {
-			if (cris_config_drive_for_dma(drive))
-				return hwif->ide_dma_on(drive);
+			if (cris_config_drive_for_dma(drive)) {
+				if (hwif->ide_dma_on)
+					return hwif->ide_dma_on(drive);
+				else
+					return 1;
+			}
 		}
 	}
 
--- linux-2.6.19.2.orig/drivers/serial/crisv10.c	2007-01-10 20:10:37.000000000 +0100
+++ linux-2.6.19.2.dev/drivers/serial/crisv10.c	2007-01-09 10:30:54.000000000 +0100
@@ -2,7 +2,7 @@
  *
  * Serial port driver for the ETRAX 100LX chip
  *
- *    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003  Axis Communications AB
+ *    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004  Axis Communications AB
  *
  *    Many, many authors. Based once upon a time on serial.c for 16x50.
  *
@@ -445,6 +445,7 @@
 
 #include <asm/io.h>
 #include <asm/irq.h>
+#include <asm/dma.h>
 #include <asm/system.h>
 #include <asm/bitops.h>
 #include <linux/delay.h>
@@ -454,8 +455,9 @@
 /* non-arch dependent serial structures are in linux/serial.h */
 #include <linux/serial.h>
 /* while we keep our own stuff (struct e100_serial) in a local .h file */
-#include "serial.h"
+#include "crisv10.h"
 #include <asm/fasttimer.h>
+#include <asm/arch/io_interface_mux.h>
 
 #ifdef CONFIG_ETRAX_SERIAL_FAST_TIMER
 #ifndef CONFIG_ETRAX_FAST_TIMER
@@ -586,11 +588,10 @@
 static void change_speed(struct e100_serial *info);
 static void rs_throttle(struct tty_struct * tty);
 static void rs_wait_until_sent(struct tty_struct *tty, int timeout);
-static int rs_write(struct tty_struct * tty, int from_user,
+static int rs_write(struct tty_struct * tty,
                     const unsigned char *buf, int count);
 #ifdef CONFIG_ETRAX_RS485
-static int e100_write_rs485(struct tty_struct * tty, int from_user,
-                            const unsigned char *buf, int count);
+static int e100_write_rs485(struct tty_struct * tty, const unsigned char *buf, int count);
 #endif
 static int get_lsr_info(struct e100_serial * info, unsigned int *value);
 
@@ -677,20 +678,39 @@
 	  .rx_ctrl     = DEF_RX,
 	  .tx_ctrl     = DEF_TX,
 	  .iseteop     = 2,
+	  .dma_owner   = dma_ser0,
+	  .io_if       = if_serial_0,
 #ifdef CONFIG_ETRAX_SERIAL_PORT0
           .enabled  = 1,
 #ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA6_OUT
 	  .dma_out_enabled = 1,
+	  .dma_out_nbr = SER0_TX_DMA_NBR,
+	  .dma_out_irq_nbr = SER0_DMA_TX_IRQ_NBR,
+	  .dma_out_irq_flags = IRQF_DISABLED,
+	  .dma_out_irq_description = "serial 0 dma tr",
 #else
 	  .dma_out_enabled = 0,
+	  .dma_out_nbr = UINT_MAX,
+	  .dma_out_irq_nbr = 0,
+	  .dma_out_irq_flags = 0,
+	  .dma_out_irq_description = NULL,
 #endif
 #ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA7_IN
 	  .dma_in_enabled = 1,
+	  .dma_in_nbr = SER0_RX_DMA_NBR,
+	  .dma_in_irq_nbr = SER0_DMA_RX_IRQ_NBR,
+	  .dma_in_irq_flags = IRQF_DISABLED,
+	  .dma_in_irq_description = "serial 0 dma rec",
 #else
-	  .dma_in_enabled = 0
+	  .dma_in_enabled = 0,
+	  .dma_in_nbr = UINT_MAX,
+	  .dma_in_irq_nbr = 0,
+	  .dma_in_irq_flags = 0,
+	  .dma_in_irq_description = NULL,
 #endif
 #else
           .enabled  = 0,
+	  .io_if_description = NULL,
 	  .dma_out_enabled = 0,
 	  .dma_in_enabled = 0
 #endif
@@ -712,20 +732,42 @@
 	  .rx_ctrl     = DEF_RX,
 	  .tx_ctrl     = DEF_TX,
 	  .iseteop     = 3,
+	  .dma_owner   = dma_ser1,
+	  .io_if       = if_serial_1,
 #ifdef CONFIG_ETRAX_SERIAL_PORT1
           .enabled  = 1,
+	  .io_if_description = "ser1",
 #ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA8_OUT
 	  .dma_out_enabled = 1,
+	  .dma_out_nbr = SER1_TX_DMA_NBR,
+	  .dma_out_irq_nbr = SER1_DMA_TX_IRQ_NBR,
+	  .dma_out_irq_flags = IRQF_DISABLED,
+	  .dma_out_irq_description = "serial 1 dma tr",
 #else
 	  .dma_out_enabled = 0,
+	  .dma_out_nbr = UINT_MAX,
+	  .dma_out_irq_nbr = 0,
+	  .dma_out_irq_flags = 0,
+	  .dma_out_irq_description = NULL,
 #endif
 #ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA9_IN
 	  .dma_in_enabled = 1,
+	  .dma_in_nbr = SER1_RX_DMA_NBR,
+	  .dma_in_irq_nbr = SER1_DMA_RX_IRQ_NBR,
+	  .dma_in_irq_flags = IRQF_DISABLED,
+	  .dma_in_irq_description = "serial 1 dma rec",
 #else
-	  .dma_in_enabled = 0
+	  .dma_in_enabled = 0,
+	  .dma_in_enabled = 0,
+	  .dma_in_nbr = UINT_MAX,
+	  .dma_in_irq_nbr = 0,
+	  .dma_in_irq_flags = 0,
+	  .dma_in_irq_description = NULL,
 #endif
 #else
           .enabled  = 0,
+	  .io_if_description = NULL,
+	  .dma_in_irq_nbr = 0,
 	  .dma_out_enabled = 0,
 	  .dma_in_enabled = 0
 #endif
@@ -746,20 +788,40 @@
 	  .rx_ctrl     = DEF_RX,
 	  .tx_ctrl     = DEF_TX,
 	  .iseteop     = 0,
+	  .dma_owner   = dma_ser2,
+	  .io_if       = if_serial_2,
 #ifdef CONFIG_ETRAX_SERIAL_PORT2
           .enabled  = 1,
+	  .io_if_description = "ser2",
 #ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA2_OUT
 	  .dma_out_enabled = 1,
+	  .dma_out_nbr = SER2_TX_DMA_NBR,
+	  .dma_out_irq_nbr = SER2_DMA_TX_IRQ_NBR,
+	  .dma_out_irq_flags = IRQF_DISABLED,
+	  .dma_out_irq_description = "serial 2 dma tr",
 #else
 	  .dma_out_enabled = 0,
+	  .dma_in_nbr = UINT_MAX,
+	  .dma_in_irq_nbr = 0,
+	  .dma_in_irq_flags = 0,
+	  .dma_in_irq_description = NULL,
 #endif
 #ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA3_IN
 	  .dma_in_enabled = 1,
+	  .dma_in_nbr = SER2_RX_DMA_NBR,
+	  .dma_in_irq_nbr = SER2_DMA_RX_IRQ_NBR,
+	  .dma_in_irq_flags = IRQF_DISABLED,
+	  .dma_in_irq_description = "serial 2 dma rec",
 #else
-	  .dma_in_enabled = 0
+	  .dma_in_enabled = 0,
+	  .dma_in_nbr = UINT_MAX,
+	  .dma_in_irq_nbr = 0,
+	  .dma_in_irq_flags = 0,
+	  .dma_in_irq_description = NULL,
 #endif
 #else
           .enabled  = 0,
+	  .io_if_description = NULL,
 	  .dma_out_enabled = 0,
 	  .dma_in_enabled = 0
 #endif
@@ -780,20 +842,40 @@
 	  .rx_ctrl     = DEF_RX,
 	  .tx_ctrl     = DEF_TX,
 	  .iseteop     = 1,
+	  .dma_owner   = dma_ser3,
+	  .io_if       = if_serial_3,
 #ifdef CONFIG_ETRAX_SERIAL_PORT3
           .enabled  = 1,
+	  .io_if_description = "ser3",
 #ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA4_OUT
 	  .dma_out_enabled = 1,
+	  .dma_out_nbr = SER3_TX_DMA_NBR,
+	  .dma_out_irq_nbr = SER3_DMA_TX_IRQ_NBR,
+	  .dma_out_irq_flags = IRQF_DISABLED,
+	  .dma_out_irq_description = "serial 3 dma tr",
 #else
 	  .dma_out_enabled = 0,
+	  .dma_out_nbr = UINT_MAX,
+	  .dma_out_irq_nbr = 0,
+	  .dma_out_irq_flags = 0,
+	  .dma_out_irq_description = NULL,
 #endif
 #ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA5_IN
 	  .dma_in_enabled = 1,
+	  .dma_in_nbr = SER3_RX_DMA_NBR,
+	  .dma_in_irq_nbr = SER3_DMA_RX_IRQ_NBR,
+	  .dma_in_irq_flags = IRQF_DISABLED,
+	  .dma_in_irq_description = "serial 3 dma rec",
 #else
-	  .dma_in_enabled = 0
+	  .dma_in_enabled = 0,
+	  .dma_in_nbr = UINT_MAX,
+	  .dma_in_irq_nbr = 0,
+	  .dma_in_irq_flags = 0,
+	  .dma_in_irq_description = NULL
 #endif
 #else
           .enabled  = 0,
+	  .io_if_description = NULL,
 	  .dma_out_enabled = 0,
 	  .dma_in_enabled = 0
 #endif
@@ -1414,12 +1496,11 @@
 	{
 		unsigned long flags;
 
-		save_flags(flags);
-		cli();
+		local_irq_save(flags);
 		*e100_modem_pins[info->line].dtr_shadow &= ~mask;
 		*e100_modem_pins[info->line].dtr_shadow |= (set ? 0 : mask);
 		*e100_modem_pins[info->line].dtr_port = *e100_modem_pins[info->line].dtr_shadow;
-		restore_flags(flags);
+		local_irq_restore(flags);
 	}
 
 #ifdef SERIAL_DEBUG_IO
@@ -1438,12 +1519,11 @@
 {
 #ifndef CONFIG_SVINTO_SIM
 	unsigned long flags;
-	save_flags(flags);
-	cli();
+	local_irq_save(flags);
 	info->rx_ctrl &= ~E100_RTS_MASK;
 	info->rx_ctrl |= (set ? 0 : E100_RTS_MASK);  /* RTS is active low */
 	info->port[REG_REC_CTRL] = info->rx_ctrl;
-	restore_flags(flags);
+	local_irq_restore(flags);
 #ifdef SERIAL_DEBUG_IO
 	printk("ser%i rts %i\n", info->line, set);
 #endif
@@ -1461,12 +1541,11 @@
 		unsigned char mask = e100_modem_pins[info->line].ri_mask;
 		unsigned long flags;
 
-		save_flags(flags);
-		cli();
+		local_irq_save(flags);
 		*e100_modem_pins[info->line].ri_shadow &= ~mask;
 		*e100_modem_pins[info->line].ri_shadow |= (set ? 0 : mask);
 		*e100_modem_pins[info->line].ri_port = *e100_modem_pins[info->line].ri_shadow;
-		restore_flags(flags);
+		local_irq_restore(flags);
 	}
 #endif
 }
@@ -1479,12 +1558,11 @@
 		unsigned char mask = e100_modem_pins[info->line].cd_mask;
 		unsigned long flags;
 
-		save_flags(flags);
-		cli();
+		local_irq_save(flags);
 		*e100_modem_pins[info->line].cd_shadow &= ~mask;
 		*e100_modem_pins[info->line].cd_shadow |= (set ? 0 : mask);
 		*e100_modem_pins[info->line].cd_port = *e100_modem_pins[info->line].cd_shadow;
-		restore_flags(flags);
+		local_irq_restore(flags);
 	}
 #endif
 }
@@ -1558,8 +1636,7 @@
 	/* Disable output DMA channel for the serial port in question
 	 * ( set to something other then serialX)
 	 */
-	save_flags(flags);
-	cli();
+	local_irq_save(flags);
 	DFLOW(DEBUG_LOG(info->line, "disable_txdma_channel %i\n", info->line));
 	if (info->line == 0) {
 		if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma6)) ==
@@ -1587,7 +1664,7 @@
 		}
 	}
 	*R_GEN_CONFIG = genconfig_shadow;
-	restore_flags(flags);
+	local_irq_restore(flags);
 }
 
 
@@ -1595,8 +1672,7 @@
 {
 	unsigned long flags;
 
-	save_flags(flags);
-	cli();
+	local_irq_save(flags);
 	DFLOW(DEBUG_LOG(info->line, "enable_txdma_channel %i\n", info->line));
 	/* Enable output DMA channel for the serial port in question */
 	if (info->line == 0) {
@@ -1613,7 +1689,7 @@
 		genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma4, serial3);
 	}
 	*R_GEN_CONFIG = genconfig_shadow;
-	restore_flags(flags);
+	local_irq_restore(flags);
 }
 
 static void e100_disable_rxdma_channel(struct e100_serial *info)
@@ -1623,8 +1699,7 @@
 	/* Disable input DMA channel for the serial port in question
 	 * ( set to something other then serialX)
 	 */
-	save_flags(flags);
-	cli();
+	local_irq_save(flags);
 	if (info->line == 0) {
 		if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma7)) ==
 		    IO_STATE(R_GEN_CONFIG, dma7, serial0)) {
@@ -1651,7 +1726,7 @@
 		}
 	}
 	*R_GEN_CONFIG = genconfig_shadow;
-	restore_flags(flags);
+	local_irq_restore(flags);
 }
 
 
@@ -1659,8 +1734,7 @@
 {
 	unsigned long flags;
 
-	save_flags(flags);
-	cli();
+	local_irq_save(flags);
 	/* Enable input DMA channel for the serial port in question */
 	if (info->line == 0) {
 		genconfig_shadow &=  ~IO_MASK(R_GEN_CONFIG, dma7);
@@ -1676,7 +1750,7 @@
 		genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma5, serial3);
 	}
 	*R_GEN_CONFIG = genconfig_shadow;
-	restore_flags(flags);
+	local_irq_restore(flags);
 }
 
 #ifdef SERIAL_HANDLE_EARLY_ERRORS
@@ -1783,7 +1857,7 @@
 }
 
 static int
-e100_write_rs485(struct tty_struct *tty, int from_user,
+e100_write_rs485(struct tty_struct *tty,
                  const unsigned char *buf, int count)
 {
 	struct e100_serial * info = (struct e100_serial *)tty->driver_data;
@@ -1796,7 +1870,7 @@
 	 */
 	info->rs485.enabled = 1;
 	/* rs_write now deals with RS485 if enabled */
-	count = rs_write(tty, from_user, buf, count);
+	count = rs_write(tty, buf, count);
 	info->rs485.enabled = old_enabled;
 	return count;
 }
@@ -1834,7 +1908,7 @@
 		unsigned long flags;
 		unsigned long xoff;
 
-		save_flags(flags); cli();
+		local_irq_save(flags);
 		DFLOW(DEBUG_LOG(info->line, "XOFF rs_stop xmit %i\n",
 				CIRC_CNT(info->xmit.head,
 					 info->xmit.tail,SERIAL_XMIT_SIZE)));
@@ -1846,7 +1920,7 @@
 		}
 
 		*((unsigned long *)&info->port[REG_XOFF]) = xoff;
-		restore_flags(flags);
+		local_irq_restore(flags);
 	}
 }
 
@@ -1858,7 +1932,7 @@
 		unsigned long flags;
 		unsigned long xoff;
 
-		save_flags(flags); cli();
+		local_irq_save(flags);
 		DFLOW(DEBUG_LOG(info->line, "XOFF rs_start xmit %i\n",
 				CIRC_CNT(info->xmit.head,
 					 info->xmit.tail,SERIAL_XMIT_SIZE)));
@@ -1873,7 +1947,7 @@
 		    info->xmit.head != info->xmit.tail && info->xmit.buf)
 			e100_enable_serial_tx_ready_irq(info);
 
-		restore_flags(flags);
+		local_irq_restore(flags);
 	}
 }
 
@@ -2053,8 +2127,7 @@
 static void flush_timeout_function(unsigned long data);
 #define START_FLUSH_FAST_TIMER_TIME(info, string, usec) {\
   unsigned long timer_flags; \
-  save_flags(timer_flags); \
-  cli(); \
+  local_irq_save(timer_flags); \
   if (fast_timers[info->line].function == NULL) { \
     serial_fast_timer_started++; \
     TIMERD(DEBUG_LOG(info->line, "start_timer %i ", info->line)); \
@@ -2068,7 +2141,7 @@
   else { \
     TIMERD(DEBUG_LOG(info->line, "timer %i already running\n", info->line)); \
   } \
-  restore_flags(timer_flags); \
+  local_irq_restore(timer_flags); \
 }
 #define START_FLUSH_FAST_TIMER(info, string) START_FLUSH_FAST_TIMER_TIME(info, string, info->flush_time_usec)
 
@@ -2097,8 +2170,7 @@
 {
 	unsigned long flags;
 
-	save_flags(flags);
-	cli();
+	local_irq_save(flags);
 
 	if (!info->first_recv_buffer)
 		info->first_recv_buffer = buffer;
@@ -2111,7 +2183,7 @@
 	if (info->recv_cnt > info->max_recv_cnt)
 		info->max_recv_cnt = info->recv_cnt;
 
-	restore_flags(flags);
+	local_irq_restore(flags);
 }
 
 static int
@@ -2131,11 +2203,7 @@
 		info->icount.rx++;
 	} else {
 		struct tty_struct *tty = info->tty;
-		*tty->flip.char_buf_ptr = data;
-		*tty->flip.flag_buf_ptr = flag;
-		tty->flip.flag_buf_ptr++;
-		tty->flip.char_buf_ptr++;
-		tty->flip.count++;
+		tty_insert_flip_char(tty, data, flag);
 		info->icount.rx++;
 	}
 
@@ -2320,7 +2388,6 @@
 	 */
 	return;
 #endif
-	info->tty->flip.count = 0;
 	if (info->uses_dma_in) {
 		/* reset the input dma channel to be sure it works */
 
@@ -2482,70 +2549,21 @@
 {
 	struct tty_struct *tty;
 	struct etrax_recv_buffer *buffer;
-	unsigned int length;
 	unsigned long flags;
-	int max_flip_size;
-
-	if (!info->first_recv_buffer)
-		return;
 
-	save_flags(flags);
-	cli();
+	local_irq_save(flags);
+	tty = info->tty;
 
-	if (!(tty = info->tty)) {
-		restore_flags(flags);
+	if (!tty) {
+		local_irq_restore(flags);
 		return;
 	}
 
-	length = tty->flip.count;
-	/* Don't flip more than the ldisc has room for.
-	 * The return value from ldisc.receive_room(tty) - might not be up to
-	 * date, the previous flip of up to TTY_FLIPBUF_SIZE might be on the
-	 * processed and not accounted for yet.
-	 * Since we use DMA, 1 SERIAL_DESCR_BUF_SIZE could be on the way.
-	 * Lets buffer data here and let flow control take care of it.
-	 * Since we normally flip large chunks, the ldisc don't react
-	 * with throttle until too late if we flip to much.
-	 */
-	max_flip_size = tty->ldisc.receive_room(tty);
-	if (max_flip_size < 0)
-		max_flip_size = 0;
-	if (max_flip_size <= (TTY_FLIPBUF_SIZE +         /* Maybe not accounted for */
-			      length + info->recv_cnt +  /* We have this queued */
-			      2*SERIAL_DESCR_BUF_SIZE +    /* This could be on the way */
-			      TTY_THRESHOLD_THROTTLE)) { /* Some slack */
-		/* check TTY_THROTTLED first so it indicates our state */
-		if (!test_and_set_bit(TTY_THROTTLED, &tty->flags)) {
-			DFLOW(DEBUG_LOG(info->line,"flush_to_flip throttles room %lu\n", max_flip_size));
-			rs_throttle(tty);
-		}
-#if 0
-		else if (max_flip_size <= (TTY_FLIPBUF_SIZE +         /* Maybe not accounted for */
-					   length + info->recv_cnt +  /* We have this queued */
-					   SERIAL_DESCR_BUF_SIZE +    /* This could be on the way */
-					   TTY_THRESHOLD_THROTTLE)) { /* Some slack */
-			DFLOW(DEBUG_LOG(info->line,"flush_to_flip throttles again! %lu\n", max_flip_size));
-			rs_throttle(tty);
-		}
-#endif
-	}
-
-	if (max_flip_size > TTY_FLIPBUF_SIZE)
-		max_flip_size = TTY_FLIPBUF_SIZE;
-
-	while ((buffer = info->first_recv_buffer) && length < max_flip_size) {
+	while ((buffer = info->first_recv_buffer)) {
 		unsigned int count = buffer->length;
 
-		if (length + count > max_flip_size)
-			count = max_flip_size - length;
-
-		memcpy(tty->flip.char_buf_ptr + length, buffer->buffer, count);
-		memset(tty->flip.flag_buf_ptr + length, TTY_NORMAL, count);
-		tty->flip.flag_buf_ptr[length] = buffer->error;
-
-		length += count;
+		tty_insert_flip_string(tty, buffer->buffer, count);
 		info->recv_cnt -= count;
-		DFLIP(DEBUG_LOG(info->line,"flip: %i\n", length));
 
 		if (count == buffer->length) {
 			info->first_recv_buffer = buffer->next;
@@ -2560,24 +2578,7 @@
 	if (!info->first_recv_buffer)
 		info->last_recv_buffer = NULL;
 
-	tty->flip.count = length;
-	DFLIP(if (tty->ldisc.chars_in_buffer(tty) > 3500) {
-		DEBUG_LOG(info->line, "ldisc %lu\n",
-			  tty->ldisc.chars_in_buffer(tty));
-		DEBUG_LOG(info->line, "flip.count %lu\n",
-			  tty->flip.count);
-	      }
-	      );
-	restore_flags(flags);
-
-	DFLIP(
-	  if (1) {
-		  DEBUG_LOG(info->line, "*** rxtot %i\n", info->icount.rx);
-		  DEBUG_LOG(info->line, "ldisc %lu\n", tty->ldisc.chars_in_buffer(tty));
-		  DEBUG_LOG(info->line, "room  %lu\n", tty->ldisc.receive_room(tty));
-	  }
-
-	);
+	local_irq_restore(flags);
 
 	/* this includes a check for low-latency */
 	tty_flip_buffer_push(tty);
@@ -2722,21 +2723,7 @@
 		printk("!NO TTY!\n");
 		return info;
 	}
-	if (tty->flip.count >= TTY_FLIPBUF_SIZE - TTY_THRESHOLD_THROTTLE) {
-		/* check TTY_THROTTLED first so it indicates our state */
-		if (!test_and_set_bit(TTY_THROTTLED, &tty->flags)) {
-			DFLOW(DEBUG_LOG(info->line, "rs_throttle flip.count: %i\n", tty->flip.count));
-			rs_throttle(tty);
-		}
-	}
-	if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
-		DEBUG_LOG(info->line, "force FLIP! %i\n", tty->flip.count);
-		tty->flip.work.func((void *) tty);
-		if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
-			DEBUG_LOG(info->line, "FLIP FULL! %i\n", tty->flip.count);
-			return info;		/* if TTY_DONT_FLIP is set */
-		}
-	}
+
 	/* Read data and status at the same time */
 	data_read = *((unsigned long *)&info->port[REG_DATA_STATUS32]);
 more_data:
@@ -2789,27 +2776,25 @@
 				DEBUG_LOG(info->line, "EBRK %i\n", info->break_detected_cnt);
 				info->errorcode = ERRCODE_INSERT_BREAK;
 			} else {
+				unsigned char data = IO_EXTRACT(R_SERIAL0_READ, data_in, data_read);
+				char flag = TTY_NORMAL;
 				if (info->errorcode == ERRCODE_INSERT_BREAK) {
-					info->icount.brk++;
-					*tty->flip.char_buf_ptr = 0;
-					*tty->flip.flag_buf_ptr = TTY_BREAK;
-					tty->flip.flag_buf_ptr++;
-					tty->flip.char_buf_ptr++;
-					tty->flip.count++;
+					struct tty_struct *tty = info->tty;
+					tty_insert_flip_char(tty, 0, flag);
 					info->icount.rx++;
 				}
-				*tty->flip.char_buf_ptr = IO_EXTRACT(R_SERIAL0_READ, data_in, data_read);
 
 				if (data_read & IO_MASK(R_SERIAL0_READ, par_err)) {
 					info->icount.parity++;
-					*tty->flip.flag_buf_ptr = TTY_PARITY;
+					flag = TTY_PARITY;
 				} else if (data_read & IO_MASK(R_SERIAL0_READ, overrun)) {
 					info->icount.overrun++;
-					*tty->flip.flag_buf_ptr = TTY_OVERRUN;
+					flag = TTY_OVERRUN;
 				} else if (data_read & IO_MASK(R_SERIAL0_READ, framing_err)) {
 					info->icount.frame++;
-					*tty->flip.flag_buf_ptr = TTY_FRAME;
+					flag = TTY_FRAME;
 				}
+				tty_insert_flip_char(tty, data, flag);
 				info->errorcode = 0;
 			}
 			info->break_detected_cnt = 0;
@@ -2825,16 +2810,12 @@
 			log_int(rdpc(), 0, 0);
 		}
 		);
-		*tty->flip.char_buf_ptr = IO_EXTRACT(R_SERIAL0_READ, data_in, data_read);
-		*tty->flip.flag_buf_ptr = 0;
+		tty_insert_flip_char(tty, IO_EXTRACT(R_SERIAL0_READ, data_in, data_read), TTY_NORMAL);
 	} else {
 		DEBUG_LOG(info->line, "ser_rx int but no data_avail  %08lX\n", data_read);
 	}
 
 
-	tty->flip.flag_buf_ptr++;
-	tty->flip.char_buf_ptr++;
-	tty->flip.count++;
 	info->icount.rx++;
 	data_read = *((unsigned long *)&info->port[REG_DATA_STATUS32]);
 	if (data_read & IO_MASK(R_SERIAL0_READ, data_avail)) {
@@ -2972,7 +2953,7 @@
 	if (info->x_char) {
 		unsigned char rstat;
 		DFLOW(DEBUG_LOG(info->line, "tx_int: xchar 0x%02X\n", info->x_char));
-		save_flags(flags); cli();
+		local_irq_save(flags);
 		rstat = info->port[REG_STATUS];
 		DFLOW(DEBUG_LOG(info->line, "stat %x\n", rstat));
 
@@ -2981,7 +2962,7 @@
 		info->x_char = 0;
 		/* We must enable since it is disabled in ser_interrupt */
 		e100_enable_serial_tx_ready_irq(info);
-		restore_flags(flags);
+		local_irq_restore(flags);
 		return;
 	}
 	if (info->uses_dma_out) {
@@ -2989,7 +2970,7 @@
 		int i;
 		/* We only use normal tx interrupt when sending x_char */
 		DFLOW(DEBUG_LOG(info->line, "tx_int: xchar sent\n", 0));
-		save_flags(flags); cli();
+		local_irq_save(flags);
 		rstat = info->port[REG_STATUS];
 		DFLOW(DEBUG_LOG(info->line, "stat %x\n", rstat));
 		e100_disable_serial_tx_ready_irq(info);
@@ -3002,7 +2983,7 @@
 			nop();
 
 		*info->ocmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, continue);
-		restore_flags(flags);
+		local_irq_restore(flags);
 		return;
 	}
 	/* Normal char-by-char interrupt */
@@ -3016,7 +2997,7 @@
 	}
 	DINTR2(DEBUG_LOG(info->line, "tx_int %c\n", info->xmit.buf[info->xmit.tail]));
 	/* Send a byte, rs485 timing is critical so turn of ints */
-	save_flags(flags); cli();
+	local_irq_save(flags);
 	info->port[REG_TR_DATA] = info->xmit.buf[info->xmit.tail];
 	info->xmit.tail = (info->xmit.tail + 1) & (SERIAL_XMIT_SIZE-1);
 	info->icount.tx++;
@@ -3040,7 +3021,7 @@
 		/* We must enable since it is disabled in ser_interrupt */
 		e100_enable_serial_tx_ready_irq(info);
 	}
-	restore_flags(flags);
+	local_irq_restore(flags);
 
 	if (CIRC_CNT(info->xmit.head,
 		     info->xmit.tail,
@@ -3065,7 +3046,7 @@
 	int handled = 0;
 	static volatile unsigned long reentered_ready_mask = 0;
 
-	save_flags(flags); cli();
+	local_irq_save(flags);
 	irq_mask1_rd = *R_IRQ_MASK1_RD;
 	/* First handle all rx interrupts with ints disabled */
 	info = rs_table;
@@ -3110,7 +3091,7 @@
 			/* Unblock the serial interrupt */
 			*R_VECT_MASK_SET = IO_STATE(R_VECT_MASK_SET, serial, set);
 
-			sti();
+			local_irq_enable();
 			ready_mask = (1 << (8+1+2*0)); /* ser0 tr_ready */
 			info = rs_table;
 			for (i = 0; i < NR_PORTS; i++) {
@@ -3123,11 +3104,11 @@
 				ready_mask <<= 2;
 			}
 			/* handle_ser_tx_interrupt enables tr_ready interrupts */
-			cli();
+			local_irq_disable();
 			/* Handle reentered TX interrupt */
 			irq_mask1_rd = reentered_ready_mask;
 		}
-		cli();
+		local_irq_disable();
 		tx_started = 0;
 	} else {
 		unsigned long ready_mask;
@@ -3143,7 +3124,7 @@
 		}
 	}
 
-	restore_flags(flags);
+	local_irq_restore(flags);
 	return IRQ_RETVAL(handled);
 } /* ser_interrupt */
 #endif
@@ -3192,13 +3173,12 @@
 	if (!xmit_page)
 		return -ENOMEM;
 
-	save_flags(flags);
-	cli();
+	local_irq_save(flags);
 
 	/* if it was already initialized, skip this */
 
 	if (info->flags & ASYNC_INITIALIZED) {
-		restore_flags(flags);
+		local_irq_restore(flags);
 		free_page(xmit_page);
 		return 0;
 	}
@@ -3324,7 +3304,7 @@
 
 	info->flags |= ASYNC_INITIALIZED;
 
-	restore_flags(flags);
+	local_irq_restore(flags);
 	return 0;
 }
 
@@ -3375,8 +3355,7 @@
 	       info->irq);
 #endif
 
-	save_flags(flags);
-	cli(); /* Disable interrupts */
+	local_irq_save(flags);
 
 	if (info->xmit.buf) {
 		free_page((unsigned long)info->xmit.buf);
@@ -3400,7 +3379,7 @@
 		set_bit(TTY_IO_ERROR, &info->tty->flags);
 
 	info->flags &= ~ASYNC_INITIALIZED;
-	restore_flags(flags);
+	local_irq_restore(flags);
 }
 
 
@@ -3492,8 +3471,7 @@
 
 #ifndef CONFIG_SVINTO_SIM
 	/* start with default settings and then fill in changes */
-	save_flags(flags);
-	cli();
+	local_irq_save(flags);
 	/* 8 bit, no/even parity */
 	info->rx_ctrl &= ~(IO_MASK(R_SERIAL0_REC_CTRL, rec_bitnr) |
 			   IO_MASK(R_SERIAL0_REC_CTRL, rec_par_en) |
@@ -3557,7 +3535,7 @@
 	}
 
 	*((unsigned long *)&info->port[REG_XOFF]) = xoff;
-	restore_flags(flags);
+	local_irq_restore(flags);
 #endif /* !CONFIG_SVINTO_SIM */
 
 	update_char_time(info);
@@ -3585,13 +3563,12 @@
 
 	/* this protection might not exactly be necessary here */
 
-	save_flags(flags);
-	cli();
+	local_irq_save(flags);
 	start_transmit(info);
-	restore_flags(flags);
+	local_irq_restore(flags);
 }
 
-static int rs_raw_write(struct tty_struct * tty, int from_user,
+static int rs_raw_write(struct tty_struct * tty,
 			const unsigned char *buf, int count)
 {
 	int	c, ret = 0;
@@ -3614,72 +3591,37 @@
 	SIMCOUT(buf, count);
 	return count;
 #endif
-	save_flags(flags);
+	local_save_flags(flags);
 	DFLOW(DEBUG_LOG(info->line, "write count %i ", count));
 	DFLOW(DEBUG_LOG(info->line, "ldisc %i\n", tty->ldisc.chars_in_buffer(tty)));
 
 
-	/* the cli/restore_flags pairs below are needed because the
+	/* the local_irq_disable/restore_flags pairs below are needed because the
 	 * DMA interrupt handler moves the info->xmit values. the memcpy
 	 * needs to be in the critical region unfortunately, because we
 	 * need to read xmit values, memcpy, write xmit values in one
 	 * atomic operation... this could perhaps be avoided by more clever
 	 * design.
 	 */
-	if (from_user) {
-		mutex_lock(&tmp_buf_mutex);
-		while (1) {
-			int c1;
-			c = CIRC_SPACE_TO_END(info->xmit.head,
-					      info->xmit.tail,
-					      SERIAL_XMIT_SIZE);
-			if (count < c)
-				c = count;
-			if (c <= 0)
-				break;
-
-			c -= copy_from_user(tmp_buf, buf, c);
-			if (!c) {
-				if (!ret)
-					ret = -EFAULT;
-				break;
-			}
-			cli();
-			c1 = CIRC_SPACE_TO_END(info->xmit.head,
-					       info->xmit.tail,
-					       SERIAL_XMIT_SIZE);
-			if (c1 < c)
-				c = c1;
-			memcpy(info->xmit.buf + info->xmit.head, tmp_buf, c);
-			info->xmit.head = ((info->xmit.head + c) &
-					   (SERIAL_XMIT_SIZE-1));
-			restore_flags(flags);
-			buf += c;
-			count -= c;
-			ret += c;
-		}
-		mutex_unlock(&tmp_buf_mutex);
-	} else {
-		cli();
-		while (count) {
-			c = CIRC_SPACE_TO_END(info->xmit.head,
-					      info->xmit.tail,
-					      SERIAL_XMIT_SIZE);
-
-			if (count < c)
-				c = count;
-			if (c <= 0)
-				break;
-
-			memcpy(info->xmit.buf + info->xmit.head, buf, c);
-			info->xmit.head = (info->xmit.head + c) &
-				(SERIAL_XMIT_SIZE-1);
-			buf += c;
-			count -= c;
-			ret += c;
-		}
-		restore_flags(flags);
+	local_irq_disable();
+	while (count) {
+		c = CIRC_SPACE_TO_END(info->xmit.head,
+				      info->xmit.tail,
+				      SERIAL_XMIT_SIZE);
+
+		if (count < c)
+			c = count;
+		if (c <= 0)
+			break;
+
+		memcpy(info->xmit.buf + info->xmit.head, buf, c);
+		info->xmit.head = (info->xmit.head + c) &
+			(SERIAL_XMIT_SIZE-1);
+		buf += c;
+		count -= c;
+		ret += c;
 	}
+	local_irq_restore(flags);
 
 	/* enable transmitter if not running, unless the tty is stopped
 	 * this does not need IRQ protection since if tr_running == 0
@@ -3698,7 +3640,7 @@
 } /* raw_raw_write() */
 
 static int
-rs_write(struct tty_struct * tty, int from_user,
+rs_write(struct tty_struct * tty,
 	 const unsigned char *buf, int count)
 {
 #if defined(CONFIG_ETRAX_RS485)
@@ -3725,7 +3667,7 @@
 	}
 #endif /* CONFIG_ETRAX_RS485 */
 
-	count = rs_raw_write(tty, from_user, buf, count);
+	count = rs_raw_write(tty, buf, count);
 
 #if defined(CONFIG_ETRAX_RS485)
 	if (info->rs485.enabled)
@@ -3793,10 +3735,9 @@
 	struct e100_serial *info = (struct e100_serial *)tty->driver_data;
 	unsigned long flags;
 
-	save_flags(flags);
-	cli();
+	local_irq_save(flags);
 	info->xmit.head = info->xmit.tail = 0;
-	restore_flags(flags);
+	local_irq_restore(flags);
 
 	wake_up_interruptible(&tty->write_wait);
 
@@ -3818,7 +3759,7 @@
 {
 	struct e100_serial *info = (struct e100_serial *)tty->driver_data;
 	unsigned long flags;
-	save_flags(flags); cli();
+	local_irq_save(flags);
 	if (info->uses_dma_out) {
 		/* Put the DMA on hold and disable the channel */
 		*info->ocmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, hold);
@@ -3835,7 +3776,7 @@
 	DFLOW(DEBUG_LOG(info->line, "rs_send_xchar 0x%02X\n", ch));
 	info->x_char = ch;
 	e100_enable_serial_tx_ready_irq(info);
-	restore_flags(flags);
+	local_irq_restore(flags);
 }
 
 /*
@@ -4085,61 +4026,6 @@
 	return 0;
 }
 
-
-static int
-set_modem_info(struct e100_serial * info, unsigned int cmd,
-	       unsigned int *value)
-{
-	unsigned int arg;
-
-	if (copy_from_user(&arg, value, sizeof(int)))
-		return -EFAULT;
-
-	switch (cmd) {
-	case TIOCMBIS:
-		if (arg & TIOCM_RTS) {
-			e100_rts(info, 1);
-		}
-		if (arg & TIOCM_DTR) {
-			e100_dtr(info, 1);
-		}
-		/* Handle FEMALE behaviour */
-		if (arg & TIOCM_RI) {
-			e100_ri_out(info, 1);
-		}
-		if (arg & TIOCM_CD) {
-			e100_cd_out(info, 1);
-		}
-		break;
-	case TIOCMBIC:
-		if (arg & TIOCM_RTS) {
-			e100_rts(info, 0);
-		}
-		if (arg & TIOCM_DTR) {
-			e100_dtr(info, 0);
-		}
-		/* Handle FEMALE behaviour */
-		if (arg & TIOCM_RI) {
-			e100_ri_out(info, 0);
-		}
-		if (arg & TIOCM_CD) {
-			e100_cd_out(info, 0);
-		}
-		break;
-	case TIOCMSET:
-		e100_rts(info, arg & TIOCM_RTS);
-		e100_dtr(info, arg & TIOCM_DTR);
-		/* Handle FEMALE behaviour */
-		e100_ri_out(info, arg & TIOCM_RI);
-		e100_cd_out(info, arg & TIOCM_CD);
-		break;
-	default:
-		return -EINVAL;
-	}
-	return 0;
-}
-
-
 static void
 rs_break(struct tty_struct *tty, int break_state)
 {
@@ -4149,8 +4035,7 @@
 	if (!info->port)
 		return;
 
-	save_flags(flags);
-	cli();
+	local_irq_save(flags);
 	if (break_state == -1) {
 		/* Go to manual mode and set the txd pin to 0 */
 		info->tx_ctrl &= 0x3F; /* Clear bit 7 (txd) and 6 (tr_enable) */
@@ -4158,7 +4043,42 @@
 		info->tx_ctrl |= (0x80 | 0x40); /* Set bit 7 (txd) and 6 (tr_enable) */
 	}
 	info->port[REG_TR_CTRL] = info->tx_ctrl;
-	restore_flags(flags);
+	local_irq_restore(flags);
+}
+
+static int
+rs_tiocmset(struct tty_struct *tty, struct file * file, unsigned int set, unsigned int clear)
+{
+	struct e100_serial * info = (struct e100_serial *)tty->driver_data;
+  
+	if (clear & TIOCM_RTS) {
+		e100_rts(info, 0);
+	}
+	if (clear & TIOCM_DTR) {
+		e100_dtr(info, 0);
+	}
+	/* Handle FEMALE behaviour */
+	if (clear & TIOCM_RI) {
+		e100_ri_out(info, 0);
+	}
+	if (clear & TIOCM_CD) {
+		e100_cd_out(info, 0);
+	}
+
+	if (set & TIOCM_RTS) {
+		e100_rts(info, 1);
+	}
+	if (set & TIOCM_DTR) {
+		e100_dtr(info, 1);
+	}
+	/* Handle FEMALE behaviour */
+	if (set & TIOCM_RI) {
+		e100_ri_out(info, 1);
+	}
+	if (set & TIOCM_CD) {
+		e100_cd_out(info, 1);
+	}
+	return 0;
 }
 
 static int
@@ -4177,10 +4097,6 @@
 	switch (cmd) {
 		case TIOCMGET:
 			return get_modem_info(info, (unsigned int *) arg);
-		case TIOCMBIS:
-		case TIOCMBIC:
-		case TIOCMSET:
-			return set_modem_info(info, cmd, (unsigned int *) arg);
 		case TIOCGSERIAL:
 			return get_serial_info(info,
 					       (struct serial_struct *) arg);
@@ -4212,7 +4128,7 @@
 			if (copy_from_user(&rs485wr, (struct rs485_write*)arg, sizeof(rs485wr)))
 				return -EFAULT;
 
-			return e100_write_rs485(tty, 1, rs485wr.outc, rs485wr.outc_size);
+			return e100_write_rs485(tty, rs485wr.outc, rs485wr.outc_size);
 		}
 #endif
 
@@ -4242,46 +4158,6 @@
 
 }
 
-/* In debugport.c - register a console write function that uses the normal
- * serial driver
- */
-typedef int (*debugport_write_function)(int i, const char *buf, unsigned int len);
-
-extern debugport_write_function debug_write_function;
-
-static int rs_debug_write_function(int i, const char *buf, unsigned int len)
-{
-	int cnt;
-	int written = 0;
-        struct tty_struct *tty;
-        static int recurse_cnt = 0;
-
-        tty = rs_table[i].tty;
-        if (tty)  {
-		unsigned long flags;
-		if (recurse_cnt > 5) /* We skip this debug output */
-			return 1;
-
-		local_irq_save(flags);
-		recurse_cnt++;
-		local_irq_restore(flags);
-                do {
-                        cnt = rs_write(tty, 0, buf + written, len);
-                        if (cnt >= 0) {
-				written += cnt;
-                                buf += cnt;
-                                len -= cnt;
-                        } else
-                                len = cnt;
-                } while(len > 0);
-		local_irq_save(flags);
-		recurse_cnt--;
-		local_irq_restore(flags);
-                return 1;
-        }
-        return 0;
-}
-
 /*
  * ------------------------------------------------------------
  * rs_close()
@@ -4303,11 +4179,10 @@
 
 	/* interrupts are disabled for this entire function */
 
-	save_flags(flags);
-	cli();
+	local_irq_save(flags);
 
 	if (tty_hung_up_p(filp)) {
-		restore_flags(flags);
+		local_irq_restore(flags);
 		return;
 	}
 
@@ -4334,7 +4209,7 @@
 		info->count = 0;
 	}
 	if (info->count) {
-		restore_flags(flags);
+		local_irq_restore(flags);
 		return;
 	}
 	info->flags |= ASYNC_CLOSING;
@@ -4388,7 +4263,7 @@
 	}
 	info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
 	wake_up_interruptible(&info->close_wait);
-	restore_flags(flags);
+	local_irq_restore(flags);
 
 	/* port closed */
 
@@ -4410,6 +4285,28 @@
 #endif
 	}
 #endif
+
+	/*
+	 * Release any allocated DMA irq's.
+	 */
+	if (info->dma_in_enabled) {
+		cris_free_dma(info->dma_in_nbr, info->dma_in_irq_description);
+		free_irq(info->dma_in_irq_nbr,
+			 info);
+		info->uses_dma_in = 0;
+#ifdef SERIAL_DEBUG_OPEN
+		printk("DMA irq '%s' freed\n", info->dma_in_irq_description);
+#endif
+	}
+	if (info->dma_out_enabled) {
+		free_irq(info->dma_out_irq_nbr,
+			 info);
+		cris_free_dma(info->dma_out_nbr, info->dma_out_irq_description);
+		info->uses_dma_out = 0;
+#ifdef SERIAL_DEBUG_OPEN
+		printk("DMA irq '%s' freed\n", info->dma_out_irq_description);
+#endif
+	}
 }
 
 /*
@@ -4485,7 +4382,7 @@
 	if (tty_hung_up_p(filp) ||
 	    (info->flags & ASYNC_CLOSING)) {
 		if (info->flags & ASYNC_CLOSING)
-			interruptible_sleep_on(&info->close_wait);
+			wait_event_interruptible(info->close_wait, 0);
 #ifdef SERIAL_DO_RESTART
 		if (info->flags & ASYNC_HUP_NOTIFY)
 			return -EAGAIN;
@@ -4523,21 +4420,19 @@
 	printk("block_til_ready before block: ttyS%d, count = %d\n",
 	       info->line, info->count);
 #endif
-	save_flags(flags);
-	cli();
+	local_irq_save(flags);
 	if (!tty_hung_up_p(filp)) {
 		extra_count++;
 		info->count--;
 	}
-	restore_flags(flags);
+	local_irq_restore(flags);
 	info->blocked_open++;
 	while (1) {
-		save_flags(flags);
-		cli();
+		local_irq_save(flags);
 		/* assert RTS and DTR */
 		e100_rts(info, 1);
 		e100_dtr(info, 1);
-		restore_flags(flags);
+		local_irq_restore(flags);
 		set_current_state(TASK_INTERRUPTIBLE);
 		if (tty_hung_up_p(filp) ||
 		    !(info->flags & ASYNC_INITIALIZED)) {
@@ -4589,9 +4484,9 @@
 	struct e100_serial	*info;
 	int 			retval, line;
 	unsigned long           page;
+	int                     allocated_resources = 0;
 
 	/* find which port we want to open */
-
 	line = tty->index;
 
 	if (line < 0 || line >= NR_PORTS)
@@ -4632,7 +4527,7 @@
 	if (tty_hung_up_p(filp) ||
 	    (info->flags & ASYNC_CLOSING)) {
 		if (info->flags & ASYNC_CLOSING)
-			interruptible_sleep_on(&info->close_wait);
+			wait_event_interruptible(info->close_wait, 0);
 #ifdef SERIAL_DO_RESTART
 		return ((info->flags & ASYNC_HUP_NOTIFY) ?
 			-EAGAIN : -ERESTARTSYS);
@@ -4642,12 +4537,79 @@
 	}
 
 	/*
+	 * If DMA is enabled try to allocate the irq's.
+	 */
+	if (info->count == 1) {
+		allocated_resources = 1;
+		if (info->dma_in_enabled) {
+			if (request_irq(info->dma_in_irq_nbr,
+					rec_interrupt,
+					info->dma_in_irq_flags,
+					info->dma_in_irq_description,
+					info)) {
+				printk(KERN_WARNING "DMA irq '%s' busy; falling back to non-DMA mode\n", info->dma_in_irq_description);
+				/* Make sure we never try to use DMA in for the port again. */
+				info->dma_in_enabled = 0;
+			} else if (cris_request_dma(info->dma_in_nbr,
+						    info->dma_in_irq_description,
+						    DMA_VERBOSE_ON_ERROR,
+						    info->dma_owner)) {
+				free_irq(info->dma_in_irq_nbr, info);
+				printk(KERN_WARNING "DMA '%s' busy; falling back to non-DMA mode\n", info->dma_in_irq_description);
+				/* Make sure we never try to use DMA in for the port again. */
+				info->dma_in_enabled = 0;
+			}
+#ifdef SERIAL_DEBUG_OPEN
+			else printk("DMA irq '%s' allocated\n", info->dma_in_irq_description);
+#endif
+		}
+		if (info->dma_out_enabled) {
+			if (request_irq(info->dma_out_irq_nbr,
+					       tr_interrupt,
+					       info->dma_out_irq_flags,
+					       info->dma_out_irq_description,
+					       info)) {
+				printk(KERN_WARNING "DMA irq '%s' busy; falling back to non-DMA mode\n", info->dma_out_irq_description);
+				/* Make sure we never try to use DMA out for the port again. */
+				info->dma_out_enabled = 0;
+			} else if (cris_request_dma(info->dma_out_nbr,
+					     info->dma_out_irq_description,
+					     DMA_VERBOSE_ON_ERROR,
+					     info->dma_owner)) {
+				free_irq(info->dma_out_irq_nbr, info);
+				printk(KERN_WARNING "DMA '%s' busy; falling back to non-DMA mode\n", info->dma_out_irq_description);
+				/* Make sure we never try to use DMA in for the port again. */
+				info->dma_out_enabled = 0;
+			}
+#ifdef SERIAL_DEBUG_OPEN
+			else printk("DMA irq '%s' allocated\n", info->dma_out_irq_description);
+#endif
+		}
+	}
+
+	/*
 	 * Start up the serial port
 	 */
 
 	retval = startup(info);
-	if (retval)
-		return retval;
+	if (retval) {
+		if (allocated_resources) {
+			if (info->dma_out_enabled) {
+				cris_free_dma(info->dma_out_nbr, info->dma_out_irq_description);
+				free_irq(info->dma_out_irq_nbr,
+					 info);
+			}
+			if (info->dma_in_enabled) {
+				cris_free_dma(info->dma_in_nbr, info->dma_in_irq_description);
+				free_irq(info->dma_in_irq_nbr,
+					 info);
+			}
+		}
+		/* FIXME Decrease count info->count here too? */
+ 		return retval;
+  
+	}
+
 
 	retval = block_til_ready(tty, filp, info);
 	if (retval) {
@@ -4655,6 +4617,19 @@
 		printk("rs_open returning after block_til_ready with %d\n",
 		       retval);
 #endif
+		if (allocated_resources) {
+			if (info->dma_out_enabled) {
+				cris_free_dma(info->dma_out_nbr, info->dma_out_irq_description);
+				free_irq(info->dma_out_irq_nbr,
+					 info);
+			}
+			if (info->dma_in_enabled) {
+				cris_free_dma(info->dma_in_nbr, info->dma_in_irq_description);
+				free_irq(info->dma_in_irq_nbr,
+					 info);
+			}
+		}
+		
 		return retval;
 	}
 
@@ -4844,6 +4819,7 @@
 	.send_xchar = rs_send_xchar,
 	.wait_until_sent = rs_wait_until_sent,
 	.read_proc = rs_read_proc,
+	.tiocmset = rs_tiocmset
 };
 
 static int __init
@@ -4863,7 +4839,22 @@
 #if !defined(CONFIG_ETRAX_SERIAL_FAST_TIMER)
 	init_timer(&flush_timer);
 	flush_timer.function = timed_flush_handler;
-	mod_timer(&flush_timer, jiffies + CONFIG_ETRAX_SERIAL_RX_TIMEOUT_TICKS);
+	mod_timer(&flush_timer, jiffies + 5);
+#endif
+
+#if defined(CONFIG_ETRAX_RS485)
+#if defined(CONFIG_ETRAX_RS485_ON_PA)
+	if (cris_io_interface_allocate_pins(if_ser0, 'a', rs485_pa_bit, rs485_pa_bit)) {
+ 		printk(KERN_CRIT "ETRAX100LX serial: Could not allocate RS485 pin\n");
+		return -EBUSY;
+	}
+#endif
+#if defined(CONFIG_ETRAX_RS485_ON_PORT_G)
+	if (cris_io_interface_allocate_pins(if_ser0, 'g', rs485_pa_bit, rs485_port_g_bit)) {
+ 		printk(KERN_CRIT "ETRAX100LX serial: Could not allocate RS485 pin\n");
+		return -EBUSY;
+	}
+#endif
 #endif
 
 	/* Initialize the tty_driver structure */
@@ -4888,6 +4879,14 @@
 	/* do some initializing for the separate ports */
 
 	for (i = 0, info = rs_table; i < NR_PORTS; i++,info++) {
+		if (info->enabled) {
+			if (cris_request_io_interface(info->io_if, info->io_if_description)) {
+				printk(KERN_CRIT "ETRAX100LX async serial: Could not allocate IO pins for %s, port %d\n",
+				       info->io_if_description,
+				       i);
+				info->enabled = 0;
+			}
+		}
 		info->uses_dma_in = 0;
 		info->uses_dma_out = 0;
 		info->line = i;
@@ -4939,64 +4938,16 @@
 #endif
 
 #ifndef CONFIG_SVINTO_SIM
+#ifndef CONFIG_ETRAX_KGDB
 	/* Not needed in simulator.  May only complicate stuff. */
 	/* hook the irq's for DMA channel 6 and 7, serial output and input, and some more... */
 
-	if (request_irq(SERIAL_IRQ_NBR, ser_interrupt, IRQF_SHARED | IRQF_DISABLED, "serial ", NULL))
-		panic("irq8");
-
-#ifdef CONFIG_ETRAX_SERIAL_PORT0
-#ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA6_OUT
-	if (request_irq(SER0_DMA_TX_IRQ_NBR, tr_interrupt, IRQF_DISABLED, "serial 0 dma tr", NULL))
-		panic("irq22");
-#endif
-#ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA7_IN
-	if (request_irq(SER0_DMA_RX_IRQ_NBR, rec_interrupt, IRQF_DISABLED, "serial 0 dma rec", NULL))
-		panic("irq23");
-#endif
-#endif
-
-#ifdef CONFIG_ETRAX_SERIAL_PORT1
-#ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA8_OUT
-	if (request_irq(SER1_DMA_TX_IRQ_NBR, tr_interrupt, IRQF_DISABLED, "serial 1 dma tr", NULL))
-		panic("irq24");
-#endif
-#ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA9_IN
-	if (request_irq(SER1_DMA_RX_IRQ_NBR, rec_interrupt, IRQF_DISABLED, "serial 1 dma rec", NULL))
-		panic("irq25");
-#endif
-#endif
-#ifdef CONFIG_ETRAX_SERIAL_PORT2
-	/* DMA Shared with par0 (and SCSI0 and ATA) */
-#ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA2_OUT
-	if (request_irq(SER2_DMA_TX_IRQ_NBR, tr_interrupt, IRQF_SHARED | IRQF_DISABLED, "serial 2 dma tr", NULL))
-		panic("irq18");
-#endif
-#ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA3_IN
-	if (request_irq(SER2_DMA_RX_IRQ_NBR, rec_interrupt, IRQF_SHARED | IRQF_DISABLED, "serial 2 dma rec", NULL))
-		panic("irq19");
-#endif
-#endif
-#ifdef CONFIG_ETRAX_SERIAL_PORT3
-	/* DMA Shared with par1 (and SCSI1 and Extern DMA 0) */
-#ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA4_OUT
-	if (request_irq(SER3_DMA_TX_IRQ_NBR, tr_interrupt, IRQF_SHARED | IRQF_DISABLED, "serial 3 dma tr", NULL))
-		panic("irq20");
-#endif
-#ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA5_IN
-	if (request_irq(SER3_DMA_RX_IRQ_NBR, rec_interrupt, IRQF_SHARED | IRQF_DISABLED, "serial 3 dma rec", NULL))
-		panic("irq21");
-#endif
-#endif
+	if (request_irq(SERIAL_IRQ_NBR, ser_interrupt, IRQF_SHARED | IRQF_DISABLED, "serial ", driver))
+		panic("%s: Failed to request irq8", __FUNCTION__);
 
-#ifdef CONFIG_ETRAX_SERIAL_FLUSH_DMA_FAST
-	if (request_irq(TIMER1_IRQ_NBR, timeout_interrupt, IRQF_SHARED | IRQF_DISABLED,
-		       "fast serial dma timeout", NULL)) {
-		printk(KERN_CRIT "err: timer1 irq\n");
-	}
 #endif
 #endif /* CONFIG_SVINTO_SIM */
-	debug_write_function = rs_debug_write_function;
+
 	return 0;
 }
 
--- linux-2.6.19.2.orig/drivers/serial/crisv10.h	2007-01-10 20:10:37.000000000 +0100
+++ linux-2.6.19.2.dev/drivers/serial/crisv10.h	2006-10-13 14:44:38.000000000 +0200
@@ -9,6 +9,8 @@
 
 #include <linux/circ_buf.h>
 #include <asm/termios.h>
+#include <asm/dma.h>
+#include <asm/arch/io_interface_mux.h>
 
 /* Software state per channel */
 
@@ -61,6 +63,19 @@
 	u8		dma_in_enabled:1;  /* Set to 1 if DMA should be used */
 
 	/* end of fields defined in rs_table[] in .c-file */
+	int		dma_owner;
+	unsigned int	dma_in_nbr;
+	unsigned int	dma_out_nbr;
+	unsigned int	dma_in_irq_nbr;
+	unsigned int	dma_out_irq_nbr;
+	unsigned long	dma_in_irq_flags;
+	unsigned long	dma_out_irq_flags;
+	char		*dma_in_irq_description;
+	char		*dma_out_irq_description;
+
+	enum cris_io_interface io_if;
+	char            *io_if_description;
+
 	u8		uses_dma_in;  /* Set to 1 if DMA is used */
 	u8		uses_dma_out; /* Set to 1 if DMA is used */
 	u8		forced_eop;   /* a fifo eop has been forced */
--- linux-2.6.19.2.orig/drivers/serial/crisv32.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.19.2.dev/drivers/serial/crisv32.c	2007-01-05 09:59:53.000000000 +0100
@@ -0,0 +1,2333 @@
+/* $Id: crisv32.c,v 1.78 2007/01/05 08:59:53 starvik Exp $
+ *
+ * Serial port driver for the ETRAX FS chip
+ *
+ *    Copyright (C) 1998-2006  Axis Communications AB
+ *
+ *    Many, many authors. Based once upon a time on serial.c for 16x50.
+ *
+ *    Johan Adolfsson - port to ETRAX FS
+ *    Mikael Starvik - port to serial_core framework
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/console.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/serial_core.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+#include <asm/arch/dma.h>
+#include <asm/arch/system.h>
+#include <asm/arch/pinmux.h>
+#include <asm/arch/hwregs/dma.h>
+#include <asm/arch/hwregs/reg_rdwr.h>
+#include <asm/arch/hwregs/ser_defs.h>
+#include <asm/arch/hwregs/dma_defs.h>
+#include <asm/arch/hwregs/gio_defs.h>
+#include <asm/arch/hwregs/intr_vect_defs.h>
+#include <asm/arch/hwregs/reg_map.h>
+
+#define UART_NR 5 /* 4 ports + dummy port */
+#define SERIAL_RECV_DESCRIPTORS 8
+
+/* We only buffer 255 characters here, no need for more tx descriptors. */
+#define SERIAL_TX_DESCRIPTORS 4
+
+/* Kept for experimental purposes. */
+#define ETRAX_SER_FIFO_SIZE 1
+#define SERIAL_DESCR_BUF_SIZE 256
+#define regi_NULL 0
+#define DMA_WAIT_UNTIL_RESET(inst)			\
+  do {							\
+	reg_dma_rw_stat r;				\
+	do {						\
+	  	r = REG_RD(dma, (inst), rw_stat);	\
+	} while (r.mode != regk_dma_rst);		\
+  } while (0)
+
+/* Macro to set up control lines for a port. */
+#define SETUP_PINS(port) \
+	if (serial_cris_ports[port].used) { \
+	if (strcmp(CONFIG_ETRAX_SER##port##_DTR_BIT, "")) \
+		crisv32_io_get_name(&serial_cris_ports[port].dtr_pin, \
+				    CONFIG_ETRAX_SER##port##_DTR_BIT); \
+	else \
+		serial_cris_ports[port].dtr_pin = dummy_pin; \
+	if (strcmp(CONFIG_ETRAX_SER##port##_DSR_BIT, "")) \
+		crisv32_io_get_name(&serial_cris_ports[port].dsr_pin, \
+				    CONFIG_ETRAX_SER##port##_DSR_BIT); \
+	else \
+		serial_cris_ports[port].dsr_pin = dummy_pin; \
+	if (strcmp(CONFIG_ETRAX_SER##port##_RI_BIT, "")) \
+		crisv32_io_get_name(&serial_cris_ports[port].ri_pin, \
+				    CONFIG_ETRAX_SER##port##_RI_BIT); \
+	else \
+		serial_cris_ports[port].ri_pin = dummy_pin; \
+	if (strcmp(CONFIG_ETRAX_SER##port##_CD_BIT, "")) \
+		crisv32_io_get_name(&serial_cris_ports[port].cd_pin, \
+				    CONFIG_ETRAX_SER##port##_CD_BIT); \
+	else \
+		serial_cris_ports[port].cd_pin = dummy_pin; \
+	}
+
+/* Set a serial port register if anything has changed. */
+#define MODIFY_REG(instance, reg, var)			\
+  if (REG_RD_INT(ser, instance, reg)			\
+      != REG_TYPE_CONV(int, reg_ser_##reg, var))	\
+      REG_WR(ser, instance, reg, var);
+
+/*
+ * Regarding RS485 operation in crisv32 serial driver.
+ * ---------------------------------------------------
+ * RS485 can be run in two modes, full duplex using four wires (485FD) and
+ * half duplex using two wires (485HD). The default mode of each serial port 
+ * is configured in the kernel configuration. The available modes are: 
+ * RS-232, RS-485 half duplex, and RS-485 full duplex. 
+ *
+ * In the 485HD mode the direction of the data bus must be able to switch.
+ * The direction of the transceiver is controlled by the RTS signal. Hence 
+ * the auto_rts function in the ETRAX FS chip is enabled in this mode, which 
+ * automatically toggle RTS when transmitting. The initial direction of the 
+ * port is receiving.
+ *
+ * In the 485FD mode two transceivers will be used, one in each direction. 
+ * Usually the hardware can handle both 485HD and 485FD, which implies that 
+ * one of the transceivers can change direction. Consequently that transceiver 
+ * must be tied to operate in the opposite direction of the other one, setting
+ * and keeping RTS to a fixed value do this.
+ *
+ * There are two special "ioctl" that can configure the ports. These two are 
+ * left for backward compatible with older applications. The effects of using
+ * them are described below:
+ * The TIOCSERSETRS485:
+ * This ioctl sets a serial port in 232 mode to 485HD mode or vise versa. The
+ * state of the port is kept when closing the port. Note that this ioctl has no
+ * effect on a serial port in the 485FD mode.
+ * The TIOCSERWRRS485:
+ * This ioctl set a serial port in 232 mode to 485HD mode and writes the data
+ * "included" in the ioctl to the port. The port will then stay in 485HD mode.
+ * Using this ioctl on a serial port in the 485HD mode will transmit the data
+ * without changing the mode. Using this ioctl on a serial port in 485FD mode
+ * will not change the mode and simply send the data using the 485FD mode.
+ */
+
+#define TYPE_232 0
+#define TYPE_485HD 1
+#define TYPE_485FD 2
+
+struct etrax_recv_buffer {
+	struct etrax_recv_buffer *next;
+	unsigned short length;
+	unsigned char error;
+	unsigned char pad;
+
+	unsigned char buffer[0];
+};
+
+struct uart_cris_port {
+	struct uart_port	port;
+
+	int initialized;
+	int used;
+	int irq;
+
+	/* Used to check if port enabled as well by testing for zero. */
+	reg_scope_instances	regi_ser;
+	reg_scope_instances	regi_dmain;
+	reg_scope_instances	regi_dmaout;
+
+	struct crisv32_iopin    dtr_pin;
+	struct crisv32_iopin    dsr_pin;
+	struct crisv32_iopin    ri_pin;
+	struct crisv32_iopin    cd_pin;
+
+	struct dma_descr_context tr_context_descr
+		__attribute__ ((__aligned__(32)));
+	struct dma_descr_data	 tr_descr[SERIAL_TX_DESCRIPTORS]
+		__attribute__ ((__aligned__(32)));
+  	struct dma_descr_context rec_context_descr
+		__attribute__ ((__aligned__(32)));
+	struct dma_descr_data	 rec_descr[SERIAL_RECV_DESCRIPTORS]
+		__attribute__ ((__aligned__(32)));
+
+	/* This is the first one in the list the HW is working on now. */
+	struct dma_descr_data*   first_tx_descr;
+
+	/* This is the last one in the list the HW is working on now. */
+	struct dma_descr_data*   last_tx_descr;
+
+	/* This is how many characters the HW is working on now. */
+	unsigned int		 tx_pending_chars;
+
+	int			 tx_started;
+	unsigned int		 cur_rec_descr;
+	struct etrax_recv_buffer *first_recv_buffer;
+	struct etrax_recv_buffer *last_recv_buffer;
+
+	unsigned int		recv_cnt;
+	unsigned int		max_recv_cnt;
+
+	/* The time for 1 char, in usecs. */
+	unsigned long		char_time_usec;
+
+	/* Last tx usec in the jiffies. */
+	unsigned long		last_tx_active_usec;
+
+	/* Last tx time in jiffies. */
+	unsigned long		last_tx_active;
+
+	/* Last rx usec in the jiffies. */
+	unsigned long		last_rx_active_usec;
+
+	/* Last rx time in jiffies. */
+	unsigned long		last_rx_active;
+
+#ifdef CONFIG_ETRAX_RS485
+	/* RS-485 support, duh. */
+	struct rs485_control	rs485;
+#endif
+	int			port_type;
+};
+
+extern struct uart_driver serial_cris_driver;
+static struct uart_port *console_port;
+static int console_baud = 115200;
+static struct uart_cris_port serial_cris_ports[UART_NR] = {
+{
+#ifdef CONFIG_ETRAX_SERIAL_PORT0
+	.used        = 1,
+	.irq         = SER0_INTR_VECT,
+	.regi_ser    = regi_ser0,
+	/*
+	 * We initialize the dma stuff like this to get a compiler error
+	 * if a CONFIG is missing
+	 */
+	.regi_dmain  =
+#  ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA7_IN
+	               regi_dma7,
+#  endif
+#  ifdef CONFIG_ETRAX_SERIAL_PORT0_NO_DMA_IN
+	               regi_NULL,
+#  endif
+
+	.regi_dmaout =
+#  ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA6_OUT
+	               regi_dma6,
+#  endif
+#  ifdef CONFIG_ETRAX_SERIAL_PORT0_NO_DMA_OUT
+	               regi_NULL,
+#  endif
+
+#  ifdef CONFIG_ETRAX_RS485
+#    ifdef CONFIG_ETRAX_SERIAL_PORT0_TYPE_485HD
+	.port_type = TYPE_485HD,
+#    endif
+#    ifdef CONFIG_ETRAX_SERIAL_PORT0_TYPE_485FD
+	.port_type = TYPE_485FD,
+#    endif
+#  endif
+#else
+	.regi_ser    = regi_NULL,
+	.regi_dmain  = regi_NULL,
+	.regi_dmaout = regi_NULL,
+#endif
+},  /* ttyS0 */
+{
+#ifdef CONFIG_ETRAX_SERIAL_PORT1
+	.used        = 1,
+	.irq         = SER1_INTR_VECT,
+	.regi_ser    = regi_ser1,
+	.regi_dmain  =
+#  ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA5_IN
+	               regi_dma5,
+#  endif
+#  ifdef CONFIG_ETRAX_SERIAL_PORT1_NO_DMA_IN
+	               regi_NULL,
+#  endif
+
+	.regi_dmaout =
+#  ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA4_OUT
+	               regi_dma4,
+#  endif
+#  ifdef CONFIG_ETRAX_SERIAL_PORT1_NO_DMA_OUT
+	               regi_NULL,
+#  endif
+
+#  ifdef CONFIG_ETRAX_RS485
+#    ifdef CONFIG_ETRAX_SERIAL_PORT1_TYPE_485HD
+	.port_type = TYPE_485HD,
+#    endif
+#    ifdef CONFIG_ETRAX_SERIAL_PORT1_TYPE_485FD
+	.port_type = TYPE_485FD,
+#    endif
+#  endif
+#else
+	.regi_ser    = regi_NULL,
+	.regi_dmain  = regi_NULL,
+	.regi_dmaout = regi_NULL,
+#endif
+},  /* ttyS1 */
+{
+#ifdef CONFIG_ETRAX_SERIAL_PORT2
+	.used       = 1,
+	.irq        = SER2_INTR_VECT,
+	.regi_ser    = regi_ser2,
+	.regi_dmain  =
+#  ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA3_IN
+	               regi_dma3,
+#  endif
+#  ifdef CONFIG_ETRAX_SERIAL_PORT2_NO_DMA_IN
+	               regi_NULL,
+#  endif
+
+	 .regi_dmaout =
+#  ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA2_OUT
+	               regi_dma2,
+#  endif
+#  ifdef CONFIG_ETRAX_SERIAL_PORT2_NO_DMA_OUT
+	               regi_NULL,
+#  endif
+
+#  ifdef CONFIG_ETRAX_RS485
+#    ifdef CONFIG_ETRAX_SERIAL_PORT2_TYPE_485HD
+	.port_type = TYPE_485HD,
+#    endif
+#    ifdef CONFIG_ETRAX_SERIAL_PORT2_TYPE_485FD
+	.port_type = TYPE_485FD,
+#    endif
+#  endif
+#else
+	.regi_ser    = regi_NULL,
+	.regi_dmain  = regi_NULL,
+	.regi_dmaout = regi_NULL,
+#endif
+},  /* ttyS2 */
+{
+#ifdef CONFIG_ETRAX_SERIAL_PORT3
+	.used       = 1,
+	.irq        = SER3_INTR_VECT,
+	.regi_ser    = regi_ser3,
+	.regi_dmain  =
+#  ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA9_IN
+	               regi_dma9,
+#  endif
+#  ifdef CONFIG_ETRAX_SERIAL_PORT3_NO_DMA_IN
+	               regi_NULL,
+#  endif
+
+	 .regi_dmaout =
+#  ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA8_OUT
+	               regi_dma8,
+#  endif
+#  ifdef CONFIG_ETRAX_SERIAL_PORT3_NO_DMA_OUT
+	               regi_NULL,
+#  endif
+
+#  ifdef CONFIG_ETRAX_RS485
+#    ifdef CONFIG_ETRAX_SERIAL_PORT3_TYPE_485HD
+	.port_type = TYPE_485HD,
+#    endif
+#    ifdef CONFIG_ETRAX_SERIAL_PORT3_TYPE_485FD
+	.port_type = TYPE_485FD,
+#    endif
+#  endif
+#else
+	.regi_ser    = regi_NULL,
+	.regi_dmain  = regi_NULL,
+	.regi_dmaout = regi_NULL,
+#endif
+},  /* ttyS3 */
+{
+#ifdef CONFIG_ETRAX_DEBUG_PORT_NULL
+	.used        = 1,
+#endif
+	.regi_ser    = regi_NULL
+}   /* Dummy console port */
+
+};
+
+/* Dummy pin used for unused CD, DSR, DTR and RI signals. */
+static unsigned long io_dummy;
+static struct crisv32_ioport dummy_port =
+{
+	&io_dummy,
+	&io_dummy,
+	&io_dummy,
+	18
+};
+static struct crisv32_iopin dummy_pin =
+{
+	&dummy_port,
+	0
+};
+
+static int selected_console =
+#if defined(CONFIG_ETRAX_DEBUG_PORT0)
+0;
+#elif defined(CONFIG_ETRAX_DEBUG_PORT1)
+1;
+#elif defined(CONFIG_ETRAX_DEBUG_PORT2)
+2;
+#elif defined(CONFIG_ETRAX_DEBUG_PORT3)
+3;
+#else  /* CONFIG_ETRAX_DEBUG_PORT_NULL */
+4;
+#endif
+
+extern void reset_watchdog(void);
+
+/*
+ * Interrupts are disabled on entering
+ */
+static void
+cris_console_write(struct console *co, const char *s, unsigned int count)
+{
+	struct uart_cris_port *up;
+	int i;
+	reg_ser_r_stat_din stat;
+	reg_ser_rw_tr_dma_en tr_dma_en, old;
+
+	up = &serial_cris_ports[selected_console];
+
+	/*
+	 * This function isn't covered by the struct uart_ops, so we
+	 * have to check manually that the port really is there,
+	 * configured and live.
+	 */
+	if (!up->regi_ser)
+		return;
+
+	/* Switch to manual mode. */
+	tr_dma_en = old = REG_RD (ser, up->regi_ser, rw_tr_dma_en);
+	if (tr_dma_en.en == regk_ser_yes) {
+		tr_dma_en.en = regk_ser_no;
+		REG_WR(ser, up->regi_ser, rw_tr_dma_en, tr_dma_en);
+	}
+
+	/* Send data. */
+	for (i = 0; i < count; i++) {
+		/* LF -> CRLF */
+		if (s[i] == '\n') {
+			do {
+				stat = REG_RD (ser, up->regi_ser, r_stat_din);
+			} while (!stat.tr_rdy);
+			REG_WR_INT (ser, up->regi_ser, rw_dout, '\r');
+		}
+		/* Wait until transmitter is ready and send. */
+		do {
+			stat = REG_RD (ser, up->regi_ser, r_stat_din);
+		} while (!stat.tr_rdy);
+		REG_WR_INT (ser, up->regi_ser, rw_dout, s[i]);
+
+		/* Feed watchdog, because this may take looong time. */
+		reset_watchdog();
+	}
+
+	/* Restore mode. */
+	if (tr_dma_en.en != old.en)
+		REG_WR(ser, up->regi_ser, rw_tr_dma_en, old);
+}
+
+static void cris_serial_port_init(struct uart_port *port, int line);
+static int __init
+cris_console_setup(struct console *co, char *options)
+{
+	struct uart_port *port;
+	int baud = 115200;
+	int bits = 8;
+	int parity = 'n';
+	int flow = 'n';
+
+	if (co->index >= UART_NR)
+		co->index = 0;
+	if (options)
+		selected_console = co->index;
+	port = &serial_cris_ports[selected_console].port;
+        console_port = port;
+
+	if (options)
+		uart_parse_options(options, &baud, &parity, &bits, &flow);
+	console_baud = baud;
+	cris_serial_port_init(port, selected_console);
+	co->index = port->line;
+	uart_set_options(port, co, baud, parity, bits, flow);
+
+	return 0;
+}
+
+static struct tty_driver*
+cris_console_device(struct console* co, int *index)
+{
+	struct uart_driver *p = co->data;
+	*index = selected_console;
+	return p->tty_driver;
+}
+
+static struct console cris_console = {
+	.name		= "ttyS",
+	.write		= cris_console_write,
+	.device		= cris_console_device,
+	.setup		= cris_console_setup,
+	.flags		= CON_PRINTBUFFER,
+	.index		= -1,
+	.data		= &serial_cris_driver,
+};
+
+#define SERIAL_CRIS_CONSOLE	&cris_console
+
+struct uart_driver serial_cris_driver = {
+	.owner			= THIS_MODULE,
+	.driver_name		= "serial",
+	.dev_name		= "ttyS",
+	.major			= TTY_MAJOR,
+	.minor			= 64,
+	.nr			= UART_NR,
+	.cons			= SERIAL_CRIS_CONSOLE,
+};
+
+static int inline crisv32_serial_get_rts(struct uart_cris_port *up)
+{
+	reg_scope_instances regi_ser = up->regi_ser;
+	/*
+	 * Return what the user has controlled rts to or
+	 * what the pin is? (if auto_rts is used it differs during tx)
+	 */
+	reg_ser_r_stat_din rstat = REG_RD(ser, regi_ser, r_stat_din);
+	return !(rstat.rts_n == regk_ser_active);
+}
+
+/*
+ * A set = 0 means 3.3V on the pin, bitvalue: 0=active, 1=inactive
+ *                                            0=0V    , 1=3.3V
+ */
+static inline void crisv32_serial_set_rts(struct uart_cris_port *up, int set)
+{
+	reg_scope_instances regi_ser = up->regi_ser;
+
+#ifdef CONFIG_ETRAX_RS485
+	/* Never toggle RTS if port is in 485 mode. If port is in 485FD mode we
+	 * do not want to send with the reciever and for 485HD mode auto_rts
+	 * take care of the RTS for us. 
+	 */
+	if (!up->rs485.enabled) {
+#else
+	{
+#endif
+		unsigned long flags;
+		reg_ser_rw_rec_ctrl rec_ctrl;
+
+		local_irq_save(flags);
+		rec_ctrl = REG_RD(ser, regi_ser, rw_rec_ctrl);
+		if (set)
+			rec_ctrl.rts_n = regk_ser_active;
+		else
+			rec_ctrl.rts_n = regk_ser_inactive;
+		REG_WR(ser, regi_ser, rw_rec_ctrl, rec_ctrl);
+		local_irq_restore(flags);
+	}
+}
+
+/* Input */
+static int inline crisv32_serial_get_cts(struct uart_cris_port *up)
+{
+	reg_scope_instances regi_ser = up->regi_ser;
+	reg_ser_r_stat_din rstat = REG_RD(ser, regi_ser, r_stat_din);
+	return (rstat.cts_n == regk_ser_active);
+}
+
+/*
+ * Send a single character for XON/XOFF purposes.  We do it in this separate
+ * function instead of the alternative support port.x_char, in the ...start_tx
+ * function, so we don't mix up this case with possibly enabling transmission
+ * of queued-up data (in case that's disabled after *receiving* an XOFF or
+ * negative CTS).  This function is used for both DMA and non-DMA case; see HW
+ * docs specifically blessing sending characters manually when DMA for
+ * transmission is enabled and running.  We may be asked to transmit despite
+ * the transmitter being disabled by a ..._stop_tx call so we need to enable
+ * it temporarily but restore the state afterwards.
+ *
+ * Beware: I'm not sure how the RS-485 stuff is supposed to work.  Using
+ * XON/XOFF seems problematic if there are several controllers, but if it's
+ * actually RS-422 (multi-drop; one sender and multiple receivers), it might
+ * Just Work, so don't bail out just because it looks a little suspicious.
+ */
+
+void serial_cris_send_xchar(struct uart_port *port, char ch)
+{
+	struct uart_cris_port *up = (struct uart_cris_port *)port;
+	reg_ser_rw_dout dout = { .data = ch };
+	reg_ser_rw_ack_intr ack_intr = { .tr_rdy = regk_ser_yes };
+	reg_ser_r_stat_din rstat;
+	reg_ser_rw_tr_ctrl prev_tr_ctrl, tr_ctrl;
+	reg_scope_instances regi_ser = up->regi_ser;
+	unsigned long flags;
+
+	/*
+	 * Wait for tr_rdy in case a character is already being output.  Make
+	 * sure we have integrity between the register reads and the writes
+	 * below, but don't busy-wait with interrupts off and the port lock
+	 * taken.
+	 */
+	spin_lock_irqsave(&port->lock, flags);
+	do {
+		spin_unlock_irqrestore(&port->lock, flags);
+		spin_lock_irqsave(&port->lock, flags);
+		prev_tr_ctrl = tr_ctrl = REG_RD(ser, regi_ser, rw_tr_ctrl);
+		rstat = REG_RD(ser, regi_ser, r_stat_din);
+	} while (!rstat.tr_rdy);
+
+	/*
+	 * Ack an interrupt if one was just issued for the previous character
+	 * that was output.  This is required for non-DMA as the interrupt is
+	 * used as the only indicator that the transmitter is ready and it
+	 * isn't while this x_char is being transmitted.
+	 */
+	REG_WR(ser, regi_ser, rw_ack_intr, ack_intr);
+
+	/* Enable the transmitter in case it was disabled. */
+	tr_ctrl.stop = 0;
+	REG_WR(ser, regi_ser, rw_tr_ctrl, tr_ctrl);
+
+	/*
+	 * Finally, send the blessed character; nothing should stop it now,
+	 * except for an xoff-detected state, which we'll handle below.
+	 */
+	REG_WR(ser, regi_ser, rw_dout, dout);
+	up->port.icount.tx++;
+
+	/* There might be an xoff state to clear. */
+	rstat = REG_RD(ser, up->regi_ser, r_stat_din);
+
+	/*
+	 * Clear any xoff state that *may* have been there to
+	 * inhibit transmission of the character.
+	 */
+	if (rstat.xoff_detect) {
+		reg_ser_rw_xoff_clr xoff_clr = { .clr = 1 };
+		REG_WR(ser, regi_ser, rw_xoff_clr, xoff_clr);
+		reg_ser_rw_tr_dma_en tr_dma_en
+			= REG_RD(ser, regi_ser, rw_tr_dma_en);
+
+		/*
+		 * If we had an xoff state but cleared it, instead sneak in a
+		 * disabled state for the transmitter, after the character we
+		 * sent.  Thus we keep the port disabled, just as if the xoff
+		 * state was still in effect (or actually, as if stop_tx had
+		 * been called, as we stop DMA too).
+		 */
+		prev_tr_ctrl.stop = 1;
+
+		tr_dma_en.en = 0;
+		REG_WR(ser, regi_ser, rw_tr_dma_en, tr_dma_en);
+	}
+
+	/* Restore "previous" enabled/disabled state of the transmitter. */
+	REG_WR(ser, regi_ser, rw_tr_ctrl, prev_tr_ctrl);
+
+	spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static void transmit_chars_dma(struct uart_cris_port *up);
+
+/*
+ * Do not spin_lock_irqsave or disable interrupts by other means here; it's
+ * already done by the caller.
+ */
+
+static void serial_cris_start_tx(struct uart_port *port)
+{
+	struct uart_cris_port *up = (struct uart_cris_port *)port;
+	reg_scope_instances regi_ser = up->regi_ser;
+	reg_ser_rw_tr_ctrl tr_ctrl;
+
+	tr_ctrl = REG_RD(ser, regi_ser, rw_tr_ctrl);
+	tr_ctrl.stop = regk_ser_no;
+	REG_WR(ser, regi_ser, rw_tr_ctrl, tr_ctrl);
+	if (!up->regi_dmaout) {
+		reg_ser_rw_intr_mask intr_mask =
+			REG_RD(ser, regi_ser, rw_intr_mask);
+		intr_mask.tr_rdy = regk_ser_yes;
+		REG_WR(ser, regi_ser, rw_intr_mask, intr_mask);
+	} else {
+		/*
+		 * We're called possibly to re-enable transmission after it
+		 * has been disabled.  If so, DMA needs to be re-enabled.
+		 */
+		reg_ser_rw_tr_dma_en tr_dma_en = { .en = 1 };
+		REG_WR(ser, regi_ser, rw_tr_dma_en, tr_dma_en);
+		transmit_chars_dma(up);
+	}
+}
+
+/*
+ * This function handles both the DMA and non-DMA case by ordering the
+ * transmitter to stop of after the current character.  We don't need to wait
+ * for any such character to be completely transmitted; we do that where it
+ * matters, like in serial_cris_set_termios.  Don't busy-wait here; see
+ * Documentation/serial/driver: this function is called within
+ * spin_lock_irq{,save} and thus separate ones would be disastrous (when SMP).
+ * There's no documented need to set the txd pin to any particular value;
+ * break setting is controlled solely by serial_cris_break_ctl.
+ */
+
+static void serial_cris_stop_tx(struct uart_port *port)
+{
+	struct uart_cris_port *up = (struct uart_cris_port *)port;
+	reg_scope_instances regi_ser = up->regi_ser;
+	reg_ser_rw_tr_ctrl tr_ctrl;
+	reg_ser_rw_intr_mask intr_mask;
+	reg_ser_rw_tr_dma_en tr_dma_en = {0};
+	reg_ser_rw_xoff_clr xoff_clr = {0};
+
+	/*
+	 * For the non-DMA case, we'd get a tr_rdy interrupt that we're not
+	 * interested in as we're not transmitting any characters.  For the
+	 * DMA case, that interrupt is already turned off, but no reason to
+	 * waste code on conditionals here.
+	 */
+	intr_mask = REG_RD(ser, regi_ser, rw_intr_mask);
+	intr_mask.tr_rdy = regk_ser_no;
+	REG_WR(ser, regi_ser, rw_intr_mask, intr_mask);
+
+	tr_ctrl = REG_RD(ser, regi_ser, rw_tr_ctrl);
+	tr_ctrl.stop = 1;
+	REG_WR(ser, regi_ser, rw_tr_ctrl, tr_ctrl);
+
+	/*
+	 * Always clear possible hardware xoff-detected state here, no need to
+	 * unnecessary consider mctrl settings and when they change.  We clear
+	 * it here rather than in start_tx: both functions are called as the
+	 * effect of XOFF processing, but start_tx is also called when upper
+	 * levels tell the driver that there are more characters to send, so
+	 * avoid adding code there.
+	 */
+	xoff_clr.clr = 1;
+	REG_WR(ser, regi_ser, rw_xoff_clr, xoff_clr);
+
+	/*
+	 * Disable transmitter DMA, so that if we're in XON/XOFF, we can send
+	 * those single characters without also giving go-ahead for queued up
+	 * DMA data.
+	 */
+	tr_dma_en.en = 0;
+	REG_WR(ser, regi_ser, rw_tr_dma_en, tr_dma_en);
+}
+
+static void serial_cris_stop_rx(struct uart_port *port)
+{
+	struct uart_cris_port *up = (struct uart_cris_port *)port;
+	reg_scope_instances regi_ser = up->regi_ser;
+	reg_ser_rw_rec_ctrl rec_ctrl = REG_RD(ser, regi_ser, rw_rec_ctrl);
+
+	rec_ctrl.en = regk_ser_no;
+	REG_WR(ser, regi_ser, rw_rec_ctrl, rec_ctrl);
+}
+
+static void serial_cris_enable_ms(struct uart_port *port)
+{
+}
+
+static void check_modem_status(struct uart_cris_port *up)
+{
+}
+
+static unsigned int serial_cris_tx_empty(struct uart_port *port)
+{
+	struct uart_cris_port *up = (struct uart_cris_port *)port;
+	unsigned long flags;
+	unsigned int ret;
+	reg_ser_r_stat_din rstat = {0};
+
+	spin_lock_irqsave(&up->port.lock, flags);
+	if (up->regi_dmaout) {
+		/*
+		 * For DMA, before looking at r_stat, we need to check that we
+		 * either haven't actually started or that end-of-list is
+		 * reached, else a tr_empty indication is just an internal
+		 * state.  The caller qualifies, if needed, that the
+		 * port->info.xmit buffer is empty, so we don't need to
+		 * check that.
+		 */
+		reg_dma_rw_stat status = REG_RD(dma, up->regi_dmaout, rw_stat);
+
+		if (!up->tx_started) {
+			ret = 1;
+			goto done;
+		}
+
+		if (status.list_state != regk_dma_data_at_eol) {
+			ret = 0;
+			goto done;
+		}
+	}
+
+	rstat = REG_RD(ser, up->regi_ser, r_stat_din);
+	ret = rstat.tr_empty ? TIOCSER_TEMT : 0;
+
+ done:
+	spin_unlock_irqrestore(&up->port.lock, flags);
+	return ret;
+}
+static unsigned int serial_cris_get_mctrl(struct uart_port *port)
+{
+	struct uart_cris_port *up = (struct uart_cris_port *)port;
+	unsigned int ret;
+
+	ret = 0;
+        if (crisv32_serial_get_rts(up))
+		ret |= TIOCM_RTS;
+	if (crisv32_io_rd(&up->dtr_pin))
+		ret |= TIOCM_DTR;
+	if (crisv32_io_rd(&up->cd_pin))
+		ret |= TIOCM_CD;
+	if (crisv32_io_rd(&up->ri_pin))
+		ret |= TIOCM_RI;
+	if (!crisv32_io_rd(&up->dsr_pin))
+		ret |= TIOCM_DSR;
+	if (crisv32_serial_get_cts(up))
+		ret |= TIOCM_CTS;
+	return ret;
+}
+
+static void serial_cris_set_mctrl(struct uart_port *port, unsigned int mctrl)
+{
+	struct uart_cris_port *up = (struct uart_cris_port *)port;
+
+	crisv32_serial_set_rts(up, mctrl & TIOCM_RTS ? 1 : 0);
+	crisv32_io_set(&up->dtr_pin, mctrl & TIOCM_DTR ? 1 : 0);
+	crisv32_io_set(&up->ri_pin, mctrl & TIOCM_RNG ? 1 : 0);
+	crisv32_io_set(&up->cd_pin, mctrl & TIOCM_CD ? 1 : 0);
+}
+
+static void serial_cris_break_ctl(struct uart_port *port, int break_state)
+{
+	struct uart_cris_port *up = (struct uart_cris_port *)port;
+	unsigned long flags;
+	reg_ser_rw_tr_ctrl tr_ctrl;
+	reg_ser_rw_tr_dma_en tr_dma_en;
+	reg_ser_rw_intr_mask intr_mask;
+
+	spin_lock_irqsave(&up->port.lock, flags);
+	tr_ctrl = REG_RD(ser, up->regi_ser, rw_tr_ctrl);
+	tr_dma_en = REG_RD(ser, up->regi_ser, rw_tr_dma_en);
+	intr_mask = REG_RD(ser, up->regi_ser, rw_intr_mask);
+
+	if (break_state != 0) { /* Send break */
+		/*
+		 * We need to disable DMA (if used) or tr_rdy interrupts if no
+		 * DMA.  No need to make this conditional on use of DMA;
+		 * disabling will be a no-op for the other mode.
+		 */
+		intr_mask.tr_rdy = regk_ser_no;
+		tr_dma_en.en = 0;
+
+		/*
+		 * Stop transmission and set the txd pin to 0 after the
+		 * current character.  The txd setting will take effect after
+		 * any current transmission has completed.
+		 */
+		tr_ctrl.stop = 1;
+		tr_ctrl.txd = 0;
+	} else {
+		/* Re-enable either transmit DMA or the serial interrupt. */
+		if (up->regi_dmaout)
+			tr_dma_en.en = 1;
+		else
+			intr_mask.tr_rdy = regk_ser_yes;
+
+
+		tr_ctrl.stop = 0;
+		tr_ctrl.txd = 1;
+	}
+	REG_WR(ser, up->regi_ser, rw_tr_ctrl, tr_ctrl);
+	REG_WR(ser, up->regi_ser, rw_tr_dma_en, tr_dma_en);
+	REG_WR(ser, up->regi_ser, rw_intr_mask, intr_mask);
+
+	spin_unlock_irqrestore(&up->port.lock, flags);
+}
+
+/*
+ * The output DMA channel is free - use it to send as many chars as
+ * possible.
+ */
+
+static void
+transmit_chars_dma(struct uart_cris_port *up)
+{
+	struct dma_descr_data *descr, *pending_descr, *dmapos;
+	struct dma_descr_data *last_tx_descr;
+	struct circ_buf *xmit = &up->port.info->xmit;
+	unsigned int sentl = 0;
+	reg_dma_rw_ack_intr ack_intr = { .data = regk_dma_yes };
+	reg_dma_rw_stat status;
+	reg_scope_instances regi_dmaout = up->regi_dmaout;
+	unsigned int chars_in_q;
+	unsigned int chars_to_send;
+
+	/* Acknowledge dma data descriptor irq, if there was one. */
+	REG_WR(dma, regi_dmaout, rw_ack_intr, ack_intr);
+
+	/*
+	 * First get the amount of bytes sent during the last DMA transfer,
+	 * and update xmit accordingly.
+	 */
+	status = REG_RD(dma, regi_dmaout, rw_stat);
+	if (status.list_state == regk_dma_data_at_eol || !up->tx_started)
+		dmapos = phys_to_virt((int)up->last_tx_descr->next);
+	else
+		dmapos = phys_to_virt(REG_RD_INT(dma, regi_dmaout, rw_data));
+
+	pending_descr = up->first_tx_descr;
+	while (pending_descr != dmapos) {
+		sentl += pending_descr->after - pending_descr->buf;
+		pending_descr->after = pending_descr->buf = NULL;
+		pending_descr = phys_to_virt((int)pending_descr->next);
+        }
+
+	up->first_tx_descr = pending_descr;
+	last_tx_descr = up->last_tx_descr;
+
+	/* Update stats. */
+	up->port.icount.tx += sentl;
+
+	up->tx_pending_chars -= sentl;
+
+	/* Update xmit buffer. */
+	xmit->tail = (xmit->tail + sentl) & (UART_XMIT_SIZE - 1);
+
+	/*
+	 * Find out the largest amount of consecutive bytes we want to send
+	 * now.
+	 */
+	chars_in_q = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE);
+
+	if (chars_in_q == 0)
+		/* Tell upper layers that we're now idle. */
+		goto done;
+
+	/* Some of those characters are actually pending output. */
+	chars_to_send = chars_in_q - up->tx_pending_chars;
+
+	/*
+	 * Clamp the new number of pending chars to the advertised
+	 * one.
+	 */
+	if (chars_to_send + up->tx_pending_chars > up->port.fifosize)
+		chars_to_send = up->port.fifosize - up->tx_pending_chars;
+
+	/* If we don't want to send any, we're done. */
+	if (chars_to_send == 0)
+		goto done;
+
+	descr = phys_to_virt((int)last_tx_descr->next);
+
+	/*
+	 * We can't send anything if we could make the condition in
+	 * the while-loop above (reaping finished descriptors) be met
+	 * immediately before the first iteration.  However, don't
+	 * mistake the full state for the empty state.
+	 */
+	if ((descr == up->first_tx_descr && up->tx_pending_chars != 0)
+	    || descr->next == up->first_tx_descr)
+		goto done;
+
+	/* Set up the descriptor for output. */
+	descr->buf = (void*)virt_to_phys(xmit->buf + xmit->tail
+					 + up->tx_pending_chars);
+	descr->after = descr->buf + chars_to_send;
+	descr->eol = 1;
+	descr->out_eop = 0;
+	descr->intr = 1;
+	descr->wait = 0;
+	descr->in_eop = 0;
+	descr->md = 0;
+	/*
+	 * Make sure GCC doesn't move this eol clear before the eol set
+	 * above.
+	 */
+	barrier();
+	last_tx_descr->eol = 0;
+
+	up->last_tx_descr = descr;
+	up->tx_pending_chars += chars_to_send;
+
+	if (!up->tx_started) {
+		up->tx_started = 1;
+		up->tr_context_descr.next = 0;
+		up->tr_context_descr.saved_data
+			= (dma_descr_data*)virt_to_phys(descr);
+		up->tr_context_descr.saved_data_buf = descr->buf;
+		DMA_START_CONTEXT(regi_dmaout,
+				  virt_to_phys(&up->tr_context_descr));
+        } else
+		DMA_CONTINUE_DATA(regi_dmaout);
+
+	/* DMA is now running (hopefully). */
+
+ done:
+	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+		uart_write_wakeup(&up->port);
+}
+
+static void
+transmit_chars_no_dma(struct uart_cris_port *up)
+{
+	int count;
+	struct circ_buf *xmit = &up->port.info->xmit;
+
+	reg_scope_instances regi_ser = up->regi_ser;
+	reg_ser_r_stat_din rstat;
+	reg_ser_rw_ack_intr ack_intr = { .tr_rdy = regk_ser_yes };
+
+	if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
+		/* No more to send, so disable the interrupt. */
+		reg_ser_rw_intr_mask intr_mask;
+		intr_mask = REG_RD(ser, regi_ser, rw_intr_mask);
+		intr_mask.tr_rdy = 0;
+		intr_mask.tr_empty = 0;
+		REG_WR(ser, regi_ser, rw_intr_mask, intr_mask);
+		return;
+	}
+
+	count = ETRAX_SER_FIFO_SIZE;
+	do {
+		reg_ser_rw_dout dout = { .data = xmit->buf[xmit->tail] };
+		REG_WR(ser, regi_ser, rw_dout, dout);
+		REG_WR(ser, regi_ser, rw_ack_intr, ack_intr);
+		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE-1);
+		up->port.icount.tx++;
+		if (xmit->head == xmit->tail)
+			break;
+		rstat = REG_RD(ser, regi_ser, r_stat_din);
+	} while ((--count > 0) && rstat.tr_rdy);
+
+	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+		uart_write_wakeup(&up->port);
+} /* transmit_chars_no_dma */
+
+static struct etrax_recv_buffer *
+alloc_recv_buffer(unsigned int size)
+{
+	struct etrax_recv_buffer *buffer;
+
+	if (!(buffer = kmalloc(sizeof *buffer + size, GFP_ATOMIC)))
+		panic("%s: Could not allocate %d bytes buffer\n",
+		      __FUNCTION__, size);
+
+	buffer->next = NULL;
+	buffer->length = 0;
+	buffer->error = TTY_NORMAL;
+
+	return buffer;
+}
+
+static void
+append_recv_buffer(struct uart_cris_port *up,
+		   struct etrax_recv_buffer *buffer)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+
+	if (!up->first_recv_buffer)
+		up->first_recv_buffer = buffer;
+	else
+		up->last_recv_buffer->next = buffer;
+
+	up->last_recv_buffer = buffer;
+
+	up->recv_cnt += buffer->length;
+	if (up->recv_cnt > up->max_recv_cnt)
+		up->max_recv_cnt = up->recv_cnt;
+
+	local_irq_restore(flags);
+}
+
+static int
+add_char_and_flag(struct uart_cris_port *up, unsigned char data,
+		  unsigned char flag)
+{
+	struct etrax_recv_buffer *buffer;
+
+	buffer = alloc_recv_buffer(4);
+	buffer->length = 1;
+	buffer->error = flag;
+	buffer->buffer[0] = data;
+
+	append_recv_buffer(up, buffer);
+
+	up->port.icount.rx++;
+
+	return 1;
+}
+
+static void
+flush_to_flip_buffer(struct uart_cris_port *up)
+{
+	struct tty_struct *tty;
+	struct etrax_recv_buffer *buffer;
+
+	tty = up->port.info->tty;
+	if (!up->first_recv_buffer || !tty)
+		return;
+
+	while ((buffer = up->first_recv_buffer)) {
+		unsigned int count = (unsigned int)
+			tty_insert_flip_string(tty, buffer->buffer,
+					       buffer->length);
+
+		up->recv_cnt -= count;
+
+		if (count == buffer->length) {
+			up->first_recv_buffer = buffer->next;
+			kfree(buffer);
+		} else {
+			buffer->length -= count;
+			memmove(buffer->buffer, buffer->buffer + count,
+				buffer->length);
+			buffer->error = TTY_NORMAL;
+		}
+	}
+
+	if (!up->first_recv_buffer)
+		up->last_recv_buffer = NULL;
+
+	/* This call includes a check for low-latency. */
+	tty_flip_buffer_push(tty);
+}
+
+static unsigned int
+handle_descr_data(struct uart_cris_port *up, struct dma_descr_data *descr,
+		  unsigned int recvl)
+{
+	struct etrax_recv_buffer *buffer
+		= phys_to_virt((unsigned long)descr->buf) - sizeof *buffer;
+
+	if (up->recv_cnt + recvl > 65536) {
+		printk(KERN_ERR "Too much pending incoming data on %s!"
+		       " Dropping %u bytes.\n", up->port.info->tty->name,
+		       recvl);
+		return 0;
+	}
+
+	buffer->length = recvl;
+
+	append_recv_buffer(up, buffer);
+
+	flush_to_flip_buffer(up);
+
+	buffer = alloc_recv_buffer(SERIAL_DESCR_BUF_SIZE);
+	descr->buf = (void*)virt_to_phys(buffer->buffer);
+	descr->after = descr->buf + SERIAL_DESCR_BUF_SIZE;
+
+	return recvl;
+}
+
+static unsigned int
+handle_all_descr_data(struct uart_cris_port *up)
+{
+	struct dma_descr_data *descr
+		 = &up->rec_descr[(up->cur_rec_descr - 1)
+				  % SERIAL_RECV_DESCRIPTORS];
+	struct dma_descr_data *prev_descr;
+	unsigned int recvl;
+	unsigned int ret = 0;
+	reg_scope_instances regi_dmain = up->regi_dmain;
+
+	while (1) {
+		prev_descr = descr;
+		descr = &up->rec_descr[up->cur_rec_descr];
+
+		if (descr == phys_to_virt(REG_RD(dma, regi_dmain, rw_data)))
+			break;
+
+		if (++up->cur_rec_descr == SERIAL_RECV_DESCRIPTORS)
+			up->cur_rec_descr = 0;
+
+		/* Find out how many bytes were read. */
+		recvl = descr->after - descr->buf;
+
+		/* Update stats. */
+		up->port.icount.rx += recvl;
+
+		ret += handle_descr_data(up, descr, recvl);
+		descr->eol = 1;
+		/*
+		 * Make sure GCC doesn't move this eol clear before the
+		 * eol set above.
+		 */
+		barrier();
+		prev_descr->eol = 0;
+		flush_dma_descr(descr,1); // Cache bug workaround
+		flush_dma_descr(prev_descr,0); // Cache bug workaround
+	}
+
+	return ret;
+}
+
+static void
+receive_chars_dma(struct uart_cris_port *up)
+{
+	reg_ser_r_stat_din rstat;
+	reg_dma_rw_ack_intr ack_intr = {0};
+
+	/* Acknowledge both dma_descr and dma_eop irq. */
+	ack_intr.data = 1;
+	ack_intr.in_eop = 1;
+	REG_WR(dma, up->regi_dmain, rw_ack_intr, ack_intr);
+
+	handle_all_descr_data(up);
+
+	/* Read the status register to detect errors. */
+	rstat = REG_RD(ser, up->regi_ser, r_stat_din);
+
+	if (rstat.framing_err | rstat.par_err | rstat.orun) {
+		/*
+		 * If we got an error, we must reset it by reading the
+		 * rs_stat_din register and put the data in buffer manually.
+		 */
+		reg_ser_rs_stat_din stat_din;
+                stat_din = REG_RD(ser, up->regi_ser, rs_stat_din);
+
+		if (stat_din.par_err)
+			add_char_and_flag(up, stat_din.data, TTY_PARITY);
+		else if (stat_din.orun)
+			add_char_and_flag(up, stat_din.data, TTY_OVERRUN);
+		else if (stat_din.framing_err)
+			add_char_and_flag(up, stat_din.data, TTY_FRAME);
+	}
+
+	/* Restart the receiving DMA, in case it got stuck on an EOL. */
+	DMA_CONTINUE_DATA(up->regi_dmain);
+}
+
+void receive_chars_no_dma(struct uart_cris_port *up)
+{
+	reg_ser_rs_stat_din stat_din;
+	reg_ser_r_stat_din rstat;
+	struct tty_struct *tty;
+	struct uart_icount *icount;
+	int max_count = 16;
+	char flag;
+	reg_ser_rw_ack_intr ack_intr = { 0 };
+
+	rstat = REG_RD(ser, up->regi_ser, r_stat_din);
+	up->last_rx_active_usec = GET_JIFFIES_USEC();
+	up->last_rx_active = jiffies;
+	icount = &up->port.icount;
+	tty = up->port.info->tty;
+
+	do {
+		stat_din = REG_RD(ser, up->regi_ser, rs_stat_din);
+
+		flag = TTY_NORMAL;
+		ack_intr.dav = 1;
+		REG_WR(ser, up->regi_ser, rw_ack_intr, ack_intr);
+		icount->rx++;
+
+		if (stat_din.framing_err | stat_din.par_err | stat_din.orun) {
+			if (stat_din.data == 0x00 &&
+                            stat_din.framing_err) {
+				/* Most likely a break. */
+				flag = TTY_BREAK;
+				icount->brk++;
+			} else if (stat_din.par_err) {
+			        flag = TTY_PARITY;
+				icount->parity++;
+			} else if (stat_din.orun) {
+				flag = TTY_OVERRUN;
+				icount->overrun++;
+			} else if (stat_din.framing_err) {
+				flag = TTY_FRAME;
+				icount->frame++;
+			}
+		}
+
+		/*
+		 * If this becomes important, we probably *could* handle this
+		 * gracefully by keeping track of the unhandled character.
+		 */
+                if (!tty_insert_flip_char(tty, stat_din.data, flag))
+			panic("%s: No tty buffer space", __FUNCTION__);
+		rstat = REG_RD(ser, up->regi_ser, r_stat_din);
+	} while (rstat.dav && (max_count-- > 0));
+	spin_unlock(&up->port.lock);
+	tty_flip_buffer_push(tty);
+	spin_lock(&up->port.lock);
+} /* receive_chars_no_dma */
+
+/*
+ * DMA output channel interrupt handler.
+ * this interrupt is called from DMA2(ser2), DMA8(ser3), DMA6(ser0) or
+ * DMA4(ser1) when they have finished a descriptor with the intr flag set.
+ */
+
+static irqreturn_t
+dma_tr_interrupt(int irq, void *dev_id, struct pt_regs * regs)
+{
+	struct uart_cris_port *up = (struct uart_cris_port *)dev_id;
+	reg_dma_r_masked_intr masked_intr;
+	reg_scope_instances regi_dmaout;
+	int handled = 0;
+
+	spin_lock(&up->port.lock);
+	regi_dmaout = up->regi_dmaout;
+	if (!regi_dmaout) {
+		spin_unlock(&up->port.lock);
+		return IRQ_NONE;
+	}
+
+	/*
+	 * Check for dma_descr (don't need to check for dma_eop in
+	 * output DMA for serial).
+	 */
+	masked_intr = REG_RD(dma, regi_dmaout, r_masked_intr);
+
+	if (masked_intr.data) {
+		/* We can send a new dma bunch. make it so. */
+
+		/*
+		 * Read jiffies_usec first.
+		 * We want this time to be as late as possible.
+		 */
+		up->last_tx_active_usec = GET_JIFFIES_USEC();
+		up->last_tx_active = jiffies;
+		transmit_chars_dma(up);
+		handled = 1;
+	}
+	check_modem_status(up);
+	spin_unlock(&up->port.lock);
+	return IRQ_RETVAL(handled);
+}
+
+/* DMA input channel interrupt handler. */
+
+static irqreturn_t
+dma_rec_interrupt(int irq, void *dev_id, struct pt_regs * regs)
+{
+	struct uart_cris_port *up = (struct uart_cris_port *)dev_id;
+	reg_dma_r_masked_intr masked_intr;
+	reg_scope_instances regi_dmain;
+	int handled = 0;
+
+	spin_lock(&up->port.lock);
+	regi_dmain = up->regi_dmain;
+	if (!regi_dmain) {
+		spin_unlock(&up->port.lock);
+		return IRQ_NONE;
+	}
+
+	/* Check for both dma_eop and dma_descr for the input dma channel. */
+	masked_intr = REG_RD(dma, regi_dmain, r_masked_intr);
+	if (masked_intr.data || masked_intr.in_eop) {
+		/* We have received something. */
+		receive_chars_dma(up);
+		handled = 1;
+	}
+	check_modem_status(up);
+	spin_unlock(&up->port.lock);
+	return IRQ_RETVAL(handled);
+}
+
+/* "Normal" serial port interrupt handler - both rx and tx. */
+
+static irqreturn_t
+ser_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct uart_cris_port *up = (struct uart_cris_port *)dev_id;
+	reg_scope_instances regi_ser;
+	int handled = 0;
+
+	spin_lock(&up->port.lock);
+	if (up->regi_dmain && up->regi_dmaout) {
+		spin_unlock(&up->port.lock);
+		return IRQ_NONE;
+	}
+
+	regi_ser = up->regi_ser;
+
+	if (regi_ser) {
+		reg_ser_r_masked_intr masked_intr;
+		masked_intr = REG_RD(ser, regi_ser, r_masked_intr);
+		/*
+		 * Check what interrupts are active before taking
+		 * actions. If DMA is used the interrupt shouldn't
+		 * be enabled.
+		 */
+		if (masked_intr.dav) {
+			receive_chars_no_dma(up);
+			handled = 1;
+		}
+		check_modem_status(up);
+
+		if (masked_intr.tr_rdy) {
+			transmit_chars_no_dma(up);
+			handled = 1;
+		}
+	}
+	spin_unlock(&up->port.lock);
+	return IRQ_RETVAL(handled);
+} /* ser_interrupt */
+
+static int start_recv_dma(struct uart_cris_port *up)
+{
+	struct dma_descr_data *descr = up->rec_descr;
+	struct etrax_recv_buffer *buffer;
+	int i;
+
+	/* Set up the receiving descriptors. */
+	for (i = 0; i < SERIAL_RECV_DESCRIPTORS; i++) {
+		buffer = alloc_recv_buffer(SERIAL_DESCR_BUF_SIZE);
+		descr[i].next = (void*)virt_to_phys(&descr[i+1]);
+		descr[i].buf = (void*)virt_to_phys(buffer->buffer);
+		descr[i].after = descr[i].buf + SERIAL_DESCR_BUF_SIZE;
+		descr[i].eol = 0;
+		descr[i].out_eop = 0;
+		descr[i].intr = 1;
+		descr[i].wait = 0;
+		descr[i].in_eop = 0;
+		descr[i].md = 0;
+
+	}
+
+	/* Link the last descriptor to the first. */
+	descr[i-1].next = (void*)virt_to_phys(&descr[0]);
+
+	/* And mark it as end of list. */
+	descr[i-1].eol = 1;
+
+	/* Start with the first descriptor in the list. */
+	up->cur_rec_descr = 0;
+	up->rec_context_descr.next = 0;
+	up->rec_context_descr.saved_data
+		= (dma_descr_data *)virt_to_phys(&descr[up->cur_rec_descr]);
+	up->rec_context_descr.saved_data_buf = descr[up->cur_rec_descr].buf;
+
+	/* Start the DMA. */
+	DMA_START_CONTEXT(up->regi_dmain,
+			  virt_to_phys(&up->rec_context_descr));
+
+	/* Input DMA should be running now. */
+	return 1;
+}
+
+
+static void start_receive(struct uart_cris_port *up)
+{
+	reg_scope_instances regi_dmain = up->regi_dmain;
+	if (regi_dmain) {
+		start_recv_dma(up);
+	}
+}
+
+
+static void start_transmitter(struct uart_cris_port *up)
+{
+	int i;
+	reg_scope_instances regi_dmaout = up->regi_dmaout;
+	if (regi_dmaout) {
+		for (i = 0; i < SERIAL_TX_DESCRIPTORS; i++) {
+			memset(&up->tr_descr[i], 0, sizeof(up->tr_descr[i]));
+			up->tr_descr[i].eol = 1;
+			up->tr_descr[i].intr = 1;
+			up->tr_descr[i].next = (dma_descr_data *)
+				virt_to_phys(&up->tr_descr[i+1]);
+		}
+		up->tr_descr[i-1].next = (dma_descr_data *)
+			virt_to_phys(&up->tr_descr[0]);
+		up->first_tx_descr = &up->tr_descr[0];
+
+		/*
+		 * We'll be counting up to up->last_tx_descr->next from
+		 * up->first_tx_descr when starting DMA, so we should make
+		 * them the same for the very first round.  If instead we'd
+		 * set last_tx_descr = first_tx_descr, we'd rely on
+		 * accidentally working code and data as we'd take a pass over
+		 * the first, unused, descriptor.
+		 */
+		up->last_tx_descr = &up->tr_descr[i-1];
+		up->tx_started = 0;
+		up->tx_pending_chars = 0;
+	}
+}
+
+static int serial_cris_startup(struct uart_port *port)
+{
+	struct uart_cris_port *up = (struct uart_cris_port *)port;
+	unsigned long flags;
+	reg_intr_vect_rw_mask intr_mask;
+	reg_ser_rw_intr_mask ser_intr_mask = {0};
+	reg_dma_rw_intr_mask dmain_intr_mask = {0};
+	reg_dma_rw_intr_mask dmaout_intr_mask = {0};
+	reg_dma_rw_cfg cfg = {.en = 1};
+	reg_scope_instances regi_dma;
+
+	spin_lock_irqsave(&up->port.lock, flags);
+
+	intr_mask = REG_RD(intr_vect, regi_irq, rw_mask);
+
+	dmain_intr_mask.data = dmain_intr_mask.in_eop = regk_dma_yes;
+	dmaout_intr_mask.data = regk_dma_yes;
+	if (!up->regi_dmain)
+		ser_intr_mask.dav = regk_ser_yes;
+
+	if (port->line == 0) {
+		if (request_irq(SER0_INTR_VECT, ser_interrupt,
+				IRQF_SHARED | IRQF_DISABLED, "ser0",
+				&serial_cris_ports[0]))
+			panic("irq ser0");
+		/* Enable the ser0 irq in global config. */
+		intr_mask.ser0 = 1;
+		/* Port ser0 can use dma6 for tx and dma7 for rx. */
+#ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA6_OUT
+		if (request_irq(DMA6_INTR_VECT, dma_tr_interrupt,
+				IRQF_DISABLED, "serial 0 dma tr",
+				&serial_cris_ports[0]))
+			panic("irq ser0txdma");
+		crisv32_request_dma(6, "ser0", DMA_PANIC_ON_ERROR, 0,
+				    dma_ser0);
+		/* Enable the dma6 irq in global config. */
+		intr_mask.dma6 = 1;
+#endif
+#ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA7_IN
+		if (request_irq(DMA7_INTR_VECT, dma_rec_interrupt,
+				IRQF_DISABLED, "serial 0 dma rec",
+				&serial_cris_ports[0]))
+			panic("irq ser0rxdma");
+		crisv32_request_dma(7, "ser0", DMA_PANIC_ON_ERROR, 0,
+				    dma_ser0);
+		/* Enable the dma7 irq in global config. */
+		intr_mask.dma7 = 1;
+#endif
+	} else if (port->line == 1) {
+		if (request_irq(SER1_INTR_VECT, ser_interrupt,
+				IRQF_SHARED | IRQF_DISABLED, "ser1",
+				&serial_cris_ports[1]))
+			panic("irq ser1");
+		/* Enable the ser1 irq in global config. */
+		intr_mask.ser1 = 1;
+
+		/* Port ser1 can use dma4 for tx and dma5 for rx. */
+#ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA4_OUT
+		if (request_irq(DMA4_INTR_VECT, dma_tr_interrupt,
+				IRQF_DISABLED, "serial 1 dma tr",
+				&serial_cris_ports[1]))
+			panic("irq ser1txdma");
+		crisv32_request_dma(4, "ser1", DMA_PANIC_ON_ERROR, 0,
+				    dma_ser1);
+		/* Enable the dma4 irq in global config. */
+		intr_mask.dma4 = 1;
+#endif
+#ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA5_IN
+		if (request_irq(DMA5_INTR_VECT, dma_rec_interrupt,
+				IRQF_DISABLED, "serial 1 dma rec",
+				&serial_cris_ports[1]))
+			panic("irq ser1rxdma");
+		crisv32_request_dma(5, "ser1", DMA_PANIC_ON_ERROR, 0,
+				    dma_ser1);
+		/* Enable the dma5 irq in global config. */
+		intr_mask.dma5 = 1;
+#endif
+	} else if (port->line == 2) {
+		if (request_irq(SER2_INTR_VECT, ser_interrupt,
+				IRQF_SHARED | IRQF_DISABLED, "ser2",
+				&serial_cris_ports[2]))
+			panic("irq ser2");
+		/* Enable the ser2 irq in global config. */
+		intr_mask.ser2 = 1;
+
+		/* Port ser2 can use dma2 for tx and dma3 for rx. */
+#ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA2_OUT
+		if (request_irq(DMA2_INTR_VECT, dma_tr_interrupt,
+				IRQF_DISABLED, "serial 2 dma tr",
+				&serial_cris_ports[2]))
+			panic("irq ser2txdma");
+		crisv32_request_dma(2, "ser2", DMA_PANIC_ON_ERROR, 0,
+				    dma_ser2);
+		/* Enable the dma2 irq in global config. */
+		intr_mask.dma2 = 1;
+#endif
+#ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA3_IN
+		if (request_irq(DMA3_INTR_VECT, dma_rec_interrupt,
+				IRQF_DISABLED, "serial 2 dma rec",
+				&serial_cris_ports[2]))
+			panic("irq ser2rxdma");
+		crisv32_request_dma(3, "ser2", DMA_PANIC_ON_ERROR, 0,
+				    dma_ser2);
+		/* Enable the dma3 irq in global config. */
+		intr_mask.dma3 = 1;
+#endif
+	} else if (port->line == 3) {
+		if (request_irq(SER3_INTR_VECT, ser_interrupt,
+				IRQF_SHARED | IRQF_DISABLED, "ser3",
+				&serial_cris_ports[3]))
+			panic("irq ser3" );
+		/* Enable the ser3 irq in global config. */
+		intr_mask.ser3 = 1;
+
+		/* Port ser3 can use dma8 for tx and dma9 for rx. */
+#ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA8_OUT
+		if (request_irq(DMA8_INTR_VECT, dma_tr_interrupt,
+				IRQF_DISABLED, "serial 3 dma tr",
+				&serial_cris_ports[3]))
+			panic("irq ser3txdma");
+		crisv32_request_dma(8, "ser3", DMA_PANIC_ON_ERROR, 0,
+				    dma_ser3);
+		/* Enable the dma2 irq in global config. */
+		intr_mask.dma8 = 1;
+#endif
+#ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA9_IN
+		if (request_irq(DMA9_INTR_VECT, dma_rec_interrupt,
+				IRQF_DISABLED, "serial 3 dma rec",
+				&serial_cris_ports[3]))
+			panic("irq ser3rxdma");
+		crisv32_request_dma(9, "ser3", DMA_PANIC_ON_ERROR, 0,
+				    dma_ser3);
+		/* Enable the dma3 irq in global config. */
+		intr_mask.dma9 = 1;
+#endif
+	}
+
+	/*
+	 * Reset the DMA channels and make sure their interrupts are cleared.
+	 */
+
+	regi_dma = up->regi_dmain;
+	if (regi_dma) {
+		reg_dma_rw_ack_intr ack_intr = { 0 };
+		DMA_RESET(regi_dma);
+		/* Wait until reset cycle is complete. */
+		DMA_WAIT_UNTIL_RESET(regi_dma);
+		REG_WR(dma, regi_dma, rw_cfg, cfg);
+		/* Make sure the irqs are cleared. */
+		ack_intr.group = 1;
+		ack_intr.ctxt = 1;
+		ack_intr.data = 1;
+		ack_intr.in_eop = 1;
+		ack_intr.stream_cmd = 1;
+		REG_WR(dma, regi_dma, rw_ack_intr, ack_intr);
+	}
+	regi_dma = up->regi_dmaout;
+	if (regi_dma) {
+		reg_dma_rw_ack_intr ack_intr = { 0 };
+		DMA_RESET(regi_dma);
+		/* Wait until reset cycle is complete. */
+		DMA_WAIT_UNTIL_RESET(regi_dma);
+		REG_WR(dma, regi_dma, rw_cfg, cfg);
+		/* Make sure the irqs are cleared. */
+		ack_intr.group = 1;
+		ack_intr.ctxt = 1;
+		ack_intr.data = 1;
+		ack_intr.in_eop = 1;
+		ack_intr.stream_cmd = 1;
+		REG_WR(dma, regi_dma, rw_ack_intr, ack_intr);
+	}
+
+	REG_WR(intr_vect, regi_irq, rw_mask, intr_mask);
+	REG_WR(ser, up->regi_ser, rw_intr_mask, ser_intr_mask);
+	if (up->regi_dmain)
+		REG_WR(dma, up->regi_dmain, rw_intr_mask, dmain_intr_mask);
+	if (up->regi_dmaout)
+		REG_WR(dma, up->regi_dmaout, rw_intr_mask, dmaout_intr_mask);
+
+	start_receive(up);
+	start_transmitter(up);
+
+	serial_cris_set_mctrl(&up->port, up->port.mctrl);
+	spin_unlock_irqrestore(&up->port.lock, flags);
+
+	return 0;
+}
+
+static void serial_cris_shutdown(struct uart_port *port)
+{
+	struct uart_cris_port *up = (struct uart_cris_port *)port;
+	unsigned long flags;
+	reg_intr_vect_rw_mask intr_mask;
+
+	spin_lock_irqsave(&up->port.lock, flags);
+
+	intr_mask = REG_RD(intr_vect, regi_irq, rw_mask);
+	serial_cris_stop_tx(port);
+	serial_cris_stop_rx(port);
+
+	if (port->line == 0) {
+		intr_mask.ser0 = 0;
+		free_irq(SER0_INTR_VECT, &serial_cris_ports[0]);
+#ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA6_OUT
+		intr_mask.dma6 = 0;
+		crisv32_free_dma(6);
+		free_irq(DMA6_INTR_VECT, &serial_cris_ports[0]);
+#endif
+#ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA7_IN
+		intr_mask.dma7 = 0;
+		crisv32_free_dma(7);
+		free_irq(DMA7_INTR_VECT, &serial_cris_ports[0]);
+#endif
+	} else if (port->line == 1) {
+		intr_mask.ser1 = 0;
+		free_irq(SER1_INTR_VECT, &serial_cris_ports[1]);
+#ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA4_OUT
+		intr_mask.dma4 = 0;
+		crisv32_free_dma(4);
+		free_irq(DMA4_INTR_VECT, &serial_cris_ports[1]);
+#endif
+#ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA5_IN
+		intr_mask.dma5 = 0;
+		crisv32_free_dma(5);
+		free_irq(DMA5_INTR_VECT, &serial_cris_ports[1]);
+#endif
+	} else if (port->line == 2) {
+		intr_mask.ser2 = 0;
+		free_irq(SER2_INTR_VECT, &serial_cris_ports[2]);
+#ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA2_OUT
+		intr_mask.dma2 = 0;
+		crisv32_free_dma(2);
+		free_irq(DMA2_INTR_VECT, &serial_cris_ports[2]);
+#endif
+#ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA3_IN
+		intr_mask.dma3 = 0;
+		crisv32_free_dma(3);
+		free_irq(DMA3_INTR_VECT, &serial_cris_ports[2]);
+#endif
+	} else if (port->line == 3) {
+		intr_mask.ser3 = 0;
+		free_irq(SER3_INTR_VECT, &serial_cris_ports[3]);
+#ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA8_OUT
+		intr_mask.dma8 = 0;
+		crisv32_free_dma(8);
+		free_irq(DMA8_INTR_VECT, &serial_cris_ports[3]);
+#endif
+#ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA9_IN
+		intr_mask.dma9 = 0;
+		crisv32_free_dma(9);
+		free_irq(DMA9_INTR_VECT, &serial_cris_ports[3]);
+#endif
+	}
+
+	REG_WR(intr_vect, regi_irq, rw_mask, intr_mask);
+
+	serial_cris_set_mctrl(&up->port, up->port.mctrl);
+
+	if (up->regi_dmain) {
+		struct etrax_recv_buffer *rb;
+		struct etrax_recv_buffer *rb_next;
+		int i;
+		struct dma_descr_data *descr;
+
+		/*
+		 * In case of DMA and receive errors, there might be pending
+		 * receive buffers still linked here and not flushed upwards.
+		 * Release them.
+		 */
+		for (rb = up->first_recv_buffer; rb != NULL; rb = rb_next) {
+			rb_next = rb->next;
+			kfree (rb);
+		}
+		up->first_recv_buffer = NULL;
+		up->last_recv_buffer = NULL;
+
+		/*
+		 * Also release buffers that were attached to the DMA
+		 * before we shut down the hardware above.
+		 */
+		for (i = 0, descr = up->rec_descr;
+		     i < SERIAL_RECV_DESCRIPTORS;
+		     i++)
+			if (descr[i].buf) {
+				rb = phys_to_virt((u32) descr[i].buf)
+				  - sizeof *rb;
+				kfree(rb);
+				descr[i].buf = NULL;
+			}
+	}
+
+	spin_unlock_irqrestore(&up->port.lock, flags);
+
+}
+
+static void
+serial_cris_set_termios(struct uart_port *port, struct termios *termios,
+		        struct termios *old)
+{
+	struct uart_cris_port *up = (struct uart_cris_port *)port;
+	unsigned long flags;
+	reg_ser_rw_xoff xoff;
+	reg_ser_rw_xoff_clr xoff_clr = {0};
+	reg_ser_rw_tr_ctrl tx_ctrl = {0};
+	reg_ser_rw_tr_dma_en tx_dma_en = {0};
+	reg_ser_rw_rec_ctrl rx_ctrl = {0};
+	reg_ser_rw_tr_baud_div tx_baud_div = {0};
+	reg_ser_rw_rec_baud_div rx_baud_div = {0};
+	reg_ser_r_stat_din rstat;
+        int baud;
+
+	if (old &&
+            termios->c_cflag == old->c_cflag &&
+	    termios->c_iflag == old->c_iflag)
+		return;
+
+	/* Start with default settings and then fill in changes. */
+
+	/* Tx: 8 bit, no/even parity, 1 stop bit, no cts. */
+	tx_ctrl.base_freq = regk_ser_f29_493;
+	tx_ctrl.en = 0;
+	tx_ctrl.stop = 0;
+#ifdef CONFIG_ETRAX_RS485
+	if (up->rs485.enabled && (up->port_type != TYPE_485FD)) {
+	  tx_ctrl.auto_rts = regk_ser_yes;
+	} else
+#endif
+	  tx_ctrl.auto_rts = regk_ser_no;
+	tx_ctrl.txd = 1;
+	tx_ctrl.auto_cts = 0;
+	/* Rx: 8 bit, no/even parity. */
+	if (up->regi_dmain) {
+		rx_ctrl.dma_mode = 1;
+		rx_ctrl.auto_eop = 1;
+	}
+	rx_ctrl.dma_err = regk_ser_stop;
+	rx_ctrl.sampling = regk_ser_majority;
+	rx_ctrl.timeout = 1;
+
+#ifdef CONFIG_ETRAX_RS485
+	if (up->rs485.enabled && (up->port_type != TYPE_485FD)) {
+#  ifdef CONFIG_ETRAX_RS485_DISABLE_RECEIVER
+		rx_ctrl.half_duplex = regk_ser_yes;
+#  endif 
+		rx_ctrl.rts_n = up->rs485.rts_after_sent ?
+		  regk_ser_active : regk_ser_inactive;
+	} else if (up->port_type == TYPE_485FD) {
+		rx_ctrl.rts_n = regk_ser_active;
+	} else
+#endif
+	  rx_ctrl.rts_n = regk_ser_inactive;
+
+	/* Common for tx and rx: 8N1. */
+	tx_ctrl.data_bits = regk_ser_bits8;
+	rx_ctrl.data_bits = regk_ser_bits8;
+	tx_ctrl.par = regk_ser_even;
+	rx_ctrl.par = regk_ser_even;
+	tx_ctrl.par_en = regk_ser_no;
+	rx_ctrl.par_en = regk_ser_no;
+
+	tx_ctrl.stop_bits = regk_ser_bits1;
+
+
+	/* Change baud-rate and write it to the hardware. */
+
+	/* baud_clock = base_freq / (divisor*8)
+	 * divisor = base_freq / (baud_clock * 8)
+	 * base_freq is either:
+	 * off, ext, 29.493MHz, 32.000 MHz, 32.768 MHz or 100 MHz
+	 * 20.493MHz is used for standard baudrates
+	 */
+
+	/*
+	 * For the console port we keep the original baudrate here.  Not very
+	 * beautiful.
+	 */
+        if ((port != console_port) || old)
+		baud = uart_get_baud_rate(port, termios, old, 0,
+					  port->uartclk / 8);
+	else
+		baud = console_baud;
+
+	tx_baud_div.div = 29493000 / (8 * baud);
+	/* Rx uses same as tx. */
+	rx_baud_div.div = tx_baud_div.div;
+	rx_ctrl.base_freq = tx_ctrl.base_freq;
+
+	if ((termios->c_cflag & CSIZE) == CS7) {
+		/* Set 7 bit mode. */
+		tx_ctrl.data_bits = regk_ser_bits7;
+		rx_ctrl.data_bits = regk_ser_bits7;
+	}
+
+	if (termios->c_cflag & CSTOPB) {
+		/* Set 2 stop bit mode. */
+		tx_ctrl.stop_bits = regk_ser_bits2;
+	}
+
+	if (termios->c_cflag & PARENB) {
+		/* Enable parity. */
+		tx_ctrl.par_en = regk_ser_yes;
+		rx_ctrl.par_en = regk_ser_yes;
+	}
+
+	if (termios->c_cflag & CMSPAR) {
+		if (termios->c_cflag & PARODD) {
+			/* Set mark parity if PARODD and CMSPAR. */
+			tx_ctrl.par = regk_ser_mark;
+			rx_ctrl.par = regk_ser_mark;
+		} else {
+			tx_ctrl.par = regk_ser_space;
+			rx_ctrl.par = regk_ser_space;
+		}
+	} else {
+		if (termios->c_cflag & PARODD) {
+			/* Set odd parity. */
+		       tx_ctrl.par = regk_ser_odd;
+		       rx_ctrl.par = regk_ser_odd;
+		}
+	}
+
+	if (termios->c_cflag & CRTSCTS) {
+		/* Enable automatic CTS handling. */
+		tx_ctrl.auto_cts = regk_ser_yes;
+	}
+
+	/* Make sure the tx and rx are enabled. */
+	tx_ctrl.en = regk_ser_yes;
+	rx_ctrl.en = regk_ser_yes;
+
+	/*
+	 * Wait for tr_idle in case a character is being output, so it won't
+	 * be damaged by the changes we do below.  It seems the termios
+	 * changes "sometimes" (we can't see e.g. a tcsetattr TCSANOW
+	 * parameter here) should take place no matter what state.  However,
+	 * in case we should wait, we may have a non-empty transmitter state
+	 * as we tell the upper layers that we're all done when we've passed
+	 * characters to the hardware, but we don't wait for them being
+	 * actually shifted out.
+	 */
+	spin_lock_irqsave(&port->lock, flags);
+
+	/*
+	 * None of our interrupts re-enable DMA, so it's thankfully ok to
+	 * disable it once, outside the loop.
+	 */
+	tx_dma_en.en = 0;
+	REG_WR(ser, up->regi_ser, rw_tr_dma_en, tx_dma_en);
+	do {
+		/*
+		 * Make sure we have integrity between the read r_stat status
+		 * and us writing the registers below, but don't busy-wait
+		 * with interrupts off.  We need to keep the port lock though
+		 * (if we go SMP), so nobody else writes characters.
+		 */
+		local_irq_restore(flags);
+		local_irq_save(flags);
+		rstat = REG_RD(ser, up->regi_ser, r_stat_din);
+	} while (!rstat.tr_idle);
+
+	/* Actually write the control regs (if modified) to the hardware. */
+
+	uart_update_timeout(port, termios->c_cflag, port->uartclk/8);
+	MODIFY_REG(up->regi_ser, rw_rec_baud_div, rx_baud_div);
+	MODIFY_REG(up->regi_ser, rw_rec_ctrl, rx_ctrl);
+
+	MODIFY_REG(up->regi_ser, rw_tr_baud_div, tx_baud_div);
+	MODIFY_REG(up->regi_ser, rw_tr_ctrl, tx_ctrl);
+
+	tx_dma_en.en = up->regi_dmaout != 0;
+	REG_WR(ser, up->regi_ser, rw_tr_dma_en, tx_dma_en);
+
+	xoff = REG_RD(ser, up->regi_ser, rw_xoff);
+
+	if (up->port.info && (up->port.info->tty->termios->c_iflag & IXON)) {
+		xoff.chr = STOP_CHAR(up->port.info->tty);
+		xoff.automatic = regk_ser_yes;
+	} else
+		xoff.automatic = regk_ser_no;
+
+	MODIFY_REG(up->regi_ser, rw_xoff, xoff);
+
+	/*
+	 * Make sure we don't start in an automatically shut-off state due to
+	 * a previous early exit.
+	 */
+	xoff_clr.clr = 1;
+	REG_WR(ser, up->regi_ser, rw_xoff_clr, xoff_clr);
+
+	serial_cris_set_mctrl(&up->port, up->port.mctrl);
+	spin_unlock_irqrestore(&up->port.lock, flags);
+}
+
+static const char *
+serial_cris_type(struct uart_port *port)
+{
+	return "CRISv32";
+}
+
+static void serial_cris_release_port(struct uart_port *port)
+{
+}
+
+static int serial_cris_request_port(struct uart_port *port)
+{
+	return 0;
+}
+
+static void serial_cris_config_port(struct uart_port *port, int flags)
+{
+	struct uart_cris_port *up = (struct uart_cris_port *)port;
+	up->port.type = PORT_CRIS;
+}
+
+#if defined(CONFIG_ETRAX_RS485)
+
+static void cris_set_rs485_mode(struct uart_cris_port* up) {
+	reg_ser_rw_tr_ctrl tr_ctrl;
+	reg_ser_rw_rec_ctrl rec_ctrl;
+	reg_scope_instances regi_ser = up->regi_ser;
+
+	if (up->port_type == TYPE_485FD)
+		/* We do not want to change anything if we are in 485FD mode */
+		return;
+
+	tr_ctrl = REG_RD(ser, regi_ser, rw_tr_ctrl);
+	rec_ctrl = REG_RD(ser, regi_ser, rw_rec_ctrl);
+
+	/* Set port in RS-485 mode */
+	if (up->rs485.enabled) {
+		tr_ctrl.auto_rts = regk_ser_yes;
+		rec_ctrl.rts_n = up->rs485.rts_after_sent ?
+		  regk_ser_active : regk_ser_inactive;
+#ifdef CONFIG_ETRAX_RS485_DISABLE_RECEIVER
+		rec_ctrl.half_duplex = regk_ser_yes;
+#endif
+	}
+	/* Set port to RS-232 mode */
+	else {
+		rec_ctrl.rts_n = regk_ser_inactive;
+		tr_ctrl.auto_rts = regk_ser_no;
+		rec_ctrl.half_duplex = regk_ser_no;
+	}
+
+	REG_WR(ser, regi_ser, rw_tr_ctrl, tr_ctrl);
+	REG_WR(ser, regi_ser, rw_rec_ctrl, rec_ctrl);
+}
+
+/* Enable/disable RS-485 mode on selected port. */
+static int
+cris_enable_rs485(struct uart_cris_port* up, struct rs485_control *r)
+{
+	if (up->port_type == TYPE_485FD)
+		/* Port in 485FD mode can not chage mode */
+		goto out;
+
+	up->rs485.enabled = 0x1 & r->enabled;
+	up->rs485.rts_on_send = 0x01 & r->rts_on_send;
+	up->rs485.rts_after_sent = 0x01 & r->rts_after_sent;
+	up->rs485.delay_rts_before_send = r->delay_rts_before_send;
+	
+	cris_set_rs485_mode(up);
+ out:
+	return 0;
+}
+
+
+/* Enable RS485 mode on port and send the data. Port will stay
+ * in 485 mode after the data has been sent.
+ */
+static int
+cris_write_rs485(struct uart_cris_port* up, const unsigned char *buf,
+		 int count)
+{
+	up->rs485.enabled = 1;
+
+	/* Set the port in RS485 mode */
+	cris_set_rs485_mode(up);
+
+	/* Send the data */
+	count = serial_cris_driver.tty_driver->write(up->port.info->tty, buf, count);
+
+	return count;
+}
+
+#endif /* CONFIG_ETRAX_RS485 */
+
+static int serial_cris_ioctl(struct uart_port *port, unsigned int cmd,
+                             unsigned long arg)
+{
+	struct uart_cris_port *up = (struct uart_cris_port *)port;
+
+	switch (cmd) {
+#if defined(CONFIG_ETRAX_RS485)
+	case TIOCSERSETRS485: {
+		struct rs485_control rs485ctrl;
+		if (copy_from_user(&rs485ctrl, (struct rs485_control*) arg,
+				   sizeof(rs485ctrl)))
+			return -EFAULT;
+
+		return cris_enable_rs485(up, &rs485ctrl);
+	}
+
+	case TIOCSERWRRS485: {
+		struct rs485_write rs485wr;
+		if (copy_from_user(&rs485wr, (struct rs485_write*)arg,
+				   sizeof(rs485wr)))
+			return -EFAULT;
+
+		return cris_write_rs485(up, rs485wr.outc, rs485wr.outc_size);
+	}
+#endif
+	default:
+		return -ENOIOCTLCMD;
+	}
+
+	return 0;
+}
+
+static const struct uart_ops serial_cris_pops = {
+	.tx_empty	= serial_cris_tx_empty,
+	.set_mctrl	= serial_cris_set_mctrl,
+	.get_mctrl	= serial_cris_get_mctrl,
+	.stop_tx	= serial_cris_stop_tx,
+	.start_tx	= serial_cris_start_tx,
+	.send_xchar	= serial_cris_send_xchar,
+	.stop_rx	= serial_cris_stop_rx,
+	.enable_ms	= serial_cris_enable_ms,
+	.break_ctl	= serial_cris_break_ctl,
+	.startup	= serial_cris_startup,
+	.shutdown	= serial_cris_shutdown,
+	.set_termios	= serial_cris_set_termios,
+	.type		= serial_cris_type,
+	.release_port	= serial_cris_release_port,
+	.request_port	= serial_cris_request_port,
+	.config_port	= serial_cris_config_port,
+	.ioctl		= serial_cris_ioctl,
+};
+
+/*
+ * It's too easy to break CONFIG_ETRAX_DEBUG_PORT_NULL and the
+ * no-config choices by adding and moving code to before a necessary
+ * early exit in all functions for the special case of
+ * up->regi_ser == 0.  This collection of dummy functions lets us
+ * avoid that.  Maybe there should be a generic table of dummy serial
+ * functions?
+ */
+
+static unsigned int serial_cris_tx_empty_dummy(struct uart_port *port)
+{
+	return TIOCSER_TEMT;
+}
+
+static void serial_cris_set_mctrl_dummy(struct uart_port *port,
+					unsigned int mctrl)
+{
+}
+
+static unsigned int serial_cris_get_mctrl_dummy(struct uart_port *port)
+{
+	return 0;
+}
+
+static void serial_cris_stop_tx_dummy(struct uart_port *port)
+{
+}
+
+static void serial_cris_start_tx_dummy(struct uart_port *port)
+{
+	/* Discard outbound characters. */
+	struct uart_cris_port *up = (struct uart_cris_port *)port;
+	struct circ_buf *xmit = &up->port.info->xmit;
+	xmit->tail = xmit->head;
+	uart_write_wakeup(port);
+}
+
+#define serial_cris_stop_rx_dummy serial_cris_stop_tx_dummy
+
+#define serial_cris_enable_ms_dummy serial_cris_stop_tx_dummy
+
+static void serial_cris_break_ctl_dummy(struct uart_port *port,
+					int break_state)
+{
+}
+
+static int serial_cris_startup_dummy(struct uart_port *port)
+{
+	return 0;
+}
+
+#define serial_cris_shutdown_dummy serial_cris_stop_tx_dummy
+
+static void
+serial_cris_set_termios_dummy(struct uart_port *port, struct termios *termios,
+			      struct termios *old)
+{
+}
+
+#define serial_cris_release_port_dummy serial_cris_stop_tx_dummy
+#define serial_cris_request_port_dummy serial_cris_startup_dummy
+
+static const struct uart_ops serial_cris_dummy_pops = {
+	/*
+	 * We *could* save one or two of those with different
+	 * signature by casting and knowledge of the ABI, but it's
+	 * just not worth the maintenance headache.
+	 * For the ones we don't define here, the default (usually meaning
+	 * "unimplemented") makes sense.
+	 */
+	.tx_empty	= serial_cris_tx_empty_dummy,
+	.set_mctrl	= serial_cris_set_mctrl_dummy,
+	.get_mctrl	= serial_cris_get_mctrl_dummy,
+	.stop_tx	= serial_cris_stop_tx_dummy,
+	.start_tx	= serial_cris_start_tx_dummy,
+	.stop_rx	= serial_cris_stop_rx_dummy,
+	.enable_ms	= serial_cris_enable_ms_dummy,
+	.break_ctl	= serial_cris_break_ctl_dummy,
+	.startup	= serial_cris_startup_dummy,
+	.shutdown	= serial_cris_shutdown_dummy,
+	.set_termios	= serial_cris_set_termios_dummy,
+
+	/* This one we keep the same. */
+	.type		= serial_cris_type,
+
+	.release_port	= serial_cris_release_port_dummy,
+	.request_port	= serial_cris_request_port_dummy,
+
+	/*
+	 * This one we keep the same too, as long as it doesn't do
+	 * anything else but to set the type.
+	 */
+	.config_port	= serial_cris_config_port,
+};
+
+static void cris_serial_port_init(struct uart_port *port, int line)
+{
+	struct uart_cris_port *up = (struct uart_cris_port *)port;
+	static int first = 1;
+
+	if (up->initialized)
+		return;
+	up->initialized = 1;
+	port->line = line;
+	spin_lock_init(&port->lock);
+	port->ops =
+		up->regi_ser == 0 ? &serial_cris_dummy_pops :
+		&serial_cris_pops;
+	port->irq = up->irq;
+	port->iobase = up->regi_ser ? up->regi_ser : 1;
+	port->uartclk = 29493000;
+
+	/*
+	 * We can't fit any more than 255 here (unsigned char), though
+	 * actually UART_XMIT_SIZE characters could be pending output (if it
+	 * wasn't for the single test in transmit_chars_dma).  At time of this
+	 * writing, the definition of "fifosize" is here the amount of
+	 * characters that can be pending output after a start_tx call until
+	 * tx_empty returns 1: see serial_core.c:uart_wait_until_sent.  This
+	 * matters for timeout calculations unfortunately, but keeping larger
+	 * amounts at the DMA wouldn't win much so let's just play nice.
+	 */
+	port->fifosize = 255;
+	port->flags = UPF_BOOT_AUTOCONF;
+
+#ifdef CONFIG_ETRAX_RS485
+	/* Set sane defaults. */
+	up->rs485.rts_on_send = 0;
+	up->rs485.rts_after_sent = 1;
+	up->rs485.delay_rts_before_send = 0;
+	if (up->port_type > TYPE_232)
+		up->rs485.enabled = 1;
+	else
+		up->rs485.enabled = 0;
+#endif
+
+	if (first) {
+		first = 0;
+#ifdef CONFIG_ETRAX_SERIAL_PORT0
+		SETUP_PINS(0);
+#endif
+#ifdef CONFIG_ETRAX_SERIAL_PORT1
+		SETUP_PINS(1);
+#endif
+#ifdef CONFIG_ETRAX_SERIAL_PORT2
+		SETUP_PINS(2);
+#endif
+#ifdef CONFIG_ETRAX_SERIAL_PORT3
+		SETUP_PINS(3);
+#endif
+	}
+}
+
+static int __init serial_cris_init(void)
+{
+	int ret, i;
+	reg_ser_rw_rec_ctrl rec_ctrl;
+	printk(KERN_INFO "Serial: CRISv32 driver $Revision: 1.78 $ ");
+
+	ret = uart_register_driver(&serial_cris_driver);
+	if (ret)
+		goto out;
+
+	for (i = 0; i < UART_NR; i++) {
+		if (serial_cris_ports[i].used) {
+#ifdef CONFIG_ETRAX_RS485
+			/* Make sure that the RTS pin stays low when allocating
+			 * pins for a port in 485 mode. 
+			 */
+			if (serial_cris_ports[i].port_type > TYPE_232) {
+				rec_ctrl = REG_RD(ser, serial_cris_ports[i].regi_ser, rw_rec_ctrl);
+				rec_ctrl.rts_n = regk_ser_active;
+				REG_WR(ser, serial_cris_ports[i].regi_ser, rw_rec_ctrl, rec_ctrl); 
+			}
+#endif
+			switch (serial_cris_ports[i].regi_ser) {
+			case regi_ser1:
+				if (crisv32_pinmux_alloc_fixed(pinmux_ser1)) {
+					printk("Failed to allocate pins for ser1, disable port\n");
+					serial_cris_ports[i].used = 0;
+					continue;
+				}
+				break;
+			case regi_ser2:
+				if (crisv32_pinmux_alloc_fixed(pinmux_ser2)) {
+					printk("Failed to allocate pins for ser2, disable port\n");
+					serial_cris_ports[i].used = 0;
+					continue;
+				}
+				break;
+			case regi_ser3:
+				if (crisv32_pinmux_alloc_fixed(pinmux_ser3)) {
+					printk("Failed to allocate pins for ser3, disable port\n");
+					serial_cris_ports[i].used = 0;
+					continue;
+				}
+				break;
+			}
+
+			struct uart_port *port = &serial_cris_ports[i].port;
+			cris_console.index = i;
+			cris_serial_port_init(port, i);
+			uart_add_one_port(&serial_cris_driver, port);
+		}
+	}
+
+out:
+	return ret;
+}
+
+static void __exit serial_cris_exit(void)
+{
+	int i;
+	for (i = 0; i < UART_NR; i++)
+		if (serial_cris_ports[i].used) {
+			switch (serial_cris_ports[i].regi_ser) {
+			case regi_ser1:
+				crisv32_pinmux_dealloc_fixed(pinmux_ser1);
+				break;
+			case regi_ser2:
+				crisv32_pinmux_dealloc_fixed(pinmux_ser2);
+				break;
+			case regi_ser3:
+				crisv32_pinmux_dealloc_fixed(pinmux_ser3);
+				break;
+			}
+			uart_remove_one_port(&serial_cris_driver,
+				 &serial_cris_ports[i].port);
+		}
+	uart_unregister_driver(&serial_cris_driver);
+}
+
+module_init(serial_cris_init);
+module_exit(serial_cris_exit);
--- linux-2.6.19.2.orig/drivers/usb/host/hc_crisv10.c	2007-01-10 20:10:37.000000000 +0100
+++ linux-2.6.19.2.dev/drivers/usb/host/hc-crisv10.c	2007-02-26 20:58:29.000000000 +0100
@@ -1,219 +1,51 @@
 /*
- * usb-host.c: ETRAX 100LX USB Host Controller Driver (HCD)
  *
- * Copyright (c) 2002, 2003 Axis Communications AB.
+ * ETRAX 100LX USB Host Controller Driver
+ *
+ * Copyright (C) 2005, 2006  Axis Communications AB
+ *
+ * Author: Konrad Eriksson <konrad.eriksson@axis.se>
+ *
  */
 
+#include <linux/module.h>
 #include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/ioport.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/errno.h>
-#include <linux/unistd.h>
-#include <linux/interrupt.h>
 #include <linux/init.h>
-#include <linux/list.h>
+#include <linux/moduleparam.h>
 #include <linux/spinlock.h>
+#include <linux/usb.h>
+#include <linux/platform_device.h>
 
-#include <asm/uaccess.h>
 #include <asm/io.h>
 #include <asm/irq.h>
-#include <asm/dma.h>
-#include <asm/system.h>
-#include <asm/arch/svinto.h>
+#include <asm/arch/dma.h>
+#include <asm/arch/io_interface_mux.h>
 
-#include <linux/usb.h>
-/* Ugly include because we don't live with the other host drivers. */
-#include <../drivers/usb/core/hcd.h>
-#include <../drivers/usb/core/usb.h>
-
-#include "hc_crisv10.h"
+#include "../core/hcd.h"
+#include "../core/hub.h"
+#include "hc-crisv10.h"
+#include "hc-cris-dbg.h"
+
+
+/***************************************************************************/
+/***************************************************************************/
+/* Host Controller settings                                                */
+/***************************************************************************/
+/***************************************************************************/
+
+#define VERSION			"1.00"
+#define COPYRIGHT		"(c) 2005, 2006 Axis Communications AB"
+#define DESCRIPTION             "ETRAX 100LX USB Host Controller"
 
 #define ETRAX_USB_HC_IRQ USB_HC_IRQ_NBR
 #define ETRAX_USB_RX_IRQ USB_DMA_RX_IRQ_NBR
 #define ETRAX_USB_TX_IRQ USB_DMA_TX_IRQ_NBR
 
-static const char *usb_hcd_version = "$Revision: 1.2 $";
-
-#undef KERN_DEBUG
-#define KERN_DEBUG ""
-
-
-#undef USB_DEBUG_RH
-#undef USB_DEBUG_EPID
-#undef USB_DEBUG_SB
-#undef USB_DEBUG_DESC
-#undef USB_DEBUG_URB
-#undef USB_DEBUG_TRACE
-#undef USB_DEBUG_BULK
-#undef USB_DEBUG_CTRL
-#undef USB_DEBUG_INTR
-#undef USB_DEBUG_ISOC
-
-#ifdef USB_DEBUG_RH
-#define dbg_rh(format, arg...) printk(KERN_DEBUG __FILE__ ": (RH) " format "\n" , ## arg)
-#else
-#define dbg_rh(format, arg...) do {} while (0)
-#endif
-
-#ifdef USB_DEBUG_EPID
-#define dbg_epid(format, arg...) printk(KERN_DEBUG __FILE__ ": (EPID) " format "\n" , ## arg)
-#else
-#define dbg_epid(format, arg...) do {} while (0)
-#endif
-
-#ifdef USB_DEBUG_SB
-#define dbg_sb(format, arg...) printk(KERN_DEBUG __FILE__ ": (SB) " format "\n" , ## arg)
-#else
-#define dbg_sb(format, arg...) do {} while (0)
-#endif
-
-#ifdef USB_DEBUG_CTRL
-#define dbg_ctrl(format, arg...) printk(KERN_DEBUG __FILE__ ": (CTRL) " format "\n" , ## arg)
-#else
-#define dbg_ctrl(format, arg...) do {} while (0)
-#endif
-
-#ifdef USB_DEBUG_BULK
-#define dbg_bulk(format, arg...) printk(KERN_DEBUG __FILE__ ": (BULK) " format "\n" , ## arg)
-#else
-#define dbg_bulk(format, arg...) do {} while (0)
-#endif
-
-#ifdef USB_DEBUG_INTR
-#define dbg_intr(format, arg...) printk(KERN_DEBUG __FILE__ ": (INTR) " format "\n" , ## arg)
-#else
-#define dbg_intr(format, arg...) do {} while (0)
-#endif
-
-#ifdef USB_DEBUG_ISOC
-#define dbg_isoc(format, arg...) printk(KERN_DEBUG __FILE__ ": (ISOC) " format "\n" , ## arg)
-#else
-#define dbg_isoc(format, arg...) do {} while (0)
-#endif
-
-#ifdef USB_DEBUG_TRACE
-#define DBFENTER (printk(": Entering: %s\n", __FUNCTION__))
-#define DBFEXIT  (printk(": Exiting:  %s\n", __FUNCTION__))
-#else
-#define DBFENTER do {} while (0)
-#define DBFEXIT  do {} while (0)
-#endif
-
-#define usb_pipeslow(pipe)	(((pipe) >> 26) & 1)
-
-/*-------------------------------------------------------------------
- Virtual Root Hub
- -------------------------------------------------------------------*/
-
-static __u8 root_hub_dev_des[] =
-{
-	0x12,  /*  __u8  bLength; */
-	0x01,  /*  __u8  bDescriptorType; Device */
-	0x00,  /*  __le16 bcdUSB; v1.0 */
-	0x01,
-	0x09,  /*  __u8  bDeviceClass; HUB_CLASSCODE */
-	0x00,  /*  __u8  bDeviceSubClass; */
-	0x00,  /*  __u8  bDeviceProtocol; */
-	0x08,  /*  __u8  bMaxPacketSize0; 8 Bytes */
-	0x00,  /*  __le16 idVendor; */
-	0x00,
-	0x00,  /*  __le16 idProduct; */
-	0x00,
-	0x00,  /*  __le16 bcdDevice; */
-	0x00,
-	0x00,  /*  __u8  iManufacturer; */
-	0x02,  /*  __u8  iProduct; */
-	0x01,  /*  __u8  iSerialNumber; */
-	0x01   /*  __u8  bNumConfigurations; */
-};
-
-/* Configuration descriptor */
-static __u8 root_hub_config_des[] =
-{
-	0x09,  /*  __u8  bLength; */
-	0x02,  /*  __u8  bDescriptorType; Configuration */
-	0x19,  /*  __le16 wTotalLength; */
-	0x00,
-	0x01,  /*  __u8  bNumInterfaces; */
-	0x01,  /*  __u8  bConfigurationValue; */
-	0x00,  /*  __u8  iConfiguration; */
-	0x40,  /*  __u8  bmAttributes; Bit 7: Bus-powered */
-	0x00,  /*  __u8  MaxPower; */
-
-     /* interface */
-	0x09,  /*  __u8  if_bLength; */
-	0x04,  /*  __u8  if_bDescriptorType; Interface */
-	0x00,  /*  __u8  if_bInterfaceNumber; */
-	0x00,  /*  __u8  if_bAlternateSetting; */
-	0x01,  /*  __u8  if_bNumEndpoints; */
-	0x09,  /*  __u8  if_bInterfaceClass; HUB_CLASSCODE */
-	0x00,  /*  __u8  if_bInterfaceSubClass; */
-	0x00,  /*  __u8  if_bInterfaceProtocol; */
-	0x00,  /*  __u8  if_iInterface; */
-
-     /* endpoint */
-	0x07,  /*  __u8  ep_bLength; */
-	0x05,  /*  __u8  ep_bDescriptorType; Endpoint */
-	0x81,  /*  __u8  ep_bEndpointAddress; IN Endpoint 1 */
-	0x03,  /*  __u8  ep_bmAttributes; Interrupt */
-	0x08,  /*  __le16 ep_wMaxPacketSize; 8 Bytes */
-	0x00,
-	0xff   /*  __u8  ep_bInterval; 255 ms */
-};
-
-static __u8 root_hub_hub_des[] =
-{
-	0x09,  /*  __u8  bLength; */
-	0x29,  /*  __u8  bDescriptorType; Hub-descriptor */
-	0x02,  /*  __u8  bNbrPorts; */
-	0x00,  /* __u16  wHubCharacteristics; */
-	0x00,
-	0x01,  /*  __u8  bPwrOn2pwrGood; 2ms */
-	0x00,  /*  __u8  bHubContrCurrent; 0 mA */
-	0x00,  /*  __u8  DeviceRemovable; *** 7 Ports max *** */
-	0xff   /*  __u8  PortPwrCtrlMask; *** 7 ports max *** */
-};
-
-static DEFINE_TIMER(bulk_start_timer, NULL, 0, 0);
-static DEFINE_TIMER(bulk_eot_timer, NULL, 0, 0);
-
-/* We want the start timer to expire before the eot timer, because the former might start
-   traffic, thus making it unnecessary for the latter to time out. */
-#define BULK_START_TIMER_INTERVAL (HZ/10) /* 100 ms */
-#define BULK_EOT_TIMER_INTERVAL (HZ/10+2) /* 120 ms */
-
-#define OK(x) len = (x); dbg_rh("OK(%d): line: %d", x, __LINE__); break
-#define CHECK_ALIGN(x) if (((__u32)(x)) & 0x00000003) \
-{panic("Alignment check (DWORD) failed at %s:%s:%d\n", __FILE__, __FUNCTION__, __LINE__);}
-
-#define SLAB_FLAG     (in_interrupt() ? SLAB_ATOMIC : SLAB_KERNEL)
-#define KMALLOC_FLAG  (in_interrupt() ? GFP_ATOMIC : GFP_KERNEL)
-
-/* Most helpful debugging aid */
-#define assert(expr) ((void) ((expr) ? 0 : (err("assert failed at line %d",__LINE__))))
-
-/* Alternative assert define which stops after a failed assert. */
-/*
-#define assert(expr)                                      \
-{                                                         \
-        if (!(expr)) {                                    \
-                err("assert failed at line %d",__LINE__); \
-                while (1);                                \
-        }                                                 \
-}
-*/
-
+/* Number of physical ports in Etrax 100LX */
+#define USB_ROOT_HUB_PORTS 2
 
-/* FIXME: Should RX_BUF_SIZE be a config option, or maybe we should adjust it dynamically?
-   To adjust it dynamically we would have to get an interrupt when we reach the end
-   of the rx descriptor list, or when we get close to the end, and then allocate more
-   descriptors. */
-
-#define NBR_OF_RX_DESC     512
-#define RX_DESC_BUF_SIZE   1024
-#define RX_BUF_SIZE        (NBR_OF_RX_DESC * RX_DESC_BUF_SIZE)
+const char hc_name[] = "hc-crisv10";
+const char product_desc[] = DESCRIPTION;
 
 /* The number of epids is, among other things, used for pre-allocating
    ctrl, bulk and isoc EP descriptors (one for each epid).
@@ -221,4332 +53,4632 @@
 #define NBR_OF_EPIDS       32
 
 /* Support interrupt traffic intervals up to 128 ms. */
-#define MAX_INTR_INTERVAL 128
+#define MAX_INTR_INTERVAL  128
 
-/* If periodic traffic (intr or isoc) is to be used, then one entry in the EP table
-   must be "invalid". By this we mean that we shouldn't care about epid attentions
-   for this epid, or at least handle them differently from epid attentions for "valid"
-   epids. This define determines which one to use (don't change it). */
-#define INVALID_EPID     31
+/* If periodic traffic (intr or isoc) is to be used, then one entry in the EP
+   table must be "invalid". By this we mean that we shouldn't care about epid
+   attentions for this epid, or at least handle them differently from epid
+   attentions for "valid" epids. This define determines which one to use
+   (don't change it). */
+#define INVALID_EPID       31
 /* A special epid for the bulk dummys. */
-#define DUMMY_EPID       30
-
-/* This is just a software cache for the valid entries in R_USB_EPT_DATA. */
-static __u32 epid_usage_bitmask;
-
-/* A bitfield to keep information on in/out traffic is needed to uniquely identify
-   an endpoint on a device, since the most significant bit which indicates traffic
-   direction is lacking in the ep_id field (ETRAX epids can handle both in and
-   out traffic on endpoints that are otherwise identical). The USB framework, however,
-   relies on them to be handled separately.  For example, bulk IN and OUT urbs cannot
-   be queued in the same list, since they would block each other. */
-static __u32 epid_out_traffic;
-
-/* DMA IN cache bug. Align the DMA IN buffers to 32 bytes, i.e. a cache line.
-   Since RX_DESC_BUF_SIZE is 1024 is a multiple of 32, all rx buffers will be cache aligned. */
-static volatile unsigned char RxBuf[RX_BUF_SIZE] __attribute__ ((aligned (32)));
-static volatile USB_IN_Desc_t RxDescList[NBR_OF_RX_DESC] __attribute__ ((aligned (4)));
-
-/* Pointers into RxDescList. */
-static volatile USB_IN_Desc_t *myNextRxDesc;
-static volatile USB_IN_Desc_t *myLastRxDesc;
-static volatile USB_IN_Desc_t *myPrevRxDesc;
-
-/* EP descriptors must be 32-bit aligned. */
-static volatile USB_EP_Desc_t TxCtrlEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4)));
-static volatile USB_EP_Desc_t TxBulkEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4)));
-/* After each enabled bulk EP (IN or OUT) we put two disabled EP descriptors with the eol flag set,
-   causing the DMA to stop the DMA channel. The first of these two has the intr flag set, which
-   gives us a dma8_sub0_descr interrupt. When we receive this, we advance the DMA one step in the
-   EP list and then restart the bulk channel, thus forcing a switch between bulk EP descriptors
-   in each frame. */
-static volatile USB_EP_Desc_t TxBulkDummyEPList[NBR_OF_EPIDS][2] __attribute__ ((aligned (4)));
-
-static volatile USB_EP_Desc_t TxIsocEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4)));
-static volatile USB_SB_Desc_t TxIsocSB_zout __attribute__ ((aligned (4)));
-
-static volatile USB_EP_Desc_t TxIntrEPList[MAX_INTR_INTERVAL] __attribute__ ((aligned (4)));
-static volatile USB_SB_Desc_t TxIntrSB_zout __attribute__ ((aligned (4)));
-
-/* A zout transfer makes a memory access at the address of its buf pointer, which means that setting
-   this buf pointer to 0 will cause an access to the flash. In addition to this, setting sw_len to 0
-   results in a 16/32 bytes (depending on DMA burst size) transfer. Instead, we set it to 1, and point
-   it to this buffer. */
-static int zout_buffer[4] __attribute__ ((aligned (4)));
+#define DUMMY_EPID         30
 
-/* Cache for allocating new EP and SB descriptors. */
-static kmem_cache_t *usb_desc_cache;
+/* Module settings */
 
-/* Cache for the registers allocated in the top half. */
-static kmem_cache_t *top_half_reg_cache;
+MODULE_DESCRIPTION(DESCRIPTION);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Konrad Eriksson <konrad.eriksson@axis.se>");
 
-/* Cache for the data allocated in the isoc descr top half. */
-static kmem_cache_t *isoc_compl_cache;
 
-static struct usb_bus *etrax_usb_bus;
+/* Module parameters */
 
-/* This is a circular (double-linked) list of the active urbs for each epid.
-   The head is never removed, and new urbs are linked onto the list as
-   urb_entry_t elements. Don't reference urb_list directly; use the wrapper
-   functions instead. Note that working with these lists might require spinlock
-   protection. */
-static struct list_head urb_list[NBR_OF_EPIDS];
+/* 0 = No ports enabled
+   1 = Only port 1 enabled (on board ethernet on devboard)
+   2 = Only port 2 enabled (external connector on devboard)
+   3 = Both ports enabled
+*/
+static unsigned int ports = 3;
+module_param(ports, uint, S_IRUGO);
+MODULE_PARM_DESC(ports, "Bitmask indicating USB ports to use");
 
-/* Read about the need and usage of this lock in submit_ctrl_urb. */
-static spinlock_t urb_list_lock;
 
-/* Used when unlinking asynchronously. */
-static struct list_head urb_unlink_list;
+/***************************************************************************/
+/***************************************************************************/
+/* Shared global variables for this module                                 */
+/***************************************************************************/
+/***************************************************************************/
 
-/* for returning string descriptors in UTF-16LE */
-static int ascii2utf (char *ascii, __u8 *utf, int utfmax)
-{
-	int retval;
+/* EP descriptor lists for non period transfers. Must be 32-bit aligned. */
+static volatile struct USB_EP_Desc TxBulkEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4)));
 
-	for (retval = 0; *ascii && utfmax > 1; utfmax -= 2, retval += 2) {
-		*utf++ = *ascii++ & 0x7f;
-		*utf++ = 0;
-	}
-	return retval;
-}
+static volatile struct USB_EP_Desc TxCtrlEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4)));
 
-static int usb_root_hub_string (int id, int serial, char *type, __u8 *data, int len)
-{
-	char buf [30];
+/* EP descriptor lists for period transfers. Must be 32-bit aligned. */
+static volatile struct USB_EP_Desc TxIntrEPList[MAX_INTR_INTERVAL] __attribute__ ((aligned (4)));
+static volatile struct USB_SB_Desc TxIntrSB_zout __attribute__ ((aligned (4)));
 
-	// assert (len > (2 * (sizeof (buf) + 1)));
-	// assert (strlen (type) <= 8);
+static volatile struct USB_EP_Desc TxIsocEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4)));
+static volatile struct USB_SB_Desc TxIsocSB_zout __attribute__ ((aligned (4)));
 
-	// language ids
-	if (id == 0) {
-		*data++ = 4; *data++ = 3;	/* 4 bytes data */
-		*data++ = 0; *data++ = 0;	/* some language id */
-		return 4;
-
-	// serial number
-	} else if (id == 1) {
-		sprintf (buf, "%x", serial);
-
-	// product description
-	} else if (id == 2) {
-		sprintf (buf, "USB %s Root Hub", type);
-
-	// id 3 == vendor description
-
-	// unsupported IDs --> "stall"
-	} else
-	    return 0;
-
-	data [0] = 2 + ascii2utf (buf, data + 2, len - 2);
-	data [1] = 3;
-	return data [0];
-}
+static volatile struct USB_SB_Desc TxIsocSBList[NBR_OF_EPIDS] __attribute__ ((aligned (4))); 
 
-/* Wrappers around the list functions (include/linux/list.h). */
+/* After each enabled bulk EP IN we put two disabled EP descriptors with the eol flag set,
+   causing the DMA to stop the DMA channel. The first of these two has the intr flag set, which
+   gives us a dma8_sub0_descr interrupt. When we receive this, we advance the DMA one step in the
+   EP list and then restart the bulk channel, thus forcing a switch between bulk EP descriptors
+   in each frame. */
+static volatile struct USB_EP_Desc TxBulkDummyEPList[NBR_OF_EPIDS][2] __attribute__ ((aligned (4)));
 
-static inline int urb_list_empty(int epid)
+/* List of URB pointers, where each points to the active URB for a epid.
+   For Bulk, Ctrl and Intr this means which URB that currently is added to
+   DMA lists (Isoc URBs are all directly added to DMA lists). As soon as
+   URB has completed is the queue examined and the first URB in queue is
+   removed and moved to the activeUrbList while its state change to STARTED and
+   its transfer(s) gets added to DMA list (exception Isoc where URBs enter
+   state STARTED directly and added transfers added to DMA lists). */
+static struct urb *activeUrbList[NBR_OF_EPIDS];
+
+/* Additional software state info for each epid */
+static struct etrax_epid epid_state[NBR_OF_EPIDS];
+
+/* Timer handles for bulk traffic timer used to avoid DMA bug where DMA stops
+   even if there is new data waiting to be processed */
+static struct timer_list bulk_start_timer = TIMER_INITIALIZER(NULL, 0, 0);
+static struct timer_list bulk_eot_timer = TIMER_INITIALIZER(NULL, 0, 0);
+
+/* We want the start timer to expire before the eot timer, because the former
+   might start traffic, thus making it unnecessary for the latter to time
+   out. */
+#define BULK_START_TIMER_INTERVAL (HZ/50) /* 20 ms */
+#define BULK_EOT_TIMER_INTERVAL (HZ/16) /* 60 ms */
+
+/* Delay before a URB completion happen when it's scheduled to be delayed */
+#define LATER_TIMER_DELAY (HZ/50) /* 20 ms */
+
+/* Simplifying macros for checking software state info of a epid */
+/* ----------------------------------------------------------------------- */
+#define epid_inuse(epid)       epid_state[epid].inuse
+#define epid_out_traffic(epid) epid_state[epid].out_traffic
+#define epid_isoc(epid)   (epid_state[epid].type == PIPE_ISOCHRONOUS ? 1 : 0)
+#define epid_intr(epid)   (epid_state[epid].type == PIPE_INTERRUPT ? 1 : 0)
+
+
+/***************************************************************************/
+/***************************************************************************/
+/* DEBUG FUNCTIONS                                                         */
+/***************************************************************************/
+/***************************************************************************/
+/* Note that these functions are always available in their "__" variants,
+   for use in error situations. The "__" missing variants are controlled by
+   the USB_DEBUG_DESC/USB_DEBUG_URB macros. */
+static void __dump_urb(struct urb* purb)
 {
-	return list_empty(&urb_list[epid]);
+  struct crisv10_urb_priv *urb_priv = purb->hcpriv;
+  int urb_num = -1;
+  if(urb_priv) {
+    urb_num = urb_priv->urb_num;
+  }
+  printk("\nURB:0x%x[%d]\n", (unsigned int)purb, urb_num);
+  printk("dev                   :0x%08lx\n", (unsigned long)purb->dev);
+  printk("pipe                  :0x%08x\n", purb->pipe);
+  printk("status                :%d\n", purb->status);
+  printk("transfer_flags        :0x%08x\n", purb->transfer_flags);
+  printk("transfer_buffer       :0x%08lx\n", (unsigned long)purb->transfer_buffer);
+  printk("transfer_buffer_length:%d\n", purb->transfer_buffer_length);
+  printk("actual_length         :%d\n", purb->actual_length);
+  printk("setup_packet          :0x%08lx\n", (unsigned long)purb->setup_packet);
+  printk("start_frame           :%d\n", purb->start_frame);
+  printk("number_of_packets     :%d\n", purb->number_of_packets);
+  printk("interval              :%d\n", purb->interval);
+  printk("error_count           :%d\n", purb->error_count);
+  printk("context               :0x%08lx\n", (unsigned long)purb->context);
+  printk("complete              :0x%08lx\n\n", (unsigned long)purb->complete);
+}
+
+static void __dump_in_desc(volatile struct USB_IN_Desc *in)
+{
+  printk("\nUSB_IN_Desc at 0x%08lx\n", (unsigned long)in);
+  printk("  sw_len  : 0x%04x (%d)\n", in->sw_len, in->sw_len);
+  printk("  command : 0x%04x\n", in->command);
+  printk("  next    : 0x%08lx\n", in->next);
+  printk("  buf     : 0x%08lx\n", in->buf);
+  printk("  hw_len  : 0x%04x (%d)\n", in->hw_len, in->hw_len);
+  printk("  status  : 0x%04x\n\n", in->status);
+}
+
+static void __dump_sb_desc(volatile struct USB_SB_Desc *sb)
+{
+  char tt = (sb->command & 0x30) >> 4;
+  char *tt_string;
+
+  switch (tt) {
+  case 0:
+    tt_string = "zout";
+    break;
+  case 1:
+    tt_string = "in";
+    break;
+  case 2:
+    tt_string = "out";
+    break;
+  case 3:
+    tt_string = "setup";
+    break;
+  default:
+    tt_string = "unknown (weird)";
+  }
+
+  printk(" USB_SB_Desc at 0x%08lx ", (unsigned long)sb);
+  printk(" command:0x%04x (", sb->command);
+  printk("rem:%d ", (sb->command & 0x3f00) >> 8);
+  printk("full:%d ", (sb->command & 0x40) >> 6);
+  printk("tt:%d(%s) ", tt, tt_string);
+  printk("intr:%d ", (sb->command & 0x8) >> 3);
+  printk("eot:%d ", (sb->command & 0x2) >> 1);
+  printk("eol:%d)", sb->command & 0x1);
+  printk(" sw_len:0x%04x(%d)", sb->sw_len, sb->sw_len);
+  printk(" next:0x%08lx", sb->next);
+  printk(" buf:0x%08lx\n", sb->buf);
+}
+
+
+static void __dump_ep_desc(volatile struct USB_EP_Desc *ep)
+{
+  printk("USB_EP_Desc at 0x%08lx ", (unsigned long)ep);
+  printk(" command:0x%04x (", ep->command);
+  printk("ep_id:%d ", (ep->command & 0x1f00) >> 8);
+  printk("enable:%d ", (ep->command & 0x10) >> 4);
+  printk("intr:%d ", (ep->command & 0x8) >> 3);
+  printk("eof:%d ", (ep->command & 0x2) >> 1);
+  printk("eol:%d)", ep->command & 0x1);
+  printk(" hw_len:0x%04x(%d)", ep->hw_len, ep->hw_len);
+  printk(" next:0x%08lx", ep->next);
+  printk(" sub:0x%08lx\n", ep->sub);
 }
 
-/* Returns first urb for this epid, or NULL if list is empty. */
-static inline struct urb *urb_list_first(int epid)
+static inline void __dump_ep_list(int pipe_type)
 {
-	struct urb *first_urb = 0;
+  volatile struct USB_EP_Desc *ep;
+  volatile struct USB_EP_Desc *first_ep;
+  volatile struct USB_SB_Desc *sb;
+
+  switch (pipe_type)
+    {
+    case PIPE_BULK:
+      first_ep = &TxBulkEPList[0];
+      break;
+    case PIPE_CONTROL:
+      first_ep = &TxCtrlEPList[0];
+      break;
+    case PIPE_INTERRUPT:
+      first_ep = &TxIntrEPList[0];
+      break;
+    case PIPE_ISOCHRONOUS:
+      first_ep = &TxIsocEPList[0];
+      break;
+    default:
+      warn("Cannot dump unknown traffic type");
+      return;
+    }
+  ep = first_ep;
+
+  printk("\n\nDumping EP list...\n\n");
+
+  do {
+    __dump_ep_desc(ep);
+    /* Cannot phys_to_virt on 0 as it turns into 80000000, which is != 0. */
+    sb = ep->sub ? phys_to_virt(ep->sub) : 0;
+    while (sb) {
+      __dump_sb_desc(sb);
+      sb = sb->next ? phys_to_virt(sb->next) : 0;
+    }
+    ep = (volatile struct USB_EP_Desc *)(phys_to_virt(ep->next));
 
-	if (!urb_list_empty(epid)) {
-		/* Get the first urb (i.e. head->next). */
-		urb_entry_t *urb_entry = list_entry((&urb_list[epid])->next, urb_entry_t, list);
-		first_urb = urb_entry->urb;
-	}
-	return first_urb;
+  } while (ep != first_ep);
 }
 
-/* Adds an urb_entry last in the list for this epid. */
-static inline void urb_list_add(struct urb *urb, int epid)
+static inline void __dump_ept_data(int epid)
 {
-	urb_entry_t *urb_entry = (urb_entry_t *)kmalloc(sizeof(urb_entry_t), KMALLOC_FLAG);
-	assert(urb_entry);
+  unsigned long flags;
+  __u32 r_usb_ept_data;
 
-	urb_entry->urb = urb;
-	list_add_tail(&urb_entry->list, &urb_list[epid]);
+  if (epid < 0 || epid > 31) {
+    printk("Cannot dump ept data for invalid epid %d\n", epid);
+    return;
+  }
+
+  local_irq_save(flags);
+  *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
+  nop();
+  r_usb_ept_data = *R_USB_EPT_DATA;
+  local_irq_restore(flags);
+
+  printk(" R_USB_EPT_DATA = 0x%x for epid %d :\n", r_usb_ept_data, epid);
+  if (r_usb_ept_data == 0) {
+    /* No need for more detailed printing. */
+    return;
+  }
+  printk("  valid           : %d\n", (r_usb_ept_data & 0x80000000) >> 31);
+  printk("  hold            : %d\n", (r_usb_ept_data & 0x40000000) >> 30);
+  printk("  error_count_in  : %d\n", (r_usb_ept_data & 0x30000000) >> 28);
+  printk("  t_in            : %d\n", (r_usb_ept_data & 0x08000000) >> 27);
+  printk("  low_speed       : %d\n", (r_usb_ept_data & 0x04000000) >> 26);
+  printk("  port            : %d\n", (r_usb_ept_data & 0x03000000) >> 24);
+  printk("  error_code      : %d\n", (r_usb_ept_data & 0x00c00000) >> 22);
+  printk("  t_out           : %d\n", (r_usb_ept_data & 0x00200000) >> 21);
+  printk("  error_count_out : %d\n", (r_usb_ept_data & 0x00180000) >> 19);
+  printk("  max_len         : %d\n", (r_usb_ept_data & 0x0003f800) >> 11);
+  printk("  ep              : %d\n", (r_usb_ept_data & 0x00000780) >> 7);
+  printk("  dev             : %d\n", (r_usb_ept_data & 0x0000003f));
+}
+
+static inline void __dump_ept_data_iso(int epid)
+{
+  unsigned long flags;
+  __u32 ept_data;
+
+  if (epid < 0 || epid > 31) {
+    printk("Cannot dump ept data for invalid epid %d\n", epid);
+    return;
+  }
+
+  local_irq_save(flags);
+  *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
+  nop();
+  ept_data = *R_USB_EPT_DATA_ISO;
+  local_irq_restore(flags);
+
+  printk(" R_USB_EPT_DATA = 0x%x for epid %d :\n", ept_data, epid);
+  if (ept_data == 0) {
+    /* No need for more detailed printing. */
+    return;
+  }
+  printk("  valid           : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, valid,
+						ept_data));
+  printk("  port            : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, port,
+						ept_data));
+  printk("  error_code      : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, error_code,
+						ept_data));
+  printk("  max_len         : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, max_len,
+						ept_data));
+  printk("  ep              : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, ep,
+						ept_data));
+  printk("  dev             : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, dev,
+						ept_data));
 }
 
-/* Search through the list for an element that contains this urb. (The list
-   is expected to be short and the one we are about to delete will often be
-   the first in the list.) */
-static inline urb_entry_t *__urb_list_entry(struct urb *urb, int epid)
+static inline void __dump_ept_data_list(void)
 {
-	struct list_head *entry;
-	struct list_head *tmp;
-	urb_entry_t *urb_entry;
-
-	list_for_each_safe(entry, tmp, &urb_list[epid]) {
-		urb_entry = list_entry(entry, urb_entry_t, list);
-		assert(urb_entry);
-		assert(urb_entry->urb);
-
-		if (urb_entry->urb == urb) {
-			return urb_entry;
-		}
-	}
-	return 0;
-}
+  int i;
 
-/* Delete an urb from the list. */
-static inline void urb_list_del(struct urb *urb, int epid)
-{
-	urb_entry_t *urb_entry = __urb_list_entry(urb, epid);
-	assert(urb_entry);
+  printk("Dumping the whole R_USB_EPT_DATA list\n");
 
-	/* Delete entry and free. */
-	list_del(&urb_entry->list);
-	kfree(urb_entry);
+  for (i = 0; i < 32; i++) {
+    __dump_ept_data(i);
+  }
+}
+
+static void debug_epid(int epid) {
+  int i;
+  
+  if(epid_isoc(epid)) {
+    __dump_ept_data_iso(epid);
+  } else {
+    __dump_ept_data(epid);
+  }
+
+  printk("Bulk:\n");
+  for(i = 0; i < 32; i++) {
+    if(IO_EXTRACT(USB_EP_command, epid, TxBulkEPList[i].command) ==
+       epid) {
+      printk("%d: ", i); __dump_ep_desc(&(TxBulkEPList[i]));
+    }
+  }
+
+  printk("Ctrl:\n");
+  for(i = 0; i < 32; i++) {
+    if(IO_EXTRACT(USB_EP_command, epid, TxCtrlEPList[i].command) ==
+       epid) {
+      printk("%d: ", i); __dump_ep_desc(&(TxCtrlEPList[i]));
+    }
+  }
+
+  printk("Intr:\n");
+  for(i = 0; i < MAX_INTR_INTERVAL; i++) {
+    if(IO_EXTRACT(USB_EP_command, epid, TxIntrEPList[i].command) ==
+       epid) {
+      printk("%d: ", i); __dump_ep_desc(&(TxIntrEPList[i]));
+    }
+  }
+  
+  printk("Isoc:\n");
+  for(i = 0; i < 32; i++) {
+    if(IO_EXTRACT(USB_EP_command, epid, TxIsocEPList[i].command) ==
+       epid) {
+      printk("%d: ", i); __dump_ep_desc(&(TxIsocEPList[i]));
+    }
+  }
+
+  __dump_ept_data_list();
+  __dump_ep_list(PIPE_INTERRUPT);
+  printk("\n\n");
+}
+
+
+
+char* hcd_status_to_str(__u8 bUsbStatus) {
+  static char hcd_status_str[128];
+  hcd_status_str[0] = '\0';
+  if(bUsbStatus & IO_STATE(R_USB_STATUS, ourun, yes)) {
+    strcat(hcd_status_str, "ourun ");
+  }
+  if(bUsbStatus & IO_STATE(R_USB_STATUS, perror, yes)) {
+    strcat(hcd_status_str, "perror ");
+  }
+  if(bUsbStatus & IO_STATE(R_USB_STATUS, device_mode, yes)) {
+    strcat(hcd_status_str, "device_mode ");
+  }
+  if(bUsbStatus & IO_STATE(R_USB_STATUS, host_mode, yes)) {
+    strcat(hcd_status_str, "host_mode ");
+  }
+  if(bUsbStatus & IO_STATE(R_USB_STATUS, started, yes)) {
+    strcat(hcd_status_str, "started ");
+  }
+  if(bUsbStatus & IO_STATE(R_USB_STATUS, running, yes)) {
+    strcat(hcd_status_str, "running ");
+  }
+  return hcd_status_str;
+}
+
+
+char* sblist_to_str(struct USB_SB_Desc* sb_desc) {
+  static char sblist_to_str_buff[128];
+  char tmp[32], tmp2[32];
+  sblist_to_str_buff[0] = '\0';
+  while(sb_desc != NULL) {
+    switch(IO_EXTRACT(USB_SB_command, tt, sb_desc->command)) {
+    case 0: sprintf(tmp, "zout");  break;
+    case 1: sprintf(tmp, "in");    break;
+    case 2: sprintf(tmp, "out");   break;
+    case 3: sprintf(tmp, "setup"); break;
+    }
+    sprintf(tmp2, "(%s %d)", tmp, sb_desc->sw_len);
+    strcat(sblist_to_str_buff, tmp2);
+    if(sb_desc->next != 0) {
+      sb_desc = phys_to_virt(sb_desc->next);
+    } else {
+      sb_desc = NULL;
+    }
+  }
+  return sblist_to_str_buff;
+}
+
+char* port_status_to_str(__u16 wPortStatus) {
+  static char port_status_str[128];
+  port_status_str[0] = '\0';
+  if(wPortStatus & IO_STATE(R_USB_RH_PORT_STATUS_1, connected, yes)) {
+    strcat(port_status_str, "connected ");
+  }
+  if(wPortStatus & IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes)) {
+    strcat(port_status_str, "enabled ");
+  }
+  if(wPortStatus & IO_STATE(R_USB_RH_PORT_STATUS_1, suspended, yes)) {
+    strcat(port_status_str, "suspended ");
+  }
+  if(wPortStatus & IO_STATE(R_USB_RH_PORT_STATUS_1, reset, yes)) {
+    strcat(port_status_str, "reset ");
+  }
+  if(wPortStatus & IO_STATE(R_USB_RH_PORT_STATUS_1, speed, full)) {
+    strcat(port_status_str, "full-speed ");
+  } else {
+    strcat(port_status_str, "low-speed ");
+  }
+  return port_status_str;
+}
+
+
+char* endpoint_to_str(struct usb_endpoint_descriptor *ed) {
+  static char endpoint_to_str_buff[128];
+  char tmp[32];
+  int epnum = ed->bEndpointAddress & 0x0F;
+  int dir = ed->bEndpointAddress & 0x80;
+  int type = ed->bmAttributes & 0x03;
+  endpoint_to_str_buff[0] = '\0';
+  sprintf(endpoint_to_str_buff, "ep:%d ", epnum);
+  switch(type) {
+  case 0:
+    sprintf(tmp, " ctrl");
+    break;
+  case 1:
+    sprintf(tmp, " isoc");
+    break;
+  case 2:
+    sprintf(tmp, " bulk");
+    break;
+  case 3:
+    sprintf(tmp, " intr");
+    break;
+  }
+  strcat(endpoint_to_str_buff, tmp);
+  if(dir) {
+    sprintf(tmp, " in");
+  } else {
+    sprintf(tmp, " out");
+  }
+  strcat(endpoint_to_str_buff, tmp);
+
+  return endpoint_to_str_buff;
+}
+
+/* Debug helper functions for Transfer Controller */
+char* pipe_to_str(unsigned int pipe) {
+  static char pipe_to_str_buff[128];
+  char tmp[64];
+  sprintf(pipe_to_str_buff, "dir:%s", str_dir(pipe));
+  sprintf(tmp, " type:%s", str_type(pipe));
+  strcat(pipe_to_str_buff, tmp);
+
+  sprintf(tmp, " dev:%d", usb_pipedevice(pipe));
+  strcat(pipe_to_str_buff, tmp);
+  sprintf(tmp, " ep:%d", usb_pipeendpoint(pipe));
+  strcat(pipe_to_str_buff, tmp);
+  return pipe_to_str_buff;
 }
 
-/* Move an urb to the end of the list. */
-static inline void urb_list_move_last(struct urb *urb, int epid)
-{
-	urb_entry_t *urb_entry = __urb_list_entry(urb, epid);
-	assert(urb_entry);
-
-	list_move_tail(&urb_entry->list, &urb_list[epid]);
-}
 
-/* Get the next urb in the list. */
-static inline struct urb *urb_list_next(struct urb *urb, int epid)
-{
-	urb_entry_t *urb_entry = __urb_list_entry(urb, epid);
+#define USB_DEBUG_DESC 1
 
-	assert(urb_entry);
+#ifdef USB_DEBUG_DESC
+#define dump_in_desc(x) __dump_in_desc(x)
+#define dump_sb_desc(...) __dump_sb_desc(...)
+#define dump_ep_desc(x) __dump_ep_desc(x)
+#define dump_ept_data(x) __dump_ept_data(x)
+#else
+#define dump_in_desc(...) do {} while (0)
+#define dump_sb_desc(...) do {} while (0)
+#define dump_ep_desc(...) do {} while (0)
+#endif
 
-	if (urb_entry->list.next != &urb_list[epid]) {
-		struct list_head *elem = urb_entry->list.next;
-		urb_entry = list_entry(elem, urb_entry_t, list);
-		return urb_entry->urb;
-	} else {
-		return NULL;
-	}
-}
 
+/* Uncomment this to enable massive function call trace
+   #define USB_DEBUG_TRACE */
 
+#ifdef USB_DEBUG_TRACE
+#define DBFENTER (printk(": Entering: %s\n", __FUNCTION__))
+#define DBFEXIT  (printk(": Exiting:  %s\n", __FUNCTION__))
+#else
+#define DBFENTER do {} while (0)
+#define DBFEXIT  do {} while (0)
+#endif
 
-/* For debug purposes only. */
-static inline void urb_list_dump(int epid)
-{
-	struct list_head *entry;
-	struct list_head *tmp;
-	urb_entry_t *urb_entry;
-	int i = 0;
-
-	info("Dumping urb list for epid %d", epid);
-
-	list_for_each_safe(entry, tmp, &urb_list[epid]) {
-		urb_entry = list_entry(entry, urb_entry_t, list);
-		info("   entry %d, urb = 0x%lx", i, (unsigned long)urb_entry->urb);
-	}
-}
+#define CHECK_ALIGN(x) if (((__u32)(x)) & 0x00000003) \
+{panic("Alignment check (DWORD) failed at %s:%s:%d\n", __FILE__, __FUNCTION__, __LINE__);}
 
-static void init_rx_buffers(void);
-static int etrax_rh_unlink_urb(struct urb *urb);
-static void etrax_rh_send_irq(struct urb *urb);
-static void etrax_rh_init_int_timer(struct urb *urb);
-static void etrax_rh_int_timer_do(unsigned long ptr);
-
-static int etrax_usb_setup_epid(struct urb *urb);
-static int etrax_usb_lookup_epid(struct urb *urb);
-static int etrax_usb_allocate_epid(void);
-static void etrax_usb_free_epid(int epid);
-
-static int etrax_remove_from_sb_list(struct urb *urb);
-
-static void* etrax_usb_buffer_alloc(struct usb_bus* bus, size_t size,
-	unsigned mem_flags, dma_addr_t *dma);
-static void etrax_usb_buffer_free(struct usb_bus *bus, size_t size, void *addr, dma_addr_t dma);
-
-static void etrax_usb_add_to_bulk_sb_list(struct urb *urb, int epid);
-static void etrax_usb_add_to_ctrl_sb_list(struct urb *urb, int epid);
-static void etrax_usb_add_to_intr_sb_list(struct urb *urb, int epid);
-static void etrax_usb_add_to_isoc_sb_list(struct urb *urb, int epid);
-
-static int etrax_usb_submit_bulk_urb(struct urb *urb);
-static int etrax_usb_submit_ctrl_urb(struct urb *urb);
-static int etrax_usb_submit_intr_urb(struct urb *urb);
-static int etrax_usb_submit_isoc_urb(struct urb *urb);
-
-static int etrax_usb_submit_urb(struct urb *urb, unsigned mem_flags);
-static int etrax_usb_unlink_urb(struct urb *urb, int status);
-static int etrax_usb_get_frame_number(struct usb_device *usb_dev);
-
-static irqreturn_t etrax_usb_tx_interrupt(int irq, void *vhc);
-static irqreturn_t etrax_usb_rx_interrupt(int irq, void *vhc);
-static irqreturn_t etrax_usb_hc_interrupt_top_half(int irq, void *vhc);
-static void etrax_usb_hc_interrupt_bottom_half(void *data);
-
-static void etrax_usb_isoc_descr_interrupt_bottom_half(void *data);
-
-
-/* The following is a list of interrupt handlers for the host controller interrupts we use.
-   They are called from etrax_usb_hc_interrupt_bottom_half. */
-static void etrax_usb_hc_isoc_eof_interrupt(void);
-static void etrax_usb_hc_bulk_eot_interrupt(int timer_induced);
-static void etrax_usb_hc_epid_attn_interrupt(usb_interrupt_registers_t *reg);
-static void etrax_usb_hc_port_status_interrupt(usb_interrupt_registers_t *reg);
-static void etrax_usb_hc_ctl_status_interrupt(usb_interrupt_registers_t *reg);
-
-static int etrax_rh_submit_urb (struct urb *urb);
-
-/* Forward declaration needed because they are used in the rx interrupt routine. */
-static void etrax_usb_complete_urb(struct urb *urb, int status);
-static void etrax_usb_complete_bulk_urb(struct urb *urb, int status);
-static void etrax_usb_complete_ctrl_urb(struct urb *urb, int status);
-static void etrax_usb_complete_intr_urb(struct urb *urb, int status);
-static void etrax_usb_complete_isoc_urb(struct urb *urb, int status);
+/* Most helpful debugging aid */
+#define ASSERT(expr) ((void) ((expr) ? 0 : (err("assert failed at: %s %d",__FUNCTION__, __LINE__))))
 
-static int etrax_usb_hc_init(void);
-static void etrax_usb_hc_cleanup(void);
 
-static struct usb_operations etrax_usb_device_operations =
-{
-	.get_frame_number = etrax_usb_get_frame_number,
-	.submit_urb = etrax_usb_submit_urb,
-	.unlink_urb = etrax_usb_unlink_urb,
-        .buffer_alloc = etrax_usb_buffer_alloc,
-        .buffer_free = etrax_usb_buffer_free
-};
+/***************************************************************************/
+/***************************************************************************/
+/* Forward declarations                                                    */
+/***************************************************************************/
+/***************************************************************************/
+void crisv10_hcd_epid_attn_irq(struct crisv10_irq_reg *reg);
+void crisv10_hcd_port_status_irq(struct crisv10_irq_reg *reg);
+void crisv10_hcd_ctl_status_irq(struct crisv10_irq_reg *reg);
+void crisv10_hcd_isoc_eof_irq(struct crisv10_irq_reg *reg);
+
+void rh_port_status_change(__u16[]);
+int  rh_clear_port_feature(__u8, __u16);
+int  rh_set_port_feature(__u8, __u16);
+static void rh_disable_port(unsigned int port);
+
+static void check_finished_bulk_tx_epids(struct usb_hcd *hcd,
+					 int timer);
+
+static int  tc_setup_epid(struct usb_host_endpoint *ep, struct urb *urb,
+			 int mem_flags);
+static void tc_free_epid(struct usb_host_endpoint *ep);
+static int  tc_allocate_epid(void);
+static void tc_finish_urb(struct usb_hcd *hcd, struct urb *urb, int status);
+static void tc_finish_urb_later(struct usb_hcd *hcd, struct urb *urb,
+				int status);
+
+static int  urb_priv_create(struct usb_hcd *hcd, struct urb *urb, int epid,
+			   int mem_flags);
+static void urb_priv_free(struct usb_hcd *hcd, struct urb *urb);
+
+static inline struct urb *urb_list_first(int epid);
+static inline void        urb_list_add(struct urb *urb, int epid,
+				      int mem_flags);
+static inline urb_entry_t *urb_list_entry(struct urb *urb, int epid);
+static inline void        urb_list_del(struct urb *urb, int epid);
+static inline void        urb_list_move_last(struct urb *urb, int epid);
+static inline struct urb *urb_list_next(struct urb *urb, int epid);
+
+int create_sb_for_urb(struct urb *urb, int mem_flags);
+int init_intr_urb(struct urb *urb, int mem_flags);
+
+static inline void  etrax_epid_set(__u8 index, __u32 data);
+static inline void  etrax_epid_clear_error(__u8 index);
+static inline void  etrax_epid_set_toggle(__u8 index, __u8 dirout,
+					      __u8 toggle);
+static inline __u8  etrax_epid_get_toggle(__u8 index, __u8 dirout);
+static inline __u32 etrax_epid_get(__u8 index);
+
+/* We're accessing the same register position in Etrax so
+   when we do full access the internal difference doesn't matter */
+#define etrax_epid_iso_set(index, data) etrax_epid_set(index, data)
+#define etrax_epid_iso_get(index) etrax_epid_get(index)
+
+
+static void        tc_dma_process_isoc_urb(struct urb *urb);
+static void        tc_dma_process_queue(int epid);
+static void        tc_dma_unlink_intr_urb(struct urb *urb);
+static irqreturn_t tc_dma_tx_interrupt(int irq, void *vhc);
+static irqreturn_t tc_dma_rx_interrupt(int irq, void *vhc);
+
+static void tc_bulk_start_timer_func(unsigned long dummy);
+static void tc_bulk_eot_timer_func(unsigned long dummy);
+
+
+/*************************************************************/
+/*************************************************************/
+/* Host Controler Driver block                               */
+/*************************************************************/
+/*************************************************************/
+
+/* HCD operations */
+static irqreturn_t crisv10_hcd_top_irq(int irq, void*);
+static int crisv10_hcd_reset(struct usb_hcd *);
+static int crisv10_hcd_start(struct usb_hcd *);
+static void crisv10_hcd_stop(struct usb_hcd *);
+#ifdef CONFIG_PM
+static int crisv10_hcd_suspend(struct device *, u32, u32);
+static int crisv10_hcd_resume(struct device *, u32);
+#endif /* CONFIG_PM */
+static int crisv10_hcd_get_frame(struct usb_hcd *);
+
+static int  tc_urb_enqueue(struct usb_hcd *, struct usb_host_endpoint *ep, struct urb *, gfp_t mem_flags);
+static int  tc_urb_dequeue(struct usb_hcd *, struct urb *);
+static void tc_endpoint_disable(struct usb_hcd *, struct usb_host_endpoint *ep);
+
+static int rh_status_data_request(struct usb_hcd *, char *);
+static int rh_control_request(struct usb_hcd *, u16, u16, u16, char*, u16);
+
+#ifdef CONFIG_PM
+static int crisv10_hcd_hub_suspend(struct usb_hcd *);
+static int crisv10_hcd_hub_resume(struct usb_hcd *);
+#endif /* CONFIG_PM */
+#ifdef CONFIG_USB_OTG
+static int crisv10_hcd_start_port_reset(struct usb_hcd *, unsigned);
+#endif /* CONFIG_USB_OTG */
+
+/* host controller driver interface */
+static const struct hc_driver crisv10_hc_driver = 
+  {
+    .description =	hc_name,
+    .product_desc =	product_desc,
+    .hcd_priv_size =	sizeof(struct crisv10_hcd),
+
+    /* Attaching IRQ handler manualy in probe() */
+    /* .irq =		crisv10_hcd_irq, */
+
+    .flags =		HCD_USB11,
+
+    /* called to init HCD and root hub */
+    .reset =		crisv10_hcd_reset,
+    .start =		crisv10_hcd_start,	
+
+    /* cleanly make HCD stop writing memory and doing I/O */
+    .stop =		crisv10_hcd_stop,
+
+    /* return current frame number */
+    .get_frame_number =	crisv10_hcd_get_frame,
+
+
+    /* Manage i/o requests via the Transfer Controller */
+    .urb_enqueue =	tc_urb_enqueue,
+    .urb_dequeue =	tc_urb_dequeue,
+
+    /* hw synch, freeing endpoint resources that urb_dequeue can't */
+    .endpoint_disable = tc_endpoint_disable,
+
+
+    /* Root Hub support */
+    .hub_status_data =	rh_status_data_request,
+    .hub_control =	rh_control_request,
+#ifdef CONFIG_PM
+    .hub_suspend =	rh_suspend_request,
+    .hub_resume =	rh_resume_request,
+#endif /* CONFIG_PM */
+#ifdef	CONFIG_USB_OTG
+    .start_port_reset =	crisv10_hcd_start_port_reset,
+#endif /* CONFIG_USB_OTG */
+  };
 
-/* Note that these functions are always available in their "__" variants, for use in
-   error situations. The "__" missing variants are controlled by the USB_DEBUG_DESC/
-   USB_DEBUG_URB macros. */
-static void __dump_urb(struct urb* purb)
-{
-	printk("\nurb                  :0x%08lx\n", (unsigned long)purb);
-	printk("dev                   :0x%08lx\n", (unsigned long)purb->dev);
-	printk("pipe                  :0x%08x\n", purb->pipe);
-	printk("status                :%d\n", purb->status);
-	printk("transfer_flags        :0x%08x\n", purb->transfer_flags);
-	printk("transfer_buffer       :0x%08lx\n", (unsigned long)purb->transfer_buffer);
-	printk("transfer_buffer_length:%d\n", purb->transfer_buffer_length);
-	printk("actual_length         :%d\n", purb->actual_length);
-	printk("setup_packet          :0x%08lx\n", (unsigned long)purb->setup_packet);
-	printk("start_frame           :%d\n", purb->start_frame);
-	printk("number_of_packets     :%d\n", purb->number_of_packets);
-	printk("interval              :%d\n", purb->interval);
-	printk("error_count           :%d\n", purb->error_count);
-	printk("context               :0x%08lx\n", (unsigned long)purb->context);
-	printk("complete              :0x%08lx\n\n", (unsigned long)purb->complete);
-}
 
-static void __dump_in_desc(volatile USB_IN_Desc_t *in)
-{
-	printk("\nUSB_IN_Desc at 0x%08lx\n", (unsigned long)in);
-	printk("  sw_len  : 0x%04x (%d)\n", in->sw_len, in->sw_len);
-	printk("  command : 0x%04x\n", in->command);
-	printk("  next    : 0x%08lx\n", in->next);
-	printk("  buf     : 0x%08lx\n", in->buf);
-	printk("  hw_len  : 0x%04x (%d)\n", in->hw_len, in->hw_len);
-	printk("  status  : 0x%04x\n\n", in->status);
-}
+/*
+ * conversion between pointers to a hcd and the corresponding
+ * crisv10_hcd 
+ */
 
-static void __dump_sb_desc(volatile USB_SB_Desc_t *sb)
+static inline struct crisv10_hcd *hcd_to_crisv10_hcd(struct usb_hcd *hcd)
 {
-	char tt = (sb->command & 0x30) >> 4;
-	char *tt_string;
-
-	switch (tt) {
-	case 0:
-		tt_string = "zout";
-		break;
-	case 1:
-		tt_string = "in";
-		break;
-	case 2:
-		tt_string = "out";
-		break;
-	case 3:
-		tt_string = "setup";
-		break;
-	default:
-		tt_string = "unknown (weird)";
-	}
-
-	printk("\n   USB_SB_Desc at 0x%08lx\n", (unsigned long)sb);
-	printk("     command : 0x%04x\n", sb->command);
-	printk("        rem     : %d\n", (sb->command & 0x3f00) >> 8);
-	printk("        full    : %d\n", (sb->command & 0x40) >> 6);
-	printk("        tt      : %d (%s)\n", tt, tt_string);
-	printk("        intr    : %d\n", (sb->command & 0x8) >> 3);
-	printk("        eot     : %d\n", (sb->command & 0x2) >> 1);
-	printk("        eol     : %d\n", sb->command & 0x1);
-	printk("     sw_len  : 0x%04x (%d)\n", sb->sw_len, sb->sw_len);
-	printk("     next    : 0x%08lx\n", sb->next);
-	printk("     buf     : 0x%08lx\n\n", sb->buf);
+	return (struct crisv10_hcd *) hcd->hcd_priv;
 }
 
-
-static void __dump_ep_desc(volatile USB_EP_Desc_t *ep)
+static inline struct usb_hcd *crisv10_hcd_to_hcd(struct crisv10_hcd *hcd)
 {
-	printk("\nUSB_EP_Desc at 0x%08lx\n", (unsigned long)ep);
-	printk("  command : 0x%04x\n", ep->command);
-	printk("     ep_id   : %d\n", (ep->command & 0x1f00) >> 8);
-	printk("     enable  : %d\n", (ep->command & 0x10) >> 4);
-	printk("     intr    : %d\n", (ep->command & 0x8) >> 3);
-	printk("     eof     : %d\n", (ep->command & 0x2) >> 1);
-	printk("     eol     : %d\n", ep->command & 0x1);
-	printk("  hw_len  : 0x%04x (%d)\n", ep->hw_len, ep->hw_len);
-	printk("  next    : 0x%08lx\n", ep->next);
-	printk("  sub     : 0x%08lx\n\n", ep->sub);
+	return container_of((void *) hcd, struct usb_hcd, hcd_priv);
 }
 
-static inline void __dump_ep_list(int pipe_type)
+/* check if specified port is in use */
+static inline int port_in_use(unsigned int port)
 {
-	volatile USB_EP_Desc_t *ep;
-	volatile USB_EP_Desc_t *first_ep;
-	volatile USB_SB_Desc_t *sb;
-
-	switch (pipe_type)
-	{
-	case PIPE_BULK:
-		first_ep = &TxBulkEPList[0];
-		break;
-	case PIPE_CONTROL:
-		first_ep = &TxCtrlEPList[0];
-		break;
-	case PIPE_INTERRUPT:
-		first_ep = &TxIntrEPList[0];
-		break;
-	case PIPE_ISOCHRONOUS:
-		first_ep = &TxIsocEPList[0];
-		break;
-	default:
-		warn("Cannot dump unknown traffic type");
-		return;
-	}
-	ep = first_ep;
-
-	printk("\n\nDumping EP list...\n\n");
-
-	do {
-		__dump_ep_desc(ep);
-		/* Cannot phys_to_virt on 0 as it turns into 80000000, which is != 0. */
-		sb = ep->sub ? phys_to_virt(ep->sub) : 0;
-		while (sb) {
-			__dump_sb_desc(sb);
-			sb = sb->next ? phys_to_virt(sb->next) : 0;
-		}
-		ep = (volatile USB_EP_Desc_t *)(phys_to_virt(ep->next));
-
-	} while (ep != first_ep);
+	return ports & (1 << port);
 }
 
-static inline void __dump_ept_data(int epid)
+/* number of ports in use */
+static inline unsigned int num_ports(void)
 {
-	unsigned long flags;
-	__u32 r_usb_ept_data;
-
-	if (epid < 0 || epid > 31) {
-		printk("Cannot dump ept data for invalid epid %d\n", epid);
-		return;
-	}
-
-	save_flags(flags);
-	cli();
-	*R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
-	nop();
-	r_usb_ept_data = *R_USB_EPT_DATA;
-	restore_flags(flags);
-
-	printk("\nR_USB_EPT_DATA = 0x%x for epid %d :\n", r_usb_ept_data, epid);
-	if (r_usb_ept_data == 0) {
-		/* No need for more detailed printing. */
-		return;
-	}
-	printk("  valid           : %d\n", (r_usb_ept_data & 0x80000000) >> 31);
-	printk("  hold            : %d\n", (r_usb_ept_data & 0x40000000) >> 30);
-	printk("  error_count_in  : %d\n", (r_usb_ept_data & 0x30000000) >> 28);
-	printk("  t_in            : %d\n", (r_usb_ept_data & 0x08000000) >> 27);
-	printk("  low_speed       : %d\n", (r_usb_ept_data & 0x04000000) >> 26);
-	printk("  port            : %d\n", (r_usb_ept_data & 0x03000000) >> 24);
-	printk("  error_code      : %d\n", (r_usb_ept_data & 0x00c00000) >> 22);
-	printk("  t_out           : %d\n", (r_usb_ept_data & 0x00200000) >> 21);
-	printk("  error_count_out : %d\n", (r_usb_ept_data & 0x00180000) >> 19);
-	printk("  max_len         : %d\n", (r_usb_ept_data & 0x0003f800) >> 11);
-	printk("  ep              : %d\n", (r_usb_ept_data & 0x00000780) >> 7);
-	printk("  dev             : %d\n", (r_usb_ept_data & 0x0000003f));
+	unsigned int i, num = 0;
+	for (i = 0; i < USB_ROOT_HUB_PORTS; i++)
+		if (port_in_use(i))
+			num++;
+	return num;
 }
 
-static inline void __dump_ept_data_list(void)
+/* map hub port number to the port number used internally by the HC */
+static inline unsigned int map_port(unsigned int port)
 {
-	int i;
-
-	printk("Dumping the whole R_USB_EPT_DATA list\n");
-
-	for (i = 0; i < 32; i++) {
-		__dump_ept_data(i);
-	}
+  unsigned int i, num = 0;
+  for (i = 0; i < USB_ROOT_HUB_PORTS; i++)
+    if (port_in_use(i))
+      if (++num == port)
+	return i;
+  return -1;
 }
-#ifdef USB_DEBUG_DESC
-#define dump_in_desc(...) __dump_in_desc(...)
-#define dump_sb_desc(...) __dump_sb_desc(...)
-#define dump_ep_desc(...) __dump_ep_desc(...)
-#else
-#define dump_in_desc(...) do {} while (0)
-#define dump_sb_desc(...) do {} while (0)
-#define dump_ep_desc(...) do {} while (0)
-#endif
 
-#ifdef USB_DEBUG_URB
-#define dump_urb(x)     __dump_urb(x)
-#else
-#define dump_urb(x)     do {} while (0)
+/* size of descriptors in slab cache */
+#ifndef MAX
+#define MAX(x, y)		((x) > (y) ? (x) : (y))
 #endif
 
-static void init_rx_buffers(void)
-{
-	int i;
 
-	DBFENTER;
+/******************************************************************/
+/* Hardware Interrupt functions                                   */
+/******************************************************************/
+
+/* Fast interrupt handler for HC */
+static irqreturn_t crisv10_hcd_top_irq(int irq, void *vcd)
+{
+  struct usb_hcd *hcd = vcd;
+  struct crisv10_irq_reg reg;
+  __u32 irq_mask;
+  unsigned long flags;
+
+  DBFENTER;
+
+  ASSERT(hcd != NULL);
+  reg.hcd = hcd;
+
+  /* Turn of other interrupts while handling these sensitive cases */
+  local_irq_save(flags);
+  
+  /* Read out which interrupts that are flaged */
+  irq_mask = *R_USB_IRQ_MASK_READ;
+  reg.r_usb_irq_mask_read = irq_mask;
+
+  /* Reading R_USB_STATUS clears the ctl_status interrupt. Note that
+     R_USB_STATUS must be read before R_USB_EPID_ATTN since reading the latter
+     clears the ourun and perror fields of R_USB_STATUS. */
+  reg.r_usb_status = *R_USB_STATUS;
+  
+  /* Reading R_USB_EPID_ATTN clears the iso_eof, bulk_eot and epid_attn
+     interrupts. */
+  reg.r_usb_epid_attn = *R_USB_EPID_ATTN;
+  
+  /* Reading R_USB_RH_PORT_STATUS_1 and R_USB_RH_PORT_STATUS_2 clears the
+     port_status interrupt. */
+  reg.r_usb_rh_port_status_1 = *R_USB_RH_PORT_STATUS_1;
+  reg.r_usb_rh_port_status_2 = *R_USB_RH_PORT_STATUS_2;
+  
+  /* Reading R_USB_FM_NUMBER clears the sof interrupt. */
+  /* Note: the lower 11 bits contain the actual frame number, sent with each
+     sof. */
+  reg.r_usb_fm_number = *R_USB_FM_NUMBER;
+
+  /* Interrupts are handled in order of priority. */
+  if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, port_status)) {
+    crisv10_hcd_port_status_irq(&reg);
+  }
+  if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, epid_attn)) {
+    crisv10_hcd_epid_attn_irq(&reg);
+  }
+  if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, ctl_status)) {
+    crisv10_hcd_ctl_status_irq(&reg);
+  }
+  if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, iso_eof)) {
+    crisv10_hcd_isoc_eof_irq(&reg);
+  }
+  if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, bulk_eot)) {
+    /* Update/restart the bulk start timer since obviously the channel is
+       running. */
+    mod_timer(&bulk_start_timer, jiffies + BULK_START_TIMER_INTERVAL);
+    /* Update/restart the bulk eot timer since we just received an bulk eot
+       interrupt. */
+    mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL);
+
+    /* Check for finished bulk transfers on epids */
+    check_finished_bulk_tx_epids(hcd, 0);
+  }
+  local_irq_restore(flags);
+
+  DBFEXIT;
+  return IRQ_HANDLED;
+}
+
+
+void crisv10_hcd_epid_attn_irq(struct crisv10_irq_reg *reg) {
+  struct usb_hcd *hcd = reg->hcd;
+  struct crisv10_urb_priv *urb_priv;
+  int epid;
+  DBFENTER;
+
+  for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
+    if (test_bit(epid, (void *)&reg->r_usb_epid_attn)) {
+      struct urb *urb;
+      __u32 ept_data;
+      int error_code;
+
+      if (epid == DUMMY_EPID || epid == INVALID_EPID) {
+	/* We definitely don't care about these ones. Besides, they are
+	   always disabled, so any possible disabling caused by the
+	   epid attention interrupt is irrelevant. */
+	warn("Got epid_attn for INVALID_EPID or DUMMY_EPID (%d).", epid);
+	continue;
+      }
+
+      if(!epid_inuse(epid)) {
+	irq_err("Epid attention on epid:%d that isn't in use\n", epid);
+	printk("R_USB_STATUS: 0x%x\n", reg->r_usb_status);
+	debug_epid(epid);
+	continue;
+      }
+
+      /* Note that although there are separate R_USB_EPT_DATA and
+	 R_USB_EPT_DATA_ISO registers, they are located at the same address and
+	 are of the same size. In other words, this read should be ok for isoc
+	 also. */
+      ept_data = etrax_epid_get(epid);
+      error_code = IO_EXTRACT(R_USB_EPT_DATA, error_code, ept_data);
+
+      /* Get the active URB for this epid. We blatantly assume
+	 that only this URB could have caused the epid attention. */
+      urb = activeUrbList[epid];
+      if (urb == NULL) {
+	irq_err("Attention on epid:%d error:%d with no active URB.\n",
+		epid, error_code);
+	printk("R_USB_STATUS: 0x%x\n", reg->r_usb_status);
+	debug_epid(epid);
+	continue;
+      }
+
+      urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+      ASSERT(urb_priv);
+
+      /* Using IO_STATE_VALUE on R_USB_EPT_DATA should be ok for isoc also. */
+      if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) {
+
+	/* Isoc traffic doesn't have error_count_in/error_count_out. */
+	if ((usb_pipetype(urb->pipe) != PIPE_ISOCHRONOUS) &&
+	    (IO_EXTRACT(R_USB_EPT_DATA, error_count_in, ept_data) == 3 ||
+	     IO_EXTRACT(R_USB_EPT_DATA, error_count_out, ept_data) == 3)) {
+	  /* Check if URB allready is marked for late-finish, we can get
+	     several 3rd error for Intr traffic when a device is unplugged */
+	  if(urb_priv->later_data == NULL) {
+	    /* 3rd error. */
+	    irq_warn("3rd error for epid:%d (%s %s) URB:0x%x[%d]\n", epid,
+		     str_dir(urb->pipe), str_type(urb->pipe),
+		     (unsigned int)urb, urb_priv->urb_num);
+	  
+	    tc_finish_urb_later(hcd, urb, -EPROTO);
+	  }
+
+	} else if (reg->r_usb_status & IO_MASK(R_USB_STATUS, perror)) {
+	  irq_warn("Perror for epid:%d\n", epid);
+	  printk("FM_NUMBER: %d\n", reg->r_usb_fm_number & 0x7ff);
+	  printk("R_USB_STATUS: 0x%x\n", reg->r_usb_status);
+	  __dump_urb(urb);
+	  debug_epid(epid);
+
+	  if (!(ept_data & IO_MASK(R_USB_EPT_DATA, valid))) {
+	    /* invalid ep_id */
+	    panic("Perror because of invalid epid."
+		  " Deconfigured too early?");
+	  } else {
+	    /* past eof1, near eof, zout transfer, setup transfer */
+	    /* Dump the urb and the relevant EP descriptor. */
+	    panic("Something wrong with DMA descriptor contents."
+		  " Too much traffic inserted?");
+	  }
+	} else if (reg->r_usb_status & IO_MASK(R_USB_STATUS, ourun)) {
+	  /* buffer ourun */
+	  printk("FM_NUMBER: %d\n", reg->r_usb_fm_number & 0x7ff);
+	  printk("R_USB_STATUS: 0x%x\n", reg->r_usb_status);
+	  __dump_urb(urb);
+	  debug_epid(epid);
 
-	for (i = 0; i < (NBR_OF_RX_DESC - 1); i++) {
-		RxDescList[i].sw_len = RX_DESC_BUF_SIZE;
-		RxDescList[i].command = 0;
-		RxDescList[i].next = virt_to_phys(&RxDescList[i + 1]);
-		RxDescList[i].buf = virt_to_phys(RxBuf + (i * RX_DESC_BUF_SIZE));
-		RxDescList[i].hw_len = 0;
-		RxDescList[i].status = 0;
-
-		/* DMA IN cache bug. (struct etrax_dma_descr has the same layout as USB_IN_Desc
-		   for the relevant fields.) */
-		prepare_rx_descriptor((struct etrax_dma_descr*)&RxDescList[i]);
+	  panic("Buffer overrun/underrun for epid:%d. DMA too busy?", epid);
+	} else {
+	  irq_warn("Attention on epid:%d (%s %s) with no error code\n", epid,
+		   str_dir(urb->pipe), str_type(urb->pipe));
+	  printk("R_USB_STATUS: 0x%x\n", reg->r_usb_status);
+	  __dump_urb(urb);
+	  debug_epid(epid);
+	}
 
+      } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code,
+					      stall)) {
+	/* Not really a protocol error, just says that the endpoint gave
+	   a stall response. Note that error_code cannot be stall for isoc. */
+	if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
+	  panic("Isoc traffic cannot stall");
 	}
 
-	RxDescList[i].sw_len = RX_DESC_BUF_SIZE;
-	RxDescList[i].command = IO_STATE(USB_IN_command, eol, yes);
-	RxDescList[i].next = virt_to_phys(&RxDescList[0]);
-	RxDescList[i].buf = virt_to_phys(RxBuf + (i * RX_DESC_BUF_SIZE));
-	RxDescList[i].hw_len = 0;
-	RxDescList[i].status = 0;
+	tc_dbg("Stall for epid:%d (%s %s) URB:0x%x\n", epid,
+	       str_dir(urb->pipe), str_type(urb->pipe), (unsigned int)urb);
+	tc_finish_urb(hcd, urb, -EPIPE);
+
+      } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code,
+					      bus_error)) {
+	/* Two devices responded to a transaction request. Must be resolved
+	   by software. FIXME: Reset ports? */
+	panic("Bus error for epid %d."
+	      " Two devices responded to transaction request\n",
+	      epid);
+
+      } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code,
+					      buffer_error)) {
+	/* DMA overrun or underrun. */
+	irq_warn("Buffer overrun/underrun for epid:%d (%s %s)\n", epid,
+		 str_dir(urb->pipe), str_type(urb->pipe));
+
+	/* It seems that error_code = buffer_error in
+	   R_USB_EPT_DATA/R_USB_EPT_DATA_ISO and ourun = yes in R_USB_STATUS
+	   are the same error. */
+	tc_finish_urb(hcd, urb, -EPROTO);
+      } else {
+	  irq_warn("Unknown attention on epid:%d (%s %s)\n", epid,
+		   str_dir(urb->pipe), str_type(urb->pipe));
+	  dump_ept_data(epid);
+      }
+    }
+  }
+  DBFEXIT;
+}
+
+void crisv10_hcd_port_status_irq(struct crisv10_irq_reg *reg)
+{
+  __u16 port_reg[USB_ROOT_HUB_PORTS];
+  DBFENTER;
+  port_reg[0] = reg->r_usb_rh_port_status_1;
+  port_reg[1] = reg->r_usb_rh_port_status_2;
+  rh_port_status_change(port_reg);
+  DBFEXIT;
+}
+
+void crisv10_hcd_isoc_eof_irq(struct crisv10_irq_reg *reg)
+{
+  int epid;
+  struct urb *urb;
+  struct crisv10_urb_priv *urb_priv;
+
+  DBFENTER;
+
+  for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) {
+
+    /* Only check epids that are in use, is valid and has SB list */
+    if (!epid_inuse(epid) || epid == INVALID_EPID ||
+	TxIsocEPList[epid].sub == 0 || epid == DUMMY_EPID) {
+      /* Nothing here to see. */
+      continue;
+    }
+    ASSERT(epid_isoc(epid));
+
+    /* Get the active URB for this epid (if any). */
+    urb = activeUrbList[epid];
+    if (urb == 0) {
+      isoc_warn("Ignoring NULL urb for epid:%d\n", epid);
+      continue;
+    }
+    if(!epid_out_traffic(epid)) {
+      /* Sanity check. */
+      ASSERT(usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS);
+
+      urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+      ASSERT(urb_priv);
+
+      if (urb_priv->urb_state == NOT_STARTED) {
+	/* If ASAP is not set and urb->start_frame is the current frame,
+	   start the transfer. */
+	if (!(urb->transfer_flags & URB_ISO_ASAP) &&
+	    (urb->start_frame == (*R_USB_FM_NUMBER & 0x7ff))) {
+	  /* EP should not be enabled if we're waiting for start_frame */
+	  ASSERT((TxIsocEPList[epid].command &
+		  IO_STATE(USB_EP_command, enable, yes)) == 0);
+
+	  isoc_warn("Enabling isoc IN EP descr for epid %d\n", epid);
+	  TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
+
+	  /* This urb is now active. */
+	  urb_priv->urb_state = STARTED;
+	  continue;
+	}
+      }
+    }
+  }
+
+  DBFEXIT;
+}
+
+void crisv10_hcd_ctl_status_irq(struct crisv10_irq_reg *reg)
+{
+  struct crisv10_hcd* crisv10_hcd = hcd_to_crisv10_hcd(reg->hcd);
+
+  DBFENTER;
+  ASSERT(crisv10_hcd);
+
+  irq_dbg("ctr_status_irq, controller status: %s\n",
+	  hcd_status_to_str(reg->r_usb_status));
+  
+  /* FIXME: What should we do if we get ourun or perror? Dump the EP and SB
+     list for the corresponding epid? */
+  if (reg->r_usb_status & IO_MASK(R_USB_STATUS, ourun)) {
+    panic("USB controller got ourun.");
+  }
+  if (reg->r_usb_status & IO_MASK(R_USB_STATUS, perror)) {
+    
+    /* Before, etrax_usb_do_intr_recover was called on this epid if it was
+       an interrupt pipe. I don't see how re-enabling all EP descriptors
+       will help if there was a programming error. */
+    panic("USB controller got perror.");
+  }
+
+  /* Keep track of USB Controller, if it's running or not */
+  if(reg->r_usb_status & IO_STATE(R_USB_STATUS, running, yes)) {
+    crisv10_hcd->running = 1;
+  } else {
+    crisv10_hcd->running = 0;
+  }
+  
+  if (reg->r_usb_status & IO_MASK(R_USB_STATUS, device_mode)) {
+    /* We should never operate in device mode. */
+    panic("USB controller in device mode.");
+  }
+
+  /* Set the flag to avoid getting "Unlink after no-IRQ? Controller is probably
+     using the wrong IRQ" from hcd_unlink_urb() in drivers/usb/core/hcd.c */
+  set_bit(HCD_FLAG_SAW_IRQ, &reg->hcd->flags);
+  
+  DBFEXIT;
+}
+
+
+/******************************************************************/
+/* Host Controller interface functions                            */
+/******************************************************************/
+
+static inline void crisv10_ready_wait(void) {
+  volatile int timeout = 10000;
+  /* Check the busy bit of USB controller in Etrax */
+  while((*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)) &&
+	(timeout-- > 0));
+  if(timeout == 0) {
+    warn("Timeout while waiting for USB controller to be idle\n");
+  }
+}
+
+/* reset host controller */
+static int crisv10_hcd_reset(struct usb_hcd *hcd)
+{
+  DBFENTER;
+  hcd_dbg(hcd, "reset\n");
+
+
+  /* Reset the USB interface. */
+  /*
+  *R_USB_COMMAND =
+    IO_STATE(R_USB_COMMAND, port_sel, nop) |
+    IO_STATE(R_USB_COMMAND, port_cmd, reset) |
+    IO_STATE(R_USB_COMMAND, ctrl_cmd, reset);
+  nop();
+  */
+  DBFEXIT;
+  return 0;
+}
+
+/* start host controller */
+static int crisv10_hcd_start(struct usb_hcd *hcd)
+{
+  DBFENTER;
+  hcd_dbg(hcd, "start\n");
+
+  crisv10_ready_wait();
+
+  /* Start processing of USB traffic. */
+  *R_USB_COMMAND =
+    IO_STATE(R_USB_COMMAND, port_sel, nop) |
+    IO_STATE(R_USB_COMMAND, port_cmd, reset) |
+    IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run);
+
+  nop();
+
+  hcd->state = HC_STATE_RUNNING;
+
+  DBFEXIT;
+  return 0;
+}
+
+/* stop host controller */
+static void crisv10_hcd_stop(struct usb_hcd *hcd)
+{
+  DBFENTER;
+  hcd_dbg(hcd, "stop\n");
+  crisv10_hcd_reset(hcd);
+  DBFEXIT;
+}
+
+/* return the current frame number */
+static int crisv10_hcd_get_frame(struct usb_hcd *hcd)
+{
+  DBFENTER;
+  DBFEXIT;
+  return (*R_USB_FM_NUMBER & 0x7ff);
+}
+
+#ifdef	CONFIG_USB_OTG
+
+static int crisv10_hcd_start_port_reset(struct usb_hcd *hcd, unsigned port)
+{
+  return 0; /* no-op for now */
+}
+
+#endif /* CONFIG_USB_OTG */
+
+
+/******************************************************************/
+/* Root Hub functions                                             */
+/******************************************************************/
+
+/* root hub status */
+static const struct usb_hub_status rh_hub_status = 
+  {
+    .wHubStatus =		0,
+    .wHubChange =		0,
+  };
+
+/* root hub descriptor */
+static const u8 rh_hub_descr[] =
+  {
+    0x09,			/* bDescLength	       */
+    0x29,			/* bDescriptorType     */
+    USB_ROOT_HUB_PORTS,         /* bNbrPorts	       */
+    0x00,			/* wHubCharacteristics */
+    0x00,		 
+    0x01,			/* bPwrOn2pwrGood      */
+    0x00,			/* bHubContrCurrent    */
+    0x00,			/* DeviceRemovable     */
+    0xff			/* PortPwrCtrlMask     */
+  };
+
+/* Actual holder of root hub status*/
+struct crisv10_rh rh;
+
+/* Initialize root hub data structures (called from dvdrv_hcd_probe()) */
+int rh_init(void) {
+  int i;
+  /* Reset port status flags */
+  for (i = 0; i < USB_ROOT_HUB_PORTS; i++) {
+    rh.wPortChange[i] = 0;
+    rh.wPortStatusPrev[i] = 0;
+  }
+  return 0;
+}
+
+#define RH_FEAT_MASK ((1<<USB_PORT_FEAT_CONNECTION)|\
+		      (1<<USB_PORT_FEAT_ENABLE)|\
+		      (1<<USB_PORT_FEAT_SUSPEND)|\
+		      (1<<USB_PORT_FEAT_RESET))
+
+/* Handle port status change interrupt (called from bottom part interrupt) */
+void rh_port_status_change(__u16 port_reg[]) {
+  int i;
+  __u16 wChange;
+
+  for(i = 0; i < USB_ROOT_HUB_PORTS; i++) {
+    /* Xor out changes since last read, masked for important flags */
+    wChange = (port_reg[i] & RH_FEAT_MASK) ^ rh.wPortStatusPrev[i];
+    /* Or changes together with (if any) saved changes */
+    rh.wPortChange[i] |= wChange;
+    /* Save new status */
+    rh.wPortStatusPrev[i] = port_reg[i];
+
+    if(wChange) {
+      rh_dbg("Interrupt port_status change port%d: %s  Current-status:%s\n", i+1,
+	     port_status_to_str(wChange),
+	     port_status_to_str(port_reg[i]));
+    }
+  }
+}
+
+/* Construct port status change bitmap for the root hub */
+static int rh_status_data_request(struct usb_hcd *hcd, char *buf)
+{
+  struct crisv10_hcd* crisv10_hcd = hcd_to_crisv10_hcd(hcd);
+  unsigned int i;
+
+  DBFENTER;
+  /*
+   * corresponds to hub status change EP (USB 2.0 spec section 11.13.4)
+   * return bitmap indicating ports with status change
+   */
+  *buf = 0;
+  spin_lock(&crisv10_hcd->lock);
+  for (i = 1; i <= crisv10_hcd->num_ports; i++) {
+    if (rh.wPortChange[map_port(i)]) {
+      *buf |= (1 << i);
+      rh_dbg("rh_status_data_request, change on port %d: %s  Current Status: %s\n", i,
+	     port_status_to_str(rh.wPortChange[map_port(i)]),
+	     port_status_to_str(rh.wPortStatusPrev[map_port(i)]));
+    }
+  }
+  spin_unlock(&crisv10_hcd->lock);
+  DBFEXIT;
+  return *buf == 0 ? 0 : 1;
+}
+
+/* Handle a control request for the root hub (called from hcd_driver) */
+static int rh_control_request(struct usb_hcd *hcd, 
+			      u16 typeReq, 
+			      u16 wValue, 
+			      u16 wIndex,
+			      char *buf, 
+			      u16 wLength) {
+
+  struct crisv10_hcd *crisv10_hcd = hcd_to_crisv10_hcd(hcd);
+  int retval = 0;
+  int len;
+  DBFENTER;
+
+  switch (typeReq) {
+  case GetHubDescriptor:
+    rh_dbg("GetHubDescriptor\n");
+    len = min_t(unsigned int, sizeof rh_hub_descr, wLength);
+    memcpy(buf, rh_hub_descr, len);
+    buf[2] = crisv10_hcd->num_ports;
+    break;
+  case GetHubStatus:
+    rh_dbg("GetHubStatus\n");
+    len = min_t(unsigned int, sizeof rh_hub_status, wLength);
+    memcpy(buf, &rh_hub_status, len);
+    break;
+  case GetPortStatus:
+    if (!wIndex || wIndex > crisv10_hcd->num_ports)
+      goto error;
+    rh_dbg("GetportStatus, port:%d change:%s  status:%s\n", wIndex,
+	   port_status_to_str(rh.wPortChange[map_port(wIndex)]),
+	   port_status_to_str(rh.wPortStatusPrev[map_port(wIndex)]));
+    *(u16 *) buf = cpu_to_le16(rh.wPortStatusPrev[map_port(wIndex)]);
+    *(u16 *) (buf + 2) = cpu_to_le16(rh.wPortChange[map_port(wIndex)]);
+    break;
+  case SetHubFeature:
+    rh_dbg("SetHubFeature\n");
+  case ClearHubFeature:
+    rh_dbg("ClearHubFeature\n");
+    switch (wValue) {
+    case C_HUB_OVER_CURRENT:
+    case C_HUB_LOCAL_POWER:
+      rh_warn("Not implemented hub request:%d \n", typeReq);
+      /* not implemented */
+      break;
+    default:
+      goto error;
+    }
+    break;
+  case SetPortFeature:
+    if (!wIndex || wIndex > crisv10_hcd->num_ports)
+      goto error;
+    if(rh_set_port_feature(map_port(wIndex), wValue))
+      goto error;
+    break;
+  case ClearPortFeature:
+    if (!wIndex || wIndex > crisv10_hcd->num_ports)
+      goto error;
+    if(rh_clear_port_feature(map_port(wIndex), wValue))
+      goto error;
+    break;
+  default:
+    rh_warn("Unknown hub request: %d\n", typeReq);
+  error:
+    retval = -EPIPE;
+  }
+  DBFEXIT;
+  return retval;
+}
+
+int rh_set_port_feature(__u8 bPort, __u16 wFeature) {
+  __u8 bUsbCommand = 0;
+  switch(wFeature) {
+  case USB_PORT_FEAT_RESET:
+    rh_dbg("SetPortFeature: reset\n");
+    bUsbCommand |= IO_STATE(R_USB_COMMAND, port_cmd, reset);
+    goto set;
+    break;
+  case USB_PORT_FEAT_SUSPEND:
+    rh_dbg("SetPortFeature: suspend\n");
+    bUsbCommand |= IO_STATE(R_USB_COMMAND, port_cmd, suspend);
+    goto set;
+    break;
+  case USB_PORT_FEAT_POWER:
+    rh_dbg("SetPortFeature: power\n");
+    break;
+  case USB_PORT_FEAT_C_CONNECTION:
+    rh_dbg("SetPortFeature: c_connection\n");
+    break;
+  case USB_PORT_FEAT_C_RESET:
+    rh_dbg("SetPortFeature: c_reset\n");
+    break;
+  case USB_PORT_FEAT_C_OVER_CURRENT:
+    rh_dbg("SetPortFeature: c_over_current\n");
+    break;
+
+  set:
+    /* Select which port via the port_sel field */
+    bUsbCommand |= IO_FIELD(R_USB_COMMAND, port_sel, bPort+1);
+
+    /* Make sure the controller isn't busy. */
+    crisv10_ready_wait();
+    /* Send out the actual command to the USB controller */
+    *R_USB_COMMAND = bUsbCommand;
+
+    /* If port reset then also bring USB controller into running state */
+    if(wFeature == USB_PORT_FEAT_RESET) {
+      /* Wait a while for controller to first become started after port reset */
+      udelay(12000); /* 12ms blocking wait */
+      
+      /* Make sure the controller isn't busy. */
+      crisv10_ready_wait();
+
+      /* If all enabled ports were disabled the host controller goes down into
+	 started mode, so we need to bring it back into the running state.
+	 (This is safe even if it's already in the running state.) */
+      *R_USB_COMMAND =
+	IO_STATE(R_USB_COMMAND, port_sel, nop) |
+	IO_STATE(R_USB_COMMAND, port_cmd, reset) |
+	IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run);
+    }
+
+    break;
+  default:
+    rh_dbg("SetPortFeature: unknown feature\n");
+    return -1;
+  }
+  return 0;
+}
+
+int rh_clear_port_feature(__u8 bPort, __u16 wFeature) {
+  switch(wFeature) {
+  case USB_PORT_FEAT_ENABLE:
+    rh_dbg("ClearPortFeature: enable\n");
+    rh_disable_port(bPort);
+    break;
+  case USB_PORT_FEAT_SUSPEND:
+    rh_dbg("ClearPortFeature: suspend\n");
+    break;
+  case USB_PORT_FEAT_POWER:
+    rh_dbg("ClearPortFeature: power\n");
+    break;
+
+  case USB_PORT_FEAT_C_ENABLE:
+    rh_dbg("ClearPortFeature: c_enable\n");
+    goto clear;
+  case USB_PORT_FEAT_C_SUSPEND:
+    rh_dbg("ClearPortFeature: c_suspend\n");
+    goto clear;
+  case USB_PORT_FEAT_C_CONNECTION:
+    rh_dbg("ClearPortFeature: c_connection\n");
+    goto clear;
+  case USB_PORT_FEAT_C_OVER_CURRENT:
+    rh_dbg("ClearPortFeature: c_over_current\n");
+    goto clear;
+  case USB_PORT_FEAT_C_RESET:
+    rh_dbg("ClearPortFeature: c_reset\n");
+    goto clear;
+  clear:
+    rh.wPortChange[bPort] &= ~(1 << (wFeature - 16));
+    break;
+  default:
+    rh_dbg("ClearPortFeature: unknown feature\n");
+    return -1;
+  }
+  return 0;
+}
+
+
+#ifdef	CONFIG_PM
+/* Handle a suspend request for the root hub (called from hcd_driver) */
+static int rh_suspend_request(struct usb_hcd *hcd)
+{
+  return 0; /* no-op for now */
+}
+
+/* Handle a resume request for the root hub (called from hcd_driver) */
+static int rh_resume_request(struct usb_hcd *hcd)
+{
+  return 0; /* no-op for now */
+}
+#endif /* CONFIG_PM */
+
+
+
+/* Wrapper function for workaround port disable registers in USB controller  */
+static void rh_disable_port(unsigned int port) {
+  volatile int timeout = 10000;
+  volatile char* usb_portx_disable;
+  switch(port) {
+  case 0:
+    usb_portx_disable = R_USB_PORT1_DISABLE;
+    break;
+  case 1:
+    usb_portx_disable = R_USB_PORT2_DISABLE;
+    break;
+  default:
+    /* Invalid port index */
+    return;
+  }
+  /* Set disable flag in special register  */
+  *usb_portx_disable = IO_STATE(R_USB_PORT1_DISABLE, disable, yes);
+  /* Wait until not enabled anymore */
+  while((rh.wPortStatusPrev[port] &
+	IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes)) &&
+	(timeout-- > 0));
+  if(timeout == 0) {
+    warn("Timeout while waiting for port %d to become disabled\n", port);
+  }
+  /* clear disable flag in special register  */
+  *usb_portx_disable = IO_STATE(R_USB_PORT1_DISABLE, disable, no);
+  rh_info("Physical port %d disabled\n", port+1);
+}
+
+
+/******************************************************************/
+/* Transfer Controller (TC) functions                             */
+/******************************************************************/
+
+/* FIXME: Should RX_BUF_SIZE be a config option, or maybe we should adjust it
+   dynamically?
+   To adjust it dynamically we would have to get an interrupt when we reach
+   the end of the rx descriptor list, or when we get close to the end, and
+   then allocate more descriptors. */
+#define NBR_OF_RX_DESC     512
+#define RX_DESC_BUF_SIZE   1024
+#define RX_BUF_SIZE        (NBR_OF_RX_DESC * RX_DESC_BUF_SIZE)
 
-	myNextRxDesc = &RxDescList[0];
-	myLastRxDesc = &RxDescList[NBR_OF_RX_DESC - 1];
-	myPrevRxDesc = &RxDescList[NBR_OF_RX_DESC - 1];
 
-	*R_DMA_CH9_FIRST = virt_to_phys(myNextRxDesc);
-	*R_DMA_CH9_CMD = IO_STATE(R_DMA_CH9_CMD, cmd, start);
+/* Local variables for Transfer Controller */
+/* --------------------------------------- */
 
-	DBFEXIT;
-}
+/* This is a circular (double-linked) list of the active urbs for each epid.
+   The head is never removed, and new urbs are linked onto the list as
+   urb_entry_t elements. Don't reference urb_list directly; use the wrapper
+   functions instead (which includes spin_locks) */
+static struct list_head urb_list[NBR_OF_EPIDS];
 
-static void init_tx_bulk_ep(void)
-{
-	int i;
+/* Read about the need and usage of this lock in submit_ctrl_urb. */
+/* Lock for URB lists for each EPID */
+static spinlock_t urb_list_lock;
 
-	DBFENTER;
+/* Lock for EPID array register (R_USB_EPT_x) in Etrax */
+static spinlock_t etrax_epid_lock;
 
-	for (i = 0; i < (NBR_OF_EPIDS - 1); i++) {
-		CHECK_ALIGN(&TxBulkEPList[i]);
-		TxBulkEPList[i].hw_len = 0;
-		TxBulkEPList[i].command = IO_FIELD(USB_EP_command, epid, i);
-		TxBulkEPList[i].sub = 0;
-		TxBulkEPList[i].next = virt_to_phys(&TxBulkEPList[i + 1]);
-
-		/* Initiate two EPs, disabled and with the eol flag set. No need for any
-		   preserved epid. */
-
-		/* The first one has the intr flag set so we get an interrupt when the DMA
-		   channel is about to become disabled. */
-		CHECK_ALIGN(&TxBulkDummyEPList[i][0]);
-		TxBulkDummyEPList[i][0].hw_len = 0;
-		TxBulkDummyEPList[i][0].command = (IO_FIELD(USB_EP_command, epid, DUMMY_EPID) |
-						   IO_STATE(USB_EP_command, eol, yes) |
-						   IO_STATE(USB_EP_command, intr, yes));
-		TxBulkDummyEPList[i][0].sub = 0;
-		TxBulkDummyEPList[i][0].next = virt_to_phys(&TxBulkDummyEPList[i][1]);
-
-		/* The second one. */
-		CHECK_ALIGN(&TxBulkDummyEPList[i][1]);
-		TxBulkDummyEPList[i][1].hw_len = 0;
-		TxBulkDummyEPList[i][1].command = (IO_FIELD(USB_EP_command, epid, DUMMY_EPID) |
-						   IO_STATE(USB_EP_command, eol, yes));
-		TxBulkDummyEPList[i][1].sub = 0;
-		/* The last dummy's next pointer is the same as the current EP's next pointer. */
-		TxBulkDummyEPList[i][1].next = virt_to_phys(&TxBulkEPList[i + 1]);
-	}
+/* Lock for dma8 sub0 handling */
+static spinlock_t etrax_dma8_sub0_lock;
 
-	/* Configure the last one. */
-	CHECK_ALIGN(&TxBulkEPList[i]);
-	TxBulkEPList[i].hw_len = 0;
-	TxBulkEPList[i].command = (IO_STATE(USB_EP_command, eol, yes) |
-				   IO_FIELD(USB_EP_command, epid, i));
-	TxBulkEPList[i].sub = 0;
-	TxBulkEPList[i].next = virt_to_phys(&TxBulkEPList[0]);
-
-	/* No need configuring dummy EPs for the last one as it will never be used for
-	   bulk traffic (i == INVALD_EPID at this point). */
-
-	/* Set up to start on the last EP so we will enable it when inserting traffic
-	   for the first time (imitating the situation where the DMA has stopped
-	   because there was no more traffic). */
-	*R_DMA_CH8_SUB0_EP = virt_to_phys(&TxBulkEPList[i]);
-	/* No point in starting the bulk channel yet.
-	 *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start); */
-	DBFEXIT;
-}
+/* DMA IN cache bug. Align the DMA IN buffers to 32 bytes, i.e. a cache line.
+   Since RX_DESC_BUF_SIZE is 1024 is a multiple of 32, all rx buffers will be
+   cache aligned. */
+static volatile unsigned char RxBuf[RX_BUF_SIZE] __attribute__ ((aligned (32)));
+static volatile struct USB_IN_Desc RxDescList[NBR_OF_RX_DESC] __attribute__ ((aligned (4)));
 
-static void init_tx_ctrl_ep(void)
-{
-	int i;
+/* Pointers into RxDescList. */
+static volatile struct USB_IN_Desc *myNextRxDesc;
+static volatile struct USB_IN_Desc *myLastRxDesc;
 
-	DBFENTER;
+/* A zout transfer makes a memory access at the address of its buf pointer,
+   which means that setting this buf pointer to 0 will cause an access to the
+   flash. In addition to this, setting sw_len to 0 results in a 16/32 bytes
+   (depending on DMA burst size) transfer.
+   Instead, we set it to 1, and point it to this buffer. */
+static int zout_buffer[4] __attribute__ ((aligned (4)));
 
-	for (i = 0; i < (NBR_OF_EPIDS - 1); i++) {
-		CHECK_ALIGN(&TxCtrlEPList[i]);
-		TxCtrlEPList[i].hw_len = 0;
-		TxCtrlEPList[i].command = IO_FIELD(USB_EP_command, epid, i);
-		TxCtrlEPList[i].sub = 0;
-		TxCtrlEPList[i].next = virt_to_phys(&TxCtrlEPList[i + 1]);
-	}
+/* Cache for allocating new EP and SB descriptors. */
+static kmem_cache_t *usb_desc_cache;
 
-	CHECK_ALIGN(&TxCtrlEPList[i]);
-	TxCtrlEPList[i].hw_len = 0;
-	TxCtrlEPList[i].command = (IO_STATE(USB_EP_command, eol, yes) |
-				   IO_FIELD(USB_EP_command, epid, i));
+/* Cache for the data allocated in the isoc descr top half. */
+static kmem_cache_t *isoc_compl_cache;
 
-	TxCtrlEPList[i].sub = 0;
-	TxCtrlEPList[i].next = virt_to_phys(&TxCtrlEPList[0]);
+/* Cache for the data allocated when delayed finishing of URBs */
+static kmem_cache_t *later_data_cache;
 
-	*R_DMA_CH8_SUB1_EP = virt_to_phys(&TxCtrlEPList[0]);
-	*R_DMA_CH8_SUB1_CMD = IO_STATE(R_DMA_CH8_SUB1_CMD, cmd, start);
 
-	DBFEXIT;
+/* Counter to keep track of how many Isoc EP we have sat up. Used to enable
+   and disable iso_eof interrupt. We only need these interrupts when we have
+   Isoc data endpoints (consumes CPU cycles).
+   FIXME: This could be more fine granular, so this interrupt is only enabled
+   when we have a In Isoc URB not URB_ISO_ASAP flaged queued. */
+static int isoc_epid_counter;
+
+/* Protecting wrapper functions for R_USB_EPT_x */
+/* -------------------------------------------- */
+static inline void etrax_epid_set(__u8 index, __u32 data) {
+  unsigned long flags;
+  spin_lock_irqsave(&etrax_epid_lock, flags);
+  *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, index);
+  nop();
+  *R_USB_EPT_DATA = data;
+  spin_unlock_irqrestore(&etrax_epid_lock, flags);
+}
+
+static inline void etrax_epid_clear_error(__u8 index) {
+  unsigned long flags;
+  spin_lock_irqsave(&etrax_epid_lock, flags);
+  *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, index);
+  nop();
+  *R_USB_EPT_DATA &=
+    ~(IO_MASK(R_USB_EPT_DATA, error_count_in) |
+      IO_MASK(R_USB_EPT_DATA, error_count_out) |
+      IO_MASK(R_USB_EPT_DATA, error_code));
+  spin_unlock_irqrestore(&etrax_epid_lock, flags);
+}
+
+static inline void etrax_epid_set_toggle(__u8 index, __u8 dirout,
+                                             __u8 toggle) {
+  unsigned long flags;
+  spin_lock_irqsave(&etrax_epid_lock, flags);
+  *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, index);
+  nop();
+  if(dirout) {
+    *R_USB_EPT_DATA &= ~IO_MASK(R_USB_EPT_DATA, t_out);
+    *R_USB_EPT_DATA |= IO_FIELD(R_USB_EPT_DATA, t_out, toggle);
+  } else {
+    *R_USB_EPT_DATA &= ~IO_MASK(R_USB_EPT_DATA, t_in);
+    *R_USB_EPT_DATA |= IO_FIELD(R_USB_EPT_DATA, t_in, toggle);
+  }
+  spin_unlock_irqrestore(&etrax_epid_lock, flags);
+}
+
+static inline __u8 etrax_epid_get_toggle(__u8 index, __u8 dirout) {
+  unsigned long flags;
+  __u8 toggle;
+  spin_lock_irqsave(&etrax_epid_lock, flags);
+  *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, index);
+  nop();
+  if (dirout) {
+    toggle = IO_EXTRACT(R_USB_EPT_DATA, t_out, *R_USB_EPT_DATA);
+  } else {
+    toggle = IO_EXTRACT(R_USB_EPT_DATA, t_in, *R_USB_EPT_DATA);
+  }
+  spin_unlock_irqrestore(&etrax_epid_lock, flags);
+  return toggle;
+}
+
+
+static inline __u32 etrax_epid_get(__u8 index) {
+  unsigned long flags;
+  __u32 data;
+  spin_lock_irqsave(&etrax_epid_lock, flags);
+  *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, index);
+  nop();
+  data = *R_USB_EPT_DATA;
+  spin_unlock_irqrestore(&etrax_epid_lock, flags);
+  return data;
+}
+
+
+
+
+/* Main functions for Transfer Controller */
+/* -------------------------------------- */
+
+/* Init structs, memories and lists used by Transfer Controller */
+int tc_init(struct usb_hcd *hcd) {
+  int i;
+  /* Clear software state info for all epids */
+  memset(epid_state, 0, sizeof(struct etrax_epid) * NBR_OF_EPIDS);
+
+  /* Set Invalid and Dummy as being in use and disabled */
+  epid_state[INVALID_EPID].inuse = 1;
+  epid_state[DUMMY_EPID].inuse = 1;
+  epid_state[INVALID_EPID].disabled = 1;
+  epid_state[DUMMY_EPID].disabled = 1;
+
+  /* Clear counter for how many Isoc epids we have sat up */
+  isoc_epid_counter = 0;
+
+  /* Initialize the urb list by initiating a head for each list.
+     Also reset list hodling active URB for each epid */
+  for (i = 0; i < NBR_OF_EPIDS; i++) {
+    INIT_LIST_HEAD(&urb_list[i]);
+    activeUrbList[i] = NULL;
+  }
+
+  /* Init lock for URB lists */
+  spin_lock_init(&urb_list_lock);
+  /* Init lock for Etrax R_USB_EPT register */
+  spin_lock_init(&etrax_epid_lock);
+  /* Init lock for Etrax dma8 sub0 handling */
+  spin_lock_init(&etrax_dma8_sub0_lock);
+
+  /* We use kmem_cache_* to make sure that all DMA desc. are dword aligned */
+
+  /* Note that we specify sizeof(struct USB_EP_Desc) as the size, but also
+     allocate SB descriptors from this cache. This is ok since
+     sizeof(struct USB_EP_Desc) == sizeof(struct USB_SB_Desc). */
+  usb_desc_cache = kmem_cache_create("usb_desc_cache",
+				     sizeof(struct USB_EP_Desc), 0,
+				     SLAB_HWCACHE_ALIGN, 0, 0);
+  if(usb_desc_cache == NULL) {
+    return -ENOMEM;
+  }
+
+  /* Create slab cache for speedy allocation of memory for isoc bottom-half
+     interrupt handling */
+  isoc_compl_cache =
+    kmem_cache_create("isoc_compl_cache",
+		      sizeof(struct crisv10_isoc_complete_data),
+		      0, SLAB_HWCACHE_ALIGN, 0, 0);
+  if(isoc_compl_cache == NULL) {
+    return -ENOMEM;
+  }
+
+  /* Create slab cache for speedy allocation of memory for later URB finish
+     struct */
+  later_data_cache =
+    kmem_cache_create("later_data_cache",
+		      sizeof(struct urb_later_data),
+		      0, SLAB_HWCACHE_ALIGN, 0, 0);
+  if(later_data_cache == NULL) {
+    return -ENOMEM;
+  }
+
+
+  /* Initiate the bulk start timer. */
+  init_timer(&bulk_start_timer);
+  bulk_start_timer.expires = jiffies + BULK_START_TIMER_INTERVAL;
+  bulk_start_timer.function = tc_bulk_start_timer_func;
+  add_timer(&bulk_start_timer);
+
+
+  /* Initiate the bulk eot timer. */
+  init_timer(&bulk_eot_timer);
+  bulk_eot_timer.expires = jiffies + BULK_EOT_TIMER_INTERVAL;
+  bulk_eot_timer.function = tc_bulk_eot_timer_func;
+  bulk_eot_timer.data = (unsigned long)hcd;
+  add_timer(&bulk_eot_timer);
+
+  return 0;
+}
+
+/* Uninitialize all resources used by Transfer Controller */
+void tc_destroy(void) {
+
+  /* Destroy all slab cache */
+  kmem_cache_destroy(usb_desc_cache);
+  kmem_cache_destroy(isoc_compl_cache);
+  kmem_cache_destroy(later_data_cache);
+
+  /* Remove timers */
+  del_timer(&bulk_start_timer);
+  del_timer(&bulk_eot_timer);
+}
+
+static void restart_dma8_sub0(void) {
+  unsigned long flags;
+  spin_lock_irqsave(&etrax_dma8_sub0_lock, flags);
+  /* Verify that the dma is not running */
+  if ((*R_DMA_CH8_SUB0_CMD & IO_MASK(R_DMA_CH8_SUB0_CMD, cmd)) == 0) {
+    struct USB_EP_Desc *ep = (struct USB_EP_Desc *)phys_to_virt(*R_DMA_CH8_SUB0_EP);
+    while (DUMMY_EPID == IO_EXTRACT(USB_EP_command, epid, ep->command)) {
+      ep = (struct USB_EP_Desc *)phys_to_virt(ep->next);
+    }
+    /* Advance the DMA to the next EP descriptor that is not a DUMMY_EPID.
+     * ep->next is already a physical address; no need for a virt_to_phys. */
+    *R_DMA_CH8_SUB0_EP = ep->next;
+    /* Restart the DMA */
+    *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start);
+  }
+  spin_unlock_irqrestore(&etrax_dma8_sub0_lock, flags);
+}
+
+/* queue an URB with the transfer controller (called from hcd_driver) */
+static int tc_urb_enqueue(struct usb_hcd *hcd, 
+			  struct usb_host_endpoint *ep,
+			  struct urb *urb, 
+			  gfp_t mem_flags) {
+  int epid;
+  int retval;
+  int bustime = 0;
+  int maxpacket;
+  unsigned long flags;
+  struct crisv10_urb_priv *urb_priv;
+  struct crisv10_hcd* crisv10_hcd = hcd_to_crisv10_hcd(hcd);
+  DBFENTER;
+
+  if(!(crisv10_hcd->running)) {
+    /* The USB Controller is not running, probably because no device is 
+       attached. No idea to enqueue URBs then */
+    tc_warn("Rejected enqueueing of URB:0x%x because no dev attached\n",
+	    (unsigned int)urb);
+    return -ENOENT;
+  }
+
+  maxpacket = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
+  /* Special case check for In Isoc transfers. Specification states that each
+     In Isoc transfer consists of one packet and therefore it should fit into
+     the transfer-buffer of an URB.
+     We do the check here to be sure (an invalid scenario can be produced with
+     parameters to the usbtest suite) */
+  if(usb_pipeisoc(urb->pipe) && usb_pipein(urb->pipe) &&
+     (urb->transfer_buffer_length < maxpacket)) {
+    tc_err("Submit In Isoc URB with buffer length:%d to pipe with maxpacketlen: %d\n", urb->transfer_buffer_length, maxpacket);
+    return -EMSGSIZE;
+  }
+
+  /* Check if there is enough bandwidth for periodic transfer  */
+  if(usb_pipeint(urb->pipe) || usb_pipeisoc(urb->pipe)) {
+    /* only check (and later claim) if not already claimed */
+    if (urb->bandwidth == 0) {
+      bustime = usb_check_bandwidth(urb->dev, urb);
+      if (bustime < 0) {
+	tc_err("Not enough periodic bandwidth\n");
+	return -ENOSPC;
+      }
+    }
+  }
+
+  /* Check if there is a epid for URBs destination, if not this function
+     set up one. */
+  epid = tc_setup_epid(ep, urb, mem_flags);
+  if (epid < 0) {
+    tc_err("Failed setup epid:%d for URB:0x%x\n", epid, (unsigned int)urb);
+    DBFEXIT;
+    return -ENOMEM;
+  }
+
+  if(urb == activeUrbList[epid]) {
+    tc_err("Resubmition of allready active URB:0x%x\n", (unsigned int)urb);
+    return -ENXIO;
+  }
+
+  if(urb_list_entry(urb, epid)) {
+    tc_err("Resubmition of allready queued URB:0x%x\n", (unsigned int)urb);
+    return -ENXIO;
+  }
+
+  /* If we actively have flaged endpoint as disabled then refuse submition */
+  if(epid_state[epid].disabled) {
+    return -ENOENT;
+  }
+
+  /* Allocate and init HC-private data for URB */
+  if(urb_priv_create(hcd, urb, epid, mem_flags) != 0) {
+    DBFEXIT;
+    return -ENOMEM;
+  }
+  urb_priv = urb->hcpriv;
+
+  tc_dbg("Enqueue URB:0x%x[%d] epid:%d (%s) bufflen:%d\n",
+	 (unsigned int)urb, urb_priv->urb_num, epid,
+	 pipe_to_str(urb->pipe), urb->transfer_buffer_length);
+
+  /* Create and link SBs required for this URB */
+  retval = create_sb_for_urb(urb, mem_flags);
+  if(retval != 0) {
+    tc_err("Failed to create SBs for URB:0x%x[%d]\n", (unsigned int)urb,
+	   urb_priv->urb_num);
+    urb_priv_free(hcd, urb);
+    DBFEXIT;
+    return retval;
+  }
+
+  /* Init intr EP pool if this URB is a INTR transfer. This pool is later
+     used when inserting EPs in the TxIntrEPList. We do the alloc here
+     so we can't run out of memory later */
+  if(usb_pipeint(urb->pipe)) {
+    retval = init_intr_urb(urb, mem_flags);
+    if(retval != 0) {
+      tc_warn("Failed to init Intr URB\n");
+      urb_priv_free(hcd, urb);
+      DBFEXIT;
+      return retval;
+    }
+  }
+
+  /* Disable other access when inserting USB */
+  local_irq_save(flags);
+
+  /* Claim bandwidth, if needed */
+  if(bustime) {
+    usb_claim_bandwidth(urb->dev, urb, bustime, 0);
+  }
+  
+  /* Add URB to EP queue */
+  urb_list_add(urb, epid, mem_flags);
+
+  if(usb_pipeisoc(urb->pipe)) {
+    /* Special processing of Isoc URBs. */
+    tc_dma_process_isoc_urb(urb);
+  } else {
+    /* Process EP queue for rest of the URB types (Bulk, Ctrl, Intr) */
+    tc_dma_process_queue(epid);
+  }
+
+  local_irq_restore(flags);
+
+  DBFEXIT;
+  return 0;
+}
+
+/* remove an URB from the transfer controller queues (called from hcd_driver)*/
+static int tc_urb_dequeue(struct usb_hcd *hcd, struct urb *urb) {
+  struct crisv10_urb_priv *urb_priv;
+  unsigned long flags;
+  int epid;
+
+  DBFENTER;
+  /* Disable interrupts here since a descriptor interrupt for the isoc epid
+     will modify the sb list.  This could possibly be done more granular, but
+     urb_dequeue should not be used frequently anyway.
+  */
+  local_irq_save(flags);
+
+  urb_priv = urb->hcpriv;
+
+  if (!urb_priv) {
+    /* This happens if a device driver calls unlink on an urb that
+       was never submitted (lazy driver) or if the urb was completed
+       while dequeue was being called. */
+    tc_warn("Dequeing of not enqueued URB:0x%x\n", (unsigned int)urb);
+    local_irq_restore(flags);
+    return 0;
+  }
+  epid = urb_priv->epid;
+
+  tc_warn("Dequeing %s URB:0x%x[%d] (%s %s epid:%d) status:%d %s\n",
+	  (urb == activeUrbList[epid]) ? "active" : "queued",
+	  (unsigned int)urb, urb_priv->urb_num, str_dir(urb->pipe),
+	  str_type(urb->pipe), epid, urb->status,
+	  (urb_priv->later_data) ? "later-sched" : "");
+
+  /* For Bulk, Ctrl and Intr are only one URB active at a time. So any URB
+     that isn't active can be dequeued by just removing it from the queue */
+  if(usb_pipebulk(urb->pipe) || usb_pipecontrol(urb->pipe) ||
+     usb_pipeint(urb->pipe)) {
+
+    /* Check if URB haven't gone further than the queue */
+    if(urb != activeUrbList[epid]) {
+      ASSERT(urb_priv->later_data == NULL);
+      tc_warn("Dequeing URB:0x%x[%d] (%s %s epid:%d) from queue"
+	      " (not active)\n", (unsigned int)urb, urb_priv->urb_num,
+	      str_dir(urb->pipe), str_type(urb->pipe), epid);
+      
+      /* Finish the URB with error status from USB core */
+      tc_finish_urb(hcd, urb, urb->status);
+      local_irq_restore(flags);
+      return 0;
+    }
+  }
+
+  /* Set URB status to Unlink for handling when interrupt comes. */
+  urb_priv->urb_state = UNLINK;
+
+  /* Differentiate dequeing of Bulk and Ctrl from Isoc and Intr */
+  switch(usb_pipetype(urb->pipe)) {
+  case PIPE_BULK:
+    /* Check if EP still is enabled */
+    if (TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+      /* The EP was enabled, disable it. */
+      TxBulkEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
+    }
+    /* Kicking dummy list out of the party. */
+    TxBulkEPList[epid].next = virt_to_phys(&TxBulkEPList[(epid + 1) % NBR_OF_EPIDS]);
+    break;
+  case PIPE_CONTROL:
+    /* Check if EP still is enabled */
+    if (TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+      /* The EP was enabled, disable it. */
+      TxCtrlEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
+    }
+    break;
+  case PIPE_ISOCHRONOUS:
+    /* Disabling, busy-wait and unlinking of Isoc SBs will be done in
+       finish_isoc_urb(). Because there might the case when URB is dequeued
+       but there are other valid URBs waiting */
+
+    /* Check if In Isoc EP still is enabled */
+    if (TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+      /* The EP was enabled, disable it. */
+      TxIsocEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
+    }
+    break;
+  case PIPE_INTERRUPT:
+    /* Special care is taken for interrupt URBs. EPs are unlinked in
+       tc_finish_urb */
+    break;
+  default:
+    break;
+  }
+
+  /* Asynchronous unlink, finish the URB later from scheduled or other
+     event (data finished, error) */
+  tc_finish_urb_later(hcd, urb, urb->status);
+
+  local_irq_restore(flags);
+  DBFEXIT;
+  return 0;
+}
+
+
+static void tc_sync_finish_epid(struct usb_hcd *hcd, int epid) {
+  volatile int timeout = 10000;
+  struct urb* urb;
+  struct crisv10_urb_priv* urb_priv;
+  unsigned long flags;
+  
+  volatile struct USB_EP_Desc *first_ep;  /* First EP in the list. */
+  volatile struct USB_EP_Desc *curr_ep;   /* Current EP, the iterator. */
+  volatile struct USB_EP_Desc *next_ep;   /* The EP after current. */
+
+  int type = epid_state[epid].type;
+
+  /* Setting this flag will cause enqueue() to return -ENOENT for new
+     submitions on this endpoint and finish_urb() wont process queue further */
+  epid_state[epid].disabled = 1;
+
+  switch(type) {
+  case PIPE_BULK:
+    /* Check if EP still is enabled */
+    if (TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+      /* The EP was enabled, disable it. */
+      TxBulkEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
+      tc_warn("sync_finish: Disabling EP for epid:%d\n", epid);
+
+      /* Do busy-wait until DMA not using this EP descriptor anymore */
+      while((*R_DMA_CH8_SUB0_EP ==
+	     virt_to_phys(&TxBulkEPList[epid])) &&
+	    (timeout-- > 0));
+      if(timeout == 0) {
+	warn("Timeout while waiting for DMA-TX-Bulk to leave EP for"
+	     " epid:%d\n", epid);
+      }
+    }
+    break;
+
+  case PIPE_CONTROL:
+    /* Check if EP still is enabled */
+    if (TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+      /* The EP was enabled, disable it. */
+      TxCtrlEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
+      tc_warn("sync_finish: Disabling EP for epid:%d\n", epid);
+
+      /* Do busy-wait until DMA not using this EP descriptor anymore */
+      while((*R_DMA_CH8_SUB1_EP ==
+	     virt_to_phys(&TxCtrlEPList[epid])) &&
+	    (timeout-- > 0));
+      if(timeout == 0) {
+	warn("Timeout while waiting for DMA-TX-Ctrl to leave EP for"
+	     " epid:%d\n", epid);
+      }
+    }
+    break;
+
+  case PIPE_INTERRUPT:
+    local_irq_save(flags);
+    /* Disable all Intr EPs belonging to epid */
+    first_ep = &TxIntrEPList[0];
+    curr_ep = first_ep;
+    do {
+      next_ep = (struct USB_EP_Desc *)phys_to_virt(curr_ep->next);
+      if (IO_EXTRACT(USB_EP_command, epid, next_ep->command) == epid) {
+	/* Disable EP */
+	next_ep->command &= ~IO_MASK(USB_EP_command, enable);
+      }
+      curr_ep = phys_to_virt(curr_ep->next);
+    } while (curr_ep != first_ep);
+
+    local_irq_restore(flags);
+    break;
+
+  case PIPE_ISOCHRONOUS:
+    /* Check if EP still is enabled */
+    if (TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+      tc_warn("sync_finish: Disabling Isoc EP for epid:%d\n", epid);
+      /* The EP was enabled, disable it. */
+      TxIsocEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
+      
+      while((*R_DMA_CH8_SUB3_EP == virt_to_phys(&TxIsocEPList[epid])) &&
+	    (timeout-- > 0));
+      if(timeout == 0) {
+	warn("Timeout while waiting for DMA-TX-Isoc to leave EP for"
+	     " epid:%d\n", epid);
+      }
+    }
+    break;
+  }
+
+  local_irq_save(flags);
+
+  /* Finish if there is active URB for this endpoint */
+  if(activeUrbList[epid] != NULL) {
+    urb = activeUrbList[epid];
+    urb_priv = urb->hcpriv;
+    ASSERT(urb_priv);
+    tc_warn("Sync finish %s URB:0x%x[%d] (%s %s epid:%d) status:%d %s\n",
+	    (urb == activeUrbList[epid]) ? "active" : "queued",
+	    (unsigned int)urb, urb_priv->urb_num, str_dir(urb->pipe),
+	    str_type(urb->pipe), epid, urb->status,
+	    (urb_priv->later_data) ? "later-sched" : "");
+
+    tc_finish_urb(hcd, activeUrbList[epid], -ENOENT);
+    ASSERT(activeUrbList[epid] == NULL);
+  }
+
+  /* Finish any queued URBs for this endpoint. There won't be any resubmitions
+     because epid_disabled causes enqueue() to fail for this endpoint */
+  while((urb = urb_list_first(epid)) != NULL) {
+    urb_priv = urb->hcpriv;
+    ASSERT(urb_priv);
+
+    tc_warn("Sync finish %s URB:0x%x[%d] (%s %s epid:%d) status:%d %s\n",
+	    (urb == activeUrbList[epid]) ? "active" : "queued",
+	    (unsigned int)urb, urb_priv->urb_num, str_dir(urb->pipe),
+	    str_type(urb->pipe), epid, urb->status,
+	    (urb_priv->later_data) ? "later-sched" : "");
+
+    tc_finish_urb(hcd, urb, -ENOENT);
+  }
+  epid_state[epid].disabled = 0;
+  local_irq_restore(flags);
+}
+
+/* free resources associated with an endpoint (called from hcd_driver) */
+static void tc_endpoint_disable(struct usb_hcd *hcd, 
+				struct usb_host_endpoint *ep) {
+  DBFENTER;
+  /* Only free epid if it has been allocated. We get two endpoint_disable
+     requests for ctrl endpoints so ignore the second one */
+  if(ep->hcpriv != NULL) {
+    struct crisv10_ep_priv *ep_priv = ep->hcpriv;
+    int epid = ep_priv->epid;
+    tc_warn("endpoint_disable ep:0x%x ep-priv:0x%x (%s) (epid:%d freed)\n",
+	   (unsigned int)ep, (unsigned int)ep->hcpriv,
+	   endpoint_to_str(&(ep->desc)), epid);
+
+    tc_sync_finish_epid(hcd, epid);
+
+    ASSERT(activeUrbList[epid] == NULL);
+    ASSERT(list_empty(&urb_list[epid]));
+
+    tc_free_epid(ep);
+  } else {
+    tc_dbg("endpoint_disable ep:0x%x ep-priv:0x%x (%s)\n", (unsigned int)ep,
+	   (unsigned int)ep->hcpriv, endpoint_to_str(&(ep->desc)));
+  }
+  DBFEXIT;
+}
+
+static void tc_finish_urb_later_proc(void *data) {
+  unsigned long flags;
+  struct urb_later_data* uld = (struct urb_later_data*)data;
+  local_irq_save(flags);
+  if(uld->urb == NULL) {
+    late_dbg("Later finish of URB = NULL (allready finished)\n");
+  } else {
+    struct crisv10_urb_priv* urb_priv = uld->urb->hcpriv;
+    ASSERT(urb_priv);
+    if(urb_priv->urb_num == uld->urb_num) {
+      late_dbg("Later finish of URB:0x%x[%d]\n", (unsigned int)(uld->urb),
+	       urb_priv->urb_num);
+      if(uld->status != uld->urb->status) {
+	errno_dbg("Later-finish URB with status:%d, later-status:%d\n",
+		  uld->urb->status, uld->status);
+      }
+      if(uld != urb_priv->later_data) {
+	panic("Scheduled uld not same as URBs uld\n");
+      }
+      tc_finish_urb(uld->hcd, uld->urb, uld->status);
+    } else {
+      late_warn("Ignoring later finish of URB:0x%x[%d]"
+		", urb_num doesn't match current URB:0x%x[%d]",
+		(unsigned int)(uld->urb), uld->urb_num,
+		(unsigned int)(uld->urb), urb_priv->urb_num);
+    }
+  }
+  local_irq_restore(flags);
+  kmem_cache_free(later_data_cache, uld);
+}
+
+static void tc_finish_urb_later(struct usb_hcd *hcd, struct urb *urb,
+				int status) {
+  struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+  struct urb_later_data* uld;
+
+  ASSERT(urb_priv);
+
+  if(urb_priv->later_data != NULL) {
+    /* Later-finish allready scheduled for this URB, just update status to
+       return when finishing later */
+    errno_dbg("Later-finish schedule change URB status:%d with new"
+	      " status:%d\n", urb_priv->later_data->status, status);
+    
+    urb_priv->later_data->status = status;
+    return;
+  }
+
+  uld = kmem_cache_alloc(later_data_cache, SLAB_ATOMIC);
+  ASSERT(uld);
+
+  uld->hcd = hcd;
+  uld->urb = urb;
+  uld->urb_num = urb_priv->urb_num;
+  uld->status = status;
+
+  INIT_WORK(&uld->ws, tc_finish_urb_later_proc, uld);
+  urb_priv->later_data = uld;
+
+  /* Schedule the finishing of the URB to happen later */
+  schedule_delayed_work(&uld->ws, LATER_TIMER_DELAY);
+}
+
+static void tc_finish_isoc_urb(struct usb_hcd *hcd, struct urb *urb,
+			       int status);
+
+static void tc_finish_urb(struct usb_hcd *hcd, struct urb *urb, int status) {
+  struct crisv10_hcd* crisv10_hcd = hcd_to_crisv10_hcd(hcd);
+  struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+  int epid;
+  char toggle;
+  int urb_num;
+
+  DBFENTER;
+  ASSERT(urb_priv != NULL);
+  epid = urb_priv->epid;
+  urb_num = urb_priv->urb_num;
+
+  if(urb != activeUrbList[epid]) {
+    if(urb_list_entry(urb, epid)) {
+      /* Remove this URB from the list. Only happens when URB are finished
+	 before having been processed (dequeing) */
+      urb_list_del(urb, epid);
+    } else {
+      tc_warn("Finishing of URB:0x%x[%d] neither active or in queue for"
+	      " epid:%d\n", (unsigned int)urb, urb_num, epid);
+    }
+  }
+
+  /* Cancel any pending later-finish of this URB */
+  if(urb_priv->later_data) {
+    urb_priv->later_data->urb = NULL;
+  }
+
+  /* For an IN pipe, we always set the actual length, regardless of whether
+     there was an error or not (which means the device driver can use the data
+     if it wants to). */
+  if(usb_pipein(urb->pipe)) {
+    urb->actual_length = urb_priv->rx_offset;
+  } else {
+    /* Set actual_length for OUT urbs also; the USB mass storage driver seems
+       to want that. */
+    if (status == 0 && urb->status == -EINPROGRESS) {
+      urb->actual_length = urb->transfer_buffer_length;
+    } else {
+      /*  We wouldn't know of any partial writes if there was an error. */
+      urb->actual_length = 0;
+    }
+  }
+
+
+  /* URB status mangling */
+  if(urb->status == -EINPROGRESS) {
+    /* The USB core hasn't changed the status, let's set our finish status */
+    urb->status = status;
+
+    if ((status == 0) && (urb->transfer_flags & URB_SHORT_NOT_OK) &&
+	usb_pipein(urb->pipe) &&
+	(urb->actual_length != urb->transfer_buffer_length)) {
+      /* URB_SHORT_NOT_OK means that short reads (shorter than the endpoint's
+	 max length) is to be treated as an error. */
+      errno_dbg("Finishing URB:0x%x[%d] with SHORT_NOT_OK flag and short"
+		" data:%d\n", (unsigned int)urb, urb_num,
+		urb->actual_length);
+      urb->status = -EREMOTEIO;
+    }
+
+    if(urb_priv->urb_state == UNLINK) {
+      /* URB has been requested to be unlinked asynchronously */
+      urb->status = -ECONNRESET;
+      errno_dbg("Fixing unlink status of URB:0x%x[%d] to:%d\n",
+		(unsigned int)urb, urb_num, urb->status);
+    }
+  } else {
+    /* The USB Core wants to signal some error via the URB, pass it through */
+  }
+
+  /* use completely different finish function for Isoc URBs */
+  if(usb_pipeisoc(urb->pipe)) {
+    tc_finish_isoc_urb(hcd, urb, status);
+    return;
+  }
+
+  /* Do special unlinking of EPs for Intr traffic */
+  if(usb_pipeint(urb->pipe)) {
+    tc_dma_unlink_intr_urb(urb);
+  }
+
+  /* Release allocated bandwidth for periodic transfers */
+  if(usb_pipeint(urb->pipe) || usb_pipeisoc(urb->pipe))
+    usb_release_bandwidth(urb->dev, urb, 0);
+
+  /* This URB is active on EP */
+  if(urb == activeUrbList[epid]) {
+    /* We need to fiddle with the toggle bits because the hardware doesn't do
+       it for us. */
+    toggle = etrax_epid_get_toggle(epid, usb_pipeout(urb->pipe));
+    usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
+		  usb_pipeout(urb->pipe), toggle);
+
+    /* Checks for Ctrl and Bulk EPs */
+    switch(usb_pipetype(urb->pipe)) {
+    case PIPE_BULK:
+      /* Check so Bulk EP realy is disabled before finishing active URB  */
+      ASSERT((TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) ==
+	     IO_STATE(USB_EP_command, enable, no));
+      /* Disable sub-pointer for EP to avoid next tx_interrupt() to
+	 process Bulk EP. */
+      TxBulkEPList[epid].sub = 0;
+      /* No need to wait for the DMA before changing the next pointer.
+	 The modulo NBR_OF_EPIDS isn't actually necessary, since we will never use
+	 the last one (INVALID_EPID) for actual traffic. */
+      TxBulkEPList[epid].next = 
+	virt_to_phys(&TxBulkEPList[(epid + 1) % NBR_OF_EPIDS]);
+      break;
+    case PIPE_CONTROL:
+      /* Check so Ctrl EP realy is disabled before finishing active URB  */
+      ASSERT((TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)) ==
+	     IO_STATE(USB_EP_command, enable, no));
+      /* Disable sub-pointer for EP to avoid next tx_interrupt() to
+	 process Ctrl EP. */
+      TxCtrlEPList[epid].sub = 0;
+      break;
+    }
+  }
+
+  /* Free HC-private URB data*/
+  urb_priv_free(hcd, urb);
+
+  if(urb->status) {
+    errno_dbg("finish_urb (URB:0x%x[%d] %s %s) (data:%d) status:%d\n",
+	      (unsigned int)urb, urb_num, str_dir(urb->pipe),
+	      str_type(urb->pipe), urb->actual_length, urb->status);
+  } else {
+    tc_dbg("finish_urb (URB:0x%x[%d] %s %s) (data:%d) status:%d\n",
+	   (unsigned int)urb, urb_num, str_dir(urb->pipe),
+	   str_type(urb->pipe), urb->actual_length, urb->status);
+  }
+
+  /* If we just finished an active URB, clear active pointer. */
+  if (urb == activeUrbList[epid]) {
+    /* Make URB not active on EP anymore */
+    activeUrbList[epid] = NULL;
+
+    if(urb->status == 0) {
+      /* URB finished sucessfully, process queue to see if there are any more
+	 URBs waiting before we call completion function.*/
+      if(crisv10_hcd->running) {
+	/* Only process queue if USB controller is running */
+	tc_dma_process_queue(epid);
+      } else {
+	tc_warn("No processing of queue for epid:%d, USB Controller not"
+		" running\n", epid);
+      }
+    }
+  }
+
+  /*  Hand the URB from HCD to its USB device driver, using its completion
+      functions */
+  usb_hcd_giveback_urb (hcd, urb);
+
+  /* Check the queue once more if the URB returned with error, because we
+     didn't do it before the completion function because the specification
+     states that the queue should not restart until all it's unlinked
+     URBs have been fully retired, with the completion functions run */
+  if(crisv10_hcd->running) {
+    /* Only process queue if USB controller is running */
+    tc_dma_process_queue(epid);
+  } else {
+    tc_warn("No processing of queue for epid:%d, USB Controller not running\n",
+	    epid);
+  }
+
+  DBFEXIT;
+}
+
+static void tc_finish_isoc_urb(struct usb_hcd *hcd, struct urb *urb,
+			       int status) {
+  struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+  int epid, i;
+  volatile int timeout = 10000;
+
+  ASSERT(urb_priv);
+  epid = urb_priv->epid;
+
+  ASSERT(usb_pipeisoc(urb->pipe));
+
+  /* Set that all isoc packets have status and length set before
+     completing the urb. */
+  for (i = urb_priv->isoc_packet_counter; i < urb->number_of_packets; i++){
+    urb->iso_frame_desc[i].actual_length = 0;
+    urb->iso_frame_desc[i].status = -EPROTO;
+  }
+
+  /* Check if the URB is currently active (done or error) */
+  if(urb == activeUrbList[epid]) {
+    /* Check if there are another In Isoc URB queued for this epid */
+    if (!list_empty(&urb_list[epid])&& !epid_state[epid].disabled) {
+      /* Move it from queue to active and mark it started so Isoc transfers
+	 won't be interrupted.
+	 All Isoc URBs data transfers are already added to DMA lists so we
+	 don't have to insert anything in DMA lists here. */
+      activeUrbList[epid] = urb_list_first(epid);
+      ((struct crisv10_urb_priv *)(activeUrbList[epid]->hcpriv))->urb_state =
+	STARTED;
+      urb_list_del(activeUrbList[epid], epid);
+
+      if(urb->status) {
+	errno_dbg("finish_isoc_urb (URB:0x%x[%d] %s %s) (%d of %d packets)"
+		  " status:%d, new waiting URB:0x%x[%d]\n",
+		  (unsigned int)urb, urb_priv->urb_num, str_dir(urb->pipe),
+		  str_type(urb->pipe), urb_priv->isoc_packet_counter,
+		  urb->number_of_packets, urb->status,
+		  (unsigned int)activeUrbList[epid],
+		  ((struct crisv10_urb_priv *)(activeUrbList[epid]->hcpriv))->urb_num);
+      }
+
+    } else { /* No other URB queued for this epid */
+      if(urb->status) {
+	errno_dbg("finish_isoc_urb (URB:0x%x[%d] %s %s) (%d of %d packets)"
+		  " status:%d, no new URB waiting\n",
+		  (unsigned int)urb, urb_priv->urb_num, str_dir(urb->pipe),
+		  str_type(urb->pipe), urb_priv->isoc_packet_counter,
+		  urb->number_of_packets, urb->status);
+      }
+
+      /* Check if EP is still enabled, then shut it down. */
+      if (TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+	isoc_dbg("Isoc EP enabled for epid:%d, disabling it\n", epid);
+
+	/* Should only occur for In Isoc EPs where SB isn't consumed. */
+	ASSERT(usb_pipein(urb->pipe));
+
+	/* Disable it and wait for it to stop */
+	TxIsocEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
+	
+	/* Ah, the luxury of busy-wait. */
+	while((*R_DMA_CH8_SUB3_EP == virt_to_phys(&TxIsocEPList[epid])) &&
+	      (timeout-- > 0));
+	if(timeout == 0) {
+	  warn("Timeout while waiting for DMA-TX-Isoc to leave EP for epid:%d\n", epid);
+	}
+      }
+
+      /* Unlink SB to say that epid is finished. */
+      TxIsocEPList[epid].sub = 0;
+      TxIsocEPList[epid].hw_len = 0;
+
+      /* No URB active for EP anymore */
+      activeUrbList[epid] = NULL;
+    }
+  } else { /* Finishing of not active URB (queued up with SBs thought) */
+    isoc_warn("finish_isoc_urb (URB:0x%x %s) (%d of %d packets) status:%d,"
+	      " SB queued but not active\n",
+	      (unsigned int)urb, str_dir(urb->pipe),
+	      urb_priv->isoc_packet_counter, urb->number_of_packets,
+	      urb->status);
+    if(usb_pipeout(urb->pipe)) {
+      /* Finishing of not yet active Out Isoc URB needs unlinking of SBs. */
+      struct USB_SB_Desc *iter_sb, *prev_sb, *next_sb;
+
+      iter_sb = TxIsocEPList[epid].sub ?
+	phys_to_virt(TxIsocEPList[epid].sub) : 0;
+      prev_sb = 0;
+
+      /* SB that is linked before this URBs first SB */
+      while (iter_sb && (iter_sb != urb_priv->first_sb)) {
+	prev_sb = iter_sb;
+	iter_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0;
+      }
+
+      if (iter_sb == 0) {
+	/* Unlink of the URB currently being transmitted. */
+	prev_sb = 0;
+	iter_sb = TxIsocEPList[epid].sub ? phys_to_virt(TxIsocEPList[epid].sub) : 0;
+      }
+
+      while (iter_sb && (iter_sb != urb_priv->last_sb)) {
+	iter_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0;
+      }
+
+      if (iter_sb) {
+	next_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0;
+      } else {
+	/* This should only happen if the DMA has completed
+	   processing the SB list for this EP while interrupts
+	   are disabled. */
+	isoc_dbg("Isoc urb not found, already sent?\n");
+	next_sb = 0;
+      }
+      if (prev_sb) {
+	prev_sb->next = next_sb ? virt_to_phys(next_sb) : 0;
+      } else {
+	TxIsocEPList[epid].sub = next_sb ? virt_to_phys(next_sb) : 0;
+      }
+    }
+  }
+
+  /* Free HC-private URB data*/
+  urb_priv_free(hcd, urb);
+
+  usb_release_bandwidth(urb->dev, urb, 0);
+
+  /*  Hand the URB from HCD to its USB device driver, using its completion
+      functions */
+  usb_hcd_giveback_urb (hcd, urb);
+}
+
+static __u32 urb_num = 0;
+
+/* allocate and initialize URB private data */
+static int urb_priv_create(struct usb_hcd *hcd, struct urb *urb, int epid,
+			   int mem_flags) {
+  struct crisv10_urb_priv *urb_priv;
+  
+  urb_priv = kmalloc(sizeof *urb_priv, mem_flags);
+  if (!urb_priv)
+    return -ENOMEM;
+  memset(urb_priv, 0, sizeof *urb_priv);
+
+  urb_priv->epid = epid;
+  urb_priv->urb_state = NOT_STARTED;
+
+  urb->hcpriv = urb_priv;
+  /* Assign URB a sequence number, and increment counter */
+  urb_priv->urb_num = urb_num;
+  urb_num++;
+  return 0;
+}
+
+/* free URB private data */
+static void urb_priv_free(struct usb_hcd *hcd, struct urb *urb) {
+  int i;
+  struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+  ASSERT(urb_priv != 0);
+
+  /* Check it has any SBs linked that needs to be freed*/
+  if(urb_priv->first_sb != NULL) {
+    struct USB_SB_Desc *next_sb, *first_sb, *last_sb;
+    int i = 0;
+    first_sb = urb_priv->first_sb;
+    last_sb = urb_priv->last_sb;
+    ASSERT(last_sb);
+    while(first_sb != last_sb) {
+      next_sb = (struct USB_SB_Desc *)phys_to_virt(first_sb->next);
+      kmem_cache_free(usb_desc_cache, first_sb);
+      first_sb = next_sb;
+      i++;
+    }
+    kmem_cache_free(usb_desc_cache, last_sb);
+    i++;
+  }
+
+  /* Check if it has any EPs in its Intr pool that also needs to be freed */
+  if(urb_priv->intr_ep_pool_length > 0) {
+    for(i = 0; i < urb_priv->intr_ep_pool_length; i++) {
+      kfree(urb_priv->intr_ep_pool[i]);
+    }
+    /*
+    tc_dbg("Freed %d EPs from URB:0x%x EP pool\n",
+	     urb_priv->intr_ep_pool_length, (unsigned int)urb);
+    */
+  }
+
+  kfree(urb_priv);
+  urb->hcpriv = NULL;
+}
+
+static int ep_priv_create(struct usb_host_endpoint *ep, int mem_flags) {
+  struct crisv10_ep_priv *ep_priv;
+  
+  ep_priv = kmalloc(sizeof *ep_priv, mem_flags);
+  if (!ep_priv)
+    return -ENOMEM;
+  memset(ep_priv, 0, sizeof *ep_priv);
+
+  ep->hcpriv = ep_priv;
+  return 0;
+}
+
+static void ep_priv_free(struct usb_host_endpoint *ep) {
+  struct crisv10_ep_priv *ep_priv = ep->hcpriv;
+  ASSERT(ep_priv);
+  kfree(ep_priv);
+  ep->hcpriv = NULL;
+}
+
+/* EPID handling functions, managing EP-list in Etrax through wrappers */
+/* ------------------------------------------------------------------- */
+
+/* Sets up a new EPID for an endpoint or returns existing if found */
+static int tc_setup_epid(struct usb_host_endpoint *ep, struct urb *urb,
+			 int mem_flags) {
+  int epid;
+  char devnum, endpoint, out_traffic, slow;
+  int maxlen;
+  __u32 epid_data;
+  struct crisv10_ep_priv *ep_priv = ep->hcpriv;
+  
+  DBFENTER;
+  
+  /* Check if a valid epid already is setup for this endpoint */
+  if(ep_priv != NULL) {
+    return ep_priv->epid;
+  }
+
+  /* We must find and initiate a new epid for this urb. */
+  epid = tc_allocate_epid();
+  
+  if (epid == -1) {
+    /* Failed to allocate a new epid. */
+    DBFEXIT;
+    return epid;
+  }
+  
+  /* We now have a new epid to use. Claim it. */
+  epid_state[epid].inuse = 1;
+  
+  /* Init private data for new endpoint */
+  if(ep_priv_create(ep, mem_flags) != 0) {
+    return -ENOMEM;
+  }
+  ep_priv = ep->hcpriv;
+  ep_priv->epid = epid;
+
+  devnum = usb_pipedevice(urb->pipe);
+  endpoint = usb_pipeendpoint(urb->pipe);
+  slow = (urb->dev->speed == USB_SPEED_LOW);
+  maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
+
+  if (usb_pipetype(urb->pipe) == PIPE_CONTROL) {
+    /* We want both IN and OUT control traffic to be put on the same
+       EP/SB list. */
+    out_traffic = 1;
+  } else {
+    out_traffic = usb_pipeout(urb->pipe);
+  }
+    
+  if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
+    epid_data = IO_STATE(R_USB_EPT_DATA_ISO, valid, yes) |
+      /* FIXME: Change any to the actual port? */
+      IO_STATE(R_USB_EPT_DATA_ISO, port, any) |
+      IO_FIELD(R_USB_EPT_DATA_ISO, max_len, maxlen) |
+      IO_FIELD(R_USB_EPT_DATA_ISO, ep, endpoint) |
+      IO_FIELD(R_USB_EPT_DATA_ISO, dev, devnum);
+    etrax_epid_iso_set(epid, epid_data);
+  } else {
+    epid_data = IO_STATE(R_USB_EPT_DATA, valid, yes) |
+      IO_FIELD(R_USB_EPT_DATA, low_speed, slow) |
+      /* FIXME: Change any to the actual port? */
+      IO_STATE(R_USB_EPT_DATA, port, any) |
+      IO_FIELD(R_USB_EPT_DATA, max_len, maxlen) |
+      IO_FIELD(R_USB_EPT_DATA, ep, endpoint) |
+      IO_FIELD(R_USB_EPT_DATA, dev, devnum);
+    etrax_epid_set(epid, epid_data);
+  }
+  
+  epid_state[epid].out_traffic = out_traffic;
+  epid_state[epid].type = usb_pipetype(urb->pipe);
+
+  tc_warn("Setting up ep:0x%x epid:%d (addr:%d endp:%d max_len:%d %s %s %s)\n",
+	  (unsigned int)ep, epid, devnum, endpoint, maxlen,
+	  str_type(urb->pipe), out_traffic ? "out" : "in",
+	  slow ? "low" : "full");
+
+  /* Enable Isoc eof interrupt if we set up the first Isoc epid */
+  if(usb_pipeisoc(urb->pipe)) {
+    isoc_epid_counter++;
+    if(isoc_epid_counter == 1) {
+      isoc_warn("Enabled Isoc eof interrupt\n");
+      *R_USB_IRQ_MASK_SET |= IO_STATE(R_USB_IRQ_MASK_SET, iso_eof, set);
+    }
+  }
+
+  DBFEXIT;
+  return epid;
+}
+
+static void tc_free_epid(struct usb_host_endpoint *ep) {
+  unsigned long flags;
+  struct crisv10_ep_priv *ep_priv = ep->hcpriv;
+  int epid;
+  volatile int timeout = 10000;
+
+  DBFENTER;
+
+  if (ep_priv == NULL) {
+    tc_warn("Trying to free unused epid on ep:0x%x\n", (unsigned int)ep);
+    DBFEXIT;
+    return;
+  }
+
+  epid = ep_priv->epid;
+
+  /* Disable Isoc eof interrupt if we free the last Isoc epid */
+  if(epid_isoc(epid)) {
+    ASSERT(isoc_epid_counter > 0);
+    isoc_epid_counter--;
+    if(isoc_epid_counter == 0) {
+      *R_USB_IRQ_MASK_SET &= ~IO_STATE(R_USB_IRQ_MASK_SET, iso_eof, set);
+      isoc_warn("Disabled Isoc eof interrupt\n");
+    }
+  }
+
+  /* Take lock manualy instead of in epid_x_x wrappers,
+     because we need to be polling here */
+  spin_lock_irqsave(&etrax_epid_lock, flags);
+  
+  *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
+  nop();
+  while((*R_USB_EPT_DATA & IO_MASK(R_USB_EPT_DATA, hold)) &&
+	(timeout-- > 0));
+  if(timeout == 0) {
+    warn("Timeout while waiting for epid:%d to drop hold\n", epid);
+  }
+  /* This will, among other things, set the valid field to 0. */
+  *R_USB_EPT_DATA = 0;
+  spin_unlock_irqrestore(&etrax_epid_lock, flags);
+  
+  /* Free resource in software state info list */
+  epid_state[epid].inuse = 0;
+
+  /* Free private endpoint data */
+  ep_priv_free(ep);
+  
+  DBFEXIT;
+}
+
+static int tc_allocate_epid(void) {
+  int i;
+  DBFENTER;
+  for (i = 0; i < NBR_OF_EPIDS; i++) {
+    if (!epid_inuse(i)) {
+      DBFEXIT;
+      return i;
+    }
+  }
+  
+  tc_warn("Found no free epids\n");
+  DBFEXIT;
+  return -1;
 }
 
 
-static void init_tx_intr_ep(void)
-{
-	int i;
+/* Wrappers around the list functions (include/linux/list.h). */
+/* ---------------------------------------------------------- */
+static inline int __urb_list_empty(int epid) {
+  int retval;
+  retval = list_empty(&urb_list[epid]);
+  return retval;
+}
 
-	DBFENTER;
+/* Returns first urb for this epid, or NULL if list is empty. */
+static inline struct urb *urb_list_first(int epid) {
+  unsigned long flags;
+  struct urb *first_urb = 0;
+  spin_lock_irqsave(&urb_list_lock, flags);
+  if (!__urb_list_empty(epid)) {
+    /* Get the first urb (i.e. head->next). */
+    urb_entry_t *urb_entry = list_entry((&urb_list[epid])->next, urb_entry_t, list);
+    first_urb = urb_entry->urb;
+  }
+  spin_unlock_irqrestore(&urb_list_lock, flags);
+  return first_urb;
+}
 
-	/* Read comment at zout_buffer declaration for an explanation to this. */
-	TxIntrSB_zout.sw_len = 1;
-	TxIntrSB_zout.next = 0;
-	TxIntrSB_zout.buf = virt_to_phys(&zout_buffer[0]);
-	TxIntrSB_zout.command = (IO_FIELD(USB_SB_command, rem, 0) |
-				 IO_STATE(USB_SB_command, tt, zout) |
-				 IO_STATE(USB_SB_command, full, yes) |
-				 IO_STATE(USB_SB_command, eot, yes) |
-				 IO_STATE(USB_SB_command, eol, yes));
-
-	for (i = 0; i < (MAX_INTR_INTERVAL - 1); i++) {
-		CHECK_ALIGN(&TxIntrEPList[i]);
-		TxIntrEPList[i].hw_len = 0;
-		TxIntrEPList[i].command =
-			(IO_STATE(USB_EP_command, eof, yes) |
-			 IO_STATE(USB_EP_command, enable, yes) |
-			 IO_FIELD(USB_EP_command, epid, INVALID_EPID));
-		TxIntrEPList[i].sub = virt_to_phys(&TxIntrSB_zout);
-		TxIntrEPList[i].next = virt_to_phys(&TxIntrEPList[i + 1]);
-	}
+/* Adds an urb_entry last in the list for this epid. */
+static inline void urb_list_add(struct urb *urb, int epid, int mem_flags) {
+  unsigned long flags;
+  urb_entry_t *urb_entry = (urb_entry_t *)kmalloc(sizeof(urb_entry_t), mem_flags);
+  ASSERT(urb_entry);
+  
+  urb_entry->urb = urb;
+  spin_lock_irqsave(&urb_list_lock, flags);
+  list_add_tail(&urb_entry->list, &urb_list[epid]);
+  spin_unlock_irqrestore(&urb_list_lock, flags);
+}
 
-	CHECK_ALIGN(&TxIntrEPList[i]);
-	TxIntrEPList[i].hw_len = 0;
-	TxIntrEPList[i].command =
-		(IO_STATE(USB_EP_command, eof, yes) |
-		 IO_STATE(USB_EP_command, eol, yes) |
-		 IO_STATE(USB_EP_command, enable, yes) |
-		 IO_FIELD(USB_EP_command, epid, INVALID_EPID));
-	TxIntrEPList[i].sub = virt_to_phys(&TxIntrSB_zout);
-	TxIntrEPList[i].next = virt_to_phys(&TxIntrEPList[0]);
-
-	*R_DMA_CH8_SUB2_EP = virt_to_phys(&TxIntrEPList[0]);
-	*R_DMA_CH8_SUB2_CMD = IO_STATE(R_DMA_CH8_SUB2_CMD, cmd, start);
-	DBFEXIT;
+/* Search through the list for an element that contains this urb. (The list
+   is expected to be short and the one we are about to delete will often be
+   the first in the list.)
+   Should be protected by spin_locks in calling function */
+static inline urb_entry_t *__urb_list_entry(struct urb *urb, int epid) {
+  struct list_head *entry;
+  struct list_head *tmp;
+  urb_entry_t *urb_entry;
+  
+  list_for_each_safe(entry, tmp, &urb_list[epid]) {
+    urb_entry = list_entry(entry, urb_entry_t, list);
+    ASSERT(urb_entry);
+    ASSERT(urb_entry->urb);
+    
+    if (urb_entry->urb == urb) {
+      return urb_entry;
+    }
+  }
+  return 0;
+}
+
+/* Same function as above but for global use. Protects list by spinlock */
+static inline urb_entry_t *urb_list_entry(struct urb *urb, int epid) {
+  unsigned long flags;
+  urb_entry_t *urb_entry;
+  spin_lock_irqsave(&urb_list_lock, flags);
+  urb_entry = __urb_list_entry(urb, epid);
+  spin_unlock_irqrestore(&urb_list_lock, flags);
+  return (urb_entry);
 }
 
-static void init_tx_isoc_ep(void)
-{
-	int i;
+/* Delete an urb from the list. */
+static inline void urb_list_del(struct urb *urb, int epid) {
+  unsigned long flags;
+  urb_entry_t *urb_entry;
+
+  /* Delete entry and free. */
+  spin_lock_irqsave(&urb_list_lock, flags);
+  urb_entry = __urb_list_entry(urb, epid);
+  ASSERT(urb_entry);
+
+  list_del(&urb_entry->list);
+  spin_unlock_irqrestore(&urb_list_lock, flags);
+  kfree(urb_entry);
+}
 
-	DBFENTER;
+/* Move an urb to the end of the list. */
+static inline void urb_list_move_last(struct urb *urb, int epid) {
+  unsigned long flags;
+  urb_entry_t *urb_entry;
+  
+  spin_lock_irqsave(&urb_list_lock, flags);
+  urb_entry = __urb_list_entry(urb, epid);
+  ASSERT(urb_entry);
+
+  list_del(&urb_entry->list);
+  list_add_tail(&urb_entry->list, &urb_list[epid]);
+  spin_unlock_irqrestore(&urb_list_lock, flags);
+}
 
-	/* Read comment at zout_buffer declaration for an explanation to this. */
-	TxIsocSB_zout.sw_len = 1;
-	TxIsocSB_zout.next = 0;
-	TxIsocSB_zout.buf = virt_to_phys(&zout_buffer[0]);
-	TxIsocSB_zout.command = (IO_FIELD(USB_SB_command, rem, 0) |
-				 IO_STATE(USB_SB_command, tt, zout) |
-				 IO_STATE(USB_SB_command, full, yes) |
-				 IO_STATE(USB_SB_command, eot, yes) |
-				 IO_STATE(USB_SB_command, eol, yes));
-
-	/* The last isochronous EP descriptor is a dummy. */
-
-	for (i = 0; i < (NBR_OF_EPIDS - 1); i++) {
-		CHECK_ALIGN(&TxIsocEPList[i]);
-		TxIsocEPList[i].hw_len = 0;
-		TxIsocEPList[i].command = IO_FIELD(USB_EP_command, epid, i);
-		TxIsocEPList[i].sub = 0;
-		TxIsocEPList[i].next = virt_to_phys(&TxIsocEPList[i + 1]);
+/* Get the next urb in the list. */
+static inline struct urb *urb_list_next(struct urb *urb, int epid) {
+  unsigned long flags;
+  urb_entry_t *urb_entry;
+
+  spin_lock_irqsave(&urb_list_lock, flags);
+  urb_entry = __urb_list_entry(urb, epid);
+  ASSERT(urb_entry);
+
+  if (urb_entry->list.next != &urb_list[epid]) {
+    struct list_head *elem = urb_entry->list.next;
+    urb_entry = list_entry(elem, urb_entry_t, list);
+    spin_unlock_irqrestore(&urb_list_lock, flags);
+    return urb_entry->urb;
+  } else {
+    spin_unlock_irqrestore(&urb_list_lock, flags);
+    return NULL;
+  }
+}
+
+struct USB_EP_Desc* create_ep(int epid, struct USB_SB_Desc* sb_desc,
+			      int mem_flags) {
+  struct USB_EP_Desc *ep_desc;
+  ep_desc = (struct USB_EP_Desc *) kmem_cache_alloc(usb_desc_cache, mem_flags);
+  if(ep_desc == NULL)
+    return NULL;
+  memset(ep_desc, 0, sizeof(struct USB_EP_Desc));
+
+  ep_desc->hw_len = 0;
+  ep_desc->command = (IO_FIELD(USB_EP_command, epid, epid) |
+		      IO_STATE(USB_EP_command, enable, yes));
+  if(sb_desc == NULL) {
+    ep_desc->sub = 0;
+  } else {
+    ep_desc->sub = virt_to_phys(sb_desc);
+  }
+  return ep_desc;
+}
+
+#define TT_ZOUT  0
+#define TT_IN    1
+#define TT_OUT   2
+#define TT_SETUP 3
+
+#define CMD_EOL  IO_STATE(USB_SB_command, eol, yes)
+#define CMD_INTR IO_STATE(USB_SB_command, intr, yes)
+#define CMD_FULL IO_STATE(USB_SB_command, full, yes)
+
+/* Allocation and setup of a generic SB. Used to create SETUP, OUT and ZOUT
+   SBs. Also used by create_sb_in() to avoid same allocation procedure at two
+   places */
+struct USB_SB_Desc* create_sb(struct USB_SB_Desc* sb_prev, int tt, void* data,
+			      int datalen, int mem_flags) {
+  struct USB_SB_Desc *sb_desc;
+  sb_desc = (struct USB_SB_Desc*)kmem_cache_alloc(usb_desc_cache, mem_flags);
+  if(sb_desc == NULL)
+    return NULL;
+  memset(sb_desc, 0, sizeof(struct USB_SB_Desc));
+
+  sb_desc->command = IO_FIELD(USB_SB_command, tt, tt) |
+                     IO_STATE(USB_SB_command, eot, yes);
+
+  sb_desc->sw_len = datalen;
+  if(data != NULL) {
+    sb_desc->buf = virt_to_phys(data);
+  } else {
+    sb_desc->buf = 0;
+  }
+  if(sb_prev != NULL) {
+    sb_prev->next = virt_to_phys(sb_desc);
+  }
+  return sb_desc;
+}
+
+/* Creates a copy of an existing SB by allocation space for it and copy
+   settings */
+struct USB_SB_Desc* create_sb_copy(struct USB_SB_Desc* sb_orig, int mem_flags) {
+  struct USB_SB_Desc *sb_desc;
+  sb_desc = (struct USB_SB_Desc*)kmem_cache_alloc(usb_desc_cache, mem_flags);
+  if(sb_desc == NULL)
+    return NULL;
+
+  memcpy(sb_desc, sb_orig, sizeof(struct USB_SB_Desc));
+  return sb_desc;
+}
+
+/* A specific create_sb function for creation of in SBs. This is due to
+   that datalen in In SBs shows how many packets we are expecting. It also
+   sets up the rem field to show if how many bytes we expect in last packet
+   if it's not a full one */
+struct USB_SB_Desc* create_sb_in(struct USB_SB_Desc* sb_prev, int datalen,
+				 int maxlen, int mem_flags) {
+  struct USB_SB_Desc *sb_desc;
+  sb_desc = create_sb(sb_prev, TT_IN, NULL,
+		      datalen ? (datalen - 1) / maxlen + 1 : 0, mem_flags);
+  if(sb_desc == NULL)
+    return NULL;
+  sb_desc->command |= IO_FIELD(USB_SB_command, rem, datalen % maxlen);
+  return sb_desc;
+}
+
+void set_sb_cmds(struct USB_SB_Desc *sb_desc, __u16 flags) {
+  sb_desc->command |= flags;
+}
+
+int create_sb_for_urb(struct urb *urb, int mem_flags) {
+  int is_out = !usb_pipein(urb->pipe);
+  int type = usb_pipetype(urb->pipe);
+  int maxlen = usb_maxpacket(urb->dev, urb->pipe, is_out);
+  int buf_len = urb->transfer_buffer_length;
+  void *buf = buf_len > 0 ? urb->transfer_buffer : NULL;
+  struct USB_SB_Desc *sb_desc = NULL;
+
+  struct crisv10_urb_priv *urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+  ASSERT(urb_priv != NULL);
+
+  switch(type) {
+  case PIPE_CONTROL:
+    /* Setup stage */
+    sb_desc = create_sb(NULL, TT_SETUP, urb->setup_packet, 8, mem_flags);
+    if(sb_desc == NULL)
+      return -ENOMEM;
+    set_sb_cmds(sb_desc, CMD_FULL);
+
+    /* Attach first SB to URB */
+    urb_priv->first_sb = sb_desc;    
+
+    if (is_out) { /* Out Control URB */
+      /* If this Control OUT transfer has an optional data stage we add
+	 an OUT token before the mandatory IN (status) token */
+      if ((buf_len > 0) && buf) {
+	sb_desc = create_sb(sb_desc, TT_OUT, buf, buf_len, mem_flags);
+	if(sb_desc == NULL)
+	  return -ENOMEM;
+	set_sb_cmds(sb_desc, CMD_FULL);
+      }
+
+      /* Status stage */
+      /* The data length has to be exactly 1. This is due to a requirement
+         of the USB specification that a host must be prepared to receive
+         data in the status phase */
+      sb_desc = create_sb(sb_desc, TT_IN, NULL, 1, mem_flags);
+      if(sb_desc == NULL)
+	return -ENOMEM;
+    } else { /* In control URB */
+      /* Data stage */
+      sb_desc = create_sb_in(sb_desc, buf_len, maxlen, mem_flags);
+      if(sb_desc == NULL)
+	return -ENOMEM;
+
+      /* Status stage */
+      /* Read comment at zout_buffer declaration for an explanation to this. */
+      sb_desc = create_sb(sb_desc, TT_ZOUT, &zout_buffer[0], 1, mem_flags);
+      if(sb_desc == NULL)
+	return -ENOMEM;
+      /* Set descriptor interrupt flag for in URBs so we can finish URB after
+         zout-packet has been sent */
+      set_sb_cmds(sb_desc, CMD_INTR | CMD_FULL);
+    }
+    /* Set end-of-list flag in last SB */
+    set_sb_cmds(sb_desc, CMD_EOL);
+    /* Attach last SB to URB */
+    urb_priv->last_sb = sb_desc;
+    break;
+
+  case PIPE_BULK:
+    if (is_out) { /* Out Bulk URB */
+      sb_desc = create_sb(NULL, TT_OUT, buf, buf_len, mem_flags);
+      if(sb_desc == NULL)
+	return -ENOMEM;
+      /* The full field is set to yes, even if we don't actually check that
+	 this is a full-length transfer (i.e., that transfer_buffer_length %
+	 maxlen = 0).
+	 Setting full prevents the USB controller from sending an empty packet
+	 in that case.  However, if URB_ZERO_PACKET was set we want that. */
+      if (!(urb->transfer_flags & URB_ZERO_PACKET)) {
+	set_sb_cmds(sb_desc, CMD_FULL);
+      }
+    } else { /* In Bulk URB */
+      sb_desc = create_sb_in(NULL, buf_len, maxlen, mem_flags);
+      if(sb_desc == NULL)
+	return -ENOMEM;
+    }
+    /* Set end-of-list flag for last SB */
+    set_sb_cmds(sb_desc, CMD_EOL);
+
+    /* Attach SB to URB */
+    urb_priv->first_sb = sb_desc;
+    urb_priv->last_sb = sb_desc;
+    break;
+
+  case PIPE_INTERRUPT:
+    if(is_out) { /* Out Intr URB */
+      sb_desc = create_sb(NULL, TT_OUT, buf, buf_len, mem_flags);
+      if(sb_desc == NULL)
+	return -ENOMEM;
+
+      /* The full field is set to yes, even if we don't actually check that
+	 this is a full-length transfer (i.e., that transfer_buffer_length %
+	 maxlen = 0).
+	 Setting full prevents the USB controller from sending an empty packet
+	 in that case.  However, if URB_ZERO_PACKET was set we want that. */
+      if (!(urb->transfer_flags & URB_ZERO_PACKET)) {
+	set_sb_cmds(sb_desc, CMD_FULL);
+      }
+      /* Only generate TX interrupt if it's a Out URB*/
+      set_sb_cmds(sb_desc, CMD_INTR);
+
+    } else { /* In Intr URB */
+      sb_desc = create_sb_in(NULL, buf_len, maxlen, mem_flags);
+      if(sb_desc == NULL)
+	return -ENOMEM;
+    }
+    /* Set end-of-list flag for last SB */
+    set_sb_cmds(sb_desc, CMD_EOL);
+
+    /* Attach SB to URB */
+    urb_priv->first_sb = sb_desc;
+    urb_priv->last_sb = sb_desc;
+
+    break;
+  case PIPE_ISOCHRONOUS:
+    if(is_out) { /* Out Isoc URB */
+      int i;
+      if(urb->number_of_packets == 0) {
+	tc_err("Can't create SBs for Isoc URB with zero packets\n");
+	return -EPIPE;
+      }
+      /* Create one SB descriptor for each packet and link them together. */
+      for(i = 0; i < urb->number_of_packets; i++) {
+	if (urb->iso_frame_desc[i].length > 0) {
+
+	  sb_desc = create_sb(sb_desc, TT_OUT, urb->transfer_buffer +
+			      urb->iso_frame_desc[i].offset,
+			      urb->iso_frame_desc[i].length, mem_flags);
+	  if(sb_desc == NULL)
+	    return -ENOMEM;
+
+	  /* Check if it's a full length packet */
+	  if (urb->iso_frame_desc[i].length ==
+	      usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe))) {
+	    set_sb_cmds(sb_desc, CMD_FULL);
+	  }
+	  
+	} else { /* zero length packet */
+	  sb_desc = create_sb(sb_desc, TT_ZOUT, &zout_buffer[0], 1, mem_flags);
+	  if(sb_desc == NULL)
+	    return -ENOMEM;
+	  set_sb_cmds(sb_desc, CMD_FULL);
+	}
+	/* Attach first SB descriptor to URB */
+	if (i == 0) {
+	  urb_priv->first_sb = sb_desc;
+	}
+      }
+      /* Set interrupt and end-of-list flags in last SB */
+      set_sb_cmds(sb_desc, CMD_INTR | CMD_EOL);
+      /* Attach last SB descriptor to URB */
+      urb_priv->last_sb = sb_desc;
+      tc_dbg("Created %d out SBs for Isoc URB:0x%x\n",
+	       urb->number_of_packets, (unsigned int)urb);
+    } else { /* In Isoc URB */
+      /* Actual number of packets is not relevant for periodic in traffic as
+	 long as it is more than zero.  Set to 1 always. */
+      sb_desc = create_sb(sb_desc, TT_IN, NULL, 1, mem_flags);
+      if(sb_desc == NULL)
+	return -ENOMEM;
+      /* Set end-of-list flags for SB */
+      set_sb_cmds(sb_desc, CMD_EOL);
+
+      /* Attach SB to URB */
+      urb_priv->first_sb = sb_desc;
+      urb_priv->last_sb = sb_desc;
+    }
+    break;
+  default:
+    tc_err("Unknown pipe-type\n");
+    return -EPIPE;
+    break;
+  }
+  return 0;
+}
+
+int init_intr_urb(struct urb *urb, int mem_flags) {
+  struct crisv10_urb_priv *urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+  struct USB_EP_Desc* ep_desc;
+  int interval;
+  int i;
+  int ep_count;
+
+  ASSERT(urb_priv != NULL);
+  ASSERT(usb_pipeint(urb->pipe));
+  /* We can't support interval longer than amount of eof descriptors in
+     TxIntrEPList */
+  if(urb->interval > MAX_INTR_INTERVAL) {
+    tc_err("Interrupt interval %dms too big (max: %dms)\n", urb->interval,
+	   MAX_INTR_INTERVAL);
+    return -EINVAL;
+  }
+
+  /* We assume that the SB descriptors already have been setup */
+  ASSERT(urb_priv->first_sb != NULL);
+
+  /* Round of the interval to 2^n, it is obvious that this code favours
+     smaller numbers, but that is actually a good thing */
+  /* FIXME: The "rounding error" for larger intervals will be quite
+     large. For in traffic this shouldn't be a problem since it will only
+     mean that we "poll" more often. */
+  interval = urb->interval;
+  for (i = 0; interval; i++) {
+    interval = interval >> 1;
+  }
+  urb_priv->interval = 1 << (i - 1);
+
+  /* We can only have max interval for Out Interrupt due to that we can only
+     handle one linked in EP for a certain epid in the Intr descr array at the
+     time. The USB Controller in the Etrax 100LX continues to process Intr EPs
+     so we have no way of knowing which one that caused the actual transfer if
+     we have several linked in. */
+  if(usb_pipeout(urb->pipe)) {
+    urb_priv->interval = MAX_INTR_INTERVAL;
+  }
+
+  /* Calculate amount of EPs needed */
+  ep_count = MAX_INTR_INTERVAL / urb_priv->interval;
+
+  for(i = 0; i < ep_count; i++) {
+    ep_desc = create_ep(urb_priv->epid, urb_priv->first_sb, mem_flags);
+    if(ep_desc == NULL) {
+      /* Free any descriptors that we may have allocated before failure */
+      while(i > 0) {
+	i--;
+	kfree(urb_priv->intr_ep_pool[i]);
+      }
+      return -ENOMEM;
+    }
+    urb_priv->intr_ep_pool[i] = ep_desc;
+  }
+  urb_priv->intr_ep_pool_length = ep_count;
+  return 0;
+}
+
+/* DMA RX/TX functions */
+/* ----------------------- */
+
+static void tc_dma_init_rx_list(void) {
+  int i;
+
+  /* Setup descriptor list except last one */
+  for (i = 0; i < (NBR_OF_RX_DESC - 1); i++) {
+    RxDescList[i].sw_len = RX_DESC_BUF_SIZE;
+    RxDescList[i].command = 0;
+    RxDescList[i].next = virt_to_phys(&RxDescList[i + 1]);
+    RxDescList[i].buf = virt_to_phys(RxBuf + (i * RX_DESC_BUF_SIZE));
+    RxDescList[i].hw_len = 0;
+    RxDescList[i].status = 0;
+    
+    /* DMA IN cache bug. (struct etrax_dma_descr has the same layout as
+       USB_IN_Desc for the relevant fields.) */
+    prepare_rx_descriptor((struct etrax_dma_descr*)&RxDescList[i]);
+    
+  }
+  /* Special handling of last descriptor */
+  RxDescList[i].sw_len = RX_DESC_BUF_SIZE;
+  RxDescList[i].command = IO_STATE(USB_IN_command, eol, yes);
+  RxDescList[i].next = virt_to_phys(&RxDescList[0]);
+  RxDescList[i].buf = virt_to_phys(RxBuf + (i * RX_DESC_BUF_SIZE));
+  RxDescList[i].hw_len = 0;
+  RxDescList[i].status = 0;
+  
+  /* Setup list pointers that show progress in list */
+  myNextRxDesc = &RxDescList[0];
+  myLastRxDesc = &RxDescList[NBR_OF_RX_DESC - 1];
+  
+  flush_etrax_cache();
+  /* Point DMA to first descriptor in list and start it */
+  *R_DMA_CH9_FIRST = virt_to_phys(myNextRxDesc);
+  *R_DMA_CH9_CMD = IO_STATE(R_DMA_CH9_CMD, cmd, start);
+}
+
+
+static void tc_dma_init_tx_bulk_list(void) {
+  int i;
+  volatile struct USB_EP_Desc *epDescr;
+
+  for (i = 0; i < (NBR_OF_EPIDS - 1); i++) {
+    epDescr = &(TxBulkEPList[i]);
+    CHECK_ALIGN(epDescr);
+    epDescr->hw_len = 0;
+    epDescr->command = IO_FIELD(USB_EP_command, epid, i);
+    epDescr->sub = 0;
+    epDescr->next = virt_to_phys(&TxBulkEPList[i + 1]);
+
+    /* Initiate two EPs, disabled and with the eol flag set. No need for any
+       preserved epid. */
+    
+    /* The first one has the intr flag set so we get an interrupt when the DMA
+       channel is about to become disabled. */
+    CHECK_ALIGN(&TxBulkDummyEPList[i][0]);
+    TxBulkDummyEPList[i][0].hw_len = 0;
+    TxBulkDummyEPList[i][0].command = (IO_FIELD(USB_EP_command, epid, DUMMY_EPID) |
+				       IO_STATE(USB_EP_command, eol, yes) |
+				       IO_STATE(USB_EP_command, intr, yes));
+    TxBulkDummyEPList[i][0].sub = 0;
+    TxBulkDummyEPList[i][0].next = virt_to_phys(&TxBulkDummyEPList[i][1]);
+    
+    /* The second one. */
+    CHECK_ALIGN(&TxBulkDummyEPList[i][1]);
+    TxBulkDummyEPList[i][1].hw_len = 0;
+    TxBulkDummyEPList[i][1].command = (IO_FIELD(USB_EP_command, epid, DUMMY_EPID) |
+				       IO_STATE(USB_EP_command, eol, yes));
+    TxBulkDummyEPList[i][1].sub = 0;
+    /* The last dummy's next pointer is the same as the current EP's next pointer. */
+    TxBulkDummyEPList[i][1].next = virt_to_phys(&TxBulkEPList[i + 1]);
+  }
+
+  /* Special handling of last descr in list, make list circular */
+  epDescr = &TxBulkEPList[i];
+  CHECK_ALIGN(epDescr);
+  epDescr->hw_len = 0;
+  epDescr->command = IO_STATE(USB_EP_command, eol, yes) |
+    IO_FIELD(USB_EP_command, epid, i);
+  epDescr->sub = 0;
+  epDescr->next = virt_to_phys(&TxBulkEPList[0]);
+  
+  /* Init DMA sub-channel pointers to last item in each list */
+  *R_DMA_CH8_SUB0_EP = virt_to_phys(&TxBulkEPList[i]);
+  /* No point in starting the bulk channel yet.
+   *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start); */
+}
+
+static void tc_dma_init_tx_ctrl_list(void) {
+  int i;
+  volatile struct USB_EP_Desc *epDescr;
+
+  for (i = 0; i < (NBR_OF_EPIDS - 1); i++) {
+    epDescr = &(TxCtrlEPList[i]);
+    CHECK_ALIGN(epDescr);
+    epDescr->hw_len = 0;
+    epDescr->command = IO_FIELD(USB_EP_command, epid, i);
+    epDescr->sub = 0;
+    epDescr->next = virt_to_phys(&TxCtrlEPList[i + 1]);
+  }
+  /* Special handling of last descr in list, make list circular */
+  epDescr = &TxCtrlEPList[i];
+  CHECK_ALIGN(epDescr);
+  epDescr->hw_len = 0;
+  epDescr->command = IO_STATE(USB_EP_command, eol, yes) |
+    IO_FIELD(USB_EP_command, epid, i);
+  epDescr->sub = 0;
+  epDescr->next = virt_to_phys(&TxCtrlEPList[0]);
+  
+  /* Init DMA sub-channel pointers to last item in each list */
+  *R_DMA_CH8_SUB1_EP = virt_to_phys(&TxCtrlEPList[i]);
+  /* No point in starting the ctrl channel yet.
+   *R_DMA_CH8_SUB1_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start); */
+}
+
+
+static void tc_dma_init_tx_intr_list(void) {
+  int i;
+
+  TxIntrSB_zout.sw_len = 1;
+  TxIntrSB_zout.next = 0;
+  TxIntrSB_zout.buf = virt_to_phys(&zout_buffer[0]);
+  TxIntrSB_zout.command = (IO_FIELD(USB_SB_command, rem, 0) |
+			   IO_STATE(USB_SB_command, tt, zout) |
+			   IO_STATE(USB_SB_command, full, yes) |
+			   IO_STATE(USB_SB_command, eot, yes) |
+			   IO_STATE(USB_SB_command, eol, yes));
+  
+  for (i = 0; i < (MAX_INTR_INTERVAL - 1); i++) {
+    CHECK_ALIGN(&TxIntrEPList[i]);
+    TxIntrEPList[i].hw_len = 0;
+    TxIntrEPList[i].command =
+      (IO_STATE(USB_EP_command, eof, yes) |
+       IO_STATE(USB_EP_command, enable, yes) |
+       IO_FIELD(USB_EP_command, epid, INVALID_EPID));
+    TxIntrEPList[i].sub = virt_to_phys(&TxIntrSB_zout);
+    TxIntrEPList[i].next = virt_to_phys(&TxIntrEPList[i + 1]);
+  }
+
+  /* Special handling of last descr in list, make list circular */
+  CHECK_ALIGN(&TxIntrEPList[i]);
+  TxIntrEPList[i].hw_len = 0;
+  TxIntrEPList[i].command =
+    (IO_STATE(USB_EP_command, eof, yes) |
+     IO_STATE(USB_EP_command, eol, yes) |
+     IO_STATE(USB_EP_command, enable, yes) |
+     IO_FIELD(USB_EP_command, epid, INVALID_EPID));
+  TxIntrEPList[i].sub = virt_to_phys(&TxIntrSB_zout);
+  TxIntrEPList[i].next = virt_to_phys(&TxIntrEPList[0]);
+
+  intr_dbg("Initiated Intr EP descriptor list\n");
+
+
+  /* Connect DMA 8 sub-channel 2 to first in list */
+  *R_DMA_CH8_SUB2_EP = virt_to_phys(&TxIntrEPList[0]);
+}
+
+static void tc_dma_init_tx_isoc_list(void) {
+  int i;
+
+  DBFENTER;
+
+  /* Read comment at zout_buffer declaration for an explanation to this. */
+  TxIsocSB_zout.sw_len = 1;
+  TxIsocSB_zout.next = 0;
+  TxIsocSB_zout.buf = virt_to_phys(&zout_buffer[0]);
+  TxIsocSB_zout.command = (IO_FIELD(USB_SB_command, rem, 0) |
+			   IO_STATE(USB_SB_command, tt, zout) |
+			   IO_STATE(USB_SB_command, full, yes) |
+			   IO_STATE(USB_SB_command, eot, yes) |
+			   IO_STATE(USB_SB_command, eol, yes));
+
+  /* The last isochronous EP descriptor is a dummy. */
+  for (i = 0; i < (NBR_OF_EPIDS - 1); i++) {
+    CHECK_ALIGN(&TxIsocEPList[i]);
+    TxIsocEPList[i].hw_len = 0;
+    TxIsocEPList[i].command = IO_FIELD(USB_EP_command, epid, i);
+    TxIsocEPList[i].sub = 0;
+    TxIsocEPList[i].next = virt_to_phys(&TxIsocEPList[i + 1]);
+  }
+
+  CHECK_ALIGN(&TxIsocEPList[i]);
+  TxIsocEPList[i].hw_len = 0;
+
+  /* Must enable the last EP descr to get eof interrupt. */
+  TxIsocEPList[i].command = (IO_STATE(USB_EP_command, enable, yes) |
+			     IO_STATE(USB_EP_command, eof, yes) |
+			     IO_STATE(USB_EP_command, eol, yes) |
+			     IO_FIELD(USB_EP_command, epid, INVALID_EPID));
+  TxIsocEPList[i].sub = virt_to_phys(&TxIsocSB_zout);
+  TxIsocEPList[i].next = virt_to_phys(&TxIsocEPList[0]);
+
+  *R_DMA_CH8_SUB3_EP = virt_to_phys(&TxIsocEPList[0]);
+  *R_DMA_CH8_SUB3_CMD = IO_STATE(R_DMA_CH8_SUB3_CMD, cmd, start);
+}
+
+static int tc_dma_init(struct usb_hcd *hcd) {
+  tc_dma_init_rx_list();
+  tc_dma_init_tx_bulk_list();
+  tc_dma_init_tx_ctrl_list();
+  tc_dma_init_tx_intr_list();
+  tc_dma_init_tx_isoc_list();
+
+  if (cris_request_dma(USB_TX_DMA_NBR,
+		       "ETRAX 100LX built-in USB (Tx)",
+		       DMA_VERBOSE_ON_ERROR,
+		       dma_usb)) {
+    err("Could not allocate DMA ch 8 for USB");
+    return -EBUSY;
+  }
+ 	
+  if (cris_request_dma(USB_RX_DMA_NBR,
+		       "ETRAX 100LX built-in USB (Rx)",
+		       DMA_VERBOSE_ON_ERROR,
+		       dma_usb)) {
+    err("Could not allocate DMA ch 9 for USB");
+    return -EBUSY;
+  }
+
+  *R_IRQ_MASK2_SET =
+    /* Note that these interrupts are not used. */
+    IO_STATE(R_IRQ_MASK2_SET, dma8_sub0_descr, set) |
+    /* Sub channel 1 (ctrl) descr. interrupts are used. */
+    IO_STATE(R_IRQ_MASK2_SET, dma8_sub1_descr, set) |
+    IO_STATE(R_IRQ_MASK2_SET, dma8_sub2_descr, set) |
+    /* Sub channel 3 (isoc) descr. interrupts are used. */
+    IO_STATE(R_IRQ_MASK2_SET, dma8_sub3_descr, set);
+  
+  /* Note that the dma9_descr interrupt is not used. */
+  *R_IRQ_MASK2_SET =
+    IO_STATE(R_IRQ_MASK2_SET, dma9_eop, set) |
+    IO_STATE(R_IRQ_MASK2_SET, dma9_descr, set);
+
+  if (request_irq(ETRAX_USB_RX_IRQ, tc_dma_rx_interrupt, 0,
+		  "ETRAX 100LX built-in USB (Rx)", hcd)) {
+    err("Could not allocate IRQ %d for USB", ETRAX_USB_RX_IRQ);
+    return -EBUSY;
+  }
+  
+  if (request_irq(ETRAX_USB_TX_IRQ, tc_dma_tx_interrupt, 0,
+		  "ETRAX 100LX built-in USB (Tx)", hcd)) {
+    err("Could not allocate IRQ %d for USB", ETRAX_USB_TX_IRQ);
+    return -EBUSY;
+  }
+
+  return 0;
+}
+
+static void tc_dma_destroy(void) {
+  free_irq(ETRAX_USB_RX_IRQ, NULL);
+  free_irq(ETRAX_USB_TX_IRQ, NULL);
+
+  cris_free_dma(USB_TX_DMA_NBR, "ETRAX 100LX built-in USB (Tx)");
+  cris_free_dma(USB_RX_DMA_NBR, "ETRAX 100LX built-in USB (Rx)");
+
+}
+
+static void tc_dma_link_intr_urb(struct urb *urb);
+
+/* Handle processing of Bulk, Ctrl and Intr queues */
+static void tc_dma_process_queue(int epid) {
+  struct urb *urb;
+  struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+  unsigned long flags;
+  char toggle;
+
+  if(epid_state[epid].disabled) {
+    /* Don't process any URBs on a disabled endpoint */
+    return;
+  }
+
+  /* Do not disturb us while fiddling with EPs and epids */
+  local_irq_save(flags);
+
+  /* For bulk, Ctrl and Intr can we only have one URB active at a time for
+     a specific EP. */
+  if(activeUrbList[epid] != NULL) {
+    /* An URB is already active on EP, skip checking queue */
+    local_irq_restore(flags);
+    return;
+  }
+
+  urb = urb_list_first(epid);
+  if(urb == NULL) {
+    /* No URB waiting in EP queue. Nothing do to */
+    local_irq_restore(flags);
+    return;
+  }
+
+  urb_priv = urb->hcpriv;
+  ASSERT(urb_priv != NULL);
+  ASSERT(urb_priv->urb_state == NOT_STARTED);
+  ASSERT(!usb_pipeisoc(urb->pipe));
+
+  /* Remove this URB from the queue and move it to active */
+  activeUrbList[epid] = urb;
+  urb_list_del(urb, epid);
+
+  urb_priv->urb_state = STARTED;
+
+  /* Reset error counters (regardless of which direction this traffic is). */
+  etrax_epid_clear_error(epid);
+
+  /* Special handling of Intr EP lists */
+  if(usb_pipeint(urb->pipe)) {
+    tc_dma_link_intr_urb(urb);
+    local_irq_restore(flags);
+    return;
+  }
+
+  /* Software must preset the toggle bits for Bulk and Ctrl */
+  if(usb_pipecontrol(urb->pipe)) {
+    /* Toggle bits are initialized only during setup transaction in a
+       CTRL transfer */
+    etrax_epid_set_toggle(epid, 0, 0);
+    etrax_epid_set_toggle(epid, 1, 0);
+  } else {
+    toggle = usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
+			   usb_pipeout(urb->pipe));
+    etrax_epid_set_toggle(epid, usb_pipeout(urb->pipe), toggle);
+  }
+
+  tc_dbg("Added SBs from (URB:0x%x %s %s) to epid %d: %s\n",
+	 (unsigned int)urb, str_dir(urb->pipe), str_type(urb->pipe), epid,
+	 sblist_to_str(urb_priv->first_sb));
+
+  /* We start the DMA sub channel without checking if it's running or not,
+     because:
+     1) If it's already running, issuing the start command is a nop.
+     2) We avoid a test-and-set race condition. */
+  switch(usb_pipetype(urb->pipe)) {
+  case PIPE_BULK:
+    /* Assert that the EP descriptor is disabled. */
+    ASSERT(!(TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)));
+
+    /* Set up and enable the EP descriptor. */
+    TxBulkEPList[epid].sub = virt_to_phys(urb_priv->first_sb);
+    TxBulkEPList[epid].hw_len = 0;
+    TxBulkEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
+
+    /* Check if the dummy list is already with us (if several urbs were queued). */
+    if (usb_pipein(urb->pipe) && (TxBulkEPList[epid].next != virt_to_phys(&TxBulkDummyEPList[epid][0]))) {
+      tc_dbg("Inviting dummy list to the party for urb 0x%lx, epid %d", 
+	     (unsigned long)urb, epid);
+      
+      /* We don't need to check if the DMA is at this EP or not before changing the
+	 next pointer, since we will do it in one 32-bit write (EP descriptors are
+	 32-bit aligned). */
+      TxBulkEPList[epid].next = virt_to_phys(&TxBulkDummyEPList[epid][0]);
+    }
+
+    restart_dma8_sub0();
+
+    /* Update/restart the bulk start timer since we just started the channel.*/
+    mod_timer(&bulk_start_timer, jiffies + BULK_START_TIMER_INTERVAL);
+    /* Update/restart the bulk eot timer since we just inserted traffic. */
+    mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL);
+    break;
+  case PIPE_CONTROL:
+    /* Assert that the EP descriptor is disabled. */
+    ASSERT(!(TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)));
+
+    /* Set up and enable the EP descriptor. */
+    TxCtrlEPList[epid].sub = virt_to_phys(urb_priv->first_sb);
+    TxCtrlEPList[epid].hw_len = 0;
+    TxCtrlEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
+
+    *R_DMA_CH8_SUB1_CMD = IO_STATE(R_DMA_CH8_SUB1_CMD, cmd, start);
+    break;
+  }
+  local_irq_restore(flags);
+}
+
+static void tc_dma_link_intr_urb(struct urb *urb) {
+  struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+  volatile struct USB_EP_Desc *tmp_ep;
+  struct USB_EP_Desc *ep_desc;
+  int i = 0, epid;
+  int pool_idx = 0;
+
+  ASSERT(urb_priv != NULL);
+  epid = urb_priv->epid;
+  ASSERT(urb_priv->interval > 0);
+  ASSERT(urb_priv->intr_ep_pool_length > 0);
+
+  tmp_ep = &TxIntrEPList[0];
+
+  /* Only insert one EP descriptor in list for Out Intr URBs.
+     We can only handle Out Intr with interval of 128ms because
+     it's not possible to insert several Out Intr EPs because they
+     are not consumed by the DMA. */
+  if(usb_pipeout(urb->pipe)) {
+    ep_desc = urb_priv->intr_ep_pool[0];
+    ASSERT(ep_desc);
+    ep_desc->next = tmp_ep->next;
+    tmp_ep->next = virt_to_phys(ep_desc);
+    i++;
+  } else {
+    /* Loop through Intr EP descriptor list and insert EP for URB at
+       specified interval */
+    do {
+      /* Each EP descriptor with eof flag sat signals a new frame */
+      if (tmp_ep->command & IO_MASK(USB_EP_command, eof)) {
+	/* Insert a EP from URBs EP pool at correct interval */
+	if ((i % urb_priv->interval) == 0) {
+	  ep_desc = urb_priv->intr_ep_pool[pool_idx];
+	  ASSERT(ep_desc);
+	  ep_desc->next = tmp_ep->next;
+	  tmp_ep->next = virt_to_phys(ep_desc);
+	  pool_idx++;
+	  ASSERT(pool_idx <= urb_priv->intr_ep_pool_length);
 	}
+	i++;
+      }
+      tmp_ep = (struct USB_EP_Desc *)phys_to_virt(tmp_ep->next);
+    } while(tmp_ep != &TxIntrEPList[0]);
+  }
+
+  intr_dbg("Added SBs to intr epid %d: %s interval:%d (%d EP)\n", epid,
+	   sblist_to_str(urb_priv->first_sb), urb_priv->interval, pool_idx);
+
+  /* We start the DMA sub channel without checking if it's running or not,
+     because:
+     1) If it's already running, issuing the start command is a nop.
+     2) We avoid a test-and-set race condition. */
+  *R_DMA_CH8_SUB2_CMD = IO_STATE(R_DMA_CH8_SUB2_CMD, cmd, start);
+}
+
+static void tc_dma_process_isoc_urb(struct urb *urb) {
+  unsigned long flags;
+  struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+  int epid;
+
+  /* Do not disturb us while fiddling with EPs and epids */
+  local_irq_save(flags);
+
+  ASSERT(urb_priv);
+  ASSERT(urb_priv->first_sb);
+  epid = urb_priv->epid;
+
+  if(activeUrbList[epid] == NULL) {
+    /* EP is idle, so make this URB active */
+    activeUrbList[epid] = urb;
+    urb_list_del(urb, epid);
+    ASSERT(TxIsocEPList[epid].sub == 0);
+    ASSERT(!(TxIsocEPList[epid].command &
+	     IO_STATE(USB_EP_command, enable, yes)));
+
+    /* Differentiate between In and Out Isoc. Because In SBs are not consumed*/
+    if(usb_pipein(urb->pipe)) {
+    /* Each EP for In Isoc will have only one SB descriptor, setup when
+       submitting the first active urb. We do it here by copying from URBs
+       pre-allocated SB. */
+      memcpy((void *)&(TxIsocSBList[epid]), urb_priv->first_sb,
+	     sizeof(TxIsocSBList[epid]));
+      TxIsocEPList[epid].hw_len = 0;
+      TxIsocEPList[epid].sub = virt_to_phys(&(TxIsocSBList[epid]));
+    } else {
+      /* For Out Isoc we attach the pre-allocated list of SBs for the URB */
+      TxIsocEPList[epid].hw_len = 0;
+      TxIsocEPList[epid].sub = virt_to_phys(urb_priv->first_sb);
+
+      isoc_dbg("Attached first URB:0x%x[%d] to epid:%d first_sb:0x%x"
+	       " last_sb::0x%x\n",
+	       (unsigned int)urb, urb_priv->urb_num, epid,
+	       (unsigned int)(urb_priv->first_sb),
+	       (unsigned int)(urb_priv->last_sb));
+    }
+
+    if (urb->transfer_flags & URB_ISO_ASAP) {
+      /* The isoc transfer should be started as soon as possible. The
+	 start_frame field is a return value if URB_ISO_ASAP was set. Comparing
+	 R_USB_FM_NUMBER with a USB Chief trace shows that the first isoc IN
+	 token is sent 2 frames later. I'm not sure how this affects usage of
+	 the start_frame field by the device driver, or how it affects things
+	 when USB_ISO_ASAP is not set, so therefore there's no compensation for
+	 the 2 frame "lag" here. */
+      urb->start_frame = (*R_USB_FM_NUMBER & 0x7ff);
+      TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
+      urb_priv->urb_state = STARTED;
+      isoc_dbg("URB_ISO_ASAP set, urb->start_frame set to %d\n",
+	       urb->start_frame);
+    } else {
+      /* Not started yet. */
+      urb_priv->urb_state = NOT_STARTED;
+      isoc_warn("urb_priv->urb_state set to NOT_STARTED for URB:0x%x\n",
+		(unsigned int)urb);
+    }
+
+  } else {
+    /* An URB is already active on the EP. Leave URB in queue and let
+       finish_isoc_urb process it after current active URB */
+    ASSERT(TxIsocEPList[epid].sub != 0);
+
+    if(usb_pipein(urb->pipe)) {
+      /* Because there already is a active In URB on this epid we do nothing
+         and the finish_isoc_urb() function will handle switching to next URB*/
+
+    } else { /* For Out Isoc, insert new URBs traffic last in SB-list. */
+      struct USB_SB_Desc *temp_sb_desc;
+
+      /* Set state STARTED to all Out Isoc URBs added to SB list because we
+         don't know how many of them that are finished before descr interrupt*/
+      urb_priv->urb_state = STARTED;
+
+      /* Find end of current SB list by looking for SB with eol flag sat */
+      temp_sb_desc = phys_to_virt(TxIsocEPList[epid].sub);
+      while ((temp_sb_desc->command & IO_MASK(USB_SB_command, eol)) !=
+	     IO_STATE(USB_SB_command, eol, yes)) {
+	ASSERT(temp_sb_desc->next);
+	temp_sb_desc = phys_to_virt(temp_sb_desc->next);
+      }
+
+      isoc_dbg("Appended URB:0x%x[%d] (first:0x%x last:0x%x) to epid:%d"
+	       " sub:0x%x eol:0x%x\n",
+	       (unsigned int)urb, urb_priv->urb_num,
+	       (unsigned int)(urb_priv->first_sb),
+	       (unsigned int)(urb_priv->last_sb), epid,
+	       (unsigned int)phys_to_virt(TxIsocEPList[epid].sub),
+	       (unsigned int)temp_sb_desc);
+
+      /* Next pointer must be set before eol is removed. */
+      temp_sb_desc->next = virt_to_phys(urb_priv->first_sb);
+      /* Clear the previous end of list flag since there is a new in the
+	 added SB descriptor list. */
+      temp_sb_desc->command &= ~IO_MASK(USB_SB_command, eol);
+
+      if (!(TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable))) {
+	__u32 epid_data;
+	/* 8.8.5 in Designer's Reference says we should check for and correct
+	   any errors in the EP here.  That should not be necessary if
+	   epid_attn is handled correctly, so we assume all is ok. */
+	epid_data = etrax_epid_iso_get(epid);
+	if (IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data) !=
+	    IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) {
+	  isoc_err("Disabled Isoc EP with error:%d on epid:%d when appending"
+		   " URB:0x%x[%d]\n",
+		   IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data), epid,
+		   (unsigned int)urb, urb_priv->urb_num);
+	}
+
+	/* The SB list was exhausted. */
+	if (virt_to_phys(urb_priv->last_sb) != TxIsocEPList[epid].sub) {
+	  /* The new sublist did not get processed before the EP was
+	     disabled.  Setup the EP again. */
+
+	  if(virt_to_phys(temp_sb_desc) == TxIsocEPList[epid].sub) {
+	    isoc_dbg("EP for epid:%d stoped at SB:0x%x before newly inserted"
+		     ", restarting from this URBs SB:0x%x\n",
+		     epid, (unsigned int)temp_sb_desc,
+		     (unsigned int)(urb_priv->first_sb));
+	    TxIsocEPList[epid].hw_len = 0;
+	    TxIsocEPList[epid].sub = virt_to_phys(urb_priv->first_sb);
+	    urb->start_frame = (*R_USB_FM_NUMBER & 0x7ff);
+	    /* Enable the EP again so data gets processed this time */
+	    TxIsocEPList[epid].command |=
+	      IO_STATE(USB_EP_command, enable, yes);
+
+	  } else {
+	    /* The EP has been disabled but not at end this URB (god knows
+	       where). This should generate an epid_attn so we should not be
+	       here */
+	    isoc_warn("EP was disabled on sb:0x%x before SB list for"
+		     " URB:0x%x[%d] got processed\n",
+		     (unsigned int)phys_to_virt(TxIsocEPList[epid].sub),
+		     (unsigned int)urb, urb_priv->urb_num);
+	  }
+	} else {
+	  /* This might happend if we are slow on this function and isn't
+	     an error. */
+	  isoc_dbg("EP was disabled and finished with SBs from appended"
+		   " URB:0x%x[%d]\n", (unsigned int)urb, urb_priv->urb_num);
+	}
+      }
+    }
+  }
+  
+  /* Start the DMA sub channel */
+  *R_DMA_CH8_SUB3_CMD = IO_STATE(R_DMA_CH8_SUB3_CMD, cmd, start);
+
+  local_irq_restore(flags);
+}
+
+static void tc_dma_unlink_intr_urb(struct urb *urb) {
+  struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+  volatile struct USB_EP_Desc *first_ep;  /* First EP in the list. */
+  volatile struct USB_EP_Desc *curr_ep;   /* Current EP, the iterator. */
+  volatile struct USB_EP_Desc *next_ep;   /* The EP after current. */
+  volatile struct USB_EP_Desc *unlink_ep; /* The one we should remove from
+					     the list. */
+  int count = 0;
+  volatile int timeout = 10000;
+  int epid;
+
+  /* Read 8.8.4 in Designer's Reference, "Removing an EP Descriptor from the
+     List". */
+  ASSERT(urb_priv);
+  ASSERT(urb_priv->intr_ep_pool_length > 0);
+  epid = urb_priv->epid;
+
+  /* First disable all Intr EPs belonging to epid for this URB */
+  first_ep = &TxIntrEPList[0];
+  curr_ep = first_ep;
+  do {
+    next_ep = (struct USB_EP_Desc *)phys_to_virt(curr_ep->next);
+    if (IO_EXTRACT(USB_EP_command, epid, next_ep->command) == epid) {
+      /* Disable EP */
+      next_ep->command &= ~IO_MASK(USB_EP_command, enable);
+    }
+    curr_ep = phys_to_virt(curr_ep->next);
+  } while (curr_ep != first_ep);
+
+
+  /* Now unlink all EPs belonging to this epid from Descr list */
+  first_ep = &TxIntrEPList[0];
+  curr_ep = first_ep;
+  do {
+    next_ep = (struct USB_EP_Desc *)phys_to_virt(curr_ep->next);
+    if (IO_EXTRACT(USB_EP_command, epid, next_ep->command) == epid) {
+      /* This is the one we should unlink. */
+      unlink_ep = next_ep;
+
+      /* Actually unlink the EP from the DMA list. */
+      curr_ep->next = unlink_ep->next;
+
+      /* Wait until the DMA is no longer at this descriptor. */
+      while((*R_DMA_CH8_SUB2_EP == virt_to_phys(unlink_ep)) &&
+	    (timeout-- > 0));
+      if(timeout == 0) {
+	warn("Timeout while waiting for DMA-TX-Intr to leave unlink EP\n");
+      }
+      
+      count++;
+    }
+    curr_ep = phys_to_virt(curr_ep->next);
+  } while (curr_ep != first_ep);
+
+  if(count != urb_priv->intr_ep_pool_length) {
+    intr_warn("Unlinked %d of %d Intr EPs for URB:0x%x[%d]\n", count,
+	      urb_priv->intr_ep_pool_length, (unsigned int)urb,
+	      urb_priv->urb_num);
+  } else {
+    intr_dbg("Unlinked %d of %d interrupt EPs for URB:0x%x\n", count,
+	     urb_priv->intr_ep_pool_length, (unsigned int)urb);
+  }
+}
+
+static void check_finished_bulk_tx_epids(struct usb_hcd *hcd,
+						    int timer) {
+  unsigned long flags;
+  int epid;
+  struct urb *urb;
+  struct crisv10_urb_priv * urb_priv;
+  __u32 epid_data;
+
+  /* Protect TxEPList */
+  local_irq_save(flags);
+
+  for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
+    /* A finished EP descriptor is disabled and has a valid sub pointer */
+    if (!(TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) &&
+	(TxBulkEPList[epid].sub != 0)) {
+
+      /* Get the active URB for this epid */
+      urb = activeUrbList[epid];
+      /* Sanity checks */
+      ASSERT(urb);
+      urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+      ASSERT(urb_priv);
+      
+      /* Only handle finished out Bulk EPs here,
+	 and let RX interrupt take care of the rest */
+      if(!epid_out_traffic(epid)) {
+	continue;
+      }
+
+      if(timer) {
+	tc_warn("Found finished %s Bulk epid:%d URB:0x%x[%d] from timeout\n",
+		epid_out_traffic(epid) ? "Out" : "In", epid, (unsigned int)urb,
+		urb_priv->urb_num);
+      } else {
+	tc_dbg("Found finished %s Bulk epid:%d URB:0x%x[%d] from interrupt\n",
+	       epid_out_traffic(epid) ? "Out" : "In", epid, (unsigned int)urb,
+	       urb_priv->urb_num);
+      }
+
+      if(urb_priv->urb_state == UNLINK) {
+	/* This Bulk URB is requested to be unlinked, that means that the EP
+	   has been disabled and we might not have sent all data */
+	tc_finish_urb(hcd, urb, urb->status);
+	continue;
+      }
+
+      ASSERT(urb_priv->urb_state == STARTED);
+      if (phys_to_virt(TxBulkEPList[epid].sub) != urb_priv->last_sb) {
+	tc_err("Endpoint got disabled before reaching last sb\n");
+      }
+	
+      epid_data = etrax_epid_get(epid);
+      if (IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data) ==
+	  IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) {
+	/* This means that the endpoint has no error, is disabled
+	   and had inserted traffic, i.e. transfer successfully completed. */
+	tc_finish_urb(hcd, urb, 0);
+      } else {
+	/* Shouldn't happen. We expect errors to be caught by epid
+	   attention. */
+	tc_err("Found disabled bulk EP desc (epid:%d error:%d)\n",
+	       epid, IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data));
+      }
+    } else {
+      tc_dbg("Ignoring In Bulk epid:%d, let RX interrupt handle it\n", epid);
+    }
+  }
+
+  local_irq_restore(flags);
+}
+
+static void check_finished_ctrl_tx_epids(struct usb_hcd *hcd) {
+  unsigned long flags;
+  int epid;
+  struct urb *urb;
+  struct crisv10_urb_priv * urb_priv;
+  __u32 epid_data;
+
+  /* Protect TxEPList */
+  local_irq_save(flags);
+
+  for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
+    if(epid == DUMMY_EPID)
+      continue;
+
+    /* A finished EP descriptor is disabled and has a valid sub pointer */
+    if (!(TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)) &&
+	(TxCtrlEPList[epid].sub != 0)) {
+      
+      /* Get the active URB for this epid */
+      urb = activeUrbList[epid];
+
+      if(urb == NULL) {
+	tc_warn("Found finished Ctrl epid:%d with no active URB\n", epid);
+	continue;
+      }
+      
+      /* Sanity checks */
+      ASSERT(usb_pipein(urb->pipe));
+      urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+      ASSERT(urb_priv);
+      if (phys_to_virt(TxCtrlEPList[epid].sub) != urb_priv->last_sb) {
+	tc_err("Endpoint got disabled before reaching last sb\n");
+      }
+
+      epid_data = etrax_epid_get(epid);
+      if (IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data) ==
+	  IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) {
+	/* This means that the endpoint has no error, is disabled
+	   and had inserted traffic, i.e. transfer successfully completed. */
+
+	/* Check if RX-interrupt for In Ctrl has been processed before
+	   finishing the URB */
+	if(urb_priv->ctrl_rx_done) {
+	  tc_dbg("Finishing In Ctrl URB:0x%x[%d] in tx_interrupt\n",
+		 (unsigned int)urb, urb_priv->urb_num);
+	  tc_finish_urb(hcd, urb, 0);
+	} else {
+	  /* If we get zout descriptor interrupt before RX was done for a
+	     In Ctrl transfer, then we flag that and it will be finished
+	     in the RX-Interrupt */
+	  urb_priv->ctrl_zout_done = 1;
+	  tc_dbg("Got zout descr interrupt before RX interrupt\n");
+	}
+      } else {
+	/* Shouldn't happen. We expect errors to be caught by epid
+	   attention. */
+	tc_err("Found disabled Ctrl EP desc (epid:%d URB:0x%x[%d]) error_code:%d\n", epid, (unsigned int)urb, urb_priv->urb_num, IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data));
+	__dump_ep_desc(&(TxCtrlEPList[epid]));
+	__dump_ept_data(epid);
+      }      
+    }
+  }
+  local_irq_restore(flags);
+}
+
+/* This function goes through all epids that are setup for Out Isoc transfers
+   and marks (isoc_out_done) all queued URBs that the DMA has finished
+   transfer for.
+   No URB completetion is done here to make interrupt routine return quickly.
+   URBs are completed later with help of complete_isoc_bottom_half() that
+   becomes schedules when this functions is finished. */
+static void check_finished_isoc_tx_epids(void) {
+  unsigned long flags;
+  int epid;
+  struct urb *urb;
+  struct crisv10_urb_priv * urb_priv;
+  struct USB_SB_Desc* sb_desc;
+  int epid_done;
+
+  /* Protect TxIsocEPList */
+  local_irq_save(flags);
+
+  for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
+    if (TxIsocEPList[epid].sub == 0 || epid == INVALID_EPID ||
+	!epid_out_traffic(epid)) {
+      /* Nothing here to see. */
+      continue;
+    }
+    ASSERT(epid_inuse(epid));
+    ASSERT(epid_isoc(epid));
+
+    sb_desc = phys_to_virt(TxIsocEPList[epid].sub);
+    /* Find the last descriptor of the currently active URB for this ep.
+       This is the first descriptor in the sub list marked for a descriptor
+       interrupt. */
+    while (sb_desc && !IO_EXTRACT(USB_SB_command, intr, sb_desc->command)) {
+      sb_desc = sb_desc->next ? phys_to_virt(sb_desc->next) : 0;
+    }
+    ASSERT(sb_desc);
+
+    isoc_dbg("Descr IRQ checking epid:%d sub:0x%x intr:0x%x\n",
+	     epid, (unsigned int)phys_to_virt(TxIsocEPList[epid].sub),
+	     (unsigned int)sb_desc);
+
+    urb = activeUrbList[epid];
+    if(urb == NULL) {
+      isoc_err("Isoc Descr irq on epid:%d with no active URB\n", epid);
+      continue;
+    }
+
+    epid_done = 0;
+    while(urb && !epid_done) {
+      /* Sanity check. */
+      ASSERT(usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS);
+      ASSERT(usb_pipeout(urb->pipe));
+      
+      urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+      ASSERT(urb_priv);
+      ASSERT(urb_priv->urb_state == STARTED ||
+	     urb_priv->urb_state == UNLINK);
+      
+      if (sb_desc != urb_priv->last_sb) {
+	/* This urb has been sent. */
+	urb_priv->isoc_out_done = 1;
+
+      } else { /* Found URB that has last_sb as the interrupt reason */
+
+	/* Check if EP has been disabled, meaning that all transfers are done*/
+	if(!(TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable))) {
+	  ASSERT((sb_desc->command & IO_MASK(USB_SB_command, eol)) ==
+		 IO_STATE(USB_SB_command, eol, yes));
+	  ASSERT(sb_desc->next == 0);
+	  urb_priv->isoc_out_done = 1;
+	} else {
+	  isoc_dbg("Skipping URB:0x%x[%d] because EP not disabled yet\n",
+		   (unsigned int)urb, urb_priv->urb_num);
+	}
+	/* Stop looking any further in queue */
+	epid_done = 1;	
+      }
+
+      if (!epid_done) {
+	if(urb == activeUrbList[epid]) {
+	  urb = urb_list_first(epid);
+	} else {
+	  urb = urb_list_next(urb, epid);
+	}
+      }
+    } /* END: while(urb && !epid_done) */
+  }
+
+  local_irq_restore(flags);
+}
+
+
+/* This is where the Out Isoc URBs are realy completed. This function is
+   scheduled from tc_dma_tx_interrupt() when one or more Out Isoc transfers
+   are done. This functions completes all URBs earlier marked with
+   isoc_out_done by fast interrupt routine check_finished_isoc_tx_epids() */
+
+static void complete_isoc_bottom_half(void *data) {
+  struct crisv10_isoc_complete_data *comp_data;
+  struct usb_iso_packet_descriptor *packet;
+  struct crisv10_urb_priv * urb_priv;
+  unsigned long flags;
+  struct urb* urb;
+  int epid_done;
+  int epid;
+  int i;
+
+  comp_data = (struct crisv10_isoc_complete_data*)data;
+
+  local_irq_save(flags);
+
+  for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) {
+    if(!epid_inuse(epid) || !epid_isoc(epid) || !epid_out_traffic(epid) || epid == DUMMY_EPID) {
+      /* Only check valid Out Isoc epids */
+      continue;
+    }
+
+    isoc_dbg("Isoc bottom-half checking epid:%d, sub:0x%x\n", epid,
+	     (unsigned int)phys_to_virt(TxIsocEPList[epid].sub));
+
+    /* The descriptor interrupt handler has marked all transmitted Out Isoc
+       URBs with isoc_out_done.  Now we traverse all epids and for all that
+       have out Isoc traffic we traverse its URB list and complete the
+       transmitted URBs. */
+    epid_done = 0;
+    while (!epid_done) {
+
+      /* Get the active urb (if any) */
+      urb = activeUrbList[epid];
+      if (urb == 0) {
+	isoc_dbg("No active URB on epid:%d anymore\n", epid);
+	epid_done = 1;
+	continue;
+      }
+
+      /* Sanity check. */
+      ASSERT(usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS);
+      ASSERT(usb_pipeout(urb->pipe));
+
+      urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+      ASSERT(urb_priv);
+
+      if (!(urb_priv->isoc_out_done)) {
+	/* We have reached URB that isn't flaged done yet, stop traversing. */
+	isoc_dbg("Stoped traversing Out Isoc URBs on epid:%d"
+		 " before not yet flaged URB:0x%x[%d]\n",
+		 epid, (unsigned int)urb, urb_priv->urb_num);
+	epid_done = 1;
+	continue;
+      }
+
+      /* This urb has been sent. */
+      isoc_dbg("Found URB:0x%x[%d] that is flaged isoc_out_done\n",
+	       (unsigned int)urb, urb_priv->urb_num);
+
+      /* Set ok on transfered packets for this URB and finish it */
+      for (i = 0; i < urb->number_of_packets; i++) {
+	packet = &urb->iso_frame_desc[i];
+	packet->status = 0;
+	packet->actual_length = packet->length;
+      }
+      urb_priv->isoc_packet_counter = urb->number_of_packets;
+      tc_finish_urb(comp_data->hcd, urb, 0);
+
+    } /* END: while(!epid_done) */
+  } /* END: for(epid...) */
+
+  local_irq_restore(flags);
+  kmem_cache_free(isoc_compl_cache, comp_data);
+}
+
+
+static void check_finished_intr_tx_epids(struct usb_hcd *hcd) {
+  unsigned long flags;
+  int epid;
+  struct urb *urb;
+  struct crisv10_urb_priv * urb_priv;
+  volatile struct USB_EP_Desc *curr_ep;   /* Current EP, the iterator. */
+  volatile struct USB_EP_Desc *next_ep;   /* The EP after current. */
+
+  /* Protect TxintrEPList */
+  local_irq_save(flags);
+
+  for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
+    if(!epid_inuse(epid) || !epid_intr(epid) || !epid_out_traffic(epid)) {
+      /* Nothing to see on this epid. Only check valid Out Intr epids */
+      continue;
+    }
+
+    urb = activeUrbList[epid];
+    if(urb == 0) {
+      intr_warn("Found Out Intr epid:%d with no active URB\n", epid);
+      continue;
+    }
+
+    /* Sanity check. */
+    ASSERT(usb_pipetype(urb->pipe) == PIPE_INTERRUPT);
+    ASSERT(usb_pipeout(urb->pipe));
+    
+    urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+    ASSERT(urb_priv);
+
+    /* Go through EPs between first and second sof-EP. It's here Out Intr EPs
+       are inserted.*/
+    curr_ep = &TxIntrEPList[0];
+    do {
+      next_ep = (struct USB_EP_Desc *)phys_to_virt(curr_ep->next);
+      if(next_ep == urb_priv->intr_ep_pool[0]) {
+	/* We found the Out Intr EP for this epid */
+	
+	/* Disable it so it doesn't get processed again */
+	next_ep->command &= ~IO_MASK(USB_EP_command, enable);
+
+	/* Finish the active Out Intr URB with status OK */
+	tc_finish_urb(hcd, urb, 0);
+      }
+      curr_ep = phys_to_virt(curr_ep->next);
+    } while (curr_ep != &TxIntrEPList[1]);
+
+  }
+  local_irq_restore(flags);
+}
+
+/* Interrupt handler for DMA8/IRQ24 with subchannels (called from hardware intr) */
+static irqreturn_t tc_dma_tx_interrupt(int irq, void *vhc) {
+  struct usb_hcd *hcd = (struct usb_hcd*)vhc;
+  ASSERT(hcd);
+
+  if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub0_descr)) {
+    /* Clear this interrupt */
+    *R_DMA_CH8_SUB0_CLR_INTR = IO_STATE(R_DMA_CH8_SUB0_CLR_INTR, clr_descr, do);
+    restart_dma8_sub0();
+  }
+
+  if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub1_descr)) {
+    /* Clear this interrupt */
+    *R_DMA_CH8_SUB1_CLR_INTR = IO_STATE(R_DMA_CH8_SUB1_CLR_INTR, clr_descr, do);
+    check_finished_ctrl_tx_epids(hcd);
+  }
+
+  if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub2_descr)) {
+    /* Clear this interrupt */
+    *R_DMA_CH8_SUB2_CLR_INTR = IO_STATE(R_DMA_CH8_SUB2_CLR_INTR, clr_descr, do);
+    check_finished_intr_tx_epids(hcd);
+  }
+
+  if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub3_descr)) {
+    struct crisv10_isoc_complete_data* comp_data;
+
+    /* Flag done Out Isoc for later completion */
+    check_finished_isoc_tx_epids();
+
+    /* Clear this interrupt */
+    *R_DMA_CH8_SUB3_CLR_INTR = IO_STATE(R_DMA_CH8_SUB3_CLR_INTR, clr_descr, do);
+    /* Schedule bottom half of Out Isoc completion function. This function
+       finishes the URBs marked with isoc_out_done */
+    comp_data = (struct crisv10_isoc_complete_data*)
+      kmem_cache_alloc(isoc_compl_cache, SLAB_ATOMIC);
+    ASSERT(comp_data != NULL);
+    comp_data ->hcd = hcd;
+
+    INIT_WORK(&comp_data->usb_bh, complete_isoc_bottom_half, comp_data);
+    schedule_work(&comp_data->usb_bh);
+  }
+
+  return IRQ_HANDLED;
+}
+
+/* Interrupt handler for DMA9/IRQ25 (called from hardware intr) */
+static irqreturn_t tc_dma_rx_interrupt(int irq, void *vhc) {
+  unsigned long flags;
+  struct urb *urb;
+  struct usb_hcd *hcd = (struct usb_hcd*)vhc;
+  struct crisv10_urb_priv *urb_priv;
+  int epid = 0;
+  int real_error;
+
+  ASSERT(hcd);
+
+  /* Clear this interrupt. */
+  *R_DMA_CH9_CLR_INTR = IO_STATE(R_DMA_CH9_CLR_INTR, clr_eop, do);
+
+  /* Custom clear interrupt for this interrupt */
+  /* The reason we cli here is that we call the driver's callback functions. */
+  local_irq_save(flags);
+
+  /* Note that this while loop assumes that all packets span only
+     one rx descriptor. */
+  while(myNextRxDesc->status & IO_MASK(USB_IN_status, eop)) {
+    epid = IO_EXTRACT(USB_IN_status, epid, myNextRxDesc->status);
+    /* Get the active URB for this epid */
+    urb = activeUrbList[epid];
+
+    ASSERT(epid_inuse(epid));
+    if (!urb) {
+      dma_err("No urb for epid %d in rx interrupt\n", epid);
+      goto skip_out;
+    }
+
+    /* Check if any errors on epid */
+    real_error = 0;
+    if (myNextRxDesc->status & IO_MASK(USB_IN_status, error)) {
+      __u32 r_usb_ept_data;
+
+      if (usb_pipeisoc(urb->pipe)) {
+	r_usb_ept_data = etrax_epid_iso_get(epid);
+	if((r_usb_ept_data & IO_MASK(R_USB_EPT_DATA_ISO, valid)) &&
+	   (IO_EXTRACT(R_USB_EPT_DATA_ISO, error_code, r_usb_ept_data) == 0) &&
+	   (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata))) {
+	  /* Not an error, just a failure to receive an expected iso
+	     in packet in this frame.  This is not documented
+	     in the designers reference. Continue processing.
+	  */
+	} else real_error = 1;
+      } else real_error = 1;
+    }
+
+    if(real_error) {
+      dma_err("Error in RX descr on epid:%d for URB 0x%x",
+	      epid, (unsigned int)urb);
+      dump_ept_data(epid);
+      dump_in_desc(myNextRxDesc);
+      goto skip_out;
+    }
+
+    urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+    ASSERT(urb_priv);
+    ASSERT(urb_priv->urb_state == STARTED ||
+	   urb_priv->urb_state == UNLINK);
+
+    if ((usb_pipetype(urb->pipe) == PIPE_BULK) ||
+	(usb_pipetype(urb->pipe) == PIPE_CONTROL) ||
+	(usb_pipetype(urb->pipe) == PIPE_INTERRUPT)) {
+
+      /* We get nodata for empty data transactions, and the rx descriptor's
+	 hw_len field is not valid in that case. No data to copy in other
+	 words. */
+      if (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata)) {
+	/* No data to copy */
+      } else {
+	/*
+	dma_dbg("Processing RX for URB:0x%x epid:%d (data:%d ofs:%d)\n",
+		(unsigned int)urb, epid, myNextRxDesc->hw_len,
+		urb_priv->rx_offset);
+	*/
+	/* Only copy data if URB isn't flaged to be unlinked*/
+	if(urb_priv->urb_state != UNLINK) {
+	  /* Make sure the data fits in the buffer. */
+	  if(urb_priv->rx_offset + myNextRxDesc->hw_len
+	     <= urb->transfer_buffer_length) {
+
+	    /* Copy the data to URBs buffer */
+	    memcpy(urb->transfer_buffer + urb_priv->rx_offset,
+		   phys_to_virt(myNextRxDesc->buf), myNextRxDesc->hw_len);
+	    urb_priv->rx_offset += myNextRxDesc->hw_len;
+	  } else {
+	    /* Signal overflow when returning URB */
+	    urb->status = -EOVERFLOW;
+	    tc_finish_urb_later(hcd, urb, urb->status);
+	  }
+	}
+      }
+
+      /* Check if it was the last packet in the transfer */
+      if (myNextRxDesc->status & IO_MASK(USB_IN_status, eot)) {
+	/* Special handling for In Ctrl URBs. */
+	if(usb_pipecontrol(urb->pipe) && usb_pipein(urb->pipe) &&
+	   !(urb_priv->ctrl_zout_done)) {
+	  /* Flag that RX part of Ctrl transfer is done. Because zout descr
+	     interrupt hasn't happend yet will the URB be finished in the
+	     TX-Interrupt. */
+	  urb_priv->ctrl_rx_done = 1;
+	  tc_dbg("Not finishing In Ctrl URB:0x%x from rx_interrupt, waiting"
+		 " for zout\n", (unsigned int)urb);
+	} else {
+	  tc_finish_urb(hcd, urb, 0);
+	}
+      }
+    } else { /* ISOC RX */
+      /*
+      isoc_dbg("Processing RX for epid:%d (URB:0x%x) ISOC pipe\n",
+	       epid, (unsigned int)urb);
+      */
+
+      struct usb_iso_packet_descriptor *packet;
+
+      if (urb_priv->urb_state == UNLINK) {
+	isoc_warn("Ignoring Isoc Rx data for urb being unlinked.\n");
+	goto skip_out;
+      } else if (urb_priv->urb_state == NOT_STARTED) {
+	isoc_err("What? Got Rx data for Isoc urb that isn't started?\n");
+	goto skip_out;
+      }
+
+      packet = &urb->iso_frame_desc[urb_priv->isoc_packet_counter];
+      ASSERT(packet);
+      packet->status = 0;
+
+      if (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata)) {
+	/* We get nodata for empty data transactions, and the rx descriptor's
+	   hw_len field is not valid in that case. We copy 0 bytes however to
+	   stay in synch. */
+	packet->actual_length = 0;
+      } else {
+	packet->actual_length = myNextRxDesc->hw_len;
+	/* Make sure the data fits in the buffer. */
+	ASSERT(packet->actual_length <= packet->length);
+	memcpy(urb->transfer_buffer + packet->offset,
+	       phys_to_virt(myNextRxDesc->buf), packet->actual_length);
+	if(packet->actual_length > 0)
+	  isoc_dbg("Copied %d bytes, packet %d for URB:0x%x[%d]\n",
+		   packet->actual_length, urb_priv->isoc_packet_counter,
+		   (unsigned int)urb, urb_priv->urb_num);
+      }
+
+      /* Increment the packet counter. */
+      urb_priv->isoc_packet_counter++;
+
+      /* Note that we don't care about the eot field in the rx descriptor's
+	 status. It will always be set for isoc traffic. */
+      if (urb->number_of_packets == urb_priv->isoc_packet_counter) {
+	/* Complete the urb with status OK. */
+	tc_finish_urb(hcd, urb, 0);
+      }
+    }
+
+  skip_out:
+    myNextRxDesc->status = 0;
+    myNextRxDesc->command |= IO_MASK(USB_IN_command, eol);
+    myLastRxDesc->command &= ~IO_MASK(USB_IN_command, eol);
+    myLastRxDesc = myNextRxDesc;
+    myNextRxDesc = phys_to_virt(myNextRxDesc->next);
+    flush_etrax_cache();
+    *R_DMA_CH9_CMD = IO_STATE(R_DMA_CH9_CMD, cmd, restart);
+  }
+
+  local_irq_restore(flags);
+
+  return IRQ_HANDLED;
+}
+
+static void tc_bulk_start_timer_func(unsigned long dummy) {
+  /* We might enable an EP descriptor behind the current DMA position when
+     it's about to decide that there are no more bulk traffic and it should
+     stop the bulk channel.
+     Therefore we periodically check if the bulk channel is stopped and there
+     is an enabled bulk EP descriptor, in which case we start the bulk
+     channel. */
+  
+  if (!(*R_DMA_CH8_SUB0_CMD & IO_MASK(R_DMA_CH8_SUB0_CMD, cmd))) {
+    int epid;
+
+    timer_dbg("bulk_start_timer: Bulk DMA channel not running.\n");
+
+    for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
+      if (TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+	timer_warn("Found enabled EP for epid %d, starting bulk channel.\n",
+		   epid);
+	restart_dma8_sub0();
+
+	/* Restart the bulk eot timer since we just started the bulk channel.*/
+	mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL);
+
+	/* No need to search any further. */
+	break;
+      }
+    }
+  } else {
+    timer_dbg("bulk_start_timer: Bulk DMA channel running.\n");
+  }
+}
+
+static void tc_bulk_eot_timer_func(unsigned long dummy) {
+  struct usb_hcd *hcd = (struct usb_hcd*)dummy;
+  ASSERT(hcd);
+  /* Because of a race condition in the top half, we might miss a bulk eot.
+     This timer "simulates" a bulk eot if we don't get one for a while,
+     hopefully correcting the situation. */
+  timer_dbg("bulk_eot_timer timed out.\n");
+  check_finished_bulk_tx_epids(hcd, 1);
+}
+
+
+/*************************************************************/
+/*************************************************************/
+/* Device driver block                                       */
+/*************************************************************/
+/*************************************************************/
+
+/* Forward declarations for device driver functions */
+static int devdrv_hcd_probe(struct device *);
+static int devdrv_hcd_remove(struct device *);
+#ifdef CONFIG_PM
+static int devdrv_hcd_suspend(struct device *, u32, u32);
+static int devdrv_hcd_resume(struct device *, u32);
+#endif /* CONFIG_PM */
+
+/* the device */
+static struct platform_device *devdrv_hc_platform_device;
+
+/* device driver interface */
+static struct device_driver devdrv_hc_device_driver = {
+  .name =			(char *) hc_name,
+  .bus =			&platform_bus_type,
+
+  .probe =		devdrv_hcd_probe,
+  .remove =		devdrv_hcd_remove,
+
+#ifdef CONFIG_PM
+  .suspend =		devdrv_hcd_suspend,
+  .resume =		devdrv_hcd_resume,
+#endif /* CONFIG_PM */
+};
 
-	CHECK_ALIGN(&TxIsocEPList[i]);
-	TxIsocEPList[i].hw_len = 0;
-
-	/* Must enable the last EP descr to get eof interrupt. */
-	TxIsocEPList[i].command = (IO_STATE(USB_EP_command, enable, yes) |
-				   IO_STATE(USB_EP_command, eof, yes) |
-				   IO_STATE(USB_EP_command, eol, yes) |
-				   IO_FIELD(USB_EP_command, epid, INVALID_EPID));
-	TxIsocEPList[i].sub = virt_to_phys(&TxIsocSB_zout);
-	TxIsocEPList[i].next = virt_to_phys(&TxIsocEPList[0]);
-
-	*R_DMA_CH8_SUB3_EP = virt_to_phys(&TxIsocEPList[0]);
-	*R_DMA_CH8_SUB3_CMD = IO_STATE(R_DMA_CH8_SUB3_CMD, cmd, start);
-
-	DBFEXIT;
-}
-
-static void etrax_usb_unlink_intr_urb(struct urb *urb)
+/* initialize the host controller and driver  */
+static int __init_or_module devdrv_hcd_probe(struct device *dev)
 {
-	volatile USB_EP_Desc_t *first_ep;  /* First EP in the list. */
-	volatile USB_EP_Desc_t *curr_ep;   /* Current EP, the iterator. */
-	volatile USB_EP_Desc_t *next_ep;   /* The EP after current. */
-	volatile USB_EP_Desc_t *unlink_ep; /* The one we should remove from the list. */
-
-	int epid;
-
-	/* Read 8.8.4 in Designer's Reference, "Removing an EP Descriptor from the List". */
-
-	DBFENTER;
-
-	epid = ((etrax_urb_priv_t *)urb->hcpriv)->epid;
-
-	first_ep = &TxIntrEPList[0];
-	curr_ep = first_ep;
-
-
-	/* Note that this loop removes all EP descriptors with this epid. This assumes
-	   that all EP descriptors belong to the one and only urb for this epid. */
-
-	do {
-		next_ep = (USB_EP_Desc_t *)phys_to_virt(curr_ep->next);
-
-		if (IO_EXTRACT(USB_EP_command, epid, next_ep->command) == epid) {
-
-			dbg_intr("Found EP to unlink for epid %d", epid);
-
-			/* This is the one we should unlink. */
-			unlink_ep = next_ep;
-
-			/* Actually unlink the EP from the DMA list. */
-			curr_ep->next = unlink_ep->next;
-
-			/* Wait until the DMA is no longer at this descriptor. */
-			while (*R_DMA_CH8_SUB2_EP == virt_to_phys(unlink_ep));
+  struct usb_hcd *hcd;
+  struct crisv10_hcd *crisv10_hcd;
+  int retval;
+
+  /* Check DMA burst length */
+  if(IO_EXTRACT(R_BUS_CONFIG, dma_burst, *R_BUS_CONFIG) !=
+     IO_STATE(R_BUS_CONFIG, dma_burst, burst32)) {
+    devdrv_err("Invalid DMA burst length in Etrax 100LX,"
+	       " needs to be 32\n");
+    return -EPERM;
+  }
+
+  hcd = usb_create_hcd(&crisv10_hc_driver, dev, dev->bus_id);
+  if (!hcd)
+    return -ENOMEM;
+
+  crisv10_hcd = hcd_to_crisv10_hcd(hcd);
+  spin_lock_init(&crisv10_hcd->lock);
+  crisv10_hcd->num_ports = num_ports();
+  crisv10_hcd->running = 0;
+
+  dev_set_drvdata(dev, crisv10_hcd);
+
+  devdrv_dbg("ETRAX USB IRQs HC:%d  RX:%d  TX:%d\n", ETRAX_USB_HC_IRQ,
+	  ETRAX_USB_RX_IRQ, ETRAX_USB_TX_IRQ);
+
+  /* Print out chip version read from registers */
+  int rev_maj = *R_USB_REVISION & IO_MASK(R_USB_REVISION, major);
+  int rev_min = *R_USB_REVISION & IO_MASK(R_USB_REVISION, minor);
+  if(rev_min == 0) {
+    devdrv_info("Etrax 100LX USB Revision %d v1,2\n", rev_maj);
+  } else {
+    devdrv_info("Etrax 100LX USB Revision %d v%d\n", rev_maj, rev_min);
+  }
+
+  devdrv_info("Bulk timer interval, start:%d eot:%d\n",
+	      BULK_START_TIMER_INTERVAL,
+	      BULK_EOT_TIMER_INTERVAL);
+
+
+  /* Init root hub data structures */
+  if(rh_init()) {
+    devdrv_err("Failed init data for Root Hub\n");
+    retval = -ENOMEM;
+  }
+
+  if(port_in_use(0)) {
+    if (cris_request_io_interface(if_usb_1, "ETRAX100LX USB-HCD")) {
+      printk(KERN_CRIT "usb-host: request IO interface usb1 failed");
+      retval = -EBUSY;
+      goto out;
+    }
+    devdrv_info("Claimed interface for USB physical port 1\n");
+  }
+  if(port_in_use(1)) {
+    if (cris_request_io_interface(if_usb_2, "ETRAX100LX USB-HCD")) {
+      /* Free first interface if second failed to be claimed */
+      if(port_in_use(0)) {
+	cris_free_io_interface(if_usb_1);
+      }
+      printk(KERN_CRIT "usb-host: request IO interface usb2 failed");
+      retval = -EBUSY;
+      goto out;
+    }
+    devdrv_info("Claimed interface for USB physical port 2\n");
+  }
+  
+  /* Init transfer controller structs and locks */
+  if((retval = tc_init(hcd)) != 0) {
+    goto out;
+  }
+
+  /* Attach interrupt functions for DMA and init DMA controller */
+  if((retval = tc_dma_init(hcd)) != 0) {
+    goto out;
+  }
+
+  /* Attach the top IRQ handler for USB controller interrupts */
+  if (request_irq(ETRAX_USB_HC_IRQ, crisv10_hcd_top_irq, 0,
+		  "ETRAX 100LX built-in USB (HC)", hcd)) {
+    err("Could not allocate IRQ %d for USB", ETRAX_USB_HC_IRQ);
+    retval = -EBUSY;
+    goto out;
+  }
+
+  /* iso_eof is only enabled when isoc traffic is running. */
+  *R_USB_IRQ_MASK_SET =
+    /* IO_STATE(R_USB_IRQ_MASK_SET, iso_eof, set) | */
+    IO_STATE(R_USB_IRQ_MASK_SET, bulk_eot, set) |
+    IO_STATE(R_USB_IRQ_MASK_SET, epid_attn, set) |
+    IO_STATE(R_USB_IRQ_MASK_SET, port_status, set) |
+    IO_STATE(R_USB_IRQ_MASK_SET, ctl_status, set);
+
+
+  crisv10_ready_wait();
+  /* Reset the USB interface. */
+  *R_USB_COMMAND =
+    IO_STATE(R_USB_COMMAND, port_sel, nop) |
+    IO_STATE(R_USB_COMMAND, port_cmd, reset) |
+    IO_STATE(R_USB_COMMAND, ctrl_cmd, reset);
+
+  /* Designer's Reference, p. 8 - 10 says we should Initate R_USB_FM_PSTART to
+     0x2A30 (10800), to guarantee that control traffic gets 10% of the
+     bandwidth, and periodic transfer may allocate the rest (90%).
+     This doesn't work though.
+     The value 11960 is chosen to be just after the SOF token, with a couple
+     of bit times extra for possible bit stuffing. */
+  *R_USB_FM_PSTART = IO_FIELD(R_USB_FM_PSTART, value, 11960);
+
+  crisv10_ready_wait();
+  /* Configure the USB interface as a host controller. */
+  *R_USB_COMMAND =
+    IO_STATE(R_USB_COMMAND, port_sel, nop) |
+    IO_STATE(R_USB_COMMAND, port_cmd, reset) |
+    IO_STATE(R_USB_COMMAND, ctrl_cmd, host_config);
+
+
+  /* Check so controller not busy before enabling ports */
+  crisv10_ready_wait();
+
+  /* Enable selected USB ports */
+  if(port_in_use(0)) {
+    *R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, no);
+  } else {
+    *R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, yes);
+  }
+  if(port_in_use(1)) {
+    *R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, no);
+  } else {
+    *R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, yes);
+  }
+
+  crisv10_ready_wait();
+  /* Start processing of USB traffic. */
+  *R_USB_COMMAND =
+    IO_STATE(R_USB_COMMAND, port_sel, nop) |
+    IO_STATE(R_USB_COMMAND, port_cmd, reset) |
+    IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run);
+
+  /* Do not continue probing initialization before USB interface is done */
+  crisv10_ready_wait();
+
+  /* Register our Host Controller to USB Core
+   * Finish the remaining parts of generic HCD initialization: allocate the
+   * buffers of consistent memory, register the bus
+   * and call the driver's reset() and start() routines. */
+  retval = usb_add_hcd(hcd, ETRAX_USB_HC_IRQ, IRQF_DISABLED);
+  if (retval != 0) {
+    devdrv_err("Failed registering HCD driver\n");
+    goto out;
+  }
+
+  return 0;
+
+ out:
+  devdrv_hcd_remove(dev);
+  return retval;
+}
+
+
+/* cleanup after the host controller and driver */
+static int __init_or_module devdrv_hcd_remove(struct device *dev)
+{
+  struct crisv10_hcd *crisv10_hcd = dev_get_drvdata(dev);
+  struct usb_hcd *hcd;
+
+  if (!crisv10_hcd)
+    return 0;
+  hcd = crisv10_hcd_to_hcd(crisv10_hcd);
+
+
+  /* Stop USB Controller in Etrax 100LX */
+  crisv10_hcd_reset(hcd);
+
+  usb_remove_hcd(hcd);
+  devdrv_dbg("Removed HCD from USB Core\n");
+
+  /* Free USB Controller IRQ */
+  free_irq(ETRAX_USB_HC_IRQ, NULL);
+
+  /* Free resources */
+  tc_dma_destroy();
+  tc_destroy();
+
+
+  if(port_in_use(0)) {
+    cris_free_io_interface(if_usb_1);
+  }
+  if(port_in_use(1)) {
+    cris_free_io_interface(if_usb_2);
+  }
+
+  devdrv_dbg("Freed all claimed resources\n");
+
+  return 0;
+}
+
+
+#ifdef	CONFIG_PM
+
+static int devdrv_hcd_suspend(struct usb_hcd *hcd, u32 state, u32 level)
+{
+  return 0; /* no-op for now */
+}
+
+static int devdrv_hcd_resume(struct usb_hcd *hcd, u32 level)
+{
+  return 0; /* no-op for now */
+}
+
+#endif /* CONFIG_PM */
+
+
+
+/*************************************************************/
+/*************************************************************/
+/* Module block                                              */
+/*************************************************************/
+/*************************************************************/
+ 
+/* register driver */
+static int __init module_hcd_init(void) 
+{
+  
+  if (usb_disabled())
+    return -ENODEV;
+
+  /* Here we select enabled ports by following defines created from
+     menuconfig */
+#ifndef CONFIG_ETRAX_USB_HOST_PORT1
+  ports &= ~(1<<0);
+#endif
+#ifndef CONFIG_ETRAX_USB_HOST_PORT2
+  ports &= ~(1<<1);
+#endif
 
-			/* Now we are free to remove it and its SB descriptor.
-			   Note that it is assumed here that there is only one sb in the
-			   sb list for this ep. */
-			kmem_cache_free(usb_desc_cache, phys_to_virt(unlink_ep->sub));
-			kmem_cache_free(usb_desc_cache, (USB_EP_Desc_t *)unlink_ep);
-		}
+  printk(KERN_INFO "%s version "VERSION" "COPYRIGHT"\n", product_desc);
 
-		curr_ep = phys_to_virt(curr_ep->next);
+  devdrv_hc_platform_device =
+    platform_device_register_simple((char *) hc_name, 0, NULL, 0);
 
-	} while (curr_ep != first_ep);
-        urb->hcpriv = NULL;
+  if (IS_ERR(devdrv_hc_platform_device))
+    return PTR_ERR(devdrv_hc_platform_device);
+  return driver_register(&devdrv_hc_device_driver);
+  /* 
+   * Note that we do not set the DMA mask for the device,
+   * i.e. we pretend that we will use PIO, since no specific
+   * allocation routines are needed for DMA buffers. This will
+   * cause the HCD buffer allocation routines to fall back to
+   * kmalloc().
+   */
 }
 
-void etrax_usb_do_intr_recover(int epid)
-{
-	USB_EP_Desc_t *first_ep, *tmp_ep;
+/* unregister driver */
+static void __exit module_hcd_exit(void) 
+{	
+  driver_unregister(&devdrv_hc_device_driver);
+}
 
-	DBFENTER;
-
-	first_ep = (USB_EP_Desc_t *)phys_to_virt(*R_DMA_CH8_SUB2_EP);
-	tmp_ep = first_ep;
-
-	/* What this does is simply to walk the list of interrupt
-	   ep descriptors and enable those that are disabled. */
-
-	do {
-		if (IO_EXTRACT(USB_EP_command, epid, tmp_ep->command) == epid &&
-		    !(tmp_ep->command & IO_MASK(USB_EP_command, enable))) {
-			tmp_ep->command |= IO_STATE(USB_EP_command, enable, yes);
-		}
-
-		tmp_ep = (USB_EP_Desc_t *)phys_to_virt(tmp_ep->next);
-
-	} while (tmp_ep != first_ep);
-
-
-	DBFEXIT;
-}
-
-static int etrax_rh_unlink_urb (struct urb *urb)
-{
-	etrax_hc_t *hc;
-
-	DBFENTER;
-
-	hc = urb->dev->bus->hcpriv;
-
-	if (hc->rh.urb == urb) {
-		hc->rh.send = 0;
-		del_timer(&hc->rh.rh_int_timer);
-	}
-
-	DBFEXIT;
-	return 0;
-}
-
-static void etrax_rh_send_irq(struct urb *urb)
-{
-	__u16 data = 0;
-	etrax_hc_t *hc = urb->dev->bus->hcpriv;
-	DBFENTER;
-
-/*
-  dbg_rh("R_USB_FM_NUMBER   : 0x%08X", *R_USB_FM_NUMBER);
-  dbg_rh("R_USB_FM_REMAINING: 0x%08X", *R_USB_FM_REMAINING);
-*/
-
-	data |= (hc->rh.wPortChange_1) ? (1 << 1) : 0;
-	data |= (hc->rh.wPortChange_2) ? (1 << 2) : 0;
-
-	*((__u16 *)urb->transfer_buffer) = cpu_to_le16(data);
-	/* FIXME: Why is actual_length set to 1 when data is 2 bytes?
-	   Since only 1 byte is used, why not declare data as __u8? */
-	urb->actual_length = 1;
-	urb->status = 0;
-
-	if (hc->rh.send && urb->complete) {
-		dbg_rh("wPortChange_1: 0x%04X", hc->rh.wPortChange_1);
-		dbg_rh("wPortChange_2: 0x%04X", hc->rh.wPortChange_2);
-
-		urb->complete(urb, NULL);
-	}
-
-	DBFEXIT;
-}
-
-static void etrax_rh_init_int_timer(struct urb *urb)
-{
-	etrax_hc_t *hc;
-
-	DBFENTER;
-
-	hc = urb->dev->bus->hcpriv;
-	hc->rh.interval = urb->interval;
-	init_timer(&hc->rh.rh_int_timer);
-	hc->rh.rh_int_timer.function = etrax_rh_int_timer_do;
-	hc->rh.rh_int_timer.data = (unsigned long)urb;
-	/* FIXME: Is the jiffies resolution enough? All intervals < 10 ms will be mapped
-	   to 0, and the rest to the nearest lower 10 ms. */
-	hc->rh.rh_int_timer.expires = jiffies + ((HZ * hc->rh.interval) / 1000);
-	add_timer(&hc->rh.rh_int_timer);
-
-	DBFEXIT;
-}
-
-static void etrax_rh_int_timer_do(unsigned long ptr)
-{
-	struct urb *urb;
-	etrax_hc_t *hc;
-
-	DBFENTER;
-
-	urb = (struct urb*)ptr;
-	hc = urb->dev->bus->hcpriv;
-
-	if (hc->rh.send) {
-		etrax_rh_send_irq(urb);
-	}
-
-	DBFEXIT;
-}
-
-static int etrax_usb_setup_epid(struct urb *urb)
-{
-	int epid;
-	char devnum, endpoint, out_traffic, slow;
-	int maxlen;
-	unsigned long flags;
-
-	DBFENTER;
-
-	epid = etrax_usb_lookup_epid(urb);
-	if ((epid != -1)){
-		/* An epid that fits this urb has been found. */
-		DBFEXIT;
-		return epid;
-	}
-
-	/* We must find and initiate a new epid for this urb. */
-	epid = etrax_usb_allocate_epid();
-
-	if (epid == -1) {
-		/* Failed to allocate a new epid. */
-		DBFEXIT;
-		return epid;
-	}
-
-	/* We now have a new epid to use. Initiate it. */
-	set_bit(epid, (void *)&epid_usage_bitmask);
-
-	devnum = usb_pipedevice(urb->pipe);
-	endpoint = usb_pipeendpoint(urb->pipe);
-	slow = usb_pipeslow(urb->pipe);
-	maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
-	if (usb_pipetype(urb->pipe) == PIPE_CONTROL) {
-		/* We want both IN and OUT control traffic to be put on the same EP/SB list. */
-		out_traffic = 1;
-	} else {
-		out_traffic = usb_pipeout(urb->pipe);
-	}
-
-	save_flags(flags);
-	cli();
-
-	*R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
-	nop();
-
-	if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
-		*R_USB_EPT_DATA_ISO = IO_STATE(R_USB_EPT_DATA_ISO, valid, yes) |
-			/* FIXME: Change any to the actual port? */
-			IO_STATE(R_USB_EPT_DATA_ISO, port, any) |
-			IO_FIELD(R_USB_EPT_DATA_ISO, max_len, maxlen) |
-			IO_FIELD(R_USB_EPT_DATA_ISO, ep, endpoint) |
-			IO_FIELD(R_USB_EPT_DATA_ISO, dev, devnum);
-	} else {
-		*R_USB_EPT_DATA = IO_STATE(R_USB_EPT_DATA, valid, yes) |
-			IO_FIELD(R_USB_EPT_DATA, low_speed, slow) |
-			/* FIXME: Change any to the actual port? */
-			IO_STATE(R_USB_EPT_DATA, port, any) |
-			IO_FIELD(R_USB_EPT_DATA, max_len, maxlen) |
-			IO_FIELD(R_USB_EPT_DATA, ep, endpoint) |
-			IO_FIELD(R_USB_EPT_DATA, dev, devnum);
-	}
-
-	restore_flags(flags);
-
-	if (out_traffic) {
-		set_bit(epid, (void *)&epid_out_traffic);
-	} else {
-		clear_bit(epid, (void *)&epid_out_traffic);
-	}
-
-	dbg_epid("Setting up epid %d with devnum %d, endpoint %d and max_len %d (%s)",
-		 epid, devnum, endpoint, maxlen, out_traffic ? "OUT" : "IN");
-
-	DBFEXIT;
-	return epid;
-}
-
-static void etrax_usb_free_epid(int epid)
-{
-	unsigned long flags;
-
-	DBFENTER;
-
-	if (!test_bit(epid, (void *)&epid_usage_bitmask)) {
-		warn("Trying to free unused epid %d", epid);
-		DBFEXIT;
-		return;
-	}
-
-	save_flags(flags);
-	cli();
-
-	*R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
-	nop();
-	while (*R_USB_EPT_DATA & IO_MASK(R_USB_EPT_DATA, hold));
-	/* This will, among other things, set the valid field to 0. */
-	*R_USB_EPT_DATA = 0;
-	restore_flags(flags);
-
-	clear_bit(epid, (void *)&epid_usage_bitmask);
-
-
-	dbg_epid("Freed epid %d", epid);
-
-	DBFEXIT;
-}
-
-static int etrax_usb_lookup_epid(struct urb *urb)
-{
-	int i;
-	__u32 data;
-	char devnum, endpoint, slow, out_traffic;
-	int maxlen;
-	unsigned long flags;
-
-	DBFENTER;
-
-	devnum = usb_pipedevice(urb->pipe);
-	endpoint = usb_pipeendpoint(urb->pipe);
-	slow = usb_pipeslow(urb->pipe);
-	maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
-	if (usb_pipetype(urb->pipe) == PIPE_CONTROL) {
-		/* We want both IN and OUT control traffic to be put on the same EP/SB list. */
-		out_traffic = 1;
-	} else {
-		out_traffic = usb_pipeout(urb->pipe);
-	}
-
-	/* Step through att epids. */
-	for (i = 0; i < NBR_OF_EPIDS; i++) {
-		if (test_bit(i, (void *)&epid_usage_bitmask) &&
-		    test_bit(i, (void *)&epid_out_traffic) == out_traffic) {
-
-			save_flags(flags);
-			cli();
-			*R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, i);
-			nop();
-
-			if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
-				data = *R_USB_EPT_DATA_ISO;
-				restore_flags(flags);
-
-				if ((IO_MASK(R_USB_EPT_DATA_ISO, valid) & data) &&
-				    (IO_EXTRACT(R_USB_EPT_DATA_ISO, dev, data) == devnum) &&
-				    (IO_EXTRACT(R_USB_EPT_DATA_ISO, ep, data) == endpoint) &&
-				    (IO_EXTRACT(R_USB_EPT_DATA_ISO, max_len, data) == maxlen)) {
-					dbg_epid("Found epid %d for devnum %d, endpoint %d (%s)",
-						 i, devnum, endpoint, out_traffic ? "OUT" : "IN");
-					DBFEXIT;
-					return i;
-				}
-			} else {
-				data = *R_USB_EPT_DATA;
-				restore_flags(flags);
-
-				if ((IO_MASK(R_USB_EPT_DATA, valid) & data) &&
-				    (IO_EXTRACT(R_USB_EPT_DATA, dev, data) == devnum) &&
-				    (IO_EXTRACT(R_USB_EPT_DATA, ep, data) == endpoint) &&
-				    (IO_EXTRACT(R_USB_EPT_DATA, low_speed, data) == slow) &&
-				    (IO_EXTRACT(R_USB_EPT_DATA, max_len, data) == maxlen)) {
-					dbg_epid("Found epid %d for devnum %d, endpoint %d (%s)",
-						 i, devnum, endpoint, out_traffic ? "OUT" : "IN");
-					DBFEXIT;
-					return i;
-				}
-			}
-		}
-	}
-
-	DBFEXIT;
-	return -1;
-}
-
-static int etrax_usb_allocate_epid(void)
-{
-	int i;
-
-	DBFENTER;
-
-	for (i = 0; i < NBR_OF_EPIDS; i++) {
-		if (!test_bit(i, (void *)&epid_usage_bitmask)) {
-			dbg_epid("Found free epid %d", i);
-			DBFEXIT;
-			return i;
-		}
-	}
-
-	dbg_epid("Found no free epids");
-	DBFEXIT;
-	return -1;
-}
-
-static int etrax_usb_submit_urb(struct urb *urb, unsigned mem_flags)
-{
-	etrax_hc_t *hc;
-	int ret = -EINVAL;
-
-	DBFENTER;
-
-	if (!urb->dev || !urb->dev->bus) {
-		return -ENODEV;
-	}
-	if (usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)) <= 0) {
-		info("Submit urb to pipe with maxpacketlen 0, pipe 0x%X\n", urb->pipe);
-		return -EMSGSIZE;
-	}
-
-	if (urb->timeout) {
-		/* FIXME. */
-		warn("urb->timeout specified, ignoring.");
-	}
-
-	hc = (etrax_hc_t*)urb->dev->bus->hcpriv;
-
-	if (usb_pipedevice(urb->pipe) == hc->rh.devnum) {
-		/* This request is for the Virtual Root Hub. */
-		ret = etrax_rh_submit_urb(urb);
-
-	} else if (usb_pipetype(urb->pipe) == PIPE_BULK) {
-
-		ret = etrax_usb_submit_bulk_urb(urb);
-
-	} else if (usb_pipetype(urb->pipe) == PIPE_CONTROL) {
-
-		ret = etrax_usb_submit_ctrl_urb(urb);
-
-	} else if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT) {
-		int bustime;
-
-		if (urb->bandwidth == 0) {
-			bustime = usb_check_bandwidth(urb->dev, urb);
-			if (bustime < 0) {
-				ret = bustime;
-			} else {
-				ret = etrax_usb_submit_intr_urb(urb);
-				if (ret == 0)
-					usb_claim_bandwidth(urb->dev, urb, bustime, 0);
-			}
-		} else {
-			/* Bandwidth already set. */
-			ret = etrax_usb_submit_intr_urb(urb);
-		}
-
-	} else if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
-		int bustime;
-
-		if (urb->bandwidth == 0) {
-			bustime = usb_check_bandwidth(urb->dev, urb);
-			if (bustime < 0) {
-				ret = bustime;
-			} else {
-				ret = etrax_usb_submit_isoc_urb(urb);
-				if (ret == 0)
-					usb_claim_bandwidth(urb->dev, urb, bustime, 0);
-			}
-		} else {
-			/* Bandwidth already set. */
-			ret = etrax_usb_submit_isoc_urb(urb);
-		}
-	}
-
-	DBFEXIT;
-
-        if (ret != 0)
-          printk("Submit URB error %d\n", ret);
-
-	return ret;
-}
-
-static int etrax_usb_unlink_urb(struct urb *urb, int status)
-{
-	etrax_hc_t *hc;
-	etrax_urb_priv_t *urb_priv;
-	int epid;
-	unsigned int flags;
-
-	DBFENTER;
-
-	if (!urb) {
-		return -EINVAL;
-	}
-
-	/* Disable interrupts here since a descriptor interrupt for the isoc epid
-	   will modify the sb list.  This could possibly be done more granular, but
-	   unlink_urb should not be used frequently anyway.
-	*/
-
-	save_flags(flags);
-	cli();
-
-	if (!urb->dev || !urb->dev->bus) {
-		restore_flags(flags);
-		return -ENODEV;
-	}
-	if (!urb->hcpriv) {
-		/* This happens if a device driver calls unlink on an urb that
-		   was never submitted (lazy driver) or if the urb was completed
-		   while unlink was being called. */
-		restore_flags(flags);
-		return 0;
-	}
-	if (urb->transfer_flags & URB_ASYNC_UNLINK) {
-		/* FIXME. */
-		/* If URB_ASYNC_UNLINK is set:
-		   unlink
-		   move to a separate urb list
-		   call complete at next sof with ECONNRESET
-
-		   If not:
-		   wait 1 ms
-		   unlink
-		   call complete with ENOENT
-		*/
-		warn("URB_ASYNC_UNLINK set, ignoring.");
-	}
-
-	/* One might think that urb->status = -EINPROGRESS would be a requirement for unlinking,
-	   but that doesn't work for interrupt and isochronous traffic since they are completed
-	   repeatedly, and urb->status is set then. That may in itself be a bug though. */
-
-	hc = urb->dev->bus->hcpriv;
-	urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
-	epid = urb_priv->epid;
-
-	/* Set the urb status (synchronous unlink). */
-	urb->status = -ENOENT;
-	urb_priv->urb_state = UNLINK;
-
-	if (usb_pipedevice(urb->pipe) == hc->rh.devnum) {
-		int ret;
-		ret = etrax_rh_unlink_urb(urb);
-		DBFEXIT;
-		restore_flags(flags);
-		return ret;
-
-	} else if (usb_pipetype(urb->pipe) == PIPE_BULK) {
-
-		dbg_bulk("Unlink of bulk urb (0x%lx)", (unsigned long)urb);
-
-		if (TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
-			/* The EP was enabled, disable it and wait. */
-			TxBulkEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
-
-			/* Ah, the luxury of busy-wait. */
-			while (*R_DMA_CH8_SUB0_EP == virt_to_phys(&TxBulkEPList[epid]));
-		}
-		/* Kicking dummy list out of the party. */
-		TxBulkEPList[epid].next = virt_to_phys(&TxBulkEPList[(epid + 1) % NBR_OF_EPIDS]);
-
-	} else if (usb_pipetype(urb->pipe) == PIPE_CONTROL) {
-
-		dbg_ctrl("Unlink of ctrl urb (0x%lx)", (unsigned long)urb);
-
-		if (TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
-			/* The EP was enabled, disable it and wait. */
-			TxCtrlEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
-
-			/* Ah, the luxury of busy-wait. */
-			while (*R_DMA_CH8_SUB1_EP == virt_to_phys(&TxCtrlEPList[epid]));
-		}
-
-	} else if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT) {
-
-		dbg_intr("Unlink of intr urb (0x%lx)", (unsigned long)urb);
-
-		/* Separate function because it's a tad more complicated. */
-		etrax_usb_unlink_intr_urb(urb);
-
-	} else if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
-
-		dbg_isoc("Unlink of isoc urb (0x%lx)", (unsigned long)urb);
-
-		if (TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
-			/* The EP was enabled, disable it and wait. */
-			TxIsocEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
-
-			/* Ah, the luxury of busy-wait. */
-			while (*R_DMA_CH8_SUB3_EP == virt_to_phys(&TxIsocEPList[epid]));
-		}
-	}
-
-	/* Note that we need to remove the urb from the urb list *before* removing its SB
-	   descriptors. (This means that the isoc eof handler might get a null urb when we
-	   are unlinking the last urb.) */
-
-	if (usb_pipetype(urb->pipe) == PIPE_BULK) {
-
-		urb_list_del(urb, epid);
-		TxBulkEPList[epid].sub = 0;
-		etrax_remove_from_sb_list(urb);
-
-	} else if (usb_pipetype(urb->pipe) == PIPE_CONTROL) {
-
-		urb_list_del(urb, epid);
-		TxCtrlEPList[epid].sub = 0;
-		etrax_remove_from_sb_list(urb);
-
-	} else if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT) {
-
-		urb_list_del(urb, epid);
-		/* Sanity check (should never happen). */
-		assert(urb_list_empty(epid));
-
-		/* Release allocated bandwidth. */
-		usb_release_bandwidth(urb->dev, urb, 0);
-
-	} else if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
-
-		if (usb_pipeout(urb->pipe)) {
-
-			USB_SB_Desc_t *iter_sb, *prev_sb, *next_sb;
-
-			if (__urb_list_entry(urb, epid)) {
-
-				urb_list_del(urb, epid);
-				iter_sb = TxIsocEPList[epid].sub ? phys_to_virt(TxIsocEPList[epid].sub) : 0;
-				prev_sb = 0;
-				while (iter_sb && (iter_sb != urb_priv->first_sb)) {
-					prev_sb = iter_sb;
-					iter_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0;
-				}
-
-				if (iter_sb == 0) {
-					/* Unlink of the URB currently being transmitted. */
-					prev_sb = 0;
-					iter_sb = TxIsocEPList[epid].sub ? phys_to_virt(TxIsocEPList[epid].sub) : 0;
-				}
-
-				while (iter_sb && (iter_sb != urb_priv->last_sb)) {
-					iter_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0;
-				}
-				if (iter_sb) {
-					next_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0;
-				} else {
-					/* This should only happen if the DMA has completed
-					   processing the SB list for this EP while interrupts
-					   are disabled. */
-					dbg_isoc("Isoc urb not found, already sent?");
-					next_sb = 0;
-				}
-				if (prev_sb) {
-					prev_sb->next = next_sb ? virt_to_phys(next_sb) : 0;
-				} else {
-					TxIsocEPList[epid].sub = next_sb ? virt_to_phys(next_sb) : 0;
-				}
-
-				etrax_remove_from_sb_list(urb);
-				if (urb_list_empty(epid)) {
-					TxIsocEPList[epid].sub = 0;
-					dbg_isoc("Last isoc out urb epid %d", epid);
-				} else if (next_sb || prev_sb) {
-					dbg_isoc("Re-enable isoc out epid %d", epid);
-
-					TxIsocEPList[epid].hw_len = 0;
-					TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
-				} else {
-					TxIsocEPList[epid].sub = 0;
-					dbg_isoc("URB list non-empty and no SB list, EP disabled");
-				}
-			} else {
-				dbg_isoc("Urb 0x%p not found, completed already?", urb);
-			}
-		} else {
-
-			urb_list_del(urb, epid);
-
-			/* For in traffic there is only one SB descriptor for each EP even
-			   though there may be several urbs (all urbs point at the same SB). */
-			if (urb_list_empty(epid)) {
-				/* No more urbs, remove the SB. */
-				TxIsocEPList[epid].sub = 0;
-				etrax_remove_from_sb_list(urb);
-			} else {
-				TxIsocEPList[epid].hw_len = 0;
-				TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
-			}
-		}
-		/* Release allocated bandwidth. */
-		usb_release_bandwidth(urb->dev, urb, 1);
-	}
-	/* Free the epid if urb list is empty. */
-	if (urb_list_empty(epid)) {
-		etrax_usb_free_epid(epid);
-	}
-	restore_flags(flags);
-
-	/* Must be done before calling completion handler. */
-	kfree(urb_priv);
-	urb->hcpriv = 0;
-
-	if (urb->complete) {
-		urb->complete(urb, NULL);
-	}
-
-	DBFEXIT;
-	return 0;
-}
-
-static int etrax_usb_get_frame_number(struct usb_device *usb_dev)
-{
-	DBFENTER;
-	DBFEXIT;
-	return (*R_USB_FM_NUMBER & 0x7ff);
-}
-
-static irqreturn_t etrax_usb_tx_interrupt(int irq, void *vhc)
-{
-	DBFENTER;
-
-	/* This interrupt handler could be used when unlinking EP descriptors. */
-
-	if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub0_descr)) {
-		USB_EP_Desc_t *ep;
-
-		//dbg_bulk("dma8_sub0_descr (BULK) intr.");
-
-		/* It should be safe clearing the interrupt here, since we don't expect to get a new
-		   one until we restart the bulk channel. */
-		*R_DMA_CH8_SUB0_CLR_INTR = IO_STATE(R_DMA_CH8_SUB0_CLR_INTR, clr_descr, do);
-
-		/* Wait while the DMA is running (though we don't expect it to be). */
-		while (*R_DMA_CH8_SUB0_CMD & IO_MASK(R_DMA_CH8_SUB0_CMD, cmd));
-
-		/* Advance the DMA to the next EP descriptor. */
-		ep = (USB_EP_Desc_t *)phys_to_virt(*R_DMA_CH8_SUB0_EP);
-
-		//dbg_bulk("descr intr: DMA is at 0x%lx", (unsigned long)ep);
-
-		/* ep->next is already a physical address; no need for a virt_to_phys. */
-		*R_DMA_CH8_SUB0_EP = ep->next;
-
-		/* Start the DMA bulk channel again. */
-		*R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start);
-	}
-	if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub1_descr)) {
-		struct urb *urb;
-		int epid;
-		etrax_urb_priv_t *urb_priv;
-		unsigned long int flags;
-
-		dbg_ctrl("dma8_sub1_descr (CTRL) intr.");
-		*R_DMA_CH8_SUB1_CLR_INTR = IO_STATE(R_DMA_CH8_SUB1_CLR_INTR, clr_descr, do);
-
-		/* The complete callback gets called so we cli. */
-		save_flags(flags);
-		cli();
-
-		for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) {
-			if ((TxCtrlEPList[epid].sub == 0) ||
-			    (epid == DUMMY_EPID) ||
-			    (epid == INVALID_EPID)) {
-				/* Nothing here to see. */
-				continue;
-			}
-
-			/* Get the first urb (if any). */
-			urb = urb_list_first(epid);
-
-			if (urb) {
-
-				/* Sanity check. */
-				assert(usb_pipetype(urb->pipe) == PIPE_CONTROL);
-
-				urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
-				assert(urb_priv);
-
-				if (urb_priv->urb_state == WAITING_FOR_DESCR_INTR) {
-					assert(!(TxCtrlEPList[urb_priv->epid].command & IO_MASK(USB_EP_command, enable)));
-
-					etrax_usb_complete_urb(urb, 0);
-				}
-			}
-		}
-		restore_flags(flags);
-	}
-	if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub2_descr)) {
-		dbg_intr("dma8_sub2_descr (INTR) intr.");
-		*R_DMA_CH8_SUB2_CLR_INTR = IO_STATE(R_DMA_CH8_SUB2_CLR_INTR, clr_descr, do);
-	}
-	if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub3_descr)) {
-		struct urb *urb;
-		int epid;
-		int epid_done;
-		etrax_urb_priv_t *urb_priv;
-		USB_SB_Desc_t *sb_desc;
-
-		usb_isoc_complete_data_t *comp_data = NULL;
-
-		/* One or more isoc out transfers are done. */
-		dbg_isoc("dma8_sub3_descr (ISOC) intr.");
-
-		/* For each isoc out EP search for the first sb_desc with the intr flag
-		   set.  This descriptor must be the last packet from an URB.  Then
-		   traverse the URB list for the EP until the URB with urb_priv->last_sb
-		   matching the intr-marked sb_desc is found.  All URBs before this have
-		   been sent.
-		*/
-
-		for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) {
-			/* Skip past epids with no SB lists, epids used for in traffic,
-			   and special (dummy, invalid) epids. */
-			if ((TxIsocEPList[epid].sub == 0) ||
-			    (test_bit(epid, (void *)&epid_out_traffic) == 0) ||
-			    (epid == DUMMY_EPID) ||
-			    (epid == INVALID_EPID)) {
-				/* Nothing here to see. */
-				continue;
-			}
-			sb_desc = phys_to_virt(TxIsocEPList[epid].sub);
-
-			/* Find the last descriptor of the currently active URB for this ep.
-			   This is the first descriptor in the sub list marked for a descriptor
-			   interrupt. */
-			while (sb_desc && !IO_EXTRACT(USB_SB_command, intr, sb_desc->command)) {
-				sb_desc = sb_desc->next ? phys_to_virt(sb_desc->next) : 0;
-			}
-			assert(sb_desc);
-
-			dbg_isoc("Check epid %d, sub 0x%p, SB 0x%p",
-				 epid,
-				 phys_to_virt(TxIsocEPList[epid].sub),
-				 sb_desc);
-
-			epid_done = 0;
-
-			/* Get the first urb (if any). */
-			urb = urb_list_first(epid);
-			assert(urb);
-
-			while (urb && !epid_done) {
-
-				/* Sanity check. */
-				assert(usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS);
-
-				if (!usb_pipeout(urb->pipe)) {
-					/* descr interrupts are generated only for out pipes. */
-					epid_done = 1;
-					continue;
-				}
-
-				urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
-				assert(urb_priv);
-
-				if (sb_desc != urb_priv->last_sb) {
-
-					/* This urb has been sent. */
-					dbg_isoc("out URB 0x%p sent", urb);
-
-					urb_priv->urb_state = TRANSFER_DONE;
-
-				} else if ((sb_desc == urb_priv->last_sb) &&
-					   !(TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable))) {
-
-					assert((sb_desc->command & IO_MASK(USB_SB_command, eol)) == IO_STATE(USB_SB_command, eol, yes));
-					assert(sb_desc->next == 0);
-
-					dbg_isoc("out URB 0x%p last in list, epid disabled", urb);
-					TxIsocEPList[epid].sub = 0;
-					TxIsocEPList[epid].hw_len = 0;
-					urb_priv->urb_state = TRANSFER_DONE;
-
-					epid_done = 1;
-
-				} else {
-					epid_done = 1;
-				}
-				if (!epid_done) {
-					urb = urb_list_next(urb, epid);
-				}
-			}
-
-		}
-
-		*R_DMA_CH8_SUB3_CLR_INTR = IO_STATE(R_DMA_CH8_SUB3_CLR_INTR, clr_descr, do);
-
-		comp_data = (usb_isoc_complete_data_t*)kmem_cache_alloc(isoc_compl_cache, SLAB_ATOMIC);
-		assert(comp_data != NULL);
-
-                INIT_WORK(&comp_data->usb_bh, etrax_usb_isoc_descr_interrupt_bottom_half, comp_data);
-                schedule_work(&comp_data->usb_bh);
-	}
-
-	DBFEXIT;
-        return IRQ_HANDLED;
-}
-
-static void etrax_usb_isoc_descr_interrupt_bottom_half(void *data)
-{
-	usb_isoc_complete_data_t *comp_data = (usb_isoc_complete_data_t*)data;
-
-	struct urb *urb;
-	int epid;
-	int epid_done;
-	etrax_urb_priv_t *urb_priv;
-
-	DBFENTER;
-
-	dbg_isoc("dma8_sub3_descr (ISOC) bottom half.");
-
-	for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) {
-		unsigned long flags;
-
-		save_flags(flags);
-		cli();
-
-		epid_done = 0;
-
-		/* The descriptor interrupt handler has marked all transmitted isoch. out
-		   URBs with TRANSFER_DONE.  Now we traverse all epids and for all that
- 		   have isoch. out traffic traverse its URB list and complete the
-		   transmitted URB.
-		*/
-
-		while (!epid_done) {
-
-			/* Get the first urb (if any). */
-			urb = urb_list_first(epid);
-			if (urb == 0) {
-				epid_done = 1;
-				continue;
-			}
-
-			if (usb_pipetype(urb->pipe) != PIPE_ISOCHRONOUS) {
-					epid_done = 1;
-					continue;
-			}
-
-			if (!usb_pipeout(urb->pipe)) {
-				/* descr interrupts are generated only for out pipes. */
-				epid_done = 1;
-				continue;
-			}
-
-			dbg_isoc("Check epid %d, SB 0x%p", epid, (char*)TxIsocEPList[epid].sub);
-
-			urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
-			assert(urb_priv);
-
-			if (urb_priv->urb_state == TRANSFER_DONE) {
-				int i;
-				struct usb_iso_packet_descriptor *packet;
-
-				/* This urb has been sent. */
-				dbg_isoc("Completing isoc out URB 0x%p", urb);
-
-				for (i = 0; i < urb->number_of_packets; i++) {
-					packet = &urb->iso_frame_desc[i];
-					packet->status = 0;
-					packet->actual_length = packet->length;
-				}
-
-				etrax_usb_complete_isoc_urb(urb, 0);
-
-				if (urb_list_empty(epid)) {
-					etrax_usb_free_epid(epid);
-					epid_done = 1;
-				}
-			} else {
-				epid_done = 1;
-			}
-		}
-		restore_flags(flags);
-
-	}
-	kmem_cache_free(isoc_compl_cache, comp_data);
-
-	DBFEXIT;
-}
-
-
-
-static irqreturn_t etrax_usb_rx_interrupt(int irq, void *vhc)
-{
-	struct urb *urb;
-	etrax_urb_priv_t *urb_priv;
-	int epid = 0;
-	unsigned long flags;
-
-	/* Isoc diagnostics. */
-	static int curr_fm = 0;
-	static int prev_fm = 0;
-
-	DBFENTER;
-
-	/* Clear this interrupt. */
-	*R_DMA_CH9_CLR_INTR = IO_STATE(R_DMA_CH9_CLR_INTR, clr_eop, do);
-
-	/* Note that this while loop assumes that all packets span only
-	   one rx descriptor. */
-
-	/* The reason we cli here is that we call the driver's callback functions. */
-	save_flags(flags);
-	cli();
-
-	while (myNextRxDesc->status & IO_MASK(USB_IN_status, eop)) {
-
-		epid = IO_EXTRACT(USB_IN_status, epid, myNextRxDesc->status);
-		urb = urb_list_first(epid);
-
-		//printk("eop for epid %d, first urb 0x%lx\n", epid, (unsigned long)urb);
-
-		if (!urb) {
-			err("No urb for epid %d in rx interrupt", epid);
-			__dump_ept_data(epid);
-			goto skip_out;
-		}
-
-		/* Note that we cannot indescriminately assert(usb_pipein(urb->pipe)) since
-		   ctrl pipes are not. */
-
-		if (myNextRxDesc->status & IO_MASK(USB_IN_status, error)) {
-			__u32 r_usb_ept_data;
-			int no_error = 0;
-
-			assert(test_bit(epid, (void *)&epid_usage_bitmask));
-
-			*R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
-			nop();
-			if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
-				r_usb_ept_data = *R_USB_EPT_DATA_ISO;
-
-				if ((r_usb_ept_data & IO_MASK(R_USB_EPT_DATA_ISO, valid)) &&
-				    (IO_EXTRACT(R_USB_EPT_DATA_ISO, error_code, r_usb_ept_data) == 0) &&
-				    (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata))) {
-					/* Not an error, just a failure to receive an expected iso
-					   in packet in this frame.  This is not documented
-					   in the designers reference.
-					*/
-					no_error++;
-				} else {
-					warn("R_USB_EPT_DATA_ISO for epid %d = 0x%x", epid, r_usb_ept_data);
-				}
-			} else {
-				r_usb_ept_data = *R_USB_EPT_DATA;
-				warn("R_USB_EPT_DATA for epid %d = 0x%x", epid, r_usb_ept_data);
-			}
-
-			if (!no_error){
-				warn("error in rx desc->status, epid %d, first urb = 0x%lx",
-				     epid, (unsigned long)urb);
-				__dump_in_desc(myNextRxDesc);
-
-				warn("R_USB_STATUS = 0x%x", *R_USB_STATUS);
-
-				/* Check that ept was disabled when error occurred. */
-				switch (usb_pipetype(urb->pipe)) {
-				case PIPE_BULK:
-					assert(!(TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)));
-					break;
-				case PIPE_CONTROL:
-					assert(!(TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)));
-					break;
-				case PIPE_INTERRUPT:
-					assert(!(TxIntrEPList[epid].command & IO_MASK(USB_EP_command, enable)));
-					break;
-				case PIPE_ISOCHRONOUS:
-					assert(!(TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)));
-					break;
-				default:
-					warn("etrax_usb_rx_interrupt: bad pipetype %d in urb 0x%p",
-					     usb_pipetype(urb->pipe),
-					     urb);
-				}
-				etrax_usb_complete_urb(urb, -EPROTO);
-				goto skip_out;
-			}
-		}
-
-		urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
-		assert(urb_priv);
-
-		if ((usb_pipetype(urb->pipe) == PIPE_BULK) ||
-		    (usb_pipetype(urb->pipe) == PIPE_CONTROL) ||
-		    (usb_pipetype(urb->pipe) == PIPE_INTERRUPT)) {
-
-			if (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata)) {
-				/* We get nodata for empty data transactions, and the rx descriptor's
-				   hw_len field is not valid in that case. No data to copy in other
-				   words. */
-			} else {
-				/* Make sure the data fits in the buffer. */
-				assert(urb_priv->rx_offset + myNextRxDesc->hw_len
-				       <= urb->transfer_buffer_length);
-
-				memcpy(urb->transfer_buffer + urb_priv->rx_offset,
-				       phys_to_virt(myNextRxDesc->buf), myNextRxDesc->hw_len);
-				urb_priv->rx_offset += myNextRxDesc->hw_len;
-			}
-
-			if (myNextRxDesc->status & IO_MASK(USB_IN_status, eot)) {
-				if ((usb_pipetype(urb->pipe) == PIPE_CONTROL) &&
-				    ((TxCtrlEPList[urb_priv->epid].command & IO_MASK(USB_EP_command, enable)) ==
-				     IO_STATE(USB_EP_command, enable, yes))) {
-					/* The EP is still enabled, so the OUT packet used to ack
-					   the in data is probably not processed yet.  If the EP
-					   sub pointer has not moved beyond urb_priv->last_sb mark
-					   it for a descriptor interrupt and complete the urb in
-					   the descriptor interrupt handler.
-					*/
-					USB_SB_Desc_t *sub = TxCtrlEPList[urb_priv->epid].sub ? phys_to_virt(TxCtrlEPList[urb_priv->epid].sub) : 0;
-
-					while ((sub != NULL) && (sub != urb_priv->last_sb)) {
-						sub = sub->next ? phys_to_virt(sub->next) : 0;
-					}
-					if (sub != NULL) {
-						/* The urb has not been fully processed. */
-						urb_priv->urb_state = WAITING_FOR_DESCR_INTR;
-					} else {
-						warn("(CTRL) epid enabled and urb (0x%p) processed, ep->sub=0x%p", urb, (char*)TxCtrlEPList[urb_priv->epid].sub);
-						etrax_usb_complete_urb(urb, 0);
-					}
-				} else {
-					etrax_usb_complete_urb(urb, 0);
-				}
-			}
-
-		} else if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
-
-			struct usb_iso_packet_descriptor *packet;
-
-			if (urb_priv->urb_state == UNLINK) {
-				info("Ignoring rx data for urb being unlinked.");
-				goto skip_out;
-			} else if (urb_priv->urb_state == NOT_STARTED) {
-				info("What? Got rx data for urb that isn't started?");
-				goto skip_out;
-			}
-
-			packet = &urb->iso_frame_desc[urb_priv->isoc_packet_counter];
-			packet->status = 0;
-
-			if (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata)) {
-				/* We get nodata for empty data transactions, and the rx descriptor's
-				   hw_len field is not valid in that case. We copy 0 bytes however to
-				   stay in synch. */
-				packet->actual_length = 0;
-			} else {
-				packet->actual_length = myNextRxDesc->hw_len;
-				/* Make sure the data fits in the buffer. */
-				assert(packet->actual_length <= packet->length);
-				memcpy(urb->transfer_buffer + packet->offset,
-				       phys_to_virt(myNextRxDesc->buf), packet->actual_length);
-			}
-
-			/* Increment the packet counter. */
-			urb_priv->isoc_packet_counter++;
-
-			/* Note that we don't care about the eot field in the rx descriptor's status.
-			   It will always be set for isoc traffic. */
-			if (urb->number_of_packets == urb_priv->isoc_packet_counter) {
-
-				/* Out-of-synch diagnostics. */
-				curr_fm = (*R_USB_FM_NUMBER & 0x7ff);
-				if (((prev_fm + urb_priv->isoc_packet_counter) % (0x7ff + 1)) != curr_fm) {
-					/* This test is wrong, if there is more than one isoc
-					   in endpoint active it will always calculate wrong
-					   since prev_fm is shared by all endpoints.
-
-					   FIXME Make this check per URB using urb->start_frame.
-					*/
-					dbg_isoc("Out of synch? Previous frame = %d, current frame = %d",
-						 prev_fm, curr_fm);
-
-				}
-				prev_fm = curr_fm;
-
-				/* Complete the urb with status OK. */
-				etrax_usb_complete_isoc_urb(urb, 0);
-			}
-		}
-
-	skip_out:
-
-		/* DMA IN cache bug. Flush the DMA IN buffer from the cache. (struct etrax_dma_descr
-		   has the same layout as USB_IN_Desc for the relevant fields.) */
-		prepare_rx_descriptor((struct etrax_dma_descr*)myNextRxDesc);
-
-		myPrevRxDesc = myNextRxDesc;
-		myPrevRxDesc->command |= IO_MASK(USB_IN_command, eol);
-		myLastRxDesc->command &= ~IO_MASK(USB_IN_command, eol);
-		myLastRxDesc = myPrevRxDesc;
-
-		myNextRxDesc->status = 0;
-		myNextRxDesc = phys_to_virt(myNextRxDesc->next);
-	}
-
-	restore_flags(flags);
-
-	DBFEXIT;
-
-        return IRQ_HANDLED;
-}
-
-
-/* This function will unlink the SB descriptors associated with this urb. */
-static int etrax_remove_from_sb_list(struct urb *urb)
-{
-	USB_SB_Desc_t *next_sb, *first_sb, *last_sb;
-	etrax_urb_priv_t *urb_priv;
-	int i = 0;
-
-	DBFENTER;
-
-	urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
-	assert(urb_priv);
-
-	/* Just a sanity check. Since we don't fiddle with the DMA list the EP descriptor
-	   doesn't really need to be disabled, it's just that we expect it to be. */
-	if (usb_pipetype(urb->pipe) == PIPE_BULK) {
-		assert(!(TxBulkEPList[urb_priv->epid].command & IO_MASK(USB_EP_command, enable)));
-	} else if (usb_pipetype(urb->pipe) == PIPE_CONTROL) {
-		assert(!(TxCtrlEPList[urb_priv->epid].command & IO_MASK(USB_EP_command, enable)));
-	}
-
-	first_sb = urb_priv->first_sb;
-	last_sb = urb_priv->last_sb;
-
-	assert(first_sb);
-	assert(last_sb);
-
-	while (first_sb != last_sb) {
-		next_sb = (USB_SB_Desc_t *)phys_to_virt(first_sb->next);
-		kmem_cache_free(usb_desc_cache, first_sb);
-		first_sb = next_sb;
-		i++;
-	}
-	kmem_cache_free(usb_desc_cache, last_sb);
-	i++;
-	dbg_sb("%d SB descriptors freed", i);
-	/* Compare i with urb->number_of_packets for Isoc traffic.
-	   Should be same when calling unlink_urb */
-
-	DBFEXIT;
-
-	return i;
-}
-
-static int etrax_usb_submit_bulk_urb(struct urb *urb)
-{
-	int epid;
-	int empty;
-	unsigned long flags;
-	etrax_urb_priv_t *urb_priv;
-
-	DBFENTER;
-
-	/* Epid allocation, empty check and list add must be protected.
-	   Read about this in etrax_usb_submit_ctrl_urb. */
-
-	spin_lock_irqsave(&urb_list_lock, flags);
-	epid = etrax_usb_setup_epid(urb);
-	if (epid == -1) {
-		DBFEXIT;
-		spin_unlock_irqrestore(&urb_list_lock, flags);
-		return -ENOMEM;
-	}
-	empty = urb_list_empty(epid);
-	urb_list_add(urb, epid);
-	spin_unlock_irqrestore(&urb_list_lock, flags);
-
-	dbg_bulk("Adding bulk %s urb 0x%lx to %s list, epid %d",
-		 usb_pipein(urb->pipe) ? "IN" : "OUT", (unsigned long)urb, empty ? "empty" : "", epid);
-
-	/* Mark the urb as being in progress. */
-	urb->status = -EINPROGRESS;
-
-	/* Setup the hcpriv data. */
-	urb_priv = kzalloc(sizeof(etrax_urb_priv_t), KMALLOC_FLAG);
-	assert(urb_priv != NULL);
-	/* This sets rx_offset to 0. */
-	urb_priv->urb_state = NOT_STARTED;
-	urb->hcpriv = urb_priv;
-
-	if (empty) {
-		etrax_usb_add_to_bulk_sb_list(urb, epid);
-	}
-
-	DBFEXIT;
-
-	return 0;
-}
-
-static void etrax_usb_add_to_bulk_sb_list(struct urb *urb, int epid)
-{
-	USB_SB_Desc_t *sb_desc;
-	etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
-	unsigned long flags;
-	char maxlen;
-
-	DBFENTER;
-
-	dbg_bulk("etrax_usb_add_to_bulk_sb_list, urb 0x%lx", (unsigned long)urb);
-
-	maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
-
-	sb_desc = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_FLAG);
-	assert(sb_desc != NULL);
-	memset(sb_desc, 0, sizeof(USB_SB_Desc_t));
-
-
-	if (usb_pipeout(urb->pipe)) {
-
-		dbg_bulk("Grabbing bulk OUT, urb 0x%lx, epid %d", (unsigned long)urb, epid);
-
-		/* This is probably a sanity check of the bulk transaction length
-		   not being larger than 64 kB. */
-		if (urb->transfer_buffer_length > 0xffff) {
-			panic("urb->transfer_buffer_length > 0xffff");
-		}
-
-		sb_desc->sw_len = urb->transfer_buffer_length;
-
-		/* The rem field is don't care if it's not a full-length transfer, so setting
-		   it shouldn't hurt. Also, rem isn't used for OUT traffic. */
-		sb_desc->command = (IO_FIELD(USB_SB_command, rem, 0) |
-				    IO_STATE(USB_SB_command, tt, out) |
-				    IO_STATE(USB_SB_command, eot, yes) |
-				    IO_STATE(USB_SB_command, eol, yes));
-
-		/* The full field is set to yes, even if we don't actually check that this is
-		   a full-length transfer (i.e., that transfer_buffer_length % maxlen = 0).
-		   Setting full prevents the USB controller from sending an empty packet in
-		   that case.  However, if URB_ZERO_PACKET was set we want that. */
-		if (!(urb->transfer_flags & URB_ZERO_PACKET)) {
-			sb_desc->command |= IO_STATE(USB_SB_command, full, yes);
-		}
-
-		sb_desc->buf = virt_to_phys(urb->transfer_buffer);
-		sb_desc->next = 0;
-
-	} else if (usb_pipein(urb->pipe)) {
-
-		dbg_bulk("Grabbing bulk IN, urb 0x%lx, epid %d", (unsigned long)urb, epid);
-
-		sb_desc->sw_len = urb->transfer_buffer_length ?
-			(urb->transfer_buffer_length - 1) / maxlen + 1 : 0;
-
-		/* The rem field is don't care if it's not a full-length transfer, so setting
-		   it shouldn't hurt. */
-		sb_desc->command =
-			(IO_FIELD(USB_SB_command, rem,
-				  urb->transfer_buffer_length % maxlen) |
-			 IO_STATE(USB_SB_command, tt, in) |
-			 IO_STATE(USB_SB_command, eot, yes) |
-			 IO_STATE(USB_SB_command, eol, yes));
-
-		sb_desc->buf = 0;
-		sb_desc->next = 0;
-	}
-
-	urb_priv->first_sb = sb_desc;
-	urb_priv->last_sb = sb_desc;
-	urb_priv->epid = epid;
-
-	urb->hcpriv = urb_priv;
-
-	/* Reset toggle bits and reset error count. */
-	save_flags(flags);
-	cli();
-
-	*R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
-	nop();
-
-	/* FIXME: Is this a special case since the hold field is checked,
-	   or should we check hold in a lot of other cases as well? */
-	if (*R_USB_EPT_DATA & IO_MASK(R_USB_EPT_DATA, hold)) {
-		panic("Hold was set in %s", __FUNCTION__);
-	}
-
-	/* Reset error counters (regardless of which direction this traffic is). */
-	*R_USB_EPT_DATA &=
-		~(IO_MASK(R_USB_EPT_DATA, error_count_in) |
-		  IO_MASK(R_USB_EPT_DATA, error_count_out));
-
-	/* Software must preset the toggle bits. */
-	if (usb_pipeout(urb->pipe)) {
-		char toggle =
-			usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe));
-		*R_USB_EPT_DATA &= ~IO_MASK(R_USB_EPT_DATA, t_out);
-		*R_USB_EPT_DATA |= IO_FIELD(R_USB_EPT_DATA, t_out, toggle);
-	} else {
-		char toggle =
-			usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe));
-		*R_USB_EPT_DATA &= ~IO_MASK(R_USB_EPT_DATA, t_in);
-		*R_USB_EPT_DATA |= IO_FIELD(R_USB_EPT_DATA, t_in, toggle);
-	}
-
-	/* Assert that the EP descriptor is disabled. */
-	assert(!(TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)));
-
-	/* The reason we set the EP's sub pointer directly instead of
-	   walking the SB list and linking it last in the list is that we only
-	   have one active urb at a time (the rest are queued). */
-
-	/* Note that we cannot have interrupts running when we have set the SB descriptor
-	   but the EP is not yet enabled.  If a bulk eot happens for another EP, we will
-	   find this EP disabled and with a SB != 0, which will make us think that it's done. */
-	TxBulkEPList[epid].sub = virt_to_phys(sb_desc);
-	TxBulkEPList[epid].hw_len = 0;
-	/* Note that we don't have to fill in the ep_id field since this
-	   was done when we allocated the EP descriptors in init_tx_bulk_ep. */
-
-	/* Check if the dummy list is already with us (if several urbs were queued). */
-	if (TxBulkEPList[epid].next != virt_to_phys(&TxBulkDummyEPList[epid][0])) {
-
-		dbg_bulk("Inviting dummy list to the party for urb 0x%lx, epid %d",
-			 (unsigned long)urb, epid);
-
-		/* The last EP in the dummy list already has its next pointer set to
-		   TxBulkEPList[epid].next. */
-
-		/* We don't need to check if the DMA is at this EP or not before changing the
-		   next pointer, since we will do it in one 32-bit write (EP descriptors are
-		   32-bit aligned). */
-		TxBulkEPList[epid].next = virt_to_phys(&TxBulkDummyEPList[epid][0]);
-	}
-	/* Enable the EP descr. */
-	dbg_bulk("Enabling bulk EP for urb 0x%lx, epid %d", (unsigned long)urb, epid);
-	TxBulkEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
-
-	/* Everything is set up, safe to enable interrupts again. */
-	restore_flags(flags);
-
-	/* If the DMA bulk channel isn't running, we need to restart it if it
-	   has stopped at the last EP descriptor (DMA stopped because there was
-	   no more traffic) or if it has stopped at a dummy EP with the intr flag
-	   set (DMA stopped because we were too slow in inserting new traffic). */
-	if (!(*R_DMA_CH8_SUB0_CMD & IO_MASK(R_DMA_CH8_SUB0_CMD, cmd))) {
-
-		USB_EP_Desc_t *ep;
-		ep = (USB_EP_Desc_t *)phys_to_virt(*R_DMA_CH8_SUB0_EP);
-		dbg_bulk("DMA channel not running in add");
-		dbg_bulk("DMA is at 0x%lx", (unsigned long)ep);
-
-		if (*R_DMA_CH8_SUB0_EP == virt_to_phys(&TxBulkEPList[NBR_OF_EPIDS - 1]) ||
-		    (ep->command & 0x8) >> 3) {
-			*R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start);
-			/* Update/restart the bulk start timer since we just started the channel. */
-			mod_timer(&bulk_start_timer, jiffies + BULK_START_TIMER_INTERVAL);
-			/* Update/restart the bulk eot timer since we just inserted traffic. */
-			mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL);
-		}
-	}
-
-	DBFEXIT;
-}
-
-static void etrax_usb_complete_bulk_urb(struct urb *urb, int status)
-{
-	etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
-	int epid = urb_priv->epid;
-	unsigned long flags;
-
-	DBFENTER;
-
-	if (status)
-		warn("Completing bulk urb with status %d.", status);
-
-	dbg_bulk("Completing bulk urb 0x%lx for epid %d", (unsigned long)urb, epid);
-
-	/* Update the urb list. */
-	urb_list_del(urb, epid);
-
-	/* For an IN pipe, we always set the actual length, regardless of whether there was
-	   an error or not (which means the device driver can use the data if it wants to). */
-	if (usb_pipein(urb->pipe)) {
-		urb->actual_length = urb_priv->rx_offset;
-	} else {
-		/* Set actual_length for OUT urbs also; the USB mass storage driver seems
-		   to want that. We wouldn't know of any partial writes if there was an error. */
-		if (status == 0) {
-			urb->actual_length = urb->transfer_buffer_length;
-		} else {
-			urb->actual_length = 0;
-		}
-	}
-
-	/* FIXME: Is there something of the things below we shouldn't do if there was an error?
-	   Like, maybe we shouldn't toggle the toggle bits, or maybe we shouldn't insert more traffic. */
-
-	save_flags(flags);
-	cli();
-
-	*R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
-	nop();
-
-	/* We need to fiddle with the toggle bits because the hardware doesn't do it for us. */
-	if (usb_pipeout(urb->pipe)) {
-		char toggle =
-			IO_EXTRACT(R_USB_EPT_DATA, t_out, *R_USB_EPT_DATA);
-		usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
-			      usb_pipeout(urb->pipe), toggle);
-	} else {
-		char toggle =
-			IO_EXTRACT(R_USB_EPT_DATA, t_in, *R_USB_EPT_DATA);
-		usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
-			      usb_pipeout(urb->pipe), toggle);
-	}
-	restore_flags(flags);
-
-	/* Remember to free the SBs. */
-	etrax_remove_from_sb_list(urb);
-	kfree(urb_priv);
-	urb->hcpriv = 0;
-
-	/* If there are any more urb's in the list we'd better start sending */
-	if (!urb_list_empty(epid)) {
-
-		struct urb *new_urb;
-
-		/* Get the first urb. */
-		new_urb = urb_list_first(epid);
-		assert(new_urb);
-
-		dbg_bulk("More bulk for epid %d", epid);
-
-		etrax_usb_add_to_bulk_sb_list(new_urb, epid);
-	}
-
-	urb->status = status;
-
-	/* We let any non-zero status from the layer above have precedence. */
-	if (status == 0) {
-		/* URB_SHORT_NOT_OK means that short reads (shorter than the endpoint's max length)
-		   is to be treated as an error. */
-		if (urb->transfer_flags & URB_SHORT_NOT_OK) {
-			if (usb_pipein(urb->pipe) &&
-			    (urb->actual_length !=
-			     usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)))) {
-				urb->status = -EREMOTEIO;
-			}
-		}
-	}
-
-	if (urb->complete) {
-		urb->complete(urb, NULL);
-	}
-
-	if (urb_list_empty(epid)) {
-		/* This means that this EP is now free, deconfigure it. */
-		etrax_usb_free_epid(epid);
-
-		/* No more traffic; time to clean up.
-		   Must set sub pointer to 0, since we look at the sub pointer when handling
-		   the bulk eot interrupt. */
-
-		dbg_bulk("No bulk for epid %d", epid);
-
-		TxBulkEPList[epid].sub = 0;
-
-		/* Unlink the dummy list. */
-
-		dbg_bulk("Kicking dummy list out of party for urb 0x%lx, epid %d",
-			 (unsigned long)urb, epid);
-
-		/* No need to wait for the DMA before changing the next pointer.
-		   The modulo NBR_OF_EPIDS isn't actually necessary, since we will never use
-		   the last one (INVALID_EPID) for actual traffic. */
-		TxBulkEPList[epid].next =
-			virt_to_phys(&TxBulkEPList[(epid + 1) % NBR_OF_EPIDS]);
-	}
-
-	DBFEXIT;
-}
-
-static int etrax_usb_submit_ctrl_urb(struct urb *urb)
-{
-	int epid;
-	int empty;
-	unsigned long flags;
-	etrax_urb_priv_t *urb_priv;
-
-	DBFENTER;
-
-	/* FIXME: Return -ENXIO if there is already a queued urb for this endpoint? */
-
-	/* Epid allocation, empty check and list add must be protected.
-
-	   Epid allocation because if we find an existing epid for this endpoint an urb might be
-	   completed (emptying the list) before we add the new urb to the list, causing the epid
-	   to be de-allocated. We would then start the transfer with an invalid epid -> epid attn.
-
-	   Empty check and add because otherwise we might conclude that the list is not empty,
-	   after which it becomes empty before we add the new urb to the list, causing us not to
-	   insert the new traffic into the SB list. */
-
-	spin_lock_irqsave(&urb_list_lock, flags);
-	epid = etrax_usb_setup_epid(urb);
-	if (epid == -1) {
-		spin_unlock_irqrestore(&urb_list_lock, flags);
-		DBFEXIT;
-		return -ENOMEM;
-	}
-	empty = urb_list_empty(epid);
-	urb_list_add(urb, epid);
-	spin_unlock_irqrestore(&urb_list_lock, flags);
-
-	dbg_ctrl("Adding ctrl urb 0x%lx to %s list, epid %d",
-		 (unsigned long)urb, empty ? "empty" : "", epid);
-
-	/* Mark the urb as being in progress. */
-	urb->status = -EINPROGRESS;
-
-	/* Setup the hcpriv data. */
-	urb_priv = kzalloc(sizeof(etrax_urb_priv_t), KMALLOC_FLAG);
-	assert(urb_priv != NULL);
-	/* This sets rx_offset to 0. */
-	urb_priv->urb_state = NOT_STARTED;
-	urb->hcpriv = urb_priv;
-
-	if (empty) {
-		etrax_usb_add_to_ctrl_sb_list(urb, epid);
-	}
-
-	DBFEXIT;
-
-	return 0;
-}
-
-static void etrax_usb_add_to_ctrl_sb_list(struct urb *urb, int epid)
-{
-	USB_SB_Desc_t *sb_desc_setup;
-	USB_SB_Desc_t *sb_desc_data;
-	USB_SB_Desc_t *sb_desc_status;
-
-	etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
-
-	unsigned long flags;
-	char maxlen;
-
-	DBFENTER;
-
-	maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
-
-	sb_desc_setup = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_FLAG);
-	assert(sb_desc_setup != NULL);
-	sb_desc_status = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_FLAG);
-	assert(sb_desc_status != NULL);
-
-	/* Initialize the mandatory setup SB descriptor (used only in control transfers) */
-	sb_desc_setup->sw_len = 8;
-	sb_desc_setup->command = (IO_FIELD(USB_SB_command, rem, 0) |
-				  IO_STATE(USB_SB_command, tt, setup) |
-				  IO_STATE(USB_SB_command, full, yes) |
-				  IO_STATE(USB_SB_command, eot, yes));
-
-	sb_desc_setup->buf = virt_to_phys(urb->setup_packet);
-
-	if (usb_pipeout(urb->pipe)) {
-		dbg_ctrl("Transfer for epid %d is OUT", epid);
-
-		/* If this Control OUT transfer has an optional data stage we add an OUT token
-		   before the mandatory IN (status) token, hence the reordered SB list */
-
-		sb_desc_setup->next = virt_to_phys(sb_desc_status);
-		if (urb->transfer_buffer) {
-
-			dbg_ctrl("This OUT transfer has an extra data stage");
-
-			sb_desc_data = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_FLAG);
-			assert(sb_desc_data != NULL);
-
-			sb_desc_setup->next = virt_to_phys(sb_desc_data);
-
-			sb_desc_data->sw_len = urb->transfer_buffer_length;
-			sb_desc_data->command = (IO_STATE(USB_SB_command, tt, out) |
-						 IO_STATE(USB_SB_command, full, yes) |
-						 IO_STATE(USB_SB_command, eot, yes));
-			sb_desc_data->buf = virt_to_phys(urb->transfer_buffer);
-			sb_desc_data->next = virt_to_phys(sb_desc_status);
-		}
-
-		sb_desc_status->sw_len = 1;
-		sb_desc_status->command = (IO_FIELD(USB_SB_command, rem, 0) |
-					   IO_STATE(USB_SB_command, tt, in) |
-					   IO_STATE(USB_SB_command, eot, yes) |
-					   IO_STATE(USB_SB_command, intr, yes) |
-					   IO_STATE(USB_SB_command, eol, yes));
-
-		sb_desc_status->buf = 0;
-		sb_desc_status->next = 0;
-
-	} else if (usb_pipein(urb->pipe)) {
-
-		dbg_ctrl("Transfer for epid %d is IN", epid);
-		dbg_ctrl("transfer_buffer_length = %d", urb->transfer_buffer_length);
-		dbg_ctrl("rem is calculated to %d", urb->transfer_buffer_length % maxlen);
-
-		sb_desc_data = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_FLAG);
-		assert(sb_desc_data != NULL);
-
-		sb_desc_setup->next = virt_to_phys(sb_desc_data);
-
-		sb_desc_data->sw_len = urb->transfer_buffer_length ?
-			(urb->transfer_buffer_length - 1) / maxlen + 1 : 0;
-		dbg_ctrl("sw_len got %d", sb_desc_data->sw_len);
-
-		sb_desc_data->command =
-			(IO_FIELD(USB_SB_command, rem,
-				  urb->transfer_buffer_length % maxlen) |
-			 IO_STATE(USB_SB_command, tt, in) |
-			 IO_STATE(USB_SB_command, eot, yes));
-
-		sb_desc_data->buf = 0;
-		sb_desc_data->next = virt_to_phys(sb_desc_status);
-
-		/* Read comment at zout_buffer declaration for an explanation to this. */
-		sb_desc_status->sw_len = 1;
-		sb_desc_status->command = (IO_FIELD(USB_SB_command, rem, 0) |
-					   IO_STATE(USB_SB_command, tt, zout) |
-					   IO_STATE(USB_SB_command, full, yes) |
-					   IO_STATE(USB_SB_command, eot, yes) |
-					   IO_STATE(USB_SB_command, intr, yes) |
-					   IO_STATE(USB_SB_command, eol, yes));
-
-		sb_desc_status->buf = virt_to_phys(&zout_buffer[0]);
-		sb_desc_status->next = 0;
-	}
-
-	urb_priv->first_sb = sb_desc_setup;
-	urb_priv->last_sb = sb_desc_status;
-	urb_priv->epid = epid;
-
-	urb_priv->urb_state = STARTED;
-
-	/* Reset toggle bits and reset error count, remember to di and ei */
-	/* Warning: it is possible that this locking doesn't work with bottom-halves */
-
-	save_flags(flags);
-	cli();
-
-	*R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
-	nop();
-	if (*R_USB_EPT_DATA & IO_MASK(R_USB_EPT_DATA, hold)) {
-		panic("Hold was set in %s", __FUNCTION__);
-	}
-
-
-	/* FIXME: Compare with etrax_usb_add_to_bulk_sb_list where the toggle bits
-	   are set to a specific value. Why the difference? Read "Transfer and Toggle Bits
-	   in Designer's Reference, p. 8 - 11. */
-	*R_USB_EPT_DATA &=
-		~(IO_MASK(R_USB_EPT_DATA, error_count_in) |
-		  IO_MASK(R_USB_EPT_DATA, error_count_out) |
-		  IO_MASK(R_USB_EPT_DATA, t_in) |
-		  IO_MASK(R_USB_EPT_DATA, t_out));
-
-	/* Since we use the rx interrupt to complete ctrl urbs, we can enable interrupts now
-	   (i.e. we don't check the sub pointer on an eot interrupt like we do for bulk traffic). */
-	restore_flags(flags);
-
-	/* Assert that the EP descriptor is disabled. */
-	assert(!(TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)));
-
-	/* Set up and enable the EP descriptor. */
-	TxCtrlEPList[epid].sub = virt_to_phys(sb_desc_setup);
-	TxCtrlEPList[epid].hw_len = 0;
-	TxCtrlEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
-
-	/* We start the DMA sub channel without checking if it's running or not, because:
-	   1) If it's already running, issuing the start command is a nop.
-	   2) We avoid a test-and-set race condition. */
-	*R_DMA_CH8_SUB1_CMD = IO_STATE(R_DMA_CH8_SUB1_CMD, cmd, start);
-
-	DBFEXIT;
-}
-
-static void etrax_usb_complete_ctrl_urb(struct urb *urb, int status)
-{
-	etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
-	int epid = urb_priv->epid;
-
-	DBFENTER;
-
-	if (status)
-		warn("Completing ctrl urb with status %d.", status);
-
-	dbg_ctrl("Completing ctrl epid %d, urb 0x%lx", epid, (unsigned long)urb);
-
-	/* Remove this urb from the list. */
-	urb_list_del(urb, epid);
-
-	/* For an IN pipe, we always set the actual length, regardless of whether there was
-	   an error or not (which means the device driver can use the data if it wants to). */
-	if (usb_pipein(urb->pipe)) {
-		urb->actual_length = urb_priv->rx_offset;
-	}
-
-	/* FIXME: Is there something of the things below we shouldn't do if there was an error?
-	   Like, maybe we shouldn't insert more traffic. */
-
-	/* Remember to free the SBs. */
-	etrax_remove_from_sb_list(urb);
-	kfree(urb_priv);
-	urb->hcpriv = 0;
-
-	/* If there are any more urbs in the list we'd better start sending. */
-	if (!urb_list_empty(epid)) {
-		struct urb *new_urb;
-
-		/* Get the first urb. */
-		new_urb = urb_list_first(epid);
-		assert(new_urb);
-
-		dbg_ctrl("More ctrl for epid %d, first urb = 0x%lx", epid, (unsigned long)new_urb);
-
-		etrax_usb_add_to_ctrl_sb_list(new_urb, epid);
-	}
-
-	urb->status = status;
-
-	/* We let any non-zero status from the layer above have precedence. */
-	if (status == 0) {
-		/* URB_SHORT_NOT_OK means that short reads (shorter than the endpoint's max length)
-		   is to be treated as an error. */
-		if (urb->transfer_flags & URB_SHORT_NOT_OK) {
-			if (usb_pipein(urb->pipe) &&
-			    (urb->actual_length !=
-			     usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)))) {
-				urb->status = -EREMOTEIO;
-			}
-		}
-	}
-
-	if (urb->complete) {
-		urb->complete(urb, NULL);
-	}
-
-	if (urb_list_empty(epid)) {
-		/* No more traffic. Time to clean up. */
-		etrax_usb_free_epid(epid);
-		/* Must set sub pointer to 0. */
-		dbg_ctrl("No ctrl for epid %d", epid);
-		TxCtrlEPList[epid].sub = 0;
-	}
-
-	DBFEXIT;
-}
-
-static int etrax_usb_submit_intr_urb(struct urb *urb)
-{
-
-	int epid;
-
-	DBFENTER;
-
-	if (usb_pipeout(urb->pipe)) {
-		/* Unsupported transfer type.
-		   We don't support interrupt out traffic. (If we do, we can't support
-		   intervals for neither in or out traffic, but are forced to schedule all
-		   interrupt traffic in one frame.) */
-		return -EINVAL;
-	}
-
-	epid = etrax_usb_setup_epid(urb);
-	if (epid == -1) {
-		DBFEXIT;
-		return -ENOMEM;
-	}
-
-	if (!urb_list_empty(epid)) {
-		/* There is already a queued urb for this endpoint. */
-		etrax_usb_free_epid(epid);
-		return -ENXIO;
-	}
-
-	urb->status = -EINPROGRESS;
-
-	dbg_intr("Add intr urb 0x%lx, to list, epid %d", (unsigned long)urb, epid);
-
-	urb_list_add(urb, epid);
-	etrax_usb_add_to_intr_sb_list(urb, epid);
-
-	return 0;
-
-	DBFEXIT;
-}
-
-static void etrax_usb_add_to_intr_sb_list(struct urb *urb, int epid)
-{
-
-	volatile USB_EP_Desc_t *tmp_ep;
-	volatile USB_EP_Desc_t *first_ep;
-
-	char maxlen;
-	int interval;
-	int i;
-
-	etrax_urb_priv_t *urb_priv;
-
-	DBFENTER;
-
-	maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
-	interval = urb->interval;
-
-	urb_priv = kzalloc(sizeof(etrax_urb_priv_t), KMALLOC_FLAG);
-	assert(urb_priv != NULL);
-	urb->hcpriv = urb_priv;
-
-	first_ep = &TxIntrEPList[0];
-
-	/* Round of the interval to 2^n, it is obvious that this code favours
-	   smaller numbers, but that is actually a good thing */
-	/* FIXME: The "rounding error" for larger intervals will be quite
-	   large. For in traffic this shouldn't be a problem since it will only
-	   mean that we "poll" more often. */
-	for (i = 0; interval; i++) {
-		interval = interval >> 1;
-	}
-	interval = 1 << (i - 1);
-
-	dbg_intr("Interval rounded to %d", interval);
-
-	tmp_ep = first_ep;
-	i = 0;
-	do {
-		if (tmp_ep->command & IO_MASK(USB_EP_command, eof)) {
-			if ((i % interval) == 0) {
-				/* Insert the traffic ep after tmp_ep */
-				USB_EP_Desc_t *ep_desc;
-				USB_SB_Desc_t *sb_desc;
-
-				dbg_intr("Inserting EP for epid %d", epid);
-
-				ep_desc = (USB_EP_Desc_t *)
-					kmem_cache_alloc(usb_desc_cache, SLAB_FLAG);
-				sb_desc = (USB_SB_Desc_t *)
-					kmem_cache_alloc(usb_desc_cache, SLAB_FLAG);
-				assert(ep_desc != NULL);
-				CHECK_ALIGN(ep_desc);
-				assert(sb_desc != NULL);
-
-				ep_desc->sub = virt_to_phys(sb_desc);
-				ep_desc->hw_len = 0;
-				ep_desc->command = (IO_FIELD(USB_EP_command, epid, epid) |
-						    IO_STATE(USB_EP_command, enable, yes));
-
-
-				/* Round upwards the number of packets of size maxlen
-				   that this SB descriptor should receive. */
-				sb_desc->sw_len = urb->transfer_buffer_length ?
-					(urb->transfer_buffer_length - 1) / maxlen + 1 : 0;
-				sb_desc->next = 0;
-				sb_desc->buf = 0;
-				sb_desc->command =
-					(IO_FIELD(USB_SB_command, rem, urb->transfer_buffer_length % maxlen) |
-					 IO_STATE(USB_SB_command, tt, in) |
-					 IO_STATE(USB_SB_command, eot, yes) |
-					 IO_STATE(USB_SB_command, eol, yes));
-
-				ep_desc->next = tmp_ep->next;
-				tmp_ep->next = virt_to_phys(ep_desc);
-			}
-			i++;
-		}
-		tmp_ep = (USB_EP_Desc_t *)phys_to_virt(tmp_ep->next);
-	} while (tmp_ep != first_ep);
-
-
-	/* Note that first_sb/last_sb doesn't apply to interrupt traffic. */
-	urb_priv->epid = epid;
-
-	/* We start the DMA sub channel without checking if it's running or not, because:
-	   1) If it's already running, issuing the start command is a nop.
-	   2) We avoid a test-and-set race condition. */
-	*R_DMA_CH8_SUB2_CMD = IO_STATE(R_DMA_CH8_SUB2_CMD, cmd, start);
-
-	DBFEXIT;
-}
-
-
-
-static void etrax_usb_complete_intr_urb(struct urb *urb, int status)
-{
-	etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
-	int epid = urb_priv->epid;
-
-	DBFENTER;
-
-	if (status)
-		warn("Completing intr urb with status %d.", status);
-
-	dbg_intr("Completing intr epid %d, urb 0x%lx", epid, (unsigned long)urb);
-
-	urb->status = status;
-	urb->actual_length = urb_priv->rx_offset;
-
-	dbg_intr("interrupt urb->actual_length = %d", urb->actual_length);
-
-	/* We let any non-zero status from the layer above have precedence. */
-	if (status == 0) {
-		/* URB_SHORT_NOT_OK means that short reads (shorter than the endpoint's max length)
-		   is to be treated as an error. */
-		if (urb->transfer_flags & URB_SHORT_NOT_OK) {
-			if (urb->actual_length !=
-			    usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe))) {
-				urb->status = -EREMOTEIO;
-			}
-		}
-	}
-
-	/* The driver will resubmit the URB so we need to remove it first */
-        etrax_usb_unlink_urb(urb, 0);
-	if (urb->complete) {
-		urb->complete(urb, NULL);
-	}
-
-	DBFEXIT;
-}
-
-
-static int etrax_usb_submit_isoc_urb(struct urb *urb)
-{
-	int epid;
-	unsigned long flags;
-
-	DBFENTER;
-
-	dbg_isoc("Submitting isoc urb = 0x%lx", (unsigned long)urb);
-
-	/* Epid allocation, empty check and list add must be protected.
-	   Read about this in etrax_usb_submit_ctrl_urb. */
-
-	spin_lock_irqsave(&urb_list_lock, flags);
-	/* Is there an active epid for this urb ? */
-	epid = etrax_usb_setup_epid(urb);
-	if (epid == -1) {
-		DBFEXIT;
-		spin_unlock_irqrestore(&urb_list_lock, flags);
-		return -ENOMEM;
-	}
-
-	/* Ok, now we got valid endpoint, lets insert some traffic */
-
-	urb->status = -EINPROGRESS;
-
-	/* Find the last urb in the URB_List and add this urb after that one.
-	   Also add the traffic, that is do an etrax_usb_add_to_isoc_sb_list.  This
-	   is important to make this in "real time" since isochronous traffic is
-	   time sensitive. */
-
-	dbg_isoc("Adding isoc urb to (possibly empty) list");
-	urb_list_add(urb, epid);
-	etrax_usb_add_to_isoc_sb_list(urb, epid);
-	spin_unlock_irqrestore(&urb_list_lock, flags);
-
-	DBFEXIT;
-
-	return 0;
-}
-
-static void etrax_usb_check_error_isoc_ep(const int epid)
-{
-	unsigned long int flags;
-	int error_code;
-	__u32 r_usb_ept_data;
-
-	/* We can't read R_USB_EPID_ATTN here since it would clear the iso_eof,
-	   bulk_eot and epid_attn interrupts.  So we just check the status of
-	   the epid without testing if for it in R_USB_EPID_ATTN. */
-
-
-	save_flags(flags);
-	cli();
-	*R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
-	nop();
-	/* Note that although there are separate R_USB_EPT_DATA and R_USB_EPT_DATA_ISO
-	   registers, they are located at the same address and are of the same size.
-	   In other words, this read should be ok for isoc also. */
-	r_usb_ept_data = *R_USB_EPT_DATA;
-	restore_flags(flags);
-
-	error_code = IO_EXTRACT(R_USB_EPT_DATA_ISO, error_code, r_usb_ept_data);
-
-	if (r_usb_ept_data & IO_MASK(R_USB_EPT_DATA, hold)) {
-		warn("Hold was set for epid %d.", epid);
-		return;
-	}
-
-	if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA_ISO, error_code, no_error)) {
-
-		/* This indicates that the SB list of the ept was completed before
-		   new data was appended to it.  This is not an error, but indicates
-		   large system or USB load and could possibly cause trouble for
-		   very timing sensitive USB device drivers so we log it.
-		*/
-		info("Isoc. epid %d disabled with no error", epid);
-		return;
-
-	} else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA_ISO, error_code, stall)) {
-		/* Not really a protocol error, just says that the endpoint gave
-		   a stall response. Note that error_code cannot be stall for isoc. */
-		panic("Isoc traffic cannot stall");
-
-	} else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA_ISO, error_code, bus_error)) {
-		/* Two devices responded to a transaction request. Must be resolved
-		   by software. FIXME: Reset ports? */
-		panic("Bus error for epid %d."
-		      " Two devices responded to transaction request",
-		      epid);
-
-	} else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, buffer_error)) {
-		/* DMA overrun or underrun. */
-		warn("Buffer overrun/underrun for epid %d. DMA too busy?", epid);
-
-		/* It seems that error_code = buffer_error in
-		   R_USB_EPT_DATA/R_USB_EPT_DATA_ISO and ourun = yes in R_USB_STATUS
-		   are the same error. */
-	}
-}
-
-
-static void etrax_usb_add_to_isoc_sb_list(struct urb *urb, int epid)
-{
-
-	int i = 0;
-
-	etrax_urb_priv_t *urb_priv;
-	USB_SB_Desc_t *prev_sb_desc,  *next_sb_desc, *temp_sb_desc;
-
-	DBFENTER;
-
-	prev_sb_desc = next_sb_desc = temp_sb_desc = NULL;
-
-	urb_priv = kzalloc(sizeof(etrax_urb_priv_t), GFP_ATOMIC);
-	assert(urb_priv != NULL);
-
-	urb->hcpriv = urb_priv;
-	urb_priv->epid = epid;
-
-	if (usb_pipeout(urb->pipe)) {
-
-		if (urb->number_of_packets == 0) panic("etrax_usb_add_to_isoc_sb_list 0 packets\n");
-
-		dbg_isoc("Transfer for epid %d is OUT", epid);
-		dbg_isoc("%d packets in URB", urb->number_of_packets);
-
-		/* Create one SB descriptor for each packet and link them together. */
-		for (i = 0; i < urb->number_of_packets; i++) {
-			if (!urb->iso_frame_desc[i].length)
-				continue;
-
-			next_sb_desc = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_ATOMIC);
-			assert(next_sb_desc != NULL);
-
-			if (urb->iso_frame_desc[i].length > 0) {
-
-				next_sb_desc->command = (IO_STATE(USB_SB_command, tt, out) |
-							 IO_STATE(USB_SB_command, eot, yes));
-
-				next_sb_desc->sw_len = urb->iso_frame_desc[i].length;
-				next_sb_desc->buf = virt_to_phys((char*)urb->transfer_buffer + urb->iso_frame_desc[i].offset);
-
-				/* Check if full length transfer. */
-				if (urb->iso_frame_desc[i].length ==
-				    usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe))) {
-					next_sb_desc->command |= IO_STATE(USB_SB_command, full, yes);
-				}
-			} else {
-				dbg_isoc("zero len packet");
-				next_sb_desc->command = (IO_FIELD(USB_SB_command, rem, 0) |
-							 IO_STATE(USB_SB_command, tt, zout) |
-							 IO_STATE(USB_SB_command, eot, yes) |
-							 IO_STATE(USB_SB_command, full, yes));
-
-				next_sb_desc->sw_len = 1;
-				next_sb_desc->buf = virt_to_phys(&zout_buffer[0]);
-			}
-
-			/* First SB descriptor that belongs to this urb */
-			if (i == 0)
-				urb_priv->first_sb = next_sb_desc;
-			else
-				prev_sb_desc->next = virt_to_phys(next_sb_desc);
-
-			prev_sb_desc = next_sb_desc;
-		}
-
-		next_sb_desc->command |= (IO_STATE(USB_SB_command, intr, yes) |
-					  IO_STATE(USB_SB_command, eol, yes));
-		next_sb_desc->next = 0;
-		urb_priv->last_sb = next_sb_desc;
-
-	} else if (usb_pipein(urb->pipe)) {
-
-		dbg_isoc("Transfer for epid %d is IN", epid);
-		dbg_isoc("transfer_buffer_length = %d", urb->transfer_buffer_length);
-		dbg_isoc("rem is calculated to %d", urb->iso_frame_desc[urb->number_of_packets - 1].length);
-
-		/* Note that in descriptors for periodic traffic are not consumed. This means that
-		   the USB controller never propagates in the SB list. In other words, if there already
-		   is an SB descriptor in the list for this EP we don't have to do anything. */
-		if (TxIsocEPList[epid].sub == 0) {
-			dbg_isoc("Isoc traffic not already running, allocating SB");
-
-			next_sb_desc = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_ATOMIC);
-			assert(next_sb_desc != NULL);
-
-			next_sb_desc->command = (IO_STATE(USB_SB_command, tt, in) |
-						 IO_STATE(USB_SB_command, eot, yes) |
-						 IO_STATE(USB_SB_command, eol, yes));
-
-			next_sb_desc->next = 0;
-			next_sb_desc->sw_len = 1; /* Actual number of packets is not relevant
-						     for periodic in traffic as long as it is more
-						     than zero.  Set to 1 always. */
-			next_sb_desc->buf = 0;
-
-			/* The rem field is don't care for isoc traffic, so we don't set it. */
-
-			/* Only one SB descriptor that belongs to this urb. */
-			urb_priv->first_sb = next_sb_desc;
-			urb_priv->last_sb = next_sb_desc;
-
-		} else {
-
-			dbg_isoc("Isoc traffic already running, just setting first/last_sb");
-
-			/* Each EP for isoc in will have only one SB descriptor, setup when submitting the
-			   already active urb. Note that even though we may have several first_sb/last_sb
-			   pointing at the same SB descriptor, they are freed only once (when the list has
-			   become empty). */
-			urb_priv->first_sb = phys_to_virt(TxIsocEPList[epid].sub);
-			urb_priv->last_sb = phys_to_virt(TxIsocEPList[epid].sub);
-			return;
-		}
-
-	}
-
-	/* Find the spot to insert this urb and add it. */
-	if (TxIsocEPList[epid].sub == 0) {
-		/* First SB descriptor inserted in this list (in or out). */
-		dbg_isoc("Inserting SB desc first in list");
-		TxIsocEPList[epid].hw_len = 0;
-		TxIsocEPList[epid].sub = virt_to_phys(urb_priv->first_sb);
-
-	} else {
-		/* Isochronous traffic is already running, insert new traffic last (only out). */
-		dbg_isoc("Inserting SB desc last in list");
-		temp_sb_desc = phys_to_virt(TxIsocEPList[epid].sub);
-		while ((temp_sb_desc->command & IO_MASK(USB_SB_command, eol)) !=
-		       IO_STATE(USB_SB_command, eol, yes)) {
-			assert(temp_sb_desc->next);
-			temp_sb_desc = phys_to_virt(temp_sb_desc->next);
-		}
-		dbg_isoc("Appending list on desc 0x%p", temp_sb_desc);
-
-		/* Next pointer must be set before eol is removed. */
-		temp_sb_desc->next = virt_to_phys(urb_priv->first_sb);
-		/* Clear the previous end of list flag since there is a new in the
-		   added SB descriptor list. */
-		temp_sb_desc->command &= ~IO_MASK(USB_SB_command, eol);
-
-		if (!(TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable))) {
-			/* 8.8.5 in Designer's Reference says we should check for and correct
-			   any errors in the EP here.  That should not be necessary if epid_attn
-			   is handled correctly, so we assume all is ok. */
-			dbg_isoc("EP disabled");
-			etrax_usb_check_error_isoc_ep(epid);
-
-			/* The SB list was exhausted. */
-			if (virt_to_phys(urb_priv->last_sb) != TxIsocEPList[epid].sub) {
-				/* The new sublist did not get processed before the EP was
-				   disabled.  Setup the EP again. */
-				dbg_isoc("Set EP sub to new list");
-				TxIsocEPList[epid].hw_len = 0;
-				TxIsocEPList[epid].sub = virt_to_phys(urb_priv->first_sb);
-			}
-		}
-	}
-
-	if (urb->transfer_flags & URB_ISO_ASAP) {
-		/* The isoc transfer should be started as soon as possible. The start_frame
-		   field is a return value if URB_ISO_ASAP was set. Comparing R_USB_FM_NUMBER
-		   with a USB Chief trace shows that the first isoc IN token is sent 2 frames
-		   later. I'm not sure how this affects usage of the start_frame field by the
-		   device driver, or how it affects things when USB_ISO_ASAP is not set, so
-		   therefore there's no compensation for the 2 frame "lag" here. */
-		urb->start_frame = (*R_USB_FM_NUMBER & 0x7ff);
-		TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
-		urb_priv->urb_state = STARTED;
-		dbg_isoc("URB_ISO_ASAP set, urb->start_frame set to %d", urb->start_frame);
-	} else {
-		/* Not started yet. */
-		urb_priv->urb_state = NOT_STARTED;
-		dbg_isoc("urb_priv->urb_state set to NOT_STARTED");
-	}
-
-       /* We start the DMA sub channel without checking if it's running or not, because:
-	  1) If it's already running, issuing the start command is a nop.
-	  2) We avoid a test-and-set race condition. */
-	*R_DMA_CH8_SUB3_CMD = IO_STATE(R_DMA_CH8_SUB3_CMD, cmd, start);
-
-	DBFEXIT;
-}
-
-static void etrax_usb_complete_isoc_urb(struct urb *urb, int status)
-{
-	etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
-	int epid = urb_priv->epid;
-	int auto_resubmit = 0;
-
-	DBFENTER;
-	dbg_isoc("complete urb 0x%p, status %d", urb, status);
-
-	if (status)
-		warn("Completing isoc urb with status %d.", status);
-
-	if (usb_pipein(urb->pipe)) {
-		int i;
-
-		/* Make that all isoc packets have status and length set before
-		   completing the urb. */
-		for (i = urb_priv->isoc_packet_counter; i < urb->number_of_packets; i++) {
-			urb->iso_frame_desc[i].actual_length = 0;
-			urb->iso_frame_desc[i].status = -EPROTO;
-		}
-
-		urb_list_del(urb, epid);
-
-		if (!list_empty(&urb_list[epid])) {
-			((etrax_urb_priv_t *)(urb_list_first(epid)->hcpriv))->urb_state = STARTED;
-		} else {
-			unsigned long int flags;
-			if (TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
-				/* The EP was enabled, disable it and wait. */
-				TxIsocEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
-
-				/* Ah, the luxury of busy-wait. */
-				while (*R_DMA_CH8_SUB3_EP == virt_to_phys(&TxIsocEPList[epid]));
-			}
-
-			etrax_remove_from_sb_list(urb);
-			TxIsocEPList[epid].sub = 0;
-			TxIsocEPList[epid].hw_len = 0;
-
-			save_flags(flags);
-			cli();
-			etrax_usb_free_epid(epid);
-			restore_flags(flags);
-		}
-
-		urb->hcpriv = 0;
-		kfree(urb_priv);
-
-		/* Release allocated bandwidth. */
-		usb_release_bandwidth(urb->dev, urb, 0);
-	} else if (usb_pipeout(urb->pipe)) {
-		int freed_descr;
-
-		dbg_isoc("Isoc out urb complete 0x%p", urb);
-
-		/* Update the urb list. */
-		urb_list_del(urb, epid);
-
-		freed_descr = etrax_remove_from_sb_list(urb);
-		dbg_isoc("freed %d descriptors of %d packets", freed_descr, urb->number_of_packets);
-		assert(freed_descr == urb->number_of_packets);
-		urb->hcpriv = 0;
-		kfree(urb_priv);
-
-		/* Release allocated bandwidth. */
-		usb_release_bandwidth(urb->dev, urb, 0);
-	}
-
-	urb->status = status;
-	if (urb->complete) {
-		urb->complete(urb, NULL);
-	}
-
-	if (auto_resubmit) {
-		/* Check that urb was not unlinked by the complete callback. */
-		if (__urb_list_entry(urb, epid)) {
-			/* Move this one down the list. */
-			urb_list_move_last(urb, epid);
-
-			/* Mark the now first urb as started (may already be). */
-			((etrax_urb_priv_t *)(urb_list_first(epid)->hcpriv))->urb_state = STARTED;
-
-			/* Must set this to 0 since this urb is still active after
-			   completion. */
-			urb_priv->isoc_packet_counter = 0;
-		} else {
-			warn("(ISOC) automatic resubmit urb 0x%p removed by complete.", urb);
-		}
-	}
-
-	DBFEXIT;
-}
-
-static void etrax_usb_complete_urb(struct urb *urb, int status)
-{
-	switch (usb_pipetype(urb->pipe)) {
-	case PIPE_BULK:
-		etrax_usb_complete_bulk_urb(urb, status);
-		break;
-	case PIPE_CONTROL:
-		etrax_usb_complete_ctrl_urb(urb, status);
-		break;
-	case PIPE_INTERRUPT:
-		etrax_usb_complete_intr_urb(urb, status);
-		break;
-	case PIPE_ISOCHRONOUS:
-		etrax_usb_complete_isoc_urb(urb, status);
-		break;
-	default:
-		err("Unknown pipetype");
-	}
-}
-
-
-
-static irqreturn_t etrax_usb_hc_interrupt_top_half(int irq, void *vhc)
-{
-	usb_interrupt_registers_t *reg;
-	unsigned long flags;
-	__u32 irq_mask;
-	__u8 status;
-	__u32 epid_attn;
-	__u16 port_status_1;
-	__u16 port_status_2;
-	__u32 fm_number;
-
-	DBFENTER;
-
-	/* Read critical registers into local variables, do kmalloc afterwards. */
-	save_flags(flags);
-	cli();
-
-	irq_mask = *R_USB_IRQ_MASK_READ;
-	/* Reading R_USB_STATUS clears the ctl_status interrupt. Note that R_USB_STATUS
-	   must be read before R_USB_EPID_ATTN since reading the latter clears the
-	   ourun and perror fields of R_USB_STATUS. */
-	status = *R_USB_STATUS;
-
-	/* Reading R_USB_EPID_ATTN clears the iso_eof, bulk_eot and epid_attn interrupts. */
-	epid_attn = *R_USB_EPID_ATTN;
-
-	/* Reading R_USB_RH_PORT_STATUS_1 and R_USB_RH_PORT_STATUS_2 clears the
-	   port_status interrupt. */
-	port_status_1 = *R_USB_RH_PORT_STATUS_1;
-	port_status_2 = *R_USB_RH_PORT_STATUS_2;
-
-	/* Reading R_USB_FM_NUMBER clears the sof interrupt. */
-	/* Note: the lower 11 bits contain the actual frame number, sent with each sof. */
-	fm_number = *R_USB_FM_NUMBER;
-
-	restore_flags(flags);
-
-	reg = (usb_interrupt_registers_t *)kmem_cache_alloc(top_half_reg_cache, SLAB_ATOMIC);
-
-	assert(reg != NULL);
-
-	reg->hc = (etrax_hc_t *)vhc;
-
-	/* Now put register values into kmalloc'd area. */
-	reg->r_usb_irq_mask_read = irq_mask;
-	reg->r_usb_status = status;
-	reg->r_usb_epid_attn = epid_attn;
-	reg->r_usb_rh_port_status_1 = port_status_1;
-	reg->r_usb_rh_port_status_2 = port_status_2;
-	reg->r_usb_fm_number = fm_number;
-
-        INIT_WORK(&reg->usb_bh, etrax_usb_hc_interrupt_bottom_half, reg);
-        schedule_work(&reg->usb_bh);
-
-	DBFEXIT;
-
-        return IRQ_HANDLED;
-}
-
-static void etrax_usb_hc_interrupt_bottom_half(void *data)
-{
-	usb_interrupt_registers_t *reg = (usb_interrupt_registers_t *)data;
-	__u32 irq_mask = reg->r_usb_irq_mask_read;
-
-	DBFENTER;
-
-	/* Interrupts are handled in order of priority. */
-	if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, epid_attn)) {
-		etrax_usb_hc_epid_attn_interrupt(reg);
-	}
-	if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, port_status)) {
-		etrax_usb_hc_port_status_interrupt(reg);
-	}
-	if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, ctl_status)) {
-		etrax_usb_hc_ctl_status_interrupt(reg);
-	}
-	if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, iso_eof)) {
-		etrax_usb_hc_isoc_eof_interrupt();
-	}
-	if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, bulk_eot)) {
-		/* Update/restart the bulk start timer since obviously the channel is running. */
-		mod_timer(&bulk_start_timer, jiffies + BULK_START_TIMER_INTERVAL);
-		/* Update/restart the bulk eot timer since we just received an bulk eot interrupt. */
-		mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL);
-
-		etrax_usb_hc_bulk_eot_interrupt(0);
-	}
-
-	kmem_cache_free(top_half_reg_cache, reg);
-
-	DBFEXIT;
-}
-
-
-void etrax_usb_hc_isoc_eof_interrupt(void)
-{
-	struct urb *urb;
-	etrax_urb_priv_t *urb_priv;
-	int epid;
-	unsigned long flags;
-
-	DBFENTER;
-
-	/* Do not check the invalid epid (it has a valid sub pointer). */
-	for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) {
-
-		/* Do not check the invalid epid (it has a valid sub pointer). */
-		if ((epid == DUMMY_EPID) || (epid == INVALID_EPID))
-			continue;
-
-		/* Disable interrupts to block the isoc out descriptor interrupt handler
-		   from being called while the isoc EPID list is being checked.
-		*/
-		save_flags(flags);
-		cli();
-
-		if (TxIsocEPList[epid].sub == 0) {
-			/* Nothing here to see. */
-			restore_flags(flags);
-			continue;
-		}
-
-		/* Get the first urb (if any). */
-		urb = urb_list_first(epid);
-		if (urb == 0) {
-			warn("Ignoring NULL urb");
-			restore_flags(flags);
-			continue;
-		}
-		if (usb_pipein(urb->pipe)) {
-
-			/* Sanity check. */
-			assert(usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS);
-
-			urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
-			assert(urb_priv);
-
-			if (urb_priv->urb_state == NOT_STARTED) {
-
-				/* If ASAP is not set and urb->start_frame is the current frame,
-				   start the transfer. */
-				if (!(urb->transfer_flags & URB_ISO_ASAP) &&
-				    (urb->start_frame == (*R_USB_FM_NUMBER & 0x7ff))) {
-
-					dbg_isoc("Enabling isoc IN EP descr for epid %d", epid);
-					TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
-
-					/* This urb is now active. */
-					urb_priv->urb_state = STARTED;
-					continue;
-				}
-			}
-		}
-		restore_flags(flags);
-	}
-
-	DBFEXIT;
-
-}
-
-void etrax_usb_hc_bulk_eot_interrupt(int timer_induced)
-{
- 	int epid;
-
-	/* The technique is to run one urb at a time, wait for the eot interrupt at which
-	   point the EP descriptor has been disabled. */
-
-	DBFENTER;
-	dbg_bulk("bulk eot%s", timer_induced ? ", called by timer" : "");
-
-	for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
-
-		if (!(TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) &&
-		    (TxBulkEPList[epid].sub != 0)) {
-
-			struct urb *urb;
-			etrax_urb_priv_t *urb_priv;
-			unsigned long flags;
-			__u32 r_usb_ept_data;
-
-			/* Found a disabled EP descriptor which has a non-null sub pointer.
-			   Verify that this ctrl EP descriptor got disabled no errors.
-			   FIXME: Necessary to check error_code? */
-			dbg_bulk("for epid %d?", epid);
-
-			/* Get the first urb. */
-			urb = urb_list_first(epid);
-
-			/* FIXME: Could this happen for valid reasons? Why did it disappear? Because of
-			   wrong unlinking? */
-			if (!urb) {
-				warn("NULL urb for epid %d", epid);
-				continue;
-			}
-
-			assert(urb);
-			urb_priv = (etrax_urb_priv_t *)urb->hcpriv;
-			assert(urb_priv);
-
-			/* Sanity checks. */
-			assert(usb_pipetype(urb->pipe) == PIPE_BULK);
-			if (phys_to_virt(TxBulkEPList[epid].sub) != urb_priv->last_sb) {
-				err("bulk endpoint got disabled before reaching last sb");
-			}
-
-			/* For bulk IN traffic, there seems to be a race condition between
-			   between the bulk eot and eop interrupts, or rather an uncertainty regarding
-			   the order in which they happen. Normally we expect the eop interrupt from
-			   DMA channel 9 to happen before the eot interrupt.
-
-			   Therefore, we complete the bulk IN urb in the rx interrupt handler instead. */
-
-			if (usb_pipein(urb->pipe)) {
-				dbg_bulk("in urb, continuing");
-				continue;
-			}
-
-			save_flags(flags);
-			cli();
-			*R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
-			nop();
-			r_usb_ept_data = *R_USB_EPT_DATA;
-			restore_flags(flags);
-
-			if (IO_EXTRACT(R_USB_EPT_DATA, error_code, r_usb_ept_data) ==
-			    IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) {
-				/* This means that the endpoint has no error, is disabled
-				   and had inserted traffic, i.e. transfer successfully completed. */
-				etrax_usb_complete_bulk_urb(urb, 0);
-			} else {
-				/* Shouldn't happen. We expect errors to be caught by epid attention. */
-				err("Found disabled bulk EP desc, error_code != no_error");
-			}
-		}
-	}
-
-	/* Normally, we should find (at least) one disabled EP descriptor with a valid sub pointer.
-	   However, because of the uncertainty in the deliverance of the eop/eot interrupts, we may
-	   not.  Also, we might find two disabled EPs when handling an eot interrupt, and then find
-	   none the next time. */
-
-	DBFEXIT;
-
-}
-
-void etrax_usb_hc_epid_attn_interrupt(usb_interrupt_registers_t *reg)
-{
-	/* This function handles the epid attention interrupt.  There are a variety of reasons
-	   for this interrupt to happen (Designer's Reference, p. 8 - 22 for the details):
-
-	   invalid ep_id  - Invalid epid in an EP (EP disabled).
-	   stall	  - Not strictly an error condition (EP disabled).
-	   3rd error      - Three successive transaction errors  (EP disabled).
-	   buffer ourun   - Buffer overrun or underrun (EP disabled).
-	   past eof1      - Intr or isoc transaction proceeds past EOF1.
-	   near eof       - Intr or isoc transaction would not fit inside the frame.
-	   zout transfer  - If zout transfer for a bulk endpoint (EP disabled).
-	   setup transfer - If setup transfer for a non-ctrl endpoint (EP disabled). */
-
-	int epid;
-
-
-	DBFENTER;
-
-	assert(reg != NULL);
-
-	/* Note that we loop through all epids. We still want to catch errors for
-	   the invalid one, even though we might handle them differently. */
-	for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
-
-		if (test_bit(epid, (void *)&reg->r_usb_epid_attn)) {
-
-			struct urb *urb;
-			__u32 r_usb_ept_data;
-			unsigned long flags;
-			int error_code;
-
-			save_flags(flags);
-			cli();
-			*R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
-			nop();
-			/* Note that although there are separate R_USB_EPT_DATA and R_USB_EPT_DATA_ISO
-			   registers, they are located at the same address and are of the same size.
-			   In other words, this read should be ok for isoc also. */
-			r_usb_ept_data = *R_USB_EPT_DATA;
-			restore_flags(flags);
-
-			/* First some sanity checks. */
-			if (epid == INVALID_EPID) {
-				/* FIXME: What if it became disabled? Could seriously hurt interrupt
-				   traffic. (Use do_intr_recover.) */
-				warn("Got epid_attn for INVALID_EPID (%d).", epid);
-				err("R_USB_EPT_DATA = 0x%x", r_usb_ept_data);
-				err("R_USB_STATUS = 0x%x", reg->r_usb_status);
-				continue;
-			} else 	if (epid == DUMMY_EPID) {
-				/* We definitely don't care about these ones. Besides, they are
-				   always disabled, so any possible disabling caused by the
-				   epid attention interrupt is irrelevant. */
-				warn("Got epid_attn for DUMMY_EPID (%d).", epid);
-				continue;
-			}
-
-			/* Get the first urb in the urb list for this epid. We blatantly assume
-			   that only the first urb could have caused the epid attention.
-			   (For bulk and ctrl, only one urb is active at any one time. For intr
-			   and isoc we remove them once they are completed.) */
-			urb = urb_list_first(epid);
-
-			if (urb == NULL) {
-				err("Got epid_attn for epid %i with no urb.", epid);
-				err("R_USB_EPT_DATA = 0x%x", r_usb_ept_data);
-				err("R_USB_STATUS = 0x%x", reg->r_usb_status);
-				continue;
-			}
-
-			switch (usb_pipetype(urb->pipe)) {
-			case PIPE_BULK:
-				warn("Got epid attn for bulk endpoint, epid %d", epid);
-				break;
-			case PIPE_CONTROL:
-				warn("Got epid attn for control endpoint, epid %d", epid);
-				break;
-			case PIPE_INTERRUPT:
-				warn("Got epid attn for interrupt endpoint, epid %d", epid);
-				break;
-			case PIPE_ISOCHRONOUS:
-				warn("Got epid attn for isochronous endpoint, epid %d", epid);
-				break;
-			}
-
-			if (usb_pipetype(urb->pipe) != PIPE_ISOCHRONOUS) {
-				if (r_usb_ept_data & IO_MASK(R_USB_EPT_DATA, hold)) {
-					warn("Hold was set for epid %d.", epid);
-					continue;
-				}
-			}
-
-			/* Even though error_code occupies bits 22 - 23 in both R_USB_EPT_DATA and
-			   R_USB_EPT_DATA_ISOC, we separate them here so we don't forget in other places. */
-			if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
-				error_code = IO_EXTRACT(R_USB_EPT_DATA_ISO, error_code, r_usb_ept_data);
-			} else {
-				error_code = IO_EXTRACT(R_USB_EPT_DATA, error_code, r_usb_ept_data);
-			}
-
-			/* Using IO_STATE_VALUE on R_USB_EPT_DATA should be ok for isoc also. */
-			if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) {
-
-				/* Isoc traffic doesn't have error_count_in/error_count_out. */
-				if ((usb_pipetype(urb->pipe) != PIPE_ISOCHRONOUS) &&
-				    (IO_EXTRACT(R_USB_EPT_DATA, error_count_in, r_usb_ept_data) == 3 ||
-				     IO_EXTRACT(R_USB_EPT_DATA, error_count_out, r_usb_ept_data) == 3)) {
-					/* 3rd error. */
-					warn("3rd error for epid %i", epid);
-					etrax_usb_complete_urb(urb, -EPROTO);
-
-				} else if (reg->r_usb_status & IO_MASK(R_USB_STATUS, perror)) {
-
-					warn("Perror for epid %d", epid);
-
-					if (!(r_usb_ept_data & IO_MASK(R_USB_EPT_DATA, valid))) {
-						/* invalid ep_id */
-						panic("Perror because of invalid epid."
-						      " Deconfigured too early?");
-					} else {
-						/* past eof1, near eof, zout transfer, setup transfer */
-
-						/* Dump the urb and the relevant EP descriptor list. */
-
-						__dump_urb(urb);
-						__dump_ept_data(epid);
-						__dump_ep_list(usb_pipetype(urb->pipe));
-
-						panic("Something wrong with DMA descriptor contents."
-						      " Too much traffic inserted?");
-					}
-				} else if (reg->r_usb_status & IO_MASK(R_USB_STATUS, ourun)) {
-					/* buffer ourun */
-					panic("Buffer overrun/underrun for epid %d. DMA too busy?", epid);
-				}
-
-			} else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, stall)) {
-				/* Not really a protocol error, just says that the endpoint gave
-				   a stall response. Note that error_code cannot be stall for isoc. */
-				if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
-					panic("Isoc traffic cannot stall");
-				}
-
-				warn("Stall for epid %d", epid);
-				etrax_usb_complete_urb(urb, -EPIPE);
-
-			} else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, bus_error)) {
-				/* Two devices responded to a transaction request. Must be resolved
-				   by software. FIXME: Reset ports? */
-				panic("Bus error for epid %d."
-				      " Two devices responded to transaction request",
-				      epid);
-
-			} else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, buffer_error)) {
-				/* DMA overrun or underrun. */
-				warn("Buffer overrun/underrun for epid %d. DMA too busy?", epid);
-
-				/* It seems that error_code = buffer_error in
-				   R_USB_EPT_DATA/R_USB_EPT_DATA_ISO and ourun = yes in R_USB_STATUS
-				   are the same error. */
-				etrax_usb_complete_urb(urb, -EPROTO);
-			}
-		}
-	}
-
-	DBFEXIT;
-
-}
-
-void etrax_usb_bulk_start_timer_func(unsigned long dummy)
-{
-
-	/* We might enable an EP descriptor behind the current DMA position when it's about
-	   to decide that there are no more bulk traffic and it should stop the bulk channel.
-	   Therefore we periodically check if the bulk channel is stopped and there is an
-	   enabled bulk EP descriptor, in which case we start the bulk channel. */
-	dbg_bulk("bulk_start_timer timed out.");
-
-	if (!(*R_DMA_CH8_SUB0_CMD & IO_MASK(R_DMA_CH8_SUB0_CMD, cmd))) {
-		int epid;
-
-		dbg_bulk("Bulk DMA channel not running.");
-
-		for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
-			if (TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
-				dbg_bulk("Found enabled EP for epid %d, starting bulk channel.\n",
-					 epid);
-				*R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start);
-
-				/* Restart the bulk eot timer since we just started the bulk channel. */
-				mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL);
-
-				/* No need to search any further. */
-				break;
-			}
-		}
-	} else {
-		dbg_bulk("Bulk DMA channel running.");
-	}
-}
-
-void etrax_usb_hc_port_status_interrupt(usb_interrupt_registers_t *reg)
-{
-	etrax_hc_t *hc = reg->hc;
-	__u16 r_usb_rh_port_status_1 = reg->r_usb_rh_port_status_1;
-	__u16 r_usb_rh_port_status_2 = reg->r_usb_rh_port_status_2;
-
-	DBFENTER;
-
-	/* The Etrax RH does not include a wPortChange register, so this has to be handled in software
-	   (by saving the old port status value for comparison when the port status interrupt happens).
-	   See section 11.16.2.6.2 in the USB 1.1 spec for details. */
-
-	dbg_rh("hc->rh.prev_wPortStatus_1 = 0x%x", hc->rh.prev_wPortStatus_1);
-	dbg_rh("hc->rh.prev_wPortStatus_2 = 0x%x", hc->rh.prev_wPortStatus_2);
-	dbg_rh("r_usb_rh_port_status_1 = 0x%x", r_usb_rh_port_status_1);
-	dbg_rh("r_usb_rh_port_status_2 = 0x%x", r_usb_rh_port_status_2);
-
-	/* C_PORT_CONNECTION is set on any transition. */
-	hc->rh.wPortChange_1 |=
-		((r_usb_rh_port_status_1 & (1 << RH_PORT_CONNECTION)) !=
-		 (hc->rh.prev_wPortStatus_1 & (1 << RH_PORT_CONNECTION))) ?
-		(1 << RH_PORT_CONNECTION) : 0;
-
-	hc->rh.wPortChange_2 |=
-		((r_usb_rh_port_status_2 & (1 << RH_PORT_CONNECTION)) !=
-		 (hc->rh.prev_wPortStatus_2 & (1 << RH_PORT_CONNECTION))) ?
-		(1 << RH_PORT_CONNECTION) : 0;
-
-	/* C_PORT_ENABLE is _only_ set on a one to zero transition, i.e. when
-	   the port is disabled, not when it's enabled. */
-	hc->rh.wPortChange_1 |=
-		((hc->rh.prev_wPortStatus_1 & (1 << RH_PORT_ENABLE))
-		 && !(r_usb_rh_port_status_1 & (1 << RH_PORT_ENABLE))) ?
-		(1 << RH_PORT_ENABLE) : 0;
-
-	hc->rh.wPortChange_2 |=
-		((hc->rh.prev_wPortStatus_2 & (1 << RH_PORT_ENABLE))
-		 && !(r_usb_rh_port_status_2 & (1 << RH_PORT_ENABLE))) ?
-		(1 << RH_PORT_ENABLE) : 0;
-
-	/* C_PORT_SUSPEND is set to one when the device has transitioned out
-	   of the suspended state, i.e. when suspend goes from one to zero. */
-	hc->rh.wPortChange_1 |=
-		((hc->rh.prev_wPortStatus_1 & (1 << RH_PORT_SUSPEND))
-		 && !(r_usb_rh_port_status_1 & (1 << RH_PORT_SUSPEND))) ?
-		(1 << RH_PORT_SUSPEND) : 0;
-
-	hc->rh.wPortChange_2 |=
-		((hc->rh.prev_wPortStatus_2 & (1 << RH_PORT_SUSPEND))
-		 && !(r_usb_rh_port_status_2 & (1 << RH_PORT_SUSPEND))) ?
-		(1 << RH_PORT_SUSPEND) : 0;
-
-
-	/* C_PORT_RESET is set when reset processing on this port is complete. */
-	hc->rh.wPortChange_1 |=
-		((hc->rh.prev_wPortStatus_1 & (1 << RH_PORT_RESET))
-		 && !(r_usb_rh_port_status_1 & (1 << RH_PORT_RESET))) ?
-		(1 << RH_PORT_RESET) : 0;
-
-	hc->rh.wPortChange_2 |=
-		((hc->rh.prev_wPortStatus_2 & (1 << RH_PORT_RESET))
-		 && !(r_usb_rh_port_status_2 & (1 << RH_PORT_RESET))) ?
-		(1 << RH_PORT_RESET) : 0;
-
-	/* Save the new values for next port status change. */
-	hc->rh.prev_wPortStatus_1 = r_usb_rh_port_status_1;
-	hc->rh.prev_wPortStatus_2 = r_usb_rh_port_status_2;
-
-	dbg_rh("hc->rh.wPortChange_1 set to 0x%x", hc->rh.wPortChange_1);
-	dbg_rh("hc->rh.wPortChange_2 set to 0x%x", hc->rh.wPortChange_2);
-
-	DBFEXIT;
-
-}
-
-void etrax_usb_hc_ctl_status_interrupt(usb_interrupt_registers_t *reg)
-{
-	DBFENTER;
-
-	/* FIXME: What should we do if we get ourun or perror? Dump the EP and SB
-	   list for the corresponding epid? */
-	if (reg->r_usb_status & IO_MASK(R_USB_STATUS, ourun)) {
-		panic("USB controller got ourun.");
-	}
-	if (reg->r_usb_status & IO_MASK(R_USB_STATUS, perror)) {
-
-		/* Before, etrax_usb_do_intr_recover was called on this epid if it was
-		   an interrupt pipe. I don't see how re-enabling all EP descriptors
-		   will help if there was a programming error. */
-		panic("USB controller got perror.");
-	}
-
-	if (reg->r_usb_status & IO_MASK(R_USB_STATUS, device_mode)) {
-		/* We should never operate in device mode. */
-		panic("USB controller in device mode.");
-	}
-
-	/* These if-statements could probably be nested. */
-	if (reg->r_usb_status & IO_MASK(R_USB_STATUS, host_mode)) {
-		info("USB controller in host mode.");
-	}
-	if (reg->r_usb_status & IO_MASK(R_USB_STATUS, started)) {
-		info("USB controller started.");
-	}
-	if (reg->r_usb_status & IO_MASK(R_USB_STATUS, running)) {
-		info("USB controller running.");
-	}
-
-	DBFEXIT;
-
-}
-
-
-static int etrax_rh_submit_urb(struct urb *urb)
-{
-	struct usb_device *usb_dev = urb->dev;
-	etrax_hc_t *hc = usb_dev->bus->hcpriv;
-	unsigned int pipe = urb->pipe;
-	struct usb_ctrlrequest *cmd = (struct usb_ctrlrequest *) urb->setup_packet;
-	void *data = urb->transfer_buffer;
-	int leni = urb->transfer_buffer_length;
-	int len = 0;
-	int stat = 0;
-
-	__u16 bmRType_bReq;
-	__u16 wValue;
-	__u16 wIndex;
-	__u16 wLength;
-
-	DBFENTER;
-
-	/* FIXME: What is this interrupt urb that is sent to the root hub? */
-	if (usb_pipetype (pipe) == PIPE_INTERRUPT) {
-		dbg_rh("Root-Hub submit IRQ: every %d ms", urb->interval);
-		hc->rh.urb = urb;
-		hc->rh.send = 1;
-		/* FIXME: We could probably remove this line since it's done
-		   in etrax_rh_init_int_timer. (Don't remove it from
-		   etrax_rh_init_int_timer though.) */
-		hc->rh.interval = urb->interval;
-		etrax_rh_init_int_timer(urb);
-		DBFEXIT;
-
-		return 0;
-	}
-
-	bmRType_bReq = cmd->bRequestType | (cmd->bRequest << 8);
-	wValue = le16_to_cpu(cmd->wValue);
-	wIndex = le16_to_cpu(cmd->wIndex);
-	wLength = le16_to_cpu(cmd->wLength);
-
-	dbg_rh("bmRType_bReq : 0x%04x (%d)", bmRType_bReq, bmRType_bReq);
-	dbg_rh("wValue       : 0x%04x (%d)", wValue, wValue);
-	dbg_rh("wIndex       : 0x%04x (%d)", wIndex, wIndex);
-	dbg_rh("wLength      : 0x%04x (%d)", wLength, wLength);
-
-	switch (bmRType_bReq) {
-
-		/* Request Destination:
-		   without flags: Device,
-		   RH_INTERFACE: interface,
-		   RH_ENDPOINT: endpoint,
-		   RH_CLASS means HUB here,
-		   RH_OTHER | RH_CLASS  almost ever means HUB_PORT here
-		 */
-
-	case RH_GET_STATUS:
-		*(__u16 *) data = cpu_to_le16 (1);
-		OK (2);
-
-	case RH_GET_STATUS | RH_INTERFACE:
-		*(__u16 *) data = cpu_to_le16 (0);
-		OK (2);
-
-	case RH_GET_STATUS | RH_ENDPOINT:
-		*(__u16 *) data = cpu_to_le16 (0);
-		OK (2);
-
-	case RH_GET_STATUS | RH_CLASS:
-		*(__u32 *) data = cpu_to_le32 (0);
-		OK (4);		/* hub power ** */
-
-	case RH_GET_STATUS | RH_OTHER | RH_CLASS:
-		if (wIndex == 1) {
-			*((__u16*)data) = cpu_to_le16(hc->rh.prev_wPortStatus_1);
-			*((__u16*)data + 1) = cpu_to_le16(hc->rh.wPortChange_1);
-		} else if (wIndex == 2) {
-			*((__u16*)data) = cpu_to_le16(hc->rh.prev_wPortStatus_2);
-			*((__u16*)data + 1) = cpu_to_le16(hc->rh.wPortChange_2);
-		} else {
-			dbg_rh("RH_GET_STATUS whith invalid wIndex!");
-			OK(0);
-		}
-
-		OK(4);
-
-	case RH_CLEAR_FEATURE | RH_ENDPOINT:
-		switch (wValue) {
-		case (RH_ENDPOINT_STALL):
-			OK (0);
-		}
-		break;
-
-	case RH_CLEAR_FEATURE | RH_CLASS:
-		switch (wValue) {
-		case (RH_C_HUB_OVER_CURRENT):
-			OK (0);	/* hub power over current ** */
-		}
-		break;
-
-	case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
-		switch (wValue) {
-		case (RH_PORT_ENABLE):
-			if (wIndex == 1) {
-
-				dbg_rh("trying to do disable port 1");
-
-				*R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, yes);
-
-				while (hc->rh.prev_wPortStatus_1 &
-				       IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes));
-				*R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, no);
-				dbg_rh("Port 1 is disabled");
-
-			} else if (wIndex == 2) {
-
-				dbg_rh("trying to do disable port 2");
-
-				*R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, yes);
-
-				while (hc->rh.prev_wPortStatus_2 &
-				       IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, yes));
-				*R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, no);
-				dbg_rh("Port 2 is disabled");
-
-			} else {
-				dbg_rh("RH_CLEAR_FEATURE->RH_PORT_ENABLE "
-				       "with invalid wIndex == %d!", wIndex);
-			}
-
-			OK (0);
-		case (RH_PORT_SUSPEND):
-			/* Opposite to suspend should be resume, so we'll do a resume. */
-			/* FIXME: USB 1.1, 11.16.2.2 says:
-			   "Clearing the PORT_SUSPEND feature causes a host-initiated resume
-			   on the specified port. If the port is not in the Suspended state,
-			   the hub should treat this request as a functional no-operation."
-			   Shouldn't we check if the port is in a suspended state before
-			   resuming? */
-
-			/* Make sure the controller isn't busy. */
-			while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy));
-
-			if (wIndex == 1) {
-				*R_USB_COMMAND =
-					IO_STATE(R_USB_COMMAND, port_sel, port1) |
-					IO_STATE(R_USB_COMMAND, port_cmd, resume) |
-					IO_STATE(R_USB_COMMAND, ctrl_cmd, nop);
-			} else if (wIndex == 2) {
-				*R_USB_COMMAND =
-					IO_STATE(R_USB_COMMAND, port_sel, port2) |
-					IO_STATE(R_USB_COMMAND, port_cmd, resume) |
-					IO_STATE(R_USB_COMMAND, ctrl_cmd, nop);
-			} else {
-				dbg_rh("RH_CLEAR_FEATURE->RH_PORT_SUSPEND "
-				       "with invalid wIndex == %d!", wIndex);
-			}
-
-			OK (0);
-		case (RH_PORT_POWER):
-			OK (0);	/* port power ** */
-		case (RH_C_PORT_CONNECTION):
-			if (wIndex == 1) {
-				hc->rh.wPortChange_1 &= ~(1 << RH_PORT_CONNECTION);
-			} else if (wIndex == 2) {
-				hc->rh.wPortChange_2 &= ~(1 << RH_PORT_CONNECTION);
-			} else {
-				dbg_rh("RH_CLEAR_FEATURE->RH_C_PORT_CONNECTION "
-				       "with invalid wIndex == %d!", wIndex);
-			}
-
-			OK (0);
-		case (RH_C_PORT_ENABLE):
-			if (wIndex == 1) {
-				hc->rh.wPortChange_1 &= ~(1 << RH_PORT_ENABLE);
-			} else if (wIndex == 2) {
-				hc->rh.wPortChange_2 &= ~(1 << RH_PORT_ENABLE);
-			} else {
-				dbg_rh("RH_CLEAR_FEATURE->RH_C_PORT_ENABLE "
-				       "with invalid wIndex == %d!", wIndex);
-			}
-			OK (0);
-		case (RH_C_PORT_SUSPEND):
-/*** WR_RH_PORTSTAT(RH_PS_PSSC); */
-			OK (0);
-		case (RH_C_PORT_OVER_CURRENT):
-			OK (0);	/* port power over current ** */
-		case (RH_C_PORT_RESET):
-			if (wIndex == 1) {
-				hc->rh.wPortChange_1 &= ~(1 << RH_PORT_RESET);
-			} else if (wIndex == 2) {
-				hc->rh.wPortChange_2 &= ~(1 << RH_PORT_RESET);
-			} else {
-				dbg_rh("RH_CLEAR_FEATURE->RH_C_PORT_RESET "
-				       "with invalid index == %d!", wIndex);
-			}
-
-			OK (0);
-
-		}
-		break;
-
-	case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
-		switch (wValue) {
-		case (RH_PORT_SUSPEND):
-
-			/* Make sure the controller isn't busy. */
-			while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy));
-
-			if (wIndex == 1) {
-				*R_USB_COMMAND =
-					IO_STATE(R_USB_COMMAND, port_sel, port1) |
-					IO_STATE(R_USB_COMMAND, port_cmd, suspend) |
-					IO_STATE(R_USB_COMMAND, ctrl_cmd, nop);
-			} else if (wIndex == 2) {
-				*R_USB_COMMAND =
-					IO_STATE(R_USB_COMMAND, port_sel, port2) |
-					IO_STATE(R_USB_COMMAND, port_cmd, suspend) |
-					IO_STATE(R_USB_COMMAND, ctrl_cmd, nop);
-			} else {
-				dbg_rh("RH_SET_FEATURE->RH_PORT_SUSPEND "
-				       "with invalid wIndex == %d!", wIndex);
-			}
-
-			OK (0);
-		case (RH_PORT_RESET):
-			if (wIndex == 1) {
-
-			port_1_reset:
-				dbg_rh("Doing reset of port 1");
-
-				/* Make sure the controller isn't busy. */
-				while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy));
-
-				*R_USB_COMMAND =
-					IO_STATE(R_USB_COMMAND, port_sel, port1) |
-					IO_STATE(R_USB_COMMAND, port_cmd, reset) |
-					IO_STATE(R_USB_COMMAND, ctrl_cmd, nop);
-
-				/* We must wait at least 10 ms for the device to recover.
-				   15 ms should be enough. */
-				udelay(15000);
-
-				/* Wait for reset bit to go low (should be done by now). */
-				while (hc->rh.prev_wPortStatus_1 &
-				       IO_STATE(R_USB_RH_PORT_STATUS_1, reset, yes));
-
-				/* If the port status is
-				   1) connected and enabled then there is a device and everything is fine
-				   2) neither connected nor enabled then there is no device, also fine
-				   3) connected and not enabled then we try again
-				   (Yes, there are other port status combinations besides these.) */
-
-				if ((hc->rh.prev_wPortStatus_1 &
-				     IO_STATE(R_USB_RH_PORT_STATUS_1, connected, yes)) &&
-				    (hc->rh.prev_wPortStatus_1 &
-				     IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, no))) {
-					dbg_rh("Connected device on port 1, but port not enabled?"
-					       " Trying reset again.");
-					goto port_2_reset;
-				}
-
-				/* Diagnostic printouts. */
-				if ((hc->rh.prev_wPortStatus_1 &
-				     IO_STATE(R_USB_RH_PORT_STATUS_1, connected, no)) &&
-				    (hc->rh.prev_wPortStatus_1 &
-				     IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, no))) {
-					dbg_rh("No connected device on port 1");
-				} else if ((hc->rh.prev_wPortStatus_1 &
-					    IO_STATE(R_USB_RH_PORT_STATUS_1, connected, yes)) &&
-					   (hc->rh.prev_wPortStatus_1 &
-					    IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes))) {
-					dbg_rh("Connected device on port 1, port 1 enabled");
-				}
-
-			} else if (wIndex == 2) {
-
-			port_2_reset:
-				dbg_rh("Doing reset of port 2");
-
-				/* Make sure the controller isn't busy. */
-				while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy));
-
-				/* Issue the reset command. */
-				*R_USB_COMMAND =
-					IO_STATE(R_USB_COMMAND, port_sel, port2) |
-					IO_STATE(R_USB_COMMAND, port_cmd, reset) |
-					IO_STATE(R_USB_COMMAND, ctrl_cmd, nop);
-
-				/* We must wait at least 10 ms for the device to recover.
-				   15 ms should be enough. */
-				udelay(15000);
-
-				/* Wait for reset bit to go low (should be done by now). */
-				while (hc->rh.prev_wPortStatus_2 &
-				       IO_STATE(R_USB_RH_PORT_STATUS_2, reset, yes));
-
-				/* If the port status is
-				   1) connected and enabled then there is a device and everything is fine
-				   2) neither connected nor enabled then there is no device, also fine
-				   3) connected and not enabled then we try again
-				   (Yes, there are other port status combinations besides these.) */
-
-				if ((hc->rh.prev_wPortStatus_2 &
-				     IO_STATE(R_USB_RH_PORT_STATUS_2, connected, yes)) &&
-				    (hc->rh.prev_wPortStatus_2 &
-				     IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, no))) {
-					dbg_rh("Connected device on port 2, but port not enabled?"
-					       " Trying reset again.");
-					goto port_2_reset;
-				}
-
-				/* Diagnostic printouts. */
-				if ((hc->rh.prev_wPortStatus_2 &
-				     IO_STATE(R_USB_RH_PORT_STATUS_2, connected, no)) &&
-				    (hc->rh.prev_wPortStatus_2 &
-				     IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, no))) {
-					dbg_rh("No connected device on port 2");
-				} else if ((hc->rh.prev_wPortStatus_2 &
-					    IO_STATE(R_USB_RH_PORT_STATUS_2, connected, yes)) &&
-					   (hc->rh.prev_wPortStatus_2 &
-					    IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, yes))) {
-					dbg_rh("Connected device on port 2, port 2 enabled");
-				}
-
-			} else {
-				dbg_rh("RH_SET_FEATURE->RH_PORT_RESET with invalid wIndex = %d", wIndex);
-			}
-
-			/* Make sure the controller isn't busy. */
-			while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy));
-
-			/* If all enabled ports were disabled the host controller goes down into
-			   started mode, so we need to bring it back into the running state.
-			   (This is safe even if it's already in the running state.) */
-			*R_USB_COMMAND =
-				IO_STATE(R_USB_COMMAND, port_sel, nop) |
-				IO_STATE(R_USB_COMMAND, port_cmd, reset) |
-				IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run);
-
-			dbg_rh("...Done");
-			OK(0);
-
-		case (RH_PORT_POWER):
-			OK (0);	/* port power ** */
-		case (RH_PORT_ENABLE):
-			/* There is no port enable command in the host controller, so if the
-			   port is already enabled, we do nothing. If not, we reset the port
-			   (with an ugly goto). */
-
-			if (wIndex == 1) {
-				if (hc->rh.prev_wPortStatus_1 &
-				    IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, no)) {
-					goto port_1_reset;
-				}
-			} else if (wIndex == 2) {
-				if (hc->rh.prev_wPortStatus_2 &
-				    IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, no)) {
-					goto port_2_reset;
-				}
-			} else {
-				dbg_rh("RH_SET_FEATURE->RH_GET_STATUS with invalid wIndex = %d", wIndex);
-			}
-			OK (0);
-		}
-		break;
-
-	case RH_SET_ADDRESS:
-		hc->rh.devnum = wValue;
-		dbg_rh("RH address set to: %d", hc->rh.devnum);
-		OK (0);
-
-	case RH_GET_DESCRIPTOR:
-		switch ((wValue & 0xff00) >> 8) {
-		case (0x01):	/* device descriptor */
-			len = min_t(unsigned int, leni, min_t(unsigned int, sizeof (root_hub_dev_des), wLength));
-			memcpy (data, root_hub_dev_des, len);
-			OK (len);
-		case (0x02):	/* configuration descriptor */
-			len = min_t(unsigned int, leni, min_t(unsigned int, sizeof (root_hub_config_des), wLength));
-			memcpy (data, root_hub_config_des, len);
-			OK (len);
-		case (0x03):	/* string descriptors */
-			len = usb_root_hub_string (wValue & 0xff,
-						   0xff, "ETRAX 100LX",
-						   data, wLength);
-			if (len > 0) {
-				OK(min(leni, len));
-			} else {
-				stat = -EPIPE;
-			}
-
-		}
-		break;
-
-	case RH_GET_DESCRIPTOR | RH_CLASS:
-		root_hub_hub_des[2] = hc->rh.numports;
-		len = min_t(unsigned int, leni, min_t(unsigned int, sizeof (root_hub_hub_des), wLength));
-		memcpy (data, root_hub_hub_des, len);
-		OK (len);
-
-	case RH_GET_CONFIGURATION:
-		*(__u8 *) data = 0x01;
-		OK (1);
-
-	case RH_SET_CONFIGURATION:
-		OK (0);
-
-	default:
-		stat = -EPIPE;
-	}
-
-	urb->actual_length = len;
-	urb->status = stat;
-	urb->dev = NULL;
-	if (urb->complete) {
-		urb->complete(urb, NULL);
-	}
-	DBFEXIT;
-
-	return 0;
-}
-
-static void
-etrax_usb_bulk_eot_timer_func(unsigned long dummy)
-{
-	/* Because of a race condition in the top half, we might miss a bulk eot.
-	   This timer "simulates" a bulk eot if we don't get one for a while, hopefully
-	   correcting the situation. */
-	dbg_bulk("bulk_eot_timer timed out.");
-	etrax_usb_hc_bulk_eot_interrupt(1);
-}
-
-static void*
-etrax_usb_buffer_alloc(struct usb_bus* bus, size_t size,
-	unsigned mem_flags, dma_addr_t *dma)
-{
-  return kmalloc(size, mem_flags);
-}
-
-static void
-etrax_usb_buffer_free(struct usb_bus *bus, size_t size, void *addr, dma_addr_t dma)
-{
-  kfree(addr);
-}
-
-
-static struct device fake_device;
-
-static int __init etrax_usb_hc_init(void)
-{
-	static etrax_hc_t *hc;
-	struct usb_bus *bus;
-	struct usb_device *usb_rh;
-	int i;
-
-	DBFENTER;
-
-	info("ETRAX 100LX USB-HCD %s (c) 2001-2003 Axis Communications AB\n", usb_hcd_version);
-
- 	hc = kmalloc(sizeof(etrax_hc_t), GFP_KERNEL);
-	assert(hc != NULL);
-
-	/* We use kmem_cache_* to make sure that all DMA desc. are dword aligned */
-	/* Note that we specify sizeof(USB_EP_Desc_t) as the size, but also allocate
-	   SB descriptors from this cache. This is ok since sizeof(USB_EP_Desc_t) ==
-	   sizeof(USB_SB_Desc_t). */
-
-	usb_desc_cache = kmem_cache_create("usb_desc_cache", sizeof(USB_EP_Desc_t), 0,
-					   SLAB_HWCACHE_ALIGN, 0, 0);
-	assert(usb_desc_cache != NULL);
-
-	top_half_reg_cache = kmem_cache_create("top_half_reg_cache",
-					       sizeof(usb_interrupt_registers_t),
-					       0, SLAB_HWCACHE_ALIGN, 0, 0);
-	assert(top_half_reg_cache != NULL);
-
-	isoc_compl_cache = kmem_cache_create("isoc_compl_cache",
-						sizeof(usb_isoc_complete_data_t),
-						0, SLAB_HWCACHE_ALIGN, 0, 0);
-	assert(isoc_compl_cache != NULL);
-
-	etrax_usb_bus = bus = usb_alloc_bus(&etrax_usb_device_operations);
-	hc->bus = bus;
-	bus->bus_name="ETRAX 100LX";
-	bus->hcpriv = hc;
-
-	/* Initialize RH to the default address.
-	   And make sure that we have no status change indication */
-	hc->rh.numports = 2;  /* The RH has two ports */
-	hc->rh.devnum = 1;
-	hc->rh.wPortChange_1 = 0;
-	hc->rh.wPortChange_2 = 0;
-
-	/* Also initate the previous values to zero */
-	hc->rh.prev_wPortStatus_1 = 0;
-	hc->rh.prev_wPortStatus_2 = 0;
-
-	/* Initialize the intr-traffic flags */
-	/* FIXME: This isn't used. (Besides, the error field isn't initialized.) */
-	hc->intr.sleeping = 0;
-	hc->intr.wq = NULL;
-
-	epid_usage_bitmask = 0;
-	epid_out_traffic = 0;
-
-	/* Mark the invalid epid as being used. */
-	set_bit(INVALID_EPID, (void *)&epid_usage_bitmask);
-	*R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, INVALID_EPID);
-	nop();
-	/* The valid bit should still be set ('invalid' is in our world; not the hardware's). */
-	*R_USB_EPT_DATA = (IO_STATE(R_USB_EPT_DATA, valid, yes) |
-			   IO_FIELD(R_USB_EPT_DATA, max_len, 1));
-
-	/* Mark the dummy epid as being used. */
-	set_bit(DUMMY_EPID, (void *)&epid_usage_bitmask);
-	*R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, DUMMY_EPID);
-	nop();
-	*R_USB_EPT_DATA = (IO_STATE(R_USB_EPT_DATA, valid, no) |
-			   IO_FIELD(R_USB_EPT_DATA, max_len, 1));
-
-	/* Initialize the urb list by initiating a head for each list. */
-	for (i = 0; i < NBR_OF_EPIDS; i++) {
-		INIT_LIST_HEAD(&urb_list[i]);
-	}
-	spin_lock_init(&urb_list_lock);
-
-	INIT_LIST_HEAD(&urb_unlink_list);
-
-
-	/* Initiate the bulk start timer. */
-	init_timer(&bulk_start_timer);
-	bulk_start_timer.expires = jiffies + BULK_START_TIMER_INTERVAL;
-	bulk_start_timer.function = etrax_usb_bulk_start_timer_func;
-	add_timer(&bulk_start_timer);
-
-
-	/* Initiate the bulk eot timer. */
-	init_timer(&bulk_eot_timer);
-	bulk_eot_timer.expires = jiffies + BULK_EOT_TIMER_INTERVAL;
-	bulk_eot_timer.function = etrax_usb_bulk_eot_timer_func;
-	add_timer(&bulk_eot_timer);
-
-	/* Set up the data structures for USB traffic. Note that this must be done before
-	   any interrupt that relies on sane DMA list occurrs. */
-	init_rx_buffers();
-	init_tx_bulk_ep();
-	init_tx_ctrl_ep();
-	init_tx_intr_ep();
-	init_tx_isoc_ep();
-
-        device_initialize(&fake_device);
-        kobject_set_name(&fake_device.kobj, "etrax_usb");
-        kobject_add(&fake_device.kobj);
-	kobject_uevent(&fake_device.kobj, KOBJ_ADD);
-        hc->bus->controller = &fake_device;
-	usb_register_bus(hc->bus);
-
-	*R_IRQ_MASK2_SET =
-		/* Note that these interrupts are not used. */
-		IO_STATE(R_IRQ_MASK2_SET, dma8_sub0_descr, set) |
-		/* Sub channel 1 (ctrl) descr. interrupts are used. */
-		IO_STATE(R_IRQ_MASK2_SET, dma8_sub1_descr, set) |
-		IO_STATE(R_IRQ_MASK2_SET, dma8_sub2_descr, set) |
-		/* Sub channel 3 (isoc) descr. interrupts are used. */
-		IO_STATE(R_IRQ_MASK2_SET, dma8_sub3_descr, set);
-
-	/* Note that the dma9_descr interrupt is not used. */
-	*R_IRQ_MASK2_SET =
-		IO_STATE(R_IRQ_MASK2_SET, dma9_eop, set) |
-		IO_STATE(R_IRQ_MASK2_SET, dma9_descr, set);
-
-	/* FIXME: Enable iso_eof only when isoc traffic is running. */
-	*R_USB_IRQ_MASK_SET =
-		IO_STATE(R_USB_IRQ_MASK_SET, iso_eof, set) |
-		IO_STATE(R_USB_IRQ_MASK_SET, bulk_eot, set) |
-		IO_STATE(R_USB_IRQ_MASK_SET, epid_attn, set) |
-		IO_STATE(R_USB_IRQ_MASK_SET, port_status, set) |
-		IO_STATE(R_USB_IRQ_MASK_SET, ctl_status, set);
-
-
-	if (request_irq(ETRAX_USB_HC_IRQ, etrax_usb_hc_interrupt_top_half, 0,
-			"ETRAX 100LX built-in USB (HC)", hc)) {
-		err("Could not allocate IRQ %d for USB", ETRAX_USB_HC_IRQ);
-		etrax_usb_hc_cleanup();
-		DBFEXIT;
-		return -1;
-	}
-
-	if (request_irq(ETRAX_USB_RX_IRQ, etrax_usb_rx_interrupt, 0,
-			"ETRAX 100LX built-in USB (Rx)", hc)) {
-		err("Could not allocate IRQ %d for USB", ETRAX_USB_RX_IRQ);
-		etrax_usb_hc_cleanup();
-		DBFEXIT;
-		return -1;
-	}
-
-	if (request_irq(ETRAX_USB_TX_IRQ, etrax_usb_tx_interrupt, 0,
-			"ETRAX 100LX built-in USB (Tx)", hc)) {
-		err("Could not allocate IRQ %d for USB", ETRAX_USB_TX_IRQ);
-		etrax_usb_hc_cleanup();
-		DBFEXIT;
-		return -1;
-	}
-
-	/* R_USB_COMMAND:
-	   USB commands in host mode. The fields in this register should all be
-	   written to in one write. Do not read-modify-write one field at a time. A
-	   write to this register will trigger events in the USB controller and an
-	   incomplete command may lead to unpredictable results, and in worst case
-	   even to a deadlock in the controller.
-	   (Note however that the busy field is read-only, so no need to write to it.) */
-
-	/* Check the busy bit before writing to R_USB_COMMAND. */
-
-	while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy));
-
-	/* Reset the USB interface. */
-	*R_USB_COMMAND =
-		IO_STATE(R_USB_COMMAND, port_sel, nop) |
-		IO_STATE(R_USB_COMMAND, port_cmd, reset) |
-		IO_STATE(R_USB_COMMAND, ctrl_cmd, reset);
-
-	/* Designer's Reference, p. 8 - 10 says we should Initate R_USB_FM_PSTART to 0x2A30 (10800),
-	   to guarantee that control traffic gets 10% of the bandwidth, and periodic transfer may
-	   allocate the rest (90%). This doesn't work though. Read on for a lenghty explanation.
-
-	   While there is a difference between rev. 2 and rev. 3 of the ETRAX 100LX regarding the NAK
-	   behaviour, it doesn't solve this problem. What happens is that a control transfer will not
-	   be interrupted in its data stage when PSTART happens (the point at which periodic traffic
-	   is started). Thus, if PSTART is set to 10800 and its IN or OUT token is NAKed until just before
-	   PSTART happens, it will continue the IN/OUT transfer as long as it's ACKed. After it's done,
-	   there may be too little time left for an isochronous transfer, causing an epid attention
-	   interrupt due to perror. The work-around for this is to let the control transfers run at the
-	   end of the frame instead of at the beginning, and will be interrupted just fine if it doesn't
-	   fit into the frame. However, since there will *always* be a control transfer at the beginning
-	   of the frame, regardless of what we set PSTART to, that transfer might be a 64-byte transfer
-	   which consumes up to 15% of the frame, leaving only 85% for periodic traffic. The solution to
-	   this would be to 'dummy allocate' 5% of the frame with the usb_claim_bandwidth function to make
-	   sure that the periodic transfers that are inserted will always fit in the frame.
-
-	   The idea was suggested that a control transfer could be split up into several 8 byte transfers,
-	   so that it would be interrupted by PSTART, but since this can't be done for an IN transfer this
-	   hasn't been implemented.
-
-	   The value 11960 is chosen to be just after the SOF token, with a couple of bit times extra
-	   for possible bit stuffing. */
-
-	*R_USB_FM_PSTART = IO_FIELD(R_USB_FM_PSTART, value, 11960);
-
-#ifdef CONFIG_ETRAX_USB_HOST_PORT1
-	*R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, no);
-#endif
-
-#ifdef CONFIG_ETRAX_USB_HOST_PORT2
-	*R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, no);
-#endif
-
-	while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy));
-
-	/* Configure the USB interface as a host controller. */
-	*R_USB_COMMAND =
-		IO_STATE(R_USB_COMMAND, port_sel, nop) |
-		IO_STATE(R_USB_COMMAND, port_cmd, reset) |
-		IO_STATE(R_USB_COMMAND, ctrl_cmd, host_config);
-
-	/* Note: Do not reset any ports here. Await the port status interrupts, to have a controlled
-	   sequence of resetting the ports. If we reset both ports now, and there are devices
-	   on both ports, we will get a bus error because both devices will answer the set address
-	   request. */
-
-	while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy));
-
-	/* Start processing of USB traffic. */
-	*R_USB_COMMAND =
-		IO_STATE(R_USB_COMMAND, port_sel, nop) |
-		IO_STATE(R_USB_COMMAND, port_cmd, reset) |
-		IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run);
-
-	while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy));
-
-	usb_rh = usb_alloc_dev(NULL, hc->bus, 0);
-	hc->bus->root_hub = usb_rh;
-        usb_rh->state = USB_STATE_ADDRESS;
-        usb_rh->speed = USB_SPEED_FULL;
-        usb_rh->devnum = 1;
-        hc->bus->devnum_next = 2;
-        usb_rh->ep0.desc.wMaxPacketSize = __const_cpu_to_le16(64);
-        usb_get_device_descriptor(usb_rh, USB_DT_DEVICE_SIZE);
-	usb_new_device(usb_rh);
-
-	DBFEXIT;
-
-	return 0;
-}
-
-static void etrax_usb_hc_cleanup(void)
-{
-	DBFENTER;
-
-	free_irq(ETRAX_USB_HC_IRQ, NULL);
-	free_irq(ETRAX_USB_RX_IRQ, NULL);
-	free_irq(ETRAX_USB_TX_IRQ, NULL);
-
-	usb_deregister_bus(etrax_usb_bus);
-
-	/* FIXME: call kmem_cache_destroy here? */
-
-	DBFEXIT;
-}
 
-module_init(etrax_usb_hc_init);
-module_exit(etrax_usb_hc_cleanup);
+/* Module hooks */
+module_init(module_hcd_init);
+module_exit(module_hcd_exit);
--- linux-2.6.19.2.orig/drivers/usb/host/hc-crisv10.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.19.2.dev/drivers/usb/host/hc-crisv10.c	2007-02-26 20:58:29.000000000 +0100
@@ -0,0 +1,4684 @@
+/*
+ *
+ * ETRAX 100LX USB Host Controller Driver
+ *
+ * Copyright (C) 2005, 2006  Axis Communications AB
+ *
+ * Author: Konrad Eriksson <konrad.eriksson@axis.se>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/moduleparam.h>
+#include <linux/spinlock.h>
+#include <linux/usb.h>
+#include <linux/platform_device.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/arch/dma.h>
+#include <asm/arch/io_interface_mux.h>
+
+#include "../core/hcd.h"
+#include "../core/hub.h"
+#include "hc-crisv10.h"
+#include "hc-cris-dbg.h"
+
+
+/***************************************************************************/
+/***************************************************************************/
+/* Host Controller settings                                                */
+/***************************************************************************/
+/***************************************************************************/
+
+#define VERSION			"1.00"
+#define COPYRIGHT		"(c) 2005, 2006 Axis Communications AB"
+#define DESCRIPTION             "ETRAX 100LX USB Host Controller"
+
+#define ETRAX_USB_HC_IRQ USB_HC_IRQ_NBR
+#define ETRAX_USB_RX_IRQ USB_DMA_RX_IRQ_NBR
+#define ETRAX_USB_TX_IRQ USB_DMA_TX_IRQ_NBR
+
+/* Number of physical ports in Etrax 100LX */
+#define USB_ROOT_HUB_PORTS 2
+
+const char hc_name[] = "hc-crisv10";
+const char product_desc[] = DESCRIPTION;
+
+/* The number of epids is, among other things, used for pre-allocating
+   ctrl, bulk and isoc EP descriptors (one for each epid).
+   Assumed to be > 1 when initiating the DMA lists. */
+#define NBR_OF_EPIDS       32
+
+/* Support interrupt traffic intervals up to 128 ms. */
+#define MAX_INTR_INTERVAL  128
+
+/* If periodic traffic (intr or isoc) is to be used, then one entry in the EP
+   table must be "invalid". By this we mean that we shouldn't care about epid
+   attentions for this epid, or at least handle them differently from epid
+   attentions for "valid" epids. This define determines which one to use
+   (don't change it). */
+#define INVALID_EPID       31
+/* A special epid for the bulk dummys. */
+#define DUMMY_EPID         30
+
+/* Module settings */
+
+MODULE_DESCRIPTION(DESCRIPTION);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Konrad Eriksson <konrad.eriksson@axis.se>");
+
+
+/* Module parameters */
+
+/* 0 = No ports enabled
+   1 = Only port 1 enabled (on board ethernet on devboard)
+   2 = Only port 2 enabled (external connector on devboard)
+   3 = Both ports enabled
+*/
+static unsigned int ports = 3;
+module_param(ports, uint, S_IRUGO);
+MODULE_PARM_DESC(ports, "Bitmask indicating USB ports to use");
+
+
+/***************************************************************************/
+/***************************************************************************/
+/* Shared global variables for this module                                 */
+/***************************************************************************/
+/***************************************************************************/
+
+/* EP descriptor lists for non period transfers. Must be 32-bit aligned. */
+static volatile struct USB_EP_Desc TxBulkEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4)));
+
+static volatile struct USB_EP_Desc TxCtrlEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4)));
+
+/* EP descriptor lists for period transfers. Must be 32-bit aligned. */
+static volatile struct USB_EP_Desc TxIntrEPList[MAX_INTR_INTERVAL] __attribute__ ((aligned (4)));
+static volatile struct USB_SB_Desc TxIntrSB_zout __attribute__ ((aligned (4)));
+
+static volatile struct USB_EP_Desc TxIsocEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4)));
+static volatile struct USB_SB_Desc TxIsocSB_zout __attribute__ ((aligned (4)));
+
+static volatile struct USB_SB_Desc TxIsocSBList[NBR_OF_EPIDS] __attribute__ ((aligned (4))); 
+
+/* After each enabled bulk EP IN we put two disabled EP descriptors with the eol flag set,
+   causing the DMA to stop the DMA channel. The first of these two has the intr flag set, which
+   gives us a dma8_sub0_descr interrupt. When we receive this, we advance the DMA one step in the
+   EP list and then restart the bulk channel, thus forcing a switch between bulk EP descriptors
+   in each frame. */
+static volatile struct USB_EP_Desc TxBulkDummyEPList[NBR_OF_EPIDS][2] __attribute__ ((aligned (4)));
+
+/* List of URB pointers, where each points to the active URB for a epid.
+   For Bulk, Ctrl and Intr this means which URB that currently is added to
+   DMA lists (Isoc URBs are all directly added to DMA lists). As soon as
+   URB has completed is the queue examined and the first URB in queue is
+   removed and moved to the activeUrbList while its state change to STARTED and
+   its transfer(s) gets added to DMA list (exception Isoc where URBs enter
+   state STARTED directly and added transfers added to DMA lists). */
+static struct urb *activeUrbList[NBR_OF_EPIDS];
+
+/* Additional software state info for each epid */
+static struct etrax_epid epid_state[NBR_OF_EPIDS];
+
+/* Timer handles for bulk traffic timer used to avoid DMA bug where DMA stops
+   even if there is new data waiting to be processed */
+static struct timer_list bulk_start_timer = TIMER_INITIALIZER(NULL, 0, 0);
+static struct timer_list bulk_eot_timer = TIMER_INITIALIZER(NULL, 0, 0);
+
+/* We want the start timer to expire before the eot timer, because the former
+   might start traffic, thus making it unnecessary for the latter to time
+   out. */
+#define BULK_START_TIMER_INTERVAL (HZ/50) /* 20 ms */
+#define BULK_EOT_TIMER_INTERVAL (HZ/16) /* 60 ms */
+
+/* Delay before a URB completion happen when it's scheduled to be delayed */
+#define LATER_TIMER_DELAY (HZ/50) /* 20 ms */
+
+/* Simplifying macros for checking software state info of a epid */
+/* ----------------------------------------------------------------------- */
+#define epid_inuse(epid)       epid_state[epid].inuse
+#define epid_out_traffic(epid) epid_state[epid].out_traffic
+#define epid_isoc(epid)   (epid_state[epid].type == PIPE_ISOCHRONOUS ? 1 : 0)
+#define epid_intr(epid)   (epid_state[epid].type == PIPE_INTERRUPT ? 1 : 0)
+
+
+/***************************************************************************/
+/***************************************************************************/
+/* DEBUG FUNCTIONS                                                         */
+/***************************************************************************/
+/***************************************************************************/
+/* Note that these functions are always available in their "__" variants,
+   for use in error situations. The "__" missing variants are controlled by
+   the USB_DEBUG_DESC/USB_DEBUG_URB macros. */
+static void __dump_urb(struct urb* purb)
+{
+  struct crisv10_urb_priv *urb_priv = purb->hcpriv;
+  int urb_num = -1;
+  if(urb_priv) {
+    urb_num = urb_priv->urb_num;
+  }
+  printk("\nURB:0x%x[%d]\n", (unsigned int)purb, urb_num);
+  printk("dev                   :0x%08lx\n", (unsigned long)purb->dev);
+  printk("pipe                  :0x%08x\n", purb->pipe);
+  printk("status                :%d\n", purb->status);
+  printk("transfer_flags        :0x%08x\n", purb->transfer_flags);
+  printk("transfer_buffer       :0x%08lx\n", (unsigned long)purb->transfer_buffer);
+  printk("transfer_buffer_length:%d\n", purb->transfer_buffer_length);
+  printk("actual_length         :%d\n", purb->actual_length);
+  printk("setup_packet          :0x%08lx\n", (unsigned long)purb->setup_packet);
+  printk("start_frame           :%d\n", purb->start_frame);
+  printk("number_of_packets     :%d\n", purb->number_of_packets);
+  printk("interval              :%d\n", purb->interval);
+  printk("error_count           :%d\n", purb->error_count);
+  printk("context               :0x%08lx\n", (unsigned long)purb->context);
+  printk("complete              :0x%08lx\n\n", (unsigned long)purb->complete);
+}
+
+static void __dump_in_desc(volatile struct USB_IN_Desc *in)
+{
+  printk("\nUSB_IN_Desc at 0x%08lx\n", (unsigned long)in);
+  printk("  sw_len  : 0x%04x (%d)\n", in->sw_len, in->sw_len);
+  printk("  command : 0x%04x\n", in->command);
+  printk("  next    : 0x%08lx\n", in->next);
+  printk("  buf     : 0x%08lx\n", in->buf);
+  printk("  hw_len  : 0x%04x (%d)\n", in->hw_len, in->hw_len);
+  printk("  status  : 0x%04x\n\n", in->status);
+}
+
+static void __dump_sb_desc(volatile struct USB_SB_Desc *sb)
+{
+  char tt = (sb->command & 0x30) >> 4;
+  char *tt_string;
+
+  switch (tt) {
+  case 0:
+    tt_string = "zout";
+    break;
+  case 1:
+    tt_string = "in";
+    break;
+  case 2:
+    tt_string = "out";
+    break;
+  case 3:
+    tt_string = "setup";
+    break;
+  default:
+    tt_string = "unknown (weird)";
+  }
+
+  printk(" USB_SB_Desc at 0x%08lx ", (unsigned long)sb);
+  printk(" command:0x%04x (", sb->command);
+  printk("rem:%d ", (sb->command & 0x3f00) >> 8);
+  printk("full:%d ", (sb->command & 0x40) >> 6);
+  printk("tt:%d(%s) ", tt, tt_string);
+  printk("intr:%d ", (sb->command & 0x8) >> 3);
+  printk("eot:%d ", (sb->command & 0x2) >> 1);
+  printk("eol:%d)", sb->command & 0x1);
+  printk(" sw_len:0x%04x(%d)", sb->sw_len, sb->sw_len);
+  printk(" next:0x%08lx", sb->next);
+  printk(" buf:0x%08lx\n", sb->buf);
+}
+
+
+static void __dump_ep_desc(volatile struct USB_EP_Desc *ep)
+{
+  printk("USB_EP_Desc at 0x%08lx ", (unsigned long)ep);
+  printk(" command:0x%04x (", ep->command);
+  printk("ep_id:%d ", (ep->command & 0x1f00) >> 8);
+  printk("enable:%d ", (ep->command & 0x10) >> 4);
+  printk("intr:%d ", (ep->command & 0x8) >> 3);
+  printk("eof:%d ", (ep->command & 0x2) >> 1);
+  printk("eol:%d)", ep->command & 0x1);
+  printk(" hw_len:0x%04x(%d)", ep->hw_len, ep->hw_len);
+  printk(" next:0x%08lx", ep->next);
+  printk(" sub:0x%08lx\n", ep->sub);
+}
+
+static inline void __dump_ep_list(int pipe_type)
+{
+  volatile struct USB_EP_Desc *ep;
+  volatile struct USB_EP_Desc *first_ep;
+  volatile struct USB_SB_Desc *sb;
+
+  switch (pipe_type)
+    {
+    case PIPE_BULK:
+      first_ep = &TxBulkEPList[0];
+      break;
+    case PIPE_CONTROL:
+      first_ep = &TxCtrlEPList[0];
+      break;
+    case PIPE_INTERRUPT:
+      first_ep = &TxIntrEPList[0];
+      break;
+    case PIPE_ISOCHRONOUS:
+      first_ep = &TxIsocEPList[0];
+      break;
+    default:
+      warn("Cannot dump unknown traffic type");
+      return;
+    }
+  ep = first_ep;
+
+  printk("\n\nDumping EP list...\n\n");
+
+  do {
+    __dump_ep_desc(ep);
+    /* Cannot phys_to_virt on 0 as it turns into 80000000, which is != 0. */
+    sb = ep->sub ? phys_to_virt(ep->sub) : 0;
+    while (sb) {
+      __dump_sb_desc(sb);
+      sb = sb->next ? phys_to_virt(sb->next) : 0;
+    }
+    ep = (volatile struct USB_EP_Desc *)(phys_to_virt(ep->next));
+
+  } while (ep != first_ep);
+}
+
+static inline void __dump_ept_data(int epid)
+{
+  unsigned long flags;
+  __u32 r_usb_ept_data;
+
+  if (epid < 0 || epid > 31) {
+    printk("Cannot dump ept data for invalid epid %d\n", epid);
+    return;
+  }
+
+  local_irq_save(flags);
+  *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
+  nop();
+  r_usb_ept_data = *R_USB_EPT_DATA;
+  local_irq_restore(flags);
+
+  printk(" R_USB_EPT_DATA = 0x%x for epid %d :\n", r_usb_ept_data, epid);
+  if (r_usb_ept_data == 0) {
+    /* No need for more detailed printing. */
+    return;
+  }
+  printk("  valid           : %d\n", (r_usb_ept_data & 0x80000000) >> 31);
+  printk("  hold            : %d\n", (r_usb_ept_data & 0x40000000) >> 30);
+  printk("  error_count_in  : %d\n", (r_usb_ept_data & 0x30000000) >> 28);
+  printk("  t_in            : %d\n", (r_usb_ept_data & 0x08000000) >> 27);
+  printk("  low_speed       : %d\n", (r_usb_ept_data & 0x04000000) >> 26);
+  printk("  port            : %d\n", (r_usb_ept_data & 0x03000000) >> 24);
+  printk("  error_code      : %d\n", (r_usb_ept_data & 0x00c00000) >> 22);
+  printk("  t_out           : %d\n", (r_usb_ept_data & 0x00200000) >> 21);
+  printk("  error_count_out : %d\n", (r_usb_ept_data & 0x00180000) >> 19);
+  printk("  max_len         : %d\n", (r_usb_ept_data & 0x0003f800) >> 11);
+  printk("  ep              : %d\n", (r_usb_ept_data & 0x00000780) >> 7);
+  printk("  dev             : %d\n", (r_usb_ept_data & 0x0000003f));
+}
+
+static inline void __dump_ept_data_iso(int epid)
+{
+  unsigned long flags;
+  __u32 ept_data;
+
+  if (epid < 0 || epid > 31) {
+    printk("Cannot dump ept data for invalid epid %d\n", epid);
+    return;
+  }
+
+  local_irq_save(flags);
+  *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
+  nop();
+  ept_data = *R_USB_EPT_DATA_ISO;
+  local_irq_restore(flags);
+
+  printk(" R_USB_EPT_DATA = 0x%x for epid %d :\n", ept_data, epid);
+  if (ept_data == 0) {
+    /* No need for more detailed printing. */
+    return;
+  }
+  printk("  valid           : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, valid,
+						ept_data));
+  printk("  port            : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, port,
+						ept_data));
+  printk("  error_code      : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, error_code,
+						ept_data));
+  printk("  max_len         : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, max_len,
+						ept_data));
+  printk("  ep              : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, ep,
+						ept_data));
+  printk("  dev             : %d\n", IO_EXTRACT(R_USB_EPT_DATA_ISO, dev,
+						ept_data));
+}
+
+static inline void __dump_ept_data_list(void)
+{
+  int i;
+
+  printk("Dumping the whole R_USB_EPT_DATA list\n");
+
+  for (i = 0; i < 32; i++) {
+    __dump_ept_data(i);
+  }
+}
+
+static void debug_epid(int epid) {
+  int i;
+  
+  if(epid_isoc(epid)) {
+    __dump_ept_data_iso(epid);
+  } else {
+    __dump_ept_data(epid);
+  }
+
+  printk("Bulk:\n");
+  for(i = 0; i < 32; i++) {
+    if(IO_EXTRACT(USB_EP_command, epid, TxBulkEPList[i].command) ==
+       epid) {
+      printk("%d: ", i); __dump_ep_desc(&(TxBulkEPList[i]));
+    }
+  }
+
+  printk("Ctrl:\n");
+  for(i = 0; i < 32; i++) {
+    if(IO_EXTRACT(USB_EP_command, epid, TxCtrlEPList[i].command) ==
+       epid) {
+      printk("%d: ", i); __dump_ep_desc(&(TxCtrlEPList[i]));
+    }
+  }
+
+  printk("Intr:\n");
+  for(i = 0; i < MAX_INTR_INTERVAL; i++) {
+    if(IO_EXTRACT(USB_EP_command, epid, TxIntrEPList[i].command) ==
+       epid) {
+      printk("%d: ", i); __dump_ep_desc(&(TxIntrEPList[i]));
+    }
+  }
+  
+  printk("Isoc:\n");
+  for(i = 0; i < 32; i++) {
+    if(IO_EXTRACT(USB_EP_command, epid, TxIsocEPList[i].command) ==
+       epid) {
+      printk("%d: ", i); __dump_ep_desc(&(TxIsocEPList[i]));
+    }
+  }
+
+  __dump_ept_data_list();
+  __dump_ep_list(PIPE_INTERRUPT);
+  printk("\n\n");
+}
+
+
+
+char* hcd_status_to_str(__u8 bUsbStatus) {
+  static char hcd_status_str[128];
+  hcd_status_str[0] = '\0';
+  if(bUsbStatus & IO_STATE(R_USB_STATUS, ourun, yes)) {
+    strcat(hcd_status_str, "ourun ");
+  }
+  if(bUsbStatus & IO_STATE(R_USB_STATUS, perror, yes)) {
+    strcat(hcd_status_str, "perror ");
+  }
+  if(bUsbStatus & IO_STATE(R_USB_STATUS, device_mode, yes)) {
+    strcat(hcd_status_str, "device_mode ");
+  }
+  if(bUsbStatus & IO_STATE(R_USB_STATUS, host_mode, yes)) {
+    strcat(hcd_status_str, "host_mode ");
+  }
+  if(bUsbStatus & IO_STATE(R_USB_STATUS, started, yes)) {
+    strcat(hcd_status_str, "started ");
+  }
+  if(bUsbStatus & IO_STATE(R_USB_STATUS, running, yes)) {
+    strcat(hcd_status_str, "running ");
+  }
+  return hcd_status_str;
+}
+
+
+char* sblist_to_str(struct USB_SB_Desc* sb_desc) {
+  static char sblist_to_str_buff[128];
+  char tmp[32], tmp2[32];
+  sblist_to_str_buff[0] = '\0';
+  while(sb_desc != NULL) {
+    switch(IO_EXTRACT(USB_SB_command, tt, sb_desc->command)) {
+    case 0: sprintf(tmp, "zout");  break;
+    case 1: sprintf(tmp, "in");    break;
+    case 2: sprintf(tmp, "out");   break;
+    case 3: sprintf(tmp, "setup"); break;
+    }
+    sprintf(tmp2, "(%s %d)", tmp, sb_desc->sw_len);
+    strcat(sblist_to_str_buff, tmp2);
+    if(sb_desc->next != 0) {
+      sb_desc = phys_to_virt(sb_desc->next);
+    } else {
+      sb_desc = NULL;
+    }
+  }
+  return sblist_to_str_buff;
+}
+
+char* port_status_to_str(__u16 wPortStatus) {
+  static char port_status_str[128];
+  port_status_str[0] = '\0';
+  if(wPortStatus & IO_STATE(R_USB_RH_PORT_STATUS_1, connected, yes)) {
+    strcat(port_status_str, "connected ");
+  }
+  if(wPortStatus & IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes)) {
+    strcat(port_status_str, "enabled ");
+  }
+  if(wPortStatus & IO_STATE(R_USB_RH_PORT_STATUS_1, suspended, yes)) {
+    strcat(port_status_str, "suspended ");
+  }
+  if(wPortStatus & IO_STATE(R_USB_RH_PORT_STATUS_1, reset, yes)) {
+    strcat(port_status_str, "reset ");
+  }
+  if(wPortStatus & IO_STATE(R_USB_RH_PORT_STATUS_1, speed, full)) {
+    strcat(port_status_str, "full-speed ");
+  } else {
+    strcat(port_status_str, "low-speed ");
+  }
+  return port_status_str;
+}
+
+
+char* endpoint_to_str(struct usb_endpoint_descriptor *ed) {
+  static char endpoint_to_str_buff[128];
+  char tmp[32];
+  int epnum = ed->bEndpointAddress & 0x0F;
+  int dir = ed->bEndpointAddress & 0x80;
+  int type = ed->bmAttributes & 0x03;
+  endpoint_to_str_buff[0] = '\0';
+  sprintf(endpoint_to_str_buff, "ep:%d ", epnum);
+  switch(type) {
+  case 0:
+    sprintf(tmp, " ctrl");
+    break;
+  case 1:
+    sprintf(tmp, " isoc");
+    break;
+  case 2:
+    sprintf(tmp, " bulk");
+    break;
+  case 3:
+    sprintf(tmp, " intr");
+    break;
+  }
+  strcat(endpoint_to_str_buff, tmp);
+  if(dir) {
+    sprintf(tmp, " in");
+  } else {
+    sprintf(tmp, " out");
+  }
+  strcat(endpoint_to_str_buff, tmp);
+
+  return endpoint_to_str_buff;
+}
+
+/* Debug helper functions for Transfer Controller */
+char* pipe_to_str(unsigned int pipe) {
+  static char pipe_to_str_buff[128];
+  char tmp[64];
+  sprintf(pipe_to_str_buff, "dir:%s", str_dir(pipe));
+  sprintf(tmp, " type:%s", str_type(pipe));
+  strcat(pipe_to_str_buff, tmp);
+
+  sprintf(tmp, " dev:%d", usb_pipedevice(pipe));
+  strcat(pipe_to_str_buff, tmp);
+  sprintf(tmp, " ep:%d", usb_pipeendpoint(pipe));
+  strcat(pipe_to_str_buff, tmp);
+  return pipe_to_str_buff;
+}
+
+
+#define USB_DEBUG_DESC 1
+
+#ifdef USB_DEBUG_DESC
+#define dump_in_desc(x) __dump_in_desc(x)
+#define dump_sb_desc(...) __dump_sb_desc(...)
+#define dump_ep_desc(x) __dump_ep_desc(x)
+#define dump_ept_data(x) __dump_ept_data(x)
+#else
+#define dump_in_desc(...) do {} while (0)
+#define dump_sb_desc(...) do {} while (0)
+#define dump_ep_desc(...) do {} while (0)
+#endif
+
+
+/* Uncomment this to enable massive function call trace
+   #define USB_DEBUG_TRACE */
+
+#ifdef USB_DEBUG_TRACE
+#define DBFENTER (printk(": Entering: %s\n", __FUNCTION__))
+#define DBFEXIT  (printk(": Exiting:  %s\n", __FUNCTION__))
+#else
+#define DBFENTER do {} while (0)
+#define DBFEXIT  do {} while (0)
+#endif
+
+#define CHECK_ALIGN(x) if (((__u32)(x)) & 0x00000003) \
+{panic("Alignment check (DWORD) failed at %s:%s:%d\n", __FILE__, __FUNCTION__, __LINE__);}
+
+/* Most helpful debugging aid */
+#define ASSERT(expr) ((void) ((expr) ? 0 : (err("assert failed at: %s %d",__FUNCTION__, __LINE__))))
+
+
+/***************************************************************************/
+/***************************************************************************/
+/* Forward declarations                                                    */
+/***************************************************************************/
+/***************************************************************************/
+void crisv10_hcd_epid_attn_irq(struct crisv10_irq_reg *reg);
+void crisv10_hcd_port_status_irq(struct crisv10_irq_reg *reg);
+void crisv10_hcd_ctl_status_irq(struct crisv10_irq_reg *reg);
+void crisv10_hcd_isoc_eof_irq(struct crisv10_irq_reg *reg);
+
+void rh_port_status_change(__u16[]);
+int  rh_clear_port_feature(__u8, __u16);
+int  rh_set_port_feature(__u8, __u16);
+static void rh_disable_port(unsigned int port);
+
+static void check_finished_bulk_tx_epids(struct usb_hcd *hcd,
+					 int timer);
+
+static int  tc_setup_epid(struct usb_host_endpoint *ep, struct urb *urb,
+			 int mem_flags);
+static void tc_free_epid(struct usb_host_endpoint *ep);
+static int  tc_allocate_epid(void);
+static void tc_finish_urb(struct usb_hcd *hcd, struct urb *urb, int status);
+static void tc_finish_urb_later(struct usb_hcd *hcd, struct urb *urb,
+				int status);
+
+static int  urb_priv_create(struct usb_hcd *hcd, struct urb *urb, int epid,
+			   int mem_flags);
+static void urb_priv_free(struct usb_hcd *hcd, struct urb *urb);
+
+static inline struct urb *urb_list_first(int epid);
+static inline void        urb_list_add(struct urb *urb, int epid,
+				      int mem_flags);
+static inline urb_entry_t *urb_list_entry(struct urb *urb, int epid);
+static inline void        urb_list_del(struct urb *urb, int epid);
+static inline void        urb_list_move_last(struct urb *urb, int epid);
+static inline struct urb *urb_list_next(struct urb *urb, int epid);
+
+int create_sb_for_urb(struct urb *urb, int mem_flags);
+int init_intr_urb(struct urb *urb, int mem_flags);
+
+static inline void  etrax_epid_set(__u8 index, __u32 data);
+static inline void  etrax_epid_clear_error(__u8 index);
+static inline void  etrax_epid_set_toggle(__u8 index, __u8 dirout,
+					      __u8 toggle);
+static inline __u8  etrax_epid_get_toggle(__u8 index, __u8 dirout);
+static inline __u32 etrax_epid_get(__u8 index);
+
+/* We're accessing the same register position in Etrax so
+   when we do full access the internal difference doesn't matter */
+#define etrax_epid_iso_set(index, data) etrax_epid_set(index, data)
+#define etrax_epid_iso_get(index) etrax_epid_get(index)
+
+
+static void        tc_dma_process_isoc_urb(struct urb *urb);
+static void        tc_dma_process_queue(int epid);
+static void        tc_dma_unlink_intr_urb(struct urb *urb);
+static irqreturn_t tc_dma_tx_interrupt(int irq, void *vhc);
+static irqreturn_t tc_dma_rx_interrupt(int irq, void *vhc);
+
+static void tc_bulk_start_timer_func(unsigned long dummy);
+static void tc_bulk_eot_timer_func(unsigned long dummy);
+
+
+/*************************************************************/
+/*************************************************************/
+/* Host Controler Driver block                               */
+/*************************************************************/
+/*************************************************************/
+
+/* HCD operations */
+static irqreturn_t crisv10_hcd_top_irq(int irq, void*);
+static int crisv10_hcd_reset(struct usb_hcd *);
+static int crisv10_hcd_start(struct usb_hcd *);
+static void crisv10_hcd_stop(struct usb_hcd *);
+#ifdef CONFIG_PM
+static int crisv10_hcd_suspend(struct device *, u32, u32);
+static int crisv10_hcd_resume(struct device *, u32);
+#endif /* CONFIG_PM */
+static int crisv10_hcd_get_frame(struct usb_hcd *);
+
+static int  tc_urb_enqueue(struct usb_hcd *, struct usb_host_endpoint *ep, struct urb *, gfp_t mem_flags);
+static int  tc_urb_dequeue(struct usb_hcd *, struct urb *);
+static void tc_endpoint_disable(struct usb_hcd *, struct usb_host_endpoint *ep);
+
+static int rh_status_data_request(struct usb_hcd *, char *);
+static int rh_control_request(struct usb_hcd *, u16, u16, u16, char*, u16);
+
+#ifdef CONFIG_PM
+static int crisv10_hcd_hub_suspend(struct usb_hcd *);
+static int crisv10_hcd_hub_resume(struct usb_hcd *);
+#endif /* CONFIG_PM */
+#ifdef CONFIG_USB_OTG
+static int crisv10_hcd_start_port_reset(struct usb_hcd *, unsigned);
+#endif /* CONFIG_USB_OTG */
+
+/* host controller driver interface */
+static const struct hc_driver crisv10_hc_driver = 
+  {
+    .description =	hc_name,
+    .product_desc =	product_desc,
+    .hcd_priv_size =	sizeof(struct crisv10_hcd),
+
+    /* Attaching IRQ handler manualy in probe() */
+    /* .irq =		crisv10_hcd_irq, */
+
+    .flags =		HCD_USB11,
+
+    /* called to init HCD and root hub */
+    .reset =		crisv10_hcd_reset,
+    .start =		crisv10_hcd_start,	
+
+    /* cleanly make HCD stop writing memory and doing I/O */
+    .stop =		crisv10_hcd_stop,
+
+    /* return current frame number */
+    .get_frame_number =	crisv10_hcd_get_frame,
+
+
+    /* Manage i/o requests via the Transfer Controller */
+    .urb_enqueue =	tc_urb_enqueue,
+    .urb_dequeue =	tc_urb_dequeue,
+
+    /* hw synch, freeing endpoint resources that urb_dequeue can't */
+    .endpoint_disable = tc_endpoint_disable,
+
+
+    /* Root Hub support */
+    .hub_status_data =	rh_status_data_request,
+    .hub_control =	rh_control_request,
+#ifdef CONFIG_PM
+    .hub_suspend =	rh_suspend_request,
+    .hub_resume =	rh_resume_request,
+#endif /* CONFIG_PM */
+#ifdef	CONFIG_USB_OTG
+    .start_port_reset =	crisv10_hcd_start_port_reset,
+#endif /* CONFIG_USB_OTG */
+  };
+
+
+/*
+ * conversion between pointers to a hcd and the corresponding
+ * crisv10_hcd 
+ */
+
+static inline struct crisv10_hcd *hcd_to_crisv10_hcd(struct usb_hcd *hcd)
+{
+	return (struct crisv10_hcd *) hcd->hcd_priv;
+}
+
+static inline struct usb_hcd *crisv10_hcd_to_hcd(struct crisv10_hcd *hcd)
+{
+	return container_of((void *) hcd, struct usb_hcd, hcd_priv);
+}
+
+/* check if specified port is in use */
+static inline int port_in_use(unsigned int port)
+{
+	return ports & (1 << port);
+}
+
+/* number of ports in use */
+static inline unsigned int num_ports(void)
+{
+	unsigned int i, num = 0;
+	for (i = 0; i < USB_ROOT_HUB_PORTS; i++)
+		if (port_in_use(i))
+			num++;
+	return num;
+}
+
+/* map hub port number to the port number used internally by the HC */
+static inline unsigned int map_port(unsigned int port)
+{
+  unsigned int i, num = 0;
+  for (i = 0; i < USB_ROOT_HUB_PORTS; i++)
+    if (port_in_use(i))
+      if (++num == port)
+	return i;
+  return -1;
+}
+
+/* size of descriptors in slab cache */
+#ifndef MAX
+#define MAX(x, y)		((x) > (y) ? (x) : (y))
+#endif
+
+
+/******************************************************************/
+/* Hardware Interrupt functions                                   */
+/******************************************************************/
+
+/* Fast interrupt handler for HC */
+static irqreturn_t crisv10_hcd_top_irq(int irq, void *vcd)
+{
+  struct usb_hcd *hcd = vcd;
+  struct crisv10_irq_reg reg;
+  __u32 irq_mask;
+  unsigned long flags;
+
+  DBFENTER;
+
+  ASSERT(hcd != NULL);
+  reg.hcd = hcd;
+
+  /* Turn of other interrupts while handling these sensitive cases */
+  local_irq_save(flags);
+  
+  /* Read out which interrupts that are flaged */
+  irq_mask = *R_USB_IRQ_MASK_READ;
+  reg.r_usb_irq_mask_read = irq_mask;
+
+  /* Reading R_USB_STATUS clears the ctl_status interrupt. Note that
+     R_USB_STATUS must be read before R_USB_EPID_ATTN since reading the latter
+     clears the ourun and perror fields of R_USB_STATUS. */
+  reg.r_usb_status = *R_USB_STATUS;
+  
+  /* Reading R_USB_EPID_ATTN clears the iso_eof, bulk_eot and epid_attn
+     interrupts. */
+  reg.r_usb_epid_attn = *R_USB_EPID_ATTN;
+  
+  /* Reading R_USB_RH_PORT_STATUS_1 and R_USB_RH_PORT_STATUS_2 clears the
+     port_status interrupt. */
+  reg.r_usb_rh_port_status_1 = *R_USB_RH_PORT_STATUS_1;
+  reg.r_usb_rh_port_status_2 = *R_USB_RH_PORT_STATUS_2;
+  
+  /* Reading R_USB_FM_NUMBER clears the sof interrupt. */
+  /* Note: the lower 11 bits contain the actual frame number, sent with each
+     sof. */
+  reg.r_usb_fm_number = *R_USB_FM_NUMBER;
+
+  /* Interrupts are handled in order of priority. */
+  if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, port_status)) {
+    crisv10_hcd_port_status_irq(&reg);
+  }
+  if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, epid_attn)) {
+    crisv10_hcd_epid_attn_irq(&reg);
+  }
+  if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, ctl_status)) {
+    crisv10_hcd_ctl_status_irq(&reg);
+  }
+  if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, iso_eof)) {
+    crisv10_hcd_isoc_eof_irq(&reg);
+  }
+  if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, bulk_eot)) {
+    /* Update/restart the bulk start timer since obviously the channel is
+       running. */
+    mod_timer(&bulk_start_timer, jiffies + BULK_START_TIMER_INTERVAL);
+    /* Update/restart the bulk eot timer since we just received an bulk eot
+       interrupt. */
+    mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL);
+
+    /* Check for finished bulk transfers on epids */
+    check_finished_bulk_tx_epids(hcd, 0);
+  }
+  local_irq_restore(flags);
+
+  DBFEXIT;
+  return IRQ_HANDLED;
+}
+
+
+void crisv10_hcd_epid_attn_irq(struct crisv10_irq_reg *reg) {
+  struct usb_hcd *hcd = reg->hcd;
+  struct crisv10_urb_priv *urb_priv;
+  int epid;
+  DBFENTER;
+
+  for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
+    if (test_bit(epid, (void *)&reg->r_usb_epid_attn)) {
+      struct urb *urb;
+      __u32 ept_data;
+      int error_code;
+
+      if (epid == DUMMY_EPID || epid == INVALID_EPID) {
+	/* We definitely don't care about these ones. Besides, they are
+	   always disabled, so any possible disabling caused by the
+	   epid attention interrupt is irrelevant. */
+	warn("Got epid_attn for INVALID_EPID or DUMMY_EPID (%d).", epid);
+	continue;
+      }
+
+      if(!epid_inuse(epid)) {
+	irq_err("Epid attention on epid:%d that isn't in use\n", epid);
+	printk("R_USB_STATUS: 0x%x\n", reg->r_usb_status);
+	debug_epid(epid);
+	continue;
+      }
+
+      /* Note that although there are separate R_USB_EPT_DATA and
+	 R_USB_EPT_DATA_ISO registers, they are located at the same address and
+	 are of the same size. In other words, this read should be ok for isoc
+	 also. */
+      ept_data = etrax_epid_get(epid);
+      error_code = IO_EXTRACT(R_USB_EPT_DATA, error_code, ept_data);
+
+      /* Get the active URB for this epid. We blatantly assume
+	 that only this URB could have caused the epid attention. */
+      urb = activeUrbList[epid];
+      if (urb == NULL) {
+	irq_err("Attention on epid:%d error:%d with no active URB.\n",
+		epid, error_code);
+	printk("R_USB_STATUS: 0x%x\n", reg->r_usb_status);
+	debug_epid(epid);
+	continue;
+      }
+
+      urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+      ASSERT(urb_priv);
+
+      /* Using IO_STATE_VALUE on R_USB_EPT_DATA should be ok for isoc also. */
+      if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) {
+
+	/* Isoc traffic doesn't have error_count_in/error_count_out. */
+	if ((usb_pipetype(urb->pipe) != PIPE_ISOCHRONOUS) &&
+	    (IO_EXTRACT(R_USB_EPT_DATA, error_count_in, ept_data) == 3 ||
+	     IO_EXTRACT(R_USB_EPT_DATA, error_count_out, ept_data) == 3)) {
+	  /* Check if URB allready is marked for late-finish, we can get
+	     several 3rd error for Intr traffic when a device is unplugged */
+	  if(urb_priv->later_data == NULL) {
+	    /* 3rd error. */
+	    irq_warn("3rd error for epid:%d (%s %s) URB:0x%x[%d]\n", epid,
+		     str_dir(urb->pipe), str_type(urb->pipe),
+		     (unsigned int)urb, urb_priv->urb_num);
+	  
+	    tc_finish_urb_later(hcd, urb, -EPROTO);
+	  }
+
+	} else if (reg->r_usb_status & IO_MASK(R_USB_STATUS, perror)) {
+	  irq_warn("Perror for epid:%d\n", epid);
+	  printk("FM_NUMBER: %d\n", reg->r_usb_fm_number & 0x7ff);
+	  printk("R_USB_STATUS: 0x%x\n", reg->r_usb_status);
+	  __dump_urb(urb);
+	  debug_epid(epid);
+
+	  if (!(ept_data & IO_MASK(R_USB_EPT_DATA, valid))) {
+	    /* invalid ep_id */
+	    panic("Perror because of invalid epid."
+		  " Deconfigured too early?");
+	  } else {
+	    /* past eof1, near eof, zout transfer, setup transfer */
+	    /* Dump the urb and the relevant EP descriptor. */
+	    panic("Something wrong with DMA descriptor contents."
+		  " Too much traffic inserted?");
+	  }
+	} else if (reg->r_usb_status & IO_MASK(R_USB_STATUS, ourun)) {
+	  /* buffer ourun */
+	  printk("FM_NUMBER: %d\n", reg->r_usb_fm_number & 0x7ff);
+	  printk("R_USB_STATUS: 0x%x\n", reg->r_usb_status);
+	  __dump_urb(urb);
+	  debug_epid(epid);
+
+	  panic("Buffer overrun/underrun for epid:%d. DMA too busy?", epid);
+	} else {
+	  irq_warn("Attention on epid:%d (%s %s) with no error code\n", epid,
+		   str_dir(urb->pipe), str_type(urb->pipe));
+	  printk("R_USB_STATUS: 0x%x\n", reg->r_usb_status);
+	  __dump_urb(urb);
+	  debug_epid(epid);
+	}
+
+      } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code,
+					      stall)) {
+	/* Not really a protocol error, just says that the endpoint gave
+	   a stall response. Note that error_code cannot be stall for isoc. */
+	if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
+	  panic("Isoc traffic cannot stall");
+	}
+
+	tc_dbg("Stall for epid:%d (%s %s) URB:0x%x\n", epid,
+	       str_dir(urb->pipe), str_type(urb->pipe), (unsigned int)urb);
+	tc_finish_urb(hcd, urb, -EPIPE);
+
+      } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code,
+					      bus_error)) {
+	/* Two devices responded to a transaction request. Must be resolved
+	   by software. FIXME: Reset ports? */
+	panic("Bus error for epid %d."
+	      " Two devices responded to transaction request\n",
+	      epid);
+
+      } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code,
+					      buffer_error)) {
+	/* DMA overrun or underrun. */
+	irq_warn("Buffer overrun/underrun for epid:%d (%s %s)\n", epid,
+		 str_dir(urb->pipe), str_type(urb->pipe));
+
+	/* It seems that error_code = buffer_error in
+	   R_USB_EPT_DATA/R_USB_EPT_DATA_ISO and ourun = yes in R_USB_STATUS
+	   are the same error. */
+	tc_finish_urb(hcd, urb, -EPROTO);
+      } else {
+	  irq_warn("Unknown attention on epid:%d (%s %s)\n", epid,
+		   str_dir(urb->pipe), str_type(urb->pipe));
+	  dump_ept_data(epid);
+      }
+    }
+  }
+  DBFEXIT;
+}
+
+void crisv10_hcd_port_status_irq(struct crisv10_irq_reg *reg)
+{
+  __u16 port_reg[USB_ROOT_HUB_PORTS];
+  DBFENTER;
+  port_reg[0] = reg->r_usb_rh_port_status_1;
+  port_reg[1] = reg->r_usb_rh_port_status_2;
+  rh_port_status_change(port_reg);
+  DBFEXIT;
+}
+
+void crisv10_hcd_isoc_eof_irq(struct crisv10_irq_reg *reg)
+{
+  int epid;
+  struct urb *urb;
+  struct crisv10_urb_priv *urb_priv;
+
+  DBFENTER;
+
+  for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) {
+
+    /* Only check epids that are in use, is valid and has SB list */
+    if (!epid_inuse(epid) || epid == INVALID_EPID ||
+	TxIsocEPList[epid].sub == 0 || epid == DUMMY_EPID) {
+      /* Nothing here to see. */
+      continue;
+    }
+    ASSERT(epid_isoc(epid));
+
+    /* Get the active URB for this epid (if any). */
+    urb = activeUrbList[epid];
+    if (urb == 0) {
+      isoc_warn("Ignoring NULL urb for epid:%d\n", epid);
+      continue;
+    }
+    if(!epid_out_traffic(epid)) {
+      /* Sanity check. */
+      ASSERT(usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS);
+
+      urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+      ASSERT(urb_priv);
+
+      if (urb_priv->urb_state == NOT_STARTED) {
+	/* If ASAP is not set and urb->start_frame is the current frame,
+	   start the transfer. */
+	if (!(urb->transfer_flags & URB_ISO_ASAP) &&
+	    (urb->start_frame == (*R_USB_FM_NUMBER & 0x7ff))) {
+	  /* EP should not be enabled if we're waiting for start_frame */
+	  ASSERT((TxIsocEPList[epid].command &
+		  IO_STATE(USB_EP_command, enable, yes)) == 0);
+
+	  isoc_warn("Enabling isoc IN EP descr for epid %d\n", epid);
+	  TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
+
+	  /* This urb is now active. */
+	  urb_priv->urb_state = STARTED;
+	  continue;
+	}
+      }
+    }
+  }
+
+  DBFEXIT;
+}
+
+void crisv10_hcd_ctl_status_irq(struct crisv10_irq_reg *reg)
+{
+  struct crisv10_hcd* crisv10_hcd = hcd_to_crisv10_hcd(reg->hcd);
+
+  DBFENTER;
+  ASSERT(crisv10_hcd);
+
+  irq_dbg("ctr_status_irq, controller status: %s\n",
+	  hcd_status_to_str(reg->r_usb_status));
+  
+  /* FIXME: What should we do if we get ourun or perror? Dump the EP and SB
+     list for the corresponding epid? */
+  if (reg->r_usb_status & IO_MASK(R_USB_STATUS, ourun)) {
+    panic("USB controller got ourun.");
+  }
+  if (reg->r_usb_status & IO_MASK(R_USB_STATUS, perror)) {
+    
+    /* Before, etrax_usb_do_intr_recover was called on this epid if it was
+       an interrupt pipe. I don't see how re-enabling all EP descriptors
+       will help if there was a programming error. */
+    panic("USB controller got perror.");
+  }
+
+  /* Keep track of USB Controller, if it's running or not */
+  if(reg->r_usb_status & IO_STATE(R_USB_STATUS, running, yes)) {
+    crisv10_hcd->running = 1;
+  } else {
+    crisv10_hcd->running = 0;
+  }
+  
+  if (reg->r_usb_status & IO_MASK(R_USB_STATUS, device_mode)) {
+    /* We should never operate in device mode. */
+    panic("USB controller in device mode.");
+  }
+
+  /* Set the flag to avoid getting "Unlink after no-IRQ? Controller is probably
+     using the wrong IRQ" from hcd_unlink_urb() in drivers/usb/core/hcd.c */
+  set_bit(HCD_FLAG_SAW_IRQ, &reg->hcd->flags);
+  
+  DBFEXIT;
+}
+
+
+/******************************************************************/
+/* Host Controller interface functions                            */
+/******************************************************************/
+
+static inline void crisv10_ready_wait(void) {
+  volatile int timeout = 10000;
+  /* Check the busy bit of USB controller in Etrax */
+  while((*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)) &&
+	(timeout-- > 0));
+  if(timeout == 0) {
+    warn("Timeout while waiting for USB controller to be idle\n");
+  }
+}
+
+/* reset host controller */
+static int crisv10_hcd_reset(struct usb_hcd *hcd)
+{
+  DBFENTER;
+  hcd_dbg(hcd, "reset\n");
+
+
+  /* Reset the USB interface. */
+  /*
+  *R_USB_COMMAND =
+    IO_STATE(R_USB_COMMAND, port_sel, nop) |
+    IO_STATE(R_USB_COMMAND, port_cmd, reset) |
+    IO_STATE(R_USB_COMMAND, ctrl_cmd, reset);
+  nop();
+  */
+  DBFEXIT;
+  return 0;
+}
+
+/* start host controller */
+static int crisv10_hcd_start(struct usb_hcd *hcd)
+{
+  DBFENTER;
+  hcd_dbg(hcd, "start\n");
+
+  crisv10_ready_wait();
+
+  /* Start processing of USB traffic. */
+  *R_USB_COMMAND =
+    IO_STATE(R_USB_COMMAND, port_sel, nop) |
+    IO_STATE(R_USB_COMMAND, port_cmd, reset) |
+    IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run);
+
+  nop();
+
+  hcd->state = HC_STATE_RUNNING;
+
+  DBFEXIT;
+  return 0;
+}
+
+/* stop host controller */
+static void crisv10_hcd_stop(struct usb_hcd *hcd)
+{
+  DBFENTER;
+  hcd_dbg(hcd, "stop\n");
+  crisv10_hcd_reset(hcd);
+  DBFEXIT;
+}
+
+/* return the current frame number */
+static int crisv10_hcd_get_frame(struct usb_hcd *hcd)
+{
+  DBFENTER;
+  DBFEXIT;
+  return (*R_USB_FM_NUMBER & 0x7ff);
+}
+
+#ifdef	CONFIG_USB_OTG
+
+static int crisv10_hcd_start_port_reset(struct usb_hcd *hcd, unsigned port)
+{
+  return 0; /* no-op for now */
+}
+
+#endif /* CONFIG_USB_OTG */
+
+
+/******************************************************************/
+/* Root Hub functions                                             */
+/******************************************************************/
+
+/* root hub status */
+static const struct usb_hub_status rh_hub_status = 
+  {
+    .wHubStatus =		0,
+    .wHubChange =		0,
+  };
+
+/* root hub descriptor */
+static const u8 rh_hub_descr[] =
+  {
+    0x09,			/* bDescLength	       */
+    0x29,			/* bDescriptorType     */
+    USB_ROOT_HUB_PORTS,         /* bNbrPorts	       */
+    0x00,			/* wHubCharacteristics */
+    0x00,		 
+    0x01,			/* bPwrOn2pwrGood      */
+    0x00,			/* bHubContrCurrent    */
+    0x00,			/* DeviceRemovable     */
+    0xff			/* PortPwrCtrlMask     */
+  };
+
+/* Actual holder of root hub status*/
+struct crisv10_rh rh;
+
+/* Initialize root hub data structures (called from dvdrv_hcd_probe()) */
+int rh_init(void) {
+  int i;
+  /* Reset port status flags */
+  for (i = 0; i < USB_ROOT_HUB_PORTS; i++) {
+    rh.wPortChange[i] = 0;
+    rh.wPortStatusPrev[i] = 0;
+  }
+  return 0;
+}
+
+#define RH_FEAT_MASK ((1<<USB_PORT_FEAT_CONNECTION)|\
+		      (1<<USB_PORT_FEAT_ENABLE)|\
+		      (1<<USB_PORT_FEAT_SUSPEND)|\
+		      (1<<USB_PORT_FEAT_RESET))
+
+/* Handle port status change interrupt (called from bottom part interrupt) */
+void rh_port_status_change(__u16 port_reg[]) {
+  int i;
+  __u16 wChange;
+
+  for(i = 0; i < USB_ROOT_HUB_PORTS; i++) {
+    /* Xor out changes since last read, masked for important flags */
+    wChange = (port_reg[i] & RH_FEAT_MASK) ^ rh.wPortStatusPrev[i];
+    /* Or changes together with (if any) saved changes */
+    rh.wPortChange[i] |= wChange;
+    /* Save new status */
+    rh.wPortStatusPrev[i] = port_reg[i];
+
+    if(wChange) {
+      rh_dbg("Interrupt port_status change port%d: %s  Current-status:%s\n", i+1,
+	     port_status_to_str(wChange),
+	     port_status_to_str(port_reg[i]));
+    }
+  }
+}
+
+/* Construct port status change bitmap for the root hub */
+static int rh_status_data_request(struct usb_hcd *hcd, char *buf)
+{
+  struct crisv10_hcd* crisv10_hcd = hcd_to_crisv10_hcd(hcd);
+  unsigned int i;
+
+  DBFENTER;
+  /*
+   * corresponds to hub status change EP (USB 2.0 spec section 11.13.4)
+   * return bitmap indicating ports with status change
+   */
+  *buf = 0;
+  spin_lock(&crisv10_hcd->lock);
+  for (i = 1; i <= crisv10_hcd->num_ports; i++) {
+    if (rh.wPortChange[map_port(i)]) {
+      *buf |= (1 << i);
+      rh_dbg("rh_status_data_request, change on port %d: %s  Current Status: %s\n", i,
+	     port_status_to_str(rh.wPortChange[map_port(i)]),
+	     port_status_to_str(rh.wPortStatusPrev[map_port(i)]));
+    }
+  }
+  spin_unlock(&crisv10_hcd->lock);
+  DBFEXIT;
+  return *buf == 0 ? 0 : 1;
+}
+
+/* Handle a control request for the root hub (called from hcd_driver) */
+static int rh_control_request(struct usb_hcd *hcd, 
+			      u16 typeReq, 
+			      u16 wValue, 
+			      u16 wIndex,
+			      char *buf, 
+			      u16 wLength) {
+
+  struct crisv10_hcd *crisv10_hcd = hcd_to_crisv10_hcd(hcd);
+  int retval = 0;
+  int len;
+  DBFENTER;
+
+  switch (typeReq) {
+  case GetHubDescriptor:
+    rh_dbg("GetHubDescriptor\n");
+    len = min_t(unsigned int, sizeof rh_hub_descr, wLength);
+    memcpy(buf, rh_hub_descr, len);
+    buf[2] = crisv10_hcd->num_ports;
+    break;
+  case GetHubStatus:
+    rh_dbg("GetHubStatus\n");
+    len = min_t(unsigned int, sizeof rh_hub_status, wLength);
+    memcpy(buf, &rh_hub_status, len);
+    break;
+  case GetPortStatus:
+    if (!wIndex || wIndex > crisv10_hcd->num_ports)
+      goto error;
+    rh_dbg("GetportStatus, port:%d change:%s  status:%s\n", wIndex,
+	   port_status_to_str(rh.wPortChange[map_port(wIndex)]),
+	   port_status_to_str(rh.wPortStatusPrev[map_port(wIndex)]));
+    *(u16 *) buf = cpu_to_le16(rh.wPortStatusPrev[map_port(wIndex)]);
+    *(u16 *) (buf + 2) = cpu_to_le16(rh.wPortChange[map_port(wIndex)]);
+    break;
+  case SetHubFeature:
+    rh_dbg("SetHubFeature\n");
+  case ClearHubFeature:
+    rh_dbg("ClearHubFeature\n");
+    switch (wValue) {
+    case C_HUB_OVER_CURRENT:
+    case C_HUB_LOCAL_POWER:
+      rh_warn("Not implemented hub request:%d \n", typeReq);
+      /* not implemented */
+      break;
+    default:
+      goto error;
+    }
+    break;
+  case SetPortFeature:
+    if (!wIndex || wIndex > crisv10_hcd->num_ports)
+      goto error;
+    if(rh_set_port_feature(map_port(wIndex), wValue))
+      goto error;
+    break;
+  case ClearPortFeature:
+    if (!wIndex || wIndex > crisv10_hcd->num_ports)
+      goto error;
+    if(rh_clear_port_feature(map_port(wIndex), wValue))
+      goto error;
+    break;
+  default:
+    rh_warn("Unknown hub request: %d\n", typeReq);
+  error:
+    retval = -EPIPE;
+  }
+  DBFEXIT;
+  return retval;
+}
+
+int rh_set_port_feature(__u8 bPort, __u16 wFeature) {
+  __u8 bUsbCommand = 0;
+  switch(wFeature) {
+  case USB_PORT_FEAT_RESET:
+    rh_dbg("SetPortFeature: reset\n");
+    bUsbCommand |= IO_STATE(R_USB_COMMAND, port_cmd, reset);
+    goto set;
+    break;
+  case USB_PORT_FEAT_SUSPEND:
+    rh_dbg("SetPortFeature: suspend\n");
+    bUsbCommand |= IO_STATE(R_USB_COMMAND, port_cmd, suspend);
+    goto set;
+    break;
+  case USB_PORT_FEAT_POWER:
+    rh_dbg("SetPortFeature: power\n");
+    break;
+  case USB_PORT_FEAT_C_CONNECTION:
+    rh_dbg("SetPortFeature: c_connection\n");
+    break;
+  case USB_PORT_FEAT_C_RESET:
+    rh_dbg("SetPortFeature: c_reset\n");
+    break;
+  case USB_PORT_FEAT_C_OVER_CURRENT:
+    rh_dbg("SetPortFeature: c_over_current\n");
+    break;
+
+  set:
+    /* Select which port via the port_sel field */
+    bUsbCommand |= IO_FIELD(R_USB_COMMAND, port_sel, bPort+1);
+
+    /* Make sure the controller isn't busy. */
+    crisv10_ready_wait();
+    /* Send out the actual command to the USB controller */
+    *R_USB_COMMAND = bUsbCommand;
+
+    /* If port reset then also bring USB controller into running state */
+    if(wFeature == USB_PORT_FEAT_RESET) {
+      /* Wait a while for controller to first become started after port reset */
+      udelay(12000); /* 12ms blocking wait */
+      
+      /* Make sure the controller isn't busy. */
+      crisv10_ready_wait();
+
+      /* If all enabled ports were disabled the host controller goes down into
+	 started mode, so we need to bring it back into the running state.
+	 (This is safe even if it's already in the running state.) */
+      *R_USB_COMMAND =
+	IO_STATE(R_USB_COMMAND, port_sel, nop) |
+	IO_STATE(R_USB_COMMAND, port_cmd, reset) |
+	IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run);
+    }
+
+    break;
+  default:
+    rh_dbg("SetPortFeature: unknown feature\n");
+    return -1;
+  }
+  return 0;
+}
+
+int rh_clear_port_feature(__u8 bPort, __u16 wFeature) {
+  switch(wFeature) {
+  case USB_PORT_FEAT_ENABLE:
+    rh_dbg("ClearPortFeature: enable\n");
+    rh_disable_port(bPort);
+    break;
+  case USB_PORT_FEAT_SUSPEND:
+    rh_dbg("ClearPortFeature: suspend\n");
+    break;
+  case USB_PORT_FEAT_POWER:
+    rh_dbg("ClearPortFeature: power\n");
+    break;
+
+  case USB_PORT_FEAT_C_ENABLE:
+    rh_dbg("ClearPortFeature: c_enable\n");
+    goto clear;
+  case USB_PORT_FEAT_C_SUSPEND:
+    rh_dbg("ClearPortFeature: c_suspend\n");
+    goto clear;
+  case USB_PORT_FEAT_C_CONNECTION:
+    rh_dbg("ClearPortFeature: c_connection\n");
+    goto clear;
+  case USB_PORT_FEAT_C_OVER_CURRENT:
+    rh_dbg("ClearPortFeature: c_over_current\n");
+    goto clear;
+  case USB_PORT_FEAT_C_RESET:
+    rh_dbg("ClearPortFeature: c_reset\n");
+    goto clear;
+  clear:
+    rh.wPortChange[bPort] &= ~(1 << (wFeature - 16));
+    break;
+  default:
+    rh_dbg("ClearPortFeature: unknown feature\n");
+    return -1;
+  }
+  return 0;
+}
+
+
+#ifdef	CONFIG_PM
+/* Handle a suspend request for the root hub (called from hcd_driver) */
+static int rh_suspend_request(struct usb_hcd *hcd)
+{
+  return 0; /* no-op for now */
+}
+
+/* Handle a resume request for the root hub (called from hcd_driver) */
+static int rh_resume_request(struct usb_hcd *hcd)
+{
+  return 0; /* no-op for now */
+}
+#endif /* CONFIG_PM */
+
+
+
+/* Wrapper function for workaround port disable registers in USB controller  */
+static void rh_disable_port(unsigned int port) {
+  volatile int timeout = 10000;
+  volatile char* usb_portx_disable;
+  switch(port) {
+  case 0:
+    usb_portx_disable = R_USB_PORT1_DISABLE;
+    break;
+  case 1:
+    usb_portx_disable = R_USB_PORT2_DISABLE;
+    break;
+  default:
+    /* Invalid port index */
+    return;
+  }
+  /* Set disable flag in special register  */
+  *usb_portx_disable = IO_STATE(R_USB_PORT1_DISABLE, disable, yes);
+  /* Wait until not enabled anymore */
+  while((rh.wPortStatusPrev[port] &
+	IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes)) &&
+	(timeout-- > 0));
+  if(timeout == 0) {
+    warn("Timeout while waiting for port %d to become disabled\n", port);
+  }
+  /* clear disable flag in special register  */
+  *usb_portx_disable = IO_STATE(R_USB_PORT1_DISABLE, disable, no);
+  rh_info("Physical port %d disabled\n", port+1);
+}
+
+
+/******************************************************************/
+/* Transfer Controller (TC) functions                             */
+/******************************************************************/
+
+/* FIXME: Should RX_BUF_SIZE be a config option, or maybe we should adjust it
+   dynamically?
+   To adjust it dynamically we would have to get an interrupt when we reach
+   the end of the rx descriptor list, or when we get close to the end, and
+   then allocate more descriptors. */
+#define NBR_OF_RX_DESC     512
+#define RX_DESC_BUF_SIZE   1024
+#define RX_BUF_SIZE        (NBR_OF_RX_DESC * RX_DESC_BUF_SIZE)
+
+
+/* Local variables for Transfer Controller */
+/* --------------------------------------- */
+
+/* This is a circular (double-linked) list of the active urbs for each epid.
+   The head is never removed, and new urbs are linked onto the list as
+   urb_entry_t elements. Don't reference urb_list directly; use the wrapper
+   functions instead (which includes spin_locks) */
+static struct list_head urb_list[NBR_OF_EPIDS];
+
+/* Read about the need and usage of this lock in submit_ctrl_urb. */
+/* Lock for URB lists for each EPID */
+static spinlock_t urb_list_lock;
+
+/* Lock for EPID array register (R_USB_EPT_x) in Etrax */
+static spinlock_t etrax_epid_lock;
+
+/* Lock for dma8 sub0 handling */
+static spinlock_t etrax_dma8_sub0_lock;
+
+/* DMA IN cache bug. Align the DMA IN buffers to 32 bytes, i.e. a cache line.
+   Since RX_DESC_BUF_SIZE is 1024 is a multiple of 32, all rx buffers will be
+   cache aligned. */
+static volatile unsigned char RxBuf[RX_BUF_SIZE] __attribute__ ((aligned (32)));
+static volatile struct USB_IN_Desc RxDescList[NBR_OF_RX_DESC] __attribute__ ((aligned (4)));
+
+/* Pointers into RxDescList. */
+static volatile struct USB_IN_Desc *myNextRxDesc;
+static volatile struct USB_IN_Desc *myLastRxDesc;
+
+/* A zout transfer makes a memory access at the address of its buf pointer,
+   which means that setting this buf pointer to 0 will cause an access to the
+   flash. In addition to this, setting sw_len to 0 results in a 16/32 bytes
+   (depending on DMA burst size) transfer.
+   Instead, we set it to 1, and point it to this buffer. */
+static int zout_buffer[4] __attribute__ ((aligned (4)));
+
+/* Cache for allocating new EP and SB descriptors. */
+static kmem_cache_t *usb_desc_cache;
+
+/* Cache for the data allocated in the isoc descr top half. */
+static kmem_cache_t *isoc_compl_cache;
+
+/* Cache for the data allocated when delayed finishing of URBs */
+static kmem_cache_t *later_data_cache;
+
+
+/* Counter to keep track of how many Isoc EP we have sat up. Used to enable
+   and disable iso_eof interrupt. We only need these interrupts when we have
+   Isoc data endpoints (consumes CPU cycles).
+   FIXME: This could be more fine granular, so this interrupt is only enabled
+   when we have a In Isoc URB not URB_ISO_ASAP flaged queued. */
+static int isoc_epid_counter;
+
+/* Protecting wrapper functions for R_USB_EPT_x */
+/* -------------------------------------------- */
+static inline void etrax_epid_set(__u8 index, __u32 data) {
+  unsigned long flags;
+  spin_lock_irqsave(&etrax_epid_lock, flags);
+  *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, index);
+  nop();
+  *R_USB_EPT_DATA = data;
+  spin_unlock_irqrestore(&etrax_epid_lock, flags);
+}
+
+static inline void etrax_epid_clear_error(__u8 index) {
+  unsigned long flags;
+  spin_lock_irqsave(&etrax_epid_lock, flags);
+  *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, index);
+  nop();
+  *R_USB_EPT_DATA &=
+    ~(IO_MASK(R_USB_EPT_DATA, error_count_in) |
+      IO_MASK(R_USB_EPT_DATA, error_count_out) |
+      IO_MASK(R_USB_EPT_DATA, error_code));
+  spin_unlock_irqrestore(&etrax_epid_lock, flags);
+}
+
+static inline void etrax_epid_set_toggle(__u8 index, __u8 dirout,
+                                             __u8 toggle) {
+  unsigned long flags;
+  spin_lock_irqsave(&etrax_epid_lock, flags);
+  *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, index);
+  nop();
+  if(dirout) {
+    *R_USB_EPT_DATA &= ~IO_MASK(R_USB_EPT_DATA, t_out);
+    *R_USB_EPT_DATA |= IO_FIELD(R_USB_EPT_DATA, t_out, toggle);
+  } else {
+    *R_USB_EPT_DATA &= ~IO_MASK(R_USB_EPT_DATA, t_in);
+    *R_USB_EPT_DATA |= IO_FIELD(R_USB_EPT_DATA, t_in, toggle);
+  }
+  spin_unlock_irqrestore(&etrax_epid_lock, flags);
+}
+
+static inline __u8 etrax_epid_get_toggle(__u8 index, __u8 dirout) {
+  unsigned long flags;
+  __u8 toggle;
+  spin_lock_irqsave(&etrax_epid_lock, flags);
+  *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, index);
+  nop();
+  if (dirout) {
+    toggle = IO_EXTRACT(R_USB_EPT_DATA, t_out, *R_USB_EPT_DATA);
+  } else {
+    toggle = IO_EXTRACT(R_USB_EPT_DATA, t_in, *R_USB_EPT_DATA);
+  }
+  spin_unlock_irqrestore(&etrax_epid_lock, flags);
+  return toggle;
+}
+
+
+static inline __u32 etrax_epid_get(__u8 index) {
+  unsigned long flags;
+  __u32 data;
+  spin_lock_irqsave(&etrax_epid_lock, flags);
+  *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, index);
+  nop();
+  data = *R_USB_EPT_DATA;
+  spin_unlock_irqrestore(&etrax_epid_lock, flags);
+  return data;
+}
+
+
+
+
+/* Main functions for Transfer Controller */
+/* -------------------------------------- */
+
+/* Init structs, memories and lists used by Transfer Controller */
+int tc_init(struct usb_hcd *hcd) {
+  int i;
+  /* Clear software state info for all epids */
+  memset(epid_state, 0, sizeof(struct etrax_epid) * NBR_OF_EPIDS);
+
+  /* Set Invalid and Dummy as being in use and disabled */
+  epid_state[INVALID_EPID].inuse = 1;
+  epid_state[DUMMY_EPID].inuse = 1;
+  epid_state[INVALID_EPID].disabled = 1;
+  epid_state[DUMMY_EPID].disabled = 1;
+
+  /* Clear counter for how many Isoc epids we have sat up */
+  isoc_epid_counter = 0;
+
+  /* Initialize the urb list by initiating a head for each list.
+     Also reset list hodling active URB for each epid */
+  for (i = 0; i < NBR_OF_EPIDS; i++) {
+    INIT_LIST_HEAD(&urb_list[i]);
+    activeUrbList[i] = NULL;
+  }
+
+  /* Init lock for URB lists */
+  spin_lock_init(&urb_list_lock);
+  /* Init lock for Etrax R_USB_EPT register */
+  spin_lock_init(&etrax_epid_lock);
+  /* Init lock for Etrax dma8 sub0 handling */
+  spin_lock_init(&etrax_dma8_sub0_lock);
+
+  /* We use kmem_cache_* to make sure that all DMA desc. are dword aligned */
+
+  /* Note that we specify sizeof(struct USB_EP_Desc) as the size, but also
+     allocate SB descriptors from this cache. This is ok since
+     sizeof(struct USB_EP_Desc) == sizeof(struct USB_SB_Desc). */
+  usb_desc_cache = kmem_cache_create("usb_desc_cache",
+				     sizeof(struct USB_EP_Desc), 0,
+				     SLAB_HWCACHE_ALIGN, 0, 0);
+  if(usb_desc_cache == NULL) {
+    return -ENOMEM;
+  }
+
+  /* Create slab cache for speedy allocation of memory for isoc bottom-half
+     interrupt handling */
+  isoc_compl_cache =
+    kmem_cache_create("isoc_compl_cache",
+		      sizeof(struct crisv10_isoc_complete_data),
+		      0, SLAB_HWCACHE_ALIGN, 0, 0);
+  if(isoc_compl_cache == NULL) {
+    return -ENOMEM;
+  }
+
+  /* Create slab cache for speedy allocation of memory for later URB finish
+     struct */
+  later_data_cache =
+    kmem_cache_create("later_data_cache",
+		      sizeof(struct urb_later_data),
+		      0, SLAB_HWCACHE_ALIGN, 0, 0);
+  if(later_data_cache == NULL) {
+    return -ENOMEM;
+  }
+
+
+  /* Initiate the bulk start timer. */
+  init_timer(&bulk_start_timer);
+  bulk_start_timer.expires = jiffies + BULK_START_TIMER_INTERVAL;
+  bulk_start_timer.function = tc_bulk_start_timer_func;
+  add_timer(&bulk_start_timer);
+
+
+  /* Initiate the bulk eot timer. */
+  init_timer(&bulk_eot_timer);
+  bulk_eot_timer.expires = jiffies + BULK_EOT_TIMER_INTERVAL;
+  bulk_eot_timer.function = tc_bulk_eot_timer_func;
+  bulk_eot_timer.data = (unsigned long)hcd;
+  add_timer(&bulk_eot_timer);
+
+  return 0;
+}
+
+/* Uninitialize all resources used by Transfer Controller */
+void tc_destroy(void) {
+
+  /* Destroy all slab cache */
+  kmem_cache_destroy(usb_desc_cache);
+  kmem_cache_destroy(isoc_compl_cache);
+  kmem_cache_destroy(later_data_cache);
+
+  /* Remove timers */
+  del_timer(&bulk_start_timer);
+  del_timer(&bulk_eot_timer);
+}
+
+static void restart_dma8_sub0(void) {
+  unsigned long flags;
+  spin_lock_irqsave(&etrax_dma8_sub0_lock, flags);
+  /* Verify that the dma is not running */
+  if ((*R_DMA_CH8_SUB0_CMD & IO_MASK(R_DMA_CH8_SUB0_CMD, cmd)) == 0) {
+    struct USB_EP_Desc *ep = (struct USB_EP_Desc *)phys_to_virt(*R_DMA_CH8_SUB0_EP);
+    while (DUMMY_EPID == IO_EXTRACT(USB_EP_command, epid, ep->command)) {
+      ep = (struct USB_EP_Desc *)phys_to_virt(ep->next);
+    }
+    /* Advance the DMA to the next EP descriptor that is not a DUMMY_EPID.
+     * ep->next is already a physical address; no need for a virt_to_phys. */
+    *R_DMA_CH8_SUB0_EP = ep->next;
+    /* Restart the DMA */
+    *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start);
+  }
+  spin_unlock_irqrestore(&etrax_dma8_sub0_lock, flags);
+}
+
+/* queue an URB with the transfer controller (called from hcd_driver) */
+static int tc_urb_enqueue(struct usb_hcd *hcd, 
+			  struct usb_host_endpoint *ep,
+			  struct urb *urb, 
+			  gfp_t mem_flags) {
+  int epid;
+  int retval;
+  int bustime = 0;
+  int maxpacket;
+  unsigned long flags;
+  struct crisv10_urb_priv *urb_priv;
+  struct crisv10_hcd* crisv10_hcd = hcd_to_crisv10_hcd(hcd);
+  DBFENTER;
+
+  if(!(crisv10_hcd->running)) {
+    /* The USB Controller is not running, probably because no device is 
+       attached. No idea to enqueue URBs then */
+    tc_warn("Rejected enqueueing of URB:0x%x because no dev attached\n",
+	    (unsigned int)urb);
+    return -ENOENT;
+  }
+
+  maxpacket = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
+  /* Special case check for In Isoc transfers. Specification states that each
+     In Isoc transfer consists of one packet and therefore it should fit into
+     the transfer-buffer of an URB.
+     We do the check here to be sure (an invalid scenario can be produced with
+     parameters to the usbtest suite) */
+  if(usb_pipeisoc(urb->pipe) && usb_pipein(urb->pipe) &&
+     (urb->transfer_buffer_length < maxpacket)) {
+    tc_err("Submit In Isoc URB with buffer length:%d to pipe with maxpacketlen: %d\n", urb->transfer_buffer_length, maxpacket);
+    return -EMSGSIZE;
+  }
+
+  /* Check if there is enough bandwidth for periodic transfer  */
+  if(usb_pipeint(urb->pipe) || usb_pipeisoc(urb->pipe)) {
+    /* only check (and later claim) if not already claimed */
+    if (urb->bandwidth == 0) {
+      bustime = usb_check_bandwidth(urb->dev, urb);
+      if (bustime < 0) {
+	tc_err("Not enough periodic bandwidth\n");
+	return -ENOSPC;
+      }
+    }
+  }
+
+  /* Check if there is a epid for URBs destination, if not this function
+     set up one. */
+  epid = tc_setup_epid(ep, urb, mem_flags);
+  if (epid < 0) {
+    tc_err("Failed setup epid:%d for URB:0x%x\n", epid, (unsigned int)urb);
+    DBFEXIT;
+    return -ENOMEM;
+  }
+
+  if(urb == activeUrbList[epid]) {
+    tc_err("Resubmition of allready active URB:0x%x\n", (unsigned int)urb);
+    return -ENXIO;
+  }
+
+  if(urb_list_entry(urb, epid)) {
+    tc_err("Resubmition of allready queued URB:0x%x\n", (unsigned int)urb);
+    return -ENXIO;
+  }
+
+  /* If we actively have flaged endpoint as disabled then refuse submition */
+  if(epid_state[epid].disabled) {
+    return -ENOENT;
+  }
+
+  /* Allocate and init HC-private data for URB */
+  if(urb_priv_create(hcd, urb, epid, mem_flags) != 0) {
+    DBFEXIT;
+    return -ENOMEM;
+  }
+  urb_priv = urb->hcpriv;
+
+  tc_dbg("Enqueue URB:0x%x[%d] epid:%d (%s) bufflen:%d\n",
+	 (unsigned int)urb, urb_priv->urb_num, epid,
+	 pipe_to_str(urb->pipe), urb->transfer_buffer_length);
+
+  /* Create and link SBs required for this URB */
+  retval = create_sb_for_urb(urb, mem_flags);
+  if(retval != 0) {
+    tc_err("Failed to create SBs for URB:0x%x[%d]\n", (unsigned int)urb,
+	   urb_priv->urb_num);
+    urb_priv_free(hcd, urb);
+    DBFEXIT;
+    return retval;
+  }
+
+  /* Init intr EP pool if this URB is a INTR transfer. This pool is later
+     used when inserting EPs in the TxIntrEPList. We do the alloc here
+     so we can't run out of memory later */
+  if(usb_pipeint(urb->pipe)) {
+    retval = init_intr_urb(urb, mem_flags);
+    if(retval != 0) {
+      tc_warn("Failed to init Intr URB\n");
+      urb_priv_free(hcd, urb);
+      DBFEXIT;
+      return retval;
+    }
+  }
+
+  /* Disable other access when inserting USB */
+  local_irq_save(flags);
+
+  /* Claim bandwidth, if needed */
+  if(bustime) {
+    usb_claim_bandwidth(urb->dev, urb, bustime, 0);
+  }
+  
+  /* Add URB to EP queue */
+  urb_list_add(urb, epid, mem_flags);
+
+  if(usb_pipeisoc(urb->pipe)) {
+    /* Special processing of Isoc URBs. */
+    tc_dma_process_isoc_urb(urb);
+  } else {
+    /* Process EP queue for rest of the URB types (Bulk, Ctrl, Intr) */
+    tc_dma_process_queue(epid);
+  }
+
+  local_irq_restore(flags);
+
+  DBFEXIT;
+  return 0;
+}
+
+/* remove an URB from the transfer controller queues (called from hcd_driver)*/
+static int tc_urb_dequeue(struct usb_hcd *hcd, struct urb *urb) {
+  struct crisv10_urb_priv *urb_priv;
+  unsigned long flags;
+  int epid;
+
+  DBFENTER;
+  /* Disable interrupts here since a descriptor interrupt for the isoc epid
+     will modify the sb list.  This could possibly be done more granular, but
+     urb_dequeue should not be used frequently anyway.
+  */
+  local_irq_save(flags);
+
+  urb_priv = urb->hcpriv;
+
+  if (!urb_priv) {
+    /* This happens if a device driver calls unlink on an urb that
+       was never submitted (lazy driver) or if the urb was completed
+       while dequeue was being called. */
+    tc_warn("Dequeing of not enqueued URB:0x%x\n", (unsigned int)urb);
+    local_irq_restore(flags);
+    return 0;
+  }
+  epid = urb_priv->epid;
+
+  tc_warn("Dequeing %s URB:0x%x[%d] (%s %s epid:%d) status:%d %s\n",
+	  (urb == activeUrbList[epid]) ? "active" : "queued",
+	  (unsigned int)urb, urb_priv->urb_num, str_dir(urb->pipe),
+	  str_type(urb->pipe), epid, urb->status,
+	  (urb_priv->later_data) ? "later-sched" : "");
+
+  /* For Bulk, Ctrl and Intr are only one URB active at a time. So any URB
+     that isn't active can be dequeued by just removing it from the queue */
+  if(usb_pipebulk(urb->pipe) || usb_pipecontrol(urb->pipe) ||
+     usb_pipeint(urb->pipe)) {
+
+    /* Check if URB haven't gone further than the queue */
+    if(urb != activeUrbList[epid]) {
+      ASSERT(urb_priv->later_data == NULL);
+      tc_warn("Dequeing URB:0x%x[%d] (%s %s epid:%d) from queue"
+	      " (not active)\n", (unsigned int)urb, urb_priv->urb_num,
+	      str_dir(urb->pipe), str_type(urb->pipe), epid);
+      
+      /* Finish the URB with error status from USB core */
+      tc_finish_urb(hcd, urb, urb->status);
+      local_irq_restore(flags);
+      return 0;
+    }
+  }
+
+  /* Set URB status to Unlink for handling when interrupt comes. */
+  urb_priv->urb_state = UNLINK;
+
+  /* Differentiate dequeing of Bulk and Ctrl from Isoc and Intr */
+  switch(usb_pipetype(urb->pipe)) {
+  case PIPE_BULK:
+    /* Check if EP still is enabled */
+    if (TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+      /* The EP was enabled, disable it. */
+      TxBulkEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
+    }
+    /* Kicking dummy list out of the party. */
+    TxBulkEPList[epid].next = virt_to_phys(&TxBulkEPList[(epid + 1) % NBR_OF_EPIDS]);
+    break;
+  case PIPE_CONTROL:
+    /* Check if EP still is enabled */
+    if (TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+      /* The EP was enabled, disable it. */
+      TxCtrlEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
+    }
+    break;
+  case PIPE_ISOCHRONOUS:
+    /* Disabling, busy-wait and unlinking of Isoc SBs will be done in
+       finish_isoc_urb(). Because there might the case when URB is dequeued
+       but there are other valid URBs waiting */
+
+    /* Check if In Isoc EP still is enabled */
+    if (TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+      /* The EP was enabled, disable it. */
+      TxIsocEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
+    }
+    break;
+  case PIPE_INTERRUPT:
+    /* Special care is taken for interrupt URBs. EPs are unlinked in
+       tc_finish_urb */
+    break;
+  default:
+    break;
+  }
+
+  /* Asynchronous unlink, finish the URB later from scheduled or other
+     event (data finished, error) */
+  tc_finish_urb_later(hcd, urb, urb->status);
+
+  local_irq_restore(flags);
+  DBFEXIT;
+  return 0;
+}
+
+
+static void tc_sync_finish_epid(struct usb_hcd *hcd, int epid) {
+  volatile int timeout = 10000;
+  struct urb* urb;
+  struct crisv10_urb_priv* urb_priv;
+  unsigned long flags;
+  
+  volatile struct USB_EP_Desc *first_ep;  /* First EP in the list. */
+  volatile struct USB_EP_Desc *curr_ep;   /* Current EP, the iterator. */
+  volatile struct USB_EP_Desc *next_ep;   /* The EP after current. */
+
+  int type = epid_state[epid].type;
+
+  /* Setting this flag will cause enqueue() to return -ENOENT for new
+     submitions on this endpoint and finish_urb() wont process queue further */
+  epid_state[epid].disabled = 1;
+
+  switch(type) {
+  case PIPE_BULK:
+    /* Check if EP still is enabled */
+    if (TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+      /* The EP was enabled, disable it. */
+      TxBulkEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
+      tc_warn("sync_finish: Disabling EP for epid:%d\n", epid);
+
+      /* Do busy-wait until DMA not using this EP descriptor anymore */
+      while((*R_DMA_CH8_SUB0_EP ==
+	     virt_to_phys(&TxBulkEPList[epid])) &&
+	    (timeout-- > 0));
+      if(timeout == 0) {
+	warn("Timeout while waiting for DMA-TX-Bulk to leave EP for"
+	     " epid:%d\n", epid);
+      }
+    }
+    break;
+
+  case PIPE_CONTROL:
+    /* Check if EP still is enabled */
+    if (TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+      /* The EP was enabled, disable it. */
+      TxCtrlEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
+      tc_warn("sync_finish: Disabling EP for epid:%d\n", epid);
+
+      /* Do busy-wait until DMA not using this EP descriptor anymore */
+      while((*R_DMA_CH8_SUB1_EP ==
+	     virt_to_phys(&TxCtrlEPList[epid])) &&
+	    (timeout-- > 0));
+      if(timeout == 0) {
+	warn("Timeout while waiting for DMA-TX-Ctrl to leave EP for"
+	     " epid:%d\n", epid);
+      }
+    }
+    break;
+
+  case PIPE_INTERRUPT:
+    local_irq_save(flags);
+    /* Disable all Intr EPs belonging to epid */
+    first_ep = &TxIntrEPList[0];
+    curr_ep = first_ep;
+    do {
+      next_ep = (struct USB_EP_Desc *)phys_to_virt(curr_ep->next);
+      if (IO_EXTRACT(USB_EP_command, epid, next_ep->command) == epid) {
+	/* Disable EP */
+	next_ep->command &= ~IO_MASK(USB_EP_command, enable);
+      }
+      curr_ep = phys_to_virt(curr_ep->next);
+    } while (curr_ep != first_ep);
+
+    local_irq_restore(flags);
+    break;
+
+  case PIPE_ISOCHRONOUS:
+    /* Check if EP still is enabled */
+    if (TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+      tc_warn("sync_finish: Disabling Isoc EP for epid:%d\n", epid);
+      /* The EP was enabled, disable it. */
+      TxIsocEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
+      
+      while((*R_DMA_CH8_SUB3_EP == virt_to_phys(&TxIsocEPList[epid])) &&
+	    (timeout-- > 0));
+      if(timeout == 0) {
+	warn("Timeout while waiting for DMA-TX-Isoc to leave EP for"
+	     " epid:%d\n", epid);
+      }
+    }
+    break;
+  }
+
+  local_irq_save(flags);
+
+  /* Finish if there is active URB for this endpoint */
+  if(activeUrbList[epid] != NULL) {
+    urb = activeUrbList[epid];
+    urb_priv = urb->hcpriv;
+    ASSERT(urb_priv);
+    tc_warn("Sync finish %s URB:0x%x[%d] (%s %s epid:%d) status:%d %s\n",
+	    (urb == activeUrbList[epid]) ? "active" : "queued",
+	    (unsigned int)urb, urb_priv->urb_num, str_dir(urb->pipe),
+	    str_type(urb->pipe), epid, urb->status,
+	    (urb_priv->later_data) ? "later-sched" : "");
+
+    tc_finish_urb(hcd, activeUrbList[epid], -ENOENT);
+    ASSERT(activeUrbList[epid] == NULL);
+  }
+
+  /* Finish any queued URBs for this endpoint. There won't be any resubmitions
+     because epid_disabled causes enqueue() to fail for this endpoint */
+  while((urb = urb_list_first(epid)) != NULL) {
+    urb_priv = urb->hcpriv;
+    ASSERT(urb_priv);
+
+    tc_warn("Sync finish %s URB:0x%x[%d] (%s %s epid:%d) status:%d %s\n",
+	    (urb == activeUrbList[epid]) ? "active" : "queued",
+	    (unsigned int)urb, urb_priv->urb_num, str_dir(urb->pipe),
+	    str_type(urb->pipe), epid, urb->status,
+	    (urb_priv->later_data) ? "later-sched" : "");
+
+    tc_finish_urb(hcd, urb, -ENOENT);
+  }
+  epid_state[epid].disabled = 0;
+  local_irq_restore(flags);
+}
+
+/* free resources associated with an endpoint (called from hcd_driver) */
+static void tc_endpoint_disable(struct usb_hcd *hcd, 
+				struct usb_host_endpoint *ep) {
+  DBFENTER;
+  /* Only free epid if it has been allocated. We get two endpoint_disable
+     requests for ctrl endpoints so ignore the second one */
+  if(ep->hcpriv != NULL) {
+    struct crisv10_ep_priv *ep_priv = ep->hcpriv;
+    int epid = ep_priv->epid;
+    tc_warn("endpoint_disable ep:0x%x ep-priv:0x%x (%s) (epid:%d freed)\n",
+	   (unsigned int)ep, (unsigned int)ep->hcpriv,
+	   endpoint_to_str(&(ep->desc)), epid);
+
+    tc_sync_finish_epid(hcd, epid);
+
+    ASSERT(activeUrbList[epid] == NULL);
+    ASSERT(list_empty(&urb_list[epid]));
+
+    tc_free_epid(ep);
+  } else {
+    tc_dbg("endpoint_disable ep:0x%x ep-priv:0x%x (%s)\n", (unsigned int)ep,
+	   (unsigned int)ep->hcpriv, endpoint_to_str(&(ep->desc)));
+  }
+  DBFEXIT;
+}
+
+static void tc_finish_urb_later_proc(void *data) {
+  unsigned long flags;
+  struct urb_later_data* uld = (struct urb_later_data*)data;
+  local_irq_save(flags);
+  if(uld->urb == NULL) {
+    late_dbg("Later finish of URB = NULL (allready finished)\n");
+  } else {
+    struct crisv10_urb_priv* urb_priv = uld->urb->hcpriv;
+    ASSERT(urb_priv);
+    if(urb_priv->urb_num == uld->urb_num) {
+      late_dbg("Later finish of URB:0x%x[%d]\n", (unsigned int)(uld->urb),
+	       urb_priv->urb_num);
+      if(uld->status != uld->urb->status) {
+	errno_dbg("Later-finish URB with status:%d, later-status:%d\n",
+		  uld->urb->status, uld->status);
+      }
+      if(uld != urb_priv->later_data) {
+	panic("Scheduled uld not same as URBs uld\n");
+      }
+      tc_finish_urb(uld->hcd, uld->urb, uld->status);
+    } else {
+      late_warn("Ignoring later finish of URB:0x%x[%d]"
+		", urb_num doesn't match current URB:0x%x[%d]",
+		(unsigned int)(uld->urb), uld->urb_num,
+		(unsigned int)(uld->urb), urb_priv->urb_num);
+    }
+  }
+  local_irq_restore(flags);
+  kmem_cache_free(later_data_cache, uld);
+}
+
+static void tc_finish_urb_later(struct usb_hcd *hcd, struct urb *urb,
+				int status) {
+  struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+  struct urb_later_data* uld;
+
+  ASSERT(urb_priv);
+
+  if(urb_priv->later_data != NULL) {
+    /* Later-finish allready scheduled for this URB, just update status to
+       return when finishing later */
+    errno_dbg("Later-finish schedule change URB status:%d with new"
+	      " status:%d\n", urb_priv->later_data->status, status);
+    
+    urb_priv->later_data->status = status;
+    return;
+  }
+
+  uld = kmem_cache_alloc(later_data_cache, SLAB_ATOMIC);
+  ASSERT(uld);
+
+  uld->hcd = hcd;
+  uld->urb = urb;
+  uld->urb_num = urb_priv->urb_num;
+  uld->status = status;
+
+  INIT_WORK(&uld->ws, tc_finish_urb_later_proc, uld);
+  urb_priv->later_data = uld;
+
+  /* Schedule the finishing of the URB to happen later */
+  schedule_delayed_work(&uld->ws, LATER_TIMER_DELAY);
+}
+
+static void tc_finish_isoc_urb(struct usb_hcd *hcd, struct urb *urb,
+			       int status);
+
+static void tc_finish_urb(struct usb_hcd *hcd, struct urb *urb, int status) {
+  struct crisv10_hcd* crisv10_hcd = hcd_to_crisv10_hcd(hcd);
+  struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+  int epid;
+  char toggle;
+  int urb_num;
+
+  DBFENTER;
+  ASSERT(urb_priv != NULL);
+  epid = urb_priv->epid;
+  urb_num = urb_priv->urb_num;
+
+  if(urb != activeUrbList[epid]) {
+    if(urb_list_entry(urb, epid)) {
+      /* Remove this URB from the list. Only happens when URB are finished
+	 before having been processed (dequeing) */
+      urb_list_del(urb, epid);
+    } else {
+      tc_warn("Finishing of URB:0x%x[%d] neither active or in queue for"
+	      " epid:%d\n", (unsigned int)urb, urb_num, epid);
+    }
+  }
+
+  /* Cancel any pending later-finish of this URB */
+  if(urb_priv->later_data) {
+    urb_priv->later_data->urb = NULL;
+  }
+
+  /* For an IN pipe, we always set the actual length, regardless of whether
+     there was an error or not (which means the device driver can use the data
+     if it wants to). */
+  if(usb_pipein(urb->pipe)) {
+    urb->actual_length = urb_priv->rx_offset;
+  } else {
+    /* Set actual_length for OUT urbs also; the USB mass storage driver seems
+       to want that. */
+    if (status == 0 && urb->status == -EINPROGRESS) {
+      urb->actual_length = urb->transfer_buffer_length;
+    } else {
+      /*  We wouldn't know of any partial writes if there was an error. */
+      urb->actual_length = 0;
+    }
+  }
+
+
+  /* URB status mangling */
+  if(urb->status == -EINPROGRESS) {
+    /* The USB core hasn't changed the status, let's set our finish status */
+    urb->status = status;
+
+    if ((status == 0) && (urb->transfer_flags & URB_SHORT_NOT_OK) &&
+	usb_pipein(urb->pipe) &&
+	(urb->actual_length != urb->transfer_buffer_length)) {
+      /* URB_SHORT_NOT_OK means that short reads (shorter than the endpoint's
+	 max length) is to be treated as an error. */
+      errno_dbg("Finishing URB:0x%x[%d] with SHORT_NOT_OK flag and short"
+		" data:%d\n", (unsigned int)urb, urb_num,
+		urb->actual_length);
+      urb->status = -EREMOTEIO;
+    }
+
+    if(urb_priv->urb_state == UNLINK) {
+      /* URB has been requested to be unlinked asynchronously */
+      urb->status = -ECONNRESET;
+      errno_dbg("Fixing unlink status of URB:0x%x[%d] to:%d\n",
+		(unsigned int)urb, urb_num, urb->status);
+    }
+  } else {
+    /* The USB Core wants to signal some error via the URB, pass it through */
+  }
+
+  /* use completely different finish function for Isoc URBs */
+  if(usb_pipeisoc(urb->pipe)) {
+    tc_finish_isoc_urb(hcd, urb, status);
+    return;
+  }
+
+  /* Do special unlinking of EPs for Intr traffic */
+  if(usb_pipeint(urb->pipe)) {
+    tc_dma_unlink_intr_urb(urb);
+  }
+
+  /* Release allocated bandwidth for periodic transfers */
+  if(usb_pipeint(urb->pipe) || usb_pipeisoc(urb->pipe))
+    usb_release_bandwidth(urb->dev, urb, 0);
+
+  /* This URB is active on EP */
+  if(urb == activeUrbList[epid]) {
+    /* We need to fiddle with the toggle bits because the hardware doesn't do
+       it for us. */
+    toggle = etrax_epid_get_toggle(epid, usb_pipeout(urb->pipe));
+    usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
+		  usb_pipeout(urb->pipe), toggle);
+
+    /* Checks for Ctrl and Bulk EPs */
+    switch(usb_pipetype(urb->pipe)) {
+    case PIPE_BULK:
+      /* Check so Bulk EP realy is disabled before finishing active URB  */
+      ASSERT((TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) ==
+	     IO_STATE(USB_EP_command, enable, no));
+      /* Disable sub-pointer for EP to avoid next tx_interrupt() to
+	 process Bulk EP. */
+      TxBulkEPList[epid].sub = 0;
+      /* No need to wait for the DMA before changing the next pointer.
+	 The modulo NBR_OF_EPIDS isn't actually necessary, since we will never use
+	 the last one (INVALID_EPID) for actual traffic. */
+      TxBulkEPList[epid].next = 
+	virt_to_phys(&TxBulkEPList[(epid + 1) % NBR_OF_EPIDS]);
+      break;
+    case PIPE_CONTROL:
+      /* Check so Ctrl EP realy is disabled before finishing active URB  */
+      ASSERT((TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)) ==
+	     IO_STATE(USB_EP_command, enable, no));
+      /* Disable sub-pointer for EP to avoid next tx_interrupt() to
+	 process Ctrl EP. */
+      TxCtrlEPList[epid].sub = 0;
+      break;
+    }
+  }
+
+  /* Free HC-private URB data*/
+  urb_priv_free(hcd, urb);
+
+  if(urb->status) {
+    errno_dbg("finish_urb (URB:0x%x[%d] %s %s) (data:%d) status:%d\n",
+	      (unsigned int)urb, urb_num, str_dir(urb->pipe),
+	      str_type(urb->pipe), urb->actual_length, urb->status);
+  } else {
+    tc_dbg("finish_urb (URB:0x%x[%d] %s %s) (data:%d) status:%d\n",
+	   (unsigned int)urb, urb_num, str_dir(urb->pipe),
+	   str_type(urb->pipe), urb->actual_length, urb->status);
+  }
+
+  /* If we just finished an active URB, clear active pointer. */
+  if (urb == activeUrbList[epid]) {
+    /* Make URB not active on EP anymore */
+    activeUrbList[epid] = NULL;
+
+    if(urb->status == 0) {
+      /* URB finished sucessfully, process queue to see if there are any more
+	 URBs waiting before we call completion function.*/
+      if(crisv10_hcd->running) {
+	/* Only process queue if USB controller is running */
+	tc_dma_process_queue(epid);
+      } else {
+	tc_warn("No processing of queue for epid:%d, USB Controller not"
+		" running\n", epid);
+      }
+    }
+  }
+
+  /*  Hand the URB from HCD to its USB device driver, using its completion
+      functions */
+  usb_hcd_giveback_urb (hcd, urb);
+
+  /* Check the queue once more if the URB returned with error, because we
+     didn't do it before the completion function because the specification
+     states that the queue should not restart until all it's unlinked
+     URBs have been fully retired, with the completion functions run */
+  if(crisv10_hcd->running) {
+    /* Only process queue if USB controller is running */
+    tc_dma_process_queue(epid);
+  } else {
+    tc_warn("No processing of queue for epid:%d, USB Controller not running\n",
+	    epid);
+  }
+
+  DBFEXIT;
+}
+
+static void tc_finish_isoc_urb(struct usb_hcd *hcd, struct urb *urb,
+			       int status) {
+  struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+  int epid, i;
+  volatile int timeout = 10000;
+
+  ASSERT(urb_priv);
+  epid = urb_priv->epid;
+
+  ASSERT(usb_pipeisoc(urb->pipe));
+
+  /* Set that all isoc packets have status and length set before
+     completing the urb. */
+  for (i = urb_priv->isoc_packet_counter; i < urb->number_of_packets; i++){
+    urb->iso_frame_desc[i].actual_length = 0;
+    urb->iso_frame_desc[i].status = -EPROTO;
+  }
+
+  /* Check if the URB is currently active (done or error) */
+  if(urb == activeUrbList[epid]) {
+    /* Check if there are another In Isoc URB queued for this epid */
+    if (!list_empty(&urb_list[epid])&& !epid_state[epid].disabled) {
+      /* Move it from queue to active and mark it started so Isoc transfers
+	 won't be interrupted.
+	 All Isoc URBs data transfers are already added to DMA lists so we
+	 don't have to insert anything in DMA lists here. */
+      activeUrbList[epid] = urb_list_first(epid);
+      ((struct crisv10_urb_priv *)(activeUrbList[epid]->hcpriv))->urb_state =
+	STARTED;
+      urb_list_del(activeUrbList[epid], epid);
+
+      if(urb->status) {
+	errno_dbg("finish_isoc_urb (URB:0x%x[%d] %s %s) (%d of %d packets)"
+		  " status:%d, new waiting URB:0x%x[%d]\n",
+		  (unsigned int)urb, urb_priv->urb_num, str_dir(urb->pipe),
+		  str_type(urb->pipe), urb_priv->isoc_packet_counter,
+		  urb->number_of_packets, urb->status,
+		  (unsigned int)activeUrbList[epid],
+		  ((struct crisv10_urb_priv *)(activeUrbList[epid]->hcpriv))->urb_num);
+      }
+
+    } else { /* No other URB queued for this epid */
+      if(urb->status) {
+	errno_dbg("finish_isoc_urb (URB:0x%x[%d] %s %s) (%d of %d packets)"
+		  " status:%d, no new URB waiting\n",
+		  (unsigned int)urb, urb_priv->urb_num, str_dir(urb->pipe),
+		  str_type(urb->pipe), urb_priv->isoc_packet_counter,
+		  urb->number_of_packets, urb->status);
+      }
+
+      /* Check if EP is still enabled, then shut it down. */
+      if (TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+	isoc_dbg("Isoc EP enabled for epid:%d, disabling it\n", epid);
+
+	/* Should only occur for In Isoc EPs where SB isn't consumed. */
+	ASSERT(usb_pipein(urb->pipe));
+
+	/* Disable it and wait for it to stop */
+	TxIsocEPList[epid].command &= ~IO_MASK(USB_EP_command, enable);
+	
+	/* Ah, the luxury of busy-wait. */
+	while((*R_DMA_CH8_SUB3_EP == virt_to_phys(&TxIsocEPList[epid])) &&
+	      (timeout-- > 0));
+	if(timeout == 0) {
+	  warn("Timeout while waiting for DMA-TX-Isoc to leave EP for epid:%d\n", epid);
+	}
+      }
+
+      /* Unlink SB to say that epid is finished. */
+      TxIsocEPList[epid].sub = 0;
+      TxIsocEPList[epid].hw_len = 0;
+
+      /* No URB active for EP anymore */
+      activeUrbList[epid] = NULL;
+    }
+  } else { /* Finishing of not active URB (queued up with SBs thought) */
+    isoc_warn("finish_isoc_urb (URB:0x%x %s) (%d of %d packets) status:%d,"
+	      " SB queued but not active\n",
+	      (unsigned int)urb, str_dir(urb->pipe),
+	      urb_priv->isoc_packet_counter, urb->number_of_packets,
+	      urb->status);
+    if(usb_pipeout(urb->pipe)) {
+      /* Finishing of not yet active Out Isoc URB needs unlinking of SBs. */
+      struct USB_SB_Desc *iter_sb, *prev_sb, *next_sb;
+
+      iter_sb = TxIsocEPList[epid].sub ?
+	phys_to_virt(TxIsocEPList[epid].sub) : 0;
+      prev_sb = 0;
+
+      /* SB that is linked before this URBs first SB */
+      while (iter_sb && (iter_sb != urb_priv->first_sb)) {
+	prev_sb = iter_sb;
+	iter_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0;
+      }
+
+      if (iter_sb == 0) {
+	/* Unlink of the URB currently being transmitted. */
+	prev_sb = 0;
+	iter_sb = TxIsocEPList[epid].sub ? phys_to_virt(TxIsocEPList[epid].sub) : 0;
+      }
+
+      while (iter_sb && (iter_sb != urb_priv->last_sb)) {
+	iter_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0;
+      }
+
+      if (iter_sb) {
+	next_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0;
+      } else {
+	/* This should only happen if the DMA has completed
+	   processing the SB list for this EP while interrupts
+	   are disabled. */
+	isoc_dbg("Isoc urb not found, already sent?\n");
+	next_sb = 0;
+      }
+      if (prev_sb) {
+	prev_sb->next = next_sb ? virt_to_phys(next_sb) : 0;
+      } else {
+	TxIsocEPList[epid].sub = next_sb ? virt_to_phys(next_sb) : 0;
+      }
+    }
+  }
+
+  /* Free HC-private URB data*/
+  urb_priv_free(hcd, urb);
+
+  usb_release_bandwidth(urb->dev, urb, 0);
+
+  /*  Hand the URB from HCD to its USB device driver, using its completion
+      functions */
+  usb_hcd_giveback_urb (hcd, urb);
+}
+
+static __u32 urb_num = 0;
+
+/* allocate and initialize URB private data */
+static int urb_priv_create(struct usb_hcd *hcd, struct urb *urb, int epid,
+			   int mem_flags) {
+  struct crisv10_urb_priv *urb_priv;
+  
+  urb_priv = kmalloc(sizeof *urb_priv, mem_flags);
+  if (!urb_priv)
+    return -ENOMEM;
+  memset(urb_priv, 0, sizeof *urb_priv);
+
+  urb_priv->epid = epid;
+  urb_priv->urb_state = NOT_STARTED;
+
+  urb->hcpriv = urb_priv;
+  /* Assign URB a sequence number, and increment counter */
+  urb_priv->urb_num = urb_num;
+  urb_num++;
+  return 0;
+}
+
+/* free URB private data */
+static void urb_priv_free(struct usb_hcd *hcd, struct urb *urb) {
+  int i;
+  struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+  ASSERT(urb_priv != 0);
+
+  /* Check it has any SBs linked that needs to be freed*/
+  if(urb_priv->first_sb != NULL) {
+    struct USB_SB_Desc *next_sb, *first_sb, *last_sb;
+    int i = 0;
+    first_sb = urb_priv->first_sb;
+    last_sb = urb_priv->last_sb;
+    ASSERT(last_sb);
+    while(first_sb != last_sb) {
+      next_sb = (struct USB_SB_Desc *)phys_to_virt(first_sb->next);
+      kmem_cache_free(usb_desc_cache, first_sb);
+      first_sb = next_sb;
+      i++;
+    }
+    kmem_cache_free(usb_desc_cache, last_sb);
+    i++;
+  }
+
+  /* Check if it has any EPs in its Intr pool that also needs to be freed */
+  if(urb_priv->intr_ep_pool_length > 0) {
+    for(i = 0; i < urb_priv->intr_ep_pool_length; i++) {
+      kfree(urb_priv->intr_ep_pool[i]);
+    }
+    /*
+    tc_dbg("Freed %d EPs from URB:0x%x EP pool\n",
+	     urb_priv->intr_ep_pool_length, (unsigned int)urb);
+    */
+  }
+
+  kfree(urb_priv);
+  urb->hcpriv = NULL;
+}
+
+static int ep_priv_create(struct usb_host_endpoint *ep, int mem_flags) {
+  struct crisv10_ep_priv *ep_priv;
+  
+  ep_priv = kmalloc(sizeof *ep_priv, mem_flags);
+  if (!ep_priv)
+    return -ENOMEM;
+  memset(ep_priv, 0, sizeof *ep_priv);
+
+  ep->hcpriv = ep_priv;
+  return 0;
+}
+
+static void ep_priv_free(struct usb_host_endpoint *ep) {
+  struct crisv10_ep_priv *ep_priv = ep->hcpriv;
+  ASSERT(ep_priv);
+  kfree(ep_priv);
+  ep->hcpriv = NULL;
+}
+
+/* EPID handling functions, managing EP-list in Etrax through wrappers */
+/* ------------------------------------------------------------------- */
+
+/* Sets up a new EPID for an endpoint or returns existing if found */
+static int tc_setup_epid(struct usb_host_endpoint *ep, struct urb *urb,
+			 int mem_flags) {
+  int epid;
+  char devnum, endpoint, out_traffic, slow;
+  int maxlen;
+  __u32 epid_data;
+  struct crisv10_ep_priv *ep_priv = ep->hcpriv;
+  
+  DBFENTER;
+  
+  /* Check if a valid epid already is setup for this endpoint */
+  if(ep_priv != NULL) {
+    return ep_priv->epid;
+  }
+
+  /* We must find and initiate a new epid for this urb. */
+  epid = tc_allocate_epid();
+  
+  if (epid == -1) {
+    /* Failed to allocate a new epid. */
+    DBFEXIT;
+    return epid;
+  }
+  
+  /* We now have a new epid to use. Claim it. */
+  epid_state[epid].inuse = 1;
+  
+  /* Init private data for new endpoint */
+  if(ep_priv_create(ep, mem_flags) != 0) {
+    return -ENOMEM;
+  }
+  ep_priv = ep->hcpriv;
+  ep_priv->epid = epid;
+
+  devnum = usb_pipedevice(urb->pipe);
+  endpoint = usb_pipeendpoint(urb->pipe);
+  slow = (urb->dev->speed == USB_SPEED_LOW);
+  maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
+
+  if (usb_pipetype(urb->pipe) == PIPE_CONTROL) {
+    /* We want both IN and OUT control traffic to be put on the same
+       EP/SB list. */
+    out_traffic = 1;
+  } else {
+    out_traffic = usb_pipeout(urb->pipe);
+  }
+    
+  if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
+    epid_data = IO_STATE(R_USB_EPT_DATA_ISO, valid, yes) |
+      /* FIXME: Change any to the actual port? */
+      IO_STATE(R_USB_EPT_DATA_ISO, port, any) |
+      IO_FIELD(R_USB_EPT_DATA_ISO, max_len, maxlen) |
+      IO_FIELD(R_USB_EPT_DATA_ISO, ep, endpoint) |
+      IO_FIELD(R_USB_EPT_DATA_ISO, dev, devnum);
+    etrax_epid_iso_set(epid, epid_data);
+  } else {
+    epid_data = IO_STATE(R_USB_EPT_DATA, valid, yes) |
+      IO_FIELD(R_USB_EPT_DATA, low_speed, slow) |
+      /* FIXME: Change any to the actual port? */
+      IO_STATE(R_USB_EPT_DATA, port, any) |
+      IO_FIELD(R_USB_EPT_DATA, max_len, maxlen) |
+      IO_FIELD(R_USB_EPT_DATA, ep, endpoint) |
+      IO_FIELD(R_USB_EPT_DATA, dev, devnum);
+    etrax_epid_set(epid, epid_data);
+  }
+  
+  epid_state[epid].out_traffic = out_traffic;
+  epid_state[epid].type = usb_pipetype(urb->pipe);
+
+  tc_warn("Setting up ep:0x%x epid:%d (addr:%d endp:%d max_len:%d %s %s %s)\n",
+	  (unsigned int)ep, epid, devnum, endpoint, maxlen,
+	  str_type(urb->pipe), out_traffic ? "out" : "in",
+	  slow ? "low" : "full");
+
+  /* Enable Isoc eof interrupt if we set up the first Isoc epid */
+  if(usb_pipeisoc(urb->pipe)) {
+    isoc_epid_counter++;
+    if(isoc_epid_counter == 1) {
+      isoc_warn("Enabled Isoc eof interrupt\n");
+      *R_USB_IRQ_MASK_SET |= IO_STATE(R_USB_IRQ_MASK_SET, iso_eof, set);
+    }
+  }
+
+  DBFEXIT;
+  return epid;
+}
+
+static void tc_free_epid(struct usb_host_endpoint *ep) {
+  unsigned long flags;
+  struct crisv10_ep_priv *ep_priv = ep->hcpriv;
+  int epid;
+  volatile int timeout = 10000;
+
+  DBFENTER;
+
+  if (ep_priv == NULL) {
+    tc_warn("Trying to free unused epid on ep:0x%x\n", (unsigned int)ep);
+    DBFEXIT;
+    return;
+  }
+
+  epid = ep_priv->epid;
+
+  /* Disable Isoc eof interrupt if we free the last Isoc epid */
+  if(epid_isoc(epid)) {
+    ASSERT(isoc_epid_counter > 0);
+    isoc_epid_counter--;
+    if(isoc_epid_counter == 0) {
+      *R_USB_IRQ_MASK_SET &= ~IO_STATE(R_USB_IRQ_MASK_SET, iso_eof, set);
+      isoc_warn("Disabled Isoc eof interrupt\n");
+    }
+  }
+
+  /* Take lock manualy instead of in epid_x_x wrappers,
+     because we need to be polling here */
+  spin_lock_irqsave(&etrax_epid_lock, flags);
+  
+  *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid);
+  nop();
+  while((*R_USB_EPT_DATA & IO_MASK(R_USB_EPT_DATA, hold)) &&
+	(timeout-- > 0));
+  if(timeout == 0) {
+    warn("Timeout while waiting for epid:%d to drop hold\n", epid);
+  }
+  /* This will, among other things, set the valid field to 0. */
+  *R_USB_EPT_DATA = 0;
+  spin_unlock_irqrestore(&etrax_epid_lock, flags);
+  
+  /* Free resource in software state info list */
+  epid_state[epid].inuse = 0;
+
+  /* Free private endpoint data */
+  ep_priv_free(ep);
+  
+  DBFEXIT;
+}
+
+static int tc_allocate_epid(void) {
+  int i;
+  DBFENTER;
+  for (i = 0; i < NBR_OF_EPIDS; i++) {
+    if (!epid_inuse(i)) {
+      DBFEXIT;
+      return i;
+    }
+  }
+  
+  tc_warn("Found no free epids\n");
+  DBFEXIT;
+  return -1;
+}
+
+
+/* Wrappers around the list functions (include/linux/list.h). */
+/* ---------------------------------------------------------- */
+static inline int __urb_list_empty(int epid) {
+  int retval;
+  retval = list_empty(&urb_list[epid]);
+  return retval;
+}
+
+/* Returns first urb for this epid, or NULL if list is empty. */
+static inline struct urb *urb_list_first(int epid) {
+  unsigned long flags;
+  struct urb *first_urb = 0;
+  spin_lock_irqsave(&urb_list_lock, flags);
+  if (!__urb_list_empty(epid)) {
+    /* Get the first urb (i.e. head->next). */
+    urb_entry_t *urb_entry = list_entry((&urb_list[epid])->next, urb_entry_t, list);
+    first_urb = urb_entry->urb;
+  }
+  spin_unlock_irqrestore(&urb_list_lock, flags);
+  return first_urb;
+}
+
+/* Adds an urb_entry last in the list for this epid. */
+static inline void urb_list_add(struct urb *urb, int epid, int mem_flags) {
+  unsigned long flags;
+  urb_entry_t *urb_entry = (urb_entry_t *)kmalloc(sizeof(urb_entry_t), mem_flags);
+  ASSERT(urb_entry);
+  
+  urb_entry->urb = urb;
+  spin_lock_irqsave(&urb_list_lock, flags);
+  list_add_tail(&urb_entry->list, &urb_list[epid]);
+  spin_unlock_irqrestore(&urb_list_lock, flags);
+}
+
+/* Search through the list for an element that contains this urb. (The list
+   is expected to be short and the one we are about to delete will often be
+   the first in the list.)
+   Should be protected by spin_locks in calling function */
+static inline urb_entry_t *__urb_list_entry(struct urb *urb, int epid) {
+  struct list_head *entry;
+  struct list_head *tmp;
+  urb_entry_t *urb_entry;
+  
+  list_for_each_safe(entry, tmp, &urb_list[epid]) {
+    urb_entry = list_entry(entry, urb_entry_t, list);
+    ASSERT(urb_entry);
+    ASSERT(urb_entry->urb);
+    
+    if (urb_entry->urb == urb) {
+      return urb_entry;
+    }
+  }
+  return 0;
+}
+
+/* Same function as above but for global use. Protects list by spinlock */
+static inline urb_entry_t *urb_list_entry(struct urb *urb, int epid) {
+  unsigned long flags;
+  urb_entry_t *urb_entry;
+  spin_lock_irqsave(&urb_list_lock, flags);
+  urb_entry = __urb_list_entry(urb, epid);
+  spin_unlock_irqrestore(&urb_list_lock, flags);
+  return (urb_entry);
+}
+
+/* Delete an urb from the list. */
+static inline void urb_list_del(struct urb *urb, int epid) {
+  unsigned long flags;
+  urb_entry_t *urb_entry;
+
+  /* Delete entry and free. */
+  spin_lock_irqsave(&urb_list_lock, flags);
+  urb_entry = __urb_list_entry(urb, epid);
+  ASSERT(urb_entry);
+
+  list_del(&urb_entry->list);
+  spin_unlock_irqrestore(&urb_list_lock, flags);
+  kfree(urb_entry);
+}
+
+/* Move an urb to the end of the list. */
+static inline void urb_list_move_last(struct urb *urb, int epid) {
+  unsigned long flags;
+  urb_entry_t *urb_entry;
+  
+  spin_lock_irqsave(&urb_list_lock, flags);
+  urb_entry = __urb_list_entry(urb, epid);
+  ASSERT(urb_entry);
+
+  list_del(&urb_entry->list);
+  list_add_tail(&urb_entry->list, &urb_list[epid]);
+  spin_unlock_irqrestore(&urb_list_lock, flags);
+}
+
+/* Get the next urb in the list. */
+static inline struct urb *urb_list_next(struct urb *urb, int epid) {
+  unsigned long flags;
+  urb_entry_t *urb_entry;
+
+  spin_lock_irqsave(&urb_list_lock, flags);
+  urb_entry = __urb_list_entry(urb, epid);
+  ASSERT(urb_entry);
+
+  if (urb_entry->list.next != &urb_list[epid]) {
+    struct list_head *elem = urb_entry->list.next;
+    urb_entry = list_entry(elem, urb_entry_t, list);
+    spin_unlock_irqrestore(&urb_list_lock, flags);
+    return urb_entry->urb;
+  } else {
+    spin_unlock_irqrestore(&urb_list_lock, flags);
+    return NULL;
+  }
+}
+
+struct USB_EP_Desc* create_ep(int epid, struct USB_SB_Desc* sb_desc,
+			      int mem_flags) {
+  struct USB_EP_Desc *ep_desc;
+  ep_desc = (struct USB_EP_Desc *) kmem_cache_alloc(usb_desc_cache, mem_flags);
+  if(ep_desc == NULL)
+    return NULL;
+  memset(ep_desc, 0, sizeof(struct USB_EP_Desc));
+
+  ep_desc->hw_len = 0;
+  ep_desc->command = (IO_FIELD(USB_EP_command, epid, epid) |
+		      IO_STATE(USB_EP_command, enable, yes));
+  if(sb_desc == NULL) {
+    ep_desc->sub = 0;
+  } else {
+    ep_desc->sub = virt_to_phys(sb_desc);
+  }
+  return ep_desc;
+}
+
+#define TT_ZOUT  0
+#define TT_IN    1
+#define TT_OUT   2
+#define TT_SETUP 3
+
+#define CMD_EOL  IO_STATE(USB_SB_command, eol, yes)
+#define CMD_INTR IO_STATE(USB_SB_command, intr, yes)
+#define CMD_FULL IO_STATE(USB_SB_command, full, yes)
+
+/* Allocation and setup of a generic SB. Used to create SETUP, OUT and ZOUT
+   SBs. Also used by create_sb_in() to avoid same allocation procedure at two
+   places */
+struct USB_SB_Desc* create_sb(struct USB_SB_Desc* sb_prev, int tt, void* data,
+			      int datalen, int mem_flags) {
+  struct USB_SB_Desc *sb_desc;
+  sb_desc = (struct USB_SB_Desc*)kmem_cache_alloc(usb_desc_cache, mem_flags);
+  if(sb_desc == NULL)
+    return NULL;
+  memset(sb_desc, 0, sizeof(struct USB_SB_Desc));
+
+  sb_desc->command = IO_FIELD(USB_SB_command, tt, tt) |
+                     IO_STATE(USB_SB_command, eot, yes);
+
+  sb_desc->sw_len = datalen;
+  if(data != NULL) {
+    sb_desc->buf = virt_to_phys(data);
+  } else {
+    sb_desc->buf = 0;
+  }
+  if(sb_prev != NULL) {
+    sb_prev->next = virt_to_phys(sb_desc);
+  }
+  return sb_desc;
+}
+
+/* Creates a copy of an existing SB by allocation space for it and copy
+   settings */
+struct USB_SB_Desc* create_sb_copy(struct USB_SB_Desc* sb_orig, int mem_flags) {
+  struct USB_SB_Desc *sb_desc;
+  sb_desc = (struct USB_SB_Desc*)kmem_cache_alloc(usb_desc_cache, mem_flags);
+  if(sb_desc == NULL)
+    return NULL;
+
+  memcpy(sb_desc, sb_orig, sizeof(struct USB_SB_Desc));
+  return sb_desc;
+}
+
+/* A specific create_sb function for creation of in SBs. This is due to
+   that datalen in In SBs shows how many packets we are expecting. It also
+   sets up the rem field to show if how many bytes we expect in last packet
+   if it's not a full one */
+struct USB_SB_Desc* create_sb_in(struct USB_SB_Desc* sb_prev, int datalen,
+				 int maxlen, int mem_flags) {
+  struct USB_SB_Desc *sb_desc;
+  sb_desc = create_sb(sb_prev, TT_IN, NULL,
+		      datalen ? (datalen - 1) / maxlen + 1 : 0, mem_flags);
+  if(sb_desc == NULL)
+    return NULL;
+  sb_desc->command |= IO_FIELD(USB_SB_command, rem, datalen % maxlen);
+  return sb_desc;
+}
+
+void set_sb_cmds(struct USB_SB_Desc *sb_desc, __u16 flags) {
+  sb_desc->command |= flags;
+}
+
+int create_sb_for_urb(struct urb *urb, int mem_flags) {
+  int is_out = !usb_pipein(urb->pipe);
+  int type = usb_pipetype(urb->pipe);
+  int maxlen = usb_maxpacket(urb->dev, urb->pipe, is_out);
+  int buf_len = urb->transfer_buffer_length;
+  void *buf = buf_len > 0 ? urb->transfer_buffer : NULL;
+  struct USB_SB_Desc *sb_desc = NULL;
+
+  struct crisv10_urb_priv *urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+  ASSERT(urb_priv != NULL);
+
+  switch(type) {
+  case PIPE_CONTROL:
+    /* Setup stage */
+    sb_desc = create_sb(NULL, TT_SETUP, urb->setup_packet, 8, mem_flags);
+    if(sb_desc == NULL)
+      return -ENOMEM;
+    set_sb_cmds(sb_desc, CMD_FULL);
+
+    /* Attach first SB to URB */
+    urb_priv->first_sb = sb_desc;    
+
+    if (is_out) { /* Out Control URB */
+      /* If this Control OUT transfer has an optional data stage we add
+	 an OUT token before the mandatory IN (status) token */
+      if ((buf_len > 0) && buf) {
+	sb_desc = create_sb(sb_desc, TT_OUT, buf, buf_len, mem_flags);
+	if(sb_desc == NULL)
+	  return -ENOMEM;
+	set_sb_cmds(sb_desc, CMD_FULL);
+      }
+
+      /* Status stage */
+      /* The data length has to be exactly 1. This is due to a requirement
+         of the USB specification that a host must be prepared to receive
+         data in the status phase */
+      sb_desc = create_sb(sb_desc, TT_IN, NULL, 1, mem_flags);
+      if(sb_desc == NULL)
+	return -ENOMEM;
+    } else { /* In control URB */
+      /* Data stage */
+      sb_desc = create_sb_in(sb_desc, buf_len, maxlen, mem_flags);
+      if(sb_desc == NULL)
+	return -ENOMEM;
+
+      /* Status stage */
+      /* Read comment at zout_buffer declaration for an explanation to this. */
+      sb_desc = create_sb(sb_desc, TT_ZOUT, &zout_buffer[0], 1, mem_flags);
+      if(sb_desc == NULL)
+	return -ENOMEM;
+      /* Set descriptor interrupt flag for in URBs so we can finish URB after
+         zout-packet has been sent */
+      set_sb_cmds(sb_desc, CMD_INTR | CMD_FULL);
+    }
+    /* Set end-of-list flag in last SB */
+    set_sb_cmds(sb_desc, CMD_EOL);
+    /* Attach last SB to URB */
+    urb_priv->last_sb = sb_desc;
+    break;
+
+  case PIPE_BULK:
+    if (is_out) { /* Out Bulk URB */
+      sb_desc = create_sb(NULL, TT_OUT, buf, buf_len, mem_flags);
+      if(sb_desc == NULL)
+	return -ENOMEM;
+      /* The full field is set to yes, even if we don't actually check that
+	 this is a full-length transfer (i.e., that transfer_buffer_length %
+	 maxlen = 0).
+	 Setting full prevents the USB controller from sending an empty packet
+	 in that case.  However, if URB_ZERO_PACKET was set we want that. */
+      if (!(urb->transfer_flags & URB_ZERO_PACKET)) {
+	set_sb_cmds(sb_desc, CMD_FULL);
+      }
+    } else { /* In Bulk URB */
+      sb_desc = create_sb_in(NULL, buf_len, maxlen, mem_flags);
+      if(sb_desc == NULL)
+	return -ENOMEM;
+    }
+    /* Set end-of-list flag for last SB */
+    set_sb_cmds(sb_desc, CMD_EOL);
+
+    /* Attach SB to URB */
+    urb_priv->first_sb = sb_desc;
+    urb_priv->last_sb = sb_desc;
+    break;
+
+  case PIPE_INTERRUPT:
+    if(is_out) { /* Out Intr URB */
+      sb_desc = create_sb(NULL, TT_OUT, buf, buf_len, mem_flags);
+      if(sb_desc == NULL)
+	return -ENOMEM;
+
+      /* The full field is set to yes, even if we don't actually check that
+	 this is a full-length transfer (i.e., that transfer_buffer_length %
+	 maxlen = 0).
+	 Setting full prevents the USB controller from sending an empty packet
+	 in that case.  However, if URB_ZERO_PACKET was set we want that. */
+      if (!(urb->transfer_flags & URB_ZERO_PACKET)) {
+	set_sb_cmds(sb_desc, CMD_FULL);
+      }
+      /* Only generate TX interrupt if it's a Out URB*/
+      set_sb_cmds(sb_desc, CMD_INTR);
+
+    } else { /* In Intr URB */
+      sb_desc = create_sb_in(NULL, buf_len, maxlen, mem_flags);
+      if(sb_desc == NULL)
+	return -ENOMEM;
+    }
+    /* Set end-of-list flag for last SB */
+    set_sb_cmds(sb_desc, CMD_EOL);
+
+    /* Attach SB to URB */
+    urb_priv->first_sb = sb_desc;
+    urb_priv->last_sb = sb_desc;
+
+    break;
+  case PIPE_ISOCHRONOUS:
+    if(is_out) { /* Out Isoc URB */
+      int i;
+      if(urb->number_of_packets == 0) {
+	tc_err("Can't create SBs for Isoc URB with zero packets\n");
+	return -EPIPE;
+      }
+      /* Create one SB descriptor for each packet and link them together. */
+      for(i = 0; i < urb->number_of_packets; i++) {
+	if (urb->iso_frame_desc[i].length > 0) {
+
+	  sb_desc = create_sb(sb_desc, TT_OUT, urb->transfer_buffer +
+			      urb->iso_frame_desc[i].offset,
+			      urb->iso_frame_desc[i].length, mem_flags);
+	  if(sb_desc == NULL)
+	    return -ENOMEM;
+
+	  /* Check if it's a full length packet */
+	  if (urb->iso_frame_desc[i].length ==
+	      usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe))) {
+	    set_sb_cmds(sb_desc, CMD_FULL);
+	  }
+	  
+	} else { /* zero length packet */
+	  sb_desc = create_sb(sb_desc, TT_ZOUT, &zout_buffer[0], 1, mem_flags);
+	  if(sb_desc == NULL)
+	    return -ENOMEM;
+	  set_sb_cmds(sb_desc, CMD_FULL);
+	}
+	/* Attach first SB descriptor to URB */
+	if (i == 0) {
+	  urb_priv->first_sb = sb_desc;
+	}
+      }
+      /* Set interrupt and end-of-list flags in last SB */
+      set_sb_cmds(sb_desc, CMD_INTR | CMD_EOL);
+      /* Attach last SB descriptor to URB */
+      urb_priv->last_sb = sb_desc;
+      tc_dbg("Created %d out SBs for Isoc URB:0x%x\n",
+	       urb->number_of_packets, (unsigned int)urb);
+    } else { /* In Isoc URB */
+      /* Actual number of packets is not relevant for periodic in traffic as
+	 long as it is more than zero.  Set to 1 always. */
+      sb_desc = create_sb(sb_desc, TT_IN, NULL, 1, mem_flags);
+      if(sb_desc == NULL)
+	return -ENOMEM;
+      /* Set end-of-list flags for SB */
+      set_sb_cmds(sb_desc, CMD_EOL);
+
+      /* Attach SB to URB */
+      urb_priv->first_sb = sb_desc;
+      urb_priv->last_sb = sb_desc;
+    }
+    break;
+  default:
+    tc_err("Unknown pipe-type\n");
+    return -EPIPE;
+    break;
+  }
+  return 0;
+}
+
+int init_intr_urb(struct urb *urb, int mem_flags) {
+  struct crisv10_urb_priv *urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+  struct USB_EP_Desc* ep_desc;
+  int interval;
+  int i;
+  int ep_count;
+
+  ASSERT(urb_priv != NULL);
+  ASSERT(usb_pipeint(urb->pipe));
+  /* We can't support interval longer than amount of eof descriptors in
+     TxIntrEPList */
+  if(urb->interval > MAX_INTR_INTERVAL) {
+    tc_err("Interrupt interval %dms too big (max: %dms)\n", urb->interval,
+	   MAX_INTR_INTERVAL);
+    return -EINVAL;
+  }
+
+  /* We assume that the SB descriptors already have been setup */
+  ASSERT(urb_priv->first_sb != NULL);
+
+  /* Round of the interval to 2^n, it is obvious that this code favours
+     smaller numbers, but that is actually a good thing */
+  /* FIXME: The "rounding error" for larger intervals will be quite
+     large. For in traffic this shouldn't be a problem since it will only
+     mean that we "poll" more often. */
+  interval = urb->interval;
+  for (i = 0; interval; i++) {
+    interval = interval >> 1;
+  }
+  urb_priv->interval = 1 << (i - 1);
+
+  /* We can only have max interval for Out Interrupt due to that we can only
+     handle one linked in EP for a certain epid in the Intr descr array at the
+     time. The USB Controller in the Etrax 100LX continues to process Intr EPs
+     so we have no way of knowing which one that caused the actual transfer if
+     we have several linked in. */
+  if(usb_pipeout(urb->pipe)) {
+    urb_priv->interval = MAX_INTR_INTERVAL;
+  }
+
+  /* Calculate amount of EPs needed */
+  ep_count = MAX_INTR_INTERVAL / urb_priv->interval;
+
+  for(i = 0; i < ep_count; i++) {
+    ep_desc = create_ep(urb_priv->epid, urb_priv->first_sb, mem_flags);
+    if(ep_desc == NULL) {
+      /* Free any descriptors that we may have allocated before failure */
+      while(i > 0) {
+	i--;
+	kfree(urb_priv->intr_ep_pool[i]);
+      }
+      return -ENOMEM;
+    }
+    urb_priv->intr_ep_pool[i] = ep_desc;
+  }
+  urb_priv->intr_ep_pool_length = ep_count;
+  return 0;
+}
+
+/* DMA RX/TX functions */
+/* ----------------------- */
+
+static void tc_dma_init_rx_list(void) {
+  int i;
+
+  /* Setup descriptor list except last one */
+  for (i = 0; i < (NBR_OF_RX_DESC - 1); i++) {
+    RxDescList[i].sw_len = RX_DESC_BUF_SIZE;
+    RxDescList[i].command = 0;
+    RxDescList[i].next = virt_to_phys(&RxDescList[i + 1]);
+    RxDescList[i].buf = virt_to_phys(RxBuf + (i * RX_DESC_BUF_SIZE));
+    RxDescList[i].hw_len = 0;
+    RxDescList[i].status = 0;
+    
+    /* DMA IN cache bug. (struct etrax_dma_descr has the same layout as
+       USB_IN_Desc for the relevant fields.) */
+    prepare_rx_descriptor((struct etrax_dma_descr*)&RxDescList[i]);
+    
+  }
+  /* Special handling of last descriptor */
+  RxDescList[i].sw_len = RX_DESC_BUF_SIZE;
+  RxDescList[i].command = IO_STATE(USB_IN_command, eol, yes);
+  RxDescList[i].next = virt_to_phys(&RxDescList[0]);
+  RxDescList[i].buf = virt_to_phys(RxBuf + (i * RX_DESC_BUF_SIZE));
+  RxDescList[i].hw_len = 0;
+  RxDescList[i].status = 0;
+  
+  /* Setup list pointers that show progress in list */
+  myNextRxDesc = &RxDescList[0];
+  myLastRxDesc = &RxDescList[NBR_OF_RX_DESC - 1];
+  
+  flush_etrax_cache();
+  /* Point DMA to first descriptor in list and start it */
+  *R_DMA_CH9_FIRST = virt_to_phys(myNextRxDesc);
+  *R_DMA_CH9_CMD = IO_STATE(R_DMA_CH9_CMD, cmd, start);
+}
+
+
+static void tc_dma_init_tx_bulk_list(void) {
+  int i;
+  volatile struct USB_EP_Desc *epDescr;
+
+  for (i = 0; i < (NBR_OF_EPIDS - 1); i++) {
+    epDescr = &(TxBulkEPList[i]);
+    CHECK_ALIGN(epDescr);
+    epDescr->hw_len = 0;
+    epDescr->command = IO_FIELD(USB_EP_command, epid, i);
+    epDescr->sub = 0;
+    epDescr->next = virt_to_phys(&TxBulkEPList[i + 1]);
+
+    /* Initiate two EPs, disabled and with the eol flag set. No need for any
+       preserved epid. */
+    
+    /* The first one has the intr flag set so we get an interrupt when the DMA
+       channel is about to become disabled. */
+    CHECK_ALIGN(&TxBulkDummyEPList[i][0]);
+    TxBulkDummyEPList[i][0].hw_len = 0;
+    TxBulkDummyEPList[i][0].command = (IO_FIELD(USB_EP_command, epid, DUMMY_EPID) |
+				       IO_STATE(USB_EP_command, eol, yes) |
+				       IO_STATE(USB_EP_command, intr, yes));
+    TxBulkDummyEPList[i][0].sub = 0;
+    TxBulkDummyEPList[i][0].next = virt_to_phys(&TxBulkDummyEPList[i][1]);
+    
+    /* The second one. */
+    CHECK_ALIGN(&TxBulkDummyEPList[i][1]);
+    TxBulkDummyEPList[i][1].hw_len = 0;
+    TxBulkDummyEPList[i][1].command = (IO_FIELD(USB_EP_command, epid, DUMMY_EPID) |
+				       IO_STATE(USB_EP_command, eol, yes));
+    TxBulkDummyEPList[i][1].sub = 0;
+    /* The last dummy's next pointer is the same as the current EP's next pointer. */
+    TxBulkDummyEPList[i][1].next = virt_to_phys(&TxBulkEPList[i + 1]);
+  }
+
+  /* Special handling of last descr in list, make list circular */
+  epDescr = &TxBulkEPList[i];
+  CHECK_ALIGN(epDescr);
+  epDescr->hw_len = 0;
+  epDescr->command = IO_STATE(USB_EP_command, eol, yes) |
+    IO_FIELD(USB_EP_command, epid, i);
+  epDescr->sub = 0;
+  epDescr->next = virt_to_phys(&TxBulkEPList[0]);
+  
+  /* Init DMA sub-channel pointers to last item in each list */
+  *R_DMA_CH8_SUB0_EP = virt_to_phys(&TxBulkEPList[i]);
+  /* No point in starting the bulk channel yet.
+   *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start); */
+}
+
+static void tc_dma_init_tx_ctrl_list(void) {
+  int i;
+  volatile struct USB_EP_Desc *epDescr;
+
+  for (i = 0; i < (NBR_OF_EPIDS - 1); i++) {
+    epDescr = &(TxCtrlEPList[i]);
+    CHECK_ALIGN(epDescr);
+    epDescr->hw_len = 0;
+    epDescr->command = IO_FIELD(USB_EP_command, epid, i);
+    epDescr->sub = 0;
+    epDescr->next = virt_to_phys(&TxCtrlEPList[i + 1]);
+  }
+  /* Special handling of last descr in list, make list circular */
+  epDescr = &TxCtrlEPList[i];
+  CHECK_ALIGN(epDescr);
+  epDescr->hw_len = 0;
+  epDescr->command = IO_STATE(USB_EP_command, eol, yes) |
+    IO_FIELD(USB_EP_command, epid, i);
+  epDescr->sub = 0;
+  epDescr->next = virt_to_phys(&TxCtrlEPList[0]);
+  
+  /* Init DMA sub-channel pointers to last item in each list */
+  *R_DMA_CH8_SUB1_EP = virt_to_phys(&TxCtrlEPList[i]);
+  /* No point in starting the ctrl channel yet.
+   *R_DMA_CH8_SUB1_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start); */
+}
+
+
+static void tc_dma_init_tx_intr_list(void) {
+  int i;
+
+  TxIntrSB_zout.sw_len = 1;
+  TxIntrSB_zout.next = 0;
+  TxIntrSB_zout.buf = virt_to_phys(&zout_buffer[0]);
+  TxIntrSB_zout.command = (IO_FIELD(USB_SB_command, rem, 0) |
+			   IO_STATE(USB_SB_command, tt, zout) |
+			   IO_STATE(USB_SB_command, full, yes) |
+			   IO_STATE(USB_SB_command, eot, yes) |
+			   IO_STATE(USB_SB_command, eol, yes));
+  
+  for (i = 0; i < (MAX_INTR_INTERVAL - 1); i++) {
+    CHECK_ALIGN(&TxIntrEPList[i]);
+    TxIntrEPList[i].hw_len = 0;
+    TxIntrEPList[i].command =
+      (IO_STATE(USB_EP_command, eof, yes) |
+       IO_STATE(USB_EP_command, enable, yes) |
+       IO_FIELD(USB_EP_command, epid, INVALID_EPID));
+    TxIntrEPList[i].sub = virt_to_phys(&TxIntrSB_zout);
+    TxIntrEPList[i].next = virt_to_phys(&TxIntrEPList[i + 1]);
+  }
+
+  /* Special handling of last descr in list, make list circular */
+  CHECK_ALIGN(&TxIntrEPList[i]);
+  TxIntrEPList[i].hw_len = 0;
+  TxIntrEPList[i].command =
+    (IO_STATE(USB_EP_command, eof, yes) |
+     IO_STATE(USB_EP_command, eol, yes) |
+     IO_STATE(USB_EP_command, enable, yes) |
+     IO_FIELD(USB_EP_command, epid, INVALID_EPID));
+  TxIntrEPList[i].sub = virt_to_phys(&TxIntrSB_zout);
+  TxIntrEPList[i].next = virt_to_phys(&TxIntrEPList[0]);
+
+  intr_dbg("Initiated Intr EP descriptor list\n");
+
+
+  /* Connect DMA 8 sub-channel 2 to first in list */
+  *R_DMA_CH8_SUB2_EP = virt_to_phys(&TxIntrEPList[0]);
+}
+
+static void tc_dma_init_tx_isoc_list(void) {
+  int i;
+
+  DBFENTER;
+
+  /* Read comment at zout_buffer declaration for an explanation to this. */
+  TxIsocSB_zout.sw_len = 1;
+  TxIsocSB_zout.next = 0;
+  TxIsocSB_zout.buf = virt_to_phys(&zout_buffer[0]);
+  TxIsocSB_zout.command = (IO_FIELD(USB_SB_command, rem, 0) |
+			   IO_STATE(USB_SB_command, tt, zout) |
+			   IO_STATE(USB_SB_command, full, yes) |
+			   IO_STATE(USB_SB_command, eot, yes) |
+			   IO_STATE(USB_SB_command, eol, yes));
+
+  /* The last isochronous EP descriptor is a dummy. */
+  for (i = 0; i < (NBR_OF_EPIDS - 1); i++) {
+    CHECK_ALIGN(&TxIsocEPList[i]);
+    TxIsocEPList[i].hw_len = 0;
+    TxIsocEPList[i].command = IO_FIELD(USB_EP_command, epid, i);
+    TxIsocEPList[i].sub = 0;
+    TxIsocEPList[i].next = virt_to_phys(&TxIsocEPList[i + 1]);
+  }
+
+  CHECK_ALIGN(&TxIsocEPList[i]);
+  TxIsocEPList[i].hw_len = 0;
+
+  /* Must enable the last EP descr to get eof interrupt. */
+  TxIsocEPList[i].command = (IO_STATE(USB_EP_command, enable, yes) |
+			     IO_STATE(USB_EP_command, eof, yes) |
+			     IO_STATE(USB_EP_command, eol, yes) |
+			     IO_FIELD(USB_EP_command, epid, INVALID_EPID));
+  TxIsocEPList[i].sub = virt_to_phys(&TxIsocSB_zout);
+  TxIsocEPList[i].next = virt_to_phys(&TxIsocEPList[0]);
+
+  *R_DMA_CH8_SUB3_EP = virt_to_phys(&TxIsocEPList[0]);
+  *R_DMA_CH8_SUB3_CMD = IO_STATE(R_DMA_CH8_SUB3_CMD, cmd, start);
+}
+
+static int tc_dma_init(struct usb_hcd *hcd) {
+  tc_dma_init_rx_list();
+  tc_dma_init_tx_bulk_list();
+  tc_dma_init_tx_ctrl_list();
+  tc_dma_init_tx_intr_list();
+  tc_dma_init_tx_isoc_list();
+
+  if (cris_request_dma(USB_TX_DMA_NBR,
+		       "ETRAX 100LX built-in USB (Tx)",
+		       DMA_VERBOSE_ON_ERROR,
+		       dma_usb)) {
+    err("Could not allocate DMA ch 8 for USB");
+    return -EBUSY;
+  }
+ 	
+  if (cris_request_dma(USB_RX_DMA_NBR,
+		       "ETRAX 100LX built-in USB (Rx)",
+		       DMA_VERBOSE_ON_ERROR,
+		       dma_usb)) {
+    err("Could not allocate DMA ch 9 for USB");
+    return -EBUSY;
+  }
+
+  *R_IRQ_MASK2_SET =
+    /* Note that these interrupts are not used. */
+    IO_STATE(R_IRQ_MASK2_SET, dma8_sub0_descr, set) |
+    /* Sub channel 1 (ctrl) descr. interrupts are used. */
+    IO_STATE(R_IRQ_MASK2_SET, dma8_sub1_descr, set) |
+    IO_STATE(R_IRQ_MASK2_SET, dma8_sub2_descr, set) |
+    /* Sub channel 3 (isoc) descr. interrupts are used. */
+    IO_STATE(R_IRQ_MASK2_SET, dma8_sub3_descr, set);
+  
+  /* Note that the dma9_descr interrupt is not used. */
+  *R_IRQ_MASK2_SET =
+    IO_STATE(R_IRQ_MASK2_SET, dma9_eop, set) |
+    IO_STATE(R_IRQ_MASK2_SET, dma9_descr, set);
+
+  if (request_irq(ETRAX_USB_RX_IRQ, tc_dma_rx_interrupt, 0,
+		  "ETRAX 100LX built-in USB (Rx)", hcd)) {
+    err("Could not allocate IRQ %d for USB", ETRAX_USB_RX_IRQ);
+    return -EBUSY;
+  }
+  
+  if (request_irq(ETRAX_USB_TX_IRQ, tc_dma_tx_interrupt, 0,
+		  "ETRAX 100LX built-in USB (Tx)", hcd)) {
+    err("Could not allocate IRQ %d for USB", ETRAX_USB_TX_IRQ);
+    return -EBUSY;
+  }
+
+  return 0;
+}
+
+static void tc_dma_destroy(void) {
+  free_irq(ETRAX_USB_RX_IRQ, NULL);
+  free_irq(ETRAX_USB_TX_IRQ, NULL);
+
+  cris_free_dma(USB_TX_DMA_NBR, "ETRAX 100LX built-in USB (Tx)");
+  cris_free_dma(USB_RX_DMA_NBR, "ETRAX 100LX built-in USB (Rx)");
+
+}
+
+static void tc_dma_link_intr_urb(struct urb *urb);
+
+/* Handle processing of Bulk, Ctrl and Intr queues */
+static void tc_dma_process_queue(int epid) {
+  struct urb *urb;
+  struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+  unsigned long flags;
+  char toggle;
+
+  if(epid_state[epid].disabled) {
+    /* Don't process any URBs on a disabled endpoint */
+    return;
+  }
+
+  /* Do not disturb us while fiddling with EPs and epids */
+  local_irq_save(flags);
+
+  /* For bulk, Ctrl and Intr can we only have one URB active at a time for
+     a specific EP. */
+  if(activeUrbList[epid] != NULL) {
+    /* An URB is already active on EP, skip checking queue */
+    local_irq_restore(flags);
+    return;
+  }
+
+  urb = urb_list_first(epid);
+  if(urb == NULL) {
+    /* No URB waiting in EP queue. Nothing do to */
+    local_irq_restore(flags);
+    return;
+  }
+
+  urb_priv = urb->hcpriv;
+  ASSERT(urb_priv != NULL);
+  ASSERT(urb_priv->urb_state == NOT_STARTED);
+  ASSERT(!usb_pipeisoc(urb->pipe));
+
+  /* Remove this URB from the queue and move it to active */
+  activeUrbList[epid] = urb;
+  urb_list_del(urb, epid);
+
+  urb_priv->urb_state = STARTED;
+
+  /* Reset error counters (regardless of which direction this traffic is). */
+  etrax_epid_clear_error(epid);
+
+  /* Special handling of Intr EP lists */
+  if(usb_pipeint(urb->pipe)) {
+    tc_dma_link_intr_urb(urb);
+    local_irq_restore(flags);
+    return;
+  }
+
+  /* Software must preset the toggle bits for Bulk and Ctrl */
+  if(usb_pipecontrol(urb->pipe)) {
+    /* Toggle bits are initialized only during setup transaction in a
+       CTRL transfer */
+    etrax_epid_set_toggle(epid, 0, 0);
+    etrax_epid_set_toggle(epid, 1, 0);
+  } else {
+    toggle = usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
+			   usb_pipeout(urb->pipe));
+    etrax_epid_set_toggle(epid, usb_pipeout(urb->pipe), toggle);
+  }
+
+  tc_dbg("Added SBs from (URB:0x%x %s %s) to epid %d: %s\n",
+	 (unsigned int)urb, str_dir(urb->pipe), str_type(urb->pipe), epid,
+	 sblist_to_str(urb_priv->first_sb));
+
+  /* We start the DMA sub channel without checking if it's running or not,
+     because:
+     1) If it's already running, issuing the start command is a nop.
+     2) We avoid a test-and-set race condition. */
+  switch(usb_pipetype(urb->pipe)) {
+  case PIPE_BULK:
+    /* Assert that the EP descriptor is disabled. */
+    ASSERT(!(TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)));
+
+    /* Set up and enable the EP descriptor. */
+    TxBulkEPList[epid].sub = virt_to_phys(urb_priv->first_sb);
+    TxBulkEPList[epid].hw_len = 0;
+    TxBulkEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
+
+    /* Check if the dummy list is already with us (if several urbs were queued). */
+    if (usb_pipein(urb->pipe) && (TxBulkEPList[epid].next != virt_to_phys(&TxBulkDummyEPList[epid][0]))) {
+      tc_dbg("Inviting dummy list to the party for urb 0x%lx, epid %d", 
+	     (unsigned long)urb, epid);
+      
+      /* We don't need to check if the DMA is at this EP or not before changing the
+	 next pointer, since we will do it in one 32-bit write (EP descriptors are
+	 32-bit aligned). */
+      TxBulkEPList[epid].next = virt_to_phys(&TxBulkDummyEPList[epid][0]);
+    }
+
+    restart_dma8_sub0();
+
+    /* Update/restart the bulk start timer since we just started the channel.*/
+    mod_timer(&bulk_start_timer, jiffies + BULK_START_TIMER_INTERVAL);
+    /* Update/restart the bulk eot timer since we just inserted traffic. */
+    mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL);
+    break;
+  case PIPE_CONTROL:
+    /* Assert that the EP descriptor is disabled. */
+    ASSERT(!(TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)));
+
+    /* Set up and enable the EP descriptor. */
+    TxCtrlEPList[epid].sub = virt_to_phys(urb_priv->first_sb);
+    TxCtrlEPList[epid].hw_len = 0;
+    TxCtrlEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
+
+    *R_DMA_CH8_SUB1_CMD = IO_STATE(R_DMA_CH8_SUB1_CMD, cmd, start);
+    break;
+  }
+  local_irq_restore(flags);
+}
+
+static void tc_dma_link_intr_urb(struct urb *urb) {
+  struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+  volatile struct USB_EP_Desc *tmp_ep;
+  struct USB_EP_Desc *ep_desc;
+  int i = 0, epid;
+  int pool_idx = 0;
+
+  ASSERT(urb_priv != NULL);
+  epid = urb_priv->epid;
+  ASSERT(urb_priv->interval > 0);
+  ASSERT(urb_priv->intr_ep_pool_length > 0);
+
+  tmp_ep = &TxIntrEPList[0];
+
+  /* Only insert one EP descriptor in list for Out Intr URBs.
+     We can only handle Out Intr with interval of 128ms because
+     it's not possible to insert several Out Intr EPs because they
+     are not consumed by the DMA. */
+  if(usb_pipeout(urb->pipe)) {
+    ep_desc = urb_priv->intr_ep_pool[0];
+    ASSERT(ep_desc);
+    ep_desc->next = tmp_ep->next;
+    tmp_ep->next = virt_to_phys(ep_desc);
+    i++;
+  } else {
+    /* Loop through Intr EP descriptor list and insert EP for URB at
+       specified interval */
+    do {
+      /* Each EP descriptor with eof flag sat signals a new frame */
+      if (tmp_ep->command & IO_MASK(USB_EP_command, eof)) {
+	/* Insert a EP from URBs EP pool at correct interval */
+	if ((i % urb_priv->interval) == 0) {
+	  ep_desc = urb_priv->intr_ep_pool[pool_idx];
+	  ASSERT(ep_desc);
+	  ep_desc->next = tmp_ep->next;
+	  tmp_ep->next = virt_to_phys(ep_desc);
+	  pool_idx++;
+	  ASSERT(pool_idx <= urb_priv->intr_ep_pool_length);
+	}
+	i++;
+      }
+      tmp_ep = (struct USB_EP_Desc *)phys_to_virt(tmp_ep->next);
+    } while(tmp_ep != &TxIntrEPList[0]);
+  }
+
+  intr_dbg("Added SBs to intr epid %d: %s interval:%d (%d EP)\n", epid,
+	   sblist_to_str(urb_priv->first_sb), urb_priv->interval, pool_idx);
+
+  /* We start the DMA sub channel without checking if it's running or not,
+     because:
+     1) If it's already running, issuing the start command is a nop.
+     2) We avoid a test-and-set race condition. */
+  *R_DMA_CH8_SUB2_CMD = IO_STATE(R_DMA_CH8_SUB2_CMD, cmd, start);
+}
+
+static void tc_dma_process_isoc_urb(struct urb *urb) {
+  unsigned long flags;
+  struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+  int epid;
+
+  /* Do not disturb us while fiddling with EPs and epids */
+  local_irq_save(flags);
+
+  ASSERT(urb_priv);
+  ASSERT(urb_priv->first_sb);
+  epid = urb_priv->epid;
+
+  if(activeUrbList[epid] == NULL) {
+    /* EP is idle, so make this URB active */
+    activeUrbList[epid] = urb;
+    urb_list_del(urb, epid);
+    ASSERT(TxIsocEPList[epid].sub == 0);
+    ASSERT(!(TxIsocEPList[epid].command &
+	     IO_STATE(USB_EP_command, enable, yes)));
+
+    /* Differentiate between In and Out Isoc. Because In SBs are not consumed*/
+    if(usb_pipein(urb->pipe)) {
+    /* Each EP for In Isoc will have only one SB descriptor, setup when
+       submitting the first active urb. We do it here by copying from URBs
+       pre-allocated SB. */
+      memcpy((void *)&(TxIsocSBList[epid]), urb_priv->first_sb,
+	     sizeof(TxIsocSBList[epid]));
+      TxIsocEPList[epid].hw_len = 0;
+      TxIsocEPList[epid].sub = virt_to_phys(&(TxIsocSBList[epid]));
+    } else {
+      /* For Out Isoc we attach the pre-allocated list of SBs for the URB */
+      TxIsocEPList[epid].hw_len = 0;
+      TxIsocEPList[epid].sub = virt_to_phys(urb_priv->first_sb);
+
+      isoc_dbg("Attached first URB:0x%x[%d] to epid:%d first_sb:0x%x"
+	       " last_sb::0x%x\n",
+	       (unsigned int)urb, urb_priv->urb_num, epid,
+	       (unsigned int)(urb_priv->first_sb),
+	       (unsigned int)(urb_priv->last_sb));
+    }
+
+    if (urb->transfer_flags & URB_ISO_ASAP) {
+      /* The isoc transfer should be started as soon as possible. The
+	 start_frame field is a return value if URB_ISO_ASAP was set. Comparing
+	 R_USB_FM_NUMBER with a USB Chief trace shows that the first isoc IN
+	 token is sent 2 frames later. I'm not sure how this affects usage of
+	 the start_frame field by the device driver, or how it affects things
+	 when USB_ISO_ASAP is not set, so therefore there's no compensation for
+	 the 2 frame "lag" here. */
+      urb->start_frame = (*R_USB_FM_NUMBER & 0x7ff);
+      TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes);
+      urb_priv->urb_state = STARTED;
+      isoc_dbg("URB_ISO_ASAP set, urb->start_frame set to %d\n",
+	       urb->start_frame);
+    } else {
+      /* Not started yet. */
+      urb_priv->urb_state = NOT_STARTED;
+      isoc_warn("urb_priv->urb_state set to NOT_STARTED for URB:0x%x\n",
+		(unsigned int)urb);
+    }
+
+  } else {
+    /* An URB is already active on the EP. Leave URB in queue and let
+       finish_isoc_urb process it after current active URB */
+    ASSERT(TxIsocEPList[epid].sub != 0);
+
+    if(usb_pipein(urb->pipe)) {
+      /* Because there already is a active In URB on this epid we do nothing
+         and the finish_isoc_urb() function will handle switching to next URB*/
+
+    } else { /* For Out Isoc, insert new URBs traffic last in SB-list. */
+      struct USB_SB_Desc *temp_sb_desc;
+
+      /* Set state STARTED to all Out Isoc URBs added to SB list because we
+         don't know how many of them that are finished before descr interrupt*/
+      urb_priv->urb_state = STARTED;
+
+      /* Find end of current SB list by looking for SB with eol flag sat */
+      temp_sb_desc = phys_to_virt(TxIsocEPList[epid].sub);
+      while ((temp_sb_desc->command & IO_MASK(USB_SB_command, eol)) !=
+	     IO_STATE(USB_SB_command, eol, yes)) {
+	ASSERT(temp_sb_desc->next);
+	temp_sb_desc = phys_to_virt(temp_sb_desc->next);
+      }
+
+      isoc_dbg("Appended URB:0x%x[%d] (first:0x%x last:0x%x) to epid:%d"
+	       " sub:0x%x eol:0x%x\n",
+	       (unsigned int)urb, urb_priv->urb_num,
+	       (unsigned int)(urb_priv->first_sb),
+	       (unsigned int)(urb_priv->last_sb), epid,
+	       (unsigned int)phys_to_virt(TxIsocEPList[epid].sub),
+	       (unsigned int)temp_sb_desc);
+
+      /* Next pointer must be set before eol is removed. */
+      temp_sb_desc->next = virt_to_phys(urb_priv->first_sb);
+      /* Clear the previous end of list flag since there is a new in the
+	 added SB descriptor list. */
+      temp_sb_desc->command &= ~IO_MASK(USB_SB_command, eol);
+
+      if (!(TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable))) {
+	__u32 epid_data;
+	/* 8.8.5 in Designer's Reference says we should check for and correct
+	   any errors in the EP here.  That should not be necessary if
+	   epid_attn is handled correctly, so we assume all is ok. */
+	epid_data = etrax_epid_iso_get(epid);
+	if (IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data) !=
+	    IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) {
+	  isoc_err("Disabled Isoc EP with error:%d on epid:%d when appending"
+		   " URB:0x%x[%d]\n",
+		   IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data), epid,
+		   (unsigned int)urb, urb_priv->urb_num);
+	}
+
+	/* The SB list was exhausted. */
+	if (virt_to_phys(urb_priv->last_sb) != TxIsocEPList[epid].sub) {
+	  /* The new sublist did not get processed before the EP was
+	     disabled.  Setup the EP again. */
+
+	  if(virt_to_phys(temp_sb_desc) == TxIsocEPList[epid].sub) {
+	    isoc_dbg("EP for epid:%d stoped at SB:0x%x before newly inserted"
+		     ", restarting from this URBs SB:0x%x\n",
+		     epid, (unsigned int)temp_sb_desc,
+		     (unsigned int)(urb_priv->first_sb));
+	    TxIsocEPList[epid].hw_len = 0;
+	    TxIsocEPList[epid].sub = virt_to_phys(urb_priv->first_sb);
+	    urb->start_frame = (*R_USB_FM_NUMBER & 0x7ff);
+	    /* Enable the EP again so data gets processed this time */
+	    TxIsocEPList[epid].command |=
+	      IO_STATE(USB_EP_command, enable, yes);
+
+	  } else {
+	    /* The EP has been disabled but not at end this URB (god knows
+	       where). This should generate an epid_attn so we should not be
+	       here */
+	    isoc_warn("EP was disabled on sb:0x%x before SB list for"
+		     " URB:0x%x[%d] got processed\n",
+		     (unsigned int)phys_to_virt(TxIsocEPList[epid].sub),
+		     (unsigned int)urb, urb_priv->urb_num);
+	  }
+	} else {
+	  /* This might happend if we are slow on this function and isn't
+	     an error. */
+	  isoc_dbg("EP was disabled and finished with SBs from appended"
+		   " URB:0x%x[%d]\n", (unsigned int)urb, urb_priv->urb_num);
+	}
+      }
+    }
+  }
+  
+  /* Start the DMA sub channel */
+  *R_DMA_CH8_SUB3_CMD = IO_STATE(R_DMA_CH8_SUB3_CMD, cmd, start);
+
+  local_irq_restore(flags);
+}
+
+static void tc_dma_unlink_intr_urb(struct urb *urb) {
+  struct crisv10_urb_priv *urb_priv = urb->hcpriv;
+  volatile struct USB_EP_Desc *first_ep;  /* First EP in the list. */
+  volatile struct USB_EP_Desc *curr_ep;   /* Current EP, the iterator. */
+  volatile struct USB_EP_Desc *next_ep;   /* The EP after current. */
+  volatile struct USB_EP_Desc *unlink_ep; /* The one we should remove from
+					     the list. */
+  int count = 0;
+  volatile int timeout = 10000;
+  int epid;
+
+  /* Read 8.8.4 in Designer's Reference, "Removing an EP Descriptor from the
+     List". */
+  ASSERT(urb_priv);
+  ASSERT(urb_priv->intr_ep_pool_length > 0);
+  epid = urb_priv->epid;
+
+  /* First disable all Intr EPs belonging to epid for this URB */
+  first_ep = &TxIntrEPList[0];
+  curr_ep = first_ep;
+  do {
+    next_ep = (struct USB_EP_Desc *)phys_to_virt(curr_ep->next);
+    if (IO_EXTRACT(USB_EP_command, epid, next_ep->command) == epid) {
+      /* Disable EP */
+      next_ep->command &= ~IO_MASK(USB_EP_command, enable);
+    }
+    curr_ep = phys_to_virt(curr_ep->next);
+  } while (curr_ep != first_ep);
+
+
+  /* Now unlink all EPs belonging to this epid from Descr list */
+  first_ep = &TxIntrEPList[0];
+  curr_ep = first_ep;
+  do {
+    next_ep = (struct USB_EP_Desc *)phys_to_virt(curr_ep->next);
+    if (IO_EXTRACT(USB_EP_command, epid, next_ep->command) == epid) {
+      /* This is the one we should unlink. */
+      unlink_ep = next_ep;
+
+      /* Actually unlink the EP from the DMA list. */
+      curr_ep->next = unlink_ep->next;
+
+      /* Wait until the DMA is no longer at this descriptor. */
+      while((*R_DMA_CH8_SUB2_EP == virt_to_phys(unlink_ep)) &&
+	    (timeout-- > 0));
+      if(timeout == 0) {
+	warn("Timeout while waiting for DMA-TX-Intr to leave unlink EP\n");
+      }
+      
+      count++;
+    }
+    curr_ep = phys_to_virt(curr_ep->next);
+  } while (curr_ep != first_ep);
+
+  if(count != urb_priv->intr_ep_pool_length) {
+    intr_warn("Unlinked %d of %d Intr EPs for URB:0x%x[%d]\n", count,
+	      urb_priv->intr_ep_pool_length, (unsigned int)urb,
+	      urb_priv->urb_num);
+  } else {
+    intr_dbg("Unlinked %d of %d interrupt EPs for URB:0x%x\n", count,
+	     urb_priv->intr_ep_pool_length, (unsigned int)urb);
+  }
+}
+
+static void check_finished_bulk_tx_epids(struct usb_hcd *hcd,
+						    int timer) {
+  unsigned long flags;
+  int epid;
+  struct urb *urb;
+  struct crisv10_urb_priv * urb_priv;
+  __u32 epid_data;
+
+  /* Protect TxEPList */
+  local_irq_save(flags);
+
+  for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
+    /* A finished EP descriptor is disabled and has a valid sub pointer */
+    if (!(TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) &&
+	(TxBulkEPList[epid].sub != 0)) {
+
+      /* Get the active URB for this epid */
+      urb = activeUrbList[epid];
+      /* Sanity checks */
+      ASSERT(urb);
+      urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+      ASSERT(urb_priv);
+      
+      /* Only handle finished out Bulk EPs here,
+	 and let RX interrupt take care of the rest */
+      if(!epid_out_traffic(epid)) {
+	continue;
+      }
+
+      if(timer) {
+	tc_warn("Found finished %s Bulk epid:%d URB:0x%x[%d] from timeout\n",
+		epid_out_traffic(epid) ? "Out" : "In", epid, (unsigned int)urb,
+		urb_priv->urb_num);
+      } else {
+	tc_dbg("Found finished %s Bulk epid:%d URB:0x%x[%d] from interrupt\n",
+	       epid_out_traffic(epid) ? "Out" : "In", epid, (unsigned int)urb,
+	       urb_priv->urb_num);
+      }
+
+      if(urb_priv->urb_state == UNLINK) {
+	/* This Bulk URB is requested to be unlinked, that means that the EP
+	   has been disabled and we might not have sent all data */
+	tc_finish_urb(hcd, urb, urb->status);
+	continue;
+      }
+
+      ASSERT(urb_priv->urb_state == STARTED);
+      if (phys_to_virt(TxBulkEPList[epid].sub) != urb_priv->last_sb) {
+	tc_err("Endpoint got disabled before reaching last sb\n");
+      }
+	
+      epid_data = etrax_epid_get(epid);
+      if (IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data) ==
+	  IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) {
+	/* This means that the endpoint has no error, is disabled
+	   and had inserted traffic, i.e. transfer successfully completed. */
+	tc_finish_urb(hcd, urb, 0);
+      } else {
+	/* Shouldn't happen. We expect errors to be caught by epid
+	   attention. */
+	tc_err("Found disabled bulk EP desc (epid:%d error:%d)\n",
+	       epid, IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data));
+      }
+    } else {
+      tc_dbg("Ignoring In Bulk epid:%d, let RX interrupt handle it\n", epid);
+    }
+  }
+
+  local_irq_restore(flags);
+}
+
+static void check_finished_ctrl_tx_epids(struct usb_hcd *hcd) {
+  unsigned long flags;
+  int epid;
+  struct urb *urb;
+  struct crisv10_urb_priv * urb_priv;
+  __u32 epid_data;
+
+  /* Protect TxEPList */
+  local_irq_save(flags);
+
+  for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
+    if(epid == DUMMY_EPID)
+      continue;
+
+    /* A finished EP descriptor is disabled and has a valid sub pointer */
+    if (!(TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)) &&
+	(TxCtrlEPList[epid].sub != 0)) {
+      
+      /* Get the active URB for this epid */
+      urb = activeUrbList[epid];
+
+      if(urb == NULL) {
+	tc_warn("Found finished Ctrl epid:%d with no active URB\n", epid);
+	continue;
+      }
+      
+      /* Sanity checks */
+      ASSERT(usb_pipein(urb->pipe));
+      urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+      ASSERT(urb_priv);
+      if (phys_to_virt(TxCtrlEPList[epid].sub) != urb_priv->last_sb) {
+	tc_err("Endpoint got disabled before reaching last sb\n");
+      }
+
+      epid_data = etrax_epid_get(epid);
+      if (IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data) ==
+	  IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) {
+	/* This means that the endpoint has no error, is disabled
+	   and had inserted traffic, i.e. transfer successfully completed. */
+
+	/* Check if RX-interrupt for In Ctrl has been processed before
+	   finishing the URB */
+	if(urb_priv->ctrl_rx_done) {
+	  tc_dbg("Finishing In Ctrl URB:0x%x[%d] in tx_interrupt\n",
+		 (unsigned int)urb, urb_priv->urb_num);
+	  tc_finish_urb(hcd, urb, 0);
+	} else {
+	  /* If we get zout descriptor interrupt before RX was done for a
+	     In Ctrl transfer, then we flag that and it will be finished
+	     in the RX-Interrupt */
+	  urb_priv->ctrl_zout_done = 1;
+	  tc_dbg("Got zout descr interrupt before RX interrupt\n");
+	}
+      } else {
+	/* Shouldn't happen. We expect errors to be caught by epid
+	   attention. */
+	tc_err("Found disabled Ctrl EP desc (epid:%d URB:0x%x[%d]) error_code:%d\n", epid, (unsigned int)urb, urb_priv->urb_num, IO_EXTRACT(R_USB_EPT_DATA, error_code, epid_data));
+	__dump_ep_desc(&(TxCtrlEPList[epid]));
+	__dump_ept_data(epid);
+      }      
+    }
+  }
+  local_irq_restore(flags);
+}
+
+/* This function goes through all epids that are setup for Out Isoc transfers
+   and marks (isoc_out_done) all queued URBs that the DMA has finished
+   transfer for.
+   No URB completetion is done here to make interrupt routine return quickly.
+   URBs are completed later with help of complete_isoc_bottom_half() that
+   becomes schedules when this functions is finished. */
+static void check_finished_isoc_tx_epids(void) {
+  unsigned long flags;
+  int epid;
+  struct urb *urb;
+  struct crisv10_urb_priv * urb_priv;
+  struct USB_SB_Desc* sb_desc;
+  int epid_done;
+
+  /* Protect TxIsocEPList */
+  local_irq_save(flags);
+
+  for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
+    if (TxIsocEPList[epid].sub == 0 || epid == INVALID_EPID ||
+	!epid_out_traffic(epid)) {
+      /* Nothing here to see. */
+      continue;
+    }
+    ASSERT(epid_inuse(epid));
+    ASSERT(epid_isoc(epid));
+
+    sb_desc = phys_to_virt(TxIsocEPList[epid].sub);
+    /* Find the last descriptor of the currently active URB for this ep.
+       This is the first descriptor in the sub list marked for a descriptor
+       interrupt. */
+    while (sb_desc && !IO_EXTRACT(USB_SB_command, intr, sb_desc->command)) {
+      sb_desc = sb_desc->next ? phys_to_virt(sb_desc->next) : 0;
+    }
+    ASSERT(sb_desc);
+
+    isoc_dbg("Descr IRQ checking epid:%d sub:0x%x intr:0x%x\n",
+	     epid, (unsigned int)phys_to_virt(TxIsocEPList[epid].sub),
+	     (unsigned int)sb_desc);
+
+    urb = activeUrbList[epid];
+    if(urb == NULL) {
+      isoc_err("Isoc Descr irq on epid:%d with no active URB\n", epid);
+      continue;
+    }
+
+    epid_done = 0;
+    while(urb && !epid_done) {
+      /* Sanity check. */
+      ASSERT(usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS);
+      ASSERT(usb_pipeout(urb->pipe));
+      
+      urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+      ASSERT(urb_priv);
+      ASSERT(urb_priv->urb_state == STARTED ||
+	     urb_priv->urb_state == UNLINK);
+      
+      if (sb_desc != urb_priv->last_sb) {
+	/* This urb has been sent. */
+	urb_priv->isoc_out_done = 1;
+
+      } else { /* Found URB that has last_sb as the interrupt reason */
+
+	/* Check if EP has been disabled, meaning that all transfers are done*/
+	if(!(TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable))) {
+	  ASSERT((sb_desc->command & IO_MASK(USB_SB_command, eol)) ==
+		 IO_STATE(USB_SB_command, eol, yes));
+	  ASSERT(sb_desc->next == 0);
+	  urb_priv->isoc_out_done = 1;
+	} else {
+	  isoc_dbg("Skipping URB:0x%x[%d] because EP not disabled yet\n",
+		   (unsigned int)urb, urb_priv->urb_num);
+	}
+	/* Stop looking any further in queue */
+	epid_done = 1;	
+      }
+
+      if (!epid_done) {
+	if(urb == activeUrbList[epid]) {
+	  urb = urb_list_first(epid);
+	} else {
+	  urb = urb_list_next(urb, epid);
+	}
+      }
+    } /* END: while(urb && !epid_done) */
+  }
+
+  local_irq_restore(flags);
+}
+
+
+/* This is where the Out Isoc URBs are realy completed. This function is
+   scheduled from tc_dma_tx_interrupt() when one or more Out Isoc transfers
+   are done. This functions completes all URBs earlier marked with
+   isoc_out_done by fast interrupt routine check_finished_isoc_tx_epids() */
+
+static void complete_isoc_bottom_half(void *data) {
+  struct crisv10_isoc_complete_data *comp_data;
+  struct usb_iso_packet_descriptor *packet;
+  struct crisv10_urb_priv * urb_priv;
+  unsigned long flags;
+  struct urb* urb;
+  int epid_done;
+  int epid;
+  int i;
+
+  comp_data = (struct crisv10_isoc_complete_data*)data;
+
+  local_irq_save(flags);
+
+  for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) {
+    if(!epid_inuse(epid) || !epid_isoc(epid) || !epid_out_traffic(epid) || epid == DUMMY_EPID) {
+      /* Only check valid Out Isoc epids */
+      continue;
+    }
+
+    isoc_dbg("Isoc bottom-half checking epid:%d, sub:0x%x\n", epid,
+	     (unsigned int)phys_to_virt(TxIsocEPList[epid].sub));
+
+    /* The descriptor interrupt handler has marked all transmitted Out Isoc
+       URBs with isoc_out_done.  Now we traverse all epids and for all that
+       have out Isoc traffic we traverse its URB list and complete the
+       transmitted URBs. */
+    epid_done = 0;
+    while (!epid_done) {
+
+      /* Get the active urb (if any) */
+      urb = activeUrbList[epid];
+      if (urb == 0) {
+	isoc_dbg("No active URB on epid:%d anymore\n", epid);
+	epid_done = 1;
+	continue;
+      }
+
+      /* Sanity check. */
+      ASSERT(usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS);
+      ASSERT(usb_pipeout(urb->pipe));
+
+      urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+      ASSERT(urb_priv);
+
+      if (!(urb_priv->isoc_out_done)) {
+	/* We have reached URB that isn't flaged done yet, stop traversing. */
+	isoc_dbg("Stoped traversing Out Isoc URBs on epid:%d"
+		 " before not yet flaged URB:0x%x[%d]\n",
+		 epid, (unsigned int)urb, urb_priv->urb_num);
+	epid_done = 1;
+	continue;
+      }
+
+      /* This urb has been sent. */
+      isoc_dbg("Found URB:0x%x[%d] that is flaged isoc_out_done\n",
+	       (unsigned int)urb, urb_priv->urb_num);
+
+      /* Set ok on transfered packets for this URB and finish it */
+      for (i = 0; i < urb->number_of_packets; i++) {
+	packet = &urb->iso_frame_desc[i];
+	packet->status = 0;
+	packet->actual_length = packet->length;
+      }
+      urb_priv->isoc_packet_counter = urb->number_of_packets;
+      tc_finish_urb(comp_data->hcd, urb, 0);
+
+    } /* END: while(!epid_done) */
+  } /* END: for(epid...) */
+
+  local_irq_restore(flags);
+  kmem_cache_free(isoc_compl_cache, comp_data);
+}
+
+
+static void check_finished_intr_tx_epids(struct usb_hcd *hcd) {
+  unsigned long flags;
+  int epid;
+  struct urb *urb;
+  struct crisv10_urb_priv * urb_priv;
+  volatile struct USB_EP_Desc *curr_ep;   /* Current EP, the iterator. */
+  volatile struct USB_EP_Desc *next_ep;   /* The EP after current. */
+
+  /* Protect TxintrEPList */
+  local_irq_save(flags);
+
+  for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
+    if(!epid_inuse(epid) || !epid_intr(epid) || !epid_out_traffic(epid)) {
+      /* Nothing to see on this epid. Only check valid Out Intr epids */
+      continue;
+    }
+
+    urb = activeUrbList[epid];
+    if(urb == 0) {
+      intr_warn("Found Out Intr epid:%d with no active URB\n", epid);
+      continue;
+    }
+
+    /* Sanity check. */
+    ASSERT(usb_pipetype(urb->pipe) == PIPE_INTERRUPT);
+    ASSERT(usb_pipeout(urb->pipe));
+    
+    urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+    ASSERT(urb_priv);
+
+    /* Go through EPs between first and second sof-EP. It's here Out Intr EPs
+       are inserted.*/
+    curr_ep = &TxIntrEPList[0];
+    do {
+      next_ep = (struct USB_EP_Desc *)phys_to_virt(curr_ep->next);
+      if(next_ep == urb_priv->intr_ep_pool[0]) {
+	/* We found the Out Intr EP for this epid */
+	
+	/* Disable it so it doesn't get processed again */
+	next_ep->command &= ~IO_MASK(USB_EP_command, enable);
+
+	/* Finish the active Out Intr URB with status OK */
+	tc_finish_urb(hcd, urb, 0);
+      }
+      curr_ep = phys_to_virt(curr_ep->next);
+    } while (curr_ep != &TxIntrEPList[1]);
+
+  }
+  local_irq_restore(flags);
+}
+
+/* Interrupt handler for DMA8/IRQ24 with subchannels (called from hardware intr) */
+static irqreturn_t tc_dma_tx_interrupt(int irq, void *vhc) {
+  struct usb_hcd *hcd = (struct usb_hcd*)vhc;
+  ASSERT(hcd);
+
+  if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub0_descr)) {
+    /* Clear this interrupt */
+    *R_DMA_CH8_SUB0_CLR_INTR = IO_STATE(R_DMA_CH8_SUB0_CLR_INTR, clr_descr, do);
+    restart_dma8_sub0();
+  }
+
+  if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub1_descr)) {
+    /* Clear this interrupt */
+    *R_DMA_CH8_SUB1_CLR_INTR = IO_STATE(R_DMA_CH8_SUB1_CLR_INTR, clr_descr, do);
+    check_finished_ctrl_tx_epids(hcd);
+  }
+
+  if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub2_descr)) {
+    /* Clear this interrupt */
+    *R_DMA_CH8_SUB2_CLR_INTR = IO_STATE(R_DMA_CH8_SUB2_CLR_INTR, clr_descr, do);
+    check_finished_intr_tx_epids(hcd);
+  }
+
+  if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub3_descr)) {
+    struct crisv10_isoc_complete_data* comp_data;
+
+    /* Flag done Out Isoc for later completion */
+    check_finished_isoc_tx_epids();
+
+    /* Clear this interrupt */
+    *R_DMA_CH8_SUB3_CLR_INTR = IO_STATE(R_DMA_CH8_SUB3_CLR_INTR, clr_descr, do);
+    /* Schedule bottom half of Out Isoc completion function. This function
+       finishes the URBs marked with isoc_out_done */
+    comp_data = (struct crisv10_isoc_complete_data*)
+      kmem_cache_alloc(isoc_compl_cache, SLAB_ATOMIC);
+    ASSERT(comp_data != NULL);
+    comp_data ->hcd = hcd;
+
+    INIT_WORK(&comp_data->usb_bh, complete_isoc_bottom_half, comp_data);
+    schedule_work(&comp_data->usb_bh);
+  }
+
+  return IRQ_HANDLED;
+}
+
+/* Interrupt handler for DMA9/IRQ25 (called from hardware intr) */
+static irqreturn_t tc_dma_rx_interrupt(int irq, void *vhc) {
+  unsigned long flags;
+  struct urb *urb;
+  struct usb_hcd *hcd = (struct usb_hcd*)vhc;
+  struct crisv10_urb_priv *urb_priv;
+  int epid = 0;
+  int real_error;
+
+  ASSERT(hcd);
+
+  /* Clear this interrupt. */
+  *R_DMA_CH9_CLR_INTR = IO_STATE(R_DMA_CH9_CLR_INTR, clr_eop, do);
+
+  /* Custom clear interrupt for this interrupt */
+  /* The reason we cli here is that we call the driver's callback functions. */
+  local_irq_save(flags);
+
+  /* Note that this while loop assumes that all packets span only
+     one rx descriptor. */
+  while(myNextRxDesc->status & IO_MASK(USB_IN_status, eop)) {
+    epid = IO_EXTRACT(USB_IN_status, epid, myNextRxDesc->status);
+    /* Get the active URB for this epid */
+    urb = activeUrbList[epid];
+
+    ASSERT(epid_inuse(epid));
+    if (!urb) {
+      dma_err("No urb for epid %d in rx interrupt\n", epid);
+      goto skip_out;
+    }
+
+    /* Check if any errors on epid */
+    real_error = 0;
+    if (myNextRxDesc->status & IO_MASK(USB_IN_status, error)) {
+      __u32 r_usb_ept_data;
+
+      if (usb_pipeisoc(urb->pipe)) {
+	r_usb_ept_data = etrax_epid_iso_get(epid);
+	if((r_usb_ept_data & IO_MASK(R_USB_EPT_DATA_ISO, valid)) &&
+	   (IO_EXTRACT(R_USB_EPT_DATA_ISO, error_code, r_usb_ept_data) == 0) &&
+	   (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata))) {
+	  /* Not an error, just a failure to receive an expected iso
+	     in packet in this frame.  This is not documented
+	     in the designers reference. Continue processing.
+	  */
+	} else real_error = 1;
+      } else real_error = 1;
+    }
+
+    if(real_error) {
+      dma_err("Error in RX descr on epid:%d for URB 0x%x",
+	      epid, (unsigned int)urb);
+      dump_ept_data(epid);
+      dump_in_desc(myNextRxDesc);
+      goto skip_out;
+    }
+
+    urb_priv = (struct crisv10_urb_priv *)urb->hcpriv;
+    ASSERT(urb_priv);
+    ASSERT(urb_priv->urb_state == STARTED ||
+	   urb_priv->urb_state == UNLINK);
+
+    if ((usb_pipetype(urb->pipe) == PIPE_BULK) ||
+	(usb_pipetype(urb->pipe) == PIPE_CONTROL) ||
+	(usb_pipetype(urb->pipe) == PIPE_INTERRUPT)) {
+
+      /* We get nodata for empty data transactions, and the rx descriptor's
+	 hw_len field is not valid in that case. No data to copy in other
+	 words. */
+      if (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata)) {
+	/* No data to copy */
+      } else {
+	/*
+	dma_dbg("Processing RX for URB:0x%x epid:%d (data:%d ofs:%d)\n",
+		(unsigned int)urb, epid, myNextRxDesc->hw_len,
+		urb_priv->rx_offset);
+	*/
+	/* Only copy data if URB isn't flaged to be unlinked*/
+	if(urb_priv->urb_state != UNLINK) {
+	  /* Make sure the data fits in the buffer. */
+	  if(urb_priv->rx_offset + myNextRxDesc->hw_len
+	     <= urb->transfer_buffer_length) {
+
+	    /* Copy the data to URBs buffer */
+	    memcpy(urb->transfer_buffer + urb_priv->rx_offset,
+		   phys_to_virt(myNextRxDesc->buf), myNextRxDesc->hw_len);
+	    urb_priv->rx_offset += myNextRxDesc->hw_len;
+	  } else {
+	    /* Signal overflow when returning URB */
+	    urb->status = -EOVERFLOW;
+	    tc_finish_urb_later(hcd, urb, urb->status);
+	  }
+	}
+      }
+
+      /* Check if it was the last packet in the transfer */
+      if (myNextRxDesc->status & IO_MASK(USB_IN_status, eot)) {
+	/* Special handling for In Ctrl URBs. */
+	if(usb_pipecontrol(urb->pipe) && usb_pipein(urb->pipe) &&
+	   !(urb_priv->ctrl_zout_done)) {
+	  /* Flag that RX part of Ctrl transfer is done. Because zout descr
+	     interrupt hasn't happend yet will the URB be finished in the
+	     TX-Interrupt. */
+	  urb_priv->ctrl_rx_done = 1;
+	  tc_dbg("Not finishing In Ctrl URB:0x%x from rx_interrupt, waiting"
+		 " for zout\n", (unsigned int)urb);
+	} else {
+	  tc_finish_urb(hcd, urb, 0);
+	}
+      }
+    } else { /* ISOC RX */
+      /*
+      isoc_dbg("Processing RX for epid:%d (URB:0x%x) ISOC pipe\n",
+	       epid, (unsigned int)urb);
+      */
+
+      struct usb_iso_packet_descriptor *packet;
+
+      if (urb_priv->urb_state == UNLINK) {
+	isoc_warn("Ignoring Isoc Rx data for urb being unlinked.\n");
+	goto skip_out;
+      } else if (urb_priv->urb_state == NOT_STARTED) {
+	isoc_err("What? Got Rx data for Isoc urb that isn't started?\n");
+	goto skip_out;
+      }
+
+      packet = &urb->iso_frame_desc[urb_priv->isoc_packet_counter];
+      ASSERT(packet);
+      packet->status = 0;
+
+      if (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata)) {
+	/* We get nodata for empty data transactions, and the rx descriptor's
+	   hw_len field is not valid in that case. We copy 0 bytes however to
+	   stay in synch. */
+	packet->actual_length = 0;
+      } else {
+	packet->actual_length = myNextRxDesc->hw_len;
+	/* Make sure the data fits in the buffer. */
+	ASSERT(packet->actual_length <= packet->length);
+	memcpy(urb->transfer_buffer + packet->offset,
+	       phys_to_virt(myNextRxDesc->buf), packet->actual_length);
+	if(packet->actual_length > 0)
+	  isoc_dbg("Copied %d bytes, packet %d for URB:0x%x[%d]\n",
+		   packet->actual_length, urb_priv->isoc_packet_counter,
+		   (unsigned int)urb, urb_priv->urb_num);
+      }
+
+      /* Increment the packet counter. */
+      urb_priv->isoc_packet_counter++;
+
+      /* Note that we don't care about the eot field in the rx descriptor's
+	 status. It will always be set for isoc traffic. */
+      if (urb->number_of_packets == urb_priv->isoc_packet_counter) {
+	/* Complete the urb with status OK. */
+	tc_finish_urb(hcd, urb, 0);
+      }
+    }
+
+  skip_out:
+    myNextRxDesc->status = 0;
+    myNextRxDesc->command |= IO_MASK(USB_IN_command, eol);
+    myLastRxDesc->command &= ~IO_MASK(USB_IN_command, eol);
+    myLastRxDesc = myNextRxDesc;
+    myNextRxDesc = phys_to_virt(myNextRxDesc->next);
+    flush_etrax_cache();
+    *R_DMA_CH9_CMD = IO_STATE(R_DMA_CH9_CMD, cmd, restart);
+  }
+
+  local_irq_restore(flags);
+
+  return IRQ_HANDLED;
+}
+
+static void tc_bulk_start_timer_func(unsigned long dummy) {
+  /* We might enable an EP descriptor behind the current DMA position when
+     it's about to decide that there are no more bulk traffic and it should
+     stop the bulk channel.
+     Therefore we periodically check if the bulk channel is stopped and there
+     is an enabled bulk EP descriptor, in which case we start the bulk
+     channel. */
+  
+  if (!(*R_DMA_CH8_SUB0_CMD & IO_MASK(R_DMA_CH8_SUB0_CMD, cmd))) {
+    int epid;
+
+    timer_dbg("bulk_start_timer: Bulk DMA channel not running.\n");
+
+    for (epid = 0; epid < NBR_OF_EPIDS; epid++) {
+      if (TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) {
+	timer_warn("Found enabled EP for epid %d, starting bulk channel.\n",
+		   epid);
+	restart_dma8_sub0();
+
+	/* Restart the bulk eot timer since we just started the bulk channel.*/
+	mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL);
+
+	/* No need to search any further. */
+	break;
+      }
+    }
+  } else {
+    timer_dbg("bulk_start_timer: Bulk DMA channel running.\n");
+  }
+}
+
+static void tc_bulk_eot_timer_func(unsigned long dummy) {
+  struct usb_hcd *hcd = (struct usb_hcd*)dummy;
+  ASSERT(hcd);
+  /* Because of a race condition in the top half, we might miss a bulk eot.
+     This timer "simulates" a bulk eot if we don't get one for a while,
+     hopefully correcting the situation. */
+  timer_dbg("bulk_eot_timer timed out.\n");
+  check_finished_bulk_tx_epids(hcd, 1);
+}
+
+
+/*************************************************************/
+/*************************************************************/
+/* Device driver block                                       */
+/*************************************************************/
+/*************************************************************/
+
+/* Forward declarations for device driver functions */
+static int devdrv_hcd_probe(struct device *);
+static int devdrv_hcd_remove(struct device *);
+#ifdef CONFIG_PM
+static int devdrv_hcd_suspend(struct device *, u32, u32);
+static int devdrv_hcd_resume(struct device *, u32);
+#endif /* CONFIG_PM */
+
+/* the device */
+static struct platform_device *devdrv_hc_platform_device;
+
+/* device driver interface */
+static struct device_driver devdrv_hc_device_driver = {
+  .name =			(char *) hc_name,
+  .bus =			&platform_bus_type,
+
+  .probe =		devdrv_hcd_probe,
+  .remove =		devdrv_hcd_remove,
+
+#ifdef CONFIG_PM
+  .suspend =		devdrv_hcd_suspend,
+  .resume =		devdrv_hcd_resume,
+#endif /* CONFIG_PM */
+};
+
+/* initialize the host controller and driver  */
+static int __init_or_module devdrv_hcd_probe(struct device *dev)
+{
+  struct usb_hcd *hcd;
+  struct crisv10_hcd *crisv10_hcd;
+  int retval;
+
+  /* Check DMA burst length */
+  if(IO_EXTRACT(R_BUS_CONFIG, dma_burst, *R_BUS_CONFIG) !=
+     IO_STATE(R_BUS_CONFIG, dma_burst, burst32)) {
+    devdrv_err("Invalid DMA burst length in Etrax 100LX,"
+	       " needs to be 32\n");
+    return -EPERM;
+  }
+
+  hcd = usb_create_hcd(&crisv10_hc_driver, dev, dev->bus_id);
+  if (!hcd)
+    return -ENOMEM;
+
+  crisv10_hcd = hcd_to_crisv10_hcd(hcd);
+  spin_lock_init(&crisv10_hcd->lock);
+  crisv10_hcd->num_ports = num_ports();
+  crisv10_hcd->running = 0;
+
+  dev_set_drvdata(dev, crisv10_hcd);
+
+  devdrv_dbg("ETRAX USB IRQs HC:%d  RX:%d  TX:%d\n", ETRAX_USB_HC_IRQ,
+	  ETRAX_USB_RX_IRQ, ETRAX_USB_TX_IRQ);
+
+  /* Print out chip version read from registers */
+  int rev_maj = *R_USB_REVISION & IO_MASK(R_USB_REVISION, major);
+  int rev_min = *R_USB_REVISION & IO_MASK(R_USB_REVISION, minor);
+  if(rev_min == 0) {
+    devdrv_info("Etrax 100LX USB Revision %d v1,2\n", rev_maj);
+  } else {
+    devdrv_info("Etrax 100LX USB Revision %d v%d\n", rev_maj, rev_min);
+  }
+
+  devdrv_info("Bulk timer interval, start:%d eot:%d\n",
+	      BULK_START_TIMER_INTERVAL,
+	      BULK_EOT_TIMER_INTERVAL);
+
+
+  /* Init root hub data structures */
+  if(rh_init()) {
+    devdrv_err("Failed init data for Root Hub\n");
+    retval = -ENOMEM;
+  }
+
+  if(port_in_use(0)) {
+    if (cris_request_io_interface(if_usb_1, "ETRAX100LX USB-HCD")) {
+      printk(KERN_CRIT "usb-host: request IO interface usb1 failed");
+      retval = -EBUSY;
+      goto out;
+    }
+    devdrv_info("Claimed interface for USB physical port 1\n");
+  }
+  if(port_in_use(1)) {
+    if (cris_request_io_interface(if_usb_2, "ETRAX100LX USB-HCD")) {
+      /* Free first interface if second failed to be claimed */
+      if(port_in_use(0)) {
+	cris_free_io_interface(if_usb_1);
+      }
+      printk(KERN_CRIT "usb-host: request IO interface usb2 failed");
+      retval = -EBUSY;
+      goto out;
+    }
+    devdrv_info("Claimed interface for USB physical port 2\n");
+  }
+  
+  /* Init transfer controller structs and locks */
+  if((retval = tc_init(hcd)) != 0) {
+    goto out;
+  }
+
+  /* Attach interrupt functions for DMA and init DMA controller */
+  if((retval = tc_dma_init(hcd)) != 0) {
+    goto out;
+  }
+
+  /* Attach the top IRQ handler for USB controller interrupts */
+  if (request_irq(ETRAX_USB_HC_IRQ, crisv10_hcd_top_irq, 0,
+		  "ETRAX 100LX built-in USB (HC)", hcd)) {
+    err("Could not allocate IRQ %d for USB", ETRAX_USB_HC_IRQ);
+    retval = -EBUSY;
+    goto out;
+  }
+
+  /* iso_eof is only enabled when isoc traffic is running. */
+  *R_USB_IRQ_MASK_SET =
+    /* IO_STATE(R_USB_IRQ_MASK_SET, iso_eof, set) | */
+    IO_STATE(R_USB_IRQ_MASK_SET, bulk_eot, set) |
+    IO_STATE(R_USB_IRQ_MASK_SET, epid_attn, set) |
+    IO_STATE(R_USB_IRQ_MASK_SET, port_status, set) |
+    IO_STATE(R_USB_IRQ_MASK_SET, ctl_status, set);
+
+
+  crisv10_ready_wait();
+  /* Reset the USB interface. */
+  *R_USB_COMMAND =
+    IO_STATE(R_USB_COMMAND, port_sel, nop) |
+    IO_STATE(R_USB_COMMAND, port_cmd, reset) |
+    IO_STATE(R_USB_COMMAND, ctrl_cmd, reset);
+
+  /* Designer's Reference, p. 8 - 10 says we should Initate R_USB_FM_PSTART to
+     0x2A30 (10800), to guarantee that control traffic gets 10% of the
+     bandwidth, and periodic transfer may allocate the rest (90%).
+     This doesn't work though.
+     The value 11960 is chosen to be just after the SOF token, with a couple
+     of bit times extra for possible bit stuffing. */
+  *R_USB_FM_PSTART = IO_FIELD(R_USB_FM_PSTART, value, 11960);
+
+  crisv10_ready_wait();
+  /* Configure the USB interface as a host controller. */
+  *R_USB_COMMAND =
+    IO_STATE(R_USB_COMMAND, port_sel, nop) |
+    IO_STATE(R_USB_COMMAND, port_cmd, reset) |
+    IO_STATE(R_USB_COMMAND, ctrl_cmd, host_config);
+
+
+  /* Check so controller not busy before enabling ports */
+  crisv10_ready_wait();
+
+  /* Enable selected USB ports */
+  if(port_in_use(0)) {
+    *R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, no);
+  } else {
+    *R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, yes);
+  }
+  if(port_in_use(1)) {
+    *R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, no);
+  } else {
+    *R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, yes);
+  }
+
+  crisv10_ready_wait();
+  /* Start processing of USB traffic. */
+  *R_USB_COMMAND =
+    IO_STATE(R_USB_COMMAND, port_sel, nop) |
+    IO_STATE(R_USB_COMMAND, port_cmd, reset) |
+    IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run);
+
+  /* Do not continue probing initialization before USB interface is done */
+  crisv10_ready_wait();
+
+  /* Register our Host Controller to USB Core
+   * Finish the remaining parts of generic HCD initialization: allocate the
+   * buffers of consistent memory, register the bus
+   * and call the driver's reset() and start() routines. */
+  retval = usb_add_hcd(hcd, ETRAX_USB_HC_IRQ, IRQF_DISABLED);
+  if (retval != 0) {
+    devdrv_err("Failed registering HCD driver\n");
+    goto out;
+  }
+
+  return 0;
+
+ out:
+  devdrv_hcd_remove(dev);
+  return retval;
+}
+
+
+/* cleanup after the host controller and driver */
+static int __init_or_module devdrv_hcd_remove(struct device *dev)
+{
+  struct crisv10_hcd *crisv10_hcd = dev_get_drvdata(dev);
+  struct usb_hcd *hcd;
+
+  if (!crisv10_hcd)
+    return 0;
+  hcd = crisv10_hcd_to_hcd(crisv10_hcd);
+
+
+  /* Stop USB Controller in Etrax 100LX */
+  crisv10_hcd_reset(hcd);
+
+  usb_remove_hcd(hcd);
+  devdrv_dbg("Removed HCD from USB Core\n");
+
+  /* Free USB Controller IRQ */
+  free_irq(ETRAX_USB_HC_IRQ, NULL);
+
+  /* Free resources */
+  tc_dma_destroy();
+  tc_destroy();
+
+
+  if(port_in_use(0)) {
+    cris_free_io_interface(if_usb_1);
+  }
+  if(port_in_use(1)) {
+    cris_free_io_interface(if_usb_2);
+  }
+
+  devdrv_dbg("Freed all claimed resources\n");
+
+  return 0;
+}
+
+
+#ifdef	CONFIG_PM
+
+static int devdrv_hcd_suspend(struct usb_hcd *hcd, u32 state, u32 level)
+{
+  return 0; /* no-op for now */
+}
+
+static int devdrv_hcd_resume(struct usb_hcd *hcd, u32 level)
+{
+  return 0; /* no-op for now */
+}
+
+#endif /* CONFIG_PM */
+
+
+
+/*************************************************************/
+/*************************************************************/
+/* Module block                                              */
+/*************************************************************/
+/*************************************************************/
+ 
+/* register driver */
+static int __init module_hcd_init(void) 
+{
+  
+  if (usb_disabled())
+    return -ENODEV;
+
+  /* Here we select enabled ports by following defines created from
+     menuconfig */
+#ifndef CONFIG_ETRAX_USB_HOST_PORT1
+  ports &= ~(1<<0);
+#endif
+#ifndef CONFIG_ETRAX_USB_HOST_PORT2
+  ports &= ~(1<<1);
+#endif
+
+  printk(KERN_INFO "%s version "VERSION" "COPYRIGHT"\n", product_desc);
+
+  devdrv_hc_platform_device =
+    platform_device_register_simple((char *) hc_name, 0, NULL, 0);
+
+  if (IS_ERR(devdrv_hc_platform_device))
+    return PTR_ERR(devdrv_hc_platform_device);
+  return driver_register(&devdrv_hc_device_driver);
+  /* 
+   * Note that we do not set the DMA mask for the device,
+   * i.e. we pretend that we will use PIO, since no specific
+   * allocation routines are needed for DMA buffers. This will
+   * cause the HCD buffer allocation routines to fall back to
+   * kmalloc().
+   */
+}
+
+/* unregister driver */
+static void __exit module_hcd_exit(void) 
+{	
+  driver_unregister(&devdrv_hc_device_driver);
+}
+
+
+/* Module hooks */
+module_init(module_hcd_init);
+module_exit(module_hcd_exit);
--- linux-2.6.19.2.orig/drivers/usb/host/hc_crisv10.h	2007-01-10 20:10:37.000000000 +0100
+++ linux-2.6.19.2.dev/drivers/usb/host/hc_crisv10.h	1970-01-01 01:00:00.000000000 +0100
@@ -1,289 +0,0 @@
-#ifndef __LINUX_ETRAX_USB_H
-#define __LINUX_ETRAX_USB_H
-
-#include <linux/types.h>
-#include <linux/list.h>
-
-typedef struct USB_IN_Desc {
-	volatile __u16 sw_len;
-	volatile __u16 command;
-	volatile unsigned long next;
-	volatile unsigned long buf;
-	volatile __u16 hw_len;
-	volatile __u16 status;
-} USB_IN_Desc_t;
-
-typedef struct USB_SB_Desc {
-	volatile __u16 sw_len;
-	volatile __u16 command;
-	volatile unsigned long next;
-	volatile unsigned long buf;
-	__u32 dummy;
-} USB_SB_Desc_t;
-
-typedef struct USB_EP_Desc {
-	volatile __u16 hw_len;
-	volatile __u16 command;
-	volatile unsigned long sub;
-	volatile unsigned long next;
-	__u32 dummy;
-} USB_EP_Desc_t;
-
-struct virt_root_hub {
-	int devnum;
-	void *urb;
-	void *int_addr;
-	int send;
-	int interval;
-	int numports;
-	struct timer_list rh_int_timer;
-	volatile __u16 wPortChange_1;
-	volatile __u16 wPortChange_2;
-	volatile __u16 prev_wPortStatus_1;
-	volatile __u16 prev_wPortStatus_2;
-};
-
-struct etrax_usb_intr_traffic {
-	int sleeping;
-	int error;
-	struct wait_queue *wq;
-};
-
-typedef struct etrax_usb_hc {
-	struct usb_bus *bus;
-	struct virt_root_hub rh;
-	struct etrax_usb_intr_traffic intr;
-} etrax_hc_t;
-
-typedef enum {
-	STARTED,
-	NOT_STARTED,
-	UNLINK,
-	TRANSFER_DONE,
-	WAITING_FOR_DESCR_INTR
-} etrax_usb_urb_state_t;
-
-
-
-typedef struct etrax_usb_urb_priv {
-	/* The first_sb field is used for freeing all SB descriptors belonging
-	   to an urb. The corresponding ep descriptor's sub pointer cannot be
-	   used for this since the DMA advances the sub pointer as it processes
-	   the sb list. */
-	USB_SB_Desc_t *first_sb;
-	/* The last_sb field referes to the last SB descriptor that belongs to
-	   this urb. This is important to know so we can free the SB descriptors
-	   that ranges between first_sb and last_sb. */
-	USB_SB_Desc_t *last_sb;
-
-	/* The rx_offset field is used in ctrl and bulk traffic to keep track
-	   of the offset in the urb's transfer_buffer where incoming data should be
-	   copied to. */
-	__u32 rx_offset;
-
-	/* Counter used in isochronous transfers to keep track of the
-	   number of packets received/transmitted.  */
-	__u32 isoc_packet_counter;
-
-	/* This field is used to pass information about the urb's current state between
-	   the various interrupt handlers (thus marked volatile). */
-	volatile etrax_usb_urb_state_t urb_state;
-
-	/* Connection between the submitted urb and ETRAX epid number */
-	__u8 epid;
-
-	/* The rx_data_list field is used for periodic traffic, to hold
-	   received data for later processing in the the complete_urb functions,
-	   where the data us copied to the urb's transfer_buffer. Basically, we
-	   use this intermediate storage because we don't know when it's safe to
-	   reuse the transfer_buffer (FIXME?). */
-	struct list_head rx_data_list;
-} etrax_urb_priv_t;
-
-/* This struct is for passing data from the top half to the bottom half. */
-typedef struct usb_interrupt_registers
-{
-	etrax_hc_t *hc;
-	__u32 r_usb_epid_attn;
-	__u8 r_usb_status;
-	__u16 r_usb_rh_port_status_1;
-	__u16 r_usb_rh_port_status_2;
-	__u32 r_usb_irq_mask_read;
-	__u32 r_usb_fm_number;
-	struct work_struct usb_bh;
-} usb_interrupt_registers_t;
-
-/* This struct is for passing data from the isoc top half to the isoc bottom half. */
-typedef struct usb_isoc_complete_data
-{
-	struct urb *urb;
-	struct work_struct usb_bh;
-} usb_isoc_complete_data_t;
-
-/* This struct holds data we get from the rx descriptors for DMA channel 9
-   for periodic traffic (intr and isoc). */
-typedef struct rx_data
-{
-	void *data;
-	int length;
-	struct list_head list;
-} rx_data_t;
-
-typedef struct urb_entry
-{
-	struct urb *urb;
-	struct list_head list;
-} urb_entry_t;
-
-/* ---------------------------------------------------------------------------
-   Virtual Root HUB
-   ------------------------------------------------------------------------- */
-/* destination of request */
-#define RH_INTERFACE               0x01
-#define RH_ENDPOINT                0x02
-#define RH_OTHER                   0x03
-
-#define RH_CLASS                   0x20
-#define RH_VENDOR                  0x40
-
-/* Requests: bRequest << 8 | bmRequestType */
-#define RH_GET_STATUS           0x0080
-#define RH_CLEAR_FEATURE        0x0100
-#define RH_SET_FEATURE          0x0300
-#define RH_SET_ADDRESS		0x0500
-#define RH_GET_DESCRIPTOR	0x0680
-#define RH_SET_DESCRIPTOR       0x0700
-#define RH_GET_CONFIGURATION	0x0880
-#define RH_SET_CONFIGURATION	0x0900
-#define RH_GET_STATE            0x0280
-#define RH_GET_INTERFACE        0x0A80
-#define RH_SET_INTERFACE        0x0B00
-#define RH_SYNC_FRAME           0x0C80
-/* Our Vendor Specific Request */
-#define RH_SET_EP               0x2000
-
-
-/* Hub port features */
-#define RH_PORT_CONNECTION         0x00
-#define RH_PORT_ENABLE             0x01
-#define RH_PORT_SUSPEND            0x02
-#define RH_PORT_OVER_CURRENT       0x03
-#define RH_PORT_RESET              0x04
-#define RH_PORT_POWER              0x08
-#define RH_PORT_LOW_SPEED          0x09
-#define RH_C_PORT_CONNECTION       0x10
-#define RH_C_PORT_ENABLE           0x11
-#define RH_C_PORT_SUSPEND          0x12
-#define RH_C_PORT_OVER_CURRENT     0x13
-#define RH_C_PORT_RESET            0x14
-
-/* Hub features */
-#define RH_C_HUB_LOCAL_POWER       0x00
-#define RH_C_HUB_OVER_CURRENT      0x01
-
-#define RH_DEVICE_REMOTE_WAKEUP    0x00
-#define RH_ENDPOINT_STALL          0x01
-
-/* Our Vendor Specific feature */
-#define RH_REMOVE_EP               0x00
-
-
-#define RH_ACK                     0x01
-#define RH_REQ_ERR                 -1
-#define RH_NACK                    0x00
-
-/* Field definitions for */
-
-#define USB_IN_command__eol__BITNR      0 /* command macros */
-#define USB_IN_command__eol__WIDTH      1
-#define USB_IN_command__eol__no         0
-#define USB_IN_command__eol__yes        1
-
-#define USB_IN_command__intr__BITNR     3
-#define USB_IN_command__intr__WIDTH     1
-#define USB_IN_command__intr__no        0
-#define USB_IN_command__intr__yes       1
-
-#define USB_IN_status__eop__BITNR       1 /* status macros. */
-#define USB_IN_status__eop__WIDTH       1
-#define USB_IN_status__eop__no          0
-#define USB_IN_status__eop__yes         1
-
-#define USB_IN_status__eot__BITNR       5
-#define USB_IN_status__eot__WIDTH       1
-#define USB_IN_status__eot__no          0
-#define USB_IN_status__eot__yes         1
-
-#define USB_IN_status__error__BITNR     6
-#define USB_IN_status__error__WIDTH     1
-#define USB_IN_status__error__no        0
-#define USB_IN_status__error__yes       1
-
-#define USB_IN_status__nodata__BITNR    7
-#define USB_IN_status__nodata__WIDTH    1
-#define USB_IN_status__nodata__no       0
-#define USB_IN_status__nodata__yes      1
-
-#define USB_IN_status__epid__BITNR      8
-#define USB_IN_status__epid__WIDTH      5
-
-#define USB_EP_command__eol__BITNR      0
-#define USB_EP_command__eol__WIDTH      1
-#define USB_EP_command__eol__no         0
-#define USB_EP_command__eol__yes        1
-
-#define USB_EP_command__eof__BITNR      1
-#define USB_EP_command__eof__WIDTH      1
-#define USB_EP_command__eof__no         0
-#define USB_EP_command__eof__yes        1
-
-#define USB_EP_command__intr__BITNR     3
-#define USB_EP_command__intr__WIDTH     1
-#define USB_EP_command__intr__no        0
-#define USB_EP_command__intr__yes       1
-
-#define USB_EP_command__enable__BITNR   4
-#define USB_EP_command__enable__WIDTH   1
-#define USB_EP_command__enable__no      0
-#define USB_EP_command__enable__yes     1
-
-#define USB_EP_command__hw_valid__BITNR 5
-#define USB_EP_command__hw_valid__WIDTH 1
-#define USB_EP_command__hw_valid__no    0
-#define USB_EP_command__hw_valid__yes   1
-
-#define USB_EP_command__epid__BITNR     8
-#define USB_EP_command__epid__WIDTH     5
-
-#define USB_SB_command__eol__BITNR      0 /* command macros. */
-#define USB_SB_command__eol__WIDTH      1
-#define USB_SB_command__eol__no         0
-#define USB_SB_command__eol__yes        1
-
-#define USB_SB_command__eot__BITNR      1
-#define USB_SB_command__eot__WIDTH      1
-#define USB_SB_command__eot__no         0
-#define USB_SB_command__eot__yes        1
-
-#define USB_SB_command__intr__BITNR     3
-#define USB_SB_command__intr__WIDTH     1
-#define USB_SB_command__intr__no        0
-#define USB_SB_command__intr__yes       1
-
-#define USB_SB_command__tt__BITNR       4
-#define USB_SB_command__tt__WIDTH       2
-#define USB_SB_command__tt__zout        0
-#define USB_SB_command__tt__in          1
-#define USB_SB_command__tt__out         2
-#define USB_SB_command__tt__setup       3
-
-
-#define USB_SB_command__rem__BITNR      8
-#define USB_SB_command__rem__WIDTH      6
-
-#define USB_SB_command__full__BITNR     6
-#define USB_SB_command__full__WIDTH     1
-#define USB_SB_command__full__no        0
-#define USB_SB_command__full__yes       1
-
-#endif
--- linux-2.6.19.2.orig/drivers/usb/host/hc-crisv10.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.19.2.dev/drivers/usb/host/hc-crisv10.h	2006-01-27 13:59:58.000000000 +0100
@@ -0,0 +1,330 @@
+#ifndef __LINUX_ETRAX_USB_H
+#define __LINUX_ETRAX_USB_H
+
+#include <linux/types.h>
+#include <linux/list.h>
+
+struct USB_IN_Desc {
+  volatile __u16 sw_len;
+  volatile __u16 command;
+  volatile unsigned long next;
+  volatile unsigned long buf;
+  volatile __u16 hw_len;
+  volatile __u16 status;
+};
+
+struct USB_SB_Desc {
+  volatile __u16 sw_len;
+  volatile __u16 command;
+  volatile unsigned long next;
+  volatile unsigned long buf;
+};
+
+struct USB_EP_Desc {
+  volatile __u16 hw_len;
+  volatile __u16 command;
+  volatile unsigned long sub;
+  volatile unsigned long next;
+};
+
+
+/* Root Hub port status struct */
+struct crisv10_rh {
+  volatile __u16 wPortChange[2];
+  volatile __u16 wPortStatusPrev[2];
+};
+
+/* HCD description */
+struct crisv10_hcd {
+  spinlock_t		lock;
+  __u8			num_ports;
+  __u8                  running;
+};
+
+
+/* Endpoint HC private data description */
+struct crisv10_ep_priv {
+  int epid;
+};
+
+/* Additional software state info for a USB Controller epid */
+struct etrax_epid {
+  __u8 inuse;       /* !0 = setup in Etrax and used for a endpoint */
+  __u8 disabled;    /* !0 = Temporarly disabled to avoid resubmission */
+  __u8 type;        /* Setup as: PIPE_BULK, PIPE_CONTROL ... */
+  __u8 out_traffic; /* !0 = This epid is for out traffic */
+};
+
+/* Struct to hold information of scheduled later URB completion */
+struct urb_later_data {
+  struct work_struct ws;
+  struct usb_hcd *hcd;
+  struct urb *urb;
+  int urb_num;
+  int status;
+};
+
+
+typedef enum {
+  STARTED,
+  NOT_STARTED,
+  UNLINK,
+} crisv10_urb_state_t;
+
+
+struct crisv10_urb_priv {
+  /* Sequence number for this URB. Every new submited URB gets this from
+     a incrementing counter. Used when a URB is scheduled for later finish to
+     be sure that the intended URB hasn't already been completed (device
+     drivers has a tendency to reuse URBs once they are completed, causing us
+     to not be able to single old ones out only based on the URB pointer.) */
+  __u32 urb_num;
+
+  /* The first_sb field is used for freeing all SB descriptors belonging
+     to an urb. The corresponding ep descriptor's sub pointer cannot be
+     used for this since the DMA advances the sub pointer as it processes
+     the sb list. */
+  struct USB_SB_Desc *first_sb;
+
+  /* The last_sb field referes to the last SB descriptor that belongs to
+     this urb. This is important to know so we can free the SB descriptors
+     that ranges between first_sb and last_sb. */
+  struct USB_SB_Desc *last_sb;
+  
+  /* The rx_offset field is used in ctrl and bulk traffic to keep track
+     of the offset in the urb's transfer_buffer where incoming data should be
+     copied to. */
+  __u32 rx_offset;
+  
+  /* Counter used in isochronous transfers to keep track of the
+     number of packets received/transmitted.  */
+  __u32 isoc_packet_counter;
+
+  /* Flag that marks if this Isoc Out URB has finished it's transfer. Used
+     because several URBs can be finished before list is processed */
+  __u8  isoc_out_done;
+  
+  /* This field is used to pass information about the urb's current state
+     between the various interrupt handlers (thus marked volatile). */
+  volatile crisv10_urb_state_t urb_state;
+  
+  /* In Ctrl transfers consist of (at least) 3 packets: SETUP, IN and ZOUT.
+     When DMA8 sub-channel 2 has processed the SB list for this sequence we
+     get a interrupt. We also get a interrupt for In transfers and which
+     one of these interrupts that comes first depends of data size and device.
+     To be sure that we have got both interrupts before we complete the URB
+     we have these to flags that shows which part that has completed.
+     We can then check when we get one of the interrupts that if the other has
+     occured it's safe for us to complete the URB, otherwise we set appropriate
+     flag and do the completion when we get the other interrupt. */
+  volatile unsigned char ctrl_zout_done;
+  volatile unsigned char ctrl_rx_done;
+
+  /* Connection between the submitted urb and ETRAX epid number */
+  __u8 epid;
+  
+  /* The rx_data_list field is used for periodic traffic, to hold
+     received data for later processing in the the complete_urb functions,
+     where the data us copied to the urb's transfer_buffer. Basically, we
+     use this intermediate storage because we don't know when it's safe to
+     reuse the transfer_buffer (FIXME?). */
+  struct list_head rx_data_list;
+
+
+  /* The interval time rounded up to closest 2^N */
+  int interval;
+
+  /* Pool of EP descriptors needed if it's a INTR transfer.
+     Amount of EPs in pool correspons to how many INTR that should
+     be inserted in TxIntrEPList (max 128, defined by MAX_INTR_INTERVAL) */
+  struct USB_EP_Desc* intr_ep_pool[128];
+
+  /* The mount of EPs allocated for this INTR URB */
+  int intr_ep_pool_length;
+
+  /* Pointer to info struct if URB is scheduled to be finished later */
+  struct urb_later_data* later_data;
+};
+
+
+/* This struct is for passing data from the top half to the bottom half irq
+   handlers */
+struct crisv10_irq_reg {
+  struct usb_hcd* hcd;
+  __u32 r_usb_epid_attn;
+  __u8 r_usb_status;
+  __u16 r_usb_rh_port_status_1;
+  __u16 r_usb_rh_port_status_2;
+  __u32 r_usb_irq_mask_read;
+  __u32 r_usb_fm_number;
+  struct work_struct usb_bh;
+};
+
+
+/* This struct is for passing data from the isoc top half to the isoc bottom
+   half. */
+struct crisv10_isoc_complete_data {
+  struct usb_hcd *hcd;
+  struct urb *urb;
+  struct work_struct usb_bh;
+};
+
+/* Entry item for URB lists for each endpint */
+typedef struct urb_entry
+{
+	struct urb *urb;
+	struct list_head list;
+} urb_entry_t;
+
+/* ---------------------------------------------------------------------------
+   Virtual Root HUB
+   ------------------------------------------------------------------------- */
+/* destination of request */
+#define RH_INTERFACE               0x01
+#define RH_ENDPOINT                0x02
+#define RH_OTHER                   0x03
+
+#define RH_CLASS                   0x20
+#define RH_VENDOR                  0x40
+
+/* Requests: bRequest << 8 | bmRequestType */
+#define RH_GET_STATUS           0x0080
+#define RH_CLEAR_FEATURE        0x0100
+#define RH_SET_FEATURE          0x0300
+#define RH_SET_ADDRESS		0x0500
+#define RH_GET_DESCRIPTOR	0x0680
+#define RH_SET_DESCRIPTOR       0x0700
+#define RH_GET_CONFIGURATION	0x0880
+#define RH_SET_CONFIGURATION	0x0900
+#define RH_GET_STATE            0x0280
+#define RH_GET_INTERFACE        0x0A80
+#define RH_SET_INTERFACE        0x0B00
+#define RH_SYNC_FRAME           0x0C80
+/* Our Vendor Specific Request */
+#define RH_SET_EP               0x2000
+
+
+/* Hub port features */
+#define RH_PORT_CONNECTION         0x00
+#define RH_PORT_ENABLE             0x01
+#define RH_PORT_SUSPEND            0x02
+#define RH_PORT_OVER_CURRENT       0x03
+#define RH_PORT_RESET              0x04
+#define RH_PORT_POWER              0x08
+#define RH_PORT_LOW_SPEED          0x09
+#define RH_C_PORT_CONNECTION       0x10
+#define RH_C_PORT_ENABLE           0x11
+#define RH_C_PORT_SUSPEND          0x12
+#define RH_C_PORT_OVER_CURRENT     0x13
+#define RH_C_PORT_RESET            0x14
+
+/* Hub features */
+#define RH_C_HUB_LOCAL_POWER       0x00
+#define RH_C_HUB_OVER_CURRENT      0x01
+
+#define RH_DEVICE_REMOTE_WAKEUP    0x00
+#define RH_ENDPOINT_STALL          0x01
+
+/* Our Vendor Specific feature */
+#define RH_REMOVE_EP               0x00
+
+
+#define RH_ACK                     0x01
+#define RH_REQ_ERR                 -1
+#define RH_NACK                    0x00
+
+/* Field definitions for */
+
+#define USB_IN_command__eol__BITNR      0 /* command macros */
+#define USB_IN_command__eol__WIDTH      1
+#define USB_IN_command__eol__no         0
+#define USB_IN_command__eol__yes        1
+
+#define USB_IN_command__intr__BITNR     3
+#define USB_IN_command__intr__WIDTH     1
+#define USB_IN_command__intr__no        0
+#define USB_IN_command__intr__yes       1
+
+#define USB_IN_status__eop__BITNR       1 /* status macros. */
+#define USB_IN_status__eop__WIDTH       1
+#define USB_IN_status__eop__no          0
+#define USB_IN_status__eop__yes         1
+
+#define USB_IN_status__eot__BITNR       5
+#define USB_IN_status__eot__WIDTH       1
+#define USB_IN_status__eot__no          0
+#define USB_IN_status__eot__yes         1
+
+#define USB_IN_status__error__BITNR     6
+#define USB_IN_status__error__WIDTH     1
+#define USB_IN_status__error__no        0
+#define USB_IN_status__error__yes       1
+
+#define USB_IN_status__nodata__BITNR    7
+#define USB_IN_status__nodata__WIDTH    1
+#define USB_IN_status__nodata__no       0
+#define USB_IN_status__nodata__yes      1
+
+#define USB_IN_status__epid__BITNR      8
+#define USB_IN_status__epid__WIDTH      5
+
+#define USB_EP_command__eol__BITNR      0
+#define USB_EP_command__eol__WIDTH      1
+#define USB_EP_command__eol__no         0
+#define USB_EP_command__eol__yes        1
+
+#define USB_EP_command__eof__BITNR      1
+#define USB_EP_command__eof__WIDTH      1
+#define USB_EP_command__eof__no         0
+#define USB_EP_command__eof__yes        1
+
+#define USB_EP_command__intr__BITNR     3
+#define USB_EP_command__intr__WIDTH     1
+#define USB_EP_command__intr__no        0
+#define USB_EP_command__intr__yes       1
+
+#define USB_EP_command__enable__BITNR   4
+#define USB_EP_command__enable__WIDTH   1
+#define USB_EP_command__enable__no      0
+#define USB_EP_command__enable__yes     1
+
+#define USB_EP_command__hw_valid__BITNR 5
+#define USB_EP_command__hw_valid__WIDTH 1
+#define USB_EP_command__hw_valid__no    0
+#define USB_EP_command__hw_valid__yes   1
+
+#define USB_EP_command__epid__BITNR     8
+#define USB_EP_command__epid__WIDTH     5
+
+#define USB_SB_command__eol__BITNR      0 /* command macros. */
+#define USB_SB_command__eol__WIDTH      1
+#define USB_SB_command__eol__no         0
+#define USB_SB_command__eol__yes        1
+
+#define USB_SB_command__eot__BITNR      1
+#define USB_SB_command__eot__WIDTH      1
+#define USB_SB_command__eot__no         0
+#define USB_SB_command__eot__yes        1
+
+#define USB_SB_command__intr__BITNR     3
+#define USB_SB_command__intr__WIDTH     1
+#define USB_SB_command__intr__no        0
+#define USB_SB_command__intr__yes       1
+
+#define USB_SB_command__tt__BITNR       4
+#define USB_SB_command__tt__WIDTH       2
+#define USB_SB_command__tt__zout        0
+#define USB_SB_command__tt__in          1
+#define USB_SB_command__tt__out         2
+#define USB_SB_command__tt__setup       3
+
+
+#define USB_SB_command__rem__BITNR      8
+#define USB_SB_command__rem__WIDTH      6
+
+#define USB_SB_command__full__BITNR     6
+#define USB_SB_command__full__WIDTH     1
+#define USB_SB_command__full__no        0
+#define USB_SB_command__full__yes       1
+
+#endif
diff -urN linux-2.6.19.2.orig/drivers/net/cris/Makefile linux-2.6.19.2.dev/drivers/net/cris/Makefile
--- linux-2.6.19.2.orig/drivers/net/cris/Makefile	2007-01-10 20:10:37.000000000 +0100
+++ linux-2.6.19.2.dev/drivers/net/cris/Makefile	2005-01-04 13:09:12.000000000 +0100
@@ -1 +1,2 @@
 obj-$(CONFIG_ETRAX_ARCH_V10) += eth_v10.o
+obj-$(CONFIG_ETRAX_ARCH_V32) += eth_v32.o
diff -urN linux-2.6.19.2.orig/drivers/net/cris/eth_v10.c linux-2.6.19.2.dev/drivers/net/cris/eth_v10.c
--- linux-2.6.19.2.orig/drivers/net/cris/eth_v10.c	2007-01-10 20:10:37.000000000 +0100
+++ linux-2.6.19.2.dev/drivers/net/cris/eth_v10.c	2007-01-15 16:35:48.000000000 +0100
@@ -1,221 +1,10 @@
-/* $Id: ethernet.c,v 1.31 2004/10/18 14:49:03 starvik Exp $
- *
- * e100net.c: A network driver for the ETRAX 100LX network controller.
+/*
+ * Driver for the ETRAX 100LX network controller.
  *
- * Copyright (c) 1998-2002 Axis Communications AB.
+ * Copyright (c) 1998-2006 Axis Communications AB.
  *
  * The outline of this driver comes from skeleton.c.
  *
- * $Log: ethernet.c,v $
- * Revision 1.31  2004/10/18 14:49:03  starvik
- * Use RX interrupt as random source
- *
- * Revision 1.30  2004/09/29 10:44:04  starvik
- * Enabed MAC-address output again
- *
- * Revision 1.29  2004/08/24 07:14:05  starvik
- * Make use of generic MDIO interface and constants.
- *
- * Revision 1.28  2004/08/20 09:37:11  starvik
- * Added support for Intel LXT972A. Creds to Randy Scarborough.
- *
- * Revision 1.27  2004/08/16 12:37:22  starvik
- * Merge of Linux 2.6.8
- *
- * Revision 1.25  2004/06/21 10:29:57  starvik
- * Merge of Linux 2.6.7
- *
- * Revision 1.23  2004/06/09 05:29:22  starvik
- * Avoid any race where R_DMA_CH1_FIRST is NULL (may trigger cache bug).
- *
- * Revision 1.22  2004/05/14 07:58:03  starvik
- * Merge of changes from 2.4
- *
- * Revision 1.20  2004/03/11 11:38:40  starvik
- * Merge of Linux 2.6.4
- *
- * Revision 1.18  2003/12/03 13:45:46  starvik
- * Use hardware pad for short packets to prevent information leakage.
- *
- * Revision 1.17  2003/07/04 08:27:37  starvik
- * Merge of Linux 2.5.74
- *
- * Revision 1.16  2003/04/24 08:28:22  starvik
- * New LED behaviour: LED off when no link
- *
- * Revision 1.15  2003/04/09 05:20:47  starvik
- * Merge of Linux 2.5.67
- *
- * Revision 1.13  2003/03/06 16:11:01  henriken
- * Off by one error in group address register setting.
- *
- * Revision 1.12  2003/02/27 17:24:19  starvik
- * Corrected Rev to Revision
- *
- * Revision 1.11  2003/01/24 09:53:21  starvik
- * Oops. Initialize GA to 0, not to 1
- *
- * Revision 1.10  2003/01/24 09:50:55  starvik
- * Initialize GA_0 and GA_1 to 0 to avoid matching of unwanted packets
- *
- * Revision 1.9  2002/12/13 07:40:58  starvik
- * Added basic ethtool interface
- * Handled out of memory when allocating new buffers
- *
- * Revision 1.8  2002/12/11 13:13:57  starvik
- * Added arch/ to v10 specific includes
- * Added fix from Linux 2.4 in serial.c (flush_to_flip_buffer)
- *
- * Revision 1.7  2002/11/26 09:41:42  starvik
- * Added e100_set_config (standard interface to set media type)
- * Added protection against preemptive scheduling
- * Added standard MII ioctls
- *
- * Revision 1.6  2002/11/21 07:18:18  starvik
- * Timers must be initialized in 2.5.48
- *
- * Revision 1.5  2002/11/20 11:56:11  starvik
- * Merge of Linux 2.5.48
- *
- * Revision 1.4  2002/11/18 07:26:46  starvik
- * Linux 2.5 port of latest Linux 2.4 ethernet driver
- *
- * Revision 1.33  2002/10/02 20:16:17  hp
- * SETF, SETS: Use underscored IO_x_ macros rather than incorrect token concatenation
- *
- * Revision 1.32  2002/09/16 06:05:58  starvik
- * Align memory returned by dev_alloc_skb
- * Moved handling of sent packets to interrupt to avoid reference counting problem
- *
- * Revision 1.31  2002/09/10 13:28:23  larsv
- * Return -EINVAL for unknown ioctls to avoid confusing tools that tests
- * for supported functionality by issuing special ioctls, i.e. wireless
- * extensions.
- *
- * Revision 1.30  2002/05/07 18:50:08  johana
- * Correct spelling in comments.
- *
- * Revision 1.29  2002/05/06 05:38:49  starvik
- * Performance improvements:
- *    Large packets are not copied (breakpoint set to 256 bytes)
- *    The cache bug workaround is delayed until half of the receive list
- *      has been used
- *    Added transmit list
- *    Transmit interrupts are only enabled when transmit queue is full
- *
- * Revision 1.28.2.1  2002/04/30 08:15:51  starvik
- * Performance improvements:
- *   Large packets are not copied (breakpoint set to 256 bytes)
- *   The cache bug workaround is delayed until half of the receive list
- *     has been used.
- *   Added transmit list
- *   Transmit interrupts are only enabled when transmit queue is full
- *
- * Revision 1.28  2002/04/22 11:47:21  johana
- * Fix according to 2.4.19-pre7. time_after/time_before and
- * missing end of comment.
- * The patch has a typo for ethernet.c in e100_clear_network_leds(),
- *  that is fixed here.
- *
- * Revision 1.27  2002/04/12 11:55:11  bjornw
- * Added TODO
- *
- * Revision 1.26  2002/03/15 17:11:02  bjornw
- * Use prepare_rx_descriptor after the CPU has touched the receiving descs
- *
- * Revision 1.25  2002/03/08 13:07:53  bjornw
- * Unnecessary spinlock removed
- *
- * Revision 1.24  2002/02/20 12:57:43  fredriks
- * Replaced MIN() with min().
- *
- * Revision 1.23  2002/02/20 10:58:14  fredriks
- * Strip the Ethernet checksum (4 bytes) before forwarding a frame to upper layers.
- *
- * Revision 1.22  2002/01/30 07:48:22  matsfg
- * Initiate R_NETWORK_TR_CTRL
- *
- * Revision 1.21  2001/11/23 11:54:49  starvik
- * Added IFF_PROMISC and IFF_ALLMULTI handling in set_multicast_list
- * Removed compiler warnings
- *
- * Revision 1.20  2001/11/12 19:26:00  pkj
- * * Corrected e100_negotiate() to not assign half to current_duplex when
- *   it was supposed to compare them...
- * * Cleaned up failure handling in e100_open().
- * * Fixed compiler warnings.
- *
- * Revision 1.19  2001/11/09 07:43:09  starvik
- * Added full duplex support
- * Added ioctl to set speed and duplex
- * Clear LED timer only runs when LED is lit
- *
- * Revision 1.18  2001/10/03 14:40:43  jonashg
- * Update rx_bytes counter.
- *
- * Revision 1.17  2001/06/11 12:43:46  olof
- * Modified defines for network LED behavior
- *
- * Revision 1.16  2001/05/30 06:12:46  markusl
- * TxDesc.next should not be set to NULL
- *
- * Revision 1.15  2001/05/29 10:27:04  markusl
- * Updated after review remarks:
- * +Use IO_EXTRACT
- * +Handle underrun
- *
- * Revision 1.14  2001/05/29 09:20:14  jonashg
- * Use driver name on printk output so one can tell which driver that complains.
- *
- * Revision 1.13  2001/05/09 12:35:59  johana
- * Use DMA_NBR and IRQ_NBR defines from dma.h and irq.h
- *
- * Revision 1.12  2001/04/05 11:43:11  tobiasa
- * Check dev before panic.
- *
- * Revision 1.11  2001/04/04 11:21:05  markusl
- * Updated according to review remarks
- *
- * Revision 1.10  2001/03/26 16:03:06  bjornw
- * Needs linux/config.h
- *
- * Revision 1.9  2001/03/19 14:47:48  pkj
- * * Make sure there is always a pause after the network LEDs are
- *   changed so they will not look constantly lit during heavy traffic.
- * * Always use HZ when setting times relative to jiffies.
- * * Use LED_NETWORK_SET() when setting the network LEDs.
- *
- * Revision 1.8  2001/02/27 13:52:48  bjornw
- * malloc.h -> slab.h
- *
- * Revision 1.7  2001/02/23 13:46:38  bjornw
- * Spellling check
- *
- * Revision 1.6  2001/01/26 15:21:04  starvik
- * Don't disable interrupts while reading MDIO registers (MDIO is slow)
- * Corrected promiscuous mode
- * Improved deallocation of IRQs ("ifconfig eth0 down" now works)
- *
- * Revision 1.5  2000/11/29 17:22:22  bjornw
- * Get rid of the udword types legacy stuff
- *
- * Revision 1.4  2000/11/22 16:36:09  bjornw
- * Please marketing by using the correct case when spelling Etrax.
- *
- * Revision 1.3  2000/11/21 16:43:04  bjornw
- * Minor short->int change
- *
- * Revision 1.2  2000/11/08 14:27:57  bjornw
- * 2.4 port
- *
- * Revision 1.1  2000/11/06 13:56:00  bjornw
- * Verbatim copy of the 1.24 version of e100net.c from elinux
- *
- * Revision 1.24  2000/10/04 15:55:23  bjornw
- * * Use virt_to_phys etc. for DMA addresses
- * * Removed bogus CHECKSUM_UNNECESSARY
- *
- *
  */
 
 
@@ -251,6 +40,7 @@
 #include <asm/bitops.h>
 #include <asm/ethernet.h>
 #include <asm/cache.h>
+#include <asm/arch/io_interface_mux.h>
 
 //#define ETHDEBUG
 #define D(x)
@@ -280,6 +70,9 @@
 	 * by this lock as well.
 	 */
 	spinlock_t lock;
+
+	spinlock_t led_lock; /* Protect LED state */
+	spinlock_t transceiver_lock; /* Protect transceiver state. */
 };
 
 typedef struct etrax_eth_descr
@@ -296,8 +89,6 @@
 	void (*check_duplex)(struct net_device* dev);
 };
 
-struct transceiver_ops* transceiver;
-
 /* Duplex settings */
 enum duplex
 {
@@ -308,7 +99,7 @@
 
 /* Dma descriptors etc. */
 
-#define MAX_MEDIA_DATA_SIZE 1518
+#define MAX_MEDIA_DATA_SIZE 1522
 
 #define MIN_PACKET_LEN      46
 #define ETHER_HEAD_LEN      14
@@ -332,9 +123,9 @@
 #define MDIO_TDK_DIAGNOSTIC_DPLX          0x800
 
 /*Intel LXT972A specific*/
-#define MDIO_INT_STATUS_REG_2			0x0011
-#define MDIO_INT_FULL_DUPLEX_IND		( 1 << 9 )
-#define MDIO_INT_SPEED				( 1 << 14 )
+#define MDIO_INT_STATUS_REG_2            0x0011
+#define MDIO_INT_FULL_DUPLEX_IND       (1 << 9)
+#define MDIO_INT_SPEED                (1 << 14)
 
 /* Network flash constants */
 #define NET_FLASH_TIME                  (HZ/50) /* 20 ms */
@@ -345,8 +136,8 @@
 #define NO_NETWORK_ACTIVITY 0
 #define NETWORK_ACTIVITY    1
 
-#define NBR_OF_RX_DESC     64
-#define NBR_OF_TX_DESC     256
+#define NBR_OF_RX_DESC     32
+#define NBR_OF_TX_DESC     16
 
 /* Large packets are sent directly to upper layers while small packets are */
 /* copied (to reduce memory waste). The following constant decides the breakpoint */
@@ -368,7 +159,6 @@
 static etrax_eth_descr *myNextRxDesc;  /* Points to the next descriptor to
                                           to be processed */
 static etrax_eth_descr *myLastRxDesc;  /* The last processed descriptor */
-static etrax_eth_descr *myPrevRxDesc;  /* The descriptor right before myNextRxDesc */
 
 static etrax_eth_descr RxDescList[NBR_OF_RX_DESC] __attribute__ ((aligned(32)));
 
@@ -378,7 +168,6 @@
 static etrax_eth_descr TxDescList[NBR_OF_TX_DESC] __attribute__ ((aligned(32)));
 
 static unsigned int network_rec_config_shadow = 0;
-static unsigned int mdio_phy_addr; /* Transciever address */
 
 static unsigned int network_tr_ctrl_shadow = 0;
 
@@ -412,7 +201,7 @@
 static void e100_tx_timeout(struct net_device *dev);
 static struct net_device_stats *e100_get_stats(struct net_device *dev);
 static void set_multicast_list(struct net_device *dev);
-static void e100_hardware_send_packet(char *buf, int length);
+static void e100_hardware_send_packet(struct net_local* np, char *buf, int length);
 static void update_rx_stats(struct net_device_stats *);
 static void update_tx_stats(struct net_device_stats *);
 static int e100_probe_transceiver(struct net_device* dev);
@@ -435,7 +224,10 @@
 static void e100_set_network_leds(int active);
 
 static const struct ethtool_ops e100_ethtool_ops;
-
+#if defined(CONFIG_ETRAX_NO_PHY)
+static void dummy_check_speed(struct net_device* dev);
+static void dummy_check_duplex(struct net_device* dev);
+#else
 static void broadcom_check_speed(struct net_device* dev);
 static void broadcom_check_duplex(struct net_device* dev);
 static void tdk_check_speed(struct net_device* dev);
@@ -444,16 +236,29 @@
 static void intel_check_duplex(struct net_device* dev);
 static void generic_check_speed(struct net_device* dev);
 static void generic_check_duplex(struct net_device* dev);
+#endif
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void e100_netpoll(struct net_device* dev);
+#endif
+
+static int autoneg_normal = 1;
 
 struct transceiver_ops transceivers[] =
 {
+#if defined(CONFIG_ETRAX_NO_PHY)
+	{0x0000, dummy_check_speed, dummy_check_duplex}        /* Dummy */
+#else
 	{0x1018, broadcom_check_speed, broadcom_check_duplex},  /* Broadcom */
 	{0xC039, tdk_check_speed, tdk_check_duplex},            /* TDK 2120 */
 	{0x039C, tdk_check_speed, tdk_check_duplex},            /* TDK 2120C */
-        {0x04de, intel_check_speed, intel_check_duplex},     	/* Intel LXT972A*/
+	{0x04de, intel_check_speed, intel_check_duplex},        /* Intel LXT972A*/
 	{0x0000, generic_check_speed, generic_check_duplex}     /* Generic, must be last */
+#endif
 };
 
+struct transceiver_ops* transceiver = &transceivers[0];
+static unsigned int mdio_phy_addr = 0; /* PHY address on MDIO bus */
+
 #define tx_done(dev) (*R_DMA_CH0_CMD == 0)
 
 /*
@@ -468,18 +273,26 @@
 etrax_ethernet_init(void)
 {
 	struct net_device *dev;
-        struct net_local* np;
+	struct net_local* np;
 	int i, err;
 
 	printk(KERN_INFO
-	       "ETRAX 100LX 10/100MBit ethernet v2.0 (c) 2000-2003 Axis Communications AB\n");
-
+	       "ETRAX 100LX 10/100MBit ethernet v2.0 (c) 1998-2006 Axis Communications AB\n");
+	
+	if (cris_request_io_interface(if_eth, cardname)) {
+		printk(KERN_CRIT "etrax_ethernet_init failed to get IO interface\n");
+		return -EBUSY;
+	}
+	
 	dev = alloc_etherdev(sizeof(struct net_local));
-	np = dev->priv;
-
 	if (!dev)
 		return -ENOMEM;
+	
+	np = netdev_priv(dev);
 
+	/* we do our own locking */
+	dev->features |= NETIF_F_LLTX;
+		
 	dev->base_addr = (unsigned int)R_NETWORK_SA_0; /* just to have something to show */
 
 	/* now setup our etrax specific stuff */
@@ -495,18 +308,26 @@
 	dev->get_stats          = e100_get_stats;
 	dev->set_multicast_list = set_multicast_list;
 	dev->set_mac_address    = e100_set_mac_address;
-	dev->ethtool_ops	= &e100_ethtool_ops;
+	dev->ethtool_ops        = &e100_ethtool_ops;
 	dev->do_ioctl           = e100_ioctl;
-	dev->set_config		= e100_set_config;
+	dev->set_config         = e100_set_config;
 	dev->tx_timeout         = e100_tx_timeout;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	dev->poll_controller = e100_netpoll;
+#endif
+
+	spin_lock_init(&np->lock);
+	spin_lock_init(&np->led_lock);
+	spin_lock_init(&np->transceiver_lock);
 
 	/* Initialise the list of Etrax DMA-descriptors */
 
 	/* Initialise receive descriptors */
 
 	for (i = 0; i < NBR_OF_RX_DESC; i++) {
-		/* Allocate two extra cachelines to make sure that buffer used by DMA
-		 * does not share cacheline with any other data (to avoid cache bug)
+		/* Allocate two extra cachelines to make sure that buffer used
+		 * by DMA does not share cacheline with any other data (to
+		 * avoid cache bug)
 		 */
 		RxDescList[i].skb = dev_alloc_skb(MAX_MEDIA_DATA_SIZE + 2 * L1_CACHE_BYTES);
 		if (!RxDescList[i].skb)
@@ -517,6 +338,7 @@
 		RxDescList[i].descr.buf    = L1_CACHE_ALIGN(virt_to_phys(RxDescList[i].skb->data));
 		RxDescList[i].descr.status = 0;
 		RxDescList[i].descr.hw_len = 0;
+
 		prepare_rx_descriptor(&RxDescList[i].descr);
 	}
 
@@ -542,7 +364,6 @@
 
 	myNextRxDesc  = &RxDescList[0];
 	myLastRxDesc  = &RxDescList[NBR_OF_RX_DESC - 1];
-	myPrevRxDesc  = &RxDescList[NBR_OF_RX_DESC - 1];
 	myFirstTxDesc = &TxDescList[0];
 	myNextTxDesc  = &TxDescList[0];
 	myLastTxDesc  = &TxDescList[NBR_OF_TX_DESC - 1];
@@ -563,18 +384,19 @@
 	current_speed = 10;
 	current_speed_selection = 0; /* Auto */
 	speed_timer.expires = jiffies + NET_LINK_UP_CHECK_INTERVAL;
-        duplex_timer.data = (unsigned long)dev;
+	speed_timer.data = (unsigned long)dev;
 	speed_timer.function = e100_check_speed;
 
 	clear_led_timer.function = e100_clear_network_leds;
+	clear_led_timer.data = (unsigned long)dev;
 
 	full_duplex = 0;
 	current_duplex = autoneg;
 	duplex_timer.expires = jiffies + NET_DUPLEX_CHECK_INTERVAL;
-        duplex_timer.data = (unsigned long)dev;
+	duplex_timer.data = (unsigned long)dev;
 	duplex_timer.function = e100_check_duplex;
 
-        /* Initialize mii interface */
+	/* Initialize mii interface */
 	np->mii_if.phy_id = mdio_phy_addr;
 	np->mii_if.phy_id_mask = 0x1f;
 	np->mii_if.reg_num_mask = 0x1f;
@@ -586,6 +408,9 @@
 	/* unwanted addresses are matched */
 	*R_NETWORK_GA_0 = 0x00000000;
 	*R_NETWORK_GA_1 = 0x00000000;
+
+	/* Initialize next time the led can flash */
+	led_next_time = jiffies;
 	return 0;
 }
 
@@ -596,7 +421,7 @@
 static int
 e100_set_mac_address(struct net_device *dev, void *p)
 {
-	struct net_local *np = (struct net_local *)dev->priv;
+	struct net_local *np = netdev_priv(dev);
 	struct sockaddr *addr = p;
 	int i;
 
@@ -680,17 +505,36 @@
 	/* allocate the irq corresponding to the transmitting DMA */
 
 	if (request_irq(NETWORK_DMA_TX_IRQ_NBR, e100rxtx_interrupt, 0,
-			cardname, (void *)dev)) {
+	                cardname, (void *)dev)) {
 		goto grace_exit1;
 	}
 
 	/* allocate the irq corresponding to the network errors etc */
 
 	if (request_irq(NETWORK_STATUS_IRQ_NBR, e100nw_interrupt, 0,
-			cardname, (void *)dev)) {
+	                cardname, (void *)dev)) {
 		goto grace_exit2;
 	}
 
+	/*
+	 * Always allocate the DMA channels after the IRQ,
+	 * and clean up on failure.
+	 */
+
+	if (cris_request_dma(NETWORK_TX_DMA_NBR,
+	                     cardname,
+	                     DMA_VERBOSE_ON_ERROR,
+	                     dma_eth)) {
+		goto grace_exit3;
+        }
+
+	if (cris_request_dma(NETWORK_RX_DMA_NBR,
+	                     cardname,
+	                     DMA_VERBOSE_ON_ERROR,
+	                     dma_eth)) {
+		goto grace_exit4;
+        }
+
 	/* give the HW an idea of what MAC address we want */
 
 	*R_NETWORK_SA_0 = dev->dev_addr[0] | (dev->dev_addr[1] << 8) |
@@ -705,6 +549,7 @@
 
 	*R_NETWORK_REC_CONFIG = 0xd; /* broadcast rec, individ. rec, ma0 enabled */
 #else
+	SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, max_size, size1522);
 	SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, broadcast, receive);
 	SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, ma0, enable);
 	SETF(network_rec_config_shadow, R_NETWORK_REC_CONFIG, duplex, full_duplex);
@@ -724,8 +569,7 @@
 	SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, crc, enable);
 	*R_NETWORK_TR_CTRL = network_tr_ctrl_shadow;
 
-	save_flags(flags);
-	cli();
+	local_irq_save(flags);
 
 	/* enable the irq's for ethernet DMA */
 
@@ -757,12 +601,13 @@
 
 	*R_DMA_CH0_FIRST = 0;
 	*R_DMA_CH0_DESCR = virt_to_phys(myLastTxDesc);
+	netif_start_queue(dev);
 
-	restore_flags(flags);
+	local_irq_restore(flags);
 
 	/* Probe for transceiver */
 	if (e100_probe_transceiver(dev))
-		goto grace_exit3;
+		goto grace_exit5;
 
 	/* Start duplex/speed timers */
 	add_timer(&speed_timer);
@@ -771,10 +616,14 @@
 	/* We are now ready to accept transmit requeusts from
 	 * the queueing layer of the networking.
 	 */
-	netif_start_queue(dev);
+	netif_carrier_on(dev);
 
 	return 0;
 
+grace_exit5:
+	cris_free_dma(NETWORK_RX_DMA_NBR, cardname);
+grace_exit4:
+	cris_free_dma(NETWORK_TX_DMA_NBR, cardname);
 grace_exit3:
 	free_irq(NETWORK_STATUS_IRQ_NBR, (void *)dev);
 grace_exit2:
@@ -785,7 +634,13 @@
 	return -EAGAIN;
 }
 
-
+#if defined(CONFIG_ETRAX_NO_PHY)
+static void
+dummy_check_speed(struct net_device* dev)
+{
+	current_speed = 100;
+}
+#else
 static void
 generic_check_speed(struct net_device* dev)
 {
@@ -821,15 +676,18 @@
 	data = e100_get_mdio_reg(dev, mdio_phy_addr, MDIO_INT_STATUS_REG_2);
 	current_speed = (data & MDIO_INT_SPEED ? 100 : 10);
 }
-
+#endif
 static void
 e100_check_speed(unsigned long priv)
 {
 	struct net_device* dev = (struct net_device*)priv;
+	struct net_local *np = netdev_priv(dev);
 	static int led_initiated = 0;
 	unsigned long data;
 	int old_speed = current_speed;
 
+	spin_lock(&np->transceiver_lock);
+
 	data = e100_get_mdio_reg(dev, mdio_phy_addr, MII_BMSR);
 	if (!(data & BMSR_LSTATUS)) {
 		current_speed = 0;
@@ -837,14 +695,22 @@
 		transceiver->check_speed(dev);
 	}
 
+	spin_lock(&np->led_lock);
 	if ((old_speed != current_speed) || !led_initiated) {
 		led_initiated = 1;
 		e100_set_network_leds(NO_NETWORK_ACTIVITY);
+		if (current_speed)
+			netif_carrier_on(dev);
+		else
+			netif_carrier_off(dev);
 	}
+	spin_unlock(&np->led_lock);
 
 	/* Reinitialize the timer. */
 	speed_timer.expires = jiffies + NET_LINK_UP_CHECK_INTERVAL;
 	add_timer(&speed_timer);
+
+	spin_unlock(&np->transceiver_lock);
 }
 
 static void
@@ -857,7 +723,7 @@
 	          ADVERTISE_10HALF | ADVERTISE_10FULL);
 
 	switch (current_speed_selection) {
-		case 10 :
+		case 10:
 			if (current_duplex == full)
 				data |= ADVERTISE_10FULL;
 			else if (current_duplex == half)
@@ -866,7 +732,7 @@
 				data |= ADVERTISE_10HALF | ADVERTISE_10FULL;
 			break;
 
-		case 100 :
+		case 100:
 			 if (current_duplex == full)
 				data |= ADVERTISE_100FULL;
 			else if (current_duplex == half)
@@ -875,45 +741,54 @@
 				data |= ADVERTISE_100HALF | ADVERTISE_100FULL;
 			break;
 
-		case 0 : /* Auto */
+		case 0: /* Auto */
 			 if (current_duplex == full)
 				data |= ADVERTISE_100FULL | ADVERTISE_10FULL;
 			else if (current_duplex == half)
 				data |= ADVERTISE_100HALF | ADVERTISE_10HALF;
 			else
 				data |= ADVERTISE_10HALF | ADVERTISE_10FULL |
-				  ADVERTISE_100HALF | ADVERTISE_100FULL;
+					ADVERTISE_100HALF | ADVERTISE_100FULL;
 			break;
 
-		default : /* assume autoneg speed and duplex */
+		default: /* assume autoneg speed and duplex */
 			data |= ADVERTISE_10HALF | ADVERTISE_10FULL |
-				  ADVERTISE_100HALF | ADVERTISE_100FULL;
+				ADVERTISE_100HALF | ADVERTISE_100FULL;
+			break;
 	}
 
 	e100_set_mdio_reg(dev, mdio_phy_addr, MII_ADVERTISE, data);
 
 	/* Renegotiate with link partner */
-	data = e100_get_mdio_reg(dev, mdio_phy_addr, MII_BMCR);
-	data |= BMCR_ANENABLE | BMCR_ANRESTART;
-
+	if (autoneg_normal) {
+	  data = e100_get_mdio_reg(dev, mdio_phy_addr, MII_BMCR);
+	  data |= BMCR_ANENABLE | BMCR_ANRESTART;
+	}
 	e100_set_mdio_reg(dev, mdio_phy_addr, MII_BMCR, data);
 }
 
 static void
 e100_set_speed(struct net_device* dev, unsigned long speed)
 {
+	struct net_local *np = netdev_priv(dev);
+
+	spin_lock(&np->transceiver_lock);
 	if (speed != current_speed_selection) {
 		current_speed_selection = speed;
 		e100_negotiate(dev);
 	}
+	spin_unlock(&np->transceiver_lock);
 }
 
 static void
 e100_check_duplex(unsigned long priv)
 {
 	struct net_device *dev = (struct net_device *)priv;
-	struct net_local *np = (struct net_local *)dev->priv;
-	int old_duplex = full_duplex;
+	struct net_local *np = netdev_priv(dev);
+	int old_duplex;
+
+	spin_lock(&np->transceiver_lock);
+	old_duplex = full_duplex;
 	transceiver->check_duplex(dev);
 	if (old_duplex != full_duplex) {
 		/* Duplex changed */
@@ -925,12 +800,20 @@
 	duplex_timer.expires = jiffies + NET_DUPLEX_CHECK_INTERVAL;
 	add_timer(&duplex_timer);
 	np->mii_if.full_duplex = full_duplex;
+	spin_unlock(&np->transceiver_lock);
 }
-
+#if defined(CONFIG_ETRAX_NO_PHY)
+static void
+dummy_check_duplex(struct net_device* dev)
+{
+	full_duplex = 1;
+}
+#else
 static void
 generic_check_duplex(struct net_device* dev)
 {
 	unsigned long data;
+
 	data = e100_get_mdio_reg(dev, mdio_phy_addr, MII_ADVERTISE);
 	if ((data & ADVERTISE_10FULL) ||
 	    (data & ADVERTISE_100FULL))
@@ -943,6 +826,7 @@
 tdk_check_duplex(struct net_device* dev)
 {
 	unsigned long data;
+
 	data = e100_get_mdio_reg(dev, mdio_phy_addr, MDIO_TDK_DIAGNOSTIC_REG);
 	full_duplex = (data & MDIO_TDK_DIAGNOSTIC_DPLX) ? 1 : 0;
 }
@@ -951,6 +835,7 @@
 broadcom_check_duplex(struct net_device* dev)
 {
 	unsigned long data;
+
 	data = e100_get_mdio_reg(dev, mdio_phy_addr, MDIO_AUX_CTRL_STATUS_REG);
 	full_duplex = (data & MDIO_BC_FULL_DUPLEX_IND) ? 1 : 0;
 }
@@ -959,26 +844,35 @@
 intel_check_duplex(struct net_device* dev)
 {
 	unsigned long data;
+
 	data = e100_get_mdio_reg(dev, mdio_phy_addr, MDIO_INT_STATUS_REG_2);
 	full_duplex = (data & MDIO_INT_FULL_DUPLEX_IND) ? 1 : 0;
 }
-
+#endif
 static void
 e100_set_duplex(struct net_device* dev, enum duplex new_duplex)
 {
+	struct net_local *np = netdev_priv(dev);
+
+	spin_lock(&np->transceiver_lock);
 	if (new_duplex != current_duplex) {
 		current_duplex = new_duplex;
 		e100_negotiate(dev);
 	}
+	spin_unlock(&np->transceiver_lock);
 }
 
 static int
 e100_probe_transceiver(struct net_device* dev)
 {
+#if !defined(CONFIG_ETRAX_NO_PHY)
 	unsigned int phyid_high;
 	unsigned int phyid_low;
 	unsigned int oui;
 	struct transceiver_ops* ops = NULL;
+	struct net_local *np = netdev_priv(dev);
+
+	spin_lock(&np->transceiver_lock);
 
 	/* Probe MDIO physical address */
 	for (mdio_phy_addr = 0; mdio_phy_addr <= 31; mdio_phy_addr++) {
@@ -986,7 +880,7 @@
 			break;
 	}
 	if (mdio_phy_addr == 32)
-		 return -ENODEV;
+		return -ENODEV;
 
 	/* Get manufacturer */
 	phyid_high = e100_get_mdio_reg(dev, mdio_phy_addr, MII_PHYSID1);
@@ -999,6 +893,8 @@
 	}
 	transceiver = ops;
 
+	spin_unlock(&np->transceiver_lock);
+#endif
 	return 0;
 }
 
@@ -1006,7 +902,7 @@
 e100_get_mdio_reg(struct net_device *dev, int phy_id, int location)
 {
 	unsigned short cmd;    /* Data to be sent on MDIO port */
-	int data;   /* Data read from MDIO */
+	int data;              /* Data read from MDIO */
 	int bitCounter;
 
 	/* Start of frame, OP Code, Physical Address, Register Address */
@@ -1082,6 +978,7 @@
 e100_receive_mdio_bit()
 {
 	unsigned char bit;
+
 	*R_NETWORK_MGM_CTRL = 0;
 	bit = IO_EXTRACT(R_NETWORK_STAT, mdio, *R_NETWORK_STAT);
 	udelay(1);
@@ -1117,7 +1014,7 @@
 static void
 e100_tx_timeout(struct net_device *dev)
 {
-	struct net_local *np = (struct net_local *)dev->priv;
+	struct net_local *np = netdev_priv(dev);
 	unsigned long flags;
 
 	spin_lock_irqsave(&np->lock, flags);
@@ -1139,8 +1036,7 @@
 	e100_reset_transceiver(dev);
 
 	/* and get rid of the packets that never got an interrupt */
-	while (myFirstTxDesc != myNextTxDesc)
-	{
+	while (myFirstTxDesc != myNextTxDesc) {
 		dev_kfree_skb(myFirstTxDesc->skb);
 		myFirstTxDesc->skb = 0;
 		myFirstTxDesc = phys_to_virt(myFirstTxDesc->descr.next);
@@ -1166,7 +1062,7 @@
 static int
 e100_send_packet(struct sk_buff *skb, struct net_device *dev)
 {
-	struct net_local *np = (struct net_local *)dev->priv;
+	struct net_local *np = netdev_priv(dev);
 	unsigned char *buf = skb->data;
 	unsigned long flags;
 
@@ -1179,7 +1075,7 @@
 
 	dev->trans_start = jiffies;
 
-	e100_hardware_send_packet(buf, skb->len);
+	e100_hardware_send_packet(np, buf, skb->len);
 
 	myNextTxDesc = phys_to_virt(myNextTxDesc->descr.next);
 
@@ -1202,13 +1098,15 @@
 e100rxtx_interrupt(int irq, void *dev_id)
 {
 	struct net_device *dev = (struct net_device *)dev_id;
-	struct net_local *np = (struct net_local *)dev->priv;
-	unsigned long irqbits = *R_IRQ_MASK2_RD;
+	struct net_local *np = netdev_priv(dev);
+	unsigned long irqbits;
 
-	/* Disable RX/TX IRQs to avoid reentrancy */
-	*R_IRQ_MASK2_CLR =
-	  IO_STATE(R_IRQ_MASK2_CLR, dma0_eop, clr) |
-	  IO_STATE(R_IRQ_MASK2_CLR, dma1_eop, clr);
+	/* 
+	 * Note that both rx and tx interrupts are blocked at this point, 
+	 * regardless of which got us here.
+	 */
+	
+	irqbits = *R_IRQ_MASK2_RD;
 
 	/* Handle received packets */
 	if (irqbits & IO_STATE(R_IRQ_MASK2_RD, dma1_eop, active)) {
@@ -1224,7 +1122,7 @@
 			 * allocate a new buffer to put a packet in.
 			 */
 			e100_rx(dev);
-			((struct net_local *)dev->priv)->stats.rx_packets++;
+			np->stats.rx_packets++;
 			/* restart/continue on the channel, for safety */
 			*R_DMA_CH1_CMD = IO_STATE(R_DMA_CH1_CMD, cmd, restart);
 			/* clear dma channel 1 eop/descr irq bits */
@@ -1239,8 +1137,7 @@
 
 	/* Report any packets that have been sent */
 	while (myFirstTxDesc != phys_to_virt(*R_DMA_CH0_FIRST) &&
-	       myFirstTxDesc != myNextTxDesc)
-	{
+	       (netif_queue_stopped(dev) || myFirstTxDesc != myNextTxDesc)) {
 		np->stats.tx_bytes += myFirstTxDesc->skb->len;
 		np->stats.tx_packets++;
 
@@ -1249,19 +1146,15 @@
 		dev_kfree_skb_irq(myFirstTxDesc->skb);
 		myFirstTxDesc->skb = 0;
 		myFirstTxDesc = phys_to_virt(myFirstTxDesc->descr.next);
+                /* Wake up queue. */
+		netif_wake_queue(dev);
 	}
 
 	if (irqbits & IO_STATE(R_IRQ_MASK2_RD, dma0_eop, active)) {
-		/* acknowledge the eop interrupt and wake up queue */
+		/* acknowledge the eop interrupt. */
 		*R_DMA_CH0_CLR_INTR = IO_STATE(R_DMA_CH0_CLR_INTR, clr_eop, do);
-		netif_wake_queue(dev);
 	}
 
-	/* Enable RX/TX IRQs again */
-	*R_IRQ_MASK2_SET =
-	  IO_STATE(R_IRQ_MASK2_SET, dma0_eop, set) |
-	  IO_STATE(R_IRQ_MASK2_SET, dma1_eop, set);
-
 	return IRQ_HANDLED;
 }
 
@@ -1269,7 +1162,7 @@
 e100nw_interrupt(int irq, void *dev_id)
 {
 	struct net_device *dev = (struct net_device *)dev_id;
-	struct net_local *np = (struct net_local *)dev->priv;
+	struct net_local *np = netdev_priv(dev);
 	unsigned long irqbits = *R_IRQ_MASK0_RD;
 
 	/* check for underrun irq */
@@ -1291,7 +1184,6 @@
 		SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, clr);
 		*R_NETWORK_TR_CTRL = network_tr_ctrl_shadow;
 		SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, nop);
-		*R_NETWORK_TR_CTRL = IO_STATE(R_NETWORK_TR_CTRL, clr_error, clr);
 		np->stats.tx_errors++;
 		D(printk("ethernet excessive collisions!\n"));
 	}
@@ -1304,12 +1196,13 @@
 {
 	struct sk_buff *skb;
 	int length = 0;
-	struct net_local *np = (struct net_local *)dev->priv;
+	struct net_local *np = netdev_priv(dev);
 	unsigned char *skb_data_ptr;
 #ifdef ETHDEBUG
 	int i;
 #endif
-
+	etrax_eth_descr *prevRxDesc;  /* The descriptor right before myNextRxDesc */
+	spin_lock(&np->led_lock);
 	if (!led_active && time_after(jiffies, led_next_time)) {
 		/* light the network leds depending on the current speed. */
 		e100_set_network_leds(NETWORK_ACTIVITY);
@@ -1319,9 +1212,10 @@
 		led_active = 1;
 		mod_timer(&clear_led_timer, jiffies + HZ/10);
 	}
+	spin_unlock(&np->led_lock);
 
 	length = myNextRxDesc->descr.hw_len - 4;
-	((struct net_local *)dev->priv)->stats.rx_bytes += length;
+	np->stats.rx_bytes += length;
 
 #ifdef ETHDEBUG
 	printk("Got a packet of length %d:\n", length);
@@ -1341,7 +1235,7 @@
 		if (!skb) {
 			np->stats.rx_errors++;
 			printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
-			return;
+			goto update_nextrxdesc;
 		}
 
 		skb_put(skb, length - ETHER_HEAD_LEN);        /* allocate room for the packet body */
@@ -1358,15 +1252,15 @@
 	else {
 		/* Large packet, send directly to upper layers and allocate new
 		 * memory (aligned to cache line boundary to avoid bug).
-		 * Before sending the skb to upper layers we must make sure that
-		 * skb->data points to the aligned start of the packet.
+		 * Before sending the skb to upper layers we must make sure
+		 * that skb->data points to the aligned start of the packet.
 		 */
 		int align;
 		struct sk_buff *new_skb = dev_alloc_skb(MAX_MEDIA_DATA_SIZE + 2 * L1_CACHE_BYTES);
 		if (!new_skb) {
 			np->stats.rx_errors++;
 			printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
-			return;
+			goto update_nextrxdesc;
 		}
 		skb = myNextRxDesc->skb;
 		align = (int)phys_to_virt(myNextRxDesc->descr.buf) - (int)skb->data;
@@ -1382,9 +1276,10 @@
 	/* Send the packet to the upper layers */
 	netif_rx(skb);
 
+  update_nextrxdesc:
 	/* Prepare for next packet */
 	myNextRxDesc->descr.status = 0;
-	myPrevRxDesc = myNextRxDesc;
+	prevRxDesc = myNextRxDesc;
 	myNextRxDesc = phys_to_virt(myNextRxDesc->descr.next);
 
 	rx_queue_len++;
@@ -1392,9 +1287,9 @@
 	/* Check if descriptors should be returned */
 	if (rx_queue_len == RX_QUEUE_THRESHOLD) {
 		flush_etrax_cache();
-		myPrevRxDesc->descr.ctrl |= d_eol;
+		prevRxDesc->descr.ctrl |= d_eol;
 		myLastRxDesc->descr.ctrl &= ~d_eol;
-		myLastRxDesc = myPrevRxDesc;
+		myLastRxDesc = prevRxDesc;
 		rx_queue_len = 0;
 	}
 }
@@ -1403,7 +1298,7 @@
 static int
 e100_close(struct net_device *dev)
 {
-	struct net_local *np = (struct net_local *)dev->priv;
+	struct net_local *np = netdev_priv(dev);
 
 	printk(KERN_INFO "Closing %s.\n", dev->name);
 
@@ -1431,6 +1326,9 @@
 	free_irq(NETWORK_DMA_TX_IRQ_NBR, (void *)dev);
 	free_irq(NETWORK_STATUS_IRQ_NBR, (void *)dev);
 
+	cris_free_dma(NETWORK_TX_DMA_NBR, cardname);
+	cris_free_dma(NETWORK_RX_DMA_NBR, cardname);
+
 	/* Update the statistics here. */
 
 	update_rx_stats(&np->stats);
@@ -1448,46 +1346,56 @@
 {
 	struct mii_ioctl_data *data = if_mii(ifr);
 	struct net_local *np = netdev_priv(dev);
+	int ret = 0;
+        int old_autoneg;
 
 	spin_lock(&np->lock); /* Preempt protection */
 	switch (cmd) {
-		case SIOCGMIIPHY: /* Get PHY address */
+		case SIOCGMIIPHY:               /* Get PHY address */
 			data->phy_id = mdio_phy_addr;
 			break;
-		case SIOCGMIIREG: /* Read MII register */
+		case SIOCGMIIREG:               /* Read MII register */
 			data->val_out = e100_get_mdio_reg(dev, mdio_phy_addr, data->reg_num);
 			break;
-		case SIOCSMIIREG: /* Write MII register */
+		case SIOCSMIIREG:               /* Write MII register */
 			e100_set_mdio_reg(dev, mdio_phy_addr, data->reg_num, data->val_in);
 			break;
+
 		/* The ioctls below should be considered obsolete but are */
 		/* still present for compatability with old scripts/apps  */
-		case SET_ETH_SPEED_10:                  /* 10 Mbps */
+		case SET_ETH_SPEED_10:          /* 10 Mbps */
 			e100_set_speed(dev, 10);
 			break;
-		case SET_ETH_SPEED_100:                /* 100 Mbps */
+		case SET_ETH_SPEED_100:         /* 100 Mbps */
 			e100_set_speed(dev, 100);
 			break;
-		case SET_ETH_SPEED_AUTO:              /* Auto negotiate speed */
+		case SET_ETH_SPEED_AUTO:        /* Auto-negotiate speed */
 			e100_set_speed(dev, 0);
 			break;
-		case SET_ETH_DUPLEX_HALF:              /* Half duplex. */
+		case SET_ETH_DUPLEX_HALF:       /* Half duplex */
 			e100_set_duplex(dev, half);
 			break;
-		case SET_ETH_DUPLEX_FULL:              /* Full duplex. */
+		case SET_ETH_DUPLEX_FULL:       /* Full duplex */
 			e100_set_duplex(dev, full);
 			break;
-		case SET_ETH_DUPLEX_AUTO:             /* Autonegotiate duplex*/
+		case SET_ETH_DUPLEX_AUTO:       /* Auto-negotiate duplex */
 			e100_set_duplex(dev, autoneg);
 			break;
+	        case SET_ETH_AUTONEG:
+			old_autoneg = autoneg_normal;
+		        autoneg_normal = *(int*)data;
+			if (autoneg_normal != old_autoneg)
+				e100_negotiate(dev);
+			break;
 		default:
+			spin_unlock(&np->lock);
 			return -EINVAL;
 	}
 	spin_unlock(&np->lock);
-	return 0;
+	return ret;
 }
 
-static int e100_set_settings(struct net_device *dev,
+static int e100_get_settings(struct net_device *dev,
 			     struct ethtool_cmd *ecmd)
 {
 	ecmd->supported = SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII |
@@ -1565,7 +1473,8 @@
 static int
 e100_set_config(struct net_device *dev, struct ifmap *map)
 {
-	struct net_local *np = (struct net_local *)dev->priv;
+	struct net_local *np = netdev_priv(dev);
+
 	spin_lock(&np->lock); /* Preempt protection */
 
 	switch(map->port) {
@@ -1574,21 +1483,25 @@
 			e100_set_speed(dev, 0);
 			e100_set_duplex(dev, autoneg);
 			break;
+
 		case IF_PORT_10BASET:
 			e100_set_speed(dev, 10);
 			e100_set_duplex(dev, autoneg);
 			break;
+
 		case IF_PORT_100BASET:
 		case IF_PORT_100BASETX:
 			e100_set_speed(dev, 100);
 			e100_set_duplex(dev, autoneg);
 			break;
+
 		case IF_PORT_100BASEFX:
 		case IF_PORT_10BASE2:
 		case IF_PORT_AUI:
 			spin_unlock(&np->lock);
 			return -EOPNOTSUPP;
 			break;
+
 		default:
 			printk(KERN_ERR "%s: Invalid media selected", dev->name);
 			spin_unlock(&np->lock);
@@ -1602,6 +1515,7 @@
 update_rx_stats(struct net_device_stats *es)
 {
 	unsigned long r = *R_REC_COUNTERS;
+
 	/* update stats relevant to reception errors */
 	es->rx_fifo_errors += IO_EXTRACT(R_REC_COUNTERS, congestion, r);
 	es->rx_crc_errors += IO_EXTRACT(R_REC_COUNTERS, crc_error, r);
@@ -1613,11 +1527,11 @@
 update_tx_stats(struct net_device_stats *es)
 {
 	unsigned long r = *R_TR_COUNTERS;
+
 	/* update stats relevant to transmission errors */
 	es->collisions +=
 		IO_EXTRACT(R_TR_COUNTERS, single_col, r) +
 		IO_EXTRACT(R_TR_COUNTERS, multiple_col, r);
-	es->tx_errors += IO_EXTRACT(R_TR_COUNTERS, deferred, r);
 }
 
 /*
@@ -1627,8 +1541,9 @@
 static struct net_device_stats *
 e100_get_stats(struct net_device *dev)
 {
-	struct net_local *lp = (struct net_local *)dev->priv;
+	struct net_local *lp = netdev_priv(dev);
 	unsigned long flags;
+
 	spin_lock_irqsave(&lp->lock, flags);
 
 	update_rx_stats(&lp->stats);
@@ -1640,21 +1555,21 @@
 
 /*
  * Set or clear the multicast filter for this adaptor.
- * num_addrs == -1	Promiscuous mode, receive all packets
- * num_addrs == 0	Normal mode, clear multicast list
- * num_addrs > 0	Multicast mode, receive normal and MC packets,
- *			and do best-effort filtering.
+ * num_addrs == -1      Promiscuous mode, receive all packets
+ * num_addrs == 0       Normal mode, clear multicast list
+ * num_addrs > 0        Multicast mode, receive normal and MC packets,
+ *                      and do best-effort filtering.
  */
 static void
 set_multicast_list(struct net_device *dev)
 {
-	struct net_local *lp = (struct net_local *)dev->priv;
+	struct net_local *lp = netdev_priv(dev);
 	int num_addr = dev->mc_count;
 	unsigned long int lo_bits;
 	unsigned long int hi_bits;
+
 	spin_lock(&lp->lock);
-	if (dev->flags & IFF_PROMISC)
-	{
+	if (dev->flags & IFF_PROMISC) {
 		/* promiscuous mode */
 		lo_bits = 0xfffffffful;
 		hi_bits = 0xfffffffful;
@@ -1684,9 +1599,10 @@
 		struct dev_mc_list *dmi = dev->mc_list;
 		int i;
 		char *baddr;
+
 		lo_bits = 0x00000000ul;
 		hi_bits = 0x00000000ul;
-		for (i=0; i<num_addr; i++) {
+		for (i = 0; i < num_addr; i++) {
 			/* Calculate the hash index for the GA registers */
 
 			hash_ix = 0;
@@ -1713,8 +1629,7 @@
 
 			if (hash_ix >= 32) {
 				hi_bits |= (1 << (hash_ix-32));
-			}
-			else {
+			} else {
 				lo_bits |= (1 << hash_ix);
 			}
 			dmi = dmi->next;
@@ -1729,10 +1644,11 @@
 }
 
 void
-e100_hardware_send_packet(char *buf, int length)
+e100_hardware_send_packet(struct net_local *np, char *buf, int length)
 {
 	D(printk("e100 send pack, buf 0x%x len %d\n", buf, length));
 
+	spin_lock(&np->led_lock);
 	if (!led_active && time_after(jiffies, led_next_time)) {
 		/* light the network leds depending on the current speed. */
 		e100_set_network_leds(NETWORK_ACTIVITY);
@@ -1742,15 +1658,16 @@
 		led_active = 1;
 		mod_timer(&clear_led_timer, jiffies + HZ/10);
 	}
+	spin_unlock(&np->led_lock);
 
 	/* configure the tx dma descriptor */
 	myNextTxDesc->descr.sw_len = length;
 	myNextTxDesc->descr.ctrl = d_eop | d_eol | d_wait;
 	myNextTxDesc->descr.buf = virt_to_phys(buf);
 
-        /* Move end of list */
-        myLastTxDesc->descr.ctrl &= ~d_eol;
-        myLastTxDesc = myNextTxDesc;
+	/* Move end of list */
+	myLastTxDesc->descr.ctrl &= ~d_eol;
+	myLastTxDesc = myNextTxDesc;
 
 	/* Restart DMA channel */
 	*R_DMA_CH0_CMD = IO_STATE(R_DMA_CH0_CMD, cmd, restart);
@@ -1759,6 +1676,11 @@
 static void
 e100_clear_network_leds(unsigned long dummy)
 {
+	struct net_device *dev = (struct net_device *)dummy;
+	struct net_local *np = netdev_priv(dev);
+
+	spin_lock(&np->led_lock);
+
 	if (led_active && time_after(jiffies, led_next_time)) {
 		e100_set_network_leds(NO_NETWORK_ACTIVITY);
 
@@ -1766,6 +1688,8 @@
 		led_next_time = jiffies + NET_FLASH_PAUSE;
 		led_active = 0;
 	}
+
+	spin_unlock(&np->led_lock);
 }
 
 static void
@@ -1786,19 +1710,25 @@
 #else
 		LED_NETWORK_SET(LED_OFF);
 #endif
-	}
-	else if (light_leds) {
+	} else if (light_leds) {
 		if (current_speed == 10) {
 			LED_NETWORK_SET(LED_ORANGE);
 		} else {
 			LED_NETWORK_SET(LED_GREEN);
 		}
-	}
-	else {
+	} else {
 		LED_NETWORK_SET(LED_OFF);
 	}
 }
 
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void
+e100_netpoll(struct net_device* netdev)
+{
+	e100rxtx_interrupt(NETWORK_DMA_TX_IRQ_NBR, netdev, NULL);
+}
+#endif
+
 static int
 etrax_init_module(void)
 {
diff -urN linux-2.6.19.2.orig/drivers/net/cris/eth_v32.c linux-2.6.19.2.dev/drivers/net/cris/eth_v32.c
--- linux-2.6.19.2.orig/drivers/net/cris/eth_v32.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.19.2.dev/drivers/net/cris/eth_v32.c	2007-02-06 11:10:37.000000000 +0100
@@ -0,0 +1,2305 @@
+/*
+ * Driver for the ETRAX FS network controller.
+ *
+ * Copyright (c) 2003-2006 Axis Communications AB.
+ */
+
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ptrace.h>
+#include <linux/ioport.h>
+#include <linux/in.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/spinlock.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/cpufreq.h>
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/ethtool.h>
+#include <linux/mii.h>
+
+#include <asm/io.h>		/* LED_* I/O functions */
+#include <asm/irq.h>
+#include <asm/arch/hwregs/reg_map.h>
+#include <asm/arch/hwregs/reg_rdwr.h>
+#include <asm/arch/hwregs/dma.h>
+#include <asm/arch/hwregs/eth_defs.h>
+#include <asm/arch/hwregs/config_defs.h>
+#include <asm/arch/hwregs/intr_vect_defs.h>
+#include <asm/system.h>
+#include <asm/bitops.h>
+#include <asm/ethernet.h>
+#include <asm/arch/dma.h>
+#include <asm/arch/intmem.h>
+#include <asm/arch/pinmux.h>
+
+#include "eth_v32.h"
+
+#define DEBUG(x)
+#define GET_BIT(bit,val)   (((val) >> (bit)) & 0x01)
+
+/* Toggle network LEDs on/off at runtime */
+static int use_network_leds = 1;
+
+static void update_rx_stats(struct crisv32_ethernet_local *np);
+static void update_tx_stats(struct crisv32_ethernet_local *np); 
+static void crisv32_eth_setup_controller(struct net_device *dev);
+static int  crisv32_eth_request_irqdma(struct net_device *dev);
+static void crisv32_eth_init_rings(struct net_device *dev);
+static void crisv32_eth_reset_rings(struct net_device *dev);
+static void crisv32_ethernet_bug(struct net_device *dev);
+
+/*
+ * The name of the card. Is used for messages and in the requests for
+ * io regions, irqs and dma channels.
+ */
+static const char *cardname = "ETRAX FS built-in ethernet controller";
+
+static int autoneg_normal = 1;
+
+/* Some chipset needs special care. */
+struct transceiver_ops transceivers[] = {
+	{0x1018, broadcom_check_speed, broadcom_check_duplex},
+	/* TDK 2120 and TDK 2120C */
+	{0xC039, tdk_check_speed, tdk_check_duplex}, 
+	{0x039C, tdk_check_speed, tdk_check_duplex},	
+	/* Intel LXT972A*/
+	{0x04de, intel_check_speed, intel_check_duplex},
+	/* National Semiconductor DP83865 */
+	{0x0017, national_check_speed, national_check_duplex},
+	/* Generic, must be last. */
+	{0x0000, generic_check_speed, generic_check_duplex}
+};
+
+static struct net_device *crisv32_dev[2];
+static struct crisv32_eth_leds *crisv32_leds[3];
+
+#ifdef CONFIG_CPU_FREQ
+static int
+crisv32_ethernet_freq_notifier(struct notifier_block *nb, unsigned long val,
+			       void *data);
+
+static struct notifier_block crisv32_ethernet_freq_notifier_block = {
+	.notifier_call	= crisv32_ethernet_freq_notifier
+};
+#endif
+
+/*
+ * mask in and out tx/rx interrupts.
+ */
+static inline void crisv32_disable_tx_ints(struct crisv32_ethernet_local *np)
+{
+	reg_dma_rw_intr_mask intr_mask_tx = { .data = regk_dma_no };
+	REG_WR(dma, np->dma_out_inst, rw_intr_mask, intr_mask_tx);
+}
+
+static inline void crisv32_enable_tx_ints(struct crisv32_ethernet_local *np)
+{
+	reg_dma_rw_intr_mask intr_mask_tx = { .data = regk_dma_yes };
+	REG_WR(dma, np->dma_out_inst, rw_intr_mask, intr_mask_tx);
+}
+
+static inline void crisv32_disable_rx_ints(struct crisv32_ethernet_local *np)
+{
+	reg_dma_rw_intr_mask intr_mask_rx = { .in_eop = regk_dma_no };
+	REG_WR(dma, np->dma_in_inst, rw_intr_mask, intr_mask_rx);
+}
+
+static inline void crisv32_enable_rx_ints(struct crisv32_ethernet_local *np)
+{
+	reg_dma_rw_intr_mask intr_mask_rx = { .in_eop = regk_dma_yes };
+	REG_WR(dma, np->dma_in_inst, rw_intr_mask, intr_mask_rx);
+}
+
+/* start/stop receiver */
+static inline void crisv32_start_receiver(struct crisv32_ethernet_local *np)
+{
+	reg_eth_rw_rec_ctrl rec_ctrl;
+	
+	rec_ctrl = REG_RD(eth, np->eth_inst, rw_rec_ctrl);
+	rec_ctrl.ma0 = regk_eth_yes;
+	rec_ctrl.broadcast = regk_eth_rec;
+	REG_WR(eth, np->eth_inst, rw_rec_ctrl, rec_ctrl);
+}
+
+static inline void crisv32_stop_receiver(struct crisv32_ethernet_local *np)
+{
+	reg_eth_rw_rec_ctrl rec_ctrl;
+
+	rec_ctrl = REG_RD(eth, np->eth_inst, rw_rec_ctrl);
+	rec_ctrl.ma0 = regk_eth_no;
+	rec_ctrl.broadcast = regk_eth_discard;
+	REG_WR(eth, np->eth_inst, rw_rec_ctrl, rec_ctrl);
+}
+
+static int __init
+crisv32_eth_request_irqdma(struct net_device *dev)
+{
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	
+	/* Allocate IRQs and DMAs. */
+	if (np->eth_inst == regi_eth0) {
+		if (request_irq(DMA0_INTR_VECT, crisv32tx_eth_interrupt, 
+				0, cardname, dev)) {
+			return -EAGAIN;
+		}
+
+		if (request_irq(DMA1_INTR_VECT, crisv32rx_eth_interrupt,
+				IRQF_SAMPLE_RANDOM, cardname, dev)) {
+			goto err0_1; 
+		}
+		
+		if (crisv32_request_dma(0, cardname, DMA_VERBOSE_ON_ERROR,
+					12500000, dma_eth0))
+			goto err0_2;
+		
+		if (crisv32_request_dma(1, cardname, DMA_VERBOSE_ON_ERROR,
+					12500000, dma_eth0))
+			goto err0_3;
+		
+		if (request_irq(ETH0_INTR_VECT, crisv32nw_eth_interrupt, 0,
+				cardname, dev)) {
+			crisv32_free_dma(1);
+		  err0_3:
+			crisv32_free_dma(0);
+		  err0_2:
+			free_irq(DMA1_INTR_VECT, dev);
+		  err0_1:
+			free_irq(DMA0_INTR_VECT, dev);
+			return -EAGAIN;
+		}
+	} else {
+		if (request_irq(DMA6_INTR_VECT, crisv32tx_eth_interrupt,
+				0, cardname, dev))
+			return -EAGAIN;
+		
+		if (request_irq(DMA7_INTR_VECT, crisv32rx_eth_interrupt,
+				IRQF_SAMPLE_RANDOM, cardname, dev))
+			goto err1_1;
+
+		if (crisv32_request_dma(6, cardname, DMA_VERBOSE_ON_ERROR,
+					0, dma_eth1))
+			goto err1_2;
+
+		if (crisv32_request_dma(7, cardname, DMA_VERBOSE_ON_ERROR,
+					0, dma_eth1))
+			goto err1_3;
+
+		if (request_irq(ETH1_INTR_VECT, crisv32nw_eth_interrupt, 0,
+				cardname, dev)) {
+			crisv32_free_dma(7);
+		  err1_3:
+			crisv32_free_dma(6);
+		  err1_2:
+			free_irq(DMA7_INTR_VECT, dev);
+		  err1_1:
+			free_irq(DMA6_INTR_VECT, dev);
+			return -EAGAIN;
+		}
+	}
+	return 0;
+}
+
+static void __init
+crisv32_eth_setup_controller(struct net_device *dev)
+{
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	
+	reg_config_rw_pad_ctrl pad_ctrl;
+	
+	reg_eth_rw_tr_ctrl tr_ctrl = {
+		.retry = regk_eth_yes,
+		.pad = regk_eth_yes,
+		.crc = regk_eth_yes
+	};
+	
+	reg_eth_rw_rec_ctrl rec_ctrl = {
+		.ma0 = regk_eth_no,       /* enable at open() */
+		.broadcast = regk_eth_no,
+		.max_size = regk_eth_size1522
+	};
+		
+	reg_eth_rw_ga_lo ga_lo = { 0 };
+	reg_eth_rw_ga_hi ga_hi = { 0 };
+
+	reg_eth_rw_gen_ctrl gen_ctrl = {
+	  .phy = regk_eth_mii_clk,
+	  .flow_ctrl = regk_eth_yes
+	};
+
+	/* 
+	 * Initialize group address registers to make sure that no
+	 * unwanted addresses are matched.
+	 */
+	REG_WR(eth, np->eth_inst, rw_ga_lo, ga_lo);
+	REG_WR(eth, np->eth_inst, rw_ga_hi, ga_hi);
+	
+	/* Configure receiver and transmitter */
+	REG_WR(eth, np->eth_inst, rw_rec_ctrl, rec_ctrl);
+	REG_WR(eth, np->eth_inst, rw_tr_ctrl, tr_ctrl);
+
+	/* Enable ethernet controller with mii clk. */
+	REG_WR(eth, np->eth_inst, rw_gen_ctrl, gen_ctrl);
+	gen_ctrl.en = regk_eth_yes;
+	REG_WR(eth, np->eth_inst, rw_gen_ctrl, gen_ctrl);
+	
+	/* keep reset low (RESET_LEN) */
+	udelay(500);
+
+	/* done */
+	pad_ctrl = REG_RD(config, regi_config, rw_pad_ctrl);
+	pad_ctrl.phyrst_n = 1;
+	REG_WR(config, regi_config, rw_pad_ctrl, pad_ctrl);
+
+	/* Let the PHY reset (RESET_WAIT) */
+	udelay(200);
+		
+	crisv32_eth_probe_transceiver(dev);
+}
+
+static void __init
+crisv32_eth_init_rings(struct net_device *dev)
+{
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	int i;
+	
+	/* Initialise receive descriptors for interface. */
+	for (i = 0; i < NBR_RX_DESC; i++) {
+		struct sk_buff *skb = dev_alloc_skb(MAX_MEDIA_DATA_SIZE);
+
+		np->dma_rx_descr_list[i].skb = skb;
+		np->dma_rx_descr_list[i].descr.buf =
+			(char*)virt_to_phys(skb->data);
+		np->dma_rx_descr_list[i].descr.after =
+		    (char*)virt_to_phys(skb->data + MAX_MEDIA_DATA_SIZE);
+
+		np->dma_rx_descr_list[i].descr.eol = 0;
+		np->dma_rx_descr_list[i].descr.in_eop = 0;
+		np->dma_rx_descr_list[i].descr.next =
+		    (void *) virt_to_phys(&np->dma_rx_descr_list[i + 1].descr);
+	}
+	/* bend the list into a ring */	
+	np->dma_rx_descr_list[NBR_RX_DESC - 1].descr.next =
+		(void *) virt_to_phys(&np->dma_rx_descr_list[0].descr);
+	
+	/* Initialize transmit descriptors. */
+	for (i = 0; i < NBR_TX_DESC; i++) {
+		np->dma_tx_descr_list[i].descr.wait = 1;
+		np->dma_tx_descr_list[i].descr.eol = 0;
+		np->dma_tx_descr_list[i].descr.out_eop = 0;
+		np->dma_tx_descr_list[i].descr.next =
+			(void*)virt_to_phys(&np->dma_tx_descr_list[i+1].descr);
+	}
+	/* bend the list into a ring */
+	np->dma_tx_descr_list[NBR_TX_DESC - 1].descr.next =
+		(void *) virt_to_phys(&np->dma_tx_descr_list[0].descr);
+
+	crisv32_eth_reset_rings(dev);
+}
+
+static void
+crisv32_eth_reset_rings(struct net_device *dev)
+{
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	int i;
+
+	/* free un-handled tx packets */       
+	while(np->txpackets
+	      || np->catch_tx_desc != np->active_tx_desc) {
+		np->txpackets--;
+		if (np->catch_tx_desc->skb)
+			dev_kfree_skb(np->catch_tx_desc->skb);
+		
+		np->catch_tx_desc->skb = 0;
+		np->catch_tx_desc =
+			phys_to_virt((int)np->catch_tx_desc->descr.next);
+	} while (np->catch_tx_desc != np->active_tx_desc);
+	WARN_ON(np->txpackets != 0);
+	np->txpackets = 0;
+
+	/* cleanup the rx-ring */
+	for (i = 0; i < NBR_RX_DESC; i++) {
+		struct sk_buff *skb;
+		skb = np->dma_rx_descr_list[i].skb;
+		if (!skb
+		    || (np->dma_rx_descr_list[i].descr.buf !=
+			(void *)virt_to_phys(skb->data)))
+		{		       
+			printk("%s:%d: damaged rx-ring! "
+			       "i=%d skb=%p %lx %lx %p %p\n",
+			       __func__, __LINE__, i,
+			       skb,
+			       virt_to_phys(skb->data),
+			       virt_to_phys(skb->data + MAX_MEDIA_DATA_SIZE),
+			       np->dma_rx_descr_list[i].descr.buf,
+			       np->dma_rx_descr_list[i].descr.after);
+			WARN_ON(1);
+			crisv32_ethernet_bug(dev);			
+			if (skb)
+				dev_kfree_skb(skb);
+			skb = dev_alloc_skb(MAX_MEDIA_DATA_SIZE);
+			np->dma_rx_descr_list[i].skb = skb;
+			np->dma_rx_descr_list[i].descr.buf =
+				(char*)virt_to_phys(skb->data);
+		}
+		np->dma_rx_descr_list[i].descr.after =
+			(char*)virt_to_phys(skb->data
+					    + MAX_MEDIA_DATA_SIZE);
+		np->dma_rx_descr_list[i].descr.eol = 0;
+		np->dma_rx_descr_list[i].descr.in_eop = 0;
+		/* Workaround cache bug */
+		flush_dma_descr(&np->dma_rx_descr_list[i].descr, 1); 
+	}
+	
+	/* reset rx-ring */
+	np->active_rx_desc = &np->dma_rx_descr_list[0];
+	np->prev_rx_desc = &np->dma_rx_descr_list[NBR_RX_DESC - 1];
+	np->last_rx_desc = np->prev_rx_desc;
+	np->dma_rx_descr_list[NBR_RX_DESC - 1].descr.eol = 1;
+	
+	/* reset tx-ring */
+	np->dma_tx_descr_list[0].descr.buf =
+		np->dma_tx_descr_list[0].descr.after = 0;
+	np->dma_rx_descr_list[i].descr.in_eop = 0;
+	np->dma_tx_descr_list[0].descr.eol = 1;
+	
+	np->active_tx_desc = &np->dma_tx_descr_list[0];
+	np->prev_tx_desc = &np->dma_tx_descr_list[NBR_TX_DESC - 1];
+	np->catch_tx_desc = &np->dma_tx_descr_list[0];
+	
+	/* Fill context descriptors. */
+	np->ctxt_in.next = 0;
+	np->ctxt_in.saved_data =
+		(void *)virt_to_phys(&np->active_rx_desc->descr);
+	np->ctxt_in.saved_data_buf = np->active_rx_desc->descr.buf;
+		
+	np->ctxt_out.next = 0;
+	np->ctxt_out.saved_data =
+		(void *)virt_to_phys(&np->dma_tx_descr_list[0].descr);
+}
+
+static void __init
+crisv32_init_leds(int ledgrp, struct net_device* dev)
+{
+	struct timer_list timer_init = TIMER_INITIALIZER(NULL, 0, 0);
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+
+	/* Use already allocated led grp if initialized */
+	if (crisv32_leds[ledgrp] != NULL) {
+		np->leds = crisv32_leds[ledgrp];
+		return;
+	}
+
+	crisv32_leds[ledgrp] = kmalloc(sizeof(struct crisv32_eth_leds),GFP_KERNEL);
+
+	crisv32_leds[ledgrp]->ledgrp = ledgrp;
+	crisv32_leds[ledgrp]->led_active = 0;
+	/* NOTE: Should this value be set to zero as the jiffies timer can wrap? */
+	crisv32_leds[ledgrp]->led_next_time = jiffies;
+
+	crisv32_leds[ledgrp]->clear_led_timer = timer_init;
+	crisv32_leds[ledgrp]->clear_led_timer.function = crisv32_clear_network_leds;
+	crisv32_leds[ledgrp]->clear_led_timer.data = (unsigned long) dev;
+
+	spin_lock_init(&crisv32_leds[ledgrp]->led_lock);
+
+	np->leds = crisv32_leds[ledgrp];
+}
+
+static int __init
+crisv32_ethernet_init(void)
+{
+	struct crisv32_ethernet_local *np;
+	int ret = 0;
+
+	printk("ETRAX FS 10/100MBit ethernet v0.01 (c)"
+	       " 2003 Axis Communications AB\n");
+
+#ifdef CONFIG_ETRAX_ETHERNET_IFACE0
+{
+	int iface0 = 0;
+	/* Default MAC address for interface 0.
+	 * The real one will be set later. */
+	static struct sockaddr default_mac_iface0 = 
+		{0, {0x00, 0x40, 0x8C, 0xCD, 0x00, 0x00}};
+	
+	if (!(crisv32_dev[iface0] = alloc_etherdev(sizeof *np)))
+		return -ENOMEM;
+	
+	ret |= crisv32_ethernet_device_init(crisv32_dev[iface0]);
+	
+#if defined(CONFIG_ETRAX_ETH0_USE_LEDGRP0)
+	crisv32_init_leds(LED_GRP_0,crisv32_dev[iface0]);
+#elif defined(CONFIG_ETRAX_ETH0_USE_LEDGRP1)
+	crisv32_init_leds(LED_GRP_1,crisv32_dev[iface0]);
+#else
+	crisv32_init_leds(LED_GRP_NONE,crisv32_dev[iface0]);
+#endif
+
+	np = (struct crisv32_ethernet_local *) crisv32_dev[iface0]->priv;
+	np->eth_inst = regi_eth0;
+	np->dma_out_inst = regi_dma0;
+	np->dma_in_inst = regi_dma1;
+	
+	register_netdev(crisv32_dev[iface0]);
+	
+	/* Set up default MAC address */
+	memcpy(crisv32_dev[iface0]->dev_addr, default_mac_iface0.sa_data, 6);
+	crisv32_eth_set_mac_address(crisv32_dev[iface0], &default_mac_iface0);
+	if (crisv32_eth_request_irqdma(crisv32_dev[iface0]))
+		printk("%s: eth0 unable to allocate IRQ and DMA resources\n",
+		       __func__);
+	np->txpackets = 0;
+	crisv32_eth_init_rings(crisv32_dev[iface0]);
+	crisv32_eth_setup_controller(crisv32_dev[iface0]);
+}
+#endif /* CONFIG_ETRAX_ETHERNET_IFACE0 */
+
+#ifdef CONFIG_ETRAX_ETHERNET_IFACE1
+{
+	int iface1 = 0;
+	/* Default MAC address for interface 1.
+	 * The real one will be set later. */
+	static struct sockaddr default_mac_iface1 = 
+		{0, {0x00, 0x40, 0x8C, 0xCD, 0x00, 0x01}};
+
+	if (crisv32_pinmux_alloc_fixed(pinmux_eth1))
+		panic("Eth pinmux\n");
+
+	/* Increase index to device array if interface 0 is enabled as well.*/
+#ifdef CONFIG_ETRAX_ETHERNET_IFACE0
+	iface1++;
+#endif
+	if (!(crisv32_dev[iface1] = alloc_etherdev(sizeof *np)))
+		return -ENOMEM;
+	
+	ret |= crisv32_ethernet_device_init(crisv32_dev[iface1]);
+
+#if defined(CONFIG_ETRAX_ETH1_USE_LEDGRP0)
+	crisv32_init_leds(LED_GRP_0,crisv32_dev[iface1]);
+#elif defined(CONFIG_ETRAX_ETH1_USE_LEDGRP1)
+	crisv32_init_leds(LED_GRP_1,crisv32_dev[iface1]);
+#else
+	crisv32_init_leds(LED_GRP_NONE,crisv32_dev[iface1]);
+#endif
+
+	np = (struct crisv32_ethernet_local *) crisv32_dev[iface1]->priv;
+	np->eth_inst = regi_eth1;
+	np->dma_out_inst = regi_dma6;
+	np->dma_in_inst = regi_dma7;
+	
+	register_netdev(crisv32_dev[iface1]);
+
+	/* Set up default MAC address */
+	memcpy(crisv32_dev[iface1]->dev_addr, default_mac_iface1.sa_data, 6);
+	crisv32_eth_set_mac_address(crisv32_dev[iface1], &default_mac_iface1);
+	
+	if (crisv32_eth_request_irqdma(crisv32_dev[iface1]))
+		printk("%s: eth1 unable to allocate IRQ and DMA resources\n",
+		       __func__);
+	np->txpackets = 0;
+	crisv32_eth_init_rings(crisv32_dev[iface1]);
+	crisv32_eth_setup_controller(crisv32_dev[iface1]);
+}
+#endif /* CONFIG_ETRAX_ETHERNET_IFACE1 */
+
+#ifdef CONFIG_CPU_FREQ
+	cpufreq_register_notifier(&crisv32_ethernet_freq_notifier_block,
+				  CPUFREQ_TRANSITION_NOTIFIER);
+#endif
+
+	return ret;
+}
+
+static int __init
+crisv32_ethernet_device_init(struct net_device* dev)
+{
+	struct timer_list timer_init = TIMER_INITIALIZER(NULL, 0, 0);
+	struct crisv32_ethernet_local *np;
+
+	dev->base_addr = 0;	/* Just to have something to show. */
+
+	/* we do our own locking */
+	dev->features |= NETIF_F_LLTX;
+	
+	/* We use several IRQs and DMAs so just report 0 here. */
+	dev->irq = 0;
+	dev->dma = 0;
+
+	/* 
+	 * Fill in our handlers so the network layer can talk to us in the
+	 * future. 
+	 */
+	dev->open = crisv32_eth_open;
+	dev->hard_start_xmit = crisv32_eth_send_packet;
+	dev->stop = crisv32_eth_close;
+	dev->get_stats = crisv32_get_stats;
+	dev->set_multicast_list = crisv32_eth_set_multicast_list;
+	dev->set_mac_address = crisv32_eth_set_mac_address;
+	dev->ethtool_ops = &crisv32_ethtool_ops;
+	dev->do_ioctl = crisv32_eth_ioctl;
+	dev->set_config	= crisv32_eth_set_config;
+	dev->tx_timeout = crisv32_eth_tx_timeout;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	dev->poll_controller = crisv32_netpoll;
+#endif
+	
+	np = netdev_priv(dev);
+
+	spin_lock_init(&np->lock);
+	spin_lock_init(&np->transceiver_lock);
+	
+	/* Initialize speed indicator stuff. */
+	np->current_speed = 10;
+	np->current_speed_selection = 0;	/* Auto. */
+	np->speed_timer = timer_init;
+	np->speed_timer.expires = jiffies + NET_LINK_UP_CHECK_INTERVAL;
+	np->speed_timer.data = (unsigned long) dev;
+	np->speed_timer.function = crisv32_eth_check_speed;
+
+	np->full_duplex = 0;
+	np->current_duplex = autoneg;
+	np->duplex_timer = timer_init;
+	np->duplex_timer.expires = jiffies + NET_DUPLEX_CHECK_INTERVAL;
+	np->duplex_timer.data = (unsigned long) dev;
+	np->duplex_timer.function = crisv32_eth_check_duplex;
+	
+	return 0;
+}
+
+static int
+crisv32_eth_open(struct net_device *dev)
+{
+	struct sockaddr mac_addr;
+	reg_dma_rw_ack_intr ack_intr = { .data = 1,.in_eop = 1 };
+	reg_dma_rw_cfg dma_cfg = { .en = 1 };
+	reg_eth_rw_clr_err clr_err = {.clr = regk_eth_yes};
+	int intr_mask_nw = 0x1cff;
+	int eth_ack_intr = 0xffff;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+
+	spin_lock(&np->lock);
+#ifdef CONFIG_CRIS_MACH_ARTPEC3
+	np->gigabit_mode = 0;
+#endif
+	crisv32_disable_tx_ints(np);
+	crisv32_disable_rx_ints(np);
+	
+	REG_WR(eth, np->eth_inst, rw_clr_err, clr_err);
+	REG_WR_INT(eth, np->eth_inst, rw_ack_intr, eth_ack_intr);
+	REG_WR_INT(eth, np->eth_inst, rw_intr_mask, intr_mask_nw);
+	crisv32_eth_reset_rings(dev);
+	
+	/* Give the hardware an idea of what MAC address we want. */
+	memcpy(mac_addr.sa_data, dev->dev_addr, dev->addr_len);
+	crisv32_eth_set_mac_address(dev, &mac_addr);
+
+	/* Enable irq and make sure that the irqs are cleared. */
+	REG_WR(dma, np->dma_out_inst, rw_ack_intr, ack_intr);
+	REG_WR(dma, np->dma_in_inst, rw_ack_intr, ack_intr);
+	
+	/* Prepare input DMA. */
+	DMA_RESET(np->dma_in_inst);
+	DMA_ENABLE(np->dma_in_inst);
+#ifdef CONFIG_CRIS_MACH_ARTPEC3
+	DMA_WR_CMD(np->dma_in_inst, regk_dma_set_w_size2);
+#endif
+	DMA_START_CONTEXT( np->dma_in_inst, virt_to_phys(&np->ctxt_in));
+	DMA_CONTINUE(np->dma_in_inst);
+	crisv32_enable_rx_ints(np);
+	crisv32_start_receiver(np);	
+	
+	/* Prepare output DMA. */
+#ifdef CONFIG_CRIS_MACH_ARTPEC3
+	DMA_WR_CMD(np->dma_out_inst, regk_dma_set_w_size4);
+#endif
+	REG_WR(dma, np->dma_out_inst, rw_cfg, dma_cfg);
+	netif_start_queue(dev);
+	crisv32_enable_tx_ints(np);
+	
+	/* Start duplex/speed timers */
+	add_timer(&np->speed_timer);
+	add_timer(&np->duplex_timer);	
+
+	spin_unlock(&np->lock);
+	/* 
+	 * We are now ready to accept transmit requeusts from the queueing
+	 * layer of the networking.
+	 */
+	netif_carrier_on(dev);
+
+	return 0;
+}
+
+static int
+crisv32_eth_close(struct net_device *dev)
+{
+	reg_dma_rw_ack_intr ack_intr = {0};
+
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	unsigned long flags;
+
+	printk(KERN_INFO "Closing %s.\n", dev->name);
+
+	/* stop the receiver before the DMA channels to avoid overruns. */
+	crisv32_stop_receiver(np);
+	
+	spin_lock_irqsave(&np->lock, flags);
+	netif_stop_queue(dev);
+
+	/* Reset the TX DMA in case it has hung on something. */
+	DMA_RESET(np->dma_in_inst);
+
+	/* Stop DMA */
+	DMA_STOP(np->dma_in_inst);
+	DMA_STOP(np->dma_out_inst);
+
+	/* Disable irq and make sure that the irqs are cleared. */
+	crisv32_disable_tx_ints(np);
+	ack_intr.data = 1;
+	REG_WR(dma, np->dma_out_inst, rw_ack_intr, ack_intr);
+
+	crisv32_disable_rx_ints(np);
+	ack_intr.in_eop = 1;
+	REG_WR(dma, np->dma_in_inst, rw_ack_intr, ack_intr);
+
+	np->sender_started = 0;	
+	spin_unlock_irqrestore(&np->lock, flags);
+
+	/* Update the statistics. */
+	update_rx_stats(np);
+	update_tx_stats(np);
+
+	/* Stop speed/duplex timers */
+	del_timer(&np->speed_timer);
+	del_timer(&np->duplex_timer);
+
+	return 0;
+}
+
+static int
+crisv32_eth_set_mac_address(struct net_device *dev, void *vpntr)
+{
+	int i;
+	unsigned char *addr = ((struct sockaddr*)vpntr)->sa_data;
+	
+	reg_eth_rw_ma0_lo ma0_lo =
+	  { addr[0] | (addr[1] << 8) | (addr[2] << 16) | (addr[3] << 24)};
+	
+	reg_eth_rw_ma0_hi ma0_hi = { addr[4] | (addr[5] << 8) };
+
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+
+	/* Remember the address. */
+	memcpy(dev->dev_addr, addr, dev->addr_len);
+
+	/* 
+	 * Write the address to the hardware.
+	 * Note the way the address is wrapped:
+	 * ma0_l0 = a0_0 | (a0_1 << 8) | (a0_2 << 16) | (a0_3 << 24);
+	 * ma0_hi = a0_4 | (a0_5 << 8);
+	 */
+	REG_WR(eth, np->eth_inst, rw_ma0_lo, ma0_lo);
+	REG_WR(eth, np->eth_inst, rw_ma0_hi, ma0_hi);
+
+	printk(KERN_INFO "%s: changed MAC to ", dev->name);
+
+	for (i = 0; i < 5; i++)
+		printk("%02X:", dev->dev_addr[i]);
+
+	printk("%02X\n", dev->dev_addr[i]);
+
+	return 0;
+}
+
+static irqreturn_t
+crisv32rx_eth_interrupt(int irq, void *dev_id)
+{
+	reg_dma_r_masked_intr masked_in;
+	reg_dma_rw_cmd cmd = {0};
+	reg_dma_rw_ack_intr ack_intr = {0};	
+	struct net_device *dev = (struct net_device *) dev_id;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+
+	masked_in = REG_RD(dma, np->dma_in_inst, r_masked_intr);
+	
+	if (masked_in.in_eop) {
+		DEBUG(printk("EOP_IN interrupt\n"));
+
+		/* Acknowledge input dma interrupt. */
+		ack_intr.in_eop = 1;
+		REG_WR(dma, np->dma_in_inst, rw_ack_intr, ack_intr);
+
+		np->new_rx_package = 1;
+		/* Check if complete packets were indeed received. */
+		while (np->active_rx_desc->descr.in_eop == 1
+		       && np->new_rx_package) {
+			/*
+			 * Take out the buffer and give it to the OS, then
+			 * allocate a new buffer to put a packet in.
+			 */
+			crisv32_eth_receive_packet(dev);
+			
+			/* Update number of packets received. */
+			np->stats.rx_packets++;
+
+			/* Restarts input dma. */
+			cmd.cont_data = 1;
+			REG_WR(dma, np->dma_in_inst, rw_cmd, cmd);
+
+			/* Acknowledge input dma interrupt. */
+			REG_WR(dma, np->dma_in_inst, rw_ack_intr, ack_intr);
+		}
+	}
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t
+crisv32tx_eth_interrupt(int irq, void *dev_id)
+{
+	reg_dma_rw_stat stat;
+	dma_descr_data *dma_pos;
+	reg_dma_rw_ack_intr ack_intr = { .data = 1 };
+	reg_dma_r_masked_intr masked_out;
+	
+	struct net_device *dev = (struct net_device *) dev_id;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	unsigned long flags;
+	
+	masked_out = REG_RD(dma, np->dma_out_inst, r_masked_intr);
+		
+	/* Get the current output dma position. */
+	stat = REG_RD(dma, np->dma_out_inst, rw_stat);
+	if (stat.list_state == regk_dma_data_at_eol)
+		dma_pos = &np->active_tx_desc->descr;
+	else
+		dma_pos = phys_to_virt(REG_RD_INT(dma, np->dma_out_inst,
+						  rw_data));
+	
+	/* ack the interrupt */
+	REG_WR(dma, np->dma_out_inst, rw_ack_intr, ack_intr);
+	
+	/* protect against ethernet excessive-col interrupts */
+	spin_lock_irqsave(&np->lock, flags);
+
+	/* Take care of transmited dma descriptors and report sent packet. */
+	while (np->txpackets && ((&np->catch_tx_desc->descr != dma_pos)
+				 || netif_queue_stopped(dev))) {
+		/* Update sent packet statistics. */
+		np->stats.tx_bytes += np->catch_tx_desc->skb->len;
+		np->stats.tx_packets++;
+		
+		dev_kfree_skb_irq(np->catch_tx_desc->skb);
+		np->catch_tx_desc->skb = 0;
+		np->txpackets--;
+		np->catch_tx_desc =
+			phys_to_virt((int)np->catch_tx_desc->descr.next);
+#ifdef CONFIG_CRIS_MACH_ARTPEC3
+		if (np->gigabit_mode) {
+		  np->intmem_tx_buf_catch->free = 1;
+		  np->intmem_tx_buf_catch = np->intmem_tx_buf_catch->next;
+		}
+#endif
+		netif_wake_queue(dev);
+	}
+	spin_unlock_irqrestore(&np->lock, flags);
+	return IRQ_HANDLED;
+}
+
+
+/* Update receive errors. */
+static void
+update_rx_stats(struct crisv32_ethernet_local *np)
+{
+	reg_eth_rs_rec_cnt r;
+	reg_eth_rs_phy_cnt rp;
+
+	r = REG_RD(eth, np->eth_inst, rs_rec_cnt);
+	rp = REG_RD(eth, np->eth_inst, rs_phy_cnt);
+
+	np->stats.rx_fifo_errors += r.congestion;
+	np->stats.rx_crc_errors += r.crc_err;
+	np->stats.rx_frame_errors += r.align_err;
+	np->stats.rx_length_errors += r.oversize;
+}
+
+/* Update transmit errors. */
+static void
+update_tx_stats(struct crisv32_ethernet_local *np)
+{
+	reg_eth_rs_tr_cnt r;
+
+	r = REG_RD(eth, np->eth_inst, rs_tr_cnt);
+
+	np->stats.collisions += r.single_col + r.mult_col;
+	np->stats.tx_errors += r.deferred;
+}
+
+/* Get current statistics. */
+static struct net_device_stats *
+crisv32_get_stats(struct net_device *dev)
+{
+	unsigned long flags;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	
+	spin_lock_irqsave(&np->lock, flags);
+
+	update_rx_stats(np);
+	update_tx_stats(np);
+
+	spin_unlock_irqrestore(&np->lock, flags);
+
+	return &np->stats;
+}
+
+/* Check for network errors. This acknowledge the received interrupt. */
+static irqreturn_t
+crisv32nw_eth_interrupt(int irq, void *dev_id)
+{
+	struct net_device *dev = (struct net_device *) dev_id;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	reg_eth_r_masked_intr intr_mask;
+	int ack_intr = 0xffff;
+	reg_eth_rw_clr_err clr_err;
+
+	intr_mask = REG_RD(eth, np->eth_inst, r_masked_intr);
+
+	/*
+	 * Check for underrun and/or excessive collisions. Note that the
+	 * rw_clr_err register clears both underrun and excessive collision
+	 * errors, so there's no need to check them separately.
+	 */
+	if (np->sender_started
+	    && (intr_mask.urun || intr_mask.exc_col)) {
+		unsigned long flags;
+		dma_descr_data *dma_pos;
+		reg_dma_rw_stat stat;
+
+		/* Get the current output dma position. */
+		stat = REG_RD(dma, np->dma_out_inst, rw_stat);
+		if (stat.list_state == regk_dma_data_at_eol)
+			dma_pos = &np->active_tx_desc->descr;
+		else
+			dma_pos = phys_to_virt(REG_RD_INT(dma,
+							  np->dma_out_inst,
+							  rw_data));
+
+		/*
+		 * Protect against the tx-interrupt messing with
+		 * the tx-ring.
+		 */
+		spin_lock_irqsave(&np->lock, flags);
+		/*
+		 * If we have more than one packet in the tx-ring
+		 * drop one and move ahead. Upper layers rely on
+		 * packeloss when doing congestion control.
+		 */
+		if (intr_mask.exc_col && np->txpackets > 1) {
+			dev_kfree_skb_irq(np->catch_tx_desc->skb);
+			np->catch_tx_desc->skb = 0;
+			np->catch_tx_desc = 
+				phys_to_virt((int)
+					     np->catch_tx_desc->descr.next);
+			np->txpackets--;
+			netif_wake_queue(dev);
+		}
+		np->ctxt_out.next = 0;
+		if (np->txpackets) {
+			np->ctxt_out.saved_data = (void *)
+				virt_to_phys(&np->catch_tx_desc->descr);
+			np->ctxt_out.saved_data_buf =
+				np->catch_tx_desc->descr.buf;
+			
+			/* restart the DMA */
+			DMA_START_CONTEXT(np->dma_out_inst,
+					  (int) virt_to_phys(&np->ctxt_out));
+		}
+		else {
+			/* let the next packet restart the DMA */
+			np->ctxt_out.saved_data = (void *)
+				virt_to_phys(&np->active_tx_desc->descr);
+			np->sender_started = 0;
+		}
+		
+		spin_unlock_irqrestore(&np->lock, flags);
+		np->stats.tx_errors++;
+	}
+
+	REG_WR_INT(eth, np->eth_inst, rw_ack_intr, ack_intr);
+	clr_err.clr = 1;
+	REG_WR(eth, np->eth_inst, rw_clr_err, clr_err);
+	
+	update_rx_stats(np);
+	update_tx_stats(np);
+	
+	return IRQ_HANDLED;
+}
+
+/* We have a good packet(s), get it/them out of the buffers. */
+static void
+crisv32_eth_receive_packet(struct net_device *dev)
+{
+	int length;
+	struct sk_buff *skb;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	struct sk_buff *tmp;
+	unsigned long flags;
+
+	DEBUG(printk("crisv32_receive_packet\n"));
+
+	/* Activate LED */
+	spin_lock_irqsave(&np->leds->led_lock, flags);
+	if (!np->leds->led_active && time_after(jiffies, np->leds->led_next_time)) {
+		/* light the network leds depending on the current speed. */
+		crisv32_set_network_leds(LED_ACTIVITY, dev);
+
+		/* Set the earliest time we may clear the LED */
+		np->leds->led_next_time = jiffies + NET_FLASH_TIME;
+		np->leds->led_active = 1;
+		np->leds->clear_led_timer.data = (unsigned long) dev;
+		mod_timer(&np->leds->clear_led_timer, jiffies + HZ/10);
+	}
+	spin_unlock_irqrestore(&np->leds->led_lock, flags);
+
+	/* Discard CRC (4 bytes). */
+	length = (np->active_rx_desc->descr.after) - 
+		(np->active_rx_desc->descr.buf) - 4;
+
+	/* Update received packet statistics. */
+	np->stats.rx_bytes += length;
+
+	if (np->active_rx_desc != np->last_rx_desc) {
+#ifdef CONFIG_CRIS_MACH_ARTPEC3
+		if (np->gigabit_mode) {
+			skb = dev_alloc_skb(length);
+			if(!skb) {
+				np->stats.rx_errors++;
+				printk(KERN_NOTICE "%s: memory squeeze,"
+				       " dropping packet.", dev->name);
+				return;
+			}
+			/* Allocate room for the packet body. */
+			skb_put(skb, length - ETHER_HEAD_LEN);
+			/* Allocate room for the header and copy the data to
+			 * the SKB */
+			memcpy(skb_push(skb, ETHER_HEAD_LEN),
+			       crisv32_intmem_phys_to_virt((unsigned long)np->active_rx_desc->descr.buf), length);
+			skb->dev = dev;
+			skb->protocol = eth_type_trans(skb, dev);
+			skb->ip_summed = CHECKSUM_NONE;
+			/* Send the packet to the upper layer. */
+			netif_rx(skb);
+			np->last_rx_desc =
+				(void *) phys_to_virt(np->last_rx_desc->descr.next);
+		} else {
+#endif
+			tmp = dev_alloc_skb(MAX_MEDIA_DATA_SIZE);
+			if (!tmp) {
+				np->stats.rx_errors++;
+				printk(KERN_NOTICE "%s: memory squeeze,"
+				       " dropping packet.",
+				       dev->name);
+				return;
+			}
+			skb = np->active_rx_desc->skb;
+			np->active_rx_desc->skb = tmp;
+			skb_put(skb, length);
+
+			np->active_rx_desc->descr.buf =
+				(void *) virt_to_phys(np->active_rx_desc->skb->data);
+			np->active_rx_desc->descr.after =
+				np->active_rx_desc->descr.buf + MAX_MEDIA_DATA_SIZE;
+
+			skb->dev = dev;
+			skb->protocol = eth_type_trans(skb, dev);
+			skb->ip_summed = CHECKSUM_NONE;
+
+			/* Send the packet to the upper layer. */
+			netif_rx(skb);
+			np->last_rx_desc =
+				phys_to_virt((int)
+					     np->last_rx_desc->descr.next);
+		}
+#ifdef CONFIG_CRIS_MACH_ARTPEC3
+	}
+#endif
+	/*
+	 * When the input DMA reaches eol precaution must be taken, otherwise
+	 * the DMA could stop. The problem occurs if the eol flag is re-placed
+	 * on the descriptor that the DMA stands on before the DMA proceed to
+	 * the next descriptor. This case could, for example, happen if there
+	 * is a traffic burst and then the network goes silent. To prevent this
+	 * we make sure that we do not set the eol flag on the descriptor that
+	 * the DMA stands on.
+	 */
+	if(virt_to_phys(&np->active_rx_desc->descr) !=
+	   REG_RD_INT(dma, np->dma_in_inst, rw_saved_data)) {
+		np->active_rx_desc->descr.after =
+			np->active_rx_desc->descr.buf + MAX_MEDIA_DATA_SIZE;
+		np->active_rx_desc->descr.eol = 1;
+		np->active_rx_desc->descr.in_eop = 0;
+		np->active_rx_desc =
+			phys_to_virt((int)np->active_rx_desc->descr.next);
+		barrier();
+		np->prev_rx_desc->descr.eol = 0;
+		flush_dma_descr(&np->prev_rx_desc->descr, 0); // Workaround cache bug
+		np->prev_rx_desc =
+			phys_to_virt((int)np->prev_rx_desc->descr.next);
+		flush_dma_descr(&np->prev_rx_desc->descr, 1); // Workaround cache bug
+	} else {
+		np->new_rx_package = 0;
+	}
+}
+
+/* 
+ * This function (i.e. hard_start_xmit) is protected from concurent calls by a
+ * spinlock (xmit_lock) in the net_device structure.
+ */
+static int
+crisv32_eth_send_packet(struct sk_buff *skb, struct net_device *dev)
+{
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	unsigned char *buf = skb->data;
+	unsigned long flags;
+
+	dev->trans_start = jiffies;
+	
+	spin_lock_irqsave(&np->leds->led_lock, flags);
+	if (!np->leds->led_active && time_after(jiffies, np->leds->led_next_time)) {
+		/* light the network leds depending on the current speed. */
+		crisv32_set_network_leds(LED_ACTIVITY, dev);
+
+		/* Set the earliest time we may clear the LED */
+		np->leds->led_next_time = jiffies + NET_FLASH_TIME;
+		np->leds->led_active = 1;
+		np->leds->clear_led_timer.data = (unsigned long) dev;
+		mod_timer(&np->leds->clear_led_timer, jiffies + HZ/10);
+	}
+	spin_unlock_irqrestore(&np->leds->led_lock, flags);
+
+	/*
+	 * Need to disable irq to avoid updating pointer in interrupt while
+	 * sending packets.
+	 */
+	spin_lock_irqsave(&np->lock, flags);
+	
+	np->active_tx_desc->skb = skb;
+#ifdef CONFIG_CRIS_MACH_ARTPEC3
+	if (np->gigabit_mode) {
+		if(np->intmem_tx_buf_active->free) {
+			memcpy(np->intmem_tx_buf_active->buf,
+			       skb->data, skb->len);
+			np->intmem_tx_buf_active->free = 0;
+			crisv32_eth_hw_send_packet(
+				np->intmem_tx_buf_active->buf, skb->len, np);
+			np->intmem_tx_buf_active =
+				np->intmem_tx_buf_active->next;
+		} else {
+			printk("%s: Internal tx memory buffer not free!\n\r",
+			       __FILE__);
+			spin_unlock_irqrestore(&np->lock, flags);
+			return 1;
+		}
+	}
+	else 
+#endif
+	{
+		crisv32_eth_hw_send_packet(buf, skb->len, np);
+	}
+	/* Stop queue if full. */
+	if (np->active_tx_desc == np->catch_tx_desc)
+		netif_stop_queue(dev);
+	
+	np->txpackets++;
+	spin_unlock_irqrestore(&np->lock, flags);
+	
+	return 0;
+}
+
+
+static void
+crisv32_eth_hw_send_packet(unsigned char *buf, int length, void *priv)
+{
+	struct crisv32_ethernet_local *np =
+		(struct crisv32_ethernet_local *) priv;
+
+	/* Configure the tx dma descriptor. */
+#ifdef CONFIG_CRIS_MACH_ARTPEC3
+	if (np->gigabit_mode) {
+	  np->active_tx_desc->descr.buf = (unsigned char *) crisv32_intmem_virt_to_phys(buf);
+	} else 
+#endif
+	{
+	  np->active_tx_desc->descr.buf = (unsigned char *) virt_to_phys(buf);
+	}
+	  
+	np->active_tx_desc->descr.after = np->active_tx_desc->descr.buf +
+		length;
+	np->active_tx_desc->descr.intr = 1;	   
+	np->active_tx_desc->descr.out_eop = 1;
+
+	/* Move eol. */
+	np->active_tx_desc->descr.eol = 1;
+	np->prev_tx_desc->descr.eol = 0;
+
+
+	/* Update pointers. */
+	np->prev_tx_desc = np->active_tx_desc;
+	np->active_tx_desc = phys_to_virt((int)np->active_tx_desc->descr.next);
+
+	/* Start DMA. */
+	crisv32_start_dma_out(np);
+}
+
+static void
+crisv32_start_dma_out(struct crisv32_ethernet_local* np)
+{
+	if (!np->sender_started) {
+		/* Start DMA for the first time. */
+		np->ctxt_out.saved_data_buf = np->prev_tx_desc->descr.buf;
+		REG_WR(dma, np->dma_out_inst, rw_group_down,
+		       (int) virt_to_phys(&np->ctxt_out));
+		DMA_WR_CMD(np->dma_out_inst, regk_dma_load_c);
+		DMA_WR_CMD(np->dma_out_inst, regk_dma_load_d | regk_dma_burst);
+		np->sender_started = 1;
+	} else {
+		DMA_CONTINUE_DATA(np->dma_out_inst);
+	}
+}
+
+/* 
+ * Called by upper layers if they decide it took too long to complete sending
+ * a packet - we need to reset and stuff.
+ */
+static void
+crisv32_eth_tx_timeout(struct net_device *dev)
+{
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	reg_dma_rw_cfg cfg = {0};
+	reg_dma_rw_stat stat = {0};
+	unsigned long flags;
+
+	printk(KERN_WARNING "%s: transmit timed out\n", dev->name);
+
+	
+	spin_lock_irqsave(&np->lock, flags);
+	crisv32_ethernet_bug(dev);
+
+	np->txpackets = 0;
+	/* Update error stats. */
+	np->stats.tx_errors++; 
+
+	/* Reset the TX DMA in case it has hung on something. */
+	cfg.en = 0;
+	REG_WR(dma, np->dma_out_inst, rw_cfg, cfg);
+	
+	do {
+		stat = REG_RD(dma, np->dma_out_inst, rw_stat);
+	} while (stat.mode != regk_dma_rst);
+
+	/* Reset the tranceiver. */
+	crisv32_eth_reset_tranceiver(dev);
+
+	/* Get rid of the packets that never got an interrupt. */
+	do {
+		if (np->catch_tx_desc->skb)
+			dev_kfree_skb(np->catch_tx_desc->skb);
+		
+		np->catch_tx_desc->skb = 0;
+		np->catch_tx_desc =
+			phys_to_virt((int)np->catch_tx_desc->descr.next);
+	} while (np->catch_tx_desc != np->active_tx_desc);
+
+
+	/* Start output DMA. */
+	REG_WR(dma, np->dma_out_inst, rw_group_down,
+	       (int) virt_to_phys(&np->ctxt_out));
+	DMA_WR_CMD(np->dma_out_inst, regk_dma_load_c);
+	DMA_WR_CMD(np->dma_out_inst, regk_dma_load_d | regk_dma_burst);
+	spin_unlock_irqrestore(&np->lock, flags);
+
+	/* Tell the upper layers we're ok again. */
+	netif_wake_queue(dev);
+}
+
+/*
+ * Set or clear the multicast filter for this adaptor.
+ * num_addrs == -1	Promiscuous mode, receive all packets
+ * num_addrs == 0	Normal mode, clear multicast list
+ * num_addrs > 0	Multicast mode, receive normal and MC packets,
+ *			and do best-effort filtering.
+ */
+static void
+crisv32_eth_set_multicast_list(struct net_device *dev)
+{
+	int num_addr = dev->mc_count;
+	unsigned long int lo_bits;
+	unsigned long int hi_bits;
+	reg_eth_rw_rec_ctrl rec_ctrl = {0};
+	reg_eth_rw_ga_lo ga_lo = {0};
+	reg_eth_rw_ga_hi ga_hi = {0};
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+
+	if (dev->flags & IFF_PROMISC) {
+		/* Promiscuous mode. */
+		lo_bits = 0xfffffffful;
+		hi_bits = 0xfffffffful;
+
+		/* Enable individual receive. */
+		rec_ctrl = (reg_eth_rw_rec_ctrl) REG_RD(eth, np->eth_inst,
+							rw_rec_ctrl);
+		rec_ctrl.individual = regk_eth_yes;
+		REG_WR(eth, np->eth_inst, rw_rec_ctrl, rec_ctrl);
+	} else if (dev->flags & IFF_ALLMULTI) {
+		/* Enable all multicasts. */
+		lo_bits = 0xfffffffful;
+		hi_bits = 0xfffffffful;
+
+		/* Disable individual receive */
+		rec_ctrl =
+		  (reg_eth_rw_rec_ctrl) REG_RD(eth, np->eth_inst, rw_rec_ctrl);
+		rec_ctrl.individual = regk_eth_no;
+		REG_WR(eth, np->eth_inst, rw_rec_ctrl, rec_ctrl);
+	} else if (num_addr == 0) {
+		/* Normal, clear the mc list. */
+		lo_bits = 0x00000000ul;
+		hi_bits = 0x00000000ul;
+
+		/* Disable individual receive */
+		rec_ctrl =
+		  (reg_eth_rw_rec_ctrl) REG_RD(eth, np->eth_inst, rw_rec_ctrl);
+		rec_ctrl.individual = regk_eth_no;
+		REG_WR(eth, np->eth_inst, rw_rec_ctrl, rec_ctrl);
+	} else {
+		/* MC mode, receive normal and MC packets. */
+		char hash_ix;
+		struct dev_mc_list *dmi = dev->mc_list;
+		int i;
+		char *baddr;
+		lo_bits = 0x00000000ul;
+		hi_bits = 0x00000000ul;
+		
+		for (i = 0; i < num_addr; i++) {
+			/* Calculate the hash index for the GA registers. */
+			hash_ix = 0;
+			baddr = dmi->dmi_addr;
+			hash_ix ^= (*baddr) & 0x3f;
+			hash_ix ^= ((*baddr) >> 6) & 0x03;
+			++baddr;
+			hash_ix ^= ((*baddr) << 2) & 0x03c;
+			hash_ix ^= ((*baddr) >> 4) & 0xf;
+			++baddr;
+			hash_ix ^= ((*baddr) << 4) & 0x30;
+			hash_ix ^= ((*baddr) >> 2) & 0x3f;
+			++baddr;
+			hash_ix ^= (*baddr) & 0x3f;
+			hash_ix ^= ((*baddr) >> 6) & 0x03;
+			++baddr;
+			hash_ix ^= ((*baddr) << 2) & 0x03c;
+			hash_ix ^= ((*baddr) >> 4) & 0xf;
+			++baddr;
+			hash_ix ^= ((*baddr) << 4) & 0x30;
+			hash_ix ^= ((*baddr) >> 2) & 0x3f;
+
+			hash_ix &= 0x3f;
+
+			if (hash_ix > 32)
+				hi_bits |= (1 << (hash_ix - 32));
+			else
+				lo_bits |= (1 << hash_ix);
+
+			dmi = dmi->next;
+		}
+		
+		/* Disable individual receive. */
+		rec_ctrl =
+		  (reg_eth_rw_rec_ctrl) REG_RD(eth, np->eth_inst, rw_rec_ctrl);
+		rec_ctrl.individual = regk_eth_no;
+		REG_WR(eth, np->eth_inst, rw_rec_ctrl, rec_ctrl);
+	}
+
+	ga_lo.tbl = (unsigned int) lo_bits;
+	ga_hi.tbl = (unsigned int) hi_bits;
+
+	REG_WR(eth, np->eth_inst, rw_ga_lo, ga_lo);
+	REG_WR(eth, np->eth_inst, rw_ga_hi, ga_hi);
+}
+
+static int
+crisv32_eth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+	struct mii_ioctl_data *data = if_mii(ifr);
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	int old_autoneg;
+
+	spin_lock(&np->lock); /* Preempt protection */
+	switch (cmd) {
+		case SIOCGMIIPHY: /* Get PHY address */
+			data->phy_id = np->mdio_phy_addr;
+			break;
+		case SIOCGMIIREG: /* Read MII register */
+			data->val_out = crisv32_eth_get_mdio_reg(dev,
+								 data->reg_num);
+			break;
+		case SIOCSMIIREG: /* Write MII register */
+			crisv32_eth_set_mdio_reg(dev, data->reg_num,
+						 data->val_in);
+			break;
+		case SET_ETH_ENABLE_LEDS:
+			use_network_leds = 1;
+			break;
+		case SET_ETH_DISABLE_LEDS:
+			use_network_leds = 0;
+			break;
+		case SET_ETH_AUTONEG:
+			old_autoneg = autoneg_normal;
+			autoneg_normal = *(int*)data;
+			if (autoneg_normal != old_autoneg)
+				crisv32_eth_negotiate(dev);
+			break;
+	default:
+		spin_unlock(&np->lock); /* Preempt protection */
+		return -EINVAL;
+	}
+	spin_unlock(&np->lock);
+	return 0;
+}
+
+static int crisv32_eth_get_settings(struct net_device *dev,
+			     struct ethtool_cmd *ecmd)
+{
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	/* What about GMII and 1000xpause? not included in ethtool.h */
+	ecmd->supported = SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII |
+			  SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
+			  SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full;
+#ifdef CONFIG_CRIS_MACH_ARTPEC3
+	ecmd->supported |= SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full;
+#endif
+	ecmd->port = PORT_TP;
+	ecmd->transceiver = XCVR_EXTERNAL;
+	ecmd->phy_address = np->mdio_phy_addr;
+	ecmd->speed = np->current_speed;
+	ecmd->duplex = np->full_duplex;
+	ecmd->advertising = ADVERTISED_TP;
+
+	if (np->current_duplex == autoneg && np->current_speed_selection == 0)
+		ecmd->advertising |= ADVERTISED_Autoneg;
+	else {
+		ecmd->advertising |=
+			ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full |
+			ADVERTISED_100baseT_Half | ADVERTISED_100baseT_Full;
+#ifdef CONFIG_CRIS_MACH_ARTPEC3
+		ecmd->advertising |= ADVERTISED_1000baseT_Half |
+			ADVERTISED_1000baseT_Full;
+#endif
+		if (np->current_speed_selection == 10)
+			ecmd->advertising &= ~(ADVERTISED_100baseT_Half |
+					       ADVERTISED_100baseT_Full |
+					       ADVERTISED_1000baseT_Half |
+					       ADVERTISED_1000baseT_Full);
+
+		else if (np->current_speed_selection == 100)
+			ecmd->advertising &= ~(ADVERTISED_10baseT_Half |
+					       ADVERTISED_10baseT_Full |
+					       ADVERTISED_1000baseT_Half |
+					       ADVERTISED_1000baseT_Full);
+
+		else if (np->current_speed_selection == 1000)
+			ecmd->advertising &= ~(ADVERTISED_10baseT_Half |
+					       ADVERTISED_10baseT_Full |
+					       ADVERTISED_100baseT_Half |
+					       ADVERTISED_100baseT_Full);
+
+		if (np->current_duplex == half)
+			ecmd->advertising &= ~(ADVERTISED_10baseT_Full |
+					       ADVERTISED_100baseT_Full |
+					       ADVERTISED_1000baseT_Full);
+		else if (np->current_duplex == full)
+			ecmd->advertising &= ~(ADVERTISED_10baseT_Half |
+					       ADVERTISED_100baseT_Half |
+					       ADVERTISED_1000baseT_Half);
+	}
+
+	ecmd->autoneg = AUTONEG_ENABLE;
+	return 0;
+}
+
+static int crisv32_eth_set_settings(struct net_device *dev,
+			     struct ethtool_cmd *ecmd)
+{
+	if (ecmd->autoneg == AUTONEG_ENABLE) {
+		crisv32_eth_set_duplex(dev, autoneg);
+		crisv32_eth_set_speed(dev, 0);
+	} else {
+		crisv32_eth_set_duplex(dev, ecmd->duplex);
+		crisv32_eth_set_speed(dev, ecmd->speed);
+	}
+
+	return 0;
+}
+
+static void crisv32_eth_get_drvinfo(struct net_device *dev,
+			     struct ethtool_drvinfo *info)
+{
+	strncpy(info->driver, "ETRAX FS", sizeof(info->driver) - 1);
+	strncpy(info->version, "$Revision: 1.96 $", sizeof(info->version) - 1);
+	strncpy(info->fw_version, "N/A", sizeof(info->fw_version) - 1);
+	strncpy(info->bus_info, "N/A", sizeof(info->bus_info) - 1);
+}
+
+static int crisv32_eth_nway_reset(struct net_device *dev)
+{
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+
+	if (np->current_duplex == autoneg && np->current_speed_selection == 0)
+		crisv32_eth_negotiate(dev);
+	return 0;
+}
+
+static struct ethtool_ops crisv32_ethtool_ops = {
+	.get_settings	= crisv32_eth_get_settings,
+	.set_settings	= crisv32_eth_set_settings,
+	.get_drvinfo	= crisv32_eth_get_drvinfo,
+	.nway_reset	= crisv32_eth_nway_reset,
+	.get_link	= ethtool_op_get_link,
+};
+
+/* Is this function really needed? Use ethtool instead? */
+static int
+crisv32_eth_set_config(struct net_device *dev, struct ifmap *map)
+{
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+
+	spin_lock(&np->lock); /* Preempt protection */
+
+	switch(map->port) {
+		case IF_PORT_UNKNOWN:
+			/* Use autoneg */
+			crisv32_eth_set_speed(dev, 0);
+			crisv32_eth_set_duplex(dev, autoneg);
+			break;
+		case IF_PORT_10BASET:
+			crisv32_eth_set_speed(dev, 10);
+			crisv32_eth_set_duplex(dev, autoneg);
+			break;
+		case IF_PORT_100BASET:
+		case IF_PORT_100BASETX:
+			crisv32_eth_set_speed(dev, 100);
+			crisv32_eth_set_duplex(dev, autoneg);
+			break;
+		case IF_PORT_100BASEFX:
+		case IF_PORT_10BASE2:
+		case IF_PORT_AUI:
+			spin_unlock(&np->lock);
+			return -EOPNOTSUPP;
+			break;
+		default:
+			printk(KERN_ERR "%s: Invalid media selected",
+			       dev->name);
+			spin_unlock(&np->lock);
+			return -EINVAL;
+	}
+	spin_unlock(&np->lock);
+	return 0;
+}
+
+#ifdef CONFIG_CRIS_MACH_ARTPEC3
+/* 
+ * Switch the behaviour of the tx and rx buffers using 
+ * external or internal memory. Usage of the internal 
+ * memory is required for gigabit operation.
+ */
+static void 
+crisv32_eth_switch_intmem_usage(struct net_device *dev) 
+{
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+
+	int i;
+	reg_dma_rw_stat stat;
+	reg_dma_rw_cfg cfg = {0};
+	reg_dma_rw_intr_mask intr_mask_in = { .in_eop = regk_dma_yes };
+	reg_dma_rw_ack_intr ack_intr = { .data = 1,.in_eop = 1 };
+	unsigned char *intmem_tmp;
+
+	/* Notify the kernel that the interface has stopped */
+	netif_stop_queue(dev);
+
+	/* Stop the receiver DMA */
+	cfg.en = regk_dma_no;
+	REG_WR(dma, np->dma_in_inst, rw_cfg, cfg);
+
+	if (!(np->gigabit_mode)) {
+		/* deallocate SKBs in rx_desc */
+		for (i = 0; i < NBR_RX_DESC; i++)
+			dev_kfree_skb(np->dma_rx_descr_list[i].skb);
+
+		/* Init TX*/
+		for(i=0; i < NBR_INTMEM_TX_BUF; i++) {
+			/* Allocate internal memory */
+			intmem_tmp = NULL;
+			intmem_tmp = crisv32_intmem_alloc(MAX_MEDIA_DATA_SIZE,
+							  32);
+			/* Check that we really got the memory */
+			if (intmem_tmp == NULL) {
+				printk(KERN_ERR "%s: Can't allocate intmem for"
+				       " RX buffer nbr: %d\n", dev->name, i);
+				return;
+			}
+			/* Setup the list entry */
+			np->tx_intmem_buf_list[i].free = 1;
+			np->tx_intmem_buf_list[i].buf = intmem_tmp;
+			np->tx_intmem_buf_list[i].next = &np->tx_intmem_buf_list[i + 1];
+		}
+		/* Setup the last list entry */
+		np->tx_intmem_buf_list[NBR_INTMEM_TX_BUF - 1].next = &np->tx_intmem_buf_list[0];
+		/* Setup initial pointer */
+		np->intmem_tx_buf_active = np->tx_intmem_buf_list;
+		np->intmem_tx_buf_catch = np->tx_intmem_buf_list;
+
+		/* Init RX */
+		for (i=0; i < NBR_INTMEM_RX_DESC; i++) {
+			/* Allocate internal memory */
+			intmem_tmp = NULL;
+			intmem_tmp = crisv32_intmem_alloc(MAX_MEDIA_DATA_SIZE, 32);
+			/* Check that we really got the memory */
+			if (intmem_tmp == NULL) {
+				printk(KERN_ERR "%s: Can't allocate intmem for"
+				       " desc nbr: %d\n", dev->name, i);
+				return;
+			}
+			/* Setup the descriptors*/
+			np->dma_rx_descr_list[i].skb = NULL;
+			np->dma_rx_descr_list[i].descr.buf = 
+			     (void *) crisv32_intmem_virt_to_phys(intmem_tmp);
+			np->dma_rx_descr_list[i].descr.after =
+			     (void *) crisv32_intmem_virt_to_phys(intmem_tmp + MAX_MEDIA_DATA_SIZE);
+			np->dma_rx_descr_list[i].descr.eol = 0;
+			np->dma_rx_descr_list[i].descr.in_eop = 0;
+			np->dma_rx_descr_list[i].descr.next =
+			     (void *) virt_to_phys(&np->dma_rx_descr_list[i+1].descr);
+		}
+		/* Setup the last rx descriptor */
+		np->dma_rx_descr_list[NBR_INTMEM_RX_DESC - 1].descr.eol = 1;
+		np->dma_rx_descr_list[NBR_INTMEM_RX_DESC - 1].descr.next =
+		   (void*) virt_to_phys(&np->dma_rx_descr_list[0].descr);
+		/* Initialise initial receive pointers. */
+		np->active_rx_desc = &np->dma_rx_descr_list[0];
+		np->prev_rx_desc = &np->dma_rx_descr_list[NBR_INTMEM_RX_DESC - 1];
+		np->last_rx_desc = np->prev_rx_desc;
+
+		np->gigabit_mode = 1;
+	} else {
+		/* dealloc TX intmem */
+		for(i=0; i < NBR_INTMEM_TX_BUF; i++)
+			crisv32_intmem_free(np->tx_intmem_buf_list[i].buf);
+
+		/* dealloc RX intmem */
+		for (i=0; i < NBR_INTMEM_RX_DESC; i++)
+			crisv32_intmem_free(crisv32_intmem_phys_to_virt((unsigned long)np->dma_rx_descr_list[i].descr.buf));
+
+		/* Setup new rx_desc and alloc SKBs */
+		for (i = 0; i < NBR_RX_DESC; i++) {
+			struct sk_buff *skb;
+			
+			skb = dev_alloc_skb(MAX_MEDIA_DATA_SIZE);
+			np->dma_rx_descr_list[i].skb = skb;
+			np->dma_rx_descr_list[i].descr.buf =
+				(char*)virt_to_phys(skb->data);
+			np->dma_rx_descr_list[i].descr.after =
+			   (char*)virt_to_phys(skb->data + MAX_MEDIA_DATA_SIZE);
+
+			np->dma_rx_descr_list[i].descr.eol = 0;
+			np->dma_rx_descr_list[i].descr.in_eop = 0;
+			np->dma_rx_descr_list[i].descr.next =
+			   (void *) virt_to_phys(&np->dma_rx_descr_list[i + 1].descr);
+		}
+    
+		np->dma_rx_descr_list[NBR_RX_DESC - 1].descr.eol = 1;
+		np->dma_rx_descr_list[NBR_RX_DESC - 1].descr.next =
+		   (void *) virt_to_phys(&np->dma_rx_descr_list[0].descr);
+      
+		/* Initialise initial receive pointers. */
+		np->active_rx_desc = &np->dma_rx_descr_list[0];
+		np->prev_rx_desc = &np->dma_rx_descr_list[NBR_RX_DESC - 1];
+		np->last_rx_desc = np->prev_rx_desc;
+
+		np->gigabit_mode = 0;
+	}
+
+	/* Fill context descriptors. */
+	np->ctxt_in.next = 0;	     
+	np->ctxt_in.saved_data =
+	   (dma_descr_data *) virt_to_phys(&np->dma_rx_descr_list[0].descr);
+	np->ctxt_in.saved_data_buf = np->dma_rx_descr_list[0].descr.buf;
+
+	/* Enable irq and make sure that the irqs are cleared. */
+	REG_WR(dma, np->dma_in_inst, rw_intr_mask, intr_mask_in);
+	REG_WR(dma, np->dma_in_inst, rw_ack_intr, ack_intr);
+
+	/* Start input dma */
+	cfg.en = regk_dma_yes;
+	REG_WR(dma, np->dma_in_inst, rw_cfg, cfg);
+	REG_WR(dma, np->dma_in_inst, rw_group_down,
+	       (int) virt_to_phys(&np->ctxt_in));
+
+	DMA_WR_CMD(np->dma_in_inst, regk_dma_load_c);
+	DMA_WR_CMD(np->dma_in_inst, regk_dma_load_d | regk_dma_burst);
+
+	netif_wake_queue(dev);
+
+	stat = REG_RD(dma, np->dma_in_inst, rw_stat);
+}
+#endif
+
+static void
+crisv32_eth_negotiate(struct net_device *dev)
+{
+	unsigned short data =
+	    crisv32_eth_get_mdio_reg(dev, MII_ADVERTISE);
+	unsigned short ctrl1000 =
+	    crisv32_eth_get_mdio_reg(dev, MII_CTRL1000);
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+
+	/* Make all capabilities available */
+	data |= ADVERTISE_10HALF | ADVERTISE_10FULL |
+		ADVERTISE_100HALF | ADVERTISE_100FULL;
+	ctrl1000 |= ADVERTISE_1000HALF | ADVERTISE_1000FULL;
+
+	/* Remove the speed capabilities that we that do not want */
+	switch (np->current_speed_selection) {
+		case 10 :
+			data &= ~(ADVERTISE_100HALF | ADVERTISE_100FULL);
+			ctrl1000 &= ~(ADVERTISE_1000HALF | ADVERTISE_1000FULL);
+			break;
+		case 100 :
+			data &= ~(ADVERTISE_10HALF | ADVERTISE_10FULL);
+			ctrl1000 &= ~(ADVERTISE_1000HALF | ADVERTISE_1000FULL);
+			break;
+		case 1000 :
+			data &= ~(ADVERTISE_10HALF | ADVERTISE_10FULL |
+				  ADVERTISE_100HALF | ADVERTISE_100FULL);
+			break;
+	}
+
+	/* Remove the duplex capabilites that we do not want */
+	if (np->current_duplex == full) {
+		data &= ~(ADVERTISE_10HALF | ADVERTISE_100HALF);
+		ctrl1000 &= ~(ADVERTISE_1000HALF);
+	}
+	else if (np->current_duplex == half) {
+		data &= ~(ADVERTISE_10FULL | ADVERTISE_100FULL);
+		ctrl1000 &= ~(ADVERTISE_1000FULL);
+	}
+
+	crisv32_eth_set_mdio_reg(dev, MII_ADVERTISE, data);
+#ifdef CONFIG_CRIS_MACH_ARTPEC3
+	crisv32_eth_set_mdio_reg(dev, MII_CTRL1000, ctrl1000);
+#endif
+
+	/* Renegotiate with link partner */
+	if (autoneg_normal) {
+	  data = crisv32_eth_get_mdio_reg(dev, MII_BMCR);
+	  data |= BMCR_ANENABLE | BMCR_ANRESTART;
+	}
+	crisv32_eth_set_mdio_reg(dev, MII_BMCR, data);
+}
+static void
+crisv32_eth_check_speed(unsigned long idev)
+{
+	static int led_initiated = 0;
+	struct net_device *dev = (struct net_device *) idev;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+
+	unsigned long data;
+	int old_speed;
+	unsigned long flags;
+	
+	BUG_ON(!np);
+	BUG_ON(!np->transceiver);
+
+	spin_lock(&np->transceiver_lock);
+
+	old_speed = np->current_speed;
+	data = crisv32_eth_get_mdio_reg(dev, MII_BMSR);
+
+	if (!(data & BMSR_LSTATUS))
+		np->current_speed = 0;
+	else
+		np->transceiver->check_speed(dev);
+
+#ifdef CONFIG_CRIS_MACH_ARTPEC3
+	if ((old_speed != np->current_speed)
+	    && ((old_speed == 1000) || (np->current_speed == 1000))) {
+		/* Switch between mii and gmii */
+		reg_eth_rw_gen_ctrl gen_ctrl = REG_RD(eth, np->eth_inst,
+						      rw_gen_ctrl);
+		reg_eth_rw_tr_ctrl tr_ctrl = REG_RD(eth, np->eth_inst,
+						    rw_tr_ctrl);
+		if (old_speed == 1000) {
+			gen_ctrl.phy = regk_eth_mii;
+			gen_ctrl.gtxclk_out = regk_eth_no;
+			tr_ctrl.carrier_ext = regk_eth_no;
+		}
+		else {
+			gen_ctrl.phy = regk_eth_gmii;
+			gen_ctrl.gtxclk_out = regk_eth_yes;
+			tr_ctrl.carrier_ext = regk_eth_yes;
+		}
+		REG_WR(eth, np->eth_inst, rw_tr_ctrl, tr_ctrl);
+		REG_WR(eth, np->eth_inst, rw_gen_ctrl, gen_ctrl);
+
+		crisv32_eth_switch_intmem_usage(dev);
+	}
+#endif
+
+	spin_lock_irqsave(&np->leds->led_lock, flags);
+	if ((old_speed != np->current_speed) || !led_initiated) {
+		led_initiated = 1;
+		np->leds->clear_led_timer.data = (unsigned long) dev;
+		if (np->current_speed) {
+			netif_carrier_on(dev);
+			crisv32_set_network_leds(LED_LINK, dev);
+		} else {
+			netif_carrier_off(dev);
+			crisv32_set_network_leds(LED_NOLINK, dev);
+		}
+	}
+	spin_unlock_irqrestore(&np->leds->led_lock, flags);
+
+	/* Reinitialize the timer. */
+	np->speed_timer.expires = jiffies + NET_LINK_UP_CHECK_INTERVAL;
+	add_timer(&np->speed_timer);
+
+	spin_unlock(&np->transceiver_lock);
+}
+
+static void
+crisv32_eth_set_speed(struct net_device *dev, unsigned long speed)
+{
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	
+	spin_lock(&np->transceiver_lock);
+	if (np->current_speed_selection != speed) {
+		np->current_speed_selection = speed;
+		crisv32_eth_negotiate(dev);
+	}
+	spin_unlock(&np->transceiver_lock);
+}
+
+static void
+crisv32_eth_check_duplex(unsigned long idev)
+{
+	struct net_device *dev = (struct net_device *) idev;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	reg_eth_rw_rec_ctrl rec_ctrl;
+	int old_duplex = np->full_duplex;
+
+	np->transceiver->check_duplex(dev);
+	
+	if (old_duplex != np->full_duplex) {
+		/* Duplex changed. */
+		rec_ctrl = (reg_eth_rw_rec_ctrl) REG_RD(eth, np->eth_inst,
+							rw_rec_ctrl);
+		rec_ctrl.duplex = np->full_duplex;
+		REG_WR(eth, np->eth_inst, rw_rec_ctrl, rec_ctrl);
+	}
+
+	/* Reinitialize the timer. */
+	np->duplex_timer.expires = jiffies + NET_DUPLEX_CHECK_INTERVAL;
+	add_timer(&np->duplex_timer);
+}
+
+static void
+crisv32_eth_set_duplex(struct net_device *dev, enum duplex new_duplex)
+{
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	spin_lock(&np->transceiver_lock);
+	if (np->current_duplex != new_duplex) {
+		np->current_duplex = new_duplex;
+		crisv32_eth_negotiate(dev);
+	}
+	spin_unlock(&np->transceiver_lock);
+}
+
+static int
+crisv32_eth_probe_transceiver(struct net_device *dev)
+{
+	unsigned int phyid_high;
+	unsigned int phyid_low;
+	unsigned int oui;
+	struct transceiver_ops *ops = NULL;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+
+	/* Probe MDIO physical address. */
+	for (np->mdio_phy_addr = 0;
+	     np->mdio_phy_addr <= 31; np->mdio_phy_addr++) {
+		if (crisv32_eth_get_mdio_reg(dev, MII_BMSR) != 0xffff)
+			break;
+	}
+
+	if (np->mdio_phy_addr == 32)
+		return -ENODEV;
+
+	/* Get manufacturer. */
+	phyid_high = crisv32_eth_get_mdio_reg(dev, MII_PHYSID1);
+	phyid_low = crisv32_eth_get_mdio_reg(dev, MII_PHYSID2);
+	
+	oui = (phyid_high << 6) | (phyid_low >> 10);
+
+	for (ops = &transceivers[0]; ops->oui; ops++) {
+		if (ops->oui == oui)
+			break;
+	}
+
+	np->transceiver = ops;
+	return 0;
+}
+
+static void
+generic_check_speed(struct net_device *dev)
+{
+	unsigned long data;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+
+	data = crisv32_eth_get_mdio_reg(dev, MII_ADVERTISE);
+	if ((data & ADVERTISE_100FULL) ||
+	    (data & ADVERTISE_100HALF))
+		np->current_speed = 100;
+	else
+		np->current_speed = 10;	
+}
+
+static void
+generic_check_duplex(struct net_device *dev)
+{
+	unsigned long data;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	
+	data = crisv32_eth_get_mdio_reg(dev, MII_ADVERTISE);
+	if ((data & ADVERTISE_10FULL) ||
+	    (data & ADVERTISE_100FULL))
+		np->full_duplex = 1;
+	else
+		np->full_duplex = 0;
+}
+
+static void
+broadcom_check_speed(struct net_device *dev)
+{
+	unsigned long data;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+
+	data = crisv32_eth_get_mdio_reg(dev, MDIO_AUX_CTRL_STATUS_REG);
+	np->current_speed = (data & MDIO_BC_SPEED ? 100 : 10);
+}
+
+static void
+broadcom_check_duplex(struct net_device *dev)
+{
+	unsigned long data;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+
+	data = crisv32_eth_get_mdio_reg(dev, MDIO_AUX_CTRL_STATUS_REG);	       
+	np->full_duplex = (data & MDIO_BC_FULL_DUPLEX_IND) ? 1 : 0;
+}
+
+static void
+tdk_check_speed(struct net_device *dev)
+{
+	unsigned long data;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	
+	data = crisv32_eth_get_mdio_reg(dev, MDIO_TDK_DIAGNOSTIC_REG);
+	np->current_speed = (data & MDIO_TDK_DIAGNOSTIC_RATE ? 100 : 10);
+}
+
+static void
+tdk_check_duplex(struct net_device *dev)
+{
+	unsigned long data;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+
+	data = crisv32_eth_get_mdio_reg(dev, MDIO_TDK_DIAGNOSTIC_REG);
+	np->full_duplex = (data & MDIO_TDK_DIAGNOSTIC_DPLX) ? 1 : 0;
+
+}
+
+static void
+intel_check_speed(struct net_device *dev)
+{
+	unsigned long data;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	data = crisv32_eth_get_mdio_reg(dev, MDIO_INT_STATUS_REG_2);
+	np->current_speed = (data & MDIO_INT_SPEED ? 100 : 10);
+}
+
+static void
+intel_check_duplex(struct net_device *dev)
+{
+	unsigned long data;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	
+	data = crisv32_eth_get_mdio_reg(dev, MDIO_INT_STATUS_REG_2);	    
+	np->full_duplex = (data & MDIO_INT_FULL_DUPLEX_IND) ? 1 : 0;
+}
+
+static void
+national_check_speed(struct net_device *dev)
+{
+	unsigned long data;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+
+	data = crisv32_eth_get_mdio_reg(dev, MDIO_NAT_LINK_AN_REG);
+	if (data & MDIO_NAT_1000)
+		np->current_speed = 1000;
+	else if (data & MDIO_NAT_100)
+		np->current_speed = 100;
+	else
+		np->current_speed = 10;	
+}
+
+static void
+national_check_duplex(struct net_device *dev)
+{
+	unsigned long data;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	
+	data = crisv32_eth_get_mdio_reg(dev, MDIO_NAT_LINK_AN_REG);
+	if (data & MDIO_NAT_FULL_DUPLEX_IND)
+		np->full_duplex = 1;
+	else
+		np->full_duplex = 0;
+}
+
+static void
+crisv32_eth_reset_tranceiver(struct net_device *dev)
+{
+	int i;
+	unsigned short cmd;
+	unsigned short data;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+
+	data = crisv32_eth_get_mdio_reg(dev, MII_BMCR);
+
+	cmd = (MDIO_START << 14)
+		| (MDIO_WRITE << 12)
+		| (np->mdio_phy_addr << 7)
+		| (MII_BMCR << 2);
+
+	crisv32_eth_send_mdio_cmd(dev, cmd, 1);
+
+	data |= 0x8000;
+
+	/* Magic value is number of bits. */
+	for (i = 15; i >= 0; i--)
+		crisv32_eth_send_mdio_bit(dev, GET_BIT(i, data));
+}
+
+static unsigned short
+crisv32_eth_get_mdio_reg(struct net_device *dev, unsigned char reg_num)
+{
+	int i;
+	unsigned short cmd;	/* Data to be sent on MDIO port. */
+	unsigned short data;	/* Data read from MDIO. */
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+
+	/* Start of frame, OP Code, Physical Address, Register Address. */
+	cmd = (MDIO_START << 14)
+		| (MDIO_READ << 12)
+		| (np->mdio_phy_addr << 7)
+		| (reg_num << 2);
+
+	crisv32_eth_send_mdio_cmd(dev, cmd, 0);
+
+	data = 0;
+
+	/* Receive data. Magic value is number of bits. */
+	for (i = 15; i >= 0; i--)
+		data |= (crisv32_eth_receive_mdio_bit(dev) << i);
+
+	return data;
+}
+
+static void
+crisv32_eth_set_mdio_reg(struct net_device *dev, unsigned char reg, int value)
+{
+	int bitCounter;
+	unsigned short cmd;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+
+	cmd = (MDIO_START << 14)
+		| (MDIO_WRITE << 12)
+		| (np->mdio_phy_addr << 7)
+		| (reg << 2);
+	
+	crisv32_eth_send_mdio_cmd(dev, cmd, 1);
+
+	/* Data... */
+	for (bitCounter=15; bitCounter>=0 ; bitCounter--) {
+		crisv32_eth_send_mdio_bit(dev, GET_BIT(bitCounter, value));
+	}
+}
+
+static void
+crisv32_eth_send_mdio_cmd(struct net_device *dev, unsigned short cmd,
+			  int write_cmd)
+{
+	int i;
+	unsigned char data = 0x2;
+
+	/* Preamble. Magic value is number of bits. */
+	for (i = 31; i >= 0; i--)
+		crisv32_eth_send_mdio_bit(dev, GET_BIT(i, MDIO_PREAMBLE));
+
+	for (i = 15; i >= 2; i--)
+		crisv32_eth_send_mdio_bit(dev, GET_BIT(i, cmd));
+
+	/* Turnaround. */
+	for (i = 1; i >= 0; i--)
+		if (write_cmd)
+			crisv32_eth_send_mdio_bit(dev, GET_BIT(i, data));
+		else
+			crisv32_eth_receive_mdio_bit(dev);
+}
+
+static void
+crisv32_eth_send_mdio_bit(struct net_device *dev, unsigned char bit)
+{
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	
+	reg_eth_rw_mgm_ctrl mgm_ctrl = {
+		.mdoe = regk_eth_yes,
+		.mdio = bit & 1
+	};
+
+	REG_WR(eth, np->eth_inst, rw_mgm_ctrl, mgm_ctrl);
+
+	udelay(1);
+
+	mgm_ctrl.mdc = 1;
+	REG_WR(eth, np->eth_inst, rw_mgm_ctrl, mgm_ctrl);
+
+	udelay(1);
+}
+
+static unsigned char
+crisv32_eth_receive_mdio_bit(struct net_device *dev)
+{
+	reg_eth_r_stat stat;
+	reg_eth_rw_mgm_ctrl mgm_ctrl = {0};
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+
+	REG_WR(eth, np->eth_inst, rw_mgm_ctrl, mgm_ctrl);
+	stat = REG_RD(eth, np->eth_inst, r_stat);
+
+	udelay(1);
+
+	mgm_ctrl.mdc = 1;
+	REG_WR(eth, np->eth_inst, rw_mgm_ctrl, mgm_ctrl);
+
+	udelay(1);
+	return stat.mdio;
+}
+
+static void
+crisv32_clear_network_leds(unsigned long priv)
+{
+	struct net_device *dev = (struct net_device*)priv;
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	unsigned long flags;
+
+	spin_lock_irqsave(&np->leds->led_lock, flags);
+	if (np->leds->led_active && time_after(jiffies, np->leds->led_next_time)) {
+		crisv32_set_network_leds(LED_NOACTIVITY, dev);
+
+		/* Set the earliest time we may set the LED */
+		np->leds->led_next_time = jiffies + NET_FLASH_PAUSE;
+		np->leds->led_active = 0;
+	}
+	spin_unlock_irqrestore(&np->leds->led_lock, flags);
+}
+
+static void
+crisv32_set_network_leds(int active, struct net_device *dev)
+{
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	int light_leds = 0;
+
+	if (np->leds->ledgrp == LED_GRP_NONE)
+	  return;
+
+	if (active == LED_NOLINK) {
+		if (dev == crisv32_dev[0])
+			np->leds->ifisup[0] = 0;
+		else
+			np->leds->ifisup[1] = 0;
+	}
+	else if (active == LED_LINK) {
+		if (dev == crisv32_dev[0])
+			np->leds->ifisup[0] = 1;
+		else
+			np->leds->ifisup[1] = 1;
+#if defined(CONFIG_ETRAX_NETWORK_LED_ON_WHEN_LINK) 
+		light_leds = 1;
+	} else {
+		light_leds = (active == LED_NOACTIVITY);
+#elif defined(CONFIG_ETRAX_NETWORK_LED_ON_WHEN_ACTIVITY)
+		light_leds = 0;
+	} else {
+		light_leds = (active == LED_ACTIVITY);
+#else
+#error "Define either CONFIG_ETRAX_NETWORK_LED_ON_WHEN_LINK or CONFIG_ETRAX_NETWORK_LED_ON_WHEN_ACTIVITY"
+#endif 
+	}
+
+	if (!use_network_leds) {
+		NET_LED_SET(np->leds->ledgrp,LED_OFF);
+		return;
+	}
+
+	if (!np->current_speed) {
+		/* Set link down if none of the interfaces that use this led group is up */
+		if ((np->leds->ifisup[0] + np->leds->ifisup[1]) == 0) {
+#if defined(CONFIG_ETRAX_NETWORK_RED_ON_NO_CONNECTION)
+			/* Make LED red, link is down */
+			NET_LED_SET(np->leds->ledgrp,LED_RED);
+#else
+			NET_LED_SET(np->leds->ledgrp,LED_OFF);
+#endif	
+		}
+	}
+	else if (light_leds) {
+		if (np->current_speed == 10) {
+			NET_LED_SET(np->leds->ledgrp,LED_ORANGE);
+		} else {
+			NET_LED_SET(np->leds->ledgrp,LED_GREEN);
+		}
+	}
+	else {
+		NET_LED_SET(np->leds->ledgrp,LED_OFF);
+	}
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void
+crisv32_netpoll(struct net_device* netdev)
+{
+	crisv32rx_eth_interrupt(DMA0_INTR_VECT, netdev, NULL);
+}
+#endif
+
+#ifdef CONFIG_CPU_FREQ
+static int
+crisv32_ethernet_freq_notifier(struct notifier_block *nb,
+			       unsigned long val, void *data)
+{
+	struct cpufreq_freqs *freqs = data;
+	if (val == CPUFREQ_POSTCHANGE) {
+		int i;
+		for (i = 0; i < 2; i++) {
+			struct net_device* dev = crisv32_dev[i];
+			unsigned short data;
+			if (dev == NULL)
+				continue;
+
+			data = crisv32_eth_get_mdio_reg(dev, MII_BMCR);
+			if (freqs->new == 200000)
+				data &= ~BMCR_PDOWN;
+			else
+				data |= BMCR_PDOWN;
+			crisv32_eth_set_mdio_reg(dev, MII_BMCR, data);
+		}
+	}
+	return 0;
+}
+#endif
+
+/*
+ * Must be called with the np->lock held.
+ */
+static void crisv32_ethernet_bug(struct net_device *dev)
+{
+	struct crisv32_ethernet_local *np = netdev_priv(dev);
+	dma_descr_data *dma_pos;
+	dma_descr_data *in_dma_pos;
+	reg_dma_rw_stat stat = {0};
+	reg_dma_rw_stat in_stat = {0};
+	int i;
+		
+	/* Get the current output dma position. */
+	stat = REG_RD(dma, np->dma_out_inst, rw_stat);
+	dma_pos = phys_to_virt(REG_RD_INT(dma, np->dma_out_inst, rw_data));
+	in_stat = REG_RD(dma, np->dma_in_inst, rw_stat);
+	in_dma_pos = phys_to_virt(REG_RD_INT(dma, np->dma_in_inst, rw_data));
+	
+	printk("%s:\n"
+	       "stat.list_state=%x\n"
+	       "stat.mode=%x\n"
+	       "stat.stream_cmd_src=%x\n"
+	       "dma_pos=%x\n"
+	       "in_stat.list_state=%x\n"
+	       "in_stat.mode=%x\n"
+	       "in_stat.stream_cmd_src=%x\n"
+	       "in_dma_pos=%x\n"
+	       "catch=%x active=%x\n"
+	       "packets=%d queue=%d\n"
+	       "intr_vect.r_vect=%x\n"
+	       "dma.r_masked_intr=%x dma.rw_ack_intr=%x "
+	       "dma.r_intr=%x dma.rw_intr_masked=%x\n"
+	       "eth.r_stat=%x\n",
+	       __func__,
+	       stat.list_state, stat.mode, stat.stream_cmd_src,
+	       (unsigned int)dma_pos,
+	       in_stat.list_state, in_stat.mode, in_stat.stream_cmd_src,
+	       (unsigned int)in_dma_pos,
+	       (unsigned int)&np->catch_tx_desc->descr,
+	       (unsigned int)&np->active_tx_desc->descr,
+	       np->txpackets,
+	       netif_queue_stopped(dev),
+	       REG_RD_INT(intr_vect, regi_irq, r_vect),
+	       REG_RD_INT(dma, np->dma_out_inst, r_masked_intr),
+	       REG_RD_INT(dma, np->dma_out_inst, rw_ack_intr),
+	       REG_RD_INT(dma, np->dma_out_inst, r_intr),
+	       REG_RD_INT(dma, np->dma_out_inst, rw_intr_mask),
+	       REG_RD_INT(eth, np->eth_inst, r_stat));
+
+	printk("tx-descriptors:\n");
+	for (i = 0; i < NBR_TX_DESC; i++) {
+		printk("txdesc[%d]=0x%x\n", i, (unsigned int)
+		       virt_to_phys(&np->dma_tx_descr_list[i].descr));
+		printk("txdesc[%d].skb=0x%x\n", i,
+		       (unsigned int)np->dma_tx_descr_list[i].skb);
+		printk("txdesc[%d].buf=0x%x\n", i,
+		       (unsigned int)np->dma_tx_descr_list[i].descr.buf);
+		printk("txdesc[%d].after=0x%x\n", i,
+		       (unsigned int)np->dma_tx_descr_list[i].descr.after);
+		printk("txdesc[%d].intr=%x\n", i,
+		       np->dma_tx_descr_list[i].descr.intr);
+		printk("txdesc[%d].eol=%x\n", i,
+		       np->dma_tx_descr_list[i].descr.eol);
+		printk("txdesc[%d].out_eop=%x\n", i,
+		       np->dma_tx_descr_list[i].descr.out_eop);
+		printk("txdesc[%d].wait=%x\n", i,
+		       np->dma_tx_descr_list[i].descr.wait);
+	}
+}
+
+
+static int
+crisv32_init_module(void)
+{
+	return crisv32_ethernet_init();
+}
+
+module_init(crisv32_init_module);
diff -urN linux-2.6.19.2.orig/drivers/net/cris/eth_v32.h linux-2.6.19.2.dev/drivers/net/cris/eth_v32.h
--- linux-2.6.19.2.orig/drivers/net/cris/eth_v32.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.19.2.dev/drivers/net/cris/eth_v32.h	2007-02-06 11:10:37.000000000 +0100
@@ -0,0 +1,248 @@
+/*
+ * Definitions for ETRAX FS ethernet driver.
+ *
+ * Copyright (C) 2003, 2004, 2005 Axis Communications.
+ */
+
+#ifndef _ETRAX_ETHERNET_H_
+#define _ETRAX_ETHERNET_H_
+
+#include <asm/arch/hwregs/dma.h>
+
+
+#define MAX_MEDIA_DATA_SIZE 1522	/* Max packet size. */
+
+#define NBR_RX_DESC 64			/* Number of RX descriptors. */
+#define NBR_TX_DESC 16			/* Number of TX descriptors. */
+#ifdef CONFIG_CRIS_MACH_ARTPEC3
+#define NBR_INTMEM_RX_DESC 5		/* Number of RX descriptors in int. mem.
+					 * when running in gigabit mode.
+					 * Should be less then NBR_RX_DESC 
+					 */
+#define NBR_INTMEM_TX_BUF 4		/* Number of TX buffers in int. mem
+					 * when running in gigabit mode.
+					 * Should be less than NBR_TX_DESC
+					 */
+#endif
+
+/* Large packets are sent directly to upper layers while small packets
+ * are copied (to reduce memory waste).  The following constant
+ * decides the breakpoint.
+ */
+#define RX_COPYBREAK        (256)
+
+#define ETHER_HEAD_LEN      (14)
+
+/* 
+** MDIO constants.
+*/
+#define MDIO_START                          0x1
+#define MDIO_READ                           0x2
+#define MDIO_WRITE                          0x1
+#define MDIO_PREAMBLE              0xfffffffful
+
+/* Broadcom specific */
+#define MDIO_AUX_CTRL_STATUS_REG           0x18
+#define MDIO_BC_FULL_DUPLEX_IND             0x1
+#define MDIO_BC_SPEED                       0x2
+
+/* TDK specific */
+#define MDIO_TDK_DIAGNOSTIC_REG              18
+#define MDIO_TDK_DIAGNOSTIC_RATE          0x400
+#define MDIO_TDK_DIAGNOSTIC_DPLX          0x800
+
+/*Intel LXT972A specific*/
+#define MDIO_INT_STATUS_REG_2		   0x0011
+#define MDIO_INT_FULL_DUPLEX_IND ( 0x0001 << 9  )
+#define MDIO_INT_SPEED		 ( 0x0001 << 14 )
+
+/*National Semiconductor DP83865 specific*/
+#define MDIO_NAT_LINK_AN_REG              0x11
+#define MDIO_NAT_1000            (0x0001 << 4)
+#define MDIO_NAT_100             (0x0001 << 3)
+#define MDIO_NAT_FULL_DUPLEX_IND (0x0001 << 1)
+
+/* Network flash constants */
+#define NET_FLASH_TIME                  (HZ/50) /* 20 ms */
+#define NET_FLASH_PAUSE                 (HZ/100) /* 10 ms */
+#define NET_LINK_UP_CHECK_INTERVAL	(2*HZ)	/* 2 seconds. */
+#define NET_DUPLEX_CHECK_INTERVAL	(2*HZ)	/* 2 seconds. */
+
+/* Duplex settings. */
+enum duplex {
+	half,
+	full,
+	autoneg
+};
+
+/* Some transceivers requires special handling. */
+struct transceiver_ops {
+	unsigned int oui;
+	void (*check_speed) (struct net_device * dev);
+	void (*check_duplex) (struct net_device * dev);
+};
+
+typedef struct crisv32_eth_descr {
+	dma_descr_data descr __attribute__ ((__aligned__(32)));
+	struct sk_buff *skb;
+	unsigned char *linearized_packet;
+} crisv32_eth_descr;
+
+
+
+#ifdef CONFIG_CRIS_MACH_ARTPEC3
+struct tx_buffer_list {
+  struct tx_buffer_list *next;
+  unsigned char *buf;
+  char free;
+};
+#endif
+
+/* LED stuff */
+#define LED_GRP_0 0
+#define LED_GRP_1 1
+#define LED_GRP_NONE 2
+
+#define LED_ACTIVITY   0
+#define LED_NOACTIVITY 1
+#define LED_LINK       2
+#define LED_NOLINK     3
+
+struct crisv32_eth_leds {
+	unsigned int ledgrp;
+	int led_active;
+	unsigned long led_next_time;
+	struct timer_list clear_led_timer;
+	spinlock_t led_lock; /* Protect LED state */
+	int ifisup[2];
+};
+
+#define NET_LED_SET(x,y)				\
+	do {						\
+		if (x == 0) LED_NETWORK_GRP0_SET(y);	\
+		if (x == 1) LED_NETWORK_GRP1_SET(y);	\
+	} while (0)
+
+/* Information that need to be kept for each device. */
+struct crisv32_ethernet_local {
+	dma_descr_context ctxt_in __attribute__ ((__aligned__(32)));
+	dma_descr_context ctxt_out __attribute__ ((__aligned__(32)));
+
+	crisv32_eth_descr *active_rx_desc;
+	crisv32_eth_descr *prev_rx_desc;
+	crisv32_eth_descr *last_rx_desc;
+
+	crisv32_eth_descr *active_tx_desc;
+	crisv32_eth_descr *prev_tx_desc;
+	crisv32_eth_descr *catch_tx_desc;
+
+	crisv32_eth_descr dma_rx_descr_list[NBR_RX_DESC];
+	crisv32_eth_descr dma_tx_descr_list[NBR_TX_DESC];
+#ifdef CONFIG_CRIS_MACH_ARTPEC3
+	struct tx_buffer_list tx_intmem_buf_list[NBR_INTMEM_TX_BUF];
+	struct tx_buffer_list *intmem_tx_buf_active;
+	struct tx_buffer_list *intmem_tx_buf_catch;
+	char gigabit_mode;
+#endif
+	char new_rx_package;
+
+	/* DMA and ethernet registers for the device. */
+	int eth_inst;
+	int dma_in_inst;
+	int dma_out_inst;
+
+	/* Network speed indication. */
+	struct timer_list speed_timer;
+	int current_speed;		/* Speed read from tranceiver */
+	int current_speed_selection;	/* Speed selected by user */
+	int sender_started;
+	int txpackets;
+
+	struct crisv32_eth_leds *leds;
+
+	/* Duplex. */
+	struct timer_list duplex_timer;
+	int full_duplex;
+	enum duplex current_duplex;
+
+	struct net_device_stats stats;
+
+	/* Transciever address. */
+	unsigned int mdio_phy_addr;
+
+	struct transceiver_ops *transceiver;
+
+	/* 
+	 * TX control lock. This protects the transmit buffer ring state along
+	 * with the "tx full" state of the driver.  This means all netif_queue
+	 * flow control actions are protected by this lock as well.
+	 */
+	spinlock_t lock;
+	spinlock_t transceiver_lock; /* Protect transceiver state. */
+};
+
+/* Function prototypes. */
+static int crisv32_ethernet_init(void);
+static int crisv32_ethernet_device_init(struct net_device* dev);
+static int crisv32_eth_open(struct net_device *dev);
+static int crisv32_eth_close(struct net_device *dev);
+static int crisv32_eth_set_mac_address(struct net_device *dev, void *vpntr);
+static irqreturn_t crisv32rx_eth_interrupt(int irq, void *dev_id);
+static irqreturn_t crisv32tx_eth_interrupt(int irq, void *dev_id);
+static irqreturn_t crisv32nw_eth_interrupt(int irq, void *dev_id);
+static void crisv32_eth_receive_packet(struct net_device *dev);
+static int crisv32_eth_send_packet(struct sk_buff *skb, struct net_device *dev);
+static void crisv32_eth_hw_send_packet(unsigned char *buf, int length,
+				       void *priv);
+static void crisv32_eth_tx_timeout(struct net_device *dev);
+static void crisv32_eth_set_multicast_list(struct net_device *dev);
+static int crisv32_eth_ioctl(struct net_device *dev, struct ifreq *ifr,
+			     int cmd);
+static int crisv32_eth_set_config(struct net_device* dev, struct ifmap* map);
+#ifdef CONFIG_CRIS_MACH_ARTPEC3
+static void crisv32_eth_switch_intmem_usage(struct net_device *dev);
+#endif
+static void crisv32_eth_negotiate(struct net_device *dev);
+static void crisv32_eth_check_speed(unsigned long idev);
+static void crisv32_eth_set_speed(struct net_device *dev, unsigned long speed);
+static void crisv32_eth_check_duplex(unsigned long idev);
+static void crisv32_eth_set_duplex(struct net_device *dev, enum duplex);
+static int crisv32_eth_probe_transceiver(struct net_device *dev);
+
+static struct ethtool_ops crisv32_ethtool_ops;
+
+static void generic_check_speed(struct net_device *dev);
+static void generic_check_duplex(struct net_device *dev);
+static void broadcom_check_speed(struct net_device *dev);
+static void broadcom_check_duplex(struct net_device *dev);
+static void tdk_check_speed(struct net_device *dev);
+static void tdk_check_duplex(struct net_device *dev);
+static void intel_check_speed(struct net_device* dev);
+static void intel_check_duplex(struct net_device *dev);
+static void national_check_speed(struct net_device* dev);
+static void national_check_duplex(struct net_device *dev);
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void crisv32_netpoll(struct net_device* dev);
+#endif
+
+static void crisv32_clear_network_leds(unsigned long dummy);
+static void crisv32_set_network_leds(int active, struct net_device* dev);
+
+static void crisv32_eth_reset_tranceiver(struct net_device *dev);
+static unsigned short crisv32_eth_get_mdio_reg(struct net_device *dev,
+					       unsigned char reg_num);
+static void crisv32_eth_set_mdio_reg(struct net_device *dev,
+                                     unsigned char reg_num,
+                                     int val);
+static void crisv32_eth_send_mdio_cmd(struct net_device *dev,
+				      unsigned short cmd, int write_cmd);
+static void crisv32_eth_send_mdio_bit(struct net_device *dev,
+				      unsigned char bit);
+static unsigned char crisv32_eth_receive_mdio_bit(struct net_device *dev);
+
+static struct net_device_stats *crisv32_get_stats(struct net_device *dev);
+static void crisv32_start_dma_out(struct crisv32_ethernet_local* np);
+
+
+#endif /* _ETRAX_ETHERNET_H_ */