diff options
| author | claudio <claudio@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2009-04-09 16:18:45 +0000 |
|---|---|---|
| committer | claudio <claudio@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2009-04-09 16:18:45 +0000 |
| commit | 409fb7adfc2c6de59b2e05311169eb19fd62093d (patch) | |
| tree | 1c7d1b3c3379effbd4318114340fad01fb277f5c /target/linux/etrax/files/drivers/usb/host | |
| parent | 43e3feff80d764f2805bcb49d31971c050016fa9 (diff) | |
move etrax generic files to specific kernel version
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15173 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/etrax/files/drivers/usb/host')
| -rw-r--r-- | target/linux/etrax/files/drivers/usb/host/hc-cris-dbg.h | 141 | ||||
| -rw-r--r-- | target/linux/etrax/files/drivers/usb/host/hc-crisv10.c | 4985 | ||||
| -rw-r--r-- | target/linux/etrax/files/drivers/usb/host/hc-crisv10.h | 333 |
3 files changed, 0 insertions, 5459 deletions
diff --git a/target/linux/etrax/files/drivers/usb/host/hc-cris-dbg.h b/target/linux/etrax/files/drivers/usb/host/hc-cris-dbg.h deleted file mode 100644 index f53f5581b1..0000000000 --- a/target/linux/etrax/files/drivers/usb/host/hc-cris-dbg.h +++ /dev/null @@ -1,141 +0,0 @@ - -/* macros for debug output */ - -#define hcd_dbg(hcd, fmt, args...) \ - dev_info(hcd->self.controller, fmt, ## args) -#define hcd_err(hcd, fmt, args...) \ - dev_err(hcd->self.controller, fmt, ## args) -#define hcd_info(hcd, fmt, args...) \ - dev_info(hcd->self.controller, fmt, ## args) -#define hcd_warn(hcd, fmt, args...) \ - dev_warn(hcd->self.controller, fmt, ## args) - -/* -#define devdrv_dbg(fmt, args...) \ - printk(KERN_INFO "usb_devdrv dbg: ");printk(fmt, ## args) -*/ -#define devdrv_dbg(fmt, args...) {} - -#define devdrv_err(fmt, args...) \ - printk(KERN_ERR "usb_devdrv error: ");printk(fmt, ## args) -#define devdrv_info(fmt, args...) \ - printk(KERN_INFO "usb_devdrv: ");printk(fmt, ## args) - -#define irq_dbg(fmt, args...) \ - printk(KERN_INFO "crisv10_irq dbg: ");printk(fmt, ## args) -#define irq_err(fmt, args...) \ - printk(KERN_ERR "crisv10_irq error: ");printk(fmt, ## args) -#define irq_warn(fmt, args...) \ - printk(KERN_INFO "crisv10_irq warn: ");printk(fmt, ## args) -#define irq_info(fmt, args...) \ - printk(KERN_INFO "crisv10_hcd: ");printk(fmt, ## args) - -/* -#define rh_dbg(fmt, args...) \ - printk(KERN_DEBUG "crisv10_rh dbg: ");printk(fmt, ## args) -*/ -#define rh_dbg(fmt, args...) {} - -#define rh_err(fmt, args...) \ - printk(KERN_ERR "crisv10_rh error: ");printk(fmt, ## args) -#define rh_warn(fmt, args...) \ - printk(KERN_INFO "crisv10_rh warning: ");printk(fmt, ## args) -#define rh_info(fmt, args...) \ - printk(KERN_INFO "crisv10_rh: ");printk(fmt, ## args) - -/* -#define tc_dbg(fmt, args...) \ - printk(KERN_INFO "crisv10_tc dbg: ");printk(fmt, ## args) -*/ -#define tc_dbg(fmt, args...) {while(0){}} - -#define tc_err(fmt, args...) \ - printk(KERN_ERR "crisv10_tc error: ");printk(fmt, ## args) -/* -#define tc_warn(fmt, args...) \ - printk(KERN_INFO "crisv10_tc warning: ");printk(fmt, ## args) -*/ -#define tc_warn(fmt, args...) {while(0){}} - -#define tc_info(fmt, args...) \ - printk(KERN_INFO "crisv10_tc: ");printk(fmt, ## args) - - -/* Debug print-outs for various traffic types */ - -#define intr_warn(fmt, args...) \ - printk(KERN_INFO "crisv10_intr warning: ");printk(fmt, ## args) -/* -#define intr_dbg(fmt, args...) \ - printk(KERN_DEBUG "crisv10_intr dbg: ");printk(fmt, ## args) -*/ -#define intr_dbg(fmt, args...) {while(0){}} - - -#define isoc_err(fmt, args...) \ - printk(KERN_ERR "crisv10_isoc error: ");printk(fmt, ## args) -/* -#define isoc_warn(fmt, args...) \ - printk(KERN_INFO "crisv10_isoc warning: ");printk(fmt, ## args) -*/ -#define isoc_warn(fmt, args...) {while(0){}} - -/* -#define isoc_dbg(fmt, args...) \ - printk(KERN_INFO "crisv10_isoc dbg: ");printk(fmt, ## args) -*/ -#define isoc_dbg(fmt, args...) {while(0){}} - -/* -#define timer_warn(fmt, args...) \ - printk(KERN_INFO "crisv10_timer warning: ");printk(fmt, ## args) -*/ -#define timer_warn(fmt, args...) {while(0){}} - -/* -#define timer_dbg(fmt, args...) \ - printk(KERN_INFO "crisv10_timer dbg: ");printk(fmt, ## args) -*/ -#define timer_dbg(fmt, args...) {while(0){}} - - -/* Debug printouts for events related to late finishing of URBs */ -/* -#define late_dbg(fmt, args...) \ - printk(KERN_INFO "crisv10_late dbg: ");printk(fmt, ## args) -*/ -#define late_dbg(fmt, args...) {while(0){}} - -#define late_warn(fmt, args...) \ - printk(KERN_INFO "crisv10_late warning: ");printk(fmt, ## args) -/* -#define errno_dbg(fmt, args...) \ - printk(KERN_INFO "crisv10_errno dbg: ");printk(fmt, ## args) -*/ -#define errno_dbg(fmt, args...) {while(0){}} - - -#define dma_dbg(fmt, args...) \ - printk(KERN_INFO "crisv10_dma dbg: ");printk(fmt, ## args) -#define dma_err(fmt, args...) \ - printk(KERN_ERR "crisv10_dma error: ");printk(fmt, ## args) -#define dma_warn(fmt, args...) \ - printk(KERN_INFO "crisv10_dma warning: ");printk(fmt, ## args) -#define dma_info(fmt, args...) \ - printk(KERN_INFO "crisv10_dma: ");printk(fmt, ## args) - - - -#define str_dir(pipe) \ - (usb_pipeout(pipe) ? "out" : "in") -#define str_type(pipe) \ - ({ \ - char *s = "?"; \ - switch (usb_pipetype(pipe)) { \ - case PIPE_ISOCHRONOUS: s = "iso"; break; \ - case PIPE_INTERRUPT: s = "intr"; break; \ - case PIPE_CONTROL: s = "ctrl"; break; \ - case PIPE_BULK: s = "bulk"; break; \ - }; \ - s; \ - }) diff --git a/target/linux/etrax/files/drivers/usb/host/hc-crisv10.c b/target/linux/etrax/files/drivers/usb/host/hc-crisv10.c deleted file mode 100644 index 146f689de7..0000000000 --- a/target/linux/etrax/files/drivers/usb/host/hc-crisv10.c +++ /dev/null @@ -1,4985 +0,0 @@ -/* - * - * ETRAX 100LX USB Host Controller Driver - * - * Copyright (C) 2005 - 2008 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-openwrt_diff" -#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 int crisv10_usb_check_bandwidth(struct usb_device *dev,struct urb *urb); -static void crisv10_usb_claim_bandwidth( - struct usb_device *dev, struct urb *urb, int bustime, int isoc); -static void crisv10_usb_release_bandwidth( - struct usb_hcd *hcd, int isoc, int bandwidth); - -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 urb *, gfp_t mem_flags); -static int tc_urb_dequeue(struct usb_hcd *, struct urb *, int); -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(®); - } - if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, epid_attn)) { - crisv10_hcd_epid_attn_irq(®); - } - if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, ctl_status)) { - crisv10_hcd_ctl_status_irq(®); - } - if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, iso_eof)) { - crisv10_hcd_isoc_eof_irq(®); - } - 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 *)®->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, ®->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; - __u8 reset_cnt; - switch(wFeature) { - case USB_PORT_FEAT_RESET: - rh_dbg("SetPortFeature: reset\n"); - - if (rh.wPortStatusPrev[bPort] & - IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes)) - { - __u8 restart_controller = 0; - - if ( (rh.wPortStatusPrev[0] & - IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes)) && - (rh.wPortStatusPrev[1] & - IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, yes)) ) - { - /* Both ports is enabled. The USB controller will not change state. */ - restart_controller = 0; - } - else - { - /* Only ports is enabled. The USB controller will change state and - must be restarted. */ - restart_controller = 1; - } - /* - In ETRAX 100LX it's not possible to reset an enabled root hub port. - The workaround is to disable and enable the port before resetting it. - Disabling the port can, if both ports are disabled at once, cause the - USB controller to change state to HOST_MODE state. - The USB controller state transition causes a lot of unwanted - interrupts that must be avoided. - Disabling the USB controller status and port status interrupts before - disabling/resetting the port stops these interrupts. - - These actions are performed: - 1. Disable USB controller status and port status interrupts. - 2. Disable the port - 3. Wait for the port to be disabled. - 4. Enable the port. - 5. Wait for the port to be enabled. - 6. Reset the port. - 7. Wait for for the reset to end. - 8. Wait for the USB controller entering started state. - 9. Order the USB controller to running state. - 10. Wait for the USB controller reaching running state. - 11. Clear all interrupts generated during the disable/enable/reset - procedure. - 12. Enable the USB controller status and port status interrupts. - */ - - /* 1. Disable USB controller status and USB port status interrupts. */ - *R_USB_IRQ_MASK_CLR = IO_STATE(R_USB_IRQ_MASK_CLR, ctl_status, clr); - __asm__ __volatile__ (" nop"); - *R_USB_IRQ_MASK_CLR = IO_STATE(R_USB_IRQ_MASK_CLR, port_status, clr); - __asm__ __volatile__ (" nop"); - - { - - /* Since an root hub port reset shall be 50 ms and the ETRAX 100LX - root hub port reset is 10 ms we must perform 5 port resets to - achieve a proper root hub port reset. */ - for (reset_cnt = 0; reset_cnt < 5; reset_cnt ++) - { - rh_dbg("Disable Port %d\n", bPort + 1); - - /* 2. Disable the port*/ - if (bPort == 0) - { - *R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, yes); - } - else - { - *R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, yes); - } - - /* 3. Wait for the port to be disabled. */ - while ( (bPort == 0) ? - *R_USB_RH_PORT_STATUS_1 & - IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes) : - *R_USB_RH_PORT_STATUS_2 & - IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, yes) ) {} - - rh_dbg("Port %d is disabled. Enable it!\n", bPort + 1); - - /* 4. Enable the port. */ - if (bPort == 0) - { - *R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, no); - } - else - { - *R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, no); - } - - /* 5. Wait for the port to be enabled again. */ - while (!( (bPort == 0) ? - *R_USB_RH_PORT_STATUS_1 & - IO_STATE(R_USB_RH_PORT_STATUS_1, connected, yes) : - *R_USB_RH_PORT_STATUS_2 & - IO_STATE(R_USB_RH_PORT_STATUS_2, connected, yes) ) ) {} - - rh_dbg("Port %d is enabled.\n", bPort + 1); - - /* 6. Reset the port */ - crisv10_ready_wait(); - *R_USB_COMMAND = - ( (bPort == 0) ? - IO_STATE(R_USB_COMMAND, port_sel, port1): - IO_STATE(R_USB_COMMAND, port_sel, port2) ) | - IO_STATE(R_USB_COMMAND, port_cmd, reset) | - IO_STATE(R_USB_COMMAND, busy, no) | - IO_STATE(R_USB_COMMAND, ctrl_cmd, nop); - rh_dbg("Port %d is resetting.\n", bPort + 1); - - /* 7. The USB specification says that we should wait for at least - 10ms for device recover */ - udelay(10500); /* 10,5ms blocking wait */ - - crisv10_ready_wait(); - } - } - - - /* Check if the USB controller needs to be restarted. */ - if (restart_controller) - { - /* 8. Wait for the USB controller entering started state. */ - while (!(*R_USB_STATUS & IO_STATE(R_USB_STATUS, started, yes))) {} - - /* 9. Order the USB controller to running state. */ - crisv10_ready_wait(); - *R_USB_COMMAND = - IO_STATE(R_USB_COMMAND, port_sel, nop) | - IO_STATE(R_USB_COMMAND, port_cmd, reset) | - IO_STATE(R_USB_COMMAND, busy, no) | - IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run); - - /* 10. Wait for the USB controller reaching running state. */ - while (!(*R_USB_STATUS & IO_STATE(R_USB_STATUS, running, yes))) {} - } - - /* 11. Clear any controller or port satus interrupts before enabling - the interrupts. */ - { - u16 dummy; - - /* Clear the port status interrupt of the reset port. */ - if (bPort == 0) - { - rh_dbg("Clearing port 1 interrupts\n"); - dummy = *R_USB_RH_PORT_STATUS_1; - } - else - { - rh_dbg("Clearing port 2 interrupts\n"); - dummy = *R_USB_RH_PORT_STATUS_2; - } - - if (restart_controller) - { - /* The USB controller is restarted. Clear all interupts. */ - rh_dbg("Clearing all interrupts\n"); - dummy = *R_USB_STATUS; - dummy = *R_USB_RH_PORT_STATUS_1; - dummy = *R_USB_RH_PORT_STATUS_2; - } - } - - /* 12. Enable USB controller status and USB port status interrupts. */ - *R_USB_IRQ_MASK_SET = IO_STATE(R_USB_IRQ_MASK_SET, ctl_status, set); - __asm__ __volatile__ (" nop"); - *R_USB_IRQ_MASK_SET = IO_STATE(R_USB_IRQ_MASK_SET, port_status, set); - __asm__ __volatile__ (" nop"); - - } - else - { - - bUsbCommand |= IO_STATE(R_USB_COMMAND, port_cmd, reset); - /* 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; - - /* 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; - 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; - 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 struct kmem_cache *usb_desc_cache; - -/* Cache for the data allocated in the isoc descr top half. */ -static struct kmem_cache *isoc_compl_cache; - -/* Cache for the data allocated when delayed finishing of URBs */ -static struct kmem_cache *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); - 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); - 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); - 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. */ - *R_DMA_CH8_SUB0_EP = virt_to_phys(ep); - /* 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 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 a epid for URBs destination, if not this function - set up one. */ - epid = tc_setup_epid(urb->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; - - /* 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_priv->bandwidth == 0) { - bustime = crisv10_usb_check_bandwidth(urb->dev, urb); - if (bustime < 0) { - tc_err("Not enough periodic bandwidth\n"); - urb_priv_free(hcd, urb); - DBFEXIT; - return -ENOSPC; - } - } - } - - 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) { - crisv10_usb_claim_bandwidth(urb->dev, - urb, - bustime, - (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)); - } - - /* 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, int status) { - 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->status = status; - 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(struct work_struct* work) { - unsigned long flags; - struct urb_later_data* uld; - - local_irq_save(flags); - uld = container_of(work, struct urb_later_data, dws.work); - 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, GFP_ATOMIC); - ASSERT(uld); - - uld->hcd = hcd; - uld->urb = urb; - uld->urb_num = urb_priv->urb_num; - uld->status = status; - - INIT_DELAYED_WORK(&uld->dws, tc_finish_urb_later_proc); - urb_priv->later_data = uld; - - /* Schedule the finishing of the URB to happen later */ - schedule_delayed_work(&uld->dws, 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)) - crisv10_usb_release_bandwidth(hcd, - usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS, - urb_priv->bandwidth); - - /* 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, status); - - /* 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; - int bandwidth = 0; - - 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*/ - bandwidth = urb_priv->bandwidth; - urb_priv_free(hcd, urb); - - crisv10_usb_release_bandwidth(hcd, usb_pipeisoc(urb->pipe), bandwidth); - - /* Hand the URB from HCD to its USB device driver, using its completion - functions */ - usb_hcd_giveback_urb (hcd, urb, status); -} - -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++; - urb_priv->bandwidth = 0; - 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; -} - -/* - * usb_check_bandwidth(): - * - * old_alloc is from host_controller->bandwidth_allocated in microseconds; - * bustime is from calc_bus_time(), but converted to microseconds. - * - * returns <bustime in us> if successful, - * or -ENOSPC if bandwidth request fails. - * - * FIXME: - * This initial implementation does not use Endpoint.bInterval - * in managing bandwidth allocation. - * It probably needs to be expanded to use Endpoint.bInterval. - * This can be done as a later enhancement (correction). - * - * This will also probably require some kind of - * frame allocation tracking...meaning, for example, - * that if multiple drivers request interrupts every 10 USB frames, - * they don't all have to be allocated at - * frame numbers N, N+10, N+20, etc. Some of them could be at - * N+11, N+21, N+31, etc., and others at - * N+12, N+22, N+32, etc. - * - * Similarly for isochronous transfers... - * - * Individual HCDs can schedule more directly ... this logic - * is not correct for high speed transfers. - */ -static int crisv10_usb_check_bandwidth( - struct usb_device *dev, - struct urb *urb) -{ - unsigned int pipe = urb->pipe; - long bustime; - int is_in = usb_pipein (pipe); - int is_iso = usb_pipeisoc (pipe); - int old_alloc = dev->bus->bandwidth_allocated; - int new_alloc; - - bustime = NS_TO_US (usb_calc_bus_time (dev->speed, is_in, is_iso, - usb_maxpacket (dev, pipe, !is_in))); - if (is_iso) - bustime /= urb->number_of_packets; - - new_alloc = old_alloc + (int) bustime; - if (new_alloc > FRAME_TIME_MAX_USECS_ALLOC) { - dev_dbg (&dev->dev, "usb_check_bandwidth FAILED: %d + %ld = %d usec\n", - old_alloc, bustime, new_alloc); - bustime = -ENOSPC; /* report error */ - } - - return bustime; -} - -/** - * usb_claim_bandwidth - records bandwidth for a periodic transfer - * @dev: source/target of request - * @urb: request (urb->dev == dev) - * @bustime: bandwidth consumed, in (average) microseconds per frame - * @isoc: true iff the request is isochronous - * - * HCDs are expected not to overcommit periodic bandwidth, and to record such - * reservations whenever endpoints are added to the periodic schedule. - * - * FIXME averaging per-frame is suboptimal. Better to sum over the HCD's - * entire periodic schedule ... 32 frames for OHCI, 1024 for UHCI, settable - * for EHCI (256/512/1024 frames, default 1024) and have the bus expose how - * large its periodic schedule is. - */ -static void crisv10_usb_claim_bandwidth( - struct usb_device *dev, - struct urb *urb, int bustime, int isoc) -{ - dev->bus->bandwidth_allocated += bustime; - if (isoc) - dev->bus->bandwidth_isoc_reqs++; - else - dev->bus->bandwidth_int_reqs++; - struct crisv10_urb_priv *urb_priv; - urb_priv = urb->hcpriv; - urb_priv->bandwidth = bustime; -} - -/** - * usb_release_bandwidth - reverses effect of usb_claim_bandwidth() - * @hcd: host controller - * @isoc: true iff the request is isochronous - * @bandwidth: bandwidth returned - * - * This records that previously allocated bandwidth has been released. - * Bandwidth is released when endpoints are removed from the host controller's - * periodic schedule. - */ -static void crisv10_usb_release_bandwidth( - struct usb_hcd *hcd, - int isoc, - int bandwidth) -{ - hcd_to_bus(hcd)->bandwidth_allocated -= bandwidth; - if (isoc) - hcd_to_bus(hcd)->bandwidth_isoc_reqs--; - else - hcd_to_bus(hcd)->bandwidth_int_reqs--; -} - - -/* 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_CLR = IO_STATE(R_USB_IRQ_MASK_CLR, iso_eof, clr); - 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; - 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(struct work_struct* work) { - 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 = container_of(work, struct crisv10_isoc_complete_data, usb_bh); - - 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, GFP_ATOMIC); - ASSERT(comp_data != NULL); - comp_data ->hcd = hcd; - - INIT_WORK(&comp_data->usb_bh, complete_isoc_bottom_half); - 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); diff --git a/target/linux/etrax/files/drivers/usb/host/hc-crisv10.h b/target/linux/etrax/files/drivers/usb/host/hc-crisv10.h deleted file mode 100644 index 58a0b6238b..0000000000 --- a/target/linux/etrax/files/drivers/usb/host/hc-crisv10.h +++ /dev/null @@ -1,333 +0,0 @@ -#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 delayed_work dws; - 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; - - /* Allocated bandwidth for isochronous and interrupt traffic */ - int bandwidth; -}; - - -/* 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 |