strip the kernel version suffix from target directories, except for brcm-2.4 (the -2.4 will be included in the board name here). CONFIG_LINUX_<ver>_<board> becomes CONFIG_TARGET_<board>, same for profiles.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8653 3c298f89-4303-0410-b956-a3cf2f4a3e73

4 files changed, 1797 insertions, 0 deletions

diff --git a/target/linux/atheros/files/drivers/net/ar2313/Makefile b/target/linux/atheros/files/drivers/net/ar2313/Makefile
new file mode 100644
index 0000000000..9eb63e46b6
--- /dev/null
+++ b/target/linux/atheros/files/drivers/net/ar2313/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for the AR2313 ethernet driver
+#
+
+obj-$(CONFIG_AR2313)	+= ar2313.o
diff --git a/target/linux/atheros/files/drivers/net/ar2313/ar2313.c b/target/linux/atheros/files/drivers/net/ar2313/ar2313.c
new file mode 100644
index 0000000000..735ceebd93
--- /dev/null
+++ b/target/linux/atheros/files/drivers/net/ar2313/ar2313.c
@@ -0,0 +1,1457 @@
+/*
+ * ar2313.c: Linux driver for the Atheros AR231x Ethernet device.
+ *
+ * Copyright (C) 2004 by Sameer Dekate <sdekate@arubanetworks.com>
+ * Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org>
+ * Copyright (C) 2006-2007 Felix Fietkau <nbd@openwrt.org>
+ *
+ * Thanks to Atheros for providing hardware and documentation
+ * enabling me to write this driver.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Additional credits:
+ * 	This code is taken from John Taylor's Sibyte driver and then 
+ * 	modified for the AR2313.
+ */
+
+#include <linux/autoconf.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/mm.h>
+#include <linux/highmem.h>
+#include <linux/sockios.h>
+#include <linux/pkt_sched.h>
+#include <linux/compile.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/ctype.h>
+#include <linux/platform_device.h>
+
+#include <net/sock.h>
+#include <net/ip.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/byteorder.h>
+#include <asm/uaccess.h>
+#include <asm/bootinfo.h>
+
+#define AR2313_MTU                     1692
+#define AR2313_PRIOS                   1
+#define AR2313_QUEUES                  (2*AR2313_PRIOS)
+#define AR2313_DESCR_ENTRIES           64
+
+#undef INDEX_DEBUG
+#define DEBUG     0
+#define DEBUG_TX  0
+#define DEBUG_RX  0
+#define DEBUG_INT 0
+#define DEBUG_MC  0
+#define DEBUG_ERR 1
+
+#ifndef min
+#define min(a,b)	(((a)<(b))?(a):(b))
+#endif
+
+#ifndef SMP_CACHE_BYTES
+#define SMP_CACHE_BYTES	L1_CACHE_BYTES
+#endif
+
+#define AR2313_MBOX_SET_BIT  0x8
+
+#define BOARD_IDX_STATIC	0
+#define BOARD_IDX_OVERFLOW	-1
+
+#include "dma.h"
+#include "ar2313.h"
+
+/*
+ * New interrupt handler strategy:
+ *
+ * An old interrupt handler worked using the traditional method of
+ * replacing an skbuff with a new one when a packet arrives. However
+ * the rx rings do not need to contain a static number of buffer
+ * descriptors, thus it makes sense to move the memory allocation out
+ * of the main interrupt handler and do it in a bottom half handler
+ * and only allocate new buffers when the number of buffers in the
+ * ring is below a certain threshold. In order to avoid starving the
+ * NIC under heavy load it is however necessary to force allocation
+ * when hitting a minimum threshold. The strategy for alloction is as
+ * follows:
+ *
+ *     RX_LOW_BUF_THRES    - allocate buffers in the bottom half
+ *     RX_PANIC_LOW_THRES  - we are very low on buffers, allocate
+ *                           the buffers in the interrupt handler
+ *     RX_RING_THRES       - maximum number of buffers in the rx ring
+ *
+ * One advantagous side effect of this allocation approach is that the
+ * entire rx processing can be done without holding any spin lock
+ * since the rx rings and registers are totally independent of the tx
+ * ring and its registers.  This of course includes the kmalloc's of
+ * new skb's. Thus start_xmit can run in parallel with rx processing
+ * and the memory allocation on SMP systems.
+ *
+ * Note that running the skb reallocation in a bottom half opens up
+ * another can of races which needs to be handled properly. In
+ * particular it can happen that the interrupt handler tries to run
+ * the reallocation while the bottom half is either running on another
+ * CPU or was interrupted on the same CPU. To get around this the
+ * driver uses bitops to prevent the reallocation routines from being
+ * reentered.
+ *
+ * TX handling can also be done without holding any spin lock, wheee
+ * this is fun! since tx_csm is only written to by the interrupt
+ * handler.
+ */
+
+/*
+ * Threshold values for RX buffer allocation - the low water marks for
+ * when to start refilling the rings are set to 75% of the ring
+ * sizes. It seems to make sense to refill the rings entirely from the
+ * intrrupt handler once it gets below the panic threshold, that way
+ * we don't risk that the refilling is moved to another CPU when the
+ * one running the interrupt handler just got the slab code hot in its
+ * cache.
+ */
+#define RX_RING_SIZE		AR2313_DESCR_ENTRIES
+#define RX_PANIC_THRES	        (RX_RING_SIZE/4)
+#define RX_LOW_THRES	        ((3*RX_RING_SIZE)/4)
+#define CRC_LEN                 4
+#define RX_OFFSET               2
+
+#define AR2313_BUFSIZE		(AR2313_MTU + ETH_HLEN + CRC_LEN + RX_OFFSET)
+
+#ifdef MODULE
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Sameer Dekate <sdekate@arubanetworks.com>, Imre Kaloz <kaloz@openwrt.org>, Felix Fietkau <nbd@openwrt.org>");
+MODULE_DESCRIPTION("AR2313 Ethernet driver");
+#endif
+
+#define virt_to_phys(x) ((u32)(x) & 0x1fffffff)
+
+// prototypes
+static short armiiread(struct net_device *dev, short phy, short reg);
+static void armiiwrite(struct net_device *dev, short phy, short reg,
+					   short data);
+#ifdef TX_TIMEOUT
+static void ar2313_tx_timeout(struct net_device *dev);
+#endif
+static void ar2313_halt(struct net_device *dev);
+static void rx_tasklet_func(unsigned long data);
+static void ar2313_multicast_list(struct net_device *dev);
+
+#ifndef ERR
+#define ERR(fmt, args...) printk("%s: " fmt, __func__, ##args)
+#endif
+
+
+int __init ar2313_probe(struct platform_device *pdev)
+{
+	struct net_device *dev;
+	struct ar2313_private *sp;
+	struct resource *res;
+	unsigned long ar_eth_base;
+	char buf[64];
+
+	dev = alloc_etherdev(sizeof(struct ar2313_private));
+
+	if (dev == NULL) {
+		printk(KERN_ERR
+			   "ar2313: Unable to allocate net_device structure!\n");
+		return -ENOMEM;
+	}
+
+	SET_MODULE_OWNER(dev);
+	platform_set_drvdata(pdev, dev);
+
+	sp = dev->priv;
+	sp->dev = dev;
+	sp->cfg = pdev->dev.platform_data;
+
+	sprintf(buf, "eth%d_membase", pdev->id);
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, buf);
+	if (!res)
+		return -ENODEV;
+
+	sp->link = 0;
+	ar_eth_base = res->start;
+	sp->phy = sp->cfg->phy;
+
+	sprintf(buf, "eth%d_irq", pdev->id);
+	dev->irq = platform_get_irq_byname(pdev, buf);
+
+	spin_lock_init(&sp->lock);
+
+	/* initialize func pointers */
+	dev->open = &ar2313_open;
+	dev->stop = &ar2313_close;
+	dev->hard_start_xmit = &ar2313_start_xmit;
+
+	dev->get_stats = &ar2313_get_stats;
+	dev->set_multicast_list = &ar2313_multicast_list;
+#ifdef TX_TIMEOUT
+	dev->tx_timeout = ar2313_tx_timeout;
+	dev->watchdog_timeo = AR2313_TX_TIMEOUT;
+#endif
+	dev->do_ioctl = &ar2313_ioctl;
+
+	// SAMEER: do we need this?
+	dev->features |= NETIF_F_SG | NETIF_F_HIGHDMA;
+
+	tasklet_init(&sp->rx_tasklet, rx_tasklet_func, (unsigned long) dev);
+	tasklet_disable(&sp->rx_tasklet);
+
+	sp->eth_regs =
+		ioremap_nocache(virt_to_phys(ar_eth_base), sizeof(*sp->eth_regs));
+	if (!sp->eth_regs) {
+		printk("Can't remap eth registers\n");
+		return (-ENXIO);
+	}
+
+	/* 
+	 * When there's only one MAC, PHY regs are typically on ENET0, 
+	 * even though the MAC might be on ENET1.
+	 * Needto remap PHY regs separately in this case
+	 */
+	if (virt_to_phys(ar_eth_base) == virt_to_phys(sp->phy_regs))
+		sp->phy_regs = sp->eth_regs;
+	else {
+		sp->phy_regs =
+			ioremap_nocache(virt_to_phys(sp->cfg->phy_base),
+							sizeof(*sp->phy_regs));
+		if (!sp->phy_regs) {
+			printk("Can't remap phy registers\n");
+			return (-ENXIO);
+		}
+	}
+
+	sp->dma_regs =
+		ioremap_nocache(virt_to_phys(ar_eth_base + 0x1000),
+						sizeof(*sp->dma_regs));
+	dev->base_addr = (unsigned int) sp->dma_regs;
+	if (!sp->dma_regs) {
+		printk("Can't remap DMA registers\n");
+		return (-ENXIO);
+	}
+
+	sp->int_regs = ioremap_nocache(virt_to_phys(sp->cfg->reset_base), 4);
+	if (!sp->int_regs) {
+		printk("Can't remap INTERRUPT registers\n");
+		return (-ENXIO);
+	}
+
+	strncpy(sp->name, "Atheros AR231x", sizeof(sp->name) - 1);
+	sp->name[sizeof(sp->name) - 1] = '\0';
+	memcpy(dev->dev_addr, sp->cfg->macaddr, 6);
+	sp->board_idx = BOARD_IDX_STATIC;
+
+	if (ar2313_init(dev)) {
+		/* 
+		 * ar2313_init() calls ar2313_init_cleanup() on error.
+		 */
+		kfree(dev);
+		return -ENODEV;
+	}
+
+	if (register_netdev(dev)) {
+		printk("%s: register_netdev failed\n", __func__);
+		return -1;
+	}
+
+	printk("%s: %s: %02x:%02x:%02x:%02x:%02x:%02x, irq %d\n",
+		   dev->name, sp->name,
+		   dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
+		   dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5], dev->irq);
+
+	/* start link poll timer */
+	ar2313_setup_timer(dev);
+
+	return 0;
+}
+
+#if 0
+static void ar2313_dump_regs(struct net_device *dev)
+{
+	unsigned int *ptr, i;
+	struct ar2313_private *sp = (struct ar2313_private *) dev->priv;
+
+	ptr = (unsigned int *) sp->eth_regs;
+	for (i = 0; i < (sizeof(ETHERNET_STRUCT) / sizeof(unsigned int));
+		 i++, ptr++) {
+		printk("ENET: %08x = %08x\n", (int) ptr, *ptr);
+	}
+
+	ptr = (unsigned int *) sp->dma_regs;
+	for (i = 0; i < (sizeof(DMA) / sizeof(unsigned int)); i++, ptr++) {
+		printk("DMA: %08x = %08x\n", (int) ptr, *ptr);
+	}
+
+	ptr = (unsigned int *) sp->int_regs;
+	for (i = 0; i < (sizeof(INTERRUPT) / sizeof(unsigned int)); i++, ptr++) {
+		printk("INT: %08x = %08x\n", (int) ptr, *ptr);
+	}
+
+	for (i = 0; i < AR2313_DESCR_ENTRIES; i++) {
+		ar2313_descr_t *td = &sp->tx_ring[i];
+		printk("Tx desc %2d: %08x %08x %08x %08x\n", i,
+			   td->status, td->devcs, td->addr, td->descr);
+	}
+}
+#endif
+
+#ifdef TX_TIMEOUT
+static void ar2313_tx_timeout(struct net_device *dev)
+{
+	struct ar2313_private *sp = (struct ar2313_private *) dev->priv;
+	unsigned long flags;
+
+#if DEBUG_TX
+	printk("Tx timeout\n");
+#endif
+	spin_lock_irqsave(&sp->lock, flags);
+	ar2313_restart(dev);
+	spin_unlock_irqrestore(&sp->lock, flags);
+}
+#endif
+
+#if DEBUG_MC
+static void printMcList(struct net_device *dev)
+{
+	struct dev_mc_list *list = dev->mc_list;
+	int num = 0, i;
+	while (list) {
+		printk("%d MC ADDR ", num);
+		for (i = 0; i < list->dmi_addrlen; i++) {
+			printk(":%02x", list->dmi_addr[i]);
+		}
+		list = list->next;
+		printk("\n");
+	}
+}
+#endif
+
+/*
+ * Set or clear the multicast filter for this adaptor.
+ * THIS IS ABSOLUTE CRAP, disabled
+ */
+static void ar2313_multicast_list(struct net_device *dev)
+{
+	/* 
+	 * Always listen to broadcasts and 
+	 * treat IFF bits independently 
+	 */
+	struct ar2313_private *sp = (struct ar2313_private *) dev->priv;
+	unsigned int recognise;
+
+	recognise = sp->eth_regs->mac_control;
+
+	if (dev->flags & IFF_PROMISC) {	/* set promiscuous mode */
+		recognise |= MAC_CONTROL_PR;
+	} else {
+		recognise &= ~MAC_CONTROL_PR;
+	}
+
+	if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 15)) {
+#if DEBUG_MC
+		printMcList(dev);
+		printk("%s: all MULTICAST mc_count %d\n", __FUNCTION__,
+			   dev->mc_count);
+#endif
+		recognise |= MAC_CONTROL_PM;	/* all multicast */
+	} else if (dev->mc_count > 0) {
+#if DEBUG_MC
+		printMcList(dev);
+		printk("%s: mc_count %d\n", __FUNCTION__, dev->mc_count);
+#endif
+		recognise |= MAC_CONTROL_PM;	/* for the time being */
+	}
+#if DEBUG_MC
+	printk("%s: setting %08x to %08x\n", __FUNCTION__, (int) sp->eth_regs,
+		   recognise);
+#endif
+
+	sp->eth_regs->mac_control = recognise;
+}
+
+static void rx_tasklet_cleanup(struct net_device *dev)
+{
+	struct ar2313_private *sp = dev->priv;
+
+	/* 
+	 * Tasklet may be scheduled. Need to get it removed from the list
+	 * since we're about to free the struct.
+	 */
+
+	sp->unloading = 1;
+	tasklet_enable(&sp->rx_tasklet);
+	tasklet_kill(&sp->rx_tasklet);
+}
+
+static int __exit ar2313_remove(struct platform_device *pdev)
+{
+	struct net_device *dev = platform_get_drvdata(pdev);
+	rx_tasklet_cleanup(dev);
+	ar2313_init_cleanup(dev);
+	unregister_netdev(dev);
+	kfree(dev);
+	return 0;
+}
+
+
+/*
+ * Restart the AR2313 ethernet controller. 
+ */
+static int ar2313_restart(struct net_device *dev)
+{
+	/* disable interrupts */
+	disable_irq(dev->irq);
+
+	/* stop mac */
+	ar2313_halt(dev);
+
+	/* initialize */
+	ar2313_init(dev);
+
+	/* enable interrupts */
+	enable_irq(dev->irq);
+
+	return 0;
+}
+
+static struct platform_driver ar2313_driver = {
+	.driver.name = "ar531x-eth",
+	.probe = ar2313_probe,
+	.remove = ar2313_remove,
+};
+
+int __init ar2313_module_init(void)
+{
+	return platform_driver_register(&ar2313_driver);
+}
+
+void __exit ar2313_module_cleanup(void)
+{
+	platform_driver_unregister(&ar2313_driver);
+}
+
+module_init(ar2313_module_init);
+module_exit(ar2313_module_cleanup);
+
+
+static void ar2313_free_descriptors(struct net_device *dev)
+{
+	struct ar2313_private *sp = dev->priv;
+	if (sp->rx_ring != NULL) {
+		kfree((void *) KSEG0ADDR(sp->rx_ring));
+		sp->rx_ring = NULL;
+		sp->tx_ring = NULL;
+	}
+}
+
+
+static int ar2313_allocate_descriptors(struct net_device *dev)
+{
+	struct ar2313_private *sp = dev->priv;
+	int size;
+	int j;
+	ar2313_descr_t *space;
+
+	if (sp->rx_ring != NULL) {
+		printk("%s: already done.\n", __FUNCTION__);
+		return 0;
+	}
+
+	size =
+		(sizeof(ar2313_descr_t) * (AR2313_DESCR_ENTRIES * AR2313_QUEUES));
+	space = kmalloc(size, GFP_KERNEL);
+	if (space == NULL)
+		return 1;
+
+	/* invalidate caches */
+	dma_cache_inv((unsigned int) space, size);
+
+	/* now convert pointer to KSEG1 */
+	space = (ar2313_descr_t *) KSEG1ADDR(space);
+
+	memset((void *) space, 0, size);
+
+	sp->rx_ring = space;
+	space += AR2313_DESCR_ENTRIES;
+
+	sp->tx_ring = space;
+	space += AR2313_DESCR_ENTRIES;
+
+	/* Initialize the transmit Descriptors */
+	for (j = 0; j < AR2313_DESCR_ENTRIES; j++) {
+		ar2313_descr_t *td = &sp->tx_ring[j];
+		td->status = 0;
+		td->devcs = DMA_TX1_CHAINED;
+		td->addr = 0;
+		td->descr =
+			virt_to_phys(&sp->
+						 tx_ring[(j + 1) & (AR2313_DESCR_ENTRIES - 1)]);
+	}
+
+	return 0;
+}
+
+
+/*
+ * Generic cleanup handling data allocated during init. Used when the
+ * module is unloaded or if an error occurs during initialization
+ */
+static void ar2313_init_cleanup(struct net_device *dev)
+{
+	struct ar2313_private *sp = dev->priv;
+	struct sk_buff *skb;
+	int j;
+
+	ar2313_free_descriptors(dev);
+
+	if (sp->eth_regs)
+		iounmap((void *) sp->eth_regs);
+	if (sp->dma_regs)
+		iounmap((void *) sp->dma_regs);
+
+	if (sp->rx_skb) {
+		for (j = 0; j < AR2313_DESCR_ENTRIES; j++) {
+			skb = sp->rx_skb[j];
+			if (skb) {
+				sp->rx_skb[j] = NULL;
+				dev_kfree_skb(skb);
+			}
+		}
+		kfree(sp->rx_skb);
+		sp->rx_skb = NULL;
+	}
+
+	if (sp->tx_skb) {
+		for (j = 0; j < AR2313_DESCR_ENTRIES; j++) {
+			skb = sp->tx_skb[j];
+			if (skb) {
+				sp->tx_skb[j] = NULL;
+				dev_kfree_skb(skb);
+			}
+		}
+		kfree(sp->tx_skb);
+		sp->tx_skb = NULL;
+	}
+}
+
+static int ar2313_setup_timer(struct net_device *dev)
+{
+	struct ar2313_private *sp = dev->priv;
+
+	init_timer(&sp->link_timer);
+
+	sp->link_timer.function = ar2313_link_timer_fn;
+	sp->link_timer.data = (int) dev;
+	sp->link_timer.expires = jiffies + HZ;
+
+	add_timer(&sp->link_timer);
+	return 0;
+
+}
+
+static void ar2313_link_timer_fn(unsigned long data)
+{
+	struct net_device *dev = (struct net_device *) data;
+	struct ar2313_private *sp = dev->priv;
+
+	// see if the link status changed
+	// This was needed to make sure we set the PHY to the
+	// autonegotiated value of half or full duplex.
+	ar2313_check_link(dev);
+
+	// Loop faster when we don't have link. 
+	// This was needed to speed up the AP bootstrap time.
+	if (sp->link == 0) {
+		mod_timer(&sp->link_timer, jiffies + HZ / 2);
+	} else {
+		mod_timer(&sp->link_timer, jiffies + LINK_TIMER);
+	}
+}
+
+static void ar2313_check_link(struct net_device *dev)
+{
+	struct ar2313_private *sp = dev->priv;
+	u16 phyData;
+
+	phyData = armiiread(dev, sp->phy, MII_BMSR);
+	if (sp->phyData != phyData) {
+		if (phyData & BMSR_LSTATUS) {
+			/* link is present, ready link partner ability to deterine
+			   duplexity */
+			int duplex = 0;
+			u16 reg;
+
+			sp->link = 1;
+			reg = armiiread(dev, sp->phy, MII_BMCR);
+			if (reg & BMCR_ANENABLE) {
+				/* auto neg enabled */
+				reg = armiiread(dev, sp->phy, MII_LPA);
+				duplex = (reg & (LPA_100FULL | LPA_10FULL)) ? 1 : 0;
+			} else {
+				/* no auto neg, just read duplex config */
+				duplex = (reg & BMCR_FULLDPLX) ? 1 : 0;
+			}
+
+			printk(KERN_INFO "%s: Configuring MAC for %s duplex\n",
+				   dev->name, (duplex) ? "full" : "half");
+
+			if (duplex) {
+				/* full duplex */
+				sp->eth_regs->mac_control =
+					((sp->eth_regs->
+					  mac_control | MAC_CONTROL_F) & ~MAC_CONTROL_DRO);
+			} else {
+				/* half duplex */
+				sp->eth_regs->mac_control =
+					((sp->eth_regs->
+					  mac_control | MAC_CONTROL_DRO) & ~MAC_CONTROL_F);
+			}
+		} else {
+			/* no link */
+			sp->link = 0;
+		}
+		sp->phyData = phyData;
+	}
+}
+
+static int ar2313_reset_reg(struct net_device *dev)
+{
+	struct ar2313_private *sp = (struct ar2313_private *) dev->priv;
+	unsigned int ethsal, ethsah;
+	unsigned int flags;
+
+	*sp->int_regs |= sp->cfg->reset_mac;
+	mdelay(10);
+	*sp->int_regs &= ~sp->cfg->reset_mac;
+	mdelay(10);
+	*sp->int_regs |= sp->cfg->reset_phy;
+	mdelay(10);
+	*sp->int_regs &= ~sp->cfg->reset_phy;
+	mdelay(10);
+
+	sp->dma_regs->bus_mode = (DMA_BUS_MODE_SWR);
+	mdelay(10);
+	sp->dma_regs->bus_mode =
+		((32 << DMA_BUS_MODE_PBL_SHIFT) | DMA_BUS_MODE_BLE);
+
+	/* enable interrupts */
+	sp->dma_regs->intr_ena = (DMA_STATUS_AIS |
+							  DMA_STATUS_NIS |
+							  DMA_STATUS_RI |
+							  DMA_STATUS_TI | DMA_STATUS_FBE);
+	sp->dma_regs->xmt_base = virt_to_phys(sp->tx_ring);
+	sp->dma_regs->rcv_base = virt_to_phys(sp->rx_ring);
+	sp->dma_regs->control =
+		(DMA_CONTROL_SR | DMA_CONTROL_ST | DMA_CONTROL_SF);
+
+	sp->eth_regs->flow_control = (FLOW_CONTROL_FCE);
+	sp->eth_regs->vlan_tag = (0x8100);
+
+	/* Enable Ethernet Interface */
+	flags = (MAC_CONTROL_TE |	/* transmit enable */
+			 MAC_CONTROL_PM |	/* pass mcast */
+			 MAC_CONTROL_F |	/* full duplex */
+			 MAC_CONTROL_HBD);	/* heart beat disabled */
+
+	if (dev->flags & IFF_PROMISC) {	/* set promiscuous mode */
+		flags |= MAC_CONTROL_PR;
+	}
+	sp->eth_regs->mac_control = flags;
+
+	/* Set all Ethernet station address registers to their initial values */
+	ethsah = ((((u_int) (dev->dev_addr[5]) << 8) & (u_int) 0x0000FF00) |
+			  (((u_int) (dev->dev_addr[4]) << 0) & (u_int) 0x000000FF));
+
+	ethsal = ((((u_int) (dev->dev_addr[3]) << 24) & (u_int) 0xFF000000) |
+			  (((u_int) (dev->dev_addr[2]) << 16) & (u_int) 0x00FF0000) |
+			  (((u_int) (dev->dev_addr[1]) << 8) & (u_int) 0x0000FF00) |
+			  (((u_int) (dev->dev_addr[0]) << 0) & (u_int) 0x000000FF));
+
+	sp->eth_regs->mac_addr[0] = ethsah;
+	sp->eth_regs->mac_addr[1] = ethsal;
+
+	mdelay(10);
+
+	return (0);
+}
+
+
+static int ar2313_init(struct net_device *dev)
+{
+	struct ar2313_private *sp = dev->priv;
+	int ecode = 0;
+
+	/* 
+	 * Allocate descriptors
+	 */
+	if (ar2313_allocate_descriptors(dev)) {
+		printk("%s: %s: ar2313_allocate_descriptors failed\n",
+			   dev->name, __FUNCTION__);
+		ecode = -EAGAIN;
+		goto init_error;
+	}
+
+	/* 
+	 * Get the memory for the skb rings.
+	 */
+	if (sp->rx_skb == NULL) {
+		sp->rx_skb =
+			kmalloc(sizeof(struct sk_buff *) * AR2313_DESCR_ENTRIES,
+					GFP_KERNEL);
+		if (!(sp->rx_skb)) {
+			printk("%s: %s: rx_skb kmalloc failed\n",
+				   dev->name, __FUNCTION__);
+			ecode = -EAGAIN;
+			goto init_error;
+		}
+	}
+	memset(sp->rx_skb, 0, sizeof(struct sk_buff *) * AR2313_DESCR_ENTRIES);
+
+	if (sp->tx_skb == NULL) {
+		sp->tx_skb =
+			kmalloc(sizeof(struct sk_buff *) * AR2313_DESCR_ENTRIES,
+					GFP_KERNEL);
+		if (!(sp->tx_skb)) {
+			printk("%s: %s: tx_skb kmalloc failed\n",
+				   dev->name, __FUNCTION__);
+			ecode = -EAGAIN;
+			goto init_error;
+		}
+	}
+	memset(sp->tx_skb, 0, sizeof(struct sk_buff *) * AR2313_DESCR_ENTRIES);
+
+	/* 
+	 * Set tx_csm before we start receiving interrupts, otherwise
+	 * the interrupt handler might think it is supposed to process
+	 * tx ints before we are up and running, which may cause a null
+	 * pointer access in the int handler.
+	 */
+	sp->rx_skbprd = 0;
+	sp->cur_rx = 0;
+	sp->tx_prd = 0;
+	sp->tx_csm = 0;
+
+	/* 
+	 * Zero the stats before starting the interface
+	 */
+	memset(&sp->stats, 0, sizeof(sp->stats));
+
+	/* 
+	 * We load the ring here as there seem to be no way to tell the
+	 * firmware to wipe the ring without re-initializing it.
+	 */
+	ar2313_load_rx_ring(dev, RX_RING_SIZE);
+
+	/* 
+	 * Init hardware
+	 */
+	ar2313_reset_reg(dev);
+
+	/* 
+	 * Get the IRQ
+	 */
+	ecode =
+		request_irq(dev->irq, &ar2313_interrupt,
+					IRQF_SHARED | IRQF_DISABLED | IRQF_SAMPLE_RANDOM,
+					dev->name, dev);
+	if (ecode) {
+		printk(KERN_WARNING "%s: %s: Requested IRQ %d is busy\n",
+			   dev->name, __FUNCTION__, dev->irq);
+		goto init_error;
+	}
+
+
+	tasklet_enable(&sp->rx_tasklet);
+
+	return 0;
+
+  init_error:
+	ar2313_init_cleanup(dev);
+	return ecode;
+}
+
+/*
+ * Load the rx ring.
+ *
+ * Loading rings is safe without holding the spin lock since this is
+ * done only before the device is enabled, thus no interrupts are
+ * generated and by the interrupt handler/tasklet handler.
+ */
+static void ar2313_load_rx_ring(struct net_device *dev, int nr_bufs)
+{
+
+	struct ar2313_private *sp = ((struct net_device *) dev)->priv;
+	short i, idx;
+
+	idx = sp->rx_skbprd;
+
+	for (i = 0; i < nr_bufs; i++) {
+		struct sk_buff *skb;
+		ar2313_descr_t *rd;
+
+		if (sp->rx_skb[idx]) {
+#if DEBUG_RX
+			printk(KERN_INFO "ar2313 rx refill full\n");
+#endif							/* DEBUG */
+			break;
+		}
+		// partha: create additional room for the second GRE fragment
+		skb = alloc_skb(AR2313_BUFSIZE + 128, GFP_ATOMIC);
+		if (!skb) {
+			printk("\n\n\n\n %s: No memory in system\n\n\n\n",
+				   __FUNCTION__);
+			break;
+		}
+		// partha: create additional room in the front for tx pkt capture
+		skb_reserve(skb, 32);
+
+		/* 
+		 * Make sure IP header starts on a fresh cache line.
+		 */
+		skb->dev = dev;
+		skb_reserve(skb, RX_OFFSET);
+		sp->rx_skb[idx] = skb;
+
+		rd = (ar2313_descr_t *) & sp->rx_ring[idx];
+
+		/* initialize dma descriptor */
+		rd->devcs = ((AR2313_BUFSIZE << DMA_RX1_BSIZE_SHIFT) |
+					 DMA_RX1_CHAINED);
+		rd->addr = virt_to_phys(skb->data);
+		rd->descr =
+			virt_to_phys(&sp->
+						 rx_ring[(idx + 1) & (AR2313_DESCR_ENTRIES - 1)]);
+		rd->status = DMA_RX_OWN;
+
+		idx = DSC_NEXT(idx);
+	}
+
+	if (!i) {
+#if DEBUG_ERR
+		printk(KERN_INFO
+			   "Out of memory when allocating standard receive buffers\n");
+#endif							/* DEBUG */
+	} else {
+		sp->rx_skbprd = idx;
+	}
+
+	return;
+}
+
+#define AR2313_MAX_PKTS_PER_CALL        64
+
+static int ar2313_rx_int(struct net_device *dev)
+{
+	struct ar2313_private *sp = dev->priv;
+	struct sk_buff *skb, *skb_new;
+	ar2313_descr_t *rxdesc;
+	unsigned int status;
+	u32 idx;
+	int pkts = 0;
+	int rval;
+
+	idx = sp->cur_rx;
+
+	/* process at most the entire ring and then wait for another interrupt 
+	 */
+	while (1) {
+
+		rxdesc = &sp->rx_ring[idx];
+		status = rxdesc->status;
+		if (status & DMA_RX_OWN) {
+			/* SiByte owns descriptor or descr not yet filled in */
+			rval = 0;
+			break;
+		}
+
+		if (++pkts > AR2313_MAX_PKTS_PER_CALL) {
+			rval = 1;
+			break;
+		}
+#if DEBUG_RX
+		printk("index %d\n", idx);
+		printk("RX status %08x\n", rxdesc->status);
+		printk("RX devcs  %08x\n", rxdesc->devcs);
+		printk("RX addr   %08x\n", rxdesc->addr);
+		printk("RX descr  %08x\n", rxdesc->descr);
+#endif
+
+		if ((status & (DMA_RX_ERROR | DMA_RX_ERR_LENGTH)) &&
+			(!(status & DMA_RX_LONG))) {
+#if DEBUG_RX
+			printk("%s: rx ERROR %08x\n", __FUNCTION__, status);
+#endif
+			sp->stats.rx_errors++;
+			sp->stats.rx_dropped++;
+
+			/* add statistics counters */
+			if (status & DMA_RX_ERR_CRC)
+				sp->stats.rx_crc_errors++;
+			if (status & DMA_RX_ERR_COL)
+				sp->stats.rx_over_errors++;
+			if (status & DMA_RX_ERR_LENGTH)
+				sp->stats.rx_length_errors++;
+			if (status & DMA_RX_ERR_RUNT)
+				sp->stats.rx_over_errors++;
+			if (status & DMA_RX_ERR_DESC)
+				sp->stats.rx_over_errors++;
+
+		} else {
+			/* alloc new buffer. */
+			skb_new = dev_alloc_skb(AR2313_BUFSIZE + RX_OFFSET + 128);
+			if (skb_new != NULL) {
+
+				skb = sp->rx_skb[idx];
+				/* set skb */
+				skb_put(skb,
+						((status >> DMA_RX_LEN_SHIFT) & 0x3fff) - CRC_LEN);
+
+				sp->stats.rx_bytes += skb->len;
+				skb->protocol = eth_type_trans(skb, dev);
+				/* pass the packet to upper layers */
+				netif_rx(skb);
+
+				skb_new->dev = dev;
+				/* 16 bit align */
+				skb_reserve(skb_new, RX_OFFSET + 32);
+				/* reset descriptor's curr_addr */
+				rxdesc->addr = virt_to_phys(skb_new->data);
+
+				sp->stats.rx_packets++;
+				sp->rx_skb[idx] = skb_new;
+			} else {
+				sp->stats.rx_dropped++;
+			}
+		}
+
+		rxdesc->devcs = ((AR2313_BUFSIZE << DMA_RX1_BSIZE_SHIFT) |
+						 DMA_RX1_CHAINED);
+		rxdesc->status = DMA_RX_OWN;
+
+		idx = DSC_NEXT(idx);
+	}
+
+	sp->cur_rx = idx;
+
+	return rval;
+}
+
+
+static void ar2313_tx_int(struct net_device *dev)
+{
+	struct ar2313_private *sp = dev->priv;
+	u32 idx;
+	struct sk_buff *skb;
+	ar2313_descr_t *txdesc;
+	unsigned int status = 0;
+
+	idx = sp->tx_csm;
+
+	while (idx != sp->tx_prd) {
+
+		txdesc = &sp->tx_ring[idx];
+
+#if DEBUG_TX
+		printk
+			("%s: TXINT: csm=%d idx=%d prd=%d status=%x devcs=%x addr=%08x descr=%x\n",
+			 dev->name, sp->tx_csm, idx, sp->tx_prd, txdesc->status,
+			 txdesc->devcs, txdesc->addr, txdesc->descr);
+#endif							/* DEBUG */
+
+		if ((status = txdesc->status) & DMA_TX_OWN) {
+			/* ar2313 dma still owns descr */
+			break;
+		}
+		/* done with this descriptor */
+		dma_unmap_single(NULL, txdesc->addr,
+						 txdesc->devcs & DMA_TX1_BSIZE_MASK,
+						 DMA_TO_DEVICE);
+		txdesc->status = 0;
+
+		if (status & DMA_TX_ERROR) {
+			sp->stats.tx_errors++;
+			sp->stats.tx_dropped++;
+			if (status & DMA_TX_ERR_UNDER)
+				sp->stats.tx_fifo_errors++;
+			if (status & DMA_TX_ERR_HB)
+				sp->stats.tx_heartbeat_errors++;
+			if (status & (DMA_TX_ERR_LOSS | DMA_TX_ERR_LINK))
+				sp->stats.tx_carrier_errors++;
+			if (status & (DMA_TX_ERR_LATE |
+						  DMA_TX_ERR_COL |
+						  DMA_TX_ERR_JABBER | DMA_TX_ERR_DEFER))
+				sp->stats.tx_aborted_errors++;
+		} else {
+			/* transmit OK */
+			sp->stats.tx_packets++;
+		}
+
+		skb = sp->tx_skb[idx];
+		sp->tx_skb[idx] = NULL;
+		idx = DSC_NEXT(idx);
+		sp->stats.tx_bytes += skb->len;
+		dev_kfree_skb_irq(skb);
+	}
+
+	sp->tx_csm = idx;
+
+	return;
+}
+
+
+static void rx_tasklet_func(unsigned long data)
+{
+	struct net_device *dev = (struct net_device *) data;
+	struct ar2313_private *sp = dev->priv;
+
+	if (sp->unloading) {
+		return;
+	}
+
+	if (ar2313_rx_int(dev)) {
+		tasklet_hi_schedule(&sp->rx_tasklet);
+	} else {
+		unsigned long flags;
+		spin_lock_irqsave(&sp->lock, flags);
+		sp->dma_regs->intr_ena |= DMA_STATUS_RI;
+		spin_unlock_irqrestore(&sp->lock, flags);
+	}
+}
+
+static void rx_schedule(struct net_device *dev)
+{
+	struct ar2313_private *sp = dev->priv;
+
+	sp->dma_regs->intr_ena &= ~DMA_STATUS_RI;
+
+	tasklet_hi_schedule(&sp->rx_tasklet);
+}
+
+static irqreturn_t ar2313_interrupt(int irq, void *dev_id)
+{
+	struct net_device *dev = (struct net_device *) dev_id;
+	struct ar2313_private *sp = dev->priv;
+	unsigned int status, enabled;
+
+	/* clear interrupt */
+	/* 
+	 * Don't clear RI bit if currently disabled.
+	 */
+	status = sp->dma_regs->status;
+	enabled = sp->dma_regs->intr_ena;
+	sp->dma_regs->status = status & enabled;
+
+	if (status & DMA_STATUS_NIS) {
+		/* normal status */
+		/* 
+		 * Don't schedule rx processing if interrupt
+		 * is already disabled.
+		 */
+		if (status & enabled & DMA_STATUS_RI) {
+			/* receive interrupt */
+			rx_schedule(dev);
+		}
+		if (status & DMA_STATUS_TI) {
+			/* transmit interrupt */
+			ar2313_tx_int(dev);
+		}
+	}
+
+	if (status & DMA_STATUS_AIS) {
+#if DEBUG_INT
+		printk("%s: AIS set %08x & %x\n", __FUNCTION__,
+			   status, (DMA_STATUS_FBE | DMA_STATUS_TPS));
+#endif
+		/* abnormal status */
+		if (status & (DMA_STATUS_FBE | DMA_STATUS_TPS)) {
+			ar2313_restart(dev);
+		}
+	}
+	return IRQ_HANDLED;
+}
+
+
+static int ar2313_open(struct net_device *dev)
+{
+	struct ar2313_private *sp;
+
+	sp = dev->priv;
+
+	dev->mtu = 1500;
+	netif_start_queue(dev);
+
+	sp->eth_regs->mac_control |= MAC_CONTROL_RE;
+
+	return 0;
+}
+
+static void ar2313_halt(struct net_device *dev)
+{
+	struct ar2313_private *sp = dev->priv;
+	int j;
+
+	tasklet_disable(&sp->rx_tasklet);
+
+	/* kill the MAC */
+	sp->eth_regs->mac_control &= ~(MAC_CONTROL_RE |	/* disable Receives */
+								   MAC_CONTROL_TE);	/* disable Transmits */
+	/* stop dma */
+	sp->dma_regs->control = 0;
+	sp->dma_regs->bus_mode = DMA_BUS_MODE_SWR;
+
+	/* place phy and MAC in reset */
+	*sp->int_regs |= (sp->cfg->reset_mac | sp->cfg->reset_phy);
+
+	/* free buffers on tx ring */
+	for (j = 0; j < AR2313_DESCR_ENTRIES; j++) {
+		struct sk_buff *skb;
+		ar2313_descr_t *txdesc;
+
+		txdesc = &sp->tx_ring[j];
+		txdesc->descr = 0;
+
+		skb = sp->tx_skb[j];
+		if (skb) {
+			dev_kfree_skb(skb);
+			sp->tx_skb[j] = NULL;
+		}
+	}
+}
+
+/*
+ * close should do nothing. Here's why. It's called when
+ * 'ifconfig bond0 down' is run. If it calls free_irq then
+ * the irq is gone forever ! When bond0 is made 'up' again,
+ * the ar2313_open () does not call request_irq (). Worse,
+ * the call to ar2313_halt() generates a WDOG reset due to
+ * the write to 'sp->int_regs' and the box reboots.
+ * Commenting this out is good since it allows the
+ * system to resume when bond0 is made up again.
+ */
+static int ar2313_close(struct net_device *dev)
+{
+#if 0
+	/* 
+	 * Disable interrupts
+	 */
+	disable_irq(dev->irq);
+
+	/* 
+	 * Without (or before) releasing irq and stopping hardware, this
+	 * is an absolute non-sense, by the way. It will be reset instantly
+	 * by the first irq.
+	 */
+	netif_stop_queue(dev);
+
+	/* stop the MAC and DMA engines */
+	ar2313_halt(dev);
+
+	/* release the interrupt */
+	free_irq(dev->irq, dev);
+
+#endif
+	return 0;
+}
+
+static int ar2313_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct ar2313_private *sp = dev->priv;
+	ar2313_descr_t *td;
+	u32 idx;
+
+	idx = sp->tx_prd;
+	td = &sp->tx_ring[idx];
+
+	if (td->status & DMA_TX_OWN) {
+#if DEBUG_TX
+		printk("%s: No space left to Tx\n", __FUNCTION__);
+#endif
+		/* free skbuf and lie to the caller that we sent it out */
+		sp->stats.tx_dropped++;
+		dev_kfree_skb(skb);
+
+		/* restart transmitter in case locked */
+		sp->dma_regs->xmt_poll = 0;
+		return 0;
+	}
+
+	/* Setup the transmit descriptor. */
+	td->devcs = ((skb->len << DMA_TX1_BSIZE_SHIFT) |
+				 (DMA_TX1_LS | DMA_TX1_IC | DMA_TX1_CHAINED));
+	td->addr = dma_map_single(NULL, skb->data, skb->len, DMA_TO_DEVICE);
+	td->status = DMA_TX_OWN;
+
+	/* kick transmitter last */
+	sp->dma_regs->xmt_poll = 0;
+
+#if DEBUG_TX
+	printk("index %d\n", idx);
+	printk("TX status %08x\n", td->status);
+	printk("TX devcs  %08x\n", td->devcs);
+	printk("TX addr   %08x\n", td->addr);
+	printk("TX descr  %08x\n", td->descr);
+#endif
+
+	sp->tx_skb[idx] = skb;
+	idx = DSC_NEXT(idx);
+	sp->tx_prd = idx;
+
+	return 0;
+}
+
+static int netdev_get_ecmd(struct net_device *dev,
+						   struct ethtool_cmd *ecmd)
+{
+	struct ar2313_private *np = dev->priv;
+	u32 tmp;
+
+	ecmd->supported =
+		(SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
+		 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
+		 SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII);
+
+	ecmd->port = PORT_TP;
+	/* only supports internal transceiver */
+	ecmd->transceiver = XCVR_INTERNAL;
+	/* not sure what this is for */
+	ecmd->phy_address = 1;
+
+	ecmd->advertising = ADVERTISED_MII;
+	tmp = armiiread(dev, np->phy, MII_ADVERTISE);
+	if (tmp & ADVERTISE_10HALF)
+		ecmd->advertising |= ADVERTISED_10baseT_Half;
+	if (tmp & ADVERTISE_10FULL)
+		ecmd->advertising |= ADVERTISED_10baseT_Full;
+	if (tmp & ADVERTISE_100HALF)
+		ecmd->advertising |= ADVERTISED_100baseT_Half;
+	if (tmp & ADVERTISE_100FULL)
+		ecmd->advertising |= ADVERTISED_100baseT_Full;
+
+	tmp = armiiread(dev, np->phy, MII_BMCR);
+	if (tmp & BMCR_ANENABLE) {
+		ecmd->advertising |= ADVERTISED_Autoneg;
+		ecmd->autoneg = AUTONEG_ENABLE;
+	} else {
+		ecmd->autoneg = AUTONEG_DISABLE;
+	}
+
+	if (ecmd->autoneg == AUTONEG_ENABLE) {
+		tmp = armiiread(dev, np->phy, MII_LPA);
+		if (tmp & (LPA_100FULL | LPA_10FULL)) {
+			ecmd->duplex = DUPLEX_FULL;
+		} else {
+			ecmd->duplex = DUPLEX_HALF;
+		}
+		if (tmp & (LPA_100FULL | LPA_100HALF)) {
+			ecmd->speed = SPEED_100;
+		} else {
+			ecmd->speed = SPEED_10;
+		}
+	} else {
+		if (tmp & BMCR_FULLDPLX) {
+			ecmd->duplex = DUPLEX_FULL;
+		} else {
+			ecmd->duplex = DUPLEX_HALF;
+		}
+		if (tmp & BMCR_SPEED100) {
+			ecmd->speed = SPEED_100;
+		} else {
+			ecmd->speed = SPEED_10;
+		}
+	}
+
+	/* ignore maxtxpkt, maxrxpkt for now */
+
+	return 0;
+}
+
+static int netdev_set_ecmd(struct net_device *dev,
+						   struct ethtool_cmd *ecmd)
+{
+	struct ar2313_private *np = dev->priv;
+	u32 tmp;
+
+	if (ecmd->speed != SPEED_10 && ecmd->speed != SPEED_100)
+		return -EINVAL;
+	if (ecmd->duplex != DUPLEX_HALF && ecmd->duplex != DUPLEX_FULL)
+		return -EINVAL;
+	if (ecmd->port != PORT_TP)
+		return -EINVAL;
+	if (ecmd->transceiver != XCVR_INTERNAL)
+		return -EINVAL;
+	if (ecmd->autoneg != AUTONEG_DISABLE
+		&& ecmd->autoneg != AUTONEG_ENABLE)
+		return -EINVAL;
+	/* ignore phy_address, maxtxpkt, maxrxpkt for now */
+
+	/* WHEW! now lets bang some bits */
+
+	tmp = armiiread(dev, np->phy, MII_BMCR);
+	if (ecmd->autoneg == AUTONEG_ENABLE) {
+		/* turn on autonegotiation */
+		tmp |= BMCR_ANENABLE;
+		printk("%s: Enabling auto-neg\n", dev->name);
+	} else {
+		/* turn off auto negotiation, set speed and duplexity */
+		tmp &= ~(BMCR_ANENABLE | BMCR_SPEED100 | BMCR_FULLDPLX);
+		if (ecmd->speed == SPEED_100)
+			tmp |= BMCR_SPEED100;
+		if (ecmd->duplex == DUPLEX_FULL)
+			tmp |= BMCR_FULLDPLX;
+		printk("%s: Hard coding %d/%s\n", dev->name,
+			   (ecmd->speed == SPEED_100) ? 100 : 10,
+			   (ecmd->duplex == DUPLEX_FULL) ? "full" : "half");
+	}
+	armiiwrite(dev, np->phy, MII_BMCR, tmp);
+	np->phyData = 0;
+	return 0;
+}
+
+static int netdev_ethtool_ioctl(struct net_device *dev, void *useraddr)
+{
+	struct ar2313_private *np = dev->priv;
+	u32 cmd;
+
+	if (get_user(cmd, (u32 *) useraddr))
+		return -EFAULT;
+
+	switch (cmd) {
+		/* get settings */
+	case ETHTOOL_GSET:{
+			struct ethtool_cmd ecmd = { ETHTOOL_GSET };
+			spin_lock_irq(&np->lock);
+			netdev_get_ecmd(dev, &ecmd);
+			spin_unlock_irq(&np->lock);
+			if (copy_to_user(useraddr, &ecmd, sizeof(ecmd)))
+				return -EFAULT;
+			return 0;
+		}
+		/* set settings */
+	case ETHTOOL_SSET:{
+			struct ethtool_cmd ecmd;
+			int r;
+			if (copy_from_user(&ecmd, useraddr, sizeof(ecmd)))
+				return -EFAULT;
+			spin_lock_irq(&np->lock);
+			r = netdev_set_ecmd(dev, &ecmd);
+			spin_unlock_irq(&np->lock);
+			return r;
+		}
+		/* restart autonegotiation */
+	case ETHTOOL_NWAY_RST:{
+			int tmp;
+			int r = -EINVAL;
+			/* if autoneg is off, it's an error */
+			tmp = armiiread(dev, np->phy, MII_BMCR);
+			if (tmp & BMCR_ANENABLE) {
+				tmp |= (BMCR_ANRESTART);
+				armiiwrite(dev, np->phy, MII_BMCR, tmp);
+				r = 0;
+			}
+			return r;
+		}
+		/* get link status */
+	case ETHTOOL_GLINK:{
+			struct ethtool_value edata = { ETHTOOL_GLINK };
+			edata.data =
+				(armiiread(dev, np->phy, MII_BMSR) & BMSR_LSTATUS) ? 1 : 0;
+			if (copy_to_user(useraddr, &edata, sizeof(edata)))
+				return -EFAULT;
+			return 0;
+		}
+	}
+
+	return -EOPNOTSUPP;
+}
+
+static int ar2313_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+	struct mii_ioctl_data *data = (struct mii_ioctl_data *) &ifr->ifr_data;
+
+	switch (cmd) {
+
+	case SIOCETHTOOL:
+		return netdev_ethtool_ioctl(dev, (void *) ifr->ifr_data);
+
+	case SIOCGMIIPHY:			/* Get address of MII PHY in use. */
+		data->phy_id = 1;
+		/* Fall Through */
+
+	case SIOCGMIIREG:			/* Read MII PHY register. */
+		data->val_out = armiiread(dev, data->phy_id & 0x1f,
+								  data->reg_num & 0x1f);
+		return 0;
+	case SIOCSMIIREG:			/* Write MII PHY register. */
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		armiiwrite(dev, data->phy_id & 0x1f,
+				   data->reg_num & 0x1f, data->val_in);
+		return 0;
+
+	case SIOCSIFHWADDR:
+		if (copy_from_user
+			(dev->dev_addr, ifr->ifr_data, sizeof(dev->dev_addr)))
+			return -EFAULT;
+		return 0;
+
+	case SIOCGIFHWADDR:
+		if (copy_to_user
+			(ifr->ifr_data, dev->dev_addr, sizeof(dev->dev_addr)))
+			return -EFAULT;
+		return 0;
+
+	default:
+		break;
+	}
+
+	return -EOPNOTSUPP;
+}
+
+static struct net_device_stats *ar2313_get_stats(struct net_device *dev)
+{
+	struct ar2313_private *sp = dev->priv;
+	return &sp->stats;
+}
+
+
+#define MII_ADDR(phy, reg) \
+	((reg << MII_ADDR_REG_SHIFT) | (phy << MII_ADDR_PHY_SHIFT))
+
+static short armiiread(struct net_device *dev, short phy, short reg)
+{
+	struct ar2313_private *sp = (struct ar2313_private *) dev->priv;
+	volatile ETHERNET_STRUCT *ethernet = sp->phy_regs;
+
+	ethernet->mii_addr = MII_ADDR(phy, reg);
+	while (ethernet->mii_addr & MII_ADDR_BUSY);
+	return (ethernet->mii_data >> MII_DATA_SHIFT);
+}
+
+static void
+armiiwrite(struct net_device *dev, short phy, short reg, short data)
+{
+	struct ar2313_private *sp = (struct ar2313_private *) dev->priv;
+	volatile ETHERNET_STRUCT *ethernet = sp->phy_regs;
+
+	while (ethernet->mii_addr & MII_ADDR_BUSY);
+	ethernet->mii_data = data << MII_DATA_SHIFT;
+	ethernet->mii_addr = MII_ADDR(phy, reg) | MII_ADDR_WRITE;
+}
diff --git a/target/linux/atheros/files/drivers/net/ar2313/ar2313.h b/target/linux/atheros/files/drivers/net/ar2313/ar2313.h
new file mode 100644
index 0000000000..c0b3a4f765
--- /dev/null
+++ b/target/linux/atheros/files/drivers/net/ar2313/ar2313.h
@@ -0,0 +1,193 @@
+#ifndef _AR2313_H_
+#define _AR2313_H_
+
+#include <linux/autoconf.h>
+#include <asm/bootinfo.h>
+#include <ar531x_platform.h>
+
+/*
+ * probe link timer - 5 secs
+ */
+#define LINK_TIMER    (5*HZ)
+
+#define IS_DMA_TX_INT(X)   (((X) & (DMA_STATUS_TI)) != 0)
+#define IS_DMA_RX_INT(X)   (((X) & (DMA_STATUS_RI)) != 0)
+#define IS_DRIVER_OWNED(X) (((X) & (DMA_TX_OWN))    == 0)
+
+#define AR2313_TX_TIMEOUT (HZ/4)
+
+/*
+ * Rings
+ */
+#define DSC_RING_ENTRIES_SIZE	(AR2313_DESCR_ENTRIES * sizeof(struct desc))
+#define DSC_NEXT(idx)	        ((idx + 1) & (AR2313_DESCR_ENTRIES - 1))
+
+static inline int tx_space(u32 csm, u32 prd)
+{
+	return (csm - prd - 1) & (AR2313_DESCR_ENTRIES - 1);
+}
+
+#if MAX_SKB_FRAGS
+#define TX_RESERVED	(MAX_SKB_FRAGS+1)	/* +1 for message header */
+#define tx_ring_full(csm, prd)	(tx_space(csm, prd) <= TX_RESERVED)
+#else
+#define tx_ring_full		0
+#endif
+
+#define AR2313_MBGET		2
+#define AR2313_MBSET    	3
+#define AR2313_PCI_RECONFIG	4
+#define AR2313_PCI_DUMP  	5
+#define AR2313_TEST_PANIC	6
+#define AR2313_TEST_NULLPTR	7
+#define AR2313_READ_DATA	8
+#define AR2313_WRITE_DATA	9
+#define AR2313_GET_VERSION	10
+#define AR2313_TEST_HANG	11
+#define AR2313_SYNC		12
+
+
+//
+// New Combo structure for Both Eth0 AND eth1
+//
+typedef struct {
+	volatile unsigned int mac_control;	/* 0x00 */
+	volatile unsigned int mac_addr[2];	/* 0x04 - 0x08 */
+	volatile unsigned int mcast_table[2];	/* 0x0c - 0x10 */
+	volatile unsigned int mii_addr;	/* 0x14 */
+	volatile unsigned int mii_data;	/* 0x18 */
+	volatile unsigned int flow_control;	/* 0x1c */
+	volatile unsigned int vlan_tag;	/* 0x20 */
+	volatile unsigned int pad[7];	/* 0x24 - 0x3c */
+	volatile unsigned int ucast_table[8];	/* 0x40-0x5c */
+
+} ETHERNET_STRUCT;
+
+/********************************************************************
+ * Interrupt controller 
+ ********************************************************************/
+
+typedef struct {
+	volatile unsigned int wdog_control;	/* 0x08 */
+	volatile unsigned int wdog_timer;	/* 0x0c */
+	volatile unsigned int misc_status;	/* 0x10 */
+	volatile unsigned int misc_mask;	/* 0x14 */
+	volatile unsigned int global_status;	/* 0x18 */
+	volatile unsigned int reserved;	/* 0x1c */
+	volatile unsigned int reset_control;	/* 0x20 */
+} INTERRUPT;
+
+/********************************************************************
+ * DMA controller
+ ********************************************************************/
+typedef struct {
+	volatile unsigned int bus_mode;	/* 0x00 (CSR0) */
+	volatile unsigned int xmt_poll;	/* 0x04 (CSR1) */
+	volatile unsigned int rcv_poll;	/* 0x08 (CSR2) */
+	volatile unsigned int rcv_base;	/* 0x0c (CSR3) */
+	volatile unsigned int xmt_base;	/* 0x10 (CSR4) */
+	volatile unsigned int status;	/* 0x14 (CSR5) */
+	volatile unsigned int control;	/* 0x18 (CSR6) */
+	volatile unsigned int intr_ena;	/* 0x1c (CSR7) */
+	volatile unsigned int rcv_missed;	/* 0x20 (CSR8) */
+	volatile unsigned int reserved[11];	/* 0x24-0x4c (CSR9-19) */
+	volatile unsigned int cur_tx_buf_addr;	/* 0x50 (CSR20) */
+	volatile unsigned int cur_rx_buf_addr;	/* 0x50 (CSR21) */
+} DMA;
+
+/*
+ * Struct private for the Sibyte.
+ *
+ * Elements are grouped so variables used by the tx handling goes
+ * together, and will go into the same cache lines etc. in order to
+ * avoid cache line contention between the rx and tx handling on SMP.
+ *
+ * Frequently accessed variables are put at the beginning of the
+ * struct to help the compiler generate better/shorter code.
+ */
+struct ar2313_private {
+	struct net_device *dev;
+	int version;
+	u32 mb[2];
+
+	volatile ETHERNET_STRUCT *phy_regs;
+	volatile ETHERNET_STRUCT *eth_regs;
+	volatile DMA *dma_regs;
+	volatile u32 *int_regs;
+	struct ar531x_eth *cfg;
+
+	spinlock_t lock;			/* Serialise access to device */
+
+	/* 
+	 * RX and TX descriptors, must be adjacent
+	 */
+	ar2313_descr_t *rx_ring;
+	ar2313_descr_t *tx_ring;
+
+
+	struct sk_buff **rx_skb;
+	struct sk_buff **tx_skb;
+
+	/* 
+	 * RX elements
+	 */
+	u32 rx_skbprd;
+	u32 cur_rx;
+
+	/* 
+	 * TX elements
+	 */
+	u32 tx_prd;
+	u32 tx_csm;
+
+	/* 
+	 * Misc elements
+	 */
+	int board_idx;
+	char name[48];
+	struct net_device_stats stats;
+	struct {
+		u32 address;
+		u32 length;
+		char *mapping;
+	} desc;
+
+
+	struct timer_list link_timer;
+	unsigned short phy;			/* merlot phy = 1, samsung phy = 0x1f */
+	unsigned short mac;
+	unsigned short link;		/* 0 - link down, 1 - link up */
+	u16 phyData;
+
+	struct tasklet_struct rx_tasklet;
+	int unloading;
+};
+
+
+/*
+ * Prototypes
+ */
+static int ar2313_init(struct net_device *dev);
+#ifdef TX_TIMEOUT
+static void ar2313_tx_timeout(struct net_device *dev);
+#endif
+#if 0
+static void ar2313_multicast_list(struct net_device *dev);
+#endif
+static int ar2313_restart(struct net_device *dev);
+#if DEBUG
+static void ar2313_dump_regs(struct net_device *dev);
+#endif
+static void ar2313_load_rx_ring(struct net_device *dev, int bufs);
+static irqreturn_t ar2313_interrupt(int irq, void *dev_id);
+static int ar2313_open(struct net_device *dev);
+static int ar2313_start_xmit(struct sk_buff *skb, struct net_device *dev);
+static int ar2313_close(struct net_device *dev);
+static int ar2313_ioctl(struct net_device *dev, struct ifreq *ifr,
+						int cmd);
+static void ar2313_init_cleanup(struct net_device *dev);
+static int ar2313_setup_timer(struct net_device *dev);
+static void ar2313_link_timer_fn(unsigned long data);
+static void ar2313_check_link(struct net_device *dev);
+static struct net_device_stats *ar2313_get_stats(struct net_device *dev);
+#endif							/* _AR2313_H_ */
diff --git a/target/linux/atheros/files/drivers/net/ar2313/dma.h b/target/linux/atheros/files/drivers/net/ar2313/dma.h
new file mode 100644
index 0000000000..113827047b
--- /dev/null
+++ b/target/linux/atheros/files/drivers/net/ar2313/dma.h
@@ -0,0 +1,142 @@
+#ifndef __ARUBA_DMA_H__
+#define __ARUBA_DMA_H__
+
+/*******************************************************************************
+ *
+ * Copyright 2002 Integrated Device Technology, Inc.
+ *		All rights reserved.
+ *
+ * DMA register definition.
+ *
+ * File   : $Id: dma.h,v 1.3 2002/06/06 18:34:03 astichte Exp $
+ *
+ * Author : ryan.holmQVist@idt.com
+ * Date   : 20011005
+ * Update :
+ *	    $Log: dma.h,v $
+ *	    Revision 1.3  2002/06/06 18:34:03  astichte
+ *	    Added XXX_PhysicalAddress and XXX_VirtualAddress
+ *	
+ *	    Revision 1.2  2002/06/05 18:30:46  astichte
+ *	    Removed IDTField
+ *	
+ *	    Revision 1.1  2002/05/29 17:33:21  sysarch
+ *	    jba File moved from vcode/include/idt/acacia
+ *	
+ *
+ ******************************************************************************/
+
+#define AR_BIT(x)            (1 << (x))
+#define DMA_RX_ERR_CRC       AR_BIT(1)
+#define DMA_RX_ERR_DRIB      AR_BIT(2)
+#define DMA_RX_ERR_MII       AR_BIT(3)
+#define DMA_RX_EV2           AR_BIT(5)
+#define DMA_RX_ERR_COL       AR_BIT(6)
+#define DMA_RX_LONG          AR_BIT(7)
+#define DMA_RX_LS            AR_BIT(8)	/* last descriptor */
+#define DMA_RX_FS            AR_BIT(9)	/* first descriptor */
+#define DMA_RX_MF            AR_BIT(10)	/* multicast frame */
+#define DMA_RX_ERR_RUNT      AR_BIT(11)	/* runt frame */
+#define DMA_RX_ERR_LENGTH    AR_BIT(12)	/* length error */
+#define DMA_RX_ERR_DESC      AR_BIT(14)	/* descriptor error */
+#define DMA_RX_ERROR         AR_BIT(15)	/* error summary */
+#define DMA_RX_LEN_MASK      0x3fff0000
+#define DMA_RX_LEN_SHIFT     16
+#define DMA_RX_FILT          AR_BIT(30)
+#define DMA_RX_OWN           AR_BIT(31)	/* desc owned by DMA controller */
+
+#define DMA_RX1_BSIZE_MASK   0x000007ff
+#define DMA_RX1_BSIZE_SHIFT  0
+#define DMA_RX1_CHAINED      AR_BIT(24)
+#define DMA_RX1_RER          AR_BIT(25)
+
+#define DMA_TX_ERR_UNDER     AR_BIT(1)	/* underflow error */
+#define DMA_TX_ERR_DEFER     AR_BIT(2)	/* excessive deferral */
+#define DMA_TX_COL_MASK      0x78
+#define DMA_TX_COL_SHIFT     3
+#define DMA_TX_ERR_HB        AR_BIT(7)	/* hearbeat failure */
+#define DMA_TX_ERR_COL       AR_BIT(8)	/* excessive collisions */
+#define DMA_TX_ERR_LATE      AR_BIT(9)	/* late collision */
+#define DMA_TX_ERR_LINK      AR_BIT(10)	/* no carrier */
+#define DMA_TX_ERR_LOSS      AR_BIT(11)	/* loss of carrier */
+#define DMA_TX_ERR_JABBER    AR_BIT(14)	/* transmit jabber timeout */
+#define DMA_TX_ERROR         AR_BIT(15)	/* frame aborted */
+#define DMA_TX_OWN           AR_BIT(31)	/* descr owned by DMA controller */
+
+#define DMA_TX1_BSIZE_MASK   0x000007ff
+#define DMA_TX1_BSIZE_SHIFT  0
+#define DMA_TX1_CHAINED      AR_BIT(24)	/* chained descriptors */
+#define DMA_TX1_TER          AR_BIT(25)	/* transmit end of ring */
+#define DMA_TX1_FS           AR_BIT(29)	/* first segment */
+#define DMA_TX1_LS           AR_BIT(30)	/* last segment */
+#define DMA_TX1_IC           AR_BIT(31)	/* interrupt on completion */
+
+#define RCVPKT_LENGTH(X)     (X  >> 16)	/* Received pkt Length */
+
+#define MAC_CONTROL_RE       AR_BIT(2)	/* receive enable */
+#define MAC_CONTROL_TE       AR_BIT(3)	/* transmit enable */
+#define MAC_CONTROL_DC       AR_BIT(5)	/* Deferral check */
+#define MAC_CONTROL_ASTP     AR_BIT(8)	/* Auto pad strip */
+#define MAC_CONTROL_DRTY     AR_BIT(10)	/* Disable retry */
+#define MAC_CONTROL_DBF      AR_BIT(11)	/* Disable bcast frames */
+#define MAC_CONTROL_LCC      AR_BIT(12)	/* late collision ctrl */
+#define MAC_CONTROL_HP       AR_BIT(13)	/* Hash Perfect filtering */
+#define MAC_CONTROL_HASH     AR_BIT(14)	/* Unicast hash filtering */
+#define MAC_CONTROL_HO       AR_BIT(15)	/* Hash only filtering */
+#define MAC_CONTROL_PB       AR_BIT(16)	/* Pass Bad frames */
+#define MAC_CONTROL_IF       AR_BIT(17)	/* Inverse filtering */
+#define MAC_CONTROL_PR       AR_BIT(18)	/* promiscuous mode (valid frames
+										   only) */
+#define MAC_CONTROL_PM       AR_BIT(19)	/* pass multicast */
+#define MAC_CONTROL_F        AR_BIT(20)	/* full-duplex */
+#define MAC_CONTROL_DRO      AR_BIT(23)	/* Disable Receive Own */
+#define MAC_CONTROL_HBD      AR_BIT(28)	/* heart-beat disabled (MUST BE
+										   SET) */
+#define MAC_CONTROL_BLE      AR_BIT(30)	/* big endian mode */
+#define MAC_CONTROL_RA       AR_BIT(31)	/* receive all (valid and invalid
+										   frames) */
+
+#define MII_ADDR_BUSY        AR_BIT(0)
+#define MII_ADDR_WRITE       AR_BIT(1)
+#define MII_ADDR_REG_SHIFT   6
+#define MII_ADDR_PHY_SHIFT   11
+#define MII_DATA_SHIFT       0
+
+#define FLOW_CONTROL_FCE     AR_BIT(1)
+
+#define DMA_BUS_MODE_SWR       AR_BIT(0)	/* software reset */
+#define DMA_BUS_MODE_BLE       AR_BIT(7)	/* big endian mode */
+#define DMA_BUS_MODE_PBL_SHIFT 8	/* programmable burst length 32 */
+#define DMA_BUS_MODE_DBO       AR_BIT(20)	/* big-endian descriptors */
+
+#define DMA_STATUS_TI        AR_BIT(0)	/* transmit interrupt */
+#define DMA_STATUS_TPS       AR_BIT(1)	/* transmit process stopped */
+#define DMA_STATUS_TU        AR_BIT(2)	/* transmit buffer unavailable */
+#define DMA_STATUS_TJT       AR_BIT(3)	/* transmit buffer timeout */
+#define DMA_STATUS_UNF       AR_BIT(5)	/* transmit underflow */
+#define DMA_STATUS_RI        AR_BIT(6)	/* receive interrupt */
+#define DMA_STATUS_RU        AR_BIT(7)	/* receive buffer unavailable */
+#define DMA_STATUS_RPS       AR_BIT(8)	/* receive process stopped */
+#define DMA_STATUS_ETI       AR_BIT(10)	/* early transmit interrupt */
+#define DMA_STATUS_FBE       AR_BIT(13)	/* fatal bus interrupt */
+#define DMA_STATUS_ERI       AR_BIT(14)	/* early receive interrupt */
+#define DMA_STATUS_AIS       AR_BIT(15)	/* abnormal interrupt summary */
+#define DMA_STATUS_NIS       AR_BIT(16)	/* normal interrupt summary */
+#define DMA_STATUS_RS_SHIFT  17	/* receive process state */
+#define DMA_STATUS_TS_SHIFT  20	/* transmit process state */
+#define DMA_STATUS_EB_SHIFT  23	/* error bits */
+
+#define DMA_CONTROL_SR       AR_BIT(1)	/* start receive */
+#define DMA_CONTROL_ST       AR_BIT(13)	/* start transmit */
+#define DMA_CONTROL_SF       AR_BIT(21)	/* store and forward */
+
+
+typedef struct {
+	volatile unsigned int status;	// OWN, Device control and status.
+	volatile unsigned int devcs;	// pkt Control bits + Length
+	volatile unsigned int addr;	// Current Address.
+	volatile unsigned int descr;	// Next descriptor in chain.
+} ar2313_descr_t;
+
+
+#endif							// __ARUBA_DMA_H__