update atheros 2.6 port - add support for the older chip generation

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6265 3c298f89-4303-0410-b956-a3cf2f4a3e73

6 files changed, 2021 insertions, 0 deletions

diff --git a/target/linux/atheros-2.6/files/drivers/net/ar2313/Makefile b/target/linux/atheros-2.6/files/drivers/net/ar2313/Makefile
new file mode 100644
index 0000000000..9eb63e46b6
--- /dev/null
+++ b/target/linux/atheros-2.6/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-2.6/files/drivers/net/ar2313/ar2313.c b/target/linux/atheros-2.6/files/drivers/net/ar2313/ar2313.c
new file mode 100644
index 0000000000..82e9e94d5c
--- /dev/null
+++ b/target/linux/atheros-2.6/files/drivers/net/ar2313/ar2313.c
@@ -0,0 +1,1545 @@
+/*
+ * ar2313.c: Linux driver for the Atheros AR231z Ethernet device.
+ *
+ * Copyright (C) 2004 by Sameer Dekate <sdekate@arubanetworks.com>
+ * Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org>
+ * Copyright (C) 2006 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>
+
+#include <ar531x_platform.h>
+
+#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
+
+#ifndef SET_MODULE_OWNER
+#define SET_MODULE_OWNER(dev)		{do{} while(0);}
+#define AR2313_MOD_INC_USE_COUNT	MOD_INC_USE_COUNT
+#define AR2313_MOD_DEC_USE_COUNT	MOD_DEC_USE_COUNT
+#else
+#define AR2313_MOD_INC_USE_COUNT	{do{} while(0);}
+#define AR2313_MOD_DEC_USE_COUNT	{do{} while(0);}
+#endif
+
+#define PHYSADDR(a)		((_ACAST32_ (a)) & 0x1fffffff)
+
+static char ifname[5] = "bond";
+
+module_param_string(ifname, ifname, 5, 0);
+
+#define AR2313_MBOX_SET_BIT  0x8
+
+#define BOARD_IDX_STATIC	0
+#define BOARD_IDX_OVERFLOW	-1
+
+#include "ar2313_msg.h"
+#include "platform.h"
+#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_AUTHOR("Sameer Dekate <sdekate@arubanetworks.com>, Imre Kaloz <kaloz@openwrt.org>, Felix Fietkau <nbd@openwrt.org>");
+MODULE_DESCRIPTION("AR2313 Ethernet driver");
+#endif
+
+#if DEBUG
+static char version[] __initdata = 
+  "ar2313.c: v0.03 2006/07/12  sdekate@arubanetworks.com\n";
+#endif /* DEBUG */
+
+#define virt_to_phys(x) ((u32)(x) & 0x1fffffff)
+
+// prototypes
+static short armiiread(short phy, short reg);
+static void armiiwrite(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);
+
+static int probed __initdata = 0;
+static unsigned long ar_eth_base;
+static unsigned long ar_dma_base;
+static unsigned long ar_int_base;
+static unsigned long ar_int_mac_mask;
+static unsigned long ar_int_phy_mask;
+
+#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 ar531x_eth *cfg;
+	struct resource *res;
+	int version_disp;
+	char name[64] ;
+
+	if (probed)
+	    return -ENODEV;
+	probed++;
+
+	version_disp = 0;
+	sprintf(name, "%s%%d", ifname) ;
+	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;
+	cfg = pdev->dev.platform_data;
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "eth_membase");
+	if (!res)
+		return -ENODEV;
+	
+	sp->link = 0;
+	ar_eth_base = res->start;
+	ar_dma_base = ar_eth_base + 0x1000;
+	ar_int_base = cfg->reset_base;
+	ar_int_mac_mask = cfg->reset_mac;
+	ar_int_phy_mask = cfg->reset_phy;
+	sp->phy = cfg->phy;
+
+	dev->irq = platform_get_irq_byname(pdev, "eth_irq");
+
+	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);
+
+	/* display version info if adapter is found */
+	if (!version_disp) {
+	    /* set display flag to TRUE so that */
+	    /* we only display this string ONCE */
+	version_disp = 1;
+#if DEBUG
+	printk(version);
+#endif /* DEBUG */
+	}
+
+#if 0
+	request_region(PHYSADDR(ar_eth_base), ETHERNET_SIZE*ETHERNET_MACS,
+	               "AR2313ENET");
+#endif
+
+	sp->eth_regs = ioremap_nocache(PHYSADDR(ar_eth_base), sizeof(*sp->eth_regs));
+	if (!sp->eth_regs) {
+		printk("Can't remap eth registers\n");
+		return(-ENXIO);
+	}
+
+	sp->dma_regs = ioremap_nocache(PHYSADDR(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(PHYSADDR(ar_int_base), 4);
+	if (!sp->int_regs) {
+		printk("Can't remap INTERRUPT registers\n");
+		return(-ENXIO);
+	}
+
+	strncpy(sp->name, "Atheros AR2313", sizeof (sp->name) - 1);
+	sp->name [sizeof (sp->name) - 1] = '\0';
+
+	{
+		/* XXX: Will have to rewrite this part later */
+		char *configstart;
+		unsigned char def_mac[6] = {0, 0xaa, 0xbb, 0xcc, 0xdd, 0xee};
+
+		configstart = (char *) cfg->board_config;
+
+		if (!configstart) {
+			printk("no valid mac found, using defaults");
+			memcpy(dev->dev_addr, def_mac, 6);
+		} else {
+			memcpy(dev->dev_addr, ((u8 *)configstart)+102, 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  = K1_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(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(sp->phy, MII_BMCR);
+	        if (reg & BMCR_ANENABLE) {
+	            /* auto neg enabled */
+	            reg = armiiread(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 |= ar_int_mac_mask;
+	mdelay(10);
+	*sp->int_regs &= ~ar_int_mac_mask;
+	mdelay(10);
+	*sp->int_regs |= ar_int_phy_mask;
+	mdelay(10);
+	*sp->int_regs &= ~ar_int_phy_mask;
+	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 = K1_TO_PHYS(sp->tx_ring);
+	sp->dma_regs->rcv_base = K1_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);
+
+#ifdef CONFIG_MERLOT
+		if ((dev->am_pkt_handler == NULL) || 
+	                (dev->am_pkt_handler(skb, dev) == 0)) {
+#endif
+	              sp->stats.rx_bytes += skb->len;
+	              skb->protocol = eth_type_trans(skb, dev);
+	              /* pass the packet to upper layers */
+
+#ifdef CONFIG_MERLOT
+	              if (dev->asap_netif_rx)
+	                  dev->asap_netif_rx(skb);
+	              else
+#endif
+	              netif_rx(skb);
+#ifdef CONFIG_MERLOT
+		}
+#endif
+		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;
+
+	AR2313_MOD_INC_USE_COUNT;
+
+	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 |= (ar_int_mac_mask | ar_int_phy_mask);
+
+	/* 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
+	AR2313_MOD_DEC_USE_COUNT;
+	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;
+
+	//dev->trans_start = jiffies;
+
+	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(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(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(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(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(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(np->phy, MII_BMCR);
+		if (tmp & BMCR_ANENABLE) {
+			tmp |= (BMCR_ANRESTART);
+			armiiwrite(np->phy, MII_BMCR, tmp);
+			r = 0;
+		}
+		return r;
+	}
+	/* get link status */
+	case ETHTOOL_GLINK: {
+		struct ethtool_value edata = {ETHTOOL_GLINK};
+		edata.data = (armiiread(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 SIOCDEVPRIVATE: {
+	    struct ar2313_cmd scmd;
+
+	    if (copy_from_user(&scmd, ifr->ifr_data, sizeof(scmd)))
+	    return -EFAULT;
+
+#if DEBUG
+	printk("%s: ioctl devprivate c=%d a=%x l=%d m=%d d=%x,%x\n",
+	       dev->name, scmd.cmd,
+	       scmd.address, scmd.length,
+	       scmd.mailbox, scmd.data[0], scmd.data[1]);
+#endif /* DEBUG */
+
+	switch (scmd.cmd) {
+	case AR2313_READ_DATA:
+	    if(scmd.length==4){
+		scmd.data[0] = *((u32*)scmd.address);
+	    } else if(scmd.length==2) {
+		scmd.data[0] = *((u16*)scmd.address);
+	    } else if (scmd.length==1) {
+		scmd.data[0] = *((u8*)scmd.address);
+	    } else {
+		return -EOPNOTSUPP;
+	    }
+	    if(copy_to_user(ifr->ifr_data, &scmd, sizeof(scmd)))
+	        return -EFAULT;
+	    break;
+
+	case AR2313_WRITE_DATA:
+	    if(scmd.length==4){
+		*((u32*)scmd.address) = scmd.data[0];
+	    } else if(scmd.length==2) {
+		*((u16*)scmd.address) = scmd.data[0];
+	    } else if (scmd.length==1) {
+		*((u8*)scmd.address) = scmd.data[0];
+	    } else {
+		return -EOPNOTSUPP;
+	    }
+	    break;
+
+	case AR2313_GET_VERSION:
+	    // SAMEER: sprintf((char*) &scmd, "%s", ARUBA_VERSION);
+	    if(copy_to_user(ifr->ifr_data, &scmd, sizeof(scmd)))
+	        return -EFAULT;
+	    break;
+
+	default:
+	    return -EOPNOTSUPP;
+	}
+	return 0;
+	}
+	  
+	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. */
+	case SIOCDEVPRIVATE+1:	/* for binary compat, remove in 2.5 */
+	    data->val_out = armiiread(data->phy_id & 0x1f, 
+	                              data->reg_num & 0x1f);
+	    return 0;
+	case SIOCSMIIREG:		/* Write MII PHY register. */
+	case SIOCDEVPRIVATE+2:	/* for binary compat, remove in 2.5 */
+	    if (!capable(CAP_NET_ADMIN))
+	        return -EPERM;
+	    armiiwrite(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;
+}
+
+static short
+armiiread(short phy, short reg)
+{
+  volatile ETHERNET_STRUCT * ethernet;
+
+  ethernet = (volatile ETHERNET_STRUCT *)(ar_eth_base); /* always MAC 0 */
+  ethernet->mii_addr = ((reg << MII_ADDR_REG_SHIFT) |
+	                    (phy << MII_ADDR_PHY_SHIFT));
+  while (ethernet->mii_addr & MII_ADDR_BUSY);
+  return (ethernet->mii_data >> MII_DATA_SHIFT);
+}
+
+static void
+armiiwrite(short phy, short reg, short data)
+{
+  volatile ETHERNET_STRUCT * ethernet;
+
+  ethernet = (volatile ETHERNET_STRUCT *)(ar_eth_base); /* always MAC 0 */
+  while (ethernet->mii_addr & MII_ADDR_BUSY);
+  ethernet->mii_data = data << MII_DATA_SHIFT;
+  ethernet->mii_addr = ((reg << MII_ADDR_REG_SHIFT) |
+	                    (phy << MII_ADDR_PHY_SHIFT) |
+	                    MII_ADDR_WRITE);
+}
+
diff --git a/target/linux/atheros-2.6/files/drivers/net/ar2313/ar2313.h b/target/linux/atheros-2.6/files/drivers/net/ar2313/ar2313.h
new file mode 100644
index 0000000000..3606bd7a2a
--- /dev/null
+++ b/target/linux/atheros-2.6/files/drivers/net/ar2313/ar2313.h
@@ -0,0 +1,191 @@
+#ifndef _AR2313_H_
+#define _AR2313_H_
+
+#include <linux/autoconf.h>
+#include <asm/bootinfo.h>
+#include "platform.h"
+
+extern unsigned long mips_machtype;
+
+#undef ETHERNET_BASE
+#define ETHERNET_BASE ar_eth_base
+#define ETHERNET_SIZE 0x00100000
+#define ETHERNET_MACS 2
+
+#undef DMA_BASE
+#define DMA_BASE      ar_dma_base
+#define DMA_SIZE      0x00100000
+
+
+/*
+ * probe link timer - 5 secs
+ */
+#define LINK_TIMER    (5*HZ) 
+
+/*
+ * Interrupt register base address
+ */
+#define INTERRUPT_BASE    PHYS_TO_K1(ar_int_base)
+
+/*
+ * Reset Register
+ */
+#define AR531X_RESET    (AR531X_RESETTMR + 0x0020)
+#define RESET_SYSTEM         0x00000001      /* cold reset full system */
+#define RESET_PROC           0x00000002      /* cold reset MIPS core */
+#define RESET_WLAN0          0x00000004      /* cold reset WLAN MAC and BB */
+#define RESET_EPHY0          0x00000008      /* cold reset ENET0 phy */
+#define RESET_EPHY1          0x00000010      /* cold reset ENET1 phy */
+#define RESET_ENET0          0x00000020      /* cold reset ENET0 mac */
+#define RESET_ENET1          0x00000040      /* cold reset ENET1 mac */
+
+#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)
+
+#ifndef K1_TO_PHYS
+// hack
+#define K1_TO_PHYS(x)   (((unsigned int)(x)) & 0x1FFFFFFF)        /* kseg1 to physical */
+#endif
+
+#ifndef PHYS_TO_K1
+// hack
+#define  PHYS_TO_K1(x)   (((unsigned int)(x)) | 0xA0000000)   /* physical to kseg1 */
+#endif
+
+#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
+
+
+struct ar2313_cmd {
+	u32	cmd;
+	u32     address;      /* virtual address of image */
+	u32     length;       /* size of image to download */
+	u32     mailbox;      /* mailbox to get/set */
+	u32     data[2];      /* contents of mailbox to read/write */
+};
+
+
+/*
+ * 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	*eth_regs;
+	volatile DMA			*dma_regs;
+	volatile u32		        *int_regs;
+
+	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-2.6/files/drivers/net/ar2313/ar2313_msg.h b/target/linux/atheros-2.6/files/drivers/net/ar2313/ar2313_msg.h
new file mode 100644
index 0000000000..d10d9eadee
--- /dev/null
+++ b/target/linux/atheros-2.6/files/drivers/net/ar2313/ar2313_msg.h
@@ -0,0 +1,17 @@
+#ifndef _AR2313_MSG_H_
+#define _AR2313_MSG_H_
+
+#define AR2313_MTU                     1692
+#define AR2313_PRIOS                   1
+#define AR2313_QUEUES                  (2*AR2313_PRIOS)
+
+#define AR2313_DESCR_ENTRIES           64
+
+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 /* _AR2313_MSG_H_ */
diff --git a/target/linux/atheros-2.6/files/drivers/net/ar2313/dma.h b/target/linux/atheros-2.6/files/drivers/net/ar2313/dma.h
new file mode 100644
index 0000000000..2f8c06af50
--- /dev/null
+++ b/target/linux/atheros-2.6/files/drivers/net/ar2313/dma.h
@@ -0,0 +1,135 @@
+#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 */
+
+#endif	// __ARUBA_DMA_H__
+
+
+
+
+
diff --git a/target/linux/atheros-2.6/files/drivers/net/ar2313/platform.h b/target/linux/atheros-2.6/files/drivers/net/ar2313/platform.h
new file mode 100644
index 0000000000..67d8f5c08c
--- /dev/null
+++ b/target/linux/atheros-2.6/files/drivers/net/ar2313/platform.h
@@ -0,0 +1,128 @@
+/********************************************************************************
+   Title:   $Source: platform.h,v $
+
+   Author:  Dan Steinberg
+            Copyright Integrated Device Technology 2001
+
+   Purpose: AR2313 Register/Bit Definitions
+   
+   Update:
+            $Log: platform.h,v $
+      
+   Notes:   See Merlot architecture spec for complete details.  Note, all
+            addresses are virtual addresses in kseg1 (Uncached, Unmapped).
+ 
+********************************************************************************/
+
+#ifndef PLATFORM_H
+#define PLATFORM_H
+
+#define BIT(x) (1 << (x))
+
+#define RESET_BASE        0xBC003020
+#define RESET_VALUE       0x00000001
+
+/********************************************************************
+ * Device controller 
+ ********************************************************************/
+typedef struct {
+  volatile unsigned int flash0;
+} DEVICE;
+
+#define device (*((volatile DEVICE *) DEV_CTL_BASE))
+
+// DDRC register
+#define DEV_WP        (1<<26)
+
+/********************************************************************
+ * DDR controller 
+ ********************************************************************/
+typedef struct {
+  volatile unsigned int ddrc0;
+  volatile unsigned int ddrc1;
+  volatile unsigned int ddrrefresh;
+} DDR;
+
+#define ddr (*((volatile DDR *) DDR_BASE))
+
+// DDRC register
+#define DDRC_CS(i)     ((i&0x3)<<0)
+#define DDRC_WE        (1<<2)
+
+/********************************************************************
+ * Ethernet interfaces
+ ********************************************************************/
+#define ETHERNET_BASE    0xB8200000
+
+//
+// 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;
+
+#define interrupt (*((volatile INTERRUPT *) INTERRUPT_BASE))
+
+#define INTERRUPT_MISC_TIMER    BIT(0)
+#define INTERRUPT_MISC_AHBPROC  BIT(1)
+#define INTERRUPT_MISC_AHBDMA   BIT(2)
+#define INTERRUPT_MISC_GPIO     BIT(3)
+#define INTERRUPT_MISC_UART     BIT(4)
+#define INTERRUPT_MISC_UARTDMA  BIT(5)
+#define INTERRUPT_MISC_WATCHDOG BIT(6)
+#define INTERRUPT_MISC_LOCAL    BIT(7)
+
+#define INTERRUPT_GLOBAL_ETH    BIT(2)
+#define INTERRUPT_GLOBAL_WLAN   BIT(3)
+#define INTERRUPT_GLOBAL_MISC   BIT(4)
+#define INTERRUPT_GLOBAL_ITIMER BIT(5)
+
+/********************************************************************
+ * DMA controller
+ ********************************************************************/
+#define DMA_BASE          0xB8201000
+
+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;
+
+#define dma (*((volatile DMA *) DMA_BASE))
+
+// macro to convert from virtual to physical address  
+#define phys_addr(x)      (x & 0x1fffffff) 
+
+#endif /* PLATFORM_H */