diff options
Diffstat (limited to 'target/linux/atheros-2.6/files/drivers/net/ar2313/ar2313.c')
| -rw-r--r-- | target/linux/atheros-2.6/files/drivers/net/ar2313/ar2313.c | 1545 |
1 files changed, 1545 insertions, 0 deletions
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); +} + |