1 files changed, 767 insertions, 0 deletions

diff --git a/drivers/net/ethernet/amd/am79c961a.c b/drivers/net/ethernet/amd/am79c961a.c
new file mode 100644
index 000000000000..52fe21e1e2cd
--- /dev/null
+++ b/drivers/net/ethernet/amd/am79c961a.c
@@ -0,0 +1,767 @@
+/*
+ *  linux/drivers/net/am79c961.c
+ *
+ *  by Russell King <rmk@arm.linux.org.uk> 1995-2001.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Derived from various things including skeleton.c
+ *
+ * This is a special driver for the am79c961A Lance chip used in the
+ * Intel (formally Digital Equipment Corp) EBSA110 platform.  Please
+ * note that this can not be built as a module (it doesn't make sense).
+ */
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/crc32.h>
+#include <linux/bitops.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+
+#include <mach/hardware.h>
+#include <asm/system.h>
+
+#define TX_BUFFERS 15
+#define RX_BUFFERS 25
+
+#include "am79c961a.h"
+
+static irqreturn_t
+am79c961_interrupt (int irq, void *dev_id);
+
+static unsigned int net_debug = NET_DEBUG;
+
+static const char version[] =
+        "am79c961 ethernet driver (C) 1995-2001 Russell King v0.04\n";
+
+/* --------------------------------------------------------------------------- */
+
+#ifdef __arm__
+static void write_rreg(u_long base, u_int reg, u_int val)
+{
+        asm volatile(
+        "str%?h %1, [%2]        @ NET_RAP\n\t"
+        "str%?h %0, [%2, #-4]   @ NET_RDP"
+        :
+        : "r" (val), "r" (reg), "r" (ISAIO_BASE + 0x0464));
+}
+
+static inline unsigned short read_rreg(u_long base_addr, u_int reg)
+{
+        unsigned short v;
+        asm volatile(
+        "str%?h %1, [%2]        @ NET_RAP\n\t"
+        "ldr%?h %0, [%2, #-4]   @ NET_RDP"
+        : "=r" (v)
+        : "r" (reg), "r" (ISAIO_BASE + 0x0464));
+        return v;
+}
+
+static inline void write_ireg(u_long base, u_int reg, u_int val)
+{
+        asm volatile(
+        "str%?h %1, [%2]        @ NET_RAP\n\t"
+        "str%?h %0, [%2, #8]    @ NET_IDP"
+        :
+        : "r" (val), "r" (reg), "r" (ISAIO_BASE + 0x0464));
+}
+
+static inline unsigned short read_ireg(u_long base_addr, u_int reg)
+{
+        u_short v;
+        asm volatile(
+        "str%?h %1, [%2]        @ NAT_RAP\n\t"
+        "ldr%?h %0, [%2, #8]    @ NET_IDP\n\t"
+        : "=r" (v)
+        : "r" (reg), "r" (ISAIO_BASE + 0x0464));
+        return v;
+}
+
+#define am_writeword(dev,off,val) __raw_writew(val, ISAMEM_BASE + ((off) << 1))
+#define am_readword(dev,off)      __raw_readw(ISAMEM_BASE + ((off) << 1))
+
+static void
+am_writebuffer(struct net_device *dev, u_int offset, unsigned char *buf, unsigned int length)
+{
+        offset = ISAMEM_BASE + (offset << 1);
+        length = (length + 1) & ~1;
+        if ((int)buf & 2) {
+                asm volatile("str%?h    %2, [%0], #4"
+                 : "=&r" (offset) : "0" (offset), "r" (buf[0] | (buf[1] << 8)));
+                buf += 2;
+                length -= 2;
+        }
+        while (length > 8) {
+                register unsigned int tmp asm("r2"), tmp2 asm("r3");
+                asm volatile(
+                        "ldm%?ia        %0!, {%1, %2}"
+                        : "+r" (buf), "=&r" (tmp), "=&r" (tmp2));
+                length -= 8;
+                asm volatile(
+                        "str%?h %1, [%0], #4\n\t"
+                        "mov%?  %1, %1, lsr #16\n\t"
+                        "str%?h %1, [%0], #4\n\t"
+                        "str%?h %2, [%0], #4\n\t"
+                        "mov%?  %2, %2, lsr #16\n\t"
+                        "str%?h %2, [%0], #4"
+                : "+r" (offset), "=&r" (tmp), "=&r" (tmp2));
+        }
+        while (length > 0) {
+                asm volatile("str%?h    %2, [%0], #4"
+                 : "=&r" (offset) : "0" (offset), "r" (buf[0] | (buf[1] << 8)));
+                buf += 2;
+                length -= 2;
+        }
+}
+
+static void
+am_readbuffer(struct net_device *dev, u_int offset, unsigned char *buf, unsigned int length)
+{
+        offset = ISAMEM_BASE + (offset << 1);
+        length = (length + 1) & ~1;
+        if ((int)buf & 2) {
+                unsigned int tmp;
+                asm volatile(
+                        "ldr%?h %2, [%0], #4\n\t"
+                        "str%?b %2, [%1], #1\n\t"
+                        "mov%?  %2, %2, lsr #8\n\t"
+                        "str%?b %2, [%1], #1"
+                : "=&r" (offset), "=&r" (buf), "=r" (tmp): "0" (offset), "1" (buf));
+                length -= 2;
+        }
+        while (length > 8) {
+                register unsigned int tmp asm("r2"), tmp2 asm("r3"), tmp3;
+                asm volatile(
+                        "ldr%?h %2, [%0], #4\n\t"
+                        "ldr%?h %4, [%0], #4\n\t"
+                        "ldr%?h %3, [%0], #4\n\t"
+                        "orr%?  %2, %2, %4, lsl #16\n\t"
+                        "ldr%?h %4, [%0], #4\n\t"
+                        "orr%?  %3, %3, %4, lsl #16\n\t"
+                        "stm%?ia        %1!, {%2, %3}"
+                : "=&r" (offset), "=&r" (buf), "=r" (tmp), "=r" (tmp2), "=r" (tmp3)
+                : "0" (offset), "1" (buf));
+                length -= 8;
+        }
+        while (length > 0) {
+                unsigned int tmp;
+                asm volatile(
+                        "ldr%?h %2, [%0], #4\n\t"
+                        "str%?b %2, [%1], #1\n\t"
+                        "mov%?  %2, %2, lsr #8\n\t"
+                        "str%?b %2, [%1], #1"
+                : "=&r" (offset), "=&r" (buf), "=r" (tmp) : "0" (offset), "1" (buf));
+                length -= 2;
+        }
+}
+#else
+#error Not compatible
+#endif
+
+static int
+am79c961_ramtest(struct net_device *dev, unsigned int val)
+{
+        unsigned char *buffer = kmalloc (65536, GFP_KERNEL);
+        int i, error = 0, errorcount = 0;
+
+        if (!buffer)
+                return 0;
+        memset (buffer, val, 65536);
+        am_writebuffer(dev, 0, buffer, 65536);
+        memset (buffer, val ^ 255, 65536);
+        am_readbuffer(dev, 0, buffer, 65536);
+        for (i = 0; i < 65536; i++) {
+                if (buffer[i] != val && !error) {
+                        printk ("%s: buffer error (%02X %02X) %05X - ", dev->name, val, buffer[i], i);
+                        error = 1;
+                        errorcount ++;
+                } else if (error && buffer[i] == val) {
+                        printk ("%05X\n", i);
+                        error = 0;
+                }
+        }
+        if (error)
+                printk ("10000\n");
+        kfree (buffer);
+        return errorcount;
+}
+
+static void am79c961_mc_hash(char *addr, u16 *hash)
+{
+        int idx, bit;
+        u32 crc;
+
+        crc = ether_crc_le(ETH_ALEN, addr);
+
+        idx = crc >> 30;
+        bit = (crc >> 26) & 15;
+
+        hash[idx] |= 1 << bit;
+}
+
+static unsigned int am79c961_get_rx_mode(struct net_device *dev, u16 *hash)
+{
+        unsigned int mode = MODE_PORT_10BT;
+
+        if (dev->flags & IFF_PROMISC) {
+                mode |= MODE_PROMISC;
+                memset(hash, 0xff, 4 * sizeof(*hash));
+        } else if (dev->flags & IFF_ALLMULTI) {
+                memset(hash, 0xff, 4 * sizeof(*hash));
+        } else {
+                struct netdev_hw_addr *ha;
+
+                memset(hash, 0, 4 * sizeof(*hash));
+
+                netdev_for_each_mc_addr(ha, dev)
+                        am79c961_mc_hash(ha->addr, hash);
+        }
+
+        return mode;
+}
+
+static void
+am79c961_init_for_open(struct net_device *dev)
+{
+        struct dev_priv *priv = netdev_priv(dev);
+        unsigned long flags;
+        unsigned char *p;
+        u_int hdr_addr, first_free_addr;
+        u16 multi_hash[4], mode = am79c961_get_rx_mode(dev, multi_hash);
+        int i;
+
+        /*
+         * Stop the chip.
+         */
+        spin_lock_irqsave(&priv->chip_lock, flags);
+        write_rreg (dev->base_addr, CSR0, CSR0_BABL|CSR0_CERR|CSR0_MISS|CSR0_MERR|CSR0_TINT|CSR0_RINT|CSR0_STOP);
+        spin_unlock_irqrestore(&priv->chip_lock, flags);
+
+        write_ireg (dev->base_addr, 5, 0x00a0); /* Receive address LED */
+        write_ireg (dev->base_addr, 6, 0x0081); /* Collision LED */
+        write_ireg (dev->base_addr, 7, 0x0090); /* XMIT LED */
+        write_ireg (dev->base_addr, 2, 0x0000); /* MODE register selects media */
+
+        for (i = LADRL; i <= LADRH; i++)
+                write_rreg (dev->base_addr, i, multi_hash[i - LADRL]);
+
+        for (i = PADRL, p = dev->dev_addr; i <= PADRH; i++, p += 2)
+                write_rreg (dev->base_addr, i, p[0] | (p[1] << 8));
+
+        write_rreg (dev->base_addr, MODE, mode);
+        write_rreg (dev->base_addr, POLLINT, 0);
+        write_rreg (dev->base_addr, SIZERXR, -RX_BUFFERS);
+        write_rreg (dev->base_addr, SIZETXR, -TX_BUFFERS);
+
+        first_free_addr = RX_BUFFERS * 8 + TX_BUFFERS * 8 + 16;
+        hdr_addr = 0;
+
+        priv->rxhead = 0;
+        priv->rxtail = 0;
+        priv->rxhdr = hdr_addr;
+
+        for (i = 0; i < RX_BUFFERS; i++) {
+                priv->rxbuffer[i] = first_free_addr;
+                am_writeword (dev, hdr_addr, first_free_addr);
+                am_writeword (dev, hdr_addr + 2, RMD_OWN);
+                am_writeword (dev, hdr_addr + 4, (-1600));
+                am_writeword (dev, hdr_addr + 6, 0);
+                first_free_addr += 1600;
+                hdr_addr += 8;
+        }
+        priv->txhead = 0;
+        priv->txtail = 0;
+        priv->txhdr = hdr_addr;
+        for (i = 0; i < TX_BUFFERS; i++) {
+                priv->txbuffer[i] = first_free_addr;
+                am_writeword (dev, hdr_addr, first_free_addr);
+                am_writeword (dev, hdr_addr + 2, TMD_STP|TMD_ENP);
+                am_writeword (dev, hdr_addr + 4, 0xf000);
+                am_writeword (dev, hdr_addr + 6, 0);
+                first_free_addr += 1600;
+                hdr_addr += 8;
+        }
+
+        write_rreg (dev->base_addr, BASERXL, priv->rxhdr);
+        write_rreg (dev->base_addr, BASERXH, 0);
+        write_rreg (dev->base_addr, BASETXL, priv->txhdr);
+        write_rreg (dev->base_addr, BASERXH, 0);
+        write_rreg (dev->base_addr, CSR0, CSR0_STOP);
+        write_rreg (dev->base_addr, CSR3, CSR3_IDONM|CSR3_BABLM|CSR3_DXSUFLO);
+        write_rreg (dev->base_addr, CSR4, CSR4_APAD_XMIT|CSR4_MFCOM|CSR4_RCVCCOM|CSR4_TXSTRTM|CSR4_JABM);
+        write_rreg (dev->base_addr, CSR0, CSR0_IENA|CSR0_STRT);
+}
+
+static void am79c961_timer(unsigned long data)
+{
+        struct net_device *dev = (struct net_device *)data;
+        struct dev_priv *priv = netdev_priv(dev);
+        unsigned int lnkstat, carrier;
+
+        lnkstat = read_ireg(dev->base_addr, ISALED0) & ISALED0_LNKST;
+        carrier = netif_carrier_ok(dev);
+
+        if (lnkstat && !carrier) {
+                netif_carrier_on(dev);
+                printk("%s: link up\n", dev->name);
+        } else if (!lnkstat && carrier) {
+                netif_carrier_off(dev);
+                printk("%s: link down\n", dev->name);
+        }
+
+        mod_timer(&priv->timer, jiffies + msecs_to_jiffies(500));
+}
+
+/*
+ * Open/initialize the board.
+ */
+static int
+am79c961_open(struct net_device *dev)
+{
+        struct dev_priv *priv = netdev_priv(dev);
+        int ret;
+
+        ret = request_irq(dev->irq, am79c961_interrupt, 0, dev->name, dev);
+        if (ret)
+                return ret;
+
+        am79c961_init_for_open(dev);
+
+        netif_carrier_off(dev);
+
+        priv->timer.expires = jiffies;
+        add_timer(&priv->timer);
+
+        netif_start_queue(dev);
+
+        return 0;
+}
+
+/*
+ * The inverse routine to am79c961_open().
+ */
+static int
+am79c961_close(struct net_device *dev)
+{
+        struct dev_priv *priv = netdev_priv(dev);
+        unsigned long flags;
+
+        del_timer_sync(&priv->timer);
+
+        netif_stop_queue(dev);
+        netif_carrier_off(dev);
+
+        spin_lock_irqsave(&priv->chip_lock, flags);
+        write_rreg (dev->base_addr, CSR0, CSR0_STOP);
+        write_rreg (dev->base_addr, CSR3, CSR3_MASKALL);
+        spin_unlock_irqrestore(&priv->chip_lock, flags);
+
+        free_irq (dev->irq, dev);
+
+        return 0;
+}
+
+/*
+ * Set or clear promiscuous/multicast mode filter for this adapter.
+ */
+static void am79c961_setmulticastlist (struct net_device *dev)
+{
+        struct dev_priv *priv = netdev_priv(dev);
+        unsigned long flags;
+        u16 multi_hash[4], mode = am79c961_get_rx_mode(dev, multi_hash);
+        int i, stopped;
+
+        spin_lock_irqsave(&priv->chip_lock, flags);
+
+        stopped = read_rreg(dev->base_addr, CSR0) & CSR0_STOP;
+
+        if (!stopped) {
+                /*
+                 * Put the chip into suspend mode
+                 */
+                write_rreg(dev->base_addr, CTRL1, CTRL1_SPND);
+
+                /*
+                 * Spin waiting for chip to report suspend mode
+                 */
+                while ((read_rreg(dev->base_addr, CTRL1) & CTRL1_SPND) == 0) {
+                        spin_unlock_irqrestore(&priv->chip_lock, flags);
+                        nop();
+                        spin_lock_irqsave(&priv->chip_lock, flags);
+                }
+        }
+
+        /*
+         * Update the multicast hash table
+         */
+        for (i = 0; i < ARRAY_SIZE(multi_hash); i++)
+                write_rreg(dev->base_addr, i + LADRL, multi_hash[i]);
+
+        /*
+         * Write the mode register
+         */
+        write_rreg(dev->base_addr, MODE, mode);
+
+        if (!stopped) {
+                /*
+                 * Put the chip back into running mode
+                 */
+                write_rreg(dev->base_addr, CTRL1, 0);
+        }
+
+        spin_unlock_irqrestore(&priv->chip_lock, flags);
+}
+
+static void am79c961_timeout(struct net_device *dev)
+{
+        printk(KERN_WARNING "%s: transmit timed out, network cable problem?\n",
+                dev->name);
+
+        /*
+         * ought to do some setup of the tx side here
+         */
+
+        netif_wake_queue(dev);
+}
+
+/*
+ * Transmit a packet
+ */
+static int
+am79c961_sendpacket(struct sk_buff *skb, struct net_device *dev)
+{
+        struct dev_priv *priv = netdev_priv(dev);
+        unsigned int hdraddr, bufaddr;
+        unsigned int head;
+        unsigned long flags;
+
+        head = priv->txhead;
+        hdraddr = priv->txhdr + (head << 3);
+        bufaddr = priv->txbuffer[head];
+        head += 1;
+        if (head >= TX_BUFFERS)
+                head = 0;
+
+        am_writebuffer (dev, bufaddr, skb->data, skb->len);
+        am_writeword (dev, hdraddr + 4, -skb->len);
+        am_writeword (dev, hdraddr + 2, TMD_OWN|TMD_STP|TMD_ENP);
+        priv->txhead = head;
+
+        spin_lock_irqsave(&priv->chip_lock, flags);
+        write_rreg (dev->base_addr, CSR0, CSR0_TDMD|CSR0_IENA);
+        spin_unlock_irqrestore(&priv->chip_lock, flags);
+
+        /*
+         * If the next packet is owned by the ethernet device,
+         * then the tx ring is full and we can't add another
+         * packet.
+         */
+        if (am_readword(dev, priv->txhdr + (priv->txhead << 3) + 2) & TMD_OWN)
+                netif_stop_queue(dev);
+
+        dev_kfree_skb(skb);
+
+        return NETDEV_TX_OK;
+}
+
+/*
+ * If we have a good packet(s), get it/them out of the buffers.
+ */
+static void
+am79c961_rx(struct net_device *dev, struct dev_priv *priv)
+{
+        do {
+                struct sk_buff *skb;
+                u_int hdraddr;
+                u_int pktaddr;
+                u_int status;
+                int len;
+
+                hdraddr = priv->rxhdr + (priv->rxtail << 3);
+                pktaddr = priv->rxbuffer[priv->rxtail];
+
+                status = am_readword (dev, hdraddr + 2);
+                if (status & RMD_OWN) /* do we own it? */
+                        break;
+
+                priv->rxtail ++;
+                if (priv->rxtail >= RX_BUFFERS)
+                        priv->rxtail = 0;
+
+                if ((status & (RMD_ERR|RMD_STP|RMD_ENP)) != (RMD_STP|RMD_ENP)) {
+                        am_writeword (dev, hdraddr + 2, RMD_OWN);
+                        dev->stats.rx_errors++;
+                        if (status & RMD_ERR) {
+                                if (status & RMD_FRAM)
+                                        dev->stats.rx_frame_errors++;
+                                if (status & RMD_CRC)
+                                        dev->stats.rx_crc_errors++;
+                        } else if (status & RMD_STP)
+                                dev->stats.rx_length_errors++;
+                        continue;
+                }
+
+                len = am_readword(dev, hdraddr + 6);
+                skb = dev_alloc_skb(len + 2);
+
+                if (skb) {
+                        skb_reserve(skb, 2);
+
+                        am_readbuffer(dev, pktaddr, skb_put(skb, len), len);
+                        am_writeword(dev, hdraddr + 2, RMD_OWN);
+                        skb->protocol = eth_type_trans(skb, dev);
+                        netif_rx(skb);
+                        dev->stats.rx_bytes += len;
+                        dev->stats.rx_packets++;
+                } else {
+                        am_writeword (dev, hdraddr + 2, RMD_OWN);
+                        printk (KERN_WARNING "%s: memory squeeze, dropping packet.\n", dev->name);
+                        dev->stats.rx_dropped++;
+                        break;
+                }
+        } while (1);
+}
+
+/*
+ * Update stats for the transmitted packet
+ */
+static void
+am79c961_tx(struct net_device *dev, struct dev_priv *priv)
+{
+        do {
+                short len;
+                u_int hdraddr;
+                u_int status;
+
+                hdraddr = priv->txhdr + (priv->txtail << 3);
+                status = am_readword (dev, hdraddr + 2);
+                if (status & TMD_OWN)
+                        break;
+
+                priv->txtail ++;
+                if (priv->txtail >= TX_BUFFERS)
+                        priv->txtail = 0;
+
+                if (status & TMD_ERR) {
+                        u_int status2;
+
+                        dev->stats.tx_errors++;
+
+                        status2 = am_readword (dev, hdraddr + 6);
+
+                        /*
+                         * Clear the error byte
+                         */
+                        am_writeword (dev, hdraddr + 6, 0);
+
+                        if (status2 & TST_RTRY)
+                                dev->stats.collisions += 16;
+                        if (status2 & TST_LCOL)
+                                dev->stats.tx_window_errors++;
+                        if (status2 & TST_LCAR)
+                                dev->stats.tx_carrier_errors++;
+                        if (status2 & TST_UFLO)
+                                dev->stats.tx_fifo_errors++;
+                        continue;
+                }
+                dev->stats.tx_packets++;
+                len = am_readword (dev, hdraddr + 4);
+                dev->stats.tx_bytes += -len;
+        } while (priv->txtail != priv->txhead);
+
+        netif_wake_queue(dev);
+}
+
+static irqreturn_t
+am79c961_interrupt(int irq, void *dev_id)
+{
+        struct net_device *dev = (struct net_device *)dev_id;
+        struct dev_priv *priv = netdev_priv(dev);
+        u_int status, n = 100;
+        int handled = 0;
+
+        do {
+                status = read_rreg(dev->base_addr, CSR0);
+                write_rreg(dev->base_addr, CSR0, status &
+                           (CSR0_IENA|CSR0_TINT|CSR0_RINT|
+                            CSR0_MERR|CSR0_MISS|CSR0_CERR|CSR0_BABL));
+
+                if (status & CSR0_RINT) {
+                        handled = 1;
+                        am79c961_rx(dev, priv);
+                }
+                if (status & CSR0_TINT) {
+                        handled = 1;
+                        am79c961_tx(dev, priv);
+                }
+                if (status & CSR0_MISS) {
+                        handled = 1;
+                        dev->stats.rx_dropped++;
+                }
+                if (status & CSR0_CERR) {
+                        handled = 1;
+                        mod_timer(&priv->timer, jiffies);
+                }
+        } while (--n && status & (CSR0_RINT | CSR0_TINT));
+
+        return IRQ_RETVAL(handled);
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void am79c961_poll_controller(struct net_device *dev)
+{
+        unsigned long flags;
+        local_irq_save(flags);
+        am79c961_interrupt(dev->irq, dev);
+        local_irq_restore(flags);
+}
+#endif
+
+/*
+ * Initialise the chip.  Note that we always expect
+ * to be entered with interrupts enabled.
+ */
+static int
+am79c961_hw_init(struct net_device *dev)
+{
+        struct dev_priv *priv = netdev_priv(dev);
+
+        spin_lock_irq(&priv->chip_lock);
+        write_rreg (dev->base_addr, CSR0, CSR0_STOP);
+        write_rreg (dev->base_addr, CSR3, CSR3_MASKALL);
+        spin_unlock_irq(&priv->chip_lock);
+
+        am79c961_ramtest(dev, 0x66);
+        am79c961_ramtest(dev, 0x99);
+
+        return 0;
+}
+
+static void __init am79c961_banner(void)
+{
+        static unsigned version_printed;
+
+        if (net_debug && version_printed++ == 0)
+                printk(KERN_INFO "%s", version);
+}
+static const struct net_device_ops am79c961_netdev_ops = {
+        .ndo_open               = am79c961_open,
+        .ndo_stop               = am79c961_close,
+        .ndo_start_xmit         = am79c961_sendpacket,
+        .ndo_set_multicast_list = am79c961_setmulticastlist,
+        .ndo_tx_timeout         = am79c961_timeout,
+        .ndo_validate_addr      = eth_validate_addr,
+        .ndo_change_mtu         = eth_change_mtu,
+        .ndo_set_mac_address    = eth_mac_addr,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+        .ndo_poll_controller    = am79c961_poll_controller,
+#endif
+};
+
+static int __devinit am79c961_probe(struct platform_device *pdev)
+{
+        struct resource *res;
+        struct net_device *dev;
+        struct dev_priv *priv;
+        int i, ret;
+
+        res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+        if (!res)
+                return -ENODEV;
+
+        dev = alloc_etherdev(sizeof(struct dev_priv));
+        ret = -ENOMEM;
+        if (!dev)
+                goto out;
+
+        SET_NETDEV_DEV(dev, &pdev->dev);
+
+        priv = netdev_priv(dev);
+
+        /*
+         * Fixed address and IRQ lines here.
+         * The PNP initialisation should have been
+         * done by the ether bootp loader.
+         */
+        dev->base_addr = res->start;
+        ret = platform_get_irq(pdev, 0);
+
+        if (ret < 0) {
+                ret = -ENODEV;
+                goto nodev;
+        }
+        dev->irq = ret;
+
+        ret = -ENODEV;
+        if (!request_region(dev->base_addr, 0x18, dev->name))
+                goto nodev;
+
+        /*
+         * Reset the device.
+         */
+        inb(dev->base_addr + NET_RESET);
+        udelay(5);
+
+        /*
+         * Check the manufacturer part of the
+         * ether address.
+         */
+        if (inb(dev->base_addr) != 0x08 ||
+            inb(dev->base_addr + 2) != 0x00 ||
+            inb(dev->base_addr + 4) != 0x2b)
+                goto release;
+
+        for (i = 0; i < 6; i++)
+                dev->dev_addr[i] = inb(dev->base_addr + i * 2) & 0xff;
+
+        am79c961_banner();
+
+        spin_lock_init(&priv->chip_lock);
+        init_timer(&priv->timer);
+        priv->timer.data = (unsigned long)dev;
+        priv->timer.function = am79c961_timer;
+
+        if (am79c961_hw_init(dev))
+                goto release;
+
+        dev->netdev_ops = &am79c961_netdev_ops;
+
+        ret = register_netdev(dev);
+        if (ret == 0) {
+                printk(KERN_INFO "%s: ether address %pM\n",
+                       dev->name, dev->dev_addr);
+                return 0;
+        }
+
+release:
+        release_region(dev->base_addr, 0x18);
+nodev:
+        free_netdev(dev);
+out:
+        return ret;
+}
+
+static struct platform_driver am79c961_driver = {
+        .probe          = am79c961_probe,
+        .driver         = {
+                .name   = "am79c961",
+        },
+};
+
+static int __init am79c961_init(void)
+{
+        return platform_driver_register(&am79c961_driver);
+}
+
+__initcall(am79c961_init);