a2065.c

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/*
 * Amiga Linux/68k A2065 Ethernet Driver
 *
 * (C) Copyright 1995-2003 by Geert Uytterhoeven <[email protected]>
 *
 * Fixes and tips by:
 *  - Janos Farkas ([email protected])
 *  - Jes Degn Soerensen ([email protected])
 *  - Matt Domsch ([email protected])
 *
 * ----------------------------------------------------------------------------
 *
 * This program is based on
 *
 *  ariadne.?:  Amiga Linux/68k Ariadne Ethernet Driver
 *          (C) Copyright 1995 by Geert Uytterhoeven,
 *                                            Peter De Schrijver
 *
 *  lance.c:    An AMD LANCE ethernet driver for linux.
 *          Written 1993-94 by Donald Becker.
 *
 *  Am79C960:   PCnet(tm)-ISA Single-Chip Ethernet Controller
 *          Advanced Micro Devices
 *          Publication #16907, Rev. B, Amendment/0, May 1994
 *
 * ----------------------------------------------------------------------------
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of the Linux
 * distribution for more details.
 *
 * ----------------------------------------------------------------------------
 *
 * The A2065 is a Zorro-II board made by Commodore/Ameristar. It contains:
 *
 *  - an Am7990 Local Area Network Controller for Ethernet (LANCE) with
 *    both 10BASE-2 (thin coax) and AUI (DB-15) connectors
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

/*#define DEBUG*/
/*#define TEST_HITS*/

#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/module.h>
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/skbuff.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/crc32.h>
#include <linux/zorro.h>
#include <linux/bitops.h>

#include <asm/irq.h>
#include <asm/amigaints.h>
#include <asm/amigahw.h>

#include "a2065.h"

/* Transmit/Receive Ring Definitions */

#define LANCE_LOG_TX_BUFFERS    (2)
#define LANCE_LOG_RX_BUFFERS    (4)

#define TX_RING_SIZE        (1 << LANCE_LOG_TX_BUFFERS)
#define RX_RING_SIZE        (1 << LANCE_LOG_RX_BUFFERS)

#define TX_RING_MOD_MASK    (TX_RING_SIZE - 1)
#define RX_RING_MOD_MASK    (RX_RING_SIZE - 1)

#define PKT_BUF_SIZE        (1544)
#define RX_BUFF_SIZE            PKT_BUF_SIZE
#define TX_BUFF_SIZE            PKT_BUF_SIZE

/* Layout of the Lance's RAM Buffer */

struct lance_init_block {
    unsigned short mode;        /* Pre-set mode (reg. 15) */
    unsigned char phys_addr[6];     /* Physical ethernet address */
    unsigned filter[2];     /* Multicast filter. */

    /* Receive and transmit ring base, along with extra bits. */
    unsigned short rx_ptr;      /* receive descriptor addr */
    unsigned short rx_len;      /* receive len and high addr */
    unsigned short tx_ptr;      /* transmit descriptor addr */
    unsigned short tx_len;      /* transmit len and high addr */

    /* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
    struct lance_rx_desc brx_ring[RX_RING_SIZE];
    struct lance_tx_desc btx_ring[TX_RING_SIZE];

    char rx_buf[RX_RING_SIZE][RX_BUFF_SIZE];
    char tx_buf[TX_RING_SIZE][TX_BUFF_SIZE];
};

/* Private Device Data */

struct lance_private {
    char *name;
    volatile struct lance_regs *ll;
    volatile struct lance_init_block *init_block;       /* Hosts view */
    volatile struct lance_init_block *lance_init_block; /* Lance view */

    int rx_new, tx_new;
    int rx_old, tx_old;

    int lance_log_rx_bufs, lance_log_tx_bufs;
    int rx_ring_mod_mask, tx_ring_mod_mask;

    int tpe;              /* cable-selection is TPE */
    int auto_select;          /* cable-selection by carrier */
    unsigned short busmaster_regval;

#ifdef CONFIG_SUNLANCE
    struct Linux_SBus_DMA *ledma; /* if set this points to ledma and arch=4m */
    int burst_sizes;          /* ledma SBus burst sizes */
#endif
    struct timer_list         multicast_timer;
};

#define LANCE_ADDR(x) ((int)(x) & ~0xff000000)

/* Load the CSR registers */
static void load_csrs(struct lance_private *lp)
{
    volatile struct lance_regs *ll = lp->ll;
    volatile struct lance_init_block *aib = lp->lance_init_block;
    int leptr = LANCE_ADDR(aib);

    ll->rap = LE_CSR1;
    ll->rdp = (leptr & 0xFFFF);
    ll->rap = LE_CSR2;
    ll->rdp = leptr >> 16;
    ll->rap = LE_CSR3;
    ll->rdp = lp->busmaster_regval;

    /* Point back to csr0 */
    ll->rap = LE_CSR0;
}

/* Setup the Lance Rx and Tx rings */
static void lance_init_ring(struct net_device *dev)
{
    struct lance_private *lp = netdev_priv(dev);
    volatile struct lance_init_block *ib = lp->init_block;
    volatile struct lance_init_block *aib = lp->lance_init_block;
                    /* for LANCE_ADDR computations */
    int leptr;
    int i;

    /* Lock out other processes while setting up hardware */
    netif_stop_queue(dev);
    lp->rx_new = lp->tx_new = 0;
    lp->rx_old = lp->tx_old = 0;

    ib->mode = 0;

    /* Copy the ethernet address to the lance init block
     * Note that on the sparc you need to swap the ethernet address.
     */
    ib->phys_addr[0] = dev->dev_addr[1];
    ib->phys_addr[1] = dev->dev_addr[0];
    ib->phys_addr[2] = dev->dev_addr[3];
    ib->phys_addr[3] = dev->dev_addr[2];
    ib->phys_addr[4] = dev->dev_addr[5];
    ib->phys_addr[5] = dev->dev_addr[4];

    /* Setup the Tx ring entries */
    netdev_dbg(dev, "TX rings:\n");
    for (i = 0; i <= 1 << lp->lance_log_tx_bufs; i++) {
        leptr = LANCE_ADDR(&aib->tx_buf[i][0]);
        ib->btx_ring[i].tmd0      = leptr;
        ib->btx_ring[i].tmd1_hadr = leptr >> 16;
        ib->btx_ring[i].tmd1_bits = 0;
        ib->btx_ring[i].length    = 0xf000; /* The ones required by tmd2 */
        ib->btx_ring[i].misc      = 0;
        if (i < 3)
            netdev_dbg(dev, "%d: 0x%08x\n", i, leptr);
    }

    /* Setup the Rx ring entries */
    netdev_dbg(dev, "RX rings:\n");
    for (i = 0; i < 1 << lp->lance_log_rx_bufs; i++) {
        leptr = LANCE_ADDR(&aib->rx_buf[i][0]);

        ib->brx_ring[i].rmd0      = leptr;
        ib->brx_ring[i].rmd1_hadr = leptr >> 16;
        ib->brx_ring[i].rmd1_bits = LE_R1_OWN;
        ib->brx_ring[i].length    = -RX_BUFF_SIZE | 0xf000;
        ib->brx_ring[i].mblength  = 0;
        if (i < 3)
            netdev_dbg(dev, "%d: 0x%08x\n", i, leptr);
    }

    /* Setup the initialization block */

    /* Setup rx descriptor pointer */
    leptr = LANCE_ADDR(&aib->brx_ring);
    ib->rx_len = (lp->lance_log_rx_bufs << 13) | (leptr >> 16);
    ib->rx_ptr = leptr;
    netdev_dbg(dev, "RX ptr: %08x\n", leptr);

    /* Setup tx descriptor pointer */
    leptr = LANCE_ADDR(&aib->btx_ring);
    ib->tx_len = (lp->lance_log_tx_bufs << 13) | (leptr >> 16);
    ib->tx_ptr = leptr;
    netdev_dbg(dev, "TX ptr: %08x\n", leptr);

    /* Clear the multicast filter */
    ib->filter[0] = 0;
    ib->filter[1] = 0;
}

static int init_restart_lance(struct lance_private *lp)
{
    volatile struct lance_regs *ll = lp->ll;
    int i;

    ll->rap = LE_CSR0;
    ll->rdp = LE_C0_INIT;

    /* Wait for the lance to complete initialization */
    for (i = 0; (i < 100) && !(ll->rdp & (LE_C0_ERR | LE_C0_IDON)); i++)
        barrier();
    if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
        pr_err("unopened after %d ticks, csr0=%04x\n", i, ll->rdp);
        return -EIO;
    }

    /* Clear IDON by writing a "1", enable interrupts and start lance */
    ll->rdp = LE_C0_IDON;
    ll->rdp = LE_C0_INEA | LE_C0_STRT;

    return 0;
}

static int lance_rx(struct net_device *dev)
{
    struct lance_private *lp = netdev_priv(dev);
    volatile struct lance_init_block *ib = lp->init_block;
    volatile struct lance_regs *ll = lp->ll;
    volatile struct lance_rx_desc *rd;
    unsigned char bits;

#ifdef TEST_HITS
    int i;
    char buf[RX_RING_SIZE + 1];

    for (i = 0; i < RX_RING_SIZE; i++) {
        char r1_own = ib->brx_ring[i].rmd1_bits & LE_R1_OWN;
        if (i == lp->rx_new)
            buf[i] = r1_own ? '_' : 'X';
        else
            buf[i] = r1_own ? '.' : '1';
    }
    buf[RX_RING_SIZE] = 0;

    pr_debug("RxRing TestHits: [%s]\n", buf);
#endif

    ll->rdp = LE_C0_RINT | LE_C0_INEA;
    for (rd = &ib->brx_ring[lp->rx_new];
         !((bits = rd->rmd1_bits) & LE_R1_OWN);
         rd = &ib->brx_ring[lp->rx_new]) {

        /* We got an incomplete frame? */
        if ((bits & LE_R1_POK) != LE_R1_POK) {
            dev->stats.rx_over_errors++;
            dev->stats.rx_errors++;
            continue;
        } else if (bits & LE_R1_ERR) {
            /* Count only the end frame as a rx error,
             * not the beginning
             */
            if (bits & LE_R1_BUF)
                dev->stats.rx_fifo_errors++;
            if (bits & LE_R1_CRC)
                dev->stats.rx_crc_errors++;
            if (bits & LE_R1_OFL)
                dev->stats.rx_over_errors++;
            if (bits & LE_R1_FRA)
                dev->stats.rx_frame_errors++;
            if (bits & LE_R1_EOP)
                dev->stats.rx_errors++;
        } else {
            int len = (rd->mblength & 0xfff) - 4;
            struct sk_buff *skb = netdev_alloc_skb(dev, len + 2);

            if (!skb) {
                netdev_warn(dev, "Memory squeeze, deferring packet\n");
                dev->stats.rx_dropped++;
                rd->mblength = 0;
                rd->rmd1_bits = LE_R1_OWN;
                lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
                return 0;
            }

            skb_reserve(skb, 2);        /* 16 byte align */
            skb_put(skb, len);      /* make room */
            skb_copy_to_linear_data(skb,
                 (unsigned char *)&ib->rx_buf[lp->rx_new][0],
                 len);
            skb->protocol = eth_type_trans(skb, dev);
            netif_rx(skb);
            dev->stats.rx_packets++;
            dev->stats.rx_bytes += len;
        }

        /* Return the packet to the pool */
        rd->mblength = 0;
        rd->rmd1_bits = LE_R1_OWN;
        lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
    }
    return 0;
}

static int lance_tx(struct net_device *dev)
{
    struct lance_private *lp = netdev_priv(dev);
    volatile struct lance_init_block *ib = lp->init_block;
    volatile struct lance_regs *ll = lp->ll;
    volatile struct lance_tx_desc *td;
    int i, j;
    int status;

    /* csr0 is 2f3 */
    ll->rdp = LE_C0_TINT | LE_C0_INEA;
    /* csr0 is 73 */

    j = lp->tx_old;
    for (i = j; i != lp->tx_new; i = j) {
        td = &ib->btx_ring[i];

        /* If we hit a packet not owned by us, stop */
        if (td->tmd1_bits & LE_T1_OWN)
            break;

        if (td->tmd1_bits & LE_T1_ERR) {
            status = td->misc;

            dev->stats.tx_errors++;
            if (status & LE_T3_RTY)
                dev->stats.tx_aborted_errors++;
            if (status & LE_T3_LCOL)
                dev->stats.tx_window_errors++;

            if (status & LE_T3_CLOS) {
                dev->stats.tx_carrier_errors++;
                if (lp->auto_select) {
                    lp->tpe = 1 - lp->tpe;
                    netdev_err(dev, "Carrier Lost, trying %s\n",
                           lp->tpe ? "TPE" : "AUI");
                    /* Stop the lance */
                    ll->rap = LE_CSR0;
                    ll->rdp = LE_C0_STOP;
                    lance_init_ring(dev);
                    load_csrs(lp);
                    init_restart_lance(lp);
                    return 0;
                }
            }

            /* buffer errors and underflows turn off
             * the transmitter, so restart the adapter
             */
            if (status & (LE_T3_BUF | LE_T3_UFL)) {
                dev->stats.tx_fifo_errors++;

                netdev_err(dev, "Tx: ERR_BUF|ERR_UFL, restarting\n");
                /* Stop the lance */
                ll->rap = LE_CSR0;
                ll->rdp = LE_C0_STOP;
                lance_init_ring(dev);
                load_csrs(lp);
                init_restart_lance(lp);
                return 0;
            }
        } else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) {
            /* So we don't count the packet more than once. */
            td->tmd1_bits &= ~(LE_T1_POK);

            /* One collision before packet was sent. */
            if (td->tmd1_bits & LE_T1_EONE)
                dev->stats.collisions++;

            /* More than one collision, be optimistic. */
            if (td->tmd1_bits & LE_T1_EMORE)
                dev->stats.collisions += 2;

            dev->stats.tx_packets++;
        }

        j = (j + 1) & lp->tx_ring_mod_mask;
    }
    lp->tx_old = j;
    ll->rdp = LE_C0_TINT | LE_C0_INEA;
    return 0;
}

static int lance_tx_buffs_avail(struct lance_private *lp)
{
    if (lp->tx_old <= lp->tx_new)
        return lp->tx_old + lp->tx_ring_mod_mask - lp->tx_new;
    return lp->tx_old - lp->tx_new - 1;
}

static irqreturn_t lance_interrupt(int irq, void *dev_id)
{
    struct net_device *dev = dev_id;
    struct lance_private *lp = netdev_priv(dev);
    volatile struct lance_regs *ll = lp->ll;
    int csr0;

    ll->rap = LE_CSR0;      /* LANCE Controller Status */
    csr0 = ll->rdp;

    if (!(csr0 & LE_C0_INTR))   /* Check if any interrupt has */
        return IRQ_NONE;    /* been generated by the Lance. */

    /* Acknowledge all the interrupt sources ASAP */
    ll->rdp = csr0 & ~(LE_C0_INEA | LE_C0_TDMD | LE_C0_STOP | LE_C0_STRT |
               LE_C0_INIT);

    if (csr0 & LE_C0_ERR) {
        /* Clear the error condition */
        ll->rdp = LE_C0_BABL | LE_C0_ERR | LE_C0_MISS | LE_C0_INEA;
    }

    if (csr0 & LE_C0_RINT)
        lance_rx(dev);

    if (csr0 & LE_C0_TINT)
        lance_tx(dev);

    /* Log misc errors. */
    if (csr0 & LE_C0_BABL)
        dev->stats.tx_errors++;       /* Tx babble. */
    if (csr0 & LE_C0_MISS)
        dev->stats.rx_errors++;       /* Missed a Rx frame. */
    if (csr0 & LE_C0_MERR) {
        netdev_err(dev, "Bus master arbitration failure, status %04x\n",
               csr0);
        /* Restart the chip. */
        ll->rdp = LE_C0_STRT;
    }

    if (netif_queue_stopped(dev) && lance_tx_buffs_avail(lp) > 0)
        netif_wake_queue(dev);

    ll->rap = LE_CSR0;
    ll->rdp = (LE_C0_BABL | LE_C0_CERR | LE_C0_MISS | LE_C0_MERR |
           LE_C0_IDON | LE_C0_INEA);
    return IRQ_HANDLED;
}

static int lance_open(struct net_device *dev)
{
    struct lance_private *lp = netdev_priv(dev);
    volatile struct lance_regs *ll = lp->ll;
    int ret;

    /* Stop the Lance */
    ll->rap = LE_CSR0;
    ll->rdp = LE_C0_STOP;

    /* Install the Interrupt handler */
    ret = request_irq(IRQ_AMIGA_PORTS, lance_interrupt, IRQF_SHARED,
              dev->name, dev);
    if (ret)
        return ret;

    load_csrs(lp);
    lance_init_ring(dev);

    netif_start_queue(dev);

    return init_restart_lance(lp);
}

static int lance_close(struct net_device *dev)
{
    struct lance_private *lp = netdev_priv(dev);
    volatile struct lance_regs *ll = lp->ll;

    netif_stop_queue(dev);
    del_timer_sync(&lp->multicast_timer);

    /* Stop the card */
    ll->rap = LE_CSR0;
    ll->rdp = LE_C0_STOP;

    free_irq(IRQ_AMIGA_PORTS, dev);
    return 0;
}

static inline int lance_reset(struct net_device *dev)
{
    struct lance_private *lp = netdev_priv(dev);
    volatile struct lance_regs *ll = lp->ll;
    int status;

    /* Stop the lance */
    ll->rap = LE_CSR0;
    ll->rdp = LE_C0_STOP;

    load_csrs(lp);

    lance_init_ring(dev);
    dev->trans_start = jiffies; /* prevent tx timeout */
    netif_start_queue(dev);

    status = init_restart_lance(lp);
    netdev_dbg(dev, "Lance restart=%d\n", status);

    return status;
}

static void lance_tx_timeout(struct net_device *dev)
{
    struct lance_private *lp = netdev_priv(dev);
    volatile struct lance_regs *ll = lp->ll;

    netdev_err(dev, "transmit timed out, status %04x, reset\n", ll->rdp);
    lance_reset(dev);
    netif_wake_queue(dev);
}

static netdev_tx_t lance_start_xmit(struct sk_buff *skb,
                    struct net_device *dev)
{
    struct lance_private *lp = netdev_priv(dev);
    volatile struct lance_regs *ll = lp->ll;
    volatile struct lance_init_block *ib = lp->init_block;
    int entry, skblen;
    int status = NETDEV_TX_OK;
    unsigned long flags;

    if (skb_padto(skb, ETH_ZLEN))
        return NETDEV_TX_OK;
    skblen = max_t(unsigned, skb->len, ETH_ZLEN);

    local_irq_save(flags);

    if (!lance_tx_buffs_avail(lp)) {
        local_irq_restore(flags);
        return NETDEV_TX_LOCKED;
    }

#ifdef DEBUG
    /* dump the packet */
    print_hex_dump(KERN_DEBUG, "skb->data: ", DUMP_PREFIX_NONE,
               16, 1, skb->data, 64, true);
#endif
    entry = lp->tx_new & lp->tx_ring_mod_mask;
    ib->btx_ring[entry].length = (-skblen) | 0xf000;
    ib->btx_ring[entry].misc = 0;

    skb_copy_from_linear_data(skb, (void *)&ib->tx_buf[entry][0], skblen);

    /* Now, give the packet to the lance */
    ib->btx_ring[entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
    lp->tx_new = (lp->tx_new+1) & lp->tx_ring_mod_mask;
    dev->stats.tx_bytes += skblen;

    if (lance_tx_buffs_avail(lp) <= 0)
        netif_stop_queue(dev);

    /* Kick the lance: transmit now */
    ll->rdp = LE_C0_INEA | LE_C0_TDMD;
    dev_kfree_skb(skb);

    local_irq_restore(flags);

    return status;
}

/* taken from the depca driver */
static void lance_load_multicast(struct net_device *dev)
{
    struct lance_private *lp = netdev_priv(dev);
    volatile struct lance_init_block *ib = lp->init_block;
    volatile u16 *mcast_table = (u16 *)&ib->filter;
    struct netdev_hw_addr *ha;
    u32 crc;

    /* set all multicast bits */
    if (dev->flags & IFF_ALLMULTI) {
        ib->filter[0] = 0xffffffff;
        ib->filter[1] = 0xffffffff;
        return;
    }
    /* clear the multicast filter */
    ib->filter[0] = 0;
    ib->filter[1] = 0;

    /* Add addresses */
    netdev_for_each_mc_addr(ha, dev) {
        crc = ether_crc_le(6, ha->addr);
        crc = crc >> 26;
        mcast_table[crc >> 4] |= 1 << (crc & 0xf);
    }
}

static void lance_set_multicast(struct net_device *dev)
{
    struct lance_private *lp = netdev_priv(dev);
    volatile struct lance_init_block *ib = lp->init_block;
    volatile struct lance_regs *ll = lp->ll;

    if (!netif_running(dev))
        return;

    if (lp->tx_old != lp->tx_new) {
        mod_timer(&lp->multicast_timer, jiffies + 4);
        netif_wake_queue(dev);
        return;
    }

    netif_stop_queue(dev);

    ll->rap = LE_CSR0;
    ll->rdp = LE_C0_STOP;
    lance_init_ring(dev);

    if (dev->flags & IFF_PROMISC) {
        ib->mode |= LE_MO_PROM;
    } else {
        ib->mode &= ~LE_MO_PROM;
        lance_load_multicast(dev);
    }
    load_csrs(lp);
    init_restart_lance(lp);
    netif_wake_queue(dev);
}

static int __devinit a2065_init_one(struct zorro_dev *z,
                    const struct zorro_device_id *ent);
static void __devexit a2065_remove_one(struct zorro_dev *z);


static struct zorro_device_id a2065_zorro_tbl[] __devinitdata = {
    { ZORRO_PROD_CBM_A2065_1 },
    { ZORRO_PROD_CBM_A2065_2 },
    { ZORRO_PROD_AMERISTAR_A2065 },
    { 0 }
};
MODULE_DEVICE_TABLE(zorro, a2065_zorro_tbl);

static struct zorro_driver a2065_driver = {
    .name       = "a2065",
    .id_table   = a2065_zorro_tbl,
    .probe      = a2065_init_one,
    .remove     = __devexit_p(a2065_remove_one),
};

static const struct net_device_ops lance_netdev_ops = {
    .ndo_open       = lance_open,
    .ndo_stop       = lance_close,
    .ndo_start_xmit     = lance_start_xmit,
    .ndo_tx_timeout     = lance_tx_timeout,
    .ndo_set_rx_mode    = lance_set_multicast,
    .ndo_validate_addr  = eth_validate_addr,
    .ndo_change_mtu     = eth_change_mtu,
    .ndo_set_mac_address    = eth_mac_addr,
};

static int __devinit a2065_init_one(struct zorro_dev *z,
                    const struct zorro_device_id *ent)
{
    struct net_device *dev;
    struct lance_private *priv;
    unsigned long board = z->resource.start;
    unsigned long base_addr = board + A2065_LANCE;
    unsigned long mem_start = board + A2065_RAM;
    struct resource *r1, *r2;
    int err;

    r1 = request_mem_region(base_addr, sizeof(struct lance_regs),
                "Am7990");
    if (!r1)
        return -EBUSY;
    r2 = request_mem_region(mem_start, A2065_RAM_SIZE, "RAM");
    if (!r2) {
        release_mem_region(base_addr, sizeof(struct lance_regs));
        return -EBUSY;
    }

    dev = alloc_etherdev(sizeof(struct lance_private));
    if (dev == NULL) {
        release_mem_region(base_addr, sizeof(struct lance_regs));
        release_mem_region(mem_start, A2065_RAM_SIZE);
        return -ENOMEM;
    }

    priv = netdev_priv(dev);

    r1->name = dev->name;
    r2->name = dev->name;

    dev->dev_addr[0] = 0x00;
    if (z->id != ZORRO_PROD_AMERISTAR_A2065) {  /* Commodore */
        dev->dev_addr[1] = 0x80;
        dev->dev_addr[2] = 0x10;
    } else {                    /* Ameristar */
        dev->dev_addr[1] = 0x00;
        dev->dev_addr[2] = 0x9f;
    }
    dev->dev_addr[3] = (z->rom.er_SerialNumber >> 16) & 0xff;
    dev->dev_addr[4] = (z->rom.er_SerialNumber >> 8) & 0xff;
    dev->dev_addr[5] = z->rom.er_SerialNumber & 0xff;
    dev->base_addr = ZTWO_VADDR(base_addr);
    dev->mem_start = ZTWO_VADDR(mem_start);
    dev->mem_end = dev->mem_start + A2065_RAM_SIZE;

    priv->ll = (volatile struct lance_regs *)dev->base_addr;
    priv->init_block = (struct lance_init_block *)dev->mem_start;
    priv->lance_init_block = (struct lance_init_block *)A2065_RAM;
    priv->auto_select = 0;
    priv->busmaster_regval = LE_C3_BSWP;

    priv->lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
    priv->lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
    priv->rx_ring_mod_mask = RX_RING_MOD_MASK;
    priv->tx_ring_mod_mask = TX_RING_MOD_MASK;

    dev->netdev_ops = &lance_netdev_ops;
    dev->watchdog_timeo = 5*HZ;
    dev->dma = 0;

    init_timer(&priv->multicast_timer);
    priv->multicast_timer.data = (unsigned long) dev;
    priv->multicast_timer.function =
        (void (*)(unsigned long))lance_set_multicast;

    err = register_netdev(dev);
    if (err) {
        release_mem_region(base_addr, sizeof(struct lance_regs));
        release_mem_region(mem_start, A2065_RAM_SIZE);
        free_netdev(dev);
        return err;
    }
    zorro_set_drvdata(z, dev);

    netdev_info(dev, "A2065 at 0x%08lx, Ethernet Address %pM\n",
            board, dev->dev_addr);

    return 0;
}


static void __devexit a2065_remove_one(struct zorro_dev *z)
{
    struct net_device *dev = zorro_get_drvdata(z);

    unregister_netdev(dev);
    release_mem_region(ZTWO_PADDR(dev->base_addr),
               sizeof(struct lance_regs));
    release_mem_region(ZTWO_PADDR(dev->mem_start), A2065_RAM_SIZE);
    free_netdev(dev);
}

static int __init a2065_init_module(void)
{
    return zorro_register_driver(&a2065_driver);
}

static void __exit a2065_cleanup_module(void)
{
    zorro_unregister_driver(&a2065_driver);
}

module_init(a2065_init_module);
module_exit(a2065_cleanup_module);

MODULE_LICENSE("GPL");