3c*/acenic/typhoon: Move 3Com Ethernet drivers

Moves the 3Com drivers into drivers/net/ethernet/3com/ and the necessary
Kconfig and Makefile changes.

Did not move the following drivers becuase they use a non-3Com
chipset: 3c503, 3c505, 3c507, 3c523 and 3c527

CC: Steffen Klassert <klassert@mathematik.tu-chemnitz.de>
CC: David Dillow <dave@thedillows.org>
CC: Jes Sorensen <jes@trained-monkey.org>
CC: Alan Cox <alan@linux.intel.com>
CC: David Hinds <dahinds@users.sourceforge.net>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: David Dillow <dave@thedillows.org>

1 files changed, 943 insertions, 0 deletions

diff --git a/drivers/net/ethernet/3com/3c589_cs.c b/drivers/net/ethernet/3com/3c589_cs.c
new file mode 100644
index 000000000000..4a1a35809807
--- /dev/null
+++ b/drivers/net/ethernet/3com/3c589_cs.c
@@ -0,0 +1,943 @@
+/*======================================================================
+
+    A PCMCIA ethernet driver for the 3com 3c589 card.
+
+    Copyright (C) 1999 David A. Hinds -- dahinds@users.sourceforge.net
+
+    3c589_cs.c 1.162 2001/10/13 00:08:50
+
+    The network driver code is based on Donald Becker's 3c589 code:
+
+    Written 1994 by Donald Becker.
+    Copyright 1993 United States Government as represented by the
+    Director, National Security Agency.  This software may be used and
+    distributed according to the terms of the GNU General Public License,
+    incorporated herein by reference.
+    Donald Becker may be reached at becker@scyld.com
+
+    Updated for 2.5.x by Alan Cox <alan@lxorguk.ukuu.org.uk>
+
+======================================================================*/
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#define DRV_NAME	"3c589_cs"
+#define DRV_VERSION	"1.162-ac"
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/in.h>
+#include <linux/delay.h>
+#include <linux/ethtool.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/if_arp.h>
+#include <linux/ioport.h>
+#include <linux/bitops.h>
+#include <linux/jiffies.h>
+
+#include <pcmcia/cistpl.h>
+#include <pcmcia/cisreg.h>
+#include <pcmcia/ciscode.h>
+#include <pcmcia/ds.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/system.h>
+
+/* To minimize the size of the driver source I only define operating
+   constants if they are used several times.  You'll need the manual
+   if you want to understand driver details. */
+/* Offsets from base I/O address. */
+#define EL3_DATA	0x00
+#define EL3_TIMER	0x0a
+#define EL3_CMD		0x0e
+#define EL3_STATUS	0x0e
+
+#define EEPROM_READ	0x0080
+#define EEPROM_BUSY	0x8000
+
+#define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
+
+/* The top five bits written to EL3_CMD are a command, the lower
+   11 bits are the parameter, if applicable. */
+enum c509cmd {
+	TotalReset	= 0<<11,
+	SelectWindow	= 1<<11,
+	StartCoax	= 2<<11,
+	RxDisable	= 3<<11,
+	RxEnable	= 4<<11,
+	RxReset		= 5<<11,
+	RxDiscard	= 8<<11,
+	TxEnable	= 9<<11,
+	TxDisable	= 10<<11,
+	TxReset		= 11<<11,
+	FakeIntr	= 12<<11,
+	AckIntr		= 13<<11,
+	SetIntrEnb	= 14<<11,
+	SetStatusEnb	= 15<<11,
+	SetRxFilter	= 16<<11,
+	SetRxThreshold	= 17<<11,
+	SetTxThreshold	= 18<<11,
+	SetTxStart	= 19<<11,
+	StatsEnable	= 21<<11,
+	StatsDisable	= 22<<11,
+	StopCoax	= 23<<11
+};
+
+enum c509status {
+	IntLatch	= 0x0001,
+	AdapterFailure	= 0x0002,
+	TxComplete	= 0x0004,
+	TxAvailable	= 0x0008,
+	RxComplete	= 0x0010,
+	RxEarly		= 0x0020,
+	IntReq		= 0x0040,
+	StatsFull	= 0x0080,
+	CmdBusy		= 0x1000
+};
+
+/* The SetRxFilter command accepts the following classes: */
+enum RxFilter {
+	RxStation	= 1,
+	RxMulticast	= 2,
+	RxBroadcast	= 4,
+	RxProm		= 8
+};
+
+/* Register window 1 offsets, the window used in normal operation. */
+#define TX_FIFO		0x00
+#define RX_FIFO		0x00
+#define RX_STATUS	0x08
+#define TX_STATUS	0x0B
+#define TX_FREE		0x0C	/* Remaining free bytes in Tx buffer. */
+
+#define WN0_IRQ		0x08	/* Window 0: Set IRQ line in bits 12-15. */
+#define WN4_MEDIA	0x0A	/* Window 4: Various transcvr/media bits. */
+#define MEDIA_TP	0x00C0	/* Enable link beat and jabber for 10baseT. */
+#define MEDIA_LED	0x0001	/* Enable link light on 3C589E cards. */
+
+/* Time in jiffies before concluding Tx hung */
+#define TX_TIMEOUT	((400*HZ)/1000)
+
+struct el3_private {
+	struct pcmcia_device	*p_dev;
+	/* For transceiver monitoring */
+	struct timer_list	media;
+	u16			media_status;
+	u16			fast_poll;
+	unsigned long		last_irq;
+	spinlock_t		lock;
+};
+
+static const char *if_names[] = { "auto", "10baseT", "10base2", "AUI" };
+
+/*====================================================================*/
+
+/* Module parameters */
+
+MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
+MODULE_DESCRIPTION("3Com 3c589 series PCMCIA ethernet driver");
+MODULE_LICENSE("GPL");
+
+#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
+
+/* Special hook for setting if_port when module is loaded */
+INT_MODULE_PARM(if_port, 0);
+
+
+/*====================================================================*/
+
+static int tc589_config(struct pcmcia_device *link);
+static void tc589_release(struct pcmcia_device *link);
+
+static u16 read_eeprom(unsigned int ioaddr, int index);
+static void tc589_reset(struct net_device *dev);
+static void media_check(unsigned long arg);
+static int el3_config(struct net_device *dev, struct ifmap *map);
+static int el3_open(struct net_device *dev);
+static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
+					struct net_device *dev);
+static irqreturn_t el3_interrupt(int irq, void *dev_id);
+static void update_stats(struct net_device *dev);
+static struct net_device_stats *el3_get_stats(struct net_device *dev);
+static int el3_rx(struct net_device *dev);
+static int el3_close(struct net_device *dev);
+static void el3_tx_timeout(struct net_device *dev);
+static void set_rx_mode(struct net_device *dev);
+static void set_multicast_list(struct net_device *dev);
+static const struct ethtool_ops netdev_ethtool_ops;
+
+static void tc589_detach(struct pcmcia_device *p_dev);
+
+static const struct net_device_ops el3_netdev_ops = {
+	.ndo_open		= el3_open,
+	.ndo_stop		= el3_close,
+	.ndo_start_xmit		= el3_start_xmit,
+	.ndo_tx_timeout		= el3_tx_timeout,
+	.ndo_set_config		= el3_config,
+	.ndo_get_stats		= el3_get_stats,
+	.ndo_set_multicast_list = set_multicast_list,
+	.ndo_change_mtu		= eth_change_mtu,
+	.ndo_set_mac_address	= eth_mac_addr,
+	.ndo_validate_addr	= eth_validate_addr,
+};
+
+static int tc589_probe(struct pcmcia_device *link)
+{
+    struct el3_private *lp;
+    struct net_device *dev;
+
+    dev_dbg(&link->dev, "3c589_attach()\n");
+
+    /* Create new ethernet device */
+    dev = alloc_etherdev(sizeof(struct el3_private));
+    if (!dev)
+	 return -ENOMEM;
+    lp = netdev_priv(dev);
+    link->priv = dev;
+    lp->p_dev = link;
+
+    spin_lock_init(&lp->lock);
+    link->resource[0]->end = 16;
+    link->resource[0]->flags |= IO_DATA_PATH_WIDTH_16;
+
+    link->config_flags |= CONF_ENABLE_IRQ;
+    link->config_index = 1;
+
+    dev->netdev_ops = &el3_netdev_ops;
+    dev->watchdog_timeo = TX_TIMEOUT;
+
+    SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
+
+    return tc589_config(link);
+}
+
+static void tc589_detach(struct pcmcia_device *link)
+{
+    struct net_device *dev = link->priv;
+
+    dev_dbg(&link->dev, "3c589_detach\n");
+
+    unregister_netdev(dev);
+
+    tc589_release(link);
+
+    free_netdev(dev);
+} /* tc589_detach */
+
+static int tc589_config(struct pcmcia_device *link)
+{
+    struct net_device *dev = link->priv;
+    __be16 *phys_addr;
+    int ret, i, j, multi = 0, fifo;
+    unsigned int ioaddr;
+    static const char * const ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
+    u8 *buf;
+    size_t len;
+
+    dev_dbg(&link->dev, "3c589_config\n");
+
+    phys_addr = (__be16 *)dev->dev_addr;
+    /* Is this a 3c562? */
+    if (link->manf_id != MANFID_3COM)
+	    dev_info(&link->dev, "hmmm, is this really a 3Com card??\n");
+    multi = (link->card_id == PRODID_3COM_3C562);
+
+    link->io_lines = 16;
+
+    /* For the 3c562, the base address must be xx00-xx7f */
+    for (i = j = 0; j < 0x400; j += 0x10) {
+	if (multi && (j & 0x80)) continue;
+	link->resource[0]->start = j ^ 0x300;
+	i = pcmcia_request_io(link);
+	if (i == 0)
+		break;
+    }
+    if (i != 0)
+	goto failed;
+
+    ret = pcmcia_request_irq(link, el3_interrupt);
+    if (ret)
+	    goto failed;
+
+    ret = pcmcia_enable_device(link);
+    if (ret)
+	    goto failed;
+
+    dev->irq = link->irq;
+    dev->base_addr = link->resource[0]->start;
+    ioaddr = dev->base_addr;
+    EL3WINDOW(0);
+
+    /* The 3c589 has an extra EEPROM for configuration info, including
+       the hardware address.  The 3c562 puts the address in the CIS. */
+    len = pcmcia_get_tuple(link, 0x88, &buf);
+    if (buf && len >= 6) {
+	    for (i = 0; i < 3; i++)
+		    phys_addr[i] = htons(le16_to_cpu(buf[i*2]));
+	    kfree(buf);
+    } else {
+	kfree(buf); /* 0 < len < 6 */
+	for (i = 0; i < 3; i++)
+	    phys_addr[i] = htons(read_eeprom(ioaddr, i));
+	if (phys_addr[0] == htons(0x6060)) {
+	    dev_err(&link->dev, "IO port conflict at 0x%03lx-0x%03lx\n",
+		    dev->base_addr, dev->base_addr+15);
+	    goto failed;
+	}
+    }
+
+    /* The address and resource configuration register aren't loaded from
+       the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version. */
+    outw(0x3f00, ioaddr + 8);
+    fifo = inl(ioaddr);
+
+    /* The if_port symbol can be set when the module is loaded */
+    if ((if_port >= 0) && (if_port <= 3))
+	dev->if_port = if_port;
+    else
+	dev_err(&link->dev, "invalid if_port requested\n");
+
+    SET_NETDEV_DEV(dev, &link->dev);
+
+    if (register_netdev(dev) != 0) {
+	    dev_err(&link->dev, "register_netdev() failed\n");
+	goto failed;
+    }
+
+    netdev_info(dev, "3Com 3c%s, io %#3lx, irq %d, hw_addr %pM\n",
+		(multi ? "562" : "589"), dev->base_addr, dev->irq,
+		dev->dev_addr);
+    netdev_info(dev, "  %dK FIFO split %s Rx:Tx, %s xcvr\n",
+		(fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3],
+		if_names[dev->if_port]);
+    return 0;
+
+failed:
+    tc589_release(link);
+    return -ENODEV;
+} /* tc589_config */
+
+static void tc589_release(struct pcmcia_device *link)
+{
+	pcmcia_disable_device(link);
+}
+
+static int tc589_suspend(struct pcmcia_device *link)
+{
+	struct net_device *dev = link->priv;
+
+	if (link->open)
+		netif_device_detach(dev);
+
+	return 0;
+}
+
+static int tc589_resume(struct pcmcia_device *link)
+{
+	struct net_device *dev = link->priv;
+
+	if (link->open) {
+		tc589_reset(dev);
+		netif_device_attach(dev);
+	}
+
+	return 0;
+}
+
+/*====================================================================*/
+
+/*
+  Use this for commands that may take time to finish
+*/
+static void tc589_wait_for_completion(struct net_device *dev, int cmd)
+{
+    int i = 100;
+    outw(cmd, dev->base_addr + EL3_CMD);
+    while (--i > 0)
+	if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break;
+    if (i == 0)
+	netdev_warn(dev, "command 0x%04x did not complete!\n", cmd);
+}
+
+/*
+  Read a word from the EEPROM using the regular EEPROM access register.
+  Assume that we are in register window zero.
+*/
+static u16 read_eeprom(unsigned int ioaddr, int index)
+{
+    int i;
+    outw(EEPROM_READ + index, ioaddr + 10);
+    /* Reading the eeprom takes 162 us */
+    for (i = 1620; i >= 0; i--)
+	if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
+	    break;
+    return inw(ioaddr + 12);
+}
+
+/*
+  Set transceiver type, perhaps to something other than what the user
+  specified in dev->if_port.
+*/
+static void tc589_set_xcvr(struct net_device *dev, int if_port)
+{
+    struct el3_private *lp = netdev_priv(dev);
+    unsigned int ioaddr = dev->base_addr;
+
+    EL3WINDOW(0);
+    switch (if_port) {
+    case 0: case 1: outw(0, ioaddr + 6); break;
+    case 2: outw(3<<14, ioaddr + 6); break;
+    case 3: outw(1<<14, ioaddr + 6); break;
+    }
+    /* On PCMCIA, this just turns on the LED */
+    outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD);
+    /* 10baseT interface, enable link beat and jabber check. */
+    EL3WINDOW(4);
+    outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA);
+    EL3WINDOW(1);
+    if (if_port == 2)
+	lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000);
+    else
+	lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800);
+}
+
+static void dump_status(struct net_device *dev)
+{
+    unsigned int ioaddr = dev->base_addr;
+    EL3WINDOW(1);
+    netdev_info(dev, "  irq status %04x, rx status %04x, tx status %02x  tx free %04x\n",
+		inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS),
+		inb(ioaddr+TX_STATUS), inw(ioaddr+TX_FREE));
+    EL3WINDOW(4);
+    netdev_info(dev, "  diagnostics: fifo %04x net %04x ethernet %04x media %04x\n",
+		inw(ioaddr+0x04), inw(ioaddr+0x06), inw(ioaddr+0x08),
+		inw(ioaddr+0x0a));
+    EL3WINDOW(1);
+}
+
+/* Reset and restore all of the 3c589 registers. */
+static void tc589_reset(struct net_device *dev)
+{
+    unsigned int ioaddr = dev->base_addr;
+    int i;
+
+    EL3WINDOW(0);
+    outw(0x0001, ioaddr + 4);			/* Activate board. */
+    outw(0x3f00, ioaddr + 8);			/* Set the IRQ line. */
+
+    /* Set the station address in window 2. */
+    EL3WINDOW(2);
+    for (i = 0; i < 6; i++)
+	outb(dev->dev_addr[i], ioaddr + i);
+
+    tc589_set_xcvr(dev, dev->if_port);
+
+    /* Switch to the stats window, and clear all stats by reading. */
+    outw(StatsDisable, ioaddr + EL3_CMD);
+    EL3WINDOW(6);
+    for (i = 0; i < 9; i++)
+	inb(ioaddr+i);
+    inw(ioaddr + 10);
+    inw(ioaddr + 12);
+
+    /* Switch to register set 1 for normal use. */
+    EL3WINDOW(1);
+
+    set_rx_mode(dev);
+    outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
+    outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
+    outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
+    /* Allow status bits to be seen. */
+    outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
+    /* Ack all pending events, and set active indicator mask. */
+    outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
+	 ioaddr + EL3_CMD);
+    outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
+	 | AdapterFailure, ioaddr + EL3_CMD);
+}
+
+static void netdev_get_drvinfo(struct net_device *dev,
+			       struct ethtool_drvinfo *info)
+{
+	strcpy(info->driver, DRV_NAME);
+	strcpy(info->version, DRV_VERSION);
+	sprintf(info->bus_info, "PCMCIA 0x%lx", dev->base_addr);
+}
+
+static const struct ethtool_ops netdev_ethtool_ops = {
+	.get_drvinfo		= netdev_get_drvinfo,
+};
+
+static int el3_config(struct net_device *dev, struct ifmap *map)
+{
+    if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
+	if (map->port <= 3) {
+	    dev->if_port = map->port;
+	    netdev_info(dev, "switched to %s port\n", if_names[dev->if_port]);
+	    tc589_set_xcvr(dev, dev->if_port);
+	} else
+	    return -EINVAL;
+    }
+    return 0;
+}
+
+static int el3_open(struct net_device *dev)
+{
+    struct el3_private *lp = netdev_priv(dev);
+    struct pcmcia_device *link = lp->p_dev;
+
+    if (!pcmcia_dev_present(link))
+	return -ENODEV;
+
+    link->open++;
+    netif_start_queue(dev);
+
+    tc589_reset(dev);
+    init_timer(&lp->media);
+    lp->media.function = media_check;
+    lp->media.data = (unsigned long) dev;
+    lp->media.expires = jiffies + HZ;
+    add_timer(&lp->media);
+
+    dev_dbg(&link->dev, "%s: opened, status %4.4x.\n",
+	  dev->name, inw(dev->base_addr + EL3_STATUS));
+
+    return 0;
+}
+
+static void el3_tx_timeout(struct net_device *dev)
+{
+    unsigned int ioaddr = dev->base_addr;
+
+    netdev_warn(dev, "Transmit timed out!\n");
+    dump_status(dev);
+    dev->stats.tx_errors++;
+    dev->trans_start = jiffies; /* prevent tx timeout */
+    /* Issue TX_RESET and TX_START commands. */
+    tc589_wait_for_completion(dev, TxReset);
+    outw(TxEnable, ioaddr + EL3_CMD);
+    netif_wake_queue(dev);
+}
+
+static void pop_tx_status(struct net_device *dev)
+{
+    unsigned int ioaddr = dev->base_addr;
+    int i;
+
+    /* Clear the Tx status stack. */
+    for (i = 32; i > 0; i--) {
+	u_char tx_status = inb(ioaddr + TX_STATUS);
+	if (!(tx_status & 0x84)) break;
+	/* reset transmitter on jabber error or underrun */
+	if (tx_status & 0x30)
+		tc589_wait_for_completion(dev, TxReset);
+	if (tx_status & 0x38) {
+		netdev_dbg(dev, "transmit error: status 0x%02x\n", tx_status);
+		outw(TxEnable, ioaddr + EL3_CMD);
+		dev->stats.tx_aborted_errors++;
+	}
+	outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
+    }
+}
+
+static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
+					struct net_device *dev)
+{
+    unsigned int ioaddr = dev->base_addr;
+    struct el3_private *priv = netdev_priv(dev);
+    unsigned long flags;
+
+    netdev_dbg(dev, "el3_start_xmit(length = %ld) called, status %4.4x.\n",
+	       (long)skb->len, inw(ioaddr + EL3_STATUS));
+
+    spin_lock_irqsave(&priv->lock, flags);
+
+    dev->stats.tx_bytes += skb->len;
+
+    /* Put out the doubleword header... */
+    outw(skb->len, ioaddr + TX_FIFO);
+    outw(0x00, ioaddr + TX_FIFO);
+    /* ... and the packet rounded to a doubleword. */
+    outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
+
+    if (inw(ioaddr + TX_FREE) <= 1536) {
+	netif_stop_queue(dev);
+	/* Interrupt us when the FIFO has room for max-sized packet. */
+	outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
+    }
+
+    pop_tx_status(dev);
+    spin_unlock_irqrestore(&priv->lock, flags);
+    dev_kfree_skb(skb);
+
+    return NETDEV_TX_OK;
+}
+
+/* The EL3 interrupt handler. */
+static irqreturn_t el3_interrupt(int irq, void *dev_id)
+{
+    struct net_device *dev = (struct net_device *) dev_id;
+    struct el3_private *lp = netdev_priv(dev);
+    unsigned int ioaddr;
+    __u16 status;
+    int i = 0, handled = 1;
+
+    if (!netif_device_present(dev))
+	return IRQ_NONE;
+
+    ioaddr = dev->base_addr;
+
+    netdev_dbg(dev, "interrupt, status %4.4x.\n", inw(ioaddr + EL3_STATUS));
+
+    spin_lock(&lp->lock);
+    while ((status = inw(ioaddr + EL3_STATUS)) &
+	(IntLatch | RxComplete | StatsFull)) {
+	if ((status & 0xe000) != 0x2000) {
+		netdev_dbg(dev, "interrupt from dead card\n");
+		handled = 0;
+		break;
+	}
+	if (status & RxComplete)
+		el3_rx(dev);
+	if (status & TxAvailable) {
+		netdev_dbg(dev, "    TX room bit was handled.\n");
+		/* There's room in the FIFO for a full-sized packet. */
+		outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
+		netif_wake_queue(dev);
+	}
+	if (status & TxComplete)
+		pop_tx_status(dev);
+	if (status & (AdapterFailure | RxEarly | StatsFull)) {
+	    /* Handle all uncommon interrupts. */
+	    if (status & StatsFull)		/* Empty statistics. */
+		update_stats(dev);
+	    if (status & RxEarly) {		/* Rx early is unused. */
+		el3_rx(dev);
+		outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
+	    }
+	    if (status & AdapterFailure) {
+		u16 fifo_diag;
+		EL3WINDOW(4);
+		fifo_diag = inw(ioaddr + 4);
+		EL3WINDOW(1);
+		netdev_warn(dev, "adapter failure, FIFO diagnostic register %04x.\n",
+			    fifo_diag);
+		if (fifo_diag & 0x0400) {
+		    /* Tx overrun */
+		    tc589_wait_for_completion(dev, TxReset);
+		    outw(TxEnable, ioaddr + EL3_CMD);
+		}
+		if (fifo_diag & 0x2000) {
+		    /* Rx underrun */
+		    tc589_wait_for_completion(dev, RxReset);
+		    set_rx_mode(dev);
+		    outw(RxEnable, ioaddr + EL3_CMD);
+		}
+		outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
+	    }
+	}
+	if (++i > 10) {
+		netdev_err(dev, "infinite loop in interrupt, status %4.4x.\n",
+			   status);
+		/* Clear all interrupts */
+		outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
+		break;
+	}
+	/* Acknowledge the IRQ. */
+	outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
+    }
+    lp->last_irq = jiffies;
+    spin_unlock(&lp->lock);
+    netdev_dbg(dev, "exiting interrupt, status %4.4x.\n",
+	       inw(ioaddr + EL3_STATUS));
+    return IRQ_RETVAL(handled);
+}
+
+static void media_check(unsigned long arg)
+{
+    struct net_device *dev = (struct net_device *)(arg);
+    struct el3_private *lp = netdev_priv(dev);
+    unsigned int ioaddr = dev->base_addr;
+    u16 media, errs;
+    unsigned long flags;
+
+    if (!netif_device_present(dev)) goto reschedule;
+
+    /* Check for pending interrupt with expired latency timer: with
+       this, we can limp along even if the interrupt is blocked */
+    if ((inw(ioaddr + EL3_STATUS) & IntLatch) &&
+	(inb(ioaddr + EL3_TIMER) == 0xff)) {
+	if (!lp->fast_poll)
+		netdev_warn(dev, "interrupt(s) dropped!\n");
+
+	local_irq_save(flags);
+	el3_interrupt(dev->irq, dev);
+	local_irq_restore(flags);
+
+	lp->fast_poll = HZ;
+    }
+    if (lp->fast_poll) {
+	lp->fast_poll--;
+	lp->media.expires = jiffies + HZ/100;
+	add_timer(&lp->media);
+	return;
+    }
+
+    /* lp->lock guards the EL3 window. Window should always be 1 except
+       when the lock is held */
+    spin_lock_irqsave(&lp->lock, flags);
+    EL3WINDOW(4);
+    media = inw(ioaddr+WN4_MEDIA) & 0xc810;
+
+    /* Ignore collisions unless we've had no irq's recently */
+    if (time_before(jiffies, lp->last_irq + HZ)) {
+	media &= ~0x0010;
+    } else {
+	/* Try harder to detect carrier errors */
+	EL3WINDOW(6);
+	outw(StatsDisable, ioaddr + EL3_CMD);
+	errs = inb(ioaddr + 0);
+	outw(StatsEnable, ioaddr + EL3_CMD);
+	dev->stats.tx_carrier_errors += errs;
+	if (errs || (lp->media_status & 0x0010)) media |= 0x0010;
+    }
+
+    if (media != lp->media_status) {
+	if ((media & lp->media_status & 0x8000) &&
+	    ((lp->media_status ^ media) & 0x0800))
+		netdev_info(dev, "%s link beat\n",
+			    (lp->media_status & 0x0800 ? "lost" : "found"));
+	else if ((media & lp->media_status & 0x4000) &&
+		 ((lp->media_status ^ media) & 0x0010))
+		netdev_info(dev, "coax cable %s\n",
+			    (lp->media_status & 0x0010 ? "ok" : "problem"));
+	if (dev->if_port == 0) {
+	    if (media & 0x8000) {
+		if (media & 0x0800)
+			netdev_info(dev, "flipped to 10baseT\n");
+		else
+			tc589_set_xcvr(dev, 2);
+	    } else if (media & 0x4000) {
+		if (media & 0x0010)
+		    tc589_set_xcvr(dev, 1);
+		else
+		    netdev_info(dev, "flipped to 10base2\n");
+	    }
+	}
+	lp->media_status = media;
+    }
+
+    EL3WINDOW(1);
+    spin_unlock_irqrestore(&lp->lock, flags);
+
+reschedule:
+    lp->media.expires = jiffies + HZ;
+    add_timer(&lp->media);
+}
+
+static struct net_device_stats *el3_get_stats(struct net_device *dev)
+{
+    struct el3_private *lp = netdev_priv(dev);
+    unsigned long flags;
+    struct pcmcia_device *link = lp->p_dev;
+
+    if (pcmcia_dev_present(link)) {
+	spin_lock_irqsave(&lp->lock, flags);
+	update_stats(dev);
+	spin_unlock_irqrestore(&lp->lock, flags);
+    }
+    return &dev->stats;
+}
+
+/*
+  Update statistics.  We change to register window 6, so this should be run
+  single-threaded if the device is active. This is expected to be a rare
+  operation, and it's simpler for the rest of the driver to assume that
+  window 1 is always valid rather than use a special window-state variable.
+
+  Caller must hold the lock for this
+*/
+static void update_stats(struct net_device *dev)
+{
+    unsigned int ioaddr = dev->base_addr;
+
+    netdev_dbg(dev, "updating the statistics.\n");
+    /* Turn off statistics updates while reading. */
+    outw(StatsDisable, ioaddr + EL3_CMD);
+    /* Switch to the stats window, and read everything. */
+    EL3WINDOW(6);
+    dev->stats.tx_carrier_errors	+= inb(ioaddr + 0);
+    dev->stats.tx_heartbeat_errors	+= inb(ioaddr + 1);
+    /* Multiple collisions. */		inb(ioaddr + 2);
+    dev->stats.collisions		+= inb(ioaddr + 3);
+    dev->stats.tx_window_errors		+= inb(ioaddr + 4);
+    dev->stats.rx_fifo_errors		+= inb(ioaddr + 5);
+    dev->stats.tx_packets		+= inb(ioaddr + 6);
+    /* Rx packets   */			inb(ioaddr + 7);
+    /* Tx deferrals */			inb(ioaddr + 8);
+    /* Rx octets */			inw(ioaddr + 10);
+    /* Tx octets */			inw(ioaddr + 12);
+
+    /* Back to window 1, and turn statistics back on. */
+    EL3WINDOW(1);
+    outw(StatsEnable, ioaddr + EL3_CMD);
+}
+
+static int el3_rx(struct net_device *dev)
+{
+    unsigned int ioaddr = dev->base_addr;
+    int worklimit = 32;
+    short rx_status;
+
+    netdev_dbg(dev, "in rx_packet(), status %4.4x, rx_status %4.4x.\n",
+	       inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
+    while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
+		    worklimit > 0) {
+	worklimit--;
+	if (rx_status & 0x4000) { /* Error, update stats. */
+	    short error = rx_status & 0x3800;
+	    dev->stats.rx_errors++;
+	    switch (error) {
+	    case 0x0000:	dev->stats.rx_over_errors++; break;
+	    case 0x0800:	dev->stats.rx_length_errors++; break;
+	    case 0x1000:	dev->stats.rx_frame_errors++; break;
+	    case 0x1800:	dev->stats.rx_length_errors++; break;
+	    case 0x2000:	dev->stats.rx_frame_errors++; break;
+	    case 0x2800:	dev->stats.rx_crc_errors++; break;
+	    }
+	} else {
+	    short pkt_len = rx_status & 0x7ff;
+	    struct sk_buff *skb;
+
+	    skb = dev_alloc_skb(pkt_len+5);
+
+	    netdev_dbg(dev, "    Receiving packet size %d status %4.4x.\n",
+		       pkt_len, rx_status);
+	    if (skb != NULL) {
+		skb_reserve(skb, 2);
+		insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
+			(pkt_len+3)>>2);
+		skb->protocol = eth_type_trans(skb, dev);
+		netif_rx(skb);
+		dev->stats.rx_packets++;
+		dev->stats.rx_bytes += pkt_len;
+	    } else {
+		netdev_dbg(dev, "couldn't allocate a sk_buff of size %d.\n",
+			   pkt_len);
+		dev->stats.rx_dropped++;
+	    }
+	}
+	/* Pop the top of the Rx FIFO */
+	tc589_wait_for_completion(dev, RxDiscard);
+    }
+    if (worklimit == 0)
+	netdev_warn(dev, "too much work in el3_rx!\n");
+    return 0;
+}
+
+static void set_rx_mode(struct net_device *dev)
+{
+    unsigned int ioaddr = dev->base_addr;
+    u16 opts = SetRxFilter | RxStation | RxBroadcast;
+
+    if (dev->flags & IFF_PROMISC)
+	opts |= RxMulticast | RxProm;
+    else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI))
+	opts |= RxMulticast;
+    outw(opts, ioaddr + EL3_CMD);
+}
+
+static void set_multicast_list(struct net_device *dev)
+{
+	struct el3_private *priv = netdev_priv(dev);
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	set_rx_mode(dev);
+	spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+static int el3_close(struct net_device *dev)
+{
+    struct el3_private *lp = netdev_priv(dev);
+    struct pcmcia_device *link = lp->p_dev;
+    unsigned int ioaddr = dev->base_addr;
+
+    dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name);
+
+    if (pcmcia_dev_present(link)) {
+	/* Turn off statistics ASAP.  We update dev->stats below. */
+	outw(StatsDisable, ioaddr + EL3_CMD);
+
+	/* Disable the receiver and transmitter. */
+	outw(RxDisable, ioaddr + EL3_CMD);
+	outw(TxDisable, ioaddr + EL3_CMD);
+
+	if (dev->if_port == 2)
+	    /* Turn off thinnet power.  Green! */
+	    outw(StopCoax, ioaddr + EL3_CMD);
+	else if (dev->if_port == 1) {
+	    /* Disable link beat and jabber */
+	    EL3WINDOW(4);
+	    outw(0, ioaddr + WN4_MEDIA);
+	}
+
+	/* Switching back to window 0 disables the IRQ. */
+	EL3WINDOW(0);
+	/* But we explicitly zero the IRQ line select anyway. */
+	outw(0x0f00, ioaddr + WN0_IRQ);
+
+	/* Check if the card still exists */
+	if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000)
+	    update_stats(dev);
+    }
+
+    link->open--;
+    netif_stop_queue(dev);
+    del_timer_sync(&lp->media);
+
+    return 0;
+}
+
+static const struct pcmcia_device_id tc589_ids[] = {
+	PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562),
+	PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77),
+	PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589),
+	PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202),
+	PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "cis/3CXEM556.cis"),
+	PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "cis/3CXEM556.cis"),
+	PCMCIA_DEVICE_NULL,
+};
+MODULE_DEVICE_TABLE(pcmcia, tc589_ids);
+
+static struct pcmcia_driver tc589_driver = {
+	.owner		= THIS_MODULE,
+	.name		= "3c589_cs",
+	.probe		= tc589_probe,
+	.remove		= tc589_detach,
+	.id_table	= tc589_ids,
+	.suspend	= tc589_suspend,
+	.resume		= tc589_resume,
+};
+
+static int __init init_tc589(void)
+{
+	return pcmcia_register_driver(&tc589_driver);
+}
+
+static void __exit exit_tc589(void)
+{
+	pcmcia_unregister_driver(&tc589_driver);
+}
+
+module_init(init_tc589);
+module_exit(exit_tc589);