--- /dev/null
+/* ======================================================================
+ *
+ * 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/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 <linux/uaccess.h>
+#include <linux/io.h>
+
+#include <pcmcia/cistpl.h>
+#include <pcmcia/cisreg.h>
+#include <pcmcia/ciscode.h>
+#include <pcmcia/ds.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_rx_mode = 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;
+
+ dev->ethtool_ops = &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)
+{
+ strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
+ strlcpy(info->version, DRV_VERSION, sizeof(info->version));
+ snprintf(info->bus_info, sizeof(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);
+ setup_timer(&lp->media, media_check, (unsigned long)dev);
+ mod_timer(&lp->media, jiffies + HZ);
+
+ 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 = netdev_alloc_skb(dev, 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,
+};
+module_pcmcia_driver(tc589_driver);
Code Review / kvmfornfv.git / blobdiff