patch-2.3.18 linux/drivers/net/pcmcia/3c589_cs.c
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- Lines: 1178
- Date:
Fri Sep 10 10:33:04 1999
- Orig file:
v2.3.17/linux/drivers/net/pcmcia/3c589_cs.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.3.17/linux/drivers/net/pcmcia/3c589_cs.c linux/drivers/net/pcmcia/3c589_cs.c
@@ -0,0 +1,1177 @@
+/*======================================================================
+
+ A PCMCIA ethernet driver for the 3com 3c589 card.
+
+ Copyright (C) 1998 David A. Hinds -- dhinds@hyper.stanford.edu
+
+ 3c589_cs.c 1.126 1999/06/14 17:35:34
+
+ 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 Public License,
+ incorporated herein by reference.
+ Donald Becker may be reached at becker@cesdis1.gsfc.nasa.gov
+
+======================================================================*/
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/ptrace.h>
+#include <linux/malloc.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/in.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/bitops.h>
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/if_arp.h>
+#include <linux/ioport.h>
+
+#include <pcmcia/version.h>
+#include <pcmcia/cs_types.h>
+#include <pcmcia/cs.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 ID_PORT 0x100
+#define EEPROM_READ 0x80
+
+#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 {
+ dev_node_t node;
+ struct net_device_stats stats;
+ /* For transceiver monitoring */
+ struct timer_list media;
+ u_short media_status;
+ u_short fast_poll;
+ u_long last_irq;
+};
+
+static char *if_names[] = { "auto", "10baseT", "10base2", "AUI" };
+
+#ifdef PCMCIA_DEBUG
+static int pc_debug = PCMCIA_DEBUG;
+MODULE_PARM(pc_debug, "i");
+#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
+static char *version =
+"3c589_cs.c 1.126 1999/06/14 17:35:34 (David Hinds)";
+#else
+#define DEBUG(n, args...)
+#endif
+
+/*====================================================================*/
+
+/* Parameters that can be set with 'insmod' */
+
+/* Special hook for setting if_port when module is loaded */
+static int if_port = 0;
+
+/* Bit map of interrupts to choose from */
+static u_int irq_mask = 0xdeb8;
+static int irq_list[4] = { -1 };
+
+MODULE_PARM(if_port, "i");
+MODULE_PARM(irq_mask, "i");
+MODULE_PARM(irq_list, "1-4i");
+
+/*====================================================================*/
+
+static void tc589_config(dev_link_t *link);
+static void tc589_release(u_long arg);
+static int tc589_event(event_t event, int priority,
+ event_callback_args_t *args);
+
+static ushort read_eeprom(short ioaddr, int index);
+static void tc589_reset(struct net_device *dev);
+static void media_check(u_long arg);
+static int el3_config(struct net_device *dev, struct ifmap *map);
+static int el3_open(struct net_device *dev);
+static int el3_start_xmit(struct sk_buff *skb, struct net_device *dev);
+static void el3_interrupt(int irq, void *dev_id, struct pt_regs *regs);
+static void update_stats(int addr, 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 set_multicast_list(struct net_device *dev);
+
+static dev_info_t dev_info = "3c589_cs";
+
+static dev_link_t *tc589_attach(void);
+static void tc589_detach(dev_link_t *);
+
+static dev_link_t *dev_list = NULL;
+
+/*======================================================================
+
+ This bit of code is used to avoid unregistering network devices
+ at inappropriate times. 2.2 and later kernels are fairly picky
+ about when this can happen.
+
+======================================================================*/
+
+static void flush_stale_links(void)
+{
+ dev_link_t *link, *next;
+ for (link = dev_list; link; link = next) {
+ next = link->next;
+ if (link->state & DEV_STALE_LINK)
+ tc589_detach(link);
+ }
+}
+
+/*====================================================================*/
+
+static void cs_error(client_handle_t handle, int func, int ret)
+{
+ error_info_t err = { func, ret };
+ CardServices(ReportError, handle, &err);
+}
+
+/*======================================================================
+
+ We never need to do anything when a tc589 device is "initialized"
+ by the net software, because we only register already-found cards.
+
+======================================================================*/
+
+static int tc589_init(struct net_device *dev)
+{
+ return 0;
+}
+
+/*======================================================================
+
+ tc589_attach() creates an "instance" of the driver, allocating
+ local data structures for one device. The device is registered
+ with Card Services.
+
+======================================================================*/
+
+static dev_link_t *tc589_attach(void)
+{
+ client_reg_t client_reg;
+ dev_link_t *link;
+ struct net_device *dev;
+ int i, ret;
+
+ DEBUG(0, "3c589_attach()\n");
+ flush_stale_links();
+
+ /* Create new ethernet device */
+ link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL);
+ memset(link, 0, sizeof(struct dev_link_t));
+ link->release.function = &tc589_release;
+ link->release.data = (u_long)link;
+ link->io.NumPorts1 = 16;
+ link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
+ link->io.IOAddrLines = 4;
+ link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
+ link->irq.IRQInfo1 = IRQ_INFO2_VALID|IRQ_LEVEL_ID;
+ if (irq_list[0] == -1)
+ link->irq.IRQInfo2 = irq_mask;
+ else
+ for (i = 0; i < 4; i++)
+ link->irq.IRQInfo2 |= 1 << irq_list[i];
+ link->irq.Handler = &el3_interrupt;
+ link->conf.Attributes = CONF_ENABLE_IRQ;
+ link->conf.Vcc = 50;
+ link->conf.IntType = INT_MEMORY_AND_IO;
+ link->conf.ConfigIndex = 1;
+ link->conf.Present = PRESENT_OPTION;
+
+ dev = kmalloc(sizeof(struct net_device), GFP_KERNEL);
+ memset(dev, 0, sizeof(struct net_device));
+
+ /* Make up a EL3-specific-data structure. */
+ dev->priv = kmalloc(sizeof(struct el3_private), GFP_KERNEL);
+ memset(dev->priv, 0, sizeof(struct el3_private));
+
+ /* The EL3-specific entries in the device structure. */
+ dev->hard_start_xmit = &el3_start_xmit;
+ dev->set_config = &el3_config;
+ dev->get_stats = &el3_get_stats;
+ dev->set_multicast_list = &set_multicast_list;
+ ether_setup(dev);
+ dev->name = ((struct el3_private *)dev->priv)->node.dev_name;
+ dev->init = &tc589_init;
+ dev->open = &el3_open;
+ dev->stop = &el3_close;
+ dev->tbusy = 1;
+ link->priv = link->irq.Instance = dev;
+
+ /* Register with Card Services */
+ link->next = dev_list;
+ dev_list = link;
+ client_reg.dev_info = &dev_info;
+ client_reg.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE;
+ client_reg.EventMask =
+ CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
+ CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
+ CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
+ client_reg.event_handler = &tc589_event;
+ client_reg.Version = 0x0210;
+ client_reg.event_callback_args.client_data = link;
+ ret = CardServices(RegisterClient, &link->handle, &client_reg);
+ if (ret != 0) {
+ cs_error(link->handle, RegisterClient, ret);
+ tc589_detach(link);
+ return NULL;
+ }
+
+ return link;
+} /* tc589_attach */
+
+/*======================================================================
+
+ This deletes a driver "instance". The device is de-registered
+ with Card Services. If it has been released, all local data
+ structures are freed. Otherwise, the structures will be freed
+ when the device is released.
+
+======================================================================*/
+
+static void tc589_detach(dev_link_t *link)
+{
+ dev_link_t **linkp;
+ long flags;
+
+ DEBUG(0, "3c589_detach(0x%p)\n", link);
+
+ /* Locate device structure */
+ for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
+ if (*linkp == link) break;
+ if (*linkp == NULL)
+ return;
+
+ save_flags(flags);
+ cli();
+ if (link->state & DEV_RELEASE_PENDING) {
+ del_timer(&link->release);
+ link->state &= ~DEV_RELEASE_PENDING;
+ }
+ restore_flags(flags);
+
+ if (link->state & DEV_CONFIG) {
+ tc589_release((u_long)link);
+ if (link->state & DEV_STALE_CONFIG) {
+ link->state |= DEV_STALE_LINK;
+ return;
+ }
+ }
+
+ if (link->handle)
+ CardServices(DeregisterClient, link->handle);
+
+ /* Unlink device structure, free bits */
+ *linkp = link->next;
+ if (link->priv) {
+ struct net_device *dev = link->priv;
+ if (link->dev != NULL)
+ unregister_netdev(dev);
+ if (dev->priv)
+ kfree_s(dev->priv, sizeof(struct el3_private));
+ kfree_s(link->priv, sizeof(struct net_device));
+ }
+ kfree_s(link, sizeof(struct dev_link_t));
+
+} /* tc589_detach */
+
+/*======================================================================
+
+ tc589_config() is scheduled to run after a CARD_INSERTION event
+ is received, to configure the PCMCIA socket, and to make the
+ ethernet device available to the system.
+
+======================================================================*/
+
+#define CS_CHECK(fn, args...) \
+while ((last_ret=CardServices(last_fn=(fn), args))!=0) goto cs_failed
+
+static void tc589_config(dev_link_t *link)
+{
+ client_handle_t handle;
+ struct net_device *dev;
+ tuple_t tuple;
+ cisparse_t parse;
+ u_short buf[32];
+ int last_fn, last_ret, i, j, multi = 0;
+ short ioaddr, *phys_addr;
+ char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
+
+ handle = link->handle;
+ dev = link->priv;
+ phys_addr = (short *)dev->dev_addr;
+
+ DEBUG(0, "3c589_config(0x%p)\n", link);
+
+ tuple.Attributes = 0;
+ tuple.DesiredTuple = CISTPL_CONFIG;
+ CS_CHECK(GetFirstTuple, handle, &tuple);
+ tuple.TupleData = (cisdata_t *)buf;
+ tuple.TupleDataMax = sizeof(buf);
+ tuple.TupleOffset = 0;
+ CS_CHECK(GetTupleData, handle, &tuple);
+ CS_CHECK(ParseTuple, handle, &tuple, &parse);
+ link->conf.ConfigBase = parse.config.base;
+ link->conf.Present = parse.config.rmask[0];
+
+ /* Is this a 3c562? */
+ tuple.DesiredTuple = CISTPL_MANFID;
+ tuple.Attributes = TUPLE_RETURN_COMMON;
+ if ((CardServices(GetFirstTuple, handle, &tuple) == CS_SUCCESS) &&
+ (CardServices(GetTupleData, handle, &tuple) == CS_SUCCESS)) {
+ if (le16_to_cpu(buf[0]) != MANFID_3COM)
+ printk(KERN_INFO "3c589_cs: hmmm, is this really a "
+ "3Com card??\n");
+ multi = (le16_to_cpu(buf[1]) == PRODID_3COM_3C562);
+ }
+
+ /* Configure card */
+ link->state |= DEV_CONFIG;
+
+ /* For the 3c562, the base address must be xx00-xx7f */
+ for (i = j = 0; j < 0x400; j += 0x10) {
+ if (multi && (j & 0x80)) continue;
+ link->io.BasePort1 = j ^ 0x300;
+ i = CardServices(RequestIO, link->handle, &link->io);
+ if (i == CS_SUCCESS) break;
+ }
+ if (i != CS_SUCCESS) {
+ cs_error(link->handle, RequestIO, i);
+ goto failed;
+ }
+ CS_CHECK(RequestIRQ, link->handle, &link->irq);
+ CS_CHECK(RequestConfiguration, link->handle, &link->conf);
+
+ dev->irq = link->irq.AssignedIRQ;
+ dev->base_addr = link->io.BasePort1;
+ dev->tbusy = 0;
+ if (register_netdev(dev) != 0) {
+ printk(KERN_NOTICE "3c589_cs: register_netdev() failed\n");
+ goto failed;
+ }
+
+ link->state &= ~DEV_CONFIG_PENDING;
+ 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. */
+ tuple.DesiredTuple = 0x88;
+ if (CardServices(GetFirstTuple, handle, &tuple) == CS_SUCCESS) {
+ CardServices(GetTupleData, handle, &tuple);
+ for (i = 0; i < 3; i++)
+ phys_addr[i] = htons(buf[i]);
+ } else {
+ for (i = 0; i < 3; i++)
+ phys_addr[i] = htons(read_eeprom(ioaddr, i));
+ if (phys_addr[0] == 0x6060) {
+ printk(KERN_NOTICE "3c589_cs: IO port conflict at 0x%03lx"
+ "-0x%03lx\n", dev->base_addr, dev->base_addr+15);
+ goto failed;
+ }
+ }
+
+ link->dev = &((struct el3_private *)dev->priv)->node;
+
+ /* 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);
+
+ /* 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
+ printk(KERN_NOTICE "3c589_cs: invalid if_port requested\n");
+
+ printk(KERN_INFO "%s: 3Com 3c%s, io %#3lx, irq %d, %s xcvr, "
+ "hw_addr ", dev->name, (multi ? "562" : "589"),
+ dev->base_addr, dev->irq, if_names[dev->if_port]);
+ for (i = 0; i < 6; i++)
+ printk("%02X%s", dev->dev_addr[i], ((i<5) ? ":" : "\n"));
+ i = inl(ioaddr);
+ printk(KERN_INFO " %dK FIFO split %s Rx:Tx\n",
+ (i & 7) ? 32 : 8, ram_split[(i >> 16) & 3]);
+ return;
+
+cs_failed:
+ cs_error(link->handle, last_fn, last_ret);
+failed:
+ tc589_release((u_long)link);
+ return;
+
+} /* tc589_config */
+
+/*======================================================================
+
+ After a card is removed, tc589_release() will unregister the net
+ device, and release the PCMCIA configuration. If the device is
+ still open, this will be postponed until it is closed.
+
+======================================================================*/
+
+static void tc589_release(u_long arg)
+{
+ dev_link_t *link = (dev_link_t *)arg;
+
+ DEBUG(0, "3c589_release(0x%p)\n", link);
+
+ if (link->open) {
+ DEBUG(1, "3c589_cs: release postponed, '%s' still open\n",
+ link->dev->dev_name);
+ link->state |= DEV_STALE_CONFIG;
+ return;
+ }
+
+ CardServices(ReleaseConfiguration, link->handle);
+ CardServices(ReleaseIO, link->handle, &link->io);
+ CardServices(ReleaseIRQ, link->handle, &link->irq);
+
+ link->state &= ~(DEV_CONFIG | DEV_RELEASE_PENDING);
+
+} /* tc589_release */
+
+/*======================================================================
+
+ The card status event handler. Mostly, this schedules other
+ stuff to run after an event is received. A CARD_REMOVAL event
+ also sets some flags to discourage the net drivers from trying
+ to talk to the card any more.
+
+======================================================================*/
+
+static int tc589_event(event_t event, int priority,
+ event_callback_args_t *args)
+{
+ dev_link_t *link = args->client_data;
+ struct net_device *dev = link->priv;
+
+ DEBUG(1, "3c589_event(0x%06x)\n", event);
+
+ switch (event) {
+ case CS_EVENT_CARD_REMOVAL:
+ link->state &= ~DEV_PRESENT;
+ if (link->state & DEV_CONFIG) {
+ dev->tbusy = 1; dev->start = 0;
+ link->release.expires = jiffies + (HZ/20);
+ add_timer(&link->release);
+ }
+ break;
+ case CS_EVENT_CARD_INSERTION:
+ link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
+ tc589_config(link);
+ break;
+ case CS_EVENT_PM_SUSPEND:
+ link->state |= DEV_SUSPEND;
+ /* Fall through... */
+ case CS_EVENT_RESET_PHYSICAL:
+ if (link->state & DEV_CONFIG) {
+ if (link->open) {
+ dev->tbusy = 1; dev->start = 0;
+ }
+ CardServices(ReleaseConfiguration, link->handle);
+ }
+ break;
+ case CS_EVENT_PM_RESUME:
+ link->state &= ~DEV_SUSPEND;
+ /* Fall through... */
+ case CS_EVENT_CARD_RESET:
+ if (link->state & DEV_CONFIG) {
+ CardServices(RequestConfiguration, link->handle, &link->conf);
+ if (link->open) {
+ tc589_reset(dev);
+ dev->tbusy = 0; dev->start = 1;
+ }
+ }
+ break;
+ }
+ return 0;
+} /* tc589_event */
+
+/*====================================================================*/
+
+/*
+ Use this for commands that may take time to finish
+*/
+static void 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)
+ printk(KERN_NOTICE "%s: command 0x%04x did not complete!\n",
+ dev->name, cmd);
+}
+
+/*
+ Read a word from the EEPROM using the regular EEPROM access register.
+ Assume that we are in register window zero.
+*/
+static ushort read_eeprom(short 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) & 0x8000) == 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 = (struct el3_private *)dev->priv;
+ ushort 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);
+ lp->media_status = (if_port < 2) ? 0x8800 : 0x4800;
+ lp->last_irq = jiffies;
+}
+
+static void dump_status(struct net_device *dev)
+{
+ int ioaddr = dev->base_addr;
+ EL3WINDOW(1);
+ printk(KERN_INFO " 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);
+ printk(KERN_INFO " 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)
+{
+ ushort 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);
+
+ /* Accept b-cast and phys addr only. */
+ outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD);
+ 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 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;
+ printk(KERN_INFO "%s: switched to %s port\n",
+ dev->name, 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 = (struct el3_private *)dev->priv;
+ dev_link_t *link;
+
+ for (link = dev_list; link; link = link->next)
+ if (link->priv == dev) break;
+ if (!DEV_OK(link))
+ return -ENODEV;
+
+ link->open++;
+ MOD_INC_USE_COUNT;
+ dev->interrupt = 0; dev->tbusy = 0; dev->start = 1;
+
+ tc589_reset(dev);
+ lp->media.function = &media_check;
+ lp->media.data = (u_long)dev;
+ lp->media.expires = jiffies + HZ;
+ add_timer(&lp->media);
+
+ DEBUG(1, "%s: opened, status %4.4x.\n",
+ dev->name, inw(dev->base_addr + EL3_STATUS));
+
+ return 0; /* Always succeed */
+}
+
+static void el3_tx_timeout(struct net_device *dev)
+{
+ struct el3_private *lp = (struct el3_private *)dev->priv;
+ int ioaddr = dev->base_addr;
+
+ printk(KERN_NOTICE "%s: Transmit timed out!\n", dev->name);
+ dump_status(dev);
+ lp->stats.tx_errors++;
+ dev->trans_start = jiffies;
+ /* Issue TX_RESET and TX_START commands. */
+ wait_for_completion(dev, TxReset);
+ outw(TxEnable, ioaddr + EL3_CMD);
+ dev->tbusy = 0;
+}
+
+static void pop_tx_status(struct net_device *dev)
+{
+ struct el3_private *lp = (struct el3_private *)dev->priv;
+ 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)
+ wait_for_completion(dev, TxReset);
+ if (tx_status & 0x38) {
+ DEBUG(1, "%s: transmit error: status 0x%02x\n",
+ dev->name, tx_status);
+ outw(TxEnable, ioaddr + EL3_CMD);
+ lp->stats.tx_aborted_errors++;
+ }
+ outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
+ }
+}
+
+static int el3_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct el3_private *lp = (struct el3_private *)dev->priv;
+ int ioaddr = dev->base_addr;
+
+ /* Transmitter timeout, serious problems. */
+ if (dev->tbusy) {
+ if (jiffies - dev->trans_start < TX_TIMEOUT)
+ return 1;
+ el3_tx_timeout(dev);
+ }
+
+ DEBUG(3, "%s: el3_start_xmit(length = %ld) called, "
+ "status %4.4x.\n", dev->name, (long)skb->len,
+ inw(ioaddr + EL3_STATUS));
+
+ /* Avoid timer-based retransmission conflicts. */
+ if (test_and_set_bit(0, (void*)&dev->tbusy) != 0)
+ printk(KERN_NOTICE "%s: transmitter access conflict.\n",
+ dev->name);
+ else {
+ lp->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);
+
+ dev->trans_start = jiffies;
+ if (inw(ioaddr + TX_FREE) > 1536) {
+ dev->tbusy = 0;
+ } else
+ /* Interrupt us when the FIFO has room for max-sized packet. */
+ outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
+ }
+
+ dev_kfree_skb(skb);
+ pop_tx_status(dev);
+
+ return 0;
+}
+
+/* The EL3 interrupt handler. */
+static void el3_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct net_device *dev = (struct net_device *)dev_id;
+ struct el3_private *lp;
+ int ioaddr, status;
+ int i = 0;
+
+ if ((dev == NULL) || !dev->start)
+ return;
+ lp = (struct el3_private *)dev->priv;
+ ioaddr = dev->base_addr;
+
+#ifdef PCMCIA_DEBUG
+ if (dev->interrupt) {
+ printk(KERN_NOTICE "%s: re-entering the interrupt handler.\n",
+ dev->name);
+ return;
+ }
+ dev->interrupt = 1;
+ DEBUG(3, "%s: interrupt, status %4.4x.\n",
+ dev->name, inw(ioaddr + EL3_STATUS));
+#endif
+
+ while ((status = inw(ioaddr + EL3_STATUS)) &
+ (IntLatch | RxComplete | StatsFull)) {
+ if ((dev->start == 0) || ((status & 0xe000) != 0x2000)) {
+ DEBUG(1, "%s: interrupt from dead card\n", dev->name);
+ break;
+ }
+
+ if (status & RxComplete)
+ el3_rx(dev);
+
+ if (status & TxAvailable) {
+ DEBUG(3, " TX room bit was handled.\n");
+ /* There's room in the FIFO for a full-sized packet. */
+ outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
+ dev->tbusy = 0;
+ mark_bh(NET_BH);
+ }
+
+ if (status & TxComplete)
+ pop_tx_status(dev);
+
+ if (status & (AdapterFailure | RxEarly | StatsFull)) {
+ /* Handle all uncommon interrupts. */
+ if (status & StatsFull) /* Empty statistics. */
+ update_stats(ioaddr, 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);
+ printk(KERN_NOTICE "%s: adapter failure, FIFO diagnostic"
+ " register %04x.\n", dev->name, fifo_diag);
+ if (fifo_diag & 0x0400) {
+ /* Tx overrun */
+ wait_for_completion(dev, TxReset);
+ outw(TxEnable, ioaddr + EL3_CMD);
+ }
+ if (fifo_diag & 0x2000) {
+ /* Rx underrun */
+ wait_for_completion(dev, RxReset);
+ set_multicast_list(dev);
+ outw(RxEnable, ioaddr + EL3_CMD);
+ }
+ outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
+ }
+ }
+
+ if (++i > 10) {
+ printk(KERN_NOTICE "%s: infinite loop in interrupt, "
+ "status %4.4x.\n", dev->name, 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;
+#ifdef PCMCIA_DEBUG
+ DEBUG(3, "%s: exiting interrupt, status %4.4x.\n",
+ dev->name, inw(ioaddr + EL3_STATUS));
+ dev->interrupt = 0;
+#endif
+ return;
+}
+
+static void media_check(u_long arg)
+{
+ struct net_device *dev = (struct net_device *)(arg);
+ struct el3_private *lp = (struct el3_private *)dev->priv;
+ int ioaddr = dev->base_addr;
+ u_short media, errs;
+ u_long flags;
+
+ if (dev->start == 0) goto reschedule;
+
+ EL3WINDOW(1);
+ /* 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)
+ printk(KERN_INFO "%s: interrupt(s) dropped!\n", dev->name);
+ el3_interrupt(dev->irq, dev, NULL);
+ lp->fast_poll = HZ;
+ }
+ if (lp->fast_poll) {
+ lp->fast_poll--;
+ lp->media.expires = jiffies + 2;
+ add_timer(&lp->media);
+ return;
+ }
+
+ save_flags(flags);
+ cli();
+ EL3WINDOW(4);
+ media = inw(ioaddr+WN4_MEDIA) & 0xc810;
+
+ /* Ignore collisions unless we've had no irq's recently */
+ if (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);
+ lp->stats.tx_carrier_errors += errs;
+ if (errs) media |= 0x0010;
+ }
+ if (media != lp->media_status) {
+ if ((media & lp->media_status & 0x8000) &&
+ ((lp->media_status ^ media) & 0x0800))
+ printk(KERN_INFO "%s: %s link beat\n", dev->name,
+ (lp->media_status & 0x0800 ? "lost" : "found"));
+ else if ((media & lp->media_status & 0x4000) &&
+ ((lp->media_status ^ media) & 0x0010))
+ printk(KERN_INFO "%s: cable %s\n", dev->name,
+ (lp->media_status & 0x0010 ? "fixed" : "problem"));
+ if (dev->if_port == 0) {
+ if (media & 0x8000) {
+ if (media & 0x0800)
+ printk(KERN_INFO "%s: flipped to 10baseT\n",
+ dev->name);
+ else
+ tc589_set_xcvr(dev, 2);
+ }
+ if (media & 0x4000) {
+ if (media & 0x0010)
+ tc589_set_xcvr(dev, 1);
+ else
+ printk(KERN_INFO "%s: flipped to 10base2\n",
+ dev->name);
+ }
+ }
+ lp->media_status = media;
+ }
+
+ EL3WINDOW(1);
+ restore_flags(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 = (struct el3_private *)dev->priv;
+ unsigned long flags;
+ dev_link_t *link;
+
+ for (link = dev_list; link; link = link->next)
+ if (link->priv == dev) break;
+ if (DEV_OK(link)) {
+ save_flags(flags);
+ cli();
+ update_stats(dev->base_addr, dev);
+ restore_flags(flags);
+ }
+ return &lp->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.
+*/
+static void update_stats(int ioaddr, struct net_device *dev)
+{
+ struct el3_private *lp = (struct el3_private *)dev->priv;
+
+ DEBUG(2, "%s: updating the statistics.\n", dev->name);
+ /* Turn off statistics updates while reading. */
+ outw(StatsDisable, ioaddr + EL3_CMD);
+ /* Switch to the stats window, and read everything. */
+ EL3WINDOW(6);
+ lp->stats.tx_carrier_errors += inb(ioaddr + 0);
+ lp->stats.tx_heartbeat_errors += inb(ioaddr + 1);
+ /* Multiple collisions. */ inb(ioaddr + 2);
+ lp->stats.collisions += inb(ioaddr + 3);
+ lp->stats.tx_window_errors += inb(ioaddr + 4);
+ lp->stats.rx_fifo_errors += inb(ioaddr + 5);
+ lp->stats.tx_packets += inb(ioaddr + 6);
+ /* Rx packets */ inb(ioaddr + 7);
+ /* Tx deferrals */ inb(ioaddr + 8);
+ inw(ioaddr + 10); /* Total Rx and 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)
+{
+ struct el3_private *lp = (struct el3_private *)dev->priv;
+ int ioaddr = dev->base_addr;
+ int worklimit = 32;
+ short rx_status;
+
+ DEBUG(3, "%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n",
+ dev->name, inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
+ while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
+ (--worklimit >= 0)) {
+ if (rx_status & 0x4000) { /* Error, update stats. */
+ short error = rx_status & 0x3800;
+ lp->stats.rx_errors++;
+ switch (error) {
+ case 0x0000: lp->stats.rx_over_errors++; break;
+ case 0x0800: lp->stats.rx_length_errors++; break;
+ case 0x1000: lp->stats.rx_frame_errors++; break;
+ case 0x1800: lp->stats.rx_length_errors++; break;
+ case 0x2000: lp->stats.rx_frame_errors++; break;
+ case 0x2800: lp->stats.rx_crc_errors++; break;
+ }
+ } else {
+ short pkt_len = rx_status & 0x7ff;
+ struct sk_buff *skb;
+
+ skb = dev_alloc_skb(pkt_len+5);
+
+ DEBUG(3, " Receiving packet size %d status %4.4x.\n",
+ pkt_len, rx_status);
+ if (skb != NULL) {
+ skb->dev = dev;
+
+ 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);
+ lp->stats.rx_packets++;
+ lp->stats.rx_bytes += skb->len;
+ } else {
+ DEBUG(1, "%s: couldn't allocate a sk_buff of"
+ " size %d.\n", dev->name, pkt_len);
+ lp->stats.rx_dropped++;
+ }
+ }
+ /* Pop the top of the Rx FIFO */
+ wait_for_completion(dev, RxDiscard);
+ }
+ if (worklimit == 0)
+ printk(KERN_NOTICE "%s: too much work in el3_rx!\n", dev->name);
+ return 0;
+}
+
+/* Set or clear the multicast filter for this adapter.
+ num_addrs == -1 Promiscuous mode, receive all packets
+ num_addrs == 0 Normal mode, clear multicast list
+ num_addrs > 0 Multicast mode, receive normal and MC packets, and do
+ best-effort filtering.
+ */
+static void set_multicast_list(struct net_device *dev)
+{
+ short ioaddr = dev->base_addr;
+ dev_link_t *link;
+ for (link = dev_list; link; link = link->next)
+ if (link->priv == dev) break;
+ if (!(DEV_OK(link))) return;
+#ifdef PCMCIA_DEBUG
+ if (pc_debug > 2) {
+ static int old = 0;
+ if (old != dev->mc_count) {
+ old = dev->mc_count;
+ DEBUG(0, "%s: setting Rx mode to %d addresses.\n",
+ dev->name, old);
+ }
+ }
+#endif
+ if (dev->flags & IFF_PROMISC)
+ outw(SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm,
+ ioaddr + EL3_CMD);
+ else if (dev->mc_count || (dev->flags & IFF_ALLMULTI))
+ outw(SetRxFilter|RxStation|RxMulticast|RxBroadcast, ioaddr + EL3_CMD);
+ else
+ outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD);
+}
+
+static int el3_close(struct net_device *dev)
+{
+ int ioaddr = dev->base_addr;
+ dev_link_t *link;
+
+ for (link = dev_list; link; link = link->next)
+ if (link->priv == dev) break;
+ if (link == NULL)
+ return -ENODEV;
+
+ DEBUG(1, "%s: shutting down ethercard.\n", dev->name);
+
+ if (DEV_OK(link)) {
+ /* Turn off statistics ASAP. We update lp->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(ioaddr, dev);
+ }
+
+ link->open--;
+ dev->start = 0;
+ del_timer(&((struct el3_private *)dev->priv)->media);
+ if (link->state & DEV_STALE_CONFIG) {
+ link->release.expires = jiffies + HZ/20;
+ link->state |= DEV_RELEASE_PENDING;
+ add_timer(&link->release);
+ }
+
+ MOD_DEC_USE_COUNT;
+
+ return 0;
+}
+
+/*====================================================================*/
+
+int init_3c589_cs(void)
+{
+ servinfo_t serv;
+ DEBUG(0, "%s\n", version);
+ CardServices(GetCardServicesInfo, &serv);
+ if (serv.Revision != CS_RELEASE_CODE) {
+ printk(KERN_NOTICE "3c589_cs: Card Services release "
+ "does not match!\n");
+ return -1;
+ }
+ register_pcmcia_driver(&dev_info, &tc589_attach, &tc589_detach);
+ return 0;
+}
+
+#ifdef MODULE
+int init_module(void)
+{
+ return init_3c589_cs();
+}
+
+void cleanup_module(void)
+{
+ DEBUG(0, "3c589_cs: unloading\n");
+ unregister_pcmcia_driver(&dev_info);
+ while (dev_list != NULL)
+ tc589_detach(dev_list);
+}
+#endif
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)