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[mirror_ubuntu-artful-kernel.git] / drivers / net / ethernet / 3com / 3c589_cs.c
1 /* ======================================================================
2 *
3 * A PCMCIA ethernet driver for the 3com 3c589 card.
4 *
5 * Copyright (C) 1999 David A. Hinds -- dahinds@users.sourceforge.net
6 *
7 * 3c589_cs.c 1.162 2001/10/13 00:08:50
8 *
9 * The network driver code is based on Donald Becker's 3c589 code:
10 *
11 * Written 1994 by Donald Becker.
12 * Copyright 1993 United States Government as represented by the
13 * Director, National Security Agency. This software may be used and
14 * distributed according to the terms of the GNU General Public License,
15 * incorporated herein by reference.
16 * Donald Becker may be reached at becker@scyld.com
17 *
18 * Updated for 2.5.x by Alan Cox <alan@lxorguk.ukuu.org.uk>
19 *
20 * ======================================================================
21 */
22
23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
25 #define DRV_NAME "3c589_cs"
26 #define DRV_VERSION "1.162-ac"
27
28 #include <linux/module.h>
29 #include <linux/kernel.h>
30 #include <linux/ptrace.h>
31 #include <linux/slab.h>
32 #include <linux/string.h>
33 #include <linux/timer.h>
34 #include <linux/interrupt.h>
35 #include <linux/in.h>
36 #include <linux/delay.h>
37 #include <linux/ethtool.h>
38 #include <linux/netdevice.h>
39 #include <linux/etherdevice.h>
40 #include <linux/skbuff.h>
41 #include <linux/if_arp.h>
42 #include <linux/ioport.h>
43 #include <linux/bitops.h>
44 #include <linux/jiffies.h>
45 #include <linux/uaccess.h>
46 #include <linux/io.h>
47
48 #include <pcmcia/cistpl.h>
49 #include <pcmcia/cisreg.h>
50 #include <pcmcia/ciscode.h>
51 #include <pcmcia/ds.h>
52
53
54 /* To minimize the size of the driver source I only define operating
55 * constants if they are used several times. You'll need the manual
56 * if you want to understand driver details.
57 */
58
59 /* Offsets from base I/O address. */
60 #define EL3_DATA 0x00
61 #define EL3_TIMER 0x0a
62 #define EL3_CMD 0x0e
63 #define EL3_STATUS 0x0e
64
65 #define EEPROM_READ 0x0080
66 #define EEPROM_BUSY 0x8000
67
68 #define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
69
70 /* The top five bits written to EL3_CMD are a command, the lower
71 * 11 bits are the parameter, if applicable.
72 */
73
74 enum c509cmd {
75 TotalReset = 0<<11,
76 SelectWindow = 1<<11,
77 StartCoax = 2<<11,
78 RxDisable = 3<<11,
79 RxEnable = 4<<11,
80 RxReset = 5<<11,
81 RxDiscard = 8<<11,
82 TxEnable = 9<<11,
83 TxDisable = 10<<11,
84 TxReset = 11<<11,
85 FakeIntr = 12<<11,
86 AckIntr = 13<<11,
87 SetIntrEnb = 14<<11,
88 SetStatusEnb = 15<<11,
89 SetRxFilter = 16<<11,
90 SetRxThreshold = 17<<11,
91 SetTxThreshold = 18<<11,
92 SetTxStart = 19<<11,
93 StatsEnable = 21<<11,
94 StatsDisable = 22<<11,
95 StopCoax = 23<<11
96 };
97
98 enum c509status {
99 IntLatch = 0x0001,
100 AdapterFailure = 0x0002,
101 TxComplete = 0x0004,
102 TxAvailable = 0x0008,
103 RxComplete = 0x0010,
104 RxEarly = 0x0020,
105 IntReq = 0x0040,
106 StatsFull = 0x0080,
107 CmdBusy = 0x1000
108 };
109
110 /* The SetRxFilter command accepts the following classes: */
111 enum RxFilter {
112 RxStation = 1,
113 RxMulticast = 2,
114 RxBroadcast = 4,
115 RxProm = 8
116 };
117
118 /* Register window 1 offsets, the window used in normal operation. */
119 #define TX_FIFO 0x00
120 #define RX_FIFO 0x00
121 #define RX_STATUS 0x08
122 #define TX_STATUS 0x0B
123 #define TX_FREE 0x0C /* Remaining free bytes in Tx buffer. */
124
125 #define WN0_IRQ 0x08 /* Window 0: Set IRQ line in bits 12-15. */
126 #define WN4_MEDIA 0x0A /* Window 4: Various transcvr/media bits. */
127 #define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */
128 #define MEDIA_LED 0x0001 /* Enable link light on 3C589E cards. */
129
130 /* Time in jiffies before concluding Tx hung */
131 #define TX_TIMEOUT ((400*HZ)/1000)
132
133 struct el3_private {
134 struct pcmcia_device *p_dev;
135 /* For transceiver monitoring */
136 struct timer_list media;
137 u16 media_status;
138 u16 fast_poll;
139 unsigned long last_irq;
140 spinlock_t lock;
141 };
142
143 static const char *if_names[] = { "auto", "10baseT", "10base2", "AUI" };
144
145 /*====================================================================*/
146
147 /* Module parameters */
148
149 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
150 MODULE_DESCRIPTION("3Com 3c589 series PCMCIA ethernet driver");
151 MODULE_LICENSE("GPL");
152
153 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
154
155 /* Special hook for setting if_port when module is loaded */
156 INT_MODULE_PARM(if_port, 0);
157
158
159 /*====================================================================*/
160
161 static int tc589_config(struct pcmcia_device *link);
162 static void tc589_release(struct pcmcia_device *link);
163
164 static u16 read_eeprom(unsigned int ioaddr, int index);
165 static void tc589_reset(struct net_device *dev);
166 static void media_check(unsigned long arg);
167 static int el3_config(struct net_device *dev, struct ifmap *map);
168 static int el3_open(struct net_device *dev);
169 static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
170 struct net_device *dev);
171 static irqreturn_t el3_interrupt(int irq, void *dev_id);
172 static void update_stats(struct net_device *dev);
173 static struct net_device_stats *el3_get_stats(struct net_device *dev);
174 static int el3_rx(struct net_device *dev);
175 static int el3_close(struct net_device *dev);
176 static void el3_tx_timeout(struct net_device *dev);
177 static void set_rx_mode(struct net_device *dev);
178 static void set_multicast_list(struct net_device *dev);
179 static const struct ethtool_ops netdev_ethtool_ops;
180
181 static void tc589_detach(struct pcmcia_device *p_dev);
182
183 static const struct net_device_ops el3_netdev_ops = {
184 .ndo_open = el3_open,
185 .ndo_stop = el3_close,
186 .ndo_start_xmit = el3_start_xmit,
187 .ndo_tx_timeout = el3_tx_timeout,
188 .ndo_set_config = el3_config,
189 .ndo_get_stats = el3_get_stats,
190 .ndo_set_rx_mode = set_multicast_list,
191 .ndo_change_mtu = eth_change_mtu,
192 .ndo_set_mac_address = eth_mac_addr,
193 .ndo_validate_addr = eth_validate_addr,
194 };
195
196 static int tc589_probe(struct pcmcia_device *link)
197 {
198 struct el3_private *lp;
199 struct net_device *dev;
200
201 dev_dbg(&link->dev, "3c589_attach()\n");
202
203 /* Create new ethernet device */
204 dev = alloc_etherdev(sizeof(struct el3_private));
205 if (!dev)
206 return -ENOMEM;
207 lp = netdev_priv(dev);
208 link->priv = dev;
209 lp->p_dev = link;
210
211 spin_lock_init(&lp->lock);
212 link->resource[0]->end = 16;
213 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_16;
214
215 link->config_flags |= CONF_ENABLE_IRQ;
216 link->config_index = 1;
217
218 dev->netdev_ops = &el3_netdev_ops;
219 dev->watchdog_timeo = TX_TIMEOUT;
220
221 dev->ethtool_ops = &netdev_ethtool_ops;
222
223 return tc589_config(link);
224 }
225
226 static void tc589_detach(struct pcmcia_device *link)
227 {
228 struct net_device *dev = link->priv;
229
230 dev_dbg(&link->dev, "3c589_detach\n");
231
232 unregister_netdev(dev);
233
234 tc589_release(link);
235
236 free_netdev(dev);
237 } /* tc589_detach */
238
239 static int tc589_config(struct pcmcia_device *link)
240 {
241 struct net_device *dev = link->priv;
242 __be16 *phys_addr;
243 int ret, i, j, multi = 0, fifo;
244 unsigned int ioaddr;
245 static const char * const ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
246 u8 *buf;
247 size_t len;
248
249 dev_dbg(&link->dev, "3c589_config\n");
250
251 phys_addr = (__be16 *)dev->dev_addr;
252 /* Is this a 3c562? */
253 if (link->manf_id != MANFID_3COM)
254 dev_info(&link->dev, "hmmm, is this really a 3Com card??\n");
255 multi = (link->card_id == PRODID_3COM_3C562);
256
257 link->io_lines = 16;
258
259 /* For the 3c562, the base address must be xx00-xx7f */
260 for (i = j = 0; j < 0x400; j += 0x10) {
261 if (multi && (j & 0x80))
262 continue;
263 link->resource[0]->start = j ^ 0x300;
264 i = pcmcia_request_io(link);
265 if (i == 0)
266 break;
267 }
268 if (i != 0)
269 goto failed;
270
271 ret = pcmcia_request_irq(link, el3_interrupt);
272 if (ret)
273 goto failed;
274
275 ret = pcmcia_enable_device(link);
276 if (ret)
277 goto failed;
278
279 dev->irq = link->irq;
280 dev->base_addr = link->resource[0]->start;
281 ioaddr = dev->base_addr;
282 EL3WINDOW(0);
283
284 /* The 3c589 has an extra EEPROM for configuration info, including
285 * the hardware address. The 3c562 puts the address in the CIS.
286 */
287 len = pcmcia_get_tuple(link, 0x88, &buf);
288 if (buf && len >= 6) {
289 for (i = 0; i < 3; i++)
290 phys_addr[i] = htons(le16_to_cpu(buf[i*2]));
291 kfree(buf);
292 } else {
293 kfree(buf); /* 0 < len < 6 */
294 for (i = 0; i < 3; i++)
295 phys_addr[i] = htons(read_eeprom(ioaddr, i));
296 if (phys_addr[0] == htons(0x6060)) {
297 dev_err(&link->dev, "IO port conflict at 0x%03lx-0x%03lx\n",
298 dev->base_addr, dev->base_addr+15);
299 goto failed;
300 }
301 }
302
303 /* The address and resource configuration register aren't loaded from
304 * the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version.
305 */
306
307 outw(0x3f00, ioaddr + 8);
308 fifo = inl(ioaddr);
309
310 /* The if_port symbol can be set when the module is loaded */
311 if ((if_port >= 0) && (if_port <= 3))
312 dev->if_port = if_port;
313 else
314 dev_err(&link->dev, "invalid if_port requested\n");
315
316 SET_NETDEV_DEV(dev, &link->dev);
317
318 if (register_netdev(dev) != 0) {
319 dev_err(&link->dev, "register_netdev() failed\n");
320 goto failed;
321 }
322
323 netdev_info(dev, "3Com 3c%s, io %#3lx, irq %d, hw_addr %pM\n",
324 (multi ? "562" : "589"), dev->base_addr, dev->irq,
325 dev->dev_addr);
326 netdev_info(dev, " %dK FIFO split %s Rx:Tx, %s xcvr\n",
327 (fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3],
328 if_names[dev->if_port]);
329 return 0;
330
331 failed:
332 tc589_release(link);
333 return -ENODEV;
334 } /* tc589_config */
335
336 static void tc589_release(struct pcmcia_device *link)
337 {
338 pcmcia_disable_device(link);
339 }
340
341 static int tc589_suspend(struct pcmcia_device *link)
342 {
343 struct net_device *dev = link->priv;
344
345 if (link->open)
346 netif_device_detach(dev);
347
348 return 0;
349 }
350
351 static int tc589_resume(struct pcmcia_device *link)
352 {
353 struct net_device *dev = link->priv;
354
355 if (link->open) {
356 tc589_reset(dev);
357 netif_device_attach(dev);
358 }
359
360 return 0;
361 }
362
363 /*====================================================================*/
364
365 /* Use this for commands that may take time to finish */
366
367 static void tc589_wait_for_completion(struct net_device *dev, int cmd)
368 {
369 int i = 100;
370 outw(cmd, dev->base_addr + EL3_CMD);
371 while (--i > 0)
372 if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000))
373 break;
374 if (i == 0)
375 netdev_warn(dev, "command 0x%04x did not complete!\n", cmd);
376 }
377
378 /* Read a word from the EEPROM using the regular EEPROM access register.
379 * Assume that we are in register window zero.
380 */
381
382 static u16 read_eeprom(unsigned int ioaddr, int index)
383 {
384 int i;
385 outw(EEPROM_READ + index, ioaddr + 10);
386 /* Reading the eeprom takes 162 us */
387 for (i = 1620; i >= 0; i--)
388 if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
389 break;
390 return inw(ioaddr + 12);
391 }
392
393 /* Set transceiver type, perhaps to something other than what the user
394 * specified in dev->if_port.
395 */
396
397 static void tc589_set_xcvr(struct net_device *dev, int if_port)
398 {
399 struct el3_private *lp = netdev_priv(dev);
400 unsigned int ioaddr = dev->base_addr;
401
402 EL3WINDOW(0);
403 switch (if_port) {
404 case 0:
405 case 1:
406 outw(0, ioaddr + 6);
407 break;
408 case 2:
409 outw(3<<14, ioaddr + 6);
410 break;
411 case 3:
412 outw(1<<14, ioaddr + 6);
413 break;
414 }
415 /* On PCMCIA, this just turns on the LED */
416 outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD);
417 /* 10baseT interface, enable link beat and jabber check. */
418 EL3WINDOW(4);
419 outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA);
420 EL3WINDOW(1);
421 if (if_port == 2)
422 lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000);
423 else
424 lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800);
425 }
426
427 static void dump_status(struct net_device *dev)
428 {
429 unsigned int ioaddr = dev->base_addr;
430 EL3WINDOW(1);
431 netdev_info(dev, " irq status %04x, rx status %04x, tx status %02x tx free %04x\n",
432 inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS),
433 inb(ioaddr+TX_STATUS), inw(ioaddr+TX_FREE));
434 EL3WINDOW(4);
435 netdev_info(dev, " diagnostics: fifo %04x net %04x ethernet %04x media %04x\n",
436 inw(ioaddr+0x04), inw(ioaddr+0x06), inw(ioaddr+0x08),
437 inw(ioaddr+0x0a));
438 EL3WINDOW(1);
439 }
440
441 /* Reset and restore all of the 3c589 registers. */
442 static void tc589_reset(struct net_device *dev)
443 {
444 unsigned int ioaddr = dev->base_addr;
445 int i;
446
447 EL3WINDOW(0);
448 outw(0x0001, ioaddr + 4); /* Activate board. */
449 outw(0x3f00, ioaddr + 8); /* Set the IRQ line. */
450
451 /* Set the station address in window 2. */
452 EL3WINDOW(2);
453 for (i = 0; i < 6; i++)
454 outb(dev->dev_addr[i], ioaddr + i);
455
456 tc589_set_xcvr(dev, dev->if_port);
457
458 /* Switch to the stats window, and clear all stats by reading. */
459 outw(StatsDisable, ioaddr + EL3_CMD);
460 EL3WINDOW(6);
461 for (i = 0; i < 9; i++)
462 inb(ioaddr+i);
463 inw(ioaddr + 10);
464 inw(ioaddr + 12);
465
466 /* Switch to register set 1 for normal use. */
467 EL3WINDOW(1);
468
469 set_rx_mode(dev);
470 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
471 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
472 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
473 /* Allow status bits to be seen. */
474 outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
475 /* Ack all pending events, and set active indicator mask. */
476 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
477 ioaddr + EL3_CMD);
478 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
479 | AdapterFailure, ioaddr + EL3_CMD);
480 }
481
482 static void netdev_get_drvinfo(struct net_device *dev,
483 struct ethtool_drvinfo *info)
484 {
485 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
486 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
487 snprintf(info->bus_info, sizeof(info->bus_info),
488 "PCMCIA 0x%lx", dev->base_addr);
489 }
490
491 static const struct ethtool_ops netdev_ethtool_ops = {
492 .get_drvinfo = netdev_get_drvinfo,
493 };
494
495 static int el3_config(struct net_device *dev, struct ifmap *map)
496 {
497 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
498 if (map->port <= 3) {
499 dev->if_port = map->port;
500 netdev_info(dev, "switched to %s port\n", if_names[dev->if_port]);
501 tc589_set_xcvr(dev, dev->if_port);
502 } else {
503 return -EINVAL;
504 }
505 }
506 return 0;
507 }
508
509 static int el3_open(struct net_device *dev)
510 {
511 struct el3_private *lp = netdev_priv(dev);
512 struct pcmcia_device *link = lp->p_dev;
513
514 if (!pcmcia_dev_present(link))
515 return -ENODEV;
516
517 link->open++;
518 netif_start_queue(dev);
519
520 tc589_reset(dev);
521 init_timer(&lp->media);
522 lp->media.function = media_check;
523 lp->media.data = (unsigned long) dev;
524 lp->media.expires = jiffies + HZ;
525 add_timer(&lp->media);
526
527 dev_dbg(&link->dev, "%s: opened, status %4.4x.\n",
528 dev->name, inw(dev->base_addr + EL3_STATUS));
529
530 return 0;
531 }
532
533 static void el3_tx_timeout(struct net_device *dev)
534 {
535 unsigned int ioaddr = dev->base_addr;
536
537 netdev_warn(dev, "Transmit timed out!\n");
538 dump_status(dev);
539 dev->stats.tx_errors++;
540 dev->trans_start = jiffies; /* prevent tx timeout */
541 /* Issue TX_RESET and TX_START commands. */
542 tc589_wait_for_completion(dev, TxReset);
543 outw(TxEnable, ioaddr + EL3_CMD);
544 netif_wake_queue(dev);
545 }
546
547 static void pop_tx_status(struct net_device *dev)
548 {
549 unsigned int ioaddr = dev->base_addr;
550 int i;
551
552 /* Clear the Tx status stack. */
553 for (i = 32; i > 0; i--) {
554 u_char tx_status = inb(ioaddr + TX_STATUS);
555 if (!(tx_status & 0x84))
556 break;
557 /* reset transmitter on jabber error or underrun */
558 if (tx_status & 0x30)
559 tc589_wait_for_completion(dev, TxReset);
560 if (tx_status & 0x38) {
561 netdev_dbg(dev, "transmit error: status 0x%02x\n", tx_status);
562 outw(TxEnable, ioaddr + EL3_CMD);
563 dev->stats.tx_aborted_errors++;
564 }
565 outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
566 }
567 }
568
569 static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
570 struct net_device *dev)
571 {
572 unsigned int ioaddr = dev->base_addr;
573 struct el3_private *priv = netdev_priv(dev);
574 unsigned long flags;
575
576 netdev_dbg(dev, "el3_start_xmit(length = %ld) called, status %4.4x.\n",
577 (long)skb->len, inw(ioaddr + EL3_STATUS));
578
579 spin_lock_irqsave(&priv->lock, flags);
580
581 dev->stats.tx_bytes += skb->len;
582
583 /* Put out the doubleword header... */
584 outw(skb->len, ioaddr + TX_FIFO);
585 outw(0x00, ioaddr + TX_FIFO);
586 /* ... and the packet rounded to a doubleword. */
587 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
588
589 if (inw(ioaddr + TX_FREE) <= 1536) {
590 netif_stop_queue(dev);
591 /* Interrupt us when the FIFO has room for max-sized packet. */
592 outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
593 }
594
595 pop_tx_status(dev);
596 spin_unlock_irqrestore(&priv->lock, flags);
597 dev_kfree_skb(skb);
598
599 return NETDEV_TX_OK;
600 }
601
602 /* The EL3 interrupt handler. */
603 static irqreturn_t el3_interrupt(int irq, void *dev_id)
604 {
605 struct net_device *dev = (struct net_device *) dev_id;
606 struct el3_private *lp = netdev_priv(dev);
607 unsigned int ioaddr;
608 __u16 status;
609 int i = 0, handled = 1;
610
611 if (!netif_device_present(dev))
612 return IRQ_NONE;
613
614 ioaddr = dev->base_addr;
615
616 netdev_dbg(dev, "interrupt, status %4.4x.\n", inw(ioaddr + EL3_STATUS));
617
618 spin_lock(&lp->lock);
619 while ((status = inw(ioaddr + EL3_STATUS)) &
620 (IntLatch | RxComplete | StatsFull)) {
621 if ((status & 0xe000) != 0x2000) {
622 netdev_dbg(dev, "interrupt from dead card\n");
623 handled = 0;
624 break;
625 }
626 if (status & RxComplete)
627 el3_rx(dev);
628 if (status & TxAvailable) {
629 netdev_dbg(dev, " TX room bit was handled.\n");
630 /* There's room in the FIFO for a full-sized packet. */
631 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
632 netif_wake_queue(dev);
633 }
634 if (status & TxComplete)
635 pop_tx_status(dev);
636 if (status & (AdapterFailure | RxEarly | StatsFull)) {
637 /* Handle all uncommon interrupts. */
638 if (status & StatsFull) /* Empty statistics. */
639 update_stats(dev);
640 if (status & RxEarly) {
641 /* Rx early is unused. */
642 el3_rx(dev);
643 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
644 }
645 if (status & AdapterFailure) {
646 u16 fifo_diag;
647 EL3WINDOW(4);
648 fifo_diag = inw(ioaddr + 4);
649 EL3WINDOW(1);
650 netdev_warn(dev, "adapter failure, FIFO diagnostic register %04x.\n",
651 fifo_diag);
652 if (fifo_diag & 0x0400) {
653 /* Tx overrun */
654 tc589_wait_for_completion(dev, TxReset);
655 outw(TxEnable, ioaddr + EL3_CMD);
656 }
657 if (fifo_diag & 0x2000) {
658 /* Rx underrun */
659 tc589_wait_for_completion(dev, RxReset);
660 set_rx_mode(dev);
661 outw(RxEnable, ioaddr + EL3_CMD);
662 }
663 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
664 }
665 }
666 if (++i > 10) {
667 netdev_err(dev, "infinite loop in interrupt, status %4.4x.\n",
668 status);
669 /* Clear all interrupts */
670 outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
671 break;
672 }
673 /* Acknowledge the IRQ. */
674 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
675 }
676 lp->last_irq = jiffies;
677 spin_unlock(&lp->lock);
678 netdev_dbg(dev, "exiting interrupt, status %4.4x.\n",
679 inw(ioaddr + EL3_STATUS));
680 return IRQ_RETVAL(handled);
681 }
682
683 static void media_check(unsigned long arg)
684 {
685 struct net_device *dev = (struct net_device *)(arg);
686 struct el3_private *lp = netdev_priv(dev);
687 unsigned int ioaddr = dev->base_addr;
688 u16 media, errs;
689 unsigned long flags;
690
691 if (!netif_device_present(dev))
692 goto reschedule;
693
694 /* Check for pending interrupt with expired latency timer: with
695 * this, we can limp along even if the interrupt is blocked
696 */
697 if ((inw(ioaddr + EL3_STATUS) & IntLatch) &&
698 (inb(ioaddr + EL3_TIMER) == 0xff)) {
699 if (!lp->fast_poll)
700 netdev_warn(dev, "interrupt(s) dropped!\n");
701
702 local_irq_save(flags);
703 el3_interrupt(dev->irq, dev);
704 local_irq_restore(flags);
705
706 lp->fast_poll = HZ;
707 }
708 if (lp->fast_poll) {
709 lp->fast_poll--;
710 lp->media.expires = jiffies + HZ/100;
711 add_timer(&lp->media);
712 return;
713 }
714
715 /* lp->lock guards the EL3 window. Window should always be 1 except
716 * when the lock is held
717 */
718
719 spin_lock_irqsave(&lp->lock, flags);
720 EL3WINDOW(4);
721 media = inw(ioaddr+WN4_MEDIA) & 0xc810;
722
723 /* Ignore collisions unless we've had no irq's recently */
724 if (time_before(jiffies, lp->last_irq + HZ)) {
725 media &= ~0x0010;
726 } else {
727 /* Try harder to detect carrier errors */
728 EL3WINDOW(6);
729 outw(StatsDisable, ioaddr + EL3_CMD);
730 errs = inb(ioaddr + 0);
731 outw(StatsEnable, ioaddr + EL3_CMD);
732 dev->stats.tx_carrier_errors += errs;
733 if (errs || (lp->media_status & 0x0010))
734 media |= 0x0010;
735 }
736
737 if (media != lp->media_status) {
738 if ((media & lp->media_status & 0x8000) &&
739 ((lp->media_status ^ media) & 0x0800))
740 netdev_info(dev, "%s link beat\n",
741 (lp->media_status & 0x0800 ? "lost" : "found"));
742 else if ((media & lp->media_status & 0x4000) &&
743 ((lp->media_status ^ media) & 0x0010))
744 netdev_info(dev, "coax cable %s\n",
745 (lp->media_status & 0x0010 ? "ok" : "problem"));
746 if (dev->if_port == 0) {
747 if (media & 0x8000) {
748 if (media & 0x0800)
749 netdev_info(dev, "flipped to 10baseT\n");
750 else
751 tc589_set_xcvr(dev, 2);
752 } else if (media & 0x4000) {
753 if (media & 0x0010)
754 tc589_set_xcvr(dev, 1);
755 else
756 netdev_info(dev, "flipped to 10base2\n");
757 }
758 }
759 lp->media_status = media;
760 }
761
762 EL3WINDOW(1);
763 spin_unlock_irqrestore(&lp->lock, flags);
764
765 reschedule:
766 lp->media.expires = jiffies + HZ;
767 add_timer(&lp->media);
768 }
769
770 static struct net_device_stats *el3_get_stats(struct net_device *dev)
771 {
772 struct el3_private *lp = netdev_priv(dev);
773 unsigned long flags;
774 struct pcmcia_device *link = lp->p_dev;
775
776 if (pcmcia_dev_present(link)) {
777 spin_lock_irqsave(&lp->lock, flags);
778 update_stats(dev);
779 spin_unlock_irqrestore(&lp->lock, flags);
780 }
781 return &dev->stats;
782 }
783
784 /* Update statistics. We change to register window 6, so this should be run
785 * single-threaded if the device is active. This is expected to be a rare
786 * operation, and it's simpler for the rest of the driver to assume that
787 * window 1 is always valid rather than use a special window-state variable.
788 *
789 * Caller must hold the lock for this
790 */
791
792 static void update_stats(struct net_device *dev)
793 {
794 unsigned int ioaddr = dev->base_addr;
795
796 netdev_dbg(dev, "updating the statistics.\n");
797 /* Turn off statistics updates while reading. */
798 outw(StatsDisable, ioaddr + EL3_CMD);
799 /* Switch to the stats window, and read everything. */
800 EL3WINDOW(6);
801 dev->stats.tx_carrier_errors += inb(ioaddr + 0);
802 dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
803 /* Multiple collisions. */
804 inb(ioaddr + 2);
805 dev->stats.collisions += inb(ioaddr + 3);
806 dev->stats.tx_window_errors += inb(ioaddr + 4);
807 dev->stats.rx_fifo_errors += inb(ioaddr + 5);
808 dev->stats.tx_packets += inb(ioaddr + 6);
809 /* Rx packets */
810 inb(ioaddr + 7);
811 /* Tx deferrals */
812 inb(ioaddr + 8);
813 /* Rx octets */
814 inw(ioaddr + 10);
815 /* Tx octets */
816 inw(ioaddr + 12);
817
818 /* Back to window 1, and turn statistics back on. */
819 EL3WINDOW(1);
820 outw(StatsEnable, ioaddr + EL3_CMD);
821 }
822
823 static int el3_rx(struct net_device *dev)
824 {
825 unsigned int ioaddr = dev->base_addr;
826 int worklimit = 32;
827 short rx_status;
828
829 netdev_dbg(dev, "in rx_packet(), status %4.4x, rx_status %4.4x.\n",
830 inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
831 while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
832 worklimit > 0) {
833 worklimit--;
834 if (rx_status & 0x4000) { /* Error, update stats. */
835 short error = rx_status & 0x3800;
836 dev->stats.rx_errors++;
837 switch (error) {
838 case 0x0000:
839 dev->stats.rx_over_errors++;
840 break;
841 case 0x0800:
842 dev->stats.rx_length_errors++;
843 break;
844 case 0x1000:
845 dev->stats.rx_frame_errors++;
846 break;
847 case 0x1800:
848 dev->stats.rx_length_errors++;
849 break;
850 case 0x2000:
851 dev->stats.rx_frame_errors++;
852 break;
853 case 0x2800:
854 dev->stats.rx_crc_errors++;
855 break;
856 }
857 } else {
858 short pkt_len = rx_status & 0x7ff;
859 struct sk_buff *skb;
860
861 skb = netdev_alloc_skb(dev, pkt_len + 5);
862
863 netdev_dbg(dev, " Receiving packet size %d status %4.4x.\n",
864 pkt_len, rx_status);
865 if (skb != NULL) {
866 skb_reserve(skb, 2);
867 insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
868 (pkt_len+3)>>2);
869 skb->protocol = eth_type_trans(skb, dev);
870 netif_rx(skb);
871 dev->stats.rx_packets++;
872 dev->stats.rx_bytes += pkt_len;
873 } else {
874 netdev_dbg(dev, "couldn't allocate a sk_buff of size %d.\n",
875 pkt_len);
876 dev->stats.rx_dropped++;
877 }
878 }
879 /* Pop the top of the Rx FIFO */
880 tc589_wait_for_completion(dev, RxDiscard);
881 }
882 if (worklimit == 0)
883 netdev_warn(dev, "too much work in el3_rx!\n");
884 return 0;
885 }
886
887 static void set_rx_mode(struct net_device *dev)
888 {
889 unsigned int ioaddr = dev->base_addr;
890 u16 opts = SetRxFilter | RxStation | RxBroadcast;
891
892 if (dev->flags & IFF_PROMISC)
893 opts |= RxMulticast | RxProm;
894 else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI))
895 opts |= RxMulticast;
896 outw(opts, ioaddr + EL3_CMD);
897 }
898
899 static void set_multicast_list(struct net_device *dev)
900 {
901 struct el3_private *priv = netdev_priv(dev);
902 unsigned long flags;
903
904 spin_lock_irqsave(&priv->lock, flags);
905 set_rx_mode(dev);
906 spin_unlock_irqrestore(&priv->lock, flags);
907 }
908
909 static int el3_close(struct net_device *dev)
910 {
911 struct el3_private *lp = netdev_priv(dev);
912 struct pcmcia_device *link = lp->p_dev;
913 unsigned int ioaddr = dev->base_addr;
914
915 dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name);
916
917 if (pcmcia_dev_present(link)) {
918 /* Turn off statistics ASAP. We update dev->stats below. */
919 outw(StatsDisable, ioaddr + EL3_CMD);
920
921 /* Disable the receiver and transmitter. */
922 outw(RxDisable, ioaddr + EL3_CMD);
923 outw(TxDisable, ioaddr + EL3_CMD);
924
925 if (dev->if_port == 2)
926 /* Turn off thinnet power. Green! */
927 outw(StopCoax, ioaddr + EL3_CMD);
928 else if (dev->if_port == 1) {
929 /* Disable link beat and jabber */
930 EL3WINDOW(4);
931 outw(0, ioaddr + WN4_MEDIA);
932 }
933
934 /* Switching back to window 0 disables the IRQ. */
935 EL3WINDOW(0);
936 /* But we explicitly zero the IRQ line select anyway. */
937 outw(0x0f00, ioaddr + WN0_IRQ);
938
939 /* Check if the card still exists */
940 if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000)
941 update_stats(dev);
942 }
943
944 link->open--;
945 netif_stop_queue(dev);
946 del_timer_sync(&lp->media);
947
948 return 0;
949 }
950
951 static const struct pcmcia_device_id tc589_ids[] = {
952 PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562),
953 PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77),
954 PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589),
955 PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202),
956 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "cis/3CXEM556.cis"),
957 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "cis/3CXEM556.cis"),
958 PCMCIA_DEVICE_NULL,
959 };
960 MODULE_DEVICE_TABLE(pcmcia, tc589_ids);
961
962 static struct pcmcia_driver tc589_driver = {
963 .owner = THIS_MODULE,
964 .name = "3c589_cs",
965 .probe = tc589_probe,
966 .remove = tc589_detach,
967 .id_table = tc589_ids,
968 .suspend = tc589_suspend,
969 .resume = tc589_resume,
970 };
971 module_pcmcia_driver(tc589_driver);
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