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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / net / ethernet / 3com / 3c589_cs.c
blob2b2695311bda9b6b518bf1cfea8db42b73604be0
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(struct timer_list *t);
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_set_mac_address = eth_mac_addr,
192 .ndo_validate_addr = eth_validate_addr,
193 };
194
195 static int tc589_probe(struct pcmcia_device *link)
196 {
197 struct el3_private *lp;
198 struct net_device *dev;
199
200 dev_dbg(&link->dev, "3c589_attach()\n");
201
202 /* Create new ethernet device */
203 dev = alloc_etherdev(sizeof(struct el3_private));
204 if (!dev)
205 return -ENOMEM;
206 lp = netdev_priv(dev);
207 link->priv = dev;
208 lp->p_dev = link;
209
210 spin_lock_init(&lp->lock);
211 link->resource[0]->end = 16;
212 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_16;
213
214 link->config_flags |= CONF_ENABLE_IRQ;
215 link->config_index = 1;
216
217 dev->netdev_ops = &el3_netdev_ops;
218 dev->watchdog_timeo = TX_TIMEOUT;
219
220 dev->ethtool_ops = &netdev_ethtool_ops;
221
222 return tc589_config(link);
223 }
224
225 static void tc589_detach(struct pcmcia_device *link)
226 {
227 struct net_device *dev = link->priv;
228
229 dev_dbg(&link->dev, "3c589_detach\n");
230
231 unregister_netdev(dev);
232
233 tc589_release(link);
234
235 free_netdev(dev);
236 } /* tc589_detach */
237
238 static int tc589_config(struct pcmcia_device *link)
239 {
240 struct net_device *dev = link->priv;
241 __be16 *phys_addr;
242 int ret, i, j, multi = 0, fifo;
243 unsigned int ioaddr;
244 static const char * const ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
245 u8 *buf;
246 size_t len;
247
248 dev_dbg(&link->dev, "3c589_config\n");
249
250 phys_addr = (__be16 *)dev->dev_addr;
251 /* Is this a 3c562? */
252 if (link->manf_id != MANFID_3COM)
253 dev_info(&link->dev, "hmmm, is this really a 3Com card??\n");
254 multi = (link->card_id == PRODID_3COM_3C562);
255
256 link->io_lines = 16;
257
258 /* For the 3c562, the base address must be xx00-xx7f */
259 for (i = j = 0; j < 0x400; j += 0x10) {
260 if (multi && (j & 0x80))
261 continue;
262 link->resource[0]->start = j ^ 0x300;
263 i = pcmcia_request_io(link);
264 if (i == 0)
265 break;
266 }
267 if (i != 0)
268 goto failed;
269
270 ret = pcmcia_request_irq(link, el3_interrupt);
271 if (ret)
272 goto failed;
273
274 ret = pcmcia_enable_device(link);
275 if (ret)
276 goto failed;
277
278 dev->irq = link->irq;
279 dev->base_addr = link->resource[0]->start;
280 ioaddr = dev->base_addr;
281 EL3WINDOW(0);
282
283 /* The 3c589 has an extra EEPROM for configuration info, including
284 * the hardware address. The 3c562 puts the address in the CIS.
285 */
286 len = pcmcia_get_tuple(link, 0x88, &buf);
287 if (buf && len >= 6) {
288 for (i = 0; i < 3; i++)
289 phys_addr[i] = htons(le16_to_cpu(buf[i*2]));
290 kfree(buf);
291 } else {
292 kfree(buf); /* 0 < len < 6 */
293 for (i = 0; i < 3; i++)
294 phys_addr[i] = htons(read_eeprom(ioaddr, i));
295 if (phys_addr[0] == htons(0x6060)) {
296 dev_err(&link->dev, "IO port conflict at 0x%03lx-0x%03lx\n",
297 dev->base_addr, dev->base_addr+15);
298 goto failed;
299 }
300 }
301
302 /* The address and resource configuration register aren't loaded from
303 * the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version.
304 */
305
306 outw(0x3f00, ioaddr + 8);
307 fifo = inl(ioaddr);
308
309 /* The if_port symbol can be set when the module is loaded */
310 if ((if_port >= 0) && (if_port <= 3))
311 dev->if_port = if_port;
312 else
313 dev_err(&link->dev, "invalid if_port requested\n");
314
315 SET_NETDEV_DEV(dev, &link->dev);
316
317 if (register_netdev(dev) != 0) {
318 dev_err(&link->dev, "register_netdev() failed\n");
319 goto failed;
320 }
321
322 netdev_info(dev, "3Com 3c%s, io %#3lx, irq %d, hw_addr %pM\n",
323 (multi ? "562" : "589"), dev->base_addr, dev->irq,
324 dev->dev_addr);
325 netdev_info(dev, " %dK FIFO split %s Rx:Tx, %s xcvr\n",
326 (fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3],
327 if_names[dev->if_port]);
328 return 0;
329
330 failed:
331 tc589_release(link);
332 return -ENODEV;
333 } /* tc589_config */
334
335 static void tc589_release(struct pcmcia_device *link)
336 {
337 pcmcia_disable_device(link);
338 }
339
340 static int tc589_suspend(struct pcmcia_device *link)
341 {
342 struct net_device *dev = link->priv;
343
344 if (link->open)
345 netif_device_detach(dev);
346
347 return 0;
348 }
349
350 static int tc589_resume(struct pcmcia_device *link)
351 {
352 struct net_device *dev = link->priv;
353
354 if (link->open) {
355 tc589_reset(dev);
356 netif_device_attach(dev);
357 }
358
359 return 0;
360 }
361
362 /*====================================================================*/
363
364 /* Use this for commands that may take time to finish */
365
366 static void tc589_wait_for_completion(struct net_device *dev, int cmd)
367 {
368 int i = 100;
369 outw(cmd, dev->base_addr + EL3_CMD);
370 while (--i > 0)
371 if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000))
372 break;
373 if (i == 0)
374 netdev_warn(dev, "command 0x%04x did not complete!\n", cmd);
375 }
376
377 /* Read a word from the EEPROM using the regular EEPROM access register.
378 * Assume that we are in register window zero.
379 */
380
381 static u16 read_eeprom(unsigned int ioaddr, int index)
382 {
383 int i;
384 outw(EEPROM_READ + index, ioaddr + 10);
385 /* Reading the eeprom takes 162 us */
386 for (i = 1620; i >= 0; i--)
387 if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
388 break;
389 return inw(ioaddr + 12);
390 }
391
392 /* Set transceiver type, perhaps to something other than what the user
393 * specified in dev->if_port.
394 */
395
396 static void tc589_set_xcvr(struct net_device *dev, int if_port)
397 {
398 struct el3_private *lp = netdev_priv(dev);
399 unsigned int ioaddr = dev->base_addr;
400
401 EL3WINDOW(0);
402 switch (if_port) {
403 case 0:
404 case 1:
405 outw(0, ioaddr + 6);
406 break;
407 case 2:
408 outw(3<<14, ioaddr + 6);
409 break;
410 case 3:
411 outw(1<<14, ioaddr + 6);
412 break;
413 }
414 /* On PCMCIA, this just turns on the LED */
415 outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD);
416 /* 10baseT interface, enable link beat and jabber check. */
417 EL3WINDOW(4);
418 outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA);
419 EL3WINDOW(1);
420 if (if_port == 2)
421 lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000);
422 else
423 lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800);
424 }
425
426 static void dump_status(struct net_device *dev)
427 {
428 unsigned int ioaddr = dev->base_addr;
429 EL3WINDOW(1);
430 netdev_info(dev, " irq status %04x, rx status %04x, tx status %02x tx free %04x\n",
431 inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS),
432 inb(ioaddr+TX_STATUS), inw(ioaddr+TX_FREE));
433 EL3WINDOW(4);
434 netdev_info(dev, " diagnostics: fifo %04x net %04x ethernet %04x media %04x\n",
435 inw(ioaddr+0x04), inw(ioaddr+0x06), inw(ioaddr+0x08),
436 inw(ioaddr+0x0a));
437 EL3WINDOW(1);
438 }
439
440 /* Reset and restore all of the 3c589 registers. */
441 static void tc589_reset(struct net_device *dev)
442 {
443 unsigned int ioaddr = dev->base_addr;
444 int i;
445
446 EL3WINDOW(0);
447 outw(0x0001, ioaddr + 4); /* Activate board. */
448 outw(0x3f00, ioaddr + 8); /* Set the IRQ line. */
449
450 /* Set the station address in window 2. */
451 EL3WINDOW(2);
452 for (i = 0; i < 6; i++)
453 outb(dev->dev_addr[i], ioaddr + i);
454
455 tc589_set_xcvr(dev, dev->if_port);
456
457 /* Switch to the stats window, and clear all stats by reading. */
458 outw(StatsDisable, ioaddr + EL3_CMD);
459 EL3WINDOW(6);
460 for (i = 0; i < 9; i++)
461 inb(ioaddr+i);
462 inw(ioaddr + 10);
463 inw(ioaddr + 12);
464
465 /* Switch to register set 1 for normal use. */
466 EL3WINDOW(1);
467
468 set_rx_mode(dev);
469 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
470 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
471 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
472 /* Allow status bits to be seen. */
473 outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
474 /* Ack all pending events, and set active indicator mask. */
475 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
476 ioaddr + EL3_CMD);
477 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
478 | AdapterFailure, ioaddr + EL3_CMD);
479 }
480
481 static void netdev_get_drvinfo(struct net_device *dev,
482 struct ethtool_drvinfo *info)
483 {
484 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
485 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
486 snprintf(info->bus_info, sizeof(info->bus_info),
487 "PCMCIA 0x%lx", dev->base_addr);
488 }
489
490 static const struct ethtool_ops netdev_ethtool_ops = {
491 .get_drvinfo = netdev_get_drvinfo,
492 };
493
494 static int el3_config(struct net_device *dev, struct ifmap *map)
495 {
496 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
497 if (map->port <= 3) {
498 dev->if_port = map->port;
499 netdev_info(dev, "switched to %s port\n", if_names[dev->if_port]);
500 tc589_set_xcvr(dev, dev->if_port);
501 } else {
502 return -EINVAL;
503 }
504 }
505 return 0;
506 }
507
508 static int el3_open(struct net_device *dev)
509 {
510 struct el3_private *lp = netdev_priv(dev);
511 struct pcmcia_device *link = lp->p_dev;
512
513 if (!pcmcia_dev_present(link))
514 return -ENODEV;
515
516 link->open++;
517 netif_start_queue(dev);
518
519 tc589_reset(dev);
520 timer_setup(&lp->media, media_check, 0);
521 mod_timer(&lp->media, jiffies + HZ);
522
523 dev_dbg(&link->dev, "%s: opened, status %4.4x.\n",
524 dev->name, inw(dev->base_addr + EL3_STATUS));
525
526 return 0;
527 }
528
529 static void el3_tx_timeout(struct net_device *dev)
530 {
531 unsigned int ioaddr = dev->base_addr;
532
533 netdev_warn(dev, "Transmit timed out!\n");
534 dump_status(dev);
535 dev->stats.tx_errors++;
536 netif_trans_update(dev); /* prevent tx timeout */
537 /* Issue TX_RESET and TX_START commands. */
538 tc589_wait_for_completion(dev, TxReset);
539 outw(TxEnable, ioaddr + EL3_CMD);
540 netif_wake_queue(dev);
541 }
542
543 static void pop_tx_status(struct net_device *dev)
544 {
545 unsigned int ioaddr = dev->base_addr;
546 int i;
547
548 /* Clear the Tx status stack. */
549 for (i = 32; i > 0; i--) {
550 u_char tx_status = inb(ioaddr + TX_STATUS);
551 if (!(tx_status & 0x84))
552 break;
553 /* reset transmitter on jabber error or underrun */
554 if (tx_status & 0x30)
555 tc589_wait_for_completion(dev, TxReset);
556 if (tx_status & 0x38) {
557 netdev_dbg(dev, "transmit error: status 0x%02x\n", tx_status);
558 outw(TxEnable, ioaddr + EL3_CMD);
559 dev->stats.tx_aborted_errors++;
560 }
561 outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
562 }
563 }
564
565 static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
566 struct net_device *dev)
567 {
568 unsigned int ioaddr = dev->base_addr;
569 struct el3_private *priv = netdev_priv(dev);
570 unsigned long flags;
571
572 netdev_dbg(dev, "el3_start_xmit(length = %ld) called, status %4.4x.\n",
573 (long)skb->len, inw(ioaddr + EL3_STATUS));
574
575 spin_lock_irqsave(&priv->lock, flags);
576
577 dev->stats.tx_bytes += skb->len;
578
579 /* Put out the doubleword header... */
580 outw(skb->len, ioaddr + TX_FIFO);
581 outw(0x00, ioaddr + TX_FIFO);
582 /* ... and the packet rounded to a doubleword. */
583 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
584
585 if (inw(ioaddr + TX_FREE) <= 1536) {
586 netif_stop_queue(dev);
587 /* Interrupt us when the FIFO has room for max-sized packet. */
588 outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
589 }
590
591 pop_tx_status(dev);
592 spin_unlock_irqrestore(&priv->lock, flags);
593 dev_kfree_skb(skb);
594
595 return NETDEV_TX_OK;
596 }
597
598 /* The EL3 interrupt handler. */
599 static irqreturn_t el3_interrupt(int irq, void *dev_id)
600 {
601 struct net_device *dev = (struct net_device *) dev_id;
602 struct el3_private *lp = netdev_priv(dev);
603 unsigned int ioaddr;
604 __u16 status;
605 int i = 0, handled = 1;
606
607 if (!netif_device_present(dev))
608 return IRQ_NONE;
609
610 ioaddr = dev->base_addr;
611
612 netdev_dbg(dev, "interrupt, status %4.4x.\n", inw(ioaddr + EL3_STATUS));
613
614 spin_lock(&lp->lock);
615 while ((status = inw(ioaddr + EL3_STATUS)) &
616 (IntLatch | RxComplete | StatsFull)) {
617 if ((status & 0xe000) != 0x2000) {
618 netdev_dbg(dev, "interrupt from dead card\n");
619 handled = 0;
620 break;
621 }
622 if (status & RxComplete)
623 el3_rx(dev);
624 if (status & TxAvailable) {
625 netdev_dbg(dev, " TX room bit was handled.\n");
626 /* There's room in the FIFO for a full-sized packet. */
627 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
628 netif_wake_queue(dev);
629 }
630 if (status & TxComplete)
631 pop_tx_status(dev);
632 if (status & (AdapterFailure | RxEarly | StatsFull)) {
633 /* Handle all uncommon interrupts. */
634 if (status & StatsFull) /* Empty statistics. */
635 update_stats(dev);
636 if (status & RxEarly) {
637 /* Rx early is unused. */
638 el3_rx(dev);
639 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
640 }
641 if (status & AdapterFailure) {
642 u16 fifo_diag;
643 EL3WINDOW(4);
644 fifo_diag = inw(ioaddr + 4);
645 EL3WINDOW(1);
646 netdev_warn(dev, "adapter failure, FIFO diagnostic register %04x.\n",
647 fifo_diag);
648 if (fifo_diag & 0x0400) {
649 /* Tx overrun */
650 tc589_wait_for_completion(dev, TxReset);
651 outw(TxEnable, ioaddr + EL3_CMD);
652 }
653 if (fifo_diag & 0x2000) {
654 /* Rx underrun */
655 tc589_wait_for_completion(dev, RxReset);
656 set_rx_mode(dev);
657 outw(RxEnable, ioaddr + EL3_CMD);
658 }
659 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
660 }
661 }
662 if (++i > 10) {
663 netdev_err(dev, "infinite loop in interrupt, status %4.4x.\n",
664 status);
665 /* Clear all interrupts */
666 outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
667 break;
668 }
669 /* Acknowledge the IRQ. */
670 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
671 }
672 lp->last_irq = jiffies;
673 spin_unlock(&lp->lock);
674 netdev_dbg(dev, "exiting interrupt, status %4.4x.\n",
675 inw(ioaddr + EL3_STATUS));
676 return IRQ_RETVAL(handled);
677 }
678
679 static void media_check(struct timer_list *t)
680 {
681 struct el3_private *lp = from_timer(lp, t, media);
682 struct net_device *dev = lp->p_dev->priv;
683 unsigned int ioaddr = dev->base_addr;
684 u16 media, errs;
685 unsigned long flags;
686
687 if (!netif_device_present(dev))
688 goto reschedule;
689
690 /* Check for pending interrupt with expired latency timer: with
691 * this, we can limp along even if the interrupt is blocked
692 */
693 if ((inw(ioaddr + EL3_STATUS) & IntLatch) &&
694 (inb(ioaddr + EL3_TIMER) == 0xff)) {
695 if (!lp->fast_poll)
696 netdev_warn(dev, "interrupt(s) dropped!\n");
697
698 local_irq_save(flags);
699 el3_interrupt(dev->irq, dev);
700 local_irq_restore(flags);
701
702 lp->fast_poll = HZ;
703 }
704 if (lp->fast_poll) {
705 lp->fast_poll--;
706 lp->media.expires = jiffies + HZ/100;
707 add_timer(&lp->media);
708 return;
709 }
710
711 /* lp->lock guards the EL3 window. Window should always be 1 except
712 * when the lock is held
713 */
714
715 spin_lock_irqsave(&lp->lock, flags);
716 EL3WINDOW(4);
717 media = inw(ioaddr+WN4_MEDIA) & 0xc810;
718
719 /* Ignore collisions unless we've had no irq's recently */
720 if (time_before(jiffies, lp->last_irq + HZ)) {
721 media &= ~0x0010;
722 } else {
723 /* Try harder to detect carrier errors */
724 EL3WINDOW(6);
725 outw(StatsDisable, ioaddr + EL3_CMD);
726 errs = inb(ioaddr + 0);
727 outw(StatsEnable, ioaddr + EL3_CMD);
728 dev->stats.tx_carrier_errors += errs;
729 if (errs || (lp->media_status & 0x0010))
730 media |= 0x0010;
731 }
732
733 if (media != lp->media_status) {
734 if ((media & lp->media_status & 0x8000) &&
735 ((lp->media_status ^ media) & 0x0800))
736 netdev_info(dev, "%s link beat\n",
737 (lp->media_status & 0x0800 ? "lost" : "found"));
738 else if ((media & lp->media_status & 0x4000) &&
739 ((lp->media_status ^ media) & 0x0010))
740 netdev_info(dev, "coax cable %s\n",
741 (lp->media_status & 0x0010 ? "ok" : "problem"));
742 if (dev->if_port == 0) {
743 if (media & 0x8000) {
744 if (media & 0x0800)
745 netdev_info(dev, "flipped to 10baseT\n");
746 else
747 tc589_set_xcvr(dev, 2);
748 } else if (media & 0x4000) {
749 if (media & 0x0010)
750 tc589_set_xcvr(dev, 1);
751 else
752 netdev_info(dev, "flipped to 10base2\n");
753 }
754 }
755 lp->media_status = media;
756 }
757
758 EL3WINDOW(1);
759 spin_unlock_irqrestore(&lp->lock, flags);
760
761 reschedule:
762 lp->media.expires = jiffies + HZ;
763 add_timer(&lp->media);
764 }
765
766 static struct net_device_stats *el3_get_stats(struct net_device *dev)
767 {
768 struct el3_private *lp = netdev_priv(dev);
769 unsigned long flags;
770 struct pcmcia_device *link = lp->p_dev;
771
772 if (pcmcia_dev_present(link)) {
773 spin_lock_irqsave(&lp->lock, flags);
774 update_stats(dev);
775 spin_unlock_irqrestore(&lp->lock, flags);
776 }
777 return &dev->stats;
778 }
779
780 /* Update statistics. We change to register window 6, so this should be run
781 * single-threaded if the device is active. This is expected to be a rare
782 * operation, and it's simpler for the rest of the driver to assume that
783 * window 1 is always valid rather than use a special window-state variable.
784 *
785 * Caller must hold the lock for this
786 */
787
788 static void update_stats(struct net_device *dev)
789 {
790 unsigned int ioaddr = dev->base_addr;
791
792 netdev_dbg(dev, "updating the statistics.\n");
793 /* Turn off statistics updates while reading. */
794 outw(StatsDisable, ioaddr + EL3_CMD);
795 /* Switch to the stats window, and read everything. */
796 EL3WINDOW(6);
797 dev->stats.tx_carrier_errors += inb(ioaddr + 0);
798 dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
799 /* Multiple collisions. */
800 inb(ioaddr + 2);
801 dev->stats.collisions += inb(ioaddr + 3);
802 dev->stats.tx_window_errors += inb(ioaddr + 4);
803 dev->stats.rx_fifo_errors += inb(ioaddr + 5);
804 dev->stats.tx_packets += inb(ioaddr + 6);
805 /* Rx packets */
806 inb(ioaddr + 7);
807 /* Tx deferrals */
808 inb(ioaddr + 8);
809 /* Rx octets */
810 inw(ioaddr + 10);
811 /* Tx octets */
812 inw(ioaddr + 12);
813
814 /* Back to window 1, and turn statistics back on. */
815 EL3WINDOW(1);
816 outw(StatsEnable, ioaddr + EL3_CMD);
817 }
818
819 static int el3_rx(struct net_device *dev)
820 {
821 unsigned int ioaddr = dev->base_addr;
822 int worklimit = 32;
823 short rx_status;
824
825 netdev_dbg(dev, "in rx_packet(), status %4.4x, rx_status %4.4x.\n",
826 inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
827 while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
828 worklimit > 0) {
829 worklimit--;
830 if (rx_status & 0x4000) { /* Error, update stats. */
831 short error = rx_status & 0x3800;
832 dev->stats.rx_errors++;
833 switch (error) {
834 case 0x0000:
835 dev->stats.rx_over_errors++;
836 break;
837 case 0x0800:
838 dev->stats.rx_length_errors++;
839 break;
840 case 0x1000:
841 dev->stats.rx_frame_errors++;
842 break;
843 case 0x1800:
844 dev->stats.rx_length_errors++;
845 break;
846 case 0x2000:
847 dev->stats.rx_frame_errors++;
848 break;
849 case 0x2800:
850 dev->stats.rx_crc_errors++;
851 break;
852 }
853 } else {
854 short pkt_len = rx_status & 0x7ff;
855 struct sk_buff *skb;
856
857 skb = netdev_alloc_skb(dev, pkt_len + 5);
858
859 netdev_dbg(dev, " Receiving packet size %d status %4.4x.\n",
860 pkt_len, rx_status);
861 if (skb != NULL) {
862 skb_reserve(skb, 2);
863 insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
864 (pkt_len+3)>>2);
865 skb->protocol = eth_type_trans(skb, dev);
866 netif_rx(skb);
867 dev->stats.rx_packets++;
868 dev->stats.rx_bytes += pkt_len;
869 } else {
870 netdev_dbg(dev, "couldn't allocate a sk_buff of size %d.\n",
871 pkt_len);
872 dev->stats.rx_dropped++;
873 }
874 }
875 /* Pop the top of the Rx FIFO */
876 tc589_wait_for_completion(dev, RxDiscard);
877 }
878 if (worklimit == 0)
879 netdev_warn(dev, "too much work in el3_rx!\n");
880 return 0;
881 }
882
883 static void set_rx_mode(struct net_device *dev)
884 {
885 unsigned int ioaddr = dev->base_addr;
886 u16 opts = SetRxFilter | RxStation | RxBroadcast;
887
888 if (dev->flags & IFF_PROMISC)
889 opts |= RxMulticast | RxProm;
890 else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI))
891 opts |= RxMulticast;
892 outw(opts, ioaddr + EL3_CMD);
893 }
894
895 static void set_multicast_list(struct net_device *dev)
896 {
897 struct el3_private *priv = netdev_priv(dev);
898 unsigned long flags;
899
900 spin_lock_irqsave(&priv->lock, flags);
901 set_rx_mode(dev);
902 spin_unlock_irqrestore(&priv->lock, flags);
903 }
904
905 static int el3_close(struct net_device *dev)
906 {
907 struct el3_private *lp = netdev_priv(dev);
908 struct pcmcia_device *link = lp->p_dev;
909 unsigned int ioaddr = dev->base_addr;
910
911 dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name);
912
913 if (pcmcia_dev_present(link)) {
914 /* Turn off statistics ASAP. We update dev->stats below. */
915 outw(StatsDisable, ioaddr + EL3_CMD);
916
917 /* Disable the receiver and transmitter. */
918 outw(RxDisable, ioaddr + EL3_CMD);
919 outw(TxDisable, ioaddr + EL3_CMD);
920
921 if (dev->if_port == 2)
922 /* Turn off thinnet power. Green! */
923 outw(StopCoax, ioaddr + EL3_CMD);
924 else if (dev->if_port == 1) {
925 /* Disable link beat and jabber */
926 EL3WINDOW(4);
927 outw(0, ioaddr + WN4_MEDIA);
928 }
929
930 /* Switching back to window 0 disables the IRQ. */
931 EL3WINDOW(0);
932 /* But we explicitly zero the IRQ line select anyway. */
933 outw(0x0f00, ioaddr + WN0_IRQ);
934
935 /* Check if the card still exists */
936 if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000)
937 update_stats(dev);
938 }
939
940 link->open--;
941 netif_stop_queue(dev);
942 del_timer_sync(&lp->media);
943
944 return 0;
945 }
946
947 static const struct pcmcia_device_id tc589_ids[] = {
948 PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562),
949 PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77),
950 PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589),
951 PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202),
952 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "cis/3CXEM556.cis"),
953 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "cis/3CXEM556.cis"),
954 PCMCIA_DEVICE_NULL,
955 };
956 MODULE_DEVICE_TABLE(pcmcia, tc589_ids);
957
958 static struct pcmcia_driver tc589_driver = {
959 .owner = THIS_MODULE,
960 .name = "3c589_cs",
961 .probe = tc589_probe,
962 .remove = tc589_detach,
963 .id_table = tc589_ids,
964 .suspend = tc589_suspend,
965 .resume = tc589_resume,
966 };
967 module_pcmcia_driver(tc589_driver);
CRIS linux kernel tree