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pcmcia: move driver name to struct pcmcia_driver
[deliverable/linux.git] / drivers / net / pcmcia / 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 #define DRV_NAME "3c589_cs"
23 #define DRV_VERSION "1.162-ac"
24
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/kernel.h>
28 #include <linux/ptrace.h>
29 #include <linux/slab.h>
30 #include <linux/string.h>
31 #include <linux/timer.h>
32 #include <linux/interrupt.h>
33 #include <linux/in.h>
34 #include <linux/delay.h>
35 #include <linux/ethtool.h>
36 #include <linux/netdevice.h>
37 #include <linux/etherdevice.h>
38 #include <linux/skbuff.h>
39 #include <linux/if_arp.h>
40 #include <linux/ioport.h>
41 #include <linux/bitops.h>
42 #include <linux/jiffies.h>
43
44 #include <pcmcia/cistpl.h>
45 #include <pcmcia/cisreg.h>
46 #include <pcmcia/ciscode.h>
47 #include <pcmcia/ds.h>
48
49 #include <asm/uaccess.h>
50 #include <asm/io.h>
51 #include <asm/system.h>
52
53 /* To minimize the size of the driver source I only define operating
54 constants if they are used several times. You'll need the manual
55 if you want to understand driver details. */
56 /* Offsets from base I/O address. */
57 #define EL3_DATA 0x00
58 #define EL3_TIMER 0x0a
59 #define EL3_CMD 0x0e
60 #define EL3_STATUS 0x0e
61
62 #define EEPROM_READ 0x0080
63 #define EEPROM_BUSY 0x8000
64
65 #define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
66
67 /* The top five bits written to EL3_CMD are a command, the lower
68 11 bits are the parameter, if applicable. */
69 enum c509cmd {
70 TotalReset = 0<<11,
71 SelectWindow = 1<<11,
72 StartCoax = 2<<11,
73 RxDisable = 3<<11,
74 RxEnable = 4<<11,
75 RxReset = 5<<11,
76 RxDiscard = 8<<11,
77 TxEnable = 9<<11,
78 TxDisable = 10<<11,
79 TxReset = 11<<11,
80 FakeIntr = 12<<11,
81 AckIntr = 13<<11,
82 SetIntrEnb = 14<<11,
83 SetStatusEnb = 15<<11,
84 SetRxFilter = 16<<11,
85 SetRxThreshold = 17<<11,
86 SetTxThreshold = 18<<11,
87 SetTxStart = 19<<11,
88 StatsEnable = 21<<11,
89 StatsDisable = 22<<11,
90 StopCoax = 23<<11
91 };
92
93 enum c509status {
94 IntLatch = 0x0001,
95 AdapterFailure = 0x0002,
96 TxComplete = 0x0004,
97 TxAvailable = 0x0008,
98 RxComplete = 0x0010,
99 RxEarly = 0x0020,
100 IntReq = 0x0040,
101 StatsFull = 0x0080,
102 CmdBusy = 0x1000
103 };
104
105 /* The SetRxFilter command accepts the following classes: */
106 enum RxFilter {
107 RxStation = 1,
108 RxMulticast = 2,
109 RxBroadcast = 4,
110 RxProm = 8
111 };
112
113 /* Register window 1 offsets, the window used in normal operation. */
114 #define TX_FIFO 0x00
115 #define RX_FIFO 0x00
116 #define RX_STATUS 0x08
117 #define TX_STATUS 0x0B
118 #define TX_FREE 0x0C /* Remaining free bytes in Tx buffer. */
119
120 #define WN0_IRQ 0x08 /* Window 0: Set IRQ line in bits 12-15. */
121 #define WN4_MEDIA 0x0A /* Window 4: Various transcvr/media bits. */
122 #define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */
123 #define MEDIA_LED 0x0001 /* Enable link light on 3C589E cards. */
124
125 /* Time in jiffies before concluding Tx hung */
126 #define TX_TIMEOUT ((400*HZ)/1000)
127
128 struct el3_private {
129 struct pcmcia_device *p_dev;
130 /* For transceiver monitoring */
131 struct timer_list media;
132 u16 media_status;
133 u16 fast_poll;
134 unsigned long last_irq;
135 spinlock_t lock;
136 };
137
138 static const char *if_names[] = { "auto", "10baseT", "10base2", "AUI" };
139
140 /*====================================================================*/
141
142 /* Module parameters */
143
144 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
145 MODULE_DESCRIPTION("3Com 3c589 series PCMCIA ethernet driver");
146 MODULE_LICENSE("GPL");
147
148 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
149
150 /* Special hook for setting if_port when module is loaded */
151 INT_MODULE_PARM(if_port, 0);
152
153
154 /*====================================================================*/
155
156 static int tc589_config(struct pcmcia_device *link);
157 static void tc589_release(struct pcmcia_device *link);
158
159 static u16 read_eeprom(unsigned int ioaddr, int index);
160 static void tc589_reset(struct net_device *dev);
161 static void media_check(unsigned long arg);
162 static int el3_config(struct net_device *dev, struct ifmap *map);
163 static int el3_open(struct net_device *dev);
164 static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
165 struct net_device *dev);
166 static irqreturn_t el3_interrupt(int irq, void *dev_id);
167 static void update_stats(struct net_device *dev);
168 static struct net_device_stats *el3_get_stats(struct net_device *dev);
169 static int el3_rx(struct net_device *dev);
170 static int el3_close(struct net_device *dev);
171 static void el3_tx_timeout(struct net_device *dev);
172 static void set_rx_mode(struct net_device *dev);
173 static void set_multicast_list(struct net_device *dev);
174 static const struct ethtool_ops netdev_ethtool_ops;
175
176 static void tc589_detach(struct pcmcia_device *p_dev);
177
178 /*======================================================================
179
180 tc589_attach() creates an "instance" of the driver, allocating
181 local data structures for one device. The device is registered
182 with Card Services.
183
184 ======================================================================*/
185
186 static const struct net_device_ops el3_netdev_ops = {
187 .ndo_open = el3_open,
188 .ndo_stop = el3_close,
189 .ndo_start_xmit = el3_start_xmit,
190 .ndo_tx_timeout = el3_tx_timeout,
191 .ndo_set_config = el3_config,
192 .ndo_get_stats = el3_get_stats,
193 .ndo_set_multicast_list = set_multicast_list,
194 .ndo_change_mtu = eth_change_mtu,
195 .ndo_set_mac_address = eth_mac_addr,
196 .ndo_validate_addr = eth_validate_addr,
197 };
198
199 static int tc589_probe(struct pcmcia_device *link)
200 {
201 struct el3_private *lp;
202 struct net_device *dev;
203
204 dev_dbg(&link->dev, "3c589_attach()\n");
205
206 /* Create new ethernet device */
207 dev = alloc_etherdev(sizeof(struct el3_private));
208 if (!dev)
209 return -ENOMEM;
210 lp = netdev_priv(dev);
211 link->priv = dev;
212 lp->p_dev = link;
213
214 spin_lock_init(&lp->lock);
215 link->resource[0]->end = 16;
216 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_16;
217
218 link->config_flags |= CONF_ENABLE_IRQ;
219 link->config_index = 1;
220
221 dev->netdev_ops = &el3_netdev_ops;
222 dev->watchdog_timeo = TX_TIMEOUT;
223
224 SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
225
226 return tc589_config(link);
227 } /* tc589_attach */
228
229 /*======================================================================
230
231 This deletes a driver "instance". The device is de-registered
232 with Card Services. If it has been released, all local data
233 structures are freed. Otherwise, the structures will be freed
234 when the device is released.
235
236 ======================================================================*/
237
238 static void tc589_detach(struct pcmcia_device *link)
239 {
240 struct net_device *dev = link->priv;
241
242 dev_dbg(&link->dev, "3c589_detach\n");
243
244 unregister_netdev(dev);
245
246 tc589_release(link);
247
248 free_netdev(dev);
249 } /* tc589_detach */
250
251 /*======================================================================
252
253 tc589_config() is scheduled to run after a CARD_INSERTION event
254 is received, to configure the PCMCIA socket, and to make the
255 ethernet device available to the system.
256
257 ======================================================================*/
258
259 static int tc589_config(struct pcmcia_device *link)
260 {
261 struct net_device *dev = link->priv;
262 __be16 *phys_addr;
263 int ret, i, j, multi = 0, fifo;
264 unsigned int ioaddr;
265 char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
266 u8 *buf;
267 size_t len;
268
269 dev_dbg(&link->dev, "3c589_config\n");
270
271 phys_addr = (__be16 *)dev->dev_addr;
272 /* Is this a 3c562? */
273 if (link->manf_id != MANFID_3COM)
274 printk(KERN_INFO "3c589_cs: hmmm, is this really a "
275 "3Com card??\n");
276 multi = (link->card_id == PRODID_3COM_3C562);
277
278 link->io_lines = 16;
279
280 /* For the 3c562, the base address must be xx00-xx7f */
281 for (i = j = 0; j < 0x400; j += 0x10) {
282 if (multi && (j & 0x80)) continue;
283 link->resource[0]->start = j ^ 0x300;
284 i = pcmcia_request_io(link);
285 if (i == 0)
286 break;
287 }
288 if (i != 0)
289 goto failed;
290
291 ret = pcmcia_request_irq(link, el3_interrupt);
292 if (ret)
293 goto failed;
294
295 ret = pcmcia_enable_device(link);
296 if (ret)
297 goto failed;
298
299 dev->irq = link->irq;
300 dev->base_addr = link->resource[0]->start;
301 ioaddr = dev->base_addr;
302 EL3WINDOW(0);
303
304 /* The 3c589 has an extra EEPROM for configuration info, including
305 the hardware address. The 3c562 puts the address in the CIS. */
306 len = pcmcia_get_tuple(link, 0x88, &buf);
307 if (buf && len >= 6) {
308 for (i = 0; i < 3; i++)
309 phys_addr[i] = htons(le16_to_cpu(buf[i*2]));
310 kfree(buf);
311 } else {
312 kfree(buf); /* 0 < len < 6 */
313 for (i = 0; i < 3; i++)
314 phys_addr[i] = htons(read_eeprom(ioaddr, i));
315 if (phys_addr[0] == htons(0x6060)) {
316 printk(KERN_ERR "3c589_cs: IO port conflict at 0x%03lx"
317 "-0x%03lx\n", dev->base_addr, dev->base_addr+15);
318 goto failed;
319 }
320 }
321
322 /* The address and resource configuration register aren't loaded from
323 the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version. */
324 outw(0x3f00, ioaddr + 8);
325 fifo = inl(ioaddr);
326
327 /* The if_port symbol can be set when the module is loaded */
328 if ((if_port >= 0) && (if_port <= 3))
329 dev->if_port = if_port;
330 else
331 printk(KERN_ERR "3c589_cs: invalid if_port requested\n");
332
333 SET_NETDEV_DEV(dev, &link->dev);
334
335 if (register_netdev(dev) != 0) {
336 printk(KERN_ERR "3c589_cs: register_netdev() failed\n");
337 goto failed;
338 }
339
340 netdev_info(dev, "3Com 3c%s, io %#3lx, irq %d, hw_addr %pM\n",
341 (multi ? "562" : "589"), dev->base_addr, dev->irq,
342 dev->dev_addr);
343 netdev_info(dev, " %dK FIFO split %s Rx:Tx, %s xcvr\n",
344 (fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3],
345 if_names[dev->if_port]);
346 return 0;
347
348 failed:
349 tc589_release(link);
350 return -ENODEV;
351 } /* tc589_config */
352
353 /*======================================================================
354
355 After a card is removed, tc589_release() will unregister the net
356 device, and release the PCMCIA configuration. If the device is
357 still open, this will be postponed until it is closed.
358
359 ======================================================================*/
360
361 static void tc589_release(struct pcmcia_device *link)
362 {
363 pcmcia_disable_device(link);
364 }
365
366 static int tc589_suspend(struct pcmcia_device *link)
367 {
368 struct net_device *dev = link->priv;
369
370 if (link->open)
371 netif_device_detach(dev);
372
373 return 0;
374 }
375
376 static int tc589_resume(struct pcmcia_device *link)
377 {
378 struct net_device *dev = link->priv;
379
380 if (link->open) {
381 tc589_reset(dev);
382 netif_device_attach(dev);
383 }
384
385 return 0;
386 }
387
388 /*====================================================================*/
389
390 /*
391 Use this for commands that may take time to finish
392 */
393 static void tc589_wait_for_completion(struct net_device *dev, int cmd)
394 {
395 int i = 100;
396 outw(cmd, dev->base_addr + EL3_CMD);
397 while (--i > 0)
398 if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break;
399 if (i == 0)
400 netdev_warn(dev, "command 0x%04x did not complete!\n", cmd);
401 }
402
403 /*
404 Read a word from the EEPROM using the regular EEPROM access register.
405 Assume that we are in register window zero.
406 */
407 static u16 read_eeprom(unsigned int ioaddr, int index)
408 {
409 int i;
410 outw(EEPROM_READ + index, ioaddr + 10);
411 /* Reading the eeprom takes 162 us */
412 for (i = 1620; i >= 0; i--)
413 if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
414 break;
415 return inw(ioaddr + 12);
416 }
417
418 /*
419 Set transceiver type, perhaps to something other than what the user
420 specified in dev->if_port.
421 */
422 static void tc589_set_xcvr(struct net_device *dev, int if_port)
423 {
424 struct el3_private *lp = netdev_priv(dev);
425 unsigned int ioaddr = dev->base_addr;
426
427 EL3WINDOW(0);
428 switch (if_port) {
429 case 0: case 1: outw(0, ioaddr + 6); break;
430 case 2: outw(3<<14, ioaddr + 6); break;
431 case 3: outw(1<<14, ioaddr + 6); break;
432 }
433 /* On PCMCIA, this just turns on the LED */
434 outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD);
435 /* 10baseT interface, enable link beat and jabber check. */
436 EL3WINDOW(4);
437 outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA);
438 EL3WINDOW(1);
439 if (if_port == 2)
440 lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000);
441 else
442 lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800);
443 }
444
445 static void dump_status(struct net_device *dev)
446 {
447 unsigned int ioaddr = dev->base_addr;
448 EL3WINDOW(1);
449 netdev_info(dev, " irq status %04x, rx status %04x, tx status %02x tx free %04x\n",
450 inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS),
451 inb(ioaddr+TX_STATUS), inw(ioaddr+TX_FREE));
452 EL3WINDOW(4);
453 netdev_info(dev, " diagnostics: fifo %04x net %04x ethernet %04x media %04x\n",
454 inw(ioaddr+0x04), inw(ioaddr+0x06), inw(ioaddr+0x08),
455 inw(ioaddr+0x0a));
456 EL3WINDOW(1);
457 }
458
459 /* Reset and restore all of the 3c589 registers. */
460 static void tc589_reset(struct net_device *dev)
461 {
462 unsigned int ioaddr = dev->base_addr;
463 int i;
464
465 EL3WINDOW(0);
466 outw(0x0001, ioaddr + 4); /* Activate board. */
467 outw(0x3f00, ioaddr + 8); /* Set the IRQ line. */
468
469 /* Set the station address in window 2. */
470 EL3WINDOW(2);
471 for (i = 0; i < 6; i++)
472 outb(dev->dev_addr[i], ioaddr + i);
473
474 tc589_set_xcvr(dev, dev->if_port);
475
476 /* Switch to the stats window, and clear all stats by reading. */
477 outw(StatsDisable, ioaddr + EL3_CMD);
478 EL3WINDOW(6);
479 for (i = 0; i < 9; i++)
480 inb(ioaddr+i);
481 inw(ioaddr + 10);
482 inw(ioaddr + 12);
483
484 /* Switch to register set 1 for normal use. */
485 EL3WINDOW(1);
486
487 set_rx_mode(dev);
488 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
489 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
490 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
491 /* Allow status bits to be seen. */
492 outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
493 /* Ack all pending events, and set active indicator mask. */
494 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
495 ioaddr + EL3_CMD);
496 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
497 | AdapterFailure, ioaddr + EL3_CMD);
498 }
499
500 static void netdev_get_drvinfo(struct net_device *dev,
501 struct ethtool_drvinfo *info)
502 {
503 strcpy(info->driver, DRV_NAME);
504 strcpy(info->version, DRV_VERSION);
505 sprintf(info->bus_info, "PCMCIA 0x%lx", dev->base_addr);
506 }
507
508 static const struct ethtool_ops netdev_ethtool_ops = {
509 .get_drvinfo = netdev_get_drvinfo,
510 };
511
512 static int el3_config(struct net_device *dev, struct ifmap *map)
513 {
514 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
515 if (map->port <= 3) {
516 dev->if_port = map->port;
517 netdev_info(dev, "switched to %s port\n", if_names[dev->if_port]);
518 tc589_set_xcvr(dev, dev->if_port);
519 } else
520 return -EINVAL;
521 }
522 return 0;
523 }
524
525 static int el3_open(struct net_device *dev)
526 {
527 struct el3_private *lp = netdev_priv(dev);
528 struct pcmcia_device *link = lp->p_dev;
529
530 if (!pcmcia_dev_present(link))
531 return -ENODEV;
532
533 link->open++;
534 netif_start_queue(dev);
535
536 tc589_reset(dev);
537 init_timer(&lp->media);
538 lp->media.function = &media_check;
539 lp->media.data = (unsigned long) dev;
540 lp->media.expires = jiffies + HZ;
541 add_timer(&lp->media);
542
543 dev_dbg(&link->dev, "%s: opened, status %4.4x.\n",
544 dev->name, inw(dev->base_addr + EL3_STATUS));
545
546 return 0;
547 }
548
549 static void el3_tx_timeout(struct net_device *dev)
550 {
551 unsigned int ioaddr = dev->base_addr;
552
553 netdev_warn(dev, "Transmit timed out!\n");
554 dump_status(dev);
555 dev->stats.tx_errors++;
556 dev->trans_start = jiffies; /* prevent tx timeout */
557 /* Issue TX_RESET and TX_START commands. */
558 tc589_wait_for_completion(dev, TxReset);
559 outw(TxEnable, ioaddr + EL3_CMD);
560 netif_wake_queue(dev);
561 }
562
563 static void pop_tx_status(struct net_device *dev)
564 {
565 unsigned int ioaddr = dev->base_addr;
566 int i;
567
568 /* Clear the Tx status stack. */
569 for (i = 32; i > 0; i--) {
570 u_char tx_status = inb(ioaddr + TX_STATUS);
571 if (!(tx_status & 0x84)) break;
572 /* reset transmitter on jabber error or underrun */
573 if (tx_status & 0x30)
574 tc589_wait_for_completion(dev, TxReset);
575 if (tx_status & 0x38) {
576 netdev_dbg(dev, "transmit error: status 0x%02x\n", tx_status);
577 outw(TxEnable, ioaddr + EL3_CMD);
578 dev->stats.tx_aborted_errors++;
579 }
580 outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
581 }
582 }
583
584 static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
585 struct net_device *dev)
586 {
587 unsigned int ioaddr = dev->base_addr;
588 struct el3_private *priv = netdev_priv(dev);
589 unsigned long flags;
590
591 netdev_dbg(dev, "el3_start_xmit(length = %ld) called, status %4.4x.\n",
592 (long)skb->len, inw(ioaddr + EL3_STATUS));
593
594 spin_lock_irqsave(&priv->lock, flags);
595
596 dev->stats.tx_bytes += skb->len;
597
598 /* Put out the doubleword header... */
599 outw(skb->len, ioaddr + TX_FIFO);
600 outw(0x00, ioaddr + TX_FIFO);
601 /* ... and the packet rounded to a doubleword. */
602 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
603
604 if (inw(ioaddr + TX_FREE) <= 1536) {
605 netif_stop_queue(dev);
606 /* Interrupt us when the FIFO has room for max-sized packet. */
607 outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
608 }
609
610 pop_tx_status(dev);
611 spin_unlock_irqrestore(&priv->lock, flags);
612 dev_kfree_skb(skb);
613
614 return NETDEV_TX_OK;
615 }
616
617 /* The EL3 interrupt handler. */
618 static irqreturn_t el3_interrupt(int irq, void *dev_id)
619 {
620 struct net_device *dev = (struct net_device *) dev_id;
621 struct el3_private *lp = netdev_priv(dev);
622 unsigned int ioaddr;
623 __u16 status;
624 int i = 0, handled = 1;
625
626 if (!netif_device_present(dev))
627 return IRQ_NONE;
628
629 ioaddr = dev->base_addr;
630
631 netdev_dbg(dev, "interrupt, status %4.4x.\n", inw(ioaddr + EL3_STATUS));
632
633 spin_lock(&lp->lock);
634 while ((status = inw(ioaddr + EL3_STATUS)) &
635 (IntLatch | RxComplete | StatsFull)) {
636 if ((status & 0xe000) != 0x2000) {
637 netdev_dbg(dev, "interrupt from dead card\n");
638 handled = 0;
639 break;
640 }
641 if (status & RxComplete)
642 el3_rx(dev);
643 if (status & TxAvailable) {
644 netdev_dbg(dev, " TX room bit was handled.\n");
645 /* There's room in the FIFO for a full-sized packet. */
646 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
647 netif_wake_queue(dev);
648 }
649 if (status & TxComplete)
650 pop_tx_status(dev);
651 if (status & (AdapterFailure | RxEarly | StatsFull)) {
652 /* Handle all uncommon interrupts. */
653 if (status & StatsFull) /* Empty statistics. */
654 update_stats(dev);
655 if (status & RxEarly) { /* Rx early is unused. */
656 el3_rx(dev);
657 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
658 }
659 if (status & AdapterFailure) {
660 u16 fifo_diag;
661 EL3WINDOW(4);
662 fifo_diag = inw(ioaddr + 4);
663 EL3WINDOW(1);
664 netdev_warn(dev, "adapter failure, FIFO diagnostic register %04x.\n",
665 fifo_diag);
666 if (fifo_diag & 0x0400) {
667 /* Tx overrun */
668 tc589_wait_for_completion(dev, TxReset);
669 outw(TxEnable, ioaddr + EL3_CMD);
670 }
671 if (fifo_diag & 0x2000) {
672 /* Rx underrun */
673 tc589_wait_for_completion(dev, RxReset);
674 set_rx_mode(dev);
675 outw(RxEnable, ioaddr + EL3_CMD);
676 }
677 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
678 }
679 }
680 if (++i > 10) {
681 netdev_err(dev, "infinite loop in interrupt, status %4.4x.\n",
682 status);
683 /* Clear all interrupts */
684 outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
685 break;
686 }
687 /* Acknowledge the IRQ. */
688 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
689 }
690 lp->last_irq = jiffies;
691 spin_unlock(&lp->lock);
692 netdev_dbg(dev, "exiting interrupt, status %4.4x.\n",
693 inw(ioaddr + EL3_STATUS));
694 return IRQ_RETVAL(handled);
695 }
696
697 static void media_check(unsigned long arg)
698 {
699 struct net_device *dev = (struct net_device *)(arg);
700 struct el3_private *lp = netdev_priv(dev);
701 unsigned int ioaddr = dev->base_addr;
702 u16 media, errs;
703 unsigned long flags;
704
705 if (!netif_device_present(dev)) goto reschedule;
706
707 /* Check for pending interrupt with expired latency timer: with
708 this, we can limp along even if the interrupt is blocked */
709 if ((inw(ioaddr + EL3_STATUS) & IntLatch) &&
710 (inb(ioaddr + EL3_TIMER) == 0xff)) {
711 if (!lp->fast_poll)
712 netdev_warn(dev, "interrupt(s) dropped!\n");
713
714 local_irq_save(flags);
715 el3_interrupt(dev->irq, dev);
716 local_irq_restore(flags);
717
718 lp->fast_poll = HZ;
719 }
720 if (lp->fast_poll) {
721 lp->fast_poll--;
722 lp->media.expires = jiffies + HZ/100;
723 add_timer(&lp->media);
724 return;
725 }
726
727 /* lp->lock guards the EL3 window. Window should always be 1 except
728 when the lock is held */
729 spin_lock_irqsave(&lp->lock, flags);
730 EL3WINDOW(4);
731 media = inw(ioaddr+WN4_MEDIA) & 0xc810;
732
733 /* Ignore collisions unless we've had no irq's recently */
734 if (time_before(jiffies, lp->last_irq + HZ)) {
735 media &= ~0x0010;
736 } else {
737 /* Try harder to detect carrier errors */
738 EL3WINDOW(6);
739 outw(StatsDisable, ioaddr + EL3_CMD);
740 errs = inb(ioaddr + 0);
741 outw(StatsEnable, ioaddr + EL3_CMD);
742 dev->stats.tx_carrier_errors += errs;
743 if (errs || (lp->media_status & 0x0010)) media |= 0x0010;
744 }
745
746 if (media != lp->media_status) {
747 if ((media & lp->media_status & 0x8000) &&
748 ((lp->media_status ^ media) & 0x0800))
749 netdev_info(dev, "%s link beat\n",
750 (lp->media_status & 0x0800 ? "lost" : "found"));
751 else if ((media & lp->media_status & 0x4000) &&
752 ((lp->media_status ^ media) & 0x0010))
753 netdev_info(dev, "coax cable %s\n",
754 (lp->media_status & 0x0010 ? "ok" : "problem"));
755 if (dev->if_port == 0) {
756 if (media & 0x8000) {
757 if (media & 0x0800)
758 netdev_info(dev, "flipped to 10baseT\n");
759 else
760 tc589_set_xcvr(dev, 2);
761 } else if (media & 0x4000) {
762 if (media & 0x0010)
763 tc589_set_xcvr(dev, 1);
764 else
765 netdev_info(dev, "flipped to 10base2\n");
766 }
767 }
768 lp->media_status = media;
769 }
770
771 EL3WINDOW(1);
772 spin_unlock_irqrestore(&lp->lock, flags);
773
774 reschedule:
775 lp->media.expires = jiffies + HZ;
776 add_timer(&lp->media);
777 }
778
779 static struct net_device_stats *el3_get_stats(struct net_device *dev)
780 {
781 struct el3_private *lp = netdev_priv(dev);
782 unsigned long flags;
783 struct pcmcia_device *link = lp->p_dev;
784
785 if (pcmcia_dev_present(link)) {
786 spin_lock_irqsave(&lp->lock, flags);
787 update_stats(dev);
788 spin_unlock_irqrestore(&lp->lock, flags);
789 }
790 return &dev->stats;
791 }
792
793 /*
794 Update statistics. We change to register window 6, so this should be run
795 single-threaded if the device is active. This is expected to be a rare
796 operation, and it's simpler for the rest of the driver to assume that
797 window 1 is always valid rather than use a special window-state variable.
798
799 Caller must hold the lock for this
800 */
801 static void update_stats(struct net_device *dev)
802 {
803 unsigned int ioaddr = dev->base_addr;
804
805 netdev_dbg(dev, "updating the statistics.\n");
806 /* Turn off statistics updates while reading. */
807 outw(StatsDisable, ioaddr + EL3_CMD);
808 /* Switch to the stats window, and read everything. */
809 EL3WINDOW(6);
810 dev->stats.tx_carrier_errors += inb(ioaddr + 0);
811 dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
812 /* Multiple collisions. */ inb(ioaddr + 2);
813 dev->stats.collisions += inb(ioaddr + 3);
814 dev->stats.tx_window_errors += inb(ioaddr + 4);
815 dev->stats.rx_fifo_errors += inb(ioaddr + 5);
816 dev->stats.tx_packets += inb(ioaddr + 6);
817 /* Rx packets */ inb(ioaddr + 7);
818 /* Tx deferrals */ inb(ioaddr + 8);
819 /* Rx octets */ inw(ioaddr + 10);
820 /* Tx octets */ inw(ioaddr + 12);
821
822 /* Back to window 1, and turn statistics back on. */
823 EL3WINDOW(1);
824 outw(StatsEnable, ioaddr + EL3_CMD);
825 }
826
827 static int el3_rx(struct net_device *dev)
828 {
829 unsigned int ioaddr = dev->base_addr;
830 int worklimit = 32;
831 short rx_status;
832
833 netdev_dbg(dev, "in rx_packet(), status %4.4x, rx_status %4.4x.\n",
834 inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
835 while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
836 worklimit > 0) {
837 worklimit--;
838 if (rx_status & 0x4000) { /* Error, update stats. */
839 short error = rx_status & 0x3800;
840 dev->stats.rx_errors++;
841 switch (error) {
842 case 0x0000: dev->stats.rx_over_errors++; break;
843 case 0x0800: dev->stats.rx_length_errors++; break;
844 case 0x1000: dev->stats.rx_frame_errors++; break;
845 case 0x1800: dev->stats.rx_length_errors++; break;
846 case 0x2000: dev->stats.rx_frame_errors++; break;
847 case 0x2800: dev->stats.rx_crc_errors++; break;
848 }
849 } else {
850 short pkt_len = rx_status & 0x7ff;
851 struct sk_buff *skb;
852
853 skb = dev_alloc_skb(pkt_len+5);
854
855 netdev_dbg(dev, " Receiving packet size %d status %4.4x.\n",
856 pkt_len, rx_status);
857 if (skb != NULL) {
858 skb_reserve(skb, 2);
859 insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
860 (pkt_len+3)>>2);
861 skb->protocol = eth_type_trans(skb, dev);
862 netif_rx(skb);
863 dev->stats.rx_packets++;
864 dev->stats.rx_bytes += pkt_len;
865 } else {
866 netdev_dbg(dev, "couldn't allocate a sk_buff of size %d.\n",
867 pkt_len);
868 dev->stats.rx_dropped++;
869 }
870 }
871 /* Pop the top of the Rx FIFO */
872 tc589_wait_for_completion(dev, RxDiscard);
873 }
874 if (worklimit == 0)
875 netdev_warn(dev, "too much work in el3_rx!\n");
876 return 0;
877 }
878
879 static void set_rx_mode(struct net_device *dev)
880 {
881 unsigned int ioaddr = dev->base_addr;
882 u16 opts = SetRxFilter | RxStation | RxBroadcast;
883
884 if (dev->flags & IFF_PROMISC)
885 opts |= RxMulticast | RxProm;
886 else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI))
887 opts |= RxMulticast;
888 outw(opts, ioaddr + EL3_CMD);
889 }
890
891 static void set_multicast_list(struct net_device *dev)
892 {
893 struct el3_private *priv = netdev_priv(dev);
894 unsigned long flags;
895
896 spin_lock_irqsave(&priv->lock, flags);
897 set_rx_mode(dev);
898 spin_unlock_irqrestore(&priv->lock, flags);
899 }
900
901 static int el3_close(struct net_device *dev)
902 {
903 struct el3_private *lp = netdev_priv(dev);
904 struct pcmcia_device *link = lp->p_dev;
905 unsigned int ioaddr = dev->base_addr;
906
907 dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name);
908
909 if (pcmcia_dev_present(link)) {
910 /* Turn off statistics ASAP. We update dev->stats below. */
911 outw(StatsDisable, ioaddr + EL3_CMD);
912
913 /* Disable the receiver and transmitter. */
914 outw(RxDisable, ioaddr + EL3_CMD);
915 outw(TxDisable, ioaddr + EL3_CMD);
916
917 if (dev->if_port == 2)
918 /* Turn off thinnet power. Green! */
919 outw(StopCoax, ioaddr + EL3_CMD);
920 else if (dev->if_port == 1) {
921 /* Disable link beat and jabber */
922 EL3WINDOW(4);
923 outw(0, ioaddr + WN4_MEDIA);
924 }
925
926 /* Switching back to window 0 disables the IRQ. */
927 EL3WINDOW(0);
928 /* But we explicitly zero the IRQ line select anyway. */
929 outw(0x0f00, ioaddr + WN0_IRQ);
930
931 /* Check if the card still exists */
932 if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000)
933 update_stats(dev);
934 }
935
936 link->open--;
937 netif_stop_queue(dev);
938 del_timer_sync(&lp->media);
939
940 return 0;
941 }
942
943 static struct pcmcia_device_id tc589_ids[] = {
944 PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562),
945 PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77),
946 PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589),
947 PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202),
948 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "cis/3CXEM556.cis"),
949 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "cis/3CXEM556.cis"),
950 PCMCIA_DEVICE_NULL,
951 };
952 MODULE_DEVICE_TABLE(pcmcia, tc589_ids);
953
954 static struct pcmcia_driver tc589_driver = {
955 .owner = THIS_MODULE,
956 .name = "3c589_cs",
957 .probe = tc589_probe,
958 .remove = tc589_detach,
959 .id_table = tc589_ids,
960 .suspend = tc589_suspend,
961 .resume = tc589_resume,
962 };
963
964 static int __init init_tc589(void)
965 {
966 return pcmcia_register_driver(&tc589_driver);
967 }
968
969 static void __exit exit_tc589(void)
970 {
971 pcmcia_unregister_driver(&tc589_driver);
972 }
973
974 module_init(init_tc589);
975 module_exit(exit_tc589);
Linux kernel - Deliverables
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