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