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Merge commit 'kumar/merge' into merge
[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/cs_types.h>
45 #include <pcmcia/cs.h>
46 #include <pcmcia/cistpl.h>
47 #include <pcmcia/cisreg.h>
48 #include <pcmcia/ciscode.h>
49 #include <pcmcia/ds.h>
50
51 #include <asm/uaccess.h>
52 #include <asm/io.h>
53 #include <asm/system.h>
54
55 /* To minimize the size of the driver source I only define operating
56 constants if they are used several times. You'll need the manual
57 if you want to understand driver details. */
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 enum c509cmd {
72 TotalReset = 0<<11,
73 SelectWindow = 1<<11,
74 StartCoax = 2<<11,
75 RxDisable = 3<<11,
76 RxEnable = 4<<11,
77 RxReset = 5<<11,
78 RxDiscard = 8<<11,
79 TxEnable = 9<<11,
80 TxDisable = 10<<11,
81 TxReset = 11<<11,
82 FakeIntr = 12<<11,
83 AckIntr = 13<<11,
84 SetIntrEnb = 14<<11,
85 SetStatusEnb = 15<<11,
86 SetRxFilter = 16<<11,
87 SetRxThreshold = 17<<11,
88 SetTxThreshold = 18<<11,
89 SetTxStart = 19<<11,
90 StatsEnable = 21<<11,
91 StatsDisable = 22<<11,
92 StopCoax = 23<<11
93 };
94
95 enum c509status {
96 IntLatch = 0x0001,
97 AdapterFailure = 0x0002,
98 TxComplete = 0x0004,
99 TxAvailable = 0x0008,
100 RxComplete = 0x0010,
101 RxEarly = 0x0020,
102 IntReq = 0x0040,
103 StatsFull = 0x0080,
104 CmdBusy = 0x1000
105 };
106
107 /* The SetRxFilter command accepts the following classes: */
108 enum RxFilter {
109 RxStation = 1,
110 RxMulticast = 2,
111 RxBroadcast = 4,
112 RxProm = 8
113 };
114
115 /* Register window 1 offsets, the window used in normal operation. */
116 #define TX_FIFO 0x00
117 #define RX_FIFO 0x00
118 #define RX_STATUS 0x08
119 #define TX_STATUS 0x0B
120 #define TX_FREE 0x0C /* Remaining free bytes in Tx buffer. */
121
122 #define WN0_IRQ 0x08 /* Window 0: Set IRQ line in bits 12-15. */
123 #define WN4_MEDIA 0x0A /* Window 4: Various transcvr/media bits. */
124 #define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */
125 #define MEDIA_LED 0x0001 /* Enable link light on 3C589E cards. */
126
127 /* Time in jiffies before concluding Tx hung */
128 #define TX_TIMEOUT ((400*HZ)/1000)
129
130 struct el3_private {
131 struct pcmcia_device *p_dev;
132 /* For transceiver monitoring */
133 struct timer_list media;
134 u16 media_status;
135 u16 fast_poll;
136 unsigned long last_irq;
137 spinlock_t lock;
138 };
139
140 static const char *if_names[] = { "auto", "10baseT", "10base2", "AUI" };
141
142 /*====================================================================*/
143
144 /* Module parameters */
145
146 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
147 MODULE_DESCRIPTION("3Com 3c589 series PCMCIA ethernet driver");
148 MODULE_LICENSE("GPL");
149
150 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
151
152 /* Special hook for setting if_port when module is loaded */
153 INT_MODULE_PARM(if_port, 0);
154
155
156 /*====================================================================*/
157
158 static int tc589_config(struct pcmcia_device *link);
159 static void tc589_release(struct pcmcia_device *link);
160
161 static u16 read_eeprom(unsigned int ioaddr, int index);
162 static void tc589_reset(struct net_device *dev);
163 static void media_check(unsigned long arg);
164 static int el3_config(struct net_device *dev, struct ifmap *map);
165 static int el3_open(struct net_device *dev);
166 static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
167 struct net_device *dev);
168 static irqreturn_t el3_interrupt(int irq, void *dev_id);
169 static void update_stats(struct net_device *dev);
170 static struct net_device_stats *el3_get_stats(struct net_device *dev);
171 static int el3_rx(struct net_device *dev);
172 static int el3_close(struct net_device *dev);
173 static void el3_tx_timeout(struct net_device *dev);
174 static void set_rx_mode(struct net_device *dev);
175 static void set_multicast_list(struct net_device *dev);
176 static const struct ethtool_ops netdev_ethtool_ops;
177
178 static void tc589_detach(struct pcmcia_device *p_dev);
179
180 /*======================================================================
181
182 tc589_attach() creates an "instance" of the driver, allocating
183 local data structures for one device. The device is registered
184 with Card Services.
185
186 ======================================================================*/
187
188 static const struct net_device_ops el3_netdev_ops = {
189 .ndo_open = el3_open,
190 .ndo_stop = el3_close,
191 .ndo_start_xmit = el3_start_xmit,
192 .ndo_tx_timeout = el3_tx_timeout,
193 .ndo_set_config = el3_config,
194 .ndo_get_stats = el3_get_stats,
195 .ndo_set_multicast_list = set_multicast_list,
196 .ndo_change_mtu = eth_change_mtu,
197 .ndo_set_mac_address = eth_mac_addr,
198 .ndo_validate_addr = eth_validate_addr,
199 };
200
201 static int tc589_probe(struct pcmcia_device *link)
202 {
203 struct el3_private *lp;
204 struct net_device *dev;
205
206 dev_dbg(&link->dev, "3c589_attach()\n");
207
208 /* Create new ethernet device */
209 dev = alloc_etherdev(sizeof(struct el3_private));
210 if (!dev)
211 return -ENOMEM;
212 lp = netdev_priv(dev);
213 link->priv = dev;
214 lp->p_dev = link;
215
216 spin_lock_init(&lp->lock);
217 link->io.NumPorts1 = 16;
218 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
219
220 link->conf.Attributes = CONF_ENABLE_IRQ;
221 link->conf.IntType = INT_MEMORY_AND_IO;
222 link->conf.ConfigIndex = 1;
223
224 dev->netdev_ops = &el3_netdev_ops;
225 dev->watchdog_timeo = TX_TIMEOUT;
226
227 SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
228
229 return tc589_config(link);
230 } /* tc589_attach */
231
232 /*======================================================================
233
234 This deletes a driver "instance". The device is de-registered
235 with Card Services. If it has been released, all local data
236 structures are freed. Otherwise, the structures will be freed
237 when the device is released.
238
239 ======================================================================*/
240
241 static void tc589_detach(struct pcmcia_device *link)
242 {
243 struct net_device *dev = link->priv;
244
245 dev_dbg(&link->dev, "3c589_detach\n");
246
247 unregister_netdev(dev);
248
249 tc589_release(link);
250
251 free_netdev(dev);
252 } /* tc589_detach */
253
254 /*======================================================================
255
256 tc589_config() is scheduled to run after a CARD_INSERTION event
257 is received, to configure the PCMCIA socket, and to make the
258 ethernet device available to the system.
259
260 ======================================================================*/
261
262 static int tc589_config(struct pcmcia_device *link)
263 {
264 struct net_device *dev = link->priv;
265 __be16 *phys_addr;
266 int ret, i, j, multi = 0, fifo;
267 unsigned int ioaddr;
268 char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
269 u8 *buf;
270 size_t len;
271
272 dev_dbg(&link->dev, "3c589_config\n");
273
274 phys_addr = (__be16 *)dev->dev_addr;
275 /* Is this a 3c562? */
276 if (link->manf_id != MANFID_3COM)
277 printk(KERN_INFO "3c589_cs: hmmm, is this really a "
278 "3Com card??\n");
279 multi = (link->card_id == PRODID_3COM_3C562);
280
281 /* For the 3c562, the base address must be xx00-xx7f */
282 link->io.IOAddrLines = 16;
283 for (i = j = 0; j < 0x400; j += 0x10) {
284 if (multi && (j & 0x80)) continue;
285 link->io.BasePort1 = j ^ 0x300;
286 i = pcmcia_request_io(link, &link->io);
287 if (i == 0)
288 break;
289 }
290 if (i != 0)
291 goto failed;
292
293 ret = pcmcia_request_irq(link, el3_interrupt);
294 if (ret)
295 goto failed;
296
297 ret = pcmcia_request_configuration(link, &link->conf);
298 if (ret)
299 goto failed;
300
301 dev->irq = link->irq;
302 dev->base_addr = link->io.BasePort1;
303 ioaddr = dev->base_addr;
304 EL3WINDOW(0);
305
306 /* The 3c589 has an extra EEPROM for configuration info, including
307 the hardware address. The 3c562 puts the address in the CIS. */
308 len = pcmcia_get_tuple(link, 0x88, &buf);
309 if (buf && len >= 6) {
310 for (i = 0; i < 3; i++)
311 phys_addr[i] = htons(le16_to_cpu(buf[i*2]));
312 kfree(buf);
313 } else {
314 kfree(buf); /* 0 < len < 6 */
315 for (i = 0; i < 3; i++)
316 phys_addr[i] = htons(read_eeprom(ioaddr, i));
317 if (phys_addr[0] == htons(0x6060)) {
318 printk(KERN_ERR "3c589_cs: IO port conflict at 0x%03lx"
319 "-0x%03lx\n", dev->base_addr, dev->base_addr+15);
320 goto failed;
321 }
322 }
323
324 /* The address and resource configuration register aren't loaded from
325 the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version. */
326 outw(0x3f00, ioaddr + 8);
327 fifo = inl(ioaddr);
328
329 /* The if_port symbol can be set when the module is loaded */
330 if ((if_port >= 0) && (if_port <= 3))
331 dev->if_port = if_port;
332 else
333 printk(KERN_ERR "3c589_cs: invalid if_port requested\n");
334
335 SET_NETDEV_DEV(dev, &link->dev);
336
337 if (register_netdev(dev) != 0) {
338 printk(KERN_ERR "3c589_cs: register_netdev() failed\n");
339 goto failed;
340 }
341
342 netdev_info(dev, "3Com 3c%s, io %#3lx, irq %d, hw_addr %pM\n",
343 (multi ? "562" : "589"), dev->base_addr, dev->irq,
344 dev->dev_addr);
345 netdev_info(dev, " %dK FIFO split %s Rx:Tx, %s xcvr\n",
346 (fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3],
347 if_names[dev->if_port]);
348 return 0;
349
350 failed:
351 tc589_release(link);
352 return -ENODEV;
353 } /* tc589_config */
354
355 /*======================================================================
356
357 After a card is removed, tc589_release() will unregister the net
358 device, and release the PCMCIA configuration. If the device is
359 still open, this will be postponed until it is closed.
360
361 ======================================================================*/
362
363 static void tc589_release(struct pcmcia_device *link)
364 {
365 pcmcia_disable_device(link);
366 }
367
368 static int tc589_suspend(struct pcmcia_device *link)
369 {
370 struct net_device *dev = link->priv;
371
372 if (link->open)
373 netif_device_detach(dev);
374
375 return 0;
376 }
377
378 static int tc589_resume(struct pcmcia_device *link)
379 {
380 struct net_device *dev = link->priv;
381
382 if (link->open) {
383 tc589_reset(dev);
384 netif_device_attach(dev);
385 }
386
387 return 0;
388 }
389
390 /*====================================================================*/
391
392 /*
393 Use this for commands that may take time to finish
394 */
395 static void tc589_wait_for_completion(struct net_device *dev, int cmd)
396 {
397 int i = 100;
398 outw(cmd, dev->base_addr + EL3_CMD);
399 while (--i > 0)
400 if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break;
401 if (i == 0)
402 netdev_warn(dev, "command 0x%04x did not complete!\n", cmd);
403 }
404
405 /*
406 Read a word from the EEPROM using the regular EEPROM access register.
407 Assume that we are in register window zero.
408 */
409 static u16 read_eeprom(unsigned int ioaddr, int index)
410 {
411 int i;
412 outw(EEPROM_READ + index, ioaddr + 10);
413 /* Reading the eeprom takes 162 us */
414 for (i = 1620; i >= 0; i--)
415 if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
416 break;
417 return inw(ioaddr + 12);
418 }
419
420 /*
421 Set transceiver type, perhaps to something other than what the user
422 specified in dev->if_port.
423 */
424 static void tc589_set_xcvr(struct net_device *dev, int if_port)
425 {
426 struct el3_private *lp = netdev_priv(dev);
427 unsigned int ioaddr = dev->base_addr;
428
429 EL3WINDOW(0);
430 switch (if_port) {
431 case 0: case 1: outw(0, ioaddr + 6); break;
432 case 2: outw(3<<14, ioaddr + 6); break;
433 case 3: outw(1<<14, ioaddr + 6); break;
434 }
435 /* On PCMCIA, this just turns on the LED */
436 outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD);
437 /* 10baseT interface, enable link beat and jabber check. */
438 EL3WINDOW(4);
439 outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA);
440 EL3WINDOW(1);
441 if (if_port == 2)
442 lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000);
443 else
444 lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800);
445 }
446
447 static void dump_status(struct net_device *dev)
448 {
449 unsigned int ioaddr = dev->base_addr;
450 EL3WINDOW(1);
451 netdev_info(dev, " irq status %04x, rx status %04x, tx status %02x tx free %04x\n",
452 inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS),
453 inb(ioaddr+TX_STATUS), inw(ioaddr+TX_FREE));
454 EL3WINDOW(4);
455 netdev_info(dev, " diagnostics: fifo %04x net %04x ethernet %04x media %04x\n",
456 inw(ioaddr+0x04), inw(ioaddr+0x06), inw(ioaddr+0x08),
457 inw(ioaddr+0x0a));
458 EL3WINDOW(1);
459 }
460
461 /* Reset and restore all of the 3c589 registers. */
462 static void tc589_reset(struct net_device *dev)
463 {
464 unsigned int ioaddr = dev->base_addr;
465 int i;
466
467 EL3WINDOW(0);
468 outw(0x0001, ioaddr + 4); /* Activate board. */
469 outw(0x3f00, ioaddr + 8); /* Set the IRQ line. */
470
471 /* Set the station address in window 2. */
472 EL3WINDOW(2);
473 for (i = 0; i < 6; i++)
474 outb(dev->dev_addr[i], ioaddr + i);
475
476 tc589_set_xcvr(dev, dev->if_port);
477
478 /* Switch to the stats window, and clear all stats by reading. */
479 outw(StatsDisable, ioaddr + EL3_CMD);
480 EL3WINDOW(6);
481 for (i = 0; i < 9; i++)
482 inb(ioaddr+i);
483 inw(ioaddr + 10);
484 inw(ioaddr + 12);
485
486 /* Switch to register set 1 for normal use. */
487 EL3WINDOW(1);
488
489 set_rx_mode(dev);
490 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
491 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
492 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
493 /* Allow status bits to be seen. */
494 outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
495 /* Ack all pending events, and set active indicator mask. */
496 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
497 ioaddr + EL3_CMD);
498 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
499 | AdapterFailure, ioaddr + EL3_CMD);
500 }
501
502 static void netdev_get_drvinfo(struct net_device *dev,
503 struct ethtool_drvinfo *info)
504 {
505 strcpy(info->driver, DRV_NAME);
506 strcpy(info->version, DRV_VERSION);
507 sprintf(info->bus_info, "PCMCIA 0x%lx", dev->base_addr);
508 }
509
510 static const struct ethtool_ops netdev_ethtool_ops = {
511 .get_drvinfo = netdev_get_drvinfo,
512 };
513
514 static int el3_config(struct net_device *dev, struct ifmap *map)
515 {
516 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
517 if (map->port <= 3) {
518 dev->if_port = map->port;
519 netdev_info(dev, "switched to %s port\n", if_names[dev->if_port]);
520 tc589_set_xcvr(dev, dev->if_port);
521 } else
522 return -EINVAL;
523 }
524 return 0;
525 }
526
527 static int el3_open(struct net_device *dev)
528 {
529 struct el3_private *lp = netdev_priv(dev);
530 struct pcmcia_device *link = lp->p_dev;
531
532 if (!pcmcia_dev_present(link))
533 return -ENODEV;
534
535 link->open++;
536 netif_start_queue(dev);
537
538 tc589_reset(dev);
539 init_timer(&lp->media);
540 lp->media.function = &media_check;
541 lp->media.data = (unsigned long) dev;
542 lp->media.expires = jiffies + HZ;
543 add_timer(&lp->media);
544
545 dev_dbg(&link->dev, "%s: opened, status %4.4x.\n",
546 dev->name, inw(dev->base_addr + EL3_STATUS));
547
548 return 0;
549 }
550
551 static void el3_tx_timeout(struct net_device *dev)
552 {
553 unsigned int ioaddr = dev->base_addr;
554
555 netdev_warn(dev, "Transmit timed out!\n");
556 dump_status(dev);
557 dev->stats.tx_errors++;
558 dev->trans_start = jiffies; /* prevent tx timeout */
559 /* Issue TX_RESET and TX_START commands. */
560 tc589_wait_for_completion(dev, TxReset);
561 outw(TxEnable, ioaddr + EL3_CMD);
562 netif_wake_queue(dev);
563 }
564
565 static void pop_tx_status(struct net_device *dev)
566 {
567 unsigned int ioaddr = dev->base_addr;
568 int i;
569
570 /* Clear the Tx status stack. */
571 for (i = 32; i > 0; i--) {
572 u_char tx_status = inb(ioaddr + TX_STATUS);
573 if (!(tx_status & 0x84)) break;
574 /* reset transmitter on jabber error or underrun */
575 if (tx_status & 0x30)
576 tc589_wait_for_completion(dev, TxReset);
577 if (tx_status & 0x38) {
578 netdev_dbg(dev, "transmit error: status 0x%02x\n", tx_status);
579 outw(TxEnable, ioaddr + EL3_CMD);
580 dev->stats.tx_aborted_errors++;
581 }
582 outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
583 }
584 }
585
586 static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
587 struct net_device *dev)
588 {
589 unsigned int ioaddr = dev->base_addr;
590 struct el3_private *priv = netdev_priv(dev);
591 unsigned long flags;
592
593 netdev_dbg(dev, "el3_start_xmit(length = %ld) called, status %4.4x.\n",
594 (long)skb->len, inw(ioaddr + EL3_STATUS));
595
596 spin_lock_irqsave(&priv->lock, flags);
597
598 dev->stats.tx_bytes += skb->len;
599
600 /* Put out the doubleword header... */
601 outw(skb->len, ioaddr + TX_FIFO);
602 outw(0x00, ioaddr + TX_FIFO);
603 /* ... and the packet rounded to a doubleword. */
604 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
605
606 if (inw(ioaddr + TX_FREE) <= 1536) {
607 netif_stop_queue(dev);
608 /* Interrupt us when the FIFO has room for max-sized packet. */
609 outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
610 }
611
612 pop_tx_status(dev);
613 spin_unlock_irqrestore(&priv->lock, flags);
614 dev_kfree_skb(skb);
615
616 return NETDEV_TX_OK;
617 }
618
619 /* The EL3 interrupt handler. */
620 static irqreturn_t el3_interrupt(int irq, void *dev_id)
621 {
622 struct net_device *dev = (struct net_device *) dev_id;
623 struct el3_private *lp = netdev_priv(dev);
624 unsigned int ioaddr;
625 __u16 status;
626 int i = 0, handled = 1;
627
628 if (!netif_device_present(dev))
629 return IRQ_NONE;
630
631 ioaddr = dev->base_addr;
632
633 netdev_dbg(dev, "interrupt, status %4.4x.\n", inw(ioaddr + EL3_STATUS));
634
635 spin_lock(&lp->lock);
636 while ((status = inw(ioaddr + EL3_STATUS)) &
637 (IntLatch | RxComplete | StatsFull)) {
638 if ((status & 0xe000) != 0x2000) {
639 netdev_dbg(dev, "interrupt from dead card\n");
640 handled = 0;
641 break;
642 }
643 if (status & RxComplete)
644 el3_rx(dev);
645 if (status & TxAvailable) {
646 netdev_dbg(dev, " TX room bit was handled.\n");
647 /* There's room in the FIFO for a full-sized packet. */
648 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
649 netif_wake_queue(dev);
650 }
651 if (status & TxComplete)
652 pop_tx_status(dev);
653 if (status & (AdapterFailure | RxEarly | StatsFull)) {
654 /* Handle all uncommon interrupts. */
655 if (status & StatsFull) /* Empty statistics. */
656 update_stats(dev);
657 if (status & RxEarly) { /* Rx early is unused. */
658 el3_rx(dev);
659 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
660 }
661 if (status & AdapterFailure) {
662 u16 fifo_diag;
663 EL3WINDOW(4);
664 fifo_diag = inw(ioaddr + 4);
665 EL3WINDOW(1);
666 netdev_warn(dev, "adapter failure, FIFO diagnostic register %04x.\n",
667 fifo_diag);
668 if (fifo_diag & 0x0400) {
669 /* Tx overrun */
670 tc589_wait_for_completion(dev, TxReset);
671 outw(TxEnable, ioaddr + EL3_CMD);
672 }
673 if (fifo_diag & 0x2000) {
674 /* Rx underrun */
675 tc589_wait_for_completion(dev, RxReset);
676 set_rx_mode(dev);
677 outw(RxEnable, ioaddr + EL3_CMD);
678 }
679 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
680 }
681 }
682 if (++i > 10) {
683 netdev_err(dev, "infinite loop in interrupt, status %4.4x.\n",
684 status);
685 /* Clear all interrupts */
686 outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
687 break;
688 }
689 /* Acknowledge the IRQ. */
690 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
691 }
692 lp->last_irq = jiffies;
693 spin_unlock(&lp->lock);
694 netdev_dbg(dev, "exiting interrupt, status %4.4x.\n",
695 inw(ioaddr + EL3_STATUS));
696 return IRQ_RETVAL(handled);
697 }
698
699 static void media_check(unsigned long arg)
700 {
701 struct net_device *dev = (struct net_device *)(arg);
702 struct el3_private *lp = netdev_priv(dev);
703 unsigned int ioaddr = dev->base_addr;
704 u16 media, errs;
705 unsigned long flags;
706
707 if (!netif_device_present(dev)) goto reschedule;
708
709 /* Check for pending interrupt with expired latency timer: with
710 this, we can limp along even if the interrupt is blocked */
711 if ((inw(ioaddr + EL3_STATUS) & IntLatch) &&
712 (inb(ioaddr + EL3_TIMER) == 0xff)) {
713 if (!lp->fast_poll)
714 netdev_warn(dev, "interrupt(s) dropped!\n");
715
716 local_irq_save(flags);
717 el3_interrupt(dev->irq, dev);
718 local_irq_restore(flags);
719
720 lp->fast_poll = HZ;
721 }
722 if (lp->fast_poll) {
723 lp->fast_poll--;
724 lp->media.expires = jiffies + HZ/100;
725 add_timer(&lp->media);
726 return;
727 }
728
729 /* lp->lock guards the EL3 window. Window should always be 1 except
730 when the lock is held */
731 spin_lock_irqsave(&lp->lock, flags);
732 EL3WINDOW(4);
733 media = inw(ioaddr+WN4_MEDIA) & 0xc810;
734
735 /* Ignore collisions unless we've had no irq's recently */
736 if (time_before(jiffies, lp->last_irq + HZ)) {
737 media &= ~0x0010;
738 } else {
739 /* Try harder to detect carrier errors */
740 EL3WINDOW(6);
741 outw(StatsDisable, ioaddr + EL3_CMD);
742 errs = inb(ioaddr + 0);
743 outw(StatsEnable, ioaddr + EL3_CMD);
744 dev->stats.tx_carrier_errors += errs;
745 if (errs || (lp->media_status & 0x0010)) media |= 0x0010;
746 }
747
748 if (media != lp->media_status) {
749 if ((media & lp->media_status & 0x8000) &&
750 ((lp->media_status ^ media) & 0x0800))
751 netdev_info(dev, "%s link beat\n",
752 (lp->media_status & 0x0800 ? "lost" : "found"));
753 else if ((media & lp->media_status & 0x4000) &&
754 ((lp->media_status ^ media) & 0x0010))
755 netdev_info(dev, "coax cable %s\n",
756 (lp->media_status & 0x0010 ? "ok" : "problem"));
757 if (dev->if_port == 0) {
758 if (media & 0x8000) {
759 if (media & 0x0800)
760 netdev_info(dev, "flipped to 10baseT\n");
761 else
762 tc589_set_xcvr(dev, 2);
763 } else if (media & 0x4000) {
764 if (media & 0x0010)
765 tc589_set_xcvr(dev, 1);
766 else
767 netdev_info(dev, "flipped to 10base2\n");
768 }
769 }
770 lp->media_status = media;
771 }
772
773 EL3WINDOW(1);
774 spin_unlock_irqrestore(&lp->lock, flags);
775
776 reschedule:
777 lp->media.expires = jiffies + HZ;
778 add_timer(&lp->media);
779 }
780
781 static struct net_device_stats *el3_get_stats(struct net_device *dev)
782 {
783 struct el3_private *lp = netdev_priv(dev);
784 unsigned long flags;
785 struct pcmcia_device *link = lp->p_dev;
786
787 if (pcmcia_dev_present(link)) {
788 spin_lock_irqsave(&lp->lock, flags);
789 update_stats(dev);
790 spin_unlock_irqrestore(&lp->lock, flags);
791 }
792 return &dev->stats;
793 }
794
795 /*
796 Update statistics. We change to register window 6, so this should be run
797 single-threaded if the device is active. This is expected to be a rare
798 operation, and it's simpler for the rest of the driver to assume that
799 window 1 is always valid rather than use a special window-state variable.
800
801 Caller must hold the lock for this
802 */
803 static void update_stats(struct net_device *dev)
804 {
805 unsigned int ioaddr = dev->base_addr;
806
807 netdev_dbg(dev, "updating the statistics.\n");
808 /* Turn off statistics updates while reading. */
809 outw(StatsDisable, ioaddr + EL3_CMD);
810 /* Switch to the stats window, and read everything. */
811 EL3WINDOW(6);
812 dev->stats.tx_carrier_errors += inb(ioaddr + 0);
813 dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
814 /* Multiple collisions. */ inb(ioaddr + 2);
815 dev->stats.collisions += inb(ioaddr + 3);
816 dev->stats.tx_window_errors += inb(ioaddr + 4);
817 dev->stats.rx_fifo_errors += inb(ioaddr + 5);
818 dev->stats.tx_packets += inb(ioaddr + 6);
819 /* Rx packets */ inb(ioaddr + 7);
820 /* Tx deferrals */ inb(ioaddr + 8);
821 /* Rx octets */ inw(ioaddr + 10);
822 /* Tx octets */ inw(ioaddr + 12);
823
824 /* Back to window 1, and turn statistics back on. */
825 EL3WINDOW(1);
826 outw(StatsEnable, ioaddr + EL3_CMD);
827 }
828
829 static int el3_rx(struct net_device *dev)
830 {
831 unsigned int ioaddr = dev->base_addr;
832 int worklimit = 32;
833 short rx_status;
834
835 netdev_dbg(dev, "in rx_packet(), status %4.4x, rx_status %4.4x.\n",
836 inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
837 while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
838 worklimit > 0) {
839 worklimit--;
840 if (rx_status & 0x4000) { /* Error, update stats. */
841 short error = rx_status & 0x3800;
842 dev->stats.rx_errors++;
843 switch (error) {
844 case 0x0000: dev->stats.rx_over_errors++; break;
845 case 0x0800: dev->stats.rx_length_errors++; break;
846 case 0x1000: dev->stats.rx_frame_errors++; break;
847 case 0x1800: dev->stats.rx_length_errors++; break;
848 case 0x2000: dev->stats.rx_frame_errors++; break;
849 case 0x2800: dev->stats.rx_crc_errors++; break;
850 }
851 } else {
852 short pkt_len = rx_status & 0x7ff;
853 struct sk_buff *skb;
854
855 skb = dev_alloc_skb(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
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
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
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 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 .drv = {
959 .name = "3c589_cs",
960 },
961 .probe = tc589_probe,
962 .remove = tc589_detach,
963 .id_table = tc589_ids,
964 .suspend = tc589_suspend,
965 .resume = tc589_resume,
966 };
967
968 static int __init init_tc589(void)
969 {
970 return pcmcia_register_driver(&tc589_driver);
971 }
972
973 static void __exit exit_tc589(void)
974 {
975 pcmcia_unregister_driver(&tc589_driver);
976 }
977
978 module_init(init_tc589);
979 module_exit(exit_tc589);
Linux kernel - Deliverables
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