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drivers/net/pcmcia: Use static const char * const where possible
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / pcmcia / 3c589_cs.c
blob35562a395770044b254d10b1fdbe8dc834b93445
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 pr_fmt(fmt) KBUILD_MODNAME ": " fmt
23
24 #define DRV_NAME "3c589_cs"
25 #define DRV_VERSION "1.162-ac"
26
27 #include <linux/module.h>
28 #include <linux/init.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
46 #include <pcmcia/cs.h>
47 #include <pcmcia/cistpl.h>
48 #include <pcmcia/cisreg.h>
49 #include <pcmcia/ciscode.h>
50 #include <pcmcia/ds.h>
51
52 #include <asm/uaccess.h>
53 #include <asm/io.h>
54 #include <asm/system.h>
55
56 /* To minimize the size of the driver source I only define operating
57 constants if they are used several times. You'll need the manual
58 if you want to understand driver details. */
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 enum c509cmd {
73 TotalReset = 0<<11,
74 SelectWindow = 1<<11,
75 StartCoax = 2<<11,
76 RxDisable = 3<<11,
77 RxEnable = 4<<11,
78 RxReset = 5<<11,
79 RxDiscard = 8<<11,
80 TxEnable = 9<<11,
81 TxDisable = 10<<11,
82 TxReset = 11<<11,
83 FakeIntr = 12<<11,
84 AckIntr = 13<<11,
85 SetIntrEnb = 14<<11,
86 SetStatusEnb = 15<<11,
87 SetRxFilter = 16<<11,
88 SetRxThreshold = 17<<11,
89 SetTxThreshold = 18<<11,
90 SetTxStart = 19<<11,
91 StatsEnable = 21<<11,
92 StatsDisable = 22<<11,
93 StopCoax = 23<<11
94 };
95
96 enum c509status {
97 IntLatch = 0x0001,
98 AdapterFailure = 0x0002,
99 TxComplete = 0x0004,
100 TxAvailable = 0x0008,
101 RxComplete = 0x0010,
102 RxEarly = 0x0020,
103 IntReq = 0x0040,
104 StatsFull = 0x0080,
105 CmdBusy = 0x1000
106 };
107
108 /* The SetRxFilter command accepts the following classes: */
109 enum RxFilter {
110 RxStation = 1,
111 RxMulticast = 2,
112 RxBroadcast = 4,
113 RxProm = 8
114 };
115
116 /* Register window 1 offsets, the window used in normal operation. */
117 #define TX_FIFO 0x00
118 #define RX_FIFO 0x00
119 #define RX_STATUS 0x08
120 #define TX_STATUS 0x0B
121 #define TX_FREE 0x0C /* Remaining free bytes in Tx buffer. */
122
123 #define WN0_IRQ 0x08 /* Window 0: Set IRQ line in bits 12-15. */
124 #define WN4_MEDIA 0x0A /* Window 4: Various transcvr/media bits. */
125 #define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */
126 #define MEDIA_LED 0x0001 /* Enable link light on 3C589E cards. */
127
128 /* Time in jiffies before concluding Tx hung */
129 #define TX_TIMEOUT ((400*HZ)/1000)
130
131 struct el3_private {
132 struct pcmcia_device *p_dev;
133 /* For transceiver monitoring */
134 struct timer_list media;
135 u16 media_status;
136 u16 fast_poll;
137 unsigned long last_irq;
138 spinlock_t lock;
139 };
140
141 static const char *if_names[] = { "auto", "10baseT", "10base2", "AUI" };
142
143 /*====================================================================*/
144
145 /* Module parameters */
146
147 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
148 MODULE_DESCRIPTION("3Com 3c589 series PCMCIA ethernet driver");
149 MODULE_LICENSE("GPL");
150
151 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
152
153 /* Special hook for setting if_port when module is loaded */
154 INT_MODULE_PARM(if_port, 0);
155
156
157 /*====================================================================*/
158
159 static int tc589_config(struct pcmcia_device *link);
160 static void tc589_release(struct pcmcia_device *link);
161
162 static u16 read_eeprom(unsigned int ioaddr, int index);
163 static void tc589_reset(struct net_device *dev);
164 static void media_check(unsigned long arg);
165 static int el3_config(struct net_device *dev, struct ifmap *map);
166 static int el3_open(struct net_device *dev);
167 static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
168 struct net_device *dev);
169 static irqreturn_t el3_interrupt(int irq, void *dev_id);
170 static void update_stats(struct net_device *dev);
171 static struct net_device_stats *el3_get_stats(struct net_device *dev);
172 static int el3_rx(struct net_device *dev);
173 static int el3_close(struct net_device *dev);
174 static void el3_tx_timeout(struct net_device *dev);
175 static void set_rx_mode(struct net_device *dev);
176 static void set_multicast_list(struct net_device *dev);
177 static const struct ethtool_ops netdev_ethtool_ops;
178
179 static void tc589_detach(struct pcmcia_device *p_dev);
180
181 /*======================================================================
182
183 tc589_attach() creates an "instance" of the driver, allocating
184 local data structures for one device. The device is registered
185 with Card Services.
186
187 ======================================================================*/
188
189 static const struct net_device_ops el3_netdev_ops = {
190 .ndo_open = el3_open,
191 .ndo_stop = el3_close,
192 .ndo_start_xmit = el3_start_xmit,
193 .ndo_tx_timeout = el3_tx_timeout,
194 .ndo_set_config = el3_config,
195 .ndo_get_stats = el3_get_stats,
196 .ndo_set_multicast_list = set_multicast_list,
197 .ndo_change_mtu = eth_change_mtu,
198 .ndo_set_mac_address = eth_mac_addr,
199 .ndo_validate_addr = eth_validate_addr,
200 };
201
202 static int tc589_probe(struct pcmcia_device *link)
203 {
204 struct el3_private *lp;
205 struct net_device *dev;
206
207 dev_dbg(&link->dev, "3c589_attach()\n");
208
209 /* Create new ethernet device */
210 dev = alloc_etherdev(sizeof(struct el3_private));
211 if (!dev)
212 return -ENOMEM;
213 lp = netdev_priv(dev);
214 link->priv = dev;
215 lp->p_dev = link;
216
217 spin_lock_init(&lp->lock);
218 link->resource[0]->end = 16;
219 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_16;
220
221 link->conf.Attributes = CONF_ENABLE_IRQ;
222 link->conf.IntType = INT_MEMORY_AND_IO;
223 link->conf.ConfigIndex = 1;
224
225 dev->netdev_ops = &el3_netdev_ops;
226 dev->watchdog_timeo = TX_TIMEOUT;
227
228 SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
229
230 return tc589_config(link);
231 } /* tc589_attach */
232
233 /*======================================================================
234
235 This deletes a driver "instance". The device is de-registered
236 with Card Services. If it has been released, all local data
237 structures are freed. Otherwise, the structures will be freed
238 when the device is released.
239
240 ======================================================================*/
241
242 static void tc589_detach(struct pcmcia_device *link)
243 {
244 struct net_device *dev = link->priv;
245
246 dev_dbg(&link->dev, "3c589_detach\n");
247
248 unregister_netdev(dev);
249
250 tc589_release(link);
251
252 free_netdev(dev);
253 } /* tc589_detach */
254
255 /*======================================================================
256
257 tc589_config() is scheduled to run after a CARD_INSERTION event
258 is received, to configure the PCMCIA socket, and to make the
259 ethernet device available to the system.
260
261 ======================================================================*/
262
263 static int tc589_config(struct pcmcia_device *link)
264 {
265 struct net_device *dev = link->priv;
266 __be16 *phys_addr;
267 int ret, i, j, multi = 0, fifo;
268 unsigned int ioaddr;
269 static const char * const ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
270 u8 *buf;
271 size_t len;
272
273 dev_dbg(&link->dev, "3c589_config\n");
274
275 phys_addr = (__be16 *)dev->dev_addr;
276 /* Is this a 3c562? */
277 if (link->manf_id != MANFID_3COM)
278 dev_info(&link->dev, "hmmm, is this really a 3Com card??\n");
279 multi = (link->card_id == PRODID_3COM_3C562);
280
281 link->io_lines = 16;
282
283 /* For the 3c562, the base address must be xx00-xx7f */
284 for (i = j = 0; j < 0x400; j += 0x10) {
285 if (multi && (j & 0x80)) continue;
286 link->resource[0]->start = j ^ 0x300;
287 i = pcmcia_request_io(link);
288 if (i == 0)
289 break;
290 }
291 if (i != 0)
292 goto failed;
293
294 ret = pcmcia_request_irq(link, el3_interrupt);
295 if (ret)
296 goto failed;
297
298 ret = pcmcia_request_configuration(link, &link->conf);
299 if (ret)
300 goto failed;
301
302 dev->irq = link->irq;
303 dev->base_addr = link->resource[0]->start;
304 ioaddr = dev->base_addr;
305 EL3WINDOW(0);
306
307 /* The 3c589 has an extra EEPROM for configuration info, including
308 the hardware address. The 3c562 puts the address in the CIS. */
309 len = pcmcia_get_tuple(link, 0x88, &buf);
310 if (buf && len >= 6) {
311 for (i = 0; i < 3; i++)
312 phys_addr[i] = htons(le16_to_cpu(buf[i*2]));
313 kfree(buf);
314 } else {
315 kfree(buf); /* 0 < len < 6 */
316 for (i = 0; i < 3; i++)
317 phys_addr[i] = htons(read_eeprom(ioaddr, i));
318 if (phys_addr[0] == htons(0x6060)) {
319 dev_err(&link->dev, "IO port conflict at 0x%03lx-0x%03lx\n",
320 dev->base_addr, dev->base_addr+15);
321 goto failed;
322 }
323 }
324
325 /* The address and resource configuration register aren't loaded from
326 the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version. */
327 outw(0x3f00, ioaddr + 8);
328 fifo = inl(ioaddr);
329
330 /* The if_port symbol can be set when the module is loaded */
331 if ((if_port >= 0) && (if_port <= 3))
332 dev->if_port = if_port;
333 else
334 dev_err(&link->dev, "invalid if_port requested\n");
335
336 SET_NETDEV_DEV(dev, &link->dev);
337
338 if (register_netdev(dev) != 0) {
339 dev_err(&link->dev, "register_netdev() failed\n");
340 goto failed;
341 }
342
343 netdev_info(dev, "3Com 3c%s, io %#3lx, irq %d, hw_addr %pM\n",
344 (multi ? "562" : "589"), dev->base_addr, dev->irq,
345 dev->dev_addr);
346 netdev_info(dev, " %dK FIFO split %s Rx:Tx, %s xcvr\n",
347 (fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3],
348 if_names[dev->if_port]);
349 return 0;
350
351 failed:
352 tc589_release(link);
353 return -ENODEV;
354 } /* tc589_config */
355
356 /*======================================================================
357
358 After a card is removed, tc589_release() will unregister the net
359 device, and release the PCMCIA configuration. If the device is
360 still open, this will be postponed until it is closed.
361
362 ======================================================================*/
363
364 static void tc589_release(struct pcmcia_device *link)
365 {
366 pcmcia_disable_device(link);
367 }
368
369 static int tc589_suspend(struct pcmcia_device *link)
370 {
371 struct net_device *dev = link->priv;
372
373 if (link->open)
374 netif_device_detach(dev);
375
376 return 0;
377 }
378
379 static int tc589_resume(struct pcmcia_device *link)
380 {
381 struct net_device *dev = link->priv;
382
383 if (link->open) {
384 tc589_reset(dev);
385 netif_device_attach(dev);
386 }
387
388 return 0;
389 }
390
391 /*====================================================================*/
392
393 /*
394 Use this for commands that may take time to finish
395 */
396 static void tc589_wait_for_completion(struct net_device *dev, int cmd)
397 {
398 int i = 100;
399 outw(cmd, dev->base_addr + EL3_CMD);
400 while (--i > 0)
401 if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break;
402 if (i == 0)
403 netdev_warn(dev, "command 0x%04x did not complete!\n", cmd);
404 }
405
406 /*
407 Read a word from the EEPROM using the regular EEPROM access register.
408 Assume that we are in register window zero.
409 */
410 static u16 read_eeprom(unsigned int ioaddr, int index)
411 {
412 int i;
413 outw(EEPROM_READ + index, ioaddr + 10);
414 /* Reading the eeprom takes 162 us */
415 for (i = 1620; i >= 0; i--)
416 if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
417 break;
418 return inw(ioaddr + 12);
419 }
420
421 /*
422 Set transceiver type, perhaps to something other than what the user
423 specified in dev->if_port.
424 */
425 static void tc589_set_xcvr(struct net_device *dev, int if_port)
426 {
427 struct el3_private *lp = netdev_priv(dev);
428 unsigned int ioaddr = dev->base_addr;
429
430 EL3WINDOW(0);
431 switch (if_port) {
432 case 0: case 1: outw(0, ioaddr + 6); break;
433 case 2: outw(3<<14, ioaddr + 6); break;
434 case 3: outw(1<<14, ioaddr + 6); break;
435 }
436 /* On PCMCIA, this just turns on the LED */
437 outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD);
438 /* 10baseT interface, enable link beat and jabber check. */
439 EL3WINDOW(4);
440 outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA);
441 EL3WINDOW(1);
442 if (if_port == 2)
443 lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000);
444 else
445 lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800);
446 }
447
448 static void dump_status(struct net_device *dev)
449 {
450 unsigned int ioaddr = dev->base_addr;
451 EL3WINDOW(1);
452 netdev_info(dev, " irq status %04x, rx status %04x, tx status %02x tx free %04x\n",
453 inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS),
454 inb(ioaddr+TX_STATUS), inw(ioaddr+TX_FREE));
455 EL3WINDOW(4);
456 netdev_info(dev, " diagnostics: fifo %04x net %04x ethernet %04x media %04x\n",
457 inw(ioaddr+0x04), inw(ioaddr+0x06), inw(ioaddr+0x08),
458 inw(ioaddr+0x0a));
459 EL3WINDOW(1);
460 }
461
462 /* Reset and restore all of the 3c589 registers. */
463 static void tc589_reset(struct net_device *dev)
464 {
465 unsigned int ioaddr = dev->base_addr;
466 int i;
467
468 EL3WINDOW(0);
469 outw(0x0001, ioaddr + 4); /* Activate board. */
470 outw(0x3f00, ioaddr + 8); /* Set the IRQ line. */
471
472 /* Set the station address in window 2. */
473 EL3WINDOW(2);
474 for (i = 0; i < 6; i++)
475 outb(dev->dev_addr[i], ioaddr + i);
476
477 tc589_set_xcvr(dev, dev->if_port);
478
479 /* Switch to the stats window, and clear all stats by reading. */
480 outw(StatsDisable, ioaddr + EL3_CMD);
481 EL3WINDOW(6);
482 for (i = 0; i < 9; i++)
483 inb(ioaddr+i);
484 inw(ioaddr + 10);
485 inw(ioaddr + 12);
486
487 /* Switch to register set 1 for normal use. */
488 EL3WINDOW(1);
489
490 set_rx_mode(dev);
491 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
492 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
493 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
494 /* Allow status bits to be seen. */
495 outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
496 /* Ack all pending events, and set active indicator mask. */
497 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
498 ioaddr + EL3_CMD);
499 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
500 | AdapterFailure, ioaddr + EL3_CMD);
501 }
502
503 static void netdev_get_drvinfo(struct net_device *dev,
504 struct ethtool_drvinfo *info)
505 {
506 strcpy(info->driver, DRV_NAME);
507 strcpy(info->version, DRV_VERSION);
508 sprintf(info->bus_info, "PCMCIA 0x%lx", dev->base_addr);
509 }
510
511 static const struct ethtool_ops netdev_ethtool_ops = {
512 .get_drvinfo = netdev_get_drvinfo,
513 };
514
515 static int el3_config(struct net_device *dev, struct ifmap *map)
516 {
517 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
518 if (map->port <= 3) {
519 dev->if_port = map->port;
520 netdev_info(dev, "switched to %s port\n", if_names[dev->if_port]);
521 tc589_set_xcvr(dev, dev->if_port);
522 } else
523 return -EINVAL;
524 }
525 return 0;
526 }
527
528 static int el3_open(struct net_device *dev)
529 {
530 struct el3_private *lp = netdev_priv(dev);
531 struct pcmcia_device *link = lp->p_dev;
532
533 if (!pcmcia_dev_present(link))
534 return -ENODEV;
535
536 link->open++;
537 netif_start_queue(dev);
538
539 tc589_reset(dev);
540 init_timer(&lp->media);
541 lp->media.function = media_check;
542 lp->media.data = (unsigned long) dev;
543 lp->media.expires = jiffies + HZ;
544 add_timer(&lp->media);
545
546 dev_dbg(&link->dev, "%s: opened, status %4.4x.\n",
547 dev->name, inw(dev->base_addr + EL3_STATUS));
548
549 return 0;
550 }
551
552 static void el3_tx_timeout(struct net_device *dev)
553 {
554 unsigned int ioaddr = dev->base_addr;
555
556 netdev_warn(dev, "Transmit timed out!\n");
557 dump_status(dev);
558 dev->stats.tx_errors++;
559 dev->trans_start = jiffies; /* prevent tx timeout */
560 /* Issue TX_RESET and TX_START commands. */
561 tc589_wait_for_completion(dev, TxReset);
562 outw(TxEnable, ioaddr + EL3_CMD);
563 netif_wake_queue(dev);
564 }
565
566 static void pop_tx_status(struct net_device *dev)
567 {
568 unsigned int ioaddr = dev->base_addr;
569 int i;
570
571 /* Clear the Tx status stack. */
572 for (i = 32; i > 0; i--) {
573 u_char tx_status = inb(ioaddr + TX_STATUS);
574 if (!(tx_status & 0x84)) break;
575 /* reset transmitter on jabber error or underrun */
576 if (tx_status & 0x30)
577 tc589_wait_for_completion(dev, TxReset);
578 if (tx_status & 0x38) {
579 netdev_dbg(dev, "transmit error: status 0x%02x\n", tx_status);
580 outw(TxEnable, ioaddr + EL3_CMD);
581 dev->stats.tx_aborted_errors++;
582 }
583 outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
584 }
585 }
586
587 static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
588 struct net_device *dev)
589 {
590 unsigned int ioaddr = dev->base_addr;
591 struct el3_private *priv = netdev_priv(dev);
592 unsigned long flags;
593
594 netdev_dbg(dev, "el3_start_xmit(length = %ld) called, status %4.4x.\n",
595 (long)skb->len, inw(ioaddr + EL3_STATUS));
596
597 spin_lock_irqsave(&priv->lock, flags);
598
599 dev->stats.tx_bytes += skb->len;
600
601 /* Put out the doubleword header... */
602 outw(skb->len, ioaddr + TX_FIFO);
603 outw(0x00, ioaddr + TX_FIFO);
604 /* ... and the packet rounded to a doubleword. */
605 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
606
607 if (inw(ioaddr + TX_FREE) <= 1536) {
608 netif_stop_queue(dev);
609 /* Interrupt us when the FIFO has room for max-sized packet. */
610 outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
611 }
612
613 pop_tx_status(dev);
614 spin_unlock_irqrestore(&priv->lock, flags);
615 dev_kfree_skb(skb);
616
617 return NETDEV_TX_OK;
618 }
619
620 /* The EL3 interrupt handler. */
621 static irqreturn_t el3_interrupt(int irq, void *dev_id)
622 {
623 struct net_device *dev = (struct net_device *) dev_id;
624 struct el3_private *lp = netdev_priv(dev);
625 unsigned int ioaddr;
626 __u16 status;
627 int i = 0, handled = 1;
628
629 if (!netif_device_present(dev))
630 return IRQ_NONE;
631
632 ioaddr = dev->base_addr;
633
634 netdev_dbg(dev, "interrupt, status %4.4x.\n", inw(ioaddr + EL3_STATUS));
635
636 spin_lock(&lp->lock);
637 while ((status = inw(ioaddr + EL3_STATUS)) &
638 (IntLatch | RxComplete | StatsFull)) {
639 if ((status & 0xe000) != 0x2000) {
640 netdev_dbg(dev, "interrupt from dead card\n");
641 handled = 0;
642 break;
643 }
644 if (status & RxComplete)
645 el3_rx(dev);
646 if (status & TxAvailable) {
647 netdev_dbg(dev, " TX room bit was handled.\n");
648 /* There's room in the FIFO for a full-sized packet. */
649 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
650 netif_wake_queue(dev);
651 }
652 if (status & TxComplete)
653 pop_tx_status(dev);
654 if (status & (AdapterFailure | RxEarly | StatsFull)) {
655 /* Handle all uncommon interrupts. */
656 if (status & StatsFull) /* Empty statistics. */
657 update_stats(dev);
658 if (status & RxEarly) { /* Rx early is unused. */
659 el3_rx(dev);
660 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
661 }
662 if (status & AdapterFailure) {
663 u16 fifo_diag;
664 EL3WINDOW(4);
665 fifo_diag = inw(ioaddr + 4);
666 EL3WINDOW(1);
667 netdev_warn(dev, "adapter failure, FIFO diagnostic register %04x.\n",
668 fifo_diag);
669 if (fifo_diag & 0x0400) {
670 /* Tx overrun */
671 tc589_wait_for_completion(dev, TxReset);
672 outw(TxEnable, ioaddr + EL3_CMD);
673 }
674 if (fifo_diag & 0x2000) {
675 /* Rx underrun */
676 tc589_wait_for_completion(dev, RxReset);
677 set_rx_mode(dev);
678 outw(RxEnable, ioaddr + EL3_CMD);
679 }
680 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
681 }
682 }
683 if (++i > 10) {
684 netdev_err(dev, "infinite loop in interrupt, status %4.4x.\n",
685 status);
686 /* Clear all interrupts */
687 outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
688 break;
689 }
690 /* Acknowledge the IRQ. */
691 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
692 }
693 lp->last_irq = jiffies;
694 spin_unlock(&lp->lock);
695 netdev_dbg(dev, "exiting interrupt, status %4.4x.\n",
696 inw(ioaddr + EL3_STATUS));
697 return IRQ_RETVAL(handled);
698 }
699
700 static void media_check(unsigned long arg)
701 {
702 struct net_device *dev = (struct net_device *)(arg);
703 struct el3_private *lp = netdev_priv(dev);
704 unsigned int ioaddr = dev->base_addr;
705 u16 media, errs;
706 unsigned long flags;
707
708 if (!netif_device_present(dev)) goto reschedule;
709
710 /* Check for pending interrupt with expired latency timer: with
711 this, we can limp along even if the interrupt is blocked */
712 if ((inw(ioaddr + EL3_STATUS) & IntLatch) &&
713 (inb(ioaddr + EL3_TIMER) == 0xff)) {
714 if (!lp->fast_poll)
715 netdev_warn(dev, "interrupt(s) dropped!\n");
716
717 local_irq_save(flags);
718 el3_interrupt(dev->irq, dev);
719 local_irq_restore(flags);
720
721 lp->fast_poll = HZ;
722 }
723 if (lp->fast_poll) {
724 lp->fast_poll--;
725 lp->media.expires = jiffies + HZ/100;
726 add_timer(&lp->media);
727 return;
728 }
729
730 /* lp->lock guards the EL3 window. Window should always be 1 except
731 when the lock is held */
732 spin_lock_irqsave(&lp->lock, flags);
733 EL3WINDOW(4);
734 media = inw(ioaddr+WN4_MEDIA) & 0xc810;
735
736 /* Ignore collisions unless we've had no irq's recently */
737 if (time_before(jiffies, lp->last_irq + HZ)) {
738 media &= ~0x0010;
739 } else {
740 /* Try harder to detect carrier errors */
741 EL3WINDOW(6);
742 outw(StatsDisable, ioaddr + EL3_CMD);
743 errs = inb(ioaddr + 0);
744 outw(StatsEnable, ioaddr + EL3_CMD);
745 dev->stats.tx_carrier_errors += errs;
746 if (errs || (lp->media_status & 0x0010)) media |= 0x0010;
747 }
748
749 if (media != lp->media_status) {
750 if ((media & lp->media_status & 0x8000) &&
751 ((lp->media_status ^ media) & 0x0800))
752 netdev_info(dev, "%s link beat\n",
753 (lp->media_status & 0x0800 ? "lost" : "found"));
754 else if ((media & lp->media_status & 0x4000) &&
755 ((lp->media_status ^ media) & 0x0010))
756 netdev_info(dev, "coax cable %s\n",
757 (lp->media_status & 0x0010 ? "ok" : "problem"));
758 if (dev->if_port == 0) {
759 if (media & 0x8000) {
760 if (media & 0x0800)
761 netdev_info(dev, "flipped to 10baseT\n");
762 else
763 tc589_set_xcvr(dev, 2);
764 } else if (media & 0x4000) {
765 if (media & 0x0010)
766 tc589_set_xcvr(dev, 1);
767 else
768 netdev_info(dev, "flipped to 10base2\n");
769 }
770 }
771 lp->media_status = media;
772 }
773
774 EL3WINDOW(1);
775 spin_unlock_irqrestore(&lp->lock, flags);
776
777 reschedule:
778 lp->media.expires = jiffies + HZ;
779 add_timer(&lp->media);
780 }
781
782 static struct net_device_stats *el3_get_stats(struct net_device *dev)
783 {
784 struct el3_private *lp = netdev_priv(dev);
785 unsigned long flags;
786 struct pcmcia_device *link = lp->p_dev;
787
788 if (pcmcia_dev_present(link)) {
789 spin_lock_irqsave(&lp->lock, flags);
790 update_stats(dev);
791 spin_unlock_irqrestore(&lp->lock, flags);
792 }
793 return &dev->stats;
794 }
795
796 /*
797 Update statistics. We change to register window 6, so this should be run
798 single-threaded if the device is active. This is expected to be a rare
799 operation, and it's simpler for the rest of the driver to assume that
800 window 1 is always valid rather than use a special window-state variable.
801
802 Caller must hold the lock for this
803 */
804 static void update_stats(struct net_device *dev)
805 {
806 unsigned int ioaddr = dev->base_addr;
807
808 netdev_dbg(dev, "updating the statistics.\n");
809 /* Turn off statistics updates while reading. */
810 outw(StatsDisable, ioaddr + EL3_CMD);
811 /* Switch to the stats window, and read everything. */
812 EL3WINDOW(6);
813 dev->stats.tx_carrier_errors += inb(ioaddr + 0);
814 dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
815 /* Multiple collisions. */ inb(ioaddr + 2);
816 dev->stats.collisions += inb(ioaddr + 3);
817 dev->stats.tx_window_errors += inb(ioaddr + 4);
818 dev->stats.rx_fifo_errors += inb(ioaddr + 5);
819 dev->stats.tx_packets += inb(ioaddr + 6);
820 /* Rx packets */ inb(ioaddr + 7);
821 /* Tx deferrals */ inb(ioaddr + 8);
822 /* Rx octets */ inw(ioaddr + 10);
823 /* Tx octets */ inw(ioaddr + 12);
824
825 /* Back to window 1, and turn statistics back on. */
826 EL3WINDOW(1);
827 outw(StatsEnable, ioaddr + EL3_CMD);
828 }
829
830 static int el3_rx(struct net_device *dev)
831 {
832 unsigned int ioaddr = dev->base_addr;
833 int worklimit = 32;
834 short rx_status;
835
836 netdev_dbg(dev, "in rx_packet(), status %4.4x, rx_status %4.4x.\n",
837 inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
838 while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
839 worklimit > 0) {
840 worklimit--;
841 if (rx_status & 0x4000) { /* Error, update stats. */
842 short error = rx_status & 0x3800;
843 dev->stats.rx_errors++;
844 switch (error) {
845 case 0x0000: dev->stats.rx_over_errors++; break;
846 case 0x0800: dev->stats.rx_length_errors++; break;
847 case 0x1000: dev->stats.rx_frame_errors++; break;
848 case 0x1800: dev->stats.rx_length_errors++; break;
849 case 0x2000: dev->stats.rx_frame_errors++; break;
850 case 0x2800: dev->stats.rx_crc_errors++; break;
851 }
852 } else {
853 short pkt_len = rx_status & 0x7ff;
854 struct sk_buff *skb;
855
856 skb = dev_alloc_skb(pkt_len+5);
857
858 netdev_dbg(dev, " Receiving packet size %d status %4.4x.\n",
859 pkt_len, rx_status);
860 if (skb != NULL) {
861 skb_reserve(skb, 2);
862 insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
863 (pkt_len+3)>>2);
864 skb->protocol = eth_type_trans(skb, dev);
865 netif_rx(skb);
866 dev->stats.rx_packets++;
867 dev->stats.rx_bytes += pkt_len;
868 } else {
869 netdev_dbg(dev, "couldn't allocate a sk_buff of size %d.\n",
870 pkt_len);
871 dev->stats.rx_dropped++;
872 }
873 }
874 /* Pop the top of the Rx FIFO */
875 tc589_wait_for_completion(dev, RxDiscard);
876 }
877 if (worklimit == 0)
878 netdev_warn(dev, "too much work in el3_rx!\n");
879 return 0;
880 }
881
882 static void set_rx_mode(struct net_device *dev)
883 {
884 unsigned int ioaddr = dev->base_addr;
885 u16 opts = SetRxFilter | RxStation | RxBroadcast;
886
887 if (dev->flags & IFF_PROMISC)
888 opts |= RxMulticast | RxProm;
889 else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI))
890 opts |= RxMulticast;
891 outw(opts, ioaddr + EL3_CMD);
892 }
893
894 static void set_multicast_list(struct net_device *dev)
895 {
896 struct el3_private *priv = netdev_priv(dev);
897 unsigned long flags;
898
899 spin_lock_irqsave(&priv->lock, flags);
900 set_rx_mode(dev);
901 spin_unlock_irqrestore(&priv->lock, flags);
902 }
903
904 static int el3_close(struct net_device *dev)
905 {
906 struct el3_private *lp = netdev_priv(dev);
907 struct pcmcia_device *link = lp->p_dev;
908 unsigned int ioaddr = dev->base_addr;
909
910 dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name);
911
912 if (pcmcia_dev_present(link)) {
913 /* Turn off statistics ASAP. We update dev->stats below. */
914 outw(StatsDisable, ioaddr + EL3_CMD);
915
916 /* Disable the receiver and transmitter. */
917 outw(RxDisable, ioaddr + EL3_CMD);
918 outw(TxDisable, ioaddr + EL3_CMD);
919
920 if (dev->if_port == 2)
921 /* Turn off thinnet power. Green! */
922 outw(StopCoax, ioaddr + EL3_CMD);
923 else if (dev->if_port == 1) {
924 /* Disable link beat and jabber */
925 EL3WINDOW(4);
926 outw(0, ioaddr + WN4_MEDIA);
927 }
928
929 /* Switching back to window 0 disables the IRQ. */
930 EL3WINDOW(0);
931 /* But we explicitly zero the IRQ line select anyway. */
932 outw(0x0f00, ioaddr + WN0_IRQ);
933
934 /* Check if the card still exists */
935 if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000)
936 update_stats(dev);
937 }
938
939 link->open--;
940 netif_stop_queue(dev);
941 del_timer_sync(&lp->media);
942
943 return 0;
944 }
945
946 static struct pcmcia_device_id tc589_ids[] = {
947 PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562),
948 PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77),
949 PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589),
950 PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202),
951 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "cis/3CXEM556.cis"),
952 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "cis/3CXEM556.cis"),
953 PCMCIA_DEVICE_NULL,
954 };
955 MODULE_DEVICE_TABLE(pcmcia, tc589_ids);
956
957 static struct pcmcia_driver tc589_driver = {
958 .owner = THIS_MODULE,
959 .drv = {
960 .name = "3c589_cs",
961 },
962 .probe = tc589_probe,
963 .remove = tc589_detach,
964 .id_table = tc589_ids,
965 .suspend = tc589_suspend,
966 .resume = tc589_resume,
967 };
968
969 static int __init init_tc589(void)
970 {
971 return pcmcia_register_driver(&tc589_driver);
972 }
973
974 static void __exit exit_tc589(void)
975 {
976 pcmcia_unregister_driver(&tc589_driver);
977 }
978
979 module_init(init_tc589);
980 module_exit(exit_tc589);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree