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[PATCH] pcmcia: unify attach, EVENT_CARD_INSERTION handlers into one probe callback
[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@redhat.com>
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
43 #include <pcmcia/cs_types.h>
44 #include <pcmcia/cs.h>
45 #include <pcmcia/cistpl.h>
46 #include <pcmcia/cisreg.h>
47 #include <pcmcia/ciscode.h>
48 #include <pcmcia/ds.h>
49
50 #include <asm/uaccess.h>
51 #include <asm/io.h>
52 #include <asm/system.h>
53
54 /* To minimize the size of the driver source I only define operating
55 constants if they are used several times. You'll need the manual
56 if you want to understand driver details. */
57 /* Offsets from base I/O address. */
58 #define EL3_DATA 0x00
59 #define EL3_TIMER 0x0a
60 #define EL3_CMD 0x0e
61 #define EL3_STATUS 0x0e
62
63 #define EEPROM_READ 0x0080
64 #define EEPROM_BUSY 0x8000
65
66 #define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
67
68 /* The top five bits written to EL3_CMD are a command, the lower
69 11 bits are the parameter, if applicable. */
70 enum c509cmd {
71 TotalReset = 0<<11, SelectWindow = 1<<11, StartCoax = 2<<11,
72 RxDisable = 3<<11, RxEnable = 4<<11, RxReset = 5<<11, RxDiscard = 8<<11,
73 TxEnable = 9<<11, TxDisable = 10<<11, TxReset = 11<<11,
74 FakeIntr = 12<<11, AckIntr = 13<<11, SetIntrEnb = 14<<11,
75 SetStatusEnb = 15<<11, SetRxFilter = 16<<11, SetRxThreshold = 17<<11,
76 SetTxThreshold = 18<<11, SetTxStart = 19<<11, StatsEnable = 21<<11,
77 StatsDisable = 22<<11, StopCoax = 23<<11,
78 };
79
80 enum c509status {
81 IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004,
82 TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
83 IntReq = 0x0040, StatsFull = 0x0080, CmdBusy = 0x1000
84 };
85
86 /* The SetRxFilter command accepts the following classes: */
87 enum RxFilter {
88 RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8
89 };
90
91 /* Register window 1 offsets, the window used in normal operation. */
92 #define TX_FIFO 0x00
93 #define RX_FIFO 0x00
94 #define RX_STATUS 0x08
95 #define TX_STATUS 0x0B
96 #define TX_FREE 0x0C /* Remaining free bytes in Tx buffer. */
97
98 #define WN0_IRQ 0x08 /* Window 0: Set IRQ line in bits 12-15. */
99 #define WN4_MEDIA 0x0A /* Window 4: Various transcvr/media bits. */
100 #define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */
101 #define MEDIA_LED 0x0001 /* Enable link light on 3C589E cards. */
102
103 /* Time in jiffies before concluding Tx hung */
104 #define TX_TIMEOUT ((400*HZ)/1000)
105
106 struct el3_private {
107 dev_link_t link;
108 dev_node_t node;
109 struct net_device_stats stats;
110 /* For transceiver monitoring */
111 struct timer_list media;
112 u16 media_status;
113 u16 fast_poll;
114 unsigned long last_irq;
115 spinlock_t lock;
116 };
117
118 static char *if_names[] = { "auto", "10baseT", "10base2", "AUI" };
119
120 /*====================================================================*/
121
122 /* Module parameters */
123
124 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
125 MODULE_DESCRIPTION("3Com 3c589 series PCMCIA ethernet driver");
126 MODULE_LICENSE("GPL");
127
128 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
129
130 /* Special hook for setting if_port when module is loaded */
131 INT_MODULE_PARM(if_port, 0);
132
133 #ifdef PCMCIA_DEBUG
134 INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG);
135 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
136 static char *version =
137 DRV_NAME ".c " DRV_VERSION " 2001/10/13 00:08:50 (David Hinds)";
138 #else
139 #define DEBUG(n, args...)
140 #endif
141
142 /*====================================================================*/
143
144 static void tc589_config(dev_link_t *link);
145 static void tc589_release(dev_link_t *link);
146
147 static u16 read_eeprom(kio_addr_t ioaddr, int index);
148 static void tc589_reset(struct net_device *dev);
149 static void media_check(unsigned long arg);
150 static int el3_config(struct net_device *dev, struct ifmap *map);
151 static int el3_open(struct net_device *dev);
152 static int el3_start_xmit(struct sk_buff *skb, struct net_device *dev);
153 static irqreturn_t el3_interrupt(int irq, void *dev_id, struct pt_regs *regs);
154 static void update_stats(struct net_device *dev);
155 static struct net_device_stats *el3_get_stats(struct net_device *dev);
156 static int el3_rx(struct net_device *dev);
157 static int el3_close(struct net_device *dev);
158 static void el3_tx_timeout(struct net_device *dev);
159 static void set_multicast_list(struct net_device *dev);
160 static struct ethtool_ops netdev_ethtool_ops;
161
162 static void tc589_detach(struct pcmcia_device *p_dev);
163
164 /*======================================================================
165
166 tc589_attach() creates an "instance" of the driver, allocating
167 local data structures for one device. The device is registered
168 with Card Services.
169
170 ======================================================================*/
171
172 static int tc589_attach(struct pcmcia_device *p_dev)
173 {
174 struct el3_private *lp;
175 dev_link_t *link;
176 struct net_device *dev;
177
178 DEBUG(0, "3c589_attach()\n");
179
180 /* Create new ethernet device */
181 dev = alloc_etherdev(sizeof(struct el3_private));
182 if (!dev)
183 return -ENOMEM;
184 lp = netdev_priv(dev);
185 link = &lp->link;
186 link->priv = dev;
187
188 spin_lock_init(&lp->lock);
189 link->io.NumPorts1 = 16;
190 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
191 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
192 link->irq.IRQInfo1 = IRQ_LEVEL_ID;
193 link->irq.Handler = &el3_interrupt;
194 link->irq.Instance = dev;
195 link->conf.Attributes = CONF_ENABLE_IRQ;
196 link->conf.Vcc = 50;
197 link->conf.IntType = INT_MEMORY_AND_IO;
198 link->conf.ConfigIndex = 1;
199 link->conf.Present = PRESENT_OPTION;
200
201 /* The EL3-specific entries in the device structure. */
202 SET_MODULE_OWNER(dev);
203 dev->hard_start_xmit = &el3_start_xmit;
204 dev->set_config = &el3_config;
205 dev->get_stats = &el3_get_stats;
206 dev->set_multicast_list = &set_multicast_list;
207 dev->open = &el3_open;
208 dev->stop = &el3_close;
209 #ifdef HAVE_TX_TIMEOUT
210 dev->tx_timeout = el3_tx_timeout;
211 dev->watchdog_timeo = TX_TIMEOUT;
212 #endif
213 SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
214
215 link->handle = p_dev;
216 p_dev->instance = link;
217
218 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
219 tc589_config(link);
220
221 return 0;
222 } /* tc589_attach */
223
224 /*======================================================================
225
226 This deletes a driver "instance". The device is de-registered
227 with Card Services. If it has been released, all local data
228 structures are freed. Otherwise, the structures will be freed
229 when the device is released.
230
231 ======================================================================*/
232
233 static void tc589_detach(struct pcmcia_device *p_dev)
234 {
235 dev_link_t *link = dev_to_instance(p_dev);
236 struct net_device *dev = link->priv;
237
238 DEBUG(0, "3c589_detach(0x%p)\n", link);
239
240 if (link->dev)
241 unregister_netdev(dev);
242
243 if (link->state & DEV_CONFIG)
244 tc589_release(link);
245
246 free_netdev(dev);
247 } /* tc589_detach */
248
249 /*======================================================================
250
251 tc589_config() is scheduled to run after a CARD_INSERTION event
252 is received, to configure the PCMCIA socket, and to make the
253 ethernet device available to the system.
254
255 ======================================================================*/
256
257 #define CS_CHECK(fn, ret) \
258 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
259
260 static void tc589_config(dev_link_t *link)
261 {
262 client_handle_t handle = link->handle;
263 struct net_device *dev = link->priv;
264 struct el3_private *lp = netdev_priv(dev);
265 tuple_t tuple;
266 cisparse_t parse;
267 u16 buf[32], *phys_addr;
268 int last_fn, last_ret, i, j, multi = 0, fifo;
269 kio_addr_t ioaddr;
270 char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
271
272 DEBUG(0, "3c589_config(0x%p)\n", link);
273
274 phys_addr = (u16 *)dev->dev_addr;
275 tuple.Attributes = 0;
276 tuple.DesiredTuple = CISTPL_CONFIG;
277 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
278 tuple.TupleData = (cisdata_t *)buf;
279 tuple.TupleDataMax = sizeof(buf);
280 tuple.TupleOffset = 0;
281 CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
282 CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
283 link->conf.ConfigBase = parse.config.base;
284 link->conf.Present = parse.config.rmask[0];
285
286 /* Is this a 3c562? */
287 tuple.DesiredTuple = CISTPL_MANFID;
288 tuple.Attributes = TUPLE_RETURN_COMMON;
289 if ((pcmcia_get_first_tuple(handle, &tuple) == CS_SUCCESS) &&
290 (pcmcia_get_tuple_data(handle, &tuple) == CS_SUCCESS)) {
291 if (le16_to_cpu(buf[0]) != MANFID_3COM)
292 printk(KERN_INFO "3c589_cs: hmmm, is this really a "
293 "3Com card??\n");
294 multi = (le16_to_cpu(buf[1]) == PRODID_3COM_3C562);
295 }
296
297 /* Configure card */
298 link->state |= DEV_CONFIG;
299
300 /* For the 3c562, the base address must be xx00-xx7f */
301 link->io.IOAddrLines = 16;
302 for (i = j = 0; j < 0x400; j += 0x10) {
303 if (multi && (j & 0x80)) continue;
304 link->io.BasePort1 = j ^ 0x300;
305 i = pcmcia_request_io(link->handle, &link->io);
306 if (i == CS_SUCCESS) break;
307 }
308 if (i != CS_SUCCESS) {
309 cs_error(link->handle, RequestIO, i);
310 goto failed;
311 }
312 CS_CHECK(RequestIRQ, pcmcia_request_irq(link->handle, &link->irq));
313 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link->handle, &link->conf));
314
315 dev->irq = link->irq.AssignedIRQ;
316 dev->base_addr = link->io.BasePort1;
317 ioaddr = dev->base_addr;
318 EL3WINDOW(0);
319
320 /* The 3c589 has an extra EEPROM for configuration info, including
321 the hardware address. The 3c562 puts the address in the CIS. */
322 tuple.DesiredTuple = 0x88;
323 if (pcmcia_get_first_tuple(handle, &tuple) == CS_SUCCESS) {
324 pcmcia_get_tuple_data(handle, &tuple);
325 for (i = 0; i < 3; i++)
326 phys_addr[i] = htons(buf[i]);
327 } else {
328 for (i = 0; i < 3; i++)
329 phys_addr[i] = htons(read_eeprom(ioaddr, i));
330 if (phys_addr[0] == 0x6060) {
331 printk(KERN_ERR "3c589_cs: IO port conflict at 0x%03lx"
332 "-0x%03lx\n", dev->base_addr, dev->base_addr+15);
333 goto failed;
334 }
335 }
336
337 /* The address and resource configuration register aren't loaded from
338 the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version. */
339 outw(0x3f00, ioaddr + 8);
340 fifo = inl(ioaddr);
341
342 /* The if_port symbol can be set when the module is loaded */
343 if ((if_port >= 0) && (if_port <= 3))
344 dev->if_port = if_port;
345 else
346 printk(KERN_ERR "3c589_cs: invalid if_port requested\n");
347
348 link->dev = &lp->node;
349 link->state &= ~DEV_CONFIG_PENDING;
350 SET_NETDEV_DEV(dev, &handle_to_dev(handle));
351
352 if (register_netdev(dev) != 0) {
353 printk(KERN_ERR "3c589_cs: register_netdev() failed\n");
354 link->dev = NULL;
355 goto failed;
356 }
357
358 strcpy(lp->node.dev_name, dev->name);
359
360 printk(KERN_INFO "%s: 3Com 3c%s, io %#3lx, irq %d, hw_addr ",
361 dev->name, (multi ? "562" : "589"), dev->base_addr,
362 dev->irq);
363 for (i = 0; i < 6; i++)
364 printk("%02X%s", dev->dev_addr[i], ((i<5) ? ":" : "\n"));
365 printk(KERN_INFO " %dK FIFO split %s Rx:Tx, %s xcvr\n",
366 (fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3],
367 if_names[dev->if_port]);
368 return;
369
370 cs_failed:
371 cs_error(link->handle, last_fn, last_ret);
372 failed:
373 tc589_release(link);
374 return;
375
376 } /* tc589_config */
377
378 /*======================================================================
379
380 After a card is removed, tc589_release() will unregister the net
381 device, and release the PCMCIA configuration. If the device is
382 still open, this will be postponed until it is closed.
383
384 ======================================================================*/
385
386 static void tc589_release(dev_link_t *link)
387 {
388 DEBUG(0, "3c589_release(0x%p)\n", link);
389
390 pcmcia_release_configuration(link->handle);
391 pcmcia_release_io(link->handle, &link->io);
392 pcmcia_release_irq(link->handle, &link->irq);
393
394 link->state &= ~DEV_CONFIG;
395 }
396
397 static int tc589_suspend(struct pcmcia_device *p_dev)
398 {
399 dev_link_t *link = dev_to_instance(p_dev);
400 struct net_device *dev = link->priv;
401
402 link->state |= DEV_SUSPEND;
403 if (link->state & DEV_CONFIG) {
404 if (link->open)
405 netif_device_detach(dev);
406 pcmcia_release_configuration(link->handle);
407 }
408
409 return 0;
410 }
411
412 static int tc589_resume(struct pcmcia_device *p_dev)
413 {
414 dev_link_t *link = dev_to_instance(p_dev);
415 struct net_device *dev = link->priv;
416
417 link->state &= ~DEV_SUSPEND;
418 if (link->state & DEV_CONFIG) {
419 pcmcia_request_configuration(link->handle, &link->conf);
420 if (link->open) {
421 tc589_reset(dev);
422 netif_device_attach(dev);
423 }
424 }
425
426 return 0;
427 }
428
429 /*====================================================================*/
430
431 /*
432 Use this for commands that may take time to finish
433 */
434 static void tc589_wait_for_completion(struct net_device *dev, int cmd)
435 {
436 int i = 100;
437 outw(cmd, dev->base_addr + EL3_CMD);
438 while (--i > 0)
439 if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break;
440 if (i == 0)
441 printk(KERN_WARNING "%s: command 0x%04x did not complete!\n",
442 dev->name, cmd);
443 }
444
445 /*
446 Read a word from the EEPROM using the regular EEPROM access register.
447 Assume that we are in register window zero.
448 */
449 static u16 read_eeprom(kio_addr_t ioaddr, int index)
450 {
451 int i;
452 outw(EEPROM_READ + index, ioaddr + 10);
453 /* Reading the eeprom takes 162 us */
454 for (i = 1620; i >= 0; i--)
455 if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
456 break;
457 return inw(ioaddr + 12);
458 }
459
460 /*
461 Set transceiver type, perhaps to something other than what the user
462 specified in dev->if_port.
463 */
464 static void tc589_set_xcvr(struct net_device *dev, int if_port)
465 {
466 struct el3_private *lp = netdev_priv(dev);
467 kio_addr_t ioaddr = dev->base_addr;
468
469 EL3WINDOW(0);
470 switch (if_port) {
471 case 0: case 1: outw(0, ioaddr + 6); break;
472 case 2: outw(3<<14, ioaddr + 6); break;
473 case 3: outw(1<<14, ioaddr + 6); break;
474 }
475 /* On PCMCIA, this just turns on the LED */
476 outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD);
477 /* 10baseT interface, enable link beat and jabber check. */
478 EL3WINDOW(4);
479 outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA);
480 EL3WINDOW(1);
481 if (if_port == 2)
482 lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000);
483 else
484 lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800);
485 }
486
487 static void dump_status(struct net_device *dev)
488 {
489 kio_addr_t ioaddr = dev->base_addr;
490 EL3WINDOW(1);
491 printk(KERN_INFO " irq status %04x, rx status %04x, tx status "
492 "%02x tx free %04x\n", inw(ioaddr+EL3_STATUS),
493 inw(ioaddr+RX_STATUS), inb(ioaddr+TX_STATUS),
494 inw(ioaddr+TX_FREE));
495 EL3WINDOW(4);
496 printk(KERN_INFO " diagnostics: fifo %04x net %04x ethernet %04x"
497 " media %04x\n", inw(ioaddr+0x04), inw(ioaddr+0x06),
498 inw(ioaddr+0x08), inw(ioaddr+0x0a));
499 EL3WINDOW(1);
500 }
501
502 /* Reset and restore all of the 3c589 registers. */
503 static void tc589_reset(struct net_device *dev)
504 {
505 kio_addr_t ioaddr = dev->base_addr;
506 int i;
507
508 EL3WINDOW(0);
509 outw(0x0001, ioaddr + 4); /* Activate board. */
510 outw(0x3f00, ioaddr + 8); /* Set the IRQ line. */
511
512 /* Set the station address in window 2. */
513 EL3WINDOW(2);
514 for (i = 0; i < 6; i++)
515 outb(dev->dev_addr[i], ioaddr + i);
516
517 tc589_set_xcvr(dev, dev->if_port);
518
519 /* Switch to the stats window, and clear all stats by reading. */
520 outw(StatsDisable, ioaddr + EL3_CMD);
521 EL3WINDOW(6);
522 for (i = 0; i < 9; i++)
523 inb(ioaddr+i);
524 inw(ioaddr + 10);
525 inw(ioaddr + 12);
526
527 /* Switch to register set 1 for normal use. */
528 EL3WINDOW(1);
529
530 /* Accept b-cast and phys addr only. */
531 outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD);
532 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
533 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
534 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
535 /* Allow status bits to be seen. */
536 outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
537 /* Ack all pending events, and set active indicator mask. */
538 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
539 ioaddr + EL3_CMD);
540 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
541 | AdapterFailure, ioaddr + EL3_CMD);
542 }
543
544 static void netdev_get_drvinfo(struct net_device *dev,
545 struct ethtool_drvinfo *info)
546 {
547 strcpy(info->driver, DRV_NAME);
548 strcpy(info->version, DRV_VERSION);
549 sprintf(info->bus_info, "PCMCIA 0x%lx", dev->base_addr);
550 }
551
552 #ifdef PCMCIA_DEBUG
553 static u32 netdev_get_msglevel(struct net_device *dev)
554 {
555 return pc_debug;
556 }
557
558 static void netdev_set_msglevel(struct net_device *dev, u32 level)
559 {
560 pc_debug = level;
561 }
562 #endif /* PCMCIA_DEBUG */
563
564 static struct ethtool_ops netdev_ethtool_ops = {
565 .get_drvinfo = netdev_get_drvinfo,
566 #ifdef PCMCIA_DEBUG
567 .get_msglevel = netdev_get_msglevel,
568 .set_msglevel = netdev_set_msglevel,
569 #endif /* PCMCIA_DEBUG */
570 };
571
572 static int el3_config(struct net_device *dev, struct ifmap *map)
573 {
574 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
575 if (map->port <= 3) {
576 dev->if_port = map->port;
577 printk(KERN_INFO "%s: switched to %s port\n",
578 dev->name, if_names[dev->if_port]);
579 tc589_set_xcvr(dev, dev->if_port);
580 } else
581 return -EINVAL;
582 }
583 return 0;
584 }
585
586 static int el3_open(struct net_device *dev)
587 {
588 struct el3_private *lp = netdev_priv(dev);
589 dev_link_t *link = &lp->link;
590
591 if (!DEV_OK(link))
592 return -ENODEV;
593
594 link->open++;
595 netif_start_queue(dev);
596
597 tc589_reset(dev);
598 init_timer(&lp->media);
599 lp->media.function = &media_check;
600 lp->media.data = (unsigned long) dev;
601 lp->media.expires = jiffies + HZ;
602 add_timer(&lp->media);
603
604 DEBUG(1, "%s: opened, status %4.4x.\n",
605 dev->name, inw(dev->base_addr + EL3_STATUS));
606
607 return 0;
608 }
609
610 static void el3_tx_timeout(struct net_device *dev)
611 {
612 struct el3_private *lp = netdev_priv(dev);
613 kio_addr_t ioaddr = dev->base_addr;
614
615 printk(KERN_WARNING "%s: Transmit timed out!\n", dev->name);
616 dump_status(dev);
617 lp->stats.tx_errors++;
618 dev->trans_start = jiffies;
619 /* Issue TX_RESET and TX_START commands. */
620 tc589_wait_for_completion(dev, TxReset);
621 outw(TxEnable, ioaddr + EL3_CMD);
622 netif_wake_queue(dev);
623 }
624
625 static void pop_tx_status(struct net_device *dev)
626 {
627 struct el3_private *lp = netdev_priv(dev);
628 kio_addr_t ioaddr = dev->base_addr;
629 int i;
630
631 /* Clear the Tx status stack. */
632 for (i = 32; i > 0; i--) {
633 u_char tx_status = inb(ioaddr + TX_STATUS);
634 if (!(tx_status & 0x84)) break;
635 /* reset transmitter on jabber error or underrun */
636 if (tx_status & 0x30)
637 tc589_wait_for_completion(dev, TxReset);
638 if (tx_status & 0x38) {
639 DEBUG(1, "%s: transmit error: status 0x%02x\n",
640 dev->name, tx_status);
641 outw(TxEnable, ioaddr + EL3_CMD);
642 lp->stats.tx_aborted_errors++;
643 }
644 outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
645 }
646 }
647
648 static int el3_start_xmit(struct sk_buff *skb, struct net_device *dev)
649 {
650 kio_addr_t ioaddr = dev->base_addr;
651 struct el3_private *priv = netdev_priv(dev);
652
653 DEBUG(3, "%s: el3_start_xmit(length = %ld) called, "
654 "status %4.4x.\n", dev->name, (long)skb->len,
655 inw(ioaddr + EL3_STATUS));
656
657 priv->stats.tx_bytes += skb->len;
658
659 /* Put out the doubleword header... */
660 outw(skb->len, ioaddr + TX_FIFO);
661 outw(0x00, ioaddr + TX_FIFO);
662 /* ... and the packet rounded to a doubleword. */
663 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
664
665 dev->trans_start = jiffies;
666 if (inw(ioaddr + TX_FREE) <= 1536) {
667 netif_stop_queue(dev);
668 /* Interrupt us when the FIFO has room for max-sized packet. */
669 outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
670 }
671
672 dev_kfree_skb(skb);
673 pop_tx_status(dev);
674
675 return 0;
676 }
677
678 /* The EL3 interrupt handler. */
679 static irqreturn_t el3_interrupt(int irq, void *dev_id, struct pt_regs *regs)
680 {
681 struct net_device *dev = (struct net_device *) dev_id;
682 struct el3_private *lp = netdev_priv(dev);
683 kio_addr_t ioaddr;
684 __u16 status;
685 int i = 0, handled = 1;
686
687 if (!netif_device_present(dev))
688 return IRQ_NONE;
689
690 ioaddr = dev->base_addr;
691
692 DEBUG(3, "%s: interrupt, status %4.4x.\n",
693 dev->name, inw(ioaddr + EL3_STATUS));
694
695 spin_lock(&lp->lock);
696 while ((status = inw(ioaddr + EL3_STATUS)) &
697 (IntLatch | RxComplete | StatsFull)) {
698 if ((status & 0xe000) != 0x2000) {
699 DEBUG(1, "%s: interrupt from dead card\n", dev->name);
700 handled = 0;
701 break;
702 }
703
704 if (status & RxComplete)
705 el3_rx(dev);
706
707 if (status & TxAvailable) {
708 DEBUG(3, " TX room bit was handled.\n");
709 /* There's room in the FIFO for a full-sized packet. */
710 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
711 netif_wake_queue(dev);
712 }
713
714 if (status & TxComplete)
715 pop_tx_status(dev);
716
717 if (status & (AdapterFailure | RxEarly | StatsFull)) {
718 /* Handle all uncommon interrupts. */
719 if (status & StatsFull) /* Empty statistics. */
720 update_stats(dev);
721 if (status & RxEarly) { /* Rx early is unused. */
722 el3_rx(dev);
723 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
724 }
725 if (status & AdapterFailure) {
726 u16 fifo_diag;
727 EL3WINDOW(4);
728 fifo_diag = inw(ioaddr + 4);
729 EL3WINDOW(1);
730 printk(KERN_WARNING "%s: adapter failure, FIFO diagnostic"
731 " register %04x.\n", dev->name, fifo_diag);
732 if (fifo_diag & 0x0400) {
733 /* Tx overrun */
734 tc589_wait_for_completion(dev, TxReset);
735 outw(TxEnable, ioaddr + EL3_CMD);
736 }
737 if (fifo_diag & 0x2000) {
738 /* Rx underrun */
739 tc589_wait_for_completion(dev, RxReset);
740 set_multicast_list(dev);
741 outw(RxEnable, ioaddr + EL3_CMD);
742 }
743 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
744 }
745 }
746
747 if (++i > 10) {
748 printk(KERN_ERR "%s: infinite loop in interrupt, "
749 "status %4.4x.\n", dev->name, status);
750 /* Clear all interrupts */
751 outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
752 break;
753 }
754 /* Acknowledge the IRQ. */
755 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
756 }
757
758 lp->last_irq = jiffies;
759 spin_unlock(&lp->lock);
760 DEBUG(3, "%s: exiting interrupt, status %4.4x.\n",
761 dev->name, inw(ioaddr + EL3_STATUS));
762 return IRQ_RETVAL(handled);
763 }
764
765 static void media_check(unsigned long arg)
766 {
767 struct net_device *dev = (struct net_device *)(arg);
768 struct el3_private *lp = netdev_priv(dev);
769 kio_addr_t ioaddr = dev->base_addr;
770 u16 media, errs;
771 unsigned long flags;
772
773 if (!netif_device_present(dev)) goto reschedule;
774
775 EL3WINDOW(1);
776 /* Check for pending interrupt with expired latency timer: with
777 this, we can limp along even if the interrupt is blocked */
778 if ((inw(ioaddr + EL3_STATUS) & IntLatch) &&
779 (inb(ioaddr + EL3_TIMER) == 0xff)) {
780 if (!lp->fast_poll)
781 printk(KERN_WARNING "%s: interrupt(s) dropped!\n", dev->name);
782 el3_interrupt(dev->irq, lp, NULL);
783 lp->fast_poll = HZ;
784 }
785 if (lp->fast_poll) {
786 lp->fast_poll--;
787 lp->media.expires = jiffies + HZ/100;
788 add_timer(&lp->media);
789 return;
790 }
791
792 /* lp->lock guards the EL3 window. Window should always be 1 except
793 when the lock is held */
794 spin_lock_irqsave(&lp->lock, flags);
795 EL3WINDOW(4);
796 media = inw(ioaddr+WN4_MEDIA) & 0xc810;
797
798 /* Ignore collisions unless we've had no irq's recently */
799 if (jiffies - lp->last_irq < HZ) {
800 media &= ~0x0010;
801 } else {
802 /* Try harder to detect carrier errors */
803 EL3WINDOW(6);
804 outw(StatsDisable, ioaddr + EL3_CMD);
805 errs = inb(ioaddr + 0);
806 outw(StatsEnable, ioaddr + EL3_CMD);
807 lp->stats.tx_carrier_errors += errs;
808 if (errs || (lp->media_status & 0x0010)) media |= 0x0010;
809 }
810
811 if (media != lp->media_status) {
812 if ((media & lp->media_status & 0x8000) &&
813 ((lp->media_status ^ media) & 0x0800))
814 printk(KERN_INFO "%s: %s link beat\n", dev->name,
815 (lp->media_status & 0x0800 ? "lost" : "found"));
816 else if ((media & lp->media_status & 0x4000) &&
817 ((lp->media_status ^ media) & 0x0010))
818 printk(KERN_INFO "%s: coax cable %s\n", dev->name,
819 (lp->media_status & 0x0010 ? "ok" : "problem"));
820 if (dev->if_port == 0) {
821 if (media & 0x8000) {
822 if (media & 0x0800)
823 printk(KERN_INFO "%s: flipped to 10baseT\n",
824 dev->name);
825 else
826 tc589_set_xcvr(dev, 2);
827 } else if (media & 0x4000) {
828 if (media & 0x0010)
829 tc589_set_xcvr(dev, 1);
830 else
831 printk(KERN_INFO "%s: flipped to 10base2\n",
832 dev->name);
833 }
834 }
835 lp->media_status = media;
836 }
837
838 EL3WINDOW(1);
839 spin_unlock_irqrestore(&lp->lock, flags);
840
841 reschedule:
842 lp->media.expires = jiffies + HZ;
843 add_timer(&lp->media);
844 }
845
846 static struct net_device_stats *el3_get_stats(struct net_device *dev)
847 {
848 struct el3_private *lp = netdev_priv(dev);
849 unsigned long flags;
850 dev_link_t *link = &lp->link;
851
852 if (DEV_OK(link)) {
853 spin_lock_irqsave(&lp->lock, flags);
854 update_stats(dev);
855 spin_unlock_irqrestore(&lp->lock, flags);
856 }
857 return &lp->stats;
858 }
859
860 /*
861 Update statistics. We change to register window 6, so this should be run
862 single-threaded if the device is active. This is expected to be a rare
863 operation, and it's simpler for the rest of the driver to assume that
864 window 1 is always valid rather than use a special window-state variable.
865
866 Caller must hold the lock for this
867 */
868 static void update_stats(struct net_device *dev)
869 {
870 struct el3_private *lp = netdev_priv(dev);
871 kio_addr_t ioaddr = dev->base_addr;
872
873 DEBUG(2, "%s: updating the statistics.\n", dev->name);
874 /* Turn off statistics updates while reading. */
875 outw(StatsDisable, ioaddr + EL3_CMD);
876 /* Switch to the stats window, and read everything. */
877 EL3WINDOW(6);
878 lp->stats.tx_carrier_errors += inb(ioaddr + 0);
879 lp->stats.tx_heartbeat_errors += inb(ioaddr + 1);
880 /* Multiple collisions. */ inb(ioaddr + 2);
881 lp->stats.collisions += inb(ioaddr + 3);
882 lp->stats.tx_window_errors += inb(ioaddr + 4);
883 lp->stats.rx_fifo_errors += inb(ioaddr + 5);
884 lp->stats.tx_packets += inb(ioaddr + 6);
885 /* Rx packets */ inb(ioaddr + 7);
886 /* Tx deferrals */ inb(ioaddr + 8);
887 /* Rx octets */ inw(ioaddr + 10);
888 /* Tx octets */ inw(ioaddr + 12);
889
890 /* Back to window 1, and turn statistics back on. */
891 EL3WINDOW(1);
892 outw(StatsEnable, ioaddr + EL3_CMD);
893 }
894
895 static int el3_rx(struct net_device *dev)
896 {
897 struct el3_private *lp = netdev_priv(dev);
898 kio_addr_t ioaddr = dev->base_addr;
899 int worklimit = 32;
900 short rx_status;
901
902 DEBUG(3, "%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n",
903 dev->name, inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
904 while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
905 (--worklimit >= 0)) {
906 if (rx_status & 0x4000) { /* Error, update stats. */
907 short error = rx_status & 0x3800;
908 lp->stats.rx_errors++;
909 switch (error) {
910 case 0x0000: lp->stats.rx_over_errors++; break;
911 case 0x0800: lp->stats.rx_length_errors++; break;
912 case 0x1000: lp->stats.rx_frame_errors++; break;
913 case 0x1800: lp->stats.rx_length_errors++; break;
914 case 0x2000: lp->stats.rx_frame_errors++; break;
915 case 0x2800: lp->stats.rx_crc_errors++; break;
916 }
917 } else {
918 short pkt_len = rx_status & 0x7ff;
919 struct sk_buff *skb;
920
921 skb = dev_alloc_skb(pkt_len+5);
922
923 DEBUG(3, " Receiving packet size %d status %4.4x.\n",
924 pkt_len, rx_status);
925 if (skb != NULL) {
926 skb->dev = dev;
927 skb_reserve(skb, 2);
928 insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
929 (pkt_len+3)>>2);
930 skb->protocol = eth_type_trans(skb, dev);
931 netif_rx(skb);
932 dev->last_rx = jiffies;
933 lp->stats.rx_packets++;
934 lp->stats.rx_bytes += pkt_len;
935 } else {
936 DEBUG(1, "%s: couldn't allocate a sk_buff of"
937 " size %d.\n", dev->name, pkt_len);
938 lp->stats.rx_dropped++;
939 }
940 }
941 /* Pop the top of the Rx FIFO */
942 tc589_wait_for_completion(dev, RxDiscard);
943 }
944 if (worklimit == 0)
945 printk(KERN_WARNING "%s: too much work in el3_rx!\n", dev->name);
946 return 0;
947 }
948
949 static void set_multicast_list(struct net_device *dev)
950 {
951 struct el3_private *lp = netdev_priv(dev);
952 dev_link_t *link = &lp->link;
953 kio_addr_t ioaddr = dev->base_addr;
954 u16 opts = SetRxFilter | RxStation | RxBroadcast;
955
956 if (!(DEV_OK(link))) return;
957 if (dev->flags & IFF_PROMISC)
958 opts |= RxMulticast | RxProm;
959 else if (dev->mc_count || (dev->flags & IFF_ALLMULTI))
960 opts |= RxMulticast;
961 outw(opts, ioaddr + EL3_CMD);
962 }
963
964 static int el3_close(struct net_device *dev)
965 {
966 struct el3_private *lp = netdev_priv(dev);
967 dev_link_t *link = &lp->link;
968 kio_addr_t ioaddr = dev->base_addr;
969
970 DEBUG(1, "%s: shutting down ethercard.\n", dev->name);
971
972 if (DEV_OK(link)) {
973 /* Turn off statistics ASAP. We update lp->stats below. */
974 outw(StatsDisable, ioaddr + EL3_CMD);
975
976 /* Disable the receiver and transmitter. */
977 outw(RxDisable, ioaddr + EL3_CMD);
978 outw(TxDisable, ioaddr + EL3_CMD);
979
980 if (dev->if_port == 2)
981 /* Turn off thinnet power. Green! */
982 outw(StopCoax, ioaddr + EL3_CMD);
983 else if (dev->if_port == 1) {
984 /* Disable link beat and jabber */
985 EL3WINDOW(4);
986 outw(0, ioaddr + WN4_MEDIA);
987 }
988
989 /* Switching back to window 0 disables the IRQ. */
990 EL3WINDOW(0);
991 /* But we explicitly zero the IRQ line select anyway. */
992 outw(0x0f00, ioaddr + WN0_IRQ);
993
994 /* Check if the card still exists */
995 if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000)
996 update_stats(dev);
997 }
998
999 link->open--;
1000 netif_stop_queue(dev);
1001 del_timer_sync(&lp->media);
1002
1003 return 0;
1004 }
1005
1006 static struct pcmcia_device_id tc589_ids[] = {
1007 PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562),
1008 PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77),
1009 PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589),
1010 PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202),
1011 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "3CXEM556.cis"),
1012 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "3CXEM556.cis"),
1013 PCMCIA_DEVICE_NULL,
1014 };
1015 MODULE_DEVICE_TABLE(pcmcia, tc589_ids);
1016
1017 static struct pcmcia_driver tc589_driver = {
1018 .owner = THIS_MODULE,
1019 .drv = {
1020 .name = "3c589_cs",
1021 },
1022 .probe = tc589_attach,
1023 .remove = tc589_detach,
1024 .id_table = tc589_ids,
1025 .suspend = tc589_suspend,
1026 .resume = tc589_resume,
1027 };
1028
1029 static int __init init_tc589(void)
1030 {
1031 return pcmcia_register_driver(&tc589_driver);
1032 }
1033
1034 static void __exit exit_tc589(void)
1035 {
1036 pcmcia_unregister_driver(&tc589_driver);
1037 }
1038
1039 module_init(init_tc589);
1040 module_exit(exit_tc589);
Linux kernel - Deliverables
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