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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/version.h>
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, SelectWindow = 1<<11, StartCoax = 2<<11,
73 RxDisable = 3<<11, RxEnable = 4<<11, RxReset = 5<<11, RxDiscard = 8<<11,
74 TxEnable = 9<<11, TxDisable = 10<<11, TxReset = 11<<11,
75 FakeIntr = 12<<11, AckIntr = 13<<11, SetIntrEnb = 14<<11,
76 SetStatusEnb = 15<<11, SetRxFilter = 16<<11, SetRxThreshold = 17<<11,
77 SetTxThreshold = 18<<11, SetTxStart = 19<<11, StatsEnable = 21<<11,
78 StatsDisable = 22<<11, StopCoax = 23<<11,
79 };
80
81 enum c509status {
82 IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004,
83 TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
84 IntReq = 0x0040, StatsFull = 0x0080, CmdBusy = 0x1000
85 };
86
87 /* The SetRxFilter command accepts the following classes: */
88 enum RxFilter {
89 RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8
90 };
91
92 /* Register window 1 offsets, the window used in normal operation. */
93 #define TX_FIFO 0x00
94 #define RX_FIFO 0x00
95 #define RX_STATUS 0x08
96 #define TX_STATUS 0x0B
97 #define TX_FREE 0x0C /* Remaining free bytes in Tx buffer. */
98
99 #define WN0_IRQ 0x08 /* Window 0: Set IRQ line in bits 12-15. */
100 #define WN4_MEDIA 0x0A /* Window 4: Various transcvr/media bits. */
101 #define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */
102 #define MEDIA_LED 0x0001 /* Enable link light on 3C589E cards. */
103
104 /* Time in jiffies before concluding Tx hung */
105 #define TX_TIMEOUT ((400*HZ)/1000)
106
107 struct el3_private {
108 dev_link_t link;
109 dev_node_t node;
110 struct net_device_stats stats;
111 /* For transceiver monitoring */
112 struct timer_list media;
113 u16 media_status;
114 u16 fast_poll;
115 unsigned long last_irq;
116 spinlock_t lock;
117 };
118
119 static char *if_names[] = { "auto", "10baseT", "10base2", "AUI" };
120
121 /*====================================================================*/
122
123 /* Module parameters */
124
125 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
126 MODULE_DESCRIPTION("3Com 3c589 series PCMCIA ethernet driver");
127 MODULE_LICENSE("GPL");
128
129 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
130
131 /* Special hook for setting if_port when module is loaded */
132 INT_MODULE_PARM(if_port, 0);
133
134 #ifdef PCMCIA_DEBUG
135 INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG);
136 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
137 static char *version =
138 DRV_NAME ".c " DRV_VERSION " 2001/10/13 00:08:50 (David Hinds)";
139 #else
140 #define DEBUG(n, args...)
141 #endif
142
143 /*====================================================================*/
144
145 static void tc589_config(dev_link_t *link);
146 static void tc589_release(dev_link_t *link);
147 static int tc589_event(event_t event, int priority,
148 event_callback_args_t *args);
149
150 static u16 read_eeprom(kio_addr_t ioaddr, int index);
151 static void tc589_reset(struct net_device *dev);
152 static void media_check(unsigned long arg);
153 static int el3_config(struct net_device *dev, struct ifmap *map);
154 static int el3_open(struct net_device *dev);
155 static int el3_start_xmit(struct sk_buff *skb, struct net_device *dev);
156 static irqreturn_t el3_interrupt(int irq, void *dev_id, struct pt_regs *regs);
157 static void update_stats(struct net_device *dev);
158 static struct net_device_stats *el3_get_stats(struct net_device *dev);
159 static int el3_rx(struct net_device *dev);
160 static int el3_close(struct net_device *dev);
161 static void el3_tx_timeout(struct net_device *dev);
162 static void set_multicast_list(struct net_device *dev);
163 static struct ethtool_ops netdev_ethtool_ops;
164
165 static dev_info_t dev_info = "3c589_cs";
166
167 static dev_link_t *tc589_attach(void);
168 static void tc589_detach(dev_link_t *);
169
170 static dev_link_t *dev_list;
171
172 /*======================================================================
173
174 tc589_attach() creates an "instance" of the driver, allocating
175 local data structures for one device. The device is registered
176 with Card Services.
177
178 ======================================================================*/
179
180 static dev_link_t *tc589_attach(void)
181 {
182 struct el3_private *lp;
183 client_reg_t client_reg;
184 dev_link_t *link;
185 struct net_device *dev;
186 int ret;
187
188 DEBUG(0, "3c589_attach()\n");
189
190 /* Create new ethernet device */
191 dev = alloc_etherdev(sizeof(struct el3_private));
192 if (!dev)
193 return NULL;
194 lp = netdev_priv(dev);
195 link = &lp->link;
196 link->priv = dev;
197
198 spin_lock_init(&lp->lock);
199 link->io.NumPorts1 = 16;
200 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
201 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
202 link->irq.IRQInfo1 = IRQ_LEVEL_ID;
203 link->irq.Handler = &el3_interrupt;
204 link->irq.Instance = dev;
205 link->conf.Attributes = CONF_ENABLE_IRQ;
206 link->conf.Vcc = 50;
207 link->conf.IntType = INT_MEMORY_AND_IO;
208 link->conf.ConfigIndex = 1;
209 link->conf.Present = PRESENT_OPTION;
210
211 /* The EL3-specific entries in the device structure. */
212 SET_MODULE_OWNER(dev);
213 dev->hard_start_xmit = &el3_start_xmit;
214 dev->set_config = &el3_config;
215 dev->get_stats = &el3_get_stats;
216 dev->set_multicast_list = &set_multicast_list;
217 dev->open = &el3_open;
218 dev->stop = &el3_close;
219 #ifdef HAVE_TX_TIMEOUT
220 dev->tx_timeout = el3_tx_timeout;
221 dev->watchdog_timeo = TX_TIMEOUT;
222 #endif
223 SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
224
225 /* Register with Card Services */
226 link->next = dev_list;
227 dev_list = link;
228 client_reg.dev_info = &dev_info;
229 client_reg.Version = 0x0210;
230 client_reg.event_callback_args.client_data = link;
231 ret = pcmcia_register_client(&link->handle, &client_reg);
232 if (ret != 0) {
233 cs_error(link->handle, RegisterClient, ret);
234 tc589_detach(link);
235 return NULL;
236 }
237
238 return link;
239 } /* tc589_attach */
240
241 /*======================================================================
242
243 This deletes a driver "instance". The device is de-registered
244 with Card Services. If it has been released, all local data
245 structures are freed. Otherwise, the structures will be freed
246 when the device is released.
247
248 ======================================================================*/
249
250 static void tc589_detach(dev_link_t *link)
251 {
252 struct net_device *dev = link->priv;
253 dev_link_t **linkp;
254
255 DEBUG(0, "3c589_detach(0x%p)\n", link);
256
257 /* Locate device structure */
258 for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
259 if (*linkp == link) break;
260 if (*linkp == NULL)
261 return;
262
263 if (link->dev)
264 unregister_netdev(dev);
265
266 if (link->state & DEV_CONFIG)
267 tc589_release(link);
268
269 if (link->handle)
270 pcmcia_deregister_client(link->handle);
271
272 /* Unlink device structure, free bits */
273 *linkp = link->next;
274 free_netdev(dev);
275 } /* tc589_detach */
276
277 /*======================================================================
278
279 tc589_config() is scheduled to run after a CARD_INSERTION event
280 is received, to configure the PCMCIA socket, and to make the
281 ethernet device available to the system.
282
283 ======================================================================*/
284
285 #define CS_CHECK(fn, ret) \
286 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
287
288 static void tc589_config(dev_link_t *link)
289 {
290 client_handle_t handle = link->handle;
291 struct net_device *dev = link->priv;
292 struct el3_private *lp = netdev_priv(dev);
293 tuple_t tuple;
294 cisparse_t parse;
295 u16 buf[32], *phys_addr;
296 int last_fn, last_ret, i, j, multi = 0, fifo;
297 kio_addr_t ioaddr;
298 char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
299
300 DEBUG(0, "3c589_config(0x%p)\n", link);
301
302 phys_addr = (u16 *)dev->dev_addr;
303 tuple.Attributes = 0;
304 tuple.DesiredTuple = CISTPL_CONFIG;
305 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
306 tuple.TupleData = (cisdata_t *)buf;
307 tuple.TupleDataMax = sizeof(buf);
308 tuple.TupleOffset = 0;
309 CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
310 CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
311 link->conf.ConfigBase = parse.config.base;
312 link->conf.Present = parse.config.rmask[0];
313
314 /* Is this a 3c562? */
315 tuple.DesiredTuple = CISTPL_MANFID;
316 tuple.Attributes = TUPLE_RETURN_COMMON;
317 if ((pcmcia_get_first_tuple(handle, &tuple) == CS_SUCCESS) &&
318 (pcmcia_get_tuple_data(handle, &tuple) == CS_SUCCESS)) {
319 if (le16_to_cpu(buf[0]) != MANFID_3COM)
320 printk(KERN_INFO "3c589_cs: hmmm, is this really a "
321 "3Com card??\n");
322 multi = (le16_to_cpu(buf[1]) == PRODID_3COM_3C562);
323 }
324
325 /* Configure card */
326 link->state |= DEV_CONFIG;
327
328 /* For the 3c562, the base address must be xx00-xx7f */
329 link->io.IOAddrLines = 16;
330 for (i = j = 0; j < 0x400; j += 0x10) {
331 if (multi && (j & 0x80)) continue;
332 link->io.BasePort1 = j ^ 0x300;
333 i = pcmcia_request_io(link->handle, &link->io);
334 if (i == CS_SUCCESS) break;
335 }
336 if (i != CS_SUCCESS) {
337 cs_error(link->handle, RequestIO, i);
338 goto failed;
339 }
340 CS_CHECK(RequestIRQ, pcmcia_request_irq(link->handle, &link->irq));
341 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link->handle, &link->conf));
342
343 dev->irq = link->irq.AssignedIRQ;
344 dev->base_addr = link->io.BasePort1;
345 ioaddr = dev->base_addr;
346 EL3WINDOW(0);
347
348 /* The 3c589 has an extra EEPROM for configuration info, including
349 the hardware address. The 3c562 puts the address in the CIS. */
350 tuple.DesiredTuple = 0x88;
351 if (pcmcia_get_first_tuple(handle, &tuple) == CS_SUCCESS) {
352 pcmcia_get_tuple_data(handle, &tuple);
353 for (i = 0; i < 3; i++)
354 phys_addr[i] = htons(buf[i]);
355 } else {
356 for (i = 0; i < 3; i++)
357 phys_addr[i] = htons(read_eeprom(ioaddr, i));
358 if (phys_addr[0] == 0x6060) {
359 printk(KERN_ERR "3c589_cs: IO port conflict at 0x%03lx"
360 "-0x%03lx\n", dev->base_addr, dev->base_addr+15);
361 goto failed;
362 }
363 }
364
365 /* The address and resource configuration register aren't loaded from
366 the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version. */
367 outw(0x3f00, ioaddr + 8);
368 fifo = inl(ioaddr);
369
370 /* The if_port symbol can be set when the module is loaded */
371 if ((if_port >= 0) && (if_port <= 3))
372 dev->if_port = if_port;
373 else
374 printk(KERN_ERR "3c589_cs: invalid if_port requested\n");
375
376 link->dev = &lp->node;
377 link->state &= ~DEV_CONFIG_PENDING;
378 SET_NETDEV_DEV(dev, &handle_to_dev(handle));
379
380 if (register_netdev(dev) != 0) {
381 printk(KERN_ERR "3c589_cs: register_netdev() failed\n");
382 link->dev = NULL;
383 goto failed;
384 }
385
386 strcpy(lp->node.dev_name, dev->name);
387
388 printk(KERN_INFO "%s: 3Com 3c%s, io %#3lx, irq %d, hw_addr ",
389 dev->name, (multi ? "562" : "589"), dev->base_addr,
390 dev->irq);
391 for (i = 0; i < 6; i++)
392 printk("%02X%s", dev->dev_addr[i], ((i<5) ? ":" : "\n"));
393 printk(KERN_INFO " %dK FIFO split %s Rx:Tx, %s xcvr\n",
394 (fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3],
395 if_names[dev->if_port]);
396 return;
397
398 cs_failed:
399 cs_error(link->handle, last_fn, last_ret);
400 failed:
401 tc589_release(link);
402 return;
403
404 } /* tc589_config */
405
406 /*======================================================================
407
408 After a card is removed, tc589_release() will unregister the net
409 device, and release the PCMCIA configuration. If the device is
410 still open, this will be postponed until it is closed.
411
412 ======================================================================*/
413
414 static void tc589_release(dev_link_t *link)
415 {
416 DEBUG(0, "3c589_release(0x%p)\n", link);
417
418 pcmcia_release_configuration(link->handle);
419 pcmcia_release_io(link->handle, &link->io);
420 pcmcia_release_irq(link->handle, &link->irq);
421
422 link->state &= ~DEV_CONFIG;
423 }
424
425 /*======================================================================
426
427 The card status event handler. Mostly, this schedules other
428 stuff to run after an event is received. A CARD_REMOVAL event
429 also sets some flags to discourage the net drivers from trying
430 to talk to the card any more.
431
432 ======================================================================*/
433
434 static int tc589_event(event_t event, int priority,
435 event_callback_args_t *args)
436 {
437 dev_link_t *link = args->client_data;
438 struct net_device *dev = link->priv;
439
440 DEBUG(1, "3c589_event(0x%06x)\n", event);
441
442 switch (event) {
443 case CS_EVENT_CARD_REMOVAL:
444 link->state &= ~DEV_PRESENT;
445 if (link->state & DEV_CONFIG)
446 netif_device_detach(dev);
447 break;
448 case CS_EVENT_CARD_INSERTION:
449 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
450 tc589_config(link);
451 break;
452 case CS_EVENT_PM_SUSPEND:
453 link->state |= DEV_SUSPEND;
454 /* Fall through... */
455 case CS_EVENT_RESET_PHYSICAL:
456 if (link->state & DEV_CONFIG) {
457 if (link->open)
458 netif_device_detach(dev);
459 pcmcia_release_configuration(link->handle);
460 }
461 break;
462 case CS_EVENT_PM_RESUME:
463 link->state &= ~DEV_SUSPEND;
464 /* Fall through... */
465 case CS_EVENT_CARD_RESET:
466 if (link->state & DEV_CONFIG) {
467 pcmcia_request_configuration(link->handle, &link->conf);
468 if (link->open) {
469 tc589_reset(dev);
470 netif_device_attach(dev);
471 }
472 }
473 break;
474 }
475 return 0;
476 } /* tc589_event */
477
478 /*====================================================================*/
479
480 /*
481 Use this for commands that may take time to finish
482 */
483 static void tc589_wait_for_completion(struct net_device *dev, int cmd)
484 {
485 int i = 100;
486 outw(cmd, dev->base_addr + EL3_CMD);
487 while (--i > 0)
488 if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break;
489 if (i == 0)
490 printk(KERN_WARNING "%s: command 0x%04x did not complete!\n",
491 dev->name, cmd);
492 }
493
494 /*
495 Read a word from the EEPROM using the regular EEPROM access register.
496 Assume that we are in register window zero.
497 */
498 static u16 read_eeprom(kio_addr_t ioaddr, int index)
499 {
500 int i;
501 outw(EEPROM_READ + index, ioaddr + 10);
502 /* Reading the eeprom takes 162 us */
503 for (i = 1620; i >= 0; i--)
504 if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
505 break;
506 return inw(ioaddr + 12);
507 }
508
509 /*
510 Set transceiver type, perhaps to something other than what the user
511 specified in dev->if_port.
512 */
513 static void tc589_set_xcvr(struct net_device *dev, int if_port)
514 {
515 struct el3_private *lp = netdev_priv(dev);
516 kio_addr_t ioaddr = dev->base_addr;
517
518 EL3WINDOW(0);
519 switch (if_port) {
520 case 0: case 1: outw(0, ioaddr + 6); break;
521 case 2: outw(3<<14, ioaddr + 6); break;
522 case 3: outw(1<<14, ioaddr + 6); break;
523 }
524 /* On PCMCIA, this just turns on the LED */
525 outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD);
526 /* 10baseT interface, enable link beat and jabber check. */
527 EL3WINDOW(4);
528 outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA);
529 EL3WINDOW(1);
530 if (if_port == 2)
531 lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000);
532 else
533 lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800);
534 }
535
536 static void dump_status(struct net_device *dev)
537 {
538 kio_addr_t ioaddr = dev->base_addr;
539 EL3WINDOW(1);
540 printk(KERN_INFO " irq status %04x, rx status %04x, tx status "
541 "%02x tx free %04x\n", inw(ioaddr+EL3_STATUS),
542 inw(ioaddr+RX_STATUS), inb(ioaddr+TX_STATUS),
543 inw(ioaddr+TX_FREE));
544 EL3WINDOW(4);
545 printk(KERN_INFO " diagnostics: fifo %04x net %04x ethernet %04x"
546 " media %04x\n", inw(ioaddr+0x04), inw(ioaddr+0x06),
547 inw(ioaddr+0x08), inw(ioaddr+0x0a));
548 EL3WINDOW(1);
549 }
550
551 /* Reset and restore all of the 3c589 registers. */
552 static void tc589_reset(struct net_device *dev)
553 {
554 kio_addr_t ioaddr = dev->base_addr;
555 int i;
556
557 EL3WINDOW(0);
558 outw(0x0001, ioaddr + 4); /* Activate board. */
559 outw(0x3f00, ioaddr + 8); /* Set the IRQ line. */
560
561 /* Set the station address in window 2. */
562 EL3WINDOW(2);
563 for (i = 0; i < 6; i++)
564 outb(dev->dev_addr[i], ioaddr + i);
565
566 tc589_set_xcvr(dev, dev->if_port);
567
568 /* Switch to the stats window, and clear all stats by reading. */
569 outw(StatsDisable, ioaddr + EL3_CMD);
570 EL3WINDOW(6);
571 for (i = 0; i < 9; i++)
572 inb(ioaddr+i);
573 inw(ioaddr + 10);
574 inw(ioaddr + 12);
575
576 /* Switch to register set 1 for normal use. */
577 EL3WINDOW(1);
578
579 /* Accept b-cast and phys addr only. */
580 outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD);
581 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
582 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
583 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
584 /* Allow status bits to be seen. */
585 outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
586 /* Ack all pending events, and set active indicator mask. */
587 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
588 ioaddr + EL3_CMD);
589 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
590 | AdapterFailure, ioaddr + EL3_CMD);
591 }
592
593 static void netdev_get_drvinfo(struct net_device *dev,
594 struct ethtool_drvinfo *info)
595 {
596 strcpy(info->driver, DRV_NAME);
597 strcpy(info->version, DRV_VERSION);
598 sprintf(info->bus_info, "PCMCIA 0x%lx", dev->base_addr);
599 }
600
601 #ifdef PCMCIA_DEBUG
602 static u32 netdev_get_msglevel(struct net_device *dev)
603 {
604 return pc_debug;
605 }
606
607 static void netdev_set_msglevel(struct net_device *dev, u32 level)
608 {
609 pc_debug = level;
610 }
611 #endif /* PCMCIA_DEBUG */
612
613 static struct ethtool_ops netdev_ethtool_ops = {
614 .get_drvinfo = netdev_get_drvinfo,
615 #ifdef PCMCIA_DEBUG
616 .get_msglevel = netdev_get_msglevel,
617 .set_msglevel = netdev_set_msglevel,
618 #endif /* PCMCIA_DEBUG */
619 };
620
621 static int el3_config(struct net_device *dev, struct ifmap *map)
622 {
623 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
624 if (map->port <= 3) {
625 dev->if_port = map->port;
626 printk(KERN_INFO "%s: switched to %s port\n",
627 dev->name, if_names[dev->if_port]);
628 tc589_set_xcvr(dev, dev->if_port);
629 } else
630 return -EINVAL;
631 }
632 return 0;
633 }
634
635 static int el3_open(struct net_device *dev)
636 {
637 struct el3_private *lp = netdev_priv(dev);
638 dev_link_t *link = &lp->link;
639
640 if (!DEV_OK(link))
641 return -ENODEV;
642
643 link->open++;
644 netif_start_queue(dev);
645
646 tc589_reset(dev);
647 init_timer(&lp->media);
648 lp->media.function = &media_check;
649 lp->media.data = (unsigned long) dev;
650 lp->media.expires = jiffies + HZ;
651 add_timer(&lp->media);
652
653 DEBUG(1, "%s: opened, status %4.4x.\n",
654 dev->name, inw(dev->base_addr + EL3_STATUS));
655
656 return 0;
657 }
658
659 static void el3_tx_timeout(struct net_device *dev)
660 {
661 struct el3_private *lp = netdev_priv(dev);
662 kio_addr_t ioaddr = dev->base_addr;
663
664 printk(KERN_WARNING "%s: Transmit timed out!\n", dev->name);
665 dump_status(dev);
666 lp->stats.tx_errors++;
667 dev->trans_start = jiffies;
668 /* Issue TX_RESET and TX_START commands. */
669 tc589_wait_for_completion(dev, TxReset);
670 outw(TxEnable, ioaddr + EL3_CMD);
671 netif_wake_queue(dev);
672 }
673
674 static void pop_tx_status(struct net_device *dev)
675 {
676 struct el3_private *lp = netdev_priv(dev);
677 kio_addr_t ioaddr = dev->base_addr;
678 int i;
679
680 /* Clear the Tx status stack. */
681 for (i = 32; i > 0; i--) {
682 u_char tx_status = inb(ioaddr + TX_STATUS);
683 if (!(tx_status & 0x84)) break;
684 /* reset transmitter on jabber error or underrun */
685 if (tx_status & 0x30)
686 tc589_wait_for_completion(dev, TxReset);
687 if (tx_status & 0x38) {
688 DEBUG(1, "%s: transmit error: status 0x%02x\n",
689 dev->name, tx_status);
690 outw(TxEnable, ioaddr + EL3_CMD);
691 lp->stats.tx_aborted_errors++;
692 }
693 outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
694 }
695 }
696
697 static int el3_start_xmit(struct sk_buff *skb, struct net_device *dev)
698 {
699 kio_addr_t ioaddr = dev->base_addr;
700 struct el3_private *priv = netdev_priv(dev);
701
702 DEBUG(3, "%s: el3_start_xmit(length = %ld) called, "
703 "status %4.4x.\n", dev->name, (long)skb->len,
704 inw(ioaddr + EL3_STATUS));
705
706 priv->stats.tx_bytes += skb->len;
707
708 /* Put out the doubleword header... */
709 outw(skb->len, ioaddr + TX_FIFO);
710 outw(0x00, ioaddr + TX_FIFO);
711 /* ... and the packet rounded to a doubleword. */
712 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
713
714 dev->trans_start = jiffies;
715 if (inw(ioaddr + TX_FREE) <= 1536) {
716 netif_stop_queue(dev);
717 /* Interrupt us when the FIFO has room for max-sized packet. */
718 outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
719 }
720
721 dev_kfree_skb(skb);
722 pop_tx_status(dev);
723
724 return 0;
725 }
726
727 /* The EL3 interrupt handler. */
728 static irqreturn_t el3_interrupt(int irq, void *dev_id, struct pt_regs *regs)
729 {
730 struct net_device *dev = (struct net_device *) dev_id;
731 struct el3_private *lp = netdev_priv(dev);
732 kio_addr_t ioaddr;
733 __u16 status;
734 int i = 0, handled = 1;
735
736 if (!netif_device_present(dev))
737 return IRQ_NONE;
738
739 ioaddr = dev->base_addr;
740
741 DEBUG(3, "%s: interrupt, status %4.4x.\n",
742 dev->name, inw(ioaddr + EL3_STATUS));
743
744 spin_lock(&lp->lock);
745 while ((status = inw(ioaddr + EL3_STATUS)) &
746 (IntLatch | RxComplete | StatsFull)) {
747 if ((status & 0xe000) != 0x2000) {
748 DEBUG(1, "%s: interrupt from dead card\n", dev->name);
749 handled = 0;
750 break;
751 }
752
753 if (status & RxComplete)
754 el3_rx(dev);
755
756 if (status & TxAvailable) {
757 DEBUG(3, " TX room bit was handled.\n");
758 /* There's room in the FIFO for a full-sized packet. */
759 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
760 netif_wake_queue(dev);
761 }
762
763 if (status & TxComplete)
764 pop_tx_status(dev);
765
766 if (status & (AdapterFailure | RxEarly | StatsFull)) {
767 /* Handle all uncommon interrupts. */
768 if (status & StatsFull) /* Empty statistics. */
769 update_stats(dev);
770 if (status & RxEarly) { /* Rx early is unused. */
771 el3_rx(dev);
772 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
773 }
774 if (status & AdapterFailure) {
775 u16 fifo_diag;
776 EL3WINDOW(4);
777 fifo_diag = inw(ioaddr + 4);
778 EL3WINDOW(1);
779 printk(KERN_WARNING "%s: adapter failure, FIFO diagnostic"
780 " register %04x.\n", dev->name, fifo_diag);
781 if (fifo_diag & 0x0400) {
782 /* Tx overrun */
783 tc589_wait_for_completion(dev, TxReset);
784 outw(TxEnable, ioaddr + EL3_CMD);
785 }
786 if (fifo_diag & 0x2000) {
787 /* Rx underrun */
788 tc589_wait_for_completion(dev, RxReset);
789 set_multicast_list(dev);
790 outw(RxEnable, ioaddr + EL3_CMD);
791 }
792 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
793 }
794 }
795
796 if (++i > 10) {
797 printk(KERN_ERR "%s: infinite loop in interrupt, "
798 "status %4.4x.\n", dev->name, status);
799 /* Clear all interrupts */
800 outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
801 break;
802 }
803 /* Acknowledge the IRQ. */
804 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
805 }
806
807 lp->last_irq = jiffies;
808 spin_unlock(&lp->lock);
809 DEBUG(3, "%s: exiting interrupt, status %4.4x.\n",
810 dev->name, inw(ioaddr + EL3_STATUS));
811 return IRQ_RETVAL(handled);
812 }
813
814 static void media_check(unsigned long arg)
815 {
816 struct net_device *dev = (struct net_device *)(arg);
817 struct el3_private *lp = netdev_priv(dev);
818 kio_addr_t ioaddr = dev->base_addr;
819 u16 media, errs;
820 unsigned long flags;
821
822 if (!netif_device_present(dev)) goto reschedule;
823
824 EL3WINDOW(1);
825 /* Check for pending interrupt with expired latency timer: with
826 this, we can limp along even if the interrupt is blocked */
827 if ((inw(ioaddr + EL3_STATUS) & IntLatch) &&
828 (inb(ioaddr + EL3_TIMER) == 0xff)) {
829 if (!lp->fast_poll)
830 printk(KERN_WARNING "%s: interrupt(s) dropped!\n", dev->name);
831 el3_interrupt(dev->irq, lp, NULL);
832 lp->fast_poll = HZ;
833 }
834 if (lp->fast_poll) {
835 lp->fast_poll--;
836 lp->media.expires = jiffies + HZ/100;
837 add_timer(&lp->media);
838 return;
839 }
840
841 /* lp->lock guards the EL3 window. Window should always be 1 except
842 when the lock is held */
843 spin_lock_irqsave(&lp->lock, flags);
844 EL3WINDOW(4);
845 media = inw(ioaddr+WN4_MEDIA) & 0xc810;
846
847 /* Ignore collisions unless we've had no irq's recently */
848 if (jiffies - lp->last_irq < HZ) {
849 media &= ~0x0010;
850 } else {
851 /* Try harder to detect carrier errors */
852 EL3WINDOW(6);
853 outw(StatsDisable, ioaddr + EL3_CMD);
854 errs = inb(ioaddr + 0);
855 outw(StatsEnable, ioaddr + EL3_CMD);
856 lp->stats.tx_carrier_errors += errs;
857 if (errs || (lp->media_status & 0x0010)) media |= 0x0010;
858 }
859
860 if (media != lp->media_status) {
861 if ((media & lp->media_status & 0x8000) &&
862 ((lp->media_status ^ media) & 0x0800))
863 printk(KERN_INFO "%s: %s link beat\n", dev->name,
864 (lp->media_status & 0x0800 ? "lost" : "found"));
865 else if ((media & lp->media_status & 0x4000) &&
866 ((lp->media_status ^ media) & 0x0010))
867 printk(KERN_INFO "%s: coax cable %s\n", dev->name,
868 (lp->media_status & 0x0010 ? "ok" : "problem"));
869 if (dev->if_port == 0) {
870 if (media & 0x8000) {
871 if (media & 0x0800)
872 printk(KERN_INFO "%s: flipped to 10baseT\n",
873 dev->name);
874 else
875 tc589_set_xcvr(dev, 2);
876 } else if (media & 0x4000) {
877 if (media & 0x0010)
878 tc589_set_xcvr(dev, 1);
879 else
880 printk(KERN_INFO "%s: flipped to 10base2\n",
881 dev->name);
882 }
883 }
884 lp->media_status = media;
885 }
886
887 EL3WINDOW(1);
888 spin_unlock_irqrestore(&lp->lock, flags);
889
890 reschedule:
891 lp->media.expires = jiffies + HZ;
892 add_timer(&lp->media);
893 }
894
895 static struct net_device_stats *el3_get_stats(struct net_device *dev)
896 {
897 struct el3_private *lp = netdev_priv(dev);
898 unsigned long flags;
899 dev_link_t *link = &lp->link;
900
901 if (DEV_OK(link)) {
902 spin_lock_irqsave(&lp->lock, flags);
903 update_stats(dev);
904 spin_unlock_irqrestore(&lp->lock, flags);
905 }
906 return &lp->stats;
907 }
908
909 /*
910 Update statistics. We change to register window 6, so this should be run
911 single-threaded if the device is active. This is expected to be a rare
912 operation, and it's simpler for the rest of the driver to assume that
913 window 1 is always valid rather than use a special window-state variable.
914
915 Caller must hold the lock for this
916 */
917 static void update_stats(struct net_device *dev)
918 {
919 struct el3_private *lp = netdev_priv(dev);
920 kio_addr_t ioaddr = dev->base_addr;
921
922 DEBUG(2, "%s: updating the statistics.\n", dev->name);
923 /* Turn off statistics updates while reading. */
924 outw(StatsDisable, ioaddr + EL3_CMD);
925 /* Switch to the stats window, and read everything. */
926 EL3WINDOW(6);
927 lp->stats.tx_carrier_errors += inb(ioaddr + 0);
928 lp->stats.tx_heartbeat_errors += inb(ioaddr + 1);
929 /* Multiple collisions. */ inb(ioaddr + 2);
930 lp->stats.collisions += inb(ioaddr + 3);
931 lp->stats.tx_window_errors += inb(ioaddr + 4);
932 lp->stats.rx_fifo_errors += inb(ioaddr + 5);
933 lp->stats.tx_packets += inb(ioaddr + 6);
934 /* Rx packets */ inb(ioaddr + 7);
935 /* Tx deferrals */ inb(ioaddr + 8);
936 /* Rx octets */ inw(ioaddr + 10);
937 /* Tx octets */ inw(ioaddr + 12);
938
939 /* Back to window 1, and turn statistics back on. */
940 EL3WINDOW(1);
941 outw(StatsEnable, ioaddr + EL3_CMD);
942 }
943
944 static int el3_rx(struct net_device *dev)
945 {
946 struct el3_private *lp = netdev_priv(dev);
947 kio_addr_t ioaddr = dev->base_addr;
948 int worklimit = 32;
949 short rx_status;
950
951 DEBUG(3, "%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n",
952 dev->name, inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
953 while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
954 (--worklimit >= 0)) {
955 if (rx_status & 0x4000) { /* Error, update stats. */
956 short error = rx_status & 0x3800;
957 lp->stats.rx_errors++;
958 switch (error) {
959 case 0x0000: lp->stats.rx_over_errors++; break;
960 case 0x0800: lp->stats.rx_length_errors++; break;
961 case 0x1000: lp->stats.rx_frame_errors++; break;
962 case 0x1800: lp->stats.rx_length_errors++; break;
963 case 0x2000: lp->stats.rx_frame_errors++; break;
964 case 0x2800: lp->stats.rx_crc_errors++; break;
965 }
966 } else {
967 short pkt_len = rx_status & 0x7ff;
968 struct sk_buff *skb;
969
970 skb = dev_alloc_skb(pkt_len+5);
971
972 DEBUG(3, " Receiving packet size %d status %4.4x.\n",
973 pkt_len, rx_status);
974 if (skb != NULL) {
975 skb->dev = dev;
976 skb_reserve(skb, 2);
977 insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
978 (pkt_len+3)>>2);
979 skb->protocol = eth_type_trans(skb, dev);
980 netif_rx(skb);
981 dev->last_rx = jiffies;
982 lp->stats.rx_packets++;
983 lp->stats.rx_bytes += pkt_len;
984 } else {
985 DEBUG(1, "%s: couldn't allocate a sk_buff of"
986 " size %d.\n", dev->name, pkt_len);
987 lp->stats.rx_dropped++;
988 }
989 }
990 /* Pop the top of the Rx FIFO */
991 tc589_wait_for_completion(dev, RxDiscard);
992 }
993 if (worklimit == 0)
994 printk(KERN_WARNING "%s: too much work in el3_rx!\n", dev->name);
995 return 0;
996 }
997
998 static void set_multicast_list(struct net_device *dev)
999 {
1000 struct el3_private *lp = netdev_priv(dev);
1001 dev_link_t *link = &lp->link;
1002 kio_addr_t ioaddr = dev->base_addr;
1003 u16 opts = SetRxFilter | RxStation | RxBroadcast;
1004
1005 if (!(DEV_OK(link))) return;
1006 if (dev->flags & IFF_PROMISC)
1007 opts |= RxMulticast | RxProm;
1008 else if (dev->mc_count || (dev->flags & IFF_ALLMULTI))
1009 opts |= RxMulticast;
1010 outw(opts, ioaddr + EL3_CMD);
1011 }
1012
1013 static int el3_close(struct net_device *dev)
1014 {
1015 struct el3_private *lp = netdev_priv(dev);
1016 dev_link_t *link = &lp->link;
1017 kio_addr_t ioaddr = dev->base_addr;
1018
1019 DEBUG(1, "%s: shutting down ethercard.\n", dev->name);
1020
1021 if (DEV_OK(link)) {
1022 /* Turn off statistics ASAP. We update lp->stats below. */
1023 outw(StatsDisable, ioaddr + EL3_CMD);
1024
1025 /* Disable the receiver and transmitter. */
1026 outw(RxDisable, ioaddr + EL3_CMD);
1027 outw(TxDisable, ioaddr + EL3_CMD);
1028
1029 if (dev->if_port == 2)
1030 /* Turn off thinnet power. Green! */
1031 outw(StopCoax, ioaddr + EL3_CMD);
1032 else if (dev->if_port == 1) {
1033 /* Disable link beat and jabber */
1034 EL3WINDOW(4);
1035 outw(0, ioaddr + WN4_MEDIA);
1036 }
1037
1038 /* Switching back to window 0 disables the IRQ. */
1039 EL3WINDOW(0);
1040 /* But we explicitly zero the IRQ line select anyway. */
1041 outw(0x0f00, ioaddr + WN0_IRQ);
1042
1043 /* Check if the card still exists */
1044 if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000)
1045 update_stats(dev);
1046 }
1047
1048 link->open--;
1049 netif_stop_queue(dev);
1050 del_timer_sync(&lp->media);
1051
1052 return 0;
1053 }
1054
1055 static struct pcmcia_device_id tc589_ids[] = {
1056 PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562),
1057 PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77),
1058 PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589),
1059 PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202),
1060 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "3CXEM556.cis"),
1061 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "3CXEM556.cis"),
1062 PCMCIA_DEVICE_NULL,
1063 };
1064 MODULE_DEVICE_TABLE(pcmcia, tc589_ids);
1065
1066 static struct pcmcia_driver tc589_driver = {
1067 .owner = THIS_MODULE,
1068 .drv = {
1069 .name = "3c589_cs",
1070 },
1071 .attach = tc589_attach,
1072 .event = tc589_event,
1073 .detach = tc589_detach,
1074 .id_table = tc589_ids,
1075 };
1076
1077 static int __init init_tc589(void)
1078 {
1079 return pcmcia_register_driver(&tc589_driver);
1080 }
1081
1082 static void __exit exit_tc589(void)
1083 {
1084 pcmcia_unregister_driver(&tc589_driver);
1085 BUG_ON(dev_list != NULL);
1086 }
1087
1088 module_init(init_tc589);
1089 module_exit(exit_tc589);