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Linux 2.6.17.7
[linux/fpc-iii.git] / drivers / net / pcmcia / 3c589_cs.c
blob875a0fe251e7bfab9ef409893a9216835855d992
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 #include <linux/jiffies.h>
43
44 #include <pcmcia/cs_types.h>
45 #include <pcmcia/cs.h>
46 #include <pcmcia/cistpl.h>
47 #include <pcmcia/cisreg.h>
48 #include <pcmcia/ciscode.h>
49 #include <pcmcia/ds.h>
50
51 #include <asm/uaccess.h>
52 #include <asm/io.h>
53 #include <asm/system.h>
54
55 /* To minimize the size of the driver source I only define operating
56 constants if they are used several times. You'll need the manual
57 if you want to understand driver details. */
58 /* Offsets from base I/O address. */
59 #define EL3_DATA 0x00
60 #define EL3_TIMER 0x0a
61 #define EL3_CMD 0x0e
62 #define EL3_STATUS 0x0e
63
64 #define EEPROM_READ 0x0080
65 #define EEPROM_BUSY 0x8000
66
67 #define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
68
69 /* The top five bits written to EL3_CMD are a command, the lower
70 11 bits are the parameter, if applicable. */
71 enum c509cmd {
72 TotalReset = 0<<11, 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 struct pcmcia_device *p_dev;
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 const 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 int tc589_config(struct pcmcia_device *link);
146 static void tc589_release(struct pcmcia_device *link);
147
148 static u16 read_eeprom(kio_addr_t ioaddr, int index);
149 static void tc589_reset(struct net_device *dev);
150 static void media_check(unsigned long arg);
151 static int el3_config(struct net_device *dev, struct ifmap *map);
152 static int el3_open(struct net_device *dev);
153 static int el3_start_xmit(struct sk_buff *skb, struct net_device *dev);
154 static irqreturn_t el3_interrupt(int irq, void *dev_id, struct pt_regs *regs);
155 static void update_stats(struct net_device *dev);
156 static struct net_device_stats *el3_get_stats(struct net_device *dev);
157 static int el3_rx(struct net_device *dev);
158 static int el3_close(struct net_device *dev);
159 static void el3_tx_timeout(struct net_device *dev);
160 static void set_multicast_list(struct net_device *dev);
161 static struct ethtool_ops netdev_ethtool_ops;
162
163 static void tc589_detach(struct pcmcia_device *p_dev);
164
165 /*======================================================================
166
167 tc589_attach() creates an "instance" of the driver, allocating
168 local data structures for one device. The device is registered
169 with Card Services.
170
171 ======================================================================*/
172
173 static int tc589_probe(struct pcmcia_device *link)
174 {
175 struct el3_private *lp;
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->priv = dev;
186 lp->p_dev = link;
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.IntType = INT_MEMORY_AND_IO;
197 link->conf.ConfigIndex = 1;
198 link->conf.Present = PRESENT_OPTION;
199
200 /* The EL3-specific entries in the device structure. */
201 SET_MODULE_OWNER(dev);
202 dev->hard_start_xmit = &el3_start_xmit;
203 dev->set_config = &el3_config;
204 dev->get_stats = &el3_get_stats;
205 dev->set_multicast_list = &set_multicast_list;
206 dev->open = &el3_open;
207 dev->stop = &el3_close;
208 #ifdef HAVE_TX_TIMEOUT
209 dev->tx_timeout = el3_tx_timeout;
210 dev->watchdog_timeo = TX_TIMEOUT;
211 #endif
212 SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
213
214 return tc589_config(link);
215 } /* tc589_attach */
216
217 /*======================================================================
218
219 This deletes a driver "instance". The device is de-registered
220 with Card Services. If it has been released, all local data
221 structures are freed. Otherwise, the structures will be freed
222 when the device is released.
223
224 ======================================================================*/
225
226 static void tc589_detach(struct pcmcia_device *link)
227 {
228 struct net_device *dev = link->priv;
229
230 DEBUG(0, "3c589_detach(0x%p)\n", link);
231
232 if (link->dev_node)
233 unregister_netdev(dev);
234
235 tc589_release(link);
236
237 free_netdev(dev);
238 } /* tc589_detach */
239
240 /*======================================================================
241
242 tc589_config() is scheduled to run after a CARD_INSERTION event
243 is received, to configure the PCMCIA socket, and to make the
244 ethernet device available to the system.
245
246 ======================================================================*/
247
248 #define CS_CHECK(fn, ret) \
249 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
250
251 static int tc589_config(struct pcmcia_device *link)
252 {
253 struct net_device *dev = link->priv;
254 struct el3_private *lp = netdev_priv(dev);
255 tuple_t tuple;
256 cisparse_t parse;
257 u16 buf[32], *phys_addr;
258 int last_fn, last_ret, i, j, multi = 0, fifo;
259 kio_addr_t ioaddr;
260 char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
261
262 DEBUG(0, "3c589_config(0x%p)\n", link);
263
264 phys_addr = (u16 *)dev->dev_addr;
265 tuple.Attributes = 0;
266 tuple.DesiredTuple = CISTPL_CONFIG;
267 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
268 tuple.TupleData = (cisdata_t *)buf;
269 tuple.TupleDataMax = sizeof(buf);
270 tuple.TupleOffset = 0;
271 CS_CHECK(GetTupleData, pcmcia_get_tuple_data(link, &tuple));
272 CS_CHECK(ParseTuple, pcmcia_parse_tuple(link, &tuple, &parse));
273 link->conf.ConfigBase = parse.config.base;
274 link->conf.Present = parse.config.rmask[0];
275
276 /* Is this a 3c562? */
277 tuple.DesiredTuple = CISTPL_MANFID;
278 tuple.Attributes = TUPLE_RETURN_COMMON;
279 if ((pcmcia_get_first_tuple(link, &tuple) == CS_SUCCESS) &&
280 (pcmcia_get_tuple_data(link, &tuple) == CS_SUCCESS)) {
281 if (le16_to_cpu(buf[0]) != MANFID_3COM)
282 printk(KERN_INFO "3c589_cs: hmmm, is this really a "
283 "3Com card??\n");
284 multi = (le16_to_cpu(buf[1]) == PRODID_3COM_3C562);
285 }
286
287 /* For the 3c562, the base address must be xx00-xx7f */
288 link->io.IOAddrLines = 16;
289 for (i = j = 0; j < 0x400; j += 0x10) {
290 if (multi && (j & 0x80)) continue;
291 link->io.BasePort1 = j ^ 0x300;
292 i = pcmcia_request_io(link, &link->io);
293 if (i == CS_SUCCESS) break;
294 }
295 if (i != CS_SUCCESS) {
296 cs_error(link, RequestIO, i);
297 goto failed;
298 }
299 CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
300 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
301
302 dev->irq = link->irq.AssignedIRQ;
303 dev->base_addr = link->io.BasePort1;
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 tuple.DesiredTuple = 0x88;
310 if (pcmcia_get_first_tuple(link, &tuple) == CS_SUCCESS) {
311 pcmcia_get_tuple_data(link, &tuple);
312 for (i = 0; i < 3; i++)
313 phys_addr[i] = htons(buf[i]);
314 } else {
315 for (i = 0; i < 3; i++)
316 phys_addr[i] = htons(read_eeprom(ioaddr, i));
317 if (phys_addr[0] == 0x6060) {
318 printk(KERN_ERR "3c589_cs: IO port conflict at 0x%03lx"
319 "-0x%03lx\n", dev->base_addr, dev->base_addr+15);
320 goto failed;
321 }
322 }
323
324 /* The address and resource configuration register aren't loaded from
325 the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version. */
326 outw(0x3f00, ioaddr + 8);
327 fifo = inl(ioaddr);
328
329 /* The if_port symbol can be set when the module is loaded */
330 if ((if_port >= 0) && (if_port <= 3))
331 dev->if_port = if_port;
332 else
333 printk(KERN_ERR "3c589_cs: invalid if_port requested\n");
334
335 link->dev_node = &lp->node;
336 SET_NETDEV_DEV(dev, &handle_to_dev(link));
337
338 if (register_netdev(dev) != 0) {
339 printk(KERN_ERR "3c589_cs: register_netdev() failed\n");
340 link->dev_node = NULL;
341 goto failed;
342 }
343
344 strcpy(lp->node.dev_name, dev->name);
345
346 printk(KERN_INFO "%s: 3Com 3c%s, io %#3lx, irq %d, hw_addr ",
347 dev->name, (multi ? "562" : "589"), dev->base_addr,
348 dev->irq);
349 for (i = 0; i < 6; i++)
350 printk("%02X%s", dev->dev_addr[i], ((i<5) ? ":" : "\n"));
351 printk(KERN_INFO " %dK FIFO split %s Rx:Tx, %s xcvr\n",
352 (fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3],
353 if_names[dev->if_port]);
354 return 0;
355
356 cs_failed:
357 cs_error(link, last_fn, last_ret);
358 failed:
359 tc589_release(link);
360 return -ENODEV;
361 } /* tc589_config */
362
363 /*======================================================================
364
365 After a card is removed, tc589_release() will unregister the net
366 device, and release the PCMCIA configuration. If the device is
367 still open, this will be postponed until it is closed.
368
369 ======================================================================*/
370
371 static void tc589_release(struct pcmcia_device *link)
372 {
373 pcmcia_disable_device(link);
374 }
375
376 static int tc589_suspend(struct pcmcia_device *link)
377 {
378 struct net_device *dev = link->priv;
379
380 if (link->open)
381 netif_device_detach(dev);
382
383 return 0;
384 }
385
386 static int tc589_resume(struct pcmcia_device *link)
387 {
388 struct net_device *dev = link->priv;
389
390 if (link->open) {
391 tc589_reset(dev);
392 netif_device_attach(dev);
393 }
394
395 return 0;
396 }
397
398 /*====================================================================*/
399
400 /*
401 Use this for commands that may take time to finish
402 */
403 static void tc589_wait_for_completion(struct net_device *dev, int cmd)
404 {
405 int i = 100;
406 outw(cmd, dev->base_addr + EL3_CMD);
407 while (--i > 0)
408 if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break;
409 if (i == 0)
410 printk(KERN_WARNING "%s: command 0x%04x did not complete!\n",
411 dev->name, cmd);
412 }
413
414 /*
415 Read a word from the EEPROM using the regular EEPROM access register.
416 Assume that we are in register window zero.
417 */
418 static u16 read_eeprom(kio_addr_t ioaddr, int index)
419 {
420 int i;
421 outw(EEPROM_READ + index, ioaddr + 10);
422 /* Reading the eeprom takes 162 us */
423 for (i = 1620; i >= 0; i--)
424 if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
425 break;
426 return inw(ioaddr + 12);
427 }
428
429 /*
430 Set transceiver type, perhaps to something other than what the user
431 specified in dev->if_port.
432 */
433 static void tc589_set_xcvr(struct net_device *dev, int if_port)
434 {
435 struct el3_private *lp = netdev_priv(dev);
436 kio_addr_t ioaddr = dev->base_addr;
437
438 EL3WINDOW(0);
439 switch (if_port) {
440 case 0: case 1: outw(0, ioaddr + 6); break;
441 case 2: outw(3<<14, ioaddr + 6); break;
442 case 3: outw(1<<14, ioaddr + 6); break;
443 }
444 /* On PCMCIA, this just turns on the LED */
445 outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD);
446 /* 10baseT interface, enable link beat and jabber check. */
447 EL3WINDOW(4);
448 outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA);
449 EL3WINDOW(1);
450 if (if_port == 2)
451 lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000);
452 else
453 lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800);
454 }
455
456 static void dump_status(struct net_device *dev)
457 {
458 kio_addr_t ioaddr = dev->base_addr;
459 EL3WINDOW(1);
460 printk(KERN_INFO " irq status %04x, rx status %04x, tx status "
461 "%02x tx free %04x\n", inw(ioaddr+EL3_STATUS),
462 inw(ioaddr+RX_STATUS), inb(ioaddr+TX_STATUS),
463 inw(ioaddr+TX_FREE));
464 EL3WINDOW(4);
465 printk(KERN_INFO " diagnostics: fifo %04x net %04x ethernet %04x"
466 " media %04x\n", inw(ioaddr+0x04), inw(ioaddr+0x06),
467 inw(ioaddr+0x08), inw(ioaddr+0x0a));
468 EL3WINDOW(1);
469 }
470
471 /* Reset and restore all of the 3c589 registers. */
472 static void tc589_reset(struct net_device *dev)
473 {
474 kio_addr_t ioaddr = dev->base_addr;
475 int i;
476
477 EL3WINDOW(0);
478 outw(0x0001, ioaddr + 4); /* Activate board. */
479 outw(0x3f00, ioaddr + 8); /* Set the IRQ line. */
480
481 /* Set the station address in window 2. */
482 EL3WINDOW(2);
483 for (i = 0; i < 6; i++)
484 outb(dev->dev_addr[i], ioaddr + i);
485
486 tc589_set_xcvr(dev, dev->if_port);
487
488 /* Switch to the stats window, and clear all stats by reading. */
489 outw(StatsDisable, ioaddr + EL3_CMD);
490 EL3WINDOW(6);
491 for (i = 0; i < 9; i++)
492 inb(ioaddr+i);
493 inw(ioaddr + 10);
494 inw(ioaddr + 12);
495
496 /* Switch to register set 1 for normal use. */
497 EL3WINDOW(1);
498
499 /* Accept b-cast and phys addr only. */
500 outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD);
501 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
502 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
503 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
504 /* Allow status bits to be seen. */
505 outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
506 /* Ack all pending events, and set active indicator mask. */
507 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
508 ioaddr + EL3_CMD);
509 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
510 | AdapterFailure, ioaddr + EL3_CMD);
511 }
512
513 static void netdev_get_drvinfo(struct net_device *dev,
514 struct ethtool_drvinfo *info)
515 {
516 strcpy(info->driver, DRV_NAME);
517 strcpy(info->version, DRV_VERSION);
518 sprintf(info->bus_info, "PCMCIA 0x%lx", dev->base_addr);
519 }
520
521 #ifdef PCMCIA_DEBUG
522 static u32 netdev_get_msglevel(struct net_device *dev)
523 {
524 return pc_debug;
525 }
526
527 static void netdev_set_msglevel(struct net_device *dev, u32 level)
528 {
529 pc_debug = level;
530 }
531 #endif /* PCMCIA_DEBUG */
532
533 static struct ethtool_ops netdev_ethtool_ops = {
534 .get_drvinfo = netdev_get_drvinfo,
535 #ifdef PCMCIA_DEBUG
536 .get_msglevel = netdev_get_msglevel,
537 .set_msglevel = netdev_set_msglevel,
538 #endif /* PCMCIA_DEBUG */
539 };
540
541 static int el3_config(struct net_device *dev, struct ifmap *map)
542 {
543 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
544 if (map->port <= 3) {
545 dev->if_port = map->port;
546 printk(KERN_INFO "%s: switched to %s port\n",
547 dev->name, if_names[dev->if_port]);
548 tc589_set_xcvr(dev, dev->if_port);
549 } else
550 return -EINVAL;
551 }
552 return 0;
553 }
554
555 static int el3_open(struct net_device *dev)
556 {
557 struct el3_private *lp = netdev_priv(dev);
558 struct pcmcia_device *link = lp->p_dev;
559
560 if (!pcmcia_dev_present(link))
561 return -ENODEV;
562
563 link->open++;
564 netif_start_queue(dev);
565
566 tc589_reset(dev);
567 init_timer(&lp->media);
568 lp->media.function = &media_check;
569 lp->media.data = (unsigned long) dev;
570 lp->media.expires = jiffies + HZ;
571 add_timer(&lp->media);
572
573 DEBUG(1, "%s: opened, status %4.4x.\n",
574 dev->name, inw(dev->base_addr + EL3_STATUS));
575
576 return 0;
577 }
578
579 static void el3_tx_timeout(struct net_device *dev)
580 {
581 struct el3_private *lp = netdev_priv(dev);
582 kio_addr_t ioaddr = dev->base_addr;
583
584 printk(KERN_WARNING "%s: Transmit timed out!\n", dev->name);
585 dump_status(dev);
586 lp->stats.tx_errors++;
587 dev->trans_start = jiffies;
588 /* Issue TX_RESET and TX_START commands. */
589 tc589_wait_for_completion(dev, TxReset);
590 outw(TxEnable, ioaddr + EL3_CMD);
591 netif_wake_queue(dev);
592 }
593
594 static void pop_tx_status(struct net_device *dev)
595 {
596 struct el3_private *lp = netdev_priv(dev);
597 kio_addr_t ioaddr = dev->base_addr;
598 int i;
599
600 /* Clear the Tx status stack. */
601 for (i = 32; i > 0; i--) {
602 u_char tx_status = inb(ioaddr + TX_STATUS);
603 if (!(tx_status & 0x84)) break;
604 /* reset transmitter on jabber error or underrun */
605 if (tx_status & 0x30)
606 tc589_wait_for_completion(dev, TxReset);
607 if (tx_status & 0x38) {
608 DEBUG(1, "%s: transmit error: status 0x%02x\n",
609 dev->name, tx_status);
610 outw(TxEnable, ioaddr + EL3_CMD);
611 lp->stats.tx_aborted_errors++;
612 }
613 outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
614 }
615 }
616
617 static int el3_start_xmit(struct sk_buff *skb, struct net_device *dev)
618 {
619 kio_addr_t ioaddr = dev->base_addr;
620 struct el3_private *priv = netdev_priv(dev);
621
622 DEBUG(3, "%s: el3_start_xmit(length = %ld) called, "
623 "status %4.4x.\n", dev->name, (long)skb->len,
624 inw(ioaddr + EL3_STATUS));
625
626 priv->stats.tx_bytes += skb->len;
627
628 /* Put out the doubleword header... */
629 outw(skb->len, ioaddr + TX_FIFO);
630 outw(0x00, ioaddr + TX_FIFO);
631 /* ... and the packet rounded to a doubleword. */
632 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
633
634 dev->trans_start = jiffies;
635 if (inw(ioaddr + TX_FREE) <= 1536) {
636 netif_stop_queue(dev);
637 /* Interrupt us when the FIFO has room for max-sized packet. */
638 outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
639 }
640
641 dev_kfree_skb(skb);
642 pop_tx_status(dev);
643
644 return 0;
645 }
646
647 /* The EL3 interrupt handler. */
648 static irqreturn_t el3_interrupt(int irq, void *dev_id, struct pt_regs *regs)
649 {
650 struct net_device *dev = (struct net_device *) dev_id;
651 struct el3_private *lp = netdev_priv(dev);
652 kio_addr_t ioaddr;
653 __u16 status;
654 int i = 0, handled = 1;
655
656 if (!netif_device_present(dev))
657 return IRQ_NONE;
658
659 ioaddr = dev->base_addr;
660
661 DEBUG(3, "%s: interrupt, status %4.4x.\n",
662 dev->name, inw(ioaddr + EL3_STATUS));
663
664 spin_lock(&lp->lock);
665 while ((status = inw(ioaddr + EL3_STATUS)) &
666 (IntLatch | RxComplete | StatsFull)) {
667 if ((status & 0xe000) != 0x2000) {
668 DEBUG(1, "%s: interrupt from dead card\n", dev->name);
669 handled = 0;
670 break;
671 }
672
673 if (status & RxComplete)
674 el3_rx(dev);
675
676 if (status & TxAvailable) {
677 DEBUG(3, " TX room bit was handled.\n");
678 /* There's room in the FIFO for a full-sized packet. */
679 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
680 netif_wake_queue(dev);
681 }
682
683 if (status & TxComplete)
684 pop_tx_status(dev);
685
686 if (status & (AdapterFailure | RxEarly | StatsFull)) {
687 /* Handle all uncommon interrupts. */
688 if (status & StatsFull) /* Empty statistics. */
689 update_stats(dev);
690 if (status & RxEarly) { /* Rx early is unused. */
691 el3_rx(dev);
692 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
693 }
694 if (status & AdapterFailure) {
695 u16 fifo_diag;
696 EL3WINDOW(4);
697 fifo_diag = inw(ioaddr + 4);
698 EL3WINDOW(1);
699 printk(KERN_WARNING "%s: adapter failure, FIFO diagnostic"
700 " register %04x.\n", dev->name, fifo_diag);
701 if (fifo_diag & 0x0400) {
702 /* Tx overrun */
703 tc589_wait_for_completion(dev, TxReset);
704 outw(TxEnable, ioaddr + EL3_CMD);
705 }
706 if (fifo_diag & 0x2000) {
707 /* Rx underrun */
708 tc589_wait_for_completion(dev, RxReset);
709 set_multicast_list(dev);
710 outw(RxEnable, ioaddr + EL3_CMD);
711 }
712 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
713 }
714 }
715
716 if (++i > 10) {
717 printk(KERN_ERR "%s: infinite loop in interrupt, "
718 "status %4.4x.\n", dev->name, status);
719 /* Clear all interrupts */
720 outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
721 break;
722 }
723 /* Acknowledge the IRQ. */
724 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
725 }
726
727 lp->last_irq = jiffies;
728 spin_unlock(&lp->lock);
729 DEBUG(3, "%s: exiting interrupt, status %4.4x.\n",
730 dev->name, inw(ioaddr + EL3_STATUS));
731 return IRQ_RETVAL(handled);
732 }
733
734 static void media_check(unsigned long arg)
735 {
736 struct net_device *dev = (struct net_device *)(arg);
737 struct el3_private *lp = netdev_priv(dev);
738 kio_addr_t ioaddr = dev->base_addr;
739 u16 media, errs;
740 unsigned long flags;
741
742 if (!netif_device_present(dev)) goto reschedule;
743
744 EL3WINDOW(1);
745 /* Check for pending interrupt with expired latency timer: with
746 this, we can limp along even if the interrupt is blocked */
747 if ((inw(ioaddr + EL3_STATUS) & IntLatch) &&
748 (inb(ioaddr + EL3_TIMER) == 0xff)) {
749 if (!lp->fast_poll)
750 printk(KERN_WARNING "%s: interrupt(s) dropped!\n", dev->name);
751 el3_interrupt(dev->irq, lp, NULL);
752 lp->fast_poll = HZ;
753 }
754 if (lp->fast_poll) {
755 lp->fast_poll--;
756 lp->media.expires = jiffies + HZ/100;
757 add_timer(&lp->media);
758 return;
759 }
760
761 /* lp->lock guards the EL3 window. Window should always be 1 except
762 when the lock is held */
763 spin_lock_irqsave(&lp->lock, flags);
764 EL3WINDOW(4);
765 media = inw(ioaddr+WN4_MEDIA) & 0xc810;
766
767 /* Ignore collisions unless we've had no irq's recently */
768 if (time_before(jiffies, lp->last_irq + HZ)) {
769 media &= ~0x0010;
770 } else {
771 /* Try harder to detect carrier errors */
772 EL3WINDOW(6);
773 outw(StatsDisable, ioaddr + EL3_CMD);
774 errs = inb(ioaddr + 0);
775 outw(StatsEnable, ioaddr + EL3_CMD);
776 lp->stats.tx_carrier_errors += errs;
777 if (errs || (lp->media_status & 0x0010)) media |= 0x0010;
778 }
779
780 if (media != lp->media_status) {
781 if ((media & lp->media_status & 0x8000) &&
782 ((lp->media_status ^ media) & 0x0800))
783 printk(KERN_INFO "%s: %s link beat\n", dev->name,
784 (lp->media_status & 0x0800 ? "lost" : "found"));
785 else if ((media & lp->media_status & 0x4000) &&
786 ((lp->media_status ^ media) & 0x0010))
787 printk(KERN_INFO "%s: coax cable %s\n", dev->name,
788 (lp->media_status & 0x0010 ? "ok" : "problem"));
789 if (dev->if_port == 0) {
790 if (media & 0x8000) {
791 if (media & 0x0800)
792 printk(KERN_INFO "%s: flipped to 10baseT\n",
793 dev->name);
794 else
795 tc589_set_xcvr(dev, 2);
796 } else if (media & 0x4000) {
797 if (media & 0x0010)
798 tc589_set_xcvr(dev, 1);
799 else
800 printk(KERN_INFO "%s: flipped to 10base2\n",
801 dev->name);
802 }
803 }
804 lp->media_status = media;
805 }
806
807 EL3WINDOW(1);
808 spin_unlock_irqrestore(&lp->lock, flags);
809
810 reschedule:
811 lp->media.expires = jiffies + HZ;
812 add_timer(&lp->media);
813 }
814
815 static struct net_device_stats *el3_get_stats(struct net_device *dev)
816 {
817 struct el3_private *lp = netdev_priv(dev);
818 unsigned long flags;
819 struct pcmcia_device *link = lp->p_dev;
820
821 if (pcmcia_dev_present(link)) {
822 spin_lock_irqsave(&lp->lock, flags);
823 update_stats(dev);
824 spin_unlock_irqrestore(&lp->lock, flags);
825 }
826 return &lp->stats;
827 }
828
829 /*
830 Update statistics. We change to register window 6, so this should be run
831 single-threaded if the device is active. This is expected to be a rare
832 operation, and it's simpler for the rest of the driver to assume that
833 window 1 is always valid rather than use a special window-state variable.
834
835 Caller must hold the lock for this
836 */
837 static void update_stats(struct net_device *dev)
838 {
839 struct el3_private *lp = netdev_priv(dev);
840 kio_addr_t ioaddr = dev->base_addr;
841
842 DEBUG(2, "%s: updating the statistics.\n", dev->name);
843 /* Turn off statistics updates while reading. */
844 outw(StatsDisable, ioaddr + EL3_CMD);
845 /* Switch to the stats window, and read everything. */
846 EL3WINDOW(6);
847 lp->stats.tx_carrier_errors += inb(ioaddr + 0);
848 lp->stats.tx_heartbeat_errors += inb(ioaddr + 1);
849 /* Multiple collisions. */ inb(ioaddr + 2);
850 lp->stats.collisions += inb(ioaddr + 3);
851 lp->stats.tx_window_errors += inb(ioaddr + 4);
852 lp->stats.rx_fifo_errors += inb(ioaddr + 5);
853 lp->stats.tx_packets += inb(ioaddr + 6);
854 /* Rx packets */ inb(ioaddr + 7);
855 /* Tx deferrals */ inb(ioaddr + 8);
856 /* Rx octets */ inw(ioaddr + 10);
857 /* Tx octets */ inw(ioaddr + 12);
858
859 /* Back to window 1, and turn statistics back on. */
860 EL3WINDOW(1);
861 outw(StatsEnable, ioaddr + EL3_CMD);
862 }
863
864 static int el3_rx(struct net_device *dev)
865 {
866 struct el3_private *lp = netdev_priv(dev);
867 kio_addr_t ioaddr = dev->base_addr;
868 int worklimit = 32;
869 short rx_status;
870
871 DEBUG(3, "%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n",
872 dev->name, inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
873 while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
874 (--worklimit >= 0)) {
875 if (rx_status & 0x4000) { /* Error, update stats. */
876 short error = rx_status & 0x3800;
877 lp->stats.rx_errors++;
878 switch (error) {
879 case 0x0000: lp->stats.rx_over_errors++; break;
880 case 0x0800: lp->stats.rx_length_errors++; break;
881 case 0x1000: lp->stats.rx_frame_errors++; break;
882 case 0x1800: lp->stats.rx_length_errors++; break;
883 case 0x2000: lp->stats.rx_frame_errors++; break;
884 case 0x2800: lp->stats.rx_crc_errors++; break;
885 }
886 } else {
887 short pkt_len = rx_status & 0x7ff;
888 struct sk_buff *skb;
889
890 skb = dev_alloc_skb(pkt_len+5);
891
892 DEBUG(3, " Receiving packet size %d status %4.4x.\n",
893 pkt_len, rx_status);
894 if (skb != NULL) {
895 skb->dev = dev;
896 skb_reserve(skb, 2);
897 insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
898 (pkt_len+3)>>2);
899 skb->protocol = eth_type_trans(skb, dev);
900 netif_rx(skb);
901 dev->last_rx = jiffies;
902 lp->stats.rx_packets++;
903 lp->stats.rx_bytes += pkt_len;
904 } else {
905 DEBUG(1, "%s: couldn't allocate a sk_buff of"
906 " size %d.\n", dev->name, pkt_len);
907 lp->stats.rx_dropped++;
908 }
909 }
910 /* Pop the top of the Rx FIFO */
911 tc589_wait_for_completion(dev, RxDiscard);
912 }
913 if (worklimit == 0)
914 printk(KERN_WARNING "%s: too much work in el3_rx!\n", dev->name);
915 return 0;
916 }
917
918 static void set_multicast_list(struct net_device *dev)
919 {
920 struct el3_private *lp = netdev_priv(dev);
921 struct pcmcia_device *link = lp->p_dev;
922 kio_addr_t ioaddr = dev->base_addr;
923 u16 opts = SetRxFilter | RxStation | RxBroadcast;
924
925 if (!pcmcia_dev_present(link)) return;
926 if (dev->flags & IFF_PROMISC)
927 opts |= RxMulticast | RxProm;
928 else if (dev->mc_count || (dev->flags & IFF_ALLMULTI))
929 opts |= RxMulticast;
930 outw(opts, ioaddr + EL3_CMD);
931 }
932
933 static int el3_close(struct net_device *dev)
934 {
935 struct el3_private *lp = netdev_priv(dev);
936 struct pcmcia_device *link = lp->p_dev;
937 kio_addr_t ioaddr = dev->base_addr;
938
939 DEBUG(1, "%s: shutting down ethercard.\n", dev->name);
940
941 if (pcmcia_dev_present(link)) {
942 /* Turn off statistics ASAP. We update lp->stats below. */
943 outw(StatsDisable, ioaddr + EL3_CMD);
944
945 /* Disable the receiver and transmitter. */
946 outw(RxDisable, ioaddr + EL3_CMD);
947 outw(TxDisable, ioaddr + EL3_CMD);
948
949 if (dev->if_port == 2)
950 /* Turn off thinnet power. Green! */
951 outw(StopCoax, ioaddr + EL3_CMD);
952 else if (dev->if_port == 1) {
953 /* Disable link beat and jabber */
954 EL3WINDOW(4);
955 outw(0, ioaddr + WN4_MEDIA);
956 }
957
958 /* Switching back to window 0 disables the IRQ. */
959 EL3WINDOW(0);
960 /* But we explicitly zero the IRQ line select anyway. */
961 outw(0x0f00, ioaddr + WN0_IRQ);
962
963 /* Check if the card still exists */
964 if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000)
965 update_stats(dev);
966 }
967
968 link->open--;
969 netif_stop_queue(dev);
970 del_timer_sync(&lp->media);
971
972 return 0;
973 }
974
975 static struct pcmcia_device_id tc589_ids[] = {
976 PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562),
977 PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77),
978 PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589),
979 PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202),
980 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "3CXEM556.cis"),
981 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "3CXEM556.cis"),
982 PCMCIA_DEVICE_NULL,
983 };
984 MODULE_DEVICE_TABLE(pcmcia, tc589_ids);
985
986 static struct pcmcia_driver tc589_driver = {
987 .owner = THIS_MODULE,
988 .drv = {
989 .name = "3c589_cs",
990 },
991 .probe = tc589_probe,
992 .remove = tc589_detach,
993 .id_table = tc589_ids,
994 .suspend = tc589_suspend,
995 .resume = tc589_resume,
996 };
997
998 static int __init init_tc589(void)
999 {
1000 return pcmcia_register_driver(&tc589_driver);
1001 }
1002
1003 static void __exit exit_tc589(void)
1004 {
1005 pcmcia_unregister_driver(&tc589_driver);
1006 }
1007
1008 module_init(init_tc589);
1009 module_exit(exit_tc589);
Linux with added FPC-III support