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[PATCH] w1: Fix for kconfig entry typo
[linux-2.6/verdex.git] / drivers / net / pcmcia / 3c589_cs.c
blob1e73ff7d5d8e254c327877f140e76f68d1e31ce2
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);
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 const 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 u16 buf[32], *phys_addr;
257 int last_fn, last_ret, i, j, multi = 0, fifo;
258 kio_addr_t ioaddr;
259 char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
260
261 DEBUG(0, "3c589_config(0x%p)\n", link);
262
263 phys_addr = (u16 *)dev->dev_addr;
264 tuple.Attributes = 0;
265 tuple.TupleData = (cisdata_t *)buf;
266 tuple.TupleDataMax = sizeof(buf);
267 tuple.TupleOffset = 0;
268 tuple.Attributes = TUPLE_RETURN_COMMON;
269
270 /* Is this a 3c562? */
271 if (link->manf_id != MANFID_3COM)
272 printk(KERN_INFO "3c589_cs: hmmm, is this really a "
273 "3Com card??\n");
274 multi = (link->card_id == PRODID_3COM_3C562);
275
276 /* For the 3c562, the base address must be xx00-xx7f */
277 link->io.IOAddrLines = 16;
278 for (i = j = 0; j < 0x400; j += 0x10) {
279 if (multi && (j & 0x80)) continue;
280 link->io.BasePort1 = j ^ 0x300;
281 i = pcmcia_request_io(link, &link->io);
282 if (i == CS_SUCCESS) break;
283 }
284 if (i != CS_SUCCESS) {
285 cs_error(link, RequestIO, i);
286 goto failed;
287 }
288 CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
289 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
290
291 dev->irq = link->irq.AssignedIRQ;
292 dev->base_addr = link->io.BasePort1;
293 ioaddr = dev->base_addr;
294 EL3WINDOW(0);
295
296 /* The 3c589 has an extra EEPROM for configuration info, including
297 the hardware address. The 3c562 puts the address in the CIS. */
298 tuple.DesiredTuple = 0x88;
299 if (pcmcia_get_first_tuple(link, &tuple) == CS_SUCCESS) {
300 pcmcia_get_tuple_data(link, &tuple);
301 for (i = 0; i < 3; i++)
302 phys_addr[i] = htons(buf[i]);
303 } else {
304 for (i = 0; i < 3; i++)
305 phys_addr[i] = htons(read_eeprom(ioaddr, i));
306 if (phys_addr[0] == 0x6060) {
307 printk(KERN_ERR "3c589_cs: IO port conflict at 0x%03lx"
308 "-0x%03lx\n", dev->base_addr, dev->base_addr+15);
309 goto failed;
310 }
311 }
312
313 /* The address and resource configuration register aren't loaded from
314 the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version. */
315 outw(0x3f00, ioaddr + 8);
316 fifo = inl(ioaddr);
317
318 /* The if_port symbol can be set when the module is loaded */
319 if ((if_port >= 0) && (if_port <= 3))
320 dev->if_port = if_port;
321 else
322 printk(KERN_ERR "3c589_cs: invalid if_port requested\n");
323
324 link->dev_node = &lp->node;
325 SET_NETDEV_DEV(dev, &handle_to_dev(link));
326
327 if (register_netdev(dev) != 0) {
328 printk(KERN_ERR "3c589_cs: register_netdev() failed\n");
329 link->dev_node = NULL;
330 goto failed;
331 }
332
333 strcpy(lp->node.dev_name, dev->name);
334
335 printk(KERN_INFO "%s: 3Com 3c%s, io %#3lx, irq %d, hw_addr ",
336 dev->name, (multi ? "562" : "589"), dev->base_addr,
337 dev->irq);
338 for (i = 0; i < 6; i++)
339 printk("%02X%s", dev->dev_addr[i], ((i<5) ? ":" : "\n"));
340 printk(KERN_INFO " %dK FIFO split %s Rx:Tx, %s xcvr\n",
341 (fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3],
342 if_names[dev->if_port]);
343 return 0;
344
345 cs_failed:
346 cs_error(link, last_fn, last_ret);
347 failed:
348 tc589_release(link);
349 return -ENODEV;
350 } /* tc589_config */
351
352 /*======================================================================
353
354 After a card is removed, tc589_release() will unregister the net
355 device, and release the PCMCIA configuration. If the device is
356 still open, this will be postponed until it is closed.
357
358 ======================================================================*/
359
360 static void tc589_release(struct pcmcia_device *link)
361 {
362 pcmcia_disable_device(link);
363 }
364
365 static int tc589_suspend(struct pcmcia_device *link)
366 {
367 struct net_device *dev = link->priv;
368
369 if (link->open)
370 netif_device_detach(dev);
371
372 return 0;
373 }
374
375 static int tc589_resume(struct pcmcia_device *link)
376 {
377 struct net_device *dev = link->priv;
378
379 if (link->open) {
380 tc589_reset(dev);
381 netif_device_attach(dev);
382 }
383
384 return 0;
385 }
386
387 /*====================================================================*/
388
389 /*
390 Use this for commands that may take time to finish
391 */
392 static void tc589_wait_for_completion(struct net_device *dev, int cmd)
393 {
394 int i = 100;
395 outw(cmd, dev->base_addr + EL3_CMD);
396 while (--i > 0)
397 if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break;
398 if (i == 0)
399 printk(KERN_WARNING "%s: command 0x%04x did not complete!\n",
400 dev->name, cmd);
401 }
402
403 /*
404 Read a word from the EEPROM using the regular EEPROM access register.
405 Assume that we are in register window zero.
406 */
407 static u16 read_eeprom(kio_addr_t ioaddr, int index)
408 {
409 int i;
410 outw(EEPROM_READ + index, ioaddr + 10);
411 /* Reading the eeprom takes 162 us */
412 for (i = 1620; i >= 0; i--)
413 if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
414 break;
415 return inw(ioaddr + 12);
416 }
417
418 /*
419 Set transceiver type, perhaps to something other than what the user
420 specified in dev->if_port.
421 */
422 static void tc589_set_xcvr(struct net_device *dev, int if_port)
423 {
424 struct el3_private *lp = netdev_priv(dev);
425 kio_addr_t ioaddr = dev->base_addr;
426
427 EL3WINDOW(0);
428 switch (if_port) {
429 case 0: case 1: outw(0, ioaddr + 6); break;
430 case 2: outw(3<<14, ioaddr + 6); break;
431 case 3: outw(1<<14, ioaddr + 6); break;
432 }
433 /* On PCMCIA, this just turns on the LED */
434 outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD);
435 /* 10baseT interface, enable link beat and jabber check. */
436 EL3WINDOW(4);
437 outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA);
438 EL3WINDOW(1);
439 if (if_port == 2)
440 lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000);
441 else
442 lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800);
443 }
444
445 static void dump_status(struct net_device *dev)
446 {
447 kio_addr_t ioaddr = dev->base_addr;
448 EL3WINDOW(1);
449 printk(KERN_INFO " irq status %04x, rx status %04x, tx status "
450 "%02x tx free %04x\n", inw(ioaddr+EL3_STATUS),
451 inw(ioaddr+RX_STATUS), inb(ioaddr+TX_STATUS),
452 inw(ioaddr+TX_FREE));
453 EL3WINDOW(4);
454 printk(KERN_INFO " diagnostics: fifo %04x net %04x ethernet %04x"
455 " media %04x\n", inw(ioaddr+0x04), inw(ioaddr+0x06),
456 inw(ioaddr+0x08), inw(ioaddr+0x0a));
457 EL3WINDOW(1);
458 }
459
460 /* Reset and restore all of the 3c589 registers. */
461 static void tc589_reset(struct net_device *dev)
462 {
463 kio_addr_t ioaddr = dev->base_addr;
464 int i;
465
466 EL3WINDOW(0);
467 outw(0x0001, ioaddr + 4); /* Activate board. */
468 outw(0x3f00, ioaddr + 8); /* Set the IRQ line. */
469
470 /* Set the station address in window 2. */
471 EL3WINDOW(2);
472 for (i = 0; i < 6; i++)
473 outb(dev->dev_addr[i], ioaddr + i);
474
475 tc589_set_xcvr(dev, dev->if_port);
476
477 /* Switch to the stats window, and clear all stats by reading. */
478 outw(StatsDisable, ioaddr + EL3_CMD);
479 EL3WINDOW(6);
480 for (i = 0; i < 9; i++)
481 inb(ioaddr+i);
482 inw(ioaddr + 10);
483 inw(ioaddr + 12);
484
485 /* Switch to register set 1 for normal use. */
486 EL3WINDOW(1);
487
488 /* Accept b-cast and phys addr only. */
489 outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD);
490 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
491 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
492 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
493 /* Allow status bits to be seen. */
494 outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
495 /* Ack all pending events, and set active indicator mask. */
496 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
497 ioaddr + EL3_CMD);
498 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
499 | AdapterFailure, ioaddr + EL3_CMD);
500 }
501
502 static void netdev_get_drvinfo(struct net_device *dev,
503 struct ethtool_drvinfo *info)
504 {
505 strcpy(info->driver, DRV_NAME);
506 strcpy(info->version, DRV_VERSION);
507 sprintf(info->bus_info, "PCMCIA 0x%lx", dev->base_addr);
508 }
509
510 #ifdef PCMCIA_DEBUG
511 static u32 netdev_get_msglevel(struct net_device *dev)
512 {
513 return pc_debug;
514 }
515
516 static void netdev_set_msglevel(struct net_device *dev, u32 level)
517 {
518 pc_debug = level;
519 }
520 #endif /* PCMCIA_DEBUG */
521
522 static const struct ethtool_ops netdev_ethtool_ops = {
523 .get_drvinfo = netdev_get_drvinfo,
524 #ifdef PCMCIA_DEBUG
525 .get_msglevel = netdev_get_msglevel,
526 .set_msglevel = netdev_set_msglevel,
527 #endif /* PCMCIA_DEBUG */
528 };
529
530 static int el3_config(struct net_device *dev, struct ifmap *map)
531 {
532 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
533 if (map->port <= 3) {
534 dev->if_port = map->port;
535 printk(KERN_INFO "%s: switched to %s port\n",
536 dev->name, if_names[dev->if_port]);
537 tc589_set_xcvr(dev, dev->if_port);
538 } else
539 return -EINVAL;
540 }
541 return 0;
542 }
543
544 static int el3_open(struct net_device *dev)
545 {
546 struct el3_private *lp = netdev_priv(dev);
547 struct pcmcia_device *link = lp->p_dev;
548
549 if (!pcmcia_dev_present(link))
550 return -ENODEV;
551
552 link->open++;
553 netif_start_queue(dev);
554
555 tc589_reset(dev);
556 init_timer(&lp->media);
557 lp->media.function = &media_check;
558 lp->media.data = (unsigned long) dev;
559 lp->media.expires = jiffies + HZ;
560 add_timer(&lp->media);
561
562 DEBUG(1, "%s: opened, status %4.4x.\n",
563 dev->name, inw(dev->base_addr + EL3_STATUS));
564
565 return 0;
566 }
567
568 static void el3_tx_timeout(struct net_device *dev)
569 {
570 struct el3_private *lp = netdev_priv(dev);
571 kio_addr_t ioaddr = dev->base_addr;
572
573 printk(KERN_WARNING "%s: Transmit timed out!\n", dev->name);
574 dump_status(dev);
575 lp->stats.tx_errors++;
576 dev->trans_start = jiffies;
577 /* Issue TX_RESET and TX_START commands. */
578 tc589_wait_for_completion(dev, TxReset);
579 outw(TxEnable, ioaddr + EL3_CMD);
580 netif_wake_queue(dev);
581 }
582
583 static void pop_tx_status(struct net_device *dev)
584 {
585 struct el3_private *lp = netdev_priv(dev);
586 kio_addr_t ioaddr = dev->base_addr;
587 int i;
588
589 /* Clear the Tx status stack. */
590 for (i = 32; i > 0; i--) {
591 u_char tx_status = inb(ioaddr + TX_STATUS);
592 if (!(tx_status & 0x84)) break;
593 /* reset transmitter on jabber error or underrun */
594 if (tx_status & 0x30)
595 tc589_wait_for_completion(dev, TxReset);
596 if (tx_status & 0x38) {
597 DEBUG(1, "%s: transmit error: status 0x%02x\n",
598 dev->name, tx_status);
599 outw(TxEnable, ioaddr + EL3_CMD);
600 lp->stats.tx_aborted_errors++;
601 }
602 outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
603 }
604 }
605
606 static int el3_start_xmit(struct sk_buff *skb, struct net_device *dev)
607 {
608 kio_addr_t ioaddr = dev->base_addr;
609 struct el3_private *priv = netdev_priv(dev);
610
611 DEBUG(3, "%s: el3_start_xmit(length = %ld) called, "
612 "status %4.4x.\n", dev->name, (long)skb->len,
613 inw(ioaddr + EL3_STATUS));
614
615 priv->stats.tx_bytes += skb->len;
616
617 /* Put out the doubleword header... */
618 outw(skb->len, ioaddr + TX_FIFO);
619 outw(0x00, ioaddr + TX_FIFO);
620 /* ... and the packet rounded to a doubleword. */
621 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
622
623 dev->trans_start = jiffies;
624 if (inw(ioaddr + TX_FREE) <= 1536) {
625 netif_stop_queue(dev);
626 /* Interrupt us when the FIFO has room for max-sized packet. */
627 outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
628 }
629
630 dev_kfree_skb(skb);
631 pop_tx_status(dev);
632
633 return 0;
634 }
635
636 /* The EL3 interrupt handler. */
637 static irqreturn_t el3_interrupt(int irq, void *dev_id)
638 {
639 struct net_device *dev = (struct net_device *) dev_id;
640 struct el3_private *lp = netdev_priv(dev);
641 kio_addr_t ioaddr;
642 __u16 status;
643 int i = 0, handled = 1;
644
645 if (!netif_device_present(dev))
646 return IRQ_NONE;
647
648 ioaddr = dev->base_addr;
649
650 DEBUG(3, "%s: interrupt, status %4.4x.\n",
651 dev->name, inw(ioaddr + EL3_STATUS));
652
653 spin_lock(&lp->lock);
654 while ((status = inw(ioaddr + EL3_STATUS)) &
655 (IntLatch | RxComplete | StatsFull)) {
656 if ((status & 0xe000) != 0x2000) {
657 DEBUG(1, "%s: interrupt from dead card\n", dev->name);
658 handled = 0;
659 break;
660 }
661
662 if (status & RxComplete)
663 el3_rx(dev);
664
665 if (status & TxAvailable) {
666 DEBUG(3, " TX room bit was handled.\n");
667 /* There's room in the FIFO for a full-sized packet. */
668 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
669 netif_wake_queue(dev);
670 }
671
672 if (status & TxComplete)
673 pop_tx_status(dev);
674
675 if (status & (AdapterFailure | RxEarly | StatsFull)) {
676 /* Handle all uncommon interrupts. */
677 if (status & StatsFull) /* Empty statistics. */
678 update_stats(dev);
679 if (status & RxEarly) { /* Rx early is unused. */
680 el3_rx(dev);
681 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
682 }
683 if (status & AdapterFailure) {
684 u16 fifo_diag;
685 EL3WINDOW(4);
686 fifo_diag = inw(ioaddr + 4);
687 EL3WINDOW(1);
688 printk(KERN_WARNING "%s: adapter failure, FIFO diagnostic"
689 " register %04x.\n", dev->name, fifo_diag);
690 if (fifo_diag & 0x0400) {
691 /* Tx overrun */
692 tc589_wait_for_completion(dev, TxReset);
693 outw(TxEnable, ioaddr + EL3_CMD);
694 }
695 if (fifo_diag & 0x2000) {
696 /* Rx underrun */
697 tc589_wait_for_completion(dev, RxReset);
698 set_multicast_list(dev);
699 outw(RxEnable, ioaddr + EL3_CMD);
700 }
701 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
702 }
703 }
704
705 if (++i > 10) {
706 printk(KERN_ERR "%s: infinite loop in interrupt, "
707 "status %4.4x.\n", dev->name, status);
708 /* Clear all interrupts */
709 outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
710 break;
711 }
712 /* Acknowledge the IRQ. */
713 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
714 }
715
716 lp->last_irq = jiffies;
717 spin_unlock(&lp->lock);
718 DEBUG(3, "%s: exiting interrupt, status %4.4x.\n",
719 dev->name, inw(ioaddr + EL3_STATUS));
720 return IRQ_RETVAL(handled);
721 }
722
723 static void media_check(unsigned long arg)
724 {
725 struct net_device *dev = (struct net_device *)(arg);
726 struct el3_private *lp = netdev_priv(dev);
727 kio_addr_t ioaddr = dev->base_addr;
728 u16 media, errs;
729 unsigned long flags;
730
731 if (!netif_device_present(dev)) goto reschedule;
732
733 EL3WINDOW(1);
734 /* Check for pending interrupt with expired latency timer: with
735 this, we can limp along even if the interrupt is blocked */
736 if ((inw(ioaddr + EL3_STATUS) & IntLatch) &&
737 (inb(ioaddr + EL3_TIMER) == 0xff)) {
738 if (!lp->fast_poll)
739 printk(KERN_WARNING "%s: interrupt(s) dropped!\n", dev->name);
740 el3_interrupt(dev->irq, lp);
741 lp->fast_poll = HZ;
742 }
743 if (lp->fast_poll) {
744 lp->fast_poll--;
745 lp->media.expires = jiffies + HZ/100;
746 add_timer(&lp->media);
747 return;
748 }
749
750 /* lp->lock guards the EL3 window. Window should always be 1 except
751 when the lock is held */
752 spin_lock_irqsave(&lp->lock, flags);
753 EL3WINDOW(4);
754 media = inw(ioaddr+WN4_MEDIA) & 0xc810;
755
756 /* Ignore collisions unless we've had no irq's recently */
757 if (time_before(jiffies, lp->last_irq + HZ)) {
758 media &= ~0x0010;
759 } else {
760 /* Try harder to detect carrier errors */
761 EL3WINDOW(6);
762 outw(StatsDisable, ioaddr + EL3_CMD);
763 errs = inb(ioaddr + 0);
764 outw(StatsEnable, ioaddr + EL3_CMD);
765 lp->stats.tx_carrier_errors += errs;
766 if (errs || (lp->media_status & 0x0010)) media |= 0x0010;
767 }
768
769 if (media != lp->media_status) {
770 if ((media & lp->media_status & 0x8000) &&
771 ((lp->media_status ^ media) & 0x0800))
772 printk(KERN_INFO "%s: %s link beat\n", dev->name,
773 (lp->media_status & 0x0800 ? "lost" : "found"));
774 else if ((media & lp->media_status & 0x4000) &&
775 ((lp->media_status ^ media) & 0x0010))
776 printk(KERN_INFO "%s: coax cable %s\n", dev->name,
777 (lp->media_status & 0x0010 ? "ok" : "problem"));
778 if (dev->if_port == 0) {
779 if (media & 0x8000) {
780 if (media & 0x0800)
781 printk(KERN_INFO "%s: flipped to 10baseT\n",
782 dev->name);
783 else
784 tc589_set_xcvr(dev, 2);
785 } else if (media & 0x4000) {
786 if (media & 0x0010)
787 tc589_set_xcvr(dev, 1);
788 else
789 printk(KERN_INFO "%s: flipped to 10base2\n",
790 dev->name);
791 }
792 }
793 lp->media_status = media;
794 }
795
796 EL3WINDOW(1);
797 spin_unlock_irqrestore(&lp->lock, flags);
798
799 reschedule:
800 lp->media.expires = jiffies + HZ;
801 add_timer(&lp->media);
802 }
803
804 static struct net_device_stats *el3_get_stats(struct net_device *dev)
805 {
806 struct el3_private *lp = netdev_priv(dev);
807 unsigned long flags;
808 struct pcmcia_device *link = lp->p_dev;
809
810 if (pcmcia_dev_present(link)) {
811 spin_lock_irqsave(&lp->lock, flags);
812 update_stats(dev);
813 spin_unlock_irqrestore(&lp->lock, flags);
814 }
815 return &lp->stats;
816 }
817
818 /*
819 Update statistics. We change to register window 6, so this should be run
820 single-threaded if the device is active. This is expected to be a rare
821 operation, and it's simpler for the rest of the driver to assume that
822 window 1 is always valid rather than use a special window-state variable.
823
824 Caller must hold the lock for this
825 */
826 static void update_stats(struct net_device *dev)
827 {
828 struct el3_private *lp = netdev_priv(dev);
829 kio_addr_t ioaddr = dev->base_addr;
830
831 DEBUG(2, "%s: updating the statistics.\n", dev->name);
832 /* Turn off statistics updates while reading. */
833 outw(StatsDisable, ioaddr + EL3_CMD);
834 /* Switch to the stats window, and read everything. */
835 EL3WINDOW(6);
836 lp->stats.tx_carrier_errors += inb(ioaddr + 0);
837 lp->stats.tx_heartbeat_errors += inb(ioaddr + 1);
838 /* Multiple collisions. */ inb(ioaddr + 2);
839 lp->stats.collisions += inb(ioaddr + 3);
840 lp->stats.tx_window_errors += inb(ioaddr + 4);
841 lp->stats.rx_fifo_errors += inb(ioaddr + 5);
842 lp->stats.tx_packets += inb(ioaddr + 6);
843 /* Rx packets */ inb(ioaddr + 7);
844 /* Tx deferrals */ inb(ioaddr + 8);
845 /* Rx octets */ inw(ioaddr + 10);
846 /* Tx octets */ inw(ioaddr + 12);
847
848 /* Back to window 1, and turn statistics back on. */
849 EL3WINDOW(1);
850 outw(StatsEnable, ioaddr + EL3_CMD);
851 }
852
853 static int el3_rx(struct net_device *dev)
854 {
855 struct el3_private *lp = netdev_priv(dev);
856 kio_addr_t ioaddr = dev->base_addr;
857 int worklimit = 32;
858 short rx_status;
859
860 DEBUG(3, "%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n",
861 dev->name, inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
862 while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
863 (--worklimit >= 0)) {
864 if (rx_status & 0x4000) { /* Error, update stats. */
865 short error = rx_status & 0x3800;
866 lp->stats.rx_errors++;
867 switch (error) {
868 case 0x0000: lp->stats.rx_over_errors++; break;
869 case 0x0800: lp->stats.rx_length_errors++; break;
870 case 0x1000: lp->stats.rx_frame_errors++; break;
871 case 0x1800: lp->stats.rx_length_errors++; break;
872 case 0x2000: lp->stats.rx_frame_errors++; break;
873 case 0x2800: lp->stats.rx_crc_errors++; break;
874 }
875 } else {
876 short pkt_len = rx_status & 0x7ff;
877 struct sk_buff *skb;
878
879 skb = dev_alloc_skb(pkt_len+5);
880
881 DEBUG(3, " Receiving packet size %d status %4.4x.\n",
882 pkt_len, rx_status);
883 if (skb != NULL) {
884 skb->dev = dev;
885 skb_reserve(skb, 2);
886 insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
887 (pkt_len+3)>>2);
888 skb->protocol = eth_type_trans(skb, dev);
889 netif_rx(skb);
890 dev->last_rx = jiffies;
891 lp->stats.rx_packets++;
892 lp->stats.rx_bytes += pkt_len;
893 } else {
894 DEBUG(1, "%s: couldn't allocate a sk_buff of"
895 " size %d.\n", dev->name, pkt_len);
896 lp->stats.rx_dropped++;
897 }
898 }
899 /* Pop the top of the Rx FIFO */
900 tc589_wait_for_completion(dev, RxDiscard);
901 }
902 if (worklimit == 0)
903 printk(KERN_WARNING "%s: too much work in el3_rx!\n", dev->name);
904 return 0;
905 }
906
907 static void set_multicast_list(struct net_device *dev)
908 {
909 struct el3_private *lp = netdev_priv(dev);
910 struct pcmcia_device *link = lp->p_dev;
911 kio_addr_t ioaddr = dev->base_addr;
912 u16 opts = SetRxFilter | RxStation | RxBroadcast;
913
914 if (!pcmcia_dev_present(link)) return;
915 if (dev->flags & IFF_PROMISC)
916 opts |= RxMulticast | RxProm;
917 else if (dev->mc_count || (dev->flags & IFF_ALLMULTI))
918 opts |= RxMulticast;
919 outw(opts, ioaddr + EL3_CMD);
920 }
921
922 static int el3_close(struct net_device *dev)
923 {
924 struct el3_private *lp = netdev_priv(dev);
925 struct pcmcia_device *link = lp->p_dev;
926 kio_addr_t ioaddr = dev->base_addr;
927
928 DEBUG(1, "%s: shutting down ethercard.\n", dev->name);
929
930 if (pcmcia_dev_present(link)) {
931 /* Turn off statistics ASAP. We update lp->stats below. */
932 outw(StatsDisable, ioaddr + EL3_CMD);
933
934 /* Disable the receiver and transmitter. */
935 outw(RxDisable, ioaddr + EL3_CMD);
936 outw(TxDisable, ioaddr + EL3_CMD);
937
938 if (dev->if_port == 2)
939 /* Turn off thinnet power. Green! */
940 outw(StopCoax, ioaddr + EL3_CMD);
941 else if (dev->if_port == 1) {
942 /* Disable link beat and jabber */
943 EL3WINDOW(4);
944 outw(0, ioaddr + WN4_MEDIA);
945 }
946
947 /* Switching back to window 0 disables the IRQ. */
948 EL3WINDOW(0);
949 /* But we explicitly zero the IRQ line select anyway. */
950 outw(0x0f00, ioaddr + WN0_IRQ);
951
952 /* Check if the card still exists */
953 if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000)
954 update_stats(dev);
955 }
956
957 link->open--;
958 netif_stop_queue(dev);
959 del_timer_sync(&lp->media);
960
961 return 0;
962 }
963
964 static struct pcmcia_device_id tc589_ids[] = {
965 PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562),
966 PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77),
967 PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589),
968 PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202),
969 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "3CXEM556.cis"),
970 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "3CXEM556.cis"),
971 PCMCIA_DEVICE_NULL,
972 };
973 MODULE_DEVICE_TABLE(pcmcia, tc589_ids);
974
975 static struct pcmcia_driver tc589_driver = {
976 .owner = THIS_MODULE,
977 .drv = {
978 .name = "3c589_cs",
979 },
980 .probe = tc589_probe,
981 .remove = tc589_detach,
982 .id_table = tc589_ids,
983 .suspend = tc589_suspend,
984 .resume = tc589_resume,
985 };
986
987 static int __init init_tc589(void)
988 {
989 return pcmcia_register_driver(&tc589_driver);
990 }
991
992 static void __exit exit_tc589(void)
993 {
994 pcmcia_unregister_driver(&tc589_driver);
995 }
996
997 module_init(init_tc589);
998 module_exit(exit_tc589);
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