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x86: fix bootup crash in native_read_tsc()
[wrt350n-kernel.git] / drivers / net / pcmcia / 3c589_cs.c
blobe862d14ece79a6afe1069150a1e65fe3bed6acae
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_DYNAMIC_SHARING|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
199 /* The EL3-specific entries in the device structure. */
200 dev->hard_start_xmit = &el3_start_xmit;
201 dev->set_config = &el3_config;
202 dev->get_stats = &el3_get_stats;
203 dev->set_multicast_list = &set_multicast_list;
204 dev->open = &el3_open;
205 dev->stop = &el3_close;
206 #ifdef HAVE_TX_TIMEOUT
207 dev->tx_timeout = el3_tx_timeout;
208 dev->watchdog_timeo = TX_TIMEOUT;
209 #endif
210 SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
211
212 return tc589_config(link);
213 } /* tc589_attach */
214
215 /*======================================================================
216
217 This deletes a driver "instance". The device is de-registered
218 with Card Services. If it has been released, all local data
219 structures are freed. Otherwise, the structures will be freed
220 when the device is released.
221
222 ======================================================================*/
223
224 static void tc589_detach(struct pcmcia_device *link)
225 {
226 struct net_device *dev = link->priv;
227
228 DEBUG(0, "3c589_detach(0x%p)\n", link);
229
230 if (link->dev_node)
231 unregister_netdev(dev);
232
233 tc589_release(link);
234
235 free_netdev(dev);
236 } /* tc589_detach */
237
238 /*======================================================================
239
240 tc589_config() is scheduled to run after a CARD_INSERTION event
241 is received, to configure the PCMCIA socket, and to make the
242 ethernet device available to the system.
243
244 ======================================================================*/
245
246 #define CS_CHECK(fn, ret) \
247 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
248
249 static int tc589_config(struct pcmcia_device *link)
250 {
251 struct net_device *dev = link->priv;
252 struct el3_private *lp = netdev_priv(dev);
253 tuple_t tuple;
254 __le16 buf[32];
255 __be16 *phys_addr;
256 int last_fn, last_ret, i, j, multi = 0, fifo;
257 kio_addr_t ioaddr;
258 char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
259 DECLARE_MAC_BUF(mac);
260
261 DEBUG(0, "3c589_config(0x%p)\n", link);
262
263 phys_addr = (__be16 *)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(le16_to_cpu(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] == htons(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, "
336 "hw_addr %s\n",
337 dev->name, (multi ? "562" : "589"), dev->base_addr, dev->irq,
338 print_mac(mac, dev->dev_addr));
339 printk(KERN_INFO " %dK FIFO split %s Rx:Tx, %s xcvr\n",
340 (fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3],
341 if_names[dev->if_port]);
342 return 0;
343
344 cs_failed:
345 cs_error(link, last_fn, last_ret);
346 failed:
347 tc589_release(link);
348 return -ENODEV;
349 } /* tc589_config */
350
351 /*======================================================================
352
353 After a card is removed, tc589_release() will unregister the net
354 device, and release the PCMCIA configuration. If the device is
355 still open, this will be postponed until it is closed.
356
357 ======================================================================*/
358
359 static void tc589_release(struct pcmcia_device *link)
360 {
361 pcmcia_disable_device(link);
362 }
363
364 static int tc589_suspend(struct pcmcia_device *link)
365 {
366 struct net_device *dev = link->priv;
367
368 if (link->open)
369 netif_device_detach(dev);
370
371 return 0;
372 }
373
374 static int tc589_resume(struct pcmcia_device *link)
375 {
376 struct net_device *dev = link->priv;
377
378 if (link->open) {
379 tc589_reset(dev);
380 netif_device_attach(dev);
381 }
382
383 return 0;
384 }
385
386 /*====================================================================*/
387
388 /*
389 Use this for commands that may take time to finish
390 */
391 static void tc589_wait_for_completion(struct net_device *dev, int cmd)
392 {
393 int i = 100;
394 outw(cmd, dev->base_addr + EL3_CMD);
395 while (--i > 0)
396 if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break;
397 if (i == 0)
398 printk(KERN_WARNING "%s: command 0x%04x did not complete!\n",
399 dev->name, cmd);
400 }
401
402 /*
403 Read a word from the EEPROM using the regular EEPROM access register.
404 Assume that we are in register window zero.
405 */
406 static u16 read_eeprom(kio_addr_t ioaddr, int index)
407 {
408 int i;
409 outw(EEPROM_READ + index, ioaddr + 10);
410 /* Reading the eeprom takes 162 us */
411 for (i = 1620; i >= 0; i--)
412 if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
413 break;
414 return inw(ioaddr + 12);
415 }
416
417 /*
418 Set transceiver type, perhaps to something other than what the user
419 specified in dev->if_port.
420 */
421 static void tc589_set_xcvr(struct net_device *dev, int if_port)
422 {
423 struct el3_private *lp = netdev_priv(dev);
424 kio_addr_t ioaddr = dev->base_addr;
425
426 EL3WINDOW(0);
427 switch (if_port) {
428 case 0: case 1: outw(0, ioaddr + 6); break;
429 case 2: outw(3<<14, ioaddr + 6); break;
430 case 3: outw(1<<14, ioaddr + 6); break;
431 }
432 /* On PCMCIA, this just turns on the LED */
433 outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD);
434 /* 10baseT interface, enable link beat and jabber check. */
435 EL3WINDOW(4);
436 outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA);
437 EL3WINDOW(1);
438 if (if_port == 2)
439 lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000);
440 else
441 lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800);
442 }
443
444 static void dump_status(struct net_device *dev)
445 {
446 kio_addr_t ioaddr = dev->base_addr;
447 EL3WINDOW(1);
448 printk(KERN_INFO " irq status %04x, rx status %04x, tx status "
449 "%02x tx free %04x\n", inw(ioaddr+EL3_STATUS),
450 inw(ioaddr+RX_STATUS), inb(ioaddr+TX_STATUS),
451 inw(ioaddr+TX_FREE));
452 EL3WINDOW(4);
453 printk(KERN_INFO " diagnostics: fifo %04x net %04x ethernet %04x"
454 " media %04x\n", inw(ioaddr+0x04), inw(ioaddr+0x06),
455 inw(ioaddr+0x08), inw(ioaddr+0x0a));
456 EL3WINDOW(1);
457 }
458
459 /* Reset and restore all of the 3c589 registers. */
460 static void tc589_reset(struct net_device *dev)
461 {
462 kio_addr_t ioaddr = dev->base_addr;
463 int i;
464
465 EL3WINDOW(0);
466 outw(0x0001, ioaddr + 4); /* Activate board. */
467 outw(0x3f00, ioaddr + 8); /* Set the IRQ line. */
468
469 /* Set the station address in window 2. */
470 EL3WINDOW(2);
471 for (i = 0; i < 6; i++)
472 outb(dev->dev_addr[i], ioaddr + i);
473
474 tc589_set_xcvr(dev, dev->if_port);
475
476 /* Switch to the stats window, and clear all stats by reading. */
477 outw(StatsDisable, ioaddr + EL3_CMD);
478 EL3WINDOW(6);
479 for (i = 0; i < 9; i++)
480 inb(ioaddr+i);
481 inw(ioaddr + 10);
482 inw(ioaddr + 12);
483
484 /* Switch to register set 1 for normal use. */
485 EL3WINDOW(1);
486
487 /* Accept b-cast and phys addr only. */
488 outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD);
489 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
490 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
491 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
492 /* Allow status bits to be seen. */
493 outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
494 /* Ack all pending events, and set active indicator mask. */
495 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
496 ioaddr + EL3_CMD);
497 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
498 | AdapterFailure, ioaddr + EL3_CMD);
499 }
500
501 static void netdev_get_drvinfo(struct net_device *dev,
502 struct ethtool_drvinfo *info)
503 {
504 strcpy(info->driver, DRV_NAME);
505 strcpy(info->version, DRV_VERSION);
506 sprintf(info->bus_info, "PCMCIA 0x%lx", dev->base_addr);
507 }
508
509 #ifdef PCMCIA_DEBUG
510 static u32 netdev_get_msglevel(struct net_device *dev)
511 {
512 return pc_debug;
513 }
514
515 static void netdev_set_msglevel(struct net_device *dev, u32 level)
516 {
517 pc_debug = level;
518 }
519 #endif /* PCMCIA_DEBUG */
520
521 static const struct ethtool_ops netdev_ethtool_ops = {
522 .get_drvinfo = netdev_get_drvinfo,
523 #ifdef PCMCIA_DEBUG
524 .get_msglevel = netdev_get_msglevel,
525 .set_msglevel = netdev_set_msglevel,
526 #endif /* PCMCIA_DEBUG */
527 };
528
529 static int el3_config(struct net_device *dev, struct ifmap *map)
530 {
531 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
532 if (map->port <= 3) {
533 dev->if_port = map->port;
534 printk(KERN_INFO "%s: switched to %s port\n",
535 dev->name, if_names[dev->if_port]);
536 tc589_set_xcvr(dev, dev->if_port);
537 } else
538 return -EINVAL;
539 }
540 return 0;
541 }
542
543 static int el3_open(struct net_device *dev)
544 {
545 struct el3_private *lp = netdev_priv(dev);
546 struct pcmcia_device *link = lp->p_dev;
547
548 if (!pcmcia_dev_present(link))
549 return -ENODEV;
550
551 link->open++;
552 netif_start_queue(dev);
553
554 tc589_reset(dev);
555 init_timer(&lp->media);
556 lp->media.function = &media_check;
557 lp->media.data = (unsigned long) dev;
558 lp->media.expires = jiffies + HZ;
559 add_timer(&lp->media);
560
561 DEBUG(1, "%s: opened, status %4.4x.\n",
562 dev->name, inw(dev->base_addr + EL3_STATUS));
563
564 return 0;
565 }
566
567 static void el3_tx_timeout(struct net_device *dev)
568 {
569 struct el3_private *lp = netdev_priv(dev);
570 kio_addr_t ioaddr = dev->base_addr;
571
572 printk(KERN_WARNING "%s: Transmit timed out!\n", dev->name);
573 dump_status(dev);
574 lp->stats.tx_errors++;
575 dev->trans_start = jiffies;
576 /* Issue TX_RESET and TX_START commands. */
577 tc589_wait_for_completion(dev, TxReset);
578 outw(TxEnable, ioaddr + EL3_CMD);
579 netif_wake_queue(dev);
580 }
581
582 static void pop_tx_status(struct net_device *dev)
583 {
584 struct el3_private *lp = netdev_priv(dev);
585 kio_addr_t ioaddr = dev->base_addr;
586 int i;
587
588 /* Clear the Tx status stack. */
589 for (i = 32; i > 0; i--) {
590 u_char tx_status = inb(ioaddr + TX_STATUS);
591 if (!(tx_status & 0x84)) break;
592 /* reset transmitter on jabber error or underrun */
593 if (tx_status & 0x30)
594 tc589_wait_for_completion(dev, TxReset);
595 if (tx_status & 0x38) {
596 DEBUG(1, "%s: transmit error: status 0x%02x\n",
597 dev->name, tx_status);
598 outw(TxEnable, ioaddr + EL3_CMD);
599 lp->stats.tx_aborted_errors++;
600 }
601 outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
602 }
603 }
604
605 static int el3_start_xmit(struct sk_buff *skb, struct net_device *dev)
606 {
607 kio_addr_t ioaddr = dev->base_addr;
608 struct el3_private *priv = netdev_priv(dev);
609 unsigned long flags;
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 spin_lock_irqsave(&priv->lock, flags);
616
617 priv->stats.tx_bytes += skb->len;
618
619 /* Put out the doubleword header... */
620 outw(skb->len, ioaddr + TX_FIFO);
621 outw(0x00, ioaddr + TX_FIFO);
622 /* ... and the packet rounded to a doubleword. */
623 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
624
625 dev->trans_start = jiffies;
626 if (inw(ioaddr + TX_FREE) <= 1536) {
627 netif_stop_queue(dev);
628 /* Interrupt us when the FIFO has room for max-sized packet. */
629 outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
630 }
631
632 pop_tx_status(dev);
633 spin_unlock_irqrestore(&priv->lock, flags);
634 dev_kfree_skb(skb);
635
636 return 0;
637 }
638
639 /* The EL3 interrupt handler. */
640 static irqreturn_t el3_interrupt(int irq, void *dev_id)
641 {
642 struct net_device *dev = (struct net_device *) dev_id;
643 struct el3_private *lp = netdev_priv(dev);
644 kio_addr_t ioaddr;
645 __u16 status;
646 int i = 0, handled = 1;
647
648 if (!netif_device_present(dev))
649 return IRQ_NONE;
650
651 ioaddr = dev->base_addr;
652
653 DEBUG(3, "%s: interrupt, status %4.4x.\n",
654 dev->name, inw(ioaddr + EL3_STATUS));
655
656 spin_lock(&lp->lock);
657 while ((status = inw(ioaddr + EL3_STATUS)) &
658 (IntLatch | RxComplete | StatsFull)) {
659 if ((status & 0xe000) != 0x2000) {
660 DEBUG(1, "%s: interrupt from dead card\n", dev->name);
661 handled = 0;
662 break;
663 }
664
665 if (status & RxComplete)
666 el3_rx(dev);
667
668 if (status & TxAvailable) {
669 DEBUG(3, " TX room bit was handled.\n");
670 /* There's room in the FIFO for a full-sized packet. */
671 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
672 netif_wake_queue(dev);
673 }
674
675 if (status & TxComplete)
676 pop_tx_status(dev);
677
678 if (status & (AdapterFailure | RxEarly | StatsFull)) {
679 /* Handle all uncommon interrupts. */
680 if (status & StatsFull) /* Empty statistics. */
681 update_stats(dev);
682 if (status & RxEarly) { /* Rx early is unused. */
683 el3_rx(dev);
684 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
685 }
686 if (status & AdapterFailure) {
687 u16 fifo_diag;
688 EL3WINDOW(4);
689 fifo_diag = inw(ioaddr + 4);
690 EL3WINDOW(1);
691 printk(KERN_WARNING "%s: adapter failure, FIFO diagnostic"
692 " register %04x.\n", dev->name, fifo_diag);
693 if (fifo_diag & 0x0400) {
694 /* Tx overrun */
695 tc589_wait_for_completion(dev, TxReset);
696 outw(TxEnable, ioaddr + EL3_CMD);
697 }
698 if (fifo_diag & 0x2000) {
699 /* Rx underrun */
700 tc589_wait_for_completion(dev, RxReset);
701 set_multicast_list(dev);
702 outw(RxEnable, ioaddr + EL3_CMD);
703 }
704 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
705 }
706 }
707
708 if (++i > 10) {
709 printk(KERN_ERR "%s: infinite loop in interrupt, "
710 "status %4.4x.\n", dev->name, status);
711 /* Clear all interrupts */
712 outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
713 break;
714 }
715 /* Acknowledge the IRQ. */
716 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
717 }
718
719 lp->last_irq = jiffies;
720 spin_unlock(&lp->lock);
721 DEBUG(3, "%s: exiting interrupt, status %4.4x.\n",
722 dev->name, inw(ioaddr + EL3_STATUS));
723 return IRQ_RETVAL(handled);
724 }
725
726 static void media_check(unsigned long arg)
727 {
728 struct net_device *dev = (struct net_device *)(arg);
729 struct el3_private *lp = netdev_priv(dev);
730 kio_addr_t ioaddr = dev->base_addr;
731 u16 media, errs;
732 unsigned long flags;
733
734 if (!netif_device_present(dev)) goto reschedule;
735
736 /* Check for pending interrupt with expired latency timer: with
737 this, we can limp along even if the interrupt is blocked */
738 if ((inw(ioaddr + EL3_STATUS) & IntLatch) &&
739 (inb(ioaddr + EL3_TIMER) == 0xff)) {
740 if (!lp->fast_poll)
741 printk(KERN_WARNING "%s: interrupt(s) dropped!\n", dev->name);
742 el3_interrupt(dev->irq, dev);
743 lp->fast_poll = HZ;
744 }
745 if (lp->fast_poll) {
746 lp->fast_poll--;
747 lp->media.expires = jiffies + HZ/100;
748 add_timer(&lp->media);
749 return;
750 }
751
752 /* lp->lock guards the EL3 window. Window should always be 1 except
753 when the lock is held */
754 spin_lock_irqsave(&lp->lock, flags);
755 EL3WINDOW(4);
756 media = inw(ioaddr+WN4_MEDIA) & 0xc810;
757
758 /* Ignore collisions unless we've had no irq's recently */
759 if (time_before(jiffies, lp->last_irq + HZ)) {
760 media &= ~0x0010;
761 } else {
762 /* Try harder to detect carrier errors */
763 EL3WINDOW(6);
764 outw(StatsDisable, ioaddr + EL3_CMD);
765 errs = inb(ioaddr + 0);
766 outw(StatsEnable, ioaddr + EL3_CMD);
767 lp->stats.tx_carrier_errors += errs;
768 if (errs || (lp->media_status & 0x0010)) media |= 0x0010;
769 }
770
771 if (media != lp->media_status) {
772 if ((media & lp->media_status & 0x8000) &&
773 ((lp->media_status ^ media) & 0x0800))
774 printk(KERN_INFO "%s: %s link beat\n", dev->name,
775 (lp->media_status & 0x0800 ? "lost" : "found"));
776 else if ((media & lp->media_status & 0x4000) &&
777 ((lp->media_status ^ media) & 0x0010))
778 printk(KERN_INFO "%s: coax cable %s\n", dev->name,
779 (lp->media_status & 0x0010 ? "ok" : "problem"));
780 if (dev->if_port == 0) {
781 if (media & 0x8000) {
782 if (media & 0x0800)
783 printk(KERN_INFO "%s: flipped to 10baseT\n",
784 dev->name);
785 else
786 tc589_set_xcvr(dev, 2);
787 } else if (media & 0x4000) {
788 if (media & 0x0010)
789 tc589_set_xcvr(dev, 1);
790 else
791 printk(KERN_INFO "%s: flipped to 10base2\n",
792 dev->name);
793 }
794 }
795 lp->media_status = media;
796 }
797
798 EL3WINDOW(1);
799 spin_unlock_irqrestore(&lp->lock, flags);
800
801 reschedule:
802 lp->media.expires = jiffies + HZ;
803 add_timer(&lp->media);
804 }
805
806 static struct net_device_stats *el3_get_stats(struct net_device *dev)
807 {
808 struct el3_private *lp = netdev_priv(dev);
809 unsigned long flags;
810 struct pcmcia_device *link = lp->p_dev;
811
812 if (pcmcia_dev_present(link)) {
813 spin_lock_irqsave(&lp->lock, flags);
814 update_stats(dev);
815 spin_unlock_irqrestore(&lp->lock, flags);
816 }
817 return &lp->stats;
818 }
819
820 /*
821 Update statistics. We change to register window 6, so this should be run
822 single-threaded if the device is active. This is expected to be a rare
823 operation, and it's simpler for the rest of the driver to assume that
824 window 1 is always valid rather than use a special window-state variable.
825
826 Caller must hold the lock for this
827 */
828 static void update_stats(struct net_device *dev)
829 {
830 struct el3_private *lp = netdev_priv(dev);
831 kio_addr_t ioaddr = dev->base_addr;
832
833 DEBUG(2, "%s: updating the statistics.\n", dev->name);
834 /* Turn off statistics updates while reading. */
835 outw(StatsDisable, ioaddr + EL3_CMD);
836 /* Switch to the stats window, and read everything. */
837 EL3WINDOW(6);
838 lp->stats.tx_carrier_errors += inb(ioaddr + 0);
839 lp->stats.tx_heartbeat_errors += inb(ioaddr + 1);
840 /* Multiple collisions. */ inb(ioaddr + 2);
841 lp->stats.collisions += inb(ioaddr + 3);
842 lp->stats.tx_window_errors += inb(ioaddr + 4);
843 lp->stats.rx_fifo_errors += inb(ioaddr + 5);
844 lp->stats.tx_packets += inb(ioaddr + 6);
845 /* Rx packets */ inb(ioaddr + 7);
846 /* Tx deferrals */ inb(ioaddr + 8);
847 /* Rx octets */ inw(ioaddr + 10);
848 /* Tx octets */ inw(ioaddr + 12);
849
850 /* Back to window 1, and turn statistics back on. */
851 EL3WINDOW(1);
852 outw(StatsEnable, ioaddr + EL3_CMD);
853 }
854
855 static int el3_rx(struct net_device *dev)
856 {
857 struct el3_private *lp = netdev_priv(dev);
858 kio_addr_t ioaddr = dev->base_addr;
859 int worklimit = 32;
860 short rx_status;
861
862 DEBUG(3, "%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n",
863 dev->name, inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
864 while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
865 (--worklimit >= 0)) {
866 if (rx_status & 0x4000) { /* Error, update stats. */
867 short error = rx_status & 0x3800;
868 lp->stats.rx_errors++;
869 switch (error) {
870 case 0x0000: lp->stats.rx_over_errors++; break;
871 case 0x0800: lp->stats.rx_length_errors++; break;
872 case 0x1000: lp->stats.rx_frame_errors++; break;
873 case 0x1800: lp->stats.rx_length_errors++; break;
874 case 0x2000: lp->stats.rx_frame_errors++; break;
875 case 0x2800: lp->stats.rx_crc_errors++; break;
876 }
877 } else {
878 short pkt_len = rx_status & 0x7ff;
879 struct sk_buff *skb;
880
881 skb = dev_alloc_skb(pkt_len+5);
882
883 DEBUG(3, " Receiving packet size %d status %4.4x.\n",
884 pkt_len, rx_status);
885 if (skb != NULL) {
886 skb_reserve(skb, 2);
887 insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
888 (pkt_len+3)>>2);
889 skb->protocol = eth_type_trans(skb, dev);
890 netif_rx(skb);
891 dev->last_rx = jiffies;
892 lp->stats.rx_packets++;
893 lp->stats.rx_bytes += pkt_len;
894 } else {
895 DEBUG(1, "%s: couldn't allocate a sk_buff of"
896 " size %d.\n", dev->name, pkt_len);
897 lp->stats.rx_dropped++;
898 }
899 }
900 /* Pop the top of the Rx FIFO */
901 tc589_wait_for_completion(dev, RxDiscard);
902 }
903 if (worklimit == 0)
904 printk(KERN_WARNING "%s: too much work in el3_rx!\n", dev->name);
905 return 0;
906 }
907
908 static void set_multicast_list(struct net_device *dev)
909 {
910 struct el3_private *lp = netdev_priv(dev);
911 struct pcmcia_device *link = lp->p_dev;
912 kio_addr_t ioaddr = dev->base_addr;
913 u16 opts = SetRxFilter | RxStation | RxBroadcast;
914
915 if (!pcmcia_dev_present(link)) return;
916 if (dev->flags & IFF_PROMISC)
917 opts |= RxMulticast | RxProm;
918 else if (dev->mc_count || (dev->flags & IFF_ALLMULTI))
919 opts |= RxMulticast;
920 outw(opts, ioaddr + EL3_CMD);
921 }
922
923 static int el3_close(struct net_device *dev)
924 {
925 struct el3_private *lp = netdev_priv(dev);
926 struct pcmcia_device *link = lp->p_dev;
927 kio_addr_t ioaddr = dev->base_addr;
928
929 DEBUG(1, "%s: shutting down ethercard.\n", dev->name);
930
931 if (pcmcia_dev_present(link)) {
932 /* Turn off statistics ASAP. We update lp->stats below. */
933 outw(StatsDisable, ioaddr + EL3_CMD);
934
935 /* Disable the receiver and transmitter. */
936 outw(RxDisable, ioaddr + EL3_CMD);
937 outw(TxDisable, ioaddr + EL3_CMD);
938
939 if (dev->if_port == 2)
940 /* Turn off thinnet power. Green! */
941 outw(StopCoax, ioaddr + EL3_CMD);
942 else if (dev->if_port == 1) {
943 /* Disable link beat and jabber */
944 EL3WINDOW(4);
945 outw(0, ioaddr + WN4_MEDIA);
946 }
947
948 /* Switching back to window 0 disables the IRQ. */
949 EL3WINDOW(0);
950 /* But we explicitly zero the IRQ line select anyway. */
951 outw(0x0f00, ioaddr + WN0_IRQ);
952
953 /* Check if the card still exists */
954 if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000)
955 update_stats(dev);
956 }
957
958 link->open--;
959 netif_stop_queue(dev);
960 del_timer_sync(&lp->media);
961
962 return 0;
963 }
964
965 static struct pcmcia_device_id tc589_ids[] = {
966 PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562),
967 PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77),
968 PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589),
969 PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202),
970 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "3CXEM556.cis"),
971 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "3CXEM556.cis"),
972 PCMCIA_DEVICE_NULL,
973 };
974 MODULE_DEVICE_TABLE(pcmcia, tc589_ids);
975
976 static struct pcmcia_driver tc589_driver = {
977 .owner = THIS_MODULE,
978 .drv = {
979 .name = "3c589_cs",
980 },
981 .probe = tc589_probe,
982 .remove = tc589_detach,
983 .id_table = tc589_ids,
984 .suspend = tc589_suspend,
985 .resume = tc589_resume,
986 };
987
988 static int __init init_tc589(void)
989 {
990 return pcmcia_register_driver(&tc589_driver);
991 }
992
993 static void __exit exit_tc589(void)
994 {
995 pcmcia_unregister_driver(&tc589_driver);
996 }
997
998 module_init(init_tc589);
999 module_exit(exit_tc589);
WRT350N Kernel Patches