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cmd64x: don't clear the other channel's interrupt
[linux-2.6/linux-mips/linux-dm7025.git] / drivers / net / pcmcia / 3c589_cs.c
bloba98fe07cce70e0f6b591334dfa3ecfd038a3feff
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 u16 buf[32], *phys_addr;
255 int last_fn, last_ret, i, j, multi = 0, fifo;
256 kio_addr_t ioaddr;
257 char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
258 DECLARE_MAC_BUF(mac);
259
260 DEBUG(0, "3c589_config(0x%p)\n", link);
261
262 phys_addr = (u16 *)dev->dev_addr;
263 tuple.Attributes = 0;
264 tuple.TupleData = (cisdata_t *)buf;
265 tuple.TupleDataMax = sizeof(buf);
266 tuple.TupleOffset = 0;
267 tuple.Attributes = TUPLE_RETURN_COMMON;
268
269 /* Is this a 3c562? */
270 if (link->manf_id != MANFID_3COM)
271 printk(KERN_INFO "3c589_cs: hmmm, is this really a "
272 "3Com card??\n");
273 multi = (link->card_id == PRODID_3COM_3C562);
274
275 /* For the 3c562, the base address must be xx00-xx7f */
276 link->io.IOAddrLines = 16;
277 for (i = j = 0; j < 0x400; j += 0x10) {
278 if (multi && (j & 0x80)) continue;
279 link->io.BasePort1 = j ^ 0x300;
280 i = pcmcia_request_io(link, &link->io);
281 if (i == CS_SUCCESS) break;
282 }
283 if (i != CS_SUCCESS) {
284 cs_error(link, RequestIO, i);
285 goto failed;
286 }
287 CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
288 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
289
290 dev->irq = link->irq.AssignedIRQ;
291 dev->base_addr = link->io.BasePort1;
292 ioaddr = dev->base_addr;
293 EL3WINDOW(0);
294
295 /* The 3c589 has an extra EEPROM for configuration info, including
296 the hardware address. The 3c562 puts the address in the CIS. */
297 tuple.DesiredTuple = 0x88;
298 if (pcmcia_get_first_tuple(link, &tuple) == CS_SUCCESS) {
299 pcmcia_get_tuple_data(link, &tuple);
300 for (i = 0; i < 3; i++)
301 phys_addr[i] = htons(buf[i]);
302 } else {
303 for (i = 0; i < 3; i++)
304 phys_addr[i] = htons(read_eeprom(ioaddr, i));
305 if (phys_addr[0] == 0x6060) {
306 printk(KERN_ERR "3c589_cs: IO port conflict at 0x%03lx"
307 "-0x%03lx\n", dev->base_addr, dev->base_addr+15);
308 goto failed;
309 }
310 }
311
312 /* The address and resource configuration register aren't loaded from
313 the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version. */
314 outw(0x3f00, ioaddr + 8);
315 fifo = inl(ioaddr);
316
317 /* The if_port symbol can be set when the module is loaded */
318 if ((if_port >= 0) && (if_port <= 3))
319 dev->if_port = if_port;
320 else
321 printk(KERN_ERR "3c589_cs: invalid if_port requested\n");
322
323 link->dev_node = &lp->node;
324 SET_NETDEV_DEV(dev, &handle_to_dev(link));
325
326 if (register_netdev(dev) != 0) {
327 printk(KERN_ERR "3c589_cs: register_netdev() failed\n");
328 link->dev_node = NULL;
329 goto failed;
330 }
331
332 strcpy(lp->node.dev_name, dev->name);
333
334 printk(KERN_INFO "%s: 3Com 3c%s, io %#3lx, irq %d, "
335 "hw_addr %s\n",
336 dev->name, (multi ? "562" : "589"), dev->base_addr, dev->irq,
337 print_mac(mac, dev->dev_addr));
338 printk(KERN_INFO " %dK FIFO split %s Rx:Tx, %s xcvr\n",
339 (fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3],
340 if_names[dev->if_port]);
341 return 0;
342
343 cs_failed:
344 cs_error(link, last_fn, last_ret);
345 failed:
346 tc589_release(link);
347 return -ENODEV;
348 } /* tc589_config */
349
350 /*======================================================================
351
352 After a card is removed, tc589_release() will unregister the net
353 device, and release the PCMCIA configuration. If the device is
354 still open, this will be postponed until it is closed.
355
356 ======================================================================*/
357
358 static void tc589_release(struct pcmcia_device *link)
359 {
360 pcmcia_disable_device(link);
361 }
362
363 static int tc589_suspend(struct pcmcia_device *link)
364 {
365 struct net_device *dev = link->priv;
366
367 if (link->open)
368 netif_device_detach(dev);
369
370 return 0;
371 }
372
373 static int tc589_resume(struct pcmcia_device *link)
374 {
375 struct net_device *dev = link->priv;
376
377 if (link->open) {
378 tc589_reset(dev);
379 netif_device_attach(dev);
380 }
381
382 return 0;
383 }
384
385 /*====================================================================*/
386
387 /*
388 Use this for commands that may take time to finish
389 */
390 static void tc589_wait_for_completion(struct net_device *dev, int cmd)
391 {
392 int i = 100;
393 outw(cmd, dev->base_addr + EL3_CMD);
394 while (--i > 0)
395 if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break;
396 if (i == 0)
397 printk(KERN_WARNING "%s: command 0x%04x did not complete!\n",
398 dev->name, cmd);
399 }
400
401 /*
402 Read a word from the EEPROM using the regular EEPROM access register.
403 Assume that we are in register window zero.
404 */
405 static u16 read_eeprom(kio_addr_t ioaddr, int index)
406 {
407 int i;
408 outw(EEPROM_READ + index, ioaddr + 10);
409 /* Reading the eeprom takes 162 us */
410 for (i = 1620; i >= 0; i--)
411 if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
412 break;
413 return inw(ioaddr + 12);
414 }
415
416 /*
417 Set transceiver type, perhaps to something other than what the user
418 specified in dev->if_port.
419 */
420 static void tc589_set_xcvr(struct net_device *dev, int if_port)
421 {
422 struct el3_private *lp = netdev_priv(dev);
423 kio_addr_t ioaddr = dev->base_addr;
424
425 EL3WINDOW(0);
426 switch (if_port) {
427 case 0: case 1: outw(0, ioaddr + 6); break;
428 case 2: outw(3<<14, ioaddr + 6); break;
429 case 3: outw(1<<14, ioaddr + 6); break;
430 }
431 /* On PCMCIA, this just turns on the LED */
432 outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD);
433 /* 10baseT interface, enable link beat and jabber check. */
434 EL3WINDOW(4);
435 outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA);
436 EL3WINDOW(1);
437 if (if_port == 2)
438 lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000);
439 else
440 lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800);
441 }
442
443 static void dump_status(struct net_device *dev)
444 {
445 kio_addr_t ioaddr = dev->base_addr;
446 EL3WINDOW(1);
447 printk(KERN_INFO " irq status %04x, rx status %04x, tx status "
448 "%02x tx free %04x\n", inw(ioaddr+EL3_STATUS),
449 inw(ioaddr+RX_STATUS), inb(ioaddr+TX_STATUS),
450 inw(ioaddr+TX_FREE));
451 EL3WINDOW(4);
452 printk(KERN_INFO " diagnostics: fifo %04x net %04x ethernet %04x"
453 " media %04x\n", inw(ioaddr+0x04), inw(ioaddr+0x06),
454 inw(ioaddr+0x08), inw(ioaddr+0x0a));
455 EL3WINDOW(1);
456 }
457
458 /* Reset and restore all of the 3c589 registers. */
459 static void tc589_reset(struct net_device *dev)
460 {
461 kio_addr_t ioaddr = dev->base_addr;
462 int i;
463
464 EL3WINDOW(0);
465 outw(0x0001, ioaddr + 4); /* Activate board. */
466 outw(0x3f00, ioaddr + 8); /* Set the IRQ line. */
467
468 /* Set the station address in window 2. */
469 EL3WINDOW(2);
470 for (i = 0; i < 6; i++)
471 outb(dev->dev_addr[i], ioaddr + i);
472
473 tc589_set_xcvr(dev, dev->if_port);
474
475 /* Switch to the stats window, and clear all stats by reading. */
476 outw(StatsDisable, ioaddr + EL3_CMD);
477 EL3WINDOW(6);
478 for (i = 0; i < 9; i++)
479 inb(ioaddr+i);
480 inw(ioaddr + 10);
481 inw(ioaddr + 12);
482
483 /* Switch to register set 1 for normal use. */
484 EL3WINDOW(1);
485
486 /* Accept b-cast and phys addr only. */
487 outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD);
488 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
489 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
490 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
491 /* Allow status bits to be seen. */
492 outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
493 /* Ack all pending events, and set active indicator mask. */
494 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
495 ioaddr + EL3_CMD);
496 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
497 | AdapterFailure, ioaddr + EL3_CMD);
498 }
499
500 static void netdev_get_drvinfo(struct net_device *dev,
501 struct ethtool_drvinfo *info)
502 {
503 strcpy(info->driver, DRV_NAME);
504 strcpy(info->version, DRV_VERSION);
505 sprintf(info->bus_info, "PCMCIA 0x%lx", dev->base_addr);
506 }
507
508 #ifdef PCMCIA_DEBUG
509 static u32 netdev_get_msglevel(struct net_device *dev)
510 {
511 return pc_debug;
512 }
513
514 static void netdev_set_msglevel(struct net_device *dev, u32 level)
515 {
516 pc_debug = level;
517 }
518 #endif /* PCMCIA_DEBUG */
519
520 static const struct ethtool_ops netdev_ethtool_ops = {
521 .get_drvinfo = netdev_get_drvinfo,
522 #ifdef PCMCIA_DEBUG
523 .get_msglevel = netdev_get_msglevel,
524 .set_msglevel = netdev_set_msglevel,
525 #endif /* PCMCIA_DEBUG */
526 };
527
528 static int el3_config(struct net_device *dev, struct ifmap *map)
529 {
530 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
531 if (map->port <= 3) {
532 dev->if_port = map->port;
533 printk(KERN_INFO "%s: switched to %s port\n",
534 dev->name, if_names[dev->if_port]);
535 tc589_set_xcvr(dev, dev->if_port);
536 } else
537 return -EINVAL;
538 }
539 return 0;
540 }
541
542 static int el3_open(struct net_device *dev)
543 {
544 struct el3_private *lp = netdev_priv(dev);
545 struct pcmcia_device *link = lp->p_dev;
546
547 if (!pcmcia_dev_present(link))
548 return -ENODEV;
549
550 link->open++;
551 netif_start_queue(dev);
552
553 tc589_reset(dev);
554 init_timer(&lp->media);
555 lp->media.function = &media_check;
556 lp->media.data = (unsigned long) dev;
557 lp->media.expires = jiffies + HZ;
558 add_timer(&lp->media);
559
560 DEBUG(1, "%s: opened, status %4.4x.\n",
561 dev->name, inw(dev->base_addr + EL3_STATUS));
562
563 return 0;
564 }
565
566 static void el3_tx_timeout(struct net_device *dev)
567 {
568 struct el3_private *lp = netdev_priv(dev);
569 kio_addr_t ioaddr = dev->base_addr;
570
571 printk(KERN_WARNING "%s: Transmit timed out!\n", dev->name);
572 dump_status(dev);
573 lp->stats.tx_errors++;
574 dev->trans_start = jiffies;
575 /* Issue TX_RESET and TX_START commands. */
576 tc589_wait_for_completion(dev, TxReset);
577 outw(TxEnable, ioaddr + EL3_CMD);
578 netif_wake_queue(dev);
579 }
580
581 static void pop_tx_status(struct net_device *dev)
582 {
583 struct el3_private *lp = netdev_priv(dev);
584 kio_addr_t ioaddr = dev->base_addr;
585 int i;
586
587 /* Clear the Tx status stack. */
588 for (i = 32; i > 0; i--) {
589 u_char tx_status = inb(ioaddr + TX_STATUS);
590 if (!(tx_status & 0x84)) break;
591 /* reset transmitter on jabber error or underrun */
592 if (tx_status & 0x30)
593 tc589_wait_for_completion(dev, TxReset);
594 if (tx_status & 0x38) {
595 DEBUG(1, "%s: transmit error: status 0x%02x\n",
596 dev->name, tx_status);
597 outw(TxEnable, ioaddr + EL3_CMD);
598 lp->stats.tx_aborted_errors++;
599 }
600 outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
601 }
602 }
603
604 static int el3_start_xmit(struct sk_buff *skb, struct net_device *dev)
605 {
606 kio_addr_t ioaddr = dev->base_addr;
607 struct el3_private *priv = netdev_priv(dev);
608 unsigned long flags;
609
610 DEBUG(3, "%s: el3_start_xmit(length = %ld) called, "
611 "status %4.4x.\n", dev->name, (long)skb->len,
612 inw(ioaddr + EL3_STATUS));
613
614 spin_lock_irqsave(&priv->lock, flags);
615
616 priv->stats.tx_bytes += skb->len;
617
618 /* Put out the doubleword header... */
619 outw(skb->len, ioaddr + TX_FIFO);
620 outw(0x00, ioaddr + TX_FIFO);
621 /* ... and the packet rounded to a doubleword. */
622 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
623
624 dev->trans_start = jiffies;
625 if (inw(ioaddr + TX_FREE) <= 1536) {
626 netif_stop_queue(dev);
627 /* Interrupt us when the FIFO has room for max-sized packet. */
628 outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
629 }
630
631 pop_tx_status(dev);
632 spin_unlock_irqrestore(&priv->lock, flags);
633 dev_kfree_skb(skb);
634
635 return 0;
636 }
637
638 /* The EL3 interrupt handler. */
639 static irqreturn_t el3_interrupt(int irq, void *dev_id)
640 {
641 struct net_device *dev = (struct net_device *) dev_id;
642 struct el3_private *lp = netdev_priv(dev);
643 kio_addr_t ioaddr;
644 __u16 status;
645 int i = 0, handled = 1;
646
647 if (!netif_device_present(dev))
648 return IRQ_NONE;
649
650 ioaddr = dev->base_addr;
651
652 DEBUG(3, "%s: interrupt, status %4.4x.\n",
653 dev->name, inw(ioaddr + EL3_STATUS));
654
655 spin_lock(&lp->lock);
656 while ((status = inw(ioaddr + EL3_STATUS)) &
657 (IntLatch | RxComplete | StatsFull)) {
658 if ((status & 0xe000) != 0x2000) {
659 DEBUG(1, "%s: interrupt from dead card\n", dev->name);
660 handled = 0;
661 break;
662 }
663
664 if (status & RxComplete)
665 el3_rx(dev);
666
667 if (status & TxAvailable) {
668 DEBUG(3, " TX room bit was handled.\n");
669 /* There's room in the FIFO for a full-sized packet. */
670 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
671 netif_wake_queue(dev);
672 }
673
674 if (status & TxComplete)
675 pop_tx_status(dev);
676
677 if (status & (AdapterFailure | RxEarly | StatsFull)) {
678 /* Handle all uncommon interrupts. */
679 if (status & StatsFull) /* Empty statistics. */
680 update_stats(dev);
681 if (status & RxEarly) { /* Rx early is unused. */
682 el3_rx(dev);
683 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
684 }
685 if (status & AdapterFailure) {
686 u16 fifo_diag;
687 EL3WINDOW(4);
688 fifo_diag = inw(ioaddr + 4);
689 EL3WINDOW(1);
690 printk(KERN_WARNING "%s: adapter failure, FIFO diagnostic"
691 " register %04x.\n", dev->name, fifo_diag);
692 if (fifo_diag & 0x0400) {
693 /* Tx overrun */
694 tc589_wait_for_completion(dev, TxReset);
695 outw(TxEnable, ioaddr + EL3_CMD);
696 }
697 if (fifo_diag & 0x2000) {
698 /* Rx underrun */
699 tc589_wait_for_completion(dev, RxReset);
700 set_multicast_list(dev);
701 outw(RxEnable, ioaddr + EL3_CMD);
702 }
703 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
704 }
705 }
706
707 if (++i > 10) {
708 printk(KERN_ERR "%s: infinite loop in interrupt, "
709 "status %4.4x.\n", dev->name, status);
710 /* Clear all interrupts */
711 outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
712 break;
713 }
714 /* Acknowledge the IRQ. */
715 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
716 }
717
718 lp->last_irq = jiffies;
719 spin_unlock(&lp->lock);
720 DEBUG(3, "%s: exiting interrupt, status %4.4x.\n",
721 dev->name, inw(ioaddr + EL3_STATUS));
722 return IRQ_RETVAL(handled);
723 }
724
725 static void media_check(unsigned long arg)
726 {
727 struct net_device *dev = (struct net_device *)(arg);
728 struct el3_private *lp = netdev_priv(dev);
729 kio_addr_t ioaddr = dev->base_addr;
730 u16 media, errs;
731 unsigned long flags;
732
733 if (!netif_device_present(dev)) goto reschedule;
734
735 /* Check for pending interrupt with expired latency timer: with
736 this, we can limp along even if the interrupt is blocked */
737 if ((inw(ioaddr + EL3_STATUS) & IntLatch) &&
738 (inb(ioaddr + EL3_TIMER) == 0xff)) {
739 if (!lp->fast_poll)
740 printk(KERN_WARNING "%s: interrupt(s) dropped!\n", dev->name);
741 el3_interrupt(dev->irq, dev);
742 lp->fast_poll = HZ;
743 }
744 if (lp->fast_poll) {
745 lp->fast_poll--;
746 lp->media.expires = jiffies + HZ/100;
747 add_timer(&lp->media);
748 return;
749 }
750
751 /* lp->lock guards the EL3 window. Window should always be 1 except
752 when the lock is held */
753 spin_lock_irqsave(&lp->lock, flags);
754 EL3WINDOW(4);
755 media = inw(ioaddr+WN4_MEDIA) & 0xc810;
756
757 /* Ignore collisions unless we've had no irq's recently */
758 if (time_before(jiffies, lp->last_irq + HZ)) {
759 media &= ~0x0010;
760 } else {
761 /* Try harder to detect carrier errors */
762 EL3WINDOW(6);
763 outw(StatsDisable, ioaddr + EL3_CMD);
764 errs = inb(ioaddr + 0);
765 outw(StatsEnable, ioaddr + EL3_CMD);
766 lp->stats.tx_carrier_errors += errs;
767 if (errs || (lp->media_status & 0x0010)) media |= 0x0010;
768 }
769
770 if (media != lp->media_status) {
771 if ((media & lp->media_status & 0x8000) &&
772 ((lp->media_status ^ media) & 0x0800))
773 printk(KERN_INFO "%s: %s link beat\n", dev->name,
774 (lp->media_status & 0x0800 ? "lost" : "found"));
775 else if ((media & lp->media_status & 0x4000) &&
776 ((lp->media_status ^ media) & 0x0010))
777 printk(KERN_INFO "%s: coax cable %s\n", dev->name,
778 (lp->media_status & 0x0010 ? "ok" : "problem"));
779 if (dev->if_port == 0) {
780 if (media & 0x8000) {
781 if (media & 0x0800)
782 printk(KERN_INFO "%s: flipped to 10baseT\n",
783 dev->name);
784 else
785 tc589_set_xcvr(dev, 2);
786 } else if (media & 0x4000) {
787 if (media & 0x0010)
788 tc589_set_xcvr(dev, 1);
789 else
790 printk(KERN_INFO "%s: flipped to 10base2\n",
791 dev->name);
792 }
793 }
794 lp->media_status = media;
795 }
796
797 EL3WINDOW(1);
798 spin_unlock_irqrestore(&lp->lock, flags);
799
800 reschedule:
801 lp->media.expires = jiffies + HZ;
802 add_timer(&lp->media);
803 }
804
805 static struct net_device_stats *el3_get_stats(struct net_device *dev)
806 {
807 struct el3_private *lp = netdev_priv(dev);
808 unsigned long flags;
809 struct pcmcia_device *link = lp->p_dev;
810
811 if (pcmcia_dev_present(link)) {
812 spin_lock_irqsave(&lp->lock, flags);
813 update_stats(dev);
814 spin_unlock_irqrestore(&lp->lock, flags);
815 }
816 return &lp->stats;
817 }
818
819 /*
820 Update statistics. We change to register window 6, so this should be run
821 single-threaded if the device is active. This is expected to be a rare
822 operation, and it's simpler for the rest of the driver to assume that
823 window 1 is always valid rather than use a special window-state variable.
824
825 Caller must hold the lock for this
826 */
827 static void update_stats(struct net_device *dev)
828 {
829 struct el3_private *lp = netdev_priv(dev);
830 kio_addr_t ioaddr = dev->base_addr;
831
832 DEBUG(2, "%s: updating the statistics.\n", dev->name);
833 /* Turn off statistics updates while reading. */
834 outw(StatsDisable, ioaddr + EL3_CMD);
835 /* Switch to the stats window, and read everything. */
836 EL3WINDOW(6);
837 lp->stats.tx_carrier_errors += inb(ioaddr + 0);
838 lp->stats.tx_heartbeat_errors += inb(ioaddr + 1);
839 /* Multiple collisions. */ inb(ioaddr + 2);
840 lp->stats.collisions += inb(ioaddr + 3);
841 lp->stats.tx_window_errors += inb(ioaddr + 4);
842 lp->stats.rx_fifo_errors += inb(ioaddr + 5);
843 lp->stats.tx_packets += inb(ioaddr + 6);
844 /* Rx packets */ inb(ioaddr + 7);
845 /* Tx deferrals */ inb(ioaddr + 8);
846 /* Rx octets */ inw(ioaddr + 10);
847 /* Tx octets */ inw(ioaddr + 12);
848
849 /* Back to window 1, and turn statistics back on. */
850 EL3WINDOW(1);
851 outw(StatsEnable, ioaddr + EL3_CMD);
852 }
853
854 static int el3_rx(struct net_device *dev)
855 {
856 struct el3_private *lp = netdev_priv(dev);
857 kio_addr_t ioaddr = dev->base_addr;
858 int worklimit = 32;
859 short rx_status;
860
861 DEBUG(3, "%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n",
862 dev->name, inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
863 while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
864 (--worklimit >= 0)) {
865 if (rx_status & 0x4000) { /* Error, update stats. */
866 short error = rx_status & 0x3800;
867 lp->stats.rx_errors++;
868 switch (error) {
869 case 0x0000: lp->stats.rx_over_errors++; break;
870 case 0x0800: lp->stats.rx_length_errors++; break;
871 case 0x1000: lp->stats.rx_frame_errors++; break;
872 case 0x1800: lp->stats.rx_length_errors++; break;
873 case 0x2000: lp->stats.rx_frame_errors++; break;
874 case 0x2800: lp->stats.rx_crc_errors++; break;
875 }
876 } else {
877 short pkt_len = rx_status & 0x7ff;
878 struct sk_buff *skb;
879
880 skb = dev_alloc_skb(pkt_len+5);
881
882 DEBUG(3, " Receiving packet size %d status %4.4x.\n",
883 pkt_len, rx_status);
884 if (skb != NULL) {
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);
A Kernel for the Dreambox dm7025.