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Merge branch 'for_rmk' of git://git.mnementh.co.uk/linux-2.6-im into devel
[deliverable/linux.git] / drivers / net / pcmcia / 3c589_cs.c
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@lxorguk.ukuu.org.uk>
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 /* For transceiver monitoring */
111 struct timer_list media;
112 u16 media_status;
113 u16 fast_poll;
114 unsigned long last_irq;
115 spinlock_t lock;
116 };
117
118 static const char *if_names[] = { "auto", "10baseT", "10base2", "AUI" };
119
120 /*====================================================================*/
121
122 /* Module parameters */
123
124 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
125 MODULE_DESCRIPTION("3Com 3c589 series PCMCIA ethernet driver");
126 MODULE_LICENSE("GPL");
127
128 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
129
130 /* Special hook for setting if_port when module is loaded */
131 INT_MODULE_PARM(if_port, 0);
132
133 #ifdef PCMCIA_DEBUG
134 INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG);
135 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
136 static char *version =
137 DRV_NAME ".c " DRV_VERSION " 2001/10/13 00:08:50 (David Hinds)";
138 #else
139 #define DEBUG(n, args...)
140 #endif
141
142 /*====================================================================*/
143
144 static int tc589_config(struct pcmcia_device *link);
145 static void tc589_release(struct pcmcia_device *link);
146
147 static u16 read_eeprom(unsigned int ioaddr, int index);
148 static void tc589_reset(struct net_device *dev);
149 static void media_check(unsigned long arg);
150 static int el3_config(struct net_device *dev, struct ifmap *map);
151 static int el3_open(struct net_device *dev);
152 static int el3_start_xmit(struct sk_buff *skb, struct net_device *dev);
153 static irqreturn_t el3_interrupt(int irq, void *dev_id);
154 static void update_stats(struct net_device *dev);
155 static struct net_device_stats *el3_get_stats(struct net_device *dev);
156 static int el3_rx(struct net_device *dev);
157 static int el3_close(struct net_device *dev);
158 static void el3_tx_timeout(struct net_device *dev);
159 static void set_multicast_list(struct net_device *dev);
160 static const struct ethtool_ops netdev_ethtool_ops;
161
162 static void tc589_detach(struct pcmcia_device *p_dev);
163
164 /*======================================================================
165
166 tc589_attach() creates an "instance" of the driver, allocating
167 local data structures for one device. The device is registered
168 with Card Services.
169
170 ======================================================================*/
171
172 static int tc589_probe(struct pcmcia_device *link)
173 {
174 struct el3_private *lp;
175 struct net_device *dev;
176
177 DEBUG(0, "3c589_attach()\n");
178
179 /* Create new ethernet device */
180 dev = alloc_etherdev(sizeof(struct el3_private));
181 if (!dev)
182 return -ENOMEM;
183 lp = netdev_priv(dev);
184 link->priv = dev;
185 lp->p_dev = link;
186
187 spin_lock_init(&lp->lock);
188 link->io.NumPorts1 = 16;
189 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
190 link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_HANDLE_PRESENT;
191 link->irq.IRQInfo1 = IRQ_LEVEL_ID;
192 link->irq.Handler = &el3_interrupt;
193 link->irq.Instance = dev;
194 link->conf.Attributes = CONF_ENABLE_IRQ;
195 link->conf.IntType = INT_MEMORY_AND_IO;
196 link->conf.ConfigIndex = 1;
197
198 /* The EL3-specific entries in the device structure. */
199 dev->hard_start_xmit = &el3_start_xmit;
200 dev->set_config = &el3_config;
201 dev->get_stats = &el3_get_stats;
202 dev->set_multicast_list = &set_multicast_list;
203 dev->open = &el3_open;
204 dev->stop = &el3_close;
205 #ifdef HAVE_TX_TIMEOUT
206 dev->tx_timeout = el3_tx_timeout;
207 dev->watchdog_timeo = TX_TIMEOUT;
208 #endif
209 SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
210
211 return tc589_config(link);
212 } /* tc589_attach */
213
214 /*======================================================================
215
216 This deletes a driver "instance". The device is de-registered
217 with Card Services. If it has been released, all local data
218 structures are freed. Otherwise, the structures will be freed
219 when the device is released.
220
221 ======================================================================*/
222
223 static void tc589_detach(struct pcmcia_device *link)
224 {
225 struct net_device *dev = link->priv;
226
227 DEBUG(0, "3c589_detach(0x%p)\n", link);
228
229 if (link->dev_node)
230 unregister_netdev(dev);
231
232 tc589_release(link);
233
234 free_netdev(dev);
235 } /* tc589_detach */
236
237 /*======================================================================
238
239 tc589_config() is scheduled to run after a CARD_INSERTION event
240 is received, to configure the PCMCIA socket, and to make the
241 ethernet device available to the system.
242
243 ======================================================================*/
244
245 #define CS_CHECK(fn, ret) \
246 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
247
248 static int tc589_config(struct pcmcia_device *link)
249 {
250 struct net_device *dev = link->priv;
251 struct el3_private *lp = netdev_priv(dev);
252 tuple_t tuple;
253 __le16 buf[32];
254 __be16 *phys_addr;
255 int last_fn, last_ret, i, j, multi = 0, fifo;
256 unsigned int 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 = (__be16 *)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 == 0)
282 break;
283 }
284 if (i != 0) {
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) == 0) {
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(unsigned int 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 unsigned int 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 unsigned int 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 unsigned int 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 unsigned int ioaddr = dev->base_addr;
570
571 printk(KERN_WARNING "%s: Transmit timed out!\n", dev->name);
572 dump_status(dev);
573 dev->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 unsigned int ioaddr = dev->base_addr;
584 int i;
585
586 /* Clear the Tx status stack. */
587 for (i = 32; i > 0; i--) {
588 u_char tx_status = inb(ioaddr + TX_STATUS);
589 if (!(tx_status & 0x84)) break;
590 /* reset transmitter on jabber error or underrun */
591 if (tx_status & 0x30)
592 tc589_wait_for_completion(dev, TxReset);
593 if (tx_status & 0x38) {
594 DEBUG(1, "%s: transmit error: status 0x%02x\n",
595 dev->name, tx_status);
596 outw(TxEnable, ioaddr + EL3_CMD);
597 dev->stats.tx_aborted_errors++;
598 }
599 outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
600 }
601 }
602
603 static int el3_start_xmit(struct sk_buff *skb, struct net_device *dev)
604 {
605 unsigned int ioaddr = dev->base_addr;
606 struct el3_private *priv = netdev_priv(dev);
607 unsigned long flags;
608
609 DEBUG(3, "%s: el3_start_xmit(length = %ld) called, "
610 "status %4.4x.\n", dev->name, (long)skb->len,
611 inw(ioaddr + EL3_STATUS));
612
613 spin_lock_irqsave(&priv->lock, flags);
614
615 dev->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 pop_tx_status(dev);
631 spin_unlock_irqrestore(&priv->lock, flags);
632 dev_kfree_skb(skb);
633
634 return 0;
635 }
636
637 /* The EL3 interrupt handler. */
638 static irqreturn_t el3_interrupt(int irq, void *dev_id)
639 {
640 struct net_device *dev = (struct net_device *) dev_id;
641 struct el3_private *lp = netdev_priv(dev);
642 unsigned int ioaddr;
643 __u16 status;
644 int i = 0, handled = 1;
645
646 if (!netif_device_present(dev))
647 return IRQ_NONE;
648
649 ioaddr = dev->base_addr;
650
651 DEBUG(3, "%s: interrupt, status %4.4x.\n",
652 dev->name, inw(ioaddr + EL3_STATUS));
653
654 spin_lock(&lp->lock);
655 while ((status = inw(ioaddr + EL3_STATUS)) &
656 (IntLatch | RxComplete | StatsFull)) {
657 if ((status & 0xe000) != 0x2000) {
658 DEBUG(1, "%s: interrupt from dead card\n", dev->name);
659 handled = 0;
660 break;
661 }
662
663 if (status & RxComplete)
664 el3_rx(dev);
665
666 if (status & TxAvailable) {
667 DEBUG(3, " TX room bit was handled.\n");
668 /* There's room in the FIFO for a full-sized packet. */
669 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
670 netif_wake_queue(dev);
671 }
672
673 if (status & TxComplete)
674 pop_tx_status(dev);
675
676 if (status & (AdapterFailure | RxEarly | StatsFull)) {
677 /* Handle all uncommon interrupts. */
678 if (status & StatsFull) /* Empty statistics. */
679 update_stats(dev);
680 if (status & RxEarly) { /* Rx early is unused. */
681 el3_rx(dev);
682 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
683 }
684 if (status & AdapterFailure) {
685 u16 fifo_diag;
686 EL3WINDOW(4);
687 fifo_diag = inw(ioaddr + 4);
688 EL3WINDOW(1);
689 printk(KERN_WARNING "%s: adapter failure, FIFO diagnostic"
690 " register %04x.\n", dev->name, fifo_diag);
691 if (fifo_diag & 0x0400) {
692 /* Tx overrun */
693 tc589_wait_for_completion(dev, TxReset);
694 outw(TxEnable, ioaddr + EL3_CMD);
695 }
696 if (fifo_diag & 0x2000) {
697 /* Rx underrun */
698 tc589_wait_for_completion(dev, RxReset);
699 set_multicast_list(dev);
700 outw(RxEnable, ioaddr + EL3_CMD);
701 }
702 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
703 }
704 }
705
706 if (++i > 10) {
707 printk(KERN_ERR "%s: infinite loop in interrupt, "
708 "status %4.4x.\n", dev->name, status);
709 /* Clear all interrupts */
710 outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
711 break;
712 }
713 /* Acknowledge the IRQ. */
714 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
715 }
716
717 lp->last_irq = jiffies;
718 spin_unlock(&lp->lock);
719 DEBUG(3, "%s: exiting interrupt, status %4.4x.\n",
720 dev->name, inw(ioaddr + EL3_STATUS));
721 return IRQ_RETVAL(handled);
722 }
723
724 static void media_check(unsigned long arg)
725 {
726 struct net_device *dev = (struct net_device *)(arg);
727 struct el3_private *lp = netdev_priv(dev);
728 unsigned int ioaddr = dev->base_addr;
729 u16 media, errs;
730 unsigned long flags;
731
732 if (!netif_device_present(dev)) goto reschedule;
733
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, dev);
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 dev->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 &dev->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 unsigned int ioaddr = dev->base_addr;
829
830 DEBUG(2, "%s: updating the statistics.\n", dev->name);
831 /* Turn off statistics updates while reading. */
832 outw(StatsDisable, ioaddr + EL3_CMD);
833 /* Switch to the stats window, and read everything. */
834 EL3WINDOW(6);
835 dev->stats.tx_carrier_errors += inb(ioaddr + 0);
836 dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
837 /* Multiple collisions. */ inb(ioaddr + 2);
838 dev->stats.collisions += inb(ioaddr + 3);
839 dev->stats.tx_window_errors += inb(ioaddr + 4);
840 dev->stats.rx_fifo_errors += inb(ioaddr + 5);
841 dev->stats.tx_packets += inb(ioaddr + 6);
842 /* Rx packets */ inb(ioaddr + 7);
843 /* Tx deferrals */ inb(ioaddr + 8);
844 /* Rx octets */ inw(ioaddr + 10);
845 /* Tx octets */ inw(ioaddr + 12);
846
847 /* Back to window 1, and turn statistics back on. */
848 EL3WINDOW(1);
849 outw(StatsEnable, ioaddr + EL3_CMD);
850 }
851
852 static int el3_rx(struct net_device *dev)
853 {
854 unsigned int ioaddr = dev->base_addr;
855 int worklimit = 32;
856 short rx_status;
857
858 DEBUG(3, "%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n",
859 dev->name, inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
860 while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
861 (--worklimit >= 0)) {
862 if (rx_status & 0x4000) { /* Error, update stats. */
863 short error = rx_status & 0x3800;
864 dev->stats.rx_errors++;
865 switch (error) {
866 case 0x0000: dev->stats.rx_over_errors++; break;
867 case 0x0800: dev->stats.rx_length_errors++; break;
868 case 0x1000: dev->stats.rx_frame_errors++; break;
869 case 0x1800: dev->stats.rx_length_errors++; break;
870 case 0x2000: dev->stats.rx_frame_errors++; break;
871 case 0x2800: dev->stats.rx_crc_errors++; break;
872 }
873 } else {
874 short pkt_len = rx_status & 0x7ff;
875 struct sk_buff *skb;
876
877 skb = dev_alloc_skb(pkt_len+5);
878
879 DEBUG(3, " Receiving packet size %d status %4.4x.\n",
880 pkt_len, rx_status);
881 if (skb != NULL) {
882 skb_reserve(skb, 2);
883 insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
884 (pkt_len+3)>>2);
885 skb->protocol = eth_type_trans(skb, dev);
886 netif_rx(skb);
887 dev->last_rx = jiffies;
888 dev->stats.rx_packets++;
889 dev->stats.rx_bytes += pkt_len;
890 } else {
891 DEBUG(1, "%s: couldn't allocate a sk_buff of"
892 " size %d.\n", dev->name, pkt_len);
893 dev->stats.rx_dropped++;
894 }
895 }
896 /* Pop the top of the Rx FIFO */
897 tc589_wait_for_completion(dev, RxDiscard);
898 }
899 if (worklimit == 0)
900 printk(KERN_WARNING "%s: too much work in el3_rx!\n", dev->name);
901 return 0;
902 }
903
904 static void set_multicast_list(struct net_device *dev)
905 {
906 struct el3_private *lp = netdev_priv(dev);
907 struct pcmcia_device *link = lp->p_dev;
908 unsigned int ioaddr = dev->base_addr;
909 u16 opts = SetRxFilter | RxStation | RxBroadcast;
910
911 if (!pcmcia_dev_present(link)) return;
912 if (dev->flags & IFF_PROMISC)
913 opts |= RxMulticast | RxProm;
914 else if (dev->mc_count || (dev->flags & IFF_ALLMULTI))
915 opts |= RxMulticast;
916 outw(opts, ioaddr + EL3_CMD);
917 }
918
919 static int el3_close(struct net_device *dev)
920 {
921 struct el3_private *lp = netdev_priv(dev);
922 struct pcmcia_device *link = lp->p_dev;
923 unsigned int ioaddr = dev->base_addr;
924
925 DEBUG(1, "%s: shutting down ethercard.\n", dev->name);
926
927 if (pcmcia_dev_present(link)) {
928 /* Turn off statistics ASAP. We update dev->stats below. */
929 outw(StatsDisable, ioaddr + EL3_CMD);
930
931 /* Disable the receiver and transmitter. */
932 outw(RxDisable, ioaddr + EL3_CMD);
933 outw(TxDisable, ioaddr + EL3_CMD);
934
935 if (dev->if_port == 2)
936 /* Turn off thinnet power. Green! */
937 outw(StopCoax, ioaddr + EL3_CMD);
938 else if (dev->if_port == 1) {
939 /* Disable link beat and jabber */
940 EL3WINDOW(4);
941 outw(0, ioaddr + WN4_MEDIA);
942 }
943
944 /* Switching back to window 0 disables the IRQ. */
945 EL3WINDOW(0);
946 /* But we explicitly zero the IRQ line select anyway. */
947 outw(0x0f00, ioaddr + WN0_IRQ);
948
949 /* Check if the card still exists */
950 if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000)
951 update_stats(dev);
952 }
953
954 link->open--;
955 netif_stop_queue(dev);
956 del_timer_sync(&lp->media);
957
958 return 0;
959 }
960
961 static struct pcmcia_device_id tc589_ids[] = {
962 PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562),
963 PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77),
964 PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589),
965 PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202),
966 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "3CXEM556.cis"),
967 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "3CXEM556.cis"),
968 PCMCIA_DEVICE_NULL,
969 };
970 MODULE_DEVICE_TABLE(pcmcia, tc589_ids);
971
972 static struct pcmcia_driver tc589_driver = {
973 .owner = THIS_MODULE,
974 .drv = {
975 .name = "3c589_cs",
976 },
977 .probe = tc589_probe,
978 .remove = tc589_detach,
979 .id_table = tc589_ids,
980 .suspend = tc589_suspend,
981 .resume = tc589_resume,
982 };
983
984 static int __init init_tc589(void)
985 {
986 return pcmcia_register_driver(&tc589_driver);
987 }
988
989 static void __exit exit_tc589(void)
990 {
991 pcmcia_unregister_driver(&tc589_driver);
992 }
993
994 module_init(init_tc589);
995 module_exit(exit_tc589);
Linux kernel - Deliverables
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