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pcmcia: simplify IntType
[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.h>
45 #include <pcmcia/cistpl.h>
46 #include <pcmcia/cisreg.h>
47 #include <pcmcia/ciscode.h>
48 #include <pcmcia/ds.h>
49
50 #include <asm/uaccess.h>
51 #include <asm/io.h>
52 #include <asm/system.h>
53
54 /* To minimize the size of the driver source I only define operating
55 constants if they are used several times. You'll need the manual
56 if you want to understand driver details. */
57 /* Offsets from base I/O address. */
58 #define EL3_DATA 0x00
59 #define EL3_TIMER 0x0a
60 #define EL3_CMD 0x0e
61 #define EL3_STATUS 0x0e
62
63 #define EEPROM_READ 0x0080
64 #define EEPROM_BUSY 0x8000
65
66 #define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
67
68 /* The top five bits written to EL3_CMD are a command, the lower
69 11 bits are the parameter, if applicable. */
70 enum c509cmd {
71 TotalReset = 0<<11,
72 SelectWindow = 1<<11,
73 StartCoax = 2<<11,
74 RxDisable = 3<<11,
75 RxEnable = 4<<11,
76 RxReset = 5<<11,
77 RxDiscard = 8<<11,
78 TxEnable = 9<<11,
79 TxDisable = 10<<11,
80 TxReset = 11<<11,
81 FakeIntr = 12<<11,
82 AckIntr = 13<<11,
83 SetIntrEnb = 14<<11,
84 SetStatusEnb = 15<<11,
85 SetRxFilter = 16<<11,
86 SetRxThreshold = 17<<11,
87 SetTxThreshold = 18<<11,
88 SetTxStart = 19<<11,
89 StatsEnable = 21<<11,
90 StatsDisable = 22<<11,
91 StopCoax = 23<<11
92 };
93
94 enum c509status {
95 IntLatch = 0x0001,
96 AdapterFailure = 0x0002,
97 TxComplete = 0x0004,
98 TxAvailable = 0x0008,
99 RxComplete = 0x0010,
100 RxEarly = 0x0020,
101 IntReq = 0x0040,
102 StatsFull = 0x0080,
103 CmdBusy = 0x1000
104 };
105
106 /* The SetRxFilter command accepts the following classes: */
107 enum RxFilter {
108 RxStation = 1,
109 RxMulticast = 2,
110 RxBroadcast = 4,
111 RxProm = 8
112 };
113
114 /* Register window 1 offsets, the window used in normal operation. */
115 #define TX_FIFO 0x00
116 #define RX_FIFO 0x00
117 #define RX_STATUS 0x08
118 #define TX_STATUS 0x0B
119 #define TX_FREE 0x0C /* Remaining free bytes in Tx buffer. */
120
121 #define WN0_IRQ 0x08 /* Window 0: Set IRQ line in bits 12-15. */
122 #define WN4_MEDIA 0x0A /* Window 4: Various transcvr/media bits. */
123 #define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */
124 #define MEDIA_LED 0x0001 /* Enable link light on 3C589E cards. */
125
126 /* Time in jiffies before concluding Tx hung */
127 #define TX_TIMEOUT ((400*HZ)/1000)
128
129 struct el3_private {
130 struct pcmcia_device *p_dev;
131 /* For transceiver monitoring */
132 struct timer_list media;
133 u16 media_status;
134 u16 fast_poll;
135 unsigned long last_irq;
136 spinlock_t lock;
137 };
138
139 static const char *if_names[] = { "auto", "10baseT", "10base2", "AUI" };
140
141 /*====================================================================*/
142
143 /* Module parameters */
144
145 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
146 MODULE_DESCRIPTION("3Com 3c589 series PCMCIA ethernet driver");
147 MODULE_LICENSE("GPL");
148
149 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
150
151 /* Special hook for setting if_port when module is loaded */
152 INT_MODULE_PARM(if_port, 0);
153
154
155 /*====================================================================*/
156
157 static int tc589_config(struct pcmcia_device *link);
158 static void tc589_release(struct pcmcia_device *link);
159
160 static u16 read_eeprom(unsigned int ioaddr, int index);
161 static void tc589_reset(struct net_device *dev);
162 static void media_check(unsigned long arg);
163 static int el3_config(struct net_device *dev, struct ifmap *map);
164 static int el3_open(struct net_device *dev);
165 static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
166 struct net_device *dev);
167 static irqreturn_t el3_interrupt(int irq, void *dev_id);
168 static void update_stats(struct net_device *dev);
169 static struct net_device_stats *el3_get_stats(struct net_device *dev);
170 static int el3_rx(struct net_device *dev);
171 static int el3_close(struct net_device *dev);
172 static void el3_tx_timeout(struct net_device *dev);
173 static void set_rx_mode(struct net_device *dev);
174 static void set_multicast_list(struct net_device *dev);
175 static const struct ethtool_ops netdev_ethtool_ops;
176
177 static void tc589_detach(struct pcmcia_device *p_dev);
178
179 /*======================================================================
180
181 tc589_attach() creates an "instance" of the driver, allocating
182 local data structures for one device. The device is registered
183 with Card Services.
184
185 ======================================================================*/
186
187 static const struct net_device_ops el3_netdev_ops = {
188 .ndo_open = el3_open,
189 .ndo_stop = el3_close,
190 .ndo_start_xmit = el3_start_xmit,
191 .ndo_tx_timeout = el3_tx_timeout,
192 .ndo_set_config = el3_config,
193 .ndo_get_stats = el3_get_stats,
194 .ndo_set_multicast_list = set_multicast_list,
195 .ndo_change_mtu = eth_change_mtu,
196 .ndo_set_mac_address = eth_mac_addr,
197 .ndo_validate_addr = eth_validate_addr,
198 };
199
200 static int tc589_probe(struct pcmcia_device *link)
201 {
202 struct el3_private *lp;
203 struct net_device *dev;
204
205 dev_dbg(&link->dev, "3c589_attach()\n");
206
207 /* Create new ethernet device */
208 dev = alloc_etherdev(sizeof(struct el3_private));
209 if (!dev)
210 return -ENOMEM;
211 lp = netdev_priv(dev);
212 link->priv = dev;
213 lp->p_dev = link;
214
215 spin_lock_init(&lp->lock);
216 link->resource[0]->end = 16;
217 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_16;
218
219 link->conf.Attributes = CONF_ENABLE_IRQ;
220 link->conf.ConfigIndex = 1;
221
222 dev->netdev_ops = &el3_netdev_ops;
223 dev->watchdog_timeo = TX_TIMEOUT;
224
225 SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
226
227 return tc589_config(link);
228 } /* tc589_attach */
229
230 /*======================================================================
231
232 This deletes a driver "instance". The device is de-registered
233 with Card Services. If it has been released, all local data
234 structures are freed. Otherwise, the structures will be freed
235 when the device is released.
236
237 ======================================================================*/
238
239 static void tc589_detach(struct pcmcia_device *link)
240 {
241 struct net_device *dev = link->priv;
242
243 dev_dbg(&link->dev, "3c589_detach\n");
244
245 unregister_netdev(dev);
246
247 tc589_release(link);
248
249 free_netdev(dev);
250 } /* tc589_detach */
251
252 /*======================================================================
253
254 tc589_config() is scheduled to run after a CARD_INSERTION event
255 is received, to configure the PCMCIA socket, and to make the
256 ethernet device available to the system.
257
258 ======================================================================*/
259
260 static int tc589_config(struct pcmcia_device *link)
261 {
262 struct net_device *dev = link->priv;
263 __be16 *phys_addr;
264 int ret, i, j, multi = 0, fifo;
265 unsigned int ioaddr;
266 char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
267 u8 *buf;
268 size_t len;
269
270 dev_dbg(&link->dev, "3c589_config\n");
271
272 phys_addr = (__be16 *)dev->dev_addr;
273 /* Is this a 3c562? */
274 if (link->manf_id != MANFID_3COM)
275 printk(KERN_INFO "3c589_cs: hmmm, is this really a "
276 "3Com card??\n");
277 multi = (link->card_id == PRODID_3COM_3C562);
278
279 link->io_lines = 16;
280
281 /* For the 3c562, the base address must be xx00-xx7f */
282 for (i = j = 0; j < 0x400; j += 0x10) {
283 if (multi && (j & 0x80)) continue;
284 link->resource[0]->start = j ^ 0x300;
285 i = pcmcia_request_io(link);
286 if (i == 0)
287 break;
288 }
289 if (i != 0)
290 goto failed;
291
292 ret = pcmcia_request_irq(link, el3_interrupt);
293 if (ret)
294 goto failed;
295
296 ret = pcmcia_request_configuration(link, &link->conf);
297 if (ret)
298 goto failed;
299
300 dev->irq = link->irq;
301 dev->base_addr = link->resource[0]->start;
302 ioaddr = dev->base_addr;
303 EL3WINDOW(0);
304
305 /* The 3c589 has an extra EEPROM for configuration info, including
306 the hardware address. The 3c562 puts the address in the CIS. */
307 len = pcmcia_get_tuple(link, 0x88, &buf);
308 if (buf && len >= 6) {
309 for (i = 0; i < 3; i++)
310 phys_addr[i] = htons(le16_to_cpu(buf[i*2]));
311 kfree(buf);
312 } else {
313 kfree(buf); /* 0 < len < 6 */
314 for (i = 0; i < 3; i++)
315 phys_addr[i] = htons(read_eeprom(ioaddr, i));
316 if (phys_addr[0] == htons(0x6060)) {
317 printk(KERN_ERR "3c589_cs: IO port conflict at 0x%03lx"
318 "-0x%03lx\n", dev->base_addr, dev->base_addr+15);
319 goto failed;
320 }
321 }
322
323 /* The address and resource configuration register aren't loaded from
324 the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version. */
325 outw(0x3f00, ioaddr + 8);
326 fifo = inl(ioaddr);
327
328 /* The if_port symbol can be set when the module is loaded */
329 if ((if_port >= 0) && (if_port <= 3))
330 dev->if_port = if_port;
331 else
332 printk(KERN_ERR "3c589_cs: invalid if_port requested\n");
333
334 SET_NETDEV_DEV(dev, &link->dev);
335
336 if (register_netdev(dev) != 0) {
337 printk(KERN_ERR "3c589_cs: register_netdev() failed\n");
338 goto failed;
339 }
340
341 netdev_info(dev, "3Com 3c%s, io %#3lx, irq %d, hw_addr %pM\n",
342 (multi ? "562" : "589"), dev->base_addr, dev->irq,
343 dev->dev_addr);
344 netdev_info(dev, " %dK FIFO split %s Rx:Tx, %s xcvr\n",
345 (fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3],
346 if_names[dev->if_port]);
347 return 0;
348
349 failed:
350 tc589_release(link);
351 return -ENODEV;
352 } /* tc589_config */
353
354 /*======================================================================
355
356 After a card is removed, tc589_release() will unregister the net
357 device, and release the PCMCIA configuration. If the device is
358 still open, this will be postponed until it is closed.
359
360 ======================================================================*/
361
362 static void tc589_release(struct pcmcia_device *link)
363 {
364 pcmcia_disable_device(link);
365 }
366
367 static int tc589_suspend(struct pcmcia_device *link)
368 {
369 struct net_device *dev = link->priv;
370
371 if (link->open)
372 netif_device_detach(dev);
373
374 return 0;
375 }
376
377 static int tc589_resume(struct pcmcia_device *link)
378 {
379 struct net_device *dev = link->priv;
380
381 if (link->open) {
382 tc589_reset(dev);
383 netif_device_attach(dev);
384 }
385
386 return 0;
387 }
388
389 /*====================================================================*/
390
391 /*
392 Use this for commands that may take time to finish
393 */
394 static void tc589_wait_for_completion(struct net_device *dev, int cmd)
395 {
396 int i = 100;
397 outw(cmd, dev->base_addr + EL3_CMD);
398 while (--i > 0)
399 if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break;
400 if (i == 0)
401 netdev_warn(dev, "command 0x%04x did not complete!\n", cmd);
402 }
403
404 /*
405 Read a word from the EEPROM using the regular EEPROM access register.
406 Assume that we are in register window zero.
407 */
408 static u16 read_eeprom(unsigned int ioaddr, int index)
409 {
410 int i;
411 outw(EEPROM_READ + index, ioaddr + 10);
412 /* Reading the eeprom takes 162 us */
413 for (i = 1620; i >= 0; i--)
414 if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
415 break;
416 return inw(ioaddr + 12);
417 }
418
419 /*
420 Set transceiver type, perhaps to something other than what the user
421 specified in dev->if_port.
422 */
423 static void tc589_set_xcvr(struct net_device *dev, int if_port)
424 {
425 struct el3_private *lp = netdev_priv(dev);
426 unsigned int ioaddr = dev->base_addr;
427
428 EL3WINDOW(0);
429 switch (if_port) {
430 case 0: case 1: outw(0, ioaddr + 6); break;
431 case 2: outw(3<<14, ioaddr + 6); break;
432 case 3: outw(1<<14, ioaddr + 6); break;
433 }
434 /* On PCMCIA, this just turns on the LED */
435 outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD);
436 /* 10baseT interface, enable link beat and jabber check. */
437 EL3WINDOW(4);
438 outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA);
439 EL3WINDOW(1);
440 if (if_port == 2)
441 lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000);
442 else
443 lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800);
444 }
445
446 static void dump_status(struct net_device *dev)
447 {
448 unsigned int ioaddr = dev->base_addr;
449 EL3WINDOW(1);
450 netdev_info(dev, " irq status %04x, rx status %04x, tx status %02x tx free %04x\n",
451 inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS),
452 inb(ioaddr+TX_STATUS), inw(ioaddr+TX_FREE));
453 EL3WINDOW(4);
454 netdev_info(dev, " diagnostics: fifo %04x net %04x ethernet %04x media %04x\n",
455 inw(ioaddr+0x04), inw(ioaddr+0x06), inw(ioaddr+0x08),
456 inw(ioaddr+0x0a));
457 EL3WINDOW(1);
458 }
459
460 /* Reset and restore all of the 3c589 registers. */
461 static void tc589_reset(struct net_device *dev)
462 {
463 unsigned int ioaddr = dev->base_addr;
464 int i;
465
466 EL3WINDOW(0);
467 outw(0x0001, ioaddr + 4); /* Activate board. */
468 outw(0x3f00, ioaddr + 8); /* Set the IRQ line. */
469
470 /* Set the station address in window 2. */
471 EL3WINDOW(2);
472 for (i = 0; i < 6; i++)
473 outb(dev->dev_addr[i], ioaddr + i);
474
475 tc589_set_xcvr(dev, dev->if_port);
476
477 /* Switch to the stats window, and clear all stats by reading. */
478 outw(StatsDisable, ioaddr + EL3_CMD);
479 EL3WINDOW(6);
480 for (i = 0; i < 9; i++)
481 inb(ioaddr+i);
482 inw(ioaddr + 10);
483 inw(ioaddr + 12);
484
485 /* Switch to register set 1 for normal use. */
486 EL3WINDOW(1);
487
488 set_rx_mode(dev);
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 static const struct ethtool_ops netdev_ethtool_ops = {
510 .get_drvinfo = netdev_get_drvinfo,
511 };
512
513 static int el3_config(struct net_device *dev, struct ifmap *map)
514 {
515 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
516 if (map->port <= 3) {
517 dev->if_port = map->port;
518 netdev_info(dev, "switched to %s port\n", if_names[dev->if_port]);
519 tc589_set_xcvr(dev, dev->if_port);
520 } else
521 return -EINVAL;
522 }
523 return 0;
524 }
525
526 static int el3_open(struct net_device *dev)
527 {
528 struct el3_private *lp = netdev_priv(dev);
529 struct pcmcia_device *link = lp->p_dev;
530
531 if (!pcmcia_dev_present(link))
532 return -ENODEV;
533
534 link->open++;
535 netif_start_queue(dev);
536
537 tc589_reset(dev);
538 init_timer(&lp->media);
539 lp->media.function = &media_check;
540 lp->media.data = (unsigned long) dev;
541 lp->media.expires = jiffies + HZ;
542 add_timer(&lp->media);
543
544 dev_dbg(&link->dev, "%s: opened, status %4.4x.\n",
545 dev->name, inw(dev->base_addr + EL3_STATUS));
546
547 return 0;
548 }
549
550 static void el3_tx_timeout(struct net_device *dev)
551 {
552 unsigned int ioaddr = dev->base_addr;
553
554 netdev_warn(dev, "Transmit timed out!\n");
555 dump_status(dev);
556 dev->stats.tx_errors++;
557 dev->trans_start = jiffies; /* prevent tx timeout */
558 /* Issue TX_RESET and TX_START commands. */
559 tc589_wait_for_completion(dev, TxReset);
560 outw(TxEnable, ioaddr + EL3_CMD);
561 netif_wake_queue(dev);
562 }
563
564 static void pop_tx_status(struct net_device *dev)
565 {
566 unsigned int ioaddr = dev->base_addr;
567 int i;
568
569 /* Clear the Tx status stack. */
570 for (i = 32; i > 0; i--) {
571 u_char tx_status = inb(ioaddr + TX_STATUS);
572 if (!(tx_status & 0x84)) break;
573 /* reset transmitter on jabber error or underrun */
574 if (tx_status & 0x30)
575 tc589_wait_for_completion(dev, TxReset);
576 if (tx_status & 0x38) {
577 netdev_dbg(dev, "transmit error: status 0x%02x\n", tx_status);
578 outw(TxEnable, ioaddr + EL3_CMD);
579 dev->stats.tx_aborted_errors++;
580 }
581 outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
582 }
583 }
584
585 static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
586 struct net_device *dev)
587 {
588 unsigned int ioaddr = dev->base_addr;
589 struct el3_private *priv = netdev_priv(dev);
590 unsigned long flags;
591
592 netdev_dbg(dev, "el3_start_xmit(length = %ld) called, status %4.4x.\n",
593 (long)skb->len, inw(ioaddr + EL3_STATUS));
594
595 spin_lock_irqsave(&priv->lock, flags);
596
597 dev->stats.tx_bytes += skb->len;
598
599 /* Put out the doubleword header... */
600 outw(skb->len, ioaddr + TX_FIFO);
601 outw(0x00, ioaddr + TX_FIFO);
602 /* ... and the packet rounded to a doubleword. */
603 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
604
605 if (inw(ioaddr + TX_FREE) <= 1536) {
606 netif_stop_queue(dev);
607 /* Interrupt us when the FIFO has room for max-sized packet. */
608 outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
609 }
610
611 pop_tx_status(dev);
612 spin_unlock_irqrestore(&priv->lock, flags);
613 dev_kfree_skb(skb);
614
615 return NETDEV_TX_OK;
616 }
617
618 /* The EL3 interrupt handler. */
619 static irqreturn_t el3_interrupt(int irq, void *dev_id)
620 {
621 struct net_device *dev = (struct net_device *) dev_id;
622 struct el3_private *lp = netdev_priv(dev);
623 unsigned int ioaddr;
624 __u16 status;
625 int i = 0, handled = 1;
626
627 if (!netif_device_present(dev))
628 return IRQ_NONE;
629
630 ioaddr = dev->base_addr;
631
632 netdev_dbg(dev, "interrupt, status %4.4x.\n", inw(ioaddr + EL3_STATUS));
633
634 spin_lock(&lp->lock);
635 while ((status = inw(ioaddr + EL3_STATUS)) &
636 (IntLatch | RxComplete | StatsFull)) {
637 if ((status & 0xe000) != 0x2000) {
638 netdev_dbg(dev, "interrupt from dead card\n");
639 handled = 0;
640 break;
641 }
642 if (status & RxComplete)
643 el3_rx(dev);
644 if (status & TxAvailable) {
645 netdev_dbg(dev, " TX room bit was handled.\n");
646 /* There's room in the FIFO for a full-sized packet. */
647 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
648 netif_wake_queue(dev);
649 }
650 if (status & TxComplete)
651 pop_tx_status(dev);
652 if (status & (AdapterFailure | RxEarly | StatsFull)) {
653 /* Handle all uncommon interrupts. */
654 if (status & StatsFull) /* Empty statistics. */
655 update_stats(dev);
656 if (status & RxEarly) { /* Rx early is unused. */
657 el3_rx(dev);
658 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
659 }
660 if (status & AdapterFailure) {
661 u16 fifo_diag;
662 EL3WINDOW(4);
663 fifo_diag = inw(ioaddr + 4);
664 EL3WINDOW(1);
665 netdev_warn(dev, "adapter failure, FIFO diagnostic register %04x.\n",
666 fifo_diag);
667 if (fifo_diag & 0x0400) {
668 /* Tx overrun */
669 tc589_wait_for_completion(dev, TxReset);
670 outw(TxEnable, ioaddr + EL3_CMD);
671 }
672 if (fifo_diag & 0x2000) {
673 /* Rx underrun */
674 tc589_wait_for_completion(dev, RxReset);
675 set_rx_mode(dev);
676 outw(RxEnable, ioaddr + EL3_CMD);
677 }
678 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
679 }
680 }
681 if (++i > 10) {
682 netdev_err(dev, "infinite loop in interrupt, status %4.4x.\n",
683 status);
684 /* Clear all interrupts */
685 outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
686 break;
687 }
688 /* Acknowledge the IRQ. */
689 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
690 }
691 lp->last_irq = jiffies;
692 spin_unlock(&lp->lock);
693 netdev_dbg(dev, "exiting interrupt, status %4.4x.\n",
694 inw(ioaddr + EL3_STATUS));
695 return IRQ_RETVAL(handled);
696 }
697
698 static void media_check(unsigned long arg)
699 {
700 struct net_device *dev = (struct net_device *)(arg);
701 struct el3_private *lp = netdev_priv(dev);
702 unsigned int ioaddr = dev->base_addr;
703 u16 media, errs;
704 unsigned long flags;
705
706 if (!netif_device_present(dev)) goto reschedule;
707
708 /* Check for pending interrupt with expired latency timer: with
709 this, we can limp along even if the interrupt is blocked */
710 if ((inw(ioaddr + EL3_STATUS) & IntLatch) &&
711 (inb(ioaddr + EL3_TIMER) == 0xff)) {
712 if (!lp->fast_poll)
713 netdev_warn(dev, "interrupt(s) dropped!\n");
714
715 local_irq_save(flags);
716 el3_interrupt(dev->irq, dev);
717 local_irq_restore(flags);
718
719 lp->fast_poll = HZ;
720 }
721 if (lp->fast_poll) {
722 lp->fast_poll--;
723 lp->media.expires = jiffies + HZ/100;
724 add_timer(&lp->media);
725 return;
726 }
727
728 /* lp->lock guards the EL3 window. Window should always be 1 except
729 when the lock is held */
730 spin_lock_irqsave(&lp->lock, flags);
731 EL3WINDOW(4);
732 media = inw(ioaddr+WN4_MEDIA) & 0xc810;
733
734 /* Ignore collisions unless we've had no irq's recently */
735 if (time_before(jiffies, lp->last_irq + HZ)) {
736 media &= ~0x0010;
737 } else {
738 /* Try harder to detect carrier errors */
739 EL3WINDOW(6);
740 outw(StatsDisable, ioaddr + EL3_CMD);
741 errs = inb(ioaddr + 0);
742 outw(StatsEnable, ioaddr + EL3_CMD);
743 dev->stats.tx_carrier_errors += errs;
744 if (errs || (lp->media_status & 0x0010)) media |= 0x0010;
745 }
746
747 if (media != lp->media_status) {
748 if ((media & lp->media_status & 0x8000) &&
749 ((lp->media_status ^ media) & 0x0800))
750 netdev_info(dev, "%s link beat\n",
751 (lp->media_status & 0x0800 ? "lost" : "found"));
752 else if ((media & lp->media_status & 0x4000) &&
753 ((lp->media_status ^ media) & 0x0010))
754 netdev_info(dev, "coax cable %s\n",
755 (lp->media_status & 0x0010 ? "ok" : "problem"));
756 if (dev->if_port == 0) {
757 if (media & 0x8000) {
758 if (media & 0x0800)
759 netdev_info(dev, "flipped to 10baseT\n");
760 else
761 tc589_set_xcvr(dev, 2);
762 } else if (media & 0x4000) {
763 if (media & 0x0010)
764 tc589_set_xcvr(dev, 1);
765 else
766 netdev_info(dev, "flipped to 10base2\n");
767 }
768 }
769 lp->media_status = media;
770 }
771
772 EL3WINDOW(1);
773 spin_unlock_irqrestore(&lp->lock, flags);
774
775 reschedule:
776 lp->media.expires = jiffies + HZ;
777 add_timer(&lp->media);
778 }
779
780 static struct net_device_stats *el3_get_stats(struct net_device *dev)
781 {
782 struct el3_private *lp = netdev_priv(dev);
783 unsigned long flags;
784 struct pcmcia_device *link = lp->p_dev;
785
786 if (pcmcia_dev_present(link)) {
787 spin_lock_irqsave(&lp->lock, flags);
788 update_stats(dev);
789 spin_unlock_irqrestore(&lp->lock, flags);
790 }
791 return &dev->stats;
792 }
793
794 /*
795 Update statistics. We change to register window 6, so this should be run
796 single-threaded if the device is active. This is expected to be a rare
797 operation, and it's simpler for the rest of the driver to assume that
798 window 1 is always valid rather than use a special window-state variable.
799
800 Caller must hold the lock for this
801 */
802 static void update_stats(struct net_device *dev)
803 {
804 unsigned int ioaddr = dev->base_addr;
805
806 netdev_dbg(dev, "updating the statistics.\n");
807 /* Turn off statistics updates while reading. */
808 outw(StatsDisable, ioaddr + EL3_CMD);
809 /* Switch to the stats window, and read everything. */
810 EL3WINDOW(6);
811 dev->stats.tx_carrier_errors += inb(ioaddr + 0);
812 dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
813 /* Multiple collisions. */ inb(ioaddr + 2);
814 dev->stats.collisions += inb(ioaddr + 3);
815 dev->stats.tx_window_errors += inb(ioaddr + 4);
816 dev->stats.rx_fifo_errors += inb(ioaddr + 5);
817 dev->stats.tx_packets += inb(ioaddr + 6);
818 /* Rx packets */ inb(ioaddr + 7);
819 /* Tx deferrals */ inb(ioaddr + 8);
820 /* Rx octets */ inw(ioaddr + 10);
821 /* Tx octets */ inw(ioaddr + 12);
822
823 /* Back to window 1, and turn statistics back on. */
824 EL3WINDOW(1);
825 outw(StatsEnable, ioaddr + EL3_CMD);
826 }
827
828 static int el3_rx(struct net_device *dev)
829 {
830 unsigned int ioaddr = dev->base_addr;
831 int worklimit = 32;
832 short rx_status;
833
834 netdev_dbg(dev, "in rx_packet(), status %4.4x, rx_status %4.4x.\n",
835 inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
836 while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
837 worklimit > 0) {
838 worklimit--;
839 if (rx_status & 0x4000) { /* Error, update stats. */
840 short error = rx_status & 0x3800;
841 dev->stats.rx_errors++;
842 switch (error) {
843 case 0x0000: dev->stats.rx_over_errors++; break;
844 case 0x0800: dev->stats.rx_length_errors++; break;
845 case 0x1000: dev->stats.rx_frame_errors++; break;
846 case 0x1800: dev->stats.rx_length_errors++; break;
847 case 0x2000: dev->stats.rx_frame_errors++; break;
848 case 0x2800: dev->stats.rx_crc_errors++; break;
849 }
850 } else {
851 short pkt_len = rx_status & 0x7ff;
852 struct sk_buff *skb;
853
854 skb = dev_alloc_skb(pkt_len+5);
855
856 netdev_dbg(dev, " Receiving packet size %d status %4.4x.\n",
857 pkt_len, rx_status);
858 if (skb != NULL) {
859 skb_reserve(skb, 2);
860 insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
861 (pkt_len+3)>>2);
862 skb->protocol = eth_type_trans(skb, dev);
863 netif_rx(skb);
864 dev->stats.rx_packets++;
865 dev->stats.rx_bytes += pkt_len;
866 } else {
867 netdev_dbg(dev, "couldn't allocate a sk_buff of size %d.\n",
868 pkt_len);
869 dev->stats.rx_dropped++;
870 }
871 }
872 /* Pop the top of the Rx FIFO */
873 tc589_wait_for_completion(dev, RxDiscard);
874 }
875 if (worklimit == 0)
876 netdev_warn(dev, "too much work in el3_rx!\n");
877 return 0;
878 }
879
880 static void set_rx_mode(struct net_device *dev)
881 {
882 unsigned int ioaddr = dev->base_addr;
883 u16 opts = SetRxFilter | RxStation | RxBroadcast;
884
885 if (dev->flags & IFF_PROMISC)
886 opts |= RxMulticast | RxProm;
887 else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI))
888 opts |= RxMulticast;
889 outw(opts, ioaddr + EL3_CMD);
890 }
891
892 static void set_multicast_list(struct net_device *dev)
893 {
894 struct el3_private *priv = netdev_priv(dev);
895 unsigned long flags;
896
897 spin_lock_irqsave(&priv->lock, flags);
898 set_rx_mode(dev);
899 spin_unlock_irqrestore(&priv->lock, flags);
900 }
901
902 static int el3_close(struct net_device *dev)
903 {
904 struct el3_private *lp = netdev_priv(dev);
905 struct pcmcia_device *link = lp->p_dev;
906 unsigned int ioaddr = dev->base_addr;
907
908 dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name);
909
910 if (pcmcia_dev_present(link)) {
911 /* Turn off statistics ASAP. We update dev->stats below. */
912 outw(StatsDisable, ioaddr + EL3_CMD);
913
914 /* Disable the receiver and transmitter. */
915 outw(RxDisable, ioaddr + EL3_CMD);
916 outw(TxDisable, ioaddr + EL3_CMD);
917
918 if (dev->if_port == 2)
919 /* Turn off thinnet power. Green! */
920 outw(StopCoax, ioaddr + EL3_CMD);
921 else if (dev->if_port == 1) {
922 /* Disable link beat and jabber */
923 EL3WINDOW(4);
924 outw(0, ioaddr + WN4_MEDIA);
925 }
926
927 /* Switching back to window 0 disables the IRQ. */
928 EL3WINDOW(0);
929 /* But we explicitly zero the IRQ line select anyway. */
930 outw(0x0f00, ioaddr + WN0_IRQ);
931
932 /* Check if the card still exists */
933 if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000)
934 update_stats(dev);
935 }
936
937 link->open--;
938 netif_stop_queue(dev);
939 del_timer_sync(&lp->media);
940
941 return 0;
942 }
943
944 static struct pcmcia_device_id tc589_ids[] = {
945 PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562),
946 PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77),
947 PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589),
948 PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202),
949 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "cis/3CXEM556.cis"),
950 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "cis/3CXEM556.cis"),
951 PCMCIA_DEVICE_NULL,
952 };
953 MODULE_DEVICE_TABLE(pcmcia, tc589_ids);
954
955 static struct pcmcia_driver tc589_driver = {
956 .owner = THIS_MODULE,
957 .drv = {
958 .name = "3c589_cs",
959 },
960 .probe = tc589_probe,
961 .remove = tc589_detach,
962 .id_table = tc589_ids,
963 .suspend = tc589_suspend,
964 .resume = tc589_resume,
965 };
966
967 static int __init init_tc589(void)
968 {
969 return pcmcia_register_driver(&tc589_driver);
970 }
971
972 static void __exit exit_tc589(void)
973 {
974 pcmcia_unregister_driver(&tc589_driver);
975 }
976
977 module_init(init_tc589);
978 module_exit(exit_tc589);
Linux kernel - Deliverables
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