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pcmcia: dev_node removal (drivers with unregister_netdev check)
[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 /* For transceiver monitoring */
110 struct timer_list media;
111 u16 media_status;
112 u16 fast_poll;
113 unsigned long last_irq;
114 spinlock_t lock;
115 };
116
117 static const char *if_names[] = { "auto", "10baseT", "10base2", "AUI" };
118
119 /*====================================================================*/
120
121 /* Module parameters */
122
123 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
124 MODULE_DESCRIPTION("3Com 3c589 series PCMCIA ethernet driver");
125 MODULE_LICENSE("GPL");
126
127 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
128
129 /* Special hook for setting if_port when module is loaded */
130 INT_MODULE_PARM(if_port, 0);
131
132
133 /*====================================================================*/
134
135 static int tc589_config(struct pcmcia_device *link);
136 static void tc589_release(struct pcmcia_device *link);
137
138 static u16 read_eeprom(unsigned int ioaddr, int index);
139 static void tc589_reset(struct net_device *dev);
140 static void media_check(unsigned long arg);
141 static int el3_config(struct net_device *dev, struct ifmap *map);
142 static int el3_open(struct net_device *dev);
143 static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
144 struct net_device *dev);
145 static irqreturn_t el3_interrupt(int irq, void *dev_id);
146 static void update_stats(struct net_device *dev);
147 static struct net_device_stats *el3_get_stats(struct net_device *dev);
148 static int el3_rx(struct net_device *dev);
149 static int el3_close(struct net_device *dev);
150 static void el3_tx_timeout(struct net_device *dev);
151 static void set_rx_mode(struct net_device *dev);
152 static void set_multicast_list(struct net_device *dev);
153 static const struct ethtool_ops netdev_ethtool_ops;
154
155 static void tc589_detach(struct pcmcia_device *p_dev);
156
157 /*======================================================================
158
159 tc589_attach() creates an "instance" of the driver, allocating
160 local data structures for one device. The device is registered
161 with Card Services.
162
163 ======================================================================*/
164
165 static const struct net_device_ops el3_netdev_ops = {
166 .ndo_open = el3_open,
167 .ndo_stop = el3_close,
168 .ndo_start_xmit = el3_start_xmit,
169 .ndo_tx_timeout = el3_tx_timeout,
170 .ndo_set_config = el3_config,
171 .ndo_get_stats = el3_get_stats,
172 .ndo_set_multicast_list = set_multicast_list,
173 .ndo_change_mtu = eth_change_mtu,
174 .ndo_set_mac_address = eth_mac_addr,
175 .ndo_validate_addr = eth_validate_addr,
176 };
177
178 static int tc589_probe(struct pcmcia_device *link)
179 {
180 struct el3_private *lp;
181 struct net_device *dev;
182
183 dev_dbg(&link->dev, "3c589_attach()\n");
184
185 /* Create new ethernet device */
186 dev = alloc_etherdev(sizeof(struct el3_private));
187 if (!dev)
188 return -ENOMEM;
189 lp = netdev_priv(dev);
190 link->priv = dev;
191 lp->p_dev = link;
192
193 spin_lock_init(&lp->lock);
194 link->io.NumPorts1 = 16;
195 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
196
197 link->conf.Attributes = CONF_ENABLE_IRQ;
198 link->conf.IntType = INT_MEMORY_AND_IO;
199 link->conf.ConfigIndex = 1;
200
201 dev->netdev_ops = &el3_netdev_ops;
202 dev->watchdog_timeo = TX_TIMEOUT;
203
204 SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
205
206 return tc589_config(link);
207 } /* tc589_attach */
208
209 /*======================================================================
210
211 This deletes a driver "instance". The device is de-registered
212 with Card Services. If it has been released, all local data
213 structures are freed. Otherwise, the structures will be freed
214 when the device is released.
215
216 ======================================================================*/
217
218 static void tc589_detach(struct pcmcia_device *link)
219 {
220 struct net_device *dev = link->priv;
221
222 dev_dbg(&link->dev, "3c589_detach\n");
223
224 unregister_netdev(dev);
225
226 tc589_release(link);
227
228 free_netdev(dev);
229 } /* tc589_detach */
230
231 /*======================================================================
232
233 tc589_config() is scheduled to run after a CARD_INSERTION event
234 is received, to configure the PCMCIA socket, and to make the
235 ethernet device available to the system.
236
237 ======================================================================*/
238
239 static int tc589_config(struct pcmcia_device *link)
240 {
241 struct net_device *dev = link->priv;
242 __be16 *phys_addr;
243 int ret, i, j, multi = 0, fifo;
244 unsigned int ioaddr;
245 char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
246 u8 *buf;
247 size_t len;
248
249 dev_dbg(&link->dev, "3c589_config\n");
250
251 phys_addr = (__be16 *)dev->dev_addr;
252 /* Is this a 3c562? */
253 if (link->manf_id != MANFID_3COM)
254 printk(KERN_INFO "3c589_cs: hmmm, is this really a "
255 "3Com card??\n");
256 multi = (link->card_id == PRODID_3COM_3C562);
257
258 /* For the 3c562, the base address must be xx00-xx7f */
259 link->io.IOAddrLines = 16;
260 for (i = j = 0; j < 0x400; j += 0x10) {
261 if (multi && (j & 0x80)) continue;
262 link->io.BasePort1 = j ^ 0x300;
263 i = pcmcia_request_io(link, &link->io);
264 if (i == 0)
265 break;
266 }
267 if (i != 0)
268 goto failed;
269
270 ret = pcmcia_request_irq(link, el3_interrupt);
271 if (ret)
272 goto failed;
273
274 ret = pcmcia_request_configuration(link, &link->conf);
275 if (ret)
276 goto failed;
277
278 dev->irq = link->irq;
279 dev->base_addr = link->io.BasePort1;
280 ioaddr = dev->base_addr;
281 EL3WINDOW(0);
282
283 /* The 3c589 has an extra EEPROM for configuration info, including
284 the hardware address. The 3c562 puts the address in the CIS. */
285 len = pcmcia_get_tuple(link, 0x88, &buf);
286 if (buf && len >= 6) {
287 for (i = 0; i < 3; i++)
288 phys_addr[i] = htons(le16_to_cpu(buf[i*2]));
289 kfree(buf);
290 } else {
291 kfree(buf); /* 0 < len < 6 */
292 for (i = 0; i < 3; i++)
293 phys_addr[i] = htons(read_eeprom(ioaddr, i));
294 if (phys_addr[0] == htons(0x6060)) {
295 printk(KERN_ERR "3c589_cs: IO port conflict at 0x%03lx"
296 "-0x%03lx\n", dev->base_addr, dev->base_addr+15);
297 goto failed;
298 }
299 }
300
301 /* The address and resource configuration register aren't loaded from
302 the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version. */
303 outw(0x3f00, ioaddr + 8);
304 fifo = inl(ioaddr);
305
306 /* The if_port symbol can be set when the module is loaded */
307 if ((if_port >= 0) && (if_port <= 3))
308 dev->if_port = if_port;
309 else
310 printk(KERN_ERR "3c589_cs: invalid if_port requested\n");
311
312 SET_NETDEV_DEV(dev, &link->dev);
313
314 if (register_netdev(dev) != 0) {
315 printk(KERN_ERR "3c589_cs: register_netdev() failed\n");
316 goto failed;
317 }
318
319 printk(KERN_INFO "%s: 3Com 3c%s, io %#3lx, irq %d, "
320 "hw_addr %pM\n",
321 dev->name, (multi ? "562" : "589"), dev->base_addr, dev->irq,
322 dev->dev_addr);
323 printk(KERN_INFO " %dK FIFO split %s Rx:Tx, %s xcvr\n",
324 (fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3],
325 if_names[dev->if_port]);
326 return 0;
327
328 failed:
329 tc589_release(link);
330 return -ENODEV;
331 } /* tc589_config */
332
333 /*======================================================================
334
335 After a card is removed, tc589_release() will unregister the net
336 device, and release the PCMCIA configuration. If the device is
337 still open, this will be postponed until it is closed.
338
339 ======================================================================*/
340
341 static void tc589_release(struct pcmcia_device *link)
342 {
343 pcmcia_disable_device(link);
344 }
345
346 static int tc589_suspend(struct pcmcia_device *link)
347 {
348 struct net_device *dev = link->priv;
349
350 if (link->open)
351 netif_device_detach(dev);
352
353 return 0;
354 }
355
356 static int tc589_resume(struct pcmcia_device *link)
357 {
358 struct net_device *dev = link->priv;
359
360 if (link->open) {
361 tc589_reset(dev);
362 netif_device_attach(dev);
363 }
364
365 return 0;
366 }
367
368 /*====================================================================*/
369
370 /*
371 Use this for commands that may take time to finish
372 */
373 static void tc589_wait_for_completion(struct net_device *dev, int cmd)
374 {
375 int i = 100;
376 outw(cmd, dev->base_addr + EL3_CMD);
377 while (--i > 0)
378 if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break;
379 if (i == 0)
380 printk(KERN_WARNING "%s: command 0x%04x did not complete!\n",
381 dev->name, cmd);
382 }
383
384 /*
385 Read a word from the EEPROM using the regular EEPROM access register.
386 Assume that we are in register window zero.
387 */
388 static u16 read_eeprom(unsigned int ioaddr, int index)
389 {
390 int i;
391 outw(EEPROM_READ + index, ioaddr + 10);
392 /* Reading the eeprom takes 162 us */
393 for (i = 1620; i >= 0; i--)
394 if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
395 break;
396 return inw(ioaddr + 12);
397 }
398
399 /*
400 Set transceiver type, perhaps to something other than what the user
401 specified in dev->if_port.
402 */
403 static void tc589_set_xcvr(struct net_device *dev, int if_port)
404 {
405 struct el3_private *lp = netdev_priv(dev);
406 unsigned int ioaddr = dev->base_addr;
407
408 EL3WINDOW(0);
409 switch (if_port) {
410 case 0: case 1: outw(0, ioaddr + 6); break;
411 case 2: outw(3<<14, ioaddr + 6); break;
412 case 3: outw(1<<14, ioaddr + 6); break;
413 }
414 /* On PCMCIA, this just turns on the LED */
415 outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD);
416 /* 10baseT interface, enable link beat and jabber check. */
417 EL3WINDOW(4);
418 outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA);
419 EL3WINDOW(1);
420 if (if_port == 2)
421 lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000);
422 else
423 lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800);
424 }
425
426 static void dump_status(struct net_device *dev)
427 {
428 unsigned int ioaddr = dev->base_addr;
429 EL3WINDOW(1);
430 printk(KERN_INFO " irq status %04x, rx status %04x, tx status "
431 "%02x tx free %04x\n", inw(ioaddr+EL3_STATUS),
432 inw(ioaddr+RX_STATUS), inb(ioaddr+TX_STATUS),
433 inw(ioaddr+TX_FREE));
434 EL3WINDOW(4);
435 printk(KERN_INFO " diagnostics: fifo %04x net %04x ethernet %04x"
436 " media %04x\n", inw(ioaddr+0x04), inw(ioaddr+0x06),
437 inw(ioaddr+0x08), inw(ioaddr+0x0a));
438 EL3WINDOW(1);
439 }
440
441 /* Reset and restore all of the 3c589 registers. */
442 static void tc589_reset(struct net_device *dev)
443 {
444 unsigned int ioaddr = dev->base_addr;
445 int i;
446
447 EL3WINDOW(0);
448 outw(0x0001, ioaddr + 4); /* Activate board. */
449 outw(0x3f00, ioaddr + 8); /* Set the IRQ line. */
450
451 /* Set the station address in window 2. */
452 EL3WINDOW(2);
453 for (i = 0; i < 6; i++)
454 outb(dev->dev_addr[i], ioaddr + i);
455
456 tc589_set_xcvr(dev, dev->if_port);
457
458 /* Switch to the stats window, and clear all stats by reading. */
459 outw(StatsDisable, ioaddr + EL3_CMD);
460 EL3WINDOW(6);
461 for (i = 0; i < 9; i++)
462 inb(ioaddr+i);
463 inw(ioaddr + 10);
464 inw(ioaddr + 12);
465
466 /* Switch to register set 1 for normal use. */
467 EL3WINDOW(1);
468
469 set_rx_mode(dev);
470 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
471 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
472 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
473 /* Allow status bits to be seen. */
474 outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
475 /* Ack all pending events, and set active indicator mask. */
476 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
477 ioaddr + EL3_CMD);
478 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
479 | AdapterFailure, ioaddr + EL3_CMD);
480 }
481
482 static void netdev_get_drvinfo(struct net_device *dev,
483 struct ethtool_drvinfo *info)
484 {
485 strcpy(info->driver, DRV_NAME);
486 strcpy(info->version, DRV_VERSION);
487 sprintf(info->bus_info, "PCMCIA 0x%lx", dev->base_addr);
488 }
489
490 static const struct ethtool_ops netdev_ethtool_ops = {
491 .get_drvinfo = netdev_get_drvinfo,
492 };
493
494 static int el3_config(struct net_device *dev, struct ifmap *map)
495 {
496 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
497 if (map->port <= 3) {
498 dev->if_port = map->port;
499 printk(KERN_INFO "%s: switched to %s port\n",
500 dev->name, if_names[dev->if_port]);
501 tc589_set_xcvr(dev, dev->if_port);
502 } else
503 return -EINVAL;
504 }
505 return 0;
506 }
507
508 static int el3_open(struct net_device *dev)
509 {
510 struct el3_private *lp = netdev_priv(dev);
511 struct pcmcia_device *link = lp->p_dev;
512
513 if (!pcmcia_dev_present(link))
514 return -ENODEV;
515
516 link->open++;
517 netif_start_queue(dev);
518
519 tc589_reset(dev);
520 init_timer(&lp->media);
521 lp->media.function = &media_check;
522 lp->media.data = (unsigned long) dev;
523 lp->media.expires = jiffies + HZ;
524 add_timer(&lp->media);
525
526 dev_dbg(&link->dev, "%s: opened, status %4.4x.\n",
527 dev->name, inw(dev->base_addr + EL3_STATUS));
528
529 return 0;
530 }
531
532 static void el3_tx_timeout(struct net_device *dev)
533 {
534 unsigned int ioaddr = dev->base_addr;
535
536 printk(KERN_WARNING "%s: Transmit timed out!\n", dev->name);
537 dump_status(dev);
538 dev->stats.tx_errors++;
539 dev->trans_start = jiffies;
540 /* Issue TX_RESET and TX_START commands. */
541 tc589_wait_for_completion(dev, TxReset);
542 outw(TxEnable, ioaddr + EL3_CMD);
543 netif_wake_queue(dev);
544 }
545
546 static void pop_tx_status(struct net_device *dev)
547 {
548 unsigned int ioaddr = dev->base_addr;
549 int i;
550
551 /* Clear the Tx status stack. */
552 for (i = 32; i > 0; i--) {
553 u_char tx_status = inb(ioaddr + TX_STATUS);
554 if (!(tx_status & 0x84)) break;
555 /* reset transmitter on jabber error or underrun */
556 if (tx_status & 0x30)
557 tc589_wait_for_completion(dev, TxReset);
558 if (tx_status & 0x38) {
559 pr_debug("%s: transmit error: status 0x%02x\n",
560 dev->name, tx_status);
561 outw(TxEnable, ioaddr + EL3_CMD);
562 dev->stats.tx_aborted_errors++;
563 }
564 outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
565 }
566 }
567
568 static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
569 struct net_device *dev)
570 {
571 unsigned int ioaddr = dev->base_addr;
572 struct el3_private *priv = netdev_priv(dev);
573 unsigned long flags;
574
575 pr_debug("%s: el3_start_xmit(length = %ld) called, "
576 "status %4.4x.\n", dev->name, (long)skb->len,
577 inw(ioaddr + EL3_STATUS));
578
579 spin_lock_irqsave(&priv->lock, flags);
580
581 dev->stats.tx_bytes += skb->len;
582
583 /* Put out the doubleword header... */
584 outw(skb->len, ioaddr + TX_FIFO);
585 outw(0x00, ioaddr + TX_FIFO);
586 /* ... and the packet rounded to a doubleword. */
587 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
588
589 dev->trans_start = jiffies;
590 if (inw(ioaddr + TX_FREE) <= 1536) {
591 netif_stop_queue(dev);
592 /* Interrupt us when the FIFO has room for max-sized packet. */
593 outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
594 }
595
596 pop_tx_status(dev);
597 spin_unlock_irqrestore(&priv->lock, flags);
598 dev_kfree_skb(skb);
599
600 return NETDEV_TX_OK;
601 }
602
603 /* The EL3 interrupt handler. */
604 static irqreturn_t el3_interrupt(int irq, void *dev_id)
605 {
606 struct net_device *dev = (struct net_device *) dev_id;
607 struct el3_private *lp = netdev_priv(dev);
608 unsigned int ioaddr;
609 __u16 status;
610 int i = 0, handled = 1;
611
612 if (!netif_device_present(dev))
613 return IRQ_NONE;
614
615 ioaddr = dev->base_addr;
616
617 pr_debug("%s: interrupt, status %4.4x.\n",
618 dev->name, inw(ioaddr + EL3_STATUS));
619
620 spin_lock(&lp->lock);
621 while ((status = inw(ioaddr + EL3_STATUS)) &
622 (IntLatch | RxComplete | StatsFull)) {
623 if ((status & 0xe000) != 0x2000) {
624 pr_debug("%s: interrupt from dead card\n", dev->name);
625 handled = 0;
626 break;
627 }
628
629 if (status & RxComplete)
630 el3_rx(dev);
631
632 if (status & TxAvailable) {
633 pr_debug(" TX room bit was handled.\n");
634 /* There's room in the FIFO for a full-sized packet. */
635 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
636 netif_wake_queue(dev);
637 }
638
639 if (status & TxComplete)
640 pop_tx_status(dev);
641
642 if (status & (AdapterFailure | RxEarly | StatsFull)) {
643 /* Handle all uncommon interrupts. */
644 if (status & StatsFull) /* Empty statistics. */
645 update_stats(dev);
646 if (status & RxEarly) { /* Rx early is unused. */
647 el3_rx(dev);
648 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
649 }
650 if (status & AdapterFailure) {
651 u16 fifo_diag;
652 EL3WINDOW(4);
653 fifo_diag = inw(ioaddr + 4);
654 EL3WINDOW(1);
655 printk(KERN_WARNING "%s: adapter failure, FIFO diagnostic"
656 " register %04x.\n", dev->name, fifo_diag);
657 if (fifo_diag & 0x0400) {
658 /* Tx overrun */
659 tc589_wait_for_completion(dev, TxReset);
660 outw(TxEnable, ioaddr + EL3_CMD);
661 }
662 if (fifo_diag & 0x2000) {
663 /* Rx underrun */
664 tc589_wait_for_completion(dev, RxReset);
665 set_rx_mode(dev);
666 outw(RxEnable, ioaddr + EL3_CMD);
667 }
668 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
669 }
670 }
671
672 if (++i > 10) {
673 printk(KERN_ERR "%s: infinite loop in interrupt, "
674 "status %4.4x.\n", dev->name, status);
675 /* Clear all interrupts */
676 outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
677 break;
678 }
679 /* Acknowledge the IRQ. */
680 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
681 }
682
683 lp->last_irq = jiffies;
684 spin_unlock(&lp->lock);
685 pr_debug("%s: exiting interrupt, status %4.4x.\n",
686 dev->name, inw(ioaddr + EL3_STATUS));
687 return IRQ_RETVAL(handled);
688 }
689
690 static void media_check(unsigned long arg)
691 {
692 struct net_device *dev = (struct net_device *)(arg);
693 struct el3_private *lp = netdev_priv(dev);
694 unsigned int ioaddr = dev->base_addr;
695 u16 media, errs;
696 unsigned long flags;
697
698 if (!netif_device_present(dev)) goto reschedule;
699
700 /* Check for pending interrupt with expired latency timer: with
701 this, we can limp along even if the interrupt is blocked */
702 if ((inw(ioaddr + EL3_STATUS) & IntLatch) &&
703 (inb(ioaddr + EL3_TIMER) == 0xff)) {
704 if (!lp->fast_poll)
705 printk(KERN_WARNING "%s: interrupt(s) dropped!\n", dev->name);
706
707 local_irq_save(flags);
708 el3_interrupt(dev->irq, dev);
709 local_irq_restore(flags);
710
711 lp->fast_poll = HZ;
712 }
713 if (lp->fast_poll) {
714 lp->fast_poll--;
715 lp->media.expires = jiffies + HZ/100;
716 add_timer(&lp->media);
717 return;
718 }
719
720 /* lp->lock guards the EL3 window. Window should always be 1 except
721 when the lock is held */
722 spin_lock_irqsave(&lp->lock, flags);
723 EL3WINDOW(4);
724 media = inw(ioaddr+WN4_MEDIA) & 0xc810;
725
726 /* Ignore collisions unless we've had no irq's recently */
727 if (time_before(jiffies, lp->last_irq + HZ)) {
728 media &= ~0x0010;
729 } else {
730 /* Try harder to detect carrier errors */
731 EL3WINDOW(6);
732 outw(StatsDisable, ioaddr + EL3_CMD);
733 errs = inb(ioaddr + 0);
734 outw(StatsEnable, ioaddr + EL3_CMD);
735 dev->stats.tx_carrier_errors += errs;
736 if (errs || (lp->media_status & 0x0010)) media |= 0x0010;
737 }
738
739 if (media != lp->media_status) {
740 if ((media & lp->media_status & 0x8000) &&
741 ((lp->media_status ^ media) & 0x0800))
742 printk(KERN_INFO "%s: %s link beat\n", dev->name,
743 (lp->media_status & 0x0800 ? "lost" : "found"));
744 else if ((media & lp->media_status & 0x4000) &&
745 ((lp->media_status ^ media) & 0x0010))
746 printk(KERN_INFO "%s: coax cable %s\n", dev->name,
747 (lp->media_status & 0x0010 ? "ok" : "problem"));
748 if (dev->if_port == 0) {
749 if (media & 0x8000) {
750 if (media & 0x0800)
751 printk(KERN_INFO "%s: flipped to 10baseT\n",
752 dev->name);
753 else
754 tc589_set_xcvr(dev, 2);
755 } else if (media & 0x4000) {
756 if (media & 0x0010)
757 tc589_set_xcvr(dev, 1);
758 else
759 printk(KERN_INFO "%s: flipped to 10base2\n",
760 dev->name);
761 }
762 }
763 lp->media_status = media;
764 }
765
766 EL3WINDOW(1);
767 spin_unlock_irqrestore(&lp->lock, flags);
768
769 reschedule:
770 lp->media.expires = jiffies + HZ;
771 add_timer(&lp->media);
772 }
773
774 static struct net_device_stats *el3_get_stats(struct net_device *dev)
775 {
776 struct el3_private *lp = netdev_priv(dev);
777 unsigned long flags;
778 struct pcmcia_device *link = lp->p_dev;
779
780 if (pcmcia_dev_present(link)) {
781 spin_lock_irqsave(&lp->lock, flags);
782 update_stats(dev);
783 spin_unlock_irqrestore(&lp->lock, flags);
784 }
785 return &dev->stats;
786 }
787
788 /*
789 Update statistics. We change to register window 6, so this should be run
790 single-threaded if the device is active. This is expected to be a rare
791 operation, and it's simpler for the rest of the driver to assume that
792 window 1 is always valid rather than use a special window-state variable.
793
794 Caller must hold the lock for this
795 */
796 static void update_stats(struct net_device *dev)
797 {
798 unsigned int ioaddr = dev->base_addr;
799
800 pr_debug("%s: updating the statistics.\n", dev->name);
801 /* Turn off statistics updates while reading. */
802 outw(StatsDisable, ioaddr + EL3_CMD);
803 /* Switch to the stats window, and read everything. */
804 EL3WINDOW(6);
805 dev->stats.tx_carrier_errors += inb(ioaddr + 0);
806 dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
807 /* Multiple collisions. */ inb(ioaddr + 2);
808 dev->stats.collisions += inb(ioaddr + 3);
809 dev->stats.tx_window_errors += inb(ioaddr + 4);
810 dev->stats.rx_fifo_errors += inb(ioaddr + 5);
811 dev->stats.tx_packets += inb(ioaddr + 6);
812 /* Rx packets */ inb(ioaddr + 7);
813 /* Tx deferrals */ inb(ioaddr + 8);
814 /* Rx octets */ inw(ioaddr + 10);
815 /* Tx octets */ inw(ioaddr + 12);
816
817 /* Back to window 1, and turn statistics back on. */
818 EL3WINDOW(1);
819 outw(StatsEnable, ioaddr + EL3_CMD);
820 }
821
822 static int el3_rx(struct net_device *dev)
823 {
824 unsigned int ioaddr = dev->base_addr;
825 int worklimit = 32;
826 short rx_status;
827
828 pr_debug("%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n",
829 dev->name, inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
830 while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
831 worklimit > 0) {
832 worklimit--;
833 if (rx_status & 0x4000) { /* Error, update stats. */
834 short error = rx_status & 0x3800;
835 dev->stats.rx_errors++;
836 switch (error) {
837 case 0x0000: dev->stats.rx_over_errors++; break;
838 case 0x0800: dev->stats.rx_length_errors++; break;
839 case 0x1000: dev->stats.rx_frame_errors++; break;
840 case 0x1800: dev->stats.rx_length_errors++; break;
841 case 0x2000: dev->stats.rx_frame_errors++; break;
842 case 0x2800: dev->stats.rx_crc_errors++; break;
843 }
844 } else {
845 short pkt_len = rx_status & 0x7ff;
846 struct sk_buff *skb;
847
848 skb = dev_alloc_skb(pkt_len+5);
849
850 pr_debug(" Receiving packet size %d status %4.4x.\n",
851 pkt_len, rx_status);
852 if (skb != NULL) {
853 skb_reserve(skb, 2);
854 insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
855 (pkt_len+3)>>2);
856 skb->protocol = eth_type_trans(skb, dev);
857 netif_rx(skb);
858 dev->stats.rx_packets++;
859 dev->stats.rx_bytes += pkt_len;
860 } else {
861 pr_debug("%s: couldn't allocate a sk_buff of"
862 " size %d.\n", dev->name, pkt_len);
863 dev->stats.rx_dropped++;
864 }
865 }
866 /* Pop the top of the Rx FIFO */
867 tc589_wait_for_completion(dev, RxDiscard);
868 }
869 if (worklimit == 0)
870 printk(KERN_WARNING "%s: too much work in el3_rx!\n", dev->name);
871 return 0;
872 }
873
874 static void set_rx_mode(struct net_device *dev)
875 {
876 unsigned int ioaddr = dev->base_addr;
877 u16 opts = SetRxFilter | RxStation | RxBroadcast;
878
879 if (dev->flags & IFF_PROMISC)
880 opts |= RxMulticast | RxProm;
881 else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI))
882 opts |= RxMulticast;
883 outw(opts, ioaddr + EL3_CMD);
884 }
885
886 static void set_multicast_list(struct net_device *dev)
887 {
888 struct el3_private *priv = netdev_priv(dev);
889 unsigned long flags;
890
891 spin_lock_irqsave(&priv->lock, flags);
892 set_rx_mode(dev);
893 spin_unlock_irqrestore(&priv->lock, flags);
894 }
895
896 static int el3_close(struct net_device *dev)
897 {
898 struct el3_private *lp = netdev_priv(dev);
899 struct pcmcia_device *link = lp->p_dev;
900 unsigned int ioaddr = dev->base_addr;
901
902 dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name);
903
904 if (pcmcia_dev_present(link)) {
905 /* Turn off statistics ASAP. We update dev->stats below. */
906 outw(StatsDisable, ioaddr + EL3_CMD);
907
908 /* Disable the receiver and transmitter. */
909 outw(RxDisable, ioaddr + EL3_CMD);
910 outw(TxDisable, ioaddr + EL3_CMD);
911
912 if (dev->if_port == 2)
913 /* Turn off thinnet power. Green! */
914 outw(StopCoax, ioaddr + EL3_CMD);
915 else if (dev->if_port == 1) {
916 /* Disable link beat and jabber */
917 EL3WINDOW(4);
918 outw(0, ioaddr + WN4_MEDIA);
919 }
920
921 /* Switching back to window 0 disables the IRQ. */
922 EL3WINDOW(0);
923 /* But we explicitly zero the IRQ line select anyway. */
924 outw(0x0f00, ioaddr + WN0_IRQ);
925
926 /* Check if the card still exists */
927 if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000)
928 update_stats(dev);
929 }
930
931 link->open--;
932 netif_stop_queue(dev);
933 del_timer_sync(&lp->media);
934
935 return 0;
936 }
937
938 static struct pcmcia_device_id tc589_ids[] = {
939 PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562),
940 PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77),
941 PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589),
942 PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202),
943 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "cis/3CXEM556.cis"),
944 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "cis/3CXEM556.cis"),
945 PCMCIA_DEVICE_NULL,
946 };
947 MODULE_DEVICE_TABLE(pcmcia, tc589_ids);
948
949 static struct pcmcia_driver tc589_driver = {
950 .owner = THIS_MODULE,
951 .drv = {
952 .name = "3c589_cs",
953 },
954 .probe = tc589_probe,
955 .remove = tc589_detach,
956 .id_table = tc589_ids,
957 .suspend = tc589_suspend,
958 .resume = tc589_resume,
959 };
960
961 static int __init init_tc589(void)
962 {
963 return pcmcia_register_driver(&tc589_driver);
964 }
965
966 static void __exit exit_tc589(void)
967 {
968 pcmcia_unregister_driver(&tc589_driver);
969 }
970
971 module_init(init_tc589);
972 module_exit(exit_tc589);
Linux kernel - Deliverables
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