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
23#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
25#define DRV_NAME "3c589_cs"
26
27#include <linux/module.h>
28#include <linux/kernel.h>
29#include <linux/ptrace.h>
30#include <linux/slab.h>
31#include <linux/string.h>
32#include <linux/timer.h>
33#include <linux/interrupt.h>
34#include <linux/in.h>
35#include <linux/delay.h>
36#include <linux/ethtool.h>
37#include <linux/netdevice.h>
38#include <linux/etherdevice.h>
39#include <linux/skbuff.h>
40#include <linux/if_arp.h>
41#include <linux/ioport.h>
42#include <linux/bitops.h>
43#include <linux/jiffies.h>
44#include <linux/uaccess.h>
45#include <linux/io.h>
46
47#include <pcmcia/cistpl.h>
48#include <pcmcia/cisreg.h>
49#include <pcmcia/ciscode.h>
50#include <pcmcia/ds.h>
51
52
53/* To minimize the size of the driver source I only define operating
54 * constants if they are used several times. You'll need the manual
55 * if you want to understand driver details.
56 */
57
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 */
72
73enum c509cmd {
74 TotalReset = 0<<11,
75 SelectWindow = 1<<11,
76 StartCoax = 2<<11,
77 RxDisable = 3<<11,
78 RxEnable = 4<<11,
79 RxReset = 5<<11,
80 RxDiscard = 8<<11,
81 TxEnable = 9<<11,
82 TxDisable = 10<<11,
83 TxReset = 11<<11,
84 FakeIntr = 12<<11,
85 AckIntr = 13<<11,
86 SetIntrEnb = 14<<11,
87 SetStatusEnb = 15<<11,
88 SetRxFilter = 16<<11,
89 SetRxThreshold = 17<<11,
90 SetTxThreshold = 18<<11,
91 SetTxStart = 19<<11,
92 StatsEnable = 21<<11,
93 StatsDisable = 22<<11,
94 StopCoax = 23<<11
95};
96
97enum c509status {
98 IntLatch = 0x0001,
99 AdapterFailure = 0x0002,
100 TxComplete = 0x0004,
101 TxAvailable = 0x0008,
102 RxComplete = 0x0010,
103 RxEarly = 0x0020,
104 IntReq = 0x0040,
105 StatsFull = 0x0080,
106 CmdBusy = 0x1000
107};
108
109/* The SetRxFilter command accepts the following classes: */
110enum RxFilter {
111 RxStation = 1,
112 RxMulticast = 2,
113 RxBroadcast = 4,
114 RxProm = 8
115};
116
117/* Register window 1 offsets, the window used in normal operation. */
118#define TX_FIFO 0x00
119#define RX_FIFO 0x00
120#define RX_STATUS 0x08
121#define TX_STATUS 0x0B
122#define TX_FREE 0x0C /* Remaining free bytes in Tx buffer. */
123
124#define WN0_IRQ 0x08 /* Window 0: Set IRQ line in bits 12-15. */
125#define WN4_MEDIA 0x0A /* Window 4: Various transcvr/media bits. */
126#define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */
127#define MEDIA_LED 0x0001 /* Enable link light on 3C589E cards. */
128
129/* Time in jiffies before concluding Tx hung */
130#define TX_TIMEOUT ((400*HZ)/1000)
131
132struct el3_private {
133 struct pcmcia_device *p_dev;
134 /* For transceiver monitoring */
135 struct timer_list media;
136 u16 media_status;
137 u16 fast_poll;
138 unsigned long last_irq;
139 spinlock_t lock;
140};
141
142static const char *if_names[] = { "auto", "10baseT", "10base2", "AUI" };
143
144/*====================================================================*/
145
146/* Module parameters */
147
148MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
149MODULE_DESCRIPTION("3Com 3c589 series PCMCIA ethernet driver");
150MODULE_LICENSE("GPL");
151
152#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
153
154/* Special hook for setting if_port when module is loaded */
155INT_MODULE_PARM(if_port, 0);
156
157
158/*====================================================================*/
159
160static int tc589_config(struct pcmcia_device *link);
161static void tc589_release(struct pcmcia_device *link);
162
163static u16 read_eeprom(unsigned int ioaddr, int index);
164static void tc589_reset(struct net_device *dev);
165static void media_check(struct timer_list *t);
166static int el3_config(struct net_device *dev, struct ifmap *map);
167static int el3_open(struct net_device *dev);
168static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
169 struct net_device *dev);
170static irqreturn_t el3_interrupt(int irq, void *dev_id);
171static void update_stats(struct net_device *dev);
172static struct net_device_stats *el3_get_stats(struct net_device *dev);
173static int el3_rx(struct net_device *dev);
174static int el3_close(struct net_device *dev);
175static void el3_tx_timeout(struct net_device *dev, unsigned int txqueue);
176static void set_rx_mode(struct net_device *dev);
177static void set_multicast_list(struct net_device *dev);
178static const struct ethtool_ops netdev_ethtool_ops;
179
180static void tc589_detach(struct pcmcia_device *p_dev);
181
182static const struct net_device_ops el3_netdev_ops = {
183 .ndo_open = el3_open,
184 .ndo_stop = el3_close,
185 .ndo_start_xmit = el3_start_xmit,
186 .ndo_tx_timeout = el3_tx_timeout,
187 .ndo_set_config = el3_config,
188 .ndo_get_stats = el3_get_stats,
189 .ndo_set_rx_mode = set_multicast_list,
190 .ndo_set_mac_address = eth_mac_addr,
191 .ndo_validate_addr = eth_validate_addr,
192};
193
194static int tc589_probe(struct pcmcia_device *link)
195{
196 struct el3_private *lp;
197 struct net_device *dev;
198 int ret;
199
200 dev_dbg(&link->dev, "3c589_attach()\n");
201
202 /* Create new ethernet device */
203 dev = alloc_etherdev(sizeof(struct el3_private));
204 if (!dev)
205 return -ENOMEM;
206 lp = netdev_priv(dev);
207 link->priv = dev;
208 lp->p_dev = link;
209
210 spin_lock_init(&lp->lock);
211 link->resource[0]->end = 16;
212 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_16;
213
214 link->config_flags |= CONF_ENABLE_IRQ;
215 link->config_index = 1;
216
217 dev->netdev_ops = &el3_netdev_ops;
218 dev->watchdog_timeo = TX_TIMEOUT;
219
220 dev->ethtool_ops = &netdev_ethtool_ops;
221
222 ret = tc589_config(link);
223 if (ret)
224 goto err_free_netdev;
225
226 return 0;
227
228err_free_netdev:
229 free_netdev(dev);
230 return ret;
231}
232
233static void tc589_detach(struct pcmcia_device *link)
234{
235 struct net_device *dev = link->priv;
236
237 dev_dbg(&link->dev, "3c589_detach\n");
238
239 unregister_netdev(dev);
240
241 tc589_release(link);
242
243 free_netdev(dev);
244} /* tc589_detach */
245
246static int tc589_config(struct pcmcia_device *link)
247{
248 struct net_device *dev = link->priv;
249 int ret, i, j, multi = 0, fifo;
250 __be16 addr[ETH_ALEN / 2];
251 unsigned int ioaddr;
252 static const char * const ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
253 u8 *buf;
254 size_t len;
255
256 dev_dbg(&link->dev, "3c589_config\n");
257
258 /* Is this a 3c562? */
259 if (link->manf_id != MANFID_3COM)
260 dev_info(&link->dev, "hmmm, is this really a 3Com card??\n");
261 multi = (link->card_id == PRODID_3COM_3C562);
262
263 link->io_lines = 16;
264
265 /* For the 3c562, the base address must be xx00-xx7f */
266 for (i = j = 0; j < 0x400; j += 0x10) {
267 if (multi && (j & 0x80))
268 continue;
269 link->resource[0]->start = j ^ 0x300;
270 i = pcmcia_request_io(p_dev: link);
271 if (i == 0)
272 break;
273 }
274 if (i != 0)
275 goto failed;
276
277 ret = pcmcia_request_irq(p_dev: link, handler: el3_interrupt);
278 if (ret)
279 goto failed;
280
281 ret = pcmcia_enable_device(p_dev: link);
282 if (ret)
283 goto failed;
284
285 dev->irq = link->irq;
286 dev->base_addr = link->resource[0]->start;
287 ioaddr = dev->base_addr;
288 EL3WINDOW(0);
289
290 /* The 3c589 has an extra EEPROM for configuration info, including
291 * the hardware address. The 3c562 puts the address in the CIS.
292 */
293 len = pcmcia_get_tuple(p_dev: link, code: 0x88, buf: &buf);
294 if (buf && len >= 6) {
295 for (i = 0; i < 3; i++)
296 addr[i] = htons(le16_to_cpu(buf[i*2]));
297 kfree(objp: buf);
298 } else {
299 kfree(objp: buf); /* 0 < len < 6 */
300 for (i = 0; i < 3; i++)
301 addr[i] = htons(read_eeprom(ioaddr, i));
302 if (addr[0] == htons(0x6060)) {
303 dev_err(&link->dev, "IO port conflict at 0x%03lx-0x%03lx\n",
304 dev->base_addr, dev->base_addr+15);
305 goto failed;
306 }
307 }
308 eth_hw_addr_set(dev, addr: (u8 *)addr);
309
310 /* The address and resource configuration register aren't loaded from
311 * the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version.
312 */
313
314 outw(value: 0x3f00, port: ioaddr + 8);
315 fifo = inl(port: ioaddr);
316
317 /* The if_port symbol can be set when the module is loaded */
318 if ((if_port >= 0) && (if_port <= 3))
319 dev->if_port = if_port;
320 else
321 dev_err(&link->dev, "invalid if_port requested\n");
322
323 SET_NETDEV_DEV(dev, &link->dev);
324
325 if (register_netdev(dev) != 0) {
326 dev_err(&link->dev, "register_netdev() failed\n");
327 goto failed;
328 }
329
330 netdev_info(dev, format: "3Com 3c%s, io %#3lx, irq %d, hw_addr %pM\n",
331 (multi ? "562" : "589"), dev->base_addr, dev->irq,
332 dev->dev_addr);
333 netdev_info(dev, format: " %dK FIFO split %s Rx:Tx, %s xcvr\n",
334 (fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3],
335 if_names[dev->if_port]);
336 return 0;
337
338failed:
339 tc589_release(link);
340 return -ENODEV;
341} /* tc589_config */
342
343static void tc589_release(struct pcmcia_device *link)
344{
345 pcmcia_disable_device(p_dev: link);
346}
347
348static int tc589_suspend(struct pcmcia_device *link)
349{
350 struct net_device *dev = link->priv;
351
352 if (link->open)
353 netif_device_detach(dev);
354
355 return 0;
356}
357
358static int tc589_resume(struct pcmcia_device *link)
359{
360 struct net_device *dev = link->priv;
361
362 if (link->open) {
363 tc589_reset(dev);
364 netif_device_attach(dev);
365 }
366
367 return 0;
368}
369
370/*====================================================================*/
371
372/* Use this for commands that may take time to finish */
373
374static void tc589_wait_for_completion(struct net_device *dev, int cmd)
375{
376 int i = 100;
377 outw(value: cmd, port: dev->base_addr + EL3_CMD);
378 while (--i > 0)
379 if (!(inw(port: dev->base_addr + EL3_STATUS) & 0x1000))
380 break;
381 if (i == 0)
382 netdev_warn(dev, format: "command 0x%04x did not complete!\n", cmd);
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
389static u16 read_eeprom(unsigned int ioaddr, int index)
390{
391 int i;
392 outw(EEPROM_READ + index, port: ioaddr + 10);
393 /* Reading the eeprom takes 162 us */
394 for (i = 1620; i >= 0; i--)
395 if ((inw(port: ioaddr + 10) & EEPROM_BUSY) == 0)
396 break;
397 return inw(port: ioaddr + 12);
398}
399
400/* Set transceiver type, perhaps to something other than what the user
401 * specified in dev->if_port.
402 */
403
404static void tc589_set_xcvr(struct net_device *dev, int if_port)
405{
406 struct el3_private *lp = netdev_priv(dev);
407 unsigned int ioaddr = dev->base_addr;
408
409 EL3WINDOW(0);
410 switch (if_port) {
411 case 0:
412 case 1:
413 outw(value: 0, port: ioaddr + 6);
414 break;
415 case 2:
416 outw(value: 3<<14, port: ioaddr + 6);
417 break;
418 case 3:
419 outw(value: 1<<14, port: ioaddr + 6);
420 break;
421 }
422 /* On PCMCIA, this just turns on the LED */
423 outw(value: (if_port == 2) ? StartCoax : StopCoax, port: ioaddr + EL3_CMD);
424 /* 10baseT interface, enable link beat and jabber check. */
425 EL3WINDOW(4);
426 outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), port: ioaddr + WN4_MEDIA);
427 EL3WINDOW(1);
428 if (if_port == 2)
429 lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000);
430 else
431 lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800);
432}
433
434static void dump_status(struct net_device *dev)
435{
436 unsigned int ioaddr = dev->base_addr;
437 EL3WINDOW(1);
438 netdev_info(dev, format: " irq status %04x, rx status %04x, tx status %02x tx free %04x\n",
439 inw(port: ioaddr+EL3_STATUS), inw(port: ioaddr+RX_STATUS),
440 inb(port: ioaddr+TX_STATUS), inw(port: ioaddr+TX_FREE));
441 EL3WINDOW(4);
442 netdev_info(dev, format: " diagnostics: fifo %04x net %04x ethernet %04x media %04x\n",
443 inw(port: ioaddr+0x04), inw(port: ioaddr+0x06), inw(port: ioaddr+0x08),
444 inw(port: ioaddr+0x0a));
445 EL3WINDOW(1);
446}
447
448/* Reset and restore all of the 3c589 registers. */
449static void tc589_reset(struct net_device *dev)
450{
451 unsigned int ioaddr = dev->base_addr;
452 int i;
453
454 EL3WINDOW(0);
455 outw(value: 0x0001, port: ioaddr + 4); /* Activate board. */
456 outw(value: 0x3f00, port: ioaddr + 8); /* Set the IRQ line. */
457
458 /* Set the station address in window 2. */
459 EL3WINDOW(2);
460 for (i = 0; i < 6; i++)
461 outb(value: dev->dev_addr[i], port: ioaddr + i);
462
463 tc589_set_xcvr(dev, if_port: dev->if_port);
464
465 /* Switch to the stats window, and clear all stats by reading. */
466 outw(value: StatsDisable, port: ioaddr + EL3_CMD);
467 EL3WINDOW(6);
468 for (i = 0; i < 9; i++)
469 inb(port: ioaddr+i);
470 inw(port: ioaddr + 10);
471 inw(port: ioaddr + 12);
472
473 /* Switch to register set 1 for normal use. */
474 EL3WINDOW(1);
475
476 set_rx_mode(dev);
477 outw(value: StatsEnable, port: ioaddr + EL3_CMD); /* Turn on statistics. */
478 outw(value: RxEnable, port: ioaddr + EL3_CMD); /* Enable the receiver. */
479 outw(value: TxEnable, port: ioaddr + EL3_CMD); /* Enable transmitter. */
480 /* Allow status bits to be seen. */
481 outw(value: SetStatusEnb | 0xff, port: ioaddr + EL3_CMD);
482 /* Ack all pending events, and set active indicator mask. */
483 outw(value: AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
484 port: ioaddr + EL3_CMD);
485 outw(value: SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
486 | AdapterFailure, port: ioaddr + EL3_CMD);
487}
488
489static void netdev_get_drvinfo(struct net_device *dev,
490 struct ethtool_drvinfo *info)
491{
492 strscpy(p: info->driver, DRV_NAME, size: sizeof(info->driver));
493 snprintf(buf: info->bus_info, size: sizeof(info->bus_info),
494 fmt: "PCMCIA 0x%lx", dev->base_addr);
495}
496
497static const struct ethtool_ops netdev_ethtool_ops = {
498 .get_drvinfo = netdev_get_drvinfo,
499};
500
501static int el3_config(struct net_device *dev, struct ifmap *map)
502{
503 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
504 if (map->port <= 3) {
505 dev->if_port = map->port;
506 netdev_info(dev, format: "switched to %s port\n", if_names[dev->if_port]);
507 tc589_set_xcvr(dev, if_port: dev->if_port);
508 } else {
509 return -EINVAL;
510 }
511 }
512 return 0;
513}
514
515static int el3_open(struct net_device *dev)
516{
517 struct el3_private *lp = netdev_priv(dev);
518 struct pcmcia_device *link = lp->p_dev;
519
520 if (!pcmcia_dev_present(p_dev: link))
521 return -ENODEV;
522
523 link->open++;
524 netif_start_queue(dev);
525
526 tc589_reset(dev);
527 timer_setup(&lp->media, media_check, 0);
528 mod_timer(timer: &lp->media, expires: jiffies + HZ);
529
530 dev_dbg(&link->dev, "%s: opened, status %4.4x.\n",
531 dev->name, inw(dev->base_addr + EL3_STATUS));
532
533 return 0;
534}
535
536static void el3_tx_timeout(struct net_device *dev, unsigned int txqueue)
537{
538 unsigned int ioaddr = dev->base_addr;
539
540 netdev_warn(dev, format: "Transmit timed out!\n");
541 dump_status(dev);
542 dev->stats.tx_errors++;
543 netif_trans_update(dev); /* prevent tx timeout */
544 /* Issue TX_RESET and TX_START commands. */
545 tc589_wait_for_completion(dev, cmd: TxReset);
546 outw(value: TxEnable, port: ioaddr + EL3_CMD);
547 netif_wake_queue(dev);
548}
549
550static void pop_tx_status(struct net_device *dev)
551{
552 unsigned int ioaddr = dev->base_addr;
553 int i;
554
555 /* Clear the Tx status stack. */
556 for (i = 32; i > 0; i--) {
557 u_char tx_status = inb(port: ioaddr + TX_STATUS);
558 if (!(tx_status & 0x84))
559 break;
560 /* reset transmitter on jabber error or underrun */
561 if (tx_status & 0x30)
562 tc589_wait_for_completion(dev, cmd: TxReset);
563 if (tx_status & 0x38) {
564 netdev_dbg(dev, "transmit error: status 0x%02x\n", tx_status);
565 outw(value: TxEnable, port: ioaddr + EL3_CMD);
566 dev->stats.tx_aborted_errors++;
567 }
568 outb(value: 0x00, port: ioaddr + TX_STATUS); /* Pop the status stack. */
569 }
570}
571
572static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
573 struct net_device *dev)
574{
575 unsigned int ioaddr = dev->base_addr;
576 struct el3_private *priv = netdev_priv(dev);
577 unsigned long flags;
578
579 netdev_dbg(dev, "el3_start_xmit(length = %ld) called, status %4.4x.\n",
580 (long)skb->len, inw(ioaddr + EL3_STATUS));
581
582 spin_lock_irqsave(&priv->lock, flags);
583
584 dev->stats.tx_bytes += skb->len;
585
586 /* Put out the doubleword header... */
587 outw(value: skb->len, port: ioaddr + TX_FIFO);
588 outw(value: 0x00, port: ioaddr + TX_FIFO);
589 /* ... and the packet rounded to a doubleword. */
590 outsl(port: ioaddr + TX_FIFO, addr: skb->data, count: (skb->len + 3) >> 2);
591
592 if (inw(port: ioaddr + TX_FREE) <= 1536) {
593 netif_stop_queue(dev);
594 /* Interrupt us when the FIFO has room for max-sized packet. */
595 outw(value: SetTxThreshold + 1536, port: ioaddr + EL3_CMD);
596 }
597
598 pop_tx_status(dev);
599 spin_unlock_irqrestore(lock: &priv->lock, flags);
600 dev_kfree_skb(skb);
601
602 return NETDEV_TX_OK;
603}
604
605/* The EL3 interrupt handler. */
606static irqreturn_t el3_interrupt(int irq, void *dev_id)
607{
608 struct net_device *dev = (struct net_device *) dev_id;
609 struct el3_private *lp = netdev_priv(dev);
610 unsigned int ioaddr;
611 __u16 status;
612 int i = 0, handled = 1;
613
614 if (!netif_device_present(dev))
615 return IRQ_NONE;
616
617 ioaddr = dev->base_addr;
618
619 netdev_dbg(dev, "interrupt, status %4.4x.\n", inw(ioaddr + EL3_STATUS));
620
621 spin_lock(lock: &lp->lock);
622 while ((status = inw(port: ioaddr + EL3_STATUS)) &
623 (IntLatch | RxComplete | StatsFull)) {
624 if ((status & 0xe000) != 0x2000) {
625 netdev_dbg(dev, "interrupt from dead card\n");
626 handled = 0;
627 break;
628 }
629 if (status & RxComplete)
630 el3_rx(dev);
631 if (status & TxAvailable) {
632 netdev_dbg(dev, " TX room bit was handled.\n");
633 /* There's room in the FIFO for a full-sized packet. */
634 outw(value: AckIntr | TxAvailable, port: ioaddr + EL3_CMD);
635 netif_wake_queue(dev);
636 }
637 if (status & TxComplete)
638 pop_tx_status(dev);
639 if (status & (AdapterFailure | RxEarly | StatsFull)) {
640 /* Handle all uncommon interrupts. */
641 if (status & StatsFull) /* Empty statistics. */
642 update_stats(dev);
643 if (status & RxEarly) {
644 /* Rx early is unused. */
645 el3_rx(dev);
646 outw(value: AckIntr | RxEarly, port: ioaddr + EL3_CMD);
647 }
648 if (status & AdapterFailure) {
649 u16 fifo_diag;
650 EL3WINDOW(4);
651 fifo_diag = inw(port: ioaddr + 4);
652 EL3WINDOW(1);
653 netdev_warn(dev, format: "adapter failure, FIFO diagnostic register %04x.\n",
654 fifo_diag);
655 if (fifo_diag & 0x0400) {
656 /* Tx overrun */
657 tc589_wait_for_completion(dev, cmd: TxReset);
658 outw(value: TxEnable, port: ioaddr + EL3_CMD);
659 }
660 if (fifo_diag & 0x2000) {
661 /* Rx underrun */
662 tc589_wait_for_completion(dev, cmd: RxReset);
663 set_rx_mode(dev);
664 outw(value: RxEnable, port: ioaddr + EL3_CMD);
665 }
666 outw(value: AckIntr | AdapterFailure, port: ioaddr + EL3_CMD);
667 }
668 }
669 if (++i > 10) {
670 netdev_err(dev, format: "infinite loop in interrupt, status %4.4x.\n",
671 status);
672 /* Clear all interrupts */
673 outw(value: AckIntr | 0xFF, port: ioaddr + EL3_CMD);
674 break;
675 }
676 /* Acknowledge the IRQ. */
677 outw(value: AckIntr | IntReq | IntLatch, port: ioaddr + EL3_CMD);
678 }
679 lp->last_irq = jiffies;
680 spin_unlock(lock: &lp->lock);
681 netdev_dbg(dev, "exiting interrupt, status %4.4x.\n",
682 inw(ioaddr + EL3_STATUS));
683 return IRQ_RETVAL(handled);
684}
685
686static void media_check(struct timer_list *t)
687{
688 struct el3_private *lp = from_timer(lp, t, media);
689 struct net_device *dev = lp->p_dev->priv;
690 unsigned int ioaddr = dev->base_addr;
691 u16 media, errs;
692 unsigned long flags;
693
694 if (!netif_device_present(dev))
695 goto reschedule;
696
697 /* Check for pending interrupt with expired latency timer: with
698 * this, we can limp along even if the interrupt is blocked
699 */
700 if ((inw(port: ioaddr + EL3_STATUS) & IntLatch) &&
701 (inb(port: ioaddr + EL3_TIMER) == 0xff)) {
702 if (!lp->fast_poll)
703 netdev_warn(dev, format: "interrupt(s) dropped!\n");
704
705 local_irq_save(flags);
706 el3_interrupt(irq: dev->irq, dev_id: dev);
707 local_irq_restore(flags);
708
709 lp->fast_poll = HZ;
710 }
711 if (lp->fast_poll) {
712 lp->fast_poll--;
713 lp->media.expires = jiffies + HZ/100;
714 add_timer(timer: &lp->media);
715 return;
716 }
717
718 /* lp->lock guards the EL3 window. Window should always be 1 except
719 * when the lock is held
720 */
721
722 spin_lock_irqsave(&lp->lock, flags);
723 EL3WINDOW(4);
724 media = inw(port: 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(value: StatsDisable, port: ioaddr + EL3_CMD);
733 errs = inb(port: ioaddr + 0);
734 outw(value: StatsEnable, port: ioaddr + EL3_CMD);
735 dev->stats.tx_carrier_errors += errs;
736 if (errs || (lp->media_status & 0x0010))
737 media |= 0x0010;
738 }
739
740 if (media != lp->media_status) {
741 if ((media & lp->media_status & 0x8000) &&
742 ((lp->media_status ^ media) & 0x0800))
743 netdev_info(dev, format: "%s link beat\n",
744 (lp->media_status & 0x0800 ? "lost" : "found"));
745 else if ((media & lp->media_status & 0x4000) &&
746 ((lp->media_status ^ media) & 0x0010))
747 netdev_info(dev, format: "coax cable %s\n",
748 (lp->media_status & 0x0010 ? "ok" : "problem"));
749 if (dev->if_port == 0) {
750 if (media & 0x8000) {
751 if (media & 0x0800)
752 netdev_info(dev, format: "flipped to 10baseT\n");
753 else
754 tc589_set_xcvr(dev, if_port: 2);
755 } else if (media & 0x4000) {
756 if (media & 0x0010)
757 tc589_set_xcvr(dev, if_port: 1);
758 else
759 netdev_info(dev, format: "flipped to 10base2\n");
760 }
761 }
762 lp->media_status = media;
763 }
764
765 EL3WINDOW(1);
766 spin_unlock_irqrestore(lock: &lp->lock, flags);
767
768reschedule:
769 lp->media.expires = jiffies + HZ;
770 add_timer(timer: &lp->media);
771}
772
773static struct net_device_stats *el3_get_stats(struct net_device *dev)
774{
775 struct el3_private *lp = netdev_priv(dev);
776 unsigned long flags;
777 struct pcmcia_device *link = lp->p_dev;
778
779 if (pcmcia_dev_present(p_dev: link)) {
780 spin_lock_irqsave(&lp->lock, flags);
781 update_stats(dev);
782 spin_unlock_irqrestore(lock: &lp->lock, flags);
783 }
784 return &dev->stats;
785}
786
787/* Update statistics. We change to register window 6, so this should be run
788* single-threaded if the device is active. This is expected to be a rare
789* operation, and it's simpler for the rest of the driver to assume that
790* window 1 is always valid rather than use a special window-state variable.
791*
792* Caller must hold the lock for this
793*/
794
795static void update_stats(struct net_device *dev)
796{
797 unsigned int ioaddr = dev->base_addr;
798
799 netdev_dbg(dev, "updating the statistics.\n");
800 /* Turn off statistics updates while reading. */
801 outw(value: StatsDisable, port: ioaddr + EL3_CMD);
802 /* Switch to the stats window, and read everything. */
803 EL3WINDOW(6);
804 dev->stats.tx_carrier_errors += inb(port: ioaddr + 0);
805 dev->stats.tx_heartbeat_errors += inb(port: ioaddr + 1);
806 /* Multiple collisions. */
807 inb(port: ioaddr + 2);
808 dev->stats.collisions += inb(port: ioaddr + 3);
809 dev->stats.tx_window_errors += inb(port: ioaddr + 4);
810 dev->stats.rx_fifo_errors += inb(port: ioaddr + 5);
811 dev->stats.tx_packets += inb(port: ioaddr + 6);
812 /* Rx packets */
813 inb(port: ioaddr + 7);
814 /* Tx deferrals */
815 inb(port: ioaddr + 8);
816 /* Rx octets */
817 inw(port: ioaddr + 10);
818 /* Tx octets */
819 inw(port: ioaddr + 12);
820
821 /* Back to window 1, and turn statistics back on. */
822 EL3WINDOW(1);
823 outw(value: StatsEnable, port: ioaddr + EL3_CMD);
824}
825
826static int el3_rx(struct net_device *dev)
827{
828 unsigned int ioaddr = dev->base_addr;
829 int worklimit = 32;
830 short rx_status;
831
832 netdev_dbg(dev, "in rx_packet(), status %4.4x, rx_status %4.4x.\n",
833 inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
834 while (!((rx_status = inw(port: ioaddr + RX_STATUS)) & 0x8000) &&
835 worklimit > 0) {
836 worklimit--;
837 if (rx_status & 0x4000) { /* Error, update stats. */
838 short error = rx_status & 0x3800;
839 dev->stats.rx_errors++;
840 switch (error) {
841 case 0x0000:
842 dev->stats.rx_over_errors++;
843 break;
844 case 0x0800:
845 dev->stats.rx_length_errors++;
846 break;
847 case 0x1000:
848 dev->stats.rx_frame_errors++;
849 break;
850 case 0x1800:
851 dev->stats.rx_length_errors++;
852 break;
853 case 0x2000:
854 dev->stats.rx_frame_errors++;
855 break;
856 case 0x2800:
857 dev->stats.rx_crc_errors++;
858 break;
859 }
860 } else {
861 short pkt_len = rx_status & 0x7ff;
862 struct sk_buff *skb;
863
864 skb = netdev_alloc_skb(dev, length: pkt_len + 5);
865
866 netdev_dbg(dev, " Receiving packet size %d status %4.4x.\n",
867 pkt_len, rx_status);
868 if (skb != NULL) {
869 skb_reserve(skb, len: 2);
870 insl(port: ioaddr+RX_FIFO, addr: skb_put(skb, len: pkt_len),
871 count: (pkt_len+3)>>2);
872 skb->protocol = eth_type_trans(skb, dev);
873 netif_rx(skb);
874 dev->stats.rx_packets++;
875 dev->stats.rx_bytes += pkt_len;
876 } else {
877 netdev_dbg(dev, "couldn't allocate a sk_buff of size %d.\n",
878 pkt_len);
879 dev->stats.rx_dropped++;
880 }
881 }
882 /* Pop the top of the Rx FIFO */
883 tc589_wait_for_completion(dev, cmd: RxDiscard);
884 }
885 if (worklimit == 0)
886 netdev_warn(dev, format: "too much work in el3_rx!\n");
887 return 0;
888}
889
890static void set_rx_mode(struct net_device *dev)
891{
892 unsigned int ioaddr = dev->base_addr;
893 u16 opts = SetRxFilter | RxStation | RxBroadcast;
894
895 if (dev->flags & IFF_PROMISC)
896 opts |= RxMulticast | RxProm;
897 else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI))
898 opts |= RxMulticast;
899 outw(value: opts, port: ioaddr + EL3_CMD);
900}
901
902static void set_multicast_list(struct net_device *dev)
903{
904 struct el3_private *priv = netdev_priv(dev);
905 unsigned long flags;
906
907 spin_lock_irqsave(&priv->lock, flags);
908 set_rx_mode(dev);
909 spin_unlock_irqrestore(lock: &priv->lock, flags);
910}
911
912static int el3_close(struct net_device *dev)
913{
914 struct el3_private *lp = netdev_priv(dev);
915 struct pcmcia_device *link = lp->p_dev;
916 unsigned int ioaddr = dev->base_addr;
917
918 dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name);
919
920 if (pcmcia_dev_present(p_dev: link)) {
921 /* Turn off statistics ASAP. We update dev->stats below. */
922 outw(value: StatsDisable, port: ioaddr + EL3_CMD);
923
924 /* Disable the receiver and transmitter. */
925 outw(value: RxDisable, port: ioaddr + EL3_CMD);
926 outw(value: TxDisable, port: ioaddr + EL3_CMD);
927
928 if (dev->if_port == 2)
929 /* Turn off thinnet power. Green! */
930 outw(value: StopCoax, port: ioaddr + EL3_CMD);
931 else if (dev->if_port == 1) {
932 /* Disable link beat and jabber */
933 EL3WINDOW(4);
934 outw(value: 0, port: ioaddr + WN4_MEDIA);
935 }
936
937 /* Switching back to window 0 disables the IRQ. */
938 EL3WINDOW(0);
939 /* But we explicitly zero the IRQ line select anyway. */
940 outw(value: 0x0f00, port: ioaddr + WN0_IRQ);
941
942 /* Check if the card still exists */
943 if ((inw(port: ioaddr+EL3_STATUS) & 0xe000) == 0x2000)
944 update_stats(dev);
945 }
946
947 link->open--;
948 netif_stop_queue(dev);
949 del_timer_sync(timer: &lp->media);
950
951 return 0;
952}
953
954static const struct pcmcia_device_id tc589_ids[] = {
955 PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562),
956 PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77),
957 PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589),
958 PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202),
959 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "cis/3CXEM556.cis"),
960 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "cis/3CXEM556.cis"),
961 PCMCIA_DEVICE_NULL,
962};
963MODULE_DEVICE_TABLE(pcmcia, tc589_ids);
964
965static struct pcmcia_driver tc589_driver = {
966 .owner = THIS_MODULE,
967 .name = "3c589_cs",
968 .probe = tc589_probe,
969 .remove = tc589_detach,
970 .id_table = tc589_ids,
971 .suspend = tc589_suspend,
972 .resume = tc589_resume,
973};
974module_pcmcia_driver(tc589_driver);
975

source code of linux/drivers/net/ethernet/3com/3c589_cs.c