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net: trans_start cleanups
[linux-2.6/x86.git] / drivers / net / pcmcia / 3c589_cs.c
blobd6a459dd4894bc8a9a61a8d2022a5141344a6f6d
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,
73 SelectWindow = 1<<11,
74 StartCoax = 2<<11,
75 RxDisable = 3<<11,
76 RxEnable = 4<<11,
77 RxReset = 5<<11,
78 RxDiscard = 8<<11,
79 TxEnable = 9<<11,
80 TxDisable = 10<<11,
81 TxReset = 11<<11,
82 FakeIntr = 12<<11,
83 AckIntr = 13<<11,
84 SetIntrEnb = 14<<11,
85 SetStatusEnb = 15<<11,
86 SetRxFilter = 16<<11,
87 SetRxThreshold = 17<<11,
88 SetTxThreshold = 18<<11,
89 SetTxStart = 19<<11,
90 StatsEnable = 21<<11,
91 StatsDisable = 22<<11,
92 StopCoax = 23<<11
93 };
94
95 enum c509status {
96 IntLatch = 0x0001,
97 AdapterFailure = 0x0002,
98 TxComplete = 0x0004,
99 TxAvailable = 0x0008,
100 RxComplete = 0x0010,
101 RxEarly = 0x0020,
102 IntReq = 0x0040,
103 StatsFull = 0x0080,
104 CmdBusy = 0x1000
105 };
106
107 /* The SetRxFilter command accepts the following classes: */
108 enum RxFilter {
109 RxStation = 1,
110 RxMulticast = 2,
111 RxBroadcast = 4,
112 RxProm = 8
113 };
114
115 /* Register window 1 offsets, the window used in normal operation. */
116 #define TX_FIFO 0x00
117 #define RX_FIFO 0x00
118 #define RX_STATUS 0x08
119 #define TX_STATUS 0x0B
120 #define TX_FREE 0x0C /* Remaining free bytes in Tx buffer. */
121
122 #define WN0_IRQ 0x08 /* Window 0: Set IRQ line in bits 12-15. */
123 #define WN4_MEDIA 0x0A /* Window 4: Various transcvr/media bits. */
124 #define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */
125 #define MEDIA_LED 0x0001 /* Enable link light on 3C589E cards. */
126
127 /* Time in jiffies before concluding Tx hung */
128 #define TX_TIMEOUT ((400*HZ)/1000)
129
130 struct el3_private {
131 struct pcmcia_device *p_dev;
132 dev_node_t node;
133 /* For transceiver monitoring */
134 struct timer_list media;
135 u16 media_status;
136 u16 fast_poll;
137 unsigned long last_irq;
138 spinlock_t lock;
139 };
140
141 static const char *if_names[] = { "auto", "10baseT", "10base2", "AUI" };
142
143 /*====================================================================*/
144
145 /* Module parameters */
146
147 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
148 MODULE_DESCRIPTION("3Com 3c589 series PCMCIA ethernet driver");
149 MODULE_LICENSE("GPL");
150
151 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
152
153 /* Special hook for setting if_port when module is loaded */
154 INT_MODULE_PARM(if_port, 0);
155
156
157 /*====================================================================*/
158
159 static int tc589_config(struct pcmcia_device *link);
160 static void tc589_release(struct pcmcia_device *link);
161
162 static u16 read_eeprom(unsigned int ioaddr, int index);
163 static void tc589_reset(struct net_device *dev);
164 static void media_check(unsigned long arg);
165 static int el3_config(struct net_device *dev, struct ifmap *map);
166 static int el3_open(struct net_device *dev);
167 static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
168 struct net_device *dev);
169 static irqreturn_t el3_interrupt(int irq, void *dev_id);
170 static void update_stats(struct net_device *dev);
171 static struct net_device_stats *el3_get_stats(struct net_device *dev);
172 static int el3_rx(struct net_device *dev);
173 static int el3_close(struct net_device *dev);
174 static void el3_tx_timeout(struct net_device *dev);
175 static void set_rx_mode(struct net_device *dev);
176 static void set_multicast_list(struct net_device *dev);
177 static const struct ethtool_ops netdev_ethtool_ops;
178
179 static void tc589_detach(struct pcmcia_device *p_dev);
180
181 /*======================================================================
182
183 tc589_attach() creates an "instance" of the driver, allocating
184 local data structures for one device. The device is registered
185 with Card Services.
186
187 ======================================================================*/
188
189 static const struct net_device_ops el3_netdev_ops = {
190 .ndo_open = el3_open,
191 .ndo_stop = el3_close,
192 .ndo_start_xmit = el3_start_xmit,
193 .ndo_tx_timeout = el3_tx_timeout,
194 .ndo_set_config = el3_config,
195 .ndo_get_stats = el3_get_stats,
196 .ndo_set_multicast_list = set_multicast_list,
197 .ndo_change_mtu = eth_change_mtu,
198 .ndo_set_mac_address = eth_mac_addr,
199 .ndo_validate_addr = eth_validate_addr,
200 };
201
202 static int tc589_probe(struct pcmcia_device *link)
203 {
204 struct el3_private *lp;
205 struct net_device *dev;
206
207 dev_dbg(&link->dev, "3c589_attach()\n");
208
209 /* Create new ethernet device */
210 dev = alloc_etherdev(sizeof(struct el3_private));
211 if (!dev)
212 return -ENOMEM;
213 lp = netdev_priv(dev);
214 link->priv = dev;
215 lp->p_dev = link;
216
217 spin_lock_init(&lp->lock);
218 link->io.NumPorts1 = 16;
219 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
220 link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING;
221 link->irq.Handler = &el3_interrupt;
222 link->conf.Attributes = CONF_ENABLE_IRQ;
223 link->conf.IntType = INT_MEMORY_AND_IO;
224 link->conf.ConfigIndex = 1;
225
226 dev->netdev_ops = &el3_netdev_ops;
227 dev->watchdog_timeo = TX_TIMEOUT;
228
229 SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
230
231 return tc589_config(link);
232 } /* tc589_attach */
233
234 /*======================================================================
235
236 This deletes a driver "instance". The device is de-registered
237 with Card Services. If it has been released, all local data
238 structures are freed. Otherwise, the structures will be freed
239 when the device is released.
240
241 ======================================================================*/
242
243 static void tc589_detach(struct pcmcia_device *link)
244 {
245 struct net_device *dev = link->priv;
246
247 dev_dbg(&link->dev, "3c589_detach\n");
248
249 if (link->dev_node)
250 unregister_netdev(dev);
251
252 tc589_release(link);
253
254 free_netdev(dev);
255 } /* tc589_detach */
256
257 /*======================================================================
258
259 tc589_config() is scheduled to run after a CARD_INSERTION event
260 is received, to configure the PCMCIA socket, and to make the
261 ethernet device available to the system.
262
263 ======================================================================*/
264
265 static int tc589_config(struct pcmcia_device *link)
266 {
267 struct net_device *dev = link->priv;
268 struct el3_private *lp = netdev_priv(dev);
269 __be16 *phys_addr;
270 int ret, i, j, multi = 0, fifo;
271 unsigned int ioaddr;
272 char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
273 u8 *buf;
274 size_t len;
275
276 dev_dbg(&link->dev, "3c589_config\n");
277
278 phys_addr = (__be16 *)dev->dev_addr;
279 /* Is this a 3c562? */
280 if (link->manf_id != MANFID_3COM)
281 printk(KERN_INFO "3c589_cs: hmmm, is this really a "
282 "3Com card??\n");
283 multi = (link->card_id == PRODID_3COM_3C562);
284
285 /* For the 3c562, the base address must be xx00-xx7f */
286 link->io.IOAddrLines = 16;
287 for (i = j = 0; j < 0x400; j += 0x10) {
288 if (multi && (j & 0x80)) continue;
289 link->io.BasePort1 = j ^ 0x300;
290 i = pcmcia_request_io(link, &link->io);
291 if (i == 0)
292 break;
293 }
294 if (i != 0)
295 goto failed;
296
297 ret = pcmcia_request_irq(link, &link->irq);
298 if (ret)
299 goto failed;
300
301 ret = pcmcia_request_configuration(link, &link->conf);
302 if (ret)
303 goto failed;
304
305 dev->irq = link->irq.AssignedIRQ;
306 dev->base_addr = link->io.BasePort1;
307 ioaddr = dev->base_addr;
308 EL3WINDOW(0);
309
310 /* The 3c589 has an extra EEPROM for configuration info, including
311 the hardware address. The 3c562 puts the address in the CIS. */
312 len = pcmcia_get_tuple(link, 0x88, &buf);
313 if (buf && len >= 6) {
314 for (i = 0; i < 3; i++)
315 phys_addr[i] = htons(le16_to_cpu(buf[i*2]));
316 kfree(buf);
317 } else {
318 kfree(buf); /* 0 < len < 6 */
319 for (i = 0; i < 3; i++)
320 phys_addr[i] = htons(read_eeprom(ioaddr, i));
321 if (phys_addr[0] == htons(0x6060)) {
322 printk(KERN_ERR "3c589_cs: IO port conflict at 0x%03lx"
323 "-0x%03lx\n", dev->base_addr, dev->base_addr+15);
324 goto failed;
325 }
326 }
327
328 /* The address and resource configuration register aren't loaded from
329 the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version. */
330 outw(0x3f00, ioaddr + 8);
331 fifo = inl(ioaddr);
332
333 /* The if_port symbol can be set when the module is loaded */
334 if ((if_port >= 0) && (if_port <= 3))
335 dev->if_port = if_port;
336 else
337 printk(KERN_ERR "3c589_cs: invalid if_port requested\n");
338
339 link->dev_node = &lp->node;
340 SET_NETDEV_DEV(dev, &link->dev);
341
342 if (register_netdev(dev) != 0) {
343 printk(KERN_ERR "3c589_cs: register_netdev() failed\n");
344 link->dev_node = NULL;
345 goto failed;
346 }
347
348 strcpy(lp->node.dev_name, dev->name);
349
350 netdev_info(dev, "3Com 3c%s, io %#3lx, irq %d, hw_addr %pM\n",
351 (multi ? "562" : "589"), dev->base_addr, dev->irq,
352 dev->dev_addr);
353 netdev_info(dev, " %dK FIFO split %s Rx:Tx, %s xcvr\n",
354 (fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3],
355 if_names[dev->if_port]);
356 return 0;
357
358 failed:
359 tc589_release(link);
360 return -ENODEV;
361 } /* tc589_config */
362
363 /*======================================================================
364
365 After a card is removed, tc589_release() will unregister the net
366 device, and release the PCMCIA configuration. If the device is
367 still open, this will be postponed until it is closed.
368
369 ======================================================================*/
370
371 static void tc589_release(struct pcmcia_device *link)
372 {
373 pcmcia_disable_device(link);
374 }
375
376 static int tc589_suspend(struct pcmcia_device *link)
377 {
378 struct net_device *dev = link->priv;
379
380 if (link->open)
381 netif_device_detach(dev);
382
383 return 0;
384 }
385
386 static int tc589_resume(struct pcmcia_device *link)
387 {
388 struct net_device *dev = link->priv;
389
390 if (link->open) {
391 tc589_reset(dev);
392 netif_device_attach(dev);
393 }
394
395 return 0;
396 }
397
398 /*====================================================================*/
399
400 /*
401 Use this for commands that may take time to finish
402 */
403 static void tc589_wait_for_completion(struct net_device *dev, int cmd)
404 {
405 int i = 100;
406 outw(cmd, dev->base_addr + EL3_CMD);
407 while (--i > 0)
408 if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break;
409 if (i == 0)
410 netdev_warn(dev, "command 0x%04x did not complete!\n", cmd);
411 }
412
413 /*
414 Read a word from the EEPROM using the regular EEPROM access register.
415 Assume that we are in register window zero.
416 */
417 static u16 read_eeprom(unsigned int ioaddr, int index)
418 {
419 int i;
420 outw(EEPROM_READ + index, ioaddr + 10);
421 /* Reading the eeprom takes 162 us */
422 for (i = 1620; i >= 0; i--)
423 if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
424 break;
425 return inw(ioaddr + 12);
426 }
427
428 /*
429 Set transceiver type, perhaps to something other than what the user
430 specified in dev->if_port.
431 */
432 static void tc589_set_xcvr(struct net_device *dev, int if_port)
433 {
434 struct el3_private *lp = netdev_priv(dev);
435 unsigned int ioaddr = dev->base_addr;
436
437 EL3WINDOW(0);
438 switch (if_port) {
439 case 0: case 1: outw(0, ioaddr + 6); break;
440 case 2: outw(3<<14, ioaddr + 6); break;
441 case 3: outw(1<<14, ioaddr + 6); break;
442 }
443 /* On PCMCIA, this just turns on the LED */
444 outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD);
445 /* 10baseT interface, enable link beat and jabber check. */
446 EL3WINDOW(4);
447 outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA);
448 EL3WINDOW(1);
449 if (if_port == 2)
450 lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000);
451 else
452 lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800);
453 }
454
455 static void dump_status(struct net_device *dev)
456 {
457 unsigned int ioaddr = dev->base_addr;
458 EL3WINDOW(1);
459 netdev_info(dev, " irq status %04x, rx status %04x, tx status %02x tx free %04x\n",
460 inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS),
461 inb(ioaddr+TX_STATUS), inw(ioaddr+TX_FREE));
462 EL3WINDOW(4);
463 netdev_info(dev, " diagnostics: fifo %04x net %04x ethernet %04x media %04x\n",
464 inw(ioaddr+0x04), inw(ioaddr+0x06), inw(ioaddr+0x08),
465 inw(ioaddr+0x0a));
466 EL3WINDOW(1);
467 }
468
469 /* Reset and restore all of the 3c589 registers. */
470 static void tc589_reset(struct net_device *dev)
471 {
472 unsigned int ioaddr = dev->base_addr;
473 int i;
474
475 EL3WINDOW(0);
476 outw(0x0001, ioaddr + 4); /* Activate board. */
477 outw(0x3f00, ioaddr + 8); /* Set the IRQ line. */
478
479 /* Set the station address in window 2. */
480 EL3WINDOW(2);
481 for (i = 0; i < 6; i++)
482 outb(dev->dev_addr[i], ioaddr + i);
483
484 tc589_set_xcvr(dev, dev->if_port);
485
486 /* Switch to the stats window, and clear all stats by reading. */
487 outw(StatsDisable, ioaddr + EL3_CMD);
488 EL3WINDOW(6);
489 for (i = 0; i < 9; i++)
490 inb(ioaddr+i);
491 inw(ioaddr + 10);
492 inw(ioaddr + 12);
493
494 /* Switch to register set 1 for normal use. */
495 EL3WINDOW(1);
496
497 set_rx_mode(dev);
498 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
499 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
500 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
501 /* Allow status bits to be seen. */
502 outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
503 /* Ack all pending events, and set active indicator mask. */
504 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
505 ioaddr + EL3_CMD);
506 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
507 | AdapterFailure, ioaddr + EL3_CMD);
508 }
509
510 static void netdev_get_drvinfo(struct net_device *dev,
511 struct ethtool_drvinfo *info)
512 {
513 strcpy(info->driver, DRV_NAME);
514 strcpy(info->version, DRV_VERSION);
515 sprintf(info->bus_info, "PCMCIA 0x%lx", dev->base_addr);
516 }
517
518 static const struct ethtool_ops netdev_ethtool_ops = {
519 .get_drvinfo = netdev_get_drvinfo,
520 };
521
522 static int el3_config(struct net_device *dev, struct ifmap *map)
523 {
524 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
525 if (map->port <= 3) {
526 dev->if_port = map->port;
527 netdev_info(dev, "switched to %s port\n", if_names[dev->if_port]);
528 tc589_set_xcvr(dev, dev->if_port);
529 } else
530 return -EINVAL;
531 }
532 return 0;
533 }
534
535 static int el3_open(struct net_device *dev)
536 {
537 struct el3_private *lp = netdev_priv(dev);
538 struct pcmcia_device *link = lp->p_dev;
539
540 if (!pcmcia_dev_present(link))
541 return -ENODEV;
542
543 link->open++;
544 netif_start_queue(dev);
545
546 tc589_reset(dev);
547 init_timer(&lp->media);
548 lp->media.function = &media_check;
549 lp->media.data = (unsigned long) dev;
550 lp->media.expires = jiffies + HZ;
551 add_timer(&lp->media);
552
553 dev_dbg(&link->dev, "%s: opened, status %4.4x.\n",
554 dev->name, inw(dev->base_addr + EL3_STATUS));
555
556 return 0;
557 }
558
559 static void el3_tx_timeout(struct net_device *dev)
560 {
561 unsigned int ioaddr = dev->base_addr;
562
563 netdev_warn(dev, "Transmit timed out!\n");
564 dump_status(dev);
565 dev->stats.tx_errors++;
566 dev->trans_start = jiffies; /* prevent tx timeout */
567 /* Issue TX_RESET and TX_START commands. */
568 tc589_wait_for_completion(dev, TxReset);
569 outw(TxEnable, ioaddr + EL3_CMD);
570 netif_wake_queue(dev);
571 }
572
573 static void pop_tx_status(struct net_device *dev)
574 {
575 unsigned int ioaddr = dev->base_addr;
576 int i;
577
578 /* Clear the Tx status stack. */
579 for (i = 32; i > 0; i--) {
580 u_char tx_status = inb(ioaddr + TX_STATUS);
581 if (!(tx_status & 0x84)) break;
582 /* reset transmitter on jabber error or underrun */
583 if (tx_status & 0x30)
584 tc589_wait_for_completion(dev, TxReset);
585 if (tx_status & 0x38) {
586 netdev_dbg(dev, "transmit error: status 0x%02x\n", tx_status);
587 outw(TxEnable, ioaddr + EL3_CMD);
588 dev->stats.tx_aborted_errors++;
589 }
590 outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
591 }
592 }
593
594 static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
595 struct net_device *dev)
596 {
597 unsigned int ioaddr = dev->base_addr;
598 struct el3_private *priv = netdev_priv(dev);
599 unsigned long flags;
600
601 netdev_dbg(dev, "el3_start_xmit(length = %ld) called, status %4.4x.\n",
602 (long)skb->len, inw(ioaddr + EL3_STATUS));
603
604 spin_lock_irqsave(&priv->lock, flags);
605
606 dev->stats.tx_bytes += skb->len;
607
608 /* Put out the doubleword header... */
609 outw(skb->len, ioaddr + TX_FIFO);
610 outw(0x00, ioaddr + TX_FIFO);
611 /* ... and the packet rounded to a doubleword. */
612 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
613
614 if (inw(ioaddr + TX_FREE) <= 1536) {
615 netif_stop_queue(dev);
616 /* Interrupt us when the FIFO has room for max-sized packet. */
617 outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
618 }
619
620 pop_tx_status(dev);
621 spin_unlock_irqrestore(&priv->lock, flags);
622 dev_kfree_skb(skb);
623
624 return NETDEV_TX_OK;
625 }
626
627 /* The EL3 interrupt handler. */
628 static irqreturn_t el3_interrupt(int irq, void *dev_id)
629 {
630 struct net_device *dev = (struct net_device *) dev_id;
631 struct el3_private *lp = netdev_priv(dev);
632 unsigned int ioaddr;
633 __u16 status;
634 int i = 0, handled = 1;
635
636 if (!netif_device_present(dev))
637 return IRQ_NONE;
638
639 ioaddr = dev->base_addr;
640
641 netdev_dbg(dev, "interrupt, status %4.4x.\n", inw(ioaddr + EL3_STATUS));
642
643 spin_lock(&lp->lock);
644 while ((status = inw(ioaddr + EL3_STATUS)) &
645 (IntLatch | RxComplete | StatsFull)) {
646 if ((status & 0xe000) != 0x2000) {
647 netdev_dbg(dev, "interrupt from dead card\n");
648 handled = 0;
649 break;
650 }
651 if (status & RxComplete)
652 el3_rx(dev);
653 if (status & TxAvailable) {
654 netdev_dbg(dev, " TX room bit was handled.\n");
655 /* There's room in the FIFO for a full-sized packet. */
656 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
657 netif_wake_queue(dev);
658 }
659 if (status & TxComplete)
660 pop_tx_status(dev);
661 if (status & (AdapterFailure | RxEarly | StatsFull)) {
662 /* Handle all uncommon interrupts. */
663 if (status & StatsFull) /* Empty statistics. */
664 update_stats(dev);
665 if (status & RxEarly) { /* Rx early is unused. */
666 el3_rx(dev);
667 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
668 }
669 if (status & AdapterFailure) {
670 u16 fifo_diag;
671 EL3WINDOW(4);
672 fifo_diag = inw(ioaddr + 4);
673 EL3WINDOW(1);
674 netdev_warn(dev, "adapter failure, FIFO diagnostic register %04x.\n",
675 fifo_diag);
676 if (fifo_diag & 0x0400) {
677 /* Tx overrun */
678 tc589_wait_for_completion(dev, TxReset);
679 outw(TxEnable, ioaddr + EL3_CMD);
680 }
681 if (fifo_diag & 0x2000) {
682 /* Rx underrun */
683 tc589_wait_for_completion(dev, RxReset);
684 set_rx_mode(dev);
685 outw(RxEnable, ioaddr + EL3_CMD);
686 }
687 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
688 }
689 }
690 if (++i > 10) {
691 netdev_err(dev, "infinite loop in interrupt, status %4.4x.\n",
692 status);
693 /* Clear all interrupts */
694 outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
695 break;
696 }
697 /* Acknowledge the IRQ. */
698 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
699 }
700 lp->last_irq = jiffies;
701 spin_unlock(&lp->lock);
702 netdev_dbg(dev, "exiting interrupt, status %4.4x.\n",
703 inw(ioaddr + EL3_STATUS));
704 return IRQ_RETVAL(handled);
705 }
706
707 static void media_check(unsigned long arg)
708 {
709 struct net_device *dev = (struct net_device *)(arg);
710 struct el3_private *lp = netdev_priv(dev);
711 unsigned int ioaddr = dev->base_addr;
712 u16 media, errs;
713 unsigned long flags;
714
715 if (!netif_device_present(dev)) goto reschedule;
716
717 /* Check for pending interrupt with expired latency timer: with
718 this, we can limp along even if the interrupt is blocked */
719 if ((inw(ioaddr + EL3_STATUS) & IntLatch) &&
720 (inb(ioaddr + EL3_TIMER) == 0xff)) {
721 if (!lp->fast_poll)
722 netdev_warn(dev, "interrupt(s) dropped!\n");
723
724 local_irq_save(flags);
725 el3_interrupt(dev->irq, dev);
726 local_irq_restore(flags);
727
728 lp->fast_poll = HZ;
729 }
730 if (lp->fast_poll) {
731 lp->fast_poll--;
732 lp->media.expires = jiffies + HZ/100;
733 add_timer(&lp->media);
734 return;
735 }
736
737 /* lp->lock guards the EL3 window. Window should always be 1 except
738 when the lock is held */
739 spin_lock_irqsave(&lp->lock, flags);
740 EL3WINDOW(4);
741 media = inw(ioaddr+WN4_MEDIA) & 0xc810;
742
743 /* Ignore collisions unless we've had no irq's recently */
744 if (time_before(jiffies, lp->last_irq + HZ)) {
745 media &= ~0x0010;
746 } else {
747 /* Try harder to detect carrier errors */
748 EL3WINDOW(6);
749 outw(StatsDisable, ioaddr + EL3_CMD);
750 errs = inb(ioaddr + 0);
751 outw(StatsEnable, ioaddr + EL3_CMD);
752 dev->stats.tx_carrier_errors += errs;
753 if (errs || (lp->media_status & 0x0010)) media |= 0x0010;
754 }
755
756 if (media != lp->media_status) {
757 if ((media & lp->media_status & 0x8000) &&
758 ((lp->media_status ^ media) & 0x0800))
759 netdev_info(dev, "%s link beat\n",
760 (lp->media_status & 0x0800 ? "lost" : "found"));
761 else if ((media & lp->media_status & 0x4000) &&
762 ((lp->media_status ^ media) & 0x0010))
763 netdev_info(dev, "coax cable %s\n",
764 (lp->media_status & 0x0010 ? "ok" : "problem"));
765 if (dev->if_port == 0) {
766 if (media & 0x8000) {
767 if (media & 0x0800)
768 netdev_info(dev, "flipped to 10baseT\n");
769 else
770 tc589_set_xcvr(dev, 2);
771 } else if (media & 0x4000) {
772 if (media & 0x0010)
773 tc589_set_xcvr(dev, 1);
774 else
775 netdev_info(dev, "flipped to 10base2\n");
776 }
777 }
778 lp->media_status = media;
779 }
780
781 EL3WINDOW(1);
782 spin_unlock_irqrestore(&lp->lock, flags);
783
784 reschedule:
785 lp->media.expires = jiffies + HZ;
786 add_timer(&lp->media);
787 }
788
789 static struct net_device_stats *el3_get_stats(struct net_device *dev)
790 {
791 struct el3_private *lp = netdev_priv(dev);
792 unsigned long flags;
793 struct pcmcia_device *link = lp->p_dev;
794
795 if (pcmcia_dev_present(link)) {
796 spin_lock_irqsave(&lp->lock, flags);
797 update_stats(dev);
798 spin_unlock_irqrestore(&lp->lock, flags);
799 }
800 return &dev->stats;
801 }
802
803 /*
804 Update statistics. We change to register window 6, so this should be run
805 single-threaded if the device is active. This is expected to be a rare
806 operation, and it's simpler for the rest of the driver to assume that
807 window 1 is always valid rather than use a special window-state variable.
808
809 Caller must hold the lock for this
810 */
811 static void update_stats(struct net_device *dev)
812 {
813 unsigned int ioaddr = dev->base_addr;
814
815 netdev_dbg(dev, "updating the statistics.\n");
816 /* Turn off statistics updates while reading. */
817 outw(StatsDisable, ioaddr + EL3_CMD);
818 /* Switch to the stats window, and read everything. */
819 EL3WINDOW(6);
820 dev->stats.tx_carrier_errors += inb(ioaddr + 0);
821 dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
822 /* Multiple collisions. */ inb(ioaddr + 2);
823 dev->stats.collisions += inb(ioaddr + 3);
824 dev->stats.tx_window_errors += inb(ioaddr + 4);
825 dev->stats.rx_fifo_errors += inb(ioaddr + 5);
826 dev->stats.tx_packets += inb(ioaddr + 6);
827 /* Rx packets */ inb(ioaddr + 7);
828 /* Tx deferrals */ inb(ioaddr + 8);
829 /* Rx octets */ inw(ioaddr + 10);
830 /* Tx octets */ inw(ioaddr + 12);
831
832 /* Back to window 1, and turn statistics back on. */
833 EL3WINDOW(1);
834 outw(StatsEnable, ioaddr + EL3_CMD);
835 }
836
837 static int el3_rx(struct net_device *dev)
838 {
839 unsigned int ioaddr = dev->base_addr;
840 int worklimit = 32;
841 short rx_status;
842
843 netdev_dbg(dev, "in rx_packet(), status %4.4x, rx_status %4.4x.\n",
844 inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
845 while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
846 worklimit > 0) {
847 worklimit--;
848 if (rx_status & 0x4000) { /* Error, update stats. */
849 short error = rx_status & 0x3800;
850 dev->stats.rx_errors++;
851 switch (error) {
852 case 0x0000: dev->stats.rx_over_errors++; break;
853 case 0x0800: dev->stats.rx_length_errors++; break;
854 case 0x1000: dev->stats.rx_frame_errors++; break;
855 case 0x1800: dev->stats.rx_length_errors++; break;
856 case 0x2000: dev->stats.rx_frame_errors++; break;
857 case 0x2800: dev->stats.rx_crc_errors++; break;
858 }
859 } else {
860 short pkt_len = rx_status & 0x7ff;
861 struct sk_buff *skb;
862
863 skb = dev_alloc_skb(pkt_len+5);
864
865 netdev_dbg(dev, " Receiving packet size %d status %4.4x.\n",
866 pkt_len, rx_status);
867 if (skb != NULL) {
868 skb_reserve(skb, 2);
869 insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
870 (pkt_len+3)>>2);
871 skb->protocol = eth_type_trans(skb, dev);
872 netif_rx(skb);
873 dev->stats.rx_packets++;
874 dev->stats.rx_bytes += pkt_len;
875 } else {
876 netdev_dbg(dev, "couldn't allocate a sk_buff of size %d.\n",
877 pkt_len);
878 dev->stats.rx_dropped++;
879 }
880 }
881 /* Pop the top of the Rx FIFO */
882 tc589_wait_for_completion(dev, RxDiscard);
883 }
884 if (worklimit == 0)
885 netdev_warn(dev, "too much work in el3_rx!\n");
886 return 0;
887 }
888
889 static void set_rx_mode(struct net_device *dev)
890 {
891 unsigned int ioaddr = dev->base_addr;
892 u16 opts = SetRxFilter | RxStation | RxBroadcast;
893
894 if (dev->flags & IFF_PROMISC)
895 opts |= RxMulticast | RxProm;
896 else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI))
897 opts |= RxMulticast;
898 outw(opts, ioaddr + EL3_CMD);
899 }
900
901 static void set_multicast_list(struct net_device *dev)
902 {
903 struct el3_private *priv = netdev_priv(dev);
904 unsigned long flags;
905
906 spin_lock_irqsave(&priv->lock, flags);
907 set_rx_mode(dev);
908 spin_unlock_irqrestore(&priv->lock, flags);
909 }
910
911 static int el3_close(struct net_device *dev)
912 {
913 struct el3_private *lp = netdev_priv(dev);
914 struct pcmcia_device *link = lp->p_dev;
915 unsigned int ioaddr = dev->base_addr;
916
917 dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name);
918
919 if (pcmcia_dev_present(link)) {
920 /* Turn off statistics ASAP. We update dev->stats below. */
921 outw(StatsDisable, ioaddr + EL3_CMD);
922
923 /* Disable the receiver and transmitter. */
924 outw(RxDisable, ioaddr + EL3_CMD);
925 outw(TxDisable, ioaddr + EL3_CMD);
926
927 if (dev->if_port == 2)
928 /* Turn off thinnet power. Green! */
929 outw(StopCoax, ioaddr + EL3_CMD);
930 else if (dev->if_port == 1) {
931 /* Disable link beat and jabber */
932 EL3WINDOW(4);
933 outw(0, ioaddr + WN4_MEDIA);
934 }
935
936 /* Switching back to window 0 disables the IRQ. */
937 EL3WINDOW(0);
938 /* But we explicitly zero the IRQ line select anyway. */
939 outw(0x0f00, ioaddr + WN0_IRQ);
940
941 /* Check if the card still exists */
942 if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000)
943 update_stats(dev);
944 }
945
946 link->open--;
947 netif_stop_queue(dev);
948 del_timer_sync(&lp->media);
949
950 return 0;
951 }
952
953 static struct pcmcia_device_id tc589_ids[] = {
954 PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562),
955 PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77),
956 PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589),
957 PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202),
958 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "cis/3CXEM556.cis"),
959 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "cis/3CXEM556.cis"),
960 PCMCIA_DEVICE_NULL,
961 };
962 MODULE_DEVICE_TABLE(pcmcia, tc589_ids);
963
964 static struct pcmcia_driver tc589_driver = {
965 .owner = THIS_MODULE,
966 .drv = {
967 .name = "3c589_cs",
968 },
969 .probe = tc589_probe,
970 .remove = tc589_detach,
971 .id_table = tc589_ids,
972 .suspend = tc589_suspend,
973 .resume = tc589_resume,
974 };
975
976 static int __init init_tc589(void)
977 {
978 return pcmcia_register_driver(&tc589_driver);
979 }
980
981 static void __exit exit_tc589(void)
982 {
983 pcmcia_unregister_driver(&tc589_driver);
984 }
985
986 module_init(init_tc589);
987 module_exit(exit_tc589);
x86 "subsystem" repository