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Save sram context after changing MPU, DSP or core clocks
[linux-ginger.git] / drivers / net / pcmcia / 3c589_cs.c
blob569fb06793cf7da4da614a597113e7eadeeed022
1 /*======================================================================
2
3 A PCMCIA ethernet driver for the 3com 3c589 card.
4
5 Copyright (C) 1999 David A. Hinds -- dahinds@users.sourceforge.net
6
7 3c589_cs.c 1.162 2001/10/13 00:08:50
8
9 The network driver code is based on Donald Becker's 3c589 code:
10
11 Written 1994 by Donald Becker.
12 Copyright 1993 United States Government as represented by the
13 Director, National Security Agency. This software may be used and
14 distributed according to the terms of the GNU General Public License,
15 incorporated herein by reference.
16 Donald Becker may be reached at becker@scyld.com
17
18 Updated for 2.5.x by Alan Cox <alan@lxorguk.ukuu.org.uk>
19
20 ======================================================================*/
21
22 #define DRV_NAME "3c589_cs"
23 #define DRV_VERSION "1.162-ac"
24
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/kernel.h>
28 #include <linux/ptrace.h>
29 #include <linux/slab.h>
30 #include <linux/string.h>
31 #include <linux/timer.h>
32 #include <linux/interrupt.h>
33 #include <linux/in.h>
34 #include <linux/delay.h>
35 #include <linux/ethtool.h>
36 #include <linux/netdevice.h>
37 #include <linux/etherdevice.h>
38 #include <linux/skbuff.h>
39 #include <linux/if_arp.h>
40 #include <linux/ioport.h>
41 #include <linux/bitops.h>
42 #include <linux/jiffies.h>
43
44 #include <pcmcia/cs_types.h>
45 #include <pcmcia/cs.h>
46 #include <pcmcia/cistpl.h>
47 #include <pcmcia/cisreg.h>
48 #include <pcmcia/ciscode.h>
49 #include <pcmcia/ds.h>
50
51 #include <asm/uaccess.h>
52 #include <asm/io.h>
53 #include <asm/system.h>
54
55 /* To minimize the size of the driver source I only define operating
56 constants if they are used several times. You'll need the manual
57 if you want to understand driver details. */
58 /* Offsets from base I/O address. */
59 #define EL3_DATA 0x00
60 #define EL3_TIMER 0x0a
61 #define EL3_CMD 0x0e
62 #define EL3_STATUS 0x0e
63
64 #define EEPROM_READ 0x0080
65 #define EEPROM_BUSY 0x8000
66
67 #define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
68
69 /* The top five bits written to EL3_CMD are a command, the lower
70 11 bits are the parameter, if applicable. */
71 enum c509cmd {
72 TotalReset = 0<<11, SelectWindow = 1<<11, StartCoax = 2<<11,
73 RxDisable = 3<<11, RxEnable = 4<<11, RxReset = 5<<11, RxDiscard = 8<<11,
74 TxEnable = 9<<11, TxDisable = 10<<11, TxReset = 11<<11,
75 FakeIntr = 12<<11, AckIntr = 13<<11, SetIntrEnb = 14<<11,
76 SetStatusEnb = 15<<11, SetRxFilter = 16<<11, SetRxThreshold = 17<<11,
77 SetTxThreshold = 18<<11, SetTxStart = 19<<11, StatsEnable = 21<<11,
78 StatsDisable = 22<<11, StopCoax = 23<<11,
79 };
80
81 enum c509status {
82 IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004,
83 TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
84 IntReq = 0x0040, StatsFull = 0x0080, CmdBusy = 0x1000
85 };
86
87 /* The SetRxFilter command accepts the following classes: */
88 enum RxFilter {
89 RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8
90 };
91
92 /* Register window 1 offsets, the window used in normal operation. */
93 #define TX_FIFO 0x00
94 #define RX_FIFO 0x00
95 #define RX_STATUS 0x08
96 #define TX_STATUS 0x0B
97 #define TX_FREE 0x0C /* Remaining free bytes in Tx buffer. */
98
99 #define WN0_IRQ 0x08 /* Window 0: Set IRQ line in bits 12-15. */
100 #define WN4_MEDIA 0x0A /* Window 4: Various transcvr/media bits. */
101 #define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */
102 #define MEDIA_LED 0x0001 /* Enable link light on 3C589E cards. */
103
104 /* Time in jiffies before concluding Tx hung */
105 #define TX_TIMEOUT ((400*HZ)/1000)
106
107 struct el3_private {
108 struct pcmcia_device *p_dev;
109 dev_node_t node;
110 /* For transceiver monitoring */
111 struct timer_list media;
112 u16 media_status;
113 u16 fast_poll;
114 unsigned long last_irq;
115 spinlock_t lock;
116 };
117
118 static const char *if_names[] = { "auto", "10baseT", "10base2", "AUI" };
119
120 /*====================================================================*/
121
122 /* Module parameters */
123
124 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
125 MODULE_DESCRIPTION("3Com 3c589 series PCMCIA ethernet driver");
126 MODULE_LICENSE("GPL");
127
128 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
129
130 /* Special hook for setting if_port when module is loaded */
131 INT_MODULE_PARM(if_port, 0);
132
133 #ifdef PCMCIA_DEBUG
134 INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG);
135 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
136 static char *version =
137 DRV_NAME ".c " DRV_VERSION " 2001/10/13 00:08:50 (David Hinds)";
138 #else
139 #define DEBUG(n, args...)
140 #endif
141
142 /*====================================================================*/
143
144 static int tc589_config(struct pcmcia_device *link);
145 static void tc589_release(struct pcmcia_device *link);
146
147 static u16 read_eeprom(unsigned int ioaddr, int index);
148 static void tc589_reset(struct net_device *dev);
149 static void media_check(unsigned long arg);
150 static int el3_config(struct net_device *dev, struct ifmap *map);
151 static int el3_open(struct net_device *dev);
152 static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
153 struct net_device *dev);
154 static irqreturn_t el3_interrupt(int irq, void *dev_id);
155 static void update_stats(struct net_device *dev);
156 static struct net_device_stats *el3_get_stats(struct net_device *dev);
157 static int el3_rx(struct net_device *dev);
158 static int el3_close(struct net_device *dev);
159 static void el3_tx_timeout(struct net_device *dev);
160 static void set_rx_mode(struct net_device *dev);
161 static void set_multicast_list(struct net_device *dev);
162 static const struct ethtool_ops netdev_ethtool_ops;
163
164 static void tc589_detach(struct pcmcia_device *p_dev);
165
166 /*======================================================================
167
168 tc589_attach() creates an "instance" of the driver, allocating
169 local data structures for one device. The device is registered
170 with Card Services.
171
172 ======================================================================*/
173
174 static const struct net_device_ops el3_netdev_ops = {
175 .ndo_open = el3_open,
176 .ndo_stop = el3_close,
177 .ndo_start_xmit = el3_start_xmit,
178 .ndo_tx_timeout = el3_tx_timeout,
179 .ndo_set_config = el3_config,
180 .ndo_get_stats = el3_get_stats,
181 .ndo_set_multicast_list = set_multicast_list,
182 .ndo_change_mtu = eth_change_mtu,
183 .ndo_set_mac_address = eth_mac_addr,
184 .ndo_validate_addr = eth_validate_addr,
185 };
186
187 static int tc589_probe(struct pcmcia_device *link)
188 {
189 struct el3_private *lp;
190 struct net_device *dev;
191
192 DEBUG(0, "3c589_attach()\n");
193
194 /* Create new ethernet device */
195 dev = alloc_etherdev(sizeof(struct el3_private));
196 if (!dev)
197 return -ENOMEM;
198 lp = netdev_priv(dev);
199 link->priv = dev;
200 lp->p_dev = link;
201
202 spin_lock_init(&lp->lock);
203 link->io.NumPorts1 = 16;
204 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
205 link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_HANDLE_PRESENT;
206 link->irq.IRQInfo1 = IRQ_LEVEL_ID;
207 link->irq.Handler = &el3_interrupt;
208 link->irq.Instance = dev;
209 link->conf.Attributes = CONF_ENABLE_IRQ;
210 link->conf.IntType = INT_MEMORY_AND_IO;
211 link->conf.ConfigIndex = 1;
212
213 dev->netdev_ops = &el3_netdev_ops;
214 dev->watchdog_timeo = TX_TIMEOUT;
215
216 SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
217
218 return tc589_config(link);
219 } /* tc589_attach */
220
221 /*======================================================================
222
223 This deletes a driver "instance". The device is de-registered
224 with Card Services. If it has been released, all local data
225 structures are freed. Otherwise, the structures will be freed
226 when the device is released.
227
228 ======================================================================*/
229
230 static void tc589_detach(struct pcmcia_device *link)
231 {
232 struct net_device *dev = link->priv;
233
234 DEBUG(0, "3c589_detach(0x%p)\n", link);
235
236 if (link->dev_node)
237 unregister_netdev(dev);
238
239 tc589_release(link);
240
241 free_netdev(dev);
242 } /* tc589_detach */
243
244 /*======================================================================
245
246 tc589_config() is scheduled to run after a CARD_INSERTION event
247 is received, to configure the PCMCIA socket, and to make the
248 ethernet device available to the system.
249
250 ======================================================================*/
251
252 #define CS_CHECK(fn, ret) \
253 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
254
255 static int tc589_config(struct pcmcia_device *link)
256 {
257 struct net_device *dev = link->priv;
258 struct el3_private *lp = netdev_priv(dev);
259 tuple_t tuple;
260 __le16 buf[32];
261 __be16 *phys_addr;
262 int last_fn, last_ret, i, j, multi = 0, fifo;
263 unsigned int ioaddr;
264 char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
265
266 DEBUG(0, "3c589_config(0x%p)\n", link);
267
268 phys_addr = (__be16 *)dev->dev_addr;
269 tuple.Attributes = 0;
270 tuple.TupleData = (cisdata_t *)buf;
271 tuple.TupleDataMax = sizeof(buf);
272 tuple.TupleOffset = 0;
273 tuple.Attributes = TUPLE_RETURN_COMMON;
274
275 /* Is this a 3c562? */
276 if (link->manf_id != MANFID_3COM)
277 printk(KERN_INFO "3c589_cs: hmmm, is this really a "
278 "3Com card??\n");
279 multi = (link->card_id == PRODID_3COM_3C562);
280
281 /* For the 3c562, the base address must be xx00-xx7f */
282 link->io.IOAddrLines = 16;
283 for (i = j = 0; j < 0x400; j += 0x10) {
284 if (multi && (j & 0x80)) continue;
285 link->io.BasePort1 = j ^ 0x300;
286 i = pcmcia_request_io(link, &link->io);
287 if (i == 0)
288 break;
289 }
290 if (i != 0) {
291 cs_error(link, RequestIO, i);
292 goto failed;
293 }
294 CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
295 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
296
297 dev->irq = link->irq.AssignedIRQ;
298 dev->base_addr = link->io.BasePort1;
299 ioaddr = dev->base_addr;
300 EL3WINDOW(0);
301
302 /* The 3c589 has an extra EEPROM for configuration info, including
303 the hardware address. The 3c562 puts the address in the CIS. */
304 tuple.DesiredTuple = 0x88;
305 if (pcmcia_get_first_tuple(link, &tuple) == 0) {
306 pcmcia_get_tuple_data(link, &tuple);
307 for (i = 0; i < 3; i++)
308 phys_addr[i] = htons(le16_to_cpu(buf[i]));
309 } else {
310 for (i = 0; i < 3; i++)
311 phys_addr[i] = htons(read_eeprom(ioaddr, i));
312 if (phys_addr[0] == htons(0x6060)) {
313 printk(KERN_ERR "3c589_cs: IO port conflict at 0x%03lx"
314 "-0x%03lx\n", dev->base_addr, dev->base_addr+15);
315 goto failed;
316 }
317 }
318
319 /* The address and resource configuration register aren't loaded from
320 the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version. */
321 outw(0x3f00, ioaddr + 8);
322 fifo = inl(ioaddr);
323
324 /* The if_port symbol can be set when the module is loaded */
325 if ((if_port >= 0) && (if_port <= 3))
326 dev->if_port = if_port;
327 else
328 printk(KERN_ERR "3c589_cs: invalid if_port requested\n");
329
330 link->dev_node = &lp->node;
331 SET_NETDEV_DEV(dev, &handle_to_dev(link));
332
333 if (register_netdev(dev) != 0) {
334 printk(KERN_ERR "3c589_cs: register_netdev() failed\n");
335 link->dev_node = NULL;
336 goto failed;
337 }
338
339 strcpy(lp->node.dev_name, dev->name);
340
341 printk(KERN_INFO "%s: 3Com 3c%s, io %#3lx, irq %d, "
342 "hw_addr %pM\n",
343 dev->name, (multi ? "562" : "589"), dev->base_addr, dev->irq,
344 dev->dev_addr);
345 printk(KERN_INFO " %dK FIFO split %s Rx:Tx, %s xcvr\n",
346 (fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3],
347 if_names[dev->if_port]);
348 return 0;
349
350 cs_failed:
351 cs_error(link, last_fn, last_ret);
352 failed:
353 tc589_release(link);
354 return -ENODEV;
355 } /* tc589_config */
356
357 /*======================================================================
358
359 After a card is removed, tc589_release() will unregister the net
360 device, and release the PCMCIA configuration. If the device is
361 still open, this will be postponed until it is closed.
362
363 ======================================================================*/
364
365 static void tc589_release(struct pcmcia_device *link)
366 {
367 pcmcia_disable_device(link);
368 }
369
370 static int tc589_suspend(struct pcmcia_device *link)
371 {
372 struct net_device *dev = link->priv;
373
374 if (link->open)
375 netif_device_detach(dev);
376
377 return 0;
378 }
379
380 static int tc589_resume(struct pcmcia_device *link)
381 {
382 struct net_device *dev = link->priv;
383
384 if (link->open) {
385 tc589_reset(dev);
386 netif_device_attach(dev);
387 }
388
389 return 0;
390 }
391
392 /*====================================================================*/
393
394 /*
395 Use this for commands that may take time to finish
396 */
397 static void tc589_wait_for_completion(struct net_device *dev, int cmd)
398 {
399 int i = 100;
400 outw(cmd, dev->base_addr + EL3_CMD);
401 while (--i > 0)
402 if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break;
403 if (i == 0)
404 printk(KERN_WARNING "%s: command 0x%04x did not complete!\n",
405 dev->name, cmd);
406 }
407
408 /*
409 Read a word from the EEPROM using the regular EEPROM access register.
410 Assume that we are in register window zero.
411 */
412 static u16 read_eeprom(unsigned int ioaddr, int index)
413 {
414 int i;
415 outw(EEPROM_READ + index, ioaddr + 10);
416 /* Reading the eeprom takes 162 us */
417 for (i = 1620; i >= 0; i--)
418 if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
419 break;
420 return inw(ioaddr + 12);
421 }
422
423 /*
424 Set transceiver type, perhaps to something other than what the user
425 specified in dev->if_port.
426 */
427 static void tc589_set_xcvr(struct net_device *dev, int if_port)
428 {
429 struct el3_private *lp = netdev_priv(dev);
430 unsigned int ioaddr = dev->base_addr;
431
432 EL3WINDOW(0);
433 switch (if_port) {
434 case 0: case 1: outw(0, ioaddr + 6); break;
435 case 2: outw(3<<14, ioaddr + 6); break;
436 case 3: outw(1<<14, ioaddr + 6); break;
437 }
438 /* On PCMCIA, this just turns on the LED */
439 outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD);
440 /* 10baseT interface, enable link beat and jabber check. */
441 EL3WINDOW(4);
442 outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA);
443 EL3WINDOW(1);
444 if (if_port == 2)
445 lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000);
446 else
447 lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800);
448 }
449
450 static void dump_status(struct net_device *dev)
451 {
452 unsigned int ioaddr = dev->base_addr;
453 EL3WINDOW(1);
454 printk(KERN_INFO " irq status %04x, rx status %04x, tx status "
455 "%02x tx free %04x\n", inw(ioaddr+EL3_STATUS),
456 inw(ioaddr+RX_STATUS), inb(ioaddr+TX_STATUS),
457 inw(ioaddr+TX_FREE));
458 EL3WINDOW(4);
459 printk(KERN_INFO " diagnostics: fifo %04x net %04x ethernet %04x"
460 " media %04x\n", inw(ioaddr+0x04), inw(ioaddr+0x06),
461 inw(ioaddr+0x08), inw(ioaddr+0x0a));
462 EL3WINDOW(1);
463 }
464
465 /* Reset and restore all of the 3c589 registers. */
466 static void tc589_reset(struct net_device *dev)
467 {
468 unsigned int ioaddr = dev->base_addr;
469 int i;
470
471 EL3WINDOW(0);
472 outw(0x0001, ioaddr + 4); /* Activate board. */
473 outw(0x3f00, ioaddr + 8); /* Set the IRQ line. */
474
475 /* Set the station address in window 2. */
476 EL3WINDOW(2);
477 for (i = 0; i < 6; i++)
478 outb(dev->dev_addr[i], ioaddr + i);
479
480 tc589_set_xcvr(dev, dev->if_port);
481
482 /* Switch to the stats window, and clear all stats by reading. */
483 outw(StatsDisable, ioaddr + EL3_CMD);
484 EL3WINDOW(6);
485 for (i = 0; i < 9; i++)
486 inb(ioaddr+i);
487 inw(ioaddr + 10);
488 inw(ioaddr + 12);
489
490 /* Switch to register set 1 for normal use. */
491 EL3WINDOW(1);
492
493 set_rx_mode(dev);
494 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
495 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
496 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
497 /* Allow status bits to be seen. */
498 outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
499 /* Ack all pending events, and set active indicator mask. */
500 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
501 ioaddr + EL3_CMD);
502 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
503 | AdapterFailure, ioaddr + EL3_CMD);
504 }
505
506 static void netdev_get_drvinfo(struct net_device *dev,
507 struct ethtool_drvinfo *info)
508 {
509 strcpy(info->driver, DRV_NAME);
510 strcpy(info->version, DRV_VERSION);
511 sprintf(info->bus_info, "PCMCIA 0x%lx", dev->base_addr);
512 }
513
514 #ifdef PCMCIA_DEBUG
515 static u32 netdev_get_msglevel(struct net_device *dev)
516 {
517 return pc_debug;
518 }
519
520 static void netdev_set_msglevel(struct net_device *dev, u32 level)
521 {
522 pc_debug = level;
523 }
524 #endif /* PCMCIA_DEBUG */
525
526 static const struct ethtool_ops netdev_ethtool_ops = {
527 .get_drvinfo = netdev_get_drvinfo,
528 #ifdef PCMCIA_DEBUG
529 .get_msglevel = netdev_get_msglevel,
530 .set_msglevel = netdev_set_msglevel,
531 #endif /* PCMCIA_DEBUG */
532 };
533
534 static int el3_config(struct net_device *dev, struct ifmap *map)
535 {
536 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
537 if (map->port <= 3) {
538 dev->if_port = map->port;
539 printk(KERN_INFO "%s: switched to %s port\n",
540 dev->name, if_names[dev->if_port]);
541 tc589_set_xcvr(dev, dev->if_port);
542 } else
543 return -EINVAL;
544 }
545 return 0;
546 }
547
548 static int el3_open(struct net_device *dev)
549 {
550 struct el3_private *lp = netdev_priv(dev);
551 struct pcmcia_device *link = lp->p_dev;
552
553 if (!pcmcia_dev_present(link))
554 return -ENODEV;
555
556 link->open++;
557 netif_start_queue(dev);
558
559 tc589_reset(dev);
560 init_timer(&lp->media);
561 lp->media.function = &media_check;
562 lp->media.data = (unsigned long) dev;
563 lp->media.expires = jiffies + HZ;
564 add_timer(&lp->media);
565
566 DEBUG(1, "%s: opened, status %4.4x.\n",
567 dev->name, inw(dev->base_addr + EL3_STATUS));
568
569 return 0;
570 }
571
572 static void el3_tx_timeout(struct net_device *dev)
573 {
574 unsigned int ioaddr = dev->base_addr;
575
576 printk(KERN_WARNING "%s: Transmit timed out!\n", dev->name);
577 dump_status(dev);
578 dev->stats.tx_errors++;
579 dev->trans_start = jiffies;
580 /* Issue TX_RESET and TX_START commands. */
581 tc589_wait_for_completion(dev, TxReset);
582 outw(TxEnable, ioaddr + EL3_CMD);
583 netif_wake_queue(dev);
584 }
585
586 static void pop_tx_status(struct net_device *dev)
587 {
588 unsigned int ioaddr = dev->base_addr;
589 int i;
590
591 /* Clear the Tx status stack. */
592 for (i = 32; i > 0; i--) {
593 u_char tx_status = inb(ioaddr + TX_STATUS);
594 if (!(tx_status & 0x84)) break;
595 /* reset transmitter on jabber error or underrun */
596 if (tx_status & 0x30)
597 tc589_wait_for_completion(dev, TxReset);
598 if (tx_status & 0x38) {
599 DEBUG(1, "%s: transmit error: status 0x%02x\n",
600 dev->name, tx_status);
601 outw(TxEnable, ioaddr + EL3_CMD);
602 dev->stats.tx_aborted_errors++;
603 }
604 outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
605 }
606 }
607
608 static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
609 struct net_device *dev)
610 {
611 unsigned int ioaddr = dev->base_addr;
612 struct el3_private *priv = netdev_priv(dev);
613 unsigned long flags;
614
615 DEBUG(3, "%s: el3_start_xmit(length = %ld) called, "
616 "status %4.4x.\n", dev->name, (long)skb->len,
617 inw(ioaddr + EL3_STATUS));
618
619 spin_lock_irqsave(&priv->lock, flags);
620
621 dev->stats.tx_bytes += skb->len;
622
623 /* Put out the doubleword header... */
624 outw(skb->len, ioaddr + TX_FIFO);
625 outw(0x00, ioaddr + TX_FIFO);
626 /* ... and the packet rounded to a doubleword. */
627 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
628
629 dev->trans_start = jiffies;
630 if (inw(ioaddr + TX_FREE) <= 1536) {
631 netif_stop_queue(dev);
632 /* Interrupt us when the FIFO has room for max-sized packet. */
633 outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
634 }
635
636 pop_tx_status(dev);
637 spin_unlock_irqrestore(&priv->lock, flags);
638 dev_kfree_skb(skb);
639
640 return NETDEV_TX_OK;
641 }
642
643 /* The EL3 interrupt handler. */
644 static irqreturn_t el3_interrupt(int irq, void *dev_id)
645 {
646 struct net_device *dev = (struct net_device *) dev_id;
647 struct el3_private *lp = netdev_priv(dev);
648 unsigned int ioaddr;
649 __u16 status;
650 int i = 0, handled = 1;
651
652 if (!netif_device_present(dev))
653 return IRQ_NONE;
654
655 ioaddr = dev->base_addr;
656
657 DEBUG(3, "%s: interrupt, status %4.4x.\n",
658 dev->name, inw(ioaddr + EL3_STATUS));
659
660 spin_lock(&lp->lock);
661 while ((status = inw(ioaddr + EL3_STATUS)) &
662 (IntLatch | RxComplete | StatsFull)) {
663 if ((status & 0xe000) != 0x2000) {
664 DEBUG(1, "%s: interrupt from dead card\n", dev->name);
665 handled = 0;
666 break;
667 }
668
669 if (status & RxComplete)
670 el3_rx(dev);
671
672 if (status & TxAvailable) {
673 DEBUG(3, " TX room bit was handled.\n");
674 /* There's room in the FIFO for a full-sized packet. */
675 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
676 netif_wake_queue(dev);
677 }
678
679 if (status & TxComplete)
680 pop_tx_status(dev);
681
682 if (status & (AdapterFailure | RxEarly | StatsFull)) {
683 /* Handle all uncommon interrupts. */
684 if (status & StatsFull) /* Empty statistics. */
685 update_stats(dev);
686 if (status & RxEarly) { /* Rx early is unused. */
687 el3_rx(dev);
688 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
689 }
690 if (status & AdapterFailure) {
691 u16 fifo_diag;
692 EL3WINDOW(4);
693 fifo_diag = inw(ioaddr + 4);
694 EL3WINDOW(1);
695 printk(KERN_WARNING "%s: adapter failure, FIFO diagnostic"
696 " register %04x.\n", dev->name, fifo_diag);
697 if (fifo_diag & 0x0400) {
698 /* Tx overrun */
699 tc589_wait_for_completion(dev, TxReset);
700 outw(TxEnable, ioaddr + EL3_CMD);
701 }
702 if (fifo_diag & 0x2000) {
703 /* Rx underrun */
704 tc589_wait_for_completion(dev, RxReset);
705 set_rx_mode(dev);
706 outw(RxEnable, ioaddr + EL3_CMD);
707 }
708 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
709 }
710 }
711
712 if (++i > 10) {
713 printk(KERN_ERR "%s: infinite loop in interrupt, "
714 "status %4.4x.\n", dev->name, status);
715 /* Clear all interrupts */
716 outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
717 break;
718 }
719 /* Acknowledge the IRQ. */
720 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
721 }
722
723 lp->last_irq = jiffies;
724 spin_unlock(&lp->lock);
725 DEBUG(3, "%s: exiting interrupt, status %4.4x.\n",
726 dev->name, inw(ioaddr + EL3_STATUS));
727 return IRQ_RETVAL(handled);
728 }
729
730 static void media_check(unsigned long arg)
731 {
732 struct net_device *dev = (struct net_device *)(arg);
733 struct el3_private *lp = netdev_priv(dev);
734 unsigned int ioaddr = dev->base_addr;
735 u16 media, errs;
736 unsigned long flags;
737
738 if (!netif_device_present(dev)) goto reschedule;
739
740 /* Check for pending interrupt with expired latency timer: with
741 this, we can limp along even if the interrupt is blocked */
742 if ((inw(ioaddr + EL3_STATUS) & IntLatch) &&
743 (inb(ioaddr + EL3_TIMER) == 0xff)) {
744 if (!lp->fast_poll)
745 printk(KERN_WARNING "%s: interrupt(s) dropped!\n", dev->name);
746 el3_interrupt(dev->irq, dev);
747 lp->fast_poll = HZ;
748 }
749 if (lp->fast_poll) {
750 lp->fast_poll--;
751 lp->media.expires = jiffies + HZ/100;
752 add_timer(&lp->media);
753 return;
754 }
755
756 /* lp->lock guards the EL3 window. Window should always be 1 except
757 when the lock is held */
758 spin_lock_irqsave(&lp->lock, flags);
759 EL3WINDOW(4);
760 media = inw(ioaddr+WN4_MEDIA) & 0xc810;
761
762 /* Ignore collisions unless we've had no irq's recently */
763 if (time_before(jiffies, lp->last_irq + HZ)) {
764 media &= ~0x0010;
765 } else {
766 /* Try harder to detect carrier errors */
767 EL3WINDOW(6);
768 outw(StatsDisable, ioaddr + EL3_CMD);
769 errs = inb(ioaddr + 0);
770 outw(StatsEnable, ioaddr + EL3_CMD);
771 dev->stats.tx_carrier_errors += errs;
772 if (errs || (lp->media_status & 0x0010)) media |= 0x0010;
773 }
774
775 if (media != lp->media_status) {
776 if ((media & lp->media_status & 0x8000) &&
777 ((lp->media_status ^ media) & 0x0800))
778 printk(KERN_INFO "%s: %s link beat\n", dev->name,
779 (lp->media_status & 0x0800 ? "lost" : "found"));
780 else if ((media & lp->media_status & 0x4000) &&
781 ((lp->media_status ^ media) & 0x0010))
782 printk(KERN_INFO "%s: coax cable %s\n", dev->name,
783 (lp->media_status & 0x0010 ? "ok" : "problem"));
784 if (dev->if_port == 0) {
785 if (media & 0x8000) {
786 if (media & 0x0800)
787 printk(KERN_INFO "%s: flipped to 10baseT\n",
788 dev->name);
789 else
790 tc589_set_xcvr(dev, 2);
791 } else if (media & 0x4000) {
792 if (media & 0x0010)
793 tc589_set_xcvr(dev, 1);
794 else
795 printk(KERN_INFO "%s: flipped to 10base2\n",
796 dev->name);
797 }
798 }
799 lp->media_status = media;
800 }
801
802 EL3WINDOW(1);
803 spin_unlock_irqrestore(&lp->lock, flags);
804
805 reschedule:
806 lp->media.expires = jiffies + HZ;
807 add_timer(&lp->media);
808 }
809
810 static struct net_device_stats *el3_get_stats(struct net_device *dev)
811 {
812 struct el3_private *lp = netdev_priv(dev);
813 unsigned long flags;
814 struct pcmcia_device *link = lp->p_dev;
815
816 if (pcmcia_dev_present(link)) {
817 spin_lock_irqsave(&lp->lock, flags);
818 update_stats(dev);
819 spin_unlock_irqrestore(&lp->lock, flags);
820 }
821 return &dev->stats;
822 }
823
824 /*
825 Update statistics. We change to register window 6, so this should be run
826 single-threaded if the device is active. This is expected to be a rare
827 operation, and it's simpler for the rest of the driver to assume that
828 window 1 is always valid rather than use a special window-state variable.
829
830 Caller must hold the lock for this
831 */
832 static void update_stats(struct net_device *dev)
833 {
834 unsigned int ioaddr = dev->base_addr;
835
836 DEBUG(2, "%s: updating the statistics.\n", dev->name);
837 /* Turn off statistics updates while reading. */
838 outw(StatsDisable, ioaddr + EL3_CMD);
839 /* Switch to the stats window, and read everything. */
840 EL3WINDOW(6);
841 dev->stats.tx_carrier_errors += inb(ioaddr + 0);
842 dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
843 /* Multiple collisions. */ inb(ioaddr + 2);
844 dev->stats.collisions += inb(ioaddr + 3);
845 dev->stats.tx_window_errors += inb(ioaddr + 4);
846 dev->stats.rx_fifo_errors += inb(ioaddr + 5);
847 dev->stats.tx_packets += inb(ioaddr + 6);
848 /* Rx packets */ inb(ioaddr + 7);
849 /* Tx deferrals */ inb(ioaddr + 8);
850 /* Rx octets */ inw(ioaddr + 10);
851 /* Tx octets */ inw(ioaddr + 12);
852
853 /* Back to window 1, and turn statistics back on. */
854 EL3WINDOW(1);
855 outw(StatsEnable, ioaddr + EL3_CMD);
856 }
857
858 static int el3_rx(struct net_device *dev)
859 {
860 unsigned int ioaddr = dev->base_addr;
861 int worklimit = 32;
862 short rx_status;
863
864 DEBUG(3, "%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n",
865 dev->name, inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
866 while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
867 worklimit > 0) {
868 worklimit--;
869 if (rx_status & 0x4000) { /* Error, update stats. */
870 short error = rx_status & 0x3800;
871 dev->stats.rx_errors++;
872 switch (error) {
873 case 0x0000: dev->stats.rx_over_errors++; break;
874 case 0x0800: dev->stats.rx_length_errors++; break;
875 case 0x1000: dev->stats.rx_frame_errors++; break;
876 case 0x1800: dev->stats.rx_length_errors++; break;
877 case 0x2000: dev->stats.rx_frame_errors++; break;
878 case 0x2800: dev->stats.rx_crc_errors++; break;
879 }
880 } else {
881 short pkt_len = rx_status & 0x7ff;
882 struct sk_buff *skb;
883
884 skb = dev_alloc_skb(pkt_len+5);
885
886 DEBUG(3, " Receiving packet size %d status %4.4x.\n",
887 pkt_len, rx_status);
888 if (skb != NULL) {
889 skb_reserve(skb, 2);
890 insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
891 (pkt_len+3)>>2);
892 skb->protocol = eth_type_trans(skb, dev);
893 netif_rx(skb);
894 dev->stats.rx_packets++;
895 dev->stats.rx_bytes += pkt_len;
896 } else {
897 DEBUG(1, "%s: couldn't allocate a sk_buff of"
898 " size %d.\n", dev->name, pkt_len);
899 dev->stats.rx_dropped++;
900 }
901 }
902 /* Pop the top of the Rx FIFO */
903 tc589_wait_for_completion(dev, RxDiscard);
904 }
905 if (worklimit == 0)
906 printk(KERN_WARNING "%s: too much work in el3_rx!\n", dev->name);
907 return 0;
908 }
909
910 static void set_rx_mode(struct net_device *dev)
911 {
912 unsigned int ioaddr = dev->base_addr;
913 u16 opts = SetRxFilter | RxStation | RxBroadcast;
914
915 if (dev->flags & IFF_PROMISC)
916 opts |= RxMulticast | RxProm;
917 else if (dev->mc_count || (dev->flags & IFF_ALLMULTI))
918 opts |= RxMulticast;
919 outw(opts, ioaddr + EL3_CMD);
920 }
921
922 static void set_multicast_list(struct net_device *dev)
923 {
924 struct el3_private *priv = netdev_priv(dev);
925 unsigned long flags;
926
927 spin_lock_irqsave(&priv->lock, flags);
928 set_rx_mode(dev);
929 spin_unlock_irqrestore(&priv->lock, flags);
930 }
931
932 static int el3_close(struct net_device *dev)
933 {
934 struct el3_private *lp = netdev_priv(dev);
935 struct pcmcia_device *link = lp->p_dev;
936 unsigned int ioaddr = dev->base_addr;
937
938 DEBUG(1, "%s: shutting down ethercard.\n", dev->name);
939
940 if (pcmcia_dev_present(link)) {
941 /* Turn off statistics ASAP. We update dev->stats below. */
942 outw(StatsDisable, ioaddr + EL3_CMD);
943
944 /* Disable the receiver and transmitter. */
945 outw(RxDisable, ioaddr + EL3_CMD);
946 outw(TxDisable, ioaddr + EL3_CMD);
947
948 if (dev->if_port == 2)
949 /* Turn off thinnet power. Green! */
950 outw(StopCoax, ioaddr + EL3_CMD);
951 else if (dev->if_port == 1) {
952 /* Disable link beat and jabber */
953 EL3WINDOW(4);
954 outw(0, ioaddr + WN4_MEDIA);
955 }
956
957 /* Switching back to window 0 disables the IRQ. */
958 EL3WINDOW(0);
959 /* But we explicitly zero the IRQ line select anyway. */
960 outw(0x0f00, ioaddr + WN0_IRQ);
961
962 /* Check if the card still exists */
963 if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000)
964 update_stats(dev);
965 }
966
967 link->open--;
968 netif_stop_queue(dev);
969 del_timer_sync(&lp->media);
970
971 return 0;
972 }
973
974 static struct pcmcia_device_id tc589_ids[] = {
975 PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562),
976 PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77),
977 PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589),
978 PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202),
979 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "cis/3CXEM556.cis"),
980 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "cis/3CXEM556.cis"),
981 PCMCIA_DEVICE_NULL,
982 };
983 MODULE_DEVICE_TABLE(pcmcia, tc589_ids);
984
985 static struct pcmcia_driver tc589_driver = {
986 .owner = THIS_MODULE,
987 .drv = {
988 .name = "3c589_cs",
989 },
990 .probe = tc589_probe,
991 .remove = tc589_detach,
992 .id_table = tc589_ids,
993 .suspend = tc589_suspend,
994 .resume = tc589_resume,
995 };
996
997 static int __init init_tc589(void)
998 {
999 return pcmcia_register_driver(&tc589_driver);
1000 }
1001
1002 static void __exit exit_tc589(void)
1003 {
1004 pcmcia_unregister_driver(&tc589_driver);
1005 }
1006
1007 module_init(init_tc589);
1008 module_exit(exit_tc589);
Linux for Ginger Game Console