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net: variables reach -1, but 0 tested
[linux-2.6/mini2440.git] / drivers / net / pcmcia / 3c589_cs.c
blob73ecc657999d69e899e4ddb2537e6aa1db376b1d
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 int el3_start_xmit(struct sk_buff *skb, struct net_device *dev);
153 static irqreturn_t el3_interrupt(int irq, void *dev_id);
154 static void update_stats(struct net_device *dev);
155 static struct net_device_stats *el3_get_stats(struct net_device *dev);
156 static int el3_rx(struct net_device *dev);
157 static int el3_close(struct net_device *dev);
158 static void el3_tx_timeout(struct net_device *dev);
159 static void set_multicast_list(struct net_device *dev);
160 static const struct ethtool_ops netdev_ethtool_ops;
161
162 static void tc589_detach(struct pcmcia_device *p_dev);
163
164 /*======================================================================
165
166 tc589_attach() creates an "instance" of the driver, allocating
167 local data structures for one device. The device is registered
168 with Card Services.
169
170 ======================================================================*/
171
172 static int tc589_probe(struct pcmcia_device *link)
173 {
174 struct el3_private *lp;
175 struct net_device *dev;
176
177 DEBUG(0, "3c589_attach()\n");
178
179 /* Create new ethernet device */
180 dev = alloc_etherdev(sizeof(struct el3_private));
181 if (!dev)
182 return -ENOMEM;
183 lp = netdev_priv(dev);
184 link->priv = dev;
185 lp->p_dev = link;
186
187 spin_lock_init(&lp->lock);
188 link->io.NumPorts1 = 16;
189 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
190 link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_HANDLE_PRESENT;
191 link->irq.IRQInfo1 = IRQ_LEVEL_ID;
192 link->irq.Handler = &el3_interrupt;
193 link->irq.Instance = dev;
194 link->conf.Attributes = CONF_ENABLE_IRQ;
195 link->conf.IntType = INT_MEMORY_AND_IO;
196 link->conf.ConfigIndex = 1;
197
198 /* The EL3-specific entries in the device structure. */
199 dev->hard_start_xmit = &el3_start_xmit;
200 dev->set_config = &el3_config;
201 dev->get_stats = &el3_get_stats;
202 dev->set_multicast_list = &set_multicast_list;
203 dev->open = &el3_open;
204 dev->stop = &el3_close;
205 #ifdef HAVE_TX_TIMEOUT
206 dev->tx_timeout = el3_tx_timeout;
207 dev->watchdog_timeo = TX_TIMEOUT;
208 #endif
209 SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
210
211 return tc589_config(link);
212 } /* tc589_attach */
213
214 /*======================================================================
215
216 This deletes a driver "instance". The device is de-registered
217 with Card Services. If it has been released, all local data
218 structures are freed. Otherwise, the structures will be freed
219 when the device is released.
220
221 ======================================================================*/
222
223 static void tc589_detach(struct pcmcia_device *link)
224 {
225 struct net_device *dev = link->priv;
226
227 DEBUG(0, "3c589_detach(0x%p)\n", link);
228
229 if (link->dev_node)
230 unregister_netdev(dev);
231
232 tc589_release(link);
233
234 free_netdev(dev);
235 } /* tc589_detach */
236
237 /*======================================================================
238
239 tc589_config() is scheduled to run after a CARD_INSERTION event
240 is received, to configure the PCMCIA socket, and to make the
241 ethernet device available to the system.
242
243 ======================================================================*/
244
245 #define CS_CHECK(fn, ret) \
246 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
247
248 static int tc589_config(struct pcmcia_device *link)
249 {
250 struct net_device *dev = link->priv;
251 struct el3_private *lp = netdev_priv(dev);
252 tuple_t tuple;
253 __le16 buf[32];
254 __be16 *phys_addr;
255 int last_fn, last_ret, i, j, multi = 0, fifo;
256 unsigned int ioaddr;
257 char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
258
259 DEBUG(0, "3c589_config(0x%p)\n", link);
260
261 phys_addr = (__be16 *)dev->dev_addr;
262 tuple.Attributes = 0;
263 tuple.TupleData = (cisdata_t *)buf;
264 tuple.TupleDataMax = sizeof(buf);
265 tuple.TupleOffset = 0;
266 tuple.Attributes = TUPLE_RETURN_COMMON;
267
268 /* Is this a 3c562? */
269 if (link->manf_id != MANFID_3COM)
270 printk(KERN_INFO "3c589_cs: hmmm, is this really a "
271 "3Com card??\n");
272 multi = (link->card_id == PRODID_3COM_3C562);
273
274 /* For the 3c562, the base address must be xx00-xx7f */
275 link->io.IOAddrLines = 16;
276 for (i = j = 0; j < 0x400; j += 0x10) {
277 if (multi && (j & 0x80)) continue;
278 link->io.BasePort1 = j ^ 0x300;
279 i = pcmcia_request_io(link, &link->io);
280 if (i == 0)
281 break;
282 }
283 if (i != 0) {
284 cs_error(link, RequestIO, i);
285 goto failed;
286 }
287 CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
288 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
289
290 dev->irq = link->irq.AssignedIRQ;
291 dev->base_addr = link->io.BasePort1;
292 ioaddr = dev->base_addr;
293 EL3WINDOW(0);
294
295 /* The 3c589 has an extra EEPROM for configuration info, including
296 the hardware address. The 3c562 puts the address in the CIS. */
297 tuple.DesiredTuple = 0x88;
298 if (pcmcia_get_first_tuple(link, &tuple) == 0) {
299 pcmcia_get_tuple_data(link, &tuple);
300 for (i = 0; i < 3; i++)
301 phys_addr[i] = htons(le16_to_cpu(buf[i]));
302 } else {
303 for (i = 0; i < 3; i++)
304 phys_addr[i] = htons(read_eeprom(ioaddr, i));
305 if (phys_addr[0] == htons(0x6060)) {
306 printk(KERN_ERR "3c589_cs: IO port conflict at 0x%03lx"
307 "-0x%03lx\n", dev->base_addr, dev->base_addr+15);
308 goto failed;
309 }
310 }
311
312 /* The address and resource configuration register aren't loaded from
313 the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version. */
314 outw(0x3f00, ioaddr + 8);
315 fifo = inl(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 printk(KERN_ERR "3c589_cs: invalid if_port requested\n");
322
323 link->dev_node = &lp->node;
324 SET_NETDEV_DEV(dev, &handle_to_dev(link));
325
326 if (register_netdev(dev) != 0) {
327 printk(KERN_ERR "3c589_cs: register_netdev() failed\n");
328 link->dev_node = NULL;
329 goto failed;
330 }
331
332 strcpy(lp->node.dev_name, dev->name);
333
334 printk(KERN_INFO "%s: 3Com 3c%s, io %#3lx, irq %d, "
335 "hw_addr %pM\n",
336 dev->name, (multi ? "562" : "589"), dev->base_addr, dev->irq,
337 dev->dev_addr);
338 printk(KERN_INFO " %dK FIFO split %s Rx:Tx, %s xcvr\n",
339 (fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3],
340 if_names[dev->if_port]);
341 return 0;
342
343 cs_failed:
344 cs_error(link, last_fn, last_ret);
345 failed:
346 tc589_release(link);
347 return -ENODEV;
348 } /* tc589_config */
349
350 /*======================================================================
351
352 After a card is removed, tc589_release() will unregister the net
353 device, and release the PCMCIA configuration. If the device is
354 still open, this will be postponed until it is closed.
355
356 ======================================================================*/
357
358 static void tc589_release(struct pcmcia_device *link)
359 {
360 pcmcia_disable_device(link);
361 }
362
363 static int tc589_suspend(struct pcmcia_device *link)
364 {
365 struct net_device *dev = link->priv;
366
367 if (link->open)
368 netif_device_detach(dev);
369
370 return 0;
371 }
372
373 static int tc589_resume(struct pcmcia_device *link)
374 {
375 struct net_device *dev = link->priv;
376
377 if (link->open) {
378 tc589_reset(dev);
379 netif_device_attach(dev);
380 }
381
382 return 0;
383 }
384
385 /*====================================================================*/
386
387 /*
388 Use this for commands that may take time to finish
389 */
390 static void tc589_wait_for_completion(struct net_device *dev, int cmd)
391 {
392 int i = 100;
393 outw(cmd, dev->base_addr + EL3_CMD);
394 while (--i > 0)
395 if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break;
396 if (i == 0)
397 printk(KERN_WARNING "%s: command 0x%04x did not complete!\n",
398 dev->name, cmd);
399 }
400
401 /*
402 Read a word from the EEPROM using the regular EEPROM access register.
403 Assume that we are in register window zero.
404 */
405 static u16 read_eeprom(unsigned int ioaddr, int index)
406 {
407 int i;
408 outw(EEPROM_READ + index, ioaddr + 10);
409 /* Reading the eeprom takes 162 us */
410 for (i = 1620; i >= 0; i--)
411 if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
412 break;
413 return inw(ioaddr + 12);
414 }
415
416 /*
417 Set transceiver type, perhaps to something other than what the user
418 specified in dev->if_port.
419 */
420 static void tc589_set_xcvr(struct net_device *dev, int if_port)
421 {
422 struct el3_private *lp = netdev_priv(dev);
423 unsigned int ioaddr = dev->base_addr;
424
425 EL3WINDOW(0);
426 switch (if_port) {
427 case 0: case 1: outw(0, ioaddr + 6); break;
428 case 2: outw(3<<14, ioaddr + 6); break;
429 case 3: outw(1<<14, ioaddr + 6); break;
430 }
431 /* On PCMCIA, this just turns on the LED */
432 outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD);
433 /* 10baseT interface, enable link beat and jabber check. */
434 EL3WINDOW(4);
435 outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA);
436 EL3WINDOW(1);
437 if (if_port == 2)
438 lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000);
439 else
440 lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800);
441 }
442
443 static void dump_status(struct net_device *dev)
444 {
445 unsigned int ioaddr = dev->base_addr;
446 EL3WINDOW(1);
447 printk(KERN_INFO " irq status %04x, rx status %04x, tx status "
448 "%02x tx free %04x\n", inw(ioaddr+EL3_STATUS),
449 inw(ioaddr+RX_STATUS), inb(ioaddr+TX_STATUS),
450 inw(ioaddr+TX_FREE));
451 EL3WINDOW(4);
452 printk(KERN_INFO " diagnostics: fifo %04x net %04x ethernet %04x"
453 " media %04x\n", inw(ioaddr+0x04), inw(ioaddr+0x06),
454 inw(ioaddr+0x08), inw(ioaddr+0x0a));
455 EL3WINDOW(1);
456 }
457
458 /* Reset and restore all of the 3c589 registers. */
459 static void tc589_reset(struct net_device *dev)
460 {
461 unsigned int ioaddr = dev->base_addr;
462 int i;
463
464 EL3WINDOW(0);
465 outw(0x0001, ioaddr + 4); /* Activate board. */
466 outw(0x3f00, ioaddr + 8); /* Set the IRQ line. */
467
468 /* Set the station address in window 2. */
469 EL3WINDOW(2);
470 for (i = 0; i < 6; i++)
471 outb(dev->dev_addr[i], ioaddr + i);
472
473 tc589_set_xcvr(dev, dev->if_port);
474
475 /* Switch to the stats window, and clear all stats by reading. */
476 outw(StatsDisable, ioaddr + EL3_CMD);
477 EL3WINDOW(6);
478 for (i = 0; i < 9; i++)
479 inb(ioaddr+i);
480 inw(ioaddr + 10);
481 inw(ioaddr + 12);
482
483 /* Switch to register set 1 for normal use. */
484 EL3WINDOW(1);
485
486 /* Accept b-cast and phys addr only. */
487 outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD);
488 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
489 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
490 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
491 /* Allow status bits to be seen. */
492 outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
493 /* Ack all pending events, and set active indicator mask. */
494 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
495 ioaddr + EL3_CMD);
496 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
497 | AdapterFailure, ioaddr + EL3_CMD);
498 }
499
500 static void netdev_get_drvinfo(struct net_device *dev,
501 struct ethtool_drvinfo *info)
502 {
503 strcpy(info->driver, DRV_NAME);
504 strcpy(info->version, DRV_VERSION);
505 sprintf(info->bus_info, "PCMCIA 0x%lx", dev->base_addr);
506 }
507
508 #ifdef PCMCIA_DEBUG
509 static u32 netdev_get_msglevel(struct net_device *dev)
510 {
511 return pc_debug;
512 }
513
514 static void netdev_set_msglevel(struct net_device *dev, u32 level)
515 {
516 pc_debug = level;
517 }
518 #endif /* PCMCIA_DEBUG */
519
520 static const struct ethtool_ops netdev_ethtool_ops = {
521 .get_drvinfo = netdev_get_drvinfo,
522 #ifdef PCMCIA_DEBUG
523 .get_msglevel = netdev_get_msglevel,
524 .set_msglevel = netdev_set_msglevel,
525 #endif /* PCMCIA_DEBUG */
526 };
527
528 static int el3_config(struct net_device *dev, struct ifmap *map)
529 {
530 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
531 if (map->port <= 3) {
532 dev->if_port = map->port;
533 printk(KERN_INFO "%s: switched to %s port\n",
534 dev->name, if_names[dev->if_port]);
535 tc589_set_xcvr(dev, dev->if_port);
536 } else
537 return -EINVAL;
538 }
539 return 0;
540 }
541
542 static int el3_open(struct net_device *dev)
543 {
544 struct el3_private *lp = netdev_priv(dev);
545 struct pcmcia_device *link = lp->p_dev;
546
547 if (!pcmcia_dev_present(link))
548 return -ENODEV;
549
550 link->open++;
551 netif_start_queue(dev);
552
553 tc589_reset(dev);
554 init_timer(&lp->media);
555 lp->media.function = &media_check;
556 lp->media.data = (unsigned long) dev;
557 lp->media.expires = jiffies + HZ;
558 add_timer(&lp->media);
559
560 DEBUG(1, "%s: opened, status %4.4x.\n",
561 dev->name, inw(dev->base_addr + EL3_STATUS));
562
563 return 0;
564 }
565
566 static void el3_tx_timeout(struct net_device *dev)
567 {
568 unsigned int ioaddr = dev->base_addr;
569
570 printk(KERN_WARNING "%s: Transmit timed out!\n", dev->name);
571 dump_status(dev);
572 dev->stats.tx_errors++;
573 dev->trans_start = jiffies;
574 /* Issue TX_RESET and TX_START commands. */
575 tc589_wait_for_completion(dev, TxReset);
576 outw(TxEnable, ioaddr + EL3_CMD);
577 netif_wake_queue(dev);
578 }
579
580 static void pop_tx_status(struct net_device *dev)
581 {
582 unsigned int ioaddr = dev->base_addr;
583 int i;
584
585 /* Clear the Tx status stack. */
586 for (i = 32; i > 0; i--) {
587 u_char tx_status = inb(ioaddr + TX_STATUS);
588 if (!(tx_status & 0x84)) break;
589 /* reset transmitter on jabber error or underrun */
590 if (tx_status & 0x30)
591 tc589_wait_for_completion(dev, TxReset);
592 if (tx_status & 0x38) {
593 DEBUG(1, "%s: transmit error: status 0x%02x\n",
594 dev->name, tx_status);
595 outw(TxEnable, ioaddr + EL3_CMD);
596 dev->stats.tx_aborted_errors++;
597 }
598 outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
599 }
600 }
601
602 static int el3_start_xmit(struct sk_buff *skb, struct net_device *dev)
603 {
604 unsigned int ioaddr = dev->base_addr;
605 struct el3_private *priv = netdev_priv(dev);
606 unsigned long flags;
607
608 DEBUG(3, "%s: el3_start_xmit(length = %ld) called, "
609 "status %4.4x.\n", dev->name, (long)skb->len,
610 inw(ioaddr + EL3_STATUS));
611
612 spin_lock_irqsave(&priv->lock, flags);
613
614 dev->stats.tx_bytes += skb->len;
615
616 /* Put out the doubleword header... */
617 outw(skb->len, ioaddr + TX_FIFO);
618 outw(0x00, ioaddr + TX_FIFO);
619 /* ... and the packet rounded to a doubleword. */
620 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
621
622 dev->trans_start = jiffies;
623 if (inw(ioaddr + TX_FREE) <= 1536) {
624 netif_stop_queue(dev);
625 /* Interrupt us when the FIFO has room for max-sized packet. */
626 outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
627 }
628
629 pop_tx_status(dev);
630 spin_unlock_irqrestore(&priv->lock, flags);
631 dev_kfree_skb(skb);
632
633 return 0;
634 }
635
636 /* The EL3 interrupt handler. */
637 static irqreturn_t el3_interrupt(int irq, void *dev_id)
638 {
639 struct net_device *dev = (struct net_device *) dev_id;
640 struct el3_private *lp = netdev_priv(dev);
641 unsigned int ioaddr;
642 __u16 status;
643 int i = 0, handled = 1;
644
645 if (!netif_device_present(dev))
646 return IRQ_NONE;
647
648 ioaddr = dev->base_addr;
649
650 DEBUG(3, "%s: interrupt, status %4.4x.\n",
651 dev->name, inw(ioaddr + EL3_STATUS));
652
653 spin_lock(&lp->lock);
654 while ((status = inw(ioaddr + EL3_STATUS)) &
655 (IntLatch | RxComplete | StatsFull)) {
656 if ((status & 0xe000) != 0x2000) {
657 DEBUG(1, "%s: interrupt from dead card\n", dev->name);
658 handled = 0;
659 break;
660 }
661
662 if (status & RxComplete)
663 el3_rx(dev);
664
665 if (status & TxAvailable) {
666 DEBUG(3, " TX room bit was handled.\n");
667 /* There's room in the FIFO for a full-sized packet. */
668 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
669 netif_wake_queue(dev);
670 }
671
672 if (status & TxComplete)
673 pop_tx_status(dev);
674
675 if (status & (AdapterFailure | RxEarly | StatsFull)) {
676 /* Handle all uncommon interrupts. */
677 if (status & StatsFull) /* Empty statistics. */
678 update_stats(dev);
679 if (status & RxEarly) { /* Rx early is unused. */
680 el3_rx(dev);
681 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
682 }
683 if (status & AdapterFailure) {
684 u16 fifo_diag;
685 EL3WINDOW(4);
686 fifo_diag = inw(ioaddr + 4);
687 EL3WINDOW(1);
688 printk(KERN_WARNING "%s: adapter failure, FIFO diagnostic"
689 " register %04x.\n", dev->name, fifo_diag);
690 if (fifo_diag & 0x0400) {
691 /* Tx overrun */
692 tc589_wait_for_completion(dev, TxReset);
693 outw(TxEnable, ioaddr + EL3_CMD);
694 }
695 if (fifo_diag & 0x2000) {
696 /* Rx underrun */
697 tc589_wait_for_completion(dev, RxReset);
698 set_multicast_list(dev);
699 outw(RxEnable, ioaddr + EL3_CMD);
700 }
701 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
702 }
703 }
704
705 if (++i > 10) {
706 printk(KERN_ERR "%s: infinite loop in interrupt, "
707 "status %4.4x.\n", dev->name, status);
708 /* Clear all interrupts */
709 outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
710 break;
711 }
712 /* Acknowledge the IRQ. */
713 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
714 }
715
716 lp->last_irq = jiffies;
717 spin_unlock(&lp->lock);
718 DEBUG(3, "%s: exiting interrupt, status %4.4x.\n",
719 dev->name, inw(ioaddr + EL3_STATUS));
720 return IRQ_RETVAL(handled);
721 }
722
723 static void media_check(unsigned long arg)
724 {
725 struct net_device *dev = (struct net_device *)(arg);
726 struct el3_private *lp = netdev_priv(dev);
727 unsigned int ioaddr = dev->base_addr;
728 u16 media, errs;
729 unsigned long flags;
730
731 if (!netif_device_present(dev)) goto reschedule;
732
733 /* Check for pending interrupt with expired latency timer: with
734 this, we can limp along even if the interrupt is blocked */
735 if ((inw(ioaddr + EL3_STATUS) & IntLatch) &&
736 (inb(ioaddr + EL3_TIMER) == 0xff)) {
737 if (!lp->fast_poll)
738 printk(KERN_WARNING "%s: interrupt(s) dropped!\n", dev->name);
739 el3_interrupt(dev->irq, dev);
740 lp->fast_poll = HZ;
741 }
742 if (lp->fast_poll) {
743 lp->fast_poll--;
744 lp->media.expires = jiffies + HZ/100;
745 add_timer(&lp->media);
746 return;
747 }
748
749 /* lp->lock guards the EL3 window. Window should always be 1 except
750 when the lock is held */
751 spin_lock_irqsave(&lp->lock, flags);
752 EL3WINDOW(4);
753 media = inw(ioaddr+WN4_MEDIA) & 0xc810;
754
755 /* Ignore collisions unless we've had no irq's recently */
756 if (time_before(jiffies, lp->last_irq + HZ)) {
757 media &= ~0x0010;
758 } else {
759 /* Try harder to detect carrier errors */
760 EL3WINDOW(6);
761 outw(StatsDisable, ioaddr + EL3_CMD);
762 errs = inb(ioaddr + 0);
763 outw(StatsEnable, ioaddr + EL3_CMD);
764 dev->stats.tx_carrier_errors += errs;
765 if (errs || (lp->media_status & 0x0010)) media |= 0x0010;
766 }
767
768 if (media != lp->media_status) {
769 if ((media & lp->media_status & 0x8000) &&
770 ((lp->media_status ^ media) & 0x0800))
771 printk(KERN_INFO "%s: %s link beat\n", dev->name,
772 (lp->media_status & 0x0800 ? "lost" : "found"));
773 else if ((media & lp->media_status & 0x4000) &&
774 ((lp->media_status ^ media) & 0x0010))
775 printk(KERN_INFO "%s: coax cable %s\n", dev->name,
776 (lp->media_status & 0x0010 ? "ok" : "problem"));
777 if (dev->if_port == 0) {
778 if (media & 0x8000) {
779 if (media & 0x0800)
780 printk(KERN_INFO "%s: flipped to 10baseT\n",
781 dev->name);
782 else
783 tc589_set_xcvr(dev, 2);
784 } else if (media & 0x4000) {
785 if (media & 0x0010)
786 tc589_set_xcvr(dev, 1);
787 else
788 printk(KERN_INFO "%s: flipped to 10base2\n",
789 dev->name);
790 }
791 }
792 lp->media_status = media;
793 }
794
795 EL3WINDOW(1);
796 spin_unlock_irqrestore(&lp->lock, flags);
797
798 reschedule:
799 lp->media.expires = jiffies + HZ;
800 add_timer(&lp->media);
801 }
802
803 static struct net_device_stats *el3_get_stats(struct net_device *dev)
804 {
805 struct el3_private *lp = netdev_priv(dev);
806 unsigned long flags;
807 struct pcmcia_device *link = lp->p_dev;
808
809 if (pcmcia_dev_present(link)) {
810 spin_lock_irqsave(&lp->lock, flags);
811 update_stats(dev);
812 spin_unlock_irqrestore(&lp->lock, flags);
813 }
814 return &dev->stats;
815 }
816
817 /*
818 Update statistics. We change to register window 6, so this should be run
819 single-threaded if the device is active. This is expected to be a rare
820 operation, and it's simpler for the rest of the driver to assume that
821 window 1 is always valid rather than use a special window-state variable.
822
823 Caller must hold the lock for this
824 */
825 static void update_stats(struct net_device *dev)
826 {
827 unsigned int ioaddr = dev->base_addr;
828
829 DEBUG(2, "%s: updating the statistics.\n", dev->name);
830 /* Turn off statistics updates while reading. */
831 outw(StatsDisable, ioaddr + EL3_CMD);
832 /* Switch to the stats window, and read everything. */
833 EL3WINDOW(6);
834 dev->stats.tx_carrier_errors += inb(ioaddr + 0);
835 dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
836 /* Multiple collisions. */ inb(ioaddr + 2);
837 dev->stats.collisions += inb(ioaddr + 3);
838 dev->stats.tx_window_errors += inb(ioaddr + 4);
839 dev->stats.rx_fifo_errors += inb(ioaddr + 5);
840 dev->stats.tx_packets += inb(ioaddr + 6);
841 /* Rx packets */ inb(ioaddr + 7);
842 /* Tx deferrals */ inb(ioaddr + 8);
843 /* Rx octets */ inw(ioaddr + 10);
844 /* Tx octets */ inw(ioaddr + 12);
845
846 /* Back to window 1, and turn statistics back on. */
847 EL3WINDOW(1);
848 outw(StatsEnable, ioaddr + EL3_CMD);
849 }
850
851 static int el3_rx(struct net_device *dev)
852 {
853 unsigned int ioaddr = dev->base_addr;
854 int worklimit = 32;
855 short rx_status;
856
857 DEBUG(3, "%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n",
858 dev->name, inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
859 while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
860 (--worklimit >= 0)) {
861 if (rx_status & 0x4000) { /* Error, update stats. */
862 short error = rx_status & 0x3800;
863 dev->stats.rx_errors++;
864 switch (error) {
865 case 0x0000: dev->stats.rx_over_errors++; break;
866 case 0x0800: dev->stats.rx_length_errors++; break;
867 case 0x1000: dev->stats.rx_frame_errors++; break;
868 case 0x1800: dev->stats.rx_length_errors++; break;
869 case 0x2000: dev->stats.rx_frame_errors++; break;
870 case 0x2800: dev->stats.rx_crc_errors++; break;
871 }
872 } else {
873 short pkt_len = rx_status & 0x7ff;
874 struct sk_buff *skb;
875
876 skb = dev_alloc_skb(pkt_len+5);
877
878 DEBUG(3, " Receiving packet size %d status %4.4x.\n",
879 pkt_len, rx_status);
880 if (skb != NULL) {
881 skb_reserve(skb, 2);
882 insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
883 (pkt_len+3)>>2);
884 skb->protocol = eth_type_trans(skb, dev);
885 netif_rx(skb);
886 dev->stats.rx_packets++;
887 dev->stats.rx_bytes += pkt_len;
888 } else {
889 DEBUG(1, "%s: couldn't allocate a sk_buff of"
890 " size %d.\n", dev->name, pkt_len);
891 dev->stats.rx_dropped++;
892 }
893 }
894 /* Pop the top of the Rx FIFO */
895 tc589_wait_for_completion(dev, RxDiscard);
896 }
897 if (worklimit == 0)
898 printk(KERN_WARNING "%s: too much work in el3_rx!\n", dev->name);
899 return 0;
900 }
901
902 static void set_multicast_list(struct net_device *dev)
903 {
904 struct el3_private *lp = netdev_priv(dev);
905 struct pcmcia_device *link = lp->p_dev;
906 unsigned int ioaddr = dev->base_addr;
907 u16 opts = SetRxFilter | RxStation | RxBroadcast;
908
909 if (!pcmcia_dev_present(link)) return;
910 if (dev->flags & IFF_PROMISC)
911 opts |= RxMulticast | RxProm;
912 else if (dev->mc_count || (dev->flags & IFF_ALLMULTI))
913 opts |= RxMulticast;
914 outw(opts, ioaddr + EL3_CMD);
915 }
916
917 static int el3_close(struct net_device *dev)
918 {
919 struct el3_private *lp = netdev_priv(dev);
920 struct pcmcia_device *link = lp->p_dev;
921 unsigned int ioaddr = dev->base_addr;
922
923 DEBUG(1, "%s: shutting down ethercard.\n", dev->name);
924
925 if (pcmcia_dev_present(link)) {
926 /* Turn off statistics ASAP. We update dev->stats below. */
927 outw(StatsDisable, ioaddr + EL3_CMD);
928
929 /* Disable the receiver and transmitter. */
930 outw(RxDisable, ioaddr + EL3_CMD);
931 outw(TxDisable, ioaddr + EL3_CMD);
932
933 if (dev->if_port == 2)
934 /* Turn off thinnet power. Green! */
935 outw(StopCoax, ioaddr + EL3_CMD);
936 else if (dev->if_port == 1) {
937 /* Disable link beat and jabber */
938 EL3WINDOW(4);
939 outw(0, ioaddr + WN4_MEDIA);
940 }
941
942 /* Switching back to window 0 disables the IRQ. */
943 EL3WINDOW(0);
944 /* But we explicitly zero the IRQ line select anyway. */
945 outw(0x0f00, ioaddr + WN0_IRQ);
946
947 /* Check if the card still exists */
948 if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000)
949 update_stats(dev);
950 }
951
952 link->open--;
953 netif_stop_queue(dev);
954 del_timer_sync(&lp->media);
955
956 return 0;
957 }
958
959 static struct pcmcia_device_id tc589_ids[] = {
960 PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562),
961 PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77),
962 PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589),
963 PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202),
964 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "3CXEM556.cis"),
965 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "3CXEM556.cis"),
966 PCMCIA_DEVICE_NULL,
967 };
968 MODULE_DEVICE_TABLE(pcmcia, tc589_ids);
969
970 static struct pcmcia_driver tc589_driver = {
971 .owner = THIS_MODULE,
972 .drv = {
973 .name = "3c589_cs",
974 },
975 .probe = tc589_probe,
976 .remove = tc589_detach,
977 .id_table = tc589_ids,
978 .suspend = tc589_suspend,
979 .resume = tc589_resume,
980 };
981
982 static int __init init_tc589(void)
983 {
984 return pcmcia_register_driver(&tc589_driver);
985 }
986
987 static void __exit exit_tc589(void)
988 {
989 pcmcia_unregister_driver(&tc589_driver);
990 }
991
992 module_init(init_tc589);
993 module_exit(exit_tc589);
Support for the Chinese Samsung S3C2440 based development boards