diff options
Diffstat (limited to 'drivers/net/oaknet.c')
-rw-r--r-- | drivers/net/oaknet.c | 665 |
1 files changed, 665 insertions, 0 deletions
diff --git a/drivers/net/oaknet.c b/drivers/net/oaknet.c new file mode 100644 index 000000000000..62167a29debe --- /dev/null +++ b/drivers/net/oaknet.c | |||
@@ -0,0 +1,665 @@ | |||
1 | /* | ||
2 | * | ||
3 | * Copyright (c) 1999-2000 Grant Erickson <grant@lcse.umn.edu> | ||
4 | * | ||
5 | * Module name: oaknet.c | ||
6 | * | ||
7 | * Description: | ||
8 | * Driver for the National Semiconductor DP83902AV Ethernet controller | ||
9 | * on-board the IBM PowerPC "Oak" evaluation board. Adapted from the | ||
10 | * various other 8390 drivers written by Donald Becker and Paul Gortmaker. | ||
11 | * | ||
12 | * Additional inspiration from the "tcd8390.c" driver from TiVo, Inc. | ||
13 | * and "enetLib.c" from IBM. | ||
14 | * | ||
15 | */ | ||
16 | |||
17 | #include <linux/module.h> | ||
18 | #include <linux/errno.h> | ||
19 | #include <linux/delay.h> | ||
20 | #include <linux/netdevice.h> | ||
21 | #include <linux/etherdevice.h> | ||
22 | #include <linux/init.h> | ||
23 | |||
24 | #include <asm/board.h> | ||
25 | #include <asm/io.h> | ||
26 | |||
27 | #include "8390.h" | ||
28 | |||
29 | |||
30 | /* Preprocessor Defines */ | ||
31 | |||
32 | #if !defined(TRUE) || TRUE != 1 | ||
33 | #define TRUE 1 | ||
34 | #endif | ||
35 | |||
36 | #if !defined(FALSE) || FALSE != 0 | ||
37 | #define FALSE 0 | ||
38 | #endif | ||
39 | |||
40 | #define OAKNET_START_PG 0x20 /* First page of TX buffer */ | ||
41 | #define OAKNET_STOP_PG 0x40 /* Last pagge +1 of RX ring */ | ||
42 | |||
43 | #define OAKNET_WAIT (2 * HZ / 100) /* 20 ms */ | ||
44 | |||
45 | /* Experimenting with some fixes for a broken driver... */ | ||
46 | |||
47 | #define OAKNET_DISINT | ||
48 | #define OAKNET_HEADCHECK | ||
49 | #define OAKNET_RWFIX | ||
50 | |||
51 | |||
52 | /* Global Variables */ | ||
53 | |||
54 | static const char *name = "National DP83902AV"; | ||
55 | |||
56 | static struct net_device *oaknet_devs; | ||
57 | |||
58 | |||
59 | /* Function Prototypes */ | ||
60 | |||
61 | static int oaknet_open(struct net_device *dev); | ||
62 | static int oaknet_close(struct net_device *dev); | ||
63 | |||
64 | static void oaknet_reset_8390(struct net_device *dev); | ||
65 | static void oaknet_get_8390_hdr(struct net_device *dev, | ||
66 | struct e8390_pkt_hdr *hdr, int ring_page); | ||
67 | static void oaknet_block_input(struct net_device *dev, int count, | ||
68 | struct sk_buff *skb, int ring_offset); | ||
69 | static void oaknet_block_output(struct net_device *dev, int count, | ||
70 | const unsigned char *buf, int start_page); | ||
71 | |||
72 | static void oaknet_dma_error(struct net_device *dev, const char *name); | ||
73 | |||
74 | |||
75 | /* | ||
76 | * int oaknet_init() | ||
77 | * | ||
78 | * Description: | ||
79 | * This routine performs all the necessary platform-specific initiali- | ||
80 | * zation and set-up for the IBM "Oak" evaluation board's National | ||
81 | * Semiconductor DP83902AV "ST-NIC" Ethernet controller. | ||
82 | * | ||
83 | * Input(s): | ||
84 | * N/A | ||
85 | * | ||
86 | * Output(s): | ||
87 | * N/A | ||
88 | * | ||
89 | * Returns: | ||
90 | * 0 if OK, otherwise system error number on error. | ||
91 | * | ||
92 | */ | ||
93 | static int __init oaknet_init(void) | ||
94 | { | ||
95 | register int i; | ||
96 | int reg0, regd; | ||
97 | int ret = -ENOMEM; | ||
98 | struct net_device *dev; | ||
99 | #if 0 | ||
100 | unsigned long ioaddr = OAKNET_IO_BASE; | ||
101 | #else | ||
102 | unsigned long ioaddr = ioremap(OAKNET_IO_BASE, OAKNET_IO_SIZE); | ||
103 | #endif | ||
104 | bd_t *bip = (bd_t *)__res; | ||
105 | |||
106 | if (!ioaddr) | ||
107 | return -ENOMEM; | ||
108 | |||
109 | dev = alloc_ei_netdev(); | ||
110 | if (!dev) | ||
111 | goto out_unmap; | ||
112 | |||
113 | ret = -EBUSY; | ||
114 | if (!request_region(OAKNET_IO_BASE, OAKNET_IO_SIZE, name)) | ||
115 | goto out_dev; | ||
116 | |||
117 | /* Quick register check to see if the device is really there. */ | ||
118 | |||
119 | ret = -ENODEV; | ||
120 | if ((reg0 = ei_ibp(ioaddr)) == 0xFF) | ||
121 | goto out_region; | ||
122 | |||
123 | /* | ||
124 | * That worked. Now a more thorough check, using the multicast | ||
125 | * address registers, that the device is definitely out there | ||
126 | * and semi-functional. | ||
127 | */ | ||
128 | |||
129 | ei_obp(E8390_NODMA + E8390_PAGE1 + E8390_STOP, ioaddr + E8390_CMD); | ||
130 | regd = ei_ibp(ioaddr + 0x0D); | ||
131 | ei_obp(0xFF, ioaddr + 0x0D); | ||
132 | ei_obp(E8390_NODMA + E8390_PAGE0, ioaddr + E8390_CMD); | ||
133 | ei_ibp(ioaddr + EN0_COUNTER0); | ||
134 | |||
135 | /* It's no good. Fix things back up and leave. */ | ||
136 | |||
137 | ret = -ENODEV; | ||
138 | if (ei_ibp(ioaddr + EN0_COUNTER0) != 0) { | ||
139 | ei_obp(reg0, ioaddr); | ||
140 | ei_obp(regd, ioaddr + 0x0D); | ||
141 | goto out_region; | ||
142 | } | ||
143 | |||
144 | SET_MODULE_OWNER(dev); | ||
145 | |||
146 | /* | ||
147 | * This controller is on an embedded board, so the base address | ||
148 | * and interrupt assignments are pre-assigned and unchageable. | ||
149 | */ | ||
150 | |||
151 | dev->base_addr = ioaddr; | ||
152 | dev->irq = OAKNET_INT; | ||
153 | |||
154 | /* | ||
155 | * Disable all chip interrupts for now and ACK all pending | ||
156 | * interrupts. | ||
157 | */ | ||
158 | |||
159 | ei_obp(0x0, ioaddr + EN0_IMR); | ||
160 | ei_obp(0xFF, ioaddr + EN0_ISR); | ||
161 | |||
162 | /* Attempt to get the interrupt line */ | ||
163 | |||
164 | ret = -EAGAIN; | ||
165 | if (request_irq(dev->irq, ei_interrupt, 0, name, dev)) { | ||
166 | printk("%s: unable to request interrupt %d.\n", | ||
167 | name, dev->irq); | ||
168 | goto out_region; | ||
169 | } | ||
170 | |||
171 | /* Tell the world about what and where we've found. */ | ||
172 | |||
173 | printk("%s: %s at", dev->name, name); | ||
174 | for (i = 0; i < ETHER_ADDR_LEN; ++i) { | ||
175 | dev->dev_addr[i] = bip->bi_enetaddr[i]; | ||
176 | printk("%c%.2x", (i ? ':' : ' '), dev->dev_addr[i]); | ||
177 | } | ||
178 | printk(", found at %#lx, using IRQ %d.\n", dev->base_addr, dev->irq); | ||
179 | |||
180 | /* Set up some required driver fields and then we're done. */ | ||
181 | |||
182 | ei_status.name = name; | ||
183 | ei_status.word16 = FALSE; | ||
184 | ei_status.tx_start_page = OAKNET_START_PG; | ||
185 | ei_status.rx_start_page = OAKNET_START_PG + TX_PAGES; | ||
186 | ei_status.stop_page = OAKNET_STOP_PG; | ||
187 | |||
188 | ei_status.reset_8390 = &oaknet_reset_8390; | ||
189 | ei_status.block_input = &oaknet_block_input; | ||
190 | ei_status.block_output = &oaknet_block_output; | ||
191 | ei_status.get_8390_hdr = &oaknet_get_8390_hdr; | ||
192 | |||
193 | dev->open = oaknet_open; | ||
194 | dev->stop = oaknet_close; | ||
195 | #ifdef CONFIG_NET_POLL_CONTROLLER | ||
196 | dev->poll_controller = ei_poll; | ||
197 | #endif | ||
198 | |||
199 | NS8390_init(dev, FALSE); | ||
200 | ret = register_netdev(dev); | ||
201 | if (ret) | ||
202 | goto out_irq; | ||
203 | |||
204 | oaknet_devs = dev; | ||
205 | return 0; | ||
206 | |||
207 | out_irq; | ||
208 | free_irq(dev->irq, dev); | ||
209 | out_region: | ||
210 | release_region(OAKNET_IO_BASE, OAKNET_IO_SIZE); | ||
211 | out_dev: | ||
212 | free_netdev(dev); | ||
213 | out_unmap: | ||
214 | iounmap(ioaddr); | ||
215 | return ret; | ||
216 | } | ||
217 | |||
218 | /* | ||
219 | * static int oaknet_open() | ||
220 | * | ||
221 | * Description: | ||
222 | * This routine is a modest wrapper around ei_open, the 8390-generic, | ||
223 | * driver open routine. This just increments the module usage count | ||
224 | * and passes along the status from ei_open. | ||
225 | * | ||
226 | * Input(s): | ||
227 | * *dev - Pointer to the device structure for this driver. | ||
228 | * | ||
229 | * Output(s): | ||
230 | * *dev - Pointer to the device structure for this driver, potentially | ||
231 | * modified by ei_open. | ||
232 | * | ||
233 | * Returns: | ||
234 | * 0 if OK, otherwise < 0 on error. | ||
235 | * | ||
236 | */ | ||
237 | static int | ||
238 | oaknet_open(struct net_device *dev) | ||
239 | { | ||
240 | int status = ei_open(dev); | ||
241 | return (status); | ||
242 | } | ||
243 | |||
244 | /* | ||
245 | * static int oaknet_close() | ||
246 | * | ||
247 | * Description: | ||
248 | * This routine is a modest wrapper around ei_close, the 8390-generic, | ||
249 | * driver close routine. This just decrements the module usage count | ||
250 | * and passes along the status from ei_close. | ||
251 | * | ||
252 | * Input(s): | ||
253 | * *dev - Pointer to the device structure for this driver. | ||
254 | * | ||
255 | * Output(s): | ||
256 | * *dev - Pointer to the device structure for this driver, potentially | ||
257 | * modified by ei_close. | ||
258 | * | ||
259 | * Returns: | ||
260 | * 0 if OK, otherwise < 0 on error. | ||
261 | * | ||
262 | */ | ||
263 | static int | ||
264 | oaknet_close(struct net_device *dev) | ||
265 | { | ||
266 | int status = ei_close(dev); | ||
267 | return (status); | ||
268 | } | ||
269 | |||
270 | /* | ||
271 | * static void oaknet_reset_8390() | ||
272 | * | ||
273 | * Description: | ||
274 | * This routine resets the DP83902 chip. | ||
275 | * | ||
276 | * Input(s): | ||
277 | * *dev - Pointer to the device structure for this driver. | ||
278 | * | ||
279 | * Output(s): | ||
280 | * N/A | ||
281 | * | ||
282 | * Returns: | ||
283 | * N/A | ||
284 | * | ||
285 | */ | ||
286 | static void | ||
287 | oaknet_reset_8390(struct net_device *dev) | ||
288 | { | ||
289 | int base = E8390_BASE; | ||
290 | |||
291 | /* | ||
292 | * We have no provision of reseting the controller as is done | ||
293 | * in other drivers, such as "ne.c". However, the following | ||
294 | * seems to work well enough in the TiVo driver. | ||
295 | */ | ||
296 | |||
297 | printk("Resetting %s...\n", dev->name); | ||
298 | ei_obp(E8390_STOP | E8390_NODMA | E8390_PAGE0, base + E8390_CMD); | ||
299 | ei_status.txing = 0; | ||
300 | ei_status.dmaing = 0; | ||
301 | } | ||
302 | |||
303 | /* | ||
304 | * static void oaknet_get_8390_hdr() | ||
305 | * | ||
306 | * Description: | ||
307 | * This routine grabs the 8390-specific header. It's similar to the | ||
308 | * block input routine, but we don't need to be concerned with ring wrap | ||
309 | * as the header will be at the start of a page, so we optimize accordingly. | ||
310 | * | ||
311 | * Input(s): | ||
312 | * *dev - Pointer to the device structure for this driver. | ||
313 | * *hdr - Pointer to storage for the 8390-specific packet header. | ||
314 | * ring_page - ? | ||
315 | * | ||
316 | * Output(s): | ||
317 | * *hdr - Pointer to the 8390-specific packet header for the just- | ||
318 | * received frame. | ||
319 | * | ||
320 | * Returns: | ||
321 | * N/A | ||
322 | * | ||
323 | */ | ||
324 | static void | ||
325 | oaknet_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, | ||
326 | int ring_page) | ||
327 | { | ||
328 | int base = dev->base_addr; | ||
329 | |||
330 | /* | ||
331 | * This should NOT happen. If it does, it is the LAST thing you'll | ||
332 | * see. | ||
333 | */ | ||
334 | |||
335 | if (ei_status.dmaing) { | ||
336 | oaknet_dma_error(dev, "oaknet_get_8390_hdr"); | ||
337 | return; | ||
338 | } | ||
339 | |||
340 | ei_status.dmaing |= 0x01; | ||
341 | outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, base + OAKNET_CMD); | ||
342 | outb_p(sizeof(struct e8390_pkt_hdr), base + EN0_RCNTLO); | ||
343 | outb_p(0, base + EN0_RCNTHI); | ||
344 | outb_p(0, base + EN0_RSARLO); /* On page boundary */ | ||
345 | outb_p(ring_page, base + EN0_RSARHI); | ||
346 | outb_p(E8390_RREAD + E8390_START, base + OAKNET_CMD); | ||
347 | |||
348 | if (ei_status.word16) | ||
349 | insw(base + OAKNET_DATA, hdr, | ||
350 | sizeof(struct e8390_pkt_hdr) >> 1); | ||
351 | else | ||
352 | insb(base + OAKNET_DATA, hdr, | ||
353 | sizeof(struct e8390_pkt_hdr)); | ||
354 | |||
355 | /* Byte-swap the packet byte count */ | ||
356 | |||
357 | hdr->count = le16_to_cpu(hdr->count); | ||
358 | |||
359 | outb_p(ENISR_RDC, base + EN0_ISR); /* ACK Remote DMA interrupt */ | ||
360 | ei_status.dmaing &= ~0x01; | ||
361 | } | ||
362 | |||
363 | /* | ||
364 | * XXX - Document me. | ||
365 | */ | ||
366 | static void | ||
367 | oaknet_block_input(struct net_device *dev, int count, struct sk_buff *skb, | ||
368 | int ring_offset) | ||
369 | { | ||
370 | int base = OAKNET_BASE; | ||
371 | char *buf = skb->data; | ||
372 | |||
373 | /* | ||
374 | * This should NOT happen. If it does, it is the LAST thing you'll | ||
375 | * see. | ||
376 | */ | ||
377 | |||
378 | if (ei_status.dmaing) { | ||
379 | oaknet_dma_error(dev, "oaknet_block_input"); | ||
380 | return; | ||
381 | } | ||
382 | |||
383 | #ifdef OAKNET_DISINT | ||
384 | save_flags(flags); | ||
385 | cli(); | ||
386 | #endif | ||
387 | |||
388 | ei_status.dmaing |= 0x01; | ||
389 | ei_obp(E8390_NODMA + E8390_PAGE0 + E8390_START, base + E8390_CMD); | ||
390 | ei_obp(count & 0xff, base + EN0_RCNTLO); | ||
391 | ei_obp(count >> 8, base + EN0_RCNTHI); | ||
392 | ei_obp(ring_offset & 0xff, base + EN0_RSARLO); | ||
393 | ei_obp(ring_offset >> 8, base + EN0_RSARHI); | ||
394 | ei_obp(E8390_RREAD + E8390_START, base + E8390_CMD); | ||
395 | if (ei_status.word16) { | ||
396 | ei_isw(base + E8390_DATA, buf, count >> 1); | ||
397 | if (count & 0x01) { | ||
398 | buf[count - 1] = ei_ib(base + E8390_DATA); | ||
399 | #ifdef OAKNET_HEADCHECK | ||
400 | bytes++; | ||
401 | #endif | ||
402 | } | ||
403 | } else { | ||
404 | ei_isb(base + E8390_DATA, buf, count); | ||
405 | } | ||
406 | #ifdef OAKNET_HEADCHECK | ||
407 | /* | ||
408 | * This was for the ALPHA version only, but enough people have | ||
409 | * been encountering problems so it is still here. If you see | ||
410 | * this message you either 1) have a slightly incompatible clone | ||
411 | * or 2) have noise/speed problems with your bus. | ||
412 | */ | ||
413 | |||
414 | /* DMA termination address check... */ | ||
415 | { | ||
416 | int addr, tries = 20; | ||
417 | do { | ||
418 | /* DON'T check for 'ei_ibp(EN0_ISR) & ENISR_RDC' here | ||
419 | -- it's broken for Rx on some cards! */ | ||
420 | int high = ei_ibp(base + EN0_RSARHI); | ||
421 | int low = ei_ibp(base + EN0_RSARLO); | ||
422 | addr = (high << 8) + low; | ||
423 | if (((ring_offset + bytes) & 0xff) == low) | ||
424 | break; | ||
425 | } while (--tries > 0); | ||
426 | if (tries <= 0) | ||
427 | printk("%s: RX transfer address mismatch," | ||
428 | "%#4.4x (expected) vs. %#4.4x (actual).\n", | ||
429 | dev->name, ring_offset + bytes, addr); | ||
430 | } | ||
431 | #endif | ||
432 | ei_obp(ENISR_RDC, base + EN0_ISR); /* ACK Remote DMA interrupt */ | ||
433 | ei_status.dmaing &= ~0x01; | ||
434 | |||
435 | #ifdef OAKNET_DISINT | ||
436 | restore_flags(flags); | ||
437 | #endif | ||
438 | } | ||
439 | |||
440 | /* | ||
441 | * static void oaknet_block_output() | ||
442 | * | ||
443 | * Description: | ||
444 | * This routine... | ||
445 | * | ||
446 | * Input(s): | ||
447 | * *dev - Pointer to the device structure for this driver. | ||
448 | * count - Number of bytes to be transferred. | ||
449 | * *buf - | ||
450 | * start_page - | ||
451 | * | ||
452 | * Output(s): | ||
453 | * N/A | ||
454 | * | ||
455 | * Returns: | ||
456 | * N/A | ||
457 | * | ||
458 | */ | ||
459 | static void | ||
460 | oaknet_block_output(struct net_device *dev, int count, | ||
461 | const unsigned char *buf, int start_page) | ||
462 | { | ||
463 | int base = E8390_BASE; | ||
464 | #if 0 | ||
465 | int bug; | ||
466 | #endif | ||
467 | unsigned long start; | ||
468 | #ifdef OAKNET_DISINT | ||
469 | unsigned long flags; | ||
470 | #endif | ||
471 | #ifdef OAKNET_HEADCHECK | ||
472 | int retries = 0; | ||
473 | #endif | ||
474 | |||
475 | /* Round the count up for word writes. */ | ||
476 | |||
477 | if (ei_status.word16 && (count & 0x1)) | ||
478 | count++; | ||
479 | |||
480 | /* | ||
481 | * This should NOT happen. If it does, it is the LAST thing you'll | ||
482 | * see. | ||
483 | */ | ||
484 | |||
485 | if (ei_status.dmaing) { | ||
486 | oaknet_dma_error(dev, "oaknet_block_output"); | ||
487 | return; | ||
488 | } | ||
489 | |||
490 | #ifdef OAKNET_DISINT | ||
491 | save_flags(flags); | ||
492 | cli(); | ||
493 | #endif | ||
494 | |||
495 | ei_status.dmaing |= 0x01; | ||
496 | |||
497 | /* Make sure we are in page 0. */ | ||
498 | |||
499 | ei_obp(E8390_PAGE0 + E8390_START + E8390_NODMA, base + E8390_CMD); | ||
500 | |||
501 | #ifdef OAKNET_HEADCHECK | ||
502 | retry: | ||
503 | #endif | ||
504 | |||
505 | #if 0 | ||
506 | /* | ||
507 | * The 83902 documentation states that the processor needs to | ||
508 | * do a "dummy read" before doing the remote write to work | ||
509 | * around a chip bug they don't feel like fixing. | ||
510 | */ | ||
511 | |||
512 | bug = 0; | ||
513 | while (1) { | ||
514 | unsigned int rdhi; | ||
515 | unsigned int rdlo; | ||
516 | |||
517 | /* Now the normal output. */ | ||
518 | ei_obp(ENISR_RDC, base + EN0_ISR); | ||
519 | ei_obp(count & 0xff, base + EN0_RCNTLO); | ||
520 | ei_obp(count >> 8, base + EN0_RCNTHI); | ||
521 | ei_obp(0x00, base + EN0_RSARLO); | ||
522 | ei_obp(start_page, base + EN0_RSARHI); | ||
523 | |||
524 | if (bug++) | ||
525 | break; | ||
526 | |||
527 | /* Perform the dummy read */ | ||
528 | rdhi = ei_ibp(base + EN0_CRDAHI); | ||
529 | rdlo = ei_ibp(base + EN0_CRDALO); | ||
530 | ei_obp(E8390_RREAD + E8390_START, base + E8390_CMD); | ||
531 | |||
532 | while (1) { | ||
533 | unsigned int nrdhi; | ||
534 | unsigned int nrdlo; | ||
535 | nrdhi = ei_ibp(base + EN0_CRDAHI); | ||
536 | nrdlo = ei_ibp(base + EN0_CRDALO); | ||
537 | if ((rdhi != nrdhi) || (rdlo != nrdlo)) | ||
538 | break; | ||
539 | } | ||
540 | } | ||
541 | #else | ||
542 | #ifdef OAKNET_RWFIX | ||
543 | /* | ||
544 | * Handle the read-before-write bug the same way as the | ||
545 | * Crynwr packet driver -- the Nat'l Semi. method doesn't work. | ||
546 | * Actually this doesn't always work either, but if you have | ||
547 | * problems with your 83902 this is better than nothing! | ||
548 | */ | ||
549 | |||
550 | ei_obp(0x42, base + EN0_RCNTLO); | ||
551 | ei_obp(0x00, base + EN0_RCNTHI); | ||
552 | ei_obp(0x42, base + EN0_RSARLO); | ||
553 | ei_obp(0x00, base + EN0_RSARHI); | ||
554 | ei_obp(E8390_RREAD + E8390_START, base + E8390_CMD); | ||
555 | /* Make certain that the dummy read has occurred. */ | ||
556 | udelay(6); | ||
557 | #endif | ||
558 | |||
559 | ei_obp(ENISR_RDC, base + EN0_ISR); | ||
560 | |||
561 | /* Now the normal output. */ | ||
562 | ei_obp(count & 0xff, base + EN0_RCNTLO); | ||
563 | ei_obp(count >> 8, base + EN0_RCNTHI); | ||
564 | ei_obp(0x00, base + EN0_RSARLO); | ||
565 | ei_obp(start_page, base + EN0_RSARHI); | ||
566 | #endif /* 0/1 */ | ||
567 | |||
568 | ei_obp(E8390_RWRITE + E8390_START, base + E8390_CMD); | ||
569 | if (ei_status.word16) { | ||
570 | ei_osw(E8390_BASE + E8390_DATA, buf, count >> 1); | ||
571 | } else { | ||
572 | ei_osb(E8390_BASE + E8390_DATA, buf, count); | ||
573 | } | ||
574 | |||
575 | #ifdef OAKNET_DISINT | ||
576 | restore_flags(flags); | ||
577 | #endif | ||
578 | |||
579 | start = jiffies; | ||
580 | |||
581 | #ifdef OAKNET_HEADCHECK | ||
582 | /* | ||
583 | * This was for the ALPHA version only, but enough people have | ||
584 | * been encountering problems so it is still here. | ||
585 | */ | ||
586 | |||
587 | { | ||
588 | /* DMA termination address check... */ | ||
589 | int addr, tries = 20; | ||
590 | do { | ||
591 | int high = ei_ibp(base + EN0_RSARHI); | ||
592 | int low = ei_ibp(base + EN0_RSARLO); | ||
593 | addr = (high << 8) + low; | ||
594 | if ((start_page << 8) + count == addr) | ||
595 | break; | ||
596 | } while (--tries > 0); | ||
597 | |||
598 | if (tries <= 0) { | ||
599 | printk("%s: Tx packet transfer address mismatch," | ||
600 | "%#4.4x (expected) vs. %#4.4x (actual).\n", | ||
601 | dev->name, (start_page << 8) + count, addr); | ||
602 | if (retries++ == 0) | ||
603 | goto retry; | ||
604 | } | ||
605 | } | ||
606 | #endif | ||
607 | |||
608 | while ((ei_ibp(base + EN0_ISR) & ENISR_RDC) == 0) { | ||
609 | if (jiffies - start > OAKNET_WAIT) { | ||
610 | printk("%s: timeout waiting for Tx RDC.\n", dev->name); | ||
611 | oaknet_reset_8390(dev); | ||
612 | NS8390_init(dev, TRUE); | ||
613 | break; | ||
614 | } | ||
615 | } | ||
616 | |||
617 | ei_obp(ENISR_RDC, base + EN0_ISR); /* Ack intr. */ | ||
618 | ei_status.dmaing &= ~0x01; | ||
619 | } | ||
620 | |||
621 | /* | ||
622 | * static void oaknet_dma_error() | ||
623 | * | ||
624 | * Description: | ||
625 | * This routine prints out a last-ditch informative message to the console | ||
626 | * indicating that a DMA error occurred. If you see this, it's the last | ||
627 | * thing you'll see. | ||
628 | * | ||
629 | * Input(s): | ||
630 | * *dev - Pointer to the device structure for this driver. | ||
631 | * *name - Informative text (e.g. function name) indicating where the | ||
632 | * DMA error occurred. | ||
633 | * | ||
634 | * Output(s): | ||
635 | * N/A | ||
636 | * | ||
637 | * Returns: | ||
638 | * N/A | ||
639 | * | ||
640 | */ | ||
641 | static void | ||
642 | oaknet_dma_error(struct net_device *dev, const char *name) | ||
643 | { | ||
644 | printk(KERN_EMERG "%s: DMAing conflict in %s." | ||
645 | "[DMAstat:%d][irqlock:%d][intr:%ld]\n", | ||
646 | dev->name, name, ei_status.dmaing, ei_status.irqlock, | ||
647 | dev->interrupt); | ||
648 | } | ||
649 | |||
650 | /* | ||
651 | * Oak Ethernet module unload interface. | ||
652 | */ | ||
653 | static void __exit oaknet_cleanup_module (void) | ||
654 | { | ||
655 | /* Convert to loop once driver supports multiple devices. */ | ||
656 | unregister_netdev(oaknet_dev); | ||
657 | free_irq(oaknet_devs->irq, oaknet_devs); | ||
658 | release_region(oaknet_devs->base_addr, OAKNET_IO_SIZE); | ||
659 | iounmap(ioaddr); | ||
660 | free_netdev(oaknet_devs); | ||
661 | } | ||
662 | |||
663 | module_init(oaknet_init); | ||
664 | module_exit(oaknet_cleanup_module); | ||
665 | MODULE_LICENSE("GPL"); | ||