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1da177e4 LT |
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"); |