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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> | |
ff5688ae | 23 | #include <linux/jiffies.h> |
1da177e4 LT |
24 | |
25 | #include <asm/board.h> | |
26 | #include <asm/io.h> | |
27 | ||
28 | #include "8390.h" | |
29 | ||
30 | ||
31 | /* Preprocessor Defines */ | |
32 | ||
33 | #if !defined(TRUE) || TRUE != 1 | |
34 | #define TRUE 1 | |
35 | #endif | |
36 | ||
37 | #if !defined(FALSE) || FALSE != 0 | |
38 | #define FALSE 0 | |
39 | #endif | |
40 | ||
41 | #define OAKNET_START_PG 0x20 /* First page of TX buffer */ | |
42 | #define OAKNET_STOP_PG 0x40 /* Last pagge +1 of RX ring */ | |
43 | ||
44 | #define OAKNET_WAIT (2 * HZ / 100) /* 20 ms */ | |
45 | ||
46 | /* Experimenting with some fixes for a broken driver... */ | |
47 | ||
48 | #define OAKNET_DISINT | |
49 | #define OAKNET_HEADCHECK | |
50 | #define OAKNET_RWFIX | |
51 | ||
52 | ||
53 | /* Global Variables */ | |
54 | ||
55 | static const char *name = "National DP83902AV"; | |
56 | ||
57 | static struct net_device *oaknet_devs; | |
58 | ||
59 | ||
60 | /* Function Prototypes */ | |
61 | ||
62 | static int oaknet_open(struct net_device *dev); | |
63 | static int oaknet_close(struct net_device *dev); | |
64 | ||
65 | static void oaknet_reset_8390(struct net_device *dev); | |
66 | static void oaknet_get_8390_hdr(struct net_device *dev, | |
67 | struct e8390_pkt_hdr *hdr, int ring_page); | |
68 | static void oaknet_block_input(struct net_device *dev, int count, | |
69 | struct sk_buff *skb, int ring_offset); | |
70 | static void oaknet_block_output(struct net_device *dev, int count, | |
71 | const unsigned char *buf, int start_page); | |
72 | ||
73 | static void oaknet_dma_error(struct net_device *dev, const char *name); | |
74 | ||
75 | ||
76 | /* | |
77 | * int oaknet_init() | |
78 | * | |
79 | * Description: | |
80 | * This routine performs all the necessary platform-specific initiali- | |
81 | * zation and set-up for the IBM "Oak" evaluation board's National | |
82 | * Semiconductor DP83902AV "ST-NIC" Ethernet controller. | |
83 | * | |
84 | * Input(s): | |
85 | * N/A | |
86 | * | |
87 | * Output(s): | |
88 | * N/A | |
89 | * | |
90 | * Returns: | |
91 | * 0 if OK, otherwise system error number on error. | |
92 | * | |
93 | */ | |
94 | static int __init oaknet_init(void) | |
95 | { | |
96 | register int i; | |
97 | int reg0, regd; | |
98 | int ret = -ENOMEM; | |
99 | struct net_device *dev; | |
100 | #if 0 | |
101 | unsigned long ioaddr = OAKNET_IO_BASE; | |
102 | #else | |
103 | unsigned long ioaddr = ioremap(OAKNET_IO_BASE, OAKNET_IO_SIZE); | |
104 | #endif | |
105 | bd_t *bip = (bd_t *)__res; | |
106 | ||
107 | if (!ioaddr) | |
108 | return -ENOMEM; | |
109 | ||
110 | dev = alloc_ei_netdev(); | |
111 | if (!dev) | |
112 | goto out_unmap; | |
113 | ||
114 | ret = -EBUSY; | |
115 | if (!request_region(OAKNET_IO_BASE, OAKNET_IO_SIZE, name)) | |
116 | goto out_dev; | |
117 | ||
118 | /* Quick register check to see if the device is really there. */ | |
119 | ||
120 | ret = -ENODEV; | |
121 | if ((reg0 = ei_ibp(ioaddr)) == 0xFF) | |
122 | goto out_region; | |
123 | ||
124 | /* | |
125 | * That worked. Now a more thorough check, using the multicast | |
126 | * address registers, that the device is definitely out there | |
127 | * and semi-functional. | |
128 | */ | |
129 | ||
130 | ei_obp(E8390_NODMA + E8390_PAGE1 + E8390_STOP, ioaddr + E8390_CMD); | |
131 | regd = ei_ibp(ioaddr + 0x0D); | |
132 | ei_obp(0xFF, ioaddr + 0x0D); | |
133 | ei_obp(E8390_NODMA + E8390_PAGE0, ioaddr + E8390_CMD); | |
134 | ei_ibp(ioaddr + EN0_COUNTER0); | |
135 | ||
136 | /* It's no good. Fix things back up and leave. */ | |
137 | ||
138 | ret = -ENODEV; | |
139 | if (ei_ibp(ioaddr + EN0_COUNTER0) != 0) { | |
140 | ei_obp(reg0, ioaddr); | |
141 | ei_obp(regd, ioaddr + 0x0D); | |
142 | goto out_region; | |
143 | } | |
144 | ||
145 | SET_MODULE_OWNER(dev); | |
146 | ||
147 | /* | |
148 | * This controller is on an embedded board, so the base address | |
149 | * and interrupt assignments are pre-assigned and unchageable. | |
150 | */ | |
151 | ||
152 | dev->base_addr = ioaddr; | |
153 | dev->irq = OAKNET_INT; | |
154 | ||
155 | /* | |
156 | * Disable all chip interrupts for now and ACK all pending | |
157 | * interrupts. | |
158 | */ | |
159 | ||
160 | ei_obp(0x0, ioaddr + EN0_IMR); | |
161 | ei_obp(0xFF, ioaddr + EN0_ISR); | |
162 | ||
163 | /* Attempt to get the interrupt line */ | |
164 | ||
165 | ret = -EAGAIN; | |
166 | if (request_irq(dev->irq, ei_interrupt, 0, name, dev)) { | |
167 | printk("%s: unable to request interrupt %d.\n", | |
168 | name, dev->irq); | |
169 | goto out_region; | |
170 | } | |
171 | ||
172 | /* Tell the world about what and where we've found. */ | |
173 | ||
174 | printk("%s: %s at", dev->name, name); | |
175 | for (i = 0; i < ETHER_ADDR_LEN; ++i) { | |
176 | dev->dev_addr[i] = bip->bi_enetaddr[i]; | |
177 | printk("%c%.2x", (i ? ':' : ' '), dev->dev_addr[i]); | |
178 | } | |
179 | printk(", found at %#lx, using IRQ %d.\n", dev->base_addr, dev->irq); | |
180 | ||
181 | /* Set up some required driver fields and then we're done. */ | |
182 | ||
183 | ei_status.name = name; | |
184 | ei_status.word16 = FALSE; | |
185 | ei_status.tx_start_page = OAKNET_START_PG; | |
186 | ei_status.rx_start_page = OAKNET_START_PG + TX_PAGES; | |
187 | ei_status.stop_page = OAKNET_STOP_PG; | |
188 | ||
189 | ei_status.reset_8390 = &oaknet_reset_8390; | |
190 | ei_status.block_input = &oaknet_block_input; | |
191 | ei_status.block_output = &oaknet_block_output; | |
192 | ei_status.get_8390_hdr = &oaknet_get_8390_hdr; | |
193 | ||
194 | dev->open = oaknet_open; | |
195 | dev->stop = oaknet_close; | |
196 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
197 | dev->poll_controller = ei_poll; | |
198 | #endif | |
199 | ||
200 | NS8390_init(dev, FALSE); | |
201 | ret = register_netdev(dev); | |
202 | if (ret) | |
203 | goto out_irq; | |
204 | ||
205 | oaknet_devs = dev; | |
206 | return 0; | |
207 | ||
208 | out_irq; | |
209 | free_irq(dev->irq, dev); | |
210 | out_region: | |
211 | release_region(OAKNET_IO_BASE, OAKNET_IO_SIZE); | |
212 | out_dev: | |
213 | free_netdev(dev); | |
214 | out_unmap: | |
215 | iounmap(ioaddr); | |
216 | return ret; | |
217 | } | |
218 | ||
219 | /* | |
220 | * static int oaknet_open() | |
221 | * | |
222 | * Description: | |
223 | * This routine is a modest wrapper around ei_open, the 8390-generic, | |
224 | * driver open routine. This just increments the module usage count | |
225 | * and passes along the status from ei_open. | |
226 | * | |
227 | * Input(s): | |
228 | * *dev - Pointer to the device structure for this driver. | |
229 | * | |
230 | * Output(s): | |
231 | * *dev - Pointer to the device structure for this driver, potentially | |
232 | * modified by ei_open. | |
233 | * | |
234 | * Returns: | |
235 | * 0 if OK, otherwise < 0 on error. | |
236 | * | |
237 | */ | |
238 | static int | |
239 | oaknet_open(struct net_device *dev) | |
240 | { | |
241 | int status = ei_open(dev); | |
242 | return (status); | |
243 | } | |
244 | ||
245 | /* | |
246 | * static int oaknet_close() | |
247 | * | |
248 | * Description: | |
249 | * This routine is a modest wrapper around ei_close, the 8390-generic, | |
250 | * driver close routine. This just decrements the module usage count | |
251 | * and passes along the status from ei_close. | |
252 | * | |
253 | * Input(s): | |
254 | * *dev - Pointer to the device structure for this driver. | |
255 | * | |
256 | * Output(s): | |
257 | * *dev - Pointer to the device structure for this driver, potentially | |
258 | * modified by ei_close. | |
259 | * | |
260 | * Returns: | |
261 | * 0 if OK, otherwise < 0 on error. | |
262 | * | |
263 | */ | |
264 | static int | |
265 | oaknet_close(struct net_device *dev) | |
266 | { | |
267 | int status = ei_close(dev); | |
268 | return (status); | |
269 | } | |
270 | ||
271 | /* | |
272 | * static void oaknet_reset_8390() | |
273 | * | |
274 | * Description: | |
275 | * This routine resets the DP83902 chip. | |
276 | * | |
277 | * Input(s): | |
278 | * *dev - Pointer to the device structure for this driver. | |
279 | * | |
280 | * Output(s): | |
281 | * N/A | |
282 | * | |
283 | * Returns: | |
284 | * N/A | |
285 | * | |
286 | */ | |
287 | static void | |
288 | oaknet_reset_8390(struct net_device *dev) | |
289 | { | |
290 | int base = E8390_BASE; | |
291 | ||
292 | /* | |
293 | * We have no provision of reseting the controller as is done | |
294 | * in other drivers, such as "ne.c". However, the following | |
295 | * seems to work well enough in the TiVo driver. | |
296 | */ | |
297 | ||
298 | printk("Resetting %s...\n", dev->name); | |
299 | ei_obp(E8390_STOP | E8390_NODMA | E8390_PAGE0, base + E8390_CMD); | |
300 | ei_status.txing = 0; | |
301 | ei_status.dmaing = 0; | |
302 | } | |
303 | ||
304 | /* | |
305 | * static void oaknet_get_8390_hdr() | |
306 | * | |
307 | * Description: | |
308 | * This routine grabs the 8390-specific header. It's similar to the | |
309 | * block input routine, but we don't need to be concerned with ring wrap | |
310 | * as the header will be at the start of a page, so we optimize accordingly. | |
311 | * | |
312 | * Input(s): | |
313 | * *dev - Pointer to the device structure for this driver. | |
314 | * *hdr - Pointer to storage for the 8390-specific packet header. | |
315 | * ring_page - ? | |
316 | * | |
317 | * Output(s): | |
318 | * *hdr - Pointer to the 8390-specific packet header for the just- | |
319 | * received frame. | |
320 | * | |
321 | * Returns: | |
322 | * N/A | |
323 | * | |
324 | */ | |
325 | static void | |
326 | oaknet_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, | |
327 | int ring_page) | |
328 | { | |
329 | int base = dev->base_addr; | |
330 | ||
331 | /* | |
332 | * This should NOT happen. If it does, it is the LAST thing you'll | |
333 | * see. | |
334 | */ | |
335 | ||
336 | if (ei_status.dmaing) { | |
337 | oaknet_dma_error(dev, "oaknet_get_8390_hdr"); | |
338 | return; | |
339 | } | |
340 | ||
341 | ei_status.dmaing |= 0x01; | |
342 | outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, base + OAKNET_CMD); | |
343 | outb_p(sizeof(struct e8390_pkt_hdr), base + EN0_RCNTLO); | |
344 | outb_p(0, base + EN0_RCNTHI); | |
345 | outb_p(0, base + EN0_RSARLO); /* On page boundary */ | |
346 | outb_p(ring_page, base + EN0_RSARHI); | |
347 | outb_p(E8390_RREAD + E8390_START, base + OAKNET_CMD); | |
348 | ||
349 | if (ei_status.word16) | |
350 | insw(base + OAKNET_DATA, hdr, | |
351 | sizeof(struct e8390_pkt_hdr) >> 1); | |
352 | else | |
353 | insb(base + OAKNET_DATA, hdr, | |
354 | sizeof(struct e8390_pkt_hdr)); | |
355 | ||
356 | /* Byte-swap the packet byte count */ | |
357 | ||
358 | hdr->count = le16_to_cpu(hdr->count); | |
359 | ||
360 | outb_p(ENISR_RDC, base + EN0_ISR); /* ACK Remote DMA interrupt */ | |
361 | ei_status.dmaing &= ~0x01; | |
362 | } | |
363 | ||
364 | /* | |
365 | * XXX - Document me. | |
366 | */ | |
367 | static void | |
368 | oaknet_block_input(struct net_device *dev, int count, struct sk_buff *skb, | |
369 | int ring_offset) | |
370 | { | |
371 | int base = OAKNET_BASE; | |
372 | char *buf = skb->data; | |
373 | ||
374 | /* | |
375 | * This should NOT happen. If it does, it is the LAST thing you'll | |
376 | * see. | |
377 | */ | |
378 | ||
379 | if (ei_status.dmaing) { | |
380 | oaknet_dma_error(dev, "oaknet_block_input"); | |
381 | return; | |
382 | } | |
383 | ||
384 | #ifdef OAKNET_DISINT | |
385 | save_flags(flags); | |
386 | cli(); | |
387 | #endif | |
388 | ||
389 | ei_status.dmaing |= 0x01; | |
390 | ei_obp(E8390_NODMA + E8390_PAGE0 + E8390_START, base + E8390_CMD); | |
391 | ei_obp(count & 0xff, base + EN0_RCNTLO); | |
392 | ei_obp(count >> 8, base + EN0_RCNTHI); | |
393 | ei_obp(ring_offset & 0xff, base + EN0_RSARLO); | |
394 | ei_obp(ring_offset >> 8, base + EN0_RSARHI); | |
395 | ei_obp(E8390_RREAD + E8390_START, base + E8390_CMD); | |
396 | if (ei_status.word16) { | |
397 | ei_isw(base + E8390_DATA, buf, count >> 1); | |
398 | if (count & 0x01) { | |
399 | buf[count - 1] = ei_ib(base + E8390_DATA); | |
400 | #ifdef OAKNET_HEADCHECK | |
401 | bytes++; | |
402 | #endif | |
403 | } | |
404 | } else { | |
405 | ei_isb(base + E8390_DATA, buf, count); | |
406 | } | |
407 | #ifdef OAKNET_HEADCHECK | |
408 | /* | |
409 | * This was for the ALPHA version only, but enough people have | |
410 | * been encountering problems so it is still here. If you see | |
411 | * this message you either 1) have a slightly incompatible clone | |
412 | * or 2) have noise/speed problems with your bus. | |
413 | */ | |
414 | ||
415 | /* DMA termination address check... */ | |
416 | { | |
417 | int addr, tries = 20; | |
418 | do { | |
419 | /* DON'T check for 'ei_ibp(EN0_ISR) & ENISR_RDC' here | |
420 | -- it's broken for Rx on some cards! */ | |
421 | int high = ei_ibp(base + EN0_RSARHI); | |
422 | int low = ei_ibp(base + EN0_RSARLO); | |
423 | addr = (high << 8) + low; | |
424 | if (((ring_offset + bytes) & 0xff) == low) | |
425 | break; | |
426 | } while (--tries > 0); | |
427 | if (tries <= 0) | |
428 | printk("%s: RX transfer address mismatch," | |
429 | "%#4.4x (expected) vs. %#4.4x (actual).\n", | |
430 | dev->name, ring_offset + bytes, addr); | |
431 | } | |
432 | #endif | |
433 | ei_obp(ENISR_RDC, base + EN0_ISR); /* ACK Remote DMA interrupt */ | |
434 | ei_status.dmaing &= ~0x01; | |
435 | ||
436 | #ifdef OAKNET_DISINT | |
437 | restore_flags(flags); | |
438 | #endif | |
439 | } | |
440 | ||
441 | /* | |
442 | * static void oaknet_block_output() | |
443 | * | |
444 | * Description: | |
445 | * This routine... | |
446 | * | |
447 | * Input(s): | |
448 | * *dev - Pointer to the device structure for this driver. | |
449 | * count - Number of bytes to be transferred. | |
450 | * *buf - | |
451 | * start_page - | |
452 | * | |
453 | * Output(s): | |
454 | * N/A | |
455 | * | |
456 | * Returns: | |
457 | * N/A | |
458 | * | |
459 | */ | |
460 | static void | |
461 | oaknet_block_output(struct net_device *dev, int count, | |
462 | const unsigned char *buf, int start_page) | |
463 | { | |
464 | int base = E8390_BASE; | |
465 | #if 0 | |
466 | int bug; | |
467 | #endif | |
468 | unsigned long start; | |
469 | #ifdef OAKNET_DISINT | |
470 | unsigned long flags; | |
471 | #endif | |
472 | #ifdef OAKNET_HEADCHECK | |
473 | int retries = 0; | |
474 | #endif | |
475 | ||
476 | /* Round the count up for word writes. */ | |
477 | ||
478 | if (ei_status.word16 && (count & 0x1)) | |
479 | count++; | |
480 | ||
481 | /* | |
482 | * This should NOT happen. If it does, it is the LAST thing you'll | |
483 | * see. | |
484 | */ | |
485 | ||
486 | if (ei_status.dmaing) { | |
487 | oaknet_dma_error(dev, "oaknet_block_output"); | |
488 | return; | |
489 | } | |
490 | ||
491 | #ifdef OAKNET_DISINT | |
492 | save_flags(flags); | |
493 | cli(); | |
494 | #endif | |
495 | ||
496 | ei_status.dmaing |= 0x01; | |
497 | ||
498 | /* Make sure we are in page 0. */ | |
499 | ||
500 | ei_obp(E8390_PAGE0 + E8390_START + E8390_NODMA, base + E8390_CMD); | |
501 | ||
502 | #ifdef OAKNET_HEADCHECK | |
503 | retry: | |
504 | #endif | |
505 | ||
506 | #if 0 | |
507 | /* | |
508 | * The 83902 documentation states that the processor needs to | |
509 | * do a "dummy read" before doing the remote write to work | |
510 | * around a chip bug they don't feel like fixing. | |
511 | */ | |
512 | ||
513 | bug = 0; | |
514 | while (1) { | |
515 | unsigned int rdhi; | |
516 | unsigned int rdlo; | |
517 | ||
518 | /* Now the normal output. */ | |
519 | ei_obp(ENISR_RDC, base + EN0_ISR); | |
520 | ei_obp(count & 0xff, base + EN0_RCNTLO); | |
521 | ei_obp(count >> 8, base + EN0_RCNTHI); | |
522 | ei_obp(0x00, base + EN0_RSARLO); | |
523 | ei_obp(start_page, base + EN0_RSARHI); | |
524 | ||
525 | if (bug++) | |
526 | break; | |
527 | ||
528 | /* Perform the dummy read */ | |
529 | rdhi = ei_ibp(base + EN0_CRDAHI); | |
530 | rdlo = ei_ibp(base + EN0_CRDALO); | |
531 | ei_obp(E8390_RREAD + E8390_START, base + E8390_CMD); | |
532 | ||
533 | while (1) { | |
534 | unsigned int nrdhi; | |
535 | unsigned int nrdlo; | |
536 | nrdhi = ei_ibp(base + EN0_CRDAHI); | |
537 | nrdlo = ei_ibp(base + EN0_CRDALO); | |
538 | if ((rdhi != nrdhi) || (rdlo != nrdlo)) | |
539 | break; | |
540 | } | |
541 | } | |
542 | #else | |
543 | #ifdef OAKNET_RWFIX | |
544 | /* | |
545 | * Handle the read-before-write bug the same way as the | |
546 | * Crynwr packet driver -- the Nat'l Semi. method doesn't work. | |
547 | * Actually this doesn't always work either, but if you have | |
548 | * problems with your 83902 this is better than nothing! | |
549 | */ | |
550 | ||
551 | ei_obp(0x42, base + EN0_RCNTLO); | |
552 | ei_obp(0x00, base + EN0_RCNTHI); | |
553 | ei_obp(0x42, base + EN0_RSARLO); | |
554 | ei_obp(0x00, base + EN0_RSARHI); | |
555 | ei_obp(E8390_RREAD + E8390_START, base + E8390_CMD); | |
556 | /* Make certain that the dummy read has occurred. */ | |
557 | udelay(6); | |
558 | #endif | |
559 | ||
560 | ei_obp(ENISR_RDC, base + EN0_ISR); | |
561 | ||
562 | /* Now the normal output. */ | |
563 | ei_obp(count & 0xff, base + EN0_RCNTLO); | |
564 | ei_obp(count >> 8, base + EN0_RCNTHI); | |
565 | ei_obp(0x00, base + EN0_RSARLO); | |
566 | ei_obp(start_page, base + EN0_RSARHI); | |
567 | #endif /* 0/1 */ | |
568 | ||
569 | ei_obp(E8390_RWRITE + E8390_START, base + E8390_CMD); | |
570 | if (ei_status.word16) { | |
571 | ei_osw(E8390_BASE + E8390_DATA, buf, count >> 1); | |
572 | } else { | |
573 | ei_osb(E8390_BASE + E8390_DATA, buf, count); | |
574 | } | |
575 | ||
576 | #ifdef OAKNET_DISINT | |
577 | restore_flags(flags); | |
578 | #endif | |
579 | ||
580 | start = jiffies; | |
581 | ||
582 | #ifdef OAKNET_HEADCHECK | |
583 | /* | |
584 | * This was for the ALPHA version only, but enough people have | |
585 | * been encountering problems so it is still here. | |
586 | */ | |
587 | ||
588 | { | |
589 | /* DMA termination address check... */ | |
590 | int addr, tries = 20; | |
591 | do { | |
592 | int high = ei_ibp(base + EN0_RSARHI); | |
593 | int low = ei_ibp(base + EN0_RSARLO); | |
594 | addr = (high << 8) + low; | |
595 | if ((start_page << 8) + count == addr) | |
596 | break; | |
597 | } while (--tries > 0); | |
598 | ||
599 | if (tries <= 0) { | |
600 | printk("%s: Tx packet transfer address mismatch," | |
601 | "%#4.4x (expected) vs. %#4.4x (actual).\n", | |
602 | dev->name, (start_page << 8) + count, addr); | |
603 | if (retries++ == 0) | |
604 | goto retry; | |
605 | } | |
606 | } | |
607 | #endif | |
608 | ||
609 | while ((ei_ibp(base + EN0_ISR) & ENISR_RDC) == 0) { | |
ff5688ae | 610 | if (time_after(jiffies, start + OAKNET_WAIT)) { |
1da177e4 LT |
611 | printk("%s: timeout waiting for Tx RDC.\n", dev->name); |
612 | oaknet_reset_8390(dev); | |
613 | NS8390_init(dev, TRUE); | |
614 | break; | |
615 | } | |
616 | } | |
617 | ||
618 | ei_obp(ENISR_RDC, base + EN0_ISR); /* Ack intr. */ | |
619 | ei_status.dmaing &= ~0x01; | |
620 | } | |
621 | ||
622 | /* | |
623 | * static void oaknet_dma_error() | |
624 | * | |
625 | * Description: | |
626 | * This routine prints out a last-ditch informative message to the console | |
627 | * indicating that a DMA error occurred. If you see this, it's the last | |
628 | * thing you'll see. | |
629 | * | |
630 | * Input(s): | |
631 | * *dev - Pointer to the device structure for this driver. | |
632 | * *name - Informative text (e.g. function name) indicating where the | |
633 | * DMA error occurred. | |
634 | * | |
635 | * Output(s): | |
636 | * N/A | |
637 | * | |
638 | * Returns: | |
639 | * N/A | |
640 | * | |
641 | */ | |
642 | static void | |
643 | oaknet_dma_error(struct net_device *dev, const char *name) | |
644 | { | |
645 | printk(KERN_EMERG "%s: DMAing conflict in %s." | |
646 | "[DMAstat:%d][irqlock:%d][intr:%ld]\n", | |
647 | dev->name, name, ei_status.dmaing, ei_status.irqlock, | |
648 | dev->interrupt); | |
649 | } | |
650 | ||
651 | /* | |
652 | * Oak Ethernet module unload interface. | |
653 | */ | |
654 | static void __exit oaknet_cleanup_module (void) | |
655 | { | |
656 | /* Convert to loop once driver supports multiple devices. */ | |
657 | unregister_netdev(oaknet_dev); | |
658 | free_irq(oaknet_devs->irq, oaknet_devs); | |
659 | release_region(oaknet_devs->base_addr, OAKNET_IO_SIZE); | |
660 | iounmap(ioaddr); | |
661 | free_netdev(oaknet_devs); | |
662 | } | |
663 | ||
664 | module_init(oaknet_init); | |
665 | module_exit(oaknet_cleanup_module); | |
666 | MODULE_LICENSE("GPL"); |