1 /*
2 * linux/drivers/net/am79c961.c
3 *
4 * by Russell King <rmk@arm.linux.org.uk> 1995-2001.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * Derived from various things including skeleton.c
11 *
12 * This is a special driver for the am79c961A Lance chip used in the
13 * Intel (formally Digital Equipment Corp) EBSA110 platform. Please
14 * note that this can not be built as a module (it doesn't make sense).
15 */
16 #include <linux/kernel.h>
17 #include <linux/types.h>
18 #include <linux/interrupt.h>
19 #include <linux/ioport.h>
20 #include <linux/slab.h>
21 #include <linux/string.h>
22 #include <linux/errno.h>
23 #include <linux/netdevice.h>
24 #include <linux/etherdevice.h>
25 #include <linux/delay.h>
26 #include <linux/init.h>
27 #include <linux/crc32.h>
28 #include <linux/bitops.h>
29 #include <linux/platform_device.h>
30
31 #include <asm/hardware.h>
32 #include <asm/io.h>
33 #include <asm/system.h>
34
35 #define TX_BUFFERS 15
36 #define RX_BUFFERS 25
37
38 #include "am79c961a.h"
39
40 static irqreturn_t
41 am79c961_interrupt (int irq, void *dev_id);
42
43 static unsigned int net_debug = NET_DEBUG;
44
45 static const char version[] =
46 "am79c961 ethernet driver (C) 1995-2001 Russell King v0.04\n";
47
48 /* --------------------------------------------------------------------------- */
49
50 #ifdef __arm__
51 static void write_rreg(u_long base, u_int reg, u_int val)
52 {
53 __asm__(
54 "str%?h %1, [%2] @ NET_RAP\n\t"
55 "str%?h %0, [%2, #-4] @ NET_RDP"
56 :
57 : "r" (val), "r" (reg), "r" (ISAIO_BASE + 0x0464));
58 }
59
60 static inline unsigned short read_rreg(u_long base_addr, u_int reg)
61 {
62 unsigned short v;
63 __asm__(
64 "str%?h %1, [%2] @ NET_RAP\n\t"
65 "ldr%?h %0, [%2, #-4] @ NET_RDP"
66 : "=r" (v)
67 : "r" (reg), "r" (ISAIO_BASE + 0x0464));
68 return v;
69 }
70
71 static inline void write_ireg(u_long base, u_int reg, u_int val)
72 {
73 __asm__(
74 "str%?h %1, [%2] @ NET_RAP\n\t"
75 "str%?h %0, [%2, #8] @ NET_IDP"
76 :
77 : "r" (val), "r" (reg), "r" (ISAIO_BASE + 0x0464));
78 }
79
80 static inline unsigned short read_ireg(u_long base_addr, u_int reg)
81 {
82 u_short v;
83 __asm__(
84 "str%?h %1, [%2] @ NAT_RAP\n\t"
85 "ldr%?h %0, [%2, #8] @ NET_IDP\n\t"
86 : "=r" (v)
87 : "r" (reg), "r" (ISAIO_BASE + 0x0464));
88 return v;
89 }
90
91 #define am_writeword(dev,off,val) __raw_writew(val, ISAMEM_BASE + ((off) << 1))
92 #define am_readword(dev,off) __raw_readw(ISAMEM_BASE + ((off) << 1))
93
94 static inline void
95 am_writebuffer(struct net_device *dev, u_int offset, unsigned char *buf, unsigned int length)
96 {
97 offset = ISAMEM_BASE + (offset << 1);
98 length = (length + 1) & ~1;
99 if ((int)buf & 2) {
100 __asm__ __volatile__("str%?h %2, [%0], #4"
101 : "=&r" (offset) : "" (offset), "r" (buf[0] | (buf[1] << 8)));
102 buf += 2;
103 length -= 2;
104 }
105 while (length > 8) {
106 unsigned int tmp, tmp2;
107 __asm__ __volatile__(
108 "ldm%?ia %1!, {%2, %3}\n\t"
109 "str%?h %2, [%0], #4\n\t"
110 "mov%? %2, %2, lsr #16\n\t"
111 "str%?h %2, [%0], #4\n\t"
112 "str%?h %3, [%0], #4\n\t"
113 "mov%? %3, %3, lsr #16\n\t"
114 "str%?h %3, [%0], #4"
115 : "=&r" (offset), "=&r" (buf), "=r" (tmp), "=r" (tmp2)
116 : "" (offset), "1" (buf));
117 length -= 8;
118 }
119 while (length > 0) {
120 __asm__ __volatile__("str%?h %2, [%0], #4"
121 : "=&r" (offset) : "" (offset), "r" (buf[0] | (buf[1] << 8)));
122 buf += 2;
123 length -= 2;
124 }
125 }
126
127 static inline void
128 am_readbuffer(struct net_device *dev, u_int offset, unsigned char *buf, unsigned int length)
129 {
130 offset = ISAMEM_BASE + (offset << 1);
131 length = (length + 1) & ~1;
132 if ((int)buf & 2) {
133 unsigned int tmp;
134 __asm__ __volatile__(
135 "ldr%?h %2, [%0], #4\n\t"
136 "str%?b %2, [%1], #1\n\t"
137 "mov%? %2, %2, lsr #8\n\t"
138 "str%?b %2, [%1], #1"
139 : "=&r" (offset), "=&r" (buf), "=r" (tmp): "" (offset), "1" (buf));
140 length -= 2;
141 }
142 while (length > 8) {
143 unsigned int tmp, tmp2, tmp3;
144 __asm__ __volatile__(
145 "ldr%?h %2, [%0], #4\n\t"
146 "ldr%?h %3, [%0], #4\n\t"
147 "orr%? %2, %2, %3, lsl #16\n\t"
148 "ldr%?h %3, [%0], #4\n\t"
149 "ldr%?h %4, [%0], #4\n\t"
150 "orr%? %3, %3, %4, lsl #16\n\t"
151 "stm%?ia %1!, {%2, %3}"
152 : "=&r" (offset), "=&r" (buf), "=r" (tmp), "=r" (tmp2), "=r" (tmp3)
153 : "" (offset), "1" (buf));
154 length -= 8;
155 }
156 while (length > 0) {
157 unsigned int tmp;
158 __asm__ __volatile__(
159 "ldr%?h %2, [%0], #4\n\t"
160 "str%?b %2, [%1], #1\n\t"
161 "mov%? %2, %2, lsr #8\n\t"
162 "str%?b %2, [%1], #1"
163 : "=&r" (offset), "=&r" (buf), "=r" (tmp) : "" (offset), "1" (buf));
164 length -= 2;
165 }
166 }
167 #else
168 #error Not compatible
169 #endif
170
171 static int
172 am79c961_ramtest(struct net_device *dev, unsigned int val)
173 {
174 unsigned char *buffer = kmalloc (65536, GFP_KERNEL);
175 int i, error = 0, errorcount = 0;
176
177 if (!buffer)
178 return 0;
179 memset (buffer, val, 65536);
180 am_writebuffer(dev, 0, buffer, 65536);
181 memset (buffer, val ^ 255, 65536);
182 am_readbuffer(dev, 0, buffer, 65536);
183 for (i = 0; i < 65536; i++) {
184 if (buffer[i] != val && !error) {
185 printk ("%s: buffer error (%02X %02X) %05X - ", dev->name, val, buffer[i], i);
186 error = 1;
187 errorcount ++;
188 } else if (error && buffer[i] == val) {
189 printk ("%05X\n", i);
190 error = 0;
191 }
192 }
193 if (error)
194 printk ("10000\n");
195 kfree (buffer);
196 return errorcount;
197 }
198
199 static void
200 am79c961_init_for_open(struct net_device *dev)
201 {
202 struct dev_priv *priv = netdev_priv(dev);
203 unsigned long flags;
204 unsigned char *p;
205 u_int hdr_addr, first_free_addr;
206 int i;
207
208 /*
209 * Stop the chip.
210 */
211 spin_lock_irqsave(priv->chip_lock, flags);
212 write_rreg (dev->base_addr, CSR0, CSR0_BABL|CSR0_CERR|CSR0_MISS|CSR0_MERR|CSR0_TINT|CSR0_RINT|CSR0_STOP);
213 spin_unlock_irqrestore(priv->chip_lock, flags);
214
215 write_ireg (dev->base_addr, 5, 0x00a0); /* Receive address LED */
216 write_ireg (dev->base_addr, 6, 0x0081); /* Collision LED */
217 write_ireg (dev->base_addr, 7, 0x0090); /* XMIT LED */
218 write_ireg (dev->base_addr, 2, 0x0000); /* MODE register selects media */
219
220 for (i = LADRL; i <= LADRH; i++)
221 write_rreg (dev->base_addr, i, 0);
222
223 for (i = PADRL, p = dev->dev_addr; i <= PADRH; i++, p += 2)
224 write_rreg (dev->base_addr, i, p[0] | (p[1] << 8));
225
226 i = MODE_PORT_10BT;
227 if (dev->flags & IFF_PROMISC)
228 i |= MODE_PROMISC;
229
230 write_rreg (dev->base_addr, MODE, i);
231 write_rreg (dev->base_addr, POLLINT, 0);
232 write_rreg (dev->base_addr, SIZERXR, -RX_BUFFERS);
233 write_rreg (dev->base_addr, SIZETXR, -TX_BUFFERS);
234
235 first_free_addr = RX_BUFFERS * 8 + TX_BUFFERS * 8 + 16;
236 hdr_addr = 0;
237
238 priv->rxhead = 0;
239 priv->rxtail = 0;
240 priv->rxhdr = hdr_addr;
241
242 for (i = 0; i < RX_BUFFERS; i++) {
243 priv->rxbuffer[i] = first_free_addr;
244 am_writeword (dev, hdr_addr, first_free_addr);
245 am_writeword (dev, hdr_addr + 2, RMD_OWN);
246 am_writeword (dev, hdr_addr + 4, (-1600));
247 am_writeword (dev, hdr_addr + 6, 0);
248 first_free_addr += 1600;
249 hdr_addr += 8;
250 }
251 priv->txhead = 0;
252 priv->txtail = 0;
253 priv->txhdr = hdr_addr;
254 for (i = 0; i < TX_BUFFERS; i++) {
255 priv->txbuffer[i] = first_free_addr;
256 am_writeword (dev, hdr_addr, first_free_addr);
257 am_writeword (dev, hdr_addr + 2, TMD_STP|TMD_ENP);
258 am_writeword (dev, hdr_addr + 4, 0xf000);
259 am_writeword (dev, hdr_addr + 6, 0);
260 first_free_addr += 1600;
261 hdr_addr += 8;
262 }
263
264 write_rreg (dev->base_addr, BASERXL, priv->rxhdr);
265 write_rreg (dev->base_addr, BASERXH, 0);
266 write_rreg (dev->base_addr, BASETXL, priv->txhdr);
267 write_rreg (dev->base_addr, BASERXH, 0);
268 write_rreg (dev->base_addr, CSR0, CSR0_STOP);
269 write_rreg (dev->base_addr, CSR3, CSR3_IDONM|CSR3_BABLM|CSR3_DXSUFLO);
270 write_rreg (dev->base_addr, CSR4, CSR4_APAD_XMIT|CSR4_MFCOM|CSR4_RCVCCOM|CSR4_TXSTRTM|CSR4_JABM);
271 write_rreg (dev->base_addr, CSR0, CSR0_IENA|CSR0_STRT);
272 }
273
274 static void am79c961_timer(unsigned long data)
275 {
276 struct net_device *dev = (struct net_device *)data;
277 struct dev_priv *priv = netdev_priv(dev);
278 unsigned int lnkstat, carrier;
279
280 lnkstat = read_ireg(dev->base_addr, ISALED0) & ISALED0_LNKST;
281 carrier = netif_carrier_ok(dev);
282
283 if (lnkstat && !carrier) {
284 netif_carrier_on(dev);
285 printk("%s: link up\n", dev->name);
286 } else if (!lnkstat && carrier) {
287 netif_carrier_off(dev);
288 printk("%s: link down\n", dev->name);
289 }
290
291 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(500));
292 }
293
294 /*
295 * Open/initialize the board.
296 */
297 static int
298 am79c961_open(struct net_device *dev)
299 {
300 struct dev_priv *priv = netdev_priv(dev);
301 int ret;
302
303 memset (&priv->stats, 0, sizeof (priv->stats));
304
305 ret = request_irq(dev->irq, am79c961_interrupt, 0, dev->name, dev);
306 if (ret)
307 return ret;
308
309 am79c961_init_for_open(dev);
310
311 netif_carrier_off(dev);
312
313 priv->timer.expires = jiffies;
314 add_timer(&priv->timer);
315
316 netif_start_queue(dev);
317
318 return 0;
319 }
320
321 /*
322 * The inverse routine to am79c961_open().
323 */
324 static int
325 am79c961_close(struct net_device *dev)
326 {
327 struct dev_priv *priv = netdev_priv(dev);
328 unsigned long flags;
329
330 del_timer_sync(&priv->timer);
331
332 netif_stop_queue(dev);
333 netif_carrier_off(dev);
334
335 spin_lock_irqsave(priv->chip_lock, flags);
336 write_rreg (dev->base_addr, CSR0, CSR0_STOP);
337 write_rreg (dev->base_addr, CSR3, CSR3_MASKALL);
338 spin_unlock_irqrestore(priv->chip_lock, flags);
339
340 free_irq (dev->irq, dev);
341
342 return 0;
343 }
344
345 /*
346 * Get the current statistics.
347 */
348 static struct net_device_stats *am79c961_getstats (struct net_device *dev)
349 {
350 struct dev_priv *priv = netdev_priv(dev);
351 return &priv->stats;
352 }
353
354 static void am79c961_mc_hash(struct dev_mc_list *dmi, unsigned short *hash)
355 {
356 if (dmi->dmi_addrlen == ETH_ALEN && dmi->dmi_addr[0] & 0x01) {
357 int idx, bit;
358 u32 crc;
359
360 crc = ether_crc_le(ETH_ALEN, dmi->dmi_addr);
361
362 idx = crc >> 30;
363 bit = (crc >> 26) & 15;
364
365 hash[idx] |= 1 << bit;
366 }
367 }
368
369 /*
370 * Set or clear promiscuous/multicast mode filter for this adapter.
371 */
372 static void am79c961_setmulticastlist (struct net_device *dev)
373 {
374 struct dev_priv *priv = netdev_priv(dev);
375 unsigned long flags;
376 unsigned short multi_hash[4], mode;
377 int i, stopped;
378
379 mode = MODE_PORT_10BT;
380
381 if (dev->flags & IFF_PROMISC) {
382 mode |= MODE_PROMISC;
383 } else if (dev->flags & IFF_ALLMULTI) {
384 memset(multi_hash, 0xff, sizeof(multi_hash));
385 } else {
386 struct dev_mc_list *dmi;
387
388 memset(multi_hash, 0x00, sizeof(multi_hash));
389
390 for (dmi = dev->mc_list; dmi; dmi = dmi->next)
391 am79c961_mc_hash(dmi, multi_hash);
392 }
393
394 spin_lock_irqsave(priv->chip_lock, flags);
395
396 stopped = read_rreg(dev->base_addr, CSR0) & CSR0_STOP;
397
398 if (!stopped) {
399 /*
400 * Put the chip into suspend mode
401 */
402 write_rreg(dev->base_addr, CTRL1, CTRL1_SPND);
403
404 /*
405 * Spin waiting for chip to report suspend mode
406 */
407 while ((read_rreg(dev->base_addr, CTRL1) & CTRL1_SPND) == 0) {
408 spin_unlock_irqrestore(priv->chip_lock, flags);
409 nop();
410 spin_lock_irqsave(priv->chip_lock, flags);
411 }
412 }
413
414 /*
415 * Update the multicast hash table
416 */
417 for (i = 0; i < ARRAY_SIZE(multi_hash); i++)
418 write_rreg(dev->base_addr, i + LADRL, multi_hash[i]);
419
420 /*
421 * Write the mode register
422 */
423 write_rreg(dev->base_addr, MODE, mode);
424
425 if (!stopped) {
426 /*
427 * Put the chip back into running mode
428 */
429 write_rreg(dev->base_addr, CTRL1, 0);
430 }
431
432 spin_unlock_irqrestore(priv->chip_lock, flags);
433 }
434
435 static void am79c961_timeout(struct net_device *dev)
436 {
437 printk(KERN_WARNING "%s: transmit timed out, network cable problem?\n",
438 dev->name);
439
440 /*
441 * ought to do some setup of the tx side here
442 */
443
444 netif_wake_queue(dev);
445 }
446
447 /*
448 * Transmit a packet
449 */
450 static int
451 am79c961_sendpacket(struct sk_buff *skb, struct net_device *dev)
452 {
453 struct dev_priv *priv = netdev_priv(dev);
454 unsigned int hdraddr, bufaddr;
455 unsigned int head;
456 unsigned long flags;
457
458 head = priv->txhead;
459 hdraddr = priv->txhdr + (head << 3);
460 bufaddr = priv->txbuffer[head];
461 head += 1;
462 if (head >= TX_BUFFERS)
463 head = 0;
464
465 am_writebuffer (dev, bufaddr, skb->data, skb->len);
466 am_writeword (dev, hdraddr + 4, -skb->len);
467 am_writeword (dev, hdraddr + 2, TMD_OWN|TMD_STP|TMD_ENP);
468 priv->txhead = head;
469
470 spin_lock_irqsave(priv->chip_lock, flags);
471 write_rreg (dev->base_addr, CSR0, CSR0_TDMD|CSR0_IENA);
472 dev->trans_start = jiffies;
473 spin_unlock_irqrestore(priv->chip_lock, flags);
474
475 /*
476 * If the next packet is owned by the ethernet device,
477 * then the tx ring is full and we can't add another
478 * packet.
479 */
480 if (am_readword(dev, priv->txhdr + (priv->txhead << 3) + 2) & TMD_OWN)
481 netif_stop_queue(dev);
482
483 dev_kfree_skb(skb);
484
485 return 0;
486 }
487
488 /*
489 * If we have a good packet(s), get it/them out of the buffers.
490 */
491 static void
492 am79c961_rx(struct net_device *dev, struct dev_priv *priv)
493 {
494 do {
495 struct sk_buff *skb;
496 u_int hdraddr;
497 u_int pktaddr;
498 u_int status;
499 int len;
500
501 hdraddr = priv->rxhdr + (priv->rxtail << 3);
502 pktaddr = priv->rxbuffer[priv->rxtail];
503
504 status = am_readword (dev, hdraddr + 2);
505 if (status & RMD_OWN) /* do we own it? */
506 break;
507
508 priv->rxtail ++;
509 if (priv->rxtail >= RX_BUFFERS)
510 priv->rxtail = 0;
511
512 if ((status & (RMD_ERR|RMD_STP|RMD_ENP)) != (RMD_STP|RMD_ENP)) {
513 am_writeword (dev, hdraddr + 2, RMD_OWN);
514 priv->stats.rx_errors ++;
515 if (status & RMD_ERR) {
516 if (status & RMD_FRAM)
517 priv->stats.rx_frame_errors ++;
518 if (status & RMD_CRC)
519 priv->stats.rx_crc_errors ++;
520 } else if (status & RMD_STP)
521 priv->stats.rx_length_errors ++;
522 continue;
523 }
524
525 len = am_readword(dev, hdraddr + 6);
526 skb = dev_alloc_skb(len + 2);
527
528 if (skb) {
529 skb_reserve(skb, 2);
530
531 am_readbuffer(dev, pktaddr, skb_put(skb, len), len);
532 am_writeword(dev, hdraddr + 2, RMD_OWN);
533 skb->protocol = eth_type_trans(skb, dev);
534 netif_rx(skb);
535 dev->last_rx = jiffies;
536 priv->stats.rx_bytes += len;
537 priv->stats.rx_packets ++;
538 } else {
539 am_writeword (dev, hdraddr + 2, RMD_OWN);
540 printk (KERN_WARNING "%s: memory squeeze, dropping packet.\n", dev->name);
541 priv->stats.rx_dropped ++;
542 break;
543 }
544 } while (1);
545 }
546
547 /*
548 * Update stats for the transmitted packet
549 */
550 static void
551 am79c961_tx(struct net_device *dev, struct dev_priv *priv)
552 {
553 do {
554 short len;
555 u_int hdraddr;
556 u_int status;
557
558 hdraddr = priv->txhdr + (priv->txtail << 3);
559 status = am_readword (dev, hdraddr + 2);
560 if (status & TMD_OWN)
561 break;
562
563 priv->txtail ++;
564 if (priv->txtail >= TX_BUFFERS)
565 priv->txtail = 0;
566
567 if (status & TMD_ERR) {
568 u_int status2;
569
570 priv->stats.tx_errors ++;
571
572 status2 = am_readword (dev, hdraddr + 6);
573
574 /*
575 * Clear the error byte
576 */
577 am_writeword (dev, hdraddr + 6, 0);
578
579 if (status2 & TST_RTRY)
580 priv->stats.collisions += 16;
581 if (status2 & TST_LCOL)
582 priv->stats.tx_window_errors ++;
583 if (status2 & TST_LCAR)
584 priv->stats.tx_carrier_errors ++;
585 if (status2 & TST_UFLO)
586 priv->stats.tx_fifo_errors ++;
587 continue;
588 }
589 priv->stats.tx_packets ++;
590 len = am_readword (dev, hdraddr + 4);
591 priv->stats.tx_bytes += -len;
592 } while (priv->txtail != priv->txhead);
593
594 netif_wake_queue(dev);
595 }
596
597 static irqreturn_t
598 am79c961_interrupt(int irq, void *dev_id)
599 {
600 struct net_device *dev = (struct net_device *)dev_id;
601 struct dev_priv *priv = netdev_priv(dev);
602 u_int status, n = 100;
603 int handled = 0;
604
605 do {
606 status = read_rreg(dev->base_addr, CSR0);
607 write_rreg(dev->base_addr, CSR0, status &
608 (CSR0_IENA|CSR0_TINT|CSR0_RINT|
609 CSR0_MERR|CSR0_MISS|CSR0_CERR|CSR0_BABL));
610
611 if (status & CSR0_RINT) {
612 handled = 1;
613 am79c961_rx(dev, priv);
614 }
615 if (status & CSR0_TINT) {
616 handled = 1;
617 am79c961_tx(dev, priv);
618 }
619 if (status & CSR0_MISS) {
620 handled = 1;
621 priv->stats.rx_dropped ++;
622 }
623 if (status & CSR0_CERR) {
624 handled = 1;
625 mod_timer(&priv->timer, jiffies);
626 }
627 } while (--n && status & (CSR0_RINT | CSR0_TINT));
628
629 return IRQ_RETVAL(handled);
630 }
631
632 #ifdef CONFIG_NET_POLL_CONTROLLER
633 static void am79c961_poll_controller(struct net_device *dev)
634 {
635 unsigned long flags;
636 local_irq_save(flags);
637 am79c961_interrupt(dev->irq, dev);
638 local_irq_restore(flags);
639 }
640 #endif
641
642 /*
643 * Initialise the chip. Note that we always expect
644 * to be entered with interrupts enabled.
645 */
646 static int
647 am79c961_hw_init(struct net_device *dev)
648 {
649 struct dev_priv *priv = netdev_priv(dev);
650
651 spin_lock_irq(&priv->chip_lock);
652 write_rreg (dev->base_addr, CSR0, CSR0_STOP);
653 write_rreg (dev->base_addr, CSR3, CSR3_MASKALL);
654 spin_unlock_irq(&priv->chip_lock);
655
656 am79c961_ramtest(dev, 0x66);
657 am79c961_ramtest(dev, 0x99);
658
659 return 0;
660 }
661
662 static void __init am79c961_banner(void)
663 {
664 static unsigned version_printed;
665
666 if (net_debug && version_printed++ == 0)
667 printk(KERN_INFO "%s", version);
668 }
669
670 static int __init am79c961_probe(struct platform_device *pdev)
671 {
672 struct resource *res;
673 struct net_device *dev;
674 struct dev_priv *priv;
675 int i, ret;
676
677 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
678 if (!res)
679 return -ENODEV;
680
681 dev = alloc_etherdev(sizeof(struct dev_priv));
682 ret = -ENOMEM;
683 if (!dev)
684 goto out;
685
686 SET_NETDEV_DEV(dev, &pdev->dev);
687
688 priv = netdev_priv(dev);
689
690 /*
691 * Fixed address and IRQ lines here.
692 * The PNP initialisation should have been
693 * done by the ether bootp loader.
694 */
695 dev->base_addr = res->start;
696 dev->irq = platform_get_irq(pdev, 0);
697
698 ret = -ENODEV;
699 if (dev->irq < 0)
700 goto nodev;
701 if (!request_region(dev->base_addr, 0x18, dev->name))
702 goto nodev;
703
704 /*
705 * Reset the device.
706 */
707 inb(dev->base_addr + NET_RESET);
708 udelay(5);
709
710 /*
711 * Check the manufacturer part of the
712 * ether address.
713 */
714 if (inb(dev->base_addr) != 0x08 ||
715 inb(dev->base_addr + 2) != 0x00 ||
716 inb(dev->base_addr + 4) != 0x2b)
717 goto release;
718
719 for (i = 0; i < 6; i++)
720 dev->dev_addr[i] = inb(dev->base_addr + i * 2) & 0xff;
721
722 am79c961_banner();
723
724 spin_lock_init(&priv->chip_lock);
725 init_timer(&priv->timer);
726 priv->timer.data = (unsigned long)dev;
727 priv->timer.function = am79c961_timer;
728
729 if (am79c961_hw_init(dev))
730 goto release;
731
732 dev->open = am79c961_open;
733 dev->stop = am79c961_close;
734 dev->hard_start_xmit = am79c961_sendpacket;
735 dev->get_stats = am79c961_getstats;
736 dev->set_multicast_list = am79c961_setmulticastlist;
737 dev->tx_timeout = am79c961_timeout;
738 #ifdef CONFIG_NET_POLL_CONTROLLER
739 dev->poll_controller = am79c961_poll_controller;
740 #endif
741
742 ret = register_netdev(dev);
743 if (ret == 0) {
744 DECLARE_MAC_BUF(mac);
745
746 printk(KERN_INFO "%s: ether address %s\n",
747 dev->name, print_mac(mac, dev->dev_addr));
748 return 0;
749 }
750
751 release:
752 release_region(dev->base_addr, 0x18);
753 nodev:
754 free_netdev(dev);
755 out:
756 return ret;
757 }
758
759 static struct platform_driver am79c961_driver = {
760 .probe = am79c961_probe,
761 .driver = {
762 .name = "am79c961",
763 },
764 };
765
766 static int __init am79c961_init(void)
767 {
768 return platform_driver_register(&am79c961_driver);
769 }
770
771 __initcall(am79c961_init);
772
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