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Merge tag 'v3.3.7' into 3.3/master
[zen-stable.git] / drivers / net / ethernet / amd / am79c961a.c
blob7d5ded80d2d7164341646307b3ebf1f6bc0ea562
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 #include <linux/io.h>
31
32 #include <mach/hardware.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 volatile(
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 volatile(
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 volatile(
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 volatile(
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 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) : "0" (offset), "r" (buf[0] | (buf[1] << 8)));
102 buf += 2;
103 length -= 2;
104 }
105 while (length > 8) {
106 register unsigned int tmp asm("r2"), tmp2 asm("r3");
107 asm volatile(
108 "ldm%?ia %0!, {%1, %2}"
109 : "+r" (buf), "=&r" (tmp), "=&r" (tmp2));
110 length -= 8;
111 asm volatile(
112 "str%?h %1, [%0], #4\n\t"
113 "mov%? %1, %1, lsr #16\n\t"
114 "str%?h %1, [%0], #4\n\t"
115 "str%?h %2, [%0], #4\n\t"
116 "mov%? %2, %2, lsr #16\n\t"
117 "str%?h %2, [%0], #4"
118 : "+r" (offset), "=&r" (tmp), "=&r" (tmp2));
119 }
120 while (length > 0) {
121 asm volatile("str%?h %2, [%0], #4"
122 : "=&r" (offset) : "0" (offset), "r" (buf[0] | (buf[1] << 8)));
123 buf += 2;
124 length -= 2;
125 }
126 }
127
128 static void
129 am_readbuffer(struct net_device *dev, u_int offset, unsigned char *buf, unsigned int length)
130 {
131 offset = ISAMEM_BASE + (offset << 1);
132 length = (length + 1) & ~1;
133 if ((int)buf & 2) {
134 unsigned int tmp;
135 asm volatile(
136 "ldr%?h %2, [%0], #4\n\t"
137 "str%?b %2, [%1], #1\n\t"
138 "mov%? %2, %2, lsr #8\n\t"
139 "str%?b %2, [%1], #1"
140 : "=&r" (offset), "=&r" (buf), "=r" (tmp): "0" (offset), "1" (buf));
141 length -= 2;
142 }
143 while (length > 8) {
144 register unsigned int tmp asm("r2"), tmp2 asm("r3"), tmp3;
145 asm volatile(
146 "ldr%?h %2, [%0], #4\n\t"
147 "ldr%?h %4, [%0], #4\n\t"
148 "ldr%?h %3, [%0], #4\n\t"
149 "orr%? %2, %2, %4, lsl #16\n\t"
150 "ldr%?h %4, [%0], #4\n\t"
151 "orr%? %3, %3, %4, lsl #16\n\t"
152 "stm%?ia %1!, {%2, %3}"
153 : "=&r" (offset), "=&r" (buf), "=r" (tmp), "=r" (tmp2), "=r" (tmp3)
154 : "0" (offset), "1" (buf));
155 length -= 8;
156 }
157 while (length > 0) {
158 unsigned int tmp;
159 asm volatile(
160 "ldr%?h %2, [%0], #4\n\t"
161 "str%?b %2, [%1], #1\n\t"
162 "mov%? %2, %2, lsr #8\n\t"
163 "str%?b %2, [%1], #1"
164 : "=&r" (offset), "=&r" (buf), "=r" (tmp) : "0" (offset), "1" (buf));
165 length -= 2;
166 }
167 }
168 #else
169 #error Not compatible
170 #endif
171
172 static int
173 am79c961_ramtest(struct net_device *dev, unsigned int val)
174 {
175 unsigned char *buffer = kmalloc (65536, GFP_KERNEL);
176 int i, error = 0, errorcount = 0;
177
178 if (!buffer)
179 return 0;
180 memset (buffer, val, 65536);
181 am_writebuffer(dev, 0, buffer, 65536);
182 memset (buffer, val ^ 255, 65536);
183 am_readbuffer(dev, 0, buffer, 65536);
184 for (i = 0; i < 65536; i++) {
185 if (buffer[i] != val && !error) {
186 printk ("%s: buffer error (%02X %02X) %05X - ", dev->name, val, buffer[i], i);
187 error = 1;
188 errorcount ++;
189 } else if (error && buffer[i] == val) {
190 printk ("%05X\n", i);
191 error = 0;
192 }
193 }
194 if (error)
195 printk ("10000\n");
196 kfree (buffer);
197 return errorcount;
198 }
199
200 static void am79c961_mc_hash(char *addr, u16 *hash)
201 {
202 int idx, bit;
203 u32 crc;
204
205 crc = ether_crc_le(ETH_ALEN, addr);
206
207 idx = crc >> 30;
208 bit = (crc >> 26) & 15;
209
210 hash[idx] |= 1 << bit;
211 }
212
213 static unsigned int am79c961_get_rx_mode(struct net_device *dev, u16 *hash)
214 {
215 unsigned int mode = MODE_PORT_10BT;
216
217 if (dev->flags & IFF_PROMISC) {
218 mode |= MODE_PROMISC;
219 memset(hash, 0xff, 4 * sizeof(*hash));
220 } else if (dev->flags & IFF_ALLMULTI) {
221 memset(hash, 0xff, 4 * sizeof(*hash));
222 } else {
223 struct netdev_hw_addr *ha;
224
225 memset(hash, 0, 4 * sizeof(*hash));
226
227 netdev_for_each_mc_addr(ha, dev)
228 am79c961_mc_hash(ha->addr, hash);
229 }
230
231 return mode;
232 }
233
234 static void
235 am79c961_init_for_open(struct net_device *dev)
236 {
237 struct dev_priv *priv = netdev_priv(dev);
238 unsigned long flags;
239 unsigned char *p;
240 u_int hdr_addr, first_free_addr;
241 u16 multi_hash[4], mode = am79c961_get_rx_mode(dev, multi_hash);
242 int i;
243
244 /*
245 * Stop the chip.
246 */
247 spin_lock_irqsave(&priv->chip_lock, flags);
248 write_rreg (dev->base_addr, CSR0, CSR0_BABL|CSR0_CERR|CSR0_MISS|CSR0_MERR|CSR0_TINT|CSR0_RINT|CSR0_STOP);
249 spin_unlock_irqrestore(&priv->chip_lock, flags);
250
251 write_ireg (dev->base_addr, 5, 0x00a0); /* Receive address LED */
252 write_ireg (dev->base_addr, 6, 0x0081); /* Collision LED */
253 write_ireg (dev->base_addr, 7, 0x0090); /* XMIT LED */
254 write_ireg (dev->base_addr, 2, 0x0000); /* MODE register selects media */
255
256 for (i = LADRL; i <= LADRH; i++)
257 write_rreg (dev->base_addr, i, multi_hash[i - LADRL]);
258
259 for (i = PADRL, p = dev->dev_addr; i <= PADRH; i++, p += 2)
260 write_rreg (dev->base_addr, i, p[0] | (p[1] << 8));
261
262 write_rreg (dev->base_addr, MODE, mode);
263 write_rreg (dev->base_addr, POLLINT, 0);
264 write_rreg (dev->base_addr, SIZERXR, -RX_BUFFERS);
265 write_rreg (dev->base_addr, SIZETXR, -TX_BUFFERS);
266
267 first_free_addr = RX_BUFFERS * 8 + TX_BUFFERS * 8 + 16;
268 hdr_addr = 0;
269
270 priv->rxhead = 0;
271 priv->rxtail = 0;
272 priv->rxhdr = hdr_addr;
273
274 for (i = 0; i < RX_BUFFERS; i++) {
275 priv->rxbuffer[i] = first_free_addr;
276 am_writeword (dev, hdr_addr, first_free_addr);
277 am_writeword (dev, hdr_addr + 2, RMD_OWN);
278 am_writeword (dev, hdr_addr + 4, (-1600));
279 am_writeword (dev, hdr_addr + 6, 0);
280 first_free_addr += 1600;
281 hdr_addr += 8;
282 }
283 priv->txhead = 0;
284 priv->txtail = 0;
285 priv->txhdr = hdr_addr;
286 for (i = 0; i < TX_BUFFERS; i++) {
287 priv->txbuffer[i] = first_free_addr;
288 am_writeword (dev, hdr_addr, first_free_addr);
289 am_writeword (dev, hdr_addr + 2, TMD_STP|TMD_ENP);
290 am_writeword (dev, hdr_addr + 4, 0xf000);
291 am_writeword (dev, hdr_addr + 6, 0);
292 first_free_addr += 1600;
293 hdr_addr += 8;
294 }
295
296 write_rreg (dev->base_addr, BASERXL, priv->rxhdr);
297 write_rreg (dev->base_addr, BASERXH, 0);
298 write_rreg (dev->base_addr, BASETXL, priv->txhdr);
299 write_rreg (dev->base_addr, BASERXH, 0);
300 write_rreg (dev->base_addr, CSR0, CSR0_STOP);
301 write_rreg (dev->base_addr, CSR3, CSR3_IDONM|CSR3_BABLM|CSR3_DXSUFLO);
302 write_rreg (dev->base_addr, CSR4, CSR4_APAD_XMIT|CSR4_MFCOM|CSR4_RCVCCOM|CSR4_TXSTRTM|CSR4_JABM);
303 write_rreg (dev->base_addr, CSR0, CSR0_IENA|CSR0_STRT);
304 }
305
306 static void am79c961_timer(unsigned long data)
307 {
308 struct net_device *dev = (struct net_device *)data;
309 struct dev_priv *priv = netdev_priv(dev);
310 unsigned int lnkstat, carrier;
311 unsigned long flags;
312
313 spin_lock_irqsave(&priv->chip_lock, flags);
314 lnkstat = read_ireg(dev->base_addr, ISALED0) & ISALED0_LNKST;
315 spin_unlock_irqrestore(&priv->chip_lock, flags);
316 carrier = netif_carrier_ok(dev);
317
318 if (lnkstat && !carrier) {
319 netif_carrier_on(dev);
320 printk("%s: link up\n", dev->name);
321 } else if (!lnkstat && carrier) {
322 netif_carrier_off(dev);
323 printk("%s: link down\n", dev->name);
324 }
325
326 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(500));
327 }
328
329 /*
330 * Open/initialize the board.
331 */
332 static int
333 am79c961_open(struct net_device *dev)
334 {
335 struct dev_priv *priv = netdev_priv(dev);
336 int ret;
337
338 ret = request_irq(dev->irq, am79c961_interrupt, 0, dev->name, dev);
339 if (ret)
340 return ret;
341
342 am79c961_init_for_open(dev);
343
344 netif_carrier_off(dev);
345
346 priv->timer.expires = jiffies;
347 add_timer(&priv->timer);
348
349 netif_start_queue(dev);
350
351 return 0;
352 }
353
354 /*
355 * The inverse routine to am79c961_open().
356 */
357 static int
358 am79c961_close(struct net_device *dev)
359 {
360 struct dev_priv *priv = netdev_priv(dev);
361 unsigned long flags;
362
363 del_timer_sync(&priv->timer);
364
365 netif_stop_queue(dev);
366 netif_carrier_off(dev);
367
368 spin_lock_irqsave(&priv->chip_lock, flags);
369 write_rreg (dev->base_addr, CSR0, CSR0_STOP);
370 write_rreg (dev->base_addr, CSR3, CSR3_MASKALL);
371 spin_unlock_irqrestore(&priv->chip_lock, flags);
372
373 free_irq (dev->irq, dev);
374
375 return 0;
376 }
377
378 /*
379 * Set or clear promiscuous/multicast mode filter for this adapter.
380 */
381 static void am79c961_setmulticastlist (struct net_device *dev)
382 {
383 struct dev_priv *priv = netdev_priv(dev);
384 unsigned long flags;
385 u16 multi_hash[4], mode = am79c961_get_rx_mode(dev, multi_hash);
386 int i, stopped;
387
388 spin_lock_irqsave(&priv->chip_lock, flags);
389
390 stopped = read_rreg(dev->base_addr, CSR0) & CSR0_STOP;
391
392 if (!stopped) {
393 /*
394 * Put the chip into suspend mode
395 */
396 write_rreg(dev->base_addr, CTRL1, CTRL1_SPND);
397
398 /*
399 * Spin waiting for chip to report suspend mode
400 */
401 while ((read_rreg(dev->base_addr, CTRL1) & CTRL1_SPND) == 0) {
402 spin_unlock_irqrestore(&priv->chip_lock, flags);
403 nop();
404 spin_lock_irqsave(&priv->chip_lock, flags);
405 }
406 }
407
408 /*
409 * Update the multicast hash table
410 */
411 for (i = 0; i < ARRAY_SIZE(multi_hash); i++)
412 write_rreg(dev->base_addr, i + LADRL, multi_hash[i]);
413
414 /*
415 * Write the mode register
416 */
417 write_rreg(dev->base_addr, MODE, mode);
418
419 if (!stopped) {
420 /*
421 * Put the chip back into running mode
422 */
423 write_rreg(dev->base_addr, CTRL1, 0);
424 }
425
426 spin_unlock_irqrestore(&priv->chip_lock, flags);
427 }
428
429 static void am79c961_timeout(struct net_device *dev)
430 {
431 printk(KERN_WARNING "%s: transmit timed out, network cable problem?\n",
432 dev->name);
433
434 /*
435 * ought to do some setup of the tx side here
436 */
437
438 netif_wake_queue(dev);
439 }
440
441 /*
442 * Transmit a packet
443 */
444 static int
445 am79c961_sendpacket(struct sk_buff *skb, struct net_device *dev)
446 {
447 struct dev_priv *priv = netdev_priv(dev);
448 unsigned int hdraddr, bufaddr;
449 unsigned int head;
450 unsigned long flags;
451
452 head = priv->txhead;
453 hdraddr = priv->txhdr + (head << 3);
454 bufaddr = priv->txbuffer[head];
455 head += 1;
456 if (head >= TX_BUFFERS)
457 head = 0;
458
459 am_writebuffer (dev, bufaddr, skb->data, skb->len);
460 am_writeword (dev, hdraddr + 4, -skb->len);
461 am_writeword (dev, hdraddr + 2, TMD_OWN|TMD_STP|TMD_ENP);
462 priv->txhead = head;
463
464 spin_lock_irqsave(&priv->chip_lock, flags);
465 write_rreg (dev->base_addr, CSR0, CSR0_TDMD|CSR0_IENA);
466 spin_unlock_irqrestore(&priv->chip_lock, flags);
467
468 /*
469 * If the next packet is owned by the ethernet device,
470 * then the tx ring is full and we can't add another
471 * packet.
472 */
473 if (am_readword(dev, priv->txhdr + (priv->txhead << 3) + 2) & TMD_OWN)
474 netif_stop_queue(dev);
475
476 dev_kfree_skb(skb);
477
478 return NETDEV_TX_OK;
479 }
480
481 /*
482 * If we have a good packet(s), get it/them out of the buffers.
483 */
484 static void
485 am79c961_rx(struct net_device *dev, struct dev_priv *priv)
486 {
487 do {
488 struct sk_buff *skb;
489 u_int hdraddr;
490 u_int pktaddr;
491 u_int status;
492 int len;
493
494 hdraddr = priv->rxhdr + (priv->rxtail << 3);
495 pktaddr = priv->rxbuffer[priv->rxtail];
496
497 status = am_readword (dev, hdraddr + 2);
498 if (status & RMD_OWN) /* do we own it? */
499 break;
500
501 priv->rxtail ++;
502 if (priv->rxtail >= RX_BUFFERS)
503 priv->rxtail = 0;
504
505 if ((status & (RMD_ERR|RMD_STP|RMD_ENP)) != (RMD_STP|RMD_ENP)) {
506 am_writeword (dev, hdraddr + 2, RMD_OWN);
507 dev->stats.rx_errors++;
508 if (status & RMD_ERR) {
509 if (status & RMD_FRAM)
510 dev->stats.rx_frame_errors++;
511 if (status & RMD_CRC)
512 dev->stats.rx_crc_errors++;
513 } else if (status & RMD_STP)
514 dev->stats.rx_length_errors++;
515 continue;
516 }
517
518 len = am_readword(dev, hdraddr + 6);
519 skb = dev_alloc_skb(len + 2);
520
521 if (skb) {
522 skb_reserve(skb, 2);
523
524 am_readbuffer(dev, pktaddr, skb_put(skb, len), len);
525 am_writeword(dev, hdraddr + 2, RMD_OWN);
526 skb->protocol = eth_type_trans(skb, dev);
527 netif_rx(skb);
528 dev->stats.rx_bytes += len;
529 dev->stats.rx_packets++;
530 } else {
531 am_writeword (dev, hdraddr + 2, RMD_OWN);
532 printk (KERN_WARNING "%s: memory squeeze, dropping packet.\n", dev->name);
533 dev->stats.rx_dropped++;
534 break;
535 }
536 } while (1);
537 }
538
539 /*
540 * Update stats for the transmitted packet
541 */
542 static void
543 am79c961_tx(struct net_device *dev, struct dev_priv *priv)
544 {
545 do {
546 short len;
547 u_int hdraddr;
548 u_int status;
549
550 hdraddr = priv->txhdr + (priv->txtail << 3);
551 status = am_readword (dev, hdraddr + 2);
552 if (status & TMD_OWN)
553 break;
554
555 priv->txtail ++;
556 if (priv->txtail >= TX_BUFFERS)
557 priv->txtail = 0;
558
559 if (status & TMD_ERR) {
560 u_int status2;
561
562 dev->stats.tx_errors++;
563
564 status2 = am_readword (dev, hdraddr + 6);
565
566 /*
567 * Clear the error byte
568 */
569 am_writeword (dev, hdraddr + 6, 0);
570
571 if (status2 & TST_RTRY)
572 dev->stats.collisions += 16;
573 if (status2 & TST_LCOL)
574 dev->stats.tx_window_errors++;
575 if (status2 & TST_LCAR)
576 dev->stats.tx_carrier_errors++;
577 if (status2 & TST_UFLO)
578 dev->stats.tx_fifo_errors++;
579 continue;
580 }
581 dev->stats.tx_packets++;
582 len = am_readword (dev, hdraddr + 4);
583 dev->stats.tx_bytes += -len;
584 } while (priv->txtail != priv->txhead);
585
586 netif_wake_queue(dev);
587 }
588
589 static irqreturn_t
590 am79c961_interrupt(int irq, void *dev_id)
591 {
592 struct net_device *dev = (struct net_device *)dev_id;
593 struct dev_priv *priv = netdev_priv(dev);
594 u_int status, n = 100;
595 int handled = 0;
596
597 do {
598 status = read_rreg(dev->base_addr, CSR0);
599 write_rreg(dev->base_addr, CSR0, status &
600 (CSR0_IENA|CSR0_TINT|CSR0_RINT|
601 CSR0_MERR|CSR0_MISS|CSR0_CERR|CSR0_BABL));
602
603 if (status & CSR0_RINT) {
604 handled = 1;
605 am79c961_rx(dev, priv);
606 }
607 if (status & CSR0_TINT) {
608 handled = 1;
609 am79c961_tx(dev, priv);
610 }
611 if (status & CSR0_MISS) {
612 handled = 1;
613 dev->stats.rx_dropped++;
614 }
615 if (status & CSR0_CERR) {
616 handled = 1;
617 mod_timer(&priv->timer, jiffies);
618 }
619 } while (--n && status & (CSR0_RINT | CSR0_TINT));
620
621 return IRQ_RETVAL(handled);
622 }
623
624 #ifdef CONFIG_NET_POLL_CONTROLLER
625 static void am79c961_poll_controller(struct net_device *dev)
626 {
627 unsigned long flags;
628 local_irq_save(flags);
629 am79c961_interrupt(dev->irq, dev);
630 local_irq_restore(flags);
631 }
632 #endif
633
634 /*
635 * Initialise the chip. Note that we always expect
636 * to be entered with interrupts enabled.
637 */
638 static int
639 am79c961_hw_init(struct net_device *dev)
640 {
641 struct dev_priv *priv = netdev_priv(dev);
642
643 spin_lock_irq(&priv->chip_lock);
644 write_rreg (dev->base_addr, CSR0, CSR0_STOP);
645 write_rreg (dev->base_addr, CSR3, CSR3_MASKALL);
646 spin_unlock_irq(&priv->chip_lock);
647
648 am79c961_ramtest(dev, 0x66);
649 am79c961_ramtest(dev, 0x99);
650
651 return 0;
652 }
653
654 static void __init am79c961_banner(void)
655 {
656 static unsigned version_printed;
657
658 if (net_debug && version_printed++ == 0)
659 printk(KERN_INFO "%s", version);
660 }
661 static const struct net_device_ops am79c961_netdev_ops = {
662 .ndo_open = am79c961_open,
663 .ndo_stop = am79c961_close,
664 .ndo_start_xmit = am79c961_sendpacket,
665 .ndo_set_rx_mode = am79c961_setmulticastlist,
666 .ndo_tx_timeout = am79c961_timeout,
667 .ndo_validate_addr = eth_validate_addr,
668 .ndo_change_mtu = eth_change_mtu,
669 .ndo_set_mac_address = eth_mac_addr,
670 #ifdef CONFIG_NET_POLL_CONTROLLER
671 .ndo_poll_controller = am79c961_poll_controller,
672 #endif
673 };
674
675 static int __devinit am79c961_probe(struct platform_device *pdev)
676 {
677 struct resource *res;
678 struct net_device *dev;
679 struct dev_priv *priv;
680 int i, ret;
681
682 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
683 if (!res)
684 return -ENODEV;
685
686 dev = alloc_etherdev(sizeof(struct dev_priv));
687 ret = -ENOMEM;
688 if (!dev)
689 goto out;
690
691 SET_NETDEV_DEV(dev, &pdev->dev);
692
693 priv = netdev_priv(dev);
694
695 /*
696 * Fixed address and IRQ lines here.
697 * The PNP initialisation should have been
698 * done by the ether bootp loader.
699 */
700 dev->base_addr = res->start;
701 ret = platform_get_irq(pdev, 0);
702
703 if (ret < 0) {
704 ret = -ENODEV;
705 goto nodev;
706 }
707 dev->irq = ret;
708
709 ret = -ENODEV;
710 if (!request_region(dev->base_addr, 0x18, dev->name))
711 goto nodev;
712
713 /*
714 * Reset the device.
715 */
716 inb(dev->base_addr + NET_RESET);
717 udelay(5);
718
719 /*
720 * Check the manufacturer part of the
721 * ether address.
722 */
723 if (inb(dev->base_addr) != 0x08 ||
724 inb(dev->base_addr + 2) != 0x00 ||
725 inb(dev->base_addr + 4) != 0x2b)
726 goto release;
727
728 for (i = 0; i < 6; i++)
729 dev->dev_addr[i] = inb(dev->base_addr + i * 2) & 0xff;
730
731 am79c961_banner();
732
733 spin_lock_init(&priv->chip_lock);
734 init_timer(&priv->timer);
735 priv->timer.data = (unsigned long)dev;
736 priv->timer.function = am79c961_timer;
737
738 if (am79c961_hw_init(dev))
739 goto release;
740
741 dev->netdev_ops = &am79c961_netdev_ops;
742
743 ret = register_netdev(dev);
744 if (ret == 0) {
745 printk(KERN_INFO "%s: ether address %pM\n",
746 dev->name, dev->dev_addr);
747 return 0;
748 }
749
750 release:
751 release_region(dev->base_addr, 0x18);
752 nodev:
753 free_netdev(dev);
754 out:
755 return ret;
756 }
757
758 static struct platform_driver am79c961_driver = {
759 .probe = am79c961_probe,
760 .driver = {
761 .name = "am79c961",
762 },
763 };
764
765 static int __init am79c961_init(void)
766 {
767 return platform_driver_register(&am79c961_driver);
768 }
769
770 __initcall(am79c961_init);