Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

Linux/drivers/net/ethernet/amd/am79c961a.c

  1 /*
  2  *  linux/drivers/net/ethernet/amd/am79c961a.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 
 34 #define TX_BUFFERS 15
 35 #define RX_BUFFERS 25
 36 
 37 #include "am79c961a.h"
 38 
 39 static irqreturn_t
 40 am79c961_interrupt (int irq, void *dev_id);
 41 
 42 static unsigned int net_debug = NET_DEBUG;
 43 
 44 static const char version[] =
 45         "am79c961 ethernet driver (C) 1995-2001 Russell King v0.04\n";
 46 
 47 /* --------------------------------------------------------------------------- */
 48 
 49 #ifdef __arm__
 50 static void write_rreg(u_long base, u_int reg, u_int val)
 51 {
 52         asm volatile(
 53         "str%?h %1, [%2]        @ NET_RAP\n\t"
 54         "str%?h %0, [%2, #-4]   @ NET_RDP"
 55         :
 56         : "r" (val), "r" (reg), "r" (ISAIO_BASE + 0x0464));
 57 }
 58 
 59 static inline unsigned short read_rreg(u_long base_addr, u_int reg)
 60 {
 61         unsigned short v;
 62         asm volatile(
 63         "str%?h %1, [%2]        @ NET_RAP\n\t"
 64         "ldr%?h %0, [%2, #-4]   @ NET_RDP"
 65         : "=r" (v)
 66         : "r" (reg), "r" (ISAIO_BASE + 0x0464));
 67         return v;
 68 }
 69 
 70 static inline void write_ireg(u_long base, u_int reg, u_int val)
 71 {
 72         asm volatile(
 73         "str%?h %1, [%2]        @ NET_RAP\n\t"
 74         "str%?h %0, [%2, #8]    @ NET_IDP"
 75         :
 76         : "r" (val), "r" (reg), "r" (ISAIO_BASE + 0x0464));
 77 }
 78 
 79 static inline unsigned short read_ireg(u_long base_addr, u_int reg)
 80 {
 81         u_short v;
 82         asm volatile(
 83         "str%?h %1, [%2]        @ NAT_RAP\n\t"
 84         "ldr%?h %0, [%2, #8]    @ NET_IDP\n\t"
 85         : "=r" (v)
 86         : "r" (reg), "r" (ISAIO_BASE + 0x0464));
 87         return v;
 88 }
 89 
 90 #define am_writeword(dev,off,val) __raw_writew(val, ISAMEM_BASE + ((off) << 1))
 91 #define am_readword(dev,off)      __raw_readw(ISAMEM_BASE + ((off) << 1))
 92 
 93 static void
 94 am_writebuffer(struct net_device *dev, u_int offset, unsigned char *buf, unsigned int length)
 95 {
 96         offset = ISAMEM_BASE + (offset << 1);
 97         length = (length + 1) & ~1;
 98         if ((int)buf & 2) {
 99                 asm volatile("str%?h    %2, [%0], #4"
100                  : "=&r" (offset) : "" (offset), "r" (buf[0] | (buf[1] << 8)));
101                 buf += 2;
102                 length -= 2;
103         }
104         while (length > 8) {
105                 register unsigned int tmp asm("r2"), tmp2 asm("r3");
106                 asm volatile(
107                         "ldm%?ia        %0!, {%1, %2}"
108                         : "+r" (buf), "=&r" (tmp), "=&r" (tmp2));
109                 length -= 8;
110                 asm volatile(
111                         "str%?h %1, [%0], #4\n\t"
112                         "mov%?  %1, %1, lsr #16\n\t"
113                         "str%?h %1, [%0], #4\n\t"
114                         "str%?h %2, [%0], #4\n\t"
115                         "mov%?  %2, %2, lsr #16\n\t"
116                         "str%?h %2, [%0], #4"
117                 : "+r" (offset), "=&r" (tmp), "=&r" (tmp2));
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 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                 register unsigned int tmp asm("r2"), tmp2 asm("r3"), tmp3;
144                 asm volatile(
145                         "ldr%?h %2, [%0], #4\n\t"
146                         "ldr%?h %4, [%0], #4\n\t"
147                         "ldr%?h %3, [%0], #4\n\t"
148                         "orr%?  %2, %2, %4, lsl #16\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 am79c961_mc_hash(char *addr, u16 *hash)
200 {
201         int idx, bit;
202         u32 crc;
203 
204         crc = ether_crc_le(ETH_ALEN, addr);
205 
206         idx = crc >> 30;
207         bit = (crc >> 26) & 15;
208 
209         hash[idx] |= 1 << bit;
210 }
211 
212 static unsigned int am79c961_get_rx_mode(struct net_device *dev, u16 *hash)
213 {
214         unsigned int mode = MODE_PORT_10BT;
215 
216         if (dev->flags & IFF_PROMISC) {
217                 mode |= MODE_PROMISC;
218                 memset(hash, 0xff, 4 * sizeof(*hash));
219         } else if (dev->flags & IFF_ALLMULTI) {
220                 memset(hash, 0xff, 4 * sizeof(*hash));
221         } else {
222                 struct netdev_hw_addr *ha;
223 
224                 memset(hash, 0, 4 * sizeof(*hash));
225 
226                 netdev_for_each_mc_addr(ha, dev)
227                         am79c961_mc_hash(ha->addr, hash);
228         }
229 
230         return mode;
231 }
232 
233 static void
234 am79c961_init_for_open(struct net_device *dev)
235 {
236         struct dev_priv *priv = netdev_priv(dev);
237         unsigned long flags;
238         unsigned char *p;
239         u_int hdr_addr, first_free_addr;
240         u16 multi_hash[4], mode = am79c961_get_rx_mode(dev, multi_hash);
241         int i;
242 
243         /*
244          * Stop the chip.
245          */
246         spin_lock_irqsave(&priv->chip_lock, flags);
247         write_rreg (dev->base_addr, CSR0, CSR0_BABL|CSR0_CERR|CSR0_MISS|CSR0_MERR|CSR0_TINT|CSR0_RINT|CSR0_STOP);
248         spin_unlock_irqrestore(&priv->chip_lock, flags);
249 
250         write_ireg (dev->base_addr, 5, 0x00a0); /* Receive address LED */
251         write_ireg (dev->base_addr, 6, 0x0081); /* Collision LED */
252         write_ireg (dev->base_addr, 7, 0x0090); /* XMIT LED */
253         write_ireg (dev->base_addr, 2, 0x0000); /* MODE register selects media */
254 
255         for (i = LADRL; i <= LADRH; i++)
256                 write_rreg (dev->base_addr, i, multi_hash[i - LADRL]);
257 
258         for (i = PADRL, p = dev->dev_addr; i <= PADRH; i++, p += 2)
259                 write_rreg (dev->base_addr, i, p[0] | (p[1] << 8));
260 
261         write_rreg (dev->base_addr, MODE, mode);
262         write_rreg (dev->base_addr, POLLINT, 0);
263         write_rreg (dev->base_addr, SIZERXR, -RX_BUFFERS);
264         write_rreg (dev->base_addr, SIZETXR, -TX_BUFFERS);
265 
266         first_free_addr = RX_BUFFERS * 8 + TX_BUFFERS * 8 + 16;
267         hdr_addr = 0;
268 
269         priv->rxhead = 0;
270         priv->rxtail = 0;
271         priv->rxhdr = hdr_addr;
272 
273         for (i = 0; i < RX_BUFFERS; i++) {
274                 priv->rxbuffer[i] = first_free_addr;
275                 am_writeword (dev, hdr_addr, first_free_addr);
276                 am_writeword (dev, hdr_addr + 2, RMD_OWN);
277                 am_writeword (dev, hdr_addr + 4, (-1600));
278                 am_writeword (dev, hdr_addr + 6, 0);
279                 first_free_addr += 1600;
280                 hdr_addr += 8;
281         }
282         priv->txhead = 0;
283         priv->txtail = 0;
284         priv->txhdr = hdr_addr;
285         for (i = 0; i < TX_BUFFERS; i++) {
286                 priv->txbuffer[i] = first_free_addr;
287                 am_writeword (dev, hdr_addr, first_free_addr);
288                 am_writeword (dev, hdr_addr + 2, TMD_STP|TMD_ENP);
289                 am_writeword (dev, hdr_addr + 4, 0xf000);
290                 am_writeword (dev, hdr_addr + 6, 0);
291                 first_free_addr += 1600;
292                 hdr_addr += 8;
293         }
294 
295         write_rreg (dev->base_addr, BASERXL, priv->rxhdr);
296         write_rreg (dev->base_addr, BASERXH, 0);
297         write_rreg (dev->base_addr, BASETXL, priv->txhdr);
298         write_rreg (dev->base_addr, BASERXH, 0);
299         write_rreg (dev->base_addr, CSR0, CSR0_STOP);
300         write_rreg (dev->base_addr, CSR3, CSR3_IDONM|CSR3_BABLM|CSR3_DXSUFLO);
301         write_rreg (dev->base_addr, CSR4, CSR4_APAD_XMIT|CSR4_MFCOM|CSR4_RCVCCOM|CSR4_TXSTRTM|CSR4_JABM);
302         write_rreg (dev->base_addr, CSR0, CSR0_IENA|CSR0_STRT);
303 }
304 
305 static void am79c961_timer(unsigned long data)
306 {
307         struct net_device *dev = (struct net_device *)data;
308         struct dev_priv *priv = netdev_priv(dev);
309         unsigned int lnkstat, carrier;
310         unsigned long flags;
311 
312         spin_lock_irqsave(&priv->chip_lock, flags);
313         lnkstat = read_ireg(dev->base_addr, ISALED0) & ISALED0_LNKST;
314         spin_unlock_irqrestore(&priv->chip_lock, flags);
315         carrier = netif_carrier_ok(dev);
316 
317         if (lnkstat && !carrier) {
318                 netif_carrier_on(dev);
319                 printk("%s: link up\n", dev->name);
320         } else if (!lnkstat && carrier) {
321                 netif_carrier_off(dev);
322                 printk("%s: link down\n", dev->name);
323         }
324 
325         mod_timer(&priv->timer, jiffies + msecs_to_jiffies(500));
326 }
327 
328 /*
329  * Open/initialize the board.
330  */
331 static int
332 am79c961_open(struct net_device *dev)
333 {
334         struct dev_priv *priv = netdev_priv(dev);
335         int ret;
336 
337         ret = request_irq(dev->irq, am79c961_interrupt, 0, dev->name, dev);
338         if (ret)
339                 return ret;
340 
341         am79c961_init_for_open(dev);
342 
343         netif_carrier_off(dev);
344 
345         priv->timer.expires = jiffies;
346         add_timer(&priv->timer);
347 
348         netif_start_queue(dev);
349 
350         return 0;
351 }
352 
353 /*
354  * The inverse routine to am79c961_open().
355  */
356 static int
357 am79c961_close(struct net_device *dev)
358 {
359         struct dev_priv *priv = netdev_priv(dev);
360         unsigned long flags;
361 
362         del_timer_sync(&priv->timer);
363 
364         netif_stop_queue(dev);
365         netif_carrier_off(dev);
366 
367         spin_lock_irqsave(&priv->chip_lock, flags);
368         write_rreg (dev->base_addr, CSR0, CSR0_STOP);
369         write_rreg (dev->base_addr, CSR3, CSR3_MASKALL);
370         spin_unlock_irqrestore(&priv->chip_lock, flags);
371 
372         free_irq (dev->irq, dev);
373 
374         return 0;
375 }
376 
377 /*
378  * Set or clear promiscuous/multicast mode filter for this adapter.
379  */
380 static void am79c961_setmulticastlist (struct net_device *dev)
381 {
382         struct dev_priv *priv = netdev_priv(dev);
383         unsigned long flags;
384         u16 multi_hash[4], mode = am79c961_get_rx_mode(dev, multi_hash);
385         int i, stopped;
386 
387         spin_lock_irqsave(&priv->chip_lock, flags);
388 
389         stopped = read_rreg(dev->base_addr, CSR0) & CSR0_STOP;
390 
391         if (!stopped) {
392                 /*
393                  * Put the chip into suspend mode
394                  */
395                 write_rreg(dev->base_addr, CTRL1, CTRL1_SPND);
396 
397                 /*
398                  * Spin waiting for chip to report suspend mode
399                  */
400                 while ((read_rreg(dev->base_addr, CTRL1) & CTRL1_SPND) == 0) {
401                         spin_unlock_irqrestore(&priv->chip_lock, flags);
402                         nop();
403                         spin_lock_irqsave(&priv->chip_lock, flags);
404                 }
405         }
406 
407         /*
408          * Update the multicast hash table
409          */
410         for (i = 0; i < ARRAY_SIZE(multi_hash); i++)
411                 write_rreg(dev->base_addr, i + LADRL, multi_hash[i]);
412 
413         /*
414          * Write the mode register
415          */
416         write_rreg(dev->base_addr, MODE, mode);
417 
418         if (!stopped) {
419                 /*
420                  * Put the chip back into running mode
421                  */
422                 write_rreg(dev->base_addr, CTRL1, 0);
423         }
424 
425         spin_unlock_irqrestore(&priv->chip_lock, flags);
426 }
427 
428 static void am79c961_timeout(struct net_device *dev)
429 {
430         printk(KERN_WARNING "%s: transmit timed out, network cable problem?\n",
431                 dev->name);
432 
433         /*
434          * ought to do some setup of the tx side here
435          */
436 
437         netif_wake_queue(dev);
438 }
439 
440 /*
441  * Transmit a packet
442  */
443 static int
444 am79c961_sendpacket(struct sk_buff *skb, struct net_device *dev)
445 {
446         struct dev_priv *priv = netdev_priv(dev);
447         unsigned int hdraddr, bufaddr;
448         unsigned int head;
449         unsigned long flags;
450 
451         head = priv->txhead;
452         hdraddr = priv->txhdr + (head << 3);
453         bufaddr = priv->txbuffer[head];
454         head += 1;
455         if (head >= TX_BUFFERS)
456                 head = 0;
457 
458         am_writebuffer (dev, bufaddr, skb->data, skb->len);
459         am_writeword (dev, hdraddr + 4, -skb->len);
460         am_writeword (dev, hdraddr + 2, TMD_OWN|TMD_STP|TMD_ENP);
461         priv->txhead = head;
462 
463         spin_lock_irqsave(&priv->chip_lock, flags);
464         write_rreg (dev->base_addr, CSR0, CSR0_TDMD|CSR0_IENA);
465         spin_unlock_irqrestore(&priv->chip_lock, flags);
466 
467         /*
468          * If the next packet is owned by the ethernet device,
469          * then the tx ring is full and we can't add another
470          * packet.
471          */
472         if (am_readword(dev, priv->txhdr + (priv->txhead << 3) + 2) & TMD_OWN)
473                 netif_stop_queue(dev);
474 
475         dev_consume_skb_any(skb);
476 
477         return NETDEV_TX_OK;
478 }
479 
480 /*
481  * If we have a good packet(s), get it/them out of the buffers.
482  */
483 static void
484 am79c961_rx(struct net_device *dev, struct dev_priv *priv)
485 {
486         do {
487                 struct sk_buff *skb;
488                 u_int hdraddr;
489                 u_int pktaddr;
490                 u_int status;
491                 int len;
492 
493                 hdraddr = priv->rxhdr + (priv->rxtail << 3);
494                 pktaddr = priv->rxbuffer[priv->rxtail];
495 
496                 status = am_readword (dev, hdraddr + 2);
497                 if (status & RMD_OWN) /* do we own it? */
498                         break;
499 
500                 priv->rxtail ++;
501                 if (priv->rxtail >= RX_BUFFERS)
502                         priv->rxtail = 0;
503 
504                 if ((status & (RMD_ERR|RMD_STP|RMD_ENP)) != (RMD_STP|RMD_ENP)) {
505                         am_writeword (dev, hdraddr + 2, RMD_OWN);
506                         dev->stats.rx_errors++;
507                         if (status & RMD_ERR) {
508                                 if (status & RMD_FRAM)
509                                         dev->stats.rx_frame_errors++;
510                                 if (status & RMD_CRC)
511                                         dev->stats.rx_crc_errors++;
512                         } else if (status & RMD_STP)
513                                 dev->stats.rx_length_errors++;
514                         continue;
515                 }
516 
517                 len = am_readword(dev, hdraddr + 6);
518                 skb = netdev_alloc_skb(dev, len + 2);
519 
520                 if (skb) {
521                         skb_reserve(skb, 2);
522 
523                         am_readbuffer(dev, pktaddr, skb_put(skb, len), len);
524                         am_writeword(dev, hdraddr + 2, RMD_OWN);
525                         skb->protocol = eth_type_trans(skb, dev);
526                         netif_rx(skb);
527                         dev->stats.rx_bytes += len;
528                         dev->stats.rx_packets++;
529                 } else {
530                         am_writeword (dev, hdraddr + 2, RMD_OWN);
531                         dev->stats.rx_dropped++;
532                         break;
533                 }
534         } while (1);
535 }
536 
537 /*
538  * Update stats for the transmitted packet
539  */
540 static void
541 am79c961_tx(struct net_device *dev, struct dev_priv *priv)
542 {
543         do {
544                 short len;
545                 u_int hdraddr;
546                 u_int status;
547 
548                 hdraddr = priv->txhdr + (priv->txtail << 3);
549                 status = am_readword (dev, hdraddr + 2);
550                 if (status & TMD_OWN)
551                         break;
552 
553                 priv->txtail ++;
554                 if (priv->txtail >= TX_BUFFERS)
555                         priv->txtail = 0;
556 
557                 if (status & TMD_ERR) {
558                         u_int status2;
559 
560                         dev->stats.tx_errors++;
561 
562                         status2 = am_readword (dev, hdraddr + 6);
563 
564                         /*
565                          * Clear the error byte
566                          */
567                         am_writeword (dev, hdraddr + 6, 0);
568 
569                         if (status2 & TST_RTRY)
570                                 dev->stats.collisions += 16;
571                         if (status2 & TST_LCOL)
572                                 dev->stats.tx_window_errors++;
573                         if (status2 & TST_LCAR)
574                                 dev->stats.tx_carrier_errors++;
575                         if (status2 & TST_UFLO)
576                                 dev->stats.tx_fifo_errors++;
577                         continue;
578                 }
579                 dev->stats.tx_packets++;
580                 len = am_readword (dev, hdraddr + 4);
581                 dev->stats.tx_bytes += -len;
582         } while (priv->txtail != priv->txhead);
583 
584         netif_wake_queue(dev);
585 }
586 
587 static irqreturn_t
588 am79c961_interrupt(int irq, void *dev_id)
589 {
590         struct net_device *dev = (struct net_device *)dev_id;
591         struct dev_priv *priv = netdev_priv(dev);
592         u_int status, n = 100;
593         int handled = 0;
594 
595         do {
596                 status = read_rreg(dev->base_addr, CSR0);
597                 write_rreg(dev->base_addr, CSR0, status &
598                            (CSR0_IENA|CSR0_TINT|CSR0_RINT|
599                             CSR0_MERR|CSR0_MISS|CSR0_CERR|CSR0_BABL));
600 
601                 if (status & CSR0_RINT) {
602                         handled = 1;
603                         am79c961_rx(dev, priv);
604                 }
605                 if (status & CSR0_TINT) {
606                         handled = 1;
607                         am79c961_tx(dev, priv);
608                 }
609                 if (status & CSR0_MISS) {
610                         handled = 1;
611                         dev->stats.rx_dropped++;
612                 }
613                 if (status & CSR0_CERR) {
614                         handled = 1;
615                         mod_timer(&priv->timer, jiffies);
616                 }
617         } while (--n && status & (CSR0_RINT | CSR0_TINT));
618 
619         return IRQ_RETVAL(handled);
620 }
621 
622 #ifdef CONFIG_NET_POLL_CONTROLLER
623 static void am79c961_poll_controller(struct net_device *dev)
624 {
625         unsigned long flags;
626         local_irq_save(flags);
627         am79c961_interrupt(dev->irq, dev);
628         local_irq_restore(flags);
629 }
630 #endif
631 
632 /*
633  * Initialise the chip.  Note that we always expect
634  * to be entered with interrupts enabled.
635  */
636 static int
637 am79c961_hw_init(struct net_device *dev)
638 {
639         struct dev_priv *priv = netdev_priv(dev);
640 
641         spin_lock_irq(&priv->chip_lock);
642         write_rreg (dev->base_addr, CSR0, CSR0_STOP);
643         write_rreg (dev->base_addr, CSR3, CSR3_MASKALL);
644         spin_unlock_irq(&priv->chip_lock);
645 
646         am79c961_ramtest(dev, 0x66);
647         am79c961_ramtest(dev, 0x99);
648 
649         return 0;
650 }
651 
652 static void __init am79c961_banner(void)
653 {
654         static unsigned version_printed;
655 
656         if (net_debug && version_printed++ == 0)
657                 printk(KERN_INFO "%s", version);
658 }
659 static const struct net_device_ops am79c961_netdev_ops = {
660         .ndo_open               = am79c961_open,
661         .ndo_stop               = am79c961_close,
662         .ndo_start_xmit         = am79c961_sendpacket,
663         .ndo_set_rx_mode        = am79c961_setmulticastlist,
664         .ndo_tx_timeout         = am79c961_timeout,
665         .ndo_validate_addr      = eth_validate_addr,
666         .ndo_change_mtu         = eth_change_mtu,
667         .ndo_set_mac_address    = eth_mac_addr,
668 #ifdef CONFIG_NET_POLL_CONTROLLER
669         .ndo_poll_controller    = am79c961_poll_controller,
670 #endif
671 };
672 
673 static int am79c961_probe(struct platform_device *pdev)
674 {
675         struct resource *res;
676         struct net_device *dev;
677         struct dev_priv *priv;
678         int i, ret;
679 
680         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
681         if (!res)
682                 return -ENODEV;
683 
684         dev = alloc_etherdev(sizeof(struct dev_priv));
685         ret = -ENOMEM;
686         if (!dev)
687                 goto out;
688 
689         SET_NETDEV_DEV(dev, &pdev->dev);
690 
691         priv = netdev_priv(dev);
692 
693         /*
694          * Fixed address and IRQ lines here.
695          * The PNP initialisation should have been
696          * done by the ether bootp loader.
697          */
698         dev->base_addr = res->start;
699         ret = platform_get_irq(pdev, 0);
700 
701         if (ret < 0) {
702                 ret = -ENODEV;
703                 goto nodev;
704         }
705         dev->irq = ret;
706 
707         ret = -ENODEV;
708         if (!request_region(dev->base_addr, 0x18, dev->name))
709                 goto nodev;
710 
711         /*
712          * Reset the device.
713          */
714         inb(dev->base_addr + NET_RESET);
715         udelay(5);
716 
717         /*
718          * Check the manufacturer part of the
719          * ether address.
720          */
721         if (inb(dev->base_addr) != 0x08 ||
722             inb(dev->base_addr + 2) != 0x00 ||
723             inb(dev->base_addr + 4) != 0x2b)
724                 goto release;
725 
726         for (i = 0; i < 6; i++)
727                 dev->dev_addr[i] = inb(dev->base_addr + i * 2) & 0xff;
728 
729         am79c961_banner();
730 
731         spin_lock_init(&priv->chip_lock);
732         init_timer(&priv->timer);
733         priv->timer.data = (unsigned long)dev;
734         priv->timer.function = am79c961_timer;
735 
736         if (am79c961_hw_init(dev))
737                 goto release;
738 
739         dev->netdev_ops = &am79c961_netdev_ops;
740 
741         ret = register_netdev(dev);
742         if (ret == 0) {
743                 printk(KERN_INFO "%s: ether address %pM\n",
744                        dev->name, dev->dev_addr);
745                 return 0;
746         }
747 
748 release:
749         release_region(dev->base_addr, 0x18);
750 nodev:
751         free_netdev(dev);
752 out:
753         return ret;
754 }
755 
756 static struct platform_driver am79c961_driver = {
757         .probe          = am79c961_probe,
758         .driver         = {
759                 .name   = "am79c961",
760         },
761 };
762 
763 static int __init am79c961_init(void)
764 {
765         return platform_driver_register(&am79c961_driver);
766 }
767 
768 __initcall(am79c961_init);
769 

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