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[deliverable/linux.git] / drivers / net / arm / ether3.c
1 /*
2 * linux/drivers/acorn/net/ether3.c
3 *
4 * Copyright (C) 1995-2000 Russell King
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 * SEEQ nq8005 ethernet driver for Acorn/ANT Ether3 card
11 * for Acorn machines
12 *
13 * By Russell King, with some suggestions from borris@ant.co.uk
14 *
15 * Changelog:
16 * 1.04 RMK 29/02/1996 Won't pass packets that are from our ethernet
17 * address up to the higher levels - they're
18 * silently ignored. I/F can now be put into
19 * multicast mode. Receiver routine optimised.
20 * 1.05 RMK 30/02/1996 Now claims interrupt at open when part of
21 * the kernel rather than when a module.
22 * 1.06 RMK 02/03/1996 Various code cleanups
23 * 1.07 RMK 13/10/1996 Optimised interrupt routine and transmit
24 * routines.
25 * 1.08 RMK 14/10/1996 Fixed problem with too many packets,
26 * prevented the kernel message about dropped
27 * packets appearing too many times a second.
28 * Now does not disable all IRQs, only the IRQ
29 * used by this card.
30 * 1.09 RMK 10/11/1996 Only enables TX irq when buffer space is low,
31 * but we still service the TX queue if we get a
32 * RX interrupt.
33 * 1.10 RMK 15/07/1997 Fixed autoprobing of NQ8004.
34 * 1.11 RMK 16/11/1997 Fixed autoprobing of NQ8005A.
35 * 1.12 RMK 31/12/1997 Removed reference to dev_tint for Linux 2.1.
36 * RMK 27/06/1998 Changed asm/delay.h to linux/delay.h.
37 * 1.13 RMK 29/06/1998 Fixed problem with transmission of packets.
38 * Chip seems to have a bug in, whereby if the
39 * packet starts two bytes from the end of the
40 * buffer, it corrupts the receiver chain, and
41 * never updates the transmit status correctly.
42 * 1.14 RMK 07/01/1998 Added initial code for ETHERB addressing.
43 * 1.15 RMK 30/04/1999 More fixes to the transmit routine for buggy
44 * hardware.
45 * 1.16 RMK 10/02/2000 Updated for 2.3.43
46 * 1.17 RMK 13/05/2000 Updated for 2.3.99-pre8
47 */
48
49 #include <linux/module.h>
50 #include <linux/kernel.h>
51 #include <linux/types.h>
52 #include <linux/fcntl.h>
53 #include <linux/interrupt.h>
54 #include <linux/ioport.h>
55 #include <linux/in.h>
56 #include <linux/slab.h>
57 #include <linux/string.h>
58 #include <linux/errno.h>
59 #include <linux/netdevice.h>
60 #include <linux/etherdevice.h>
61 #include <linux/skbuff.h>
62 #include <linux/device.h>
63 #include <linux/init.h>
64 #include <linux/delay.h>
65 #include <linux/bitops.h>
66
67 #include <asm/system.h>
68 #include <asm/ecard.h>
69 #include <asm/io.h>
70
71 static char version[] __devinitdata = "ether3 ethernet driver (c) 1995-2000 R.M.King v1.17\n";
72
73 #include "ether3.h"
74
75 static unsigned int net_debug = NET_DEBUG;
76
77 static void ether3_setmulticastlist(struct net_device *dev);
78 static int ether3_rx(struct net_device *dev, unsigned int maxcnt);
79 static void ether3_tx(struct net_device *dev);
80 static int ether3_open (struct net_device *dev);
81 static int ether3_sendpacket (struct sk_buff *skb, struct net_device *dev);
82 static irqreturn_t ether3_interrupt (int irq, void *dev_id);
83 static int ether3_close (struct net_device *dev);
84 static struct net_device_stats *ether3_getstats (struct net_device *dev);
85 static void ether3_setmulticastlist (struct net_device *dev);
86 static void ether3_timeout(struct net_device *dev);
87
88 #define BUS_16 2
89 #define BUS_8 1
90 #define BUS_UNKNOWN 0
91
92 /* --------------------------------------------------------------------------- */
93
94 typedef enum {
95 buffer_write,
96 buffer_read
97 } buffer_rw_t;
98
99 /*
100 * ether3 read/write. Slow things down a bit...
101 * The SEEQ8005 doesn't like us writing to its registers
102 * too quickly.
103 */
104 static inline void ether3_outb(int v, const void __iomem *r)
105 {
106 writeb(v, r);
107 udelay(1);
108 }
109
110 static inline void ether3_outw(int v, const void __iomem *r)
111 {
112 writew(v, r);
113 udelay(1);
114 }
115 #define ether3_inb(r) ({ unsigned int __v = readb((r)); udelay(1); __v; })
116 #define ether3_inw(r) ({ unsigned int __v = readw((r)); udelay(1); __v; })
117
118 static int
119 ether3_setbuffer(struct net_device *dev, buffer_rw_t read, int start)
120 {
121 int timeout = 1000;
122
123 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
124 ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
125
126 while ((ether3_inw(REG_STATUS) & STAT_FIFOEMPTY) == 0) {
127 if (!timeout--) {
128 printk("%s: setbuffer broken\n", dev->name);
129 priv(dev)->broken = 1;
130 return 1;
131 }
132 udelay(1);
133 }
134
135 if (read == buffer_read) {
136 ether3_outw(start, REG_DMAADDR);
137 ether3_outw(priv(dev)->regs.command | CMD_FIFOREAD, REG_COMMAND);
138 } else {
139 ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
140 ether3_outw(start, REG_DMAADDR);
141 }
142 return 0;
143 }
144
145 /*
146 * write data to the buffer memory
147 */
148 #define ether3_writebuffer(dev,data,length) \
149 writesw(REG_BUFWIN, (data), (length) >> 1)
150
151 #define ether3_writeword(dev,data) \
152 writew((data), REG_BUFWIN)
153
154 #define ether3_writelong(dev,data) { \
155 void __iomem *reg_bufwin = REG_BUFWIN; \
156 writew((data), reg_bufwin); \
157 writew((data) >> 16, reg_bufwin); \
158 }
159
160 /*
161 * read data from the buffer memory
162 */
163 #define ether3_readbuffer(dev,data,length) \
164 readsw(REG_BUFWIN, (data), (length) >> 1)
165
166 #define ether3_readword(dev) \
167 readw(REG_BUFWIN)
168
169 #define ether3_readlong(dev) \
170 readw(REG_BUFWIN) | (readw(REG_BUFWIN) << 16)
171
172 /*
173 * Switch LED off...
174 */
175 static void ether3_ledoff(unsigned long data)
176 {
177 struct net_device *dev = (struct net_device *)data;
178 ether3_outw(priv(dev)->regs.config2 |= CFG2_CTRLO, REG_CONFIG2);
179 }
180
181 /*
182 * switch LED on...
183 */
184 static inline void ether3_ledon(struct net_device *dev)
185 {
186 del_timer(&priv(dev)->timer);
187 priv(dev)->timer.expires = jiffies + HZ / 50; /* leave on for 1/50th second */
188 priv(dev)->timer.data = (unsigned long)dev;
189 priv(dev)->timer.function = ether3_ledoff;
190 add_timer(&priv(dev)->timer);
191 if (priv(dev)->regs.config2 & CFG2_CTRLO)
192 ether3_outw(priv(dev)->regs.config2 &= ~CFG2_CTRLO, REG_CONFIG2);
193 }
194
195 /*
196 * Read the ethernet address string from the on board rom.
197 * This is an ascii string!!!
198 */
199 static int __devinit
200 ether3_addr(char *addr, struct expansion_card *ec)
201 {
202 struct in_chunk_dir cd;
203 char *s;
204
205 if (ecard_readchunk(&cd, ec, 0xf5, 0) && (s = strchr(cd.d.string, '('))) {
206 int i;
207 for (i = 0; i<6; i++) {
208 addr[i] = simple_strtoul(s + 1, &s, 0x10);
209 if (*s != (i==5?')' : ':' ))
210 break;
211 }
212 if (i == 6)
213 return 0;
214 }
215 /* I wonder if we should even let the user continue in this case
216 * - no, it would be better to disable the device
217 */
218 printk(KERN_ERR "ether3: Couldn't read a valid MAC address from card.\n");
219 return -ENODEV;
220 }
221
222 /* --------------------------------------------------------------------------- */
223
224 static int __devinit
225 ether3_ramtest(struct net_device *dev, unsigned char byte)
226 {
227 unsigned char *buffer = kmalloc(RX_END, GFP_KERNEL);
228 int i,ret = 0;
229 int max_errors = 4;
230 int bad = -1;
231
232 if (!buffer)
233 return 1;
234
235 memset(buffer, byte, RX_END);
236 ether3_setbuffer(dev, buffer_write, 0);
237 ether3_writebuffer(dev, buffer, TX_END);
238 ether3_setbuffer(dev, buffer_write, RX_START);
239 ether3_writebuffer(dev, buffer + RX_START, RX_LEN);
240 memset(buffer, byte ^ 0xff, RX_END);
241 ether3_setbuffer(dev, buffer_read, 0);
242 ether3_readbuffer(dev, buffer, TX_END);
243 ether3_setbuffer(dev, buffer_read, RX_START);
244 ether3_readbuffer(dev, buffer + RX_START, RX_LEN);
245
246 for (i = 0; i < RX_END; i++) {
247 if (buffer[i] != byte) {
248 if (max_errors > 0 && bad != buffer[i]) {
249 printk("%s: RAM failed with (%02X instead of %02X) at 0x%04X",
250 dev->name, buffer[i], byte, i);
251 ret = 2;
252 max_errors--;
253 bad = i;
254 }
255 } else {
256 if (bad != -1) {
257 if (bad != i - 1)
258 printk(" - 0x%04X\n", i - 1);
259 printk("\n");
260 bad = -1;
261 }
262 }
263 }
264 if (bad != -1)
265 printk(" - 0xffff\n");
266 kfree(buffer);
267
268 return ret;
269 }
270
271 /* ------------------------------------------------------------------------------- */
272
273 static int __devinit ether3_init_2(struct net_device *dev)
274 {
275 int i;
276
277 priv(dev)->regs.config1 = CFG1_RECVCOMPSTAT0|CFG1_DMABURST8;
278 priv(dev)->regs.config2 = CFG2_CTRLO|CFG2_RECVCRC|CFG2_ERRENCRC;
279 priv(dev)->regs.command = 0;
280
281 /*
282 * Set up our hardware address
283 */
284 ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
285 for (i = 0; i < 6; i++)
286 ether3_outb(dev->dev_addr[i], REG_BUFWIN);
287
288 if (dev->flags & IFF_PROMISC)
289 priv(dev)->regs.config1 |= CFG1_RECVPROMISC;
290 else if (dev->flags & IFF_MULTICAST)
291 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI;
292 else
293 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD;
294
295 /*
296 * There is a problem with the NQ8005 in that it occasionally loses the
297 * last two bytes. To get round this problem, we receive the CRC as
298 * well. That way, if we do lose the last two, then it doesn't matter.
299 */
300 ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
301 ether3_outw((TX_END>>8) - 1, REG_BUFWIN);
302 ether3_outw(priv(dev)->rx_head, REG_RECVPTR);
303 ether3_outw(0, REG_TRANSMITPTR);
304 ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND);
305 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
306 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
307 ether3_outw(priv(dev)->regs.command, REG_COMMAND);
308
309 i = ether3_ramtest(dev, 0x5A);
310 if(i)
311 return i;
312 i = ether3_ramtest(dev, 0x1E);
313 if(i)
314 return i;
315
316 ether3_setbuffer(dev, buffer_write, 0);
317 ether3_writelong(dev, 0);
318 return 0;
319 }
320
321 static void
322 ether3_init_for_open(struct net_device *dev)
323 {
324 int i;
325
326 memset(&priv(dev)->stats, 0, sizeof(struct net_device_stats));
327
328 /* Reset the chip */
329 ether3_outw(CFG2_RESET, REG_CONFIG2);
330 udelay(4);
331
332 priv(dev)->regs.command = 0;
333 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
334 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
335 barrier();
336
337 ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
338 for (i = 0; i < 6; i++)
339 ether3_outb(dev->dev_addr[i], REG_BUFWIN);
340
341 priv(dev)->tx_head = 0;
342 priv(dev)->tx_tail = 0;
343 priv(dev)->regs.config2 |= CFG2_CTRLO;
344 priv(dev)->rx_head = RX_START;
345
346 ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
347 ether3_outw((TX_END>>8) - 1, REG_BUFWIN);
348 ether3_outw(priv(dev)->rx_head, REG_RECVPTR);
349 ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND);
350 ether3_outw(0, REG_TRANSMITPTR);
351 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
352 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
353
354 ether3_setbuffer(dev, buffer_write, 0);
355 ether3_writelong(dev, 0);
356
357 priv(dev)->regs.command = CMD_ENINTRX | CMD_ENINTTX;
358 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND);
359 }
360
361 static inline int
362 ether3_probe_bus_8(struct net_device *dev, int val)
363 {
364 int write_low, write_high, read_low, read_high;
365
366 write_low = val & 255;
367 write_high = val >> 8;
368
369 printk(KERN_DEBUG "ether3_probe: write8 [%02X:%02X]", write_high, write_low);
370
371 ether3_outb(write_low, REG_RECVPTR);
372 ether3_outb(write_high, REG_RECVPTR + 4);
373
374 read_low = ether3_inb(REG_RECVPTR);
375 read_high = ether3_inb(REG_RECVPTR + 4);
376
377 printk(", read8 [%02X:%02X]\n", read_high, read_low);
378
379 return read_low == write_low && read_high == write_high;
380 }
381
382 static inline int
383 ether3_probe_bus_16(struct net_device *dev, int val)
384 {
385 int read_val;
386
387 ether3_outw(val, REG_RECVPTR);
388 read_val = ether3_inw(REG_RECVPTR);
389
390 printk(KERN_DEBUG "ether3_probe: write16 [%04X], read16 [%04X]\n", val, read_val);
391
392 return read_val == val;
393 }
394
395 /*
396 * Open/initialize the board. This is called (in the current kernel)
397 * sometime after booting when the 'ifconfig' program is run.
398 *
399 * This routine should set everything up anew at each open, even
400 * registers that "should" only need to be set once at boot, so that
401 * there is non-reboot way to recover if something goes wrong.
402 */
403 static int
404 ether3_open(struct net_device *dev)
405 {
406 if (!is_valid_ether_addr(dev->dev_addr)) {
407 printk(KERN_WARNING "%s: invalid ethernet MAC address\n",
408 dev->name);
409 return -EINVAL;
410 }
411
412 if (request_irq(dev->irq, ether3_interrupt, 0, "ether3", dev))
413 return -EAGAIN;
414
415 ether3_init_for_open(dev);
416
417 netif_start_queue(dev);
418
419 return 0;
420 }
421
422 /*
423 * The inverse routine to ether3_open().
424 */
425 static int
426 ether3_close(struct net_device *dev)
427 {
428 netif_stop_queue(dev);
429
430 disable_irq(dev->irq);
431
432 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
433 priv(dev)->regs.command = 0;
434 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
435 barrier();
436 ether3_outb(0x80, REG_CONFIG2 + 4);
437 ether3_outw(0, REG_COMMAND);
438
439 free_irq(dev->irq, dev);
440
441 return 0;
442 }
443
444 /*
445 * Get the current statistics. This may be called with the card open or
446 * closed.
447 */
448 static struct net_device_stats *ether3_getstats(struct net_device *dev)
449 {
450 return &priv(dev)->stats;
451 }
452
453 /*
454 * Set or clear promiscuous/multicast mode filter for this adaptor.
455 *
456 * We don't attempt any packet filtering. The card may have a SEEQ 8004
457 * in which does not have the other ethernet address registers present...
458 */
459 static void ether3_setmulticastlist(struct net_device *dev)
460 {
461 priv(dev)->regs.config1 &= ~CFG1_RECVPROMISC;
462
463 if (dev->flags & IFF_PROMISC) {
464 /* promiscuous mode */
465 priv(dev)->regs.config1 |= CFG1_RECVPROMISC;
466 } else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev)) {
467 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI;
468 } else
469 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD;
470
471 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
472 }
473
474 static void ether3_timeout(struct net_device *dev)
475 {
476 unsigned long flags;
477
478 del_timer(&priv(dev)->timer);
479
480 local_irq_save(flags);
481 printk(KERN_ERR "%s: transmit timed out, network cable problem?\n", dev->name);
482 printk(KERN_ERR "%s: state: { status=%04X cfg1=%04X cfg2=%04X }\n", dev->name,
483 ether3_inw(REG_STATUS), ether3_inw(REG_CONFIG1), ether3_inw(REG_CONFIG2));
484 printk(KERN_ERR "%s: { rpr=%04X rea=%04X tpr=%04X }\n", dev->name,
485 ether3_inw(REG_RECVPTR), ether3_inw(REG_RECVEND), ether3_inw(REG_TRANSMITPTR));
486 printk(KERN_ERR "%s: tx head=%X tx tail=%X\n", dev->name,
487 priv(dev)->tx_head, priv(dev)->tx_tail);
488 ether3_setbuffer(dev, buffer_read, priv(dev)->tx_tail);
489 printk(KERN_ERR "%s: packet status = %08X\n", dev->name, ether3_readlong(dev));
490 local_irq_restore(flags);
491
492 priv(dev)->regs.config2 |= CFG2_CTRLO;
493 priv(dev)->stats.tx_errors += 1;
494 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
495 priv(dev)->tx_head = priv(dev)->tx_tail = 0;
496
497 netif_wake_queue(dev);
498 }
499
500 /*
501 * Transmit a packet
502 */
503 static int
504 ether3_sendpacket(struct sk_buff *skb, struct net_device *dev)
505 {
506 unsigned long flags;
507 unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
508 unsigned int ptr, next_ptr;
509
510 if (priv(dev)->broken) {
511 dev_kfree_skb(skb);
512 priv(dev)->stats.tx_dropped ++;
513 netif_start_queue(dev);
514 return NETDEV_TX_OK;
515 }
516
517 length = (length + 1) & ~1;
518 if (length != skb->len) {
519 if (skb_padto(skb, length))
520 goto out;
521 }
522
523 next_ptr = (priv(dev)->tx_head + 1) & 15;
524
525 local_irq_save(flags);
526
527 if (priv(dev)->tx_tail == next_ptr) {
528 local_irq_restore(flags);
529 return NETDEV_TX_BUSY; /* unable to queue */
530 }
531
532 ptr = 0x600 * priv(dev)->tx_head;
533 priv(dev)->tx_head = next_ptr;
534 next_ptr *= 0x600;
535
536 #define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS)
537
538 ether3_setbuffer(dev, buffer_write, next_ptr);
539 ether3_writelong(dev, 0);
540 ether3_setbuffer(dev, buffer_write, ptr);
541 ether3_writelong(dev, 0);
542 ether3_writebuffer(dev, skb->data, length);
543 ether3_writeword(dev, htons(next_ptr));
544 ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16);
545 ether3_setbuffer(dev, buffer_write, ptr);
546 ether3_writeword(dev, htons((ptr + length + 4)));
547 ether3_writeword(dev, TXHDR_FLAGS >> 16);
548 ether3_ledon(dev);
549
550 if (!(ether3_inw(REG_STATUS) & STAT_TXON)) {
551 ether3_outw(ptr, REG_TRANSMITPTR);
552 ether3_outw(priv(dev)->regs.command | CMD_TXON, REG_COMMAND);
553 }
554
555 next_ptr = (priv(dev)->tx_head + 1) & 15;
556 local_irq_restore(flags);
557
558 dev_kfree_skb(skb);
559
560 if (priv(dev)->tx_tail == next_ptr)
561 netif_stop_queue(dev);
562
563 out:
564 return NETDEV_TX_OK;
565 }
566
567 static irqreturn_t
568 ether3_interrupt(int irq, void *dev_id)
569 {
570 struct net_device *dev = (struct net_device *)dev_id;
571 unsigned int status, handled = IRQ_NONE;
572
573 #if NET_DEBUG > 1
574 if(net_debug & DEBUG_INT)
575 printk("eth3irq: %d ", irq);
576 #endif
577
578 status = ether3_inw(REG_STATUS);
579
580 if (status & STAT_INTRX) {
581 ether3_outw(CMD_ACKINTRX | priv(dev)->regs.command, REG_COMMAND);
582 ether3_rx(dev, 12);
583 handled = IRQ_HANDLED;
584 }
585
586 if (status & STAT_INTTX) {
587 ether3_outw(CMD_ACKINTTX | priv(dev)->regs.command, REG_COMMAND);
588 ether3_tx(dev);
589 handled = IRQ_HANDLED;
590 }
591
592 #if NET_DEBUG > 1
593 if(net_debug & DEBUG_INT)
594 printk("done\n");
595 #endif
596 return handled;
597 }
598
599 /*
600 * If we have a good packet(s), get it/them out of the buffers.
601 */
602 static int ether3_rx(struct net_device *dev, unsigned int maxcnt)
603 {
604 unsigned int next_ptr = priv(dev)->rx_head, received = 0;
605
606 ether3_ledon(dev);
607
608 do {
609 unsigned int this_ptr, status;
610 unsigned char addrs[16];
611
612 /*
613 * read the first 16 bytes from the buffer.
614 * This contains the status bytes etc and ethernet addresses,
615 * and we also check the source ethernet address to see if
616 * it originated from us.
617 */
618 {
619 unsigned int temp_ptr;
620 ether3_setbuffer(dev, buffer_read, next_ptr);
621 temp_ptr = ether3_readword(dev);
622 status = ether3_readword(dev);
623 if ((status & (RXSTAT_DONE | RXHDR_CHAINCONTINUE | RXHDR_RECEIVE)) !=
624 (RXSTAT_DONE | RXHDR_CHAINCONTINUE) || !temp_ptr)
625 break;
626
627 this_ptr = next_ptr + 4;
628 next_ptr = ntohs(temp_ptr);
629 }
630 ether3_setbuffer(dev, buffer_read, this_ptr);
631 ether3_readbuffer(dev, addrs+2, 12);
632
633 if (next_ptr < RX_START || next_ptr >= RX_END) {
634 int i;
635 printk("%s: bad next pointer @%04X: ", dev->name, priv(dev)->rx_head);
636 printk("%02X %02X %02X %02X ", next_ptr >> 8, next_ptr & 255, status & 255, status >> 8);
637 for (i = 2; i < 14; i++)
638 printk("%02X ", addrs[i]);
639 printk("\n");
640 next_ptr = priv(dev)->rx_head;
641 break;
642 }
643 /*
644 * ignore our own packets...
645 */
646 if (!(*(unsigned long *)&dev->dev_addr[0] ^ *(unsigned long *)&addrs[2+6]) &&
647 !(*(unsigned short *)&dev->dev_addr[4] ^ *(unsigned short *)&addrs[2+10])) {
648 maxcnt ++; /* compensate for loopedback packet */
649 ether3_outw(next_ptr >> 8, REG_RECVEND);
650 } else
651 if (!(status & (RXSTAT_OVERSIZE|RXSTAT_CRCERROR|RXSTAT_DRIBBLEERROR|RXSTAT_SHORTPACKET))) {
652 unsigned int length = next_ptr - this_ptr;
653 struct sk_buff *skb;
654
655 if (next_ptr <= this_ptr)
656 length += RX_END - RX_START;
657
658 skb = dev_alloc_skb(length + 2);
659 if (skb) {
660 unsigned char *buf;
661
662 skb_reserve(skb, 2);
663 buf = skb_put(skb, length);
664 ether3_readbuffer(dev, buf + 12, length - 12);
665 ether3_outw(next_ptr >> 8, REG_RECVEND);
666 *(unsigned short *)(buf + 0) = *(unsigned short *)(addrs + 2);
667 *(unsigned long *)(buf + 2) = *(unsigned long *)(addrs + 4);
668 *(unsigned long *)(buf + 6) = *(unsigned long *)(addrs + 8);
669 *(unsigned short *)(buf + 10) = *(unsigned short *)(addrs + 12);
670 skb->protocol = eth_type_trans(skb, dev);
671 netif_rx(skb);
672 received ++;
673 } else
674 goto dropping;
675 } else {
676 struct net_device_stats *stats = &priv(dev)->stats;
677 ether3_outw(next_ptr >> 8, REG_RECVEND);
678 if (status & RXSTAT_OVERSIZE) stats->rx_over_errors ++;
679 if (status & RXSTAT_CRCERROR) stats->rx_crc_errors ++;
680 if (status & RXSTAT_DRIBBLEERROR) stats->rx_fifo_errors ++;
681 if (status & RXSTAT_SHORTPACKET) stats->rx_length_errors ++;
682 stats->rx_errors++;
683 }
684 }
685 while (-- maxcnt);
686
687 done:
688 priv(dev)->stats.rx_packets += received;
689 priv(dev)->rx_head = next_ptr;
690 /*
691 * If rx went off line, then that means that the buffer may be full. We
692 * have dropped at least one packet.
693 */
694 if (!(ether3_inw(REG_STATUS) & STAT_RXON)) {
695 priv(dev)->stats.rx_dropped ++;
696 ether3_outw(next_ptr, REG_RECVPTR);
697 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND);
698 }
699
700 return maxcnt;
701
702 dropping:{
703 static unsigned long last_warned;
704
705 ether3_outw(next_ptr >> 8, REG_RECVEND);
706 /*
707 * Don't print this message too many times...
708 */
709 if (time_after(jiffies, last_warned + 10 * HZ)) {
710 last_warned = jiffies;
711 printk("%s: memory squeeze, dropping packet.\n", dev->name);
712 }
713 priv(dev)->stats.rx_dropped ++;
714 goto done;
715 }
716 }
717
718 /*
719 * Update stats for the transmitted packet(s)
720 */
721 static void ether3_tx(struct net_device *dev)
722 {
723 unsigned int tx_tail = priv(dev)->tx_tail;
724 int max_work = 14;
725
726 do {
727 unsigned long status;
728
729 /*
730 * Read the packet header
731 */
732 ether3_setbuffer(dev, buffer_read, tx_tail * 0x600);
733 status = ether3_readlong(dev);
734
735 /*
736 * Check to see if this packet has been transmitted
737 */
738 if ((status & (TXSTAT_DONE | TXHDR_TRANSMIT)) !=
739 (TXSTAT_DONE | TXHDR_TRANSMIT))
740 break;
741
742 /*
743 * Update errors
744 */
745 if (!(status & (TXSTAT_BABBLED | TXSTAT_16COLLISIONS)))
746 priv(dev)->stats.tx_packets++;
747 else {
748 priv(dev)->stats.tx_errors ++;
749 if (status & TXSTAT_16COLLISIONS)
750 priv(dev)->stats.collisions += 16;
751 if (status & TXSTAT_BABBLED)
752 priv(dev)->stats.tx_fifo_errors ++;
753 }
754
755 tx_tail = (tx_tail + 1) & 15;
756 } while (--max_work);
757
758 if (priv(dev)->tx_tail != tx_tail) {
759 priv(dev)->tx_tail = tx_tail;
760 netif_wake_queue(dev);
761 }
762 }
763
764 static void __devinit ether3_banner(void)
765 {
766 static unsigned version_printed = 0;
767
768 if (net_debug && version_printed++ == 0)
769 printk(KERN_INFO "%s", version);
770 }
771
772 static const struct net_device_ops ether3_netdev_ops = {
773 .ndo_open = ether3_open,
774 .ndo_stop = ether3_close,
775 .ndo_start_xmit = ether3_sendpacket,
776 .ndo_get_stats = ether3_getstats,
777 .ndo_set_multicast_list = ether3_setmulticastlist,
778 .ndo_tx_timeout = ether3_timeout,
779 .ndo_validate_addr = eth_validate_addr,
780 .ndo_change_mtu = eth_change_mtu,
781 .ndo_set_mac_address = eth_mac_addr,
782 };
783
784 static int __devinit
785 ether3_probe(struct expansion_card *ec, const struct ecard_id *id)
786 {
787 const struct ether3_data *data = id->data;
788 struct net_device *dev;
789 int bus_type, ret;
790
791 ether3_banner();
792
793 ret = ecard_request_resources(ec);
794 if (ret)
795 goto out;
796
797 dev = alloc_etherdev(sizeof(struct dev_priv));
798 if (!dev) {
799 ret = -ENOMEM;
800 goto release;
801 }
802
803 SET_NETDEV_DEV(dev, &ec->dev);
804
805 priv(dev)->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
806 if (!priv(dev)->base) {
807 ret = -ENOMEM;
808 goto free;
809 }
810
811 ec->irqaddr = priv(dev)->base + data->base_offset;
812 ec->irqmask = 0xf0;
813
814 priv(dev)->seeq = priv(dev)->base + data->base_offset;
815 dev->irq = ec->irq;
816
817 ether3_addr(dev->dev_addr, ec);
818
819 init_timer(&priv(dev)->timer);
820
821 /* Reset card...
822 */
823 ether3_outb(0x80, REG_CONFIG2 + 4);
824 bus_type = BUS_UNKNOWN;
825 udelay(4);
826
827 /* Test using Receive Pointer (16-bit register) to find out
828 * how the ether3 is connected to the bus...
829 */
830 if (ether3_probe_bus_8(dev, 0x100) &&
831 ether3_probe_bus_8(dev, 0x201))
832 bus_type = BUS_8;
833
834 if (bus_type == BUS_UNKNOWN &&
835 ether3_probe_bus_16(dev, 0x101) &&
836 ether3_probe_bus_16(dev, 0x201))
837 bus_type = BUS_16;
838
839 switch (bus_type) {
840 case BUS_UNKNOWN:
841 printk(KERN_ERR "%s: unable to identify bus width\n", dev->name);
842 ret = -ENODEV;
843 goto free;
844
845 case BUS_8:
846 printk(KERN_ERR "%s: %s found, but is an unsupported "
847 "8-bit card\n", dev->name, data->name);
848 ret = -ENODEV;
849 goto free;
850
851 default:
852 break;
853 }
854
855 if (ether3_init_2(dev)) {
856 ret = -ENODEV;
857 goto free;
858 }
859
860 dev->netdev_ops = &ether3_netdev_ops;
861 dev->watchdog_timeo = 5 * HZ / 100;
862
863 ret = register_netdev(dev);
864 if (ret)
865 goto free;
866
867 printk("%s: %s in slot %d, %pM\n",
868 dev->name, data->name, ec->slot_no, dev->dev_addr);
869
870 ecard_set_drvdata(ec, dev);
871 return 0;
872
873 free:
874 free_netdev(dev);
875 release:
876 ecard_release_resources(ec);
877 out:
878 return ret;
879 }
880
881 static void __devexit ether3_remove(struct expansion_card *ec)
882 {
883 struct net_device *dev = ecard_get_drvdata(ec);
884
885 ecard_set_drvdata(ec, NULL);
886
887 unregister_netdev(dev);
888 free_netdev(dev);
889 ecard_release_resources(ec);
890 }
891
892 static struct ether3_data ether3 = {
893 .name = "ether3",
894 .base_offset = 0,
895 };
896
897 static struct ether3_data etherb = {
898 .name = "etherb",
899 .base_offset = 0x800,
900 };
901
902 static const struct ecard_id ether3_ids[] = {
903 { MANU_ANT2, PROD_ANT_ETHER3, &ether3 },
904 { MANU_ANT, PROD_ANT_ETHER3, &ether3 },
905 { MANU_ANT, PROD_ANT_ETHERB, &etherb },
906 { 0xffff, 0xffff }
907 };
908
909 static struct ecard_driver ether3_driver = {
910 .probe = ether3_probe,
911 .remove = __devexit_p(ether3_remove),
912 .id_table = ether3_ids,
913 .drv = {
914 .name = "ether3",
915 },
916 };
917
918 static int __init ether3_init(void)
919 {
920 return ecard_register_driver(&ether3_driver);
921 }
922
923 static void __exit ether3_exit(void)
924 {
925 ecard_remove_driver(&ether3_driver);
926 }
927
928 module_init(ether3_init);
929 module_exit(ether3_exit);
930
931 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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