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Merge branch 'linus' into x86/urgent
[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 void ether3_setmulticastlist (struct net_device *dev);
85 static void ether3_timeout(struct net_device *dev);
86
87 #define BUS_16 2
88 #define BUS_8 1
89 #define BUS_UNKNOWN 0
90
91 /* --------------------------------------------------------------------------- */
92
93 typedef enum {
94 buffer_write,
95 buffer_read
96 } buffer_rw_t;
97
98 /*
99 * ether3 read/write. Slow things down a bit...
100 * The SEEQ8005 doesn't like us writing to its registers
101 * too quickly.
102 */
103 static inline void ether3_outb(int v, const void __iomem *r)
104 {
105 writeb(v, r);
106 udelay(1);
107 }
108
109 static inline void ether3_outw(int v, const void __iomem *r)
110 {
111 writew(v, r);
112 udelay(1);
113 }
114 #define ether3_inb(r) ({ unsigned int __v = readb((r)); udelay(1); __v; })
115 #define ether3_inw(r) ({ unsigned int __v = readw((r)); udelay(1); __v; })
116
117 static int
118 ether3_setbuffer(struct net_device *dev, buffer_rw_t read, int start)
119 {
120 int timeout = 1000;
121
122 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
123 ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
124
125 while ((ether3_inw(REG_STATUS) & STAT_FIFOEMPTY) == 0) {
126 if (!timeout--) {
127 printk("%s: setbuffer broken\n", dev->name);
128 priv(dev)->broken = 1;
129 return 1;
130 }
131 udelay(1);
132 }
133
134 if (read == buffer_read) {
135 ether3_outw(start, REG_DMAADDR);
136 ether3_outw(priv(dev)->regs.command | CMD_FIFOREAD, REG_COMMAND);
137 } else {
138 ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
139 ether3_outw(start, REG_DMAADDR);
140 }
141 return 0;
142 }
143
144 /*
145 * write data to the buffer memory
146 */
147 #define ether3_writebuffer(dev,data,length) \
148 writesw(REG_BUFWIN, (data), (length) >> 1)
149
150 #define ether3_writeword(dev,data) \
151 writew((data), REG_BUFWIN)
152
153 #define ether3_writelong(dev,data) { \
154 void __iomem *reg_bufwin = REG_BUFWIN; \
155 writew((data), reg_bufwin); \
156 writew((data) >> 16, reg_bufwin); \
157 }
158
159 /*
160 * read data from the buffer memory
161 */
162 #define ether3_readbuffer(dev,data,length) \
163 readsw(REG_BUFWIN, (data), (length) >> 1)
164
165 #define ether3_readword(dev) \
166 readw(REG_BUFWIN)
167
168 #define ether3_readlong(dev) \
169 readw(REG_BUFWIN) | (readw(REG_BUFWIN) << 16)
170
171 /*
172 * Switch LED off...
173 */
174 static void ether3_ledoff(unsigned long data)
175 {
176 struct net_device *dev = (struct net_device *)data;
177 ether3_outw(priv(dev)->regs.config2 |= CFG2_CTRLO, REG_CONFIG2);
178 }
179
180 /*
181 * switch LED on...
182 */
183 static inline void ether3_ledon(struct net_device *dev)
184 {
185 del_timer(&priv(dev)->timer);
186 priv(dev)->timer.expires = jiffies + HZ / 50; /* leave on for 1/50th second */
187 priv(dev)->timer.data = (unsigned long)dev;
188 priv(dev)->timer.function = ether3_ledoff;
189 add_timer(&priv(dev)->timer);
190 if (priv(dev)->regs.config2 & CFG2_CTRLO)
191 ether3_outw(priv(dev)->regs.config2 &= ~CFG2_CTRLO, REG_CONFIG2);
192 }
193
194 /*
195 * Read the ethernet address string from the on board rom.
196 * This is an ascii string!!!
197 */
198 static int __devinit
199 ether3_addr(char *addr, struct expansion_card *ec)
200 {
201 struct in_chunk_dir cd;
202 char *s;
203
204 if (ecard_readchunk(&cd, ec, 0xf5, 0) && (s = strchr(cd.d.string, '('))) {
205 int i;
206 for (i = 0; i<6; i++) {
207 addr[i] = simple_strtoul(s + 1, &s, 0x10);
208 if (*s != (i==5?')' : ':' ))
209 break;
210 }
211 if (i == 6)
212 return 0;
213 }
214 /* I wonder if we should even let the user continue in this case
215 * - no, it would be better to disable the device
216 */
217 printk(KERN_ERR "ether3: Couldn't read a valid MAC address from card.\n");
218 return -ENODEV;
219 }
220
221 /* --------------------------------------------------------------------------- */
222
223 static int __devinit
224 ether3_ramtest(struct net_device *dev, unsigned char byte)
225 {
226 unsigned char *buffer = kmalloc(RX_END, GFP_KERNEL);
227 int i,ret = 0;
228 int max_errors = 4;
229 int bad = -1;
230
231 if (!buffer)
232 return 1;
233
234 memset(buffer, byte, RX_END);
235 ether3_setbuffer(dev, buffer_write, 0);
236 ether3_writebuffer(dev, buffer, TX_END);
237 ether3_setbuffer(dev, buffer_write, RX_START);
238 ether3_writebuffer(dev, buffer + RX_START, RX_LEN);
239 memset(buffer, byte ^ 0xff, RX_END);
240 ether3_setbuffer(dev, buffer_read, 0);
241 ether3_readbuffer(dev, buffer, TX_END);
242 ether3_setbuffer(dev, buffer_read, RX_START);
243 ether3_readbuffer(dev, buffer + RX_START, RX_LEN);
244
245 for (i = 0; i < RX_END; i++) {
246 if (buffer[i] != byte) {
247 if (max_errors > 0 && bad != buffer[i]) {
248 printk("%s: RAM failed with (%02X instead of %02X) at 0x%04X",
249 dev->name, buffer[i], byte, i);
250 ret = 2;
251 max_errors--;
252 bad = i;
253 }
254 } else {
255 if (bad != -1) {
256 if (bad != i - 1)
257 printk(" - 0x%04X\n", i - 1);
258 printk("\n");
259 bad = -1;
260 }
261 }
262 }
263 if (bad != -1)
264 printk(" - 0xffff\n");
265 kfree(buffer);
266
267 return ret;
268 }
269
270 /* ------------------------------------------------------------------------------- */
271
272 static int __devinit ether3_init_2(struct net_device *dev)
273 {
274 int i;
275
276 priv(dev)->regs.config1 = CFG1_RECVCOMPSTAT0|CFG1_DMABURST8;
277 priv(dev)->regs.config2 = CFG2_CTRLO|CFG2_RECVCRC|CFG2_ERRENCRC;
278 priv(dev)->regs.command = 0;
279
280 /*
281 * Set up our hardware address
282 */
283 ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
284 for (i = 0; i < 6; i++)
285 ether3_outb(dev->dev_addr[i], REG_BUFWIN);
286
287 if (dev->flags & IFF_PROMISC)
288 priv(dev)->regs.config1 |= CFG1_RECVPROMISC;
289 else if (dev->flags & IFF_MULTICAST)
290 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI;
291 else
292 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD;
293
294 /*
295 * There is a problem with the NQ8005 in that it occasionally loses the
296 * last two bytes. To get round this problem, we receive the CRC as
297 * well. That way, if we do lose the last two, then it doesn't matter.
298 */
299 ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
300 ether3_outw((TX_END>>8) - 1, REG_BUFWIN);
301 ether3_outw(priv(dev)->rx_head, REG_RECVPTR);
302 ether3_outw(0, REG_TRANSMITPTR);
303 ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND);
304 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
305 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
306 ether3_outw(priv(dev)->regs.command, REG_COMMAND);
307
308 i = ether3_ramtest(dev, 0x5A);
309 if(i)
310 return i;
311 i = ether3_ramtest(dev, 0x1E);
312 if(i)
313 return i;
314
315 ether3_setbuffer(dev, buffer_write, 0);
316 ether3_writelong(dev, 0);
317 return 0;
318 }
319
320 static void
321 ether3_init_for_open(struct net_device *dev)
322 {
323 int i;
324
325 /* Reset the chip */
326 ether3_outw(CFG2_RESET, REG_CONFIG2);
327 udelay(4);
328
329 priv(dev)->regs.command = 0;
330 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
331 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
332 barrier();
333
334 ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
335 for (i = 0; i < 6; i++)
336 ether3_outb(dev->dev_addr[i], REG_BUFWIN);
337
338 priv(dev)->tx_head = 0;
339 priv(dev)->tx_tail = 0;
340 priv(dev)->regs.config2 |= CFG2_CTRLO;
341 priv(dev)->rx_head = RX_START;
342
343 ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
344 ether3_outw((TX_END>>8) - 1, REG_BUFWIN);
345 ether3_outw(priv(dev)->rx_head, REG_RECVPTR);
346 ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND);
347 ether3_outw(0, REG_TRANSMITPTR);
348 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
349 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
350
351 ether3_setbuffer(dev, buffer_write, 0);
352 ether3_writelong(dev, 0);
353
354 priv(dev)->regs.command = CMD_ENINTRX | CMD_ENINTTX;
355 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND);
356 }
357
358 static inline int
359 ether3_probe_bus_8(struct net_device *dev, int val)
360 {
361 int write_low, write_high, read_low, read_high;
362
363 write_low = val & 255;
364 write_high = val >> 8;
365
366 printk(KERN_DEBUG "ether3_probe: write8 [%02X:%02X]", write_high, write_low);
367
368 ether3_outb(write_low, REG_RECVPTR);
369 ether3_outb(write_high, REG_RECVPTR + 4);
370
371 read_low = ether3_inb(REG_RECVPTR);
372 read_high = ether3_inb(REG_RECVPTR + 4);
373
374 printk(", read8 [%02X:%02X]\n", read_high, read_low);
375
376 return read_low == write_low && read_high == write_high;
377 }
378
379 static inline int
380 ether3_probe_bus_16(struct net_device *dev, int val)
381 {
382 int read_val;
383
384 ether3_outw(val, REG_RECVPTR);
385 read_val = ether3_inw(REG_RECVPTR);
386
387 printk(KERN_DEBUG "ether3_probe: write16 [%04X], read16 [%04X]\n", val, read_val);
388
389 return read_val == val;
390 }
391
392 /*
393 * Open/initialize the board. This is called (in the current kernel)
394 * sometime after booting when the 'ifconfig' program is run.
395 *
396 * This routine should set everything up anew at each open, even
397 * registers that "should" only need to be set once at boot, so that
398 * there is non-reboot way to recover if something goes wrong.
399 */
400 static int
401 ether3_open(struct net_device *dev)
402 {
403 if (!is_valid_ether_addr(dev->dev_addr)) {
404 printk(KERN_WARNING "%s: invalid ethernet MAC address\n",
405 dev->name);
406 return -EINVAL;
407 }
408
409 if (request_irq(dev->irq, ether3_interrupt, 0, "ether3", dev))
410 return -EAGAIN;
411
412 ether3_init_for_open(dev);
413
414 netif_start_queue(dev);
415
416 return 0;
417 }
418
419 /*
420 * The inverse routine to ether3_open().
421 */
422 static int
423 ether3_close(struct net_device *dev)
424 {
425 netif_stop_queue(dev);
426
427 disable_irq(dev->irq);
428
429 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
430 priv(dev)->regs.command = 0;
431 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
432 barrier();
433 ether3_outb(0x80, REG_CONFIG2 + 4);
434 ether3_outw(0, REG_COMMAND);
435
436 free_irq(dev->irq, dev);
437
438 return 0;
439 }
440
441 /*
442 * Set or clear promiscuous/multicast mode filter for this adaptor.
443 *
444 * We don't attempt any packet filtering. The card may have a SEEQ 8004
445 * in which does not have the other ethernet address registers present...
446 */
447 static void ether3_setmulticastlist(struct net_device *dev)
448 {
449 priv(dev)->regs.config1 &= ~CFG1_RECVPROMISC;
450
451 if (dev->flags & IFF_PROMISC) {
452 /* promiscuous mode */
453 priv(dev)->regs.config1 |= CFG1_RECVPROMISC;
454 } else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev)) {
455 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI;
456 } else
457 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD;
458
459 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
460 }
461
462 static void ether3_timeout(struct net_device *dev)
463 {
464 unsigned long flags;
465
466 del_timer(&priv(dev)->timer);
467
468 local_irq_save(flags);
469 printk(KERN_ERR "%s: transmit timed out, network cable problem?\n", dev->name);
470 printk(KERN_ERR "%s: state: { status=%04X cfg1=%04X cfg2=%04X }\n", dev->name,
471 ether3_inw(REG_STATUS), ether3_inw(REG_CONFIG1), ether3_inw(REG_CONFIG2));
472 printk(KERN_ERR "%s: { rpr=%04X rea=%04X tpr=%04X }\n", dev->name,
473 ether3_inw(REG_RECVPTR), ether3_inw(REG_RECVEND), ether3_inw(REG_TRANSMITPTR));
474 printk(KERN_ERR "%s: tx head=%X tx tail=%X\n", dev->name,
475 priv(dev)->tx_head, priv(dev)->tx_tail);
476 ether3_setbuffer(dev, buffer_read, priv(dev)->tx_tail);
477 printk(KERN_ERR "%s: packet status = %08X\n", dev->name, ether3_readlong(dev));
478 local_irq_restore(flags);
479
480 priv(dev)->regs.config2 |= CFG2_CTRLO;
481 dev->stats.tx_errors += 1;
482 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
483 priv(dev)->tx_head = priv(dev)->tx_tail = 0;
484
485 netif_wake_queue(dev);
486 }
487
488 /*
489 * Transmit a packet
490 */
491 static int
492 ether3_sendpacket(struct sk_buff *skb, struct net_device *dev)
493 {
494 unsigned long flags;
495 unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
496 unsigned int ptr, next_ptr;
497
498 if (priv(dev)->broken) {
499 dev_kfree_skb(skb);
500 dev->stats.tx_dropped++;
501 netif_start_queue(dev);
502 return NETDEV_TX_OK;
503 }
504
505 length = (length + 1) & ~1;
506 if (length != skb->len) {
507 if (skb_padto(skb, length))
508 goto out;
509 }
510
511 next_ptr = (priv(dev)->tx_head + 1) & 15;
512
513 local_irq_save(flags);
514
515 if (priv(dev)->tx_tail == next_ptr) {
516 local_irq_restore(flags);
517 return NETDEV_TX_BUSY; /* unable to queue */
518 }
519
520 ptr = 0x600 * priv(dev)->tx_head;
521 priv(dev)->tx_head = next_ptr;
522 next_ptr *= 0x600;
523
524 #define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS)
525
526 ether3_setbuffer(dev, buffer_write, next_ptr);
527 ether3_writelong(dev, 0);
528 ether3_setbuffer(dev, buffer_write, ptr);
529 ether3_writelong(dev, 0);
530 ether3_writebuffer(dev, skb->data, length);
531 ether3_writeword(dev, htons(next_ptr));
532 ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16);
533 ether3_setbuffer(dev, buffer_write, ptr);
534 ether3_writeword(dev, htons((ptr + length + 4)));
535 ether3_writeword(dev, TXHDR_FLAGS >> 16);
536 ether3_ledon(dev);
537
538 if (!(ether3_inw(REG_STATUS) & STAT_TXON)) {
539 ether3_outw(ptr, REG_TRANSMITPTR);
540 ether3_outw(priv(dev)->regs.command | CMD_TXON, REG_COMMAND);
541 }
542
543 next_ptr = (priv(dev)->tx_head + 1) & 15;
544 local_irq_restore(flags);
545
546 dev_kfree_skb(skb);
547
548 if (priv(dev)->tx_tail == next_ptr)
549 netif_stop_queue(dev);
550
551 out:
552 return NETDEV_TX_OK;
553 }
554
555 static irqreturn_t
556 ether3_interrupt(int irq, void *dev_id)
557 {
558 struct net_device *dev = (struct net_device *)dev_id;
559 unsigned int status, handled = IRQ_NONE;
560
561 #if NET_DEBUG > 1
562 if(net_debug & DEBUG_INT)
563 printk("eth3irq: %d ", irq);
564 #endif
565
566 status = ether3_inw(REG_STATUS);
567
568 if (status & STAT_INTRX) {
569 ether3_outw(CMD_ACKINTRX | priv(dev)->regs.command, REG_COMMAND);
570 ether3_rx(dev, 12);
571 handled = IRQ_HANDLED;
572 }
573
574 if (status & STAT_INTTX) {
575 ether3_outw(CMD_ACKINTTX | priv(dev)->regs.command, REG_COMMAND);
576 ether3_tx(dev);
577 handled = IRQ_HANDLED;
578 }
579
580 #if NET_DEBUG > 1
581 if(net_debug & DEBUG_INT)
582 printk("done\n");
583 #endif
584 return handled;
585 }
586
587 /*
588 * If we have a good packet(s), get it/them out of the buffers.
589 */
590 static int ether3_rx(struct net_device *dev, unsigned int maxcnt)
591 {
592 unsigned int next_ptr = priv(dev)->rx_head, received = 0;
593
594 ether3_ledon(dev);
595
596 do {
597 unsigned int this_ptr, status;
598 unsigned char addrs[16];
599
600 /*
601 * read the first 16 bytes from the buffer.
602 * This contains the status bytes etc and ethernet addresses,
603 * and we also check the source ethernet address to see if
604 * it originated from us.
605 */
606 {
607 unsigned int temp_ptr;
608 ether3_setbuffer(dev, buffer_read, next_ptr);
609 temp_ptr = ether3_readword(dev);
610 status = ether3_readword(dev);
611 if ((status & (RXSTAT_DONE | RXHDR_CHAINCONTINUE | RXHDR_RECEIVE)) !=
612 (RXSTAT_DONE | RXHDR_CHAINCONTINUE) || !temp_ptr)
613 break;
614
615 this_ptr = next_ptr + 4;
616 next_ptr = ntohs(temp_ptr);
617 }
618 ether3_setbuffer(dev, buffer_read, this_ptr);
619 ether3_readbuffer(dev, addrs+2, 12);
620
621 if (next_ptr < RX_START || next_ptr >= RX_END) {
622 int i;
623 printk("%s: bad next pointer @%04X: ", dev->name, priv(dev)->rx_head);
624 printk("%02X %02X %02X %02X ", next_ptr >> 8, next_ptr & 255, status & 255, status >> 8);
625 for (i = 2; i < 14; i++)
626 printk("%02X ", addrs[i]);
627 printk("\n");
628 next_ptr = priv(dev)->rx_head;
629 break;
630 }
631 /*
632 * ignore our own packets...
633 */
634 if (!(*(unsigned long *)&dev->dev_addr[0] ^ *(unsigned long *)&addrs[2+6]) &&
635 !(*(unsigned short *)&dev->dev_addr[4] ^ *(unsigned short *)&addrs[2+10])) {
636 maxcnt ++; /* compensate for loopedback packet */
637 ether3_outw(next_ptr >> 8, REG_RECVEND);
638 } else
639 if (!(status & (RXSTAT_OVERSIZE|RXSTAT_CRCERROR|RXSTAT_DRIBBLEERROR|RXSTAT_SHORTPACKET))) {
640 unsigned int length = next_ptr - this_ptr;
641 struct sk_buff *skb;
642
643 if (next_ptr <= this_ptr)
644 length += RX_END - RX_START;
645
646 skb = dev_alloc_skb(length + 2);
647 if (skb) {
648 unsigned char *buf;
649
650 skb_reserve(skb, 2);
651 buf = skb_put(skb, length);
652 ether3_readbuffer(dev, buf + 12, length - 12);
653 ether3_outw(next_ptr >> 8, REG_RECVEND);
654 *(unsigned short *)(buf + 0) = *(unsigned short *)(addrs + 2);
655 *(unsigned long *)(buf + 2) = *(unsigned long *)(addrs + 4);
656 *(unsigned long *)(buf + 6) = *(unsigned long *)(addrs + 8);
657 *(unsigned short *)(buf + 10) = *(unsigned short *)(addrs + 12);
658 skb->protocol = eth_type_trans(skb, dev);
659 netif_rx(skb);
660 received ++;
661 } else
662 goto dropping;
663 } else {
664 struct net_device_stats *stats = &dev->stats;
665 ether3_outw(next_ptr >> 8, REG_RECVEND);
666 if (status & RXSTAT_OVERSIZE) stats->rx_over_errors ++;
667 if (status & RXSTAT_CRCERROR) stats->rx_crc_errors ++;
668 if (status & RXSTAT_DRIBBLEERROR) stats->rx_fifo_errors ++;
669 if (status & RXSTAT_SHORTPACKET) stats->rx_length_errors ++;
670 stats->rx_errors++;
671 }
672 }
673 while (-- maxcnt);
674
675 done:
676 dev->stats.rx_packets += received;
677 priv(dev)->rx_head = next_ptr;
678 /*
679 * If rx went off line, then that means that the buffer may be full. We
680 * have dropped at least one packet.
681 */
682 if (!(ether3_inw(REG_STATUS) & STAT_RXON)) {
683 dev->stats.rx_dropped++;
684 ether3_outw(next_ptr, REG_RECVPTR);
685 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND);
686 }
687
688 return maxcnt;
689
690 dropping:{
691 static unsigned long last_warned;
692
693 ether3_outw(next_ptr >> 8, REG_RECVEND);
694 /*
695 * Don't print this message too many times...
696 */
697 if (time_after(jiffies, last_warned + 10 * HZ)) {
698 last_warned = jiffies;
699 printk("%s: memory squeeze, dropping packet.\n", dev->name);
700 }
701 dev->stats.rx_dropped++;
702 goto done;
703 }
704 }
705
706 /*
707 * Update stats for the transmitted packet(s)
708 */
709 static void ether3_tx(struct net_device *dev)
710 {
711 unsigned int tx_tail = priv(dev)->tx_tail;
712 int max_work = 14;
713
714 do {
715 unsigned long status;
716
717 /*
718 * Read the packet header
719 */
720 ether3_setbuffer(dev, buffer_read, tx_tail * 0x600);
721 status = ether3_readlong(dev);
722
723 /*
724 * Check to see if this packet has been transmitted
725 */
726 if ((status & (TXSTAT_DONE | TXHDR_TRANSMIT)) !=
727 (TXSTAT_DONE | TXHDR_TRANSMIT))
728 break;
729
730 /*
731 * Update errors
732 */
733 if (!(status & (TXSTAT_BABBLED | TXSTAT_16COLLISIONS)))
734 dev->stats.tx_packets++;
735 else {
736 dev->stats.tx_errors++;
737 if (status & TXSTAT_16COLLISIONS)
738 dev->stats.collisions += 16;
739 if (status & TXSTAT_BABBLED)
740 dev->stats.tx_fifo_errors++;
741 }
742
743 tx_tail = (tx_tail + 1) & 15;
744 } while (--max_work);
745
746 if (priv(dev)->tx_tail != tx_tail) {
747 priv(dev)->tx_tail = tx_tail;
748 netif_wake_queue(dev);
749 }
750 }
751
752 static void __devinit ether3_banner(void)
753 {
754 static unsigned version_printed = 0;
755
756 if (net_debug && version_printed++ == 0)
757 printk(KERN_INFO "%s", version);
758 }
759
760 static const struct net_device_ops ether3_netdev_ops = {
761 .ndo_open = ether3_open,
762 .ndo_stop = ether3_close,
763 .ndo_start_xmit = ether3_sendpacket,
764 .ndo_set_multicast_list = ether3_setmulticastlist,
765 .ndo_tx_timeout = ether3_timeout,
766 .ndo_validate_addr = eth_validate_addr,
767 .ndo_change_mtu = eth_change_mtu,
768 .ndo_set_mac_address = eth_mac_addr,
769 };
770
771 static int __devinit
772 ether3_probe(struct expansion_card *ec, const struct ecard_id *id)
773 {
774 const struct ether3_data *data = id->data;
775 struct net_device *dev;
776 int bus_type, ret;
777
778 ether3_banner();
779
780 ret = ecard_request_resources(ec);
781 if (ret)
782 goto out;
783
784 dev = alloc_etherdev(sizeof(struct dev_priv));
785 if (!dev) {
786 ret = -ENOMEM;
787 goto release;
788 }
789
790 SET_NETDEV_DEV(dev, &ec->dev);
791
792 priv(dev)->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
793 if (!priv(dev)->base) {
794 ret = -ENOMEM;
795 goto free;
796 }
797
798 ec->irqaddr = priv(dev)->base + data->base_offset;
799 ec->irqmask = 0xf0;
800
801 priv(dev)->seeq = priv(dev)->base + data->base_offset;
802 dev->irq = ec->irq;
803
804 ether3_addr(dev->dev_addr, ec);
805
806 init_timer(&priv(dev)->timer);
807
808 /* Reset card...
809 */
810 ether3_outb(0x80, REG_CONFIG2 + 4);
811 bus_type = BUS_UNKNOWN;
812 udelay(4);
813
814 /* Test using Receive Pointer (16-bit register) to find out
815 * how the ether3 is connected to the bus...
816 */
817 if (ether3_probe_bus_8(dev, 0x100) &&
818 ether3_probe_bus_8(dev, 0x201))
819 bus_type = BUS_8;
820
821 if (bus_type == BUS_UNKNOWN &&
822 ether3_probe_bus_16(dev, 0x101) &&
823 ether3_probe_bus_16(dev, 0x201))
824 bus_type = BUS_16;
825
826 switch (bus_type) {
827 case BUS_UNKNOWN:
828 printk(KERN_ERR "%s: unable to identify bus width\n", dev->name);
829 ret = -ENODEV;
830 goto free;
831
832 case BUS_8:
833 printk(KERN_ERR "%s: %s found, but is an unsupported "
834 "8-bit card\n", dev->name, data->name);
835 ret = -ENODEV;
836 goto free;
837
838 default:
839 break;
840 }
841
842 if (ether3_init_2(dev)) {
843 ret = -ENODEV;
844 goto free;
845 }
846
847 dev->netdev_ops = &ether3_netdev_ops;
848 dev->watchdog_timeo = 5 * HZ / 100;
849
850 ret = register_netdev(dev);
851 if (ret)
852 goto free;
853
854 printk("%s: %s in slot %d, %pM\n",
855 dev->name, data->name, ec->slot_no, dev->dev_addr);
856
857 ecard_set_drvdata(ec, dev);
858 return 0;
859
860 free:
861 free_netdev(dev);
862 release:
863 ecard_release_resources(ec);
864 out:
865 return ret;
866 }
867
868 static void __devexit ether3_remove(struct expansion_card *ec)
869 {
870 struct net_device *dev = ecard_get_drvdata(ec);
871
872 ecard_set_drvdata(ec, NULL);
873
874 unregister_netdev(dev);
875 free_netdev(dev);
876 ecard_release_resources(ec);
877 }
878
879 static struct ether3_data ether3 = {
880 .name = "ether3",
881 .base_offset = 0,
882 };
883
884 static struct ether3_data etherb = {
885 .name = "etherb",
886 .base_offset = 0x800,
887 };
888
889 static const struct ecard_id ether3_ids[] = {
890 { MANU_ANT2, PROD_ANT_ETHER3, &ether3 },
891 { MANU_ANT, PROD_ANT_ETHER3, &ether3 },
892 { MANU_ANT, PROD_ANT_ETHERB, &etherb },
893 { 0xffff, 0xffff }
894 };
895
896 static struct ecard_driver ether3_driver = {
897 .probe = ether3_probe,
898 .remove = __devexit_p(ether3_remove),
899 .id_table = ether3_ids,
900 .drv = {
901 .name = "ether3",
902 },
903 };
904
905 static int __init ether3_init(void)
906 {
907 return ecard_register_driver(&ether3_driver);
908 }
909
910 static void __exit ether3_exit(void)
911 {
912 ecard_remove_driver(&ether3_driver);
913 }
914
915 module_init(ether3_init);
916 module_exit(ether3_exit);
917
918 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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