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Linux 3.4.102
[linux/fpc-iii.git] / drivers / net / ethernet / seeq / ether3.c
blobdf808ac8cb6535c88ad0eca0c3aacdd98976e83d
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/ecard.h>
68 #include <asm/io.h>
69
70 static char version[] __devinitdata = "ether3 ethernet driver (c) 1995-2000 R.M.King v1.17\n";
71
72 #include "ether3.h"
73
74 static unsigned int net_debug = NET_DEBUG;
75
76 static void ether3_setmulticastlist(struct net_device *dev);
77 static int ether3_rx(struct net_device *dev, unsigned int maxcnt);
78 static void ether3_tx(struct net_device *dev);
79 static int ether3_open (struct net_device *dev);
80 static int ether3_sendpacket (struct sk_buff *skb, struct net_device *dev);
81 static irqreturn_t ether3_interrupt (int irq, void *dev_id);
82 static int ether3_close (struct net_device *dev);
83 static void ether3_setmulticastlist (struct net_device *dev);
84 static void ether3_timeout(struct net_device *dev);
85
86 #define BUS_16 2
87 #define BUS_8 1
88 #define BUS_UNKNOWN 0
89
90 /* --------------------------------------------------------------------------- */
91
92 typedef enum {
93 buffer_write,
94 buffer_read
95 } buffer_rw_t;
96
97 /*
98 * ether3 read/write. Slow things down a bit...
99 * The SEEQ8005 doesn't like us writing to its registers
100 * too quickly.
101 */
102 static inline void ether3_outb(int v, const void __iomem *r)
103 {
104 writeb(v, r);
105 udelay(1);
106 }
107
108 static inline void ether3_outw(int v, const void __iomem *r)
109 {
110 writew(v, r);
111 udelay(1);
112 }
113 #define ether3_inb(r) ({ unsigned int __v = readb((r)); udelay(1); __v; })
114 #define ether3_inw(r) ({ unsigned int __v = readw((r)); udelay(1); __v; })
115
116 static int
117 ether3_setbuffer(struct net_device *dev, buffer_rw_t read, int start)
118 {
119 int timeout = 1000;
120
121 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
122 ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
123
124 while ((ether3_inw(REG_STATUS) & STAT_FIFOEMPTY) == 0) {
125 if (!timeout--) {
126 printk("%s: setbuffer broken\n", dev->name);
127 priv(dev)->broken = 1;
128 return 1;
129 }
130 udelay(1);
131 }
132
133 if (read == buffer_read) {
134 ether3_outw(start, REG_DMAADDR);
135 ether3_outw(priv(dev)->regs.command | CMD_FIFOREAD, REG_COMMAND);
136 } else {
137 ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
138 ether3_outw(start, REG_DMAADDR);
139 }
140 return 0;
141 }
142
143 /*
144 * write data to the buffer memory
145 */
146 #define ether3_writebuffer(dev,data,length) \
147 writesw(REG_BUFWIN, (data), (length) >> 1)
148
149 #define ether3_writeword(dev,data) \
150 writew((data), REG_BUFWIN)
151
152 #define ether3_writelong(dev,data) { \
153 void __iomem *reg_bufwin = REG_BUFWIN; \
154 writew((data), reg_bufwin); \
155 writew((data) >> 16, reg_bufwin); \
156 }
157
158 /*
159 * read data from the buffer memory
160 */
161 #define ether3_readbuffer(dev,data,length) \
162 readsw(REG_BUFWIN, (data), (length) >> 1)
163
164 #define ether3_readword(dev) \
165 readw(REG_BUFWIN)
166
167 #define ether3_readlong(dev) \
168 readw(REG_BUFWIN) | (readw(REG_BUFWIN) << 16)
169
170 /*
171 * Switch LED off...
172 */
173 static void ether3_ledoff(unsigned long data)
174 {
175 struct net_device *dev = (struct net_device *)data;
176 ether3_outw(priv(dev)->regs.config2 |= CFG2_CTRLO, REG_CONFIG2);
177 }
178
179 /*
180 * switch LED on...
181 */
182 static inline void ether3_ledon(struct net_device *dev)
183 {
184 del_timer(&priv(dev)->timer);
185 priv(dev)->timer.expires = jiffies + HZ / 50; /* leave on for 1/50th second */
186 priv(dev)->timer.data = (unsigned long)dev;
187 priv(dev)->timer.function = ether3_ledoff;
188 add_timer(&priv(dev)->timer);
189 if (priv(dev)->regs.config2 & CFG2_CTRLO)
190 ether3_outw(priv(dev)->regs.config2 &= ~CFG2_CTRLO, REG_CONFIG2);
191 }
192
193 /*
194 * Read the ethernet address string from the on board rom.
195 * This is an ascii string!!!
196 */
197 static int __devinit
198 ether3_addr(char *addr, struct expansion_card *ec)
199 {
200 struct in_chunk_dir cd;
201 char *s;
202
203 if (ecard_readchunk(&cd, ec, 0xf5, 0) && (s = strchr(cd.d.string, '('))) {
204 int i;
205 for (i = 0; i<6; i++) {
206 addr[i] = simple_strtoul(s + 1, &s, 0x10);
207 if (*s != (i==5?')' : ':' ))
208 break;
209 }
210 if (i == 6)
211 return 0;
212 }
213 /* I wonder if we should even let the user continue in this case
214 * - no, it would be better to disable the device
215 */
216 printk(KERN_ERR "ether3: Couldn't read a valid MAC address from card.\n");
217 return -ENODEV;
218 }
219
220 /* --------------------------------------------------------------------------- */
221
222 static int __devinit
223 ether3_ramtest(struct net_device *dev, unsigned char byte)
224 {
225 unsigned char *buffer = kmalloc(RX_END, GFP_KERNEL);
226 int i,ret = 0;
227 int max_errors = 4;
228 int bad = -1;
229
230 if (!buffer)
231 return 1;
232
233 memset(buffer, byte, RX_END);
234 ether3_setbuffer(dev, buffer_write, 0);
235 ether3_writebuffer(dev, buffer, TX_END);
236 ether3_setbuffer(dev, buffer_write, RX_START);
237 ether3_writebuffer(dev, buffer + RX_START, RX_LEN);
238 memset(buffer, byte ^ 0xff, RX_END);
239 ether3_setbuffer(dev, buffer_read, 0);
240 ether3_readbuffer(dev, buffer, TX_END);
241 ether3_setbuffer(dev, buffer_read, RX_START);
242 ether3_readbuffer(dev, buffer + RX_START, RX_LEN);
243
244 for (i = 0; i < RX_END; i++) {
245 if (buffer[i] != byte) {
246 if (max_errors > 0 && bad != buffer[i]) {
247 printk("%s: RAM failed with (%02X instead of %02X) at 0x%04X",
248 dev->name, buffer[i], byte, i);
249 ret = 2;
250 max_errors--;
251 bad = i;
252 }
253 } else {
254 if (bad != -1) {
255 if (bad != i - 1)
256 printk(" - 0x%04X\n", i - 1);
257 printk("\n");
258 bad = -1;
259 }
260 }
261 }
262 if (bad != -1)
263 printk(" - 0xffff\n");
264 kfree(buffer);
265
266 return ret;
267 }
268
269 /* ------------------------------------------------------------------------------- */
270
271 static int __devinit ether3_init_2(struct net_device *dev)
272 {
273 int i;
274
275 priv(dev)->regs.config1 = CFG1_RECVCOMPSTAT0|CFG1_DMABURST8;
276 priv(dev)->regs.config2 = CFG2_CTRLO|CFG2_RECVCRC|CFG2_ERRENCRC;
277 priv(dev)->regs.command = 0;
278
279 /*
280 * Set up our hardware address
281 */
282 ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
283 for (i = 0; i < 6; i++)
284 ether3_outb(dev->dev_addr[i], REG_BUFWIN);
285
286 if (dev->flags & IFF_PROMISC)
287 priv(dev)->regs.config1 |= CFG1_RECVPROMISC;
288 else if (dev->flags & IFF_MULTICAST)
289 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI;
290 else
291 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD;
292
293 /*
294 * There is a problem with the NQ8005 in that it occasionally loses the
295 * last two bytes. To get round this problem, we receive the CRC as
296 * well. That way, if we do lose the last two, then it doesn't matter.
297 */
298 ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
299 ether3_outw((TX_END>>8) - 1, REG_BUFWIN);
300 ether3_outw(priv(dev)->rx_head, REG_RECVPTR);
301 ether3_outw(0, REG_TRANSMITPTR);
302 ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND);
303 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
304 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
305 ether3_outw(priv(dev)->regs.command, REG_COMMAND);
306
307 i = ether3_ramtest(dev, 0x5A);
308 if(i)
309 return i;
310 i = ether3_ramtest(dev, 0x1E);
311 if(i)
312 return i;
313
314 ether3_setbuffer(dev, buffer_write, 0);
315 ether3_writelong(dev, 0);
316 return 0;
317 }
318
319 static void
320 ether3_init_for_open(struct net_device *dev)
321 {
322 int i;
323
324 /* Reset the chip */
325 ether3_outw(CFG2_RESET, REG_CONFIG2);
326 udelay(4);
327
328 priv(dev)->regs.command = 0;
329 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
330 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
331 barrier();
332
333 ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
334 for (i = 0; i < 6; i++)
335 ether3_outb(dev->dev_addr[i], REG_BUFWIN);
336
337 priv(dev)->tx_head = 0;
338 priv(dev)->tx_tail = 0;
339 priv(dev)->regs.config2 |= CFG2_CTRLO;
340 priv(dev)->rx_head = RX_START;
341
342 ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
343 ether3_outw((TX_END>>8) - 1, REG_BUFWIN);
344 ether3_outw(priv(dev)->rx_head, REG_RECVPTR);
345 ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND);
346 ether3_outw(0, REG_TRANSMITPTR);
347 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
348 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
349
350 ether3_setbuffer(dev, buffer_write, 0);
351 ether3_writelong(dev, 0);
352
353 priv(dev)->regs.command = CMD_ENINTRX | CMD_ENINTTX;
354 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND);
355 }
356
357 static inline int
358 ether3_probe_bus_8(struct net_device *dev, int val)
359 {
360 int write_low, write_high, read_low, read_high;
361
362 write_low = val & 255;
363 write_high = val >> 8;
364
365 printk(KERN_DEBUG "ether3_probe: write8 [%02X:%02X]", write_high, write_low);
366
367 ether3_outb(write_low, REG_RECVPTR);
368 ether3_outb(write_high, REG_RECVPTR + 4);
369
370 read_low = ether3_inb(REG_RECVPTR);
371 read_high = ether3_inb(REG_RECVPTR + 4);
372
373 printk(", read8 [%02X:%02X]\n", read_high, read_low);
374
375 return read_low == write_low && read_high == write_high;
376 }
377
378 static inline int
379 ether3_probe_bus_16(struct net_device *dev, int val)
380 {
381 int read_val;
382
383 ether3_outw(val, REG_RECVPTR);
384 read_val = ether3_inw(REG_RECVPTR);
385
386 printk(KERN_DEBUG "ether3_probe: write16 [%04X], read16 [%04X]\n", val, read_val);
387
388 return read_val == val;
389 }
390
391 /*
392 * Open/initialize the board. This is called (in the current kernel)
393 * sometime after booting when the 'ifconfig' program is run.
394 *
395 * This routine should set everything up anew at each open, even
396 * registers that "should" only need to be set once at boot, so that
397 * there is non-reboot way to recover if something goes wrong.
398 */
399 static int
400 ether3_open(struct net_device *dev)
401 {
402 if (!is_valid_ether_addr(dev->dev_addr)) {
403 printk(KERN_WARNING "%s: invalid ethernet MAC address\n",
404 dev->name);
405 return -EINVAL;
406 }
407
408 if (request_irq(dev->irq, ether3_interrupt, 0, "ether3", dev))
409 return -EAGAIN;
410
411 ether3_init_for_open(dev);
412
413 netif_start_queue(dev);
414
415 return 0;
416 }
417
418 /*
419 * The inverse routine to ether3_open().
420 */
421 static int
422 ether3_close(struct net_device *dev)
423 {
424 netif_stop_queue(dev);
425
426 disable_irq(dev->irq);
427
428 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
429 priv(dev)->regs.command = 0;
430 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
431 barrier();
432 ether3_outb(0x80, REG_CONFIG2 + 4);
433 ether3_outw(0, REG_COMMAND);
434
435 free_irq(dev->irq, dev);
436
437 return 0;
438 }
439
440 /*
441 * Set or clear promiscuous/multicast mode filter for this adaptor.
442 *
443 * We don't attempt any packet filtering. The card may have a SEEQ 8004
444 * in which does not have the other ethernet address registers present...
445 */
446 static void ether3_setmulticastlist(struct net_device *dev)
447 {
448 priv(dev)->regs.config1 &= ~CFG1_RECVPROMISC;
449
450 if (dev->flags & IFF_PROMISC) {
451 /* promiscuous mode */
452 priv(dev)->regs.config1 |= CFG1_RECVPROMISC;
453 } else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev)) {
454 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI;
455 } else
456 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD;
457
458 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
459 }
460
461 static void ether3_timeout(struct net_device *dev)
462 {
463 unsigned long flags;
464
465 del_timer(&priv(dev)->timer);
466
467 local_irq_save(flags);
468 printk(KERN_ERR "%s: transmit timed out, network cable problem?\n", dev->name);
469 printk(KERN_ERR "%s: state: { status=%04X cfg1=%04X cfg2=%04X }\n", dev->name,
470 ether3_inw(REG_STATUS), ether3_inw(REG_CONFIG1), ether3_inw(REG_CONFIG2));
471 printk(KERN_ERR "%s: { rpr=%04X rea=%04X tpr=%04X }\n", dev->name,
472 ether3_inw(REG_RECVPTR), ether3_inw(REG_RECVEND), ether3_inw(REG_TRANSMITPTR));
473 printk(KERN_ERR "%s: tx head=%X tx tail=%X\n", dev->name,
474 priv(dev)->tx_head, priv(dev)->tx_tail);
475 ether3_setbuffer(dev, buffer_read, priv(dev)->tx_tail);
476 printk(KERN_ERR "%s: packet status = %08X\n", dev->name, ether3_readlong(dev));
477 local_irq_restore(flags);
478
479 priv(dev)->regs.config2 |= CFG2_CTRLO;
480 dev->stats.tx_errors += 1;
481 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
482 priv(dev)->tx_head = priv(dev)->tx_tail = 0;
483
484 netif_wake_queue(dev);
485 }
486
487 /*
488 * Transmit a packet
489 */
490 static int
491 ether3_sendpacket(struct sk_buff *skb, struct net_device *dev)
492 {
493 unsigned long flags;
494 unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
495 unsigned int ptr, next_ptr;
496
497 if (priv(dev)->broken) {
498 dev_kfree_skb(skb);
499 dev->stats.tx_dropped++;
500 netif_start_queue(dev);
501 return NETDEV_TX_OK;
502 }
503
504 length = (length + 1) & ~1;
505 if (length != skb->len) {
506 if (skb_padto(skb, length))
507 goto out;
508 }
509
510 next_ptr = (priv(dev)->tx_head + 1) & 15;
511
512 local_irq_save(flags);
513
514 if (priv(dev)->tx_tail == next_ptr) {
515 local_irq_restore(flags);
516 return NETDEV_TX_BUSY; /* unable to queue */
517 }
518
519 ptr = 0x600 * priv(dev)->tx_head;
520 priv(dev)->tx_head = next_ptr;
521 next_ptr *= 0x600;
522
523 #define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS)
524
525 ether3_setbuffer(dev, buffer_write, next_ptr);
526 ether3_writelong(dev, 0);
527 ether3_setbuffer(dev, buffer_write, ptr);
528 ether3_writelong(dev, 0);
529 ether3_writebuffer(dev, skb->data, length);
530 ether3_writeword(dev, htons(next_ptr));
531 ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16);
532 ether3_setbuffer(dev, buffer_write, ptr);
533 ether3_writeword(dev, htons((ptr + length + 4)));
534 ether3_writeword(dev, TXHDR_FLAGS >> 16);
535 ether3_ledon(dev);
536
537 if (!(ether3_inw(REG_STATUS) & STAT_TXON)) {
538 ether3_outw(ptr, REG_TRANSMITPTR);
539 ether3_outw(priv(dev)->regs.command | CMD_TXON, REG_COMMAND);
540 }
541
542 next_ptr = (priv(dev)->tx_head + 1) & 15;
543 local_irq_restore(flags);
544
545 dev_kfree_skb(skb);
546
547 if (priv(dev)->tx_tail == next_ptr)
548 netif_stop_queue(dev);
549
550 out:
551 return NETDEV_TX_OK;
552 }
553
554 static irqreturn_t
555 ether3_interrupt(int irq, void *dev_id)
556 {
557 struct net_device *dev = (struct net_device *)dev_id;
558 unsigned int status, handled = IRQ_NONE;
559
560 #if NET_DEBUG > 1
561 if(net_debug & DEBUG_INT)
562 printk("eth3irq: %d ", irq);
563 #endif
564
565 status = ether3_inw(REG_STATUS);
566
567 if (status & STAT_INTRX) {
568 ether3_outw(CMD_ACKINTRX | priv(dev)->regs.command, REG_COMMAND);
569 ether3_rx(dev, 12);
570 handled = IRQ_HANDLED;
571 }
572
573 if (status & STAT_INTTX) {
574 ether3_outw(CMD_ACKINTTX | priv(dev)->regs.command, REG_COMMAND);
575 ether3_tx(dev);
576 handled = IRQ_HANDLED;
577 }
578
579 #if NET_DEBUG > 1
580 if(net_debug & DEBUG_INT)
581 printk("done\n");
582 #endif
583 return handled;
584 }
585
586 /*
587 * If we have a good packet(s), get it/them out of the buffers.
588 */
589 static int ether3_rx(struct net_device *dev, unsigned int maxcnt)
590 {
591 unsigned int next_ptr = priv(dev)->rx_head, received = 0;
592
593 ether3_ledon(dev);
594
595 do {
596 unsigned int this_ptr, status;
597 unsigned char addrs[16];
598
599 /*
600 * read the first 16 bytes from the buffer.
601 * This contains the status bytes etc and ethernet addresses,
602 * and we also check the source ethernet address to see if
603 * it originated from us.
604 */
605 {
606 unsigned int temp_ptr;
607 ether3_setbuffer(dev, buffer_read, next_ptr);
608 temp_ptr = ether3_readword(dev);
609 status = ether3_readword(dev);
610 if ((status & (RXSTAT_DONE | RXHDR_CHAINCONTINUE | RXHDR_RECEIVE)) !=
611 (RXSTAT_DONE | RXHDR_CHAINCONTINUE) || !temp_ptr)
612 break;
613
614 this_ptr = next_ptr + 4;
615 next_ptr = ntohs(temp_ptr);
616 }
617 ether3_setbuffer(dev, buffer_read, this_ptr);
618 ether3_readbuffer(dev, addrs+2, 12);
619
620 if (next_ptr < RX_START || next_ptr >= RX_END) {
621 int i;
622 printk("%s: bad next pointer @%04X: ", dev->name, priv(dev)->rx_head);
623 printk("%02X %02X %02X %02X ", next_ptr >> 8, next_ptr & 255, status & 255, status >> 8);
624 for (i = 2; i < 14; i++)
625 printk("%02X ", addrs[i]);
626 printk("\n");
627 next_ptr = priv(dev)->rx_head;
628 break;
629 }
630 /*
631 * ignore our own packets...
632 */
633 if (!(*(unsigned long *)&dev->dev_addr[0] ^ *(unsigned long *)&addrs[2+6]) &&
634 !(*(unsigned short *)&dev->dev_addr[4] ^ *(unsigned short *)&addrs[2+10])) {
635 maxcnt ++; /* compensate for loopedback packet */
636 ether3_outw(next_ptr >> 8, REG_RECVEND);
637 } else
638 if (!(status & (RXSTAT_OVERSIZE|RXSTAT_CRCERROR|RXSTAT_DRIBBLEERROR|RXSTAT_SHORTPACKET))) {
639 unsigned int length = next_ptr - this_ptr;
640 struct sk_buff *skb;
641
642 if (next_ptr <= this_ptr)
643 length += RX_END - RX_START;
644
645 skb = netdev_alloc_skb(dev, length + 2);
646 if (skb) {
647 unsigned char *buf;
648
649 skb_reserve(skb, 2);
650 buf = skb_put(skb, length);
651 ether3_readbuffer(dev, buf + 12, length - 12);
652 ether3_outw(next_ptr >> 8, REG_RECVEND);
653 *(unsigned short *)(buf + 0) = *(unsigned short *)(addrs + 2);
654 *(unsigned long *)(buf + 2) = *(unsigned long *)(addrs + 4);
655 *(unsigned long *)(buf + 6) = *(unsigned long *)(addrs + 8);
656 *(unsigned short *)(buf + 10) = *(unsigned short *)(addrs + 12);
657 skb->protocol = eth_type_trans(skb, dev);
658 netif_rx(skb);
659 received ++;
660 } else
661 goto dropping;
662 } else {
663 struct net_device_stats *stats = &dev->stats;
664 ether3_outw(next_ptr >> 8, REG_RECVEND);
665 if (status & RXSTAT_OVERSIZE) stats->rx_over_errors ++;
666 if (status & RXSTAT_CRCERROR) stats->rx_crc_errors ++;
667 if (status & RXSTAT_DRIBBLEERROR) stats->rx_fifo_errors ++;
668 if (status & RXSTAT_SHORTPACKET) stats->rx_length_errors ++;
669 stats->rx_errors++;
670 }
671 }
672 while (-- maxcnt);
673
674 done:
675 dev->stats.rx_packets += received;
676 priv(dev)->rx_head = next_ptr;
677 /*
678 * If rx went off line, then that means that the buffer may be full. We
679 * have dropped at least one packet.
680 */
681 if (!(ether3_inw(REG_STATUS) & STAT_RXON)) {
682 dev->stats.rx_dropped++;
683 ether3_outw(next_ptr, REG_RECVPTR);
684 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND);
685 }
686
687 return maxcnt;
688
689 dropping:{
690 static unsigned long last_warned;
691
692 ether3_outw(next_ptr >> 8, REG_RECVEND);
693 /*
694 * Don't print this message too many times...
695 */
696 if (time_after(jiffies, last_warned + 10 * HZ)) {
697 last_warned = jiffies;
698 printk("%s: memory squeeze, dropping packet.\n", dev->name);
699 }
700 dev->stats.rx_dropped++;
701 goto done;
702 }
703 }
704
705 /*
706 * Update stats for the transmitted packet(s)
707 */
708 static void ether3_tx(struct net_device *dev)
709 {
710 unsigned int tx_tail = priv(dev)->tx_tail;
711 int max_work = 14;
712
713 do {
714 unsigned long status;
715
716 /*
717 * Read the packet header
718 */
719 ether3_setbuffer(dev, buffer_read, tx_tail * 0x600);
720 status = ether3_readlong(dev);
721
722 /*
723 * Check to see if this packet has been transmitted
724 */
725 if ((status & (TXSTAT_DONE | TXHDR_TRANSMIT)) !=
726 (TXSTAT_DONE | TXHDR_TRANSMIT))
727 break;
728
729 /*
730 * Update errors
731 */
732 if (!(status & (TXSTAT_BABBLED | TXSTAT_16COLLISIONS)))
733 dev->stats.tx_packets++;
734 else {
735 dev->stats.tx_errors++;
736 if (status & TXSTAT_16COLLISIONS)
737 dev->stats.collisions += 16;
738 if (status & TXSTAT_BABBLED)
739 dev->stats.tx_fifo_errors++;
740 }
741
742 tx_tail = (tx_tail + 1) & 15;
743 } while (--max_work);
744
745 if (priv(dev)->tx_tail != tx_tail) {
746 priv(dev)->tx_tail = tx_tail;
747 netif_wake_queue(dev);
748 }
749 }
750
751 static void __devinit ether3_banner(void)
752 {
753 static unsigned version_printed = 0;
754
755 if (net_debug && version_printed++ == 0)
756 printk(KERN_INFO "%s", version);
757 }
758
759 static const struct net_device_ops ether3_netdev_ops = {
760 .ndo_open = ether3_open,
761 .ndo_stop = ether3_close,
762 .ndo_start_xmit = ether3_sendpacket,
763 .ndo_set_rx_mode = ether3_setmulticastlist,
764 .ndo_tx_timeout = ether3_timeout,
765 .ndo_validate_addr = eth_validate_addr,
766 .ndo_change_mtu = eth_change_mtu,
767 .ndo_set_mac_address = eth_mac_addr,
768 };
769
770 static int __devinit
771 ether3_probe(struct expansion_card *ec, const struct ecard_id *id)
772 {
773 const struct ether3_data *data = id->data;
774 struct net_device *dev;
775 int bus_type, ret;
776
777 ether3_banner();
778
779 ret = ecard_request_resources(ec);
780 if (ret)
781 goto out;
782
783 dev = alloc_etherdev(sizeof(struct dev_priv));
784 if (!dev) {
785 ret = -ENOMEM;
786 goto release;
787 }
788
789 SET_NETDEV_DEV(dev, &ec->dev);
790
791 priv(dev)->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
792 if (!priv(dev)->base) {
793 ret = -ENOMEM;
794 goto free;
795 }
796
797 ec->irqaddr = priv(dev)->base + data->base_offset;
798 ec->irqmask = 0xf0;
799
800 priv(dev)->seeq = priv(dev)->base + data->base_offset;
801 dev->irq = ec->irq;
802
803 ether3_addr(dev->dev_addr, ec);
804
805 init_timer(&priv(dev)->timer);
806
807 /* Reset card...
808 */
809 ether3_outb(0x80, REG_CONFIG2 + 4);
810 bus_type = BUS_UNKNOWN;
811 udelay(4);
812
813 /* Test using Receive Pointer (16-bit register) to find out
814 * how the ether3 is connected to the bus...
815 */
816 if (ether3_probe_bus_8(dev, 0x100) &&
817 ether3_probe_bus_8(dev, 0x201))
818 bus_type = BUS_8;
819
820 if (bus_type == BUS_UNKNOWN &&
821 ether3_probe_bus_16(dev, 0x101) &&
822 ether3_probe_bus_16(dev, 0x201))
823 bus_type = BUS_16;
824
825 switch (bus_type) {
826 case BUS_UNKNOWN:
827 printk(KERN_ERR "%s: unable to identify bus width\n", dev->name);
828 ret = -ENODEV;
829 goto free;
830
831 case BUS_8:
832 printk(KERN_ERR "%s: %s found, but is an unsupported "
833 "8-bit card\n", dev->name, data->name);
834 ret = -ENODEV;
835 goto free;
836
837 default:
838 break;
839 }
840
841 if (ether3_init_2(dev)) {
842 ret = -ENODEV;
843 goto free;
844 }
845
846 dev->netdev_ops = &ether3_netdev_ops;
847 dev->watchdog_timeo = 5 * HZ / 100;
848
849 ret = register_netdev(dev);
850 if (ret)
851 goto free;
852
853 printk("%s: %s in slot %d, %pM\n",
854 dev->name, data->name, ec->slot_no, dev->dev_addr);
855
856 ecard_set_drvdata(ec, dev);
857 return 0;
858
859 free:
860 free_netdev(dev);
861 release:
862 ecard_release_resources(ec);
863 out:
864 return ret;
865 }
866
867 static void __devexit ether3_remove(struct expansion_card *ec)
868 {
869 struct net_device *dev = ecard_get_drvdata(ec);
870
871 ecard_set_drvdata(ec, NULL);
872
873 unregister_netdev(dev);
874 free_netdev(dev);
875 ecard_release_resources(ec);
876 }
877
878 static struct ether3_data ether3 = {
879 .name = "ether3",
880 .base_offset = 0,
881 };
882
883 static struct ether3_data etherb = {
884 .name = "etherb",
885 .base_offset = 0x800,
886 };
887
888 static const struct ecard_id ether3_ids[] = {
889 { MANU_ANT2, PROD_ANT_ETHER3, &ether3 },
890 { MANU_ANT, PROD_ANT_ETHER3, &ether3 },
891 { MANU_ANT, PROD_ANT_ETHERB, &etherb },
892 { 0xffff, 0xffff }
893 };
894
895 static struct ecard_driver ether3_driver = {
896 .probe = ether3_probe,
897 .remove = __devexit_p(ether3_remove),
898 .id_table = ether3_ids,
899 .drv = {
900 .name = "ether3",
901 },
902 };
903
904 static int __init ether3_init(void)
905 {
906 return ecard_register_driver(&ether3_driver);
907 }
908
909 static void __exit ether3_exit(void)
910 {
911 ecard_remove_driver(&ether3_driver);
912 }
913
914 module_init(ether3_init);
915 module_exit(ether3_exit);
916
917 MODULE_LICENSE("GPL");
Linux with added FPC-III support