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IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
[linux-2.6/verdex.git] / drivers / net / arm / ether3.c
blob84686c8a5bc271aa706a985770c5e70708995043
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/sched.h>
52 #include <linux/types.h>
53 #include <linux/fcntl.h>
54 #include <linux/interrupt.h>
55 #include <linux/ptrace.h>
56 #include <linux/ioport.h>
57 #include <linux/in.h>
58 #include <linux/slab.h>
59 #include <linux/string.h>
60 #include <linux/errno.h>
61 #include <linux/netdevice.h>
62 #include <linux/etherdevice.h>
63 #include <linux/skbuff.h>
64 #include <linux/device.h>
65 #include <linux/init.h>
66 #include <linux/delay.h>
67 #include <linux/bitops.h>
68
69 #include <asm/system.h>
70 #include <asm/ecard.h>
71 #include <asm/io.h>
72
73 static char version[] __initdata = "ether3 ethernet driver (c) 1995-2000 R.M.King v1.17\n";
74
75 #include "ether3.h"
76
77 static unsigned int net_debug = NET_DEBUG;
78
79 static void ether3_setmulticastlist(struct net_device *dev);
80 static int ether3_rx(struct net_device *dev, unsigned int maxcnt);
81 static void ether3_tx(struct net_device *dev);
82 static int ether3_open (struct net_device *dev);
83 static int ether3_sendpacket (struct sk_buff *skb, struct net_device *dev);
84 static irqreturn_t ether3_interrupt (int irq, void *dev_id);
85 static int ether3_close (struct net_device *dev);
86 static struct net_device_stats *ether3_getstats (struct net_device *dev);
87 static void ether3_setmulticastlist (struct net_device *dev);
88 static void ether3_timeout(struct net_device *dev);
89
90 #define BUS_16 2
91 #define BUS_8 1
92 #define BUS_UNKNOWN 0
93
94 /* --------------------------------------------------------------------------- */
95
96 typedef enum {
97 buffer_write,
98 buffer_read
99 } buffer_rw_t;
100
101 /*
102 * ether3 read/write. Slow things down a bit...
103 * The SEEQ8005 doesn't like us writing to its registers
104 * too quickly.
105 */
106 static inline void ether3_outb(int v, const void __iomem *r)
107 {
108 writeb(v, r);
109 udelay(1);
110 }
111
112 static inline void ether3_outw(int v, const void __iomem *r)
113 {
114 writew(v, r);
115 udelay(1);
116 }
117 #define ether3_inb(r) ({ unsigned int __v = readb((r)); udelay(1); __v; })
118 #define ether3_inw(r) ({ unsigned int __v = readw((r)); udelay(1); __v; })
119
120 static int
121 ether3_setbuffer(struct net_device *dev, buffer_rw_t read, int start)
122 {
123 int timeout = 1000;
124
125 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
126 ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
127
128 while ((ether3_inw(REG_STATUS) & STAT_FIFOEMPTY) == 0) {
129 if (!timeout--) {
130 printk("%s: setbuffer broken\n", dev->name);
131 priv(dev)->broken = 1;
132 return 1;
133 }
134 udelay(1);
135 }
136
137 if (read == buffer_read) {
138 ether3_outw(start, REG_DMAADDR);
139 ether3_outw(priv(dev)->regs.command | CMD_FIFOREAD, REG_COMMAND);
140 } else {
141 ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
142 ether3_outw(start, REG_DMAADDR);
143 }
144 return 0;
145 }
146
147 /*
148 * write data to the buffer memory
149 */
150 #define ether3_writebuffer(dev,data,length) \
151 writesw(REG_BUFWIN, (data), (length) >> 1)
152
153 #define ether3_writeword(dev,data) \
154 writew((data), REG_BUFWIN)
155
156 #define ether3_writelong(dev,data) { \
157 void __iomem *reg_bufwin = REG_BUFWIN; \
158 writew((data), reg_bufwin); \
159 writew((data) >> 16, reg_bufwin); \
160 }
161
162 /*
163 * read data from the buffer memory
164 */
165 #define ether3_readbuffer(dev,data,length) \
166 readsw(REG_BUFWIN, (data), (length) >> 1)
167
168 #define ether3_readword(dev) \
169 readw(REG_BUFWIN)
170
171 #define ether3_readlong(dev) \
172 readw(REG_BUFWIN) | (readw(REG_BUFWIN) << 16)
173
174 /*
175 * Switch LED off...
176 */
177 static void ether3_ledoff(unsigned long data)
178 {
179 struct net_device *dev = (struct net_device *)data;
180 ether3_outw(priv(dev)->regs.config2 |= CFG2_CTRLO, REG_CONFIG2);
181 }
182
183 /*
184 * switch LED on...
185 */
186 static inline void ether3_ledon(struct net_device *dev)
187 {
188 del_timer(&priv(dev)->timer);
189 priv(dev)->timer.expires = jiffies + HZ / 50; /* leave on for 1/50th second */
190 priv(dev)->timer.data = (unsigned long)dev;
191 priv(dev)->timer.function = ether3_ledoff;
192 add_timer(&priv(dev)->timer);
193 if (priv(dev)->regs.config2 & CFG2_CTRLO)
194 ether3_outw(priv(dev)->regs.config2 &= ~CFG2_CTRLO, REG_CONFIG2);
195 }
196
197 /*
198 * Read the ethernet address string from the on board rom.
199 * This is an ascii string!!!
200 */
201 static int __init
202 ether3_addr(char *addr, struct expansion_card *ec)
203 {
204 struct in_chunk_dir cd;
205 char *s;
206
207 if (ecard_readchunk(&cd, ec, 0xf5, 0) && (s = strchr(cd.d.string, '('))) {
208 int i;
209 for (i = 0; i<6; i++) {
210 addr[i] = simple_strtoul(s + 1, &s, 0x10);
211 if (*s != (i==5?')' : ':' ))
212 break;
213 }
214 if (i == 6)
215 return 0;
216 }
217 /* I wonder if we should even let the user continue in this case
218 * - no, it would be better to disable the device
219 */
220 printk(KERN_ERR "ether3: Couldn't read a valid MAC address from card.\n");
221 return -ENODEV;
222 }
223
224 /* --------------------------------------------------------------------------- */
225
226 static int __init
227 ether3_ramtest(struct net_device *dev, unsigned char byte)
228 {
229 unsigned char *buffer = kmalloc(RX_END, GFP_KERNEL);
230 int i,ret = 0;
231 int max_errors = 4;
232 int bad = -1;
233
234 if (!buffer)
235 return 1;
236
237 memset(buffer, byte, RX_END);
238 ether3_setbuffer(dev, buffer_write, 0);
239 ether3_writebuffer(dev, buffer, TX_END);
240 ether3_setbuffer(dev, buffer_write, RX_START);
241 ether3_writebuffer(dev, buffer + RX_START, RX_LEN);
242 memset(buffer, byte ^ 0xff, RX_END);
243 ether3_setbuffer(dev, buffer_read, 0);
244 ether3_readbuffer(dev, buffer, TX_END);
245 ether3_setbuffer(dev, buffer_read, RX_START);
246 ether3_readbuffer(dev, buffer + RX_START, RX_LEN);
247
248 for (i = 0; i < RX_END; i++) {
249 if (buffer[i] != byte) {
250 if (max_errors > 0 && bad != buffer[i]) {
251 printk("%s: RAM failed with (%02X instead of %02X) at 0x%04X",
252 dev->name, buffer[i], byte, i);
253 ret = 2;
254 max_errors--;
255 bad = i;
256 }
257 } else {
258 if (bad != -1) {
259 if (bad != i - 1)
260 printk(" - 0x%04X\n", i - 1);
261 printk("\n");
262 bad = -1;
263 }
264 }
265 }
266 if (bad != -1)
267 printk(" - 0xffff\n");
268 kfree(buffer);
269
270 return ret;
271 }
272
273 /* ------------------------------------------------------------------------------- */
274
275 static int __init ether3_init_2(struct net_device *dev)
276 {
277 int i;
278
279 priv(dev)->regs.config1 = CFG1_RECVCOMPSTAT0|CFG1_DMABURST8;
280 priv(dev)->regs.config2 = CFG2_CTRLO|CFG2_RECVCRC|CFG2_ERRENCRC;
281 priv(dev)->regs.command = 0;
282
283 /*
284 * Set up our hardware address
285 */
286 ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
287 for (i = 0; i < 6; i++)
288 ether3_outb(dev->dev_addr[i], REG_BUFWIN);
289
290 if (dev->flags & IFF_PROMISC)
291 priv(dev)->regs.config1 |= CFG1_RECVPROMISC;
292 else if (dev->flags & IFF_MULTICAST)
293 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI;
294 else
295 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD;
296
297 /*
298 * There is a problem with the NQ8005 in that it occasionally loses the
299 * last two bytes. To get round this problem, we receive the CRC as
300 * well. That way, if we do lose the last two, then it doesn't matter.
301 */
302 ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
303 ether3_outw((TX_END>>8) - 1, REG_BUFWIN);
304 ether3_outw(priv(dev)->rx_head, REG_RECVPTR);
305 ether3_outw(0, REG_TRANSMITPTR);
306 ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND);
307 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
308 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
309 ether3_outw(priv(dev)->regs.command, REG_COMMAND);
310
311 i = ether3_ramtest(dev, 0x5A);
312 if(i)
313 return i;
314 i = ether3_ramtest(dev, 0x1E);
315 if(i)
316 return i;
317
318 ether3_setbuffer(dev, buffer_write, 0);
319 ether3_writelong(dev, 0);
320 return 0;
321 }
322
323 static void
324 ether3_init_for_open(struct net_device *dev)
325 {
326 int i;
327
328 memset(&priv(dev)->stats, 0, sizeof(struct net_device_stats));
329
330 /* Reset the chip */
331 ether3_outw(CFG2_RESET, REG_CONFIG2);
332 udelay(4);
333
334 priv(dev)->regs.command = 0;
335 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
336 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
337 barrier();
338
339 ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
340 for (i = 0; i < 6; i++)
341 ether3_outb(dev->dev_addr[i], REG_BUFWIN);
342
343 priv(dev)->tx_head = 0;
344 priv(dev)->tx_tail = 0;
345 priv(dev)->regs.config2 |= CFG2_CTRLO;
346 priv(dev)->rx_head = RX_START;
347
348 ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
349 ether3_outw((TX_END>>8) - 1, REG_BUFWIN);
350 ether3_outw(priv(dev)->rx_head, REG_RECVPTR);
351 ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND);
352 ether3_outw(0, REG_TRANSMITPTR);
353 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
354 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
355
356 ether3_setbuffer(dev, buffer_write, 0);
357 ether3_writelong(dev, 0);
358
359 priv(dev)->regs.command = CMD_ENINTRX | CMD_ENINTTX;
360 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND);
361 }
362
363 static inline int
364 ether3_probe_bus_8(struct net_device *dev, int val)
365 {
366 int write_low, write_high, read_low, read_high;
367
368 write_low = val & 255;
369 write_high = val >> 8;
370
371 printk(KERN_DEBUG "ether3_probe: write8 [%02X:%02X]", write_high, write_low);
372
373 ether3_outb(write_low, REG_RECVPTR);
374 ether3_outb(write_high, REG_RECVPTR + 4);
375
376 read_low = ether3_inb(REG_RECVPTR);
377 read_high = ether3_inb(REG_RECVPTR + 4);
378
379 printk(", read8 [%02X:%02X]\n", read_high, read_low);
380
381 return read_low == write_low && read_high == write_high;
382 }
383
384 static inline int
385 ether3_probe_bus_16(struct net_device *dev, int val)
386 {
387 int read_val;
388
389 ether3_outw(val, REG_RECVPTR);
390 read_val = ether3_inw(REG_RECVPTR);
391
392 printk(KERN_DEBUG "ether3_probe: write16 [%04X], read16 [%04X]\n", val, read_val);
393
394 return read_val == val;
395 }
396
397 /*
398 * Open/initialize the board. This is called (in the current kernel)
399 * sometime after booting when the 'ifconfig' program is run.
400 *
401 * This routine should set everything up anew at each open, even
402 * registers that "should" only need to be set once at boot, so that
403 * there is non-reboot way to recover if something goes wrong.
404 */
405 static int
406 ether3_open(struct net_device *dev)
407 {
408 if (!is_valid_ether_addr(dev->dev_addr)) {
409 printk(KERN_WARNING "%s: invalid ethernet MAC address\n",
410 dev->name);
411 return -EINVAL;
412 }
413
414 if (request_irq(dev->irq, ether3_interrupt, 0, "ether3", dev))
415 return -EAGAIN;
416
417 ether3_init_for_open(dev);
418
419 netif_start_queue(dev);
420
421 return 0;
422 }
423
424 /*
425 * The inverse routine to ether3_open().
426 */
427 static int
428 ether3_close(struct net_device *dev)
429 {
430 netif_stop_queue(dev);
431
432 disable_irq(dev->irq);
433
434 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
435 priv(dev)->regs.command = 0;
436 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
437 barrier();
438 ether3_outb(0x80, REG_CONFIG2 + 4);
439 ether3_outw(0, REG_COMMAND);
440
441 free_irq(dev->irq, dev);
442
443 return 0;
444 }
445
446 /*
447 * Get the current statistics. This may be called with the card open or
448 * closed.
449 */
450 static struct net_device_stats *ether3_getstats(struct net_device *dev)
451 {
452 return &priv(dev)->stats;
453 }
454
455 /*
456 * Set or clear promiscuous/multicast mode filter for this adaptor.
457 *
458 * We don't attempt any packet filtering. The card may have a SEEQ 8004
459 * in which does not have the other ethernet address registers present...
460 */
461 static void ether3_setmulticastlist(struct net_device *dev)
462 {
463 priv(dev)->regs.config1 &= ~CFG1_RECVPROMISC;
464
465 if (dev->flags & IFF_PROMISC) {
466 /* promiscuous mode */
467 priv(dev)->regs.config1 |= CFG1_RECVPROMISC;
468 } else if (dev->flags & IFF_ALLMULTI) {
469 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI;
470 } else
471 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD;
472
473 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
474 }
475
476 static void ether3_timeout(struct net_device *dev)
477 {
478 unsigned long flags;
479
480 del_timer(&priv(dev)->timer);
481
482 local_irq_save(flags);
483 printk(KERN_ERR "%s: transmit timed out, network cable problem?\n", dev->name);
484 printk(KERN_ERR "%s: state: { status=%04X cfg1=%04X cfg2=%04X }\n", dev->name,
485 ether3_inw(REG_STATUS), ether3_inw(REG_CONFIG1), ether3_inw(REG_CONFIG2));
486 printk(KERN_ERR "%s: { rpr=%04X rea=%04X tpr=%04X }\n", dev->name,
487 ether3_inw(REG_RECVPTR), ether3_inw(REG_RECVEND), ether3_inw(REG_TRANSMITPTR));
488 printk(KERN_ERR "%s: tx head=%X tx tail=%X\n", dev->name,
489 priv(dev)->tx_head, priv(dev)->tx_tail);
490 ether3_setbuffer(dev, buffer_read, priv(dev)->tx_tail);
491 printk(KERN_ERR "%s: packet status = %08X\n", dev->name, ether3_readlong(dev));
492 local_irq_restore(flags);
493
494 priv(dev)->regs.config2 |= CFG2_CTRLO;
495 priv(dev)->stats.tx_errors += 1;
496 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
497 priv(dev)->tx_head = priv(dev)->tx_tail = 0;
498
499 netif_wake_queue(dev);
500 }
501
502 /*
503 * Transmit a packet
504 */
505 static int
506 ether3_sendpacket(struct sk_buff *skb, struct net_device *dev)
507 {
508 unsigned long flags;
509 unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
510 unsigned int ptr, next_ptr;
511
512 if (priv(dev)->broken) {
513 dev_kfree_skb(skb);
514 priv(dev)->stats.tx_dropped ++;
515 netif_start_queue(dev);
516 return 0;
517 }
518
519 length = (length + 1) & ~1;
520 if (length != skb->len) {
521 if (skb_padto(skb, length))
522 goto out;
523 }
524
525 next_ptr = (priv(dev)->tx_head + 1) & 15;
526
527 local_irq_save(flags);
528
529 if (priv(dev)->tx_tail == next_ptr) {
530 local_irq_restore(flags);
531 return 1; /* unable to queue */
532 }
533
534 dev->trans_start = jiffies;
535 ptr = 0x600 * priv(dev)->tx_head;
536 priv(dev)->tx_head = next_ptr;
537 next_ptr *= 0x600;
538
539 #define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS)
540
541 ether3_setbuffer(dev, buffer_write, next_ptr);
542 ether3_writelong(dev, 0);
543 ether3_setbuffer(dev, buffer_write, ptr);
544 ether3_writelong(dev, 0);
545 ether3_writebuffer(dev, skb->data, length);
546 ether3_writeword(dev, htons(next_ptr));
547 ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16);
548 ether3_setbuffer(dev, buffer_write, ptr);
549 ether3_writeword(dev, htons((ptr + length + 4)));
550 ether3_writeword(dev, TXHDR_FLAGS >> 16);
551 ether3_ledon(dev);
552
553 if (!(ether3_inw(REG_STATUS) & STAT_TXON)) {
554 ether3_outw(ptr, REG_TRANSMITPTR);
555 ether3_outw(priv(dev)->regs.command | CMD_TXON, REG_COMMAND);
556 }
557
558 next_ptr = (priv(dev)->tx_head + 1) & 15;
559 local_irq_restore(flags);
560
561 dev_kfree_skb(skb);
562
563 if (priv(dev)->tx_tail == next_ptr)
564 netif_stop_queue(dev);
565
566 out:
567 return 0;
568 }
569
570 static irqreturn_t
571 ether3_interrupt(int irq, void *dev_id)
572 {
573 struct net_device *dev = (struct net_device *)dev_id;
574 unsigned int status, handled = IRQ_NONE;
575
576 #if NET_DEBUG > 1
577 if(net_debug & DEBUG_INT)
578 printk("eth3irq: %d ", irq);
579 #endif
580
581 status = ether3_inw(REG_STATUS);
582
583 if (status & STAT_INTRX) {
584 ether3_outw(CMD_ACKINTRX | priv(dev)->regs.command, REG_COMMAND);
585 ether3_rx(dev, 12);
586 handled = IRQ_HANDLED;
587 }
588
589 if (status & STAT_INTTX) {
590 ether3_outw(CMD_ACKINTTX | priv(dev)->regs.command, REG_COMMAND);
591 ether3_tx(dev);
592 handled = IRQ_HANDLED;
593 }
594
595 #if NET_DEBUG > 1
596 if(net_debug & DEBUG_INT)
597 printk("done\n");
598 #endif
599 return handled;
600 }
601
602 /*
603 * If we have a good packet(s), get it/them out of the buffers.
604 */
605 static int ether3_rx(struct net_device *dev, unsigned int maxcnt)
606 {
607 unsigned int next_ptr = priv(dev)->rx_head, received = 0;
608
609 ether3_ledon(dev);
610
611 do {
612 unsigned int this_ptr, status;
613 unsigned char addrs[16];
614
615 /*
616 * read the first 16 bytes from the buffer.
617 * This contains the status bytes etc and ethernet addresses,
618 * and we also check the source ethernet address to see if
619 * it originated from us.
620 */
621 {
622 unsigned int temp_ptr;
623 ether3_setbuffer(dev, buffer_read, next_ptr);
624 temp_ptr = ether3_readword(dev);
625 status = ether3_readword(dev);
626 if ((status & (RXSTAT_DONE | RXHDR_CHAINCONTINUE | RXHDR_RECEIVE)) !=
627 (RXSTAT_DONE | RXHDR_CHAINCONTINUE) || !temp_ptr)
628 break;
629
630 this_ptr = next_ptr + 4;
631 next_ptr = ntohs(temp_ptr);
632 }
633 ether3_setbuffer(dev, buffer_read, this_ptr);
634 ether3_readbuffer(dev, addrs+2, 12);
635
636 if (next_ptr < RX_START || next_ptr >= RX_END) {
637 int i;
638 printk("%s: bad next pointer @%04X: ", dev->name, priv(dev)->rx_head);
639 printk("%02X %02X %02X %02X ", next_ptr >> 8, next_ptr & 255, status & 255, status >> 8);
640 for (i = 2; i < 14; i++)
641 printk("%02X ", addrs[i]);
642 printk("\n");
643 next_ptr = priv(dev)->rx_head;
644 break;
645 }
646 /*
647 * ignore our own packets...
648 */
649 if (!(*(unsigned long *)&dev->dev_addr[0] ^ *(unsigned long *)&addrs[2+6]) &&
650 !(*(unsigned short *)&dev->dev_addr[4] ^ *(unsigned short *)&addrs[2+10])) {
651 maxcnt ++; /* compensate for loopedback packet */
652 ether3_outw(next_ptr >> 8, REG_RECVEND);
653 } else
654 if (!(status & (RXSTAT_OVERSIZE|RXSTAT_CRCERROR|RXSTAT_DRIBBLEERROR|RXSTAT_SHORTPACKET))) {
655 unsigned int length = next_ptr - this_ptr;
656 struct sk_buff *skb;
657
658 if (next_ptr <= this_ptr)
659 length += RX_END - RX_START;
660
661 skb = dev_alloc_skb(length + 2);
662 if (skb) {
663 unsigned char *buf;
664
665 skb->dev = dev;
666 skb_reserve(skb, 2);
667 buf = skb_put(skb, length);
668 ether3_readbuffer(dev, buf + 12, length - 12);
669 ether3_outw(next_ptr >> 8, REG_RECVEND);
670 *(unsigned short *)(buf + 0) = *(unsigned short *)(addrs + 2);
671 *(unsigned long *)(buf + 2) = *(unsigned long *)(addrs + 4);
672 *(unsigned long *)(buf + 6) = *(unsigned long *)(addrs + 8);
673 *(unsigned short *)(buf + 10) = *(unsigned short *)(addrs + 12);
674 skb->protocol = eth_type_trans(skb, dev);
675 netif_rx(skb);
676 received ++;
677 } else
678 goto dropping;
679 } else {
680 struct net_device_stats *stats = &priv(dev)->stats;
681 ether3_outw(next_ptr >> 8, REG_RECVEND);
682 if (status & RXSTAT_OVERSIZE) stats->rx_over_errors ++;
683 if (status & RXSTAT_CRCERROR) stats->rx_crc_errors ++;
684 if (status & RXSTAT_DRIBBLEERROR) stats->rx_fifo_errors ++;
685 if (status & RXSTAT_SHORTPACKET) stats->rx_length_errors ++;
686 stats->rx_errors++;
687 }
688 }
689 while (-- maxcnt);
690
691 done:
692 priv(dev)->stats.rx_packets += received;
693 priv(dev)->rx_head = next_ptr;
694 /*
695 * If rx went off line, then that means that the buffer may be full. We
696 * have dropped at least one packet.
697 */
698 if (!(ether3_inw(REG_STATUS) & STAT_RXON)) {
699 priv(dev)->stats.rx_dropped ++;
700 ether3_outw(next_ptr, REG_RECVPTR);
701 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND);
702 }
703
704 return maxcnt;
705
706 dropping:{
707 static unsigned long last_warned;
708
709 ether3_outw(next_ptr >> 8, REG_RECVEND);
710 /*
711 * Don't print this message too many times...
712 */
713 if (time_after(jiffies, last_warned + 10 * HZ)) {
714 last_warned = jiffies;
715 printk("%s: memory squeeze, dropping packet.\n", dev->name);
716 }
717 priv(dev)->stats.rx_dropped ++;
718 goto done;
719 }
720 }
721
722 /*
723 * Update stats for the transmitted packet(s)
724 */
725 static void ether3_tx(struct net_device *dev)
726 {
727 unsigned int tx_tail = priv(dev)->tx_tail;
728 int max_work = 14;
729
730 do {
731 unsigned long status;
732
733 /*
734 * Read the packet header
735 */
736 ether3_setbuffer(dev, buffer_read, tx_tail * 0x600);
737 status = ether3_readlong(dev);
738
739 /*
740 * Check to see if this packet has been transmitted
741 */
742 if ((status & (TXSTAT_DONE | TXHDR_TRANSMIT)) !=
743 (TXSTAT_DONE | TXHDR_TRANSMIT))
744 break;
745
746 /*
747 * Update errors
748 */
749 if (!(status & (TXSTAT_BABBLED | TXSTAT_16COLLISIONS)))
750 priv(dev)->stats.tx_packets++;
751 else {
752 priv(dev)->stats.tx_errors ++;
753 if (status & TXSTAT_16COLLISIONS)
754 priv(dev)->stats.collisions += 16;
755 if (status & TXSTAT_BABBLED)
756 priv(dev)->stats.tx_fifo_errors ++;
757 }
758
759 tx_tail = (tx_tail + 1) & 15;
760 } while (--max_work);
761
762 if (priv(dev)->tx_tail != tx_tail) {
763 priv(dev)->tx_tail = tx_tail;
764 netif_wake_queue(dev);
765 }
766 }
767
768 static void __init ether3_banner(void)
769 {
770 static unsigned version_printed = 0;
771
772 if (net_debug && version_printed++ == 0)
773 printk(KERN_INFO "%s", version);
774 }
775
776 static int __devinit
777 ether3_probe(struct expansion_card *ec, const struct ecard_id *id)
778 {
779 const struct ether3_data *data = id->data;
780 struct net_device *dev;
781 int i, bus_type, ret;
782
783 ether3_banner();
784
785 ret = ecard_request_resources(ec);
786 if (ret)
787 goto out;
788
789 dev = alloc_etherdev(sizeof(struct dev_priv));
790 if (!dev) {
791 ret = -ENOMEM;
792 goto release;
793 }
794
795 SET_MODULE_OWNER(dev);
796 SET_NETDEV_DEV(dev, &ec->dev);
797
798 priv(dev)->base = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
799 ecard_resource_len(ec, ECARD_RES_MEMC));
800 if (!priv(dev)->base) {
801 ret = -ENOMEM;
802 goto free;
803 }
804
805 ec->irqaddr = priv(dev)->base + data->base_offset;
806 ec->irqmask = 0xf0;
807
808 priv(dev)->seeq = priv(dev)->base + data->base_offset;
809 dev->irq = ec->irq;
810
811 ether3_addr(dev->dev_addr, ec);
812
813 init_timer(&priv(dev)->timer);
814
815 /* Reset card...
816 */
817 ether3_outb(0x80, REG_CONFIG2 + 4);
818 bus_type = BUS_UNKNOWN;
819 udelay(4);
820
821 /* Test using Receive Pointer (16-bit register) to find out
822 * how the ether3 is connected to the bus...
823 */
824 if (ether3_probe_bus_8(dev, 0x100) &&
825 ether3_probe_bus_8(dev, 0x201))
826 bus_type = BUS_8;
827
828 if (bus_type == BUS_UNKNOWN &&
829 ether3_probe_bus_16(dev, 0x101) &&
830 ether3_probe_bus_16(dev, 0x201))
831 bus_type = BUS_16;
832
833 switch (bus_type) {
834 case BUS_UNKNOWN:
835 printk(KERN_ERR "%s: unable to identify bus width\n", dev->name);
836 ret = -ENODEV;
837 goto free;
838
839 case BUS_8:
840 printk(KERN_ERR "%s: %s found, but is an unsupported "
841 "8-bit card\n", dev->name, data->name);
842 ret = -ENODEV;
843 goto free;
844
845 default:
846 break;
847 }
848
849 if (ether3_init_2(dev)) {
850 ret = -ENODEV;
851 goto free;
852 }
853
854 dev->open = ether3_open;
855 dev->stop = ether3_close;
856 dev->hard_start_xmit = ether3_sendpacket;
857 dev->get_stats = ether3_getstats;
858 dev->set_multicast_list = ether3_setmulticastlist;
859 dev->tx_timeout = ether3_timeout;
860 dev->watchdog_timeo = 5 * HZ / 100;
861
862 ret = register_netdev(dev);
863 if (ret)
864 goto free;
865
866 printk("%s: %s in slot %d, ", dev->name, data->name, ec->slot_no);
867 for (i = 0; i < 6; i++)
868 printk("%2.2x%c", dev->dev_addr[i], i == 5 ? '\n' : ':');
869
870 ecard_set_drvdata(ec, dev);
871 return 0;
872
873 free:
874 if (priv(dev)->base)
875 iounmap(priv(dev)->base);
876 free_netdev(dev);
877 release:
878 ecard_release_resources(ec);
879 out:
880 return ret;
881 }
882
883 static void __devexit ether3_remove(struct expansion_card *ec)
884 {
885 struct net_device *dev = ecard_get_drvdata(ec);
886
887 ecard_set_drvdata(ec, NULL);
888
889 unregister_netdev(dev);
890 iounmap(priv(dev)->base);
891 free_netdev(dev);
892 ecard_release_resources(ec);
893 }
894
895 static struct ether3_data ether3 = {
896 .name = "ether3",
897 .base_offset = 0,
898 };
899
900 static struct ether3_data etherb = {
901 .name = "etherb",
902 .base_offset = 0x800,
903 };
904
905 static const struct ecard_id ether3_ids[] = {
906 { MANU_ANT2, PROD_ANT_ETHER3, &ether3 },
907 { MANU_ANT, PROD_ANT_ETHER3, &ether3 },
908 { MANU_ANT, PROD_ANT_ETHERB, &etherb },
909 { 0xffff, 0xffff }
910 };
911
912 static struct ecard_driver ether3_driver = {
913 .probe = ether3_probe,
914 .remove = __devexit_p(ether3_remove),
915 .id_table = ether3_ids,
916 .drv = {
917 .name = "ether3",
918 },
919 };
920
921 static int __init ether3_init(void)
922 {
923 return ecard_register_driver(&ether3_driver);
924 }
925
926 static void __exit ether3_exit(void)
927 {
928 ecard_remove_driver(&ether3_driver);
929 }
930
931 module_init(ether3_init);
932 module_exit(ether3_exit);
933
934 MODULE_LICENSE("GPL");
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