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[TG3]: Set minimal hw interrupt mitigation.
[linux-2.6/verdex.git] / drivers / net / arm / ether3.c
blob1cc53abc3a3900a4f9b6b6dbabb839db43f679c8
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 #include <asm/irq.h>
73
74 static char version[] __initdata = "ether3 ethernet driver (c) 1995-2000 R.M.King v1.17\n";
75
76 #include "ether3.h"
77
78 static unsigned int net_debug = NET_DEBUG;
79
80 static void ether3_setmulticastlist(struct net_device *dev);
81 static int ether3_rx(struct net_device *dev, unsigned int maxcnt);
82 static void ether3_tx(struct net_device *dev);
83 static int ether3_open (struct net_device *dev);
84 static int ether3_sendpacket (struct sk_buff *skb, struct net_device *dev);
85 static irqreturn_t ether3_interrupt (int irq, void *dev_id, struct pt_regs *regs);
86 static int ether3_close (struct net_device *dev);
87 static struct net_device_stats *ether3_getstats (struct net_device *dev);
88 static void ether3_setmulticastlist (struct net_device *dev);
89 static void ether3_timeout(struct net_device *dev);
90
91 #define BUS_16 2
92 #define BUS_8 1
93 #define BUS_UNKNOWN 0
94
95 /* --------------------------------------------------------------------------- */
96
97 typedef enum {
98 buffer_write,
99 buffer_read
100 } buffer_rw_t;
101
102 /*
103 * ether3 read/write. Slow things down a bit...
104 * The SEEQ8005 doesn't like us writing to its registers
105 * too quickly.
106 */
107 static inline void ether3_outb(int v, const void __iomem *r)
108 {
109 writeb(v, r);
110 udelay(1);
111 }
112
113 static inline void ether3_outw(int v, const void __iomem *r)
114 {
115 writew(v, r);
116 udelay(1);
117 }
118 #define ether3_inb(r) ({ unsigned int __v = readb((r)); udelay(1); __v; })
119 #define ether3_inw(r) ({ unsigned int __v = readw((r)); udelay(1); __v; })
120
121 static int
122 ether3_setbuffer(struct net_device *dev, buffer_rw_t read, int start)
123 {
124 int timeout = 1000;
125
126 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
127 ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
128
129 while ((ether3_inw(REG_STATUS) & STAT_FIFOEMPTY) == 0) {
130 if (!timeout--) {
131 printk("%s: setbuffer broken\n", dev->name);
132 priv(dev)->broken = 1;
133 return 1;
134 }
135 udelay(1);
136 }
137
138 if (read == buffer_read) {
139 ether3_outw(start, REG_DMAADDR);
140 ether3_outw(priv(dev)->regs.command | CMD_FIFOREAD, REG_COMMAND);
141 } else {
142 ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
143 ether3_outw(start, REG_DMAADDR);
144 }
145 return 0;
146 }
147
148 /*
149 * write data to the buffer memory
150 */
151 #define ether3_writebuffer(dev,data,length) \
152 writesw(REG_BUFWIN, (data), (length) >> 1)
153
154 #define ether3_writeword(dev,data) \
155 writew((data), REG_BUFWIN)
156
157 #define ether3_writelong(dev,data) { \
158 void __iomem *reg_bufwin = REG_BUFWIN; \
159 writew((data), reg_bufwin); \
160 writew((data) >> 16, reg_bufwin); \
161 }
162
163 /*
164 * read data from the buffer memory
165 */
166 #define ether3_readbuffer(dev,data,length) \
167 readsw(REG_BUFWIN, (data), (length) >> 1)
168
169 #define ether3_readword(dev) \
170 readw(REG_BUFWIN)
171
172 #define ether3_readlong(dev) \
173 readw(REG_BUFWIN) | (readw(REG_BUFWIN) << 16)
174
175 /*
176 * Switch LED off...
177 */
178 static void ether3_ledoff(unsigned long data)
179 {
180 struct net_device *dev = (struct net_device *)data;
181 ether3_outw(priv(dev)->regs.config2 |= CFG2_CTRLO, REG_CONFIG2);
182 }
183
184 /*
185 * switch LED on...
186 */
187 static inline void ether3_ledon(struct net_device *dev)
188 {
189 del_timer(&priv(dev)->timer);
190 priv(dev)->timer.expires = jiffies + HZ / 50; /* leave on for 1/50th second */
191 priv(dev)->timer.data = (unsigned long)dev;
192 priv(dev)->timer.function = ether3_ledoff;
193 add_timer(&priv(dev)->timer);
194 if (priv(dev)->regs.config2 & CFG2_CTRLO)
195 ether3_outw(priv(dev)->regs.config2 &= ~CFG2_CTRLO, REG_CONFIG2);
196 }
197
198 /*
199 * Read the ethernet address string from the on board rom.
200 * This is an ascii string!!!
201 */
202 static int __init
203 ether3_addr(char *addr, struct expansion_card *ec)
204 {
205 struct in_chunk_dir cd;
206 char *s;
207
208 if (ecard_readchunk(&cd, ec, 0xf5, 0) && (s = strchr(cd.d.string, '('))) {
209 int i;
210 for (i = 0; i<6; i++) {
211 addr[i] = simple_strtoul(s + 1, &s, 0x10);
212 if (*s != (i==5?')' : ':' ))
213 break;
214 }
215 if (i == 6)
216 return 0;
217 }
218 /* I wonder if we should even let the user continue in this case
219 * - no, it would be better to disable the device
220 */
221 printk(KERN_ERR "ether3: Couldn't read a valid MAC address from card.\n");
222 return -ENODEV;
223 }
224
225 /* --------------------------------------------------------------------------- */
226
227 static int __init
228 ether3_ramtest(struct net_device *dev, unsigned char byte)
229 {
230 unsigned char *buffer = kmalloc(RX_END, GFP_KERNEL);
231 int i,ret = 0;
232 int max_errors = 4;
233 int bad = -1;
234
235 if (!buffer)
236 return 1;
237
238 memset(buffer, byte, RX_END);
239 ether3_setbuffer(dev, buffer_write, 0);
240 ether3_writebuffer(dev, buffer, TX_END);
241 ether3_setbuffer(dev, buffer_write, RX_START);
242 ether3_writebuffer(dev, buffer + RX_START, RX_LEN);
243 memset(buffer, byte ^ 0xff, RX_END);
244 ether3_setbuffer(dev, buffer_read, 0);
245 ether3_readbuffer(dev, buffer, TX_END);
246 ether3_setbuffer(dev, buffer_read, RX_START);
247 ether3_readbuffer(dev, buffer + RX_START, RX_LEN);
248
249 for (i = 0; i < RX_END; i++) {
250 if (buffer[i] != byte) {
251 if (max_errors > 0 && bad != buffer[i]) {
252 printk("%s: RAM failed with (%02X instead of %02X) at 0x%04X",
253 dev->name, buffer[i], byte, i);
254 ret = 2;
255 max_errors--;
256 bad = i;
257 }
258 } else {
259 if (bad != -1) {
260 if (bad != i - 1)
261 printk(" - 0x%04X\n", i - 1);
262 printk("\n");
263 bad = -1;
264 }
265 }
266 }
267 if (bad != -1)
268 printk(" - 0xffff\n");
269 kfree(buffer);
270
271 return ret;
272 }
273
274 /* ------------------------------------------------------------------------------- */
275
276 static int __init ether3_init_2(struct net_device *dev)
277 {
278 int i;
279
280 priv(dev)->regs.config1 = CFG1_RECVCOMPSTAT0|CFG1_DMABURST8;
281 priv(dev)->regs.config2 = CFG2_CTRLO|CFG2_RECVCRC|CFG2_ERRENCRC;
282 priv(dev)->regs.command = 0;
283
284 /*
285 * Set up our hardware address
286 */
287 ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
288 for (i = 0; i < 6; i++)
289 ether3_outb(dev->dev_addr[i], REG_BUFWIN);
290
291 if (dev->flags & IFF_PROMISC)
292 priv(dev)->regs.config1 |= CFG1_RECVPROMISC;
293 else if (dev->flags & IFF_MULTICAST)
294 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI;
295 else
296 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD;
297
298 /*
299 * There is a problem with the NQ8005 in that it occasionally loses the
300 * last two bytes. To get round this problem, we receive the CRC as
301 * well. That way, if we do lose the last two, then it doesn't matter.
302 */
303 ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
304 ether3_outw((TX_END>>8) - 1, REG_BUFWIN);
305 ether3_outw(priv(dev)->rx_head, REG_RECVPTR);
306 ether3_outw(0, REG_TRANSMITPTR);
307 ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND);
308 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
309 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
310 ether3_outw(priv(dev)->regs.command, REG_COMMAND);
311
312 i = ether3_ramtest(dev, 0x5A);
313 if(i)
314 return i;
315 i = ether3_ramtest(dev, 0x1E);
316 if(i)
317 return i;
318
319 ether3_setbuffer(dev, buffer_write, 0);
320 ether3_writelong(dev, 0);
321 return 0;
322 }
323
324 static void
325 ether3_init_for_open(struct net_device *dev)
326 {
327 int i;
328
329 memset(&priv(dev)->stats, 0, sizeof(struct net_device_stats));
330
331 /* Reset the chip */
332 ether3_outw(CFG2_RESET, REG_CONFIG2);
333 udelay(4);
334
335 priv(dev)->regs.command = 0;
336 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
337 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
338 barrier();
339
340 ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
341 for (i = 0; i < 6; i++)
342 ether3_outb(dev->dev_addr[i], REG_BUFWIN);
343
344 priv(dev)->tx_head = 0;
345 priv(dev)->tx_tail = 0;
346 priv(dev)->regs.config2 |= CFG2_CTRLO;
347 priv(dev)->rx_head = RX_START;
348
349 ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
350 ether3_outw((TX_END>>8) - 1, REG_BUFWIN);
351 ether3_outw(priv(dev)->rx_head, REG_RECVPTR);
352 ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND);
353 ether3_outw(0, REG_TRANSMITPTR);
354 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
355 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
356
357 ether3_setbuffer(dev, buffer_write, 0);
358 ether3_writelong(dev, 0);
359
360 priv(dev)->regs.command = CMD_ENINTRX | CMD_ENINTTX;
361 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND);
362 }
363
364 static inline int
365 ether3_probe_bus_8(struct net_device *dev, int val)
366 {
367 int write_low, write_high, read_low, read_high;
368
369 write_low = val & 255;
370 write_high = val >> 8;
371
372 printk(KERN_DEBUG "ether3_probe: write8 [%02X:%02X]", write_high, write_low);
373
374 ether3_outb(write_low, REG_RECVPTR);
375 ether3_outb(write_high, REG_RECVPTR + 4);
376
377 read_low = ether3_inb(REG_RECVPTR);
378 read_high = ether3_inb(REG_RECVPTR + 4);
379
380 printk(", read8 [%02X:%02X]\n", read_high, read_low);
381
382 return read_low == write_low && read_high == write_high;
383 }
384
385 static inline int
386 ether3_probe_bus_16(struct net_device *dev, int val)
387 {
388 int read_val;
389
390 ether3_outw(val, REG_RECVPTR);
391 read_val = ether3_inw(REG_RECVPTR);
392
393 printk(KERN_DEBUG "ether3_probe: write16 [%04X], read16 [%04X]\n", val, read_val);
394
395 return read_val == val;
396 }
397
398 /*
399 * Open/initialize the board. This is called (in the current kernel)
400 * sometime after booting when the 'ifconfig' program is run.
401 *
402 * This routine should set everything up anew at each open, even
403 * registers that "should" only need to be set once at boot, so that
404 * there is non-reboot way to recover if something goes wrong.
405 */
406 static int
407 ether3_open(struct net_device *dev)
408 {
409 if (!is_valid_ether_addr(dev->dev_addr)) {
410 printk(KERN_WARNING "%s: invalid ethernet MAC address\n",
411 dev->name);
412 return -EINVAL;
413 }
414
415 if (request_irq(dev->irq, ether3_interrupt, 0, "ether3", dev))
416 return -EAGAIN;
417
418 ether3_init_for_open(dev);
419
420 netif_start_queue(dev);
421
422 return 0;
423 }
424
425 /*
426 * The inverse routine to ether3_open().
427 */
428 static int
429 ether3_close(struct net_device *dev)
430 {
431 netif_stop_queue(dev);
432
433 disable_irq(dev->irq);
434
435 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
436 priv(dev)->regs.command = 0;
437 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
438 barrier();
439 ether3_outb(0x80, REG_CONFIG2 + 4);
440 ether3_outw(0, REG_COMMAND);
441
442 free_irq(dev->irq, dev);
443
444 return 0;
445 }
446
447 /*
448 * Get the current statistics. This may be called with the card open or
449 * closed.
450 */
451 static struct net_device_stats *ether3_getstats(struct net_device *dev)
452 {
453 return &priv(dev)->stats;
454 }
455
456 /*
457 * Set or clear promiscuous/multicast mode filter for this adaptor.
458 *
459 * We don't attempt any packet filtering. The card may have a SEEQ 8004
460 * in which does not have the other ethernet address registers present...
461 */
462 static void ether3_setmulticastlist(struct net_device *dev)
463 {
464 priv(dev)->regs.config1 &= ~CFG1_RECVPROMISC;
465
466 if (dev->flags & IFF_PROMISC) {
467 /* promiscuous mode */
468 priv(dev)->regs.config1 |= CFG1_RECVPROMISC;
469 } else if (dev->flags & IFF_ALLMULTI) {
470 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI;
471 } else
472 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD;
473
474 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
475 }
476
477 static void ether3_timeout(struct net_device *dev)
478 {
479 unsigned long flags;
480
481 del_timer(&priv(dev)->timer);
482
483 local_irq_save(flags);
484 printk(KERN_ERR "%s: transmit timed out, network cable problem?\n", dev->name);
485 printk(KERN_ERR "%s: state: { status=%04X cfg1=%04X cfg2=%04X }\n", dev->name,
486 ether3_inw(REG_STATUS), ether3_inw(REG_CONFIG1), ether3_inw(REG_CONFIG2));
487 printk(KERN_ERR "%s: { rpr=%04X rea=%04X tpr=%04X }\n", dev->name,
488 ether3_inw(REG_RECVPTR), ether3_inw(REG_RECVEND), ether3_inw(REG_TRANSMITPTR));
489 printk(KERN_ERR "%s: tx head=%X tx tail=%X\n", dev->name,
490 priv(dev)->tx_head, priv(dev)->tx_tail);
491 ether3_setbuffer(dev, buffer_read, priv(dev)->tx_tail);
492 printk(KERN_ERR "%s: packet status = %08X\n", dev->name, ether3_readlong(dev));
493 local_irq_restore(flags);
494
495 priv(dev)->regs.config2 |= CFG2_CTRLO;
496 priv(dev)->stats.tx_errors += 1;
497 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
498 priv(dev)->tx_head = priv(dev)->tx_tail = 0;
499
500 netif_wake_queue(dev);
501 }
502
503 /*
504 * Transmit a packet
505 */
506 static int
507 ether3_sendpacket(struct sk_buff *skb, struct net_device *dev)
508 {
509 unsigned long flags;
510 unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
511 unsigned int ptr, next_ptr;
512
513 if (priv(dev)->broken) {
514 dev_kfree_skb(skb);
515 priv(dev)->stats.tx_dropped ++;
516 netif_start_queue(dev);
517 return 0;
518 }
519
520 length = (length + 1) & ~1;
521 if (length != skb->len) {
522 skb = skb_padto(skb, length);
523 if (skb == NULL)
524 goto out;
525 }
526
527 next_ptr = (priv(dev)->tx_head + 1) & 15;
528
529 local_irq_save(flags);
530
531 if (priv(dev)->tx_tail == next_ptr) {
532 local_irq_restore(flags);
533 return 1; /* unable to queue */
534 }
535
536 dev->trans_start = jiffies;
537 ptr = 0x600 * priv(dev)->tx_head;
538 priv(dev)->tx_head = next_ptr;
539 next_ptr *= 0x600;
540
541 #define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS)
542
543 ether3_setbuffer(dev, buffer_write, next_ptr);
544 ether3_writelong(dev, 0);
545 ether3_setbuffer(dev, buffer_write, ptr);
546 ether3_writelong(dev, 0);
547 ether3_writebuffer(dev, skb->data, length);
548 ether3_writeword(dev, htons(next_ptr));
549 ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16);
550 ether3_setbuffer(dev, buffer_write, ptr);
551 ether3_writeword(dev, htons((ptr + length + 4)));
552 ether3_writeword(dev, TXHDR_FLAGS >> 16);
553 ether3_ledon(dev);
554
555 if (!(ether3_inw(REG_STATUS) & STAT_TXON)) {
556 ether3_outw(ptr, REG_TRANSMITPTR);
557 ether3_outw(priv(dev)->regs.command | CMD_TXON, REG_COMMAND);
558 }
559
560 next_ptr = (priv(dev)->tx_head + 1) & 15;
561 local_irq_restore(flags);
562
563 dev_kfree_skb(skb);
564
565 if (priv(dev)->tx_tail == next_ptr)
566 netif_stop_queue(dev);
567
568 out:
569 return 0;
570 }
571
572 static irqreturn_t
573 ether3_interrupt(int irq, void *dev_id, struct pt_regs *regs)
574 {
575 struct net_device *dev = (struct net_device *)dev_id;
576 unsigned int status, handled = IRQ_NONE;
577
578 #if NET_DEBUG > 1
579 if(net_debug & DEBUG_INT)
580 printk("eth3irq: %d ", irq);
581 #endif
582
583 status = ether3_inw(REG_STATUS);
584
585 if (status & STAT_INTRX) {
586 ether3_outw(CMD_ACKINTRX | priv(dev)->regs.command, REG_COMMAND);
587 ether3_rx(dev, 12);
588 handled = IRQ_HANDLED;
589 }
590
591 if (status & STAT_INTTX) {
592 ether3_outw(CMD_ACKINTTX | priv(dev)->regs.command, REG_COMMAND);
593 ether3_tx(dev);
594 handled = IRQ_HANDLED;
595 }
596
597 #if NET_DEBUG > 1
598 if(net_debug & DEBUG_INT)
599 printk("done\n");
600 #endif
601 return handled;
602 }
603
604 /*
605 * If we have a good packet(s), get it/them out of the buffers.
606 */
607 static int ether3_rx(struct net_device *dev, unsigned int maxcnt)
608 {
609 unsigned int next_ptr = priv(dev)->rx_head, received = 0;
610
611 ether3_ledon(dev);
612
613 do {
614 unsigned int this_ptr, status;
615 unsigned char addrs[16];
616
617 /*
618 * read the first 16 bytes from the buffer.
619 * This contains the status bytes etc and ethernet addresses,
620 * and we also check the source ethernet address to see if
621 * it originated from us.
622 */
623 {
624 unsigned int temp_ptr;
625 ether3_setbuffer(dev, buffer_read, next_ptr);
626 temp_ptr = ether3_readword(dev);
627 status = ether3_readword(dev);
628 if ((status & (RXSTAT_DONE | RXHDR_CHAINCONTINUE | RXHDR_RECEIVE)) !=
629 (RXSTAT_DONE | RXHDR_CHAINCONTINUE) || !temp_ptr)
630 break;
631
632 this_ptr = next_ptr + 4;
633 next_ptr = ntohs(temp_ptr);
634 }
635 ether3_setbuffer(dev, buffer_read, this_ptr);
636 ether3_readbuffer(dev, addrs+2, 12);
637
638 if (next_ptr < RX_START || next_ptr >= RX_END) {
639 int i;
640 printk("%s: bad next pointer @%04X: ", dev->name, priv(dev)->rx_head);
641 printk("%02X %02X %02X %02X ", next_ptr >> 8, next_ptr & 255, status & 255, status >> 8);
642 for (i = 2; i < 14; i++)
643 printk("%02X ", addrs[i]);
644 printk("\n");
645 next_ptr = priv(dev)->rx_head;
646 break;
647 }
648 /*
649 * ignore our own packets...
650 */
651 if (!(*(unsigned long *)&dev->dev_addr[0] ^ *(unsigned long *)&addrs[2+6]) &&
652 !(*(unsigned short *)&dev->dev_addr[4] ^ *(unsigned short *)&addrs[2+10])) {
653 maxcnt ++; /* compensate for loopedback packet */
654 ether3_outw(next_ptr >> 8, REG_RECVEND);
655 } else
656 if (!(status & (RXSTAT_OVERSIZE|RXSTAT_CRCERROR|RXSTAT_DRIBBLEERROR|RXSTAT_SHORTPACKET))) {
657 unsigned int length = next_ptr - this_ptr;
658 struct sk_buff *skb;
659
660 if (next_ptr <= this_ptr)
661 length += RX_END - RX_START;
662
663 skb = dev_alloc_skb(length + 2);
664 if (skb) {
665 unsigned char *buf;
666
667 skb->dev = dev;
668 skb_reserve(skb, 2);
669 buf = skb_put(skb, length);
670 ether3_readbuffer(dev, buf + 12, length - 12);
671 ether3_outw(next_ptr >> 8, REG_RECVEND);
672 *(unsigned short *)(buf + 0) = *(unsigned short *)(addrs + 2);
673 *(unsigned long *)(buf + 2) = *(unsigned long *)(addrs + 4);
674 *(unsigned long *)(buf + 6) = *(unsigned long *)(addrs + 8);
675 *(unsigned short *)(buf + 10) = *(unsigned short *)(addrs + 12);
676 skb->protocol = eth_type_trans(skb, dev);
677 netif_rx(skb);
678 received ++;
679 } else
680 goto dropping;
681 } else {
682 struct net_device_stats *stats = &priv(dev)->stats;
683 ether3_outw(next_ptr >> 8, REG_RECVEND);
684 if (status & RXSTAT_OVERSIZE) stats->rx_over_errors ++;
685 if (status & RXSTAT_CRCERROR) stats->rx_crc_errors ++;
686 if (status & RXSTAT_DRIBBLEERROR) stats->rx_fifo_errors ++;
687 if (status & RXSTAT_SHORTPACKET) stats->rx_length_errors ++;
688 stats->rx_errors++;
689 }
690 }
691 while (-- maxcnt);
692
693 done:
694 priv(dev)->stats.rx_packets += received;
695 priv(dev)->rx_head = next_ptr;
696 /*
697 * If rx went off line, then that means that the buffer may be full. We
698 * have dropped at least one packet.
699 */
700 if (!(ether3_inw(REG_STATUS) & STAT_RXON)) {
701 priv(dev)->stats.rx_dropped ++;
702 ether3_outw(next_ptr, REG_RECVPTR);
703 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND);
704 }
705
706 return maxcnt;
707
708 dropping:{
709 static unsigned long last_warned;
710
711 ether3_outw(next_ptr >> 8, REG_RECVEND);
712 /*
713 * Don't print this message too many times...
714 */
715 if (time_after(jiffies, last_warned + 10 * HZ)) {
716 last_warned = jiffies;
717 printk("%s: memory squeeze, dropping packet.\n", dev->name);
718 }
719 priv(dev)->stats.rx_dropped ++;
720 goto done;
721 }
722 }
723
724 /*
725 * Update stats for the transmitted packet(s)
726 */
727 static void ether3_tx(struct net_device *dev)
728 {
729 unsigned int tx_tail = priv(dev)->tx_tail;
730 int max_work = 14;
731
732 do {
733 unsigned long status;
734
735 /*
736 * Read the packet header
737 */
738 ether3_setbuffer(dev, buffer_read, tx_tail * 0x600);
739 status = ether3_readlong(dev);
740
741 /*
742 * Check to see if this packet has been transmitted
743 */
744 if ((status & (TXSTAT_DONE | TXHDR_TRANSMIT)) !=
745 (TXSTAT_DONE | TXHDR_TRANSMIT))
746 break;
747
748 /*
749 * Update errors
750 */
751 if (!(status & (TXSTAT_BABBLED | TXSTAT_16COLLISIONS)))
752 priv(dev)->stats.tx_packets++;
753 else {
754 priv(dev)->stats.tx_errors ++;
755 if (status & TXSTAT_16COLLISIONS)
756 priv(dev)->stats.collisions += 16;
757 if (status & TXSTAT_BABBLED)
758 priv(dev)->stats.tx_fifo_errors ++;
759 }
760
761 tx_tail = (tx_tail + 1) & 15;
762 } while (--max_work);
763
764 if (priv(dev)->tx_tail != tx_tail) {
765 priv(dev)->tx_tail = tx_tail;
766 netif_wake_queue(dev);
767 }
768 }
769
770 static void __init ether3_banner(void)
771 {
772 static unsigned version_printed = 0;
773
774 if (net_debug && version_printed++ == 0)
775 printk(KERN_INFO "%s", version);
776 }
777
778 static int __devinit
779 ether3_probe(struct expansion_card *ec, const struct ecard_id *id)
780 {
781 const struct ether3_data *data = id->data;
782 struct net_device *dev;
783 int i, bus_type, ret;
784
785 ether3_banner();
786
787 ret = ecard_request_resources(ec);
788 if (ret)
789 goto out;
790
791 dev = alloc_etherdev(sizeof(struct dev_priv));
792 if (!dev) {
793 ret = -ENOMEM;
794 goto release;
795 }
796
797 SET_MODULE_OWNER(dev);
798 SET_NETDEV_DEV(dev, &ec->dev);
799
800 priv(dev)->base = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
801 ecard_resource_len(ec, ECARD_RES_MEMC));
802 if (!priv(dev)->base) {
803 ret = -ENOMEM;
804 goto free;
805 }
806
807 ec->irqaddr = priv(dev)->base + data->base_offset;
808 ec->irqmask = 0xf0;
809
810 priv(dev)->seeq = priv(dev)->base + data->base_offset;
811 dev->irq = ec->irq;
812
813 ether3_addr(dev->dev_addr, ec);
814
815 init_timer(&priv(dev)->timer);
816
817 /* Reset card...
818 */
819 ether3_outb(0x80, REG_CONFIG2 + 4);
820 bus_type = BUS_UNKNOWN;
821 udelay(4);
822
823 /* Test using Receive Pointer (16-bit register) to find out
824 * how the ether3 is connected to the bus...
825 */
826 if (ether3_probe_bus_8(dev, 0x100) &&
827 ether3_probe_bus_8(dev, 0x201))
828 bus_type = BUS_8;
829
830 if (bus_type == BUS_UNKNOWN &&
831 ether3_probe_bus_16(dev, 0x101) &&
832 ether3_probe_bus_16(dev, 0x201))
833 bus_type = BUS_16;
834
835 switch (bus_type) {
836 case BUS_UNKNOWN:
837 printk(KERN_ERR "%s: unable to identify bus width\n", dev->name);
838 ret = -ENODEV;
839 goto free;
840
841 case BUS_8:
842 printk(KERN_ERR "%s: %s found, but is an unsupported "
843 "8-bit card\n", dev->name, data->name);
844 ret = -ENODEV;
845 goto free;
846
847 default:
848 break;
849 }
850
851 if (ether3_init_2(dev)) {
852 ret = -ENODEV;
853 goto free;
854 }
855
856 dev->open = ether3_open;
857 dev->stop = ether3_close;
858 dev->hard_start_xmit = ether3_sendpacket;
859 dev->get_stats = ether3_getstats;
860 dev->set_multicast_list = ether3_setmulticastlist;
861 dev->tx_timeout = ether3_timeout;
862 dev->watchdog_timeo = 5 * HZ / 100;
863
864 ret = register_netdev(dev);
865 if (ret)
866 goto free;
867
868 printk("%s: %s in slot %d, ", dev->name, data->name, ec->slot_no);
869 for (i = 0; i < 6; i++)
870 printk("%2.2x%c", dev->dev_addr[i], i == 5 ? '\n' : ':');
871
872 ecard_set_drvdata(ec, dev);
873 return 0;
874
875 free:
876 if (priv(dev)->base)
877 iounmap(priv(dev)->base);
878 free_netdev(dev);
879 release:
880 ecard_release_resources(ec);
881 out:
882 return ret;
883 }
884
885 static void __devexit ether3_remove(struct expansion_card *ec)
886 {
887 struct net_device *dev = ecard_get_drvdata(ec);
888
889 ecard_set_drvdata(ec, NULL);
890
891 unregister_netdev(dev);
892 iounmap(priv(dev)->base);
893 free_netdev(dev);
894 ecard_release_resources(ec);
895 }
896
897 static struct ether3_data ether3 = {
898 .name = "ether3",
899 .base_offset = 0,
900 };
901
902 static struct ether3_data etherb = {
903 .name = "etherb",
904 .base_offset = 0x800,
905 };
906
907 static const struct ecard_id ether3_ids[] = {
908 { MANU_ANT2, PROD_ANT_ETHER3, &ether3 },
909 { MANU_ANT, PROD_ANT_ETHER3, &ether3 },
910 { MANU_ANT, PROD_ANT_ETHERB, &etherb },
911 { 0xffff, 0xffff }
912 };
913
914 static struct ecard_driver ether3_driver = {
915 .probe = ether3_probe,
916 .remove = __devexit_p(ether3_remove),
917 .id_table = ether3_ids,
918 .drv = {
919 .name = "ether3",
920 },
921 };
922
923 static int __init ether3_init(void)
924 {
925 return ecard_register_driver(&ether3_driver);
926 }
927
928 static void __exit ether3_exit(void)
929 {
930 ecard_remove_driver(&ether3_driver);
931 }
932
933 module_init(ether3_init);
934 module_exit(ether3_exit);
935
936 MODULE_LICENSE("GPL");
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