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Linux 4.16.11
[linux/fpc-iii.git] / drivers / net / ethernet / seeq / ether3.c
blobc5bc124b41a93a69cffccd7ca44602292309686c
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[] = "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, void __iomem *r)
103 {
104 writeb(v, r);
105 udelay(1);
106 }
107
108 static inline void ether3_outw(int v, 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(struct timer_list *t)
174 {
175 struct dev_priv *private = from_timer(private, t, timer);
176 struct net_device *dev = private->dev;
177
178 ether3_outw(priv(dev)->regs.config2 |= CFG2_CTRLO, REG_CONFIG2);
179 }
180
181 /*
182 * switch LED on...
183 */
184 static inline void ether3_ledon(struct net_device *dev)
185 {
186 del_timer(&priv(dev)->timer);
187 priv(dev)->timer.expires = jiffies + HZ / 50; /* leave on for 1/50th second */
188 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
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
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 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 (request_irq(dev->irq, ether3_interrupt, 0, "ether3", dev))
403 return -EAGAIN;
404
405 ether3_init_for_open(dev);
406
407 netif_start_queue(dev);
408
409 return 0;
410 }
411
412 /*
413 * The inverse routine to ether3_open().
414 */
415 static int
416 ether3_close(struct net_device *dev)
417 {
418 netif_stop_queue(dev);
419
420 disable_irq(dev->irq);
421
422 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
423 priv(dev)->regs.command = 0;
424 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
425 barrier();
426 ether3_outb(0x80, REG_CONFIG2 + 4);
427 ether3_outw(0, REG_COMMAND);
428
429 free_irq(dev->irq, dev);
430
431 return 0;
432 }
433
434 /*
435 * Set or clear promiscuous/multicast mode filter for this adaptor.
436 *
437 * We don't attempt any packet filtering. The card may have a SEEQ 8004
438 * in which does not have the other ethernet address registers present...
439 */
440 static void ether3_setmulticastlist(struct net_device *dev)
441 {
442 priv(dev)->regs.config1 &= ~CFG1_RECVPROMISC;
443
444 if (dev->flags & IFF_PROMISC) {
445 /* promiscuous mode */
446 priv(dev)->regs.config1 |= CFG1_RECVPROMISC;
447 } else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev)) {
448 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI;
449 } else
450 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD;
451
452 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
453 }
454
455 static void ether3_timeout(struct net_device *dev)
456 {
457 unsigned long flags;
458
459 del_timer(&priv(dev)->timer);
460
461 local_irq_save(flags);
462 printk(KERN_ERR "%s: transmit timed out, network cable problem?\n", dev->name);
463 printk(KERN_ERR "%s: state: { status=%04X cfg1=%04X cfg2=%04X }\n", dev->name,
464 ether3_inw(REG_STATUS), ether3_inw(REG_CONFIG1), ether3_inw(REG_CONFIG2));
465 printk(KERN_ERR "%s: { rpr=%04X rea=%04X tpr=%04X }\n", dev->name,
466 ether3_inw(REG_RECVPTR), ether3_inw(REG_RECVEND), ether3_inw(REG_TRANSMITPTR));
467 printk(KERN_ERR "%s: tx head=%X tx tail=%X\n", dev->name,
468 priv(dev)->tx_head, priv(dev)->tx_tail);
469 ether3_setbuffer(dev, buffer_read, priv(dev)->tx_tail);
470 printk(KERN_ERR "%s: packet status = %08X\n", dev->name, ether3_readlong(dev));
471 local_irq_restore(flags);
472
473 priv(dev)->regs.config2 |= CFG2_CTRLO;
474 dev->stats.tx_errors += 1;
475 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
476 priv(dev)->tx_head = priv(dev)->tx_tail = 0;
477
478 netif_wake_queue(dev);
479 }
480
481 /*
482 * Transmit a packet
483 */
484 static int
485 ether3_sendpacket(struct sk_buff *skb, struct net_device *dev)
486 {
487 unsigned long flags;
488 unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
489 unsigned int ptr, next_ptr;
490
491 if (priv(dev)->broken) {
492 dev_kfree_skb(skb);
493 dev->stats.tx_dropped++;
494 netif_start_queue(dev);
495 return NETDEV_TX_OK;
496 }
497
498 length = (length + 1) & ~1;
499 if (length != skb->len) {
500 if (skb_padto(skb, length))
501 goto out;
502 }
503
504 next_ptr = (priv(dev)->tx_head + 1) & 15;
505
506 local_irq_save(flags);
507
508 if (priv(dev)->tx_tail == next_ptr) {
509 local_irq_restore(flags);
510 return NETDEV_TX_BUSY; /* unable to queue */
511 }
512
513 ptr = 0x600 * priv(dev)->tx_head;
514 priv(dev)->tx_head = next_ptr;
515 next_ptr *= 0x600;
516
517 #define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS)
518
519 ether3_setbuffer(dev, buffer_write, next_ptr);
520 ether3_writelong(dev, 0);
521 ether3_setbuffer(dev, buffer_write, ptr);
522 ether3_writelong(dev, 0);
523 ether3_writebuffer(dev, skb->data, length);
524 ether3_writeword(dev, htons(next_ptr));
525 ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16);
526 ether3_setbuffer(dev, buffer_write, ptr);
527 ether3_writeword(dev, htons((ptr + length + 4)));
528 ether3_writeword(dev, TXHDR_FLAGS >> 16);
529 ether3_ledon(dev);
530
531 if (!(ether3_inw(REG_STATUS) & STAT_TXON)) {
532 ether3_outw(ptr, REG_TRANSMITPTR);
533 ether3_outw(priv(dev)->regs.command | CMD_TXON, REG_COMMAND);
534 }
535
536 next_ptr = (priv(dev)->tx_head + 1) & 15;
537 local_irq_restore(flags);
538
539 dev_kfree_skb(skb);
540
541 if (priv(dev)->tx_tail == next_ptr)
542 netif_stop_queue(dev);
543
544 out:
545 return NETDEV_TX_OK;
546 }
547
548 static irqreturn_t
549 ether3_interrupt(int irq, void *dev_id)
550 {
551 struct net_device *dev = (struct net_device *)dev_id;
552 unsigned int status, handled = IRQ_NONE;
553
554 #if NET_DEBUG > 1
555 if(net_debug & DEBUG_INT)
556 printk("eth3irq: %d ", irq);
557 #endif
558
559 status = ether3_inw(REG_STATUS);
560
561 if (status & STAT_INTRX) {
562 ether3_outw(CMD_ACKINTRX | priv(dev)->regs.command, REG_COMMAND);
563 ether3_rx(dev, 12);
564 handled = IRQ_HANDLED;
565 }
566
567 if (status & STAT_INTTX) {
568 ether3_outw(CMD_ACKINTTX | priv(dev)->regs.command, REG_COMMAND);
569 ether3_tx(dev);
570 handled = IRQ_HANDLED;
571 }
572
573 #if NET_DEBUG > 1
574 if(net_debug & DEBUG_INT)
575 printk("done\n");
576 #endif
577 return handled;
578 }
579
580 /*
581 * If we have a good packet(s), get it/them out of the buffers.
582 */
583 static int ether3_rx(struct net_device *dev, unsigned int maxcnt)
584 {
585 unsigned int next_ptr = priv(dev)->rx_head, received = 0;
586
587 ether3_ledon(dev);
588
589 do {
590 unsigned int this_ptr, status;
591 unsigned char addrs[16];
592
593 /*
594 * read the first 16 bytes from the buffer.
595 * This contains the status bytes etc and ethernet addresses,
596 * and we also check the source ethernet address to see if
597 * it originated from us.
598 */
599 {
600 unsigned int temp_ptr;
601 ether3_setbuffer(dev, buffer_read, next_ptr);
602 temp_ptr = ether3_readword(dev);
603 status = ether3_readword(dev);
604 if ((status & (RXSTAT_DONE | RXHDR_CHAINCONTINUE | RXHDR_RECEIVE)) !=
605 (RXSTAT_DONE | RXHDR_CHAINCONTINUE) || !temp_ptr)
606 break;
607
608 this_ptr = next_ptr + 4;
609 next_ptr = ntohs(temp_ptr);
610 }
611 ether3_setbuffer(dev, buffer_read, this_ptr);
612 ether3_readbuffer(dev, addrs+2, 12);
613
614 if (next_ptr < RX_START || next_ptr >= RX_END) {
615 int i;
616 printk("%s: bad next pointer @%04X: ", dev->name, priv(dev)->rx_head);
617 printk("%02X %02X %02X %02X ", next_ptr >> 8, next_ptr & 255, status & 255, status >> 8);
618 for (i = 2; i < 14; i++)
619 printk("%02X ", addrs[i]);
620 printk("\n");
621 next_ptr = priv(dev)->rx_head;
622 break;
623 }
624 /*
625 * ignore our own packets...
626 */
627 if (!(*(unsigned long *)&dev->dev_addr[0] ^ *(unsigned long *)&addrs[2+6]) &&
628 !(*(unsigned short *)&dev->dev_addr[4] ^ *(unsigned short *)&addrs[2+10])) {
629 maxcnt ++; /* compensate for loopedback packet */
630 ether3_outw(next_ptr >> 8, REG_RECVEND);
631 } else
632 if (!(status & (RXSTAT_OVERSIZE|RXSTAT_CRCERROR|RXSTAT_DRIBBLEERROR|RXSTAT_SHORTPACKET))) {
633 unsigned int length = next_ptr - this_ptr;
634 struct sk_buff *skb;
635
636 if (next_ptr <= this_ptr)
637 length += RX_END - RX_START;
638
639 skb = netdev_alloc_skb(dev, length + 2);
640 if (skb) {
641 unsigned char *buf;
642
643 skb_reserve(skb, 2);
644 buf = skb_put(skb, length);
645 ether3_readbuffer(dev, buf + 12, length - 12);
646 ether3_outw(next_ptr >> 8, REG_RECVEND);
647 *(unsigned short *)(buf + 0) = *(unsigned short *)(addrs + 2);
648 *(unsigned long *)(buf + 2) = *(unsigned long *)(addrs + 4);
649 *(unsigned long *)(buf + 6) = *(unsigned long *)(addrs + 8);
650 *(unsigned short *)(buf + 10) = *(unsigned short *)(addrs + 12);
651 skb->protocol = eth_type_trans(skb, dev);
652 netif_rx(skb);
653 received ++;
654 } else {
655 ether3_outw(next_ptr >> 8, REG_RECVEND);
656 dev->stats.rx_dropped++;
657 goto done;
658 }
659 } else {
660 struct net_device_stats *stats = &dev->stats;
661 ether3_outw(next_ptr >> 8, REG_RECVEND);
662 if (status & RXSTAT_OVERSIZE) stats->rx_over_errors ++;
663 if (status & RXSTAT_CRCERROR) stats->rx_crc_errors ++;
664 if (status & RXSTAT_DRIBBLEERROR) stats->rx_fifo_errors ++;
665 if (status & RXSTAT_SHORTPACKET) stats->rx_length_errors ++;
666 stats->rx_errors++;
667 }
668 }
669 while (-- maxcnt);
670
671 done:
672 dev->stats.rx_packets += received;
673 priv(dev)->rx_head = next_ptr;
674 /*
675 * If rx went off line, then that means that the buffer may be full. We
676 * have dropped at least one packet.
677 */
678 if (!(ether3_inw(REG_STATUS) & STAT_RXON)) {
679 dev->stats.rx_dropped++;
680 ether3_outw(next_ptr, REG_RECVPTR);
681 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND);
682 }
683
684 return maxcnt;
685 }
686
687 /*
688 * Update stats for the transmitted packet(s)
689 */
690 static void ether3_tx(struct net_device *dev)
691 {
692 unsigned int tx_tail = priv(dev)->tx_tail;
693 int max_work = 14;
694
695 do {
696 unsigned long status;
697
698 /*
699 * Read the packet header
700 */
701 ether3_setbuffer(dev, buffer_read, tx_tail * 0x600);
702 status = ether3_readlong(dev);
703
704 /*
705 * Check to see if this packet has been transmitted
706 */
707 if ((status & (TXSTAT_DONE | TXHDR_TRANSMIT)) !=
708 (TXSTAT_DONE | TXHDR_TRANSMIT))
709 break;
710
711 /*
712 * Update errors
713 */
714 if (!(status & (TXSTAT_BABBLED | TXSTAT_16COLLISIONS)))
715 dev->stats.tx_packets++;
716 else {
717 dev->stats.tx_errors++;
718 if (status & TXSTAT_16COLLISIONS)
719 dev->stats.collisions += 16;
720 if (status & TXSTAT_BABBLED)
721 dev->stats.tx_fifo_errors++;
722 }
723
724 tx_tail = (tx_tail + 1) & 15;
725 } while (--max_work);
726
727 if (priv(dev)->tx_tail != tx_tail) {
728 priv(dev)->tx_tail = tx_tail;
729 netif_wake_queue(dev);
730 }
731 }
732
733 static void ether3_banner(void)
734 {
735 static unsigned version_printed = 0;
736
737 if (net_debug && version_printed++ == 0)
738 printk(KERN_INFO "%s", version);
739 }
740
741 static const struct net_device_ops ether3_netdev_ops = {
742 .ndo_open = ether3_open,
743 .ndo_stop = ether3_close,
744 .ndo_start_xmit = ether3_sendpacket,
745 .ndo_set_rx_mode = ether3_setmulticastlist,
746 .ndo_tx_timeout = ether3_timeout,
747 .ndo_validate_addr = eth_validate_addr,
748 .ndo_set_mac_address = eth_mac_addr,
749 };
750
751 static int
752 ether3_probe(struct expansion_card *ec, const struct ecard_id *id)
753 {
754 const struct ether3_data *data = id->data;
755 struct net_device *dev;
756 int bus_type, ret;
757
758 ether3_banner();
759
760 ret = ecard_request_resources(ec);
761 if (ret)
762 goto out;
763
764 dev = alloc_etherdev(sizeof(struct dev_priv));
765 if (!dev) {
766 ret = -ENOMEM;
767 goto release;
768 }
769
770 SET_NETDEV_DEV(dev, &ec->dev);
771
772 priv(dev)->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
773 if (!priv(dev)->base) {
774 ret = -ENOMEM;
775 goto free;
776 }
777
778 ec->irqaddr = priv(dev)->base + data->base_offset;
779 ec->irqmask = 0xf0;
780
781 priv(dev)->seeq = priv(dev)->base + data->base_offset;
782 dev->irq = ec->irq;
783
784 ether3_addr(dev->dev_addr, ec);
785
786 priv(dev)->dev = dev;
787 timer_setup(&priv(dev)->timer, ether3_ledoff, 0);
788
789 /* Reset card...
790 */
791 ether3_outb(0x80, REG_CONFIG2 + 4);
792 bus_type = BUS_UNKNOWN;
793 udelay(4);
794
795 /* Test using Receive Pointer (16-bit register) to find out
796 * how the ether3 is connected to the bus...
797 */
798 if (ether3_probe_bus_8(dev, 0x100) &&
799 ether3_probe_bus_8(dev, 0x201))
800 bus_type = BUS_8;
801
802 if (bus_type == BUS_UNKNOWN &&
803 ether3_probe_bus_16(dev, 0x101) &&
804 ether3_probe_bus_16(dev, 0x201))
805 bus_type = BUS_16;
806
807 switch (bus_type) {
808 case BUS_UNKNOWN:
809 printk(KERN_ERR "%s: unable to identify bus width\n", dev->name);
810 ret = -ENODEV;
811 goto free;
812
813 case BUS_8:
814 printk(KERN_ERR "%s: %s found, but is an unsupported "
815 "8-bit card\n", dev->name, data->name);
816 ret = -ENODEV;
817 goto free;
818
819 default:
820 break;
821 }
822
823 if (ether3_init_2(dev)) {
824 ret = -ENODEV;
825 goto free;
826 }
827
828 dev->netdev_ops = &ether3_netdev_ops;
829 dev->watchdog_timeo = 5 * HZ / 100;
830
831 ret = register_netdev(dev);
832 if (ret)
833 goto free;
834
835 printk("%s: %s in slot %d, %pM\n",
836 dev->name, data->name, ec->slot_no, dev->dev_addr);
837
838 ecard_set_drvdata(ec, dev);
839 return 0;
840
841 free:
842 free_netdev(dev);
843 release:
844 ecard_release_resources(ec);
845 out:
846 return ret;
847 }
848
849 static void ether3_remove(struct expansion_card *ec)
850 {
851 struct net_device *dev = ecard_get_drvdata(ec);
852
853 ecard_set_drvdata(ec, NULL);
854
855 unregister_netdev(dev);
856 free_netdev(dev);
857 ecard_release_resources(ec);
858 }
859
860 static struct ether3_data ether3 = {
861 .name = "ether3",
862 .base_offset = 0,
863 };
864
865 static struct ether3_data etherb = {
866 .name = "etherb",
867 .base_offset = 0x800,
868 };
869
870 static const struct ecard_id ether3_ids[] = {
871 { MANU_ANT2, PROD_ANT_ETHER3, &ether3 },
872 { MANU_ANT, PROD_ANT_ETHER3, &ether3 },
873 { MANU_ANT, PROD_ANT_ETHERB, &etherb },
874 { 0xffff, 0xffff }
875 };
876
877 static struct ecard_driver ether3_driver = {
878 .probe = ether3_probe,
879 .remove = ether3_remove,
880 .id_table = ether3_ids,
881 .drv = {
882 .name = "ether3",
883 },
884 };
885
886 static int __init ether3_init(void)
887 {
888 return ecard_register_driver(&ether3_driver);
889 }
890
891 static void __exit ether3_exit(void)
892 {
893 ecard_remove_driver(&ether3_driver);
894 }
895
896 module_init(ether3_init);
897 module_exit(ether3_exit);
898
899 MODULE_LICENSE("GPL");
Linux with added FPC-III support