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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / ethernet / seeq / ether3.c
blob128ee7cda1ede29063f80bb795367b34aec7708a
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * linux/drivers/acorn/net/ether3.c
4 *
5 * Copyright (C) 1995-2000 Russell King
6 *
7 * SEEQ nq8005 ethernet driver for Acorn/ANT Ether3 card
8 * for Acorn machines
9 *
10 * By Russell King, with some suggestions from borris@ant.co.uk
11 *
12 * Changelog:
13 * 1.04 RMK 29/02/1996 Won't pass packets that are from our ethernet
14 * address up to the higher levels - they're
15 * silently ignored. I/F can now be put into
16 * multicast mode. Receiver routine optimised.
17 * 1.05 RMK 30/02/1996 Now claims interrupt at open when part of
18 * the kernel rather than when a module.
19 * 1.06 RMK 02/03/1996 Various code cleanups
20 * 1.07 RMK 13/10/1996 Optimised interrupt routine and transmit
21 * routines.
22 * 1.08 RMK 14/10/1996 Fixed problem with too many packets,
23 * prevented the kernel message about dropped
24 * packets appearing too many times a second.
25 * Now does not disable all IRQs, only the IRQ
26 * used by this card.
27 * 1.09 RMK 10/11/1996 Only enables TX irq when buffer space is low,
28 * but we still service the TX queue if we get a
29 * RX interrupt.
30 * 1.10 RMK 15/07/1997 Fixed autoprobing of NQ8004.
31 * 1.11 RMK 16/11/1997 Fixed autoprobing of NQ8005A.
32 * 1.12 RMK 31/12/1997 Removed reference to dev_tint for Linux 2.1.
33 * RMK 27/06/1998 Changed asm/delay.h to linux/delay.h.
34 * 1.13 RMK 29/06/1998 Fixed problem with transmission of packets.
35 * Chip seems to have a bug in, whereby if the
36 * packet starts two bytes from the end of the
37 * buffer, it corrupts the receiver chain, and
38 * never updates the transmit status correctly.
39 * 1.14 RMK 07/01/1998 Added initial code for ETHERB addressing.
40 * 1.15 RMK 30/04/1999 More fixes to the transmit routine for buggy
41 * hardware.
42 * 1.16 RMK 10/02/2000 Updated for 2.3.43
43 * 1.17 RMK 13/05/2000 Updated for 2.3.99-pre8
44 */
45
46 #include <linux/module.h>
47 #include <linux/kernel.h>
48 #include <linux/types.h>
49 #include <linux/fcntl.h>
50 #include <linux/interrupt.h>
51 #include <linux/ioport.h>
52 #include <linux/in.h>
53 #include <linux/slab.h>
54 #include <linux/string.h>
55 #include <linux/errno.h>
56 #include <linux/netdevice.h>
57 #include <linux/etherdevice.h>
58 #include <linux/skbuff.h>
59 #include <linux/device.h>
60 #include <linux/init.h>
61 #include <linux/delay.h>
62 #include <linux/bitops.h>
63
64 #include <asm/ecard.h>
65 #include <asm/io.h>
66
67 static char version[] = "ether3 ethernet driver (c) 1995-2000 R.M.King v1.17\n";
68
69 #include "ether3.h"
70
71 static unsigned int net_debug = NET_DEBUG;
72
73 static void ether3_setmulticastlist(struct net_device *dev);
74 static int ether3_rx(struct net_device *dev, unsigned int maxcnt);
75 static void ether3_tx(struct net_device *dev);
76 static int ether3_open (struct net_device *dev);
77 static netdev_tx_t ether3_sendpacket(struct sk_buff *skb,
78 struct net_device *dev);
79 static irqreturn_t ether3_interrupt (int irq, void *dev_id);
80 static int ether3_close (struct net_device *dev);
81 static void ether3_setmulticastlist (struct net_device *dev);
82 static void ether3_timeout(struct net_device *dev, unsigned int txqueue);
83
84 #define BUS_16 2
85 #define BUS_8 1
86 #define BUS_UNKNOWN 0
87
88 /* --------------------------------------------------------------------------- */
89
90 typedef enum {
91 buffer_write,
92 buffer_read
93 } buffer_rw_t;
94
95 /*
96 * ether3 read/write. Slow things down a bit...
97 * The SEEQ8005 doesn't like us writing to its registers
98 * too quickly.
99 */
100 static inline void ether3_outb(int v, void __iomem *r)
101 {
102 writeb(v, r);
103 udelay(1);
104 }
105
106 static inline void ether3_outw(int v, void __iomem *r)
107 {
108 writew(v, r);
109 udelay(1);
110 }
111 #define ether3_inb(r) ({ unsigned int __v = readb((r)); udelay(1); __v; })
112 #define ether3_inw(r) ({ unsigned int __v = readw((r)); udelay(1); __v; })
113
114 static int
115 ether3_setbuffer(struct net_device *dev, buffer_rw_t read, int start)
116 {
117 int timeout = 1000;
118
119 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
120 ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
121
122 while ((ether3_inw(REG_STATUS) & STAT_FIFOEMPTY) == 0) {
123 if (!timeout--) {
124 printk("%s: setbuffer broken\n", dev->name);
125 priv(dev)->broken = 1;
126 return 1;
127 }
128 udelay(1);
129 }
130
131 if (read == buffer_read) {
132 ether3_outw(start, REG_DMAADDR);
133 ether3_outw(priv(dev)->regs.command | CMD_FIFOREAD, REG_COMMAND);
134 } else {
135 ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
136 ether3_outw(start, REG_DMAADDR);
137 }
138 return 0;
139 }
140
141 /*
142 * write data to the buffer memory
143 */
144 #define ether3_writebuffer(dev,data,length) \
145 writesw(REG_BUFWIN, (data), (length) >> 1)
146
147 #define ether3_writeword(dev,data) \
148 writew((data), REG_BUFWIN)
149
150 #define ether3_writelong(dev,data) { \
151 void __iomem *reg_bufwin = REG_BUFWIN; \
152 writew((data), reg_bufwin); \
153 writew((data) >> 16, reg_bufwin); \
154 }
155
156 /*
157 * read data from the buffer memory
158 */
159 #define ether3_readbuffer(dev,data,length) \
160 readsw(REG_BUFWIN, (data), (length) >> 1)
161
162 #define ether3_readword(dev) \
163 readw(REG_BUFWIN)
164
165 #define ether3_readlong(dev) \
166 readw(REG_BUFWIN) | (readw(REG_BUFWIN) << 16)
167
168 /*
169 * Switch LED off...
170 */
171 static void ether3_ledoff(struct timer_list *t)
172 {
173 struct dev_priv *private = from_timer(private, t, timer);
174 struct net_device *dev = private->dev;
175
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 add_timer(&priv(dev)->timer);
187 if (priv(dev)->regs.config2 & CFG2_CTRLO)
188 ether3_outw(priv(dev)->regs.config2 &= ~CFG2_CTRLO, REG_CONFIG2);
189 }
190
191 /*
192 * Read the ethernet address string from the on board rom.
193 * This is an ascii string!!!
194 */
195 static int
196 ether3_addr(char *addr, struct expansion_card *ec)
197 {
198 struct in_chunk_dir cd;
199 char *s;
200
201 if (ecard_readchunk(&cd, ec, 0xf5, 0) && (s = strchr(cd.d.string, '('))) {
202 int i;
203 for (i = 0; i<6; i++) {
204 addr[i] = simple_strtoul(s + 1, &s, 0x10);
205 if (*s != (i==5?')' : ':' ))
206 break;
207 }
208 if (i == 6)
209 return 0;
210 }
211 /* I wonder if we should even let the user continue in this case
212 * - no, it would be better to disable the device
213 */
214 printk(KERN_ERR "ether3: Couldn't read a valid MAC address from card.\n");
215 return -ENODEV;
216 }
217
218 /* --------------------------------------------------------------------------- */
219
220 static int
221 ether3_ramtest(struct net_device *dev, unsigned char byte)
222 {
223 unsigned char *buffer = kmalloc(RX_END, GFP_KERNEL);
224 int i,ret = 0;
225 int max_errors = 4;
226 int bad = -1;
227
228 if (!buffer)
229 return 1;
230
231 memset(buffer, byte, RX_END);
232 ether3_setbuffer(dev, buffer_write, 0);
233 ether3_writebuffer(dev, buffer, TX_END);
234 ether3_setbuffer(dev, buffer_write, RX_START);
235 ether3_writebuffer(dev, buffer + RX_START, RX_LEN);
236 memset(buffer, byte ^ 0xff, RX_END);
237 ether3_setbuffer(dev, buffer_read, 0);
238 ether3_readbuffer(dev, buffer, TX_END);
239 ether3_setbuffer(dev, buffer_read, RX_START);
240 ether3_readbuffer(dev, buffer + RX_START, RX_LEN);
241
242 for (i = 0; i < RX_END; i++) {
243 if (buffer[i] != byte) {
244 if (max_errors > 0 && bad != buffer[i]) {
245 printk("%s: RAM failed with (%02X instead of %02X) at 0x%04X",
246 dev->name, buffer[i], byte, i);
247 ret = 2;
248 max_errors--;
249 bad = i;
250 }
251 } else {
252 if (bad != -1) {
253 if (bad != i - 1)
254 printk(" - 0x%04X\n", i - 1);
255 printk("\n");
256 bad = -1;
257 }
258 }
259 }
260 if (bad != -1)
261 printk(" - 0xffff\n");
262 kfree(buffer);
263
264 return ret;
265 }
266
267 /* ------------------------------------------------------------------------------- */
268
269 static int ether3_init_2(struct net_device *dev)
270 {
271 int i;
272
273 priv(dev)->regs.config1 = CFG1_RECVCOMPSTAT0|CFG1_DMABURST8;
274 priv(dev)->regs.config2 = CFG2_CTRLO|CFG2_RECVCRC|CFG2_ERRENCRC;
275 priv(dev)->regs.command = 0;
276
277 /*
278 * Set up our hardware address
279 */
280 ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
281 for (i = 0; i < 6; i++)
282 ether3_outb(dev->dev_addr[i], REG_BUFWIN);
283
284 if (dev->flags & IFF_PROMISC)
285 priv(dev)->regs.config1 |= CFG1_RECVPROMISC;
286 else if (dev->flags & IFF_MULTICAST)
287 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI;
288 else
289 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD;
290
291 /*
292 * There is a problem with the NQ8005 in that it occasionally loses the
293 * last two bytes. To get round this problem, we receive the CRC as
294 * well. That way, if we do lose the last two, then it doesn't matter.
295 */
296 ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
297 ether3_outw((TX_END>>8) - 1, REG_BUFWIN);
298 ether3_outw(priv(dev)->rx_head, REG_RECVPTR);
299 ether3_outw(0, REG_TRANSMITPTR);
300 ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND);
301 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
302 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
303 ether3_outw(priv(dev)->regs.command, REG_COMMAND);
304
305 i = ether3_ramtest(dev, 0x5A);
306 if(i)
307 return i;
308 i = ether3_ramtest(dev, 0x1E);
309 if(i)
310 return i;
311
312 ether3_setbuffer(dev, buffer_write, 0);
313 ether3_writelong(dev, 0);
314 return 0;
315 }
316
317 static void
318 ether3_init_for_open(struct net_device *dev)
319 {
320 int i;
321
322 /* Reset the chip */
323 ether3_outw(CFG2_RESET, REG_CONFIG2);
324 udelay(4);
325
326 priv(dev)->regs.command = 0;
327 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
328 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
329 barrier();
330
331 ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
332 for (i = 0; i < 6; i++)
333 ether3_outb(dev->dev_addr[i], REG_BUFWIN);
334
335 priv(dev)->tx_head = 0;
336 priv(dev)->tx_tail = 0;
337 priv(dev)->regs.config2 |= CFG2_CTRLO;
338 priv(dev)->rx_head = RX_START;
339
340 ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
341 ether3_outw((TX_END>>8) - 1, REG_BUFWIN);
342 ether3_outw(priv(dev)->rx_head, REG_RECVPTR);
343 ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND);
344 ether3_outw(0, REG_TRANSMITPTR);
345 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
346 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
347
348 ether3_setbuffer(dev, buffer_write, 0);
349 ether3_writelong(dev, 0);
350
351 priv(dev)->regs.command = CMD_ENINTRX | CMD_ENINTTX;
352 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND);
353 }
354
355 static inline int
356 ether3_probe_bus_8(struct net_device *dev, int val)
357 {
358 int write_low, write_high, read_low, read_high;
359
360 write_low = val & 255;
361 write_high = val >> 8;
362
363 printk(KERN_DEBUG "ether3_probe: write8 [%02X:%02X]", write_high, write_low);
364
365 ether3_outb(write_low, REG_RECVPTR);
366 ether3_outb(write_high, REG_RECVPTR + 4);
367
368 read_low = ether3_inb(REG_RECVPTR);
369 read_high = ether3_inb(REG_RECVPTR + 4);
370
371 printk(", read8 [%02X:%02X]\n", read_high, read_low);
372
373 return read_low == write_low && read_high == write_high;
374 }
375
376 static inline int
377 ether3_probe_bus_16(struct net_device *dev, int val)
378 {
379 int read_val;
380
381 ether3_outw(val, REG_RECVPTR);
382 read_val = ether3_inw(REG_RECVPTR);
383
384 printk(KERN_DEBUG "ether3_probe: write16 [%04X], read16 [%04X]\n", val, read_val);
385
386 return read_val == val;
387 }
388
389 /*
390 * Open/initialize the board. This is called (in the current kernel)
391 * sometime after booting when the 'ifconfig' program is run.
392 *
393 * This routine should set everything up anew at each open, even
394 * registers that "should" only need to be set once at boot, so that
395 * there is non-reboot way to recover if something goes wrong.
396 */
397 static int
398 ether3_open(struct net_device *dev)
399 {
400 if (request_irq(dev->irq, ether3_interrupt, 0, "ether3", dev))
401 return -EAGAIN;
402
403 ether3_init_for_open(dev);
404
405 netif_start_queue(dev);
406
407 return 0;
408 }
409
410 /*
411 * The inverse routine to ether3_open().
412 */
413 static int
414 ether3_close(struct net_device *dev)
415 {
416 netif_stop_queue(dev);
417
418 disable_irq(dev->irq);
419
420 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
421 priv(dev)->regs.command = 0;
422 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
423 barrier();
424 ether3_outb(0x80, REG_CONFIG2 + 4);
425 ether3_outw(0, REG_COMMAND);
426
427 free_irq(dev->irq, dev);
428
429 return 0;
430 }
431
432 /*
433 * Set or clear promiscuous/multicast mode filter for this adaptor.
434 *
435 * We don't attempt any packet filtering. The card may have a SEEQ 8004
436 * in which does not have the other ethernet address registers present...
437 */
438 static void ether3_setmulticastlist(struct net_device *dev)
439 {
440 priv(dev)->regs.config1 &= ~CFG1_RECVPROMISC;
441
442 if (dev->flags & IFF_PROMISC) {
443 /* promiscuous mode */
444 priv(dev)->regs.config1 |= CFG1_RECVPROMISC;
445 } else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev)) {
446 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI;
447 } else
448 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD;
449
450 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
451 }
452
453 static void ether3_timeout(struct net_device *dev, unsigned int txqueue)
454 {
455 unsigned long flags;
456
457 del_timer(&priv(dev)->timer);
458
459 local_irq_save(flags);
460 printk(KERN_ERR "%s: transmit timed out, network cable problem?\n", dev->name);
461 printk(KERN_ERR "%s: state: { status=%04X cfg1=%04X cfg2=%04X }\n", dev->name,
462 ether3_inw(REG_STATUS), ether3_inw(REG_CONFIG1), ether3_inw(REG_CONFIG2));
463 printk(KERN_ERR "%s: { rpr=%04X rea=%04X tpr=%04X }\n", dev->name,
464 ether3_inw(REG_RECVPTR), ether3_inw(REG_RECVEND), ether3_inw(REG_TRANSMITPTR));
465 printk(KERN_ERR "%s: tx head=%X tx tail=%X\n", dev->name,
466 priv(dev)->tx_head, priv(dev)->tx_tail);
467 ether3_setbuffer(dev, buffer_read, priv(dev)->tx_tail);
468 printk(KERN_ERR "%s: packet status = %08X\n", dev->name, ether3_readlong(dev));
469 local_irq_restore(flags);
470
471 priv(dev)->regs.config2 |= CFG2_CTRLO;
472 dev->stats.tx_errors += 1;
473 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
474 priv(dev)->tx_head = priv(dev)->tx_tail = 0;
475
476 netif_wake_queue(dev);
477 }
478
479 /*
480 * Transmit a packet
481 */
482 static netdev_tx_t
483 ether3_sendpacket(struct sk_buff *skb, struct net_device *dev)
484 {
485 unsigned long flags;
486 unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
487 unsigned int ptr, next_ptr;
488
489 if (priv(dev)->broken) {
490 dev_kfree_skb(skb);
491 dev->stats.tx_dropped++;
492 netif_start_queue(dev);
493 return NETDEV_TX_OK;
494 }
495
496 length = (length + 1) & ~1;
497 if (length != skb->len) {
498 if (skb_padto(skb, length))
499 goto out;
500 }
501
502 next_ptr = (priv(dev)->tx_head + 1) & 15;
503
504 local_irq_save(flags);
505
506 if (priv(dev)->tx_tail == next_ptr) {
507 local_irq_restore(flags);
508 return NETDEV_TX_BUSY; /* unable to queue */
509 }
510
511 ptr = 0x600 * priv(dev)->tx_head;
512 priv(dev)->tx_head = next_ptr;
513 next_ptr *= 0x600;
514
515 #define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS)
516
517 ether3_setbuffer(dev, buffer_write, next_ptr);
518 ether3_writelong(dev, 0);
519 ether3_setbuffer(dev, buffer_write, ptr);
520 ether3_writelong(dev, 0);
521 ether3_writebuffer(dev, skb->data, length);
522 ether3_writeword(dev, htons(next_ptr));
523 ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16);
524 ether3_setbuffer(dev, buffer_write, ptr);
525 ether3_writeword(dev, htons((ptr + length + 4)));
526 ether3_writeword(dev, TXHDR_FLAGS >> 16);
527 ether3_ledon(dev);
528
529 if (!(ether3_inw(REG_STATUS) & STAT_TXON)) {
530 ether3_outw(ptr, REG_TRANSMITPTR);
531 ether3_outw(priv(dev)->regs.command | CMD_TXON, REG_COMMAND);
532 }
533
534 next_ptr = (priv(dev)->tx_head + 1) & 15;
535 local_irq_restore(flags);
536
537 dev_kfree_skb(skb);
538
539 if (priv(dev)->tx_tail == next_ptr)
540 netif_stop_queue(dev);
541
542 out:
543 return NETDEV_TX_OK;
544 }
545
546 static irqreturn_t
547 ether3_interrupt(int irq, void *dev_id)
548 {
549 struct net_device *dev = (struct net_device *)dev_id;
550 unsigned int status, handled = IRQ_NONE;
551
552 #if NET_DEBUG > 1
553 if(net_debug & DEBUG_INT)
554 printk("eth3irq: %d ", irq);
555 #endif
556
557 status = ether3_inw(REG_STATUS);
558
559 if (status & STAT_INTRX) {
560 ether3_outw(CMD_ACKINTRX | priv(dev)->regs.command, REG_COMMAND);
561 ether3_rx(dev, 12);
562 handled = IRQ_HANDLED;
563 }
564
565 if (status & STAT_INTTX) {
566 ether3_outw(CMD_ACKINTTX | priv(dev)->regs.command, REG_COMMAND);
567 ether3_tx(dev);
568 handled = IRQ_HANDLED;
569 }
570
571 #if NET_DEBUG > 1
572 if(net_debug & DEBUG_INT)
573 printk("done\n");
574 #endif
575 return handled;
576 }
577
578 /*
579 * If we have a good packet(s), get it/them out of the buffers.
580 */
581 static int ether3_rx(struct net_device *dev, unsigned int maxcnt)
582 {
583 unsigned int next_ptr = priv(dev)->rx_head, received = 0;
584
585 ether3_ledon(dev);
586
587 do {
588 unsigned int this_ptr, status;
589 unsigned char addrs[16];
590
591 /*
592 * read the first 16 bytes from the buffer.
593 * This contains the status bytes etc and ethernet addresses,
594 * and we also check the source ethernet address to see if
595 * it originated from us.
596 */
597 {
598 unsigned int temp_ptr;
599 ether3_setbuffer(dev, buffer_read, next_ptr);
600 temp_ptr = ether3_readword(dev);
601 status = ether3_readword(dev);
602 if ((status & (RXSTAT_DONE | RXHDR_CHAINCONTINUE | RXHDR_RECEIVE)) !=
603 (RXSTAT_DONE | RXHDR_CHAINCONTINUE) || !temp_ptr)
604 break;
605
606 this_ptr = next_ptr + 4;
607 next_ptr = ntohs(temp_ptr);
608 }
609 ether3_setbuffer(dev, buffer_read, this_ptr);
610 ether3_readbuffer(dev, addrs+2, 12);
611
612 if (next_ptr < RX_START || next_ptr >= RX_END) {
613 int i;
614 printk("%s: bad next pointer @%04X: ", dev->name, priv(dev)->rx_head);
615 printk("%02X %02X %02X %02X ", next_ptr >> 8, next_ptr & 255, status & 255, status >> 8);
616 for (i = 2; i < 14; i++)
617 printk("%02X ", addrs[i]);
618 printk("\n");
619 next_ptr = priv(dev)->rx_head;
620 break;
621 }
622 /*
623 * ignore our own packets...
624 */
625 if (!(*(unsigned long *)&dev->dev_addr[0] ^ *(unsigned long *)&addrs[2+6]) &&
626 !(*(unsigned short *)&dev->dev_addr[4] ^ *(unsigned short *)&addrs[2+10])) {
627 maxcnt ++; /* compensate for loopedback packet */
628 ether3_outw(next_ptr >> 8, REG_RECVEND);
629 } else
630 if (!(status & (RXSTAT_OVERSIZE|RXSTAT_CRCERROR|RXSTAT_DRIBBLEERROR|RXSTAT_SHORTPACKET))) {
631 unsigned int length = next_ptr - this_ptr;
632 struct sk_buff *skb;
633
634 if (next_ptr <= this_ptr)
635 length += RX_END - RX_START;
636
637 skb = netdev_alloc_skb(dev, length + 2);
638 if (skb) {
639 unsigned char *buf;
640
641 skb_reserve(skb, 2);
642 buf = skb_put(skb, length);
643 ether3_readbuffer(dev, buf + 12, length - 12);
644 ether3_outw(next_ptr >> 8, REG_RECVEND);
645 *(unsigned short *)(buf + 0) = *(unsigned short *)(addrs + 2);
646 *(unsigned long *)(buf + 2) = *(unsigned long *)(addrs + 4);
647 *(unsigned long *)(buf + 6) = *(unsigned long *)(addrs + 8);
648 *(unsigned short *)(buf + 10) = *(unsigned short *)(addrs + 12);
649 skb->protocol = eth_type_trans(skb, dev);
650 netif_rx(skb);
651 received ++;
652 } else {
653 ether3_outw(next_ptr >> 8, REG_RECVEND);
654 dev->stats.rx_dropped++;
655 goto done;
656 }
657 } else {
658 struct net_device_stats *stats = &dev->stats;
659 ether3_outw(next_ptr >> 8, REG_RECVEND);
660 if (status & RXSTAT_OVERSIZE) stats->rx_over_errors ++;
661 if (status & RXSTAT_CRCERROR) stats->rx_crc_errors ++;
662 if (status & RXSTAT_DRIBBLEERROR) stats->rx_fifo_errors ++;
663 if (status & RXSTAT_SHORTPACKET) stats->rx_length_errors ++;
664 stats->rx_errors++;
665 }
666 }
667 while (-- maxcnt);
668
669 done:
670 dev->stats.rx_packets += received;
671 priv(dev)->rx_head = next_ptr;
672 /*
673 * If rx went off line, then that means that the buffer may be full. We
674 * have dropped at least one packet.
675 */
676 if (!(ether3_inw(REG_STATUS) & STAT_RXON)) {
677 dev->stats.rx_dropped++;
678 ether3_outw(next_ptr, REG_RECVPTR);
679 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND);
680 }
681
682 return maxcnt;
683 }
684
685 /*
686 * Update stats for the transmitted packet(s)
687 */
688 static void ether3_tx(struct net_device *dev)
689 {
690 unsigned int tx_tail = priv(dev)->tx_tail;
691 int max_work = 14;
692
693 do {
694 unsigned long status;
695
696 /*
697 * Read the packet header
698 */
699 ether3_setbuffer(dev, buffer_read, tx_tail * 0x600);
700 status = ether3_readlong(dev);
701
702 /*
703 * Check to see if this packet has been transmitted
704 */
705 if ((status & (TXSTAT_DONE | TXHDR_TRANSMIT)) !=
706 (TXSTAT_DONE | TXHDR_TRANSMIT))
707 break;
708
709 /*
710 * Update errors
711 */
712 if (!(status & (TXSTAT_BABBLED | TXSTAT_16COLLISIONS)))
713 dev->stats.tx_packets++;
714 else {
715 dev->stats.tx_errors++;
716 if (status & TXSTAT_16COLLISIONS)
717 dev->stats.collisions += 16;
718 if (status & TXSTAT_BABBLED)
719 dev->stats.tx_fifo_errors++;
720 }
721
722 tx_tail = (tx_tail + 1) & 15;
723 } while (--max_work);
724
725 if (priv(dev)->tx_tail != tx_tail) {
726 priv(dev)->tx_tail = tx_tail;
727 netif_wake_queue(dev);
728 }
729 }
730
731 static void ether3_banner(void)
732 {
733 static unsigned version_printed = 0;
734
735 if (net_debug && version_printed++ == 0)
736 printk(KERN_INFO "%s", version);
737 }
738
739 static const struct net_device_ops ether3_netdev_ops = {
740 .ndo_open = ether3_open,
741 .ndo_stop = ether3_close,
742 .ndo_start_xmit = ether3_sendpacket,
743 .ndo_set_rx_mode = ether3_setmulticastlist,
744 .ndo_tx_timeout = ether3_timeout,
745 .ndo_validate_addr = eth_validate_addr,
746 .ndo_set_mac_address = eth_mac_addr,
747 };
748
749 static int
750 ether3_probe(struct expansion_card *ec, const struct ecard_id *id)
751 {
752 const struct ether3_data *data = id->data;
753 struct net_device *dev;
754 int bus_type, ret;
755
756 ether3_banner();
757
758 ret = ecard_request_resources(ec);
759 if (ret)
760 goto out;
761
762 dev = alloc_etherdev(sizeof(struct dev_priv));
763 if (!dev) {
764 ret = -ENOMEM;
765 goto release;
766 }
767
768 SET_NETDEV_DEV(dev, &ec->dev);
769
770 priv(dev)->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
771 if (!priv(dev)->base) {
772 ret = -ENOMEM;
773 goto free;
774 }
775
776 ec->irqaddr = priv(dev)->base + data->base_offset;
777 ec->irqmask = 0xf0;
778
779 priv(dev)->seeq = priv(dev)->base + data->base_offset;
780 dev->irq = ec->irq;
781
782 ether3_addr(dev->dev_addr, ec);
783
784 priv(dev)->dev = dev;
785 timer_setup(&priv(dev)->timer, ether3_ledoff, 0);
786
787 /* Reset card...
788 */
789 ether3_outb(0x80, REG_CONFIG2 + 4);
790 bus_type = BUS_UNKNOWN;
791 udelay(4);
792
793 /* Test using Receive Pointer (16-bit register) to find out
794 * how the ether3 is connected to the bus...
795 */
796 if (ether3_probe_bus_8(dev, 0x100) &&
797 ether3_probe_bus_8(dev, 0x201))
798 bus_type = BUS_8;
799
800 if (bus_type == BUS_UNKNOWN &&
801 ether3_probe_bus_16(dev, 0x101) &&
802 ether3_probe_bus_16(dev, 0x201))
803 bus_type = BUS_16;
804
805 switch (bus_type) {
806 case BUS_UNKNOWN:
807 printk(KERN_ERR "%s: unable to identify bus width\n", dev->name);
808 ret = -ENODEV;
809 goto free;
810
811 case BUS_8:
812 printk(KERN_ERR "%s: %s found, but is an unsupported "
813 "8-bit card\n", dev->name, data->name);
814 ret = -ENODEV;
815 goto free;
816
817 default:
818 break;
819 }
820
821 if (ether3_init_2(dev)) {
822 ret = -ENODEV;
823 goto free;
824 }
825
826 dev->netdev_ops = &ether3_netdev_ops;
827 dev->watchdog_timeo = 5 * HZ / 100;
828
829 ret = register_netdev(dev);
830 if (ret)
831 goto free;
832
833 printk("%s: %s in slot %d, %pM\n",
834 dev->name, data->name, ec->slot_no, dev->dev_addr);
835
836 ecard_set_drvdata(ec, dev);
837 return 0;
838
839 free:
840 free_netdev(dev);
841 release:
842 ecard_release_resources(ec);
843 out:
844 return ret;
845 }
846
847 static void ether3_remove(struct expansion_card *ec)
848 {
849 struct net_device *dev = ecard_get_drvdata(ec);
850
851 ecard_set_drvdata(ec, NULL);
852
853 unregister_netdev(dev);
854 free_netdev(dev);
855 ecard_release_resources(ec);
856 }
857
858 static struct ether3_data ether3 = {
859 .name = "ether3",
860 .base_offset = 0,
861 };
862
863 static struct ether3_data etherb = {
864 .name = "etherb",
865 .base_offset = 0x800,
866 };
867
868 static const struct ecard_id ether3_ids[] = {
869 { MANU_ANT2, PROD_ANT_ETHER3, &ether3 },
870 { MANU_ANT, PROD_ANT_ETHER3, &ether3 },
871 { MANU_ANT, PROD_ANT_ETHERB, &etherb },
872 { 0xffff, 0xffff }
873 };
874
875 static struct ecard_driver ether3_driver = {
876 .probe = ether3_probe,
877 .remove = ether3_remove,
878 .id_table = ether3_ids,
879 .drv = {
880 .name = "ether3",
881 },
882 };
883
884 static int __init ether3_init(void)
885 {
886 return ecard_register_driver(&ether3_driver);
887 }
888
889 static void __exit ether3_exit(void)
890 {
891 ecard_remove_driver(&ether3_driver);
892 }
893
894 module_init(ether3_init);
895 module_exit(ether3_exit);
896
897 MODULE_LICENSE("GPL");
Linux with added FPC-III support