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/system.h>
68 #include <asm/ecard.h>
69 #include <asm/io.h>
70
71 static char version[] __devinitdata = "ether3 ethernet driver (c) 1995-2000 R.M.King v1.17\n";
72
73 #include "ether3.h"
74
75 static unsigned int net_debug = NET_DEBUG;
76
77 static void ether3_setmulticastlist(struct net_device *dev);
78 static int ether3_rx(struct net_device *dev, unsigned int maxcnt);
79 static void ether3_tx(struct net_device *dev);
80 static int ether3_open (struct net_device *dev);
81 static int ether3_sendpacket (struct sk_buff *skb, struct net_device *dev);
82 static irqreturn_t ether3_interrupt (int irq, void *dev_id);
83 static int ether3_close (struct net_device *dev);
84 static struct net_device_stats *ether3_getstats (struct net_device *dev);
85 static void ether3_setmulticastlist (struct net_device *dev);
86 static void ether3_timeout(struct net_device *dev);
87
88 #define BUS_16 2
89 #define BUS_8 1
90 #define BUS_UNKNOWN 0
91
92 /* --------------------------------------------------------------------------- */
93
94 typedef enum {
95 buffer_write,
96 buffer_read
97 } buffer_rw_t;
98
99 /*
100 * ether3 read/write. Slow things down a bit...
101 * The SEEQ8005 doesn't like us writing to its registers
102 * too quickly.
103 */
ether3_outb(int v,const void __iomem * r)104 static inline void ether3_outb(int v, const void __iomem *r)
105 {
106 writeb(v, r);
107 udelay(1);
108 }
109
ether3_outw(int v,const void __iomem * r)110 static inline void ether3_outw(int v, const void __iomem *r)
111 {
112 writew(v, r);
113 udelay(1);
114 }
115 #define ether3_inb(r) ({ unsigned int __v = readb((r)); udelay(1); __v; })
116 #define ether3_inw(r) ({ unsigned int __v = readw((r)); udelay(1); __v; })
117
118 static int
ether3_setbuffer(struct net_device * dev,buffer_rw_t read,int start)119 ether3_setbuffer(struct net_device *dev, buffer_rw_t read, int start)
120 {
121 int timeout = 1000;
122
123 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
124 ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
125
126 while ((ether3_inw(REG_STATUS) & STAT_FIFOEMPTY) == 0) {
127 if (!timeout--) {
128 printk("%s: setbuffer broken\n", dev->name);
129 priv(dev)->broken = 1;
130 return 1;
131 }
132 udelay(1);
133 }
134
135 if (read == buffer_read) {
136 ether3_outw(start, REG_DMAADDR);
137 ether3_outw(priv(dev)->regs.command | CMD_FIFOREAD, REG_COMMAND);
138 } else {
139 ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
140 ether3_outw(start, REG_DMAADDR);
141 }
142 return 0;
143 }
144
145 /*
146 * write data to the buffer memory
147 */
148 #define ether3_writebuffer(dev,data,length) \
149 writesw(REG_BUFWIN, (data), (length) >> 1)
150
151 #define ether3_writeword(dev,data) \
152 writew((data), REG_BUFWIN)
153
154 #define ether3_writelong(dev,data) { \
155 void __iomem *reg_bufwin = REG_BUFWIN; \
156 writew((data), reg_bufwin); \
157 writew((data) >> 16, reg_bufwin); \
158 }
159
160 /*
161 * read data from the buffer memory
162 */
163 #define ether3_readbuffer(dev,data,length) \
164 readsw(REG_BUFWIN, (data), (length) >> 1)
165
166 #define ether3_readword(dev) \
167 readw(REG_BUFWIN)
168
169 #define ether3_readlong(dev) \
170 readw(REG_BUFWIN) | (readw(REG_BUFWIN) << 16)
171
172 /*
173 * Switch LED off...
174 */
ether3_ledoff(unsigned long data)175 static void ether3_ledoff(unsigned long data)
176 {
177 struct net_device *dev = (struct net_device *)data;
178 ether3_outw(priv(dev)->regs.config2 |= CFG2_CTRLO, REG_CONFIG2);
179 }
180
181 /*
182 * switch LED on...
183 */
ether3_ledon(struct net_device * dev)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 priv(dev)->timer.data = (unsigned long)dev;
189 priv(dev)->timer.function = ether3_ledoff;
190 add_timer(&priv(dev)->timer);
191 if (priv(dev)->regs.config2 & CFG2_CTRLO)
192 ether3_outw(priv(dev)->regs.config2 &= ~CFG2_CTRLO, REG_CONFIG2);
193 }
194
195 /*
196 * Read the ethernet address string from the on board rom.
197 * This is an ascii string!!!
198 */
199 static int __devinit
ether3_addr(char * addr,struct expansion_card * ec)200 ether3_addr(char *addr, struct expansion_card *ec)
201 {
202 struct in_chunk_dir cd;
203 char *s;
204
205 if (ecard_readchunk(&cd, ec, 0xf5, 0) && (s = strchr(cd.d.string, '('))) {
206 int i;
207 for (i = 0; i<6; i++) {
208 addr[i] = simple_strtoul(s + 1, &s, 0x10);
209 if (*s != (i==5?')' : ':' ))
210 break;
211 }
212 if (i == 6)
213 return 0;
214 }
215 /* I wonder if we should even let the user continue in this case
216 * - no, it would be better to disable the device
217 */
218 printk(KERN_ERR "ether3: Couldn't read a valid MAC address from card.\n");
219 return -ENODEV;
220 }
221
222 /* --------------------------------------------------------------------------- */
223
224 static int __devinit
ether3_ramtest(struct net_device * dev,unsigned char byte)225 ether3_ramtest(struct net_device *dev, unsigned char byte)
226 {
227 unsigned char *buffer = kmalloc(RX_END, GFP_KERNEL);
228 int i,ret = 0;
229 int max_errors = 4;
230 int bad = -1;
231
232 if (!buffer)
233 return 1;
234
235 memset(buffer, byte, RX_END);
236 ether3_setbuffer(dev, buffer_write, 0);
237 ether3_writebuffer(dev, buffer, TX_END);
238 ether3_setbuffer(dev, buffer_write, RX_START);
239 ether3_writebuffer(dev, buffer + RX_START, RX_LEN);
240 memset(buffer, byte ^ 0xff, RX_END);
241 ether3_setbuffer(dev, buffer_read, 0);
242 ether3_readbuffer(dev, buffer, TX_END);
243 ether3_setbuffer(dev, buffer_read, RX_START);
244 ether3_readbuffer(dev, buffer + RX_START, RX_LEN);
245
246 for (i = 0; i < RX_END; i++) {
247 if (buffer[i] != byte) {
248 if (max_errors > 0 && bad != buffer[i]) {
249 printk("%s: RAM failed with (%02X instead of %02X) at 0x%04X",
250 dev->name, buffer[i], byte, i);
251 ret = 2;
252 max_errors--;
253 bad = i;
254 }
255 } else {
256 if (bad != -1) {
257 if (bad != i - 1)
258 printk(" - 0x%04X\n", i - 1);
259 printk("\n");
260 bad = -1;
261 }
262 }
263 }
264 if (bad != -1)
265 printk(" - 0xffff\n");
266 kfree(buffer);
267
268 return ret;
269 }
270
271 /* ------------------------------------------------------------------------------- */
272
ether3_init_2(struct net_device * dev)273 static int __devinit ether3_init_2(struct net_device *dev)
274 {
275 int i;
276
277 priv(dev)->regs.config1 = CFG1_RECVCOMPSTAT0|CFG1_DMABURST8;
278 priv(dev)->regs.config2 = CFG2_CTRLO|CFG2_RECVCRC|CFG2_ERRENCRC;
279 priv(dev)->regs.command = 0;
280
281 /*
282 * Set up our hardware address
283 */
284 ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
285 for (i = 0; i < 6; i++)
286 ether3_outb(dev->dev_addr[i], REG_BUFWIN);
287
288 if (dev->flags & IFF_PROMISC)
289 priv(dev)->regs.config1 |= CFG1_RECVPROMISC;
290 else if (dev->flags & IFF_MULTICAST)
291 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI;
292 else
293 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD;
294
295 /*
296 * There is a problem with the NQ8005 in that it occasionally loses the
297 * last two bytes. To get round this problem, we receive the CRC as
298 * well. That way, if we do lose the last two, then it doesn't matter.
299 */
300 ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
301 ether3_outw((TX_END>>8) - 1, REG_BUFWIN);
302 ether3_outw(priv(dev)->rx_head, REG_RECVPTR);
303 ether3_outw(0, REG_TRANSMITPTR);
304 ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND);
305 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
306 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
307 ether3_outw(priv(dev)->regs.command, REG_COMMAND);
308
309 i = ether3_ramtest(dev, 0x5A);
310 if(i)
311 return i;
312 i = ether3_ramtest(dev, 0x1E);
313 if(i)
314 return i;
315
316 ether3_setbuffer(dev, buffer_write, 0);
317 ether3_writelong(dev, 0);
318 return 0;
319 }
320
321 static void
ether3_init_for_open(struct net_device * dev)322 ether3_init_for_open(struct net_device *dev)
323 {
324 int i;
325
326 memset(&priv(dev)->stats, 0, sizeof(struct net_device_stats));
327
328 /* Reset the chip */
329 ether3_outw(CFG2_RESET, REG_CONFIG2);
330 udelay(4);
331
332 priv(dev)->regs.command = 0;
333 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
334 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
335 barrier();
336
337 ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
338 for (i = 0; i < 6; i++)
339 ether3_outb(dev->dev_addr[i], REG_BUFWIN);
340
341 priv(dev)->tx_head = 0;
342 priv(dev)->tx_tail = 0;
343 priv(dev)->regs.config2 |= CFG2_CTRLO;
344 priv(dev)->rx_head = RX_START;
345
346 ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
347 ether3_outw((TX_END>>8) - 1, REG_BUFWIN);
348 ether3_outw(priv(dev)->rx_head, REG_RECVPTR);
349 ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND);
350 ether3_outw(0, REG_TRANSMITPTR);
351 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
352 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
353
354 ether3_setbuffer(dev, buffer_write, 0);
355 ether3_writelong(dev, 0);
356
357 priv(dev)->regs.command = CMD_ENINTRX | CMD_ENINTTX;
358 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND);
359 }
360
361 static inline int
ether3_probe_bus_8(struct net_device * dev,int val)362 ether3_probe_bus_8(struct net_device *dev, int val)
363 {
364 int write_low, write_high, read_low, read_high;
365
366 write_low = val & 255;
367 write_high = val >> 8;
368
369 printk(KERN_DEBUG "ether3_probe: write8 [%02X:%02X]", write_high, write_low);
370
371 ether3_outb(write_low, REG_RECVPTR);
372 ether3_outb(write_high, REG_RECVPTR + 4);
373
374 read_low = ether3_inb(REG_RECVPTR);
375 read_high = ether3_inb(REG_RECVPTR + 4);
376
377 printk(", read8 [%02X:%02X]\n", read_high, read_low);
378
379 return read_low == write_low && read_high == write_high;
380 }
381
382 static inline int
ether3_probe_bus_16(struct net_device * dev,int val)383 ether3_probe_bus_16(struct net_device *dev, int val)
384 {
385 int read_val;
386
387 ether3_outw(val, REG_RECVPTR);
388 read_val = ether3_inw(REG_RECVPTR);
389
390 printk(KERN_DEBUG "ether3_probe: write16 [%04X], read16 [%04X]\n", val, read_val);
391
392 return read_val == val;
393 }
394
395 /*
396 * Open/initialize the board. This is called (in the current kernel)
397 * sometime after booting when the 'ifconfig' program is run.
398 *
399 * This routine should set everything up anew at each open, even
400 * registers that "should" only need to be set once at boot, so that
401 * there is non-reboot way to recover if something goes wrong.
402 */
403 static int
ether3_open(struct net_device * dev)404 ether3_open(struct net_device *dev)
405 {
406 if (!is_valid_ether_addr(dev->dev_addr)) {
407 printk(KERN_WARNING "%s: invalid ethernet MAC address\n",
408 dev->name);
409 return -EINVAL;
410 }
411
412 if (request_irq(dev->irq, ether3_interrupt, 0, "ether3", dev))
413 return -EAGAIN;
414
415 ether3_init_for_open(dev);
416
417 netif_start_queue(dev);
418
419 return 0;
420 }
421
422 /*
423 * The inverse routine to ether3_open().
424 */
425 static int
ether3_close(struct net_device * dev)426 ether3_close(struct net_device *dev)
427 {
428 netif_stop_queue(dev);
429
430 disable_irq(dev->irq);
431
432 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
433 priv(dev)->regs.command = 0;
434 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
435 barrier();
436 ether3_outb(0x80, REG_CONFIG2 + 4);
437 ether3_outw(0, REG_COMMAND);
438
439 free_irq(dev->irq, dev);
440
441 return 0;
442 }
443
444 /*
445 * Get the current statistics. This may be called with the card open or
446 * closed.
447 */
ether3_getstats(struct net_device * dev)448 static struct net_device_stats *ether3_getstats(struct net_device *dev)
449 {
450 return &priv(dev)->stats;
451 }
452
453 /*
454 * Set or clear promiscuous/multicast mode filter for this adaptor.
455 *
456 * We don't attempt any packet filtering. The card may have a SEEQ 8004
457 * in which does not have the other ethernet address registers present...
458 */
ether3_setmulticastlist(struct net_device * dev)459 static void ether3_setmulticastlist(struct net_device *dev)
460 {
461 priv(dev)->regs.config1 &= ~CFG1_RECVPROMISC;
462
463 if (dev->flags & IFF_PROMISC) {
464 /* promiscuous mode */
465 priv(dev)->regs.config1 |= CFG1_RECVPROMISC;
466 } else if (dev->flags & IFF_ALLMULTI || dev->mc_count) {
467 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI;
468 } else
469 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD;
470
471 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
472 }
473
ether3_timeout(struct net_device * dev)474 static void ether3_timeout(struct net_device *dev)
475 {
476 unsigned long flags;
477
478 del_timer(&priv(dev)->timer);
479
480 local_irq_save(flags);
481 printk(KERN_ERR "%s: transmit timed out, network cable problem?\n", dev->name);
482 printk(KERN_ERR "%s: state: { status=%04X cfg1=%04X cfg2=%04X }\n", dev->name,
483 ether3_inw(REG_STATUS), ether3_inw(REG_CONFIG1), ether3_inw(REG_CONFIG2));
484 printk(KERN_ERR "%s: { rpr=%04X rea=%04X tpr=%04X }\n", dev->name,
485 ether3_inw(REG_RECVPTR), ether3_inw(REG_RECVEND), ether3_inw(REG_TRANSMITPTR));
486 printk(KERN_ERR "%s: tx head=%X tx tail=%X\n", dev->name,
487 priv(dev)->tx_head, priv(dev)->tx_tail);
488 ether3_setbuffer(dev, buffer_read, priv(dev)->tx_tail);
489 printk(KERN_ERR "%s: packet status = %08X\n", dev->name, ether3_readlong(dev));
490 local_irq_restore(flags);
491
492 priv(dev)->regs.config2 |= CFG2_CTRLO;
493 priv(dev)->stats.tx_errors += 1;
494 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
495 priv(dev)->tx_head = priv(dev)->tx_tail = 0;
496
497 netif_wake_queue(dev);
498 }
499
500 /*
501 * Transmit a packet
502 */
503 static int
ether3_sendpacket(struct sk_buff * skb,struct net_device * dev)504 ether3_sendpacket(struct sk_buff *skb, struct net_device *dev)
505 {
506 unsigned long flags;
507 unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
508 unsigned int ptr, next_ptr;
509
510 if (priv(dev)->broken) {
511 dev_kfree_skb(skb);
512 priv(dev)->stats.tx_dropped ++;
513 netif_start_queue(dev);
514 return 0;
515 }
516
517 length = (length + 1) & ~1;
518 if (length != skb->len) {
519 if (skb_padto(skb, length))
520 goto out;
521 }
522
523 next_ptr = (priv(dev)->tx_head + 1) & 15;
524
525 local_irq_save(flags);
526
527 if (priv(dev)->tx_tail == next_ptr) {
528 local_irq_restore(flags);
529 return 1; /* unable to queue */
530 }
531
532 dev->trans_start = jiffies;
533 ptr = 0x600 * priv(dev)->tx_head;
534 priv(dev)->tx_head = next_ptr;
535 next_ptr *= 0x600;
536
537 #define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS)
538
539 ether3_setbuffer(dev, buffer_write, next_ptr);
540 ether3_writelong(dev, 0);
541 ether3_setbuffer(dev, buffer_write, ptr);
542 ether3_writelong(dev, 0);
543 ether3_writebuffer(dev, skb->data, length);
544 ether3_writeword(dev, htons(next_ptr));
545 ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16);
546 ether3_setbuffer(dev, buffer_write, ptr);
547 ether3_writeword(dev, htons((ptr + length + 4)));
548 ether3_writeword(dev, TXHDR_FLAGS >> 16);
549 ether3_ledon(dev);
550
551 if (!(ether3_inw(REG_STATUS) & STAT_TXON)) {
552 ether3_outw(ptr, REG_TRANSMITPTR);
553 ether3_outw(priv(dev)->regs.command | CMD_TXON, REG_COMMAND);
554 }
555
556 next_ptr = (priv(dev)->tx_head + 1) & 15;
557 local_irq_restore(flags);
558
559 dev_kfree_skb(skb);
560
561 if (priv(dev)->tx_tail == next_ptr)
562 netif_stop_queue(dev);
563
564 out:
565 return 0;
566 }
567
568 static irqreturn_t
ether3_interrupt(int irq,void * dev_id)569 ether3_interrupt(int irq, void *dev_id)
570 {
571 struct net_device *dev = (struct net_device *)dev_id;
572 unsigned int status, handled = IRQ_NONE;
573
574 #if NET_DEBUG > 1
575 if(net_debug & DEBUG_INT)
576 printk("eth3irq: %d ", irq);
577 #endif
578
579 status = ether3_inw(REG_STATUS);
580
581 if (status & STAT_INTRX) {
582 ether3_outw(CMD_ACKINTRX | priv(dev)->regs.command, REG_COMMAND);
583 ether3_rx(dev, 12);
584 handled = IRQ_HANDLED;
585 }
586
587 if (status & STAT_INTTX) {
588 ether3_outw(CMD_ACKINTTX | priv(dev)->regs.command, REG_COMMAND);
589 ether3_tx(dev);
590 handled = IRQ_HANDLED;
591 }
592
593 #if NET_DEBUG > 1
594 if(net_debug & DEBUG_INT)
595 printk("done\n");
596 #endif
597 return handled;
598 }
599
600 /*
601 * If we have a good packet(s), get it/them out of the buffers.
602 */
ether3_rx(struct net_device * dev,unsigned int maxcnt)603 static int ether3_rx(struct net_device *dev, unsigned int maxcnt)
604 {
605 unsigned int next_ptr = priv(dev)->rx_head, received = 0;
606
607 ether3_ledon(dev);
608
609 do {
610 unsigned int this_ptr, status;
611 unsigned char addrs[16];
612
613 /*
614 * read the first 16 bytes from the buffer.
615 * This contains the status bytes etc and ethernet addresses,
616 * and we also check the source ethernet address to see if
617 * it originated from us.
618 */
619 {
620 unsigned int temp_ptr;
621 ether3_setbuffer(dev, buffer_read, next_ptr);
622 temp_ptr = ether3_readword(dev);
623 status = ether3_readword(dev);
624 if ((status & (RXSTAT_DONE | RXHDR_CHAINCONTINUE | RXHDR_RECEIVE)) !=
625 (RXSTAT_DONE | RXHDR_CHAINCONTINUE) || !temp_ptr)
626 break;
627
628 this_ptr = next_ptr + 4;
629 next_ptr = ntohs(temp_ptr);
630 }
631 ether3_setbuffer(dev, buffer_read, this_ptr);
632 ether3_readbuffer(dev, addrs+2, 12);
633
634 if (next_ptr < RX_START || next_ptr >= RX_END) {
635 int i;
636 printk("%s: bad next pointer @%04X: ", dev->name, priv(dev)->rx_head);
637 printk("%02X %02X %02X %02X ", next_ptr >> 8, next_ptr & 255, status & 255, status >> 8);
638 for (i = 2; i < 14; i++)
639 printk("%02X ", addrs[i]);
640 printk("\n");
641 next_ptr = priv(dev)->rx_head;
642 break;
643 }
644 /*
645 * ignore our own packets...
646 */
647 if (!(*(unsigned long *)&dev->dev_addr[0] ^ *(unsigned long *)&addrs[2+6]) &&
648 !(*(unsigned short *)&dev->dev_addr[4] ^ *(unsigned short *)&addrs[2+10])) {
649 maxcnt ++; /* compensate for loopedback packet */
650 ether3_outw(next_ptr >> 8, REG_RECVEND);
651 } else
652 if (!(status & (RXSTAT_OVERSIZE|RXSTAT_CRCERROR|RXSTAT_DRIBBLEERROR|RXSTAT_SHORTPACKET))) {
653 unsigned int length = next_ptr - this_ptr;
654 struct sk_buff *skb;
655
656 if (next_ptr <= this_ptr)
657 length += RX_END - RX_START;
658
659 skb = dev_alloc_skb(length + 2);
660 if (skb) {
661 unsigned char *buf;
662
663 skb_reserve(skb, 2);
664 buf = skb_put(skb, length);
665 ether3_readbuffer(dev, buf + 12, length - 12);
666 ether3_outw(next_ptr >> 8, REG_RECVEND);
667 *(unsigned short *)(buf + 0) = *(unsigned short *)(addrs + 2);
668 *(unsigned long *)(buf + 2) = *(unsigned long *)(addrs + 4);
669 *(unsigned long *)(buf + 6) = *(unsigned long *)(addrs + 8);
670 *(unsigned short *)(buf + 10) = *(unsigned short *)(addrs + 12);
671 skb->protocol = eth_type_trans(skb, dev);
672 netif_rx(skb);
673 received ++;
674 } else
675 goto dropping;
676 } else {
677 struct net_device_stats *stats = &priv(dev)->stats;
678 ether3_outw(next_ptr >> 8, REG_RECVEND);
679 if (status & RXSTAT_OVERSIZE) stats->rx_over_errors ++;
680 if (status & RXSTAT_CRCERROR) stats->rx_crc_errors ++;
681 if (status & RXSTAT_DRIBBLEERROR) stats->rx_fifo_errors ++;
682 if (status & RXSTAT_SHORTPACKET) stats->rx_length_errors ++;
683 stats->rx_errors++;
684 }
685 }
686 while (-- maxcnt);
687
688 done:
689 priv(dev)->stats.rx_packets += received;
690 priv(dev)->rx_head = next_ptr;
691 /*
692 * If rx went off line, then that means that the buffer may be full. We
693 * have dropped at least one packet.
694 */
695 if (!(ether3_inw(REG_STATUS) & STAT_RXON)) {
696 priv(dev)->stats.rx_dropped ++;
697 ether3_outw(next_ptr, REG_RECVPTR);
698 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND);
699 }
700
701 return maxcnt;
702
703 dropping:{
704 static unsigned long last_warned;
705
706 ether3_outw(next_ptr >> 8, REG_RECVEND);
707 /*
708 * Don't print this message too many times...
709 */
710 if (time_after(jiffies, last_warned + 10 * HZ)) {
711 last_warned = jiffies;
712 printk("%s: memory squeeze, dropping packet.\n", dev->name);
713 }
714 priv(dev)->stats.rx_dropped ++;
715 goto done;
716 }
717 }
718
719 /*
720 * Update stats for the transmitted packet(s)
721 */
ether3_tx(struct net_device * dev)722 static void ether3_tx(struct net_device *dev)
723 {
724 unsigned int tx_tail = priv(dev)->tx_tail;
725 int max_work = 14;
726
727 do {
728 unsigned long status;
729
730 /*
731 * Read the packet header
732 */
733 ether3_setbuffer(dev, buffer_read, tx_tail * 0x600);
734 status = ether3_readlong(dev);
735
736 /*
737 * Check to see if this packet has been transmitted
738 */
739 if ((status & (TXSTAT_DONE | TXHDR_TRANSMIT)) !=
740 (TXSTAT_DONE | TXHDR_TRANSMIT))
741 break;
742
743 /*
744 * Update errors
745 */
746 if (!(status & (TXSTAT_BABBLED | TXSTAT_16COLLISIONS)))
747 priv(dev)->stats.tx_packets++;
748 else {
749 priv(dev)->stats.tx_errors ++;
750 if (status & TXSTAT_16COLLISIONS)
751 priv(dev)->stats.collisions += 16;
752 if (status & TXSTAT_BABBLED)
753 priv(dev)->stats.tx_fifo_errors ++;
754 }
755
756 tx_tail = (tx_tail + 1) & 15;
757 } while (--max_work);
758
759 if (priv(dev)->tx_tail != tx_tail) {
760 priv(dev)->tx_tail = tx_tail;
761 netif_wake_queue(dev);
762 }
763 }
764
ether3_banner(void)765 static void __devinit ether3_banner(void)
766 {
767 static unsigned version_printed = 0;
768
769 if (net_debug && version_printed++ == 0)
770 printk(KERN_INFO "%s", version);
771 }
772
773 static int __devinit
ether3_probe(struct expansion_card * ec,const struct ecard_id * id)774 ether3_probe(struct expansion_card *ec, const struct ecard_id *id)
775 {
776 const struct ether3_data *data = id->data;
777 struct net_device *dev;
778 int bus_type, ret;
779
780 ether3_banner();
781
782 ret = ecard_request_resources(ec);
783 if (ret)
784 goto out;
785
786 dev = alloc_etherdev(sizeof(struct dev_priv));
787 if (!dev) {
788 ret = -ENOMEM;
789 goto release;
790 }
791
792 SET_NETDEV_DEV(dev, &ec->dev);
793
794 priv(dev)->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
795 if (!priv(dev)->base) {
796 ret = -ENOMEM;
797 goto free;
798 }
799
800 ec->irqaddr = priv(dev)->base + data->base_offset;
801 ec->irqmask = 0xf0;
802
803 priv(dev)->seeq = priv(dev)->base + data->base_offset;
804 dev->irq = ec->irq;
805
806 ether3_addr(dev->dev_addr, ec);
807
808 init_timer(&priv(dev)->timer);
809
810 /* Reset card...
811 */
812 ether3_outb(0x80, REG_CONFIG2 + 4);
813 bus_type = BUS_UNKNOWN;
814 udelay(4);
815
816 /* Test using Receive Pointer (16-bit register) to find out
817 * how the ether3 is connected to the bus...
818 */
819 if (ether3_probe_bus_8(dev, 0x100) &&
820 ether3_probe_bus_8(dev, 0x201))
821 bus_type = BUS_8;
822
823 if (bus_type == BUS_UNKNOWN &&
824 ether3_probe_bus_16(dev, 0x101) &&
825 ether3_probe_bus_16(dev, 0x201))
826 bus_type = BUS_16;
827
828 switch (bus_type) {
829 case BUS_UNKNOWN:
830 printk(KERN_ERR "%s: unable to identify bus width\n", dev->name);
831 ret = -ENODEV;
832 goto free;
833
834 case BUS_8:
835 printk(KERN_ERR "%s: %s found, but is an unsupported "
836 "8-bit card\n", dev->name, data->name);
837 ret = -ENODEV;
838 goto free;
839
840 default:
841 break;
842 }
843
844 if (ether3_init_2(dev)) {
845 ret = -ENODEV;
846 goto free;
847 }
848
849 dev->open = ether3_open;
850 dev->stop = ether3_close;
851 dev->hard_start_xmit = ether3_sendpacket;
852 dev->get_stats = ether3_getstats;
853 dev->set_multicast_list = ether3_setmulticastlist;
854 dev->tx_timeout = ether3_timeout;
855 dev->watchdog_timeo = 5 * HZ / 100;
856
857 ret = register_netdev(dev);
858 if (ret)
859 goto free;
860
861 printk("%s: %s in slot %d, %pM\n",
862 dev->name, data->name, ec->slot_no, dev->dev_addr);
863
864 ecard_set_drvdata(ec, dev);
865 return 0;
866
867 free:
868 free_netdev(dev);
869 release:
870 ecard_release_resources(ec);
871 out:
872 return ret;
873 }
874
ether3_remove(struct expansion_card * ec)875 static void __devexit ether3_remove(struct expansion_card *ec)
876 {
877 struct net_device *dev = ecard_get_drvdata(ec);
878
879 ecard_set_drvdata(ec, NULL);
880
881 unregister_netdev(dev);
882 free_netdev(dev);
883 ecard_release_resources(ec);
884 }
885
886 static struct ether3_data ether3 = {
887 .name = "ether3",
888 .base_offset = 0,
889 };
890
891 static struct ether3_data etherb = {
892 .name = "etherb",
893 .base_offset = 0x800,
894 };
895
896 static const struct ecard_id ether3_ids[] = {
897 { MANU_ANT2, PROD_ANT_ETHER3, ðer3 },
898 { MANU_ANT, PROD_ANT_ETHER3, ðer3 },
899 { MANU_ANT, PROD_ANT_ETHERB, ðerb },
900 { 0xffff, 0xffff }
901 };
902
903 static struct ecard_driver ether3_driver = {
904 .probe = ether3_probe,
905 .remove = __devexit_p(ether3_remove),
906 .id_table = ether3_ids,
907 .drv = {
908 .name = "ether3",
909 },
910 };
911
ether3_init(void)912 static int __init ether3_init(void)
913 {
914 return ecard_register_driver(ðer3_driver);
915 }
916
ether3_exit(void)917 static void __exit ether3_exit(void)
918 {
919 ecard_remove_driver(ðer3_driver);
920 }
921
922 module_init(ether3_init);
923 module_exit(ether3_exit);
924
925 MODULE_LICENSE("GPL");
926