1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27#include <linux/module.h>
28#include <linux/moduleparam.h>
29#include <linux/init.h>
30#include <linux/ioport.h>
31#include <linux/delay.h>
32#include <linux/netdevice.h>
33#include <asm/io.h>
34#include <linux/arcdevice.h>
35
36
37#define VERSION "arcnet: COM90xx chipset support\n"
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52#undef FAST_PROBE
53
54
55
56static int com90xx_found(int ioaddr, int airq, u_long shmem, void __iomem *);
57static void com90xx_command(struct net_device *dev, int command);
58static int com90xx_status(struct net_device *dev);
59static void com90xx_setmask(struct net_device *dev, int mask);
60static int com90xx_reset(struct net_device *dev, int really_reset);
61static void com90xx_copy_to_card(struct net_device *dev, int bufnum, int offset,
62 void *buf, int count);
63static void com90xx_copy_from_card(struct net_device *dev, int bufnum, int offset,
64 void *buf, int count);
65
66
67
68static struct net_device *cards[16];
69static int numcards;
70
71
72
73
74#define ARCNET_TOTAL_SIZE 16
75
76
77#define BUFFER_SIZE (512)
78#define MIRROR_SIZE (BUFFER_SIZE*4)
79
80
81#define _INTMASK (ioaddr+0)
82#define _STATUS (ioaddr+0)
83#define _COMMAND (ioaddr+1)
84#define _CONFIG (ioaddr+2)
85#define _RESET (ioaddr+8)
86#define _MEMDATA (ioaddr+12)
87#define _ADDR_HI (ioaddr+15)
88#define _ADDR_LO (ioaddr+14)
89
90#undef ASTATUS
91#undef ACOMMAND
92#undef AINTMASK
93
94#define ASTATUS() inb(_STATUS)
95#define ACOMMAND(cmd) outb((cmd),_COMMAND)
96#define AINTMASK(msk) outb((msk),_INTMASK)
97
98
99static int com90xx_skip_probe __initdata = 0;
100
101
102
103static int io;
104static int irq;
105static int shmem;
106static char device[9];
107
108module_param(io, int, 0);
109module_param(irq, int, 0);
110module_param(shmem, int, 0);
111module_param_string(device, device, sizeof(device), 0);
112
113static void __init com90xx_probe(void)
114{
115 int count, status, ioaddr, numprint, airq, openparen = 0;
116 unsigned long airqmask;
117 int ports[(0x3f0 - 0x200) / 16 + 1] =
118 {0};
119 unsigned long *shmems;
120 void __iomem **iomem;
121 int numports, numshmems, *port;
122 u_long *p;
123 int index;
124
125 if (!io && !irq && !shmem && !*device && com90xx_skip_probe)
126 return;
127
128 shmems = kzalloc(((0x100000-0xa0000) / 0x800) * sizeof(unsigned long),
129 GFP_KERNEL);
130 if (!shmems)
131 return;
132 iomem = kzalloc(((0x100000-0xa0000) / 0x800) * sizeof(void __iomem *),
133 GFP_KERNEL);
134 if (!iomem) {
135 kfree(shmems);
136 return;
137 }
138
139 BUGLVL(D_NORMAL) printk(VERSION);
140
141
142 numports = numshmems = 0;
143 if (io)
144 ports[numports++] = io;
145 else
146 for (count = 0x200; count <= 0x3f0; count += 16)
147 ports[numports++] = count;
148 if (shmem)
149 shmems[numshmems++] = shmem;
150 else
151 for (count = 0xA0000; count <= 0xFF800; count += 2048)
152 shmems[numshmems++] = count;
153
154
155
156
157 numprint = -1;
158 for (port = &ports[0]; port - ports < numports; port++) {
159 numprint++;
160 numprint %= 8;
161 if (!numprint) {
162 BUGMSG2(D_INIT, "\n");
163 BUGMSG2(D_INIT, "S1: ");
164 }
165 BUGMSG2(D_INIT, "%Xh ", *port);
166
167 ioaddr = *port;
168
169 if (!request_region(*port, ARCNET_TOTAL_SIZE, "arcnet (90xx)")) {
170 BUGMSG2(D_INIT_REASONS, "(request_region)\n");
171 BUGMSG2(D_INIT_REASONS, "S1: ");
172 BUGLVL(D_INIT_REASONS) numprint = 0;
173 *port-- = ports[--numports];
174 continue;
175 }
176 if (ASTATUS() == 0xFF) {
177 BUGMSG2(D_INIT_REASONS, "(empty)\n");
178 BUGMSG2(D_INIT_REASONS, "S1: ");
179 BUGLVL(D_INIT_REASONS) numprint = 0;
180 release_region(*port, ARCNET_TOTAL_SIZE);
181 *port-- = ports[--numports];
182 continue;
183 }
184 inb(_RESET);
185
186 BUGMSG2(D_INIT_REASONS, "\n");
187 BUGMSG2(D_INIT_REASONS, "S1: ");
188 BUGLVL(D_INIT_REASONS) numprint = 0;
189 }
190 BUGMSG2(D_INIT, "\n");
191
192 if (!numports) {
193 BUGMSG2(D_NORMAL, "S1: No ARCnet cards found.\n");
194 kfree(shmems);
195 kfree(iomem);
196 return;
197 }
198
199
200
201
202 numprint = -1;
203 for (port = &ports[0]; port < ports + numports; port++) {
204 numprint++;
205 numprint %= 8;
206 if (!numprint) {
207 BUGMSG2(D_INIT, "\n");
208 BUGMSG2(D_INIT, "S2: ");
209 }
210 BUGMSG2(D_INIT, "%Xh ", *port);
211 }
212 BUGMSG2(D_INIT, "\n");
213 mdelay(RESETtime);
214
215
216
217
218 numprint = -1;
219 for (index = 0, p = &shmems[0]; index < numshmems; p++, index++) {
220 void __iomem *base;
221
222 numprint++;
223 numprint %= 8;
224 if (!numprint) {
225 BUGMSG2(D_INIT, "\n");
226 BUGMSG2(D_INIT, "S3: ");
227 }
228 BUGMSG2(D_INIT, "%lXh ", *p);
229
230 if (!request_mem_region(*p, MIRROR_SIZE, "arcnet (90xx)")) {
231 BUGMSG2(D_INIT_REASONS, "(request_mem_region)\n");
232 BUGMSG2(D_INIT_REASONS, "Stage 3: ");
233 BUGLVL(D_INIT_REASONS) numprint = 0;
234 goto out;
235 }
236 base = ioremap(*p, MIRROR_SIZE);
237 if (!base) {
238 BUGMSG2(D_INIT_REASONS, "(ioremap)\n");
239 BUGMSG2(D_INIT_REASONS, "Stage 3: ");
240 BUGLVL(D_INIT_REASONS) numprint = 0;
241 goto out1;
242 }
243 if (readb(base) != TESTvalue) {
244 BUGMSG2(D_INIT_REASONS, "(%02Xh != %02Xh)\n",
245 readb(base), TESTvalue);
246 BUGMSG2(D_INIT_REASONS, "S3: ");
247 BUGLVL(D_INIT_REASONS) numprint = 0;
248 goto out2;
249 }
250
251
252
253
254
255 writeb(0x42, base);
256 if (readb(base) != 0x42) {
257 BUGMSG2(D_INIT_REASONS, "(read only)\n");
258 BUGMSG2(D_INIT_REASONS, "S3: ");
259 goto out2;
260 }
261 BUGMSG2(D_INIT_REASONS, "\n");
262 BUGMSG2(D_INIT_REASONS, "S3: ");
263 BUGLVL(D_INIT_REASONS) numprint = 0;
264 iomem[index] = base;
265 continue;
266 out2:
267 iounmap(base);
268 out1:
269 release_mem_region(*p, MIRROR_SIZE);
270 out:
271 *p-- = shmems[--numshmems];
272 index--;
273 }
274 BUGMSG2(D_INIT, "\n");
275
276 if (!numshmems) {
277 BUGMSG2(D_NORMAL, "S3: No ARCnet cards found.\n");
278 for (port = &ports[0]; port < ports + numports; port++)
279 release_region(*port, ARCNET_TOTAL_SIZE);
280 kfree(shmems);
281 kfree(iomem);
282 return;
283 }
284
285
286
287 numprint = -1;
288 for (p = &shmems[0]; p < shmems + numshmems; p++) {
289 numprint++;
290 numprint %= 8;
291 if (!numprint) {
292 BUGMSG2(D_INIT, "\n");
293 BUGMSG2(D_INIT, "S4: ");
294 }
295 BUGMSG2(D_INIT, "%lXh ", *p);
296 }
297 BUGMSG2(D_INIT, "\n");
298
299
300
301
302
303
304
305
306 numprint = -1;
307 for (port = &ports[0]; port < ports + numports; port++) {
308 int found = 0;
309 numprint++;
310 numprint %= 8;
311 if (!numprint) {
312 BUGMSG2(D_INIT, "\n");
313 BUGMSG2(D_INIT, "S5: ");
314 }
315 BUGMSG2(D_INIT, "%Xh ", *port);
316
317 ioaddr = *port;
318 status = ASTATUS();
319
320 if ((status & 0x9D)
321 != (NORXflag | RECONflag | TXFREEflag | RESETflag)) {
322 BUGMSG2(D_INIT_REASONS, "(status=%Xh)\n", status);
323 BUGMSG2(D_INIT_REASONS, "S5: ");
324 BUGLVL(D_INIT_REASONS) numprint = 0;
325 release_region(*port, ARCNET_TOTAL_SIZE);
326 *port-- = ports[--numports];
327 continue;
328 }
329 ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear);
330 status = ASTATUS();
331 if (status & RESETflag) {
332 BUGMSG2(D_INIT_REASONS, " (eternal reset, status=%Xh)\n",
333 status);
334 BUGMSG2(D_INIT_REASONS, "S5: ");
335 BUGLVL(D_INIT_REASONS) numprint = 0;
336 release_region(*port, ARCNET_TOTAL_SIZE);
337 *port-- = ports[--numports];
338 continue;
339 }
340
341
342
343 if (!irq) {
344
345
346
347
348 airqmask = probe_irq_on();
349 AINTMASK(NORXflag);
350 udelay(1);
351 AINTMASK(0);
352 airq = probe_irq_off(airqmask);
353
354 if (airq <= 0) {
355 BUGMSG2(D_INIT_REASONS, "(airq=%d)\n", airq);
356 BUGMSG2(D_INIT_REASONS, "S5: ");
357 BUGLVL(D_INIT_REASONS) numprint = 0;
358 release_region(*port, ARCNET_TOTAL_SIZE);
359 *port-- = ports[--numports];
360 continue;
361 }
362 } else {
363 airq = irq;
364 }
365
366 BUGMSG2(D_INIT, "(%d,", airq);
367 openparen = 1;
368
369
370
371
372
373
374
375#ifdef FAST_PROBE
376 if (numports > 1 || numshmems > 1) {
377 inb(_RESET);
378 mdelay(RESETtime);
379 } else {
380
381 writeb(TESTvalue, iomem[0]);
382 }
383#else
384 inb(_RESET);
385 mdelay(RESETtime);
386#endif
387
388 for (index = 0; index < numshmems; index++) {
389 u_long ptr = shmems[index];
390 void __iomem *base = iomem[index];
391
392 if (readb(base) == TESTvalue) {
393 BUGMSG2(D_INIT, "%lXh)\n", *p);
394 openparen = 0;
395
396
397 if (com90xx_found(*port, airq, ptr, base) == 0)
398 found = 1;
399 numprint = -1;
400
401
402 shmems[index] = shmems[--numshmems];
403 iomem[index] = iomem[numshmems];
404 break;
405 } else {
406 BUGMSG2(D_INIT_REASONS, "%Xh-", readb(base));
407 }
408 }
409
410 if (openparen) {
411 BUGLVL(D_INIT) printk("no matching shmem)\n");
412 BUGLVL(D_INIT_REASONS) printk("S5: ");
413 BUGLVL(D_INIT_REASONS) numprint = 0;
414 }
415 if (!found)
416 release_region(*port, ARCNET_TOTAL_SIZE);
417 *port-- = ports[--numports];
418 }
419
420 BUGLVL(D_INIT_REASONS) printk("\n");
421
422
423 for (index = 0; index < numshmems; index++) {
424 writeb(TESTvalue, iomem[index]);
425 iounmap(iomem[index]);
426 release_mem_region(shmems[index], MIRROR_SIZE);
427 }
428 kfree(shmems);
429 kfree(iomem);
430}
431
432static int check_mirror(unsigned long addr, size_t size)
433{
434 void __iomem *p;
435 int res = -1;
436
437 if (!request_mem_region(addr, size, "arcnet (90xx)"))
438 return -1;
439
440 p = ioremap(addr, size);
441 if (p) {
442 if (readb(p) == TESTvalue)
443 res = 1;
444 else
445 res = 0;
446 iounmap(p);
447 }
448
449 release_mem_region(addr, size);
450 return res;
451}
452
453
454
455
456static int __init com90xx_found(int ioaddr, int airq, u_long shmem, void __iomem *p)
457{
458 struct net_device *dev = NULL;
459 struct arcnet_local *lp;
460 u_long first_mirror, last_mirror;
461 int mirror_size;
462
463
464 dev = alloc_arcdev(device);
465 if (!dev) {
466 BUGMSG2(D_NORMAL, "com90xx: Can't allocate device!\n");
467 iounmap(p);
468 release_mem_region(shmem, MIRROR_SIZE);
469 return -ENOMEM;
470 }
471 lp = netdev_priv(dev);
472
473
474
475
476
477
478 mirror_size = MIRROR_SIZE;
479 if (readb(p) == TESTvalue &&
480 check_mirror(shmem - MIRROR_SIZE, MIRROR_SIZE) == 0 &&
481 check_mirror(shmem - 2 * MIRROR_SIZE, MIRROR_SIZE) == 1)
482 mirror_size = 2 * MIRROR_SIZE;
483
484 first_mirror = shmem - mirror_size;
485 while (check_mirror(first_mirror, mirror_size) == 1)
486 first_mirror -= mirror_size;
487 first_mirror += mirror_size;
488
489 last_mirror = shmem + mirror_size;
490 while (check_mirror(last_mirror, mirror_size) == 1)
491 last_mirror += mirror_size;
492 last_mirror -= mirror_size;
493
494 dev->mem_start = first_mirror;
495 dev->mem_end = last_mirror + MIRROR_SIZE - 1;
496
497 iounmap(p);
498 release_mem_region(shmem, MIRROR_SIZE);
499
500 if (!request_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1, "arcnet (90xx)"))
501 goto err_free_dev;
502
503
504 if (request_irq(airq, &arcnet_interrupt, 0, "arcnet (90xx)", dev)) {
505 BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", airq);
506 goto err_release_mem;
507 }
508 dev->irq = airq;
509
510
511 lp->card_name = "COM90xx";
512 lp->hw.command = com90xx_command;
513 lp->hw.status = com90xx_status;
514 lp->hw.intmask = com90xx_setmask;
515 lp->hw.reset = com90xx_reset;
516 lp->hw.owner = THIS_MODULE;
517 lp->hw.copy_to_card = com90xx_copy_to_card;
518 lp->hw.copy_from_card = com90xx_copy_from_card;
519 lp->mem_start = ioremap(dev->mem_start, dev->mem_end - dev->mem_start + 1);
520 if (!lp->mem_start) {
521 BUGMSG(D_NORMAL, "Can't remap device memory!\n");
522 goto err_free_irq;
523 }
524
525
526 dev->dev_addr[0] = readb(lp->mem_start + 1);
527
528 dev->base_addr = ioaddr;
529
530 BUGMSG(D_NORMAL, "COM90xx station %02Xh found at %03lXh, IRQ %d, "
531 "ShMem %lXh (%ld*%xh).\n",
532 dev->dev_addr[0],
533 dev->base_addr, dev->irq, dev->mem_start,
534 (dev->mem_end - dev->mem_start + 1) / mirror_size, mirror_size);
535
536 if (register_netdev(dev))
537 goto err_unmap;
538
539 cards[numcards++] = dev;
540 return 0;
541
542err_unmap:
543 iounmap(lp->mem_start);
544err_free_irq:
545 free_irq(dev->irq, dev);
546err_release_mem:
547 release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
548err_free_dev:
549 free_netdev(dev);
550 return -EIO;
551}
552
553
554static void com90xx_command(struct net_device *dev, int cmd)
555{
556 short ioaddr = dev->base_addr;
557
558 ACOMMAND(cmd);
559}
560
561
562static int com90xx_status(struct net_device *dev)
563{
564 short ioaddr = dev->base_addr;
565
566 return ASTATUS();
567}
568
569
570static void com90xx_setmask(struct net_device *dev, int mask)
571{
572 short ioaddr = dev->base_addr;
573
574 AINTMASK(mask);
575}
576
577
578
579
580
581
582
583
584
585
586static int com90xx_reset(struct net_device *dev, int really_reset)
587{
588 struct arcnet_local *lp = netdev_priv(dev);
589 short ioaddr = dev->base_addr;
590
591 BUGMSG(D_INIT, "Resetting (status=%02Xh)\n", ASTATUS());
592
593 if (really_reset) {
594
595 inb(_RESET);
596 mdelay(RESETtime);
597 }
598 ACOMMAND(CFLAGScmd | RESETclear);
599 ACOMMAND(CFLAGScmd | CONFIGclear);
600
601
602
603
604
605 if (readb(lp->mem_start) != TESTvalue) {
606 if (really_reset)
607 BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n");
608 return 1;
609 }
610
611 ACOMMAND(CONFIGcmd | EXTconf);
612
613
614 BUGLVL(D_DURING)
615 memset_io(lp->mem_start, 0x42, 2048);
616
617
618 return 0;
619}
620
621static void com90xx_copy_to_card(struct net_device *dev, int bufnum, int offset,
622 void *buf, int count)
623{
624 struct arcnet_local *lp = netdev_priv(dev);
625 void __iomem *memaddr = lp->mem_start + bufnum * 512 + offset;
626 TIME("memcpy_toio", count, memcpy_toio(memaddr, buf, count));
627}
628
629
630static void com90xx_copy_from_card(struct net_device *dev, int bufnum, int offset,
631 void *buf, int count)
632{
633 struct arcnet_local *lp = netdev_priv(dev);
634 void __iomem *memaddr = lp->mem_start + bufnum * 512 + offset;
635 TIME("memcpy_fromio", count, memcpy_fromio(buf, memaddr, count));
636}
637
638
639MODULE_LICENSE("GPL");
640
641static int __init com90xx_init(void)
642{
643 if (irq == 2)
644 irq = 9;
645 com90xx_probe();
646 if (!numcards)
647 return -EIO;
648 return 0;
649}
650
651static void __exit com90xx_exit(void)
652{
653 struct net_device *dev;
654 struct arcnet_local *lp;
655 int count;
656
657 for (count = 0; count < numcards; count++) {
658 dev = cards[count];
659 lp = netdev_priv(dev);
660
661 unregister_netdev(dev);
662 free_irq(dev->irq, dev);
663 iounmap(lp->mem_start);
664 release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
665 release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
666 free_netdev(dev);
667 }
668}
669
670module_init(com90xx_init);
671module_exit(com90xx_exit);
672
673#ifndef MODULE
674static int __init com90xx_setup(char *s)
675{
676 int ints[8];
677
678 s = get_options(s, 8, ints);
679 if (!ints[0] && !*s) {
680 printk("com90xx: Disabled.\n");
681 return 1;
682 }
683
684 switch (ints[0]) {
685 default:
686 printk("com90xx: Too many arguments.\n");
687 case 3:
688 shmem = ints[3];
689 case 2:
690 irq = ints[2];
691 case 1:
692 io = ints[1];
693 }
694
695 if (*s)
696 snprintf(device, sizeof(device), "%s", s);
697
698 return 1;
699}
700
701__setup("com90xx=", com90xx_setup);
702#endif
703