blob: b80fbe40aa0e2b16b25fec455dd10e43c65ac355 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Linux ARCnet driver - COM90xx chipset (memory-mapped buffers)
3 *
4 * Written 1994-1999 by Avery Pennarun.
5 * Written 1999 by Martin Mares <mj@ucw.cz>.
6 * Derived from skeleton.c by Donald Becker.
7 *
8 * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
9 * for sponsoring the further development of this driver.
10 *
11 * **********************
12 *
13 * The original copyright of skeleton.c was as follows:
14 *
15 * skeleton.c Written 1993 by Donald Becker.
16 * Copyright 1993 United States Government as represented by the
17 * Director, National Security Agency. This software may only be used
18 * and distributed according to the terms of the GNU General Public License as
19 * modified by SRC, incorporated herein by reference.
20 *
21 * **********************
22 *
23 * For more details, see drivers/net/arcnet.c
24 *
25 * **********************
26 */
27#include <linux/module.h>
28#include <linux/moduleparam.h>
29#include <linux/init.h>
Alexey Dobriyana6b7a402011-06-06 10:43:46 +000030#include <linux/interrupt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <linux/ioport.h>
32#include <linux/delay.h>
33#include <linux/netdevice.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090034#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include <asm/io.h>
36#include <linux/arcdevice.h>
37
38
39#define VERSION "arcnet: COM90xx chipset support\n"
40
41
42/* Define this to speed up the autoprobe by assuming if only one io port and
43 * shmem are left in the list at Stage 5, they must correspond to each
44 * other.
45 *
46 * This is undefined by default because it might not always be true, and the
47 * extra check makes the autoprobe even more careful. Speed demons can turn
48 * it on - I think it should be fine if you only have one ARCnet card
49 * installed.
50 *
51 * If no ARCnet cards are installed, this delay never happens anyway and thus
52 * the option has no effect.
53 */
54#undef FAST_PROBE
55
56
57/* Internal function declarations */
Al Virod0f6eca2005-12-02 03:54:44 -050058static int com90xx_found(int ioaddr, int airq, u_long shmem, void __iomem *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070059static void com90xx_command(struct net_device *dev, int command);
60static int com90xx_status(struct net_device *dev);
61static void com90xx_setmask(struct net_device *dev, int mask);
62static int com90xx_reset(struct net_device *dev, int really_reset);
63static void com90xx_copy_to_card(struct net_device *dev, int bufnum, int offset,
64 void *buf, int count);
65static void com90xx_copy_from_card(struct net_device *dev, int bufnum, int offset,
66 void *buf, int count);
67
68/* Known ARCnet cards */
69
70static struct net_device *cards[16];
71static int numcards;
72
73/* Handy defines for ARCnet specific stuff */
74
75/* The number of low I/O ports used by the card */
76#define ARCNET_TOTAL_SIZE 16
77
78/* Amount of I/O memory used by the card */
79#define BUFFER_SIZE (512)
80#define MIRROR_SIZE (BUFFER_SIZE*4)
81
82/* COM 9026 controller chip --> ARCnet register addresses */
83#define _INTMASK (ioaddr+0) /* writable */
84#define _STATUS (ioaddr+0) /* readable */
85#define _COMMAND (ioaddr+1) /* writable, returns random vals on read (?) */
86#define _CONFIG (ioaddr+2) /* Configuration register */
87#define _RESET (ioaddr+8) /* software reset (on read) */
88#define _MEMDATA (ioaddr+12) /* Data port for IO-mapped memory */
89#define _ADDR_HI (ioaddr+15) /* Control registers for said */
90#define _ADDR_LO (ioaddr+14)
91
92#undef ASTATUS
93#undef ACOMMAND
94#undef AINTMASK
95
96#define ASTATUS() inb(_STATUS)
97#define ACOMMAND(cmd) outb((cmd),_COMMAND)
98#define AINTMASK(msk) outb((msk),_INTMASK)
99
100
101static int com90xx_skip_probe __initdata = 0;
102
103/* Module parameters */
104
105static int io; /* use the insmod io= irq= shmem= options */
106static int irq;
107static int shmem;
108static char device[9]; /* use eg. device=arc1 to change name */
109
110module_param(io, int, 0);
111module_param(irq, int, 0);
112module_param(shmem, int, 0);
113module_param_string(device, device, sizeof(device), 0);
114
115static void __init com90xx_probe(void)
116{
117 int count, status, ioaddr, numprint, airq, openparen = 0;
118 unsigned long airqmask;
119 int ports[(0x3f0 - 0x200) / 16 + 1] =
120 {0};
Al Virod0f6eca2005-12-02 03:54:44 -0500121 unsigned long *shmems;
122 void __iomem **iomem;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 int numports, numshmems, *port;
124 u_long *p;
Al Virod0f6eca2005-12-02 03:54:44 -0500125 int index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
127 if (!io && !irq && !shmem && !*device && com90xx_skip_probe)
128 return;
129
Andrew Morton15901dc2006-04-01 00:49:35 -0800130 shmems = kzalloc(((0x100000-0xa0000) / 0x800) * sizeof(unsigned long),
Al Virod0f6eca2005-12-02 03:54:44 -0500131 GFP_KERNEL);
132 if (!shmems)
133 return;
Andrew Morton15901dc2006-04-01 00:49:35 -0800134 iomem = kzalloc(((0x100000-0xa0000) / 0x800) * sizeof(void __iomem *),
Al Virod0f6eca2005-12-02 03:54:44 -0500135 GFP_KERNEL);
136 if (!iomem) {
137 kfree(shmems);
138 return;
139 }
140
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 BUGLVL(D_NORMAL) printk(VERSION);
142
143 /* set up the arrays where we'll store the possible probe addresses */
144 numports = numshmems = 0;
145 if (io)
146 ports[numports++] = io;
147 else
148 for (count = 0x200; count <= 0x3f0; count += 16)
149 ports[numports++] = count;
150 if (shmem)
151 shmems[numshmems++] = shmem;
152 else
153 for (count = 0xA0000; count <= 0xFF800; count += 2048)
154 shmems[numshmems++] = count;
155
156 /* Stage 1: abandon any reserved ports, or ones with status==0xFF
157 * (empty), and reset any others by reading the reset port.
158 */
159 numprint = -1;
160 for (port = &ports[0]; port - ports < numports; port++) {
161 numprint++;
162 numprint %= 8;
163 if (!numprint) {
164 BUGMSG2(D_INIT, "\n");
165 BUGMSG2(D_INIT, "S1: ");
166 }
167 BUGMSG2(D_INIT, "%Xh ", *port);
168
169 ioaddr = *port;
170
171 if (!request_region(*port, ARCNET_TOTAL_SIZE, "arcnet (90xx)")) {
172 BUGMSG2(D_INIT_REASONS, "(request_region)\n");
173 BUGMSG2(D_INIT_REASONS, "S1: ");
174 BUGLVL(D_INIT_REASONS) numprint = 0;
175 *port-- = ports[--numports];
176 continue;
177 }
178 if (ASTATUS() == 0xFF) {
179 BUGMSG2(D_INIT_REASONS, "(empty)\n");
180 BUGMSG2(D_INIT_REASONS, "S1: ");
181 BUGLVL(D_INIT_REASONS) numprint = 0;
182 release_region(*port, ARCNET_TOTAL_SIZE);
183 *port-- = ports[--numports];
184 continue;
185 }
186 inb(_RESET); /* begin resetting card */
187
188 BUGMSG2(D_INIT_REASONS, "\n");
189 BUGMSG2(D_INIT_REASONS, "S1: ");
190 BUGLVL(D_INIT_REASONS) numprint = 0;
191 }
192 BUGMSG2(D_INIT, "\n");
193
194 if (!numports) {
195 BUGMSG2(D_NORMAL, "S1: No ARCnet cards found.\n");
Al Virod0f6eca2005-12-02 03:54:44 -0500196 kfree(shmems);
197 kfree(iomem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 return;
199 }
200 /* Stage 2: we have now reset any possible ARCnet cards, so we can't
201 * do anything until they finish. If D_INIT, print the list of
202 * cards that are left.
203 */
204 numprint = -1;
205 for (port = &ports[0]; port < ports + numports; port++) {
206 numprint++;
207 numprint %= 8;
208 if (!numprint) {
209 BUGMSG2(D_INIT, "\n");
210 BUGMSG2(D_INIT, "S2: ");
211 }
212 BUGMSG2(D_INIT, "%Xh ", *port);
213 }
214 BUGMSG2(D_INIT, "\n");
215 mdelay(RESETtime);
216
217 /* Stage 3: abandon any shmem addresses that don't have the signature
218 * 0xD1 byte in the right place, or are read-only.
219 */
220 numprint = -1;
Al Virod0f6eca2005-12-02 03:54:44 -0500221 for (index = 0, p = &shmems[0]; index < numshmems; p++, index++) {
222 void __iomem *base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
224 numprint++;
225 numprint %= 8;
226 if (!numprint) {
227 BUGMSG2(D_INIT, "\n");
228 BUGMSG2(D_INIT, "S3: ");
229 }
230 BUGMSG2(D_INIT, "%lXh ", *p);
231
Al Virod0f6eca2005-12-02 03:54:44 -0500232 if (!request_mem_region(*p, MIRROR_SIZE, "arcnet (90xx)")) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 BUGMSG2(D_INIT_REASONS, "(request_mem_region)\n");
234 BUGMSG2(D_INIT_REASONS, "Stage 3: ");
235 BUGLVL(D_INIT_REASONS) numprint = 0;
Al Virod0f6eca2005-12-02 03:54:44 -0500236 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 }
Al Virod0f6eca2005-12-02 03:54:44 -0500238 base = ioremap(*p, MIRROR_SIZE);
239 if (!base) {
240 BUGMSG2(D_INIT_REASONS, "(ioremap)\n");
241 BUGMSG2(D_INIT_REASONS, "Stage 3: ");
242 BUGLVL(D_INIT_REASONS) numprint = 0;
243 goto out1;
244 }
245 if (readb(base) != TESTvalue) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 BUGMSG2(D_INIT_REASONS, "(%02Xh != %02Xh)\n",
Al Virod0f6eca2005-12-02 03:54:44 -0500247 readb(base), TESTvalue);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 BUGMSG2(D_INIT_REASONS, "S3: ");
249 BUGLVL(D_INIT_REASONS) numprint = 0;
Al Virod0f6eca2005-12-02 03:54:44 -0500250 goto out2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 }
252 /* By writing 0x42 to the TESTvalue location, we also make
253 * sure no "mirror" shmem areas show up - if they occur
254 * in another pass through this loop, they will be discarded
255 * because *cptr != TESTvalue.
256 */
Al Virod0f6eca2005-12-02 03:54:44 -0500257 writeb(0x42, base);
258 if (readb(base) != 0x42) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 BUGMSG2(D_INIT_REASONS, "(read only)\n");
260 BUGMSG2(D_INIT_REASONS, "S3: ");
Al Virod0f6eca2005-12-02 03:54:44 -0500261 goto out2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 }
263 BUGMSG2(D_INIT_REASONS, "\n");
264 BUGMSG2(D_INIT_REASONS, "S3: ");
265 BUGLVL(D_INIT_REASONS) numprint = 0;
Al Virod0f6eca2005-12-02 03:54:44 -0500266 iomem[index] = base;
267 continue;
268 out2:
269 iounmap(base);
270 out1:
271 release_mem_region(*p, MIRROR_SIZE);
272 out:
273 *p-- = shmems[--numshmems];
274 index--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 }
276 BUGMSG2(D_INIT, "\n");
277
278 if (!numshmems) {
279 BUGMSG2(D_NORMAL, "S3: No ARCnet cards found.\n");
280 for (port = &ports[0]; port < ports + numports; port++)
281 release_region(*port, ARCNET_TOTAL_SIZE);
Al Virod0f6eca2005-12-02 03:54:44 -0500282 kfree(shmems);
283 kfree(iomem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 return;
285 }
286 /* Stage 4: something of a dummy, to report the shmems that are
287 * still possible after stage 3.
288 */
289 numprint = -1;
290 for (p = &shmems[0]; p < shmems + numshmems; p++) {
291 numprint++;
292 numprint %= 8;
293 if (!numprint) {
294 BUGMSG2(D_INIT, "\n");
295 BUGMSG2(D_INIT, "S4: ");
296 }
297 BUGMSG2(D_INIT, "%lXh ", *p);
298 }
299 BUGMSG2(D_INIT, "\n");
300
301 /* Stage 5: for any ports that have the correct status, can disable
302 * the RESET flag, and (if no irq is given) generate an autoirq,
303 * register an ARCnet device.
304 *
305 * Currently, we can only register one device per probe, so quit
306 * after the first one is found.
307 */
308 numprint = -1;
309 for (port = &ports[0]; port < ports + numports; port++) {
310 int found = 0;
311 numprint++;
312 numprint %= 8;
313 if (!numprint) {
314 BUGMSG2(D_INIT, "\n");
315 BUGMSG2(D_INIT, "S5: ");
316 }
317 BUGMSG2(D_INIT, "%Xh ", *port);
318
319 ioaddr = *port;
320 status = ASTATUS();
321
322 if ((status & 0x9D)
323 != (NORXflag | RECONflag | TXFREEflag | RESETflag)) {
324 BUGMSG2(D_INIT_REASONS, "(status=%Xh)\n", status);
325 BUGMSG2(D_INIT_REASONS, "S5: ");
326 BUGLVL(D_INIT_REASONS) numprint = 0;
327 release_region(*port, ARCNET_TOTAL_SIZE);
328 *port-- = ports[--numports];
329 continue;
330 }
331 ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear);
332 status = ASTATUS();
333 if (status & RESETflag) {
334 BUGMSG2(D_INIT_REASONS, " (eternal reset, status=%Xh)\n",
335 status);
336 BUGMSG2(D_INIT_REASONS, "S5: ");
337 BUGLVL(D_INIT_REASONS) numprint = 0;
338 release_region(*port, ARCNET_TOTAL_SIZE);
339 *port-- = ports[--numports];
340 continue;
341 }
342 /* skip this completely if an IRQ was given, because maybe
343 * we're on a machine that locks during autoirq!
344 */
345 if (!irq) {
346 /* if we do this, we're sure to get an IRQ since the
347 * card has just reset and the NORXflag is on until
348 * we tell it to start receiving.
349 */
350 airqmask = probe_irq_on();
351 AINTMASK(NORXflag);
352 udelay(1);
353 AINTMASK(0);
354 airq = probe_irq_off(airqmask);
355
356 if (airq <= 0) {
357 BUGMSG2(D_INIT_REASONS, "(airq=%d)\n", airq);
358 BUGMSG2(D_INIT_REASONS, "S5: ");
359 BUGLVL(D_INIT_REASONS) numprint = 0;
360 release_region(*port, ARCNET_TOTAL_SIZE);
361 *port-- = ports[--numports];
362 continue;
363 }
364 } else {
365 airq = irq;
366 }
367
368 BUGMSG2(D_INIT, "(%d,", airq);
369 openparen = 1;
370
371 /* Everything seems okay. But which shmem, if any, puts
372 * back its signature byte when the card is reset?
373 *
374 * If there are multiple cards installed, there might be
375 * multiple shmems still in the list.
376 */
377#ifdef FAST_PROBE
378 if (numports > 1 || numshmems > 1) {
379 inb(_RESET);
380 mdelay(RESETtime);
381 } else {
382 /* just one shmem and port, assume they match */
Al Virod0f6eca2005-12-02 03:54:44 -0500383 writeb(TESTvalue, iomem[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 }
385#else
386 inb(_RESET);
387 mdelay(RESETtime);
388#endif
389
Al Virod0f6eca2005-12-02 03:54:44 -0500390 for (index = 0; index < numshmems; index++) {
391 u_long ptr = shmems[index];
392 void __iomem *base = iomem[index];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393
Al Virod0f6eca2005-12-02 03:54:44 -0500394 if (readb(base) == TESTvalue) { /* found one */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 BUGMSG2(D_INIT, "%lXh)\n", *p);
396 openparen = 0;
397
398 /* register the card */
Al Virod0f6eca2005-12-02 03:54:44 -0500399 if (com90xx_found(*port, airq, ptr, base) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 found = 1;
401 numprint = -1;
402
403 /* remove shmem from the list */
Al Virod0f6eca2005-12-02 03:54:44 -0500404 shmems[index] = shmems[--numshmems];
405 iomem[index] = iomem[numshmems];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 break; /* go to the next I/O port */
407 } else {
Al Virod0f6eca2005-12-02 03:54:44 -0500408 BUGMSG2(D_INIT_REASONS, "%Xh-", readb(base));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 }
410 }
411
412 if (openparen) {
413 BUGLVL(D_INIT) printk("no matching shmem)\n");
414 BUGLVL(D_INIT_REASONS) printk("S5: ");
415 BUGLVL(D_INIT_REASONS) numprint = 0;
416 }
417 if (!found)
418 release_region(*port, ARCNET_TOTAL_SIZE);
419 *port-- = ports[--numports];
420 }
421
422 BUGLVL(D_INIT_REASONS) printk("\n");
423
424 /* Now put back TESTvalue on all leftover shmems. */
Al Virod0f6eca2005-12-02 03:54:44 -0500425 for (index = 0; index < numshmems; index++) {
426 writeb(TESTvalue, iomem[index]);
427 iounmap(iomem[index]);
428 release_mem_region(shmems[index], MIRROR_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 }
Al Virod0f6eca2005-12-02 03:54:44 -0500430 kfree(shmems);
431 kfree(iomem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432}
433
Al Virod0f6eca2005-12-02 03:54:44 -0500434static int check_mirror(unsigned long addr, size_t size)
435{
436 void __iomem *p;
437 int res = -1;
438
439 if (!request_mem_region(addr, size, "arcnet (90xx)"))
440 return -1;
441
442 p = ioremap(addr, size);
443 if (p) {
444 if (readb(p) == TESTvalue)
445 res = 1;
446 else
447 res = 0;
448 iounmap(p);
449 }
450
451 release_mem_region(addr, size);
452 return res;
453}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454
455/* Set up the struct net_device associated with this card. Called after
456 * probing succeeds.
457 */
Al Virod0f6eca2005-12-02 03:54:44 -0500458static int __init com90xx_found(int ioaddr, int airq, u_long shmem, void __iomem *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459{
460 struct net_device *dev = NULL;
461 struct arcnet_local *lp;
462 u_long first_mirror, last_mirror;
463 int mirror_size;
464
465 /* allocate struct net_device */
466 dev = alloc_arcdev(device);
467 if (!dev) {
468 BUGMSG2(D_NORMAL, "com90xx: Can't allocate device!\n");
Al Virod0f6eca2005-12-02 03:54:44 -0500469 iounmap(p);
470 release_mem_region(shmem, MIRROR_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 return -ENOMEM;
472 }
Wang Chen454d7c92008-11-12 23:37:49 -0800473 lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 /* find the real shared memory start/end points, including mirrors */
475
476 /* guess the actual size of one "memory mirror" - the number of
477 * bytes between copies of the shared memory. On most cards, it's
478 * 2k (or there are no mirrors at all) but on some, it's 4k.
479 */
480 mirror_size = MIRROR_SIZE;
Al Virod0f6eca2005-12-02 03:54:44 -0500481 if (readb(p) == TESTvalue &&
482 check_mirror(shmem - MIRROR_SIZE, MIRROR_SIZE) == 0 &&
483 check_mirror(shmem - 2 * MIRROR_SIZE, MIRROR_SIZE) == 1)
484 mirror_size = 2 * MIRROR_SIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485
Al Virod0f6eca2005-12-02 03:54:44 -0500486 first_mirror = shmem - mirror_size;
487 while (check_mirror(first_mirror, mirror_size) == 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 first_mirror -= mirror_size;
489 first_mirror += mirror_size;
490
Al Virod0f6eca2005-12-02 03:54:44 -0500491 last_mirror = shmem + mirror_size;
492 while (check_mirror(last_mirror, mirror_size) == 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 last_mirror += mirror_size;
494 last_mirror -= mirror_size;
495
496 dev->mem_start = first_mirror;
497 dev->mem_end = last_mirror + MIRROR_SIZE - 1;
498
Al Virod0f6eca2005-12-02 03:54:44 -0500499 iounmap(p);
500 release_mem_region(shmem, MIRROR_SIZE);
501
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 if (!request_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1, "arcnet (90xx)"))
503 goto err_free_dev;
504
505 /* reserve the irq */
Joe Perchesa0607fd2009-11-18 23:29:17 -0800506 if (request_irq(airq, arcnet_interrupt, 0, "arcnet (90xx)", dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", airq);
508 goto err_release_mem;
509 }
510 dev->irq = airq;
511
512 /* Initialize the rest of the device structure. */
513 lp->card_name = "COM90xx";
514 lp->hw.command = com90xx_command;
515 lp->hw.status = com90xx_status;
516 lp->hw.intmask = com90xx_setmask;
517 lp->hw.reset = com90xx_reset;
518 lp->hw.owner = THIS_MODULE;
519 lp->hw.copy_to_card = com90xx_copy_to_card;
520 lp->hw.copy_from_card = com90xx_copy_from_card;
521 lp->mem_start = ioremap(dev->mem_start, dev->mem_end - dev->mem_start + 1);
522 if (!lp->mem_start) {
523 BUGMSG(D_NORMAL, "Can't remap device memory!\n");
524 goto err_free_irq;
525 }
526
527 /* get and check the station ID from offset 1 in shmem */
528 dev->dev_addr[0] = readb(lp->mem_start + 1);
529
530 dev->base_addr = ioaddr;
531
532 BUGMSG(D_NORMAL, "COM90xx station %02Xh found at %03lXh, IRQ %d, "
533 "ShMem %lXh (%ld*%xh).\n",
534 dev->dev_addr[0],
535 dev->base_addr, dev->irq, dev->mem_start,
536 (dev->mem_end - dev->mem_start + 1) / mirror_size, mirror_size);
537
538 if (register_netdev(dev))
539 goto err_unmap;
540
541 cards[numcards++] = dev;
542 return 0;
543
544err_unmap:
545 iounmap(lp->mem_start);
546err_free_irq:
547 free_irq(dev->irq, dev);
548err_release_mem:
549 release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
550err_free_dev:
551 free_netdev(dev);
552 return -EIO;
553}
554
555
556static void com90xx_command(struct net_device *dev, int cmd)
557{
558 short ioaddr = dev->base_addr;
559
560 ACOMMAND(cmd);
561}
562
563
564static int com90xx_status(struct net_device *dev)
565{
566 short ioaddr = dev->base_addr;
567
568 return ASTATUS();
569}
570
571
572static void com90xx_setmask(struct net_device *dev, int mask)
573{
574 short ioaddr = dev->base_addr;
575
576 AINTMASK(mask);
577}
578
579
580/*
581 * Do a hardware reset on the card, and set up necessary registers.
582 *
583 * This should be called as little as possible, because it disrupts the
584 * token on the network (causes a RECON) and requires a significant delay.
585 *
586 * However, it does make sure the card is in a defined state.
587 */
Hannes Eder888432f2008-12-25 23:57:21 -0800588static int com90xx_reset(struct net_device *dev, int really_reset)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589{
Wang Chen454d7c92008-11-12 23:37:49 -0800590 struct arcnet_local *lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 short ioaddr = dev->base_addr;
592
593 BUGMSG(D_INIT, "Resetting (status=%02Xh)\n", ASTATUS());
594
595 if (really_reset) {
596 /* reset the card */
597 inb(_RESET);
598 mdelay(RESETtime);
599 }
600 ACOMMAND(CFLAGScmd | RESETclear); /* clear flags & end reset */
601 ACOMMAND(CFLAGScmd | CONFIGclear);
602
603 /* don't do this until we verify that it doesn't hurt older cards! */
604 /* outb(inb(_CONFIG) | ENABLE16flag, _CONFIG); */
605
606 /* verify that the ARCnet signature byte is present */
607 if (readb(lp->mem_start) != TESTvalue) {
608 if (really_reset)
609 BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n");
610 return 1;
611 }
612 /* enable extended (512-byte) packets */
613 ACOMMAND(CONFIGcmd | EXTconf);
614
615 /* clean out all the memory to make debugging make more sense :) */
616 BUGLVL(D_DURING)
617 memset_io(lp->mem_start, 0x42, 2048);
618
619 /* done! return success. */
620 return 0;
621}
622
623static void com90xx_copy_to_card(struct net_device *dev, int bufnum, int offset,
624 void *buf, int count)
625{
Wang Chen454d7c92008-11-12 23:37:49 -0800626 struct arcnet_local *lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 void __iomem *memaddr = lp->mem_start + bufnum * 512 + offset;
628 TIME("memcpy_toio", count, memcpy_toio(memaddr, buf, count));
629}
630
631
632static void com90xx_copy_from_card(struct net_device *dev, int bufnum, int offset,
633 void *buf, int count)
634{
Wang Chen454d7c92008-11-12 23:37:49 -0800635 struct arcnet_local *lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 void __iomem *memaddr = lp->mem_start + bufnum * 512 + offset;
637 TIME("memcpy_fromio", count, memcpy_fromio(buf, memaddr, count));
638}
639
640
641MODULE_LICENSE("GPL");
642
643static int __init com90xx_init(void)
644{
645 if (irq == 2)
646 irq = 9;
647 com90xx_probe();
648 if (!numcards)
649 return -EIO;
650 return 0;
651}
652
653static void __exit com90xx_exit(void)
654{
655 struct net_device *dev;
656 struct arcnet_local *lp;
657 int count;
658
659 for (count = 0; count < numcards; count++) {
660 dev = cards[count];
Wang Chen454d7c92008-11-12 23:37:49 -0800661 lp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662
663 unregister_netdev(dev);
664 free_irq(dev->irq, dev);
665 iounmap(lp->mem_start);
666 release_region(dev->base_addr, ARCNET_TOTAL_SIZE);
667 release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);
668 free_netdev(dev);
669 }
670}
671
672module_init(com90xx_init);
673module_exit(com90xx_exit);
674
675#ifndef MODULE
676static int __init com90xx_setup(char *s)
677{
678 int ints[8];
679
680 s = get_options(s, 8, ints);
681 if (!ints[0] && !*s) {
682 printk("com90xx: Disabled.\n");
683 return 1;
684 }
685
686 switch (ints[0]) {
687 default: /* ERROR */
688 printk("com90xx: Too many arguments.\n");
689 case 3: /* Mem address */
690 shmem = ints[3];
691 case 2: /* IRQ */
692 irq = ints[2];
693 case 1: /* IO address */
694 io = ints[1];
695 }
696
697 if (*s)
698 snprintf(device, sizeof(device), "%s", s);
699
700 return 1;
701}
702
703__setup("com90xx=", com90xx_setup);
704#endif