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1da177e4 LT |
1 | /* |
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> | |
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 | /* Define this to speed up the autoprobe by assuming if only one io port and | |
41 | * shmem are left in the list at Stage 5, they must correspond to each | |
42 | * other. | |
43 | * | |
44 | * This is undefined by default because it might not always be true, and the | |
45 | * extra check makes the autoprobe even more careful. Speed demons can turn | |
46 | * it on - I think it should be fine if you only have one ARCnet card | |
47 | * installed. | |
48 | * | |
49 | * If no ARCnet cards are installed, this delay never happens anyway and thus | |
50 | * the option has no effect. | |
51 | */ | |
52 | #undef FAST_PROBE | |
53 | ||
54 | ||
55 | /* Internal function declarations */ | |
d0f6ecad | 56 | static int com90xx_found(int ioaddr, int airq, u_long shmem, void __iomem *); |
1da177e4 LT |
57 | static void com90xx_command(struct net_device *dev, int command); |
58 | static int com90xx_status(struct net_device *dev); | |
59 | static void com90xx_setmask(struct net_device *dev, int mask); | |
60 | static int com90xx_reset(struct net_device *dev, int really_reset); | |
61 | static void com90xx_copy_to_card(struct net_device *dev, int bufnum, int offset, | |
62 | void *buf, int count); | |
63 | static void com90xx_copy_from_card(struct net_device *dev, int bufnum, int offset, | |
64 | void *buf, int count); | |
65 | ||
66 | /* Known ARCnet cards */ | |
67 | ||
68 | static struct net_device *cards[16]; | |
69 | static int numcards; | |
70 | ||
71 | /* Handy defines for ARCnet specific stuff */ | |
72 | ||
73 | /* The number of low I/O ports used by the card */ | |
74 | #define ARCNET_TOTAL_SIZE 16 | |
75 | ||
76 | /* Amount of I/O memory used by the card */ | |
77 | #define BUFFER_SIZE (512) | |
78 | #define MIRROR_SIZE (BUFFER_SIZE*4) | |
79 | ||
80 | /* COM 9026 controller chip --> ARCnet register addresses */ | |
81 | #define _INTMASK (ioaddr+0) /* writable */ | |
82 | #define _STATUS (ioaddr+0) /* readable */ | |
83 | #define _COMMAND (ioaddr+1) /* writable, returns random vals on read (?) */ | |
84 | #define _CONFIG (ioaddr+2) /* Configuration register */ | |
85 | #define _RESET (ioaddr+8) /* software reset (on read) */ | |
86 | #define _MEMDATA (ioaddr+12) /* Data port for IO-mapped memory */ | |
87 | #define _ADDR_HI (ioaddr+15) /* Control registers for said */ | |
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 | ||
99 | static int com90xx_skip_probe __initdata = 0; | |
100 | ||
101 | /* Module parameters */ | |
102 | ||
103 | static int io; /* use the insmod io= irq= shmem= options */ | |
104 | static int irq; | |
105 | static int shmem; | |
106 | static char device[9]; /* use eg. device=arc1 to change name */ | |
107 | ||
108 | module_param(io, int, 0); | |
109 | module_param(irq, int, 0); | |
110 | module_param(shmem, int, 0); | |
111 | module_param_string(device, device, sizeof(device), 0); | |
112 | ||
113 | static 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}; | |
d0f6ecad AV |
119 | unsigned long *shmems; |
120 | void __iomem **iomem; | |
1da177e4 LT |
121 | int numports, numshmems, *port; |
122 | u_long *p; | |
d0f6ecad | 123 | int index; |
1da177e4 LT |
124 | |
125 | if (!io && !irq && !shmem && !*device && com90xx_skip_probe) | |
126 | return; | |
127 | ||
15901dc9 | 128 | shmems = kzalloc(((0x100000-0xa0000) / 0x800) * sizeof(unsigned long), |
d0f6ecad AV |
129 | GFP_KERNEL); |
130 | if (!shmems) | |
131 | return; | |
15901dc9 | 132 | iomem = kzalloc(((0x100000-0xa0000) / 0x800) * sizeof(void __iomem *), |
d0f6ecad AV |
133 | GFP_KERNEL); |
134 | if (!iomem) { | |
135 | kfree(shmems); | |
136 | return; | |
137 | } | |
138 | ||
1da177e4 LT |
139 | BUGLVL(D_NORMAL) printk(VERSION); |
140 | ||
141 | /* set up the arrays where we'll store the possible probe addresses */ | |
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 | /* Stage 1: abandon any reserved ports, or ones with status==0xFF | |
155 | * (empty), and reset any others by reading the reset port. | |
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); /* begin resetting card */ | |
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"); | |
d0f6ecad AV |
194 | kfree(shmems); |
195 | kfree(iomem); | |
1da177e4 LT |
196 | return; |
197 | } | |
198 | /* Stage 2: we have now reset any possible ARCnet cards, so we can't | |
199 | * do anything until they finish. If D_INIT, print the list of | |
200 | * cards that are left. | |
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 | /* Stage 3: abandon any shmem addresses that don't have the signature | |
216 | * 0xD1 byte in the right place, or are read-only. | |
217 | */ | |
218 | numprint = -1; | |
d0f6ecad AV |
219 | for (index = 0, p = &shmems[0]; index < numshmems; p++, index++) { |
220 | void __iomem *base; | |
1da177e4 LT |
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 | ||
d0f6ecad | 230 | if (!request_mem_region(*p, MIRROR_SIZE, "arcnet (90xx)")) { |
1da177e4 LT |
231 | BUGMSG2(D_INIT_REASONS, "(request_mem_region)\n"); |
232 | BUGMSG2(D_INIT_REASONS, "Stage 3: "); | |
233 | BUGLVL(D_INIT_REASONS) numprint = 0; | |
d0f6ecad AV |
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; | |
1da177e4 | 242 | } |
d0f6ecad | 243 | if (readb(base) != TESTvalue) { |
1da177e4 | 244 | BUGMSG2(D_INIT_REASONS, "(%02Xh != %02Xh)\n", |
d0f6ecad | 245 | readb(base), TESTvalue); |
1da177e4 LT |
246 | BUGMSG2(D_INIT_REASONS, "S3: "); |
247 | BUGLVL(D_INIT_REASONS) numprint = 0; | |
d0f6ecad | 248 | goto out2; |
1da177e4 LT |
249 | } |
250 | /* By writing 0x42 to the TESTvalue location, we also make | |
251 | * sure no "mirror" shmem areas show up - if they occur | |
252 | * in another pass through this loop, they will be discarded | |
253 | * because *cptr != TESTvalue. | |
254 | */ | |
d0f6ecad AV |
255 | writeb(0x42, base); |
256 | if (readb(base) != 0x42) { | |
1da177e4 LT |
257 | BUGMSG2(D_INIT_REASONS, "(read only)\n"); |
258 | BUGMSG2(D_INIT_REASONS, "S3: "); | |
d0f6ecad | 259 | goto out2; |
1da177e4 LT |
260 | } |
261 | BUGMSG2(D_INIT_REASONS, "\n"); | |
262 | BUGMSG2(D_INIT_REASONS, "S3: "); | |
263 | BUGLVL(D_INIT_REASONS) numprint = 0; | |
d0f6ecad AV |
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--; | |
1da177e4 LT |
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); | |
d0f6ecad AV |
280 | kfree(shmems); |
281 | kfree(iomem); | |
1da177e4 LT |
282 | return; |
283 | } | |
284 | /* Stage 4: something of a dummy, to report the shmems that are | |
285 | * still possible after stage 3. | |
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 | /* Stage 5: for any ports that have the correct status, can disable | |
300 | * the RESET flag, and (if no irq is given) generate an autoirq, | |
301 | * register an ARCnet device. | |
302 | * | |
303 | * Currently, we can only register one device per probe, so quit | |
304 | * after the first one is found. | |
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 | /* skip this completely if an IRQ was given, because maybe | |
341 | * we're on a machine that locks during autoirq! | |
342 | */ | |
343 | if (!irq) { | |
344 | /* if we do this, we're sure to get an IRQ since the | |
345 | * card has just reset and the NORXflag is on until | |
346 | * we tell it to start receiving. | |
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 | /* Everything seems okay. But which shmem, if any, puts | |
370 | * back its signature byte when the card is reset? | |
371 | * | |
372 | * If there are multiple cards installed, there might be | |
373 | * multiple shmems still in the list. | |
374 | */ | |
375 | #ifdef FAST_PROBE | |
376 | if (numports > 1 || numshmems > 1) { | |
377 | inb(_RESET); | |
378 | mdelay(RESETtime); | |
379 | } else { | |
380 | /* just one shmem and port, assume they match */ | |
d0f6ecad | 381 | writeb(TESTvalue, iomem[0]); |
1da177e4 LT |
382 | } |
383 | #else | |
384 | inb(_RESET); | |
385 | mdelay(RESETtime); | |
386 | #endif | |
387 | ||
d0f6ecad AV |
388 | for (index = 0; index < numshmems; index++) { |
389 | u_long ptr = shmems[index]; | |
390 | void __iomem *base = iomem[index]; | |
1da177e4 | 391 | |
d0f6ecad | 392 | if (readb(base) == TESTvalue) { /* found one */ |
1da177e4 LT |
393 | BUGMSG2(D_INIT, "%lXh)\n", *p); |
394 | openparen = 0; | |
395 | ||
396 | /* register the card */ | |
d0f6ecad | 397 | if (com90xx_found(*port, airq, ptr, base) == 0) |
1da177e4 LT |
398 | found = 1; |
399 | numprint = -1; | |
400 | ||
401 | /* remove shmem from the list */ | |
d0f6ecad AV |
402 | shmems[index] = shmems[--numshmems]; |
403 | iomem[index] = iomem[numshmems]; | |
1da177e4 LT |
404 | break; /* go to the next I/O port */ |
405 | } else { | |
d0f6ecad | 406 | BUGMSG2(D_INIT_REASONS, "%Xh-", readb(base)); |
1da177e4 LT |
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 | /* Now put back TESTvalue on all leftover shmems. */ | |
d0f6ecad AV |
423 | for (index = 0; index < numshmems; index++) { |
424 | writeb(TESTvalue, iomem[index]); | |
425 | iounmap(iomem[index]); | |
426 | release_mem_region(shmems[index], MIRROR_SIZE); | |
1da177e4 | 427 | } |
d0f6ecad AV |
428 | kfree(shmems); |
429 | kfree(iomem); | |
1da177e4 LT |
430 | } |
431 | ||
d0f6ecad AV |
432 | static 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 | } | |
1da177e4 LT |
452 | |
453 | /* Set up the struct net_device associated with this card. Called after | |
454 | * probing succeeds. | |
455 | */ | |
d0f6ecad | 456 | static int __init com90xx_found(int ioaddr, int airq, u_long shmem, void __iomem *p) |
1da177e4 LT |
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 | /* allocate struct net_device */ | |
464 | dev = alloc_arcdev(device); | |
465 | if (!dev) { | |
466 | BUGMSG2(D_NORMAL, "com90xx: Can't allocate device!\n"); | |
d0f6ecad AV |
467 | iounmap(p); |
468 | release_mem_region(shmem, MIRROR_SIZE); | |
1da177e4 LT |
469 | return -ENOMEM; |
470 | } | |
454d7c9b | 471 | lp = netdev_priv(dev); |
1da177e4 LT |
472 | /* find the real shared memory start/end points, including mirrors */ |
473 | ||
474 | /* guess the actual size of one "memory mirror" - the number of | |
475 | * bytes between copies of the shared memory. On most cards, it's | |
476 | * 2k (or there are no mirrors at all) but on some, it's 4k. | |
477 | */ | |
478 | mirror_size = MIRROR_SIZE; | |
d0f6ecad AV |
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; | |
1da177e4 | 483 | |
d0f6ecad AV |
484 | first_mirror = shmem - mirror_size; |
485 | while (check_mirror(first_mirror, mirror_size) == 1) | |
1da177e4 LT |
486 | first_mirror -= mirror_size; |
487 | first_mirror += mirror_size; | |
488 | ||
d0f6ecad AV |
489 | last_mirror = shmem + mirror_size; |
490 | while (check_mirror(last_mirror, mirror_size) == 1) | |
1da177e4 LT |
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 | ||
d0f6ecad AV |
497 | iounmap(p); |
498 | release_mem_region(shmem, MIRROR_SIZE); | |
499 | ||
1da177e4 LT |
500 | if (!request_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1, "arcnet (90xx)")) |
501 | goto err_free_dev; | |
502 | ||
503 | /* reserve the irq */ | |
a0607fd3 | 504 | if (request_irq(airq, arcnet_interrupt, 0, "arcnet (90xx)", dev)) { |
1da177e4 LT |
505 | BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", airq); |
506 | goto err_release_mem; | |
507 | } | |
508 | dev->irq = airq; | |
509 | ||
510 | /* Initialize the rest of the device structure. */ | |
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 | /* get and check the station ID from offset 1 in shmem */ | |
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 | ||
542 | err_unmap: | |
543 | iounmap(lp->mem_start); | |
544 | err_free_irq: | |
545 | free_irq(dev->irq, dev); | |
546 | err_release_mem: | |
547 | release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1); | |
548 | err_free_dev: | |
549 | free_netdev(dev); | |
550 | return -EIO; | |
551 | } | |
552 | ||
553 | ||
554 | static void com90xx_command(struct net_device *dev, int cmd) | |
555 | { | |
556 | short ioaddr = dev->base_addr; | |
557 | ||
558 | ACOMMAND(cmd); | |
559 | } | |
560 | ||
561 | ||
562 | static int com90xx_status(struct net_device *dev) | |
563 | { | |
564 | short ioaddr = dev->base_addr; | |
565 | ||
566 | return ASTATUS(); | |
567 | } | |
568 | ||
569 | ||
570 | static 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 | * Do a hardware reset on the card, and set up necessary registers. | |
580 | * | |
581 | * This should be called as little as possible, because it disrupts the | |
582 | * token on the network (causes a RECON) and requires a significant delay. | |
583 | * | |
584 | * However, it does make sure the card is in a defined state. | |
585 | */ | |
888432f6 | 586 | static int com90xx_reset(struct net_device *dev, int really_reset) |
1da177e4 | 587 | { |
454d7c9b | 588 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
589 | short ioaddr = dev->base_addr; |
590 | ||
591 | BUGMSG(D_INIT, "Resetting (status=%02Xh)\n", ASTATUS()); | |
592 | ||
593 | if (really_reset) { | |
594 | /* reset the card */ | |
595 | inb(_RESET); | |
596 | mdelay(RESETtime); | |
597 | } | |
598 | ACOMMAND(CFLAGScmd | RESETclear); /* clear flags & end reset */ | |
599 | ACOMMAND(CFLAGScmd | CONFIGclear); | |
600 | ||
601 | /* don't do this until we verify that it doesn't hurt older cards! */ | |
602 | /* outb(inb(_CONFIG) | ENABLE16flag, _CONFIG); */ | |
603 | ||
604 | /* verify that the ARCnet signature byte is present */ | |
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 | /* enable extended (512-byte) packets */ | |
611 | ACOMMAND(CONFIGcmd | EXTconf); | |
612 | ||
613 | /* clean out all the memory to make debugging make more sense :) */ | |
614 | BUGLVL(D_DURING) | |
615 | memset_io(lp->mem_start, 0x42, 2048); | |
616 | ||
617 | /* done! return success. */ | |
618 | return 0; | |
619 | } | |
620 | ||
621 | static void com90xx_copy_to_card(struct net_device *dev, int bufnum, int offset, | |
622 | void *buf, int count) | |
623 | { | |
454d7c9b | 624 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
625 | void __iomem *memaddr = lp->mem_start + bufnum * 512 + offset; |
626 | TIME("memcpy_toio", count, memcpy_toio(memaddr, buf, count)); | |
627 | } | |
628 | ||
629 | ||
630 | static void com90xx_copy_from_card(struct net_device *dev, int bufnum, int offset, | |
631 | void *buf, int count) | |
632 | { | |
454d7c9b | 633 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
634 | void __iomem *memaddr = lp->mem_start + bufnum * 512 + offset; |
635 | TIME("memcpy_fromio", count, memcpy_fromio(buf, memaddr, count)); | |
636 | } | |
637 | ||
638 | ||
639 | MODULE_LICENSE("GPL"); | |
640 | ||
641 | static 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 | ||
651 | static 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]; | |
454d7c9b | 659 | lp = netdev_priv(dev); |
1da177e4 LT |
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 | ||
670 | module_init(com90xx_init); | |
671 | module_exit(com90xx_exit); | |
672 | ||
673 | #ifndef MODULE | |
674 | static 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: /* ERROR */ | |
686 | printk("com90xx: Too many arguments.\n"); | |
687 | case 3: /* Mem address */ | |
688 | shmem = ints[3]; | |
689 | case 2: /* IRQ */ | |
690 | irq = ints[2]; | |
691 | case 1: /* IO address */ | |
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 |