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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> | |
5a0e3ad6 | 33 | #include <linux/slab.h> |
1da177e4 LT |
34 | #include <asm/io.h> |
35 | #include <linux/arcdevice.h> | |
36 | ||
37 | ||
38 | #define VERSION "arcnet: COM90xx chipset support\n" | |
39 | ||
40 | ||
41 | /* Define this to speed up the autoprobe by assuming if only one io port and | |
42 | * shmem are left in the list at Stage 5, they must correspond to each | |
43 | * other. | |
44 | * | |
45 | * This is undefined by default because it might not always be true, and the | |
46 | * extra check makes the autoprobe even more careful. Speed demons can turn | |
47 | * it on - I think it should be fine if you only have one ARCnet card | |
48 | * installed. | |
49 | * | |
50 | * If no ARCnet cards are installed, this delay never happens anyway and thus | |
51 | * the option has no effect. | |
52 | */ | |
53 | #undef FAST_PROBE | |
54 | ||
55 | ||
56 | /* Internal function declarations */ | |
d0f6ecad | 57 | static int com90xx_found(int ioaddr, int airq, u_long shmem, void __iomem *); |
1da177e4 LT |
58 | static void com90xx_command(struct net_device *dev, int command); |
59 | static int com90xx_status(struct net_device *dev); | |
60 | static void com90xx_setmask(struct net_device *dev, int mask); | |
61 | static int com90xx_reset(struct net_device *dev, int really_reset); | |
62 | static void com90xx_copy_to_card(struct net_device *dev, int bufnum, int offset, | |
63 | void *buf, int count); | |
64 | static void com90xx_copy_from_card(struct net_device *dev, int bufnum, int offset, | |
65 | void *buf, int count); | |
66 | ||
67 | /* Known ARCnet cards */ | |
68 | ||
69 | static struct net_device *cards[16]; | |
70 | static int numcards; | |
71 | ||
72 | /* Handy defines for ARCnet specific stuff */ | |
73 | ||
74 | /* The number of low I/O ports used by the card */ | |
75 | #define ARCNET_TOTAL_SIZE 16 | |
76 | ||
77 | /* Amount of I/O memory used by the card */ | |
78 | #define BUFFER_SIZE (512) | |
79 | #define MIRROR_SIZE (BUFFER_SIZE*4) | |
80 | ||
81 | /* COM 9026 controller chip --> ARCnet register addresses */ | |
82 | #define _INTMASK (ioaddr+0) /* writable */ | |
83 | #define _STATUS (ioaddr+0) /* readable */ | |
84 | #define _COMMAND (ioaddr+1) /* writable, returns random vals on read (?) */ | |
85 | #define _CONFIG (ioaddr+2) /* Configuration register */ | |
86 | #define _RESET (ioaddr+8) /* software reset (on read) */ | |
87 | #define _MEMDATA (ioaddr+12) /* Data port for IO-mapped memory */ | |
88 | #define _ADDR_HI (ioaddr+15) /* Control registers for said */ | |
89 | #define _ADDR_LO (ioaddr+14) | |
90 | ||
91 | #undef ASTATUS | |
92 | #undef ACOMMAND | |
93 | #undef AINTMASK | |
94 | ||
95 | #define ASTATUS() inb(_STATUS) | |
96 | #define ACOMMAND(cmd) outb((cmd),_COMMAND) | |
97 | #define AINTMASK(msk) outb((msk),_INTMASK) | |
98 | ||
99 | ||
100 | static int com90xx_skip_probe __initdata = 0; | |
101 | ||
102 | /* Module parameters */ | |
103 | ||
104 | static int io; /* use the insmod io= irq= shmem= options */ | |
105 | static int irq; | |
106 | static int shmem; | |
107 | static char device[9]; /* use eg. device=arc1 to change name */ | |
108 | ||
109 | module_param(io, int, 0); | |
110 | module_param(irq, int, 0); | |
111 | module_param(shmem, int, 0); | |
112 | module_param_string(device, device, sizeof(device), 0); | |
113 | ||
114 | static void __init com90xx_probe(void) | |
115 | { | |
116 | int count, status, ioaddr, numprint, airq, openparen = 0; | |
117 | unsigned long airqmask; | |
118 | int ports[(0x3f0 - 0x200) / 16 + 1] = | |
119 | {0}; | |
d0f6ecad AV |
120 | unsigned long *shmems; |
121 | void __iomem **iomem; | |
1da177e4 LT |
122 | int numports, numshmems, *port; |
123 | u_long *p; | |
d0f6ecad | 124 | int index; |
1da177e4 LT |
125 | |
126 | if (!io && !irq && !shmem && !*device && com90xx_skip_probe) | |
127 | return; | |
128 | ||
15901dc9 | 129 | shmems = kzalloc(((0x100000-0xa0000) / 0x800) * sizeof(unsigned long), |
d0f6ecad AV |
130 | GFP_KERNEL); |
131 | if (!shmems) | |
132 | return; | |
15901dc9 | 133 | iomem = kzalloc(((0x100000-0xa0000) / 0x800) * sizeof(void __iomem *), |
d0f6ecad AV |
134 | GFP_KERNEL); |
135 | if (!iomem) { | |
136 | kfree(shmems); | |
137 | return; | |
138 | } | |
139 | ||
1da177e4 LT |
140 | BUGLVL(D_NORMAL) printk(VERSION); |
141 | ||
142 | /* set up the arrays where we'll store the possible probe addresses */ | |
143 | numports = numshmems = 0; | |
144 | if (io) | |
145 | ports[numports++] = io; | |
146 | else | |
147 | for (count = 0x200; count <= 0x3f0; count += 16) | |
148 | ports[numports++] = count; | |
149 | if (shmem) | |
150 | shmems[numshmems++] = shmem; | |
151 | else | |
152 | for (count = 0xA0000; count <= 0xFF800; count += 2048) | |
153 | shmems[numshmems++] = count; | |
154 | ||
155 | /* Stage 1: abandon any reserved ports, or ones with status==0xFF | |
156 | * (empty), and reset any others by reading the reset port. | |
157 | */ | |
158 | numprint = -1; | |
159 | for (port = &ports[0]; port - ports < numports; port++) { | |
160 | numprint++; | |
161 | numprint %= 8; | |
162 | if (!numprint) { | |
163 | BUGMSG2(D_INIT, "\n"); | |
164 | BUGMSG2(D_INIT, "S1: "); | |
165 | } | |
166 | BUGMSG2(D_INIT, "%Xh ", *port); | |
167 | ||
168 | ioaddr = *port; | |
169 | ||
170 | if (!request_region(*port, ARCNET_TOTAL_SIZE, "arcnet (90xx)")) { | |
171 | BUGMSG2(D_INIT_REASONS, "(request_region)\n"); | |
172 | BUGMSG2(D_INIT_REASONS, "S1: "); | |
173 | BUGLVL(D_INIT_REASONS) numprint = 0; | |
174 | *port-- = ports[--numports]; | |
175 | continue; | |
176 | } | |
177 | if (ASTATUS() == 0xFF) { | |
178 | BUGMSG2(D_INIT_REASONS, "(empty)\n"); | |
179 | BUGMSG2(D_INIT_REASONS, "S1: "); | |
180 | BUGLVL(D_INIT_REASONS) numprint = 0; | |
181 | release_region(*port, ARCNET_TOTAL_SIZE); | |
182 | *port-- = ports[--numports]; | |
183 | continue; | |
184 | } | |
185 | inb(_RESET); /* begin resetting card */ | |
186 | ||
187 | BUGMSG2(D_INIT_REASONS, "\n"); | |
188 | BUGMSG2(D_INIT_REASONS, "S1: "); | |
189 | BUGLVL(D_INIT_REASONS) numprint = 0; | |
190 | } | |
191 | BUGMSG2(D_INIT, "\n"); | |
192 | ||
193 | if (!numports) { | |
194 | BUGMSG2(D_NORMAL, "S1: No ARCnet cards found.\n"); | |
d0f6ecad AV |
195 | kfree(shmems); |
196 | kfree(iomem); | |
1da177e4 LT |
197 | return; |
198 | } | |
199 | /* Stage 2: we have now reset any possible ARCnet cards, so we can't | |
200 | * do anything until they finish. If D_INIT, print the list of | |
201 | * cards that are left. | |
202 | */ | |
203 | numprint = -1; | |
204 | for (port = &ports[0]; port < ports + numports; port++) { | |
205 | numprint++; | |
206 | numprint %= 8; | |
207 | if (!numprint) { | |
208 | BUGMSG2(D_INIT, "\n"); | |
209 | BUGMSG2(D_INIT, "S2: "); | |
210 | } | |
211 | BUGMSG2(D_INIT, "%Xh ", *port); | |
212 | } | |
213 | BUGMSG2(D_INIT, "\n"); | |
214 | mdelay(RESETtime); | |
215 | ||
216 | /* Stage 3: abandon any shmem addresses that don't have the signature | |
217 | * 0xD1 byte in the right place, or are read-only. | |
218 | */ | |
219 | numprint = -1; | |
d0f6ecad AV |
220 | for (index = 0, p = &shmems[0]; index < numshmems; p++, index++) { |
221 | void __iomem *base; | |
1da177e4 LT |
222 | |
223 | numprint++; | |
224 | numprint %= 8; | |
225 | if (!numprint) { | |
226 | BUGMSG2(D_INIT, "\n"); | |
227 | BUGMSG2(D_INIT, "S3: "); | |
228 | } | |
229 | BUGMSG2(D_INIT, "%lXh ", *p); | |
230 | ||
d0f6ecad | 231 | if (!request_mem_region(*p, MIRROR_SIZE, "arcnet (90xx)")) { |
1da177e4 LT |
232 | BUGMSG2(D_INIT_REASONS, "(request_mem_region)\n"); |
233 | BUGMSG2(D_INIT_REASONS, "Stage 3: "); | |
234 | BUGLVL(D_INIT_REASONS) numprint = 0; | |
d0f6ecad AV |
235 | goto out; |
236 | } | |
237 | base = ioremap(*p, MIRROR_SIZE); | |
238 | if (!base) { | |
239 | BUGMSG2(D_INIT_REASONS, "(ioremap)\n"); | |
240 | BUGMSG2(D_INIT_REASONS, "Stage 3: "); | |
241 | BUGLVL(D_INIT_REASONS) numprint = 0; | |
242 | goto out1; | |
1da177e4 | 243 | } |
d0f6ecad | 244 | if (readb(base) != TESTvalue) { |
1da177e4 | 245 | BUGMSG2(D_INIT_REASONS, "(%02Xh != %02Xh)\n", |
d0f6ecad | 246 | readb(base), TESTvalue); |
1da177e4 LT |
247 | BUGMSG2(D_INIT_REASONS, "S3: "); |
248 | BUGLVL(D_INIT_REASONS) numprint = 0; | |
d0f6ecad | 249 | goto out2; |
1da177e4 LT |
250 | } |
251 | /* By writing 0x42 to the TESTvalue location, we also make | |
252 | * sure no "mirror" shmem areas show up - if they occur | |
253 | * in another pass through this loop, they will be discarded | |
254 | * because *cptr != TESTvalue. | |
255 | */ | |
d0f6ecad AV |
256 | writeb(0x42, base); |
257 | if (readb(base) != 0x42) { | |
1da177e4 LT |
258 | BUGMSG2(D_INIT_REASONS, "(read only)\n"); |
259 | BUGMSG2(D_INIT_REASONS, "S3: "); | |
d0f6ecad | 260 | goto out2; |
1da177e4 LT |
261 | } |
262 | BUGMSG2(D_INIT_REASONS, "\n"); | |
263 | BUGMSG2(D_INIT_REASONS, "S3: "); | |
264 | BUGLVL(D_INIT_REASONS) numprint = 0; | |
d0f6ecad AV |
265 | iomem[index] = base; |
266 | continue; | |
267 | out2: | |
268 | iounmap(base); | |
269 | out1: | |
270 | release_mem_region(*p, MIRROR_SIZE); | |
271 | out: | |
272 | *p-- = shmems[--numshmems]; | |
273 | index--; | |
1da177e4 LT |
274 | } |
275 | BUGMSG2(D_INIT, "\n"); | |
276 | ||
277 | if (!numshmems) { | |
278 | BUGMSG2(D_NORMAL, "S3: No ARCnet cards found.\n"); | |
279 | for (port = &ports[0]; port < ports + numports; port++) | |
280 | release_region(*port, ARCNET_TOTAL_SIZE); | |
d0f6ecad AV |
281 | kfree(shmems); |
282 | kfree(iomem); | |
1da177e4 LT |
283 | return; |
284 | } | |
285 | /* Stage 4: something of a dummy, to report the shmems that are | |
286 | * still possible after stage 3. | |
287 | */ | |
288 | numprint = -1; | |
289 | for (p = &shmems[0]; p < shmems + numshmems; p++) { | |
290 | numprint++; | |
291 | numprint %= 8; | |
292 | if (!numprint) { | |
293 | BUGMSG2(D_INIT, "\n"); | |
294 | BUGMSG2(D_INIT, "S4: "); | |
295 | } | |
296 | BUGMSG2(D_INIT, "%lXh ", *p); | |
297 | } | |
298 | BUGMSG2(D_INIT, "\n"); | |
299 | ||
300 | /* Stage 5: for any ports that have the correct status, can disable | |
301 | * the RESET flag, and (if no irq is given) generate an autoirq, | |
302 | * register an ARCnet device. | |
303 | * | |
304 | * Currently, we can only register one device per probe, so quit | |
305 | * after the first one is found. | |
306 | */ | |
307 | numprint = -1; | |
308 | for (port = &ports[0]; port < ports + numports; port++) { | |
309 | int found = 0; | |
310 | numprint++; | |
311 | numprint %= 8; | |
312 | if (!numprint) { | |
313 | BUGMSG2(D_INIT, "\n"); | |
314 | BUGMSG2(D_INIT, "S5: "); | |
315 | } | |
316 | BUGMSG2(D_INIT, "%Xh ", *port); | |
317 | ||
318 | ioaddr = *port; | |
319 | status = ASTATUS(); | |
320 | ||
321 | if ((status & 0x9D) | |
322 | != (NORXflag | RECONflag | TXFREEflag | RESETflag)) { | |
323 | BUGMSG2(D_INIT_REASONS, "(status=%Xh)\n", status); | |
324 | BUGMSG2(D_INIT_REASONS, "S5: "); | |
325 | BUGLVL(D_INIT_REASONS) numprint = 0; | |
326 | release_region(*port, ARCNET_TOTAL_SIZE); | |
327 | *port-- = ports[--numports]; | |
328 | continue; | |
329 | } | |
330 | ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear); | |
331 | status = ASTATUS(); | |
332 | if (status & RESETflag) { | |
333 | BUGMSG2(D_INIT_REASONS, " (eternal reset, status=%Xh)\n", | |
334 | status); | |
335 | BUGMSG2(D_INIT_REASONS, "S5: "); | |
336 | BUGLVL(D_INIT_REASONS) numprint = 0; | |
337 | release_region(*port, ARCNET_TOTAL_SIZE); | |
338 | *port-- = ports[--numports]; | |
339 | continue; | |
340 | } | |
341 | /* skip this completely if an IRQ was given, because maybe | |
342 | * we're on a machine that locks during autoirq! | |
343 | */ | |
344 | if (!irq) { | |
345 | /* if we do this, we're sure to get an IRQ since the | |
346 | * card has just reset and the NORXflag is on until | |
347 | * we tell it to start receiving. | |
348 | */ | |
349 | airqmask = probe_irq_on(); | |
350 | AINTMASK(NORXflag); | |
351 | udelay(1); | |
352 | AINTMASK(0); | |
353 | airq = probe_irq_off(airqmask); | |
354 | ||
355 | if (airq <= 0) { | |
356 | BUGMSG2(D_INIT_REASONS, "(airq=%d)\n", airq); | |
357 | BUGMSG2(D_INIT_REASONS, "S5: "); | |
358 | BUGLVL(D_INIT_REASONS) numprint = 0; | |
359 | release_region(*port, ARCNET_TOTAL_SIZE); | |
360 | *port-- = ports[--numports]; | |
361 | continue; | |
362 | } | |
363 | } else { | |
364 | airq = irq; | |
365 | } | |
366 | ||
367 | BUGMSG2(D_INIT, "(%d,", airq); | |
368 | openparen = 1; | |
369 | ||
370 | /* Everything seems okay. But which shmem, if any, puts | |
371 | * back its signature byte when the card is reset? | |
372 | * | |
373 | * If there are multiple cards installed, there might be | |
374 | * multiple shmems still in the list. | |
375 | */ | |
376 | #ifdef FAST_PROBE | |
377 | if (numports > 1 || numshmems > 1) { | |
378 | inb(_RESET); | |
379 | mdelay(RESETtime); | |
380 | } else { | |
381 | /* just one shmem and port, assume they match */ | |
d0f6ecad | 382 | writeb(TESTvalue, iomem[0]); |
1da177e4 LT |
383 | } |
384 | #else | |
385 | inb(_RESET); | |
386 | mdelay(RESETtime); | |
387 | #endif | |
388 | ||
d0f6ecad AV |
389 | for (index = 0; index < numshmems; index++) { |
390 | u_long ptr = shmems[index]; | |
391 | void __iomem *base = iomem[index]; | |
1da177e4 | 392 | |
d0f6ecad | 393 | if (readb(base) == TESTvalue) { /* found one */ |
1da177e4 LT |
394 | BUGMSG2(D_INIT, "%lXh)\n", *p); |
395 | openparen = 0; | |
396 | ||
397 | /* register the card */ | |
d0f6ecad | 398 | if (com90xx_found(*port, airq, ptr, base) == 0) |
1da177e4 LT |
399 | found = 1; |
400 | numprint = -1; | |
401 | ||
402 | /* remove shmem from the list */ | |
d0f6ecad AV |
403 | shmems[index] = shmems[--numshmems]; |
404 | iomem[index] = iomem[numshmems]; | |
1da177e4 LT |
405 | break; /* go to the next I/O port */ |
406 | } else { | |
d0f6ecad | 407 | BUGMSG2(D_INIT_REASONS, "%Xh-", readb(base)); |
1da177e4 LT |
408 | } |
409 | } | |
410 | ||
411 | if (openparen) { | |
412 | BUGLVL(D_INIT) printk("no matching shmem)\n"); | |
413 | BUGLVL(D_INIT_REASONS) printk("S5: "); | |
414 | BUGLVL(D_INIT_REASONS) numprint = 0; | |
415 | } | |
416 | if (!found) | |
417 | release_region(*port, ARCNET_TOTAL_SIZE); | |
418 | *port-- = ports[--numports]; | |
419 | } | |
420 | ||
421 | BUGLVL(D_INIT_REASONS) printk("\n"); | |
422 | ||
423 | /* Now put back TESTvalue on all leftover shmems. */ | |
d0f6ecad AV |
424 | for (index = 0; index < numshmems; index++) { |
425 | writeb(TESTvalue, iomem[index]); | |
426 | iounmap(iomem[index]); | |
427 | release_mem_region(shmems[index], MIRROR_SIZE); | |
1da177e4 | 428 | } |
d0f6ecad AV |
429 | kfree(shmems); |
430 | kfree(iomem); | |
1da177e4 LT |
431 | } |
432 | ||
d0f6ecad AV |
433 | static int check_mirror(unsigned long addr, size_t size) |
434 | { | |
435 | void __iomem *p; | |
436 | int res = -1; | |
437 | ||
438 | if (!request_mem_region(addr, size, "arcnet (90xx)")) | |
439 | return -1; | |
440 | ||
441 | p = ioremap(addr, size); | |
442 | if (p) { | |
443 | if (readb(p) == TESTvalue) | |
444 | res = 1; | |
445 | else | |
446 | res = 0; | |
447 | iounmap(p); | |
448 | } | |
449 | ||
450 | release_mem_region(addr, size); | |
451 | return res; | |
452 | } | |
1da177e4 LT |
453 | |
454 | /* Set up the struct net_device associated with this card. Called after | |
455 | * probing succeeds. | |
456 | */ | |
d0f6ecad | 457 | static int __init com90xx_found(int ioaddr, int airq, u_long shmem, void __iomem *p) |
1da177e4 LT |
458 | { |
459 | struct net_device *dev = NULL; | |
460 | struct arcnet_local *lp; | |
461 | u_long first_mirror, last_mirror; | |
462 | int mirror_size; | |
463 | ||
464 | /* allocate struct net_device */ | |
465 | dev = alloc_arcdev(device); | |
466 | if (!dev) { | |
467 | BUGMSG2(D_NORMAL, "com90xx: Can't allocate device!\n"); | |
d0f6ecad AV |
468 | iounmap(p); |
469 | release_mem_region(shmem, MIRROR_SIZE); | |
1da177e4 LT |
470 | return -ENOMEM; |
471 | } | |
454d7c9b | 472 | lp = netdev_priv(dev); |
1da177e4 LT |
473 | /* find the real shared memory start/end points, including mirrors */ |
474 | ||
475 | /* guess the actual size of one "memory mirror" - the number of | |
476 | * bytes between copies of the shared memory. On most cards, it's | |
477 | * 2k (or there are no mirrors at all) but on some, it's 4k. | |
478 | */ | |
479 | mirror_size = MIRROR_SIZE; | |
d0f6ecad AV |
480 | if (readb(p) == TESTvalue && |
481 | check_mirror(shmem - MIRROR_SIZE, MIRROR_SIZE) == 0 && | |
482 | check_mirror(shmem - 2 * MIRROR_SIZE, MIRROR_SIZE) == 1) | |
483 | mirror_size = 2 * MIRROR_SIZE; | |
1da177e4 | 484 | |
d0f6ecad AV |
485 | first_mirror = shmem - mirror_size; |
486 | while (check_mirror(first_mirror, mirror_size) == 1) | |
1da177e4 LT |
487 | first_mirror -= mirror_size; |
488 | first_mirror += mirror_size; | |
489 | ||
d0f6ecad AV |
490 | last_mirror = shmem + mirror_size; |
491 | while (check_mirror(last_mirror, mirror_size) == 1) | |
1da177e4 LT |
492 | last_mirror += mirror_size; |
493 | last_mirror -= mirror_size; | |
494 | ||
495 | dev->mem_start = first_mirror; | |
496 | dev->mem_end = last_mirror + MIRROR_SIZE - 1; | |
497 | ||
d0f6ecad AV |
498 | iounmap(p); |
499 | release_mem_region(shmem, MIRROR_SIZE); | |
500 | ||
1da177e4 LT |
501 | if (!request_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1, "arcnet (90xx)")) |
502 | goto err_free_dev; | |
503 | ||
504 | /* reserve the irq */ | |
a0607fd3 | 505 | if (request_irq(airq, arcnet_interrupt, 0, "arcnet (90xx)", dev)) { |
1da177e4 LT |
506 | BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", airq); |
507 | goto err_release_mem; | |
508 | } | |
509 | dev->irq = airq; | |
510 | ||
511 | /* Initialize the rest of the device structure. */ | |
512 | lp->card_name = "COM90xx"; | |
513 | lp->hw.command = com90xx_command; | |
514 | lp->hw.status = com90xx_status; | |
515 | lp->hw.intmask = com90xx_setmask; | |
516 | lp->hw.reset = com90xx_reset; | |
517 | lp->hw.owner = THIS_MODULE; | |
518 | lp->hw.copy_to_card = com90xx_copy_to_card; | |
519 | lp->hw.copy_from_card = com90xx_copy_from_card; | |
520 | lp->mem_start = ioremap(dev->mem_start, dev->mem_end - dev->mem_start + 1); | |
521 | if (!lp->mem_start) { | |
522 | BUGMSG(D_NORMAL, "Can't remap device memory!\n"); | |
523 | goto err_free_irq; | |
524 | } | |
525 | ||
526 | /* get and check the station ID from offset 1 in shmem */ | |
527 | dev->dev_addr[0] = readb(lp->mem_start + 1); | |
528 | ||
529 | dev->base_addr = ioaddr; | |
530 | ||
531 | BUGMSG(D_NORMAL, "COM90xx station %02Xh found at %03lXh, IRQ %d, " | |
532 | "ShMem %lXh (%ld*%xh).\n", | |
533 | dev->dev_addr[0], | |
534 | dev->base_addr, dev->irq, dev->mem_start, | |
535 | (dev->mem_end - dev->mem_start + 1) / mirror_size, mirror_size); | |
536 | ||
537 | if (register_netdev(dev)) | |
538 | goto err_unmap; | |
539 | ||
540 | cards[numcards++] = dev; | |
541 | return 0; | |
542 | ||
543 | err_unmap: | |
544 | iounmap(lp->mem_start); | |
545 | err_free_irq: | |
546 | free_irq(dev->irq, dev); | |
547 | err_release_mem: | |
548 | release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1); | |
549 | err_free_dev: | |
550 | free_netdev(dev); | |
551 | return -EIO; | |
552 | } | |
553 | ||
554 | ||
555 | static void com90xx_command(struct net_device *dev, int cmd) | |
556 | { | |
557 | short ioaddr = dev->base_addr; | |
558 | ||
559 | ACOMMAND(cmd); | |
560 | } | |
561 | ||
562 | ||
563 | static int com90xx_status(struct net_device *dev) | |
564 | { | |
565 | short ioaddr = dev->base_addr; | |
566 | ||
567 | return ASTATUS(); | |
568 | } | |
569 | ||
570 | ||
571 | static void com90xx_setmask(struct net_device *dev, int mask) | |
572 | { | |
573 | short ioaddr = dev->base_addr; | |
574 | ||
575 | AINTMASK(mask); | |
576 | } | |
577 | ||
578 | ||
579 | /* | |
580 | * Do a hardware reset on the card, and set up necessary registers. | |
581 | * | |
582 | * This should be called as little as possible, because it disrupts the | |
583 | * token on the network (causes a RECON) and requires a significant delay. | |
584 | * | |
585 | * However, it does make sure the card is in a defined state. | |
586 | */ | |
888432f6 | 587 | static int com90xx_reset(struct net_device *dev, int really_reset) |
1da177e4 | 588 | { |
454d7c9b | 589 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
590 | short ioaddr = dev->base_addr; |
591 | ||
592 | BUGMSG(D_INIT, "Resetting (status=%02Xh)\n", ASTATUS()); | |
593 | ||
594 | if (really_reset) { | |
595 | /* reset the card */ | |
596 | inb(_RESET); | |
597 | mdelay(RESETtime); | |
598 | } | |
599 | ACOMMAND(CFLAGScmd | RESETclear); /* clear flags & end reset */ | |
600 | ACOMMAND(CFLAGScmd | CONFIGclear); | |
601 | ||
602 | /* don't do this until we verify that it doesn't hurt older cards! */ | |
603 | /* outb(inb(_CONFIG) | ENABLE16flag, _CONFIG); */ | |
604 | ||
605 | /* verify that the ARCnet signature byte is present */ | |
606 | if (readb(lp->mem_start) != TESTvalue) { | |
607 | if (really_reset) | |
608 | BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n"); | |
609 | return 1; | |
610 | } | |
611 | /* enable extended (512-byte) packets */ | |
612 | ACOMMAND(CONFIGcmd | EXTconf); | |
613 | ||
614 | /* clean out all the memory to make debugging make more sense :) */ | |
615 | BUGLVL(D_DURING) | |
616 | memset_io(lp->mem_start, 0x42, 2048); | |
617 | ||
618 | /* done! return success. */ | |
619 | return 0; | |
620 | } | |
621 | ||
622 | static void com90xx_copy_to_card(struct net_device *dev, int bufnum, int offset, | |
623 | void *buf, int count) | |
624 | { | |
454d7c9b | 625 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
626 | void __iomem *memaddr = lp->mem_start + bufnum * 512 + offset; |
627 | TIME("memcpy_toio", count, memcpy_toio(memaddr, buf, count)); | |
628 | } | |
629 | ||
630 | ||
631 | static void com90xx_copy_from_card(struct net_device *dev, int bufnum, int offset, | |
632 | void *buf, int count) | |
633 | { | |
454d7c9b | 634 | struct arcnet_local *lp = netdev_priv(dev); |
1da177e4 LT |
635 | void __iomem *memaddr = lp->mem_start + bufnum * 512 + offset; |
636 | TIME("memcpy_fromio", count, memcpy_fromio(buf, memaddr, count)); | |
637 | } | |
638 | ||
639 | ||
640 | MODULE_LICENSE("GPL"); | |
641 | ||
642 | static int __init com90xx_init(void) | |
643 | { | |
644 | if (irq == 2) | |
645 | irq = 9; | |
646 | com90xx_probe(); | |
647 | if (!numcards) | |
648 | return -EIO; | |
649 | return 0; | |
650 | } | |
651 | ||
652 | static void __exit com90xx_exit(void) | |
653 | { | |
654 | struct net_device *dev; | |
655 | struct arcnet_local *lp; | |
656 | int count; | |
657 | ||
658 | for (count = 0; count < numcards; count++) { | |
659 | dev = cards[count]; | |
454d7c9b | 660 | lp = netdev_priv(dev); |
1da177e4 LT |
661 | |
662 | unregister_netdev(dev); | |
663 | free_irq(dev->irq, dev); | |
664 | iounmap(lp->mem_start); | |
665 | release_region(dev->base_addr, ARCNET_TOTAL_SIZE); | |
666 | release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1); | |
667 | free_netdev(dev); | |
668 | } | |
669 | } | |
670 | ||
671 | module_init(com90xx_init); | |
672 | module_exit(com90xx_exit); | |
673 | ||
674 | #ifndef MODULE | |
675 | static int __init com90xx_setup(char *s) | |
676 | { | |
677 | int ints[8]; | |
678 | ||
679 | s = get_options(s, 8, ints); | |
680 | if (!ints[0] && !*s) { | |
681 | printk("com90xx: Disabled.\n"); | |
682 | return 1; | |
683 | } | |
684 | ||
685 | switch (ints[0]) { | |
686 | default: /* ERROR */ | |
687 | printk("com90xx: Too many arguments.\n"); | |
688 | case 3: /* Mem address */ | |
689 | shmem = ints[3]; | |
690 | case 2: /* IRQ */ | |
691 | irq = ints[2]; | |
692 | case 1: /* IO address */ | |
693 | io = ints[1]; | |
694 | } | |
695 | ||
696 | if (*s) | |
697 | snprintf(device, sizeof(device), "%s", s); | |
698 | ||
699 | return 1; | |
700 | } | |
701 | ||
702 | __setup("com90xx=", com90xx_setup); | |
703 | #endif |