Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * ISA Plug & Play support | |
3 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz> | |
4 | * | |
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 as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | * | |
20 | * Changelog: | |
21 | * 2000-01-01 Added quirks handling for buggy hardware | |
22 | * Peter Denison <peterd@pnd-pc.demon.co.uk> | |
23 | * 2000-06-14 Added isapnp_probe_devs() and isapnp_activate_dev() | |
24 | * Christoph Hellwig <hch@infradead.org> | |
25 | * 2001-06-03 Added release_region calls to correspond with | |
26 | * request_region calls when a failure occurs. Also | |
27 | * added KERN_* constants to printk() calls. | |
28 | * 2001-11-07 Added isapnp_{,un}register_driver calls along the lines | |
29 | * of the pci driver interface | |
30 | * Kai Germaschewski <kai.germaschewski@gmx.de> | |
31 | * 2002-06-06 Made the use of dma channel 0 configurable | |
32 | * Gerald Teschl <gerald.teschl@univie.ac.at> | |
33 | * 2002-10-06 Ported to PnP Layer - Adam Belay <ambx1@neo.rr.com> | |
34 | * 2003-08-11 Resource Management Updates - Adam Belay <ambx1@neo.rr.com> | |
35 | */ | |
36 | ||
1da177e4 LT |
37 | #include <linux/module.h> |
38 | #include <linux/kernel.h> | |
39 | #include <linux/errno.h> | |
40 | #include <linux/slab.h> | |
41 | #include <linux/delay.h> | |
42 | #include <linux/init.h> | |
43 | #include <linux/isapnp.h> | |
14cc3e2b | 44 | #include <linux/mutex.h> |
1da177e4 LT |
45 | #include <asm/io.h> |
46 | ||
47 | #if 0 | |
48 | #define ISAPNP_REGION_OK | |
49 | #endif | |
50 | #if 0 | |
51 | #define ISAPNP_DEBUG | |
52 | #endif | |
53 | ||
9dd78466 BH |
54 | int isapnp_disable; /* Disable ISA PnP */ |
55 | static int isapnp_rdp; /* Read Data Port */ | |
56 | static int isapnp_reset = 1; /* reset all PnP cards (deactivate) */ | |
57 | static int isapnp_verbose = 1; /* verbose mode */ | |
1da177e4 LT |
58 | |
59 | MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); | |
60 | MODULE_DESCRIPTION("Generic ISA Plug & Play support"); | |
61 | module_param(isapnp_disable, int, 0); | |
62 | MODULE_PARM_DESC(isapnp_disable, "ISA Plug & Play disable"); | |
63 | module_param(isapnp_rdp, int, 0); | |
64 | MODULE_PARM_DESC(isapnp_rdp, "ISA Plug & Play read data port"); | |
65 | module_param(isapnp_reset, int, 0); | |
66 | MODULE_PARM_DESC(isapnp_reset, "ISA Plug & Play reset all cards"); | |
67 | module_param(isapnp_verbose, int, 0); | |
68 | MODULE_PARM_DESC(isapnp_verbose, "ISA Plug & Play verbose mode"); | |
69 | MODULE_LICENSE("GPL"); | |
70 | ||
71 | #define _PIDXR 0x279 | |
72 | #define _PNPWRP 0xa79 | |
73 | ||
74 | /* short tags */ | |
75 | #define _STAG_PNPVERNO 0x01 | |
76 | #define _STAG_LOGDEVID 0x02 | |
77 | #define _STAG_COMPATDEVID 0x03 | |
78 | #define _STAG_IRQ 0x04 | |
79 | #define _STAG_DMA 0x05 | |
80 | #define _STAG_STARTDEP 0x06 | |
81 | #define _STAG_ENDDEP 0x07 | |
82 | #define _STAG_IOPORT 0x08 | |
83 | #define _STAG_FIXEDIO 0x09 | |
84 | #define _STAG_VENDOR 0x0e | |
85 | #define _STAG_END 0x0f | |
86 | /* long tags */ | |
87 | #define _LTAG_MEMRANGE 0x81 | |
88 | #define _LTAG_ANSISTR 0x82 | |
89 | #define _LTAG_UNICODESTR 0x83 | |
90 | #define _LTAG_VENDOR 0x84 | |
91 | #define _LTAG_MEM32RANGE 0x85 | |
92 | #define _LTAG_FIXEDMEM32RANGE 0x86 | |
93 | ||
94 | static unsigned char isapnp_checksum_value; | |
14cc3e2b | 95 | static DEFINE_MUTEX(isapnp_cfg_mutex); |
1da177e4 LT |
96 | static int isapnp_detected; |
97 | static int isapnp_csn_count; | |
98 | ||
99 | /* some prototypes */ | |
100 | ||
101 | static inline void write_data(unsigned char x) | |
102 | { | |
103 | outb(x, _PNPWRP); | |
104 | } | |
105 | ||
106 | static inline void write_address(unsigned char x) | |
107 | { | |
108 | outb(x, _PIDXR); | |
109 | udelay(20); | |
110 | } | |
111 | ||
112 | static inline unsigned char read_data(void) | |
113 | { | |
114 | unsigned char val = inb(isapnp_rdp); | |
115 | return val; | |
116 | } | |
117 | ||
118 | unsigned char isapnp_read_byte(unsigned char idx) | |
119 | { | |
120 | write_address(idx); | |
121 | return read_data(); | |
122 | } | |
123 | ||
124 | static unsigned short isapnp_read_word(unsigned char idx) | |
125 | { | |
126 | unsigned short val; | |
127 | ||
128 | val = isapnp_read_byte(idx); | |
9dd78466 | 129 | val = (val << 8) + isapnp_read_byte(idx + 1); |
1da177e4 LT |
130 | return val; |
131 | } | |
132 | ||
133 | void isapnp_write_byte(unsigned char idx, unsigned char val) | |
134 | { | |
135 | write_address(idx); | |
136 | write_data(val); | |
137 | } | |
138 | ||
139 | static void isapnp_write_word(unsigned char idx, unsigned short val) | |
140 | { | |
141 | isapnp_write_byte(idx, val >> 8); | |
9dd78466 | 142 | isapnp_write_byte(idx + 1, val); |
1da177e4 LT |
143 | } |
144 | ||
1da177e4 LT |
145 | static void isapnp_key(void) |
146 | { | |
147 | unsigned char code = 0x6a, msb; | |
148 | int i; | |
149 | ||
150 | mdelay(1); | |
151 | write_address(0x00); | |
152 | write_address(0x00); | |
153 | ||
154 | write_address(code); | |
155 | ||
156 | for (i = 1; i < 32; i++) { | |
157 | msb = ((code & 0x01) ^ ((code & 0x02) >> 1)) << 7; | |
158 | code = (code >> 1) | msb; | |
159 | write_address(code); | |
160 | } | |
161 | } | |
162 | ||
163 | /* place all pnp cards in wait-for-key state */ | |
164 | static void isapnp_wait(void) | |
165 | { | |
166 | isapnp_write_byte(0x02, 0x02); | |
167 | } | |
168 | ||
169 | static void isapnp_wake(unsigned char csn) | |
170 | { | |
171 | isapnp_write_byte(0x03, csn); | |
172 | } | |
173 | ||
174 | static void isapnp_device(unsigned char logdev) | |
175 | { | |
176 | isapnp_write_byte(0x07, logdev); | |
177 | } | |
178 | ||
179 | static void isapnp_activate(unsigned char logdev) | |
180 | { | |
181 | isapnp_device(logdev); | |
182 | isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 1); | |
183 | udelay(250); | |
184 | } | |
185 | ||
186 | static void isapnp_deactivate(unsigned char logdev) | |
187 | { | |
188 | isapnp_device(logdev); | |
189 | isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 0); | |
190 | udelay(500); | |
191 | } | |
192 | ||
193 | static void __init isapnp_peek(unsigned char *data, int bytes) | |
194 | { | |
195 | int i, j; | |
9dd78466 | 196 | unsigned char d = 0; |
1da177e4 LT |
197 | |
198 | for (i = 1; i <= bytes; i++) { | |
199 | for (j = 0; j < 20; j++) { | |
200 | d = isapnp_read_byte(0x05); | |
201 | if (d & 1) | |
202 | break; | |
203 | udelay(100); | |
204 | } | |
205 | if (!(d & 1)) { | |
206 | if (data != NULL) | |
207 | *data++ = 0xff; | |
208 | continue; | |
209 | } | |
210 | d = isapnp_read_byte(0x04); /* PRESDI */ | |
211 | isapnp_checksum_value += d; | |
212 | if (data != NULL) | |
213 | *data++ = d; | |
214 | } | |
215 | } | |
216 | ||
217 | #define RDP_STEP 32 /* minimum is 4 */ | |
218 | ||
219 | static int isapnp_next_rdp(void) | |
220 | { | |
221 | int rdp = isapnp_rdp; | |
222 | static int old_rdp = 0; | |
9dd78466 BH |
223 | |
224 | if (old_rdp) { | |
1da177e4 LT |
225 | release_region(old_rdp, 1); |
226 | old_rdp = 0; | |
227 | } | |
228 | while (rdp <= 0x3ff) { | |
229 | /* | |
9dd78466 BH |
230 | * We cannot use NE2000 probe spaces for ISAPnP or we |
231 | * will lock up machines. | |
1da177e4 | 232 | */ |
9dd78466 BH |
233 | if ((rdp < 0x280 || rdp > 0x380) |
234 | && request_region(rdp, 1, "ISAPnP")) { | |
1da177e4 LT |
235 | isapnp_rdp = rdp; |
236 | old_rdp = rdp; | |
237 | return 0; | |
238 | } | |
239 | rdp += RDP_STEP; | |
240 | } | |
241 | return -1; | |
242 | } | |
243 | ||
244 | /* Set read port address */ | |
245 | static inline void isapnp_set_rdp(void) | |
246 | { | |
247 | isapnp_write_byte(0x00, isapnp_rdp >> 2); | |
248 | udelay(100); | |
249 | } | |
250 | ||
251 | /* | |
252 | * Perform an isolation. The port selection code now tries to avoid | |
253 | * "dangerous to read" ports. | |
254 | */ | |
1da177e4 LT |
255 | static int __init isapnp_isolate_rdp_select(void) |
256 | { | |
257 | isapnp_wait(); | |
258 | isapnp_key(); | |
259 | ||
260 | /* Control: reset CSN and conditionally everything else too */ | |
261 | isapnp_write_byte(0x02, isapnp_reset ? 0x05 : 0x04); | |
262 | mdelay(2); | |
263 | ||
264 | isapnp_wait(); | |
265 | isapnp_key(); | |
266 | isapnp_wake(0x00); | |
267 | ||
268 | if (isapnp_next_rdp() < 0) { | |
269 | isapnp_wait(); | |
270 | return -1; | |
271 | } | |
272 | ||
273 | isapnp_set_rdp(); | |
274 | udelay(1000); | |
275 | write_address(0x01); | |
276 | udelay(1000); | |
277 | return 0; | |
278 | } | |
279 | ||
280 | /* | |
281 | * Isolate (assign uniqued CSN) to all ISA PnP devices. | |
282 | */ | |
1da177e4 LT |
283 | static int __init isapnp_isolate(void) |
284 | { | |
285 | unsigned char checksum = 0x6a; | |
286 | unsigned char chksum = 0x00; | |
287 | unsigned char bit = 0x00; | |
288 | int data; | |
289 | int csn = 0; | |
290 | int i; | |
291 | int iteration = 1; | |
292 | ||
293 | isapnp_rdp = 0x213; | |
294 | if (isapnp_isolate_rdp_select() < 0) | |
295 | return -1; | |
296 | ||
297 | while (1) { | |
298 | for (i = 1; i <= 64; i++) { | |
299 | data = read_data() << 8; | |
300 | udelay(250); | |
301 | data = data | read_data(); | |
302 | udelay(250); | |
303 | if (data == 0x55aa) | |
304 | bit = 0x01; | |
9dd78466 BH |
305 | checksum = |
306 | ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) | |
307 | | (checksum >> 1); | |
1da177e4 LT |
308 | bit = 0x00; |
309 | } | |
310 | for (i = 65; i <= 72; i++) { | |
311 | data = read_data() << 8; | |
312 | udelay(250); | |
313 | data = data | read_data(); | |
314 | udelay(250); | |
315 | if (data == 0x55aa) | |
316 | chksum |= (1 << (i - 65)); | |
317 | } | |
318 | if (checksum != 0x00 && checksum == chksum) { | |
319 | csn++; | |
320 | ||
321 | isapnp_write_byte(0x06, csn); | |
322 | udelay(250); | |
323 | iteration++; | |
324 | isapnp_wake(0x00); | |
325 | isapnp_set_rdp(); | |
326 | udelay(1000); | |
327 | write_address(0x01); | |
328 | udelay(1000); | |
329 | goto __next; | |
330 | } | |
331 | if (iteration == 1) { | |
332 | isapnp_rdp += RDP_STEP; | |
333 | if (isapnp_isolate_rdp_select() < 0) | |
334 | return -1; | |
335 | } else if (iteration > 1) { | |
336 | break; | |
337 | } | |
338 | __next: | |
339 | if (csn == 255) | |
340 | break; | |
341 | checksum = 0x6a; | |
342 | chksum = 0x00; | |
343 | bit = 0x00; | |
344 | } | |
345 | isapnp_wait(); | |
346 | isapnp_csn_count = csn; | |
347 | return csn; | |
348 | } | |
349 | ||
350 | /* | |
351 | * Read one tag from stream. | |
352 | */ | |
1da177e4 LT |
353 | static int __init isapnp_read_tag(unsigned char *type, unsigned short *size) |
354 | { | |
355 | unsigned char tag, tmp[2]; | |
356 | ||
357 | isapnp_peek(&tag, 1); | |
9dd78466 | 358 | if (tag == 0) /* invalid tag */ |
1da177e4 LT |
359 | return -1; |
360 | if (tag & 0x80) { /* large item */ | |
361 | *type = tag; | |
362 | isapnp_peek(tmp, 2); | |
363 | *size = (tmp[1] << 8) | tmp[0]; | |
364 | } else { | |
365 | *type = (tag >> 3) & 0x0f; | |
366 | *size = tag & 0x07; | |
367 | } | |
368 | #if 0 | |
9dd78466 BH |
369 | printk(KERN_DEBUG "tag = 0x%x, type = 0x%x, size = %i\n", tag, *type, |
370 | *size); | |
1da177e4 | 371 | #endif |
1da177e4 LT |
372 | if (*type == 0xff && *size == 0xffff) /* probably invalid data */ |
373 | return -1; | |
374 | return 0; | |
375 | } | |
376 | ||
377 | /* | |
378 | * Skip specified number of bytes from stream. | |
379 | */ | |
1da177e4 LT |
380 | static void __init isapnp_skip_bytes(int count) |
381 | { | |
382 | isapnp_peek(NULL, count); | |
383 | } | |
384 | ||
385 | /* | |
386 | * Parse EISA id. | |
387 | */ | |
9dd78466 BH |
388 | static void isapnp_parse_id(struct pnp_dev *dev, unsigned short vendor, |
389 | unsigned short device) | |
1da177e4 | 390 | { |
9dd78466 | 391 | struct pnp_id *id; |
07d4e9af | 392 | |
1da177e4 LT |
393 | if (!dev) |
394 | return; | |
cd861280 | 395 | id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL); |
1da177e4 LT |
396 | if (!id) |
397 | return; | |
398 | sprintf(id->id, "%c%c%c%x%x%x%x", | |
9dd78466 BH |
399 | 'A' + ((vendor >> 2) & 0x3f) - 1, |
400 | 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1, | |
401 | 'A' + ((vendor >> 8) & 0x1f) - 1, | |
402 | (device >> 4) & 0x0f, | |
403 | device & 0x0f, (device >> 12) & 0x0f, (device >> 8) & 0x0f); | |
1da177e4 LT |
404 | pnp_add_id(id, dev); |
405 | } | |
406 | ||
407 | /* | |
408 | * Parse logical device tag. | |
409 | */ | |
9dd78466 BH |
410 | static struct pnp_dev *__init isapnp_parse_device(struct pnp_card *card, |
411 | int size, int number) | |
1da177e4 LT |
412 | { |
413 | unsigned char tmp[6]; | |
414 | struct pnp_dev *dev; | |
415 | ||
416 | isapnp_peek(tmp, size); | |
cd861280 | 417 | dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL); |
1da177e4 LT |
418 | if (!dev) |
419 | return NULL; | |
420 | dev->number = number; | |
421 | isapnp_parse_id(dev, (tmp[1] << 8) | tmp[0], (tmp[3] << 8) | tmp[2]); | |
422 | dev->regs = tmp[4]; | |
423 | dev->card = card; | |
424 | if (size > 5) | |
425 | dev->regs |= tmp[5] << 8; | |
426 | dev->protocol = &isapnp_protocol; | |
427 | dev->capabilities |= PNP_CONFIGURABLE; | |
428 | dev->capabilities |= PNP_READ; | |
429 | dev->capabilities |= PNP_WRITE; | |
430 | dev->capabilities |= PNP_DISABLE; | |
431 | pnp_init_resource_table(&dev->res); | |
432 | return dev; | |
433 | } | |
434 | ||
1da177e4 LT |
435 | /* |
436 | * Add IRQ resource to resources list. | |
437 | */ | |
1da177e4 | 438 | static void __init isapnp_parse_irq_resource(struct pnp_option *option, |
9dd78466 | 439 | int size) |
1da177e4 LT |
440 | { |
441 | unsigned char tmp[3]; | |
442 | struct pnp_irq *irq; | |
443 | unsigned long bits; | |
444 | ||
445 | isapnp_peek(tmp, size); | |
cd861280 | 446 | irq = kzalloc(sizeof(struct pnp_irq), GFP_KERNEL); |
1da177e4 LT |
447 | if (!irq) |
448 | return; | |
449 | bits = (tmp[1] << 8) | tmp[0]; | |
450 | bitmap_copy(irq->map, &bits, 16); | |
451 | if (size > 2) | |
452 | irq->flags = tmp[2]; | |
453 | else | |
454 | irq->flags = IORESOURCE_IRQ_HIGHEDGE; | |
455 | pnp_register_irq_resource(option, irq); | |
1da177e4 LT |
456 | } |
457 | ||
458 | /* | |
459 | * Add DMA resource to resources list. | |
460 | */ | |
1da177e4 | 461 | static void __init isapnp_parse_dma_resource(struct pnp_option *option, |
9dd78466 | 462 | int size) |
1da177e4 LT |
463 | { |
464 | unsigned char tmp[2]; | |
465 | struct pnp_dma *dma; | |
466 | ||
467 | isapnp_peek(tmp, size); | |
cd861280 | 468 | dma = kzalloc(sizeof(struct pnp_dma), GFP_KERNEL); |
1da177e4 LT |
469 | if (!dma) |
470 | return; | |
471 | dma->map = tmp[0]; | |
472 | dma->flags = tmp[1]; | |
473 | pnp_register_dma_resource(option, dma); | |
1da177e4 LT |
474 | } |
475 | ||
476 | /* | |
477 | * Add port resource to resources list. | |
478 | */ | |
1da177e4 | 479 | static void __init isapnp_parse_port_resource(struct pnp_option *option, |
9dd78466 | 480 | int size) |
1da177e4 LT |
481 | { |
482 | unsigned char tmp[7]; | |
483 | struct pnp_port *port; | |
484 | ||
485 | isapnp_peek(tmp, size); | |
cd861280 | 486 | port = kzalloc(sizeof(struct pnp_port), GFP_KERNEL); |
1da177e4 LT |
487 | if (!port) |
488 | return; | |
489 | port->min = (tmp[2] << 8) | tmp[1]; | |
490 | port->max = (tmp[4] << 8) | tmp[3]; | |
491 | port->align = tmp[5]; | |
492 | port->size = tmp[6]; | |
493 | port->flags = tmp[0] ? PNP_PORT_FLAG_16BITADDR : 0; | |
9dd78466 | 494 | pnp_register_port_resource(option, port); |
1da177e4 LT |
495 | } |
496 | ||
497 | /* | |
498 | * Add fixed port resource to resources list. | |
499 | */ | |
1da177e4 | 500 | static void __init isapnp_parse_fixed_port_resource(struct pnp_option *option, |
9dd78466 | 501 | int size) |
1da177e4 LT |
502 | { |
503 | unsigned char tmp[3]; | |
504 | struct pnp_port *port; | |
505 | ||
506 | isapnp_peek(tmp, size); | |
cd861280 | 507 | port = kzalloc(sizeof(struct pnp_port), GFP_KERNEL); |
1da177e4 LT |
508 | if (!port) |
509 | return; | |
510 | port->min = port->max = (tmp[1] << 8) | tmp[0]; | |
511 | port->size = tmp[2]; | |
512 | port->align = 0; | |
513 | port->flags = PNP_PORT_FLAG_FIXED; | |
9dd78466 | 514 | pnp_register_port_resource(option, port); |
1da177e4 LT |
515 | } |
516 | ||
517 | /* | |
518 | * Add memory resource to resources list. | |
519 | */ | |
1da177e4 | 520 | static void __init isapnp_parse_mem_resource(struct pnp_option *option, |
9dd78466 | 521 | int size) |
1da177e4 LT |
522 | { |
523 | unsigned char tmp[9]; | |
524 | struct pnp_mem *mem; | |
525 | ||
526 | isapnp_peek(tmp, size); | |
cd861280 | 527 | mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL); |
1da177e4 LT |
528 | if (!mem) |
529 | return; | |
530 | mem->min = ((tmp[2] << 8) | tmp[1]) << 8; | |
531 | mem->max = ((tmp[4] << 8) | tmp[3]) << 8; | |
532 | mem->align = (tmp[6] << 8) | tmp[5]; | |
533 | mem->size = ((tmp[8] << 8) | tmp[7]) << 8; | |
534 | mem->flags = tmp[0]; | |
9dd78466 | 535 | pnp_register_mem_resource(option, mem); |
1da177e4 LT |
536 | } |
537 | ||
538 | /* | |
539 | * Add 32-bit memory resource to resources list. | |
540 | */ | |
1da177e4 | 541 | static void __init isapnp_parse_mem32_resource(struct pnp_option *option, |
9dd78466 | 542 | int size) |
1da177e4 LT |
543 | { |
544 | unsigned char tmp[17]; | |
545 | struct pnp_mem *mem; | |
546 | ||
547 | isapnp_peek(tmp, size); | |
cd861280 | 548 | mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL); |
1da177e4 LT |
549 | if (!mem) |
550 | return; | |
551 | mem->min = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1]; | |
552 | mem->max = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5]; | |
9dd78466 BH |
553 | mem->align = |
554 | (tmp[12] << 24) | (tmp[11] << 16) | (tmp[10] << 8) | tmp[9]; | |
555 | mem->size = | |
556 | (tmp[16] << 24) | (tmp[15] << 16) | (tmp[14] << 8) | tmp[13]; | |
1da177e4 | 557 | mem->flags = tmp[0]; |
9dd78466 | 558 | pnp_register_mem_resource(option, mem); |
1da177e4 LT |
559 | } |
560 | ||
561 | /* | |
562 | * Add 32-bit fixed memory resource to resources list. | |
563 | */ | |
1da177e4 | 564 | static void __init isapnp_parse_fixed_mem32_resource(struct pnp_option *option, |
9dd78466 | 565 | int size) |
1da177e4 LT |
566 | { |
567 | unsigned char tmp[9]; | |
568 | struct pnp_mem *mem; | |
569 | ||
570 | isapnp_peek(tmp, size); | |
cd861280 | 571 | mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL); |
1da177e4 LT |
572 | if (!mem) |
573 | return; | |
9dd78466 BH |
574 | mem->min = mem->max = |
575 | (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1]; | |
1da177e4 LT |
576 | mem->size = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5]; |
577 | mem->align = 0; | |
578 | mem->flags = tmp[0]; | |
9dd78466 | 579 | pnp_register_mem_resource(option, mem); |
1da177e4 LT |
580 | } |
581 | ||
582 | /* | |
583 | * Parse card name for ISA PnP device. | |
9dd78466 | 584 | */ |
1da177e4 LT |
585 | static void __init |
586 | isapnp_parse_name(char *name, unsigned int name_max, unsigned short *size) | |
587 | { | |
588 | if (name[0] == '\0') { | |
9dd78466 BH |
589 | unsigned short size1 = |
590 | *size >= name_max ? (name_max - 1) : *size; | |
1da177e4 LT |
591 | isapnp_peek(name, size1); |
592 | name[size1] = '\0'; | |
593 | *size -= size1; | |
594 | ||
595 | /* clean whitespace from end of string */ | |
9dd78466 | 596 | while (size1 > 0 && name[--size1] == ' ') |
1da177e4 LT |
597 | name[size1] = '\0'; |
598 | } | |
599 | } | |
600 | ||
601 | /* | |
602 | * Parse resource map for logical device. | |
603 | */ | |
1da177e4 LT |
604 | static int __init isapnp_create_device(struct pnp_card *card, |
605 | unsigned short size) | |
606 | { | |
607 | int number = 0, skip = 0, priority = 0, compat = 0; | |
608 | unsigned char type, tmp[17]; | |
609 | struct pnp_option *option; | |
610 | struct pnp_dev *dev; | |
07d4e9af | 611 | |
1da177e4 LT |
612 | if ((dev = isapnp_parse_device(card, size, number++)) == NULL) |
613 | return 1; | |
614 | option = pnp_register_independent_option(dev); | |
615 | if (!option) { | |
616 | kfree(dev); | |
617 | return 1; | |
618 | } | |
9dd78466 | 619 | pnp_add_card_device(card, dev); |
1da177e4 LT |
620 | |
621 | while (1) { | |
9dd78466 | 622 | if (isapnp_read_tag(&type, &size) < 0) |
1da177e4 LT |
623 | return 1; |
624 | if (skip && type != _STAG_LOGDEVID && type != _STAG_END) | |
625 | goto __skip; | |
626 | switch (type) { | |
627 | case _STAG_LOGDEVID: | |
628 | if (size >= 5 && size <= 6) { | |
9dd78466 BH |
629 | if ((dev = |
630 | isapnp_parse_device(card, size, | |
631 | number++)) == NULL) | |
1da177e4 LT |
632 | return 1; |
633 | size = 0; | |
634 | skip = 0; | |
635 | option = pnp_register_independent_option(dev); | |
656bde57 JJ |
636 | if (!option) { |
637 | kfree(dev); | |
1da177e4 | 638 | return 1; |
656bde57 | 639 | } |
9dd78466 | 640 | pnp_add_card_device(card, dev); |
1da177e4 LT |
641 | } else { |
642 | skip = 1; | |
643 | } | |
644 | priority = 0; | |
645 | compat = 0; | |
646 | break; | |
647 | case _STAG_COMPATDEVID: | |
648 | if (size == 4 && compat < DEVICE_COUNT_COMPATIBLE) { | |
649 | isapnp_peek(tmp, 4); | |
9dd78466 BH |
650 | isapnp_parse_id(dev, (tmp[1] << 8) | tmp[0], |
651 | (tmp[3] << 8) | tmp[2]); | |
1da177e4 LT |
652 | compat++; |
653 | size = 0; | |
654 | } | |
655 | break; | |
656 | case _STAG_IRQ: | |
657 | if (size < 2 || size > 3) | |
658 | goto __skip; | |
659 | isapnp_parse_irq_resource(option, size); | |
660 | size = 0; | |
661 | break; | |
662 | case _STAG_DMA: | |
663 | if (size != 2) | |
664 | goto __skip; | |
665 | isapnp_parse_dma_resource(option, size); | |
666 | size = 0; | |
667 | break; | |
668 | case _STAG_STARTDEP: | |
669 | if (size > 1) | |
670 | goto __skip; | |
671 | priority = 0x100 | PNP_RES_PRIORITY_ACCEPTABLE; | |
672 | if (size > 0) { | |
673 | isapnp_peek(tmp, size); | |
674 | priority = 0x100 | tmp[0]; | |
675 | size = 0; | |
676 | } | |
9dd78466 | 677 | option = pnp_register_dependent_option(dev, priority); |
1da177e4 LT |
678 | if (!option) |
679 | return 1; | |
680 | break; | |
681 | case _STAG_ENDDEP: | |
682 | if (size != 0) | |
683 | goto __skip; | |
684 | priority = 0; | |
685 | break; | |
686 | case _STAG_IOPORT: | |
687 | if (size != 7) | |
688 | goto __skip; | |
689 | isapnp_parse_port_resource(option, size); | |
690 | size = 0; | |
691 | break; | |
692 | case _STAG_FIXEDIO: | |
693 | if (size != 3) | |
694 | goto __skip; | |
695 | isapnp_parse_fixed_port_resource(option, size); | |
696 | size = 0; | |
697 | break; | |
698 | case _STAG_VENDOR: | |
699 | break; | |
700 | case _LTAG_MEMRANGE: | |
701 | if (size != 9) | |
702 | goto __skip; | |
703 | isapnp_parse_mem_resource(option, size); | |
704 | size = 0; | |
705 | break; | |
706 | case _LTAG_ANSISTR: | |
707 | isapnp_parse_name(dev->name, sizeof(dev->name), &size); | |
708 | break; | |
709 | case _LTAG_UNICODESTR: | |
710 | /* silently ignore */ | |
711 | /* who use unicode for hardware identification? */ | |
712 | break; | |
713 | case _LTAG_VENDOR: | |
714 | break; | |
715 | case _LTAG_MEM32RANGE: | |
716 | if (size != 17) | |
717 | goto __skip; | |
718 | isapnp_parse_mem32_resource(option, size); | |
719 | size = 0; | |
720 | break; | |
721 | case _LTAG_FIXEDMEM32RANGE: | |
722 | if (size != 9) | |
723 | goto __skip; | |
724 | isapnp_parse_fixed_mem32_resource(option, size); | |
725 | size = 0; | |
726 | break; | |
727 | case _STAG_END: | |
728 | if (size > 0) | |
729 | isapnp_skip_bytes(size); | |
730 | return 1; | |
731 | default: | |
9dd78466 BH |
732 | printk(KERN_ERR |
733 | "isapnp: unexpected or unknown tag type 0x%x for logical device %i (device %i), ignored\n", | |
734 | type, dev->number, card->number); | |
1da177e4 LT |
735 | } |
736 | __skip: | |
9dd78466 BH |
737 | if (size > 0) |
738 | isapnp_skip_bytes(size); | |
1da177e4 LT |
739 | } |
740 | return 0; | |
741 | } | |
742 | ||
743 | /* | |
744 | * Parse resource map for ISA PnP card. | |
745 | */ | |
1da177e4 LT |
746 | static void __init isapnp_parse_resource_map(struct pnp_card *card) |
747 | { | |
748 | unsigned char type, tmp[17]; | |
749 | unsigned short size; | |
750 | ||
751 | while (1) { | |
9dd78466 | 752 | if (isapnp_read_tag(&type, &size) < 0) |
1da177e4 LT |
753 | return; |
754 | switch (type) { | |
755 | case _STAG_PNPVERNO: | |
756 | if (size != 2) | |
757 | goto __skip; | |
758 | isapnp_peek(tmp, 2); | |
759 | card->pnpver = tmp[0]; | |
760 | card->productver = tmp[1]; | |
761 | size = 0; | |
762 | break; | |
763 | case _STAG_LOGDEVID: | |
764 | if (size >= 5 && size <= 6) { | |
9dd78466 | 765 | if (isapnp_create_device(card, size) == 1) |
1da177e4 LT |
766 | return; |
767 | size = 0; | |
768 | } | |
769 | break; | |
770 | case _STAG_VENDOR: | |
771 | break; | |
772 | case _LTAG_ANSISTR: | |
9dd78466 BH |
773 | isapnp_parse_name(card->name, sizeof(card->name), |
774 | &size); | |
1da177e4 LT |
775 | break; |
776 | case _LTAG_UNICODESTR: | |
777 | /* silently ignore */ | |
778 | /* who use unicode for hardware identification? */ | |
779 | break; | |
780 | case _LTAG_VENDOR: | |
781 | break; | |
782 | case _STAG_END: | |
783 | if (size > 0) | |
784 | isapnp_skip_bytes(size); | |
785 | return; | |
786 | default: | |
9dd78466 BH |
787 | printk(KERN_ERR |
788 | "isapnp: unexpected or unknown tag type 0x%x for device %i, ignored\n", | |
789 | type, card->number); | |
1da177e4 LT |
790 | } |
791 | __skip: | |
9dd78466 BH |
792 | if (size > 0) |
793 | isapnp_skip_bytes(size); | |
1da177e4 LT |
794 | } |
795 | } | |
796 | ||
797 | /* | |
798 | * Compute ISA PnP checksum for first eight bytes. | |
799 | */ | |
1da177e4 LT |
800 | static unsigned char __init isapnp_checksum(unsigned char *data) |
801 | { | |
802 | int i, j; | |
803 | unsigned char checksum = 0x6a, bit, b; | |
804 | ||
805 | for (i = 0; i < 8; i++) { | |
806 | b = data[i]; | |
807 | for (j = 0; j < 8; j++) { | |
808 | bit = 0; | |
809 | if (b & (1 << j)) | |
810 | bit = 1; | |
9dd78466 BH |
811 | checksum = |
812 | ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) | |
813 | | (checksum >> 1); | |
1da177e4 LT |
814 | } |
815 | } | |
816 | return checksum; | |
817 | } | |
818 | ||
819 | /* | |
820 | * Parse EISA id for ISA PnP card. | |
821 | */ | |
9dd78466 BH |
822 | static void isapnp_parse_card_id(struct pnp_card *card, unsigned short vendor, |
823 | unsigned short device) | |
1da177e4 | 824 | { |
9dd78466 | 825 | struct pnp_id *id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL); |
07d4e9af | 826 | |
1da177e4 LT |
827 | if (!id) |
828 | return; | |
829 | sprintf(id->id, "%c%c%c%x%x%x%x", | |
9dd78466 BH |
830 | 'A' + ((vendor >> 2) & 0x3f) - 1, |
831 | 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1, | |
832 | 'A' + ((vendor >> 8) & 0x1f) - 1, | |
833 | (device >> 4) & 0x0f, | |
834 | device & 0x0f, (device >> 12) & 0x0f, (device >> 8) & 0x0f); | |
835 | pnp_add_card_id(id, card); | |
1da177e4 LT |
836 | } |
837 | ||
838 | /* | |
839 | * Build device list for all present ISA PnP devices. | |
840 | */ | |
1da177e4 LT |
841 | static int __init isapnp_build_device_list(void) |
842 | { | |
843 | int csn; | |
844 | unsigned char header[9], checksum; | |
845 | struct pnp_card *card; | |
846 | ||
847 | isapnp_wait(); | |
848 | isapnp_key(); | |
849 | for (csn = 1; csn <= isapnp_csn_count; csn++) { | |
850 | isapnp_wake(csn); | |
851 | isapnp_peek(header, 9); | |
852 | checksum = isapnp_checksum(header); | |
853 | #if 0 | |
9dd78466 BH |
854 | printk(KERN_DEBUG |
855 | "vendor: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n", | |
856 | header[0], header[1], header[2], header[3], header[4], | |
857 | header[5], header[6], header[7], header[8]); | |
1da177e4 LT |
858 | printk(KERN_DEBUG "checksum = 0x%x\n", checksum); |
859 | #endif | |
9dd78466 BH |
860 | if ((card = |
861 | kzalloc(sizeof(struct pnp_card), GFP_KERNEL)) == NULL) | |
1da177e4 LT |
862 | continue; |
863 | ||
864 | card->number = csn; | |
865 | INIT_LIST_HEAD(&card->devices); | |
9dd78466 BH |
866 | isapnp_parse_card_id(card, (header[1] << 8) | header[0], |
867 | (header[3] << 8) | header[2]); | |
868 | card->serial = | |
869 | (header[7] << 24) | (header[6] << 16) | (header[5] << 8) | | |
870 | header[4]; | |
1da177e4 LT |
871 | isapnp_checksum_value = 0x00; |
872 | isapnp_parse_resource_map(card); | |
873 | if (isapnp_checksum_value != 0x00) | |
9dd78466 BH |
874 | printk(KERN_ERR |
875 | "isapnp: checksum for device %i is not valid (0x%x)\n", | |
876 | csn, isapnp_checksum_value); | |
1da177e4 LT |
877 | card->checksum = isapnp_checksum_value; |
878 | card->protocol = &isapnp_protocol; | |
879 | ||
880 | pnp_add_card(card); | |
881 | } | |
882 | isapnp_wait(); | |
883 | return 0; | |
884 | } | |
885 | ||
886 | /* | |
887 | * Basic configuration routines. | |
888 | */ | |
889 | ||
890 | int isapnp_present(void) | |
891 | { | |
892 | struct pnp_card *card; | |
07d4e9af | 893 | |
1da177e4 LT |
894 | pnp_for_each_card(card) { |
895 | if (card->protocol == &isapnp_protocol) | |
896 | return 1; | |
897 | } | |
898 | return 0; | |
899 | } | |
900 | ||
901 | int isapnp_cfg_begin(int csn, int logdev) | |
902 | { | |
903 | if (csn < 1 || csn > isapnp_csn_count || logdev > 10) | |
904 | return -EINVAL; | |
14cc3e2b | 905 | mutex_lock(&isapnp_cfg_mutex); |
1da177e4 LT |
906 | isapnp_wait(); |
907 | isapnp_key(); | |
908 | isapnp_wake(csn); | |
909 | #if 0 | |
910 | /* to avoid malfunction when the isapnptools package is used */ | |
911 | /* we must set RDP to our value again */ | |
912 | /* it is possible to set RDP only in the isolation phase */ | |
913 | /* Jens Thoms Toerring <Jens.Toerring@physik.fu-berlin.de> */ | |
914 | isapnp_write_byte(0x02, 0x04); /* clear CSN of card */ | |
9dd78466 BH |
915 | mdelay(2); /* is this necessary? */ |
916 | isapnp_wake(csn); /* bring card into sleep state */ | |
917 | isapnp_wake(0); /* bring card into isolation state */ | |
918 | isapnp_set_rdp(); /* reset the RDP port */ | |
919 | udelay(1000); /* delay 1000us */ | |
1da177e4 | 920 | isapnp_write_byte(0x06, csn); /* reset CSN to previous value */ |
9dd78466 | 921 | udelay(250); /* is this necessary? */ |
1da177e4 LT |
922 | #endif |
923 | if (logdev >= 0) | |
924 | isapnp_device(logdev); | |
925 | return 0; | |
926 | } | |
927 | ||
928 | int isapnp_cfg_end(void) | |
929 | { | |
930 | isapnp_wait(); | |
14cc3e2b | 931 | mutex_unlock(&isapnp_cfg_mutex); |
1da177e4 LT |
932 | return 0; |
933 | } | |
934 | ||
1da177e4 | 935 | /* |
07d4e9af | 936 | * Initialization. |
1da177e4 LT |
937 | */ |
938 | ||
1da177e4 LT |
939 | EXPORT_SYMBOL(isapnp_protocol); |
940 | EXPORT_SYMBOL(isapnp_present); | |
941 | EXPORT_SYMBOL(isapnp_cfg_begin); | |
942 | EXPORT_SYMBOL(isapnp_cfg_end); | |
b449f63c | 943 | #if 0 |
1da177e4 | 944 | EXPORT_SYMBOL(isapnp_read_byte); |
b449f63c | 945 | #endif |
1da177e4 LT |
946 | EXPORT_SYMBOL(isapnp_write_byte); |
947 | ||
9dd78466 BH |
948 | static int isapnp_read_resources(struct pnp_dev *dev, |
949 | struct pnp_resource_table *res) | |
1da177e4 LT |
950 | { |
951 | int tmp, ret; | |
952 | ||
953 | dev->active = isapnp_read_byte(ISAPNP_CFG_ACTIVATE); | |
954 | if (dev->active) { | |
955 | for (tmp = 0; tmp < PNP_MAX_PORT; tmp++) { | |
956 | ret = isapnp_read_word(ISAPNP_CFG_PORT + (tmp << 1)); | |
957 | if (!ret) | |
958 | continue; | |
959 | res->port_resource[tmp].start = ret; | |
960 | res->port_resource[tmp].flags = IORESOURCE_IO; | |
961 | } | |
962 | for (tmp = 0; tmp < PNP_MAX_MEM; tmp++) { | |
9dd78466 BH |
963 | ret = |
964 | isapnp_read_word(ISAPNP_CFG_MEM + (tmp << 3)) << 8; | |
1da177e4 LT |
965 | if (!ret) |
966 | continue; | |
967 | res->mem_resource[tmp].start = ret; | |
968 | res->mem_resource[tmp].flags = IORESOURCE_MEM; | |
969 | } | |
970 | for (tmp = 0; tmp < PNP_MAX_IRQ; tmp++) { | |
9dd78466 BH |
971 | ret = |
972 | (isapnp_read_word(ISAPNP_CFG_IRQ + (tmp << 1)) >> | |
973 | 8); | |
1da177e4 LT |
974 | if (!ret) |
975 | continue; | |
9dd78466 BH |
976 | res->irq_resource[tmp].start = |
977 | res->irq_resource[tmp].end = ret; | |
1da177e4 LT |
978 | res->irq_resource[tmp].flags = IORESOURCE_IRQ; |
979 | } | |
980 | for (tmp = 0; tmp < PNP_MAX_DMA; tmp++) { | |
981 | ret = isapnp_read_byte(ISAPNP_CFG_DMA + tmp); | |
982 | if (ret == 4) | |
983 | continue; | |
9dd78466 BH |
984 | res->dma_resource[tmp].start = |
985 | res->dma_resource[tmp].end = ret; | |
1da177e4 LT |
986 | res->dma_resource[tmp].flags = IORESOURCE_DMA; |
987 | } | |
988 | } | |
989 | return 0; | |
990 | } | |
991 | ||
9dd78466 BH |
992 | static int isapnp_get_resources(struct pnp_dev *dev, |
993 | struct pnp_resource_table *res) | |
1da177e4 LT |
994 | { |
995 | int ret; | |
996 | pnp_init_resource_table(res); | |
997 | isapnp_cfg_begin(dev->card->number, dev->number); | |
998 | ret = isapnp_read_resources(dev, res); | |
999 | isapnp_cfg_end(); | |
1000 | return ret; | |
1001 | } | |
1002 | ||
9dd78466 BH |
1003 | static int isapnp_set_resources(struct pnp_dev *dev, |
1004 | struct pnp_resource_table *res) | |
1da177e4 LT |
1005 | { |
1006 | int tmp; | |
1007 | ||
1008 | isapnp_cfg_begin(dev->card->number, dev->number); | |
1009 | dev->active = 1; | |
9dd78466 BH |
1010 | for (tmp = 0; |
1011 | tmp < PNP_MAX_PORT | |
1012 | && (res->port_resource[tmp]. | |
1013 | flags & (IORESOURCE_IO | IORESOURCE_UNSET)) == IORESOURCE_IO; | |
1014 | tmp++) | |
1015 | isapnp_write_word(ISAPNP_CFG_PORT + (tmp << 1), | |
1016 | res->port_resource[tmp].start); | |
1017 | for (tmp = 0; | |
1018 | tmp < PNP_MAX_IRQ | |
1019 | && (res->irq_resource[tmp]. | |
1020 | flags & (IORESOURCE_IRQ | IORESOURCE_UNSET)) == IORESOURCE_IRQ; | |
1021 | tmp++) { | |
1da177e4 LT |
1022 | int irq = res->irq_resource[tmp].start; |
1023 | if (irq == 2) | |
1024 | irq = 9; | |
9dd78466 | 1025 | isapnp_write_byte(ISAPNP_CFG_IRQ + (tmp << 1), irq); |
1da177e4 | 1026 | } |
9dd78466 BH |
1027 | for (tmp = 0; |
1028 | tmp < PNP_MAX_DMA | |
1029 | && (res->dma_resource[tmp]. | |
1030 | flags & (IORESOURCE_DMA | IORESOURCE_UNSET)) == IORESOURCE_DMA; | |
1031 | tmp++) | |
1032 | isapnp_write_byte(ISAPNP_CFG_DMA + tmp, | |
1033 | res->dma_resource[tmp].start); | |
1034 | for (tmp = 0; | |
1035 | tmp < PNP_MAX_MEM | |
1036 | && (res->mem_resource[tmp]. | |
1037 | flags & (IORESOURCE_MEM | IORESOURCE_UNSET)) == IORESOURCE_MEM; | |
1038 | tmp++) | |
1039 | isapnp_write_word(ISAPNP_CFG_MEM + (tmp << 3), | |
1040 | (res->mem_resource[tmp].start >> 8) & 0xffff); | |
1da177e4 LT |
1041 | /* FIXME: We aren't handling 32bit mems properly here */ |
1042 | isapnp_activate(dev->number); | |
1043 | isapnp_cfg_end(); | |
1044 | return 0; | |
1045 | } | |
1046 | ||
1047 | static int isapnp_disable_resources(struct pnp_dev *dev) | |
1048 | { | |
1049 | if (!dev || !dev->active) | |
1050 | return -EINVAL; | |
1051 | isapnp_cfg_begin(dev->card->number, dev->number); | |
1052 | isapnp_deactivate(dev->number); | |
1053 | dev->active = 0; | |
1054 | isapnp_cfg_end(); | |
1055 | return 0; | |
1056 | } | |
1057 | ||
1058 | struct pnp_protocol isapnp_protocol = { | |
9dd78466 BH |
1059 | .name = "ISA Plug and Play", |
1060 | .get = isapnp_get_resources, | |
1061 | .set = isapnp_set_resources, | |
1da177e4 LT |
1062 | .disable = isapnp_disable_resources, |
1063 | }; | |
1064 | ||
1065 | static int __init isapnp_init(void) | |
1066 | { | |
1067 | int cards; | |
1068 | struct pnp_card *card; | |
1069 | struct pnp_dev *dev; | |
1070 | ||
1071 | if (isapnp_disable) { | |
1072 | isapnp_detected = 0; | |
1073 | printk(KERN_INFO "isapnp: ISA Plug & Play support disabled\n"); | |
1074 | return 0; | |
1075 | } | |
07bd1c4a DW |
1076 | #ifdef CONFIG_PPC_MERGE |
1077 | if (check_legacy_ioport(_PIDXR) || check_legacy_ioport(_PNPWRP)) | |
1078 | return -EINVAL; | |
1079 | #endif | |
1da177e4 LT |
1080 | #ifdef ISAPNP_REGION_OK |
1081 | if (!request_region(_PIDXR, 1, "isapnp index")) { | |
9dd78466 BH |
1082 | printk(KERN_ERR "isapnp: Index Register 0x%x already used\n", |
1083 | _PIDXR); | |
1da177e4 LT |
1084 | return -EBUSY; |
1085 | } | |
1086 | #endif | |
1087 | if (!request_region(_PNPWRP, 1, "isapnp write")) { | |
9dd78466 BH |
1088 | printk(KERN_ERR |
1089 | "isapnp: Write Data Register 0x%x already used\n", | |
1090 | _PNPWRP); | |
1da177e4 LT |
1091 | #ifdef ISAPNP_REGION_OK |
1092 | release_region(_PIDXR, 1); | |
1093 | #endif | |
1094 | return -EBUSY; | |
1095 | } | |
1096 | ||
9dd78466 | 1097 | if (pnp_register_protocol(&isapnp_protocol) < 0) |
1da177e4 LT |
1098 | return -EBUSY; |
1099 | ||
1100 | /* | |
9dd78466 BH |
1101 | * Print a message. The existing ISAPnP code is hanging machines |
1102 | * so let the user know where. | |
1da177e4 | 1103 | */ |
9dd78466 | 1104 | |
1da177e4 LT |
1105 | printk(KERN_INFO "isapnp: Scanning for PnP cards...\n"); |
1106 | if (isapnp_rdp >= 0x203 && isapnp_rdp <= 0x3ff) { | |
1107 | isapnp_rdp |= 3; | |
1108 | if (!request_region(isapnp_rdp, 1, "isapnp read")) { | |
9dd78466 BH |
1109 | printk(KERN_ERR |
1110 | "isapnp: Read Data Register 0x%x already used\n", | |
1111 | isapnp_rdp); | |
1da177e4 LT |
1112 | #ifdef ISAPNP_REGION_OK |
1113 | release_region(_PIDXR, 1); | |
1114 | #endif | |
1115 | release_region(_PNPWRP, 1); | |
1116 | return -EBUSY; | |
1117 | } | |
1118 | isapnp_set_rdp(); | |
1119 | } | |
1120 | isapnp_detected = 1; | |
1121 | if (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff) { | |
1122 | cards = isapnp_isolate(); | |
9dd78466 | 1123 | if (cards < 0 || (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff)) { |
1da177e4 LT |
1124 | #ifdef ISAPNP_REGION_OK |
1125 | release_region(_PIDXR, 1); | |
1126 | #endif | |
1127 | release_region(_PNPWRP, 1); | |
1128 | isapnp_detected = 0; | |
9dd78466 BH |
1129 | printk(KERN_INFO |
1130 | "isapnp: No Plug & Play device found\n"); | |
1da177e4 LT |
1131 | return 0; |
1132 | } | |
1133 | request_region(isapnp_rdp, 1, "isapnp read"); | |
1134 | } | |
1135 | isapnp_build_device_list(); | |
1136 | cards = 0; | |
1137 | ||
9dd78466 | 1138 | protocol_for_each_card(&isapnp_protocol, card) { |
1da177e4 LT |
1139 | cards++; |
1140 | if (isapnp_verbose) { | |
9dd78466 BH |
1141 | printk(KERN_INFO "isapnp: Card '%s'\n", |
1142 | card->name[0] ? card->name : "Unknown"); | |
1da177e4 LT |
1143 | if (isapnp_verbose < 2) |
1144 | continue; | |
9dd78466 BH |
1145 | card_for_each_dev(card, dev) { |
1146 | printk(KERN_INFO "isapnp: Device '%s'\n", | |
1147 | dev->name[0] ? dev->name : "Unknown"); | |
1da177e4 LT |
1148 | } |
1149 | } | |
1150 | } | |
1151 | if (cards) { | |
9dd78466 BH |
1152 | printk(KERN_INFO |
1153 | "isapnp: %i Plug & Play card%s detected total\n", cards, | |
1154 | cards > 1 ? "s" : ""); | |
1da177e4 LT |
1155 | } else { |
1156 | printk(KERN_INFO "isapnp: No Plug & Play card found\n"); | |
1157 | } | |
1158 | ||
1159 | isapnp_proc_init(); | |
1160 | return 0; | |
1161 | } | |
1162 | ||
1163 | device_initcall(isapnp_init); | |
1164 | ||
1165 | /* format is: noisapnp */ | |
1166 | ||
1167 | static int __init isapnp_setup_disable(char *str) | |
1168 | { | |
1169 | isapnp_disable = 1; | |
1170 | return 1; | |
1171 | } | |
1172 | ||
1173 | __setup("noisapnp", isapnp_setup_disable); | |
1174 | ||
1175 | /* format is: isapnp=rdp,reset,skip_pci_scan,verbose */ | |
1176 | ||
1177 | static int __init isapnp_setup_isapnp(char *str) | |
1178 | { | |
9dd78466 BH |
1179 | (void)((get_option(&str, &isapnp_rdp) == 2) && |
1180 | (get_option(&str, &isapnp_reset) == 2) && | |
1181 | (get_option(&str, &isapnp_verbose) == 2)); | |
1da177e4 LT |
1182 | return 1; |
1183 | } | |
1184 | ||
1185 | __setup("isapnp=", isapnp_setup_isapnp); |