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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * ISA Plug & Play support | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
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 | |
1da177e4 | 50 | |
9dd78466 BH |
51 | int isapnp_disable; /* Disable ISA PnP */ |
52 | static int isapnp_rdp; /* Read Data Port */ | |
53 | static int isapnp_reset = 1; /* reset all PnP cards (deactivate) */ | |
54 | static int isapnp_verbose = 1; /* verbose mode */ | |
1da177e4 | 55 | |
c1017a4c | 56 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
1da177e4 LT |
57 | MODULE_DESCRIPTION("Generic ISA Plug & Play support"); |
58 | module_param(isapnp_disable, int, 0); | |
59 | MODULE_PARM_DESC(isapnp_disable, "ISA Plug & Play disable"); | |
60 | module_param(isapnp_rdp, int, 0); | |
61 | MODULE_PARM_DESC(isapnp_rdp, "ISA Plug & Play read data port"); | |
62 | module_param(isapnp_reset, int, 0); | |
63 | MODULE_PARM_DESC(isapnp_reset, "ISA Plug & Play reset all cards"); | |
64 | module_param(isapnp_verbose, int, 0); | |
65 | MODULE_PARM_DESC(isapnp_verbose, "ISA Plug & Play verbose mode"); | |
66 | MODULE_LICENSE("GPL"); | |
67 | ||
68 | #define _PIDXR 0x279 | |
69 | #define _PNPWRP 0xa79 | |
70 | ||
71 | /* short tags */ | |
72 | #define _STAG_PNPVERNO 0x01 | |
73 | #define _STAG_LOGDEVID 0x02 | |
74 | #define _STAG_COMPATDEVID 0x03 | |
75 | #define _STAG_IRQ 0x04 | |
76 | #define _STAG_DMA 0x05 | |
77 | #define _STAG_STARTDEP 0x06 | |
78 | #define _STAG_ENDDEP 0x07 | |
79 | #define _STAG_IOPORT 0x08 | |
80 | #define _STAG_FIXEDIO 0x09 | |
81 | #define _STAG_VENDOR 0x0e | |
82 | #define _STAG_END 0x0f | |
83 | /* long tags */ | |
84 | #define _LTAG_MEMRANGE 0x81 | |
85 | #define _LTAG_ANSISTR 0x82 | |
86 | #define _LTAG_UNICODESTR 0x83 | |
87 | #define _LTAG_VENDOR 0x84 | |
88 | #define _LTAG_MEM32RANGE 0x85 | |
89 | #define _LTAG_FIXEDMEM32RANGE 0x86 | |
90 | ||
91 | static unsigned char isapnp_checksum_value; | |
14cc3e2b | 92 | static DEFINE_MUTEX(isapnp_cfg_mutex); |
1da177e4 LT |
93 | static int isapnp_csn_count; |
94 | ||
95 | /* some prototypes */ | |
96 | ||
97 | static inline void write_data(unsigned char x) | |
98 | { | |
99 | outb(x, _PNPWRP); | |
100 | } | |
101 | ||
102 | static inline void write_address(unsigned char x) | |
103 | { | |
104 | outb(x, _PIDXR); | |
105 | udelay(20); | |
106 | } | |
107 | ||
108 | static inline unsigned char read_data(void) | |
109 | { | |
110 | unsigned char val = inb(isapnp_rdp); | |
111 | return val; | |
112 | } | |
113 | ||
114 | unsigned char isapnp_read_byte(unsigned char idx) | |
115 | { | |
116 | write_address(idx); | |
117 | return read_data(); | |
118 | } | |
119 | ||
120 | static unsigned short isapnp_read_word(unsigned char idx) | |
121 | { | |
122 | unsigned short val; | |
123 | ||
124 | val = isapnp_read_byte(idx); | |
9dd78466 | 125 | val = (val << 8) + isapnp_read_byte(idx + 1); |
1da177e4 LT |
126 | return val; |
127 | } | |
128 | ||
129 | void isapnp_write_byte(unsigned char idx, unsigned char val) | |
130 | { | |
131 | write_address(idx); | |
132 | write_data(val); | |
133 | } | |
134 | ||
135 | static void isapnp_write_word(unsigned char idx, unsigned short val) | |
136 | { | |
137 | isapnp_write_byte(idx, val >> 8); | |
9dd78466 | 138 | isapnp_write_byte(idx + 1, val); |
1da177e4 LT |
139 | } |
140 | ||
1da177e4 LT |
141 | static void isapnp_key(void) |
142 | { | |
143 | unsigned char code = 0x6a, msb; | |
144 | int i; | |
145 | ||
146 | mdelay(1); | |
147 | write_address(0x00); | |
148 | write_address(0x00); | |
149 | ||
150 | write_address(code); | |
151 | ||
152 | for (i = 1; i < 32; i++) { | |
153 | msb = ((code & 0x01) ^ ((code & 0x02) >> 1)) << 7; | |
154 | code = (code >> 1) | msb; | |
155 | write_address(code); | |
156 | } | |
157 | } | |
158 | ||
159 | /* place all pnp cards in wait-for-key state */ | |
160 | static void isapnp_wait(void) | |
161 | { | |
162 | isapnp_write_byte(0x02, 0x02); | |
163 | } | |
164 | ||
165 | static void isapnp_wake(unsigned char csn) | |
166 | { | |
167 | isapnp_write_byte(0x03, csn); | |
168 | } | |
169 | ||
170 | static void isapnp_device(unsigned char logdev) | |
171 | { | |
172 | isapnp_write_byte(0x07, logdev); | |
173 | } | |
174 | ||
175 | static void isapnp_activate(unsigned char logdev) | |
176 | { | |
177 | isapnp_device(logdev); | |
178 | isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 1); | |
179 | udelay(250); | |
180 | } | |
181 | ||
182 | static void isapnp_deactivate(unsigned char logdev) | |
183 | { | |
184 | isapnp_device(logdev); | |
185 | isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 0); | |
186 | udelay(500); | |
187 | } | |
188 | ||
189 | static void __init isapnp_peek(unsigned char *data, int bytes) | |
190 | { | |
191 | int i, j; | |
9dd78466 | 192 | unsigned char d = 0; |
1da177e4 LT |
193 | |
194 | for (i = 1; i <= bytes; i++) { | |
195 | for (j = 0; j < 20; j++) { | |
196 | d = isapnp_read_byte(0x05); | |
197 | if (d & 1) | |
198 | break; | |
199 | udelay(100); | |
200 | } | |
201 | if (!(d & 1)) { | |
202 | if (data != NULL) | |
203 | *data++ = 0xff; | |
204 | continue; | |
205 | } | |
206 | d = isapnp_read_byte(0x04); /* PRESDI */ | |
207 | isapnp_checksum_value += d; | |
208 | if (data != NULL) | |
209 | *data++ = d; | |
210 | } | |
211 | } | |
212 | ||
213 | #define RDP_STEP 32 /* minimum is 4 */ | |
214 | ||
215 | static int isapnp_next_rdp(void) | |
216 | { | |
217 | int rdp = isapnp_rdp; | |
218 | static int old_rdp = 0; | |
9dd78466 BH |
219 | |
220 | if (old_rdp) { | |
1da177e4 LT |
221 | release_region(old_rdp, 1); |
222 | old_rdp = 0; | |
223 | } | |
224 | while (rdp <= 0x3ff) { | |
225 | /* | |
9dd78466 BH |
226 | * We cannot use NE2000 probe spaces for ISAPnP or we |
227 | * will lock up machines. | |
1da177e4 | 228 | */ |
9dd78466 BH |
229 | if ((rdp < 0x280 || rdp > 0x380) |
230 | && request_region(rdp, 1, "ISAPnP")) { | |
1da177e4 LT |
231 | isapnp_rdp = rdp; |
232 | old_rdp = rdp; | |
233 | return 0; | |
234 | } | |
235 | rdp += RDP_STEP; | |
236 | } | |
237 | return -1; | |
238 | } | |
239 | ||
240 | /* Set read port address */ | |
241 | static inline void isapnp_set_rdp(void) | |
242 | { | |
243 | isapnp_write_byte(0x00, isapnp_rdp >> 2); | |
244 | udelay(100); | |
245 | } | |
246 | ||
247 | /* | |
248 | * Perform an isolation. The port selection code now tries to avoid | |
249 | * "dangerous to read" ports. | |
250 | */ | |
1da177e4 LT |
251 | static int __init isapnp_isolate_rdp_select(void) |
252 | { | |
253 | isapnp_wait(); | |
254 | isapnp_key(); | |
255 | ||
256 | /* Control: reset CSN and conditionally everything else too */ | |
257 | isapnp_write_byte(0x02, isapnp_reset ? 0x05 : 0x04); | |
258 | mdelay(2); | |
259 | ||
260 | isapnp_wait(); | |
261 | isapnp_key(); | |
262 | isapnp_wake(0x00); | |
263 | ||
264 | if (isapnp_next_rdp() < 0) { | |
265 | isapnp_wait(); | |
266 | return -1; | |
267 | } | |
268 | ||
269 | isapnp_set_rdp(); | |
270 | udelay(1000); | |
271 | write_address(0x01); | |
272 | udelay(1000); | |
273 | return 0; | |
274 | } | |
275 | ||
276 | /* | |
277 | * Isolate (assign uniqued CSN) to all ISA PnP devices. | |
278 | */ | |
1da177e4 LT |
279 | static int __init isapnp_isolate(void) |
280 | { | |
281 | unsigned char checksum = 0x6a; | |
282 | unsigned char chksum = 0x00; | |
283 | unsigned char bit = 0x00; | |
284 | int data; | |
285 | int csn = 0; | |
286 | int i; | |
287 | int iteration = 1; | |
288 | ||
289 | isapnp_rdp = 0x213; | |
290 | if (isapnp_isolate_rdp_select() < 0) | |
291 | return -1; | |
292 | ||
293 | while (1) { | |
294 | for (i = 1; i <= 64; i++) { | |
295 | data = read_data() << 8; | |
296 | udelay(250); | |
297 | data = data | read_data(); | |
298 | udelay(250); | |
299 | if (data == 0x55aa) | |
300 | bit = 0x01; | |
9dd78466 BH |
301 | checksum = |
302 | ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) | |
303 | | (checksum >> 1); | |
1da177e4 LT |
304 | bit = 0x00; |
305 | } | |
306 | for (i = 65; i <= 72; i++) { | |
307 | data = read_data() << 8; | |
308 | udelay(250); | |
309 | data = data | read_data(); | |
310 | udelay(250); | |
311 | if (data == 0x55aa) | |
312 | chksum |= (1 << (i - 65)); | |
313 | } | |
314 | if (checksum != 0x00 && checksum == chksum) { | |
315 | csn++; | |
316 | ||
317 | isapnp_write_byte(0x06, csn); | |
318 | udelay(250); | |
319 | iteration++; | |
320 | isapnp_wake(0x00); | |
321 | isapnp_set_rdp(); | |
322 | udelay(1000); | |
323 | write_address(0x01); | |
324 | udelay(1000); | |
325 | goto __next; | |
326 | } | |
327 | if (iteration == 1) { | |
328 | isapnp_rdp += RDP_STEP; | |
329 | if (isapnp_isolate_rdp_select() < 0) | |
330 | return -1; | |
331 | } else if (iteration > 1) { | |
332 | break; | |
333 | } | |
1e0aa9ad | 334 | __next: |
1da177e4 LT |
335 | if (csn == 255) |
336 | break; | |
337 | checksum = 0x6a; | |
338 | chksum = 0x00; | |
339 | bit = 0x00; | |
340 | } | |
341 | isapnp_wait(); | |
342 | isapnp_csn_count = csn; | |
343 | return csn; | |
344 | } | |
345 | ||
346 | /* | |
347 | * Read one tag from stream. | |
348 | */ | |
1da177e4 LT |
349 | static int __init isapnp_read_tag(unsigned char *type, unsigned short *size) |
350 | { | |
351 | unsigned char tag, tmp[2]; | |
352 | ||
353 | isapnp_peek(&tag, 1); | |
9dd78466 | 354 | if (tag == 0) /* invalid tag */ |
1da177e4 LT |
355 | return -1; |
356 | if (tag & 0x80) { /* large item */ | |
357 | *type = tag; | |
358 | isapnp_peek(tmp, 2); | |
359 | *size = (tmp[1] << 8) | tmp[0]; | |
360 | } else { | |
361 | *type = (tag >> 3) & 0x0f; | |
362 | *size = tag & 0x07; | |
363 | } | |
364 | #if 0 | |
9dd78466 BH |
365 | printk(KERN_DEBUG "tag = 0x%x, type = 0x%x, size = %i\n", tag, *type, |
366 | *size); | |
1da177e4 | 367 | #endif |
1da177e4 LT |
368 | if (*type == 0xff && *size == 0xffff) /* probably invalid data */ |
369 | return -1; | |
370 | return 0; | |
371 | } | |
372 | ||
373 | /* | |
374 | * Skip specified number of bytes from stream. | |
375 | */ | |
1da177e4 LT |
376 | static void __init isapnp_skip_bytes(int count) |
377 | { | |
378 | isapnp_peek(NULL, count); | |
379 | } | |
380 | ||
381 | /* | |
382 | * Parse EISA id. | |
383 | */ | |
9dd78466 BH |
384 | static void isapnp_parse_id(struct pnp_dev *dev, unsigned short vendor, |
385 | unsigned short device) | |
1da177e4 | 386 | { |
9dd78466 | 387 | struct pnp_id *id; |
07d4e9af | 388 | |
1da177e4 LT |
389 | if (!dev) |
390 | return; | |
cd861280 | 391 | id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL); |
1da177e4 LT |
392 | if (!id) |
393 | return; | |
394 | sprintf(id->id, "%c%c%c%x%x%x%x", | |
9dd78466 BH |
395 | 'A' + ((vendor >> 2) & 0x3f) - 1, |
396 | 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1, | |
397 | 'A' + ((vendor >> 8) & 0x1f) - 1, | |
398 | (device >> 4) & 0x0f, | |
399 | device & 0x0f, (device >> 12) & 0x0f, (device >> 8) & 0x0f); | |
1da177e4 LT |
400 | pnp_add_id(id, dev); |
401 | } | |
402 | ||
403 | /* | |
404 | * Parse logical device tag. | |
405 | */ | |
9dd78466 BH |
406 | static struct pnp_dev *__init isapnp_parse_device(struct pnp_card *card, |
407 | int size, int number) | |
1da177e4 LT |
408 | { |
409 | unsigned char tmp[6]; | |
410 | struct pnp_dev *dev; | |
411 | ||
412 | isapnp_peek(tmp, size); | |
cd861280 | 413 | dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL); |
1da177e4 LT |
414 | if (!dev) |
415 | return NULL; | |
416 | dev->number = number; | |
417 | isapnp_parse_id(dev, (tmp[1] << 8) | tmp[0], (tmp[3] << 8) | tmp[2]); | |
418 | dev->regs = tmp[4]; | |
419 | dev->card = card; | |
420 | if (size > 5) | |
421 | dev->regs |= tmp[5] << 8; | |
422 | dev->protocol = &isapnp_protocol; | |
423 | dev->capabilities |= PNP_CONFIGURABLE; | |
424 | dev->capabilities |= PNP_READ; | |
425 | dev->capabilities |= PNP_WRITE; | |
426 | dev->capabilities |= PNP_DISABLE; | |
427 | pnp_init_resource_table(&dev->res); | |
428 | return dev; | |
429 | } | |
430 | ||
1da177e4 LT |
431 | /* |
432 | * Add IRQ resource to resources list. | |
433 | */ | |
1da177e4 | 434 | static void __init isapnp_parse_irq_resource(struct pnp_option *option, |
9dd78466 | 435 | int size) |
1da177e4 LT |
436 | { |
437 | unsigned char tmp[3]; | |
438 | struct pnp_irq *irq; | |
439 | unsigned long bits; | |
440 | ||
441 | isapnp_peek(tmp, size); | |
cd861280 | 442 | irq = kzalloc(sizeof(struct pnp_irq), GFP_KERNEL); |
1da177e4 LT |
443 | if (!irq) |
444 | return; | |
445 | bits = (tmp[1] << 8) | tmp[0]; | |
446 | bitmap_copy(irq->map, &bits, 16); | |
447 | if (size > 2) | |
448 | irq->flags = tmp[2]; | |
449 | else | |
450 | irq->flags = IORESOURCE_IRQ_HIGHEDGE; | |
451 | pnp_register_irq_resource(option, irq); | |
1da177e4 LT |
452 | } |
453 | ||
454 | /* | |
455 | * Add DMA resource to resources list. | |
456 | */ | |
1da177e4 | 457 | static void __init isapnp_parse_dma_resource(struct pnp_option *option, |
9dd78466 | 458 | int size) |
1da177e4 LT |
459 | { |
460 | unsigned char tmp[2]; | |
461 | struct pnp_dma *dma; | |
462 | ||
463 | isapnp_peek(tmp, size); | |
cd861280 | 464 | dma = kzalloc(sizeof(struct pnp_dma), GFP_KERNEL); |
1da177e4 LT |
465 | if (!dma) |
466 | return; | |
467 | dma->map = tmp[0]; | |
468 | dma->flags = tmp[1]; | |
469 | pnp_register_dma_resource(option, dma); | |
1da177e4 LT |
470 | } |
471 | ||
472 | /* | |
473 | * Add port resource to resources list. | |
474 | */ | |
1da177e4 | 475 | static void __init isapnp_parse_port_resource(struct pnp_option *option, |
9dd78466 | 476 | int size) |
1da177e4 LT |
477 | { |
478 | unsigned char tmp[7]; | |
479 | struct pnp_port *port; | |
480 | ||
481 | isapnp_peek(tmp, size); | |
cd861280 | 482 | port = kzalloc(sizeof(struct pnp_port), GFP_KERNEL); |
1da177e4 LT |
483 | if (!port) |
484 | return; | |
485 | port->min = (tmp[2] << 8) | tmp[1]; | |
486 | port->max = (tmp[4] << 8) | tmp[3]; | |
487 | port->align = tmp[5]; | |
488 | port->size = tmp[6]; | |
489 | port->flags = tmp[0] ? PNP_PORT_FLAG_16BITADDR : 0; | |
9dd78466 | 490 | pnp_register_port_resource(option, port); |
1da177e4 LT |
491 | } |
492 | ||
493 | /* | |
494 | * Add fixed port resource to resources list. | |
495 | */ | |
1da177e4 | 496 | static void __init isapnp_parse_fixed_port_resource(struct pnp_option *option, |
9dd78466 | 497 | int size) |
1da177e4 LT |
498 | { |
499 | unsigned char tmp[3]; | |
500 | struct pnp_port *port; | |
501 | ||
502 | isapnp_peek(tmp, size); | |
cd861280 | 503 | port = kzalloc(sizeof(struct pnp_port), GFP_KERNEL); |
1da177e4 LT |
504 | if (!port) |
505 | return; | |
506 | port->min = port->max = (tmp[1] << 8) | tmp[0]; | |
507 | port->size = tmp[2]; | |
508 | port->align = 0; | |
509 | port->flags = PNP_PORT_FLAG_FIXED; | |
9dd78466 | 510 | pnp_register_port_resource(option, port); |
1da177e4 LT |
511 | } |
512 | ||
513 | /* | |
514 | * Add memory resource to resources list. | |
515 | */ | |
1da177e4 | 516 | static void __init isapnp_parse_mem_resource(struct pnp_option *option, |
9dd78466 | 517 | int size) |
1da177e4 LT |
518 | { |
519 | unsigned char tmp[9]; | |
520 | struct pnp_mem *mem; | |
521 | ||
522 | isapnp_peek(tmp, size); | |
cd861280 | 523 | mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL); |
1da177e4 LT |
524 | if (!mem) |
525 | return; | |
526 | mem->min = ((tmp[2] << 8) | tmp[1]) << 8; | |
527 | mem->max = ((tmp[4] << 8) | tmp[3]) << 8; | |
528 | mem->align = (tmp[6] << 8) | tmp[5]; | |
529 | mem->size = ((tmp[8] << 8) | tmp[7]) << 8; | |
530 | mem->flags = tmp[0]; | |
9dd78466 | 531 | pnp_register_mem_resource(option, mem); |
1da177e4 LT |
532 | } |
533 | ||
534 | /* | |
535 | * Add 32-bit memory resource to resources list. | |
536 | */ | |
1da177e4 | 537 | static void __init isapnp_parse_mem32_resource(struct pnp_option *option, |
9dd78466 | 538 | int size) |
1da177e4 LT |
539 | { |
540 | unsigned char tmp[17]; | |
541 | struct pnp_mem *mem; | |
542 | ||
543 | isapnp_peek(tmp, size); | |
cd861280 | 544 | mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL); |
1da177e4 LT |
545 | if (!mem) |
546 | return; | |
547 | mem->min = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1]; | |
548 | mem->max = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5]; | |
9dd78466 BH |
549 | mem->align = |
550 | (tmp[12] << 24) | (tmp[11] << 16) | (tmp[10] << 8) | tmp[9]; | |
551 | mem->size = | |
552 | (tmp[16] << 24) | (tmp[15] << 16) | (tmp[14] << 8) | tmp[13]; | |
1da177e4 | 553 | mem->flags = tmp[0]; |
9dd78466 | 554 | pnp_register_mem_resource(option, mem); |
1da177e4 LT |
555 | } |
556 | ||
557 | /* | |
558 | * Add 32-bit fixed memory resource to resources list. | |
559 | */ | |
1da177e4 | 560 | static void __init isapnp_parse_fixed_mem32_resource(struct pnp_option *option, |
9dd78466 | 561 | int size) |
1da177e4 LT |
562 | { |
563 | unsigned char tmp[9]; | |
564 | struct pnp_mem *mem; | |
565 | ||
566 | isapnp_peek(tmp, size); | |
cd861280 | 567 | mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL); |
1da177e4 LT |
568 | if (!mem) |
569 | return; | |
9dd78466 BH |
570 | mem->min = mem->max = |
571 | (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1]; | |
1da177e4 LT |
572 | mem->size = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5]; |
573 | mem->align = 0; | |
574 | mem->flags = tmp[0]; | |
9dd78466 | 575 | pnp_register_mem_resource(option, mem); |
1da177e4 LT |
576 | } |
577 | ||
578 | /* | |
579 | * Parse card name for ISA PnP device. | |
9dd78466 | 580 | */ |
1da177e4 LT |
581 | static void __init |
582 | isapnp_parse_name(char *name, unsigned int name_max, unsigned short *size) | |
583 | { | |
584 | if (name[0] == '\0') { | |
9dd78466 BH |
585 | unsigned short size1 = |
586 | *size >= name_max ? (name_max - 1) : *size; | |
1da177e4 LT |
587 | isapnp_peek(name, size1); |
588 | name[size1] = '\0'; | |
589 | *size -= size1; | |
590 | ||
591 | /* clean whitespace from end of string */ | |
9dd78466 | 592 | while (size1 > 0 && name[--size1] == ' ') |
1da177e4 LT |
593 | name[size1] = '\0'; |
594 | } | |
595 | } | |
596 | ||
597 | /* | |
598 | * Parse resource map for logical device. | |
599 | */ | |
1da177e4 LT |
600 | static int __init isapnp_create_device(struct pnp_card *card, |
601 | unsigned short size) | |
602 | { | |
603 | int number = 0, skip = 0, priority = 0, compat = 0; | |
604 | unsigned char type, tmp[17]; | |
605 | struct pnp_option *option; | |
606 | struct pnp_dev *dev; | |
07d4e9af | 607 | |
1da177e4 LT |
608 | if ((dev = isapnp_parse_device(card, size, number++)) == NULL) |
609 | return 1; | |
610 | option = pnp_register_independent_option(dev); | |
611 | if (!option) { | |
612 | kfree(dev); | |
613 | return 1; | |
614 | } | |
9dd78466 | 615 | pnp_add_card_device(card, dev); |
1da177e4 LT |
616 | |
617 | while (1) { | |
9dd78466 | 618 | if (isapnp_read_tag(&type, &size) < 0) |
1da177e4 LT |
619 | return 1; |
620 | if (skip && type != _STAG_LOGDEVID && type != _STAG_END) | |
621 | goto __skip; | |
622 | switch (type) { | |
623 | case _STAG_LOGDEVID: | |
624 | if (size >= 5 && size <= 6) { | |
9dd78466 BH |
625 | if ((dev = |
626 | isapnp_parse_device(card, size, | |
627 | number++)) == NULL) | |
1da177e4 LT |
628 | return 1; |
629 | size = 0; | |
630 | skip = 0; | |
631 | option = pnp_register_independent_option(dev); | |
656bde57 JJ |
632 | if (!option) { |
633 | kfree(dev); | |
1da177e4 | 634 | return 1; |
656bde57 | 635 | } |
9dd78466 | 636 | pnp_add_card_device(card, dev); |
1da177e4 LT |
637 | } else { |
638 | skip = 1; | |
639 | } | |
640 | priority = 0; | |
641 | compat = 0; | |
642 | break; | |
643 | case _STAG_COMPATDEVID: | |
644 | if (size == 4 && compat < DEVICE_COUNT_COMPATIBLE) { | |
645 | isapnp_peek(tmp, 4); | |
9dd78466 BH |
646 | isapnp_parse_id(dev, (tmp[1] << 8) | tmp[0], |
647 | (tmp[3] << 8) | tmp[2]); | |
1da177e4 LT |
648 | compat++; |
649 | size = 0; | |
650 | } | |
651 | break; | |
652 | case _STAG_IRQ: | |
653 | if (size < 2 || size > 3) | |
654 | goto __skip; | |
655 | isapnp_parse_irq_resource(option, size); | |
656 | size = 0; | |
657 | break; | |
658 | case _STAG_DMA: | |
659 | if (size != 2) | |
660 | goto __skip; | |
661 | isapnp_parse_dma_resource(option, size); | |
662 | size = 0; | |
663 | break; | |
664 | case _STAG_STARTDEP: | |
665 | if (size > 1) | |
666 | goto __skip; | |
667 | priority = 0x100 | PNP_RES_PRIORITY_ACCEPTABLE; | |
668 | if (size > 0) { | |
669 | isapnp_peek(tmp, size); | |
670 | priority = 0x100 | tmp[0]; | |
671 | size = 0; | |
672 | } | |
9dd78466 | 673 | option = pnp_register_dependent_option(dev, priority); |
1da177e4 LT |
674 | if (!option) |
675 | return 1; | |
676 | break; | |
677 | case _STAG_ENDDEP: | |
678 | if (size != 0) | |
679 | goto __skip; | |
680 | priority = 0; | |
681 | break; | |
682 | case _STAG_IOPORT: | |
683 | if (size != 7) | |
684 | goto __skip; | |
685 | isapnp_parse_port_resource(option, size); | |
686 | size = 0; | |
687 | break; | |
688 | case _STAG_FIXEDIO: | |
689 | if (size != 3) | |
690 | goto __skip; | |
691 | isapnp_parse_fixed_port_resource(option, size); | |
692 | size = 0; | |
693 | break; | |
694 | case _STAG_VENDOR: | |
695 | break; | |
696 | case _LTAG_MEMRANGE: | |
697 | if (size != 9) | |
698 | goto __skip; | |
699 | isapnp_parse_mem_resource(option, size); | |
700 | size = 0; | |
701 | break; | |
702 | case _LTAG_ANSISTR: | |
703 | isapnp_parse_name(dev->name, sizeof(dev->name), &size); | |
704 | break; | |
705 | case _LTAG_UNICODESTR: | |
706 | /* silently ignore */ | |
707 | /* who use unicode for hardware identification? */ | |
708 | break; | |
709 | case _LTAG_VENDOR: | |
710 | break; | |
711 | case _LTAG_MEM32RANGE: | |
712 | if (size != 17) | |
713 | goto __skip; | |
714 | isapnp_parse_mem32_resource(option, size); | |
715 | size = 0; | |
716 | break; | |
717 | case _LTAG_FIXEDMEM32RANGE: | |
718 | if (size != 9) | |
719 | goto __skip; | |
720 | isapnp_parse_fixed_mem32_resource(option, size); | |
721 | size = 0; | |
722 | break; | |
723 | case _STAG_END: | |
724 | if (size > 0) | |
725 | isapnp_skip_bytes(size); | |
726 | return 1; | |
727 | default: | |
9dd78466 BH |
728 | printk(KERN_ERR |
729 | "isapnp: unexpected or unknown tag type 0x%x for logical device %i (device %i), ignored\n", | |
730 | type, dev->number, card->number); | |
1da177e4 | 731 | } |
1e0aa9ad | 732 | __skip: |
9dd78466 BH |
733 | if (size > 0) |
734 | isapnp_skip_bytes(size); | |
1da177e4 LT |
735 | } |
736 | return 0; | |
737 | } | |
738 | ||
739 | /* | |
740 | * Parse resource map for ISA PnP card. | |
741 | */ | |
1da177e4 LT |
742 | static void __init isapnp_parse_resource_map(struct pnp_card *card) |
743 | { | |
744 | unsigned char type, tmp[17]; | |
745 | unsigned short size; | |
746 | ||
747 | while (1) { | |
9dd78466 | 748 | if (isapnp_read_tag(&type, &size) < 0) |
1da177e4 LT |
749 | return; |
750 | switch (type) { | |
751 | case _STAG_PNPVERNO: | |
752 | if (size != 2) | |
753 | goto __skip; | |
754 | isapnp_peek(tmp, 2); | |
755 | card->pnpver = tmp[0]; | |
756 | card->productver = tmp[1]; | |
757 | size = 0; | |
758 | break; | |
759 | case _STAG_LOGDEVID: | |
760 | if (size >= 5 && size <= 6) { | |
9dd78466 | 761 | if (isapnp_create_device(card, size) == 1) |
1da177e4 LT |
762 | return; |
763 | size = 0; | |
764 | } | |
765 | break; | |
766 | case _STAG_VENDOR: | |
767 | break; | |
768 | case _LTAG_ANSISTR: | |
9dd78466 BH |
769 | isapnp_parse_name(card->name, sizeof(card->name), |
770 | &size); | |
1da177e4 LT |
771 | break; |
772 | case _LTAG_UNICODESTR: | |
773 | /* silently ignore */ | |
774 | /* who use unicode for hardware identification? */ | |
775 | break; | |
776 | case _LTAG_VENDOR: | |
777 | break; | |
778 | case _STAG_END: | |
779 | if (size > 0) | |
780 | isapnp_skip_bytes(size); | |
781 | return; | |
782 | default: | |
9dd78466 BH |
783 | printk(KERN_ERR |
784 | "isapnp: unexpected or unknown tag type 0x%x for device %i, ignored\n", | |
785 | type, card->number); | |
1da177e4 | 786 | } |
1e0aa9ad | 787 | __skip: |
9dd78466 BH |
788 | if (size > 0) |
789 | isapnp_skip_bytes(size); | |
1da177e4 LT |
790 | } |
791 | } | |
792 | ||
793 | /* | |
794 | * Compute ISA PnP checksum for first eight bytes. | |
795 | */ | |
1da177e4 LT |
796 | static unsigned char __init isapnp_checksum(unsigned char *data) |
797 | { | |
798 | int i, j; | |
799 | unsigned char checksum = 0x6a, bit, b; | |
800 | ||
801 | for (i = 0; i < 8; i++) { | |
802 | b = data[i]; | |
803 | for (j = 0; j < 8; j++) { | |
804 | bit = 0; | |
805 | if (b & (1 << j)) | |
806 | bit = 1; | |
9dd78466 BH |
807 | checksum = |
808 | ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) | |
809 | | (checksum >> 1); | |
1da177e4 LT |
810 | } |
811 | } | |
812 | return checksum; | |
813 | } | |
814 | ||
815 | /* | |
816 | * Parse EISA id for ISA PnP card. | |
817 | */ | |
9dd78466 BH |
818 | static void isapnp_parse_card_id(struct pnp_card *card, unsigned short vendor, |
819 | unsigned short device) | |
1da177e4 | 820 | { |
9dd78466 | 821 | struct pnp_id *id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL); |
07d4e9af | 822 | |
1da177e4 LT |
823 | if (!id) |
824 | return; | |
825 | sprintf(id->id, "%c%c%c%x%x%x%x", | |
9dd78466 BH |
826 | 'A' + ((vendor >> 2) & 0x3f) - 1, |
827 | 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1, | |
828 | 'A' + ((vendor >> 8) & 0x1f) - 1, | |
829 | (device >> 4) & 0x0f, | |
830 | device & 0x0f, (device >> 12) & 0x0f, (device >> 8) & 0x0f); | |
831 | pnp_add_card_id(id, card); | |
1da177e4 LT |
832 | } |
833 | ||
834 | /* | |
835 | * Build device list for all present ISA PnP devices. | |
836 | */ | |
1da177e4 LT |
837 | static int __init isapnp_build_device_list(void) |
838 | { | |
839 | int csn; | |
840 | unsigned char header[9], checksum; | |
841 | struct pnp_card *card; | |
842 | ||
843 | isapnp_wait(); | |
844 | isapnp_key(); | |
845 | for (csn = 1; csn <= isapnp_csn_count; csn++) { | |
846 | isapnp_wake(csn); | |
847 | isapnp_peek(header, 9); | |
848 | checksum = isapnp_checksum(header); | |
849 | #if 0 | |
9dd78466 BH |
850 | printk(KERN_DEBUG |
851 | "vendor: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n", | |
852 | header[0], header[1], header[2], header[3], header[4], | |
853 | header[5], header[6], header[7], header[8]); | |
1da177e4 LT |
854 | printk(KERN_DEBUG "checksum = 0x%x\n", checksum); |
855 | #endif | |
9dd78466 BH |
856 | if ((card = |
857 | kzalloc(sizeof(struct pnp_card), GFP_KERNEL)) == NULL) | |
1da177e4 LT |
858 | continue; |
859 | ||
860 | card->number = csn; | |
861 | INIT_LIST_HEAD(&card->devices); | |
9dd78466 BH |
862 | isapnp_parse_card_id(card, (header[1] << 8) | header[0], |
863 | (header[3] << 8) | header[2]); | |
864 | card->serial = | |
865 | (header[7] << 24) | (header[6] << 16) | (header[5] << 8) | | |
866 | header[4]; | |
1da177e4 LT |
867 | isapnp_checksum_value = 0x00; |
868 | isapnp_parse_resource_map(card); | |
869 | if (isapnp_checksum_value != 0x00) | |
9dd78466 BH |
870 | printk(KERN_ERR |
871 | "isapnp: checksum for device %i is not valid (0x%x)\n", | |
872 | csn, isapnp_checksum_value); | |
1da177e4 LT |
873 | card->checksum = isapnp_checksum_value; |
874 | card->protocol = &isapnp_protocol; | |
875 | ||
876 | pnp_add_card(card); | |
877 | } | |
878 | isapnp_wait(); | |
879 | return 0; | |
880 | } | |
881 | ||
882 | /* | |
883 | * Basic configuration routines. | |
884 | */ | |
885 | ||
886 | int isapnp_present(void) | |
887 | { | |
888 | struct pnp_card *card; | |
07d4e9af | 889 | |
1da177e4 LT |
890 | pnp_for_each_card(card) { |
891 | if (card->protocol == &isapnp_protocol) | |
892 | return 1; | |
893 | } | |
894 | return 0; | |
895 | } | |
896 | ||
897 | int isapnp_cfg_begin(int csn, int logdev) | |
898 | { | |
899 | if (csn < 1 || csn > isapnp_csn_count || logdev > 10) | |
900 | return -EINVAL; | |
14cc3e2b | 901 | mutex_lock(&isapnp_cfg_mutex); |
1da177e4 LT |
902 | isapnp_wait(); |
903 | isapnp_key(); | |
904 | isapnp_wake(csn); | |
905 | #if 0 | |
906 | /* to avoid malfunction when the isapnptools package is used */ | |
907 | /* we must set RDP to our value again */ | |
908 | /* it is possible to set RDP only in the isolation phase */ | |
909 | /* Jens Thoms Toerring <Jens.Toerring@physik.fu-berlin.de> */ | |
910 | isapnp_write_byte(0x02, 0x04); /* clear CSN of card */ | |
9dd78466 BH |
911 | mdelay(2); /* is this necessary? */ |
912 | isapnp_wake(csn); /* bring card into sleep state */ | |
913 | isapnp_wake(0); /* bring card into isolation state */ | |
914 | isapnp_set_rdp(); /* reset the RDP port */ | |
915 | udelay(1000); /* delay 1000us */ | |
1da177e4 | 916 | isapnp_write_byte(0x06, csn); /* reset CSN to previous value */ |
9dd78466 | 917 | udelay(250); /* is this necessary? */ |
1da177e4 LT |
918 | #endif |
919 | if (logdev >= 0) | |
920 | isapnp_device(logdev); | |
921 | return 0; | |
922 | } | |
923 | ||
924 | int isapnp_cfg_end(void) | |
925 | { | |
926 | isapnp_wait(); | |
14cc3e2b | 927 | mutex_unlock(&isapnp_cfg_mutex); |
1da177e4 LT |
928 | return 0; |
929 | } | |
930 | ||
1da177e4 | 931 | /* |
07d4e9af | 932 | * Initialization. |
1da177e4 LT |
933 | */ |
934 | ||
1da177e4 LT |
935 | EXPORT_SYMBOL(isapnp_protocol); |
936 | EXPORT_SYMBOL(isapnp_present); | |
937 | EXPORT_SYMBOL(isapnp_cfg_begin); | |
938 | EXPORT_SYMBOL(isapnp_cfg_end); | |
1da177e4 LT |
939 | EXPORT_SYMBOL(isapnp_write_byte); |
940 | ||
9dd78466 BH |
941 | static int isapnp_read_resources(struct pnp_dev *dev, |
942 | struct pnp_resource_table *res) | |
1da177e4 LT |
943 | { |
944 | int tmp, ret; | |
945 | ||
946 | dev->active = isapnp_read_byte(ISAPNP_CFG_ACTIVATE); | |
947 | if (dev->active) { | |
948 | for (tmp = 0; tmp < PNP_MAX_PORT; tmp++) { | |
949 | ret = isapnp_read_word(ISAPNP_CFG_PORT + (tmp << 1)); | |
950 | if (!ret) | |
951 | continue; | |
952 | res->port_resource[tmp].start = ret; | |
953 | res->port_resource[tmp].flags = IORESOURCE_IO; | |
954 | } | |
955 | for (tmp = 0; tmp < PNP_MAX_MEM; tmp++) { | |
9dd78466 BH |
956 | ret = |
957 | isapnp_read_word(ISAPNP_CFG_MEM + (tmp << 3)) << 8; | |
1da177e4 LT |
958 | if (!ret) |
959 | continue; | |
960 | res->mem_resource[tmp].start = ret; | |
961 | res->mem_resource[tmp].flags = IORESOURCE_MEM; | |
962 | } | |
963 | for (tmp = 0; tmp < PNP_MAX_IRQ; tmp++) { | |
9dd78466 BH |
964 | ret = |
965 | (isapnp_read_word(ISAPNP_CFG_IRQ + (tmp << 1)) >> | |
966 | 8); | |
1da177e4 LT |
967 | if (!ret) |
968 | continue; | |
9dd78466 BH |
969 | res->irq_resource[tmp].start = |
970 | res->irq_resource[tmp].end = ret; | |
1da177e4 LT |
971 | res->irq_resource[tmp].flags = IORESOURCE_IRQ; |
972 | } | |
973 | for (tmp = 0; tmp < PNP_MAX_DMA; tmp++) { | |
974 | ret = isapnp_read_byte(ISAPNP_CFG_DMA + tmp); | |
975 | if (ret == 4) | |
976 | continue; | |
9dd78466 BH |
977 | res->dma_resource[tmp].start = |
978 | res->dma_resource[tmp].end = ret; | |
1da177e4 LT |
979 | res->dma_resource[tmp].flags = IORESOURCE_DMA; |
980 | } | |
981 | } | |
982 | return 0; | |
983 | } | |
984 | ||
9dd78466 BH |
985 | static int isapnp_get_resources(struct pnp_dev *dev, |
986 | struct pnp_resource_table *res) | |
1da177e4 LT |
987 | { |
988 | int ret; | |
1e0aa9ad | 989 | |
1da177e4 LT |
990 | pnp_init_resource_table(res); |
991 | isapnp_cfg_begin(dev->card->number, dev->number); | |
992 | ret = isapnp_read_resources(dev, res); | |
993 | isapnp_cfg_end(); | |
994 | return ret; | |
995 | } | |
996 | ||
9dd78466 BH |
997 | static int isapnp_set_resources(struct pnp_dev *dev, |
998 | struct pnp_resource_table *res) | |
1da177e4 LT |
999 | { |
1000 | int tmp; | |
1001 | ||
1002 | isapnp_cfg_begin(dev->card->number, dev->number); | |
1003 | dev->active = 1; | |
9dd78466 BH |
1004 | for (tmp = 0; |
1005 | tmp < PNP_MAX_PORT | |
1006 | && (res->port_resource[tmp]. | |
1007 | flags & (IORESOURCE_IO | IORESOURCE_UNSET)) == IORESOURCE_IO; | |
1008 | tmp++) | |
1009 | isapnp_write_word(ISAPNP_CFG_PORT + (tmp << 1), | |
1010 | res->port_resource[tmp].start); | |
1011 | for (tmp = 0; | |
1012 | tmp < PNP_MAX_IRQ | |
1013 | && (res->irq_resource[tmp]. | |
1014 | flags & (IORESOURCE_IRQ | IORESOURCE_UNSET)) == IORESOURCE_IRQ; | |
1015 | tmp++) { | |
1da177e4 LT |
1016 | int irq = res->irq_resource[tmp].start; |
1017 | if (irq == 2) | |
1018 | irq = 9; | |
9dd78466 | 1019 | isapnp_write_byte(ISAPNP_CFG_IRQ + (tmp << 1), irq); |
1da177e4 | 1020 | } |
9dd78466 BH |
1021 | for (tmp = 0; |
1022 | tmp < PNP_MAX_DMA | |
1023 | && (res->dma_resource[tmp]. | |
1024 | flags & (IORESOURCE_DMA | IORESOURCE_UNSET)) == IORESOURCE_DMA; | |
1025 | tmp++) | |
1026 | isapnp_write_byte(ISAPNP_CFG_DMA + tmp, | |
1027 | res->dma_resource[tmp].start); | |
1028 | for (tmp = 0; | |
1029 | tmp < PNP_MAX_MEM | |
1030 | && (res->mem_resource[tmp]. | |
1031 | flags & (IORESOURCE_MEM | IORESOURCE_UNSET)) == IORESOURCE_MEM; | |
1032 | tmp++) | |
1033 | isapnp_write_word(ISAPNP_CFG_MEM + (tmp << 3), | |
1034 | (res->mem_resource[tmp].start >> 8) & 0xffff); | |
1da177e4 LT |
1035 | /* FIXME: We aren't handling 32bit mems properly here */ |
1036 | isapnp_activate(dev->number); | |
1037 | isapnp_cfg_end(); | |
1038 | return 0; | |
1039 | } | |
1040 | ||
1041 | static int isapnp_disable_resources(struct pnp_dev *dev) | |
1042 | { | |
b1734913 | 1043 | if (!dev->active) |
1da177e4 LT |
1044 | return -EINVAL; |
1045 | isapnp_cfg_begin(dev->card->number, dev->number); | |
1046 | isapnp_deactivate(dev->number); | |
1047 | dev->active = 0; | |
1048 | isapnp_cfg_end(); | |
1049 | return 0; | |
1050 | } | |
1051 | ||
1052 | struct pnp_protocol isapnp_protocol = { | |
9dd78466 BH |
1053 | .name = "ISA Plug and Play", |
1054 | .get = isapnp_get_resources, | |
1055 | .set = isapnp_set_resources, | |
1da177e4 LT |
1056 | .disable = isapnp_disable_resources, |
1057 | }; | |
1058 | ||
1059 | static int __init isapnp_init(void) | |
1060 | { | |
1061 | int cards; | |
1062 | struct pnp_card *card; | |
1063 | struct pnp_dev *dev; | |
1064 | ||
1065 | if (isapnp_disable) { | |
1da177e4 LT |
1066 | printk(KERN_INFO "isapnp: ISA Plug & Play support disabled\n"); |
1067 | return 0; | |
1068 | } | |
07bd1c4a DW |
1069 | #ifdef CONFIG_PPC_MERGE |
1070 | if (check_legacy_ioport(_PIDXR) || check_legacy_ioport(_PNPWRP)) | |
1071 | return -EINVAL; | |
1072 | #endif | |
1da177e4 LT |
1073 | #ifdef ISAPNP_REGION_OK |
1074 | if (!request_region(_PIDXR, 1, "isapnp index")) { | |
9dd78466 BH |
1075 | printk(KERN_ERR "isapnp: Index Register 0x%x already used\n", |
1076 | _PIDXR); | |
1da177e4 LT |
1077 | return -EBUSY; |
1078 | } | |
1079 | #endif | |
1080 | if (!request_region(_PNPWRP, 1, "isapnp write")) { | |
9dd78466 BH |
1081 | printk(KERN_ERR |
1082 | "isapnp: Write Data Register 0x%x already used\n", | |
1083 | _PNPWRP); | |
1da177e4 LT |
1084 | #ifdef ISAPNP_REGION_OK |
1085 | release_region(_PIDXR, 1); | |
1086 | #endif | |
1087 | return -EBUSY; | |
1088 | } | |
1089 | ||
9dd78466 | 1090 | if (pnp_register_protocol(&isapnp_protocol) < 0) |
1da177e4 LT |
1091 | return -EBUSY; |
1092 | ||
1093 | /* | |
9dd78466 BH |
1094 | * Print a message. The existing ISAPnP code is hanging machines |
1095 | * so let the user know where. | |
1da177e4 | 1096 | */ |
9dd78466 | 1097 | |
1da177e4 LT |
1098 | printk(KERN_INFO "isapnp: Scanning for PnP cards...\n"); |
1099 | if (isapnp_rdp >= 0x203 && isapnp_rdp <= 0x3ff) { | |
1100 | isapnp_rdp |= 3; | |
1101 | if (!request_region(isapnp_rdp, 1, "isapnp read")) { | |
9dd78466 BH |
1102 | printk(KERN_ERR |
1103 | "isapnp: Read Data Register 0x%x already used\n", | |
1104 | isapnp_rdp); | |
1da177e4 LT |
1105 | #ifdef ISAPNP_REGION_OK |
1106 | release_region(_PIDXR, 1); | |
1107 | #endif | |
1108 | release_region(_PNPWRP, 1); | |
1109 | return -EBUSY; | |
1110 | } | |
1111 | isapnp_set_rdp(); | |
1112 | } | |
1da177e4 LT |
1113 | if (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff) { |
1114 | cards = isapnp_isolate(); | |
9dd78466 | 1115 | if (cards < 0 || (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff)) { |
1da177e4 LT |
1116 | #ifdef ISAPNP_REGION_OK |
1117 | release_region(_PIDXR, 1); | |
1118 | #endif | |
1119 | release_region(_PNPWRP, 1); | |
9dd78466 BH |
1120 | printk(KERN_INFO |
1121 | "isapnp: No Plug & Play device found\n"); | |
1da177e4 LT |
1122 | return 0; |
1123 | } | |
1124 | request_region(isapnp_rdp, 1, "isapnp read"); | |
1125 | } | |
1126 | isapnp_build_device_list(); | |
1127 | cards = 0; | |
1128 | ||
9dd78466 | 1129 | protocol_for_each_card(&isapnp_protocol, card) { |
1da177e4 LT |
1130 | cards++; |
1131 | if (isapnp_verbose) { | |
9dd78466 BH |
1132 | printk(KERN_INFO "isapnp: Card '%s'\n", |
1133 | card->name[0] ? card->name : "Unknown"); | |
1da177e4 LT |
1134 | if (isapnp_verbose < 2) |
1135 | continue; | |
9dd78466 BH |
1136 | card_for_each_dev(card, dev) { |
1137 | printk(KERN_INFO "isapnp: Device '%s'\n", | |
1138 | dev->name[0] ? dev->name : "Unknown"); | |
1da177e4 LT |
1139 | } |
1140 | } | |
1141 | } | |
1e0aa9ad | 1142 | if (cards) |
9dd78466 BH |
1143 | printk(KERN_INFO |
1144 | "isapnp: %i Plug & Play card%s detected total\n", cards, | |
1145 | cards > 1 ? "s" : ""); | |
1e0aa9ad | 1146 | else |
1da177e4 | 1147 | printk(KERN_INFO "isapnp: No Plug & Play card found\n"); |
1da177e4 LT |
1148 | |
1149 | isapnp_proc_init(); | |
1150 | return 0; | |
1151 | } | |
1152 | ||
1153 | device_initcall(isapnp_init); | |
1154 | ||
1155 | /* format is: noisapnp */ | |
1156 | ||
1157 | static int __init isapnp_setup_disable(char *str) | |
1158 | { | |
1159 | isapnp_disable = 1; | |
1160 | return 1; | |
1161 | } | |
1162 | ||
1163 | __setup("noisapnp", isapnp_setup_disable); | |
1164 | ||
1165 | /* format is: isapnp=rdp,reset,skip_pci_scan,verbose */ | |
1166 | ||
1167 | static int __init isapnp_setup_isapnp(char *str) | |
1168 | { | |
9dd78466 BH |
1169 | (void)((get_option(&str, &isapnp_rdp) == 2) && |
1170 | (get_option(&str, &isapnp_reset) == 2) && | |
1171 | (get_option(&str, &isapnp_verbose) == 2)); | |
1da177e4 LT |
1172 | return 1; |
1173 | } | |
1174 | ||
1175 | __setup("isapnp=", isapnp_setup_isapnp); |