1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * rsparser.c - parses and encodes pnpbios resource data streams |
4 | */ |
5 | |
6 | #include <linux/ctype.h> |
7 | #include <linux/pnp.h> |
8 | #include <linux/string.h> |
9 | |
10 | #ifdef CONFIG_PCI |
11 | #include <linux/pci.h> |
12 | #else |
13 | inline void pcibios_penalize_isa_irq(int irq, int active) |
14 | { |
15 | } |
16 | #endif /* CONFIG_PCI */ |
17 | |
18 | #include "../base.h" |
19 | #include "pnpbios.h" |
20 | |
21 | /* standard resource tags */ |
22 | #define SMALL_TAG_PNPVERNO 0x01 |
23 | #define SMALL_TAG_LOGDEVID 0x02 |
24 | #define SMALL_TAG_COMPATDEVID 0x03 |
25 | #define SMALL_TAG_IRQ 0x04 |
26 | #define SMALL_TAG_DMA 0x05 |
27 | #define SMALL_TAG_STARTDEP 0x06 |
28 | #define SMALL_TAG_ENDDEP 0x07 |
29 | #define SMALL_TAG_PORT 0x08 |
30 | #define SMALL_TAG_FIXEDPORT 0x09 |
31 | #define SMALL_TAG_VENDOR 0x0e |
32 | #define SMALL_TAG_END 0x0f |
33 | #define LARGE_TAG 0x80 |
34 | #define LARGE_TAG_MEM 0x81 |
35 | #define LARGE_TAG_ANSISTR 0x82 |
36 | #define LARGE_TAG_UNICODESTR 0x83 |
37 | #define LARGE_TAG_VENDOR 0x84 |
38 | #define LARGE_TAG_MEM32 0x85 |
39 | #define LARGE_TAG_FIXEDMEM32 0x86 |
40 | |
41 | /* |
42 | * Resource Data Stream Format: |
43 | * |
44 | * Allocated Resources (required) |
45 | * end tag -> |
46 | * Resource Configuration Options (optional) |
47 | * end tag -> |
48 | * Compitable Device IDs (optional) |
49 | * final end tag -> |
50 | */ |
51 | |
52 | /* |
53 | * Allocated Resources |
54 | */ |
55 | |
56 | static void pnpbios_parse_allocated_ioresource(struct pnp_dev *dev, |
57 | int start, int len) |
58 | { |
59 | int flags = 0; |
60 | int end = start + len - 1; |
61 | |
62 | if (len <= 0 || end >= 0x10003) |
63 | flags |= IORESOURCE_DISABLED; |
64 | |
65 | pnp_add_io_resource(dev, start, end, flags); |
66 | } |
67 | |
68 | static void pnpbios_parse_allocated_memresource(struct pnp_dev *dev, |
69 | int start, int len) |
70 | { |
71 | int flags = 0; |
72 | int end = start + len - 1; |
73 | |
74 | if (len <= 0) |
75 | flags |= IORESOURCE_DISABLED; |
76 | |
77 | pnp_add_mem_resource(dev, start, end, flags); |
78 | } |
79 | |
80 | static unsigned char *pnpbios_parse_allocated_resource_data(struct pnp_dev *dev, |
81 | unsigned char *p, |
82 | unsigned char *end) |
83 | { |
84 | unsigned int len, tag; |
85 | int io, size, mask, i, flags; |
86 | |
87 | if (!p) |
88 | return NULL; |
89 | |
90 | pnp_dbg(&dev->dev, "parse allocated resources\n" ); |
91 | |
92 | pnp_init_resources(dev); |
93 | |
94 | while ((char *)p < (char *)end) { |
95 | |
96 | /* determine the type of tag */ |
97 | if (p[0] & LARGE_TAG) { /* large tag */ |
98 | len = (p[2] << 8) | p[1]; |
99 | tag = p[0]; |
100 | } else { /* small tag */ |
101 | len = p[0] & 0x07; |
102 | tag = ((p[0] >> 3) & 0x0f); |
103 | } |
104 | |
105 | switch (tag) { |
106 | |
107 | case LARGE_TAG_MEM: |
108 | if (len != 9) |
109 | goto len_err; |
110 | io = *(short *)&p[4]; |
111 | size = *(short *)&p[10]; |
112 | pnpbios_parse_allocated_memresource(dev, start: io, len: size); |
113 | break; |
114 | |
115 | case LARGE_TAG_ANSISTR: |
116 | /* ignore this for now */ |
117 | break; |
118 | |
119 | case LARGE_TAG_VENDOR: |
120 | /* do nothing */ |
121 | break; |
122 | |
123 | case LARGE_TAG_MEM32: |
124 | if (len != 17) |
125 | goto len_err; |
126 | io = *(int *)&p[4]; |
127 | size = *(int *)&p[16]; |
128 | pnpbios_parse_allocated_memresource(dev, start: io, len: size); |
129 | break; |
130 | |
131 | case LARGE_TAG_FIXEDMEM32: |
132 | if (len != 9) |
133 | goto len_err; |
134 | io = *(int *)&p[4]; |
135 | size = *(int *)&p[8]; |
136 | pnpbios_parse_allocated_memresource(dev, start: io, len: size); |
137 | break; |
138 | |
139 | case SMALL_TAG_IRQ: |
140 | if (len < 2 || len > 3) |
141 | goto len_err; |
142 | flags = 0; |
143 | io = -1; |
144 | mask = p[1] + p[2] * 256; |
145 | for (i = 0; i < 16; i++, mask = mask >> 1) |
146 | if (mask & 0x01) |
147 | io = i; |
148 | if (io != -1) |
149 | pcibios_penalize_isa_irq(irq: io, active: 1); |
150 | else |
151 | flags = IORESOURCE_DISABLED; |
152 | pnp_add_irq_resource(dev, irq: io, flags); |
153 | break; |
154 | |
155 | case SMALL_TAG_DMA: |
156 | if (len != 2) |
157 | goto len_err; |
158 | flags = 0; |
159 | io = -1; |
160 | mask = p[1]; |
161 | for (i = 0; i < 8; i++, mask = mask >> 1) |
162 | if (mask & 0x01) |
163 | io = i; |
164 | if (io == -1) |
165 | flags = IORESOURCE_DISABLED; |
166 | pnp_add_dma_resource(dev, dma: io, flags); |
167 | break; |
168 | |
169 | case SMALL_TAG_PORT: |
170 | if (len != 7) |
171 | goto len_err; |
172 | io = p[2] + p[3] * 256; |
173 | size = p[7]; |
174 | pnpbios_parse_allocated_ioresource(dev, start: io, len: size); |
175 | break; |
176 | |
177 | case SMALL_TAG_VENDOR: |
178 | /* do nothing */ |
179 | break; |
180 | |
181 | case SMALL_TAG_FIXEDPORT: |
182 | if (len != 3) |
183 | goto len_err; |
184 | io = p[1] + p[2] * 256; |
185 | size = p[3]; |
186 | pnpbios_parse_allocated_ioresource(dev, start: io, len: size); |
187 | break; |
188 | |
189 | case SMALL_TAG_END: |
190 | p = p + 2; |
191 | return (unsigned char *)p; |
192 | break; |
193 | |
194 | default: /* an unknown tag */ |
195 | len_err: |
196 | dev_err(&dev->dev, "unknown tag %#x length %d\n" , |
197 | tag, len); |
198 | break; |
199 | } |
200 | |
201 | /* continue to the next tag */ |
202 | if (p[0] & LARGE_TAG) |
203 | p += len + 3; |
204 | else |
205 | p += len + 1; |
206 | } |
207 | |
208 | dev_err(&dev->dev, "no end tag in resource structure\n" ); |
209 | |
210 | return NULL; |
211 | } |
212 | |
213 | /* |
214 | * Resource Configuration Options |
215 | */ |
216 | |
217 | static __init void pnpbios_parse_mem_option(struct pnp_dev *dev, |
218 | unsigned char *p, int size, |
219 | unsigned int option_flags) |
220 | { |
221 | resource_size_t min, max, align, len; |
222 | unsigned char flags; |
223 | |
224 | min = ((p[5] << 8) | p[4]) << 8; |
225 | max = ((p[7] << 8) | p[6]) << 8; |
226 | align = (p[9] << 8) | p[8]; |
227 | len = ((p[11] << 8) | p[10]) << 8; |
228 | flags = p[3]; |
229 | pnp_register_mem_resource(dev, option_flags, min, max, align, size: len, |
230 | flags); |
231 | } |
232 | |
233 | static __init void pnpbios_parse_mem32_option(struct pnp_dev *dev, |
234 | unsigned char *p, int size, |
235 | unsigned int option_flags) |
236 | { |
237 | resource_size_t min, max, align, len; |
238 | unsigned char flags; |
239 | |
240 | min = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4]; |
241 | max = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8]; |
242 | align = (p[15] << 24) | (p[14] << 16) | (p[13] << 8) | p[12]; |
243 | len = (p[19] << 24) | (p[18] << 16) | (p[17] << 8) | p[16]; |
244 | flags = p[3]; |
245 | pnp_register_mem_resource(dev, option_flags, min, max, align, size: len, |
246 | flags); |
247 | } |
248 | |
249 | static __init void pnpbios_parse_fixed_mem32_option(struct pnp_dev *dev, |
250 | unsigned char *p, int size, |
251 | unsigned int option_flags) |
252 | { |
253 | resource_size_t base, len; |
254 | unsigned char flags; |
255 | |
256 | base = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4]; |
257 | len = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8]; |
258 | flags = p[3]; |
259 | pnp_register_mem_resource(dev, option_flags, min: base, max: base, align: 0, size: len, flags); |
260 | } |
261 | |
262 | static __init void pnpbios_parse_irq_option(struct pnp_dev *dev, |
263 | unsigned char *p, int size, |
264 | unsigned int option_flags) |
265 | { |
266 | unsigned long bits; |
267 | pnp_irq_mask_t map; |
268 | unsigned char flags = IORESOURCE_IRQ_HIGHEDGE; |
269 | |
270 | bits = (p[2] << 8) | p[1]; |
271 | |
272 | bitmap_zero(dst: map.bits, PNP_IRQ_NR); |
273 | bitmap_copy(dst: map.bits, src: &bits, nbits: 16); |
274 | |
275 | if (size > 2) |
276 | flags = p[3]; |
277 | |
278 | pnp_register_irq_resource(dev, option_flags, map: &map, flags); |
279 | } |
280 | |
281 | static __init void pnpbios_parse_dma_option(struct pnp_dev *dev, |
282 | unsigned char *p, int size, |
283 | unsigned int option_flags) |
284 | { |
285 | pnp_register_dma_resource(dev, option_flags, map: p[1], flags: p[2]); |
286 | } |
287 | |
288 | static __init void pnpbios_parse_port_option(struct pnp_dev *dev, |
289 | unsigned char *p, int size, |
290 | unsigned int option_flags) |
291 | { |
292 | resource_size_t min, max, align, len; |
293 | unsigned char flags; |
294 | |
295 | min = (p[3] << 8) | p[2]; |
296 | max = (p[5] << 8) | p[4]; |
297 | align = p[6]; |
298 | len = p[7]; |
299 | flags = p[1] ? IORESOURCE_IO_16BIT_ADDR : 0; |
300 | pnp_register_port_resource(dev, option_flags, min, max, align, size: len, |
301 | flags); |
302 | } |
303 | |
304 | static __init void pnpbios_parse_fixed_port_option(struct pnp_dev *dev, |
305 | unsigned char *p, int size, |
306 | unsigned int option_flags) |
307 | { |
308 | resource_size_t base, len; |
309 | |
310 | base = (p[2] << 8) | p[1]; |
311 | len = p[3]; |
312 | pnp_register_port_resource(dev, option_flags, min: base, max: base, align: 0, size: len, |
313 | IORESOURCE_IO_FIXED); |
314 | } |
315 | |
316 | static __init unsigned char * |
317 | pnpbios_parse_resource_option_data(unsigned char *p, unsigned char *end, |
318 | struct pnp_dev *dev) |
319 | { |
320 | unsigned int len, tag; |
321 | int priority; |
322 | unsigned int option_flags; |
323 | |
324 | if (!p) |
325 | return NULL; |
326 | |
327 | pnp_dbg(&dev->dev, "parse resource options\n" ); |
328 | option_flags = 0; |
329 | while ((char *)p < (char *)end) { |
330 | |
331 | /* determine the type of tag */ |
332 | if (p[0] & LARGE_TAG) { /* large tag */ |
333 | len = (p[2] << 8) | p[1]; |
334 | tag = p[0]; |
335 | } else { /* small tag */ |
336 | len = p[0] & 0x07; |
337 | tag = ((p[0] >> 3) & 0x0f); |
338 | } |
339 | |
340 | switch (tag) { |
341 | |
342 | case LARGE_TAG_MEM: |
343 | if (len != 9) |
344 | goto len_err; |
345 | pnpbios_parse_mem_option(dev, p, size: len, option_flags); |
346 | break; |
347 | |
348 | case LARGE_TAG_MEM32: |
349 | if (len != 17) |
350 | goto len_err; |
351 | pnpbios_parse_mem32_option(dev, p, size: len, option_flags); |
352 | break; |
353 | |
354 | case LARGE_TAG_FIXEDMEM32: |
355 | if (len != 9) |
356 | goto len_err; |
357 | pnpbios_parse_fixed_mem32_option(dev, p, size: len, |
358 | option_flags); |
359 | break; |
360 | |
361 | case SMALL_TAG_IRQ: |
362 | if (len < 2 || len > 3) |
363 | goto len_err; |
364 | pnpbios_parse_irq_option(dev, p, size: len, option_flags); |
365 | break; |
366 | |
367 | case SMALL_TAG_DMA: |
368 | if (len != 2) |
369 | goto len_err; |
370 | pnpbios_parse_dma_option(dev, p, size: len, option_flags); |
371 | break; |
372 | |
373 | case SMALL_TAG_PORT: |
374 | if (len != 7) |
375 | goto len_err; |
376 | pnpbios_parse_port_option(dev, p, size: len, option_flags); |
377 | break; |
378 | |
379 | case SMALL_TAG_VENDOR: |
380 | /* do nothing */ |
381 | break; |
382 | |
383 | case SMALL_TAG_FIXEDPORT: |
384 | if (len != 3) |
385 | goto len_err; |
386 | pnpbios_parse_fixed_port_option(dev, p, size: len, |
387 | option_flags); |
388 | break; |
389 | |
390 | case SMALL_TAG_STARTDEP: |
391 | if (len > 1) |
392 | goto len_err; |
393 | priority = PNP_RES_PRIORITY_ACCEPTABLE; |
394 | if (len > 0) |
395 | priority = p[1]; |
396 | option_flags = pnp_new_dependent_set(dev, priority); |
397 | break; |
398 | |
399 | case SMALL_TAG_ENDDEP: |
400 | if (len != 0) |
401 | goto len_err; |
402 | option_flags = 0; |
403 | break; |
404 | |
405 | case SMALL_TAG_END: |
406 | return p + 2; |
407 | |
408 | default: /* an unknown tag */ |
409 | len_err: |
410 | dev_err(&dev->dev, "unknown tag %#x length %d\n" , |
411 | tag, len); |
412 | break; |
413 | } |
414 | |
415 | /* continue to the next tag */ |
416 | if (p[0] & LARGE_TAG) |
417 | p += len + 3; |
418 | else |
419 | p += len + 1; |
420 | } |
421 | |
422 | dev_err(&dev->dev, "no end tag in resource structure\n" ); |
423 | |
424 | return NULL; |
425 | } |
426 | |
427 | /* |
428 | * Compatible Device IDs |
429 | */ |
430 | |
431 | static unsigned char *pnpbios_parse_compatible_ids(unsigned char *p, |
432 | unsigned char *end, |
433 | struct pnp_dev *dev) |
434 | { |
435 | int len, tag; |
436 | u32 eisa_id; |
437 | char id[8]; |
438 | struct pnp_id *dev_id; |
439 | |
440 | if (!p) |
441 | return NULL; |
442 | |
443 | while ((char *)p < (char *)end) { |
444 | |
445 | /* determine the type of tag */ |
446 | if (p[0] & LARGE_TAG) { /* large tag */ |
447 | len = (p[2] << 8) | p[1]; |
448 | tag = p[0]; |
449 | } else { /* small tag */ |
450 | len = p[0] & 0x07; |
451 | tag = ((p[0] >> 3) & 0x0f); |
452 | } |
453 | |
454 | switch (tag) { |
455 | |
456 | case LARGE_TAG_ANSISTR: |
457 | memcpy(dev->name, p + 3, |
458 | len >= PNP_NAME_LEN ? PNP_NAME_LEN - 2 : len); |
459 | dev->name[len >= |
460 | PNP_NAME_LEN ? PNP_NAME_LEN - 1 : len] = '\0'; |
461 | break; |
462 | |
463 | case SMALL_TAG_COMPATDEVID: /* compatible ID */ |
464 | if (len != 4) |
465 | goto len_err; |
466 | eisa_id = p[1] | p[2] << 8 | p[3] << 16 | p[4] << 24; |
467 | pnp_eisa_id_to_string(id: eisa_id & PNP_EISA_ID_MASK, str: id); |
468 | dev_id = pnp_add_id(dev, id); |
469 | if (!dev_id) |
470 | return NULL; |
471 | break; |
472 | |
473 | case SMALL_TAG_END: |
474 | p = p + 2; |
475 | return (unsigned char *)p; |
476 | break; |
477 | |
478 | default: /* an unknown tag */ |
479 | len_err: |
480 | dev_err(&dev->dev, "unknown tag %#x length %d\n" , |
481 | tag, len); |
482 | break; |
483 | } |
484 | |
485 | /* continue to the next tag */ |
486 | if (p[0] & LARGE_TAG) |
487 | p += len + 3; |
488 | else |
489 | p += len + 1; |
490 | } |
491 | |
492 | dev_err(&dev->dev, "no end tag in resource structure\n" ); |
493 | |
494 | return NULL; |
495 | } |
496 | |
497 | /* |
498 | * Allocated Resource Encoding |
499 | */ |
500 | |
501 | static void pnpbios_encode_mem(struct pnp_dev *dev, unsigned char *p, |
502 | struct resource *res) |
503 | { |
504 | unsigned long base; |
505 | unsigned long len; |
506 | |
507 | if (pnp_resource_enabled(res)) { |
508 | base = res->start; |
509 | len = resource_size(res); |
510 | } else { |
511 | base = 0; |
512 | len = 0; |
513 | } |
514 | |
515 | p[4] = (base >> 8) & 0xff; |
516 | p[5] = ((base >> 8) >> 8) & 0xff; |
517 | p[6] = (base >> 8) & 0xff; |
518 | p[7] = ((base >> 8) >> 8) & 0xff; |
519 | p[10] = (len >> 8) & 0xff; |
520 | p[11] = ((len >> 8) >> 8) & 0xff; |
521 | |
522 | pnp_dbg(&dev->dev, " encode mem %#lx-%#lx\n" , base, base + len - 1); |
523 | } |
524 | |
525 | static void pnpbios_encode_mem32(struct pnp_dev *dev, unsigned char *p, |
526 | struct resource *res) |
527 | { |
528 | unsigned long base; |
529 | unsigned long len; |
530 | |
531 | if (pnp_resource_enabled(res)) { |
532 | base = res->start; |
533 | len = resource_size(res); |
534 | } else { |
535 | base = 0; |
536 | len = 0; |
537 | } |
538 | |
539 | p[4] = base & 0xff; |
540 | p[5] = (base >> 8) & 0xff; |
541 | p[6] = (base >> 16) & 0xff; |
542 | p[7] = (base >> 24) & 0xff; |
543 | p[8] = base & 0xff; |
544 | p[9] = (base >> 8) & 0xff; |
545 | p[10] = (base >> 16) & 0xff; |
546 | p[11] = (base >> 24) & 0xff; |
547 | p[16] = len & 0xff; |
548 | p[17] = (len >> 8) & 0xff; |
549 | p[18] = (len >> 16) & 0xff; |
550 | p[19] = (len >> 24) & 0xff; |
551 | |
552 | pnp_dbg(&dev->dev, " encode mem32 %#lx-%#lx\n" , base, base + len - 1); |
553 | } |
554 | |
555 | static void pnpbios_encode_fixed_mem32(struct pnp_dev *dev, unsigned char *p, |
556 | struct resource *res) |
557 | { |
558 | unsigned long base; |
559 | unsigned long len; |
560 | |
561 | if (pnp_resource_enabled(res)) { |
562 | base = res->start; |
563 | len = resource_size(res); |
564 | } else { |
565 | base = 0; |
566 | len = 0; |
567 | } |
568 | |
569 | p[4] = base & 0xff; |
570 | p[5] = (base >> 8) & 0xff; |
571 | p[6] = (base >> 16) & 0xff; |
572 | p[7] = (base >> 24) & 0xff; |
573 | p[8] = len & 0xff; |
574 | p[9] = (len >> 8) & 0xff; |
575 | p[10] = (len >> 16) & 0xff; |
576 | p[11] = (len >> 24) & 0xff; |
577 | |
578 | pnp_dbg(&dev->dev, " encode fixed_mem32 %#lx-%#lx\n" , base, |
579 | base + len - 1); |
580 | } |
581 | |
582 | static void pnpbios_encode_irq(struct pnp_dev *dev, unsigned char *p, |
583 | struct resource *res) |
584 | { |
585 | unsigned long map; |
586 | |
587 | if (pnp_resource_enabled(res)) |
588 | map = 1 << res->start; |
589 | else |
590 | map = 0; |
591 | |
592 | p[1] = map & 0xff; |
593 | p[2] = (map >> 8) & 0xff; |
594 | |
595 | pnp_dbg(&dev->dev, " encode irq mask %#lx\n" , map); |
596 | } |
597 | |
598 | static void pnpbios_encode_dma(struct pnp_dev *dev, unsigned char *p, |
599 | struct resource *res) |
600 | { |
601 | unsigned long map; |
602 | |
603 | if (pnp_resource_enabled(res)) |
604 | map = 1 << res->start; |
605 | else |
606 | map = 0; |
607 | |
608 | p[1] = map & 0xff; |
609 | |
610 | pnp_dbg(&dev->dev, " encode dma mask %#lx\n" , map); |
611 | } |
612 | |
613 | static void pnpbios_encode_port(struct pnp_dev *dev, unsigned char *p, |
614 | struct resource *res) |
615 | { |
616 | unsigned long base; |
617 | unsigned long len; |
618 | |
619 | if (pnp_resource_enabled(res)) { |
620 | base = res->start; |
621 | len = resource_size(res); |
622 | } else { |
623 | base = 0; |
624 | len = 0; |
625 | } |
626 | |
627 | p[2] = base & 0xff; |
628 | p[3] = (base >> 8) & 0xff; |
629 | p[4] = base & 0xff; |
630 | p[5] = (base >> 8) & 0xff; |
631 | p[7] = len & 0xff; |
632 | |
633 | pnp_dbg(&dev->dev, " encode io %#lx-%#lx\n" , base, base + len - 1); |
634 | } |
635 | |
636 | static void pnpbios_encode_fixed_port(struct pnp_dev *dev, unsigned char *p, |
637 | struct resource *res) |
638 | { |
639 | unsigned long base = res->start; |
640 | unsigned long len = resource_size(res); |
641 | |
642 | if (pnp_resource_enabled(res)) { |
643 | base = res->start; |
644 | len = resource_size(res); |
645 | } else { |
646 | base = 0; |
647 | len = 0; |
648 | } |
649 | |
650 | p[1] = base & 0xff; |
651 | p[2] = (base >> 8) & 0xff; |
652 | p[3] = len & 0xff; |
653 | |
654 | pnp_dbg(&dev->dev, " encode fixed_io %#lx-%#lx\n" , base, |
655 | base + len - 1); |
656 | } |
657 | |
658 | static unsigned char *pnpbios_encode_allocated_resource_data(struct pnp_dev |
659 | *dev, |
660 | unsigned char *p, |
661 | unsigned char *end) |
662 | { |
663 | unsigned int len, tag; |
664 | int port = 0, irq = 0, dma = 0, mem = 0; |
665 | |
666 | if (!p) |
667 | return NULL; |
668 | |
669 | while ((char *)p < (char *)end) { |
670 | |
671 | /* determine the type of tag */ |
672 | if (p[0] & LARGE_TAG) { /* large tag */ |
673 | len = (p[2] << 8) | p[1]; |
674 | tag = p[0]; |
675 | } else { /* small tag */ |
676 | len = p[0] & 0x07; |
677 | tag = ((p[0] >> 3) & 0x0f); |
678 | } |
679 | |
680 | switch (tag) { |
681 | |
682 | case LARGE_TAG_MEM: |
683 | if (len != 9) |
684 | goto len_err; |
685 | pnpbios_encode_mem(dev, p, |
686 | res: pnp_get_resource(dev, IORESOURCE_MEM, num: mem)); |
687 | mem++; |
688 | break; |
689 | |
690 | case LARGE_TAG_MEM32: |
691 | if (len != 17) |
692 | goto len_err; |
693 | pnpbios_encode_mem32(dev, p, |
694 | res: pnp_get_resource(dev, IORESOURCE_MEM, num: mem)); |
695 | mem++; |
696 | break; |
697 | |
698 | case LARGE_TAG_FIXEDMEM32: |
699 | if (len != 9) |
700 | goto len_err; |
701 | pnpbios_encode_fixed_mem32(dev, p, |
702 | res: pnp_get_resource(dev, IORESOURCE_MEM, num: mem)); |
703 | mem++; |
704 | break; |
705 | |
706 | case SMALL_TAG_IRQ: |
707 | if (len < 2 || len > 3) |
708 | goto len_err; |
709 | pnpbios_encode_irq(dev, p, |
710 | res: pnp_get_resource(dev, IORESOURCE_IRQ, num: irq)); |
711 | irq++; |
712 | break; |
713 | |
714 | case SMALL_TAG_DMA: |
715 | if (len != 2) |
716 | goto len_err; |
717 | pnpbios_encode_dma(dev, p, |
718 | res: pnp_get_resource(dev, IORESOURCE_DMA, num: dma)); |
719 | dma++; |
720 | break; |
721 | |
722 | case SMALL_TAG_PORT: |
723 | if (len != 7) |
724 | goto len_err; |
725 | pnpbios_encode_port(dev, p, |
726 | res: pnp_get_resource(dev, IORESOURCE_IO, num: port)); |
727 | port++; |
728 | break; |
729 | |
730 | case SMALL_TAG_VENDOR: |
731 | /* do nothing */ |
732 | break; |
733 | |
734 | case SMALL_TAG_FIXEDPORT: |
735 | if (len != 3) |
736 | goto len_err; |
737 | pnpbios_encode_fixed_port(dev, p, |
738 | res: pnp_get_resource(dev, IORESOURCE_IO, num: port)); |
739 | port++; |
740 | break; |
741 | |
742 | case SMALL_TAG_END: |
743 | p = p + 2; |
744 | return (unsigned char *)p; |
745 | break; |
746 | |
747 | default: /* an unknown tag */ |
748 | len_err: |
749 | dev_err(&dev->dev, "unknown tag %#x length %d\n" , |
750 | tag, len); |
751 | break; |
752 | } |
753 | |
754 | /* continue to the next tag */ |
755 | if (p[0] & LARGE_TAG) |
756 | p += len + 3; |
757 | else |
758 | p += len + 1; |
759 | } |
760 | |
761 | dev_err(&dev->dev, "no end tag in resource structure\n" ); |
762 | |
763 | return NULL; |
764 | } |
765 | |
766 | /* |
767 | * Core Parsing Functions |
768 | */ |
769 | |
770 | int __init pnpbios_parse_data_stream(struct pnp_dev *dev, |
771 | struct pnp_bios_node *node) |
772 | { |
773 | unsigned char *p = (char *)node->data; |
774 | unsigned char *end = (char *)(node->data + node->size); |
775 | |
776 | p = pnpbios_parse_allocated_resource_data(dev, p, end); |
777 | if (!p) |
778 | return -EIO; |
779 | p = pnpbios_parse_resource_option_data(p, end, dev); |
780 | if (!p) |
781 | return -EIO; |
782 | p = pnpbios_parse_compatible_ids(p, end, dev); |
783 | if (!p) |
784 | return -EIO; |
785 | return 0; |
786 | } |
787 | |
788 | int pnpbios_read_resources_from_node(struct pnp_dev *dev, |
789 | struct pnp_bios_node *node) |
790 | { |
791 | unsigned char *p = (char *)node->data; |
792 | unsigned char *end = (char *)(node->data + node->size); |
793 | |
794 | p = pnpbios_parse_allocated_resource_data(dev, p, end); |
795 | if (!p) |
796 | return -EIO; |
797 | return 0; |
798 | } |
799 | |
800 | int pnpbios_write_resources_to_node(struct pnp_dev *dev, |
801 | struct pnp_bios_node *node) |
802 | { |
803 | unsigned char *p = (char *)node->data; |
804 | unsigned char *end = (char *)(node->data + node->size); |
805 | |
806 | p = pnpbios_encode_allocated_resource_data(dev, p, end); |
807 | if (!p) |
808 | return -EIO; |
809 | return 0; |
810 | } |
811 | |