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ieee1394: sbp2: fix sbp2_remove_device for error cases
[usb.git] / drivers / pnp / pnpbios / rsparser.c
blob04ecd7b6723000d99cc25df6ccb2658ca87aa560
1 /*
2 * rsparser.c - parses and encodes pnpbios resource data streams
3 */
4
5 #include <linux/ctype.h>
6 #include <linux/pnp.h>
7 #include <linux/pnpbios.h>
8 #include <linux/string.h>
9 #include <linux/slab.h>
10
11 #ifdef CONFIG_PCI
12 #include <linux/pci.h>
13 #else
14 inline void pcibios_penalize_isa_irq(int irq, int active)
15 {
16 }
17 #endif /* CONFIG_PCI */
18
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_irqresource(struct pnp_resource_table *res,
57 int irq)
58 {
59 int i = 0;
60
61 while (!(res->irq_resource[i].flags & IORESOURCE_UNSET)
62 && i < PNP_MAX_IRQ)
63 i++;
64 if (i < PNP_MAX_IRQ) {
65 res->irq_resource[i].flags = IORESOURCE_IRQ; // Also clears _UNSET flag
66 if (irq == -1) {
67 res->irq_resource[i].flags |= IORESOURCE_DISABLED;
68 return;
69 }
70 res->irq_resource[i].start =
71 res->irq_resource[i].end = (unsigned long)irq;
72 pcibios_penalize_isa_irq(irq, 1);
73 }
74 }
75
76 static void pnpbios_parse_allocated_dmaresource(struct pnp_resource_table *res,
77 int dma)
78 {
79 int i = 0;
80
81 while (i < PNP_MAX_DMA &&
82 !(res->dma_resource[i].flags & IORESOURCE_UNSET))
83 i++;
84 if (i < PNP_MAX_DMA) {
85 res->dma_resource[i].flags = IORESOURCE_DMA; // Also clears _UNSET flag
86 if (dma == -1) {
87 res->dma_resource[i].flags |= IORESOURCE_DISABLED;
88 return;
89 }
90 res->dma_resource[i].start =
91 res->dma_resource[i].end = (unsigned long)dma;
92 }
93 }
94
95 static void pnpbios_parse_allocated_ioresource(struct pnp_resource_table *res,
96 int io, int len)
97 {
98 int i = 0;
99
100 while (!(res->port_resource[i].flags & IORESOURCE_UNSET)
101 && i < PNP_MAX_PORT)
102 i++;
103 if (i < PNP_MAX_PORT) {
104 res->port_resource[i].flags = IORESOURCE_IO; // Also clears _UNSET flag
105 if (len <= 0 || (io + len - 1) >= 0x10003) {
106 res->port_resource[i].flags |= IORESOURCE_DISABLED;
107 return;
108 }
109 res->port_resource[i].start = (unsigned long)io;
110 res->port_resource[i].end = (unsigned long)(io + len - 1);
111 }
112 }
113
114 static void pnpbios_parse_allocated_memresource(struct pnp_resource_table *res,
115 int mem, int len)
116 {
117 int i = 0;
118
119 while (!(res->mem_resource[i].flags & IORESOURCE_UNSET)
120 && i < PNP_MAX_MEM)
121 i++;
122 if (i < PNP_MAX_MEM) {
123 res->mem_resource[i].flags = IORESOURCE_MEM; // Also clears _UNSET flag
124 if (len <= 0) {
125 res->mem_resource[i].flags |= IORESOURCE_DISABLED;
126 return;
127 }
128 res->mem_resource[i].start = (unsigned long)mem;
129 res->mem_resource[i].end = (unsigned long)(mem + len - 1);
130 }
131 }
132
133 static unsigned char *pnpbios_parse_allocated_resource_data(unsigned char *p,
134 unsigned char *end,
135 struct
136 pnp_resource_table
137 *res)
138 {
139 unsigned int len, tag;
140 int io, size, mask, i;
141
142 if (!p)
143 return NULL;
144
145 /* Blank the resource table values */
146 pnp_init_resource_table(res);
147
148 while ((char *)p < (char *)end) {
149
150 /* determine the type of tag */
151 if (p[0] & LARGE_TAG) { /* large tag */
152 len = (p[2] << 8) | p[1];
153 tag = p[0];
154 } else { /* small tag */
155 len = p[0] & 0x07;
156 tag = ((p[0] >> 3) & 0x0f);
157 }
158
159 switch (tag) {
160
161 case LARGE_TAG_MEM:
162 if (len != 9)
163 goto len_err;
164 io = *(short *)&p[4];
165 size = *(short *)&p[10];
166 pnpbios_parse_allocated_memresource(res, io, size);
167 break;
168
169 case LARGE_TAG_ANSISTR:
170 /* ignore this for now */
171 break;
172
173 case LARGE_TAG_VENDOR:
174 /* do nothing */
175 break;
176
177 case LARGE_TAG_MEM32:
178 if (len != 17)
179 goto len_err;
180 io = *(int *)&p[4];
181 size = *(int *)&p[16];
182 pnpbios_parse_allocated_memresource(res, io, size);
183 break;
184
185 case LARGE_TAG_FIXEDMEM32:
186 if (len != 9)
187 goto len_err;
188 io = *(int *)&p[4];
189 size = *(int *)&p[8];
190 pnpbios_parse_allocated_memresource(res, io, size);
191 break;
192
193 case SMALL_TAG_IRQ:
194 if (len < 2 || len > 3)
195 goto len_err;
196 io = -1;
197 mask = p[1] + p[2] * 256;
198 for (i = 0; i < 16; i++, mask = mask >> 1)
199 if (mask & 0x01)
200 io = i;
201 pnpbios_parse_allocated_irqresource(res, io);
202 break;
203
204 case SMALL_TAG_DMA:
205 if (len != 2)
206 goto len_err;
207 io = -1;
208 mask = p[1];
209 for (i = 0; i < 8; i++, mask = mask >> 1)
210 if (mask & 0x01)
211 io = i;
212 pnpbios_parse_allocated_dmaresource(res, io);
213 break;
214
215 case SMALL_TAG_PORT:
216 if (len != 7)
217 goto len_err;
218 io = p[2] + p[3] * 256;
219 size = p[7];
220 pnpbios_parse_allocated_ioresource(res, io, size);
221 break;
222
223 case SMALL_TAG_VENDOR:
224 /* do nothing */
225 break;
226
227 case SMALL_TAG_FIXEDPORT:
228 if (len != 3)
229 goto len_err;
230 io = p[1] + p[2] * 256;
231 size = p[3];
232 pnpbios_parse_allocated_ioresource(res, io, size);
233 break;
234
235 case SMALL_TAG_END:
236 p = p + 2;
237 return (unsigned char *)p;
238 break;
239
240 default: /* an unkown tag */
241 len_err:
242 printk(KERN_ERR
243 "PnPBIOS: Unknown tag '0x%x', length '%d'.\n",
244 tag, len);
245 break;
246 }
247
248 /* continue to the next tag */
249 if (p[0] & LARGE_TAG)
250 p += len + 3;
251 else
252 p += len + 1;
253 }
254
255 printk(KERN_ERR
256 "PnPBIOS: Resource structure does not contain an end tag.\n");
257
258 return NULL;
259 }
260
261 /*
262 * Resource Configuration Options
263 */
264
265 static void pnpbios_parse_mem_option(unsigned char *p, int size,
266 struct pnp_option *option)
267 {
268 struct pnp_mem *mem;
269
270 mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
271 if (!mem)
272 return;
273 mem->min = ((p[5] << 8) | p[4]) << 8;
274 mem->max = ((p[7] << 8) | p[6]) << 8;
275 mem->align = (p[9] << 8) | p[8];
276 mem->size = ((p[11] << 8) | p[10]) << 8;
277 mem->flags = p[3];
278 pnp_register_mem_resource(option, mem);
279 }
280
281 static void pnpbios_parse_mem32_option(unsigned char *p, int size,
282 struct pnp_option *option)
283 {
284 struct pnp_mem *mem;
285
286 mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
287 if (!mem)
288 return;
289 mem->min = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
290 mem->max = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
291 mem->align = (p[15] << 24) | (p[14] << 16) | (p[13] << 8) | p[12];
292 mem->size = (p[19] << 24) | (p[18] << 16) | (p[17] << 8) | p[16];
293 mem->flags = p[3];
294 pnp_register_mem_resource(option, mem);
295 }
296
297 static void pnpbios_parse_fixed_mem32_option(unsigned char *p, int size,
298 struct pnp_option *option)
299 {
300 struct pnp_mem *mem;
301 mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
302 if (!mem)
303 return;
304 mem->min = mem->max = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
305 mem->size = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
306 mem->align = 0;
307 mem->flags = p[3];
308 pnp_register_mem_resource(option, mem);
309 }
310
311 static void pnpbios_parse_irq_option(unsigned char *p, int size,
312 struct pnp_option *option)
313 {
314 struct pnp_irq *irq;
315 unsigned long bits;
316
317 irq = kzalloc(sizeof(struct pnp_irq), GFP_KERNEL);
318 if (!irq)
319 return;
320 bits = (p[2] << 8) | p[1];
321 bitmap_copy(irq->map, &bits, 16);
322 if (size > 2)
323 irq->flags = p[3];
324 else
325 irq->flags = IORESOURCE_IRQ_HIGHEDGE;
326 pnp_register_irq_resource(option, irq);
327 }
328
329 static void pnpbios_parse_dma_option(unsigned char *p, int size,
330 struct pnp_option *option)
331 {
332 struct pnp_dma *dma;
333
334 dma = kzalloc(sizeof(struct pnp_dma), GFP_KERNEL);
335 if (!dma)
336 return;
337 dma->map = p[1];
338 dma->flags = p[2];
339 pnp_register_dma_resource(option, dma);
340 }
341
342 static void pnpbios_parse_port_option(unsigned char *p, int size,
343 struct pnp_option *option)
344 {
345 struct pnp_port *port;
346
347 port = kzalloc(sizeof(struct pnp_port), GFP_KERNEL);
348 if (!port)
349 return;
350 port->min = (p[3] << 8) | p[2];
351 port->max = (p[5] << 8) | p[4];
352 port->align = p[6];
353 port->size = p[7];
354 port->flags = p[1] ? PNP_PORT_FLAG_16BITADDR : 0;
355 pnp_register_port_resource(option, port);
356 }
357
358 static void pnpbios_parse_fixed_port_option(unsigned char *p, int size,
359 struct pnp_option *option)
360 {
361 struct pnp_port *port;
362
363 port = kzalloc(sizeof(struct pnp_port), GFP_KERNEL);
364 if (!port)
365 return;
366 port->min = port->max = (p[2] << 8) | p[1];
367 port->size = p[3];
368 port->align = 0;
369 port->flags = PNP_PORT_FLAG_FIXED;
370 pnp_register_port_resource(option, port);
371 }
372
373 static unsigned char *pnpbios_parse_resource_option_data(unsigned char *p,
374 unsigned char *end,
375 struct pnp_dev *dev)
376 {
377 unsigned int len, tag;
378 int priority = 0;
379 struct pnp_option *option, *option_independent;
380
381 if (!p)
382 return NULL;
383
384 option_independent = option = pnp_register_independent_option(dev);
385 if (!option)
386 return NULL;
387
388 while ((char *)p < (char *)end) {
389
390 /* determine the type of tag */
391 if (p[0] & LARGE_TAG) { /* large tag */
392 len = (p[2] << 8) | p[1];
393 tag = p[0];
394 } else { /* small tag */
395 len = p[0] & 0x07;
396 tag = ((p[0] >> 3) & 0x0f);
397 }
398
399 switch (tag) {
400
401 case LARGE_TAG_MEM:
402 if (len != 9)
403 goto len_err;
404 pnpbios_parse_mem_option(p, len, option);
405 break;
406
407 case LARGE_TAG_MEM32:
408 if (len != 17)
409 goto len_err;
410 pnpbios_parse_mem32_option(p, len, option);
411 break;
412
413 case LARGE_TAG_FIXEDMEM32:
414 if (len != 9)
415 goto len_err;
416 pnpbios_parse_fixed_mem32_option(p, len, option);
417 break;
418
419 case SMALL_TAG_IRQ:
420 if (len < 2 || len > 3)
421 goto len_err;
422 pnpbios_parse_irq_option(p, len, option);
423 break;
424
425 case SMALL_TAG_DMA:
426 if (len != 2)
427 goto len_err;
428 pnpbios_parse_dma_option(p, len, option);
429 break;
430
431 case SMALL_TAG_PORT:
432 if (len != 7)
433 goto len_err;
434 pnpbios_parse_port_option(p, len, option);
435 break;
436
437 case SMALL_TAG_VENDOR:
438 /* do nothing */
439 break;
440
441 case SMALL_TAG_FIXEDPORT:
442 if (len != 3)
443 goto len_err;
444 pnpbios_parse_fixed_port_option(p, len, option);
445 break;
446
447 case SMALL_TAG_STARTDEP:
448 if (len > 1)
449 goto len_err;
450 priority = 0x100 | PNP_RES_PRIORITY_ACCEPTABLE;
451 if (len > 0)
452 priority = 0x100 | p[1];
453 option = pnp_register_dependent_option(dev, priority);
454 if (!option)
455 return NULL;
456 break;
457
458 case SMALL_TAG_ENDDEP:
459 if (len != 0)
460 goto len_err;
461 if (option_independent == option)
462 printk(KERN_WARNING
463 "PnPBIOS: Missing SMALL_TAG_STARTDEP tag\n");
464 option = option_independent;
465 break;
466
467 case SMALL_TAG_END:
468 return p + 2;
469
470 default: /* an unkown tag */
471 len_err:
472 printk(KERN_ERR
473 "PnPBIOS: Unknown tag '0x%x', length '%d'.\n",
474 tag, len);
475 break;
476 }
477
478 /* continue to the next tag */
479 if (p[0] & LARGE_TAG)
480 p += len + 3;
481 else
482 p += len + 1;
483 }
484
485 printk(KERN_ERR
486 "PnPBIOS: Resource structure does not contain an end tag.\n");
487
488 return NULL;
489 }
490
491 /*
492 * Compatible Device IDs
493 */
494
495 #define HEX(id,a) hex[((id)>>a) & 15]
496 #define CHAR(id,a) (0x40 + (((id)>>a) & 31))
497
498 void pnpid32_to_pnpid(u32 id, char *str)
499 {
500 const char *hex = "0123456789abcdef";
501
502 id = be32_to_cpu(id);
503 str[0] = CHAR(id, 26);
504 str[1] = CHAR(id, 21);
505 str[2] = CHAR(id, 16);
506 str[3] = HEX(id, 12);
507 str[4] = HEX(id, 8);
508 str[5] = HEX(id, 4);
509 str[6] = HEX(id, 0);
510 str[7] = '\0';
511 }
512
513 #undef CHAR
514 #undef HEX
515
516 static unsigned char *pnpbios_parse_compatible_ids(unsigned char *p,
517 unsigned char *end,
518 struct pnp_dev *dev)
519 {
520 int len, tag;
521 char id[8];
522 struct pnp_id *dev_id;
523
524 if (!p)
525 return NULL;
526
527 while ((char *)p < (char *)end) {
528
529 /* determine the type of tag */
530 if (p[0] & LARGE_TAG) { /* large tag */
531 len = (p[2] << 8) | p[1];
532 tag = p[0];
533 } else { /* small tag */
534 len = p[0] & 0x07;
535 tag = ((p[0] >> 3) & 0x0f);
536 }
537
538 switch (tag) {
539
540 case LARGE_TAG_ANSISTR:
541 strncpy(dev->name, p + 3,
542 len >= PNP_NAME_LEN ? PNP_NAME_LEN - 2 : len);
543 dev->name[len >=
544 PNP_NAME_LEN ? PNP_NAME_LEN - 1 : len] = '\0';
545 break;
546
547 case SMALL_TAG_COMPATDEVID: /* compatible ID */
548 if (len != 4)
549 goto len_err;
550 dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
551 if (!dev_id)
552 return NULL;
553 pnpid32_to_pnpid(p[1] | p[2] << 8 | p[3] << 16 | p[4] <<
554 24, id);
555 memcpy(&dev_id->id, id, 7);
556 pnp_add_id(dev_id, dev);
557 break;
558
559 case SMALL_TAG_END:
560 p = p + 2;
561 return (unsigned char *)p;
562 break;
563
564 default: /* an unkown tag */
565 len_err:
566 printk(KERN_ERR
567 "PnPBIOS: Unknown tag '0x%x', length '%d'.\n",
568 tag, len);
569 break;
570 }
571
572 /* continue to the next tag */
573 if (p[0] & LARGE_TAG)
574 p += len + 3;
575 else
576 p += len + 1;
577 }
578
579 printk(KERN_ERR
580 "PnPBIOS: Resource structure does not contain an end tag.\n");
581
582 return NULL;
583 }
584
585 /*
586 * Allocated Resource Encoding
587 */
588
589 static void pnpbios_encode_mem(unsigned char *p, struct resource *res)
590 {
591 unsigned long base = res->start;
592 unsigned long len = res->end - res->start + 1;
593
594 p[4] = (base >> 8) & 0xff;
595 p[5] = ((base >> 8) >> 8) & 0xff;
596 p[6] = (base >> 8) & 0xff;
597 p[7] = ((base >> 8) >> 8) & 0xff;
598 p[10] = (len >> 8) & 0xff;
599 p[11] = ((len >> 8) >> 8) & 0xff;
600 }
601
602 static void pnpbios_encode_mem32(unsigned char *p, struct resource *res)
603 {
604 unsigned long base = res->start;
605 unsigned long len = res->end - res->start + 1;
606
607 p[4] = base & 0xff;
608 p[5] = (base >> 8) & 0xff;
609 p[6] = (base >> 16) & 0xff;
610 p[7] = (base >> 24) & 0xff;
611 p[8] = base & 0xff;
612 p[9] = (base >> 8) & 0xff;
613 p[10] = (base >> 16) & 0xff;
614 p[11] = (base >> 24) & 0xff;
615 p[16] = len & 0xff;
616 p[17] = (len >> 8) & 0xff;
617 p[18] = (len >> 16) & 0xff;
618 p[19] = (len >> 24) & 0xff;
619 }
620
621 static void pnpbios_encode_fixed_mem32(unsigned char *p, struct resource *res)
622 {
623 unsigned long base = res->start;
624 unsigned long len = res->end - res->start + 1;
625
626 p[4] = base & 0xff;
627 p[5] = (base >> 8) & 0xff;
628 p[6] = (base >> 16) & 0xff;
629 p[7] = (base >> 24) & 0xff;
630 p[8] = len & 0xff;
631 p[9] = (len >> 8) & 0xff;
632 p[10] = (len >> 16) & 0xff;
633 p[11] = (len >> 24) & 0xff;
634 }
635
636 static void pnpbios_encode_irq(unsigned char *p, struct resource *res)
637 {
638 unsigned long map = 0;
639
640 map = 1 << res->start;
641 p[1] = map & 0xff;
642 p[2] = (map >> 8) & 0xff;
643 }
644
645 static void pnpbios_encode_dma(unsigned char *p, struct resource *res)
646 {
647 unsigned long map = 0;
648
649 map = 1 << res->start;
650 p[1] = map & 0xff;
651 }
652
653 static void pnpbios_encode_port(unsigned char *p, struct resource *res)
654 {
655 unsigned long base = res->start;
656 unsigned long len = res->end - res->start + 1;
657
658 p[2] = base & 0xff;
659 p[3] = (base >> 8) & 0xff;
660 p[4] = base & 0xff;
661 p[5] = (base >> 8) & 0xff;
662 p[7] = len & 0xff;
663 }
664
665 static void pnpbios_encode_fixed_port(unsigned char *p, struct resource *res)
666 {
667 unsigned long base = res->start;
668 unsigned long len = res->end - res->start + 1;
669
670 p[1] = base & 0xff;
671 p[2] = (base >> 8) & 0xff;
672 p[3] = len & 0xff;
673 }
674
675 static unsigned char *pnpbios_encode_allocated_resource_data(unsigned char *p,
676 unsigned char *end,
677 struct
678 pnp_resource_table
679 *res)
680 {
681 unsigned int len, tag;
682 int port = 0, irq = 0, dma = 0, mem = 0;
683
684 if (!p)
685 return NULL;
686
687 while ((char *)p < (char *)end) {
688
689 /* determine the type of tag */
690 if (p[0] & LARGE_TAG) { /* large tag */
691 len = (p[2] << 8) | p[1];
692 tag = p[0];
693 } else { /* small tag */
694 len = p[0] & 0x07;
695 tag = ((p[0] >> 3) & 0x0f);
696 }
697
698 switch (tag) {
699
700 case LARGE_TAG_MEM:
701 if (len != 9)
702 goto len_err;
703 pnpbios_encode_mem(p, &res->mem_resource[mem]);
704 mem++;
705 break;
706
707 case LARGE_TAG_MEM32:
708 if (len != 17)
709 goto len_err;
710 pnpbios_encode_mem32(p, &res->mem_resource[mem]);
711 mem++;
712 break;
713
714 case LARGE_TAG_FIXEDMEM32:
715 if (len != 9)
716 goto len_err;
717 pnpbios_encode_fixed_mem32(p, &res->mem_resource[mem]);
718 mem++;
719 break;
720
721 case SMALL_TAG_IRQ:
722 if (len < 2 || len > 3)
723 goto len_err;
724 pnpbios_encode_irq(p, &res->irq_resource[irq]);
725 irq++;
726 break;
727
728 case SMALL_TAG_DMA:
729 if (len != 2)
730 goto len_err;
731 pnpbios_encode_dma(p, &res->dma_resource[dma]);
732 dma++;
733 break;
734
735 case SMALL_TAG_PORT:
736 if (len != 7)
737 goto len_err;
738 pnpbios_encode_port(p, &res->port_resource[port]);
739 port++;
740 break;
741
742 case SMALL_TAG_VENDOR:
743 /* do nothing */
744 break;
745
746 case SMALL_TAG_FIXEDPORT:
747 if (len != 3)
748 goto len_err;
749 pnpbios_encode_fixed_port(p, &res->port_resource[port]);
750 port++;
751 break;
752
753 case SMALL_TAG_END:
754 p = p + 2;
755 return (unsigned char *)p;
756 break;
757
758 default: /* an unkown tag */
759 len_err:
760 printk(KERN_ERR
761 "PnPBIOS: Unknown tag '0x%x', length '%d'.\n",
762 tag, len);
763 break;
764 }
765
766 /* continue to the next tag */
767 if (p[0] & LARGE_TAG)
768 p += len + 3;
769 else
770 p += len + 1;
771 }
772
773 printk(KERN_ERR
774 "PnPBIOS: Resource structure does not contain an end tag.\n");
775
776 return NULL;
777 }
778
779 /*
780 * Core Parsing Functions
781 */
782
783 int pnpbios_parse_data_stream(struct pnp_dev *dev, struct pnp_bios_node *node)
784 {
785 unsigned char *p = (char *)node->data;
786 unsigned char *end = (char *)(node->data + node->size);
787
788 p = pnpbios_parse_allocated_resource_data(p, end, &dev->res);
789 if (!p)
790 return -EIO;
791 p = pnpbios_parse_resource_option_data(p, end, dev);
792 if (!p)
793 return -EIO;
794 p = pnpbios_parse_compatible_ids(p, end, dev);
795 if (!p)
796 return -EIO;
797 return 0;
798 }
799
800 int pnpbios_read_resources_from_node(struct pnp_resource_table *res,
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_parse_allocated_resource_data(p, end, res);
807 if (!p)
808 return -EIO;
809 return 0;
810 }
811
812 int pnpbios_write_resources_to_node(struct pnp_resource_table *res,
813 struct pnp_bios_node *node)
814 {
815 unsigned char *p = (char *)node->data;
816 unsigned char *end = (char *)(node->data + node->size);
817
818 p = pnpbios_encode_allocated_resource_data(p, end, res);
819 if (!p)
820 return -EIO;
821 return 0;
822 }
USB Experimental Work