87b4f49a5251b561ceaf23117ddad71f09f81c14
[linux-2.6.git] / drivers / pnp / pnpbios / rsparser.c
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/string.h>
8 #include <linux/slab.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, io, 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, io, 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, io, 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(io, 1);
150                         else
151                                 flags = IORESOURCE_DISABLED;
152                         pnp_add_irq_resource(dev, 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, 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, io, 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, io, size);
187                         break;
188
189                 case SMALL_TAG_END:
190                         p = p + 2;
191                         return (unsigned char *)p;
192                         break;
193
194                 default:        /* an unkown 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, 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, 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, base, base, 0, 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(map.bits, PNP_IRQ_NR);
273         bitmap_copy(map.bits, &bits, 16);
274
275         if (size > 2)
276                 flags = p[3];
277
278         pnp_register_irq_resource(dev, option_flags, &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, p[1], 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, 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, base, base, 0, 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, 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, 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, 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, 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, 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, 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, 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 unkown 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                         strncpy(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(eisa_id & PNP_EISA_ID_MASK, 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 unkown 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 = res->end - res->start + 1;
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 = res->end - res->start + 1;
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 = res->end - res->start + 1;
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 = res->end - res->start + 1;
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 = res->end - res->start + 1;
641
642         if (pnp_resource_enabled(res)) {
643                 base = res->start;
644                 len = res->end - res->start + 1;
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                                 pnp_get_resource(dev, IORESOURCE_MEM, 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                                 pnp_get_resource(dev, IORESOURCE_MEM, 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                                 pnp_get_resource(dev, IORESOURCE_MEM, 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                                 pnp_get_resource(dev, IORESOURCE_IRQ, 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                                 pnp_get_resource(dev, IORESOURCE_DMA, 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                                 pnp_get_resource(dev, IORESOURCE_IO, 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                                 pnp_get_resource(dev, IORESOURCE_IO, 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 unkown 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 }