?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
PNP: add pnp_init_resources(struct pnp_dev *) interface
[linux-2.6/verdex.git] / drivers / pnp / pnpbios / rsparser.c
blobe90a3d4360b2f631220264c72e4841de14b56222
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 "../base.h"
20 #include "pnpbios.h"
21
22 /* standard resource tags */
23 #define SMALL_TAG_PNPVERNO 0x01
24 #define SMALL_TAG_LOGDEVID 0x02
25 #define SMALL_TAG_COMPATDEVID 0x03
26 #define SMALL_TAG_IRQ 0x04
27 #define SMALL_TAG_DMA 0x05
28 #define SMALL_TAG_STARTDEP 0x06
29 #define SMALL_TAG_ENDDEP 0x07
30 #define SMALL_TAG_PORT 0x08
31 #define SMALL_TAG_FIXEDPORT 0x09
32 #define SMALL_TAG_VENDOR 0x0e
33 #define SMALL_TAG_END 0x0f
34 #define LARGE_TAG 0x80
35 #define LARGE_TAG_MEM 0x81
36 #define LARGE_TAG_ANSISTR 0x82
37 #define LARGE_TAG_UNICODESTR 0x83
38 #define LARGE_TAG_VENDOR 0x84
39 #define LARGE_TAG_MEM32 0x85
40 #define LARGE_TAG_FIXEDMEM32 0x86
41
42 /*
43 * Resource Data Stream Format:
44 *
45 * Allocated Resources (required)
46 * end tag ->
47 * Resource Configuration Options (optional)
48 * end tag ->
49 * Compitable Device IDs (optional)
50 * final end tag ->
51 */
52
53 /*
54 * Allocated Resources
55 */
56
57 static void pnpbios_parse_allocated_irqresource(struct pnp_dev *dev, int irq)
58 {
59 struct pnp_resource_table *res = &dev->res;
60 int i = 0;
61
62 while (!(res->irq_resource[i].flags & IORESOURCE_UNSET)
63 && i < PNP_MAX_IRQ)
64 i++;
65 if (i < PNP_MAX_IRQ) {
66 res->irq_resource[i].flags = IORESOURCE_IRQ; // Also clears _UNSET flag
67 if (irq == -1) {
68 res->irq_resource[i].flags |= IORESOURCE_DISABLED;
69 return;
70 }
71 res->irq_resource[i].start =
72 res->irq_resource[i].end = (unsigned long)irq;
73 pcibios_penalize_isa_irq(irq, 1);
74 }
75 }
76
77 static void pnpbios_parse_allocated_dmaresource(struct pnp_dev *dev, int dma)
78 {
79 struct pnp_resource_table *res = &dev->res;
80 int i = 0;
81
82 while (i < PNP_MAX_DMA &&
83 !(res->dma_resource[i].flags & IORESOURCE_UNSET))
84 i++;
85 if (i < PNP_MAX_DMA) {
86 res->dma_resource[i].flags = IORESOURCE_DMA; // Also clears _UNSET flag
87 if (dma == -1) {
88 res->dma_resource[i].flags |= IORESOURCE_DISABLED;
89 return;
90 }
91 res->dma_resource[i].start =
92 res->dma_resource[i].end = (unsigned long)dma;
93 }
94 }
95
96 static void pnpbios_parse_allocated_ioresource(struct pnp_dev *dev,
97 int io, int len)
98 {
99 struct pnp_resource_table *res = &dev->res;
100 int i = 0;
101
102 while (!(res->port_resource[i].flags & IORESOURCE_UNSET)
103 && i < PNP_MAX_PORT)
104 i++;
105 if (i < PNP_MAX_PORT) {
106 res->port_resource[i].flags = IORESOURCE_IO; // Also clears _UNSET flag
107 if (len <= 0 || (io + len - 1) >= 0x10003) {
108 res->port_resource[i].flags |= IORESOURCE_DISABLED;
109 return;
110 }
111 res->port_resource[i].start = (unsigned long)io;
112 res->port_resource[i].end = (unsigned long)(io + len - 1);
113 }
114 }
115
116 static void pnpbios_parse_allocated_memresource(struct pnp_dev *dev,
117 int mem, int len)
118 {
119 struct pnp_resource_table *res = &dev->res;
120 int i = 0;
121
122 while (!(res->mem_resource[i].flags & IORESOURCE_UNSET)
123 && i < PNP_MAX_MEM)
124 i++;
125 if (i < PNP_MAX_MEM) {
126 res->mem_resource[i].flags = IORESOURCE_MEM; // Also clears _UNSET flag
127 if (len <= 0) {
128 res->mem_resource[i].flags |= IORESOURCE_DISABLED;
129 return;
130 }
131 res->mem_resource[i].start = (unsigned long)mem;
132 res->mem_resource[i].end = (unsigned long)(mem + len - 1);
133 }
134 }
135
136 static unsigned char *pnpbios_parse_allocated_resource_data(struct pnp_dev *dev,
137 unsigned char *p,
138 unsigned char *end)
139 {
140 unsigned int len, tag;
141 int io, size, mask, i;
142
143 if (!p)
144 return NULL;
145
146 dev_dbg(&dev->dev, "parse allocated resources\n");
147
148 pnp_init_resources(dev);
149
150 while ((char *)p < (char *)end) {
151
152 /* determine the type of tag */
153 if (p[0] & LARGE_TAG) { /* large tag */
154 len = (p[2] << 8) | p[1];
155 tag = p[0];
156 } else { /* small tag */
157 len = p[0] & 0x07;
158 tag = ((p[0] >> 3) & 0x0f);
159 }
160
161 switch (tag) {
162
163 case LARGE_TAG_MEM:
164 if (len != 9)
165 goto len_err;
166 io = *(short *)&p[4];
167 size = *(short *)&p[10];
168 pnpbios_parse_allocated_memresource(dev, io, size);
169 break;
170
171 case LARGE_TAG_ANSISTR:
172 /* ignore this for now */
173 break;
174
175 case LARGE_TAG_VENDOR:
176 /* do nothing */
177 break;
178
179 case LARGE_TAG_MEM32:
180 if (len != 17)
181 goto len_err;
182 io = *(int *)&p[4];
183 size = *(int *)&p[16];
184 pnpbios_parse_allocated_memresource(dev, io, size);
185 break;
186
187 case LARGE_TAG_FIXEDMEM32:
188 if (len != 9)
189 goto len_err;
190 io = *(int *)&p[4];
191 size = *(int *)&p[8];
192 pnpbios_parse_allocated_memresource(dev, io, size);
193 break;
194
195 case SMALL_TAG_IRQ:
196 if (len < 2 || len > 3)
197 goto len_err;
198 io = -1;
199 mask = p[1] + p[2] * 256;
200 for (i = 0; i < 16; i++, mask = mask >> 1)
201 if (mask & 0x01)
202 io = i;
203 pnpbios_parse_allocated_irqresource(dev, io);
204 break;
205
206 case SMALL_TAG_DMA:
207 if (len != 2)
208 goto len_err;
209 io = -1;
210 mask = p[1];
211 for (i = 0; i < 8; i++, mask = mask >> 1)
212 if (mask & 0x01)
213 io = i;
214 pnpbios_parse_allocated_dmaresource(dev, io);
215 break;
216
217 case SMALL_TAG_PORT:
218 if (len != 7)
219 goto len_err;
220 io = p[2] + p[3] * 256;
221 size = p[7];
222 pnpbios_parse_allocated_ioresource(dev, io, size);
223 break;
224
225 case SMALL_TAG_VENDOR:
226 /* do nothing */
227 break;
228
229 case SMALL_TAG_FIXEDPORT:
230 if (len != 3)
231 goto len_err;
232 io = p[1] + p[2] * 256;
233 size = p[3];
234 pnpbios_parse_allocated_ioresource(dev, io, size);
235 break;
236
237 case SMALL_TAG_END:
238 p = p + 2;
239 return (unsigned char *)p;
240 break;
241
242 default: /* an unkown tag */
243 len_err:
244 printk(KERN_ERR
245 "PnPBIOS: Unknown tag '0x%x', length '%d'.\n",
246 tag, len);
247 break;
248 }
249
250 /* continue to the next tag */
251 if (p[0] & LARGE_TAG)
252 p += len + 3;
253 else
254 p += len + 1;
255 }
256
257 printk(KERN_ERR
258 "PnPBIOS: Resource structure does not contain an end tag.\n");
259
260 return NULL;
261 }
262
263 /*
264 * Resource Configuration Options
265 */
266
267 static __init void pnpbios_parse_mem_option(struct pnp_dev *dev,
268 unsigned char *p, int size,
269 struct pnp_option *option)
270 {
271 struct pnp_mem *mem;
272
273 mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
274 if (!mem)
275 return;
276 mem->min = ((p[5] << 8) | p[4]) << 8;
277 mem->max = ((p[7] << 8) | p[6]) << 8;
278 mem->align = (p[9] << 8) | p[8];
279 mem->size = ((p[11] << 8) | p[10]) << 8;
280 mem->flags = p[3];
281 pnp_register_mem_resource(dev, option, mem);
282 }
283
284 static __init void pnpbios_parse_mem32_option(struct pnp_dev *dev,
285 unsigned char *p, int size,
286 struct pnp_option *option)
287 {
288 struct pnp_mem *mem;
289
290 mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
291 if (!mem)
292 return;
293 mem->min = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
294 mem->max = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
295 mem->align = (p[15] << 24) | (p[14] << 16) | (p[13] << 8) | p[12];
296 mem->size = (p[19] << 24) | (p[18] << 16) | (p[17] << 8) | p[16];
297 mem->flags = p[3];
298 pnp_register_mem_resource(dev, option, mem);
299 }
300
301 static __init void pnpbios_parse_fixed_mem32_option(struct pnp_dev *dev,
302 unsigned char *p, int size,
303 struct pnp_option *option)
304 {
305 struct pnp_mem *mem;
306
307 mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
308 if (!mem)
309 return;
310 mem->min = mem->max = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
311 mem->size = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
312 mem->align = 0;
313 mem->flags = p[3];
314 pnp_register_mem_resource(dev, option, mem);
315 }
316
317 static __init void pnpbios_parse_irq_option(struct pnp_dev *dev,
318 unsigned char *p, int size,
319 struct pnp_option *option)
320 {
321 struct pnp_irq *irq;
322 unsigned long bits;
323
324 irq = kzalloc(sizeof(struct pnp_irq), GFP_KERNEL);
325 if (!irq)
326 return;
327 bits = (p[2] << 8) | p[1];
328 bitmap_copy(irq->map, &bits, 16);
329 if (size > 2)
330 irq->flags = p[3];
331 else
332 irq->flags = IORESOURCE_IRQ_HIGHEDGE;
333 pnp_register_irq_resource(dev, option, irq);
334 }
335
336 static __init void pnpbios_parse_dma_option(struct pnp_dev *dev,
337 unsigned char *p, int size,
338 struct pnp_option *option)
339 {
340 struct pnp_dma *dma;
341
342 dma = kzalloc(sizeof(struct pnp_dma), GFP_KERNEL);
343 if (!dma)
344 return;
345 dma->map = p[1];
346 dma->flags = p[2];
347 pnp_register_dma_resource(dev, option, dma);
348 }
349
350 static __init void pnpbios_parse_port_option(struct pnp_dev *dev,
351 unsigned char *p, int size,
352 struct pnp_option *option)
353 {
354 struct pnp_port *port;
355
356 port = kzalloc(sizeof(struct pnp_port), GFP_KERNEL);
357 if (!port)
358 return;
359 port->min = (p[3] << 8) | p[2];
360 port->max = (p[5] << 8) | p[4];
361 port->align = p[6];
362 port->size = p[7];
363 port->flags = p[1] ? PNP_PORT_FLAG_16BITADDR : 0;
364 pnp_register_port_resource(dev, option, port);
365 }
366
367 static __init void pnpbios_parse_fixed_port_option(struct pnp_dev *dev,
368 unsigned char *p, int size,
369 struct pnp_option *option)
370 {
371 struct pnp_port *port;
372
373 port = kzalloc(sizeof(struct pnp_port), GFP_KERNEL);
374 if (!port)
375 return;
376 port->min = port->max = (p[2] << 8) | p[1];
377 port->size = p[3];
378 port->align = 0;
379 port->flags = PNP_PORT_FLAG_FIXED;
380 pnp_register_port_resource(dev, option, port);
381 }
382
383 static __init unsigned char *
384 pnpbios_parse_resource_option_data(unsigned char *p, unsigned char *end,
385 struct pnp_dev *dev)
386 {
387 unsigned int len, tag;
388 int priority = 0;
389 struct pnp_option *option, *option_independent;
390
391 if (!p)
392 return NULL;
393
394 dev_dbg(&dev->dev, "parse resource options\n");
395
396 option_independent = option = pnp_register_independent_option(dev);
397 if (!option)
398 return NULL;
399
400 while ((char *)p < (char *)end) {
401
402 /* determine the type of tag */
403 if (p[0] & LARGE_TAG) { /* large tag */
404 len = (p[2] << 8) | p[1];
405 tag = p[0];
406 } else { /* small tag */
407 len = p[0] & 0x07;
408 tag = ((p[0] >> 3) & 0x0f);
409 }
410
411 switch (tag) {
412
413 case LARGE_TAG_MEM:
414 if (len != 9)
415 goto len_err;
416 pnpbios_parse_mem_option(dev, p, len, option);
417 break;
418
419 case LARGE_TAG_MEM32:
420 if (len != 17)
421 goto len_err;
422 pnpbios_parse_mem32_option(dev, p, len, option);
423 break;
424
425 case LARGE_TAG_FIXEDMEM32:
426 if (len != 9)
427 goto len_err;
428 pnpbios_parse_fixed_mem32_option(dev, p, len, option);
429 break;
430
431 case SMALL_TAG_IRQ:
432 if (len < 2 || len > 3)
433 goto len_err;
434 pnpbios_parse_irq_option(dev, p, len, option);
435 break;
436
437 case SMALL_TAG_DMA:
438 if (len != 2)
439 goto len_err;
440 pnpbios_parse_dma_option(dev, p, len, option);
441 break;
442
443 case SMALL_TAG_PORT:
444 if (len != 7)
445 goto len_err;
446 pnpbios_parse_port_option(dev, p, len, option);
447 break;
448
449 case SMALL_TAG_VENDOR:
450 /* do nothing */
451 break;
452
453 case SMALL_TAG_FIXEDPORT:
454 if (len != 3)
455 goto len_err;
456 pnpbios_parse_fixed_port_option(dev, p, len, option);
457 break;
458
459 case SMALL_TAG_STARTDEP:
460 if (len > 1)
461 goto len_err;
462 priority = 0x100 | PNP_RES_PRIORITY_ACCEPTABLE;
463 if (len > 0)
464 priority = 0x100 | p[1];
465 option = pnp_register_dependent_option(dev, priority);
466 if (!option)
467 return NULL;
468 break;
469
470 case SMALL_TAG_ENDDEP:
471 if (len != 0)
472 goto len_err;
473 if (option_independent == option)
474 printk(KERN_WARNING
475 "PnPBIOS: Missing SMALL_TAG_STARTDEP tag\n");
476 option = option_independent;
477 dev_dbg(&dev->dev, "end dependent options\n");
478 break;
479
480 case SMALL_TAG_END:
481 return p + 2;
482
483 default: /* an unkown tag */
484 len_err:
485 printk(KERN_ERR
486 "PnPBIOS: Unknown tag '0x%x', length '%d'.\n",
487 tag, len);
488 break;
489 }
490
491 /* continue to the next tag */
492 if (p[0] & LARGE_TAG)
493 p += len + 3;
494 else
495 p += len + 1;
496 }
497
498 printk(KERN_ERR
499 "PnPBIOS: Resource structure does not contain an end tag.\n");
500
501 return NULL;
502 }
503
504 /*
505 * Compatible Device IDs
506 */
507
508 static unsigned char *pnpbios_parse_compatible_ids(unsigned char *p,
509 unsigned char *end,
510 struct pnp_dev *dev)
511 {
512 int len, tag;
513 u32 eisa_id;
514 char id[8];
515 struct pnp_id *dev_id;
516
517 if (!p)
518 return NULL;
519
520 while ((char *)p < (char *)end) {
521
522 /* determine the type of tag */
523 if (p[0] & LARGE_TAG) { /* large tag */
524 len = (p[2] << 8) | p[1];
525 tag = p[0];
526 } else { /* small tag */
527 len = p[0] & 0x07;
528 tag = ((p[0] >> 3) & 0x0f);
529 }
530
531 switch (tag) {
532
533 case LARGE_TAG_ANSISTR:
534 strncpy(dev->name, p + 3,
535 len >= PNP_NAME_LEN ? PNP_NAME_LEN - 2 : len);
536 dev->name[len >=
537 PNP_NAME_LEN ? PNP_NAME_LEN - 1 : len] = '\0';
538 break;
539
540 case SMALL_TAG_COMPATDEVID: /* compatible ID */
541 if (len != 4)
542 goto len_err;
543 eisa_id = p[1] | p[2] << 8 | p[3] << 16 | p[4] << 24;
544 pnp_eisa_id_to_string(eisa_id & PNP_EISA_ID_MASK, id);
545 dev_id = pnp_add_id(dev, id);
546 if (!dev_id)
547 return NULL;
548 break;
549
550 case SMALL_TAG_END:
551 p = p + 2;
552 return (unsigned char *)p;
553 break;
554
555 default: /* an unkown tag */
556 len_err:
557 printk(KERN_ERR
558 "PnPBIOS: Unknown tag '0x%x', length '%d'.\n",
559 tag, len);
560 break;
561 }
562
563 /* continue to the next tag */
564 if (p[0] & LARGE_TAG)
565 p += len + 3;
566 else
567 p += len + 1;
568 }
569
570 printk(KERN_ERR
571 "PnPBIOS: Resource structure does not contain an end tag.\n");
572
573 return NULL;
574 }
575
576 /*
577 * Allocated Resource Encoding
578 */
579
580 static void pnpbios_encode_mem(struct pnp_dev *dev, unsigned char *p,
581 struct resource *res)
582 {
583 unsigned long base = res->start;
584 unsigned long len = res->end - res->start + 1;
585
586 p[4] = (base >> 8) & 0xff;
587 p[5] = ((base >> 8) >> 8) & 0xff;
588 p[6] = (base >> 8) & 0xff;
589 p[7] = ((base >> 8) >> 8) & 0xff;
590 p[10] = (len >> 8) & 0xff;
591 p[11] = ((len >> 8) >> 8) & 0xff;
592
593 dev_dbg(&dev->dev, " encode mem %#llx-%#llx\n",
594 (unsigned long long) res->start, (unsigned long long) res->end);
595 }
596
597 static void pnpbios_encode_mem32(struct pnp_dev *dev, unsigned char *p,
598 struct resource *res)
599 {
600 unsigned long base = res->start;
601 unsigned long len = res->end - res->start + 1;
602
603 p[4] = base & 0xff;
604 p[5] = (base >> 8) & 0xff;
605 p[6] = (base >> 16) & 0xff;
606 p[7] = (base >> 24) & 0xff;
607 p[8] = base & 0xff;
608 p[9] = (base >> 8) & 0xff;
609 p[10] = (base >> 16) & 0xff;
610 p[11] = (base >> 24) & 0xff;
611 p[16] = len & 0xff;
612 p[17] = (len >> 8) & 0xff;
613 p[18] = (len >> 16) & 0xff;
614 p[19] = (len >> 24) & 0xff;
615
616 dev_dbg(&dev->dev, " encode mem32 %#llx-%#llx\n",
617 (unsigned long long) res->start, (unsigned long long) res->end);
618 }
619
620 static void pnpbios_encode_fixed_mem32(struct pnp_dev *dev, unsigned char *p,
621 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 dev_dbg(&dev->dev, " encode fixed_mem32 %#llx-%#llx\n",
636 (unsigned long long) res->start, (unsigned long long) res->end);
637 }
638
639 static void pnpbios_encode_irq(struct pnp_dev *dev, unsigned char *p,
640 struct resource *res)
641 {
642 unsigned long map = 0;
643
644 map = 1 << res->start;
645 p[1] = map & 0xff;
646 p[2] = (map >> 8) & 0xff;
647
648 dev_dbg(&dev->dev, " encode irq %d\n", res->start);
649 }
650
651 static void pnpbios_encode_dma(struct pnp_dev *dev, unsigned char *p,
652 struct resource *res)
653 {
654 unsigned long map = 0;
655
656 map = 1 << res->start;
657 p[1] = map & 0xff;
658
659 dev_dbg(&dev->dev, " encode dma %d\n", res->start);
660 }
661
662 static void pnpbios_encode_port(struct pnp_dev *dev, unsigned char *p,
663 struct resource *res)
664 {
665 unsigned long base = res->start;
666 unsigned long len = res->end - res->start + 1;
667
668 p[2] = base & 0xff;
669 p[3] = (base >> 8) & 0xff;
670 p[4] = base & 0xff;
671 p[5] = (base >> 8) & 0xff;
672 p[7] = len & 0xff;
673
674 dev_dbg(&dev->dev, " encode io %#llx-%#llx\n",
675 (unsigned long long) res->start, (unsigned long long) res->end);
676 }
677
678 static void pnpbios_encode_fixed_port(struct pnp_dev *dev, unsigned char *p,
679 struct resource *res)
680 {
681 unsigned long base = res->start;
682 unsigned long len = res->end - res->start + 1;
683
684 p[1] = base & 0xff;
685 p[2] = (base >> 8) & 0xff;
686 p[3] = len & 0xff;
687
688 dev_dbg(&dev->dev, " encode fixed_io %#llx-%#llx\n",
689 (unsigned long long) res->start, (unsigned long long) res->end);
690 }
691
692 static unsigned char *pnpbios_encode_allocated_resource_data(struct pnp_dev
693 *dev,
694 unsigned char *p,
695 unsigned char *end)
696 {
697 struct pnp_resource_table *res = &dev->res;
698 unsigned int len, tag;
699 int port = 0, irq = 0, dma = 0, mem = 0;
700
701 if (!p)
702 return NULL;
703
704 while ((char *)p < (char *)end) {
705
706 /* determine the type of tag */
707 if (p[0] & LARGE_TAG) { /* large tag */
708 len = (p[2] << 8) | p[1];
709 tag = p[0];
710 } else { /* small tag */
711 len = p[0] & 0x07;
712 tag = ((p[0] >> 3) & 0x0f);
713 }
714
715 switch (tag) {
716
717 case LARGE_TAG_MEM:
718 if (len != 9)
719 goto len_err;
720 pnpbios_encode_mem(dev, p, &res->mem_resource[mem]);
721 mem++;
722 break;
723
724 case LARGE_TAG_MEM32:
725 if (len != 17)
726 goto len_err;
727 pnpbios_encode_mem32(dev, p, &res->mem_resource[mem]);
728 mem++;
729 break;
730
731 case LARGE_TAG_FIXEDMEM32:
732 if (len != 9)
733 goto len_err;
734 pnpbios_encode_fixed_mem32(dev, p, &res->mem_resource[mem]);
735 mem++;
736 break;
737
738 case SMALL_TAG_IRQ:
739 if (len < 2 || len > 3)
740 goto len_err;
741 pnpbios_encode_irq(dev, p, &res->irq_resource[irq]);
742 irq++;
743 break;
744
745 case SMALL_TAG_DMA:
746 if (len != 2)
747 goto len_err;
748 pnpbios_encode_dma(dev, p, &res->dma_resource[dma]);
749 dma++;
750 break;
751
752 case SMALL_TAG_PORT:
753 if (len != 7)
754 goto len_err;
755 pnpbios_encode_port(dev, p, &res->port_resource[port]);
756 port++;
757 break;
758
759 case SMALL_TAG_VENDOR:
760 /* do nothing */
761 break;
762
763 case SMALL_TAG_FIXEDPORT:
764 if (len != 3)
765 goto len_err;
766 pnpbios_encode_fixed_port(dev, p, &res->port_resource[port]);
767 port++;
768 break;
769
770 case SMALL_TAG_END:
771 p = p + 2;
772 return (unsigned char *)p;
773 break;
774
775 default: /* an unkown tag */
776 len_err:
777 printk(KERN_ERR
778 "PnPBIOS: Unknown tag '0x%x', length '%d'.\n",
779 tag, len);
780 break;
781 }
782
783 /* continue to the next tag */
784 if (p[0] & LARGE_TAG)
785 p += len + 3;
786 else
787 p += len + 1;
788 }
789
790 printk(KERN_ERR
791 "PnPBIOS: Resource structure does not contain an end tag.\n");
792
793 return NULL;
794 }
795
796 /*
797 * Core Parsing Functions
798 */
799
800 int __init pnpbios_parse_data_stream(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_parse_allocated_resource_data(dev, p, end);
807 if (!p)
808 return -EIO;
809 p = pnpbios_parse_resource_option_data(p, end, dev);
810 if (!p)
811 return -EIO;
812 p = pnpbios_parse_compatible_ids(p, end, dev);
813 if (!p)
814 return -EIO;
815 return 0;
816 }
817
818 int pnpbios_read_resources_from_node(struct pnp_dev *dev,
819 struct pnp_bios_node *node)
820 {
821 unsigned char *p = (char *)node->data;
822 unsigned char *end = (char *)(node->data + node->size);
823
824 p = pnpbios_parse_allocated_resource_data(dev, p, end);
825 if (!p)
826 return -EIO;
827 return 0;
828 }
829
830 int pnpbios_write_resources_to_node(struct pnp_dev *dev,
831 struct pnp_bios_node *node)
832 {
833 unsigned char *p = (char *)node->data;
834 unsigned char *end = (char *)(node->data + node->size);
835
836 p = pnpbios_encode_allocated_resource_data(dev, p, end);
837 if (!p)
838 return -EIO;
839 return 0;
840 }
Verdex Pro support