blob: ef508a4de557fd23ca4816f9313b3e4a66846dea [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * rsparser.c - parses and encodes pnpbios resource data streams
3 *
4 */
5
Linus Torvalds1da177e2005-04-16 15:20:36 -07006#include <linux/ctype.h>
7#include <linux/pnp.h>
8#include <linux/pnpbios.h>
Tim Schmielau4e57b682005-10-30 15:03:48 -08009#include <linux/string.h>
10#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070011
12#ifdef CONFIG_PCI
13#include <linux/pci.h>
14#else
Adrian Bunk9a14d4c2005-07-27 11:43:41 -070015inline void pcibios_penalize_isa_irq(int irq, int active) {}
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#endif /* CONFIG_PCI */
17
18#include "pnpbios.h"
19
20/* standard resource tags */
21#define SMALL_TAG_PNPVERNO 0x01
22#define SMALL_TAG_LOGDEVID 0x02
23#define SMALL_TAG_COMPATDEVID 0x03
24#define SMALL_TAG_IRQ 0x04
25#define SMALL_TAG_DMA 0x05
26#define SMALL_TAG_STARTDEP 0x06
27#define SMALL_TAG_ENDDEP 0x07
28#define SMALL_TAG_PORT 0x08
29#define SMALL_TAG_FIXEDPORT 0x09
30#define SMALL_TAG_VENDOR 0x0e
31#define SMALL_TAG_END 0x0f
32#define LARGE_TAG 0x80
33#define LARGE_TAG_MEM 0x81
34#define LARGE_TAG_ANSISTR 0x82
35#define LARGE_TAG_UNICODESTR 0x83
36#define LARGE_TAG_VENDOR 0x84
37#define LARGE_TAG_MEM32 0x85
38#define LARGE_TAG_FIXEDMEM32 0x86
39
40/*
41 * Resource Data Stream Format:
42 *
43 * Allocated Resources (required)
44 * end tag ->
45 * Resource Configuration Options (optional)
46 * end tag ->
47 * Compitable Device IDs (optional)
48 * final end tag ->
49 */
50
51/*
52 * Allocated Resources
53 */
54
55static void
56pnpbios_parse_allocated_irqresource(struct pnp_resource_table * res, int irq)
57{
58 int i = 0;
59 while (!(res->irq_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_IRQ) i++;
60 if (i < PNP_MAX_IRQ) {
61 res->irq_resource[i].flags = IORESOURCE_IRQ; // Also clears _UNSET flag
62 if (irq == -1) {
63 res->irq_resource[i].flags |= IORESOURCE_DISABLED;
64 return;
65 }
66 res->irq_resource[i].start =
67 res->irq_resource[i].end = (unsigned long) irq;
David Shaohua Lic9c3e452005-04-01 00:07:31 -050068 pcibios_penalize_isa_irq(irq, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 }
70}
71
72static void
73pnpbios_parse_allocated_dmaresource(struct pnp_resource_table * res, int dma)
74{
75 int i = 0;
Adrian Bunk6e3e98d2005-05-01 08:59:29 -070076 while (i < PNP_MAX_DMA &&
77 !(res->dma_resource[i].flags & IORESOURCE_UNSET))
78 i++;
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 if (i < PNP_MAX_DMA) {
80 res->dma_resource[i].flags = IORESOURCE_DMA; // Also clears _UNSET flag
81 if (dma == -1) {
82 res->dma_resource[i].flags |= IORESOURCE_DISABLED;
83 return;
84 }
85 res->dma_resource[i].start =
86 res->dma_resource[i].end = (unsigned long) dma;
87 }
88}
89
90static void
91pnpbios_parse_allocated_ioresource(struct pnp_resource_table * res, int io, int len)
92{
93 int i = 0;
94 while (!(res->port_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_PORT) i++;
95 if (i < PNP_MAX_PORT) {
96 res->port_resource[i].flags = IORESOURCE_IO; // Also clears _UNSET flag
97 if (len <= 0 || (io + len -1) >= 0x10003) {
98 res->port_resource[i].flags |= IORESOURCE_DISABLED;
99 return;
100 }
101 res->port_resource[i].start = (unsigned long) io;
102 res->port_resource[i].end = (unsigned long)(io + len - 1);
103 }
104}
105
106static void
107pnpbios_parse_allocated_memresource(struct pnp_resource_table * res, int mem, int len)
108{
109 int i = 0;
110 while (!(res->mem_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_MEM) i++;
111 if (i < PNP_MAX_MEM) {
112 res->mem_resource[i].flags = IORESOURCE_MEM; // Also clears _UNSET flag
113 if (len <= 0) {
114 res->mem_resource[i].flags |= IORESOURCE_DISABLED;
115 return;
116 }
117 res->mem_resource[i].start = (unsigned long) mem;
118 res->mem_resource[i].end = (unsigned long)(mem + len - 1);
119 }
120}
121
122static unsigned char *
123pnpbios_parse_allocated_resource_data(unsigned char * p, unsigned char * end, struct pnp_resource_table * res)
124{
125 unsigned int len, tag;
126 int io, size, mask, i;
127
128 if (!p)
129 return NULL;
130
131 /* Blank the resource table values */
132 pnp_init_resource_table(res);
133
134 while ((char *)p < (char *)end) {
135
136 /* determine the type of tag */
137 if (p[0] & LARGE_TAG) { /* large tag */
138 len = (p[2] << 8) | p[1];
139 tag = p[0];
140 } else { /* small tag */
141 len = p[0] & 0x07;
142 tag = ((p[0]>>3) & 0x0f);
143 }
144
145 switch (tag) {
146
147 case LARGE_TAG_MEM:
148 if (len != 9)
149 goto len_err;
150 io = *(short *) &p[4];
151 size = *(short *) &p[10];
152 pnpbios_parse_allocated_memresource(res, io, size);
153 break;
154
155 case LARGE_TAG_ANSISTR:
156 /* ignore this for now */
157 break;
158
159 case LARGE_TAG_VENDOR:
160 /* do nothing */
161 break;
162
163 case LARGE_TAG_MEM32:
164 if (len != 17)
165 goto len_err;
166 io = *(int *) &p[4];
167 size = *(int *) &p[16];
168 pnpbios_parse_allocated_memresource(res, io, size);
169 break;
170
171 case LARGE_TAG_FIXEDMEM32:
172 if (len != 9)
173 goto len_err;
174 io = *(int *) &p[4];
175 size = *(int *) &p[8];
176 pnpbios_parse_allocated_memresource(res, io, size);
177 break;
178
179 case SMALL_TAG_IRQ:
180 if (len < 2 || len > 3)
181 goto len_err;
182 io = -1;
183 mask= p[1] + p[2]*256;
184 for (i=0;i<16;i++, mask=mask>>1)
185 if(mask & 0x01) io=i;
186 pnpbios_parse_allocated_irqresource(res, io);
187 break;
188
189 case SMALL_TAG_DMA:
190 if (len != 2)
191 goto len_err;
192 io = -1;
193 mask = p[1];
194 for (i=0;i<8;i++, mask = mask>>1)
195 if(mask & 0x01) io=i;
196 pnpbios_parse_allocated_dmaresource(res, io);
197 break;
198
199 case SMALL_TAG_PORT:
200 if (len != 7)
201 goto len_err;
202 io = p[2] + p[3] *256;
203 size = p[7];
204 pnpbios_parse_allocated_ioresource(res, io, size);
205 break;
206
207 case SMALL_TAG_VENDOR:
208 /* do nothing */
209 break;
210
211 case SMALL_TAG_FIXEDPORT:
212 if (len != 3)
213 goto len_err;
214 io = p[1] + p[2] * 256;
215 size = p[3];
216 pnpbios_parse_allocated_ioresource(res, io, size);
217 break;
218
219 case SMALL_TAG_END:
220 p = p + 2;
221 return (unsigned char *)p;
222 break;
223
224 default: /* an unkown tag */
225 len_err:
226 printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len);
227 break;
228 }
229
230 /* continue to the next tag */
231 if (p[0] & LARGE_TAG)
232 p += len + 3;
233 else
234 p += len + 1;
235 }
236
237 printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n");
238
239 return NULL;
240}
241
242
243/*
244 * Resource Configuration Options
245 */
246
247static void
248pnpbios_parse_mem_option(unsigned char *p, int size, struct pnp_option *option)
249{
250 struct pnp_mem * mem;
Bjorn Helgaasa2822e72005-09-06 15:16:51 -0700251 mem = kcalloc(1, sizeof(struct pnp_mem), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 if (!mem)
253 return;
254 mem->min = ((p[5] << 8) | p[4]) << 8;
255 mem->max = ((p[7] << 8) | p[6]) << 8;
256 mem->align = (p[9] << 8) | p[8];
257 mem->size = ((p[11] << 8) | p[10]) << 8;
258 mem->flags = p[3];
259 pnp_register_mem_resource(option,mem);
260 return;
261}
262
263static void
264pnpbios_parse_mem32_option(unsigned char *p, int size, struct pnp_option *option)
265{
266 struct pnp_mem * mem;
Bjorn Helgaasa2822e72005-09-06 15:16:51 -0700267 mem = kcalloc(1, sizeof(struct pnp_mem), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 if (!mem)
269 return;
270 mem->min = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
271 mem->max = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
272 mem->align = (p[15] << 24) | (p[14] << 16) | (p[13] << 8) | p[12];
273 mem->size = (p[19] << 24) | (p[18] << 16) | (p[17] << 8) | p[16];
274 mem->flags = p[3];
275 pnp_register_mem_resource(option,mem);
276 return;
277}
278
279static void
280pnpbios_parse_fixed_mem32_option(unsigned char *p, int size, struct pnp_option *option)
281{
282 struct pnp_mem * mem;
Bjorn Helgaasa2822e72005-09-06 15:16:51 -0700283 mem = kcalloc(1, sizeof(struct pnp_mem), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 if (!mem)
285 return;
286 mem->min = mem->max = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
287 mem->size = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
288 mem->align = 0;
289 mem->flags = p[3];
290 pnp_register_mem_resource(option,mem);
291 return;
292}
293
294static void
295pnpbios_parse_irq_option(unsigned char *p, int size, struct pnp_option *option)
296{
297 struct pnp_irq * irq;
298 unsigned long bits;
299
Bjorn Helgaasa2822e72005-09-06 15:16:51 -0700300 irq = kcalloc(1, sizeof(struct pnp_irq), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 if (!irq)
302 return;
303 bits = (p[2] << 8) | p[1];
304 bitmap_copy(irq->map, &bits, 16);
305 if (size > 2)
306 irq->flags = p[3];
307 else
308 irq->flags = IORESOURCE_IRQ_HIGHEDGE;
309 pnp_register_irq_resource(option,irq);
310 return;
311}
312
313static void
314pnpbios_parse_dma_option(unsigned char *p, int size, struct pnp_option *option)
315{
316 struct pnp_dma * dma;
Bjorn Helgaasa2822e72005-09-06 15:16:51 -0700317 dma = kcalloc(1, sizeof(struct pnp_dma), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 if (!dma)
319 return;
320 dma->map = p[1];
321 dma->flags = p[2];
322 pnp_register_dma_resource(option,dma);
323 return;
324}
325
326static void
327pnpbios_parse_port_option(unsigned char *p, int size, struct pnp_option *option)
328{
329 struct pnp_port * port;
Bjorn Helgaasa2822e72005-09-06 15:16:51 -0700330 port = kcalloc(1, sizeof(struct pnp_port), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 if (!port)
332 return;
333 port->min = (p[3] << 8) | p[2];
334 port->max = (p[5] << 8) | p[4];
335 port->align = p[6];
336 port->size = p[7];
337 port->flags = p[1] ? PNP_PORT_FLAG_16BITADDR : 0;
338 pnp_register_port_resource(option,port);
339 return;
340}
341
342static void
343pnpbios_parse_fixed_port_option(unsigned char *p, int size, struct pnp_option *option)
344{
345 struct pnp_port * port;
Bjorn Helgaasa2822e72005-09-06 15:16:51 -0700346 port = kcalloc(1, sizeof(struct pnp_port), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 if (!port)
348 return;
349 port->min = port->max = (p[2] << 8) | p[1];
350 port->size = p[3];
351 port->align = 0;
352 port->flags = PNP_PORT_FLAG_FIXED;
353 pnp_register_port_resource(option,port);
354 return;
355}
356
357static unsigned char *
358pnpbios_parse_resource_option_data(unsigned char * p, unsigned char * end, struct pnp_dev *dev)
359{
360 unsigned int len, tag;
361 int priority = 0;
362 struct pnp_option *option, *option_independent;
363
364 if (!p)
365 return NULL;
366
367 option_independent = option = pnp_register_independent_option(dev);
368 if (!option)
369 return NULL;
370
371 while ((char *)p < (char *)end) {
372
373 /* determine the type of tag */
374 if (p[0] & LARGE_TAG) { /* large tag */
375 len = (p[2] << 8) | p[1];
376 tag = p[0];
377 } else { /* small tag */
378 len = p[0] & 0x07;
379 tag = ((p[0]>>3) & 0x0f);
380 }
381
382 switch (tag) {
383
384 case LARGE_TAG_MEM:
385 if (len != 9)
386 goto len_err;
387 pnpbios_parse_mem_option(p, len, option);
388 break;
389
390 case LARGE_TAG_MEM32:
391 if (len != 17)
392 goto len_err;
393 pnpbios_parse_mem32_option(p, len, option);
394 break;
395
396 case LARGE_TAG_FIXEDMEM32:
397 if (len != 9)
398 goto len_err;
399 pnpbios_parse_fixed_mem32_option(p, len, option);
400 break;
401
402 case SMALL_TAG_IRQ:
403 if (len < 2 || len > 3)
404 goto len_err;
405 pnpbios_parse_irq_option(p, len, option);
406 break;
407
408 case SMALL_TAG_DMA:
409 if (len != 2)
410 goto len_err;
411 pnpbios_parse_dma_option(p, len, option);
412 break;
413
414 case SMALL_TAG_PORT:
415 if (len != 7)
416 goto len_err;
417 pnpbios_parse_port_option(p, len, option);
418 break;
419
420 case SMALL_TAG_VENDOR:
421 /* do nothing */
422 break;
423
424 case SMALL_TAG_FIXEDPORT:
425 if (len != 3)
426 goto len_err;
427 pnpbios_parse_fixed_port_option(p, len, option);
428 break;
429
430 case SMALL_TAG_STARTDEP:
431 if (len > 1)
432 goto len_err;
433 priority = 0x100 | PNP_RES_PRIORITY_ACCEPTABLE;
434 if (len > 0)
435 priority = 0x100 | p[1];
436 option = pnp_register_dependent_option(dev, priority);
437 if (!option)
438 return NULL;
439 break;
440
441 case SMALL_TAG_ENDDEP:
442 if (len != 0)
443 goto len_err;
444 if (option_independent == option)
445 printk(KERN_WARNING "PnPBIOS: Missing SMALL_TAG_STARTDEP tag\n");
446 option = option_independent;
447 break;
448
449 case SMALL_TAG_END:
Rene Hermaneb8782e2006-03-23 03:00:57 -0800450 return p + 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451
452 default: /* an unkown tag */
453 len_err:
454 printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len);
455 break;
456 }
457
458 /* continue to the next tag */
459 if (p[0] & LARGE_TAG)
460 p += len + 3;
461 else
462 p += len + 1;
463 }
464
465 printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n");
466
467 return NULL;
468}
469
470
471/*
472 * Compatible Device IDs
473 */
474
475#define HEX(id,a) hex[((id)>>a) & 15]
476#define CHAR(id,a) (0x40 + (((id)>>a) & 31))
477//
478
479void pnpid32_to_pnpid(u32 id, char *str)
480{
481 const char *hex = "0123456789abcdef";
482
483 id = be32_to_cpu(id);
484 str[0] = CHAR(id, 26);
485 str[1] = CHAR(id, 21);
486 str[2] = CHAR(id,16);
487 str[3] = HEX(id, 12);
488 str[4] = HEX(id, 8);
489 str[5] = HEX(id, 4);
490 str[6] = HEX(id, 0);
491 str[7] = '\0';
492
493 return;
494}
495//
496#undef CHAR
497#undef HEX
498
499static unsigned char *
500pnpbios_parse_compatible_ids(unsigned char *p, unsigned char *end, struct pnp_dev *dev)
501{
502 int len, tag;
503 char id[8];
504 struct pnp_id *dev_id;
505
506 if (!p)
507 return NULL;
508
509 while ((char *)p < (char *)end) {
510
511 /* determine the type of tag */
512 if (p[0] & LARGE_TAG) { /* large tag */
513 len = (p[2] << 8) | p[1];
514 tag = p[0];
515 } else { /* small tag */
516 len = p[0] & 0x07;
517 tag = ((p[0]>>3) & 0x0f);
518 }
519
520 switch (tag) {
521
522 case LARGE_TAG_ANSISTR:
523 strncpy(dev->name, p + 3, len >= PNP_NAME_LEN ? PNP_NAME_LEN - 2 : len);
524 dev->name[len >= PNP_NAME_LEN ? PNP_NAME_LEN - 1 : len] = '\0';
525 break;
526
527 case SMALL_TAG_COMPATDEVID: /* compatible ID */
528 if (len != 4)
529 goto len_err;
Bjorn Helgaasa2822e72005-09-06 15:16:51 -0700530 dev_id = kcalloc(1, sizeof (struct pnp_id), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 if (!dev_id)
532 return NULL;
533 memset(dev_id, 0, sizeof(struct pnp_id));
534 pnpid32_to_pnpid(p[1] | p[2] << 8 | p[3] << 16 | p[4] << 24,id);
535 memcpy(&dev_id->id, id, 7);
536 pnp_add_id(dev_id, dev);
537 break;
538
539 case SMALL_TAG_END:
540 p = p + 2;
541 return (unsigned char *)p;
542 break;
543
544 default: /* an unkown tag */
545 len_err:
546 printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len);
547 break;
548 }
549
550 /* continue to the next tag */
551 if (p[0] & LARGE_TAG)
552 p += len + 3;
553 else
554 p += len + 1;
555 }
556
557 printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n");
558
559 return NULL;
560}
561
562
563/*
564 * Allocated Resource Encoding
565 */
566
567static void pnpbios_encode_mem(unsigned char *p, struct resource * res)
568{
569 unsigned long base = res->start;
570 unsigned long len = res->end - res->start + 1;
571 p[4] = (base >> 8) & 0xff;
572 p[5] = ((base >> 8) >> 8) & 0xff;
573 p[6] = (base >> 8) & 0xff;
574 p[7] = ((base >> 8) >> 8) & 0xff;
575 p[10] = (len >> 8) & 0xff;
576 p[11] = ((len >> 8) >> 8) & 0xff;
577 return;
578}
579
580static void pnpbios_encode_mem32(unsigned char *p, struct resource * res)
581{
582 unsigned long base = res->start;
583 unsigned long len = res->end - res->start + 1;
584 p[4] = base & 0xff;
585 p[5] = (base >> 8) & 0xff;
586 p[6] = (base >> 16) & 0xff;
587 p[7] = (base >> 24) & 0xff;
588 p[8] = base & 0xff;
589 p[9] = (base >> 8) & 0xff;
590 p[10] = (base >> 16) & 0xff;
591 p[11] = (base >> 24) & 0xff;
592 p[16] = len & 0xff;
593 p[17] = (len >> 8) & 0xff;
594 p[18] = (len >> 16) & 0xff;
595 p[19] = (len >> 24) & 0xff;
596 return;
597}
598
599static void pnpbios_encode_fixed_mem32(unsigned char *p, struct resource * res)
600{ unsigned long base = res->start;
601 unsigned long len = res->end - res->start + 1;
602 p[4] = base & 0xff;
603 p[5] = (base >> 8) & 0xff;
604 p[6] = (base >> 16) & 0xff;
605 p[7] = (base >> 24) & 0xff;
606 p[8] = len & 0xff;
607 p[9] = (len >> 8) & 0xff;
608 p[10] = (len >> 16) & 0xff;
609 p[11] = (len >> 24) & 0xff;
610 return;
611}
612
613static void pnpbios_encode_irq(unsigned char *p, struct resource * res)
614{
615 unsigned long map = 0;
616 map = 1 << res->start;
617 p[1] = map & 0xff;
618 p[2] = (map >> 8) & 0xff;
619 return;
620}
621
622static void pnpbios_encode_dma(unsigned char *p, struct resource * res)
623{
624 unsigned long map = 0;
625 map = 1 << res->start;
626 p[1] = map & 0xff;
627 return;
628}
629
630static void pnpbios_encode_port(unsigned char *p, struct resource * res)
631{
632 unsigned long base = res->start;
633 unsigned long len = res->end - res->start + 1;
634 p[2] = base & 0xff;
635 p[3] = (base >> 8) & 0xff;
636 p[4] = base & 0xff;
637 p[5] = (base >> 8) & 0xff;
638 p[7] = len & 0xff;
639 return;
640}
641
642static void pnpbios_encode_fixed_port(unsigned char *p, struct resource * res)
643{
644 unsigned long base = res->start;
645 unsigned long len = res->end - res->start + 1;
646 p[1] = base & 0xff;
647 p[2] = (base >> 8) & 0xff;
648 p[3] = len & 0xff;
649 return;
650}
651
652static unsigned char *
653pnpbios_encode_allocated_resource_data(unsigned char * p, unsigned char * end, struct pnp_resource_table * res)
654{
655 unsigned int len, tag;
656 int port = 0, irq = 0, dma = 0, mem = 0;
657
658 if (!p)
659 return NULL;
660
661 while ((char *)p < (char *)end) {
662
663 /* determine the type of tag */
664 if (p[0] & LARGE_TAG) { /* large tag */
665 len = (p[2] << 8) | p[1];
666 tag = p[0];
667 } else { /* small tag */
668 len = p[0] & 0x07;
669 tag = ((p[0]>>3) & 0x0f);
670 }
671
672 switch (tag) {
673
674 case LARGE_TAG_MEM:
675 if (len != 9)
676 goto len_err;
677 pnpbios_encode_mem(p, &res->mem_resource[mem]);
678 mem++;
679 break;
680
681 case LARGE_TAG_MEM32:
682 if (len != 17)
683 goto len_err;
684 pnpbios_encode_mem32(p, &res->mem_resource[mem]);
685 mem++;
686 break;
687
688 case LARGE_TAG_FIXEDMEM32:
689 if (len != 9)
690 goto len_err;
691 pnpbios_encode_fixed_mem32(p, &res->mem_resource[mem]);
692 mem++;
693 break;
694
695 case SMALL_TAG_IRQ:
696 if (len < 2 || len > 3)
697 goto len_err;
698 pnpbios_encode_irq(p, &res->irq_resource[irq]);
699 irq++;
700 break;
701
702 case SMALL_TAG_DMA:
703 if (len != 2)
704 goto len_err;
705 pnpbios_encode_dma(p, &res->dma_resource[dma]);
706 dma++;
707 break;
708
709 case SMALL_TAG_PORT:
710 if (len != 7)
711 goto len_err;
712 pnpbios_encode_port(p, &res->port_resource[port]);
713 port++;
714 break;
715
716 case SMALL_TAG_VENDOR:
717 /* do nothing */
718 break;
719
720 case SMALL_TAG_FIXEDPORT:
721 if (len != 3)
722 goto len_err;
723 pnpbios_encode_fixed_port(p, &res->port_resource[port]);
724 port++;
725 break;
726
727 case SMALL_TAG_END:
728 p = p + 2;
729 return (unsigned char *)p;
730 break;
731
732 default: /* an unkown tag */
733 len_err:
734 printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len);
735 break;
736 }
737
738 /* continue to the next tag */
739 if (p[0] & LARGE_TAG)
740 p += len + 3;
741 else
742 p += len + 1;
743 }
744
745 printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n");
746
747 return NULL;
748}
749
750
751/*
752 * Core Parsing Functions
753 */
754
755int
756pnpbios_parse_data_stream(struct pnp_dev *dev, struct pnp_bios_node * node)
757{
758 unsigned char * p = (char *)node->data;
759 unsigned char * end = (char *)(node->data + node->size);
760 p = pnpbios_parse_allocated_resource_data(p,end,&dev->res);
761 if (!p)
762 return -EIO;
763 p = pnpbios_parse_resource_option_data(p,end,dev);
764 if (!p)
765 return -EIO;
766 p = pnpbios_parse_compatible_ids(p,end,dev);
767 if (!p)
768 return -EIO;
769 return 0;
770}
771
772int
773pnpbios_read_resources_from_node(struct pnp_resource_table *res,
774 struct pnp_bios_node * node)
775{
776 unsigned char * p = (char *)node->data;
777 unsigned char * end = (char *)(node->data + node->size);
778 p = pnpbios_parse_allocated_resource_data(p,end,res);
779 if (!p)
780 return -EIO;
781 return 0;
782}
783
784int
785pnpbios_write_resources_to_node(struct pnp_resource_table *res,
786 struct pnp_bios_node * node)
787{
788 unsigned char * p = (char *)node->data;
789 unsigned char * end = (char *)(node->data + node->size);
790 p = pnpbios_encode_allocated_resource_data(p,end,res);
791 if (!p)
792 return -EIO;
793 return 0;
794}