Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * rsparser.c - parses and encodes pnpbios resource data streams | |
3 | * | |
4 | */ | |
5 | ||
6 | #include <linux/config.h> | |
7 | #include <linux/ctype.h> | |
8 | #include <linux/pnp.h> | |
9 | #include <linux/pnpbios.h> | |
10 | ||
11 | #ifdef CONFIG_PCI | |
12 | #include <linux/pci.h> | |
13 | #else | |
14 | inline void pcibios_penalize_isa_irq(int irq) {} | |
15 | #endif /* CONFIG_PCI */ | |
16 | ||
17 | #include "pnpbios.h" | |
18 | ||
19 | /* standard resource tags */ | |
20 | #define SMALL_TAG_PNPVERNO 0x01 | |
21 | #define SMALL_TAG_LOGDEVID 0x02 | |
22 | #define SMALL_TAG_COMPATDEVID 0x03 | |
23 | #define SMALL_TAG_IRQ 0x04 | |
24 | #define SMALL_TAG_DMA 0x05 | |
25 | #define SMALL_TAG_STARTDEP 0x06 | |
26 | #define SMALL_TAG_ENDDEP 0x07 | |
27 | #define SMALL_TAG_PORT 0x08 | |
28 | #define SMALL_TAG_FIXEDPORT 0x09 | |
29 | #define SMALL_TAG_VENDOR 0x0e | |
30 | #define SMALL_TAG_END 0x0f | |
31 | #define LARGE_TAG 0x80 | |
32 | #define LARGE_TAG_MEM 0x81 | |
33 | #define LARGE_TAG_ANSISTR 0x82 | |
34 | #define LARGE_TAG_UNICODESTR 0x83 | |
35 | #define LARGE_TAG_VENDOR 0x84 | |
36 | #define LARGE_TAG_MEM32 0x85 | |
37 | #define LARGE_TAG_FIXEDMEM32 0x86 | |
38 | ||
39 | /* | |
40 | * Resource Data Stream Format: | |
41 | * | |
42 | * Allocated Resources (required) | |
43 | * end tag -> | |
44 | * Resource Configuration Options (optional) | |
45 | * end tag -> | |
46 | * Compitable Device IDs (optional) | |
47 | * final end tag -> | |
48 | */ | |
49 | ||
50 | /* | |
51 | * Allocated Resources | |
52 | */ | |
53 | ||
54 | static void | |
55 | pnpbios_parse_allocated_irqresource(struct pnp_resource_table * res, int irq) | |
56 | { | |
57 | int i = 0; | |
58 | while (!(res->irq_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_IRQ) i++; | |
59 | if (i < PNP_MAX_IRQ) { | |
60 | res->irq_resource[i].flags = IORESOURCE_IRQ; // Also clears _UNSET flag | |
61 | if (irq == -1) { | |
62 | res->irq_resource[i].flags |= IORESOURCE_DISABLED; | |
63 | return; | |
64 | } | |
65 | res->irq_resource[i].start = | |
66 | res->irq_resource[i].end = (unsigned long) irq; | |
67 | pcibios_penalize_isa_irq(irq); | |
68 | } | |
69 | } | |
70 | ||
71 | static void | |
72 | pnpbios_parse_allocated_dmaresource(struct pnp_resource_table * res, int dma) | |
73 | { | |
74 | int i = 0; | |
75 | while (!(res->dma_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_DMA) i++; | |
76 | if (i < PNP_MAX_DMA) { | |
77 | res->dma_resource[i].flags = IORESOURCE_DMA; // Also clears _UNSET flag | |
78 | if (dma == -1) { | |
79 | res->dma_resource[i].flags |= IORESOURCE_DISABLED; | |
80 | return; | |
81 | } | |
82 | res->dma_resource[i].start = | |
83 | res->dma_resource[i].end = (unsigned long) dma; | |
84 | } | |
85 | } | |
86 | ||
87 | static void | |
88 | pnpbios_parse_allocated_ioresource(struct pnp_resource_table * res, int io, int len) | |
89 | { | |
90 | int i = 0; | |
91 | while (!(res->port_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_PORT) i++; | |
92 | if (i < PNP_MAX_PORT) { | |
93 | res->port_resource[i].flags = IORESOURCE_IO; // Also clears _UNSET flag | |
94 | if (len <= 0 || (io + len -1) >= 0x10003) { | |
95 | res->port_resource[i].flags |= IORESOURCE_DISABLED; | |
96 | return; | |
97 | } | |
98 | res->port_resource[i].start = (unsigned long) io; | |
99 | res->port_resource[i].end = (unsigned long)(io + len - 1); | |
100 | } | |
101 | } | |
102 | ||
103 | static void | |
104 | pnpbios_parse_allocated_memresource(struct pnp_resource_table * res, int mem, int len) | |
105 | { | |
106 | int i = 0; | |
107 | while (!(res->mem_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_MEM) i++; | |
108 | if (i < PNP_MAX_MEM) { | |
109 | res->mem_resource[i].flags = IORESOURCE_MEM; // Also clears _UNSET flag | |
110 | if (len <= 0) { | |
111 | res->mem_resource[i].flags |= IORESOURCE_DISABLED; | |
112 | return; | |
113 | } | |
114 | res->mem_resource[i].start = (unsigned long) mem; | |
115 | res->mem_resource[i].end = (unsigned long)(mem + len - 1); | |
116 | } | |
117 | } | |
118 | ||
119 | static unsigned char * | |
120 | pnpbios_parse_allocated_resource_data(unsigned char * p, unsigned char * end, struct pnp_resource_table * res) | |
121 | { | |
122 | unsigned int len, tag; | |
123 | int io, size, mask, i; | |
124 | ||
125 | if (!p) | |
126 | return NULL; | |
127 | ||
128 | /* Blank the resource table values */ | |
129 | pnp_init_resource_table(res); | |
130 | ||
131 | while ((char *)p < (char *)end) { | |
132 | ||
133 | /* determine the type of tag */ | |
134 | if (p[0] & LARGE_TAG) { /* large tag */ | |
135 | len = (p[2] << 8) | p[1]; | |
136 | tag = p[0]; | |
137 | } else { /* small tag */ | |
138 | len = p[0] & 0x07; | |
139 | tag = ((p[0]>>3) & 0x0f); | |
140 | } | |
141 | ||
142 | switch (tag) { | |
143 | ||
144 | case LARGE_TAG_MEM: | |
145 | if (len != 9) | |
146 | goto len_err; | |
147 | io = *(short *) &p[4]; | |
148 | size = *(short *) &p[10]; | |
149 | pnpbios_parse_allocated_memresource(res, io, size); | |
150 | break; | |
151 | ||
152 | case LARGE_TAG_ANSISTR: | |
153 | /* ignore this for now */ | |
154 | break; | |
155 | ||
156 | case LARGE_TAG_VENDOR: | |
157 | /* do nothing */ | |
158 | break; | |
159 | ||
160 | case LARGE_TAG_MEM32: | |
161 | if (len != 17) | |
162 | goto len_err; | |
163 | io = *(int *) &p[4]; | |
164 | size = *(int *) &p[16]; | |
165 | pnpbios_parse_allocated_memresource(res, io, size); | |
166 | break; | |
167 | ||
168 | case LARGE_TAG_FIXEDMEM32: | |
169 | if (len != 9) | |
170 | goto len_err; | |
171 | io = *(int *) &p[4]; | |
172 | size = *(int *) &p[8]; | |
173 | pnpbios_parse_allocated_memresource(res, io, size); | |
174 | break; | |
175 | ||
176 | case SMALL_TAG_IRQ: | |
177 | if (len < 2 || len > 3) | |
178 | goto len_err; | |
179 | io = -1; | |
180 | mask= p[1] + p[2]*256; | |
181 | for (i=0;i<16;i++, mask=mask>>1) | |
182 | if(mask & 0x01) io=i; | |
183 | pnpbios_parse_allocated_irqresource(res, io); | |
184 | break; | |
185 | ||
186 | case SMALL_TAG_DMA: | |
187 | if (len != 2) | |
188 | goto len_err; | |
189 | io = -1; | |
190 | mask = p[1]; | |
191 | for (i=0;i<8;i++, mask = mask>>1) | |
192 | if(mask & 0x01) io=i; | |
193 | pnpbios_parse_allocated_dmaresource(res, io); | |
194 | break; | |
195 | ||
196 | case SMALL_TAG_PORT: | |
197 | if (len != 7) | |
198 | goto len_err; | |
199 | io = p[2] + p[3] *256; | |
200 | size = p[7]; | |
201 | pnpbios_parse_allocated_ioresource(res, io, size); | |
202 | break; | |
203 | ||
204 | case SMALL_TAG_VENDOR: | |
205 | /* do nothing */ | |
206 | break; | |
207 | ||
208 | case SMALL_TAG_FIXEDPORT: | |
209 | if (len != 3) | |
210 | goto len_err; | |
211 | io = p[1] + p[2] * 256; | |
212 | size = p[3]; | |
213 | pnpbios_parse_allocated_ioresource(res, io, size); | |
214 | break; | |
215 | ||
216 | case SMALL_TAG_END: | |
217 | p = p + 2; | |
218 | return (unsigned char *)p; | |
219 | break; | |
220 | ||
221 | default: /* an unkown tag */ | |
222 | len_err: | |
223 | printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len); | |
224 | break; | |
225 | } | |
226 | ||
227 | /* continue to the next tag */ | |
228 | if (p[0] & LARGE_TAG) | |
229 | p += len + 3; | |
230 | else | |
231 | p += len + 1; | |
232 | } | |
233 | ||
234 | printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n"); | |
235 | ||
236 | return NULL; | |
237 | } | |
238 | ||
239 | ||
240 | /* | |
241 | * Resource Configuration Options | |
242 | */ | |
243 | ||
244 | static void | |
245 | pnpbios_parse_mem_option(unsigned char *p, int size, struct pnp_option *option) | |
246 | { | |
247 | struct pnp_mem * mem; | |
248 | mem = pnpbios_kmalloc(sizeof(struct pnp_mem), GFP_KERNEL); | |
249 | if (!mem) | |
250 | return; | |
251 | mem->min = ((p[5] << 8) | p[4]) << 8; | |
252 | mem->max = ((p[7] << 8) | p[6]) << 8; | |
253 | mem->align = (p[9] << 8) | p[8]; | |
254 | mem->size = ((p[11] << 8) | p[10]) << 8; | |
255 | mem->flags = p[3]; | |
256 | pnp_register_mem_resource(option,mem); | |
257 | return; | |
258 | } | |
259 | ||
260 | static void | |
261 | pnpbios_parse_mem32_option(unsigned char *p, int size, struct pnp_option *option) | |
262 | { | |
263 | struct pnp_mem * mem; | |
264 | mem = pnpbios_kmalloc(sizeof(struct pnp_mem), GFP_KERNEL); | |
265 | if (!mem) | |
266 | return; | |
267 | mem->min = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4]; | |
268 | mem->max = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8]; | |
269 | mem->align = (p[15] << 24) | (p[14] << 16) | (p[13] << 8) | p[12]; | |
270 | mem->size = (p[19] << 24) | (p[18] << 16) | (p[17] << 8) | p[16]; | |
271 | mem->flags = p[3]; | |
272 | pnp_register_mem_resource(option,mem); | |
273 | return; | |
274 | } | |
275 | ||
276 | static void | |
277 | pnpbios_parse_fixed_mem32_option(unsigned char *p, int size, struct pnp_option *option) | |
278 | { | |
279 | struct pnp_mem * mem; | |
280 | mem = pnpbios_kmalloc(sizeof(struct pnp_mem), GFP_KERNEL); | |
281 | if (!mem) | |
282 | return; | |
283 | mem->min = mem->max = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4]; | |
284 | mem->size = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8]; | |
285 | mem->align = 0; | |
286 | mem->flags = p[3]; | |
287 | pnp_register_mem_resource(option,mem); | |
288 | return; | |
289 | } | |
290 | ||
291 | static void | |
292 | pnpbios_parse_irq_option(unsigned char *p, int size, struct pnp_option *option) | |
293 | { | |
294 | struct pnp_irq * irq; | |
295 | unsigned long bits; | |
296 | ||
297 | irq = pnpbios_kmalloc(sizeof(struct pnp_irq), GFP_KERNEL); | |
298 | if (!irq) | |
299 | return; | |
300 | bits = (p[2] << 8) | p[1]; | |
301 | bitmap_copy(irq->map, &bits, 16); | |
302 | if (size > 2) | |
303 | irq->flags = p[3]; | |
304 | else | |
305 | irq->flags = IORESOURCE_IRQ_HIGHEDGE; | |
306 | pnp_register_irq_resource(option,irq); | |
307 | return; | |
308 | } | |
309 | ||
310 | static void | |
311 | pnpbios_parse_dma_option(unsigned char *p, int size, struct pnp_option *option) | |
312 | { | |
313 | struct pnp_dma * dma; | |
314 | dma = pnpbios_kmalloc(sizeof(struct pnp_dma), GFP_KERNEL); | |
315 | if (!dma) | |
316 | return; | |
317 | dma->map = p[1]; | |
318 | dma->flags = p[2]; | |
319 | pnp_register_dma_resource(option,dma); | |
320 | return; | |
321 | } | |
322 | ||
323 | static void | |
324 | pnpbios_parse_port_option(unsigned char *p, int size, struct pnp_option *option) | |
325 | { | |
326 | struct pnp_port * port; | |
327 | port = pnpbios_kmalloc(sizeof(struct pnp_port), GFP_KERNEL); | |
328 | if (!port) | |
329 | return; | |
330 | port->min = (p[3] << 8) | p[2]; | |
331 | port->max = (p[5] << 8) | p[4]; | |
332 | port->align = p[6]; | |
333 | port->size = p[7]; | |
334 | port->flags = p[1] ? PNP_PORT_FLAG_16BITADDR : 0; | |
335 | pnp_register_port_resource(option,port); | |
336 | return; | |
337 | } | |
338 | ||
339 | static void | |
340 | pnpbios_parse_fixed_port_option(unsigned char *p, int size, struct pnp_option *option) | |
341 | { | |
342 | struct pnp_port * port; | |
343 | port = pnpbios_kmalloc(sizeof(struct pnp_port), GFP_KERNEL); | |
344 | if (!port) | |
345 | return; | |
346 | port->min = port->max = (p[2] << 8) | p[1]; | |
347 | port->size = p[3]; | |
348 | port->align = 0; | |
349 | port->flags = PNP_PORT_FLAG_FIXED; | |
350 | pnp_register_port_resource(option,port); | |
351 | return; | |
352 | } | |
353 | ||
354 | static unsigned char * | |
355 | pnpbios_parse_resource_option_data(unsigned char * p, unsigned char * end, struct pnp_dev *dev) | |
356 | { | |
357 | unsigned int len, tag; | |
358 | int priority = 0; | |
359 | struct pnp_option *option, *option_independent; | |
360 | ||
361 | if (!p) | |
362 | return NULL; | |
363 | ||
364 | option_independent = option = pnp_register_independent_option(dev); | |
365 | if (!option) | |
366 | return NULL; | |
367 | ||
368 | while ((char *)p < (char *)end) { | |
369 | ||
370 | /* determine the type of tag */ | |
371 | if (p[0] & LARGE_TAG) { /* large tag */ | |
372 | len = (p[2] << 8) | p[1]; | |
373 | tag = p[0]; | |
374 | } else { /* small tag */ | |
375 | len = p[0] & 0x07; | |
376 | tag = ((p[0]>>3) & 0x0f); | |
377 | } | |
378 | ||
379 | switch (tag) { | |
380 | ||
381 | case LARGE_TAG_MEM: | |
382 | if (len != 9) | |
383 | goto len_err; | |
384 | pnpbios_parse_mem_option(p, len, option); | |
385 | break; | |
386 | ||
387 | case LARGE_TAG_MEM32: | |
388 | if (len != 17) | |
389 | goto len_err; | |
390 | pnpbios_parse_mem32_option(p, len, option); | |
391 | break; | |
392 | ||
393 | case LARGE_TAG_FIXEDMEM32: | |
394 | if (len != 9) | |
395 | goto len_err; | |
396 | pnpbios_parse_fixed_mem32_option(p, len, option); | |
397 | break; | |
398 | ||
399 | case SMALL_TAG_IRQ: | |
400 | if (len < 2 || len > 3) | |
401 | goto len_err; | |
402 | pnpbios_parse_irq_option(p, len, option); | |
403 | break; | |
404 | ||
405 | case SMALL_TAG_DMA: | |
406 | if (len != 2) | |
407 | goto len_err; | |
408 | pnpbios_parse_dma_option(p, len, option); | |
409 | break; | |
410 | ||
411 | case SMALL_TAG_PORT: | |
412 | if (len != 7) | |
413 | goto len_err; | |
414 | pnpbios_parse_port_option(p, len, option); | |
415 | break; | |
416 | ||
417 | case SMALL_TAG_VENDOR: | |
418 | /* do nothing */ | |
419 | break; | |
420 | ||
421 | case SMALL_TAG_FIXEDPORT: | |
422 | if (len != 3) | |
423 | goto len_err; | |
424 | pnpbios_parse_fixed_port_option(p, len, option); | |
425 | break; | |
426 | ||
427 | case SMALL_TAG_STARTDEP: | |
428 | if (len > 1) | |
429 | goto len_err; | |
430 | priority = 0x100 | PNP_RES_PRIORITY_ACCEPTABLE; | |
431 | if (len > 0) | |
432 | priority = 0x100 | p[1]; | |
433 | option = pnp_register_dependent_option(dev, priority); | |
434 | if (!option) | |
435 | return NULL; | |
436 | break; | |
437 | ||
438 | case SMALL_TAG_ENDDEP: | |
439 | if (len != 0) | |
440 | goto len_err; | |
441 | if (option_independent == option) | |
442 | printk(KERN_WARNING "PnPBIOS: Missing SMALL_TAG_STARTDEP tag\n"); | |
443 | option = option_independent; | |
444 | break; | |
445 | ||
446 | case SMALL_TAG_END: | |
447 | if (option_independent != option) | |
448 | printk(KERN_WARNING "PnPBIOS: Missing SMALL_TAG_ENDDEP tag\n"); | |
449 | p = p + 2; | |
450 | return (unsigned char *)p; | |
451 | break; | |
452 | ||
453 | default: /* an unkown tag */ | |
454 | len_err: | |
455 | printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len); | |
456 | break; | |
457 | } | |
458 | ||
459 | /* continue to the next tag */ | |
460 | if (p[0] & LARGE_TAG) | |
461 | p += len + 3; | |
462 | else | |
463 | p += len + 1; | |
464 | } | |
465 | ||
466 | printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n"); | |
467 | ||
468 | return NULL; | |
469 | } | |
470 | ||
471 | ||
472 | /* | |
473 | * Compatible Device IDs | |
474 | */ | |
475 | ||
476 | #define HEX(id,a) hex[((id)>>a) & 15] | |
477 | #define CHAR(id,a) (0x40 + (((id)>>a) & 31)) | |
478 | // | |
479 | ||
480 | void pnpid32_to_pnpid(u32 id, char *str) | |
481 | { | |
482 | const char *hex = "0123456789abcdef"; | |
483 | ||
484 | id = be32_to_cpu(id); | |
485 | str[0] = CHAR(id, 26); | |
486 | str[1] = CHAR(id, 21); | |
487 | str[2] = CHAR(id,16); | |
488 | str[3] = HEX(id, 12); | |
489 | str[4] = HEX(id, 8); | |
490 | str[5] = HEX(id, 4); | |
491 | str[6] = HEX(id, 0); | |
492 | str[7] = '\0'; | |
493 | ||
494 | return; | |
495 | } | |
496 | // | |
497 | #undef CHAR | |
498 | #undef HEX | |
499 | ||
500 | static unsigned char * | |
501 | pnpbios_parse_compatible_ids(unsigned char *p, unsigned char *end, struct pnp_dev *dev) | |
502 | { | |
503 | int len, tag; | |
504 | char id[8]; | |
505 | struct pnp_id *dev_id; | |
506 | ||
507 | if (!p) | |
508 | return NULL; | |
509 | ||
510 | while ((char *)p < (char *)end) { | |
511 | ||
512 | /* determine the type of tag */ | |
513 | if (p[0] & LARGE_TAG) { /* large tag */ | |
514 | len = (p[2] << 8) | p[1]; | |
515 | tag = p[0]; | |
516 | } else { /* small tag */ | |
517 | len = p[0] & 0x07; | |
518 | tag = ((p[0]>>3) & 0x0f); | |
519 | } | |
520 | ||
521 | switch (tag) { | |
522 | ||
523 | case LARGE_TAG_ANSISTR: | |
524 | strncpy(dev->name, p + 3, len >= PNP_NAME_LEN ? PNP_NAME_LEN - 2 : len); | |
525 | dev->name[len >= PNP_NAME_LEN ? PNP_NAME_LEN - 1 : len] = '\0'; | |
526 | break; | |
527 | ||
528 | case SMALL_TAG_COMPATDEVID: /* compatible ID */ | |
529 | if (len != 4) | |
530 | goto len_err; | |
531 | dev_id = pnpbios_kmalloc(sizeof (struct pnp_id), GFP_KERNEL); | |
532 | if (!dev_id) | |
533 | return NULL; | |
534 | memset(dev_id, 0, sizeof(struct pnp_id)); | |
535 | pnpid32_to_pnpid(p[1] | p[2] << 8 | p[3] << 16 | p[4] << 24,id); | |
536 | memcpy(&dev_id->id, id, 7); | |
537 | pnp_add_id(dev_id, dev); | |
538 | break; | |
539 | ||
540 | case SMALL_TAG_END: | |
541 | p = p + 2; | |
542 | return (unsigned char *)p; | |
543 | break; | |
544 | ||
545 | default: /* an unkown tag */ | |
546 | len_err: | |
547 | printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len); | |
548 | break; | |
549 | } | |
550 | ||
551 | /* continue to the next tag */ | |
552 | if (p[0] & LARGE_TAG) | |
553 | p += len + 3; | |
554 | else | |
555 | p += len + 1; | |
556 | } | |
557 | ||
558 | printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n"); | |
559 | ||
560 | return NULL; | |
561 | } | |
562 | ||
563 | ||
564 | /* | |
565 | * Allocated Resource Encoding | |
566 | */ | |
567 | ||
568 | static void pnpbios_encode_mem(unsigned char *p, struct resource * res) | |
569 | { | |
570 | unsigned long base = res->start; | |
571 | unsigned long len = res->end - res->start + 1; | |
572 | p[4] = (base >> 8) & 0xff; | |
573 | p[5] = ((base >> 8) >> 8) & 0xff; | |
574 | p[6] = (base >> 8) & 0xff; | |
575 | p[7] = ((base >> 8) >> 8) & 0xff; | |
576 | p[10] = (len >> 8) & 0xff; | |
577 | p[11] = ((len >> 8) >> 8) & 0xff; | |
578 | return; | |
579 | } | |
580 | ||
581 | static void pnpbios_encode_mem32(unsigned char *p, struct resource * res) | |
582 | { | |
583 | unsigned long base = res->start; | |
584 | unsigned long len = res->end - res->start + 1; | |
585 | p[4] = base & 0xff; | |
586 | p[5] = (base >> 8) & 0xff; | |
587 | p[6] = (base >> 16) & 0xff; | |
588 | p[7] = (base >> 24) & 0xff; | |
589 | p[8] = base & 0xff; | |
590 | p[9] = (base >> 8) & 0xff; | |
591 | p[10] = (base >> 16) & 0xff; | |
592 | p[11] = (base >> 24) & 0xff; | |
593 | p[16] = len & 0xff; | |
594 | p[17] = (len >> 8) & 0xff; | |
595 | p[18] = (len >> 16) & 0xff; | |
596 | p[19] = (len >> 24) & 0xff; | |
597 | return; | |
598 | } | |
599 | ||
600 | static void pnpbios_encode_fixed_mem32(unsigned char *p, struct resource * res) | |
601 | { unsigned long base = res->start; | |
602 | unsigned long len = res->end - res->start + 1; | |
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] = len & 0xff; | |
608 | p[9] = (len >> 8) & 0xff; | |
609 | p[10] = (len >> 16) & 0xff; | |
610 | p[11] = (len >> 24) & 0xff; | |
611 | return; | |
612 | } | |
613 | ||
614 | static void pnpbios_encode_irq(unsigned char *p, struct resource * res) | |
615 | { | |
616 | unsigned long map = 0; | |
617 | map = 1 << res->start; | |
618 | p[1] = map & 0xff; | |
619 | p[2] = (map >> 8) & 0xff; | |
620 | return; | |
621 | } | |
622 | ||
623 | static void pnpbios_encode_dma(unsigned char *p, struct resource * res) | |
624 | { | |
625 | unsigned long map = 0; | |
626 | map = 1 << res->start; | |
627 | p[1] = map & 0xff; | |
628 | return; | |
629 | } | |
630 | ||
631 | static void pnpbios_encode_port(unsigned char *p, struct resource * res) | |
632 | { | |
633 | unsigned long base = res->start; | |
634 | unsigned long len = res->end - res->start + 1; | |
635 | p[2] = base & 0xff; | |
636 | p[3] = (base >> 8) & 0xff; | |
637 | p[4] = base & 0xff; | |
638 | p[5] = (base >> 8) & 0xff; | |
639 | p[7] = len & 0xff; | |
640 | return; | |
641 | } | |
642 | ||
643 | static void pnpbios_encode_fixed_port(unsigned char *p, struct resource * res) | |
644 | { | |
645 | unsigned long base = res->start; | |
646 | unsigned long len = res->end - res->start + 1; | |
647 | p[1] = base & 0xff; | |
648 | p[2] = (base >> 8) & 0xff; | |
649 | p[3] = len & 0xff; | |
650 | return; | |
651 | } | |
652 | ||
653 | static unsigned char * | |
654 | pnpbios_encode_allocated_resource_data(unsigned char * p, unsigned char * end, struct pnp_resource_table * res) | |
655 | { | |
656 | unsigned int len, tag; | |
657 | int port = 0, irq = 0, dma = 0, mem = 0; | |
658 | ||
659 | if (!p) | |
660 | return NULL; | |
661 | ||
662 | while ((char *)p < (char *)end) { | |
663 | ||
664 | /* determine the type of tag */ | |
665 | if (p[0] & LARGE_TAG) { /* large tag */ | |
666 | len = (p[2] << 8) | p[1]; | |
667 | tag = p[0]; | |
668 | } else { /* small tag */ | |
669 | len = p[0] & 0x07; | |
670 | tag = ((p[0]>>3) & 0x0f); | |
671 | } | |
672 | ||
673 | switch (tag) { | |
674 | ||
675 | case LARGE_TAG_MEM: | |
676 | if (len != 9) | |
677 | goto len_err; | |
678 | pnpbios_encode_mem(p, &res->mem_resource[mem]); | |
679 | mem++; | |
680 | break; | |
681 | ||
682 | case LARGE_TAG_MEM32: | |
683 | if (len != 17) | |
684 | goto len_err; | |
685 | pnpbios_encode_mem32(p, &res->mem_resource[mem]); | |
686 | mem++; | |
687 | break; | |
688 | ||
689 | case LARGE_TAG_FIXEDMEM32: | |
690 | if (len != 9) | |
691 | goto len_err; | |
692 | pnpbios_encode_fixed_mem32(p, &res->mem_resource[mem]); | |
693 | mem++; | |
694 | break; | |
695 | ||
696 | case SMALL_TAG_IRQ: | |
697 | if (len < 2 || len > 3) | |
698 | goto len_err; | |
699 | pnpbios_encode_irq(p, &res->irq_resource[irq]); | |
700 | irq++; | |
701 | break; | |
702 | ||
703 | case SMALL_TAG_DMA: | |
704 | if (len != 2) | |
705 | goto len_err; | |
706 | pnpbios_encode_dma(p, &res->dma_resource[dma]); | |
707 | dma++; | |
708 | break; | |
709 | ||
710 | case SMALL_TAG_PORT: | |
711 | if (len != 7) | |
712 | goto len_err; | |
713 | pnpbios_encode_port(p, &res->port_resource[port]); | |
714 | port++; | |
715 | break; | |
716 | ||
717 | case SMALL_TAG_VENDOR: | |
718 | /* do nothing */ | |
719 | break; | |
720 | ||
721 | case SMALL_TAG_FIXEDPORT: | |
722 | if (len != 3) | |
723 | goto len_err; | |
724 | pnpbios_encode_fixed_port(p, &res->port_resource[port]); | |
725 | port++; | |
726 | break; | |
727 | ||
728 | case SMALL_TAG_END: | |
729 | p = p + 2; | |
730 | return (unsigned char *)p; | |
731 | break; | |
732 | ||
733 | default: /* an unkown tag */ | |
734 | len_err: | |
735 | printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len); | |
736 | break; | |
737 | } | |
738 | ||
739 | /* continue to the next tag */ | |
740 | if (p[0] & LARGE_TAG) | |
741 | p += len + 3; | |
742 | else | |
743 | p += len + 1; | |
744 | } | |
745 | ||
746 | printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n"); | |
747 | ||
748 | return NULL; | |
749 | } | |
750 | ||
751 | ||
752 | /* | |
753 | * Core Parsing Functions | |
754 | */ | |
755 | ||
756 | int | |
757 | pnpbios_parse_data_stream(struct pnp_dev *dev, struct pnp_bios_node * node) | |
758 | { | |
759 | unsigned char * p = (char *)node->data; | |
760 | unsigned char * end = (char *)(node->data + node->size); | |
761 | p = pnpbios_parse_allocated_resource_data(p,end,&dev->res); | |
762 | if (!p) | |
763 | return -EIO; | |
764 | p = pnpbios_parse_resource_option_data(p,end,dev); | |
765 | if (!p) | |
766 | return -EIO; | |
767 | p = pnpbios_parse_compatible_ids(p,end,dev); | |
768 | if (!p) | |
769 | return -EIO; | |
770 | return 0; | |
771 | } | |
772 | ||
773 | int | |
774 | pnpbios_read_resources_from_node(struct pnp_resource_table *res, | |
775 | struct pnp_bios_node * node) | |
776 | { | |
777 | unsigned char * p = (char *)node->data; | |
778 | unsigned char * end = (char *)(node->data + node->size); | |
779 | p = pnpbios_parse_allocated_resource_data(p,end,res); | |
780 | if (!p) | |
781 | return -EIO; | |
782 | return 0; | |
783 | } | |
784 | ||
785 | int | |
786 | pnpbios_write_resources_to_node(struct pnp_resource_table *res, | |
787 | struct pnp_bios_node * node) | |
788 | { | |
789 | unsigned char * p = (char *)node->data; | |
790 | unsigned char * end = (char *)(node->data + node->size); | |
791 | p = pnpbios_encode_allocated_resource_data(p,end,res); | |
792 | if (!p) | |
793 | return -EIO; | |
794 | return 0; | |
795 | } |