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; | |
6e3e98d1 AB |
75 | while (i < PNP_MAX_DMA && |
76 | !(res->dma_resource[i].flags & IORESOURCE_UNSET)) | |
77 | i++; | |
1da177e4 LT |
78 | if (i < PNP_MAX_DMA) { |
79 | res->dma_resource[i].flags = IORESOURCE_DMA; // Also clears _UNSET flag | |
80 | if (dma == -1) { | |
81 | res->dma_resource[i].flags |= IORESOURCE_DISABLED; | |
82 | return; | |
83 | } | |
84 | res->dma_resource[i].start = | |
85 | res->dma_resource[i].end = (unsigned long) dma; | |
86 | } | |
87 | } | |
88 | ||
89 | static void | |
90 | pnpbios_parse_allocated_ioresource(struct pnp_resource_table * res, int io, int len) | |
91 | { | |
92 | int i = 0; | |
93 | while (!(res->port_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_PORT) i++; | |
94 | if (i < PNP_MAX_PORT) { | |
95 | res->port_resource[i].flags = IORESOURCE_IO; // Also clears _UNSET flag | |
96 | if (len <= 0 || (io + len -1) >= 0x10003) { | |
97 | res->port_resource[i].flags |= IORESOURCE_DISABLED; | |
98 | return; | |
99 | } | |
100 | res->port_resource[i].start = (unsigned long) io; | |
101 | res->port_resource[i].end = (unsigned long)(io + len - 1); | |
102 | } | |
103 | } | |
104 | ||
105 | static void | |
106 | pnpbios_parse_allocated_memresource(struct pnp_resource_table * res, int mem, int len) | |
107 | { | |
108 | int i = 0; | |
109 | while (!(res->mem_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_MEM) i++; | |
110 | if (i < PNP_MAX_MEM) { | |
111 | res->mem_resource[i].flags = IORESOURCE_MEM; // Also clears _UNSET flag | |
112 | if (len <= 0) { | |
113 | res->mem_resource[i].flags |= IORESOURCE_DISABLED; | |
114 | return; | |
115 | } | |
116 | res->mem_resource[i].start = (unsigned long) mem; | |
117 | res->mem_resource[i].end = (unsigned long)(mem + len - 1); | |
118 | } | |
119 | } | |
120 | ||
121 | static unsigned char * | |
122 | pnpbios_parse_allocated_resource_data(unsigned char * p, unsigned char * end, struct pnp_resource_table * res) | |
123 | { | |
124 | unsigned int len, tag; | |
125 | int io, size, mask, i; | |
126 | ||
127 | if (!p) | |
128 | return NULL; | |
129 | ||
130 | /* Blank the resource table values */ | |
131 | pnp_init_resource_table(res); | |
132 | ||
133 | while ((char *)p < (char *)end) { | |
134 | ||
135 | /* determine the type of tag */ | |
136 | if (p[0] & LARGE_TAG) { /* large tag */ | |
137 | len = (p[2] << 8) | p[1]; | |
138 | tag = p[0]; | |
139 | } else { /* small tag */ | |
140 | len = p[0] & 0x07; | |
141 | tag = ((p[0]>>3) & 0x0f); | |
142 | } | |
143 | ||
144 | switch (tag) { | |
145 | ||
146 | case LARGE_TAG_MEM: | |
147 | if (len != 9) | |
148 | goto len_err; | |
149 | io = *(short *) &p[4]; | |
150 | size = *(short *) &p[10]; | |
151 | pnpbios_parse_allocated_memresource(res, io, size); | |
152 | break; | |
153 | ||
154 | case LARGE_TAG_ANSISTR: | |
155 | /* ignore this for now */ | |
156 | break; | |
157 | ||
158 | case LARGE_TAG_VENDOR: | |
159 | /* do nothing */ | |
160 | break; | |
161 | ||
162 | case LARGE_TAG_MEM32: | |
163 | if (len != 17) | |
164 | goto len_err; | |
165 | io = *(int *) &p[4]; | |
166 | size = *(int *) &p[16]; | |
167 | pnpbios_parse_allocated_memresource(res, io, size); | |
168 | break; | |
169 | ||
170 | case LARGE_TAG_FIXEDMEM32: | |
171 | if (len != 9) | |
172 | goto len_err; | |
173 | io = *(int *) &p[4]; | |
174 | size = *(int *) &p[8]; | |
175 | pnpbios_parse_allocated_memresource(res, io, size); | |
176 | break; | |
177 | ||
178 | case SMALL_TAG_IRQ: | |
179 | if (len < 2 || len > 3) | |
180 | goto len_err; | |
181 | io = -1; | |
182 | mask= p[1] + p[2]*256; | |
183 | for (i=0;i<16;i++, mask=mask>>1) | |
184 | if(mask & 0x01) io=i; | |
185 | pnpbios_parse_allocated_irqresource(res, io); | |
186 | break; | |
187 | ||
188 | case SMALL_TAG_DMA: | |
189 | if (len != 2) | |
190 | goto len_err; | |
191 | io = -1; | |
192 | mask = p[1]; | |
193 | for (i=0;i<8;i++, mask = mask>>1) | |
194 | if(mask & 0x01) io=i; | |
195 | pnpbios_parse_allocated_dmaresource(res, io); | |
196 | break; | |
197 | ||
198 | case SMALL_TAG_PORT: | |
199 | if (len != 7) | |
200 | goto len_err; | |
201 | io = p[2] + p[3] *256; | |
202 | size = p[7]; | |
203 | pnpbios_parse_allocated_ioresource(res, io, size); | |
204 | break; | |
205 | ||
206 | case SMALL_TAG_VENDOR: | |
207 | /* do nothing */ | |
208 | break; | |
209 | ||
210 | case SMALL_TAG_FIXEDPORT: | |
211 | if (len != 3) | |
212 | goto len_err; | |
213 | io = p[1] + p[2] * 256; | |
214 | size = p[3]; | |
215 | pnpbios_parse_allocated_ioresource(res, io, size); | |
216 | break; | |
217 | ||
218 | case SMALL_TAG_END: | |
219 | p = p + 2; | |
220 | return (unsigned char *)p; | |
221 | break; | |
222 | ||
223 | default: /* an unkown tag */ | |
224 | len_err: | |
225 | printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len); | |
226 | break; | |
227 | } | |
228 | ||
229 | /* continue to the next tag */ | |
230 | if (p[0] & LARGE_TAG) | |
231 | p += len + 3; | |
232 | else | |
233 | p += len + 1; | |
234 | } | |
235 | ||
236 | printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n"); | |
237 | ||
238 | return NULL; | |
239 | } | |
240 | ||
241 | ||
242 | /* | |
243 | * Resource Configuration Options | |
244 | */ | |
245 | ||
246 | static void | |
247 | pnpbios_parse_mem_option(unsigned char *p, int size, struct pnp_option *option) | |
248 | { | |
249 | struct pnp_mem * mem; | |
250 | mem = pnpbios_kmalloc(sizeof(struct pnp_mem), GFP_KERNEL); | |
251 | if (!mem) | |
252 | return; | |
253 | mem->min = ((p[5] << 8) | p[4]) << 8; | |
254 | mem->max = ((p[7] << 8) | p[6]) << 8; | |
255 | mem->align = (p[9] << 8) | p[8]; | |
256 | mem->size = ((p[11] << 8) | p[10]) << 8; | |
257 | mem->flags = p[3]; | |
258 | pnp_register_mem_resource(option,mem); | |
259 | return; | |
260 | } | |
261 | ||
262 | static void | |
263 | pnpbios_parse_mem32_option(unsigned char *p, int size, struct pnp_option *option) | |
264 | { | |
265 | struct pnp_mem * mem; | |
266 | mem = pnpbios_kmalloc(sizeof(struct pnp_mem), GFP_KERNEL); | |
267 | if (!mem) | |
268 | return; | |
269 | mem->min = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4]; | |
270 | mem->max = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8]; | |
271 | mem->align = (p[15] << 24) | (p[14] << 16) | (p[13] << 8) | p[12]; | |
272 | mem->size = (p[19] << 24) | (p[18] << 16) | (p[17] << 8) | p[16]; | |
273 | mem->flags = p[3]; | |
274 | pnp_register_mem_resource(option,mem); | |
275 | return; | |
276 | } | |
277 | ||
278 | static void | |
279 | pnpbios_parse_fixed_mem32_option(unsigned char *p, int size, struct pnp_option *option) | |
280 | { | |
281 | struct pnp_mem * mem; | |
282 | mem = pnpbios_kmalloc(sizeof(struct pnp_mem), GFP_KERNEL); | |
283 | if (!mem) | |
284 | return; | |
285 | mem->min = mem->max = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4]; | |
286 | mem->size = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8]; | |
287 | mem->align = 0; | |
288 | mem->flags = p[3]; | |
289 | pnp_register_mem_resource(option,mem); | |
290 | return; | |
291 | } | |
292 | ||
293 | static void | |
294 | pnpbios_parse_irq_option(unsigned char *p, int size, struct pnp_option *option) | |
295 | { | |
296 | struct pnp_irq * irq; | |
297 | unsigned long bits; | |
298 | ||
299 | irq = pnpbios_kmalloc(sizeof(struct pnp_irq), GFP_KERNEL); | |
300 | if (!irq) | |
301 | return; | |
302 | bits = (p[2] << 8) | p[1]; | |
303 | bitmap_copy(irq->map, &bits, 16); | |
304 | if (size > 2) | |
305 | irq->flags = p[3]; | |
306 | else | |
307 | irq->flags = IORESOURCE_IRQ_HIGHEDGE; | |
308 | pnp_register_irq_resource(option,irq); | |
309 | return; | |
310 | } | |
311 | ||
312 | static void | |
313 | pnpbios_parse_dma_option(unsigned char *p, int size, struct pnp_option *option) | |
314 | { | |
315 | struct pnp_dma * dma; | |
316 | dma = pnpbios_kmalloc(sizeof(struct pnp_dma), GFP_KERNEL); | |
317 | if (!dma) | |
318 | return; | |
319 | dma->map = p[1]; | |
320 | dma->flags = p[2]; | |
321 | pnp_register_dma_resource(option,dma); | |
322 | return; | |
323 | } | |
324 | ||
325 | static void | |
326 | pnpbios_parse_port_option(unsigned char *p, int size, struct pnp_option *option) | |
327 | { | |
328 | struct pnp_port * port; | |
329 | port = pnpbios_kmalloc(sizeof(struct pnp_port), GFP_KERNEL); | |
330 | if (!port) | |
331 | return; | |
332 | port->min = (p[3] << 8) | p[2]; | |
333 | port->max = (p[5] << 8) | p[4]; | |
334 | port->align = p[6]; | |
335 | port->size = p[7]; | |
336 | port->flags = p[1] ? PNP_PORT_FLAG_16BITADDR : 0; | |
337 | pnp_register_port_resource(option,port); | |
338 | return; | |
339 | } | |
340 | ||
341 | static void | |
342 | pnpbios_parse_fixed_port_option(unsigned char *p, int size, struct pnp_option *option) | |
343 | { | |
344 | struct pnp_port * port; | |
345 | port = pnpbios_kmalloc(sizeof(struct pnp_port), GFP_KERNEL); | |
346 | if (!port) | |
347 | return; | |
348 | port->min = port->max = (p[2] << 8) | p[1]; | |
349 | port->size = p[3]; | |
350 | port->align = 0; | |
351 | port->flags = PNP_PORT_FLAG_FIXED; | |
352 | pnp_register_port_resource(option,port); | |
353 | return; | |
354 | } | |
355 | ||
356 | static unsigned char * | |
357 | pnpbios_parse_resource_option_data(unsigned char * p, unsigned char * end, struct pnp_dev *dev) | |
358 | { | |
359 | unsigned int len, tag; | |
360 | int priority = 0; | |
361 | struct pnp_option *option, *option_independent; | |
362 | ||
363 | if (!p) | |
364 | return NULL; | |
365 | ||
366 | option_independent = option = pnp_register_independent_option(dev); | |
367 | if (!option) | |
368 | return NULL; | |
369 | ||
370 | while ((char *)p < (char *)end) { | |
371 | ||
372 | /* determine the type of tag */ | |
373 | if (p[0] & LARGE_TAG) { /* large tag */ | |
374 | len = (p[2] << 8) | p[1]; | |
375 | tag = p[0]; | |
376 | } else { /* small tag */ | |
377 | len = p[0] & 0x07; | |
378 | tag = ((p[0]>>3) & 0x0f); | |
379 | } | |
380 | ||
381 | switch (tag) { | |
382 | ||
383 | case LARGE_TAG_MEM: | |
384 | if (len != 9) | |
385 | goto len_err; | |
386 | pnpbios_parse_mem_option(p, len, option); | |
387 | break; | |
388 | ||
389 | case LARGE_TAG_MEM32: | |
390 | if (len != 17) | |
391 | goto len_err; | |
392 | pnpbios_parse_mem32_option(p, len, option); | |
393 | break; | |
394 | ||
395 | case LARGE_TAG_FIXEDMEM32: | |
396 | if (len != 9) | |
397 | goto len_err; | |
398 | pnpbios_parse_fixed_mem32_option(p, len, option); | |
399 | break; | |
400 | ||
401 | case SMALL_TAG_IRQ: | |
402 | if (len < 2 || len > 3) | |
403 | goto len_err; | |
404 | pnpbios_parse_irq_option(p, len, option); | |
405 | break; | |
406 | ||
407 | case SMALL_TAG_DMA: | |
408 | if (len != 2) | |
409 | goto len_err; | |
410 | pnpbios_parse_dma_option(p, len, option); | |
411 | break; | |
412 | ||
413 | case SMALL_TAG_PORT: | |
414 | if (len != 7) | |
415 | goto len_err; | |
416 | pnpbios_parse_port_option(p, len, option); | |
417 | break; | |
418 | ||
419 | case SMALL_TAG_VENDOR: | |
420 | /* do nothing */ | |
421 | break; | |
422 | ||
423 | case SMALL_TAG_FIXEDPORT: | |
424 | if (len != 3) | |
425 | goto len_err; | |
426 | pnpbios_parse_fixed_port_option(p, len, option); | |
427 | break; | |
428 | ||
429 | case SMALL_TAG_STARTDEP: | |
430 | if (len > 1) | |
431 | goto len_err; | |
432 | priority = 0x100 | PNP_RES_PRIORITY_ACCEPTABLE; | |
433 | if (len > 0) | |
434 | priority = 0x100 | p[1]; | |
435 | option = pnp_register_dependent_option(dev, priority); | |
436 | if (!option) | |
437 | return NULL; | |
438 | break; | |
439 | ||
440 | case SMALL_TAG_ENDDEP: | |
441 | if (len != 0) | |
442 | goto len_err; | |
443 | if (option_independent == option) | |
444 | printk(KERN_WARNING "PnPBIOS: Missing SMALL_TAG_STARTDEP tag\n"); | |
445 | option = option_independent; | |
446 | break; | |
447 | ||
448 | case SMALL_TAG_END: | |
449 | if (option_independent != option) | |
450 | printk(KERN_WARNING "PnPBIOS: Missing SMALL_TAG_ENDDEP tag\n"); | |
451 | p = p + 2; | |
452 | return (unsigned char *)p; | |
453 | break; | |
454 | ||
455 | default: /* an unkown tag */ | |
456 | len_err: | |
457 | printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len); | |
458 | break; | |
459 | } | |
460 | ||
461 | /* continue to the next tag */ | |
462 | if (p[0] & LARGE_TAG) | |
463 | p += len + 3; | |
464 | else | |
465 | p += len + 1; | |
466 | } | |
467 | ||
468 | printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n"); | |
469 | ||
470 | return NULL; | |
471 | } | |
472 | ||
473 | ||
474 | /* | |
475 | * Compatible Device IDs | |
476 | */ | |
477 | ||
478 | #define HEX(id,a) hex[((id)>>a) & 15] | |
479 | #define CHAR(id,a) (0x40 + (((id)>>a) & 31)) | |
480 | // | |
481 | ||
482 | void pnpid32_to_pnpid(u32 id, char *str) | |
483 | { | |
484 | const char *hex = "0123456789abcdef"; | |
485 | ||
486 | id = be32_to_cpu(id); | |
487 | str[0] = CHAR(id, 26); | |
488 | str[1] = CHAR(id, 21); | |
489 | str[2] = CHAR(id,16); | |
490 | str[3] = HEX(id, 12); | |
491 | str[4] = HEX(id, 8); | |
492 | str[5] = HEX(id, 4); | |
493 | str[6] = HEX(id, 0); | |
494 | str[7] = '\0'; | |
495 | ||
496 | return; | |
497 | } | |
498 | // | |
499 | #undef CHAR | |
500 | #undef HEX | |
501 | ||
502 | static unsigned char * | |
503 | pnpbios_parse_compatible_ids(unsigned char *p, unsigned char *end, struct pnp_dev *dev) | |
504 | { | |
505 | int len, tag; | |
506 | char id[8]; | |
507 | struct pnp_id *dev_id; | |
508 | ||
509 | if (!p) | |
510 | return NULL; | |
511 | ||
512 | while ((char *)p < (char *)end) { | |
513 | ||
514 | /* determine the type of tag */ | |
515 | if (p[0] & LARGE_TAG) { /* large tag */ | |
516 | len = (p[2] << 8) | p[1]; | |
517 | tag = p[0]; | |
518 | } else { /* small tag */ | |
519 | len = p[0] & 0x07; | |
520 | tag = ((p[0]>>3) & 0x0f); | |
521 | } | |
522 | ||
523 | switch (tag) { | |
524 | ||
525 | case LARGE_TAG_ANSISTR: | |
526 | strncpy(dev->name, p + 3, len >= PNP_NAME_LEN ? PNP_NAME_LEN - 2 : len); | |
527 | dev->name[len >= PNP_NAME_LEN ? PNP_NAME_LEN - 1 : len] = '\0'; | |
528 | break; | |
529 | ||
530 | case SMALL_TAG_COMPATDEVID: /* compatible ID */ | |
531 | if (len != 4) | |
532 | goto len_err; | |
533 | dev_id = pnpbios_kmalloc(sizeof (struct pnp_id), GFP_KERNEL); | |
534 | if (!dev_id) | |
535 | return NULL; | |
536 | memset(dev_id, 0, sizeof(struct pnp_id)); | |
537 | pnpid32_to_pnpid(p[1] | p[2] << 8 | p[3] << 16 | p[4] << 24,id); | |
538 | memcpy(&dev_id->id, id, 7); | |
539 | pnp_add_id(dev_id, dev); | |
540 | break; | |
541 | ||
542 | case SMALL_TAG_END: | |
543 | p = p + 2; | |
544 | return (unsigned char *)p; | |
545 | break; | |
546 | ||
547 | default: /* an unkown tag */ | |
548 | len_err: | |
549 | printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len); | |
550 | break; | |
551 | } | |
552 | ||
553 | /* continue to the next tag */ | |
554 | if (p[0] & LARGE_TAG) | |
555 | p += len + 3; | |
556 | else | |
557 | p += len + 1; | |
558 | } | |
559 | ||
560 | printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n"); | |
561 | ||
562 | return NULL; | |
563 | } | |
564 | ||
565 | ||
566 | /* | |
567 | * Allocated Resource Encoding | |
568 | */ | |
569 | ||
570 | static void pnpbios_encode_mem(unsigned char *p, struct resource * res) | |
571 | { | |
572 | unsigned long base = res->start; | |
573 | unsigned long len = res->end - res->start + 1; | |
574 | p[4] = (base >> 8) & 0xff; | |
575 | p[5] = ((base >> 8) >> 8) & 0xff; | |
576 | p[6] = (base >> 8) & 0xff; | |
577 | p[7] = ((base >> 8) >> 8) & 0xff; | |
578 | p[10] = (len >> 8) & 0xff; | |
579 | p[11] = ((len >> 8) >> 8) & 0xff; | |
580 | return; | |
581 | } | |
582 | ||
583 | static void pnpbios_encode_mem32(unsigned char *p, struct resource * res) | |
584 | { | |
585 | unsigned long base = res->start; | |
586 | unsigned long len = res->end - res->start + 1; | |
587 | p[4] = base & 0xff; | |
588 | p[5] = (base >> 8) & 0xff; | |
589 | p[6] = (base >> 16) & 0xff; | |
590 | p[7] = (base >> 24) & 0xff; | |
591 | p[8] = base & 0xff; | |
592 | p[9] = (base >> 8) & 0xff; | |
593 | p[10] = (base >> 16) & 0xff; | |
594 | p[11] = (base >> 24) & 0xff; | |
595 | p[16] = len & 0xff; | |
596 | p[17] = (len >> 8) & 0xff; | |
597 | p[18] = (len >> 16) & 0xff; | |
598 | p[19] = (len >> 24) & 0xff; | |
599 | return; | |
600 | } | |
601 | ||
602 | static void pnpbios_encode_fixed_mem32(unsigned char *p, struct resource * res) | |
603 | { unsigned long base = res->start; | |
604 | unsigned long len = res->end - res->start + 1; | |
605 | p[4] = base & 0xff; | |
606 | p[5] = (base >> 8) & 0xff; | |
607 | p[6] = (base >> 16) & 0xff; | |
608 | p[7] = (base >> 24) & 0xff; | |
609 | p[8] = len & 0xff; | |
610 | p[9] = (len >> 8) & 0xff; | |
611 | p[10] = (len >> 16) & 0xff; | |
612 | p[11] = (len >> 24) & 0xff; | |
613 | return; | |
614 | } | |
615 | ||
616 | static void pnpbios_encode_irq(unsigned char *p, struct resource * res) | |
617 | { | |
618 | unsigned long map = 0; | |
619 | map = 1 << res->start; | |
620 | p[1] = map & 0xff; | |
621 | p[2] = (map >> 8) & 0xff; | |
622 | return; | |
623 | } | |
624 | ||
625 | static void pnpbios_encode_dma(unsigned char *p, struct resource * res) | |
626 | { | |
627 | unsigned long map = 0; | |
628 | map = 1 << res->start; | |
629 | p[1] = map & 0xff; | |
630 | return; | |
631 | } | |
632 | ||
633 | static void pnpbios_encode_port(unsigned char *p, struct resource * res) | |
634 | { | |
635 | unsigned long base = res->start; | |
636 | unsigned long len = res->end - res->start + 1; | |
637 | p[2] = base & 0xff; | |
638 | p[3] = (base >> 8) & 0xff; | |
639 | p[4] = base & 0xff; | |
640 | p[5] = (base >> 8) & 0xff; | |
641 | p[7] = len & 0xff; | |
642 | return; | |
643 | } | |
644 | ||
645 | static void pnpbios_encode_fixed_port(unsigned char *p, struct resource * res) | |
646 | { | |
647 | unsigned long base = res->start; | |
648 | unsigned long len = res->end - res->start + 1; | |
649 | p[1] = base & 0xff; | |
650 | p[2] = (base >> 8) & 0xff; | |
651 | p[3] = len & 0xff; | |
652 | return; | |
653 | } | |
654 | ||
655 | static unsigned char * | |
656 | pnpbios_encode_allocated_resource_data(unsigned char * p, unsigned char * end, struct pnp_resource_table * res) | |
657 | { | |
658 | unsigned int len, tag; | |
659 | int port = 0, irq = 0, dma = 0, mem = 0; | |
660 | ||
661 | if (!p) | |
662 | return NULL; | |
663 | ||
664 | while ((char *)p < (char *)end) { | |
665 | ||
666 | /* determine the type of tag */ | |
667 | if (p[0] & LARGE_TAG) { /* large tag */ | |
668 | len = (p[2] << 8) | p[1]; | |
669 | tag = p[0]; | |
670 | } else { /* small tag */ | |
671 | len = p[0] & 0x07; | |
672 | tag = ((p[0]>>3) & 0x0f); | |
673 | } | |
674 | ||
675 | switch (tag) { | |
676 | ||
677 | case LARGE_TAG_MEM: | |
678 | if (len != 9) | |
679 | goto len_err; | |
680 | pnpbios_encode_mem(p, &res->mem_resource[mem]); | |
681 | mem++; | |
682 | break; | |
683 | ||
684 | case LARGE_TAG_MEM32: | |
685 | if (len != 17) | |
686 | goto len_err; | |
687 | pnpbios_encode_mem32(p, &res->mem_resource[mem]); | |
688 | mem++; | |
689 | break; | |
690 | ||
691 | case LARGE_TAG_FIXEDMEM32: | |
692 | if (len != 9) | |
693 | goto len_err; | |
694 | pnpbios_encode_fixed_mem32(p, &res->mem_resource[mem]); | |
695 | mem++; | |
696 | break; | |
697 | ||
698 | case SMALL_TAG_IRQ: | |
699 | if (len < 2 || len > 3) | |
700 | goto len_err; | |
701 | pnpbios_encode_irq(p, &res->irq_resource[irq]); | |
702 | irq++; | |
703 | break; | |
704 | ||
705 | case SMALL_TAG_DMA: | |
706 | if (len != 2) | |
707 | goto len_err; | |
708 | pnpbios_encode_dma(p, &res->dma_resource[dma]); | |
709 | dma++; | |
710 | break; | |
711 | ||
712 | case SMALL_TAG_PORT: | |
713 | if (len != 7) | |
714 | goto len_err; | |
715 | pnpbios_encode_port(p, &res->port_resource[port]); | |
716 | port++; | |
717 | break; | |
718 | ||
719 | case SMALL_TAG_VENDOR: | |
720 | /* do nothing */ | |
721 | break; | |
722 | ||
723 | case SMALL_TAG_FIXEDPORT: | |
724 | if (len != 3) | |
725 | goto len_err; | |
726 | pnpbios_encode_fixed_port(p, &res->port_resource[port]); | |
727 | port++; | |
728 | break; | |
729 | ||
730 | case SMALL_TAG_END: | |
731 | p = p + 2; | |
732 | return (unsigned char *)p; | |
733 | break; | |
734 | ||
735 | default: /* an unkown tag */ | |
736 | len_err: | |
737 | printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len); | |
738 | break; | |
739 | } | |
740 | ||
741 | /* continue to the next tag */ | |
742 | if (p[0] & LARGE_TAG) | |
743 | p += len + 3; | |
744 | else | |
745 | p += len + 1; | |
746 | } | |
747 | ||
748 | printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n"); | |
749 | ||
750 | return NULL; | |
751 | } | |
752 | ||
753 | ||
754 | /* | |
755 | * Core Parsing Functions | |
756 | */ | |
757 | ||
758 | int | |
759 | pnpbios_parse_data_stream(struct pnp_dev *dev, struct pnp_bios_node * node) | |
760 | { | |
761 | unsigned char * p = (char *)node->data; | |
762 | unsigned char * end = (char *)(node->data + node->size); | |
763 | p = pnpbios_parse_allocated_resource_data(p,end,&dev->res); | |
764 | if (!p) | |
765 | return -EIO; | |
766 | p = pnpbios_parse_resource_option_data(p,end,dev); | |
767 | if (!p) | |
768 | return -EIO; | |
769 | p = pnpbios_parse_compatible_ids(p,end,dev); | |
770 | if (!p) | |
771 | return -EIO; | |
772 | return 0; | |
773 | } | |
774 | ||
775 | int | |
776 | pnpbios_read_resources_from_node(struct pnp_resource_table *res, | |
777 | struct pnp_bios_node * node) | |
778 | { | |
779 | unsigned char * p = (char *)node->data; | |
780 | unsigned char * end = (char *)(node->data + node->size); | |
781 | p = pnpbios_parse_allocated_resource_data(p,end,res); | |
782 | if (!p) | |
783 | return -EIO; | |
784 | return 0; | |
785 | } | |
786 | ||
787 | int | |
788 | pnpbios_write_resources_to_node(struct pnp_resource_table *res, | |
789 | struct pnp_bios_node * node) | |
790 | { | |
791 | unsigned char * p = (char *)node->data; | |
792 | unsigned char * end = (char *)(node->data + node->size); | |
793 | p = pnpbios_encode_allocated_resource_data(p,end,res); | |
794 | if (!p) | |
795 | return -EIO; | |
796 | return 0; | |
797 | } |