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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * rsparser.c - parses and encodes pnpbios resource data streams | |
1da177e4 LT |
4 | */ |
5 | ||
1da177e4 LT |
6 | #include <linux/ctype.h> |
7 | #include <linux/pnp.h> | |
4e57b681 | 8 | #include <linux/string.h> |
1da177e4 LT |
9 | |
10 | #ifdef CONFIG_PCI | |
11 | #include <linux/pci.h> | |
12 | #else | |
9dd78466 BH |
13 | inline void pcibios_penalize_isa_irq(int irq, int active) |
14 | { | |
15 | } | |
07d4e9af | 16 | #endif /* CONFIG_PCI */ |
1da177e4 | 17 | |
772defc6 | 18 | #include "../base.h" |
1da177e4 LT |
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 | ||
4ab55d8d | 56 | static void pnpbios_parse_allocated_ioresource(struct pnp_dev *dev, |
cc8c2e30 | 57 | int start, int len) |
1da177e4 | 58 | { |
cc8c2e30 BH |
59 | int flags = 0; |
60 | int end = start + len - 1; | |
06cb58a6 | 61 | |
cc8c2e30 BH |
62 | if (len <= 0 || end >= 0x10003) |
63 | flags |= IORESOURCE_DISABLED; | |
07d4e9af | 64 | |
cc8c2e30 | 65 | pnp_add_io_resource(dev, start, end, flags); |
1da177e4 LT |
66 | } |
67 | ||
4ab55d8d | 68 | static void pnpbios_parse_allocated_memresource(struct pnp_dev *dev, |
d6180f36 | 69 | int start, int len) |
1da177e4 | 70 | { |
d6180f36 BH |
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); | |
1da177e4 LT |
78 | } |
79 | ||
4ab55d8d BH |
80 | static unsigned char *pnpbios_parse_allocated_resource_data(struct pnp_dev *dev, |
81 | unsigned char *p, | |
82 | unsigned char *end) | |
1da177e4 LT |
83 | { |
84 | unsigned int len, tag; | |
dbddd038 | 85 | int io, size, mask, i, flags; |
1da177e4 LT |
86 | |
87 | if (!p) | |
88 | return NULL; | |
89 | ||
2f53432c | 90 | pnp_dbg(&dev->dev, "parse allocated resources\n"); |
72dcc883 | 91 | |
f4490002 | 92 | pnp_init_resources(dev); |
1da177e4 LT |
93 | |
94 | while ((char *)p < (char *)end) { | |
95 | ||
96 | /* determine the type of tag */ | |
9dd78466 | 97 | if (p[0] & LARGE_TAG) { /* large tag */ |
1da177e4 LT |
98 | len = (p[2] << 8) | p[1]; |
99 | tag = p[0]; | |
9dd78466 | 100 | } else { /* small tag */ |
1da177e4 | 101 | len = p[0] & 0x07; |
9dd78466 | 102 | tag = ((p[0] >> 3) & 0x0f); |
1da177e4 LT |
103 | } |
104 | ||
105 | switch (tag) { | |
106 | ||
107 | case LARGE_TAG_MEM: | |
108 | if (len != 9) | |
109 | goto len_err; | |
9dd78466 BH |
110 | io = *(short *)&p[4]; |
111 | size = *(short *)&p[10]; | |
4ab55d8d | 112 | pnpbios_parse_allocated_memresource(dev, io, size); |
1da177e4 LT |
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; | |
9dd78466 BH |
126 | io = *(int *)&p[4]; |
127 | size = *(int *)&p[16]; | |
4ab55d8d | 128 | pnpbios_parse_allocated_memresource(dev, io, size); |
1da177e4 LT |
129 | break; |
130 | ||
131 | case LARGE_TAG_FIXEDMEM32: | |
132 | if (len != 9) | |
133 | goto len_err; | |
9dd78466 BH |
134 | io = *(int *)&p[4]; |
135 | size = *(int *)&p[8]; | |
4ab55d8d | 136 | pnpbios_parse_allocated_memresource(dev, io, size); |
1da177e4 LT |
137 | break; |
138 | ||
139 | case SMALL_TAG_IRQ: | |
140 | if (len < 2 || len > 3) | |
141 | goto len_err; | |
dbddd038 | 142 | flags = 0; |
1da177e4 | 143 | io = -1; |
9dd78466 BH |
144 | mask = p[1] + p[2] * 256; |
145 | for (i = 0; i < 16; i++, mask = mask >> 1) | |
146 | if (mask & 0x01) | |
147 | io = i; | |
dbddd038 BH |
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); | |
1da177e4 LT |
153 | break; |
154 | ||
155 | case SMALL_TAG_DMA: | |
156 | if (len != 2) | |
157 | goto len_err; | |
dc16f5f2 | 158 | flags = 0; |
1da177e4 LT |
159 | io = -1; |
160 | mask = p[1]; | |
9dd78466 BH |
161 | for (i = 0; i < 8; i++, mask = mask >> 1) |
162 | if (mask & 0x01) | |
163 | io = i; | |
dc16f5f2 BH |
164 | if (io == -1) |
165 | flags = IORESOURCE_DISABLED; | |
166 | pnp_add_dma_resource(dev, io, flags); | |
1da177e4 LT |
167 | break; |
168 | ||
169 | case SMALL_TAG_PORT: | |
170 | if (len != 7) | |
171 | goto len_err; | |
9dd78466 | 172 | io = p[2] + p[3] * 256; |
1da177e4 | 173 | size = p[7]; |
4ab55d8d | 174 | pnpbios_parse_allocated_ioresource(dev, io, size); |
1da177e4 LT |
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]; | |
4ab55d8d | 186 | pnpbios_parse_allocated_ioresource(dev, io, size); |
1da177e4 LT |
187 | break; |
188 | ||
189 | case SMALL_TAG_END: | |
190 | p = p + 2; | |
9dd78466 | 191 | return (unsigned char *)p; |
1da177e4 LT |
192 | break; |
193 | ||
af901ca1 | 194 | default: /* an unknown tag */ |
1e0aa9ad | 195 | len_err: |
af11cb2d BH |
196 | dev_err(&dev->dev, "unknown tag %#x length %d\n", |
197 | tag, len); | |
1da177e4 LT |
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 | ||
af11cb2d | 208 | dev_err(&dev->dev, "no end tag in resource structure\n"); |
1da177e4 LT |
209 | |
210 | return NULL; | |
211 | } | |
212 | ||
1da177e4 LT |
213 | /* |
214 | * Resource Configuration Options | |
215 | */ | |
216 | ||
c1caf06c BH |
217 | static __init void pnpbios_parse_mem_option(struct pnp_dev *dev, |
218 | unsigned char *p, int size, | |
1f32ca31 | 219 | unsigned int option_flags) |
1da177e4 | 220 | { |
c227536b BH |
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]; | |
1f32ca31 BH |
229 | pnp_register_mem_resource(dev, option_flags, min, max, align, len, |
230 | flags); | |
1da177e4 LT |
231 | } |
232 | ||
c1caf06c BH |
233 | static __init void pnpbios_parse_mem32_option(struct pnp_dev *dev, |
234 | unsigned char *p, int size, | |
1f32ca31 | 235 | unsigned int option_flags) |
1da177e4 | 236 | { |
c227536b BH |
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]; | |
1f32ca31 BH |
245 | pnp_register_mem_resource(dev, option_flags, min, max, align, len, |
246 | flags); | |
1da177e4 LT |
247 | } |
248 | ||
c1caf06c BH |
249 | static __init void pnpbios_parse_fixed_mem32_option(struct pnp_dev *dev, |
250 | unsigned char *p, int size, | |
1f32ca31 | 251 | unsigned int option_flags) |
1da177e4 | 252 | { |
c227536b BH |
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]; | |
1f32ca31 | 259 | pnp_register_mem_resource(dev, option_flags, base, base, 0, len, flags); |
1da177e4 LT |
260 | } |
261 | ||
c1caf06c BH |
262 | static __init void pnpbios_parse_irq_option(struct pnp_dev *dev, |
263 | unsigned char *p, int size, | |
1f32ca31 | 264 | unsigned int option_flags) |
1da177e4 | 265 | { |
1da177e4 | 266 | unsigned long bits; |
c227536b BH |
267 | pnp_irq_mask_t map; |
268 | unsigned char flags = IORESOURCE_IRQ_HIGHEDGE; | |
1da177e4 | 269 | |
1da177e4 | 270 | bits = (p[2] << 8) | p[1]; |
c227536b BH |
271 | |
272 | bitmap_zero(map.bits, PNP_IRQ_NR); | |
273 | bitmap_copy(map.bits, &bits, 16); | |
274 | ||
1da177e4 | 275 | if (size > 2) |
c227536b BH |
276 | flags = p[3]; |
277 | ||
1f32ca31 | 278 | pnp_register_irq_resource(dev, option_flags, &map, flags); |
1da177e4 LT |
279 | } |
280 | ||
c1caf06c BH |
281 | static __init void pnpbios_parse_dma_option(struct pnp_dev *dev, |
282 | unsigned char *p, int size, | |
1f32ca31 | 283 | unsigned int option_flags) |
1da177e4 | 284 | { |
1f32ca31 | 285 | pnp_register_dma_resource(dev, option_flags, p[1], p[2]); |
1da177e4 LT |
286 | } |
287 | ||
c1caf06c BH |
288 | static __init void pnpbios_parse_port_option(struct pnp_dev *dev, |
289 | unsigned char *p, int size, | |
1f32ca31 | 290 | unsigned int option_flags) |
1da177e4 | 291 | { |
c227536b BH |
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; | |
1f32ca31 BH |
300 | pnp_register_port_resource(dev, option_flags, min, max, align, len, |
301 | flags); | |
1da177e4 LT |
302 | } |
303 | ||
c1caf06c BH |
304 | static __init void pnpbios_parse_fixed_port_option(struct pnp_dev *dev, |
305 | unsigned char *p, int size, | |
1f32ca31 | 306 | unsigned int option_flags) |
1da177e4 | 307 | { |
c227536b BH |
308 | resource_size_t base, len; |
309 | ||
310 | base = (p[2] << 8) | p[1]; | |
311 | len = p[3]; | |
1f32ca31 | 312 | pnp_register_port_resource(dev, option_flags, base, base, 0, len, |
c227536b | 313 | IORESOURCE_IO_FIXED); |
1da177e4 LT |
314 | } |
315 | ||
2bb9a6b3 TR |
316 | static __init unsigned char * |
317 | pnpbios_parse_resource_option_data(unsigned char *p, unsigned char *end, | |
1f32ca31 | 318 | struct pnp_dev *dev) |
1da177e4 LT |
319 | { |
320 | unsigned int len, tag; | |
e2a1a6f1 | 321 | int priority; |
1f32ca31 | 322 | unsigned int option_flags; |
1da177e4 LT |
323 | |
324 | if (!p) | |
325 | return NULL; | |
326 | ||
2f53432c | 327 | pnp_dbg(&dev->dev, "parse resource options\n"); |
1f32ca31 | 328 | option_flags = 0; |
1da177e4 LT |
329 | while ((char *)p < (char *)end) { |
330 | ||
331 | /* determine the type of tag */ | |
9dd78466 | 332 | if (p[0] & LARGE_TAG) { /* large tag */ |
1da177e4 LT |
333 | len = (p[2] << 8) | p[1]; |
334 | tag = p[0]; | |
9dd78466 | 335 | } else { /* small tag */ |
1da177e4 | 336 | len = p[0] & 0x07; |
9dd78466 | 337 | tag = ((p[0] >> 3) & 0x0f); |
1da177e4 LT |
338 | } |
339 | ||
340 | switch (tag) { | |
341 | ||
342 | case LARGE_TAG_MEM: | |
343 | if (len != 9) | |
344 | goto len_err; | |
1f32ca31 | 345 | pnpbios_parse_mem_option(dev, p, len, option_flags); |
1da177e4 LT |
346 | break; |
347 | ||
348 | case LARGE_TAG_MEM32: | |
349 | if (len != 17) | |
350 | goto len_err; | |
1f32ca31 | 351 | pnpbios_parse_mem32_option(dev, p, len, option_flags); |
1da177e4 LT |
352 | break; |
353 | ||
354 | case LARGE_TAG_FIXEDMEM32: | |
355 | if (len != 9) | |
356 | goto len_err; | |
1f32ca31 BH |
357 | pnpbios_parse_fixed_mem32_option(dev, p, len, |
358 | option_flags); | |
1da177e4 LT |
359 | break; |
360 | ||
361 | case SMALL_TAG_IRQ: | |
362 | if (len < 2 || len > 3) | |
363 | goto len_err; | |
1f32ca31 | 364 | pnpbios_parse_irq_option(dev, p, len, option_flags); |
1da177e4 LT |
365 | break; |
366 | ||
367 | case SMALL_TAG_DMA: | |
368 | if (len != 2) | |
369 | goto len_err; | |
1f32ca31 | 370 | pnpbios_parse_dma_option(dev, p, len, option_flags); |
1da177e4 LT |
371 | break; |
372 | ||
373 | case SMALL_TAG_PORT: | |
374 | if (len != 7) | |
375 | goto len_err; | |
1f32ca31 | 376 | pnpbios_parse_port_option(dev, p, len, option_flags); |
1da177e4 LT |
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; | |
1f32ca31 BH |
386 | pnpbios_parse_fixed_port_option(dev, p, len, |
387 | option_flags); | |
1da177e4 LT |
388 | break; |
389 | ||
390 | case SMALL_TAG_STARTDEP: | |
391 | if (len > 1) | |
392 | goto len_err; | |
e2a1a6f1 | 393 | priority = PNP_RES_PRIORITY_ACCEPTABLE; |
1da177e4 | 394 | if (len > 0) |
e2a1a6f1 | 395 | priority = p[1]; |
1f32ca31 | 396 | option_flags = pnp_new_dependent_set(dev, priority); |
1da177e4 LT |
397 | break; |
398 | ||
399 | case SMALL_TAG_ENDDEP: | |
400 | if (len != 0) | |
401 | goto len_err; | |
1f32ca31 | 402 | option_flags = 0; |
1da177e4 LT |
403 | break; |
404 | ||
405 | case SMALL_TAG_END: | |
9dd78466 | 406 | return p + 2; |
1da177e4 | 407 | |
af901ca1 | 408 | default: /* an unknown tag */ |
1e0aa9ad | 409 | len_err: |
af11cb2d BH |
410 | dev_err(&dev->dev, "unknown tag %#x length %d\n", |
411 | tag, len); | |
1da177e4 LT |
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 | ||
af11cb2d | 422 | dev_err(&dev->dev, "no end tag in resource structure\n"); |
1da177e4 LT |
423 | |
424 | return NULL; | |
425 | } | |
426 | ||
1da177e4 LT |
427 | /* |
428 | * Compatible Device IDs | |
429 | */ | |
430 | ||
9dd78466 BH |
431 | static unsigned char *pnpbios_parse_compatible_ids(unsigned char *p, |
432 | unsigned char *end, | |
433 | struct pnp_dev *dev) | |
1da177e4 LT |
434 | { |
435 | int len, tag; | |
25eb8461 | 436 | u32 eisa_id; |
1da177e4 LT |
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 */ | |
9dd78466 | 446 | if (p[0] & LARGE_TAG) { /* large tag */ |
1da177e4 LT |
447 | len = (p[2] << 8) | p[1]; |
448 | tag = p[0]; | |
9dd78466 | 449 | } else { /* small tag */ |
1da177e4 | 450 | len = p[0] & 0x07; |
9dd78466 | 451 | tag = ((p[0] >> 3) & 0x0f); |
1da177e4 LT |
452 | } |
453 | ||
454 | switch (tag) { | |
455 | ||
456 | case LARGE_TAG_ANSISTR: | |
9dd78466 BH |
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'; | |
1da177e4 LT |
461 | break; |
462 | ||
9dd78466 | 463 | case SMALL_TAG_COMPATDEVID: /* compatible ID */ |
1da177e4 LT |
464 | if (len != 4) |
465 | goto len_err; | |
25eb8461 BH |
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); | |
772defc6 BH |
468 | dev_id = pnp_add_id(dev, id); |
469 | if (!dev_id) | |
470 | return NULL; | |
1da177e4 LT |
471 | break; |
472 | ||
473 | case SMALL_TAG_END: | |
474 | p = p + 2; | |
9dd78466 | 475 | return (unsigned char *)p; |
1da177e4 LT |
476 | break; |
477 | ||
af901ca1 | 478 | default: /* an unknown tag */ |
1e0aa9ad | 479 | len_err: |
af11cb2d BH |
480 | dev_err(&dev->dev, "unknown tag %#x length %d\n", |
481 | tag, len); | |
1da177e4 LT |
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 | ||
af11cb2d | 492 | dev_err(&dev->dev, "no end tag in resource structure\n"); |
1da177e4 LT |
493 | |
494 | return NULL; | |
495 | } | |
496 | ||
1da177e4 LT |
497 | /* |
498 | * Allocated Resource Encoding | |
499 | */ | |
500 | ||
72dcc883 BH |
501 | static void pnpbios_encode_mem(struct pnp_dev *dev, unsigned char *p, |
502 | struct resource *res) | |
1da177e4 | 503 | { |
aee3ad81 BH |
504 | unsigned long base; |
505 | unsigned long len; | |
506 | ||
507 | if (pnp_resource_enabled(res)) { | |
508 | base = res->start; | |
28f65c11 | 509 | len = resource_size(res); |
aee3ad81 BH |
510 | } else { |
511 | base = 0; | |
512 | len = 0; | |
513 | } | |
07d4e9af | 514 | |
1da177e4 LT |
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; | |
72dcc883 | 521 | |
2f53432c | 522 | pnp_dbg(&dev->dev, " encode mem %#lx-%#lx\n", base, base + len - 1); |
1da177e4 LT |
523 | } |
524 | ||
72dcc883 BH |
525 | static void pnpbios_encode_mem32(struct pnp_dev *dev, unsigned char *p, |
526 | struct resource *res) | |
1da177e4 | 527 | { |
aee3ad81 BH |
528 | unsigned long base; |
529 | unsigned long len; | |
530 | ||
531 | if (pnp_resource_enabled(res)) { | |
532 | base = res->start; | |
28f65c11 | 533 | len = resource_size(res); |
aee3ad81 BH |
534 | } else { |
535 | base = 0; | |
536 | len = 0; | |
537 | } | |
07d4e9af | 538 | |
1da177e4 LT |
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; | |
72dcc883 | 551 | |
2f53432c | 552 | pnp_dbg(&dev->dev, " encode mem32 %#lx-%#lx\n", base, base + len - 1); |
1da177e4 LT |
553 | } |
554 | ||
72dcc883 BH |
555 | static void pnpbios_encode_fixed_mem32(struct pnp_dev *dev, unsigned char *p, |
556 | struct resource *res) | |
9dd78466 | 557 | { |
aee3ad81 BH |
558 | unsigned long base; |
559 | unsigned long len; | |
560 | ||
561 | if (pnp_resource_enabled(res)) { | |
562 | base = res->start; | |
28f65c11 | 563 | len = resource_size(res); |
aee3ad81 BH |
564 | } else { |
565 | base = 0; | |
566 | len = 0; | |
567 | } | |
07d4e9af | 568 | |
1da177e4 LT |
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; | |
72dcc883 | 577 | |
2f53432c | 578 | pnp_dbg(&dev->dev, " encode fixed_mem32 %#lx-%#lx\n", base, |
aee3ad81 | 579 | base + len - 1); |
1da177e4 LT |
580 | } |
581 | ||
72dcc883 BH |
582 | static void pnpbios_encode_irq(struct pnp_dev *dev, unsigned char *p, |
583 | struct resource *res) | |
1da177e4 | 584 | { |
aee3ad81 BH |
585 | unsigned long map; |
586 | ||
587 | if (pnp_resource_enabled(res)) | |
588 | map = 1 << res->start; | |
589 | else | |
590 | map = 0; | |
07d4e9af | 591 | |
1da177e4 LT |
592 | p[1] = map & 0xff; |
593 | p[2] = (map >> 8) & 0xff; | |
72dcc883 | 594 | |
2f53432c | 595 | pnp_dbg(&dev->dev, " encode irq mask %#lx\n", map); |
1da177e4 LT |
596 | } |
597 | ||
72dcc883 BH |
598 | static void pnpbios_encode_dma(struct pnp_dev *dev, unsigned char *p, |
599 | struct resource *res) | |
1da177e4 | 600 | { |
aee3ad81 BH |
601 | unsigned long map; |
602 | ||
603 | if (pnp_resource_enabled(res)) | |
604 | map = 1 << res->start; | |
605 | else | |
606 | map = 0; | |
07d4e9af | 607 | |
1da177e4 | 608 | p[1] = map & 0xff; |
72dcc883 | 609 | |
2f53432c | 610 | pnp_dbg(&dev->dev, " encode dma mask %#lx\n", map); |
1da177e4 LT |
611 | } |
612 | ||
72dcc883 BH |
613 | static void pnpbios_encode_port(struct pnp_dev *dev, unsigned char *p, |
614 | struct resource *res) | |
1da177e4 | 615 | { |
aee3ad81 BH |
616 | unsigned long base; |
617 | unsigned long len; | |
618 | ||
619 | if (pnp_resource_enabled(res)) { | |
620 | base = res->start; | |
28f65c11 | 621 | len = resource_size(res); |
aee3ad81 BH |
622 | } else { |
623 | base = 0; | |
624 | len = 0; | |
625 | } | |
07d4e9af | 626 | |
1da177e4 LT |
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; | |
72dcc883 | 632 | |
2f53432c | 633 | pnp_dbg(&dev->dev, " encode io %#lx-%#lx\n", base, base + len - 1); |
1da177e4 LT |
634 | } |
635 | ||
72dcc883 BH |
636 | static void pnpbios_encode_fixed_port(struct pnp_dev *dev, unsigned char *p, |
637 | struct resource *res) | |
1da177e4 LT |
638 | { |
639 | unsigned long base = res->start; | |
28f65c11 | 640 | unsigned long len = resource_size(res); |
07d4e9af | 641 | |
aee3ad81 BH |
642 | if (pnp_resource_enabled(res)) { |
643 | base = res->start; | |
28f65c11 | 644 | len = resource_size(res); |
aee3ad81 BH |
645 | } else { |
646 | base = 0; | |
647 | len = 0; | |
648 | } | |
649 | ||
1da177e4 LT |
650 | p[1] = base & 0xff; |
651 | p[2] = (base >> 8) & 0xff; | |
652 | p[3] = len & 0xff; | |
72dcc883 | 653 | |
2f53432c | 654 | pnp_dbg(&dev->dev, " encode fixed_io %#lx-%#lx\n", base, |
aee3ad81 | 655 | base + len - 1); |
1da177e4 LT |
656 | } |
657 | ||
4ab55d8d BH |
658 | static unsigned char *pnpbios_encode_allocated_resource_data(struct pnp_dev |
659 | *dev, | |
660 | unsigned char *p, | |
661 | unsigned char *end) | |
1da177e4 LT |
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 */ | |
9dd78466 | 672 | if (p[0] & LARGE_TAG) { /* large tag */ |
1da177e4 LT |
673 | len = (p[2] << 8) | p[1]; |
674 | tag = p[0]; | |
9dd78466 | 675 | } else { /* small tag */ |
1da177e4 | 676 | len = p[0] & 0x07; |
9dd78466 | 677 | tag = ((p[0] >> 3) & 0x0f); |
1da177e4 LT |
678 | } |
679 | ||
680 | switch (tag) { | |
681 | ||
682 | case LARGE_TAG_MEM: | |
683 | if (len != 9) | |
684 | goto len_err; | |
7e2cf31f BH |
685 | pnpbios_encode_mem(dev, p, |
686 | pnp_get_resource(dev, IORESOURCE_MEM, mem)); | |
1da177e4 LT |
687 | mem++; |
688 | break; | |
689 | ||
690 | case LARGE_TAG_MEM32: | |
691 | if (len != 17) | |
692 | goto len_err; | |
7e2cf31f BH |
693 | pnpbios_encode_mem32(dev, p, |
694 | pnp_get_resource(dev, IORESOURCE_MEM, mem)); | |
1da177e4 LT |
695 | mem++; |
696 | break; | |
697 | ||
698 | case LARGE_TAG_FIXEDMEM32: | |
699 | if (len != 9) | |
700 | goto len_err; | |
7e2cf31f BH |
701 | pnpbios_encode_fixed_mem32(dev, p, |
702 | pnp_get_resource(dev, IORESOURCE_MEM, mem)); | |
1da177e4 LT |
703 | mem++; |
704 | break; | |
705 | ||
706 | case SMALL_TAG_IRQ: | |
707 | if (len < 2 || len > 3) | |
708 | goto len_err; | |
7e2cf31f BH |
709 | pnpbios_encode_irq(dev, p, |
710 | pnp_get_resource(dev, IORESOURCE_IRQ, irq)); | |
1da177e4 LT |
711 | irq++; |
712 | break; | |
713 | ||
714 | case SMALL_TAG_DMA: | |
715 | if (len != 2) | |
716 | goto len_err; | |
7e2cf31f BH |
717 | pnpbios_encode_dma(dev, p, |
718 | pnp_get_resource(dev, IORESOURCE_DMA, dma)); | |
1da177e4 LT |
719 | dma++; |
720 | break; | |
721 | ||
722 | case SMALL_TAG_PORT: | |
723 | if (len != 7) | |
724 | goto len_err; | |
7e2cf31f BH |
725 | pnpbios_encode_port(dev, p, |
726 | pnp_get_resource(dev, IORESOURCE_IO, port)); | |
1da177e4 LT |
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; | |
7e2cf31f BH |
737 | pnpbios_encode_fixed_port(dev, p, |
738 | pnp_get_resource(dev, IORESOURCE_IO, port)); | |
1da177e4 LT |
739 | port++; |
740 | break; | |
741 | ||
742 | case SMALL_TAG_END: | |
743 | p = p + 2; | |
9dd78466 | 744 | return (unsigned char *)p; |
1da177e4 LT |
745 | break; |
746 | ||
af901ca1 | 747 | default: /* an unknown tag */ |
1e0aa9ad | 748 | len_err: |
af11cb2d BH |
749 | dev_err(&dev->dev, "unknown tag %#x length %d\n", |
750 | tag, len); | |
1da177e4 LT |
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 | ||
af11cb2d | 761 | dev_err(&dev->dev, "no end tag in resource structure\n"); |
1da177e4 LT |
762 | |
763 | return NULL; | |
764 | } | |
765 | ||
1da177e4 LT |
766 | /* |
767 | * Core Parsing Functions | |
768 | */ | |
769 | ||
2bb9a6b3 TR |
770 | int __init pnpbios_parse_data_stream(struct pnp_dev *dev, |
771 | struct pnp_bios_node *node) | |
1da177e4 | 772 | { |
9dd78466 BH |
773 | unsigned char *p = (char *)node->data; |
774 | unsigned char *end = (char *)(node->data + node->size); | |
07d4e9af | 775 | |
4ab55d8d | 776 | p = pnpbios_parse_allocated_resource_data(dev, p, end); |
1da177e4 LT |
777 | if (!p) |
778 | return -EIO; | |
9dd78466 | 779 | p = pnpbios_parse_resource_option_data(p, end, dev); |
1da177e4 LT |
780 | if (!p) |
781 | return -EIO; | |
9dd78466 | 782 | p = pnpbios_parse_compatible_ids(p, end, dev); |
1da177e4 LT |
783 | if (!p) |
784 | return -EIO; | |
785 | return 0; | |
786 | } | |
787 | ||
4ab55d8d | 788 | int pnpbios_read_resources_from_node(struct pnp_dev *dev, |
07d4e9af | 789 | struct pnp_bios_node *node) |
1da177e4 | 790 | { |
9dd78466 BH |
791 | unsigned char *p = (char *)node->data; |
792 | unsigned char *end = (char *)(node->data + node->size); | |
07d4e9af | 793 | |
4ab55d8d | 794 | p = pnpbios_parse_allocated_resource_data(dev, p, end); |
1da177e4 LT |
795 | if (!p) |
796 | return -EIO; | |
797 | return 0; | |
798 | } | |
799 | ||
4ab55d8d | 800 | int pnpbios_write_resources_to_node(struct pnp_dev *dev, |
07d4e9af | 801 | struct pnp_bios_node *node) |
1da177e4 | 802 | { |
9dd78466 BH |
803 | unsigned char *p = (char *)node->data; |
804 | unsigned char *end = (char *)(node->data + node->size); | |
07d4e9af | 805 | |
4ab55d8d | 806 | p = pnpbios_encode_allocated_resource_data(dev, p, end); |
1da177e4 LT |
807 | if (!p) |
808 | return -EIO; | |
809 | return 0; | |
810 | } |