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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 | /* * rsparser.c - parses and encodes pnpbios resource data streams * */ #include <linux/config.h> #include <linux/ctype.h> #include <linux/pnp.h> #include <linux/pnpbios.h> #include <linux/string.h> #include <linux/slab.h> #ifdef CONFIG_PCI #include <linux/pci.h> #else inline void pcibios_penalize_isa_irq(int irq, int active) {} #endif /* CONFIG_PCI */ #include "pnpbios.h" /* standard resource tags */ #define SMALL_TAG_PNPVERNO 0x01 #define SMALL_TAG_LOGDEVID 0x02 #define SMALL_TAG_COMPATDEVID 0x03 #define SMALL_TAG_IRQ 0x04 #define SMALL_TAG_DMA 0x05 #define SMALL_TAG_STARTDEP 0x06 #define SMALL_TAG_ENDDEP 0x07 #define SMALL_TAG_PORT 0x08 #define SMALL_TAG_FIXEDPORT 0x09 #define SMALL_TAG_VENDOR 0x0e #define SMALL_TAG_END 0x0f #define LARGE_TAG 0x80 #define LARGE_TAG_MEM 0x81 #define LARGE_TAG_ANSISTR 0x82 #define LARGE_TAG_UNICODESTR 0x83 #define LARGE_TAG_VENDOR 0x84 #define LARGE_TAG_MEM32 0x85 #define LARGE_TAG_FIXEDMEM32 0x86 /* * Resource Data Stream Format: * * Allocated Resources (required) * end tag -> * Resource Configuration Options (optional) * end tag -> * Compitable Device IDs (optional) * final end tag -> */ /* * Allocated Resources */ static void pnpbios_parse_allocated_irqresource(struct pnp_resource_table * res, int irq) { int i = 0; while (!(res->irq_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_IRQ) i++; if (i < PNP_MAX_IRQ) { res->irq_resource[i].flags = IORESOURCE_IRQ; // Also clears _UNSET flag if (irq == -1) { res->irq_resource[i].flags |= IORESOURCE_DISABLED; return; } res->irq_resource[i].start = res->irq_resource[i].end = (unsigned long) irq; pcibios_penalize_isa_irq(irq, 1); } } static void pnpbios_parse_allocated_dmaresource(struct pnp_resource_table * res, int dma) { int i = 0; while (i < PNP_MAX_DMA && !(res->dma_resource[i].flags & IORESOURCE_UNSET)) i++; if (i < PNP_MAX_DMA) { res->dma_resource[i].flags = IORESOURCE_DMA; // Also clears _UNSET flag if (dma == -1) { res->dma_resource[i].flags |= IORESOURCE_DISABLED; return; } res->dma_resource[i].start = res->dma_resource[i].end = (unsigned long) dma; } } static void pnpbios_parse_allocated_ioresource(struct pnp_resource_table * res, int io, int len) { int i = 0; while (!(res->port_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_PORT) i++; if (i < PNP_MAX_PORT) { res->port_resource[i].flags = IORESOURCE_IO; // Also clears _UNSET flag if (len <= 0 || (io + len -1) >= 0x10003) { res->port_resource[i].flags |= IORESOURCE_DISABLED; return; } res->port_resource[i].start = (unsigned long) io; res->port_resource[i].end = (unsigned long)(io + len - 1); } } static void pnpbios_parse_allocated_memresource(struct pnp_resource_table * res, int mem, int len) { int i = 0; while (!(res->mem_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_MEM) i++; if (i < PNP_MAX_MEM) { res->mem_resource[i].flags = IORESOURCE_MEM; // Also clears _UNSET flag if (len <= 0) { res->mem_resource[i].flags |= IORESOURCE_DISABLED; return; } res->mem_resource[i].start = (unsigned long) mem; res->mem_resource[i].end = (unsigned long)(mem + len - 1); } } static unsigned char * pnpbios_parse_allocated_resource_data(unsigned char * p, unsigned char * end, struct pnp_resource_table * res) { unsigned int len, tag; int io, size, mask, i; if (!p) return NULL; /* Blank the resource table values */ pnp_init_resource_table(res); while ((char *)p < (char *)end) { /* determine the type of tag */ if (p[0] & LARGE_TAG) { /* large tag */ len = (p[2] << 8) | p[1]; tag = p[0]; } else { /* small tag */ len = p[0] & 0x07; tag = ((p[0]>>3) & 0x0f); } switch (tag) { case LARGE_TAG_MEM: if (len != 9) goto len_err; io = *(short *) &p[4]; size = *(short *) &p[10]; pnpbios_parse_allocated_memresource(res, io, size); break; case LARGE_TAG_ANSISTR: /* ignore this for now */ break; case LARGE_TAG_VENDOR: /* do nothing */ break; case LARGE_TAG_MEM32: if (len != 17) goto len_err; io = *(int *) &p[4]; size = *(int *) &p[16]; pnpbios_parse_allocated_memresource(res, io, size); break; case LARGE_TAG_FIXEDMEM32: if (len != 9) goto len_err; io = *(int *) &p[4]; size = *(int *) &p[8]; pnpbios_parse_allocated_memresource(res, io, size); break; case SMALL_TAG_IRQ: if (len < 2 || len > 3) goto len_err; io = -1; mask= p[1] + p[2]*256; for (i=0;i<16;i++, mask=mask>>1) if(mask & 0x01) io=i; pnpbios_parse_allocated_irqresource(res, io); break; case SMALL_TAG_DMA: if (len != 2) goto len_err; io = -1; mask = p[1]; for (i=0;i<8;i++, mask = mask>>1) if(mask & 0x01) io=i; pnpbios_parse_allocated_dmaresource(res, io); break; case SMALL_TAG_PORT: if (len != 7) goto len_err; io = p[2] + p[3] *256; size = p[7]; pnpbios_parse_allocated_ioresource(res, io, size); break; case SMALL_TAG_VENDOR: /* do nothing */ break; case SMALL_TAG_FIXEDPORT: if (len != 3) goto len_err; io = p[1] + p[2] * 256; size = p[3]; pnpbios_parse_allocated_ioresource(res, io, size); break; case SMALL_TAG_END: p = p + 2; return (unsigned char *)p; break; default: /* an unkown tag */ len_err: printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len); break; } /* continue to the next tag */ if (p[0] & LARGE_TAG) p += len + 3; else p += len + 1; } printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n"); return NULL; } /* * Resource Configuration Options */ static void pnpbios_parse_mem_option(unsigned char *p, int size, struct pnp_option *option) { struct pnp_mem * mem; mem = kcalloc(1, sizeof(struct pnp_mem), GFP_KERNEL); if (!mem) return; mem->min = ((p[5] << 8) | p[4]) << 8; mem->max = ((p[7] << 8) | p[6]) << 8; mem->align = (p[9] << 8) | p[8]; mem->size = ((p[11] << 8) | p[10]) << 8; mem->flags = p[3]; pnp_register_mem_resource(option,mem); return; } static void pnpbios_parse_mem32_option(unsigned char *p, int size, struct pnp_option *option) { struct pnp_mem * mem; mem = kcalloc(1, sizeof(struct pnp_mem), GFP_KERNEL); if (!mem) return; mem->min = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4]; mem->max = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8]; mem->align = (p[15] << 24) | (p[14] << 16) | (p[13] << 8) | p[12]; mem->size = (p[19] << 24) | (p[18] << 16) | (p[17] << 8) | p[16]; mem->flags = p[3]; pnp_register_mem_resource(option,mem); return; } static void pnpbios_parse_fixed_mem32_option(unsigned char *p, int size, struct pnp_option *option) { struct pnp_mem * mem; mem = kcalloc(1, sizeof(struct pnp_mem), GFP_KERNEL); if (!mem) return; mem->min = mem->max = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4]; mem->size = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8]; mem->align = 0; mem->flags = p[3]; pnp_register_mem_resource(option,mem); return; } static void pnpbios_parse_irq_option(unsigned char *p, int size, struct pnp_option *option) { struct pnp_irq * irq; unsigned long bits; irq = kcalloc(1, sizeof(struct pnp_irq), GFP_KERNEL); if (!irq) return; bits = (p[2] << 8) | p[1]; bitmap_copy(irq->map, &bits, 16); if (size > 2) irq->flags = p[3]; else irq->flags = IORESOURCE_IRQ_HIGHEDGE; pnp_register_irq_resource(option,irq); return; } static void pnpbios_parse_dma_option(unsigned char *p, int size, struct pnp_option *option) { struct pnp_dma * dma; dma = kcalloc(1, sizeof(struct pnp_dma), GFP_KERNEL); if (!dma) return; dma->map = p[1]; dma->flags = p[2]; pnp_register_dma_resource(option,dma); return; } static void pnpbios_parse_port_option(unsigned char *p, int size, struct pnp_option *option) { struct pnp_port * port; port = kcalloc(1, sizeof(struct pnp_port), GFP_KERNEL); if (!port) return; port->min = (p[3] << 8) | p[2]; port->max = (p[5] << 8) | p[4]; port->align = p[6]; port->size = p[7]; port->flags = p[1] ? PNP_PORT_FLAG_16BITADDR : 0; pnp_register_port_resource(option,port); return; } static void pnpbios_parse_fixed_port_option(unsigned char *p, int size, struct pnp_option *option) { struct pnp_port * port; port = kcalloc(1, sizeof(struct pnp_port), GFP_KERNEL); if (!port) return; port->min = port->max = (p[2] << 8) | p[1]; port->size = p[3]; port->align = 0; port->flags = PNP_PORT_FLAG_FIXED; pnp_register_port_resource(option,port); return; } static unsigned char * pnpbios_parse_resource_option_data(unsigned char * p, unsigned char * end, struct pnp_dev *dev) { unsigned int len, tag; int priority = 0; struct pnp_option *option, *option_independent; if (!p) return NULL; option_independent = option = pnp_register_independent_option(dev); if (!option) return NULL; while ((char *)p < (char *)end) { /* determine the type of tag */ if (p[0] & LARGE_TAG) { /* large tag */ len = (p[2] << 8) | p[1]; tag = p[0]; } else { /* small tag */ len = p[0] & 0x07; tag = ((p[0]>>3) & 0x0f); } switch (tag) { case LARGE_TAG_MEM: if (len != 9) goto len_err; pnpbios_parse_mem_option(p, len, option); break; case LARGE_TAG_MEM32: if (len != 17) goto len_err; pnpbios_parse_mem32_option(p, len, option); break; case LARGE_TAG_FIXEDMEM32: if (len != 9) goto len_err; pnpbios_parse_fixed_mem32_option(p, len, option); break; case SMALL_TAG_IRQ: if (len < 2 || len > 3) goto len_err; pnpbios_parse_irq_option(p, len, option); break; case SMALL_TAG_DMA: if (len != 2) goto len_err; pnpbios_parse_dma_option(p, len, option); break; case SMALL_TAG_PORT: if (len != 7) goto len_err; pnpbios_parse_port_option(p, len, option); break; case SMALL_TAG_VENDOR: /* do nothing */ break; case SMALL_TAG_FIXEDPORT: if (len != 3) goto len_err; pnpbios_parse_fixed_port_option(p, len, option); break; case SMALL_TAG_STARTDEP: if (len > 1) goto len_err; priority = 0x100 | PNP_RES_PRIORITY_ACCEPTABLE; if (len > 0) priority = 0x100 | p[1]; option = pnp_register_dependent_option(dev, priority); if (!option) return NULL; break; case SMALL_TAG_ENDDEP: if (len != 0) goto len_err; if (option_independent == option) printk(KERN_WARNING "PnPBIOS: Missing SMALL_TAG_STARTDEP tag\n"); option = option_independent; break; case SMALL_TAG_END: return p + 2; default: /* an unkown tag */ len_err: printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len); break; } /* continue to the next tag */ if (p[0] & LARGE_TAG) p += len + 3; else p += len + 1; } printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n"); return NULL; } /* * Compatible Device IDs */ #define HEX(id,a) hex[((id)>>a) & 15] #define CHAR(id,a) (0x40 + (((id)>>a) & 31)) // void pnpid32_to_pnpid(u32 id, char *str) { const char *hex = "0123456789abcdef"; id = be32_to_cpu(id); str[0] = CHAR(id, 26); str[1] = CHAR(id, 21); str[2] = CHAR(id,16); str[3] = HEX(id, 12); str[4] = HEX(id, 8); str[5] = HEX(id, 4); str[6] = HEX(id, 0); str[7] = '\0'; return; } // #undef CHAR #undef HEX static unsigned char * pnpbios_parse_compatible_ids(unsigned char *p, unsigned char *end, struct pnp_dev *dev) { int len, tag; char id[8]; struct pnp_id *dev_id; if (!p) return NULL; while ((char *)p < (char *)end) { /* determine the type of tag */ if (p[0] & LARGE_TAG) { /* large tag */ len = (p[2] << 8) | p[1]; tag = p[0]; } else { /* small tag */ len = p[0] & 0x07; tag = ((p[0]>>3) & 0x0f); } switch (tag) { case LARGE_TAG_ANSISTR: strncpy(dev->name, p + 3, len >= PNP_NAME_LEN ? PNP_NAME_LEN - 2 : len); dev->name[len >= PNP_NAME_LEN ? PNP_NAME_LEN - 1 : len] = '\0'; break; case SMALL_TAG_COMPATDEVID: /* compatible ID */ if (len != 4) goto len_err; dev_id = kcalloc(1, sizeof (struct pnp_id), GFP_KERNEL); if (!dev_id) return NULL; memset(dev_id, 0, sizeof(struct pnp_id)); pnpid32_to_pnpid(p[1] | p[2] << 8 | p[3] << 16 | p[4] << 24,id); memcpy(&dev_id->id, id, 7); pnp_add_id(dev_id, dev); break; case SMALL_TAG_END: p = p + 2; return (unsigned char *)p; break; default: /* an unkown tag */ len_err: printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len); break; } /* continue to the next tag */ if (p[0] & LARGE_TAG) p += len + 3; else p += len + 1; } printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n"); return NULL; } /* * Allocated Resource Encoding */ static void pnpbios_encode_mem(unsigned char *p, struct resource * res) { unsigned long base = res->start; unsigned long len = res->end - res->start + 1; p[4] = (base >> 8) & 0xff; p[5] = ((base >> 8) >> 8) & 0xff; p[6] = (base >> 8) & 0xff; p[7] = ((base >> 8) >> 8) & 0xff; p[10] = (len >> 8) & 0xff; p[11] = ((len >> 8) >> 8) & 0xff; return; } static void pnpbios_encode_mem32(unsigned char *p, struct resource * res) { unsigned long base = res->start; unsigned long len = res->end - res->start + 1; p[4] = base & 0xff; p[5] = (base >> 8) & 0xff; p[6] = (base >> 16) & 0xff; p[7] = (base >> 24) & 0xff; p[8] = base & 0xff; p[9] = (base >> 8) & 0xff; p[10] = (base >> 16) & 0xff; p[11] = (base >> 24) & 0xff; p[16] = len & 0xff; p[17] = (len >> 8) & 0xff; p[18] = (len >> 16) & 0xff; p[19] = (len >> 24) & 0xff; return; } static void pnpbios_encode_fixed_mem32(unsigned char *p, struct resource * res) { unsigned long base = res->start; unsigned long len = res->end - res->start + 1; p[4] = base & 0xff; p[5] = (base >> 8) & 0xff; p[6] = (base >> 16) & 0xff; p[7] = (base >> 24) & 0xff; p[8] = len & 0xff; p[9] = (len >> 8) & 0xff; p[10] = (len >> 16) & 0xff; p[11] = (len >> 24) & 0xff; return; } static void pnpbios_encode_irq(unsigned char *p, struct resource * res) { unsigned long map = 0; map = 1 << res->start; p[1] = map & 0xff; p[2] = (map >> 8) & 0xff; return; } static void pnpbios_encode_dma(unsigned char *p, struct resource * res) { unsigned long map = 0; map = 1 << res->start; p[1] = map & 0xff; return; } static void pnpbios_encode_port(unsigned char *p, struct resource * res) { unsigned long base = res->start; unsigned long len = res->end - res->start + 1; p[2] = base & 0xff; p[3] = (base >> 8) & 0xff; p[4] = base & 0xff; p[5] = (base >> 8) & 0xff; p[7] = len & 0xff; return; } static void pnpbios_encode_fixed_port(unsigned char *p, struct resource * res) { unsigned long base = res->start; unsigned long len = res->end - res->start + 1; p[1] = base & 0xff; p[2] = (base >> 8) & 0xff; p[3] = len & 0xff; return; } static unsigned char * pnpbios_encode_allocated_resource_data(unsigned char * p, unsigned char * end, struct pnp_resource_table * res) { unsigned int len, tag; int port = 0, irq = 0, dma = 0, mem = 0; if (!p) return NULL; while ((char *)p < (char *)end) { /* determine the type of tag */ if (p[0] & LARGE_TAG) { /* large tag */ len = (p[2] << 8) | p[1]; tag = p[0]; } else { /* small tag */ len = p[0] & 0x07; tag = ((p[0]>>3) & 0x0f); } switch (tag) { case LARGE_TAG_MEM: if (len != 9) goto len_err; pnpbios_encode_mem(p, &res->mem_resource[mem]); mem++; break; case LARGE_TAG_MEM32: if (len != 17) goto len_err; pnpbios_encode_mem32(p, &res->mem_resource[mem]); mem++; break; case LARGE_TAG_FIXEDMEM32: if (len != 9) goto len_err; pnpbios_encode_fixed_mem32(p, &res->mem_resource[mem]); mem++; break; case SMALL_TAG_IRQ: if (len < 2 || len > 3) goto len_err; pnpbios_encode_irq(p, &res->irq_resource[irq]); irq++; break; case SMALL_TAG_DMA: if (len != 2) goto len_err; pnpbios_encode_dma(p, &res->dma_resource[dma]); dma++; break; case SMALL_TAG_PORT: if (len != 7) goto len_err; pnpbios_encode_port(p, &res->port_resource[port]); port++; break; case SMALL_TAG_VENDOR: /* do nothing */ break; case SMALL_TAG_FIXEDPORT: if (len != 3) goto len_err; pnpbios_encode_fixed_port(p, &res->port_resource[port]); port++; break; case SMALL_TAG_END: p = p + 2; return (unsigned char *)p; break; default: /* an unkown tag */ len_err: printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len); break; } /* continue to the next tag */ if (p[0] & LARGE_TAG) p += len + 3; else p += len + 1; } printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n"); return NULL; } /* * Core Parsing Functions */ int pnpbios_parse_data_stream(struct pnp_dev *dev, struct pnp_bios_node * node) { unsigned char * p = (char *)node->data; unsigned char * end = (char *)(node->data + node->size); p = pnpbios_parse_allocated_resource_data(p,end,&dev->res); if (!p) return -EIO; p = pnpbios_parse_resource_option_data(p,end,dev); if (!p) return -EIO; p = pnpbios_parse_compatible_ids(p,end,dev); if (!p) return -EIO; return 0; } int pnpbios_read_resources_from_node(struct pnp_resource_table *res, struct pnp_bios_node * node) { unsigned char * p = (char *)node->data; unsigned char * end = (char *)(node->data + node->size); p = pnpbios_parse_allocated_resource_data(p,end,res); if (!p) return -EIO; return 0; } int pnpbios_write_resources_to_node(struct pnp_resource_table *res, struct pnp_bios_node * node) { unsigned char * p = (char *)node->data; unsigned char * end = (char *)(node->data + node->size); p = pnpbios_encode_allocated_resource_data(p,end,res); if (!p) return -EIO; return 0; } |