1 /*- 2 * Copyright (c) 1999 Doug Rabson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/sys/isa/pnpparse.c,v 1.14 2003/06/11 00:32:45 obrien Exp $ 27 * $DragonFly: src/sys/bus/isa/pnpparse.c,v 1.5 2003/11/09 02:22:33 dillon Exp $ 28 */ 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/malloc.h> 33 #include <sys/module.h> 34 #include <sys/bus.h> 35 36 #include <machine/stdarg.h> 37 38 #include "isavar.h" 39 #include "pnpreg.h" 40 #include "pnpvar.h" 41 42 #define MAXDEP 8 43 44 #define I16(p) ((p)[0] + ((p)[1] << 8)) 45 #define I32(p) (I16(p) + (I16((p)+2) << 16)) 46 47 void 48 pnp_printf(u_int32_t id, char *fmt, ...) 49 { 50 __va_list ap; 51 52 __va_start(ap, fmt); 53 printf("%s: ", pnp_eisaformat(id)); 54 vprintf(fmt, ap); 55 __va_end(ap); 56 } 57 58 /* parse a single descriptor */ 59 60 static int 61 pnp_parse_desc(device_t dev, u_char tag, u_char *res, int len, 62 struct isa_config *config, int ldn) 63 { 64 char buf[100]; 65 u_int32_t id; 66 u_int32_t compat_id; 67 int temp; 68 69 id = isa_get_logicalid(dev); 70 71 if (PNP_RES_TYPE(tag) == 0) { 72 73 /* Small resource */ 74 switch (PNP_SRES_NUM(tag)) { 75 76 case PNP_TAG_VERSION: 77 case PNP_TAG_VENDOR: 78 /* these descriptors are quietly ignored */ 79 break; 80 81 case PNP_TAG_LOGICAL_DEVICE: 82 case PNP_TAG_START_DEPENDANT: 83 case PNP_TAG_END_DEPENDANT: 84 if (bootverbose) 85 pnp_printf(id, "unexpected small tag %d\n", 86 PNP_SRES_NUM(tag)); 87 /* shouldn't happen; quit now */ 88 return (1); 89 90 case PNP_TAG_COMPAT_DEVICE: 91 /* 92 * Got a compatible device id resource. 93 * Should keep a list of compat ids in the device. 94 */ 95 bcopy(res, &compat_id, 4); 96 if (isa_get_compatid(dev) == 0) 97 isa_set_compatid(dev, compat_id); 98 break; 99 100 case PNP_TAG_IRQ_FORMAT: 101 if (config->ic_nirq == ISA_NIRQ) { 102 pnp_printf(id, "too many irqs\n"); 103 return (1); 104 } 105 if (I16(res) == 0) { 106 /* a null descriptor */ 107 config->ic_irqmask[config->ic_nirq] = 0; 108 config->ic_nirq++; 109 break; 110 } 111 if (bootverbose) 112 pnp_printf(id, "adding irq mask %#02x\n", 113 I16(res)); 114 config->ic_irqmask[config->ic_nirq] = I16(res); 115 config->ic_nirq++; 116 break; 117 118 case PNP_TAG_DMA_FORMAT: 119 if (config->ic_ndrq == ISA_NDRQ) { 120 pnp_printf(id, "too many drqs\n"); 121 return (1); 122 } 123 if (res[0] == 0) { 124 /* a null descriptor */ 125 config->ic_drqmask[config->ic_ndrq] = 0; 126 config->ic_ndrq++; 127 break; 128 } 129 if (bootverbose) 130 pnp_printf(id, "adding dma mask %#02x\n", 131 res[0]); 132 config->ic_drqmask[config->ic_ndrq] = res[0]; 133 config->ic_ndrq++; 134 break; 135 136 case PNP_TAG_IO_RANGE: 137 if (config->ic_nport == ISA_NPORT) { 138 pnp_printf(id, "too many ports\n"); 139 return (1); 140 } 141 if (res[6] == 0) { 142 /* a null descriptor */ 143 config->ic_port[config->ic_nport].ir_start = 0; 144 config->ic_port[config->ic_nport].ir_end = 0; 145 config->ic_port[config->ic_nport].ir_size = 0; 146 config->ic_port[config->ic_nport].ir_align = 0; 147 config->ic_nport++; 148 break; 149 } 150 if (bootverbose) { 151 pnp_printf(id, "adding io range " 152 "%#x-%#x, size=%#x, " 153 "align=%#x\n", 154 I16(res + 1), 155 I16(res + 3) + res[6]-1, 156 res[6], res[5]); 157 } 158 config->ic_port[config->ic_nport].ir_start = 159 I16(res + 1); 160 config->ic_port[config->ic_nport].ir_end = 161 I16(res + 3) + res[6] - 1; 162 config->ic_port[config->ic_nport].ir_size = res[6]; 163 if (res[5] == 0) { 164 /* Make sure align is at least one */ 165 res[5] = 1; 166 } 167 config->ic_port[config->ic_nport].ir_align = res[5]; 168 config->ic_nport++; 169 pnp_check_quirks(isa_get_vendorid(dev), 170 isa_get_logicalid(dev), ldn, config); 171 break; 172 173 case PNP_TAG_IO_FIXED: 174 if (config->ic_nport == ISA_NPORT) { 175 pnp_printf(id, "too many ports\n"); 176 return (1); 177 } 178 if (res[2] == 0) { 179 /* a null descriptor */ 180 config->ic_port[config->ic_nport].ir_start = 0; 181 config->ic_port[config->ic_nport].ir_end = 0; 182 config->ic_port[config->ic_nport].ir_size = 0; 183 config->ic_port[config->ic_nport].ir_align = 0; 184 config->ic_nport++; 185 break; 186 } 187 if (bootverbose) { 188 pnp_printf(id, "adding fixed io range " 189 "%#x-%#x, size=%#x, " 190 "align=%#x\n", 191 I16(res), 192 I16(res) + res[2] - 1, 193 res[2], 1); 194 } 195 config->ic_port[config->ic_nport].ir_start = I16(res); 196 config->ic_port[config->ic_nport].ir_end = 197 I16(res) + res[2] - 1; 198 config->ic_port[config->ic_nport].ir_size = res[2]; 199 config->ic_port[config->ic_nport].ir_align = 1; 200 config->ic_nport++; 201 break; 202 203 case PNP_TAG_END: 204 if (bootverbose) 205 pnp_printf(id, "end config\n"); 206 return (1); 207 208 default: 209 /* Skip this resource */ 210 pnp_printf(id, "unexpected small tag %d\n", 211 PNP_SRES_NUM(tag)); 212 break; 213 } 214 } else { 215 /* Large resource */ 216 switch (PNP_LRES_NUM(tag)) { 217 218 case PNP_TAG_ID_UNICODE: 219 case PNP_TAG_LARGE_VENDOR: 220 /* these descriptors are quietly ignored */ 221 break; 222 223 case PNP_TAG_ID_ANSI: 224 if (len > sizeof(buf) - 1) 225 len = sizeof(buf) - 1; 226 bcopy(res, buf, len); 227 228 /* 229 * Trim trailing spaces and garbage. 230 */ 231 while (len > 0 && buf[len - 1] <= ' ') 232 len--; 233 buf[len] = '\0'; 234 device_set_desc_copy(dev, buf); 235 break; 236 237 case PNP_TAG_MEMORY_RANGE: 238 if (config->ic_nmem == ISA_NMEM) { 239 pnp_printf(id, "too many memory ranges\n"); 240 return (1); 241 } 242 if (I16(res + 7) == 0) { 243 /* a null descriptor */ 244 config->ic_mem[config->ic_nmem].ir_start = 0; 245 config->ic_mem[config->ic_nmem].ir_end = 0; 246 config->ic_mem[config->ic_nmem].ir_size = 0; 247 config->ic_mem[config->ic_nmem].ir_align = 0; 248 config->ic_nmem++; 249 break; 250 } 251 if (bootverbose) { 252 temp = I16(res + 7) << 8; 253 pnp_printf(id, "adding memory range " 254 "%#x-%#x, size=%#x, " 255 "align=%#x\n", 256 I16(res + 1) << 8, 257 (I16(res + 3) << 8) + temp - 1, 258 temp, I16(res + 5)); 259 } 260 config->ic_mem[config->ic_nmem].ir_start = 261 I16(res + 1) << 8; 262 config->ic_mem[config->ic_nmem].ir_end = 263 (I16(res + 3) << 8) + (I16(res + 7) << 8) - 1; 264 config->ic_mem[config->ic_nmem].ir_size = 265 I16(res + 7) << 8; 266 config->ic_mem[config->ic_nmem].ir_align = I16(res + 5); 267 if (!config->ic_mem[config->ic_nmem].ir_align) 268 config->ic_mem[config->ic_nmem].ir_align = 269 0x10000; 270 config->ic_nmem++; 271 break; 272 273 case PNP_TAG_MEMORY32_RANGE: 274 if (config->ic_nmem == ISA_NMEM) { 275 pnp_printf(id, "too many memory ranges\n"); 276 return (1); 277 } 278 if (I32(res + 13) == 0) { 279 /* a null descriptor */ 280 config->ic_mem[config->ic_nmem].ir_start = 0; 281 config->ic_mem[config->ic_nmem].ir_end = 0; 282 config->ic_mem[config->ic_nmem].ir_size = 0; 283 config->ic_mem[config->ic_nmem].ir_align = 0; 284 config->ic_nmem++; 285 break; 286 } 287 if (bootverbose) { 288 pnp_printf(id, "adding memory32 range " 289 "%#x-%#x, size=%#x, " 290 "align=%#x\n", 291 I32(res + 1), 292 I32(res + 5) + I32(res + 13) - 1, 293 I32(res + 13), I32(res + 9)); 294 } 295 config->ic_mem[config->ic_nmem].ir_start = I32(res + 1); 296 config->ic_mem[config->ic_nmem].ir_end = 297 I32(res + 5) + I32(res + 13) - 1; 298 config->ic_mem[config->ic_nmem].ir_size = I32(res + 13); 299 config->ic_mem[config->ic_nmem].ir_align = I32(res + 9); 300 config->ic_nmem++; 301 break; 302 303 case PNP_TAG_MEMORY32_FIXED: 304 if (config->ic_nmem == ISA_NMEM) { 305 pnp_printf(id, "too many memory ranges\n"); 306 return (1); 307 } 308 if (I32(res + 5) == 0) { 309 /* a null descriptor */ 310 config->ic_mem[config->ic_nmem].ir_start = 0; 311 config->ic_mem[config->ic_nmem].ir_end = 0; 312 config->ic_mem[config->ic_nmem].ir_size = 0; 313 config->ic_mem[config->ic_nmem].ir_align = 0; 314 break; 315 } 316 if (bootverbose) { 317 pnp_printf(id, "adding fixed memory32 range " 318 "%#x-%#x, size=%#x\n", 319 I32(res + 1), 320 I32(res + 1) + I32(res + 5) - 1, 321 I32(res + 5)); 322 } 323 config->ic_mem[config->ic_nmem].ir_start = I32(res + 1); 324 config->ic_mem[config->ic_nmem].ir_end = 325 I32(res + 1) + I32(res + 5) - 1; 326 config->ic_mem[config->ic_nmem].ir_size = I32(res + 5); 327 config->ic_mem[config->ic_nmem].ir_align = 1; 328 config->ic_nmem++; 329 break; 330 331 default: 332 /* Skip this resource */ 333 pnp_printf(id, "unexpected large tag %d\n", 334 PNP_SRES_NUM(tag)); 335 break; 336 } 337 } 338 339 return (0); 340 } 341 342 /* 343 * Parse a single "dependent" resource combination. 344 */ 345 346 u_char * 347 pnp_parse_dependant(device_t dev, u_char *resources, int len, 348 struct isa_config *config, int ldn) 349 { 350 u_char *res; 351 352 res = pnp_scan_resources(dev, resources, len, config, 353 ldn, pnp_parse_desc); 354 return(res); 355 } 356 357 static void 358 pnp_merge_resources(device_t dev, struct isa_config *from, 359 struct isa_config *to) 360 { 361 device_t parent; 362 int i; 363 364 parent = device_get_parent(dev); 365 for (i = 0; i < from->ic_nmem; i++) { 366 if (to->ic_nmem == ISA_NMEM) { 367 device_printf(parent, "too many memory ranges\n"); 368 return; 369 } 370 to->ic_mem[to->ic_nmem] = from->ic_mem[i]; 371 to->ic_nmem++; 372 } 373 for (i = 0; i < from->ic_nport; i++) { 374 if (to->ic_nport == ISA_NPORT) { 375 device_printf(parent, "too many port ranges\n"); 376 return; 377 } 378 to->ic_port[to->ic_nport] = from->ic_port[i]; 379 to->ic_nport++; 380 } 381 for (i = 0; i < from->ic_nirq; i++) { 382 if (to->ic_nirq == ISA_NIRQ) { 383 device_printf(parent, "too many irq ranges\n"); 384 return; 385 } 386 to->ic_irqmask[to->ic_nirq] = from->ic_irqmask[i]; 387 to->ic_nirq++; 388 } 389 for (i = 0; i < from->ic_ndrq; i++) { 390 if (to->ic_ndrq == ISA_NDRQ) { 391 device_printf(parent, "too many drq ranges\n"); 392 return; 393 } 394 to->ic_drqmask[to->ic_ndrq] = from->ic_drqmask[i]; 395 to->ic_ndrq++; 396 } 397 } 398 399 /* 400 * Parse resource data for Logical Devices, make a list of available 401 * resource configurations, and add them to the device. 402 * 403 * This function exits as soon as it gets an error reading *ANY* 404 * Resource Data or it reaches the end of Resource Data. 405 */ 406 407 void 408 pnp_parse_resources(device_t dev, u_char *resources, int len, int ldn) 409 { 410 struct isa_config *configs; 411 struct isa_config *config; 412 device_t parent; 413 int priorities[1 + MAXDEP]; 414 u_char *start; 415 u_char *p; 416 u_char tag; 417 u_int32_t id; 418 int ncfgs; 419 int l; 420 int i; 421 422 parent = device_get_parent(dev); 423 id = isa_get_logicalid(dev); 424 425 configs = (struct isa_config *)malloc(sizeof(*configs)*(1 + MAXDEP), 426 M_DEVBUF, M_NOWAIT | M_ZERO); 427 if (configs == NULL) { 428 device_printf(parent, "No memory to parse PNP data\n"); 429 return; 430 } 431 config = &configs[0]; 432 priorities[0] = 0; 433 ncfgs = 1; 434 435 p = resources; 436 start = NULL; 437 while (len > 0) { 438 tag = *p++; 439 len--; 440 if (PNP_RES_TYPE(tag) == 0) { 441 /* Small resource */ 442 l = PNP_SRES_LEN(tag); 443 if (len < l) { 444 len = 0; 445 continue; 446 } 447 len -= l; 448 449 switch (PNP_SRES_NUM(tag)) { 450 451 case PNP_TAG_START_DEPENDANT: 452 if (start != NULL) { 453 /* 454 * Copy the common resources first, 455 * then parse the "dependent" resources. 456 */ 457 pnp_merge_resources(dev, &configs[0], 458 config); 459 pnp_parse_dependant(dev, start, 460 p - start - 1, 461 config, ldn); 462 } 463 start = p + l; 464 if (ncfgs > MAXDEP) { 465 device_printf(parent, "too many dependant configs (%d)\n", MAXDEP); 466 len = 0; 467 break; 468 } 469 config = &configs[ncfgs]; 470 /* 471 * If the priority is not specified, 472 * then use the default of 'acceptable' 473 */ 474 if (l > 0) 475 priorities[ncfgs] = p[0]; 476 else 477 priorities[ncfgs] = 1; 478 if (bootverbose) 479 pnp_printf(id, "start dependent (%d)\n", 480 priorities[ncfgs]); 481 ncfgs++; 482 break; 483 484 case PNP_TAG_END_DEPENDANT: 485 if (start == NULL) { 486 device_printf(parent, 487 "malformed resources\n"); 488 len = 0; 489 break; 490 } 491 /* 492 * Copy the common resources first, 493 * then parse the "dependent" resources. 494 */ 495 pnp_merge_resources(dev, &configs[0], config); 496 pnp_parse_dependant(dev, start, p - start - 1, 497 config, ldn); 498 start = NULL; 499 if (bootverbose) 500 pnp_printf(id, "end dependent\n"); 501 /* 502 * Back to the common part; clear it 503 * as its contents has already been copied 504 * to each dependant. 505 */ 506 config = &configs[0]; 507 bzero(config, sizeof(*config)); 508 break; 509 510 case PNP_TAG_END: 511 if (start != NULL) { 512 device_printf(parent, 513 "malformed resources\n"); 514 } 515 len = 0; 516 break; 517 518 default: 519 if (start != NULL) 520 /* defer parsing a dependent section */ 521 break; 522 if (pnp_parse_desc(dev, tag, p, l, config, ldn)) 523 len = 0; 524 break; 525 } 526 p += l; 527 } else { 528 /* Large resource */ 529 if (len < 2) { 530 len = 0; 531 break; 532 } 533 l = I16(p); 534 p += 2; 535 len -= 2; 536 if (len < l) { 537 len = 0; 538 break; 539 } 540 len -= l; 541 if (start == NULL && 542 pnp_parse_desc(dev, tag, p, l, config, ldn)) { 543 len = 0; 544 break; 545 } 546 p += l; 547 } 548 } 549 550 if (ncfgs == 1) { 551 /* Single config without dependants */ 552 ISA_ADD_CONFIG(parent, dev, priorities[0], &configs[0]); 553 free(configs, M_DEVBUF); 554 return; 555 } 556 557 for (i = 1; i < ncfgs; i++) { 558 /* 559 * Merge the remaining part of the common resources, 560 * if any. Strictly speaking, there shouldn't be common/main 561 * resources after the END_DEPENDENT tag. 562 */ 563 pnp_merge_resources(dev, &configs[0], &configs[i]); 564 ISA_ADD_CONFIG(parent, dev, priorities[i], &configs[i]); 565 } 566 567 free(configs, M_DEVBUF); 568 } 569 570 u_char * 571 pnp_scan_resources(device_t dev, u_char *resources, int len, 572 struct isa_config *config, int ldn, pnp_scan_cb *cb) 573 { 574 u_char *p; 575 u_char tag; 576 int l; 577 578 p = resources; 579 while (len > 0) { 580 tag = *p++; 581 len--; 582 if (PNP_RES_TYPE(tag) == 0) { 583 /* small resource */ 584 l = PNP_SRES_LEN(tag); 585 if (len < l) 586 break; 587 if ((*cb)(dev, tag, p, l, config, ldn)) 588 return (p + l); 589 if (PNP_SRES_NUM(tag) == PNP_TAG_END) 590 return (p + l); 591 } else { 592 /* large resource */ 593 if (len < 2) 594 break; 595 l = I16(p); 596 p += 2; 597 len -= 2; 598 if (len < l) 599 break; 600 if ((*cb)(dev, tag, p, l, config, ldn)) 601 return (p + l); 602 } 603 p += l; 604 len -= l; 605 } 606 return NULL; 607 } 608