Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/isa/pnp.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /* 2 * Copyright (c) 1996, Sujal M. Patel 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 * $FreeBSD$ 27 * from: pnp.c,v 1.11 1999/05/06 22:11:19 peter Exp 28 */ 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/kernel.h> 33 #include <sys/module.h> 34 #include <sys/bus.h> 35 #include <sys/malloc.h> 36 #include <isa/isavar.h> 37 #include <isa/pnpreg.h> 38 #include <isa/pnpvar.h> 39 #include <machine/clock.h> 40 41 typedef struct _pnp_id { 42 u_int32_t vendor_id; 43 u_int32_t serial; 44 u_char checksum; 45 } pnp_id; 46 47 struct pnp_set_config_arg { 48 int csn; /* Card number to configure */ 49 int ldn; /* Logical device on card */ 50 }; 51 52 struct pnp_quirk { 53 u_int32_t vendor_id; /* Vendor of the card */ 54 u_int32_t logical_id; /* ID of the device with quirk */ 55 int type; 56 #define PNP_QUIRK_WRITE_REG 1 /* Need to write a pnp register */ 57 int arg1; 58 int arg2; 59 }; 60 61 struct pnp_quirk pnp_quirks[] = { 62 /* 63 * The Gravis UltraSound needs register 0xf2 to be set to 0xff 64 * to enable power. 65 * XXX need to know the logical device id. 66 */ 67 { 0x0100561e /* GRV0001 */, 0, 68 PNP_QUIRK_WRITE_REG, 0xf2, 0xff }, 69 70 { 0 } 71 }; 72 73 #ifdef PC98 74 /* Some NEC PnP cards have 9 bytes serial code. */ 75 static pnp_id necids[] = { 76 {0x4180a3b8, 0xffffffff, 0x00}, /* PC-9801CB-B04 (NEC8041) */ 77 {0x5181a3b8, 0xffffffff, 0x46}, /* PC-9821CB2-B04(NEC8151) */ 78 {0x5182a3b8, 0xffffffff, 0xb8}, /* PC-9801-XX (NEC8251) */ 79 {0x9181a3b8, 0xffffffff, 0x00}, /* PC-9801-120 (NEC8191) */ 80 {0, 0, 0} 81 }; 82 #endif 83 84 #if 0 85 /* 86 * these entries are initialized using the autoconfig menu 87 * The struct is invalid (and must be initialized) if the first 88 * CSN is zero. The init code fills invalid entries with CSN 255 89 * which is not a supported value. 90 */ 91 92 struct pnp_cinfo pnp_ldn_overrides[MAX_PNP_LDN] = { 93 { 0 } 94 }; 95 #endif 96 97 /* The READ_DATA port that we are using currently */ 98 static int pnp_rd_port; 99 100 static void pnp_send_initiation_key(void); 101 static int pnp_get_serial(pnp_id *p); 102 static int pnp_isolation_protocol(device_t parent); 103 104 char * 105 pnp_eisaformat(u_int32_t id) 106 { 107 u_int8_t *data = (u_int8_t *) &id; 108 static char idbuf[8]; 109 const char hextoascii[] = "0123456789abcdef"; 110 111 idbuf[0] = '@' + ((data[0] & 0x7c) >> 2); 112 idbuf[1] = '@' + (((data[0] & 0x3) << 3) + ((data[1] & 0xe0) >> 5)); 113 idbuf[2] = '@' + (data[1] & 0x1f); 114 idbuf[3] = hextoascii[(data[2] >> 4)]; 115 idbuf[4] = hextoascii[(data[2] & 0xf)]; 116 idbuf[5] = hextoascii[(data[3] >> 4)]; 117 idbuf[6] = hextoascii[(data[3] & 0xf)]; 118 idbuf[7] = 0; 119 return(idbuf); 120 } 121 122 static void 123 pnp_write(int d, u_char r) 124 { 125 outb (_PNP_ADDRESS, d); 126 outb (_PNP_WRITE_DATA, r); 127 } 128 129 #if 0 130 131 static u_char 132 pnp_read(int d) 133 { 134 outb (_PNP_ADDRESS, d); 135 return (inb(3 | (pnp_rd_port <<2))); 136 } 137 138 #endif 139 140 /* 141 * Send Initiation LFSR as described in "Plug and Play ISA Specification", 142 * Intel May 94. 143 */ 144 static void 145 pnp_send_initiation_key() 146 { 147 int cur, i; 148 149 /* Reset the LSFR */ 150 outb(_PNP_ADDRESS, 0); 151 outb(_PNP_ADDRESS, 0); /* yes, we do need it twice! */ 152 153 cur = 0x6a; 154 outb(_PNP_ADDRESS, cur); 155 156 for (i = 1; i < 32; i++) { 157 cur = (cur >> 1) | (((cur ^ (cur >> 1)) << 7) & 0xff); 158 outb(_PNP_ADDRESS, cur); 159 } 160 } 161 162 163 /* 164 * Get the device's serial number. Returns 1 if the serial is valid. 165 */ 166 static int 167 pnp_get_serial(pnp_id *p) 168 { 169 int i, bit, valid = 0, sum = 0x6a; 170 u_char *data = (u_char *)p; 171 172 bzero(data, sizeof(char) * 9); 173 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); 174 for (i = 0; i < 72; i++) { 175 bit = inb((pnp_rd_port << 2) | 0x3) == 0x55; 176 DELAY(250); /* Delay 250 usec */ 177 178 /* Can't Short Circuit the next evaluation, so 'and' is last */ 179 bit = (inb((pnp_rd_port << 2) | 0x3) == 0xaa) && bit; 180 DELAY(250); /* Delay 250 usec */ 181 182 valid = valid || bit; 183 184 if (i < 64) 185 sum = (sum >> 1) | 186 (((sum ^ (sum >> 1) ^ bit) << 7) & 0xff); 187 188 data[i / 8] = (data[i / 8] >> 1) | (bit ? 0x80 : 0); 189 } 190 191 valid = valid && (data[8] == sum); 192 193 return valid; 194 } 195 196 /* 197 * Fill's the buffer with resource info from the device. 198 * Returns the number of characters read. 199 */ 200 static int 201 pnp_get_resource_info(u_char *buffer, int len) 202 { 203 int i, j, count; 204 u_char temp; 205 206 count = 0; 207 for (i = 0; i < len; i++) { 208 outb(_PNP_ADDRESS, PNP_STATUS); 209 for (j = 0; j < 100; j++) { 210 if ((inb((pnp_rd_port << 2) | 0x3)) & 0x1) 211 break; 212 DELAY(1); 213 } 214 if (j == 100) { 215 printf("PnP device failed to report resource data\n"); 216 return count; 217 } 218 outb(_PNP_ADDRESS, PNP_RESOURCE_DATA); 219 temp = inb((pnp_rd_port << 2) | 0x3); 220 if (buffer != NULL) 221 buffer[i] = temp; 222 count++; 223 } 224 return count; 225 } 226 227 #if 0 228 /* 229 * write_pnp_parms initializes a logical device with the parms 230 * in d, and then activates the board if the last parameter is 1. 231 */ 232 233 static int 234 write_pnp_parms(struct pnp_cinfo *d, pnp_id *p, int ldn) 235 { 236 int i, empty = -1 ; 237 238 pnp_write (SET_LDN, ldn ); 239 i = pnp_read(SET_LDN) ; 240 if (i != ldn) { 241 printf("Warning: LDN %d does not exist\n", ldn); 242 } 243 for (i = 0; i < 8; i++) { 244 pnp_write(IO_CONFIG_BASE + i * 2, d->ic_port[i] >> 8 ); 245 pnp_write(IO_CONFIG_BASE + i * 2 + 1, d->ic_port[i] & 0xff ); 246 } 247 for (i = 0; i < 4; i++) { 248 pnp_write(MEM_CONFIG + i*8, (d->ic_mem[i].base >> 16) & 0xff ); 249 pnp_write(MEM_CONFIG + i*8+1, (d->ic_mem[i].base >> 8) & 0xff ); 250 pnp_write(MEM_CONFIG + i*8+2, d->ic_mem[i].control & 0xff ); 251 pnp_write(MEM_CONFIG + i*8+3, (d->ic_mem[i].range >> 16) & 0xff ); 252 pnp_write(MEM_CONFIG + i*8+4, (d->ic_mem[i].range >> 8) & 0xff ); 253 } 254 for (i = 0; i < 2; i++) { 255 pnp_write(IRQ_CONFIG + i*2 , d->irq[i] ); 256 pnp_write(IRQ_CONFIG + i*2 + 1, d->irq_type[i] ); 257 pnp_write(DRQ_CONFIG + i, d->drq[i] ); 258 } 259 /* 260 * store parameters read into the current kernel 261 * so manual editing next time is easier 262 */ 263 for (i = 0 ; i < MAX_PNP_LDN; i++) { 264 if (pnp_ldn_overrides[i].csn == d->csn && 265 pnp_ldn_overrides[i].ldn == ldn) { 266 d->flags = pnp_ldn_overrides[i].flags ; 267 pnp_ldn_overrides[i] = *d ; 268 break ; 269 } else if (pnp_ldn_overrides[i].csn < 1 || 270 pnp_ldn_overrides[i].csn == 255) 271 empty = i ; 272 } 273 if (i== MAX_PNP_LDN && empty != -1) 274 pnp_ldn_overrides[empty] = *d; 275 276 /* 277 * Here should really perform the range check, and 278 * return a failure if not successful. 279 */ 280 pnp_write (IO_RANGE_CHECK, 0); 281 DELAY(1000); /* XXX is it really necessary ? */ 282 pnp_write (ACTIVATE, d->enable ? 1 : 0); 283 DELAY(1000); /* XXX is it really necessary ? */ 284 return 1 ; 285 } 286 #endif 287 288 /* 289 * This function is called after the bus has assigned resource 290 * locations for a logical device. 291 */ 292 static void 293 pnp_set_config(void *arg, struct isa_config *config, int enable) 294 { 295 int csn = ((struct pnp_set_config_arg *) arg)->csn; 296 int ldn = ((struct pnp_set_config_arg *) arg)->ldn; 297 int i; 298 299 /* 300 * First put all cards into Sleep state with the initiation 301 * key, then put our card into Config state. 302 */ 303 pnp_send_initiation_key(); 304 pnp_write(PNP_WAKE, csn); 305 306 /* 307 * Select our logical device so that we can program it. 308 */ 309 pnp_write(PNP_SET_LDN, ldn); 310 311 /* 312 * Now program the resources. 313 */ 314 for (i = 0; i < config->ic_nmem; i++) { 315 u_int32_t start = config->ic_mem[i].ir_start; 316 u_int32_t size = config->ic_mem[i].ir_size; 317 if (start & 0xff) 318 panic("pnp_set_config: bogus memory assignment"); 319 pnp_write(PNP_MEM_BASE_HIGH(i), (start >> 16) & 0xff); 320 pnp_write(PNP_MEM_BASE_LOW(i), (start >> 8) & 0xff); 321 pnp_write(PNP_MEM_RANGE_HIGH(i), (size >> 16) & 0xff); 322 pnp_write(PNP_MEM_RANGE_LOW(i), (size >> 8) & 0xff); 323 } 324 for (; i < ISA_NMEM; i++) { 325 pnp_write(PNP_MEM_BASE_HIGH(i), 0); 326 pnp_write(PNP_MEM_BASE_LOW(i), 0); 327 pnp_write(PNP_MEM_RANGE_HIGH(i), 0); 328 pnp_write(PNP_MEM_RANGE_LOW(i), 0); 329 } 330 331 for (i = 0; i < config->ic_nport; i++) { 332 u_int32_t start = config->ic_port[i].ir_start; 333 pnp_write(PNP_IO_BASE_HIGH(i), (start >> 8) & 0xff); 334 pnp_write(PNP_IO_BASE_LOW(i), (start >> 0) & 0xff); 335 } 336 for (; i < ISA_NPORT; i++) { 337 pnp_write(PNP_IO_BASE_HIGH(i), 0); 338 pnp_write(PNP_IO_BASE_LOW(i), 0); 339 } 340 341 for (i = 0; i < config->ic_nirq; i++) { 342 int irq = ffs(config->ic_irqmask[i]) - 1; 343 pnp_write(PNP_IRQ_LEVEL(i), irq); 344 pnp_write(PNP_IRQ_TYPE(i), 2); /* XXX */ 345 } 346 for (; i < ISA_NIRQ; i++) { 347 /* 348 * IRQ 0 is not a valid interrupt selection and 349 * represents no interrupt selection. 350 */ 351 pnp_write(PNP_IRQ_LEVEL(i), 0); 352 } 353 354 for (i = 0; i < config->ic_ndrq; i++) { 355 int drq = ffs(config->ic_drqmask[i]) - 1; 356 pnp_write(PNP_DMA_CHANNEL(i), drq); 357 } 358 for (; i < ISA_NDRQ; i++) { 359 /* 360 * DMA channel 4, the cascade channel is used to 361 * indicate no DMA channel is active. 362 */ 363 pnp_write(PNP_DMA_CHANNEL(i), 4); 364 } 365 366 pnp_write(PNP_ACTIVATE, enable ? 1 : 0); 367 368 /* 369 * Wake everyone up again, we are finished. 370 */ 371 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); 372 } 373 374 /* 375 * Process quirks for a logical device.. The card must be in Config state. 376 */ 377 static void 378 pnp_check_quirks(u_int32_t vendor_id, u_int32_t logical_id, int ldn) 379 { 380 struct pnp_quirk *qp; 381 382 for (qp = &pnp_quirks[0]; qp->vendor_id; qp++) { 383 if (qp->vendor_id == vendor_id 384 && (qp->logical_id == 0 385 || qp->logical_id == logical_id)) { 386 switch (qp->type) { 387 case PNP_QUIRK_WRITE_REG: 388 pnp_write(PNP_SET_LDN, ldn); 389 pnp_write(qp->arg1, qp->arg2); 390 break; 391 } 392 } 393 } 394 } 395 396 /* 397 * Scan Resource Data for Logical Devices. 398 * 399 * This function exits as soon as it gets an error reading *ANY* 400 * Resource Data or it reaches the end of Resource Data. In the first 401 * case the return value will be TRUE, FALSE otherwise. 402 */ 403 static int 404 pnp_create_devices(device_t parent, pnp_id *p, int csn, 405 u_char *resources, int len) 406 { 407 u_char tag, *resp, *resinfo, *startres = 0; 408 int large_len, scanning = len, retval = FALSE; 409 u_int32_t logical_id; 410 u_int32_t compat_id; 411 device_t dev = 0; 412 int ldn = 0; 413 struct pnp_set_config_arg *csnldn; 414 char buf[100]; 415 char *desc = 0; 416 417 resp = resources; 418 while (scanning > 0) { 419 tag = *resp++; 420 scanning--; 421 if (PNP_RES_TYPE(tag) != 0) { 422 /* Large resource */ 423 if (scanning < 2) { 424 scanning = 0; 425 continue; 426 } 427 large_len = resp[0] + (resp[1] << 8); 428 resp += 2; 429 430 if (scanning < large_len) { 431 scanning = 0; 432 continue; 433 } 434 resinfo = resp; 435 resp += large_len; 436 scanning -= large_len; 437 438 if (PNP_LRES_NUM(tag) == PNP_TAG_ID_ANSI) { 439 if (large_len > sizeof(buf) - 1) 440 large_len = sizeof(buf) - 1; 441 bcopy(resinfo, buf, large_len); 442 443 /* 444 * Trim trailing spaces. 445 */ 446 while (buf[large_len-1] == ' ') 447 large_len--; 448 buf[large_len] = '\0'; 449 desc = buf; 450 if (dev) 451 device_set_desc_copy(dev, desc); 452 continue; 453 } 454 455 continue; 456 } 457 458 /* Small resource */ 459 if (scanning < PNP_SRES_LEN(tag)) { 460 scanning = 0; 461 continue; 462 } 463 resinfo = resp; 464 resp += PNP_SRES_LEN(tag); 465 scanning -= PNP_SRES_LEN(tag);; 466 467 switch (PNP_SRES_NUM(tag)) { 468 case PNP_TAG_LOGICAL_DEVICE: 469 /* 470 * Parse the resources for the previous 471 * logical device (if any). 472 */ 473 if (startres) { 474 pnp_parse_resources(dev, startres, 475 resinfo - startres - 1); 476 dev = 0; 477 startres = 0; 478 } 479 480 /* 481 * A new logical device. Scan for end of 482 * resources. 483 */ 484 bcopy(resinfo, &logical_id, 4); 485 pnp_check_quirks(p->vendor_id, logical_id, ldn); 486 compat_id = 0; 487 dev = BUS_ADD_CHILD(parent, ISA_ORDER_PNP, NULL, -1); 488 if (desc) 489 device_set_desc_copy(dev, desc); 490 isa_set_vendorid(dev, p->vendor_id); 491 isa_set_serial(dev, p->serial); 492 isa_set_logicalid(dev, logical_id); 493 csnldn = malloc(sizeof *csnldn, M_DEVBUF, M_NOWAIT); 494 if (!csnldn) { 495 device_printf(parent, 496 "out of memory\n"); 497 scanning = 0; 498 break; 499 } 500 csnldn->csn = csn; 501 csnldn->ldn = ldn; 502 ISA_SET_CONFIG_CALLBACK(parent, dev, 503 pnp_set_config, csnldn); 504 ldn++; 505 startres = resp; 506 break; 507 508 case PNP_TAG_END: 509 if (!startres) { 510 device_printf(parent, 511 "malformed resources\n"); 512 scanning = 0; 513 break; 514 } 515 pnp_parse_resources(dev, startres, 516 resinfo - startres - 1); 517 dev = 0; 518 startres = 0; 519 scanning = 0; 520 break; 521 522 default: 523 /* Skip this resource */ 524 break; 525 } 526 } 527 528 return retval; 529 } 530 531 /* 532 * Read 'amount' bytes of resources from the card, allocating memory 533 * as needed. If a buffer is already available, it should be passed in 534 * '*resourcesp' and its length in '*spacep'. The number of resource 535 * bytes already in the buffer should be passed in '*lenp'. The memory 536 * allocated will be returned in '*resourcesp' with its size and the 537 * number of bytes of resources in '*spacep' and '*lenp' respectively. 538 */ 539 static int 540 pnp_read_bytes(int amount, u_char **resourcesp, int *spacep, int *lenp) 541 { 542 u_char *resources = *resourcesp; 543 u_char *newres; 544 int space = *spacep; 545 int len = *lenp; 546 547 if (space == 0) { 548 space = 1024; 549 resources = malloc(space, M_TEMP, M_NOWAIT); 550 if (!resources) 551 return ENOMEM; 552 } 553 554 if (len + amount > space) { 555 int extra = 1024; 556 while (len + amount > space + extra) 557 extra += 1024; 558 newres = malloc(space + extra, M_TEMP, M_NOWAIT); 559 if (!newres) 560 return ENOMEM; 561 bcopy(resources, newres, len); 562 free(resources, M_TEMP); 563 resources = newres; 564 space += extra; 565 } 566 567 if (pnp_get_resource_info(resources + len, amount) != amount) 568 return EINVAL; 569 len += amount; 570 571 *resourcesp = resources; 572 *spacep = space; 573 *lenp = len; 574 575 return 0; 576 } 577 578 /* 579 * Read all resources from the card, allocating memory as needed. If a 580 * buffer is already available, it should be passed in '*resourcesp' 581 * and its length in '*spacep'. The memory allocated will be returned 582 * in '*resourcesp' with its size and the number of bytes of resources 583 * in '*spacep' and '*lenp' respectively. 584 */ 585 static int 586 pnp_read_resources(u_char **resourcesp, int *spacep, int *lenp) 587 { 588 u_char *resources = *resourcesp; 589 int space = *spacep; 590 int len = 0; 591 int error, done; 592 u_char tag; 593 594 error = 0; 595 done = 0; 596 while (!done) { 597 error = pnp_read_bytes(1, &resources, &space, &len); 598 if (error) 599 goto out; 600 tag = resources[len-1]; 601 if (PNP_RES_TYPE(tag) == 0) { 602 /* 603 * Small resource, read contents. 604 */ 605 error = pnp_read_bytes(PNP_SRES_LEN(tag), 606 &resources, &space, &len); 607 if (error) 608 goto out; 609 if (PNP_SRES_NUM(tag) == PNP_TAG_END) 610 done = 1; 611 } else { 612 /* 613 * Large resource, read length and contents. 614 */ 615 error = pnp_read_bytes(2, &resources, &space, &len); 616 if (error) 617 goto out; 618 error = pnp_read_bytes(resources[len-2] 619 + (resources[len-1] << 8), 620 &resources, &space, &len); 621 if (error) 622 goto out; 623 } 624 } 625 626 out: 627 *resourcesp = resources; 628 *spacep = space; 629 *lenp = len; 630 return error; 631 } 632 633 /* 634 * Run the isolation protocol. Use pnp_rd_port as the READ_DATA port 635 * value (caller should try multiple READ_DATA locations before giving 636 * up). Upon exiting, all cards are aware that they should use 637 * pnp_rd_port as the READ_DATA port. 638 * 639 * In the first pass, a csn is assigned to each board and pnp_id's 640 * are saved to an array, pnp_devices. In the second pass, each 641 * card is woken up and the device configuration is called. 642 */ 643 static int 644 pnp_isolation_protocol(device_t parent) 645 { 646 int csn; 647 pnp_id id; 648 int found = 0, len; 649 u_char *resources = 0; 650 int space = 0; 651 int error; 652 #ifdef PC98 653 int n, necpnp; 654 u_char buffer[10]; 655 #endif 656 657 /* 658 * Put all cards into the Sleep state so that we can clear 659 * their CSNs. 660 */ 661 pnp_send_initiation_key(); 662 663 /* 664 * Clear the CSN for all cards. 665 */ 666 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_RESET_CSN); 667 668 /* 669 * Move all cards to the Isolation state. 670 */ 671 pnp_write(PNP_WAKE, 0); 672 673 /* 674 * Tell them where the read point is going to be this time. 675 */ 676 pnp_write(PNP_SET_RD_DATA, pnp_rd_port); 677 678 for (csn = 1; csn < PNP_MAX_CARDS; csn++) { 679 /* 680 * Start the serial isolation protocol. 681 */ 682 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); 683 DELAY(1000); /* Delay 1 msec */ 684 685 if (pnp_get_serial(&id)) { 686 /* 687 * We have read the id from a card 688 * successfully. The card which won the 689 * isolation protocol will be in Isolation 690 * mode and all others will be in Sleep. 691 * Program the CSN of the isolated card 692 * (taking it to Config state) and read its 693 * resources, creating devices as we find 694 * logical devices on the card. 695 */ 696 pnp_write(PNP_SET_CSN, csn); 697 #ifdef PC98 698 if (bootverbose) 699 printf("PnP Vendor ID = %x\n", id.vendor_id); 700 /* Check for NEC PnP (9 bytes serial). */ 701 for (n = necpnp = 0; necids[n].vendor_id; n++) { 702 if (id.vendor_id == necids[n].vendor_id) { 703 necpnp = 1; 704 break; 705 } 706 } 707 if (necpnp) { 708 if (bootverbose) 709 printf("It seems to NEC-PnP card (%s).\n", 710 pnp_eisaformat(id.vendor_id)); 711 /* Read dummy 9 bytes serial area. */ 712 pnp_get_resource_info(buffer, 9); 713 } else { 714 if (bootverbose) 715 printf("It seems to Normal-ISA-PnP card (%s).\n", 716 pnp_eisaformat(id.vendor_id)); 717 } 718 if (bootverbose) 719 printf("Reading PnP configuration for %s.\n", 720 pnp_eisaformat(id.vendor_id)); 721 #endif 722 error = pnp_read_resources(&resources, 723 &space, 724 &len); 725 if (error) 726 break; 727 pnp_create_devices(parent, &id, csn, 728 resources, len); 729 found++; 730 } else 731 break; 732 733 /* 734 * Put this card back to the Sleep state and 735 * simultaneously move all cards which don't have a 736 * CSN yet to Isolation state. 737 */ 738 pnp_write(PNP_WAKE, 0); 739 } 740 741 /* 742 * Unless we have chosen the wrong read port, all cards will 743 * be in Sleep state. Put them back into WaitForKey for 744 * now. Their resources will be programmed later. 745 */ 746 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); 747 748 /* 749 * Cleanup. 750 */ 751 if (resources) 752 free(resources, M_TEMP); 753 754 return found; 755 } 756 757 758 /* 759 * pnp_identify() 760 * 761 * autoconfiguration of pnp devices. This routine just runs the 762 * isolation protocol over several ports, until one is successful. 763 * 764 * may be called more than once ? 765 * 766 */ 767 768 static void 769 pnp_identify(driver_t *driver, device_t parent) 770 { 771 int num_pnp_devs; 772 773 #if 0 774 if (pnp_ldn_overrides[0].csn == 0) { 775 if (bootverbose) 776 printf("Initializing PnP override table\n"); 777 bzero (pnp_ldn_overrides, sizeof(pnp_ldn_overrides)); 778 pnp_ldn_overrides[0].csn = 255 ; 779 } 780 #endif 781 782 /* Try various READ_DATA ports from 0x203-0x3ff */ 783 for (pnp_rd_port = 0x80; (pnp_rd_port < 0xff); pnp_rd_port += 0x10) { 784 if (bootverbose) 785 printf("Trying Read_Port at %x\n", (pnp_rd_port << 2) | 0x3); 786 787 num_pnp_devs = pnp_isolation_protocol(parent); 788 if (num_pnp_devs) 789 break; 790 } 791 } 792 793 static device_method_t pnp_methods[] = { 794 /* Device interface */ 795 DEVMETHOD(device_identify, pnp_identify), 796 797 { 0, 0 } 798 }; 799 800 static driver_t pnp_driver = { 801 "pnp", 802 pnp_methods, 803 1, /* no softc */ 804 }; 805 806 static devclass_t pnp_devclass; 807 808 DRIVER_MODULE(pnp, isa, pnp_driver, pnp_devclass, 0, 0);
Cache object: f0ef3a93f380ca77e5a26c22cb424c59
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]