1 /* 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 1996, Sujal M. Patel 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * from: pnp.c,v 1.11 1999/05/06 22:11:19 peter Exp 29 */ 30 31 #include <sys/cdefs.h> 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/module.h> 36 #include <sys/bus.h> 37 #include <sys/endian.h> 38 #include <sys/malloc.h> 39 #include <isa/isavar.h> 40 #include <isa/pnpreg.h> 41 #include <isa/pnpvar.h> 42 #include <machine/bus.h> 43 44 typedef struct _pnp_id { 45 uint32_t vendor_id; 46 uint32_t serial; 47 u_char checksum; 48 } pnp_id; 49 50 struct pnp_set_config_arg { 51 int csn; /* Card number to configure */ 52 int ldn; /* Logical device on card */ 53 }; 54 55 struct pnp_quirk { 56 uint32_t vendor_id; /* Vendor of the card */ 57 uint32_t logical_id; /* ID of the device with quirk */ 58 int type; 59 #define PNP_QUIRK_WRITE_REG 1 /* Need to write a pnp register */ 60 #define PNP_QUIRK_EXTRA_IO 2 /* Has extra io ports */ 61 int arg1; 62 int arg2; 63 }; 64 65 struct pnp_quirk pnp_quirks[] = { 66 /* 67 * The Gravis UltraSound needs register 0xf2 to be set to 0xff 68 * to enable power. 69 * XXX need to know the logical device id. 70 */ 71 { 0x0100561e /* GRV0001 */, 0, 72 PNP_QUIRK_WRITE_REG, 0xf2, 0xff }, 73 /* 74 * An emu8000 does not give us other than the first 75 * port. 76 */ 77 { 0x26008c0e /* SB16 */, 0x21008c0e, 78 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 79 { 0x42008c0e /* SB32(CTL0042) */, 0x21008c0e, 80 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 81 { 0x44008c0e /* SB32(CTL0044) */, 0x21008c0e, 82 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 83 { 0x49008c0e /* SB32(CTL0049) */, 0x21008c0e, 84 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 85 { 0xf1008c0e /* SB32(CTL00f1) */, 0x21008c0e, 86 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 87 { 0xc1008c0e /* SB64(CTL00c1) */, 0x22008c0e, 88 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 89 { 0xc5008c0e /* SB64(CTL00c5) */, 0x22008c0e, 90 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 91 { 0xe4008c0e /* SB64(CTL00e4) */, 0x22008c0e, 92 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 93 94 { 0 } 95 }; 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 static void 105 pnp_write(int d, u_char r) 106 { 107 outb (_PNP_ADDRESS, d); 108 outb (_PNP_WRITE_DATA, r); 109 } 110 111 /* 112 * Send Initiation LFSR as described in "Plug and Play ISA Specification", 113 * Intel May 94. 114 */ 115 static void 116 pnp_send_initiation_key(void) 117 { 118 int cur, i; 119 120 /* Reset the LSFR */ 121 outb(_PNP_ADDRESS, 0); 122 outb(_PNP_ADDRESS, 0); /* yes, we do need it twice! */ 123 124 cur = 0x6a; 125 outb(_PNP_ADDRESS, cur); 126 127 for (i = 1; i < 32; i++) { 128 cur = (cur >> 1) | (((cur ^ (cur >> 1)) << 7) & 0xff); 129 outb(_PNP_ADDRESS, cur); 130 } 131 } 132 133 134 /* 135 * Get the device's serial number. Returns 1 if the serial is valid. 136 */ 137 static int 138 pnp_get_serial(pnp_id *p) 139 { 140 int i, bit, valid = 0, sum = 0x6a; 141 u_char *data = (u_char *)p; 142 143 bzero(data, sizeof(char) * 9); 144 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); 145 for (i = 0; i < 72; i++) { 146 bit = inb((pnp_rd_port << 2) | 0x3) == 0x55; 147 DELAY(250); /* Delay 250 usec */ 148 149 /* Can't Short Circuit the next evaluation, so 'and' is last */ 150 bit = (inb((pnp_rd_port << 2) | 0x3) == 0xaa) && bit; 151 DELAY(250); /* Delay 250 usec */ 152 153 valid = valid || bit; 154 if (i < 64) 155 sum = (sum >> 1) | 156 (((sum ^ (sum >> 1) ^ bit) << 7) & 0xff); 157 data[i / 8] = (data[i / 8] >> 1) | (bit ? 0x80 : 0); 158 } 159 160 valid = valid && (data[8] == sum); 161 162 return (valid); 163 } 164 165 /* 166 * Fill's the buffer with resource info from the device. 167 * Returns the number of characters read. 168 */ 169 static int 170 pnp_get_resource_info(u_char *buffer, int len) 171 { 172 int i, j, count; 173 u_char temp; 174 175 count = 0; 176 for (i = 0; i < len; i++) { 177 outb(_PNP_ADDRESS, PNP_STATUS); 178 for (j = 0; j < 100; j++) { 179 if ((inb((pnp_rd_port << 2) | 0x3)) & 0x1) 180 break; 181 DELAY(10); 182 } 183 if (j == 100) { 184 printf("PnP device failed to report resource data\n"); 185 return (count); 186 } 187 outb(_PNP_ADDRESS, PNP_RESOURCE_DATA); 188 temp = inb((pnp_rd_port << 2) | 0x3); 189 if (buffer != NULL) 190 buffer[i] = temp; 191 count++; 192 } 193 return (count); 194 } 195 196 /* 197 * This function is called after the bus has assigned resource 198 * locations for a logical device. 199 */ 200 static void 201 pnp_set_config(void *arg, struct isa_config *config, int enable) 202 { 203 int csn = ((struct pnp_set_config_arg *) arg)->csn; 204 int ldn = ((struct pnp_set_config_arg *) arg)->ldn; 205 int i; 206 207 /* 208 * First put all cards into Sleep state with the initiation 209 * key, then put our card into Config state. 210 */ 211 pnp_send_initiation_key(); 212 pnp_write(PNP_WAKE, csn); 213 214 /* 215 * Select our logical device so that we can program it. 216 */ 217 pnp_write(PNP_SET_LDN, ldn); 218 219 /* 220 * Constrain the number of resources we will try to program 221 */ 222 if (config->ic_nmem > ISA_PNP_NMEM) { 223 printf("too many ISA memory ranges (%d > %d)\n", 224 config->ic_nmem, ISA_PNP_NMEM); 225 config->ic_nmem = ISA_PNP_NMEM; 226 } 227 if (config->ic_nport > ISA_PNP_NPORT) { 228 printf("too many ISA I/O ranges (%d > %d)\n", config->ic_nport, 229 ISA_PNP_NPORT); 230 config->ic_nport = ISA_PNP_NPORT; 231 } 232 if (config->ic_nirq > ISA_PNP_NIRQ) { 233 printf("too many ISA IRQs (%d > %d)\n", config->ic_nirq, 234 ISA_PNP_NIRQ); 235 config->ic_nirq = ISA_PNP_NIRQ; 236 } 237 if (config->ic_ndrq > ISA_PNP_NDRQ) { 238 printf("too many ISA DRQs (%d > %d)\n", config->ic_ndrq, 239 ISA_PNP_NDRQ); 240 config->ic_ndrq = ISA_PNP_NDRQ; 241 } 242 243 /* 244 * Now program the resources. 245 */ 246 for (i = 0; i < config->ic_nmem; i++) { 247 uint32_t start; 248 uint32_t size; 249 250 /* XXX: should handle memory control register, 32 bit memory */ 251 if (config->ic_mem[i].ir_size == 0) { 252 pnp_write(PNP_MEM_BASE_HIGH(i), 0); 253 pnp_write(PNP_MEM_BASE_LOW(i), 0); 254 pnp_write(PNP_MEM_RANGE_HIGH(i), 0); 255 pnp_write(PNP_MEM_RANGE_LOW(i), 0); 256 } else { 257 start = config->ic_mem[i].ir_start; 258 size = config->ic_mem[i].ir_size; 259 if (start & 0xff) 260 panic("pnp_set_config: bogus memory assignment"); 261 pnp_write(PNP_MEM_BASE_HIGH(i), (start >> 16) & 0xff); 262 pnp_write(PNP_MEM_BASE_LOW(i), (start >> 8) & 0xff); 263 pnp_write(PNP_MEM_RANGE_HIGH(i), (size >> 16) & 0xff); 264 pnp_write(PNP_MEM_RANGE_LOW(i), (size >> 8) & 0xff); 265 } 266 } 267 for (; i < ISA_PNP_NMEM; i++) { 268 pnp_write(PNP_MEM_BASE_HIGH(i), 0); 269 pnp_write(PNP_MEM_BASE_LOW(i), 0); 270 pnp_write(PNP_MEM_RANGE_HIGH(i), 0); 271 pnp_write(PNP_MEM_RANGE_LOW(i), 0); 272 } 273 274 for (i = 0; i < config->ic_nport; i++) { 275 uint32_t start; 276 277 if (config->ic_port[i].ir_size == 0) { 278 pnp_write(PNP_IO_BASE_HIGH(i), 0); 279 pnp_write(PNP_IO_BASE_LOW(i), 0); 280 } else { 281 start = config->ic_port[i].ir_start; 282 pnp_write(PNP_IO_BASE_HIGH(i), (start >> 8) & 0xff); 283 pnp_write(PNP_IO_BASE_LOW(i), (start >> 0) & 0xff); 284 } 285 } 286 for (; i < ISA_PNP_NPORT; i++) { 287 pnp_write(PNP_IO_BASE_HIGH(i), 0); 288 pnp_write(PNP_IO_BASE_LOW(i), 0); 289 } 290 291 for (i = 0; i < config->ic_nirq; i++) { 292 int irq; 293 294 /* XXX: interrupt type */ 295 if (config->ic_irqmask[i] == 0) { 296 pnp_write(PNP_IRQ_LEVEL(i), 0); 297 pnp_write(PNP_IRQ_TYPE(i), 2); 298 } else { 299 irq = ffs(config->ic_irqmask[i]) - 1; 300 pnp_write(PNP_IRQ_LEVEL(i), irq); 301 pnp_write(PNP_IRQ_TYPE(i), 2); /* XXX */ 302 } 303 } 304 for (; i < ISA_PNP_NIRQ; i++) { 305 /* 306 * IRQ 0 is not a valid interrupt selection and 307 * represents no interrupt selection. 308 */ 309 pnp_write(PNP_IRQ_LEVEL(i), 0); 310 pnp_write(PNP_IRQ_TYPE(i), 2); 311 } 312 313 for (i = 0; i < config->ic_ndrq; i++) { 314 int drq; 315 316 if (config->ic_drqmask[i] == 0) { 317 pnp_write(PNP_DMA_CHANNEL(i), 4); 318 } else { 319 drq = ffs(config->ic_drqmask[i]) - 1; 320 pnp_write(PNP_DMA_CHANNEL(i), drq); 321 } 322 } 323 for (; i < ISA_PNP_NDRQ; i++) { 324 /* 325 * DMA channel 4, the cascade channel is used to 326 * indicate no DMA channel is active. 327 */ 328 pnp_write(PNP_DMA_CHANNEL(i), 4); 329 } 330 331 pnp_write(PNP_ACTIVATE, enable ? 1 : 0); 332 333 /* 334 * Wake everyone up again, we are finished. 335 */ 336 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); 337 } 338 339 /* 340 * Process quirks for a logical device.. The card must be in Config state. 341 */ 342 void 343 pnp_check_quirks(uint32_t vendor_id, uint32_t logical_id, int ldn, 344 struct isa_config *config) 345 { 346 struct pnp_quirk *qp; 347 348 for (qp = &pnp_quirks[0]; qp->vendor_id; qp++) { 349 if (qp->vendor_id == vendor_id 350 && (qp->logical_id == 0 || qp->logical_id == logical_id)) { 351 switch (qp->type) { 352 case PNP_QUIRK_WRITE_REG: 353 pnp_write(PNP_SET_LDN, ldn); 354 pnp_write(qp->arg1, qp->arg2); 355 break; 356 case PNP_QUIRK_EXTRA_IO: 357 if (config == NULL) 358 break; 359 if (qp->arg1 != 0) { 360 config->ic_nport++; 361 config->ic_port[config->ic_nport - 1] = config->ic_port[0]; 362 config->ic_port[config->ic_nport - 1].ir_start += qp->arg1; 363 config->ic_port[config->ic_nport - 1].ir_end += qp->arg1; 364 } 365 if (qp->arg2 != 0) { 366 config->ic_nport++; 367 config->ic_port[config->ic_nport - 1] = config->ic_port[0]; 368 config->ic_port[config->ic_nport - 1].ir_start += qp->arg2; 369 config->ic_port[config->ic_nport - 1].ir_end += qp->arg2; 370 } 371 break; 372 } 373 } 374 } 375 } 376 377 /* 378 * Scan Resource Data for Logical Devices. 379 * 380 * This function exits as soon as it gets an error reading *ANY* 381 * Resource Data or it reaches the end of Resource Data. In the first 382 * case the return value will be TRUE, FALSE otherwise. 383 */ 384 static int 385 pnp_create_devices(device_t parent, pnp_id *p, int csn, 386 u_char *resources, int len) 387 { 388 u_char tag, *resp, *resinfo, *startres = NULL; 389 int large_len, scanning = len, retval = FALSE; 390 uint32_t logical_id; 391 device_t dev = 0; 392 int ldn = 0; 393 struct pnp_set_config_arg *csnldn; 394 char buf[100]; 395 char *desc = NULL; 396 397 resp = resources; 398 while (scanning > 0) { 399 tag = *resp++; 400 scanning--; 401 if (PNP_RES_TYPE(tag) != 0) { 402 /* Large resource */ 403 if (scanning < 2) { 404 scanning = 0; 405 continue; 406 } 407 large_len = resp[0] + (resp[1] << 8); 408 resp += 2; 409 410 if (scanning < large_len) { 411 scanning = 0; 412 continue; 413 } 414 resinfo = resp; 415 resp += large_len; 416 scanning -= large_len; 417 418 if (PNP_LRES_NUM(tag) == PNP_TAG_ID_ANSI) { 419 if (dev) { 420 /* 421 * This is an optional device 422 * identifier string. Skip it 423 * for now. 424 */ 425 continue; 426 } 427 /* else mandately card identifier string */ 428 if (large_len > sizeof(buf) - 1) 429 large_len = sizeof(buf) - 1; 430 bcopy(resinfo, buf, large_len); 431 432 /* 433 * Trim trailing spaces. 434 */ 435 while (buf[large_len-1] == ' ') 436 large_len--; 437 buf[large_len] = '\0'; 438 desc = buf; 439 continue; 440 } 441 442 continue; 443 } 444 445 /* Small resource */ 446 if (scanning < PNP_SRES_LEN(tag)) { 447 scanning = 0; 448 continue; 449 } 450 resinfo = resp; 451 resp += PNP_SRES_LEN(tag); 452 scanning -= PNP_SRES_LEN(tag); 453 454 switch (PNP_SRES_NUM(tag)) { 455 case PNP_TAG_LOGICAL_DEVICE: 456 /* 457 * Parse the resources for the previous 458 * logical device (if any). 459 */ 460 if (startres) { 461 pnp_parse_resources(dev, startres, 462 resinfo - startres - 1, ldn); 463 dev = 0; 464 startres = NULL; 465 } 466 467 /* 468 * A new logical device. Scan for end of 469 * resources. 470 */ 471 bcopy(resinfo, &logical_id, 4); 472 pnp_check_quirks(p->vendor_id, logical_id, ldn, NULL); 473 dev = BUS_ADD_CHILD(parent, ISA_ORDER_PNP, NULL, -1); 474 if (desc) 475 device_set_desc_copy(dev, desc); 476 else 477 device_set_desc_copy(dev, 478 pnp_eisaformat(logical_id)); 479 isa_set_vendorid(dev, p->vendor_id); 480 isa_set_serial(dev, p->serial); 481 isa_set_logicalid(dev, logical_id); 482 isa_set_configattr(dev, 483 ISACFGATTR_CANDISABLE | ISACFGATTR_DYNAMIC); 484 csnldn = malloc(sizeof *csnldn, M_DEVBUF, M_NOWAIT); 485 if (!csnldn) { 486 device_printf(parent, "out of memory\n"); 487 scanning = 0; 488 break; 489 } 490 csnldn->csn = csn; 491 csnldn->ldn = ldn; 492 ISA_SET_CONFIG_CALLBACK(parent, dev, pnp_set_config, 493 csnldn); 494 isa_set_pnp_csn(dev, csn); 495 isa_set_pnp_ldn(dev, ldn); 496 ldn++; 497 startres = resp; 498 break; 499 500 case PNP_TAG_END: 501 if (!startres) { 502 device_printf(parent, "malformed resources\n"); 503 scanning = 0; 504 break; 505 } 506 pnp_parse_resources(dev, startres, 507 resinfo - startres - 1, ldn); 508 dev = 0; 509 startres = NULL; 510 scanning = 0; 511 break; 512 513 default: 514 /* Skip this resource */ 515 break; 516 } 517 } 518 519 return (retval); 520 } 521 522 /* 523 * Read 'amount' bytes of resources from the card, allocating memory 524 * as needed. If a buffer is already available, it should be passed in 525 * '*resourcesp' and its length in '*spacep'. The number of resource 526 * bytes already in the buffer should be passed in '*lenp'. The memory 527 * allocated will be returned in '*resourcesp' with its size and the 528 * number of bytes of resources in '*spacep' and '*lenp' respectively. 529 * 530 * XXX: Multiple problems here, we forget to free() stuff in one 531 * XXX: error return, and in another case we free (*resourcesp) but 532 * XXX: don't tell the caller. 533 */ 534 static int 535 pnp_read_bytes(int amount, u_char **resourcesp, int *spacep, int *lenp) 536 { 537 u_char *resources = *resourcesp; 538 u_char *newres; 539 int space = *spacep; 540 int len = *lenp; 541 542 if (space == 0) { 543 space = 1024; 544 resources = malloc(space, M_TEMP, M_NOWAIT); 545 if (!resources) 546 return (ENOMEM); 547 } 548 549 if (len + amount > space) { 550 int extra = 1024; 551 while (len + amount > space + extra) 552 extra += 1024; 553 newres = malloc(space + extra, M_TEMP, M_NOWAIT); 554 if (!newres) { 555 /* XXX: free resources */ 556 return (ENOMEM); 557 } 558 bcopy(resources, newres, len); 559 free(resources, M_TEMP); 560 resources = newres; 561 space += extra; 562 } 563 564 if (pnp_get_resource_info(resources + len, amount) != amount) 565 return (EINVAL); 566 len += amount; 567 568 *resourcesp = resources; 569 *spacep = space; 570 *lenp = len; 571 572 return (0); 573 } 574 575 /* 576 * Read all resources from the card, allocating memory as needed. If a 577 * buffer is already available, it should be passed in '*resourcesp' 578 * and its length in '*spacep'. The memory allocated will be returned 579 * in '*resourcesp' with its size and the number of bytes of resources 580 * in '*spacep' and '*lenp' respectively. 581 */ 582 static int 583 pnp_read_resources(u_char **resourcesp, int *spacep, int *lenp) 584 { 585 u_char *resources = *resourcesp; 586 int space = *spacep; 587 int len = 0; 588 int error, done; 589 u_char tag; 590 591 error = 0; 592 done = 0; 593 while (!done) { 594 error = pnp_read_bytes(1, &resources, &space, &len); 595 if (error) 596 goto out; 597 tag = resources[len-1]; 598 if (PNP_RES_TYPE(tag) == 0) { 599 /* 600 * Small resource, read contents. 601 */ 602 error = pnp_read_bytes(PNP_SRES_LEN(tag), 603 &resources, &space, &len); 604 if (error) 605 goto out; 606 if (PNP_SRES_NUM(tag) == PNP_TAG_END) 607 done = 1; 608 } else { 609 /* 610 * Large resource, read length and contents. 611 */ 612 error = pnp_read_bytes(2, &resources, &space, &len); 613 if (error) 614 goto out; 615 error = pnp_read_bytes(resources[len-2] 616 + (resources[len-1] << 8), &resources, &space, 617 &len); 618 if (error) 619 goto out; 620 } 621 } 622 623 out: 624 *resourcesp = resources; 625 *spacep = space; 626 *lenp = len; 627 return (error); 628 } 629 630 /* 631 * Run the isolation protocol. Use pnp_rd_port as the READ_DATA port 632 * value (caller should try multiple READ_DATA locations before giving 633 * up). Upon exiting, all cards are aware that they should use 634 * pnp_rd_port as the READ_DATA port. 635 * 636 * In the first pass, a csn is assigned to each board and pnp_id's 637 * are saved to an array, pnp_devices. In the second pass, each 638 * card is woken up and the device configuration is called. 639 */ 640 static int 641 pnp_isolation_protocol(device_t parent) 642 { 643 int csn; 644 pnp_id id; 645 int found = 0, len; 646 u_char *resources = NULL; 647 int space = 0; 648 int error; 649 650 /* 651 * Put all cards into the Sleep state so that we can clear 652 * their CSNs. 653 */ 654 pnp_send_initiation_key(); 655 656 /* 657 * Clear the CSN for all cards. 658 */ 659 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_RESET_CSN); 660 661 /* 662 * Move all cards to the Isolation state. 663 */ 664 pnp_write(PNP_WAKE, 0); 665 666 /* 667 * Tell them where the read point is going to be this time. 668 */ 669 pnp_write(PNP_SET_RD_DATA, pnp_rd_port); 670 671 for (csn = 1; csn < PNP_MAX_CARDS; csn++) { 672 /* 673 * Start the serial isolation protocol. 674 */ 675 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); 676 DELAY(1000); /* Delay 1 msec */ 677 678 if (pnp_get_serial(&id)) { 679 /* 680 * We have read the id from a card 681 * successfully. The card which won the 682 * isolation protocol will be in Isolation 683 * mode and all others will be in Sleep. 684 * Program the CSN of the isolated card 685 * (taking it to Config state) and read its 686 * resources, creating devices as we find 687 * logical devices on the card. 688 */ 689 pnp_write(PNP_SET_CSN, csn); 690 if (bootverbose) 691 printf("Reading PnP configuration for %s.\n", 692 pnp_eisaformat(id.vendor_id)); 693 error = pnp_read_resources(&resources, &space, &len); 694 if (error) 695 break; 696 pnp_create_devices(parent, &id, csn, resources, len); 697 found++; 698 } else 699 break; 700 701 /* 702 * Put this card back to the Sleep state and 703 * simultaneously move all cards which don't have a 704 * CSN yet to Isolation state. 705 */ 706 pnp_write(PNP_WAKE, 0); 707 } 708 709 /* 710 * Unless we have chosen the wrong read port, all cards will 711 * be in Sleep state. Put them back into WaitForKey for 712 * now. Their resources will be programmed later. 713 */ 714 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); 715 716 /* 717 * Cleanup. 718 */ 719 if (resources) 720 free(resources, M_TEMP); 721 722 return (found); 723 } 724 725 726 /* 727 * pnp_identify() 728 * 729 * autoconfiguration of pnp devices. This routine just runs the 730 * isolation protocol over several ports, until one is successful. 731 * 732 * may be called more than once ? 733 * 734 */ 735 736 static void 737 pnp_identify(driver_t *driver, device_t parent) 738 { 739 int num_pnp_devs; 740 741 /* Try various READ_DATA ports from 0x203-0x3ff */ 742 for (pnp_rd_port = 0x80; (pnp_rd_port < 0xff); pnp_rd_port += 0x10) { 743 if (bootverbose) 744 printf("pnp_identify: Trying Read_Port at %x\n", 745 (pnp_rd_port << 2) | 0x3); 746 747 num_pnp_devs = pnp_isolation_protocol(parent); 748 if (num_pnp_devs) 749 break; 750 } 751 if (bootverbose) 752 printf("PNP Identify complete\n"); 753 } 754 755 static device_method_t pnp_methods[] = { 756 /* Device interface */ 757 DEVMETHOD(device_identify, pnp_identify), 758 759 { 0, 0 } 760 }; 761 762 static driver_t pnp_driver = { 763 "pnp", 764 pnp_methods, 765 1, /* no softc */ 766 }; 767 768 DRIVER_MODULE(pnp, isa, pnp_driver, 0, 0); 769