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/param.h> 32 #include <sys/systm.h> 33 #include <sys/kernel.h> 34 #include <sys/module.h> 35 #include <sys/bus.h> 36 #include <sys/endian.h> 37 #include <sys/malloc.h> 38 #include <isa/isavar.h> 39 #include <isa/pnpreg.h> 40 #include <isa/pnpvar.h> 41 #include <machine/bus.h> 42 43 typedef struct _pnp_id { 44 uint32_t vendor_id; 45 uint32_t serial; 46 u_char checksum; 47 } pnp_id; 48 49 struct pnp_set_config_arg { 50 int csn; /* Card number to configure */ 51 int ldn; /* Logical device on card */ 52 }; 53 54 struct pnp_quirk { 55 uint32_t vendor_id; /* Vendor of the card */ 56 uint32_t logical_id; /* ID of the device with quirk */ 57 int type; 58 #define PNP_QUIRK_WRITE_REG 1 /* Need to write a pnp register */ 59 #define PNP_QUIRK_EXTRA_IO 2 /* Has extra io ports */ 60 int arg1; 61 int arg2; 62 }; 63 64 struct pnp_quirk pnp_quirks[] = { 65 /* 66 * The Gravis UltraSound needs register 0xf2 to be set to 0xff 67 * to enable power. 68 * XXX need to know the logical device id. 69 */ 70 { 0x0100561e /* GRV0001 */, 0, 71 PNP_QUIRK_WRITE_REG, 0xf2, 0xff }, 72 /* 73 * An emu8000 does not give us other than the first 74 * port. 75 */ 76 { 0x26008c0e /* SB16 */, 0x21008c0e, 77 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 78 { 0x42008c0e /* SB32(CTL0042) */, 0x21008c0e, 79 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 80 { 0x44008c0e /* SB32(CTL0044) */, 0x21008c0e, 81 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 82 { 0x49008c0e /* SB32(CTL0049) */, 0x21008c0e, 83 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 84 { 0xf1008c0e /* SB32(CTL00f1) */, 0x21008c0e, 85 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 86 { 0xc1008c0e /* SB64(CTL00c1) */, 0x22008c0e, 87 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 88 { 0xc5008c0e /* SB64(CTL00c5) */, 0x22008c0e, 89 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 90 { 0xe4008c0e /* SB64(CTL00e4) */, 0x22008c0e, 91 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 92 93 { 0 } 94 }; 95 96 /* The READ_DATA port that we are using currently */ 97 static int pnp_rd_port; 98 99 static void pnp_send_initiation_key(void); 100 static int pnp_get_serial(pnp_id *p); 101 static int pnp_isolation_protocol(device_t parent); 102 103 static void 104 pnp_write(int d, u_char r) 105 { 106 outb (_PNP_ADDRESS, d); 107 outb (_PNP_WRITE_DATA, r); 108 } 109 110 /* 111 * Send Initiation LFSR as described in "Plug and Play ISA Specification", 112 * Intel May 94. 113 */ 114 static void 115 pnp_send_initiation_key(void) 116 { 117 int cur, i; 118 119 /* Reset the LSFR */ 120 outb(_PNP_ADDRESS, 0); 121 outb(_PNP_ADDRESS, 0); /* yes, we do need it twice! */ 122 123 cur = 0x6a; 124 outb(_PNP_ADDRESS, cur); 125 126 for (i = 1; i < 32; i++) { 127 cur = (cur >> 1) | (((cur ^ (cur >> 1)) << 7) & 0xff); 128 outb(_PNP_ADDRESS, cur); 129 } 130 } 131 132 133 /* 134 * Get the device's serial number. Returns 1 if the serial is valid. 135 */ 136 static int 137 pnp_get_serial(pnp_id *p) 138 { 139 int i, bit, valid = 0, sum = 0x6a; 140 u_char *data = (u_char *)p; 141 142 bzero(data, sizeof(char) * 9); 143 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); 144 for (i = 0; i < 72; i++) { 145 bit = inb((pnp_rd_port << 2) | 0x3) == 0x55; 146 DELAY(250); /* Delay 250 usec */ 147 148 /* Can't Short Circuit the next evaluation, so 'and' is last */ 149 bit = (inb((pnp_rd_port << 2) | 0x3) == 0xaa) && bit; 150 DELAY(250); /* Delay 250 usec */ 151 152 valid = valid || bit; 153 if (i < 64) 154 sum = (sum >> 1) | 155 (((sum ^ (sum >> 1) ^ bit) << 7) & 0xff); 156 data[i / 8] = (data[i / 8] >> 1) | (bit ? 0x80 : 0); 157 } 158 159 valid = valid && (data[8] == sum); 160 161 return (valid); 162 } 163 164 /* 165 * Fill's the buffer with resource info from the device. 166 * Returns the number of characters read. 167 */ 168 static int 169 pnp_get_resource_info(u_char *buffer, int len) 170 { 171 int i, j, count; 172 u_char temp; 173 174 count = 0; 175 for (i = 0; i < len; i++) { 176 outb(_PNP_ADDRESS, PNP_STATUS); 177 for (j = 0; j < 100; j++) { 178 if ((inb((pnp_rd_port << 2) | 0x3)) & 0x1) 179 break; 180 DELAY(10); 181 } 182 if (j == 100) { 183 printf("PnP device failed to report resource data\n"); 184 return (count); 185 } 186 outb(_PNP_ADDRESS, PNP_RESOURCE_DATA); 187 temp = inb((pnp_rd_port << 2) | 0x3); 188 if (buffer != NULL) 189 buffer[i] = temp; 190 count++; 191 } 192 return (count); 193 } 194 195 /* 196 * This function is called after the bus has assigned resource 197 * locations for a logical device. 198 */ 199 static void 200 pnp_set_config(void *arg, struct isa_config *config, int enable) 201 { 202 int csn = ((struct pnp_set_config_arg *) arg)->csn; 203 int ldn = ((struct pnp_set_config_arg *) arg)->ldn; 204 int i; 205 206 /* 207 * First put all cards into Sleep state with the initiation 208 * key, then put our card into Config state. 209 */ 210 pnp_send_initiation_key(); 211 pnp_write(PNP_WAKE, csn); 212 213 /* 214 * Select our logical device so that we can program it. 215 */ 216 pnp_write(PNP_SET_LDN, ldn); 217 218 /* 219 * Constrain the number of resources we will try to program 220 */ 221 if (config->ic_nmem > ISA_PNP_NMEM) { 222 printf("too many ISA memory ranges (%d > %d)\n", 223 config->ic_nmem, ISA_PNP_NMEM); 224 config->ic_nmem = ISA_PNP_NMEM; 225 } 226 if (config->ic_nport > ISA_PNP_NPORT) { 227 printf("too many ISA I/O ranges (%d > %d)\n", config->ic_nport, 228 ISA_PNP_NPORT); 229 config->ic_nport = ISA_PNP_NPORT; 230 } 231 if (config->ic_nirq > ISA_PNP_NIRQ) { 232 printf("too many ISA IRQs (%d > %d)\n", config->ic_nirq, 233 ISA_PNP_NIRQ); 234 config->ic_nirq = ISA_PNP_NIRQ; 235 } 236 if (config->ic_ndrq > ISA_PNP_NDRQ) { 237 printf("too many ISA DRQs (%d > %d)\n", config->ic_ndrq, 238 ISA_PNP_NDRQ); 239 config->ic_ndrq = ISA_PNP_NDRQ; 240 } 241 242 /* 243 * Now program the resources. 244 */ 245 for (i = 0; i < config->ic_nmem; i++) { 246 uint32_t start; 247 uint32_t size; 248 249 /* XXX: should handle memory control register, 32 bit memory */ 250 if (config->ic_mem[i].ir_size == 0) { 251 pnp_write(PNP_MEM_BASE_HIGH(i), 0); 252 pnp_write(PNP_MEM_BASE_LOW(i), 0); 253 pnp_write(PNP_MEM_RANGE_HIGH(i), 0); 254 pnp_write(PNP_MEM_RANGE_LOW(i), 0); 255 } else { 256 start = config->ic_mem[i].ir_start; 257 size = config->ic_mem[i].ir_size; 258 if (start & 0xff) 259 panic("pnp_set_config: bogus memory assignment"); 260 pnp_write(PNP_MEM_BASE_HIGH(i), (start >> 16) & 0xff); 261 pnp_write(PNP_MEM_BASE_LOW(i), (start >> 8) & 0xff); 262 pnp_write(PNP_MEM_RANGE_HIGH(i), (size >> 16) & 0xff); 263 pnp_write(PNP_MEM_RANGE_LOW(i), (size >> 8) & 0xff); 264 } 265 } 266 for (; i < ISA_PNP_NMEM; i++) { 267 pnp_write(PNP_MEM_BASE_HIGH(i), 0); 268 pnp_write(PNP_MEM_BASE_LOW(i), 0); 269 pnp_write(PNP_MEM_RANGE_HIGH(i), 0); 270 pnp_write(PNP_MEM_RANGE_LOW(i), 0); 271 } 272 273 for (i = 0; i < config->ic_nport; i++) { 274 uint32_t start; 275 276 if (config->ic_port[i].ir_size == 0) { 277 pnp_write(PNP_IO_BASE_HIGH(i), 0); 278 pnp_write(PNP_IO_BASE_LOW(i), 0); 279 } else { 280 start = config->ic_port[i].ir_start; 281 pnp_write(PNP_IO_BASE_HIGH(i), (start >> 8) & 0xff); 282 pnp_write(PNP_IO_BASE_LOW(i), (start >> 0) & 0xff); 283 } 284 } 285 for (; i < ISA_PNP_NPORT; i++) { 286 pnp_write(PNP_IO_BASE_HIGH(i), 0); 287 pnp_write(PNP_IO_BASE_LOW(i), 0); 288 } 289 290 for (i = 0; i < config->ic_nirq; i++) { 291 int irq; 292 293 /* XXX: interrupt type */ 294 if (config->ic_irqmask[i] == 0) { 295 pnp_write(PNP_IRQ_LEVEL(i), 0); 296 pnp_write(PNP_IRQ_TYPE(i), 2); 297 } else { 298 irq = ffs(config->ic_irqmask[i]) - 1; 299 pnp_write(PNP_IRQ_LEVEL(i), irq); 300 pnp_write(PNP_IRQ_TYPE(i), 2); /* XXX */ 301 } 302 } 303 for (; i < ISA_PNP_NIRQ; i++) { 304 /* 305 * IRQ 0 is not a valid interrupt selection and 306 * represents no interrupt selection. 307 */ 308 pnp_write(PNP_IRQ_LEVEL(i), 0); 309 pnp_write(PNP_IRQ_TYPE(i), 2); 310 } 311 312 for (i = 0; i < config->ic_ndrq; i++) { 313 int drq; 314 315 if (config->ic_drqmask[i] == 0) { 316 pnp_write(PNP_DMA_CHANNEL(i), 4); 317 } else { 318 drq = ffs(config->ic_drqmask[i]) - 1; 319 pnp_write(PNP_DMA_CHANNEL(i), drq); 320 } 321 } 322 for (; i < ISA_PNP_NDRQ; i++) { 323 /* 324 * DMA channel 4, the cascade channel is used to 325 * indicate no DMA channel is active. 326 */ 327 pnp_write(PNP_DMA_CHANNEL(i), 4); 328 } 329 330 pnp_write(PNP_ACTIVATE, enable ? 1 : 0); 331 332 /* 333 * Wake everyone up again, we are finished. 334 */ 335 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); 336 } 337 338 /* 339 * Process quirks for a logical device.. The card must be in Config state. 340 */ 341 void 342 pnp_check_quirks(uint32_t vendor_id, uint32_t logical_id, int ldn, 343 struct isa_config *config) 344 { 345 struct pnp_quirk *qp; 346 347 for (qp = &pnp_quirks[0]; qp->vendor_id; qp++) { 348 if (qp->vendor_id == vendor_id 349 && (qp->logical_id == 0 || qp->logical_id == logical_id)) { 350 switch (qp->type) { 351 case PNP_QUIRK_WRITE_REG: 352 pnp_write(PNP_SET_LDN, ldn); 353 pnp_write(qp->arg1, qp->arg2); 354 break; 355 case PNP_QUIRK_EXTRA_IO: 356 if (config == NULL) 357 break; 358 if (qp->arg1 != 0) { 359 config->ic_nport++; 360 config->ic_port[config->ic_nport - 1] = config->ic_port[0]; 361 config->ic_port[config->ic_nport - 1].ir_start += qp->arg1; 362 config->ic_port[config->ic_nport - 1].ir_end += qp->arg1; 363 } 364 if (qp->arg2 != 0) { 365 config->ic_nport++; 366 config->ic_port[config->ic_nport - 1] = config->ic_port[0]; 367 config->ic_port[config->ic_nport - 1].ir_start += qp->arg2; 368 config->ic_port[config->ic_nport - 1].ir_end += qp->arg2; 369 } 370 break; 371 } 372 } 373 } 374 } 375 376 /* 377 * Scan Resource Data for Logical Devices. 378 * 379 * This function exits as soon as it gets an error reading *ANY* 380 * Resource Data or it reaches the end of Resource Data. In the first 381 * case the return value will be TRUE, FALSE otherwise. 382 */ 383 static int 384 pnp_create_devices(device_t parent, pnp_id *p, int csn, 385 u_char *resources, int len) 386 { 387 u_char tag, *resp, *resinfo, *startres = NULL; 388 int large_len, scanning = len, retval = FALSE; 389 uint32_t logical_id; 390 device_t dev = 0; 391 int ldn = 0; 392 struct pnp_set_config_arg *csnldn; 393 char buf[100]; 394 char *desc = NULL; 395 396 resp = resources; 397 while (scanning > 0) { 398 tag = *resp++; 399 scanning--; 400 if (PNP_RES_TYPE(tag) != 0) { 401 /* Large resource */ 402 if (scanning < 2) { 403 scanning = 0; 404 continue; 405 } 406 large_len = resp[0] + (resp[1] << 8); 407 resp += 2; 408 409 if (scanning < large_len) { 410 scanning = 0; 411 continue; 412 } 413 resinfo = resp; 414 resp += large_len; 415 scanning -= large_len; 416 417 if (PNP_LRES_NUM(tag) == PNP_TAG_ID_ANSI) { 418 if (dev) { 419 /* 420 * This is an optional device 421 * identifier string. Skip it 422 * for now. 423 */ 424 continue; 425 } 426 /* else mandately card identifier string */ 427 if (large_len > sizeof(buf) - 1) 428 large_len = sizeof(buf) - 1; 429 bcopy(resinfo, buf, large_len); 430 431 /* 432 * Trim trailing spaces. 433 */ 434 while (buf[large_len-1] == ' ') 435 large_len--; 436 buf[large_len] = '\0'; 437 desc = buf; 438 continue; 439 } 440 441 continue; 442 } 443 444 /* Small resource */ 445 if (scanning < PNP_SRES_LEN(tag)) { 446 scanning = 0; 447 continue; 448 } 449 resinfo = resp; 450 resp += PNP_SRES_LEN(tag); 451 scanning -= PNP_SRES_LEN(tag); 452 453 switch (PNP_SRES_NUM(tag)) { 454 case PNP_TAG_LOGICAL_DEVICE: 455 /* 456 * Parse the resources for the previous 457 * logical device (if any). 458 */ 459 if (startres) { 460 pnp_parse_resources(dev, startres, 461 resinfo - startres - 1, ldn); 462 dev = 0; 463 startres = NULL; 464 } 465 466 /* 467 * A new logical device. Scan for end of 468 * resources. 469 */ 470 bcopy(resinfo, &logical_id, 4); 471 pnp_check_quirks(p->vendor_id, logical_id, ldn, NULL); 472 dev = BUS_ADD_CHILD(parent, ISA_ORDER_PNP, NULL, -1); 473 if (desc) 474 device_set_desc_copy(dev, desc); 475 else 476 device_set_desc_copy(dev, 477 pnp_eisaformat(logical_id)); 478 isa_set_vendorid(dev, p->vendor_id); 479 isa_set_serial(dev, p->serial); 480 isa_set_logicalid(dev, logical_id); 481 isa_set_configattr(dev, 482 ISACFGATTR_CANDISABLE | ISACFGATTR_DYNAMIC); 483 csnldn = malloc(sizeof *csnldn, M_DEVBUF, M_NOWAIT); 484 if (!csnldn) { 485 device_printf(parent, "out of memory\n"); 486 scanning = 0; 487 break; 488 } 489 csnldn->csn = csn; 490 csnldn->ldn = ldn; 491 ISA_SET_CONFIG_CALLBACK(parent, dev, pnp_set_config, 492 csnldn); 493 isa_set_pnp_csn(dev, csn); 494 isa_set_pnp_ldn(dev, ldn); 495 ldn++; 496 startres = resp; 497 break; 498 499 case PNP_TAG_END: 500 if (!startres) { 501 device_printf(parent, "malformed resources\n"); 502 scanning = 0; 503 break; 504 } 505 pnp_parse_resources(dev, startres, 506 resinfo - startres - 1, ldn); 507 dev = 0; 508 startres = NULL; 509 scanning = 0; 510 break; 511 512 default: 513 /* Skip this resource */ 514 break; 515 } 516 } 517 518 return (retval); 519 } 520 521 /* 522 * Read 'amount' bytes of resources from the card, allocating memory 523 * as needed. If a buffer is already available, it should be passed in 524 * '*resourcesp' and its length in '*spacep'. The number of resource 525 * bytes already in the buffer should be passed in '*lenp'. The memory 526 * allocated will be returned in '*resourcesp' with its size and the 527 * number of bytes of resources in '*spacep' and '*lenp' respectively. 528 * 529 * XXX: Multiple problems here, we forget to free() stuff in one 530 * XXX: error return, and in another case we free (*resourcesp) but 531 * XXX: don't tell the caller. 532 */ 533 static int 534 pnp_read_bytes(int amount, u_char **resourcesp, int *spacep, int *lenp) 535 { 536 u_char *resources = *resourcesp; 537 u_char *newres; 538 int space = *spacep; 539 int len = *lenp; 540 541 if (space == 0) { 542 space = 1024; 543 resources = malloc(space, M_TEMP, M_NOWAIT); 544 if (!resources) 545 return (ENOMEM); 546 } 547 548 if (len + amount > space) { 549 int extra = 1024; 550 while (len + amount > space + extra) 551 extra += 1024; 552 newres = malloc(space + extra, M_TEMP, M_NOWAIT); 553 if (!newres) { 554 /* XXX: free resources */ 555 return (ENOMEM); 556 } 557 bcopy(resources, newres, len); 558 free(resources, M_TEMP); 559 resources = newres; 560 space += extra; 561 } 562 563 if (pnp_get_resource_info(resources + len, amount) != amount) 564 return (EINVAL); 565 len += amount; 566 567 *resourcesp = resources; 568 *spacep = space; 569 *lenp = len; 570 571 return (0); 572 } 573 574 /* 575 * Read all resources from the card, allocating memory as needed. If a 576 * buffer is already available, it should be passed in '*resourcesp' 577 * and its length in '*spacep'. The memory allocated will be returned 578 * in '*resourcesp' with its size and the number of bytes of resources 579 * in '*spacep' and '*lenp' respectively. 580 */ 581 static int 582 pnp_read_resources(u_char **resourcesp, int *spacep, int *lenp) 583 { 584 u_char *resources = *resourcesp; 585 int space = *spacep; 586 int len = 0; 587 int error, done; 588 u_char tag; 589 590 error = 0; 591 done = 0; 592 while (!done) { 593 error = pnp_read_bytes(1, &resources, &space, &len); 594 if (error) 595 goto out; 596 tag = resources[len-1]; 597 if (PNP_RES_TYPE(tag) == 0) { 598 /* 599 * Small resource, read contents. 600 */ 601 error = pnp_read_bytes(PNP_SRES_LEN(tag), 602 &resources, &space, &len); 603 if (error) 604 goto out; 605 if (PNP_SRES_NUM(tag) == PNP_TAG_END) 606 done = 1; 607 } else { 608 /* 609 * Large resource, read length and contents. 610 */ 611 error = pnp_read_bytes(2, &resources, &space, &len); 612 if (error) 613 goto out; 614 error = pnp_read_bytes(resources[len-2] 615 + (resources[len-1] << 8), &resources, &space, 616 &len); 617 if (error) 618 goto out; 619 } 620 } 621 622 out: 623 *resourcesp = resources; 624 *spacep = space; 625 *lenp = len; 626 return (error); 627 } 628 629 /* 630 * Run the isolation protocol. Use pnp_rd_port as the READ_DATA port 631 * value (caller should try multiple READ_DATA locations before giving 632 * up). Upon exiting, all cards are aware that they should use 633 * pnp_rd_port as the READ_DATA port. 634 * 635 * In the first pass, a csn is assigned to each board and pnp_id's 636 * are saved to an array, pnp_devices. In the second pass, each 637 * card is woken up and the device configuration is called. 638 */ 639 static int 640 pnp_isolation_protocol(device_t parent) 641 { 642 int csn; 643 pnp_id id; 644 int found = 0, len; 645 u_char *resources = NULL; 646 int space = 0; 647 int error; 648 649 /* 650 * Put all cards into the Sleep state so that we can clear 651 * their CSNs. 652 */ 653 pnp_send_initiation_key(); 654 655 /* 656 * Clear the CSN for all cards. 657 */ 658 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_RESET_CSN); 659 660 /* 661 * Move all cards to the Isolation state. 662 */ 663 pnp_write(PNP_WAKE, 0); 664 665 /* 666 * Tell them where the read point is going to be this time. 667 */ 668 pnp_write(PNP_SET_RD_DATA, pnp_rd_port); 669 670 for (csn = 1; csn < PNP_MAX_CARDS; csn++) { 671 /* 672 * Start the serial isolation protocol. 673 */ 674 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); 675 DELAY(1000); /* Delay 1 msec */ 676 677 if (pnp_get_serial(&id)) { 678 /* 679 * We have read the id from a card 680 * successfully. The card which won the 681 * isolation protocol will be in Isolation 682 * mode and all others will be in Sleep. 683 * Program the CSN of the isolated card 684 * (taking it to Config state) and read its 685 * resources, creating devices as we find 686 * logical devices on the card. 687 */ 688 pnp_write(PNP_SET_CSN, csn); 689 if (bootverbose) 690 printf("Reading PnP configuration for %s.\n", 691 pnp_eisaformat(id.vendor_id)); 692 error = pnp_read_resources(&resources, &space, &len); 693 if (error) 694 break; 695 pnp_create_devices(parent, &id, csn, resources, len); 696 found++; 697 } else 698 break; 699 700 /* 701 * Put this card back to the Sleep state and 702 * simultaneously move all cards which don't have a 703 * CSN yet to Isolation state. 704 */ 705 pnp_write(PNP_WAKE, 0); 706 } 707 708 /* 709 * Unless we have chosen the wrong read port, all cards will 710 * be in Sleep state. Put them back into WaitForKey for 711 * now. Their resources will be programmed later. 712 */ 713 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); 714 715 /* 716 * Cleanup. 717 */ 718 if (resources) 719 free(resources, M_TEMP); 720 721 return (found); 722 } 723 724 725 /* 726 * pnp_identify() 727 * 728 * autoconfiguration of pnp devices. This routine just runs the 729 * isolation protocol over several ports, until one is successful. 730 * 731 * may be called more than once ? 732 * 733 */ 734 735 static void 736 pnp_identify(driver_t *driver, device_t parent) 737 { 738 int num_pnp_devs; 739 740 /* Try various READ_DATA ports from 0x203-0x3ff */ 741 for (pnp_rd_port = 0x80; (pnp_rd_port < 0xff); pnp_rd_port += 0x10) { 742 if (bootverbose) 743 printf("pnp_identify: Trying Read_Port at %x\n", 744 (pnp_rd_port << 2) | 0x3); 745 746 num_pnp_devs = pnp_isolation_protocol(parent); 747 if (num_pnp_devs) 748 break; 749 } 750 if (bootverbose) 751 printf("PNP Identify complete\n"); 752 } 753 754 static device_method_t pnp_methods[] = { 755 /* Device interface */ 756 DEVMETHOD(device_identify, pnp_identify), 757 758 { 0, 0 } 759 }; 760 761 static driver_t pnp_driver = { 762 "pnp", 763 pnp_methods, 764 1, /* no softc */ 765 }; 766 767 DRIVER_MODULE(pnp, isa, pnp_driver, 0, 0); 768