1 /* 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/module.h> 38 #include <sys/bus.h> 39 #include <sys/endian.h> 40 #include <sys/malloc.h> 41 #include <isa/isavar.h> 42 #include <isa/pnpreg.h> 43 #include <isa/pnpvar.h> 44 #include <machine/bus.h> 45 46 typedef struct _pnp_id { 47 uint32_t vendor_id; 48 uint32_t serial; 49 u_char checksum; 50 } pnp_id; 51 52 struct pnp_set_config_arg { 53 int csn; /* Card number to configure */ 54 int ldn; /* Logical device on card */ 55 }; 56 57 struct pnp_quirk { 58 uint32_t vendor_id; /* Vendor of the card */ 59 uint32_t logical_id; /* ID of the device with quirk */ 60 int type; 61 #define PNP_QUIRK_WRITE_REG 1 /* Need to write a pnp register */ 62 #define PNP_QUIRK_EXTRA_IO 2 /* Has extra io ports */ 63 int arg1; 64 int arg2; 65 }; 66 67 struct pnp_quirk pnp_quirks[] = { 68 /* 69 * The Gravis UltraSound needs register 0xf2 to be set to 0xff 70 * to enable power. 71 * XXX need to know the logical device id. 72 */ 73 { 0x0100561e /* GRV0001 */, 0, 74 PNP_QUIRK_WRITE_REG, 0xf2, 0xff }, 75 /* 76 * An emu8000 does not give us other than the first 77 * port. 78 */ 79 { 0x26008c0e /* SB16 */, 0x21008c0e, 80 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 81 { 0x42008c0e /* SB32(CTL0042) */, 0x21008c0e, 82 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 83 { 0x44008c0e /* SB32(CTL0044) */, 0x21008c0e, 84 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 85 { 0x49008c0e /* SB32(CTL0049) */, 0x21008c0e, 86 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 87 { 0xf1008c0e /* SB32(CTL00f1) */, 0x21008c0e, 88 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 89 { 0xc1008c0e /* SB64(CTL00c1) */, 0x22008c0e, 90 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 91 { 0xc5008c0e /* SB64(CTL00c5) */, 0x22008c0e, 92 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 93 { 0xe4008c0e /* SB64(CTL00e4) */, 0x22008c0e, 94 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 95 96 { 0 } 97 }; 98 99 /* The READ_DATA port that we are using currently */ 100 static int pnp_rd_port; 101 102 static void pnp_send_initiation_key(void); 103 static int pnp_get_serial(pnp_id *p); 104 static int pnp_isolation_protocol(device_t parent); 105 106 char * 107 pnp_eisaformat(uint32_t id) 108 { 109 uint8_t *data; 110 static char idbuf[8]; 111 const char hextoascii[] = "0123456789abcdef"; 112 113 id = htole32(id); 114 data = (uint8_t *)&id; 115 idbuf[0] = '@' + ((data[0] & 0x7c) >> 2); 116 idbuf[1] = '@' + (((data[0] & 0x3) << 3) + ((data[1] & 0xe0) >> 5)); 117 idbuf[2] = '@' + (data[1] & 0x1f); 118 idbuf[3] = hextoascii[(data[2] >> 4)]; 119 idbuf[4] = hextoascii[(data[2] & 0xf)]; 120 idbuf[5] = hextoascii[(data[3] >> 4)]; 121 idbuf[6] = hextoascii[(data[3] & 0xf)]; 122 idbuf[7] = 0; 123 return(idbuf); 124 } 125 126 static void 127 pnp_write(int d, u_char r) 128 { 129 outb (_PNP_ADDRESS, d); 130 outb (_PNP_WRITE_DATA, r); 131 } 132 133 /* 134 * Send Initiation LFSR as described in "Plug and Play ISA Specification", 135 * Intel May 94. 136 */ 137 static void 138 pnp_send_initiation_key() 139 { 140 int cur, i; 141 142 /* Reset the LSFR */ 143 outb(_PNP_ADDRESS, 0); 144 outb(_PNP_ADDRESS, 0); /* yes, we do need it twice! */ 145 146 cur = 0x6a; 147 outb(_PNP_ADDRESS, cur); 148 149 for (i = 1; i < 32; i++) { 150 cur = (cur >> 1) | (((cur ^ (cur >> 1)) << 7) & 0xff); 151 outb(_PNP_ADDRESS, cur); 152 } 153 } 154 155 156 /* 157 * Get the device's serial number. Returns 1 if the serial is valid. 158 */ 159 static int 160 pnp_get_serial(pnp_id *p) 161 { 162 int i, bit, valid = 0, sum = 0x6a; 163 u_char *data = (u_char *)p; 164 165 bzero(data, sizeof(char) * 9); 166 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); 167 for (i = 0; i < 72; i++) { 168 bit = inb((pnp_rd_port << 2) | 0x3) == 0x55; 169 DELAY(250); /* Delay 250 usec */ 170 171 /* Can't Short Circuit the next evaluation, so 'and' is last */ 172 bit = (inb((pnp_rd_port << 2) | 0x3) == 0xaa) && bit; 173 DELAY(250); /* Delay 250 usec */ 174 175 valid = valid || bit; 176 if (i < 64) 177 sum = (sum >> 1) | 178 (((sum ^ (sum >> 1) ^ bit) << 7) & 0xff); 179 data[i / 8] = (data[i / 8] >> 1) | (bit ? 0x80 : 0); 180 } 181 182 valid = valid && (data[8] == sum); 183 184 return (valid); 185 } 186 187 /* 188 * Fill's the buffer with resource info from the device. 189 * Returns the number of characters read. 190 */ 191 static int 192 pnp_get_resource_info(u_char *buffer, int len) 193 { 194 int i, j, count; 195 u_char temp; 196 197 count = 0; 198 for (i = 0; i < len; i++) { 199 outb(_PNP_ADDRESS, PNP_STATUS); 200 for (j = 0; j < 100; j++) { 201 if ((inb((pnp_rd_port << 2) | 0x3)) & 0x1) 202 break; 203 DELAY(10); 204 } 205 if (j == 100) { 206 printf("PnP device failed to report resource data\n"); 207 return (count); 208 } 209 outb(_PNP_ADDRESS, PNP_RESOURCE_DATA); 210 temp = inb((pnp_rd_port << 2) | 0x3); 211 if (buffer != NULL) 212 buffer[i] = temp; 213 count++; 214 } 215 return (count); 216 } 217 218 /* 219 * This function is called after the bus has assigned resource 220 * locations for a logical device. 221 */ 222 static void 223 pnp_set_config(void *arg, struct isa_config *config, int enable) 224 { 225 int csn = ((struct pnp_set_config_arg *) arg)->csn; 226 int ldn = ((struct pnp_set_config_arg *) arg)->ldn; 227 int i; 228 229 /* 230 * First put all cards into Sleep state with the initiation 231 * key, then put our card into Config state. 232 */ 233 pnp_send_initiation_key(); 234 pnp_write(PNP_WAKE, csn); 235 236 /* 237 * Select our logical device so that we can program it. 238 */ 239 pnp_write(PNP_SET_LDN, ldn); 240 241 /* 242 * Constrain the number of resources we will try to program 243 */ 244 if (config->ic_nmem > ISA_PNP_NMEM) { 245 printf("too many ISA memory ranges (%d > %d)\n", 246 config->ic_nmem, ISA_PNP_NMEM); 247 config->ic_nmem = ISA_PNP_NMEM; 248 } 249 if (config->ic_nport > ISA_PNP_NPORT) { 250 printf("too many ISA I/O ranges (%d > %d)\n", config->ic_nport, 251 ISA_PNP_NPORT); 252 config->ic_nport = ISA_PNP_NPORT; 253 } 254 if (config->ic_nirq > ISA_PNP_NIRQ) { 255 printf("too many ISA IRQs (%d > %d)\n", config->ic_nirq, 256 ISA_PNP_NIRQ); 257 config->ic_nirq = ISA_PNP_NIRQ; 258 } 259 if (config->ic_ndrq > ISA_PNP_NDRQ) { 260 printf("too many ISA DRQs (%d > %d)\n", config->ic_ndrq, 261 ISA_PNP_NDRQ); 262 config->ic_ndrq = ISA_PNP_NDRQ; 263 } 264 265 /* 266 * Now program the resources. 267 */ 268 for (i = 0; i < config->ic_nmem; i++) { 269 uint32_t start; 270 uint32_t size; 271 272 /* XXX: should handle memory control register, 32 bit memory */ 273 if (config->ic_mem[i].ir_size == 0) { 274 pnp_write(PNP_MEM_BASE_HIGH(i), 0); 275 pnp_write(PNP_MEM_BASE_LOW(i), 0); 276 pnp_write(PNP_MEM_RANGE_HIGH(i), 0); 277 pnp_write(PNP_MEM_RANGE_LOW(i), 0); 278 } else { 279 start = config->ic_mem[i].ir_start; 280 size = config->ic_mem[i].ir_size; 281 if (start & 0xff) 282 panic("pnp_set_config: bogus memory assignment"); 283 pnp_write(PNP_MEM_BASE_HIGH(i), (start >> 16) & 0xff); 284 pnp_write(PNP_MEM_BASE_LOW(i), (start >> 8) & 0xff); 285 pnp_write(PNP_MEM_RANGE_HIGH(i), (size >> 16) & 0xff); 286 pnp_write(PNP_MEM_RANGE_LOW(i), (size >> 8) & 0xff); 287 } 288 } 289 for (; i < ISA_PNP_NMEM; i++) { 290 pnp_write(PNP_MEM_BASE_HIGH(i), 0); 291 pnp_write(PNP_MEM_BASE_LOW(i), 0); 292 pnp_write(PNP_MEM_RANGE_HIGH(i), 0); 293 pnp_write(PNP_MEM_RANGE_LOW(i), 0); 294 } 295 296 for (i = 0; i < config->ic_nport; i++) { 297 uint32_t start; 298 299 if (config->ic_port[i].ir_size == 0) { 300 pnp_write(PNP_IO_BASE_HIGH(i), 0); 301 pnp_write(PNP_IO_BASE_LOW(i), 0); 302 } else { 303 start = config->ic_port[i].ir_start; 304 pnp_write(PNP_IO_BASE_HIGH(i), (start >> 8) & 0xff); 305 pnp_write(PNP_IO_BASE_LOW(i), (start >> 0) & 0xff); 306 } 307 } 308 for (; i < ISA_PNP_NPORT; i++) { 309 pnp_write(PNP_IO_BASE_HIGH(i), 0); 310 pnp_write(PNP_IO_BASE_LOW(i), 0); 311 } 312 313 for (i = 0; i < config->ic_nirq; i++) { 314 int irq; 315 316 /* XXX: interrupt type */ 317 if (config->ic_irqmask[i] == 0) { 318 pnp_write(PNP_IRQ_LEVEL(i), 0); 319 pnp_write(PNP_IRQ_TYPE(i), 2); 320 } else { 321 irq = ffs(config->ic_irqmask[i]) - 1; 322 pnp_write(PNP_IRQ_LEVEL(i), irq); 323 pnp_write(PNP_IRQ_TYPE(i), 2); /* XXX */ 324 } 325 } 326 for (; i < ISA_PNP_NIRQ; i++) { 327 /* 328 * IRQ 0 is not a valid interrupt selection and 329 * represents no interrupt selection. 330 */ 331 pnp_write(PNP_IRQ_LEVEL(i), 0); 332 pnp_write(PNP_IRQ_TYPE(i), 2); 333 } 334 335 for (i = 0; i < config->ic_ndrq; i++) { 336 int drq; 337 338 if (config->ic_drqmask[i] == 0) { 339 pnp_write(PNP_DMA_CHANNEL(i), 4); 340 } else { 341 drq = ffs(config->ic_drqmask[i]) - 1; 342 pnp_write(PNP_DMA_CHANNEL(i), drq); 343 } 344 } 345 for (; i < ISA_PNP_NDRQ; i++) { 346 /* 347 * DMA channel 4, the cascade channel is used to 348 * indicate no DMA channel is active. 349 */ 350 pnp_write(PNP_DMA_CHANNEL(i), 4); 351 } 352 353 pnp_write(PNP_ACTIVATE, enable ? 1 : 0); 354 355 /* 356 * Wake everyone up again, we are finished. 357 */ 358 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); 359 } 360 361 /* 362 * Process quirks for a logical device.. The card must be in Config state. 363 */ 364 void 365 pnp_check_quirks(uint32_t vendor_id, uint32_t logical_id, int ldn, 366 struct isa_config *config) 367 { 368 struct pnp_quirk *qp; 369 370 for (qp = &pnp_quirks[0]; qp->vendor_id; qp++) { 371 if (qp->vendor_id == vendor_id 372 && (qp->logical_id == 0 || qp->logical_id == logical_id)) { 373 switch (qp->type) { 374 case PNP_QUIRK_WRITE_REG: 375 pnp_write(PNP_SET_LDN, ldn); 376 pnp_write(qp->arg1, qp->arg2); 377 break; 378 case PNP_QUIRK_EXTRA_IO: 379 if (config == NULL) 380 break; 381 if (qp->arg1 != 0) { 382 config->ic_nport++; 383 config->ic_port[config->ic_nport - 1] = config->ic_port[0]; 384 config->ic_port[config->ic_nport - 1].ir_start += qp->arg1; 385 config->ic_port[config->ic_nport - 1].ir_end += qp->arg1; 386 } 387 if (qp->arg2 != 0) { 388 config->ic_nport++; 389 config->ic_port[config->ic_nport - 1] = config->ic_port[0]; 390 config->ic_port[config->ic_nport - 1].ir_start += qp->arg2; 391 config->ic_port[config->ic_nport - 1].ir_end += qp->arg2; 392 } 393 break; 394 } 395 } 396 } 397 } 398 399 /* 400 * Scan Resource Data for Logical Devices. 401 * 402 * This function exits as soon as it gets an error reading *ANY* 403 * Resource Data or it reaches the end of Resource Data. In the first 404 * case the return value will be TRUE, FALSE otherwise. 405 */ 406 static int 407 pnp_create_devices(device_t parent, pnp_id *p, int csn, 408 u_char *resources, int len) 409 { 410 u_char tag, *resp, *resinfo, *startres = NULL; 411 int large_len, scanning = len, retval = FALSE; 412 uint32_t logical_id; 413 device_t dev = 0; 414 int ldn = 0; 415 struct pnp_set_config_arg *csnldn; 416 char buf[100]; 417 char *desc = NULL; 418 419 resp = resources; 420 while (scanning > 0) { 421 tag = *resp++; 422 scanning--; 423 if (PNP_RES_TYPE(tag) != 0) { 424 /* Large resource */ 425 if (scanning < 2) { 426 scanning = 0; 427 continue; 428 } 429 large_len = resp[0] + (resp[1] << 8); 430 resp += 2; 431 432 if (scanning < large_len) { 433 scanning = 0; 434 continue; 435 } 436 resinfo = resp; 437 resp += large_len; 438 scanning -= large_len; 439 440 if (PNP_LRES_NUM(tag) == PNP_TAG_ID_ANSI) { 441 if (dev) { 442 /* 443 * This is an optional device 444 * identifier string. Skip it 445 * for now. 446 */ 447 continue; 448 } 449 /* else mandately card identifier string */ 450 if (large_len > sizeof(buf) - 1) 451 large_len = sizeof(buf) - 1; 452 bcopy(resinfo, buf, large_len); 453 454 /* 455 * Trim trailing spaces. 456 */ 457 while (buf[large_len-1] == ' ') 458 large_len--; 459 buf[large_len] = '\0'; 460 desc = buf; 461 continue; 462 } 463 464 continue; 465 } 466 467 /* Small resource */ 468 if (scanning < PNP_SRES_LEN(tag)) { 469 scanning = 0; 470 continue; 471 } 472 resinfo = resp; 473 resp += PNP_SRES_LEN(tag); 474 scanning -= PNP_SRES_LEN(tag); 475 476 switch (PNP_SRES_NUM(tag)) { 477 case PNP_TAG_LOGICAL_DEVICE: 478 /* 479 * Parse the resources for the previous 480 * logical device (if any). 481 */ 482 if (startres) { 483 pnp_parse_resources(dev, startres, 484 resinfo - startres - 1, ldn); 485 dev = 0; 486 startres = NULL; 487 } 488 489 /* 490 * A new logical device. Scan for end of 491 * resources. 492 */ 493 bcopy(resinfo, &logical_id, 4); 494 pnp_check_quirks(p->vendor_id, logical_id, ldn, NULL); 495 dev = BUS_ADD_CHILD(parent, ISA_ORDER_PNP, NULL, -1); 496 if (desc) 497 device_set_desc_copy(dev, desc); 498 else 499 device_set_desc_copy(dev, 500 pnp_eisaformat(logical_id)); 501 isa_set_vendorid(dev, p->vendor_id); 502 isa_set_serial(dev, p->serial); 503 isa_set_logicalid(dev, logical_id); 504 isa_set_configattr(dev, 505 ISACFGATTR_CANDISABLE | ISACFGATTR_DYNAMIC); 506 csnldn = malloc(sizeof *csnldn, M_DEVBUF, M_NOWAIT); 507 if (!csnldn) { 508 device_printf(parent, "out of memory\n"); 509 scanning = 0; 510 break; 511 } 512 csnldn->csn = csn; 513 csnldn->ldn = ldn; 514 ISA_SET_CONFIG_CALLBACK(parent, dev, pnp_set_config, 515 csnldn); 516 isa_set_pnp_csn(dev, csn); 517 isa_set_pnp_ldn(dev, ldn); 518 ldn++; 519 startres = resp; 520 break; 521 522 case PNP_TAG_END: 523 if (!startres) { 524 device_printf(parent, "malformed resources\n"); 525 scanning = 0; 526 break; 527 } 528 pnp_parse_resources(dev, startres, 529 resinfo - startres - 1, ldn); 530 dev = 0; 531 startres = NULL; 532 scanning = 0; 533 break; 534 535 default: 536 /* Skip this resource */ 537 break; 538 } 539 } 540 541 return (retval); 542 } 543 544 /* 545 * Read 'amount' bytes of resources from the card, allocating memory 546 * as needed. If a buffer is already available, it should be passed in 547 * '*resourcesp' and its length in '*spacep'. The number of resource 548 * bytes already in the buffer should be passed in '*lenp'. The memory 549 * allocated will be returned in '*resourcesp' with its size and the 550 * number of bytes of resources in '*spacep' and '*lenp' respectively. 551 * 552 * XXX: Multiple problems here, we forget to free() stuff in one 553 * XXX: error return, and in another case we free (*resourcesp) but 554 * XXX: don't tell the caller. 555 */ 556 static int 557 pnp_read_bytes(int amount, u_char **resourcesp, int *spacep, int *lenp) 558 { 559 u_char *resources = *resourcesp; 560 u_char *newres; 561 int space = *spacep; 562 int len = *lenp; 563 564 if (space == 0) { 565 space = 1024; 566 resources = malloc(space, M_TEMP, M_NOWAIT); 567 if (!resources) 568 return (ENOMEM); 569 } 570 571 if (len + amount > space) { 572 int extra = 1024; 573 while (len + amount > space + extra) 574 extra += 1024; 575 newres = malloc(space + extra, M_TEMP, M_NOWAIT); 576 if (!newres) { 577 /* XXX: free resources */ 578 return (ENOMEM); 579 } 580 bcopy(resources, newres, len); 581 free(resources, M_TEMP); 582 resources = newres; 583 space += extra; 584 } 585 586 if (pnp_get_resource_info(resources + len, amount) != amount) 587 return (EINVAL); 588 len += amount; 589 590 *resourcesp = resources; 591 *spacep = space; 592 *lenp = len; 593 594 return (0); 595 } 596 597 /* 598 * Read all resources from the card, allocating memory as needed. If a 599 * buffer is already available, it should be passed in '*resourcesp' 600 * and its length in '*spacep'. The memory allocated will be returned 601 * in '*resourcesp' with its size and the number of bytes of resources 602 * in '*spacep' and '*lenp' respectively. 603 */ 604 static int 605 pnp_read_resources(u_char **resourcesp, int *spacep, int *lenp) 606 { 607 u_char *resources = *resourcesp; 608 int space = *spacep; 609 int len = 0; 610 int error, done; 611 u_char tag; 612 613 error = 0; 614 done = 0; 615 while (!done) { 616 error = pnp_read_bytes(1, &resources, &space, &len); 617 if (error) 618 goto out; 619 tag = resources[len-1]; 620 if (PNP_RES_TYPE(tag) == 0) { 621 /* 622 * Small resource, read contents. 623 */ 624 error = pnp_read_bytes(PNP_SRES_LEN(tag), 625 &resources, &space, &len); 626 if (error) 627 goto out; 628 if (PNP_SRES_NUM(tag) == PNP_TAG_END) 629 done = 1; 630 } else { 631 /* 632 * Large resource, read length and contents. 633 */ 634 error = pnp_read_bytes(2, &resources, &space, &len); 635 if (error) 636 goto out; 637 error = pnp_read_bytes(resources[len-2] 638 + (resources[len-1] << 8), &resources, &space, 639 &len); 640 if (error) 641 goto out; 642 } 643 } 644 645 out: 646 *resourcesp = resources; 647 *spacep = space; 648 *lenp = len; 649 return (error); 650 } 651 652 /* 653 * Run the isolation protocol. Use pnp_rd_port as the READ_DATA port 654 * value (caller should try multiple READ_DATA locations before giving 655 * up). Upon exiting, all cards are aware that they should use 656 * pnp_rd_port as the READ_DATA port. 657 * 658 * In the first pass, a csn is assigned to each board and pnp_id's 659 * are saved to an array, pnp_devices. In the second pass, each 660 * card is woken up and the device configuration is called. 661 */ 662 static int 663 pnp_isolation_protocol(device_t parent) 664 { 665 int csn; 666 pnp_id id; 667 int found = 0, len; 668 u_char *resources = NULL; 669 int space = 0; 670 int error; 671 672 /* 673 * Put all cards into the Sleep state so that we can clear 674 * their CSNs. 675 */ 676 pnp_send_initiation_key(); 677 678 /* 679 * Clear the CSN for all cards. 680 */ 681 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_RESET_CSN); 682 683 /* 684 * Move all cards to the Isolation state. 685 */ 686 pnp_write(PNP_WAKE, 0); 687 688 /* 689 * Tell them where the read point is going to be this time. 690 */ 691 pnp_write(PNP_SET_RD_DATA, pnp_rd_port); 692 693 for (csn = 1; csn < PNP_MAX_CARDS; csn++) { 694 /* 695 * Start the serial isolation protocol. 696 */ 697 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); 698 DELAY(1000); /* Delay 1 msec */ 699 700 if (pnp_get_serial(&id)) { 701 /* 702 * We have read the id from a card 703 * successfully. The card which won the 704 * isolation protocol will be in Isolation 705 * mode and all others will be in Sleep. 706 * Program the CSN of the isolated card 707 * (taking it to Config state) and read its 708 * resources, creating devices as we find 709 * logical devices on the card. 710 */ 711 pnp_write(PNP_SET_CSN, csn); 712 if (bootverbose) 713 printf("Reading PnP configuration for %s.\n", 714 pnp_eisaformat(id.vendor_id)); 715 error = pnp_read_resources(&resources, &space, &len); 716 if (error) 717 break; 718 pnp_create_devices(parent, &id, csn, resources, len); 719 found++; 720 } else 721 break; 722 723 /* 724 * Put this card back to the Sleep state and 725 * simultaneously move all cards which don't have a 726 * CSN yet to Isolation state. 727 */ 728 pnp_write(PNP_WAKE, 0); 729 } 730 731 /* 732 * Unless we have chosen the wrong read port, all cards will 733 * be in Sleep state. Put them back into WaitForKey for 734 * now. Their resources will be programmed later. 735 */ 736 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); 737 738 /* 739 * Cleanup. 740 */ 741 if (resources) 742 free(resources, M_TEMP); 743 744 return (found); 745 } 746 747 748 /* 749 * pnp_identify() 750 * 751 * autoconfiguration of pnp devices. This routine just runs the 752 * isolation protocol over several ports, until one is successful. 753 * 754 * may be called more than once ? 755 * 756 */ 757 758 static void 759 pnp_identify(driver_t *driver, device_t parent) 760 { 761 int num_pnp_devs; 762 763 /* Try various READ_DATA ports from 0x203-0x3ff */ 764 for (pnp_rd_port = 0x80; (pnp_rd_port < 0xff); pnp_rd_port += 0x10) { 765 if (bootverbose) 766 printf("pnp_identify: Trying Read_Port at %x\n", 767 (pnp_rd_port << 2) | 0x3); 768 769 num_pnp_devs = pnp_isolation_protocol(parent); 770 if (num_pnp_devs) 771 break; 772 } 773 if (bootverbose) 774 printf("PNP Identify complete\n"); 775 } 776 777 static device_method_t pnp_methods[] = { 778 /* Device interface */ 779 DEVMETHOD(device_identify, pnp_identify), 780 781 { 0, 0 } 782 }; 783 784 static driver_t pnp_driver = { 785 "pnp", 786 pnp_methods, 787 1, /* no softc */ 788 }; 789 790 static devclass_t pnp_devclass; 791 792 DRIVER_MODULE(pnp, isa, pnp_driver, pnp_devclass, 0, 0); 793