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 * from: pnp.c,v 1.11 1999/05/06 22:11:19 peter Exp 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 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 char * 105 pnp_eisaformat(uint32_t id) 106 { 107 uint8_t *data; 108 static char idbuf[8]; 109 const char hextoascii[] = "0123456789abcdef"; 110 111 id = htole32(id); 112 data = (uint8_t *)&id; 113 idbuf[0] = '@' + ((data[0] & 0x7c) >> 2); 114 idbuf[1] = '@' + (((data[0] & 0x3) << 3) + ((data[1] & 0xe0) >> 5)); 115 idbuf[2] = '@' + (data[1] & 0x1f); 116 idbuf[3] = hextoascii[(data[2] >> 4)]; 117 idbuf[4] = hextoascii[(data[2] & 0xf)]; 118 idbuf[5] = hextoascii[(data[3] >> 4)]; 119 idbuf[6] = hextoascii[(data[3] & 0xf)]; 120 idbuf[7] = 0; 121 return(idbuf); 122 } 123 124 static void 125 pnp_write(int d, u_char r) 126 { 127 outb (_PNP_ADDRESS, d); 128 outb (_PNP_WRITE_DATA, r); 129 } 130 131 /* 132 * Send Initiation LFSR as described in "Plug and Play ISA Specification", 133 * Intel May 94. 134 */ 135 static void 136 pnp_send_initiation_key() 137 { 138 int cur, i; 139 140 /* Reset the LSFR */ 141 outb(_PNP_ADDRESS, 0); 142 outb(_PNP_ADDRESS, 0); /* yes, we do need it twice! */ 143 144 cur = 0x6a; 145 outb(_PNP_ADDRESS, cur); 146 147 for (i = 1; i < 32; i++) { 148 cur = (cur >> 1) | (((cur ^ (cur >> 1)) << 7) & 0xff); 149 outb(_PNP_ADDRESS, cur); 150 } 151 } 152 153 154 /* 155 * Get the device's serial number. Returns 1 if the serial is valid. 156 */ 157 static int 158 pnp_get_serial(pnp_id *p) 159 { 160 int i, bit, valid = 0, sum = 0x6a; 161 u_char *data = (u_char *)p; 162 163 bzero(data, sizeof(char) * 9); 164 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); 165 for (i = 0; i < 72; i++) { 166 bit = inb((pnp_rd_port << 2) | 0x3) == 0x55; 167 DELAY(250); /* Delay 250 usec */ 168 169 /* Can't Short Circuit the next evaluation, so 'and' is last */ 170 bit = (inb((pnp_rd_port << 2) | 0x3) == 0xaa) && bit; 171 DELAY(250); /* Delay 250 usec */ 172 173 valid = valid || bit; 174 if (i < 64) 175 sum = (sum >> 1) | 176 (((sum ^ (sum >> 1) ^ bit) << 7) & 0xff); 177 data[i / 8] = (data[i / 8] >> 1) | (bit ? 0x80 : 0); 178 } 179 180 valid = valid && (data[8] == sum); 181 182 return (valid); 183 } 184 185 /* 186 * Fill's the buffer with resource info from the device. 187 * Returns the number of characters read. 188 */ 189 static int 190 pnp_get_resource_info(u_char *buffer, int len) 191 { 192 int i, j, count; 193 u_char temp; 194 195 count = 0; 196 for (i = 0; i < len; i++) { 197 outb(_PNP_ADDRESS, PNP_STATUS); 198 for (j = 0; j < 100; j++) { 199 if ((inb((pnp_rd_port << 2) | 0x3)) & 0x1) 200 break; 201 DELAY(10); 202 } 203 if (j == 100) { 204 printf("PnP device failed to report resource data\n"); 205 return (count); 206 } 207 outb(_PNP_ADDRESS, PNP_RESOURCE_DATA); 208 temp = inb((pnp_rd_port << 2) | 0x3); 209 if (buffer != NULL) 210 buffer[i] = temp; 211 count++; 212 } 213 return (count); 214 } 215 216 /* 217 * This function is called after the bus has assigned resource 218 * locations for a logical device. 219 */ 220 static void 221 pnp_set_config(void *arg, struct isa_config *config, int enable) 222 { 223 int csn = ((struct pnp_set_config_arg *) arg)->csn; 224 int ldn = ((struct pnp_set_config_arg *) arg)->ldn; 225 int i; 226 227 /* 228 * First put all cards into Sleep state with the initiation 229 * key, then put our card into Config state. 230 */ 231 pnp_send_initiation_key(); 232 pnp_write(PNP_WAKE, csn); 233 234 /* 235 * Select our logical device so that we can program it. 236 */ 237 pnp_write(PNP_SET_LDN, ldn); 238 239 /* 240 * Constrain the number of resources we will try to program 241 */ 242 if (config->ic_nmem > ISA_PNP_NMEM) { 243 printf("too many ISA memory ranges (%d > %d)\n", 244 config->ic_nmem, ISA_PNP_NMEM); 245 config->ic_nmem = ISA_PNP_NMEM; 246 } 247 if (config->ic_nport > ISA_PNP_NPORT) { 248 printf("too many ISA I/O ranges (%d > %d)\n", config->ic_nport, 249 ISA_PNP_NPORT); 250 config->ic_nport = ISA_PNP_NPORT; 251 } 252 if (config->ic_nirq > ISA_PNP_NIRQ) { 253 printf("too many ISA IRQs (%d > %d)\n", config->ic_nirq, 254 ISA_PNP_NIRQ); 255 config->ic_nirq = ISA_PNP_NIRQ; 256 } 257 if (config->ic_ndrq > ISA_PNP_NDRQ) { 258 printf("too many ISA DRQs (%d > %d)\n", config->ic_ndrq, 259 ISA_PNP_NDRQ); 260 config->ic_ndrq = ISA_PNP_NDRQ; 261 } 262 263 /* 264 * Now program the resources. 265 */ 266 for (i = 0; i < config->ic_nmem; i++) { 267 uint32_t start; 268 uint32_t size; 269 270 /* XXX: should handle memory control register, 32 bit memory */ 271 if (config->ic_mem[i].ir_size == 0) { 272 pnp_write(PNP_MEM_BASE_HIGH(i), 0); 273 pnp_write(PNP_MEM_BASE_LOW(i), 0); 274 pnp_write(PNP_MEM_RANGE_HIGH(i), 0); 275 pnp_write(PNP_MEM_RANGE_LOW(i), 0); 276 } else { 277 start = config->ic_mem[i].ir_start; 278 size = config->ic_mem[i].ir_size; 279 if (start & 0xff) 280 panic("pnp_set_config: bogus memory assignment"); 281 pnp_write(PNP_MEM_BASE_HIGH(i), (start >> 16) & 0xff); 282 pnp_write(PNP_MEM_BASE_LOW(i), (start >> 8) & 0xff); 283 pnp_write(PNP_MEM_RANGE_HIGH(i), (size >> 16) & 0xff); 284 pnp_write(PNP_MEM_RANGE_LOW(i), (size >> 8) & 0xff); 285 } 286 } 287 for (; i < ISA_PNP_NMEM; i++) { 288 pnp_write(PNP_MEM_BASE_HIGH(i), 0); 289 pnp_write(PNP_MEM_BASE_LOW(i), 0); 290 pnp_write(PNP_MEM_RANGE_HIGH(i), 0); 291 pnp_write(PNP_MEM_RANGE_LOW(i), 0); 292 } 293 294 for (i = 0; i < config->ic_nport; i++) { 295 uint32_t start; 296 297 if (config->ic_port[i].ir_size == 0) { 298 pnp_write(PNP_IO_BASE_HIGH(i), 0); 299 pnp_write(PNP_IO_BASE_LOW(i), 0); 300 } else { 301 start = config->ic_port[i].ir_start; 302 pnp_write(PNP_IO_BASE_HIGH(i), (start >> 8) & 0xff); 303 pnp_write(PNP_IO_BASE_LOW(i), (start >> 0) & 0xff); 304 } 305 } 306 for (; i < ISA_PNP_NPORT; i++) { 307 pnp_write(PNP_IO_BASE_HIGH(i), 0); 308 pnp_write(PNP_IO_BASE_LOW(i), 0); 309 } 310 311 for (i = 0; i < config->ic_nirq; i++) { 312 int irq; 313 314 /* XXX: interrupt type */ 315 if (config->ic_irqmask[i] == 0) { 316 pnp_write(PNP_IRQ_LEVEL(i), 0); 317 pnp_write(PNP_IRQ_TYPE(i), 2); 318 } else { 319 irq = ffs(config->ic_irqmask[i]) - 1; 320 pnp_write(PNP_IRQ_LEVEL(i), irq); 321 pnp_write(PNP_IRQ_TYPE(i), 2); /* XXX */ 322 } 323 } 324 for (; i < ISA_PNP_NIRQ; i++) { 325 /* 326 * IRQ 0 is not a valid interrupt selection and 327 * represents no interrupt selection. 328 */ 329 pnp_write(PNP_IRQ_LEVEL(i), 0); 330 pnp_write(PNP_IRQ_TYPE(i), 2); 331 } 332 333 for (i = 0; i < config->ic_ndrq; i++) { 334 int drq; 335 336 if (config->ic_drqmask[i] == 0) { 337 pnp_write(PNP_DMA_CHANNEL(i), 4); 338 } else { 339 drq = ffs(config->ic_drqmask[i]) - 1; 340 pnp_write(PNP_DMA_CHANNEL(i), drq); 341 } 342 } 343 for (; i < ISA_PNP_NDRQ; i++) { 344 /* 345 * DMA channel 4, the cascade channel is used to 346 * indicate no DMA channel is active. 347 */ 348 pnp_write(PNP_DMA_CHANNEL(i), 4); 349 } 350 351 pnp_write(PNP_ACTIVATE, enable ? 1 : 0); 352 353 /* 354 * Wake everyone up again, we are finished. 355 */ 356 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); 357 } 358 359 /* 360 * Process quirks for a logical device.. The card must be in Config state. 361 */ 362 void 363 pnp_check_quirks(uint32_t vendor_id, uint32_t logical_id, int ldn, 364 struct isa_config *config) 365 { 366 struct pnp_quirk *qp; 367 368 for (qp = &pnp_quirks[0]; qp->vendor_id; qp++) { 369 if (qp->vendor_id == vendor_id 370 && (qp->logical_id == 0 || qp->logical_id == logical_id)) { 371 switch (qp->type) { 372 case PNP_QUIRK_WRITE_REG: 373 pnp_write(PNP_SET_LDN, ldn); 374 pnp_write(qp->arg1, qp->arg2); 375 break; 376 case PNP_QUIRK_EXTRA_IO: 377 if (config == NULL) 378 break; 379 if (qp->arg1 != 0) { 380 config->ic_nport++; 381 config->ic_port[config->ic_nport - 1] = config->ic_port[0]; 382 config->ic_port[config->ic_nport - 1].ir_start += qp->arg1; 383 config->ic_port[config->ic_nport - 1].ir_end += qp->arg1; 384 } 385 if (qp->arg2 != 0) { 386 config->ic_nport++; 387 config->ic_port[config->ic_nport - 1] = config->ic_port[0]; 388 config->ic_port[config->ic_nport - 1].ir_start += qp->arg2; 389 config->ic_port[config->ic_nport - 1].ir_end += qp->arg2; 390 } 391 break; 392 } 393 } 394 } 395 } 396 397 /* 398 * Scan Resource Data for Logical Devices. 399 * 400 * This function exits as soon as it gets an error reading *ANY* 401 * Resource Data or it reaches the end of Resource Data. In the first 402 * case the return value will be TRUE, FALSE otherwise. 403 */ 404 static int 405 pnp_create_devices(device_t parent, pnp_id *p, int csn, 406 u_char *resources, int len) 407 { 408 u_char tag, *resp, *resinfo, *startres = NULL; 409 int large_len, scanning = len, retval = FALSE; 410 uint32_t logical_id; 411 device_t dev = 0; 412 int ldn = 0; 413 struct pnp_set_config_arg *csnldn; 414 char buf[100]; 415 char *desc = NULL; 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 (dev) { 440 /* 441 * This is an optional device 442 * identifier string. Skip it 443 * for now. 444 */ 445 continue; 446 } 447 /* else mandately card identifier string */ 448 if (large_len > sizeof(buf) - 1) 449 large_len = sizeof(buf) - 1; 450 bcopy(resinfo, buf, large_len); 451 452 /* 453 * Trim trailing spaces. 454 */ 455 while (buf[large_len-1] == ' ') 456 large_len--; 457 buf[large_len] = '\0'; 458 desc = buf; 459 continue; 460 } 461 462 continue; 463 } 464 465 /* Small resource */ 466 if (scanning < PNP_SRES_LEN(tag)) { 467 scanning = 0; 468 continue; 469 } 470 resinfo = resp; 471 resp += PNP_SRES_LEN(tag); 472 scanning -= PNP_SRES_LEN(tag); 473 474 switch (PNP_SRES_NUM(tag)) { 475 case PNP_TAG_LOGICAL_DEVICE: 476 /* 477 * Parse the resources for the previous 478 * logical device (if any). 479 */ 480 if (startres) { 481 pnp_parse_resources(dev, startres, 482 resinfo - startres - 1, ldn); 483 dev = 0; 484 startres = NULL; 485 } 486 487 /* 488 * A new logical device. Scan for end of 489 * resources. 490 */ 491 bcopy(resinfo, &logical_id, 4); 492 pnp_check_quirks(p->vendor_id, logical_id, ldn, NULL); 493 dev = BUS_ADD_CHILD(parent, ISA_ORDER_PNP, NULL, -1); 494 if (desc) 495 device_set_desc_copy(dev, desc); 496 else 497 device_set_desc_copy(dev, 498 pnp_eisaformat(logical_id)); 499 isa_set_vendorid(dev, p->vendor_id); 500 isa_set_serial(dev, p->serial); 501 isa_set_logicalid(dev, logical_id); 502 isa_set_configattr(dev, 503 ISACFGATTR_CANDISABLE | ISACFGATTR_DYNAMIC); 504 csnldn = malloc(sizeof *csnldn, M_DEVBUF, M_NOWAIT); 505 if (!csnldn) { 506 device_printf(parent, "out of memory\n"); 507 scanning = 0; 508 break; 509 } 510 csnldn->csn = csn; 511 csnldn->ldn = ldn; 512 ISA_SET_CONFIG_CALLBACK(parent, dev, pnp_set_config, 513 csnldn); 514 isa_set_pnp_csn(dev, csn); 515 isa_set_pnp_ldn(dev, ldn); 516 ldn++; 517 startres = resp; 518 break; 519 520 case PNP_TAG_END: 521 if (!startres) { 522 device_printf(parent, "malformed resources\n"); 523 scanning = 0; 524 break; 525 } 526 pnp_parse_resources(dev, startres, 527 resinfo - startres - 1, ldn); 528 dev = 0; 529 startres = NULL; 530 scanning = 0; 531 break; 532 533 default: 534 /* Skip this resource */ 535 break; 536 } 537 } 538 539 return (retval); 540 } 541 542 /* 543 * Read 'amount' bytes of resources from the card, allocating memory 544 * as needed. If a buffer is already available, it should be passed in 545 * '*resourcesp' and its length in '*spacep'. The number of resource 546 * bytes already in the buffer should be passed in '*lenp'. The memory 547 * allocated will be returned in '*resourcesp' with its size and the 548 * number of bytes of resources in '*spacep' and '*lenp' respectively. 549 * 550 * XXX: Multiple problems here, we forget to free() stuff in one 551 * XXX: error return, and in another case we free (*resourcesp) but 552 * XXX: don't tell the caller. 553 */ 554 static int 555 pnp_read_bytes(int amount, u_char **resourcesp, int *spacep, int *lenp) 556 { 557 u_char *resources = *resourcesp; 558 u_char *newres; 559 int space = *spacep; 560 int len = *lenp; 561 562 if (space == 0) { 563 space = 1024; 564 resources = malloc(space, M_TEMP, M_NOWAIT); 565 if (!resources) 566 return (ENOMEM); 567 } 568 569 if (len + amount > space) { 570 int extra = 1024; 571 while (len + amount > space + extra) 572 extra += 1024; 573 newres = malloc(space + extra, M_TEMP, M_NOWAIT); 574 if (!newres) { 575 /* XXX: free resources */ 576 return (ENOMEM); 577 } 578 bcopy(resources, newres, len); 579 free(resources, M_TEMP); 580 resources = newres; 581 space += extra; 582 } 583 584 if (pnp_get_resource_info(resources + len, amount) != amount) 585 return (EINVAL); 586 len += amount; 587 588 *resourcesp = resources; 589 *spacep = space; 590 *lenp = len; 591 592 return (0); 593 } 594 595 /* 596 * Read all resources from the card, allocating memory as needed. If a 597 * buffer is already available, it should be passed in '*resourcesp' 598 * and its length in '*spacep'. The memory allocated will be returned 599 * in '*resourcesp' with its size and the number of bytes of resources 600 * in '*spacep' and '*lenp' respectively. 601 */ 602 static int 603 pnp_read_resources(u_char **resourcesp, int *spacep, int *lenp) 604 { 605 u_char *resources = *resourcesp; 606 int space = *spacep; 607 int len = 0; 608 int error, done; 609 u_char tag; 610 611 error = 0; 612 done = 0; 613 while (!done) { 614 error = pnp_read_bytes(1, &resources, &space, &len); 615 if (error) 616 goto out; 617 tag = resources[len-1]; 618 if (PNP_RES_TYPE(tag) == 0) { 619 /* 620 * Small resource, read contents. 621 */ 622 error = pnp_read_bytes(PNP_SRES_LEN(tag), 623 &resources, &space, &len); 624 if (error) 625 goto out; 626 if (PNP_SRES_NUM(tag) == PNP_TAG_END) 627 done = 1; 628 } else { 629 /* 630 * Large resource, read length and contents. 631 */ 632 error = pnp_read_bytes(2, &resources, &space, &len); 633 if (error) 634 goto out; 635 error = pnp_read_bytes(resources[len-2] 636 + (resources[len-1] << 8), &resources, &space, 637 &len); 638 if (error) 639 goto out; 640 } 641 } 642 643 out: 644 *resourcesp = resources; 645 *spacep = space; 646 *lenp = len; 647 return (error); 648 } 649 650 /* 651 * Run the isolation protocol. Use pnp_rd_port as the READ_DATA port 652 * value (caller should try multiple READ_DATA locations before giving 653 * up). Upon exiting, all cards are aware that they should use 654 * pnp_rd_port as the READ_DATA port. 655 * 656 * In the first pass, a csn is assigned to each board and pnp_id's 657 * are saved to an array, pnp_devices. In the second pass, each 658 * card is woken up and the device configuration is called. 659 */ 660 static int 661 pnp_isolation_protocol(device_t parent) 662 { 663 int csn; 664 pnp_id id; 665 int found = 0, len; 666 u_char *resources = NULL; 667 int space = 0; 668 int error; 669 670 /* 671 * Put all cards into the Sleep state so that we can clear 672 * their CSNs. 673 */ 674 pnp_send_initiation_key(); 675 676 /* 677 * Clear the CSN for all cards. 678 */ 679 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_RESET_CSN); 680 681 /* 682 * Move all cards to the Isolation state. 683 */ 684 pnp_write(PNP_WAKE, 0); 685 686 /* 687 * Tell them where the read point is going to be this time. 688 */ 689 pnp_write(PNP_SET_RD_DATA, pnp_rd_port); 690 691 for (csn = 1; csn < PNP_MAX_CARDS; csn++) { 692 /* 693 * Start the serial isolation protocol. 694 */ 695 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); 696 DELAY(1000); /* Delay 1 msec */ 697 698 if (pnp_get_serial(&id)) { 699 /* 700 * We have read the id from a card 701 * successfully. The card which won the 702 * isolation protocol will be in Isolation 703 * mode and all others will be in Sleep. 704 * Program the CSN of the isolated card 705 * (taking it to Config state) and read its 706 * resources, creating devices as we find 707 * logical devices on the card. 708 */ 709 pnp_write(PNP_SET_CSN, csn); 710 if (bootverbose) 711 printf("Reading PnP configuration for %s.\n", 712 pnp_eisaformat(id.vendor_id)); 713 error = pnp_read_resources(&resources, &space, &len); 714 if (error) 715 break; 716 pnp_create_devices(parent, &id, csn, resources, len); 717 found++; 718 } else 719 break; 720 721 /* 722 * Put this card back to the Sleep state and 723 * simultaneously move all cards which don't have a 724 * CSN yet to Isolation state. 725 */ 726 pnp_write(PNP_WAKE, 0); 727 } 728 729 /* 730 * Unless we have chosen the wrong read port, all cards will 731 * be in Sleep state. Put them back into WaitForKey for 732 * now. Their resources will be programmed later. 733 */ 734 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); 735 736 /* 737 * Cleanup. 738 */ 739 if (resources) 740 free(resources, M_TEMP); 741 742 return (found); 743 } 744 745 746 /* 747 * pnp_identify() 748 * 749 * autoconfiguration of pnp devices. This routine just runs the 750 * isolation protocol over several ports, until one is successful. 751 * 752 * may be called more than once ? 753 * 754 */ 755 756 static void 757 pnp_identify(driver_t *driver, device_t parent) 758 { 759 int num_pnp_devs; 760 761 /* Try various READ_DATA ports from 0x203-0x3ff */ 762 for (pnp_rd_port = 0x80; (pnp_rd_port < 0xff); pnp_rd_port += 0x10) { 763 if (bootverbose) 764 printf("pnp_identify: Trying Read_Port at %x\n", 765 (pnp_rd_port << 2) | 0x3); 766 767 num_pnp_devs = pnp_isolation_protocol(parent); 768 if (num_pnp_devs) 769 break; 770 } 771 if (bootverbose) 772 printf("PNP Identify complete\n"); 773 } 774 775 static device_method_t pnp_methods[] = { 776 /* Device interface */ 777 DEVMETHOD(device_identify, pnp_identify), 778 779 { 0, 0 } 780 }; 781 782 static driver_t pnp_driver = { 783 "pnp", 784 pnp_methods, 785 1, /* no softc */ 786 }; 787 788 static devclass_t pnp_devclass; 789 790 DRIVER_MODULE(pnp, isa, pnp_driver, pnp_devclass, 0, 0); 791