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: src/sys/isa/pnp.c,v 1.5.2.1 2002/10/14 09:31:09 nyan Exp $ 27 * $DragonFly: src/sys/bus/isa/pnp.c,v 1.5 2004/04/07 05:54:32 dillon Exp $ 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/malloc.h> 37 #include "isavar.h" 38 #include "pnpreg.h" 39 #include "pnpvar.h" 40 #include <machine/clock.h> 41 42 typedef struct _pnp_id { 43 u_int32_t vendor_id; 44 u_int32_t serial; 45 u_char checksum; 46 } pnp_id; 47 48 struct pnp_set_config_arg { 49 int csn; /* Card number to configure */ 50 int ldn; /* Logical device on card */ 51 }; 52 53 struct pnp_quirk { 54 u_int32_t vendor_id; /* Vendor of the card */ 55 u_int32_t logical_id; /* ID of the device with quirk */ 56 int type; 57 int arg1; 58 int arg2; 59 }; 60 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 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 { 0x0100561e /* GRV0001 */, 0, 77 PNP_QUIRK_WRITE_REG, 0xf2, 0xff }, 78 /* 79 * An emu8000 does not give us other than the first 80 * port. 81 */ 82 { 0x26008c0e /* SB16 */, 0x21008c0e, 83 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 84 { 0x42008c0e /* SB32(CTL0042) */, 0x21008c0e, 85 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 86 { 0x44008c0e /* SB32(CTL0044) */, 0x21008c0e, 87 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 88 { 0x49008c0e /* SB32(CTL0049) */, 0x21008c0e, 89 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 90 { 0xf1008c0e /* SB32(CTL00f1) */, 0x21008c0e, 91 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 92 { 0xc1008c0e /* SB64(CTL00c1) */, 0x22008c0e, 93 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 94 { 0xc5008c0e /* SB64(CTL00c5) */, 0x22008c0e, 95 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 96 { 0xe4008c0e /* SB64(CTL00e4) */, 0x22008c0e, 97 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 98 99 { 0 } 100 }; 101 102 #ifdef PC98 103 /* Some NEC PnP cards have 9 bytes serial code. */ 104 static pnp_id necids[] = { 105 {0x4180a3b8, 0xffffffff, 0x00}, /* PC-9801CB-B04 (NEC8041) */ 106 {0x5181a3b8, 0xffffffff, 0x46}, /* PC-9821CB2-B04(NEC8151) */ 107 {0x5182a3b8, 0xffffffff, 0xb8}, /* PC-9801-XX (NEC8251) */ 108 {0x9181a3b8, 0xffffffff, 0x00}, /* PC-9801-120 (NEC8191) */ 109 {0, 0, 0} 110 }; 111 #endif 112 113 #if 0 114 /* 115 * these entries are initialized using the autoconfig menu 116 * The struct is invalid (and must be initialized) if the first 117 * CSN is zero. The init code fills invalid entries with CSN 255 118 * which is not a supported value. 119 */ 120 121 struct pnp_cinfo pnp_ldn_overrides[MAX_PNP_LDN] = { 122 { 0 } 123 }; 124 #endif 125 126 /* The READ_DATA port that we are using currently */ 127 static int pnp_rd_port; 128 129 static void pnp_send_initiation_key(void); 130 static int pnp_get_serial(pnp_id *p); 131 static int pnp_isolation_protocol(device_t parent); 132 133 char * 134 pnp_eisaformat(u_int32_t id) 135 { 136 u_int8_t *data = (u_int8_t *) &id; 137 static char idbuf[8]; 138 const char hextoascii[] = "0123456789abcdef"; 139 140 idbuf[0] = '@' + ((data[0] & 0x7c) >> 2); 141 idbuf[1] = '@' + (((data[0] & 0x3) << 3) + ((data[1] & 0xe0) >> 5)); 142 idbuf[2] = '@' + (data[1] & 0x1f); 143 idbuf[3] = hextoascii[(data[2] >> 4)]; 144 idbuf[4] = hextoascii[(data[2] & 0xf)]; 145 idbuf[5] = hextoascii[(data[3] >> 4)]; 146 idbuf[6] = hextoascii[(data[3] & 0xf)]; 147 idbuf[7] = 0; 148 return(idbuf); 149 } 150 151 static void 152 pnp_write(int d, u_char r) 153 { 154 outb (_PNP_ADDRESS, d); 155 outb (_PNP_WRITE_DATA, r); 156 } 157 158 #if 0 159 160 static u_char 161 pnp_read(int d) 162 { 163 outb (_PNP_ADDRESS, d); 164 return (inb(3 | (pnp_rd_port <<2))); 165 } 166 167 #endif 168 169 /* 170 * Send Initiation LFSR as described in "Plug and Play ISA Specification", 171 * Intel May 94. 172 */ 173 static void 174 pnp_send_initiation_key() 175 { 176 int cur, i; 177 178 /* Reset the LSFR */ 179 outb(_PNP_ADDRESS, 0); 180 outb(_PNP_ADDRESS, 0); /* yes, we do need it twice! */ 181 182 cur = 0x6a; 183 outb(_PNP_ADDRESS, cur); 184 185 for (i = 1; i < 32; i++) { 186 cur = (cur >> 1) | (((cur ^ (cur >> 1)) << 7) & 0xff); 187 outb(_PNP_ADDRESS, cur); 188 } 189 } 190 191 192 /* 193 * Get the device's serial number. Returns 1 if the serial is valid. 194 */ 195 static int 196 pnp_get_serial(pnp_id *p) 197 { 198 int i, bit, valid = 0, sum = 0x6a; 199 u_char *data = (u_char *)p; 200 201 bzero(data, sizeof(char) * 9); 202 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); 203 for (i = 0; i < 72; i++) { 204 bit = inb((pnp_rd_port << 2) | 0x3) == 0x55; 205 DELAY(250); /* Delay 250 usec */ 206 207 /* Can't Short Circuit the next evaluation, so 'and' is last */ 208 bit = (inb((pnp_rd_port << 2) | 0x3) == 0xaa) && bit; 209 DELAY(250); /* Delay 250 usec */ 210 211 valid = valid || bit; 212 213 if (i < 64) 214 sum = (sum >> 1) | 215 (((sum ^ (sum >> 1) ^ bit) << 7) & 0xff); 216 217 data[i / 8] = (data[i / 8] >> 1) | (bit ? 0x80 : 0); 218 } 219 220 valid = valid && (data[8] == sum); 221 222 return valid; 223 } 224 225 /* 226 * Fill's the buffer with resource info from the device. 227 * Returns the number of characters read. 228 */ 229 static int 230 pnp_get_resource_info(u_char *buffer, int len) 231 { 232 int i, j, count; 233 u_char temp; 234 235 count = 0; 236 for (i = 0; i < len; i++) { 237 outb(_PNP_ADDRESS, PNP_STATUS); 238 for (j = 0; j < 100; j++) { 239 if ((inb((pnp_rd_port << 2) | 0x3)) & 0x1) 240 break; 241 DELAY(1); 242 } 243 if (j == 100) { 244 printf("PnP device failed to report resource data\n"); 245 return count; 246 } 247 outb(_PNP_ADDRESS, PNP_RESOURCE_DATA); 248 temp = inb((pnp_rd_port << 2) | 0x3); 249 if (buffer != NULL) 250 buffer[i] = temp; 251 count++; 252 } 253 return count; 254 } 255 256 #if 0 257 /* 258 * write_pnp_parms initializes a logical device with the parms 259 * in d, and then activates the board if the last parameter is 1. 260 */ 261 262 static int 263 write_pnp_parms(struct pnp_cinfo *d, pnp_id *p, int ldn) 264 { 265 int i, empty = -1 ; 266 267 pnp_write (SET_LDN, ldn ); 268 i = pnp_read(SET_LDN) ; 269 if (i != ldn) { 270 printf("Warning: LDN %d does not exist\n", ldn); 271 } 272 for (i = 0; i < 8; i++) { 273 pnp_write(IO_CONFIG_BASE + i * 2, d->ic_port[i] >> 8 ); 274 pnp_write(IO_CONFIG_BASE + i * 2 + 1, d->ic_port[i] & 0xff ); 275 } 276 for (i = 0; i < 4; i++) { 277 pnp_write(MEM_CONFIG + i*8, (d->ic_mem[i].base >> 16) & 0xff ); 278 pnp_write(MEM_CONFIG + i*8+1, (d->ic_mem[i].base >> 8) & 0xff ); 279 pnp_write(MEM_CONFIG + i*8+2, d->ic_mem[i].control & 0xff ); 280 pnp_write(MEM_CONFIG + i*8+3, (d->ic_mem[i].range >> 16) & 0xff ); 281 pnp_write(MEM_CONFIG + i*8+4, (d->ic_mem[i].range >> 8) & 0xff ); 282 } 283 for (i = 0; i < 2; i++) { 284 pnp_write(IRQ_CONFIG + i*2 , d->irq[i] ); 285 pnp_write(IRQ_CONFIG + i*2 + 1, d->irq_type[i] ); 286 pnp_write(DRQ_CONFIG + i, d->drq[i] ); 287 } 288 /* 289 * store parameters read into the current kernel 290 * so manual editing next time is easier 291 */ 292 for (i = 0 ; i < MAX_PNP_LDN; i++) { 293 if (pnp_ldn_overrides[i].csn == d->csn && 294 pnp_ldn_overrides[i].ldn == ldn) { 295 d->flags = pnp_ldn_overrides[i].flags ; 296 pnp_ldn_overrides[i] = *d ; 297 break ; 298 } else if (pnp_ldn_overrides[i].csn < 1 || 299 pnp_ldn_overrides[i].csn == 255) 300 empty = i ; 301 } 302 if (i== MAX_PNP_LDN && empty != -1) 303 pnp_ldn_overrides[empty] = *d; 304 305 /* 306 * Here should really perform the range check, and 307 * return a failure if not successful. 308 */ 309 pnp_write (IO_RANGE_CHECK, 0); 310 DELAY(1000); /* XXX is it really necessary ? */ 311 pnp_write (ACTIVATE, d->enable ? 1 : 0); 312 DELAY(1000); /* XXX is it really necessary ? */ 313 return 1 ; 314 } 315 #endif 316 317 /* 318 * This function is called after the bus has assigned resource 319 * locations for a logical device. 320 */ 321 static void 322 pnp_set_config(void *arg, struct isa_config *config, int enable) 323 { 324 int csn = ((struct pnp_set_config_arg *) arg)->csn; 325 int ldn = ((struct pnp_set_config_arg *) arg)->ldn; 326 int i; 327 328 /* 329 * First put all cards into Sleep state with the initiation 330 * key, then put our card into Config state. 331 */ 332 pnp_send_initiation_key(); 333 pnp_write(PNP_WAKE, csn); 334 335 /* 336 * Select our logical device so that we can program it. 337 */ 338 pnp_write(PNP_SET_LDN, ldn); 339 340 /* 341 * Now program the resources. 342 */ 343 for (i = 0; i < config->ic_nmem; i++) { 344 u_int32_t start = config->ic_mem[i].ir_start; 345 u_int32_t size = config->ic_mem[i].ir_size; 346 if (start & 0xff) 347 panic("pnp_set_config: bogus memory assignment"); 348 pnp_write(PNP_MEM_BASE_HIGH(i), (start >> 16) & 0xff); 349 pnp_write(PNP_MEM_BASE_LOW(i), (start >> 8) & 0xff); 350 pnp_write(PNP_MEM_RANGE_HIGH(i), (size >> 16) & 0xff); 351 pnp_write(PNP_MEM_RANGE_LOW(i), (size >> 8) & 0xff); 352 } 353 for (; i < ISA_NMEM; i++) { 354 pnp_write(PNP_MEM_BASE_HIGH(i), 0); 355 pnp_write(PNP_MEM_BASE_LOW(i), 0); 356 pnp_write(PNP_MEM_RANGE_HIGH(i), 0); 357 pnp_write(PNP_MEM_RANGE_LOW(i), 0); 358 } 359 360 for (i = 0; i < config->ic_nport; i++) { 361 u_int32_t start = config->ic_port[i].ir_start; 362 pnp_write(PNP_IO_BASE_HIGH(i), (start >> 8) & 0xff); 363 pnp_write(PNP_IO_BASE_LOW(i), (start >> 0) & 0xff); 364 } 365 for (; i < ISA_NPORT; i++) { 366 pnp_write(PNP_IO_BASE_HIGH(i), 0); 367 pnp_write(PNP_IO_BASE_LOW(i), 0); 368 } 369 370 for (i = 0; i < config->ic_nirq; i++) { 371 int irq = ffs(config->ic_irqmask[i]) - 1; 372 pnp_write(PNP_IRQ_LEVEL(i), irq); 373 pnp_write(PNP_IRQ_TYPE(i), 2); /* XXX */ 374 } 375 for (; i < ISA_NIRQ; i++) { 376 /* 377 * IRQ 0 is not a valid interrupt selection and 378 * represents no interrupt selection. 379 */ 380 pnp_write(PNP_IRQ_LEVEL(i), 0); 381 } 382 383 for (i = 0; i < config->ic_ndrq; i++) { 384 int drq = ffs(config->ic_drqmask[i]) - 1; 385 pnp_write(PNP_DMA_CHANNEL(i), drq); 386 } 387 for (; i < ISA_NDRQ; i++) { 388 /* 389 * DMA channel 4, the cascade channel is used to 390 * indicate no DMA channel is active. 391 */ 392 pnp_write(PNP_DMA_CHANNEL(i), 4); 393 } 394 395 pnp_write(PNP_ACTIVATE, enable ? 1 : 0); 396 397 /* 398 * Wake everyone up again, we are finished. 399 */ 400 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); 401 } 402 403 /* 404 * Process quirks for a logical device.. The card must be in Config state. 405 */ 406 void 407 pnp_check_quirks(u_int32_t vendor_id, u_int32_t logical_id, 408 int ldn, struct isa_config *config) 409 { 410 struct pnp_quirk *qp; 411 412 for (qp = &pnp_quirks[0]; qp->vendor_id; qp++) { 413 if (qp->vendor_id == vendor_id 414 && (qp->logical_id == 0 415 || qp->logical_id == logical_id)) { 416 switch (qp->type) { 417 case PNP_QUIRK_WRITE_REG: 418 pnp_write(PNP_SET_LDN, ldn); 419 pnp_write(qp->arg1, qp->arg2); 420 break; 421 case PNP_QUIRK_EXTRA_IO: 422 if (config == NULL) 423 break; 424 if (qp->arg1 != 0) { 425 config->ic_nport++; 426 config->ic_port[config->ic_nport - 1] = config->ic_port[0]; 427 config->ic_port[config->ic_nport - 1].ir_start += qp->arg1; 428 config->ic_port[config->ic_nport - 1].ir_end += qp->arg1; 429 } 430 if (qp->arg2 != 0) { 431 config->ic_nport++; 432 config->ic_port[config->ic_nport - 1] = config->ic_port[0]; 433 config->ic_port[config->ic_nport - 1].ir_start += qp->arg2; 434 config->ic_port[config->ic_nport - 1].ir_end += qp->arg2; 435 } 436 break; 437 438 } 439 } 440 } 441 } 442 443 /* 444 * Scan Resource Data for Logical Devices. 445 * 446 * This function exits as soon as it gets an error reading *ANY* 447 * Resource Data or it reaches the end of Resource Data. In the first 448 * case the return value will be TRUE, FALSE otherwise. 449 */ 450 static int 451 pnp_create_devices(device_t parent, pnp_id *p, int csn, 452 u_char *resources, int len) 453 { 454 u_char tag, *resp, *resinfo, *startres = 0; 455 int large_len, scanning = len, retval = FALSE; 456 u_int32_t logical_id; 457 u_int32_t compat_id; 458 device_t dev = 0; 459 int ldn = 0; 460 struct pnp_set_config_arg *csnldn; 461 char buf[100]; 462 char *desc = 0; 463 464 resp = resources; 465 while (scanning > 0) { 466 tag = *resp++; 467 scanning--; 468 if (PNP_RES_TYPE(tag) != 0) { 469 /* Large resource */ 470 if (scanning < 2) { 471 scanning = 0; 472 continue; 473 } 474 large_len = resp[0] + (resp[1] << 8); 475 resp += 2; 476 477 if (scanning < large_len) { 478 scanning = 0; 479 continue; 480 } 481 resinfo = resp; 482 resp += large_len; 483 scanning -= large_len; 484 485 if (PNP_LRES_NUM(tag) == PNP_TAG_ID_ANSI) { 486 if (large_len > sizeof(buf) - 1) 487 large_len = sizeof(buf) - 1; 488 bcopy(resinfo, buf, large_len); 489 490 /* 491 * Trim trailing spaces. 492 */ 493 while (buf[large_len-1] == ' ') 494 large_len--; 495 buf[large_len] = '\0'; 496 desc = buf; 497 if (dev) 498 device_set_desc_copy(dev, desc); 499 continue; 500 } 501 502 continue; 503 } 504 505 /* Small resource */ 506 if (scanning < PNP_SRES_LEN(tag)) { 507 scanning = 0; 508 continue; 509 } 510 resinfo = resp; 511 resp += PNP_SRES_LEN(tag); 512 scanning -= PNP_SRES_LEN(tag);; 513 514 switch (PNP_SRES_NUM(tag)) { 515 case PNP_TAG_LOGICAL_DEVICE: 516 /* 517 * Parse the resources for the previous 518 * logical device (if any). 519 */ 520 if (startres) { 521 pnp_parse_resources(dev, startres, 522 resinfo - startres - 1, ldn); 523 dev = 0; 524 startres = 0; 525 } 526 527 /* 528 * A new logical device. Scan for end of 529 * resources. 530 */ 531 bcopy(resinfo, &logical_id, 4); 532 pnp_check_quirks(p->vendor_id, logical_id, ldn, NULL); 533 compat_id = 0; 534 dev = BUS_ADD_CHILD(parent, ISA_ORDER_PNP, NULL, -1); 535 if (desc) 536 device_set_desc_copy(dev, desc); 537 isa_set_vendorid(dev, p->vendor_id); 538 isa_set_serial(dev, p->serial); 539 isa_set_logicalid(dev, logical_id); 540 csnldn = malloc(sizeof *csnldn, M_DEVBUF, M_WAITOK); 541 csnldn->csn = csn; 542 csnldn->ldn = ldn; 543 ISA_SET_CONFIG_CALLBACK(parent, dev, 544 pnp_set_config, csnldn); 545 ldn++; 546 startres = resp; 547 break; 548 549 case PNP_TAG_END: 550 if (!startres) { 551 device_printf(parent, 552 "malformed resources\n"); 553 scanning = 0; 554 break; 555 } 556 pnp_parse_resources(dev, startres, 557 resinfo - startres - 1, ldn); 558 dev = 0; 559 startres = 0; 560 scanning = 0; 561 break; 562 563 default: 564 /* Skip this resource */ 565 break; 566 } 567 } 568 569 return retval; 570 } 571 572 /* 573 * Read 'amount' bytes of resources from the card, allocating memory 574 * as needed. If a buffer is already available, it should be passed in 575 * '*resourcesp' and its length in '*spacep'. The number of resource 576 * bytes already in the buffer should be passed in '*lenp'. The memory 577 * allocated will be returned in '*resourcesp' with its size and the 578 * number of bytes of resources in '*spacep' and '*lenp' respectively. 579 */ 580 static int 581 pnp_read_bytes(int amount, u_char **resourcesp, int *spacep, int *lenp) 582 { 583 u_char *resources = *resourcesp; 584 u_char *newres; 585 int space = *spacep; 586 int len = *lenp; 587 588 if (space == 0) { 589 space = 1024; 590 resources = malloc(space, M_TEMP, M_WAITOK); 591 } 592 593 if (len + amount > space) { 594 int extra = 1024; 595 while (len + amount > space + extra) 596 extra += 1024; 597 newres = malloc(space + extra, M_TEMP, M_WAITOK); 598 bcopy(resources, newres, len); 599 free(resources, M_TEMP); 600 resources = newres; 601 space += extra; 602 } 603 604 if (pnp_get_resource_info(resources + len, amount) != amount) 605 return EINVAL; 606 len += amount; 607 608 *resourcesp = resources; 609 *spacep = space; 610 *lenp = len; 611 612 return 0; 613 } 614 615 /* 616 * Read all resources from the card, allocating memory as needed. If a 617 * buffer is already available, it should be passed in '*resourcesp' 618 * and its length in '*spacep'. The memory allocated will be returned 619 * in '*resourcesp' with its size and the number of bytes of resources 620 * in '*spacep' and '*lenp' respectively. 621 */ 622 static int 623 pnp_read_resources(u_char **resourcesp, int *spacep, int *lenp) 624 { 625 u_char *resources = *resourcesp; 626 int space = *spacep; 627 int len = 0; 628 int error, done; 629 u_char tag; 630 631 error = 0; 632 done = 0; 633 while (!done) { 634 error = pnp_read_bytes(1, &resources, &space, &len); 635 if (error) 636 goto out; 637 tag = resources[len-1]; 638 if (PNP_RES_TYPE(tag) == 0) { 639 /* 640 * Small resource, read contents. 641 */ 642 error = pnp_read_bytes(PNP_SRES_LEN(tag), 643 &resources, &space, &len); 644 if (error) 645 goto out; 646 if (PNP_SRES_NUM(tag) == PNP_TAG_END) 647 done = 1; 648 } else { 649 /* 650 * Large resource, read length and contents. 651 */ 652 error = pnp_read_bytes(2, &resources, &space, &len); 653 if (error) 654 goto out; 655 error = pnp_read_bytes(resources[len-2] 656 + (resources[len-1] << 8), 657 &resources, &space, &len); 658 if (error) 659 goto out; 660 } 661 } 662 663 out: 664 *resourcesp = resources; 665 *spacep = space; 666 *lenp = len; 667 return error; 668 } 669 670 /* 671 * Run the isolation protocol. Use pnp_rd_port as the READ_DATA port 672 * value (caller should try multiple READ_DATA locations before giving 673 * up). Upon exiting, all cards are aware that they should use 674 * pnp_rd_port as the READ_DATA port. 675 * 676 * In the first pass, a csn is assigned to each board and pnp_id's 677 * are saved to an array, pnp_devices. In the second pass, each 678 * card is woken up and the device configuration is called. 679 */ 680 static int 681 pnp_isolation_protocol(device_t parent) 682 { 683 int csn; 684 pnp_id id; 685 int found = 0, len; 686 u_char *resources = 0; 687 int space = 0; 688 int error; 689 #ifdef PC98 690 int n, necpnp; 691 u_char buffer[10]; 692 #endif 693 694 /* 695 * Put all cards into the Sleep state so that we can clear 696 * their CSNs. 697 */ 698 pnp_send_initiation_key(); 699 700 /* 701 * Clear the CSN for all cards. 702 */ 703 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_RESET_CSN); 704 705 /* 706 * Move all cards to the Isolation state. 707 */ 708 pnp_write(PNP_WAKE, 0); 709 710 /* 711 * Tell them where the read point is going to be this time. 712 */ 713 pnp_write(PNP_SET_RD_DATA, pnp_rd_port); 714 715 for (csn = 1; csn < PNP_MAX_CARDS; csn++) { 716 /* 717 * Start the serial isolation protocol. 718 */ 719 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); 720 DELAY(1000); /* Delay 1 msec */ 721 722 if (pnp_get_serial(&id)) { 723 /* 724 * We have read the id from a card 725 * successfully. The card which won the 726 * isolation protocol will be in Isolation 727 * mode and all others will be in Sleep. 728 * Program the CSN of the isolated card 729 * (taking it to Config state) and read its 730 * resources, creating devices as we find 731 * logical devices on the card. 732 */ 733 pnp_write(PNP_SET_CSN, csn); 734 #ifdef PC98 735 if (bootverbose) 736 printf("PnP Vendor ID = %x\n", id.vendor_id); 737 /* Check for NEC PnP (9 bytes serial). */ 738 for (n = necpnp = 0; necids[n].vendor_id; n++) { 739 if (id.vendor_id == necids[n].vendor_id) { 740 necpnp = 1; 741 break; 742 } 743 } 744 if (necpnp) { 745 if (bootverbose) 746 printf("It seems to NEC-PnP card (%s).\n", 747 pnp_eisaformat(id.vendor_id)); 748 /* Read dummy 9 bytes serial area. */ 749 pnp_get_resource_info(buffer, 9); 750 } else { 751 if (bootverbose) 752 printf("It seems to Normal-ISA-PnP card (%s).\n", 753 pnp_eisaformat(id.vendor_id)); 754 } 755 if (bootverbose) 756 printf("Reading PnP configuration for %s.\n", 757 pnp_eisaformat(id.vendor_id)); 758 #endif 759 error = pnp_read_resources(&resources, 760 &space, 761 &len); 762 if (error) 763 break; 764 pnp_create_devices(parent, &id, csn, 765 resources, len); 766 found++; 767 } else 768 break; 769 770 /* 771 * Put this card back to the Sleep state and 772 * simultaneously move all cards which don't have a 773 * CSN yet to Isolation state. 774 */ 775 pnp_write(PNP_WAKE, 0); 776 } 777 778 /* 779 * Unless we have chosen the wrong read port, all cards will 780 * be in Sleep state. Put them back into WaitForKey for 781 * now. Their resources will be programmed later. 782 */ 783 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); 784 785 /* 786 * Cleanup. 787 */ 788 if (resources) 789 free(resources, M_TEMP); 790 791 return found; 792 } 793 794 795 /* 796 * pnp_identify() 797 * 798 * autoconfiguration of pnp devices. This routine just runs the 799 * isolation protocol over several ports, until one is successful. 800 * 801 * may be called more than once ? 802 * 803 */ 804 805 static void 806 pnp_identify(driver_t *driver, device_t parent) 807 { 808 int num_pnp_devs; 809 810 #if 0 811 if (pnp_ldn_overrides[0].csn == 0) { 812 if (bootverbose) 813 printf("Initializing PnP override table\n"); 814 bzero (pnp_ldn_overrides, sizeof(pnp_ldn_overrides)); 815 pnp_ldn_overrides[0].csn = 255 ; 816 } 817 #endif 818 819 /* Try various READ_DATA ports from 0x203-0x3ff */ 820 for (pnp_rd_port = 0x80; (pnp_rd_port < 0xff); pnp_rd_port += 0x10) { 821 if (bootverbose) 822 printf("Trying Read_Port at %x\n", (pnp_rd_port << 2) | 0x3); 823 824 num_pnp_devs = pnp_isolation_protocol(parent); 825 if (num_pnp_devs) 826 break; 827 } 828 } 829 830 static device_method_t pnp_methods[] = { 831 /* Device interface */ 832 DEVMETHOD(device_identify, pnp_identify), 833 834 { 0, 0 } 835 }; 836 837 static driver_t pnp_driver = { 838 "pnp", 839 pnp_methods, 840 1, /* no softc */ 841 }; 842 843 static devclass_t pnp_devclass; 844 845 DRIVER_MODULE(pnp, isa, pnp_driver, pnp_devclass, 0, 0); 846