pnp.c revision 150687
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: head/sys/isa/pnp.c 150687 2005-09-28 15:01:58Z marius $"); 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 44typedef struct _pnp_id { 45 uint32_t vendor_id; 46 uint32_t serial; 47 u_char checksum; 48} pnp_id; 49 50struct pnp_set_config_arg { 51 int csn; /* Card number to configure */ 52 int ldn; /* Logical device on card */ 53}; 54 55struct 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 65struct 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#ifdef PC98 98/* Some NEC PnP cards have 9 bytes serial code. */ 99static pnp_id necids[] = { 100 {0x4180a3b8, 0xffffffff, 0x00}, /* PC-9801CB-B04 (NEC8041) */ 101 {0x5181a3b8, 0xffffffff, 0x46}, /* PC-9821CB2-B04(NEC8151) */ 102 {0x5182a3b8, 0xffffffff, 0xb8}, /* PC-9801-XX (NEC8251) */ 103 {0x9181a3b8, 0xffffffff, 0x00}, /* PC-9801-120 (NEC8191) */ 104 {0, 0, 0} 105}; 106#endif 107 108/* The READ_DATA port that we are using currently */ 109static int pnp_rd_port; 110 111static void pnp_send_initiation_key(void); 112static int pnp_get_serial(pnp_id *p); 113static int pnp_isolation_protocol(device_t parent); 114 115char * 116pnp_eisaformat(uint32_t id) 117{ 118 uint8_t *data; 119 static char idbuf[8]; 120 const char hextoascii[] = "0123456789abcdef"; 121 122 id = htole32(id); 123 data = (uint8_t *)&id; 124 idbuf[0] = '@' + ((data[0] & 0x7c) >> 2); 125 idbuf[1] = '@' + (((data[0] & 0x3) << 3) + ((data[1] & 0xe0) >> 5)); 126 idbuf[2] = '@' + (data[1] & 0x1f); 127 idbuf[3] = hextoascii[(data[2] >> 4)]; 128 idbuf[4] = hextoascii[(data[2] & 0xf)]; 129 idbuf[5] = hextoascii[(data[3] >> 4)]; 130 idbuf[6] = hextoascii[(data[3] & 0xf)]; 131 idbuf[7] = 0; 132 return(idbuf); 133} 134 135static void 136pnp_write(int d, u_char r) 137{ 138 outb (_PNP_ADDRESS, d); 139 outb (_PNP_WRITE_DATA, r); 140} 141 142/* 143 * Send Initiation LFSR as described in "Plug and Play ISA Specification", 144 * Intel May 94. 145 */ 146static void 147pnp_send_initiation_key() 148{ 149 int cur, i; 150 151 /* Reset the LSFR */ 152 outb(_PNP_ADDRESS, 0); 153 outb(_PNP_ADDRESS, 0); /* yes, we do need it twice! */ 154 155 cur = 0x6a; 156 outb(_PNP_ADDRESS, cur); 157 158 for (i = 1; i < 32; i++) { 159 cur = (cur >> 1) | (((cur ^ (cur >> 1)) << 7) & 0xff); 160 outb(_PNP_ADDRESS, cur); 161 } 162} 163 164 165/* 166 * Get the device's serial number. Returns 1 if the serial is valid. 167 */ 168static int 169pnp_get_serial(pnp_id *p) 170{ 171 int i, bit, valid = 0, sum = 0x6a; 172 u_char *data = (u_char *)p; 173 174 bzero(data, sizeof(char) * 9); 175 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); 176 for (i = 0; i < 72; i++) { 177 bit = inb((pnp_rd_port << 2) | 0x3) == 0x55; 178 DELAY(250); /* Delay 250 usec */ 179 180 /* Can't Short Circuit the next evaluation, so 'and' is last */ 181 bit = (inb((pnp_rd_port << 2) | 0x3) == 0xaa) && bit; 182 DELAY(250); /* Delay 250 usec */ 183 184 valid = valid || bit; 185 if (i < 64) 186 sum = (sum >> 1) | 187 (((sum ^ (sum >> 1) ^ bit) << 7) & 0xff); 188 data[i / 8] = (data[i / 8] >> 1) | (bit ? 0x80 : 0); 189 } 190 191 valid = valid && (data[8] == sum); 192 193 return (valid); 194} 195 196/* 197 * Fill's the buffer with resource info from the device. 198 * Returns the number of characters read. 199 */ 200static int 201pnp_get_resource_info(u_char *buffer, int len) 202{ 203 int i, j, count; 204 u_char temp; 205 206 count = 0; 207 for (i = 0; i < len; i++) { 208 outb(_PNP_ADDRESS, PNP_STATUS); 209 for (j = 0; j < 100; j++) { 210 if ((inb((pnp_rd_port << 2) | 0x3)) & 0x1) 211 break; 212 DELAY(1); 213 } 214 if (j == 100) { 215 printf("PnP device failed to report resource data\n"); 216 return (count); 217 } 218 outb(_PNP_ADDRESS, PNP_RESOURCE_DATA); 219 temp = inb((pnp_rd_port << 2) | 0x3); 220 if (buffer != NULL) 221 buffer[i] = temp; 222 count++; 223 } 224 return (count); 225} 226 227/* 228 * This function is called after the bus has assigned resource 229 * locations for a logical device. 230 */ 231static void 232pnp_set_config(void *arg, struct isa_config *config, int enable) 233{ 234 int csn = ((struct pnp_set_config_arg *) arg)->csn; 235 int ldn = ((struct pnp_set_config_arg *) arg)->ldn; 236 int i; 237 238 /* 239 * First put all cards into Sleep state with the initiation 240 * key, then put our card into Config state. 241 */ 242 pnp_send_initiation_key(); 243 pnp_write(PNP_WAKE, csn); 244 245 /* 246 * Select our logical device so that we can program it. 247 */ 248 pnp_write(PNP_SET_LDN, ldn); 249 250 /* 251 * Constrain the number of resources we will try to program 252 */ 253 if (config->ic_nmem > ISA_PNP_NMEM) { 254 printf("too many ISA memory ranges (%d > %d)\n", 255 config->ic_nmem, ISA_PNP_NMEM); 256 config->ic_nmem = ISA_PNP_NMEM; 257 } 258 if (config->ic_nport > ISA_PNP_NPORT) { 259 printf("too many ISA I/O ranges (%d > %d)\n", config->ic_nport, 260 ISA_PNP_NPORT); 261 config->ic_nport = ISA_PNP_NPORT; 262 } 263 if (config->ic_nirq > ISA_PNP_NIRQ) { 264 printf("too many ISA IRQs (%d > %d)\n", config->ic_nirq, 265 ISA_PNP_NIRQ); 266 config->ic_nirq = ISA_PNP_NIRQ; 267 } 268 if (config->ic_ndrq > ISA_PNP_NDRQ) { 269 printf("too many ISA DRQs (%d > %d)\n", config->ic_ndrq, 270 ISA_PNP_NDRQ); 271 config->ic_ndrq = ISA_PNP_NDRQ; 272 } 273 274 /* 275 * Now program the resources. 276 */ 277 for (i = 0; i < config->ic_nmem; i++) { 278 uint32_t start; 279 uint32_t size; 280 281 /* XXX: should handle memory control register, 32 bit memory */ 282 if (config->ic_mem[i].ir_size == 0) { 283 pnp_write(PNP_MEM_BASE_HIGH(i), 0); 284 pnp_write(PNP_MEM_BASE_LOW(i), 0); 285 pnp_write(PNP_MEM_RANGE_HIGH(i), 0); 286 pnp_write(PNP_MEM_RANGE_LOW(i), 0); 287 } else { 288 start = config->ic_mem[i].ir_start; 289 size = config->ic_mem[i].ir_size; 290 if (start & 0xff) 291 panic("pnp_set_config: bogus memory assignment"); 292 pnp_write(PNP_MEM_BASE_HIGH(i), (start >> 16) & 0xff); 293 pnp_write(PNP_MEM_BASE_LOW(i), (start >> 8) & 0xff); 294 pnp_write(PNP_MEM_RANGE_HIGH(i), (size >> 16) & 0xff); 295 pnp_write(PNP_MEM_RANGE_LOW(i), (size >> 8) & 0xff); 296 } 297 } 298 for (; i < ISA_PNP_NMEM; i++) { 299 pnp_write(PNP_MEM_BASE_HIGH(i), 0); 300 pnp_write(PNP_MEM_BASE_LOW(i), 0); 301 pnp_write(PNP_MEM_RANGE_HIGH(i), 0); 302 pnp_write(PNP_MEM_RANGE_LOW(i), 0); 303 } 304 305 for (i = 0; i < config->ic_nport; i++) { 306 uint32_t start; 307 308 if (config->ic_port[i].ir_size == 0) { 309 pnp_write(PNP_IO_BASE_HIGH(i), 0); 310 pnp_write(PNP_IO_BASE_LOW(i), 0); 311 } else { 312 start = config->ic_port[i].ir_start; 313 pnp_write(PNP_IO_BASE_HIGH(i), (start >> 8) & 0xff); 314 pnp_write(PNP_IO_BASE_LOW(i), (start >> 0) & 0xff); 315 } 316 } 317 for (; i < ISA_PNP_NPORT; i++) { 318 pnp_write(PNP_IO_BASE_HIGH(i), 0); 319 pnp_write(PNP_IO_BASE_LOW(i), 0); 320 } 321 322 for (i = 0; i < config->ic_nirq; i++) { 323 int irq; 324 325 /* XXX: interrupt type */ 326 if (config->ic_irqmask[i] == 0) { 327 pnp_write(PNP_IRQ_LEVEL(i), 0); 328 pnp_write(PNP_IRQ_TYPE(i), 2); 329 } else { 330 irq = ffs(config->ic_irqmask[i]) - 1; 331 pnp_write(PNP_IRQ_LEVEL(i), irq); 332 pnp_write(PNP_IRQ_TYPE(i), 2); /* XXX */ 333 } 334 } 335 for (; i < ISA_PNP_NIRQ; i++) { 336 /* 337 * IRQ 0 is not a valid interrupt selection and 338 * represents no interrupt selection. 339 */ 340 pnp_write(PNP_IRQ_LEVEL(i), 0); 341 pnp_write(PNP_IRQ_TYPE(i), 2); 342 } 343 344 for (i = 0; i < config->ic_ndrq; i++) { 345 int drq; 346 347 if (config->ic_drqmask[i] == 0) { 348 pnp_write(PNP_DMA_CHANNEL(i), 4); 349 } else { 350 drq = ffs(config->ic_drqmask[i]) - 1; 351 pnp_write(PNP_DMA_CHANNEL(i), drq); 352 } 353 } 354 for (; i < ISA_PNP_NDRQ; i++) { 355 /* 356 * DMA channel 4, the cascade channel is used to 357 * indicate no DMA channel is active. 358 */ 359 pnp_write(PNP_DMA_CHANNEL(i), 4); 360 } 361 362 pnp_write(PNP_ACTIVATE, enable ? 1 : 0); 363 364 /* 365 * Wake everyone up again, we are finished. 366 */ 367 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); 368} 369 370/* 371 * Process quirks for a logical device.. The card must be in Config state. 372 */ 373void 374pnp_check_quirks(uint32_t vendor_id, uint32_t logical_id, int ldn, 375 struct isa_config *config) 376{ 377 struct pnp_quirk *qp; 378 379 for (qp = &pnp_quirks[0]; qp->vendor_id; qp++) { 380 if (qp->vendor_id == vendor_id 381 && (qp->logical_id == 0 || qp->logical_id == logical_id)) { 382 switch (qp->type) { 383 case PNP_QUIRK_WRITE_REG: 384 pnp_write(PNP_SET_LDN, ldn); 385 pnp_write(qp->arg1, qp->arg2); 386 break; 387 case PNP_QUIRK_EXTRA_IO: 388 if (config == NULL) 389 break; 390 if (qp->arg1 != 0) { 391 config->ic_nport++; 392 config->ic_port[config->ic_nport - 1] = config->ic_port[0]; 393 config->ic_port[config->ic_nport - 1].ir_start += qp->arg1; 394 config->ic_port[config->ic_nport - 1].ir_end += qp->arg1; 395 } 396 if (qp->arg2 != 0) { 397 config->ic_nport++; 398 config->ic_port[config->ic_nport - 1] = config->ic_port[0]; 399 config->ic_port[config->ic_nport - 1].ir_start += qp->arg2; 400 config->ic_port[config->ic_nport - 1].ir_end += qp->arg2; 401 } 402 break; 403 } 404 } 405 } 406} 407 408/* 409 * Scan Resource Data for Logical Devices. 410 * 411 * This function exits as soon as it gets an error reading *ANY* 412 * Resource Data or it reaches the end of Resource Data. In the first 413 * case the return value will be TRUE, FALSE otherwise. 414 */ 415static int 416pnp_create_devices(device_t parent, pnp_id *p, int csn, 417 u_char *resources, int len) 418{ 419 u_char tag, *resp, *resinfo, *startres = 0; 420 int large_len, scanning = len, retval = FALSE; 421 uint32_t logical_id; 422 device_t dev = 0; 423 int ldn = 0; 424 struct pnp_set_config_arg *csnldn; 425 char buf[100]; 426 char *desc = 0; 427 428 resp = resources; 429 while (scanning > 0) { 430 tag = *resp++; 431 scanning--; 432 if (PNP_RES_TYPE(tag) != 0) { 433 /* Large resource */ 434 if (scanning < 2) { 435 scanning = 0; 436 continue; 437 } 438 large_len = resp[0] + (resp[1] << 8); 439 resp += 2; 440 441 if (scanning < large_len) { 442 scanning = 0; 443 continue; 444 } 445 resinfo = resp; 446 resp += large_len; 447 scanning -= large_len; 448 449 if (PNP_LRES_NUM(tag) == PNP_TAG_ID_ANSI) { 450 if (dev) { 451 /* 452 * This is an optional device 453 * indentifier string. Skipt it 454 * for now. 455 */ 456 continue; 457 } 458 /* else mandately card identifier string */ 459 if (large_len > sizeof(buf) - 1) 460 large_len = sizeof(buf) - 1; 461 bcopy(resinfo, buf, large_len); 462 463 /* 464 * Trim trailing spaces. 465 */ 466 while (buf[large_len-1] == ' ') 467 large_len--; 468 buf[large_len] = '\0'; 469 desc = buf; 470 continue; 471 } 472 473 continue; 474 } 475 476 /* Small resource */ 477 if (scanning < PNP_SRES_LEN(tag)) { 478 scanning = 0; 479 continue; 480 } 481 resinfo = resp; 482 resp += PNP_SRES_LEN(tag); 483 scanning -= PNP_SRES_LEN(tag);; 484 485 switch (PNP_SRES_NUM(tag)) { 486 case PNP_TAG_LOGICAL_DEVICE: 487 /* 488 * Parse the resources for the previous 489 * logical device (if any). 490 */ 491 if (startres) { 492 pnp_parse_resources(dev, startres, 493 resinfo - startres - 1, ldn); 494 dev = 0; 495 startres = 0; 496 } 497 498 /* 499 * A new logical device. Scan for end of 500 * resources. 501 */ 502 bcopy(resinfo, &logical_id, 4); 503 pnp_check_quirks(p->vendor_id, logical_id, ldn, NULL); 504 dev = BUS_ADD_CHILD(parent, ISA_ORDER_PNP, NULL, -1); 505 if (desc) 506 device_set_desc_copy(dev, desc); 507 else 508 device_set_desc_copy(dev, 509 pnp_eisaformat(logical_id)); 510 isa_set_vendorid(dev, p->vendor_id); 511 isa_set_serial(dev, p->serial); 512 isa_set_logicalid(dev, logical_id); 513 isa_set_configattr(dev, 514 ISACFGATTR_CANDISABLE | ISACFGATTR_DYNAMIC); 515 csnldn = malloc(sizeof *csnldn, M_DEVBUF, M_NOWAIT); 516 if (!csnldn) { 517 device_printf(parent, "out of memory\n"); 518 scanning = 0; 519 break; 520 } 521 csnldn->csn = csn; 522 csnldn->ldn = ldn; 523 ISA_SET_CONFIG_CALLBACK(parent, dev, pnp_set_config, 524 csnldn); 525 ldn++; 526 startres = resp; 527 break; 528 529 case PNP_TAG_END: 530 if (!startres) { 531 device_printf(parent, "malformed resources\n"); 532 scanning = 0; 533 break; 534 } 535 pnp_parse_resources(dev, startres, 536 resinfo - startres - 1, ldn); 537 dev = 0; 538 startres = 0; 539 scanning = 0; 540 break; 541 542 default: 543 /* Skip this resource */ 544 break; 545 } 546 } 547 548 return (retval); 549} 550 551/* 552 * Read 'amount' bytes of resources from the card, allocating memory 553 * as needed. If a buffer is already available, it should be passed in 554 * '*resourcesp' and its length in '*spacep'. The number of resource 555 * bytes already in the buffer should be passed in '*lenp'. The memory 556 * allocated will be returned in '*resourcesp' with its size and the 557 * number of bytes of resources in '*spacep' and '*lenp' respectively. 558 * 559 * XXX: Multiple problems here, we forget to free() stuff in one 560 * XXX: error return, and in another case we free (*resourcesp) but 561 * XXX: don't tell the caller. 562 */ 563static int 564pnp_read_bytes(int amount, u_char **resourcesp, int *spacep, int *lenp) 565{ 566 u_char *resources = *resourcesp; 567 u_char *newres; 568 int space = *spacep; 569 int len = *lenp; 570 571 if (space == 0) { 572 space = 1024; 573 resources = malloc(space, M_TEMP, M_NOWAIT); 574 if (!resources) 575 return (ENOMEM); 576 } 577 578 if (len + amount > space) { 579 int extra = 1024; 580 while (len + amount > space + extra) 581 extra += 1024; 582 newres = malloc(space + extra, M_TEMP, M_NOWAIT); 583 if (!newres) { 584 /* XXX: free resources */ 585 return (ENOMEM); 586 } 587 bcopy(resources, newres, len); 588 free(resources, M_TEMP); 589 resources = newres; 590 space += extra; 591 } 592 593 if (pnp_get_resource_info(resources + len, amount) != amount) 594 return (EINVAL); 595 len += amount; 596 597 *resourcesp = resources; 598 *spacep = space; 599 *lenp = len; 600 601 return (0); 602} 603 604/* 605 * Read all resources from the card, allocating memory as needed. If a 606 * buffer is already available, it should be passed in '*resourcesp' 607 * and its length in '*spacep'. The memory allocated will be returned 608 * in '*resourcesp' with its size and the number of bytes of resources 609 * in '*spacep' and '*lenp' respectively. 610 */ 611static int 612pnp_read_resources(u_char **resourcesp, int *spacep, int *lenp) 613{ 614 u_char *resources = *resourcesp; 615 int space = *spacep; 616 int len = 0; 617 int error, done; 618 u_char tag; 619 620 error = 0; 621 done = 0; 622 while (!done) { 623 error = pnp_read_bytes(1, &resources, &space, &len); 624 if (error) 625 goto out; 626 tag = resources[len-1]; 627 if (PNP_RES_TYPE(tag) == 0) { 628 /* 629 * Small resource, read contents. 630 */ 631 error = pnp_read_bytes(PNP_SRES_LEN(tag), 632 &resources, &space, &len); 633 if (error) 634 goto out; 635 if (PNP_SRES_NUM(tag) == PNP_TAG_END) 636 done = 1; 637 } else { 638 /* 639 * Large resource, read length and contents. 640 */ 641 error = pnp_read_bytes(2, &resources, &space, &len); 642 if (error) 643 goto out; 644 error = pnp_read_bytes(resources[len-2] 645 + (resources[len-1] << 8), &resources, &space, 646 &len); 647 if (error) 648 goto out; 649 } 650 } 651 652 out: 653 *resourcesp = resources; 654 *spacep = space; 655 *lenp = len; 656 return (error); 657} 658 659/* 660 * Run the isolation protocol. Use pnp_rd_port as the READ_DATA port 661 * value (caller should try multiple READ_DATA locations before giving 662 * up). Upon exiting, all cards are aware that they should use 663 * pnp_rd_port as the READ_DATA port. 664 * 665 * In the first pass, a csn is assigned to each board and pnp_id's 666 * are saved to an array, pnp_devices. In the second pass, each 667 * card is woken up and the device configuration is called. 668 */ 669static int 670pnp_isolation_protocol(device_t parent) 671{ 672 int csn; 673 pnp_id id; 674 int found = 0, len; 675 u_char *resources = 0; 676 int space = 0; 677 int error; 678#ifdef PC98 679 int n, necpnp; 680 u_char buffer[10]; 681#endif 682 683 /* 684 * Put all cards into the Sleep state so that we can clear 685 * their CSNs. 686 */ 687 pnp_send_initiation_key(); 688 689 /* 690 * Clear the CSN for all cards. 691 */ 692 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_RESET_CSN); 693 694 /* 695 * Move all cards to the Isolation state. 696 */ 697 pnp_write(PNP_WAKE, 0); 698 699 /* 700 * Tell them where the read point is going to be this time. 701 */ 702 pnp_write(PNP_SET_RD_DATA, pnp_rd_port); 703 704 for (csn = 1; csn < PNP_MAX_CARDS; csn++) { 705 /* 706 * Start the serial isolation protocol. 707 */ 708 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); 709 DELAY(1000); /* Delay 1 msec */ 710 711 if (pnp_get_serial(&id)) { 712 /* 713 * We have read the id from a card 714 * successfully. The card which won the 715 * isolation protocol will be in Isolation 716 * mode and all others will be in Sleep. 717 * Program the CSN of the isolated card 718 * (taking it to Config state) and read its 719 * resources, creating devices as we find 720 * logical devices on the card. 721 */ 722 pnp_write(PNP_SET_CSN, csn); 723#ifdef PC98 724 if (bootverbose) 725 printf("PnP Vendor ID = %x\n", id.vendor_id); 726 /* Check for NEC PnP (9 bytes serial). */ 727 for (n = necpnp = 0; necids[n].vendor_id; n++) { 728 if (id.vendor_id == necids[n].vendor_id) { 729 necpnp = 1; 730 break; 731 } 732 } 733 if (necpnp) { 734 if (bootverbose) 735 printf("An NEC-PnP card (%s).\n", 736 pnp_eisaformat(id.vendor_id)); 737 /* Read dummy 9 bytes serial area. */ 738 pnp_get_resource_info(buffer, 9); 739 } else { 740 if (bootverbose) 741 printf("A Normal-ISA-PnP card (%s).\n", 742 pnp_eisaformat(id.vendor_id)); 743 } 744 if (bootverbose) 745 printf("Reading PnP configuration for %s.\n", 746 pnp_eisaformat(id.vendor_id)); 747#endif 748 error = pnp_read_resources(&resources, &space, &len); 749 if (error) 750 break; 751 pnp_create_devices(parent, &id, csn, resources, len); 752 found++; 753 } else 754 break; 755 756 /* 757 * Put this card back to the Sleep state and 758 * simultaneously move all cards which don't have a 759 * CSN yet to Isolation state. 760 */ 761 pnp_write(PNP_WAKE, 0); 762 } 763 764 /* 765 * Unless we have chosen the wrong read port, all cards will 766 * be in Sleep state. Put them back into WaitForKey for 767 * now. Their resources will be programmed later. 768 */ 769 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); 770 771 /* 772 * Cleanup. 773 */ 774 if (resources) 775 free(resources, M_TEMP); 776 777 return (found); 778} 779 780 781/* 782 * pnp_identify() 783 * 784 * autoconfiguration of pnp devices. This routine just runs the 785 * isolation protocol over several ports, until one is successful. 786 * 787 * may be called more than once ? 788 * 789 */ 790 791static void 792pnp_identify(driver_t *driver, device_t parent) 793{ 794 int num_pnp_devs; 795 796 /* Try various READ_DATA ports from 0x203-0x3ff */ 797 for (pnp_rd_port = 0x80; (pnp_rd_port < 0xff); pnp_rd_port += 0x10) { 798 if (bootverbose) 799 printf("pnp_identify: Trying Read_Port at %x\n", 800 (pnp_rd_port << 2) | 0x3); 801 802 num_pnp_devs = pnp_isolation_protocol(parent); 803 if (num_pnp_devs) 804 break; 805 } 806 if (bootverbose) 807 printf("PNP Identify complete\n"); 808} 809 810static device_method_t pnp_methods[] = { 811 /* Device interface */ 812 DEVMETHOD(device_identify, pnp_identify), 813 814 { 0, 0 } 815}; 816 817static driver_t pnp_driver = { 818 "pnp", 819 pnp_methods, 820 1, /* no softc */ 821}; 822 823static devclass_t pnp_devclass; 824 825DRIVER_MODULE(pnp, isa, pnp_driver, pnp_devclass, 0, 0); 826