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sys/isa/pnp.c
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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: releng/11.2/sys/isa/pnp.c 299006 2016-05-03 21:51:52Z pfg $"); 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 #ifdef PC98 98 /* Some NEC PnP cards have 9 bytes serial code. */ 99 static 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 */ 109 static int pnp_rd_port; 110 111 static void pnp_send_initiation_key(void); 112 static int pnp_get_serial(pnp_id *p); 113 static int pnp_isolation_protocol(device_t parent); 114 115 char * 116 pnp_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 } 134 135 static void 136 pnp_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 */ 146 static void 147 pnp_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 */ 168 static int 169 pnp_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 */ 200 static int 201 pnp_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(10); 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 */ 231 static void 232 pnp_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 */ 373 void 374 pnp_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 */ 415 static int 416 pnp_create_devices(device_t parent, pnp_id *p, int csn, 417 u_char *resources, int len) 418 { 419 u_char tag, *resp, *resinfo, *startres = NULL; 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 = NULL; 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 * identifier string. Skip 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 = NULL; 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 isa_set_pnp_csn(dev, csn); 526 isa_set_pnp_ldn(dev, ldn); 527 ldn++; 528 startres = resp; 529 break; 530 531 case PNP_TAG_END: 532 if (!startres) { 533 device_printf(parent, "malformed resources\n"); 534 scanning = 0; 535 break; 536 } 537 pnp_parse_resources(dev, startres, 538 resinfo - startres - 1, ldn); 539 dev = 0; 540 startres = NULL; 541 scanning = 0; 542 break; 543 544 default: 545 /* Skip this resource */ 546 break; 547 } 548 } 549 550 return (retval); 551 } 552 553 /* 554 * Read 'amount' bytes of resources from the card, allocating memory 555 * as needed. If a buffer is already available, it should be passed in 556 * '*resourcesp' and its length in '*spacep'. The number of resource 557 * bytes already in the buffer should be passed in '*lenp'. The memory 558 * allocated will be returned in '*resourcesp' with its size and the 559 * number of bytes of resources in '*spacep' and '*lenp' respectively. 560 * 561 * XXX: Multiple problems here, we forget to free() stuff in one 562 * XXX: error return, and in another case we free (*resourcesp) but 563 * XXX: don't tell the caller. 564 */ 565 static int 566 pnp_read_bytes(int amount, u_char **resourcesp, int *spacep, int *lenp) 567 { 568 u_char *resources = *resourcesp; 569 u_char *newres; 570 int space = *spacep; 571 int len = *lenp; 572 573 if (space == 0) { 574 space = 1024; 575 resources = malloc(space, M_TEMP, M_NOWAIT); 576 if (!resources) 577 return (ENOMEM); 578 } 579 580 if (len + amount > space) { 581 int extra = 1024; 582 while (len + amount > space + extra) 583 extra += 1024; 584 newres = malloc(space + extra, M_TEMP, M_NOWAIT); 585 if (!newres) { 586 /* XXX: free resources */ 587 return (ENOMEM); 588 } 589 bcopy(resources, newres, len); 590 free(resources, M_TEMP); 591 resources = newres; 592 space += extra; 593 } 594 595 if (pnp_get_resource_info(resources + len, amount) != amount) 596 return (EINVAL); 597 len += amount; 598 599 *resourcesp = resources; 600 *spacep = space; 601 *lenp = len; 602 603 return (0); 604 } 605 606 /* 607 * Read all resources from the card, allocating memory as needed. If a 608 * buffer is already available, it should be passed in '*resourcesp' 609 * and its length in '*spacep'. The memory allocated will be returned 610 * in '*resourcesp' with its size and the number of bytes of resources 611 * in '*spacep' and '*lenp' respectively. 612 */ 613 static int 614 pnp_read_resources(u_char **resourcesp, int *spacep, int *lenp) 615 { 616 u_char *resources = *resourcesp; 617 int space = *spacep; 618 int len = 0; 619 int error, done; 620 u_char tag; 621 622 error = 0; 623 done = 0; 624 while (!done) { 625 error = pnp_read_bytes(1, &resources, &space, &len); 626 if (error) 627 goto out; 628 tag = resources[len-1]; 629 if (PNP_RES_TYPE(tag) == 0) { 630 /* 631 * Small resource, read contents. 632 */ 633 error = pnp_read_bytes(PNP_SRES_LEN(tag), 634 &resources, &space, &len); 635 if (error) 636 goto out; 637 if (PNP_SRES_NUM(tag) == PNP_TAG_END) 638 done = 1; 639 } else { 640 /* 641 * Large resource, read length and contents. 642 */ 643 error = pnp_read_bytes(2, &resources, &space, &len); 644 if (error) 645 goto out; 646 error = pnp_read_bytes(resources[len-2] 647 + (resources[len-1] << 8), &resources, &space, 648 &len); 649 if (error) 650 goto out; 651 } 652 } 653 654 out: 655 *resourcesp = resources; 656 *spacep = space; 657 *lenp = len; 658 return (error); 659 } 660 661 /* 662 * Run the isolation protocol. Use pnp_rd_port as the READ_DATA port 663 * value (caller should try multiple READ_DATA locations before giving 664 * up). Upon exiting, all cards are aware that they should use 665 * pnp_rd_port as the READ_DATA port. 666 * 667 * In the first pass, a csn is assigned to each board and pnp_id's 668 * are saved to an array, pnp_devices. In the second pass, each 669 * card is woken up and the device configuration is called. 670 */ 671 static int 672 pnp_isolation_protocol(device_t parent) 673 { 674 int csn; 675 pnp_id id; 676 int found = 0, len; 677 u_char *resources = NULL; 678 int space = 0; 679 int error; 680 #ifdef PC98 681 int n, necpnp; 682 u_char buffer[10]; 683 #endif 684 685 /* 686 * Put all cards into the Sleep state so that we can clear 687 * their CSNs. 688 */ 689 pnp_send_initiation_key(); 690 691 /* 692 * Clear the CSN for all cards. 693 */ 694 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_RESET_CSN); 695 696 /* 697 * Move all cards to the Isolation state. 698 */ 699 pnp_write(PNP_WAKE, 0); 700 701 /* 702 * Tell them where the read point is going to be this time. 703 */ 704 pnp_write(PNP_SET_RD_DATA, pnp_rd_port); 705 706 for (csn = 1; csn < PNP_MAX_CARDS; csn++) { 707 /* 708 * Start the serial isolation protocol. 709 */ 710 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); 711 DELAY(1000); /* Delay 1 msec */ 712 713 if (pnp_get_serial(&id)) { 714 /* 715 * We have read the id from a card 716 * successfully. The card which won the 717 * isolation protocol will be in Isolation 718 * mode and all others will be in Sleep. 719 * Program the CSN of the isolated card 720 * (taking it to Config state) and read its 721 * resources, creating devices as we find 722 * logical devices on the card. 723 */ 724 pnp_write(PNP_SET_CSN, csn); 725 #ifdef PC98 726 if (bootverbose) 727 printf("PnP Vendor ID = %x\n", id.vendor_id); 728 /* Check for NEC PnP (9 bytes serial). */ 729 for (n = necpnp = 0; necids[n].vendor_id; n++) { 730 if (id.vendor_id == necids[n].vendor_id) { 731 necpnp = 1; 732 break; 733 } 734 } 735 if (necpnp) { 736 if (bootverbose) 737 printf("An NEC-PnP card (%s).\n", 738 pnp_eisaformat(id.vendor_id)); 739 /* Read dummy 9 bytes serial area. */ 740 pnp_get_resource_info(buffer, 9); 741 } else { 742 if (bootverbose) 743 printf("A Normal-ISA-PnP card (%s).\n", 744 pnp_eisaformat(id.vendor_id)); 745 } 746 #endif 747 if (bootverbose) 748 printf("Reading PnP configuration for %s.\n", 749 pnp_eisaformat(id.vendor_id)); 750 error = pnp_read_resources(&resources, &space, &len); 751 if (error) 752 break; 753 pnp_create_devices(parent, &id, csn, resources, len); 754 found++; 755 } else 756 break; 757 758 /* 759 * Put this card back to the Sleep state and 760 * simultaneously move all cards which don't have a 761 * CSN yet to Isolation state. 762 */ 763 pnp_write(PNP_WAKE, 0); 764 } 765 766 /* 767 * Unless we have chosen the wrong read port, all cards will 768 * be in Sleep state. Put them back into WaitForKey for 769 * now. Their resources will be programmed later. 770 */ 771 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); 772 773 /* 774 * Cleanup. 775 */ 776 if (resources) 777 free(resources, M_TEMP); 778 779 return (found); 780 } 781 782 783 /* 784 * pnp_identify() 785 * 786 * autoconfiguration of pnp devices. This routine just runs the 787 * isolation protocol over several ports, until one is successful. 788 * 789 * may be called more than once ? 790 * 791 */ 792 793 static void 794 pnp_identify(driver_t *driver, device_t parent) 795 { 796 int num_pnp_devs; 797 798 /* Try various READ_DATA ports from 0x203-0x3ff */ 799 for (pnp_rd_port = 0x80; (pnp_rd_port < 0xff); pnp_rd_port += 0x10) { 800 if (bootverbose) 801 printf("pnp_identify: Trying Read_Port at %x\n", 802 (pnp_rd_port << 2) | 0x3); 803 804 num_pnp_devs = pnp_isolation_protocol(parent); 805 if (num_pnp_devs) 806 break; 807 } 808 if (bootverbose) 809 printf("PNP Identify complete\n"); 810 } 811 812 static device_method_t pnp_methods[] = { 813 /* Device interface */ 814 DEVMETHOD(device_identify, pnp_identify), 815 816 { 0, 0 } 817 }; 818 819 static driver_t pnp_driver = { 820 "pnp", 821 pnp_methods, 822 1, /* no softc */ 823 }; 824 825 static devclass_t pnp_devclass; 826 827 DRIVER_MODULE(pnp, isa, pnp_driver, pnp_devclass, 0, 0);
Cache object: ec7afcdda405794aec3035b4b4406255
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