pnp.c revision 83051
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: head/sys/isa/pnp.c 83051 2001-09-05 03:54:33Z yokota $ 27 * from: pnp.c,v 1.11 1999/05/06 22:11:19 peter Exp 28 */ 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/kernel.h> 33#include <sys/module.h> 34#include <sys/bus.h> 35#include <sys/malloc.h> 36#include <isa/isavar.h> 37#include <isa/pnpreg.h> 38#include <isa/pnpvar.h> 39#include <machine/bus.h> 40 41typedef struct _pnp_id { 42 u_int32_t vendor_id; 43 u_int32_t serial; 44 u_char checksum; 45} pnp_id; 46 47struct pnp_set_config_arg { 48 int csn; /* Card number to configure */ 49 int ldn; /* Logical device on card */ 50}; 51 52struct pnp_quirk { 53 u_int32_t vendor_id; /* Vendor of the card */ 54 u_int32_t logical_id; /* ID of the device with quirk */ 55 int type; 56#define PNP_QUIRK_WRITE_REG 1 /* Need to write a pnp register */ 57#define PNP_QUIRK_EXTRA_IO 2 /* Has extra io ports */ 58 int arg1; 59 int arg2; 60}; 61 62struct pnp_quirk pnp_quirks[] = { 63 /* 64 * The Gravis UltraSound needs register 0xf2 to be set to 0xff 65 * to enable power. 66 * XXX need to know the logical device id. 67 */ 68 { 0x0100561e /* GRV0001 */, 0, 69 PNP_QUIRK_WRITE_REG, 0xf2, 0xff }, 70 /* 71 * An emu8000 does not give us other than the first 72 * port. 73 */ 74 { 0x26008c0e /* SB16 */, 0x21008c0e, 75 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 76 { 0x42008c0e /* SB32(CTL0042) */, 0x21008c0e, 77 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 78 { 0x44008c0e /* SB32(CTL0044) */, 0x21008c0e, 79 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 80 { 0x49008c0e /* SB32(CTL0049) */, 0x21008c0e, 81 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 82 { 0xf1008c0e /* SB32(CTL00f1) */, 0x21008c0e, 83 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 84 { 0xc1008c0e /* SB64(CTL00c1) */, 0x22008c0e, 85 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 86 { 0xe4008c0e /* SB64(CTL00e4) */, 0x22008c0e, 87 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 88 89 { 0 } 90}; 91 92#if 0 93/* 94 * these entries are initialized using the autoconfig menu 95 * The struct is invalid (and must be initialized) if the first 96 * CSN is zero. The init code fills invalid entries with CSN 255 97 * which is not a supported value. 98 */ 99 100struct pnp_cinfo pnp_ldn_overrides[MAX_PNP_LDN] = { 101 { 0 } 102}; 103#endif 104 105/* The READ_DATA port that we are using currently */ 106static int pnp_rd_port; 107 108static void pnp_send_initiation_key(void); 109static int pnp_get_serial(pnp_id *p); 110static int pnp_isolation_protocol(device_t parent); 111 112char * 113pnp_eisaformat(u_int32_t id) 114{ 115 u_int8_t *data = (u_int8_t *) &id; 116 static char idbuf[8]; 117 const char hextoascii[] = "0123456789abcdef"; 118 119 idbuf[0] = '@' + ((data[0] & 0x7c) >> 2); 120 idbuf[1] = '@' + (((data[0] & 0x3) << 3) + ((data[1] & 0xe0) >> 5)); 121 idbuf[2] = '@' + (data[1] & 0x1f); 122 idbuf[3] = hextoascii[(data[2] >> 4)]; 123 idbuf[4] = hextoascii[(data[2] & 0xf)]; 124 idbuf[5] = hextoascii[(data[3] >> 4)]; 125 idbuf[6] = hextoascii[(data[3] & 0xf)]; 126 idbuf[7] = 0; 127 return(idbuf); 128} 129 130static void 131pnp_write(int d, u_char r) 132{ 133 outb (_PNP_ADDRESS, d); 134 outb (_PNP_WRITE_DATA, r); 135} 136 137#if 0 138 139static u_char 140pnp_read(int d) 141{ 142 outb (_PNP_ADDRESS, d); 143 return (inb(3 | (pnp_rd_port <<2))); 144} 145 146#endif 147 148/* 149 * Send Initiation LFSR as described in "Plug and Play ISA Specification", 150 * Intel May 94. 151 */ 152static void 153pnp_send_initiation_key() 154{ 155 int cur, i; 156 157 /* Reset the LSFR */ 158 outb(_PNP_ADDRESS, 0); 159 outb(_PNP_ADDRESS, 0); /* yes, we do need it twice! */ 160 161 cur = 0x6a; 162 outb(_PNP_ADDRESS, cur); 163 164 for (i = 1; i < 32; i++) { 165 cur = (cur >> 1) | (((cur ^ (cur >> 1)) << 7) & 0xff); 166 outb(_PNP_ADDRESS, cur); 167 } 168} 169 170 171/* 172 * Get the device's serial number. Returns 1 if the serial is valid. 173 */ 174static int 175pnp_get_serial(pnp_id *p) 176{ 177 int i, bit, valid = 0, sum = 0x6a; 178 u_char *data = (u_char *)p; 179 180 bzero(data, sizeof(char) * 9); 181 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); 182 for (i = 0; i < 72; i++) { 183 bit = inb((pnp_rd_port << 2) | 0x3) == 0x55; 184 DELAY(250); /* Delay 250 usec */ 185 186 /* Can't Short Circuit the next evaluation, so 'and' is last */ 187 bit = (inb((pnp_rd_port << 2) | 0x3) == 0xaa) && bit; 188 DELAY(250); /* Delay 250 usec */ 189 190 valid = valid || bit; 191 192 if (i < 64) 193 sum = (sum >> 1) | 194 (((sum ^ (sum >> 1) ^ bit) << 7) & 0xff); 195 196 data[i / 8] = (data[i / 8] >> 1) | (bit ? 0x80 : 0); 197 } 198 199 valid = valid && (data[8] == sum); 200 201 return valid; 202} 203 204/* 205 * Fill's the buffer with resource info from the device. 206 * Returns the number of characters read. 207 */ 208static int 209pnp_get_resource_info(u_char *buffer, int len) 210{ 211 int i, j, count; 212 u_char temp; 213 214 count = 0; 215 for (i = 0; i < len; i++) { 216 outb(_PNP_ADDRESS, PNP_STATUS); 217 for (j = 0; j < 100; j++) { 218 if ((inb((pnp_rd_port << 2) | 0x3)) & 0x1) 219 break; 220 DELAY(1); 221 } 222 if (j == 100) { 223 printf("PnP device failed to report resource data\n"); 224 return count; 225 } 226 outb(_PNP_ADDRESS, PNP_RESOURCE_DATA); 227 temp = inb((pnp_rd_port << 2) | 0x3); 228 if (buffer != NULL) 229 buffer[i] = temp; 230 count++; 231 } 232 return count; 233} 234 235#if 0 236/* 237 * write_pnp_parms initializes a logical device with the parms 238 * in d, and then activates the board if the last parameter is 1. 239 */ 240 241static int 242write_pnp_parms(struct pnp_cinfo *d, pnp_id *p, int ldn) 243{ 244 int i, empty = -1 ; 245 246 pnp_write (SET_LDN, ldn ); 247 i = pnp_read(SET_LDN) ; 248 if (i != ldn) { 249 printf("Warning: LDN %d does not exist\n", ldn); 250 } 251 for (i = 0; i < 8; i++) { 252 pnp_write(IO_CONFIG_BASE + i * 2, d->ic_port[i] >> 8 ); 253 pnp_write(IO_CONFIG_BASE + i * 2 + 1, d->ic_port[i] & 0xff ); 254 } 255 for (i = 0; i < 4; i++) { 256 pnp_write(MEM_CONFIG + i*8, (d->ic_mem[i].base >> 16) & 0xff ); 257 pnp_write(MEM_CONFIG + i*8+1, (d->ic_mem[i].base >> 8) & 0xff ); 258 pnp_write(MEM_CONFIG + i*8+2, d->ic_mem[i].control & 0xff ); 259 pnp_write(MEM_CONFIG + i*8+3, (d->ic_mem[i].range >> 16) & 0xff ); 260 pnp_write(MEM_CONFIG + i*8+4, (d->ic_mem[i].range >> 8) & 0xff ); 261 } 262 for (i = 0; i < 2; i++) { 263 pnp_write(IRQ_CONFIG + i*2 , d->irq[i] ); 264 pnp_write(IRQ_CONFIG + i*2 + 1, d->irq_type[i] ); 265 pnp_write(DRQ_CONFIG + i, d->drq[i] ); 266 } 267 /* 268 * store parameters read into the current kernel 269 * so manual editing next time is easier 270 */ 271 for (i = 0 ; i < MAX_PNP_LDN; i++) { 272 if (pnp_ldn_overrides[i].csn == d->csn && 273 pnp_ldn_overrides[i].ldn == ldn) { 274 d->flags = pnp_ldn_overrides[i].flags ; 275 pnp_ldn_overrides[i] = *d ; 276 break ; 277 } else if (pnp_ldn_overrides[i].csn < 1 || 278 pnp_ldn_overrides[i].csn == 255) 279 empty = i ; 280 } 281 if (i== MAX_PNP_LDN && empty != -1) 282 pnp_ldn_overrides[empty] = *d; 283 284 /* 285 * Here should really perform the range check, and 286 * return a failure if not successful. 287 */ 288 pnp_write (IO_RANGE_CHECK, 0); 289 DELAY(1000); /* XXX is it really necessary ? */ 290 pnp_write (ACTIVATE, d->enable ? 1 : 0); 291 DELAY(1000); /* XXX is it really necessary ? */ 292 return 1 ; 293} 294#endif 295 296/* 297 * This function is called after the bus has assigned resource 298 * locations for a logical device. 299 */ 300static void 301pnp_set_config(void *arg, struct isa_config *config, int enable) 302{ 303 int csn = ((struct pnp_set_config_arg *) arg)->csn; 304 int ldn = ((struct pnp_set_config_arg *) arg)->ldn; 305 int i; 306 307 /* 308 * First put all cards into Sleep state with the initiation 309 * key, then put our card into Config state. 310 */ 311 pnp_send_initiation_key(); 312 pnp_write(PNP_WAKE, csn); 313 314 /* 315 * Select our logical device so that we can program it. 316 */ 317 pnp_write(PNP_SET_LDN, ldn); 318 319 /* 320 * Constrain the number of resources we will try to program 321 */ 322 if (config->ic_nmem > ISA_PNP_NMEM) { 323 printf("too many ISA memory ranges (%d > %d)\n", config->ic_nmem, ISA_PNP_NMEM); 324 config->ic_nmem = ISA_PNP_NMEM; 325 } 326 if (config->ic_nport > ISA_PNP_NPORT) { 327 printf("too many ISA I/O ranges (%d > %d)\n", config->ic_nport, ISA_PNP_NPORT); 328 config->ic_nport = ISA_PNP_NPORT; 329 } 330 if (config->ic_nirq > ISA_PNP_NIRQ) { 331 printf("too many ISA IRQs (%d > %d)\n", config->ic_nirq, ISA_PNP_NIRQ); 332 config->ic_nirq = ISA_PNP_NIRQ; 333 } 334 if (config->ic_ndrq > ISA_PNP_NDRQ) { 335 printf("too many ISA DRQs (%d > %d)\n", config->ic_ndrq, ISA_PNP_NDRQ); 336 config->ic_ndrq = ISA_PNP_NDRQ; 337 } 338 339 /* 340 * Now program the resources. 341 */ 342 for (i = 0; i < config->ic_nmem; i++) { 343 u_int32_t start; 344 u_int32_t size; 345 346 /* XXX: should handle memory control register, 32 bit memory */ 347 if (config->ic_mem[i].ir_size == 0) { 348 pnp_write(PNP_MEM_BASE_HIGH(i), 0); 349 pnp_write(PNP_MEM_BASE_LOW(i), 0); 350 pnp_write(PNP_MEM_RANGE_HIGH(i), 0); 351 pnp_write(PNP_MEM_RANGE_LOW(i), 0); 352 } else { 353 start = config->ic_mem[i].ir_start; 354 size = config->ic_mem[i].ir_size; 355 if (start & 0xff) 356 panic("pnp_set_config: bogus memory assignment"); 357 pnp_write(PNP_MEM_BASE_HIGH(i), (start >> 16) & 0xff); 358 pnp_write(PNP_MEM_BASE_LOW(i), (start >> 8) & 0xff); 359 pnp_write(PNP_MEM_RANGE_HIGH(i), (size >> 16) & 0xff); 360 pnp_write(PNP_MEM_RANGE_LOW(i), (size >> 8) & 0xff); 361 } 362 } 363 for (; i < ISA_PNP_NMEM; i++) { 364 pnp_write(PNP_MEM_BASE_HIGH(i), 0); 365 pnp_write(PNP_MEM_BASE_LOW(i), 0); 366 pnp_write(PNP_MEM_RANGE_HIGH(i), 0); 367 pnp_write(PNP_MEM_RANGE_LOW(i), 0); 368 } 369 370 for (i = 0; i < config->ic_nport; i++) { 371 u_int32_t start; 372 373 if (config->ic_port[i].ir_size == 0) { 374 pnp_write(PNP_IO_BASE_HIGH(i), 0); 375 pnp_write(PNP_IO_BASE_LOW(i), 0); 376 } else { 377 start = config->ic_port[i].ir_start; 378 pnp_write(PNP_IO_BASE_HIGH(i), (start >> 8) & 0xff); 379 pnp_write(PNP_IO_BASE_LOW(i), (start >> 0) & 0xff); 380 } 381 } 382 for (; i < ISA_PNP_NPORT; i++) { 383 pnp_write(PNP_IO_BASE_HIGH(i), 0); 384 pnp_write(PNP_IO_BASE_LOW(i), 0); 385 } 386 387 for (i = 0; i < config->ic_nirq; i++) { 388 int irq; 389 390 /* XXX: interrupt type */ 391 if (config->ic_irqmask[i] == 0) { 392 pnp_write(PNP_IRQ_LEVEL(i), 0); 393 pnp_write(PNP_IRQ_TYPE(i), 2); 394 } else { 395 irq = ffs(config->ic_irqmask[i]) - 1; 396 pnp_write(PNP_IRQ_LEVEL(i), irq); 397 pnp_write(PNP_IRQ_TYPE(i), 2); /* XXX */ 398 } 399 } 400 for (; i < ISA_PNP_NIRQ; i++) { 401 /* 402 * IRQ 0 is not a valid interrupt selection and 403 * represents no interrupt selection. 404 */ 405 pnp_write(PNP_IRQ_LEVEL(i), 0); 406 pnp_write(PNP_IRQ_TYPE(i), 2); 407 } 408 409 for (i = 0; i < config->ic_ndrq; i++) { 410 int drq; 411 412 if (config->ic_drqmask[i] == 0) { 413 pnp_write(PNP_DMA_CHANNEL(i), 4); 414 } else { 415 drq = ffs(config->ic_drqmask[i]) - 1; 416 pnp_write(PNP_DMA_CHANNEL(i), drq); 417 } 418 } 419 for (; i < ISA_PNP_NDRQ; i++) { 420 /* 421 * DMA channel 4, the cascade channel is used to 422 * indicate no DMA channel is active. 423 */ 424 pnp_write(PNP_DMA_CHANNEL(i), 4); 425 } 426 427 pnp_write(PNP_ACTIVATE, enable ? 1 : 0); 428 429 /* 430 * Wake everyone up again, we are finished. 431 */ 432 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); 433} 434 435/* 436 * Process quirks for a logical device.. The card must be in Config state. 437 */ 438void 439pnp_check_quirks(u_int32_t vendor_id, u_int32_t logical_id, int ldn, struct isa_config *config) 440{ 441 struct pnp_quirk *qp; 442 443 for (qp = &pnp_quirks[0]; qp->vendor_id; qp++) { 444 if (qp->vendor_id == vendor_id 445 && (qp->logical_id == 0 446 || qp->logical_id == logical_id)) { 447 switch (qp->type) { 448 case PNP_QUIRK_WRITE_REG: 449 pnp_write(PNP_SET_LDN, ldn); 450 pnp_write(qp->arg1, qp->arg2); 451 break; 452 case PNP_QUIRK_EXTRA_IO: 453 if (config == NULL) 454 break; 455 if (qp->arg1 != 0) { 456 config->ic_nport++; 457 config->ic_port[config->ic_nport - 1] = config->ic_port[0]; 458 config->ic_port[config->ic_nport - 1].ir_start += qp->arg1; 459 config->ic_port[config->ic_nport - 1].ir_end += qp->arg1; 460 } 461 if (qp->arg2 != 0) { 462 config->ic_nport++; 463 config->ic_port[config->ic_nport - 1] = config->ic_port[0]; 464 config->ic_port[config->ic_nport - 1].ir_start += qp->arg2; 465 config->ic_port[config->ic_nport - 1].ir_end += qp->arg2; 466 } 467 break; 468 } 469 } 470 } 471} 472 473/* 474 * Scan Resource Data for Logical Devices. 475 * 476 * This function exits as soon as it gets an error reading *ANY* 477 * Resource Data or it reaches the end of Resource Data. In the first 478 * case the return value will be TRUE, FALSE otherwise. 479 */ 480static int 481pnp_create_devices(device_t parent, pnp_id *p, int csn, 482 u_char *resources, int len) 483{ 484 u_char tag, *resp, *resinfo, *startres = 0; 485 int large_len, scanning = len, retval = FALSE; 486 u_int32_t logical_id; 487 u_int32_t compat_id; 488 device_t dev = 0; 489 int ldn = 0; 490 struct pnp_set_config_arg *csnldn; 491 char buf[100]; 492 char *desc = 0; 493 494 resp = resources; 495 while (scanning > 0) { 496 tag = *resp++; 497 scanning--; 498 if (PNP_RES_TYPE(tag) != 0) { 499 /* Large resource */ 500 if (scanning < 2) { 501 scanning = 0; 502 continue; 503 } 504 large_len = resp[0] + (resp[1] << 8); 505 resp += 2; 506 507 if (scanning < large_len) { 508 scanning = 0; 509 continue; 510 } 511 resinfo = resp; 512 resp += large_len; 513 scanning -= large_len; 514 515 if (PNP_LRES_NUM(tag) == PNP_TAG_ID_ANSI) { 516 if (large_len > sizeof(buf) - 1) 517 large_len = sizeof(buf) - 1; 518 bcopy(resinfo, buf, large_len); 519 520 /* 521 * Trim trailing spaces. 522 */ 523 while (buf[large_len-1] == ' ') 524 large_len--; 525 buf[large_len] = '\0'; 526 desc = buf; 527 if (dev) 528 device_set_desc_copy(dev, desc); 529 continue; 530 } 531 532 continue; 533 } 534 535 /* Small resource */ 536 if (scanning < PNP_SRES_LEN(tag)) { 537 scanning = 0; 538 continue; 539 } 540 resinfo = resp; 541 resp += PNP_SRES_LEN(tag); 542 scanning -= PNP_SRES_LEN(tag);; 543 544 switch (PNP_SRES_NUM(tag)) { 545 case PNP_TAG_LOGICAL_DEVICE: 546 /* 547 * Parse the resources for the previous 548 * logical device (if any). 549 */ 550 if (startres) { 551 pnp_parse_resources(dev, startres, 552 resinfo - startres - 1, 553 ldn); 554 dev = 0; 555 startres = 0; 556 } 557 558 /* 559 * A new logical device. Scan for end of 560 * resources. 561 */ 562 bcopy(resinfo, &logical_id, 4); 563 pnp_check_quirks(p->vendor_id, logical_id, ldn, NULL); 564 compat_id = 0; 565 dev = BUS_ADD_CHILD(parent, ISA_ORDER_PNP, NULL, -1); 566 if (desc) 567 device_set_desc_copy(dev, desc); 568 isa_set_vendorid(dev, p->vendor_id); 569 isa_set_serial(dev, p->serial); 570 isa_set_logicalid(dev, logical_id); 571 isa_set_configattr(dev, 572 ISACFGATTR_CANDISABLE | 573 ISACFGATTR_DYNAMIC); 574 csnldn = malloc(sizeof *csnldn, M_DEVBUF, M_NOWAIT); 575 if (!csnldn) { 576 device_printf(parent, 577 "out of memory\n"); 578 scanning = 0; 579 break; 580 } 581 csnldn->csn = csn; 582 csnldn->ldn = ldn; 583 ISA_SET_CONFIG_CALLBACK(parent, dev, 584 pnp_set_config, csnldn); 585 ldn++; 586 startres = resp; 587 break; 588 589 case PNP_TAG_END: 590 if (!startres) { 591 device_printf(parent, 592 "malformed resources\n"); 593 scanning = 0; 594 break; 595 } 596 pnp_parse_resources(dev, startres, 597 resinfo - startres - 1, ldn); 598 dev = 0; 599 startres = 0; 600 scanning = 0; 601 break; 602 603 default: 604 /* Skip this resource */ 605 break; 606 } 607 } 608 609 return retval; 610} 611 612/* 613 * Read 'amount' bytes of resources from the card, allocating memory 614 * as needed. If a buffer is already available, it should be passed in 615 * '*resourcesp' and its length in '*spacep'. The number of resource 616 * bytes already in the buffer should be passed in '*lenp'. The memory 617 * allocated will be returned in '*resourcesp' with its size and the 618 * number of bytes of resources in '*spacep' and '*lenp' respectively. 619 */ 620static int 621pnp_read_bytes(int amount, u_char **resourcesp, int *spacep, int *lenp) 622{ 623 u_char *resources = *resourcesp; 624 u_char *newres; 625 int space = *spacep; 626 int len = *lenp; 627 628 if (space == 0) { 629 space = 1024; 630 resources = malloc(space, M_TEMP, M_NOWAIT); 631 if (!resources) 632 return ENOMEM; 633 } 634 635 if (len + amount > space) { 636 int extra = 1024; 637 while (len + amount > space + extra) 638 extra += 1024; 639 newres = malloc(space + extra, M_TEMP, M_NOWAIT); 640 if (!newres) 641 return ENOMEM; 642 bcopy(resources, newres, len); 643 free(resources, M_TEMP); 644 resources = newres; 645 space += extra; 646 } 647 648 if (pnp_get_resource_info(resources + len, amount) != amount) 649 return EINVAL; 650 len += amount; 651 652 *resourcesp = resources; 653 *spacep = space; 654 *lenp = len; 655 656 return 0; 657} 658 659/* 660 * Read all resources from the card, allocating memory as needed. If a 661 * buffer is already available, it should be passed in '*resourcesp' 662 * and its length in '*spacep'. The memory allocated will be returned 663 * in '*resourcesp' with its size and the number of bytes of resources 664 * in '*spacep' and '*lenp' respectively. 665 */ 666static int 667pnp_read_resources(u_char **resourcesp, int *spacep, int *lenp) 668{ 669 u_char *resources = *resourcesp; 670 int space = *spacep; 671 int len = 0; 672 int error, done; 673 u_char tag; 674 675 error = 0; 676 done = 0; 677 while (!done) { 678 error = pnp_read_bytes(1, &resources, &space, &len); 679 if (error) 680 goto out; 681 tag = resources[len-1]; 682 if (PNP_RES_TYPE(tag) == 0) { 683 /* 684 * Small resource, read contents. 685 */ 686 error = pnp_read_bytes(PNP_SRES_LEN(tag), 687 &resources, &space, &len); 688 if (error) 689 goto out; 690 if (PNP_SRES_NUM(tag) == PNP_TAG_END) 691 done = 1; 692 } else { 693 /* 694 * Large resource, read length and contents. 695 */ 696 error = pnp_read_bytes(2, &resources, &space, &len); 697 if (error) 698 goto out; 699 error = pnp_read_bytes(resources[len-2] 700 + (resources[len-1] << 8), 701 &resources, &space, &len); 702 if (error) 703 goto out; 704 } 705 } 706 707 out: 708 *resourcesp = resources; 709 *spacep = space; 710 *lenp = len; 711 return error; 712} 713 714/* 715 * Run the isolation protocol. Use pnp_rd_port as the READ_DATA port 716 * value (caller should try multiple READ_DATA locations before giving 717 * up). Upon exiting, all cards are aware that they should use 718 * pnp_rd_port as the READ_DATA port. 719 * 720 * In the first pass, a csn is assigned to each board and pnp_id's 721 * are saved to an array, pnp_devices. In the second pass, each 722 * card is woken up and the device configuration is called. 723 */ 724static int 725pnp_isolation_protocol(device_t parent) 726{ 727 int csn; 728 pnp_id id; 729 int found = 0, len; 730 u_char *resources = 0; 731 int space = 0; 732 int error; 733 734 /* 735 * Put all cards into the Sleep state so that we can clear 736 * their CSNs. 737 */ 738 pnp_send_initiation_key(); 739 740 /* 741 * Clear the CSN for all cards. 742 */ 743 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_RESET_CSN); 744 745 /* 746 * Move all cards to the Isolation state. 747 */ 748 pnp_write(PNP_WAKE, 0); 749 750 /* 751 * Tell them where the read point is going to be this time. 752 */ 753 pnp_write(PNP_SET_RD_DATA, pnp_rd_port); 754 755 for (csn = 1; csn < PNP_MAX_CARDS; csn++) { 756 /* 757 * Start the serial isolation protocol. 758 */ 759 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); 760 DELAY(1000); /* Delay 1 msec */ 761 762 if (pnp_get_serial(&id)) { 763 /* 764 * We have read the id from a card 765 * successfully. The card which won the 766 * isolation protocol will be in Isolation 767 * mode and all others will be in Sleep. 768 * Program the CSN of the isolated card 769 * (taking it to Config state) and read its 770 * resources, creating devices as we find 771 * logical devices on the card. 772 */ 773 pnp_write(PNP_SET_CSN, csn); 774 error = pnp_read_resources(&resources, 775 &space, 776 &len); 777 if (error) 778 break; 779 pnp_create_devices(parent, &id, csn, 780 resources, len); 781 found++; 782 } else 783 break; 784 785 /* 786 * Put this card back to the Sleep state and 787 * simultaneously move all cards which don't have a 788 * CSN yet to Isolation state. 789 */ 790 pnp_write(PNP_WAKE, 0); 791 } 792 793 /* 794 * Unless we have chosen the wrong read port, all cards will 795 * be in Sleep state. Put them back into WaitForKey for 796 * now. Their resources will be programmed later. 797 */ 798 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); 799 800 /* 801 * Cleanup. 802 */ 803 if (resources) 804 free(resources, M_TEMP); 805 806 return found; 807} 808 809 810/* 811 * pnp_identify() 812 * 813 * autoconfiguration of pnp devices. This routine just runs the 814 * isolation protocol over several ports, until one is successful. 815 * 816 * may be called more than once ? 817 * 818 */ 819 820static void 821pnp_identify(driver_t *driver, device_t parent) 822{ 823 int num_pnp_devs; 824 825#if 0 826 if (pnp_ldn_overrides[0].csn == 0) { 827 if (bootverbose) 828 printf("Initializing PnP override table\n"); 829 bzero (pnp_ldn_overrides, sizeof(pnp_ldn_overrides)); 830 pnp_ldn_overrides[0].csn = 255 ; 831 } 832#endif 833 834 /* Try various READ_DATA ports from 0x203-0x3ff */ 835 for (pnp_rd_port = 0x80; (pnp_rd_port < 0xff); pnp_rd_port += 0x10) { 836 if (bootverbose) 837 printf("Trying Read_Port at %x\n", (pnp_rd_port << 2) | 0x3); 838 839 num_pnp_devs = pnp_isolation_protocol(parent); 840 if (num_pnp_devs) 841 break; 842 } 843} 844 845static device_method_t pnp_methods[] = { 846 /* Device interface */ 847 DEVMETHOD(device_identify, pnp_identify), 848 849 { 0, 0 } 850}; 851 852static driver_t pnp_driver = { 853 "pnp", 854 pnp_methods, 855 1, /* no softc */ 856}; 857 858static devclass_t pnp_devclass; 859 860DRIVER_MODULE(pnp, isa, pnp_driver, pnp_devclass, 0, 0); 861