pnp.c revision 116181
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 116181 2003-06-11 00:34:37Z obrien $"); 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/malloc.h> 38#include <isa/isavar.h> 39#include <isa/pnpreg.h> 40#include <isa/pnpvar.h> 41#include <machine/bus.h> 42 43typedef struct _pnp_id { 44 u_int32_t vendor_id; 45 u_int32_t serial; 46 u_char checksum; 47} pnp_id; 48 49struct pnp_set_config_arg { 50 int csn; /* Card number to configure */ 51 int ldn; /* Logical device on card */ 52}; 53 54struct pnp_quirk { 55 u_int32_t vendor_id; /* Vendor of the card */ 56 u_int32_t logical_id; /* ID of the device with quirk */ 57 int type; 58#define PNP_QUIRK_WRITE_REG 1 /* Need to write a pnp register */ 59#define PNP_QUIRK_EXTRA_IO 2 /* Has extra io ports */ 60 int arg1; 61 int arg2; 62}; 63 64struct 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 { 0x26008c0e /* SB16 */, 0x21008c0e, 77 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 78 { 0x42008c0e /* SB32(CTL0042) */, 0x21008c0e, 79 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 80 { 0x44008c0e /* SB32(CTL0044) */, 0x21008c0e, 81 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 82 { 0x49008c0e /* SB32(CTL0049) */, 0x21008c0e, 83 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 84 { 0xf1008c0e /* SB32(CTL00f1) */, 0x21008c0e, 85 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 86 { 0xc1008c0e /* SB64(CTL00c1) */, 0x22008c0e, 87 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 88 { 0xc5008c0e /* SB64(CTL00c5) */, 0x22008c0e, 89 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 90 { 0xe4008c0e /* SB64(CTL00e4) */, 0x22008c0e, 91 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 92 93 { 0 } 94}; 95 96#ifdef PC98 97/* Some NEC PnP cards have 9 bytes serial code. */ 98static pnp_id necids[] = { 99 {0x4180a3b8, 0xffffffff, 0x00}, /* PC-9801CB-B04 (NEC8041) */ 100 {0x5181a3b8, 0xffffffff, 0x46}, /* PC-9821CB2-B04(NEC8151) */ 101 {0x5182a3b8, 0xffffffff, 0xb8}, /* PC-9801-XX (NEC8251) */ 102 {0x9181a3b8, 0xffffffff, 0x00}, /* PC-9801-120 (NEC8191) */ 103 {0, 0, 0} 104}; 105#endif 106 107#if 0 108/* 109 * these entries are initialized using the autoconfig menu 110 * The struct is invalid (and must be initialized) if the first 111 * CSN is zero. The init code fills invalid entries with CSN 255 112 * which is not a supported value. 113 */ 114 115struct pnp_cinfo pnp_ldn_overrides[MAX_PNP_LDN] = { 116 { 0 } 117}; 118#endif 119 120/* The READ_DATA port that we are using currently */ 121static int pnp_rd_port; 122 123static void pnp_send_initiation_key(void); 124static int pnp_get_serial(pnp_id *p); 125static int pnp_isolation_protocol(device_t parent); 126 127char * 128pnp_eisaformat(u_int32_t id) 129{ 130 u_int8_t *data = (u_int8_t *) &id; 131 static char idbuf[8]; 132 const char hextoascii[] = "0123456789abcdef"; 133 134 idbuf[0] = '@' + ((data[0] & 0x7c) >> 2); 135 idbuf[1] = '@' + (((data[0] & 0x3) << 3) + ((data[1] & 0xe0) >> 5)); 136 idbuf[2] = '@' + (data[1] & 0x1f); 137 idbuf[3] = hextoascii[(data[2] >> 4)]; 138 idbuf[4] = hextoascii[(data[2] & 0xf)]; 139 idbuf[5] = hextoascii[(data[3] >> 4)]; 140 idbuf[6] = hextoascii[(data[3] & 0xf)]; 141 idbuf[7] = 0; 142 return(idbuf); 143} 144 145static void 146pnp_write(int d, u_char r) 147{ 148 outb (_PNP_ADDRESS, d); 149 outb (_PNP_WRITE_DATA, r); 150} 151 152#if 0 153 154static u_char 155pnp_read(int d) 156{ 157 outb (_PNP_ADDRESS, d); 158 return (inb(3 | (pnp_rd_port <<2))); 159} 160 161#endif 162 163/* 164 * Send Initiation LFSR as described in "Plug and Play ISA Specification", 165 * Intel May 94. 166 */ 167static void 168pnp_send_initiation_key() 169{ 170 int cur, i; 171 172 /* Reset the LSFR */ 173 outb(_PNP_ADDRESS, 0); 174 outb(_PNP_ADDRESS, 0); /* yes, we do need it twice! */ 175 176 cur = 0x6a; 177 outb(_PNP_ADDRESS, cur); 178 179 for (i = 1; i < 32; i++) { 180 cur = (cur >> 1) | (((cur ^ (cur >> 1)) << 7) & 0xff); 181 outb(_PNP_ADDRESS, cur); 182 } 183} 184 185 186/* 187 * Get the device's serial number. Returns 1 if the serial is valid. 188 */ 189static int 190pnp_get_serial(pnp_id *p) 191{ 192 int i, bit, valid = 0, sum = 0x6a; 193 u_char *data = (u_char *)p; 194 195 bzero(data, sizeof(char) * 9); 196 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); 197 for (i = 0; i < 72; i++) { 198 bit = inb((pnp_rd_port << 2) | 0x3) == 0x55; 199 DELAY(250); /* Delay 250 usec */ 200 201 /* Can't Short Circuit the next evaluation, so 'and' is last */ 202 bit = (inb((pnp_rd_port << 2) | 0x3) == 0xaa) && bit; 203 DELAY(250); /* Delay 250 usec */ 204 205 valid = valid || bit; 206 207 if (i < 64) 208 sum = (sum >> 1) | 209 (((sum ^ (sum >> 1) ^ bit) << 7) & 0xff); 210 211 data[i / 8] = (data[i / 8] >> 1) | (bit ? 0x80 : 0); 212 } 213 214 valid = valid && (data[8] == sum); 215 216 return valid; 217} 218 219/* 220 * Fill's the buffer with resource info from the device. 221 * Returns the number of characters read. 222 */ 223static int 224pnp_get_resource_info(u_char *buffer, int len) 225{ 226 int i, j, count; 227 u_char temp; 228 229 count = 0; 230 for (i = 0; i < len; i++) { 231 outb(_PNP_ADDRESS, PNP_STATUS); 232 for (j = 0; j < 100; j++) { 233 if ((inb((pnp_rd_port << 2) | 0x3)) & 0x1) 234 break; 235 DELAY(1); 236 } 237 if (j == 100) { 238 printf("PnP device failed to report resource data\n"); 239 return count; 240 } 241 outb(_PNP_ADDRESS, PNP_RESOURCE_DATA); 242 temp = inb((pnp_rd_port << 2) | 0x3); 243 if (buffer != NULL) 244 buffer[i] = temp; 245 count++; 246 } 247 return count; 248} 249 250#if 0 251/* 252 * write_pnp_parms initializes a logical device with the parms 253 * in d, and then activates the board if the last parameter is 1. 254 */ 255 256static int 257write_pnp_parms(struct pnp_cinfo *d, pnp_id *p, int ldn) 258{ 259 int i, empty = -1 ; 260 261 pnp_write (SET_LDN, ldn ); 262 i = pnp_read(SET_LDN) ; 263 if (i != ldn) { 264 printf("Warning: LDN %d does not exist\n", ldn); 265 } 266 for (i = 0; i < 8; i++) { 267 pnp_write(IO_CONFIG_BASE + i * 2, d->ic_port[i] >> 8 ); 268 pnp_write(IO_CONFIG_BASE + i * 2 + 1, d->ic_port[i] & 0xff ); 269 } 270 for (i = 0; i < 4; i++) { 271 pnp_write(MEM_CONFIG + i*8, (d->ic_mem[i].base >> 16) & 0xff ); 272 pnp_write(MEM_CONFIG + i*8+1, (d->ic_mem[i].base >> 8) & 0xff ); 273 pnp_write(MEM_CONFIG + i*8+2, d->ic_mem[i].control & 0xff ); 274 pnp_write(MEM_CONFIG + i*8+3, (d->ic_mem[i].range >> 16) & 0xff ); 275 pnp_write(MEM_CONFIG + i*8+4, (d->ic_mem[i].range >> 8) & 0xff ); 276 } 277 for (i = 0; i < 2; i++) { 278 pnp_write(IRQ_CONFIG + i*2 , d->irq[i] ); 279 pnp_write(IRQ_CONFIG + i*2 + 1, d->irq_type[i] ); 280 pnp_write(DRQ_CONFIG + i, d->drq[i] ); 281 } 282 /* 283 * store parameters read into the current kernel 284 * so manual editing next time is easier 285 */ 286 for (i = 0 ; i < MAX_PNP_LDN; i++) { 287 if (pnp_ldn_overrides[i].csn == d->csn && 288 pnp_ldn_overrides[i].ldn == ldn) { 289 d->flags = pnp_ldn_overrides[i].flags ; 290 pnp_ldn_overrides[i] = *d ; 291 break ; 292 } else if (pnp_ldn_overrides[i].csn < 1 || 293 pnp_ldn_overrides[i].csn == 255) 294 empty = i ; 295 } 296 if (i== MAX_PNP_LDN && empty != -1) 297 pnp_ldn_overrides[empty] = *d; 298 299 /* 300 * Here should really perform the range check, and 301 * return a failure if not successful. 302 */ 303 pnp_write (IO_RANGE_CHECK, 0); 304 DELAY(1000); /* XXX is it really necessary ? */ 305 pnp_write (ACTIVATE, d->enable ? 1 : 0); 306 DELAY(1000); /* XXX is it really necessary ? */ 307 return 1 ; 308} 309#endif 310 311/* 312 * This function is called after the bus has assigned resource 313 * locations for a logical device. 314 */ 315static void 316pnp_set_config(void *arg, struct isa_config *config, int enable) 317{ 318 int csn = ((struct pnp_set_config_arg *) arg)->csn; 319 int ldn = ((struct pnp_set_config_arg *) arg)->ldn; 320 int i; 321 322 /* 323 * First put all cards into Sleep state with the initiation 324 * key, then put our card into Config state. 325 */ 326 pnp_send_initiation_key(); 327 pnp_write(PNP_WAKE, csn); 328 329 /* 330 * Select our logical device so that we can program it. 331 */ 332 pnp_write(PNP_SET_LDN, ldn); 333 334 /* 335 * Constrain the number of resources we will try to program 336 */ 337 if (config->ic_nmem > ISA_PNP_NMEM) { 338 printf("too many ISA memory ranges (%d > %d)\n", config->ic_nmem, ISA_PNP_NMEM); 339 config->ic_nmem = ISA_PNP_NMEM; 340 } 341 if (config->ic_nport > ISA_PNP_NPORT) { 342 printf("too many ISA I/O ranges (%d > %d)\n", config->ic_nport, ISA_PNP_NPORT); 343 config->ic_nport = ISA_PNP_NPORT; 344 } 345 if (config->ic_nirq > ISA_PNP_NIRQ) { 346 printf("too many ISA IRQs (%d > %d)\n", config->ic_nirq, ISA_PNP_NIRQ); 347 config->ic_nirq = ISA_PNP_NIRQ; 348 } 349 if (config->ic_ndrq > ISA_PNP_NDRQ) { 350 printf("too many ISA DRQs (%d > %d)\n", config->ic_ndrq, ISA_PNP_NDRQ); 351 config->ic_ndrq = ISA_PNP_NDRQ; 352 } 353 354 /* 355 * Now program the resources. 356 */ 357 for (i = 0; i < config->ic_nmem; i++) { 358 u_int32_t start; 359 u_int32_t size; 360 361 /* XXX: should handle memory control register, 32 bit memory */ 362 if (config->ic_mem[i].ir_size == 0) { 363 pnp_write(PNP_MEM_BASE_HIGH(i), 0); 364 pnp_write(PNP_MEM_BASE_LOW(i), 0); 365 pnp_write(PNP_MEM_RANGE_HIGH(i), 0); 366 pnp_write(PNP_MEM_RANGE_LOW(i), 0); 367 } else { 368 start = config->ic_mem[i].ir_start; 369 size = config->ic_mem[i].ir_size; 370 if (start & 0xff) 371 panic("pnp_set_config: bogus memory assignment"); 372 pnp_write(PNP_MEM_BASE_HIGH(i), (start >> 16) & 0xff); 373 pnp_write(PNP_MEM_BASE_LOW(i), (start >> 8) & 0xff); 374 pnp_write(PNP_MEM_RANGE_HIGH(i), (size >> 16) & 0xff); 375 pnp_write(PNP_MEM_RANGE_LOW(i), (size >> 8) & 0xff); 376 } 377 } 378 for (; i < ISA_PNP_NMEM; i++) { 379 pnp_write(PNP_MEM_BASE_HIGH(i), 0); 380 pnp_write(PNP_MEM_BASE_LOW(i), 0); 381 pnp_write(PNP_MEM_RANGE_HIGH(i), 0); 382 pnp_write(PNP_MEM_RANGE_LOW(i), 0); 383 } 384 385 for (i = 0; i < config->ic_nport; i++) { 386 u_int32_t start; 387 388 if (config->ic_port[i].ir_size == 0) { 389 pnp_write(PNP_IO_BASE_HIGH(i), 0); 390 pnp_write(PNP_IO_BASE_LOW(i), 0); 391 } else { 392 start = config->ic_port[i].ir_start; 393 pnp_write(PNP_IO_BASE_HIGH(i), (start >> 8) & 0xff); 394 pnp_write(PNP_IO_BASE_LOW(i), (start >> 0) & 0xff); 395 } 396 } 397 for (; i < ISA_PNP_NPORT; i++) { 398 pnp_write(PNP_IO_BASE_HIGH(i), 0); 399 pnp_write(PNP_IO_BASE_LOW(i), 0); 400 } 401 402 for (i = 0; i < config->ic_nirq; i++) { 403 int irq; 404 405 /* XXX: interrupt type */ 406 if (config->ic_irqmask[i] == 0) { 407 pnp_write(PNP_IRQ_LEVEL(i), 0); 408 pnp_write(PNP_IRQ_TYPE(i), 2); 409 } else { 410 irq = ffs(config->ic_irqmask[i]) - 1; 411 pnp_write(PNP_IRQ_LEVEL(i), irq); 412 pnp_write(PNP_IRQ_TYPE(i), 2); /* XXX */ 413 } 414 } 415 for (; i < ISA_PNP_NIRQ; i++) { 416 /* 417 * IRQ 0 is not a valid interrupt selection and 418 * represents no interrupt selection. 419 */ 420 pnp_write(PNP_IRQ_LEVEL(i), 0); 421 pnp_write(PNP_IRQ_TYPE(i), 2); 422 } 423 424 for (i = 0; i < config->ic_ndrq; i++) { 425 int drq; 426 427 if (config->ic_drqmask[i] == 0) { 428 pnp_write(PNP_DMA_CHANNEL(i), 4); 429 } else { 430 drq = ffs(config->ic_drqmask[i]) - 1; 431 pnp_write(PNP_DMA_CHANNEL(i), drq); 432 } 433 } 434 for (; i < ISA_PNP_NDRQ; i++) { 435 /* 436 * DMA channel 4, the cascade channel is used to 437 * indicate no DMA channel is active. 438 */ 439 pnp_write(PNP_DMA_CHANNEL(i), 4); 440 } 441 442 pnp_write(PNP_ACTIVATE, enable ? 1 : 0); 443 444 /* 445 * Wake everyone up again, we are finished. 446 */ 447 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); 448} 449 450/* 451 * Process quirks for a logical device.. The card must be in Config state. 452 */ 453void 454pnp_check_quirks(u_int32_t vendor_id, u_int32_t logical_id, int ldn, struct isa_config *config) 455{ 456 struct pnp_quirk *qp; 457 458 for (qp = &pnp_quirks[0]; qp->vendor_id; qp++) { 459 if (qp->vendor_id == vendor_id 460 && (qp->logical_id == 0 461 || qp->logical_id == logical_id)) { 462 switch (qp->type) { 463 case PNP_QUIRK_WRITE_REG: 464 pnp_write(PNP_SET_LDN, ldn); 465 pnp_write(qp->arg1, qp->arg2); 466 break; 467 case PNP_QUIRK_EXTRA_IO: 468 if (config == NULL) 469 break; 470 if (qp->arg1 != 0) { 471 config->ic_nport++; 472 config->ic_port[config->ic_nport - 1] = config->ic_port[0]; 473 config->ic_port[config->ic_nport - 1].ir_start += qp->arg1; 474 config->ic_port[config->ic_nport - 1].ir_end += qp->arg1; 475 } 476 if (qp->arg2 != 0) { 477 config->ic_nport++; 478 config->ic_port[config->ic_nport - 1] = config->ic_port[0]; 479 config->ic_port[config->ic_nport - 1].ir_start += qp->arg2; 480 config->ic_port[config->ic_nport - 1].ir_end += qp->arg2; 481 } 482 break; 483 } 484 } 485 } 486} 487 488/* 489 * Scan Resource Data for Logical Devices. 490 * 491 * This function exits as soon as it gets an error reading *ANY* 492 * Resource Data or it reaches the end of Resource Data. In the first 493 * case the return value will be TRUE, FALSE otherwise. 494 */ 495static int 496pnp_create_devices(device_t parent, pnp_id *p, int csn, 497 u_char *resources, int len) 498{ 499 u_char tag, *resp, *resinfo, *startres = 0; 500 int large_len, scanning = len, retval = FALSE; 501 u_int32_t logical_id; 502 device_t dev = 0; 503 int ldn = 0; 504 struct pnp_set_config_arg *csnldn; 505 char buf[100]; 506 char *desc = 0; 507 508 resp = resources; 509 while (scanning > 0) { 510 tag = *resp++; 511 scanning--; 512 if (PNP_RES_TYPE(tag) != 0) { 513 /* Large resource */ 514 if (scanning < 2) { 515 scanning = 0; 516 continue; 517 } 518 large_len = resp[0] + (resp[1] << 8); 519 resp += 2; 520 521 if (scanning < large_len) { 522 scanning = 0; 523 continue; 524 } 525 resinfo = resp; 526 resp += large_len; 527 scanning -= large_len; 528 529 if (PNP_LRES_NUM(tag) == PNP_TAG_ID_ANSI) { 530 if (dev) { 531 /* 532 * This is an optional device 533 * indentifier string. Skipt it 534 * for now. 535 */ 536 continue; 537 } 538 /* else mandately card identifier string */ 539 if (large_len > sizeof(buf) - 1) 540 large_len = sizeof(buf) - 1; 541 bcopy(resinfo, buf, large_len); 542 543 /* 544 * Trim trailing spaces. 545 */ 546 while (buf[large_len-1] == ' ') 547 large_len--; 548 buf[large_len] = '\0'; 549 desc = buf; 550 continue; 551 } 552 553 continue; 554 } 555 556 /* Small resource */ 557 if (scanning < PNP_SRES_LEN(tag)) { 558 scanning = 0; 559 continue; 560 } 561 resinfo = resp; 562 resp += PNP_SRES_LEN(tag); 563 scanning -= PNP_SRES_LEN(tag);; 564 565 switch (PNP_SRES_NUM(tag)) { 566 case PNP_TAG_LOGICAL_DEVICE: 567 /* 568 * Parse the resources for the previous 569 * logical device (if any). 570 */ 571 if (startres) { 572 pnp_parse_resources(dev, startres, 573 resinfo - startres - 1, 574 ldn); 575 dev = 0; 576 startres = 0; 577 } 578 579 /* 580 * A new logical device. Scan for end of 581 * resources. 582 */ 583 bcopy(resinfo, &logical_id, 4); 584 pnp_check_quirks(p->vendor_id, logical_id, ldn, NULL); 585 dev = BUS_ADD_CHILD(parent, ISA_ORDER_PNP, NULL, -1); 586 if (desc) 587 device_set_desc_copy(dev, desc); 588 else 589 device_set_desc_copy(dev, 590 pnp_eisaformat(logical_id)); 591 isa_set_vendorid(dev, p->vendor_id); 592 isa_set_serial(dev, p->serial); 593 isa_set_logicalid(dev, logical_id); 594 isa_set_configattr(dev, 595 ISACFGATTR_CANDISABLE | 596 ISACFGATTR_DYNAMIC); 597 csnldn = malloc(sizeof *csnldn, M_DEVBUF, M_NOWAIT); 598 if (!csnldn) { 599 device_printf(parent, 600 "out of memory\n"); 601 scanning = 0; 602 break; 603 } 604 csnldn->csn = csn; 605 csnldn->ldn = ldn; 606 ISA_SET_CONFIG_CALLBACK(parent, dev, 607 pnp_set_config, csnldn); 608 ldn++; 609 startres = resp; 610 break; 611 612 case PNP_TAG_END: 613 if (!startres) { 614 device_printf(parent, 615 "malformed resources\n"); 616 scanning = 0; 617 break; 618 } 619 pnp_parse_resources(dev, startres, 620 resinfo - startres - 1, ldn); 621 dev = 0; 622 startres = 0; 623 scanning = 0; 624 break; 625 626 default: 627 /* Skip this resource */ 628 break; 629 } 630 } 631 632 return retval; 633} 634 635/* 636 * Read 'amount' bytes of resources from the card, allocating memory 637 * as needed. If a buffer is already available, it should be passed in 638 * '*resourcesp' and its length in '*spacep'. The number of resource 639 * bytes already in the buffer should be passed in '*lenp'. The memory 640 * allocated will be returned in '*resourcesp' with its size and the 641 * number of bytes of resources in '*spacep' and '*lenp' respectively. 642 * 643 * XXX: Multiple problems here, we forget to free() stuff in one 644 * XXX: error return, and in another case we free (*resourcesp) but 645 * XXX: don't tell the caller. 646 */ 647static int 648pnp_read_bytes(int amount, u_char **resourcesp, int *spacep, int *lenp) 649{ 650 u_char *resources = *resourcesp; 651 u_char *newres; 652 int space = *spacep; 653 int len = *lenp; 654 655 if (space == 0) { 656 space = 1024; 657 resources = malloc(space, M_TEMP, M_NOWAIT); 658 if (!resources) 659 return ENOMEM; 660 } 661 662 if (len + amount > space) { 663 int extra = 1024; 664 while (len + amount > space + extra) 665 extra += 1024; 666 newres = malloc(space + extra, M_TEMP, M_NOWAIT); 667 if (!newres) { 668 /* XXX: free resources */ 669 return ENOMEM; 670 } 671 bcopy(resources, newres, len); 672 free(resources, M_TEMP); 673 resources = newres; 674 space += extra; 675 } 676 677 if (pnp_get_resource_info(resources + len, amount) != amount) 678 return EINVAL; 679 len += amount; 680 681 *resourcesp = resources; 682 *spacep = space; 683 *lenp = len; 684 685 return 0; 686} 687 688/* 689 * Read all resources from the card, allocating memory as needed. If a 690 * buffer is already available, it should be passed in '*resourcesp' 691 * and its length in '*spacep'. The memory allocated will be returned 692 * in '*resourcesp' with its size and the number of bytes of resources 693 * in '*spacep' and '*lenp' respectively. 694 */ 695static int 696pnp_read_resources(u_char **resourcesp, int *spacep, int *lenp) 697{ 698 u_char *resources = *resourcesp; 699 int space = *spacep; 700 int len = 0; 701 int error, done; 702 u_char tag; 703 704 error = 0; 705 done = 0; 706 while (!done) { 707 error = pnp_read_bytes(1, &resources, &space, &len); 708 if (error) 709 goto out; 710 tag = resources[len-1]; 711 if (PNP_RES_TYPE(tag) == 0) { 712 /* 713 * Small resource, read contents. 714 */ 715 error = pnp_read_bytes(PNP_SRES_LEN(tag), 716 &resources, &space, &len); 717 if (error) 718 goto out; 719 if (PNP_SRES_NUM(tag) == PNP_TAG_END) 720 done = 1; 721 } else { 722 /* 723 * Large resource, read length and contents. 724 */ 725 error = pnp_read_bytes(2, &resources, &space, &len); 726 if (error) 727 goto out; 728 error = pnp_read_bytes(resources[len-2] 729 + (resources[len-1] << 8), 730 &resources, &space, &len); 731 if (error) 732 goto out; 733 } 734 } 735 736 out: 737 *resourcesp = resources; 738 *spacep = space; 739 *lenp = len; 740 return error; 741} 742 743/* 744 * Run the isolation protocol. Use pnp_rd_port as the READ_DATA port 745 * value (caller should try multiple READ_DATA locations before giving 746 * up). Upon exiting, all cards are aware that they should use 747 * pnp_rd_port as the READ_DATA port. 748 * 749 * In the first pass, a csn is assigned to each board and pnp_id's 750 * are saved to an array, pnp_devices. In the second pass, each 751 * card is woken up and the device configuration is called. 752 */ 753static int 754pnp_isolation_protocol(device_t parent) 755{ 756 int csn; 757 pnp_id id; 758 int found = 0, len; 759 u_char *resources = 0; 760 int space = 0; 761 int error; 762#ifdef PC98 763 int n, necpnp; 764 u_char buffer[10]; 765#endif 766 767 /* 768 * Put all cards into the Sleep state so that we can clear 769 * their CSNs. 770 */ 771 pnp_send_initiation_key(); 772 773 /* 774 * Clear the CSN for all cards. 775 */ 776 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_RESET_CSN); 777 778 /* 779 * Move all cards to the Isolation state. 780 */ 781 pnp_write(PNP_WAKE, 0); 782 783 /* 784 * Tell them where the read point is going to be this time. 785 */ 786 pnp_write(PNP_SET_RD_DATA, pnp_rd_port); 787 788 for (csn = 1; csn < PNP_MAX_CARDS; csn++) { 789 /* 790 * Start the serial isolation protocol. 791 */ 792 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); 793 DELAY(1000); /* Delay 1 msec */ 794 795 if (pnp_get_serial(&id)) { 796 /* 797 * We have read the id from a card 798 * successfully. The card which won the 799 * isolation protocol will be in Isolation 800 * mode and all others will be in Sleep. 801 * Program the CSN of the isolated card 802 * (taking it to Config state) and read its 803 * resources, creating devices as we find 804 * logical devices on the card. 805 */ 806 pnp_write(PNP_SET_CSN, csn); 807#ifdef PC98 808 if (bootverbose) 809 printf("PnP Vendor ID = %x\n", id.vendor_id); 810 /* Check for NEC PnP (9 bytes serial). */ 811 for (n = necpnp = 0; necids[n].vendor_id; n++) { 812 if (id.vendor_id == necids[n].vendor_id) { 813 necpnp = 1; 814 break; 815 } 816 } 817 if (necpnp) { 818 if (bootverbose) 819 printf("It seems to NEC-PnP card (%s).\n", 820 pnp_eisaformat(id.vendor_id)); 821 /* Read dummy 9 bytes serial area. */ 822 pnp_get_resource_info(buffer, 9); 823 } else { 824 if (bootverbose) 825 printf("It seems to Normal-ISA-PnP card (%s).\n", 826 pnp_eisaformat(id.vendor_id)); 827 } 828 if (bootverbose) 829 printf("Reading PnP configuration for %s.\n", 830 pnp_eisaformat(id.vendor_id)); 831#endif 832 error = pnp_read_resources(&resources, 833 &space, 834 &len); 835 if (error) 836 break; 837 pnp_create_devices(parent, &id, csn, 838 resources, len); 839 found++; 840 } else 841 break; 842 843 /* 844 * Put this card back to the Sleep state and 845 * simultaneously move all cards which don't have a 846 * CSN yet to Isolation state. 847 */ 848 pnp_write(PNP_WAKE, 0); 849 } 850 851 /* 852 * Unless we have chosen the wrong read port, all cards will 853 * be in Sleep state. Put them back into WaitForKey for 854 * now. Their resources will be programmed later. 855 */ 856 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); 857 858 /* 859 * Cleanup. 860 */ 861 if (resources) 862 free(resources, M_TEMP); 863 864 return found; 865} 866 867 868/* 869 * pnp_identify() 870 * 871 * autoconfiguration of pnp devices. This routine just runs the 872 * isolation protocol over several ports, until one is successful. 873 * 874 * may be called more than once ? 875 * 876 */ 877 878static void 879pnp_identify(driver_t *driver, device_t parent) 880{ 881 int num_pnp_devs; 882 883#if 0 884 if (pnp_ldn_overrides[0].csn == 0) { 885 if (bootverbose) 886 printf("Initializing PnP override table\n"); 887 bzero (pnp_ldn_overrides, sizeof(pnp_ldn_overrides)); 888 pnp_ldn_overrides[0].csn = 255 ; 889 } 890#endif 891 892 /* Try various READ_DATA ports from 0x203-0x3ff */ 893 for (pnp_rd_port = 0x80; (pnp_rd_port < 0xff); pnp_rd_port += 0x10) { 894 if (bootverbose) 895 printf("Trying Read_Port at %x\n", (pnp_rd_port << 2) | 0x3); 896 897 num_pnp_devs = pnp_isolation_protocol(parent); 898 if (num_pnp_devs) 899 break; 900 } 901} 902 903static device_method_t pnp_methods[] = { 904 /* Device interface */ 905 DEVMETHOD(device_identify, pnp_identify), 906 907 { 0, 0 } 908}; 909 910static driver_t pnp_driver = { 911 "pnp", 912 pnp_methods, 913 1, /* no softc */ 914}; 915 916static devclass_t pnp_devclass; 917 918DRIVER_MODULE(pnp, isa, pnp_driver, pnp_devclass, 0, 0); 919