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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 * $FreeBSD: releng/5.1/sys/isa/pnp.c 105226 2002-10-16 10:40:43Z phk $ 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 41 typedef struct _pnp_id { 42 u_int32_t vendor_id; 43 u_int32_t serial; 44 u_char checksum; 45 } pnp_id; 46 47 struct pnp_set_config_arg { 48 int csn; /* Card number to configure */ 49 int ldn; /* Logical device on card */ 50 }; 51 52 struct 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 62 struct 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 { 0xc5008c0e /* SB64(CTL00c5) */, 0x22008c0e, 87 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 88 { 0xe4008c0e /* SB64(CTL00e4) */, 0x22008c0e, 89 PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, 90 91 { 0 } 92 }; 93 94 #ifdef PC98 95 /* Some NEC PnP cards have 9 bytes serial code. */ 96 static pnp_id necids[] = { 97 {0x4180a3b8, 0xffffffff, 0x00}, /* PC-9801CB-B04 (NEC8041) */ 98 {0x5181a3b8, 0xffffffff, 0x46}, /* PC-9821CB2-B04(NEC8151) */ 99 {0x5182a3b8, 0xffffffff, 0xb8}, /* PC-9801-XX (NEC8251) */ 100 {0x9181a3b8, 0xffffffff, 0x00}, /* PC-9801-120 (NEC8191) */ 101 {0, 0, 0} 102 }; 103 #endif 104 105 #if 0 106 /* 107 * these entries are initialized using the autoconfig menu 108 * The struct is invalid (and must be initialized) if the first 109 * CSN is zero. The init code fills invalid entries with CSN 255 110 * which is not a supported value. 111 */ 112 113 struct pnp_cinfo pnp_ldn_overrides[MAX_PNP_LDN] = { 114 { 0 } 115 }; 116 #endif 117 118 /* The READ_DATA port that we are using currently */ 119 static int pnp_rd_port; 120 121 static void pnp_send_initiation_key(void); 122 static int pnp_get_serial(pnp_id *p); 123 static int pnp_isolation_protocol(device_t parent); 124 125 char * 126 pnp_eisaformat(u_int32_t id) 127 { 128 u_int8_t *data = (u_int8_t *) &id; 129 static char idbuf[8]; 130 const char hextoascii[] = "0123456789abcdef"; 131 132 idbuf[0] = '@' + ((data[0] & 0x7c) >> 2); 133 idbuf[1] = '@' + (((data[0] & 0x3) << 3) + ((data[1] & 0xe0) >> 5)); 134 idbuf[2] = '@' + (data[1] & 0x1f); 135 idbuf[3] = hextoascii[(data[2] >> 4)]; 136 idbuf[4] = hextoascii[(data[2] & 0xf)]; 137 idbuf[5] = hextoascii[(data[3] >> 4)]; 138 idbuf[6] = hextoascii[(data[3] & 0xf)]; 139 idbuf[7] = 0; 140 return(idbuf); 141 } 142 143 static void 144 pnp_write(int d, u_char r) 145 { 146 outb (_PNP_ADDRESS, d); 147 outb (_PNP_WRITE_DATA, r); 148 } 149 150 #if 0 151 152 static u_char 153 pnp_read(int d) 154 { 155 outb (_PNP_ADDRESS, d); 156 return (inb(3 | (pnp_rd_port <<2))); 157 } 158 159 #endif 160 161 /* 162 * Send Initiation LFSR as described in "Plug and Play ISA Specification", 163 * Intel May 94. 164 */ 165 static void 166 pnp_send_initiation_key() 167 { 168 int cur, i; 169 170 /* Reset the LSFR */ 171 outb(_PNP_ADDRESS, 0); 172 outb(_PNP_ADDRESS, 0); /* yes, we do need it twice! */ 173 174 cur = 0x6a; 175 outb(_PNP_ADDRESS, cur); 176 177 for (i = 1; i < 32; i++) { 178 cur = (cur >> 1) | (((cur ^ (cur >> 1)) << 7) & 0xff); 179 outb(_PNP_ADDRESS, cur); 180 } 181 } 182 183 184 /* 185 * Get the device's serial number. Returns 1 if the serial is valid. 186 */ 187 static int 188 pnp_get_serial(pnp_id *p) 189 { 190 int i, bit, valid = 0, sum = 0x6a; 191 u_char *data = (u_char *)p; 192 193 bzero(data, sizeof(char) * 9); 194 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); 195 for (i = 0; i < 72; i++) { 196 bit = inb((pnp_rd_port << 2) | 0x3) == 0x55; 197 DELAY(250); /* Delay 250 usec */ 198 199 /* Can't Short Circuit the next evaluation, so 'and' is last */ 200 bit = (inb((pnp_rd_port << 2) | 0x3) == 0xaa) && bit; 201 DELAY(250); /* Delay 250 usec */ 202 203 valid = valid || bit; 204 205 if (i < 64) 206 sum = (sum >> 1) | 207 (((sum ^ (sum >> 1) ^ bit) << 7) & 0xff); 208 209 data[i / 8] = (data[i / 8] >> 1) | (bit ? 0x80 : 0); 210 } 211 212 valid = valid && (data[8] == sum); 213 214 return valid; 215 } 216 217 /* 218 * Fill's the buffer with resource info from the device. 219 * Returns the number of characters read. 220 */ 221 static int 222 pnp_get_resource_info(u_char *buffer, int len) 223 { 224 int i, j, count; 225 u_char temp; 226 227 count = 0; 228 for (i = 0; i < len; i++) { 229 outb(_PNP_ADDRESS, PNP_STATUS); 230 for (j = 0; j < 100; j++) { 231 if ((inb((pnp_rd_port << 2) | 0x3)) & 0x1) 232 break; 233 DELAY(1); 234 } 235 if (j == 100) { 236 printf("PnP device failed to report resource data\n"); 237 return count; 238 } 239 outb(_PNP_ADDRESS, PNP_RESOURCE_DATA); 240 temp = inb((pnp_rd_port << 2) | 0x3); 241 if (buffer != NULL) 242 buffer[i] = temp; 243 count++; 244 } 245 return count; 246 } 247 248 #if 0 249 /* 250 * write_pnp_parms initializes a logical device with the parms 251 * in d, and then activates the board if the last parameter is 1. 252 */ 253 254 static int 255 write_pnp_parms(struct pnp_cinfo *d, pnp_id *p, int ldn) 256 { 257 int i, empty = -1 ; 258 259 pnp_write (SET_LDN, ldn ); 260 i = pnp_read(SET_LDN) ; 261 if (i != ldn) { 262 printf("Warning: LDN %d does not exist\n", ldn); 263 } 264 for (i = 0; i < 8; i++) { 265 pnp_write(IO_CONFIG_BASE + i * 2, d->ic_port[i] >> 8 ); 266 pnp_write(IO_CONFIG_BASE + i * 2 + 1, d->ic_port[i] & 0xff ); 267 } 268 for (i = 0; i < 4; i++) { 269 pnp_write(MEM_CONFIG + i*8, (d->ic_mem[i].base >> 16) & 0xff ); 270 pnp_write(MEM_CONFIG + i*8+1, (d->ic_mem[i].base >> 8) & 0xff ); 271 pnp_write(MEM_CONFIG + i*8+2, d->ic_mem[i].control & 0xff ); 272 pnp_write(MEM_CONFIG + i*8+3, (d->ic_mem[i].range >> 16) & 0xff ); 273 pnp_write(MEM_CONFIG + i*8+4, (d->ic_mem[i].range >> 8) & 0xff ); 274 } 275 for (i = 0; i < 2; i++) { 276 pnp_write(IRQ_CONFIG + i*2 , d->irq[i] ); 277 pnp_write(IRQ_CONFIG + i*2 + 1, d->irq_type[i] ); 278 pnp_write(DRQ_CONFIG + i, d->drq[i] ); 279 } 280 /* 281 * store parameters read into the current kernel 282 * so manual editing next time is easier 283 */ 284 for (i = 0 ; i < MAX_PNP_LDN; i++) { 285 if (pnp_ldn_overrides[i].csn == d->csn && 286 pnp_ldn_overrides[i].ldn == ldn) { 287 d->flags = pnp_ldn_overrides[i].flags ; 288 pnp_ldn_overrides[i] = *d ; 289 break ; 290 } else if (pnp_ldn_overrides[i].csn < 1 || 291 pnp_ldn_overrides[i].csn == 255) 292 empty = i ; 293 } 294 if (i== MAX_PNP_LDN && empty != -1) 295 pnp_ldn_overrides[empty] = *d; 296 297 /* 298 * Here should really perform the range check, and 299 * return a failure if not successful. 300 */ 301 pnp_write (IO_RANGE_CHECK, 0); 302 DELAY(1000); /* XXX is it really necessary ? */ 303 pnp_write (ACTIVATE, d->enable ? 1 : 0); 304 DELAY(1000); /* XXX is it really necessary ? */ 305 return 1 ; 306 } 307 #endif 308 309 /* 310 * This function is called after the bus has assigned resource 311 * locations for a logical device. 312 */ 313 static void 314 pnp_set_config(void *arg, struct isa_config *config, int enable) 315 { 316 int csn = ((struct pnp_set_config_arg *) arg)->csn; 317 int ldn = ((struct pnp_set_config_arg *) arg)->ldn; 318 int i; 319 320 /* 321 * First put all cards into Sleep state with the initiation 322 * key, then put our card into Config state. 323 */ 324 pnp_send_initiation_key(); 325 pnp_write(PNP_WAKE, csn); 326 327 /* 328 * Select our logical device so that we can program it. 329 */ 330 pnp_write(PNP_SET_LDN, ldn); 331 332 /* 333 * Constrain the number of resources we will try to program 334 */ 335 if (config->ic_nmem > ISA_PNP_NMEM) { 336 printf("too many ISA memory ranges (%d > %d)\n", config->ic_nmem, ISA_PNP_NMEM); 337 config->ic_nmem = ISA_PNP_NMEM; 338 } 339 if (config->ic_nport > ISA_PNP_NPORT) { 340 printf("too many ISA I/O ranges (%d > %d)\n", config->ic_nport, ISA_PNP_NPORT); 341 config->ic_nport = ISA_PNP_NPORT; 342 } 343 if (config->ic_nirq > ISA_PNP_NIRQ) { 344 printf("too many ISA IRQs (%d > %d)\n", config->ic_nirq, ISA_PNP_NIRQ); 345 config->ic_nirq = ISA_PNP_NIRQ; 346 } 347 if (config->ic_ndrq > ISA_PNP_NDRQ) { 348 printf("too many ISA DRQs (%d > %d)\n", config->ic_ndrq, ISA_PNP_NDRQ); 349 config->ic_ndrq = ISA_PNP_NDRQ; 350 } 351 352 /* 353 * Now program the resources. 354 */ 355 for (i = 0; i < config->ic_nmem; i++) { 356 u_int32_t start; 357 u_int32_t size; 358 359 /* XXX: should handle memory control register, 32 bit memory */ 360 if (config->ic_mem[i].ir_size == 0) { 361 pnp_write(PNP_MEM_BASE_HIGH(i), 0); 362 pnp_write(PNP_MEM_BASE_LOW(i), 0); 363 pnp_write(PNP_MEM_RANGE_HIGH(i), 0); 364 pnp_write(PNP_MEM_RANGE_LOW(i), 0); 365 } else { 366 start = config->ic_mem[i].ir_start; 367 size = config->ic_mem[i].ir_size; 368 if (start & 0xff) 369 panic("pnp_set_config: bogus memory assignment"); 370 pnp_write(PNP_MEM_BASE_HIGH(i), (start >> 16) & 0xff); 371 pnp_write(PNP_MEM_BASE_LOW(i), (start >> 8) & 0xff); 372 pnp_write(PNP_MEM_RANGE_HIGH(i), (size >> 16) & 0xff); 373 pnp_write(PNP_MEM_RANGE_LOW(i), (size >> 8) & 0xff); 374 } 375 } 376 for (; i < ISA_PNP_NMEM; i++) { 377 pnp_write(PNP_MEM_BASE_HIGH(i), 0); 378 pnp_write(PNP_MEM_BASE_LOW(i), 0); 379 pnp_write(PNP_MEM_RANGE_HIGH(i), 0); 380 pnp_write(PNP_MEM_RANGE_LOW(i), 0); 381 } 382 383 for (i = 0; i < config->ic_nport; i++) { 384 u_int32_t start; 385 386 if (config->ic_port[i].ir_size == 0) { 387 pnp_write(PNP_IO_BASE_HIGH(i), 0); 388 pnp_write(PNP_IO_BASE_LOW(i), 0); 389 } else { 390 start = config->ic_port[i].ir_start; 391 pnp_write(PNP_IO_BASE_HIGH(i), (start >> 8) & 0xff); 392 pnp_write(PNP_IO_BASE_LOW(i), (start >> 0) & 0xff); 393 } 394 } 395 for (; i < ISA_PNP_NPORT; i++) { 396 pnp_write(PNP_IO_BASE_HIGH(i), 0); 397 pnp_write(PNP_IO_BASE_LOW(i), 0); 398 } 399 400 for (i = 0; i < config->ic_nirq; i++) { 401 int irq; 402 403 /* XXX: interrupt type */ 404 if (config->ic_irqmask[i] == 0) { 405 pnp_write(PNP_IRQ_LEVEL(i), 0); 406 pnp_write(PNP_IRQ_TYPE(i), 2); 407 } else { 408 irq = ffs(config->ic_irqmask[i]) - 1; 409 pnp_write(PNP_IRQ_LEVEL(i), irq); 410 pnp_write(PNP_IRQ_TYPE(i), 2); /* XXX */ 411 } 412 } 413 for (; i < ISA_PNP_NIRQ; i++) { 414 /* 415 * IRQ 0 is not a valid interrupt selection and 416 * represents no interrupt selection. 417 */ 418 pnp_write(PNP_IRQ_LEVEL(i), 0); 419 pnp_write(PNP_IRQ_TYPE(i), 2); 420 } 421 422 for (i = 0; i < config->ic_ndrq; i++) { 423 int drq; 424 425 if (config->ic_drqmask[i] == 0) { 426 pnp_write(PNP_DMA_CHANNEL(i), 4); 427 } else { 428 drq = ffs(config->ic_drqmask[i]) - 1; 429 pnp_write(PNP_DMA_CHANNEL(i), drq); 430 } 431 } 432 for (; i < ISA_PNP_NDRQ; i++) { 433 /* 434 * DMA channel 4, the cascade channel is used to 435 * indicate no DMA channel is active. 436 */ 437 pnp_write(PNP_DMA_CHANNEL(i), 4); 438 } 439 440 pnp_write(PNP_ACTIVATE, enable ? 1 : 0); 441 442 /* 443 * Wake everyone up again, we are finished. 444 */ 445 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); 446 } 447 448 /* 449 * Process quirks for a logical device.. The card must be in Config state. 450 */ 451 void 452 pnp_check_quirks(u_int32_t vendor_id, u_int32_t logical_id, int ldn, struct isa_config *config) 453 { 454 struct pnp_quirk *qp; 455 456 for (qp = &pnp_quirks[0]; qp->vendor_id; qp++) { 457 if (qp->vendor_id == vendor_id 458 && (qp->logical_id == 0 459 || qp->logical_id == logical_id)) { 460 switch (qp->type) { 461 case PNP_QUIRK_WRITE_REG: 462 pnp_write(PNP_SET_LDN, ldn); 463 pnp_write(qp->arg1, qp->arg2); 464 break; 465 case PNP_QUIRK_EXTRA_IO: 466 if (config == NULL) 467 break; 468 if (qp->arg1 != 0) { 469 config->ic_nport++; 470 config->ic_port[config->ic_nport - 1] = config->ic_port[0]; 471 config->ic_port[config->ic_nport - 1].ir_start += qp->arg1; 472 config->ic_port[config->ic_nport - 1].ir_end += qp->arg1; 473 } 474 if (qp->arg2 != 0) { 475 config->ic_nport++; 476 config->ic_port[config->ic_nport - 1] = config->ic_port[0]; 477 config->ic_port[config->ic_nport - 1].ir_start += qp->arg2; 478 config->ic_port[config->ic_nport - 1].ir_end += qp->arg2; 479 } 480 break; 481 } 482 } 483 } 484 } 485 486 /* 487 * Scan Resource Data for Logical Devices. 488 * 489 * This function exits as soon as it gets an error reading *ANY* 490 * Resource Data or it reaches the end of Resource Data. In the first 491 * case the return value will be TRUE, FALSE otherwise. 492 */ 493 static int 494 pnp_create_devices(device_t parent, pnp_id *p, int csn, 495 u_char *resources, int len) 496 { 497 u_char tag, *resp, *resinfo, *startres = 0; 498 int large_len, scanning = len, retval = FALSE; 499 u_int32_t logical_id; 500 u_int32_t compat_id; 501 device_t dev = 0; 502 int ldn = 0; 503 struct pnp_set_config_arg *csnldn; 504 char buf[100]; 505 char *desc = 0; 506 507 resp = resources; 508 while (scanning > 0) { 509 tag = *resp++; 510 scanning--; 511 if (PNP_RES_TYPE(tag) != 0) { 512 /* Large resource */ 513 if (scanning < 2) { 514 scanning = 0; 515 continue; 516 } 517 large_len = resp[0] + (resp[1] << 8); 518 resp += 2; 519 520 if (scanning < large_len) { 521 scanning = 0; 522 continue; 523 } 524 resinfo = resp; 525 resp += large_len; 526 scanning -= large_len; 527 528 if (PNP_LRES_NUM(tag) == PNP_TAG_ID_ANSI) { 529 if (dev) { 530 /* 531 * This is an optional device 532 * indentifier string. Skipt it 533 * for now. 534 */ 535 continue; 536 } 537 /* else mandately card identifier string */ 538 if (large_len > sizeof(buf) - 1) 539 large_len = sizeof(buf) - 1; 540 bcopy(resinfo, buf, large_len); 541 542 /* 543 * Trim trailing spaces. 544 */ 545 while (buf[large_len-1] == ' ') 546 large_len--; 547 buf[large_len] = '\0'; 548 desc = buf; 549 continue; 550 } 551 552 continue; 553 } 554 555 /* Small resource */ 556 if (scanning < PNP_SRES_LEN(tag)) { 557 scanning = 0; 558 continue; 559 } 560 resinfo = resp; 561 resp += PNP_SRES_LEN(tag); 562 scanning -= PNP_SRES_LEN(tag);; 563 564 switch (PNP_SRES_NUM(tag)) { 565 case PNP_TAG_LOGICAL_DEVICE: 566 /* 567 * Parse the resources for the previous 568 * logical device (if any). 569 */ 570 if (startres) { 571 pnp_parse_resources(dev, startres, 572 resinfo - startres - 1, 573 ldn); 574 dev = 0; 575 startres = 0; 576 } 577 578 /* 579 * A new logical device. Scan for end of 580 * resources. 581 */ 582 bcopy(resinfo, &logical_id, 4); 583 pnp_check_quirks(p->vendor_id, logical_id, ldn, NULL); 584 compat_id = 0; 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 */ 647 static int 648 pnp_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 return ENOMEM; 669 bcopy(resources, newres, len); 670 free(resources, M_TEMP); 671 resources = newres; 672 space += extra; 673 } 674 675 if (pnp_get_resource_info(resources + len, amount) != amount) 676 return EINVAL; 677 len += amount; 678 679 *resourcesp = resources; 680 *spacep = space; 681 *lenp = len; 682 683 return 0; 684 } 685 686 /* 687 * Read all resources from the card, allocating memory as needed. If a 688 * buffer is already available, it should be passed in '*resourcesp' 689 * and its length in '*spacep'. The memory allocated will be returned 690 * in '*resourcesp' with its size and the number of bytes of resources 691 * in '*spacep' and '*lenp' respectively. 692 */ 693 static int 694 pnp_read_resources(u_char **resourcesp, int *spacep, int *lenp) 695 { 696 u_char *resources = *resourcesp; 697 int space = *spacep; 698 int len = 0; 699 int error, done; 700 u_char tag; 701 702 error = 0; 703 done = 0; 704 while (!done) { 705 error = pnp_read_bytes(1, &resources, &space, &len); 706 if (error) 707 goto out; 708 tag = resources[len-1]; 709 if (PNP_RES_TYPE(tag) == 0) { 710 /* 711 * Small resource, read contents. 712 */ 713 error = pnp_read_bytes(PNP_SRES_LEN(tag), 714 &resources, &space, &len); 715 if (error) 716 goto out; 717 if (PNP_SRES_NUM(tag) == PNP_TAG_END) 718 done = 1; 719 } else { 720 /* 721 * Large resource, read length and contents. 722 */ 723 error = pnp_read_bytes(2, &resources, &space, &len); 724 if (error) 725 goto out; 726 error = pnp_read_bytes(resources[len-2] 727 + (resources[len-1] << 8), 728 &resources, &space, &len); 729 if (error) 730 goto out; 731 } 732 } 733 734 out: 735 *resourcesp = resources; 736 *spacep = space; 737 *lenp = len; 738 return error; 739 } 740 741 /* 742 * Run the isolation protocol. Use pnp_rd_port as the READ_DATA port 743 * value (caller should try multiple READ_DATA locations before giving 744 * up). Upon exiting, all cards are aware that they should use 745 * pnp_rd_port as the READ_DATA port. 746 * 747 * In the first pass, a csn is assigned to each board and pnp_id's 748 * are saved to an array, pnp_devices. In the second pass, each 749 * card is woken up and the device configuration is called. 750 */ 751 static int 752 pnp_isolation_protocol(device_t parent) 753 { 754 int csn; 755 pnp_id id; 756 int found = 0, len; 757 u_char *resources = 0; 758 int space = 0; 759 int error; 760 #ifdef PC98 761 int n, necpnp; 762 u_char buffer[10]; 763 #endif 764 765 /* 766 * Put all cards into the Sleep state so that we can clear 767 * their CSNs. 768 */ 769 pnp_send_initiation_key(); 770 771 /* 772 * Clear the CSN for all cards. 773 */ 774 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_RESET_CSN); 775 776 /* 777 * Move all cards to the Isolation state. 778 */ 779 pnp_write(PNP_WAKE, 0); 780 781 /* 782 * Tell them where the read point is going to be this time. 783 */ 784 pnp_write(PNP_SET_RD_DATA, pnp_rd_port); 785 786 for (csn = 1; csn < PNP_MAX_CARDS; csn++) { 787 /* 788 * Start the serial isolation protocol. 789 */ 790 outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); 791 DELAY(1000); /* Delay 1 msec */ 792 793 if (pnp_get_serial(&id)) { 794 /* 795 * We have read the id from a card 796 * successfully. The card which won the 797 * isolation protocol will be in Isolation 798 * mode and all others will be in Sleep. 799 * Program the CSN of the isolated card 800 * (taking it to Config state) and read its 801 * resources, creating devices as we find 802 * logical devices on the card. 803 */ 804 pnp_write(PNP_SET_CSN, csn); 805 #ifdef PC98 806 if (bootverbose) 807 printf("PnP Vendor ID = %x\n", id.vendor_id); 808 /* Check for NEC PnP (9 bytes serial). */ 809 for (n = necpnp = 0; necids[n].vendor_id; n++) { 810 if (id.vendor_id == necids[n].vendor_id) { 811 necpnp = 1; 812 break; 813 } 814 } 815 if (necpnp) { 816 if (bootverbose) 817 printf("It seems to NEC-PnP card (%s).\n", 818 pnp_eisaformat(id.vendor_id)); 819 /* Read dummy 9 bytes serial area. */ 820 pnp_get_resource_info(buffer, 9); 821 } else { 822 if (bootverbose) 823 printf("It seems to Normal-ISA-PnP card (%s).\n", 824 pnp_eisaformat(id.vendor_id)); 825 } 826 if (bootverbose) 827 printf("Reading PnP configuration for %s.\n", 828 pnp_eisaformat(id.vendor_id)); 829 #endif 830 error = pnp_read_resources(&resources, 831 &space, 832 &len); 833 if (error) 834 break; 835 pnp_create_devices(parent, &id, csn, 836 resources, len); 837 found++; 838 } else 839 break; 840 841 /* 842 * Put this card back to the Sleep state and 843 * simultaneously move all cards which don't have a 844 * CSN yet to Isolation state. 845 */ 846 pnp_write(PNP_WAKE, 0); 847 } 848 849 /* 850 * Unless we have chosen the wrong read port, all cards will 851 * be in Sleep state. Put them back into WaitForKey for 852 * now. Their resources will be programmed later. 853 */ 854 pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); 855 856 /* 857 * Cleanup. 858 */ 859 if (resources) 860 free(resources, M_TEMP); 861 862 return found; 863 } 864 865 866 /* 867 * pnp_identify() 868 * 869 * autoconfiguration of pnp devices. This routine just runs the 870 * isolation protocol over several ports, until one is successful. 871 * 872 * may be called more than once ? 873 * 874 */ 875 876 static void 877 pnp_identify(driver_t *driver, device_t parent) 878 { 879 int num_pnp_devs; 880 881 #if 0 882 if (pnp_ldn_overrides[0].csn == 0) { 883 if (bootverbose) 884 printf("Initializing PnP override table\n"); 885 bzero (pnp_ldn_overrides, sizeof(pnp_ldn_overrides)); 886 pnp_ldn_overrides[0].csn = 255 ; 887 } 888 #endif 889 890 /* Try various READ_DATA ports from 0x203-0x3ff */ 891 for (pnp_rd_port = 0x80; (pnp_rd_port < 0xff); pnp_rd_port += 0x10) { 892 if (bootverbose) 893 printf("Trying Read_Port at %x\n", (pnp_rd_port << 2) | 0x3); 894 895 num_pnp_devs = pnp_isolation_protocol(parent); 896 if (num_pnp_devs) 897 break; 898 } 899 } 900 901 static device_method_t pnp_methods[] = { 902 /* Device interface */ 903 DEVMETHOD(device_identify, pnp_identify), 904 905 { 0, 0 } 906 }; 907 908 static driver_t pnp_driver = { 909 "pnp", 910 pnp_methods, 911 1, /* no softc */ 912 }; 913 914 static devclass_t pnp_devclass; 915 916 DRIVER_MODULE(pnp, isa, pnp_driver, pnp_devclass, 0, 0);
Cache object: 0b3c571ebc2b5bd0b525b19b5217e2eb
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