1 /* 2 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com> 3 * Andreas Heppel <aheppel@sysgo.de> 4 * 5 * (C) Copyright 2002, 2003 6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 7 * 8 * See file CREDITS for list of people who contributed to this 9 * project. 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License as 13 * published by the Free Software Foundation; either version 2 of 14 * the License, or (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 24 * MA 02111-1307 USA 25 */ 26 27 /* 28 * PCI routines 29 */ 30 31 #include <common.h> 32 33 #include <command.h> 34 #include <asm/processor.h> 35 #include <asm/io.h> 36 #include <pci.h> 37 38 #define PCI_HOSE_OP(rw, size, type) \ 39 int pci_hose_##rw##_config_##size(struct pci_controller *hose, \ 40 pci_dev_t dev, \ 41 int offset, type value) \ 42 { \ 43 return hose->rw##_##size(hose, dev, offset, value); \ 44 } 45 46 PCI_HOSE_OP(read, byte, u8 *) 47 PCI_HOSE_OP(read, word, u16 *) 48 PCI_HOSE_OP(read, dword, u32 *) 49 PCI_HOSE_OP(write, byte, u8) 50 PCI_HOSE_OP(write, word, u16) 51 PCI_HOSE_OP(write, dword, u32) 52 53 #define PCI_OP(rw, size, type, error_code) \ 54 int pci_##rw##_config_##size(pci_dev_t dev, int offset, type value) \ 55 { \ 56 struct pci_controller *hose = pci_bus_to_hose(PCI_BUS(dev)); \ 57 \ 58 if (!hose) \ 59 { \ 60 error_code; \ 61 return -1; \ 62 } \ 63 \ 64 return pci_hose_##rw##_config_##size(hose, dev, offset, value); \ 65 } 66 67 PCI_OP(read, byte, u8 *, *value = 0xff) 68 PCI_OP(read, word, u16 *, *value = 0xffff) 69 PCI_OP(read, dword, u32 *, *value = 0xffffffff) 70 PCI_OP(write, byte, u8, ) 71 PCI_OP(write, word, u16, ) 72 PCI_OP(write, dword, u32, ) 73 74 #define PCI_READ_VIA_DWORD_OP(size, type, off_mask) \ 75 int pci_hose_read_config_##size##_via_dword(struct pci_controller *hose,\ 76 pci_dev_t dev, \ 77 int offset, type val) \ 78 { \ 79 u32 val32; \ 80 \ 81 if (pci_hose_read_config_dword(hose, dev, offset & 0xfc, &val32) < 0) { \ 82 *val = -1; \ 83 return -1; \ 84 } \ 85 \ 86 *val = (val32 >> ((offset & (int)off_mask) * 8)); \ 87 \ 88 return 0; \ 89 } 90 91 #define PCI_WRITE_VIA_DWORD_OP(size, type, off_mask, val_mask) \ 92 int pci_hose_write_config_##size##_via_dword(struct pci_controller *hose,\ 93 pci_dev_t dev, \ 94 int offset, type val) \ 95 { \ 96 u32 val32, mask, ldata, shift; \ 97 \ 98 if (pci_hose_read_config_dword(hose, dev, offset & 0xfc, &val32) < 0)\ 99 return -1; \ 100 \ 101 shift = ((offset & (int)off_mask) * 8); \ 102 ldata = (((unsigned long)val) & val_mask) << shift; \ 103 mask = val_mask << shift; \ 104 val32 = (val32 & ~mask) | ldata; \ 105 \ 106 if (pci_hose_write_config_dword(hose, dev, offset & 0xfc, val32) < 0)\ 107 return -1; \ 108 \ 109 return 0; \ 110 } 111 112 PCI_READ_VIA_DWORD_OP(byte, u8 *, 0x03) 113 PCI_READ_VIA_DWORD_OP(word, u16 *, 0x02) 114 PCI_WRITE_VIA_DWORD_OP(byte, u8, 0x03, 0x000000ff) 115 PCI_WRITE_VIA_DWORD_OP(word, u16, 0x02, 0x0000ffff) 116 117 /* Get a virtual address associated with a BAR region */ 118 void *pci_map_bar(pci_dev_t pdev, int bar, int flags) 119 { 120 pci_addr_t pci_bus_addr; 121 u32 bar_response; 122 123 /* read BAR address */ 124 pci_read_config_dword(pdev, bar, &bar_response); 125 pci_bus_addr = (pci_addr_t)(bar_response & ~0xf); 126 127 /* 128 * Pass "0" as the length argument to pci_bus_to_virt. The arg 129 * isn't actualy used on any platform because u-boot assumes a static 130 * linear mapping. In the future, this could read the BAR size 131 * and pass that as the size if needed. 132 */ 133 return pci_bus_to_virt(pdev, pci_bus_addr, flags, 0, MAP_NOCACHE); 134 } 135 136 /* 137 * 138 */ 139 140 static struct pci_controller* hose_head; 141 142 void pci_register_hose(struct pci_controller* hose) 143 { 144 struct pci_controller **phose = &hose_head; 145 146 while(*phose) 147 phose = &(*phose)->next; 148 149 hose->next = NULL; 150 151 *phose = hose; 152 } 153 154 struct pci_controller *pci_bus_to_hose (int bus) 155 { 156 struct pci_controller *hose; 157 158 for (hose = hose_head; hose; hose = hose->next) 159 if (bus >= hose->first_busno && bus <= hose->last_busno) 160 return hose; 161 162 printf("pci_bus_to_hose() failed\n"); 163 return NULL; 164 } 165 166 struct pci_controller *find_hose_by_cfg_addr(void *cfg_addr) 167 { 168 struct pci_controller *hose; 169 170 for (hose = hose_head; hose; hose = hose->next) { 171 if (hose->cfg_addr == cfg_addr) 172 return hose; 173 } 174 175 return NULL; 176 } 177 178 int pci_last_busno(void) 179 { 180 struct pci_controller *hose = hose_head; 181 182 if (!hose) 183 return -1; 184 185 while (hose->next) 186 hose = hose->next; 187 188 return hose->last_busno; 189 } 190 191 pci_dev_t pci_find_devices(struct pci_device_id *ids, int index) 192 { 193 struct pci_controller * hose; 194 u16 vendor, device; 195 u8 header_type; 196 pci_dev_t bdf; 197 int i, bus, found_multi = 0; 198 199 for (hose = hose_head; hose; hose = hose->next) 200 { 201 #ifdef CONFIG_SYS_SCSI_SCAN_BUS_REVERSE 202 for (bus = hose->last_busno; bus >= hose->first_busno; bus--) 203 #else 204 for (bus = hose->first_busno; bus <= hose->last_busno; bus++) 205 #endif 206 for (bdf = PCI_BDF(bus,0,0); 207 #if defined(CONFIG_ELPPC) || defined(CONFIG_PPMC7XX) 208 bdf < PCI_BDF(bus,PCI_MAX_PCI_DEVICES-1,PCI_MAX_PCI_FUNCTIONS-1); 209 #else 210 bdf < PCI_BDF(bus+1,0,0); 211 #endif 212 bdf += PCI_BDF(0,0,1)) 213 { 214 if (!PCI_FUNC(bdf)) { 215 pci_read_config_byte(bdf, 216 PCI_HEADER_TYPE, 217 &header_type); 218 219 found_multi = header_type & 0x80; 220 } else { 221 if (!found_multi) 222 continue; 223 } 224 225 pci_read_config_word(bdf, 226 PCI_VENDOR_ID, 227 &vendor); 228 pci_read_config_word(bdf, 229 PCI_DEVICE_ID, 230 &device); 231 232 for (i=0; ids[i].vendor != 0; i++) 233 if (vendor == ids[i].vendor && 234 device == ids[i].device) 235 { 236 if (index <= 0) 237 return bdf; 238 239 index--; 240 } 241 } 242 } 243 244 return (-1); 245 } 246 247 pci_dev_t pci_find_device(unsigned int vendor, unsigned int device, int index) 248 { 249 static struct pci_device_id ids[2] = {{}, {0, 0}}; 250 251 ids[0].vendor = vendor; 252 ids[0].device = device; 253 254 return pci_find_devices(ids, index); 255 } 256 257 /* 258 * 259 */ 260 261 int __pci_hose_phys_to_bus (struct pci_controller *hose, 262 phys_addr_t phys_addr, 263 unsigned long flags, 264 unsigned long skip_mask, 265 pci_addr_t *ba) 266 { 267 struct pci_region *res; 268 pci_addr_t bus_addr; 269 int i; 270 271 for (i = 0; i < hose->region_count; i++) { 272 res = &hose->regions[i]; 273 274 if (((res->flags ^ flags) & PCI_REGION_TYPE) != 0) 275 continue; 276 277 if (res->flags & skip_mask) 278 continue; 279 280 bus_addr = phys_addr - res->phys_start + res->bus_start; 281 282 if (bus_addr >= res->bus_start && 283 bus_addr < res->bus_start + res->size) { 284 *ba = bus_addr; 285 return 0; 286 } 287 } 288 289 return 1; 290 } 291 292 pci_addr_t pci_hose_phys_to_bus (struct pci_controller *hose, 293 phys_addr_t phys_addr, 294 unsigned long flags) 295 { 296 pci_addr_t bus_addr = 0; 297 int ret; 298 299 if (!hose) { 300 puts ("pci_hose_phys_to_bus: invalid hose\n"); 301 return bus_addr; 302 } 303 304 /* if PCI_REGION_MEM is set we do a two pass search with preference 305 * on matches that don't have PCI_REGION_SYS_MEMORY set */ 306 if ((flags & PCI_REGION_MEM) == PCI_REGION_MEM) { 307 ret = __pci_hose_phys_to_bus(hose, phys_addr, 308 flags, PCI_REGION_SYS_MEMORY, &bus_addr); 309 if (!ret) 310 return bus_addr; 311 } 312 313 ret = __pci_hose_phys_to_bus(hose, phys_addr, flags, 0, &bus_addr); 314 315 if (ret) 316 puts ("pci_hose_phys_to_bus: invalid physical address\n"); 317 318 return bus_addr; 319 } 320 321 int __pci_hose_bus_to_phys (struct pci_controller *hose, 322 pci_addr_t bus_addr, 323 unsigned long flags, 324 unsigned long skip_mask, 325 phys_addr_t *pa) 326 { 327 struct pci_region *res; 328 int i; 329 330 for (i = 0; i < hose->region_count; i++) { 331 res = &hose->regions[i]; 332 333 if (((res->flags ^ flags) & PCI_REGION_TYPE) != 0) 334 continue; 335 336 if (res->flags & skip_mask) 337 continue; 338 339 if (bus_addr >= res->bus_start && 340 bus_addr < res->bus_start + res->size) { 341 *pa = (bus_addr - res->bus_start + res->phys_start); 342 return 0; 343 } 344 } 345 346 return 1; 347 } 348 349 phys_addr_t pci_hose_bus_to_phys(struct pci_controller* hose, 350 pci_addr_t bus_addr, 351 unsigned long flags) 352 { 353 phys_addr_t phys_addr = 0; 354 int ret; 355 356 if (!hose) { 357 puts ("pci_hose_bus_to_phys: invalid hose\n"); 358 return phys_addr; 359 } 360 361 /* if PCI_REGION_MEM is set we do a two pass search with preference 362 * on matches that don't have PCI_REGION_SYS_MEMORY set */ 363 if ((flags & PCI_REGION_MEM) == PCI_REGION_MEM) { 364 ret = __pci_hose_bus_to_phys(hose, bus_addr, 365 flags, PCI_REGION_SYS_MEMORY, &phys_addr); 366 if (!ret) 367 return phys_addr; 368 } 369 370 ret = __pci_hose_bus_to_phys(hose, bus_addr, flags, 0, &phys_addr); 371 372 if (ret) 373 puts ("pci_hose_bus_to_phys: invalid physical address\n"); 374 375 return phys_addr; 376 } 377 378 /* 379 * 380 */ 381 382 int pci_hose_config_device(struct pci_controller *hose, 383 pci_dev_t dev, 384 unsigned long io, 385 pci_addr_t mem, 386 unsigned long command) 387 { 388 unsigned int bar_response, old_command; 389 pci_addr_t bar_value; 390 pci_size_t bar_size; 391 unsigned char pin; 392 int bar, found_mem64; 393 394 debug ("PCI Config: I/O=0x%lx, Memory=0x%llx, Command=0x%lx\n", 395 io, (u64)mem, command); 396 397 pci_hose_write_config_dword (hose, dev, PCI_COMMAND, 0); 398 399 for (bar = PCI_BASE_ADDRESS_0; bar <= PCI_BASE_ADDRESS_5; bar += 4) { 400 pci_hose_write_config_dword (hose, dev, bar, 0xffffffff); 401 pci_hose_read_config_dword (hose, dev, bar, &bar_response); 402 403 if (!bar_response) 404 continue; 405 406 found_mem64 = 0; 407 408 /* Check the BAR type and set our address mask */ 409 if (bar_response & PCI_BASE_ADDRESS_SPACE) { 410 bar_size = ~(bar_response & PCI_BASE_ADDRESS_IO_MASK) + 1; 411 /* round up region base address to a multiple of size */ 412 io = ((io - 1) | (bar_size - 1)) + 1; 413 bar_value = io; 414 /* compute new region base address */ 415 io = io + bar_size; 416 } else { 417 if ((bar_response & PCI_BASE_ADDRESS_MEM_TYPE_MASK) == 418 PCI_BASE_ADDRESS_MEM_TYPE_64) { 419 u32 bar_response_upper; 420 u64 bar64; 421 pci_hose_write_config_dword(hose, dev, bar+4, 0xffffffff); 422 pci_hose_read_config_dword(hose, dev, bar+4, &bar_response_upper); 423 424 bar64 = ((u64)bar_response_upper << 32) | bar_response; 425 426 bar_size = ~(bar64 & PCI_BASE_ADDRESS_MEM_MASK) + 1; 427 found_mem64 = 1; 428 } else { 429 bar_size = (u32)(~(bar_response & PCI_BASE_ADDRESS_MEM_MASK) + 1); 430 } 431 432 /* round up region base address to multiple of size */ 433 mem = ((mem - 1) | (bar_size - 1)) + 1; 434 bar_value = mem; 435 /* compute new region base address */ 436 mem = mem + bar_size; 437 } 438 439 /* Write it out and update our limit */ 440 pci_hose_write_config_dword (hose, dev, bar, (u32)bar_value); 441 442 if (found_mem64) { 443 bar += 4; 444 #ifdef CONFIG_SYS_PCI_64BIT 445 pci_hose_write_config_dword(hose, dev, bar, (u32)(bar_value>>32)); 446 #else 447 pci_hose_write_config_dword (hose, dev, bar, 0x00000000); 448 #endif 449 } 450 } 451 452 /* Configure Cache Line Size Register */ 453 pci_hose_write_config_byte (hose, dev, PCI_CACHE_LINE_SIZE, 0x08); 454 455 /* Configure Latency Timer */ 456 pci_hose_write_config_byte (hose, dev, PCI_LATENCY_TIMER, 0x80); 457 458 /* Disable interrupt line, if device says it wants to use interrupts */ 459 pci_hose_read_config_byte (hose, dev, PCI_INTERRUPT_PIN, &pin); 460 if (pin != 0) { 461 pci_hose_write_config_byte (hose, dev, PCI_INTERRUPT_LINE, 0xff); 462 } 463 464 pci_hose_read_config_dword (hose, dev, PCI_COMMAND, &old_command); 465 pci_hose_write_config_dword (hose, dev, PCI_COMMAND, 466 (old_command & 0xffff0000) | command); 467 468 return 0; 469 } 470 471 /* 472 * 473 */ 474 475 struct pci_config_table *pci_find_config(struct pci_controller *hose, 476 unsigned short class, 477 unsigned int vendor, 478 unsigned int device, 479 unsigned int bus, 480 unsigned int dev, 481 unsigned int func) 482 { 483 struct pci_config_table *table; 484 485 for (table = hose->config_table; table && table->vendor; table++) { 486 if ((table->vendor == PCI_ANY_ID || table->vendor == vendor) && 487 (table->device == PCI_ANY_ID || table->device == device) && 488 (table->class == PCI_ANY_ID || table->class == class) && 489 (table->bus == PCI_ANY_ID || table->bus == bus) && 490 (table->dev == PCI_ANY_ID || table->dev == dev) && 491 (table->func == PCI_ANY_ID || table->func == func)) { 492 return table; 493 } 494 } 495 496 return NULL; 497 } 498 499 void pci_cfgfunc_config_device(struct pci_controller *hose, 500 pci_dev_t dev, 501 struct pci_config_table *entry) 502 { 503 pci_hose_config_device(hose, dev, entry->priv[0], entry->priv[1], entry->priv[2]); 504 } 505 506 void pci_cfgfunc_do_nothing(struct pci_controller *hose, 507 pci_dev_t dev, struct pci_config_table *entry) 508 { 509 } 510 511 /* 512 * 513 */ 514 515 /* HJF: Changed this to return int. I think this is required 516 * to get the correct result when scanning bridges 517 */ 518 extern int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev); 519 extern void pciauto_config_init(struct pci_controller *hose); 520 521 #if defined(CONFIG_CMD_PCI) || defined(CONFIG_PCI_SCAN_SHOW) 522 const char * pci_class_str(u8 class) 523 { 524 switch (class) { 525 case PCI_CLASS_NOT_DEFINED: 526 return "Build before PCI Rev2.0"; 527 break; 528 case PCI_BASE_CLASS_STORAGE: 529 return "Mass storage controller"; 530 break; 531 case PCI_BASE_CLASS_NETWORK: 532 return "Network controller"; 533 break; 534 case PCI_BASE_CLASS_DISPLAY: 535 return "Display controller"; 536 break; 537 case PCI_BASE_CLASS_MULTIMEDIA: 538 return "Multimedia device"; 539 break; 540 case PCI_BASE_CLASS_MEMORY: 541 return "Memory controller"; 542 break; 543 case PCI_BASE_CLASS_BRIDGE: 544 return "Bridge device"; 545 break; 546 case PCI_BASE_CLASS_COMMUNICATION: 547 return "Simple comm. controller"; 548 break; 549 case PCI_BASE_CLASS_SYSTEM: 550 return "Base system peripheral"; 551 break; 552 case PCI_BASE_CLASS_INPUT: 553 return "Input device"; 554 break; 555 case PCI_BASE_CLASS_DOCKING: 556 return "Docking station"; 557 break; 558 case PCI_BASE_CLASS_PROCESSOR: 559 return "Processor"; 560 break; 561 case PCI_BASE_CLASS_SERIAL: 562 return "Serial bus controller"; 563 break; 564 case PCI_BASE_CLASS_INTELLIGENT: 565 return "Intelligent controller"; 566 break; 567 case PCI_BASE_CLASS_SATELLITE: 568 return "Satellite controller"; 569 break; 570 case PCI_BASE_CLASS_CRYPT: 571 return "Cryptographic device"; 572 break; 573 case PCI_BASE_CLASS_SIGNAL_PROCESSING: 574 return "DSP"; 575 break; 576 case PCI_CLASS_OTHERS: 577 return "Does not fit any class"; 578 break; 579 default: 580 return "???"; 581 break; 582 }; 583 } 584 #endif /* CONFIG_CMD_PCI || CONFIG_PCI_SCAN_SHOW */ 585 586 int __pci_skip_dev(struct pci_controller *hose, pci_dev_t dev) 587 { 588 /* 589 * Check if pci device should be skipped in configuration 590 */ 591 if (dev == PCI_BDF(hose->first_busno, 0, 0)) { 592 #if defined(CONFIG_PCI_CONFIG_HOST_BRIDGE) /* don't skip host bridge */ 593 /* 594 * Only skip configuration if "pciconfighost" is not set 595 */ 596 if (getenv("pciconfighost") == NULL) 597 return 1; 598 #else 599 return 1; 600 #endif 601 } 602 603 return 0; 604 } 605 int pci_skip_dev(struct pci_controller *hose, pci_dev_t dev) 606 __attribute__((weak, alias("__pci_skip_dev"))); 607 608 #ifdef CONFIG_PCI_SCAN_SHOW 609 int __pci_print_dev(struct pci_controller *hose, pci_dev_t dev) 610 { 611 if (dev == PCI_BDF(hose->first_busno, 0, 0)) 612 return 0; 613 614 return 1; 615 } 616 int pci_print_dev(struct pci_controller *hose, pci_dev_t dev) 617 __attribute__((weak, alias("__pci_print_dev"))); 618 #endif /* CONFIG_PCI_SCAN_SHOW */ 619 620 int pci_hose_scan_bus(struct pci_controller *hose, int bus) 621 { 622 unsigned int sub_bus, found_multi=0; 623 unsigned short vendor, device, class; 624 unsigned char header_type; 625 struct pci_config_table *cfg; 626 pci_dev_t dev; 627 #ifdef CONFIG_PCI_SCAN_SHOW 628 static int indent = 0; 629 #endif 630 631 sub_bus = bus; 632 633 for (dev = PCI_BDF(bus,0,0); 634 dev < PCI_BDF(bus,PCI_MAX_PCI_DEVICES-1,PCI_MAX_PCI_FUNCTIONS-1); 635 dev += PCI_BDF(0,0,1)) { 636 637 if (pci_skip_dev(hose, dev)) 638 continue; 639 640 if (PCI_FUNC(dev) && !found_multi) 641 continue; 642 643 pci_hose_read_config_byte(hose, dev, PCI_HEADER_TYPE, &header_type); 644 645 pci_hose_read_config_word(hose, dev, PCI_VENDOR_ID, &vendor); 646 647 if (vendor == 0xffff || vendor == 0x0000) 648 continue; 649 650 if (!PCI_FUNC(dev)) 651 found_multi = header_type & 0x80; 652 653 debug ("PCI Scan: Found Bus %d, Device %d, Function %d\n", 654 PCI_BUS(dev), PCI_DEV(dev), PCI_FUNC(dev) ); 655 656 pci_hose_read_config_word(hose, dev, PCI_DEVICE_ID, &device); 657 pci_hose_read_config_word(hose, dev, PCI_CLASS_DEVICE, &class); 658 659 #ifdef CONFIG_PCI_SCAN_SHOW 660 indent++; 661 662 /* Print leading space, including bus indentation */ 663 printf("%*c", indent + 1, ' '); 664 665 if (pci_print_dev(hose, dev)) { 666 printf("%02x:%02x.%-*x - %04x:%04x - %s\n", 667 PCI_BUS(dev), PCI_DEV(dev), 6 - indent, PCI_FUNC(dev), 668 vendor, device, pci_class_str(class >> 8)); 669 } 670 #endif 671 672 cfg = pci_find_config(hose, class, vendor, device, 673 PCI_BUS(dev), PCI_DEV(dev), PCI_FUNC(dev)); 674 if (cfg) { 675 cfg->config_device(hose, dev, cfg); 676 sub_bus = max(sub_bus, hose->current_busno); 677 #ifdef CONFIG_PCI_PNP 678 } else { 679 int n = pciauto_config_device(hose, dev); 680 681 sub_bus = max(sub_bus, n); 682 #endif 683 } 684 685 #ifdef CONFIG_PCI_SCAN_SHOW 686 indent--; 687 #endif 688 689 if (hose->fixup_irq) 690 hose->fixup_irq(hose, dev); 691 } 692 693 return sub_bus; 694 } 695 696 int pci_hose_scan(struct pci_controller *hose) 697 { 698 #if defined(CONFIG_PCI_BOOTDELAY) 699 static int pcidelay_done; 700 char *s; 701 int i; 702 703 if (!pcidelay_done) { 704 /* wait "pcidelay" ms (if defined)... */ 705 s = getenv("pcidelay"); 706 if (s) { 707 int val = simple_strtoul(s, NULL, 10); 708 for (i = 0; i < val; i++) 709 udelay(1000); 710 } 711 pcidelay_done = 1; 712 } 713 #endif /* CONFIG_PCI_BOOTDELAY */ 714 715 /* Start scan at current_busno. 716 * PCIe will start scan at first_busno+1. 717 */ 718 /* For legacy support, ensure current>=first */ 719 if (hose->first_busno > hose->current_busno) 720 hose->current_busno = hose->first_busno; 721 #ifdef CONFIG_PCI_PNP 722 pciauto_config_init(hose); 723 #endif 724 return pci_hose_scan_bus(hose, hose->current_busno); 725 } 726 727 void pci_init(void) 728 { 729 hose_head = NULL; 730 731 /* now call board specific pci_init()... */ 732 pci_init_board(); 733 } 734