drivers/pci/pci.c

   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  * SPDX-License-Identifier:     GPL-2.0+
   9  */
  10
  11 /*
  12  * PCI routines
  13  */
  14
  15 #include <common.h>
  16
  17 #include <command.h>
  18 #include <asm/processor.h>
  19 #include <asm/io.h>
  20 #include <pci.h>
  21
  22 #define PCI_HOSE_OP(rw, size, type)                                     \
  23 int pci_hose_##rw##_config_##size(struct pci_controller *hose,          \
  24                                   pci_dev_t dev,                        \
  25                                   int offset, type value)               \
  26 {                                                                       \
  27         return hose->rw##_##size(hose, dev, offset, value);             \
  28 }
  29
  30 PCI_HOSE_OP(read, byte, u8 *)
  31 PCI_HOSE_OP(read, word, u16 *)
  32 PCI_HOSE_OP(read, dword, u32 *)
  33 PCI_HOSE_OP(write, byte, u8)
  34 PCI_HOSE_OP(write, word, u16)
  35 PCI_HOSE_OP(write, dword, u32)
  36
  37 #define PCI_OP(rw, size, type, error_code)                              \
  38 int pci_##rw##_config_##size(pci_dev_t dev, int offset, type value)     \
  39 {                                                                       \
  40         struct pci_controller *hose = pci_bus_to_hose(PCI_BUS(dev));    \
  41                                                                         \
  42         if (!hose)                                                      \
  43         {                                                               \
  44                 error_code;                                             \
  45                 return -1;                                              \
  46         }                                                               \
  47                                                                         \
  48         return pci_hose_##rw##_config_##size(hose, dev, offset, value); \
  49 }
  50
  51 PCI_OP(read, byte, u8 *, *value = 0xff)
  52 PCI_OP(read, word, u16 *, *value = 0xffff)
  53 PCI_OP(read, dword, u32 *, *value = 0xffffffff)
  54 PCI_OP(write, byte, u8, )
  55 PCI_OP(write, word, u16, )
  56 PCI_OP(write, dword, u32, )
  57
  58 #define PCI_READ_VIA_DWORD_OP(size, type, off_mask)                     \
  59 int pci_hose_read_config_##size##_via_dword(struct pci_controller *hose,\
  60                                         pci_dev_t dev,                  \
  61                                         int offset, type val)           \
  62 {                                                                       \
  63         u32 val32;                                                      \
  64                                                                         \
  65         if (pci_hose_read_config_dword(hose, dev, offset & 0xfc, &val32) < 0) { \
  66                 *val = -1;                                              \
  67                 return -1;                                              \
  68         }                                                               \
  69                                                                         \
  70         *val = (val32 >> ((offset & (int)off_mask) * 8));               \
  71                                                                         \
  72         return 0;                                                       \
  73 }
  74
  75 #define PCI_WRITE_VIA_DWORD_OP(size, type, off_mask, val_mask)          \
  76 int pci_hose_write_config_##size##_via_dword(struct pci_controller *hose,\
  77                                              pci_dev_t dev,             \
  78                                              int offset, type val)      \
  79 {                                                                       \
  80         u32 val32, mask, ldata, shift;                                  \
  81                                                                         \
  82         if (pci_hose_read_config_dword(hose, dev, offset & 0xfc, &val32) < 0)\
  83                 return -1;                                              \
  84                                                                         \
  85         shift = ((offset & (int)off_mask) * 8);                         \
  86         ldata = (((unsigned long)val) & val_mask) << shift;             \
  87         mask = val_mask << shift;                                       \
  88         val32 = (val32 & ~mask) | ldata;                                \
  89                                                                         \
  90         if (pci_hose_write_config_dword(hose, dev, offset & 0xfc, val32) < 0)\
  91                 return -1;                                              \
  92                                                                         \
  93         return 0;                                                       \
  94 }
  95
  96 PCI_READ_VIA_DWORD_OP(byte, u8 *, 0x03)
  97 PCI_READ_VIA_DWORD_OP(word, u16 *, 0x02)
  98 PCI_WRITE_VIA_DWORD_OP(byte, u8, 0x03, 0x000000ff)
  99 PCI_WRITE_VIA_DWORD_OP(word, u16, 0x02, 0x0000ffff)
 100
 101 /* Get a virtual address associated with a BAR region */
 102 void *pci_map_bar(pci_dev_t pdev, int bar, int flags)
 103 {
 104         pci_addr_t pci_bus_addr;
 105         u32 bar_response;
 106
 107         /* read BAR address */
 108         pci_read_config_dword(pdev, bar, &bar_response);
 109         pci_bus_addr = (pci_addr_t)(bar_response & ~0xf);
 110
 111         /*
 112          * Pass "0" as the length argument to pci_bus_to_virt.  The arg
 113          * isn't actualy used on any platform because u-boot assumes a static
 114          * linear mapping.  In the future, this could read the BAR size
 115          * and pass that as the size if needed.
 116          */
 117         return pci_bus_to_virt(pdev, pci_bus_addr, flags, 0, MAP_NOCACHE);
 118 }
 119
 120 /*
 121  *
 122  */
 123
 124 static struct pci_controller* hose_head;
 125
 126 void pci_register_hose(struct pci_controller* hose)
 127 {
 128         struct pci_controller **phose = &hose_head;
 129
 130         while(*phose)
 131                 phose = &(*phose)->next;
 132
 133         hose->next = NULL;
 134
 135         *phose = hose;
 136 }
 137
 138 struct pci_controller *pci_bus_to_hose(int bus)
 139 {
 140         struct pci_controller *hose;
 141
 142         for (hose = hose_head; hose; hose = hose->next) {
 143                 if (bus >= hose->first_busno && bus <= hose->last_busno)
 144                         return hose;
 145         }
 146
 147         printf("pci_bus_to_hose() failed\n");
 148         return NULL;
 149 }
 150
 151 struct pci_controller *find_hose_by_cfg_addr(void *cfg_addr)
 152 {
 153         struct pci_controller *hose;
 154
 155         for (hose = hose_head; hose; hose = hose->next) {
 156                 if (hose->cfg_addr == cfg_addr)
 157                         return hose;
 158         }
 159
 160         return NULL;
 161 }
 162
 163 int pci_last_busno(void)
 164 {
 165         struct pci_controller *hose = hose_head;
 166
 167         if (!hose)
 168                 return -1;
 169
 170         while (hose->next)
 171                 hose = hose->next;
 172
 173         return hose->last_busno;
 174 }
 175
 176 pci_dev_t pci_find_devices(struct pci_device_id *ids, int index)
 177 {
 178         struct pci_controller * hose;
 179         u16 vendor, device;
 180         u8 header_type;
 181         pci_dev_t bdf;
 182         int i, bus, found_multi = 0;
 183
 184         for (hose = hose_head; hose; hose = hose->next) {
 185 #ifdef CONFIG_SYS_SCSI_SCAN_BUS_REVERSE
 186                 for (bus = hose->last_busno; bus >= hose->first_busno; bus--)
 187 #else
 188                 for (bus = hose->first_busno; bus <= hose->last_busno; bus++)
 189 #endif
 190                         for (bdf = PCI_BDF(bus, 0, 0);
 191 #if defined(CONFIG_ELPPC) || defined(CONFIG_PPMC7XX)
 192                              bdf < PCI_BDF(bus, PCI_MAX_PCI_DEVICES - 1,
 193                                 PCI_MAX_PCI_FUNCTIONS - 1);
 194 #else
 195                              bdf < PCI_BDF(bus + 1, 0, 0);
 196 #endif
 197                              bdf += PCI_BDF(0, 0, 1)) {
 198                                 if (!PCI_FUNC(bdf)) {
 199                                         pci_read_config_byte(bdf,
 200                                                              PCI_HEADER_TYPE,
 201                                                              &header_type);
 202
 203                                         found_multi = header_type & 0x80;
 204                                 } else {
 205                                         if (!found_multi)
 206                                                 continue;
 207                                 }
 208
 209                                 pci_read_config_word(bdf,
 210                                                      PCI_VENDOR_ID,
 211                                                      &vendor);
 212                                 pci_read_config_word(bdf,
 213                                                      PCI_DEVICE_ID,
 214                                                      &device);
 215
 216                                 for (i = 0; ids[i].vendor != 0; i++) {
 217                                         if (vendor == ids[i].vendor &&
 218                                             device == ids[i].device) {
 219                                                 if (index <= 0)
 220                                                         return bdf;
 221
 222                                                 index--;
 223                                         }
 224                                 }
 225                         }
 226         }
 227
 228         return -1;
 229 }
 230
 231 pci_dev_t pci_find_device(unsigned int vendor, unsigned int device, int index)
 232 {
 233         static struct pci_device_id ids[2] = {{}, {0, 0}};
 234
 235         ids[0].vendor = vendor;
 236         ids[0].device = device;
 237
 238         return pci_find_devices(ids, index);
 239 }
 240
 241 /*
 242  *
 243  */
 244
 245 int __pci_hose_phys_to_bus(struct pci_controller *hose,
 246                                 phys_addr_t phys_addr,
 247                                 unsigned long flags,
 248                                 unsigned long skip_mask,
 249                                 pci_addr_t *ba)
 250 {
 251         struct pci_region *res;
 252         pci_addr_t bus_addr;
 253         int i;
 254
 255         for (i = 0; i < hose->region_count; i++) {
 256                 res = &hose->regions[i];
 257
 258                 if (((res->flags ^ flags) & PCI_REGION_TYPE) != 0)
 259                         continue;
 260
 261                 if (res->flags & skip_mask)
 262                         continue;
 263
 264                 bus_addr = phys_addr - res->phys_start + res->bus_start;
 265
 266                 if (bus_addr >= res->bus_start &&
 267                         bus_addr < res->bus_start + res->size) {
 268                         *ba = bus_addr;
 269                         return 0;
 270                 }
 271         }
 272
 273         return 1;
 274 }
 275
 276 pci_addr_t pci_hose_phys_to_bus (struct pci_controller *hose,
 277                                     phys_addr_t phys_addr,
 278                                     unsigned long flags)
 279 {
 280         pci_addr_t bus_addr = 0;
 281         int ret;
 282
 283         if (!hose) {
 284                 puts("pci_hose_phys_to_bus: invalid hose\n");
 285                 return bus_addr;
 286         }
 287
 288         /*
 289          * if PCI_REGION_MEM is set we do a two pass search with preference
 290          * on matches that don't have PCI_REGION_SYS_MEMORY set
 291          */
 292         if ((flags & PCI_REGION_MEM) == PCI_REGION_MEM) {
 293                 ret = __pci_hose_phys_to_bus(hose, phys_addr,
 294                                 flags, PCI_REGION_SYS_MEMORY, &bus_addr);
 295                 if (!ret)
 296                         return bus_addr;
 297         }
 298
 299         ret = __pci_hose_phys_to_bus(hose, phys_addr, flags, 0, &bus_addr);
 300
 301         if (ret)
 302                 puts("pci_hose_phys_to_bus: invalid physical address\n");
 303
 304         return bus_addr;
 305 }
 306
 307 int __pci_hose_bus_to_phys(struct pci_controller *hose,
 308                                 pci_addr_t bus_addr,
 309                                 unsigned long flags,
 310                                 unsigned long skip_mask,
 311                                 phys_addr_t *pa)
 312 {
 313         struct pci_region *res;
 314         int i;
 315
 316         for (i = 0; i < hose->region_count; i++) {
 317                 res = &hose->regions[i];
 318
 319                 if (((res->flags ^ flags) & PCI_REGION_TYPE) != 0)
 320                         continue;
 321
 322                 if (res->flags & skip_mask)
 323                         continue;
 324
 325                 if (bus_addr >= res->bus_start &&
 326                         bus_addr < res->bus_start + res->size) {
 327                         *pa = (bus_addr - res->bus_start + res->phys_start);
 328                         return 0;
 329                 }
 330         }
 331
 332         return 1;
 333 }
 334
 335 phys_addr_t pci_hose_bus_to_phys(struct pci_controller* hose,
 336                                  pci_addr_t bus_addr,
 337                                  unsigned long flags)
 338 {
 339         phys_addr_t phys_addr = 0;
 340         int ret;
 341
 342         if (!hose) {
 343                 puts("pci_hose_bus_to_phys: invalid hose\n");
 344                 return phys_addr;
 345         }
 346
 347         /*
 348          * if PCI_REGION_MEM is set we do a two pass search with preference
 349          * on matches that don't have PCI_REGION_SYS_MEMORY set
 350          */
 351         if ((flags & PCI_REGION_MEM) == PCI_REGION_MEM) {
 352                 ret = __pci_hose_bus_to_phys(hose, bus_addr,
 353                                 flags, PCI_REGION_SYS_MEMORY, &phys_addr);
 354                 if (!ret)
 355                         return phys_addr;
 356         }
 357
 358         ret = __pci_hose_bus_to_phys(hose, bus_addr, flags, 0, &phys_addr);
 359
 360         if (ret)
 361                 puts("pci_hose_bus_to_phys: invalid physical address\n");
 362
 363         return phys_addr;
 364 }
 365
 366 /*
 367  *
 368  */
 369
 370 int pci_hose_config_device(struct pci_controller *hose,
 371                            pci_dev_t dev,
 372                            unsigned long io,
 373                            pci_addr_t mem,
 374                            unsigned long command)
 375 {
 376         u32 bar_response;
 377         unsigned int old_command;
 378         pci_addr_t bar_value;
 379         pci_size_t bar_size;
 380         unsigned char pin;
 381         int bar, found_mem64;
 382
 383         debug("PCI Config: I/O=0x%lx, Memory=0x%llx, Command=0x%lx\n", io,
 384                 (u64)mem, command);
 385
 386         pci_hose_write_config_dword(hose, dev, PCI_COMMAND, 0);
 387
 388         for (bar = PCI_BASE_ADDRESS_0; bar <= PCI_BASE_ADDRESS_5; bar += 4) {
 389                 pci_hose_write_config_dword(hose, dev, bar, 0xffffffff);
 390                 pci_hose_read_config_dword(hose, dev, bar, &bar_response);
 391
 392                 if (!bar_response)
 393                         continue;
 394
 395                 found_mem64 = 0;
 396
 397                 /* Check the BAR type and set our address mask */
 398                 if (bar_response & PCI_BASE_ADDRESS_SPACE) {
 399                         bar_size = ~(bar_response & PCI_BASE_ADDRESS_IO_MASK) + 1;
 400                         /* round up region base address to a multiple of size */
 401                         io = ((io - 1) | (bar_size - 1)) + 1;
 402                         bar_value = io;
 403                         /* compute new region base address */
 404                         io = io + bar_size;
 405                 } else {
 406                         if ((bar_response & PCI_BASE_ADDRESS_MEM_TYPE_MASK) ==
 407                                 PCI_BASE_ADDRESS_MEM_TYPE_64) {
 408                                 u32 bar_response_upper;
 409                                 u64 bar64;
 410                                 pci_hose_write_config_dword(hose, dev, bar + 4,
 411                                         0xffffffff);
 412                                 pci_hose_read_config_dword(hose, dev, bar + 4,
 413                                         &bar_response_upper);
 414
 415                                 bar64 = ((u64)bar_response_upper << 32) | bar_response;
 416
 417                                 bar_size = ~(bar64 & PCI_BASE_ADDRESS_MEM_MASK) + 1;
 418                                 found_mem64 = 1;
 419                         } else {
 420                                 bar_size = (u32)(~(bar_response & PCI_BASE_ADDRESS_MEM_MASK) + 1);
 421                         }
 422
 423                         /* round up region base address to multiple of size */
 424                         mem = ((mem - 1) | (bar_size - 1)) + 1;
 425                         bar_value = mem;
 426                         /* compute new region base address */
 427                         mem = mem + bar_size;
 428                 }
 429
 430                 /* Write it out and update our limit */
 431                 pci_hose_write_config_dword (hose, dev, bar, (u32)bar_value);
 432
 433                 if (found_mem64) {
 434                         bar += 4;
 435 #ifdef CONFIG_SYS_PCI_64BIT
 436                         pci_hose_write_config_dword(hose, dev, bar,
 437                                 (u32)(bar_value >> 32));
 438 #else
 439                         pci_hose_write_config_dword(hose, dev, bar, 0x00000000);
 440 #endif
 441                 }
 442         }
 443
 444         /* Configure Cache Line Size Register */
 445         pci_hose_write_config_byte(hose, dev, PCI_CACHE_LINE_SIZE, 0x08);
 446
 447         /* Configure Latency Timer */
 448         pci_hose_write_config_byte(hose, dev, PCI_LATENCY_TIMER, 0x80);
 449
 450         /* Disable interrupt line, if device says it wants to use interrupts */
 451         pci_hose_read_config_byte(hose, dev, PCI_INTERRUPT_PIN, &pin);
 452         if (pin != 0) {
 453                 pci_hose_write_config_byte(hose, dev, PCI_INTERRUPT_LINE, 0xff);
 454         }
 455
 456         pci_hose_read_config_dword(hose, dev, PCI_COMMAND, &old_command);
 457         pci_hose_write_config_dword(hose, dev, PCI_COMMAND,
 458                                      (old_command & 0xffff0000) | command);
 459
 460         return 0;
 461 }
 462
 463 /*
 464  *
 465  */
 466
 467 struct pci_config_table *pci_find_config(struct pci_controller *hose,
 468                                          unsigned short class,
 469                                          unsigned int vendor,
 470                                          unsigned int device,
 471                                          unsigned int bus,
 472                                          unsigned int dev,
 473                                          unsigned int func)
 474 {
 475         struct pci_config_table *table;
 476
 477         for (table = hose->config_table; table && table->vendor; table++) {
 478                 if ((table->vendor == PCI_ANY_ID || table->vendor == vendor) &&
 479                     (table->device == PCI_ANY_ID || table->device == device) &&
 480                     (table->class  == PCI_ANY_ID || table->class  == class)  &&
 481                     (table->bus    == PCI_ANY_ID || table->bus    == bus)    &&
 482                     (table->dev    == PCI_ANY_ID || table->dev    == dev)    &&
 483                     (table->func   == PCI_ANY_ID || table->func   == func)) {
 484                         return table;
 485                 }
 486         }
 487
 488         return NULL;
 489 }
 490
 491 void pci_cfgfunc_config_device(struct pci_controller *hose,
 492                                pci_dev_t dev,
 493                                struct pci_config_table *entry)
 494 {
 495         pci_hose_config_device(hose, dev, entry->priv[0], entry->priv[1],
 496                 entry->priv[2]);
 497 }
 498
 499 void pci_cfgfunc_do_nothing(struct pci_controller *hose,
 500                             pci_dev_t dev, struct pci_config_table *entry)
 501 {
 502 }
 503
 504 /*
 505  * HJF: Changed this to return int. I think this is required
 506  * to get the correct result when scanning bridges
 507  */
 508 extern int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev);
 509
 510 #if defined(CONFIG_CMD_PCI) || defined(CONFIG_PCI_SCAN_SHOW)
 511 const char * pci_class_str(u8 class)
 512 {
 513         switch (class) {
 514         case PCI_CLASS_NOT_DEFINED:
 515                 return "Build before PCI Rev2.0";
 516                 break;
 517         case PCI_BASE_CLASS_STORAGE:
 518                 return "Mass storage controller";
 519                 break;
 520         case PCI_BASE_CLASS_NETWORK:
 521                 return "Network controller";
 522                 break;
 523         case PCI_BASE_CLASS_DISPLAY:
 524                 return "Display controller";
 525                 break;
 526         case PCI_BASE_CLASS_MULTIMEDIA:
 527                 return "Multimedia device";
 528                 break;
 529         case PCI_BASE_CLASS_MEMORY:
 530                 return "Memory controller";
 531                 break;
 532         case PCI_BASE_CLASS_BRIDGE:
 533                 return "Bridge device";
 534                 break;
 535         case PCI_BASE_CLASS_COMMUNICATION:
 536                 return "Simple comm. controller";
 537                 break;
 538         case PCI_BASE_CLASS_SYSTEM:
 539                 return "Base system peripheral";
 540                 break;
 541         case PCI_BASE_CLASS_INPUT:
 542                 return "Input device";
 543                 break;
 544         case PCI_BASE_CLASS_DOCKING:
 545                 return "Docking station";
 546                 break;
 547         case PCI_BASE_CLASS_PROCESSOR:
 548                 return "Processor";
 549                 break;
 550         case PCI_BASE_CLASS_SERIAL:
 551                 return "Serial bus controller";
 552                 break;
 553         case PCI_BASE_CLASS_INTELLIGENT:
 554                 return "Intelligent controller";
 555                 break;
 556         case PCI_BASE_CLASS_SATELLITE:
 557                 return "Satellite controller";
 558                 break;
 559         case PCI_BASE_CLASS_CRYPT:
 560                 return "Cryptographic device";
 561                 break;
 562         case PCI_BASE_CLASS_SIGNAL_PROCESSING:
 563                 return "DSP";
 564                 break;
 565         case PCI_CLASS_OTHERS:
 566                 return "Does not fit any class";
 567                 break;
 568         default:
 569         return  "???";
 570                 break;
 571         };
 572 }
 573 #endif /* CONFIG_CMD_PCI || CONFIG_PCI_SCAN_SHOW */
 574
 575 int __pci_skip_dev(struct pci_controller *hose, pci_dev_t dev)
 576 {
 577         /*
 578          * Check if pci device should be skipped in configuration
 579          */
 580         if (dev == PCI_BDF(hose->first_busno, 0, 0)) {
 581 #if defined(CONFIG_PCI_CONFIG_HOST_BRIDGE) /* don't skip host bridge */
 582                 /*
 583                  * Only skip configuration if "pciconfighost" is not set
 584                  */
 585                 if (getenv("pciconfighost") == NULL)
 586                         return 1;
 587 #else
 588                 return 1;
 589 #endif
 590         }
 591
 592         return 0;
 593 }
 594 int pci_skip_dev(struct pci_controller *hose, pci_dev_t dev)
 595         __attribute__((weak, alias("__pci_skip_dev")));
 596
 597 #ifdef CONFIG_PCI_SCAN_SHOW
 598 int __pci_print_dev(struct pci_controller *hose, pci_dev_t dev)
 599 {
 600         if (dev == PCI_BDF(hose->first_busno, 0, 0))
 601                 return 0;
 602
 603         return 1;
 604 }
 605 int pci_print_dev(struct pci_controller *hose, pci_dev_t dev)
 606         __attribute__((weak, alias("__pci_print_dev")));
 607 #endif /* CONFIG_PCI_SCAN_SHOW */
 608
 609 int pci_hose_scan_bus(struct pci_controller *hose, int bus)
 610 {
 611         unsigned int sub_bus, found_multi = 0;
 612         unsigned short vendor, device, class;
 613         unsigned char header_type;
 614 #ifndef CONFIG_PCI_PNP
 615         struct pci_config_table *cfg;
 616 #endif
 617         pci_dev_t dev;
 618 #ifdef CONFIG_PCI_SCAN_SHOW
 619         static int indent = 0;
 620 #endif
 621
 622         sub_bus = bus;
 623
 624         for (dev =  PCI_BDF(bus,0,0);
 625              dev <  PCI_BDF(bus, PCI_MAX_PCI_DEVICES - 1,
 626                                 PCI_MAX_PCI_FUNCTIONS - 1);
 627              dev += PCI_BDF(0, 0, 1)) {
 628
 629                 if (pci_skip_dev(hose, dev))
 630                         continue;
 631
 632                 if (PCI_FUNC(dev) && !found_multi)
 633                         continue;
 634
 635                 pci_hose_read_config_byte(hose, dev, PCI_HEADER_TYPE, &header_type);
 636
 637                 pci_hose_read_config_word(hose, dev, PCI_VENDOR_ID, &vendor);
 638
 639                 if (vendor == 0xffff || vendor == 0x0000)
 640                         continue;
 641
 642                 if (!PCI_FUNC(dev))
 643                         found_multi = header_type & 0x80;
 644
 645                 debug("PCI Scan: Found Bus %d, Device %d, Function %d\n",
 646                         PCI_BUS(dev), PCI_DEV(dev), PCI_FUNC(dev));
 647
 648                 pci_hose_read_config_word(hose, dev, PCI_DEVICE_ID, &device);
 649                 pci_hose_read_config_word(hose, dev, PCI_CLASS_DEVICE, &class);
 650
 651 #ifdef CONFIG_PCI_SCAN_SHOW
 652                 indent++;
 653
 654                 /* Print leading space, including bus indentation */
 655                 printf("%*c", indent + 1, ' ');
 656
 657                 if (pci_print_dev(hose, dev)) {
 658                         printf("%02x:%02x.%-*x - %04x:%04x - %s\n",
 659                                PCI_BUS(dev), PCI_DEV(dev), 6 - indent, PCI_FUNC(dev),
 660                                vendor, device, pci_class_str(class >> 8));
 661                 }
 662 #endif
 663
 664 #ifdef CONFIG_PCI_PNP
 665                 sub_bus = max(pciauto_config_device(hose, dev), sub_bus);
 666 #else
 667                 cfg = pci_find_config(hose, class, vendor, device,
 668                                       PCI_BUS(dev), PCI_DEV(dev), PCI_FUNC(dev));
 669                 if (cfg) {
 670                         cfg->config_device(hose, dev, cfg);
 671                         sub_bus = max(sub_bus, hose->current_busno);
 672                 }
 673 #endif
 674
 675 #ifdef CONFIG_PCI_SCAN_SHOW
 676                 indent--;
 677 #endif
 678
 679                 if (hose->fixup_irq)
 680                         hose->fixup_irq(hose, dev);
 681         }
 682
 683         return sub_bus;
 684 }
 685
 686 int pci_hose_scan(struct pci_controller *hose)
 687 {
 688 #if defined(CONFIG_PCI_BOOTDELAY)
 689         static int pcidelay_done;
 690         char *s;
 691         int i;
 692
 693         if (!pcidelay_done) {
 694                 /* wait "pcidelay" ms (if defined)... */
 695                 s = getenv("pcidelay");
 696                 if (s) {
 697                         int val = simple_strtoul(s, NULL, 10);
 698                         for (i = 0; i < val; i++)
 699                                 udelay(1000);
 700                 }
 701                 pcidelay_done = 1;
 702         }
 703 #endif /* CONFIG_PCI_BOOTDELAY */
 704
 705         /*
 706          * Start scan at current_busno.
 707          * PCIe will start scan at first_busno+1.
 708          */
 709         /* For legacy support, ensure current >= first */
 710         if (hose->first_busno > hose->current_busno)
 711                 hose->current_busno = hose->first_busno;
 712 #ifdef CONFIG_PCI_PNP
 713         pciauto_config_init(hose);
 714 #endif
 715         return pci_hose_scan_bus(hose, hose->current_busno);
 716 }
 717
 718 void pci_init(void)
 719 {
 720         hose_head = NULL;
 721
 722         /* now call board specific pci_init()... */
 723         pci_init_board();
 724 }
 725
 726 /* Returns the address of the requested capability structure within the
 727  * device's PCI configuration space or 0 in case the device does not
 728  * support it.
 729  * */
 730 int pci_hose_find_capability(struct pci_controller *hose, pci_dev_t dev,
 731                              int cap)
 732 {
 733         int pos;
 734         u8 hdr_type;
 735
 736         pci_hose_read_config_byte(hose, dev, PCI_HEADER_TYPE, &hdr_type);
 737
 738         pos = pci_hose_find_cap_start(hose, dev, hdr_type & 0x7F);
 739
 740         if (pos)
 741                 pos = pci_find_cap(hose, dev, pos, cap);
 742
 743         return pos;
 744 }
 745
 746 /* Find the header pointer to the Capabilities*/
 747 int pci_hose_find_cap_start(struct pci_controller *hose, pci_dev_t dev,
 748                             u8 hdr_type)
 749 {
 750         u16 status;
 751
 752         pci_hose_read_config_word(hose, dev, PCI_STATUS, &status);
 753
 754         if (!(status & PCI_STATUS_CAP_LIST))
 755                 return 0;
 756
 757         switch (hdr_type) {
 758         case PCI_HEADER_TYPE_NORMAL:
 759         case PCI_HEADER_TYPE_BRIDGE:
 760                 return PCI_CAPABILITY_LIST;
 761         case PCI_HEADER_TYPE_CARDBUS:
 762                 return PCI_CB_CAPABILITY_LIST;
 763         default:
 764                 return 0;
 765         }
 766 }
 767
 768 int pci_find_cap(struct pci_controller *hose, pci_dev_t dev, int pos, int cap)
 769 {
 770         int ttl = PCI_FIND_CAP_TTL;
 771         u8 id;
 772         u8 next_pos;
 773
 774         while (ttl--) {
 775                 pci_hose_read_config_byte(hose, dev, pos, &next_pos);
 776                 if (next_pos < CAP_START_POS)
 777                         break;
 778                 next_pos &= ~3;
 779                 pos = (int) next_pos;
 780                 pci_hose_read_config_byte(hose, dev,
 781                                           pos + PCI_CAP_LIST_ID, &id);
 782                 if (id == 0xff)
 783                         break;
 784                 if (id == cap)
 785                         return pos;
 786                 pos += PCI_CAP_LIST_NEXT;
 787         }
 788         return 0;
 789 }