1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com> 4 * Andreas Heppel <aheppel@sysgo.de> 5 * 6 * (C) Copyright 2002 7 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 8 * Wolfgang Grandegger, DENX Software Engineering, wg@denx.de. 9 */ 10 11/* 12 * PCI routines 13 */ 14 15#include <common.h> 16#include <bootretry.h> 17#include <cli.h> 18#include <command.h> 19#include <console.h> 20#include <dm.h> 21#include <init.h> 22#include <asm/processor.h> 23#include <asm/io.h> 24#include <pci.h> 25 26struct pci_reg_info { 27 const char *name; 28 enum pci_size_t size; 29 u8 offset; 30}; 31 32static int pci_byte_size(enum pci_size_t size) 33{ 34 switch (size) { 35 case PCI_SIZE_8: 36 return 1; 37 case PCI_SIZE_16: 38 return 2; 39 case PCI_SIZE_32: 40 default: 41 return 4; 42 } 43} 44 45static int pci_field_width(enum pci_size_t size) 46{ 47 return pci_byte_size(size) * 2; 48} 49 50static void pci_show_regs(struct udevice *dev, struct pci_reg_info *regs) 51{ 52 for (; regs->name; regs++) { 53 unsigned long val; 54 55 dm_pci_read_config(dev, regs->offset, &val, regs->size); 56 printf(" %s =%*s%#.*lx\n", regs->name, 57 (int)(28 - strlen(regs->name)), "", 58 pci_field_width(regs->size), val); 59 } 60} 61 62static int pci_bar_show(struct udevice *dev) 63{ 64 u8 header_type; 65 int bar_cnt, bar_id, mem_type; 66 bool is_64, is_io; 67 u32 base_low, base_high; 68 u32 size_low, size_high; 69 u64 base, size; 70 u32 reg_addr; 71 int prefetchable; 72 73 dm_pci_read_config8(dev, PCI_HEADER_TYPE, &header_type); 74 header_type &= 0x7f; 75 76 if (header_type == PCI_HEADER_TYPE_CARDBUS) { 77 printf("CardBus doesn't support BARs\n"); 78 return -ENOSYS; 79 } else if (header_type != PCI_HEADER_TYPE_NORMAL && 80 header_type != PCI_HEADER_TYPE_BRIDGE) { 81 printf("unknown header type\n"); 82 return -ENOSYS; 83 } 84 85 bar_cnt = (header_type == PCI_HEADER_TYPE_NORMAL) ? 6 : 2; 86 87 printf("ID Base Size Width Type\n"); 88 printf("----------------------------------------------------------\n"); 89 90 bar_id = 0; 91 reg_addr = PCI_BASE_ADDRESS_0; 92 while (bar_cnt) { 93 dm_pci_read_config32(dev, reg_addr, &base_low); 94 dm_pci_write_config32(dev, reg_addr, 0xffffffff); 95 dm_pci_read_config32(dev, reg_addr, &size_low); 96 dm_pci_write_config32(dev, reg_addr, base_low); 97 reg_addr += 4; 98 99 base = base_low & ~0xf; 100 size = size_low & ~0xf; 101 base_high = 0x0; 102 size_high = 0xffffffff; 103 is_64 = 0; 104 prefetchable = base_low & PCI_BASE_ADDRESS_MEM_PREFETCH; 105 is_io = base_low & PCI_BASE_ADDRESS_SPACE_IO; 106 mem_type = base_low & PCI_BASE_ADDRESS_MEM_TYPE_MASK; 107 108 if (mem_type == PCI_BASE_ADDRESS_MEM_TYPE_64) { 109 dm_pci_read_config32(dev, reg_addr, &base_high); 110 dm_pci_write_config32(dev, reg_addr, 0xffffffff); 111 dm_pci_read_config32(dev, reg_addr, &size_high); 112 dm_pci_write_config32(dev, reg_addr, base_high); 113 bar_cnt--; 114 reg_addr += 4; 115 is_64 = 1; 116 } 117 118 base = base | ((u64)base_high << 32); 119 size = size | ((u64)size_high << 32); 120 121 if ((!is_64 && size_low) || (is_64 && size)) { 122 size = ~size + 1; 123 printf(" %d %#018llx %#018llx %d %s %s\n", 124 bar_id, (unsigned long long)base, 125 (unsigned long long)size, is_64 ? 64 : 32, 126 is_io ? "I/O" : "MEM", 127 prefetchable ? "Prefetchable" : ""); 128 } 129 130 bar_id++; 131 bar_cnt--; 132 } 133 134 return 0; 135} 136 137static struct pci_reg_info regs_start[] = { 138 { "vendor ID", PCI_SIZE_16, PCI_VENDOR_ID }, 139 { "device ID", PCI_SIZE_16, PCI_DEVICE_ID }, 140 { "command register ID", PCI_SIZE_16, PCI_COMMAND }, 141 { "status register", PCI_SIZE_16, PCI_STATUS }, 142 { "revision ID", PCI_SIZE_8, PCI_REVISION_ID }, 143 {}, 144}; 145 146static struct pci_reg_info regs_rest[] = { 147 { "sub class code", PCI_SIZE_8, PCI_CLASS_SUB_CODE }, 148 { "programming interface", PCI_SIZE_8, PCI_CLASS_PROG }, 149 { "cache line", PCI_SIZE_8, PCI_CACHE_LINE_SIZE }, 150 { "latency time", PCI_SIZE_8, PCI_LATENCY_TIMER }, 151 { "header type", PCI_SIZE_8, PCI_HEADER_TYPE }, 152 { "BIST", PCI_SIZE_8, PCI_BIST }, 153 { "base address 0", PCI_SIZE_32, PCI_BASE_ADDRESS_0 }, 154 {}, 155}; 156 157static struct pci_reg_info regs_normal[] = { 158 { "base address 1", PCI_SIZE_32, PCI_BASE_ADDRESS_1 }, 159 { "base address 2", PCI_SIZE_32, PCI_BASE_ADDRESS_2 }, 160 { "base address 3", PCI_SIZE_32, PCI_BASE_ADDRESS_3 }, 161 { "base address 4", PCI_SIZE_32, PCI_BASE_ADDRESS_4 }, 162 { "base address 5", PCI_SIZE_32, PCI_BASE_ADDRESS_5 }, 163 { "cardBus CIS pointer", PCI_SIZE_32, PCI_CARDBUS_CIS }, 164 { "sub system vendor ID", PCI_SIZE_16, PCI_SUBSYSTEM_VENDOR_ID }, 165 { "sub system ID", PCI_SIZE_16, PCI_SUBSYSTEM_ID }, 166 { "expansion ROM base address", PCI_SIZE_32, PCI_ROM_ADDRESS }, 167 { "interrupt line", PCI_SIZE_8, PCI_INTERRUPT_LINE }, 168 { "interrupt pin", PCI_SIZE_8, PCI_INTERRUPT_PIN }, 169 { "min Grant", PCI_SIZE_8, PCI_MIN_GNT }, 170 { "max Latency", PCI_SIZE_8, PCI_MAX_LAT }, 171 {}, 172}; 173 174static struct pci_reg_info regs_bridge[] = { 175 { "base address 1", PCI_SIZE_32, PCI_BASE_ADDRESS_1 }, 176 { "primary bus number", PCI_SIZE_8, PCI_PRIMARY_BUS }, 177 { "secondary bus number", PCI_SIZE_8, PCI_SECONDARY_BUS }, 178 { "subordinate bus number", PCI_SIZE_8, PCI_SUBORDINATE_BUS }, 179 { "secondary latency timer", PCI_SIZE_8, PCI_SEC_LATENCY_TIMER }, 180 { "IO base", PCI_SIZE_8, PCI_IO_BASE }, 181 { "IO limit", PCI_SIZE_8, PCI_IO_LIMIT }, 182 { "secondary status", PCI_SIZE_16, PCI_SEC_STATUS }, 183 { "memory base", PCI_SIZE_16, PCI_MEMORY_BASE }, 184 { "memory limit", PCI_SIZE_16, PCI_MEMORY_LIMIT }, 185 { "prefetch memory base", PCI_SIZE_16, PCI_PREF_MEMORY_BASE }, 186 { "prefetch memory limit", PCI_SIZE_16, PCI_PREF_MEMORY_LIMIT }, 187 { "prefetch memory base upper", PCI_SIZE_32, PCI_PREF_BASE_UPPER32 }, 188 { "prefetch memory limit upper", PCI_SIZE_32, PCI_PREF_LIMIT_UPPER32 }, 189 { "IO base upper 16 bits", PCI_SIZE_16, PCI_IO_BASE_UPPER16 }, 190 { "IO limit upper 16 bits", PCI_SIZE_16, PCI_IO_LIMIT_UPPER16 }, 191 { "expansion ROM base address", PCI_SIZE_32, PCI_ROM_ADDRESS1 }, 192 { "interrupt line", PCI_SIZE_8, PCI_INTERRUPT_LINE }, 193 { "interrupt pin", PCI_SIZE_8, PCI_INTERRUPT_PIN }, 194 { "bridge control", PCI_SIZE_16, PCI_BRIDGE_CONTROL }, 195 {}, 196}; 197 198static struct pci_reg_info regs_cardbus[] = { 199 { "capabilities", PCI_SIZE_8, PCI_CB_CAPABILITY_LIST }, 200 { "secondary status", PCI_SIZE_16, PCI_CB_SEC_STATUS }, 201 { "primary bus number", PCI_SIZE_8, PCI_CB_PRIMARY_BUS }, 202 { "CardBus number", PCI_SIZE_8, PCI_CB_CARD_BUS }, 203 { "subordinate bus number", PCI_SIZE_8, PCI_CB_SUBORDINATE_BUS }, 204 { "CardBus latency timer", PCI_SIZE_8, PCI_CB_LATENCY_TIMER }, 205 { "CardBus memory base 0", PCI_SIZE_32, PCI_CB_MEMORY_BASE_0 }, 206 { "CardBus memory limit 0", PCI_SIZE_32, PCI_CB_MEMORY_LIMIT_0 }, 207 { "CardBus memory base 1", PCI_SIZE_32, PCI_CB_MEMORY_BASE_1 }, 208 { "CardBus memory limit 1", PCI_SIZE_32, PCI_CB_MEMORY_LIMIT_1 }, 209 { "CardBus IO base 0", PCI_SIZE_16, PCI_CB_IO_BASE_0 }, 210 { "CardBus IO base high 0", PCI_SIZE_16, PCI_CB_IO_BASE_0_HI }, 211 { "CardBus IO limit 0", PCI_SIZE_16, PCI_CB_IO_LIMIT_0 }, 212 { "CardBus IO limit high 0", PCI_SIZE_16, PCI_CB_IO_LIMIT_0_HI }, 213 { "CardBus IO base 1", PCI_SIZE_16, PCI_CB_IO_BASE_1 }, 214 { "CardBus IO base high 1", PCI_SIZE_16, PCI_CB_IO_BASE_1_HI }, 215 { "CardBus IO limit 1", PCI_SIZE_16, PCI_CB_IO_LIMIT_1 }, 216 { "CardBus IO limit high 1", PCI_SIZE_16, PCI_CB_IO_LIMIT_1_HI }, 217 { "interrupt line", PCI_SIZE_8, PCI_INTERRUPT_LINE }, 218 { "interrupt pin", PCI_SIZE_8, PCI_INTERRUPT_PIN }, 219 { "bridge control", PCI_SIZE_16, PCI_CB_BRIDGE_CONTROL }, 220 { "subvendor ID", PCI_SIZE_16, PCI_CB_SUBSYSTEM_VENDOR_ID }, 221 { "subdevice ID", PCI_SIZE_16, PCI_CB_SUBSYSTEM_ID }, 222 { "PC Card 16bit base address", PCI_SIZE_32, PCI_CB_LEGACY_MODE_BASE }, 223 {}, 224}; 225 226/** 227 * pci_header_show() - Show the header of the specified PCI device. 228 * 229 * @dev: Bus+Device+Function number 230 */ 231static void pci_header_show(struct udevice *dev) 232{ 233 unsigned long class, header_type; 234 235 dm_pci_read_config(dev, PCI_CLASS_CODE, &class, PCI_SIZE_8); 236 dm_pci_read_config(dev, PCI_HEADER_TYPE, &header_type, PCI_SIZE_8); 237 pci_show_regs(dev, regs_start); 238 printf(" class code = 0x%.2x (%s)\n", (int)class, 239 pci_class_str(class)); 240 pci_show_regs(dev, regs_rest); 241 242 switch (header_type & 0x7f) { 243 case PCI_HEADER_TYPE_NORMAL: /* "normal" PCI device */ 244 pci_show_regs(dev, regs_normal); 245 break; 246 case PCI_HEADER_TYPE_BRIDGE: /* PCI-to-PCI bridge */ 247 pci_show_regs(dev, regs_bridge); 248 break; 249 case PCI_HEADER_TYPE_CARDBUS: /* PCI-to-CardBus bridge */ 250 pci_show_regs(dev, regs_cardbus); 251 break; 252 253 default: 254 printf("unknown header\n"); 255 break; 256 } 257} 258 259static void pciinfo_header(bool short_listing) 260{ 261 if (short_listing) { 262 printf("BusDevFun VendorId DeviceId Device Class Sub-Class\n"); 263 printf("_____________________________________________________________\n"); 264 } 265} 266 267/** 268 * pci_header_show_brief() - Show the short-form PCI device header 269 * 270 * Reads and prints the header of the specified PCI device in short form. 271 * 272 * @dev: PCI device to show 273 */ 274static void pci_header_show_brief(struct udevice *dev) 275{ 276 ulong vendor, device; 277 ulong class, subclass; 278 279 dm_pci_read_config(dev, PCI_VENDOR_ID, &vendor, PCI_SIZE_16); 280 dm_pci_read_config(dev, PCI_DEVICE_ID, &device, PCI_SIZE_16); 281 dm_pci_read_config(dev, PCI_CLASS_CODE, &class, PCI_SIZE_8); 282 dm_pci_read_config(dev, PCI_CLASS_SUB_CODE, &subclass, PCI_SIZE_8); 283 284 printf("0x%.4lx 0x%.4lx %-23s 0x%.2lx\n", 285 vendor, device, 286 pci_class_str(class), subclass); 287} 288 289static void pciinfo(struct udevice *bus, bool short_listing, bool multi) 290{ 291 struct udevice *dev; 292 293 if (!multi) 294 printf("Scanning PCI devices on bus %d\n", dev_seq(bus)); 295 296 if (!multi || dev_seq(bus) == 0) 297 pciinfo_header(short_listing); 298 299 for (device_find_first_child(bus, &dev); 300 dev; 301 device_find_next_child(&dev)) { 302 struct pci_child_plat *pplat; 303 304 pplat = dev_get_parent_plat(dev); 305 if (short_listing) { 306 printf("%02x.%02x.%02x ", dev_seq(bus), 307 PCI_DEV(pplat->devfn), PCI_FUNC(pplat->devfn)); 308 pci_header_show_brief(dev); 309 } else { 310 printf("\nFound PCI device %02x.%02x.%02x:\n", 311 dev_seq(bus), 312 PCI_DEV(pplat->devfn), PCI_FUNC(pplat->devfn)); 313 pci_header_show(dev); 314 } 315 } 316} 317 318/** 319 * get_pci_dev() - Convert the "bus.device.function" identifier into a number 320 * 321 * @name: Device string in the form "bus.device.function" where each is in hex 322 * Return: encoded pci_dev_t or -1 if the string was invalid 323 */ 324static pci_dev_t get_pci_dev(char *name) 325{ 326 char cnum[12]; 327 int len, i, iold, n; 328 int bdfs[3] = {0,0,0}; 329 330 len = strlen(name); 331 if (len > 8) 332 return -1; 333 for (i = 0, iold = 0, n = 0; i < len; i++) { 334 if (name[i] == '.') { 335 memcpy(cnum, &name[iold], i - iold); 336 cnum[i - iold] = '\0'; 337 bdfs[n++] = hextoul(cnum, NULL); 338 iold = i + 1; 339 } 340 } 341 strcpy(cnum, &name[iold]); 342 if (n == 0) 343 n = 1; 344 bdfs[n] = hextoul(cnum, NULL); 345 346 return PCI_BDF(bdfs[0], bdfs[1], bdfs[2]); 347} 348 349static int pci_cfg_display(struct udevice *dev, ulong addr, 350 enum pci_size_t size, ulong length) 351{ 352#define DISP_LINE_LEN 16 353 ulong i, nbytes, linebytes; 354 int byte_size; 355 int rc = 0; 356 357 byte_size = pci_byte_size(size); 358 if (length == 0) 359 length = 0x40 / byte_size; /* Standard PCI config space */ 360 361 if (addr >= 4096) 362 return 1; 363 364 /* Print the lines. 365 * once, and all accesses are with the specified bus width. 366 */ 367 nbytes = length * byte_size; 368 do { 369 printf("%08lx:", addr); 370 linebytes = (nbytes > DISP_LINE_LEN) ? DISP_LINE_LEN : nbytes; 371 for (i = 0; i < linebytes; i += byte_size) { 372 unsigned long val; 373 374 dm_pci_read_config(dev, addr, &val, size); 375 printf(" %0*lx", pci_field_width(size), val); 376 addr += byte_size; 377 } 378 printf("\n"); 379 nbytes -= linebytes; 380 if (ctrlc()) { 381 rc = 1; 382 break; 383 } 384 } while (nbytes > 0 && addr < 4096); 385 386 if (rc == 0 && nbytes > 0) 387 return 1; 388 389 return (rc); 390} 391 392static int pci_cfg_modify(struct udevice *dev, ulong addr, ulong size, 393 ulong value, int incrflag) 394{ 395 ulong i; 396 int nbytes; 397 ulong val; 398 399 if (addr >= 4096) 400 return 1; 401 402 /* Print the address, followed by value. Then accept input for 403 * the next value. A non-converted value exits. 404 */ 405 do { 406 printf("%08lx:", addr); 407 dm_pci_read_config(dev, addr, &val, size); 408 printf(" %0*lx", pci_field_width(size), val); 409 410 nbytes = cli_readline(" ? "); 411 if (nbytes == 0 || (nbytes == 1 && console_buffer[0] == '-')) { 412 /* <CR> pressed as only input, don't modify current 413 * location and move to next. "-" pressed will go back. 414 */ 415 if (incrflag) 416 addr += nbytes ? -size : size; 417 nbytes = 1; 418 /* good enough to not time out */ 419 bootretry_reset_cmd_timeout(); 420 } 421#ifdef CONFIG_BOOT_RETRY_TIME 422 else if (nbytes == -2) { 423 break; /* timed out, exit the command */ 424 } 425#endif 426 else { 427 char *endp; 428 i = hextoul(console_buffer, &endp); 429 nbytes = endp - console_buffer; 430 if (nbytes) { 431 /* good enough to not time out 432 */ 433 bootretry_reset_cmd_timeout(); 434 dm_pci_write_config(dev, addr, i, size); 435 if (incrflag) 436 addr += size; 437 } 438 } 439 } while (nbytes && addr < 4096); 440 441 if (nbytes) 442 return 1; 443 444 return 0; 445} 446 447static const struct pci_flag_info { 448 uint flag; 449 const char *name; 450} pci_flag_info[] = { 451 { PCI_REGION_IO, "io" }, 452 { PCI_REGION_PREFETCH, "prefetch" }, 453 { PCI_REGION_SYS_MEMORY, "sysmem" }, 454 { PCI_REGION_RO, "readonly" }, 455}; 456 457static void pci_show_regions(struct udevice *bus) 458{ 459 struct pci_controller *hose = dev_get_uclass_priv(pci_get_controller(bus)); 460 const struct pci_region *reg; 461 int i, j; 462 463 if (!hose) { 464 printf("Bus '%s' is not a PCI controller\n", bus->name); 465 return; 466 } 467 468 printf("Buses %02x-%02x\n", hose->first_busno, hose->last_busno); 469 printf("# %-18s %-18s %-18s %s\n", "Bus start", "Phys start", "Size", 470 "Flags"); 471 for (i = 0, reg = hose->regions; i < hose->region_count; i++, reg++) { 472 printf("%d %#018llx %#018llx %#018llx ", i, 473 (unsigned long long)reg->bus_start, 474 (unsigned long long)reg->phys_start, 475 (unsigned long long)reg->size); 476 if (!(reg->flags & PCI_REGION_TYPE)) 477 printf("mem "); 478 for (j = 0; j < ARRAY_SIZE(pci_flag_info); j++) { 479 if (reg->flags & pci_flag_info[j].flag) 480 printf("%s ", pci_flag_info[j].name); 481 } 482 printf("\n"); 483 } 484} 485 486/* PCI Configuration Space access commands 487 * 488 * Syntax: 489 * pci display[.b, .w, .l] bus.device.function} [addr] [len] 490 * pci next[.b, .w, .l] bus.device.function [addr] 491 * pci modify[.b, .w, .l] bus.device.function [addr] 492 * pci write[.b, .w, .l] bus.device.function addr value 493 */ 494static int do_pci(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) 495{ 496 ulong addr = 0, value = 0, cmd_size = 0; 497 enum pci_size_t size = PCI_SIZE_32; 498 struct udevice *dev, *bus; 499 int busnum = -1; 500 pci_dev_t bdf = 0; 501 char cmd = 's'; 502 int ret = 0; 503 char *endp; 504 505 if (argc > 1) 506 cmd = argv[1][0]; 507 508 switch (cmd) { 509 case 'd': /* display */ 510 case 'n': /* next */ 511 case 'm': /* modify */ 512 case 'w': /* write */ 513 /* Check for a size specification. */ 514 cmd_size = cmd_get_data_size(argv[1], 4); 515 size = (cmd_size == 4) ? PCI_SIZE_32 : cmd_size - 1; 516 if (argc > 3) 517 addr = hextoul(argv[3], NULL); 518 if (argc > 4) 519 value = hextoul(argv[4], NULL); 520 fallthrough; 521 case 'h': /* header */ 522 case 'b': /* bars */ 523 if (argc < 3) 524 goto usage; 525 if ((bdf = get_pci_dev(argv[2])) == -1) 526 return 1; 527 break; 528 case 'e': 529 pci_init(); 530 return 0; 531 case 'r': /* no break */ 532 default: /* scan bus */ 533 value = 1; /* short listing */ 534 if (argc > 1) { 535 if (cmd != 'r' && argv[argc-1][0] == 'l') { 536 value = 0; 537 argc--; 538 } 539 if (argc > 2 || (argc > 1 && cmd != 'r' && argv[1][0] != 's')) { 540 if (argv[argc - 1][0] != '*') { 541 busnum = hextoul(argv[argc - 1], &endp); 542 if (*endp) 543 goto usage; 544 } 545 argc--; 546 } 547 if (cmd == 'r' && argc > 2) 548 goto usage; 549 else if (cmd != 'r' && (argc > 2 || (argc == 2 && argv[1][0] != 's'))) 550 goto usage; 551 } 552 if (busnum == -1) { 553 if (cmd != 'r') { 554 for (busnum = 0; 555 uclass_get_device_by_seq(UCLASS_PCI, busnum, &bus) == 0; 556 busnum++) 557 pciinfo(bus, value, true); 558 } else { 559 for (busnum = 0; 560 uclass_get_device_by_seq(UCLASS_PCI, busnum, &bus) == 0; 561 busnum++) { 562 /* Regions are controller specific so skip non-root buses */ 563 if (device_is_on_pci_bus(bus)) 564 continue; 565 pci_show_regions(bus); 566 } 567 } 568 return 0; 569 } 570 ret = uclass_get_device_by_seq(UCLASS_PCI, busnum, &bus); 571 if (ret) { 572 printf("No such bus\n"); 573 return CMD_RET_FAILURE; 574 } 575 if (cmd == 'r') 576 pci_show_regions(bus); 577 else 578 pciinfo(bus, value, false); 579 return 0; 580 } 581 582 ret = dm_pci_bus_find_bdf(bdf, &dev); 583 if (ret) { 584 printf("No such device\n"); 585 return CMD_RET_FAILURE; 586 } 587 588 switch (argv[1][0]) { 589 case 'h': /* header */ 590 pci_header_show(dev); 591 break; 592 case 'd': /* display */ 593 return pci_cfg_display(dev, addr, size, value); 594 case 'n': /* next */ 595 if (argc < 4) 596 goto usage; 597 ret = pci_cfg_modify(dev, addr, size, value, 0); 598 break; 599 case 'm': /* modify */ 600 if (argc < 4) 601 goto usage; 602 ret = pci_cfg_modify(dev, addr, size, value, 1); 603 break; 604 case 'w': /* write */ 605 if (argc < 5) 606 goto usage; 607 ret = dm_pci_write_config(dev, addr, value, size); 608 break; 609 case 'b': /* bars */ 610 return pci_bar_show(dev); 611 default: 612 ret = CMD_RET_USAGE; 613 break; 614 } 615 616 return ret; 617 usage: 618 return CMD_RET_USAGE; 619} 620 621/***************************************************/ 622 623U_BOOT_LONGHELP(pci, 624 "[bus|*] [long]\n" 625 " - short or long list of PCI devices on bus 'bus'\n" 626 "pci enum\n" 627 " - Enumerate PCI buses\n" 628 "pci header b.d.f\n" 629 " - show header of PCI device 'bus.device.function'\n" 630 "pci bar b.d.f\n" 631 " - show BARs base and size for device b.d.f'\n" 632 "pci regions [bus|*]\n" 633 " - show PCI regions\n" 634 "pci display[.b, .w, .l] b.d.f [address] [# of objects]\n" 635 " - display PCI configuration space (CFG)\n" 636 "pci next[.b, .w, .l] b.d.f address\n" 637 " - modify, read and keep CFG address\n" 638 "pci modify[.b, .w, .l] b.d.f address\n" 639 " - modify, auto increment CFG address\n" 640 "pci write[.b, .w, .l] b.d.f address value\n" 641 " - write to CFG address"); 642 643U_BOOT_CMD( 644 pci, 5, 1, do_pci, 645 "list and access PCI Configuration Space", pci_help_text 646); 647