1 /* 2 * Copyright (c) 2011 The Chromium OS Authors. 3 * SPDX-License-Identifier: GPL-2.0+ 4 */ 5 6 #ifndef USE_HOSTCC 7 #include <common.h> 8 #include <errno.h> 9 #include <serial.h> 10 #include <libfdt.h> 11 #include <fdtdec.h> 12 #include <asm/sections.h> 13 #include <linux/ctype.h> 14 15 DECLARE_GLOBAL_DATA_PTR; 16 17 /* 18 * Here are the type we know about. One day we might allow drivers to 19 * register. For now we just put them here. The COMPAT macro allows us to 20 * turn this into a sparse list later, and keeps the ID with the name. 21 */ 22 #define COMPAT(id, name) name 23 static const char * const compat_names[COMPAT_COUNT] = { 24 COMPAT(UNKNOWN, "<none>"), 25 COMPAT(NVIDIA_TEGRA20_USB, "nvidia,tegra20-ehci"), 26 COMPAT(NVIDIA_TEGRA30_USB, "nvidia,tegra30-ehci"), 27 COMPAT(NVIDIA_TEGRA114_USB, "nvidia,tegra114-ehci"), 28 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"), 29 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"), 30 COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"), 31 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"), 32 COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"), 33 COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"), 34 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"), 35 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"), 36 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"), 37 COMPAT(NVIDIA_TEGRA124_PCIE, "nvidia,tegra124-pcie"), 38 COMPAT(NVIDIA_TEGRA30_PCIE, "nvidia,tegra30-pcie"), 39 COMPAT(NVIDIA_TEGRA20_PCIE, "nvidia,tegra20-pcie"), 40 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"), 41 COMPAT(SMSC_LAN9215, "smsc,lan9215"), 42 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), 43 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), 44 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), 45 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), 46 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"), 47 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), 48 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"), 49 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), 50 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"), 51 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"), 52 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"), 53 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), 54 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), 55 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"), 56 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"), 57 COMPAT(GENERIC_SPI_FLASH, "spi-flash"), 58 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), 59 COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"), 60 COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645-tpm"), 61 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), 62 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"), 63 COMPAT(TI_TPS65090, "ti,tps65090"), 64 COMPAT(COMPAT_NXP_PTN3460, "nxp,ptn3460"), 65 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), 66 COMPAT(PARADE_PS8625, "parade,ps8625"), 67 COMPAT(INTEL_MICROCODE, "intel,microcode"), 68 COMPAT(MEMORY_SPD, "memory-spd"), 69 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"), 70 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"), 71 COMPAT(INTEL_GMA, "intel,gma"), 72 COMPAT(AMS_AS3722, "ams,as3722"), 73 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"), 74 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"), 75 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"), 76 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"), 77 }; 78 79 const char *fdtdec_get_compatible(enum fdt_compat_id id) 80 { 81 /* We allow reading of the 'unknown' ID for testing purposes */ 82 assert(id >= 0 && id < COMPAT_COUNT); 83 return compat_names[id]; 84 } 85 86 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 87 const char *prop_name, fdt_size_t *sizep) 88 { 89 const fdt_addr_t *cell; 90 int len; 91 92 debug("%s: %s: ", __func__, prop_name); 93 cell = fdt_getprop(blob, node, prop_name, &len); 94 if (cell && ((!sizep && len == sizeof(fdt_addr_t)) || 95 len == sizeof(fdt_addr_t) * 2)) { 96 fdt_addr_t addr = fdt_addr_to_cpu(*cell); 97 if (sizep) { 98 const fdt_size_t *size; 99 100 size = (fdt_size_t *)((char *)cell + 101 sizeof(fdt_addr_t)); 102 *sizep = fdt_size_to_cpu(*size); 103 debug("addr=%08lx, size=%08x\n", 104 (ulong)addr, *sizep); 105 } else { 106 debug("%08lx\n", (ulong)addr); 107 } 108 return addr; 109 } 110 debug("(not found)\n"); 111 return FDT_ADDR_T_NONE; 112 } 113 114 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 115 const char *prop_name) 116 { 117 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 118 } 119 120 #ifdef CONFIG_PCI 121 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 122 const char *prop_name, struct fdt_pci_addr *addr) 123 { 124 const u32 *cell; 125 int len; 126 int ret = -ENOENT; 127 128 debug("%s: %s: ", __func__, prop_name); 129 130 /* 131 * If we follow the pci bus bindings strictly, we should check 132 * the value of the node's parent node's #address-cells and 133 * #size-cells. They need to be 3 and 2 accordingly. However, 134 * for simplicity we skip the check here. 135 */ 136 cell = fdt_getprop(blob, node, prop_name, &len); 137 if (!cell) 138 goto fail; 139 140 if ((len % FDT_PCI_REG_SIZE) == 0) { 141 int num = len / FDT_PCI_REG_SIZE; 142 int i; 143 144 for (i = 0; i < num; i++) { 145 debug("pci address #%d: %08lx %08lx %08lx\n", i, 146 (ulong)fdt_addr_to_cpu(cell[0]), 147 (ulong)fdt_addr_to_cpu(cell[1]), 148 (ulong)fdt_addr_to_cpu(cell[2])); 149 if ((fdt_addr_to_cpu(*cell) & type) == type) { 150 addr->phys_hi = fdt_addr_to_cpu(cell[0]); 151 addr->phys_mid = fdt_addr_to_cpu(cell[1]); 152 addr->phys_lo = fdt_addr_to_cpu(cell[2]); 153 break; 154 } else { 155 cell += (FDT_PCI_ADDR_CELLS + 156 FDT_PCI_SIZE_CELLS); 157 } 158 } 159 160 if (i == num) { 161 ret = -ENXIO; 162 goto fail; 163 } 164 165 return 0; 166 } else { 167 ret = -EINVAL; 168 } 169 170 fail: 171 debug("(not found)\n"); 172 return ret; 173 } 174 175 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 176 { 177 const char *list, *end; 178 int len; 179 180 list = fdt_getprop(blob, node, "compatible", &len); 181 if (!list) 182 return -ENOENT; 183 184 end = list + len; 185 while (list < end) { 186 char *s; 187 188 len = strlen(list); 189 if (len >= strlen("pciVVVV,DDDD")) { 190 s = strstr(list, "pci"); 191 192 /* 193 * check if the string is something like pciVVVV,DDDD.RR 194 * or just pciVVVV,DDDD 195 */ 196 if (s && s[7] == ',' && 197 (s[12] == '.' || s[12] == 0)) { 198 s += 3; 199 *vendor = simple_strtol(s, NULL, 16); 200 201 s += 5; 202 *device = simple_strtol(s, NULL, 16); 203 204 return 0; 205 } 206 } else { 207 list += (len + 1); 208 } 209 } 210 211 return -ENOENT; 212 } 213 214 int fdtdec_get_pci_bdf(const void *blob, int node, 215 struct fdt_pci_addr *addr, pci_dev_t *bdf) 216 { 217 u16 dt_vendor, dt_device, vendor, device; 218 int ret; 219 220 /* get vendor id & device id from the compatible string */ 221 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device); 222 if (ret) 223 return ret; 224 225 /* extract the bdf from fdt_pci_addr */ 226 *bdf = addr->phys_hi & 0xffff00; 227 228 /* read vendor id & device id based on bdf */ 229 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor); 230 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device); 231 232 /* 233 * Note there are two places in the device tree to fully describe 234 * a pci device: one is via compatible string with a format of 235 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in 236 * the device node's reg address property. We read the vendor id 237 * and device id based on bdf and compare the values with the 238 * "VVVV,DDDD". If they are the same, then we are good to use bdf 239 * to read device's bar. But if they are different, we have to rely 240 * on the vendor id and device id extracted from the compatible 241 * string and locate the real bdf by pci_find_device(). This is 242 * because normally we may only know device's device number and 243 * function number when writing device tree. The bus number is 244 * dynamically assigned during the pci enumeration process. 245 */ 246 if ((dt_vendor != vendor) || (dt_device != device)) { 247 *bdf = pci_find_device(dt_vendor, dt_device, 0); 248 if (*bdf == -1) 249 return -ENODEV; 250 } 251 252 return 0; 253 } 254 255 int fdtdec_get_pci_bar32(const void *blob, int node, 256 struct fdt_pci_addr *addr, u32 *bar) 257 { 258 pci_dev_t bdf; 259 int barnum; 260 int ret; 261 262 /* get pci devices's bdf */ 263 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf); 264 if (ret) 265 return ret; 266 267 /* extract the bar number from fdt_pci_addr */ 268 barnum = addr->phys_hi & 0xff; 269 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) 270 return -EINVAL; 271 272 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; 273 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum); 274 275 return 0; 276 } 277 #endif 278 279 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 280 uint64_t default_val) 281 { 282 const uint64_t *cell64; 283 int length; 284 285 cell64 = fdt_getprop(blob, node, prop_name, &length); 286 if (!cell64 || length < sizeof(*cell64)) 287 return default_val; 288 289 return fdt64_to_cpu(*cell64); 290 } 291 292 int fdtdec_get_is_enabled(const void *blob, int node) 293 { 294 const char *cell; 295 296 /* 297 * It should say "okay", so only allow that. Some fdts use "ok" but 298 * this is a bug. Please fix your device tree source file. See here 299 * for discussion: 300 * 301 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 302 */ 303 cell = fdt_getprop(blob, node, "status", NULL); 304 if (cell) 305 return 0 == strcmp(cell, "okay"); 306 return 1; 307 } 308 309 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 310 { 311 enum fdt_compat_id id; 312 313 /* Search our drivers */ 314 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 315 if (0 == fdt_node_check_compatible(blob, node, 316 compat_names[id])) 317 return id; 318 return COMPAT_UNKNOWN; 319 } 320 321 int fdtdec_next_compatible(const void *blob, int node, 322 enum fdt_compat_id id) 323 { 324 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 325 } 326 327 int fdtdec_next_compatible_subnode(const void *blob, int node, 328 enum fdt_compat_id id, int *depthp) 329 { 330 do { 331 node = fdt_next_node(blob, node, depthp); 332 } while (*depthp > 1); 333 334 /* If this is a direct subnode, and compatible, return it */ 335 if (*depthp == 1 && 0 == fdt_node_check_compatible( 336 blob, node, compat_names[id])) 337 return node; 338 339 return -FDT_ERR_NOTFOUND; 340 } 341 342 int fdtdec_next_alias(const void *blob, const char *name, 343 enum fdt_compat_id id, int *upto) 344 { 345 #define MAX_STR_LEN 20 346 char str[MAX_STR_LEN + 20]; 347 int node, err; 348 349 /* snprintf() is not available */ 350 assert(strlen(name) < MAX_STR_LEN); 351 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 352 node = fdt_path_offset(blob, str); 353 if (node < 0) 354 return node; 355 err = fdt_node_check_compatible(blob, node, compat_names[id]); 356 if (err < 0) 357 return err; 358 if (err) 359 return -FDT_ERR_NOTFOUND; 360 (*upto)++; 361 return node; 362 } 363 364 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 365 enum fdt_compat_id id, int *node_list, int maxcount) 366 { 367 memset(node_list, '\0', sizeof(*node_list) * maxcount); 368 369 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 370 } 371 372 /* TODO: Can we tighten this code up a little? */ 373 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 374 enum fdt_compat_id id, int *node_list, int maxcount) 375 { 376 int name_len = strlen(name); 377 int nodes[maxcount]; 378 int num_found = 0; 379 int offset, node; 380 int alias_node; 381 int count; 382 int i, j; 383 384 /* find the alias node if present */ 385 alias_node = fdt_path_offset(blob, "/aliases"); 386 387 /* 388 * start with nothing, and we can assume that the root node can't 389 * match 390 */ 391 memset(nodes, '\0', sizeof(nodes)); 392 393 /* First find all the compatible nodes */ 394 for (node = count = 0; node >= 0 && count < maxcount;) { 395 node = fdtdec_next_compatible(blob, node, id); 396 if (node >= 0) 397 nodes[count++] = node; 398 } 399 if (node >= 0) 400 debug("%s: warning: maxcount exceeded with alias '%s'\n", 401 __func__, name); 402 403 /* Now find all the aliases */ 404 for (offset = fdt_first_property_offset(blob, alias_node); 405 offset > 0; 406 offset = fdt_next_property_offset(blob, offset)) { 407 const struct fdt_property *prop; 408 const char *path; 409 int number; 410 int found; 411 412 node = 0; 413 prop = fdt_get_property_by_offset(blob, offset, NULL); 414 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 415 if (prop->len && 0 == strncmp(path, name, name_len)) 416 node = fdt_path_offset(blob, prop->data); 417 if (node <= 0) 418 continue; 419 420 /* Get the alias number */ 421 number = simple_strtoul(path + name_len, NULL, 10); 422 if (number < 0 || number >= maxcount) { 423 debug("%s: warning: alias '%s' is out of range\n", 424 __func__, path); 425 continue; 426 } 427 428 /* Make sure the node we found is actually in our list! */ 429 found = -1; 430 for (j = 0; j < count; j++) 431 if (nodes[j] == node) { 432 found = j; 433 break; 434 } 435 436 if (found == -1) { 437 debug("%s: warning: alias '%s' points to a node " 438 "'%s' that is missing or is not compatible " 439 " with '%s'\n", __func__, path, 440 fdt_get_name(blob, node, NULL), 441 compat_names[id]); 442 continue; 443 } 444 445 /* 446 * Add this node to our list in the right place, and mark 447 * it as done. 448 */ 449 if (fdtdec_get_is_enabled(blob, node)) { 450 if (node_list[number]) { 451 debug("%s: warning: alias '%s' requires that " 452 "a node be placed in the list in a " 453 "position which is already filled by " 454 "node '%s'\n", __func__, path, 455 fdt_get_name(blob, node, NULL)); 456 continue; 457 } 458 node_list[number] = node; 459 if (number >= num_found) 460 num_found = number + 1; 461 } 462 nodes[found] = 0; 463 } 464 465 /* Add any nodes not mentioned by an alias */ 466 for (i = j = 0; i < maxcount; i++) { 467 if (!node_list[i]) { 468 for (; j < maxcount; j++) 469 if (nodes[j] && 470 fdtdec_get_is_enabled(blob, nodes[j])) 471 break; 472 473 /* Have we run out of nodes to add? */ 474 if (j == maxcount) 475 break; 476 477 assert(!node_list[i]); 478 node_list[i] = nodes[j++]; 479 if (i >= num_found) 480 num_found = i + 1; 481 } 482 } 483 484 return num_found; 485 } 486 487 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 488 int *seqp) 489 { 490 int base_len = strlen(base); 491 const char *find_name; 492 int find_namelen; 493 int prop_offset; 494 int aliases; 495 496 find_name = fdt_get_name(blob, offset, &find_namelen); 497 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 498 499 aliases = fdt_path_offset(blob, "/aliases"); 500 for (prop_offset = fdt_first_property_offset(blob, aliases); 501 prop_offset > 0; 502 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 503 const char *prop; 504 const char *name; 505 const char *slash; 506 const char *p; 507 int len; 508 509 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 510 debug(" - %s, %s\n", name, prop); 511 if (len < find_namelen || *prop != '/' || prop[len - 1] || 512 strncmp(name, base, base_len)) 513 continue; 514 515 slash = strrchr(prop, '/'); 516 if (strcmp(slash + 1, find_name)) 517 continue; 518 for (p = name + strlen(name) - 1; p > name; p--) { 519 if (!isdigit(*p)) { 520 *seqp = simple_strtoul(p + 1, NULL, 10); 521 debug("Found seq %d\n", *seqp); 522 return 0; 523 } 524 } 525 } 526 527 debug("Not found\n"); 528 return -ENOENT; 529 } 530 531 int fdtdec_get_chosen_node(const void *blob, const char *name) 532 { 533 const char *prop; 534 int chosen_node; 535 int len; 536 537 if (!blob) 538 return -FDT_ERR_NOTFOUND; 539 chosen_node = fdt_path_offset(blob, "/chosen"); 540 prop = fdt_getprop(blob, chosen_node, name, &len); 541 if (!prop) 542 return -FDT_ERR_NOTFOUND; 543 return fdt_path_offset(blob, prop); 544 } 545 546 int fdtdec_check_fdt(void) 547 { 548 /* 549 * We must have an FDT, but we cannot panic() yet since the console 550 * is not ready. So for now, just assert(). Boards which need an early 551 * FDT (prior to console ready) will need to make their own 552 * arrangements and do their own checks. 553 */ 554 assert(!fdtdec_prepare_fdt()); 555 return 0; 556 } 557 558 /* 559 * This function is a little odd in that it accesses global data. At some 560 * point if the architecture board.c files merge this will make more sense. 561 * Even now, it is common code. 562 */ 563 int fdtdec_prepare_fdt(void) 564 { 565 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 566 fdt_check_header(gd->fdt_blob)) { 567 #ifdef CONFIG_SPL_BUILD 568 puts("Missing DTB\n"); 569 #else 570 puts("No valid device tree binary found - please append one to U-Boot binary, use u-boot-dtb.bin or define CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n"); 571 #endif 572 return -1; 573 } 574 return 0; 575 } 576 577 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 578 { 579 const u32 *phandle; 580 int lookup; 581 582 debug("%s: %s\n", __func__, prop_name); 583 phandle = fdt_getprop(blob, node, prop_name, NULL); 584 if (!phandle) 585 return -FDT_ERR_NOTFOUND; 586 587 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 588 return lookup; 589 } 590 591 /** 592 * Look up a property in a node and check that it has a minimum length. 593 * 594 * @param blob FDT blob 595 * @param node node to examine 596 * @param prop_name name of property to find 597 * @param min_len minimum property length in bytes 598 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 599 found, or -FDT_ERR_BADLAYOUT if not enough data 600 * @return pointer to cell, which is only valid if err == 0 601 */ 602 static const void *get_prop_check_min_len(const void *blob, int node, 603 const char *prop_name, int min_len, int *err) 604 { 605 const void *cell; 606 int len; 607 608 debug("%s: %s\n", __func__, prop_name); 609 cell = fdt_getprop(blob, node, prop_name, &len); 610 if (!cell) 611 *err = -FDT_ERR_NOTFOUND; 612 else if (len < min_len) 613 *err = -FDT_ERR_BADLAYOUT; 614 else 615 *err = 0; 616 return cell; 617 } 618 619 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 620 u32 *array, int count) 621 { 622 const u32 *cell; 623 int i, err = 0; 624 625 debug("%s: %s\n", __func__, prop_name); 626 cell = get_prop_check_min_len(blob, node, prop_name, 627 sizeof(u32) * count, &err); 628 if (!err) { 629 for (i = 0; i < count; i++) 630 array[i] = fdt32_to_cpu(cell[i]); 631 } 632 return err; 633 } 634 635 int fdtdec_get_int_array_count(const void *blob, int node, 636 const char *prop_name, u32 *array, int count) 637 { 638 const u32 *cell; 639 int len, elems; 640 int i; 641 642 debug("%s: %s\n", __func__, prop_name); 643 cell = fdt_getprop(blob, node, prop_name, &len); 644 if (!cell) 645 return -FDT_ERR_NOTFOUND; 646 elems = len / sizeof(u32); 647 if (count > elems) 648 count = elems; 649 for (i = 0; i < count; i++) 650 array[i] = fdt32_to_cpu(cell[i]); 651 652 return count; 653 } 654 655 const u32 *fdtdec_locate_array(const void *blob, int node, 656 const char *prop_name, int count) 657 { 658 const u32 *cell; 659 int err; 660 661 cell = get_prop_check_min_len(blob, node, prop_name, 662 sizeof(u32) * count, &err); 663 return err ? NULL : cell; 664 } 665 666 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 667 { 668 const s32 *cell; 669 int len; 670 671 debug("%s: %s\n", __func__, prop_name); 672 cell = fdt_getprop(blob, node, prop_name, &len); 673 return cell != NULL; 674 } 675 676 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 677 const char *list_name, 678 const char *cells_name, 679 int cell_count, int index, 680 struct fdtdec_phandle_args *out_args) 681 { 682 const __be32 *list, *list_end; 683 int rc = 0, size, cur_index = 0; 684 uint32_t count = 0; 685 int node = -1; 686 int phandle; 687 688 /* Retrieve the phandle list property */ 689 list = fdt_getprop(blob, src_node, list_name, &size); 690 if (!list) 691 return -ENOENT; 692 list_end = list + size / sizeof(*list); 693 694 /* Loop over the phandles until all the requested entry is found */ 695 while (list < list_end) { 696 rc = -EINVAL; 697 count = 0; 698 699 /* 700 * If phandle is 0, then it is an empty entry with no 701 * arguments. Skip forward to the next entry. 702 */ 703 phandle = be32_to_cpup(list++); 704 if (phandle) { 705 /* 706 * Find the provider node and parse the #*-cells 707 * property to determine the argument length. 708 * 709 * This is not needed if the cell count is hard-coded 710 * (i.e. cells_name not set, but cell_count is set), 711 * except when we're going to return the found node 712 * below. 713 */ 714 if (cells_name || cur_index == index) { 715 node = fdt_node_offset_by_phandle(blob, 716 phandle); 717 if (!node) { 718 debug("%s: could not find phandle\n", 719 fdt_get_name(blob, src_node, 720 NULL)); 721 goto err; 722 } 723 } 724 725 if (cells_name) { 726 count = fdtdec_get_int(blob, node, cells_name, 727 -1); 728 if (count == -1) { 729 debug("%s: could not get %s for %s\n", 730 fdt_get_name(blob, src_node, 731 NULL), 732 cells_name, 733 fdt_get_name(blob, node, 734 NULL)); 735 goto err; 736 } 737 } else { 738 count = cell_count; 739 } 740 741 /* 742 * Make sure that the arguments actually fit in the 743 * remaining property data length 744 */ 745 if (list + count > list_end) { 746 debug("%s: arguments longer than property\n", 747 fdt_get_name(blob, src_node, NULL)); 748 goto err; 749 } 750 } 751 752 /* 753 * All of the error cases above bail out of the loop, so at 754 * this point, the parsing is successful. If the requested 755 * index matches, then fill the out_args structure and return, 756 * or return -ENOENT for an empty entry. 757 */ 758 rc = -ENOENT; 759 if (cur_index == index) { 760 if (!phandle) 761 goto err; 762 763 if (out_args) { 764 int i; 765 766 if (count > MAX_PHANDLE_ARGS) { 767 debug("%s: too many arguments %d\n", 768 fdt_get_name(blob, src_node, 769 NULL), count); 770 count = MAX_PHANDLE_ARGS; 771 } 772 out_args->node = node; 773 out_args->args_count = count; 774 for (i = 0; i < count; i++) { 775 out_args->args[i] = 776 be32_to_cpup(list++); 777 } 778 } 779 780 /* Found it! return success */ 781 return 0; 782 } 783 784 node = -1; 785 list += count; 786 cur_index++; 787 } 788 789 /* 790 * Result will be one of: 791 * -ENOENT : index is for empty phandle 792 * -EINVAL : parsing error on data 793 * [1..n] : Number of phandle (count mode; when index = -1) 794 */ 795 rc = index < 0 ? cur_index : -ENOENT; 796 err: 797 return rc; 798 } 799 800 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 801 u8 *array, int count) 802 { 803 const u8 *cell; 804 int err; 805 806 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 807 if (!err) 808 memcpy(array, cell, count); 809 return err; 810 } 811 812 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 813 const char *prop_name, int count) 814 { 815 const u8 *cell; 816 int err; 817 818 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 819 if (err) 820 return NULL; 821 return cell; 822 } 823 824 int fdtdec_get_config_int(const void *blob, const char *prop_name, 825 int default_val) 826 { 827 int config_node; 828 829 debug("%s: %s\n", __func__, prop_name); 830 config_node = fdt_path_offset(blob, "/config"); 831 if (config_node < 0) 832 return default_val; 833 return fdtdec_get_int(blob, config_node, prop_name, default_val); 834 } 835 836 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 837 { 838 int config_node; 839 const void *prop; 840 841 debug("%s: %s\n", __func__, prop_name); 842 config_node = fdt_path_offset(blob, "/config"); 843 if (config_node < 0) 844 return 0; 845 prop = fdt_get_property(blob, config_node, prop_name, NULL); 846 847 return prop != NULL; 848 } 849 850 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 851 { 852 const char *nodep; 853 int nodeoffset; 854 int len; 855 856 debug("%s: %s\n", __func__, prop_name); 857 nodeoffset = fdt_path_offset(blob, "/config"); 858 if (nodeoffset < 0) 859 return NULL; 860 861 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 862 if (!nodep) 863 return NULL; 864 865 return (char *)nodep; 866 } 867 868 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 869 fdt_addr_t *basep, fdt_size_t *sizep) 870 { 871 const fdt_addr_t *cell; 872 int len; 873 874 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 875 prop_name); 876 cell = fdt_getprop(blob, node, prop_name, &len); 877 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 878 debug("cell=%p, len=%d\n", cell, len); 879 return -1; 880 } 881 882 *basep = fdt_addr_to_cpu(*cell); 883 *sizep = fdt_size_to_cpu(cell[1]); 884 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 885 (ulong)*sizep); 886 887 return 0; 888 } 889 890 /** 891 * Read a flash entry from the fdt 892 * 893 * @param blob FDT blob 894 * @param node Offset of node to read 895 * @param name Name of node being read 896 * @param entry Place to put offset and size of this node 897 * @return 0 if ok, -ve on error 898 */ 899 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 900 struct fmap_entry *entry) 901 { 902 const char *prop; 903 u32 reg[2]; 904 905 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 906 debug("Node '%s' has bad/missing 'reg' property\n", name); 907 return -FDT_ERR_NOTFOUND; 908 } 909 entry->offset = reg[0]; 910 entry->length = reg[1]; 911 entry->used = fdtdec_get_int(blob, node, "used", entry->length); 912 prop = fdt_getprop(blob, node, "compress", NULL); 913 entry->compress_algo = prop && !strcmp(prop, "lzo") ? 914 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; 915 prop = fdt_getprop(blob, node, "hash", &entry->hash_size); 916 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; 917 entry->hash = (uint8_t *)prop; 918 919 return 0; 920 } 921 922 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 923 { 924 u64 number = 0; 925 926 while (cells--) 927 number = (number << 32) | fdt32_to_cpu(*ptr++); 928 929 return number; 930 } 931 932 int fdt_get_resource(const void *fdt, int node, const char *property, 933 unsigned int index, struct fdt_resource *res) 934 { 935 const fdt32_t *ptr, *end; 936 int na, ns, len, parent; 937 unsigned int i = 0; 938 939 parent = fdt_parent_offset(fdt, node); 940 if (parent < 0) 941 return parent; 942 943 na = fdt_address_cells(fdt, parent); 944 ns = fdt_size_cells(fdt, parent); 945 946 ptr = fdt_getprop(fdt, node, property, &len); 947 if (!ptr) 948 return len; 949 950 end = ptr + len / sizeof(*ptr); 951 952 while (ptr + na + ns <= end) { 953 if (i == index) { 954 res->start = res->end = fdtdec_get_number(ptr, na); 955 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 956 return 0; 957 } 958 959 ptr += na + ns; 960 i++; 961 } 962 963 return -FDT_ERR_NOTFOUND; 964 } 965 966 int fdt_get_named_resource(const void *fdt, int node, const char *property, 967 const char *prop_names, const char *name, 968 struct fdt_resource *res) 969 { 970 int index; 971 972 index = fdt_find_string(fdt, node, prop_names, name); 973 if (index < 0) 974 return index; 975 976 return fdt_get_resource(fdt, node, property, index, res); 977 } 978 979 int fdtdec_decode_memory_region(const void *blob, int config_node, 980 const char *mem_type, const char *suffix, 981 fdt_addr_t *basep, fdt_size_t *sizep) 982 { 983 char prop_name[50]; 984 const char *mem; 985 fdt_size_t size, offset_size; 986 fdt_addr_t base, offset; 987 int node; 988 989 if (config_node == -1) { 990 config_node = fdt_path_offset(blob, "/config"); 991 if (config_node < 0) { 992 debug("%s: Cannot find /config node\n", __func__); 993 return -ENOENT; 994 } 995 } 996 if (!suffix) 997 suffix = ""; 998 999 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 1000 suffix); 1001 mem = fdt_getprop(blob, config_node, prop_name, NULL); 1002 if (!mem) { 1003 debug("%s: No memory type for '%s', using /memory\n", __func__, 1004 prop_name); 1005 mem = "/memory"; 1006 } 1007 1008 node = fdt_path_offset(blob, mem); 1009 if (node < 0) { 1010 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 1011 fdt_strerror(node)); 1012 return -ENOENT; 1013 } 1014 1015 /* 1016 * Not strictly correct - the memory may have multiple banks. We just 1017 * use the first 1018 */ 1019 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 1020 debug("%s: Failed to decode memory region %s\n", __func__, 1021 mem); 1022 return -EINVAL; 1023 } 1024 1025 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 1026 suffix); 1027 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 1028 &offset_size)) { 1029 debug("%s: Failed to decode memory region '%s'\n", __func__, 1030 prop_name); 1031 return -EINVAL; 1032 } 1033 1034 *basep = base + offset; 1035 *sizep = offset_size; 1036 1037 return 0; 1038 } 1039 1040 int fdtdec_setup(void) 1041 { 1042 #ifdef CONFIG_OF_CONTROL 1043 # ifdef CONFIG_OF_EMBED 1044 /* Get a pointer to the FDT */ 1045 gd->fdt_blob = __dtb_dt_begin; 1046 # elif defined CONFIG_OF_SEPARATE 1047 # ifdef CONFIG_SPL_BUILD 1048 /* FDT is at end of BSS */ 1049 gd->fdt_blob = (ulong *)&__bss_end; 1050 # else 1051 /* FDT is at end of image */ 1052 gd->fdt_blob = (ulong *)&_end; 1053 #endif 1054 # elif defined(CONFIG_OF_HOSTFILE) 1055 if (sandbox_read_fdt_from_file()) { 1056 puts("Failed to read control FDT\n"); 1057 return -1; 1058 } 1059 # endif 1060 # ifndef CONFIG_SPL_BUILD 1061 /* Allow the early environment to override the fdt address */ 1062 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, 1063 (uintptr_t)gd->fdt_blob); 1064 # endif 1065 #endif 1066 return fdtdec_prepare_fdt(); 1067 } 1068 1069 #endif /* !USE_HOSTCC */ 1070