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 <linux/ctype.h> 13 14 DECLARE_GLOBAL_DATA_PTR; 15 16 /* 17 * Here are the type we know about. One day we might allow drivers to 18 * register. For now we just put them here. The COMPAT macro allows us to 19 * turn this into a sparse list later, and keeps the ID with the name. 20 */ 21 #define COMPAT(id, name) name 22 static const char * const compat_names[COMPAT_COUNT] = { 23 COMPAT(UNKNOWN, "<none>"), 24 COMPAT(NVIDIA_TEGRA20_USB, "nvidia,tegra20-ehci"), 25 COMPAT(NVIDIA_TEGRA30_USB, "nvidia,tegra30-ehci"), 26 COMPAT(NVIDIA_TEGRA114_USB, "nvidia,tegra114-ehci"), 27 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"), 28 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"), 29 COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"), 30 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"), 31 COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"), 32 COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"), 33 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"), 34 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"), 35 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"), 36 COMPAT(NVIDIA_TEGRA124_PCIE, "nvidia,tegra124-pcie"), 37 COMPAT(NVIDIA_TEGRA30_PCIE, "nvidia,tegra30-pcie"), 38 COMPAT(NVIDIA_TEGRA20_PCIE, "nvidia,tegra20-pcie"), 39 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"), 40 COMPAT(SMSC_LAN9215, "smsc,lan9215"), 41 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), 42 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), 43 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), 44 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), 45 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"), 46 COMPAT(SAMSUNG_EXYNOS_EHCI, "samsung,exynos-ehci"), 47 COMPAT(SAMSUNG_EXYNOS5_XHCI, "samsung,exynos5250-xhci"), 48 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), 49 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"), 50 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), 51 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"), 52 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"), 53 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"), 54 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), 55 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), 56 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"), 57 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"), 58 COMPAT(GENERIC_SPI_FLASH, "spi-flash"), 59 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), 60 COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"), 61 COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645-tpm"), 62 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), 63 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"), 64 COMPAT(TI_TPS65090, "ti,tps65090"), 65 COMPAT(COMPAT_NXP_PTN3460, "nxp,ptn3460"), 66 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), 67 COMPAT(PARADE_PS8625, "parade,ps8625"), 68 COMPAT(INTEL_MICROCODE, "intel,microcode"), 69 COMPAT(MEMORY_SPD, "memory-spd"), 70 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"), 71 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"), 72 COMPAT(INTEL_GMA, "intel,gma"), 73 COMPAT(AMS_AS3722, "ams,as3722"), 74 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"), 75 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"), 76 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"), 77 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"), 78 }; 79 80 const char *fdtdec_get_compatible(enum fdt_compat_id id) 81 { 82 /* We allow reading of the 'unknown' ID for testing purposes */ 83 assert(id >= 0 && id < COMPAT_COUNT); 84 return compat_names[id]; 85 } 86 87 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 88 const char *prop_name, fdt_size_t *sizep) 89 { 90 const fdt_addr_t *cell; 91 int len; 92 93 debug("%s: %s: ", __func__, prop_name); 94 cell = fdt_getprop(blob, node, prop_name, &len); 95 if (cell && ((!sizep && len == sizeof(fdt_addr_t)) || 96 len == sizeof(fdt_addr_t) * 2)) { 97 fdt_addr_t addr = fdt_addr_to_cpu(*cell); 98 if (sizep) { 99 const fdt_size_t *size; 100 101 size = (fdt_size_t *)((char *)cell + 102 sizeof(fdt_addr_t)); 103 *sizep = fdt_size_to_cpu(*size); 104 debug("addr=%08lx, size=%08x\n", 105 (ulong)addr, *sizep); 106 } else { 107 debug("%08lx\n", (ulong)addr); 108 } 109 return addr; 110 } 111 debug("(not found)\n"); 112 return FDT_ADDR_T_NONE; 113 } 114 115 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 116 const char *prop_name) 117 { 118 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 119 } 120 121 #ifdef CONFIG_PCI 122 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 123 const char *prop_name, struct fdt_pci_addr *addr) 124 { 125 const u32 *cell; 126 int len; 127 int ret = -ENOENT; 128 129 debug("%s: %s: ", __func__, prop_name); 130 131 /* 132 * If we follow the pci bus bindings strictly, we should check 133 * the value of the node's parent node's #address-cells and 134 * #size-cells. They need to be 3 and 2 accordingly. However, 135 * for simplicity we skip the check here. 136 */ 137 cell = fdt_getprop(blob, node, prop_name, &len); 138 if (!cell) 139 goto fail; 140 141 if ((len % FDT_PCI_REG_SIZE) == 0) { 142 int num = len / FDT_PCI_REG_SIZE; 143 int i; 144 145 for (i = 0; i < num; i++) { 146 debug("pci address #%d: %08lx %08lx %08lx\n", i, 147 (ulong)fdt_addr_to_cpu(cell[0]), 148 (ulong)fdt_addr_to_cpu(cell[1]), 149 (ulong)fdt_addr_to_cpu(cell[2])); 150 if ((fdt_addr_to_cpu(*cell) & type) == type) { 151 addr->phys_hi = fdt_addr_to_cpu(cell[0]); 152 addr->phys_mid = fdt_addr_to_cpu(cell[1]); 153 addr->phys_lo = fdt_addr_to_cpu(cell[2]); 154 break; 155 } else { 156 cell += (FDT_PCI_ADDR_CELLS + 157 FDT_PCI_SIZE_CELLS); 158 } 159 } 160 161 if (i == num) { 162 ret = -ENXIO; 163 goto fail; 164 } 165 166 return 0; 167 } else { 168 ret = -EINVAL; 169 } 170 171 fail: 172 debug("(not found)\n"); 173 return ret; 174 } 175 176 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 177 { 178 const char *list, *end; 179 int len; 180 181 list = fdt_getprop(blob, node, "compatible", &len); 182 if (!list) 183 return -ENOENT; 184 185 end = list + len; 186 while (list < end) { 187 char *s; 188 189 len = strlen(list); 190 if (len >= strlen("pciVVVV,DDDD")) { 191 s = strstr(list, "pci"); 192 193 /* 194 * check if the string is something like pciVVVV,DDDD.RR 195 * or just pciVVVV,DDDD 196 */ 197 if (s && s[7] == ',' && 198 (s[12] == '.' || s[12] == 0)) { 199 s += 3; 200 *vendor = simple_strtol(s, NULL, 16); 201 202 s += 5; 203 *device = simple_strtol(s, NULL, 16); 204 205 return 0; 206 } 207 } else { 208 list += (len + 1); 209 } 210 } 211 212 return -ENOENT; 213 } 214 215 int fdtdec_get_pci_bdf(const void *blob, int node, 216 struct fdt_pci_addr *addr, pci_dev_t *bdf) 217 { 218 u16 dt_vendor, dt_device, vendor, device; 219 int ret; 220 221 /* get vendor id & device id from the compatible string */ 222 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device); 223 if (ret) 224 return ret; 225 226 /* extract the bdf from fdt_pci_addr */ 227 *bdf = addr->phys_hi & 0xffff00; 228 229 /* read vendor id & device id based on bdf */ 230 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor); 231 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device); 232 233 /* 234 * Note there are two places in the device tree to fully describe 235 * a pci device: one is via compatible string with a format of 236 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in 237 * the device node's reg address property. We read the vendor id 238 * and device id based on bdf and compare the values with the 239 * "VVVV,DDDD". If they are the same, then we are good to use bdf 240 * to read device's bar. But if they are different, we have to rely 241 * on the vendor id and device id extracted from the compatible 242 * string and locate the real bdf by pci_find_device(). This is 243 * because normally we may only know device's device number and 244 * function number when writing device tree. The bus number is 245 * dynamically assigned during the pci enumeration process. 246 */ 247 if ((dt_vendor != vendor) || (dt_device != device)) { 248 *bdf = pci_find_device(dt_vendor, dt_device, 0); 249 if (*bdf == -1) 250 return -ENODEV; 251 } 252 253 return 0; 254 } 255 256 int fdtdec_get_pci_bar32(const void *blob, int node, 257 struct fdt_pci_addr *addr, u32 *bar) 258 { 259 pci_dev_t bdf; 260 int barnum; 261 int ret; 262 263 /* get pci devices's bdf */ 264 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf); 265 if (ret) 266 return ret; 267 268 /* extract the bar number from fdt_pci_addr */ 269 barnum = addr->phys_hi & 0xff; 270 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) 271 return -EINVAL; 272 273 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; 274 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum); 275 276 return 0; 277 } 278 #endif 279 280 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 281 uint64_t default_val) 282 { 283 const uint64_t *cell64; 284 int length; 285 286 cell64 = fdt_getprop(blob, node, prop_name, &length); 287 if (!cell64 || length < sizeof(*cell64)) 288 return default_val; 289 290 return fdt64_to_cpu(*cell64); 291 } 292 293 int fdtdec_get_is_enabled(const void *blob, int node) 294 { 295 const char *cell; 296 297 /* 298 * It should say "okay", so only allow that. Some fdts use "ok" but 299 * this is a bug. Please fix your device tree source file. See here 300 * for discussion: 301 * 302 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 303 */ 304 cell = fdt_getprop(blob, node, "status", NULL); 305 if (cell) 306 return 0 == strcmp(cell, "okay"); 307 return 1; 308 } 309 310 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 311 { 312 enum fdt_compat_id id; 313 314 /* Search our drivers */ 315 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 316 if (0 == fdt_node_check_compatible(blob, node, 317 compat_names[id])) 318 return id; 319 return COMPAT_UNKNOWN; 320 } 321 322 int fdtdec_next_compatible(const void *blob, int node, 323 enum fdt_compat_id id) 324 { 325 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 326 } 327 328 int fdtdec_next_compatible_subnode(const void *blob, int node, 329 enum fdt_compat_id id, int *depthp) 330 { 331 do { 332 node = fdt_next_node(blob, node, depthp); 333 } while (*depthp > 1); 334 335 /* If this is a direct subnode, and compatible, return it */ 336 if (*depthp == 1 && 0 == fdt_node_check_compatible( 337 blob, node, compat_names[id])) 338 return node; 339 340 return -FDT_ERR_NOTFOUND; 341 } 342 343 int fdtdec_next_alias(const void *blob, const char *name, 344 enum fdt_compat_id id, int *upto) 345 { 346 #define MAX_STR_LEN 20 347 char str[MAX_STR_LEN + 20]; 348 int node, err; 349 350 /* snprintf() is not available */ 351 assert(strlen(name) < MAX_STR_LEN); 352 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 353 node = fdt_path_offset(blob, str); 354 if (node < 0) 355 return node; 356 err = fdt_node_check_compatible(blob, node, compat_names[id]); 357 if (err < 0) 358 return err; 359 if (err) 360 return -FDT_ERR_NOTFOUND; 361 (*upto)++; 362 return node; 363 } 364 365 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 366 enum fdt_compat_id id, int *node_list, int maxcount) 367 { 368 memset(node_list, '\0', sizeof(*node_list) * maxcount); 369 370 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 371 } 372 373 /* TODO: Can we tighten this code up a little? */ 374 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 375 enum fdt_compat_id id, int *node_list, int maxcount) 376 { 377 int name_len = strlen(name); 378 int nodes[maxcount]; 379 int num_found = 0; 380 int offset, node; 381 int alias_node; 382 int count; 383 int i, j; 384 385 /* find the alias node if present */ 386 alias_node = fdt_path_offset(blob, "/aliases"); 387 388 /* 389 * start with nothing, and we can assume that the root node can't 390 * match 391 */ 392 memset(nodes, '\0', sizeof(nodes)); 393 394 /* First find all the compatible nodes */ 395 for (node = count = 0; node >= 0 && count < maxcount;) { 396 node = fdtdec_next_compatible(blob, node, id); 397 if (node >= 0) 398 nodes[count++] = node; 399 } 400 if (node >= 0) 401 debug("%s: warning: maxcount exceeded with alias '%s'\n", 402 __func__, name); 403 404 /* Now find all the aliases */ 405 for (offset = fdt_first_property_offset(blob, alias_node); 406 offset > 0; 407 offset = fdt_next_property_offset(blob, offset)) { 408 const struct fdt_property *prop; 409 const char *path; 410 int number; 411 int found; 412 413 node = 0; 414 prop = fdt_get_property_by_offset(blob, offset, NULL); 415 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 416 if (prop->len && 0 == strncmp(path, name, name_len)) 417 node = fdt_path_offset(blob, prop->data); 418 if (node <= 0) 419 continue; 420 421 /* Get the alias number */ 422 number = simple_strtoul(path + name_len, NULL, 10); 423 if (number < 0 || number >= maxcount) { 424 debug("%s: warning: alias '%s' is out of range\n", 425 __func__, path); 426 continue; 427 } 428 429 /* Make sure the node we found is actually in our list! */ 430 found = -1; 431 for (j = 0; j < count; j++) 432 if (nodes[j] == node) { 433 found = j; 434 break; 435 } 436 437 if (found == -1) { 438 debug("%s: warning: alias '%s' points to a node " 439 "'%s' that is missing or is not compatible " 440 " with '%s'\n", __func__, path, 441 fdt_get_name(blob, node, NULL), 442 compat_names[id]); 443 continue; 444 } 445 446 /* 447 * Add this node to our list in the right place, and mark 448 * it as done. 449 */ 450 if (fdtdec_get_is_enabled(blob, node)) { 451 if (node_list[number]) { 452 debug("%s: warning: alias '%s' requires that " 453 "a node be placed in the list in a " 454 "position which is already filled by " 455 "node '%s'\n", __func__, path, 456 fdt_get_name(blob, node, NULL)); 457 continue; 458 } 459 node_list[number] = node; 460 if (number >= num_found) 461 num_found = number + 1; 462 } 463 nodes[found] = 0; 464 } 465 466 /* Add any nodes not mentioned by an alias */ 467 for (i = j = 0; i < maxcount; i++) { 468 if (!node_list[i]) { 469 for (; j < maxcount; j++) 470 if (nodes[j] && 471 fdtdec_get_is_enabled(blob, nodes[j])) 472 break; 473 474 /* Have we run out of nodes to add? */ 475 if (j == maxcount) 476 break; 477 478 assert(!node_list[i]); 479 node_list[i] = nodes[j++]; 480 if (i >= num_found) 481 num_found = i + 1; 482 } 483 } 484 485 return num_found; 486 } 487 488 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 489 int *seqp) 490 { 491 int base_len = strlen(base); 492 const char *find_name; 493 int find_namelen; 494 int prop_offset; 495 int aliases; 496 497 find_name = fdt_get_name(blob, offset, &find_namelen); 498 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 499 500 aliases = fdt_path_offset(blob, "/aliases"); 501 for (prop_offset = fdt_first_property_offset(blob, aliases); 502 prop_offset > 0; 503 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 504 const char *prop; 505 const char *name; 506 const char *slash; 507 const char *p; 508 int len; 509 510 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 511 debug(" - %s, %s\n", name, prop); 512 if (len < find_namelen || *prop != '/' || prop[len - 1] || 513 strncmp(name, base, base_len)) 514 continue; 515 516 slash = strrchr(prop, '/'); 517 if (strcmp(slash + 1, find_name)) 518 continue; 519 for (p = name + strlen(name) - 1; p > name; p--) { 520 if (!isdigit(*p)) { 521 *seqp = simple_strtoul(p + 1, NULL, 10); 522 debug("Found seq %d\n", *seqp); 523 return 0; 524 } 525 } 526 } 527 528 debug("Not found\n"); 529 return -ENOENT; 530 } 531 532 int fdtdec_get_chosen_node(const void *blob, const char *name) 533 { 534 const char *prop; 535 int chosen_node; 536 int len; 537 538 if (!blob) 539 return -FDT_ERR_NOTFOUND; 540 chosen_node = fdt_path_offset(blob, "/chosen"); 541 prop = fdt_getprop(blob, chosen_node, name, &len); 542 if (!prop) 543 return -FDT_ERR_NOTFOUND; 544 return fdt_path_offset(blob, prop); 545 } 546 547 int fdtdec_check_fdt(void) 548 { 549 /* 550 * We must have an FDT, but we cannot panic() yet since the console 551 * is not ready. So for now, just assert(). Boards which need an early 552 * FDT (prior to console ready) will need to make their own 553 * arrangements and do their own checks. 554 */ 555 assert(!fdtdec_prepare_fdt()); 556 return 0; 557 } 558 559 /* 560 * This function is a little odd in that it accesses global data. At some 561 * point if the architecture board.c files merge this will make more sense. 562 * Even now, it is common code. 563 */ 564 int fdtdec_prepare_fdt(void) 565 { 566 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 567 fdt_check_header(gd->fdt_blob)) { 568 #ifdef CONFIG_SPL_BUILD 569 puts("Missing DTB\n"); 570 #else 571 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"); 572 #endif 573 return -1; 574 } 575 return 0; 576 } 577 578 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 579 { 580 const u32 *phandle; 581 int lookup; 582 583 debug("%s: %s\n", __func__, prop_name); 584 phandle = fdt_getprop(blob, node, prop_name, NULL); 585 if (!phandle) 586 return -FDT_ERR_NOTFOUND; 587 588 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 589 return lookup; 590 } 591 592 /** 593 * Look up a property in a node and check that it has a minimum length. 594 * 595 * @param blob FDT blob 596 * @param node node to examine 597 * @param prop_name name of property to find 598 * @param min_len minimum property length in bytes 599 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 600 found, or -FDT_ERR_BADLAYOUT if not enough data 601 * @return pointer to cell, which is only valid if err == 0 602 */ 603 static const void *get_prop_check_min_len(const void *blob, int node, 604 const char *prop_name, int min_len, int *err) 605 { 606 const void *cell; 607 int len; 608 609 debug("%s: %s\n", __func__, prop_name); 610 cell = fdt_getprop(blob, node, prop_name, &len); 611 if (!cell) 612 *err = -FDT_ERR_NOTFOUND; 613 else if (len < min_len) 614 *err = -FDT_ERR_BADLAYOUT; 615 else 616 *err = 0; 617 return cell; 618 } 619 620 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 621 u32 *array, int count) 622 { 623 const u32 *cell; 624 int i, err = 0; 625 626 debug("%s: %s\n", __func__, prop_name); 627 cell = get_prop_check_min_len(blob, node, prop_name, 628 sizeof(u32) * count, &err); 629 if (!err) { 630 for (i = 0; i < count; i++) 631 array[i] = fdt32_to_cpu(cell[i]); 632 } 633 return err; 634 } 635 636 int fdtdec_get_int_array_count(const void *blob, int node, 637 const char *prop_name, u32 *array, int count) 638 { 639 const u32 *cell; 640 int len, elems; 641 int i; 642 643 debug("%s: %s\n", __func__, prop_name); 644 cell = fdt_getprop(blob, node, prop_name, &len); 645 if (!cell) 646 return -FDT_ERR_NOTFOUND; 647 elems = len / sizeof(u32); 648 if (count > elems) 649 count = elems; 650 for (i = 0; i < count; i++) 651 array[i] = fdt32_to_cpu(cell[i]); 652 653 return count; 654 } 655 656 const u32 *fdtdec_locate_array(const void *blob, int node, 657 const char *prop_name, int count) 658 { 659 const u32 *cell; 660 int err; 661 662 cell = get_prop_check_min_len(blob, node, prop_name, 663 sizeof(u32) * count, &err); 664 return err ? NULL : cell; 665 } 666 667 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 668 { 669 const s32 *cell; 670 int len; 671 672 debug("%s: %s\n", __func__, prop_name); 673 cell = fdt_getprop(blob, node, prop_name, &len); 674 return cell != NULL; 675 } 676 677 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 678 const char *list_name, 679 const char *cells_name, 680 int cell_count, int index, 681 struct fdtdec_phandle_args *out_args) 682 { 683 const __be32 *list, *list_end; 684 int rc = 0, size, cur_index = 0; 685 uint32_t count = 0; 686 int node = -1; 687 int phandle; 688 689 /* Retrieve the phandle list property */ 690 list = fdt_getprop(blob, src_node, list_name, &size); 691 if (!list) 692 return -ENOENT; 693 list_end = list + size / sizeof(*list); 694 695 /* Loop over the phandles until all the requested entry is found */ 696 while (list < list_end) { 697 rc = -EINVAL; 698 count = 0; 699 700 /* 701 * If phandle is 0, then it is an empty entry with no 702 * arguments. Skip forward to the next entry. 703 */ 704 phandle = be32_to_cpup(list++); 705 if (phandle) { 706 /* 707 * Find the provider node and parse the #*-cells 708 * property to determine the argument length. 709 * 710 * This is not needed if the cell count is hard-coded 711 * (i.e. cells_name not set, but cell_count is set), 712 * except when we're going to return the found node 713 * below. 714 */ 715 if (cells_name || cur_index == index) { 716 node = fdt_node_offset_by_phandle(blob, 717 phandle); 718 if (!node) { 719 debug("%s: could not find phandle\n", 720 fdt_get_name(blob, src_node, 721 NULL)); 722 goto err; 723 } 724 } 725 726 if (cells_name) { 727 count = fdtdec_get_int(blob, node, cells_name, 728 -1); 729 if (count == -1) { 730 debug("%s: could not get %s for %s\n", 731 fdt_get_name(blob, src_node, 732 NULL), 733 cells_name, 734 fdt_get_name(blob, node, 735 NULL)); 736 goto err; 737 } 738 } else { 739 count = cell_count; 740 } 741 742 /* 743 * Make sure that the arguments actually fit in the 744 * remaining property data length 745 */ 746 if (list + count > list_end) { 747 debug("%s: arguments longer than property\n", 748 fdt_get_name(blob, src_node, NULL)); 749 goto err; 750 } 751 } 752 753 /* 754 * All of the error cases above bail out of the loop, so at 755 * this point, the parsing is successful. If the requested 756 * index matches, then fill the out_args structure and return, 757 * or return -ENOENT for an empty entry. 758 */ 759 rc = -ENOENT; 760 if (cur_index == index) { 761 if (!phandle) 762 goto err; 763 764 if (out_args) { 765 int i; 766 767 if (count > MAX_PHANDLE_ARGS) { 768 debug("%s: too many arguments %d\n", 769 fdt_get_name(blob, src_node, 770 NULL), count); 771 count = MAX_PHANDLE_ARGS; 772 } 773 out_args->node = node; 774 out_args->args_count = count; 775 for (i = 0; i < count; i++) { 776 out_args->args[i] = 777 be32_to_cpup(list++); 778 } 779 } 780 781 /* Found it! return success */ 782 return 0; 783 } 784 785 node = -1; 786 list += count; 787 cur_index++; 788 } 789 790 /* 791 * Result will be one of: 792 * -ENOENT : index is for empty phandle 793 * -EINVAL : parsing error on data 794 * [1..n] : Number of phandle (count mode; when index = -1) 795 */ 796 rc = index < 0 ? cur_index : -ENOENT; 797 err: 798 return rc; 799 } 800 801 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 802 u8 *array, int count) 803 { 804 const u8 *cell; 805 int err; 806 807 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 808 if (!err) 809 memcpy(array, cell, count); 810 return err; 811 } 812 813 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 814 const char *prop_name, int count) 815 { 816 const u8 *cell; 817 int err; 818 819 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 820 if (err) 821 return NULL; 822 return cell; 823 } 824 825 int fdtdec_get_config_int(const void *blob, const char *prop_name, 826 int default_val) 827 { 828 int config_node; 829 830 debug("%s: %s\n", __func__, prop_name); 831 config_node = fdt_path_offset(blob, "/config"); 832 if (config_node < 0) 833 return default_val; 834 return fdtdec_get_int(blob, config_node, prop_name, default_val); 835 } 836 837 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 838 { 839 int config_node; 840 const void *prop; 841 842 debug("%s: %s\n", __func__, prop_name); 843 config_node = fdt_path_offset(blob, "/config"); 844 if (config_node < 0) 845 return 0; 846 prop = fdt_get_property(blob, config_node, prop_name, NULL); 847 848 return prop != NULL; 849 } 850 851 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 852 { 853 const char *nodep; 854 int nodeoffset; 855 int len; 856 857 debug("%s: %s\n", __func__, prop_name); 858 nodeoffset = fdt_path_offset(blob, "/config"); 859 if (nodeoffset < 0) 860 return NULL; 861 862 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 863 if (!nodep) 864 return NULL; 865 866 return (char *)nodep; 867 } 868 869 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 870 fdt_addr_t *basep, fdt_size_t *sizep) 871 { 872 const fdt_addr_t *cell; 873 int len; 874 875 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 876 prop_name); 877 cell = fdt_getprop(blob, node, prop_name, &len); 878 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 879 debug("cell=%p, len=%d\n", cell, len); 880 return -1; 881 } 882 883 *basep = fdt_addr_to_cpu(*cell); 884 *sizep = fdt_size_to_cpu(cell[1]); 885 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 886 (ulong)*sizep); 887 888 return 0; 889 } 890 891 /** 892 * Read a flash entry from the fdt 893 * 894 * @param blob FDT blob 895 * @param node Offset of node to read 896 * @param name Name of node being read 897 * @param entry Place to put offset and size of this node 898 * @return 0 if ok, -ve on error 899 */ 900 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 901 struct fmap_entry *entry) 902 { 903 const char *prop; 904 u32 reg[2]; 905 906 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 907 debug("Node '%s' has bad/missing 'reg' property\n", name); 908 return -FDT_ERR_NOTFOUND; 909 } 910 entry->offset = reg[0]; 911 entry->length = reg[1]; 912 entry->used = fdtdec_get_int(blob, node, "used", entry->length); 913 prop = fdt_getprop(blob, node, "compress", NULL); 914 entry->compress_algo = prop && !strcmp(prop, "lzo") ? 915 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; 916 prop = fdt_getprop(blob, node, "hash", &entry->hash_size); 917 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; 918 entry->hash = (uint8_t *)prop; 919 920 return 0; 921 } 922 923 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 924 { 925 u64 number = 0; 926 927 while (cells--) 928 number = (number << 32) | fdt32_to_cpu(*ptr++); 929 930 return number; 931 } 932 933 int fdt_get_resource(const void *fdt, int node, const char *property, 934 unsigned int index, struct fdt_resource *res) 935 { 936 const fdt32_t *ptr, *end; 937 int na, ns, len, parent; 938 unsigned int i = 0; 939 940 parent = fdt_parent_offset(fdt, node); 941 if (parent < 0) 942 return parent; 943 944 na = fdt_address_cells(fdt, parent); 945 ns = fdt_size_cells(fdt, parent); 946 947 ptr = fdt_getprop(fdt, node, property, &len); 948 if (!ptr) 949 return len; 950 951 end = ptr + len / sizeof(*ptr); 952 953 while (ptr + na + ns <= end) { 954 if (i == index) { 955 res->start = res->end = fdtdec_get_number(ptr, na); 956 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 957 return 0; 958 } 959 960 ptr += na + ns; 961 i++; 962 } 963 964 return -FDT_ERR_NOTFOUND; 965 } 966 967 int fdt_get_named_resource(const void *fdt, int node, const char *property, 968 const char *prop_names, const char *name, 969 struct fdt_resource *res) 970 { 971 int index; 972 973 index = fdt_find_string(fdt, node, prop_names, name); 974 if (index < 0) 975 return index; 976 977 return fdt_get_resource(fdt, node, property, index, res); 978 } 979 980 int fdtdec_decode_memory_region(const void *blob, int config_node, 981 const char *mem_type, const char *suffix, 982 fdt_addr_t *basep, fdt_size_t *sizep) 983 { 984 char prop_name[50]; 985 const char *mem; 986 fdt_size_t size, offset_size; 987 fdt_addr_t base, offset; 988 int node; 989 990 if (config_node == -1) { 991 config_node = fdt_path_offset(blob, "/config"); 992 if (config_node < 0) { 993 debug("%s: Cannot find /config node\n", __func__); 994 return -ENOENT; 995 } 996 } 997 if (!suffix) 998 suffix = ""; 999 1000 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 1001 suffix); 1002 mem = fdt_getprop(blob, config_node, prop_name, NULL); 1003 if (!mem) { 1004 debug("%s: No memory type for '%s', using /memory\n", __func__, 1005 prop_name); 1006 mem = "/memory"; 1007 } 1008 1009 node = fdt_path_offset(blob, mem); 1010 if (node < 0) { 1011 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 1012 fdt_strerror(node)); 1013 return -ENOENT; 1014 } 1015 1016 /* 1017 * Not strictly correct - the memory may have multiple banks. We just 1018 * use the first 1019 */ 1020 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 1021 debug("%s: Failed to decode memory region %s\n", __func__, 1022 mem); 1023 return -EINVAL; 1024 } 1025 1026 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 1027 suffix); 1028 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 1029 &offset_size)) { 1030 debug("%s: Failed to decode memory region '%s'\n", __func__, 1031 prop_name); 1032 return -EINVAL; 1033 } 1034 1035 *basep = base + offset; 1036 *sizep = offset_size; 1037 1038 return 0; 1039 } 1040 #endif 1041