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 #include <asm/gpio.h> 15 16 DECLARE_GLOBAL_DATA_PTR; 17 18 /* 19 * Here are the type we know about. One day we might allow drivers to 20 * register. For now we just put them here. The COMPAT macro allows us to 21 * turn this into a sparse list later, and keeps the ID with the name. 22 */ 23 #define COMPAT(id, name) name 24 static const char * const compat_names[COMPAT_COUNT] = { 25 COMPAT(UNKNOWN, "<none>"), 26 COMPAT(NVIDIA_TEGRA20_USB, "nvidia,tegra20-ehci"), 27 COMPAT(NVIDIA_TEGRA30_USB, "nvidia,tegra30-ehci"), 28 COMPAT(NVIDIA_TEGRA114_USB, "nvidia,tegra114-ehci"), 29 COMPAT(NVIDIA_TEGRA114_I2C, "nvidia,tegra114-i2c"), 30 COMPAT(NVIDIA_TEGRA20_I2C, "nvidia,tegra20-i2c"), 31 COMPAT(NVIDIA_TEGRA20_DVC, "nvidia,tegra20-i2c-dvc"), 32 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"), 33 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"), 34 COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"), 35 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"), 36 COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"), 37 COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"), 38 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"), 39 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"), 40 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"), 41 COMPAT(NVIDIA_TEGRA20_SFLASH, "nvidia,tegra20-sflash"), 42 COMPAT(NVIDIA_TEGRA20_SLINK, "nvidia,tegra20-slink"), 43 COMPAT(NVIDIA_TEGRA114_SPI, "nvidia,tegra114-spi"), 44 COMPAT(SMSC_LAN9215, "smsc,lan9215"), 45 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), 46 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), 47 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), 48 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), 49 COMPAT(SAMSUNG_EXYNOS_SPI, "samsung,exynos-spi"), 50 COMPAT(GOOGLE_CROS_EC, "google,cros-ec"), 51 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"), 52 COMPAT(SAMSUNG_EXYNOS_EHCI, "samsung,exynos-ehci"), 53 COMPAT(SAMSUNG_EXYNOS5_XHCI, "samsung,exynos5250-xhci"), 54 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), 55 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"), 56 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), 57 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"), 58 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"), 59 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"), 60 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), 61 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), 62 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"), 63 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"), 64 COMPAT(GENERIC_SPI_FLASH, "spi-flash"), 65 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), 66 COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"), 67 COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645-tpm"), 68 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), 69 COMPAT(SANDBOX_HOST_EMULATION, "sandbox,host-emulation"), 70 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"), 71 COMPAT(TI_TPS65090, "ti,tps65090"), 72 COMPAT(COMPAT_NXP_PTN3460, "nxp,ptn3460"), 73 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), 74 }; 75 76 const char *fdtdec_get_compatible(enum fdt_compat_id id) 77 { 78 /* We allow reading of the 'unknown' ID for testing purposes */ 79 assert(id >= 0 && id < COMPAT_COUNT); 80 return compat_names[id]; 81 } 82 83 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 84 const char *prop_name, fdt_size_t *sizep) 85 { 86 const fdt_addr_t *cell; 87 int len; 88 89 debug("%s: %s: ", __func__, prop_name); 90 cell = fdt_getprop(blob, node, prop_name, &len); 91 if (cell && ((!sizep && len == sizeof(fdt_addr_t)) || 92 len == sizeof(fdt_addr_t) * 2)) { 93 fdt_addr_t addr = fdt_addr_to_cpu(*cell); 94 if (sizep) { 95 const fdt_size_t *size; 96 97 size = (fdt_size_t *)((char *)cell + 98 sizeof(fdt_addr_t)); 99 *sizep = fdt_size_to_cpu(*size); 100 debug("addr=%08lx, size=%08x\n", 101 (ulong)addr, *sizep); 102 } else { 103 debug("%08lx\n", (ulong)addr); 104 } 105 return addr; 106 } 107 debug("(not found)\n"); 108 return FDT_ADDR_T_NONE; 109 } 110 111 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 112 const char *prop_name) 113 { 114 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 115 } 116 117 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 118 uint64_t default_val) 119 { 120 const uint64_t *cell64; 121 int length; 122 123 cell64 = fdt_getprop(blob, node, prop_name, &length); 124 if (!cell64 || length < sizeof(*cell64)) 125 return default_val; 126 127 return fdt64_to_cpu(*cell64); 128 } 129 130 int fdtdec_get_is_enabled(const void *blob, int node) 131 { 132 const char *cell; 133 134 /* 135 * It should say "okay", so only allow that. Some fdts use "ok" but 136 * this is a bug. Please fix your device tree source file. See here 137 * for discussion: 138 * 139 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 140 */ 141 cell = fdt_getprop(blob, node, "status", NULL); 142 if (cell) 143 return 0 == strcmp(cell, "okay"); 144 return 1; 145 } 146 147 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 148 { 149 enum fdt_compat_id id; 150 151 /* Search our drivers */ 152 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 153 if (0 == fdt_node_check_compatible(blob, node, 154 compat_names[id])) 155 return id; 156 return COMPAT_UNKNOWN; 157 } 158 159 int fdtdec_next_compatible(const void *blob, int node, 160 enum fdt_compat_id id) 161 { 162 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 163 } 164 165 int fdtdec_next_compatible_subnode(const void *blob, int node, 166 enum fdt_compat_id id, int *depthp) 167 { 168 do { 169 node = fdt_next_node(blob, node, depthp); 170 } while (*depthp > 1); 171 172 /* If this is a direct subnode, and compatible, return it */ 173 if (*depthp == 1 && 0 == fdt_node_check_compatible( 174 blob, node, compat_names[id])) 175 return node; 176 177 return -FDT_ERR_NOTFOUND; 178 } 179 180 int fdtdec_next_alias(const void *blob, const char *name, 181 enum fdt_compat_id id, int *upto) 182 { 183 #define MAX_STR_LEN 20 184 char str[MAX_STR_LEN + 20]; 185 int node, err; 186 187 /* snprintf() is not available */ 188 assert(strlen(name) < MAX_STR_LEN); 189 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 190 node = fdt_path_offset(blob, str); 191 if (node < 0) 192 return node; 193 err = fdt_node_check_compatible(blob, node, compat_names[id]); 194 if (err < 0) 195 return err; 196 if (err) 197 return -FDT_ERR_NOTFOUND; 198 (*upto)++; 199 return node; 200 } 201 202 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 203 enum fdt_compat_id id, int *node_list, int maxcount) 204 { 205 memset(node_list, '\0', sizeof(*node_list) * maxcount); 206 207 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 208 } 209 210 /* TODO: Can we tighten this code up a little? */ 211 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 212 enum fdt_compat_id id, int *node_list, int maxcount) 213 { 214 int name_len = strlen(name); 215 int nodes[maxcount]; 216 int num_found = 0; 217 int offset, node; 218 int alias_node; 219 int count; 220 int i, j; 221 222 /* find the alias node if present */ 223 alias_node = fdt_path_offset(blob, "/aliases"); 224 225 /* 226 * start with nothing, and we can assume that the root node can't 227 * match 228 */ 229 memset(nodes, '\0', sizeof(nodes)); 230 231 /* First find all the compatible nodes */ 232 for (node = count = 0; node >= 0 && count < maxcount;) { 233 node = fdtdec_next_compatible(blob, node, id); 234 if (node >= 0) 235 nodes[count++] = node; 236 } 237 if (node >= 0) 238 debug("%s: warning: maxcount exceeded with alias '%s'\n", 239 __func__, name); 240 241 /* Now find all the aliases */ 242 for (offset = fdt_first_property_offset(blob, alias_node); 243 offset > 0; 244 offset = fdt_next_property_offset(blob, offset)) { 245 const struct fdt_property *prop; 246 const char *path; 247 int number; 248 int found; 249 250 node = 0; 251 prop = fdt_get_property_by_offset(blob, offset, NULL); 252 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 253 if (prop->len && 0 == strncmp(path, name, name_len)) 254 node = fdt_path_offset(blob, prop->data); 255 if (node <= 0) 256 continue; 257 258 /* Get the alias number */ 259 number = simple_strtoul(path + name_len, NULL, 10); 260 if (number < 0 || number >= maxcount) { 261 debug("%s: warning: alias '%s' is out of range\n", 262 __func__, path); 263 continue; 264 } 265 266 /* Make sure the node we found is actually in our list! */ 267 found = -1; 268 for (j = 0; j < count; j++) 269 if (nodes[j] == node) { 270 found = j; 271 break; 272 } 273 274 if (found == -1) { 275 debug("%s: warning: alias '%s' points to a node " 276 "'%s' that is missing or is not compatible " 277 " with '%s'\n", __func__, path, 278 fdt_get_name(blob, node, NULL), 279 compat_names[id]); 280 continue; 281 } 282 283 /* 284 * Add this node to our list in the right place, and mark 285 * it as done. 286 */ 287 if (fdtdec_get_is_enabled(blob, node)) { 288 if (node_list[number]) { 289 debug("%s: warning: alias '%s' requires that " 290 "a node be placed in the list in a " 291 "position which is already filled by " 292 "node '%s'\n", __func__, path, 293 fdt_get_name(blob, node, NULL)); 294 continue; 295 } 296 node_list[number] = node; 297 if (number >= num_found) 298 num_found = number + 1; 299 } 300 nodes[found] = 0; 301 } 302 303 /* Add any nodes not mentioned by an alias */ 304 for (i = j = 0; i < maxcount; i++) { 305 if (!node_list[i]) { 306 for (; j < maxcount; j++) 307 if (nodes[j] && 308 fdtdec_get_is_enabled(blob, nodes[j])) 309 break; 310 311 /* Have we run out of nodes to add? */ 312 if (j == maxcount) 313 break; 314 315 assert(!node_list[i]); 316 node_list[i] = nodes[j++]; 317 if (i >= num_found) 318 num_found = i + 1; 319 } 320 } 321 322 return num_found; 323 } 324 325 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 326 int *seqp) 327 { 328 int base_len = strlen(base); 329 const char *find_name; 330 int find_namelen; 331 int prop_offset; 332 int aliases; 333 334 find_name = fdt_get_name(blob, offset, &find_namelen); 335 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 336 337 aliases = fdt_path_offset(blob, "/aliases"); 338 for (prop_offset = fdt_first_property_offset(blob, aliases); 339 prop_offset > 0; 340 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 341 const char *prop; 342 const char *name; 343 const char *slash; 344 const char *p; 345 int len; 346 347 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 348 debug(" - %s, %s\n", name, prop); 349 if (len < find_namelen || *prop != '/' || prop[len - 1] || 350 strncmp(name, base, base_len)) 351 continue; 352 353 slash = strrchr(prop, '/'); 354 if (strcmp(slash + 1, find_name)) 355 continue; 356 for (p = name; *p; p++) { 357 if (isdigit(*p)) { 358 *seqp = simple_strtoul(p, NULL, 10); 359 debug("Found seq %d\n", *seqp); 360 return 0; 361 } 362 } 363 } 364 365 debug("Not found\n"); 366 return -ENOENT; 367 } 368 369 int fdtdec_get_alias_node(const void *blob, const char *name) 370 { 371 const char *prop; 372 int alias_node; 373 int len; 374 375 if (!blob) 376 return -FDT_ERR_NOTFOUND; 377 alias_node = fdt_path_offset(blob, "/aliases"); 378 prop = fdt_getprop(blob, alias_node, name, &len); 379 if (!prop) 380 return -FDT_ERR_NOTFOUND; 381 return fdt_path_offset(blob, prop); 382 } 383 384 int fdtdec_check_fdt(void) 385 { 386 /* 387 * We must have an FDT, but we cannot panic() yet since the console 388 * is not ready. So for now, just assert(). Boards which need an early 389 * FDT (prior to console ready) will need to make their own 390 * arrangements and do their own checks. 391 */ 392 assert(!fdtdec_prepare_fdt()); 393 return 0; 394 } 395 396 /* 397 * This function is a little odd in that it accesses global data. At some 398 * point if the architecture board.c files merge this will make more sense. 399 * Even now, it is common code. 400 */ 401 int fdtdec_prepare_fdt(void) 402 { 403 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 404 fdt_check_header(gd->fdt_blob)) { 405 printf("No valid FDT found - please append one to U-Boot " 406 "binary, use u-boot-dtb.bin or define " 407 "CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n"); 408 return -1; 409 } 410 return 0; 411 } 412 413 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 414 { 415 const u32 *phandle; 416 int lookup; 417 418 debug("%s: %s\n", __func__, prop_name); 419 phandle = fdt_getprop(blob, node, prop_name, NULL); 420 if (!phandle) 421 return -FDT_ERR_NOTFOUND; 422 423 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 424 return lookup; 425 } 426 427 /** 428 * Look up a property in a node and check that it has a minimum length. 429 * 430 * @param blob FDT blob 431 * @param node node to examine 432 * @param prop_name name of property to find 433 * @param min_len minimum property length in bytes 434 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 435 found, or -FDT_ERR_BADLAYOUT if not enough data 436 * @return pointer to cell, which is only valid if err == 0 437 */ 438 static const void *get_prop_check_min_len(const void *blob, int node, 439 const char *prop_name, int min_len, int *err) 440 { 441 const void *cell; 442 int len; 443 444 debug("%s: %s\n", __func__, prop_name); 445 cell = fdt_getprop(blob, node, prop_name, &len); 446 if (!cell) 447 *err = -FDT_ERR_NOTFOUND; 448 else if (len < min_len) 449 *err = -FDT_ERR_BADLAYOUT; 450 else 451 *err = 0; 452 return cell; 453 } 454 455 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 456 u32 *array, int count) 457 { 458 const u32 *cell; 459 int i, err = 0; 460 461 debug("%s: %s\n", __func__, prop_name); 462 cell = get_prop_check_min_len(blob, node, prop_name, 463 sizeof(u32) * count, &err); 464 if (!err) { 465 for (i = 0; i < count; i++) 466 array[i] = fdt32_to_cpu(cell[i]); 467 } 468 return err; 469 } 470 471 const u32 *fdtdec_locate_array(const void *blob, int node, 472 const char *prop_name, int count) 473 { 474 const u32 *cell; 475 int err; 476 477 cell = get_prop_check_min_len(blob, node, prop_name, 478 sizeof(u32) * count, &err); 479 return err ? NULL : cell; 480 } 481 482 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 483 { 484 const s32 *cell; 485 int len; 486 487 debug("%s: %s\n", __func__, prop_name); 488 cell = fdt_getprop(blob, node, prop_name, &len); 489 return cell != NULL; 490 } 491 492 /** 493 * Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no 494 * terminating item. 495 * 496 * @param blob FDT blob to use 497 * @param node Node to look at 498 * @param prop_name Node property name 499 * @param gpio Array of gpio elements to fill from FDT. This will be 500 * untouched if either 0 or an error is returned 501 * @param max_count Maximum number of elements allowed 502 * @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would 503 * be exceeded, or -FDT_ERR_NOTFOUND if the property is missing. 504 */ 505 int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name, 506 struct fdt_gpio_state *gpio, int max_count) 507 { 508 const struct fdt_property *prop; 509 const u32 *cell; 510 const char *name; 511 int len, i; 512 513 debug("%s: %s\n", __func__, prop_name); 514 assert(max_count > 0); 515 prop = fdt_get_property(blob, node, prop_name, &len); 516 if (!prop) { 517 debug("%s: property '%s' missing\n", __func__, prop_name); 518 return -FDT_ERR_NOTFOUND; 519 } 520 521 /* We will use the name to tag the GPIO */ 522 name = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 523 cell = (u32 *)prop->data; 524 len /= sizeof(u32) * 3; /* 3 cells per GPIO record */ 525 if (len > max_count) { 526 debug(" %s: too many GPIOs / cells for " 527 "property '%s'\n", __func__, prop_name); 528 return -FDT_ERR_BADLAYOUT; 529 } 530 531 /* Read out the GPIO data from the cells */ 532 for (i = 0; i < len; i++, cell += 3) { 533 gpio[i].gpio = fdt32_to_cpu(cell[1]); 534 gpio[i].flags = fdt32_to_cpu(cell[2]); 535 gpio[i].name = name; 536 } 537 538 return len; 539 } 540 541 int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name, 542 struct fdt_gpio_state *gpio) 543 { 544 int err; 545 546 debug("%s: %s\n", __func__, prop_name); 547 gpio->gpio = FDT_GPIO_NONE; 548 gpio->name = NULL; 549 err = fdtdec_decode_gpios(blob, node, prop_name, gpio, 1); 550 return err == 1 ? 0 : err; 551 } 552 553 int fdtdec_get_gpio(struct fdt_gpio_state *gpio) 554 { 555 int val; 556 557 if (!fdt_gpio_isvalid(gpio)) 558 return -1; 559 560 val = gpio_get_value(gpio->gpio); 561 return gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val; 562 } 563 564 int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val) 565 { 566 if (!fdt_gpio_isvalid(gpio)) 567 return -1; 568 569 val = gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val; 570 return gpio_set_value(gpio->gpio, val); 571 } 572 573 int fdtdec_setup_gpio(struct fdt_gpio_state *gpio) 574 { 575 /* 576 * Return success if there is no GPIO defined. This is used for 577 * optional GPIOs) 578 */ 579 if (!fdt_gpio_isvalid(gpio)) 580 return 0; 581 582 if (gpio_request(gpio->gpio, gpio->name)) 583 return -1; 584 return 0; 585 } 586 587 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 588 u8 *array, int count) 589 { 590 const u8 *cell; 591 int err; 592 593 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 594 if (!err) 595 memcpy(array, cell, count); 596 return err; 597 } 598 599 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 600 const char *prop_name, int count) 601 { 602 const u8 *cell; 603 int err; 604 605 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 606 if (err) 607 return NULL; 608 return cell; 609 } 610 611 int fdtdec_get_config_int(const void *blob, const char *prop_name, 612 int default_val) 613 { 614 int config_node; 615 616 debug("%s: %s\n", __func__, prop_name); 617 config_node = fdt_path_offset(blob, "/config"); 618 if (config_node < 0) 619 return default_val; 620 return fdtdec_get_int(blob, config_node, prop_name, default_val); 621 } 622 623 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 624 { 625 int config_node; 626 const void *prop; 627 628 debug("%s: %s\n", __func__, prop_name); 629 config_node = fdt_path_offset(blob, "/config"); 630 if (config_node < 0) 631 return 0; 632 prop = fdt_get_property(blob, config_node, prop_name, NULL); 633 634 return prop != NULL; 635 } 636 637 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 638 { 639 const char *nodep; 640 int nodeoffset; 641 int len; 642 643 debug("%s: %s\n", __func__, prop_name); 644 nodeoffset = fdt_path_offset(blob, "/config"); 645 if (nodeoffset < 0) 646 return NULL; 647 648 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 649 if (!nodep) 650 return NULL; 651 652 return (char *)nodep; 653 } 654 655 int fdtdec_decode_region(const void *blob, int node, 656 const char *prop_name, void **ptrp, size_t *size) 657 { 658 const fdt_addr_t *cell; 659 int len; 660 661 debug("%s: %s\n", __func__, prop_name); 662 cell = fdt_getprop(blob, node, prop_name, &len); 663 if (!cell || (len != sizeof(fdt_addr_t) * 2)) 664 return -1; 665 666 *ptrp = map_sysmem(fdt_addr_to_cpu(*cell), *size); 667 *size = fdt_size_to_cpu(cell[1]); 668 debug("%s: size=%zx\n", __func__, *size); 669 return 0; 670 } 671 672 /** 673 * Read a flash entry from the fdt 674 * 675 * @param blob FDT blob 676 * @param node Offset of node to read 677 * @param name Name of node being read 678 * @param entry Place to put offset and size of this node 679 * @return 0 if ok, -ve on error 680 */ 681 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 682 struct fmap_entry *entry) 683 { 684 u32 reg[2]; 685 686 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 687 debug("Node '%s' has bad/missing 'reg' property\n", name); 688 return -FDT_ERR_NOTFOUND; 689 } 690 entry->offset = reg[0]; 691 entry->length = reg[1]; 692 693 return 0; 694 } 695 #endif 696