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 COMPAT(PARADE_PS8625, "parade,ps8625"), 75 }; 76 77 const char *fdtdec_get_compatible(enum fdt_compat_id id) 78 { 79 /* We allow reading of the 'unknown' ID for testing purposes */ 80 assert(id >= 0 && id < COMPAT_COUNT); 81 return compat_names[id]; 82 } 83 84 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 85 const char *prop_name, fdt_size_t *sizep) 86 { 87 const fdt_addr_t *cell; 88 int len; 89 90 debug("%s: %s: ", __func__, prop_name); 91 cell = fdt_getprop(blob, node, prop_name, &len); 92 if (cell && ((!sizep && len == sizeof(fdt_addr_t)) || 93 len == sizeof(fdt_addr_t) * 2)) { 94 fdt_addr_t addr = fdt_addr_to_cpu(*cell); 95 if (sizep) { 96 const fdt_size_t *size; 97 98 size = (fdt_size_t *)((char *)cell + 99 sizeof(fdt_addr_t)); 100 *sizep = fdt_size_to_cpu(*size); 101 debug("addr=%08lx, size=%08x\n", 102 (ulong)addr, *sizep); 103 } else { 104 debug("%08lx\n", (ulong)addr); 105 } 106 return addr; 107 } 108 debug("(not found)\n"); 109 return FDT_ADDR_T_NONE; 110 } 111 112 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 113 const char *prop_name) 114 { 115 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 116 } 117 118 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 119 uint64_t default_val) 120 { 121 const uint64_t *cell64; 122 int length; 123 124 cell64 = fdt_getprop(blob, node, prop_name, &length); 125 if (!cell64 || length < sizeof(*cell64)) 126 return default_val; 127 128 return fdt64_to_cpu(*cell64); 129 } 130 131 int fdtdec_get_is_enabled(const void *blob, int node) 132 { 133 const char *cell; 134 135 /* 136 * It should say "okay", so only allow that. Some fdts use "ok" but 137 * this is a bug. Please fix your device tree source file. See here 138 * for discussion: 139 * 140 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 141 */ 142 cell = fdt_getprop(blob, node, "status", NULL); 143 if (cell) 144 return 0 == strcmp(cell, "okay"); 145 return 1; 146 } 147 148 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 149 { 150 enum fdt_compat_id id; 151 152 /* Search our drivers */ 153 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 154 if (0 == fdt_node_check_compatible(blob, node, 155 compat_names[id])) 156 return id; 157 return COMPAT_UNKNOWN; 158 } 159 160 int fdtdec_next_compatible(const void *blob, int node, 161 enum fdt_compat_id id) 162 { 163 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 164 } 165 166 int fdtdec_next_compatible_subnode(const void *blob, int node, 167 enum fdt_compat_id id, int *depthp) 168 { 169 do { 170 node = fdt_next_node(blob, node, depthp); 171 } while (*depthp > 1); 172 173 /* If this is a direct subnode, and compatible, return it */ 174 if (*depthp == 1 && 0 == fdt_node_check_compatible( 175 blob, node, compat_names[id])) 176 return node; 177 178 return -FDT_ERR_NOTFOUND; 179 } 180 181 int fdtdec_next_alias(const void *blob, const char *name, 182 enum fdt_compat_id id, int *upto) 183 { 184 #define MAX_STR_LEN 20 185 char str[MAX_STR_LEN + 20]; 186 int node, err; 187 188 /* snprintf() is not available */ 189 assert(strlen(name) < MAX_STR_LEN); 190 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 191 node = fdt_path_offset(blob, str); 192 if (node < 0) 193 return node; 194 err = fdt_node_check_compatible(blob, node, compat_names[id]); 195 if (err < 0) 196 return err; 197 if (err) 198 return -FDT_ERR_NOTFOUND; 199 (*upto)++; 200 return node; 201 } 202 203 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 204 enum fdt_compat_id id, int *node_list, int maxcount) 205 { 206 memset(node_list, '\0', sizeof(*node_list) * maxcount); 207 208 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 209 } 210 211 /* TODO: Can we tighten this code up a little? */ 212 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 213 enum fdt_compat_id id, int *node_list, int maxcount) 214 { 215 int name_len = strlen(name); 216 int nodes[maxcount]; 217 int num_found = 0; 218 int offset, node; 219 int alias_node; 220 int count; 221 int i, j; 222 223 /* find the alias node if present */ 224 alias_node = fdt_path_offset(blob, "/aliases"); 225 226 /* 227 * start with nothing, and we can assume that the root node can't 228 * match 229 */ 230 memset(nodes, '\0', sizeof(nodes)); 231 232 /* First find all the compatible nodes */ 233 for (node = count = 0; node >= 0 && count < maxcount;) { 234 node = fdtdec_next_compatible(blob, node, id); 235 if (node >= 0) 236 nodes[count++] = node; 237 } 238 if (node >= 0) 239 debug("%s: warning: maxcount exceeded with alias '%s'\n", 240 __func__, name); 241 242 /* Now find all the aliases */ 243 for (offset = fdt_first_property_offset(blob, alias_node); 244 offset > 0; 245 offset = fdt_next_property_offset(blob, offset)) { 246 const struct fdt_property *prop; 247 const char *path; 248 int number; 249 int found; 250 251 node = 0; 252 prop = fdt_get_property_by_offset(blob, offset, NULL); 253 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 254 if (prop->len && 0 == strncmp(path, name, name_len)) 255 node = fdt_path_offset(blob, prop->data); 256 if (node <= 0) 257 continue; 258 259 /* Get the alias number */ 260 number = simple_strtoul(path + name_len, NULL, 10); 261 if (number < 0 || number >= maxcount) { 262 debug("%s: warning: alias '%s' is out of range\n", 263 __func__, path); 264 continue; 265 } 266 267 /* Make sure the node we found is actually in our list! */ 268 found = -1; 269 for (j = 0; j < count; j++) 270 if (nodes[j] == node) { 271 found = j; 272 break; 273 } 274 275 if (found == -1) { 276 debug("%s: warning: alias '%s' points to a node " 277 "'%s' that is missing or is not compatible " 278 " with '%s'\n", __func__, path, 279 fdt_get_name(blob, node, NULL), 280 compat_names[id]); 281 continue; 282 } 283 284 /* 285 * Add this node to our list in the right place, and mark 286 * it as done. 287 */ 288 if (fdtdec_get_is_enabled(blob, node)) { 289 if (node_list[number]) { 290 debug("%s: warning: alias '%s' requires that " 291 "a node be placed in the list in a " 292 "position which is already filled by " 293 "node '%s'\n", __func__, path, 294 fdt_get_name(blob, node, NULL)); 295 continue; 296 } 297 node_list[number] = node; 298 if (number >= num_found) 299 num_found = number + 1; 300 } 301 nodes[found] = 0; 302 } 303 304 /* Add any nodes not mentioned by an alias */ 305 for (i = j = 0; i < maxcount; i++) { 306 if (!node_list[i]) { 307 for (; j < maxcount; j++) 308 if (nodes[j] && 309 fdtdec_get_is_enabled(blob, nodes[j])) 310 break; 311 312 /* Have we run out of nodes to add? */ 313 if (j == maxcount) 314 break; 315 316 assert(!node_list[i]); 317 node_list[i] = nodes[j++]; 318 if (i >= num_found) 319 num_found = i + 1; 320 } 321 } 322 323 return num_found; 324 } 325 326 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 327 int *seqp) 328 { 329 int base_len = strlen(base); 330 const char *find_name; 331 int find_namelen; 332 int prop_offset; 333 int aliases; 334 335 find_name = fdt_get_name(blob, offset, &find_namelen); 336 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 337 338 aliases = fdt_path_offset(blob, "/aliases"); 339 for (prop_offset = fdt_first_property_offset(blob, aliases); 340 prop_offset > 0; 341 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 342 const char *prop; 343 const char *name; 344 const char *slash; 345 const char *p; 346 int len; 347 348 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 349 debug(" - %s, %s\n", name, prop); 350 if (len < find_namelen || *prop != '/' || prop[len - 1] || 351 strncmp(name, base, base_len)) 352 continue; 353 354 slash = strrchr(prop, '/'); 355 if (strcmp(slash + 1, find_name)) 356 continue; 357 for (p = name; *p; p++) { 358 if (isdigit(*p)) { 359 *seqp = simple_strtoul(p, NULL, 10); 360 debug("Found seq %d\n", *seqp); 361 return 0; 362 } 363 } 364 } 365 366 debug("Not found\n"); 367 return -ENOENT; 368 } 369 370 int fdtdec_get_alias_node(const void *blob, const char *name) 371 { 372 const char *prop; 373 int alias_node; 374 int len; 375 376 if (!blob) 377 return -FDT_ERR_NOTFOUND; 378 alias_node = fdt_path_offset(blob, "/aliases"); 379 prop = fdt_getprop(blob, alias_node, name, &len); 380 if (!prop) 381 return -FDT_ERR_NOTFOUND; 382 return fdt_path_offset(blob, prop); 383 } 384 385 int fdtdec_check_fdt(void) 386 { 387 /* 388 * We must have an FDT, but we cannot panic() yet since the console 389 * is not ready. So for now, just assert(). Boards which need an early 390 * FDT (prior to console ready) will need to make their own 391 * arrangements and do their own checks. 392 */ 393 assert(!fdtdec_prepare_fdt()); 394 return 0; 395 } 396 397 /* 398 * This function is a little odd in that it accesses global data. At some 399 * point if the architecture board.c files merge this will make more sense. 400 * Even now, it is common code. 401 */ 402 int fdtdec_prepare_fdt(void) 403 { 404 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 405 fdt_check_header(gd->fdt_blob)) { 406 printf("No valid FDT found - please append one to U-Boot " 407 "binary, use u-boot-dtb.bin or define " 408 "CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n"); 409 return -1; 410 } 411 return 0; 412 } 413 414 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 415 { 416 const u32 *phandle; 417 int lookup; 418 419 debug("%s: %s\n", __func__, prop_name); 420 phandle = fdt_getprop(blob, node, prop_name, NULL); 421 if (!phandle) 422 return -FDT_ERR_NOTFOUND; 423 424 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 425 return lookup; 426 } 427 428 /** 429 * Look up a property in a node and check that it has a minimum length. 430 * 431 * @param blob FDT blob 432 * @param node node to examine 433 * @param prop_name name of property to find 434 * @param min_len minimum property length in bytes 435 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 436 found, or -FDT_ERR_BADLAYOUT if not enough data 437 * @return pointer to cell, which is only valid if err == 0 438 */ 439 static const void *get_prop_check_min_len(const void *blob, int node, 440 const char *prop_name, int min_len, int *err) 441 { 442 const void *cell; 443 int len; 444 445 debug("%s: %s\n", __func__, prop_name); 446 cell = fdt_getprop(blob, node, prop_name, &len); 447 if (!cell) 448 *err = -FDT_ERR_NOTFOUND; 449 else if (len < min_len) 450 *err = -FDT_ERR_BADLAYOUT; 451 else 452 *err = 0; 453 return cell; 454 } 455 456 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 457 u32 *array, int count) 458 { 459 const u32 *cell; 460 int i, err = 0; 461 462 debug("%s: %s\n", __func__, prop_name); 463 cell = get_prop_check_min_len(blob, node, prop_name, 464 sizeof(u32) * count, &err); 465 if (!err) { 466 for (i = 0; i < count; i++) 467 array[i] = fdt32_to_cpu(cell[i]); 468 } 469 return err; 470 } 471 472 const u32 *fdtdec_locate_array(const void *blob, int node, 473 const char *prop_name, int count) 474 { 475 const u32 *cell; 476 int err; 477 478 cell = get_prop_check_min_len(blob, node, prop_name, 479 sizeof(u32) * count, &err); 480 return err ? NULL : cell; 481 } 482 483 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 484 { 485 const s32 *cell; 486 int len; 487 488 debug("%s: %s\n", __func__, prop_name); 489 cell = fdt_getprop(blob, node, prop_name, &len); 490 return cell != NULL; 491 } 492 493 /** 494 * Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no 495 * terminating item. 496 * 497 * @param blob FDT blob to use 498 * @param node Node to look at 499 * @param prop_name Node property name 500 * @param gpio Array of gpio elements to fill from FDT. This will be 501 * untouched if either 0 or an error is returned 502 * @param max_count Maximum number of elements allowed 503 * @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would 504 * be exceeded, or -FDT_ERR_NOTFOUND if the property is missing. 505 */ 506 int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name, 507 struct fdt_gpio_state *gpio, int max_count) 508 { 509 const struct fdt_property *prop; 510 const u32 *cell; 511 const char *name; 512 int len, i; 513 514 debug("%s: %s\n", __func__, prop_name); 515 assert(max_count > 0); 516 prop = fdt_get_property(blob, node, prop_name, &len); 517 if (!prop) { 518 debug("%s: property '%s' missing\n", __func__, prop_name); 519 return -FDT_ERR_NOTFOUND; 520 } 521 522 /* We will use the name to tag the GPIO */ 523 name = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 524 cell = (u32 *)prop->data; 525 len /= sizeof(u32) * 3; /* 3 cells per GPIO record */ 526 if (len > max_count) { 527 debug(" %s: too many GPIOs / cells for " 528 "property '%s'\n", __func__, prop_name); 529 return -FDT_ERR_BADLAYOUT; 530 } 531 532 /* Read out the GPIO data from the cells */ 533 for (i = 0; i < len; i++, cell += 3) { 534 gpio[i].gpio = fdt32_to_cpu(cell[1]); 535 gpio[i].flags = fdt32_to_cpu(cell[2]); 536 gpio[i].name = name; 537 } 538 539 return len; 540 } 541 542 int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name, 543 struct fdt_gpio_state *gpio) 544 { 545 int err; 546 547 debug("%s: %s\n", __func__, prop_name); 548 gpio->gpio = FDT_GPIO_NONE; 549 gpio->name = NULL; 550 err = fdtdec_decode_gpios(blob, node, prop_name, gpio, 1); 551 return err == 1 ? 0 : err; 552 } 553 554 int fdtdec_get_gpio(struct fdt_gpio_state *gpio) 555 { 556 int val; 557 558 if (!fdt_gpio_isvalid(gpio)) 559 return -1; 560 561 val = gpio_get_value(gpio->gpio); 562 return gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val; 563 } 564 565 int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val) 566 { 567 if (!fdt_gpio_isvalid(gpio)) 568 return -1; 569 570 val = gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val; 571 return gpio_set_value(gpio->gpio, val); 572 } 573 574 int fdtdec_setup_gpio(struct fdt_gpio_state *gpio) 575 { 576 /* 577 * Return success if there is no GPIO defined. This is used for 578 * optional GPIOs) 579 */ 580 if (!fdt_gpio_isvalid(gpio)) 581 return 0; 582 583 if (gpio_request(gpio->gpio, gpio->name)) 584 return -1; 585 return 0; 586 } 587 588 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 589 u8 *array, int count) 590 { 591 const u8 *cell; 592 int err; 593 594 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 595 if (!err) 596 memcpy(array, cell, count); 597 return err; 598 } 599 600 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 601 const char *prop_name, int count) 602 { 603 const u8 *cell; 604 int err; 605 606 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 607 if (err) 608 return NULL; 609 return cell; 610 } 611 612 int fdtdec_get_config_int(const void *blob, const char *prop_name, 613 int default_val) 614 { 615 int config_node; 616 617 debug("%s: %s\n", __func__, prop_name); 618 config_node = fdt_path_offset(blob, "/config"); 619 if (config_node < 0) 620 return default_val; 621 return fdtdec_get_int(blob, config_node, prop_name, default_val); 622 } 623 624 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 625 { 626 int config_node; 627 const void *prop; 628 629 debug("%s: %s\n", __func__, prop_name); 630 config_node = fdt_path_offset(blob, "/config"); 631 if (config_node < 0) 632 return 0; 633 prop = fdt_get_property(blob, config_node, prop_name, NULL); 634 635 return prop != NULL; 636 } 637 638 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 639 { 640 const char *nodep; 641 int nodeoffset; 642 int len; 643 644 debug("%s: %s\n", __func__, prop_name); 645 nodeoffset = fdt_path_offset(blob, "/config"); 646 if (nodeoffset < 0) 647 return NULL; 648 649 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 650 if (!nodep) 651 return NULL; 652 653 return (char *)nodep; 654 } 655 656 int fdtdec_decode_region(const void *blob, int node, 657 const char *prop_name, void **ptrp, size_t *size) 658 { 659 const fdt_addr_t *cell; 660 int len; 661 662 debug("%s: %s\n", __func__, prop_name); 663 cell = fdt_getprop(blob, node, prop_name, &len); 664 if (!cell || (len != sizeof(fdt_addr_t) * 2)) 665 return -1; 666 667 *ptrp = map_sysmem(fdt_addr_to_cpu(*cell), *size); 668 *size = fdt_size_to_cpu(cell[1]); 669 debug("%s: size=%zx\n", __func__, *size); 670 return 0; 671 } 672 673 /** 674 * Read a flash entry from the fdt 675 * 676 * @param blob FDT blob 677 * @param node Offset of node to read 678 * @param name Name of node being read 679 * @param entry Place to put offset and size of this node 680 * @return 0 if ok, -ve on error 681 */ 682 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 683 struct fmap_entry *entry) 684 { 685 u32 reg[2]; 686 687 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 688 debug("Node '%s' has bad/missing 'reg' property\n", name); 689 return -FDT_ERR_NOTFOUND; 690 } 691 entry->offset = reg[0]; 692 entry->length = reg[1]; 693 694 return 0; 695 } 696 #endif 697