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 COMPAT(COMPAT_INTEL_LPC, "intel,lpc"), 76 COMPAT(INTEL_MICROCODE, "intel,microcode"), 77 COMPAT(MEMORY_SPD, "memory-spd"), 78 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"), 79 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"), 80 COMPAT(INTEL_GMA, "intel,gma"), 81 COMPAT(AMS_AS3722, "ams,as3722"), 82 }; 83 84 const char *fdtdec_get_compatible(enum fdt_compat_id id) 85 { 86 /* We allow reading of the 'unknown' ID for testing purposes */ 87 assert(id >= 0 && id < COMPAT_COUNT); 88 return compat_names[id]; 89 } 90 91 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 92 const char *prop_name, fdt_size_t *sizep) 93 { 94 const fdt_addr_t *cell; 95 int len; 96 97 debug("%s: %s: ", __func__, prop_name); 98 cell = fdt_getprop(blob, node, prop_name, &len); 99 if (cell && ((!sizep && len == sizeof(fdt_addr_t)) || 100 len == sizeof(fdt_addr_t) * 2)) { 101 fdt_addr_t addr = fdt_addr_to_cpu(*cell); 102 if (sizep) { 103 const fdt_size_t *size; 104 105 size = (fdt_size_t *)((char *)cell + 106 sizeof(fdt_addr_t)); 107 *sizep = fdt_size_to_cpu(*size); 108 debug("addr=%08lx, size=%08x\n", 109 (ulong)addr, *sizep); 110 } else { 111 debug("%08lx\n", (ulong)addr); 112 } 113 return addr; 114 } 115 debug("(not found)\n"); 116 return FDT_ADDR_T_NONE; 117 } 118 119 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 120 const char *prop_name) 121 { 122 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 123 } 124 125 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 126 uint64_t default_val) 127 { 128 const uint64_t *cell64; 129 int length; 130 131 cell64 = fdt_getprop(blob, node, prop_name, &length); 132 if (!cell64 || length < sizeof(*cell64)) 133 return default_val; 134 135 return fdt64_to_cpu(*cell64); 136 } 137 138 int fdtdec_get_is_enabled(const void *blob, int node) 139 { 140 const char *cell; 141 142 /* 143 * It should say "okay", so only allow that. Some fdts use "ok" but 144 * this is a bug. Please fix your device tree source file. See here 145 * for discussion: 146 * 147 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 148 */ 149 cell = fdt_getprop(blob, node, "status", NULL); 150 if (cell) 151 return 0 == strcmp(cell, "okay"); 152 return 1; 153 } 154 155 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 156 { 157 enum fdt_compat_id id; 158 159 /* Search our drivers */ 160 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 161 if (0 == fdt_node_check_compatible(blob, node, 162 compat_names[id])) 163 return id; 164 return COMPAT_UNKNOWN; 165 } 166 167 int fdtdec_next_compatible(const void *blob, int node, 168 enum fdt_compat_id id) 169 { 170 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 171 } 172 173 int fdtdec_next_compatible_subnode(const void *blob, int node, 174 enum fdt_compat_id id, int *depthp) 175 { 176 do { 177 node = fdt_next_node(blob, node, depthp); 178 } while (*depthp > 1); 179 180 /* If this is a direct subnode, and compatible, return it */ 181 if (*depthp == 1 && 0 == fdt_node_check_compatible( 182 blob, node, compat_names[id])) 183 return node; 184 185 return -FDT_ERR_NOTFOUND; 186 } 187 188 int fdtdec_next_alias(const void *blob, const char *name, 189 enum fdt_compat_id id, int *upto) 190 { 191 #define MAX_STR_LEN 20 192 char str[MAX_STR_LEN + 20]; 193 int node, err; 194 195 /* snprintf() is not available */ 196 assert(strlen(name) < MAX_STR_LEN); 197 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 198 node = fdt_path_offset(blob, str); 199 if (node < 0) 200 return node; 201 err = fdt_node_check_compatible(blob, node, compat_names[id]); 202 if (err < 0) 203 return err; 204 if (err) 205 return -FDT_ERR_NOTFOUND; 206 (*upto)++; 207 return node; 208 } 209 210 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 211 enum fdt_compat_id id, int *node_list, int maxcount) 212 { 213 memset(node_list, '\0', sizeof(*node_list) * maxcount); 214 215 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 216 } 217 218 /* TODO: Can we tighten this code up a little? */ 219 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 220 enum fdt_compat_id id, int *node_list, int maxcount) 221 { 222 int name_len = strlen(name); 223 int nodes[maxcount]; 224 int num_found = 0; 225 int offset, node; 226 int alias_node; 227 int count; 228 int i, j; 229 230 /* find the alias node if present */ 231 alias_node = fdt_path_offset(blob, "/aliases"); 232 233 /* 234 * start with nothing, and we can assume that the root node can't 235 * match 236 */ 237 memset(nodes, '\0', sizeof(nodes)); 238 239 /* First find all the compatible nodes */ 240 for (node = count = 0; node >= 0 && count < maxcount;) { 241 node = fdtdec_next_compatible(blob, node, id); 242 if (node >= 0) 243 nodes[count++] = node; 244 } 245 if (node >= 0) 246 debug("%s: warning: maxcount exceeded with alias '%s'\n", 247 __func__, name); 248 249 /* Now find all the aliases */ 250 for (offset = fdt_first_property_offset(blob, alias_node); 251 offset > 0; 252 offset = fdt_next_property_offset(blob, offset)) { 253 const struct fdt_property *prop; 254 const char *path; 255 int number; 256 int found; 257 258 node = 0; 259 prop = fdt_get_property_by_offset(blob, offset, NULL); 260 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 261 if (prop->len && 0 == strncmp(path, name, name_len)) 262 node = fdt_path_offset(blob, prop->data); 263 if (node <= 0) 264 continue; 265 266 /* Get the alias number */ 267 number = simple_strtoul(path + name_len, NULL, 10); 268 if (number < 0 || number >= maxcount) { 269 debug("%s: warning: alias '%s' is out of range\n", 270 __func__, path); 271 continue; 272 } 273 274 /* Make sure the node we found is actually in our list! */ 275 found = -1; 276 for (j = 0; j < count; j++) 277 if (nodes[j] == node) { 278 found = j; 279 break; 280 } 281 282 if (found == -1) { 283 debug("%s: warning: alias '%s' points to a node " 284 "'%s' that is missing or is not compatible " 285 " with '%s'\n", __func__, path, 286 fdt_get_name(blob, node, NULL), 287 compat_names[id]); 288 continue; 289 } 290 291 /* 292 * Add this node to our list in the right place, and mark 293 * it as done. 294 */ 295 if (fdtdec_get_is_enabled(blob, node)) { 296 if (node_list[number]) { 297 debug("%s: warning: alias '%s' requires that " 298 "a node be placed in the list in a " 299 "position which is already filled by " 300 "node '%s'\n", __func__, path, 301 fdt_get_name(blob, node, NULL)); 302 continue; 303 } 304 node_list[number] = node; 305 if (number >= num_found) 306 num_found = number + 1; 307 } 308 nodes[found] = 0; 309 } 310 311 /* Add any nodes not mentioned by an alias */ 312 for (i = j = 0; i < maxcount; i++) { 313 if (!node_list[i]) { 314 for (; j < maxcount; j++) 315 if (nodes[j] && 316 fdtdec_get_is_enabled(blob, nodes[j])) 317 break; 318 319 /* Have we run out of nodes to add? */ 320 if (j == maxcount) 321 break; 322 323 assert(!node_list[i]); 324 node_list[i] = nodes[j++]; 325 if (i >= num_found) 326 num_found = i + 1; 327 } 328 } 329 330 return num_found; 331 } 332 333 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 334 int *seqp) 335 { 336 int base_len = strlen(base); 337 const char *find_name; 338 int find_namelen; 339 int prop_offset; 340 int aliases; 341 342 find_name = fdt_get_name(blob, offset, &find_namelen); 343 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 344 345 aliases = fdt_path_offset(blob, "/aliases"); 346 for (prop_offset = fdt_first_property_offset(blob, aliases); 347 prop_offset > 0; 348 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 349 const char *prop; 350 const char *name; 351 const char *slash; 352 const char *p; 353 int len; 354 355 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 356 debug(" - %s, %s\n", name, prop); 357 if (len < find_namelen || *prop != '/' || prop[len - 1] || 358 strncmp(name, base, base_len)) 359 continue; 360 361 slash = strrchr(prop, '/'); 362 if (strcmp(slash + 1, find_name)) 363 continue; 364 for (p = name + strlen(name) - 1; p > name; p--) { 365 if (!isdigit(*p)) { 366 *seqp = simple_strtoul(p + 1, NULL, 10); 367 debug("Found seq %d\n", *seqp); 368 return 0; 369 } 370 } 371 } 372 373 debug("Not found\n"); 374 return -ENOENT; 375 } 376 377 int fdtdec_get_chosen_node(const void *blob, const char *name) 378 { 379 const char *prop; 380 int chosen_node; 381 int len; 382 383 if (!blob) 384 return -FDT_ERR_NOTFOUND; 385 chosen_node = fdt_path_offset(blob, "/chosen"); 386 prop = fdt_getprop(blob, chosen_node, name, &len); 387 if (!prop) 388 return -FDT_ERR_NOTFOUND; 389 return fdt_path_offset(blob, prop); 390 } 391 392 int fdtdec_check_fdt(void) 393 { 394 /* 395 * We must have an FDT, but we cannot panic() yet since the console 396 * is not ready. So for now, just assert(). Boards which need an early 397 * FDT (prior to console ready) will need to make their own 398 * arrangements and do their own checks. 399 */ 400 assert(!fdtdec_prepare_fdt()); 401 return 0; 402 } 403 404 /* 405 * This function is a little odd in that it accesses global data. At some 406 * point if the architecture board.c files merge this will make more sense. 407 * Even now, it is common code. 408 */ 409 int fdtdec_prepare_fdt(void) 410 { 411 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 412 fdt_check_header(gd->fdt_blob)) { 413 printf("No valid FDT found - please append one to U-Boot " 414 "binary, use u-boot-dtb.bin or define " 415 "CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n"); 416 return -1; 417 } 418 return 0; 419 } 420 421 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 422 { 423 const u32 *phandle; 424 int lookup; 425 426 debug("%s: %s\n", __func__, prop_name); 427 phandle = fdt_getprop(blob, node, prop_name, NULL); 428 if (!phandle) 429 return -FDT_ERR_NOTFOUND; 430 431 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 432 return lookup; 433 } 434 435 /** 436 * Look up a property in a node and check that it has a minimum length. 437 * 438 * @param blob FDT blob 439 * @param node node to examine 440 * @param prop_name name of property to find 441 * @param min_len minimum property length in bytes 442 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 443 found, or -FDT_ERR_BADLAYOUT if not enough data 444 * @return pointer to cell, which is only valid if err == 0 445 */ 446 static const void *get_prop_check_min_len(const void *blob, int node, 447 const char *prop_name, int min_len, int *err) 448 { 449 const void *cell; 450 int len; 451 452 debug("%s: %s\n", __func__, prop_name); 453 cell = fdt_getprop(blob, node, prop_name, &len); 454 if (!cell) 455 *err = -FDT_ERR_NOTFOUND; 456 else if (len < min_len) 457 *err = -FDT_ERR_BADLAYOUT; 458 else 459 *err = 0; 460 return cell; 461 } 462 463 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 464 u32 *array, int count) 465 { 466 const u32 *cell; 467 int i, err = 0; 468 469 debug("%s: %s\n", __func__, prop_name); 470 cell = get_prop_check_min_len(blob, node, prop_name, 471 sizeof(u32) * count, &err); 472 if (!err) { 473 for (i = 0; i < count; i++) 474 array[i] = fdt32_to_cpu(cell[i]); 475 } 476 return err; 477 } 478 479 int fdtdec_get_int_array_count(const void *blob, int node, 480 const char *prop_name, u32 *array, int count) 481 { 482 const u32 *cell; 483 int len, elems; 484 int i; 485 486 debug("%s: %s\n", __func__, prop_name); 487 cell = fdt_getprop(blob, node, prop_name, &len); 488 if (!cell) 489 return -FDT_ERR_NOTFOUND; 490 elems = len / sizeof(u32); 491 if (count > elems) 492 count = elems; 493 for (i = 0; i < count; i++) 494 array[i] = fdt32_to_cpu(cell[i]); 495 496 return count; 497 } 498 499 const u32 *fdtdec_locate_array(const void *blob, int node, 500 const char *prop_name, int count) 501 { 502 const u32 *cell; 503 int err; 504 505 cell = get_prop_check_min_len(blob, node, prop_name, 506 sizeof(u32) * count, &err); 507 return err ? NULL : cell; 508 } 509 510 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 511 { 512 const s32 *cell; 513 int len; 514 515 debug("%s: %s\n", __func__, prop_name); 516 cell = fdt_getprop(blob, node, prop_name, &len); 517 return cell != NULL; 518 } 519 520 /** 521 * Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no 522 * terminating item. 523 * 524 * @param blob FDT blob to use 525 * @param node Node to look at 526 * @param prop_name Node property name 527 * @param gpio Array of gpio elements to fill from FDT. This will be 528 * untouched if either 0 or an error is returned 529 * @param max_count Maximum number of elements allowed 530 * @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would 531 * be exceeded, or -FDT_ERR_NOTFOUND if the property is missing. 532 */ 533 int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name, 534 struct fdt_gpio_state *gpio, int max_count) 535 { 536 const struct fdt_property *prop; 537 const u32 *cell; 538 const char *name; 539 int len, i; 540 541 debug("%s: %s\n", __func__, prop_name); 542 assert(max_count > 0); 543 prop = fdt_get_property(blob, node, prop_name, &len); 544 if (!prop) { 545 debug("%s: property '%s' missing\n", __func__, prop_name); 546 return -FDT_ERR_NOTFOUND; 547 } 548 549 /* We will use the name to tag the GPIO */ 550 name = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 551 cell = (u32 *)prop->data; 552 len /= sizeof(u32) * 3; /* 3 cells per GPIO record */ 553 if (len > max_count) { 554 debug(" %s: too many GPIOs / cells for " 555 "property '%s'\n", __func__, prop_name); 556 return -FDT_ERR_BADLAYOUT; 557 } 558 559 /* Read out the GPIO data from the cells */ 560 for (i = 0; i < len; i++, cell += 3) { 561 gpio[i].gpio = fdt32_to_cpu(cell[1]); 562 gpio[i].flags = fdt32_to_cpu(cell[2]); 563 gpio[i].name = name; 564 } 565 566 return len; 567 } 568 569 int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name, 570 struct fdt_gpio_state *gpio) 571 { 572 int err; 573 574 debug("%s: %s\n", __func__, prop_name); 575 gpio->gpio = FDT_GPIO_NONE; 576 gpio->name = NULL; 577 err = fdtdec_decode_gpios(blob, node, prop_name, gpio, 1); 578 return err == 1 ? 0 : err; 579 } 580 581 int fdtdec_get_gpio(struct fdt_gpio_state *gpio) 582 { 583 int val; 584 585 if (!fdt_gpio_isvalid(gpio)) 586 return -1; 587 588 val = gpio_get_value(gpio->gpio); 589 return gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val; 590 } 591 592 int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val) 593 { 594 if (!fdt_gpio_isvalid(gpio)) 595 return -1; 596 597 val = gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val; 598 return gpio_set_value(gpio->gpio, val); 599 } 600 601 int fdtdec_setup_gpio(struct fdt_gpio_state *gpio) 602 { 603 /* 604 * Return success if there is no GPIO defined. This is used for 605 * optional GPIOs) 606 */ 607 if (!fdt_gpio_isvalid(gpio)) 608 return 0; 609 610 if (gpio_request(gpio->gpio, gpio->name)) 611 return -1; 612 return 0; 613 } 614 615 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 616 u8 *array, int count) 617 { 618 const u8 *cell; 619 int err; 620 621 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 622 if (!err) 623 memcpy(array, cell, count); 624 return err; 625 } 626 627 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 628 const char *prop_name, int count) 629 { 630 const u8 *cell; 631 int err; 632 633 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 634 if (err) 635 return NULL; 636 return cell; 637 } 638 639 int fdtdec_get_config_int(const void *blob, const char *prop_name, 640 int default_val) 641 { 642 int config_node; 643 644 debug("%s: %s\n", __func__, prop_name); 645 config_node = fdt_path_offset(blob, "/config"); 646 if (config_node < 0) 647 return default_val; 648 return fdtdec_get_int(blob, config_node, prop_name, default_val); 649 } 650 651 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 652 { 653 int config_node; 654 const void *prop; 655 656 debug("%s: %s\n", __func__, prop_name); 657 config_node = fdt_path_offset(blob, "/config"); 658 if (config_node < 0) 659 return 0; 660 prop = fdt_get_property(blob, config_node, prop_name, NULL); 661 662 return prop != NULL; 663 } 664 665 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 666 { 667 const char *nodep; 668 int nodeoffset; 669 int len; 670 671 debug("%s: %s\n", __func__, prop_name); 672 nodeoffset = fdt_path_offset(blob, "/config"); 673 if (nodeoffset < 0) 674 return NULL; 675 676 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 677 if (!nodep) 678 return NULL; 679 680 return (char *)nodep; 681 } 682 683 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 684 fdt_addr_t *basep, fdt_size_t *sizep) 685 { 686 const fdt_addr_t *cell; 687 int len; 688 689 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 690 prop_name); 691 cell = fdt_getprop(blob, node, prop_name, &len); 692 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 693 debug("cell=%p, len=%d\n", cell, len); 694 return -1; 695 } 696 697 *basep = fdt_addr_to_cpu(*cell); 698 *sizep = fdt_size_to_cpu(cell[1]); 699 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 700 (ulong)*sizep); 701 702 return 0; 703 } 704 705 /** 706 * Read a flash entry from the fdt 707 * 708 * @param blob FDT blob 709 * @param node Offset of node to read 710 * @param name Name of node being read 711 * @param entry Place to put offset and size of this node 712 * @return 0 if ok, -ve on error 713 */ 714 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 715 struct fmap_entry *entry) 716 { 717 const char *prop; 718 u32 reg[2]; 719 720 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 721 debug("Node '%s' has bad/missing 'reg' property\n", name); 722 return -FDT_ERR_NOTFOUND; 723 } 724 entry->offset = reg[0]; 725 entry->length = reg[1]; 726 entry->used = fdtdec_get_int(blob, node, "used", entry->length); 727 prop = fdt_getprop(blob, node, "compress", NULL); 728 entry->compress_algo = prop && !strcmp(prop, "lzo") ? 729 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; 730 prop = fdt_getprop(blob, node, "hash", &entry->hash_size); 731 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; 732 entry->hash = (uint8_t *)prop; 733 734 return 0; 735 } 736 737 static u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 738 { 739 u64 number = 0; 740 741 while (cells--) 742 number = (number << 32) | fdt32_to_cpu(*ptr++); 743 744 return number; 745 } 746 747 int fdt_get_resource(const void *fdt, int node, const char *property, 748 unsigned int index, struct fdt_resource *res) 749 { 750 const fdt32_t *ptr, *end; 751 int na, ns, len, parent; 752 unsigned int i = 0; 753 754 parent = fdt_parent_offset(fdt, node); 755 if (parent < 0) 756 return parent; 757 758 na = fdt_address_cells(fdt, parent); 759 ns = fdt_size_cells(fdt, parent); 760 761 ptr = fdt_getprop(fdt, node, property, &len); 762 if (!ptr) 763 return len; 764 765 end = ptr + len / sizeof(*ptr); 766 767 while (ptr + na + ns <= end) { 768 if (i == index) { 769 res->start = res->end = fdtdec_get_number(ptr, na); 770 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 771 return 0; 772 } 773 774 ptr += na + ns; 775 i++; 776 } 777 778 return -FDT_ERR_NOTFOUND; 779 } 780 781 int fdt_get_named_resource(const void *fdt, int node, const char *property, 782 const char *prop_names, const char *name, 783 struct fdt_resource *res) 784 { 785 int index; 786 787 index = fdt_find_string(fdt, node, prop_names, name); 788 if (index < 0) 789 return index; 790 791 return fdt_get_resource(fdt, node, property, index, res); 792 } 793 794 int fdtdec_pci_get_bdf(const void *fdt, int node, int *bdf) 795 { 796 const fdt32_t *prop; 797 int len; 798 799 prop = fdt_getprop(fdt, node, "reg", &len); 800 if (!prop) 801 return len; 802 803 *bdf = fdt32_to_cpu(*prop) & 0xffffff; 804 805 return 0; 806 } 807 808 int fdtdec_decode_memory_region(const void *blob, int config_node, 809 const char *mem_type, const char *suffix, 810 fdt_addr_t *basep, fdt_size_t *sizep) 811 { 812 char prop_name[50]; 813 const char *mem; 814 fdt_size_t size, offset_size; 815 fdt_addr_t base, offset; 816 int node; 817 818 if (config_node == -1) { 819 config_node = fdt_path_offset(blob, "/config"); 820 if (config_node < 0) { 821 debug("%s: Cannot find /config node\n", __func__); 822 return -ENOENT; 823 } 824 } 825 if (!suffix) 826 suffix = ""; 827 828 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 829 suffix); 830 mem = fdt_getprop(blob, config_node, prop_name, NULL); 831 if (!mem) { 832 debug("%s: No memory type for '%s', using /memory\n", __func__, 833 prop_name); 834 mem = "/memory"; 835 } 836 837 node = fdt_path_offset(blob, mem); 838 if (node < 0) { 839 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 840 fdt_strerror(node)); 841 return -ENOENT; 842 } 843 844 /* 845 * Not strictly correct - the memory may have multiple banks. We just 846 * use the first 847 */ 848 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 849 debug("%s: Failed to decode memory region %s\n", __func__, 850 mem); 851 return -EINVAL; 852 } 853 854 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 855 suffix); 856 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 857 &offset_size)) { 858 debug("%s: Failed to decode memory region '%s'\n", __func__, 859 prop_name); 860 return -EINVAL; 861 } 862 863 *basep = base + offset; 864 *sizep = offset_size; 865 866 return 0; 867 } 868 #endif 869