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_TEGRA114_I2C, "nvidia,tegra114-i2c"), 28 COMPAT(NVIDIA_TEGRA20_I2C, "nvidia,tegra20-i2c"), 29 COMPAT(NVIDIA_TEGRA20_DVC, "nvidia,tegra20-i2c-dvc"), 30 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"), 31 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"), 32 COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"), 33 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"), 34 COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"), 35 COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"), 36 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"), 37 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"), 38 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"), 39 COMPAT(NVIDIA_TEGRA20_SFLASH, "nvidia,tegra20-sflash"), 40 COMPAT(NVIDIA_TEGRA20_SLINK, "nvidia,tegra20-slink"), 41 COMPAT(NVIDIA_TEGRA114_SPI, "nvidia,tegra114-spi"), 42 COMPAT(NVIDIA_TEGRA124_PCIE, "nvidia,tegra124-pcie"), 43 COMPAT(NVIDIA_TEGRA30_PCIE, "nvidia,tegra30-pcie"), 44 COMPAT(NVIDIA_TEGRA20_PCIE, "nvidia,tegra20-pcie"), 45 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"), 46 COMPAT(SMSC_LAN9215, "smsc,lan9215"), 47 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), 48 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), 49 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), 50 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), 51 COMPAT(SAMSUNG_EXYNOS_SPI, "samsung,exynos-spi"), 52 COMPAT(GOOGLE_CROS_EC, "google,cros-ec"), 53 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"), 54 COMPAT(SAMSUNG_EXYNOS_EHCI, "samsung,exynos-ehci"), 55 COMPAT(SAMSUNG_EXYNOS5_XHCI, "samsung,exynos5250-xhci"), 56 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), 57 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"), 58 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), 59 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"), 60 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"), 61 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"), 62 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), 63 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), 64 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"), 65 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"), 66 COMPAT(GENERIC_SPI_FLASH, "spi-flash"), 67 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), 68 COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"), 69 COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645-tpm"), 70 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), 71 COMPAT(SANDBOX_HOST_EMULATION, "sandbox,host-emulation"), 72 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"), 73 COMPAT(TI_TPS65090, "ti,tps65090"), 74 COMPAT(COMPAT_NXP_PTN3460, "nxp,ptn3460"), 75 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), 76 COMPAT(PARADE_PS8625, "parade,ps8625"), 77 COMPAT(COMPAT_INTEL_LPC, "intel,lpc"), 78 COMPAT(INTEL_MICROCODE, "intel,microcode"), 79 COMPAT(MEMORY_SPD, "memory-spd"), 80 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"), 81 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"), 82 COMPAT(INTEL_GMA, "intel,gma"), 83 COMPAT(AMS_AS3722, "ams,as3722"), 84 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"), 85 }; 86 87 const char *fdtdec_get_compatible(enum fdt_compat_id id) 88 { 89 /* We allow reading of the 'unknown' ID for testing purposes */ 90 assert(id >= 0 && id < COMPAT_COUNT); 91 return compat_names[id]; 92 } 93 94 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 95 const char *prop_name, fdt_size_t *sizep) 96 { 97 const fdt_addr_t *cell; 98 int len; 99 100 debug("%s: %s: ", __func__, prop_name); 101 cell = fdt_getprop(blob, node, prop_name, &len); 102 if (cell && ((!sizep && len == sizeof(fdt_addr_t)) || 103 len == sizeof(fdt_addr_t) * 2)) { 104 fdt_addr_t addr = fdt_addr_to_cpu(*cell); 105 if (sizep) { 106 const fdt_size_t *size; 107 108 size = (fdt_size_t *)((char *)cell + 109 sizeof(fdt_addr_t)); 110 *sizep = fdt_size_to_cpu(*size); 111 debug("addr=%08lx, size=%08x\n", 112 (ulong)addr, *sizep); 113 } else { 114 debug("%08lx\n", (ulong)addr); 115 } 116 return addr; 117 } 118 debug("(not found)\n"); 119 return FDT_ADDR_T_NONE; 120 } 121 122 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 123 const char *prop_name) 124 { 125 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 126 } 127 128 #ifdef CONFIG_PCI 129 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 130 const char *prop_name, struct fdt_pci_addr *addr) 131 { 132 const u32 *cell; 133 int len; 134 int ret = -ENOENT; 135 136 debug("%s: %s: ", __func__, prop_name); 137 138 /* 139 * If we follow the pci bus bindings strictly, we should check 140 * the value of the node's parent node's #address-cells and 141 * #size-cells. They need to be 3 and 2 accordingly. However, 142 * for simplicity we skip the check here. 143 */ 144 cell = fdt_getprop(blob, node, prop_name, &len); 145 if (!cell) 146 goto fail; 147 148 if ((len % FDT_PCI_REG_SIZE) == 0) { 149 int num = len / FDT_PCI_REG_SIZE; 150 int i; 151 152 for (i = 0; i < num; i++) { 153 debug("pci address #%d: %08lx %08lx %08lx\n", i, 154 (ulong)fdt_addr_to_cpu(cell[0]), 155 (ulong)fdt_addr_to_cpu(cell[1]), 156 (ulong)fdt_addr_to_cpu(cell[2])); 157 if ((fdt_addr_to_cpu(*cell) & type) == type) { 158 addr->phys_hi = fdt_addr_to_cpu(cell[0]); 159 addr->phys_mid = fdt_addr_to_cpu(cell[1]); 160 addr->phys_lo = fdt_addr_to_cpu(cell[2]); 161 break; 162 } else { 163 cell += (FDT_PCI_ADDR_CELLS + 164 FDT_PCI_SIZE_CELLS); 165 } 166 } 167 168 if (i == num) 169 goto fail; 170 171 return 0; 172 } else { 173 ret = -EINVAL; 174 } 175 176 fail: 177 debug("(not found)\n"); 178 return ret; 179 } 180 181 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 182 { 183 const char *list, *end; 184 int len; 185 186 list = fdt_getprop(blob, node, "compatible", &len); 187 if (!list) 188 return -ENOENT; 189 190 end = list + len; 191 while (list < end) { 192 char *s; 193 194 len = strlen(list); 195 if (len >= strlen("pciVVVV,DDDD")) { 196 s = strstr(list, "pci"); 197 198 /* 199 * check if the string is something like pciVVVV,DDDD.RR 200 * or just pciVVVV,DDDD 201 */ 202 if (s && s[7] == ',' && 203 (s[12] == '.' || s[12] == 0)) { 204 s += 3; 205 *vendor = simple_strtol(s, NULL, 16); 206 207 s += 5; 208 *device = simple_strtol(s, NULL, 16); 209 210 return 0; 211 } 212 } else { 213 list += (len + 1); 214 } 215 } 216 217 return -ENOENT; 218 } 219 220 int fdtdec_get_pci_bdf(const void *blob, int node, 221 struct fdt_pci_addr *addr, pci_dev_t *bdf) 222 { 223 u16 dt_vendor, dt_device, vendor, device; 224 int ret; 225 226 /* get vendor id & device id from the compatible string */ 227 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device); 228 if (ret) 229 return ret; 230 231 /* extract the bdf from fdt_pci_addr */ 232 *bdf = addr->phys_hi & 0xffff00; 233 234 /* read vendor id & device id based on bdf */ 235 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor); 236 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device); 237 238 /* 239 * Note there are two places in the device tree to fully describe 240 * a pci device: one is via compatible string with a format of 241 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in 242 * the device node's reg address property. We read the vendor id 243 * and device id based on bdf and compare the values with the 244 * "VVVV,DDDD". If they are the same, then we are good to use bdf 245 * to read device's bar. But if they are different, we have to rely 246 * on the vendor id and device id extracted from the compatible 247 * string and locate the real bdf by pci_find_device(). This is 248 * because normally we may only know device's device number and 249 * function number when writing device tree. The bus number is 250 * dynamically assigned during the pci enumeration process. 251 */ 252 if ((dt_vendor != vendor) || (dt_device != device)) { 253 *bdf = pci_find_device(dt_vendor, dt_device, 0); 254 if (*bdf == -1) 255 return -ENODEV; 256 } 257 258 return 0; 259 } 260 261 int fdtdec_get_pci_bar32(const void *blob, int node, 262 struct fdt_pci_addr *addr, u32 *bar) 263 { 264 pci_dev_t bdf; 265 int barnum; 266 int ret; 267 268 /* get pci devices's bdf */ 269 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf); 270 if (ret) 271 return ret; 272 273 /* extract the bar number from fdt_pci_addr */ 274 barnum = addr->phys_hi & 0xff; 275 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) 276 return -EINVAL; 277 278 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; 279 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum); 280 281 return 0; 282 } 283 #endif 284 285 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 286 uint64_t default_val) 287 { 288 const uint64_t *cell64; 289 int length; 290 291 cell64 = fdt_getprop(blob, node, prop_name, &length); 292 if (!cell64 || length < sizeof(*cell64)) 293 return default_val; 294 295 return fdt64_to_cpu(*cell64); 296 } 297 298 int fdtdec_get_is_enabled(const void *blob, int node) 299 { 300 const char *cell; 301 302 /* 303 * It should say "okay", so only allow that. Some fdts use "ok" but 304 * this is a bug. Please fix your device tree source file. See here 305 * for discussion: 306 * 307 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 308 */ 309 cell = fdt_getprop(blob, node, "status", NULL); 310 if (cell) 311 return 0 == strcmp(cell, "okay"); 312 return 1; 313 } 314 315 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 316 { 317 enum fdt_compat_id id; 318 319 /* Search our drivers */ 320 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 321 if (0 == fdt_node_check_compatible(blob, node, 322 compat_names[id])) 323 return id; 324 return COMPAT_UNKNOWN; 325 } 326 327 int fdtdec_next_compatible(const void *blob, int node, 328 enum fdt_compat_id id) 329 { 330 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 331 } 332 333 int fdtdec_next_compatible_subnode(const void *blob, int node, 334 enum fdt_compat_id id, int *depthp) 335 { 336 do { 337 node = fdt_next_node(blob, node, depthp); 338 } while (*depthp > 1); 339 340 /* If this is a direct subnode, and compatible, return it */ 341 if (*depthp == 1 && 0 == fdt_node_check_compatible( 342 blob, node, compat_names[id])) 343 return node; 344 345 return -FDT_ERR_NOTFOUND; 346 } 347 348 int fdtdec_next_alias(const void *blob, const char *name, 349 enum fdt_compat_id id, int *upto) 350 { 351 #define MAX_STR_LEN 20 352 char str[MAX_STR_LEN + 20]; 353 int node, err; 354 355 /* snprintf() is not available */ 356 assert(strlen(name) < MAX_STR_LEN); 357 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 358 node = fdt_path_offset(blob, str); 359 if (node < 0) 360 return node; 361 err = fdt_node_check_compatible(blob, node, compat_names[id]); 362 if (err < 0) 363 return err; 364 if (err) 365 return -FDT_ERR_NOTFOUND; 366 (*upto)++; 367 return node; 368 } 369 370 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 371 enum fdt_compat_id id, int *node_list, int maxcount) 372 { 373 memset(node_list, '\0', sizeof(*node_list) * maxcount); 374 375 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 376 } 377 378 /* TODO: Can we tighten this code up a little? */ 379 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 380 enum fdt_compat_id id, int *node_list, int maxcount) 381 { 382 int name_len = strlen(name); 383 int nodes[maxcount]; 384 int num_found = 0; 385 int offset, node; 386 int alias_node; 387 int count; 388 int i, j; 389 390 /* find the alias node if present */ 391 alias_node = fdt_path_offset(blob, "/aliases"); 392 393 /* 394 * start with nothing, and we can assume that the root node can't 395 * match 396 */ 397 memset(nodes, '\0', sizeof(nodes)); 398 399 /* First find all the compatible nodes */ 400 for (node = count = 0; node >= 0 && count < maxcount;) { 401 node = fdtdec_next_compatible(blob, node, id); 402 if (node >= 0) 403 nodes[count++] = node; 404 } 405 if (node >= 0) 406 debug("%s: warning: maxcount exceeded with alias '%s'\n", 407 __func__, name); 408 409 /* Now find all the aliases */ 410 for (offset = fdt_first_property_offset(blob, alias_node); 411 offset > 0; 412 offset = fdt_next_property_offset(blob, offset)) { 413 const struct fdt_property *prop; 414 const char *path; 415 int number; 416 int found; 417 418 node = 0; 419 prop = fdt_get_property_by_offset(blob, offset, NULL); 420 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 421 if (prop->len && 0 == strncmp(path, name, name_len)) 422 node = fdt_path_offset(blob, prop->data); 423 if (node <= 0) 424 continue; 425 426 /* Get the alias number */ 427 number = simple_strtoul(path + name_len, NULL, 10); 428 if (number < 0 || number >= maxcount) { 429 debug("%s: warning: alias '%s' is out of range\n", 430 __func__, path); 431 continue; 432 } 433 434 /* Make sure the node we found is actually in our list! */ 435 found = -1; 436 for (j = 0; j < count; j++) 437 if (nodes[j] == node) { 438 found = j; 439 break; 440 } 441 442 if (found == -1) { 443 debug("%s: warning: alias '%s' points to a node " 444 "'%s' that is missing or is not compatible " 445 " with '%s'\n", __func__, path, 446 fdt_get_name(blob, node, NULL), 447 compat_names[id]); 448 continue; 449 } 450 451 /* 452 * Add this node to our list in the right place, and mark 453 * it as done. 454 */ 455 if (fdtdec_get_is_enabled(blob, node)) { 456 if (node_list[number]) { 457 debug("%s: warning: alias '%s' requires that " 458 "a node be placed in the list in a " 459 "position which is already filled by " 460 "node '%s'\n", __func__, path, 461 fdt_get_name(blob, node, NULL)); 462 continue; 463 } 464 node_list[number] = node; 465 if (number >= num_found) 466 num_found = number + 1; 467 } 468 nodes[found] = 0; 469 } 470 471 /* Add any nodes not mentioned by an alias */ 472 for (i = j = 0; i < maxcount; i++) { 473 if (!node_list[i]) { 474 for (; j < maxcount; j++) 475 if (nodes[j] && 476 fdtdec_get_is_enabled(blob, nodes[j])) 477 break; 478 479 /* Have we run out of nodes to add? */ 480 if (j == maxcount) 481 break; 482 483 assert(!node_list[i]); 484 node_list[i] = nodes[j++]; 485 if (i >= num_found) 486 num_found = i + 1; 487 } 488 } 489 490 return num_found; 491 } 492 493 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 494 int *seqp) 495 { 496 int base_len = strlen(base); 497 const char *find_name; 498 int find_namelen; 499 int prop_offset; 500 int aliases; 501 502 find_name = fdt_get_name(blob, offset, &find_namelen); 503 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 504 505 aliases = fdt_path_offset(blob, "/aliases"); 506 for (prop_offset = fdt_first_property_offset(blob, aliases); 507 prop_offset > 0; 508 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 509 const char *prop; 510 const char *name; 511 const char *slash; 512 const char *p; 513 int len; 514 515 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 516 debug(" - %s, %s\n", name, prop); 517 if (len < find_namelen || *prop != '/' || prop[len - 1] || 518 strncmp(name, base, base_len)) 519 continue; 520 521 slash = strrchr(prop, '/'); 522 if (strcmp(slash + 1, find_name)) 523 continue; 524 for (p = name + strlen(name) - 1; p > name; p--) { 525 if (!isdigit(*p)) { 526 *seqp = simple_strtoul(p + 1, NULL, 10); 527 debug("Found seq %d\n", *seqp); 528 return 0; 529 } 530 } 531 } 532 533 debug("Not found\n"); 534 return -ENOENT; 535 } 536 537 int fdtdec_get_chosen_node(const void *blob, const char *name) 538 { 539 const char *prop; 540 int chosen_node; 541 int len; 542 543 if (!blob) 544 return -FDT_ERR_NOTFOUND; 545 chosen_node = fdt_path_offset(blob, "/chosen"); 546 prop = fdt_getprop(blob, chosen_node, name, &len); 547 if (!prop) 548 return -FDT_ERR_NOTFOUND; 549 return fdt_path_offset(blob, prop); 550 } 551 552 int fdtdec_check_fdt(void) 553 { 554 /* 555 * We must have an FDT, but we cannot panic() yet since the console 556 * is not ready. So for now, just assert(). Boards which need an early 557 * FDT (prior to console ready) will need to make their own 558 * arrangements and do their own checks. 559 */ 560 assert(!fdtdec_prepare_fdt()); 561 return 0; 562 } 563 564 /* 565 * This function is a little odd in that it accesses global data. At some 566 * point if the architecture board.c files merge this will make more sense. 567 * Even now, it is common code. 568 */ 569 int fdtdec_prepare_fdt(void) 570 { 571 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 572 fdt_check_header(gd->fdt_blob)) { 573 printf("No valid FDT found - please append one to U-Boot " 574 "binary, use u-boot-dtb.bin or define " 575 "CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n"); 576 return -1; 577 } 578 return 0; 579 } 580 581 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 582 { 583 const u32 *phandle; 584 int lookup; 585 586 debug("%s: %s\n", __func__, prop_name); 587 phandle = fdt_getprop(blob, node, prop_name, NULL); 588 if (!phandle) 589 return -FDT_ERR_NOTFOUND; 590 591 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 592 return lookup; 593 } 594 595 /** 596 * Look up a property in a node and check that it has a minimum length. 597 * 598 * @param blob FDT blob 599 * @param node node to examine 600 * @param prop_name name of property to find 601 * @param min_len minimum property length in bytes 602 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 603 found, or -FDT_ERR_BADLAYOUT if not enough data 604 * @return pointer to cell, which is only valid if err == 0 605 */ 606 static const void *get_prop_check_min_len(const void *blob, int node, 607 const char *prop_name, int min_len, int *err) 608 { 609 const void *cell; 610 int len; 611 612 debug("%s: %s\n", __func__, prop_name); 613 cell = fdt_getprop(blob, node, prop_name, &len); 614 if (!cell) 615 *err = -FDT_ERR_NOTFOUND; 616 else if (len < min_len) 617 *err = -FDT_ERR_BADLAYOUT; 618 else 619 *err = 0; 620 return cell; 621 } 622 623 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 624 u32 *array, int count) 625 { 626 const u32 *cell; 627 int i, err = 0; 628 629 debug("%s: %s\n", __func__, prop_name); 630 cell = get_prop_check_min_len(blob, node, prop_name, 631 sizeof(u32) * count, &err); 632 if (!err) { 633 for (i = 0; i < count; i++) 634 array[i] = fdt32_to_cpu(cell[i]); 635 } 636 return err; 637 } 638 639 int fdtdec_get_int_array_count(const void *blob, int node, 640 const char *prop_name, u32 *array, int count) 641 { 642 const u32 *cell; 643 int len, elems; 644 int i; 645 646 debug("%s: %s\n", __func__, prop_name); 647 cell = fdt_getprop(blob, node, prop_name, &len); 648 if (!cell) 649 return -FDT_ERR_NOTFOUND; 650 elems = len / sizeof(u32); 651 if (count > elems) 652 count = elems; 653 for (i = 0; i < count; i++) 654 array[i] = fdt32_to_cpu(cell[i]); 655 656 return count; 657 } 658 659 const u32 *fdtdec_locate_array(const void *blob, int node, 660 const char *prop_name, int count) 661 { 662 const u32 *cell; 663 int err; 664 665 cell = get_prop_check_min_len(blob, node, prop_name, 666 sizeof(u32) * count, &err); 667 return err ? NULL : cell; 668 } 669 670 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 671 { 672 const s32 *cell; 673 int len; 674 675 debug("%s: %s\n", __func__, prop_name); 676 cell = fdt_getprop(blob, node, prop_name, &len); 677 return cell != NULL; 678 } 679 680 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 681 const char *list_name, 682 const char *cells_name, 683 int cell_count, int index, 684 struct fdtdec_phandle_args *out_args) 685 { 686 const __be32 *list, *list_end; 687 int rc = 0, size, cur_index = 0; 688 uint32_t count = 0; 689 int node = -1; 690 int phandle; 691 692 /* Retrieve the phandle list property */ 693 list = fdt_getprop(blob, src_node, list_name, &size); 694 if (!list) 695 return -ENOENT; 696 list_end = list + size / sizeof(*list); 697 698 /* Loop over the phandles until all the requested entry is found */ 699 while (list < list_end) { 700 rc = -EINVAL; 701 count = 0; 702 703 /* 704 * If phandle is 0, then it is an empty entry with no 705 * arguments. Skip forward to the next entry. 706 */ 707 phandle = be32_to_cpup(list++); 708 if (phandle) { 709 /* 710 * Find the provider node and parse the #*-cells 711 * property to determine the argument length. 712 * 713 * This is not needed if the cell count is hard-coded 714 * (i.e. cells_name not set, but cell_count is set), 715 * except when we're going to return the found node 716 * below. 717 */ 718 if (cells_name || cur_index == index) { 719 node = fdt_node_offset_by_phandle(blob, 720 phandle); 721 if (!node) { 722 debug("%s: could not find phandle\n", 723 fdt_get_name(blob, src_node, 724 NULL)); 725 goto err; 726 } 727 } 728 729 if (cells_name) { 730 count = fdtdec_get_int(blob, node, cells_name, 731 -1); 732 if (count == -1) { 733 debug("%s: could not get %s for %s\n", 734 fdt_get_name(blob, src_node, 735 NULL), 736 cells_name, 737 fdt_get_name(blob, node, 738 NULL)); 739 goto err; 740 } 741 } else { 742 count = cell_count; 743 } 744 745 /* 746 * Make sure that the arguments actually fit in the 747 * remaining property data length 748 */ 749 if (list + count > list_end) { 750 debug("%s: arguments longer than property\n", 751 fdt_get_name(blob, src_node, NULL)); 752 goto err; 753 } 754 } 755 756 /* 757 * All of the error cases above bail out of the loop, so at 758 * this point, the parsing is successful. If the requested 759 * index matches, then fill the out_args structure and return, 760 * or return -ENOENT for an empty entry. 761 */ 762 rc = -ENOENT; 763 if (cur_index == index) { 764 if (!phandle) 765 goto err; 766 767 if (out_args) { 768 int i; 769 770 if (count > MAX_PHANDLE_ARGS) { 771 debug("%s: too many arguments %d\n", 772 fdt_get_name(blob, src_node, 773 NULL), count); 774 count = MAX_PHANDLE_ARGS; 775 } 776 out_args->node = node; 777 out_args->args_count = count; 778 for (i = 0; i < count; i++) { 779 out_args->args[i] = 780 be32_to_cpup(list++); 781 } 782 } 783 784 /* Found it! return success */ 785 return 0; 786 } 787 788 node = -1; 789 list += count; 790 cur_index++; 791 } 792 793 /* 794 * Result will be one of: 795 * -ENOENT : index is for empty phandle 796 * -EINVAL : parsing error on data 797 * [1..n] : Number of phandle (count mode; when index = -1) 798 */ 799 rc = index < 0 ? cur_index : -ENOENT; 800 err: 801 return rc; 802 } 803 804 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 805 u8 *array, int count) 806 { 807 const u8 *cell; 808 int err; 809 810 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 811 if (!err) 812 memcpy(array, cell, count); 813 return err; 814 } 815 816 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 817 const char *prop_name, int count) 818 { 819 const u8 *cell; 820 int err; 821 822 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 823 if (err) 824 return NULL; 825 return cell; 826 } 827 828 int fdtdec_get_config_int(const void *blob, const char *prop_name, 829 int default_val) 830 { 831 int config_node; 832 833 debug("%s: %s\n", __func__, prop_name); 834 config_node = fdt_path_offset(blob, "/config"); 835 if (config_node < 0) 836 return default_val; 837 return fdtdec_get_int(blob, config_node, prop_name, default_val); 838 } 839 840 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 841 { 842 int config_node; 843 const void *prop; 844 845 debug("%s: %s\n", __func__, prop_name); 846 config_node = fdt_path_offset(blob, "/config"); 847 if (config_node < 0) 848 return 0; 849 prop = fdt_get_property(blob, config_node, prop_name, NULL); 850 851 return prop != NULL; 852 } 853 854 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 855 { 856 const char *nodep; 857 int nodeoffset; 858 int len; 859 860 debug("%s: %s\n", __func__, prop_name); 861 nodeoffset = fdt_path_offset(blob, "/config"); 862 if (nodeoffset < 0) 863 return NULL; 864 865 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 866 if (!nodep) 867 return NULL; 868 869 return (char *)nodep; 870 } 871 872 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 873 fdt_addr_t *basep, fdt_size_t *sizep) 874 { 875 const fdt_addr_t *cell; 876 int len; 877 878 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 879 prop_name); 880 cell = fdt_getprop(blob, node, prop_name, &len); 881 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 882 debug("cell=%p, len=%d\n", cell, len); 883 return -1; 884 } 885 886 *basep = fdt_addr_to_cpu(*cell); 887 *sizep = fdt_size_to_cpu(cell[1]); 888 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 889 (ulong)*sizep); 890 891 return 0; 892 } 893 894 /** 895 * Read a flash entry from the fdt 896 * 897 * @param blob FDT blob 898 * @param node Offset of node to read 899 * @param name Name of node being read 900 * @param entry Place to put offset and size of this node 901 * @return 0 if ok, -ve on error 902 */ 903 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 904 struct fmap_entry *entry) 905 { 906 const char *prop; 907 u32 reg[2]; 908 909 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 910 debug("Node '%s' has bad/missing 'reg' property\n", name); 911 return -FDT_ERR_NOTFOUND; 912 } 913 entry->offset = reg[0]; 914 entry->length = reg[1]; 915 entry->used = fdtdec_get_int(blob, node, "used", entry->length); 916 prop = fdt_getprop(blob, node, "compress", NULL); 917 entry->compress_algo = prop && !strcmp(prop, "lzo") ? 918 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; 919 prop = fdt_getprop(blob, node, "hash", &entry->hash_size); 920 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; 921 entry->hash = (uint8_t *)prop; 922 923 return 0; 924 } 925 926 static u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 927 { 928 u64 number = 0; 929 930 while (cells--) 931 number = (number << 32) | fdt32_to_cpu(*ptr++); 932 933 return number; 934 } 935 936 int fdt_get_resource(const void *fdt, int node, const char *property, 937 unsigned int index, struct fdt_resource *res) 938 { 939 const fdt32_t *ptr, *end; 940 int na, ns, len, parent; 941 unsigned int i = 0; 942 943 parent = fdt_parent_offset(fdt, node); 944 if (parent < 0) 945 return parent; 946 947 na = fdt_address_cells(fdt, parent); 948 ns = fdt_size_cells(fdt, parent); 949 950 ptr = fdt_getprop(fdt, node, property, &len); 951 if (!ptr) 952 return len; 953 954 end = ptr + len / sizeof(*ptr); 955 956 while (ptr + na + ns <= end) { 957 if (i == index) { 958 res->start = res->end = fdtdec_get_number(ptr, na); 959 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 960 return 0; 961 } 962 963 ptr += na + ns; 964 i++; 965 } 966 967 return -FDT_ERR_NOTFOUND; 968 } 969 970 int fdt_get_named_resource(const void *fdt, int node, const char *property, 971 const char *prop_names, const char *name, 972 struct fdt_resource *res) 973 { 974 int index; 975 976 index = fdt_find_string(fdt, node, prop_names, name); 977 if (index < 0) 978 return index; 979 980 return fdt_get_resource(fdt, node, property, index, res); 981 } 982 983 int fdtdec_decode_memory_region(const void *blob, int config_node, 984 const char *mem_type, const char *suffix, 985 fdt_addr_t *basep, fdt_size_t *sizep) 986 { 987 char prop_name[50]; 988 const char *mem; 989 fdt_size_t size, offset_size; 990 fdt_addr_t base, offset; 991 int node; 992 993 if (config_node == -1) { 994 config_node = fdt_path_offset(blob, "/config"); 995 if (config_node < 0) { 996 debug("%s: Cannot find /config node\n", __func__); 997 return -ENOENT; 998 } 999 } 1000 if (!suffix) 1001 suffix = ""; 1002 1003 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 1004 suffix); 1005 mem = fdt_getprop(blob, config_node, prop_name, NULL); 1006 if (!mem) { 1007 debug("%s: No memory type for '%s', using /memory\n", __func__, 1008 prop_name); 1009 mem = "/memory"; 1010 } 1011 1012 node = fdt_path_offset(blob, mem); 1013 if (node < 0) { 1014 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 1015 fdt_strerror(node)); 1016 return -ENOENT; 1017 } 1018 1019 /* 1020 * Not strictly correct - the memory may have multiple banks. We just 1021 * use the first 1022 */ 1023 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 1024 debug("%s: Failed to decode memory region %s\n", __func__, 1025 mem); 1026 return -EINVAL; 1027 } 1028 1029 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 1030 suffix); 1031 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 1032 &offset_size)) { 1033 debug("%s: Failed to decode memory region '%s'\n", __func__, 1034 prop_name); 1035 return -EINVAL; 1036 } 1037 1038 *basep = base + offset; 1039 *sizep = offset_size; 1040 1041 return 0; 1042 } 1043 #endif 1044