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 <asm/sections.h> 13 #include <linux/ctype.h> 14 15 DECLARE_GLOBAL_DATA_PTR; 16 17 /* 18 * Here are the type we know about. One day we might allow drivers to 19 * register. For now we just put them here. The COMPAT macro allows us to 20 * turn this into a sparse list later, and keeps the ID with the name. 21 */ 22 #define COMPAT(id, name) name 23 static const char * const compat_names[COMPAT_COUNT] = { 24 COMPAT(UNKNOWN, "<none>"), 25 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"), 26 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"), 27 COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"), 28 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"), 29 COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"), 30 COMPAT(NVIDIA_TEGRA124_DC, "nvidia,tegra124-dc"), 31 COMPAT(NVIDIA_TEGRA124_SOR, "nvidia,tegra124-sor"), 32 COMPAT(NVIDIA_TEGRA124_PMC, "nvidia,tegra124-pmc"), 33 COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"), 34 COMPAT(NVIDIA_TEGRA210_SDMMC, "nvidia,tegra210-sdhci"), 35 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"), 36 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"), 37 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"), 38 COMPAT(NVIDIA_TEGRA124_PCIE, "nvidia,tegra124-pcie"), 39 COMPAT(NVIDIA_TEGRA30_PCIE, "nvidia,tegra30-pcie"), 40 COMPAT(NVIDIA_TEGRA20_PCIE, "nvidia,tegra20-pcie"), 41 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"), 42 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"), 43 COMPAT(SMSC_LAN9215, "smsc,lan9215"), 44 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), 45 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), 46 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), 47 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), 48 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"), 49 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), 50 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"), 51 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), 52 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"), 53 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"), 54 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"), 55 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), 56 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), 57 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"), 58 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"), 59 COMPAT(GENERIC_SPI_FLASH, "spi-flash"), 60 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), 61 COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"), 62 COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645tt"), 63 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), 64 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"), 65 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), 66 COMPAT(INTEL_MICROCODE, "intel,microcode"), 67 COMPAT(MEMORY_SPD, "memory-spd"), 68 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"), 69 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"), 70 COMPAT(INTEL_GMA, "intel,gma"), 71 COMPAT(AMS_AS3722, "ams,as3722"), 72 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"), 73 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"), 74 COMPAT(INTEL_X86_PINCTRL, "intel,x86-pinctrl"), 75 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"), 76 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"), 77 COMPAT(COMPAT_INTEL_IRQ_ROUTER, "intel,irq-router"), 78 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"), 79 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"), 80 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"), 81 }; 82 83 const char *fdtdec_get_compatible(enum fdt_compat_id id) 84 { 85 /* We allow reading of the 'unknown' ID for testing purposes */ 86 assert(id >= 0 && id < COMPAT_COUNT); 87 return compat_names[id]; 88 } 89 90 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 91 const char *prop_name, fdt_size_t *sizep) 92 { 93 const fdt_addr_t *cell; 94 int len; 95 96 debug("%s: %s: ", __func__, prop_name); 97 cell = fdt_getprop(blob, node, prop_name, &len); 98 if (cell && ((!sizep && len == sizeof(fdt_addr_t)) || 99 len == sizeof(fdt_addr_t) * 2)) { 100 fdt_addr_t addr = fdt_addr_to_cpu(*cell); 101 if (sizep) { 102 const fdt_size_t *size; 103 104 size = (fdt_size_t *)((char *)cell + 105 sizeof(fdt_addr_t)); 106 *sizep = fdt_size_to_cpu(*size); 107 debug("addr=%08lx, size=%llx\n", 108 (ulong)addr, (u64)*sizep); 109 } else { 110 debug("%08lx\n", (ulong)addr); 111 } 112 return addr; 113 } 114 debug("(not found)\n"); 115 return FDT_ADDR_T_NONE; 116 } 117 118 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 119 const char *prop_name) 120 { 121 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 122 } 123 124 #ifdef CONFIG_PCI 125 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 126 const char *prop_name, struct fdt_pci_addr *addr) 127 { 128 const u32 *cell; 129 int len; 130 int ret = -ENOENT; 131 132 debug("%s: %s: ", __func__, prop_name); 133 134 /* 135 * If we follow the pci bus bindings strictly, we should check 136 * the value of the node's parent node's #address-cells and 137 * #size-cells. They need to be 3 and 2 accordingly. However, 138 * for simplicity we skip the check here. 139 */ 140 cell = fdt_getprop(blob, node, prop_name, &len); 141 if (!cell) 142 goto fail; 143 144 if ((len % FDT_PCI_REG_SIZE) == 0) { 145 int num = len / FDT_PCI_REG_SIZE; 146 int i; 147 148 for (i = 0; i < num; i++) { 149 debug("pci address #%d: %08lx %08lx %08lx\n", i, 150 (ulong)fdt_addr_to_cpu(cell[0]), 151 (ulong)fdt_addr_to_cpu(cell[1]), 152 (ulong)fdt_addr_to_cpu(cell[2])); 153 if ((fdt_addr_to_cpu(*cell) & type) == type) { 154 addr->phys_hi = fdt_addr_to_cpu(cell[0]); 155 addr->phys_mid = fdt_addr_to_cpu(cell[1]); 156 addr->phys_lo = fdt_addr_to_cpu(cell[2]); 157 break; 158 } else { 159 cell += (FDT_PCI_ADDR_CELLS + 160 FDT_PCI_SIZE_CELLS); 161 } 162 } 163 164 if (i == num) { 165 ret = -ENXIO; 166 goto fail; 167 } 168 169 return 0; 170 } else { 171 ret = -EINVAL; 172 } 173 174 fail: 175 debug("(not found)\n"); 176 return ret; 177 } 178 179 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 180 { 181 const char *list, *end; 182 int len; 183 184 list = fdt_getprop(blob, node, "compatible", &len); 185 if (!list) 186 return -ENOENT; 187 188 end = list + len; 189 while (list < end) { 190 char *s; 191 192 len = strlen(list); 193 if (len >= strlen("pciVVVV,DDDD")) { 194 s = strstr(list, "pci"); 195 196 /* 197 * check if the string is something like pciVVVV,DDDD.RR 198 * or just pciVVVV,DDDD 199 */ 200 if (s && s[7] == ',' && 201 (s[12] == '.' || s[12] == 0)) { 202 s += 3; 203 *vendor = simple_strtol(s, NULL, 16); 204 205 s += 5; 206 *device = simple_strtol(s, NULL, 16); 207 208 return 0; 209 } 210 } else { 211 list += (len + 1); 212 } 213 } 214 215 return -ENOENT; 216 } 217 218 int fdtdec_get_pci_bdf(const void *blob, int node, 219 struct fdt_pci_addr *addr, pci_dev_t *bdf) 220 { 221 u16 dt_vendor, dt_device, vendor, device; 222 int ret; 223 224 /* get vendor id & device id from the compatible string */ 225 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device); 226 if (ret) 227 return ret; 228 229 /* extract the bdf from fdt_pci_addr */ 230 *bdf = addr->phys_hi & 0xffff00; 231 232 /* read vendor id & device id based on bdf */ 233 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor); 234 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device); 235 236 /* 237 * Note there are two places in the device tree to fully describe 238 * a pci device: one is via compatible string with a format of 239 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in 240 * the device node's reg address property. We read the vendor id 241 * and device id based on bdf and compare the values with the 242 * "VVVV,DDDD". If they are the same, then we are good to use bdf 243 * to read device's bar. But if they are different, we have to rely 244 * on the vendor id and device id extracted from the compatible 245 * string and locate the real bdf by pci_find_device(). This is 246 * because normally we may only know device's device number and 247 * function number when writing device tree. The bus number is 248 * dynamically assigned during the pci enumeration process. 249 */ 250 if ((dt_vendor != vendor) || (dt_device != device)) { 251 *bdf = pci_find_device(dt_vendor, dt_device, 0); 252 if (*bdf == -1) 253 return -ENODEV; 254 } 255 256 return 0; 257 } 258 259 int fdtdec_get_pci_bar32(const void *blob, int node, 260 struct fdt_pci_addr *addr, u32 *bar) 261 { 262 pci_dev_t bdf; 263 int barnum; 264 int ret; 265 266 /* get pci devices's bdf */ 267 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf); 268 if (ret) 269 return ret; 270 271 /* extract the bar number from fdt_pci_addr */ 272 barnum = addr->phys_hi & 0xff; 273 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) 274 return -EINVAL; 275 276 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; 277 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum); 278 279 return 0; 280 } 281 #endif 282 283 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 284 uint64_t default_val) 285 { 286 const uint64_t *cell64; 287 int length; 288 289 cell64 = fdt_getprop(blob, node, prop_name, &length); 290 if (!cell64 || length < sizeof(*cell64)) 291 return default_val; 292 293 return fdt64_to_cpu(*cell64); 294 } 295 296 int fdtdec_get_is_enabled(const void *blob, int node) 297 { 298 const char *cell; 299 300 /* 301 * It should say "okay", so only allow that. Some fdts use "ok" but 302 * this is a bug. Please fix your device tree source file. See here 303 * for discussion: 304 * 305 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 306 */ 307 cell = fdt_getprop(blob, node, "status", NULL); 308 if (cell) 309 return 0 == strcmp(cell, "okay"); 310 return 1; 311 } 312 313 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 314 { 315 enum fdt_compat_id id; 316 317 /* Search our drivers */ 318 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 319 if (0 == fdt_node_check_compatible(blob, node, 320 compat_names[id])) 321 return id; 322 return COMPAT_UNKNOWN; 323 } 324 325 int fdtdec_next_compatible(const void *blob, int node, 326 enum fdt_compat_id id) 327 { 328 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 329 } 330 331 int fdtdec_next_compatible_subnode(const void *blob, int node, 332 enum fdt_compat_id id, int *depthp) 333 { 334 do { 335 node = fdt_next_node(blob, node, depthp); 336 } while (*depthp > 1); 337 338 /* If this is a direct subnode, and compatible, return it */ 339 if (*depthp == 1 && 0 == fdt_node_check_compatible( 340 blob, node, compat_names[id])) 341 return node; 342 343 return -FDT_ERR_NOTFOUND; 344 } 345 346 int fdtdec_next_alias(const void *blob, const char *name, 347 enum fdt_compat_id id, int *upto) 348 { 349 #define MAX_STR_LEN 20 350 char str[MAX_STR_LEN + 20]; 351 int node, err; 352 353 /* snprintf() is not available */ 354 assert(strlen(name) < MAX_STR_LEN); 355 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 356 node = fdt_path_offset(blob, str); 357 if (node < 0) 358 return node; 359 err = fdt_node_check_compatible(blob, node, compat_names[id]); 360 if (err < 0) 361 return err; 362 if (err) 363 return -FDT_ERR_NOTFOUND; 364 (*upto)++; 365 return node; 366 } 367 368 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 369 enum fdt_compat_id id, int *node_list, int maxcount) 370 { 371 memset(node_list, '\0', sizeof(*node_list) * maxcount); 372 373 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 374 } 375 376 /* TODO: Can we tighten this code up a little? */ 377 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 378 enum fdt_compat_id id, int *node_list, int maxcount) 379 { 380 int name_len = strlen(name); 381 int nodes[maxcount]; 382 int num_found = 0; 383 int offset, node; 384 int alias_node; 385 int count; 386 int i, j; 387 388 /* find the alias node if present */ 389 alias_node = fdt_path_offset(blob, "/aliases"); 390 391 /* 392 * start with nothing, and we can assume that the root node can't 393 * match 394 */ 395 memset(nodes, '\0', sizeof(nodes)); 396 397 /* First find all the compatible nodes */ 398 for (node = count = 0; node >= 0 && count < maxcount;) { 399 node = fdtdec_next_compatible(blob, node, id); 400 if (node >= 0) 401 nodes[count++] = node; 402 } 403 if (node >= 0) 404 debug("%s: warning: maxcount exceeded with alias '%s'\n", 405 __func__, name); 406 407 /* Now find all the aliases */ 408 for (offset = fdt_first_property_offset(blob, alias_node); 409 offset > 0; 410 offset = fdt_next_property_offset(blob, offset)) { 411 const struct fdt_property *prop; 412 const char *path; 413 int number; 414 int found; 415 416 node = 0; 417 prop = fdt_get_property_by_offset(blob, offset, NULL); 418 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 419 if (prop->len && 0 == strncmp(path, name, name_len)) 420 node = fdt_path_offset(blob, prop->data); 421 if (node <= 0) 422 continue; 423 424 /* Get the alias number */ 425 number = simple_strtoul(path + name_len, NULL, 10); 426 if (number < 0 || number >= maxcount) { 427 debug("%s: warning: alias '%s' is out of range\n", 428 __func__, path); 429 continue; 430 } 431 432 /* Make sure the node we found is actually in our list! */ 433 found = -1; 434 for (j = 0; j < count; j++) 435 if (nodes[j] == node) { 436 found = j; 437 break; 438 } 439 440 if (found == -1) { 441 debug("%s: warning: alias '%s' points to a node " 442 "'%s' that is missing or is not compatible " 443 " with '%s'\n", __func__, path, 444 fdt_get_name(blob, node, NULL), 445 compat_names[id]); 446 continue; 447 } 448 449 /* 450 * Add this node to our list in the right place, and mark 451 * it as done. 452 */ 453 if (fdtdec_get_is_enabled(blob, node)) { 454 if (node_list[number]) { 455 debug("%s: warning: alias '%s' requires that " 456 "a node be placed in the list in a " 457 "position which is already filled by " 458 "node '%s'\n", __func__, path, 459 fdt_get_name(blob, node, NULL)); 460 continue; 461 } 462 node_list[number] = node; 463 if (number >= num_found) 464 num_found = number + 1; 465 } 466 nodes[found] = 0; 467 } 468 469 /* Add any nodes not mentioned by an alias */ 470 for (i = j = 0; i < maxcount; i++) { 471 if (!node_list[i]) { 472 for (; j < maxcount; j++) 473 if (nodes[j] && 474 fdtdec_get_is_enabled(blob, nodes[j])) 475 break; 476 477 /* Have we run out of nodes to add? */ 478 if (j == maxcount) 479 break; 480 481 assert(!node_list[i]); 482 node_list[i] = nodes[j++]; 483 if (i >= num_found) 484 num_found = i + 1; 485 } 486 } 487 488 return num_found; 489 } 490 491 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 492 int *seqp) 493 { 494 int base_len = strlen(base); 495 const char *find_name; 496 int find_namelen; 497 int prop_offset; 498 int aliases; 499 500 find_name = fdt_get_name(blob, offset, &find_namelen); 501 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 502 503 aliases = fdt_path_offset(blob, "/aliases"); 504 for (prop_offset = fdt_first_property_offset(blob, aliases); 505 prop_offset > 0; 506 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 507 const char *prop; 508 const char *name; 509 const char *slash; 510 int len, val; 511 512 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 513 debug(" - %s, %s\n", name, prop); 514 if (len < find_namelen || *prop != '/' || prop[len - 1] || 515 strncmp(name, base, base_len)) 516 continue; 517 518 slash = strrchr(prop, '/'); 519 if (strcmp(slash + 1, find_name)) 520 continue; 521 val = trailing_strtol(name); 522 if (val != -1) { 523 *seqp = val; 524 debug("Found seq %d\n", *seqp); 525 return 0; 526 } 527 } 528 529 debug("Not found\n"); 530 return -ENOENT; 531 } 532 533 int fdtdec_get_chosen_node(const void *blob, const char *name) 534 { 535 const char *prop; 536 int chosen_node; 537 int len; 538 539 if (!blob) 540 return -FDT_ERR_NOTFOUND; 541 chosen_node = fdt_path_offset(blob, "/chosen"); 542 prop = fdt_getprop(blob, chosen_node, name, &len); 543 if (!prop) 544 return -FDT_ERR_NOTFOUND; 545 return fdt_path_offset(blob, prop); 546 } 547 548 int fdtdec_check_fdt(void) 549 { 550 /* 551 * We must have an FDT, but we cannot panic() yet since the console 552 * is not ready. So for now, just assert(). Boards which need an early 553 * FDT (prior to console ready) will need to make their own 554 * arrangements and do their own checks. 555 */ 556 assert(!fdtdec_prepare_fdt()); 557 return 0; 558 } 559 560 /* 561 * This function is a little odd in that it accesses global data. At some 562 * point if the architecture board.c files merge this will make more sense. 563 * Even now, it is common code. 564 */ 565 int fdtdec_prepare_fdt(void) 566 { 567 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 568 fdt_check_header(gd->fdt_blob)) { 569 #ifdef CONFIG_SPL_BUILD 570 puts("Missing DTB\n"); 571 #else 572 puts("No valid device tree binary found - please append one to U-Boot binary, use u-boot-dtb.bin or define CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n"); 573 # ifdef DEBUG 574 if (gd->fdt_blob) { 575 printf("fdt_blob=%p\n", gd->fdt_blob); 576 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4, 577 32, 0); 578 } 579 # endif 580 #endif 581 return -1; 582 } 583 return 0; 584 } 585 586 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 587 { 588 const u32 *phandle; 589 int lookup; 590 591 debug("%s: %s\n", __func__, prop_name); 592 phandle = fdt_getprop(blob, node, prop_name, NULL); 593 if (!phandle) 594 return -FDT_ERR_NOTFOUND; 595 596 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 597 return lookup; 598 } 599 600 /** 601 * Look up a property in a node and check that it has a minimum length. 602 * 603 * @param blob FDT blob 604 * @param node node to examine 605 * @param prop_name name of property to find 606 * @param min_len minimum property length in bytes 607 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 608 found, or -FDT_ERR_BADLAYOUT if not enough data 609 * @return pointer to cell, which is only valid if err == 0 610 */ 611 static const void *get_prop_check_min_len(const void *blob, int node, 612 const char *prop_name, int min_len, int *err) 613 { 614 const void *cell; 615 int len; 616 617 debug("%s: %s\n", __func__, prop_name); 618 cell = fdt_getprop(blob, node, prop_name, &len); 619 if (!cell) 620 *err = -FDT_ERR_NOTFOUND; 621 else if (len < min_len) 622 *err = -FDT_ERR_BADLAYOUT; 623 else 624 *err = 0; 625 return cell; 626 } 627 628 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 629 u32 *array, int count) 630 { 631 const u32 *cell; 632 int i, err = 0; 633 634 debug("%s: %s\n", __func__, prop_name); 635 cell = get_prop_check_min_len(blob, node, prop_name, 636 sizeof(u32) * count, &err); 637 if (!err) { 638 for (i = 0; i < count; i++) 639 array[i] = fdt32_to_cpu(cell[i]); 640 } 641 return err; 642 } 643 644 int fdtdec_get_int_array_count(const void *blob, int node, 645 const char *prop_name, u32 *array, int count) 646 { 647 const u32 *cell; 648 int len, elems; 649 int i; 650 651 debug("%s: %s\n", __func__, prop_name); 652 cell = fdt_getprop(blob, node, prop_name, &len); 653 if (!cell) 654 return -FDT_ERR_NOTFOUND; 655 elems = len / sizeof(u32); 656 if (count > elems) 657 count = elems; 658 for (i = 0; i < count; i++) 659 array[i] = fdt32_to_cpu(cell[i]); 660 661 return count; 662 } 663 664 const u32 *fdtdec_locate_array(const void *blob, int node, 665 const char *prop_name, int count) 666 { 667 const u32 *cell; 668 int err; 669 670 cell = get_prop_check_min_len(blob, node, prop_name, 671 sizeof(u32) * count, &err); 672 return err ? NULL : cell; 673 } 674 675 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 676 { 677 const s32 *cell; 678 int len; 679 680 debug("%s: %s\n", __func__, prop_name); 681 cell = fdt_getprop(blob, node, prop_name, &len); 682 return cell != NULL; 683 } 684 685 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 686 const char *list_name, 687 const char *cells_name, 688 int cell_count, int index, 689 struct fdtdec_phandle_args *out_args) 690 { 691 const __be32 *list, *list_end; 692 int rc = 0, size, cur_index = 0; 693 uint32_t count = 0; 694 int node = -1; 695 int phandle; 696 697 /* Retrieve the phandle list property */ 698 list = fdt_getprop(blob, src_node, list_name, &size); 699 if (!list) 700 return -ENOENT; 701 list_end = list + size / sizeof(*list); 702 703 /* Loop over the phandles until all the requested entry is found */ 704 while (list < list_end) { 705 rc = -EINVAL; 706 count = 0; 707 708 /* 709 * If phandle is 0, then it is an empty entry with no 710 * arguments. Skip forward to the next entry. 711 */ 712 phandle = be32_to_cpup(list++); 713 if (phandle) { 714 /* 715 * Find the provider node and parse the #*-cells 716 * property to determine the argument length. 717 * 718 * This is not needed if the cell count is hard-coded 719 * (i.e. cells_name not set, but cell_count is set), 720 * except when we're going to return the found node 721 * below. 722 */ 723 if (cells_name || cur_index == index) { 724 node = fdt_node_offset_by_phandle(blob, 725 phandle); 726 if (!node) { 727 debug("%s: could not find phandle\n", 728 fdt_get_name(blob, src_node, 729 NULL)); 730 goto err; 731 } 732 } 733 734 if (cells_name) { 735 count = fdtdec_get_int(blob, node, cells_name, 736 -1); 737 if (count == -1) { 738 debug("%s: could not get %s for %s\n", 739 fdt_get_name(blob, src_node, 740 NULL), 741 cells_name, 742 fdt_get_name(blob, node, 743 NULL)); 744 goto err; 745 } 746 } else { 747 count = cell_count; 748 } 749 750 /* 751 * Make sure that the arguments actually fit in the 752 * remaining property data length 753 */ 754 if (list + count > list_end) { 755 debug("%s: arguments longer than property\n", 756 fdt_get_name(blob, src_node, NULL)); 757 goto err; 758 } 759 } 760 761 /* 762 * All of the error cases above bail out of the loop, so at 763 * this point, the parsing is successful. If the requested 764 * index matches, then fill the out_args structure and return, 765 * or return -ENOENT for an empty entry. 766 */ 767 rc = -ENOENT; 768 if (cur_index == index) { 769 if (!phandle) 770 goto err; 771 772 if (out_args) { 773 int i; 774 775 if (count > MAX_PHANDLE_ARGS) { 776 debug("%s: too many arguments %d\n", 777 fdt_get_name(blob, src_node, 778 NULL), count); 779 count = MAX_PHANDLE_ARGS; 780 } 781 out_args->node = node; 782 out_args->args_count = count; 783 for (i = 0; i < count; i++) { 784 out_args->args[i] = 785 be32_to_cpup(list++); 786 } 787 } 788 789 /* Found it! return success */ 790 return 0; 791 } 792 793 node = -1; 794 list += count; 795 cur_index++; 796 } 797 798 /* 799 * Result will be one of: 800 * -ENOENT : index is for empty phandle 801 * -EINVAL : parsing error on data 802 * [1..n] : Number of phandle (count mode; when index = -1) 803 */ 804 rc = index < 0 ? cur_index : -ENOENT; 805 err: 806 return rc; 807 } 808 809 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 810 u8 *array, int count) 811 { 812 const u8 *cell; 813 int err; 814 815 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 816 if (!err) 817 memcpy(array, cell, count); 818 return err; 819 } 820 821 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 822 const char *prop_name, int count) 823 { 824 const u8 *cell; 825 int err; 826 827 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 828 if (err) 829 return NULL; 830 return cell; 831 } 832 833 int fdtdec_get_config_int(const void *blob, const char *prop_name, 834 int default_val) 835 { 836 int config_node; 837 838 debug("%s: %s\n", __func__, prop_name); 839 config_node = fdt_path_offset(blob, "/config"); 840 if (config_node < 0) 841 return default_val; 842 return fdtdec_get_int(blob, config_node, prop_name, default_val); 843 } 844 845 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 846 { 847 int config_node; 848 const void *prop; 849 850 debug("%s: %s\n", __func__, prop_name); 851 config_node = fdt_path_offset(blob, "/config"); 852 if (config_node < 0) 853 return 0; 854 prop = fdt_get_property(blob, config_node, prop_name, NULL); 855 856 return prop != NULL; 857 } 858 859 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 860 { 861 const char *nodep; 862 int nodeoffset; 863 int len; 864 865 debug("%s: %s\n", __func__, prop_name); 866 nodeoffset = fdt_path_offset(blob, "/config"); 867 if (nodeoffset < 0) 868 return NULL; 869 870 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 871 if (!nodep) 872 return NULL; 873 874 return (char *)nodep; 875 } 876 877 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 878 fdt_addr_t *basep, fdt_size_t *sizep) 879 { 880 const fdt_addr_t *cell; 881 int len; 882 883 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 884 prop_name); 885 cell = fdt_getprop(blob, node, prop_name, &len); 886 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 887 debug("cell=%p, len=%d\n", cell, len); 888 return -1; 889 } 890 891 *basep = fdt_addr_to_cpu(*cell); 892 *sizep = fdt_size_to_cpu(cell[1]); 893 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 894 (ulong)*sizep); 895 896 return 0; 897 } 898 899 /** 900 * Read a flash entry from the fdt 901 * 902 * @param blob FDT blob 903 * @param node Offset of node to read 904 * @param name Name of node being read 905 * @param entry Place to put offset and size of this node 906 * @return 0 if ok, -ve on error 907 */ 908 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 909 struct fmap_entry *entry) 910 { 911 const char *prop; 912 u32 reg[2]; 913 914 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 915 debug("Node '%s' has bad/missing 'reg' property\n", name); 916 return -FDT_ERR_NOTFOUND; 917 } 918 entry->offset = reg[0]; 919 entry->length = reg[1]; 920 entry->used = fdtdec_get_int(blob, node, "used", entry->length); 921 prop = fdt_getprop(blob, node, "compress", NULL); 922 entry->compress_algo = prop && !strcmp(prop, "lzo") ? 923 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; 924 prop = fdt_getprop(blob, node, "hash", &entry->hash_size); 925 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; 926 entry->hash = (uint8_t *)prop; 927 928 return 0; 929 } 930 931 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 932 { 933 u64 number = 0; 934 935 while (cells--) 936 number = (number << 32) | fdt32_to_cpu(*ptr++); 937 938 return number; 939 } 940 941 int fdt_get_resource(const void *fdt, int node, const char *property, 942 unsigned int index, struct fdt_resource *res) 943 { 944 const fdt32_t *ptr, *end; 945 int na, ns, len, parent; 946 unsigned int i = 0; 947 948 parent = fdt_parent_offset(fdt, node); 949 if (parent < 0) 950 return parent; 951 952 na = fdt_address_cells(fdt, parent); 953 ns = fdt_size_cells(fdt, parent); 954 955 ptr = fdt_getprop(fdt, node, property, &len); 956 if (!ptr) 957 return len; 958 959 end = ptr + len / sizeof(*ptr); 960 961 while (ptr + na + ns <= end) { 962 if (i == index) { 963 res->start = res->end = fdtdec_get_number(ptr, na); 964 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 965 return 0; 966 } 967 968 ptr += na + ns; 969 i++; 970 } 971 972 return -FDT_ERR_NOTFOUND; 973 } 974 975 int fdt_get_named_resource(const void *fdt, int node, const char *property, 976 const char *prop_names, const char *name, 977 struct fdt_resource *res) 978 { 979 int index; 980 981 index = fdt_find_string(fdt, node, prop_names, name); 982 if (index < 0) 983 return index; 984 985 return fdt_get_resource(fdt, node, property, index, res); 986 } 987 988 int fdtdec_decode_memory_region(const void *blob, int config_node, 989 const char *mem_type, const char *suffix, 990 fdt_addr_t *basep, fdt_size_t *sizep) 991 { 992 char prop_name[50]; 993 const char *mem; 994 fdt_size_t size, offset_size; 995 fdt_addr_t base, offset; 996 int node; 997 998 if (config_node == -1) { 999 config_node = fdt_path_offset(blob, "/config"); 1000 if (config_node < 0) { 1001 debug("%s: Cannot find /config node\n", __func__); 1002 return -ENOENT; 1003 } 1004 } 1005 if (!suffix) 1006 suffix = ""; 1007 1008 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 1009 suffix); 1010 mem = fdt_getprop(blob, config_node, prop_name, NULL); 1011 if (!mem) { 1012 debug("%s: No memory type for '%s', using /memory\n", __func__, 1013 prop_name); 1014 mem = "/memory"; 1015 } 1016 1017 node = fdt_path_offset(blob, mem); 1018 if (node < 0) { 1019 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 1020 fdt_strerror(node)); 1021 return -ENOENT; 1022 } 1023 1024 /* 1025 * Not strictly correct - the memory may have multiple banks. We just 1026 * use the first 1027 */ 1028 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 1029 debug("%s: Failed to decode memory region %s\n", __func__, 1030 mem); 1031 return -EINVAL; 1032 } 1033 1034 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 1035 suffix); 1036 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 1037 &offset_size)) { 1038 debug("%s: Failed to decode memory region '%s'\n", __func__, 1039 prop_name); 1040 return -EINVAL; 1041 } 1042 1043 *basep = base + offset; 1044 *sizep = offset_size; 1045 1046 return 0; 1047 } 1048 1049 static int decode_timing_property(const void *blob, int node, const char *name, 1050 struct timing_entry *result) 1051 { 1052 int length, ret = 0; 1053 const u32 *prop; 1054 1055 prop = fdt_getprop(blob, node, name, &length); 1056 if (!prop) { 1057 debug("%s: could not find property %s\n", 1058 fdt_get_name(blob, node, NULL), name); 1059 return length; 1060 } 1061 1062 if (length == sizeof(u32)) { 1063 result->typ = fdtdec_get_int(blob, node, name, 0); 1064 result->min = result->typ; 1065 result->max = result->typ; 1066 } else { 1067 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3); 1068 } 1069 1070 return ret; 1071 } 1072 1073 int fdtdec_decode_display_timing(const void *blob, int parent, int index, 1074 struct display_timing *dt) 1075 { 1076 int i, node, timings_node; 1077 u32 val = 0; 1078 int ret = 0; 1079 1080 timings_node = fdt_subnode_offset(blob, parent, "display-timings"); 1081 if (timings_node < 0) 1082 return timings_node; 1083 1084 for (i = 0, node = fdt_first_subnode(blob, timings_node); 1085 node > 0 && i != index; 1086 node = fdt_next_subnode(blob, node)) 1087 i++; 1088 1089 if (node < 0) 1090 return node; 1091 1092 memset(dt, 0, sizeof(*dt)); 1093 1094 ret |= decode_timing_property(blob, node, "hback-porch", 1095 &dt->hback_porch); 1096 ret |= decode_timing_property(blob, node, "hfront-porch", 1097 &dt->hfront_porch); 1098 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive); 1099 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len); 1100 ret |= decode_timing_property(blob, node, "vback-porch", 1101 &dt->vback_porch); 1102 ret |= decode_timing_property(blob, node, "vfront-porch", 1103 &dt->vfront_porch); 1104 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive); 1105 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len); 1106 ret |= decode_timing_property(blob, node, "clock-frequency", 1107 &dt->pixelclock); 1108 1109 dt->flags = 0; 1110 val = fdtdec_get_int(blob, node, "vsync-active", -1); 1111 if (val != -1) { 1112 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : 1113 DISPLAY_FLAGS_VSYNC_LOW; 1114 } 1115 val = fdtdec_get_int(blob, node, "hsync-active", -1); 1116 if (val != -1) { 1117 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : 1118 DISPLAY_FLAGS_HSYNC_LOW; 1119 } 1120 val = fdtdec_get_int(blob, node, "de-active", -1); 1121 if (val != -1) { 1122 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : 1123 DISPLAY_FLAGS_DE_LOW; 1124 } 1125 val = fdtdec_get_int(blob, node, "pixelclk-active", -1); 1126 if (val != -1) { 1127 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : 1128 DISPLAY_FLAGS_PIXDATA_NEGEDGE; 1129 } 1130 1131 if (fdtdec_get_bool(blob, node, "interlaced")) 1132 dt->flags |= DISPLAY_FLAGS_INTERLACED; 1133 if (fdtdec_get_bool(blob, node, "doublescan")) 1134 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; 1135 if (fdtdec_get_bool(blob, node, "doubleclk")) 1136 dt->flags |= DISPLAY_FLAGS_DOUBLECLK; 1137 1138 return 0; 1139 } 1140 1141 int fdtdec_setup(void) 1142 { 1143 #if CONFIG_IS_ENABLED(OF_CONTROL) 1144 # ifdef CONFIG_OF_EMBED 1145 /* Get a pointer to the FDT */ 1146 gd->fdt_blob = __dtb_dt_begin; 1147 # elif defined CONFIG_OF_SEPARATE 1148 # ifdef CONFIG_SPL_BUILD 1149 /* FDT is at end of BSS */ 1150 gd->fdt_blob = (ulong *)&__bss_end; 1151 # else 1152 /* FDT is at end of image */ 1153 gd->fdt_blob = (ulong *)&_end; 1154 # endif 1155 # elif defined(CONFIG_OF_HOSTFILE) 1156 if (sandbox_read_fdt_from_file()) { 1157 puts("Failed to read control FDT\n"); 1158 return -1; 1159 } 1160 # endif 1161 # ifndef CONFIG_SPL_BUILD 1162 /* Allow the early environment to override the fdt address */ 1163 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, 1164 (uintptr_t)gd->fdt_blob); 1165 # endif 1166 #endif 1167 return fdtdec_prepare_fdt(); 1168 } 1169 1170 #endif /* !USE_HOSTCC */ 1171