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 } 211 list += (len + 1); 212 } 213 214 return -ENOENT; 215 } 216 217 int fdtdec_get_pci_bdf(const void *blob, int node, 218 struct fdt_pci_addr *addr, pci_dev_t *bdf) 219 { 220 u16 dt_vendor, dt_device, vendor, device; 221 int ret; 222 223 /* get vendor id & device id from the compatible string */ 224 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device); 225 if (ret) 226 return ret; 227 228 /* extract the bdf from fdt_pci_addr */ 229 *bdf = addr->phys_hi & 0xffff00; 230 231 /* read vendor id & device id based on bdf */ 232 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor); 233 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device); 234 235 /* 236 * Note there are two places in the device tree to fully describe 237 * a pci device: one is via compatible string with a format of 238 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in 239 * the device node's reg address property. We read the vendor id 240 * and device id based on bdf and compare the values with the 241 * "VVVV,DDDD". If they are the same, then we are good to use bdf 242 * to read device's bar. But if they are different, we have to rely 243 * on the vendor id and device id extracted from the compatible 244 * string and locate the real bdf by pci_find_device(). This is 245 * because normally we may only know device's device number and 246 * function number when writing device tree. The bus number is 247 * dynamically assigned during the pci enumeration process. 248 */ 249 if ((dt_vendor != vendor) || (dt_device != device)) { 250 *bdf = pci_find_device(dt_vendor, dt_device, 0); 251 if (*bdf == -1) 252 return -ENODEV; 253 } 254 255 return 0; 256 } 257 258 int fdtdec_get_pci_bar32(const void *blob, int node, 259 struct fdt_pci_addr *addr, u32 *bar) 260 { 261 pci_dev_t bdf; 262 int barnum; 263 int ret; 264 265 /* get pci devices's bdf */ 266 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf); 267 if (ret) 268 return ret; 269 270 /* extract the bar number from fdt_pci_addr */ 271 barnum = addr->phys_hi & 0xff; 272 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) 273 return -EINVAL; 274 275 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; 276 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum); 277 278 return 0; 279 } 280 #endif 281 282 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 283 uint64_t default_val) 284 { 285 const uint64_t *cell64; 286 int length; 287 288 cell64 = fdt_getprop(blob, node, prop_name, &length); 289 if (!cell64 || length < sizeof(*cell64)) 290 return default_val; 291 292 return fdt64_to_cpu(*cell64); 293 } 294 295 int fdtdec_get_is_enabled(const void *blob, int node) 296 { 297 const char *cell; 298 299 /* 300 * It should say "okay", so only allow that. Some fdts use "ok" but 301 * this is a bug. Please fix your device tree source file. See here 302 * for discussion: 303 * 304 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 305 */ 306 cell = fdt_getprop(blob, node, "status", NULL); 307 if (cell) 308 return 0 == strcmp(cell, "okay"); 309 return 1; 310 } 311 312 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 313 { 314 enum fdt_compat_id id; 315 316 /* Search our drivers */ 317 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 318 if (0 == fdt_node_check_compatible(blob, node, 319 compat_names[id])) 320 return id; 321 return COMPAT_UNKNOWN; 322 } 323 324 int fdtdec_next_compatible(const void *blob, int node, 325 enum fdt_compat_id id) 326 { 327 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 328 } 329 330 int fdtdec_next_compatible_subnode(const void *blob, int node, 331 enum fdt_compat_id id, int *depthp) 332 { 333 do { 334 node = fdt_next_node(blob, node, depthp); 335 } while (*depthp > 1); 336 337 /* If this is a direct subnode, and compatible, return it */ 338 if (*depthp == 1 && 0 == fdt_node_check_compatible( 339 blob, node, compat_names[id])) 340 return node; 341 342 return -FDT_ERR_NOTFOUND; 343 } 344 345 int fdtdec_next_alias(const void *blob, const char *name, 346 enum fdt_compat_id id, int *upto) 347 { 348 #define MAX_STR_LEN 20 349 char str[MAX_STR_LEN + 20]; 350 int node, err; 351 352 /* snprintf() is not available */ 353 assert(strlen(name) < MAX_STR_LEN); 354 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 355 node = fdt_path_offset(blob, str); 356 if (node < 0) 357 return node; 358 err = fdt_node_check_compatible(blob, node, compat_names[id]); 359 if (err < 0) 360 return err; 361 if (err) 362 return -FDT_ERR_NOTFOUND; 363 (*upto)++; 364 return node; 365 } 366 367 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 368 enum fdt_compat_id id, int *node_list, int maxcount) 369 { 370 memset(node_list, '\0', sizeof(*node_list) * maxcount); 371 372 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 373 } 374 375 /* TODO: Can we tighten this code up a little? */ 376 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 377 enum fdt_compat_id id, int *node_list, int maxcount) 378 { 379 int name_len = strlen(name); 380 int nodes[maxcount]; 381 int num_found = 0; 382 int offset, node; 383 int alias_node; 384 int count; 385 int i, j; 386 387 /* find the alias node if present */ 388 alias_node = fdt_path_offset(blob, "/aliases"); 389 390 /* 391 * start with nothing, and we can assume that the root node can't 392 * match 393 */ 394 memset(nodes, '\0', sizeof(nodes)); 395 396 /* First find all the compatible nodes */ 397 for (node = count = 0; node >= 0 && count < maxcount;) { 398 node = fdtdec_next_compatible(blob, node, id); 399 if (node >= 0) 400 nodes[count++] = node; 401 } 402 if (node >= 0) 403 debug("%s: warning: maxcount exceeded with alias '%s'\n", 404 __func__, name); 405 406 /* Now find all the aliases */ 407 for (offset = fdt_first_property_offset(blob, alias_node); 408 offset > 0; 409 offset = fdt_next_property_offset(blob, offset)) { 410 const struct fdt_property *prop; 411 const char *path; 412 int number; 413 int found; 414 415 node = 0; 416 prop = fdt_get_property_by_offset(blob, offset, NULL); 417 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 418 if (prop->len && 0 == strncmp(path, name, name_len)) 419 node = fdt_path_offset(blob, prop->data); 420 if (node <= 0) 421 continue; 422 423 /* Get the alias number */ 424 number = simple_strtoul(path + name_len, NULL, 10); 425 if (number < 0 || number >= maxcount) { 426 debug("%s: warning: alias '%s' is out of range\n", 427 __func__, path); 428 continue; 429 } 430 431 /* Make sure the node we found is actually in our list! */ 432 found = -1; 433 for (j = 0; j < count; j++) 434 if (nodes[j] == node) { 435 found = j; 436 break; 437 } 438 439 if (found == -1) { 440 debug("%s: warning: alias '%s' points to a node " 441 "'%s' that is missing or is not compatible " 442 " with '%s'\n", __func__, path, 443 fdt_get_name(blob, node, NULL), 444 compat_names[id]); 445 continue; 446 } 447 448 /* 449 * Add this node to our list in the right place, and mark 450 * it as done. 451 */ 452 if (fdtdec_get_is_enabled(blob, node)) { 453 if (node_list[number]) { 454 debug("%s: warning: alias '%s' requires that " 455 "a node be placed in the list in a " 456 "position which is already filled by " 457 "node '%s'\n", __func__, path, 458 fdt_get_name(blob, node, NULL)); 459 continue; 460 } 461 node_list[number] = node; 462 if (number >= num_found) 463 num_found = number + 1; 464 } 465 nodes[found] = 0; 466 } 467 468 /* Add any nodes not mentioned by an alias */ 469 for (i = j = 0; i < maxcount; i++) { 470 if (!node_list[i]) { 471 for (; j < maxcount; j++) 472 if (nodes[j] && 473 fdtdec_get_is_enabled(blob, nodes[j])) 474 break; 475 476 /* Have we run out of nodes to add? */ 477 if (j == maxcount) 478 break; 479 480 assert(!node_list[i]); 481 node_list[i] = nodes[j++]; 482 if (i >= num_found) 483 num_found = i + 1; 484 } 485 } 486 487 return num_found; 488 } 489 490 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 491 int *seqp) 492 { 493 int base_len = strlen(base); 494 const char *find_name; 495 int find_namelen; 496 int prop_offset; 497 int aliases; 498 499 find_name = fdt_get_name(blob, offset, &find_namelen); 500 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 501 502 aliases = fdt_path_offset(blob, "/aliases"); 503 for (prop_offset = fdt_first_property_offset(blob, aliases); 504 prop_offset > 0; 505 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 506 const char *prop; 507 const char *name; 508 const char *slash; 509 int len, val; 510 511 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 512 debug(" - %s, %s\n", name, prop); 513 if (len < find_namelen || *prop != '/' || prop[len - 1] || 514 strncmp(name, base, base_len)) 515 continue; 516 517 slash = strrchr(prop, '/'); 518 if (strcmp(slash + 1, find_name)) 519 continue; 520 val = trailing_strtol(name); 521 if (val != -1) { 522 *seqp = val; 523 debug("Found seq %d\n", *seqp); 524 return 0; 525 } 526 } 527 528 debug("Not found\n"); 529 return -ENOENT; 530 } 531 532 int fdtdec_get_chosen_node(const void *blob, const char *name) 533 { 534 const char *prop; 535 int chosen_node; 536 int len; 537 538 if (!blob) 539 return -FDT_ERR_NOTFOUND; 540 chosen_node = fdt_path_offset(blob, "/chosen"); 541 prop = fdt_getprop(blob, chosen_node, name, &len); 542 if (!prop) 543 return -FDT_ERR_NOTFOUND; 544 return fdt_path_offset(blob, prop); 545 } 546 547 int fdtdec_check_fdt(void) 548 { 549 /* 550 * We must have an FDT, but we cannot panic() yet since the console 551 * is not ready. So for now, just assert(). Boards which need an early 552 * FDT (prior to console ready) will need to make their own 553 * arrangements and do their own checks. 554 */ 555 assert(!fdtdec_prepare_fdt()); 556 return 0; 557 } 558 559 /* 560 * This function is a little odd in that it accesses global data. At some 561 * point if the architecture board.c files merge this will make more sense. 562 * Even now, it is common code. 563 */ 564 int fdtdec_prepare_fdt(void) 565 { 566 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 567 fdt_check_header(gd->fdt_blob)) { 568 #ifdef CONFIG_SPL_BUILD 569 puts("Missing DTB\n"); 570 #else 571 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"); 572 # ifdef DEBUG 573 if (gd->fdt_blob) { 574 printf("fdt_blob=%p\n", gd->fdt_blob); 575 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4, 576 32, 0); 577 } 578 # endif 579 #endif 580 return -1; 581 } 582 return 0; 583 } 584 585 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 586 { 587 const u32 *phandle; 588 int lookup; 589 590 debug("%s: %s\n", __func__, prop_name); 591 phandle = fdt_getprop(blob, node, prop_name, NULL); 592 if (!phandle) 593 return -FDT_ERR_NOTFOUND; 594 595 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 596 return lookup; 597 } 598 599 /** 600 * Look up a property in a node and check that it has a minimum length. 601 * 602 * @param blob FDT blob 603 * @param node node to examine 604 * @param prop_name name of property to find 605 * @param min_len minimum property length in bytes 606 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 607 found, or -FDT_ERR_BADLAYOUT if not enough data 608 * @return pointer to cell, which is only valid if err == 0 609 */ 610 static const void *get_prop_check_min_len(const void *blob, int node, 611 const char *prop_name, int min_len, int *err) 612 { 613 const void *cell; 614 int len; 615 616 debug("%s: %s\n", __func__, prop_name); 617 cell = fdt_getprop(blob, node, prop_name, &len); 618 if (!cell) 619 *err = -FDT_ERR_NOTFOUND; 620 else if (len < min_len) 621 *err = -FDT_ERR_BADLAYOUT; 622 else 623 *err = 0; 624 return cell; 625 } 626 627 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 628 u32 *array, int count) 629 { 630 const u32 *cell; 631 int i, err = 0; 632 633 debug("%s: %s\n", __func__, prop_name); 634 cell = get_prop_check_min_len(blob, node, prop_name, 635 sizeof(u32) * count, &err); 636 if (!err) { 637 for (i = 0; i < count; i++) 638 array[i] = fdt32_to_cpu(cell[i]); 639 } 640 return err; 641 } 642 643 int fdtdec_get_int_array_count(const void *blob, int node, 644 const char *prop_name, u32 *array, int count) 645 { 646 const u32 *cell; 647 int len, elems; 648 int i; 649 650 debug("%s: %s\n", __func__, prop_name); 651 cell = fdt_getprop(blob, node, prop_name, &len); 652 if (!cell) 653 return -FDT_ERR_NOTFOUND; 654 elems = len / sizeof(u32); 655 if (count > elems) 656 count = elems; 657 for (i = 0; i < count; i++) 658 array[i] = fdt32_to_cpu(cell[i]); 659 660 return count; 661 } 662 663 const u32 *fdtdec_locate_array(const void *blob, int node, 664 const char *prop_name, int count) 665 { 666 const u32 *cell; 667 int err; 668 669 cell = get_prop_check_min_len(blob, node, prop_name, 670 sizeof(u32) * count, &err); 671 return err ? NULL : cell; 672 } 673 674 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 675 { 676 const s32 *cell; 677 int len; 678 679 debug("%s: %s\n", __func__, prop_name); 680 cell = fdt_getprop(blob, node, prop_name, &len); 681 return cell != NULL; 682 } 683 684 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 685 const char *list_name, 686 const char *cells_name, 687 int cell_count, int index, 688 struct fdtdec_phandle_args *out_args) 689 { 690 const __be32 *list, *list_end; 691 int rc = 0, size, cur_index = 0; 692 uint32_t count = 0; 693 int node = -1; 694 int phandle; 695 696 /* Retrieve the phandle list property */ 697 list = fdt_getprop(blob, src_node, list_name, &size); 698 if (!list) 699 return -ENOENT; 700 list_end = list + size / sizeof(*list); 701 702 /* Loop over the phandles until all the requested entry is found */ 703 while (list < list_end) { 704 rc = -EINVAL; 705 count = 0; 706 707 /* 708 * If phandle is 0, then it is an empty entry with no 709 * arguments. Skip forward to the next entry. 710 */ 711 phandle = be32_to_cpup(list++); 712 if (phandle) { 713 /* 714 * Find the provider node and parse the #*-cells 715 * property to determine the argument length. 716 * 717 * This is not needed if the cell count is hard-coded 718 * (i.e. cells_name not set, but cell_count is set), 719 * except when we're going to return the found node 720 * below. 721 */ 722 if (cells_name || cur_index == index) { 723 node = fdt_node_offset_by_phandle(blob, 724 phandle); 725 if (!node) { 726 debug("%s: could not find phandle\n", 727 fdt_get_name(blob, src_node, 728 NULL)); 729 goto err; 730 } 731 } 732 733 if (cells_name) { 734 count = fdtdec_get_int(blob, node, cells_name, 735 -1); 736 if (count == -1) { 737 debug("%s: could not get %s for %s\n", 738 fdt_get_name(blob, src_node, 739 NULL), 740 cells_name, 741 fdt_get_name(blob, node, 742 NULL)); 743 goto err; 744 } 745 } else { 746 count = cell_count; 747 } 748 749 /* 750 * Make sure that the arguments actually fit in the 751 * remaining property data length 752 */ 753 if (list + count > list_end) { 754 debug("%s: arguments longer than property\n", 755 fdt_get_name(blob, src_node, NULL)); 756 goto err; 757 } 758 } 759 760 /* 761 * All of the error cases above bail out of the loop, so at 762 * this point, the parsing is successful. If the requested 763 * index matches, then fill the out_args structure and return, 764 * or return -ENOENT for an empty entry. 765 */ 766 rc = -ENOENT; 767 if (cur_index == index) { 768 if (!phandle) 769 goto err; 770 771 if (out_args) { 772 int i; 773 774 if (count > MAX_PHANDLE_ARGS) { 775 debug("%s: too many arguments %d\n", 776 fdt_get_name(blob, src_node, 777 NULL), count); 778 count = MAX_PHANDLE_ARGS; 779 } 780 out_args->node = node; 781 out_args->args_count = count; 782 for (i = 0; i < count; i++) { 783 out_args->args[i] = 784 be32_to_cpup(list++); 785 } 786 } 787 788 /* Found it! return success */ 789 return 0; 790 } 791 792 node = -1; 793 list += count; 794 cur_index++; 795 } 796 797 /* 798 * Result will be one of: 799 * -ENOENT : index is for empty phandle 800 * -EINVAL : parsing error on data 801 * [1..n] : Number of phandle (count mode; when index = -1) 802 */ 803 rc = index < 0 ? cur_index : -ENOENT; 804 err: 805 return rc; 806 } 807 808 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 809 u8 *array, int count) 810 { 811 const u8 *cell; 812 int err; 813 814 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 815 if (!err) 816 memcpy(array, cell, count); 817 return err; 818 } 819 820 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 821 const char *prop_name, int count) 822 { 823 const u8 *cell; 824 int err; 825 826 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 827 if (err) 828 return NULL; 829 return cell; 830 } 831 832 int fdtdec_get_config_int(const void *blob, const char *prop_name, 833 int default_val) 834 { 835 int config_node; 836 837 debug("%s: %s\n", __func__, prop_name); 838 config_node = fdt_path_offset(blob, "/config"); 839 if (config_node < 0) 840 return default_val; 841 return fdtdec_get_int(blob, config_node, prop_name, default_val); 842 } 843 844 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 845 { 846 int config_node; 847 const void *prop; 848 849 debug("%s: %s\n", __func__, prop_name); 850 config_node = fdt_path_offset(blob, "/config"); 851 if (config_node < 0) 852 return 0; 853 prop = fdt_get_property(blob, config_node, prop_name, NULL); 854 855 return prop != NULL; 856 } 857 858 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 859 { 860 const char *nodep; 861 int nodeoffset; 862 int len; 863 864 debug("%s: %s\n", __func__, prop_name); 865 nodeoffset = fdt_path_offset(blob, "/config"); 866 if (nodeoffset < 0) 867 return NULL; 868 869 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 870 if (!nodep) 871 return NULL; 872 873 return (char *)nodep; 874 } 875 876 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 877 fdt_addr_t *basep, fdt_size_t *sizep) 878 { 879 const fdt_addr_t *cell; 880 int len; 881 882 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 883 prop_name); 884 cell = fdt_getprop(blob, node, prop_name, &len); 885 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 886 debug("cell=%p, len=%d\n", cell, len); 887 return -1; 888 } 889 890 *basep = fdt_addr_to_cpu(*cell); 891 *sizep = fdt_size_to_cpu(cell[1]); 892 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 893 (ulong)*sizep); 894 895 return 0; 896 } 897 898 /** 899 * Read a flash entry from the fdt 900 * 901 * @param blob FDT blob 902 * @param node Offset of node to read 903 * @param name Name of node being read 904 * @param entry Place to put offset and size of this node 905 * @return 0 if ok, -ve on error 906 */ 907 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 908 struct fmap_entry *entry) 909 { 910 const char *prop; 911 u32 reg[2]; 912 913 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 914 debug("Node '%s' has bad/missing 'reg' property\n", name); 915 return -FDT_ERR_NOTFOUND; 916 } 917 entry->offset = reg[0]; 918 entry->length = reg[1]; 919 entry->used = fdtdec_get_int(blob, node, "used", entry->length); 920 prop = fdt_getprop(blob, node, "compress", NULL); 921 entry->compress_algo = prop && !strcmp(prop, "lzo") ? 922 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; 923 prop = fdt_getprop(blob, node, "hash", &entry->hash_size); 924 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; 925 entry->hash = (uint8_t *)prop; 926 927 return 0; 928 } 929 930 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 931 { 932 u64 number = 0; 933 934 while (cells--) 935 number = (number << 32) | fdt32_to_cpu(*ptr++); 936 937 return number; 938 } 939 940 int fdt_get_resource(const void *fdt, int node, const char *property, 941 unsigned int index, struct fdt_resource *res) 942 { 943 const fdt32_t *ptr, *end; 944 int na, ns, len, parent; 945 unsigned int i = 0; 946 947 parent = fdt_parent_offset(fdt, node); 948 if (parent < 0) 949 return parent; 950 951 na = fdt_address_cells(fdt, parent); 952 ns = fdt_size_cells(fdt, parent); 953 954 ptr = fdt_getprop(fdt, node, property, &len); 955 if (!ptr) 956 return len; 957 958 end = ptr + len / sizeof(*ptr); 959 960 while (ptr + na + ns <= end) { 961 if (i == index) { 962 res->start = res->end = fdtdec_get_number(ptr, na); 963 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 964 return 0; 965 } 966 967 ptr += na + ns; 968 i++; 969 } 970 971 return -FDT_ERR_NOTFOUND; 972 } 973 974 int fdt_get_named_resource(const void *fdt, int node, const char *property, 975 const char *prop_names, const char *name, 976 struct fdt_resource *res) 977 { 978 int index; 979 980 index = fdt_find_string(fdt, node, prop_names, name); 981 if (index < 0) 982 return index; 983 984 return fdt_get_resource(fdt, node, property, index, res); 985 } 986 987 int fdtdec_decode_memory_region(const void *blob, int config_node, 988 const char *mem_type, const char *suffix, 989 fdt_addr_t *basep, fdt_size_t *sizep) 990 { 991 char prop_name[50]; 992 const char *mem; 993 fdt_size_t size, offset_size; 994 fdt_addr_t base, offset; 995 int node; 996 997 if (config_node == -1) { 998 config_node = fdt_path_offset(blob, "/config"); 999 if (config_node < 0) { 1000 debug("%s: Cannot find /config node\n", __func__); 1001 return -ENOENT; 1002 } 1003 } 1004 if (!suffix) 1005 suffix = ""; 1006 1007 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 1008 suffix); 1009 mem = fdt_getprop(blob, config_node, prop_name, NULL); 1010 if (!mem) { 1011 debug("%s: No memory type for '%s', using /memory\n", __func__, 1012 prop_name); 1013 mem = "/memory"; 1014 } 1015 1016 node = fdt_path_offset(blob, mem); 1017 if (node < 0) { 1018 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 1019 fdt_strerror(node)); 1020 return -ENOENT; 1021 } 1022 1023 /* 1024 * Not strictly correct - the memory may have multiple banks. We just 1025 * use the first 1026 */ 1027 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 1028 debug("%s: Failed to decode memory region %s\n", __func__, 1029 mem); 1030 return -EINVAL; 1031 } 1032 1033 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 1034 suffix); 1035 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 1036 &offset_size)) { 1037 debug("%s: Failed to decode memory region '%s'\n", __func__, 1038 prop_name); 1039 return -EINVAL; 1040 } 1041 1042 *basep = base + offset; 1043 *sizep = offset_size; 1044 1045 return 0; 1046 } 1047 1048 static int decode_timing_property(const void *blob, int node, const char *name, 1049 struct timing_entry *result) 1050 { 1051 int length, ret = 0; 1052 const u32 *prop; 1053 1054 prop = fdt_getprop(blob, node, name, &length); 1055 if (!prop) { 1056 debug("%s: could not find property %s\n", 1057 fdt_get_name(blob, node, NULL), name); 1058 return length; 1059 } 1060 1061 if (length == sizeof(u32)) { 1062 result->typ = fdtdec_get_int(blob, node, name, 0); 1063 result->min = result->typ; 1064 result->max = result->typ; 1065 } else { 1066 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3); 1067 } 1068 1069 return ret; 1070 } 1071 1072 int fdtdec_decode_display_timing(const void *blob, int parent, int index, 1073 struct display_timing *dt) 1074 { 1075 int i, node, timings_node; 1076 u32 val = 0; 1077 int ret = 0; 1078 1079 timings_node = fdt_subnode_offset(blob, parent, "display-timings"); 1080 if (timings_node < 0) 1081 return timings_node; 1082 1083 for (i = 0, node = fdt_first_subnode(blob, timings_node); 1084 node > 0 && i != index; 1085 node = fdt_next_subnode(blob, node)) 1086 i++; 1087 1088 if (node < 0) 1089 return node; 1090 1091 memset(dt, 0, sizeof(*dt)); 1092 1093 ret |= decode_timing_property(blob, node, "hback-porch", 1094 &dt->hback_porch); 1095 ret |= decode_timing_property(blob, node, "hfront-porch", 1096 &dt->hfront_porch); 1097 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive); 1098 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len); 1099 ret |= decode_timing_property(blob, node, "vback-porch", 1100 &dt->vback_porch); 1101 ret |= decode_timing_property(blob, node, "vfront-porch", 1102 &dt->vfront_porch); 1103 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive); 1104 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len); 1105 ret |= decode_timing_property(blob, node, "clock-frequency", 1106 &dt->pixelclock); 1107 1108 dt->flags = 0; 1109 val = fdtdec_get_int(blob, node, "vsync-active", -1); 1110 if (val != -1) { 1111 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : 1112 DISPLAY_FLAGS_VSYNC_LOW; 1113 } 1114 val = fdtdec_get_int(blob, node, "hsync-active", -1); 1115 if (val != -1) { 1116 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : 1117 DISPLAY_FLAGS_HSYNC_LOW; 1118 } 1119 val = fdtdec_get_int(blob, node, "de-active", -1); 1120 if (val != -1) { 1121 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : 1122 DISPLAY_FLAGS_DE_LOW; 1123 } 1124 val = fdtdec_get_int(blob, node, "pixelclk-active", -1); 1125 if (val != -1) { 1126 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : 1127 DISPLAY_FLAGS_PIXDATA_NEGEDGE; 1128 } 1129 1130 if (fdtdec_get_bool(blob, node, "interlaced")) 1131 dt->flags |= DISPLAY_FLAGS_INTERLACED; 1132 if (fdtdec_get_bool(blob, node, "doublescan")) 1133 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; 1134 if (fdtdec_get_bool(blob, node, "doubleclk")) 1135 dt->flags |= DISPLAY_FLAGS_DOUBLECLK; 1136 1137 return 0; 1138 } 1139 1140 int fdtdec_setup(void) 1141 { 1142 #if CONFIG_IS_ENABLED(OF_CONTROL) 1143 # ifdef CONFIG_OF_EMBED 1144 /* Get a pointer to the FDT */ 1145 gd->fdt_blob = __dtb_dt_begin; 1146 # elif defined CONFIG_OF_SEPARATE 1147 # ifdef CONFIG_SPL_BUILD 1148 /* FDT is at end of BSS */ 1149 gd->fdt_blob = (ulong *)&__bss_end; 1150 # else 1151 /* FDT is at end of image */ 1152 gd->fdt_blob = (ulong *)&_end; 1153 # endif 1154 # elif defined(CONFIG_OF_HOSTFILE) 1155 if (sandbox_read_fdt_from_file()) { 1156 puts("Failed to read control FDT\n"); 1157 return -1; 1158 } 1159 # endif 1160 # ifndef CONFIG_SPL_BUILD 1161 /* Allow the early environment to override the fdt address */ 1162 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, 1163 (uintptr_t)gd->fdt_blob); 1164 # endif 1165 #endif 1166 return fdtdec_prepare_fdt(); 1167 } 1168 1169 #endif /* !USE_HOSTCC */ 1170