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_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"), 35 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"), 36 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"), 37 COMPAT(NVIDIA_TEGRA124_PCIE, "nvidia,tegra124-pcie"), 38 COMPAT(NVIDIA_TEGRA30_PCIE, "nvidia,tegra30-pcie"), 39 COMPAT(NVIDIA_TEGRA20_PCIE, "nvidia,tegra20-pcie"), 40 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"), 41 COMPAT(SMSC_LAN9215, "smsc,lan9215"), 42 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), 43 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), 44 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), 45 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), 46 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"), 47 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), 48 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"), 49 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), 50 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"), 51 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"), 52 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"), 53 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), 54 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), 55 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"), 56 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"), 57 COMPAT(GENERIC_SPI_FLASH, "spi-flash"), 58 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), 59 COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"), 60 COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645tt"), 61 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), 62 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"), 63 COMPAT(TI_TPS65090, "ti,tps65090"), 64 COMPAT(COMPAT_NXP_PTN3460, "nxp,ptn3460"), 65 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), 66 COMPAT(PARADE_PS8625, "parade,ps8625"), 67 COMPAT(INTEL_MICROCODE, "intel,microcode"), 68 COMPAT(MEMORY_SPD, "memory-spd"), 69 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"), 70 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"), 71 COMPAT(INTEL_GMA, "intel,gma"), 72 COMPAT(AMS_AS3722, "ams,as3722"), 73 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"), 74 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"), 75 COMPAT(INTEL_X86_PINCTRL, "intel,x86-pinctrl"), 76 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"), 77 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"), 78 COMPAT(COMPAT_INTEL_IRQ_ROUTER, "intel,irq-router"), 79 }; 80 81 const char *fdtdec_get_compatible(enum fdt_compat_id id) 82 { 83 /* We allow reading of the 'unknown' ID for testing purposes */ 84 assert(id >= 0 && id < COMPAT_COUNT); 85 return compat_names[id]; 86 } 87 88 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 89 const char *prop_name, fdt_size_t *sizep) 90 { 91 const fdt_addr_t *cell; 92 int len; 93 94 debug("%s: %s: ", __func__, prop_name); 95 cell = fdt_getprop(blob, node, prop_name, &len); 96 if (cell && ((!sizep && len == sizeof(fdt_addr_t)) || 97 len == sizeof(fdt_addr_t) * 2)) { 98 fdt_addr_t addr = fdt_addr_to_cpu(*cell); 99 if (sizep) { 100 const fdt_size_t *size; 101 102 size = (fdt_size_t *)((char *)cell + 103 sizeof(fdt_addr_t)); 104 *sizep = fdt_size_to_cpu(*size); 105 debug("addr=%08lx, size=%llx\n", 106 (ulong)addr, (u64)*sizep); 107 } else { 108 debug("%08lx\n", (ulong)addr); 109 } 110 return addr; 111 } 112 debug("(not found)\n"); 113 return FDT_ADDR_T_NONE; 114 } 115 116 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 117 const char *prop_name) 118 { 119 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 120 } 121 122 #ifdef CONFIG_PCI 123 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 124 const char *prop_name, struct fdt_pci_addr *addr) 125 { 126 const u32 *cell; 127 int len; 128 int ret = -ENOENT; 129 130 debug("%s: %s: ", __func__, prop_name); 131 132 /* 133 * If we follow the pci bus bindings strictly, we should check 134 * the value of the node's parent node's #address-cells and 135 * #size-cells. They need to be 3 and 2 accordingly. However, 136 * for simplicity we skip the check here. 137 */ 138 cell = fdt_getprop(blob, node, prop_name, &len); 139 if (!cell) 140 goto fail; 141 142 if ((len % FDT_PCI_REG_SIZE) == 0) { 143 int num = len / FDT_PCI_REG_SIZE; 144 int i; 145 146 for (i = 0; i < num; i++) { 147 debug("pci address #%d: %08lx %08lx %08lx\n", i, 148 (ulong)fdt_addr_to_cpu(cell[0]), 149 (ulong)fdt_addr_to_cpu(cell[1]), 150 (ulong)fdt_addr_to_cpu(cell[2])); 151 if ((fdt_addr_to_cpu(*cell) & type) == type) { 152 addr->phys_hi = fdt_addr_to_cpu(cell[0]); 153 addr->phys_mid = fdt_addr_to_cpu(cell[1]); 154 addr->phys_lo = fdt_addr_to_cpu(cell[2]); 155 break; 156 } else { 157 cell += (FDT_PCI_ADDR_CELLS + 158 FDT_PCI_SIZE_CELLS); 159 } 160 } 161 162 if (i == num) { 163 ret = -ENXIO; 164 goto fail; 165 } 166 167 return 0; 168 } else { 169 ret = -EINVAL; 170 } 171 172 fail: 173 debug("(not found)\n"); 174 return ret; 175 } 176 177 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 178 { 179 const char *list, *end; 180 int len; 181 182 list = fdt_getprop(blob, node, "compatible", &len); 183 if (!list) 184 return -ENOENT; 185 186 end = list + len; 187 while (list < end) { 188 char *s; 189 190 len = strlen(list); 191 if (len >= strlen("pciVVVV,DDDD")) { 192 s = strstr(list, "pci"); 193 194 /* 195 * check if the string is something like pciVVVV,DDDD.RR 196 * or just pciVVVV,DDDD 197 */ 198 if (s && s[7] == ',' && 199 (s[12] == '.' || s[12] == 0)) { 200 s += 3; 201 *vendor = simple_strtol(s, NULL, 16); 202 203 s += 5; 204 *device = simple_strtol(s, NULL, 16); 205 206 return 0; 207 } 208 } else { 209 list += (len + 1); 210 } 211 } 212 213 return -ENOENT; 214 } 215 216 int fdtdec_get_pci_bdf(const void *blob, int node, 217 struct fdt_pci_addr *addr, pci_dev_t *bdf) 218 { 219 u16 dt_vendor, dt_device, vendor, device; 220 int ret; 221 222 /* get vendor id & device id from the compatible string */ 223 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device); 224 if (ret) 225 return ret; 226 227 /* extract the bdf from fdt_pci_addr */ 228 *bdf = addr->phys_hi & 0xffff00; 229 230 /* read vendor id & device id based on bdf */ 231 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor); 232 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device); 233 234 /* 235 * Note there are two places in the device tree to fully describe 236 * a pci device: one is via compatible string with a format of 237 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in 238 * the device node's reg address property. We read the vendor id 239 * and device id based on bdf and compare the values with the 240 * "VVVV,DDDD". If they are the same, then we are good to use bdf 241 * to read device's bar. But if they are different, we have to rely 242 * on the vendor id and device id extracted from the compatible 243 * string and locate the real bdf by pci_find_device(). This is 244 * because normally we may only know device's device number and 245 * function number when writing device tree. The bus number is 246 * dynamically assigned during the pci enumeration process. 247 */ 248 if ((dt_vendor != vendor) || (dt_device != device)) { 249 *bdf = pci_find_device(dt_vendor, dt_device, 0); 250 if (*bdf == -1) 251 return -ENODEV; 252 } 253 254 return 0; 255 } 256 257 int fdtdec_get_pci_bar32(const void *blob, int node, 258 struct fdt_pci_addr *addr, u32 *bar) 259 { 260 pci_dev_t bdf; 261 int barnum; 262 int ret; 263 264 /* get pci devices's bdf */ 265 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf); 266 if (ret) 267 return ret; 268 269 /* extract the bar number from fdt_pci_addr */ 270 barnum = addr->phys_hi & 0xff; 271 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) 272 return -EINVAL; 273 274 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; 275 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum); 276 277 return 0; 278 } 279 #endif 280 281 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 282 uint64_t default_val) 283 { 284 const uint64_t *cell64; 285 int length; 286 287 cell64 = fdt_getprop(blob, node, prop_name, &length); 288 if (!cell64 || length < sizeof(*cell64)) 289 return default_val; 290 291 return fdt64_to_cpu(*cell64); 292 } 293 294 int fdtdec_get_is_enabled(const void *blob, int node) 295 { 296 const char *cell; 297 298 /* 299 * It should say "okay", so only allow that. Some fdts use "ok" but 300 * this is a bug. Please fix your device tree source file. See here 301 * for discussion: 302 * 303 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 304 */ 305 cell = fdt_getprop(blob, node, "status", NULL); 306 if (cell) 307 return 0 == strcmp(cell, "okay"); 308 return 1; 309 } 310 311 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 312 { 313 enum fdt_compat_id id; 314 315 /* Search our drivers */ 316 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 317 if (0 == fdt_node_check_compatible(blob, node, 318 compat_names[id])) 319 return id; 320 return COMPAT_UNKNOWN; 321 } 322 323 int fdtdec_next_compatible(const void *blob, int node, 324 enum fdt_compat_id id) 325 { 326 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 327 } 328 329 int fdtdec_next_compatible_subnode(const void *blob, int node, 330 enum fdt_compat_id id, int *depthp) 331 { 332 do { 333 node = fdt_next_node(blob, node, depthp); 334 } while (*depthp > 1); 335 336 /* If this is a direct subnode, and compatible, return it */ 337 if (*depthp == 1 && 0 == fdt_node_check_compatible( 338 blob, node, compat_names[id])) 339 return node; 340 341 return -FDT_ERR_NOTFOUND; 342 } 343 344 int fdtdec_next_alias(const void *blob, const char *name, 345 enum fdt_compat_id id, int *upto) 346 { 347 #define MAX_STR_LEN 20 348 char str[MAX_STR_LEN + 20]; 349 int node, err; 350 351 /* snprintf() is not available */ 352 assert(strlen(name) < MAX_STR_LEN); 353 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 354 node = fdt_path_offset(blob, str); 355 if (node < 0) 356 return node; 357 err = fdt_node_check_compatible(blob, node, compat_names[id]); 358 if (err < 0) 359 return err; 360 if (err) 361 return -FDT_ERR_NOTFOUND; 362 (*upto)++; 363 return node; 364 } 365 366 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 367 enum fdt_compat_id id, int *node_list, int maxcount) 368 { 369 memset(node_list, '\0', sizeof(*node_list) * maxcount); 370 371 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 372 } 373 374 /* TODO: Can we tighten this code up a little? */ 375 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 376 enum fdt_compat_id id, int *node_list, int maxcount) 377 { 378 int name_len = strlen(name); 379 int nodes[maxcount]; 380 int num_found = 0; 381 int offset, node; 382 int alias_node; 383 int count; 384 int i, j; 385 386 /* find the alias node if present */ 387 alias_node = fdt_path_offset(blob, "/aliases"); 388 389 /* 390 * start with nothing, and we can assume that the root node can't 391 * match 392 */ 393 memset(nodes, '\0', sizeof(nodes)); 394 395 /* First find all the compatible nodes */ 396 for (node = count = 0; node >= 0 && count < maxcount;) { 397 node = fdtdec_next_compatible(blob, node, id); 398 if (node >= 0) 399 nodes[count++] = node; 400 } 401 if (node >= 0) 402 debug("%s: warning: maxcount exceeded with alias '%s'\n", 403 __func__, name); 404 405 /* Now find all the aliases */ 406 for (offset = fdt_first_property_offset(blob, alias_node); 407 offset > 0; 408 offset = fdt_next_property_offset(blob, offset)) { 409 const struct fdt_property *prop; 410 const char *path; 411 int number; 412 int found; 413 414 node = 0; 415 prop = fdt_get_property_by_offset(blob, offset, NULL); 416 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 417 if (prop->len && 0 == strncmp(path, name, name_len)) 418 node = fdt_path_offset(blob, prop->data); 419 if (node <= 0) 420 continue; 421 422 /* Get the alias number */ 423 number = simple_strtoul(path + name_len, NULL, 10); 424 if (number < 0 || number >= maxcount) { 425 debug("%s: warning: alias '%s' is out of range\n", 426 __func__, path); 427 continue; 428 } 429 430 /* Make sure the node we found is actually in our list! */ 431 found = -1; 432 for (j = 0; j < count; j++) 433 if (nodes[j] == node) { 434 found = j; 435 break; 436 } 437 438 if (found == -1) { 439 debug("%s: warning: alias '%s' points to a node " 440 "'%s' that is missing or is not compatible " 441 " with '%s'\n", __func__, path, 442 fdt_get_name(blob, node, NULL), 443 compat_names[id]); 444 continue; 445 } 446 447 /* 448 * Add this node to our list in the right place, and mark 449 * it as done. 450 */ 451 if (fdtdec_get_is_enabled(blob, node)) { 452 if (node_list[number]) { 453 debug("%s: warning: alias '%s' requires that " 454 "a node be placed in the list in a " 455 "position which is already filled by " 456 "node '%s'\n", __func__, path, 457 fdt_get_name(blob, node, NULL)); 458 continue; 459 } 460 node_list[number] = node; 461 if (number >= num_found) 462 num_found = number + 1; 463 } 464 nodes[found] = 0; 465 } 466 467 /* Add any nodes not mentioned by an alias */ 468 for (i = j = 0; i < maxcount; i++) { 469 if (!node_list[i]) { 470 for (; j < maxcount; j++) 471 if (nodes[j] && 472 fdtdec_get_is_enabled(blob, nodes[j])) 473 break; 474 475 /* Have we run out of nodes to add? */ 476 if (j == maxcount) 477 break; 478 479 assert(!node_list[i]); 480 node_list[i] = nodes[j++]; 481 if (i >= num_found) 482 num_found = i + 1; 483 } 484 } 485 486 return num_found; 487 } 488 489 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 490 int *seqp) 491 { 492 int base_len = strlen(base); 493 const char *find_name; 494 int find_namelen; 495 int prop_offset; 496 int aliases; 497 498 find_name = fdt_get_name(blob, offset, &find_namelen); 499 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 500 501 aliases = fdt_path_offset(blob, "/aliases"); 502 for (prop_offset = fdt_first_property_offset(blob, aliases); 503 prop_offset > 0; 504 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 505 const char *prop; 506 const char *name; 507 const char *slash; 508 int len, val; 509 510 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 511 debug(" - %s, %s\n", name, prop); 512 if (len < find_namelen || *prop != '/' || prop[len - 1] || 513 strncmp(name, base, base_len)) 514 continue; 515 516 slash = strrchr(prop, '/'); 517 if (strcmp(slash + 1, find_name)) 518 continue; 519 val = trailing_strtol(name); 520 if (val != -1) { 521 *seqp = val; 522 debug("Found seq %d\n", *seqp); 523 return 0; 524 } 525 } 526 527 debug("Not found\n"); 528 return -ENOENT; 529 } 530 531 int fdtdec_get_chosen_node(const void *blob, const char *name) 532 { 533 const char *prop; 534 int chosen_node; 535 int len; 536 537 if (!blob) 538 return -FDT_ERR_NOTFOUND; 539 chosen_node = fdt_path_offset(blob, "/chosen"); 540 prop = fdt_getprop(blob, chosen_node, name, &len); 541 if (!prop) 542 return -FDT_ERR_NOTFOUND; 543 return fdt_path_offset(blob, prop); 544 } 545 546 int fdtdec_check_fdt(void) 547 { 548 /* 549 * We must have an FDT, but we cannot panic() yet since the console 550 * is not ready. So for now, just assert(). Boards which need an early 551 * FDT (prior to console ready) will need to make their own 552 * arrangements and do their own checks. 553 */ 554 assert(!fdtdec_prepare_fdt()); 555 return 0; 556 } 557 558 /* 559 * This function is a little odd in that it accesses global data. At some 560 * point if the architecture board.c files merge this will make more sense. 561 * Even now, it is common code. 562 */ 563 int fdtdec_prepare_fdt(void) 564 { 565 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 566 fdt_check_header(gd->fdt_blob)) { 567 #ifdef CONFIG_SPL_BUILD 568 puts("Missing DTB\n"); 569 #else 570 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"); 571 #endif 572 return -1; 573 } 574 return 0; 575 } 576 577 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 578 { 579 const u32 *phandle; 580 int lookup; 581 582 debug("%s: %s\n", __func__, prop_name); 583 phandle = fdt_getprop(blob, node, prop_name, NULL); 584 if (!phandle) 585 return -FDT_ERR_NOTFOUND; 586 587 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 588 return lookup; 589 } 590 591 /** 592 * Look up a property in a node and check that it has a minimum length. 593 * 594 * @param blob FDT blob 595 * @param node node to examine 596 * @param prop_name name of property to find 597 * @param min_len minimum property length in bytes 598 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 599 found, or -FDT_ERR_BADLAYOUT if not enough data 600 * @return pointer to cell, which is only valid if err == 0 601 */ 602 static const void *get_prop_check_min_len(const void *blob, int node, 603 const char *prop_name, int min_len, int *err) 604 { 605 const void *cell; 606 int len; 607 608 debug("%s: %s\n", __func__, prop_name); 609 cell = fdt_getprop(blob, node, prop_name, &len); 610 if (!cell) 611 *err = -FDT_ERR_NOTFOUND; 612 else if (len < min_len) 613 *err = -FDT_ERR_BADLAYOUT; 614 else 615 *err = 0; 616 return cell; 617 } 618 619 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 620 u32 *array, int count) 621 { 622 const u32 *cell; 623 int i, err = 0; 624 625 debug("%s: %s\n", __func__, prop_name); 626 cell = get_prop_check_min_len(blob, node, prop_name, 627 sizeof(u32) * count, &err); 628 if (!err) { 629 for (i = 0; i < count; i++) 630 array[i] = fdt32_to_cpu(cell[i]); 631 } 632 return err; 633 } 634 635 int fdtdec_get_int_array_count(const void *blob, int node, 636 const char *prop_name, u32 *array, int count) 637 { 638 const u32 *cell; 639 int len, elems; 640 int i; 641 642 debug("%s: %s\n", __func__, prop_name); 643 cell = fdt_getprop(blob, node, prop_name, &len); 644 if (!cell) 645 return -FDT_ERR_NOTFOUND; 646 elems = len / sizeof(u32); 647 if (count > elems) 648 count = elems; 649 for (i = 0; i < count; i++) 650 array[i] = fdt32_to_cpu(cell[i]); 651 652 return count; 653 } 654 655 const u32 *fdtdec_locate_array(const void *blob, int node, 656 const char *prop_name, int count) 657 { 658 const u32 *cell; 659 int err; 660 661 cell = get_prop_check_min_len(blob, node, prop_name, 662 sizeof(u32) * count, &err); 663 return err ? NULL : cell; 664 } 665 666 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 667 { 668 const s32 *cell; 669 int len; 670 671 debug("%s: %s\n", __func__, prop_name); 672 cell = fdt_getprop(blob, node, prop_name, &len); 673 return cell != NULL; 674 } 675 676 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 677 const char *list_name, 678 const char *cells_name, 679 int cell_count, int index, 680 struct fdtdec_phandle_args *out_args) 681 { 682 const __be32 *list, *list_end; 683 int rc = 0, size, cur_index = 0; 684 uint32_t count = 0; 685 int node = -1; 686 int phandle; 687 688 /* Retrieve the phandle list property */ 689 list = fdt_getprop(blob, src_node, list_name, &size); 690 if (!list) 691 return -ENOENT; 692 list_end = list + size / sizeof(*list); 693 694 /* Loop over the phandles until all the requested entry is found */ 695 while (list < list_end) { 696 rc = -EINVAL; 697 count = 0; 698 699 /* 700 * If phandle is 0, then it is an empty entry with no 701 * arguments. Skip forward to the next entry. 702 */ 703 phandle = be32_to_cpup(list++); 704 if (phandle) { 705 /* 706 * Find the provider node and parse the #*-cells 707 * property to determine the argument length. 708 * 709 * This is not needed if the cell count is hard-coded 710 * (i.e. cells_name not set, but cell_count is set), 711 * except when we're going to return the found node 712 * below. 713 */ 714 if (cells_name || cur_index == index) { 715 node = fdt_node_offset_by_phandle(blob, 716 phandle); 717 if (!node) { 718 debug("%s: could not find phandle\n", 719 fdt_get_name(blob, src_node, 720 NULL)); 721 goto err; 722 } 723 } 724 725 if (cells_name) { 726 count = fdtdec_get_int(blob, node, cells_name, 727 -1); 728 if (count == -1) { 729 debug("%s: could not get %s for %s\n", 730 fdt_get_name(blob, src_node, 731 NULL), 732 cells_name, 733 fdt_get_name(blob, node, 734 NULL)); 735 goto err; 736 } 737 } else { 738 count = cell_count; 739 } 740 741 /* 742 * Make sure that the arguments actually fit in the 743 * remaining property data length 744 */ 745 if (list + count > list_end) { 746 debug("%s: arguments longer than property\n", 747 fdt_get_name(blob, src_node, NULL)); 748 goto err; 749 } 750 } 751 752 /* 753 * All of the error cases above bail out of the loop, so at 754 * this point, the parsing is successful. If the requested 755 * index matches, then fill the out_args structure and return, 756 * or return -ENOENT for an empty entry. 757 */ 758 rc = -ENOENT; 759 if (cur_index == index) { 760 if (!phandle) 761 goto err; 762 763 if (out_args) { 764 int i; 765 766 if (count > MAX_PHANDLE_ARGS) { 767 debug("%s: too many arguments %d\n", 768 fdt_get_name(blob, src_node, 769 NULL), count); 770 count = MAX_PHANDLE_ARGS; 771 } 772 out_args->node = node; 773 out_args->args_count = count; 774 for (i = 0; i < count; i++) { 775 out_args->args[i] = 776 be32_to_cpup(list++); 777 } 778 } 779 780 /* Found it! return success */ 781 return 0; 782 } 783 784 node = -1; 785 list += count; 786 cur_index++; 787 } 788 789 /* 790 * Result will be one of: 791 * -ENOENT : index is for empty phandle 792 * -EINVAL : parsing error on data 793 * [1..n] : Number of phandle (count mode; when index = -1) 794 */ 795 rc = index < 0 ? cur_index : -ENOENT; 796 err: 797 return rc; 798 } 799 800 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 801 u8 *array, int count) 802 { 803 const u8 *cell; 804 int err; 805 806 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 807 if (!err) 808 memcpy(array, cell, count); 809 return err; 810 } 811 812 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 813 const char *prop_name, int count) 814 { 815 const u8 *cell; 816 int err; 817 818 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 819 if (err) 820 return NULL; 821 return cell; 822 } 823 824 int fdtdec_get_config_int(const void *blob, const char *prop_name, 825 int default_val) 826 { 827 int config_node; 828 829 debug("%s: %s\n", __func__, prop_name); 830 config_node = fdt_path_offset(blob, "/config"); 831 if (config_node < 0) 832 return default_val; 833 return fdtdec_get_int(blob, config_node, prop_name, default_val); 834 } 835 836 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 837 { 838 int config_node; 839 const void *prop; 840 841 debug("%s: %s\n", __func__, prop_name); 842 config_node = fdt_path_offset(blob, "/config"); 843 if (config_node < 0) 844 return 0; 845 prop = fdt_get_property(blob, config_node, prop_name, NULL); 846 847 return prop != NULL; 848 } 849 850 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 851 { 852 const char *nodep; 853 int nodeoffset; 854 int len; 855 856 debug("%s: %s\n", __func__, prop_name); 857 nodeoffset = fdt_path_offset(blob, "/config"); 858 if (nodeoffset < 0) 859 return NULL; 860 861 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 862 if (!nodep) 863 return NULL; 864 865 return (char *)nodep; 866 } 867 868 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 869 fdt_addr_t *basep, fdt_size_t *sizep) 870 { 871 const fdt_addr_t *cell; 872 int len; 873 874 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 875 prop_name); 876 cell = fdt_getprop(blob, node, prop_name, &len); 877 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 878 debug("cell=%p, len=%d\n", cell, len); 879 return -1; 880 } 881 882 *basep = fdt_addr_to_cpu(*cell); 883 *sizep = fdt_size_to_cpu(cell[1]); 884 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 885 (ulong)*sizep); 886 887 return 0; 888 } 889 890 /** 891 * Read a flash entry from the fdt 892 * 893 * @param blob FDT blob 894 * @param node Offset of node to read 895 * @param name Name of node being read 896 * @param entry Place to put offset and size of this node 897 * @return 0 if ok, -ve on error 898 */ 899 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 900 struct fmap_entry *entry) 901 { 902 const char *prop; 903 u32 reg[2]; 904 905 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 906 debug("Node '%s' has bad/missing 'reg' property\n", name); 907 return -FDT_ERR_NOTFOUND; 908 } 909 entry->offset = reg[0]; 910 entry->length = reg[1]; 911 entry->used = fdtdec_get_int(blob, node, "used", entry->length); 912 prop = fdt_getprop(blob, node, "compress", NULL); 913 entry->compress_algo = prop && !strcmp(prop, "lzo") ? 914 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; 915 prop = fdt_getprop(blob, node, "hash", &entry->hash_size); 916 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; 917 entry->hash = (uint8_t *)prop; 918 919 return 0; 920 } 921 922 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 923 { 924 u64 number = 0; 925 926 while (cells--) 927 number = (number << 32) | fdt32_to_cpu(*ptr++); 928 929 return number; 930 } 931 932 int fdt_get_resource(const void *fdt, int node, const char *property, 933 unsigned int index, struct fdt_resource *res) 934 { 935 const fdt32_t *ptr, *end; 936 int na, ns, len, parent; 937 unsigned int i = 0; 938 939 parent = fdt_parent_offset(fdt, node); 940 if (parent < 0) 941 return parent; 942 943 na = fdt_address_cells(fdt, parent); 944 ns = fdt_size_cells(fdt, parent); 945 946 ptr = fdt_getprop(fdt, node, property, &len); 947 if (!ptr) 948 return len; 949 950 end = ptr + len / sizeof(*ptr); 951 952 while (ptr + na + ns <= end) { 953 if (i == index) { 954 res->start = res->end = fdtdec_get_number(ptr, na); 955 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 956 return 0; 957 } 958 959 ptr += na + ns; 960 i++; 961 } 962 963 return -FDT_ERR_NOTFOUND; 964 } 965 966 int fdt_get_named_resource(const void *fdt, int node, const char *property, 967 const char *prop_names, const char *name, 968 struct fdt_resource *res) 969 { 970 int index; 971 972 index = fdt_find_string(fdt, node, prop_names, name); 973 if (index < 0) 974 return index; 975 976 return fdt_get_resource(fdt, node, property, index, res); 977 } 978 979 int fdtdec_decode_memory_region(const void *blob, int config_node, 980 const char *mem_type, const char *suffix, 981 fdt_addr_t *basep, fdt_size_t *sizep) 982 { 983 char prop_name[50]; 984 const char *mem; 985 fdt_size_t size, offset_size; 986 fdt_addr_t base, offset; 987 int node; 988 989 if (config_node == -1) { 990 config_node = fdt_path_offset(blob, "/config"); 991 if (config_node < 0) { 992 debug("%s: Cannot find /config node\n", __func__); 993 return -ENOENT; 994 } 995 } 996 if (!suffix) 997 suffix = ""; 998 999 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 1000 suffix); 1001 mem = fdt_getprop(blob, config_node, prop_name, NULL); 1002 if (!mem) { 1003 debug("%s: No memory type for '%s', using /memory\n", __func__, 1004 prop_name); 1005 mem = "/memory"; 1006 } 1007 1008 node = fdt_path_offset(blob, mem); 1009 if (node < 0) { 1010 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 1011 fdt_strerror(node)); 1012 return -ENOENT; 1013 } 1014 1015 /* 1016 * Not strictly correct - the memory may have multiple banks. We just 1017 * use the first 1018 */ 1019 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 1020 debug("%s: Failed to decode memory region %s\n", __func__, 1021 mem); 1022 return -EINVAL; 1023 } 1024 1025 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 1026 suffix); 1027 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 1028 &offset_size)) { 1029 debug("%s: Failed to decode memory region '%s'\n", __func__, 1030 prop_name); 1031 return -EINVAL; 1032 } 1033 1034 *basep = base + offset; 1035 *sizep = offset_size; 1036 1037 return 0; 1038 } 1039 1040 static int decode_timing_property(const void *blob, int node, const char *name, 1041 struct timing_entry *result) 1042 { 1043 int length, ret = 0; 1044 const u32 *prop; 1045 1046 prop = fdt_getprop(blob, node, name, &length); 1047 if (!prop) { 1048 debug("%s: could not find property %s\n", 1049 fdt_get_name(blob, node, NULL), name); 1050 return length; 1051 } 1052 1053 if (length == sizeof(u32)) { 1054 result->typ = fdtdec_get_int(blob, node, name, 0); 1055 result->min = result->typ; 1056 result->max = result->typ; 1057 } else { 1058 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3); 1059 } 1060 1061 return ret; 1062 } 1063 1064 int fdtdec_decode_display_timing(const void *blob, int parent, int index, 1065 struct display_timing *dt) 1066 { 1067 int i, node, timings_node; 1068 u32 val = 0; 1069 int ret = 0; 1070 1071 timings_node = fdt_subnode_offset(blob, parent, "display-timings"); 1072 if (timings_node < 0) 1073 return timings_node; 1074 1075 for (i = 0, node = fdt_first_subnode(blob, timings_node); 1076 node > 0 && i != index; 1077 node = fdt_next_subnode(blob, node)) 1078 i++; 1079 1080 if (node < 0) 1081 return node; 1082 1083 memset(dt, 0, sizeof(*dt)); 1084 1085 ret |= decode_timing_property(blob, node, "hback-porch", 1086 &dt->hback_porch); 1087 ret |= decode_timing_property(blob, node, "hfront-porch", 1088 &dt->hfront_porch); 1089 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive); 1090 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len); 1091 ret |= decode_timing_property(blob, node, "vback-porch", 1092 &dt->vback_porch); 1093 ret |= decode_timing_property(blob, node, "vfront-porch", 1094 &dt->vfront_porch); 1095 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive); 1096 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len); 1097 ret |= decode_timing_property(blob, node, "clock-frequency", 1098 &dt->pixelclock); 1099 1100 dt->flags = 0; 1101 val = fdtdec_get_int(blob, node, "vsync-active", -1); 1102 if (val != -1) { 1103 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : 1104 DISPLAY_FLAGS_VSYNC_LOW; 1105 } 1106 val = fdtdec_get_int(blob, node, "hsync-active", -1); 1107 if (val != -1) { 1108 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : 1109 DISPLAY_FLAGS_HSYNC_LOW; 1110 } 1111 val = fdtdec_get_int(blob, node, "de-active", -1); 1112 if (val != -1) { 1113 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : 1114 DISPLAY_FLAGS_DE_LOW; 1115 } 1116 val = fdtdec_get_int(blob, node, "pixelclk-active", -1); 1117 if (val != -1) { 1118 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : 1119 DISPLAY_FLAGS_PIXDATA_NEGEDGE; 1120 } 1121 1122 if (fdtdec_get_bool(blob, node, "interlaced")) 1123 dt->flags |= DISPLAY_FLAGS_INTERLACED; 1124 if (fdtdec_get_bool(blob, node, "doublescan")) 1125 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; 1126 if (fdtdec_get_bool(blob, node, "doubleclk")) 1127 dt->flags |= DISPLAY_FLAGS_DOUBLECLK; 1128 1129 return 0; 1130 } 1131 1132 int fdtdec_setup(void) 1133 { 1134 #ifdef CONFIG_OF_CONTROL 1135 # ifdef CONFIG_OF_EMBED 1136 /* Get a pointer to the FDT */ 1137 gd->fdt_blob = __dtb_dt_begin; 1138 # elif defined CONFIG_OF_SEPARATE 1139 # ifdef CONFIG_SPL_BUILD 1140 /* FDT is at end of BSS */ 1141 gd->fdt_blob = (ulong *)&__bss_end; 1142 # else 1143 /* FDT is at end of image */ 1144 gd->fdt_blob = (ulong *)&_end; 1145 #endif 1146 # elif defined(CONFIG_OF_HOSTFILE) 1147 if (sandbox_read_fdt_from_file()) { 1148 puts("Failed to read control FDT\n"); 1149 return -1; 1150 } 1151 # endif 1152 # ifndef CONFIG_SPL_BUILD 1153 /* Allow the early environment to override the fdt address */ 1154 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, 1155 (uintptr_t)gd->fdt_blob); 1156 # endif 1157 #endif 1158 return fdtdec_prepare_fdt(); 1159 } 1160 1161 #endif /* !USE_HOSTCC */ 1162