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(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), 62 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"), 63 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), 64 COMPAT(INTEL_MICROCODE, "intel,microcode"), 65 COMPAT(MEMORY_SPD, "memory-spd"), 66 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"), 67 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"), 68 COMPAT(INTEL_GMA, "intel,gma"), 69 COMPAT(AMS_AS3722, "ams,as3722"), 70 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"), 71 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"), 72 COMPAT(INTEL_X86_PINCTRL, "intel,x86-pinctrl"), 73 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"), 74 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"), 75 COMPAT(COMPAT_INTEL_IRQ_ROUTER, "intel,irq-router"), 76 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"), 77 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"), 78 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"), 79 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"), 80 }; 81 82 const char *fdtdec_get_compatible(enum fdt_compat_id id) 83 { 84 /* We allow reading of the 'unknown' ID for testing purposes */ 85 assert(id >= 0 && id < COMPAT_COUNT); 86 return compat_names[id]; 87 } 88 89 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 90 const char *prop_name, fdt_size_t *sizep) 91 { 92 const fdt_addr_t *cell; 93 int len; 94 95 debug("%s: %s: ", __func__, prop_name); 96 cell = fdt_getprop(blob, node, prop_name, &len); 97 if (cell && ((!sizep && len == sizeof(fdt_addr_t)) || 98 len == sizeof(fdt_addr_t) * 2)) { 99 fdt_addr_t addr = fdt_addr_to_cpu(*cell); 100 if (sizep) { 101 const fdt_size_t *size; 102 103 size = (fdt_size_t *)((char *)cell + 104 sizeof(fdt_addr_t)); 105 *sizep = fdt_size_to_cpu(*size); 106 debug("addr=%08lx, size=%llx\n", 107 (ulong)addr, (u64)*sizep); 108 } else { 109 debug("%08lx\n", (ulong)addr); 110 } 111 return addr; 112 } 113 debug("(not found)\n"); 114 return FDT_ADDR_T_NONE; 115 } 116 117 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 118 const char *prop_name) 119 { 120 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 121 } 122 123 #ifdef CONFIG_PCI 124 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 125 const char *prop_name, struct fdt_pci_addr *addr) 126 { 127 const u32 *cell; 128 int len; 129 int ret = -ENOENT; 130 131 debug("%s: %s: ", __func__, prop_name); 132 133 /* 134 * If we follow the pci bus bindings strictly, we should check 135 * the value of the node's parent node's #address-cells and 136 * #size-cells. They need to be 3 and 2 accordingly. However, 137 * for simplicity we skip the check here. 138 */ 139 cell = fdt_getprop(blob, node, prop_name, &len); 140 if (!cell) 141 goto fail; 142 143 if ((len % FDT_PCI_REG_SIZE) == 0) { 144 int num = len / FDT_PCI_REG_SIZE; 145 int i; 146 147 for (i = 0; i < num; i++) { 148 debug("pci address #%d: %08lx %08lx %08lx\n", i, 149 (ulong)fdt_addr_to_cpu(cell[0]), 150 (ulong)fdt_addr_to_cpu(cell[1]), 151 (ulong)fdt_addr_to_cpu(cell[2])); 152 if ((fdt_addr_to_cpu(*cell) & type) == type) { 153 addr->phys_hi = fdt_addr_to_cpu(cell[0]); 154 addr->phys_mid = fdt_addr_to_cpu(cell[1]); 155 addr->phys_lo = fdt_addr_to_cpu(cell[2]); 156 break; 157 } else { 158 cell += (FDT_PCI_ADDR_CELLS + 159 FDT_PCI_SIZE_CELLS); 160 } 161 } 162 163 if (i == num) { 164 ret = -ENXIO; 165 goto fail; 166 } 167 168 return 0; 169 } else { 170 ret = -EINVAL; 171 } 172 173 fail: 174 debug("(not found)\n"); 175 return ret; 176 } 177 178 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 179 { 180 const char *list, *end; 181 int len; 182 183 list = fdt_getprop(blob, node, "compatible", &len); 184 if (!list) 185 return -ENOENT; 186 187 end = list + len; 188 while (list < end) { 189 char *s; 190 191 len = strlen(list); 192 if (len >= strlen("pciVVVV,DDDD")) { 193 s = strstr(list, "pci"); 194 195 /* 196 * check if the string is something like pciVVVV,DDDD.RR 197 * or just pciVVVV,DDDD 198 */ 199 if (s && s[7] == ',' && 200 (s[12] == '.' || s[12] == 0)) { 201 s += 3; 202 *vendor = simple_strtol(s, NULL, 16); 203 204 s += 5; 205 *device = simple_strtol(s, NULL, 16); 206 207 return 0; 208 } 209 } 210 list += (len + 1); 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 # ifdef DEBUG 572 if (gd->fdt_blob) { 573 printf("fdt_blob=%p\n", gd->fdt_blob); 574 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4, 575 32, 0); 576 } 577 # endif 578 #endif 579 return -1; 580 } 581 return 0; 582 } 583 584 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 585 { 586 const u32 *phandle; 587 int lookup; 588 589 debug("%s: %s\n", __func__, prop_name); 590 phandle = fdt_getprop(blob, node, prop_name, NULL); 591 if (!phandle) 592 return -FDT_ERR_NOTFOUND; 593 594 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 595 return lookup; 596 } 597 598 /** 599 * Look up a property in a node and check that it has a minimum length. 600 * 601 * @param blob FDT blob 602 * @param node node to examine 603 * @param prop_name name of property to find 604 * @param min_len minimum property length in bytes 605 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 606 found, or -FDT_ERR_BADLAYOUT if not enough data 607 * @return pointer to cell, which is only valid if err == 0 608 */ 609 static const void *get_prop_check_min_len(const void *blob, int node, 610 const char *prop_name, int min_len, int *err) 611 { 612 const void *cell; 613 int len; 614 615 debug("%s: %s\n", __func__, prop_name); 616 cell = fdt_getprop(blob, node, prop_name, &len); 617 if (!cell) 618 *err = -FDT_ERR_NOTFOUND; 619 else if (len < min_len) 620 *err = -FDT_ERR_BADLAYOUT; 621 else 622 *err = 0; 623 return cell; 624 } 625 626 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 627 u32 *array, int count) 628 { 629 const u32 *cell; 630 int i, err = 0; 631 632 debug("%s: %s\n", __func__, prop_name); 633 cell = get_prop_check_min_len(blob, node, prop_name, 634 sizeof(u32) * count, &err); 635 if (!err) { 636 for (i = 0; i < count; i++) 637 array[i] = fdt32_to_cpu(cell[i]); 638 } 639 return err; 640 } 641 642 int fdtdec_get_int_array_count(const void *blob, int node, 643 const char *prop_name, u32 *array, int count) 644 { 645 const u32 *cell; 646 int len, elems; 647 int i; 648 649 debug("%s: %s\n", __func__, prop_name); 650 cell = fdt_getprop(blob, node, prop_name, &len); 651 if (!cell) 652 return -FDT_ERR_NOTFOUND; 653 elems = len / sizeof(u32); 654 if (count > elems) 655 count = elems; 656 for (i = 0; i < count; i++) 657 array[i] = fdt32_to_cpu(cell[i]); 658 659 return count; 660 } 661 662 const u32 *fdtdec_locate_array(const void *blob, int node, 663 const char *prop_name, int count) 664 { 665 const u32 *cell; 666 int err; 667 668 cell = get_prop_check_min_len(blob, node, prop_name, 669 sizeof(u32) * count, &err); 670 return err ? NULL : cell; 671 } 672 673 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 674 { 675 const s32 *cell; 676 int len; 677 678 debug("%s: %s\n", __func__, prop_name); 679 cell = fdt_getprop(blob, node, prop_name, &len); 680 return cell != NULL; 681 } 682 683 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 684 const char *list_name, 685 const char *cells_name, 686 int cell_count, int index, 687 struct fdtdec_phandle_args *out_args) 688 { 689 const __be32 *list, *list_end; 690 int rc = 0, size, cur_index = 0; 691 uint32_t count = 0; 692 int node = -1; 693 int phandle; 694 695 /* Retrieve the phandle list property */ 696 list = fdt_getprop(blob, src_node, list_name, &size); 697 if (!list) 698 return -ENOENT; 699 list_end = list + size / sizeof(*list); 700 701 /* Loop over the phandles until all the requested entry is found */ 702 while (list < list_end) { 703 rc = -EINVAL; 704 count = 0; 705 706 /* 707 * If phandle is 0, then it is an empty entry with no 708 * arguments. Skip forward to the next entry. 709 */ 710 phandle = be32_to_cpup(list++); 711 if (phandle) { 712 /* 713 * Find the provider node and parse the #*-cells 714 * property to determine the argument length. 715 * 716 * This is not needed if the cell count is hard-coded 717 * (i.e. cells_name not set, but cell_count is set), 718 * except when we're going to return the found node 719 * below. 720 */ 721 if (cells_name || cur_index == index) { 722 node = fdt_node_offset_by_phandle(blob, 723 phandle); 724 if (!node) { 725 debug("%s: could not find phandle\n", 726 fdt_get_name(blob, src_node, 727 NULL)); 728 goto err; 729 } 730 } 731 732 if (cells_name) { 733 count = fdtdec_get_int(blob, node, cells_name, 734 -1); 735 if (count == -1) { 736 debug("%s: could not get %s for %s\n", 737 fdt_get_name(blob, src_node, 738 NULL), 739 cells_name, 740 fdt_get_name(blob, node, 741 NULL)); 742 goto err; 743 } 744 } else { 745 count = cell_count; 746 } 747 748 /* 749 * Make sure that the arguments actually fit in the 750 * remaining property data length 751 */ 752 if (list + count > list_end) { 753 debug("%s: arguments longer than property\n", 754 fdt_get_name(blob, src_node, NULL)); 755 goto err; 756 } 757 } 758 759 /* 760 * All of the error cases above bail out of the loop, so at 761 * this point, the parsing is successful. If the requested 762 * index matches, then fill the out_args structure and return, 763 * or return -ENOENT for an empty entry. 764 */ 765 rc = -ENOENT; 766 if (cur_index == index) { 767 if (!phandle) 768 goto err; 769 770 if (out_args) { 771 int i; 772 773 if (count > MAX_PHANDLE_ARGS) { 774 debug("%s: too many arguments %d\n", 775 fdt_get_name(blob, src_node, 776 NULL), count); 777 count = MAX_PHANDLE_ARGS; 778 } 779 out_args->node = node; 780 out_args->args_count = count; 781 for (i = 0; i < count; i++) { 782 out_args->args[i] = 783 be32_to_cpup(list++); 784 } 785 } 786 787 /* Found it! return success */ 788 return 0; 789 } 790 791 node = -1; 792 list += count; 793 cur_index++; 794 } 795 796 /* 797 * Result will be one of: 798 * -ENOENT : index is for empty phandle 799 * -EINVAL : parsing error on data 800 * [1..n] : Number of phandle (count mode; when index = -1) 801 */ 802 rc = index < 0 ? cur_index : -ENOENT; 803 err: 804 return rc; 805 } 806 807 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 808 u8 *array, int count) 809 { 810 const u8 *cell; 811 int err; 812 813 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 814 if (!err) 815 memcpy(array, cell, count); 816 return err; 817 } 818 819 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 820 const char *prop_name, int count) 821 { 822 const u8 *cell; 823 int err; 824 825 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 826 if (err) 827 return NULL; 828 return cell; 829 } 830 831 int fdtdec_get_config_int(const void *blob, const char *prop_name, 832 int default_val) 833 { 834 int config_node; 835 836 debug("%s: %s\n", __func__, prop_name); 837 config_node = fdt_path_offset(blob, "/config"); 838 if (config_node < 0) 839 return default_val; 840 return fdtdec_get_int(blob, config_node, prop_name, default_val); 841 } 842 843 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 844 { 845 int config_node; 846 const void *prop; 847 848 debug("%s: %s\n", __func__, prop_name); 849 config_node = fdt_path_offset(blob, "/config"); 850 if (config_node < 0) 851 return 0; 852 prop = fdt_get_property(blob, config_node, prop_name, NULL); 853 854 return prop != NULL; 855 } 856 857 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 858 { 859 const char *nodep; 860 int nodeoffset; 861 int len; 862 863 debug("%s: %s\n", __func__, prop_name); 864 nodeoffset = fdt_path_offset(blob, "/config"); 865 if (nodeoffset < 0) 866 return NULL; 867 868 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 869 if (!nodep) 870 return NULL; 871 872 return (char *)nodep; 873 } 874 875 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 876 fdt_addr_t *basep, fdt_size_t *sizep) 877 { 878 const fdt_addr_t *cell; 879 int len; 880 881 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 882 prop_name); 883 cell = fdt_getprop(blob, node, prop_name, &len); 884 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 885 debug("cell=%p, len=%d\n", cell, len); 886 return -1; 887 } 888 889 *basep = fdt_addr_to_cpu(*cell); 890 *sizep = fdt_size_to_cpu(cell[1]); 891 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 892 (ulong)*sizep); 893 894 return 0; 895 } 896 897 /** 898 * Read a flash entry from the fdt 899 * 900 * @param blob FDT blob 901 * @param node Offset of node to read 902 * @param name Name of node being read 903 * @param entry Place to put offset and size of this node 904 * @return 0 if ok, -ve on error 905 */ 906 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 907 struct fmap_entry *entry) 908 { 909 const char *prop; 910 u32 reg[2]; 911 912 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 913 debug("Node '%s' has bad/missing 'reg' property\n", name); 914 return -FDT_ERR_NOTFOUND; 915 } 916 entry->offset = reg[0]; 917 entry->length = reg[1]; 918 entry->used = fdtdec_get_int(blob, node, "used", entry->length); 919 prop = fdt_getprop(blob, node, "compress", NULL); 920 entry->compress_algo = prop && !strcmp(prop, "lzo") ? 921 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; 922 prop = fdt_getprop(blob, node, "hash", &entry->hash_size); 923 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; 924 entry->hash = (uint8_t *)prop; 925 926 return 0; 927 } 928 929 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 930 { 931 u64 number = 0; 932 933 while (cells--) 934 number = (number << 32) | fdt32_to_cpu(*ptr++); 935 936 return number; 937 } 938 939 int fdt_get_resource(const void *fdt, int node, const char *property, 940 unsigned int index, struct fdt_resource *res) 941 { 942 const fdt32_t *ptr, *end; 943 int na, ns, len, parent; 944 unsigned int i = 0; 945 946 parent = fdt_parent_offset(fdt, node); 947 if (parent < 0) 948 return parent; 949 950 na = fdt_address_cells(fdt, parent); 951 ns = fdt_size_cells(fdt, parent); 952 953 ptr = fdt_getprop(fdt, node, property, &len); 954 if (!ptr) 955 return len; 956 957 end = ptr + len / sizeof(*ptr); 958 959 while (ptr + na + ns <= end) { 960 if (i == index) { 961 res->start = res->end = fdtdec_get_number(ptr, na); 962 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 963 return 0; 964 } 965 966 ptr += na + ns; 967 i++; 968 } 969 970 return -FDT_ERR_NOTFOUND; 971 } 972 973 int fdt_get_named_resource(const void *fdt, int node, const char *property, 974 const char *prop_names, const char *name, 975 struct fdt_resource *res) 976 { 977 int index; 978 979 index = fdt_find_string(fdt, node, prop_names, name); 980 if (index < 0) 981 return index; 982 983 return fdt_get_resource(fdt, node, property, index, res); 984 } 985 986 int fdtdec_decode_memory_region(const void *blob, int config_node, 987 const char *mem_type, const char *suffix, 988 fdt_addr_t *basep, fdt_size_t *sizep) 989 { 990 char prop_name[50]; 991 const char *mem; 992 fdt_size_t size, offset_size; 993 fdt_addr_t base, offset; 994 int node; 995 996 if (config_node == -1) { 997 config_node = fdt_path_offset(blob, "/config"); 998 if (config_node < 0) { 999 debug("%s: Cannot find /config node\n", __func__); 1000 return -ENOENT; 1001 } 1002 } 1003 if (!suffix) 1004 suffix = ""; 1005 1006 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 1007 suffix); 1008 mem = fdt_getprop(blob, config_node, prop_name, NULL); 1009 if (!mem) { 1010 debug("%s: No memory type for '%s', using /memory\n", __func__, 1011 prop_name); 1012 mem = "/memory"; 1013 } 1014 1015 node = fdt_path_offset(blob, mem); 1016 if (node < 0) { 1017 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 1018 fdt_strerror(node)); 1019 return -ENOENT; 1020 } 1021 1022 /* 1023 * Not strictly correct - the memory may have multiple banks. We just 1024 * use the first 1025 */ 1026 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 1027 debug("%s: Failed to decode memory region %s\n", __func__, 1028 mem); 1029 return -EINVAL; 1030 } 1031 1032 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 1033 suffix); 1034 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 1035 &offset_size)) { 1036 debug("%s: Failed to decode memory region '%s'\n", __func__, 1037 prop_name); 1038 return -EINVAL; 1039 } 1040 1041 *basep = base + offset; 1042 *sizep = offset_size; 1043 1044 return 0; 1045 } 1046 1047 static int decode_timing_property(const void *blob, int node, const char *name, 1048 struct timing_entry *result) 1049 { 1050 int length, ret = 0; 1051 const u32 *prop; 1052 1053 prop = fdt_getprop(blob, node, name, &length); 1054 if (!prop) { 1055 debug("%s: could not find property %s\n", 1056 fdt_get_name(blob, node, NULL), name); 1057 return length; 1058 } 1059 1060 if (length == sizeof(u32)) { 1061 result->typ = fdtdec_get_int(blob, node, name, 0); 1062 result->min = result->typ; 1063 result->max = result->typ; 1064 } else { 1065 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3); 1066 } 1067 1068 return ret; 1069 } 1070 1071 int fdtdec_decode_display_timing(const void *blob, int parent, int index, 1072 struct display_timing *dt) 1073 { 1074 int i, node, timings_node; 1075 u32 val = 0; 1076 int ret = 0; 1077 1078 timings_node = fdt_subnode_offset(blob, parent, "display-timings"); 1079 if (timings_node < 0) 1080 return timings_node; 1081 1082 for (i = 0, node = fdt_first_subnode(blob, timings_node); 1083 node > 0 && i != index; 1084 node = fdt_next_subnode(blob, node)) 1085 i++; 1086 1087 if (node < 0) 1088 return node; 1089 1090 memset(dt, 0, sizeof(*dt)); 1091 1092 ret |= decode_timing_property(blob, node, "hback-porch", 1093 &dt->hback_porch); 1094 ret |= decode_timing_property(blob, node, "hfront-porch", 1095 &dt->hfront_porch); 1096 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive); 1097 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len); 1098 ret |= decode_timing_property(blob, node, "vback-porch", 1099 &dt->vback_porch); 1100 ret |= decode_timing_property(blob, node, "vfront-porch", 1101 &dt->vfront_porch); 1102 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive); 1103 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len); 1104 ret |= decode_timing_property(blob, node, "clock-frequency", 1105 &dt->pixelclock); 1106 1107 dt->flags = 0; 1108 val = fdtdec_get_int(blob, node, "vsync-active", -1); 1109 if (val != -1) { 1110 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : 1111 DISPLAY_FLAGS_VSYNC_LOW; 1112 } 1113 val = fdtdec_get_int(blob, node, "hsync-active", -1); 1114 if (val != -1) { 1115 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : 1116 DISPLAY_FLAGS_HSYNC_LOW; 1117 } 1118 val = fdtdec_get_int(blob, node, "de-active", -1); 1119 if (val != -1) { 1120 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : 1121 DISPLAY_FLAGS_DE_LOW; 1122 } 1123 val = fdtdec_get_int(blob, node, "pixelclk-active", -1); 1124 if (val != -1) { 1125 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : 1126 DISPLAY_FLAGS_PIXDATA_NEGEDGE; 1127 } 1128 1129 if (fdtdec_get_bool(blob, node, "interlaced")) 1130 dt->flags |= DISPLAY_FLAGS_INTERLACED; 1131 if (fdtdec_get_bool(blob, node, "doublescan")) 1132 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; 1133 if (fdtdec_get_bool(blob, node, "doubleclk")) 1134 dt->flags |= DISPLAY_FLAGS_DOUBLECLK; 1135 1136 return 0; 1137 } 1138 1139 int fdtdec_setup(void) 1140 { 1141 #if CONFIG_IS_ENABLED(OF_CONTROL) 1142 # ifdef CONFIG_OF_EMBED 1143 /* Get a pointer to the FDT */ 1144 gd->fdt_blob = __dtb_dt_begin; 1145 # elif defined CONFIG_OF_SEPARATE 1146 # ifdef CONFIG_SPL_BUILD 1147 /* FDT is at end of BSS */ 1148 gd->fdt_blob = (ulong *)&__bss_end; 1149 # else 1150 /* FDT is at end of image */ 1151 gd->fdt_blob = (ulong *)&_end; 1152 # endif 1153 # elif defined(CONFIG_OF_HOSTFILE) 1154 if (sandbox_read_fdt_from_file()) { 1155 puts("Failed to read control FDT\n"); 1156 return -1; 1157 } 1158 # endif 1159 # ifndef CONFIG_SPL_BUILD 1160 /* Allow the early environment to override the fdt address */ 1161 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, 1162 (uintptr_t)gd->fdt_blob); 1163 # endif 1164 #endif 1165 return fdtdec_prepare_fdt(); 1166 } 1167 1168 #endif /* !USE_HOSTCC */ 1169