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