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 <dm.h> 9 #include <errno.h> 10 #include <serial.h> 11 #include <libfdt.h> 12 #include <fdtdec.h> 13 #include <asm/sections.h> 14 #include <linux/ctype.h> 15 16 DECLARE_GLOBAL_DATA_PTR; 17 18 /* 19 * Here are the type we know about. One day we might allow drivers to 20 * register. For now we just put them here. The COMPAT macro allows us to 21 * turn this into a sparse list later, and keeps the ID with the name. 22 */ 23 #define COMPAT(id, name) name 24 static const char * const compat_names[COMPAT_COUNT] = { 25 COMPAT(UNKNOWN, "<none>"), 26 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"), 27 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"), 28 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"), 29 COMPAT(NVIDIA_TEGRA124_PMC, "nvidia,tegra124-pmc"), 30 COMPAT(NVIDIA_TEGRA186_SDMMC, "nvidia,tegra186-sdhci"), 31 COMPAT(NVIDIA_TEGRA210_SDMMC, "nvidia,tegra210-sdhci"), 32 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"), 33 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"), 34 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"), 35 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"), 36 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"), 37 COMPAT(SMSC_LAN9215, "smsc,lan9215"), 38 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), 39 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), 40 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), 41 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), 42 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"), 43 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), 44 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"), 45 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), 46 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"), 47 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"), 48 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"), 49 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), 50 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), 51 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"), 52 COMPAT(GENERIC_SPI_FLASH, "spi-flash"), 53 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), 54 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), 55 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), 56 COMPAT(INTEL_MICROCODE, "intel,microcode"), 57 COMPAT(AMS_AS3722, "ams,as3722"), 58 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"), 59 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"), 60 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"), 61 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"), 62 COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"), 63 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"), 64 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"), 65 COMPAT(COMPAT_INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"), 66 }; 67 68 const char *fdtdec_get_compatible(enum fdt_compat_id id) 69 { 70 /* We allow reading of the 'unknown' ID for testing purposes */ 71 assert(id >= 0 && id < COMPAT_COUNT); 72 return compat_names[id]; 73 } 74 75 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node, 76 const char *prop_name, int index, int na, int ns, 77 fdt_size_t *sizep) 78 { 79 const fdt32_t *prop, *prop_end; 80 const fdt32_t *prop_addr, *prop_size, *prop_after_size; 81 int len; 82 fdt_addr_t addr; 83 84 debug("%s: %s: ", __func__, prop_name); 85 86 if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) { 87 debug("(na too large for fdt_addr_t type)\n"); 88 return FDT_ADDR_T_NONE; 89 } 90 91 if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) { 92 debug("(ns too large for fdt_size_t type)\n"); 93 return FDT_ADDR_T_NONE; 94 } 95 96 prop = fdt_getprop(blob, node, prop_name, &len); 97 if (!prop) { 98 debug("(not found)\n"); 99 return FDT_ADDR_T_NONE; 100 } 101 prop_end = prop + (len / sizeof(*prop)); 102 103 prop_addr = prop + (index * (na + ns)); 104 prop_size = prop_addr + na; 105 prop_after_size = prop_size + ns; 106 if (prop_after_size > prop_end) { 107 debug("(not enough data: expected >= %d cells, got %d cells)\n", 108 (u32)(prop_after_size - prop), ((u32)(prop_end - prop))); 109 return FDT_ADDR_T_NONE; 110 } 111 112 addr = fdtdec_get_number(prop_addr, na); 113 114 if (sizep) { 115 *sizep = fdtdec_get_number(prop_size, ns); 116 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr, 117 (unsigned long long)*sizep); 118 } else { 119 debug("addr=%08llx\n", (unsigned long long)addr); 120 } 121 122 return addr; 123 } 124 125 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent, 126 int node, const char *prop_name, int index, fdt_size_t *sizep) 127 { 128 int na, ns; 129 130 debug("%s: ", __func__); 131 132 na = fdt_address_cells(blob, parent); 133 if (na < 1) { 134 debug("(bad #address-cells)\n"); 135 return FDT_ADDR_T_NONE; 136 } 137 138 ns = fdt_size_cells(blob, parent); 139 if (ns < 0) { 140 debug("(bad #size-cells)\n"); 141 return FDT_ADDR_T_NONE; 142 } 143 144 debug("na=%d, ns=%d, ", na, ns); 145 146 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na, 147 ns, sizep); 148 } 149 150 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node, 151 const char *prop_name, int index, fdt_size_t *sizep) 152 { 153 int parent; 154 155 debug("%s: ", __func__); 156 157 parent = fdt_parent_offset(blob, node); 158 if (parent < 0) { 159 debug("(no parent found)\n"); 160 return FDT_ADDR_T_NONE; 161 } 162 163 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name, 164 index, sizep); 165 } 166 167 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 168 const char *prop_name, fdt_size_t *sizep) 169 { 170 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0; 171 172 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0, 173 sizeof(fdt_addr_t) / sizeof(fdt32_t), 174 ns, sizep); 175 } 176 177 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 178 const char *prop_name) 179 { 180 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 181 } 182 183 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI) 184 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 185 const char *prop_name, struct fdt_pci_addr *addr) 186 { 187 const u32 *cell; 188 int len; 189 int ret = -ENOENT; 190 191 debug("%s: %s: ", __func__, prop_name); 192 193 /* 194 * If we follow the pci bus bindings strictly, we should check 195 * the value of the node's parent node's #address-cells and 196 * #size-cells. They need to be 3 and 2 accordingly. However, 197 * for simplicity we skip the check here. 198 */ 199 cell = fdt_getprop(blob, node, prop_name, &len); 200 if (!cell) 201 goto fail; 202 203 if ((len % FDT_PCI_REG_SIZE) == 0) { 204 int num = len / FDT_PCI_REG_SIZE; 205 int i; 206 207 for (i = 0; i < num; i++) { 208 debug("pci address #%d: %08lx %08lx %08lx\n", i, 209 (ulong)fdt32_to_cpu(cell[0]), 210 (ulong)fdt32_to_cpu(cell[1]), 211 (ulong)fdt32_to_cpu(cell[2])); 212 if ((fdt32_to_cpu(*cell) & type) == type) { 213 addr->phys_hi = fdt32_to_cpu(cell[0]); 214 addr->phys_mid = fdt32_to_cpu(cell[1]); 215 addr->phys_lo = fdt32_to_cpu(cell[1]); 216 break; 217 } else { 218 cell += (FDT_PCI_ADDR_CELLS + 219 FDT_PCI_SIZE_CELLS); 220 } 221 } 222 223 if (i == num) { 224 ret = -ENXIO; 225 goto fail; 226 } 227 228 return 0; 229 } else { 230 ret = -EINVAL; 231 } 232 233 fail: 234 debug("(not found)\n"); 235 return ret; 236 } 237 238 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 239 { 240 const char *list, *end; 241 int len; 242 243 list = fdt_getprop(blob, node, "compatible", &len); 244 if (!list) 245 return -ENOENT; 246 247 end = list + len; 248 while (list < end) { 249 char *s; 250 251 len = strlen(list); 252 if (len >= strlen("pciVVVV,DDDD")) { 253 s = strstr(list, "pci"); 254 255 /* 256 * check if the string is something like pciVVVV,DDDD.RR 257 * or just pciVVVV,DDDD 258 */ 259 if (s && s[7] == ',' && 260 (s[12] == '.' || s[12] == 0)) { 261 s += 3; 262 *vendor = simple_strtol(s, NULL, 16); 263 264 s += 5; 265 *device = simple_strtol(s, NULL, 16); 266 267 return 0; 268 } 269 } 270 list += (len + 1); 271 } 272 273 return -ENOENT; 274 } 275 276 int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr, 277 u32 *bar) 278 { 279 int barnum; 280 281 /* extract the bar number from fdt_pci_addr */ 282 barnum = addr->phys_hi & 0xff; 283 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) 284 return -EINVAL; 285 286 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; 287 *bar = dm_pci_read_bar32(dev, barnum); 288 289 return 0; 290 } 291 #endif 292 293 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 294 uint64_t default_val) 295 { 296 const uint64_t *cell64; 297 int length; 298 299 cell64 = fdt_getprop(blob, node, prop_name, &length); 300 if (!cell64 || length < sizeof(*cell64)) 301 return default_val; 302 303 return fdt64_to_cpu(*cell64); 304 } 305 306 int fdtdec_get_is_enabled(const void *blob, int node) 307 { 308 const char *cell; 309 310 /* 311 * It should say "okay", so only allow that. Some fdts use "ok" but 312 * this is a bug. Please fix your device tree source file. See here 313 * for discussion: 314 * 315 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 316 */ 317 cell = fdt_getprop(blob, node, "status", NULL); 318 if (cell) 319 return 0 == strcmp(cell, "okay"); 320 return 1; 321 } 322 323 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 324 { 325 enum fdt_compat_id id; 326 327 /* Search our drivers */ 328 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 329 if (0 == fdt_node_check_compatible(blob, node, 330 compat_names[id])) 331 return id; 332 return COMPAT_UNKNOWN; 333 } 334 335 int fdtdec_next_compatible(const void *blob, int node, 336 enum fdt_compat_id id) 337 { 338 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 339 } 340 341 int fdtdec_next_compatible_subnode(const void *blob, int node, 342 enum fdt_compat_id id, int *depthp) 343 { 344 do { 345 node = fdt_next_node(blob, node, depthp); 346 } while (*depthp > 1); 347 348 /* If this is a direct subnode, and compatible, return it */ 349 if (*depthp == 1 && 0 == fdt_node_check_compatible( 350 blob, node, compat_names[id])) 351 return node; 352 353 return -FDT_ERR_NOTFOUND; 354 } 355 356 int fdtdec_next_alias(const void *blob, const char *name, 357 enum fdt_compat_id id, int *upto) 358 { 359 #define MAX_STR_LEN 20 360 char str[MAX_STR_LEN + 20]; 361 int node, err; 362 363 /* snprintf() is not available */ 364 assert(strlen(name) < MAX_STR_LEN); 365 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 366 node = fdt_path_offset(blob, str); 367 if (node < 0) 368 return node; 369 err = fdt_node_check_compatible(blob, node, compat_names[id]); 370 if (err < 0) 371 return err; 372 if (err) 373 return -FDT_ERR_NOTFOUND; 374 (*upto)++; 375 return node; 376 } 377 378 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 379 enum fdt_compat_id id, int *node_list, int maxcount) 380 { 381 memset(node_list, '\0', sizeof(*node_list) * maxcount); 382 383 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 384 } 385 386 /* TODO: Can we tighten this code up a little? */ 387 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 388 enum fdt_compat_id id, int *node_list, int maxcount) 389 { 390 int name_len = strlen(name); 391 int nodes[maxcount]; 392 int num_found = 0; 393 int offset, node; 394 int alias_node; 395 int count; 396 int i, j; 397 398 /* find the alias node if present */ 399 alias_node = fdt_path_offset(blob, "/aliases"); 400 401 /* 402 * start with nothing, and we can assume that the root node can't 403 * match 404 */ 405 memset(nodes, '\0', sizeof(nodes)); 406 407 /* First find all the compatible nodes */ 408 for (node = count = 0; node >= 0 && count < maxcount;) { 409 node = fdtdec_next_compatible(blob, node, id); 410 if (node >= 0) 411 nodes[count++] = node; 412 } 413 if (node >= 0) 414 debug("%s: warning: maxcount exceeded with alias '%s'\n", 415 __func__, name); 416 417 /* Now find all the aliases */ 418 for (offset = fdt_first_property_offset(blob, alias_node); 419 offset > 0; 420 offset = fdt_next_property_offset(blob, offset)) { 421 const struct fdt_property *prop; 422 const char *path; 423 int number; 424 int found; 425 426 node = 0; 427 prop = fdt_get_property_by_offset(blob, offset, NULL); 428 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 429 if (prop->len && 0 == strncmp(path, name, name_len)) 430 node = fdt_path_offset(blob, prop->data); 431 if (node <= 0) 432 continue; 433 434 /* Get the alias number */ 435 number = simple_strtoul(path + name_len, NULL, 10); 436 if (number < 0 || number >= maxcount) { 437 debug("%s: warning: alias '%s' is out of range\n", 438 __func__, path); 439 continue; 440 } 441 442 /* Make sure the node we found is actually in our list! */ 443 found = -1; 444 for (j = 0; j < count; j++) 445 if (nodes[j] == node) { 446 found = j; 447 break; 448 } 449 450 if (found == -1) { 451 debug("%s: warning: alias '%s' points to a node " 452 "'%s' that is missing or is not compatible " 453 " with '%s'\n", __func__, path, 454 fdt_get_name(blob, node, NULL), 455 compat_names[id]); 456 continue; 457 } 458 459 /* 460 * Add this node to our list in the right place, and mark 461 * it as done. 462 */ 463 if (fdtdec_get_is_enabled(blob, node)) { 464 if (node_list[number]) { 465 debug("%s: warning: alias '%s' requires that " 466 "a node be placed in the list in a " 467 "position which is already filled by " 468 "node '%s'\n", __func__, path, 469 fdt_get_name(blob, node, NULL)); 470 continue; 471 } 472 node_list[number] = node; 473 if (number >= num_found) 474 num_found = number + 1; 475 } 476 nodes[found] = 0; 477 } 478 479 /* Add any nodes not mentioned by an alias */ 480 for (i = j = 0; i < maxcount; i++) { 481 if (!node_list[i]) { 482 for (; j < maxcount; j++) 483 if (nodes[j] && 484 fdtdec_get_is_enabled(blob, nodes[j])) 485 break; 486 487 /* Have we run out of nodes to add? */ 488 if (j == maxcount) 489 break; 490 491 assert(!node_list[i]); 492 node_list[i] = nodes[j++]; 493 if (i >= num_found) 494 num_found = i + 1; 495 } 496 } 497 498 return num_found; 499 } 500 501 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 502 int *seqp) 503 { 504 int base_len = strlen(base); 505 const char *find_name; 506 int find_namelen; 507 int prop_offset; 508 int aliases; 509 510 find_name = fdt_get_name(blob, offset, &find_namelen); 511 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 512 513 aliases = fdt_path_offset(blob, "/aliases"); 514 for (prop_offset = fdt_first_property_offset(blob, aliases); 515 prop_offset > 0; 516 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 517 const char *prop; 518 const char *name; 519 const char *slash; 520 int len, val; 521 522 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 523 debug(" - %s, %s\n", name, prop); 524 if (len < find_namelen || *prop != '/' || prop[len - 1] || 525 strncmp(name, base, base_len)) 526 continue; 527 528 slash = strrchr(prop, '/'); 529 if (strcmp(slash + 1, find_name)) 530 continue; 531 val = trailing_strtol(name); 532 if (val != -1) { 533 *seqp = val; 534 debug("Found seq %d\n", *seqp); 535 return 0; 536 } 537 } 538 539 debug("Not found\n"); 540 return -ENOENT; 541 } 542 543 const char *fdtdec_get_chosen_prop(const void *blob, const char *name) 544 { 545 int chosen_node; 546 547 if (!blob) 548 return NULL; 549 chosen_node = fdt_path_offset(blob, "/chosen"); 550 return fdt_getprop(blob, chosen_node, name, NULL); 551 } 552 553 int fdtdec_get_chosen_node(const void *blob, const char *name) 554 { 555 const char *prop; 556 557 prop = fdtdec_get_chosen_prop(blob, name); 558 if (!prop) 559 return -FDT_ERR_NOTFOUND; 560 return fdt_path_offset(blob, prop); 561 } 562 563 int fdtdec_check_fdt(void) 564 { 565 /* 566 * We must have an FDT, but we cannot panic() yet since the console 567 * is not ready. So for now, just assert(). Boards which need an early 568 * FDT (prior to console ready) will need to make their own 569 * arrangements and do their own checks. 570 */ 571 assert(!fdtdec_prepare_fdt()); 572 return 0; 573 } 574 575 /* 576 * This function is a little odd in that it accesses global data. At some 577 * point if the architecture board.c files merge this will make more sense. 578 * Even now, it is common code. 579 */ 580 int fdtdec_prepare_fdt(void) 581 { 582 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 583 fdt_check_header(gd->fdt_blob)) { 584 #ifdef CONFIG_SPL_BUILD 585 puts("Missing DTB\n"); 586 #else 587 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"); 588 # ifdef DEBUG 589 if (gd->fdt_blob) { 590 printf("fdt_blob=%p\n", gd->fdt_blob); 591 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4, 592 32, 0); 593 } 594 # endif 595 #endif 596 return -1; 597 } 598 return 0; 599 } 600 601 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 602 { 603 const u32 *phandle; 604 int lookup; 605 606 debug("%s: %s\n", __func__, prop_name); 607 phandle = fdt_getprop(blob, node, prop_name, NULL); 608 if (!phandle) 609 return -FDT_ERR_NOTFOUND; 610 611 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 612 return lookup; 613 } 614 615 /** 616 * Look up a property in a node and check that it has a minimum length. 617 * 618 * @param blob FDT blob 619 * @param node node to examine 620 * @param prop_name name of property to find 621 * @param min_len minimum property length in bytes 622 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 623 found, or -FDT_ERR_BADLAYOUT if not enough data 624 * @return pointer to cell, which is only valid if err == 0 625 */ 626 static const void *get_prop_check_min_len(const void *blob, int node, 627 const char *prop_name, int min_len, int *err) 628 { 629 const void *cell; 630 int len; 631 632 debug("%s: %s\n", __func__, prop_name); 633 cell = fdt_getprop(blob, node, prop_name, &len); 634 if (!cell) 635 *err = -FDT_ERR_NOTFOUND; 636 else if (len < min_len) 637 *err = -FDT_ERR_BADLAYOUT; 638 else 639 *err = 0; 640 return cell; 641 } 642 643 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 644 u32 *array, int count) 645 { 646 const u32 *cell; 647 int i, err = 0; 648 649 debug("%s: %s\n", __func__, prop_name); 650 cell = get_prop_check_min_len(blob, node, prop_name, 651 sizeof(u32) * count, &err); 652 if (!err) { 653 for (i = 0; i < count; i++) 654 array[i] = fdt32_to_cpu(cell[i]); 655 } 656 return err; 657 } 658 659 int fdtdec_get_int_array_count(const void *blob, int node, 660 const char *prop_name, u32 *array, int count) 661 { 662 const u32 *cell; 663 int len, elems; 664 int i; 665 666 debug("%s: %s\n", __func__, prop_name); 667 cell = fdt_getprop(blob, node, prop_name, &len); 668 if (!cell) 669 return -FDT_ERR_NOTFOUND; 670 elems = len / sizeof(u32); 671 if (count > elems) 672 count = elems; 673 for (i = 0; i < count; i++) 674 array[i] = fdt32_to_cpu(cell[i]); 675 676 return count; 677 } 678 679 const u32 *fdtdec_locate_array(const void *blob, int node, 680 const char *prop_name, int count) 681 { 682 const u32 *cell; 683 int err; 684 685 cell = get_prop_check_min_len(blob, node, prop_name, 686 sizeof(u32) * count, &err); 687 return err ? NULL : cell; 688 } 689 690 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 691 { 692 const s32 *cell; 693 int len; 694 695 debug("%s: %s\n", __func__, prop_name); 696 cell = fdt_getprop(blob, node, prop_name, &len); 697 return cell != NULL; 698 } 699 700 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 701 const char *list_name, 702 const char *cells_name, 703 int cell_count, int index, 704 struct fdtdec_phandle_args *out_args) 705 { 706 const __be32 *list, *list_end; 707 int rc = 0, size, cur_index = 0; 708 uint32_t count = 0; 709 int node = -1; 710 int phandle; 711 712 /* Retrieve the phandle list property */ 713 list = fdt_getprop(blob, src_node, list_name, &size); 714 if (!list) 715 return -ENOENT; 716 list_end = list + size / sizeof(*list); 717 718 /* Loop over the phandles until all the requested entry is found */ 719 while (list < list_end) { 720 rc = -EINVAL; 721 count = 0; 722 723 /* 724 * If phandle is 0, then it is an empty entry with no 725 * arguments. Skip forward to the next entry. 726 */ 727 phandle = be32_to_cpup(list++); 728 if (phandle) { 729 /* 730 * Find the provider node and parse the #*-cells 731 * property to determine the argument length. 732 * 733 * This is not needed if the cell count is hard-coded 734 * (i.e. cells_name not set, but cell_count is set), 735 * except when we're going to return the found node 736 * below. 737 */ 738 if (cells_name || cur_index == index) { 739 node = fdt_node_offset_by_phandle(blob, 740 phandle); 741 if (!node) { 742 debug("%s: could not find phandle\n", 743 fdt_get_name(blob, src_node, 744 NULL)); 745 goto err; 746 } 747 } 748 749 if (cells_name) { 750 count = fdtdec_get_int(blob, node, cells_name, 751 -1); 752 if (count == -1) { 753 debug("%s: could not get %s for %s\n", 754 fdt_get_name(blob, src_node, 755 NULL), 756 cells_name, 757 fdt_get_name(blob, node, 758 NULL)); 759 goto err; 760 } 761 } else { 762 count = cell_count; 763 } 764 765 /* 766 * Make sure that the arguments actually fit in the 767 * remaining property data length 768 */ 769 if (list + count > list_end) { 770 debug("%s: arguments longer than property\n", 771 fdt_get_name(blob, src_node, NULL)); 772 goto err; 773 } 774 } 775 776 /* 777 * All of the error cases above bail out of the loop, so at 778 * this point, the parsing is successful. If the requested 779 * index matches, then fill the out_args structure and return, 780 * or return -ENOENT for an empty entry. 781 */ 782 rc = -ENOENT; 783 if (cur_index == index) { 784 if (!phandle) 785 goto err; 786 787 if (out_args) { 788 int i; 789 790 if (count > MAX_PHANDLE_ARGS) { 791 debug("%s: too many arguments %d\n", 792 fdt_get_name(blob, src_node, 793 NULL), count); 794 count = MAX_PHANDLE_ARGS; 795 } 796 out_args->node = node; 797 out_args->args_count = count; 798 for (i = 0; i < count; i++) { 799 out_args->args[i] = 800 be32_to_cpup(list++); 801 } 802 } 803 804 /* Found it! return success */ 805 return 0; 806 } 807 808 node = -1; 809 list += count; 810 cur_index++; 811 } 812 813 /* 814 * Result will be one of: 815 * -ENOENT : index is for empty phandle 816 * -EINVAL : parsing error on data 817 * [1..n] : Number of phandle (count mode; when index = -1) 818 */ 819 rc = index < 0 ? cur_index : -ENOENT; 820 err: 821 return rc; 822 } 823 824 int fdtdec_get_child_count(const void *blob, int node) 825 { 826 int subnode; 827 int num = 0; 828 829 fdt_for_each_subnode(blob, subnode, node) 830 num++; 831 832 return num; 833 } 834 835 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 836 u8 *array, int count) 837 { 838 const u8 *cell; 839 int err; 840 841 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 842 if (!err) 843 memcpy(array, cell, count); 844 return err; 845 } 846 847 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 848 const char *prop_name, int count) 849 { 850 const u8 *cell; 851 int err; 852 853 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 854 if (err) 855 return NULL; 856 return cell; 857 } 858 859 int fdtdec_get_config_int(const void *blob, const char *prop_name, 860 int default_val) 861 { 862 int config_node; 863 864 debug("%s: %s\n", __func__, prop_name); 865 config_node = fdt_path_offset(blob, "/config"); 866 if (config_node < 0) 867 return default_val; 868 return fdtdec_get_int(blob, config_node, prop_name, default_val); 869 } 870 871 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 872 { 873 int config_node; 874 const void *prop; 875 876 debug("%s: %s\n", __func__, prop_name); 877 config_node = fdt_path_offset(blob, "/config"); 878 if (config_node < 0) 879 return 0; 880 prop = fdt_get_property(blob, config_node, prop_name, NULL); 881 882 return prop != NULL; 883 } 884 885 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 886 { 887 const char *nodep; 888 int nodeoffset; 889 int len; 890 891 debug("%s: %s\n", __func__, prop_name); 892 nodeoffset = fdt_path_offset(blob, "/config"); 893 if (nodeoffset < 0) 894 return NULL; 895 896 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 897 if (!nodep) 898 return NULL; 899 900 return (char *)nodep; 901 } 902 903 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 904 fdt_addr_t *basep, fdt_size_t *sizep) 905 { 906 const fdt_addr_t *cell; 907 int len; 908 909 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 910 prop_name); 911 cell = fdt_getprop(blob, node, prop_name, &len); 912 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 913 debug("cell=%p, len=%d\n", cell, len); 914 return -1; 915 } 916 917 *basep = fdt_addr_to_cpu(*cell); 918 *sizep = fdt_size_to_cpu(cell[1]); 919 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 920 (ulong)*sizep); 921 922 return 0; 923 } 924 925 /** 926 * Read a flash entry from the fdt 927 * 928 * @param blob FDT blob 929 * @param node Offset of node to read 930 * @param name Name of node being read 931 * @param entry Place to put offset and size of this node 932 * @return 0 if ok, -ve on error 933 */ 934 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 935 struct fmap_entry *entry) 936 { 937 const char *prop; 938 u32 reg[2]; 939 940 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 941 debug("Node '%s' has bad/missing 'reg' property\n", name); 942 return -FDT_ERR_NOTFOUND; 943 } 944 entry->offset = reg[0]; 945 entry->length = reg[1]; 946 entry->used = fdtdec_get_int(blob, node, "used", entry->length); 947 prop = fdt_getprop(blob, node, "compress", NULL); 948 entry->compress_algo = prop && !strcmp(prop, "lzo") ? 949 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; 950 prop = fdt_getprop(blob, node, "hash", &entry->hash_size); 951 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; 952 entry->hash = (uint8_t *)prop; 953 954 return 0; 955 } 956 957 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 958 { 959 u64 number = 0; 960 961 while (cells--) 962 number = (number << 32) | fdt32_to_cpu(*ptr++); 963 964 return number; 965 } 966 967 int fdt_get_resource(const void *fdt, int node, const char *property, 968 unsigned int index, struct fdt_resource *res) 969 { 970 const fdt32_t *ptr, *end; 971 int na, ns, len, parent; 972 unsigned int i = 0; 973 974 parent = fdt_parent_offset(fdt, node); 975 if (parent < 0) 976 return parent; 977 978 na = fdt_address_cells(fdt, parent); 979 ns = fdt_size_cells(fdt, parent); 980 981 ptr = fdt_getprop(fdt, node, property, &len); 982 if (!ptr) 983 return len; 984 985 end = ptr + len / sizeof(*ptr); 986 987 while (ptr + na + ns <= end) { 988 if (i == index) { 989 res->start = res->end = fdtdec_get_number(ptr, na); 990 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 991 return 0; 992 } 993 994 ptr += na + ns; 995 i++; 996 } 997 998 return -FDT_ERR_NOTFOUND; 999 } 1000 1001 int fdt_get_named_resource(const void *fdt, int node, const char *property, 1002 const char *prop_names, const char *name, 1003 struct fdt_resource *res) 1004 { 1005 int index; 1006 1007 index = fdt_find_string(fdt, node, prop_names, name); 1008 if (index < 0) 1009 return index; 1010 1011 return fdt_get_resource(fdt, node, property, index, res); 1012 } 1013 1014 int fdtdec_decode_memory_region(const void *blob, int config_node, 1015 const char *mem_type, const char *suffix, 1016 fdt_addr_t *basep, fdt_size_t *sizep) 1017 { 1018 char prop_name[50]; 1019 const char *mem; 1020 fdt_size_t size, offset_size; 1021 fdt_addr_t base, offset; 1022 int node; 1023 1024 if (config_node == -1) { 1025 config_node = fdt_path_offset(blob, "/config"); 1026 if (config_node < 0) { 1027 debug("%s: Cannot find /config node\n", __func__); 1028 return -ENOENT; 1029 } 1030 } 1031 if (!suffix) 1032 suffix = ""; 1033 1034 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 1035 suffix); 1036 mem = fdt_getprop(blob, config_node, prop_name, NULL); 1037 if (!mem) { 1038 debug("%s: No memory type for '%s', using /memory\n", __func__, 1039 prop_name); 1040 mem = "/memory"; 1041 } 1042 1043 node = fdt_path_offset(blob, mem); 1044 if (node < 0) { 1045 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 1046 fdt_strerror(node)); 1047 return -ENOENT; 1048 } 1049 1050 /* 1051 * Not strictly correct - the memory may have multiple banks. We just 1052 * use the first 1053 */ 1054 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 1055 debug("%s: Failed to decode memory region %s\n", __func__, 1056 mem); 1057 return -EINVAL; 1058 } 1059 1060 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 1061 suffix); 1062 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 1063 &offset_size)) { 1064 debug("%s: Failed to decode memory region '%s'\n", __func__, 1065 prop_name); 1066 return -EINVAL; 1067 } 1068 1069 *basep = base + offset; 1070 *sizep = offset_size; 1071 1072 return 0; 1073 } 1074 1075 static int decode_timing_property(const void *blob, int node, const char *name, 1076 struct timing_entry *result) 1077 { 1078 int length, ret = 0; 1079 const u32 *prop; 1080 1081 prop = fdt_getprop(blob, node, name, &length); 1082 if (!prop) { 1083 debug("%s: could not find property %s\n", 1084 fdt_get_name(blob, node, NULL), name); 1085 return length; 1086 } 1087 1088 if (length == sizeof(u32)) { 1089 result->typ = fdtdec_get_int(blob, node, name, 0); 1090 result->min = result->typ; 1091 result->max = result->typ; 1092 } else { 1093 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3); 1094 } 1095 1096 return ret; 1097 } 1098 1099 int fdtdec_decode_display_timing(const void *blob, int parent, int index, 1100 struct display_timing *dt) 1101 { 1102 int i, node, timings_node; 1103 u32 val = 0; 1104 int ret = 0; 1105 1106 timings_node = fdt_subnode_offset(blob, parent, "display-timings"); 1107 if (timings_node < 0) 1108 return timings_node; 1109 1110 for (i = 0, node = fdt_first_subnode(blob, timings_node); 1111 node > 0 && i != index; 1112 node = fdt_next_subnode(blob, node)) 1113 i++; 1114 1115 if (node < 0) 1116 return node; 1117 1118 memset(dt, 0, sizeof(*dt)); 1119 1120 ret |= decode_timing_property(blob, node, "hback-porch", 1121 &dt->hback_porch); 1122 ret |= decode_timing_property(blob, node, "hfront-porch", 1123 &dt->hfront_porch); 1124 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive); 1125 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len); 1126 ret |= decode_timing_property(blob, node, "vback-porch", 1127 &dt->vback_porch); 1128 ret |= decode_timing_property(blob, node, "vfront-porch", 1129 &dt->vfront_porch); 1130 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive); 1131 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len); 1132 ret |= decode_timing_property(blob, node, "clock-frequency", 1133 &dt->pixelclock); 1134 1135 dt->flags = 0; 1136 val = fdtdec_get_int(blob, node, "vsync-active", -1); 1137 if (val != -1) { 1138 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : 1139 DISPLAY_FLAGS_VSYNC_LOW; 1140 } 1141 val = fdtdec_get_int(blob, node, "hsync-active", -1); 1142 if (val != -1) { 1143 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : 1144 DISPLAY_FLAGS_HSYNC_LOW; 1145 } 1146 val = fdtdec_get_int(blob, node, "de-active", -1); 1147 if (val != -1) { 1148 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : 1149 DISPLAY_FLAGS_DE_LOW; 1150 } 1151 val = fdtdec_get_int(blob, node, "pixelclk-active", -1); 1152 if (val != -1) { 1153 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : 1154 DISPLAY_FLAGS_PIXDATA_NEGEDGE; 1155 } 1156 1157 if (fdtdec_get_bool(blob, node, "interlaced")) 1158 dt->flags |= DISPLAY_FLAGS_INTERLACED; 1159 if (fdtdec_get_bool(blob, node, "doublescan")) 1160 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; 1161 if (fdtdec_get_bool(blob, node, "doubleclk")) 1162 dt->flags |= DISPLAY_FLAGS_DOUBLECLK; 1163 1164 return ret; 1165 } 1166 1167 int fdtdec_setup(void) 1168 { 1169 #if CONFIG_IS_ENABLED(OF_CONTROL) 1170 # ifdef CONFIG_OF_EMBED 1171 /* Get a pointer to the FDT */ 1172 gd->fdt_blob = __dtb_dt_begin; 1173 # elif defined CONFIG_OF_SEPARATE 1174 # ifdef CONFIG_SPL_BUILD 1175 /* FDT is at end of BSS unless it is in a different memory region */ 1176 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS)) 1177 gd->fdt_blob = (ulong *)&_image_binary_end; 1178 else 1179 gd->fdt_blob = (ulong *)&__bss_end; 1180 # else 1181 /* FDT is at end of image */ 1182 gd->fdt_blob = (ulong *)&_end; 1183 # endif 1184 # elif defined(CONFIG_OF_HOSTFILE) 1185 if (sandbox_read_fdt_from_file()) { 1186 puts("Failed to read control FDT\n"); 1187 return -1; 1188 } 1189 # endif 1190 # ifndef CONFIG_SPL_BUILD 1191 /* Allow the early environment to override the fdt address */ 1192 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, 1193 (uintptr_t)gd->fdt_blob); 1194 # endif 1195 #endif 1196 return fdtdec_prepare_fdt(); 1197 } 1198 1199 #endif /* !USE_HOSTCC */ 1200