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(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"), 58 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"), 59 COMPAT(INTEL_GMA, "intel,gma"), 60 COMPAT(AMS_AS3722, "ams,as3722"), 61 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"), 62 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"), 63 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"), 64 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"), 65 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"), 66 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"), 67 COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"), 68 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"), 69 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"), 70 COMPAT(COMPAT_INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"), 71 }; 72 73 const char *fdtdec_get_compatible(enum fdt_compat_id id) 74 { 75 /* We allow reading of the 'unknown' ID for testing purposes */ 76 assert(id >= 0 && id < COMPAT_COUNT); 77 return compat_names[id]; 78 } 79 80 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node, 81 const char *prop_name, int index, int na, int ns, 82 fdt_size_t *sizep) 83 { 84 const fdt32_t *prop, *prop_end; 85 const fdt32_t *prop_addr, *prop_size, *prop_after_size; 86 int len; 87 fdt_addr_t addr; 88 89 debug("%s: %s: ", __func__, prop_name); 90 91 if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) { 92 debug("(na too large for fdt_addr_t type)\n"); 93 return FDT_ADDR_T_NONE; 94 } 95 96 if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) { 97 debug("(ns too large for fdt_size_t type)\n"); 98 return FDT_ADDR_T_NONE; 99 } 100 101 prop = fdt_getprop(blob, node, prop_name, &len); 102 if (!prop) { 103 debug("(not found)\n"); 104 return FDT_ADDR_T_NONE; 105 } 106 prop_end = prop + (len / sizeof(*prop)); 107 108 prop_addr = prop + (index * (na + ns)); 109 prop_size = prop_addr + na; 110 prop_after_size = prop_size + ns; 111 if (prop_after_size > prop_end) { 112 debug("(not enough data: expected >= %d cells, got %d cells)\n", 113 (u32)(prop_after_size - prop), ((u32)(prop_end - prop))); 114 return FDT_ADDR_T_NONE; 115 } 116 117 addr = fdtdec_get_number(prop_addr, na); 118 119 if (sizep) { 120 *sizep = fdtdec_get_number(prop_size, ns); 121 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr, 122 (unsigned long long)*sizep); 123 } else { 124 debug("addr=%08llx\n", (unsigned long long)addr); 125 } 126 127 return addr; 128 } 129 130 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent, 131 int node, const char *prop_name, int index, fdt_size_t *sizep) 132 { 133 int na, ns; 134 135 debug("%s: ", __func__); 136 137 na = fdt_address_cells(blob, parent); 138 if (na < 1) { 139 debug("(bad #address-cells)\n"); 140 return FDT_ADDR_T_NONE; 141 } 142 143 ns = fdt_size_cells(blob, parent); 144 if (ns < 0) { 145 debug("(bad #size-cells)\n"); 146 return FDT_ADDR_T_NONE; 147 } 148 149 debug("na=%d, ns=%d, ", na, ns); 150 151 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na, 152 ns, sizep); 153 } 154 155 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node, 156 const char *prop_name, int index, fdt_size_t *sizep) 157 { 158 int parent; 159 160 debug("%s: ", __func__); 161 162 parent = fdt_parent_offset(blob, node); 163 if (parent < 0) { 164 debug("(no parent found)\n"); 165 return FDT_ADDR_T_NONE; 166 } 167 168 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name, 169 index, sizep); 170 } 171 172 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 173 const char *prop_name, fdt_size_t *sizep) 174 { 175 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0; 176 177 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0, 178 sizeof(fdt_addr_t) / sizeof(fdt32_t), 179 ns, sizep); 180 } 181 182 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 183 const char *prop_name) 184 { 185 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 186 } 187 188 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI) 189 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 190 const char *prop_name, struct fdt_pci_addr *addr) 191 { 192 const u32 *cell; 193 int len; 194 int ret = -ENOENT; 195 196 debug("%s: %s: ", __func__, prop_name); 197 198 /* 199 * If we follow the pci bus bindings strictly, we should check 200 * the value of the node's parent node's #address-cells and 201 * #size-cells. They need to be 3 and 2 accordingly. However, 202 * for simplicity we skip the check here. 203 */ 204 cell = fdt_getprop(blob, node, prop_name, &len); 205 if (!cell) 206 goto fail; 207 208 if ((len % FDT_PCI_REG_SIZE) == 0) { 209 int num = len / FDT_PCI_REG_SIZE; 210 int i; 211 212 for (i = 0; i < num; i++) { 213 debug("pci address #%d: %08lx %08lx %08lx\n", i, 214 (ulong)fdt32_to_cpu(cell[0]), 215 (ulong)fdt32_to_cpu(cell[1]), 216 (ulong)fdt32_to_cpu(cell[2])); 217 if ((fdt32_to_cpu(*cell) & type) == type) { 218 addr->phys_hi = fdt32_to_cpu(cell[0]); 219 addr->phys_mid = fdt32_to_cpu(cell[1]); 220 addr->phys_lo = fdt32_to_cpu(cell[1]); 221 break; 222 } else { 223 cell += (FDT_PCI_ADDR_CELLS + 224 FDT_PCI_SIZE_CELLS); 225 } 226 } 227 228 if (i == num) { 229 ret = -ENXIO; 230 goto fail; 231 } 232 233 return 0; 234 } else { 235 ret = -EINVAL; 236 } 237 238 fail: 239 debug("(not found)\n"); 240 return ret; 241 } 242 243 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 244 { 245 const char *list, *end; 246 int len; 247 248 list = fdt_getprop(blob, node, "compatible", &len); 249 if (!list) 250 return -ENOENT; 251 252 end = list + len; 253 while (list < end) { 254 char *s; 255 256 len = strlen(list); 257 if (len >= strlen("pciVVVV,DDDD")) { 258 s = strstr(list, "pci"); 259 260 /* 261 * check if the string is something like pciVVVV,DDDD.RR 262 * or just pciVVVV,DDDD 263 */ 264 if (s && s[7] == ',' && 265 (s[12] == '.' || s[12] == 0)) { 266 s += 3; 267 *vendor = simple_strtol(s, NULL, 16); 268 269 s += 5; 270 *device = simple_strtol(s, NULL, 16); 271 272 return 0; 273 } 274 } 275 list += (len + 1); 276 } 277 278 return -ENOENT; 279 } 280 281 int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr, 282 u32 *bar) 283 { 284 int barnum; 285 286 /* extract the bar number from fdt_pci_addr */ 287 barnum = addr->phys_hi & 0xff; 288 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) 289 return -EINVAL; 290 291 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; 292 *bar = dm_pci_read_bar32(dev, barnum); 293 294 return 0; 295 } 296 #endif 297 298 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 299 uint64_t default_val) 300 { 301 const uint64_t *cell64; 302 int length; 303 304 cell64 = fdt_getprop(blob, node, prop_name, &length); 305 if (!cell64 || length < sizeof(*cell64)) 306 return default_val; 307 308 return fdt64_to_cpu(*cell64); 309 } 310 311 int fdtdec_get_is_enabled(const void *blob, int node) 312 { 313 const char *cell; 314 315 /* 316 * It should say "okay", so only allow that. Some fdts use "ok" but 317 * this is a bug. Please fix your device tree source file. See here 318 * for discussion: 319 * 320 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 321 */ 322 cell = fdt_getprop(blob, node, "status", NULL); 323 if (cell) 324 return 0 == strcmp(cell, "okay"); 325 return 1; 326 } 327 328 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 329 { 330 enum fdt_compat_id id; 331 332 /* Search our drivers */ 333 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 334 if (0 == fdt_node_check_compatible(blob, node, 335 compat_names[id])) 336 return id; 337 return COMPAT_UNKNOWN; 338 } 339 340 int fdtdec_next_compatible(const void *blob, int node, 341 enum fdt_compat_id id) 342 { 343 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 344 } 345 346 int fdtdec_next_compatible_subnode(const void *blob, int node, 347 enum fdt_compat_id id, int *depthp) 348 { 349 do { 350 node = fdt_next_node(blob, node, depthp); 351 } while (*depthp > 1); 352 353 /* If this is a direct subnode, and compatible, return it */ 354 if (*depthp == 1 && 0 == fdt_node_check_compatible( 355 blob, node, compat_names[id])) 356 return node; 357 358 return -FDT_ERR_NOTFOUND; 359 } 360 361 int fdtdec_next_alias(const void *blob, const char *name, 362 enum fdt_compat_id id, int *upto) 363 { 364 #define MAX_STR_LEN 20 365 char str[MAX_STR_LEN + 20]; 366 int node, err; 367 368 /* snprintf() is not available */ 369 assert(strlen(name) < MAX_STR_LEN); 370 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 371 node = fdt_path_offset(blob, str); 372 if (node < 0) 373 return node; 374 err = fdt_node_check_compatible(blob, node, compat_names[id]); 375 if (err < 0) 376 return err; 377 if (err) 378 return -FDT_ERR_NOTFOUND; 379 (*upto)++; 380 return node; 381 } 382 383 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 384 enum fdt_compat_id id, int *node_list, int maxcount) 385 { 386 memset(node_list, '\0', sizeof(*node_list) * maxcount); 387 388 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 389 } 390 391 /* TODO: Can we tighten this code up a little? */ 392 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 393 enum fdt_compat_id id, int *node_list, int maxcount) 394 { 395 int name_len = strlen(name); 396 int nodes[maxcount]; 397 int num_found = 0; 398 int offset, node; 399 int alias_node; 400 int count; 401 int i, j; 402 403 /* find the alias node if present */ 404 alias_node = fdt_path_offset(blob, "/aliases"); 405 406 /* 407 * start with nothing, and we can assume that the root node can't 408 * match 409 */ 410 memset(nodes, '\0', sizeof(nodes)); 411 412 /* First find all the compatible nodes */ 413 for (node = count = 0; node >= 0 && count < maxcount;) { 414 node = fdtdec_next_compatible(blob, node, id); 415 if (node >= 0) 416 nodes[count++] = node; 417 } 418 if (node >= 0) 419 debug("%s: warning: maxcount exceeded with alias '%s'\n", 420 __func__, name); 421 422 /* Now find all the aliases */ 423 for (offset = fdt_first_property_offset(blob, alias_node); 424 offset > 0; 425 offset = fdt_next_property_offset(blob, offset)) { 426 const struct fdt_property *prop; 427 const char *path; 428 int number; 429 int found; 430 431 node = 0; 432 prop = fdt_get_property_by_offset(blob, offset, NULL); 433 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 434 if (prop->len && 0 == strncmp(path, name, name_len)) 435 node = fdt_path_offset(blob, prop->data); 436 if (node <= 0) 437 continue; 438 439 /* Get the alias number */ 440 number = simple_strtoul(path + name_len, NULL, 10); 441 if (number < 0 || number >= maxcount) { 442 debug("%s: warning: alias '%s' is out of range\n", 443 __func__, path); 444 continue; 445 } 446 447 /* Make sure the node we found is actually in our list! */ 448 found = -1; 449 for (j = 0; j < count; j++) 450 if (nodes[j] == node) { 451 found = j; 452 break; 453 } 454 455 if (found == -1) { 456 debug("%s: warning: alias '%s' points to a node " 457 "'%s' that is missing or is not compatible " 458 " with '%s'\n", __func__, path, 459 fdt_get_name(blob, node, NULL), 460 compat_names[id]); 461 continue; 462 } 463 464 /* 465 * Add this node to our list in the right place, and mark 466 * it as done. 467 */ 468 if (fdtdec_get_is_enabled(blob, node)) { 469 if (node_list[number]) { 470 debug("%s: warning: alias '%s' requires that " 471 "a node be placed in the list in a " 472 "position which is already filled by " 473 "node '%s'\n", __func__, path, 474 fdt_get_name(blob, node, NULL)); 475 continue; 476 } 477 node_list[number] = node; 478 if (number >= num_found) 479 num_found = number + 1; 480 } 481 nodes[found] = 0; 482 } 483 484 /* Add any nodes not mentioned by an alias */ 485 for (i = j = 0; i < maxcount; i++) { 486 if (!node_list[i]) { 487 for (; j < maxcount; j++) 488 if (nodes[j] && 489 fdtdec_get_is_enabled(blob, nodes[j])) 490 break; 491 492 /* Have we run out of nodes to add? */ 493 if (j == maxcount) 494 break; 495 496 assert(!node_list[i]); 497 node_list[i] = nodes[j++]; 498 if (i >= num_found) 499 num_found = i + 1; 500 } 501 } 502 503 return num_found; 504 } 505 506 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 507 int *seqp) 508 { 509 int base_len = strlen(base); 510 const char *find_name; 511 int find_namelen; 512 int prop_offset; 513 int aliases; 514 515 find_name = fdt_get_name(blob, offset, &find_namelen); 516 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 517 518 aliases = fdt_path_offset(blob, "/aliases"); 519 for (prop_offset = fdt_first_property_offset(blob, aliases); 520 prop_offset > 0; 521 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 522 const char *prop; 523 const char *name; 524 const char *slash; 525 int len, val; 526 527 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 528 debug(" - %s, %s\n", name, prop); 529 if (len < find_namelen || *prop != '/' || prop[len - 1] || 530 strncmp(name, base, base_len)) 531 continue; 532 533 slash = strrchr(prop, '/'); 534 if (strcmp(slash + 1, find_name)) 535 continue; 536 val = trailing_strtol(name); 537 if (val != -1) { 538 *seqp = val; 539 debug("Found seq %d\n", *seqp); 540 return 0; 541 } 542 } 543 544 debug("Not found\n"); 545 return -ENOENT; 546 } 547 548 const char *fdtdec_get_chosen_prop(const void *blob, const char *name) 549 { 550 int chosen_node; 551 552 if (!blob) 553 return NULL; 554 chosen_node = fdt_path_offset(blob, "/chosen"); 555 return fdt_getprop(blob, chosen_node, name, NULL); 556 } 557 558 int fdtdec_get_chosen_node(const void *blob, const char *name) 559 { 560 const char *prop; 561 562 prop = fdtdec_get_chosen_prop(blob, name); 563 if (!prop) 564 return -FDT_ERR_NOTFOUND; 565 return fdt_path_offset(blob, prop); 566 } 567 568 int fdtdec_check_fdt(void) 569 { 570 /* 571 * We must have an FDT, but we cannot panic() yet since the console 572 * is not ready. So for now, just assert(). Boards which need an early 573 * FDT (prior to console ready) will need to make their own 574 * arrangements and do their own checks. 575 */ 576 assert(!fdtdec_prepare_fdt()); 577 return 0; 578 } 579 580 /* 581 * This function is a little odd in that it accesses global data. At some 582 * point if the architecture board.c files merge this will make more sense. 583 * Even now, it is common code. 584 */ 585 int fdtdec_prepare_fdt(void) 586 { 587 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 588 fdt_check_header(gd->fdt_blob)) { 589 #ifdef CONFIG_SPL_BUILD 590 puts("Missing DTB\n"); 591 #else 592 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"); 593 # ifdef DEBUG 594 if (gd->fdt_blob) { 595 printf("fdt_blob=%p\n", gd->fdt_blob); 596 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4, 597 32, 0); 598 } 599 # endif 600 #endif 601 return -1; 602 } 603 return 0; 604 } 605 606 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 607 { 608 const u32 *phandle; 609 int lookup; 610 611 debug("%s: %s\n", __func__, prop_name); 612 phandle = fdt_getprop(blob, node, prop_name, NULL); 613 if (!phandle) 614 return -FDT_ERR_NOTFOUND; 615 616 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 617 return lookup; 618 } 619 620 /** 621 * Look up a property in a node and check that it has a minimum length. 622 * 623 * @param blob FDT blob 624 * @param node node to examine 625 * @param prop_name name of property to find 626 * @param min_len minimum property length in bytes 627 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 628 found, or -FDT_ERR_BADLAYOUT if not enough data 629 * @return pointer to cell, which is only valid if err == 0 630 */ 631 static const void *get_prop_check_min_len(const void *blob, int node, 632 const char *prop_name, int min_len, int *err) 633 { 634 const void *cell; 635 int len; 636 637 debug("%s: %s\n", __func__, prop_name); 638 cell = fdt_getprop(blob, node, prop_name, &len); 639 if (!cell) 640 *err = -FDT_ERR_NOTFOUND; 641 else if (len < min_len) 642 *err = -FDT_ERR_BADLAYOUT; 643 else 644 *err = 0; 645 return cell; 646 } 647 648 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 649 u32 *array, int count) 650 { 651 const u32 *cell; 652 int i, err = 0; 653 654 debug("%s: %s\n", __func__, prop_name); 655 cell = get_prop_check_min_len(blob, node, prop_name, 656 sizeof(u32) * count, &err); 657 if (!err) { 658 for (i = 0; i < count; i++) 659 array[i] = fdt32_to_cpu(cell[i]); 660 } 661 return err; 662 } 663 664 int fdtdec_get_int_array_count(const void *blob, int node, 665 const char *prop_name, u32 *array, int count) 666 { 667 const u32 *cell; 668 int len, elems; 669 int i; 670 671 debug("%s: %s\n", __func__, prop_name); 672 cell = fdt_getprop(blob, node, prop_name, &len); 673 if (!cell) 674 return -FDT_ERR_NOTFOUND; 675 elems = len / sizeof(u32); 676 if (count > elems) 677 count = elems; 678 for (i = 0; i < count; i++) 679 array[i] = fdt32_to_cpu(cell[i]); 680 681 return count; 682 } 683 684 const u32 *fdtdec_locate_array(const void *blob, int node, 685 const char *prop_name, int count) 686 { 687 const u32 *cell; 688 int err; 689 690 cell = get_prop_check_min_len(blob, node, prop_name, 691 sizeof(u32) * count, &err); 692 return err ? NULL : cell; 693 } 694 695 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 696 { 697 const s32 *cell; 698 int len; 699 700 debug("%s: %s\n", __func__, prop_name); 701 cell = fdt_getprop(blob, node, prop_name, &len); 702 return cell != NULL; 703 } 704 705 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 706 const char *list_name, 707 const char *cells_name, 708 int cell_count, int index, 709 struct fdtdec_phandle_args *out_args) 710 { 711 const __be32 *list, *list_end; 712 int rc = 0, size, cur_index = 0; 713 uint32_t count = 0; 714 int node = -1; 715 int phandle; 716 717 /* Retrieve the phandle list property */ 718 list = fdt_getprop(blob, src_node, list_name, &size); 719 if (!list) 720 return -ENOENT; 721 list_end = list + size / sizeof(*list); 722 723 /* Loop over the phandles until all the requested entry is found */ 724 while (list < list_end) { 725 rc = -EINVAL; 726 count = 0; 727 728 /* 729 * If phandle is 0, then it is an empty entry with no 730 * arguments. Skip forward to the next entry. 731 */ 732 phandle = be32_to_cpup(list++); 733 if (phandle) { 734 /* 735 * Find the provider node and parse the #*-cells 736 * property to determine the argument length. 737 * 738 * This is not needed if the cell count is hard-coded 739 * (i.e. cells_name not set, but cell_count is set), 740 * except when we're going to return the found node 741 * below. 742 */ 743 if (cells_name || cur_index == index) { 744 node = fdt_node_offset_by_phandle(blob, 745 phandle); 746 if (!node) { 747 debug("%s: could not find phandle\n", 748 fdt_get_name(blob, src_node, 749 NULL)); 750 goto err; 751 } 752 } 753 754 if (cells_name) { 755 count = fdtdec_get_int(blob, node, cells_name, 756 -1); 757 if (count == -1) { 758 debug("%s: could not get %s for %s\n", 759 fdt_get_name(blob, src_node, 760 NULL), 761 cells_name, 762 fdt_get_name(blob, node, 763 NULL)); 764 goto err; 765 } 766 } else { 767 count = cell_count; 768 } 769 770 /* 771 * Make sure that the arguments actually fit in the 772 * remaining property data length 773 */ 774 if (list + count > list_end) { 775 debug("%s: arguments longer than property\n", 776 fdt_get_name(blob, src_node, NULL)); 777 goto err; 778 } 779 } 780 781 /* 782 * All of the error cases above bail out of the loop, so at 783 * this point, the parsing is successful. If the requested 784 * index matches, then fill the out_args structure and return, 785 * or return -ENOENT for an empty entry. 786 */ 787 rc = -ENOENT; 788 if (cur_index == index) { 789 if (!phandle) 790 goto err; 791 792 if (out_args) { 793 int i; 794 795 if (count > MAX_PHANDLE_ARGS) { 796 debug("%s: too many arguments %d\n", 797 fdt_get_name(blob, src_node, 798 NULL), count); 799 count = MAX_PHANDLE_ARGS; 800 } 801 out_args->node = node; 802 out_args->args_count = count; 803 for (i = 0; i < count; i++) { 804 out_args->args[i] = 805 be32_to_cpup(list++); 806 } 807 } 808 809 /* Found it! return success */ 810 return 0; 811 } 812 813 node = -1; 814 list += count; 815 cur_index++; 816 } 817 818 /* 819 * Result will be one of: 820 * -ENOENT : index is for empty phandle 821 * -EINVAL : parsing error on data 822 * [1..n] : Number of phandle (count mode; when index = -1) 823 */ 824 rc = index < 0 ? cur_index : -ENOENT; 825 err: 826 return rc; 827 } 828 829 int fdtdec_get_child_count(const void *blob, int node) 830 { 831 int subnode; 832 int num = 0; 833 834 fdt_for_each_subnode(blob, subnode, node) 835 num++; 836 837 return num; 838 } 839 840 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 841 u8 *array, int count) 842 { 843 const u8 *cell; 844 int err; 845 846 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 847 if (!err) 848 memcpy(array, cell, count); 849 return err; 850 } 851 852 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 853 const char *prop_name, int count) 854 { 855 const u8 *cell; 856 int err; 857 858 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 859 if (err) 860 return NULL; 861 return cell; 862 } 863 864 int fdtdec_get_config_int(const void *blob, const char *prop_name, 865 int default_val) 866 { 867 int config_node; 868 869 debug("%s: %s\n", __func__, prop_name); 870 config_node = fdt_path_offset(blob, "/config"); 871 if (config_node < 0) 872 return default_val; 873 return fdtdec_get_int(blob, config_node, prop_name, default_val); 874 } 875 876 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 877 { 878 int config_node; 879 const void *prop; 880 881 debug("%s: %s\n", __func__, prop_name); 882 config_node = fdt_path_offset(blob, "/config"); 883 if (config_node < 0) 884 return 0; 885 prop = fdt_get_property(blob, config_node, prop_name, NULL); 886 887 return prop != NULL; 888 } 889 890 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 891 { 892 const char *nodep; 893 int nodeoffset; 894 int len; 895 896 debug("%s: %s\n", __func__, prop_name); 897 nodeoffset = fdt_path_offset(blob, "/config"); 898 if (nodeoffset < 0) 899 return NULL; 900 901 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 902 if (!nodep) 903 return NULL; 904 905 return (char *)nodep; 906 } 907 908 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 909 fdt_addr_t *basep, fdt_size_t *sizep) 910 { 911 const fdt_addr_t *cell; 912 int len; 913 914 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 915 prop_name); 916 cell = fdt_getprop(blob, node, prop_name, &len); 917 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 918 debug("cell=%p, len=%d\n", cell, len); 919 return -1; 920 } 921 922 *basep = fdt_addr_to_cpu(*cell); 923 *sizep = fdt_size_to_cpu(cell[1]); 924 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 925 (ulong)*sizep); 926 927 return 0; 928 } 929 930 /** 931 * Read a flash entry from the fdt 932 * 933 * @param blob FDT blob 934 * @param node Offset of node to read 935 * @param name Name of node being read 936 * @param entry Place to put offset and size of this node 937 * @return 0 if ok, -ve on error 938 */ 939 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 940 struct fmap_entry *entry) 941 { 942 const char *prop; 943 u32 reg[2]; 944 945 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 946 debug("Node '%s' has bad/missing 'reg' property\n", name); 947 return -FDT_ERR_NOTFOUND; 948 } 949 entry->offset = reg[0]; 950 entry->length = reg[1]; 951 entry->used = fdtdec_get_int(blob, node, "used", entry->length); 952 prop = fdt_getprop(blob, node, "compress", NULL); 953 entry->compress_algo = prop && !strcmp(prop, "lzo") ? 954 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; 955 prop = fdt_getprop(blob, node, "hash", &entry->hash_size); 956 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; 957 entry->hash = (uint8_t *)prop; 958 959 return 0; 960 } 961 962 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 963 { 964 u64 number = 0; 965 966 while (cells--) 967 number = (number << 32) | fdt32_to_cpu(*ptr++); 968 969 return number; 970 } 971 972 int fdt_get_resource(const void *fdt, int node, const char *property, 973 unsigned int index, struct fdt_resource *res) 974 { 975 const fdt32_t *ptr, *end; 976 int na, ns, len, parent; 977 unsigned int i = 0; 978 979 parent = fdt_parent_offset(fdt, node); 980 if (parent < 0) 981 return parent; 982 983 na = fdt_address_cells(fdt, parent); 984 ns = fdt_size_cells(fdt, parent); 985 986 ptr = fdt_getprop(fdt, node, property, &len); 987 if (!ptr) 988 return len; 989 990 end = ptr + len / sizeof(*ptr); 991 992 while (ptr + na + ns <= end) { 993 if (i == index) { 994 res->start = res->end = fdtdec_get_number(ptr, na); 995 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 996 return 0; 997 } 998 999 ptr += na + ns; 1000 i++; 1001 } 1002 1003 return -FDT_ERR_NOTFOUND; 1004 } 1005 1006 int fdt_get_named_resource(const void *fdt, int node, const char *property, 1007 const char *prop_names, const char *name, 1008 struct fdt_resource *res) 1009 { 1010 int index; 1011 1012 index = fdt_find_string(fdt, node, prop_names, name); 1013 if (index < 0) 1014 return index; 1015 1016 return fdt_get_resource(fdt, node, property, index, res); 1017 } 1018 1019 int fdtdec_decode_memory_region(const void *blob, int config_node, 1020 const char *mem_type, const char *suffix, 1021 fdt_addr_t *basep, fdt_size_t *sizep) 1022 { 1023 char prop_name[50]; 1024 const char *mem; 1025 fdt_size_t size, offset_size; 1026 fdt_addr_t base, offset; 1027 int node; 1028 1029 if (config_node == -1) { 1030 config_node = fdt_path_offset(blob, "/config"); 1031 if (config_node < 0) { 1032 debug("%s: Cannot find /config node\n", __func__); 1033 return -ENOENT; 1034 } 1035 } 1036 if (!suffix) 1037 suffix = ""; 1038 1039 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 1040 suffix); 1041 mem = fdt_getprop(blob, config_node, prop_name, NULL); 1042 if (!mem) { 1043 debug("%s: No memory type for '%s', using /memory\n", __func__, 1044 prop_name); 1045 mem = "/memory"; 1046 } 1047 1048 node = fdt_path_offset(blob, mem); 1049 if (node < 0) { 1050 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 1051 fdt_strerror(node)); 1052 return -ENOENT; 1053 } 1054 1055 /* 1056 * Not strictly correct - the memory may have multiple banks. We just 1057 * use the first 1058 */ 1059 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 1060 debug("%s: Failed to decode memory region %s\n", __func__, 1061 mem); 1062 return -EINVAL; 1063 } 1064 1065 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 1066 suffix); 1067 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 1068 &offset_size)) { 1069 debug("%s: Failed to decode memory region '%s'\n", __func__, 1070 prop_name); 1071 return -EINVAL; 1072 } 1073 1074 *basep = base + offset; 1075 *sizep = offset_size; 1076 1077 return 0; 1078 } 1079 1080 static int decode_timing_property(const void *blob, int node, const char *name, 1081 struct timing_entry *result) 1082 { 1083 int length, ret = 0; 1084 const u32 *prop; 1085 1086 prop = fdt_getprop(blob, node, name, &length); 1087 if (!prop) { 1088 debug("%s: could not find property %s\n", 1089 fdt_get_name(blob, node, NULL), name); 1090 return length; 1091 } 1092 1093 if (length == sizeof(u32)) { 1094 result->typ = fdtdec_get_int(blob, node, name, 0); 1095 result->min = result->typ; 1096 result->max = result->typ; 1097 } else { 1098 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3); 1099 } 1100 1101 return ret; 1102 } 1103 1104 int fdtdec_decode_display_timing(const void *blob, int parent, int index, 1105 struct display_timing *dt) 1106 { 1107 int i, node, timings_node; 1108 u32 val = 0; 1109 int ret = 0; 1110 1111 timings_node = fdt_subnode_offset(blob, parent, "display-timings"); 1112 if (timings_node < 0) 1113 return timings_node; 1114 1115 for (i = 0, node = fdt_first_subnode(blob, timings_node); 1116 node > 0 && i != index; 1117 node = fdt_next_subnode(blob, node)) 1118 i++; 1119 1120 if (node < 0) 1121 return node; 1122 1123 memset(dt, 0, sizeof(*dt)); 1124 1125 ret |= decode_timing_property(blob, node, "hback-porch", 1126 &dt->hback_porch); 1127 ret |= decode_timing_property(blob, node, "hfront-porch", 1128 &dt->hfront_porch); 1129 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive); 1130 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len); 1131 ret |= decode_timing_property(blob, node, "vback-porch", 1132 &dt->vback_porch); 1133 ret |= decode_timing_property(blob, node, "vfront-porch", 1134 &dt->vfront_porch); 1135 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive); 1136 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len); 1137 ret |= decode_timing_property(blob, node, "clock-frequency", 1138 &dt->pixelclock); 1139 1140 dt->flags = 0; 1141 val = fdtdec_get_int(blob, node, "vsync-active", -1); 1142 if (val != -1) { 1143 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : 1144 DISPLAY_FLAGS_VSYNC_LOW; 1145 } 1146 val = fdtdec_get_int(blob, node, "hsync-active", -1); 1147 if (val != -1) { 1148 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : 1149 DISPLAY_FLAGS_HSYNC_LOW; 1150 } 1151 val = fdtdec_get_int(blob, node, "de-active", -1); 1152 if (val != -1) { 1153 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : 1154 DISPLAY_FLAGS_DE_LOW; 1155 } 1156 val = fdtdec_get_int(blob, node, "pixelclk-active", -1); 1157 if (val != -1) { 1158 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : 1159 DISPLAY_FLAGS_PIXDATA_NEGEDGE; 1160 } 1161 1162 if (fdtdec_get_bool(blob, node, "interlaced")) 1163 dt->flags |= DISPLAY_FLAGS_INTERLACED; 1164 if (fdtdec_get_bool(blob, node, "doublescan")) 1165 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; 1166 if (fdtdec_get_bool(blob, node, "doubleclk")) 1167 dt->flags |= DISPLAY_FLAGS_DOUBLECLK; 1168 1169 return ret; 1170 } 1171 1172 int fdtdec_setup(void) 1173 { 1174 #if CONFIG_IS_ENABLED(OF_CONTROL) 1175 # ifdef CONFIG_OF_EMBED 1176 /* Get a pointer to the FDT */ 1177 gd->fdt_blob = __dtb_dt_begin; 1178 # elif defined CONFIG_OF_SEPARATE 1179 # ifdef CONFIG_SPL_BUILD 1180 /* FDT is at end of BSS unless it is in a different memory region */ 1181 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS)) 1182 gd->fdt_blob = (ulong *)&_image_binary_end; 1183 else 1184 gd->fdt_blob = (ulong *)&__bss_end; 1185 # else 1186 /* FDT is at end of image */ 1187 gd->fdt_blob = (ulong *)&_end; 1188 # endif 1189 # elif defined(CONFIG_OF_HOSTFILE) 1190 if (sandbox_read_fdt_from_file()) { 1191 puts("Failed to read control FDT\n"); 1192 return -1; 1193 } 1194 # endif 1195 # ifndef CONFIG_SPL_BUILD 1196 /* Allow the early environment to override the fdt address */ 1197 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, 1198 (uintptr_t)gd->fdt_blob); 1199 # endif 1200 #endif 1201 return fdtdec_prepare_fdt(); 1202 } 1203 1204 #endif /* !USE_HOSTCC */ 1205