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 * NOTE: This list is basically a TODO list for things that need to be 24 * converted to driver model. So don't add new things here unless there is a 25 * good reason why driver-model conversion is infeasible. Examples include 26 * things which are used before driver model is available. 27 */ 28 #define COMPAT(id, name) name 29 static const char * const compat_names[COMPAT_COUNT] = { 30 COMPAT(UNKNOWN, "<none>"), 31 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"), 32 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"), 33 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"), 34 COMPAT(NVIDIA_TEGRA124_PMC, "nvidia,tegra124-pmc"), 35 COMPAT(NVIDIA_TEGRA186_SDMMC, "nvidia,tegra186-sdhci"), 36 COMPAT(NVIDIA_TEGRA210_SDMMC, "nvidia,tegra210-sdhci"), 37 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"), 38 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"), 39 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"), 40 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"), 41 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"), 42 COMPAT(SMSC_LAN9215, "smsc,lan9215"), 43 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), 44 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), 45 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), 46 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), 47 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), 48 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"), 49 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), 50 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"), 51 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), 52 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), 53 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"), 54 COMPAT(GENERIC_SPI_FLASH, "spi-flash"), 55 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), 56 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), 57 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), 58 COMPAT(INTEL_MICROCODE, "intel,microcode"), 59 COMPAT(AMS_AS3722, "ams,as3722"), 60 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"), 61 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"), 62 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"), 63 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"), 64 COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"), 65 COMPAT(INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"), 66 COMPAT(INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"), 67 COMPAT(INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"), 68 }; 69 70 const char *fdtdec_get_compatible(enum fdt_compat_id id) 71 { 72 /* We allow reading of the 'unknown' ID for testing purposes */ 73 assert(id >= 0 && id < COMPAT_COUNT); 74 return compat_names[id]; 75 } 76 77 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node, 78 const char *prop_name, int index, int na, int ns, 79 fdt_size_t *sizep) 80 { 81 const fdt32_t *prop, *prop_end; 82 const fdt32_t *prop_addr, *prop_size, *prop_after_size; 83 int len; 84 fdt_addr_t addr; 85 86 debug("%s: %s: ", __func__, prop_name); 87 88 if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) { 89 debug("(na too large for fdt_addr_t type)\n"); 90 return FDT_ADDR_T_NONE; 91 } 92 93 if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) { 94 debug("(ns too large for fdt_size_t type)\n"); 95 return FDT_ADDR_T_NONE; 96 } 97 98 prop = fdt_getprop(blob, node, prop_name, &len); 99 if (!prop) { 100 debug("(not found)\n"); 101 return FDT_ADDR_T_NONE; 102 } 103 prop_end = prop + (len / sizeof(*prop)); 104 105 prop_addr = prop + (index * (na + ns)); 106 prop_size = prop_addr + na; 107 prop_after_size = prop_size + ns; 108 if (prop_after_size > prop_end) { 109 debug("(not enough data: expected >= %d cells, got %d cells)\n", 110 (u32)(prop_after_size - prop), ((u32)(prop_end - prop))); 111 return FDT_ADDR_T_NONE; 112 } 113 114 addr = fdtdec_get_number(prop_addr, na); 115 116 if (sizep) { 117 *sizep = fdtdec_get_number(prop_size, ns); 118 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr, 119 (unsigned long long)*sizep); 120 } else { 121 debug("addr=%08llx\n", (unsigned long long)addr); 122 } 123 124 return addr; 125 } 126 127 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent, 128 int node, const char *prop_name, int index, fdt_size_t *sizep) 129 { 130 int na, ns; 131 132 debug("%s: ", __func__); 133 134 na = fdt_address_cells(blob, parent); 135 if (na < 1) { 136 debug("(bad #address-cells)\n"); 137 return FDT_ADDR_T_NONE; 138 } 139 140 ns = fdt_size_cells(blob, parent); 141 if (ns < 0) { 142 debug("(bad #size-cells)\n"); 143 return FDT_ADDR_T_NONE; 144 } 145 146 debug("na=%d, ns=%d, ", na, ns); 147 148 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na, 149 ns, sizep); 150 } 151 152 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node, 153 const char *prop_name, int index, fdt_size_t *sizep) 154 { 155 int parent; 156 157 debug("%s: ", __func__); 158 159 parent = fdt_parent_offset(blob, node); 160 if (parent < 0) { 161 debug("(no parent found)\n"); 162 return FDT_ADDR_T_NONE; 163 } 164 165 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name, 166 index, sizep); 167 } 168 169 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 170 const char *prop_name, fdt_size_t *sizep) 171 { 172 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0; 173 174 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0, 175 sizeof(fdt_addr_t) / sizeof(fdt32_t), 176 ns, sizep); 177 } 178 179 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 180 const char *prop_name) 181 { 182 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 183 } 184 185 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI) 186 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 187 const char *prop_name, struct fdt_pci_addr *addr) 188 { 189 const u32 *cell; 190 int len; 191 int ret = -ENOENT; 192 193 debug("%s: %s: ", __func__, prop_name); 194 195 /* 196 * If we follow the pci bus bindings strictly, we should check 197 * the value of the node's parent node's #address-cells and 198 * #size-cells. They need to be 3 and 2 accordingly. However, 199 * for simplicity we skip the check here. 200 */ 201 cell = fdt_getprop(blob, node, prop_name, &len); 202 if (!cell) 203 goto fail; 204 205 if ((len % FDT_PCI_REG_SIZE) == 0) { 206 int num = len / FDT_PCI_REG_SIZE; 207 int i; 208 209 for (i = 0; i < num; i++) { 210 debug("pci address #%d: %08lx %08lx %08lx\n", i, 211 (ulong)fdt32_to_cpu(cell[0]), 212 (ulong)fdt32_to_cpu(cell[1]), 213 (ulong)fdt32_to_cpu(cell[2])); 214 if ((fdt32_to_cpu(*cell) & type) == type) { 215 addr->phys_hi = fdt32_to_cpu(cell[0]); 216 addr->phys_mid = fdt32_to_cpu(cell[1]); 217 addr->phys_lo = fdt32_to_cpu(cell[1]); 218 break; 219 } else { 220 cell += (FDT_PCI_ADDR_CELLS + 221 FDT_PCI_SIZE_CELLS); 222 } 223 } 224 225 if (i == num) { 226 ret = -ENXIO; 227 goto fail; 228 } 229 230 return 0; 231 } else { 232 ret = -EINVAL; 233 } 234 235 fail: 236 debug("(not found)\n"); 237 return ret; 238 } 239 240 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 241 { 242 const char *list, *end; 243 int len; 244 245 list = fdt_getprop(blob, node, "compatible", &len); 246 if (!list) 247 return -ENOENT; 248 249 end = list + len; 250 while (list < end) { 251 char *s; 252 253 len = strlen(list); 254 if (len >= strlen("pciVVVV,DDDD")) { 255 s = strstr(list, "pci"); 256 257 /* 258 * check if the string is something like pciVVVV,DDDD.RR 259 * or just pciVVVV,DDDD 260 */ 261 if (s && s[7] == ',' && 262 (s[12] == '.' || s[12] == 0)) { 263 s += 3; 264 *vendor = simple_strtol(s, NULL, 16); 265 266 s += 5; 267 *device = simple_strtol(s, NULL, 16); 268 269 return 0; 270 } 271 } 272 list += (len + 1); 273 } 274 275 return -ENOENT; 276 } 277 278 int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr, 279 u32 *bar) 280 { 281 int barnum; 282 283 /* extract the bar number from fdt_pci_addr */ 284 barnum = addr->phys_hi & 0xff; 285 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) 286 return -EINVAL; 287 288 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; 289 *bar = dm_pci_read_bar32(dev, barnum); 290 291 return 0; 292 } 293 #endif 294 295 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 296 uint64_t default_val) 297 { 298 const uint64_t *cell64; 299 int length; 300 301 cell64 = fdt_getprop(blob, node, prop_name, &length); 302 if (!cell64 || length < sizeof(*cell64)) 303 return default_val; 304 305 return fdt64_to_cpu(*cell64); 306 } 307 308 int fdtdec_get_is_enabled(const void *blob, int node) 309 { 310 const char *cell; 311 312 /* 313 * It should say "okay", so only allow that. Some fdts use "ok" but 314 * this is a bug. Please fix your device tree source file. See here 315 * for discussion: 316 * 317 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 318 */ 319 cell = fdt_getprop(blob, node, "status", NULL); 320 if (cell) 321 return 0 == strcmp(cell, "okay"); 322 return 1; 323 } 324 325 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 326 { 327 enum fdt_compat_id id; 328 329 /* Search our drivers */ 330 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 331 if (0 == fdt_node_check_compatible(blob, node, 332 compat_names[id])) 333 return id; 334 return COMPAT_UNKNOWN; 335 } 336 337 int fdtdec_next_compatible(const void *blob, int node, 338 enum fdt_compat_id id) 339 { 340 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 341 } 342 343 int fdtdec_next_compatible_subnode(const void *blob, int node, 344 enum fdt_compat_id id, int *depthp) 345 { 346 do { 347 node = fdt_next_node(blob, node, depthp); 348 } while (*depthp > 1); 349 350 /* If this is a direct subnode, and compatible, return it */ 351 if (*depthp == 1 && 0 == fdt_node_check_compatible( 352 blob, node, compat_names[id])) 353 return node; 354 355 return -FDT_ERR_NOTFOUND; 356 } 357 358 int fdtdec_next_alias(const void *blob, const char *name, 359 enum fdt_compat_id id, int *upto) 360 { 361 #define MAX_STR_LEN 20 362 char str[MAX_STR_LEN + 20]; 363 int node, err; 364 365 /* snprintf() is not available */ 366 assert(strlen(name) < MAX_STR_LEN); 367 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 368 node = fdt_path_offset(blob, str); 369 if (node < 0) 370 return node; 371 err = fdt_node_check_compatible(blob, node, compat_names[id]); 372 if (err < 0) 373 return err; 374 if (err) 375 return -FDT_ERR_NOTFOUND; 376 (*upto)++; 377 return node; 378 } 379 380 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 381 enum fdt_compat_id id, int *node_list, int maxcount) 382 { 383 memset(node_list, '\0', sizeof(*node_list) * maxcount); 384 385 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 386 } 387 388 /* TODO: Can we tighten this code up a little? */ 389 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 390 enum fdt_compat_id id, int *node_list, int maxcount) 391 { 392 int name_len = strlen(name); 393 int nodes[maxcount]; 394 int num_found = 0; 395 int offset, node; 396 int alias_node; 397 int count; 398 int i, j; 399 400 /* find the alias node if present */ 401 alias_node = fdt_path_offset(blob, "/aliases"); 402 403 /* 404 * start with nothing, and we can assume that the root node can't 405 * match 406 */ 407 memset(nodes, '\0', sizeof(nodes)); 408 409 /* First find all the compatible nodes */ 410 for (node = count = 0; node >= 0 && count < maxcount;) { 411 node = fdtdec_next_compatible(blob, node, id); 412 if (node >= 0) 413 nodes[count++] = node; 414 } 415 if (node >= 0) 416 debug("%s: warning: maxcount exceeded with alias '%s'\n", 417 __func__, name); 418 419 /* Now find all the aliases */ 420 for (offset = fdt_first_property_offset(blob, alias_node); 421 offset > 0; 422 offset = fdt_next_property_offset(blob, offset)) { 423 const struct fdt_property *prop; 424 const char *path; 425 int number; 426 int found; 427 428 node = 0; 429 prop = fdt_get_property_by_offset(blob, offset, NULL); 430 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 431 if (prop->len && 0 == strncmp(path, name, name_len)) 432 node = fdt_path_offset(blob, prop->data); 433 if (node <= 0) 434 continue; 435 436 /* Get the alias number */ 437 number = simple_strtoul(path + name_len, NULL, 10); 438 if (number < 0 || number >= maxcount) { 439 debug("%s: warning: alias '%s' is out of range\n", 440 __func__, path); 441 continue; 442 } 443 444 /* Make sure the node we found is actually in our list! */ 445 found = -1; 446 for (j = 0; j < count; j++) 447 if (nodes[j] == node) { 448 found = j; 449 break; 450 } 451 452 if (found == -1) { 453 debug("%s: warning: alias '%s' points to a node " 454 "'%s' that is missing or is not compatible " 455 " with '%s'\n", __func__, path, 456 fdt_get_name(blob, node, NULL), 457 compat_names[id]); 458 continue; 459 } 460 461 /* 462 * Add this node to our list in the right place, and mark 463 * it as done. 464 */ 465 if (fdtdec_get_is_enabled(blob, node)) { 466 if (node_list[number]) { 467 debug("%s: warning: alias '%s' requires that " 468 "a node be placed in the list in a " 469 "position which is already filled by " 470 "node '%s'\n", __func__, path, 471 fdt_get_name(blob, node, NULL)); 472 continue; 473 } 474 node_list[number] = node; 475 if (number >= num_found) 476 num_found = number + 1; 477 } 478 nodes[found] = 0; 479 } 480 481 /* Add any nodes not mentioned by an alias */ 482 for (i = j = 0; i < maxcount; i++) { 483 if (!node_list[i]) { 484 for (; j < maxcount; j++) 485 if (nodes[j] && 486 fdtdec_get_is_enabled(blob, nodes[j])) 487 break; 488 489 /* Have we run out of nodes to add? */ 490 if (j == maxcount) 491 break; 492 493 assert(!node_list[i]); 494 node_list[i] = nodes[j++]; 495 if (i >= num_found) 496 num_found = i + 1; 497 } 498 } 499 500 return num_found; 501 } 502 503 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 504 int *seqp) 505 { 506 int base_len = strlen(base); 507 const char *find_name; 508 int find_namelen; 509 int prop_offset; 510 int aliases; 511 512 find_name = fdt_get_name(blob, offset, &find_namelen); 513 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 514 515 aliases = fdt_path_offset(blob, "/aliases"); 516 for (prop_offset = fdt_first_property_offset(blob, aliases); 517 prop_offset > 0; 518 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 519 const char *prop; 520 const char *name; 521 const char *slash; 522 int len, val; 523 524 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 525 debug(" - %s, %s\n", name, prop); 526 if (len < find_namelen || *prop != '/' || prop[len - 1] || 527 strncmp(name, base, base_len)) 528 continue; 529 530 slash = strrchr(prop, '/'); 531 if (strcmp(slash + 1, find_name)) 532 continue; 533 val = trailing_strtol(name); 534 if (val != -1) { 535 *seqp = val; 536 debug("Found seq %d\n", *seqp); 537 return 0; 538 } 539 } 540 541 debug("Not found\n"); 542 return -ENOENT; 543 } 544 545 const char *fdtdec_get_chosen_prop(const void *blob, const char *name) 546 { 547 int chosen_node; 548 549 if (!blob) 550 return NULL; 551 chosen_node = fdt_path_offset(blob, "/chosen"); 552 return fdt_getprop(blob, chosen_node, name, NULL); 553 } 554 555 int fdtdec_get_chosen_node(const void *blob, const char *name) 556 { 557 const char *prop; 558 559 prop = fdtdec_get_chosen_prop(blob, name); 560 if (!prop) 561 return -FDT_ERR_NOTFOUND; 562 return fdt_path_offset(blob, prop); 563 } 564 565 int fdtdec_check_fdt(void) 566 { 567 /* 568 * We must have an FDT, but we cannot panic() yet since the console 569 * is not ready. So for now, just assert(). Boards which need an early 570 * FDT (prior to console ready) will need to make their own 571 * arrangements and do their own checks. 572 */ 573 assert(!fdtdec_prepare_fdt()); 574 return 0; 575 } 576 577 /* 578 * This function is a little odd in that it accesses global data. At some 579 * point if the architecture board.c files merge this will make more sense. 580 * Even now, it is common code. 581 */ 582 int fdtdec_prepare_fdt(void) 583 { 584 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 585 fdt_check_header(gd->fdt_blob)) { 586 #ifdef CONFIG_SPL_BUILD 587 puts("Missing DTB\n"); 588 #else 589 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"); 590 # ifdef DEBUG 591 if (gd->fdt_blob) { 592 printf("fdt_blob=%p\n", gd->fdt_blob); 593 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4, 594 32, 0); 595 } 596 # endif 597 #endif 598 return -1; 599 } 600 return 0; 601 } 602 603 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 604 { 605 const u32 *phandle; 606 int lookup; 607 608 debug("%s: %s\n", __func__, prop_name); 609 phandle = fdt_getprop(blob, node, prop_name, NULL); 610 if (!phandle) 611 return -FDT_ERR_NOTFOUND; 612 613 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 614 return lookup; 615 } 616 617 /** 618 * Look up a property in a node and check that it has a minimum length. 619 * 620 * @param blob FDT blob 621 * @param node node to examine 622 * @param prop_name name of property to find 623 * @param min_len minimum property length in bytes 624 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 625 found, or -FDT_ERR_BADLAYOUT if not enough data 626 * @return pointer to cell, which is only valid if err == 0 627 */ 628 static const void *get_prop_check_min_len(const void *blob, int node, 629 const char *prop_name, int min_len, int *err) 630 { 631 const void *cell; 632 int len; 633 634 debug("%s: %s\n", __func__, prop_name); 635 cell = fdt_getprop(blob, node, prop_name, &len); 636 if (!cell) 637 *err = -FDT_ERR_NOTFOUND; 638 else if (len < min_len) 639 *err = -FDT_ERR_BADLAYOUT; 640 else 641 *err = 0; 642 return cell; 643 } 644 645 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 646 u32 *array, int count) 647 { 648 const u32 *cell; 649 int i, err = 0; 650 651 debug("%s: %s\n", __func__, prop_name); 652 cell = get_prop_check_min_len(blob, node, prop_name, 653 sizeof(u32) * count, &err); 654 if (!err) { 655 for (i = 0; i < count; i++) 656 array[i] = fdt32_to_cpu(cell[i]); 657 } 658 return err; 659 } 660 661 int fdtdec_get_int_array_count(const void *blob, int node, 662 const char *prop_name, u32 *array, int count) 663 { 664 const u32 *cell; 665 int len, elems; 666 int i; 667 668 debug("%s: %s\n", __func__, prop_name); 669 cell = fdt_getprop(blob, node, prop_name, &len); 670 if (!cell) 671 return -FDT_ERR_NOTFOUND; 672 elems = len / sizeof(u32); 673 if (count > elems) 674 count = elems; 675 for (i = 0; i < count; i++) 676 array[i] = fdt32_to_cpu(cell[i]); 677 678 return count; 679 } 680 681 const u32 *fdtdec_locate_array(const void *blob, int node, 682 const char *prop_name, int count) 683 { 684 const u32 *cell; 685 int err; 686 687 cell = get_prop_check_min_len(blob, node, prop_name, 688 sizeof(u32) * count, &err); 689 return err ? NULL : cell; 690 } 691 692 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 693 { 694 const s32 *cell; 695 int len; 696 697 debug("%s: %s\n", __func__, prop_name); 698 cell = fdt_getprop(blob, node, prop_name, &len); 699 return cell != NULL; 700 } 701 702 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 703 const char *list_name, 704 const char *cells_name, 705 int cell_count, int index, 706 struct fdtdec_phandle_args *out_args) 707 { 708 const __be32 *list, *list_end; 709 int rc = 0, size, cur_index = 0; 710 uint32_t count = 0; 711 int node = -1; 712 int phandle; 713 714 /* Retrieve the phandle list property */ 715 list = fdt_getprop(blob, src_node, list_name, &size); 716 if (!list) 717 return -ENOENT; 718 list_end = list + size / sizeof(*list); 719 720 /* Loop over the phandles until all the requested entry is found */ 721 while (list < list_end) { 722 rc = -EINVAL; 723 count = 0; 724 725 /* 726 * If phandle is 0, then it is an empty entry with no 727 * arguments. Skip forward to the next entry. 728 */ 729 phandle = be32_to_cpup(list++); 730 if (phandle) { 731 /* 732 * Find the provider node and parse the #*-cells 733 * property to determine the argument length. 734 * 735 * This is not needed if the cell count is hard-coded 736 * (i.e. cells_name not set, but cell_count is set), 737 * except when we're going to return the found node 738 * below. 739 */ 740 if (cells_name || cur_index == index) { 741 node = fdt_node_offset_by_phandle(blob, 742 phandle); 743 if (!node) { 744 debug("%s: could not find phandle\n", 745 fdt_get_name(blob, src_node, 746 NULL)); 747 goto err; 748 } 749 } 750 751 if (cells_name) { 752 count = fdtdec_get_int(blob, node, cells_name, 753 -1); 754 if (count == -1) { 755 debug("%s: could not get %s for %s\n", 756 fdt_get_name(blob, src_node, 757 NULL), 758 cells_name, 759 fdt_get_name(blob, node, 760 NULL)); 761 goto err; 762 } 763 } else { 764 count = cell_count; 765 } 766 767 /* 768 * Make sure that the arguments actually fit in the 769 * remaining property data length 770 */ 771 if (list + count > list_end) { 772 debug("%s: arguments longer than property\n", 773 fdt_get_name(blob, src_node, NULL)); 774 goto err; 775 } 776 } 777 778 /* 779 * All of the error cases above bail out of the loop, so at 780 * this point, the parsing is successful. If the requested 781 * index matches, then fill the out_args structure and return, 782 * or return -ENOENT for an empty entry. 783 */ 784 rc = -ENOENT; 785 if (cur_index == index) { 786 if (!phandle) 787 goto err; 788 789 if (out_args) { 790 int i; 791 792 if (count > MAX_PHANDLE_ARGS) { 793 debug("%s: too many arguments %d\n", 794 fdt_get_name(blob, src_node, 795 NULL), count); 796 count = MAX_PHANDLE_ARGS; 797 } 798 out_args->node = node; 799 out_args->args_count = count; 800 for (i = 0; i < count; i++) { 801 out_args->args[i] = 802 be32_to_cpup(list++); 803 } 804 } 805 806 /* Found it! return success */ 807 return 0; 808 } 809 810 node = -1; 811 list += count; 812 cur_index++; 813 } 814 815 /* 816 * Result will be one of: 817 * -ENOENT : index is for empty phandle 818 * -EINVAL : parsing error on data 819 * [1..n] : Number of phandle (count mode; when index = -1) 820 */ 821 rc = index < 0 ? cur_index : -ENOENT; 822 err: 823 return rc; 824 } 825 826 int fdtdec_get_child_count(const void *blob, int node) 827 { 828 int subnode; 829 int num = 0; 830 831 fdt_for_each_subnode(blob, subnode, node) 832 num++; 833 834 return num; 835 } 836 837 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 838 u8 *array, int count) 839 { 840 const u8 *cell; 841 int err; 842 843 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 844 if (!err) 845 memcpy(array, cell, count); 846 return err; 847 } 848 849 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 850 const char *prop_name, int count) 851 { 852 const u8 *cell; 853 int err; 854 855 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 856 if (err) 857 return NULL; 858 return cell; 859 } 860 861 int fdtdec_get_config_int(const void *blob, const char *prop_name, 862 int default_val) 863 { 864 int config_node; 865 866 debug("%s: %s\n", __func__, prop_name); 867 config_node = fdt_path_offset(blob, "/config"); 868 if (config_node < 0) 869 return default_val; 870 return fdtdec_get_int(blob, config_node, prop_name, default_val); 871 } 872 873 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 874 { 875 int config_node; 876 const void *prop; 877 878 debug("%s: %s\n", __func__, prop_name); 879 config_node = fdt_path_offset(blob, "/config"); 880 if (config_node < 0) 881 return 0; 882 prop = fdt_get_property(blob, config_node, prop_name, NULL); 883 884 return prop != NULL; 885 } 886 887 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 888 { 889 const char *nodep; 890 int nodeoffset; 891 int len; 892 893 debug("%s: %s\n", __func__, prop_name); 894 nodeoffset = fdt_path_offset(blob, "/config"); 895 if (nodeoffset < 0) 896 return NULL; 897 898 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 899 if (!nodep) 900 return NULL; 901 902 return (char *)nodep; 903 } 904 905 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 906 fdt_addr_t *basep, fdt_size_t *sizep) 907 { 908 const fdt_addr_t *cell; 909 int len; 910 911 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 912 prop_name); 913 cell = fdt_getprop(blob, node, prop_name, &len); 914 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 915 debug("cell=%p, len=%d\n", cell, len); 916 return -1; 917 } 918 919 *basep = fdt_addr_to_cpu(*cell); 920 *sizep = fdt_size_to_cpu(cell[1]); 921 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 922 (ulong)*sizep); 923 924 return 0; 925 } 926 927 /** 928 * Read a flash entry from the fdt 929 * 930 * @param blob FDT blob 931 * @param node Offset of node to read 932 * @param name Name of node being read 933 * @param entry Place to put offset and size of this node 934 * @return 0 if ok, -ve on error 935 */ 936 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 937 struct fmap_entry *entry) 938 { 939 const char *prop; 940 u32 reg[2]; 941 942 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 943 debug("Node '%s' has bad/missing 'reg' property\n", name); 944 return -FDT_ERR_NOTFOUND; 945 } 946 entry->offset = reg[0]; 947 entry->length = reg[1]; 948 entry->used = fdtdec_get_int(blob, node, "used", entry->length); 949 prop = fdt_getprop(blob, node, "compress", NULL); 950 entry->compress_algo = prop && !strcmp(prop, "lzo") ? 951 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; 952 prop = fdt_getprop(blob, node, "hash", &entry->hash_size); 953 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; 954 entry->hash = (uint8_t *)prop; 955 956 return 0; 957 } 958 959 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 960 { 961 u64 number = 0; 962 963 while (cells--) 964 number = (number << 32) | fdt32_to_cpu(*ptr++); 965 966 return number; 967 } 968 969 int fdt_get_resource(const void *fdt, int node, const char *property, 970 unsigned int index, struct fdt_resource *res) 971 { 972 const fdt32_t *ptr, *end; 973 int na, ns, len, parent; 974 unsigned int i = 0; 975 976 parent = fdt_parent_offset(fdt, node); 977 if (parent < 0) 978 return parent; 979 980 na = fdt_address_cells(fdt, parent); 981 ns = fdt_size_cells(fdt, parent); 982 983 ptr = fdt_getprop(fdt, node, property, &len); 984 if (!ptr) 985 return len; 986 987 end = ptr + len / sizeof(*ptr); 988 989 while (ptr + na + ns <= end) { 990 if (i == index) { 991 res->start = res->end = fdtdec_get_number(ptr, na); 992 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 993 return 0; 994 } 995 996 ptr += na + ns; 997 i++; 998 } 999 1000 return -FDT_ERR_NOTFOUND; 1001 } 1002 1003 int fdt_get_named_resource(const void *fdt, int node, const char *property, 1004 const char *prop_names, const char *name, 1005 struct fdt_resource *res) 1006 { 1007 int index; 1008 1009 index = fdt_find_string(fdt, node, prop_names, name); 1010 if (index < 0) 1011 return index; 1012 1013 return fdt_get_resource(fdt, node, property, index, res); 1014 } 1015 1016 int fdtdec_decode_memory_region(const void *blob, int config_node, 1017 const char *mem_type, const char *suffix, 1018 fdt_addr_t *basep, fdt_size_t *sizep) 1019 { 1020 char prop_name[50]; 1021 const char *mem; 1022 fdt_size_t size, offset_size; 1023 fdt_addr_t base, offset; 1024 int node; 1025 1026 if (config_node == -1) { 1027 config_node = fdt_path_offset(blob, "/config"); 1028 if (config_node < 0) { 1029 debug("%s: Cannot find /config node\n", __func__); 1030 return -ENOENT; 1031 } 1032 } 1033 if (!suffix) 1034 suffix = ""; 1035 1036 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 1037 suffix); 1038 mem = fdt_getprop(blob, config_node, prop_name, NULL); 1039 if (!mem) { 1040 debug("%s: No memory type for '%s', using /memory\n", __func__, 1041 prop_name); 1042 mem = "/memory"; 1043 } 1044 1045 node = fdt_path_offset(blob, mem); 1046 if (node < 0) { 1047 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 1048 fdt_strerror(node)); 1049 return -ENOENT; 1050 } 1051 1052 /* 1053 * Not strictly correct - the memory may have multiple banks. We just 1054 * use the first 1055 */ 1056 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 1057 debug("%s: Failed to decode memory region %s\n", __func__, 1058 mem); 1059 return -EINVAL; 1060 } 1061 1062 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 1063 suffix); 1064 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 1065 &offset_size)) { 1066 debug("%s: Failed to decode memory region '%s'\n", __func__, 1067 prop_name); 1068 return -EINVAL; 1069 } 1070 1071 *basep = base + offset; 1072 *sizep = offset_size; 1073 1074 return 0; 1075 } 1076 1077 static int decode_timing_property(const void *blob, int node, const char *name, 1078 struct timing_entry *result) 1079 { 1080 int length, ret = 0; 1081 const u32 *prop; 1082 1083 prop = fdt_getprop(blob, node, name, &length); 1084 if (!prop) { 1085 debug("%s: could not find property %s\n", 1086 fdt_get_name(blob, node, NULL), name); 1087 return length; 1088 } 1089 1090 if (length == sizeof(u32)) { 1091 result->typ = fdtdec_get_int(blob, node, name, 0); 1092 result->min = result->typ; 1093 result->max = result->typ; 1094 } else { 1095 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3); 1096 } 1097 1098 return ret; 1099 } 1100 1101 int fdtdec_decode_display_timing(const void *blob, int parent, int index, 1102 struct display_timing *dt) 1103 { 1104 int i, node, timings_node; 1105 u32 val = 0; 1106 int ret = 0; 1107 1108 timings_node = fdt_subnode_offset(blob, parent, "display-timings"); 1109 if (timings_node < 0) 1110 return timings_node; 1111 1112 for (i = 0, node = fdt_first_subnode(blob, timings_node); 1113 node > 0 && i != index; 1114 node = fdt_next_subnode(blob, node)) 1115 i++; 1116 1117 if (node < 0) 1118 return node; 1119 1120 memset(dt, 0, sizeof(*dt)); 1121 1122 ret |= decode_timing_property(blob, node, "hback-porch", 1123 &dt->hback_porch); 1124 ret |= decode_timing_property(blob, node, "hfront-porch", 1125 &dt->hfront_porch); 1126 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive); 1127 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len); 1128 ret |= decode_timing_property(blob, node, "vback-porch", 1129 &dt->vback_porch); 1130 ret |= decode_timing_property(blob, node, "vfront-porch", 1131 &dt->vfront_porch); 1132 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive); 1133 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len); 1134 ret |= decode_timing_property(blob, node, "clock-frequency", 1135 &dt->pixelclock); 1136 1137 dt->flags = 0; 1138 val = fdtdec_get_int(blob, node, "vsync-active", -1); 1139 if (val != -1) { 1140 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : 1141 DISPLAY_FLAGS_VSYNC_LOW; 1142 } 1143 val = fdtdec_get_int(blob, node, "hsync-active", -1); 1144 if (val != -1) { 1145 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : 1146 DISPLAY_FLAGS_HSYNC_LOW; 1147 } 1148 val = fdtdec_get_int(blob, node, "de-active", -1); 1149 if (val != -1) { 1150 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : 1151 DISPLAY_FLAGS_DE_LOW; 1152 } 1153 val = fdtdec_get_int(blob, node, "pixelclk-active", -1); 1154 if (val != -1) { 1155 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : 1156 DISPLAY_FLAGS_PIXDATA_NEGEDGE; 1157 } 1158 1159 if (fdtdec_get_bool(blob, node, "interlaced")) 1160 dt->flags |= DISPLAY_FLAGS_INTERLACED; 1161 if (fdtdec_get_bool(blob, node, "doublescan")) 1162 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; 1163 if (fdtdec_get_bool(blob, node, "doubleclk")) 1164 dt->flags |= DISPLAY_FLAGS_DOUBLECLK; 1165 1166 return ret; 1167 } 1168 1169 int fdtdec_setup(void) 1170 { 1171 #if CONFIG_IS_ENABLED(OF_CONTROL) 1172 # ifdef CONFIG_OF_EMBED 1173 /* Get a pointer to the FDT */ 1174 gd->fdt_blob = __dtb_dt_begin; 1175 # elif defined CONFIG_OF_SEPARATE 1176 # ifdef CONFIG_SPL_BUILD 1177 /* FDT is at end of BSS unless it is in a different memory region */ 1178 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS)) 1179 gd->fdt_blob = (ulong *)&_image_binary_end; 1180 else 1181 gd->fdt_blob = (ulong *)&__bss_end; 1182 # else 1183 /* FDT is at end of image */ 1184 gd->fdt_blob = (ulong *)&_end; 1185 # endif 1186 # elif defined(CONFIG_OF_HOSTFILE) 1187 if (sandbox_read_fdt_from_file()) { 1188 puts("Failed to read control FDT\n"); 1189 return -1; 1190 } 1191 # endif 1192 # ifndef CONFIG_SPL_BUILD 1193 /* Allow the early environment to override the fdt address */ 1194 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, 1195 (uintptr_t)gd->fdt_blob); 1196 # endif 1197 #endif 1198 return fdtdec_prepare_fdt(); 1199 } 1200 1201 #endif /* !USE_HOSTCC */ 1202