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_TEGRA20_PWM, "nvidia,tegra20-pwm"), 30 COMPAT(NVIDIA_TEGRA124_DC, "nvidia,tegra124-dc"), 31 COMPAT(NVIDIA_TEGRA124_SOR, "nvidia,tegra124-sor"), 32 COMPAT(NVIDIA_TEGRA124_PMC, "nvidia,tegra124-pmc"), 33 COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"), 34 COMPAT(NVIDIA_TEGRA210_SDMMC, "nvidia,tegra210-sdhci"), 35 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"), 36 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"), 37 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"), 38 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"), 39 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"), 40 COMPAT(SMSC_LAN9215, "smsc,lan9215"), 41 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), 42 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), 43 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), 44 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), 45 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"), 46 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), 47 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"), 48 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), 49 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"), 50 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"), 51 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"), 52 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), 53 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), 54 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"), 55 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"), 56 COMPAT(GENERIC_SPI_FLASH, "spi-flash"), 57 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), 58 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), 59 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"), 60 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), 61 COMPAT(INTEL_MICROCODE, "intel,microcode"), 62 COMPAT(MEMORY_SPD, "memory-spd"), 63 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"), 64 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"), 65 COMPAT(INTEL_GMA, "intel,gma"), 66 COMPAT(AMS_AS3722, "ams,as3722"), 67 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"), 68 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"), 69 COMPAT(INTEL_X86_PINCTRL, "intel,x86-pinctrl"), 70 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"), 71 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"), 72 COMPAT(COMPAT_INTEL_IRQ_ROUTER, "intel,irq-router"), 73 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"), 74 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"), 75 COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"), 76 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"), 77 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"), 78 }; 79 80 const char *fdtdec_get_compatible(enum fdt_compat_id id) 81 { 82 /* We allow reading of the 'unknown' ID for testing purposes */ 83 assert(id >= 0 && id < COMPAT_COUNT); 84 return compat_names[id]; 85 } 86 87 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node, 88 const char *prop_name, int index, int na, int ns, 89 fdt_size_t *sizep) 90 { 91 const fdt32_t *prop, *prop_end; 92 const fdt32_t *prop_addr, *prop_size, *prop_after_size; 93 int len; 94 fdt_addr_t addr; 95 96 debug("%s: %s: ", __func__, prop_name); 97 98 if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) { 99 debug("(na too large for fdt_addr_t type)\n"); 100 return FDT_ADDR_T_NONE; 101 } 102 103 if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) { 104 debug("(ns too large for fdt_size_t type)\n"); 105 return FDT_ADDR_T_NONE; 106 } 107 108 prop = fdt_getprop(blob, node, prop_name, &len); 109 if (!prop) { 110 debug("(not found)\n"); 111 return FDT_ADDR_T_NONE; 112 } 113 prop_end = prop + (len / sizeof(*prop)); 114 115 prop_addr = prop + (index * (na + ns)); 116 prop_size = prop_addr + na; 117 prop_after_size = prop_size + ns; 118 if (prop_after_size > prop_end) { 119 debug("(not enough data: expected >= %d cells, got %d cells)\n", 120 (u32)(prop_after_size - prop), ((u32)(prop_end - prop))); 121 return FDT_ADDR_T_NONE; 122 } 123 124 addr = fdtdec_get_number(prop_addr, na); 125 126 if (sizep) { 127 *sizep = fdtdec_get_number(prop_size, ns); 128 debug("addr=%08llx, size=%llx\n", (u64)addr, (u64)*sizep); 129 } else { 130 debug("addr=%08llx\n", (u64)addr); 131 } 132 133 return addr; 134 } 135 136 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent, 137 int node, const char *prop_name, int index, fdt_size_t *sizep) 138 { 139 int na, ns; 140 141 debug("%s: ", __func__); 142 143 na = fdt_address_cells(blob, parent); 144 if (na < 1) { 145 debug("(bad #address-cells)\n"); 146 return FDT_ADDR_T_NONE; 147 } 148 149 ns = fdt_size_cells(blob, parent); 150 if (ns < 0) { 151 debug("(bad #size-cells)\n"); 152 return FDT_ADDR_T_NONE; 153 } 154 155 debug("na=%d, ns=%d, ", na, ns); 156 157 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na, 158 ns, sizep); 159 } 160 161 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node, 162 const char *prop_name, int index, fdt_size_t *sizep) 163 { 164 int parent; 165 166 debug("%s: ", __func__); 167 168 parent = fdt_parent_offset(blob, node); 169 if (parent < 0) { 170 debug("(no parent found)\n"); 171 return FDT_ADDR_T_NONE; 172 } 173 174 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name, 175 index, sizep); 176 } 177 178 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 179 const char *prop_name, fdt_size_t *sizep) 180 { 181 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0; 182 183 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0, 184 sizeof(fdt_addr_t) / sizeof(fdt32_t), 185 ns, sizep); 186 } 187 188 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 189 const char *prop_name) 190 { 191 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 192 } 193 194 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI) 195 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 196 const char *prop_name, struct fdt_pci_addr *addr) 197 { 198 const u32 *cell; 199 int len; 200 int ret = -ENOENT; 201 202 debug("%s: %s: ", __func__, prop_name); 203 204 /* 205 * If we follow the pci bus bindings strictly, we should check 206 * the value of the node's parent node's #address-cells and 207 * #size-cells. They need to be 3 and 2 accordingly. However, 208 * for simplicity we skip the check here. 209 */ 210 cell = fdt_getprop(blob, node, prop_name, &len); 211 if (!cell) 212 goto fail; 213 214 if ((len % FDT_PCI_REG_SIZE) == 0) { 215 int num = len / FDT_PCI_REG_SIZE; 216 int i; 217 218 for (i = 0; i < num; i++) { 219 debug("pci address #%d: %08lx %08lx %08lx\n", i, 220 (ulong)fdt32_to_cpu(cell[0]), 221 (ulong)fdt32_to_cpu(cell[1]), 222 (ulong)fdt32_to_cpu(cell[2])); 223 if ((fdt32_to_cpu(*cell) & type) == type) { 224 addr->phys_hi = fdt32_to_cpu(cell[0]); 225 addr->phys_mid = fdt32_to_cpu(cell[1]); 226 addr->phys_lo = fdt32_to_cpu(cell[1]); 227 break; 228 } else { 229 cell += (FDT_PCI_ADDR_CELLS + 230 FDT_PCI_SIZE_CELLS); 231 } 232 } 233 234 if (i == num) { 235 ret = -ENXIO; 236 goto fail; 237 } 238 239 return 0; 240 } else { 241 ret = -EINVAL; 242 } 243 244 fail: 245 debug("(not found)\n"); 246 return ret; 247 } 248 249 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 250 { 251 const char *list, *end; 252 int len; 253 254 list = fdt_getprop(blob, node, "compatible", &len); 255 if (!list) 256 return -ENOENT; 257 258 end = list + len; 259 while (list < end) { 260 char *s; 261 262 len = strlen(list); 263 if (len >= strlen("pciVVVV,DDDD")) { 264 s = strstr(list, "pci"); 265 266 /* 267 * check if the string is something like pciVVVV,DDDD.RR 268 * or just pciVVVV,DDDD 269 */ 270 if (s && s[7] == ',' && 271 (s[12] == '.' || s[12] == 0)) { 272 s += 3; 273 *vendor = simple_strtol(s, NULL, 16); 274 275 s += 5; 276 *device = simple_strtol(s, NULL, 16); 277 278 return 0; 279 } 280 } 281 list += (len + 1); 282 } 283 284 return -ENOENT; 285 } 286 287 int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr, 288 u32 *bar) 289 { 290 int barnum; 291 292 /* extract the bar number from fdt_pci_addr */ 293 barnum = addr->phys_hi & 0xff; 294 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) 295 return -EINVAL; 296 297 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; 298 *bar = dm_pci_read_bar32(dev, barnum); 299 300 return 0; 301 } 302 #endif 303 304 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 305 uint64_t default_val) 306 { 307 const uint64_t *cell64; 308 int length; 309 310 cell64 = fdt_getprop(blob, node, prop_name, &length); 311 if (!cell64 || length < sizeof(*cell64)) 312 return default_val; 313 314 return fdt64_to_cpu(*cell64); 315 } 316 317 int fdtdec_get_is_enabled(const void *blob, int node) 318 { 319 const char *cell; 320 321 /* 322 * It should say "okay", so only allow that. Some fdts use "ok" but 323 * this is a bug. Please fix your device tree source file. See here 324 * for discussion: 325 * 326 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 327 */ 328 cell = fdt_getprop(blob, node, "status", NULL); 329 if (cell) 330 return 0 == strcmp(cell, "okay"); 331 return 1; 332 } 333 334 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 335 { 336 enum fdt_compat_id id; 337 338 /* Search our drivers */ 339 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 340 if (0 == fdt_node_check_compatible(blob, node, 341 compat_names[id])) 342 return id; 343 return COMPAT_UNKNOWN; 344 } 345 346 int fdtdec_next_compatible(const void *blob, int node, 347 enum fdt_compat_id id) 348 { 349 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 350 } 351 352 int fdtdec_next_compatible_subnode(const void *blob, int node, 353 enum fdt_compat_id id, int *depthp) 354 { 355 do { 356 node = fdt_next_node(blob, node, depthp); 357 } while (*depthp > 1); 358 359 /* If this is a direct subnode, and compatible, return it */ 360 if (*depthp == 1 && 0 == fdt_node_check_compatible( 361 blob, node, compat_names[id])) 362 return node; 363 364 return -FDT_ERR_NOTFOUND; 365 } 366 367 int fdtdec_next_alias(const void *blob, const char *name, 368 enum fdt_compat_id id, int *upto) 369 { 370 #define MAX_STR_LEN 20 371 char str[MAX_STR_LEN + 20]; 372 int node, err; 373 374 /* snprintf() is not available */ 375 assert(strlen(name) < MAX_STR_LEN); 376 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 377 node = fdt_path_offset(blob, str); 378 if (node < 0) 379 return node; 380 err = fdt_node_check_compatible(blob, node, compat_names[id]); 381 if (err < 0) 382 return err; 383 if (err) 384 return -FDT_ERR_NOTFOUND; 385 (*upto)++; 386 return node; 387 } 388 389 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 390 enum fdt_compat_id id, int *node_list, int maxcount) 391 { 392 memset(node_list, '\0', sizeof(*node_list) * maxcount); 393 394 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 395 } 396 397 /* TODO: Can we tighten this code up a little? */ 398 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 399 enum fdt_compat_id id, int *node_list, int maxcount) 400 { 401 int name_len = strlen(name); 402 int nodes[maxcount]; 403 int num_found = 0; 404 int offset, node; 405 int alias_node; 406 int count; 407 int i, j; 408 409 /* find the alias node if present */ 410 alias_node = fdt_path_offset(blob, "/aliases"); 411 412 /* 413 * start with nothing, and we can assume that the root node can't 414 * match 415 */ 416 memset(nodes, '\0', sizeof(nodes)); 417 418 /* First find all the compatible nodes */ 419 for (node = count = 0; node >= 0 && count < maxcount;) { 420 node = fdtdec_next_compatible(blob, node, id); 421 if (node >= 0) 422 nodes[count++] = node; 423 } 424 if (node >= 0) 425 debug("%s: warning: maxcount exceeded with alias '%s'\n", 426 __func__, name); 427 428 /* Now find all the aliases */ 429 for (offset = fdt_first_property_offset(blob, alias_node); 430 offset > 0; 431 offset = fdt_next_property_offset(blob, offset)) { 432 const struct fdt_property *prop; 433 const char *path; 434 int number; 435 int found; 436 437 node = 0; 438 prop = fdt_get_property_by_offset(blob, offset, NULL); 439 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 440 if (prop->len && 0 == strncmp(path, name, name_len)) 441 node = fdt_path_offset(blob, prop->data); 442 if (node <= 0) 443 continue; 444 445 /* Get the alias number */ 446 number = simple_strtoul(path + name_len, NULL, 10); 447 if (number < 0 || number >= maxcount) { 448 debug("%s: warning: alias '%s' is out of range\n", 449 __func__, path); 450 continue; 451 } 452 453 /* Make sure the node we found is actually in our list! */ 454 found = -1; 455 for (j = 0; j < count; j++) 456 if (nodes[j] == node) { 457 found = j; 458 break; 459 } 460 461 if (found == -1) { 462 debug("%s: warning: alias '%s' points to a node " 463 "'%s' that is missing or is not compatible " 464 " with '%s'\n", __func__, path, 465 fdt_get_name(blob, node, NULL), 466 compat_names[id]); 467 continue; 468 } 469 470 /* 471 * Add this node to our list in the right place, and mark 472 * it as done. 473 */ 474 if (fdtdec_get_is_enabled(blob, node)) { 475 if (node_list[number]) { 476 debug("%s: warning: alias '%s' requires that " 477 "a node be placed in the list in a " 478 "position which is already filled by " 479 "node '%s'\n", __func__, path, 480 fdt_get_name(blob, node, NULL)); 481 continue; 482 } 483 node_list[number] = node; 484 if (number >= num_found) 485 num_found = number + 1; 486 } 487 nodes[found] = 0; 488 } 489 490 /* Add any nodes not mentioned by an alias */ 491 for (i = j = 0; i < maxcount; i++) { 492 if (!node_list[i]) { 493 for (; j < maxcount; j++) 494 if (nodes[j] && 495 fdtdec_get_is_enabled(blob, nodes[j])) 496 break; 497 498 /* Have we run out of nodes to add? */ 499 if (j == maxcount) 500 break; 501 502 assert(!node_list[i]); 503 node_list[i] = nodes[j++]; 504 if (i >= num_found) 505 num_found = i + 1; 506 } 507 } 508 509 return num_found; 510 } 511 512 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 513 int *seqp) 514 { 515 int base_len = strlen(base); 516 const char *find_name; 517 int find_namelen; 518 int prop_offset; 519 int aliases; 520 521 find_name = fdt_get_name(blob, offset, &find_namelen); 522 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 523 524 aliases = fdt_path_offset(blob, "/aliases"); 525 for (prop_offset = fdt_first_property_offset(blob, aliases); 526 prop_offset > 0; 527 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 528 const char *prop; 529 const char *name; 530 const char *slash; 531 int len, val; 532 533 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 534 debug(" - %s, %s\n", name, prop); 535 if (len < find_namelen || *prop != '/' || prop[len - 1] || 536 strncmp(name, base, base_len)) 537 continue; 538 539 slash = strrchr(prop, '/'); 540 if (strcmp(slash + 1, find_name)) 541 continue; 542 val = trailing_strtol(name); 543 if (val != -1) { 544 *seqp = val; 545 debug("Found seq %d\n", *seqp); 546 return 0; 547 } 548 } 549 550 debug("Not found\n"); 551 return -ENOENT; 552 } 553 554 const char *fdtdec_get_chosen_prop(const void *blob, const char *name) 555 { 556 int chosen_node; 557 558 if (!blob) 559 return NULL; 560 chosen_node = fdt_path_offset(blob, "/chosen"); 561 return fdt_getprop(blob, chosen_node, name, NULL); 562 } 563 564 int fdtdec_get_chosen_node(const void *blob, const char *name) 565 { 566 const char *prop; 567 568 prop = fdtdec_get_chosen_prop(blob, name); 569 if (!prop) 570 return -FDT_ERR_NOTFOUND; 571 return fdt_path_offset(blob, prop); 572 } 573 574 int fdtdec_check_fdt(void) 575 { 576 /* 577 * We must have an FDT, but we cannot panic() yet since the console 578 * is not ready. So for now, just assert(). Boards which need an early 579 * FDT (prior to console ready) will need to make their own 580 * arrangements and do their own checks. 581 */ 582 assert(!fdtdec_prepare_fdt()); 583 return 0; 584 } 585 586 /* 587 * This function is a little odd in that it accesses global data. At some 588 * point if the architecture board.c files merge this will make more sense. 589 * Even now, it is common code. 590 */ 591 int fdtdec_prepare_fdt(void) 592 { 593 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 594 fdt_check_header(gd->fdt_blob)) { 595 #ifdef CONFIG_SPL_BUILD 596 puts("Missing DTB\n"); 597 #else 598 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"); 599 # ifdef DEBUG 600 if (gd->fdt_blob) { 601 printf("fdt_blob=%p\n", gd->fdt_blob); 602 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4, 603 32, 0); 604 } 605 # endif 606 #endif 607 return -1; 608 } 609 return 0; 610 } 611 612 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 613 { 614 const u32 *phandle; 615 int lookup; 616 617 debug("%s: %s\n", __func__, prop_name); 618 phandle = fdt_getprop(blob, node, prop_name, NULL); 619 if (!phandle) 620 return -FDT_ERR_NOTFOUND; 621 622 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 623 return lookup; 624 } 625 626 /** 627 * Look up a property in a node and check that it has a minimum length. 628 * 629 * @param blob FDT blob 630 * @param node node to examine 631 * @param prop_name name of property to find 632 * @param min_len minimum property length in bytes 633 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 634 found, or -FDT_ERR_BADLAYOUT if not enough data 635 * @return pointer to cell, which is only valid if err == 0 636 */ 637 static const void *get_prop_check_min_len(const void *blob, int node, 638 const char *prop_name, int min_len, int *err) 639 { 640 const void *cell; 641 int len; 642 643 debug("%s: %s\n", __func__, prop_name); 644 cell = fdt_getprop(blob, node, prop_name, &len); 645 if (!cell) 646 *err = -FDT_ERR_NOTFOUND; 647 else if (len < min_len) 648 *err = -FDT_ERR_BADLAYOUT; 649 else 650 *err = 0; 651 return cell; 652 } 653 654 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 655 u32 *array, int count) 656 { 657 const u32 *cell; 658 int i, err = 0; 659 660 debug("%s: %s\n", __func__, prop_name); 661 cell = get_prop_check_min_len(blob, node, prop_name, 662 sizeof(u32) * count, &err); 663 if (!err) { 664 for (i = 0; i < count; i++) 665 array[i] = fdt32_to_cpu(cell[i]); 666 } 667 return err; 668 } 669 670 int fdtdec_get_int_array_count(const void *blob, int node, 671 const char *prop_name, u32 *array, int count) 672 { 673 const u32 *cell; 674 int len, elems; 675 int i; 676 677 debug("%s: %s\n", __func__, prop_name); 678 cell = fdt_getprop(blob, node, prop_name, &len); 679 if (!cell) 680 return -FDT_ERR_NOTFOUND; 681 elems = len / sizeof(u32); 682 if (count > elems) 683 count = elems; 684 for (i = 0; i < count; i++) 685 array[i] = fdt32_to_cpu(cell[i]); 686 687 return count; 688 } 689 690 const u32 *fdtdec_locate_array(const void *blob, int node, 691 const char *prop_name, int count) 692 { 693 const u32 *cell; 694 int err; 695 696 cell = get_prop_check_min_len(blob, node, prop_name, 697 sizeof(u32) * count, &err); 698 return err ? NULL : cell; 699 } 700 701 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 702 { 703 const s32 *cell; 704 int len; 705 706 debug("%s: %s\n", __func__, prop_name); 707 cell = fdt_getprop(blob, node, prop_name, &len); 708 return cell != NULL; 709 } 710 711 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 712 const char *list_name, 713 const char *cells_name, 714 int cell_count, int index, 715 struct fdtdec_phandle_args *out_args) 716 { 717 const __be32 *list, *list_end; 718 int rc = 0, size, cur_index = 0; 719 uint32_t count = 0; 720 int node = -1; 721 int phandle; 722 723 /* Retrieve the phandle list property */ 724 list = fdt_getprop(blob, src_node, list_name, &size); 725 if (!list) 726 return -ENOENT; 727 list_end = list + size / sizeof(*list); 728 729 /* Loop over the phandles until all the requested entry is found */ 730 while (list < list_end) { 731 rc = -EINVAL; 732 count = 0; 733 734 /* 735 * If phandle is 0, then it is an empty entry with no 736 * arguments. Skip forward to the next entry. 737 */ 738 phandle = be32_to_cpup(list++); 739 if (phandle) { 740 /* 741 * Find the provider node and parse the #*-cells 742 * property to determine the argument length. 743 * 744 * This is not needed if the cell count is hard-coded 745 * (i.e. cells_name not set, but cell_count is set), 746 * except when we're going to return the found node 747 * below. 748 */ 749 if (cells_name || cur_index == index) { 750 node = fdt_node_offset_by_phandle(blob, 751 phandle); 752 if (!node) { 753 debug("%s: could not find phandle\n", 754 fdt_get_name(blob, src_node, 755 NULL)); 756 goto err; 757 } 758 } 759 760 if (cells_name) { 761 count = fdtdec_get_int(blob, node, cells_name, 762 -1); 763 if (count == -1) { 764 debug("%s: could not get %s for %s\n", 765 fdt_get_name(blob, src_node, 766 NULL), 767 cells_name, 768 fdt_get_name(blob, node, 769 NULL)); 770 goto err; 771 } 772 } else { 773 count = cell_count; 774 } 775 776 /* 777 * Make sure that the arguments actually fit in the 778 * remaining property data length 779 */ 780 if (list + count > list_end) { 781 debug("%s: arguments longer than property\n", 782 fdt_get_name(blob, src_node, NULL)); 783 goto err; 784 } 785 } 786 787 /* 788 * All of the error cases above bail out of the loop, so at 789 * this point, the parsing is successful. If the requested 790 * index matches, then fill the out_args structure and return, 791 * or return -ENOENT for an empty entry. 792 */ 793 rc = -ENOENT; 794 if (cur_index == index) { 795 if (!phandle) 796 goto err; 797 798 if (out_args) { 799 int i; 800 801 if (count > MAX_PHANDLE_ARGS) { 802 debug("%s: too many arguments %d\n", 803 fdt_get_name(blob, src_node, 804 NULL), count); 805 count = MAX_PHANDLE_ARGS; 806 } 807 out_args->node = node; 808 out_args->args_count = count; 809 for (i = 0; i < count; i++) { 810 out_args->args[i] = 811 be32_to_cpup(list++); 812 } 813 } 814 815 /* Found it! return success */ 816 return 0; 817 } 818 819 node = -1; 820 list += count; 821 cur_index++; 822 } 823 824 /* 825 * Result will be one of: 826 * -ENOENT : index is for empty phandle 827 * -EINVAL : parsing error on data 828 * [1..n] : Number of phandle (count mode; when index = -1) 829 */ 830 rc = index < 0 ? cur_index : -ENOENT; 831 err: 832 return rc; 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 0; 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