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(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), 60 COMPAT(INTEL_MICROCODE, "intel,microcode"), 61 COMPAT(MEMORY_SPD, "memory-spd"), 62 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"), 63 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"), 64 COMPAT(INTEL_GMA, "intel,gma"), 65 COMPAT(AMS_AS3722, "ams,as3722"), 66 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"), 67 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"), 68 COMPAT(INTEL_X86_PINCTRL, "intel,x86-pinctrl"), 69 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"), 70 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"), 71 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"), 72 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"), 73 COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"), 74 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"), 75 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"), 76 COMPAT(COMPAT_INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"), 77 }; 78 79 const char *fdtdec_get_compatible(enum fdt_compat_id id) 80 { 81 /* We allow reading of the 'unknown' ID for testing purposes */ 82 assert(id >= 0 && id < COMPAT_COUNT); 83 return compat_names[id]; 84 } 85 86 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node, 87 const char *prop_name, int index, int na, int ns, 88 fdt_size_t *sizep) 89 { 90 const fdt32_t *prop, *prop_end; 91 const fdt32_t *prop_addr, *prop_size, *prop_after_size; 92 int len; 93 fdt_addr_t addr; 94 95 debug("%s: %s: ", __func__, prop_name); 96 97 if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) { 98 debug("(na too large for fdt_addr_t type)\n"); 99 return FDT_ADDR_T_NONE; 100 } 101 102 if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) { 103 debug("(ns too large for fdt_size_t type)\n"); 104 return FDT_ADDR_T_NONE; 105 } 106 107 prop = fdt_getprop(blob, node, prop_name, &len); 108 if (!prop) { 109 debug("(not found)\n"); 110 return FDT_ADDR_T_NONE; 111 } 112 prop_end = prop + (len / sizeof(*prop)); 113 114 prop_addr = prop + (index * (na + ns)); 115 prop_size = prop_addr + na; 116 prop_after_size = prop_size + ns; 117 if (prop_after_size > prop_end) { 118 debug("(not enough data: expected >= %d cells, got %d cells)\n", 119 (u32)(prop_after_size - prop), ((u32)(prop_end - prop))); 120 return FDT_ADDR_T_NONE; 121 } 122 123 addr = fdtdec_get_number(prop_addr, na); 124 125 if (sizep) { 126 *sizep = fdtdec_get_number(prop_size, ns); 127 debug("addr=%08llx, size=%llx\n", (u64)addr, (u64)*sizep); 128 } else { 129 debug("addr=%08llx\n", (u64)addr); 130 } 131 132 return addr; 133 } 134 135 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent, 136 int node, const char *prop_name, int index, fdt_size_t *sizep) 137 { 138 int na, ns; 139 140 debug("%s: ", __func__); 141 142 na = fdt_address_cells(blob, parent); 143 if (na < 1) { 144 debug("(bad #address-cells)\n"); 145 return FDT_ADDR_T_NONE; 146 } 147 148 ns = fdt_size_cells(blob, parent); 149 if (ns < 0) { 150 debug("(bad #size-cells)\n"); 151 return FDT_ADDR_T_NONE; 152 } 153 154 debug("na=%d, ns=%d, ", na, ns); 155 156 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na, 157 ns, sizep); 158 } 159 160 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node, 161 const char *prop_name, int index, fdt_size_t *sizep) 162 { 163 int parent; 164 165 debug("%s: ", __func__); 166 167 parent = fdt_parent_offset(blob, node); 168 if (parent < 0) { 169 debug("(no parent found)\n"); 170 return FDT_ADDR_T_NONE; 171 } 172 173 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name, 174 index, sizep); 175 } 176 177 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 178 const char *prop_name, fdt_size_t *sizep) 179 { 180 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0; 181 182 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0, 183 sizeof(fdt_addr_t) / sizeof(fdt32_t), 184 ns, sizep); 185 } 186 187 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 188 const char *prop_name) 189 { 190 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 191 } 192 193 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI) 194 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 195 const char *prop_name, struct fdt_pci_addr *addr) 196 { 197 const u32 *cell; 198 int len; 199 int ret = -ENOENT; 200 201 debug("%s: %s: ", __func__, prop_name); 202 203 /* 204 * If we follow the pci bus bindings strictly, we should check 205 * the value of the node's parent node's #address-cells and 206 * #size-cells. They need to be 3 and 2 accordingly. However, 207 * for simplicity we skip the check here. 208 */ 209 cell = fdt_getprop(blob, node, prop_name, &len); 210 if (!cell) 211 goto fail; 212 213 if ((len % FDT_PCI_REG_SIZE) == 0) { 214 int num = len / FDT_PCI_REG_SIZE; 215 int i; 216 217 for (i = 0; i < num; i++) { 218 debug("pci address #%d: %08lx %08lx %08lx\n", i, 219 (ulong)fdt32_to_cpu(cell[0]), 220 (ulong)fdt32_to_cpu(cell[1]), 221 (ulong)fdt32_to_cpu(cell[2])); 222 if ((fdt32_to_cpu(*cell) & type) == type) { 223 addr->phys_hi = fdt32_to_cpu(cell[0]); 224 addr->phys_mid = fdt32_to_cpu(cell[1]); 225 addr->phys_lo = fdt32_to_cpu(cell[1]); 226 break; 227 } else { 228 cell += (FDT_PCI_ADDR_CELLS + 229 FDT_PCI_SIZE_CELLS); 230 } 231 } 232 233 if (i == num) { 234 ret = -ENXIO; 235 goto fail; 236 } 237 238 return 0; 239 } else { 240 ret = -EINVAL; 241 } 242 243 fail: 244 debug("(not found)\n"); 245 return ret; 246 } 247 248 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 249 { 250 const char *list, *end; 251 int len; 252 253 list = fdt_getprop(blob, node, "compatible", &len); 254 if (!list) 255 return -ENOENT; 256 257 end = list + len; 258 while (list < end) { 259 char *s; 260 261 len = strlen(list); 262 if (len >= strlen("pciVVVV,DDDD")) { 263 s = strstr(list, "pci"); 264 265 /* 266 * check if the string is something like pciVVVV,DDDD.RR 267 * or just pciVVVV,DDDD 268 */ 269 if (s && s[7] == ',' && 270 (s[12] == '.' || s[12] == 0)) { 271 s += 3; 272 *vendor = simple_strtol(s, NULL, 16); 273 274 s += 5; 275 *device = simple_strtol(s, NULL, 16); 276 277 return 0; 278 } 279 } 280 list += (len + 1); 281 } 282 283 return -ENOENT; 284 } 285 286 int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr, 287 u32 *bar) 288 { 289 int barnum; 290 291 /* extract the bar number from fdt_pci_addr */ 292 barnum = addr->phys_hi & 0xff; 293 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) 294 return -EINVAL; 295 296 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; 297 *bar = dm_pci_read_bar32(dev, barnum); 298 299 return 0; 300 } 301 #endif 302 303 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 304 uint64_t default_val) 305 { 306 const uint64_t *cell64; 307 int length; 308 309 cell64 = fdt_getprop(blob, node, prop_name, &length); 310 if (!cell64 || length < sizeof(*cell64)) 311 return default_val; 312 313 return fdt64_to_cpu(*cell64); 314 } 315 316 int fdtdec_get_is_enabled(const void *blob, int node) 317 { 318 const char *cell; 319 320 /* 321 * It should say "okay", so only allow that. Some fdts use "ok" but 322 * this is a bug. Please fix your device tree source file. See here 323 * for discussion: 324 * 325 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 326 */ 327 cell = fdt_getprop(blob, node, "status", NULL); 328 if (cell) 329 return 0 == strcmp(cell, "okay"); 330 return 1; 331 } 332 333 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 334 { 335 enum fdt_compat_id id; 336 337 /* Search our drivers */ 338 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 339 if (0 == fdt_node_check_compatible(blob, node, 340 compat_names[id])) 341 return id; 342 return COMPAT_UNKNOWN; 343 } 344 345 int fdtdec_next_compatible(const void *blob, int node, 346 enum fdt_compat_id id) 347 { 348 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 349 } 350 351 int fdtdec_next_compatible_subnode(const void *blob, int node, 352 enum fdt_compat_id id, int *depthp) 353 { 354 do { 355 node = fdt_next_node(blob, node, depthp); 356 } while (*depthp > 1); 357 358 /* If this is a direct subnode, and compatible, return it */ 359 if (*depthp == 1 && 0 == fdt_node_check_compatible( 360 blob, node, compat_names[id])) 361 return node; 362 363 return -FDT_ERR_NOTFOUND; 364 } 365 366 int fdtdec_next_alias(const void *blob, const char *name, 367 enum fdt_compat_id id, int *upto) 368 { 369 #define MAX_STR_LEN 20 370 char str[MAX_STR_LEN + 20]; 371 int node, err; 372 373 /* snprintf() is not available */ 374 assert(strlen(name) < MAX_STR_LEN); 375 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 376 node = fdt_path_offset(blob, str); 377 if (node < 0) 378 return node; 379 err = fdt_node_check_compatible(blob, node, compat_names[id]); 380 if (err < 0) 381 return err; 382 if (err) 383 return -FDT_ERR_NOTFOUND; 384 (*upto)++; 385 return node; 386 } 387 388 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 389 enum fdt_compat_id id, int *node_list, int maxcount) 390 { 391 memset(node_list, '\0', sizeof(*node_list) * maxcount); 392 393 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 394 } 395 396 /* TODO: Can we tighten this code up a little? */ 397 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 398 enum fdt_compat_id id, int *node_list, int maxcount) 399 { 400 int name_len = strlen(name); 401 int nodes[maxcount]; 402 int num_found = 0; 403 int offset, node; 404 int alias_node; 405 int count; 406 int i, j; 407 408 /* find the alias node if present */ 409 alias_node = fdt_path_offset(blob, "/aliases"); 410 411 /* 412 * start with nothing, and we can assume that the root node can't 413 * match 414 */ 415 memset(nodes, '\0', sizeof(nodes)); 416 417 /* First find all the compatible nodes */ 418 for (node = count = 0; node >= 0 && count < maxcount;) { 419 node = fdtdec_next_compatible(blob, node, id); 420 if (node >= 0) 421 nodes[count++] = node; 422 } 423 if (node >= 0) 424 debug("%s: warning: maxcount exceeded with alias '%s'\n", 425 __func__, name); 426 427 /* Now find all the aliases */ 428 for (offset = fdt_first_property_offset(blob, alias_node); 429 offset > 0; 430 offset = fdt_next_property_offset(blob, offset)) { 431 const struct fdt_property *prop; 432 const char *path; 433 int number; 434 int found; 435 436 node = 0; 437 prop = fdt_get_property_by_offset(blob, offset, NULL); 438 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 439 if (prop->len && 0 == strncmp(path, name, name_len)) 440 node = fdt_path_offset(blob, prop->data); 441 if (node <= 0) 442 continue; 443 444 /* Get the alias number */ 445 number = simple_strtoul(path + name_len, NULL, 10); 446 if (number < 0 || number >= maxcount) { 447 debug("%s: warning: alias '%s' is out of range\n", 448 __func__, path); 449 continue; 450 } 451 452 /* Make sure the node we found is actually in our list! */ 453 found = -1; 454 for (j = 0; j < count; j++) 455 if (nodes[j] == node) { 456 found = j; 457 break; 458 } 459 460 if (found == -1) { 461 debug("%s: warning: alias '%s' points to a node " 462 "'%s' that is missing or is not compatible " 463 " with '%s'\n", __func__, path, 464 fdt_get_name(blob, node, NULL), 465 compat_names[id]); 466 continue; 467 } 468 469 /* 470 * Add this node to our list in the right place, and mark 471 * it as done. 472 */ 473 if (fdtdec_get_is_enabled(blob, node)) { 474 if (node_list[number]) { 475 debug("%s: warning: alias '%s' requires that " 476 "a node be placed in the list in a " 477 "position which is already filled by " 478 "node '%s'\n", __func__, path, 479 fdt_get_name(blob, node, NULL)); 480 continue; 481 } 482 node_list[number] = node; 483 if (number >= num_found) 484 num_found = number + 1; 485 } 486 nodes[found] = 0; 487 } 488 489 /* Add any nodes not mentioned by an alias */ 490 for (i = j = 0; i < maxcount; i++) { 491 if (!node_list[i]) { 492 for (; j < maxcount; j++) 493 if (nodes[j] && 494 fdtdec_get_is_enabled(blob, nodes[j])) 495 break; 496 497 /* Have we run out of nodes to add? */ 498 if (j == maxcount) 499 break; 500 501 assert(!node_list[i]); 502 node_list[i] = nodes[j++]; 503 if (i >= num_found) 504 num_found = i + 1; 505 } 506 } 507 508 return num_found; 509 } 510 511 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 512 int *seqp) 513 { 514 int base_len = strlen(base); 515 const char *find_name; 516 int find_namelen; 517 int prop_offset; 518 int aliases; 519 520 find_name = fdt_get_name(blob, offset, &find_namelen); 521 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 522 523 aliases = fdt_path_offset(blob, "/aliases"); 524 for (prop_offset = fdt_first_property_offset(blob, aliases); 525 prop_offset > 0; 526 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 527 const char *prop; 528 const char *name; 529 const char *slash; 530 int len, val; 531 532 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 533 debug(" - %s, %s\n", name, prop); 534 if (len < find_namelen || *prop != '/' || prop[len - 1] || 535 strncmp(name, base, base_len)) 536 continue; 537 538 slash = strrchr(prop, '/'); 539 if (strcmp(slash + 1, find_name)) 540 continue; 541 val = trailing_strtol(name); 542 if (val != -1) { 543 *seqp = val; 544 debug("Found seq %d\n", *seqp); 545 return 0; 546 } 547 } 548 549 debug("Not found\n"); 550 return -ENOENT; 551 } 552 553 const char *fdtdec_get_chosen_prop(const void *blob, const char *name) 554 { 555 int chosen_node; 556 557 if (!blob) 558 return NULL; 559 chosen_node = fdt_path_offset(blob, "/chosen"); 560 return fdt_getprop(blob, chosen_node, name, NULL); 561 } 562 563 int fdtdec_get_chosen_node(const void *blob, const char *name) 564 { 565 const char *prop; 566 567 prop = fdtdec_get_chosen_prop(blob, name); 568 if (!prop) 569 return -FDT_ERR_NOTFOUND; 570 return fdt_path_offset(blob, prop); 571 } 572 573 int fdtdec_check_fdt(void) 574 { 575 /* 576 * We must have an FDT, but we cannot panic() yet since the console 577 * is not ready. So for now, just assert(). Boards which need an early 578 * FDT (prior to console ready) will need to make their own 579 * arrangements and do their own checks. 580 */ 581 assert(!fdtdec_prepare_fdt()); 582 return 0; 583 } 584 585 /* 586 * This function is a little odd in that it accesses global data. At some 587 * point if the architecture board.c files merge this will make more sense. 588 * Even now, it is common code. 589 */ 590 int fdtdec_prepare_fdt(void) 591 { 592 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 593 fdt_check_header(gd->fdt_blob)) { 594 #ifdef CONFIG_SPL_BUILD 595 puts("Missing DTB\n"); 596 #else 597 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"); 598 # ifdef DEBUG 599 if (gd->fdt_blob) { 600 printf("fdt_blob=%p\n", gd->fdt_blob); 601 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4, 602 32, 0); 603 } 604 # endif 605 #endif 606 return -1; 607 } 608 return 0; 609 } 610 611 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 612 { 613 const u32 *phandle; 614 int lookup; 615 616 debug("%s: %s\n", __func__, prop_name); 617 phandle = fdt_getprop(blob, node, prop_name, NULL); 618 if (!phandle) 619 return -FDT_ERR_NOTFOUND; 620 621 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 622 return lookup; 623 } 624 625 /** 626 * Look up a property in a node and check that it has a minimum length. 627 * 628 * @param blob FDT blob 629 * @param node node to examine 630 * @param prop_name name of property to find 631 * @param min_len minimum property length in bytes 632 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 633 found, or -FDT_ERR_BADLAYOUT if not enough data 634 * @return pointer to cell, which is only valid if err == 0 635 */ 636 static const void *get_prop_check_min_len(const void *blob, int node, 637 const char *prop_name, int min_len, int *err) 638 { 639 const void *cell; 640 int len; 641 642 debug("%s: %s\n", __func__, prop_name); 643 cell = fdt_getprop(blob, node, prop_name, &len); 644 if (!cell) 645 *err = -FDT_ERR_NOTFOUND; 646 else if (len < min_len) 647 *err = -FDT_ERR_BADLAYOUT; 648 else 649 *err = 0; 650 return cell; 651 } 652 653 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 654 u32 *array, int count) 655 { 656 const u32 *cell; 657 int i, err = 0; 658 659 debug("%s: %s\n", __func__, prop_name); 660 cell = get_prop_check_min_len(blob, node, prop_name, 661 sizeof(u32) * count, &err); 662 if (!err) { 663 for (i = 0; i < count; i++) 664 array[i] = fdt32_to_cpu(cell[i]); 665 } 666 return err; 667 } 668 669 int fdtdec_get_int_array_count(const void *blob, int node, 670 const char *prop_name, u32 *array, int count) 671 { 672 const u32 *cell; 673 int len, elems; 674 int i; 675 676 debug("%s: %s\n", __func__, prop_name); 677 cell = fdt_getprop(blob, node, prop_name, &len); 678 if (!cell) 679 return -FDT_ERR_NOTFOUND; 680 elems = len / sizeof(u32); 681 if (count > elems) 682 count = elems; 683 for (i = 0; i < count; i++) 684 array[i] = fdt32_to_cpu(cell[i]); 685 686 return count; 687 } 688 689 const u32 *fdtdec_locate_array(const void *blob, int node, 690 const char *prop_name, int count) 691 { 692 const u32 *cell; 693 int err; 694 695 cell = get_prop_check_min_len(blob, node, prop_name, 696 sizeof(u32) * count, &err); 697 return err ? NULL : cell; 698 } 699 700 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 701 { 702 const s32 *cell; 703 int len; 704 705 debug("%s: %s\n", __func__, prop_name); 706 cell = fdt_getprop(blob, node, prop_name, &len); 707 return cell != NULL; 708 } 709 710 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 711 const char *list_name, 712 const char *cells_name, 713 int cell_count, int index, 714 struct fdtdec_phandle_args *out_args) 715 { 716 const __be32 *list, *list_end; 717 int rc = 0, size, cur_index = 0; 718 uint32_t count = 0; 719 int node = -1; 720 int phandle; 721 722 /* Retrieve the phandle list property */ 723 list = fdt_getprop(blob, src_node, list_name, &size); 724 if (!list) 725 return -ENOENT; 726 list_end = list + size / sizeof(*list); 727 728 /* Loop over the phandles until all the requested entry is found */ 729 while (list < list_end) { 730 rc = -EINVAL; 731 count = 0; 732 733 /* 734 * If phandle is 0, then it is an empty entry with no 735 * arguments. Skip forward to the next entry. 736 */ 737 phandle = be32_to_cpup(list++); 738 if (phandle) { 739 /* 740 * Find the provider node and parse the #*-cells 741 * property to determine the argument length. 742 * 743 * This is not needed if the cell count is hard-coded 744 * (i.e. cells_name not set, but cell_count is set), 745 * except when we're going to return the found node 746 * below. 747 */ 748 if (cells_name || cur_index == index) { 749 node = fdt_node_offset_by_phandle(blob, 750 phandle); 751 if (!node) { 752 debug("%s: could not find phandle\n", 753 fdt_get_name(blob, src_node, 754 NULL)); 755 goto err; 756 } 757 } 758 759 if (cells_name) { 760 count = fdtdec_get_int(blob, node, cells_name, 761 -1); 762 if (count == -1) { 763 debug("%s: could not get %s for %s\n", 764 fdt_get_name(blob, src_node, 765 NULL), 766 cells_name, 767 fdt_get_name(blob, node, 768 NULL)); 769 goto err; 770 } 771 } else { 772 count = cell_count; 773 } 774 775 /* 776 * Make sure that the arguments actually fit in the 777 * remaining property data length 778 */ 779 if (list + count > list_end) { 780 debug("%s: arguments longer than property\n", 781 fdt_get_name(blob, src_node, NULL)); 782 goto err; 783 } 784 } 785 786 /* 787 * All of the error cases above bail out of the loop, so at 788 * this point, the parsing is successful. If the requested 789 * index matches, then fill the out_args structure and return, 790 * or return -ENOENT for an empty entry. 791 */ 792 rc = -ENOENT; 793 if (cur_index == index) { 794 if (!phandle) 795 goto err; 796 797 if (out_args) { 798 int i; 799 800 if (count > MAX_PHANDLE_ARGS) { 801 debug("%s: too many arguments %d\n", 802 fdt_get_name(blob, src_node, 803 NULL), count); 804 count = MAX_PHANDLE_ARGS; 805 } 806 out_args->node = node; 807 out_args->args_count = count; 808 for (i = 0; i < count; i++) { 809 out_args->args[i] = 810 be32_to_cpup(list++); 811 } 812 } 813 814 /* Found it! return success */ 815 return 0; 816 } 817 818 node = -1; 819 list += count; 820 cur_index++; 821 } 822 823 /* 824 * Result will be one of: 825 * -ENOENT : index is for empty phandle 826 * -EINVAL : parsing error on data 827 * [1..n] : Number of phandle (count mode; when index = -1) 828 */ 829 rc = index < 0 ? cur_index : -ENOENT; 830 err: 831 return rc; 832 } 833 834 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 835 u8 *array, int count) 836 { 837 const u8 *cell; 838 int err; 839 840 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 841 if (!err) 842 memcpy(array, cell, count); 843 return err; 844 } 845 846 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 847 const char *prop_name, int count) 848 { 849 const u8 *cell; 850 int err; 851 852 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 853 if (err) 854 return NULL; 855 return cell; 856 } 857 858 int fdtdec_get_config_int(const void *blob, const char *prop_name, 859 int default_val) 860 { 861 int config_node; 862 863 debug("%s: %s\n", __func__, prop_name); 864 config_node = fdt_path_offset(blob, "/config"); 865 if (config_node < 0) 866 return default_val; 867 return fdtdec_get_int(blob, config_node, prop_name, default_val); 868 } 869 870 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 871 { 872 int config_node; 873 const void *prop; 874 875 debug("%s: %s\n", __func__, prop_name); 876 config_node = fdt_path_offset(blob, "/config"); 877 if (config_node < 0) 878 return 0; 879 prop = fdt_get_property(blob, config_node, prop_name, NULL); 880 881 return prop != NULL; 882 } 883 884 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 885 { 886 const char *nodep; 887 int nodeoffset; 888 int len; 889 890 debug("%s: %s\n", __func__, prop_name); 891 nodeoffset = fdt_path_offset(blob, "/config"); 892 if (nodeoffset < 0) 893 return NULL; 894 895 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 896 if (!nodep) 897 return NULL; 898 899 return (char *)nodep; 900 } 901 902 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 903 fdt_addr_t *basep, fdt_size_t *sizep) 904 { 905 const fdt_addr_t *cell; 906 int len; 907 908 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 909 prop_name); 910 cell = fdt_getprop(blob, node, prop_name, &len); 911 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 912 debug("cell=%p, len=%d\n", cell, len); 913 return -1; 914 } 915 916 *basep = fdt_addr_to_cpu(*cell); 917 *sizep = fdt_size_to_cpu(cell[1]); 918 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 919 (ulong)*sizep); 920 921 return 0; 922 } 923 924 /** 925 * Read a flash entry from the fdt 926 * 927 * @param blob FDT blob 928 * @param node Offset of node to read 929 * @param name Name of node being read 930 * @param entry Place to put offset and size of this node 931 * @return 0 if ok, -ve on error 932 */ 933 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 934 struct fmap_entry *entry) 935 { 936 const char *prop; 937 u32 reg[2]; 938 939 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 940 debug("Node '%s' has bad/missing 'reg' property\n", name); 941 return -FDT_ERR_NOTFOUND; 942 } 943 entry->offset = reg[0]; 944 entry->length = reg[1]; 945 entry->used = fdtdec_get_int(blob, node, "used", entry->length); 946 prop = fdt_getprop(blob, node, "compress", NULL); 947 entry->compress_algo = prop && !strcmp(prop, "lzo") ? 948 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; 949 prop = fdt_getprop(blob, node, "hash", &entry->hash_size); 950 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; 951 entry->hash = (uint8_t *)prop; 952 953 return 0; 954 } 955 956 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 957 { 958 u64 number = 0; 959 960 while (cells--) 961 number = (number << 32) | fdt32_to_cpu(*ptr++); 962 963 return number; 964 } 965 966 int fdt_get_resource(const void *fdt, int node, const char *property, 967 unsigned int index, struct fdt_resource *res) 968 { 969 const fdt32_t *ptr, *end; 970 int na, ns, len, parent; 971 unsigned int i = 0; 972 973 parent = fdt_parent_offset(fdt, node); 974 if (parent < 0) 975 return parent; 976 977 na = fdt_address_cells(fdt, parent); 978 ns = fdt_size_cells(fdt, parent); 979 980 ptr = fdt_getprop(fdt, node, property, &len); 981 if (!ptr) 982 return len; 983 984 end = ptr + len / sizeof(*ptr); 985 986 while (ptr + na + ns <= end) { 987 if (i == index) { 988 res->start = res->end = fdtdec_get_number(ptr, na); 989 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 990 return 0; 991 } 992 993 ptr += na + ns; 994 i++; 995 } 996 997 return -FDT_ERR_NOTFOUND; 998 } 999 1000 int fdt_get_named_resource(const void *fdt, int node, const char *property, 1001 const char *prop_names, const char *name, 1002 struct fdt_resource *res) 1003 { 1004 int index; 1005 1006 index = fdt_find_string(fdt, node, prop_names, name); 1007 if (index < 0) 1008 return index; 1009 1010 return fdt_get_resource(fdt, node, property, index, res); 1011 } 1012 1013 int fdtdec_decode_memory_region(const void *blob, int config_node, 1014 const char *mem_type, const char *suffix, 1015 fdt_addr_t *basep, fdt_size_t *sizep) 1016 { 1017 char prop_name[50]; 1018 const char *mem; 1019 fdt_size_t size, offset_size; 1020 fdt_addr_t base, offset; 1021 int node; 1022 1023 if (config_node == -1) { 1024 config_node = fdt_path_offset(blob, "/config"); 1025 if (config_node < 0) { 1026 debug("%s: Cannot find /config node\n", __func__); 1027 return -ENOENT; 1028 } 1029 } 1030 if (!suffix) 1031 suffix = ""; 1032 1033 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 1034 suffix); 1035 mem = fdt_getprop(blob, config_node, prop_name, NULL); 1036 if (!mem) { 1037 debug("%s: No memory type for '%s', using /memory\n", __func__, 1038 prop_name); 1039 mem = "/memory"; 1040 } 1041 1042 node = fdt_path_offset(blob, mem); 1043 if (node < 0) { 1044 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 1045 fdt_strerror(node)); 1046 return -ENOENT; 1047 } 1048 1049 /* 1050 * Not strictly correct - the memory may have multiple banks. We just 1051 * use the first 1052 */ 1053 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 1054 debug("%s: Failed to decode memory region %s\n", __func__, 1055 mem); 1056 return -EINVAL; 1057 } 1058 1059 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 1060 suffix); 1061 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 1062 &offset_size)) { 1063 debug("%s: Failed to decode memory region '%s'\n", __func__, 1064 prop_name); 1065 return -EINVAL; 1066 } 1067 1068 *basep = base + offset; 1069 *sizep = offset_size; 1070 1071 return 0; 1072 } 1073 1074 static int decode_timing_property(const void *blob, int node, const char *name, 1075 struct timing_entry *result) 1076 { 1077 int length, ret = 0; 1078 const u32 *prop; 1079 1080 prop = fdt_getprop(blob, node, name, &length); 1081 if (!prop) { 1082 debug("%s: could not find property %s\n", 1083 fdt_get_name(blob, node, NULL), name); 1084 return length; 1085 } 1086 1087 if (length == sizeof(u32)) { 1088 result->typ = fdtdec_get_int(blob, node, name, 0); 1089 result->min = result->typ; 1090 result->max = result->typ; 1091 } else { 1092 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3); 1093 } 1094 1095 return ret; 1096 } 1097 1098 int fdtdec_decode_display_timing(const void *blob, int parent, int index, 1099 struct display_timing *dt) 1100 { 1101 int i, node, timings_node; 1102 u32 val = 0; 1103 int ret = 0; 1104 1105 timings_node = fdt_subnode_offset(blob, parent, "display-timings"); 1106 if (timings_node < 0) 1107 return timings_node; 1108 1109 for (i = 0, node = fdt_first_subnode(blob, timings_node); 1110 node > 0 && i != index; 1111 node = fdt_next_subnode(blob, node)) 1112 i++; 1113 1114 if (node < 0) 1115 return node; 1116 1117 memset(dt, 0, sizeof(*dt)); 1118 1119 ret |= decode_timing_property(blob, node, "hback-porch", 1120 &dt->hback_porch); 1121 ret |= decode_timing_property(blob, node, "hfront-porch", 1122 &dt->hfront_porch); 1123 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive); 1124 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len); 1125 ret |= decode_timing_property(blob, node, "vback-porch", 1126 &dt->vback_porch); 1127 ret |= decode_timing_property(blob, node, "vfront-porch", 1128 &dt->vfront_porch); 1129 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive); 1130 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len); 1131 ret |= decode_timing_property(blob, node, "clock-frequency", 1132 &dt->pixelclock); 1133 1134 dt->flags = 0; 1135 val = fdtdec_get_int(blob, node, "vsync-active", -1); 1136 if (val != -1) { 1137 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : 1138 DISPLAY_FLAGS_VSYNC_LOW; 1139 } 1140 val = fdtdec_get_int(blob, node, "hsync-active", -1); 1141 if (val != -1) { 1142 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : 1143 DISPLAY_FLAGS_HSYNC_LOW; 1144 } 1145 val = fdtdec_get_int(blob, node, "de-active", -1); 1146 if (val != -1) { 1147 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : 1148 DISPLAY_FLAGS_DE_LOW; 1149 } 1150 val = fdtdec_get_int(blob, node, "pixelclk-active", -1); 1151 if (val != -1) { 1152 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : 1153 DISPLAY_FLAGS_PIXDATA_NEGEDGE; 1154 } 1155 1156 if (fdtdec_get_bool(blob, node, "interlaced")) 1157 dt->flags |= DISPLAY_FLAGS_INTERLACED; 1158 if (fdtdec_get_bool(blob, node, "doublescan")) 1159 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; 1160 if (fdtdec_get_bool(blob, node, "doubleclk")) 1161 dt->flags |= DISPLAY_FLAGS_DOUBLECLK; 1162 1163 return 0; 1164 } 1165 1166 int fdtdec_setup(void) 1167 { 1168 #if CONFIG_IS_ENABLED(OF_CONTROL) 1169 # ifdef CONFIG_OF_EMBED 1170 /* Get a pointer to the FDT */ 1171 gd->fdt_blob = __dtb_dt_begin; 1172 # elif defined CONFIG_OF_SEPARATE 1173 # ifdef CONFIG_SPL_BUILD 1174 /* FDT is at end of BSS unless it is in a different memory region */ 1175 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS)) 1176 gd->fdt_blob = (ulong *)&_image_binary_end; 1177 else 1178 gd->fdt_blob = (ulong *)&__bss_end; 1179 # else 1180 /* FDT is at end of image */ 1181 gd->fdt_blob = (ulong *)&_end; 1182 # endif 1183 # elif defined(CONFIG_OF_HOSTFILE) 1184 if (sandbox_read_fdt_from_file()) { 1185 puts("Failed to read control FDT\n"); 1186 return -1; 1187 } 1188 # endif 1189 # ifndef CONFIG_SPL_BUILD 1190 /* Allow the early environment to override the fdt address */ 1191 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, 1192 (uintptr_t)gd->fdt_blob); 1193 # endif 1194 #endif 1195 return fdtdec_prepare_fdt(); 1196 } 1197 1198 #endif /* !USE_HOSTCC */ 1199