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_SOR, "nvidia,tegra124-sor"), 31 COMPAT(NVIDIA_TEGRA124_PMC, "nvidia,tegra124-pmc"), 32 COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"), 33 COMPAT(NVIDIA_TEGRA210_SDMMC, "nvidia,tegra210-sdhci"), 34 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"), 35 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"), 36 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"), 37 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"), 38 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"), 39 COMPAT(SMSC_LAN9215, "smsc,lan9215"), 40 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), 41 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), 42 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), 43 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), 44 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"), 45 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), 46 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"), 47 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), 48 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"), 49 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"), 50 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"), 51 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), 52 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), 53 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"), 54 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"), 55 COMPAT(GENERIC_SPI_FLASH, "spi-flash"), 56 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), 57 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), 58 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), 59 COMPAT(INTEL_MICROCODE, "intel,microcode"), 60 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"), 61 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"), 62 COMPAT(INTEL_GMA, "intel,gma"), 63 COMPAT(AMS_AS3722, "ams,as3722"), 64 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"), 65 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"), 66 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"), 67 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"), 68 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"), 69 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"), 70 COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"), 71 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"), 72 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"), 73 COMPAT(COMPAT_INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"), 74 }; 75 76 const char *fdtdec_get_compatible(enum fdt_compat_id id) 77 { 78 /* We allow reading of the 'unknown' ID for testing purposes */ 79 assert(id >= 0 && id < COMPAT_COUNT); 80 return compat_names[id]; 81 } 82 83 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node, 84 const char *prop_name, int index, int na, int ns, 85 fdt_size_t *sizep) 86 { 87 const fdt32_t *prop, *prop_end; 88 const fdt32_t *prop_addr, *prop_size, *prop_after_size; 89 int len; 90 fdt_addr_t addr; 91 92 debug("%s: %s: ", __func__, prop_name); 93 94 if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) { 95 debug("(na too large for fdt_addr_t type)\n"); 96 return FDT_ADDR_T_NONE; 97 } 98 99 if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) { 100 debug("(ns too large for fdt_size_t type)\n"); 101 return FDT_ADDR_T_NONE; 102 } 103 104 prop = fdt_getprop(blob, node, prop_name, &len); 105 if (!prop) { 106 debug("(not found)\n"); 107 return FDT_ADDR_T_NONE; 108 } 109 prop_end = prop + (len / sizeof(*prop)); 110 111 prop_addr = prop + (index * (na + ns)); 112 prop_size = prop_addr + na; 113 prop_after_size = prop_size + ns; 114 if (prop_after_size > prop_end) { 115 debug("(not enough data: expected >= %d cells, got %d cells)\n", 116 (u32)(prop_after_size - prop), ((u32)(prop_end - prop))); 117 return FDT_ADDR_T_NONE; 118 } 119 120 addr = fdtdec_get_number(prop_addr, na); 121 122 if (sizep) { 123 *sizep = fdtdec_get_number(prop_size, ns); 124 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr, 125 (unsigned long long)*sizep); 126 } else { 127 debug("addr=%08llx\n", (unsigned long long)addr); 128 } 129 130 return addr; 131 } 132 133 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent, 134 int node, const char *prop_name, int index, fdt_size_t *sizep) 135 { 136 int na, ns; 137 138 debug("%s: ", __func__); 139 140 na = fdt_address_cells(blob, parent); 141 if (na < 1) { 142 debug("(bad #address-cells)\n"); 143 return FDT_ADDR_T_NONE; 144 } 145 146 ns = fdt_size_cells(blob, parent); 147 if (ns < 0) { 148 debug("(bad #size-cells)\n"); 149 return FDT_ADDR_T_NONE; 150 } 151 152 debug("na=%d, ns=%d, ", na, ns); 153 154 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na, 155 ns, sizep); 156 } 157 158 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node, 159 const char *prop_name, int index, fdt_size_t *sizep) 160 { 161 int parent; 162 163 debug("%s: ", __func__); 164 165 parent = fdt_parent_offset(blob, node); 166 if (parent < 0) { 167 debug("(no parent found)\n"); 168 return FDT_ADDR_T_NONE; 169 } 170 171 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name, 172 index, sizep); 173 } 174 175 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 176 const char *prop_name, fdt_size_t *sizep) 177 { 178 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0; 179 180 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0, 181 sizeof(fdt_addr_t) / sizeof(fdt32_t), 182 ns, sizep); 183 } 184 185 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 186 const char *prop_name) 187 { 188 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 189 } 190 191 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI) 192 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 193 const char *prop_name, struct fdt_pci_addr *addr) 194 { 195 const u32 *cell; 196 int len; 197 int ret = -ENOENT; 198 199 debug("%s: %s: ", __func__, prop_name); 200 201 /* 202 * If we follow the pci bus bindings strictly, we should check 203 * the value of the node's parent node's #address-cells and 204 * #size-cells. They need to be 3 and 2 accordingly. However, 205 * for simplicity we skip the check here. 206 */ 207 cell = fdt_getprop(blob, node, prop_name, &len); 208 if (!cell) 209 goto fail; 210 211 if ((len % FDT_PCI_REG_SIZE) == 0) { 212 int num = len / FDT_PCI_REG_SIZE; 213 int i; 214 215 for (i = 0; i < num; i++) { 216 debug("pci address #%d: %08lx %08lx %08lx\n", i, 217 (ulong)fdt32_to_cpu(cell[0]), 218 (ulong)fdt32_to_cpu(cell[1]), 219 (ulong)fdt32_to_cpu(cell[2])); 220 if ((fdt32_to_cpu(*cell) & type) == type) { 221 addr->phys_hi = fdt32_to_cpu(cell[0]); 222 addr->phys_mid = fdt32_to_cpu(cell[1]); 223 addr->phys_lo = fdt32_to_cpu(cell[1]); 224 break; 225 } else { 226 cell += (FDT_PCI_ADDR_CELLS + 227 FDT_PCI_SIZE_CELLS); 228 } 229 } 230 231 if (i == num) { 232 ret = -ENXIO; 233 goto fail; 234 } 235 236 return 0; 237 } else { 238 ret = -EINVAL; 239 } 240 241 fail: 242 debug("(not found)\n"); 243 return ret; 244 } 245 246 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 247 { 248 const char *list, *end; 249 int len; 250 251 list = fdt_getprop(blob, node, "compatible", &len); 252 if (!list) 253 return -ENOENT; 254 255 end = list + len; 256 while (list < end) { 257 char *s; 258 259 len = strlen(list); 260 if (len >= strlen("pciVVVV,DDDD")) { 261 s = strstr(list, "pci"); 262 263 /* 264 * check if the string is something like pciVVVV,DDDD.RR 265 * or just pciVVVV,DDDD 266 */ 267 if (s && s[7] == ',' && 268 (s[12] == '.' || s[12] == 0)) { 269 s += 3; 270 *vendor = simple_strtol(s, NULL, 16); 271 272 s += 5; 273 *device = simple_strtol(s, NULL, 16); 274 275 return 0; 276 } 277 } 278 list += (len + 1); 279 } 280 281 return -ENOENT; 282 } 283 284 int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr, 285 u32 *bar) 286 { 287 int barnum; 288 289 /* extract the bar number from fdt_pci_addr */ 290 barnum = addr->phys_hi & 0xff; 291 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) 292 return -EINVAL; 293 294 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; 295 *bar = dm_pci_read_bar32(dev, barnum); 296 297 return 0; 298 } 299 #endif 300 301 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 302 uint64_t default_val) 303 { 304 const uint64_t *cell64; 305 int length; 306 307 cell64 = fdt_getprop(blob, node, prop_name, &length); 308 if (!cell64 || length < sizeof(*cell64)) 309 return default_val; 310 311 return fdt64_to_cpu(*cell64); 312 } 313 314 int fdtdec_get_is_enabled(const void *blob, int node) 315 { 316 const char *cell; 317 318 /* 319 * It should say "okay", so only allow that. Some fdts use "ok" but 320 * this is a bug. Please fix your device tree source file. See here 321 * for discussion: 322 * 323 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 324 */ 325 cell = fdt_getprop(blob, node, "status", NULL); 326 if (cell) 327 return 0 == strcmp(cell, "okay"); 328 return 1; 329 } 330 331 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 332 { 333 enum fdt_compat_id id; 334 335 /* Search our drivers */ 336 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 337 if (0 == fdt_node_check_compatible(blob, node, 338 compat_names[id])) 339 return id; 340 return COMPAT_UNKNOWN; 341 } 342 343 int fdtdec_next_compatible(const void *blob, int node, 344 enum fdt_compat_id id) 345 { 346 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 347 } 348 349 int fdtdec_next_compatible_subnode(const void *blob, int node, 350 enum fdt_compat_id id, int *depthp) 351 { 352 do { 353 node = fdt_next_node(blob, node, depthp); 354 } while (*depthp > 1); 355 356 /* If this is a direct subnode, and compatible, return it */ 357 if (*depthp == 1 && 0 == fdt_node_check_compatible( 358 blob, node, compat_names[id])) 359 return node; 360 361 return -FDT_ERR_NOTFOUND; 362 } 363 364 int fdtdec_next_alias(const void *blob, const char *name, 365 enum fdt_compat_id id, int *upto) 366 { 367 #define MAX_STR_LEN 20 368 char str[MAX_STR_LEN + 20]; 369 int node, err; 370 371 /* snprintf() is not available */ 372 assert(strlen(name) < MAX_STR_LEN); 373 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 374 node = fdt_path_offset(blob, str); 375 if (node < 0) 376 return node; 377 err = fdt_node_check_compatible(blob, node, compat_names[id]); 378 if (err < 0) 379 return err; 380 if (err) 381 return -FDT_ERR_NOTFOUND; 382 (*upto)++; 383 return node; 384 } 385 386 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 387 enum fdt_compat_id id, int *node_list, int maxcount) 388 { 389 memset(node_list, '\0', sizeof(*node_list) * maxcount); 390 391 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 392 } 393 394 /* TODO: Can we tighten this code up a little? */ 395 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 396 enum fdt_compat_id id, int *node_list, int maxcount) 397 { 398 int name_len = strlen(name); 399 int nodes[maxcount]; 400 int num_found = 0; 401 int offset, node; 402 int alias_node; 403 int count; 404 int i, j; 405 406 /* find the alias node if present */ 407 alias_node = fdt_path_offset(blob, "/aliases"); 408 409 /* 410 * start with nothing, and we can assume that the root node can't 411 * match 412 */ 413 memset(nodes, '\0', sizeof(nodes)); 414 415 /* First find all the compatible nodes */ 416 for (node = count = 0; node >= 0 && count < maxcount;) { 417 node = fdtdec_next_compatible(blob, node, id); 418 if (node >= 0) 419 nodes[count++] = node; 420 } 421 if (node >= 0) 422 debug("%s: warning: maxcount exceeded with alias '%s'\n", 423 __func__, name); 424 425 /* Now find all the aliases */ 426 for (offset = fdt_first_property_offset(blob, alias_node); 427 offset > 0; 428 offset = fdt_next_property_offset(blob, offset)) { 429 const struct fdt_property *prop; 430 const char *path; 431 int number; 432 int found; 433 434 node = 0; 435 prop = fdt_get_property_by_offset(blob, offset, NULL); 436 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 437 if (prop->len && 0 == strncmp(path, name, name_len)) 438 node = fdt_path_offset(blob, prop->data); 439 if (node <= 0) 440 continue; 441 442 /* Get the alias number */ 443 number = simple_strtoul(path + name_len, NULL, 10); 444 if (number < 0 || number >= maxcount) { 445 debug("%s: warning: alias '%s' is out of range\n", 446 __func__, path); 447 continue; 448 } 449 450 /* Make sure the node we found is actually in our list! */ 451 found = -1; 452 for (j = 0; j < count; j++) 453 if (nodes[j] == node) { 454 found = j; 455 break; 456 } 457 458 if (found == -1) { 459 debug("%s: warning: alias '%s' points to a node " 460 "'%s' that is missing or is not compatible " 461 " with '%s'\n", __func__, path, 462 fdt_get_name(blob, node, NULL), 463 compat_names[id]); 464 continue; 465 } 466 467 /* 468 * Add this node to our list in the right place, and mark 469 * it as done. 470 */ 471 if (fdtdec_get_is_enabled(blob, node)) { 472 if (node_list[number]) { 473 debug("%s: warning: alias '%s' requires that " 474 "a node be placed in the list in a " 475 "position which is already filled by " 476 "node '%s'\n", __func__, path, 477 fdt_get_name(blob, node, NULL)); 478 continue; 479 } 480 node_list[number] = node; 481 if (number >= num_found) 482 num_found = number + 1; 483 } 484 nodes[found] = 0; 485 } 486 487 /* Add any nodes not mentioned by an alias */ 488 for (i = j = 0; i < maxcount; i++) { 489 if (!node_list[i]) { 490 for (; j < maxcount; j++) 491 if (nodes[j] && 492 fdtdec_get_is_enabled(blob, nodes[j])) 493 break; 494 495 /* Have we run out of nodes to add? */ 496 if (j == maxcount) 497 break; 498 499 assert(!node_list[i]); 500 node_list[i] = nodes[j++]; 501 if (i >= num_found) 502 num_found = i + 1; 503 } 504 } 505 506 return num_found; 507 } 508 509 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 510 int *seqp) 511 { 512 int base_len = strlen(base); 513 const char *find_name; 514 int find_namelen; 515 int prop_offset; 516 int aliases; 517 518 find_name = fdt_get_name(blob, offset, &find_namelen); 519 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 520 521 aliases = fdt_path_offset(blob, "/aliases"); 522 for (prop_offset = fdt_first_property_offset(blob, aliases); 523 prop_offset > 0; 524 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 525 const char *prop; 526 const char *name; 527 const char *slash; 528 int len, val; 529 530 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 531 debug(" - %s, %s\n", name, prop); 532 if (len < find_namelen || *prop != '/' || prop[len - 1] || 533 strncmp(name, base, base_len)) 534 continue; 535 536 slash = strrchr(prop, '/'); 537 if (strcmp(slash + 1, find_name)) 538 continue; 539 val = trailing_strtol(name); 540 if (val != -1) { 541 *seqp = val; 542 debug("Found seq %d\n", *seqp); 543 return 0; 544 } 545 } 546 547 debug("Not found\n"); 548 return -ENOENT; 549 } 550 551 const char *fdtdec_get_chosen_prop(const void *blob, const char *name) 552 { 553 int chosen_node; 554 555 if (!blob) 556 return NULL; 557 chosen_node = fdt_path_offset(blob, "/chosen"); 558 return fdt_getprop(blob, chosen_node, name, NULL); 559 } 560 561 int fdtdec_get_chosen_node(const void *blob, const char *name) 562 { 563 const char *prop; 564 565 prop = fdtdec_get_chosen_prop(blob, name); 566 if (!prop) 567 return -FDT_ERR_NOTFOUND; 568 return fdt_path_offset(blob, prop); 569 } 570 571 int fdtdec_check_fdt(void) 572 { 573 /* 574 * We must have an FDT, but we cannot panic() yet since the console 575 * is not ready. So for now, just assert(). Boards which need an early 576 * FDT (prior to console ready) will need to make their own 577 * arrangements and do their own checks. 578 */ 579 assert(!fdtdec_prepare_fdt()); 580 return 0; 581 } 582 583 /* 584 * This function is a little odd in that it accesses global data. At some 585 * point if the architecture board.c files merge this will make more sense. 586 * Even now, it is common code. 587 */ 588 int fdtdec_prepare_fdt(void) 589 { 590 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 591 fdt_check_header(gd->fdt_blob)) { 592 #ifdef CONFIG_SPL_BUILD 593 puts("Missing DTB\n"); 594 #else 595 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"); 596 # ifdef DEBUG 597 if (gd->fdt_blob) { 598 printf("fdt_blob=%p\n", gd->fdt_blob); 599 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4, 600 32, 0); 601 } 602 # endif 603 #endif 604 return -1; 605 } 606 return 0; 607 } 608 609 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 610 { 611 const u32 *phandle; 612 int lookup; 613 614 debug("%s: %s\n", __func__, prop_name); 615 phandle = fdt_getprop(blob, node, prop_name, NULL); 616 if (!phandle) 617 return -FDT_ERR_NOTFOUND; 618 619 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 620 return lookup; 621 } 622 623 /** 624 * Look up a property in a node and check that it has a minimum length. 625 * 626 * @param blob FDT blob 627 * @param node node to examine 628 * @param prop_name name of property to find 629 * @param min_len minimum property length in bytes 630 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 631 found, or -FDT_ERR_BADLAYOUT if not enough data 632 * @return pointer to cell, which is only valid if err == 0 633 */ 634 static const void *get_prop_check_min_len(const void *blob, int node, 635 const char *prop_name, int min_len, int *err) 636 { 637 const void *cell; 638 int len; 639 640 debug("%s: %s\n", __func__, prop_name); 641 cell = fdt_getprop(blob, node, prop_name, &len); 642 if (!cell) 643 *err = -FDT_ERR_NOTFOUND; 644 else if (len < min_len) 645 *err = -FDT_ERR_BADLAYOUT; 646 else 647 *err = 0; 648 return cell; 649 } 650 651 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 652 u32 *array, int count) 653 { 654 const u32 *cell; 655 int i, err = 0; 656 657 debug("%s: %s\n", __func__, prop_name); 658 cell = get_prop_check_min_len(blob, node, prop_name, 659 sizeof(u32) * count, &err); 660 if (!err) { 661 for (i = 0; i < count; i++) 662 array[i] = fdt32_to_cpu(cell[i]); 663 } 664 return err; 665 } 666 667 int fdtdec_get_int_array_count(const void *blob, int node, 668 const char *prop_name, u32 *array, int count) 669 { 670 const u32 *cell; 671 int len, elems; 672 int i; 673 674 debug("%s: %s\n", __func__, prop_name); 675 cell = fdt_getprop(blob, node, prop_name, &len); 676 if (!cell) 677 return -FDT_ERR_NOTFOUND; 678 elems = len / sizeof(u32); 679 if (count > elems) 680 count = elems; 681 for (i = 0; i < count; i++) 682 array[i] = fdt32_to_cpu(cell[i]); 683 684 return count; 685 } 686 687 const u32 *fdtdec_locate_array(const void *blob, int node, 688 const char *prop_name, int count) 689 { 690 const u32 *cell; 691 int err; 692 693 cell = get_prop_check_min_len(blob, node, prop_name, 694 sizeof(u32) * count, &err); 695 return err ? NULL : cell; 696 } 697 698 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 699 { 700 const s32 *cell; 701 int len; 702 703 debug("%s: %s\n", __func__, prop_name); 704 cell = fdt_getprop(blob, node, prop_name, &len); 705 return cell != NULL; 706 } 707 708 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 709 const char *list_name, 710 const char *cells_name, 711 int cell_count, int index, 712 struct fdtdec_phandle_args *out_args) 713 { 714 const __be32 *list, *list_end; 715 int rc = 0, size, cur_index = 0; 716 uint32_t count = 0; 717 int node = -1; 718 int phandle; 719 720 /* Retrieve the phandle list property */ 721 list = fdt_getprop(blob, src_node, list_name, &size); 722 if (!list) 723 return -ENOENT; 724 list_end = list + size / sizeof(*list); 725 726 /* Loop over the phandles until all the requested entry is found */ 727 while (list < list_end) { 728 rc = -EINVAL; 729 count = 0; 730 731 /* 732 * If phandle is 0, then it is an empty entry with no 733 * arguments. Skip forward to the next entry. 734 */ 735 phandle = be32_to_cpup(list++); 736 if (phandle) { 737 /* 738 * Find the provider node and parse the #*-cells 739 * property to determine the argument length. 740 * 741 * This is not needed if the cell count is hard-coded 742 * (i.e. cells_name not set, but cell_count is set), 743 * except when we're going to return the found node 744 * below. 745 */ 746 if (cells_name || cur_index == index) { 747 node = fdt_node_offset_by_phandle(blob, 748 phandle); 749 if (!node) { 750 debug("%s: could not find phandle\n", 751 fdt_get_name(blob, src_node, 752 NULL)); 753 goto err; 754 } 755 } 756 757 if (cells_name) { 758 count = fdtdec_get_int(blob, node, cells_name, 759 -1); 760 if (count == -1) { 761 debug("%s: could not get %s for %s\n", 762 fdt_get_name(blob, src_node, 763 NULL), 764 cells_name, 765 fdt_get_name(blob, node, 766 NULL)); 767 goto err; 768 } 769 } else { 770 count = cell_count; 771 } 772 773 /* 774 * Make sure that the arguments actually fit in the 775 * remaining property data length 776 */ 777 if (list + count > list_end) { 778 debug("%s: arguments longer than property\n", 779 fdt_get_name(blob, src_node, NULL)); 780 goto err; 781 } 782 } 783 784 /* 785 * All of the error cases above bail out of the loop, so at 786 * this point, the parsing is successful. If the requested 787 * index matches, then fill the out_args structure and return, 788 * or return -ENOENT for an empty entry. 789 */ 790 rc = -ENOENT; 791 if (cur_index == index) { 792 if (!phandle) 793 goto err; 794 795 if (out_args) { 796 int i; 797 798 if (count > MAX_PHANDLE_ARGS) { 799 debug("%s: too many arguments %d\n", 800 fdt_get_name(blob, src_node, 801 NULL), count); 802 count = MAX_PHANDLE_ARGS; 803 } 804 out_args->node = node; 805 out_args->args_count = count; 806 for (i = 0; i < count; i++) { 807 out_args->args[i] = 808 be32_to_cpup(list++); 809 } 810 } 811 812 /* Found it! return success */ 813 return 0; 814 } 815 816 node = -1; 817 list += count; 818 cur_index++; 819 } 820 821 /* 822 * Result will be one of: 823 * -ENOENT : index is for empty phandle 824 * -EINVAL : parsing error on data 825 * [1..n] : Number of phandle (count mode; when index = -1) 826 */ 827 rc = index < 0 ? cur_index : -ENOENT; 828 err: 829 return rc; 830 } 831 832 int fdtdec_get_child_count(const void *blob, int node) 833 { 834 int subnode; 835 int num = 0; 836 837 fdt_for_each_subnode(blob, subnode, node) 838 num++; 839 840 return num; 841 } 842 843 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 844 u8 *array, int count) 845 { 846 const u8 *cell; 847 int err; 848 849 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 850 if (!err) 851 memcpy(array, cell, count); 852 return err; 853 } 854 855 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 856 const char *prop_name, int count) 857 { 858 const u8 *cell; 859 int err; 860 861 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 862 if (err) 863 return NULL; 864 return cell; 865 } 866 867 int fdtdec_get_config_int(const void *blob, const char *prop_name, 868 int default_val) 869 { 870 int config_node; 871 872 debug("%s: %s\n", __func__, prop_name); 873 config_node = fdt_path_offset(blob, "/config"); 874 if (config_node < 0) 875 return default_val; 876 return fdtdec_get_int(blob, config_node, prop_name, default_val); 877 } 878 879 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 880 { 881 int config_node; 882 const void *prop; 883 884 debug("%s: %s\n", __func__, prop_name); 885 config_node = fdt_path_offset(blob, "/config"); 886 if (config_node < 0) 887 return 0; 888 prop = fdt_get_property(blob, config_node, prop_name, NULL); 889 890 return prop != NULL; 891 } 892 893 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 894 { 895 const char *nodep; 896 int nodeoffset; 897 int len; 898 899 debug("%s: %s\n", __func__, prop_name); 900 nodeoffset = fdt_path_offset(blob, "/config"); 901 if (nodeoffset < 0) 902 return NULL; 903 904 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 905 if (!nodep) 906 return NULL; 907 908 return (char *)nodep; 909 } 910 911 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 912 fdt_addr_t *basep, fdt_size_t *sizep) 913 { 914 const fdt_addr_t *cell; 915 int len; 916 917 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 918 prop_name); 919 cell = fdt_getprop(blob, node, prop_name, &len); 920 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 921 debug("cell=%p, len=%d\n", cell, len); 922 return -1; 923 } 924 925 *basep = fdt_addr_to_cpu(*cell); 926 *sizep = fdt_size_to_cpu(cell[1]); 927 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 928 (ulong)*sizep); 929 930 return 0; 931 } 932 933 /** 934 * Read a flash entry from the fdt 935 * 936 * @param blob FDT blob 937 * @param node Offset of node to read 938 * @param name Name of node being read 939 * @param entry Place to put offset and size of this node 940 * @return 0 if ok, -ve on error 941 */ 942 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 943 struct fmap_entry *entry) 944 { 945 const char *prop; 946 u32 reg[2]; 947 948 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 949 debug("Node '%s' has bad/missing 'reg' property\n", name); 950 return -FDT_ERR_NOTFOUND; 951 } 952 entry->offset = reg[0]; 953 entry->length = reg[1]; 954 entry->used = fdtdec_get_int(blob, node, "used", entry->length); 955 prop = fdt_getprop(blob, node, "compress", NULL); 956 entry->compress_algo = prop && !strcmp(prop, "lzo") ? 957 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; 958 prop = fdt_getprop(blob, node, "hash", &entry->hash_size); 959 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; 960 entry->hash = (uint8_t *)prop; 961 962 return 0; 963 } 964 965 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 966 { 967 u64 number = 0; 968 969 while (cells--) 970 number = (number << 32) | fdt32_to_cpu(*ptr++); 971 972 return number; 973 } 974 975 int fdt_get_resource(const void *fdt, int node, const char *property, 976 unsigned int index, struct fdt_resource *res) 977 { 978 const fdt32_t *ptr, *end; 979 int na, ns, len, parent; 980 unsigned int i = 0; 981 982 parent = fdt_parent_offset(fdt, node); 983 if (parent < 0) 984 return parent; 985 986 na = fdt_address_cells(fdt, parent); 987 ns = fdt_size_cells(fdt, parent); 988 989 ptr = fdt_getprop(fdt, node, property, &len); 990 if (!ptr) 991 return len; 992 993 end = ptr + len / sizeof(*ptr); 994 995 while (ptr + na + ns <= end) { 996 if (i == index) { 997 res->start = res->end = fdtdec_get_number(ptr, na); 998 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 999 return 0; 1000 } 1001 1002 ptr += na + ns; 1003 i++; 1004 } 1005 1006 return -FDT_ERR_NOTFOUND; 1007 } 1008 1009 int fdt_get_named_resource(const void *fdt, int node, const char *property, 1010 const char *prop_names, const char *name, 1011 struct fdt_resource *res) 1012 { 1013 int index; 1014 1015 index = fdt_find_string(fdt, node, prop_names, name); 1016 if (index < 0) 1017 return index; 1018 1019 return fdt_get_resource(fdt, node, property, index, res); 1020 } 1021 1022 int fdtdec_decode_memory_region(const void *blob, int config_node, 1023 const char *mem_type, const char *suffix, 1024 fdt_addr_t *basep, fdt_size_t *sizep) 1025 { 1026 char prop_name[50]; 1027 const char *mem; 1028 fdt_size_t size, offset_size; 1029 fdt_addr_t base, offset; 1030 int node; 1031 1032 if (config_node == -1) { 1033 config_node = fdt_path_offset(blob, "/config"); 1034 if (config_node < 0) { 1035 debug("%s: Cannot find /config node\n", __func__); 1036 return -ENOENT; 1037 } 1038 } 1039 if (!suffix) 1040 suffix = ""; 1041 1042 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 1043 suffix); 1044 mem = fdt_getprop(blob, config_node, prop_name, NULL); 1045 if (!mem) { 1046 debug("%s: No memory type for '%s', using /memory\n", __func__, 1047 prop_name); 1048 mem = "/memory"; 1049 } 1050 1051 node = fdt_path_offset(blob, mem); 1052 if (node < 0) { 1053 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 1054 fdt_strerror(node)); 1055 return -ENOENT; 1056 } 1057 1058 /* 1059 * Not strictly correct - the memory may have multiple banks. We just 1060 * use the first 1061 */ 1062 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 1063 debug("%s: Failed to decode memory region %s\n", __func__, 1064 mem); 1065 return -EINVAL; 1066 } 1067 1068 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 1069 suffix); 1070 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 1071 &offset_size)) { 1072 debug("%s: Failed to decode memory region '%s'\n", __func__, 1073 prop_name); 1074 return -EINVAL; 1075 } 1076 1077 *basep = base + offset; 1078 *sizep = offset_size; 1079 1080 return 0; 1081 } 1082 1083 static int decode_timing_property(const void *blob, int node, const char *name, 1084 struct timing_entry *result) 1085 { 1086 int length, ret = 0; 1087 const u32 *prop; 1088 1089 prop = fdt_getprop(blob, node, name, &length); 1090 if (!prop) { 1091 debug("%s: could not find property %s\n", 1092 fdt_get_name(blob, node, NULL), name); 1093 return length; 1094 } 1095 1096 if (length == sizeof(u32)) { 1097 result->typ = fdtdec_get_int(blob, node, name, 0); 1098 result->min = result->typ; 1099 result->max = result->typ; 1100 } else { 1101 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3); 1102 } 1103 1104 return ret; 1105 } 1106 1107 int fdtdec_decode_display_timing(const void *blob, int parent, int index, 1108 struct display_timing *dt) 1109 { 1110 int i, node, timings_node; 1111 u32 val = 0; 1112 int ret = 0; 1113 1114 timings_node = fdt_subnode_offset(blob, parent, "display-timings"); 1115 if (timings_node < 0) 1116 return timings_node; 1117 1118 for (i = 0, node = fdt_first_subnode(blob, timings_node); 1119 node > 0 && i != index; 1120 node = fdt_next_subnode(blob, node)) 1121 i++; 1122 1123 if (node < 0) 1124 return node; 1125 1126 memset(dt, 0, sizeof(*dt)); 1127 1128 ret |= decode_timing_property(blob, node, "hback-porch", 1129 &dt->hback_porch); 1130 ret |= decode_timing_property(blob, node, "hfront-porch", 1131 &dt->hfront_porch); 1132 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive); 1133 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len); 1134 ret |= decode_timing_property(blob, node, "vback-porch", 1135 &dt->vback_porch); 1136 ret |= decode_timing_property(blob, node, "vfront-porch", 1137 &dt->vfront_porch); 1138 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive); 1139 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len); 1140 ret |= decode_timing_property(blob, node, "clock-frequency", 1141 &dt->pixelclock); 1142 1143 dt->flags = 0; 1144 val = fdtdec_get_int(blob, node, "vsync-active", -1); 1145 if (val != -1) { 1146 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : 1147 DISPLAY_FLAGS_VSYNC_LOW; 1148 } 1149 val = fdtdec_get_int(blob, node, "hsync-active", -1); 1150 if (val != -1) { 1151 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : 1152 DISPLAY_FLAGS_HSYNC_LOW; 1153 } 1154 val = fdtdec_get_int(blob, node, "de-active", -1); 1155 if (val != -1) { 1156 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : 1157 DISPLAY_FLAGS_DE_LOW; 1158 } 1159 val = fdtdec_get_int(blob, node, "pixelclk-active", -1); 1160 if (val != -1) { 1161 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : 1162 DISPLAY_FLAGS_PIXDATA_NEGEDGE; 1163 } 1164 1165 if (fdtdec_get_bool(blob, node, "interlaced")) 1166 dt->flags |= DISPLAY_FLAGS_INTERLACED; 1167 if (fdtdec_get_bool(blob, node, "doublescan")) 1168 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; 1169 if (fdtdec_get_bool(blob, node, "doubleclk")) 1170 dt->flags |= DISPLAY_FLAGS_DOUBLECLK; 1171 1172 return 0; 1173 } 1174 1175 int fdtdec_setup(void) 1176 { 1177 #if CONFIG_IS_ENABLED(OF_CONTROL) 1178 # ifdef CONFIG_OF_EMBED 1179 /* Get a pointer to the FDT */ 1180 gd->fdt_blob = __dtb_dt_begin; 1181 # elif defined CONFIG_OF_SEPARATE 1182 # ifdef CONFIG_SPL_BUILD 1183 /* FDT is at end of BSS unless it is in a different memory region */ 1184 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS)) 1185 gd->fdt_blob = (ulong *)&_image_binary_end; 1186 else 1187 gd->fdt_blob = (ulong *)&__bss_end; 1188 # else 1189 /* FDT is at end of image */ 1190 gd->fdt_blob = (ulong *)&_end; 1191 # endif 1192 # elif defined(CONFIG_OF_HOSTFILE) 1193 if (sandbox_read_fdt_from_file()) { 1194 puts("Failed to read control FDT\n"); 1195 return -1; 1196 } 1197 # endif 1198 # ifndef CONFIG_SPL_BUILD 1199 /* Allow the early environment to override the fdt address */ 1200 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, 1201 (uintptr_t)gd->fdt_blob); 1202 # endif 1203 #endif 1204 return fdtdec_prepare_fdt(); 1205 } 1206 1207 #endif /* !USE_HOSTCC */ 1208