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(MEMORY_SPD, "memory-spd"), 61 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"), 62 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"), 63 COMPAT(INTEL_GMA, "intel,gma"), 64 COMPAT(AMS_AS3722, "ams,as3722"), 65 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"), 66 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"), 67 COMPAT(INTEL_X86_PINCTRL, "intel,x86-pinctrl"), 68 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"), 69 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"), 70 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"), 71 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"), 72 COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"), 73 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"), 74 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"), 75 COMPAT(COMPAT_INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"), 76 }; 77 78 const char *fdtdec_get_compatible(enum fdt_compat_id id) 79 { 80 /* We allow reading of the 'unknown' ID for testing purposes */ 81 assert(id >= 0 && id < COMPAT_COUNT); 82 return compat_names[id]; 83 } 84 85 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node, 86 const char *prop_name, int index, int na, int ns, 87 fdt_size_t *sizep) 88 { 89 const fdt32_t *prop, *prop_end; 90 const fdt32_t *prop_addr, *prop_size, *prop_after_size; 91 int len; 92 fdt_addr_t addr; 93 94 debug("%s: %s: ", __func__, prop_name); 95 96 if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) { 97 debug("(na too large for fdt_addr_t type)\n"); 98 return FDT_ADDR_T_NONE; 99 } 100 101 if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) { 102 debug("(ns too large for fdt_size_t type)\n"); 103 return FDT_ADDR_T_NONE; 104 } 105 106 prop = fdt_getprop(blob, node, prop_name, &len); 107 if (!prop) { 108 debug("(not found)\n"); 109 return FDT_ADDR_T_NONE; 110 } 111 prop_end = prop + (len / sizeof(*prop)); 112 113 prop_addr = prop + (index * (na + ns)); 114 prop_size = prop_addr + na; 115 prop_after_size = prop_size + ns; 116 if (prop_after_size > prop_end) { 117 debug("(not enough data: expected >= %d cells, got %d cells)\n", 118 (u32)(prop_after_size - prop), ((u32)(prop_end - prop))); 119 return FDT_ADDR_T_NONE; 120 } 121 122 addr = fdtdec_get_number(prop_addr, na); 123 124 if (sizep) { 125 *sizep = fdtdec_get_number(prop_size, ns); 126 debug("addr=%08llx, size=%llx\n", (u64)addr, (u64)*sizep); 127 } else { 128 debug("addr=%08llx\n", (u64)addr); 129 } 130 131 return addr; 132 } 133 134 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent, 135 int node, const char *prop_name, int index, fdt_size_t *sizep) 136 { 137 int na, ns; 138 139 debug("%s: ", __func__); 140 141 na = fdt_address_cells(blob, parent); 142 if (na < 1) { 143 debug("(bad #address-cells)\n"); 144 return FDT_ADDR_T_NONE; 145 } 146 147 ns = fdt_size_cells(blob, parent); 148 if (ns < 0) { 149 debug("(bad #size-cells)\n"); 150 return FDT_ADDR_T_NONE; 151 } 152 153 debug("na=%d, ns=%d, ", na, ns); 154 155 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na, 156 ns, sizep); 157 } 158 159 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node, 160 const char *prop_name, int index, fdt_size_t *sizep) 161 { 162 int parent; 163 164 debug("%s: ", __func__); 165 166 parent = fdt_parent_offset(blob, node); 167 if (parent < 0) { 168 debug("(no parent found)\n"); 169 return FDT_ADDR_T_NONE; 170 } 171 172 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name, 173 index, sizep); 174 } 175 176 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 177 const char *prop_name, fdt_size_t *sizep) 178 { 179 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0; 180 181 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0, 182 sizeof(fdt_addr_t) / sizeof(fdt32_t), 183 ns, sizep); 184 } 185 186 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 187 const char *prop_name) 188 { 189 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 190 } 191 192 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI) 193 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 194 const char *prop_name, struct fdt_pci_addr *addr) 195 { 196 const u32 *cell; 197 int len; 198 int ret = -ENOENT; 199 200 debug("%s: %s: ", __func__, prop_name); 201 202 /* 203 * If we follow the pci bus bindings strictly, we should check 204 * the value of the node's parent node's #address-cells and 205 * #size-cells. They need to be 3 and 2 accordingly. However, 206 * for simplicity we skip the check here. 207 */ 208 cell = fdt_getprop(blob, node, prop_name, &len); 209 if (!cell) 210 goto fail; 211 212 if ((len % FDT_PCI_REG_SIZE) == 0) { 213 int num = len / FDT_PCI_REG_SIZE; 214 int i; 215 216 for (i = 0; i < num; i++) { 217 debug("pci address #%d: %08lx %08lx %08lx\n", i, 218 (ulong)fdt32_to_cpu(cell[0]), 219 (ulong)fdt32_to_cpu(cell[1]), 220 (ulong)fdt32_to_cpu(cell[2])); 221 if ((fdt32_to_cpu(*cell) & type) == type) { 222 addr->phys_hi = fdt32_to_cpu(cell[0]); 223 addr->phys_mid = fdt32_to_cpu(cell[1]); 224 addr->phys_lo = fdt32_to_cpu(cell[1]); 225 break; 226 } else { 227 cell += (FDT_PCI_ADDR_CELLS + 228 FDT_PCI_SIZE_CELLS); 229 } 230 } 231 232 if (i == num) { 233 ret = -ENXIO; 234 goto fail; 235 } 236 237 return 0; 238 } else { 239 ret = -EINVAL; 240 } 241 242 fail: 243 debug("(not found)\n"); 244 return ret; 245 } 246 247 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 248 { 249 const char *list, *end; 250 int len; 251 252 list = fdt_getprop(blob, node, "compatible", &len); 253 if (!list) 254 return -ENOENT; 255 256 end = list + len; 257 while (list < end) { 258 char *s; 259 260 len = strlen(list); 261 if (len >= strlen("pciVVVV,DDDD")) { 262 s = strstr(list, "pci"); 263 264 /* 265 * check if the string is something like pciVVVV,DDDD.RR 266 * or just pciVVVV,DDDD 267 */ 268 if (s && s[7] == ',' && 269 (s[12] == '.' || s[12] == 0)) { 270 s += 3; 271 *vendor = simple_strtol(s, NULL, 16); 272 273 s += 5; 274 *device = simple_strtol(s, NULL, 16); 275 276 return 0; 277 } 278 } 279 list += (len + 1); 280 } 281 282 return -ENOENT; 283 } 284 285 int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr, 286 u32 *bar) 287 { 288 int barnum; 289 290 /* extract the bar number from fdt_pci_addr */ 291 barnum = addr->phys_hi & 0xff; 292 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) 293 return -EINVAL; 294 295 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; 296 *bar = dm_pci_read_bar32(dev, barnum); 297 298 return 0; 299 } 300 #endif 301 302 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 303 uint64_t default_val) 304 { 305 const uint64_t *cell64; 306 int length; 307 308 cell64 = fdt_getprop(blob, node, prop_name, &length); 309 if (!cell64 || length < sizeof(*cell64)) 310 return default_val; 311 312 return fdt64_to_cpu(*cell64); 313 } 314 315 int fdtdec_get_is_enabled(const void *blob, int node) 316 { 317 const char *cell; 318 319 /* 320 * It should say "okay", so only allow that. Some fdts use "ok" but 321 * this is a bug. Please fix your device tree source file. See here 322 * for discussion: 323 * 324 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 325 */ 326 cell = fdt_getprop(blob, node, "status", NULL); 327 if (cell) 328 return 0 == strcmp(cell, "okay"); 329 return 1; 330 } 331 332 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 333 { 334 enum fdt_compat_id id; 335 336 /* Search our drivers */ 337 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 338 if (0 == fdt_node_check_compatible(blob, node, 339 compat_names[id])) 340 return id; 341 return COMPAT_UNKNOWN; 342 } 343 344 int fdtdec_next_compatible(const void *blob, int node, 345 enum fdt_compat_id id) 346 { 347 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 348 } 349 350 int fdtdec_next_compatible_subnode(const void *blob, int node, 351 enum fdt_compat_id id, int *depthp) 352 { 353 do { 354 node = fdt_next_node(blob, node, depthp); 355 } while (*depthp > 1); 356 357 /* If this is a direct subnode, and compatible, return it */ 358 if (*depthp == 1 && 0 == fdt_node_check_compatible( 359 blob, node, compat_names[id])) 360 return node; 361 362 return -FDT_ERR_NOTFOUND; 363 } 364 365 int fdtdec_next_alias(const void *blob, const char *name, 366 enum fdt_compat_id id, int *upto) 367 { 368 #define MAX_STR_LEN 20 369 char str[MAX_STR_LEN + 20]; 370 int node, err; 371 372 /* snprintf() is not available */ 373 assert(strlen(name) < MAX_STR_LEN); 374 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 375 node = fdt_path_offset(blob, str); 376 if (node < 0) 377 return node; 378 err = fdt_node_check_compatible(blob, node, compat_names[id]); 379 if (err < 0) 380 return err; 381 if (err) 382 return -FDT_ERR_NOTFOUND; 383 (*upto)++; 384 return node; 385 } 386 387 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 388 enum fdt_compat_id id, int *node_list, int maxcount) 389 { 390 memset(node_list, '\0', sizeof(*node_list) * maxcount); 391 392 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 393 } 394 395 /* TODO: Can we tighten this code up a little? */ 396 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 397 enum fdt_compat_id id, int *node_list, int maxcount) 398 { 399 int name_len = strlen(name); 400 int nodes[maxcount]; 401 int num_found = 0; 402 int offset, node; 403 int alias_node; 404 int count; 405 int i, j; 406 407 /* find the alias node if present */ 408 alias_node = fdt_path_offset(blob, "/aliases"); 409 410 /* 411 * start with nothing, and we can assume that the root node can't 412 * match 413 */ 414 memset(nodes, '\0', sizeof(nodes)); 415 416 /* First find all the compatible nodes */ 417 for (node = count = 0; node >= 0 && count < maxcount;) { 418 node = fdtdec_next_compatible(blob, node, id); 419 if (node >= 0) 420 nodes[count++] = node; 421 } 422 if (node >= 0) 423 debug("%s: warning: maxcount exceeded with alias '%s'\n", 424 __func__, name); 425 426 /* Now find all the aliases */ 427 for (offset = fdt_first_property_offset(blob, alias_node); 428 offset > 0; 429 offset = fdt_next_property_offset(blob, offset)) { 430 const struct fdt_property *prop; 431 const char *path; 432 int number; 433 int found; 434 435 node = 0; 436 prop = fdt_get_property_by_offset(blob, offset, NULL); 437 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 438 if (prop->len && 0 == strncmp(path, name, name_len)) 439 node = fdt_path_offset(blob, prop->data); 440 if (node <= 0) 441 continue; 442 443 /* Get the alias number */ 444 number = simple_strtoul(path + name_len, NULL, 10); 445 if (number < 0 || number >= maxcount) { 446 debug("%s: warning: alias '%s' is out of range\n", 447 __func__, path); 448 continue; 449 } 450 451 /* Make sure the node we found is actually in our list! */ 452 found = -1; 453 for (j = 0; j < count; j++) 454 if (nodes[j] == node) { 455 found = j; 456 break; 457 } 458 459 if (found == -1) { 460 debug("%s: warning: alias '%s' points to a node " 461 "'%s' that is missing or is not compatible " 462 " with '%s'\n", __func__, path, 463 fdt_get_name(blob, node, NULL), 464 compat_names[id]); 465 continue; 466 } 467 468 /* 469 * Add this node to our list in the right place, and mark 470 * it as done. 471 */ 472 if (fdtdec_get_is_enabled(blob, node)) { 473 if (node_list[number]) { 474 debug("%s: warning: alias '%s' requires that " 475 "a node be placed in the list in a " 476 "position which is already filled by " 477 "node '%s'\n", __func__, path, 478 fdt_get_name(blob, node, NULL)); 479 continue; 480 } 481 node_list[number] = node; 482 if (number >= num_found) 483 num_found = number + 1; 484 } 485 nodes[found] = 0; 486 } 487 488 /* Add any nodes not mentioned by an alias */ 489 for (i = j = 0; i < maxcount; i++) { 490 if (!node_list[i]) { 491 for (; j < maxcount; j++) 492 if (nodes[j] && 493 fdtdec_get_is_enabled(blob, nodes[j])) 494 break; 495 496 /* Have we run out of nodes to add? */ 497 if (j == maxcount) 498 break; 499 500 assert(!node_list[i]); 501 node_list[i] = nodes[j++]; 502 if (i >= num_found) 503 num_found = i + 1; 504 } 505 } 506 507 return num_found; 508 } 509 510 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 511 int *seqp) 512 { 513 int base_len = strlen(base); 514 const char *find_name; 515 int find_namelen; 516 int prop_offset; 517 int aliases; 518 519 find_name = fdt_get_name(blob, offset, &find_namelen); 520 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 521 522 aliases = fdt_path_offset(blob, "/aliases"); 523 for (prop_offset = fdt_first_property_offset(blob, aliases); 524 prop_offset > 0; 525 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 526 const char *prop; 527 const char *name; 528 const char *slash; 529 int len, val; 530 531 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 532 debug(" - %s, %s\n", name, prop); 533 if (len < find_namelen || *prop != '/' || prop[len - 1] || 534 strncmp(name, base, base_len)) 535 continue; 536 537 slash = strrchr(prop, '/'); 538 if (strcmp(slash + 1, find_name)) 539 continue; 540 val = trailing_strtol(name); 541 if (val != -1) { 542 *seqp = val; 543 debug("Found seq %d\n", *seqp); 544 return 0; 545 } 546 } 547 548 debug("Not found\n"); 549 return -ENOENT; 550 } 551 552 const char *fdtdec_get_chosen_prop(const void *blob, const char *name) 553 { 554 int chosen_node; 555 556 if (!blob) 557 return NULL; 558 chosen_node = fdt_path_offset(blob, "/chosen"); 559 return fdt_getprop(blob, chosen_node, name, NULL); 560 } 561 562 int fdtdec_get_chosen_node(const void *blob, const char *name) 563 { 564 const char *prop; 565 566 prop = fdtdec_get_chosen_prop(blob, name); 567 if (!prop) 568 return -FDT_ERR_NOTFOUND; 569 return fdt_path_offset(blob, prop); 570 } 571 572 int fdtdec_check_fdt(void) 573 { 574 /* 575 * We must have an FDT, but we cannot panic() yet since the console 576 * is not ready. So for now, just assert(). Boards which need an early 577 * FDT (prior to console ready) will need to make their own 578 * arrangements and do their own checks. 579 */ 580 assert(!fdtdec_prepare_fdt()); 581 return 0; 582 } 583 584 /* 585 * This function is a little odd in that it accesses global data. At some 586 * point if the architecture board.c files merge this will make more sense. 587 * Even now, it is common code. 588 */ 589 int fdtdec_prepare_fdt(void) 590 { 591 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 592 fdt_check_header(gd->fdt_blob)) { 593 #ifdef CONFIG_SPL_BUILD 594 puts("Missing DTB\n"); 595 #else 596 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"); 597 # ifdef DEBUG 598 if (gd->fdt_blob) { 599 printf("fdt_blob=%p\n", gd->fdt_blob); 600 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4, 601 32, 0); 602 } 603 # endif 604 #endif 605 return -1; 606 } 607 return 0; 608 } 609 610 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 611 { 612 const u32 *phandle; 613 int lookup; 614 615 debug("%s: %s\n", __func__, prop_name); 616 phandle = fdt_getprop(blob, node, prop_name, NULL); 617 if (!phandle) 618 return -FDT_ERR_NOTFOUND; 619 620 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 621 return lookup; 622 } 623 624 /** 625 * Look up a property in a node and check that it has a minimum length. 626 * 627 * @param blob FDT blob 628 * @param node node to examine 629 * @param prop_name name of property to find 630 * @param min_len minimum property length in bytes 631 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 632 found, or -FDT_ERR_BADLAYOUT if not enough data 633 * @return pointer to cell, which is only valid if err == 0 634 */ 635 static const void *get_prop_check_min_len(const void *blob, int node, 636 const char *prop_name, int min_len, int *err) 637 { 638 const void *cell; 639 int len; 640 641 debug("%s: %s\n", __func__, prop_name); 642 cell = fdt_getprop(blob, node, prop_name, &len); 643 if (!cell) 644 *err = -FDT_ERR_NOTFOUND; 645 else if (len < min_len) 646 *err = -FDT_ERR_BADLAYOUT; 647 else 648 *err = 0; 649 return cell; 650 } 651 652 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 653 u32 *array, int count) 654 { 655 const u32 *cell; 656 int i, err = 0; 657 658 debug("%s: %s\n", __func__, prop_name); 659 cell = get_prop_check_min_len(blob, node, prop_name, 660 sizeof(u32) * count, &err); 661 if (!err) { 662 for (i = 0; i < count; i++) 663 array[i] = fdt32_to_cpu(cell[i]); 664 } 665 return err; 666 } 667 668 int fdtdec_get_int_array_count(const void *blob, int node, 669 const char *prop_name, u32 *array, int count) 670 { 671 const u32 *cell; 672 int len, elems; 673 int i; 674 675 debug("%s: %s\n", __func__, prop_name); 676 cell = fdt_getprop(blob, node, prop_name, &len); 677 if (!cell) 678 return -FDT_ERR_NOTFOUND; 679 elems = len / sizeof(u32); 680 if (count > elems) 681 count = elems; 682 for (i = 0; i < count; i++) 683 array[i] = fdt32_to_cpu(cell[i]); 684 685 return count; 686 } 687 688 const u32 *fdtdec_locate_array(const void *blob, int node, 689 const char *prop_name, int count) 690 { 691 const u32 *cell; 692 int err; 693 694 cell = get_prop_check_min_len(blob, node, prop_name, 695 sizeof(u32) * count, &err); 696 return err ? NULL : cell; 697 } 698 699 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 700 { 701 const s32 *cell; 702 int len; 703 704 debug("%s: %s\n", __func__, prop_name); 705 cell = fdt_getprop(blob, node, prop_name, &len); 706 return cell != NULL; 707 } 708 709 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 710 const char *list_name, 711 const char *cells_name, 712 int cell_count, int index, 713 struct fdtdec_phandle_args *out_args) 714 { 715 const __be32 *list, *list_end; 716 int rc = 0, size, cur_index = 0; 717 uint32_t count = 0; 718 int node = -1; 719 int phandle; 720 721 /* Retrieve the phandle list property */ 722 list = fdt_getprop(blob, src_node, list_name, &size); 723 if (!list) 724 return -ENOENT; 725 list_end = list + size / sizeof(*list); 726 727 /* Loop over the phandles until all the requested entry is found */ 728 while (list < list_end) { 729 rc = -EINVAL; 730 count = 0; 731 732 /* 733 * If phandle is 0, then it is an empty entry with no 734 * arguments. Skip forward to the next entry. 735 */ 736 phandle = be32_to_cpup(list++); 737 if (phandle) { 738 /* 739 * Find the provider node and parse the #*-cells 740 * property to determine the argument length. 741 * 742 * This is not needed if the cell count is hard-coded 743 * (i.e. cells_name not set, but cell_count is set), 744 * except when we're going to return the found node 745 * below. 746 */ 747 if (cells_name || cur_index == index) { 748 node = fdt_node_offset_by_phandle(blob, 749 phandle); 750 if (!node) { 751 debug("%s: could not find phandle\n", 752 fdt_get_name(blob, src_node, 753 NULL)); 754 goto err; 755 } 756 } 757 758 if (cells_name) { 759 count = fdtdec_get_int(blob, node, cells_name, 760 -1); 761 if (count == -1) { 762 debug("%s: could not get %s for %s\n", 763 fdt_get_name(blob, src_node, 764 NULL), 765 cells_name, 766 fdt_get_name(blob, node, 767 NULL)); 768 goto err; 769 } 770 } else { 771 count = cell_count; 772 } 773 774 /* 775 * Make sure that the arguments actually fit in the 776 * remaining property data length 777 */ 778 if (list + count > list_end) { 779 debug("%s: arguments longer than property\n", 780 fdt_get_name(blob, src_node, NULL)); 781 goto err; 782 } 783 } 784 785 /* 786 * All of the error cases above bail out of the loop, so at 787 * this point, the parsing is successful. If the requested 788 * index matches, then fill the out_args structure and return, 789 * or return -ENOENT for an empty entry. 790 */ 791 rc = -ENOENT; 792 if (cur_index == index) { 793 if (!phandle) 794 goto err; 795 796 if (out_args) { 797 int i; 798 799 if (count > MAX_PHANDLE_ARGS) { 800 debug("%s: too many arguments %d\n", 801 fdt_get_name(blob, src_node, 802 NULL), count); 803 count = MAX_PHANDLE_ARGS; 804 } 805 out_args->node = node; 806 out_args->args_count = count; 807 for (i = 0; i < count; i++) { 808 out_args->args[i] = 809 be32_to_cpup(list++); 810 } 811 } 812 813 /* Found it! return success */ 814 return 0; 815 } 816 817 node = -1; 818 list += count; 819 cur_index++; 820 } 821 822 /* 823 * Result will be one of: 824 * -ENOENT : index is for empty phandle 825 * -EINVAL : parsing error on data 826 * [1..n] : Number of phandle (count mode; when index = -1) 827 */ 828 rc = index < 0 ? cur_index : -ENOENT; 829 err: 830 return rc; 831 } 832 833 int fdtdec_get_child_count(const void *blob, int node) 834 { 835 int subnode; 836 int num = 0; 837 838 fdt_for_each_subnode(blob, subnode, node) 839 num++; 840 841 return num; 842 } 843 844 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 845 u8 *array, int count) 846 { 847 const u8 *cell; 848 int err; 849 850 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 851 if (!err) 852 memcpy(array, cell, count); 853 return err; 854 } 855 856 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 857 const char *prop_name, int count) 858 { 859 const u8 *cell; 860 int err; 861 862 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 863 if (err) 864 return NULL; 865 return cell; 866 } 867 868 int fdtdec_get_config_int(const void *blob, const char *prop_name, 869 int default_val) 870 { 871 int config_node; 872 873 debug("%s: %s\n", __func__, prop_name); 874 config_node = fdt_path_offset(blob, "/config"); 875 if (config_node < 0) 876 return default_val; 877 return fdtdec_get_int(blob, config_node, prop_name, default_val); 878 } 879 880 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 881 { 882 int config_node; 883 const void *prop; 884 885 debug("%s: %s\n", __func__, prop_name); 886 config_node = fdt_path_offset(blob, "/config"); 887 if (config_node < 0) 888 return 0; 889 prop = fdt_get_property(blob, config_node, prop_name, NULL); 890 891 return prop != NULL; 892 } 893 894 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 895 { 896 const char *nodep; 897 int nodeoffset; 898 int len; 899 900 debug("%s: %s\n", __func__, prop_name); 901 nodeoffset = fdt_path_offset(blob, "/config"); 902 if (nodeoffset < 0) 903 return NULL; 904 905 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 906 if (!nodep) 907 return NULL; 908 909 return (char *)nodep; 910 } 911 912 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 913 fdt_addr_t *basep, fdt_size_t *sizep) 914 { 915 const fdt_addr_t *cell; 916 int len; 917 918 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 919 prop_name); 920 cell = fdt_getprop(blob, node, prop_name, &len); 921 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 922 debug("cell=%p, len=%d\n", cell, len); 923 return -1; 924 } 925 926 *basep = fdt_addr_to_cpu(*cell); 927 *sizep = fdt_size_to_cpu(cell[1]); 928 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 929 (ulong)*sizep); 930 931 return 0; 932 } 933 934 /** 935 * Read a flash entry from the fdt 936 * 937 * @param blob FDT blob 938 * @param node Offset of node to read 939 * @param name Name of node being read 940 * @param entry Place to put offset and size of this node 941 * @return 0 if ok, -ve on error 942 */ 943 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 944 struct fmap_entry *entry) 945 { 946 const char *prop; 947 u32 reg[2]; 948 949 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 950 debug("Node '%s' has bad/missing 'reg' property\n", name); 951 return -FDT_ERR_NOTFOUND; 952 } 953 entry->offset = reg[0]; 954 entry->length = reg[1]; 955 entry->used = fdtdec_get_int(blob, node, "used", entry->length); 956 prop = fdt_getprop(blob, node, "compress", NULL); 957 entry->compress_algo = prop && !strcmp(prop, "lzo") ? 958 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; 959 prop = fdt_getprop(blob, node, "hash", &entry->hash_size); 960 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; 961 entry->hash = (uint8_t *)prop; 962 963 return 0; 964 } 965 966 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 967 { 968 u64 number = 0; 969 970 while (cells--) 971 number = (number << 32) | fdt32_to_cpu(*ptr++); 972 973 return number; 974 } 975 976 int fdt_get_resource(const void *fdt, int node, const char *property, 977 unsigned int index, struct fdt_resource *res) 978 { 979 const fdt32_t *ptr, *end; 980 int na, ns, len, parent; 981 unsigned int i = 0; 982 983 parent = fdt_parent_offset(fdt, node); 984 if (parent < 0) 985 return parent; 986 987 na = fdt_address_cells(fdt, parent); 988 ns = fdt_size_cells(fdt, parent); 989 990 ptr = fdt_getprop(fdt, node, property, &len); 991 if (!ptr) 992 return len; 993 994 end = ptr + len / sizeof(*ptr); 995 996 while (ptr + na + ns <= end) { 997 if (i == index) { 998 res->start = res->end = fdtdec_get_number(ptr, na); 999 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 1000 return 0; 1001 } 1002 1003 ptr += na + ns; 1004 i++; 1005 } 1006 1007 return -FDT_ERR_NOTFOUND; 1008 } 1009 1010 int fdt_get_named_resource(const void *fdt, int node, const char *property, 1011 const char *prop_names, const char *name, 1012 struct fdt_resource *res) 1013 { 1014 int index; 1015 1016 index = fdt_find_string(fdt, node, prop_names, name); 1017 if (index < 0) 1018 return index; 1019 1020 return fdt_get_resource(fdt, node, property, index, res); 1021 } 1022 1023 int fdtdec_decode_memory_region(const void *blob, int config_node, 1024 const char *mem_type, const char *suffix, 1025 fdt_addr_t *basep, fdt_size_t *sizep) 1026 { 1027 char prop_name[50]; 1028 const char *mem; 1029 fdt_size_t size, offset_size; 1030 fdt_addr_t base, offset; 1031 int node; 1032 1033 if (config_node == -1) { 1034 config_node = fdt_path_offset(blob, "/config"); 1035 if (config_node < 0) { 1036 debug("%s: Cannot find /config node\n", __func__); 1037 return -ENOENT; 1038 } 1039 } 1040 if (!suffix) 1041 suffix = ""; 1042 1043 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 1044 suffix); 1045 mem = fdt_getprop(blob, config_node, prop_name, NULL); 1046 if (!mem) { 1047 debug("%s: No memory type for '%s', using /memory\n", __func__, 1048 prop_name); 1049 mem = "/memory"; 1050 } 1051 1052 node = fdt_path_offset(blob, mem); 1053 if (node < 0) { 1054 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 1055 fdt_strerror(node)); 1056 return -ENOENT; 1057 } 1058 1059 /* 1060 * Not strictly correct - the memory may have multiple banks. We just 1061 * use the first 1062 */ 1063 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 1064 debug("%s: Failed to decode memory region %s\n", __func__, 1065 mem); 1066 return -EINVAL; 1067 } 1068 1069 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 1070 suffix); 1071 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 1072 &offset_size)) { 1073 debug("%s: Failed to decode memory region '%s'\n", __func__, 1074 prop_name); 1075 return -EINVAL; 1076 } 1077 1078 *basep = base + offset; 1079 *sizep = offset_size; 1080 1081 return 0; 1082 } 1083 1084 static int decode_timing_property(const void *blob, int node, const char *name, 1085 struct timing_entry *result) 1086 { 1087 int length, ret = 0; 1088 const u32 *prop; 1089 1090 prop = fdt_getprop(blob, node, name, &length); 1091 if (!prop) { 1092 debug("%s: could not find property %s\n", 1093 fdt_get_name(blob, node, NULL), name); 1094 return length; 1095 } 1096 1097 if (length == sizeof(u32)) { 1098 result->typ = fdtdec_get_int(blob, node, name, 0); 1099 result->min = result->typ; 1100 result->max = result->typ; 1101 } else { 1102 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3); 1103 } 1104 1105 return ret; 1106 } 1107 1108 int fdtdec_decode_display_timing(const void *blob, int parent, int index, 1109 struct display_timing *dt) 1110 { 1111 int i, node, timings_node; 1112 u32 val = 0; 1113 int ret = 0; 1114 1115 timings_node = fdt_subnode_offset(blob, parent, "display-timings"); 1116 if (timings_node < 0) 1117 return timings_node; 1118 1119 for (i = 0, node = fdt_first_subnode(blob, timings_node); 1120 node > 0 && i != index; 1121 node = fdt_next_subnode(blob, node)) 1122 i++; 1123 1124 if (node < 0) 1125 return node; 1126 1127 memset(dt, 0, sizeof(*dt)); 1128 1129 ret |= decode_timing_property(blob, node, "hback-porch", 1130 &dt->hback_porch); 1131 ret |= decode_timing_property(blob, node, "hfront-porch", 1132 &dt->hfront_porch); 1133 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive); 1134 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len); 1135 ret |= decode_timing_property(blob, node, "vback-porch", 1136 &dt->vback_porch); 1137 ret |= decode_timing_property(blob, node, "vfront-porch", 1138 &dt->vfront_porch); 1139 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive); 1140 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len); 1141 ret |= decode_timing_property(blob, node, "clock-frequency", 1142 &dt->pixelclock); 1143 1144 dt->flags = 0; 1145 val = fdtdec_get_int(blob, node, "vsync-active", -1); 1146 if (val != -1) { 1147 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : 1148 DISPLAY_FLAGS_VSYNC_LOW; 1149 } 1150 val = fdtdec_get_int(blob, node, "hsync-active", -1); 1151 if (val != -1) { 1152 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : 1153 DISPLAY_FLAGS_HSYNC_LOW; 1154 } 1155 val = fdtdec_get_int(blob, node, "de-active", -1); 1156 if (val != -1) { 1157 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : 1158 DISPLAY_FLAGS_DE_LOW; 1159 } 1160 val = fdtdec_get_int(blob, node, "pixelclk-active", -1); 1161 if (val != -1) { 1162 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : 1163 DISPLAY_FLAGS_PIXDATA_NEGEDGE; 1164 } 1165 1166 if (fdtdec_get_bool(blob, node, "interlaced")) 1167 dt->flags |= DISPLAY_FLAGS_INTERLACED; 1168 if (fdtdec_get_bool(blob, node, "doublescan")) 1169 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; 1170 if (fdtdec_get_bool(blob, node, "doubleclk")) 1171 dt->flags |= DISPLAY_FLAGS_DOUBLECLK; 1172 1173 return 0; 1174 } 1175 1176 int fdtdec_setup(void) 1177 { 1178 #if CONFIG_IS_ENABLED(OF_CONTROL) 1179 # ifdef CONFIG_OF_EMBED 1180 /* Get a pointer to the FDT */ 1181 gd->fdt_blob = __dtb_dt_begin; 1182 # elif defined CONFIG_OF_SEPARATE 1183 # ifdef CONFIG_SPL_BUILD 1184 /* FDT is at end of BSS unless it is in a different memory region */ 1185 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS)) 1186 gd->fdt_blob = (ulong *)&_image_binary_end; 1187 else 1188 gd->fdt_blob = (ulong *)&__bss_end; 1189 # else 1190 /* FDT is at end of image */ 1191 gd->fdt_blob = (ulong *)&_end; 1192 # endif 1193 # elif defined(CONFIG_OF_HOSTFILE) 1194 if (sandbox_read_fdt_from_file()) { 1195 puts("Failed to read control FDT\n"); 1196 return -1; 1197 } 1198 # endif 1199 # ifndef CONFIG_SPL_BUILD 1200 /* Allow the early environment to override the fdt address */ 1201 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, 1202 (uintptr_t)gd->fdt_blob); 1203 # endif 1204 #endif 1205 return fdtdec_prepare_fdt(); 1206 } 1207 1208 #endif /* !USE_HOSTCC */ 1209