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 <errno.h> 9 #include <serial.h> 10 #include <libfdt.h> 11 #include <fdtdec.h> 12 #include <asm/sections.h> 13 #include <linux/ctype.h> 14 15 DECLARE_GLOBAL_DATA_PTR; 16 17 /* 18 * Here are the type we know about. One day we might allow drivers to 19 * register. For now we just put them here. The COMPAT macro allows us to 20 * turn this into a sparse list later, and keeps the ID with the name. 21 */ 22 #define COMPAT(id, name) name 23 static const char * const compat_names[COMPAT_COUNT] = { 24 COMPAT(UNKNOWN, "<none>"), 25 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"), 26 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"), 27 COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"), 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_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_PCIE, "nvidia,tegra124-pcie"), 38 COMPAT(NVIDIA_TEGRA30_PCIE, "nvidia,tegra30-pcie"), 39 COMPAT(NVIDIA_TEGRA20_PCIE, "nvidia,tegra20-pcie"), 40 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"), 41 COMPAT(SMSC_LAN9215, "smsc,lan9215"), 42 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), 43 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), 44 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), 45 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), 46 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"), 47 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), 48 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"), 49 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), 50 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"), 51 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"), 52 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"), 53 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), 54 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), 55 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"), 56 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"), 57 COMPAT(GENERIC_SPI_FLASH, "spi-flash"), 58 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), 59 COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"), 60 COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645tt"), 61 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), 62 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"), 63 COMPAT(TI_TPS65090, "ti,tps65090"), 64 COMPAT(COMPAT_NXP_PTN3460, "nxp,ptn3460"), 65 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), 66 COMPAT(PARADE_PS8625, "parade,ps8625"), 67 COMPAT(INTEL_MICROCODE, "intel,microcode"), 68 COMPAT(MEMORY_SPD, "memory-spd"), 69 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"), 70 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"), 71 COMPAT(INTEL_GMA, "intel,gma"), 72 COMPAT(AMS_AS3722, "ams,as3722"), 73 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"), 74 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"), 75 COMPAT(INTEL_X86_PINCTRL, "intel,x86-pinctrl"), 76 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"), 77 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"), 78 COMPAT(COMPAT_INTEL_IRQ_ROUTER, "intel,irq-router"), 79 }; 80 81 const char *fdtdec_get_compatible(enum fdt_compat_id id) 82 { 83 /* We allow reading of the 'unknown' ID for testing purposes */ 84 assert(id >= 0 && id < COMPAT_COUNT); 85 return compat_names[id]; 86 } 87 88 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 89 const char *prop_name, fdt_size_t *sizep) 90 { 91 const fdt_addr_t *cell; 92 int len; 93 94 debug("%s: %s: ", __func__, prop_name); 95 cell = fdt_getprop(blob, node, prop_name, &len); 96 if (cell && ((!sizep && len == sizeof(fdt_addr_t)) || 97 len == sizeof(fdt_addr_t) * 2)) { 98 fdt_addr_t addr = fdt_addr_to_cpu(*cell); 99 if (sizep) { 100 const fdt_size_t *size; 101 102 size = (fdt_size_t *)((char *)cell + 103 sizeof(fdt_addr_t)); 104 *sizep = fdt_size_to_cpu(*size); 105 debug("addr=%08lx, size=%08x\n", 106 (ulong)addr, *sizep); 107 } else { 108 debug("%08lx\n", (ulong)addr); 109 } 110 return addr; 111 } 112 debug("(not found)\n"); 113 return FDT_ADDR_T_NONE; 114 } 115 116 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 117 const char *prop_name) 118 { 119 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 120 } 121 122 #ifdef CONFIG_PCI 123 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 124 const char *prop_name, struct fdt_pci_addr *addr) 125 { 126 const u32 *cell; 127 int len; 128 int ret = -ENOENT; 129 130 debug("%s: %s: ", __func__, prop_name); 131 132 /* 133 * If we follow the pci bus bindings strictly, we should check 134 * the value of the node's parent node's #address-cells and 135 * #size-cells. They need to be 3 and 2 accordingly. However, 136 * for simplicity we skip the check here. 137 */ 138 cell = fdt_getprop(blob, node, prop_name, &len); 139 if (!cell) 140 goto fail; 141 142 if ((len % FDT_PCI_REG_SIZE) == 0) { 143 int num = len / FDT_PCI_REG_SIZE; 144 int i; 145 146 for (i = 0; i < num; i++) { 147 debug("pci address #%d: %08lx %08lx %08lx\n", i, 148 (ulong)fdt_addr_to_cpu(cell[0]), 149 (ulong)fdt_addr_to_cpu(cell[1]), 150 (ulong)fdt_addr_to_cpu(cell[2])); 151 if ((fdt_addr_to_cpu(*cell) & type) == type) { 152 addr->phys_hi = fdt_addr_to_cpu(cell[0]); 153 addr->phys_mid = fdt_addr_to_cpu(cell[1]); 154 addr->phys_lo = fdt_addr_to_cpu(cell[2]); 155 break; 156 } else { 157 cell += (FDT_PCI_ADDR_CELLS + 158 FDT_PCI_SIZE_CELLS); 159 } 160 } 161 162 if (i == num) { 163 ret = -ENXIO; 164 goto fail; 165 } 166 167 return 0; 168 } else { 169 ret = -EINVAL; 170 } 171 172 fail: 173 debug("(not found)\n"); 174 return ret; 175 } 176 177 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 178 { 179 const char *list, *end; 180 int len; 181 182 list = fdt_getprop(blob, node, "compatible", &len); 183 if (!list) 184 return -ENOENT; 185 186 end = list + len; 187 while (list < end) { 188 char *s; 189 190 len = strlen(list); 191 if (len >= strlen("pciVVVV,DDDD")) { 192 s = strstr(list, "pci"); 193 194 /* 195 * check if the string is something like pciVVVV,DDDD.RR 196 * or just pciVVVV,DDDD 197 */ 198 if (s && s[7] == ',' && 199 (s[12] == '.' || s[12] == 0)) { 200 s += 3; 201 *vendor = simple_strtol(s, NULL, 16); 202 203 s += 5; 204 *device = simple_strtol(s, NULL, 16); 205 206 return 0; 207 } 208 } else { 209 list += (len + 1); 210 } 211 } 212 213 return -ENOENT; 214 } 215 216 int fdtdec_get_pci_bdf(const void *blob, int node, 217 struct fdt_pci_addr *addr, pci_dev_t *bdf) 218 { 219 u16 dt_vendor, dt_device, vendor, device; 220 int ret; 221 222 /* get vendor id & device id from the compatible string */ 223 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device); 224 if (ret) 225 return ret; 226 227 /* extract the bdf from fdt_pci_addr */ 228 *bdf = addr->phys_hi & 0xffff00; 229 230 /* read vendor id & device id based on bdf */ 231 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor); 232 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device); 233 234 /* 235 * Note there are two places in the device tree to fully describe 236 * a pci device: one is via compatible string with a format of 237 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in 238 * the device node's reg address property. We read the vendor id 239 * and device id based on bdf and compare the values with the 240 * "VVVV,DDDD". If they are the same, then we are good to use bdf 241 * to read device's bar. But if they are different, we have to rely 242 * on the vendor id and device id extracted from the compatible 243 * string and locate the real bdf by pci_find_device(). This is 244 * because normally we may only know device's device number and 245 * function number when writing device tree. The bus number is 246 * dynamically assigned during the pci enumeration process. 247 */ 248 if ((dt_vendor != vendor) || (dt_device != device)) { 249 *bdf = pci_find_device(dt_vendor, dt_device, 0); 250 if (*bdf == -1) 251 return -ENODEV; 252 } 253 254 return 0; 255 } 256 257 int fdtdec_get_pci_bar32(const void *blob, int node, 258 struct fdt_pci_addr *addr, u32 *bar) 259 { 260 pci_dev_t bdf; 261 int barnum; 262 int ret; 263 264 /* get pci devices's bdf */ 265 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf); 266 if (ret) 267 return ret; 268 269 /* extract the bar number from fdt_pci_addr */ 270 barnum = addr->phys_hi & 0xff; 271 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) 272 return -EINVAL; 273 274 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; 275 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum); 276 277 return 0; 278 } 279 #endif 280 281 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 282 uint64_t default_val) 283 { 284 const uint64_t *cell64; 285 int length; 286 287 cell64 = fdt_getprop(blob, node, prop_name, &length); 288 if (!cell64 || length < sizeof(*cell64)) 289 return default_val; 290 291 return fdt64_to_cpu(*cell64); 292 } 293 294 int fdtdec_get_is_enabled(const void *blob, int node) 295 { 296 const char *cell; 297 298 /* 299 * It should say "okay", so only allow that. Some fdts use "ok" but 300 * this is a bug. Please fix your device tree source file. See here 301 * for discussion: 302 * 303 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 304 */ 305 cell = fdt_getprop(blob, node, "status", NULL); 306 if (cell) 307 return 0 == strcmp(cell, "okay"); 308 return 1; 309 } 310 311 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 312 { 313 enum fdt_compat_id id; 314 315 /* Search our drivers */ 316 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 317 if (0 == fdt_node_check_compatible(blob, node, 318 compat_names[id])) 319 return id; 320 return COMPAT_UNKNOWN; 321 } 322 323 int fdtdec_next_compatible(const void *blob, int node, 324 enum fdt_compat_id id) 325 { 326 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 327 } 328 329 int fdtdec_next_compatible_subnode(const void *blob, int node, 330 enum fdt_compat_id id, int *depthp) 331 { 332 do { 333 node = fdt_next_node(blob, node, depthp); 334 } while (*depthp > 1); 335 336 /* If this is a direct subnode, and compatible, return it */ 337 if (*depthp == 1 && 0 == fdt_node_check_compatible( 338 blob, node, compat_names[id])) 339 return node; 340 341 return -FDT_ERR_NOTFOUND; 342 } 343 344 int fdtdec_next_alias(const void *blob, const char *name, 345 enum fdt_compat_id id, int *upto) 346 { 347 #define MAX_STR_LEN 20 348 char str[MAX_STR_LEN + 20]; 349 int node, err; 350 351 /* snprintf() is not available */ 352 assert(strlen(name) < MAX_STR_LEN); 353 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 354 node = fdt_path_offset(blob, str); 355 if (node < 0) 356 return node; 357 err = fdt_node_check_compatible(blob, node, compat_names[id]); 358 if (err < 0) 359 return err; 360 if (err) 361 return -FDT_ERR_NOTFOUND; 362 (*upto)++; 363 return node; 364 } 365 366 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 367 enum fdt_compat_id id, int *node_list, int maxcount) 368 { 369 memset(node_list, '\0', sizeof(*node_list) * maxcount); 370 371 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 372 } 373 374 /* TODO: Can we tighten this code up a little? */ 375 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 376 enum fdt_compat_id id, int *node_list, int maxcount) 377 { 378 int name_len = strlen(name); 379 int nodes[maxcount]; 380 int num_found = 0; 381 int offset, node; 382 int alias_node; 383 int count; 384 int i, j; 385 386 /* find the alias node if present */ 387 alias_node = fdt_path_offset(blob, "/aliases"); 388 389 /* 390 * start with nothing, and we can assume that the root node can't 391 * match 392 */ 393 memset(nodes, '\0', sizeof(nodes)); 394 395 /* First find all the compatible nodes */ 396 for (node = count = 0; node >= 0 && count < maxcount;) { 397 node = fdtdec_next_compatible(blob, node, id); 398 if (node >= 0) 399 nodes[count++] = node; 400 } 401 if (node >= 0) 402 debug("%s: warning: maxcount exceeded with alias '%s'\n", 403 __func__, name); 404 405 /* Now find all the aliases */ 406 for (offset = fdt_first_property_offset(blob, alias_node); 407 offset > 0; 408 offset = fdt_next_property_offset(blob, offset)) { 409 const struct fdt_property *prop; 410 const char *path; 411 int number; 412 int found; 413 414 node = 0; 415 prop = fdt_get_property_by_offset(blob, offset, NULL); 416 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 417 if (prop->len && 0 == strncmp(path, name, name_len)) 418 node = fdt_path_offset(blob, prop->data); 419 if (node <= 0) 420 continue; 421 422 /* Get the alias number */ 423 number = simple_strtoul(path + name_len, NULL, 10); 424 if (number < 0 || number >= maxcount) { 425 debug("%s: warning: alias '%s' is out of range\n", 426 __func__, path); 427 continue; 428 } 429 430 /* Make sure the node we found is actually in our list! */ 431 found = -1; 432 for (j = 0; j < count; j++) 433 if (nodes[j] == node) { 434 found = j; 435 break; 436 } 437 438 if (found == -1) { 439 debug("%s: warning: alias '%s' points to a node " 440 "'%s' that is missing or is not compatible " 441 " with '%s'\n", __func__, path, 442 fdt_get_name(blob, node, NULL), 443 compat_names[id]); 444 continue; 445 } 446 447 /* 448 * Add this node to our list in the right place, and mark 449 * it as done. 450 */ 451 if (fdtdec_get_is_enabled(blob, node)) { 452 if (node_list[number]) { 453 debug("%s: warning: alias '%s' requires that " 454 "a node be placed in the list in a " 455 "position which is already filled by " 456 "node '%s'\n", __func__, path, 457 fdt_get_name(blob, node, NULL)); 458 continue; 459 } 460 node_list[number] = node; 461 if (number >= num_found) 462 num_found = number + 1; 463 } 464 nodes[found] = 0; 465 } 466 467 /* Add any nodes not mentioned by an alias */ 468 for (i = j = 0; i < maxcount; i++) { 469 if (!node_list[i]) { 470 for (; j < maxcount; j++) 471 if (nodes[j] && 472 fdtdec_get_is_enabled(blob, nodes[j])) 473 break; 474 475 /* Have we run out of nodes to add? */ 476 if (j == maxcount) 477 break; 478 479 assert(!node_list[i]); 480 node_list[i] = nodes[j++]; 481 if (i >= num_found) 482 num_found = i + 1; 483 } 484 } 485 486 return num_found; 487 } 488 489 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 490 int *seqp) 491 { 492 int base_len = strlen(base); 493 const char *find_name; 494 int find_namelen; 495 int prop_offset; 496 int aliases; 497 498 find_name = fdt_get_name(blob, offset, &find_namelen); 499 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 500 501 aliases = fdt_path_offset(blob, "/aliases"); 502 for (prop_offset = fdt_first_property_offset(blob, aliases); 503 prop_offset > 0; 504 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 505 const char *prop; 506 const char *name; 507 const char *slash; 508 const char *p; 509 int len; 510 511 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 512 debug(" - %s, %s\n", name, prop); 513 if (len < find_namelen || *prop != '/' || prop[len - 1] || 514 strncmp(name, base, base_len)) 515 continue; 516 517 slash = strrchr(prop, '/'); 518 if (strcmp(slash + 1, find_name)) 519 continue; 520 for (p = name + strlen(name) - 1; p > name; p--) { 521 if (!isdigit(*p)) { 522 *seqp = simple_strtoul(p + 1, NULL, 10); 523 debug("Found seq %d\n", *seqp); 524 return 0; 525 } 526 } 527 } 528 529 debug("Not found\n"); 530 return -ENOENT; 531 } 532 533 int fdtdec_get_chosen_node(const void *blob, const char *name) 534 { 535 const char *prop; 536 int chosen_node; 537 int len; 538 539 if (!blob) 540 return -FDT_ERR_NOTFOUND; 541 chosen_node = fdt_path_offset(blob, "/chosen"); 542 prop = fdt_getprop(blob, chosen_node, name, &len); 543 if (!prop) 544 return -FDT_ERR_NOTFOUND; 545 return fdt_path_offset(blob, prop); 546 } 547 548 int fdtdec_check_fdt(void) 549 { 550 /* 551 * We must have an FDT, but we cannot panic() yet since the console 552 * is not ready. So for now, just assert(). Boards which need an early 553 * FDT (prior to console ready) will need to make their own 554 * arrangements and do their own checks. 555 */ 556 assert(!fdtdec_prepare_fdt()); 557 return 0; 558 } 559 560 /* 561 * This function is a little odd in that it accesses global data. At some 562 * point if the architecture board.c files merge this will make more sense. 563 * Even now, it is common code. 564 */ 565 int fdtdec_prepare_fdt(void) 566 { 567 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 568 fdt_check_header(gd->fdt_blob)) { 569 #ifdef CONFIG_SPL_BUILD 570 puts("Missing DTB\n"); 571 #else 572 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"); 573 #endif 574 return -1; 575 } 576 return 0; 577 } 578 579 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 580 { 581 const u32 *phandle; 582 int lookup; 583 584 debug("%s: %s\n", __func__, prop_name); 585 phandle = fdt_getprop(blob, node, prop_name, NULL); 586 if (!phandle) 587 return -FDT_ERR_NOTFOUND; 588 589 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 590 return lookup; 591 } 592 593 /** 594 * Look up a property in a node and check that it has a minimum length. 595 * 596 * @param blob FDT blob 597 * @param node node to examine 598 * @param prop_name name of property to find 599 * @param min_len minimum property length in bytes 600 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 601 found, or -FDT_ERR_BADLAYOUT if not enough data 602 * @return pointer to cell, which is only valid if err == 0 603 */ 604 static const void *get_prop_check_min_len(const void *blob, int node, 605 const char *prop_name, int min_len, int *err) 606 { 607 const void *cell; 608 int len; 609 610 debug("%s: %s\n", __func__, prop_name); 611 cell = fdt_getprop(blob, node, prop_name, &len); 612 if (!cell) 613 *err = -FDT_ERR_NOTFOUND; 614 else if (len < min_len) 615 *err = -FDT_ERR_BADLAYOUT; 616 else 617 *err = 0; 618 return cell; 619 } 620 621 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 622 u32 *array, int count) 623 { 624 const u32 *cell; 625 int i, err = 0; 626 627 debug("%s: %s\n", __func__, prop_name); 628 cell = get_prop_check_min_len(blob, node, prop_name, 629 sizeof(u32) * count, &err); 630 if (!err) { 631 for (i = 0; i < count; i++) 632 array[i] = fdt32_to_cpu(cell[i]); 633 } 634 return err; 635 } 636 637 int fdtdec_get_int_array_count(const void *blob, int node, 638 const char *prop_name, u32 *array, int count) 639 { 640 const u32 *cell; 641 int len, elems; 642 int i; 643 644 debug("%s: %s\n", __func__, prop_name); 645 cell = fdt_getprop(blob, node, prop_name, &len); 646 if (!cell) 647 return -FDT_ERR_NOTFOUND; 648 elems = len / sizeof(u32); 649 if (count > elems) 650 count = elems; 651 for (i = 0; i < count; i++) 652 array[i] = fdt32_to_cpu(cell[i]); 653 654 return count; 655 } 656 657 const u32 *fdtdec_locate_array(const void *blob, int node, 658 const char *prop_name, int count) 659 { 660 const u32 *cell; 661 int err; 662 663 cell = get_prop_check_min_len(blob, node, prop_name, 664 sizeof(u32) * count, &err); 665 return err ? NULL : cell; 666 } 667 668 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 669 { 670 const s32 *cell; 671 int len; 672 673 debug("%s: %s\n", __func__, prop_name); 674 cell = fdt_getprop(blob, node, prop_name, &len); 675 return cell != NULL; 676 } 677 678 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 679 const char *list_name, 680 const char *cells_name, 681 int cell_count, int index, 682 struct fdtdec_phandle_args *out_args) 683 { 684 const __be32 *list, *list_end; 685 int rc = 0, size, cur_index = 0; 686 uint32_t count = 0; 687 int node = -1; 688 int phandle; 689 690 /* Retrieve the phandle list property */ 691 list = fdt_getprop(blob, src_node, list_name, &size); 692 if (!list) 693 return -ENOENT; 694 list_end = list + size / sizeof(*list); 695 696 /* Loop over the phandles until all the requested entry is found */ 697 while (list < list_end) { 698 rc = -EINVAL; 699 count = 0; 700 701 /* 702 * If phandle is 0, then it is an empty entry with no 703 * arguments. Skip forward to the next entry. 704 */ 705 phandle = be32_to_cpup(list++); 706 if (phandle) { 707 /* 708 * Find the provider node and parse the #*-cells 709 * property to determine the argument length. 710 * 711 * This is not needed if the cell count is hard-coded 712 * (i.e. cells_name not set, but cell_count is set), 713 * except when we're going to return the found node 714 * below. 715 */ 716 if (cells_name || cur_index == index) { 717 node = fdt_node_offset_by_phandle(blob, 718 phandle); 719 if (!node) { 720 debug("%s: could not find phandle\n", 721 fdt_get_name(blob, src_node, 722 NULL)); 723 goto err; 724 } 725 } 726 727 if (cells_name) { 728 count = fdtdec_get_int(blob, node, cells_name, 729 -1); 730 if (count == -1) { 731 debug("%s: could not get %s for %s\n", 732 fdt_get_name(blob, src_node, 733 NULL), 734 cells_name, 735 fdt_get_name(blob, node, 736 NULL)); 737 goto err; 738 } 739 } else { 740 count = cell_count; 741 } 742 743 /* 744 * Make sure that the arguments actually fit in the 745 * remaining property data length 746 */ 747 if (list + count > list_end) { 748 debug("%s: arguments longer than property\n", 749 fdt_get_name(blob, src_node, NULL)); 750 goto err; 751 } 752 } 753 754 /* 755 * All of the error cases above bail out of the loop, so at 756 * this point, the parsing is successful. If the requested 757 * index matches, then fill the out_args structure and return, 758 * or return -ENOENT for an empty entry. 759 */ 760 rc = -ENOENT; 761 if (cur_index == index) { 762 if (!phandle) 763 goto err; 764 765 if (out_args) { 766 int i; 767 768 if (count > MAX_PHANDLE_ARGS) { 769 debug("%s: too many arguments %d\n", 770 fdt_get_name(blob, src_node, 771 NULL), count); 772 count = MAX_PHANDLE_ARGS; 773 } 774 out_args->node = node; 775 out_args->args_count = count; 776 for (i = 0; i < count; i++) { 777 out_args->args[i] = 778 be32_to_cpup(list++); 779 } 780 } 781 782 /* Found it! return success */ 783 return 0; 784 } 785 786 node = -1; 787 list += count; 788 cur_index++; 789 } 790 791 /* 792 * Result will be one of: 793 * -ENOENT : index is for empty phandle 794 * -EINVAL : parsing error on data 795 * [1..n] : Number of phandle (count mode; when index = -1) 796 */ 797 rc = index < 0 ? cur_index : -ENOENT; 798 err: 799 return rc; 800 } 801 802 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 803 u8 *array, int count) 804 { 805 const u8 *cell; 806 int err; 807 808 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 809 if (!err) 810 memcpy(array, cell, count); 811 return err; 812 } 813 814 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 815 const char *prop_name, int count) 816 { 817 const u8 *cell; 818 int err; 819 820 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 821 if (err) 822 return NULL; 823 return cell; 824 } 825 826 int fdtdec_get_config_int(const void *blob, const char *prop_name, 827 int default_val) 828 { 829 int config_node; 830 831 debug("%s: %s\n", __func__, prop_name); 832 config_node = fdt_path_offset(blob, "/config"); 833 if (config_node < 0) 834 return default_val; 835 return fdtdec_get_int(blob, config_node, prop_name, default_val); 836 } 837 838 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 839 { 840 int config_node; 841 const void *prop; 842 843 debug("%s: %s\n", __func__, prop_name); 844 config_node = fdt_path_offset(blob, "/config"); 845 if (config_node < 0) 846 return 0; 847 prop = fdt_get_property(blob, config_node, prop_name, NULL); 848 849 return prop != NULL; 850 } 851 852 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 853 { 854 const char *nodep; 855 int nodeoffset; 856 int len; 857 858 debug("%s: %s\n", __func__, prop_name); 859 nodeoffset = fdt_path_offset(blob, "/config"); 860 if (nodeoffset < 0) 861 return NULL; 862 863 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 864 if (!nodep) 865 return NULL; 866 867 return (char *)nodep; 868 } 869 870 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 871 fdt_addr_t *basep, fdt_size_t *sizep) 872 { 873 const fdt_addr_t *cell; 874 int len; 875 876 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 877 prop_name); 878 cell = fdt_getprop(blob, node, prop_name, &len); 879 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 880 debug("cell=%p, len=%d\n", cell, len); 881 return -1; 882 } 883 884 *basep = fdt_addr_to_cpu(*cell); 885 *sizep = fdt_size_to_cpu(cell[1]); 886 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 887 (ulong)*sizep); 888 889 return 0; 890 } 891 892 /** 893 * Read a flash entry from the fdt 894 * 895 * @param blob FDT blob 896 * @param node Offset of node to read 897 * @param name Name of node being read 898 * @param entry Place to put offset and size of this node 899 * @return 0 if ok, -ve on error 900 */ 901 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 902 struct fmap_entry *entry) 903 { 904 const char *prop; 905 u32 reg[2]; 906 907 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 908 debug("Node '%s' has bad/missing 'reg' property\n", name); 909 return -FDT_ERR_NOTFOUND; 910 } 911 entry->offset = reg[0]; 912 entry->length = reg[1]; 913 entry->used = fdtdec_get_int(blob, node, "used", entry->length); 914 prop = fdt_getprop(blob, node, "compress", NULL); 915 entry->compress_algo = prop && !strcmp(prop, "lzo") ? 916 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; 917 prop = fdt_getprop(blob, node, "hash", &entry->hash_size); 918 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; 919 entry->hash = (uint8_t *)prop; 920 921 return 0; 922 } 923 924 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 925 { 926 u64 number = 0; 927 928 while (cells--) 929 number = (number << 32) | fdt32_to_cpu(*ptr++); 930 931 return number; 932 } 933 934 int fdt_get_resource(const void *fdt, int node, const char *property, 935 unsigned int index, struct fdt_resource *res) 936 { 937 const fdt32_t *ptr, *end; 938 int na, ns, len, parent; 939 unsigned int i = 0; 940 941 parent = fdt_parent_offset(fdt, node); 942 if (parent < 0) 943 return parent; 944 945 na = fdt_address_cells(fdt, parent); 946 ns = fdt_size_cells(fdt, parent); 947 948 ptr = fdt_getprop(fdt, node, property, &len); 949 if (!ptr) 950 return len; 951 952 end = ptr + len / sizeof(*ptr); 953 954 while (ptr + na + ns <= end) { 955 if (i == index) { 956 res->start = res->end = fdtdec_get_number(ptr, na); 957 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 958 return 0; 959 } 960 961 ptr += na + ns; 962 i++; 963 } 964 965 return -FDT_ERR_NOTFOUND; 966 } 967 968 int fdt_get_named_resource(const void *fdt, int node, const char *property, 969 const char *prop_names, const char *name, 970 struct fdt_resource *res) 971 { 972 int index; 973 974 index = fdt_find_string(fdt, node, prop_names, name); 975 if (index < 0) 976 return index; 977 978 return fdt_get_resource(fdt, node, property, index, res); 979 } 980 981 int fdtdec_decode_memory_region(const void *blob, int config_node, 982 const char *mem_type, const char *suffix, 983 fdt_addr_t *basep, fdt_size_t *sizep) 984 { 985 char prop_name[50]; 986 const char *mem; 987 fdt_size_t size, offset_size; 988 fdt_addr_t base, offset; 989 int node; 990 991 if (config_node == -1) { 992 config_node = fdt_path_offset(blob, "/config"); 993 if (config_node < 0) { 994 debug("%s: Cannot find /config node\n", __func__); 995 return -ENOENT; 996 } 997 } 998 if (!suffix) 999 suffix = ""; 1000 1001 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 1002 suffix); 1003 mem = fdt_getprop(blob, config_node, prop_name, NULL); 1004 if (!mem) { 1005 debug("%s: No memory type for '%s', using /memory\n", __func__, 1006 prop_name); 1007 mem = "/memory"; 1008 } 1009 1010 node = fdt_path_offset(blob, mem); 1011 if (node < 0) { 1012 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 1013 fdt_strerror(node)); 1014 return -ENOENT; 1015 } 1016 1017 /* 1018 * Not strictly correct - the memory may have multiple banks. We just 1019 * use the first 1020 */ 1021 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 1022 debug("%s: Failed to decode memory region %s\n", __func__, 1023 mem); 1024 return -EINVAL; 1025 } 1026 1027 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 1028 suffix); 1029 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 1030 &offset_size)) { 1031 debug("%s: Failed to decode memory region '%s'\n", __func__, 1032 prop_name); 1033 return -EINVAL; 1034 } 1035 1036 *basep = base + offset; 1037 *sizep = offset_size; 1038 1039 return 0; 1040 } 1041 1042 static int decode_timing_property(const void *blob, int node, const char *name, 1043 struct timing_entry *result) 1044 { 1045 int length, ret = 0; 1046 const u32 *prop; 1047 1048 prop = fdt_getprop(blob, node, name, &length); 1049 if (!prop) { 1050 debug("%s: could not find property %s\n", 1051 fdt_get_name(blob, node, NULL), name); 1052 return length; 1053 } 1054 1055 if (length == sizeof(u32)) { 1056 result->typ = fdtdec_get_int(blob, node, name, 0); 1057 result->min = result->typ; 1058 result->max = result->typ; 1059 } else { 1060 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3); 1061 } 1062 1063 return ret; 1064 } 1065 1066 int fdtdec_decode_display_timing(const void *blob, int parent, int index, 1067 struct display_timing *dt) 1068 { 1069 int i, node, timings_node; 1070 u32 val = 0; 1071 int ret = 0; 1072 1073 timings_node = fdt_subnode_offset(blob, parent, "display-timings"); 1074 if (timings_node < 0) 1075 return timings_node; 1076 1077 for (i = 0, node = fdt_first_subnode(blob, timings_node); 1078 node > 0 && i != index; 1079 node = fdt_next_subnode(blob, node)) 1080 i++; 1081 1082 if (node < 0) 1083 return node; 1084 1085 memset(dt, 0, sizeof(*dt)); 1086 1087 ret |= decode_timing_property(blob, node, "hback-porch", 1088 &dt->hback_porch); 1089 ret |= decode_timing_property(blob, node, "hfront-porch", 1090 &dt->hfront_porch); 1091 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive); 1092 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len); 1093 ret |= decode_timing_property(blob, node, "vback-porch", 1094 &dt->vback_porch); 1095 ret |= decode_timing_property(blob, node, "vfront-porch", 1096 &dt->vfront_porch); 1097 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive); 1098 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len); 1099 ret |= decode_timing_property(blob, node, "clock-frequency", 1100 &dt->pixelclock); 1101 1102 dt->flags = 0; 1103 val = fdtdec_get_int(blob, node, "vsync-active", -1); 1104 if (val != -1) { 1105 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : 1106 DISPLAY_FLAGS_VSYNC_LOW; 1107 } 1108 val = fdtdec_get_int(blob, node, "hsync-active", -1); 1109 if (val != -1) { 1110 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : 1111 DISPLAY_FLAGS_HSYNC_LOW; 1112 } 1113 val = fdtdec_get_int(blob, node, "de-active", -1); 1114 if (val != -1) { 1115 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : 1116 DISPLAY_FLAGS_DE_LOW; 1117 } 1118 val = fdtdec_get_int(blob, node, "pixelclk-active", -1); 1119 if (val != -1) { 1120 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : 1121 DISPLAY_FLAGS_PIXDATA_NEGEDGE; 1122 } 1123 1124 if (fdtdec_get_bool(blob, node, "interlaced")) 1125 dt->flags |= DISPLAY_FLAGS_INTERLACED; 1126 if (fdtdec_get_bool(blob, node, "doublescan")) 1127 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; 1128 if (fdtdec_get_bool(blob, node, "doubleclk")) 1129 dt->flags |= DISPLAY_FLAGS_DOUBLECLK; 1130 1131 return 0; 1132 } 1133 1134 int fdtdec_setup(void) 1135 { 1136 #ifdef CONFIG_OF_CONTROL 1137 # ifdef CONFIG_OF_EMBED 1138 /* Get a pointer to the FDT */ 1139 gd->fdt_blob = __dtb_dt_begin; 1140 # elif defined CONFIG_OF_SEPARATE 1141 # ifdef CONFIG_SPL_BUILD 1142 /* FDT is at end of BSS */ 1143 gd->fdt_blob = (ulong *)&__bss_end; 1144 # else 1145 /* FDT is at end of image */ 1146 gd->fdt_blob = (ulong *)&_end; 1147 #endif 1148 # elif defined(CONFIG_OF_HOSTFILE) 1149 if (sandbox_read_fdt_from_file()) { 1150 puts("Failed to read control FDT\n"); 1151 return -1; 1152 } 1153 # endif 1154 # ifndef CONFIG_SPL_BUILD 1155 /* Allow the early environment to override the fdt address */ 1156 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, 1157 (uintptr_t)gd->fdt_blob); 1158 # endif 1159 #endif 1160 return fdtdec_prepare_fdt(); 1161 } 1162 1163 #endif /* !USE_HOSTCC */ 1164