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_USB, "nvidia,tegra20-ehci"), 26 COMPAT(NVIDIA_TEGRA30_USB, "nvidia,tegra30-ehci"), 27 COMPAT(NVIDIA_TEGRA114_USB, "nvidia,tegra114-ehci"), 28 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"), 29 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"), 30 COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"), 31 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"), 32 COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"), 33 COMPAT(NVIDIA_TEGRA124_DC, "nvidia,tegra124-dc"), 34 COMPAT(NVIDIA_TEGRA124_SOR, "nvidia,tegra124-sor"), 35 COMPAT(NVIDIA_TEGRA124_PMC, "nvidia,tegra124-pmc"), 36 COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"), 37 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"), 38 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"), 39 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"), 40 COMPAT(NVIDIA_TEGRA124_PCIE, "nvidia,tegra124-pcie"), 41 COMPAT(NVIDIA_TEGRA30_PCIE, "nvidia,tegra30-pcie"), 42 COMPAT(NVIDIA_TEGRA20_PCIE, "nvidia,tegra20-pcie"), 43 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"), 44 COMPAT(SMSC_LAN9215, "smsc,lan9215"), 45 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), 46 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), 47 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), 48 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), 49 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"), 50 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), 51 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"), 52 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), 53 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"), 54 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"), 55 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"), 56 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), 57 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), 58 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"), 59 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"), 60 COMPAT(GENERIC_SPI_FLASH, "spi-flash"), 61 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), 62 COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"), 63 COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645tt"), 64 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), 65 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"), 66 COMPAT(TI_TPS65090, "ti,tps65090"), 67 COMPAT(COMPAT_NXP_PTN3460, "nxp,ptn3460"), 68 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), 69 COMPAT(PARADE_PS8625, "parade,ps8625"), 70 COMPAT(INTEL_MICROCODE, "intel,microcode"), 71 COMPAT(MEMORY_SPD, "memory-spd"), 72 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"), 73 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"), 74 COMPAT(INTEL_GMA, "intel,gma"), 75 COMPAT(AMS_AS3722, "ams,as3722"), 76 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"), 77 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"), 78 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"), 79 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"), 80 }; 81 82 const char *fdtdec_get_compatible(enum fdt_compat_id id) 83 { 84 /* We allow reading of the 'unknown' ID for testing purposes */ 85 assert(id >= 0 && id < COMPAT_COUNT); 86 return compat_names[id]; 87 } 88 89 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 90 const char *prop_name, fdt_size_t *sizep) 91 { 92 const fdt_addr_t *cell; 93 int len; 94 95 debug("%s: %s: ", __func__, prop_name); 96 cell = fdt_getprop(blob, node, prop_name, &len); 97 if (cell && ((!sizep && len == sizeof(fdt_addr_t)) || 98 len == sizeof(fdt_addr_t) * 2)) { 99 fdt_addr_t addr = fdt_addr_to_cpu(*cell); 100 if (sizep) { 101 const fdt_size_t *size; 102 103 size = (fdt_size_t *)((char *)cell + 104 sizeof(fdt_addr_t)); 105 *sizep = fdt_size_to_cpu(*size); 106 debug("addr=%08lx, size=%08x\n", 107 (ulong)addr, *sizep); 108 } else { 109 debug("%08lx\n", (ulong)addr); 110 } 111 return addr; 112 } 113 debug("(not found)\n"); 114 return FDT_ADDR_T_NONE; 115 } 116 117 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 118 const char *prop_name) 119 { 120 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 121 } 122 123 #ifdef CONFIG_PCI 124 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 125 const char *prop_name, struct fdt_pci_addr *addr) 126 { 127 const u32 *cell; 128 int len; 129 int ret = -ENOENT; 130 131 debug("%s: %s: ", __func__, prop_name); 132 133 /* 134 * If we follow the pci bus bindings strictly, we should check 135 * the value of the node's parent node's #address-cells and 136 * #size-cells. They need to be 3 and 2 accordingly. However, 137 * for simplicity we skip the check here. 138 */ 139 cell = fdt_getprop(blob, node, prop_name, &len); 140 if (!cell) 141 goto fail; 142 143 if ((len % FDT_PCI_REG_SIZE) == 0) { 144 int num = len / FDT_PCI_REG_SIZE; 145 int i; 146 147 for (i = 0; i < num; i++) { 148 debug("pci address #%d: %08lx %08lx %08lx\n", i, 149 (ulong)fdt_addr_to_cpu(cell[0]), 150 (ulong)fdt_addr_to_cpu(cell[1]), 151 (ulong)fdt_addr_to_cpu(cell[2])); 152 if ((fdt_addr_to_cpu(*cell) & type) == type) { 153 addr->phys_hi = fdt_addr_to_cpu(cell[0]); 154 addr->phys_mid = fdt_addr_to_cpu(cell[1]); 155 addr->phys_lo = fdt_addr_to_cpu(cell[2]); 156 break; 157 } else { 158 cell += (FDT_PCI_ADDR_CELLS + 159 FDT_PCI_SIZE_CELLS); 160 } 161 } 162 163 if (i == num) { 164 ret = -ENXIO; 165 goto fail; 166 } 167 168 return 0; 169 } else { 170 ret = -EINVAL; 171 } 172 173 fail: 174 debug("(not found)\n"); 175 return ret; 176 } 177 178 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 179 { 180 const char *list, *end; 181 int len; 182 183 list = fdt_getprop(blob, node, "compatible", &len); 184 if (!list) 185 return -ENOENT; 186 187 end = list + len; 188 while (list < end) { 189 char *s; 190 191 len = strlen(list); 192 if (len >= strlen("pciVVVV,DDDD")) { 193 s = strstr(list, "pci"); 194 195 /* 196 * check if the string is something like pciVVVV,DDDD.RR 197 * or just pciVVVV,DDDD 198 */ 199 if (s && s[7] == ',' && 200 (s[12] == '.' || s[12] == 0)) { 201 s += 3; 202 *vendor = simple_strtol(s, NULL, 16); 203 204 s += 5; 205 *device = simple_strtol(s, NULL, 16); 206 207 return 0; 208 } 209 } else { 210 list += (len + 1); 211 } 212 } 213 214 return -ENOENT; 215 } 216 217 int fdtdec_get_pci_bdf(const void *blob, int node, 218 struct fdt_pci_addr *addr, pci_dev_t *bdf) 219 { 220 u16 dt_vendor, dt_device, vendor, device; 221 int ret; 222 223 /* get vendor id & device id from the compatible string */ 224 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device); 225 if (ret) 226 return ret; 227 228 /* extract the bdf from fdt_pci_addr */ 229 *bdf = addr->phys_hi & 0xffff00; 230 231 /* read vendor id & device id based on bdf */ 232 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor); 233 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device); 234 235 /* 236 * Note there are two places in the device tree to fully describe 237 * a pci device: one is via compatible string with a format of 238 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in 239 * the device node's reg address property. We read the vendor id 240 * and device id based on bdf and compare the values with the 241 * "VVVV,DDDD". If they are the same, then we are good to use bdf 242 * to read device's bar. But if they are different, we have to rely 243 * on the vendor id and device id extracted from the compatible 244 * string and locate the real bdf by pci_find_device(). This is 245 * because normally we may only know device's device number and 246 * function number when writing device tree. The bus number is 247 * dynamically assigned during the pci enumeration process. 248 */ 249 if ((dt_vendor != vendor) || (dt_device != device)) { 250 *bdf = pci_find_device(dt_vendor, dt_device, 0); 251 if (*bdf == -1) 252 return -ENODEV; 253 } 254 255 return 0; 256 } 257 258 int fdtdec_get_pci_bar32(const void *blob, int node, 259 struct fdt_pci_addr *addr, u32 *bar) 260 { 261 pci_dev_t bdf; 262 int barnum; 263 int ret; 264 265 /* get pci devices's bdf */ 266 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf); 267 if (ret) 268 return ret; 269 270 /* extract the bar number from fdt_pci_addr */ 271 barnum = addr->phys_hi & 0xff; 272 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) 273 return -EINVAL; 274 275 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; 276 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum); 277 278 return 0; 279 } 280 #endif 281 282 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 283 uint64_t default_val) 284 { 285 const uint64_t *cell64; 286 int length; 287 288 cell64 = fdt_getprop(blob, node, prop_name, &length); 289 if (!cell64 || length < sizeof(*cell64)) 290 return default_val; 291 292 return fdt64_to_cpu(*cell64); 293 } 294 295 int fdtdec_get_is_enabled(const void *blob, int node) 296 { 297 const char *cell; 298 299 /* 300 * It should say "okay", so only allow that. Some fdts use "ok" but 301 * this is a bug. Please fix your device tree source file. See here 302 * for discussion: 303 * 304 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 305 */ 306 cell = fdt_getprop(blob, node, "status", NULL); 307 if (cell) 308 return 0 == strcmp(cell, "okay"); 309 return 1; 310 } 311 312 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 313 { 314 enum fdt_compat_id id; 315 316 /* Search our drivers */ 317 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 318 if (0 == fdt_node_check_compatible(blob, node, 319 compat_names[id])) 320 return id; 321 return COMPAT_UNKNOWN; 322 } 323 324 int fdtdec_next_compatible(const void *blob, int node, 325 enum fdt_compat_id id) 326 { 327 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 328 } 329 330 int fdtdec_next_compatible_subnode(const void *blob, int node, 331 enum fdt_compat_id id, int *depthp) 332 { 333 do { 334 node = fdt_next_node(blob, node, depthp); 335 } while (*depthp > 1); 336 337 /* If this is a direct subnode, and compatible, return it */ 338 if (*depthp == 1 && 0 == fdt_node_check_compatible( 339 blob, node, compat_names[id])) 340 return node; 341 342 return -FDT_ERR_NOTFOUND; 343 } 344 345 int fdtdec_next_alias(const void *blob, const char *name, 346 enum fdt_compat_id id, int *upto) 347 { 348 #define MAX_STR_LEN 20 349 char str[MAX_STR_LEN + 20]; 350 int node, err; 351 352 /* snprintf() is not available */ 353 assert(strlen(name) < MAX_STR_LEN); 354 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 355 node = fdt_path_offset(blob, str); 356 if (node < 0) 357 return node; 358 err = fdt_node_check_compatible(blob, node, compat_names[id]); 359 if (err < 0) 360 return err; 361 if (err) 362 return -FDT_ERR_NOTFOUND; 363 (*upto)++; 364 return node; 365 } 366 367 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 368 enum fdt_compat_id id, int *node_list, int maxcount) 369 { 370 memset(node_list, '\0', sizeof(*node_list) * maxcount); 371 372 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 373 } 374 375 /* TODO: Can we tighten this code up a little? */ 376 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 377 enum fdt_compat_id id, int *node_list, int maxcount) 378 { 379 int name_len = strlen(name); 380 int nodes[maxcount]; 381 int num_found = 0; 382 int offset, node; 383 int alias_node; 384 int count; 385 int i, j; 386 387 /* find the alias node if present */ 388 alias_node = fdt_path_offset(blob, "/aliases"); 389 390 /* 391 * start with nothing, and we can assume that the root node can't 392 * match 393 */ 394 memset(nodes, '\0', sizeof(nodes)); 395 396 /* First find all the compatible nodes */ 397 for (node = count = 0; node >= 0 && count < maxcount;) { 398 node = fdtdec_next_compatible(blob, node, id); 399 if (node >= 0) 400 nodes[count++] = node; 401 } 402 if (node >= 0) 403 debug("%s: warning: maxcount exceeded with alias '%s'\n", 404 __func__, name); 405 406 /* Now find all the aliases */ 407 for (offset = fdt_first_property_offset(blob, alias_node); 408 offset > 0; 409 offset = fdt_next_property_offset(blob, offset)) { 410 const struct fdt_property *prop; 411 const char *path; 412 int number; 413 int found; 414 415 node = 0; 416 prop = fdt_get_property_by_offset(blob, offset, NULL); 417 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 418 if (prop->len && 0 == strncmp(path, name, name_len)) 419 node = fdt_path_offset(blob, prop->data); 420 if (node <= 0) 421 continue; 422 423 /* Get the alias number */ 424 number = simple_strtoul(path + name_len, NULL, 10); 425 if (number < 0 || number >= maxcount) { 426 debug("%s: warning: alias '%s' is out of range\n", 427 __func__, path); 428 continue; 429 } 430 431 /* Make sure the node we found is actually in our list! */ 432 found = -1; 433 for (j = 0; j < count; j++) 434 if (nodes[j] == node) { 435 found = j; 436 break; 437 } 438 439 if (found == -1) { 440 debug("%s: warning: alias '%s' points to a node " 441 "'%s' that is missing or is not compatible " 442 " with '%s'\n", __func__, path, 443 fdt_get_name(blob, node, NULL), 444 compat_names[id]); 445 continue; 446 } 447 448 /* 449 * Add this node to our list in the right place, and mark 450 * it as done. 451 */ 452 if (fdtdec_get_is_enabled(blob, node)) { 453 if (node_list[number]) { 454 debug("%s: warning: alias '%s' requires that " 455 "a node be placed in the list in a " 456 "position which is already filled by " 457 "node '%s'\n", __func__, path, 458 fdt_get_name(blob, node, NULL)); 459 continue; 460 } 461 node_list[number] = node; 462 if (number >= num_found) 463 num_found = number + 1; 464 } 465 nodes[found] = 0; 466 } 467 468 /* Add any nodes not mentioned by an alias */ 469 for (i = j = 0; i < maxcount; i++) { 470 if (!node_list[i]) { 471 for (; j < maxcount; j++) 472 if (nodes[j] && 473 fdtdec_get_is_enabled(blob, nodes[j])) 474 break; 475 476 /* Have we run out of nodes to add? */ 477 if (j == maxcount) 478 break; 479 480 assert(!node_list[i]); 481 node_list[i] = nodes[j++]; 482 if (i >= num_found) 483 num_found = i + 1; 484 } 485 } 486 487 return num_found; 488 } 489 490 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 491 int *seqp) 492 { 493 int base_len = strlen(base); 494 const char *find_name; 495 int find_namelen; 496 int prop_offset; 497 int aliases; 498 499 find_name = fdt_get_name(blob, offset, &find_namelen); 500 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 501 502 aliases = fdt_path_offset(blob, "/aliases"); 503 for (prop_offset = fdt_first_property_offset(blob, aliases); 504 prop_offset > 0; 505 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 506 const char *prop; 507 const char *name; 508 const char *slash; 509 const char *p; 510 int len; 511 512 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 513 debug(" - %s, %s\n", name, prop); 514 if (len < find_namelen || *prop != '/' || prop[len - 1] || 515 strncmp(name, base, base_len)) 516 continue; 517 518 slash = strrchr(prop, '/'); 519 if (strcmp(slash + 1, find_name)) 520 continue; 521 for (p = name + strlen(name) - 1; p > name; p--) { 522 if (!isdigit(*p)) { 523 *seqp = simple_strtoul(p + 1, NULL, 10); 524 debug("Found seq %d\n", *seqp); 525 return 0; 526 } 527 } 528 } 529 530 debug("Not found\n"); 531 return -ENOENT; 532 } 533 534 int fdtdec_get_chosen_node(const void *blob, const char *name) 535 { 536 const char *prop; 537 int chosen_node; 538 int len; 539 540 if (!blob) 541 return -FDT_ERR_NOTFOUND; 542 chosen_node = fdt_path_offset(blob, "/chosen"); 543 prop = fdt_getprop(blob, chosen_node, name, &len); 544 if (!prop) 545 return -FDT_ERR_NOTFOUND; 546 return fdt_path_offset(blob, prop); 547 } 548 549 int fdtdec_check_fdt(void) 550 { 551 /* 552 * We must have an FDT, but we cannot panic() yet since the console 553 * is not ready. So for now, just assert(). Boards which need an early 554 * FDT (prior to console ready) will need to make their own 555 * arrangements and do their own checks. 556 */ 557 assert(!fdtdec_prepare_fdt()); 558 return 0; 559 } 560 561 /* 562 * This function is a little odd in that it accesses global data. At some 563 * point if the architecture board.c files merge this will make more sense. 564 * Even now, it is common code. 565 */ 566 int fdtdec_prepare_fdt(void) 567 { 568 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 569 fdt_check_header(gd->fdt_blob)) { 570 #ifdef CONFIG_SPL_BUILD 571 puts("Missing DTB\n"); 572 #else 573 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"); 574 #endif 575 return -1; 576 } 577 return 0; 578 } 579 580 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 581 { 582 const u32 *phandle; 583 int lookup; 584 585 debug("%s: %s\n", __func__, prop_name); 586 phandle = fdt_getprop(blob, node, prop_name, NULL); 587 if (!phandle) 588 return -FDT_ERR_NOTFOUND; 589 590 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 591 return lookup; 592 } 593 594 /** 595 * Look up a property in a node and check that it has a minimum length. 596 * 597 * @param blob FDT blob 598 * @param node node to examine 599 * @param prop_name name of property to find 600 * @param min_len minimum property length in bytes 601 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 602 found, or -FDT_ERR_BADLAYOUT if not enough data 603 * @return pointer to cell, which is only valid if err == 0 604 */ 605 static const void *get_prop_check_min_len(const void *blob, int node, 606 const char *prop_name, int min_len, int *err) 607 { 608 const void *cell; 609 int len; 610 611 debug("%s: %s\n", __func__, prop_name); 612 cell = fdt_getprop(blob, node, prop_name, &len); 613 if (!cell) 614 *err = -FDT_ERR_NOTFOUND; 615 else if (len < min_len) 616 *err = -FDT_ERR_BADLAYOUT; 617 else 618 *err = 0; 619 return cell; 620 } 621 622 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 623 u32 *array, int count) 624 { 625 const u32 *cell; 626 int i, err = 0; 627 628 debug("%s: %s\n", __func__, prop_name); 629 cell = get_prop_check_min_len(blob, node, prop_name, 630 sizeof(u32) * count, &err); 631 if (!err) { 632 for (i = 0; i < count; i++) 633 array[i] = fdt32_to_cpu(cell[i]); 634 } 635 return err; 636 } 637 638 int fdtdec_get_int_array_count(const void *blob, int node, 639 const char *prop_name, u32 *array, int count) 640 { 641 const u32 *cell; 642 int len, elems; 643 int i; 644 645 debug("%s: %s\n", __func__, prop_name); 646 cell = fdt_getprop(blob, node, prop_name, &len); 647 if (!cell) 648 return -FDT_ERR_NOTFOUND; 649 elems = len / sizeof(u32); 650 if (count > elems) 651 count = elems; 652 for (i = 0; i < count; i++) 653 array[i] = fdt32_to_cpu(cell[i]); 654 655 return count; 656 } 657 658 const u32 *fdtdec_locate_array(const void *blob, int node, 659 const char *prop_name, int count) 660 { 661 const u32 *cell; 662 int err; 663 664 cell = get_prop_check_min_len(blob, node, prop_name, 665 sizeof(u32) * count, &err); 666 return err ? NULL : cell; 667 } 668 669 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 670 { 671 const s32 *cell; 672 int len; 673 674 debug("%s: %s\n", __func__, prop_name); 675 cell = fdt_getprop(blob, node, prop_name, &len); 676 return cell != NULL; 677 } 678 679 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 680 const char *list_name, 681 const char *cells_name, 682 int cell_count, int index, 683 struct fdtdec_phandle_args *out_args) 684 { 685 const __be32 *list, *list_end; 686 int rc = 0, size, cur_index = 0; 687 uint32_t count = 0; 688 int node = -1; 689 int phandle; 690 691 /* Retrieve the phandle list property */ 692 list = fdt_getprop(blob, src_node, list_name, &size); 693 if (!list) 694 return -ENOENT; 695 list_end = list + size / sizeof(*list); 696 697 /* Loop over the phandles until all the requested entry is found */ 698 while (list < list_end) { 699 rc = -EINVAL; 700 count = 0; 701 702 /* 703 * If phandle is 0, then it is an empty entry with no 704 * arguments. Skip forward to the next entry. 705 */ 706 phandle = be32_to_cpup(list++); 707 if (phandle) { 708 /* 709 * Find the provider node and parse the #*-cells 710 * property to determine the argument length. 711 * 712 * This is not needed if the cell count is hard-coded 713 * (i.e. cells_name not set, but cell_count is set), 714 * except when we're going to return the found node 715 * below. 716 */ 717 if (cells_name || cur_index == index) { 718 node = fdt_node_offset_by_phandle(blob, 719 phandle); 720 if (!node) { 721 debug("%s: could not find phandle\n", 722 fdt_get_name(blob, src_node, 723 NULL)); 724 goto err; 725 } 726 } 727 728 if (cells_name) { 729 count = fdtdec_get_int(blob, node, cells_name, 730 -1); 731 if (count == -1) { 732 debug("%s: could not get %s for %s\n", 733 fdt_get_name(blob, src_node, 734 NULL), 735 cells_name, 736 fdt_get_name(blob, node, 737 NULL)); 738 goto err; 739 } 740 } else { 741 count = cell_count; 742 } 743 744 /* 745 * Make sure that the arguments actually fit in the 746 * remaining property data length 747 */ 748 if (list + count > list_end) { 749 debug("%s: arguments longer than property\n", 750 fdt_get_name(blob, src_node, NULL)); 751 goto err; 752 } 753 } 754 755 /* 756 * All of the error cases above bail out of the loop, so at 757 * this point, the parsing is successful. If the requested 758 * index matches, then fill the out_args structure and return, 759 * or return -ENOENT for an empty entry. 760 */ 761 rc = -ENOENT; 762 if (cur_index == index) { 763 if (!phandle) 764 goto err; 765 766 if (out_args) { 767 int i; 768 769 if (count > MAX_PHANDLE_ARGS) { 770 debug("%s: too many arguments %d\n", 771 fdt_get_name(blob, src_node, 772 NULL), count); 773 count = MAX_PHANDLE_ARGS; 774 } 775 out_args->node = node; 776 out_args->args_count = count; 777 for (i = 0; i < count; i++) { 778 out_args->args[i] = 779 be32_to_cpup(list++); 780 } 781 } 782 783 /* Found it! return success */ 784 return 0; 785 } 786 787 node = -1; 788 list += count; 789 cur_index++; 790 } 791 792 /* 793 * Result will be one of: 794 * -ENOENT : index is for empty phandle 795 * -EINVAL : parsing error on data 796 * [1..n] : Number of phandle (count mode; when index = -1) 797 */ 798 rc = index < 0 ? cur_index : -ENOENT; 799 err: 800 return rc; 801 } 802 803 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 804 u8 *array, int count) 805 { 806 const u8 *cell; 807 int err; 808 809 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 810 if (!err) 811 memcpy(array, cell, count); 812 return err; 813 } 814 815 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 816 const char *prop_name, int count) 817 { 818 const u8 *cell; 819 int err; 820 821 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 822 if (err) 823 return NULL; 824 return cell; 825 } 826 827 int fdtdec_get_config_int(const void *blob, const char *prop_name, 828 int default_val) 829 { 830 int config_node; 831 832 debug("%s: %s\n", __func__, prop_name); 833 config_node = fdt_path_offset(blob, "/config"); 834 if (config_node < 0) 835 return default_val; 836 return fdtdec_get_int(blob, config_node, prop_name, default_val); 837 } 838 839 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 840 { 841 int config_node; 842 const void *prop; 843 844 debug("%s: %s\n", __func__, prop_name); 845 config_node = fdt_path_offset(blob, "/config"); 846 if (config_node < 0) 847 return 0; 848 prop = fdt_get_property(blob, config_node, prop_name, NULL); 849 850 return prop != NULL; 851 } 852 853 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 854 { 855 const char *nodep; 856 int nodeoffset; 857 int len; 858 859 debug("%s: %s\n", __func__, prop_name); 860 nodeoffset = fdt_path_offset(blob, "/config"); 861 if (nodeoffset < 0) 862 return NULL; 863 864 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 865 if (!nodep) 866 return NULL; 867 868 return (char *)nodep; 869 } 870 871 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 872 fdt_addr_t *basep, fdt_size_t *sizep) 873 { 874 const fdt_addr_t *cell; 875 int len; 876 877 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 878 prop_name); 879 cell = fdt_getprop(blob, node, prop_name, &len); 880 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 881 debug("cell=%p, len=%d\n", cell, len); 882 return -1; 883 } 884 885 *basep = fdt_addr_to_cpu(*cell); 886 *sizep = fdt_size_to_cpu(cell[1]); 887 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 888 (ulong)*sizep); 889 890 return 0; 891 } 892 893 /** 894 * Read a flash entry from the fdt 895 * 896 * @param blob FDT blob 897 * @param node Offset of node to read 898 * @param name Name of node being read 899 * @param entry Place to put offset and size of this node 900 * @return 0 if ok, -ve on error 901 */ 902 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 903 struct fmap_entry *entry) 904 { 905 const char *prop; 906 u32 reg[2]; 907 908 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 909 debug("Node '%s' has bad/missing 'reg' property\n", name); 910 return -FDT_ERR_NOTFOUND; 911 } 912 entry->offset = reg[0]; 913 entry->length = reg[1]; 914 entry->used = fdtdec_get_int(blob, node, "used", entry->length); 915 prop = fdt_getprop(blob, node, "compress", NULL); 916 entry->compress_algo = prop && !strcmp(prop, "lzo") ? 917 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; 918 prop = fdt_getprop(blob, node, "hash", &entry->hash_size); 919 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; 920 entry->hash = (uint8_t *)prop; 921 922 return 0; 923 } 924 925 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 926 { 927 u64 number = 0; 928 929 while (cells--) 930 number = (number << 32) | fdt32_to_cpu(*ptr++); 931 932 return number; 933 } 934 935 int fdt_get_resource(const void *fdt, int node, const char *property, 936 unsigned int index, struct fdt_resource *res) 937 { 938 const fdt32_t *ptr, *end; 939 int na, ns, len, parent; 940 unsigned int i = 0; 941 942 parent = fdt_parent_offset(fdt, node); 943 if (parent < 0) 944 return parent; 945 946 na = fdt_address_cells(fdt, parent); 947 ns = fdt_size_cells(fdt, parent); 948 949 ptr = fdt_getprop(fdt, node, property, &len); 950 if (!ptr) 951 return len; 952 953 end = ptr + len / sizeof(*ptr); 954 955 while (ptr + na + ns <= end) { 956 if (i == index) { 957 res->start = res->end = fdtdec_get_number(ptr, na); 958 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 959 return 0; 960 } 961 962 ptr += na + ns; 963 i++; 964 } 965 966 return -FDT_ERR_NOTFOUND; 967 } 968 969 int fdt_get_named_resource(const void *fdt, int node, const char *property, 970 const char *prop_names, const char *name, 971 struct fdt_resource *res) 972 { 973 int index; 974 975 index = fdt_find_string(fdt, node, prop_names, name); 976 if (index < 0) 977 return index; 978 979 return fdt_get_resource(fdt, node, property, index, res); 980 } 981 982 int fdtdec_decode_memory_region(const void *blob, int config_node, 983 const char *mem_type, const char *suffix, 984 fdt_addr_t *basep, fdt_size_t *sizep) 985 { 986 char prop_name[50]; 987 const char *mem; 988 fdt_size_t size, offset_size; 989 fdt_addr_t base, offset; 990 int node; 991 992 if (config_node == -1) { 993 config_node = fdt_path_offset(blob, "/config"); 994 if (config_node < 0) { 995 debug("%s: Cannot find /config node\n", __func__); 996 return -ENOENT; 997 } 998 } 999 if (!suffix) 1000 suffix = ""; 1001 1002 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 1003 suffix); 1004 mem = fdt_getprop(blob, config_node, prop_name, NULL); 1005 if (!mem) { 1006 debug("%s: No memory type for '%s', using /memory\n", __func__, 1007 prop_name); 1008 mem = "/memory"; 1009 } 1010 1011 node = fdt_path_offset(blob, mem); 1012 if (node < 0) { 1013 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 1014 fdt_strerror(node)); 1015 return -ENOENT; 1016 } 1017 1018 /* 1019 * Not strictly correct - the memory may have multiple banks. We just 1020 * use the first 1021 */ 1022 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 1023 debug("%s: Failed to decode memory region %s\n", __func__, 1024 mem); 1025 return -EINVAL; 1026 } 1027 1028 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 1029 suffix); 1030 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 1031 &offset_size)) { 1032 debug("%s: Failed to decode memory region '%s'\n", __func__, 1033 prop_name); 1034 return -EINVAL; 1035 } 1036 1037 *basep = base + offset; 1038 *sizep = offset_size; 1039 1040 return 0; 1041 } 1042 1043 static int decode_timing_property(const void *blob, int node, const char *name, 1044 struct timing_entry *result) 1045 { 1046 int length, ret = 0; 1047 const u32 *prop; 1048 1049 prop = fdt_getprop(blob, node, name, &length); 1050 if (!prop) { 1051 debug("%s: could not find property %s\n", 1052 fdt_get_name(blob, node, NULL), name); 1053 return length; 1054 } 1055 1056 if (length == sizeof(u32)) { 1057 result->typ = fdtdec_get_int(blob, node, name, 0); 1058 result->min = result->typ; 1059 result->max = result->typ; 1060 } else { 1061 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3); 1062 } 1063 1064 return ret; 1065 } 1066 1067 int fdtdec_decode_display_timing(const void *blob, int parent, int index, 1068 struct display_timing *dt) 1069 { 1070 int i, node, timings_node; 1071 u32 val = 0; 1072 int ret = 0; 1073 1074 timings_node = fdt_subnode_offset(blob, parent, "display-timings"); 1075 if (timings_node < 0) 1076 return timings_node; 1077 1078 for (i = 0, node = fdt_first_subnode(blob, timings_node); 1079 node > 0 && i != index; 1080 node = fdt_next_subnode(blob, node)) 1081 i++; 1082 1083 if (node < 0) 1084 return node; 1085 1086 memset(dt, 0, sizeof(*dt)); 1087 1088 ret |= decode_timing_property(blob, node, "hback-porch", 1089 &dt->hback_porch); 1090 ret |= decode_timing_property(blob, node, "hfront-porch", 1091 &dt->hfront_porch); 1092 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive); 1093 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len); 1094 ret |= decode_timing_property(blob, node, "vback-porch", 1095 &dt->vback_porch); 1096 ret |= decode_timing_property(blob, node, "vfront-porch", 1097 &dt->vfront_porch); 1098 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive); 1099 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len); 1100 ret |= decode_timing_property(blob, node, "clock-frequency", 1101 &dt->pixelclock); 1102 1103 dt->flags = 0; 1104 val = fdtdec_get_int(blob, node, "vsync-active", -1); 1105 if (val != -1) { 1106 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : 1107 DISPLAY_FLAGS_VSYNC_LOW; 1108 } 1109 val = fdtdec_get_int(blob, node, "hsync-active", -1); 1110 if (val != -1) { 1111 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : 1112 DISPLAY_FLAGS_HSYNC_LOW; 1113 } 1114 val = fdtdec_get_int(blob, node, "de-active", -1); 1115 if (val != -1) { 1116 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : 1117 DISPLAY_FLAGS_DE_LOW; 1118 } 1119 val = fdtdec_get_int(blob, node, "pixelclk-active", -1); 1120 if (val != -1) { 1121 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : 1122 DISPLAY_FLAGS_PIXDATA_NEGEDGE; 1123 } 1124 1125 if (fdtdec_get_bool(blob, node, "interlaced")) 1126 dt->flags |= DISPLAY_FLAGS_INTERLACED; 1127 if (fdtdec_get_bool(blob, node, "doublescan")) 1128 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; 1129 if (fdtdec_get_bool(blob, node, "doubleclk")) 1130 dt->flags |= DISPLAY_FLAGS_DOUBLECLK; 1131 1132 return 0; 1133 } 1134 1135 int fdtdec_setup(void) 1136 { 1137 #ifdef CONFIG_OF_CONTROL 1138 # ifdef CONFIG_OF_EMBED 1139 /* Get a pointer to the FDT */ 1140 gd->fdt_blob = __dtb_dt_begin; 1141 # elif defined CONFIG_OF_SEPARATE 1142 # ifdef CONFIG_SPL_BUILD 1143 /* FDT is at end of BSS */ 1144 gd->fdt_blob = (ulong *)&__bss_end; 1145 # else 1146 /* FDT is at end of image */ 1147 gd->fdt_blob = (ulong *)&_end; 1148 #endif 1149 # elif defined(CONFIG_OF_HOSTFILE) 1150 if (sandbox_read_fdt_from_file()) { 1151 puts("Failed to read control FDT\n"); 1152 return -1; 1153 } 1154 # endif 1155 # ifndef CONFIG_SPL_BUILD 1156 /* Allow the early environment to override the fdt address */ 1157 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, 1158 (uintptr_t)gd->fdt_blob); 1159 # endif 1160 #endif 1161 return fdtdec_prepare_fdt(); 1162 } 1163 1164 #endif /* !USE_HOSTCC */ 1165