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(INTEL_X86_PINCTRL, "intel,x86-pinctrl"), 79 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"), 80 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"), 81 COMPAT(COMPAT_INTEL_IRQ_ROUTER, "intel,irq-router"), 82 }; 83 84 const char *fdtdec_get_compatible(enum fdt_compat_id id) 85 { 86 /* We allow reading of the 'unknown' ID for testing purposes */ 87 assert(id >= 0 && id < COMPAT_COUNT); 88 return compat_names[id]; 89 } 90 91 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 92 const char *prop_name, fdt_size_t *sizep) 93 { 94 const fdt_addr_t *cell; 95 int len; 96 97 debug("%s: %s: ", __func__, prop_name); 98 cell = fdt_getprop(blob, node, prop_name, &len); 99 if (cell && ((!sizep && len == sizeof(fdt_addr_t)) || 100 len == sizeof(fdt_addr_t) * 2)) { 101 fdt_addr_t addr = fdt_addr_to_cpu(*cell); 102 if (sizep) { 103 const fdt_size_t *size; 104 105 size = (fdt_size_t *)((char *)cell + 106 sizeof(fdt_addr_t)); 107 *sizep = fdt_size_to_cpu(*size); 108 debug("addr=%08lx, size=%08x\n", 109 (ulong)addr, *sizep); 110 } else { 111 debug("%08lx\n", (ulong)addr); 112 } 113 return addr; 114 } 115 debug("(not found)\n"); 116 return FDT_ADDR_T_NONE; 117 } 118 119 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 120 const char *prop_name) 121 { 122 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 123 } 124 125 #ifdef CONFIG_PCI 126 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 127 const char *prop_name, struct fdt_pci_addr *addr) 128 { 129 const u32 *cell; 130 int len; 131 int ret = -ENOENT; 132 133 debug("%s: %s: ", __func__, prop_name); 134 135 /* 136 * If we follow the pci bus bindings strictly, we should check 137 * the value of the node's parent node's #address-cells and 138 * #size-cells. They need to be 3 and 2 accordingly. However, 139 * for simplicity we skip the check here. 140 */ 141 cell = fdt_getprop(blob, node, prop_name, &len); 142 if (!cell) 143 goto fail; 144 145 if ((len % FDT_PCI_REG_SIZE) == 0) { 146 int num = len / FDT_PCI_REG_SIZE; 147 int i; 148 149 for (i = 0; i < num; i++) { 150 debug("pci address #%d: %08lx %08lx %08lx\n", i, 151 (ulong)fdt_addr_to_cpu(cell[0]), 152 (ulong)fdt_addr_to_cpu(cell[1]), 153 (ulong)fdt_addr_to_cpu(cell[2])); 154 if ((fdt_addr_to_cpu(*cell) & type) == type) { 155 addr->phys_hi = fdt_addr_to_cpu(cell[0]); 156 addr->phys_mid = fdt_addr_to_cpu(cell[1]); 157 addr->phys_lo = fdt_addr_to_cpu(cell[2]); 158 break; 159 } else { 160 cell += (FDT_PCI_ADDR_CELLS + 161 FDT_PCI_SIZE_CELLS); 162 } 163 } 164 165 if (i == num) { 166 ret = -ENXIO; 167 goto fail; 168 } 169 170 return 0; 171 } else { 172 ret = -EINVAL; 173 } 174 175 fail: 176 debug("(not found)\n"); 177 return ret; 178 } 179 180 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 181 { 182 const char *list, *end; 183 int len; 184 185 list = fdt_getprop(blob, node, "compatible", &len); 186 if (!list) 187 return -ENOENT; 188 189 end = list + len; 190 while (list < end) { 191 char *s; 192 193 len = strlen(list); 194 if (len >= strlen("pciVVVV,DDDD")) { 195 s = strstr(list, "pci"); 196 197 /* 198 * check if the string is something like pciVVVV,DDDD.RR 199 * or just pciVVVV,DDDD 200 */ 201 if (s && s[7] == ',' && 202 (s[12] == '.' || s[12] == 0)) { 203 s += 3; 204 *vendor = simple_strtol(s, NULL, 16); 205 206 s += 5; 207 *device = simple_strtol(s, NULL, 16); 208 209 return 0; 210 } 211 } else { 212 list += (len + 1); 213 } 214 } 215 216 return -ENOENT; 217 } 218 219 int fdtdec_get_pci_bdf(const void *blob, int node, 220 struct fdt_pci_addr *addr, pci_dev_t *bdf) 221 { 222 u16 dt_vendor, dt_device, vendor, device; 223 int ret; 224 225 /* get vendor id & device id from the compatible string */ 226 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device); 227 if (ret) 228 return ret; 229 230 /* extract the bdf from fdt_pci_addr */ 231 *bdf = addr->phys_hi & 0xffff00; 232 233 /* read vendor id & device id based on bdf */ 234 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor); 235 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device); 236 237 /* 238 * Note there are two places in the device tree to fully describe 239 * a pci device: one is via compatible string with a format of 240 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in 241 * the device node's reg address property. We read the vendor id 242 * and device id based on bdf and compare the values with the 243 * "VVVV,DDDD". If they are the same, then we are good to use bdf 244 * to read device's bar. But if they are different, we have to rely 245 * on the vendor id and device id extracted from the compatible 246 * string and locate the real bdf by pci_find_device(). This is 247 * because normally we may only know device's device number and 248 * function number when writing device tree. The bus number is 249 * dynamically assigned during the pci enumeration process. 250 */ 251 if ((dt_vendor != vendor) || (dt_device != device)) { 252 *bdf = pci_find_device(dt_vendor, dt_device, 0); 253 if (*bdf == -1) 254 return -ENODEV; 255 } 256 257 return 0; 258 } 259 260 int fdtdec_get_pci_bar32(const void *blob, int node, 261 struct fdt_pci_addr *addr, u32 *bar) 262 { 263 pci_dev_t bdf; 264 int barnum; 265 int ret; 266 267 /* get pci devices's bdf */ 268 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf); 269 if (ret) 270 return ret; 271 272 /* extract the bar number from fdt_pci_addr */ 273 barnum = addr->phys_hi & 0xff; 274 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) 275 return -EINVAL; 276 277 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; 278 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum); 279 280 return 0; 281 } 282 #endif 283 284 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 285 uint64_t default_val) 286 { 287 const uint64_t *cell64; 288 int length; 289 290 cell64 = fdt_getprop(blob, node, prop_name, &length); 291 if (!cell64 || length < sizeof(*cell64)) 292 return default_val; 293 294 return fdt64_to_cpu(*cell64); 295 } 296 297 int fdtdec_get_is_enabled(const void *blob, int node) 298 { 299 const char *cell; 300 301 /* 302 * It should say "okay", so only allow that. Some fdts use "ok" but 303 * this is a bug. Please fix your device tree source file. See here 304 * for discussion: 305 * 306 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 307 */ 308 cell = fdt_getprop(blob, node, "status", NULL); 309 if (cell) 310 return 0 == strcmp(cell, "okay"); 311 return 1; 312 } 313 314 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 315 { 316 enum fdt_compat_id id; 317 318 /* Search our drivers */ 319 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 320 if (0 == fdt_node_check_compatible(blob, node, 321 compat_names[id])) 322 return id; 323 return COMPAT_UNKNOWN; 324 } 325 326 int fdtdec_next_compatible(const void *blob, int node, 327 enum fdt_compat_id id) 328 { 329 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 330 } 331 332 int fdtdec_next_compatible_subnode(const void *blob, int node, 333 enum fdt_compat_id id, int *depthp) 334 { 335 do { 336 node = fdt_next_node(blob, node, depthp); 337 } while (*depthp > 1); 338 339 /* If this is a direct subnode, and compatible, return it */ 340 if (*depthp == 1 && 0 == fdt_node_check_compatible( 341 blob, node, compat_names[id])) 342 return node; 343 344 return -FDT_ERR_NOTFOUND; 345 } 346 347 int fdtdec_next_alias(const void *blob, const char *name, 348 enum fdt_compat_id id, int *upto) 349 { 350 #define MAX_STR_LEN 20 351 char str[MAX_STR_LEN + 20]; 352 int node, err; 353 354 /* snprintf() is not available */ 355 assert(strlen(name) < MAX_STR_LEN); 356 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 357 node = fdt_path_offset(blob, str); 358 if (node < 0) 359 return node; 360 err = fdt_node_check_compatible(blob, node, compat_names[id]); 361 if (err < 0) 362 return err; 363 if (err) 364 return -FDT_ERR_NOTFOUND; 365 (*upto)++; 366 return node; 367 } 368 369 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 370 enum fdt_compat_id id, int *node_list, int maxcount) 371 { 372 memset(node_list, '\0', sizeof(*node_list) * maxcount); 373 374 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 375 } 376 377 /* TODO: Can we tighten this code up a little? */ 378 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 379 enum fdt_compat_id id, int *node_list, int maxcount) 380 { 381 int name_len = strlen(name); 382 int nodes[maxcount]; 383 int num_found = 0; 384 int offset, node; 385 int alias_node; 386 int count; 387 int i, j; 388 389 /* find the alias node if present */ 390 alias_node = fdt_path_offset(blob, "/aliases"); 391 392 /* 393 * start with nothing, and we can assume that the root node can't 394 * match 395 */ 396 memset(nodes, '\0', sizeof(nodes)); 397 398 /* First find all the compatible nodes */ 399 for (node = count = 0; node >= 0 && count < maxcount;) { 400 node = fdtdec_next_compatible(blob, node, id); 401 if (node >= 0) 402 nodes[count++] = node; 403 } 404 if (node >= 0) 405 debug("%s: warning: maxcount exceeded with alias '%s'\n", 406 __func__, name); 407 408 /* Now find all the aliases */ 409 for (offset = fdt_first_property_offset(blob, alias_node); 410 offset > 0; 411 offset = fdt_next_property_offset(blob, offset)) { 412 const struct fdt_property *prop; 413 const char *path; 414 int number; 415 int found; 416 417 node = 0; 418 prop = fdt_get_property_by_offset(blob, offset, NULL); 419 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 420 if (prop->len && 0 == strncmp(path, name, name_len)) 421 node = fdt_path_offset(blob, prop->data); 422 if (node <= 0) 423 continue; 424 425 /* Get the alias number */ 426 number = simple_strtoul(path + name_len, NULL, 10); 427 if (number < 0 || number >= maxcount) { 428 debug("%s: warning: alias '%s' is out of range\n", 429 __func__, path); 430 continue; 431 } 432 433 /* Make sure the node we found is actually in our list! */ 434 found = -1; 435 for (j = 0; j < count; j++) 436 if (nodes[j] == node) { 437 found = j; 438 break; 439 } 440 441 if (found == -1) { 442 debug("%s: warning: alias '%s' points to a node " 443 "'%s' that is missing or is not compatible " 444 " with '%s'\n", __func__, path, 445 fdt_get_name(blob, node, NULL), 446 compat_names[id]); 447 continue; 448 } 449 450 /* 451 * Add this node to our list in the right place, and mark 452 * it as done. 453 */ 454 if (fdtdec_get_is_enabled(blob, node)) { 455 if (node_list[number]) { 456 debug("%s: warning: alias '%s' requires that " 457 "a node be placed in the list in a " 458 "position which is already filled by " 459 "node '%s'\n", __func__, path, 460 fdt_get_name(blob, node, NULL)); 461 continue; 462 } 463 node_list[number] = node; 464 if (number >= num_found) 465 num_found = number + 1; 466 } 467 nodes[found] = 0; 468 } 469 470 /* Add any nodes not mentioned by an alias */ 471 for (i = j = 0; i < maxcount; i++) { 472 if (!node_list[i]) { 473 for (; j < maxcount; j++) 474 if (nodes[j] && 475 fdtdec_get_is_enabled(blob, nodes[j])) 476 break; 477 478 /* Have we run out of nodes to add? */ 479 if (j == maxcount) 480 break; 481 482 assert(!node_list[i]); 483 node_list[i] = nodes[j++]; 484 if (i >= num_found) 485 num_found = i + 1; 486 } 487 } 488 489 return num_found; 490 } 491 492 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 493 int *seqp) 494 { 495 int base_len = strlen(base); 496 const char *find_name; 497 int find_namelen; 498 int prop_offset; 499 int aliases; 500 501 find_name = fdt_get_name(blob, offset, &find_namelen); 502 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 503 504 aliases = fdt_path_offset(blob, "/aliases"); 505 for (prop_offset = fdt_first_property_offset(blob, aliases); 506 prop_offset > 0; 507 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 508 const char *prop; 509 const char *name; 510 const char *slash; 511 const char *p; 512 int len; 513 514 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 515 debug(" - %s, %s\n", name, prop); 516 if (len < find_namelen || *prop != '/' || prop[len - 1] || 517 strncmp(name, base, base_len)) 518 continue; 519 520 slash = strrchr(prop, '/'); 521 if (strcmp(slash + 1, find_name)) 522 continue; 523 for (p = name + strlen(name) - 1; p > name; p--) { 524 if (!isdigit(*p)) { 525 *seqp = simple_strtoul(p + 1, NULL, 10); 526 debug("Found seq %d\n", *seqp); 527 return 0; 528 } 529 } 530 } 531 532 debug("Not found\n"); 533 return -ENOENT; 534 } 535 536 int fdtdec_get_chosen_node(const void *blob, const char *name) 537 { 538 const char *prop; 539 int chosen_node; 540 int len; 541 542 if (!blob) 543 return -FDT_ERR_NOTFOUND; 544 chosen_node = fdt_path_offset(blob, "/chosen"); 545 prop = fdt_getprop(blob, chosen_node, name, &len); 546 if (!prop) 547 return -FDT_ERR_NOTFOUND; 548 return fdt_path_offset(blob, prop); 549 } 550 551 int fdtdec_check_fdt(void) 552 { 553 /* 554 * We must have an FDT, but we cannot panic() yet since the console 555 * is not ready. So for now, just assert(). Boards which need an early 556 * FDT (prior to console ready) will need to make their own 557 * arrangements and do their own checks. 558 */ 559 assert(!fdtdec_prepare_fdt()); 560 return 0; 561 } 562 563 /* 564 * This function is a little odd in that it accesses global data. At some 565 * point if the architecture board.c files merge this will make more sense. 566 * Even now, it is common code. 567 */ 568 int fdtdec_prepare_fdt(void) 569 { 570 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 571 fdt_check_header(gd->fdt_blob)) { 572 #ifdef CONFIG_SPL_BUILD 573 puts("Missing DTB\n"); 574 #else 575 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"); 576 #endif 577 return -1; 578 } 579 return 0; 580 } 581 582 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 583 { 584 const u32 *phandle; 585 int lookup; 586 587 debug("%s: %s\n", __func__, prop_name); 588 phandle = fdt_getprop(blob, node, prop_name, NULL); 589 if (!phandle) 590 return -FDT_ERR_NOTFOUND; 591 592 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 593 return lookup; 594 } 595 596 /** 597 * Look up a property in a node and check that it has a minimum length. 598 * 599 * @param blob FDT blob 600 * @param node node to examine 601 * @param prop_name name of property to find 602 * @param min_len minimum property length in bytes 603 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 604 found, or -FDT_ERR_BADLAYOUT if not enough data 605 * @return pointer to cell, which is only valid if err == 0 606 */ 607 static const void *get_prop_check_min_len(const void *blob, int node, 608 const char *prop_name, int min_len, int *err) 609 { 610 const void *cell; 611 int len; 612 613 debug("%s: %s\n", __func__, prop_name); 614 cell = fdt_getprop(blob, node, prop_name, &len); 615 if (!cell) 616 *err = -FDT_ERR_NOTFOUND; 617 else if (len < min_len) 618 *err = -FDT_ERR_BADLAYOUT; 619 else 620 *err = 0; 621 return cell; 622 } 623 624 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 625 u32 *array, int count) 626 { 627 const u32 *cell; 628 int i, err = 0; 629 630 debug("%s: %s\n", __func__, prop_name); 631 cell = get_prop_check_min_len(blob, node, prop_name, 632 sizeof(u32) * count, &err); 633 if (!err) { 634 for (i = 0; i < count; i++) 635 array[i] = fdt32_to_cpu(cell[i]); 636 } 637 return err; 638 } 639 640 int fdtdec_get_int_array_count(const void *blob, int node, 641 const char *prop_name, u32 *array, int count) 642 { 643 const u32 *cell; 644 int len, elems; 645 int i; 646 647 debug("%s: %s\n", __func__, prop_name); 648 cell = fdt_getprop(blob, node, prop_name, &len); 649 if (!cell) 650 return -FDT_ERR_NOTFOUND; 651 elems = len / sizeof(u32); 652 if (count > elems) 653 count = elems; 654 for (i = 0; i < count; i++) 655 array[i] = fdt32_to_cpu(cell[i]); 656 657 return count; 658 } 659 660 const u32 *fdtdec_locate_array(const void *blob, int node, 661 const char *prop_name, int count) 662 { 663 const u32 *cell; 664 int err; 665 666 cell = get_prop_check_min_len(blob, node, prop_name, 667 sizeof(u32) * count, &err); 668 return err ? NULL : cell; 669 } 670 671 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 672 { 673 const s32 *cell; 674 int len; 675 676 debug("%s: %s\n", __func__, prop_name); 677 cell = fdt_getprop(blob, node, prop_name, &len); 678 return cell != NULL; 679 } 680 681 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 682 const char *list_name, 683 const char *cells_name, 684 int cell_count, int index, 685 struct fdtdec_phandle_args *out_args) 686 { 687 const __be32 *list, *list_end; 688 int rc = 0, size, cur_index = 0; 689 uint32_t count = 0; 690 int node = -1; 691 int phandle; 692 693 /* Retrieve the phandle list property */ 694 list = fdt_getprop(blob, src_node, list_name, &size); 695 if (!list) 696 return -ENOENT; 697 list_end = list + size / sizeof(*list); 698 699 /* Loop over the phandles until all the requested entry is found */ 700 while (list < list_end) { 701 rc = -EINVAL; 702 count = 0; 703 704 /* 705 * If phandle is 0, then it is an empty entry with no 706 * arguments. Skip forward to the next entry. 707 */ 708 phandle = be32_to_cpup(list++); 709 if (phandle) { 710 /* 711 * Find the provider node and parse the #*-cells 712 * property to determine the argument length. 713 * 714 * This is not needed if the cell count is hard-coded 715 * (i.e. cells_name not set, but cell_count is set), 716 * except when we're going to return the found node 717 * below. 718 */ 719 if (cells_name || cur_index == index) { 720 node = fdt_node_offset_by_phandle(blob, 721 phandle); 722 if (!node) { 723 debug("%s: could not find phandle\n", 724 fdt_get_name(blob, src_node, 725 NULL)); 726 goto err; 727 } 728 } 729 730 if (cells_name) { 731 count = fdtdec_get_int(blob, node, cells_name, 732 -1); 733 if (count == -1) { 734 debug("%s: could not get %s for %s\n", 735 fdt_get_name(blob, src_node, 736 NULL), 737 cells_name, 738 fdt_get_name(blob, node, 739 NULL)); 740 goto err; 741 } 742 } else { 743 count = cell_count; 744 } 745 746 /* 747 * Make sure that the arguments actually fit in the 748 * remaining property data length 749 */ 750 if (list + count > list_end) { 751 debug("%s: arguments longer than property\n", 752 fdt_get_name(blob, src_node, NULL)); 753 goto err; 754 } 755 } 756 757 /* 758 * All of the error cases above bail out of the loop, so at 759 * this point, the parsing is successful. If the requested 760 * index matches, then fill the out_args structure and return, 761 * or return -ENOENT for an empty entry. 762 */ 763 rc = -ENOENT; 764 if (cur_index == index) { 765 if (!phandle) 766 goto err; 767 768 if (out_args) { 769 int i; 770 771 if (count > MAX_PHANDLE_ARGS) { 772 debug("%s: too many arguments %d\n", 773 fdt_get_name(blob, src_node, 774 NULL), count); 775 count = MAX_PHANDLE_ARGS; 776 } 777 out_args->node = node; 778 out_args->args_count = count; 779 for (i = 0; i < count; i++) { 780 out_args->args[i] = 781 be32_to_cpup(list++); 782 } 783 } 784 785 /* Found it! return success */ 786 return 0; 787 } 788 789 node = -1; 790 list += count; 791 cur_index++; 792 } 793 794 /* 795 * Result will be one of: 796 * -ENOENT : index is for empty phandle 797 * -EINVAL : parsing error on data 798 * [1..n] : Number of phandle (count mode; when index = -1) 799 */ 800 rc = index < 0 ? cur_index : -ENOENT; 801 err: 802 return rc; 803 } 804 805 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 806 u8 *array, int count) 807 { 808 const u8 *cell; 809 int err; 810 811 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 812 if (!err) 813 memcpy(array, cell, count); 814 return err; 815 } 816 817 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 818 const char *prop_name, int count) 819 { 820 const u8 *cell; 821 int err; 822 823 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 824 if (err) 825 return NULL; 826 return cell; 827 } 828 829 int fdtdec_get_config_int(const void *blob, const char *prop_name, 830 int default_val) 831 { 832 int config_node; 833 834 debug("%s: %s\n", __func__, prop_name); 835 config_node = fdt_path_offset(blob, "/config"); 836 if (config_node < 0) 837 return default_val; 838 return fdtdec_get_int(blob, config_node, prop_name, default_val); 839 } 840 841 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 842 { 843 int config_node; 844 const void *prop; 845 846 debug("%s: %s\n", __func__, prop_name); 847 config_node = fdt_path_offset(blob, "/config"); 848 if (config_node < 0) 849 return 0; 850 prop = fdt_get_property(blob, config_node, prop_name, NULL); 851 852 return prop != NULL; 853 } 854 855 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 856 { 857 const char *nodep; 858 int nodeoffset; 859 int len; 860 861 debug("%s: %s\n", __func__, prop_name); 862 nodeoffset = fdt_path_offset(blob, "/config"); 863 if (nodeoffset < 0) 864 return NULL; 865 866 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 867 if (!nodep) 868 return NULL; 869 870 return (char *)nodep; 871 } 872 873 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 874 fdt_addr_t *basep, fdt_size_t *sizep) 875 { 876 const fdt_addr_t *cell; 877 int len; 878 879 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 880 prop_name); 881 cell = fdt_getprop(blob, node, prop_name, &len); 882 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 883 debug("cell=%p, len=%d\n", cell, len); 884 return -1; 885 } 886 887 *basep = fdt_addr_to_cpu(*cell); 888 *sizep = fdt_size_to_cpu(cell[1]); 889 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 890 (ulong)*sizep); 891 892 return 0; 893 } 894 895 /** 896 * Read a flash entry from the fdt 897 * 898 * @param blob FDT blob 899 * @param node Offset of node to read 900 * @param name Name of node being read 901 * @param entry Place to put offset and size of this node 902 * @return 0 if ok, -ve on error 903 */ 904 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 905 struct fmap_entry *entry) 906 { 907 const char *prop; 908 u32 reg[2]; 909 910 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 911 debug("Node '%s' has bad/missing 'reg' property\n", name); 912 return -FDT_ERR_NOTFOUND; 913 } 914 entry->offset = reg[0]; 915 entry->length = reg[1]; 916 entry->used = fdtdec_get_int(blob, node, "used", entry->length); 917 prop = fdt_getprop(blob, node, "compress", NULL); 918 entry->compress_algo = prop && !strcmp(prop, "lzo") ? 919 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; 920 prop = fdt_getprop(blob, node, "hash", &entry->hash_size); 921 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; 922 entry->hash = (uint8_t *)prop; 923 924 return 0; 925 } 926 927 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 928 { 929 u64 number = 0; 930 931 while (cells--) 932 number = (number << 32) | fdt32_to_cpu(*ptr++); 933 934 return number; 935 } 936 937 int fdt_get_resource(const void *fdt, int node, const char *property, 938 unsigned int index, struct fdt_resource *res) 939 { 940 const fdt32_t *ptr, *end; 941 int na, ns, len, parent; 942 unsigned int i = 0; 943 944 parent = fdt_parent_offset(fdt, node); 945 if (parent < 0) 946 return parent; 947 948 na = fdt_address_cells(fdt, parent); 949 ns = fdt_size_cells(fdt, parent); 950 951 ptr = fdt_getprop(fdt, node, property, &len); 952 if (!ptr) 953 return len; 954 955 end = ptr + len / sizeof(*ptr); 956 957 while (ptr + na + ns <= end) { 958 if (i == index) { 959 res->start = res->end = fdtdec_get_number(ptr, na); 960 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 961 return 0; 962 } 963 964 ptr += na + ns; 965 i++; 966 } 967 968 return -FDT_ERR_NOTFOUND; 969 } 970 971 int fdt_get_named_resource(const void *fdt, int node, const char *property, 972 const char *prop_names, const char *name, 973 struct fdt_resource *res) 974 { 975 int index; 976 977 index = fdt_find_string(fdt, node, prop_names, name); 978 if (index < 0) 979 return index; 980 981 return fdt_get_resource(fdt, node, property, index, res); 982 } 983 984 int fdtdec_decode_memory_region(const void *blob, int config_node, 985 const char *mem_type, const char *suffix, 986 fdt_addr_t *basep, fdt_size_t *sizep) 987 { 988 char prop_name[50]; 989 const char *mem; 990 fdt_size_t size, offset_size; 991 fdt_addr_t base, offset; 992 int node; 993 994 if (config_node == -1) { 995 config_node = fdt_path_offset(blob, "/config"); 996 if (config_node < 0) { 997 debug("%s: Cannot find /config node\n", __func__); 998 return -ENOENT; 999 } 1000 } 1001 if (!suffix) 1002 suffix = ""; 1003 1004 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 1005 suffix); 1006 mem = fdt_getprop(blob, config_node, prop_name, NULL); 1007 if (!mem) { 1008 debug("%s: No memory type for '%s', using /memory\n", __func__, 1009 prop_name); 1010 mem = "/memory"; 1011 } 1012 1013 node = fdt_path_offset(blob, mem); 1014 if (node < 0) { 1015 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 1016 fdt_strerror(node)); 1017 return -ENOENT; 1018 } 1019 1020 /* 1021 * Not strictly correct - the memory may have multiple banks. We just 1022 * use the first 1023 */ 1024 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 1025 debug("%s: Failed to decode memory region %s\n", __func__, 1026 mem); 1027 return -EINVAL; 1028 } 1029 1030 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 1031 suffix); 1032 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 1033 &offset_size)) { 1034 debug("%s: Failed to decode memory region '%s'\n", __func__, 1035 prop_name); 1036 return -EINVAL; 1037 } 1038 1039 *basep = base + offset; 1040 *sizep = offset_size; 1041 1042 return 0; 1043 } 1044 1045 static int decode_timing_property(const void *blob, int node, const char *name, 1046 struct timing_entry *result) 1047 { 1048 int length, ret = 0; 1049 const u32 *prop; 1050 1051 prop = fdt_getprop(blob, node, name, &length); 1052 if (!prop) { 1053 debug("%s: could not find property %s\n", 1054 fdt_get_name(blob, node, NULL), name); 1055 return length; 1056 } 1057 1058 if (length == sizeof(u32)) { 1059 result->typ = fdtdec_get_int(blob, node, name, 0); 1060 result->min = result->typ; 1061 result->max = result->typ; 1062 } else { 1063 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3); 1064 } 1065 1066 return ret; 1067 } 1068 1069 int fdtdec_decode_display_timing(const void *blob, int parent, int index, 1070 struct display_timing *dt) 1071 { 1072 int i, node, timings_node; 1073 u32 val = 0; 1074 int ret = 0; 1075 1076 timings_node = fdt_subnode_offset(blob, parent, "display-timings"); 1077 if (timings_node < 0) 1078 return timings_node; 1079 1080 for (i = 0, node = fdt_first_subnode(blob, timings_node); 1081 node > 0 && i != index; 1082 node = fdt_next_subnode(blob, node)) 1083 i++; 1084 1085 if (node < 0) 1086 return node; 1087 1088 memset(dt, 0, sizeof(*dt)); 1089 1090 ret |= decode_timing_property(blob, node, "hback-porch", 1091 &dt->hback_porch); 1092 ret |= decode_timing_property(blob, node, "hfront-porch", 1093 &dt->hfront_porch); 1094 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive); 1095 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len); 1096 ret |= decode_timing_property(blob, node, "vback-porch", 1097 &dt->vback_porch); 1098 ret |= decode_timing_property(blob, node, "vfront-porch", 1099 &dt->vfront_porch); 1100 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive); 1101 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len); 1102 ret |= decode_timing_property(blob, node, "clock-frequency", 1103 &dt->pixelclock); 1104 1105 dt->flags = 0; 1106 val = fdtdec_get_int(blob, node, "vsync-active", -1); 1107 if (val != -1) { 1108 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : 1109 DISPLAY_FLAGS_VSYNC_LOW; 1110 } 1111 val = fdtdec_get_int(blob, node, "hsync-active", -1); 1112 if (val != -1) { 1113 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : 1114 DISPLAY_FLAGS_HSYNC_LOW; 1115 } 1116 val = fdtdec_get_int(blob, node, "de-active", -1); 1117 if (val != -1) { 1118 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : 1119 DISPLAY_FLAGS_DE_LOW; 1120 } 1121 val = fdtdec_get_int(blob, node, "pixelclk-active", -1); 1122 if (val != -1) { 1123 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : 1124 DISPLAY_FLAGS_PIXDATA_NEGEDGE; 1125 } 1126 1127 if (fdtdec_get_bool(blob, node, "interlaced")) 1128 dt->flags |= DISPLAY_FLAGS_INTERLACED; 1129 if (fdtdec_get_bool(blob, node, "doublescan")) 1130 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; 1131 if (fdtdec_get_bool(blob, node, "doubleclk")) 1132 dt->flags |= DISPLAY_FLAGS_DOUBLECLK; 1133 1134 return 0; 1135 } 1136 1137 int fdtdec_setup(void) 1138 { 1139 #ifdef CONFIG_OF_CONTROL 1140 # ifdef CONFIG_OF_EMBED 1141 /* Get a pointer to the FDT */ 1142 gd->fdt_blob = __dtb_dt_begin; 1143 # elif defined CONFIG_OF_SEPARATE 1144 # ifdef CONFIG_SPL_BUILD 1145 /* FDT is at end of BSS */ 1146 gd->fdt_blob = (ulong *)&__bss_end; 1147 # else 1148 /* FDT is at end of image */ 1149 gd->fdt_blob = (ulong *)&_end; 1150 #endif 1151 # elif defined(CONFIG_OF_HOSTFILE) 1152 if (sandbox_read_fdt_from_file()) { 1153 puts("Failed to read control FDT\n"); 1154 return -1; 1155 } 1156 # endif 1157 # ifndef CONFIG_SPL_BUILD 1158 /* Allow the early environment to override the fdt address */ 1159 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, 1160 (uintptr_t)gd->fdt_blob); 1161 # endif 1162 #endif 1163 return fdtdec_prepare_fdt(); 1164 } 1165 1166 #endif /* !USE_HOSTCC */ 1167