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_TEGRA210_SDMMC, "nvidia,tegra210-sdhci"), 35 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"), 36 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"), 37 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"), 38 COMPAT(NVIDIA_TEGRA124_PCIE, "nvidia,tegra124-pcie"), 39 COMPAT(NVIDIA_TEGRA30_PCIE, "nvidia,tegra30-pcie"), 40 COMPAT(NVIDIA_TEGRA20_PCIE, "nvidia,tegra20-pcie"), 41 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"), 42 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"), 43 COMPAT(SMSC_LAN9215, "smsc,lan9215"), 44 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), 45 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), 46 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), 47 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), 48 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"), 49 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), 50 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"), 51 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), 52 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"), 53 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"), 54 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"), 55 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), 56 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), 57 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"), 58 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"), 59 COMPAT(GENERIC_SPI_FLASH, "spi-flash"), 60 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), 61 COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"), 62 COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645tt"), 63 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), 64 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"), 65 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), 66 COMPAT(INTEL_MICROCODE, "intel,microcode"), 67 COMPAT(MEMORY_SPD, "memory-spd"), 68 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"), 69 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"), 70 COMPAT(INTEL_GMA, "intel,gma"), 71 COMPAT(AMS_AS3722, "ams,as3722"), 72 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"), 73 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"), 74 COMPAT(INTEL_X86_PINCTRL, "intel,x86-pinctrl"), 75 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"), 76 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"), 77 COMPAT(COMPAT_INTEL_IRQ_ROUTER, "intel,irq-router"), 78 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"), 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 fdt32_t *ptr, *end; 92 int parent, na, ns, len; 93 fdt_addr_t addr; 94 95 debug("%s: %s: ", __func__, prop_name); 96 97 parent = fdt_parent_offset(blob, node); 98 if (parent < 0) { 99 debug("(no parent found)\n"); 100 return FDT_ADDR_T_NONE; 101 } 102 103 na = fdt_address_cells(blob, parent); 104 ns = fdt_size_cells(blob, parent); 105 106 ptr = fdt_getprop(blob, node, prop_name, &len); 107 if (!ptr) { 108 debug("(not found)\n"); 109 return FDT_ADDR_T_NONE; 110 } 111 112 end = ptr + len / sizeof(*ptr); 113 114 if (ptr + na + ns > end) { 115 debug("(not enough data: expected %d bytes, got %d bytes)\n", 116 (na + ns) * 4, len); 117 return FDT_ADDR_T_NONE; 118 } 119 120 addr = fdtdec_get_number(ptr, na); 121 122 if (sizep) { 123 *sizep = fdtdec_get_number(ptr + na, ns); 124 debug("addr=%pa, size=%pa\n", &addr, sizep); 125 } else { 126 debug("%pa\n", &addr); 127 } 128 129 return addr; 130 } 131 132 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 133 const char *prop_name) 134 { 135 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 136 } 137 138 #ifdef CONFIG_PCI 139 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 140 const char *prop_name, struct fdt_pci_addr *addr) 141 { 142 const u32 *cell; 143 int len; 144 int ret = -ENOENT; 145 146 debug("%s: %s: ", __func__, prop_name); 147 148 /* 149 * If we follow the pci bus bindings strictly, we should check 150 * the value of the node's parent node's #address-cells and 151 * #size-cells. They need to be 3 and 2 accordingly. However, 152 * for simplicity we skip the check here. 153 */ 154 cell = fdt_getprop(blob, node, prop_name, &len); 155 if (!cell) 156 goto fail; 157 158 if ((len % FDT_PCI_REG_SIZE) == 0) { 159 int num = len / FDT_PCI_REG_SIZE; 160 int i; 161 162 for (i = 0; i < num; i++) { 163 debug("pci address #%d: %08lx %08lx %08lx\n", i, 164 (ulong)fdt_addr_to_cpu(cell[0]), 165 (ulong)fdt_addr_to_cpu(cell[1]), 166 (ulong)fdt_addr_to_cpu(cell[2])); 167 if ((fdt_addr_to_cpu(*cell) & type) == type) { 168 addr->phys_hi = fdt_addr_to_cpu(cell[0]); 169 addr->phys_mid = fdt_addr_to_cpu(cell[1]); 170 addr->phys_lo = fdt_addr_to_cpu(cell[2]); 171 break; 172 } else { 173 cell += (FDT_PCI_ADDR_CELLS + 174 FDT_PCI_SIZE_CELLS); 175 } 176 } 177 178 if (i == num) { 179 ret = -ENXIO; 180 goto fail; 181 } 182 183 return 0; 184 } else { 185 ret = -EINVAL; 186 } 187 188 fail: 189 debug("(not found)\n"); 190 return ret; 191 } 192 193 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 194 { 195 const char *list, *end; 196 int len; 197 198 list = fdt_getprop(blob, node, "compatible", &len); 199 if (!list) 200 return -ENOENT; 201 202 end = list + len; 203 while (list < end) { 204 char *s; 205 206 len = strlen(list); 207 if (len >= strlen("pciVVVV,DDDD")) { 208 s = strstr(list, "pci"); 209 210 /* 211 * check if the string is something like pciVVVV,DDDD.RR 212 * or just pciVVVV,DDDD 213 */ 214 if (s && s[7] == ',' && 215 (s[12] == '.' || s[12] == 0)) { 216 s += 3; 217 *vendor = simple_strtol(s, NULL, 16); 218 219 s += 5; 220 *device = simple_strtol(s, NULL, 16); 221 222 return 0; 223 } 224 } else { 225 list += (len + 1); 226 } 227 } 228 229 return -ENOENT; 230 } 231 232 int fdtdec_get_pci_bdf(const void *blob, int node, 233 struct fdt_pci_addr *addr, pci_dev_t *bdf) 234 { 235 u16 dt_vendor, dt_device, vendor, device; 236 int ret; 237 238 /* get vendor id & device id from the compatible string */ 239 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device); 240 if (ret) 241 return ret; 242 243 /* extract the bdf from fdt_pci_addr */ 244 *bdf = addr->phys_hi & 0xffff00; 245 246 /* read vendor id & device id based on bdf */ 247 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor); 248 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device); 249 250 /* 251 * Note there are two places in the device tree to fully describe 252 * a pci device: one is via compatible string with a format of 253 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in 254 * the device node's reg address property. We read the vendor id 255 * and device id based on bdf and compare the values with the 256 * "VVVV,DDDD". If they are the same, then we are good to use bdf 257 * to read device's bar. But if they are different, we have to rely 258 * on the vendor id and device id extracted from the compatible 259 * string and locate the real bdf by pci_find_device(). This is 260 * because normally we may only know device's device number and 261 * function number when writing device tree. The bus number is 262 * dynamically assigned during the pci enumeration process. 263 */ 264 if ((dt_vendor != vendor) || (dt_device != device)) { 265 *bdf = pci_find_device(dt_vendor, dt_device, 0); 266 if (*bdf == -1) 267 return -ENODEV; 268 } 269 270 return 0; 271 } 272 273 int fdtdec_get_pci_bar32(const void *blob, int node, 274 struct fdt_pci_addr *addr, u32 *bar) 275 { 276 pci_dev_t bdf; 277 int barnum; 278 int ret; 279 280 /* get pci devices's bdf */ 281 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf); 282 if (ret) 283 return ret; 284 285 /* extract the bar number from fdt_pci_addr */ 286 barnum = addr->phys_hi & 0xff; 287 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) 288 return -EINVAL; 289 290 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; 291 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum); 292 293 return 0; 294 } 295 #endif 296 297 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 298 uint64_t default_val) 299 { 300 const uint64_t *cell64; 301 int length; 302 303 cell64 = fdt_getprop(blob, node, prop_name, &length); 304 if (!cell64 || length < sizeof(*cell64)) 305 return default_val; 306 307 return fdt64_to_cpu(*cell64); 308 } 309 310 int fdtdec_get_is_enabled(const void *blob, int node) 311 { 312 const char *cell; 313 314 /* 315 * It should say "okay", so only allow that. Some fdts use "ok" but 316 * this is a bug. Please fix your device tree source file. See here 317 * for discussion: 318 * 319 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 320 */ 321 cell = fdt_getprop(blob, node, "status", NULL); 322 if (cell) 323 return 0 == strcmp(cell, "okay"); 324 return 1; 325 } 326 327 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 328 { 329 enum fdt_compat_id id; 330 331 /* Search our drivers */ 332 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 333 if (0 == fdt_node_check_compatible(blob, node, 334 compat_names[id])) 335 return id; 336 return COMPAT_UNKNOWN; 337 } 338 339 int fdtdec_next_compatible(const void *blob, int node, 340 enum fdt_compat_id id) 341 { 342 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 343 } 344 345 int fdtdec_next_compatible_subnode(const void *blob, int node, 346 enum fdt_compat_id id, int *depthp) 347 { 348 do { 349 node = fdt_next_node(blob, node, depthp); 350 } while (*depthp > 1); 351 352 /* If this is a direct subnode, and compatible, return it */ 353 if (*depthp == 1 && 0 == fdt_node_check_compatible( 354 blob, node, compat_names[id])) 355 return node; 356 357 return -FDT_ERR_NOTFOUND; 358 } 359 360 int fdtdec_next_alias(const void *blob, const char *name, 361 enum fdt_compat_id id, int *upto) 362 { 363 #define MAX_STR_LEN 20 364 char str[MAX_STR_LEN + 20]; 365 int node, err; 366 367 /* snprintf() is not available */ 368 assert(strlen(name) < MAX_STR_LEN); 369 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 370 node = fdt_path_offset(blob, str); 371 if (node < 0) 372 return node; 373 err = fdt_node_check_compatible(blob, node, compat_names[id]); 374 if (err < 0) 375 return err; 376 if (err) 377 return -FDT_ERR_NOTFOUND; 378 (*upto)++; 379 return node; 380 } 381 382 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 383 enum fdt_compat_id id, int *node_list, int maxcount) 384 { 385 memset(node_list, '\0', sizeof(*node_list) * maxcount); 386 387 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 388 } 389 390 /* TODO: Can we tighten this code up a little? */ 391 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 392 enum fdt_compat_id id, int *node_list, int maxcount) 393 { 394 int name_len = strlen(name); 395 int nodes[maxcount]; 396 int num_found = 0; 397 int offset, node; 398 int alias_node; 399 int count; 400 int i, j; 401 402 /* find the alias node if present */ 403 alias_node = fdt_path_offset(blob, "/aliases"); 404 405 /* 406 * start with nothing, and we can assume that the root node can't 407 * match 408 */ 409 memset(nodes, '\0', sizeof(nodes)); 410 411 /* First find all the compatible nodes */ 412 for (node = count = 0; node >= 0 && count < maxcount;) { 413 node = fdtdec_next_compatible(blob, node, id); 414 if (node >= 0) 415 nodes[count++] = node; 416 } 417 if (node >= 0) 418 debug("%s: warning: maxcount exceeded with alias '%s'\n", 419 __func__, name); 420 421 /* Now find all the aliases */ 422 for (offset = fdt_first_property_offset(blob, alias_node); 423 offset > 0; 424 offset = fdt_next_property_offset(blob, offset)) { 425 const struct fdt_property *prop; 426 const char *path; 427 int number; 428 int found; 429 430 node = 0; 431 prop = fdt_get_property_by_offset(blob, offset, NULL); 432 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 433 if (prop->len && 0 == strncmp(path, name, name_len)) 434 node = fdt_path_offset(blob, prop->data); 435 if (node <= 0) 436 continue; 437 438 /* Get the alias number */ 439 number = simple_strtoul(path + name_len, NULL, 10); 440 if (number < 0 || number >= maxcount) { 441 debug("%s: warning: alias '%s' is out of range\n", 442 __func__, path); 443 continue; 444 } 445 446 /* Make sure the node we found is actually in our list! */ 447 found = -1; 448 for (j = 0; j < count; j++) 449 if (nodes[j] == node) { 450 found = j; 451 break; 452 } 453 454 if (found == -1) { 455 debug("%s: warning: alias '%s' points to a node " 456 "'%s' that is missing or is not compatible " 457 " with '%s'\n", __func__, path, 458 fdt_get_name(blob, node, NULL), 459 compat_names[id]); 460 continue; 461 } 462 463 /* 464 * Add this node to our list in the right place, and mark 465 * it as done. 466 */ 467 if (fdtdec_get_is_enabled(blob, node)) { 468 if (node_list[number]) { 469 debug("%s: warning: alias '%s' requires that " 470 "a node be placed in the list in a " 471 "position which is already filled by " 472 "node '%s'\n", __func__, path, 473 fdt_get_name(blob, node, NULL)); 474 continue; 475 } 476 node_list[number] = node; 477 if (number >= num_found) 478 num_found = number + 1; 479 } 480 nodes[found] = 0; 481 } 482 483 /* Add any nodes not mentioned by an alias */ 484 for (i = j = 0; i < maxcount; i++) { 485 if (!node_list[i]) { 486 for (; j < maxcount; j++) 487 if (nodes[j] && 488 fdtdec_get_is_enabled(blob, nodes[j])) 489 break; 490 491 /* Have we run out of nodes to add? */ 492 if (j == maxcount) 493 break; 494 495 assert(!node_list[i]); 496 node_list[i] = nodes[j++]; 497 if (i >= num_found) 498 num_found = i + 1; 499 } 500 } 501 502 return num_found; 503 } 504 505 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 506 int *seqp) 507 { 508 int base_len = strlen(base); 509 const char *find_name; 510 int find_namelen; 511 int prop_offset; 512 int aliases; 513 514 find_name = fdt_get_name(blob, offset, &find_namelen); 515 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 516 517 aliases = fdt_path_offset(blob, "/aliases"); 518 for (prop_offset = fdt_first_property_offset(blob, aliases); 519 prop_offset > 0; 520 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 521 const char *prop; 522 const char *name; 523 const char *slash; 524 int len, val; 525 526 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 527 debug(" - %s, %s\n", name, prop); 528 if (len < find_namelen || *prop != '/' || prop[len - 1] || 529 strncmp(name, base, base_len)) 530 continue; 531 532 slash = strrchr(prop, '/'); 533 if (strcmp(slash + 1, find_name)) 534 continue; 535 val = trailing_strtol(name); 536 if (val != -1) { 537 *seqp = val; 538 debug("Found seq %d\n", *seqp); 539 return 0; 540 } 541 } 542 543 debug("Not found\n"); 544 return -ENOENT; 545 } 546 547 int fdtdec_get_chosen_node(const void *blob, const char *name) 548 { 549 const char *prop; 550 int chosen_node; 551 int len; 552 553 if (!blob) 554 return -FDT_ERR_NOTFOUND; 555 chosen_node = fdt_path_offset(blob, "/chosen"); 556 prop = fdt_getprop(blob, chosen_node, name, &len); 557 if (!prop) 558 return -FDT_ERR_NOTFOUND; 559 return fdt_path_offset(blob, prop); 560 } 561 562 int fdtdec_check_fdt(void) 563 { 564 /* 565 * We must have an FDT, but we cannot panic() yet since the console 566 * is not ready. So for now, just assert(). Boards which need an early 567 * FDT (prior to console ready) will need to make their own 568 * arrangements and do their own checks. 569 */ 570 assert(!fdtdec_prepare_fdt()); 571 return 0; 572 } 573 574 /* 575 * This function is a little odd in that it accesses global data. At some 576 * point if the architecture board.c files merge this will make more sense. 577 * Even now, it is common code. 578 */ 579 int fdtdec_prepare_fdt(void) 580 { 581 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 582 fdt_check_header(gd->fdt_blob)) { 583 #ifdef CONFIG_SPL_BUILD 584 puts("Missing DTB\n"); 585 #else 586 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"); 587 # ifdef DEBUG 588 if (gd->fdt_blob) { 589 printf("fdt_blob=%p\n", gd->fdt_blob); 590 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4, 591 32, 0); 592 } 593 # endif 594 #endif 595 return -1; 596 } 597 return 0; 598 } 599 600 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 601 { 602 const u32 *phandle; 603 int lookup; 604 605 debug("%s: %s\n", __func__, prop_name); 606 phandle = fdt_getprop(blob, node, prop_name, NULL); 607 if (!phandle) 608 return -FDT_ERR_NOTFOUND; 609 610 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 611 return lookup; 612 } 613 614 /** 615 * Look up a property in a node and check that it has a minimum length. 616 * 617 * @param blob FDT blob 618 * @param node node to examine 619 * @param prop_name name of property to find 620 * @param min_len minimum property length in bytes 621 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 622 found, or -FDT_ERR_BADLAYOUT if not enough data 623 * @return pointer to cell, which is only valid if err == 0 624 */ 625 static const void *get_prop_check_min_len(const void *blob, int node, 626 const char *prop_name, int min_len, int *err) 627 { 628 const void *cell; 629 int len; 630 631 debug("%s: %s\n", __func__, prop_name); 632 cell = fdt_getprop(blob, node, prop_name, &len); 633 if (!cell) 634 *err = -FDT_ERR_NOTFOUND; 635 else if (len < min_len) 636 *err = -FDT_ERR_BADLAYOUT; 637 else 638 *err = 0; 639 return cell; 640 } 641 642 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 643 u32 *array, int count) 644 { 645 const u32 *cell; 646 int i, err = 0; 647 648 debug("%s: %s\n", __func__, prop_name); 649 cell = get_prop_check_min_len(blob, node, prop_name, 650 sizeof(u32) * count, &err); 651 if (!err) { 652 for (i = 0; i < count; i++) 653 array[i] = fdt32_to_cpu(cell[i]); 654 } 655 return err; 656 } 657 658 int fdtdec_get_int_array_count(const void *blob, int node, 659 const char *prop_name, u32 *array, int count) 660 { 661 const u32 *cell; 662 int len, elems; 663 int i; 664 665 debug("%s: %s\n", __func__, prop_name); 666 cell = fdt_getprop(blob, node, prop_name, &len); 667 if (!cell) 668 return -FDT_ERR_NOTFOUND; 669 elems = len / sizeof(u32); 670 if (count > elems) 671 count = elems; 672 for (i = 0; i < count; i++) 673 array[i] = fdt32_to_cpu(cell[i]); 674 675 return count; 676 } 677 678 const u32 *fdtdec_locate_array(const void *blob, int node, 679 const char *prop_name, int count) 680 { 681 const u32 *cell; 682 int err; 683 684 cell = get_prop_check_min_len(blob, node, prop_name, 685 sizeof(u32) * count, &err); 686 return err ? NULL : cell; 687 } 688 689 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 690 { 691 const s32 *cell; 692 int len; 693 694 debug("%s: %s\n", __func__, prop_name); 695 cell = fdt_getprop(blob, node, prop_name, &len); 696 return cell != NULL; 697 } 698 699 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 700 const char *list_name, 701 const char *cells_name, 702 int cell_count, int index, 703 struct fdtdec_phandle_args *out_args) 704 { 705 const __be32 *list, *list_end; 706 int rc = 0, size, cur_index = 0; 707 uint32_t count = 0; 708 int node = -1; 709 int phandle; 710 711 /* Retrieve the phandle list property */ 712 list = fdt_getprop(blob, src_node, list_name, &size); 713 if (!list) 714 return -ENOENT; 715 list_end = list + size / sizeof(*list); 716 717 /* Loop over the phandles until all the requested entry is found */ 718 while (list < list_end) { 719 rc = -EINVAL; 720 count = 0; 721 722 /* 723 * If phandle is 0, then it is an empty entry with no 724 * arguments. Skip forward to the next entry. 725 */ 726 phandle = be32_to_cpup(list++); 727 if (phandle) { 728 /* 729 * Find the provider node and parse the #*-cells 730 * property to determine the argument length. 731 * 732 * This is not needed if the cell count is hard-coded 733 * (i.e. cells_name not set, but cell_count is set), 734 * except when we're going to return the found node 735 * below. 736 */ 737 if (cells_name || cur_index == index) { 738 node = fdt_node_offset_by_phandle(blob, 739 phandle); 740 if (!node) { 741 debug("%s: could not find phandle\n", 742 fdt_get_name(blob, src_node, 743 NULL)); 744 goto err; 745 } 746 } 747 748 if (cells_name) { 749 count = fdtdec_get_int(blob, node, cells_name, 750 -1); 751 if (count == -1) { 752 debug("%s: could not get %s for %s\n", 753 fdt_get_name(blob, src_node, 754 NULL), 755 cells_name, 756 fdt_get_name(blob, node, 757 NULL)); 758 goto err; 759 } 760 } else { 761 count = cell_count; 762 } 763 764 /* 765 * Make sure that the arguments actually fit in the 766 * remaining property data length 767 */ 768 if (list + count > list_end) { 769 debug("%s: arguments longer than property\n", 770 fdt_get_name(blob, src_node, NULL)); 771 goto err; 772 } 773 } 774 775 /* 776 * All of the error cases above bail out of the loop, so at 777 * this point, the parsing is successful. If the requested 778 * index matches, then fill the out_args structure and return, 779 * or return -ENOENT for an empty entry. 780 */ 781 rc = -ENOENT; 782 if (cur_index == index) { 783 if (!phandle) 784 goto err; 785 786 if (out_args) { 787 int i; 788 789 if (count > MAX_PHANDLE_ARGS) { 790 debug("%s: too many arguments %d\n", 791 fdt_get_name(blob, src_node, 792 NULL), count); 793 count = MAX_PHANDLE_ARGS; 794 } 795 out_args->node = node; 796 out_args->args_count = count; 797 for (i = 0; i < count; i++) { 798 out_args->args[i] = 799 be32_to_cpup(list++); 800 } 801 } 802 803 /* Found it! return success */ 804 return 0; 805 } 806 807 node = -1; 808 list += count; 809 cur_index++; 810 } 811 812 /* 813 * Result will be one of: 814 * -ENOENT : index is for empty phandle 815 * -EINVAL : parsing error on data 816 * [1..n] : Number of phandle (count mode; when index = -1) 817 */ 818 rc = index < 0 ? cur_index : -ENOENT; 819 err: 820 return rc; 821 } 822 823 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 824 u8 *array, int count) 825 { 826 const u8 *cell; 827 int err; 828 829 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 830 if (!err) 831 memcpy(array, cell, count); 832 return err; 833 } 834 835 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 836 const char *prop_name, int count) 837 { 838 const u8 *cell; 839 int err; 840 841 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 842 if (err) 843 return NULL; 844 return cell; 845 } 846 847 int fdtdec_get_config_int(const void *blob, const char *prop_name, 848 int default_val) 849 { 850 int config_node; 851 852 debug("%s: %s\n", __func__, prop_name); 853 config_node = fdt_path_offset(blob, "/config"); 854 if (config_node < 0) 855 return default_val; 856 return fdtdec_get_int(blob, config_node, prop_name, default_val); 857 } 858 859 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 860 { 861 int config_node; 862 const void *prop; 863 864 debug("%s: %s\n", __func__, prop_name); 865 config_node = fdt_path_offset(blob, "/config"); 866 if (config_node < 0) 867 return 0; 868 prop = fdt_get_property(blob, config_node, prop_name, NULL); 869 870 return prop != NULL; 871 } 872 873 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 874 { 875 const char *nodep; 876 int nodeoffset; 877 int len; 878 879 debug("%s: %s\n", __func__, prop_name); 880 nodeoffset = fdt_path_offset(blob, "/config"); 881 if (nodeoffset < 0) 882 return NULL; 883 884 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 885 if (!nodep) 886 return NULL; 887 888 return (char *)nodep; 889 } 890 891 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 892 fdt_addr_t *basep, fdt_size_t *sizep) 893 { 894 const fdt_addr_t *cell; 895 int len; 896 897 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 898 prop_name); 899 cell = fdt_getprop(blob, node, prop_name, &len); 900 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 901 debug("cell=%p, len=%d\n", cell, len); 902 return -1; 903 } 904 905 *basep = fdt_addr_to_cpu(*cell); 906 *sizep = fdt_size_to_cpu(cell[1]); 907 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 908 (ulong)*sizep); 909 910 return 0; 911 } 912 913 /** 914 * Read a flash entry from the fdt 915 * 916 * @param blob FDT blob 917 * @param node Offset of node to read 918 * @param name Name of node being read 919 * @param entry Place to put offset and size of this node 920 * @return 0 if ok, -ve on error 921 */ 922 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 923 struct fmap_entry *entry) 924 { 925 const char *prop; 926 u32 reg[2]; 927 928 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 929 debug("Node '%s' has bad/missing 'reg' property\n", name); 930 return -FDT_ERR_NOTFOUND; 931 } 932 entry->offset = reg[0]; 933 entry->length = reg[1]; 934 entry->used = fdtdec_get_int(blob, node, "used", entry->length); 935 prop = fdt_getprop(blob, node, "compress", NULL); 936 entry->compress_algo = prop && !strcmp(prop, "lzo") ? 937 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; 938 prop = fdt_getprop(blob, node, "hash", &entry->hash_size); 939 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; 940 entry->hash = (uint8_t *)prop; 941 942 return 0; 943 } 944 945 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 946 { 947 u64 number = 0; 948 949 while (cells--) 950 number = (number << 32) | fdt32_to_cpu(*ptr++); 951 952 return number; 953 } 954 955 int fdt_get_resource(const void *fdt, int node, const char *property, 956 unsigned int index, struct fdt_resource *res) 957 { 958 const fdt32_t *ptr, *end; 959 int na, ns, len, parent; 960 unsigned int i = 0; 961 962 parent = fdt_parent_offset(fdt, node); 963 if (parent < 0) 964 return parent; 965 966 na = fdt_address_cells(fdt, parent); 967 ns = fdt_size_cells(fdt, parent); 968 969 ptr = fdt_getprop(fdt, node, property, &len); 970 if (!ptr) 971 return len; 972 973 end = ptr + len / sizeof(*ptr); 974 975 while (ptr + na + ns <= end) { 976 if (i == index) { 977 res->start = res->end = fdtdec_get_number(ptr, na); 978 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 979 return 0; 980 } 981 982 ptr += na + ns; 983 i++; 984 } 985 986 return -FDT_ERR_NOTFOUND; 987 } 988 989 int fdt_get_named_resource(const void *fdt, int node, const char *property, 990 const char *prop_names, const char *name, 991 struct fdt_resource *res) 992 { 993 int index; 994 995 index = fdt_find_string(fdt, node, prop_names, name); 996 if (index < 0) 997 return index; 998 999 return fdt_get_resource(fdt, node, property, index, res); 1000 } 1001 1002 int fdtdec_decode_memory_region(const void *blob, int config_node, 1003 const char *mem_type, const char *suffix, 1004 fdt_addr_t *basep, fdt_size_t *sizep) 1005 { 1006 char prop_name[50]; 1007 const char *mem; 1008 fdt_size_t size, offset_size; 1009 fdt_addr_t base, offset; 1010 int node; 1011 1012 if (config_node == -1) { 1013 config_node = fdt_path_offset(blob, "/config"); 1014 if (config_node < 0) { 1015 debug("%s: Cannot find /config node\n", __func__); 1016 return -ENOENT; 1017 } 1018 } 1019 if (!suffix) 1020 suffix = ""; 1021 1022 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 1023 suffix); 1024 mem = fdt_getprop(blob, config_node, prop_name, NULL); 1025 if (!mem) { 1026 debug("%s: No memory type for '%s', using /memory\n", __func__, 1027 prop_name); 1028 mem = "/memory"; 1029 } 1030 1031 node = fdt_path_offset(blob, mem); 1032 if (node < 0) { 1033 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 1034 fdt_strerror(node)); 1035 return -ENOENT; 1036 } 1037 1038 /* 1039 * Not strictly correct - the memory may have multiple banks. We just 1040 * use the first 1041 */ 1042 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 1043 debug("%s: Failed to decode memory region %s\n", __func__, 1044 mem); 1045 return -EINVAL; 1046 } 1047 1048 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 1049 suffix); 1050 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 1051 &offset_size)) { 1052 debug("%s: Failed to decode memory region '%s'\n", __func__, 1053 prop_name); 1054 return -EINVAL; 1055 } 1056 1057 *basep = base + offset; 1058 *sizep = offset_size; 1059 1060 return 0; 1061 } 1062 1063 static int decode_timing_property(const void *blob, int node, const char *name, 1064 struct timing_entry *result) 1065 { 1066 int length, ret = 0; 1067 const u32 *prop; 1068 1069 prop = fdt_getprop(blob, node, name, &length); 1070 if (!prop) { 1071 debug("%s: could not find property %s\n", 1072 fdt_get_name(blob, node, NULL), name); 1073 return length; 1074 } 1075 1076 if (length == sizeof(u32)) { 1077 result->typ = fdtdec_get_int(blob, node, name, 0); 1078 result->min = result->typ; 1079 result->max = result->typ; 1080 } else { 1081 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3); 1082 } 1083 1084 return ret; 1085 } 1086 1087 int fdtdec_decode_display_timing(const void *blob, int parent, int index, 1088 struct display_timing *dt) 1089 { 1090 int i, node, timings_node; 1091 u32 val = 0; 1092 int ret = 0; 1093 1094 timings_node = fdt_subnode_offset(blob, parent, "display-timings"); 1095 if (timings_node < 0) 1096 return timings_node; 1097 1098 for (i = 0, node = fdt_first_subnode(blob, timings_node); 1099 node > 0 && i != index; 1100 node = fdt_next_subnode(blob, node)) 1101 i++; 1102 1103 if (node < 0) 1104 return node; 1105 1106 memset(dt, 0, sizeof(*dt)); 1107 1108 ret |= decode_timing_property(blob, node, "hback-porch", 1109 &dt->hback_porch); 1110 ret |= decode_timing_property(blob, node, "hfront-porch", 1111 &dt->hfront_porch); 1112 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive); 1113 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len); 1114 ret |= decode_timing_property(blob, node, "vback-porch", 1115 &dt->vback_porch); 1116 ret |= decode_timing_property(blob, node, "vfront-porch", 1117 &dt->vfront_porch); 1118 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive); 1119 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len); 1120 ret |= decode_timing_property(blob, node, "clock-frequency", 1121 &dt->pixelclock); 1122 1123 dt->flags = 0; 1124 val = fdtdec_get_int(blob, node, "vsync-active", -1); 1125 if (val != -1) { 1126 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : 1127 DISPLAY_FLAGS_VSYNC_LOW; 1128 } 1129 val = fdtdec_get_int(blob, node, "hsync-active", -1); 1130 if (val != -1) { 1131 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : 1132 DISPLAY_FLAGS_HSYNC_LOW; 1133 } 1134 val = fdtdec_get_int(blob, node, "de-active", -1); 1135 if (val != -1) { 1136 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : 1137 DISPLAY_FLAGS_DE_LOW; 1138 } 1139 val = fdtdec_get_int(blob, node, "pixelclk-active", -1); 1140 if (val != -1) { 1141 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : 1142 DISPLAY_FLAGS_PIXDATA_NEGEDGE; 1143 } 1144 1145 if (fdtdec_get_bool(blob, node, "interlaced")) 1146 dt->flags |= DISPLAY_FLAGS_INTERLACED; 1147 if (fdtdec_get_bool(blob, node, "doublescan")) 1148 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; 1149 if (fdtdec_get_bool(blob, node, "doubleclk")) 1150 dt->flags |= DISPLAY_FLAGS_DOUBLECLK; 1151 1152 return 0; 1153 } 1154 1155 int fdtdec_setup(void) 1156 { 1157 #ifdef CONFIG_OF_CONTROL 1158 # ifdef CONFIG_OF_EMBED 1159 /* Get a pointer to the FDT */ 1160 gd->fdt_blob = __dtb_dt_begin; 1161 # elif defined CONFIG_OF_SEPARATE 1162 # ifdef CONFIG_SPL_BUILD 1163 /* FDT is at end of BSS */ 1164 gd->fdt_blob = (ulong *)&__bss_end; 1165 # else 1166 /* FDT is at end of image */ 1167 gd->fdt_blob = (ulong *)&_end; 1168 # endif 1169 # elif defined(CONFIG_OF_HOSTFILE) 1170 if (sandbox_read_fdt_from_file()) { 1171 puts("Failed to read control FDT\n"); 1172 return -1; 1173 } 1174 # endif 1175 # ifndef CONFIG_SPL_BUILD 1176 /* Allow the early environment to override the fdt address */ 1177 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, 1178 (uintptr_t)gd->fdt_blob); 1179 # endif 1180 #endif 1181 return fdtdec_prepare_fdt(); 1182 } 1183 1184 #endif /* !USE_HOSTCC */ 1185