1 /* 2 * Copyright (c) 2011 The Chromium OS Authors. 3 * SPDX-License-Identifier: GPL-2.0+ 4 */ 5 6 #ifndef USE_HOSTCC 7 #include <boot_fit.h> 8 #include <common.h> 9 #include <dm.h> 10 #include <errno.h> 11 #include <serial.h> 12 #include <libfdt.h> 13 #include <fdt_support.h> 14 #include <fdtdec.h> 15 #include <asm/sections.h> 16 #include <dm/of_extra.h> 17 #include <linux/ctype.h> 18 19 DECLARE_GLOBAL_DATA_PTR; 20 21 /* 22 * Here are the type we know about. One day we might allow drivers to 23 * register. For now we just put them here. The COMPAT macro allows us to 24 * turn this into a sparse list later, and keeps the ID with the name. 25 * 26 * NOTE: This list is basically a TODO list for things that need to be 27 * converted to driver model. So don't add new things here unless there is a 28 * good reason why driver-model conversion is infeasible. Examples include 29 * things which are used before driver model is available. 30 */ 31 #define COMPAT(id, name) name 32 static const char * const compat_names[COMPAT_COUNT] = { 33 COMPAT(UNKNOWN, "<none>"), 34 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"), 35 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"), 36 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"), 37 COMPAT(NVIDIA_TEGRA124_PMC, "nvidia,tegra124-pmc"), 38 COMPAT(NVIDIA_TEGRA186_SDMMC, "nvidia,tegra186-sdhci"), 39 COMPAT(NVIDIA_TEGRA210_SDMMC, "nvidia,tegra210-sdhci"), 40 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"), 41 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"), 42 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"), 43 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"), 44 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"), 45 COMPAT(SMSC_LAN9215, "smsc,lan9215"), 46 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), 47 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), 48 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), 49 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), 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_MIPI_DSI, "samsung,exynos-mipi-dsi"), 54 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), 55 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), 56 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"), 57 COMPAT(GENERIC_SPI_FLASH, "spi-flash"), 58 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), 59 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), 60 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), 61 COMPAT(INTEL_MICROCODE, "intel,microcode"), 62 COMPAT(AMS_AS3722, "ams,as3722"), 63 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"), 64 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"), 65 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"), 66 COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"), 67 COMPAT(INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"), 68 COMPAT(INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"), 69 COMPAT(INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"), 70 COMPAT(COMPAT_SUNXI_NAND, "allwinner,sun4i-a10-nand"), 71 COMPAT(ALTERA_SOCFPGA_CLK, "altr,clk-mgr"), 72 COMPAT(ALTERA_SOCFPGA_PINCTRL_SINGLE, "pinctrl-single"), 73 COMPAT(ALTERA_SOCFPGA_H2F_BRG, "altr,socfpga-hps2fpga-bridge"), 74 COMPAT(ALTERA_SOCFPGA_LWH2F_BRG, "altr,socfpga-lwhps2fpga-bridge"), 75 COMPAT(ALTERA_SOCFPGA_F2H_BRG, "altr,socfpga-fpga2hps-bridge"), 76 COMPAT(ALTERA_SOCFPGA_F2SDR0, "altr,socfpga-fpga2sdram0-bridge"), 77 COMPAT(ALTERA_SOCFPGA_F2SDR1, "altr,socfpga-fpga2sdram1-bridge"), 78 COMPAT(ALTERA_SOCFPGA_F2SDR2, "altr,socfpga-fpga2sdram2-bridge"), 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_fixed(const void *blob, int node, 89 const char *prop_name, int index, int na, int ns, 90 fdt_size_t *sizep, bool translate) 91 { 92 const fdt32_t *prop, *prop_end; 93 const fdt32_t *prop_addr, *prop_size, *prop_after_size; 94 int len; 95 fdt_addr_t addr; 96 97 debug("%s: %s: ", __func__, prop_name); 98 99 if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) { 100 debug("(na too large for fdt_addr_t type)\n"); 101 return FDT_ADDR_T_NONE; 102 } 103 104 if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) { 105 debug("(ns too large for fdt_size_t type)\n"); 106 return FDT_ADDR_T_NONE; 107 } 108 109 prop = fdt_getprop(blob, node, prop_name, &len); 110 if (!prop) { 111 debug("(not found)\n"); 112 return FDT_ADDR_T_NONE; 113 } 114 prop_end = prop + (len / sizeof(*prop)); 115 116 prop_addr = prop + (index * (na + ns)); 117 prop_size = prop_addr + na; 118 prop_after_size = prop_size + ns; 119 if (prop_after_size > prop_end) { 120 debug("(not enough data: expected >= %d cells, got %d cells)\n", 121 (u32)(prop_after_size - prop), ((u32)(prop_end - prop))); 122 return FDT_ADDR_T_NONE; 123 } 124 125 #if CONFIG_IS_ENABLED(OF_TRANSLATE) 126 if (translate) 127 addr = fdt_translate_address(blob, node, prop_addr); 128 else 129 #endif 130 addr = fdtdec_get_number(prop_addr, na); 131 132 if (sizep) { 133 *sizep = fdtdec_get_number(prop_size, ns); 134 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr, 135 (unsigned long long)*sizep); 136 } else { 137 debug("addr=%08llx\n", (unsigned long long)addr); 138 } 139 140 return addr; 141 } 142 143 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent, 144 int node, const char *prop_name, int index, fdt_size_t *sizep, 145 bool translate) 146 { 147 int na, ns; 148 149 debug("%s: ", __func__); 150 151 na = fdt_address_cells(blob, parent); 152 if (na < 1) { 153 debug("(bad #address-cells)\n"); 154 return FDT_ADDR_T_NONE; 155 } 156 157 ns = fdt_size_cells(blob, parent); 158 if (ns < 0) { 159 debug("(bad #size-cells)\n"); 160 return FDT_ADDR_T_NONE; 161 } 162 163 debug("na=%d, ns=%d, ", na, ns); 164 165 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na, 166 ns, sizep, translate); 167 } 168 169 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node, 170 const char *prop_name, int index, fdt_size_t *sizep, 171 bool translate) 172 { 173 int parent; 174 175 debug("%s: ", __func__); 176 177 parent = fdt_parent_offset(blob, node); 178 if (parent < 0) { 179 debug("(no parent found)\n"); 180 return FDT_ADDR_T_NONE; 181 } 182 183 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name, 184 index, sizep, translate); 185 } 186 187 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 188 const char *prop_name, fdt_size_t *sizep) 189 { 190 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0; 191 192 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0, 193 sizeof(fdt_addr_t) / sizeof(fdt32_t), 194 ns, sizep, false); 195 } 196 197 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 198 const char *prop_name) 199 { 200 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 201 } 202 203 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI) 204 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 205 const char *prop_name, struct fdt_pci_addr *addr) 206 { 207 const u32 *cell; 208 int len; 209 int ret = -ENOENT; 210 211 debug("%s: %s: ", __func__, prop_name); 212 213 /* 214 * If we follow the pci bus bindings strictly, we should check 215 * the value of the node's parent node's #address-cells and 216 * #size-cells. They need to be 3 and 2 accordingly. However, 217 * for simplicity we skip the check here. 218 */ 219 cell = fdt_getprop(blob, node, prop_name, &len); 220 if (!cell) 221 goto fail; 222 223 if ((len % FDT_PCI_REG_SIZE) == 0) { 224 int num = len / FDT_PCI_REG_SIZE; 225 int i; 226 227 for (i = 0; i < num; i++) { 228 debug("pci address #%d: %08lx %08lx %08lx\n", i, 229 (ulong)fdt32_to_cpu(cell[0]), 230 (ulong)fdt32_to_cpu(cell[1]), 231 (ulong)fdt32_to_cpu(cell[2])); 232 if ((fdt32_to_cpu(*cell) & type) == type) { 233 addr->phys_hi = fdt32_to_cpu(cell[0]); 234 addr->phys_mid = fdt32_to_cpu(cell[1]); 235 addr->phys_lo = fdt32_to_cpu(cell[1]); 236 break; 237 } else { 238 cell += (FDT_PCI_ADDR_CELLS + 239 FDT_PCI_SIZE_CELLS); 240 } 241 } 242 243 if (i == num) { 244 ret = -ENXIO; 245 goto fail; 246 } 247 248 return 0; 249 } else { 250 ret = -EINVAL; 251 } 252 253 fail: 254 debug("(not found)\n"); 255 return ret; 256 } 257 258 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 259 { 260 const char *list, *end; 261 int len; 262 263 list = fdt_getprop(blob, node, "compatible", &len); 264 if (!list) 265 return -ENOENT; 266 267 end = list + len; 268 while (list < end) { 269 char *s; 270 271 len = strlen(list); 272 if (len >= strlen("pciVVVV,DDDD")) { 273 s = strstr(list, "pci"); 274 275 /* 276 * check if the string is something like pciVVVV,DDDD.RR 277 * or just pciVVVV,DDDD 278 */ 279 if (s && s[7] == ',' && 280 (s[12] == '.' || s[12] == 0)) { 281 s += 3; 282 *vendor = simple_strtol(s, NULL, 16); 283 284 s += 5; 285 *device = simple_strtol(s, NULL, 16); 286 287 return 0; 288 } 289 } 290 list += (len + 1); 291 } 292 293 return -ENOENT; 294 } 295 296 int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr, 297 u32 *bar) 298 { 299 int barnum; 300 301 /* extract the bar number from fdt_pci_addr */ 302 barnum = addr->phys_hi & 0xff; 303 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) 304 return -EINVAL; 305 306 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; 307 *bar = dm_pci_read_bar32(dev, barnum); 308 309 return 0; 310 } 311 #endif 312 313 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 314 uint64_t default_val) 315 { 316 const uint64_t *cell64; 317 int length; 318 319 cell64 = fdt_getprop(blob, node, prop_name, &length); 320 if (!cell64 || length < sizeof(*cell64)) 321 return default_val; 322 323 return fdt64_to_cpu(*cell64); 324 } 325 326 int fdtdec_get_is_enabled(const void *blob, int node) 327 { 328 const char *cell; 329 330 /* 331 * It should say "okay", so only allow that. Some fdts use "ok" but 332 * this is a bug. Please fix your device tree source file. See here 333 * for discussion: 334 * 335 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 336 */ 337 cell = fdt_getprop(blob, node, "status", NULL); 338 if (cell) 339 return 0 == strcmp(cell, "okay"); 340 return 1; 341 } 342 343 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 344 { 345 enum fdt_compat_id id; 346 347 /* Search our drivers */ 348 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 349 if (0 == fdt_node_check_compatible(blob, node, 350 compat_names[id])) 351 return id; 352 return COMPAT_UNKNOWN; 353 } 354 355 int fdtdec_next_compatible(const void *blob, int node, 356 enum fdt_compat_id id) 357 { 358 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 359 } 360 361 int fdtdec_next_compatible_subnode(const void *blob, int node, 362 enum fdt_compat_id id, int *depthp) 363 { 364 do { 365 node = fdt_next_node(blob, node, depthp); 366 } while (*depthp > 1); 367 368 /* If this is a direct subnode, and compatible, return it */ 369 if (*depthp == 1 && 0 == fdt_node_check_compatible( 370 blob, node, compat_names[id])) 371 return node; 372 373 return -FDT_ERR_NOTFOUND; 374 } 375 376 int fdtdec_next_alias(const void *blob, const char *name, 377 enum fdt_compat_id id, int *upto) 378 { 379 #define MAX_STR_LEN 20 380 char str[MAX_STR_LEN + 20]; 381 int node, err; 382 383 /* snprintf() is not available */ 384 assert(strlen(name) < MAX_STR_LEN); 385 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 386 node = fdt_path_offset(blob, str); 387 if (node < 0) 388 return node; 389 err = fdt_node_check_compatible(blob, node, compat_names[id]); 390 if (err < 0) 391 return err; 392 if (err) 393 return -FDT_ERR_NOTFOUND; 394 (*upto)++; 395 return node; 396 } 397 398 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 399 enum fdt_compat_id id, int *node_list, int maxcount) 400 { 401 memset(node_list, '\0', sizeof(*node_list) * maxcount); 402 403 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 404 } 405 406 /* TODO: Can we tighten this code up a little? */ 407 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 408 enum fdt_compat_id id, int *node_list, int maxcount) 409 { 410 int name_len = strlen(name); 411 int nodes[maxcount]; 412 int num_found = 0; 413 int offset, node; 414 int alias_node; 415 int count; 416 int i, j; 417 418 /* find the alias node if present */ 419 alias_node = fdt_path_offset(blob, "/aliases"); 420 421 /* 422 * start with nothing, and we can assume that the root node can't 423 * match 424 */ 425 memset(nodes, '\0', sizeof(nodes)); 426 427 /* First find all the compatible nodes */ 428 for (node = count = 0; node >= 0 && count < maxcount;) { 429 node = fdtdec_next_compatible(blob, node, id); 430 if (node >= 0) 431 nodes[count++] = node; 432 } 433 if (node >= 0) 434 debug("%s: warning: maxcount exceeded with alias '%s'\n", 435 __func__, name); 436 437 /* Now find all the aliases */ 438 for (offset = fdt_first_property_offset(blob, alias_node); 439 offset > 0; 440 offset = fdt_next_property_offset(blob, offset)) { 441 const struct fdt_property *prop; 442 const char *path; 443 int number; 444 int found; 445 446 node = 0; 447 prop = fdt_get_property_by_offset(blob, offset, NULL); 448 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 449 if (prop->len && 0 == strncmp(path, name, name_len)) 450 node = fdt_path_offset(blob, prop->data); 451 if (node <= 0) 452 continue; 453 454 /* Get the alias number */ 455 number = simple_strtoul(path + name_len, NULL, 10); 456 if (number < 0 || number >= maxcount) { 457 debug("%s: warning: alias '%s' is out of range\n", 458 __func__, path); 459 continue; 460 } 461 462 /* Make sure the node we found is actually in our list! */ 463 found = -1; 464 for (j = 0; j < count; j++) 465 if (nodes[j] == node) { 466 found = j; 467 break; 468 } 469 470 if (found == -1) { 471 debug("%s: warning: alias '%s' points to a node " 472 "'%s' that is missing or is not compatible " 473 " with '%s'\n", __func__, path, 474 fdt_get_name(blob, node, NULL), 475 compat_names[id]); 476 continue; 477 } 478 479 /* 480 * Add this node to our list in the right place, and mark 481 * it as done. 482 */ 483 if (fdtdec_get_is_enabled(blob, node)) { 484 if (node_list[number]) { 485 debug("%s: warning: alias '%s' requires that " 486 "a node be placed in the list in a " 487 "position which is already filled by " 488 "node '%s'\n", __func__, path, 489 fdt_get_name(blob, node, NULL)); 490 continue; 491 } 492 node_list[number] = node; 493 if (number >= num_found) 494 num_found = number + 1; 495 } 496 nodes[found] = 0; 497 } 498 499 /* Add any nodes not mentioned by an alias */ 500 for (i = j = 0; i < maxcount; i++) { 501 if (!node_list[i]) { 502 for (; j < maxcount; j++) 503 if (nodes[j] && 504 fdtdec_get_is_enabled(blob, nodes[j])) 505 break; 506 507 /* Have we run out of nodes to add? */ 508 if (j == maxcount) 509 break; 510 511 assert(!node_list[i]); 512 node_list[i] = nodes[j++]; 513 if (i >= num_found) 514 num_found = i + 1; 515 } 516 } 517 518 return num_found; 519 } 520 521 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 522 int *seqp) 523 { 524 int base_len = strlen(base); 525 const char *find_name; 526 int find_namelen; 527 int prop_offset; 528 int aliases; 529 530 find_name = fdt_get_name(blob, offset, &find_namelen); 531 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 532 533 aliases = fdt_path_offset(blob, "/aliases"); 534 for (prop_offset = fdt_first_property_offset(blob, aliases); 535 prop_offset > 0; 536 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 537 const char *prop; 538 const char *name; 539 const char *slash; 540 int len, val; 541 542 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 543 debug(" - %s, %s\n", name, prop); 544 if (len < find_namelen || *prop != '/' || prop[len - 1] || 545 strncmp(name, base, base_len)) 546 continue; 547 548 slash = strrchr(prop, '/'); 549 if (strcmp(slash + 1, find_name)) 550 continue; 551 val = trailing_strtol(name); 552 if (val != -1) { 553 *seqp = val; 554 debug("Found seq %d\n", *seqp); 555 return 0; 556 } 557 } 558 559 debug("Not found\n"); 560 return -ENOENT; 561 } 562 563 const char *fdtdec_get_chosen_prop(const void *blob, const char *name) 564 { 565 int chosen_node; 566 567 if (!blob) 568 return NULL; 569 chosen_node = fdt_path_offset(blob, "/chosen"); 570 return fdt_getprop(blob, chosen_node, name, NULL); 571 } 572 573 int fdtdec_get_chosen_node(const void *blob, const char *name) 574 { 575 const char *prop; 576 577 prop = fdtdec_get_chosen_prop(blob, name); 578 if (!prop) 579 return -FDT_ERR_NOTFOUND; 580 return fdt_path_offset(blob, prop); 581 } 582 583 int fdtdec_check_fdt(void) 584 { 585 /* 586 * We must have an FDT, but we cannot panic() yet since the console 587 * is not ready. So for now, just assert(). Boards which need an early 588 * FDT (prior to console ready) will need to make their own 589 * arrangements and do their own checks. 590 */ 591 assert(!fdtdec_prepare_fdt()); 592 return 0; 593 } 594 595 /* 596 * This function is a little odd in that it accesses global data. At some 597 * point if the architecture board.c files merge this will make more sense. 598 * Even now, it is common code. 599 */ 600 int fdtdec_prepare_fdt(void) 601 { 602 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 603 fdt_check_header(gd->fdt_blob)) { 604 #ifdef CONFIG_SPL_BUILD 605 puts("Missing DTB\n"); 606 #else 607 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"); 608 # ifdef DEBUG 609 if (gd->fdt_blob) { 610 printf("fdt_blob=%p\n", gd->fdt_blob); 611 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4, 612 32, 0); 613 } 614 # endif 615 #endif 616 return -1; 617 } 618 return 0; 619 } 620 621 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 622 { 623 const u32 *phandle; 624 int lookup; 625 626 debug("%s: %s\n", __func__, prop_name); 627 phandle = fdt_getprop(blob, node, prop_name, NULL); 628 if (!phandle) 629 return -FDT_ERR_NOTFOUND; 630 631 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 632 return lookup; 633 } 634 635 /** 636 * Look up a property in a node and check that it has a minimum length. 637 * 638 * @param blob FDT blob 639 * @param node node to examine 640 * @param prop_name name of property to find 641 * @param min_len minimum property length in bytes 642 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 643 found, or -FDT_ERR_BADLAYOUT if not enough data 644 * @return pointer to cell, which is only valid if err == 0 645 */ 646 static const void *get_prop_check_min_len(const void *blob, int node, 647 const char *prop_name, int min_len, int *err) 648 { 649 const void *cell; 650 int len; 651 652 debug("%s: %s\n", __func__, prop_name); 653 cell = fdt_getprop(blob, node, prop_name, &len); 654 if (!cell) 655 *err = -FDT_ERR_NOTFOUND; 656 else if (len < min_len) 657 *err = -FDT_ERR_BADLAYOUT; 658 else 659 *err = 0; 660 return cell; 661 } 662 663 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 664 u32 *array, int count) 665 { 666 const u32 *cell; 667 int i, err = 0; 668 669 debug("%s: %s\n", __func__, prop_name); 670 cell = get_prop_check_min_len(blob, node, prop_name, 671 sizeof(u32) * count, &err); 672 if (!err) { 673 for (i = 0; i < count; i++) 674 array[i] = fdt32_to_cpu(cell[i]); 675 } 676 return err; 677 } 678 679 int fdtdec_get_int_array_count(const void *blob, int node, 680 const char *prop_name, u32 *array, int count) 681 { 682 const u32 *cell; 683 int len, elems; 684 int i; 685 686 debug("%s: %s\n", __func__, prop_name); 687 cell = fdt_getprop(blob, node, prop_name, &len); 688 if (!cell) 689 return -FDT_ERR_NOTFOUND; 690 elems = len / sizeof(u32); 691 if (count > elems) 692 count = elems; 693 for (i = 0; i < count; i++) 694 array[i] = fdt32_to_cpu(cell[i]); 695 696 return count; 697 } 698 699 const u32 *fdtdec_locate_array(const void *blob, int node, 700 const char *prop_name, int count) 701 { 702 const u32 *cell; 703 int err; 704 705 cell = get_prop_check_min_len(blob, node, prop_name, 706 sizeof(u32) * count, &err); 707 return err ? NULL : cell; 708 } 709 710 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 711 { 712 const s32 *cell; 713 int len; 714 715 debug("%s: %s\n", __func__, prop_name); 716 cell = fdt_getprop(blob, node, prop_name, &len); 717 return cell != NULL; 718 } 719 720 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 721 const char *list_name, 722 const char *cells_name, 723 int cell_count, int index, 724 struct fdtdec_phandle_args *out_args) 725 { 726 const __be32 *list, *list_end; 727 int rc = 0, size, cur_index = 0; 728 uint32_t count = 0; 729 int node = -1; 730 int phandle; 731 732 /* Retrieve the phandle list property */ 733 list = fdt_getprop(blob, src_node, list_name, &size); 734 if (!list) 735 return -ENOENT; 736 list_end = list + size / sizeof(*list); 737 738 /* Loop over the phandles until all the requested entry is found */ 739 while (list < list_end) { 740 rc = -EINVAL; 741 count = 0; 742 743 /* 744 * If phandle is 0, then it is an empty entry with no 745 * arguments. Skip forward to the next entry. 746 */ 747 phandle = be32_to_cpup(list++); 748 if (phandle) { 749 /* 750 * Find the provider node and parse the #*-cells 751 * property to determine the argument length. 752 * 753 * This is not needed if the cell count is hard-coded 754 * (i.e. cells_name not set, but cell_count is set), 755 * except when we're going to return the found node 756 * below. 757 */ 758 if (cells_name || cur_index == index) { 759 node = fdt_node_offset_by_phandle(blob, 760 phandle); 761 if (!node) { 762 debug("%s: could not find phandle\n", 763 fdt_get_name(blob, src_node, 764 NULL)); 765 goto err; 766 } 767 } 768 769 if (cells_name) { 770 count = fdtdec_get_int(blob, node, cells_name, 771 -1); 772 if (count == -1) { 773 debug("%s: could not get %s for %s\n", 774 fdt_get_name(blob, src_node, 775 NULL), 776 cells_name, 777 fdt_get_name(blob, node, 778 NULL)); 779 goto err; 780 } 781 } else { 782 count = cell_count; 783 } 784 785 /* 786 * Make sure that the arguments actually fit in the 787 * remaining property data length 788 */ 789 if (list + count > list_end) { 790 debug("%s: arguments longer than property\n", 791 fdt_get_name(blob, src_node, NULL)); 792 goto err; 793 } 794 } 795 796 /* 797 * All of the error cases above bail out of the loop, so at 798 * this point, the parsing is successful. If the requested 799 * index matches, then fill the out_args structure and return, 800 * or return -ENOENT for an empty entry. 801 */ 802 rc = -ENOENT; 803 if (cur_index == index) { 804 if (!phandle) 805 goto err; 806 807 if (out_args) { 808 int i; 809 810 if (count > MAX_PHANDLE_ARGS) { 811 debug("%s: too many arguments %d\n", 812 fdt_get_name(blob, src_node, 813 NULL), count); 814 count = MAX_PHANDLE_ARGS; 815 } 816 out_args->node = node; 817 out_args->args_count = count; 818 for (i = 0; i < count; i++) { 819 out_args->args[i] = 820 be32_to_cpup(list++); 821 } 822 } 823 824 /* Found it! return success */ 825 return 0; 826 } 827 828 node = -1; 829 list += count; 830 cur_index++; 831 } 832 833 /* 834 * Result will be one of: 835 * -ENOENT : index is for empty phandle 836 * -EINVAL : parsing error on data 837 * [1..n] : Number of phandle (count mode; when index = -1) 838 */ 839 rc = index < 0 ? cur_index : -ENOENT; 840 err: 841 return rc; 842 } 843 844 int fdtdec_get_child_count(const void *blob, int node) 845 { 846 int subnode; 847 int num = 0; 848 849 fdt_for_each_subnode(subnode, blob, node) 850 num++; 851 852 return num; 853 } 854 855 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 856 u8 *array, int count) 857 { 858 const u8 *cell; 859 int err; 860 861 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 862 if (!err) 863 memcpy(array, cell, count); 864 return err; 865 } 866 867 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 868 const char *prop_name, int count) 869 { 870 const u8 *cell; 871 int err; 872 873 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 874 if (err) 875 return NULL; 876 return cell; 877 } 878 879 int fdtdec_get_config_int(const void *blob, const char *prop_name, 880 int default_val) 881 { 882 int config_node; 883 884 debug("%s: %s\n", __func__, prop_name); 885 config_node = fdt_path_offset(blob, "/config"); 886 if (config_node < 0) 887 return default_val; 888 return fdtdec_get_int(blob, config_node, prop_name, default_val); 889 } 890 891 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 892 { 893 int config_node; 894 const void *prop; 895 896 debug("%s: %s\n", __func__, prop_name); 897 config_node = fdt_path_offset(blob, "/config"); 898 if (config_node < 0) 899 return 0; 900 prop = fdt_get_property(blob, config_node, prop_name, NULL); 901 902 return prop != NULL; 903 } 904 905 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 906 { 907 const char *nodep; 908 int nodeoffset; 909 int len; 910 911 debug("%s: %s\n", __func__, prop_name); 912 nodeoffset = fdt_path_offset(blob, "/config"); 913 if (nodeoffset < 0) 914 return NULL; 915 916 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 917 if (!nodep) 918 return NULL; 919 920 return (char *)nodep; 921 } 922 923 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 924 fdt_addr_t *basep, fdt_size_t *sizep) 925 { 926 const fdt_addr_t *cell; 927 int len; 928 929 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 930 prop_name); 931 cell = fdt_getprop(blob, node, prop_name, &len); 932 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 933 debug("cell=%p, len=%d\n", cell, len); 934 return -1; 935 } 936 937 *basep = fdt_addr_to_cpu(*cell); 938 *sizep = fdt_size_to_cpu(cell[1]); 939 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 940 (ulong)*sizep); 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_stringlist_search(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 ret; 1153 } 1154 1155 int fdtdec_setup_memory_size(void) 1156 { 1157 int ret, mem; 1158 struct fdt_resource res; 1159 1160 mem = fdt_path_offset(gd->fdt_blob, "/memory"); 1161 if (mem < 0) { 1162 debug("%s: Missing /memory node\n", __func__); 1163 return -EINVAL; 1164 } 1165 1166 ret = fdt_get_resource(gd->fdt_blob, mem, "reg", 0, &res); 1167 if (ret != 0) { 1168 debug("%s: Unable to decode first memory bank\n", __func__); 1169 return -EINVAL; 1170 } 1171 1172 gd->ram_size = (phys_size_t)(res.end - res.start + 1); 1173 debug("%s: Initial DRAM size %llx\n", __func__, 1174 (unsigned long long)gd->ram_size); 1175 1176 return 0; 1177 } 1178 1179 #if defined(CONFIG_NR_DRAM_BANKS) 1180 int fdtdec_setup_memory_banksize(void) 1181 { 1182 int bank, ret, mem; 1183 struct fdt_resource res; 1184 1185 mem = fdt_path_offset(gd->fdt_blob, "/memory"); 1186 if (mem < 0) { 1187 debug("%s: Missing /memory node\n", __func__); 1188 return -EINVAL; 1189 } 1190 1191 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) { 1192 ret = fdt_get_resource(gd->fdt_blob, mem, "reg", bank, &res); 1193 if (ret == -FDT_ERR_NOTFOUND) 1194 break; 1195 if (ret != 0) 1196 return -EINVAL; 1197 1198 gd->bd->bi_dram[bank].start = (phys_addr_t)res.start; 1199 gd->bd->bi_dram[bank].size = 1200 (phys_size_t)(res.end - res.start + 1); 1201 1202 debug("%s: DRAM Bank #%d: start = 0x%llx, size = 0x%llx\n", 1203 __func__, bank, 1204 (unsigned long long)gd->bd->bi_dram[bank].start, 1205 (unsigned long long)gd->bd->bi_dram[bank].size); 1206 } 1207 1208 return 0; 1209 } 1210 #endif 1211 1212 int fdtdec_setup(void) 1213 { 1214 #if CONFIG_IS_ENABLED(OF_CONTROL) 1215 # ifdef CONFIG_OF_EMBED 1216 /* Get a pointer to the FDT */ 1217 gd->fdt_blob = __dtb_dt_begin; 1218 # elif defined CONFIG_OF_SEPARATE 1219 # ifdef CONFIG_SPL_BUILD 1220 /* FDT is at end of BSS unless it is in a different memory region */ 1221 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS)) 1222 gd->fdt_blob = (ulong *)&_image_binary_end; 1223 else 1224 gd->fdt_blob = (ulong *)&__bss_end; 1225 1226 # elif defined CONFIG_FIT_EMBED 1227 gd->fdt_blob = locate_dtb_in_fit(&_end); 1228 1229 if (gd->fdt_blob == NULL || gd->fdt_blob <= ((void *)&_end)) { 1230 puts("Failed to find proper dtb in embedded FIT Image\n"); 1231 return -1; 1232 } 1233 1234 # else 1235 /* FDT is at end of image */ 1236 gd->fdt_blob = (ulong *)&_end; 1237 # endif 1238 # elif defined(CONFIG_OF_BOARD) 1239 /* Allow the board to override the fdt address. */ 1240 gd->fdt_blob = board_fdt_blob_setup(); 1241 # elif defined(CONFIG_OF_HOSTFILE) 1242 if (sandbox_read_fdt_from_file()) { 1243 puts("Failed to read control FDT\n"); 1244 return -1; 1245 } 1246 # endif 1247 # ifndef CONFIG_SPL_BUILD 1248 /* Allow the early environment to override the fdt address */ 1249 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, 1250 (uintptr_t)gd->fdt_blob); 1251 # endif 1252 #endif 1253 return fdtdec_prepare_fdt(); 1254 } 1255 1256 #endif /* !USE_HOSTCC */ 1257