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 <boot_fit.h> 9 #include <dm.h> 10 #include <dm/of_extra.h> 11 #include <errno.h> 12 #include <fdtdec.h> 13 #include <fdt_support.h> 14 #include <linux/libfdt.h> 15 #include <serial.h> 16 #include <asm/sections.h> 17 #include <linux/ctype.h> 18 #include <linux/lzo.h> 19 20 DECLARE_GLOBAL_DATA_PTR; 21 22 /* 23 * Here are the type we know about. One day we might allow drivers to 24 * register. For now we just put them here. The COMPAT macro allows us to 25 * turn this into a sparse list later, and keeps the ID with the name. 26 * 27 * NOTE: This list is basically a TODO list for things that need to be 28 * converted to driver model. So don't add new things here unless there is a 29 * good reason why driver-model conversion is infeasible. Examples include 30 * things which are used before driver model is available. 31 */ 32 #define COMPAT(id, name) name 33 static const char * const compat_names[COMPAT_COUNT] = { 34 COMPAT(UNKNOWN, "<none>"), 35 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"), 36 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"), 37 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"), 38 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"), 39 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"), 40 COMPAT(SMSC_LAN9215, "smsc,lan9215"), 41 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), 42 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), 43 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), 44 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), 45 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), 46 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"), 47 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), 48 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"), 49 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), 50 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), 51 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"), 52 COMPAT(GENERIC_SPI_FLASH, "spi-flash"), 53 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), 54 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), 55 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), 56 COMPAT(INTEL_MICROCODE, "intel,microcode"), 57 COMPAT(AMS_AS3722, "ams,as3722"), 58 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"), 59 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"), 60 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"), 61 COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"), 62 COMPAT(INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"), 63 COMPAT(INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"), 64 COMPAT(INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"), 65 COMPAT(COMPAT_SUNXI_NAND, "allwinner,sun4i-a10-nand"), 66 COMPAT(ALTERA_SOCFPGA_CLK, "altr,clk-mgr"), 67 COMPAT(ALTERA_SOCFPGA_PINCTRL_SINGLE, "pinctrl-single"), 68 COMPAT(ALTERA_SOCFPGA_H2F_BRG, "altr,socfpga-hps2fpga-bridge"), 69 COMPAT(ALTERA_SOCFPGA_LWH2F_BRG, "altr,socfpga-lwhps2fpga-bridge"), 70 COMPAT(ALTERA_SOCFPGA_F2H_BRG, "altr,socfpga-fpga2hps-bridge"), 71 COMPAT(ALTERA_SOCFPGA_F2SDR0, "altr,socfpga-fpga2sdram0-bridge"), 72 COMPAT(ALTERA_SOCFPGA_F2SDR1, "altr,socfpga-fpga2sdram1-bridge"), 73 COMPAT(ALTERA_SOCFPGA_F2SDR2, "altr,socfpga-fpga2sdram2-bridge"), 74 COMPAT(ALTERA_SOCFPGA_FPGA0, "altr,socfpga-a10-fpga-mgr"), 75 COMPAT(ALTERA_SOCFPGA_NOC, "altr,socfpga-a10-noc"), 76 }; 77 78 const char *fdtdec_get_compatible(enum fdt_compat_id id) 79 { 80 /* We allow reading of the 'unknown' ID for testing purposes */ 81 assert(id >= 0 && id < COMPAT_COUNT); 82 return compat_names[id]; 83 } 84 85 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node, 86 const char *prop_name, int index, int na, 87 int ns, fdt_size_t *sizep, 88 bool translate) 89 { 90 const fdt32_t *prop, *prop_end; 91 const fdt32_t *prop_addr, *prop_size, *prop_after_size; 92 int len; 93 fdt_addr_t addr; 94 95 debug("%s: %s: ", __func__, prop_name); 96 97 if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) { 98 debug("(na too large for fdt_addr_t type)\n"); 99 return FDT_ADDR_T_NONE; 100 } 101 102 if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) { 103 debug("(ns too large for fdt_size_t type)\n"); 104 return FDT_ADDR_T_NONE; 105 } 106 107 prop = fdt_getprop(blob, node, prop_name, &len); 108 if (!prop) { 109 debug("(not found)\n"); 110 return FDT_ADDR_T_NONE; 111 } 112 prop_end = prop + (len / sizeof(*prop)); 113 114 prop_addr = prop + (index * (na + ns)); 115 prop_size = prop_addr + na; 116 prop_after_size = prop_size + ns; 117 if (prop_after_size > prop_end) { 118 debug("(not enough data: expected >= %d cells, got %d cells)\n", 119 (u32)(prop_after_size - prop), ((u32)(prop_end - prop))); 120 return FDT_ADDR_T_NONE; 121 } 122 123 #if CONFIG_IS_ENABLED(OF_TRANSLATE) 124 if (translate) 125 addr = fdt_translate_address(blob, node, prop_addr); 126 else 127 #endif 128 addr = fdtdec_get_number(prop_addr, na); 129 130 if (sizep) { 131 *sizep = fdtdec_get_number(prop_size, ns); 132 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr, 133 (unsigned long long)*sizep); 134 } else { 135 debug("addr=%08llx\n", (unsigned long long)addr); 136 } 137 138 return addr; 139 } 140 141 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent, 142 int node, const char *prop_name, 143 int index, fdt_size_t *sizep, 144 bool translate) 145 { 146 int na, ns; 147 148 debug("%s: ", __func__); 149 150 na = fdt_address_cells(blob, parent); 151 if (na < 1) { 152 debug("(bad #address-cells)\n"); 153 return FDT_ADDR_T_NONE; 154 } 155 156 ns = fdt_size_cells(blob, parent); 157 if (ns < 0) { 158 debug("(bad #size-cells)\n"); 159 return FDT_ADDR_T_NONE; 160 } 161 162 debug("na=%d, ns=%d, ", na, ns); 163 164 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na, 165 ns, sizep, translate); 166 } 167 168 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node, 169 const char *prop_name, int index, 170 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, const char *prop_name) 198 { 199 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 200 } 201 202 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI) 203 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 204 const char *prop_name, struct fdt_pci_addr *addr) 205 { 206 const u32 *cell; 207 int len; 208 int ret = -ENOENT; 209 210 debug("%s: %s: ", __func__, prop_name); 211 212 /* 213 * If we follow the pci bus bindings strictly, we should check 214 * the value of the node's parent node's #address-cells and 215 * #size-cells. They need to be 3 and 2 accordingly. However, 216 * for simplicity we skip the check here. 217 */ 218 cell = fdt_getprop(blob, node, prop_name, &len); 219 if (!cell) 220 goto fail; 221 222 if ((len % FDT_PCI_REG_SIZE) == 0) { 223 int num = len / FDT_PCI_REG_SIZE; 224 int i; 225 226 for (i = 0; i < num; i++) { 227 debug("pci address #%d: %08lx %08lx %08lx\n", i, 228 (ulong)fdt32_to_cpu(cell[0]), 229 (ulong)fdt32_to_cpu(cell[1]), 230 (ulong)fdt32_to_cpu(cell[2])); 231 if ((fdt32_to_cpu(*cell) & type) == type) { 232 addr->phys_hi = fdt32_to_cpu(cell[0]); 233 addr->phys_mid = fdt32_to_cpu(cell[1]); 234 addr->phys_lo = fdt32_to_cpu(cell[1]); 235 break; 236 } 237 238 cell += (FDT_PCI_ADDR_CELLS + 239 FDT_PCI_SIZE_CELLS); 240 } 241 242 if (i == num) { 243 ret = -ENXIO; 244 goto fail; 245 } 246 247 return 0; 248 } 249 250 ret = -EINVAL; 251 252 fail: 253 debug("(not found)\n"); 254 return ret; 255 } 256 257 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 258 { 259 const char *list, *end; 260 int len; 261 262 list = fdt_getprop(blob, node, "compatible", &len); 263 if (!list) 264 return -ENOENT; 265 266 end = list + len; 267 while (list < end) { 268 len = strlen(list); 269 if (len >= strlen("pciVVVV,DDDD")) { 270 char *s = strstr(list, "pci"); 271 272 /* 273 * check if the string is something like pciVVVV,DDDD.RR 274 * or just pciVVVV,DDDD 275 */ 276 if (s && s[7] == ',' && 277 (s[12] == '.' || s[12] == 0)) { 278 s += 3; 279 *vendor = simple_strtol(s, NULL, 16); 280 281 s += 5; 282 *device = simple_strtol(s, NULL, 16); 283 284 return 0; 285 } 286 } 287 list += (len + 1); 288 } 289 290 return -ENOENT; 291 } 292 293 int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr, 294 u32 *bar) 295 { 296 int barnum; 297 298 /* extract the bar number from fdt_pci_addr */ 299 barnum = addr->phys_hi & 0xff; 300 if (barnum < PCI_BASE_ADDRESS_0 || barnum > PCI_CARDBUS_CIS) 301 return -EINVAL; 302 303 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; 304 *bar = dm_pci_read_bar32(dev, barnum); 305 306 return 0; 307 } 308 #endif 309 310 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 311 uint64_t default_val) 312 { 313 const uint64_t *cell64; 314 int length; 315 316 cell64 = fdt_getprop(blob, node, prop_name, &length); 317 if (!cell64 || length < sizeof(*cell64)) 318 return default_val; 319 320 return fdt64_to_cpu(*cell64); 321 } 322 323 int fdtdec_get_is_enabled(const void *blob, int node) 324 { 325 const char *cell; 326 327 /* 328 * It should say "okay", so only allow that. Some fdts use "ok" but 329 * this is a bug. Please fix your device tree source file. See here 330 * for discussion: 331 * 332 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 333 */ 334 cell = fdt_getprop(blob, node, "status", NULL); 335 if (cell) 336 return strcmp(cell, "okay") == 0; 337 return 1; 338 } 339 340 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 341 { 342 enum fdt_compat_id id; 343 344 /* Search our drivers */ 345 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 346 if (fdt_node_check_compatible(blob, node, 347 compat_names[id]) == 0) 348 return id; 349 return COMPAT_UNKNOWN; 350 } 351 352 int fdtdec_next_compatible(const void *blob, int node, enum fdt_compat_id id) 353 { 354 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 355 } 356 357 int fdtdec_next_compatible_subnode(const void *blob, int node, 358 enum fdt_compat_id id, int *depthp) 359 { 360 do { 361 node = fdt_next_node(blob, node, depthp); 362 } while (*depthp > 1); 363 364 /* If this is a direct subnode, and compatible, return it */ 365 if (*depthp == 1 && 0 == fdt_node_check_compatible( 366 blob, node, compat_names[id])) 367 return node; 368 369 return -FDT_ERR_NOTFOUND; 370 } 371 372 int fdtdec_next_alias(const void *blob, const char *name, enum fdt_compat_id id, 373 int *upto) 374 { 375 #define MAX_STR_LEN 20 376 char str[MAX_STR_LEN + 20]; 377 int node, err; 378 379 /* snprintf() is not available */ 380 assert(strlen(name) < MAX_STR_LEN); 381 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 382 node = fdt_path_offset(blob, str); 383 if (node < 0) 384 return node; 385 err = fdt_node_check_compatible(blob, node, compat_names[id]); 386 if (err < 0) 387 return err; 388 if (err) 389 return -FDT_ERR_NOTFOUND; 390 (*upto)++; 391 return node; 392 } 393 394 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 395 enum fdt_compat_id id, int *node_list, 396 int maxcount) 397 { 398 memset(node_list, '\0', sizeof(*node_list) * maxcount); 399 400 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 401 } 402 403 /* TODO: Can we tighten this code up a little? */ 404 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 405 enum fdt_compat_id id, int *node_list, 406 int maxcount) 407 { 408 int name_len = strlen(name); 409 int nodes[maxcount]; 410 int num_found = 0; 411 int offset, node; 412 int alias_node; 413 int count; 414 int i, j; 415 416 /* find the alias node if present */ 417 alias_node = fdt_path_offset(blob, "/aliases"); 418 419 /* 420 * start with nothing, and we can assume that the root node can't 421 * match 422 */ 423 memset(nodes, '\0', sizeof(nodes)); 424 425 /* First find all the compatible nodes */ 426 for (node = count = 0; node >= 0 && count < maxcount;) { 427 node = fdtdec_next_compatible(blob, node, id); 428 if (node >= 0) 429 nodes[count++] = node; 430 } 431 if (node >= 0) 432 debug("%s: warning: maxcount exceeded with alias '%s'\n", 433 __func__, name); 434 435 /* Now find all the aliases */ 436 for (offset = fdt_first_property_offset(blob, alias_node); 437 offset > 0; 438 offset = fdt_next_property_offset(blob, offset)) { 439 const struct fdt_property *prop; 440 const char *path; 441 int number; 442 int found; 443 444 node = 0; 445 prop = fdt_get_property_by_offset(blob, offset, NULL); 446 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 447 if (prop->len && 0 == strncmp(path, name, name_len)) 448 node = fdt_path_offset(blob, prop->data); 449 if (node <= 0) 450 continue; 451 452 /* Get the alias number */ 453 number = simple_strtoul(path + name_len, NULL, 10); 454 if (number < 0 || number >= maxcount) { 455 debug("%s: warning: alias '%s' is out of range\n", 456 __func__, path); 457 continue; 458 } 459 460 /* Make sure the node we found is actually in our list! */ 461 found = -1; 462 for (j = 0; j < count; j++) 463 if (nodes[j] == node) { 464 found = j; 465 break; 466 } 467 468 if (found == -1) { 469 debug("%s: warning: alias '%s' points to a node " 470 "'%s' that is missing or is not compatible " 471 " with '%s'\n", __func__, path, 472 fdt_get_name(blob, node, NULL), 473 compat_names[id]); 474 continue; 475 } 476 477 /* 478 * Add this node to our list in the right place, and mark 479 * it as done. 480 */ 481 if (fdtdec_get_is_enabled(blob, node)) { 482 if (node_list[number]) { 483 debug("%s: warning: alias '%s' requires that " 484 "a node be placed in the list in a " 485 "position which is already filled by " 486 "node '%s'\n", __func__, path, 487 fdt_get_name(blob, node, NULL)); 488 continue; 489 } 490 node_list[number] = node; 491 if (number >= num_found) 492 num_found = number + 1; 493 } 494 nodes[found] = 0; 495 } 496 497 /* Add any nodes not mentioned by an alias */ 498 for (i = j = 0; i < maxcount; i++) { 499 if (!node_list[i]) { 500 for (; j < maxcount; j++) 501 if (nodes[j] && 502 fdtdec_get_is_enabled(blob, nodes[j])) 503 break; 504 505 /* Have we run out of nodes to add? */ 506 if (j == maxcount) 507 break; 508 509 assert(!node_list[i]); 510 node_list[i] = nodes[j++]; 511 if (i >= num_found) 512 num_found = i + 1; 513 } 514 } 515 516 return num_found; 517 } 518 519 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 520 int *seqp) 521 { 522 int base_len = strlen(base); 523 const char *find_name; 524 int find_namelen; 525 int prop_offset; 526 int aliases; 527 528 find_name = fdt_get_name(blob, offset, &find_namelen); 529 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 530 531 aliases = fdt_path_offset(blob, "/aliases"); 532 for (prop_offset = fdt_first_property_offset(blob, aliases); 533 prop_offset > 0; 534 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 535 const char *prop; 536 const char *name; 537 const char *slash; 538 int len, val; 539 540 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 541 debug(" - %s, %s\n", name, prop); 542 if (len < find_namelen || *prop != '/' || prop[len - 1] || 543 strncmp(name, base, base_len)) 544 continue; 545 546 slash = strrchr(prop, '/'); 547 if (strcmp(slash + 1, find_name)) 548 continue; 549 val = trailing_strtol(name); 550 if (val != -1) { 551 *seqp = val; 552 debug("Found seq %d\n", *seqp); 553 return 0; 554 } 555 } 556 557 debug("Not found\n"); 558 return -ENOENT; 559 } 560 561 const char *fdtdec_get_chosen_prop(const void *blob, const char *name) 562 { 563 int chosen_node; 564 565 if (!blob) 566 return NULL; 567 chosen_node = fdt_path_offset(blob, "/chosen"); 568 return fdt_getprop(blob, chosen_node, name, NULL); 569 } 570 571 int fdtdec_get_chosen_node(const void *blob, const char *name) 572 { 573 const char *prop; 574 575 prop = fdtdec_get_chosen_prop(blob, name); 576 if (!prop) 577 return -FDT_ERR_NOTFOUND; 578 return fdt_path_offset(blob, prop); 579 } 580 581 int fdtdec_check_fdt(void) 582 { 583 /* 584 * We must have an FDT, but we cannot panic() yet since the console 585 * is not ready. So for now, just assert(). Boards which need an early 586 * FDT (prior to console ready) will need to make their own 587 * arrangements and do their own checks. 588 */ 589 assert(!fdtdec_prepare_fdt()); 590 return 0; 591 } 592 593 /* 594 * This function is a little odd in that it accesses global data. At some 595 * point if the architecture board.c files merge this will make more sense. 596 * Even now, it is common code. 597 */ 598 int fdtdec_prepare_fdt(void) 599 { 600 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 601 fdt_check_header(gd->fdt_blob)) { 602 #ifdef CONFIG_SPL_BUILD 603 puts("Missing DTB\n"); 604 #else 605 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"); 606 # ifdef DEBUG 607 if (gd->fdt_blob) { 608 printf("fdt_blob=%p\n", gd->fdt_blob); 609 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4, 610 32, 0); 611 } 612 # endif 613 #endif 614 return -1; 615 } 616 return 0; 617 } 618 619 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 620 { 621 const u32 *phandle; 622 int lookup; 623 624 debug("%s: %s\n", __func__, prop_name); 625 phandle = fdt_getprop(blob, node, prop_name, NULL); 626 if (!phandle) 627 return -FDT_ERR_NOTFOUND; 628 629 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 630 return lookup; 631 } 632 633 /** 634 * Look up a property in a node and check that it has a minimum length. 635 * 636 * @param blob FDT blob 637 * @param node node to examine 638 * @param prop_name name of property to find 639 * @param min_len minimum property length in bytes 640 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 641 found, or -FDT_ERR_BADLAYOUT if not enough data 642 * @return pointer to cell, which is only valid if err == 0 643 */ 644 static const void *get_prop_check_min_len(const void *blob, int node, 645 const char *prop_name, int min_len, 646 int *err) 647 { 648 const void *cell; 649 int len; 650 651 debug("%s: %s\n", __func__, prop_name); 652 cell = fdt_getprop(blob, node, prop_name, &len); 653 if (!cell) 654 *err = -FDT_ERR_NOTFOUND; 655 else if (len < min_len) 656 *err = -FDT_ERR_BADLAYOUT; 657 else 658 *err = 0; 659 return cell; 660 } 661 662 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 663 u32 *array, int count) 664 { 665 const u32 *cell; 666 int err = 0; 667 668 debug("%s: %s\n", __func__, prop_name); 669 cell = get_prop_check_min_len(blob, node, prop_name, 670 sizeof(u32) * count, &err); 671 if (!err) { 672 int i; 673 674 for (i = 0; i < count; i++) 675 array[i] = fdt32_to_cpu(cell[i]); 676 } 677 return err; 678 } 679 680 int fdtdec_get_int_array_count(const void *blob, int node, 681 const char *prop_name, u32 *array, int count) 682 { 683 const u32 *cell; 684 int len, elems; 685 int i; 686 687 debug("%s: %s\n", __func__, prop_name); 688 cell = fdt_getprop(blob, node, prop_name, &len); 689 if (!cell) 690 return -FDT_ERR_NOTFOUND; 691 elems = len / sizeof(u32); 692 if (count > elems) 693 count = elems; 694 for (i = 0; i < count; i++) 695 array[i] = fdt32_to_cpu(cell[i]); 696 697 return count; 698 } 699 700 const u32 *fdtdec_locate_array(const void *blob, int node, 701 const char *prop_name, int count) 702 { 703 const u32 *cell; 704 int err; 705 706 cell = get_prop_check_min_len(blob, node, prop_name, 707 sizeof(u32) * count, &err); 708 return err ? NULL : cell; 709 } 710 711 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 712 { 713 const s32 *cell; 714 int len; 715 716 debug("%s: %s\n", __func__, prop_name); 717 cell = fdt_getprop(blob, node, prop_name, &len); 718 return cell != NULL; 719 } 720 721 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 722 const char *list_name, 723 const char *cells_name, 724 int cell_count, int index, 725 struct fdtdec_phandle_args *out_args) 726 { 727 const __be32 *list, *list_end; 728 int rc = 0, size, cur_index = 0; 729 uint32_t count = 0; 730 int node = -1; 731 int phandle; 732 733 /* Retrieve the phandle list property */ 734 list = fdt_getprop(blob, src_node, list_name, &size); 735 if (!list) 736 return -ENOENT; 737 list_end = list + size / sizeof(*list); 738 739 /* Loop over the phandles until all the requested entry is found */ 740 while (list < list_end) { 741 rc = -EINVAL; 742 count = 0; 743 744 /* 745 * If phandle is 0, then it is an empty entry with no 746 * arguments. Skip forward to the next entry. 747 */ 748 phandle = be32_to_cpup(list++); 749 if (phandle) { 750 /* 751 * Find the provider node and parse the #*-cells 752 * property to determine the argument length. 753 * 754 * This is not needed if the cell count is hard-coded 755 * (i.e. cells_name not set, but cell_count is set), 756 * except when we're going to return the found node 757 * below. 758 */ 759 if (cells_name || cur_index == index) { 760 node = fdt_node_offset_by_phandle(blob, 761 phandle); 762 if (!node) { 763 debug("%s: could not find phandle\n", 764 fdt_get_name(blob, src_node, 765 NULL)); 766 goto err; 767 } 768 } 769 770 if (cells_name) { 771 count = fdtdec_get_int(blob, node, cells_name, 772 -1); 773 if (count == -1) { 774 debug("%s: could not get %s for %s\n", 775 fdt_get_name(blob, src_node, 776 NULL), 777 cells_name, 778 fdt_get_name(blob, node, 779 NULL)); 780 goto err; 781 } 782 } else { 783 count = cell_count; 784 } 785 786 /* 787 * Make sure that the arguments actually fit in the 788 * remaining property data length 789 */ 790 if (list + count > list_end) { 791 debug("%s: arguments longer than property\n", 792 fdt_get_name(blob, src_node, NULL)); 793 goto err; 794 } 795 } 796 797 /* 798 * All of the error cases above bail out of the loop, so at 799 * this point, the parsing is successful. If the requested 800 * index matches, then fill the out_args structure and return, 801 * or return -ENOENT for an empty entry. 802 */ 803 rc = -ENOENT; 804 if (cur_index == index) { 805 if (!phandle) 806 goto err; 807 808 if (out_args) { 809 int i; 810 811 if (count > MAX_PHANDLE_ARGS) { 812 debug("%s: too many arguments %d\n", 813 fdt_get_name(blob, src_node, 814 NULL), count); 815 count = MAX_PHANDLE_ARGS; 816 } 817 out_args->node = node; 818 out_args->args_count = count; 819 for (i = 0; i < count; i++) { 820 out_args->args[i] = 821 be32_to_cpup(list++); 822 } 823 } 824 825 /* Found it! return success */ 826 return 0; 827 } 828 829 node = -1; 830 list += count; 831 cur_index++; 832 } 833 834 /* 835 * Result will be one of: 836 * -ENOENT : index is for empty phandle 837 * -EINVAL : parsing error on data 838 * [1..n] : Number of phandle (count mode; when index = -1) 839 */ 840 rc = index < 0 ? cur_index : -ENOENT; 841 err: 842 return rc; 843 } 844 845 int fdtdec_get_child_count(const void *blob, int node) 846 { 847 int subnode; 848 int num = 0; 849 850 fdt_for_each_subnode(subnode, blob, node) 851 num++; 852 853 return num; 854 } 855 856 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 857 u8 *array, int count) 858 { 859 const u8 *cell; 860 int err; 861 862 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 863 if (!err) 864 memcpy(array, cell, count); 865 return err; 866 } 867 868 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 869 const char *prop_name, int count) 870 { 871 const u8 *cell; 872 int err; 873 874 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 875 if (err) 876 return NULL; 877 return cell; 878 } 879 880 int fdtdec_get_config_int(const void *blob, const char *prop_name, 881 int default_val) 882 { 883 int config_node; 884 885 debug("%s: %s\n", __func__, prop_name); 886 config_node = fdt_path_offset(blob, "/config"); 887 if (config_node < 0) 888 return default_val; 889 return fdtdec_get_int(blob, config_node, prop_name, default_val); 890 } 891 892 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 893 { 894 int config_node; 895 const void *prop; 896 897 debug("%s: %s\n", __func__, prop_name); 898 config_node = fdt_path_offset(blob, "/config"); 899 if (config_node < 0) 900 return 0; 901 prop = fdt_get_property(blob, config_node, prop_name, NULL); 902 903 return prop != NULL; 904 } 905 906 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 907 { 908 const char *nodep; 909 int nodeoffset; 910 int len; 911 912 debug("%s: %s\n", __func__, prop_name); 913 nodeoffset = fdt_path_offset(blob, "/config"); 914 if (nodeoffset < 0) 915 return NULL; 916 917 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 918 if (!nodep) 919 return NULL; 920 921 return (char *)nodep; 922 } 923 924 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 925 fdt_addr_t *basep, fdt_size_t *sizep) 926 { 927 const fdt_addr_t *cell; 928 int len; 929 930 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 931 prop_name); 932 cell = fdt_getprop(blob, node, prop_name, &len); 933 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 934 debug("cell=%p, len=%d\n", cell, len); 935 return -1; 936 } 937 938 *basep = fdt_addr_to_cpu(*cell); 939 *sizep = fdt_size_to_cpu(cell[1]); 940 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 941 (ulong)*sizep); 942 943 return 0; 944 } 945 946 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 947 { 948 u64 number = 0; 949 950 while (cells--) 951 number = (number << 32) | fdt32_to_cpu(*ptr++); 952 953 return number; 954 } 955 956 int fdt_get_resource(const void *fdt, int node, const char *property, 957 unsigned int index, struct fdt_resource *res) 958 { 959 const fdt32_t *ptr, *end; 960 int na, ns, len, parent; 961 unsigned int i = 0; 962 963 parent = fdt_parent_offset(fdt, node); 964 if (parent < 0) 965 return parent; 966 967 na = fdt_address_cells(fdt, parent); 968 ns = fdt_size_cells(fdt, parent); 969 970 ptr = fdt_getprop(fdt, node, property, &len); 971 if (!ptr) 972 return len; 973 974 end = ptr + len / sizeof(*ptr); 975 976 while (ptr + na + ns <= end) { 977 if (i == index) { 978 res->start = fdtdec_get_number(ptr, na); 979 res->end = res->start; 980 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 981 return 0; 982 } 983 984 ptr += na + ns; 985 i++; 986 } 987 988 return -FDT_ERR_NOTFOUND; 989 } 990 991 int fdt_get_named_resource(const void *fdt, int node, const char *property, 992 const char *prop_names, const char *name, 993 struct fdt_resource *res) 994 { 995 int index; 996 997 index = fdt_stringlist_search(fdt, node, prop_names, name); 998 if (index < 0) 999 return index; 1000 1001 return fdt_get_resource(fdt, node, property, index, res); 1002 } 1003 1004 int fdtdec_decode_memory_region(const void *blob, int config_node, 1005 const char *mem_type, const char *suffix, 1006 fdt_addr_t *basep, fdt_size_t *sizep) 1007 { 1008 char prop_name[50]; 1009 const char *mem; 1010 fdt_size_t size, offset_size; 1011 fdt_addr_t base, offset; 1012 int node; 1013 1014 if (config_node == -1) { 1015 config_node = fdt_path_offset(blob, "/config"); 1016 if (config_node < 0) { 1017 debug("%s: Cannot find /config node\n", __func__); 1018 return -ENOENT; 1019 } 1020 } 1021 if (!suffix) 1022 suffix = ""; 1023 1024 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 1025 suffix); 1026 mem = fdt_getprop(blob, config_node, prop_name, NULL); 1027 if (!mem) { 1028 debug("%s: No memory type for '%s', using /memory\n", __func__, 1029 prop_name); 1030 mem = "/memory"; 1031 } 1032 1033 node = fdt_path_offset(blob, mem); 1034 if (node < 0) { 1035 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 1036 fdt_strerror(node)); 1037 return -ENOENT; 1038 } 1039 1040 /* 1041 * Not strictly correct - the memory may have multiple banks. We just 1042 * use the first 1043 */ 1044 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 1045 debug("%s: Failed to decode memory region %s\n", __func__, 1046 mem); 1047 return -EINVAL; 1048 } 1049 1050 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 1051 suffix); 1052 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 1053 &offset_size)) { 1054 debug("%s: Failed to decode memory region '%s'\n", __func__, 1055 prop_name); 1056 return -EINVAL; 1057 } 1058 1059 *basep = base + offset; 1060 *sizep = offset_size; 1061 1062 return 0; 1063 } 1064 1065 static int decode_timing_property(const void *blob, int node, const char *name, 1066 struct timing_entry *result) 1067 { 1068 int length, ret = 0; 1069 const u32 *prop; 1070 1071 prop = fdt_getprop(blob, node, name, &length); 1072 if (!prop) { 1073 debug("%s: could not find property %s\n", 1074 fdt_get_name(blob, node, NULL), name); 1075 return length; 1076 } 1077 1078 if (length == sizeof(u32)) { 1079 result->typ = fdtdec_get_int(blob, node, name, 0); 1080 result->min = result->typ; 1081 result->max = result->typ; 1082 } else { 1083 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3); 1084 } 1085 1086 return ret; 1087 } 1088 1089 int fdtdec_decode_display_timing(const void *blob, int parent, int index, 1090 struct display_timing *dt) 1091 { 1092 int i, node, timings_node; 1093 u32 val = 0; 1094 int ret = 0; 1095 1096 timings_node = fdt_subnode_offset(blob, parent, "display-timings"); 1097 if (timings_node < 0) 1098 return timings_node; 1099 1100 for (i = 0, node = fdt_first_subnode(blob, timings_node); 1101 node > 0 && i != index; 1102 node = fdt_next_subnode(blob, node)) 1103 i++; 1104 1105 if (node < 0) 1106 return node; 1107 1108 memset(dt, 0, sizeof(*dt)); 1109 1110 ret |= decode_timing_property(blob, node, "hback-porch", 1111 &dt->hback_porch); 1112 ret |= decode_timing_property(blob, node, "hfront-porch", 1113 &dt->hfront_porch); 1114 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive); 1115 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len); 1116 ret |= decode_timing_property(blob, node, "vback-porch", 1117 &dt->vback_porch); 1118 ret |= decode_timing_property(blob, node, "vfront-porch", 1119 &dt->vfront_porch); 1120 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive); 1121 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len); 1122 ret |= decode_timing_property(blob, node, "clock-frequency", 1123 &dt->pixelclock); 1124 1125 dt->flags = 0; 1126 val = fdtdec_get_int(blob, node, "vsync-active", -1); 1127 if (val != -1) { 1128 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : 1129 DISPLAY_FLAGS_VSYNC_LOW; 1130 } 1131 val = fdtdec_get_int(blob, node, "hsync-active", -1); 1132 if (val != -1) { 1133 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : 1134 DISPLAY_FLAGS_HSYNC_LOW; 1135 } 1136 val = fdtdec_get_int(blob, node, "de-active", -1); 1137 if (val != -1) { 1138 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : 1139 DISPLAY_FLAGS_DE_LOW; 1140 } 1141 val = fdtdec_get_int(blob, node, "pixelclk-active", -1); 1142 if (val != -1) { 1143 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : 1144 DISPLAY_FLAGS_PIXDATA_NEGEDGE; 1145 } 1146 1147 if (fdtdec_get_bool(blob, node, "interlaced")) 1148 dt->flags |= DISPLAY_FLAGS_INTERLACED; 1149 if (fdtdec_get_bool(blob, node, "doublescan")) 1150 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; 1151 if (fdtdec_get_bool(blob, node, "doubleclk")) 1152 dt->flags |= DISPLAY_FLAGS_DOUBLECLK; 1153 1154 return ret; 1155 } 1156 1157 int fdtdec_setup_memory_size(void) 1158 { 1159 int ret, mem; 1160 struct fdt_resource res; 1161 1162 mem = fdt_path_offset(gd->fdt_blob, "/memory"); 1163 if (mem < 0) { 1164 debug("%s: Missing /memory node\n", __func__); 1165 return -EINVAL; 1166 } 1167 1168 ret = fdt_get_resource(gd->fdt_blob, mem, "reg", 0, &res); 1169 if (ret != 0) { 1170 debug("%s: Unable to decode first memory bank\n", __func__); 1171 return -EINVAL; 1172 } 1173 1174 gd->ram_size = (phys_size_t)(res.end - res.start + 1); 1175 debug("%s: Initial DRAM size %llx\n", __func__, 1176 (unsigned long long)gd->ram_size); 1177 1178 return 0; 1179 } 1180 1181 #if defined(CONFIG_NR_DRAM_BANKS) 1182 int fdtdec_setup_memory_banksize(void) 1183 { 1184 int bank, ret, mem, reg = 0; 1185 struct fdt_resource res; 1186 1187 mem = fdt_node_offset_by_prop_value(gd->fdt_blob, -1, "device_type", 1188 "memory", 7); 1189 if (mem < 0) { 1190 debug("%s: Missing /memory node\n", __func__); 1191 return -EINVAL; 1192 } 1193 1194 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) { 1195 ret = fdt_get_resource(gd->fdt_blob, mem, "reg", reg++, &res); 1196 if (ret == -FDT_ERR_NOTFOUND) { 1197 reg = 0; 1198 mem = fdt_node_offset_by_prop_value(gd->fdt_blob, mem, 1199 "device_type", 1200 "memory", 7); 1201 if (mem == -FDT_ERR_NOTFOUND) 1202 break; 1203 1204 ret = fdt_get_resource(gd->fdt_blob, mem, "reg", reg++, &res); 1205 if (ret == -FDT_ERR_NOTFOUND) 1206 break; 1207 } 1208 if (ret != 0) { 1209 return -EINVAL; 1210 } 1211 1212 gd->bd->bi_dram[bank].start = (phys_addr_t)res.start; 1213 gd->bd->bi_dram[bank].size = 1214 (phys_size_t)(res.end - res.start + 1); 1215 1216 debug("%s: DRAM Bank #%d: start = 0x%llx, size = 0x%llx\n", 1217 __func__, bank, 1218 (unsigned long long)gd->bd->bi_dram[bank].start, 1219 (unsigned long long)gd->bd->bi_dram[bank].size); 1220 } 1221 1222 return 0; 1223 } 1224 #endif 1225 1226 #if CONFIG_IS_ENABLED(MULTI_DTB_FIT) 1227 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT_GZIP) ||\ 1228 CONFIG_IS_ENABLED(MULTI_DTB_FIT_LZO) 1229 static int uncompress_blob(const void *src, ulong sz_src, void **dstp) 1230 { 1231 size_t sz_out = CONFIG_SPL_MULTI_DTB_FIT_UNCOMPRESS_SZ; 1232 ulong sz_in = sz_src; 1233 void *dst; 1234 int rc; 1235 1236 if (CONFIG_IS_ENABLED(GZIP)) 1237 if (gzip_parse_header(src, sz_in) < 0) 1238 return -1; 1239 if (CONFIG_IS_ENABLED(LZO)) 1240 if (!lzop_is_valid_header(src)) 1241 return -EBADMSG; 1242 1243 if (CONFIG_IS_ENABLED(MULTI_DTB_FIT_DYN_ALLOC)) { 1244 dst = malloc(sz_out); 1245 if (!dst) { 1246 puts("uncompress_blob: Unable to allocate memory\n"); 1247 return -ENOMEM; 1248 } 1249 } else { 1250 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT_USER_DEFINED_AREA) 1251 dst = (void *)CONFIG_VAL(MULTI_DTB_FIT_USER_DEF_ADDR); 1252 # else 1253 return -ENOTSUPP; 1254 # endif 1255 } 1256 1257 if (CONFIG_IS_ENABLED(GZIP)) 1258 rc = gunzip(dst, sz_out, (u8 *)src, &sz_in); 1259 else if (CONFIG_IS_ENABLED(LZO)) 1260 rc = lzop_decompress(src, sz_in, dst, &sz_out); 1261 1262 if (rc < 0) { 1263 /* not a valid compressed blob */ 1264 puts("uncompress_blob: Unable to uncompress\n"); 1265 if (CONFIG_IS_ENABLED(MULTI_DTB_FIT_DYN_ALLOC)) 1266 free(dst); 1267 return -EBADMSG; 1268 } 1269 *dstp = dst; 1270 return 0; 1271 } 1272 # else 1273 static int uncompress_blob(const void *src, ulong sz_src, void **dstp) 1274 { 1275 return -ENOTSUPP; 1276 } 1277 # endif 1278 #endif 1279 1280 #if defined(CONFIG_OF_BOARD) || defined(CONFIG_OF_SEPARATE) 1281 /* 1282 * For CONFIG_OF_SEPARATE, the board may optionally implement this to 1283 * provide and/or fixup the fdt. 1284 */ 1285 __weak void *board_fdt_blob_setup(void) 1286 { 1287 void *fdt_blob = NULL; 1288 #ifdef CONFIG_SPL_BUILD 1289 /* FDT is at end of BSS unless it is in a different memory region */ 1290 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS)) 1291 fdt_blob = (ulong *)&_image_binary_end; 1292 else 1293 fdt_blob = (ulong *)&__bss_end; 1294 #else 1295 /* FDT is at end of image */ 1296 fdt_blob = (ulong *)&_end; 1297 #endif 1298 return fdt_blob; 1299 } 1300 #endif 1301 1302 int fdtdec_setup(void) 1303 { 1304 #if CONFIG_IS_ENABLED(OF_CONTROL) 1305 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT) 1306 void *fdt_blob; 1307 # endif 1308 # ifdef CONFIG_OF_EMBED 1309 /* Get a pointer to the FDT */ 1310 # ifdef CONFIG_SPL_BUILD 1311 gd->fdt_blob = __dtb_dt_spl_begin; 1312 # else 1313 gd->fdt_blob = __dtb_dt_begin; 1314 # endif 1315 # elif defined(CONFIG_OF_BOARD) || defined(CONFIG_OF_SEPARATE) 1316 /* Allow the board to override the fdt address. */ 1317 gd->fdt_blob = board_fdt_blob_setup(); 1318 # elif defined(CONFIG_OF_HOSTFILE) 1319 if (sandbox_read_fdt_from_file()) { 1320 puts("Failed to read control FDT\n"); 1321 return -1; 1322 } 1323 # endif 1324 # ifndef CONFIG_SPL_BUILD 1325 /* Allow the early environment to override the fdt address */ 1326 gd->fdt_blob = (void *)env_get_ulong("fdtcontroladdr", 16, 1327 (uintptr_t)gd->fdt_blob); 1328 # endif 1329 1330 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT) 1331 /* 1332 * Try and uncompress the blob. 1333 * Unfortunately there is no way to know how big the input blob really 1334 * is. So let us set the maximum input size arbitrarily high. 16MB 1335 * ought to be more than enough for packed DTBs. 1336 */ 1337 if (uncompress_blob(gd->fdt_blob, 0x1000000, &fdt_blob) == 0) 1338 gd->fdt_blob = fdt_blob; 1339 1340 /* 1341 * Check if blob is a FIT images containings DTBs. 1342 * If so, pick the most relevant 1343 */ 1344 fdt_blob = locate_dtb_in_fit(gd->fdt_blob); 1345 if (fdt_blob) 1346 gd->fdt_blob = fdt_blob; 1347 # endif 1348 #endif 1349 1350 return fdtdec_prepare_fdt(); 1351 } 1352 1353 #endif /* !USE_HOSTCC */ 1354