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 <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, int ns, 87 fdt_size_t *sizep, bool translate) 88 { 89 const fdt32_t *prop, *prop_end; 90 const fdt32_t *prop_addr, *prop_size, *prop_after_size; 91 int len; 92 fdt_addr_t addr; 93 94 debug("%s: %s: ", __func__, prop_name); 95 96 if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) { 97 debug("(na too large for fdt_addr_t type)\n"); 98 return FDT_ADDR_T_NONE; 99 } 100 101 if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) { 102 debug("(ns too large for fdt_size_t type)\n"); 103 return FDT_ADDR_T_NONE; 104 } 105 106 prop = fdt_getprop(blob, node, prop_name, &len); 107 if (!prop) { 108 debug("(not found)\n"); 109 return FDT_ADDR_T_NONE; 110 } 111 prop_end = prop + (len / sizeof(*prop)); 112 113 prop_addr = prop + (index * (na + ns)); 114 prop_size = prop_addr + na; 115 prop_after_size = prop_size + ns; 116 if (prop_after_size > prop_end) { 117 debug("(not enough data: expected >= %d cells, got %d cells)\n", 118 (u32)(prop_after_size - prop), ((u32)(prop_end - prop))); 119 return FDT_ADDR_T_NONE; 120 } 121 122 #if CONFIG_IS_ENABLED(OF_TRANSLATE) 123 if (translate) 124 addr = fdt_translate_address(blob, node, prop_addr); 125 else 126 #endif 127 addr = fdtdec_get_number(prop_addr, na); 128 129 if (sizep) { 130 *sizep = fdtdec_get_number(prop_size, ns); 131 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr, 132 (unsigned long long)*sizep); 133 } else { 134 debug("addr=%08llx\n", (unsigned long long)addr); 135 } 136 137 return addr; 138 } 139 140 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent, 141 int node, const char *prop_name, int index, fdt_size_t *sizep, 142 bool translate) 143 { 144 int na, ns; 145 146 debug("%s: ", __func__); 147 148 na = fdt_address_cells(blob, parent); 149 if (na < 1) { 150 debug("(bad #address-cells)\n"); 151 return FDT_ADDR_T_NONE; 152 } 153 154 ns = fdt_size_cells(blob, parent); 155 if (ns < 0) { 156 debug("(bad #size-cells)\n"); 157 return FDT_ADDR_T_NONE; 158 } 159 160 debug("na=%d, ns=%d, ", na, ns); 161 162 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na, 163 ns, sizep, translate); 164 } 165 166 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node, 167 const char *prop_name, int index, fdt_size_t *sizep, 168 bool translate) 169 { 170 int parent; 171 172 debug("%s: ", __func__); 173 174 parent = fdt_parent_offset(blob, node); 175 if (parent < 0) { 176 debug("(no parent found)\n"); 177 return FDT_ADDR_T_NONE; 178 } 179 180 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name, 181 index, sizep, translate); 182 } 183 184 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 185 const char *prop_name, fdt_size_t *sizep) 186 { 187 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0; 188 189 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0, 190 sizeof(fdt_addr_t) / sizeof(fdt32_t), 191 ns, sizep, false); 192 } 193 194 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 195 const char *prop_name) 196 { 197 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 198 } 199 200 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI) 201 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 202 const char *prop_name, struct fdt_pci_addr *addr) 203 { 204 const u32 *cell; 205 int len; 206 int ret = -ENOENT; 207 208 debug("%s: %s: ", __func__, prop_name); 209 210 /* 211 * If we follow the pci bus bindings strictly, we should check 212 * the value of the node's parent node's #address-cells and 213 * #size-cells. They need to be 3 and 2 accordingly. However, 214 * for simplicity we skip the check here. 215 */ 216 cell = fdt_getprop(blob, node, prop_name, &len); 217 if (!cell) 218 goto fail; 219 220 if ((len % FDT_PCI_REG_SIZE) == 0) { 221 int num = len / FDT_PCI_REG_SIZE; 222 int i; 223 224 for (i = 0; i < num; i++) { 225 debug("pci address #%d: %08lx %08lx %08lx\n", i, 226 (ulong)fdt32_to_cpu(cell[0]), 227 (ulong)fdt32_to_cpu(cell[1]), 228 (ulong)fdt32_to_cpu(cell[2])); 229 if ((fdt32_to_cpu(*cell) & type) == type) { 230 addr->phys_hi = fdt32_to_cpu(cell[0]); 231 addr->phys_mid = fdt32_to_cpu(cell[1]); 232 addr->phys_lo = fdt32_to_cpu(cell[1]); 233 break; 234 } else { 235 cell += (FDT_PCI_ADDR_CELLS + 236 FDT_PCI_SIZE_CELLS); 237 } 238 } 239 240 if (i == num) { 241 ret = -ENXIO; 242 goto fail; 243 } 244 245 return 0; 246 } else { 247 ret = -EINVAL; 248 } 249 250 fail: 251 debug("(not found)\n"); 252 return ret; 253 } 254 255 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 256 { 257 const char *list, *end; 258 int len; 259 260 list = fdt_getprop(blob, node, "compatible", &len); 261 if (!list) 262 return -ENOENT; 263 264 end = list + len; 265 while (list < end) { 266 char *s; 267 268 len = strlen(list); 269 if (len >= strlen("pciVVVV,DDDD")) { 270 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 0 == strcmp(cell, "okay"); 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 (0 == fdt_node_check_compatible(blob, node, 347 compat_names[id])) 348 return id; 349 return COMPAT_UNKNOWN; 350 } 351 352 int fdtdec_next_compatible(const void *blob, int node, 353 enum fdt_compat_id id) 354 { 355 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 356 } 357 358 int fdtdec_next_compatible_subnode(const void *blob, int node, 359 enum fdt_compat_id id, int *depthp) 360 { 361 do { 362 node = fdt_next_node(blob, node, depthp); 363 } while (*depthp > 1); 364 365 /* If this is a direct subnode, and compatible, return it */ 366 if (*depthp == 1 && 0 == fdt_node_check_compatible( 367 blob, node, compat_names[id])) 368 return node; 369 370 return -FDT_ERR_NOTFOUND; 371 } 372 373 int fdtdec_next_alias(const void *blob, const char *name, 374 enum fdt_compat_id id, int *upto) 375 { 376 #define MAX_STR_LEN 20 377 char str[MAX_STR_LEN + 20]; 378 int node, err; 379 380 /* snprintf() is not available */ 381 assert(strlen(name) < MAX_STR_LEN); 382 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 383 node = fdt_path_offset(blob, str); 384 if (node < 0) 385 return node; 386 err = fdt_node_check_compatible(blob, node, compat_names[id]); 387 if (err < 0) 388 return err; 389 if (err) 390 return -FDT_ERR_NOTFOUND; 391 (*upto)++; 392 return node; 393 } 394 395 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 396 enum fdt_compat_id id, int *node_list, 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, int maxcount) 406 { 407 int name_len = strlen(name); 408 int nodes[maxcount]; 409 int num_found = 0; 410 int offset, node; 411 int alias_node; 412 int count; 413 int i, j; 414 415 /* find the alias node if present */ 416 alias_node = fdt_path_offset(blob, "/aliases"); 417 418 /* 419 * start with nothing, and we can assume that the root node can't 420 * match 421 */ 422 memset(nodes, '\0', sizeof(nodes)); 423 424 /* First find all the compatible nodes */ 425 for (node = count = 0; node >= 0 && count < maxcount;) { 426 node = fdtdec_next_compatible(blob, node, id); 427 if (node >= 0) 428 nodes[count++] = node; 429 } 430 if (node >= 0) 431 debug("%s: warning: maxcount exceeded with alias '%s'\n", 432 __func__, name); 433 434 /* Now find all the aliases */ 435 for (offset = fdt_first_property_offset(blob, alias_node); 436 offset > 0; 437 offset = fdt_next_property_offset(blob, offset)) { 438 const struct fdt_property *prop; 439 const char *path; 440 int number; 441 int found; 442 443 node = 0; 444 prop = fdt_get_property_by_offset(blob, offset, NULL); 445 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 446 if (prop->len && 0 == strncmp(path, name, name_len)) 447 node = fdt_path_offset(blob, prop->data); 448 if (node <= 0) 449 continue; 450 451 /* Get the alias number */ 452 number = simple_strtoul(path + name_len, NULL, 10); 453 if (number < 0 || number >= maxcount) { 454 debug("%s: warning: alias '%s' is out of range\n", 455 __func__, path); 456 continue; 457 } 458 459 /* Make sure the node we found is actually in our list! */ 460 found = -1; 461 for (j = 0; j < count; j++) 462 if (nodes[j] == node) { 463 found = j; 464 break; 465 } 466 467 if (found == -1) { 468 debug("%s: warning: alias '%s' points to a node " 469 "'%s' that is missing or is not compatible " 470 " with '%s'\n", __func__, path, 471 fdt_get_name(blob, node, NULL), 472 compat_names[id]); 473 continue; 474 } 475 476 /* 477 * Add this node to our list in the right place, and mark 478 * it as done. 479 */ 480 if (fdtdec_get_is_enabled(blob, node)) { 481 if (node_list[number]) { 482 debug("%s: warning: alias '%s' requires that " 483 "a node be placed in the list in a " 484 "position which is already filled by " 485 "node '%s'\n", __func__, path, 486 fdt_get_name(blob, node, NULL)); 487 continue; 488 } 489 node_list[number] = node; 490 if (number >= num_found) 491 num_found = number + 1; 492 } 493 nodes[found] = 0; 494 } 495 496 /* Add any nodes not mentioned by an alias */ 497 for (i = j = 0; i < maxcount; i++) { 498 if (!node_list[i]) { 499 for (; j < maxcount; j++) 500 if (nodes[j] && 501 fdtdec_get_is_enabled(blob, nodes[j])) 502 break; 503 504 /* Have we run out of nodes to add? */ 505 if (j == maxcount) 506 break; 507 508 assert(!node_list[i]); 509 node_list[i] = nodes[j++]; 510 if (i >= num_found) 511 num_found = i + 1; 512 } 513 } 514 515 return num_found; 516 } 517 518 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 519 int *seqp) 520 { 521 int base_len = strlen(base); 522 const char *find_name; 523 int find_namelen; 524 int prop_offset; 525 int aliases; 526 527 find_name = fdt_get_name(blob, offset, &find_namelen); 528 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 529 530 aliases = fdt_path_offset(blob, "/aliases"); 531 for (prop_offset = fdt_first_property_offset(blob, aliases); 532 prop_offset > 0; 533 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 534 const char *prop; 535 const char *name; 536 const char *slash; 537 int len, val; 538 539 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 540 debug(" - %s, %s\n", name, prop); 541 if (len < find_namelen || *prop != '/' || prop[len - 1] || 542 strncmp(name, base, base_len)) 543 continue; 544 545 slash = strrchr(prop, '/'); 546 if (strcmp(slash + 1, find_name)) 547 continue; 548 val = trailing_strtol(name); 549 if (val != -1) { 550 *seqp = val; 551 debug("Found seq %d\n", *seqp); 552 return 0; 553 } 554 } 555 556 debug("Not found\n"); 557 return -ENOENT; 558 } 559 560 const char *fdtdec_get_chosen_prop(const void *blob, const char *name) 561 { 562 int chosen_node; 563 564 if (!blob) 565 return NULL; 566 chosen_node = fdt_path_offset(blob, "/chosen"); 567 return fdt_getprop(blob, chosen_node, name, NULL); 568 } 569 570 int fdtdec_get_chosen_node(const void *blob, const char *name) 571 { 572 const char *prop; 573 574 prop = fdtdec_get_chosen_prop(blob, name); 575 if (!prop) 576 return -FDT_ERR_NOTFOUND; 577 return fdt_path_offset(blob, prop); 578 } 579 580 int fdtdec_check_fdt(void) 581 { 582 /* 583 * We must have an FDT, but we cannot panic() yet since the console 584 * is not ready. So for now, just assert(). Boards which need an early 585 * FDT (prior to console ready) will need to make their own 586 * arrangements and do their own checks. 587 */ 588 assert(!fdtdec_prepare_fdt()); 589 return 0; 590 } 591 592 /* 593 * This function is a little odd in that it accesses global data. At some 594 * point if the architecture board.c files merge this will make more sense. 595 * Even now, it is common code. 596 */ 597 int fdtdec_prepare_fdt(void) 598 { 599 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 600 fdt_check_header(gd->fdt_blob)) { 601 #ifdef CONFIG_SPL_BUILD 602 puts("Missing DTB\n"); 603 #else 604 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"); 605 # ifdef DEBUG 606 if (gd->fdt_blob) { 607 printf("fdt_blob=%p\n", gd->fdt_blob); 608 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4, 609 32, 0); 610 } 611 # endif 612 #endif 613 return -1; 614 } 615 return 0; 616 } 617 618 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 619 { 620 const u32 *phandle; 621 int lookup; 622 623 debug("%s: %s\n", __func__, prop_name); 624 phandle = fdt_getprop(blob, node, prop_name, NULL); 625 if (!phandle) 626 return -FDT_ERR_NOTFOUND; 627 628 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 629 return lookup; 630 } 631 632 /** 633 * Look up a property in a node and check that it has a minimum length. 634 * 635 * @param blob FDT blob 636 * @param node node to examine 637 * @param prop_name name of property to find 638 * @param min_len minimum property length in bytes 639 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 640 found, or -FDT_ERR_BADLAYOUT if not enough data 641 * @return pointer to cell, which is only valid if err == 0 642 */ 643 static const void *get_prop_check_min_len(const void *blob, int node, 644 const char *prop_name, int min_len, int *err) 645 { 646 const void *cell; 647 int len; 648 649 debug("%s: %s\n", __func__, prop_name); 650 cell = fdt_getprop(blob, node, prop_name, &len); 651 if (!cell) 652 *err = -FDT_ERR_NOTFOUND; 653 else if (len < min_len) 654 *err = -FDT_ERR_BADLAYOUT; 655 else 656 *err = 0; 657 return cell; 658 } 659 660 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 661 u32 *array, int count) 662 { 663 const u32 *cell; 664 int i, err = 0; 665 666 debug("%s: %s\n", __func__, prop_name); 667 cell = get_prop_check_min_len(blob, node, prop_name, 668 sizeof(u32) * count, &err); 669 if (!err) { 670 for (i = 0; i < count; i++) 671 array[i] = fdt32_to_cpu(cell[i]); 672 } 673 return err; 674 } 675 676 int fdtdec_get_int_array_count(const void *blob, int node, 677 const char *prop_name, u32 *array, int count) 678 { 679 const u32 *cell; 680 int len, elems; 681 int i; 682 683 debug("%s: %s\n", __func__, prop_name); 684 cell = fdt_getprop(blob, node, prop_name, &len); 685 if (!cell) 686 return -FDT_ERR_NOTFOUND; 687 elems = len / sizeof(u32); 688 if (count > elems) 689 count = elems; 690 for (i = 0; i < count; i++) 691 array[i] = fdt32_to_cpu(cell[i]); 692 693 return count; 694 } 695 696 const u32 *fdtdec_locate_array(const void *blob, int node, 697 const char *prop_name, int count) 698 { 699 const u32 *cell; 700 int err; 701 702 cell = get_prop_check_min_len(blob, node, prop_name, 703 sizeof(u32) * count, &err); 704 return err ? NULL : cell; 705 } 706 707 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 708 { 709 const s32 *cell; 710 int len; 711 712 debug("%s: %s\n", __func__, prop_name); 713 cell = fdt_getprop(blob, node, prop_name, &len); 714 return cell != NULL; 715 } 716 717 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 718 const char *list_name, 719 const char *cells_name, 720 int cell_count, int index, 721 struct fdtdec_phandle_args *out_args) 722 { 723 const __be32 *list, *list_end; 724 int rc = 0, size, cur_index = 0; 725 uint32_t count = 0; 726 int node = -1; 727 int phandle; 728 729 /* Retrieve the phandle list property */ 730 list = fdt_getprop(blob, src_node, list_name, &size); 731 if (!list) 732 return -ENOENT; 733 list_end = list + size / sizeof(*list); 734 735 /* Loop over the phandles until all the requested entry is found */ 736 while (list < list_end) { 737 rc = -EINVAL; 738 count = 0; 739 740 /* 741 * If phandle is 0, then it is an empty entry with no 742 * arguments. Skip forward to the next entry. 743 */ 744 phandle = be32_to_cpup(list++); 745 if (phandle) { 746 /* 747 * Find the provider node and parse the #*-cells 748 * property to determine the argument length. 749 * 750 * This is not needed if the cell count is hard-coded 751 * (i.e. cells_name not set, but cell_count is set), 752 * except when we're going to return the found node 753 * below. 754 */ 755 if (cells_name || cur_index == index) { 756 node = fdt_node_offset_by_phandle(blob, 757 phandle); 758 if (!node) { 759 debug("%s: could not find phandle\n", 760 fdt_get_name(blob, src_node, 761 NULL)); 762 goto err; 763 } 764 } 765 766 if (cells_name) { 767 count = fdtdec_get_int(blob, node, cells_name, 768 -1); 769 if (count == -1) { 770 debug("%s: could not get %s for %s\n", 771 fdt_get_name(blob, src_node, 772 NULL), 773 cells_name, 774 fdt_get_name(blob, node, 775 NULL)); 776 goto err; 777 } 778 } else { 779 count = cell_count; 780 } 781 782 /* 783 * Make sure that the arguments actually fit in the 784 * remaining property data length 785 */ 786 if (list + count > list_end) { 787 debug("%s: arguments longer than property\n", 788 fdt_get_name(blob, src_node, NULL)); 789 goto err; 790 } 791 } 792 793 /* 794 * All of the error cases above bail out of the loop, so at 795 * this point, the parsing is successful. If the requested 796 * index matches, then fill the out_args structure and return, 797 * or return -ENOENT for an empty entry. 798 */ 799 rc = -ENOENT; 800 if (cur_index == index) { 801 if (!phandle) 802 goto err; 803 804 if (out_args) { 805 int i; 806 807 if (count > MAX_PHANDLE_ARGS) { 808 debug("%s: too many arguments %d\n", 809 fdt_get_name(blob, src_node, 810 NULL), count); 811 count = MAX_PHANDLE_ARGS; 812 } 813 out_args->node = node; 814 out_args->args_count = count; 815 for (i = 0; i < count; i++) { 816 out_args->args[i] = 817 be32_to_cpup(list++); 818 } 819 } 820 821 /* Found it! return success */ 822 return 0; 823 } 824 825 node = -1; 826 list += count; 827 cur_index++; 828 } 829 830 /* 831 * Result will be one of: 832 * -ENOENT : index is for empty phandle 833 * -EINVAL : parsing error on data 834 * [1..n] : Number of phandle (count mode; when index = -1) 835 */ 836 rc = index < 0 ? cur_index : -ENOENT; 837 err: 838 return rc; 839 } 840 841 int fdtdec_get_child_count(const void *blob, int node) 842 { 843 int subnode; 844 int num = 0; 845 846 fdt_for_each_subnode(subnode, blob, node) 847 num++; 848 849 return num; 850 } 851 852 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 853 u8 *array, int count) 854 { 855 const u8 *cell; 856 int err; 857 858 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 859 if (!err) 860 memcpy(array, cell, count); 861 return err; 862 } 863 864 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 865 const char *prop_name, int count) 866 { 867 const u8 *cell; 868 int err; 869 870 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 871 if (err) 872 return NULL; 873 return cell; 874 } 875 876 int fdtdec_get_config_int(const void *blob, const char *prop_name, 877 int default_val) 878 { 879 int config_node; 880 881 debug("%s: %s\n", __func__, prop_name); 882 config_node = fdt_path_offset(blob, "/config"); 883 if (config_node < 0) 884 return default_val; 885 return fdtdec_get_int(blob, config_node, prop_name, default_val); 886 } 887 888 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 889 { 890 int config_node; 891 const void *prop; 892 893 debug("%s: %s\n", __func__, prop_name); 894 config_node = fdt_path_offset(blob, "/config"); 895 if (config_node < 0) 896 return 0; 897 prop = fdt_get_property(blob, config_node, prop_name, NULL); 898 899 return prop != NULL; 900 } 901 902 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 903 { 904 const char *nodep; 905 int nodeoffset; 906 int len; 907 908 debug("%s: %s\n", __func__, prop_name); 909 nodeoffset = fdt_path_offset(blob, "/config"); 910 if (nodeoffset < 0) 911 return NULL; 912 913 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 914 if (!nodep) 915 return NULL; 916 917 return (char *)nodep; 918 } 919 920 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 921 fdt_addr_t *basep, fdt_size_t *sizep) 922 { 923 const fdt_addr_t *cell; 924 int len; 925 926 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 927 prop_name); 928 cell = fdt_getprop(blob, node, prop_name, &len); 929 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 930 debug("cell=%p, len=%d\n", cell, len); 931 return -1; 932 } 933 934 *basep = fdt_addr_to_cpu(*cell); 935 *sizep = fdt_size_to_cpu(cell[1]); 936 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 937 (ulong)*sizep); 938 939 return 0; 940 } 941 942 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 943 { 944 u64 number = 0; 945 946 while (cells--) 947 number = (number << 32) | fdt32_to_cpu(*ptr++); 948 949 return number; 950 } 951 952 int fdt_get_resource(const void *fdt, int node, const char *property, 953 unsigned int index, struct fdt_resource *res) 954 { 955 const fdt32_t *ptr, *end; 956 int na, ns, len, parent; 957 unsigned int i = 0; 958 959 parent = fdt_parent_offset(fdt, node); 960 if (parent < 0) 961 return parent; 962 963 na = fdt_address_cells(fdt, parent); 964 ns = fdt_size_cells(fdt, parent); 965 966 ptr = fdt_getprop(fdt, node, property, &len); 967 if (!ptr) 968 return len; 969 970 end = ptr + len / sizeof(*ptr); 971 972 while (ptr + na + ns <= end) { 973 if (i == index) { 974 res->start = res->end = fdtdec_get_number(ptr, na); 975 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 976 return 0; 977 } 978 979 ptr += na + ns; 980 i++; 981 } 982 983 return -FDT_ERR_NOTFOUND; 984 } 985 986 int fdt_get_named_resource(const void *fdt, int node, const char *property, 987 const char *prop_names, const char *name, 988 struct fdt_resource *res) 989 { 990 int index; 991 992 index = fdt_stringlist_search(fdt, node, prop_names, name); 993 if (index < 0) 994 return index; 995 996 return fdt_get_resource(fdt, node, property, index, res); 997 } 998 999 int fdtdec_decode_memory_region(const void *blob, int config_node, 1000 const char *mem_type, const char *suffix, 1001 fdt_addr_t *basep, fdt_size_t *sizep) 1002 { 1003 char prop_name[50]; 1004 const char *mem; 1005 fdt_size_t size, offset_size; 1006 fdt_addr_t base, offset; 1007 int node; 1008 1009 if (config_node == -1) { 1010 config_node = fdt_path_offset(blob, "/config"); 1011 if (config_node < 0) { 1012 debug("%s: Cannot find /config node\n", __func__); 1013 return -ENOENT; 1014 } 1015 } 1016 if (!suffix) 1017 suffix = ""; 1018 1019 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 1020 suffix); 1021 mem = fdt_getprop(blob, config_node, prop_name, NULL); 1022 if (!mem) { 1023 debug("%s: No memory type for '%s', using /memory\n", __func__, 1024 prop_name); 1025 mem = "/memory"; 1026 } 1027 1028 node = fdt_path_offset(blob, mem); 1029 if (node < 0) { 1030 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 1031 fdt_strerror(node)); 1032 return -ENOENT; 1033 } 1034 1035 /* 1036 * Not strictly correct - the memory may have multiple banks. We just 1037 * use the first 1038 */ 1039 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 1040 debug("%s: Failed to decode memory region %s\n", __func__, 1041 mem); 1042 return -EINVAL; 1043 } 1044 1045 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 1046 suffix); 1047 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 1048 &offset_size)) { 1049 debug("%s: Failed to decode memory region '%s'\n", __func__, 1050 prop_name); 1051 return -EINVAL; 1052 } 1053 1054 *basep = base + offset; 1055 *sizep = offset_size; 1056 1057 return 0; 1058 } 1059 1060 static int decode_timing_property(const void *blob, int node, const char *name, 1061 struct timing_entry *result) 1062 { 1063 int length, ret = 0; 1064 const u32 *prop; 1065 1066 prop = fdt_getprop(blob, node, name, &length); 1067 if (!prop) { 1068 debug("%s: could not find property %s\n", 1069 fdt_get_name(blob, node, NULL), name); 1070 return length; 1071 } 1072 1073 if (length == sizeof(u32)) { 1074 result->typ = fdtdec_get_int(blob, node, name, 0); 1075 result->min = result->typ; 1076 result->max = result->typ; 1077 } else { 1078 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3); 1079 } 1080 1081 return ret; 1082 } 1083 1084 int fdtdec_decode_display_timing(const void *blob, int parent, int index, 1085 struct display_timing *dt) 1086 { 1087 int i, node, timings_node; 1088 u32 val = 0; 1089 int ret = 0; 1090 1091 timings_node = fdt_subnode_offset(blob, parent, "display-timings"); 1092 if (timings_node < 0) 1093 return timings_node; 1094 1095 for (i = 0, node = fdt_first_subnode(blob, timings_node); 1096 node > 0 && i != index; 1097 node = fdt_next_subnode(blob, node)) 1098 i++; 1099 1100 if (node < 0) 1101 return node; 1102 1103 memset(dt, 0, sizeof(*dt)); 1104 1105 ret |= decode_timing_property(blob, node, "hback-porch", 1106 &dt->hback_porch); 1107 ret |= decode_timing_property(blob, node, "hfront-porch", 1108 &dt->hfront_porch); 1109 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive); 1110 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len); 1111 ret |= decode_timing_property(blob, node, "vback-porch", 1112 &dt->vback_porch); 1113 ret |= decode_timing_property(blob, node, "vfront-porch", 1114 &dt->vfront_porch); 1115 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive); 1116 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len); 1117 ret |= decode_timing_property(blob, node, "clock-frequency", 1118 &dt->pixelclock); 1119 1120 dt->flags = 0; 1121 val = fdtdec_get_int(blob, node, "vsync-active", -1); 1122 if (val != -1) { 1123 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : 1124 DISPLAY_FLAGS_VSYNC_LOW; 1125 } 1126 val = fdtdec_get_int(blob, node, "hsync-active", -1); 1127 if (val != -1) { 1128 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : 1129 DISPLAY_FLAGS_HSYNC_LOW; 1130 } 1131 val = fdtdec_get_int(blob, node, "de-active", -1); 1132 if (val != -1) { 1133 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : 1134 DISPLAY_FLAGS_DE_LOW; 1135 } 1136 val = fdtdec_get_int(blob, node, "pixelclk-active", -1); 1137 if (val != -1) { 1138 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : 1139 DISPLAY_FLAGS_PIXDATA_NEGEDGE; 1140 } 1141 1142 if (fdtdec_get_bool(blob, node, "interlaced")) 1143 dt->flags |= DISPLAY_FLAGS_INTERLACED; 1144 if (fdtdec_get_bool(blob, node, "doublescan")) 1145 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; 1146 if (fdtdec_get_bool(blob, node, "doubleclk")) 1147 dt->flags |= DISPLAY_FLAGS_DOUBLECLK; 1148 1149 return ret; 1150 } 1151 1152 int fdtdec_setup_memory_size(void) 1153 { 1154 int ret, mem; 1155 struct fdt_resource res; 1156 1157 mem = fdt_path_offset(gd->fdt_blob, "/memory"); 1158 if (mem < 0) { 1159 debug("%s: Missing /memory node\n", __func__); 1160 return -EINVAL; 1161 } 1162 1163 ret = fdt_get_resource(gd->fdt_blob, mem, "reg", 0, &res); 1164 if (ret != 0) { 1165 debug("%s: Unable to decode first memory bank\n", __func__); 1166 return -EINVAL; 1167 } 1168 1169 gd->ram_size = (phys_size_t)(res.end - res.start + 1); 1170 debug("%s: Initial DRAM size %llx\n", __func__, 1171 (unsigned long long)gd->ram_size); 1172 1173 return 0; 1174 } 1175 1176 #if defined(CONFIG_NR_DRAM_BANKS) 1177 int fdtdec_setup_memory_banksize(void) 1178 { 1179 int bank, ret, mem; 1180 struct fdt_resource res; 1181 1182 mem = fdt_path_offset(gd->fdt_blob, "/memory"); 1183 if (mem < 0) { 1184 debug("%s: Missing /memory node\n", __func__); 1185 return -EINVAL; 1186 } 1187 1188 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) { 1189 ret = fdt_get_resource(gd->fdt_blob, mem, "reg", bank, &res); 1190 if (ret == -FDT_ERR_NOTFOUND) 1191 break; 1192 if (ret != 0) 1193 return -EINVAL; 1194 1195 gd->bd->bi_dram[bank].start = (phys_addr_t)res.start; 1196 gd->bd->bi_dram[bank].size = 1197 (phys_size_t)(res.end - res.start + 1); 1198 1199 debug("%s: DRAM Bank #%d: start = 0x%llx, size = 0x%llx\n", 1200 __func__, bank, 1201 (unsigned long long)gd->bd->bi_dram[bank].start, 1202 (unsigned long long)gd->bd->bi_dram[bank].size); 1203 } 1204 1205 return 0; 1206 } 1207 #endif 1208 1209 #if CONFIG_IS_ENABLED(MULTI_DTB_FIT) 1210 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT_GZIP) ||\ 1211 CONFIG_IS_ENABLED(MULTI_DTB_FIT_LZO) 1212 static int uncompress_blob(const void *src, ulong sz_src, void **dstp) 1213 { 1214 size_t sz_out = CONFIG_SPL_MULTI_DTB_FIT_UNCOMPRESS_SZ; 1215 ulong sz_in = sz_src; 1216 void *dst; 1217 int rc; 1218 1219 if (CONFIG_IS_ENABLED(GZIP)) 1220 if (gzip_parse_header(src, sz_in) < 0) 1221 return -1; 1222 if (CONFIG_IS_ENABLED(LZO)) 1223 if (!lzop_is_valid_header(src)) 1224 return -EBADMSG; 1225 1226 if (CONFIG_IS_ENABLED(MULTI_DTB_FIT_DYN_ALLOC)) { 1227 dst = malloc(sz_out); 1228 if (!dst) { 1229 puts("uncompress_blob: Unable to allocate memory\n"); 1230 return -ENOMEM; 1231 } 1232 } else { 1233 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT_USER_DEFINED_AREA) 1234 dst = (void *)CONFIG_VAL(MULTI_DTB_FIT_USER_DEF_ADDR); 1235 # else 1236 return -ENOTSUPP; 1237 # endif 1238 } 1239 1240 if (CONFIG_IS_ENABLED(GZIP)) 1241 rc = gunzip(dst, sz_out, (u8 *)src, &sz_in); 1242 else if (CONFIG_IS_ENABLED(LZO)) 1243 rc = lzop_decompress(src, sz_in, dst, &sz_out); 1244 1245 if (rc < 0) { 1246 /* not a valid compressed blob */ 1247 puts("uncompress_blob: Unable to uncompress\n"); 1248 if (CONFIG_IS_ENABLED(MULTI_DTB_FIT_DYN_ALLOC)) 1249 free(dst); 1250 return -EBADMSG; 1251 } 1252 *dstp = dst; 1253 return 0; 1254 } 1255 # else 1256 static int uncompress_blob(const void *src, ulong sz_src, void **dstp) 1257 { 1258 return -ENOTSUPP; 1259 } 1260 # endif 1261 #endif 1262 1263 int fdtdec_setup(void) 1264 { 1265 #if CONFIG_IS_ENABLED(OF_CONTROL) 1266 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT) 1267 void *fdt_blob; 1268 # endif 1269 # ifdef CONFIG_OF_EMBED 1270 /* Get a pointer to the FDT */ 1271 # ifdef CONFIG_SPL_BUILD 1272 gd->fdt_blob = __dtb_dt_spl_begin; 1273 # else 1274 gd->fdt_blob = __dtb_dt_begin; 1275 # endif 1276 # elif defined CONFIG_OF_SEPARATE 1277 # ifdef CONFIG_SPL_BUILD 1278 /* FDT is at end of BSS unless it is in a different memory region */ 1279 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS)) 1280 gd->fdt_blob = (ulong *)&_image_binary_end; 1281 else 1282 gd->fdt_blob = (ulong *)&__bss_end; 1283 # else 1284 /* FDT is at end of image */ 1285 gd->fdt_blob = (ulong *)&_end; 1286 # endif 1287 # elif defined(CONFIG_OF_BOARD) 1288 /* Allow the board to override the fdt address. */ 1289 gd->fdt_blob = board_fdt_blob_setup(); 1290 # elif defined(CONFIG_OF_HOSTFILE) 1291 if (sandbox_read_fdt_from_file()) { 1292 puts("Failed to read control FDT\n"); 1293 return -1; 1294 } 1295 # endif 1296 # ifndef CONFIG_SPL_BUILD 1297 /* Allow the early environment to override the fdt address */ 1298 gd->fdt_blob = (void *)env_get_ulong("fdtcontroladdr", 16, 1299 (uintptr_t)gd->fdt_blob); 1300 # endif 1301 1302 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT) 1303 /* 1304 * Try and uncompress the blob. 1305 * Unfortunately there is no way to know how big the input blob really 1306 * is. So let us set the maximum input size arbitrarily high. 16MB 1307 * ought to be more than enough for packed DTBs. 1308 */ 1309 if (uncompress_blob(gd->fdt_blob, 0x1000000, &fdt_blob) == 0) 1310 gd->fdt_blob = fdt_blob; 1311 1312 /* 1313 * Check if blob is a FIT images containings DTBs. 1314 * If so, pick the most relevant 1315 */ 1316 fdt_blob = locate_dtb_in_fit(gd->fdt_blob); 1317 if (fdt_blob) 1318 gd->fdt_blob = fdt_blob; 1319 # endif 1320 #endif 1321 1322 return fdtdec_prepare_fdt(); 1323 } 1324 1325 #endif /* !USE_HOSTCC */ 1326