lib/fdtdec.c

   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 <dm.h>
   9 #include <errno.h>
  10 #include <serial.h>
  11 #include <libfdt.h>
  12 #include <fdtdec.h>
  13 #include <asm/sections.h>
  14 #include <linux/ctype.h>
  15
  16 DECLARE_GLOBAL_DATA_PTR;
  17
  18 /*
  19  * Here are the type we know about. One day we might allow drivers to
  20  * register. For now we just put them here. The COMPAT macro allows us to
  21  * turn this into a sparse list later, and keeps the ID with the name.
  22  */
  23 #define COMPAT(id, name) name
  24 static const char * const compat_names[COMPAT_COUNT] = {
  25         COMPAT(UNKNOWN, "<none>"),
  26         COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
  27         COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
  28         COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
  29         COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"),
  30         COMPAT(NVIDIA_TEGRA124_DC, "nvidia,tegra124-dc"),
  31         COMPAT(NVIDIA_TEGRA124_SOR, "nvidia,tegra124-sor"),
  32         COMPAT(NVIDIA_TEGRA124_PMC, "nvidia,tegra124-pmc"),
  33         COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"),
  34         COMPAT(NVIDIA_TEGRA210_SDMMC, "nvidia,tegra210-sdhci"),
  35         COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"),
  36         COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"),
  37         COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"),
  38         COMPAT(NVIDIA_TEGRA124_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(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"),
  46         COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
  47         COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
  48         COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
  49         COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"),
  50         COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
  51         COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"),
  52         COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
  53         COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),
  54         COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"),
  55         COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"),
  56         COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
  57         COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
  58         COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
  59         COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"),
  60         COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
  61         COMPAT(INTEL_MICROCODE, "intel,microcode"),
  62         COMPAT(MEMORY_SPD, "memory-spd"),
  63         COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"),
  64         COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"),
  65         COMPAT(INTEL_GMA, "intel,gma"),
  66         COMPAT(AMS_AS3722, "ams,as3722"),
  67         COMPAT(INTEL_ICH_SPI, "intel,ich-spi"),
  68         COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
  69         COMPAT(INTEL_X86_PINCTRL, "intel,x86-pinctrl"),
  70         COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"),
  71         COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"),
  72         COMPAT(COMPAT_INTEL_IRQ_ROUTER, "intel,irq-router"),
  73         COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"),
  74         COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"),
  75         COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"),
  76         COMPAT(COMPAT_INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
  77         COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
  78         COMPAT(COMPAT_INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"),
  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)
  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         addr = fdtdec_get_number(prop_addr, na);
 126
 127         if (sizep) {
 128                 *sizep = fdtdec_get_number(prop_size, ns);
 129                 debug("addr=%08llx, size=%llx\n", (u64)addr, (u64)*sizep);
 130         } else {
 131                 debug("addr=%08llx\n", (u64)addr);
 132         }
 133
 134         return addr;
 135 }
 136
 137 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent,
 138                 int node, const char *prop_name, int index, fdt_size_t *sizep)
 139 {
 140         int na, ns;
 141
 142         debug("%s: ", __func__);
 143
 144         na = fdt_address_cells(blob, parent);
 145         if (na < 1) {
 146                 debug("(bad #address-cells)\n");
 147                 return FDT_ADDR_T_NONE;
 148         }
 149
 150         ns = fdt_size_cells(blob, parent);
 151         if (ns < 0) {
 152                 debug("(bad #size-cells)\n");
 153                 return FDT_ADDR_T_NONE;
 154         }
 155
 156         debug("na=%d, ns=%d, ", na, ns);
 157
 158         return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na,
 159                                           ns, sizep);
 160 }
 161
 162 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node,
 163                 const char *prop_name, int index, fdt_size_t *sizep)
 164 {
 165         int parent;
 166
 167         debug("%s: ", __func__);
 168
 169         parent = fdt_parent_offset(blob, node);
 170         if (parent < 0) {
 171                 debug("(no parent found)\n");
 172                 return FDT_ADDR_T_NONE;
 173         }
 174
 175         return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name,
 176                                                 index, sizep);
 177 }
 178
 179 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
 180                 const char *prop_name, fdt_size_t *sizep)
 181 {
 182         int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0;
 183
 184         return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0,
 185                                           sizeof(fdt_addr_t) / sizeof(fdt32_t),
 186                                           ns, sizep);
 187 }
 188
 189 fdt_addr_t fdtdec_get_addr(const void *blob, int node,
 190                 const char *prop_name)
 191 {
 192         return fdtdec_get_addr_size(blob, node, prop_name, NULL);
 193 }
 194
 195 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)
 196 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
 197                 const char *prop_name, struct fdt_pci_addr *addr)
 198 {
 199         const u32 *cell;
 200         int len;
 201         int ret = -ENOENT;
 202
 203         debug("%s: %s: ", __func__, prop_name);
 204
 205         /*
 206          * If we follow the pci bus bindings strictly, we should check
 207          * the value of the node's parent node's #address-cells and
 208          * #size-cells. They need to be 3 and 2 accordingly. However,
 209          * for simplicity we skip the check here.
 210          */
 211         cell = fdt_getprop(blob, node, prop_name, &len);
 212         if (!cell)
 213                 goto fail;
 214
 215         if ((len % FDT_PCI_REG_SIZE) == 0) {
 216                 int num = len / FDT_PCI_REG_SIZE;
 217                 int i;
 218
 219                 for (i = 0; i < num; i++) {
 220                         debug("pci address #%d: %08lx %08lx %08lx\n", i,
 221                               (ulong)fdt32_to_cpu(cell[0]),
 222                               (ulong)fdt32_to_cpu(cell[1]),
 223                               (ulong)fdt32_to_cpu(cell[2]));
 224                         if ((fdt32_to_cpu(*cell) & type) == type) {
 225                                 addr->phys_hi = fdt32_to_cpu(cell[0]);
 226                                 addr->phys_mid = fdt32_to_cpu(cell[1]);
 227                                 addr->phys_lo = fdt32_to_cpu(cell[1]);
 228                                 break;
 229                         } else {
 230                                 cell += (FDT_PCI_ADDR_CELLS +
 231                                          FDT_PCI_SIZE_CELLS);
 232                         }
 233                 }
 234
 235                 if (i == num) {
 236                         ret = -ENXIO;
 237                         goto fail;
 238                 }
 239
 240                 return 0;
 241         } else {
 242                 ret = -EINVAL;
 243         }
 244
 245 fail:
 246         debug("(not found)\n");
 247         return ret;
 248 }
 249
 250 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
 251 {
 252         const char *list, *end;
 253         int len;
 254
 255         list = fdt_getprop(blob, node, "compatible", &len);
 256         if (!list)
 257                 return -ENOENT;
 258
 259         end = list + len;
 260         while (list < end) {
 261                 char *s;
 262
 263                 len = strlen(list);
 264                 if (len >= strlen("pciVVVV,DDDD")) {
 265                         s = strstr(list, "pci");
 266
 267                         /*
 268                          * check if the string is something like pciVVVV,DDDD.RR
 269                          * or just pciVVVV,DDDD
 270                          */
 271                         if (s && s[7] == ',' &&
 272                             (s[12] == '.' || s[12] == 0)) {
 273                                 s += 3;
 274                                 *vendor = simple_strtol(s, NULL, 16);
 275
 276                                 s += 5;
 277                                 *device = simple_strtol(s, NULL, 16);
 278
 279                                 return 0;
 280                         }
 281                 }
 282                 list += (len + 1);
 283         }
 284
 285         return -ENOENT;
 286 }
 287
 288 int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr,
 289                          u32 *bar)
 290 {
 291         int barnum;
 292
 293         /* extract the bar number from fdt_pci_addr */
 294         barnum = addr->phys_hi & 0xff;
 295         if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
 296                 return -EINVAL;
 297
 298         barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
 299         *bar = dm_pci_read_bar32(dev, barnum);
 300
 301         return 0;
 302 }
 303 #endif
 304
 305 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
 306                 uint64_t default_val)
 307 {
 308         const uint64_t *cell64;
 309         int length;
 310
 311         cell64 = fdt_getprop(blob, node, prop_name, &length);
 312         if (!cell64 || length < sizeof(*cell64))
 313                 return default_val;
 314
 315         return fdt64_to_cpu(*cell64);
 316 }
 317
 318 int fdtdec_get_is_enabled(const void *blob, int node)
 319 {
 320         const char *cell;
 321
 322         /*
 323          * It should say "okay", so only allow that. Some fdts use "ok" but
 324          * this is a bug. Please fix your device tree source file. See here
 325          * for discussion:
 326          *
 327          * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
 328          */
 329         cell = fdt_getprop(blob, node, "status", NULL);
 330         if (cell)
 331                 return 0 == strcmp(cell, "okay");
 332         return 1;
 333 }
 334
 335 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
 336 {
 337         enum fdt_compat_id id;
 338
 339         /* Search our drivers */
 340         for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
 341                 if (0 == fdt_node_check_compatible(blob, node,
 342                                 compat_names[id]))
 343                         return id;
 344         return COMPAT_UNKNOWN;
 345 }
 346
 347 int fdtdec_next_compatible(const void *blob, int node,
 348                 enum fdt_compat_id id)
 349 {
 350         return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
 351 }
 352
 353 int fdtdec_next_compatible_subnode(const void *blob, int node,
 354                 enum fdt_compat_id id, int *depthp)
 355 {
 356         do {
 357                 node = fdt_next_node(blob, node, depthp);
 358         } while (*depthp > 1);
 359
 360         /* If this is a direct subnode, and compatible, return it */
 361         if (*depthp == 1 && 0 == fdt_node_check_compatible(
 362                                                 blob, node, compat_names[id]))
 363                 return node;
 364
 365         return -FDT_ERR_NOTFOUND;
 366 }
 367
 368 int fdtdec_next_alias(const void *blob, const char *name,
 369                 enum fdt_compat_id id, int *upto)
 370 {
 371 #define MAX_STR_LEN 20
 372         char str[MAX_STR_LEN + 20];
 373         int node, err;
 374
 375         /* snprintf() is not available */
 376         assert(strlen(name) < MAX_STR_LEN);
 377         sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
 378         node = fdt_path_offset(blob, str);
 379         if (node < 0)
 380                 return node;
 381         err = fdt_node_check_compatible(blob, node, compat_names[id]);
 382         if (err < 0)
 383                 return err;
 384         if (err)
 385                 return -FDT_ERR_NOTFOUND;
 386         (*upto)++;
 387         return node;
 388 }
 389
 390 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
 391                         enum fdt_compat_id id, int *node_list, int maxcount)
 392 {
 393         memset(node_list, '\0', sizeof(*node_list) * maxcount);
 394
 395         return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
 396 }
 397
 398 /* TODO: Can we tighten this code up a little? */
 399 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
 400                         enum fdt_compat_id id, int *node_list, int maxcount)
 401 {
 402         int name_len = strlen(name);
 403         int nodes[maxcount];
 404         int num_found = 0;
 405         int offset, node;
 406         int alias_node;
 407         int count;
 408         int i, j;
 409
 410         /* find the alias node if present */
 411         alias_node = fdt_path_offset(blob, "/aliases");
 412
 413         /*
 414          * start with nothing, and we can assume that the root node can't
 415          * match
 416          */
 417         memset(nodes, '\0', sizeof(nodes));
 418
 419         /* First find all the compatible nodes */
 420         for (node = count = 0; node >= 0 && count < maxcount;) {
 421                 node = fdtdec_next_compatible(blob, node, id);
 422                 if (node >= 0)
 423                         nodes[count++] = node;
 424         }
 425         if (node >= 0)
 426                 debug("%s: warning: maxcount exceeded with alias '%s'\n",
 427                        __func__, name);
 428
 429         /* Now find all the aliases */
 430         for (offset = fdt_first_property_offset(blob, alias_node);
 431                         offset > 0;
 432                         offset = fdt_next_property_offset(blob, offset)) {
 433                 const struct fdt_property *prop;
 434                 const char *path;
 435                 int number;
 436                 int found;
 437
 438                 node = 0;
 439                 prop = fdt_get_property_by_offset(blob, offset, NULL);
 440                 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
 441                 if (prop->len && 0 == strncmp(path, name, name_len))
 442                         node = fdt_path_offset(blob, prop->data);
 443                 if (node <= 0)
 444                         continue;
 445
 446                 /* Get the alias number */
 447                 number = simple_strtoul(path + name_len, NULL, 10);
 448                 if (number < 0 || number >= maxcount) {
 449                         debug("%s: warning: alias '%s' is out of range\n",
 450                                __func__, path);
 451                         continue;
 452                 }
 453
 454                 /* Make sure the node we found is actually in our list! */
 455                 found = -1;
 456                 for (j = 0; j < count; j++)
 457                         if (nodes[j] == node) {
 458                                 found = j;
 459                                 break;
 460                         }
 461
 462                 if (found == -1) {
 463                         debug("%s: warning: alias '%s' points to a node "
 464                                 "'%s' that is missing or is not compatible "
 465                                 " with '%s'\n", __func__, path,
 466                                 fdt_get_name(blob, node, NULL),
 467                                compat_names[id]);
 468                         continue;
 469                 }
 470
 471                 /*
 472                  * Add this node to our list in the right place, and mark
 473                  * it as done.
 474                  */
 475                 if (fdtdec_get_is_enabled(blob, node)) {
 476                         if (node_list[number]) {
 477                                 debug("%s: warning: alias '%s' requires that "
 478                                       "a node be placed in the list in a "
 479                                       "position which is already filled by "
 480                                       "node '%s'\n", __func__, path,
 481                                       fdt_get_name(blob, node, NULL));
 482                                 continue;
 483                         }
 484                         node_list[number] = node;
 485                         if (number >= num_found)
 486                                 num_found = number + 1;
 487                 }
 488                 nodes[found] = 0;
 489         }
 490
 491         /* Add any nodes not mentioned by an alias */
 492         for (i = j = 0; i < maxcount; i++) {
 493                 if (!node_list[i]) {
 494                         for (; j < maxcount; j++)
 495                                 if (nodes[j] &&
 496                                         fdtdec_get_is_enabled(blob, nodes[j]))
 497                                         break;
 498
 499                         /* Have we run out of nodes to add? */
 500                         if (j == maxcount)
 501                                 break;
 502
 503                         assert(!node_list[i]);
 504                         node_list[i] = nodes[j++];
 505                         if (i >= num_found)
 506                                 num_found = i + 1;
 507                 }
 508         }
 509
 510         return num_found;
 511 }
 512
 513 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
 514                          int *seqp)
 515 {
 516         int base_len = strlen(base);
 517         const char *find_name;
 518         int find_namelen;
 519         int prop_offset;
 520         int aliases;
 521
 522         find_name = fdt_get_name(blob, offset, &find_namelen);
 523         debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
 524
 525         aliases = fdt_path_offset(blob, "/aliases");
 526         for (prop_offset = fdt_first_property_offset(blob, aliases);
 527              prop_offset > 0;
 528              prop_offset = fdt_next_property_offset(blob, prop_offset)) {
 529                 const char *prop;
 530                 const char *name;
 531                 const char *slash;
 532                 int len, val;
 533
 534                 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
 535                 debug("   - %s, %s\n", name, prop);
 536                 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
 537                     strncmp(name, base, base_len))
 538                         continue;
 539
 540                 slash = strrchr(prop, '/');
 541                 if (strcmp(slash + 1, find_name))
 542                         continue;
 543                 val = trailing_strtol(name);
 544                 if (val != -1) {
 545                         *seqp = val;
 546                         debug("Found seq %d\n", *seqp);
 547                         return 0;
 548                 }
 549         }
 550
 551         debug("Not found\n");
 552         return -ENOENT;
 553 }
 554
 555 const char *fdtdec_get_chosen_prop(const void *blob, const char *name)
 556 {
 557         int chosen_node;
 558
 559         if (!blob)
 560                 return NULL;
 561         chosen_node = fdt_path_offset(blob, "/chosen");
 562         return fdt_getprop(blob, chosen_node, name, NULL);
 563 }
 564
 565 int fdtdec_get_chosen_node(const void *blob, const char *name)
 566 {
 567         const char *prop;
 568
 569         prop = fdtdec_get_chosen_prop(blob, name);
 570         if (!prop)
 571                 return -FDT_ERR_NOTFOUND;
 572         return fdt_path_offset(blob, prop);
 573 }
 574
 575 int fdtdec_check_fdt(void)
 576 {
 577         /*
 578          * We must have an FDT, but we cannot panic() yet since the console
 579          * is not ready. So for now, just assert(). Boards which need an early
 580          * FDT (prior to console ready) will need to make their own
 581          * arrangements and do their own checks.
 582          */
 583         assert(!fdtdec_prepare_fdt());
 584         return 0;
 585 }
 586
 587 /*
 588  * This function is a little odd in that it accesses global data. At some
 589  * point if the architecture board.c files merge this will make more sense.
 590  * Even now, it is common code.
 591  */
 592 int fdtdec_prepare_fdt(void)
 593 {
 594         if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
 595             fdt_check_header(gd->fdt_blob)) {
 596 #ifdef CONFIG_SPL_BUILD
 597                 puts("Missing DTB\n");
 598 #else
 599                 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");
 600 # ifdef DEBUG
 601                 if (gd->fdt_blob) {
 602                         printf("fdt_blob=%p\n", gd->fdt_blob);
 603                         print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
 604                                      32, 0);
 605                 }
 606 # endif
 607 #endif
 608                 return -1;
 609         }
 610         return 0;
 611 }
 612
 613 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
 614 {
 615         const u32 *phandle;
 616         int lookup;
 617
 618         debug("%s: %s\n", __func__, prop_name);
 619         phandle = fdt_getprop(blob, node, prop_name, NULL);
 620         if (!phandle)
 621                 return -FDT_ERR_NOTFOUND;
 622
 623         lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
 624         return lookup;
 625 }
 626
 627 /**
 628  * Look up a property in a node and check that it has a minimum length.
 629  *
 630  * @param blob          FDT blob
 631  * @param node          node to examine
 632  * @param prop_name     name of property to find
 633  * @param min_len       minimum property length in bytes
 634  * @param err           0 if ok, or -FDT_ERR_NOTFOUND if the property is not
 635                         found, or -FDT_ERR_BADLAYOUT if not enough data
 636  * @return pointer to cell, which is only valid if err == 0
 637  */
 638 static const void *get_prop_check_min_len(const void *blob, int node,
 639                 const char *prop_name, int min_len, int *err)
 640 {
 641         const void *cell;
 642         int len;
 643
 644         debug("%s: %s\n", __func__, prop_name);
 645         cell = fdt_getprop(blob, node, prop_name, &len);
 646         if (!cell)
 647                 *err = -FDT_ERR_NOTFOUND;
 648         else if (len < min_len)
 649                 *err = -FDT_ERR_BADLAYOUT;
 650         else
 651                 *err = 0;
 652         return cell;
 653 }
 654
 655 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
 656                 u32 *array, int count)
 657 {
 658         const u32 *cell;
 659         int i, err = 0;
 660
 661         debug("%s: %s\n", __func__, prop_name);
 662         cell = get_prop_check_min_len(blob, node, prop_name,
 663                                       sizeof(u32) * count, &err);
 664         if (!err) {
 665                 for (i = 0; i < count; i++)
 666                         array[i] = fdt32_to_cpu(cell[i]);
 667         }
 668         return err;
 669 }
 670
 671 int fdtdec_get_int_array_count(const void *blob, int node,
 672                                const char *prop_name, u32 *array, int count)
 673 {
 674         const u32 *cell;
 675         int len, elems;
 676         int i;
 677
 678         debug("%s: %s\n", __func__, prop_name);
 679         cell = fdt_getprop(blob, node, prop_name, &len);
 680         if (!cell)
 681                 return -FDT_ERR_NOTFOUND;
 682         elems = len / sizeof(u32);
 683         if (count > elems)
 684                 count = elems;
 685         for (i = 0; i < count; i++)
 686                 array[i] = fdt32_to_cpu(cell[i]);
 687
 688         return count;
 689 }
 690
 691 const u32 *fdtdec_locate_array(const void *blob, int node,
 692                                const char *prop_name, int count)
 693 {
 694         const u32 *cell;
 695         int err;
 696
 697         cell = get_prop_check_min_len(blob, node, prop_name,
 698                                       sizeof(u32) * count, &err);
 699         return err ? NULL : cell;
 700 }
 701
 702 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
 703 {
 704         const s32 *cell;
 705         int len;
 706
 707         debug("%s: %s\n", __func__, prop_name);
 708         cell = fdt_getprop(blob, node, prop_name, &len);
 709         return cell != NULL;
 710 }
 711
 712 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
 713                                    const char *list_name,
 714                                    const char *cells_name,
 715                                    int cell_count, int index,
 716                                    struct fdtdec_phandle_args *out_args)
 717 {
 718         const __be32 *list, *list_end;
 719         int rc = 0, size, cur_index = 0;
 720         uint32_t count = 0;
 721         int node = -1;
 722         int phandle;
 723
 724         /* Retrieve the phandle list property */
 725         list = fdt_getprop(blob, src_node, list_name, &size);
 726         if (!list)
 727                 return -ENOENT;
 728         list_end = list + size / sizeof(*list);
 729
 730         /* Loop over the phandles until all the requested entry is found */
 731         while (list < list_end) {
 732                 rc = -EINVAL;
 733                 count = 0;
 734
 735                 /*
 736                  * If phandle is 0, then it is an empty entry with no
 737                  * arguments.  Skip forward to the next entry.
 738                  */
 739                 phandle = be32_to_cpup(list++);
 740                 if (phandle) {
 741                         /*
 742                          * Find the provider node and parse the #*-cells
 743                          * property to determine the argument length.
 744                          *
 745                          * This is not needed if the cell count is hard-coded
 746                          * (i.e. cells_name not set, but cell_count is set),
 747                          * except when we're going to return the found node
 748                          * below.
 749                          */
 750                         if (cells_name || cur_index == index) {
 751                                 node = fdt_node_offset_by_phandle(blob,
 752                                                                   phandle);
 753                                 if (!node) {
 754                                         debug("%s: could not find phandle\n",
 755                                               fdt_get_name(blob, src_node,
 756                                                            NULL));
 757                                         goto err;
 758                                 }
 759                         }
 760
 761                         if (cells_name) {
 762                                 count = fdtdec_get_int(blob, node, cells_name,
 763                                                        -1);
 764                                 if (count == -1) {
 765                                         debug("%s: could not get %s for %s\n",
 766                                               fdt_get_name(blob, src_node,
 767                                                            NULL),
 768                                               cells_name,
 769                                               fdt_get_name(blob, node,
 770                                                            NULL));
 771                                         goto err;
 772                                 }
 773                         } else {
 774                                 count = cell_count;
 775                         }
 776
 777                         /*
 778                          * Make sure that the arguments actually fit in the
 779                          * remaining property data length
 780                          */
 781                         if (list + count > list_end) {
 782                                 debug("%s: arguments longer than property\n",
 783                                       fdt_get_name(blob, src_node, NULL));
 784                                 goto err;
 785                         }
 786                 }
 787
 788                 /*
 789                  * All of the error cases above bail out of the loop, so at
 790                  * this point, the parsing is successful. If the requested
 791                  * index matches, then fill the out_args structure and return,
 792                  * or return -ENOENT for an empty entry.
 793                  */
 794                 rc = -ENOENT;
 795                 if (cur_index == index) {
 796                         if (!phandle)
 797                                 goto err;
 798
 799                         if (out_args) {
 800                                 int i;
 801
 802                                 if (count > MAX_PHANDLE_ARGS) {
 803                                         debug("%s: too many arguments %d\n",
 804                                               fdt_get_name(blob, src_node,
 805                                                            NULL), count);
 806                                         count = MAX_PHANDLE_ARGS;
 807                                 }
 808                                 out_args->node = node;
 809                                 out_args->args_count = count;
 810                                 for (i = 0; i < count; i++) {
 811                                         out_args->args[i] =
 812                                                         be32_to_cpup(list++);
 813                                 }
 814                         }
 815
 816                         /* Found it! return success */
 817                         return 0;
 818                 }
 819
 820                 node = -1;
 821                 list += count;
 822                 cur_index++;
 823         }
 824
 825         /*
 826          * Result will be one of:
 827          * -ENOENT : index is for empty phandle
 828          * -EINVAL : parsing error on data
 829          * [1..n]  : Number of phandle (count mode; when index = -1)
 830          */
 831         rc = index < 0 ? cur_index : -ENOENT;
 832  err:
 833         return rc;
 834 }
 835
 836 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
 837                 u8 *array, int count)
 838 {
 839         const u8 *cell;
 840         int err;
 841
 842         cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
 843         if (!err)
 844                 memcpy(array, cell, count);
 845         return err;
 846 }
 847
 848 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
 849                              const char *prop_name, int count)
 850 {
 851         const u8 *cell;
 852         int err;
 853
 854         cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
 855         if (err)
 856                 return NULL;
 857         return cell;
 858 }
 859
 860 int fdtdec_get_config_int(const void *blob, const char *prop_name,
 861                 int default_val)
 862 {
 863         int config_node;
 864
 865         debug("%s: %s\n", __func__, prop_name);
 866         config_node = fdt_path_offset(blob, "/config");
 867         if (config_node < 0)
 868                 return default_val;
 869         return fdtdec_get_int(blob, config_node, prop_name, default_val);
 870 }
 871
 872 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
 873 {
 874         int config_node;
 875         const void *prop;
 876
 877         debug("%s: %s\n", __func__, prop_name);
 878         config_node = fdt_path_offset(blob, "/config");
 879         if (config_node < 0)
 880                 return 0;
 881         prop = fdt_get_property(blob, config_node, prop_name, NULL);
 882
 883         return prop != NULL;
 884 }
 885
 886 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
 887 {
 888         const char *nodep;
 889         int nodeoffset;
 890         int len;
 891
 892         debug("%s: %s\n", __func__, prop_name);
 893         nodeoffset = fdt_path_offset(blob, "/config");
 894         if (nodeoffset < 0)
 895                 return NULL;
 896
 897         nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
 898         if (!nodep)
 899                 return NULL;
 900
 901         return (char *)nodep;
 902 }
 903
 904 int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
 905                          fdt_addr_t *basep, fdt_size_t *sizep)
 906 {
 907         const fdt_addr_t *cell;
 908         int len;
 909
 910         debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
 911               prop_name);
 912         cell = fdt_getprop(blob, node, prop_name, &len);
 913         if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
 914                 debug("cell=%p, len=%d\n", cell, len);
 915                 return -1;
 916         }
 917
 918         *basep = fdt_addr_to_cpu(*cell);
 919         *sizep = fdt_size_to_cpu(cell[1]);
 920         debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
 921               (ulong)*sizep);
 922
 923         return 0;
 924 }
 925
 926 /**
 927  * Read a flash entry from the fdt
 928  *
 929  * @param blob          FDT blob
 930  * @param node          Offset of node to read
 931  * @param name          Name of node being read
 932  * @param entry         Place to put offset and size of this node
 933  * @return 0 if ok, -ve on error
 934  */
 935 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
 936                            struct fmap_entry *entry)
 937 {
 938         const char *prop;
 939         u32 reg[2];
 940
 941         if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
 942                 debug("Node '%s' has bad/missing 'reg' property\n", name);
 943                 return -FDT_ERR_NOTFOUND;
 944         }
 945         entry->offset = reg[0];
 946         entry->length = reg[1];
 947         entry->used = fdtdec_get_int(blob, node, "used", entry->length);
 948         prop = fdt_getprop(blob, node, "compress", NULL);
 949         entry->compress_algo = prop && !strcmp(prop, "lzo") ?
 950                 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
 951         prop = fdt_getprop(blob, node, "hash", &entry->hash_size);
 952         entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
 953         entry->hash = (uint8_t *)prop;
 954
 955         return 0;
 956 }
 957
 958 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
 959 {
 960         u64 number = 0;
 961
 962         while (cells--)
 963                 number = (number << 32) | fdt32_to_cpu(*ptr++);
 964
 965         return number;
 966 }
 967
 968 int fdt_get_resource(const void *fdt, int node, const char *property,
 969                      unsigned int index, struct fdt_resource *res)
 970 {
 971         const fdt32_t *ptr, *end;
 972         int na, ns, len, parent;
 973         unsigned int i = 0;
 974
 975         parent = fdt_parent_offset(fdt, node);
 976         if (parent < 0)
 977                 return parent;
 978
 979         na = fdt_address_cells(fdt, parent);
 980         ns = fdt_size_cells(fdt, parent);
 981
 982         ptr = fdt_getprop(fdt, node, property, &len);
 983         if (!ptr)
 984                 return len;
 985
 986         end = ptr + len / sizeof(*ptr);
 987
 988         while (ptr + na + ns <= end) {
 989                 if (i == index) {
 990                         res->start = res->end = fdtdec_get_number(ptr, na);
 991                         res->end += fdtdec_get_number(&ptr[na], ns) - 1;
 992                         return 0;
 993                 }
 994
 995                 ptr += na + ns;
 996                 i++;
 997         }
 998
 999         return -FDT_ERR_NOTFOUND;
1000 }
1001
1002 int fdt_get_named_resource(const void *fdt, int node, const char *property,
1003                            const char *prop_names, const char *name,
1004                            struct fdt_resource *res)
1005 {
1006         int index;
1007
1008         index = fdt_find_string(fdt, node, prop_names, name);
1009         if (index < 0)
1010                 return index;
1011
1012         return fdt_get_resource(fdt, node, property, index, res);
1013 }
1014
1015 int fdtdec_decode_memory_region(const void *blob, int config_node,
1016                                 const char *mem_type, const char *suffix,
1017                                 fdt_addr_t *basep, fdt_size_t *sizep)
1018 {
1019         char prop_name[50];
1020         const char *mem;
1021         fdt_size_t size, offset_size;
1022         fdt_addr_t base, offset;
1023         int node;
1024
1025         if (config_node == -1) {
1026                 config_node = fdt_path_offset(blob, "/config");
1027                 if (config_node < 0) {
1028                         debug("%s: Cannot find /config node\n", __func__);
1029                         return -ENOENT;
1030                 }
1031         }
1032         if (!suffix)
1033                 suffix = "";
1034
1035         snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
1036                  suffix);
1037         mem = fdt_getprop(blob, config_node, prop_name, NULL);
1038         if (!mem) {
1039                 debug("%s: No memory type for '%s', using /memory\n", __func__,
1040                       prop_name);
1041                 mem = "/memory";
1042         }
1043
1044         node = fdt_path_offset(blob, mem);
1045         if (node < 0) {
1046                 debug("%s: Failed to find node '%s': %s\n", __func__, mem,
1047                       fdt_strerror(node));
1048                 return -ENOENT;
1049         }
1050
1051         /*
1052          * Not strictly correct - the memory may have multiple banks. We just
1053          * use the first
1054          */
1055         if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
1056                 debug("%s: Failed to decode memory region %s\n", __func__,
1057                       mem);
1058                 return -EINVAL;
1059         }
1060
1061         snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
1062                  suffix);
1063         if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
1064                                  &offset_size)) {
1065                 debug("%s: Failed to decode memory region '%s'\n", __func__,
1066                       prop_name);
1067                 return -EINVAL;
1068         }
1069
1070         *basep = base + offset;
1071         *sizep = offset_size;
1072
1073         return 0;
1074 }
1075
1076 static int decode_timing_property(const void *blob, int node, const char *name,
1077                                   struct timing_entry *result)
1078 {
1079         int length, ret = 0;
1080         const u32 *prop;
1081
1082         prop = fdt_getprop(blob, node, name, &length);
1083         if (!prop) {
1084                 debug("%s: could not find property %s\n",
1085                       fdt_get_name(blob, node, NULL), name);
1086                 return length;
1087         }
1088
1089         if (length == sizeof(u32)) {
1090                 result->typ = fdtdec_get_int(blob, node, name, 0);
1091                 result->min = result->typ;
1092                 result->max = result->typ;
1093         } else {
1094                 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
1095         }
1096
1097         return ret;
1098 }
1099
1100 int fdtdec_decode_display_timing(const void *blob, int parent, int index,
1101                                  struct display_timing *dt)
1102 {
1103         int i, node, timings_node;
1104         u32 val = 0;
1105         int ret = 0;
1106
1107         timings_node = fdt_subnode_offset(blob, parent, "display-timings");
1108         if (timings_node < 0)
1109                 return timings_node;
1110
1111         for (i = 0, node = fdt_first_subnode(blob, timings_node);
1112              node > 0 && i != index;
1113              node = fdt_next_subnode(blob, node))
1114                 i++;
1115
1116         if (node < 0)
1117                 return node;
1118
1119         memset(dt, 0, sizeof(*dt));
1120
1121         ret |= decode_timing_property(blob, node, "hback-porch",
1122                                       &dt->hback_porch);
1123         ret |= decode_timing_property(blob, node, "hfront-porch",
1124                                       &dt->hfront_porch);
1125         ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
1126         ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
1127         ret |= decode_timing_property(blob, node, "vback-porch",
1128                                       &dt->vback_porch);
1129         ret |= decode_timing_property(blob, node, "vfront-porch",
1130                                       &dt->vfront_porch);
1131         ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
1132         ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
1133         ret |= decode_timing_property(blob, node, "clock-frequency",
1134                                       &dt->pixelclock);
1135
1136         dt->flags = 0;
1137         val = fdtdec_get_int(blob, node, "vsync-active", -1);
1138         if (val != -1) {
1139                 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1140                                 DISPLAY_FLAGS_VSYNC_LOW;
1141         }
1142         val = fdtdec_get_int(blob, node, "hsync-active", -1);
1143         if (val != -1) {
1144                 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1145                                 DISPLAY_FLAGS_HSYNC_LOW;
1146         }
1147         val = fdtdec_get_int(blob, node, "de-active", -1);
1148         if (val != -1) {
1149                 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1150                                 DISPLAY_FLAGS_DE_LOW;
1151         }
1152         val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1153         if (val != -1) {
1154                 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1155                                 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1156         }
1157
1158         if (fdtdec_get_bool(blob, node, "interlaced"))
1159                 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1160         if (fdtdec_get_bool(blob, node, "doublescan"))
1161                 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1162         if (fdtdec_get_bool(blob, node, "doubleclk"))
1163                 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1164
1165         return 0;
1166 }
1167
1168 int fdtdec_setup(void)
1169 {
1170 #if CONFIG_IS_ENABLED(OF_CONTROL)
1171 # ifdef CONFIG_OF_EMBED
1172         /* Get a pointer to the FDT */
1173         gd->fdt_blob = __dtb_dt_begin;
1174 # elif defined CONFIG_OF_SEPARATE
1175 #  ifdef CONFIG_SPL_BUILD
1176         /* FDT is at end of BSS unless it is in a different memory region */
1177         if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
1178                 gd->fdt_blob = (ulong *)&_image_binary_end;
1179         else
1180                 gd->fdt_blob = (ulong *)&__bss_end;
1181 #  else
1182         /* FDT is at end of image */
1183         gd->fdt_blob = (ulong *)&_end;
1184 #  endif
1185 # elif defined(CONFIG_OF_HOSTFILE)
1186         if (sandbox_read_fdt_from_file()) {
1187                 puts("Failed to read control FDT\n");
1188                 return -1;
1189         }
1190 # endif
1191 # ifndef CONFIG_SPL_BUILD
1192         /* Allow the early environment to override the fdt address */
1193         gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
1194                                                 (uintptr_t)gd->fdt_blob);
1195 # endif
1196 #endif
1197         return fdtdec_prepare_fdt();
1198 }
1199
1200 #endif /* !USE_HOSTCC */