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_SOR, "nvidia,tegra124-sor"),
  31         COMPAT(NVIDIA_TEGRA124_PMC, "nvidia,tegra124-pmc"),
  32         COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"),
  33         COMPAT(NVIDIA_TEGRA210_SDMMC, "nvidia,tegra210-sdhci"),
  34         COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"),
  35         COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"),
  36         COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"),
  37         COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"),
  38         COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"),
  39         COMPAT(SMSC_LAN9215, "smsc,lan9215"),
  40         COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
  41         COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),
  42         COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
  43         COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),
  44         COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"),
  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_FIMD, "samsung,exynos-fimd"),
  49         COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
  50         COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"),
  51         COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
  52         COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),
  53         COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"),
  54         COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"),
  55         COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
  56         COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
  57         COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
  58         COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
  59         COMPAT(INTEL_MICROCODE, "intel,microcode"),
  60         COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"),
  61         COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"),
  62         COMPAT(INTEL_GMA, "intel,gma"),
  63         COMPAT(AMS_AS3722, "ams,as3722"),
  64         COMPAT(INTEL_ICH_SPI, "intel,ich-spi"),
  65         COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
  66         COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"),
  67         COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"),
  68         COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"),
  69         COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"),
  70         COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"),
  71         COMPAT(COMPAT_INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
  72         COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
  73         COMPAT(COMPAT_INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"),
  74 };
  75
  76 const char *fdtdec_get_compatible(enum fdt_compat_id id)
  77 {
  78         /* We allow reading of the 'unknown' ID for testing purposes */
  79         assert(id >= 0 && id < COMPAT_COUNT);
  80         return compat_names[id];
  81 }
  82
  83 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node,
  84                 const char *prop_name, int index, int na, int ns,
  85                 fdt_size_t *sizep)
  86 {
  87         const fdt32_t *prop, *prop_end;
  88         const fdt32_t *prop_addr, *prop_size, *prop_after_size;
  89         int len;
  90         fdt_addr_t addr;
  91
  92         debug("%s: %s: ", __func__, prop_name);
  93
  94         if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) {
  95                 debug("(na too large for fdt_addr_t type)\n");
  96                 return FDT_ADDR_T_NONE;
  97         }
  98
  99         if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) {
 100                 debug("(ns too large for fdt_size_t type)\n");
 101                 return FDT_ADDR_T_NONE;
 102         }
 103
 104         prop = fdt_getprop(blob, node, prop_name, &len);
 105         if (!prop) {
 106                 debug("(not found)\n");
 107                 return FDT_ADDR_T_NONE;
 108         }
 109         prop_end = prop + (len / sizeof(*prop));
 110
 111         prop_addr = prop + (index * (na + ns));
 112         prop_size = prop_addr + na;
 113         prop_after_size = prop_size + ns;
 114         if (prop_after_size > prop_end) {
 115                 debug("(not enough data: expected >= %d cells, got %d cells)\n",
 116                       (u32)(prop_after_size - prop), ((u32)(prop_end - prop)));
 117                 return FDT_ADDR_T_NONE;
 118         }
 119
 120         addr = fdtdec_get_number(prop_addr, na);
 121
 122         if (sizep) {
 123                 *sizep = fdtdec_get_number(prop_size, ns);
 124                 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr,
 125                       (unsigned long long)*sizep);
 126         } else {
 127                 debug("addr=%08llx\n", (unsigned long long)addr);
 128         }
 129
 130         return addr;
 131 }
 132
 133 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent,
 134                 int node, const char *prop_name, int index, fdt_size_t *sizep)
 135 {
 136         int na, ns;
 137
 138         debug("%s: ", __func__);
 139
 140         na = fdt_address_cells(blob, parent);
 141         if (na < 1) {
 142                 debug("(bad #address-cells)\n");
 143                 return FDT_ADDR_T_NONE;
 144         }
 145
 146         ns = fdt_size_cells(blob, parent);
 147         if (ns < 0) {
 148                 debug("(bad #size-cells)\n");
 149                 return FDT_ADDR_T_NONE;
 150         }
 151
 152         debug("na=%d, ns=%d, ", na, ns);
 153
 154         return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na,
 155                                           ns, sizep);
 156 }
 157
 158 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node,
 159                 const char *prop_name, int index, fdt_size_t *sizep)
 160 {
 161         int parent;
 162
 163         debug("%s: ", __func__);
 164
 165         parent = fdt_parent_offset(blob, node);
 166         if (parent < 0) {
 167                 debug("(no parent found)\n");
 168                 return FDT_ADDR_T_NONE;
 169         }
 170
 171         return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name,
 172                                                 index, sizep);
 173 }
 174
 175 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
 176                 const char *prop_name, fdt_size_t *sizep)
 177 {
 178         int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0;
 179
 180         return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0,
 181                                           sizeof(fdt_addr_t) / sizeof(fdt32_t),
 182                                           ns, sizep);
 183 }
 184
 185 fdt_addr_t fdtdec_get_addr(const void *blob, int node,
 186                 const char *prop_name)
 187 {
 188         return fdtdec_get_addr_size(blob, node, prop_name, NULL);
 189 }
 190
 191 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)
 192 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
 193                 const char *prop_name, struct fdt_pci_addr *addr)
 194 {
 195         const u32 *cell;
 196         int len;
 197         int ret = -ENOENT;
 198
 199         debug("%s: %s: ", __func__, prop_name);
 200
 201         /*
 202          * If we follow the pci bus bindings strictly, we should check
 203          * the value of the node's parent node's #address-cells and
 204          * #size-cells. They need to be 3 and 2 accordingly. However,
 205          * for simplicity we skip the check here.
 206          */
 207         cell = fdt_getprop(blob, node, prop_name, &len);
 208         if (!cell)
 209                 goto fail;
 210
 211         if ((len % FDT_PCI_REG_SIZE) == 0) {
 212                 int num = len / FDT_PCI_REG_SIZE;
 213                 int i;
 214
 215                 for (i = 0; i < num; i++) {
 216                         debug("pci address #%d: %08lx %08lx %08lx\n", i,
 217                               (ulong)fdt32_to_cpu(cell[0]),
 218                               (ulong)fdt32_to_cpu(cell[1]),
 219                               (ulong)fdt32_to_cpu(cell[2]));
 220                         if ((fdt32_to_cpu(*cell) & type) == type) {
 221                                 addr->phys_hi = fdt32_to_cpu(cell[0]);
 222                                 addr->phys_mid = fdt32_to_cpu(cell[1]);
 223                                 addr->phys_lo = fdt32_to_cpu(cell[1]);
 224                                 break;
 225                         } else {
 226                                 cell += (FDT_PCI_ADDR_CELLS +
 227                                          FDT_PCI_SIZE_CELLS);
 228                         }
 229                 }
 230
 231                 if (i == num) {
 232                         ret = -ENXIO;
 233                         goto fail;
 234                 }
 235
 236                 return 0;
 237         } else {
 238                 ret = -EINVAL;
 239         }
 240
 241 fail:
 242         debug("(not found)\n");
 243         return ret;
 244 }
 245
 246 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
 247 {
 248         const char *list, *end;
 249         int len;
 250
 251         list = fdt_getprop(blob, node, "compatible", &len);
 252         if (!list)
 253                 return -ENOENT;
 254
 255         end = list + len;
 256         while (list < end) {
 257                 char *s;
 258
 259                 len = strlen(list);
 260                 if (len >= strlen("pciVVVV,DDDD")) {
 261                         s = strstr(list, "pci");
 262
 263                         /*
 264                          * check if the string is something like pciVVVV,DDDD.RR
 265                          * or just pciVVVV,DDDD
 266                          */
 267                         if (s && s[7] == ',' &&
 268                             (s[12] == '.' || s[12] == 0)) {
 269                                 s += 3;
 270                                 *vendor = simple_strtol(s, NULL, 16);
 271
 272                                 s += 5;
 273                                 *device = simple_strtol(s, NULL, 16);
 274
 275                                 return 0;
 276                         }
 277                 }
 278                 list += (len + 1);
 279         }
 280
 281         return -ENOENT;
 282 }
 283
 284 int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr,
 285                          u32 *bar)
 286 {
 287         int barnum;
 288
 289         /* extract the bar number from fdt_pci_addr */
 290         barnum = addr->phys_hi & 0xff;
 291         if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
 292                 return -EINVAL;
 293
 294         barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
 295         *bar = dm_pci_read_bar32(dev, barnum);
 296
 297         return 0;
 298 }
 299 #endif
 300
 301 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
 302                 uint64_t default_val)
 303 {
 304         const uint64_t *cell64;
 305         int length;
 306
 307         cell64 = fdt_getprop(blob, node, prop_name, &length);
 308         if (!cell64 || length < sizeof(*cell64))
 309                 return default_val;
 310
 311         return fdt64_to_cpu(*cell64);
 312 }
 313
 314 int fdtdec_get_is_enabled(const void *blob, int node)
 315 {
 316         const char *cell;
 317
 318         /*
 319          * It should say "okay", so only allow that. Some fdts use "ok" but
 320          * this is a bug. Please fix your device tree source file. See here
 321          * for discussion:
 322          *
 323          * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
 324          */
 325         cell = fdt_getprop(blob, node, "status", NULL);
 326         if (cell)
 327                 return 0 == strcmp(cell, "okay");
 328         return 1;
 329 }
 330
 331 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
 332 {
 333         enum fdt_compat_id id;
 334
 335         /* Search our drivers */
 336         for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
 337                 if (0 == fdt_node_check_compatible(blob, node,
 338                                 compat_names[id]))
 339                         return id;
 340         return COMPAT_UNKNOWN;
 341 }
 342
 343 int fdtdec_next_compatible(const void *blob, int node,
 344                 enum fdt_compat_id id)
 345 {
 346         return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
 347 }
 348
 349 int fdtdec_next_compatible_subnode(const void *blob, int node,
 350                 enum fdt_compat_id id, int *depthp)
 351 {
 352         do {
 353                 node = fdt_next_node(blob, node, depthp);
 354         } while (*depthp > 1);
 355
 356         /* If this is a direct subnode, and compatible, return it */
 357         if (*depthp == 1 && 0 == fdt_node_check_compatible(
 358                                                 blob, node, compat_names[id]))
 359                 return node;
 360
 361         return -FDT_ERR_NOTFOUND;
 362 }
 363
 364 int fdtdec_next_alias(const void *blob, const char *name,
 365                 enum fdt_compat_id id, int *upto)
 366 {
 367 #define MAX_STR_LEN 20
 368         char str[MAX_STR_LEN + 20];
 369         int node, err;
 370
 371         /* snprintf() is not available */
 372         assert(strlen(name) < MAX_STR_LEN);
 373         sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
 374         node = fdt_path_offset(blob, str);
 375         if (node < 0)
 376                 return node;
 377         err = fdt_node_check_compatible(blob, node, compat_names[id]);
 378         if (err < 0)
 379                 return err;
 380         if (err)
 381                 return -FDT_ERR_NOTFOUND;
 382         (*upto)++;
 383         return node;
 384 }
 385
 386 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
 387                         enum fdt_compat_id id, int *node_list, int maxcount)
 388 {
 389         memset(node_list, '\0', sizeof(*node_list) * maxcount);
 390
 391         return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
 392 }
 393
 394 /* TODO: Can we tighten this code up a little? */
 395 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
 396                         enum fdt_compat_id id, int *node_list, int maxcount)
 397 {
 398         int name_len = strlen(name);
 399         int nodes[maxcount];
 400         int num_found = 0;
 401         int offset, node;
 402         int alias_node;
 403         int count;
 404         int i, j;
 405
 406         /* find the alias node if present */
 407         alias_node = fdt_path_offset(blob, "/aliases");
 408
 409         /*
 410          * start with nothing, and we can assume that the root node can't
 411          * match
 412          */
 413         memset(nodes, '\0', sizeof(nodes));
 414
 415         /* First find all the compatible nodes */
 416         for (node = count = 0; node >= 0 && count < maxcount;) {
 417                 node = fdtdec_next_compatible(blob, node, id);
 418                 if (node >= 0)
 419                         nodes[count++] = node;
 420         }
 421         if (node >= 0)
 422                 debug("%s: warning: maxcount exceeded with alias '%s'\n",
 423                        __func__, name);
 424
 425         /* Now find all the aliases */
 426         for (offset = fdt_first_property_offset(blob, alias_node);
 427                         offset > 0;
 428                         offset = fdt_next_property_offset(blob, offset)) {
 429                 const struct fdt_property *prop;
 430                 const char *path;
 431                 int number;
 432                 int found;
 433
 434                 node = 0;
 435                 prop = fdt_get_property_by_offset(blob, offset, NULL);
 436                 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
 437                 if (prop->len && 0 == strncmp(path, name, name_len))
 438                         node = fdt_path_offset(blob, prop->data);
 439                 if (node <= 0)
 440                         continue;
 441
 442                 /* Get the alias number */
 443                 number = simple_strtoul(path + name_len, NULL, 10);
 444                 if (number < 0 || number >= maxcount) {
 445                         debug("%s: warning: alias '%s' is out of range\n",
 446                                __func__, path);
 447                         continue;
 448                 }
 449
 450                 /* Make sure the node we found is actually in our list! */
 451                 found = -1;
 452                 for (j = 0; j < count; j++)
 453                         if (nodes[j] == node) {
 454                                 found = j;
 455                                 break;
 456                         }
 457
 458                 if (found == -1) {
 459                         debug("%s: warning: alias '%s' points to a node "
 460                                 "'%s' that is missing or is not compatible "
 461                                 " with '%s'\n", __func__, path,
 462                                 fdt_get_name(blob, node, NULL),
 463                                compat_names[id]);
 464                         continue;
 465                 }
 466
 467                 /*
 468                  * Add this node to our list in the right place, and mark
 469                  * it as done.
 470                  */
 471                 if (fdtdec_get_is_enabled(blob, node)) {
 472                         if (node_list[number]) {
 473                                 debug("%s: warning: alias '%s' requires that "
 474                                       "a node be placed in the list in a "
 475                                       "position which is already filled by "
 476                                       "node '%s'\n", __func__, path,
 477                                       fdt_get_name(blob, node, NULL));
 478                                 continue;
 479                         }
 480                         node_list[number] = node;
 481                         if (number >= num_found)
 482                                 num_found = number + 1;
 483                 }
 484                 nodes[found] = 0;
 485         }
 486
 487         /* Add any nodes not mentioned by an alias */
 488         for (i = j = 0; i < maxcount; i++) {
 489                 if (!node_list[i]) {
 490                         for (; j < maxcount; j++)
 491                                 if (nodes[j] &&
 492                                         fdtdec_get_is_enabled(blob, nodes[j]))
 493                                         break;
 494
 495                         /* Have we run out of nodes to add? */
 496                         if (j == maxcount)
 497                                 break;
 498
 499                         assert(!node_list[i]);
 500                         node_list[i] = nodes[j++];
 501                         if (i >= num_found)
 502                                 num_found = i + 1;
 503                 }
 504         }
 505
 506         return num_found;
 507 }
 508
 509 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
 510                          int *seqp)
 511 {
 512         int base_len = strlen(base);
 513         const char *find_name;
 514         int find_namelen;
 515         int prop_offset;
 516         int aliases;
 517
 518         find_name = fdt_get_name(blob, offset, &find_namelen);
 519         debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
 520
 521         aliases = fdt_path_offset(blob, "/aliases");
 522         for (prop_offset = fdt_first_property_offset(blob, aliases);
 523              prop_offset > 0;
 524              prop_offset = fdt_next_property_offset(blob, prop_offset)) {
 525                 const char *prop;
 526                 const char *name;
 527                 const char *slash;
 528                 int len, val;
 529
 530                 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
 531                 debug("   - %s, %s\n", name, prop);
 532                 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
 533                     strncmp(name, base, base_len))
 534                         continue;
 535
 536                 slash = strrchr(prop, '/');
 537                 if (strcmp(slash + 1, find_name))
 538                         continue;
 539                 val = trailing_strtol(name);
 540                 if (val != -1) {
 541                         *seqp = val;
 542                         debug("Found seq %d\n", *seqp);
 543                         return 0;
 544                 }
 545         }
 546
 547         debug("Not found\n");
 548         return -ENOENT;
 549 }
 550
 551 const char *fdtdec_get_chosen_prop(const void *blob, const char *name)
 552 {
 553         int chosen_node;
 554
 555         if (!blob)
 556                 return NULL;
 557         chosen_node = fdt_path_offset(blob, "/chosen");
 558         return fdt_getprop(blob, chosen_node, name, NULL);
 559 }
 560
 561 int fdtdec_get_chosen_node(const void *blob, const char *name)
 562 {
 563         const char *prop;
 564
 565         prop = fdtdec_get_chosen_prop(blob, name);
 566         if (!prop)
 567                 return -FDT_ERR_NOTFOUND;
 568         return fdt_path_offset(blob, prop);
 569 }
 570
 571 int fdtdec_check_fdt(void)
 572 {
 573         /*
 574          * We must have an FDT, but we cannot panic() yet since the console
 575          * is not ready. So for now, just assert(). Boards which need an early
 576          * FDT (prior to console ready) will need to make their own
 577          * arrangements and do their own checks.
 578          */
 579         assert(!fdtdec_prepare_fdt());
 580         return 0;
 581 }
 582
 583 /*
 584  * This function is a little odd in that it accesses global data. At some
 585  * point if the architecture board.c files merge this will make more sense.
 586  * Even now, it is common code.
 587  */
 588 int fdtdec_prepare_fdt(void)
 589 {
 590         if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
 591             fdt_check_header(gd->fdt_blob)) {
 592 #ifdef CONFIG_SPL_BUILD
 593                 puts("Missing DTB\n");
 594 #else
 595                 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");
 596 # ifdef DEBUG
 597                 if (gd->fdt_blob) {
 598                         printf("fdt_blob=%p\n", gd->fdt_blob);
 599                         print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
 600                                      32, 0);
 601                 }
 602 # endif
 603 #endif
 604                 return -1;
 605         }
 606         return 0;
 607 }
 608
 609 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
 610 {
 611         const u32 *phandle;
 612         int lookup;
 613
 614         debug("%s: %s\n", __func__, prop_name);
 615         phandle = fdt_getprop(blob, node, prop_name, NULL);
 616         if (!phandle)
 617                 return -FDT_ERR_NOTFOUND;
 618
 619         lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
 620         return lookup;
 621 }
 622
 623 /**
 624  * Look up a property in a node and check that it has a minimum length.
 625  *
 626  * @param blob          FDT blob
 627  * @param node          node to examine
 628  * @param prop_name     name of property to find
 629  * @param min_len       minimum property length in bytes
 630  * @param err           0 if ok, or -FDT_ERR_NOTFOUND if the property is not
 631                         found, or -FDT_ERR_BADLAYOUT if not enough data
 632  * @return pointer to cell, which is only valid if err == 0
 633  */
 634 static const void *get_prop_check_min_len(const void *blob, int node,
 635                 const char *prop_name, int min_len, int *err)
 636 {
 637         const void *cell;
 638         int len;
 639
 640         debug("%s: %s\n", __func__, prop_name);
 641         cell = fdt_getprop(blob, node, prop_name, &len);
 642         if (!cell)
 643                 *err = -FDT_ERR_NOTFOUND;
 644         else if (len < min_len)
 645                 *err = -FDT_ERR_BADLAYOUT;
 646         else
 647                 *err = 0;
 648         return cell;
 649 }
 650
 651 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
 652                 u32 *array, int count)
 653 {
 654         const u32 *cell;
 655         int i, err = 0;
 656
 657         debug("%s: %s\n", __func__, prop_name);
 658         cell = get_prop_check_min_len(blob, node, prop_name,
 659                                       sizeof(u32) * count, &err);
 660         if (!err) {
 661                 for (i = 0; i < count; i++)
 662                         array[i] = fdt32_to_cpu(cell[i]);
 663         }
 664         return err;
 665 }
 666
 667 int fdtdec_get_int_array_count(const void *blob, int node,
 668                                const char *prop_name, u32 *array, int count)
 669 {
 670         const u32 *cell;
 671         int len, elems;
 672         int i;
 673
 674         debug("%s: %s\n", __func__, prop_name);
 675         cell = fdt_getprop(blob, node, prop_name, &len);
 676         if (!cell)
 677                 return -FDT_ERR_NOTFOUND;
 678         elems = len / sizeof(u32);
 679         if (count > elems)
 680                 count = elems;
 681         for (i = 0; i < count; i++)
 682                 array[i] = fdt32_to_cpu(cell[i]);
 683
 684         return count;
 685 }
 686
 687 const u32 *fdtdec_locate_array(const void *blob, int node,
 688                                const char *prop_name, int count)
 689 {
 690         const u32 *cell;
 691         int err;
 692
 693         cell = get_prop_check_min_len(blob, node, prop_name,
 694                                       sizeof(u32) * count, &err);
 695         return err ? NULL : cell;
 696 }
 697
 698 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
 699 {
 700         const s32 *cell;
 701         int len;
 702
 703         debug("%s: %s\n", __func__, prop_name);
 704         cell = fdt_getprop(blob, node, prop_name, &len);
 705         return cell != NULL;
 706 }
 707
 708 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
 709                                    const char *list_name,
 710                                    const char *cells_name,
 711                                    int cell_count, int index,
 712                                    struct fdtdec_phandle_args *out_args)
 713 {
 714         const __be32 *list, *list_end;
 715         int rc = 0, size, cur_index = 0;
 716         uint32_t count = 0;
 717         int node = -1;
 718         int phandle;
 719
 720         /* Retrieve the phandle list property */
 721         list = fdt_getprop(blob, src_node, list_name, &size);
 722         if (!list)
 723                 return -ENOENT;
 724         list_end = list + size / sizeof(*list);
 725
 726         /* Loop over the phandles until all the requested entry is found */
 727         while (list < list_end) {
 728                 rc = -EINVAL;
 729                 count = 0;
 730
 731                 /*
 732                  * If phandle is 0, then it is an empty entry with no
 733                  * arguments.  Skip forward to the next entry.
 734                  */
 735                 phandle = be32_to_cpup(list++);
 736                 if (phandle) {
 737                         /*
 738                          * Find the provider node and parse the #*-cells
 739                          * property to determine the argument length.
 740                          *
 741                          * This is not needed if the cell count is hard-coded
 742                          * (i.e. cells_name not set, but cell_count is set),
 743                          * except when we're going to return the found node
 744                          * below.
 745                          */
 746                         if (cells_name || cur_index == index) {
 747                                 node = fdt_node_offset_by_phandle(blob,
 748                                                                   phandle);
 749                                 if (!node) {
 750                                         debug("%s: could not find phandle\n",
 751                                               fdt_get_name(blob, src_node,
 752                                                            NULL));
 753                                         goto err;
 754                                 }
 755                         }
 756
 757                         if (cells_name) {
 758                                 count = fdtdec_get_int(blob, node, cells_name,
 759                                                        -1);
 760                                 if (count == -1) {
 761                                         debug("%s: could not get %s for %s\n",
 762                                               fdt_get_name(blob, src_node,
 763                                                            NULL),
 764                                               cells_name,
 765                                               fdt_get_name(blob, node,
 766                                                            NULL));
 767                                         goto err;
 768                                 }
 769                         } else {
 770                                 count = cell_count;
 771                         }
 772
 773                         /*
 774                          * Make sure that the arguments actually fit in the
 775                          * remaining property data length
 776                          */
 777                         if (list + count > list_end) {
 778                                 debug("%s: arguments longer than property\n",
 779                                       fdt_get_name(blob, src_node, NULL));
 780                                 goto err;
 781                         }
 782                 }
 783
 784                 /*
 785                  * All of the error cases above bail out of the loop, so at
 786                  * this point, the parsing is successful. If the requested
 787                  * index matches, then fill the out_args structure and return,
 788                  * or return -ENOENT for an empty entry.
 789                  */
 790                 rc = -ENOENT;
 791                 if (cur_index == index) {
 792                         if (!phandle)
 793                                 goto err;
 794
 795                         if (out_args) {
 796                                 int i;
 797
 798                                 if (count > MAX_PHANDLE_ARGS) {
 799                                         debug("%s: too many arguments %d\n",
 800                                               fdt_get_name(blob, src_node,
 801                                                            NULL), count);
 802                                         count = MAX_PHANDLE_ARGS;
 803                                 }
 804                                 out_args->node = node;
 805                                 out_args->args_count = count;
 806                                 for (i = 0; i < count; i++) {
 807                                         out_args->args[i] =
 808                                                         be32_to_cpup(list++);
 809                                 }
 810                         }
 811
 812                         /* Found it! return success */
 813                         return 0;
 814                 }
 815
 816                 node = -1;
 817                 list += count;
 818                 cur_index++;
 819         }
 820
 821         /*
 822          * Result will be one of:
 823          * -ENOENT : index is for empty phandle
 824          * -EINVAL : parsing error on data
 825          * [1..n]  : Number of phandle (count mode; when index = -1)
 826          */
 827         rc = index < 0 ? cur_index : -ENOENT;
 828  err:
 829         return rc;
 830 }
 831
 832 int fdtdec_get_child_count(const void *blob, int node)
 833 {
 834         int subnode;
 835         int num = 0;
 836
 837         fdt_for_each_subnode(blob, subnode, node)
 838                 num++;
 839
 840         return num;
 841 }
 842
 843 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
 844                 u8 *array, int count)
 845 {
 846         const u8 *cell;
 847         int err;
 848
 849         cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
 850         if (!err)
 851                 memcpy(array, cell, count);
 852         return err;
 853 }
 854
 855 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
 856                              const char *prop_name, int count)
 857 {
 858         const u8 *cell;
 859         int err;
 860
 861         cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
 862         if (err)
 863                 return NULL;
 864         return cell;
 865 }
 866
 867 int fdtdec_get_config_int(const void *blob, const char *prop_name,
 868                 int default_val)
 869 {
 870         int config_node;
 871
 872         debug("%s: %s\n", __func__, prop_name);
 873         config_node = fdt_path_offset(blob, "/config");
 874         if (config_node < 0)
 875                 return default_val;
 876         return fdtdec_get_int(blob, config_node, prop_name, default_val);
 877 }
 878
 879 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
 880 {
 881         int config_node;
 882         const void *prop;
 883
 884         debug("%s: %s\n", __func__, prop_name);
 885         config_node = fdt_path_offset(blob, "/config");
 886         if (config_node < 0)
 887                 return 0;
 888         prop = fdt_get_property(blob, config_node, prop_name, NULL);
 889
 890         return prop != NULL;
 891 }
 892
 893 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
 894 {
 895         const char *nodep;
 896         int nodeoffset;
 897         int len;
 898
 899         debug("%s: %s\n", __func__, prop_name);
 900         nodeoffset = fdt_path_offset(blob, "/config");
 901         if (nodeoffset < 0)
 902                 return NULL;
 903
 904         nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
 905         if (!nodep)
 906                 return NULL;
 907
 908         return (char *)nodep;
 909 }
 910
 911 int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
 912                          fdt_addr_t *basep, fdt_size_t *sizep)
 913 {
 914         const fdt_addr_t *cell;
 915         int len;
 916
 917         debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
 918               prop_name);
 919         cell = fdt_getprop(blob, node, prop_name, &len);
 920         if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
 921                 debug("cell=%p, len=%d\n", cell, len);
 922                 return -1;
 923         }
 924
 925         *basep = fdt_addr_to_cpu(*cell);
 926         *sizep = fdt_size_to_cpu(cell[1]);
 927         debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
 928               (ulong)*sizep);
 929
 930         return 0;
 931 }
 932
 933 /**
 934  * Read a flash entry from the fdt
 935  *
 936  * @param blob          FDT blob
 937  * @param node          Offset of node to read
 938  * @param name          Name of node being read
 939  * @param entry         Place to put offset and size of this node
 940  * @return 0 if ok, -ve on error
 941  */
 942 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
 943                            struct fmap_entry *entry)
 944 {
 945         const char *prop;
 946         u32 reg[2];
 947
 948         if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
 949                 debug("Node '%s' has bad/missing 'reg' property\n", name);
 950                 return -FDT_ERR_NOTFOUND;
 951         }
 952         entry->offset = reg[0];
 953         entry->length = reg[1];
 954         entry->used = fdtdec_get_int(blob, node, "used", entry->length);
 955         prop = fdt_getprop(blob, node, "compress", NULL);
 956         entry->compress_algo = prop && !strcmp(prop, "lzo") ?
 957                 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
 958         prop = fdt_getprop(blob, node, "hash", &entry->hash_size);
 959         entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
 960         entry->hash = (uint8_t *)prop;
 961
 962         return 0;
 963 }
 964
 965 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
 966 {
 967         u64 number = 0;
 968
 969         while (cells--)
 970                 number = (number << 32) | fdt32_to_cpu(*ptr++);
 971
 972         return number;
 973 }
 974
 975 int fdt_get_resource(const void *fdt, int node, const char *property,
 976                      unsigned int index, struct fdt_resource *res)
 977 {
 978         const fdt32_t *ptr, *end;
 979         int na, ns, len, parent;
 980         unsigned int i = 0;
 981
 982         parent = fdt_parent_offset(fdt, node);
 983         if (parent < 0)
 984                 return parent;
 985
 986         na = fdt_address_cells(fdt, parent);
 987         ns = fdt_size_cells(fdt, parent);
 988
 989         ptr = fdt_getprop(fdt, node, property, &len);
 990         if (!ptr)
 991                 return len;
 992
 993         end = ptr + len / sizeof(*ptr);
 994
 995         while (ptr + na + ns <= end) {
 996                 if (i == index) {
 997                         res->start = res->end = fdtdec_get_number(ptr, na);
 998                         res->end += fdtdec_get_number(&ptr[na], ns) - 1;
 999                         return 0;
1000                 }
1001
1002                 ptr += na + ns;
1003                 i++;
1004         }
1005
1006         return -FDT_ERR_NOTFOUND;
1007 }
1008
1009 int fdt_get_named_resource(const void *fdt, int node, const char *property,
1010                            const char *prop_names, const char *name,
1011                            struct fdt_resource *res)
1012 {
1013         int index;
1014
1015         index = fdt_find_string(fdt, node, prop_names, name);
1016         if (index < 0)
1017                 return index;
1018
1019         return fdt_get_resource(fdt, node, property, index, res);
1020 }
1021
1022 int fdtdec_decode_memory_region(const void *blob, int config_node,
1023                                 const char *mem_type, const char *suffix,
1024                                 fdt_addr_t *basep, fdt_size_t *sizep)
1025 {
1026         char prop_name[50];
1027         const char *mem;
1028         fdt_size_t size, offset_size;
1029         fdt_addr_t base, offset;
1030         int node;
1031
1032         if (config_node == -1) {
1033                 config_node = fdt_path_offset(blob, "/config");
1034                 if (config_node < 0) {
1035                         debug("%s: Cannot find /config node\n", __func__);
1036                         return -ENOENT;
1037                 }
1038         }
1039         if (!suffix)
1040                 suffix = "";
1041
1042         snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
1043                  suffix);
1044         mem = fdt_getprop(blob, config_node, prop_name, NULL);
1045         if (!mem) {
1046                 debug("%s: No memory type for '%s', using /memory\n", __func__,
1047                       prop_name);
1048                 mem = "/memory";
1049         }
1050
1051         node = fdt_path_offset(blob, mem);
1052         if (node < 0) {
1053                 debug("%s: Failed to find node '%s': %s\n", __func__, mem,
1054                       fdt_strerror(node));
1055                 return -ENOENT;
1056         }
1057
1058         /*
1059          * Not strictly correct - the memory may have multiple banks. We just
1060          * use the first
1061          */
1062         if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
1063                 debug("%s: Failed to decode memory region %s\n", __func__,
1064                       mem);
1065                 return -EINVAL;
1066         }
1067
1068         snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
1069                  suffix);
1070         if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
1071                                  &offset_size)) {
1072                 debug("%s: Failed to decode memory region '%s'\n", __func__,
1073                       prop_name);
1074                 return -EINVAL;
1075         }
1076
1077         *basep = base + offset;
1078         *sizep = offset_size;
1079
1080         return 0;
1081 }
1082
1083 static int decode_timing_property(const void *blob, int node, const char *name,
1084                                   struct timing_entry *result)
1085 {
1086         int length, ret = 0;
1087         const u32 *prop;
1088
1089         prop = fdt_getprop(blob, node, name, &length);
1090         if (!prop) {
1091                 debug("%s: could not find property %s\n",
1092                       fdt_get_name(blob, node, NULL), name);
1093                 return length;
1094         }
1095
1096         if (length == sizeof(u32)) {
1097                 result->typ = fdtdec_get_int(blob, node, name, 0);
1098                 result->min = result->typ;
1099                 result->max = result->typ;
1100         } else {
1101                 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
1102         }
1103
1104         return ret;
1105 }
1106
1107 int fdtdec_decode_display_timing(const void *blob, int parent, int index,
1108                                  struct display_timing *dt)
1109 {
1110         int i, node, timings_node;
1111         u32 val = 0;
1112         int ret = 0;
1113
1114         timings_node = fdt_subnode_offset(blob, parent, "display-timings");
1115         if (timings_node < 0)
1116                 return timings_node;
1117
1118         for (i = 0, node = fdt_first_subnode(blob, timings_node);
1119              node > 0 && i != index;
1120              node = fdt_next_subnode(blob, node))
1121                 i++;
1122
1123         if (node < 0)
1124                 return node;
1125
1126         memset(dt, 0, sizeof(*dt));
1127
1128         ret |= decode_timing_property(blob, node, "hback-porch",
1129                                       &dt->hback_porch);
1130         ret |= decode_timing_property(blob, node, "hfront-porch",
1131                                       &dt->hfront_porch);
1132         ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
1133         ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
1134         ret |= decode_timing_property(blob, node, "vback-porch",
1135                                       &dt->vback_porch);
1136         ret |= decode_timing_property(blob, node, "vfront-porch",
1137                                       &dt->vfront_porch);
1138         ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
1139         ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
1140         ret |= decode_timing_property(blob, node, "clock-frequency",
1141                                       &dt->pixelclock);
1142
1143         dt->flags = 0;
1144         val = fdtdec_get_int(blob, node, "vsync-active", -1);
1145         if (val != -1) {
1146                 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1147                                 DISPLAY_FLAGS_VSYNC_LOW;
1148         }
1149         val = fdtdec_get_int(blob, node, "hsync-active", -1);
1150         if (val != -1) {
1151                 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1152                                 DISPLAY_FLAGS_HSYNC_LOW;
1153         }
1154         val = fdtdec_get_int(blob, node, "de-active", -1);
1155         if (val != -1) {
1156                 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1157                                 DISPLAY_FLAGS_DE_LOW;
1158         }
1159         val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1160         if (val != -1) {
1161                 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1162                                 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1163         }
1164
1165         if (fdtdec_get_bool(blob, node, "interlaced"))
1166                 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1167         if (fdtdec_get_bool(blob, node, "doublescan"))
1168                 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1169         if (fdtdec_get_bool(blob, node, "doubleclk"))
1170                 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1171
1172         return 0;
1173 }
1174
1175 int fdtdec_setup(void)
1176 {
1177 #if CONFIG_IS_ENABLED(OF_CONTROL)
1178 # ifdef CONFIG_OF_EMBED
1179         /* Get a pointer to the FDT */
1180         gd->fdt_blob = __dtb_dt_begin;
1181 # elif defined CONFIG_OF_SEPARATE
1182 #  ifdef CONFIG_SPL_BUILD
1183         /* FDT is at end of BSS unless it is in a different memory region */
1184         if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
1185                 gd->fdt_blob = (ulong *)&_image_binary_end;
1186         else
1187                 gd->fdt_blob = (ulong *)&__bss_end;
1188 #  else
1189         /* FDT is at end of image */
1190         gd->fdt_blob = (ulong *)&_end;
1191 #  endif
1192 # elif defined(CONFIG_OF_HOSTFILE)
1193         if (sandbox_read_fdt_from_file()) {
1194                 puts("Failed to read control FDT\n");
1195                 return -1;
1196         }
1197 # endif
1198 # ifndef CONFIG_SPL_BUILD
1199         /* Allow the early environment to override the fdt address */
1200         gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
1201                                                 (uintptr_t)gd->fdt_blob);
1202 # endif
1203 #endif
1204         return fdtdec_prepare_fdt();
1205 }
1206
1207 #endif /* !USE_HOSTCC */