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 <boot_fit.h>
   8 #include <common.h>
   9 #include <dm.h>
  10 #include <errno.h>
  11 #include <serial.h>
  12 #include <libfdt.h>
  13 #include <fdt_support.h>
  14 #include <fdtdec.h>
  15 #include <asm/sections.h>
  16 #include <dm/of_extra.h>
  17 #include <linux/ctype.h>
  18
  19 DECLARE_GLOBAL_DATA_PTR;
  20
  21 /*
  22  * Here are the type we know about. One day we might allow drivers to
  23  * register. For now we just put them here. The COMPAT macro allows us to
  24  * turn this into a sparse list later, and keeps the ID with the name.
  25  *
  26  * NOTE: This list is basically a TODO list for things that need to be
  27  * converted to driver model. So don't add new things here unless there is a
  28  * good reason why driver-model conversion is infeasible. Examples include
  29  * things which are used before driver model is available.
  30  */
  31 #define COMPAT(id, name) name
  32 static const char * const compat_names[COMPAT_COUNT] = {
  33         COMPAT(UNKNOWN, "<none>"),
  34         COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
  35         COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
  36         COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
  37         COMPAT(NVIDIA_TEGRA124_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(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
  45         COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
  46         COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
  47         COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
  48         COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
  49         COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),
  50         COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"),
  51         COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
  52         COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
  53         COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
  54         COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
  55         COMPAT(INTEL_MICROCODE, "intel,microcode"),
  56         COMPAT(AMS_AS3722, "ams,as3722"),
  57         COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
  58         COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"),
  59         COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"),
  60         COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"),
  61         COMPAT(INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
  62         COMPAT(INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
  63         COMPAT(INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"),
  64         COMPAT(COMPAT_SUNXI_NAND, "allwinner,sun4i-a10-nand"),
  65         COMPAT(ALTERA_SOCFPGA_CLK, "altr,clk-mgr"),
  66         COMPAT(ALTERA_SOCFPGA_PINCTRL_SINGLE, "pinctrl-single"),
  67         COMPAT(ALTERA_SOCFPGA_H2F_BRG, "altr,socfpga-hps2fpga-bridge"),
  68         COMPAT(ALTERA_SOCFPGA_LWH2F_BRG, "altr,socfpga-lwhps2fpga-bridge"),
  69         COMPAT(ALTERA_SOCFPGA_F2H_BRG, "altr,socfpga-fpga2hps-bridge"),
  70         COMPAT(ALTERA_SOCFPGA_F2SDR0, "altr,socfpga-fpga2sdram0-bridge"),
  71         COMPAT(ALTERA_SOCFPGA_F2SDR1, "altr,socfpga-fpga2sdram1-bridge"),
  72         COMPAT(ALTERA_SOCFPGA_F2SDR2, "altr,socfpga-fpga2sdram2-bridge"),
  73 };
  74
  75 const char *fdtdec_get_compatible(enum fdt_compat_id id)
  76 {
  77         /* We allow reading of the 'unknown' ID for testing purposes */
  78         assert(id >= 0 && id < COMPAT_COUNT);
  79         return compat_names[id];
  80 }
  81
  82 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node,
  83                 const char *prop_name, int index, int na, int ns,
  84                 fdt_size_t *sizep, bool translate)
  85 {
  86         const fdt32_t *prop, *prop_end;
  87         const fdt32_t *prop_addr, *prop_size, *prop_after_size;
  88         int len;
  89         fdt_addr_t addr;
  90
  91         debug("%s: %s: ", __func__, prop_name);
  92
  93         if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) {
  94                 debug("(na too large for fdt_addr_t type)\n");
  95                 return FDT_ADDR_T_NONE;
  96         }
  97
  98         if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) {
  99                 debug("(ns too large for fdt_size_t type)\n");
 100                 return FDT_ADDR_T_NONE;
 101         }
 102
 103         prop = fdt_getprop(blob, node, prop_name, &len);
 104         if (!prop) {
 105                 debug("(not found)\n");
 106                 return FDT_ADDR_T_NONE;
 107         }
 108         prop_end = prop + (len / sizeof(*prop));
 109
 110         prop_addr = prop + (index * (na + ns));
 111         prop_size = prop_addr + na;
 112         prop_after_size = prop_size + ns;
 113         if (prop_after_size > prop_end) {
 114                 debug("(not enough data: expected >= %d cells, got %d cells)\n",
 115                       (u32)(prop_after_size - prop), ((u32)(prop_end - prop)));
 116                 return FDT_ADDR_T_NONE;
 117         }
 118
 119 #if CONFIG_IS_ENABLED(OF_TRANSLATE)
 120         if (translate)
 121                 addr = fdt_translate_address(blob, node, prop_addr);
 122         else
 123 #endif
 124                 addr = fdtdec_get_number(prop_addr, na);
 125
 126         if (sizep) {
 127                 *sizep = fdtdec_get_number(prop_size, ns);
 128                 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr,
 129                       (unsigned long long)*sizep);
 130         } else {
 131                 debug("addr=%08llx\n", (unsigned long long)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                 bool translate)
 140 {
 141         int na, ns;
 142
 143         debug("%s: ", __func__);
 144
 145         na = fdt_address_cells(blob, parent);
 146         if (na < 1) {
 147                 debug("(bad #address-cells)\n");
 148                 return FDT_ADDR_T_NONE;
 149         }
 150
 151         ns = fdt_size_cells(blob, parent);
 152         if (ns < 0) {
 153                 debug("(bad #size-cells)\n");
 154                 return FDT_ADDR_T_NONE;
 155         }
 156
 157         debug("na=%d, ns=%d, ", na, ns);
 158
 159         return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na,
 160                                           ns, sizep, translate);
 161 }
 162
 163 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node,
 164                 const char *prop_name, int index, fdt_size_t *sizep,
 165                 bool translate)
 166 {
 167         int parent;
 168
 169         debug("%s: ", __func__);
 170
 171         parent = fdt_parent_offset(blob, node);
 172         if (parent < 0) {
 173                 debug("(no parent found)\n");
 174                 return FDT_ADDR_T_NONE;
 175         }
 176
 177         return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name,
 178                                                 index, sizep, translate);
 179 }
 180
 181 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
 182                 const char *prop_name, fdt_size_t *sizep)
 183 {
 184         int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0;
 185
 186         return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0,
 187                                           sizeof(fdt_addr_t) / sizeof(fdt32_t),
 188                                           ns, sizep, false);
 189 }
 190
 191 fdt_addr_t fdtdec_get_addr(const void *blob, int node,
 192                 const char *prop_name)
 193 {
 194         return fdtdec_get_addr_size(blob, node, prop_name, NULL);
 195 }
 196
 197 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)
 198 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
 199                 const char *prop_name, struct fdt_pci_addr *addr)
 200 {
 201         const u32 *cell;
 202         int len;
 203         int ret = -ENOENT;
 204
 205         debug("%s: %s: ", __func__, prop_name);
 206
 207         /*
 208          * If we follow the pci bus bindings strictly, we should check
 209          * the value of the node's parent node's #address-cells and
 210          * #size-cells. They need to be 3 and 2 accordingly. However,
 211          * for simplicity we skip the check here.
 212          */
 213         cell = fdt_getprop(blob, node, prop_name, &len);
 214         if (!cell)
 215                 goto fail;
 216
 217         if ((len % FDT_PCI_REG_SIZE) == 0) {
 218                 int num = len / FDT_PCI_REG_SIZE;
 219                 int i;
 220
 221                 for (i = 0; i < num; i++) {
 222                         debug("pci address #%d: %08lx %08lx %08lx\n", i,
 223                               (ulong)fdt32_to_cpu(cell[0]),
 224                               (ulong)fdt32_to_cpu(cell[1]),
 225                               (ulong)fdt32_to_cpu(cell[2]));
 226                         if ((fdt32_to_cpu(*cell) & type) == type) {
 227                                 addr->phys_hi = fdt32_to_cpu(cell[0]);
 228                                 addr->phys_mid = fdt32_to_cpu(cell[1]);
 229                                 addr->phys_lo = fdt32_to_cpu(cell[1]);
 230                                 break;
 231                         } else {
 232                                 cell += (FDT_PCI_ADDR_CELLS +
 233                                          FDT_PCI_SIZE_CELLS);
 234                         }
 235                 }
 236
 237                 if (i == num) {
 238                         ret = -ENXIO;
 239                         goto fail;
 240                 }
 241
 242                 return 0;
 243         } else {
 244                 ret = -EINVAL;
 245         }
 246
 247 fail:
 248         debug("(not found)\n");
 249         return ret;
 250 }
 251
 252 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
 253 {
 254         const char *list, *end;
 255         int len;
 256
 257         list = fdt_getprop(blob, node, "compatible", &len);
 258         if (!list)
 259                 return -ENOENT;
 260
 261         end = list + len;
 262         while (list < end) {
 263                 char *s;
 264
 265                 len = strlen(list);
 266                 if (len >= strlen("pciVVVV,DDDD")) {
 267                         s = strstr(list, "pci");
 268
 269                         /*
 270                          * check if the string is something like pciVVVV,DDDD.RR
 271                          * or just pciVVVV,DDDD
 272                          */
 273                         if (s && s[7] == ',' &&
 274                             (s[12] == '.' || s[12] == 0)) {
 275                                 s += 3;
 276                                 *vendor = simple_strtol(s, NULL, 16);
 277
 278                                 s += 5;
 279                                 *device = simple_strtol(s, NULL, 16);
 280
 281                                 return 0;
 282                         }
 283                 }
 284                 list += (len + 1);
 285         }
 286
 287         return -ENOENT;
 288 }
 289
 290 int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr,
 291                          u32 *bar)
 292 {
 293         int barnum;
 294
 295         /* extract the bar number from fdt_pci_addr */
 296         barnum = addr->phys_hi & 0xff;
 297         if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
 298                 return -EINVAL;
 299
 300         barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
 301         *bar = dm_pci_read_bar32(dev, barnum);
 302
 303         return 0;
 304 }
 305 #endif
 306
 307 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
 308                 uint64_t default_val)
 309 {
 310         const uint64_t *cell64;
 311         int length;
 312
 313         cell64 = fdt_getprop(blob, node, prop_name, &length);
 314         if (!cell64 || length < sizeof(*cell64))
 315                 return default_val;
 316
 317         return fdt64_to_cpu(*cell64);
 318 }
 319
 320 int fdtdec_get_is_enabled(const void *blob, int node)
 321 {
 322         const char *cell;
 323
 324         /*
 325          * It should say "okay", so only allow that. Some fdts use "ok" but
 326          * this is a bug. Please fix your device tree source file. See here
 327          * for discussion:
 328          *
 329          * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
 330          */
 331         cell = fdt_getprop(blob, node, "status", NULL);
 332         if (cell)
 333                 return 0 == strcmp(cell, "okay");
 334         return 1;
 335 }
 336
 337 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
 338 {
 339         enum fdt_compat_id id;
 340
 341         /* Search our drivers */
 342         for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
 343                 if (0 == fdt_node_check_compatible(blob, node,
 344                                 compat_names[id]))
 345                         return id;
 346         return COMPAT_UNKNOWN;
 347 }
 348
 349 int fdtdec_next_compatible(const void *blob, int node,
 350                 enum fdt_compat_id id)
 351 {
 352         return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
 353 }
 354
 355 int fdtdec_next_compatible_subnode(const void *blob, int node,
 356                 enum fdt_compat_id id, int *depthp)
 357 {
 358         do {
 359                 node = fdt_next_node(blob, node, depthp);
 360         } while (*depthp > 1);
 361
 362         /* If this is a direct subnode, and compatible, return it */
 363         if (*depthp == 1 && 0 == fdt_node_check_compatible(
 364                                                 blob, node, compat_names[id]))
 365                 return node;
 366
 367         return -FDT_ERR_NOTFOUND;
 368 }
 369
 370 int fdtdec_next_alias(const void *blob, const char *name,
 371                 enum fdt_compat_id id, int *upto)
 372 {
 373 #define MAX_STR_LEN 20
 374         char str[MAX_STR_LEN + 20];
 375         int node, err;
 376
 377         /* snprintf() is not available */
 378         assert(strlen(name) < MAX_STR_LEN);
 379         sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
 380         node = fdt_path_offset(blob, str);
 381         if (node < 0)
 382                 return node;
 383         err = fdt_node_check_compatible(blob, node, compat_names[id]);
 384         if (err < 0)
 385                 return err;
 386         if (err)
 387                 return -FDT_ERR_NOTFOUND;
 388         (*upto)++;
 389         return node;
 390 }
 391
 392 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
 393                         enum fdt_compat_id id, int *node_list, int maxcount)
 394 {
 395         memset(node_list, '\0', sizeof(*node_list) * maxcount);
 396
 397         return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
 398 }
 399
 400 /* TODO: Can we tighten this code up a little? */
 401 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
 402                         enum fdt_compat_id id, int *node_list, int maxcount)
 403 {
 404         int name_len = strlen(name);
 405         int nodes[maxcount];
 406         int num_found = 0;
 407         int offset, node;
 408         int alias_node;
 409         int count;
 410         int i, j;
 411
 412         /* find the alias node if present */
 413         alias_node = fdt_path_offset(blob, "/aliases");
 414
 415         /*
 416          * start with nothing, and we can assume that the root node can't
 417          * match
 418          */
 419         memset(nodes, '\0', sizeof(nodes));
 420
 421         /* First find all the compatible nodes */
 422         for (node = count = 0; node >= 0 && count < maxcount;) {
 423                 node = fdtdec_next_compatible(blob, node, id);
 424                 if (node >= 0)
 425                         nodes[count++] = node;
 426         }
 427         if (node >= 0)
 428                 debug("%s: warning: maxcount exceeded with alias '%s'\n",
 429                        __func__, name);
 430
 431         /* Now find all the aliases */
 432         for (offset = fdt_first_property_offset(blob, alias_node);
 433                         offset > 0;
 434                         offset = fdt_next_property_offset(blob, offset)) {
 435                 const struct fdt_property *prop;
 436                 const char *path;
 437                 int number;
 438                 int found;
 439
 440                 node = 0;
 441                 prop = fdt_get_property_by_offset(blob, offset, NULL);
 442                 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
 443                 if (prop->len && 0 == strncmp(path, name, name_len))
 444                         node = fdt_path_offset(blob, prop->data);
 445                 if (node <= 0)
 446                         continue;
 447
 448                 /* Get the alias number */
 449                 number = simple_strtoul(path + name_len, NULL, 10);
 450                 if (number < 0 || number >= maxcount) {
 451                         debug("%s: warning: alias '%s' is out of range\n",
 452                                __func__, path);
 453                         continue;
 454                 }
 455
 456                 /* Make sure the node we found is actually in our list! */
 457                 found = -1;
 458                 for (j = 0; j < count; j++)
 459                         if (nodes[j] == node) {
 460                                 found = j;
 461                                 break;
 462                         }
 463
 464                 if (found == -1) {
 465                         debug("%s: warning: alias '%s' points to a node "
 466                                 "'%s' that is missing or is not compatible "
 467                                 " with '%s'\n", __func__, path,
 468                                 fdt_get_name(blob, node, NULL),
 469                                compat_names[id]);
 470                         continue;
 471                 }
 472
 473                 /*
 474                  * Add this node to our list in the right place, and mark
 475                  * it as done.
 476                  */
 477                 if (fdtdec_get_is_enabled(blob, node)) {
 478                         if (node_list[number]) {
 479                                 debug("%s: warning: alias '%s' requires that "
 480                                       "a node be placed in the list in a "
 481                                       "position which is already filled by "
 482                                       "node '%s'\n", __func__, path,
 483                                       fdt_get_name(blob, node, NULL));
 484                                 continue;
 485                         }
 486                         node_list[number] = node;
 487                         if (number >= num_found)
 488                                 num_found = number + 1;
 489                 }
 490                 nodes[found] = 0;
 491         }
 492
 493         /* Add any nodes not mentioned by an alias */
 494         for (i = j = 0; i < maxcount; i++) {
 495                 if (!node_list[i]) {
 496                         for (; j < maxcount; j++)
 497                                 if (nodes[j] &&
 498                                         fdtdec_get_is_enabled(blob, nodes[j]))
 499                                         break;
 500
 501                         /* Have we run out of nodes to add? */
 502                         if (j == maxcount)
 503                                 break;
 504
 505                         assert(!node_list[i]);
 506                         node_list[i] = nodes[j++];
 507                         if (i >= num_found)
 508                                 num_found = i + 1;
 509                 }
 510         }
 511
 512         return num_found;
 513 }
 514
 515 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
 516                          int *seqp)
 517 {
 518         int base_len = strlen(base);
 519         const char *find_name;
 520         int find_namelen;
 521         int prop_offset;
 522         int aliases;
 523
 524         find_name = fdt_get_name(blob, offset, &find_namelen);
 525         debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
 526
 527         aliases = fdt_path_offset(blob, "/aliases");
 528         for (prop_offset = fdt_first_property_offset(blob, aliases);
 529              prop_offset > 0;
 530              prop_offset = fdt_next_property_offset(blob, prop_offset)) {
 531                 const char *prop;
 532                 const char *name;
 533                 const char *slash;
 534                 int len, val;
 535
 536                 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
 537                 debug("   - %s, %s\n", name, prop);
 538                 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
 539                     strncmp(name, base, base_len))
 540                         continue;
 541
 542                 slash = strrchr(prop, '/');
 543                 if (strcmp(slash + 1, find_name))
 544                         continue;
 545                 val = trailing_strtol(name);
 546                 if (val != -1) {
 547                         *seqp = val;
 548                         debug("Found seq %d\n", *seqp);
 549                         return 0;
 550                 }
 551         }
 552
 553         debug("Not found\n");
 554         return -ENOENT;
 555 }
 556
 557 const char *fdtdec_get_chosen_prop(const void *blob, const char *name)
 558 {
 559         int chosen_node;
 560
 561         if (!blob)
 562                 return NULL;
 563         chosen_node = fdt_path_offset(blob, "/chosen");
 564         return fdt_getprop(blob, chosen_node, name, NULL);
 565 }
 566
 567 int fdtdec_get_chosen_node(const void *blob, const char *name)
 568 {
 569         const char *prop;
 570
 571         prop = fdtdec_get_chosen_prop(blob, name);
 572         if (!prop)
 573                 return -FDT_ERR_NOTFOUND;
 574         return fdt_path_offset(blob, prop);
 575 }
 576
 577 int fdtdec_check_fdt(void)
 578 {
 579         /*
 580          * We must have an FDT, but we cannot panic() yet since the console
 581          * is not ready. So for now, just assert(). Boards which need an early
 582          * FDT (prior to console ready) will need to make their own
 583          * arrangements and do their own checks.
 584          */
 585         assert(!fdtdec_prepare_fdt());
 586         return 0;
 587 }
 588
 589 /*
 590  * This function is a little odd in that it accesses global data. At some
 591  * point if the architecture board.c files merge this will make more sense.
 592  * Even now, it is common code.
 593  */
 594 int fdtdec_prepare_fdt(void)
 595 {
 596         if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
 597             fdt_check_header(gd->fdt_blob)) {
 598 #ifdef CONFIG_SPL_BUILD
 599                 puts("Missing DTB\n");
 600 #else
 601                 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");
 602 # ifdef DEBUG
 603                 if (gd->fdt_blob) {
 604                         printf("fdt_blob=%p\n", gd->fdt_blob);
 605                         print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
 606                                      32, 0);
 607                 }
 608 # endif
 609 #endif
 610                 return -1;
 611         }
 612         return 0;
 613 }
 614
 615 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
 616 {
 617         const u32 *phandle;
 618         int lookup;
 619
 620         debug("%s: %s\n", __func__, prop_name);
 621         phandle = fdt_getprop(blob, node, prop_name, NULL);
 622         if (!phandle)
 623                 return -FDT_ERR_NOTFOUND;
 624
 625         lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
 626         return lookup;
 627 }
 628
 629 /**
 630  * Look up a property in a node and check that it has a minimum length.
 631  *
 632  * @param blob          FDT blob
 633  * @param node          node to examine
 634  * @param prop_name     name of property to find
 635  * @param min_len       minimum property length in bytes
 636  * @param err           0 if ok, or -FDT_ERR_NOTFOUND if the property is not
 637                         found, or -FDT_ERR_BADLAYOUT if not enough data
 638  * @return pointer to cell, which is only valid if err == 0
 639  */
 640 static const void *get_prop_check_min_len(const void *blob, int node,
 641                 const char *prop_name, int min_len, int *err)
 642 {
 643         const void *cell;
 644         int len;
 645
 646         debug("%s: %s\n", __func__, prop_name);
 647         cell = fdt_getprop(blob, node, prop_name, &len);
 648         if (!cell)
 649                 *err = -FDT_ERR_NOTFOUND;
 650         else if (len < min_len)
 651                 *err = -FDT_ERR_BADLAYOUT;
 652         else
 653                 *err = 0;
 654         return cell;
 655 }
 656
 657 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
 658                 u32 *array, int count)
 659 {
 660         const u32 *cell;
 661         int i, err = 0;
 662
 663         debug("%s: %s\n", __func__, prop_name);
 664         cell = get_prop_check_min_len(blob, node, prop_name,
 665                                       sizeof(u32) * count, &err);
 666         if (!err) {
 667                 for (i = 0; i < count; i++)
 668                         array[i] = fdt32_to_cpu(cell[i]);
 669         }
 670         return err;
 671 }
 672
 673 int fdtdec_get_int_array_count(const void *blob, int node,
 674                                const char *prop_name, u32 *array, int count)
 675 {
 676         const u32 *cell;
 677         int len, elems;
 678         int i;
 679
 680         debug("%s: %s\n", __func__, prop_name);
 681         cell = fdt_getprop(blob, node, prop_name, &len);
 682         if (!cell)
 683                 return -FDT_ERR_NOTFOUND;
 684         elems = len / sizeof(u32);
 685         if (count > elems)
 686                 count = elems;
 687         for (i = 0; i < count; i++)
 688                 array[i] = fdt32_to_cpu(cell[i]);
 689
 690         return count;
 691 }
 692
 693 const u32 *fdtdec_locate_array(const void *blob, int node,
 694                                const char *prop_name, int count)
 695 {
 696         const u32 *cell;
 697         int err;
 698
 699         cell = get_prop_check_min_len(blob, node, prop_name,
 700                                       sizeof(u32) * count, &err);
 701         return err ? NULL : cell;
 702 }
 703
 704 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
 705 {
 706         const s32 *cell;
 707         int len;
 708
 709         debug("%s: %s\n", __func__, prop_name);
 710         cell = fdt_getprop(blob, node, prop_name, &len);
 711         return cell != NULL;
 712 }
 713
 714 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
 715                                    const char *list_name,
 716                                    const char *cells_name,
 717                                    int cell_count, int index,
 718                                    struct fdtdec_phandle_args *out_args)
 719 {
 720         const __be32 *list, *list_end;
 721         int rc = 0, size, cur_index = 0;
 722         uint32_t count = 0;
 723         int node = -1;
 724         int phandle;
 725
 726         /* Retrieve the phandle list property */
 727         list = fdt_getprop(blob, src_node, list_name, &size);
 728         if (!list)
 729                 return -ENOENT;
 730         list_end = list + size / sizeof(*list);
 731
 732         /* Loop over the phandles until all the requested entry is found */
 733         while (list < list_end) {
 734                 rc = -EINVAL;
 735                 count = 0;
 736
 737                 /*
 738                  * If phandle is 0, then it is an empty entry with no
 739                  * arguments.  Skip forward to the next entry.
 740                  */
 741                 phandle = be32_to_cpup(list++);
 742                 if (phandle) {
 743                         /*
 744                          * Find the provider node and parse the #*-cells
 745                          * property to determine the argument length.
 746                          *
 747                          * This is not needed if the cell count is hard-coded
 748                          * (i.e. cells_name not set, but cell_count is set),
 749                          * except when we're going to return the found node
 750                          * below.
 751                          */
 752                         if (cells_name || cur_index == index) {
 753                                 node = fdt_node_offset_by_phandle(blob,
 754                                                                   phandle);
 755                                 if (!node) {
 756                                         debug("%s: could not find phandle\n",
 757                                               fdt_get_name(blob, src_node,
 758                                                            NULL));
 759                                         goto err;
 760                                 }
 761                         }
 762
 763                         if (cells_name) {
 764                                 count = fdtdec_get_int(blob, node, cells_name,
 765                                                        -1);
 766                                 if (count == -1) {
 767                                         debug("%s: could not get %s for %s\n",
 768                                               fdt_get_name(blob, src_node,
 769                                                            NULL),
 770                                               cells_name,
 771                                               fdt_get_name(blob, node,
 772                                                            NULL));
 773                                         goto err;
 774                                 }
 775                         } else {
 776                                 count = cell_count;
 777                         }
 778
 779                         /*
 780                          * Make sure that the arguments actually fit in the
 781                          * remaining property data length
 782                          */
 783                         if (list + count > list_end) {
 784                                 debug("%s: arguments longer than property\n",
 785                                       fdt_get_name(blob, src_node, NULL));
 786                                 goto err;
 787                         }
 788                 }
 789
 790                 /*
 791                  * All of the error cases above bail out of the loop, so at
 792                  * this point, the parsing is successful. If the requested
 793                  * index matches, then fill the out_args structure and return,
 794                  * or return -ENOENT for an empty entry.
 795                  */
 796                 rc = -ENOENT;
 797                 if (cur_index == index) {
 798                         if (!phandle)
 799                                 goto err;
 800
 801                         if (out_args) {
 802                                 int i;
 803
 804                                 if (count > MAX_PHANDLE_ARGS) {
 805                                         debug("%s: too many arguments %d\n",
 806                                               fdt_get_name(blob, src_node,
 807                                                            NULL), count);
 808                                         count = MAX_PHANDLE_ARGS;
 809                                 }
 810                                 out_args->node = node;
 811                                 out_args->args_count = count;
 812                                 for (i = 0; i < count; i++) {
 813                                         out_args->args[i] =
 814                                                         be32_to_cpup(list++);
 815                                 }
 816                         }
 817
 818                         /* Found it! return success */
 819                         return 0;
 820                 }
 821
 822                 node = -1;
 823                 list += count;
 824                 cur_index++;
 825         }
 826
 827         /*
 828          * Result will be one of:
 829          * -ENOENT : index is for empty phandle
 830          * -EINVAL : parsing error on data
 831          * [1..n]  : Number of phandle (count mode; when index = -1)
 832          */
 833         rc = index < 0 ? cur_index : -ENOENT;
 834  err:
 835         return rc;
 836 }
 837
 838 int fdtdec_get_child_count(const void *blob, int node)
 839 {
 840         int subnode;
 841         int num = 0;
 842
 843         fdt_for_each_subnode(subnode, blob, node)
 844                 num++;
 845
 846         return num;
 847 }
 848
 849 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
 850                 u8 *array, int count)
 851 {
 852         const u8 *cell;
 853         int err;
 854
 855         cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
 856         if (!err)
 857                 memcpy(array, cell, count);
 858         return err;
 859 }
 860
 861 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
 862                              const char *prop_name, int count)
 863 {
 864         const u8 *cell;
 865         int err;
 866
 867         cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
 868         if (err)
 869                 return NULL;
 870         return cell;
 871 }
 872
 873 int fdtdec_get_config_int(const void *blob, const char *prop_name,
 874                 int default_val)
 875 {
 876         int config_node;
 877
 878         debug("%s: %s\n", __func__, prop_name);
 879         config_node = fdt_path_offset(blob, "/config");
 880         if (config_node < 0)
 881                 return default_val;
 882         return fdtdec_get_int(blob, config_node, prop_name, default_val);
 883 }
 884
 885 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
 886 {
 887         int config_node;
 888         const void *prop;
 889
 890         debug("%s: %s\n", __func__, prop_name);
 891         config_node = fdt_path_offset(blob, "/config");
 892         if (config_node < 0)
 893                 return 0;
 894         prop = fdt_get_property(blob, config_node, prop_name, NULL);
 895
 896         return prop != NULL;
 897 }
 898
 899 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
 900 {
 901         const char *nodep;
 902         int nodeoffset;
 903         int len;
 904
 905         debug("%s: %s\n", __func__, prop_name);
 906         nodeoffset = fdt_path_offset(blob, "/config");
 907         if (nodeoffset < 0)
 908                 return NULL;
 909
 910         nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
 911         if (!nodep)
 912                 return NULL;
 913
 914         return (char *)nodep;
 915 }
 916
 917 int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
 918                          fdt_addr_t *basep, fdt_size_t *sizep)
 919 {
 920         const fdt_addr_t *cell;
 921         int len;
 922
 923         debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
 924               prop_name);
 925         cell = fdt_getprop(blob, node, prop_name, &len);
 926         if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
 927                 debug("cell=%p, len=%d\n", cell, len);
 928                 return -1;
 929         }
 930
 931         *basep = fdt_addr_to_cpu(*cell);
 932         *sizep = fdt_size_to_cpu(cell[1]);
 933         debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
 934               (ulong)*sizep);
 935
 936         return 0;
 937 }
 938
 939 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
 940 {
 941         u64 number = 0;
 942
 943         while (cells--)
 944                 number = (number << 32) | fdt32_to_cpu(*ptr++);
 945
 946         return number;
 947 }
 948
 949 int fdt_get_resource(const void *fdt, int node, const char *property,
 950                      unsigned int index, struct fdt_resource *res)
 951 {
 952         const fdt32_t *ptr, *end;
 953         int na, ns, len, parent;
 954         unsigned int i = 0;
 955
 956         parent = fdt_parent_offset(fdt, node);
 957         if (parent < 0)
 958                 return parent;
 959
 960         na = fdt_address_cells(fdt, parent);
 961         ns = fdt_size_cells(fdt, parent);
 962
 963         ptr = fdt_getprop(fdt, node, property, &len);
 964         if (!ptr)
 965                 return len;
 966
 967         end = ptr + len / sizeof(*ptr);
 968
 969         while (ptr + na + ns <= end) {
 970                 if (i == index) {
 971                         res->start = res->end = fdtdec_get_number(ptr, na);
 972                         res->end += fdtdec_get_number(&ptr[na], ns) - 1;
 973                         return 0;
 974                 }
 975
 976                 ptr += na + ns;
 977                 i++;
 978         }
 979
 980         return -FDT_ERR_NOTFOUND;
 981 }
 982
 983 int fdt_get_named_resource(const void *fdt, int node, const char *property,
 984                            const char *prop_names, const char *name,
 985                            struct fdt_resource *res)
 986 {
 987         int index;
 988
 989         index = fdt_stringlist_search(fdt, node, prop_names, name);
 990         if (index < 0)
 991                 return index;
 992
 993         return fdt_get_resource(fdt, node, property, index, res);
 994 }
 995
 996 int fdtdec_decode_memory_region(const void *blob, int config_node,
 997                                 const char *mem_type, const char *suffix,
 998                                 fdt_addr_t *basep, fdt_size_t *sizep)
 999 {
1000         char prop_name[50];
1001         const char *mem;
1002         fdt_size_t size, offset_size;
1003         fdt_addr_t base, offset;
1004         int node;
1005
1006         if (config_node == -1) {
1007                 config_node = fdt_path_offset(blob, "/config");
1008                 if (config_node < 0) {
1009                         debug("%s: Cannot find /config node\n", __func__);
1010                         return -ENOENT;
1011                 }
1012         }
1013         if (!suffix)
1014                 suffix = "";
1015
1016         snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
1017                  suffix);
1018         mem = fdt_getprop(blob, config_node, prop_name, NULL);
1019         if (!mem) {
1020                 debug("%s: No memory type for '%s', using /memory\n", __func__,
1021                       prop_name);
1022                 mem = "/memory";
1023         }
1024
1025         node = fdt_path_offset(blob, mem);
1026         if (node < 0) {
1027                 debug("%s: Failed to find node '%s': %s\n", __func__, mem,
1028                       fdt_strerror(node));
1029                 return -ENOENT;
1030         }
1031
1032         /*
1033          * Not strictly correct - the memory may have multiple banks. We just
1034          * use the first
1035          */
1036         if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
1037                 debug("%s: Failed to decode memory region %s\n", __func__,
1038                       mem);
1039                 return -EINVAL;
1040         }
1041
1042         snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
1043                  suffix);
1044         if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
1045                                  &offset_size)) {
1046                 debug("%s: Failed to decode memory region '%s'\n", __func__,
1047                       prop_name);
1048                 return -EINVAL;
1049         }
1050
1051         *basep = base + offset;
1052         *sizep = offset_size;
1053
1054         return 0;
1055 }
1056
1057 static int decode_timing_property(const void *blob, int node, const char *name,
1058                                   struct timing_entry *result)
1059 {
1060         int length, ret = 0;
1061         const u32 *prop;
1062
1063         prop = fdt_getprop(blob, node, name, &length);
1064         if (!prop) {
1065                 debug("%s: could not find property %s\n",
1066                       fdt_get_name(blob, node, NULL), name);
1067                 return length;
1068         }
1069
1070         if (length == sizeof(u32)) {
1071                 result->typ = fdtdec_get_int(blob, node, name, 0);
1072                 result->min = result->typ;
1073                 result->max = result->typ;
1074         } else {
1075                 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
1076         }
1077
1078         return ret;
1079 }
1080
1081 int fdtdec_decode_display_timing(const void *blob, int parent, int index,
1082                                  struct display_timing *dt)
1083 {
1084         int i, node, timings_node;
1085         u32 val = 0;
1086         int ret = 0;
1087
1088         timings_node = fdt_subnode_offset(blob, parent, "display-timings");
1089         if (timings_node < 0)
1090                 return timings_node;
1091
1092         for (i = 0, node = fdt_first_subnode(blob, timings_node);
1093              node > 0 && i != index;
1094              node = fdt_next_subnode(blob, node))
1095                 i++;
1096
1097         if (node < 0)
1098                 return node;
1099
1100         memset(dt, 0, sizeof(*dt));
1101
1102         ret |= decode_timing_property(blob, node, "hback-porch",
1103                                       &dt->hback_porch);
1104         ret |= decode_timing_property(blob, node, "hfront-porch",
1105                                       &dt->hfront_porch);
1106         ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
1107         ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
1108         ret |= decode_timing_property(blob, node, "vback-porch",
1109                                       &dt->vback_porch);
1110         ret |= decode_timing_property(blob, node, "vfront-porch",
1111                                       &dt->vfront_porch);
1112         ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
1113         ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
1114         ret |= decode_timing_property(blob, node, "clock-frequency",
1115                                       &dt->pixelclock);
1116
1117         dt->flags = 0;
1118         val = fdtdec_get_int(blob, node, "vsync-active", -1);
1119         if (val != -1) {
1120                 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1121                                 DISPLAY_FLAGS_VSYNC_LOW;
1122         }
1123         val = fdtdec_get_int(blob, node, "hsync-active", -1);
1124         if (val != -1) {
1125                 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1126                                 DISPLAY_FLAGS_HSYNC_LOW;
1127         }
1128         val = fdtdec_get_int(blob, node, "de-active", -1);
1129         if (val != -1) {
1130                 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1131                                 DISPLAY_FLAGS_DE_LOW;
1132         }
1133         val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1134         if (val != -1) {
1135                 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1136                                 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1137         }
1138
1139         if (fdtdec_get_bool(blob, node, "interlaced"))
1140                 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1141         if (fdtdec_get_bool(blob, node, "doublescan"))
1142                 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1143         if (fdtdec_get_bool(blob, node, "doubleclk"))
1144                 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1145
1146         return ret;
1147 }
1148
1149 int fdtdec_setup_memory_size(void)
1150 {
1151         int ret, mem;
1152         struct fdt_resource res;
1153
1154         mem = fdt_path_offset(gd->fdt_blob, "/memory");
1155         if (mem < 0) {
1156                 debug("%s: Missing /memory node\n", __func__);
1157                 return -EINVAL;
1158         }
1159
1160         ret = fdt_get_resource(gd->fdt_blob, mem, "reg", 0, &res);
1161         if (ret != 0) {
1162                 debug("%s: Unable to decode first memory bank\n", __func__);
1163                 return -EINVAL;
1164         }
1165
1166         gd->ram_size = (phys_size_t)(res.end - res.start + 1);
1167         debug("%s: Initial DRAM size %llx\n", __func__,
1168               (unsigned long long)gd->ram_size);
1169
1170         return 0;
1171 }
1172
1173 #if defined(CONFIG_NR_DRAM_BANKS)
1174 int fdtdec_setup_memory_banksize(void)
1175 {
1176         int bank, ret, mem;
1177         struct fdt_resource res;
1178
1179         mem = fdt_path_offset(gd->fdt_blob, "/memory");
1180         if (mem < 0) {
1181                 debug("%s: Missing /memory node\n", __func__);
1182                 return -EINVAL;
1183         }
1184
1185         for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
1186                 ret = fdt_get_resource(gd->fdt_blob, mem, "reg", bank, &res);
1187                 if (ret == -FDT_ERR_NOTFOUND)
1188                         break;
1189                 if (ret != 0)
1190                         return -EINVAL;
1191
1192                 gd->bd->bi_dram[bank].start = (phys_addr_t)res.start;
1193                 gd->bd->bi_dram[bank].size =
1194                         (phys_size_t)(res.end - res.start + 1);
1195
1196                 debug("%s: DRAM Bank #%d: start = 0x%llx, size = 0x%llx\n",
1197                       __func__, bank,
1198                       (unsigned long long)gd->bd->bi_dram[bank].start,
1199                       (unsigned long long)gd->bd->bi_dram[bank].size);
1200         }
1201
1202         return 0;
1203 }
1204 #endif
1205
1206 int fdtdec_setup(void)
1207 {
1208 #if CONFIG_IS_ENABLED(OF_CONTROL)
1209 # ifdef CONFIG_OF_EMBED
1210         /* Get a pointer to the FDT */
1211         gd->fdt_blob = __dtb_dt_begin;
1212 # elif defined CONFIG_OF_SEPARATE
1213 #  ifdef CONFIG_SPL_BUILD
1214         /* FDT is at end of BSS unless it is in a different memory region */
1215         if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
1216                 gd->fdt_blob = (ulong *)&_image_binary_end;
1217         else
1218                 gd->fdt_blob = (ulong *)&__bss_end;
1219
1220 #  elif defined CONFIG_FIT_EMBED
1221         gd->fdt_blob = locate_dtb_in_fit(&_end);
1222
1223         if (gd->fdt_blob == NULL || gd->fdt_blob <= ((void *)&_end)) {
1224                 puts("Failed to find proper dtb in embedded FIT Image\n");
1225                 return -1;
1226         }
1227
1228 #  else
1229         /* FDT is at end of image */
1230         gd->fdt_blob = (ulong *)&_end;
1231 #  endif
1232 # elif defined(CONFIG_OF_BOARD)
1233         /* Allow the board to override the fdt address. */
1234         gd->fdt_blob = board_fdt_blob_setup();
1235 # elif defined(CONFIG_OF_HOSTFILE)
1236         if (sandbox_read_fdt_from_file()) {
1237                 puts("Failed to read control FDT\n");
1238                 return -1;
1239         }
1240 # endif
1241 # ifndef CONFIG_SPL_BUILD
1242         /* Allow the early environment to override the fdt address */
1243         gd->fdt_blob = (void *)env_get_ulong("fdtcontroladdr", 16,
1244                                                 (uintptr_t)gd->fdt_blob);
1245 # endif
1246 #endif
1247         return fdtdec_prepare_fdt();
1248 }
1249
1250 #endif /* !USE_HOSTCC */