lib/fdtdec.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2011 The Chromium OS Authors.
   4  */
   5
   6 #ifndef USE_HOSTCC
   7 #include <common.h>
   8 #include <boot_fit.h>
   9 #include <dm.h>
  10 #include <dm/of_extra.h>
  11 #include <errno.h>
  12 #include <fdtdec.h>
  13 #include <fdt_support.h>
  14 #include <mapmem.h>
  15 #include <linux/libfdt.h>
  16 #include <serial.h>
  17 #include <asm/sections.h>
  18 #include <linux/ctype.h>
  19 #include <linux/lzo.h>
  20
  21 DECLARE_GLOBAL_DATA_PTR;
  22
  23 /*
  24  * Here are the type we know about. One day we might allow drivers to
  25  * register. For now we just put them here. The COMPAT macro allows us to
  26  * turn this into a sparse list later, and keeps the ID with the name.
  27  *
  28  * NOTE: This list is basically a TODO list for things that need to be
  29  * converted to driver model. So don't add new things here unless there is a
  30  * good reason why driver-model conversion is infeasible. Examples include
  31  * things which are used before driver model is available.
  32  */
  33 #define COMPAT(id, name) name
  34 static const char * const compat_names[COMPAT_COUNT] = {
  35         COMPAT(UNKNOWN, "<none>"),
  36         COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
  37         COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
  38         COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
  39         COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"),
  40         COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"),
  41         COMPAT(SMSC_LAN9215, "smsc,lan9215"),
  42         COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
  43         COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
  44         COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
  45         COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
  46         COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
  47         COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
  48         COMPAT(GENERIC_SPI_FLASH, "jedec,spi-nor"),
  49         COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
  50         COMPAT(INTEL_MICROCODE, "intel,microcode"),
  51         COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
  52         COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"),
  53         COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"),
  54         COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"),
  55         COMPAT(INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
  56         COMPAT(INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
  57         COMPAT(INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"),
  58         COMPAT(COMPAT_SUNXI_NAND, "allwinner,sun4i-a10-nand"),
  59         COMPAT(ALTERA_SOCFPGA_CLK, "altr,clk-mgr"),
  60         COMPAT(ALTERA_SOCFPGA_PINCTRL_SINGLE, "pinctrl-single"),
  61         COMPAT(ALTERA_SOCFPGA_H2F_BRG, "altr,socfpga-hps2fpga-bridge"),
  62         COMPAT(ALTERA_SOCFPGA_LWH2F_BRG, "altr,socfpga-lwhps2fpga-bridge"),
  63         COMPAT(ALTERA_SOCFPGA_F2H_BRG, "altr,socfpga-fpga2hps-bridge"),
  64         COMPAT(ALTERA_SOCFPGA_F2SDR0, "altr,socfpga-fpga2sdram0-bridge"),
  65         COMPAT(ALTERA_SOCFPGA_F2SDR1, "altr,socfpga-fpga2sdram1-bridge"),
  66         COMPAT(ALTERA_SOCFPGA_F2SDR2, "altr,socfpga-fpga2sdram2-bridge"),
  67         COMPAT(ALTERA_SOCFPGA_FPGA0, "altr,socfpga-a10-fpga-mgr"),
  68         COMPAT(ALTERA_SOCFPGA_NOC, "altr,socfpga-a10-noc"),
  69         COMPAT(ALTERA_SOCFPGA_CLK_INIT, "altr,socfpga-a10-clk-init")
  70 };
  71
  72 const char *fdtdec_get_compatible(enum fdt_compat_id id)
  73 {
  74         /* We allow reading of the 'unknown' ID for testing purposes */
  75         assert(id >= 0 && id < COMPAT_COUNT);
  76         return compat_names[id];
  77 }
  78
  79 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node,
  80                                       const char *prop_name, int index, int na,
  81                                       int ns, fdt_size_t *sizep,
  82                                       bool translate)
  83 {
  84         const fdt32_t *prop, *prop_end;
  85         const fdt32_t *prop_addr, *prop_size, *prop_after_size;
  86         int len;
  87         fdt_addr_t addr;
  88
  89         debug("%s: %s: ", __func__, prop_name);
  90
  91         prop = fdt_getprop(blob, node, prop_name, &len);
  92         if (!prop) {
  93                 debug("(not found)\n");
  94                 return FDT_ADDR_T_NONE;
  95         }
  96         prop_end = prop + (len / sizeof(*prop));
  97
  98         prop_addr = prop + (index * (na + ns));
  99         prop_size = prop_addr + na;
 100         prop_after_size = prop_size + ns;
 101         if (prop_after_size > prop_end) {
 102                 debug("(not enough data: expected >= %d cells, got %d cells)\n",
 103                       (u32)(prop_after_size - prop), ((u32)(prop_end - prop)));
 104                 return FDT_ADDR_T_NONE;
 105         }
 106
 107 #if CONFIG_IS_ENABLED(OF_TRANSLATE)
 108         if (translate)
 109                 addr = fdt_translate_address(blob, node, prop_addr);
 110         else
 111 #endif
 112                 addr = fdtdec_get_number(prop_addr, na);
 113
 114         if (sizep) {
 115                 *sizep = fdtdec_get_number(prop_size, ns);
 116                 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr,
 117                       (unsigned long long)*sizep);
 118         } else {
 119                 debug("addr=%08llx\n", (unsigned long long)addr);
 120         }
 121
 122         return addr;
 123 }
 124
 125 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent,
 126                                             int node, const char *prop_name,
 127                                             int index, fdt_size_t *sizep,
 128                                             bool translate)
 129 {
 130         int na, ns;
 131
 132         debug("%s: ", __func__);
 133
 134         na = fdt_address_cells(blob, parent);
 135         if (na < 1) {
 136                 debug("(bad #address-cells)\n");
 137                 return FDT_ADDR_T_NONE;
 138         }
 139
 140         ns = fdt_size_cells(blob, parent);
 141         if (ns < 0) {
 142                 debug("(bad #size-cells)\n");
 143                 return FDT_ADDR_T_NONE;
 144         }
 145
 146         debug("na=%d, ns=%d, ", na, ns);
 147
 148         return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na,
 149                                           ns, sizep, translate);
 150 }
 151
 152 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node,
 153                                               const char *prop_name, int index,
 154                                               fdt_size_t *sizep,
 155                                               bool translate)
 156 {
 157         int parent;
 158
 159         debug("%s: ", __func__);
 160
 161         parent = fdt_parent_offset(blob, node);
 162         if (parent < 0) {
 163                 debug("(no parent found)\n");
 164                 return FDT_ADDR_T_NONE;
 165         }
 166
 167         return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name,
 168                                                 index, sizep, translate);
 169 }
 170
 171 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
 172                                 const char *prop_name, fdt_size_t *sizep)
 173 {
 174         int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0;
 175
 176         return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0,
 177                                           sizeof(fdt_addr_t) / sizeof(fdt32_t),
 178                                           ns, sizep, false);
 179 }
 180
 181 fdt_addr_t fdtdec_get_addr(const void *blob, int node, const char *prop_name)
 182 {
 183         return fdtdec_get_addr_size(blob, node, prop_name, NULL);
 184 }
 185
 186 #if CONFIG_IS_ENABLED(PCI) && defined(CONFIG_DM_PCI)
 187 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
 188                         const char *prop_name, struct fdt_pci_addr *addr)
 189 {
 190         const u32 *cell;
 191         int len;
 192         int ret = -ENOENT;
 193
 194         debug("%s: %s: ", __func__, prop_name);
 195
 196         /*
 197          * If we follow the pci bus bindings strictly, we should check
 198          * the value of the node's parent node's #address-cells and
 199          * #size-cells. They need to be 3 and 2 accordingly. However,
 200          * for simplicity we skip the check here.
 201          */
 202         cell = fdt_getprop(blob, node, prop_name, &len);
 203         if (!cell)
 204                 goto fail;
 205
 206         if ((len % FDT_PCI_REG_SIZE) == 0) {
 207                 int num = len / FDT_PCI_REG_SIZE;
 208                 int i;
 209
 210                 for (i = 0; i < num; i++) {
 211                         debug("pci address #%d: %08lx %08lx %08lx\n", i,
 212                               (ulong)fdt32_to_cpu(cell[0]),
 213                               (ulong)fdt32_to_cpu(cell[1]),
 214                               (ulong)fdt32_to_cpu(cell[2]));
 215                         if ((fdt32_to_cpu(*cell) & type) == type) {
 216                                 addr->phys_hi = fdt32_to_cpu(cell[0]);
 217                                 addr->phys_mid = fdt32_to_cpu(cell[1]);
 218                                 addr->phys_lo = fdt32_to_cpu(cell[1]);
 219                                 break;
 220                         }
 221
 222                         cell += (FDT_PCI_ADDR_CELLS +
 223                                  FDT_PCI_SIZE_CELLS);
 224                 }
 225
 226                 if (i == num) {
 227                         ret = -ENXIO;
 228                         goto fail;
 229                 }
 230
 231                 return 0;
 232         }
 233
 234         ret = -EINVAL;
 235
 236 fail:
 237         debug("(not found)\n");
 238         return ret;
 239 }
 240
 241 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
 242 {
 243         const char *list, *end;
 244         int len;
 245
 246         list = fdt_getprop(blob, node, "compatible", &len);
 247         if (!list)
 248                 return -ENOENT;
 249
 250         end = list + len;
 251         while (list < end) {
 252                 len = strlen(list);
 253                 if (len >= strlen("pciVVVV,DDDD")) {
 254                         char *s = strstr(list, "pci");
 255
 256                         /*
 257                          * check if the string is something like pciVVVV,DDDD.RR
 258                          * or just pciVVVV,DDDD
 259                          */
 260                         if (s && s[7] == ',' &&
 261                             (s[12] == '.' || s[12] == 0)) {
 262                                 s += 3;
 263                                 *vendor = simple_strtol(s, NULL, 16);
 264
 265                                 s += 5;
 266                                 *device = simple_strtol(s, NULL, 16);
 267
 268                                 return 0;
 269                         }
 270                 }
 271                 list += (len + 1);
 272         }
 273
 274         return -ENOENT;
 275 }
 276
 277 int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr,
 278                          u32 *bar)
 279 {
 280         int barnum;
 281
 282         /* extract the bar number from fdt_pci_addr */
 283         barnum = addr->phys_hi & 0xff;
 284         if (barnum < PCI_BASE_ADDRESS_0 || barnum > PCI_CARDBUS_CIS)
 285                 return -EINVAL;
 286
 287         barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
 288         *bar = dm_pci_read_bar32(dev, barnum);
 289
 290         return 0;
 291 }
 292 #endif
 293
 294 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
 295                            uint64_t default_val)
 296 {
 297         const uint64_t *cell64;
 298         int length;
 299
 300         cell64 = fdt_getprop(blob, node, prop_name, &length);
 301         if (!cell64 || length < sizeof(*cell64))
 302                 return default_val;
 303
 304         return fdt64_to_cpu(*cell64);
 305 }
 306
 307 int fdtdec_get_is_enabled(const void *blob, int node)
 308 {
 309         const char *cell;
 310
 311         /*
 312          * It should say "okay", so only allow that. Some fdts use "ok" but
 313          * this is a bug. Please fix your device tree source file. See here
 314          * for discussion:
 315          *
 316          * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
 317          */
 318         cell = fdt_getprop(blob, node, "status", NULL);
 319         if (cell)
 320                 return strcmp(cell, "okay") == 0;
 321         return 1;
 322 }
 323
 324 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
 325 {
 326         enum fdt_compat_id id;
 327
 328         /* Search our drivers */
 329         for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
 330                 if (fdt_node_check_compatible(blob, node,
 331                                               compat_names[id]) == 0)
 332                         return id;
 333         return COMPAT_UNKNOWN;
 334 }
 335
 336 int fdtdec_next_compatible(const void *blob, int node, enum fdt_compat_id id)
 337 {
 338         return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
 339 }
 340
 341 int fdtdec_next_compatible_subnode(const void *blob, int node,
 342                                    enum fdt_compat_id id, int *depthp)
 343 {
 344         do {
 345                 node = fdt_next_node(blob, node, depthp);
 346         } while (*depthp > 1);
 347
 348         /* If this is a direct subnode, and compatible, return it */
 349         if (*depthp == 1 && 0 == fdt_node_check_compatible(
 350                                                 blob, node, compat_names[id]))
 351                 return node;
 352
 353         return -FDT_ERR_NOTFOUND;
 354 }
 355
 356 int fdtdec_next_alias(const void *blob, const char *name, enum fdt_compat_id id,
 357                       int *upto)
 358 {
 359 #define MAX_STR_LEN 20
 360         char str[MAX_STR_LEN + 20];
 361         int node, err;
 362
 363         /* snprintf() is not available */
 364         assert(strlen(name) < MAX_STR_LEN);
 365         sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
 366         node = fdt_path_offset(blob, str);
 367         if (node < 0)
 368                 return node;
 369         err = fdt_node_check_compatible(blob, node, compat_names[id]);
 370         if (err < 0)
 371                 return err;
 372         if (err)
 373                 return -FDT_ERR_NOTFOUND;
 374         (*upto)++;
 375         return node;
 376 }
 377
 378 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
 379                                enum fdt_compat_id id, int *node_list,
 380                                int maxcount)
 381 {
 382         memset(node_list, '\0', sizeof(*node_list) * maxcount);
 383
 384         return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
 385 }
 386
 387 /* TODO: Can we tighten this code up a little? */
 388 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
 389                               enum fdt_compat_id id, int *node_list,
 390                               int maxcount)
 391 {
 392         int name_len = strlen(name);
 393         int nodes[maxcount];
 394         int num_found = 0;
 395         int offset, node;
 396         int alias_node;
 397         int count;
 398         int i, j;
 399
 400         /* find the alias node if present */
 401         alias_node = fdt_path_offset(blob, "/aliases");
 402
 403         /*
 404          * start with nothing, and we can assume that the root node can't
 405          * match
 406          */
 407         memset(nodes, '\0', sizeof(nodes));
 408
 409         /* First find all the compatible nodes */
 410         for (node = count = 0; node >= 0 && count < maxcount;) {
 411                 node = fdtdec_next_compatible(blob, node, id);
 412                 if (node >= 0)
 413                         nodes[count++] = node;
 414         }
 415         if (node >= 0)
 416                 debug("%s: warning: maxcount exceeded with alias '%s'\n",
 417                       __func__, name);
 418
 419         /* Now find all the aliases */
 420         for (offset = fdt_first_property_offset(blob, alias_node);
 421                         offset > 0;
 422                         offset = fdt_next_property_offset(blob, offset)) {
 423                 const struct fdt_property *prop;
 424                 const char *path;
 425                 int number;
 426                 int found;
 427
 428                 node = 0;
 429                 prop = fdt_get_property_by_offset(blob, offset, NULL);
 430                 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
 431                 if (prop->len && 0 == strncmp(path, name, name_len))
 432                         node = fdt_path_offset(blob, prop->data);
 433                 if (node <= 0)
 434                         continue;
 435
 436                 /* Get the alias number */
 437                 number = simple_strtoul(path + name_len, NULL, 10);
 438                 if (number < 0 || number >= maxcount) {
 439                         debug("%s: warning: alias '%s' is out of range\n",
 440                               __func__, path);
 441                         continue;
 442                 }
 443
 444                 /* Make sure the node we found is actually in our list! */
 445                 found = -1;
 446                 for (j = 0; j < count; j++)
 447                         if (nodes[j] == node) {
 448                                 found = j;
 449                                 break;
 450                         }
 451
 452                 if (found == -1) {
 453                         debug("%s: warning: alias '%s' points to a node "
 454                                 "'%s' that is missing or is not compatible "
 455                                 " with '%s'\n", __func__, path,
 456                                 fdt_get_name(blob, node, NULL),
 457                                compat_names[id]);
 458                         continue;
 459                 }
 460
 461                 /*
 462                  * Add this node to our list in the right place, and mark
 463                  * it as done.
 464                  */
 465                 if (fdtdec_get_is_enabled(blob, node)) {
 466                         if (node_list[number]) {
 467                                 debug("%s: warning: alias '%s' requires that "
 468                                       "a node be placed in the list in a "
 469                                       "position which is already filled by "
 470                                       "node '%s'\n", __func__, path,
 471                                       fdt_get_name(blob, node, NULL));
 472                                 continue;
 473                         }
 474                         node_list[number] = node;
 475                         if (number >= num_found)
 476                                 num_found = number + 1;
 477                 }
 478                 nodes[found] = 0;
 479         }
 480
 481         /* Add any nodes not mentioned by an alias */
 482         for (i = j = 0; i < maxcount; i++) {
 483                 if (!node_list[i]) {
 484                         for (; j < maxcount; j++)
 485                                 if (nodes[j] &&
 486                                     fdtdec_get_is_enabled(blob, nodes[j]))
 487                                         break;
 488
 489                         /* Have we run out of nodes to add? */
 490                         if (j == maxcount)
 491                                 break;
 492
 493                         assert(!node_list[i]);
 494                         node_list[i] = nodes[j++];
 495                         if (i >= num_found)
 496                                 num_found = i + 1;
 497                 }
 498         }
 499
 500         return num_found;
 501 }
 502
 503 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
 504                          int *seqp)
 505 {
 506         int base_len = strlen(base);
 507         const char *find_name;
 508         int find_namelen;
 509         int prop_offset;
 510         int aliases;
 511
 512         find_name = fdt_get_name(blob, offset, &find_namelen);
 513         debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
 514
 515         aliases = fdt_path_offset(blob, "/aliases");
 516         for (prop_offset = fdt_first_property_offset(blob, aliases);
 517              prop_offset > 0;
 518              prop_offset = fdt_next_property_offset(blob, prop_offset)) {
 519                 const char *prop;
 520                 const char *name;
 521                 const char *slash;
 522                 int len, val;
 523
 524                 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
 525                 debug("   - %s, %s\n", name, prop);
 526                 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
 527                     strncmp(name, base, base_len))
 528                         continue;
 529
 530                 slash = strrchr(prop, '/');
 531                 if (strcmp(slash + 1, find_name))
 532                         continue;
 533                 val = trailing_strtol(name);
 534                 if (val != -1) {
 535                         *seqp = val;
 536                         debug("Found seq %d\n", *seqp);
 537                         return 0;
 538                 }
 539         }
 540
 541         debug("Not found\n");
 542         return -ENOENT;
 543 }
 544
 545 int fdtdec_get_alias_highest_id(const void *blob, const char *base)
 546 {
 547         int base_len = strlen(base);
 548         int prop_offset;
 549         int aliases;
 550         int max = -1;
 551
 552         debug("Looking for highest alias id for '%s'\n", base);
 553
 554         aliases = fdt_path_offset(blob, "/aliases");
 555         for (prop_offset = fdt_first_property_offset(blob, aliases);
 556              prop_offset > 0;
 557              prop_offset = fdt_next_property_offset(blob, prop_offset)) {
 558                 const char *prop;
 559                 const char *name;
 560                 int len, val;
 561
 562                 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
 563                 debug("   - %s, %s\n", name, prop);
 564                 if (*prop != '/' || prop[len - 1] ||
 565                     strncmp(name, base, base_len))
 566                         continue;
 567
 568                 val = trailing_strtol(name);
 569                 if (val > max) {
 570                         debug("Found seq %d\n", val);
 571                         max = val;
 572                 }
 573         }
 574
 575         return max;
 576 }
 577
 578 const char *fdtdec_get_chosen_prop(const void *blob, const char *name)
 579 {
 580         int chosen_node;
 581
 582         if (!blob)
 583                 return NULL;
 584         chosen_node = fdt_path_offset(blob, "/chosen");
 585         return fdt_getprop(blob, chosen_node, name, NULL);
 586 }
 587
 588 int fdtdec_get_chosen_node(const void *blob, const char *name)
 589 {
 590         const char *prop;
 591
 592         prop = fdtdec_get_chosen_prop(blob, name);
 593         if (!prop)
 594                 return -FDT_ERR_NOTFOUND;
 595         return fdt_path_offset(blob, prop);
 596 }
 597
 598 int fdtdec_check_fdt(void)
 599 {
 600         /*
 601          * We must have an FDT, but we cannot panic() yet since the console
 602          * is not ready. So for now, just assert(). Boards which need an early
 603          * FDT (prior to console ready) will need to make their own
 604          * arrangements and do their own checks.
 605          */
 606         assert(!fdtdec_prepare_fdt());
 607         return 0;
 608 }
 609
 610 /*
 611  * This function is a little odd in that it accesses global data. At some
 612  * point if the architecture board.c files merge this will make more sense.
 613  * Even now, it is common code.
 614  */
 615 int fdtdec_prepare_fdt(void)
 616 {
 617         if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
 618             fdt_check_header(gd->fdt_blob)) {
 619 #ifdef CONFIG_SPL_BUILD
 620                 puts("Missing DTB\n");
 621 #else
 622                 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");
 623 # ifdef DEBUG
 624                 if (gd->fdt_blob) {
 625                         printf("fdt_blob=%p\n", gd->fdt_blob);
 626                         print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
 627                                      32, 0);
 628                 }
 629 # endif
 630 #endif
 631                 return -1;
 632         }
 633         return 0;
 634 }
 635
 636 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
 637 {
 638         const u32 *phandle;
 639         int lookup;
 640
 641         debug("%s: %s\n", __func__, prop_name);
 642         phandle = fdt_getprop(blob, node, prop_name, NULL);
 643         if (!phandle)
 644                 return -FDT_ERR_NOTFOUND;
 645
 646         lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
 647         return lookup;
 648 }
 649
 650 /**
 651  * Look up a property in a node and check that it has a minimum length.
 652  *
 653  * @param blob          FDT blob
 654  * @param node          node to examine
 655  * @param prop_name     name of property to find
 656  * @param min_len       minimum property length in bytes
 657  * @param err           0 if ok, or -FDT_ERR_NOTFOUND if the property is not
 658                         found, or -FDT_ERR_BADLAYOUT if not enough data
 659  * @return pointer to cell, which is only valid if err == 0
 660  */
 661 static const void *get_prop_check_min_len(const void *blob, int node,
 662                                           const char *prop_name, int min_len,
 663                                           int *err)
 664 {
 665         const void *cell;
 666         int len;
 667
 668         debug("%s: %s\n", __func__, prop_name);
 669         cell = fdt_getprop(blob, node, prop_name, &len);
 670         if (!cell)
 671                 *err = -FDT_ERR_NOTFOUND;
 672         else if (len < min_len)
 673                 *err = -FDT_ERR_BADLAYOUT;
 674         else
 675                 *err = 0;
 676         return cell;
 677 }
 678
 679 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
 680                          u32 *array, int count)
 681 {
 682         const u32 *cell;
 683         int err = 0;
 684
 685         debug("%s: %s\n", __func__, prop_name);
 686         cell = get_prop_check_min_len(blob, node, prop_name,
 687                                       sizeof(u32) * count, &err);
 688         if (!err) {
 689                 int i;
 690
 691                 for (i = 0; i < count; i++)
 692                         array[i] = fdt32_to_cpu(cell[i]);
 693         }
 694         return err;
 695 }
 696
 697 int fdtdec_get_int_array_count(const void *blob, int node,
 698                                const char *prop_name, u32 *array, int count)
 699 {
 700         const u32 *cell;
 701         int len, elems;
 702         int i;
 703
 704         debug("%s: %s\n", __func__, prop_name);
 705         cell = fdt_getprop(blob, node, prop_name, &len);
 706         if (!cell)
 707                 return -FDT_ERR_NOTFOUND;
 708         elems = len / sizeof(u32);
 709         if (count > elems)
 710                 count = elems;
 711         for (i = 0; i < count; i++)
 712                 array[i] = fdt32_to_cpu(cell[i]);
 713
 714         return count;
 715 }
 716
 717 const u32 *fdtdec_locate_array(const void *blob, int node,
 718                                const char *prop_name, int count)
 719 {
 720         const u32 *cell;
 721         int err;
 722
 723         cell = get_prop_check_min_len(blob, node, prop_name,
 724                                       sizeof(u32) * count, &err);
 725         return err ? NULL : cell;
 726 }
 727
 728 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
 729 {
 730         const s32 *cell;
 731         int len;
 732
 733         debug("%s: %s\n", __func__, prop_name);
 734         cell = fdt_getprop(blob, node, prop_name, &len);
 735         return cell != NULL;
 736 }
 737
 738 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
 739                                    const char *list_name,
 740                                    const char *cells_name,
 741                                    int cell_count, int index,
 742                                    struct fdtdec_phandle_args *out_args)
 743 {
 744         const __be32 *list, *list_end;
 745         int rc = 0, size, cur_index = 0;
 746         uint32_t count = 0;
 747         int node = -1;
 748         int phandle;
 749
 750         /* Retrieve the phandle list property */
 751         list = fdt_getprop(blob, src_node, list_name, &size);
 752         if (!list)
 753                 return -ENOENT;
 754         list_end = list + size / sizeof(*list);
 755
 756         /* Loop over the phandles until all the requested entry is found */
 757         while (list < list_end) {
 758                 rc = -EINVAL;
 759                 count = 0;
 760
 761                 /*
 762                  * If phandle is 0, then it is an empty entry with no
 763                  * arguments.  Skip forward to the next entry.
 764                  */
 765                 phandle = be32_to_cpup(list++);
 766                 if (phandle) {
 767                         /*
 768                          * Find the provider node and parse the #*-cells
 769                          * property to determine the argument length.
 770                          *
 771                          * This is not needed if the cell count is hard-coded
 772                          * (i.e. cells_name not set, but cell_count is set),
 773                          * except when we're going to return the found node
 774                          * below.
 775                          */
 776                         if (cells_name || cur_index == index) {
 777                                 node = fdt_node_offset_by_phandle(blob,
 778                                                                   phandle);
 779                                 if (!node) {
 780                                         debug("%s: could not find phandle\n",
 781                                               fdt_get_name(blob, src_node,
 782                                                            NULL));
 783                                         goto err;
 784                                 }
 785                         }
 786
 787                         if (cells_name) {
 788                                 count = fdtdec_get_int(blob, node, cells_name,
 789                                                        -1);
 790                                 if (count == -1) {
 791                                         debug("%s: could not get %s for %s\n",
 792                                               fdt_get_name(blob, src_node,
 793                                                            NULL),
 794                                               cells_name,
 795                                               fdt_get_name(blob, node,
 796                                                            NULL));
 797                                         goto err;
 798                                 }
 799                         } else {
 800                                 count = cell_count;
 801                         }
 802
 803                         /*
 804                          * Make sure that the arguments actually fit in the
 805                          * remaining property data length
 806                          */
 807                         if (list + count > list_end) {
 808                                 debug("%s: arguments longer than property\n",
 809                                       fdt_get_name(blob, src_node, NULL));
 810                                 goto err;
 811                         }
 812                 }
 813
 814                 /*
 815                  * All of the error cases above bail out of the loop, so at
 816                  * this point, the parsing is successful. If the requested
 817                  * index matches, then fill the out_args structure and return,
 818                  * or return -ENOENT for an empty entry.
 819                  */
 820                 rc = -ENOENT;
 821                 if (cur_index == index) {
 822                         if (!phandle)
 823                                 goto err;
 824
 825                         if (out_args) {
 826                                 int i;
 827
 828                                 if (count > MAX_PHANDLE_ARGS) {
 829                                         debug("%s: too many arguments %d\n",
 830                                               fdt_get_name(blob, src_node,
 831                                                            NULL), count);
 832                                         count = MAX_PHANDLE_ARGS;
 833                                 }
 834                                 out_args->node = node;
 835                                 out_args->args_count = count;
 836                                 for (i = 0; i < count; i++) {
 837                                         out_args->args[i] =
 838                                                         be32_to_cpup(list++);
 839                                 }
 840                         }
 841
 842                         /* Found it! return success */
 843                         return 0;
 844                 }
 845
 846                 node = -1;
 847                 list += count;
 848                 cur_index++;
 849         }
 850
 851         /*
 852          * Result will be one of:
 853          * -ENOENT : index is for empty phandle
 854          * -EINVAL : parsing error on data
 855          * [1..n]  : Number of phandle (count mode; when index = -1)
 856          */
 857         rc = index < 0 ? cur_index : -ENOENT;
 858  err:
 859         return rc;
 860 }
 861
 862 int fdtdec_get_child_count(const void *blob, int node)
 863 {
 864         int subnode;
 865         int num = 0;
 866
 867         fdt_for_each_subnode(subnode, blob, node)
 868                 num++;
 869
 870         return num;
 871 }
 872
 873 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
 874                           u8 *array, int count)
 875 {
 876         const u8 *cell;
 877         int err;
 878
 879         cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
 880         if (!err)
 881                 memcpy(array, cell, count);
 882         return err;
 883 }
 884
 885 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
 886                                    const char *prop_name, int count)
 887 {
 888         const u8 *cell;
 889         int err;
 890
 891         cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
 892         if (err)
 893                 return NULL;
 894         return cell;
 895 }
 896
 897 int fdtdec_get_config_int(const void *blob, const char *prop_name,
 898                           int default_val)
 899 {
 900         int config_node;
 901
 902         debug("%s: %s\n", __func__, prop_name);
 903         config_node = fdt_path_offset(blob, "/config");
 904         if (config_node < 0)
 905                 return default_val;
 906         return fdtdec_get_int(blob, config_node, prop_name, default_val);
 907 }
 908
 909 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
 910 {
 911         int config_node;
 912         const void *prop;
 913
 914         debug("%s: %s\n", __func__, prop_name);
 915         config_node = fdt_path_offset(blob, "/config");
 916         if (config_node < 0)
 917                 return 0;
 918         prop = fdt_get_property(blob, config_node, prop_name, NULL);
 919
 920         return prop != NULL;
 921 }
 922
 923 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
 924 {
 925         const char *nodep;
 926         int nodeoffset;
 927         int len;
 928
 929         debug("%s: %s\n", __func__, prop_name);
 930         nodeoffset = fdt_path_offset(blob, "/config");
 931         if (nodeoffset < 0)
 932                 return NULL;
 933
 934         nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
 935         if (!nodep)
 936                 return NULL;
 937
 938         return (char *)nodep;
 939 }
 940
 941 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
 942 {
 943         u64 number = 0;
 944
 945         while (cells--)
 946                 number = (number << 32) | fdt32_to_cpu(*ptr++);
 947
 948         return number;
 949 }
 950
 951 int fdt_get_resource(const void *fdt, int node, const char *property,
 952                      unsigned int index, struct fdt_resource *res)
 953 {
 954         const fdt32_t *ptr, *end;
 955         int na, ns, len, parent;
 956         unsigned int i = 0;
 957
 958         parent = fdt_parent_offset(fdt, node);
 959         if (parent < 0)
 960                 return parent;
 961
 962         na = fdt_address_cells(fdt, parent);
 963         ns = fdt_size_cells(fdt, parent);
 964
 965         ptr = fdt_getprop(fdt, node, property, &len);
 966         if (!ptr)
 967                 return len;
 968
 969         end = ptr + len / sizeof(*ptr);
 970
 971         while (ptr + na + ns <= end) {
 972                 if (i == index) {
 973                         res->start = fdtdec_get_number(ptr, na);
 974                         res->end = res->start;
 975                         res->end += fdtdec_get_number(&ptr[na], ns) - 1;
 976                         return 0;
 977                 }
 978
 979                 ptr += na + ns;
 980                 i++;
 981         }
 982
 983         return -FDT_ERR_NOTFOUND;
 984 }
 985
 986 int fdt_get_named_resource(const void *fdt, int node, const char *property,
 987                            const char *prop_names, const char *name,
 988                            struct fdt_resource *res)
 989 {
 990         int index;
 991
 992         index = fdt_stringlist_search(fdt, node, prop_names, name);
 993         if (index < 0)
 994                 return index;
 995
 996         return fdt_get_resource(fdt, node, property, index, res);
 997 }
 998
 999 static int decode_timing_property(const void *blob, int node, const char *name,
1000                                   struct timing_entry *result)
1001 {
1002         int length, ret = 0;
1003         const u32 *prop;
1004
1005         prop = fdt_getprop(blob, node, name, &length);
1006         if (!prop) {
1007                 debug("%s: could not find property %s\n",
1008                       fdt_get_name(blob, node, NULL), name);
1009                 return length;
1010         }
1011
1012         if (length == sizeof(u32)) {
1013                 result->typ = fdtdec_get_int(blob, node, name, 0);
1014                 result->min = result->typ;
1015                 result->max = result->typ;
1016         } else {
1017                 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
1018         }
1019
1020         return ret;
1021 }
1022
1023 int fdtdec_decode_display_timing(const void *blob, int parent, int index,
1024                                  struct display_timing *dt)
1025 {
1026         int i, node, timings_node;
1027         u32 val = 0;
1028         int ret = 0;
1029
1030         timings_node = fdt_subnode_offset(blob, parent, "display-timings");
1031         if (timings_node < 0)
1032                 return timings_node;
1033
1034         for (i = 0, node = fdt_first_subnode(blob, timings_node);
1035              node > 0 && i != index;
1036              node = fdt_next_subnode(blob, node))
1037                 i++;
1038
1039         if (node < 0)
1040                 return node;
1041
1042         memset(dt, 0, sizeof(*dt));
1043
1044         ret |= decode_timing_property(blob, node, "hback-porch",
1045                                       &dt->hback_porch);
1046         ret |= decode_timing_property(blob, node, "hfront-porch",
1047                                       &dt->hfront_porch);
1048         ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
1049         ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
1050         ret |= decode_timing_property(blob, node, "vback-porch",
1051                                       &dt->vback_porch);
1052         ret |= decode_timing_property(blob, node, "vfront-porch",
1053                                       &dt->vfront_porch);
1054         ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
1055         ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
1056         ret |= decode_timing_property(blob, node, "clock-frequency",
1057                                       &dt->pixelclock);
1058
1059         dt->flags = 0;
1060         val = fdtdec_get_int(blob, node, "vsync-active", -1);
1061         if (val != -1) {
1062                 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1063                                 DISPLAY_FLAGS_VSYNC_LOW;
1064         }
1065         val = fdtdec_get_int(blob, node, "hsync-active", -1);
1066         if (val != -1) {
1067                 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1068                                 DISPLAY_FLAGS_HSYNC_LOW;
1069         }
1070         val = fdtdec_get_int(blob, node, "de-active", -1);
1071         if (val != -1) {
1072                 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1073                                 DISPLAY_FLAGS_DE_LOW;
1074         }
1075         val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1076         if (val != -1) {
1077                 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1078                                 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1079         }
1080
1081         if (fdtdec_get_bool(blob, node, "interlaced"))
1082                 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1083         if (fdtdec_get_bool(blob, node, "doublescan"))
1084                 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1085         if (fdtdec_get_bool(blob, node, "doubleclk"))
1086                 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1087
1088         return ret;
1089 }
1090
1091 int fdtdec_setup_mem_size_base_fdt(const void *blob)
1092 {
1093         int ret, mem;
1094         struct fdt_resource res;
1095
1096         mem = fdt_path_offset(blob, "/memory");
1097         if (mem < 0) {
1098                 debug("%s: Missing /memory node\n", __func__);
1099                 return -EINVAL;
1100         }
1101
1102         ret = fdt_get_resource(blob, mem, "reg", 0, &res);
1103         if (ret != 0) {
1104                 debug("%s: Unable to decode first memory bank\n", __func__);
1105                 return -EINVAL;
1106         }
1107
1108         gd->ram_size = (phys_size_t)(res.end - res.start + 1);
1109         gd->ram_base = (unsigned long)res.start;
1110         debug("%s: Initial DRAM size %llx\n", __func__,
1111               (unsigned long long)gd->ram_size);
1112
1113         return 0;
1114 }
1115
1116 int fdtdec_setup_mem_size_base(void)
1117 {
1118         return fdtdec_setup_mem_size_base_fdt(gd->fdt_blob);
1119 }
1120
1121 #if defined(CONFIG_NR_DRAM_BANKS)
1122
1123 static int get_next_memory_node(const void *blob, int mem)
1124 {
1125         do {
1126                 mem = fdt_node_offset_by_prop_value(blob, mem,
1127                                                     "device_type", "memory", 7);
1128         } while (!fdtdec_get_is_enabled(blob, mem));
1129
1130         return mem;
1131 }
1132
1133 int fdtdec_setup_memory_banksize_fdt(const void *blob)
1134 {
1135         int bank, ret, mem, reg = 0;
1136         struct fdt_resource res;
1137
1138         mem = get_next_memory_node(blob, -1);
1139         if (mem < 0) {
1140                 debug("%s: Missing /memory node\n", __func__);
1141                 return -EINVAL;
1142         }
1143
1144         for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
1145                 ret = fdt_get_resource(blob, mem, "reg", reg++, &res);
1146                 if (ret == -FDT_ERR_NOTFOUND) {
1147                         reg = 0;
1148                         mem = get_next_memory_node(blob, mem);
1149                         if (mem == -FDT_ERR_NOTFOUND)
1150                                 break;
1151
1152                         ret = fdt_get_resource(blob, mem, "reg", reg++, &res);
1153                         if (ret == -FDT_ERR_NOTFOUND)
1154                                 break;
1155                 }
1156                 if (ret != 0) {
1157                         return -EINVAL;
1158                 }
1159
1160                 gd->bd->bi_dram[bank].start = (phys_addr_t)res.start;
1161                 gd->bd->bi_dram[bank].size =
1162                         (phys_size_t)(res.end - res.start + 1);
1163
1164                 debug("%s: DRAM Bank #%d: start = 0x%llx, size = 0x%llx\n",
1165                       __func__, bank,
1166                       (unsigned long long)gd->bd->bi_dram[bank].start,
1167                       (unsigned long long)gd->bd->bi_dram[bank].size);
1168         }
1169
1170         return 0;
1171 }
1172
1173 int fdtdec_setup_memory_banksize(void)
1174 {
1175         return fdtdec_setup_memory_banksize_fdt(gd->fdt_blob);
1176
1177 }
1178 #endif
1179
1180 #if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
1181 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT_GZIP) ||\
1182         CONFIG_IS_ENABLED(MULTI_DTB_FIT_LZO)
1183 static int uncompress_blob(const void *src, ulong sz_src, void **dstp)
1184 {
1185         size_t sz_out = CONFIG_VAL(MULTI_DTB_FIT_UNCOMPRESS_SZ);
1186         bool gzip = 0, lzo = 0;
1187         ulong sz_in = sz_src;
1188         void *dst;
1189         int rc;
1190
1191         if (CONFIG_IS_ENABLED(GZIP))
1192                 if (gzip_parse_header(src, sz_in) >= 0)
1193                         gzip = 1;
1194         if (CONFIG_IS_ENABLED(LZO))
1195                 if (!gzip && lzop_is_valid_header(src))
1196                         lzo = 1;
1197
1198         if (!gzip && !lzo)
1199                 return -EBADMSG;
1200
1201
1202         if (CONFIG_IS_ENABLED(MULTI_DTB_FIT_DYN_ALLOC)) {
1203                 dst = malloc(sz_out);
1204                 if (!dst) {
1205                         puts("uncompress_blob: Unable to allocate memory\n");
1206                         return -ENOMEM;
1207                 }
1208         } else  {
1209 #  if CONFIG_IS_ENABLED(MULTI_DTB_FIT_USER_DEFINED_AREA)
1210                 dst = (void *)CONFIG_VAL(MULTI_DTB_FIT_USER_DEF_ADDR);
1211 #  else
1212                 return -ENOTSUPP;
1213 #  endif
1214         }
1215
1216         if (CONFIG_IS_ENABLED(GZIP) && gzip)
1217                 rc = gunzip(dst, sz_out, (u8 *)src, &sz_in);
1218         else if (CONFIG_IS_ENABLED(LZO) && lzo)
1219                 rc = lzop_decompress(src, sz_in, dst, &sz_out);
1220         else
1221                 hang();
1222
1223         if (rc < 0) {
1224                 /* not a valid compressed blob */
1225                 puts("uncompress_blob: Unable to uncompress\n");
1226                 if (CONFIG_IS_ENABLED(MULTI_DTB_FIT_DYN_ALLOC))
1227                         free(dst);
1228                 return -EBADMSG;
1229         }
1230         *dstp = dst;
1231         return 0;
1232 }
1233 # else
1234 static int uncompress_blob(const void *src, ulong sz_src, void **dstp)
1235 {
1236         *dstp = (void *)src;
1237         return 0;
1238 }
1239 # endif
1240 #endif
1241
1242 #if defined(CONFIG_OF_BOARD) || defined(CONFIG_OF_SEPARATE)
1243 /*
1244  * For CONFIG_OF_SEPARATE, the board may optionally implement this to
1245  * provide and/or fixup the fdt.
1246  */
1247 __weak void *board_fdt_blob_setup(void)
1248 {
1249         void *fdt_blob = NULL;
1250 #ifdef CONFIG_SPL_BUILD
1251         /* FDT is at end of BSS unless it is in a different memory region */
1252         if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
1253                 fdt_blob = (ulong *)&_image_binary_end;
1254         else
1255                 fdt_blob = (ulong *)&__bss_end;
1256 #else
1257         /* FDT is at end of image */
1258         fdt_blob = (ulong *)&_end;
1259 #endif
1260         return fdt_blob;
1261 }
1262 #endif
1263
1264 int fdtdec_set_ethernet_mac_address(void *fdt, const u8 *mac, size_t size)
1265 {
1266         const char *path;
1267         int offset, err;
1268
1269         if (!is_valid_ethaddr(mac))
1270                 return -EINVAL;
1271
1272         path = fdt_get_alias(fdt, "ethernet");
1273         if (!path)
1274                 return 0;
1275
1276         debug("ethernet alias found: %s\n", path);
1277
1278         offset = fdt_path_offset(fdt, path);
1279         if (offset < 0) {
1280                 debug("ethernet alias points to absent node %s\n", path);
1281                 return -ENOENT;
1282         }
1283
1284         err = fdt_setprop_inplace(fdt, offset, "local-mac-address", mac, size);
1285         if (err < 0)
1286                 return err;
1287
1288         debug("MAC address: %pM\n", mac);
1289
1290         return 0;
1291 }
1292
1293 static int fdtdec_init_reserved_memory(void *blob)
1294 {
1295         int na, ns, node, err;
1296         fdt32_t value;
1297
1298         /* inherit #address-cells and #size-cells from the root node */
1299         na = fdt_address_cells(blob, 0);
1300         ns = fdt_size_cells(blob, 0);
1301
1302         node = fdt_add_subnode(blob, 0, "reserved-memory");
1303         if (node < 0)
1304                 return node;
1305
1306         err = fdt_setprop(blob, node, "ranges", NULL, 0);
1307         if (err < 0)
1308                 return err;
1309
1310         value = cpu_to_fdt32(ns);
1311
1312         err = fdt_setprop(blob, node, "#size-cells", &value, sizeof(value));
1313         if (err < 0)
1314                 return err;
1315
1316         value = cpu_to_fdt32(na);
1317
1318         err = fdt_setprop(blob, node, "#address-cells", &value, sizeof(value));
1319         if (err < 0)
1320                 return err;
1321
1322         return node;
1323 }
1324
1325 int fdtdec_add_reserved_memory(void *blob, const char *basename,
1326                                const struct fdt_memory *carveout,
1327                                uint32_t *phandlep)
1328 {
1329         fdt32_t cells[4] = {}, *ptr = cells;
1330         uint32_t upper, lower, phandle;
1331         int parent, node, na, ns, err;
1332         fdt_size_t size;
1333         char name[64];
1334
1335         /* create an empty /reserved-memory node if one doesn't exist */
1336         parent = fdt_path_offset(blob, "/reserved-memory");
1337         if (parent < 0) {
1338                 parent = fdtdec_init_reserved_memory(blob);
1339                 if (parent < 0)
1340                         return parent;
1341         }
1342
1343         /* only 1 or 2 #address-cells and #size-cells are supported */
1344         na = fdt_address_cells(blob, parent);
1345         if (na < 1 || na > 2)
1346                 return -FDT_ERR_BADNCELLS;
1347
1348         ns = fdt_size_cells(blob, parent);
1349         if (ns < 1 || ns > 2)
1350                 return -FDT_ERR_BADNCELLS;
1351
1352         /* find a matching node and return the phandle to that */
1353         fdt_for_each_subnode(node, blob, parent) {
1354                 const char *name = fdt_get_name(blob, node, NULL);
1355                 phys_addr_t addr, size;
1356
1357                 addr = fdtdec_get_addr_size(blob, node, "reg", &size);
1358                 if (addr == FDT_ADDR_T_NONE) {
1359                         debug("failed to read address/size for %s\n", name);
1360                         continue;
1361                 }
1362
1363                 if (addr == carveout->start && (addr + size) == carveout->end) {
1364                         *phandlep = fdt_get_phandle(blob, node);
1365                         return 0;
1366                 }
1367         }
1368
1369         /*
1370          * Unpack the start address and generate the name of the new node
1371          * base on the basename and the unit-address.
1372          */
1373         upper = upper_32_bits(carveout->start);
1374         lower = lower_32_bits(carveout->start);
1375
1376         if (na > 1 && upper > 0)
1377                 snprintf(name, sizeof(name), "%s@%x,%x", basename, upper,
1378                          lower);
1379         else {
1380                 if (upper > 0) {
1381                         debug("address %08x:%08x exceeds addressable space\n",
1382                               upper, lower);
1383                         return -FDT_ERR_BADVALUE;
1384                 }
1385
1386                 snprintf(name, sizeof(name), "%s@%x", basename, lower);
1387         }
1388
1389         node = fdt_add_subnode(blob, parent, name);
1390         if (node < 0)
1391                 return node;
1392
1393         err = fdt_generate_phandle(blob, &phandle);
1394         if (err < 0)
1395                 return err;
1396
1397         err = fdtdec_set_phandle(blob, node, phandle);
1398         if (err < 0)
1399                 return err;
1400
1401         /* store one or two address cells */
1402         if (na > 1)
1403                 *ptr++ = cpu_to_fdt32(upper);
1404
1405         *ptr++ = cpu_to_fdt32(lower);
1406
1407         /* store one or two size cells */
1408         size = carveout->end - carveout->start + 1;
1409         upper = upper_32_bits(size);
1410         lower = lower_32_bits(size);
1411
1412         if (ns > 1)
1413                 *ptr++ = cpu_to_fdt32(upper);
1414
1415         *ptr++ = cpu_to_fdt32(lower);
1416
1417         err = fdt_setprop(blob, node, "reg", cells, (na + ns) * sizeof(*cells));
1418         if (err < 0)
1419                 return err;
1420
1421         /* return the phandle for the new node for the caller to use */
1422         if (phandlep)
1423                 *phandlep = phandle;
1424
1425         return 0;
1426 }
1427
1428 int fdtdec_get_carveout(const void *blob, const char *node, const char *name,
1429                         unsigned int index, struct fdt_memory *carveout)
1430 {
1431         const fdt32_t *prop;
1432         uint32_t phandle;
1433         int offset, len;
1434         fdt_size_t size;
1435
1436         offset = fdt_path_offset(blob, node);
1437         if (offset < 0)
1438                 return offset;
1439
1440         prop = fdt_getprop(blob, offset, name, &len);
1441         if (!prop) {
1442                 debug("failed to get %s for %s\n", name, node);
1443                 return -FDT_ERR_NOTFOUND;
1444         }
1445
1446         if ((len % sizeof(phandle)) != 0) {
1447                 debug("invalid phandle property\n");
1448                 return -FDT_ERR_BADPHANDLE;
1449         }
1450
1451         if (len < (sizeof(phandle) * (index + 1))) {
1452                 debug("invalid phandle index\n");
1453                 return -FDT_ERR_BADPHANDLE;
1454         }
1455
1456         phandle = fdt32_to_cpu(prop[index]);
1457
1458         offset = fdt_node_offset_by_phandle(blob, phandle);
1459         if (offset < 0) {
1460                 debug("failed to find node for phandle %u\n", phandle);
1461                 return offset;
1462         }
1463
1464         carveout->start = fdtdec_get_addr_size_auto_noparent(blob, offset,
1465                                                              "reg", 0, &size,
1466                                                              true);
1467         if (carveout->start == FDT_ADDR_T_NONE) {
1468                 debug("failed to read address/size from \"reg\" property\n");
1469                 return -FDT_ERR_NOTFOUND;
1470         }
1471
1472         carveout->end = carveout->start + size - 1;
1473
1474         return 0;
1475 }
1476
1477 int fdtdec_set_carveout(void *blob, const char *node, const char *prop_name,
1478                         unsigned int index, const char *name,
1479                         const struct fdt_memory *carveout)
1480 {
1481         uint32_t phandle;
1482         int err, offset;
1483         fdt32_t value;
1484
1485         /* XXX implement support for multiple phandles */
1486         if (index > 0) {
1487                 debug("invalid index %u\n", index);
1488                 return -FDT_ERR_BADOFFSET;
1489         }
1490
1491         err = fdtdec_add_reserved_memory(blob, name, carveout, &phandle);
1492         if (err < 0) {
1493                 debug("failed to add reserved memory: %d\n", err);
1494                 return err;
1495         }
1496
1497         offset = fdt_path_offset(blob, node);
1498         if (offset < 0) {
1499                 debug("failed to find offset for node %s: %d\n", node, offset);
1500                 return offset;
1501         }
1502
1503         value = cpu_to_fdt32(phandle);
1504
1505         err = fdt_setprop(blob, offset, prop_name, &value, sizeof(value));
1506         if (err < 0) {
1507                 debug("failed to set %s property for node %s: %d\n", prop_name,
1508                       node, err);
1509                 return err;
1510         }
1511
1512         return 0;
1513 }
1514
1515 int fdtdec_setup(void)
1516 {
1517 #if CONFIG_IS_ENABLED(OF_CONTROL)
1518 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
1519         void *fdt_blob;
1520 # endif
1521 # ifdef CONFIG_OF_EMBED
1522         /* Get a pointer to the FDT */
1523 #  ifdef CONFIG_SPL_BUILD
1524         gd->fdt_blob = __dtb_dt_spl_begin;
1525 #  else
1526         gd->fdt_blob = __dtb_dt_begin;
1527 #  endif
1528 # elif defined(CONFIG_OF_BOARD) || defined(CONFIG_OF_SEPARATE)
1529         /* Allow the board to override the fdt address. */
1530         gd->fdt_blob = board_fdt_blob_setup();
1531 # elif defined(CONFIG_OF_HOSTFILE)
1532         if (sandbox_read_fdt_from_file()) {
1533                 puts("Failed to read control FDT\n");
1534                 return -1;
1535         }
1536 # endif
1537 # ifndef CONFIG_SPL_BUILD
1538         /* Allow the early environment to override the fdt address */
1539 #  if CONFIG_IS_ENABLED(OF_PRIOR_STAGE)
1540         gd->fdt_blob = (void *)prior_stage_fdt_address;
1541 #  else
1542         gd->fdt_blob = map_sysmem
1543                 (env_get_ulong("fdtcontroladdr", 16,
1544                                (unsigned long)map_to_sysmem(gd->fdt_blob)), 0);
1545 #  endif
1546 # endif
1547
1548 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
1549         /*
1550          * Try and uncompress the blob.
1551          * Unfortunately there is no way to know how big the input blob really
1552          * is. So let us set the maximum input size arbitrarily high. 16MB
1553          * ought to be more than enough for packed DTBs.
1554          */
1555         if (uncompress_blob(gd->fdt_blob, 0x1000000, &fdt_blob) == 0)
1556                 gd->fdt_blob = fdt_blob;
1557
1558         /*
1559          * Check if blob is a FIT images containings DTBs.
1560          * If so, pick the most relevant
1561          */
1562         fdt_blob = locate_dtb_in_fit(gd->fdt_blob);
1563         if (fdt_blob) {
1564                 gd->multi_dtb_fit = gd->fdt_blob;
1565                 gd->fdt_blob = fdt_blob;
1566         }
1567
1568 # endif
1569 #endif
1570
1571         return fdtdec_prepare_fdt();
1572 }
1573
1574 #if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
1575 int fdtdec_resetup(int *rescan)
1576 {
1577         void *fdt_blob;
1578
1579         /*
1580          * If the current DTB is part of a compressed FIT image,
1581          * try to locate the best match from the uncompressed
1582          * FIT image stillpresent there. Save the time and space
1583          * required to uncompress it again.
1584          */
1585         if (gd->multi_dtb_fit) {
1586                 fdt_blob = locate_dtb_in_fit(gd->multi_dtb_fit);
1587
1588                 if (fdt_blob == gd->fdt_blob) {
1589                         /*
1590                          * The best match did not change. no need to tear down
1591                          * the DM and rescan the fdt.
1592                          */
1593                         *rescan = 0;
1594                         return 0;
1595                 }
1596
1597                 *rescan = 1;
1598                 gd->fdt_blob = fdt_blob;
1599                 return fdtdec_prepare_fdt();
1600         }
1601
1602         /*
1603          * If multi_dtb_fit is NULL, it means that blob appended to u-boot is
1604          * not a FIT image containings DTB, but a single DTB. There is no need
1605          * to teard down DM and rescan the DT in this case.
1606          */
1607         *rescan = 0;
1608         return 0;
1609 }
1610 #endif
1611
1612 #ifdef CONFIG_NR_DRAM_BANKS
1613 int fdtdec_decode_ram_size(const void *blob, const char *area, int board_id,
1614                            phys_addr_t *basep, phys_size_t *sizep, bd_t *bd)
1615 {
1616         int addr_cells, size_cells;
1617         const u32 *cell, *end;
1618         u64 total_size, size, addr;
1619         int node, child;
1620         bool auto_size;
1621         int bank;
1622         int len;
1623
1624         debug("%s: board_id=%d\n", __func__, board_id);
1625         if (!area)
1626                 area = "/memory";
1627         node = fdt_path_offset(blob, area);
1628         if (node < 0) {
1629                 debug("No %s node found\n", area);
1630                 return -ENOENT;
1631         }
1632
1633         cell = fdt_getprop(blob, node, "reg", &len);
1634         if (!cell) {
1635                 debug("No reg property found\n");
1636                 return -ENOENT;
1637         }
1638
1639         addr_cells = fdt_address_cells(blob, node);
1640         size_cells = fdt_size_cells(blob, node);
1641
1642         /* Check the board id and mask */
1643         for (child = fdt_first_subnode(blob, node);
1644              child >= 0;
1645              child = fdt_next_subnode(blob, child)) {
1646                 int match_mask, match_value;
1647
1648                 match_mask = fdtdec_get_int(blob, child, "match-mask", -1);
1649                 match_value = fdtdec_get_int(blob, child, "match-value", -1);
1650
1651                 if (match_value >= 0 &&
1652                     ((board_id & match_mask) == match_value)) {
1653                         /* Found matching mask */
1654                         debug("Found matching mask %d\n", match_mask);
1655                         node = child;
1656                         cell = fdt_getprop(blob, node, "reg", &len);
1657                         if (!cell) {
1658                                 debug("No memory-banks property found\n");
1659                                 return -EINVAL;
1660                         }
1661                         break;
1662                 }
1663         }
1664         /* Note: if no matching subnode was found we use the parent node */
1665
1666         if (bd) {
1667                 memset(bd->bi_dram, '\0', sizeof(bd->bi_dram[0]) *
1668                                                 CONFIG_NR_DRAM_BANKS);
1669         }
1670
1671         auto_size = fdtdec_get_bool(blob, node, "auto-size");
1672
1673         total_size = 0;
1674         end = cell + len / 4 - addr_cells - size_cells;
1675         debug("cell at %p, end %p\n", cell, end);
1676         for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
1677                 if (cell > end)
1678                         break;
1679                 addr = 0;
1680                 if (addr_cells == 2)
1681                         addr += (u64)fdt32_to_cpu(*cell++) << 32UL;
1682                 addr += fdt32_to_cpu(*cell++);
1683                 if (bd)
1684                         bd->bi_dram[bank].start = addr;
1685                 if (basep && !bank)
1686                         *basep = (phys_addr_t)addr;
1687
1688                 size = 0;
1689                 if (size_cells == 2)
1690                         size += (u64)fdt32_to_cpu(*cell++) << 32UL;
1691                 size += fdt32_to_cpu(*cell++);
1692
1693                 if (auto_size) {
1694                         u64 new_size;
1695
1696                         debug("Auto-sizing %llx, size %llx: ", addr, size);
1697                         new_size = get_ram_size((long *)(uintptr_t)addr, size);
1698                         if (new_size == size) {
1699                                 debug("OK\n");
1700                         } else {
1701                                 debug("sized to %llx\n", new_size);
1702                                 size = new_size;
1703                         }
1704                 }
1705
1706                 if (bd)
1707                         bd->bi_dram[bank].size = size;
1708                 total_size += size;
1709         }
1710
1711         debug("Memory size %llu\n", total_size);
1712         if (sizep)
1713                 *sizep = (phys_size_t)total_size;
1714
1715         return 0;
1716 }
1717 #endif /* CONFIG_NR_DRAM_BANKS */
1718
1719 #endif /* !USE_HOSTCC */