drivers/core/ofnode.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2017 Google, Inc
   4  * Written by Simon Glass <sjg@chromium.org>
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <fdtdec.h>
  10 #include <fdt_support.h>
  11 #include <log.h>
  12 #include <malloc.h>
  13 #include <linux/libfdt.h>
  14 #include <dm/of_access.h>
  15 #include <dm/of_addr.h>
  16 #include <dm/ofnode.h>
  17 #include <linux/err.h>
  18 #include <linux/ioport.h>
  19 #include <asm/global_data.h>
  20
  21 bool ofnode_name_eq(ofnode node, const char *name)
  22 {
  23         const char *node_name;
  24         size_t len;
  25
  26         assert(ofnode_valid(node));
  27
  28         node_name = ofnode_get_name(node);
  29         len = strchrnul(node_name, '@') - node_name;
  30
  31         return (strlen(name) == len) && !strncmp(node_name, name, len);
  32 }
  33
  34 int ofnode_read_u8(ofnode node, const char *propname, u8 *outp)
  35 {
  36         const u8 *cell;
  37         int len;
  38
  39         assert(ofnode_valid(node));
  40         debug("%s: %s: ", __func__, propname);
  41
  42         if (ofnode_is_np(node))
  43                 return of_read_u8(ofnode_to_np(node), propname, outp);
  44
  45         cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
  46                            &len);
  47         if (!cell || len < sizeof(*cell)) {
  48                 debug("(not found)\n");
  49                 return -EINVAL;
  50         }
  51         *outp = *cell;
  52         debug("%#x (%d)\n", *outp, *outp);
  53
  54         return 0;
  55 }
  56
  57 u8 ofnode_read_u8_default(ofnode node, const char *propname, u8 def)
  58 {
  59         assert(ofnode_valid(node));
  60         ofnode_read_u8(node, propname, &def);
  61
  62         return def;
  63 }
  64
  65 int ofnode_read_u16(ofnode node, const char *propname, u16 *outp)
  66 {
  67         const fdt16_t *cell;
  68         int len;
  69
  70         assert(ofnode_valid(node));
  71         debug("%s: %s: ", __func__, propname);
  72
  73         if (ofnode_is_np(node))
  74                 return of_read_u16(ofnode_to_np(node), propname, outp);
  75
  76         cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
  77                            &len);
  78         if (!cell || len < sizeof(*cell)) {
  79                 debug("(not found)\n");
  80                 return -EINVAL;
  81         }
  82         *outp = be16_to_cpup(cell);
  83         debug("%#x (%d)\n", *outp, *outp);
  84
  85         return 0;
  86 }
  87
  88 u16 ofnode_read_u16_default(ofnode node, const char *propname, u16 def)
  89 {
  90         assert(ofnode_valid(node));
  91         ofnode_read_u16(node, propname, &def);
  92
  93         return def;
  94 }
  95
  96 int ofnode_read_u32(ofnode node, const char *propname, u32 *outp)
  97 {
  98         return ofnode_read_u32_index(node, propname, 0, outp);
  99 }
 100
 101 u32 ofnode_read_u32_default(ofnode node, const char *propname, u32 def)
 102 {
 103         assert(ofnode_valid(node));
 104         ofnode_read_u32_index(node, propname, 0, &def);
 105
 106         return def;
 107 }
 108
 109 int ofnode_read_u32_index(ofnode node, const char *propname, int index,
 110                           u32 *outp)
 111 {
 112         const fdt32_t *cell;
 113         int len;
 114
 115         assert(ofnode_valid(node));
 116         debug("%s: %s: ", __func__, propname);
 117
 118         if (ofnode_is_np(node))
 119                 return of_read_u32_index(ofnode_to_np(node), propname, index,
 120                                          outp);
 121
 122         cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
 123                            &len);
 124         if (!cell) {
 125                 debug("(not found)\n");
 126                 return -EINVAL;
 127         }
 128
 129         if (len < (sizeof(int) * (index + 1))) {
 130                 debug("(not large enough)\n");
 131                 return -EOVERFLOW;
 132         }
 133
 134         *outp = fdt32_to_cpu(cell[index]);
 135         debug("%#x (%d)\n", *outp, *outp);
 136
 137         return 0;
 138 }
 139
 140 u32 ofnode_read_u32_index_default(ofnode node, const char *propname, int index,
 141                                   u32 def)
 142 {
 143         assert(ofnode_valid(node));
 144         ofnode_read_u32_index(node, propname, index, &def);
 145
 146         return def;
 147 }
 148
 149 int ofnode_read_s32_default(ofnode node, const char *propname, s32 def)
 150 {
 151         assert(ofnode_valid(node));
 152         ofnode_read_u32(node, propname, (u32 *)&def);
 153
 154         return def;
 155 }
 156
 157 int ofnode_read_u64(ofnode node, const char *propname, u64 *outp)
 158 {
 159         const unaligned_fdt64_t *cell;
 160         int len;
 161
 162         assert(ofnode_valid(node));
 163         debug("%s: %s: ", __func__, propname);
 164
 165         if (ofnode_is_np(node))
 166                 return of_read_u64(ofnode_to_np(node), propname, outp);
 167
 168         cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
 169                            &len);
 170         if (!cell || len < sizeof(*cell)) {
 171                 debug("(not found)\n");
 172                 return -EINVAL;
 173         }
 174         *outp = fdt64_to_cpu(cell[0]);
 175         debug("%#llx (%lld)\n", (unsigned long long)*outp,
 176               (unsigned long long)*outp);
 177
 178         return 0;
 179 }
 180
 181 u64 ofnode_read_u64_default(ofnode node, const char *propname, u64 def)
 182 {
 183         assert(ofnode_valid(node));
 184         ofnode_read_u64(node, propname, &def);
 185
 186         return def;
 187 }
 188
 189 bool ofnode_read_bool(ofnode node, const char *propname)
 190 {
 191         const void *prop;
 192
 193         assert(ofnode_valid(node));
 194         debug("%s: %s: ", __func__, propname);
 195
 196         prop = ofnode_get_property(node, propname, NULL);
 197
 198         debug("%s\n", prop ? "true" : "false");
 199
 200         return prop ? true : false;
 201 }
 202
 203 const void *ofnode_read_prop(ofnode node, const char *propname, int *sizep)
 204 {
 205         const char *val = NULL;
 206         int len;
 207
 208         assert(ofnode_valid(node));
 209         debug("%s: %s: ", __func__, propname);
 210
 211         if (ofnode_is_np(node)) {
 212                 struct property *prop = of_find_property(
 213                                 ofnode_to_np(node), propname, &len);
 214
 215                 if (prop) {
 216                         val = prop->value;
 217                         len = prop->length;
 218                 }
 219         } else {
 220                 val = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
 221                                   propname, &len);
 222         }
 223         if (!val) {
 224                 debug("<not found>\n");
 225                 if (sizep)
 226                         *sizep = -FDT_ERR_NOTFOUND;
 227                 return NULL;
 228         }
 229         if (sizep)
 230                 *sizep = len;
 231
 232         return val;
 233 }
 234
 235 const char *ofnode_read_string(ofnode node, const char *propname)
 236 {
 237         const char *str;
 238         int len;
 239
 240         str = ofnode_read_prop(node, propname, &len);
 241         if (!str)
 242                 return NULL;
 243
 244         if (strnlen(str, len) >= len) {
 245                 debug("<invalid>\n");
 246                 return NULL;
 247         }
 248         debug("%s\n", str);
 249
 250         return str;
 251 }
 252
 253 int ofnode_read_size(ofnode node, const char *propname)
 254 {
 255         int len;
 256
 257         if (!ofnode_read_prop(node, propname, &len))
 258                 return -EINVAL;
 259
 260         return len;
 261 }
 262
 263 ofnode ofnode_find_subnode(ofnode node, const char *subnode_name)
 264 {
 265         ofnode subnode;
 266
 267         assert(ofnode_valid(node));
 268         debug("%s: %s: ", __func__, subnode_name);
 269
 270         if (ofnode_is_np(node)) {
 271                 struct device_node *np = ofnode_to_np(node);
 272
 273                 for (np = np->child; np; np = np->sibling) {
 274                         if (!strcmp(subnode_name, np->name))
 275                                 break;
 276                 }
 277                 subnode = np_to_ofnode(np);
 278         } else {
 279                 int ooffset = fdt_subnode_offset(gd->fdt_blob,
 280                                 ofnode_to_offset(node), subnode_name);
 281                 subnode = offset_to_ofnode(ooffset);
 282         }
 283         debug("%s\n", ofnode_valid(subnode) ?
 284               ofnode_get_name(subnode) : "<none>");
 285
 286         return subnode;
 287 }
 288
 289 int ofnode_read_u32_array(ofnode node, const char *propname,
 290                           u32 *out_values, size_t sz)
 291 {
 292         assert(ofnode_valid(node));
 293         debug("%s: %s: ", __func__, propname);
 294
 295         if (ofnode_is_np(node)) {
 296                 return of_read_u32_array(ofnode_to_np(node), propname,
 297                                          out_values, sz);
 298         } else {
 299                 int ret;
 300
 301                 ret = fdtdec_get_int_array(gd->fdt_blob,
 302                                            ofnode_to_offset(node), propname,
 303                                            out_values, sz);
 304
 305                 /* get the error right, but space is more important in SPL */
 306                 if (!IS_ENABLED(CONFIG_SPL_BUILD)) {
 307                         if (ret == -FDT_ERR_NOTFOUND)
 308                                 return -EINVAL;
 309                         else if (ret == -FDT_ERR_BADLAYOUT)
 310                                 return -EOVERFLOW;
 311                 }
 312                 return ret;
 313         }
 314 }
 315
 316 #if !CONFIG_IS_ENABLED(DM_INLINE_OFNODE)
 317 bool ofnode_is_enabled(ofnode node)
 318 {
 319         if (ofnode_is_np(node)) {
 320                 return of_device_is_available(ofnode_to_np(node));
 321         } else {
 322                 return fdtdec_get_is_enabled(gd->fdt_blob,
 323                                              ofnode_to_offset(node));
 324         }
 325 }
 326
 327 ofnode ofnode_first_subnode(ofnode node)
 328 {
 329         assert(ofnode_valid(node));
 330         if (ofnode_is_np(node))
 331                 return np_to_ofnode(node.np->child);
 332
 333         return offset_to_ofnode(
 334                 fdt_first_subnode(gd->fdt_blob, ofnode_to_offset(node)));
 335 }
 336
 337 ofnode ofnode_next_subnode(ofnode node)
 338 {
 339         assert(ofnode_valid(node));
 340         if (ofnode_is_np(node))
 341                 return np_to_ofnode(node.np->sibling);
 342
 343         return offset_to_ofnode(
 344                 fdt_next_subnode(gd->fdt_blob, ofnode_to_offset(node)));
 345 }
 346 #endif /* !DM_INLINE_OFNODE */
 347
 348 ofnode ofnode_get_parent(ofnode node)
 349 {
 350         ofnode parent;
 351
 352         assert(ofnode_valid(node));
 353         if (ofnode_is_np(node))
 354                 parent = np_to_ofnode(of_get_parent(ofnode_to_np(node)));
 355         else
 356                 parent.of_offset = fdt_parent_offset(gd->fdt_blob,
 357                                                      ofnode_to_offset(node));
 358
 359         return parent;
 360 }
 361
 362 const char *ofnode_get_name(ofnode node)
 363 {
 364         if (!ofnode_valid(node)) {
 365                 debug("%s node not valid\n", __func__);
 366                 return NULL;
 367         }
 368
 369         if (ofnode_is_np(node))
 370                 return node.np->name;
 371
 372         return fdt_get_name(gd->fdt_blob, ofnode_to_offset(node), NULL);
 373 }
 374
 375 int ofnode_get_path(ofnode node, char *buf, int buflen)
 376 {
 377         assert(ofnode_valid(node));
 378
 379         if (ofnode_is_np(node)) {
 380                 if (strlen(node.np->full_name) >= buflen)
 381                         return -ENOSPC;
 382
 383                 strcpy(buf, node.np->full_name);
 384
 385                 return 0;
 386         } else {
 387                 int res;
 388
 389                 res = fdt_get_path(gd->fdt_blob, ofnode_to_offset(node), buf,
 390                                    buflen);
 391                 if (!res)
 392                         return res;
 393                 else if (res == -FDT_ERR_NOSPACE)
 394                         return -ENOSPC;
 395                 else
 396                         return -EINVAL;
 397         }
 398 }
 399
 400 ofnode ofnode_get_by_phandle(uint phandle)
 401 {
 402         ofnode node;
 403
 404         if (of_live_active())
 405                 node = np_to_ofnode(of_find_node_by_phandle(NULL, phandle));
 406         else
 407                 node.of_offset = fdt_node_offset_by_phandle(gd->fdt_blob,
 408                                                             phandle);
 409
 410         return node;
 411 }
 412
 413 static fdt_addr_t __ofnode_get_addr_size_index(ofnode node, int index,
 414                                                fdt_size_t *size, bool translate)
 415 {
 416         int na, ns;
 417
 418         if (size)
 419                 *size = FDT_SIZE_T_NONE;
 420
 421         if (ofnode_is_np(node)) {
 422                 const __be32 *prop_val;
 423                 u64 size64;
 424                 uint flags;
 425
 426                 prop_val = of_get_address(ofnode_to_np(node), index, &size64,
 427                                           &flags);
 428                 if (!prop_val)
 429                         return FDT_ADDR_T_NONE;
 430
 431                 if (size)
 432                         *size = size64;
 433
 434                 ns = of_n_size_cells(ofnode_to_np(node));
 435
 436                 if (translate && IS_ENABLED(CONFIG_OF_TRANSLATE) && ns > 0) {
 437                         return of_translate_address(ofnode_to_np(node), prop_val);
 438                 } else {
 439                         na = of_n_addr_cells(ofnode_to_np(node));
 440                         return of_read_number(prop_val, na);
 441                 }
 442         } else {
 443                 na = ofnode_read_simple_addr_cells(ofnode_get_parent(node));
 444                 ns = ofnode_read_simple_size_cells(ofnode_get_parent(node));
 445                 return fdtdec_get_addr_size_fixed(gd->fdt_blob,
 446                                                   ofnode_to_offset(node), "reg",
 447                                                   index, na, ns, size,
 448                                                   translate);
 449         }
 450 }
 451
 452 fdt_addr_t ofnode_get_addr_size_index(ofnode node, int index, fdt_size_t *size)
 453 {
 454         return __ofnode_get_addr_size_index(node, index, size, true);
 455 }
 456
 457 fdt_addr_t ofnode_get_addr_size_index_notrans(ofnode node, int index,
 458                                               fdt_size_t *size)
 459 {
 460         return __ofnode_get_addr_size_index(node, index, size, false);
 461 }
 462
 463 fdt_addr_t ofnode_get_addr_index(ofnode node, int index)
 464 {
 465         fdt_size_t size;
 466
 467         return ofnode_get_addr_size_index(node, index, &size);
 468 }
 469
 470 fdt_addr_t ofnode_get_addr(ofnode node)
 471 {
 472         return ofnode_get_addr_index(node, 0);
 473 }
 474
 475 fdt_size_t ofnode_get_size(ofnode node)
 476 {
 477         fdt_size_t size;
 478
 479         ofnode_get_addr_size_index(node, 0, &size);
 480
 481         return size;
 482 }
 483
 484 int ofnode_stringlist_search(ofnode node, const char *property,
 485                              const char *string)
 486 {
 487         if (ofnode_is_np(node)) {
 488                 return of_property_match_string(ofnode_to_np(node),
 489                                                 property, string);
 490         } else {
 491                 int ret;
 492
 493                 ret = fdt_stringlist_search(gd->fdt_blob,
 494                                             ofnode_to_offset(node), property,
 495                                             string);
 496                 if (ret == -FDT_ERR_NOTFOUND)
 497                         return -ENODATA;
 498                 else if (ret < 0)
 499                         return -EINVAL;
 500
 501                 return ret;
 502         }
 503 }
 504
 505 int ofnode_read_string_index(ofnode node, const char *property, int index,
 506                              const char **outp)
 507 {
 508         if (ofnode_is_np(node)) {
 509                 return of_property_read_string_index(ofnode_to_np(node),
 510                                                      property, index, outp);
 511         } else {
 512                 int len;
 513
 514                 *outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node),
 515                                            property, index, &len);
 516                 if (len < 0)
 517                         return -EINVAL;
 518                 return 0;
 519         }
 520 }
 521
 522 int ofnode_read_string_count(ofnode node, const char *property)
 523 {
 524         if (ofnode_is_np(node)) {
 525                 return of_property_count_strings(ofnode_to_np(node), property);
 526         } else {
 527                 return fdt_stringlist_count(gd->fdt_blob,
 528                                             ofnode_to_offset(node), property);
 529         }
 530 }
 531
 532 int ofnode_read_string_list(ofnode node, const char *property,
 533                             const char ***listp)
 534 {
 535         const char **prop;
 536         int count;
 537         int i;
 538
 539         *listp = NULL;
 540         count = ofnode_read_string_count(node, property);
 541         if (count < 0)
 542                 return count;
 543         if (!count)
 544                 return 0;
 545
 546         prop = calloc(count + 1, sizeof(char *));
 547         if (!prop)
 548                 return -ENOMEM;
 549
 550         for (i = 0; i < count; i++)
 551                 ofnode_read_string_index(node, property, i, &prop[i]);
 552         prop[count] = NULL;
 553         *listp = prop;
 554
 555         return count;
 556 }
 557
 558 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in,
 559                                             struct ofnode_phandle_args *out)
 560 {
 561         assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
 562         out->node = offset_to_ofnode(in->node);
 563         out->args_count = in->args_count;
 564         memcpy(out->args, in->args, sizeof(out->args));
 565 }
 566
 567 static void ofnode_from_of_phandle_args(struct of_phandle_args *in,
 568                                         struct ofnode_phandle_args *out)
 569 {
 570         assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
 571         out->node = np_to_ofnode(in->np);
 572         out->args_count = in->args_count;
 573         memcpy(out->args, in->args, sizeof(out->args));
 574 }
 575
 576 int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
 577                                    const char *cells_name, int cell_count,
 578                                    int index,
 579                                    struct ofnode_phandle_args *out_args)
 580 {
 581         if (ofnode_is_np(node)) {
 582                 struct of_phandle_args args;
 583                 int ret;
 584
 585                 ret = of_parse_phandle_with_args(ofnode_to_np(node),
 586                                                  list_name, cells_name,
 587                                                  cell_count, index,
 588                                                  &args);
 589                 if (ret)
 590                         return ret;
 591                 ofnode_from_of_phandle_args(&args, out_args);
 592         } else {
 593                 struct fdtdec_phandle_args args;
 594                 int ret;
 595
 596                 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob,
 597                                                      ofnode_to_offset(node),
 598                                                      list_name, cells_name,
 599                                                      cell_count, index, &args);
 600                 if (ret)
 601                         return ret;
 602                 ofnode_from_fdtdec_phandle_args(&args, out_args);
 603         }
 604
 605         return 0;
 606 }
 607
 608 int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
 609                                    const char *cells_name, int cell_count)
 610 {
 611         if (ofnode_is_np(node))
 612                 return of_count_phandle_with_args(ofnode_to_np(node),
 613                                 list_name, cells_name, cell_count);
 614         else
 615                 return fdtdec_parse_phandle_with_args(gd->fdt_blob,
 616                                 ofnode_to_offset(node), list_name, cells_name,
 617                                 cell_count, -1, NULL);
 618 }
 619
 620 ofnode ofnode_path(const char *path)
 621 {
 622         if (of_live_active())
 623                 return np_to_ofnode(of_find_node_by_path(path));
 624         else
 625                 return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path));
 626 }
 627
 628 ofnode ofnode_path_root(oftree tree, const char *path)
 629 {
 630         if (of_live_active())
 631                 return np_to_ofnode(of_find_node_opts_by_path(tree.np, path,
 632                                                               NULL));
 633         else if (*path != '/' && tree.fdt != gd->fdt_blob)
 634                 return ofnode_null();  /* Aliases only on control FDT */
 635         else
 636                 return offset_to_ofnode(fdt_path_offset(tree.fdt, path));
 637 }
 638
 639 const void *ofnode_read_chosen_prop(const char *propname, int *sizep)
 640 {
 641         ofnode chosen_node;
 642
 643         chosen_node = ofnode_path("/chosen");
 644
 645         return ofnode_read_prop(chosen_node, propname, sizep);
 646 }
 647
 648 const char *ofnode_read_chosen_string(const char *propname)
 649 {
 650         return ofnode_read_chosen_prop(propname, NULL);
 651 }
 652
 653 ofnode ofnode_get_chosen_node(const char *name)
 654 {
 655         const char *prop;
 656
 657         prop = ofnode_read_chosen_prop(name, NULL);
 658         if (!prop)
 659                 return ofnode_null();
 660
 661         return ofnode_path(prop);
 662 }
 663
 664 const void *ofnode_read_aliases_prop(const char *propname, int *sizep)
 665 {
 666         ofnode node;
 667
 668         node = ofnode_path("/aliases");
 669
 670         return ofnode_read_prop(node, propname, sizep);
 671 }
 672
 673 ofnode ofnode_get_aliases_node(const char *name)
 674 {
 675         const char *prop;
 676
 677         prop = ofnode_read_aliases_prop(name, NULL);
 678         if (!prop)
 679                 return ofnode_null();
 680
 681         debug("%s: node_path: %s\n", __func__, prop);
 682
 683         return ofnode_path(prop);
 684 }
 685
 686 int ofnode_get_child_count(ofnode parent)
 687 {
 688         ofnode child;
 689         int num = 0;
 690
 691         ofnode_for_each_subnode(child, parent)
 692                 num++;
 693
 694         return num;
 695 }
 696
 697 static int decode_timing_property(ofnode node, const char *name,
 698                                   struct timing_entry *result)
 699 {
 700         int length, ret = 0;
 701
 702         length = ofnode_read_size(node, name);
 703         if (length < 0) {
 704                 debug("%s: could not find property %s\n",
 705                       ofnode_get_name(node), name);
 706                 return length;
 707         }
 708
 709         if (length == sizeof(u32)) {
 710                 result->typ = ofnode_read_u32_default(node, name, 0);
 711                 result->min = result->typ;
 712                 result->max = result->typ;
 713         } else {
 714                 ret = ofnode_read_u32_array(node, name, &result->min, 3);
 715         }
 716
 717         return ret;
 718 }
 719
 720 int ofnode_decode_display_timing(ofnode parent, int index,
 721                                  struct display_timing *dt)
 722 {
 723         int i;
 724         ofnode timings, node;
 725         u32 val = 0;
 726         int ret = 0;
 727
 728         timings = ofnode_find_subnode(parent, "display-timings");
 729         if (!ofnode_valid(timings))
 730                 return -EINVAL;
 731
 732         i = 0;
 733         ofnode_for_each_subnode(node, timings) {
 734                 if (i++ == index)
 735                         break;
 736         }
 737
 738         if (!ofnode_valid(node))
 739                 return -EINVAL;
 740
 741         memset(dt, 0, sizeof(*dt));
 742
 743         ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch);
 744         ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch);
 745         ret |= decode_timing_property(node, "hactive", &dt->hactive);
 746         ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len);
 747         ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch);
 748         ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch);
 749         ret |= decode_timing_property(node, "vactive", &dt->vactive);
 750         ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len);
 751         ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock);
 752
 753         dt->flags = 0;
 754         val = ofnode_read_u32_default(node, "vsync-active", -1);
 755         if (val != -1) {
 756                 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
 757                                 DISPLAY_FLAGS_VSYNC_LOW;
 758         }
 759         val = ofnode_read_u32_default(node, "hsync-active", -1);
 760         if (val != -1) {
 761                 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
 762                                 DISPLAY_FLAGS_HSYNC_LOW;
 763         }
 764         val = ofnode_read_u32_default(node, "de-active", -1);
 765         if (val != -1) {
 766                 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
 767                                 DISPLAY_FLAGS_DE_LOW;
 768         }
 769         val = ofnode_read_u32_default(node, "pixelclk-active", -1);
 770         if (val != -1) {
 771                 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
 772                                 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
 773         }
 774
 775         if (ofnode_read_bool(node, "interlaced"))
 776                 dt->flags |= DISPLAY_FLAGS_INTERLACED;
 777         if (ofnode_read_bool(node, "doublescan"))
 778                 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
 779         if (ofnode_read_bool(node, "doubleclk"))
 780                 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
 781
 782         return ret;
 783 }
 784
 785 const void *ofnode_get_property(ofnode node, const char *propname, int *lenp)
 786 {
 787         if (ofnode_is_np(node))
 788                 return of_get_property(ofnode_to_np(node), propname, lenp);
 789         else
 790                 return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
 791                                    propname, lenp);
 792 }
 793
 794 int ofnode_first_property(ofnode node, struct ofprop *prop)
 795 {
 796         prop->node = node;
 797
 798         if (ofnode_is_np(node)) {
 799                 prop->prop = of_get_first_property(ofnode_to_np(prop->node));
 800                 if (!prop->prop)
 801                         return -FDT_ERR_NOTFOUND;
 802         } else {
 803                 prop->offset =
 804                         fdt_first_property_offset(gd->fdt_blob,
 805                                                   ofnode_to_offset(prop->node));
 806                 if (prop->offset < 0)
 807                         return prop->offset;
 808         }
 809
 810         return 0;
 811 }
 812
 813 int ofnode_next_property(struct ofprop *prop)
 814 {
 815         if (ofnode_is_np(prop->node)) {
 816                 prop->prop = of_get_next_property(ofnode_to_np(prop->node),
 817                                                   prop->prop);
 818                 if (!prop->prop)
 819                         return -FDT_ERR_NOTFOUND;
 820         } else {
 821                 prop->offset = fdt_next_property_offset(gd->fdt_blob,
 822                                                         prop->offset);
 823                 if (prop->offset  < 0)
 824                         return prop->offset;
 825         }
 826
 827         return 0;
 828 }
 829
 830 const void *ofprop_get_property(const struct ofprop *prop,
 831                                 const char **propname, int *lenp)
 832 {
 833         if (ofnode_is_np(prop->node))
 834                 return of_get_property_by_prop(ofnode_to_np(prop->node),
 835                                                prop->prop, propname, lenp);
 836         else
 837                 return fdt_getprop_by_offset(gd->fdt_blob,
 838                                              prop->offset,
 839                                              propname, lenp);
 840 }
 841
 842 fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property,
 843                                 fdt_size_t *sizep)
 844 {
 845         if (ofnode_is_np(node)) {
 846                 int na, ns;
 847                 int psize;
 848                 const struct device_node *np = ofnode_to_np(node);
 849                 const __be32 *prop = of_get_property(np, property, &psize);
 850
 851                 if (!prop)
 852                         return FDT_ADDR_T_NONE;
 853                 na = of_n_addr_cells(np);
 854                 ns = of_n_size_cells(np);
 855                 *sizep = of_read_number(prop + na, ns);
 856
 857                 if (CONFIG_IS_ENABLED(OF_TRANSLATE) && ns > 0)
 858                         return of_translate_address(np, prop);
 859                 else
 860                         return of_read_number(prop, na);
 861         } else {
 862                 return fdtdec_get_addr_size(gd->fdt_blob,
 863                                             ofnode_to_offset(node), property,
 864                                             sizep);
 865         }
 866 }
 867
 868 const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
 869                                         size_t sz)
 870 {
 871         if (ofnode_is_np(node)) {
 872                 const struct device_node *np = ofnode_to_np(node);
 873                 int psize;
 874                 const __be32 *prop = of_get_property(np, propname, &psize);
 875
 876                 if (!prop || sz != psize)
 877                         return NULL;
 878                 return (uint8_t *)prop;
 879
 880         } else {
 881                 return fdtdec_locate_byte_array(gd->fdt_blob,
 882                                 ofnode_to_offset(node), propname, sz);
 883         }
 884 }
 885
 886 int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
 887                          const char *propname, struct fdt_pci_addr *addr)
 888 {
 889         const fdt32_t *cell;
 890         int len;
 891         int ret = -ENOENT;
 892
 893         debug("%s: %s: ", __func__, propname);
 894
 895         /*
 896          * If we follow the pci bus bindings strictly, we should check
 897          * the value of the node's parent node's #address-cells and
 898          * #size-cells. They need to be 3 and 2 accordingly. However,
 899          * for simplicity we skip the check here.
 900          */
 901         cell = ofnode_get_property(node, propname, &len);
 902         if (!cell)
 903                 goto fail;
 904
 905         if ((len % FDT_PCI_REG_SIZE) == 0) {
 906                 int num = len / FDT_PCI_REG_SIZE;
 907                 int i;
 908
 909                 for (i = 0; i < num; i++) {
 910                         debug("pci address #%d: %08lx %08lx %08lx\n", i,
 911                               (ulong)fdt32_to_cpu(cell[0]),
 912                               (ulong)fdt32_to_cpu(cell[1]),
 913                               (ulong)fdt32_to_cpu(cell[2]));
 914                         if ((fdt32_to_cpu(*cell) & type) == type) {
 915                                 addr->phys_hi = fdt32_to_cpu(cell[0]);
 916                                 addr->phys_mid = fdt32_to_cpu(cell[1]);
 917                                 addr->phys_lo = fdt32_to_cpu(cell[2]);
 918                                 break;
 919                         }
 920
 921                         cell += (FDT_PCI_ADDR_CELLS +
 922                                  FDT_PCI_SIZE_CELLS);
 923                 }
 924
 925                 if (i == num) {
 926                         ret = -ENXIO;
 927                         goto fail;
 928                 }
 929
 930                 return 0;
 931         }
 932
 933         ret = -EINVAL;
 934
 935 fail:
 936         debug("(not found)\n");
 937         return ret;
 938 }
 939
 940 int ofnode_read_pci_vendev(ofnode node, u16 *vendor, u16 *device)
 941 {
 942         const char *list, *end;
 943         int len;
 944
 945         list = ofnode_get_property(node, "compatible", &len);
 946         if (!list)
 947                 return -ENOENT;
 948
 949         end = list + len;
 950         while (list < end) {
 951                 len = strlen(list);
 952                 if (len >= strlen("pciVVVV,DDDD")) {
 953                         char *s = strstr(list, "pci");
 954
 955                         /*
 956                          * check if the string is something like pciVVVV,DDDD.RR
 957                          * or just pciVVVV,DDDD
 958                          */
 959                         if (s && s[7] == ',' &&
 960                             (s[12] == '.' || s[12] == 0)) {
 961                                 s += 3;
 962                                 *vendor = simple_strtol(s, NULL, 16);
 963
 964                                 s += 5;
 965                                 *device = simple_strtol(s, NULL, 16);
 966
 967                                 return 0;
 968                         }
 969                 }
 970                 list += (len + 1);
 971         }
 972
 973         return -ENOENT;
 974 }
 975
 976 int ofnode_read_eth_phy_id(ofnode node, u16 *vendor, u16 *device)
 977 {
 978         const char *list, *end;
 979         int len;
 980
 981         list = ofnode_get_property(node, "compatible", &len);
 982
 983         if (!list)
 984                 return -ENOENT;
 985
 986         end = list + len;
 987         while (list < end) {
 988                 len = strlen(list);
 989
 990                 if (len >= strlen("ethernet-phy-idVVVV,DDDD")) {
 991                         char *s = strstr(list, "ethernet-phy-id");
 992
 993                         /*
 994                          * check if the string is something like
 995                          * ethernet-phy-idVVVV,DDDD
 996                          */
 997                         if (s && s[19] == '.') {
 998                                 s += strlen("ethernet-phy-id");
 999                                 *vendor = simple_strtol(s, NULL, 16);
1000                                 s += 5;
1001                                 *device = simple_strtol(s, NULL, 16);
1002
1003                                 return 0;
1004                         }
1005                 }
1006                 list += (len + 1);
1007         }
1008
1009         return -ENOENT;
1010 }
1011
1012 int ofnode_read_addr_cells(ofnode node)
1013 {
1014         if (ofnode_is_np(node)) {
1015                 return of_n_addr_cells(ofnode_to_np(node));
1016         } else {
1017                 int parent = fdt_parent_offset(gd->fdt_blob,
1018                                                ofnode_to_offset(node));
1019
1020                 return fdt_address_cells(gd->fdt_blob, parent);
1021         }
1022 }
1023
1024 int ofnode_read_size_cells(ofnode node)
1025 {
1026         if (ofnode_is_np(node)) {
1027                 return of_n_size_cells(ofnode_to_np(node));
1028         } else {
1029                 int parent = fdt_parent_offset(gd->fdt_blob,
1030                                                ofnode_to_offset(node));
1031
1032                 return fdt_size_cells(gd->fdt_blob, parent);
1033         }
1034 }
1035
1036 int ofnode_read_simple_addr_cells(ofnode node)
1037 {
1038         if (ofnode_is_np(node))
1039                 return of_simple_addr_cells(ofnode_to_np(node));
1040         else
1041                 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
1042 }
1043
1044 int ofnode_read_simple_size_cells(ofnode node)
1045 {
1046         if (ofnode_is_np(node))
1047                 return of_simple_size_cells(ofnode_to_np(node));
1048         else
1049                 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
1050 }
1051
1052 bool ofnode_pre_reloc(ofnode node)
1053 {
1054 #if defined(CONFIG_SPL_BUILD) || defined(CONFIG_TPL_BUILD)
1055         /* for SPL and TPL the remaining nodes after the fdtgrep 1st pass
1056          * had property dm-pre-reloc or u-boot,dm-spl/tpl.
1057          * They are removed in final dtb (fdtgrep 2nd pass)
1058          */
1059         return true;
1060 #else
1061         if (ofnode_read_bool(node, "u-boot,dm-pre-reloc"))
1062                 return true;
1063         if (ofnode_read_bool(node, "u-boot,dm-pre-proper"))
1064                 return true;
1065
1066         /*
1067          * In regular builds individual spl and tpl handling both
1068          * count as handled pre-relocation for later second init.
1069          */
1070         if (ofnode_read_bool(node, "u-boot,dm-spl") ||
1071             ofnode_read_bool(node, "u-boot,dm-tpl"))
1072                 return true;
1073
1074         return false;
1075 #endif
1076 }
1077
1078 int ofnode_read_resource(ofnode node, uint index, struct resource *res)
1079 {
1080         if (ofnode_is_np(node)) {
1081                 return of_address_to_resource(ofnode_to_np(node), index, res);
1082         } else {
1083                 struct fdt_resource fres;
1084                 int ret;
1085
1086                 ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node),
1087                                        "reg", index, &fres);
1088                 if (ret < 0)
1089                         return -EINVAL;
1090                 memset(res, '\0', sizeof(*res));
1091                 res->start = fres.start;
1092                 res->end = fres.end;
1093
1094                 return 0;
1095         }
1096 }
1097
1098 int ofnode_read_resource_byname(ofnode node, const char *name,
1099                                 struct resource *res)
1100 {
1101         int index;
1102
1103         index = ofnode_stringlist_search(node, "reg-names", name);
1104         if (index < 0)
1105                 return index;
1106
1107         return ofnode_read_resource(node, index, res);
1108 }
1109
1110 u64 ofnode_translate_address(ofnode node, const fdt32_t *in_addr)
1111 {
1112         if (ofnode_is_np(node))
1113                 return of_translate_address(ofnode_to_np(node), in_addr);
1114         else
1115                 return fdt_translate_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
1116 }
1117
1118 u64 ofnode_translate_dma_address(ofnode node, const fdt32_t *in_addr)
1119 {
1120         if (ofnode_is_np(node))
1121                 return of_translate_dma_address(ofnode_to_np(node), in_addr);
1122         else
1123                 return fdt_translate_dma_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
1124 }
1125
1126 int ofnode_get_dma_range(ofnode node, phys_addr_t *cpu, dma_addr_t *bus, u64 *size)
1127 {
1128         if (ofnode_is_np(node))
1129                 return of_get_dma_range(ofnode_to_np(node), cpu, bus, size);
1130         else
1131                 return fdt_get_dma_range(gd->fdt_blob, ofnode_to_offset(node),
1132                                          cpu, bus, size);
1133 }
1134
1135 int ofnode_device_is_compatible(ofnode node, const char *compat)
1136 {
1137         if (ofnode_is_np(node))
1138                 return of_device_is_compatible(ofnode_to_np(node), compat,
1139                                                NULL, NULL);
1140         else
1141                 return !fdt_node_check_compatible(gd->fdt_blob,
1142                                                   ofnode_to_offset(node),
1143                                                   compat);
1144 }
1145
1146 ofnode ofnode_by_compatible(ofnode from, const char *compat)
1147 {
1148         if (of_live_active()) {
1149                 return np_to_ofnode(of_find_compatible_node(
1150                         (struct device_node *)ofnode_to_np(from), NULL,
1151                         compat));
1152         } else {
1153                 return offset_to_ofnode(fdt_node_offset_by_compatible(
1154                                 gd->fdt_blob, ofnode_to_offset(from), compat));
1155         }
1156 }
1157
1158 ofnode ofnode_by_prop_value(ofnode from, const char *propname,
1159                             const void *propval, int proplen)
1160 {
1161         if (of_live_active()) {
1162                 return np_to_ofnode(of_find_node_by_prop_value(
1163                         (struct device_node *)ofnode_to_np(from), propname,
1164                         propval, proplen));
1165         } else {
1166                 return offset_to_ofnode(fdt_node_offset_by_prop_value(
1167                                 gd->fdt_blob, ofnode_to_offset(from),
1168                                 propname, propval, proplen));
1169         }
1170 }
1171
1172 int ofnode_write_prop(ofnode node, const char *propname, const void *value,
1173                       int len)
1174 {
1175         if (of_live_active())
1176                 return of_write_prop(ofnode_to_np(node), propname, len, value);
1177         else
1178                 return fdt_setprop((void *)gd->fdt_blob, ofnode_to_offset(node),
1179                                    propname, value, len);
1180
1181         return 0;
1182 }
1183
1184 int ofnode_write_string(ofnode node, const char *propname, const char *value)
1185 {
1186         assert(ofnode_valid(node));
1187
1188         debug("%s: %s = %s", __func__, propname, value);
1189
1190         return ofnode_write_prop(node, propname, value, strlen(value) + 1);
1191 }
1192
1193 int ofnode_write_u32(ofnode node, const char *propname, u32 value)
1194 {
1195         fdt32_t *val;
1196
1197         assert(ofnode_valid(node));
1198
1199         log_debug("%s = %x", propname, value);
1200         val = malloc(sizeof(*val));
1201         if (!val)
1202                 return -ENOMEM;
1203         *val = cpu_to_fdt32(value);
1204
1205         return ofnode_write_prop(node, propname, val, sizeof(value));
1206 }
1207
1208 int ofnode_set_enabled(ofnode node, bool value)
1209 {
1210         assert(ofnode_valid(node));
1211
1212         if (value)
1213                 return ofnode_write_string(node, "status", "okay");
1214         else
1215                 return ofnode_write_string(node, "status", "disabled");
1216 }
1217
1218 bool ofnode_conf_read_bool(const char *prop_name)
1219 {
1220         ofnode node;
1221
1222         node = ofnode_path("/config");
1223         if (!ofnode_valid(node))
1224                 return false;
1225
1226         return ofnode_read_bool(node, prop_name);
1227 }
1228
1229 int ofnode_conf_read_int(const char *prop_name, int default_val)
1230 {
1231         ofnode node;
1232
1233         node = ofnode_path("/config");
1234         if (!ofnode_valid(node))
1235                 return default_val;
1236
1237         return ofnode_read_u32_default(node, prop_name, default_val);
1238 }
1239
1240 const char *ofnode_conf_read_str(const char *prop_name)
1241 {
1242         ofnode node;
1243
1244         node = ofnode_path("/config");
1245         if (!ofnode_valid(node))
1246                 return NULL;
1247
1248         return ofnode_read_string(node, prop_name);
1249 }
1250
1251 ofnode ofnode_get_phy_node(ofnode node)
1252 {
1253         /* DT node properties that reference a PHY node */
1254         static const char * const phy_handle_str[] = {
1255                 "phy-handle", "phy", "phy-device",
1256         };
1257         struct ofnode_phandle_args args = {
1258                 .node = ofnode_null()
1259         };
1260         int i;
1261
1262         assert(ofnode_valid(node));
1263
1264         for (i = 0; i < ARRAY_SIZE(phy_handle_str); i++)
1265                 if (!ofnode_parse_phandle_with_args(node, phy_handle_str[i],
1266                                                     NULL, 0, 0, &args))
1267                         break;
1268
1269         return args.node;
1270 }
1271
1272 phy_interface_t ofnode_read_phy_mode(ofnode node)
1273 {
1274         const char *mode;
1275         int i;
1276
1277         assert(ofnode_valid(node));
1278
1279         mode = ofnode_read_string(node, "phy-mode");
1280         if (!mode)
1281                 mode = ofnode_read_string(node, "phy-connection-type");
1282
1283         if (!mode)
1284                 return PHY_INTERFACE_MODE_NA;
1285
1286         for (i = 0; i < PHY_INTERFACE_MODE_MAX; i++)
1287                 if (!strcmp(mode, phy_interface_strings[i]))
1288                         return i;
1289
1290         debug("%s: Invalid PHY interface '%s'\n", __func__, mode);
1291
1292         return PHY_INTERFACE_MODE_NA;
1293 }
1294
1295 int ofnode_add_subnode(ofnode node, const char *name, ofnode *subnodep)
1296 {
1297         ofnode subnode;
1298         int ret = 0;
1299
1300         assert(ofnode_valid(node));
1301
1302         if (ofnode_is_np(node)) {
1303                 struct device_node *np, *child;
1304
1305                 np = (struct device_node *)ofnode_to_np(node);
1306                 ret = of_add_subnode(np, name, -1, &child);
1307                 if (ret && ret != -EEXIST)
1308                         return ret;
1309                 subnode = np_to_ofnode(child);
1310         } else {
1311                 void *fdt = (void *)gd->fdt_blob;
1312                 int poffset = ofnode_to_offset(node);
1313                 int offset;
1314
1315                 offset = fdt_add_subnode(fdt, poffset, name);
1316                 if (offset == -FDT_ERR_EXISTS) {
1317                         offset = fdt_subnode_offset(fdt, poffset, name);
1318                         ret = -EEXIST;
1319                 }
1320                 if (offset < 0)
1321                         return -EINVAL;
1322                 subnode = offset_to_ofnode(offset);
1323         }
1324
1325         *subnodep = subnode;
1326
1327         return ret;     /* 0 or -EEXIST */
1328 }