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_u32(ofnode node, const char *propname, u32 *outp)
  35 {
  36         return ofnode_read_u32_index(node, propname, 0, outp);
  37 }
  38
  39 u32 ofnode_read_u32_default(ofnode node, const char *propname, u32 def)
  40 {
  41         assert(ofnode_valid(node));
  42         ofnode_read_u32_index(node, propname, 0, &def);
  43
  44         return def;
  45 }
  46
  47 int ofnode_read_u32_index(ofnode node, const char *propname, int index,
  48                           u32 *outp)
  49 {
  50         const fdt32_t *cell;
  51         int len;
  52
  53         assert(ofnode_valid(node));
  54         debug("%s: %s: ", __func__, propname);
  55
  56         if (ofnode_is_np(node))
  57                 return of_read_u32_index(ofnode_to_np(node), propname, index,
  58                                          outp);
  59
  60         cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
  61                            &len);
  62         if (!cell) {
  63                 debug("(not found)\n");
  64                 return -EINVAL;
  65         }
  66
  67         if (len < (sizeof(int) * (index + 1))) {
  68                 debug("(not large enough)\n");
  69                 return -EOVERFLOW;
  70         }
  71
  72         *outp = fdt32_to_cpu(cell[index]);
  73         debug("%#x (%d)\n", *outp, *outp);
  74
  75         return 0;
  76 }
  77
  78 u32 ofnode_read_u32_index_default(ofnode node, const char *propname, int index,
  79                                   u32 def)
  80 {
  81         assert(ofnode_valid(node));
  82         ofnode_read_u32_index(node, propname, index, &def);
  83
  84         return def;
  85 }
  86
  87 int ofnode_read_s32_default(ofnode node, const char *propname, s32 def)
  88 {
  89         assert(ofnode_valid(node));
  90         ofnode_read_u32(node, propname, (u32 *)&def);
  91
  92         return def;
  93 }
  94
  95 int ofnode_read_u64(ofnode node, const char *propname, u64 *outp)
  96 {
  97         const unaligned_fdt64_t *cell;
  98         int len;
  99
 100         assert(ofnode_valid(node));
 101         debug("%s: %s: ", __func__, propname);
 102
 103         if (ofnode_is_np(node))
 104                 return of_read_u64(ofnode_to_np(node), propname, outp);
 105
 106         cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
 107                            &len);
 108         if (!cell || len < sizeof(*cell)) {
 109                 debug("(not found)\n");
 110                 return -EINVAL;
 111         }
 112         *outp = fdt64_to_cpu(cell[0]);
 113         debug("%#llx (%lld)\n", (unsigned long long)*outp,
 114               (unsigned long long)*outp);
 115
 116         return 0;
 117 }
 118
 119 u64 ofnode_read_u64_default(ofnode node, const char *propname, u64 def)
 120 {
 121         assert(ofnode_valid(node));
 122         ofnode_read_u64(node, propname, &def);
 123
 124         return def;
 125 }
 126
 127 bool ofnode_read_bool(ofnode node, const char *propname)
 128 {
 129         const void *prop;
 130
 131         assert(ofnode_valid(node));
 132         debug("%s: %s: ", __func__, propname);
 133
 134         prop = ofnode_get_property(node, propname, NULL);
 135
 136         debug("%s\n", prop ? "true" : "false");
 137
 138         return prop ? true : false;
 139 }
 140
 141 const void *ofnode_read_prop(ofnode node, const char *propname, int *sizep)
 142 {
 143         const char *val = NULL;
 144         int len;
 145
 146         assert(ofnode_valid(node));
 147         debug("%s: %s: ", __func__, propname);
 148
 149         if (ofnode_is_np(node)) {
 150                 struct property *prop = of_find_property(
 151                                 ofnode_to_np(node), propname, &len);
 152
 153                 if (prop) {
 154                         val = prop->value;
 155                         len = prop->length;
 156                 }
 157         } else {
 158                 val = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
 159                                   propname, &len);
 160         }
 161         if (!val) {
 162                 debug("<not found>\n");
 163                 if (sizep)
 164                         *sizep = -FDT_ERR_NOTFOUND;
 165                 return NULL;
 166         }
 167         if (sizep)
 168                 *sizep = len;
 169
 170         return val;
 171 }
 172
 173 const char *ofnode_read_string(ofnode node, const char *propname)
 174 {
 175         const char *str;
 176         int len;
 177
 178         str = ofnode_read_prop(node, propname, &len);
 179         if (!str)
 180                 return NULL;
 181
 182         if (strnlen(str, len) >= len) {
 183                 debug("<invalid>\n");
 184                 return NULL;
 185         }
 186         debug("%s\n", str);
 187
 188         return str;
 189 }
 190
 191 int ofnode_read_size(ofnode node, const char *propname)
 192 {
 193         int len;
 194
 195         if (!ofnode_read_prop(node, propname, &len))
 196                 return -EINVAL;
 197
 198         return len;
 199 }
 200
 201 ofnode ofnode_find_subnode(ofnode node, const char *subnode_name)
 202 {
 203         ofnode subnode;
 204
 205         assert(ofnode_valid(node));
 206         debug("%s: %s: ", __func__, subnode_name);
 207
 208         if (ofnode_is_np(node)) {
 209                 const struct device_node *np = ofnode_to_np(node);
 210
 211                 for (np = np->child; np; np = np->sibling) {
 212                         if (!strcmp(subnode_name, np->name))
 213                                 break;
 214                 }
 215                 subnode = np_to_ofnode(np);
 216         } else {
 217                 int ooffset = fdt_subnode_offset(gd->fdt_blob,
 218                                 ofnode_to_offset(node), subnode_name);
 219                 subnode = offset_to_ofnode(ooffset);
 220         }
 221         debug("%s\n", ofnode_valid(subnode) ?
 222               ofnode_get_name(subnode) : "<none>");
 223
 224         return subnode;
 225 }
 226
 227 int ofnode_read_u32_array(ofnode node, const char *propname,
 228                           u32 *out_values, size_t sz)
 229 {
 230         assert(ofnode_valid(node));
 231         debug("%s: %s: ", __func__, propname);
 232
 233         if (ofnode_is_np(node)) {
 234                 return of_read_u32_array(ofnode_to_np(node), propname,
 235                                          out_values, sz);
 236         } else {
 237                 return fdtdec_get_int_array(gd->fdt_blob,
 238                                             ofnode_to_offset(node), propname,
 239                                             out_values, sz);
 240         }
 241 }
 242
 243 #if !CONFIG_IS_ENABLED(DM_INLINE_OFNODE)
 244 bool ofnode_is_enabled(ofnode node)
 245 {
 246         if (ofnode_is_np(node)) {
 247                 return of_device_is_available(ofnode_to_np(node));
 248         } else {
 249                 return fdtdec_get_is_enabled(gd->fdt_blob,
 250                                              ofnode_to_offset(node));
 251         }
 252 }
 253
 254 ofnode ofnode_first_subnode(ofnode node)
 255 {
 256         assert(ofnode_valid(node));
 257         if (ofnode_is_np(node))
 258                 return np_to_ofnode(node.np->child);
 259
 260         return offset_to_ofnode(
 261                 fdt_first_subnode(gd->fdt_blob, ofnode_to_offset(node)));
 262 }
 263
 264 ofnode ofnode_next_subnode(ofnode node)
 265 {
 266         assert(ofnode_valid(node));
 267         if (ofnode_is_np(node))
 268                 return np_to_ofnode(node.np->sibling);
 269
 270         return offset_to_ofnode(
 271                 fdt_next_subnode(gd->fdt_blob, ofnode_to_offset(node)));
 272 }
 273 #endif /* !DM_INLINE_OFNODE */
 274
 275 ofnode ofnode_get_parent(ofnode node)
 276 {
 277         ofnode parent;
 278
 279         assert(ofnode_valid(node));
 280         if (ofnode_is_np(node))
 281                 parent = np_to_ofnode(of_get_parent(ofnode_to_np(node)));
 282         else
 283                 parent.of_offset = fdt_parent_offset(gd->fdt_blob,
 284                                                      ofnode_to_offset(node));
 285
 286         return parent;
 287 }
 288
 289 const char *ofnode_get_name(ofnode node)
 290 {
 291         if (!ofnode_valid(node)) {
 292                 debug("%s node not valid\n", __func__);
 293                 return NULL;
 294         }
 295
 296         if (ofnode_is_np(node))
 297                 return strrchr(node.np->full_name, '/') + 1;
 298
 299         return fdt_get_name(gd->fdt_blob, ofnode_to_offset(node), NULL);
 300 }
 301
 302 int ofnode_get_path(ofnode node, char *buf, int buflen)
 303 {
 304         assert(ofnode_valid(node));
 305
 306         if (ofnode_is_np(node)) {
 307                 if (strlen(node.np->full_name) >= buflen)
 308                         return -ENOSPC;
 309
 310                 strcpy(buf, node.np->full_name);
 311
 312                 return 0;
 313         } else {
 314                 int res;
 315
 316                 res = fdt_get_path(gd->fdt_blob, ofnode_to_offset(node), buf,
 317                                    buflen);
 318                 if (!res)
 319                         return res;
 320                 else if (res == -FDT_ERR_NOSPACE)
 321                         return -ENOSPC;
 322                 else
 323                         return -EINVAL;
 324         }
 325 }
 326
 327 ofnode ofnode_get_by_phandle(uint phandle)
 328 {
 329         ofnode node;
 330
 331         if (of_live_active())
 332                 node = np_to_ofnode(of_find_node_by_phandle(phandle));
 333         else
 334                 node.of_offset = fdt_node_offset_by_phandle(gd->fdt_blob,
 335                                                             phandle);
 336
 337         return node;
 338 }
 339
 340 static fdt_addr_t __ofnode_get_addr_size_index(ofnode node, int index,
 341                                                fdt_size_t *size, bool translate)
 342 {
 343         int na, ns;
 344
 345         if (size)
 346                 *size = FDT_SIZE_T_NONE;
 347
 348         if (ofnode_is_np(node)) {
 349                 const __be32 *prop_val;
 350                 u64 size64;
 351                 uint flags;
 352
 353                 prop_val = of_get_address(ofnode_to_np(node), index, &size64,
 354                                           &flags);
 355                 if (!prop_val)
 356                         return FDT_ADDR_T_NONE;
 357
 358                 if (size)
 359                         *size = size64;
 360
 361                 ns = of_n_size_cells(ofnode_to_np(node));
 362
 363                 if (translate && IS_ENABLED(CONFIG_OF_TRANSLATE) && ns > 0) {
 364                         return of_translate_address(ofnode_to_np(node), prop_val);
 365                 } else {
 366                         na = of_n_addr_cells(ofnode_to_np(node));
 367                         return of_read_number(prop_val, na);
 368                 }
 369         } else {
 370                 na = ofnode_read_simple_addr_cells(ofnode_get_parent(node));
 371                 ns = ofnode_read_simple_size_cells(ofnode_get_parent(node));
 372                 return fdtdec_get_addr_size_fixed(gd->fdt_blob,
 373                                                   ofnode_to_offset(node), "reg",
 374                                                   index, na, ns, size,
 375                                                   translate);
 376         }
 377 }
 378
 379 fdt_addr_t ofnode_get_addr_size_index(ofnode node, int index, fdt_size_t *size)
 380 {
 381         return __ofnode_get_addr_size_index(node, index, size, true);
 382 }
 383
 384 fdt_addr_t ofnode_get_addr_size_index_notrans(ofnode node, int index,
 385                                               fdt_size_t *size)
 386 {
 387         return __ofnode_get_addr_size_index(node, index, size, false);
 388 }
 389
 390 fdt_addr_t ofnode_get_addr_index(ofnode node, int index)
 391 {
 392         fdt_size_t size;
 393
 394         return ofnode_get_addr_size_index(node, index, &size);
 395 }
 396
 397 fdt_addr_t ofnode_get_addr(ofnode node)
 398 {
 399         return ofnode_get_addr_index(node, 0);
 400 }
 401
 402 fdt_size_t ofnode_get_size(ofnode node)
 403 {
 404         fdt_size_t size;
 405
 406         ofnode_get_addr_size_index(node, 0, &size);
 407
 408         return size;
 409 }
 410
 411 int ofnode_stringlist_search(ofnode node, const char *property,
 412                              const char *string)
 413 {
 414         if (ofnode_is_np(node)) {
 415                 return of_property_match_string(ofnode_to_np(node),
 416                                                 property, string);
 417         } else {
 418                 int ret;
 419
 420                 ret = fdt_stringlist_search(gd->fdt_blob,
 421                                             ofnode_to_offset(node), property,
 422                                             string);
 423                 if (ret == -FDT_ERR_NOTFOUND)
 424                         return -ENODATA;
 425                 else if (ret < 0)
 426                         return -EINVAL;
 427
 428                 return ret;
 429         }
 430 }
 431
 432 int ofnode_read_string_index(ofnode node, const char *property, int index,
 433                              const char **outp)
 434 {
 435         if (ofnode_is_np(node)) {
 436                 return of_property_read_string_index(ofnode_to_np(node),
 437                                                      property, index, outp);
 438         } else {
 439                 int len;
 440
 441                 *outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node),
 442                                            property, index, &len);
 443                 if (len < 0)
 444                         return -EINVAL;
 445                 return 0;
 446         }
 447 }
 448
 449 int ofnode_read_string_count(ofnode node, const char *property)
 450 {
 451         if (ofnode_is_np(node)) {
 452                 return of_property_count_strings(ofnode_to_np(node), property);
 453         } else {
 454                 return fdt_stringlist_count(gd->fdt_blob,
 455                                             ofnode_to_offset(node), property);
 456         }
 457 }
 458
 459 int ofnode_read_string_list(ofnode node, const char *property,
 460                             const char ***listp)
 461 {
 462         const char **prop;
 463         int count;
 464         int i;
 465
 466         *listp = NULL;
 467         count = ofnode_read_string_count(node, property);
 468         if (count < 0)
 469                 return count;
 470         if (!count)
 471                 return 0;
 472
 473         prop = calloc(count + 1, sizeof(char *));
 474         if (!prop)
 475                 return -ENOMEM;
 476
 477         for (i = 0; i < count; i++)
 478                 ofnode_read_string_index(node, property, i, &prop[i]);
 479         prop[count] = NULL;
 480         *listp = prop;
 481
 482         return count;
 483 }
 484
 485 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in,
 486                                             struct ofnode_phandle_args *out)
 487 {
 488         assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
 489         out->node = offset_to_ofnode(in->node);
 490         out->args_count = in->args_count;
 491         memcpy(out->args, in->args, sizeof(out->args));
 492 }
 493
 494 static void ofnode_from_of_phandle_args(struct of_phandle_args *in,
 495                                         struct ofnode_phandle_args *out)
 496 {
 497         assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
 498         out->node = np_to_ofnode(in->np);
 499         out->args_count = in->args_count;
 500         memcpy(out->args, in->args, sizeof(out->args));
 501 }
 502
 503 int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
 504                                    const char *cells_name, int cell_count,
 505                                    int index,
 506                                    struct ofnode_phandle_args *out_args)
 507 {
 508         if (ofnode_is_np(node)) {
 509                 struct of_phandle_args args;
 510                 int ret;
 511
 512                 ret = of_parse_phandle_with_args(ofnode_to_np(node),
 513                                                  list_name, cells_name,
 514                                                  cell_count, index,
 515                                                  &args);
 516                 if (ret)
 517                         return ret;
 518                 ofnode_from_of_phandle_args(&args, out_args);
 519         } else {
 520                 struct fdtdec_phandle_args args;
 521                 int ret;
 522
 523                 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob,
 524                                                      ofnode_to_offset(node),
 525                                                      list_name, cells_name,
 526                                                      cell_count, index, &args);
 527                 if (ret)
 528                         return ret;
 529                 ofnode_from_fdtdec_phandle_args(&args, out_args);
 530         }
 531
 532         return 0;
 533 }
 534
 535 int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
 536                                    const char *cells_name, int cell_count)
 537 {
 538         if (ofnode_is_np(node))
 539                 return of_count_phandle_with_args(ofnode_to_np(node),
 540                                 list_name, cells_name, cell_count);
 541         else
 542                 return fdtdec_parse_phandle_with_args(gd->fdt_blob,
 543                                 ofnode_to_offset(node), list_name, cells_name,
 544                                 cell_count, -1, NULL);
 545 }
 546
 547 ofnode ofnode_path(const char *path)
 548 {
 549         if (of_live_active())
 550                 return np_to_ofnode(of_find_node_by_path(path));
 551         else
 552                 return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path));
 553 }
 554
 555 const void *ofnode_read_chosen_prop(const char *propname, int *sizep)
 556 {
 557         ofnode chosen_node;
 558
 559         chosen_node = ofnode_path("/chosen");
 560
 561         return ofnode_read_prop(chosen_node, propname, sizep);
 562 }
 563
 564 const char *ofnode_read_chosen_string(const char *propname)
 565 {
 566         return ofnode_read_chosen_prop(propname, NULL);
 567 }
 568
 569 ofnode ofnode_get_chosen_node(const char *name)
 570 {
 571         const char *prop;
 572
 573         prop = ofnode_read_chosen_prop(name, NULL);
 574         if (!prop)
 575                 return ofnode_null();
 576
 577         return ofnode_path(prop);
 578 }
 579
 580 const void *ofnode_read_aliases_prop(const char *propname, int *sizep)
 581 {
 582         ofnode node;
 583
 584         node = ofnode_path("/aliases");
 585
 586         return ofnode_read_prop(node, propname, sizep);
 587 }
 588
 589 ofnode ofnode_get_aliases_node(const char *name)
 590 {
 591         const char *prop;
 592
 593         prop = ofnode_read_aliases_prop(name, NULL);
 594         if (!prop)
 595                 return ofnode_null();
 596
 597         debug("%s: node_path: %s\n", __func__, prop);
 598
 599         return ofnode_path(prop);
 600 }
 601
 602 int ofnode_get_child_count(ofnode parent)
 603 {
 604         ofnode child;
 605         int num = 0;
 606
 607         ofnode_for_each_subnode(child, parent)
 608                 num++;
 609
 610         return num;
 611 }
 612
 613 static int decode_timing_property(ofnode node, const char *name,
 614                                   struct timing_entry *result)
 615 {
 616         int length, ret = 0;
 617
 618         length = ofnode_read_size(node, name);
 619         if (length < 0) {
 620                 debug("%s: could not find property %s\n",
 621                       ofnode_get_name(node), name);
 622                 return length;
 623         }
 624
 625         if (length == sizeof(u32)) {
 626                 result->typ = ofnode_read_u32_default(node, name, 0);
 627                 result->min = result->typ;
 628                 result->max = result->typ;
 629         } else {
 630                 ret = ofnode_read_u32_array(node, name, &result->min, 3);
 631         }
 632
 633         return ret;
 634 }
 635
 636 int ofnode_decode_display_timing(ofnode parent, int index,
 637                                  struct display_timing *dt)
 638 {
 639         int i;
 640         ofnode timings, node;
 641         u32 val = 0;
 642         int ret = 0;
 643
 644         timings = ofnode_find_subnode(parent, "display-timings");
 645         if (!ofnode_valid(timings))
 646                 return -EINVAL;
 647
 648         i = 0;
 649         ofnode_for_each_subnode(node, timings) {
 650                 if (i++ == index)
 651                         break;
 652         }
 653
 654         if (!ofnode_valid(node))
 655                 return -EINVAL;
 656
 657         memset(dt, 0, sizeof(*dt));
 658
 659         ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch);
 660         ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch);
 661         ret |= decode_timing_property(node, "hactive", &dt->hactive);
 662         ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len);
 663         ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch);
 664         ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch);
 665         ret |= decode_timing_property(node, "vactive", &dt->vactive);
 666         ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len);
 667         ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock);
 668
 669         dt->flags = 0;
 670         val = ofnode_read_u32_default(node, "vsync-active", -1);
 671         if (val != -1) {
 672                 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
 673                                 DISPLAY_FLAGS_VSYNC_LOW;
 674         }
 675         val = ofnode_read_u32_default(node, "hsync-active", -1);
 676         if (val != -1) {
 677                 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
 678                                 DISPLAY_FLAGS_HSYNC_LOW;
 679         }
 680         val = ofnode_read_u32_default(node, "de-active", -1);
 681         if (val != -1) {
 682                 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
 683                                 DISPLAY_FLAGS_DE_LOW;
 684         }
 685         val = ofnode_read_u32_default(node, "pixelclk-active", -1);
 686         if (val != -1) {
 687                 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
 688                                 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
 689         }
 690
 691         if (ofnode_read_bool(node, "interlaced"))
 692                 dt->flags |= DISPLAY_FLAGS_INTERLACED;
 693         if (ofnode_read_bool(node, "doublescan"))
 694                 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
 695         if (ofnode_read_bool(node, "doubleclk"))
 696                 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
 697
 698         return ret;
 699 }
 700
 701 const void *ofnode_get_property(ofnode node, const char *propname, int *lenp)
 702 {
 703         if (ofnode_is_np(node))
 704                 return of_get_property(ofnode_to_np(node), propname, lenp);
 705         else
 706                 return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
 707                                    propname, lenp);
 708 }
 709
 710 int ofnode_get_first_property(ofnode node, struct ofprop *prop)
 711 {
 712         prop->node = node;
 713
 714         if (ofnode_is_np(node)) {
 715                 prop->prop = of_get_first_property(ofnode_to_np(prop->node));
 716                 if (!prop->prop)
 717                         return -FDT_ERR_NOTFOUND;
 718         } else {
 719                 prop->offset =
 720                         fdt_first_property_offset(gd->fdt_blob,
 721                                                   ofnode_to_offset(prop->node));
 722                 if (prop->offset < 0)
 723                         return prop->offset;
 724         }
 725
 726         return 0;
 727 }
 728
 729 int ofnode_get_next_property(struct ofprop *prop)
 730 {
 731         if (ofnode_is_np(prop->node)) {
 732                 prop->prop = of_get_next_property(ofnode_to_np(prop->node),
 733                                                   prop->prop);
 734                 if (!prop->prop)
 735                         return -FDT_ERR_NOTFOUND;
 736         } else {
 737                 prop->offset = fdt_next_property_offset(gd->fdt_blob,
 738                                                         prop->offset);
 739                 if (prop->offset  < 0)
 740                         return prop->offset;
 741         }
 742
 743         return 0;
 744 }
 745
 746 const void *ofnode_get_property_by_prop(const struct ofprop *prop,
 747                                         const char **propname, int *lenp)
 748 {
 749         if (ofnode_is_np(prop->node))
 750                 return of_get_property_by_prop(ofnode_to_np(prop->node),
 751                                                prop->prop, propname, lenp);
 752         else
 753                 return fdt_getprop_by_offset(gd->fdt_blob,
 754                                              prop->offset,
 755                                              propname, lenp);
 756 }
 757
 758 bool ofnode_is_available(ofnode node)
 759 {
 760         if (ofnode_is_np(node))
 761                 return of_device_is_available(ofnode_to_np(node));
 762         else
 763                 return fdtdec_get_is_enabled(gd->fdt_blob,
 764                                              ofnode_to_offset(node));
 765 }
 766
 767 fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property,
 768                                 fdt_size_t *sizep)
 769 {
 770         if (ofnode_is_np(node)) {
 771                 int na, ns;
 772                 int psize;
 773                 const struct device_node *np = ofnode_to_np(node);
 774                 const __be32 *prop = of_get_property(np, property, &psize);
 775
 776                 if (!prop)
 777                         return FDT_ADDR_T_NONE;
 778                 na = of_n_addr_cells(np);
 779                 ns = of_n_size_cells(np);
 780                 *sizep = of_read_number(prop + na, ns);
 781
 782                 if (CONFIG_IS_ENABLED(OF_TRANSLATE) && ns > 0)
 783                         return of_translate_address(np, prop);
 784                 else
 785                         return of_read_number(prop, na);
 786         } else {
 787                 return fdtdec_get_addr_size(gd->fdt_blob,
 788                                             ofnode_to_offset(node), property,
 789                                             sizep);
 790         }
 791 }
 792
 793 const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
 794                                         size_t sz)
 795 {
 796         if (ofnode_is_np(node)) {
 797                 const struct device_node *np = ofnode_to_np(node);
 798                 int psize;
 799                 const __be32 *prop = of_get_property(np, propname, &psize);
 800
 801                 if (!prop || sz != psize)
 802                         return NULL;
 803                 return (uint8_t *)prop;
 804
 805         } else {
 806                 return fdtdec_locate_byte_array(gd->fdt_blob,
 807                                 ofnode_to_offset(node), propname, sz);
 808         }
 809 }
 810
 811 int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
 812                          const char *propname, struct fdt_pci_addr *addr)
 813 {
 814         const fdt32_t *cell;
 815         int len;
 816         int ret = -ENOENT;
 817
 818         debug("%s: %s: ", __func__, propname);
 819
 820         /*
 821          * If we follow the pci bus bindings strictly, we should check
 822          * the value of the node's parent node's #address-cells and
 823          * #size-cells. They need to be 3 and 2 accordingly. However,
 824          * for simplicity we skip the check here.
 825          */
 826         cell = ofnode_get_property(node, propname, &len);
 827         if (!cell)
 828                 goto fail;
 829
 830         if ((len % FDT_PCI_REG_SIZE) == 0) {
 831                 int num = len / FDT_PCI_REG_SIZE;
 832                 int i;
 833
 834                 for (i = 0; i < num; i++) {
 835                         debug("pci address #%d: %08lx %08lx %08lx\n", i,
 836                               (ulong)fdt32_to_cpu(cell[0]),
 837                               (ulong)fdt32_to_cpu(cell[1]),
 838                               (ulong)fdt32_to_cpu(cell[2]));
 839                         if ((fdt32_to_cpu(*cell) & type) == type) {
 840                                 addr->phys_hi = fdt32_to_cpu(cell[0]);
 841                                 addr->phys_mid = fdt32_to_cpu(cell[1]);
 842                                 addr->phys_lo = fdt32_to_cpu(cell[2]);
 843                                 break;
 844                         }
 845
 846                         cell += (FDT_PCI_ADDR_CELLS +
 847                                  FDT_PCI_SIZE_CELLS);
 848                 }
 849
 850                 if (i == num) {
 851                         ret = -ENXIO;
 852                         goto fail;
 853                 }
 854
 855                 return 0;
 856         }
 857
 858         ret = -EINVAL;
 859
 860 fail:
 861         debug("(not found)\n");
 862         return ret;
 863 }
 864
 865 int ofnode_read_pci_vendev(ofnode node, u16 *vendor, u16 *device)
 866 {
 867         const char *list, *end;
 868         int len;
 869
 870         list = ofnode_get_property(node, "compatible", &len);
 871         if (!list)
 872                 return -ENOENT;
 873
 874         end = list + len;
 875         while (list < end) {
 876                 len = strlen(list);
 877                 if (len >= strlen("pciVVVV,DDDD")) {
 878                         char *s = strstr(list, "pci");
 879
 880                         /*
 881                          * check if the string is something like pciVVVV,DDDD.RR
 882                          * or just pciVVVV,DDDD
 883                          */
 884                         if (s && s[7] == ',' &&
 885                             (s[12] == '.' || s[12] == 0)) {
 886                                 s += 3;
 887                                 *vendor = simple_strtol(s, NULL, 16);
 888
 889                                 s += 5;
 890                                 *device = simple_strtol(s, NULL, 16);
 891
 892                                 return 0;
 893                         }
 894                 }
 895                 list += (len + 1);
 896         }
 897
 898         return -ENOENT;
 899 }
 900
 901 int ofnode_read_addr_cells(ofnode node)
 902 {
 903         if (ofnode_is_np(node)) {
 904                 return of_n_addr_cells(ofnode_to_np(node));
 905         } else {
 906                 int parent = fdt_parent_offset(gd->fdt_blob,
 907                                                ofnode_to_offset(node));
 908
 909                 return fdt_address_cells(gd->fdt_blob, parent);
 910         }
 911 }
 912
 913 int ofnode_read_size_cells(ofnode node)
 914 {
 915         if (ofnode_is_np(node)) {
 916                 return of_n_size_cells(ofnode_to_np(node));
 917         } else {
 918                 int parent = fdt_parent_offset(gd->fdt_blob,
 919                                                ofnode_to_offset(node));
 920
 921                 return fdt_size_cells(gd->fdt_blob, parent);
 922         }
 923 }
 924
 925 int ofnode_read_simple_addr_cells(ofnode node)
 926 {
 927         if (ofnode_is_np(node))
 928                 return of_simple_addr_cells(ofnode_to_np(node));
 929         else
 930                 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
 931 }
 932
 933 int ofnode_read_simple_size_cells(ofnode node)
 934 {
 935         if (ofnode_is_np(node))
 936                 return of_simple_size_cells(ofnode_to_np(node));
 937         else
 938                 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
 939 }
 940
 941 bool ofnode_pre_reloc(ofnode node)
 942 {
 943 #if defined(CONFIG_SPL_BUILD) || defined(CONFIG_TPL_BUILD)
 944         /* for SPL and TPL the remaining nodes after the fdtgrep 1st pass
 945          * had property dm-pre-reloc or u-boot,dm-spl/tpl.
 946          * They are removed in final dtb (fdtgrep 2nd pass)
 947          */
 948         return true;
 949 #else
 950         if (ofnode_read_bool(node, "u-boot,dm-pre-reloc"))
 951                 return true;
 952         if (ofnode_read_bool(node, "u-boot,dm-pre-proper"))
 953                 return true;
 954
 955         /*
 956          * In regular builds individual spl and tpl handling both
 957          * count as handled pre-relocation for later second init.
 958          */
 959         if (ofnode_read_bool(node, "u-boot,dm-spl") ||
 960             ofnode_read_bool(node, "u-boot,dm-tpl"))
 961                 return true;
 962
 963         return false;
 964 #endif
 965 }
 966
 967 int ofnode_read_resource(ofnode node, uint index, struct resource *res)
 968 {
 969         if (ofnode_is_np(node)) {
 970                 return of_address_to_resource(ofnode_to_np(node), index, res);
 971         } else {
 972                 struct fdt_resource fres;
 973                 int ret;
 974
 975                 ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node),
 976                                        "reg", index, &fres);
 977                 if (ret < 0)
 978                         return -EINVAL;
 979                 memset(res, '\0', sizeof(*res));
 980                 res->start = fres.start;
 981                 res->end = fres.end;
 982
 983                 return 0;
 984         }
 985 }
 986
 987 int ofnode_read_resource_byname(ofnode node, const char *name,
 988                                 struct resource *res)
 989 {
 990         int index;
 991
 992         index = ofnode_stringlist_search(node, "reg-names", name);
 993         if (index < 0)
 994                 return index;
 995
 996         return ofnode_read_resource(node, index, res);
 997 }
 998
 999 u64 ofnode_translate_address(ofnode node, const fdt32_t *in_addr)
1000 {
1001         if (ofnode_is_np(node))
1002                 return of_translate_address(ofnode_to_np(node), in_addr);
1003         else
1004                 return fdt_translate_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
1005 }
1006
1007 u64 ofnode_translate_dma_address(ofnode node, const fdt32_t *in_addr)
1008 {
1009         if (ofnode_is_np(node))
1010                 return of_translate_dma_address(ofnode_to_np(node), in_addr);
1011         else
1012                 return fdt_translate_dma_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
1013 }
1014
1015 int ofnode_get_dma_range(ofnode node, phys_addr_t *cpu, dma_addr_t *bus, u64 *size)
1016 {
1017         if (ofnode_is_np(node))
1018                 return of_get_dma_range(ofnode_to_np(node), cpu, bus, size);
1019         else
1020                 return fdt_get_dma_range(gd->fdt_blob, ofnode_to_offset(node),
1021                                          cpu, bus, size);
1022 }
1023
1024 int ofnode_device_is_compatible(ofnode node, const char *compat)
1025 {
1026         if (ofnode_is_np(node))
1027                 return of_device_is_compatible(ofnode_to_np(node), compat,
1028                                                NULL, NULL);
1029         else
1030                 return !fdt_node_check_compatible(gd->fdt_blob,
1031                                                   ofnode_to_offset(node),
1032                                                   compat);
1033 }
1034
1035 ofnode ofnode_by_compatible(ofnode from, const char *compat)
1036 {
1037         if (of_live_active()) {
1038                 return np_to_ofnode(of_find_compatible_node(
1039                         (struct device_node *)ofnode_to_np(from), NULL,
1040                         compat));
1041         } else {
1042                 return offset_to_ofnode(fdt_node_offset_by_compatible(
1043                                 gd->fdt_blob, ofnode_to_offset(from), compat));
1044         }
1045 }
1046
1047 ofnode ofnode_by_prop_value(ofnode from, const char *propname,
1048                             const void *propval, int proplen)
1049 {
1050         if (of_live_active()) {
1051                 return np_to_ofnode(of_find_node_by_prop_value(
1052                         (struct device_node *)ofnode_to_np(from), propname,
1053                         propval, proplen));
1054         } else {
1055                 return offset_to_ofnode(fdt_node_offset_by_prop_value(
1056                                 gd->fdt_blob, ofnode_to_offset(from),
1057                                 propname, propval, proplen));
1058         }
1059 }
1060
1061 int ofnode_write_prop(ofnode node, const char *propname, int len,
1062                       const void *value)
1063 {
1064         const struct device_node *np = ofnode_to_np(node);
1065         struct property *pp;
1066         struct property *pp_last = NULL;
1067         struct property *new;
1068
1069         if (!of_live_active())
1070                 return -ENOSYS;
1071
1072         if (!np)
1073                 return -EINVAL;
1074
1075         for (pp = np->properties; pp; pp = pp->next) {
1076                 if (strcmp(pp->name, propname) == 0) {
1077                         /* Property exists -> change value */
1078                         pp->value = (void *)value;
1079                         pp->length = len;
1080                         return 0;
1081                 }
1082                 pp_last = pp;
1083         }
1084
1085         if (!pp_last)
1086                 return -ENOENT;
1087
1088         /* Property does not exist -> append new property */
1089         new = malloc(sizeof(struct property));
1090         if (!new)
1091                 return -ENOMEM;
1092
1093         new->name = strdup(propname);
1094         if (!new->name) {
1095                 free(new);
1096                 return -ENOMEM;
1097         }
1098
1099         new->value = (void *)value;
1100         new->length = len;
1101         new->next = NULL;
1102
1103         pp_last->next = new;
1104
1105         return 0;
1106 }
1107
1108 int ofnode_write_string(ofnode node, const char *propname, const char *value)
1109 {
1110         if (!of_live_active())
1111                 return -ENOSYS;
1112
1113         assert(ofnode_valid(node));
1114
1115         debug("%s: %s = %s", __func__, propname, value);
1116
1117         return ofnode_write_prop(node, propname, strlen(value) + 1, value);
1118 }
1119
1120 int ofnode_set_enabled(ofnode node, bool value)
1121 {
1122         if (!of_live_active())
1123                 return -ENOSYS;
1124
1125         assert(ofnode_valid(node));
1126
1127         if (value)
1128                 return ofnode_write_string(node, "status", "okay");
1129         else
1130                 return ofnode_write_string(node, "status", "disabled");
1131 }
1132
1133 bool ofnode_conf_read_bool(const char *prop_name)
1134 {
1135         ofnode node;
1136
1137         node = ofnode_path("/config");
1138         if (!ofnode_valid(node))
1139                 return false;
1140
1141         return ofnode_read_bool(node, prop_name);
1142 }
1143
1144 int ofnode_conf_read_int(const char *prop_name, int default_val)
1145 {
1146         ofnode node;
1147
1148         node = ofnode_path("/config");
1149         if (!ofnode_valid(node))
1150                 return default_val;
1151
1152         return ofnode_read_u32_default(node, prop_name, default_val);
1153 }
1154
1155 const char *ofnode_conf_read_str(const char *prop_name)
1156 {
1157         ofnode node;
1158
1159         node = ofnode_path("/config");
1160         if (!ofnode_valid(node))
1161                 return NULL;
1162
1163         return ofnode_read_string(node, prop_name);
1164 }