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
  20 int ofnode_read_u32(ofnode node, const char *propname, u32 *outp)
  21 {
  22         return ofnode_read_u32_index(node, propname, 0, outp);
  23 }
  24
  25 u32 ofnode_read_u32_default(ofnode node, const char *propname, u32 def)
  26 {
  27         assert(ofnode_valid(node));
  28         ofnode_read_u32_index(node, propname, 0, &def);
  29
  30         return def;
  31 }
  32
  33 int ofnode_read_u32_index(ofnode node, const char *propname, int index,
  34                           u32 *outp)
  35 {
  36         const fdt32_t *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_u32_index(ofnode_to_np(node), propname, index,
  44                                          outp);
  45
  46         cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
  47                            &len);
  48         if (!cell) {
  49                 debug("(not found)\n");
  50                 return -EINVAL;
  51         }
  52
  53         if (len < (sizeof(int) * (index + 1))) {
  54                 debug("(not large enough)\n");
  55                 return -EOVERFLOW;
  56         }
  57
  58         *outp = fdt32_to_cpu(cell[index]);
  59         debug("%#x (%d)\n", *outp, *outp);
  60
  61         return 0;
  62 }
  63
  64 u32 ofnode_read_u32_index_default(ofnode node, const char *propname, int index,
  65                                   u32 def)
  66 {
  67         assert(ofnode_valid(node));
  68         ofnode_read_u32_index(node, propname, index, &def);
  69
  70         return def;
  71 }
  72
  73 int ofnode_read_s32_default(ofnode node, const char *propname, s32 def)
  74 {
  75         assert(ofnode_valid(node));
  76         ofnode_read_u32(node, propname, (u32 *)&def);
  77
  78         return def;
  79 }
  80
  81 int ofnode_read_u64(ofnode node, const char *propname, u64 *outp)
  82 {
  83         const unaligned_fdt64_t *cell;
  84         int len;
  85
  86         assert(ofnode_valid(node));
  87         debug("%s: %s: ", __func__, propname);
  88
  89         if (ofnode_is_np(node))
  90                 return of_read_u64(ofnode_to_np(node), propname, outp);
  91
  92         cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
  93                            &len);
  94         if (!cell || len < sizeof(*cell)) {
  95                 debug("(not found)\n");
  96                 return -EINVAL;
  97         }
  98         *outp = fdt64_to_cpu(cell[0]);
  99         debug("%#llx (%lld)\n", (unsigned long long)*outp,
 100               (unsigned long long)*outp);
 101
 102         return 0;
 103 }
 104
 105 u64 ofnode_read_u64_default(ofnode node, const char *propname, u64 def)
 106 {
 107         assert(ofnode_valid(node));
 108         ofnode_read_u64(node, propname, &def);
 109
 110         return def;
 111 }
 112
 113 bool ofnode_read_bool(ofnode node, const char *propname)
 114 {
 115         const void *prop;
 116
 117         assert(ofnode_valid(node));
 118         debug("%s: %s: ", __func__, propname);
 119
 120         prop = ofnode_get_property(node, propname, NULL);
 121
 122         debug("%s\n", prop ? "true" : "false");
 123
 124         return prop ? true : false;
 125 }
 126
 127 const void *ofnode_read_prop(ofnode node, const char *propname, int *sizep)
 128 {
 129         const char *val = NULL;
 130         int len;
 131
 132         assert(ofnode_valid(node));
 133         debug("%s: %s: ", __func__, propname);
 134
 135         if (ofnode_is_np(node)) {
 136                 struct property *prop = of_find_property(
 137                                 ofnode_to_np(node), propname, &len);
 138
 139                 if (prop) {
 140                         val = prop->value;
 141                         len = prop->length;
 142                 }
 143         } else {
 144                 val = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
 145                                   propname, &len);
 146         }
 147         if (!val) {
 148                 debug("<not found>\n");
 149                 if (sizep)
 150                         *sizep = -FDT_ERR_NOTFOUND;
 151                 return NULL;
 152         }
 153         if (sizep)
 154                 *sizep = len;
 155
 156         return val;
 157 }
 158
 159 const char *ofnode_read_string(ofnode node, const char *propname)
 160 {
 161         const char *str;
 162         int len;
 163
 164         str = ofnode_read_prop(node, propname, &len);
 165         if (!str)
 166                 return NULL;
 167
 168         if (strnlen(str, len) >= len) {
 169                 debug("<invalid>\n");
 170                 return NULL;
 171         }
 172         debug("%s\n", str);
 173
 174         return str;
 175 }
 176
 177 int ofnode_read_size(ofnode node, const char *propname)
 178 {
 179         int len;
 180
 181         if (!ofnode_read_prop(node, propname, &len))
 182                 return -EINVAL;
 183
 184         return len;
 185 }
 186
 187 ofnode ofnode_find_subnode(ofnode node, const char *subnode_name)
 188 {
 189         ofnode subnode;
 190
 191         assert(ofnode_valid(node));
 192         debug("%s: %s: ", __func__, subnode_name);
 193
 194         if (ofnode_is_np(node)) {
 195                 const struct device_node *np = ofnode_to_np(node);
 196
 197                 for (np = np->child; np; np = np->sibling) {
 198                         if (!strcmp(subnode_name, np->name))
 199                                 break;
 200                 }
 201                 subnode = np_to_ofnode(np);
 202         } else {
 203                 int ooffset = fdt_subnode_offset(gd->fdt_blob,
 204                                 ofnode_to_offset(node), subnode_name);
 205                 subnode = offset_to_ofnode(ooffset);
 206         }
 207         debug("%s\n", ofnode_valid(subnode) ?
 208               ofnode_get_name(subnode) : "<none>");
 209
 210         return subnode;
 211 }
 212
 213 int ofnode_read_u32_array(ofnode node, const char *propname,
 214                           u32 *out_values, size_t sz)
 215 {
 216         assert(ofnode_valid(node));
 217         debug("%s: %s: ", __func__, propname);
 218
 219         if (ofnode_is_np(node)) {
 220                 return of_read_u32_array(ofnode_to_np(node), propname,
 221                                          out_values, sz);
 222         } else {
 223                 return fdtdec_get_int_array(gd->fdt_blob,
 224                                             ofnode_to_offset(node), propname,
 225                                             out_values, sz);
 226         }
 227 }
 228
 229 #if !CONFIG_IS_ENABLED(DM_INLINE_OFNODE)
 230 bool ofnode_is_enabled(ofnode node)
 231 {
 232         if (ofnode_is_np(node)) {
 233                 return of_device_is_available(ofnode_to_np(node));
 234         } else {
 235                 return fdtdec_get_is_enabled(gd->fdt_blob,
 236                                              ofnode_to_offset(node));
 237         }
 238 }
 239
 240 ofnode ofnode_first_subnode(ofnode node)
 241 {
 242         assert(ofnode_valid(node));
 243         if (ofnode_is_np(node))
 244                 return np_to_ofnode(node.np->child);
 245
 246         return offset_to_ofnode(
 247                 fdt_first_subnode(gd->fdt_blob, ofnode_to_offset(node)));
 248 }
 249
 250 ofnode ofnode_next_subnode(ofnode node)
 251 {
 252         assert(ofnode_valid(node));
 253         if (ofnode_is_np(node))
 254                 return np_to_ofnode(node.np->sibling);
 255
 256         return offset_to_ofnode(
 257                 fdt_next_subnode(gd->fdt_blob, ofnode_to_offset(node)));
 258 }
 259 #endif /* !DM_INLINE_OFNODE */
 260
 261 ofnode ofnode_get_parent(ofnode node)
 262 {
 263         ofnode parent;
 264
 265         assert(ofnode_valid(node));
 266         if (ofnode_is_np(node))
 267                 parent = np_to_ofnode(of_get_parent(ofnode_to_np(node)));
 268         else
 269                 parent.of_offset = fdt_parent_offset(gd->fdt_blob,
 270                                                      ofnode_to_offset(node));
 271
 272         return parent;
 273 }
 274
 275 const char *ofnode_get_name(ofnode node)
 276 {
 277         if (!ofnode_valid(node)) {
 278                 debug("%s node not valid\n", __func__);
 279                 return NULL;
 280         }
 281
 282         if (ofnode_is_np(node))
 283                 return strrchr(node.np->full_name, '/') + 1;
 284
 285         return fdt_get_name(gd->fdt_blob, ofnode_to_offset(node), NULL);
 286 }
 287
 288 ofnode ofnode_get_by_phandle(uint phandle)
 289 {
 290         ofnode node;
 291
 292         if (of_live_active())
 293                 node = np_to_ofnode(of_find_node_by_phandle(phandle));
 294         else
 295                 node.of_offset = fdt_node_offset_by_phandle(gd->fdt_blob,
 296                                                             phandle);
 297
 298         return node;
 299 }
 300
 301 fdt_addr_t ofnode_get_addr_size_index(ofnode node, int index, fdt_size_t *size)
 302 {
 303         int na, ns;
 304
 305         if (ofnode_is_np(node)) {
 306                 const __be32 *prop_val;
 307                 u64 size64;
 308                 uint flags;
 309
 310                 prop_val = of_get_address(ofnode_to_np(node), index, &size64,
 311                                           &flags);
 312                 if (!prop_val)
 313                         return FDT_ADDR_T_NONE;
 314                 if (size)
 315                         *size = size64;
 316
 317                 ns = of_n_size_cells(ofnode_to_np(node));
 318
 319                 if (IS_ENABLED(CONFIG_OF_TRANSLATE) && ns > 0) {
 320                         return of_translate_address(ofnode_to_np(node), prop_val);
 321                 } else {
 322                         na = of_n_addr_cells(ofnode_to_np(node));
 323                         return of_read_number(prop_val, na);
 324                 }
 325         } else {
 326                 na = ofnode_read_simple_addr_cells(ofnode_get_parent(node));
 327                 ns = ofnode_read_simple_size_cells(ofnode_get_parent(node));
 328                 return fdtdec_get_addr_size_fixed(gd->fdt_blob,
 329                                                   ofnode_to_offset(node), "reg",
 330                                                   index, na, ns, size, true);
 331         }
 332
 333         return FDT_ADDR_T_NONE;
 334 }
 335
 336 fdt_addr_t ofnode_get_addr_index(ofnode node, int index)
 337 {
 338         fdt_size_t size;
 339
 340         return ofnode_get_addr_size_index(node, index, &size);
 341 }
 342
 343 fdt_addr_t ofnode_get_addr(ofnode node)
 344 {
 345         return ofnode_get_addr_index(node, 0);
 346 }
 347
 348 int ofnode_stringlist_search(ofnode node, const char *property,
 349                              const char *string)
 350 {
 351         if (ofnode_is_np(node)) {
 352                 return of_property_match_string(ofnode_to_np(node),
 353                                                 property, string);
 354         } else {
 355                 int ret;
 356
 357                 ret = fdt_stringlist_search(gd->fdt_blob,
 358                                             ofnode_to_offset(node), property,
 359                                             string);
 360                 if (ret == -FDT_ERR_NOTFOUND)
 361                         return -ENODATA;
 362                 else if (ret < 0)
 363                         return -EINVAL;
 364
 365                 return ret;
 366         }
 367 }
 368
 369 int ofnode_read_string_index(ofnode node, const char *property, int index,
 370                              const char **outp)
 371 {
 372         if (ofnode_is_np(node)) {
 373                 return of_property_read_string_index(ofnode_to_np(node),
 374                                                      property, index, outp);
 375         } else {
 376                 int len;
 377
 378                 *outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node),
 379                                            property, index, &len);
 380                 if (len < 0)
 381                         return -EINVAL;
 382                 return 0;
 383         }
 384 }
 385
 386 int ofnode_read_string_count(ofnode node, const char *property)
 387 {
 388         if (ofnode_is_np(node)) {
 389                 return of_property_count_strings(ofnode_to_np(node), property);
 390         } else {
 391                 return fdt_stringlist_count(gd->fdt_blob,
 392                                             ofnode_to_offset(node), property);
 393         }
 394 }
 395
 396 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in,
 397                                             struct ofnode_phandle_args *out)
 398 {
 399         assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
 400         out->node = offset_to_ofnode(in->node);
 401         out->args_count = in->args_count;
 402         memcpy(out->args, in->args, sizeof(out->args));
 403 }
 404
 405 static void ofnode_from_of_phandle_args(struct of_phandle_args *in,
 406                                         struct ofnode_phandle_args *out)
 407 {
 408         assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
 409         out->node = np_to_ofnode(in->np);
 410         out->args_count = in->args_count;
 411         memcpy(out->args, in->args, sizeof(out->args));
 412 }
 413
 414 int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
 415                                    const char *cells_name, int cell_count,
 416                                    int index,
 417                                    struct ofnode_phandle_args *out_args)
 418 {
 419         if (ofnode_is_np(node)) {
 420                 struct of_phandle_args args;
 421                 int ret;
 422
 423                 ret = of_parse_phandle_with_args(ofnode_to_np(node),
 424                                                  list_name, cells_name,
 425                                                  cell_count, index,
 426                                                  &args);
 427                 if (ret)
 428                         return ret;
 429                 ofnode_from_of_phandle_args(&args, out_args);
 430         } else {
 431                 struct fdtdec_phandle_args args;
 432                 int ret;
 433
 434                 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob,
 435                                                      ofnode_to_offset(node),
 436                                                      list_name, cells_name,
 437                                                      cell_count, index, &args);
 438                 if (ret)
 439                         return ret;
 440                 ofnode_from_fdtdec_phandle_args(&args, out_args);
 441         }
 442
 443         return 0;
 444 }
 445
 446 int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
 447                                    const char *cells_name, int cell_count)
 448 {
 449         if (ofnode_is_np(node))
 450                 return of_count_phandle_with_args(ofnode_to_np(node),
 451                                 list_name, cells_name, cell_count);
 452         else
 453                 return fdtdec_parse_phandle_with_args(gd->fdt_blob,
 454                                 ofnode_to_offset(node), list_name, cells_name,
 455                                 cell_count, -1, NULL);
 456 }
 457
 458 ofnode ofnode_path(const char *path)
 459 {
 460         if (of_live_active())
 461                 return np_to_ofnode(of_find_node_by_path(path));
 462         else
 463                 return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path));
 464 }
 465
 466 const void *ofnode_read_chosen_prop(const char *propname, int *sizep)
 467 {
 468         ofnode chosen_node;
 469
 470         chosen_node = ofnode_path("/chosen");
 471
 472         return ofnode_read_prop(chosen_node, propname, sizep);
 473 }
 474
 475 const char *ofnode_read_chosen_string(const char *propname)
 476 {
 477         return ofnode_read_chosen_prop(propname, NULL);
 478 }
 479
 480 ofnode ofnode_get_chosen_node(const char *name)
 481 {
 482         const char *prop;
 483
 484         prop = ofnode_read_chosen_prop(name, NULL);
 485         if (!prop)
 486                 return ofnode_null();
 487
 488         return ofnode_path(prop);
 489 }
 490
 491 const void *ofnode_read_aliases_prop(const char *propname, int *sizep)
 492 {
 493         ofnode node;
 494
 495         node = ofnode_path("/aliases");
 496
 497         return ofnode_read_prop(node, propname, sizep);
 498 }
 499
 500 ofnode ofnode_get_aliases_node(const char *name)
 501 {
 502         const char *prop;
 503
 504         prop = ofnode_read_aliases_prop(name, NULL);
 505         if (!prop)
 506                 return ofnode_null();
 507
 508         debug("%s: node_path: %s\n", __func__, prop);
 509
 510         return ofnode_path(prop);
 511 }
 512
 513 int ofnode_get_child_count(ofnode parent)
 514 {
 515         ofnode child;
 516         int num = 0;
 517
 518         ofnode_for_each_subnode(child, parent)
 519                 num++;
 520
 521         return num;
 522 }
 523
 524 static int decode_timing_property(ofnode node, const char *name,
 525                                   struct timing_entry *result)
 526 {
 527         int length, ret = 0;
 528
 529         length = ofnode_read_size(node, name);
 530         if (length < 0) {
 531                 debug("%s: could not find property %s\n",
 532                       ofnode_get_name(node), name);
 533                 return length;
 534         }
 535
 536         if (length == sizeof(u32)) {
 537                 result->typ = ofnode_read_u32_default(node, name, 0);
 538                 result->min = result->typ;
 539                 result->max = result->typ;
 540         } else {
 541                 ret = ofnode_read_u32_array(node, name, &result->min, 3);
 542         }
 543
 544         return ret;
 545 }
 546
 547 int ofnode_decode_display_timing(ofnode parent, int index,
 548                                  struct display_timing *dt)
 549 {
 550         int i;
 551         ofnode timings, node;
 552         u32 val = 0;
 553         int ret = 0;
 554
 555         timings = ofnode_find_subnode(parent, "display-timings");
 556         if (!ofnode_valid(timings))
 557                 return -EINVAL;
 558
 559         i = 0;
 560         ofnode_for_each_subnode(node, timings) {
 561                 if (i++ == index)
 562                         break;
 563         }
 564
 565         if (!ofnode_valid(node))
 566                 return -EINVAL;
 567
 568         memset(dt, 0, sizeof(*dt));
 569
 570         ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch);
 571         ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch);
 572         ret |= decode_timing_property(node, "hactive", &dt->hactive);
 573         ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len);
 574         ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch);
 575         ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch);
 576         ret |= decode_timing_property(node, "vactive", &dt->vactive);
 577         ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len);
 578         ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock);
 579
 580         dt->flags = 0;
 581         val = ofnode_read_u32_default(node, "vsync-active", -1);
 582         if (val != -1) {
 583                 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
 584                                 DISPLAY_FLAGS_VSYNC_LOW;
 585         }
 586         val = ofnode_read_u32_default(node, "hsync-active", -1);
 587         if (val != -1) {
 588                 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
 589                                 DISPLAY_FLAGS_HSYNC_LOW;
 590         }
 591         val = ofnode_read_u32_default(node, "de-active", -1);
 592         if (val != -1) {
 593                 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
 594                                 DISPLAY_FLAGS_DE_LOW;
 595         }
 596         val = ofnode_read_u32_default(node, "pixelclk-active", -1);
 597         if (val != -1) {
 598                 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
 599                                 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
 600         }
 601
 602         if (ofnode_read_bool(node, "interlaced"))
 603                 dt->flags |= DISPLAY_FLAGS_INTERLACED;
 604         if (ofnode_read_bool(node, "doublescan"))
 605                 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
 606         if (ofnode_read_bool(node, "doubleclk"))
 607                 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
 608
 609         return ret;
 610 }
 611
 612 const void *ofnode_get_property(ofnode node, const char *propname, int *lenp)
 613 {
 614         if (ofnode_is_np(node))
 615                 return of_get_property(ofnode_to_np(node), propname, lenp);
 616         else
 617                 return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
 618                                    propname, lenp);
 619 }
 620
 621 int ofnode_get_first_property(ofnode node, struct ofprop *prop)
 622 {
 623         prop->node = node;
 624
 625         if (ofnode_is_np(node)) {
 626                 prop->prop = of_get_first_property(ofnode_to_np(prop->node));
 627                 if (!prop->prop)
 628                         return -FDT_ERR_NOTFOUND;
 629         } else {
 630                 prop->offset =
 631                         fdt_first_property_offset(gd->fdt_blob,
 632                                                   ofnode_to_offset(prop->node));
 633                 if (prop->offset < 0)
 634                         return prop->offset;
 635         }
 636
 637         return 0;
 638 }
 639
 640 int ofnode_get_next_property(struct ofprop *prop)
 641 {
 642         if (ofnode_is_np(prop->node)) {
 643                 prop->prop = of_get_next_property(ofnode_to_np(prop->node),
 644                                                   prop->prop);
 645                 if (!prop->prop)
 646                         return -FDT_ERR_NOTFOUND;
 647         } else {
 648                 prop->offset = fdt_next_property_offset(gd->fdt_blob,
 649                                                         prop->offset);
 650                 if (prop->offset  < 0)
 651                         return prop->offset;
 652         }
 653
 654         return 0;
 655 }
 656
 657 const void *ofnode_get_property_by_prop(const struct ofprop *prop,
 658                                         const char **propname, int *lenp)
 659 {
 660         if (ofnode_is_np(prop->node))
 661                 return of_get_property_by_prop(ofnode_to_np(prop->node),
 662                                                prop->prop, propname, lenp);
 663         else
 664                 return fdt_getprop_by_offset(gd->fdt_blob,
 665                                              prop->offset,
 666                                              propname, lenp);
 667 }
 668
 669 bool ofnode_is_available(ofnode node)
 670 {
 671         if (ofnode_is_np(node))
 672                 return of_device_is_available(ofnode_to_np(node));
 673         else
 674                 return fdtdec_get_is_enabled(gd->fdt_blob,
 675                                              ofnode_to_offset(node));
 676 }
 677
 678 fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property,
 679                                 fdt_size_t *sizep)
 680 {
 681         if (ofnode_is_np(node)) {
 682                 int na, ns;
 683                 int psize;
 684                 const struct device_node *np = ofnode_to_np(node);
 685                 const __be32 *prop = of_get_property(np, property, &psize);
 686
 687                 if (!prop)
 688                         return FDT_ADDR_T_NONE;
 689                 na = of_n_addr_cells(np);
 690                 ns = of_n_size_cells(np);
 691                 *sizep = of_read_number(prop + na, ns);
 692
 693                 if (CONFIG_IS_ENABLED(OF_TRANSLATE) && ns > 0)
 694                         return of_translate_address(np, prop);
 695                 else
 696                         return of_read_number(prop, na);
 697         } else {
 698                 return fdtdec_get_addr_size(gd->fdt_blob,
 699                                             ofnode_to_offset(node), property,
 700                                             sizep);
 701         }
 702 }
 703
 704 const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
 705                                         size_t sz)
 706 {
 707         if (ofnode_is_np(node)) {
 708                 const struct device_node *np = ofnode_to_np(node);
 709                 int psize;
 710                 const __be32 *prop = of_get_property(np, propname, &psize);
 711
 712                 if (!prop || sz != psize)
 713                         return NULL;
 714                 return (uint8_t *)prop;
 715
 716         } else {
 717                 return fdtdec_locate_byte_array(gd->fdt_blob,
 718                                 ofnode_to_offset(node), propname, sz);
 719         }
 720 }
 721
 722 int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
 723                          const char *propname, struct fdt_pci_addr *addr)
 724 {
 725         const fdt32_t *cell;
 726         int len;
 727         int ret = -ENOENT;
 728
 729         debug("%s: %s: ", __func__, propname);
 730
 731         /*
 732          * If we follow the pci bus bindings strictly, we should check
 733          * the value of the node's parent node's #address-cells and
 734          * #size-cells. They need to be 3 and 2 accordingly. However,
 735          * for simplicity we skip the check here.
 736          */
 737         cell = ofnode_get_property(node, propname, &len);
 738         if (!cell)
 739                 goto fail;
 740
 741         if ((len % FDT_PCI_REG_SIZE) == 0) {
 742                 int num = len / FDT_PCI_REG_SIZE;
 743                 int i;
 744
 745                 for (i = 0; i < num; i++) {
 746                         debug("pci address #%d: %08lx %08lx %08lx\n", i,
 747                               (ulong)fdt32_to_cpu(cell[0]),
 748                               (ulong)fdt32_to_cpu(cell[1]),
 749                               (ulong)fdt32_to_cpu(cell[2]));
 750                         if ((fdt32_to_cpu(*cell) & type) == type) {
 751                                 addr->phys_hi = fdt32_to_cpu(cell[0]);
 752                                 addr->phys_mid = fdt32_to_cpu(cell[1]);
 753                                 addr->phys_lo = fdt32_to_cpu(cell[2]);
 754                                 break;
 755                         }
 756
 757                         cell += (FDT_PCI_ADDR_CELLS +
 758                                  FDT_PCI_SIZE_CELLS);
 759                 }
 760
 761                 if (i == num) {
 762                         ret = -ENXIO;
 763                         goto fail;
 764                 }
 765
 766                 return 0;
 767         }
 768
 769         ret = -EINVAL;
 770
 771 fail:
 772         debug("(not found)\n");
 773         return ret;
 774 }
 775
 776 int ofnode_read_pci_vendev(ofnode node, u16 *vendor, u16 *device)
 777 {
 778         const char *list, *end;
 779         int len;
 780
 781         list = ofnode_get_property(node, "compatible", &len);
 782         if (!list)
 783                 return -ENOENT;
 784
 785         end = list + len;
 786         while (list < end) {
 787                 len = strlen(list);
 788                 if (len >= strlen("pciVVVV,DDDD")) {
 789                         char *s = strstr(list, "pci");
 790
 791                         /*
 792                          * check if the string is something like pciVVVV,DDDD.RR
 793                          * or just pciVVVV,DDDD
 794                          */
 795                         if (s && s[7] == ',' &&
 796                             (s[12] == '.' || s[12] == 0)) {
 797                                 s += 3;
 798                                 *vendor = simple_strtol(s, NULL, 16);
 799
 800                                 s += 5;
 801                                 *device = simple_strtol(s, NULL, 16);
 802
 803                                 return 0;
 804                         }
 805                 }
 806                 list += (len + 1);
 807         }
 808
 809         return -ENOENT;
 810 }
 811
 812 int ofnode_read_addr_cells(ofnode node)
 813 {
 814         if (ofnode_is_np(node)) {
 815                 return of_n_addr_cells(ofnode_to_np(node));
 816         } else {
 817                 int parent = fdt_parent_offset(gd->fdt_blob,
 818                                                ofnode_to_offset(node));
 819
 820                 return fdt_address_cells(gd->fdt_blob, parent);
 821         }
 822 }
 823
 824 int ofnode_read_size_cells(ofnode node)
 825 {
 826         if (ofnode_is_np(node)) {
 827                 return of_n_size_cells(ofnode_to_np(node));
 828         } else {
 829                 int parent = fdt_parent_offset(gd->fdt_blob,
 830                                                ofnode_to_offset(node));
 831
 832                 return fdt_size_cells(gd->fdt_blob, parent);
 833         }
 834 }
 835
 836 int ofnode_read_simple_addr_cells(ofnode node)
 837 {
 838         if (ofnode_is_np(node))
 839                 return of_simple_addr_cells(ofnode_to_np(node));
 840         else
 841                 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
 842 }
 843
 844 int ofnode_read_simple_size_cells(ofnode node)
 845 {
 846         if (ofnode_is_np(node))
 847                 return of_simple_size_cells(ofnode_to_np(node));
 848         else
 849                 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
 850 }
 851
 852 bool ofnode_pre_reloc(ofnode node)
 853 {
 854 #if defined(CONFIG_SPL_BUILD) || defined(CONFIG_TPL_BUILD)
 855         /* for SPL and TPL the remaining nodes after the fdtgrep 1st pass
 856          * had property dm-pre-reloc or u-boot,dm-spl/tpl.
 857          * They are removed in final dtb (fdtgrep 2nd pass)
 858          */
 859         return true;
 860 #else
 861         if (ofnode_read_bool(node, "u-boot,dm-pre-reloc"))
 862                 return true;
 863         if (ofnode_read_bool(node, "u-boot,dm-pre-proper"))
 864                 return true;
 865
 866         /*
 867          * In regular builds individual spl and tpl handling both
 868          * count as handled pre-relocation for later second init.
 869          */
 870         if (ofnode_read_bool(node, "u-boot,dm-spl") ||
 871             ofnode_read_bool(node, "u-boot,dm-tpl"))
 872                 return true;
 873
 874         return false;
 875 #endif
 876 }
 877
 878 int ofnode_read_resource(ofnode node, uint index, struct resource *res)
 879 {
 880         if (ofnode_is_np(node)) {
 881                 return of_address_to_resource(ofnode_to_np(node), index, res);
 882         } else {
 883                 struct fdt_resource fres;
 884                 int ret;
 885
 886                 ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node),
 887                                        "reg", index, &fres);
 888                 if (ret < 0)
 889                         return -EINVAL;
 890                 memset(res, '\0', sizeof(*res));
 891                 res->start = fres.start;
 892                 res->end = fres.end;
 893
 894                 return 0;
 895         }
 896 }
 897
 898 int ofnode_read_resource_byname(ofnode node, const char *name,
 899                                 struct resource *res)
 900 {
 901         int index;
 902
 903         index = ofnode_stringlist_search(node, "reg-names", name);
 904         if (index < 0)
 905                 return index;
 906
 907         return ofnode_read_resource(node, index, res);
 908 }
 909
 910 u64 ofnode_translate_address(ofnode node, const fdt32_t *in_addr)
 911 {
 912         if (ofnode_is_np(node))
 913                 return of_translate_address(ofnode_to_np(node), in_addr);
 914         else
 915                 return fdt_translate_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
 916 }
 917
 918 u64 ofnode_translate_dma_address(ofnode node, const fdt32_t *in_addr)
 919 {
 920         if (ofnode_is_np(node))
 921                 return of_translate_dma_address(ofnode_to_np(node), in_addr);
 922         else
 923                 return fdt_translate_dma_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
 924 }
 925
 926 int ofnode_device_is_compatible(ofnode node, const char *compat)
 927 {
 928         if (ofnode_is_np(node))
 929                 return of_device_is_compatible(ofnode_to_np(node), compat,
 930                                                NULL, NULL);
 931         else
 932                 return !fdt_node_check_compatible(gd->fdt_blob,
 933                                                   ofnode_to_offset(node),
 934                                                   compat);
 935 }
 936
 937 ofnode ofnode_by_compatible(ofnode from, const char *compat)
 938 {
 939         if (of_live_active()) {
 940                 return np_to_ofnode(of_find_compatible_node(
 941                         (struct device_node *)ofnode_to_np(from), NULL,
 942                         compat));
 943         } else {
 944                 return offset_to_ofnode(fdt_node_offset_by_compatible(
 945                                 gd->fdt_blob, ofnode_to_offset(from), compat));
 946         }
 947 }
 948
 949 ofnode ofnode_by_prop_value(ofnode from, const char *propname,
 950                             const void *propval, int proplen)
 951 {
 952         if (of_live_active()) {
 953                 return np_to_ofnode(of_find_node_by_prop_value(
 954                         (struct device_node *)ofnode_to_np(from), propname,
 955                         propval, proplen));
 956         } else {
 957                 return offset_to_ofnode(fdt_node_offset_by_prop_value(
 958                                 gd->fdt_blob, ofnode_to_offset(from),
 959                                 propname, propval, proplen));
 960         }
 961 }
 962
 963 int ofnode_write_prop(ofnode node, const char *propname, int len,
 964                       const void *value)
 965 {
 966         const struct device_node *np = ofnode_to_np(node);
 967         struct property *pp;
 968         struct property *pp_last = NULL;
 969         struct property *new;
 970
 971         if (!of_live_active())
 972                 return -ENOSYS;
 973
 974         if (!np)
 975                 return -EINVAL;
 976
 977         for (pp = np->properties; pp; pp = pp->next) {
 978                 if (strcmp(pp->name, propname) == 0) {
 979                         /* Property exists -> change value */
 980                         pp->value = (void *)value;
 981                         pp->length = len;
 982                         return 0;
 983                 }
 984                 pp_last = pp;
 985         }
 986
 987         if (!pp_last)
 988                 return -ENOENT;
 989
 990         /* Property does not exist -> append new property */
 991         new = malloc(sizeof(struct property));
 992         if (!new)
 993                 return -ENOMEM;
 994
 995         new->name = strdup(propname);
 996         if (!new->name) {
 997                 free(new);
 998                 return -ENOMEM;
 999         }
1000
1001         new->value = (void *)value;
1002         new->length = len;
1003         new->next = NULL;
1004
1005         pp_last->next = new;
1006
1007         return 0;
1008 }
1009
1010 int ofnode_write_string(ofnode node, const char *propname, const char *value)
1011 {
1012         if (!of_live_active())
1013                 return -ENOSYS;
1014
1015         assert(ofnode_valid(node));
1016
1017         debug("%s: %s = %s", __func__, propname, value);
1018
1019         return ofnode_write_prop(node, propname, strlen(value) + 1, value);
1020 }
1021
1022 int ofnode_set_enabled(ofnode node, bool value)
1023 {
1024         if (!of_live_active())
1025                 return -ENOSYS;
1026
1027         assert(ofnode_valid(node));
1028
1029         if (value)
1030                 return ofnode_write_string(node, "status", "okay");
1031         else
1032                 return ofnode_write_string(node, "status", "disabled");
1033 }