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