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 int ofnode_read_u32(ofnode node, const char *propname, u32 *outp)
  22 {
  23         return ofnode_read_u32_index(node, propname, 0, outp);
  24 }
  25
  26 u32 ofnode_read_u32_default(ofnode node, const char *propname, u32 def)
  27 {
  28         assert(ofnode_valid(node));
  29         ofnode_read_u32_index(node, propname, 0, &def);
  30
  31         return def;
  32 }
  33
  34 int ofnode_read_u32_index(ofnode node, const char *propname, int index,
  35                           u32 *outp)
  36 {
  37         const fdt32_t *cell;
  38         int len;
  39
  40         assert(ofnode_valid(node));
  41         debug("%s: %s: ", __func__, propname);
  42
  43         if (ofnode_is_np(node))
  44                 return of_read_u32_index(ofnode_to_np(node), propname, index,
  45                                          outp);
  46
  47         cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
  48                            &len);
  49         if (!cell) {
  50                 debug("(not found)\n");
  51                 return -EINVAL;
  52         }
  53
  54         if (len < (sizeof(int) * (index + 1))) {
  55                 debug("(not large enough)\n");
  56                 return -EOVERFLOW;
  57         }
  58
  59         *outp = fdt32_to_cpu(cell[index]);
  60         debug("%#x (%d)\n", *outp, *outp);
  61
  62         return 0;
  63 }
  64
  65 u32 ofnode_read_u32_index_default(ofnode node, const char *propname, int index,
  66                                   u32 def)
  67 {
  68         assert(ofnode_valid(node));
  69         ofnode_read_u32_index(node, propname, index, &def);
  70
  71         return def;
  72 }
  73
  74 int ofnode_read_s32_default(ofnode node, const char *propname, s32 def)
  75 {
  76         assert(ofnode_valid(node));
  77         ofnode_read_u32(node, propname, (u32 *)&def);
  78
  79         return def;
  80 }
  81
  82 int ofnode_read_u64(ofnode node, const char *propname, u64 *outp)
  83 {
  84         const unaligned_fdt64_t *cell;
  85         int len;
  86
  87         assert(ofnode_valid(node));
  88         debug("%s: %s: ", __func__, propname);
  89
  90         if (ofnode_is_np(node))
  91                 return of_read_u64(ofnode_to_np(node), propname, outp);
  92
  93         cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
  94                            &len);
  95         if (!cell || len < sizeof(*cell)) {
  96                 debug("(not found)\n");
  97                 return -EINVAL;
  98         }
  99         *outp = fdt64_to_cpu(cell[0]);
 100         debug("%#llx (%lld)\n", (unsigned long long)*outp,
 101               (unsigned long long)*outp);
 102
 103         return 0;
 104 }
 105
 106 u64 ofnode_read_u64_default(ofnode node, const char *propname, u64 def)
 107 {
 108         assert(ofnode_valid(node));
 109         ofnode_read_u64(node, propname, &def);
 110
 111         return def;
 112 }
 113
 114 bool ofnode_read_bool(ofnode node, const char *propname)
 115 {
 116         const void *prop;
 117
 118         assert(ofnode_valid(node));
 119         debug("%s: %s: ", __func__, propname);
 120
 121         prop = ofnode_get_property(node, propname, NULL);
 122
 123         debug("%s\n", prop ? "true" : "false");
 124
 125         return prop ? true : false;
 126 }
 127
 128 const void *ofnode_read_prop(ofnode node, const char *propname, int *sizep)
 129 {
 130         const char *val = NULL;
 131         int len;
 132
 133         assert(ofnode_valid(node));
 134         debug("%s: %s: ", __func__, propname);
 135
 136         if (ofnode_is_np(node)) {
 137                 struct property *prop = of_find_property(
 138                                 ofnode_to_np(node), propname, &len);
 139
 140                 if (prop) {
 141                         val = prop->value;
 142                         len = prop->length;
 143                 }
 144         } else {
 145                 val = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
 146                                   propname, &len);
 147         }
 148         if (!val) {
 149                 debug("<not found>\n");
 150                 if (sizep)
 151                         *sizep = -FDT_ERR_NOTFOUND;
 152                 return NULL;
 153         }
 154         if (sizep)
 155                 *sizep = len;
 156
 157         return val;
 158 }
 159
 160 const char *ofnode_read_string(ofnode node, const char *propname)
 161 {
 162         const char *str;
 163         int len;
 164
 165         str = ofnode_read_prop(node, propname, &len);
 166         if (!str)
 167                 return NULL;
 168
 169         if (strnlen(str, len) >= len) {
 170                 debug("<invalid>\n");
 171                 return NULL;
 172         }
 173         debug("%s\n", str);
 174
 175         return str;
 176 }
 177
 178 int ofnode_read_size(ofnode node, const char *propname)
 179 {
 180         int len;
 181
 182         if (!ofnode_read_prop(node, propname, &len))
 183                 return -EINVAL;
 184
 185         return len;
 186 }
 187
 188 ofnode ofnode_find_subnode(ofnode node, const char *subnode_name)
 189 {
 190         ofnode subnode;
 191
 192         assert(ofnode_valid(node));
 193         debug("%s: %s: ", __func__, subnode_name);
 194
 195         if (ofnode_is_np(node)) {
 196                 const struct device_node *np = ofnode_to_np(node);
 197
 198                 for (np = np->child; np; np = np->sibling) {
 199                         if (!strcmp(subnode_name, np->name))
 200                                 break;
 201                 }
 202                 subnode = np_to_ofnode(np);
 203         } else {
 204                 int ooffset = fdt_subnode_offset(gd->fdt_blob,
 205                                 ofnode_to_offset(node), subnode_name);
 206                 subnode = offset_to_ofnode(ooffset);
 207         }
 208         debug("%s\n", ofnode_valid(subnode) ?
 209               ofnode_get_name(subnode) : "<none>");
 210
 211         return subnode;
 212 }
 213
 214 int ofnode_read_u32_array(ofnode node, const char *propname,
 215                           u32 *out_values, size_t sz)
 216 {
 217         assert(ofnode_valid(node));
 218         debug("%s: %s: ", __func__, propname);
 219
 220         if (ofnode_is_np(node)) {
 221                 return of_read_u32_array(ofnode_to_np(node), propname,
 222                                          out_values, sz);
 223         } else {
 224                 return fdtdec_get_int_array(gd->fdt_blob,
 225                                             ofnode_to_offset(node), propname,
 226                                             out_values, sz);
 227         }
 228 }
 229
 230 #if !CONFIG_IS_ENABLED(DM_INLINE_OFNODE)
 231 bool ofnode_is_enabled(ofnode node)
 232 {
 233         if (ofnode_is_np(node)) {
 234                 return of_device_is_available(ofnode_to_np(node));
 235         } else {
 236                 return fdtdec_get_is_enabled(gd->fdt_blob,
 237                                              ofnode_to_offset(node));
 238         }
 239 }
 240
 241 ofnode ofnode_first_subnode(ofnode node)
 242 {
 243         assert(ofnode_valid(node));
 244         if (ofnode_is_np(node))
 245                 return np_to_ofnode(node.np->child);
 246
 247         return offset_to_ofnode(
 248                 fdt_first_subnode(gd->fdt_blob, ofnode_to_offset(node)));
 249 }
 250
 251 ofnode ofnode_next_subnode(ofnode node)
 252 {
 253         assert(ofnode_valid(node));
 254         if (ofnode_is_np(node))
 255                 return np_to_ofnode(node.np->sibling);
 256
 257         return offset_to_ofnode(
 258                 fdt_next_subnode(gd->fdt_blob, ofnode_to_offset(node)));
 259 }
 260 #endif /* !DM_INLINE_OFNODE */
 261
 262 ofnode ofnode_get_parent(ofnode node)
 263 {
 264         ofnode parent;
 265
 266         assert(ofnode_valid(node));
 267         if (ofnode_is_np(node))
 268                 parent = np_to_ofnode(of_get_parent(ofnode_to_np(node)));
 269         else
 270                 parent.of_offset = fdt_parent_offset(gd->fdt_blob,
 271                                                      ofnode_to_offset(node));
 272
 273         return parent;
 274 }
 275
 276 const char *ofnode_get_name(ofnode node)
 277 {
 278         if (!ofnode_valid(node)) {
 279                 debug("%s node not valid\n", __func__);
 280                 return NULL;
 281         }
 282
 283         if (ofnode_is_np(node))
 284                 return strrchr(node.np->full_name, '/') + 1;
 285
 286         return fdt_get_name(gd->fdt_blob, ofnode_to_offset(node), NULL);
 287 }
 288
 289 ofnode ofnode_get_by_phandle(uint phandle)
 290 {
 291         ofnode node;
 292
 293         if (of_live_active())
 294                 node = np_to_ofnode(of_find_node_by_phandle(phandle));
 295         else
 296                 node.of_offset = fdt_node_offset_by_phandle(gd->fdt_blob,
 297                                                             phandle);
 298
 299         return node;
 300 }
 301
 302 fdt_addr_t ofnode_get_addr_size_index(ofnode node, int index, fdt_size_t *size)
 303 {
 304         int na, ns;
 305
 306         *size = FDT_SIZE_T_NONE;
 307
 308         if (ofnode_is_np(node)) {
 309                 const __be32 *prop_val;
 310                 u64 size64;
 311                 uint flags;
 312
 313                 prop_val = of_get_address(ofnode_to_np(node), index, &size64,
 314                                           &flags);
 315                 if (!prop_val)
 316                         return FDT_ADDR_T_NONE;
 317                 if (size)
 318                         *size = size64;
 319
 320                 ns = of_n_size_cells(ofnode_to_np(node));
 321
 322                 if (IS_ENABLED(CONFIG_OF_TRANSLATE) && ns > 0) {
 323                         return of_translate_address(ofnode_to_np(node), prop_val);
 324                 } else {
 325                         na = of_n_addr_cells(ofnode_to_np(node));
 326                         return of_read_number(prop_val, na);
 327                 }
 328         } else {
 329                 na = ofnode_read_simple_addr_cells(ofnode_get_parent(node));
 330                 ns = ofnode_read_simple_size_cells(ofnode_get_parent(node));
 331                 return fdtdec_get_addr_size_fixed(gd->fdt_blob,
 332                                                   ofnode_to_offset(node), "reg",
 333                                                   index, na, ns, size, true);
 334         }
 335
 336         return FDT_ADDR_T_NONE;
 337 }
 338
 339 fdt_addr_t ofnode_get_addr_index(ofnode node, int index)
 340 {
 341         fdt_size_t size;
 342
 343         return ofnode_get_addr_size_index(node, index, &size);
 344 }
 345
 346 fdt_addr_t ofnode_get_addr(ofnode node)
 347 {
 348         return ofnode_get_addr_index(node, 0);
 349 }
 350
 351 fdt_size_t ofnode_get_size(ofnode node)
 352 {
 353         fdt_size_t size;
 354
 355         ofnode_get_addr_size_index(node, 0, &size);
 356
 357         return size;
 358 }
 359
 360 int ofnode_stringlist_search(ofnode node, const char *property,
 361                              const char *string)
 362 {
 363         if (ofnode_is_np(node)) {
 364                 return of_property_match_string(ofnode_to_np(node),
 365                                                 property, string);
 366         } else {
 367                 int ret;
 368
 369                 ret = fdt_stringlist_search(gd->fdt_blob,
 370                                             ofnode_to_offset(node), property,
 371                                             string);
 372                 if (ret == -FDT_ERR_NOTFOUND)
 373                         return -ENODATA;
 374                 else if (ret < 0)
 375                         return -EINVAL;
 376
 377                 return ret;
 378         }
 379 }
 380
 381 int ofnode_read_string_index(ofnode node, const char *property, int index,
 382                              const char **outp)
 383 {
 384         if (ofnode_is_np(node)) {
 385                 return of_property_read_string_index(ofnode_to_np(node),
 386                                                      property, index, outp);
 387         } else {
 388                 int len;
 389
 390                 *outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node),
 391                                            property, index, &len);
 392                 if (len < 0)
 393                         return -EINVAL;
 394                 return 0;
 395         }
 396 }
 397
 398 int ofnode_read_string_count(ofnode node, const char *property)
 399 {
 400         if (ofnode_is_np(node)) {
 401                 return of_property_count_strings(ofnode_to_np(node), property);
 402         } else {
 403                 return fdt_stringlist_count(gd->fdt_blob,
 404                                             ofnode_to_offset(node), property);
 405         }
 406 }
 407
 408 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in,
 409                                             struct ofnode_phandle_args *out)
 410 {
 411         assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
 412         out->node = offset_to_ofnode(in->node);
 413         out->args_count = in->args_count;
 414         memcpy(out->args, in->args, sizeof(out->args));
 415 }
 416
 417 static void ofnode_from_of_phandle_args(struct of_phandle_args *in,
 418                                         struct ofnode_phandle_args *out)
 419 {
 420         assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
 421         out->node = np_to_ofnode(in->np);
 422         out->args_count = in->args_count;
 423         memcpy(out->args, in->args, sizeof(out->args));
 424 }
 425
 426 int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
 427                                    const char *cells_name, int cell_count,
 428                                    int index,
 429                                    struct ofnode_phandle_args *out_args)
 430 {
 431         if (ofnode_is_np(node)) {
 432                 struct of_phandle_args args;
 433                 int ret;
 434
 435                 ret = of_parse_phandle_with_args(ofnode_to_np(node),
 436                                                  list_name, cells_name,
 437                                                  cell_count, index,
 438                                                  &args);
 439                 if (ret)
 440                         return ret;
 441                 ofnode_from_of_phandle_args(&args, out_args);
 442         } else {
 443                 struct fdtdec_phandle_args args;
 444                 int ret;
 445
 446                 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob,
 447                                                      ofnode_to_offset(node),
 448                                                      list_name, cells_name,
 449                                                      cell_count, index, &args);
 450                 if (ret)
 451                         return ret;
 452                 ofnode_from_fdtdec_phandle_args(&args, out_args);
 453         }
 454
 455         return 0;
 456 }
 457
 458 int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
 459                                    const char *cells_name, int cell_count)
 460 {
 461         if (ofnode_is_np(node))
 462                 return of_count_phandle_with_args(ofnode_to_np(node),
 463                                 list_name, cells_name, cell_count);
 464         else
 465                 return fdtdec_parse_phandle_with_args(gd->fdt_blob,
 466                                 ofnode_to_offset(node), list_name, cells_name,
 467                                 cell_count, -1, NULL);
 468 }
 469
 470 ofnode ofnode_path(const char *path)
 471 {
 472         if (of_live_active())
 473                 return np_to_ofnode(of_find_node_by_path(path));
 474         else
 475                 return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path));
 476 }
 477
 478 const void *ofnode_read_chosen_prop(const char *propname, int *sizep)
 479 {
 480         ofnode chosen_node;
 481
 482         chosen_node = ofnode_path("/chosen");
 483
 484         return ofnode_read_prop(chosen_node, propname, sizep);
 485 }
 486
 487 const char *ofnode_read_chosen_string(const char *propname)
 488 {
 489         return ofnode_read_chosen_prop(propname, NULL);
 490 }
 491
 492 ofnode ofnode_get_chosen_node(const char *name)
 493 {
 494         const char *prop;
 495
 496         prop = ofnode_read_chosen_prop(name, NULL);
 497         if (!prop)
 498                 return ofnode_null();
 499
 500         return ofnode_path(prop);
 501 }
 502
 503 const void *ofnode_read_aliases_prop(const char *propname, int *sizep)
 504 {
 505         ofnode node;
 506
 507         node = ofnode_path("/aliases");
 508
 509         return ofnode_read_prop(node, propname, sizep);
 510 }
 511
 512 ofnode ofnode_get_aliases_node(const char *name)
 513 {
 514         const char *prop;
 515
 516         prop = ofnode_read_aliases_prop(name, NULL);
 517         if (!prop)
 518                 return ofnode_null();
 519
 520         debug("%s: node_path: %s\n", __func__, prop);
 521
 522         return ofnode_path(prop);
 523 }
 524
 525 int ofnode_get_child_count(ofnode parent)
 526 {
 527         ofnode child;
 528         int num = 0;
 529
 530         ofnode_for_each_subnode(child, parent)
 531                 num++;
 532
 533         return num;
 534 }
 535
 536 static int decode_timing_property(ofnode node, const char *name,
 537                                   struct timing_entry *result)
 538 {
 539         int length, ret = 0;
 540
 541         length = ofnode_read_size(node, name);
 542         if (length < 0) {
 543                 debug("%s: could not find property %s\n",
 544                       ofnode_get_name(node), name);
 545                 return length;
 546         }
 547
 548         if (length == sizeof(u32)) {
 549                 result->typ = ofnode_read_u32_default(node, name, 0);
 550                 result->min = result->typ;
 551                 result->max = result->typ;
 552         } else {
 553                 ret = ofnode_read_u32_array(node, name, &result->min, 3);
 554         }
 555
 556         return ret;
 557 }
 558
 559 int ofnode_decode_display_timing(ofnode parent, int index,
 560                                  struct display_timing *dt)
 561 {
 562         int i;
 563         ofnode timings, node;
 564         u32 val = 0;
 565         int ret = 0;
 566
 567         timings = ofnode_find_subnode(parent, "display-timings");
 568         if (!ofnode_valid(timings))
 569                 return -EINVAL;
 570
 571         i = 0;
 572         ofnode_for_each_subnode(node, timings) {
 573                 if (i++ == index)
 574                         break;
 575         }
 576
 577         if (!ofnode_valid(node))
 578                 return -EINVAL;
 579
 580         memset(dt, 0, sizeof(*dt));
 581
 582         ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch);
 583         ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch);
 584         ret |= decode_timing_property(node, "hactive", &dt->hactive);
 585         ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len);
 586         ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch);
 587         ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch);
 588         ret |= decode_timing_property(node, "vactive", &dt->vactive);
 589         ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len);
 590         ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock);
 591
 592         dt->flags = 0;
 593         val = ofnode_read_u32_default(node, "vsync-active", -1);
 594         if (val != -1) {
 595                 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
 596                                 DISPLAY_FLAGS_VSYNC_LOW;
 597         }
 598         val = ofnode_read_u32_default(node, "hsync-active", -1);
 599         if (val != -1) {
 600                 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
 601                                 DISPLAY_FLAGS_HSYNC_LOW;
 602         }
 603         val = ofnode_read_u32_default(node, "de-active", -1);
 604         if (val != -1) {
 605                 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
 606                                 DISPLAY_FLAGS_DE_LOW;
 607         }
 608         val = ofnode_read_u32_default(node, "pixelclk-active", -1);
 609         if (val != -1) {
 610                 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
 611                                 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
 612         }
 613
 614         if (ofnode_read_bool(node, "interlaced"))
 615                 dt->flags |= DISPLAY_FLAGS_INTERLACED;
 616         if (ofnode_read_bool(node, "doublescan"))
 617                 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
 618         if (ofnode_read_bool(node, "doubleclk"))
 619                 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
 620
 621         return ret;
 622 }
 623
 624 const void *ofnode_get_property(ofnode node, const char *propname, int *lenp)
 625 {
 626         if (ofnode_is_np(node))
 627                 return of_get_property(ofnode_to_np(node), propname, lenp);
 628         else
 629                 return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
 630                                    propname, lenp);
 631 }
 632
 633 int ofnode_get_first_property(ofnode node, struct ofprop *prop)
 634 {
 635         prop->node = node;
 636
 637         if (ofnode_is_np(node)) {
 638                 prop->prop = of_get_first_property(ofnode_to_np(prop->node));
 639                 if (!prop->prop)
 640                         return -FDT_ERR_NOTFOUND;
 641         } else {
 642                 prop->offset =
 643                         fdt_first_property_offset(gd->fdt_blob,
 644                                                   ofnode_to_offset(prop->node));
 645                 if (prop->offset < 0)
 646                         return prop->offset;
 647         }
 648
 649         return 0;
 650 }
 651
 652 int ofnode_get_next_property(struct ofprop *prop)
 653 {
 654         if (ofnode_is_np(prop->node)) {
 655                 prop->prop = of_get_next_property(ofnode_to_np(prop->node),
 656                                                   prop->prop);
 657                 if (!prop->prop)
 658                         return -FDT_ERR_NOTFOUND;
 659         } else {
 660                 prop->offset = fdt_next_property_offset(gd->fdt_blob,
 661                                                         prop->offset);
 662                 if (prop->offset  < 0)
 663                         return prop->offset;
 664         }
 665
 666         return 0;
 667 }
 668
 669 const void *ofnode_get_property_by_prop(const struct ofprop *prop,
 670                                         const char **propname, int *lenp)
 671 {
 672         if (ofnode_is_np(prop->node))
 673                 return of_get_property_by_prop(ofnode_to_np(prop->node),
 674                                                prop->prop, propname, lenp);
 675         else
 676                 return fdt_getprop_by_offset(gd->fdt_blob,
 677                                              prop->offset,
 678                                              propname, lenp);
 679 }
 680
 681 bool ofnode_is_available(ofnode node)
 682 {
 683         if (ofnode_is_np(node))
 684                 return of_device_is_available(ofnode_to_np(node));
 685         else
 686                 return fdtdec_get_is_enabled(gd->fdt_blob,
 687                                              ofnode_to_offset(node));
 688 }
 689
 690 fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property,
 691                                 fdt_size_t *sizep)
 692 {
 693         if (ofnode_is_np(node)) {
 694                 int na, ns;
 695                 int psize;
 696                 const struct device_node *np = ofnode_to_np(node);
 697                 const __be32 *prop = of_get_property(np, property, &psize);
 698
 699                 if (!prop)
 700                         return FDT_ADDR_T_NONE;
 701                 na = of_n_addr_cells(np);
 702                 ns = of_n_size_cells(np);
 703                 *sizep = of_read_number(prop + na, ns);
 704
 705                 if (CONFIG_IS_ENABLED(OF_TRANSLATE) && ns > 0)
 706                         return of_translate_address(np, prop);
 707                 else
 708                         return of_read_number(prop, na);
 709         } else {
 710                 return fdtdec_get_addr_size(gd->fdt_blob,
 711                                             ofnode_to_offset(node), property,
 712                                             sizep);
 713         }
 714 }
 715
 716 const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
 717                                         size_t sz)
 718 {
 719         if (ofnode_is_np(node)) {
 720                 const struct device_node *np = ofnode_to_np(node);
 721                 int psize;
 722                 const __be32 *prop = of_get_property(np, propname, &psize);
 723
 724                 if (!prop || sz != psize)
 725                         return NULL;
 726                 return (uint8_t *)prop;
 727
 728         } else {
 729                 return fdtdec_locate_byte_array(gd->fdt_blob,
 730                                 ofnode_to_offset(node), propname, sz);
 731         }
 732 }
 733
 734 int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
 735                          const char *propname, struct fdt_pci_addr *addr)
 736 {
 737         const fdt32_t *cell;
 738         int len;
 739         int ret = -ENOENT;
 740
 741         debug("%s: %s: ", __func__, propname);
 742
 743         /*
 744          * If we follow the pci bus bindings strictly, we should check
 745          * the value of the node's parent node's #address-cells and
 746          * #size-cells. They need to be 3 and 2 accordingly. However,
 747          * for simplicity we skip the check here.
 748          */
 749         cell = ofnode_get_property(node, propname, &len);
 750         if (!cell)
 751                 goto fail;
 752
 753         if ((len % FDT_PCI_REG_SIZE) == 0) {
 754                 int num = len / FDT_PCI_REG_SIZE;
 755                 int i;
 756
 757                 for (i = 0; i < num; i++) {
 758                         debug("pci address #%d: %08lx %08lx %08lx\n", i,
 759                               (ulong)fdt32_to_cpu(cell[0]),
 760                               (ulong)fdt32_to_cpu(cell[1]),
 761                               (ulong)fdt32_to_cpu(cell[2]));
 762                         if ((fdt32_to_cpu(*cell) & type) == type) {
 763                                 addr->phys_hi = fdt32_to_cpu(cell[0]);
 764                                 addr->phys_mid = fdt32_to_cpu(cell[1]);
 765                                 addr->phys_lo = fdt32_to_cpu(cell[2]);
 766                                 break;
 767                         }
 768
 769                         cell += (FDT_PCI_ADDR_CELLS +
 770                                  FDT_PCI_SIZE_CELLS);
 771                 }
 772
 773                 if (i == num) {
 774                         ret = -ENXIO;
 775                         goto fail;
 776                 }
 777
 778                 return 0;
 779         }
 780
 781         ret = -EINVAL;
 782
 783 fail:
 784         debug("(not found)\n");
 785         return ret;
 786 }
 787
 788 int ofnode_read_pci_vendev(ofnode node, u16 *vendor, u16 *device)
 789 {
 790         const char *list, *end;
 791         int len;
 792
 793         list = ofnode_get_property(node, "compatible", &len);
 794         if (!list)
 795                 return -ENOENT;
 796
 797         end = list + len;
 798         while (list < end) {
 799                 len = strlen(list);
 800                 if (len >= strlen("pciVVVV,DDDD")) {
 801                         char *s = strstr(list, "pci");
 802
 803                         /*
 804                          * check if the string is something like pciVVVV,DDDD.RR
 805                          * or just pciVVVV,DDDD
 806                          */
 807                         if (s && s[7] == ',' &&
 808                             (s[12] == '.' || s[12] == 0)) {
 809                                 s += 3;
 810                                 *vendor = simple_strtol(s, NULL, 16);
 811
 812                                 s += 5;
 813                                 *device = simple_strtol(s, NULL, 16);
 814
 815                                 return 0;
 816                         }
 817                 }
 818                 list += (len + 1);
 819         }
 820
 821         return -ENOENT;
 822 }
 823
 824 int ofnode_read_addr_cells(ofnode node)
 825 {
 826         if (ofnode_is_np(node)) {
 827                 return of_n_addr_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_address_cells(gd->fdt_blob, parent);
 833         }
 834 }
 835
 836 int ofnode_read_size_cells(ofnode node)
 837 {
 838         if (ofnode_is_np(node)) {
 839                 return of_n_size_cells(ofnode_to_np(node));
 840         } else {
 841                 int parent = fdt_parent_offset(gd->fdt_blob,
 842                                                ofnode_to_offset(node));
 843
 844                 return fdt_size_cells(gd->fdt_blob, parent);
 845         }
 846 }
 847
 848 int ofnode_read_simple_addr_cells(ofnode node)
 849 {
 850         if (ofnode_is_np(node))
 851                 return of_simple_addr_cells(ofnode_to_np(node));
 852         else
 853                 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
 854 }
 855
 856 int ofnode_read_simple_size_cells(ofnode node)
 857 {
 858         if (ofnode_is_np(node))
 859                 return of_simple_size_cells(ofnode_to_np(node));
 860         else
 861                 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
 862 }
 863
 864 bool ofnode_pre_reloc(ofnode node)
 865 {
 866 #if defined(CONFIG_SPL_BUILD) || defined(CONFIG_TPL_BUILD)
 867         /* for SPL and TPL the remaining nodes after the fdtgrep 1st pass
 868          * had property dm-pre-reloc or u-boot,dm-spl/tpl.
 869          * They are removed in final dtb (fdtgrep 2nd pass)
 870          */
 871         return true;
 872 #else
 873         if (ofnode_read_bool(node, "u-boot,dm-pre-reloc"))
 874                 return true;
 875         if (ofnode_read_bool(node, "u-boot,dm-pre-proper"))
 876                 return true;
 877
 878         /*
 879          * In regular builds individual spl and tpl handling both
 880          * count as handled pre-relocation for later second init.
 881          */
 882         if (ofnode_read_bool(node, "u-boot,dm-spl") ||
 883             ofnode_read_bool(node, "u-boot,dm-tpl"))
 884                 return true;
 885
 886         return false;
 887 #endif
 888 }
 889
 890 int ofnode_read_resource(ofnode node, uint index, struct resource *res)
 891 {
 892         if (ofnode_is_np(node)) {
 893                 return of_address_to_resource(ofnode_to_np(node), index, res);
 894         } else {
 895                 struct fdt_resource fres;
 896                 int ret;
 897
 898                 ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node),
 899                                        "reg", index, &fres);
 900                 if (ret < 0)
 901                         return -EINVAL;
 902                 memset(res, '\0', sizeof(*res));
 903                 res->start = fres.start;
 904                 res->end = fres.end;
 905
 906                 return 0;
 907         }
 908 }
 909
 910 int ofnode_read_resource_byname(ofnode node, const char *name,
 911                                 struct resource *res)
 912 {
 913         int index;
 914
 915         index = ofnode_stringlist_search(node, "reg-names", name);
 916         if (index < 0)
 917                 return index;
 918
 919         return ofnode_read_resource(node, index, res);
 920 }
 921
 922 u64 ofnode_translate_address(ofnode node, const fdt32_t *in_addr)
 923 {
 924         if (ofnode_is_np(node))
 925                 return of_translate_address(ofnode_to_np(node), in_addr);
 926         else
 927                 return fdt_translate_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
 928 }
 929
 930 u64 ofnode_translate_dma_address(ofnode node, const fdt32_t *in_addr)
 931 {
 932         if (ofnode_is_np(node))
 933                 return of_translate_dma_address(ofnode_to_np(node), in_addr);
 934         else
 935                 return fdt_translate_dma_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
 936 }
 937
 938 int ofnode_get_dma_range(ofnode node, phys_addr_t *cpu, dma_addr_t *bus, u64 *size)
 939 {
 940         if (ofnode_is_np(node))
 941                 return of_get_dma_range(ofnode_to_np(node), cpu, bus, size);
 942         else
 943                 return fdt_get_dma_range(gd->fdt_blob, ofnode_to_offset(node),
 944                                          cpu, bus, size);
 945 }
 946
 947 int ofnode_device_is_compatible(ofnode node, const char *compat)
 948 {
 949         if (ofnode_is_np(node))
 950                 return of_device_is_compatible(ofnode_to_np(node), compat,
 951                                                NULL, NULL);
 952         else
 953                 return !fdt_node_check_compatible(gd->fdt_blob,
 954                                                   ofnode_to_offset(node),
 955                                                   compat);
 956 }
 957
 958 ofnode ofnode_by_compatible(ofnode from, const char *compat)
 959 {
 960         if (of_live_active()) {
 961                 return np_to_ofnode(of_find_compatible_node(
 962                         (struct device_node *)ofnode_to_np(from), NULL,
 963                         compat));
 964         } else {
 965                 return offset_to_ofnode(fdt_node_offset_by_compatible(
 966                                 gd->fdt_blob, ofnode_to_offset(from), compat));
 967         }
 968 }
 969
 970 ofnode ofnode_by_prop_value(ofnode from, const char *propname,
 971                             const void *propval, int proplen)
 972 {
 973         if (of_live_active()) {
 974                 return np_to_ofnode(of_find_node_by_prop_value(
 975                         (struct device_node *)ofnode_to_np(from), propname,
 976                         propval, proplen));
 977         } else {
 978                 return offset_to_ofnode(fdt_node_offset_by_prop_value(
 979                                 gd->fdt_blob, ofnode_to_offset(from),
 980                                 propname, propval, proplen));
 981         }
 982 }
 983
 984 int ofnode_write_prop(ofnode node, const char *propname, int len,
 985                       const void *value)
 986 {
 987         const struct device_node *np = ofnode_to_np(node);
 988         struct property *pp;
 989         struct property *pp_last = NULL;
 990         struct property *new;
 991
 992         if (!of_live_active())
 993                 return -ENOSYS;
 994
 995         if (!np)
 996                 return -EINVAL;
 997
 998         for (pp = np->properties; pp; pp = pp->next) {
 999                 if (strcmp(pp->name, propname) == 0) {
1000                         /* Property exists -> change value */
1001                         pp->value = (void *)value;
1002                         pp->length = len;
1003                         return 0;
1004                 }
1005                 pp_last = pp;
1006         }
1007
1008         if (!pp_last)
1009                 return -ENOENT;
1010
1011         /* Property does not exist -> append new property */
1012         new = malloc(sizeof(struct property));
1013         if (!new)
1014                 return -ENOMEM;
1015
1016         new->name = strdup(propname);
1017         if (!new->name) {
1018                 free(new);
1019                 return -ENOMEM;
1020         }
1021
1022         new->value = (void *)value;
1023         new->length = len;
1024         new->next = NULL;
1025
1026         pp_last->next = new;
1027
1028         return 0;
1029 }
1030
1031 int ofnode_write_string(ofnode node, const char *propname, const char *value)
1032 {
1033         if (!of_live_active())
1034                 return -ENOSYS;
1035
1036         assert(ofnode_valid(node));
1037
1038         debug("%s: %s = %s", __func__, propname, value);
1039
1040         return ofnode_write_prop(node, propname, strlen(value) + 1, value);
1041 }
1042
1043 int ofnode_set_enabled(ofnode node, bool value)
1044 {
1045         if (!of_live_active())
1046                 return -ENOSYS;
1047
1048         assert(ofnode_valid(node));
1049
1050         if (value)
1051                 return ofnode_write_string(node, "status", "okay");
1052         else
1053                 return ofnode_write_string(node, "status", "disabled");
1054 }