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         if (ofnode_is_np(node)) {
 307                 const __be32 *prop_val;
 308                 u64 size64;
 309                 uint flags;
 310
 311                 prop_val = of_get_address(ofnode_to_np(node), index, &size64,
 312                                           &flags);
 313                 if (!prop_val)
 314                         return FDT_ADDR_T_NONE;
 315                 if (size)
 316                         *size = size64;
 317
 318                 ns = of_n_size_cells(ofnode_to_np(node));
 319
 320                 if (IS_ENABLED(CONFIG_OF_TRANSLATE) &&
 321                     (ns > 0 || gd_size_cells_0())) {
 322                         return of_translate_address(ofnode_to_np(node), prop_val);
 323                 } else {
 324                         na = of_n_addr_cells(ofnode_to_np(node));
 325                         return of_read_number(prop_val, na);
 326                 }
 327         } else {
 328                 na = ofnode_read_simple_addr_cells(ofnode_get_parent(node));
 329                 ns = ofnode_read_simple_size_cells(ofnode_get_parent(node));
 330                 return fdtdec_get_addr_size_fixed(gd->fdt_blob,
 331                                                   ofnode_to_offset(node), "reg",
 332                                                   index, na, ns, size, true);
 333         }
 334
 335         return FDT_ADDR_T_NONE;
 336 }
 337
 338 fdt_addr_t ofnode_get_addr_index(ofnode node, int index)
 339 {
 340         fdt_size_t size;
 341
 342         return ofnode_get_addr_size_index(node, index, &size);
 343 }
 344
 345 fdt_addr_t ofnode_get_addr(ofnode node)
 346 {
 347         return ofnode_get_addr_index(node, 0);
 348 }
 349
 350 int ofnode_stringlist_search(ofnode node, const char *property,
 351                              const char *string)
 352 {
 353         if (ofnode_is_np(node)) {
 354                 return of_property_match_string(ofnode_to_np(node),
 355                                                 property, string);
 356         } else {
 357                 int ret;
 358
 359                 ret = fdt_stringlist_search(gd->fdt_blob,
 360                                             ofnode_to_offset(node), property,
 361                                             string);
 362                 if (ret == -FDT_ERR_NOTFOUND)
 363                         return -ENODATA;
 364                 else if (ret < 0)
 365                         return -EINVAL;
 366
 367                 return ret;
 368         }
 369 }
 370
 371 int ofnode_read_string_index(ofnode node, const char *property, int index,
 372                              const char **outp)
 373 {
 374         if (ofnode_is_np(node)) {
 375                 return of_property_read_string_index(ofnode_to_np(node),
 376                                                      property, index, outp);
 377         } else {
 378                 int len;
 379
 380                 *outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node),
 381                                            property, index, &len);
 382                 if (len < 0)
 383                         return -EINVAL;
 384                 return 0;
 385         }
 386 }
 387
 388 int ofnode_read_string_count(ofnode node, const char *property)
 389 {
 390         if (ofnode_is_np(node)) {
 391                 return of_property_count_strings(ofnode_to_np(node), property);
 392         } else {
 393                 return fdt_stringlist_count(gd->fdt_blob,
 394                                             ofnode_to_offset(node), property);
 395         }
 396 }
 397
 398 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in,
 399                                             struct ofnode_phandle_args *out)
 400 {
 401         assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
 402         out->node = offset_to_ofnode(in->node);
 403         out->args_count = in->args_count;
 404         memcpy(out->args, in->args, sizeof(out->args));
 405 }
 406
 407 static void ofnode_from_of_phandle_args(struct of_phandle_args *in,
 408                                         struct ofnode_phandle_args *out)
 409 {
 410         assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
 411         out->node = np_to_ofnode(in->np);
 412         out->args_count = in->args_count;
 413         memcpy(out->args, in->args, sizeof(out->args));
 414 }
 415
 416 int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
 417                                    const char *cells_name, int cell_count,
 418                                    int index,
 419                                    struct ofnode_phandle_args *out_args)
 420 {
 421         if (ofnode_is_np(node)) {
 422                 struct of_phandle_args args;
 423                 int ret;
 424
 425                 ret = of_parse_phandle_with_args(ofnode_to_np(node),
 426                                                  list_name, cells_name,
 427                                                  cell_count, index,
 428                                                  &args);
 429                 if (ret)
 430                         return ret;
 431                 ofnode_from_of_phandle_args(&args, out_args);
 432         } else {
 433                 struct fdtdec_phandle_args args;
 434                 int ret;
 435
 436                 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob,
 437                                                      ofnode_to_offset(node),
 438                                                      list_name, cells_name,
 439                                                      cell_count, index, &args);
 440                 if (ret)
 441                         return ret;
 442                 ofnode_from_fdtdec_phandle_args(&args, out_args);
 443         }
 444
 445         return 0;
 446 }
 447
 448 int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
 449                                    const char *cells_name, int cell_count)
 450 {
 451         if (ofnode_is_np(node))
 452                 return of_count_phandle_with_args(ofnode_to_np(node),
 453                                 list_name, cells_name, cell_count);
 454         else
 455                 return fdtdec_parse_phandle_with_args(gd->fdt_blob,
 456                                 ofnode_to_offset(node), list_name, cells_name,
 457                                 cell_count, -1, NULL);
 458 }
 459
 460 ofnode ofnode_path(const char *path)
 461 {
 462         if (of_live_active())
 463                 return np_to_ofnode(of_find_node_by_path(path));
 464         else
 465                 return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path));
 466 }
 467
 468 const void *ofnode_read_chosen_prop(const char *propname, int *sizep)
 469 {
 470         ofnode chosen_node;
 471
 472         chosen_node = ofnode_path("/chosen");
 473
 474         return ofnode_read_prop(chosen_node, propname, sizep);
 475 }
 476
 477 const char *ofnode_read_chosen_string(const char *propname)
 478 {
 479         return ofnode_read_chosen_prop(propname, NULL);
 480 }
 481
 482 ofnode ofnode_get_chosen_node(const char *name)
 483 {
 484         const char *prop;
 485
 486         prop = ofnode_read_chosen_prop(name, NULL);
 487         if (!prop)
 488                 return ofnode_null();
 489
 490         return ofnode_path(prop);
 491 }
 492
 493 const void *ofnode_read_aliases_prop(const char *propname, int *sizep)
 494 {
 495         ofnode node;
 496
 497         node = ofnode_path("/aliases");
 498
 499         return ofnode_read_prop(node, propname, sizep);
 500 }
 501
 502 ofnode ofnode_get_aliases_node(const char *name)
 503 {
 504         const char *prop;
 505
 506         prop = ofnode_read_aliases_prop(name, NULL);
 507         if (!prop)
 508                 return ofnode_null();
 509
 510         debug("%s: node_path: %s\n", __func__, prop);
 511
 512         return ofnode_path(prop);
 513 }
 514
 515 int ofnode_get_child_count(ofnode parent)
 516 {
 517         ofnode child;
 518         int num = 0;
 519
 520         ofnode_for_each_subnode(child, parent)
 521                 num++;
 522
 523         return num;
 524 }
 525
 526 static int decode_timing_property(ofnode node, const char *name,
 527                                   struct timing_entry *result)
 528 {
 529         int length, ret = 0;
 530
 531         length = ofnode_read_size(node, name);
 532         if (length < 0) {
 533                 debug("%s: could not find property %s\n",
 534                       ofnode_get_name(node), name);
 535                 return length;
 536         }
 537
 538         if (length == sizeof(u32)) {
 539                 result->typ = ofnode_read_u32_default(node, name, 0);
 540                 result->min = result->typ;
 541                 result->max = result->typ;
 542         } else {
 543                 ret = ofnode_read_u32_array(node, name, &result->min, 3);
 544         }
 545
 546         return ret;
 547 }
 548
 549 int ofnode_decode_display_timing(ofnode parent, int index,
 550                                  struct display_timing *dt)
 551 {
 552         int i;
 553         ofnode timings, node;
 554         u32 val = 0;
 555         int ret = 0;
 556
 557         timings = ofnode_find_subnode(parent, "display-timings");
 558         if (!ofnode_valid(timings))
 559                 return -EINVAL;
 560
 561         i = 0;
 562         ofnode_for_each_subnode(node, timings) {
 563                 if (i++ == index)
 564                         break;
 565         }
 566
 567         if (!ofnode_valid(node))
 568                 return -EINVAL;
 569
 570         memset(dt, 0, sizeof(*dt));
 571
 572         ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch);
 573         ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch);
 574         ret |= decode_timing_property(node, "hactive", &dt->hactive);
 575         ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len);
 576         ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch);
 577         ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch);
 578         ret |= decode_timing_property(node, "vactive", &dt->vactive);
 579         ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len);
 580         ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock);
 581
 582         dt->flags = 0;
 583         val = ofnode_read_u32_default(node, "vsync-active", -1);
 584         if (val != -1) {
 585                 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
 586                                 DISPLAY_FLAGS_VSYNC_LOW;
 587         }
 588         val = ofnode_read_u32_default(node, "hsync-active", -1);
 589         if (val != -1) {
 590                 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
 591                                 DISPLAY_FLAGS_HSYNC_LOW;
 592         }
 593         val = ofnode_read_u32_default(node, "de-active", -1);
 594         if (val != -1) {
 595                 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
 596                                 DISPLAY_FLAGS_DE_LOW;
 597         }
 598         val = ofnode_read_u32_default(node, "pixelclk-active", -1);
 599         if (val != -1) {
 600                 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
 601                                 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
 602         }
 603
 604         if (ofnode_read_bool(node, "interlaced"))
 605                 dt->flags |= DISPLAY_FLAGS_INTERLACED;
 606         if (ofnode_read_bool(node, "doublescan"))
 607                 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
 608         if (ofnode_read_bool(node, "doubleclk"))
 609                 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
 610
 611         return ret;
 612 }
 613
 614 const void *ofnode_get_property(ofnode node, const char *propname, int *lenp)
 615 {
 616         if (ofnode_is_np(node))
 617                 return of_get_property(ofnode_to_np(node), propname, lenp);
 618         else
 619                 return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
 620                                    propname, lenp);
 621 }
 622
 623 int ofnode_get_first_property(ofnode node, struct ofprop *prop)
 624 {
 625         prop->node = node;
 626
 627         if (ofnode_is_np(node)) {
 628                 prop->prop = of_get_first_property(ofnode_to_np(prop->node));
 629                 if (!prop->prop)
 630                         return -FDT_ERR_NOTFOUND;
 631         } else {
 632                 prop->offset =
 633                         fdt_first_property_offset(gd->fdt_blob,
 634                                                   ofnode_to_offset(prop->node));
 635                 if (prop->offset < 0)
 636                         return prop->offset;
 637         }
 638
 639         return 0;
 640 }
 641
 642 int ofnode_get_next_property(struct ofprop *prop)
 643 {
 644         if (ofnode_is_np(prop->node)) {
 645                 prop->prop = of_get_next_property(ofnode_to_np(prop->node),
 646                                                   prop->prop);
 647                 if (!prop->prop)
 648                         return -FDT_ERR_NOTFOUND;
 649         } else {
 650                 prop->offset = fdt_next_property_offset(gd->fdt_blob,
 651                                                         prop->offset);
 652                 if (prop->offset  < 0)
 653                         return prop->offset;
 654         }
 655
 656         return 0;
 657 }
 658
 659 const void *ofnode_get_property_by_prop(const struct ofprop *prop,
 660                                         const char **propname, int *lenp)
 661 {
 662         if (ofnode_is_np(prop->node))
 663                 return of_get_property_by_prop(ofnode_to_np(prop->node),
 664                                                prop->prop, propname, lenp);
 665         else
 666                 return fdt_getprop_by_offset(gd->fdt_blob,
 667                                              prop->offset,
 668                                              propname, lenp);
 669 }
 670
 671 bool ofnode_is_available(ofnode node)
 672 {
 673         if (ofnode_is_np(node))
 674                 return of_device_is_available(ofnode_to_np(node));
 675         else
 676                 return fdtdec_get_is_enabled(gd->fdt_blob,
 677                                              ofnode_to_offset(node));
 678 }
 679
 680 fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property,
 681                                 fdt_size_t *sizep)
 682 {
 683         if (ofnode_is_np(node)) {
 684                 int na, ns;
 685                 int psize;
 686                 const struct device_node *np = ofnode_to_np(node);
 687                 const __be32 *prop = of_get_property(np, property, &psize);
 688
 689                 if (!prop)
 690                         return FDT_ADDR_T_NONE;
 691                 na = of_n_addr_cells(np);
 692                 ns = of_n_size_cells(np);
 693                 *sizep = of_read_number(prop + na, ns);
 694
 695                 if (CONFIG_IS_ENABLED(OF_TRANSLATE) &&
 696                     (ns > 0 || gd_size_cells_0())) {
 697                         return of_translate_address(np, prop);
 698                 }
 699                 else
 700                         return of_read_number(prop, na);
 701         } else {
 702                 return fdtdec_get_addr_size(gd->fdt_blob,
 703                                             ofnode_to_offset(node), property,
 704                                             sizep);
 705         }
 706 }
 707
 708 const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
 709                                         size_t sz)
 710 {
 711         if (ofnode_is_np(node)) {
 712                 const struct device_node *np = ofnode_to_np(node);
 713                 int psize;
 714                 const __be32 *prop = of_get_property(np, propname, &psize);
 715
 716                 if (!prop || sz != psize)
 717                         return NULL;
 718                 return (uint8_t *)prop;
 719
 720         } else {
 721                 return fdtdec_locate_byte_array(gd->fdt_blob,
 722                                 ofnode_to_offset(node), propname, sz);
 723         }
 724 }
 725
 726 int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
 727                          const char *propname, struct fdt_pci_addr *addr)
 728 {
 729         const fdt32_t *cell;
 730         int len;
 731         int ret = -ENOENT;
 732
 733         debug("%s: %s: ", __func__, propname);
 734
 735         /*
 736          * If we follow the pci bus bindings strictly, we should check
 737          * the value of the node's parent node's #address-cells and
 738          * #size-cells. They need to be 3 and 2 accordingly. However,
 739          * for simplicity we skip the check here.
 740          */
 741         cell = ofnode_get_property(node, propname, &len);
 742         if (!cell)
 743                 goto fail;
 744
 745         if ((len % FDT_PCI_REG_SIZE) == 0) {
 746                 int num = len / FDT_PCI_REG_SIZE;
 747                 int i;
 748
 749                 for (i = 0; i < num; i++) {
 750                         debug("pci address #%d: %08lx %08lx %08lx\n", i,
 751                               (ulong)fdt32_to_cpu(cell[0]),
 752                               (ulong)fdt32_to_cpu(cell[1]),
 753                               (ulong)fdt32_to_cpu(cell[2]));
 754                         if ((fdt32_to_cpu(*cell) & type) == type) {
 755                                 addr->phys_hi = fdt32_to_cpu(cell[0]);
 756                                 addr->phys_mid = fdt32_to_cpu(cell[1]);
 757                                 addr->phys_lo = fdt32_to_cpu(cell[2]);
 758                                 break;
 759                         }
 760
 761                         cell += (FDT_PCI_ADDR_CELLS +
 762                                  FDT_PCI_SIZE_CELLS);
 763                 }
 764
 765                 if (i == num) {
 766                         ret = -ENXIO;
 767                         goto fail;
 768                 }
 769
 770                 return 0;
 771         }
 772
 773         ret = -EINVAL;
 774
 775 fail:
 776         debug("(not found)\n");
 777         return ret;
 778 }
 779
 780 int ofnode_read_pci_vendev(ofnode node, u16 *vendor, u16 *device)
 781 {
 782         const char *list, *end;
 783         int len;
 784
 785         list = ofnode_get_property(node, "compatible", &len);
 786         if (!list)
 787                 return -ENOENT;
 788
 789         end = list + len;
 790         while (list < end) {
 791                 len = strlen(list);
 792                 if (len >= strlen("pciVVVV,DDDD")) {
 793                         char *s = strstr(list, "pci");
 794
 795                         /*
 796                          * check if the string is something like pciVVVV,DDDD.RR
 797                          * or just pciVVVV,DDDD
 798                          */
 799                         if (s && s[7] == ',' &&
 800                             (s[12] == '.' || s[12] == 0)) {
 801                                 s += 3;
 802                                 *vendor = simple_strtol(s, NULL, 16);
 803
 804                                 s += 5;
 805                                 *device = simple_strtol(s, NULL, 16);
 806
 807                                 return 0;
 808                         }
 809                 }
 810                 list += (len + 1);
 811         }
 812
 813         return -ENOENT;
 814 }
 815
 816 int ofnode_read_addr_cells(ofnode node)
 817 {
 818         if (ofnode_is_np(node)) {
 819                 return of_n_addr_cells(ofnode_to_np(node));
 820         } else {
 821                 int parent = fdt_parent_offset(gd->fdt_blob,
 822                                                ofnode_to_offset(node));
 823
 824                 return fdt_address_cells(gd->fdt_blob, parent);
 825         }
 826 }
 827
 828 int ofnode_read_size_cells(ofnode node)
 829 {
 830         if (ofnode_is_np(node)) {
 831                 return of_n_size_cells(ofnode_to_np(node));
 832         } else {
 833                 int parent = fdt_parent_offset(gd->fdt_blob,
 834                                                ofnode_to_offset(node));
 835
 836                 return fdt_size_cells(gd->fdt_blob, parent);
 837         }
 838 }
 839
 840 int ofnode_read_simple_addr_cells(ofnode node)
 841 {
 842         if (ofnode_is_np(node))
 843                 return of_simple_addr_cells(ofnode_to_np(node));
 844         else
 845                 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
 846 }
 847
 848 int ofnode_read_simple_size_cells(ofnode node)
 849 {
 850         if (ofnode_is_np(node))
 851                 return of_simple_size_cells(ofnode_to_np(node));
 852         else
 853                 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
 854 }
 855
 856 bool ofnode_pre_reloc(ofnode node)
 857 {
 858 #if defined(CONFIG_SPL_BUILD) || defined(CONFIG_TPL_BUILD)
 859         /* for SPL and TPL the remaining nodes after the fdtgrep 1st pass
 860          * had property dm-pre-reloc or u-boot,dm-spl/tpl.
 861          * They are removed in final dtb (fdtgrep 2nd pass)
 862          */
 863         return true;
 864 #else
 865         if (ofnode_read_bool(node, "u-boot,dm-pre-reloc"))
 866                 return true;
 867         if (ofnode_read_bool(node, "u-boot,dm-pre-proper"))
 868                 return true;
 869
 870         /*
 871          * In regular builds individual spl and tpl handling both
 872          * count as handled pre-relocation for later second init.
 873          */
 874         if (ofnode_read_bool(node, "u-boot,dm-spl") ||
 875             ofnode_read_bool(node, "u-boot,dm-tpl"))
 876                 return true;
 877
 878         return false;
 879 #endif
 880 }
 881
 882 int ofnode_read_resource(ofnode node, uint index, struct resource *res)
 883 {
 884         if (ofnode_is_np(node)) {
 885                 return of_address_to_resource(ofnode_to_np(node), index, res);
 886         } else {
 887                 struct fdt_resource fres;
 888                 int ret;
 889
 890                 ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node),
 891                                        "reg", index, &fres);
 892                 if (ret < 0)
 893                         return -EINVAL;
 894                 memset(res, '\0', sizeof(*res));
 895                 res->start = fres.start;
 896                 res->end = fres.end;
 897
 898                 return 0;
 899         }
 900 }
 901
 902 int ofnode_read_resource_byname(ofnode node, const char *name,
 903                                 struct resource *res)
 904 {
 905         int index;
 906
 907         index = ofnode_stringlist_search(node, "reg-names", name);
 908         if (index < 0)
 909                 return index;
 910
 911         return ofnode_read_resource(node, index, res);
 912 }
 913
 914 u64 ofnode_translate_address(ofnode node, const fdt32_t *in_addr)
 915 {
 916         if (ofnode_is_np(node))
 917                 return of_translate_address(ofnode_to_np(node), in_addr);
 918         else
 919                 return fdt_translate_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
 920 }
 921
 922 u64 ofnode_translate_dma_address(ofnode node, const fdt32_t *in_addr)
 923 {
 924         if (ofnode_is_np(node))
 925                 return of_translate_dma_address(ofnode_to_np(node), in_addr);
 926         else
 927                 return fdt_translate_dma_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
 928 }
 929
 930 int ofnode_device_is_compatible(ofnode node, const char *compat)
 931 {
 932         if (ofnode_is_np(node))
 933                 return of_device_is_compatible(ofnode_to_np(node), compat,
 934                                                NULL, NULL);
 935         else
 936                 return !fdt_node_check_compatible(gd->fdt_blob,
 937                                                   ofnode_to_offset(node),
 938                                                   compat);
 939 }
 940
 941 ofnode ofnode_by_compatible(ofnode from, const char *compat)
 942 {
 943         if (of_live_active()) {
 944                 return np_to_ofnode(of_find_compatible_node(
 945                         (struct device_node *)ofnode_to_np(from), NULL,
 946                         compat));
 947         } else {
 948                 return offset_to_ofnode(fdt_node_offset_by_compatible(
 949                                 gd->fdt_blob, ofnode_to_offset(from), compat));
 950         }
 951 }
 952
 953 ofnode ofnode_by_prop_value(ofnode from, const char *propname,
 954                             const void *propval, int proplen)
 955 {
 956         if (of_live_active()) {
 957                 return np_to_ofnode(of_find_node_by_prop_value(
 958                         (struct device_node *)ofnode_to_np(from), propname,
 959                         propval, proplen));
 960         } else {
 961                 return offset_to_ofnode(fdt_node_offset_by_prop_value(
 962                                 gd->fdt_blob, ofnode_to_offset(from),
 963                                 propname, propval, proplen));
 964         }
 965 }
 966
 967 int ofnode_write_prop(ofnode node, const char *propname, int len,
 968                       const void *value)
 969 {
 970         const struct device_node *np = ofnode_to_np(node);
 971         struct property *pp;
 972         struct property *pp_last = NULL;
 973         struct property *new;
 974
 975         if (!of_live_active())
 976                 return -ENOSYS;
 977
 978         if (!np)
 979                 return -EINVAL;
 980
 981         for (pp = np->properties; pp; pp = pp->next) {
 982                 if (strcmp(pp->name, propname) == 0) {
 983                         /* Property exists -> change value */
 984                         pp->value = (void *)value;
 985                         pp->length = len;
 986                         return 0;
 987                 }
 988                 pp_last = pp;
 989         }
 990
 991         if (!pp_last)
 992                 return -ENOENT;
 993
 994         /* Property does not exist -> append new property */
 995         new = malloc(sizeof(struct property));
 996         if (!new)
 997                 return -ENOMEM;
 998
 999         new->name = strdup(propname);
1000         if (!new->name) {
1001                 free(new);
1002                 return -ENOMEM;
1003         }
1004
1005         new->value = (void *)value;
1006         new->length = len;
1007         new->next = NULL;
1008
1009         pp_last->next = new;
1010
1011         return 0;
1012 }
1013
1014 int ofnode_write_string(ofnode node, const char *propname, const char *value)
1015 {
1016         if (!of_live_active())
1017                 return -ENOSYS;
1018
1019         assert(ofnode_valid(node));
1020
1021         debug("%s: %s = %s", __func__, propname, value);
1022
1023         return ofnode_write_prop(node, propname, strlen(value) + 1, value);
1024 }
1025
1026 int ofnode_set_enabled(ofnode node, bool value)
1027 {
1028         if (!of_live_active())
1029                 return -ENOSYS;
1030
1031         assert(ofnode_valid(node));
1032
1033         if (value)
1034                 return ofnode_write_string(node, "status", "okay");
1035         else
1036                 return ofnode_write_string(node, "status", "disabled");
1037 }