drivers/core/ofnode.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2017 Google, Inc
   4  * Written by Simon Glass <sjg@chromium.org>
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <fdtdec.h>
  10 #include <fdt_support.h>
  11 #include <log.h>
  12 #include <malloc.h>
  13 #include <linux/libfdt.h>
  14 #include <dm/of_access.h>
  15 #include <dm/of_addr.h>
  16 #include <dm/ofnode.h>
  17 #include <linux/err.h>
  18 #include <linux/ioport.h>
  19 #include <asm/global_data.h>
  20
  21 bool ofnode_name_eq(ofnode node, const char *name)
  22 {
  23         const char *node_name;
  24         size_t len;
  25
  26         assert(ofnode_valid(node));
  27
  28         node_name = ofnode_get_name(node);
  29         len = strchrnul(node_name, '@') - node_name;
  30
  31         return (strlen(name) == len) && !strncmp(node_name, name, len);
  32 }
  33
  34 int ofnode_read_u32(ofnode node, const char *propname, u32 *outp)
  35 {
  36         return ofnode_read_u32_index(node, propname, 0, outp);
  37 }
  38
  39 u32 ofnode_read_u32_default(ofnode node, const char *propname, u32 def)
  40 {
  41         assert(ofnode_valid(node));
  42         ofnode_read_u32_index(node, propname, 0, &def);
  43
  44         return def;
  45 }
  46
  47 int ofnode_read_u32_index(ofnode node, const char *propname, int index,
  48                           u32 *outp)
  49 {
  50         const fdt32_t *cell;
  51         int len;
  52
  53         assert(ofnode_valid(node));
  54         debug("%s: %s: ", __func__, propname);
  55
  56         if (ofnode_is_np(node))
  57                 return of_read_u32_index(ofnode_to_np(node), propname, index,
  58                                          outp);
  59
  60         cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
  61                            &len);
  62         if (!cell) {
  63                 debug("(not found)\n");
  64                 return -EINVAL;
  65         }
  66
  67         if (len < (sizeof(int) * (index + 1))) {
  68                 debug("(not large enough)\n");
  69                 return -EOVERFLOW;
  70         }
  71
  72         *outp = fdt32_to_cpu(cell[index]);
  73         debug("%#x (%d)\n", *outp, *outp);
  74
  75         return 0;
  76 }
  77
  78 u32 ofnode_read_u32_index_default(ofnode node, const char *propname, int index,
  79                                   u32 def)
  80 {
  81         assert(ofnode_valid(node));
  82         ofnode_read_u32_index(node, propname, index, &def);
  83
  84         return def;
  85 }
  86
  87 int ofnode_read_s32_default(ofnode node, const char *propname, s32 def)
  88 {
  89         assert(ofnode_valid(node));
  90         ofnode_read_u32(node, propname, (u32 *)&def);
  91
  92         return def;
  93 }
  94
  95 int ofnode_read_u64(ofnode node, const char *propname, u64 *outp)
  96 {
  97         const unaligned_fdt64_t *cell;
  98         int len;
  99
 100         assert(ofnode_valid(node));
 101         debug("%s: %s: ", __func__, propname);
 102
 103         if (ofnode_is_np(node))
 104                 return of_read_u64(ofnode_to_np(node), propname, outp);
 105
 106         cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
 107                            &len);
 108         if (!cell || len < sizeof(*cell)) {
 109                 debug("(not found)\n");
 110                 return -EINVAL;
 111         }
 112         *outp = fdt64_to_cpu(cell[0]);
 113         debug("%#llx (%lld)\n", (unsigned long long)*outp,
 114               (unsigned long long)*outp);
 115
 116         return 0;
 117 }
 118
 119 u64 ofnode_read_u64_default(ofnode node, const char *propname, u64 def)
 120 {
 121         assert(ofnode_valid(node));
 122         ofnode_read_u64(node, propname, &def);
 123
 124         return def;
 125 }
 126
 127 bool ofnode_read_bool(ofnode node, const char *propname)
 128 {
 129         const void *prop;
 130
 131         assert(ofnode_valid(node));
 132         debug("%s: %s: ", __func__, propname);
 133
 134         prop = ofnode_get_property(node, propname, NULL);
 135
 136         debug("%s\n", prop ? "true" : "false");
 137
 138         return prop ? true : false;
 139 }
 140
 141 const void *ofnode_read_prop(ofnode node, const char *propname, int *sizep)
 142 {
 143         const char *val = NULL;
 144         int len;
 145
 146         assert(ofnode_valid(node));
 147         debug("%s: %s: ", __func__, propname);
 148
 149         if (ofnode_is_np(node)) {
 150                 struct property *prop = of_find_property(
 151                                 ofnode_to_np(node), propname, &len);
 152
 153                 if (prop) {
 154                         val = prop->value;
 155                         len = prop->length;
 156                 }
 157         } else {
 158                 val = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
 159                                   propname, &len);
 160         }
 161         if (!val) {
 162                 debug("<not found>\n");
 163                 if (sizep)
 164                         *sizep = -FDT_ERR_NOTFOUND;
 165                 return NULL;
 166         }
 167         if (sizep)
 168                 *sizep = len;
 169
 170         return val;
 171 }
 172
 173 const char *ofnode_read_string(ofnode node, const char *propname)
 174 {
 175         const char *str;
 176         int len;
 177
 178         str = ofnode_read_prop(node, propname, &len);
 179         if (!str)
 180                 return NULL;
 181
 182         if (strnlen(str, len) >= len) {
 183                 debug("<invalid>\n");
 184                 return NULL;
 185         }
 186         debug("%s\n", str);
 187
 188         return str;
 189 }
 190
 191 int ofnode_read_size(ofnode node, const char *propname)
 192 {
 193         int len;
 194
 195         if (!ofnode_read_prop(node, propname, &len))
 196                 return -EINVAL;
 197
 198         return len;
 199 }
 200
 201 ofnode ofnode_find_subnode(ofnode node, const char *subnode_name)
 202 {
 203         ofnode subnode;
 204
 205         assert(ofnode_valid(node));
 206         debug("%s: %s: ", __func__, subnode_name);
 207
 208         if (ofnode_is_np(node)) {
 209                 const struct device_node *np = ofnode_to_np(node);
 210
 211                 for (np = np->child; np; np = np->sibling) {
 212                         if (!strcmp(subnode_name, np->name))
 213                                 break;
 214                 }
 215                 subnode = np_to_ofnode(np);
 216         } else {
 217                 int ooffset = fdt_subnode_offset(gd->fdt_blob,
 218                                 ofnode_to_offset(node), subnode_name);
 219                 subnode = offset_to_ofnode(ooffset);
 220         }
 221         debug("%s\n", ofnode_valid(subnode) ?
 222               ofnode_get_name(subnode) : "<none>");
 223
 224         return subnode;
 225 }
 226
 227 int ofnode_read_u32_array(ofnode node, const char *propname,
 228                           u32 *out_values, size_t sz)
 229 {
 230         assert(ofnode_valid(node));
 231         debug("%s: %s: ", __func__, propname);
 232
 233         if (ofnode_is_np(node)) {
 234                 return of_read_u32_array(ofnode_to_np(node), propname,
 235                                          out_values, sz);
 236         } else {
 237                 return fdtdec_get_int_array(gd->fdt_blob,
 238                                             ofnode_to_offset(node), propname,
 239                                             out_values, sz);
 240         }
 241 }
 242
 243 #if !CONFIG_IS_ENABLED(DM_INLINE_OFNODE)
 244 bool ofnode_is_enabled(ofnode node)
 245 {
 246         if (ofnode_is_np(node)) {
 247                 return of_device_is_available(ofnode_to_np(node));
 248         } else {
 249                 return fdtdec_get_is_enabled(gd->fdt_blob,
 250                                              ofnode_to_offset(node));
 251         }
 252 }
 253
 254 ofnode ofnode_first_subnode(ofnode node)
 255 {
 256         assert(ofnode_valid(node));
 257         if (ofnode_is_np(node))
 258                 return np_to_ofnode(node.np->child);
 259
 260         return offset_to_ofnode(
 261                 fdt_first_subnode(gd->fdt_blob, ofnode_to_offset(node)));
 262 }
 263
 264 ofnode ofnode_next_subnode(ofnode node)
 265 {
 266         assert(ofnode_valid(node));
 267         if (ofnode_is_np(node))
 268                 return np_to_ofnode(node.np->sibling);
 269
 270         return offset_to_ofnode(
 271                 fdt_next_subnode(gd->fdt_blob, ofnode_to_offset(node)));
 272 }
 273 #endif /* !DM_INLINE_OFNODE */
 274
 275 ofnode ofnode_get_parent(ofnode node)
 276 {
 277         ofnode parent;
 278
 279         assert(ofnode_valid(node));
 280         if (ofnode_is_np(node))
 281                 parent = np_to_ofnode(of_get_parent(ofnode_to_np(node)));
 282         else
 283                 parent.of_offset = fdt_parent_offset(gd->fdt_blob,
 284                                                      ofnode_to_offset(node));
 285
 286         return parent;
 287 }
 288
 289 const char *ofnode_get_name(ofnode node)
 290 {
 291         if (!ofnode_valid(node)) {
 292                 debug("%s node not valid\n", __func__);
 293                 return NULL;
 294         }
 295
 296         if (ofnode_is_np(node))
 297                 return strrchr(node.np->full_name, '/') + 1;
 298
 299         return fdt_get_name(gd->fdt_blob, ofnode_to_offset(node), NULL);
 300 }
 301
 302 int ofnode_get_path(ofnode node, char *buf, int buflen)
 303 {
 304         assert(ofnode_valid(node));
 305
 306         if (ofnode_is_np(node)) {
 307                 if (strlen(node.np->full_name) >= buflen)
 308                         return -ENOSPC;
 309
 310                 strcpy(buf, node.np->full_name);
 311
 312                 return 0;
 313         } else {
 314                 int res;
 315
 316                 res = fdt_get_path(gd->fdt_blob, ofnode_to_offset(node), buf,
 317                                    buflen);
 318                 if (!res)
 319                         return res;
 320                 else if (res == -FDT_ERR_NOSPACE)
 321                         return -ENOSPC;
 322                 else
 323                         return -EINVAL;
 324         }
 325 }
 326
 327 ofnode ofnode_get_by_phandle(uint phandle)
 328 {
 329         ofnode node;
 330
 331         if (of_live_active())
 332                 node = np_to_ofnode(of_find_node_by_phandle(phandle));
 333         else
 334                 node.of_offset = fdt_node_offset_by_phandle(gd->fdt_blob,
 335                                                             phandle);
 336
 337         return node;
 338 }
 339
 340 static fdt_addr_t __ofnode_get_addr_size_index(ofnode node, int index,
 341                                                fdt_size_t *size, bool translate)
 342 {
 343         int na, ns;
 344
 345         if (size)
 346                 *size = FDT_SIZE_T_NONE;
 347
 348         if (ofnode_is_np(node)) {
 349                 const __be32 *prop_val;
 350                 u64 size64;
 351                 uint flags;
 352
 353                 prop_val = of_get_address(ofnode_to_np(node), index, &size64,
 354                                           &flags);
 355                 if (!prop_val)
 356                         return FDT_ADDR_T_NONE;
 357
 358                 if (size)
 359                         *size = size64;
 360
 361                 ns = of_n_size_cells(ofnode_to_np(node));
 362
 363                 if (translate && IS_ENABLED(CONFIG_OF_TRANSLATE) && ns > 0) {
 364                         return of_translate_address(ofnode_to_np(node), prop_val);
 365                 } else {
 366                         na = of_n_addr_cells(ofnode_to_np(node));
 367                         return of_read_number(prop_val, na);
 368                 }
 369         } else {
 370                 na = ofnode_read_simple_addr_cells(ofnode_get_parent(node));
 371                 ns = ofnode_read_simple_size_cells(ofnode_get_parent(node));
 372                 return fdtdec_get_addr_size_fixed(gd->fdt_blob,
 373                                                   ofnode_to_offset(node), "reg",
 374                                                   index, na, ns, size,
 375                                                   translate);
 376         }
 377 }
 378
 379 fdt_addr_t ofnode_get_addr_size_index(ofnode node, int index, fdt_size_t *size)
 380 {
 381         return __ofnode_get_addr_size_index(node, index, size, true);
 382 }
 383
 384 fdt_addr_t ofnode_get_addr_size_index_notrans(ofnode node, int index,
 385                                               fdt_size_t *size)
 386 {
 387         return __ofnode_get_addr_size_index(node, index, size, false);
 388 }
 389
 390 fdt_addr_t ofnode_get_addr_index(ofnode node, int index)
 391 {
 392         fdt_size_t size;
 393
 394         return ofnode_get_addr_size_index(node, index, &size);
 395 }
 396
 397 fdt_addr_t ofnode_get_addr(ofnode node)
 398 {
 399         return ofnode_get_addr_index(node, 0);
 400 }
 401
 402 fdt_size_t ofnode_get_size(ofnode node)
 403 {
 404         fdt_size_t size;
 405
 406         ofnode_get_addr_size_index(node, 0, &size);
 407
 408         return size;
 409 }
 410
 411 int ofnode_stringlist_search(ofnode node, const char *property,
 412                              const char *string)
 413 {
 414         if (ofnode_is_np(node)) {
 415                 return of_property_match_string(ofnode_to_np(node),
 416                                                 property, string);
 417         } else {
 418                 int ret;
 419
 420                 ret = fdt_stringlist_search(gd->fdt_blob,
 421                                             ofnode_to_offset(node), property,
 422                                             string);
 423                 if (ret == -FDT_ERR_NOTFOUND)
 424                         return -ENODATA;
 425                 else if (ret < 0)
 426                         return -EINVAL;
 427
 428                 return ret;
 429         }
 430 }
 431
 432 int ofnode_read_string_index(ofnode node, const char *property, int index,
 433                              const char **outp)
 434 {
 435         if (ofnode_is_np(node)) {
 436                 return of_property_read_string_index(ofnode_to_np(node),
 437                                                      property, index, outp);
 438         } else {
 439                 int len;
 440
 441                 *outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node),
 442                                            property, index, &len);
 443                 if (len < 0)
 444                         return -EINVAL;
 445                 return 0;
 446         }
 447 }
 448
 449 int ofnode_read_string_count(ofnode node, const char *property)
 450 {
 451         if (ofnode_is_np(node)) {
 452                 return of_property_count_strings(ofnode_to_np(node), property);
 453         } else {
 454                 return fdt_stringlist_count(gd->fdt_blob,
 455                                             ofnode_to_offset(node), property);
 456         }
 457 }
 458
 459 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in,
 460                                             struct ofnode_phandle_args *out)
 461 {
 462         assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
 463         out->node = offset_to_ofnode(in->node);
 464         out->args_count = in->args_count;
 465         memcpy(out->args, in->args, sizeof(out->args));
 466 }
 467
 468 static void ofnode_from_of_phandle_args(struct of_phandle_args *in,
 469                                         struct ofnode_phandle_args *out)
 470 {
 471         assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
 472         out->node = np_to_ofnode(in->np);
 473         out->args_count = in->args_count;
 474         memcpy(out->args, in->args, sizeof(out->args));
 475 }
 476
 477 int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
 478                                    const char *cells_name, int cell_count,
 479                                    int index,
 480                                    struct ofnode_phandle_args *out_args)
 481 {
 482         if (ofnode_is_np(node)) {
 483                 struct of_phandle_args args;
 484                 int ret;
 485
 486                 ret = of_parse_phandle_with_args(ofnode_to_np(node),
 487                                                  list_name, cells_name,
 488                                                  cell_count, index,
 489                                                  &args);
 490                 if (ret)
 491                         return ret;
 492                 ofnode_from_of_phandle_args(&args, out_args);
 493         } else {
 494                 struct fdtdec_phandle_args args;
 495                 int ret;
 496
 497                 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob,
 498                                                      ofnode_to_offset(node),
 499                                                      list_name, cells_name,
 500                                                      cell_count, index, &args);
 501                 if (ret)
 502                         return ret;
 503                 ofnode_from_fdtdec_phandle_args(&args, out_args);
 504         }
 505
 506         return 0;
 507 }
 508
 509 int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
 510                                    const char *cells_name, int cell_count)
 511 {
 512         if (ofnode_is_np(node))
 513                 return of_count_phandle_with_args(ofnode_to_np(node),
 514                                 list_name, cells_name, cell_count);
 515         else
 516                 return fdtdec_parse_phandle_with_args(gd->fdt_blob,
 517                                 ofnode_to_offset(node), list_name, cells_name,
 518                                 cell_count, -1, NULL);
 519 }
 520
 521 ofnode ofnode_path(const char *path)
 522 {
 523         if (of_live_active())
 524                 return np_to_ofnode(of_find_node_by_path(path));
 525         else
 526                 return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path));
 527 }
 528
 529 const void *ofnode_read_chosen_prop(const char *propname, int *sizep)
 530 {
 531         ofnode chosen_node;
 532
 533         chosen_node = ofnode_path("/chosen");
 534
 535         return ofnode_read_prop(chosen_node, propname, sizep);
 536 }
 537
 538 const char *ofnode_read_chosen_string(const char *propname)
 539 {
 540         return ofnode_read_chosen_prop(propname, NULL);
 541 }
 542
 543 ofnode ofnode_get_chosen_node(const char *name)
 544 {
 545         const char *prop;
 546
 547         prop = ofnode_read_chosen_prop(name, NULL);
 548         if (!prop)
 549                 return ofnode_null();
 550
 551         return ofnode_path(prop);
 552 }
 553
 554 const void *ofnode_read_aliases_prop(const char *propname, int *sizep)
 555 {
 556         ofnode node;
 557
 558         node = ofnode_path("/aliases");
 559
 560         return ofnode_read_prop(node, propname, sizep);
 561 }
 562
 563 ofnode ofnode_get_aliases_node(const char *name)
 564 {
 565         const char *prop;
 566
 567         prop = ofnode_read_aliases_prop(name, NULL);
 568         if (!prop)
 569                 return ofnode_null();
 570
 571         debug("%s: node_path: %s\n", __func__, prop);
 572
 573         return ofnode_path(prop);
 574 }
 575
 576 int ofnode_get_child_count(ofnode parent)
 577 {
 578         ofnode child;
 579         int num = 0;
 580
 581         ofnode_for_each_subnode(child, parent)
 582                 num++;
 583
 584         return num;
 585 }
 586
 587 static int decode_timing_property(ofnode node, const char *name,
 588                                   struct timing_entry *result)
 589 {
 590         int length, ret = 0;
 591
 592         length = ofnode_read_size(node, name);
 593         if (length < 0) {
 594                 debug("%s: could not find property %s\n",
 595                       ofnode_get_name(node), name);
 596                 return length;
 597         }
 598
 599         if (length == sizeof(u32)) {
 600                 result->typ = ofnode_read_u32_default(node, name, 0);
 601                 result->min = result->typ;
 602                 result->max = result->typ;
 603         } else {
 604                 ret = ofnode_read_u32_array(node, name, &result->min, 3);
 605         }
 606
 607         return ret;
 608 }
 609
 610 int ofnode_decode_display_timing(ofnode parent, int index,
 611                                  struct display_timing *dt)
 612 {
 613         int i;
 614         ofnode timings, node;
 615         u32 val = 0;
 616         int ret = 0;
 617
 618         timings = ofnode_find_subnode(parent, "display-timings");
 619         if (!ofnode_valid(timings))
 620                 return -EINVAL;
 621
 622         i = 0;
 623         ofnode_for_each_subnode(node, timings) {
 624                 if (i++ == index)
 625                         break;
 626         }
 627
 628         if (!ofnode_valid(node))
 629                 return -EINVAL;
 630
 631         memset(dt, 0, sizeof(*dt));
 632
 633         ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch);
 634         ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch);
 635         ret |= decode_timing_property(node, "hactive", &dt->hactive);
 636         ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len);
 637         ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch);
 638         ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch);
 639         ret |= decode_timing_property(node, "vactive", &dt->vactive);
 640         ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len);
 641         ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock);
 642
 643         dt->flags = 0;
 644         val = ofnode_read_u32_default(node, "vsync-active", -1);
 645         if (val != -1) {
 646                 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
 647                                 DISPLAY_FLAGS_VSYNC_LOW;
 648         }
 649         val = ofnode_read_u32_default(node, "hsync-active", -1);
 650         if (val != -1) {
 651                 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
 652                                 DISPLAY_FLAGS_HSYNC_LOW;
 653         }
 654         val = ofnode_read_u32_default(node, "de-active", -1);
 655         if (val != -1) {
 656                 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
 657                                 DISPLAY_FLAGS_DE_LOW;
 658         }
 659         val = ofnode_read_u32_default(node, "pixelclk-active", -1);
 660         if (val != -1) {
 661                 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
 662                                 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
 663         }
 664
 665         if (ofnode_read_bool(node, "interlaced"))
 666                 dt->flags |= DISPLAY_FLAGS_INTERLACED;
 667         if (ofnode_read_bool(node, "doublescan"))
 668                 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
 669         if (ofnode_read_bool(node, "doubleclk"))
 670                 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
 671
 672         return ret;
 673 }
 674
 675 const void *ofnode_get_property(ofnode node, const char *propname, int *lenp)
 676 {
 677         if (ofnode_is_np(node))
 678                 return of_get_property(ofnode_to_np(node), propname, lenp);
 679         else
 680                 return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
 681                                    propname, lenp);
 682 }
 683
 684 int ofnode_get_first_property(ofnode node, struct ofprop *prop)
 685 {
 686         prop->node = node;
 687
 688         if (ofnode_is_np(node)) {
 689                 prop->prop = of_get_first_property(ofnode_to_np(prop->node));
 690                 if (!prop->prop)
 691                         return -FDT_ERR_NOTFOUND;
 692         } else {
 693                 prop->offset =
 694                         fdt_first_property_offset(gd->fdt_blob,
 695                                                   ofnode_to_offset(prop->node));
 696                 if (prop->offset < 0)
 697                         return prop->offset;
 698         }
 699
 700         return 0;
 701 }
 702
 703 int ofnode_get_next_property(struct ofprop *prop)
 704 {
 705         if (ofnode_is_np(prop->node)) {
 706                 prop->prop = of_get_next_property(ofnode_to_np(prop->node),
 707                                                   prop->prop);
 708                 if (!prop->prop)
 709                         return -FDT_ERR_NOTFOUND;
 710         } else {
 711                 prop->offset = fdt_next_property_offset(gd->fdt_blob,
 712                                                         prop->offset);
 713                 if (prop->offset  < 0)
 714                         return prop->offset;
 715         }
 716
 717         return 0;
 718 }
 719
 720 const void *ofnode_get_property_by_prop(const struct ofprop *prop,
 721                                         const char **propname, int *lenp)
 722 {
 723         if (ofnode_is_np(prop->node))
 724                 return of_get_property_by_prop(ofnode_to_np(prop->node),
 725                                                prop->prop, propname, lenp);
 726         else
 727                 return fdt_getprop_by_offset(gd->fdt_blob,
 728                                              prop->offset,
 729                                              propname, lenp);
 730 }
 731
 732 bool ofnode_is_available(ofnode node)
 733 {
 734         if (ofnode_is_np(node))
 735                 return of_device_is_available(ofnode_to_np(node));
 736         else
 737                 return fdtdec_get_is_enabled(gd->fdt_blob,
 738                                              ofnode_to_offset(node));
 739 }
 740
 741 fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property,
 742                                 fdt_size_t *sizep)
 743 {
 744         if (ofnode_is_np(node)) {
 745                 int na, ns;
 746                 int psize;
 747                 const struct device_node *np = ofnode_to_np(node);
 748                 const __be32 *prop = of_get_property(np, property, &psize);
 749
 750                 if (!prop)
 751                         return FDT_ADDR_T_NONE;
 752                 na = of_n_addr_cells(np);
 753                 ns = of_n_size_cells(np);
 754                 *sizep = of_read_number(prop + na, ns);
 755
 756                 if (CONFIG_IS_ENABLED(OF_TRANSLATE) && ns > 0)
 757                         return of_translate_address(np, prop);
 758                 else
 759                         return of_read_number(prop, na);
 760         } else {
 761                 return fdtdec_get_addr_size(gd->fdt_blob,
 762                                             ofnode_to_offset(node), property,
 763                                             sizep);
 764         }
 765 }
 766
 767 const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
 768                                         size_t sz)
 769 {
 770         if (ofnode_is_np(node)) {
 771                 const struct device_node *np = ofnode_to_np(node);
 772                 int psize;
 773                 const __be32 *prop = of_get_property(np, propname, &psize);
 774
 775                 if (!prop || sz != psize)
 776                         return NULL;
 777                 return (uint8_t *)prop;
 778
 779         } else {
 780                 return fdtdec_locate_byte_array(gd->fdt_blob,
 781                                 ofnode_to_offset(node), propname, sz);
 782         }
 783 }
 784
 785 int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
 786                          const char *propname, struct fdt_pci_addr *addr)
 787 {
 788         const fdt32_t *cell;
 789         int len;
 790         int ret = -ENOENT;
 791
 792         debug("%s: %s: ", __func__, propname);
 793
 794         /*
 795          * If we follow the pci bus bindings strictly, we should check
 796          * the value of the node's parent node's #address-cells and
 797          * #size-cells. They need to be 3 and 2 accordingly. However,
 798          * for simplicity we skip the check here.
 799          */
 800         cell = ofnode_get_property(node, propname, &len);
 801         if (!cell)
 802                 goto fail;
 803
 804         if ((len % FDT_PCI_REG_SIZE) == 0) {
 805                 int num = len / FDT_PCI_REG_SIZE;
 806                 int i;
 807
 808                 for (i = 0; i < num; i++) {
 809                         debug("pci address #%d: %08lx %08lx %08lx\n", i,
 810                               (ulong)fdt32_to_cpu(cell[0]),
 811                               (ulong)fdt32_to_cpu(cell[1]),
 812                               (ulong)fdt32_to_cpu(cell[2]));
 813                         if ((fdt32_to_cpu(*cell) & type) == type) {
 814                                 addr->phys_hi = fdt32_to_cpu(cell[0]);
 815                                 addr->phys_mid = fdt32_to_cpu(cell[1]);
 816                                 addr->phys_lo = fdt32_to_cpu(cell[2]);
 817                                 break;
 818                         }
 819
 820                         cell += (FDT_PCI_ADDR_CELLS +
 821                                  FDT_PCI_SIZE_CELLS);
 822                 }
 823
 824                 if (i == num) {
 825                         ret = -ENXIO;
 826                         goto fail;
 827                 }
 828
 829                 return 0;
 830         }
 831
 832         ret = -EINVAL;
 833
 834 fail:
 835         debug("(not found)\n");
 836         return ret;
 837 }
 838
 839 int ofnode_read_pci_vendev(ofnode node, u16 *vendor, u16 *device)
 840 {
 841         const char *list, *end;
 842         int len;
 843
 844         list = ofnode_get_property(node, "compatible", &len);
 845         if (!list)
 846                 return -ENOENT;
 847
 848         end = list + len;
 849         while (list < end) {
 850                 len = strlen(list);
 851                 if (len >= strlen("pciVVVV,DDDD")) {
 852                         char *s = strstr(list, "pci");
 853
 854                         /*
 855                          * check if the string is something like pciVVVV,DDDD.RR
 856                          * or just pciVVVV,DDDD
 857                          */
 858                         if (s && s[7] == ',' &&
 859                             (s[12] == '.' || s[12] == 0)) {
 860                                 s += 3;
 861                                 *vendor = simple_strtol(s, NULL, 16);
 862
 863                                 s += 5;
 864                                 *device = simple_strtol(s, NULL, 16);
 865
 866                                 return 0;
 867                         }
 868                 }
 869                 list += (len + 1);
 870         }
 871
 872         return -ENOENT;
 873 }
 874
 875 int ofnode_read_addr_cells(ofnode node)
 876 {
 877         if (ofnode_is_np(node)) {
 878                 return of_n_addr_cells(ofnode_to_np(node));
 879         } else {
 880                 int parent = fdt_parent_offset(gd->fdt_blob,
 881                                                ofnode_to_offset(node));
 882
 883                 return fdt_address_cells(gd->fdt_blob, parent);
 884         }
 885 }
 886
 887 int ofnode_read_size_cells(ofnode node)
 888 {
 889         if (ofnode_is_np(node)) {
 890                 return of_n_size_cells(ofnode_to_np(node));
 891         } else {
 892                 int parent = fdt_parent_offset(gd->fdt_blob,
 893                                                ofnode_to_offset(node));
 894
 895                 return fdt_size_cells(gd->fdt_blob, parent);
 896         }
 897 }
 898
 899 int ofnode_read_simple_addr_cells(ofnode node)
 900 {
 901         if (ofnode_is_np(node))
 902                 return of_simple_addr_cells(ofnode_to_np(node));
 903         else
 904                 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
 905 }
 906
 907 int ofnode_read_simple_size_cells(ofnode node)
 908 {
 909         if (ofnode_is_np(node))
 910                 return of_simple_size_cells(ofnode_to_np(node));
 911         else
 912                 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
 913 }
 914
 915 bool ofnode_pre_reloc(ofnode node)
 916 {
 917 #if defined(CONFIG_SPL_BUILD) || defined(CONFIG_TPL_BUILD)
 918         /* for SPL and TPL the remaining nodes after the fdtgrep 1st pass
 919          * had property dm-pre-reloc or u-boot,dm-spl/tpl.
 920          * They are removed in final dtb (fdtgrep 2nd pass)
 921          */
 922         return true;
 923 #else
 924         if (ofnode_read_bool(node, "u-boot,dm-pre-reloc"))
 925                 return true;
 926         if (ofnode_read_bool(node, "u-boot,dm-pre-proper"))
 927                 return true;
 928
 929         /*
 930          * In regular builds individual spl and tpl handling both
 931          * count as handled pre-relocation for later second init.
 932          */
 933         if (ofnode_read_bool(node, "u-boot,dm-spl") ||
 934             ofnode_read_bool(node, "u-boot,dm-tpl"))
 935                 return true;
 936
 937         return false;
 938 #endif
 939 }
 940
 941 int ofnode_read_resource(ofnode node, uint index, struct resource *res)
 942 {
 943         if (ofnode_is_np(node)) {
 944                 return of_address_to_resource(ofnode_to_np(node), index, res);
 945         } else {
 946                 struct fdt_resource fres;
 947                 int ret;
 948
 949                 ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node),
 950                                        "reg", index, &fres);
 951                 if (ret < 0)
 952                         return -EINVAL;
 953                 memset(res, '\0', sizeof(*res));
 954                 res->start = fres.start;
 955                 res->end = fres.end;
 956
 957                 return 0;
 958         }
 959 }
 960
 961 int ofnode_read_resource_byname(ofnode node, const char *name,
 962                                 struct resource *res)
 963 {
 964         int index;
 965
 966         index = ofnode_stringlist_search(node, "reg-names", name);
 967         if (index < 0)
 968                 return index;
 969
 970         return ofnode_read_resource(node, index, res);
 971 }
 972
 973 u64 ofnode_translate_address(ofnode node, const fdt32_t *in_addr)
 974 {
 975         if (ofnode_is_np(node))
 976                 return of_translate_address(ofnode_to_np(node), in_addr);
 977         else
 978                 return fdt_translate_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
 979 }
 980
 981 u64 ofnode_translate_dma_address(ofnode node, const fdt32_t *in_addr)
 982 {
 983         if (ofnode_is_np(node))
 984                 return of_translate_dma_address(ofnode_to_np(node), in_addr);
 985         else
 986                 return fdt_translate_dma_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
 987 }
 988
 989 int ofnode_get_dma_range(ofnode node, phys_addr_t *cpu, dma_addr_t *bus, u64 *size)
 990 {
 991         if (ofnode_is_np(node))
 992                 return of_get_dma_range(ofnode_to_np(node), cpu, bus, size);
 993         else
 994                 return fdt_get_dma_range(gd->fdt_blob, ofnode_to_offset(node),
 995                                          cpu, bus, size);
 996 }
 997
 998 int ofnode_device_is_compatible(ofnode node, const char *compat)
 999 {
1000         if (ofnode_is_np(node))
1001                 return of_device_is_compatible(ofnode_to_np(node), compat,
1002                                                NULL, NULL);
1003         else
1004                 return !fdt_node_check_compatible(gd->fdt_blob,
1005                                                   ofnode_to_offset(node),
1006                                                   compat);
1007 }
1008
1009 ofnode ofnode_by_compatible(ofnode from, const char *compat)
1010 {
1011         if (of_live_active()) {
1012                 return np_to_ofnode(of_find_compatible_node(
1013                         (struct device_node *)ofnode_to_np(from), NULL,
1014                         compat));
1015         } else {
1016                 return offset_to_ofnode(fdt_node_offset_by_compatible(
1017                                 gd->fdt_blob, ofnode_to_offset(from), compat));
1018         }
1019 }
1020
1021 ofnode ofnode_by_prop_value(ofnode from, const char *propname,
1022                             const void *propval, int proplen)
1023 {
1024         if (of_live_active()) {
1025                 return np_to_ofnode(of_find_node_by_prop_value(
1026                         (struct device_node *)ofnode_to_np(from), propname,
1027                         propval, proplen));
1028         } else {
1029                 return offset_to_ofnode(fdt_node_offset_by_prop_value(
1030                                 gd->fdt_blob, ofnode_to_offset(from),
1031                                 propname, propval, proplen));
1032         }
1033 }
1034
1035 int ofnode_write_prop(ofnode node, const char *propname, int len,
1036                       const void *value)
1037 {
1038         const struct device_node *np = ofnode_to_np(node);
1039         struct property *pp;
1040         struct property *pp_last = NULL;
1041         struct property *new;
1042
1043         if (!of_live_active())
1044                 return -ENOSYS;
1045
1046         if (!np)
1047                 return -EINVAL;
1048
1049         for (pp = np->properties; pp; pp = pp->next) {
1050                 if (strcmp(pp->name, propname) == 0) {
1051                         /* Property exists -> change value */
1052                         pp->value = (void *)value;
1053                         pp->length = len;
1054                         return 0;
1055                 }
1056                 pp_last = pp;
1057         }
1058
1059         if (!pp_last)
1060                 return -ENOENT;
1061
1062         /* Property does not exist -> append new property */
1063         new = malloc(sizeof(struct property));
1064         if (!new)
1065                 return -ENOMEM;
1066
1067         new->name = strdup(propname);
1068         if (!new->name) {
1069                 free(new);
1070                 return -ENOMEM;
1071         }
1072
1073         new->value = (void *)value;
1074         new->length = len;
1075         new->next = NULL;
1076
1077         pp_last->next = new;
1078
1079         return 0;
1080 }
1081
1082 int ofnode_write_string(ofnode node, const char *propname, const char *value)
1083 {
1084         if (!of_live_active())
1085                 return -ENOSYS;
1086
1087         assert(ofnode_valid(node));
1088
1089         debug("%s: %s = %s", __func__, propname, value);
1090
1091         return ofnode_write_prop(node, propname, strlen(value) + 1, value);
1092 }
1093
1094 int ofnode_set_enabled(ofnode node, bool value)
1095 {
1096         if (!of_live_active())
1097                 return -ENOSYS;
1098
1099         assert(ofnode_valid(node));
1100
1101         if (value)
1102                 return ofnode_write_string(node, "status", "okay");
1103         else
1104                 return ofnode_write_string(node, "status", "disabled");
1105 }
1106
1107 bool ofnode_conf_read_bool(const char *prop_name)
1108 {
1109         ofnode node;
1110
1111         node = ofnode_path("/config");
1112         if (!ofnode_valid(node))
1113                 return false;
1114
1115         return ofnode_read_bool(node, prop_name);
1116 }
1117
1118 int ofnode_conf_read_int(const char *prop_name, int default_val)
1119 {
1120         ofnode node;
1121
1122         node = ofnode_path("/config");
1123         if (!ofnode_valid(node))
1124                 return default_val;
1125
1126         return ofnode_read_u32_default(node, prop_name, default_val);
1127 }
1128
1129 const char *ofnode_conf_read_str(const char *prop_name)
1130 {
1131         ofnode node;
1132
1133         node = ofnode_path("/config");
1134         if (!ofnode_valid(node))
1135                 return NULL;
1136
1137         return ofnode_read_string(node, prop_name);
1138 }