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) &&
 323                     (ns > 0 || gd_size_cells_0())) {
 324                         return of_translate_address(ofnode_to_np(node), prop_val);
 325                 } else {
 326                         na = of_n_addr_cells(ofnode_to_np(node));
 327                         return of_read_number(prop_val, na);
 328                 }
 329         } else {
 330                 na = ofnode_read_simple_addr_cells(ofnode_get_parent(node));
 331                 ns = ofnode_read_simple_size_cells(ofnode_get_parent(node));
 332                 return fdtdec_get_addr_size_fixed(gd->fdt_blob,
 333                                                   ofnode_to_offset(node), "reg",
 334                                                   index, na, ns, size, true);
 335         }
 336
 337         return FDT_ADDR_T_NONE;
 338 }
 339
 340 fdt_addr_t ofnode_get_addr_index(ofnode node, int index)
 341 {
 342         fdt_size_t size;
 343
 344         return ofnode_get_addr_size_index(node, index, &size);
 345 }
 346
 347 fdt_addr_t ofnode_get_addr(ofnode node)
 348 {
 349         return ofnode_get_addr_index(node, 0);
 350 }
 351
 352 fdt_size_t ofnode_get_size(ofnode node)
 353 {
 354         fdt_size_t size;
 355
 356         ofnode_get_addr_size_index(node, 0, &size);
 357
 358         return size;
 359 }
 360
 361 int ofnode_stringlist_search(ofnode node, const char *property,
 362                              const char *string)
 363 {
 364         if (ofnode_is_np(node)) {
 365                 return of_property_match_string(ofnode_to_np(node),
 366                                                 property, string);
 367         } else {
 368                 int ret;
 369
 370                 ret = fdt_stringlist_search(gd->fdt_blob,
 371                                             ofnode_to_offset(node), property,
 372                                             string);
 373                 if (ret == -FDT_ERR_NOTFOUND)
 374                         return -ENODATA;
 375                 else if (ret < 0)
 376                         return -EINVAL;
 377
 378                 return ret;
 379         }
 380 }
 381
 382 int ofnode_read_string_index(ofnode node, const char *property, int index,
 383                              const char **outp)
 384 {
 385         if (ofnode_is_np(node)) {
 386                 return of_property_read_string_index(ofnode_to_np(node),
 387                                                      property, index, outp);
 388         } else {
 389                 int len;
 390
 391                 *outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node),
 392                                            property, index, &len);
 393                 if (len < 0)
 394                         return -EINVAL;
 395                 return 0;
 396         }
 397 }
 398
 399 int ofnode_read_string_count(ofnode node, const char *property)
 400 {
 401         if (ofnode_is_np(node)) {
 402                 return of_property_count_strings(ofnode_to_np(node), property);
 403         } else {
 404                 return fdt_stringlist_count(gd->fdt_blob,
 405                                             ofnode_to_offset(node), property);
 406         }
 407 }
 408
 409 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in,
 410                                             struct ofnode_phandle_args *out)
 411 {
 412         assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
 413         out->node = offset_to_ofnode(in->node);
 414         out->args_count = in->args_count;
 415         memcpy(out->args, in->args, sizeof(out->args));
 416 }
 417
 418 static void ofnode_from_of_phandle_args(struct of_phandle_args *in,
 419                                         struct ofnode_phandle_args *out)
 420 {
 421         assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
 422         out->node = np_to_ofnode(in->np);
 423         out->args_count = in->args_count;
 424         memcpy(out->args, in->args, sizeof(out->args));
 425 }
 426
 427 int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
 428                                    const char *cells_name, int cell_count,
 429                                    int index,
 430                                    struct ofnode_phandle_args *out_args)
 431 {
 432         if (ofnode_is_np(node)) {
 433                 struct of_phandle_args args;
 434                 int ret;
 435
 436                 ret = of_parse_phandle_with_args(ofnode_to_np(node),
 437                                                  list_name, cells_name,
 438                                                  cell_count, index,
 439                                                  &args);
 440                 if (ret)
 441                         return ret;
 442                 ofnode_from_of_phandle_args(&args, out_args);
 443         } else {
 444                 struct fdtdec_phandle_args args;
 445                 int ret;
 446
 447                 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob,
 448                                                      ofnode_to_offset(node),
 449                                                      list_name, cells_name,
 450                                                      cell_count, index, &args);
 451                 if (ret)
 452                         return ret;
 453                 ofnode_from_fdtdec_phandle_args(&args, out_args);
 454         }
 455
 456         return 0;
 457 }
 458
 459 int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
 460                                    const char *cells_name, int cell_count)
 461 {
 462         if (ofnode_is_np(node))
 463                 return of_count_phandle_with_args(ofnode_to_np(node),
 464                                 list_name, cells_name, cell_count);
 465         else
 466                 return fdtdec_parse_phandle_with_args(gd->fdt_blob,
 467                                 ofnode_to_offset(node), list_name, cells_name,
 468                                 cell_count, -1, NULL);
 469 }
 470
 471 ofnode ofnode_path(const char *path)
 472 {
 473         if (of_live_active())
 474                 return np_to_ofnode(of_find_node_by_path(path));
 475         else
 476                 return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path));
 477 }
 478
 479 const void *ofnode_read_chosen_prop(const char *propname, int *sizep)
 480 {
 481         ofnode chosen_node;
 482
 483         chosen_node = ofnode_path("/chosen");
 484
 485         return ofnode_read_prop(chosen_node, propname, sizep);
 486 }
 487
 488 const char *ofnode_read_chosen_string(const char *propname)
 489 {
 490         return ofnode_read_chosen_prop(propname, NULL);
 491 }
 492
 493 ofnode ofnode_get_chosen_node(const char *name)
 494 {
 495         const char *prop;
 496
 497         prop = ofnode_read_chosen_prop(name, NULL);
 498         if (!prop)
 499                 return ofnode_null();
 500
 501         return ofnode_path(prop);
 502 }
 503
 504 const void *ofnode_read_aliases_prop(const char *propname, int *sizep)
 505 {
 506         ofnode node;
 507
 508         node = ofnode_path("/aliases");
 509
 510         return ofnode_read_prop(node, propname, sizep);
 511 }
 512
 513 ofnode ofnode_get_aliases_node(const char *name)
 514 {
 515         const char *prop;
 516
 517         prop = ofnode_read_aliases_prop(name, NULL);
 518         if (!prop)
 519                 return ofnode_null();
 520
 521         debug("%s: node_path: %s\n", __func__, prop);
 522
 523         return ofnode_path(prop);
 524 }
 525
 526 int ofnode_get_child_count(ofnode parent)
 527 {
 528         ofnode child;
 529         int num = 0;
 530
 531         ofnode_for_each_subnode(child, parent)
 532                 num++;
 533
 534         return num;
 535 }
 536
 537 static int decode_timing_property(ofnode node, const char *name,
 538                                   struct timing_entry *result)
 539 {
 540         int length, ret = 0;
 541
 542         length = ofnode_read_size(node, name);
 543         if (length < 0) {
 544                 debug("%s: could not find property %s\n",
 545                       ofnode_get_name(node), name);
 546                 return length;
 547         }
 548
 549         if (length == sizeof(u32)) {
 550                 result->typ = ofnode_read_u32_default(node, name, 0);
 551                 result->min = result->typ;
 552                 result->max = result->typ;
 553         } else {
 554                 ret = ofnode_read_u32_array(node, name, &result->min, 3);
 555         }
 556
 557         return ret;
 558 }
 559
 560 int ofnode_decode_display_timing(ofnode parent, int index,
 561                                  struct display_timing *dt)
 562 {
 563         int i;
 564         ofnode timings, node;
 565         u32 val = 0;
 566         int ret = 0;
 567
 568         timings = ofnode_find_subnode(parent, "display-timings");
 569         if (!ofnode_valid(timings))
 570                 return -EINVAL;
 571
 572         i = 0;
 573         ofnode_for_each_subnode(node, timings) {
 574                 if (i++ == index)
 575                         break;
 576         }
 577
 578         if (!ofnode_valid(node))
 579                 return -EINVAL;
 580
 581         memset(dt, 0, sizeof(*dt));
 582
 583         ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch);
 584         ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch);
 585         ret |= decode_timing_property(node, "hactive", &dt->hactive);
 586         ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len);
 587         ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch);
 588         ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch);
 589         ret |= decode_timing_property(node, "vactive", &dt->vactive);
 590         ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len);
 591         ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock);
 592
 593         dt->flags = 0;
 594         val = ofnode_read_u32_default(node, "vsync-active", -1);
 595         if (val != -1) {
 596                 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
 597                                 DISPLAY_FLAGS_VSYNC_LOW;
 598         }
 599         val = ofnode_read_u32_default(node, "hsync-active", -1);
 600         if (val != -1) {
 601                 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
 602                                 DISPLAY_FLAGS_HSYNC_LOW;
 603         }
 604         val = ofnode_read_u32_default(node, "de-active", -1);
 605         if (val != -1) {
 606                 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
 607                                 DISPLAY_FLAGS_DE_LOW;
 608         }
 609         val = ofnode_read_u32_default(node, "pixelclk-active", -1);
 610         if (val != -1) {
 611                 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
 612                                 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
 613         }
 614
 615         if (ofnode_read_bool(node, "interlaced"))
 616                 dt->flags |= DISPLAY_FLAGS_INTERLACED;
 617         if (ofnode_read_bool(node, "doublescan"))
 618                 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
 619         if (ofnode_read_bool(node, "doubleclk"))
 620                 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
 621
 622         return ret;
 623 }
 624
 625 const void *ofnode_get_property(ofnode node, const char *propname, int *lenp)
 626 {
 627         if (ofnode_is_np(node))
 628                 return of_get_property(ofnode_to_np(node), propname, lenp);
 629         else
 630                 return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
 631                                    propname, lenp);
 632 }
 633
 634 int ofnode_get_first_property(ofnode node, struct ofprop *prop)
 635 {
 636         prop->node = node;
 637
 638         if (ofnode_is_np(node)) {
 639                 prop->prop = of_get_first_property(ofnode_to_np(prop->node));
 640                 if (!prop->prop)
 641                         return -FDT_ERR_NOTFOUND;
 642         } else {
 643                 prop->offset =
 644                         fdt_first_property_offset(gd->fdt_blob,
 645                                                   ofnode_to_offset(prop->node));
 646                 if (prop->offset < 0)
 647                         return prop->offset;
 648         }
 649
 650         return 0;
 651 }
 652
 653 int ofnode_get_next_property(struct ofprop *prop)
 654 {
 655         if (ofnode_is_np(prop->node)) {
 656                 prop->prop = of_get_next_property(ofnode_to_np(prop->node),
 657                                                   prop->prop);
 658                 if (!prop->prop)
 659                         return -FDT_ERR_NOTFOUND;
 660         } else {
 661                 prop->offset = fdt_next_property_offset(gd->fdt_blob,
 662                                                         prop->offset);
 663                 if (prop->offset  < 0)
 664                         return prop->offset;
 665         }
 666
 667         return 0;
 668 }
 669
 670 const void *ofnode_get_property_by_prop(const struct ofprop *prop,
 671                                         const char **propname, int *lenp)
 672 {
 673         if (ofnode_is_np(prop->node))
 674                 return of_get_property_by_prop(ofnode_to_np(prop->node),
 675                                                prop->prop, propname, lenp);
 676         else
 677                 return fdt_getprop_by_offset(gd->fdt_blob,
 678                                              prop->offset,
 679                                              propname, lenp);
 680 }
 681
 682 bool ofnode_is_available(ofnode node)
 683 {
 684         if (ofnode_is_np(node))
 685                 return of_device_is_available(ofnode_to_np(node));
 686         else
 687                 return fdtdec_get_is_enabled(gd->fdt_blob,
 688                                              ofnode_to_offset(node));
 689 }
 690
 691 fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property,
 692                                 fdt_size_t *sizep)
 693 {
 694         if (ofnode_is_np(node)) {
 695                 int na, ns;
 696                 int psize;
 697                 const struct device_node *np = ofnode_to_np(node);
 698                 const __be32 *prop = of_get_property(np, property, &psize);
 699
 700                 if (!prop)
 701                         return FDT_ADDR_T_NONE;
 702                 na = of_n_addr_cells(np);
 703                 ns = of_n_size_cells(np);
 704                 *sizep = of_read_number(prop + na, ns);
 705
 706                 if (CONFIG_IS_ENABLED(OF_TRANSLATE) &&
 707                     (ns > 0 || gd_size_cells_0())) {
 708                         return of_translate_address(np, prop);
 709                 }
 710                 else
 711                         return of_read_number(prop, na);
 712         } else {
 713                 return fdtdec_get_addr_size(gd->fdt_blob,
 714                                             ofnode_to_offset(node), property,
 715                                             sizep);
 716         }
 717 }
 718
 719 const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
 720                                         size_t sz)
 721 {
 722         if (ofnode_is_np(node)) {
 723                 const struct device_node *np = ofnode_to_np(node);
 724                 int psize;
 725                 const __be32 *prop = of_get_property(np, propname, &psize);
 726
 727                 if (!prop || sz != psize)
 728                         return NULL;
 729                 return (uint8_t *)prop;
 730
 731         } else {
 732                 return fdtdec_locate_byte_array(gd->fdt_blob,
 733                                 ofnode_to_offset(node), propname, sz);
 734         }
 735 }
 736
 737 int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
 738                          const char *propname, struct fdt_pci_addr *addr)
 739 {
 740         const fdt32_t *cell;
 741         int len;
 742         int ret = -ENOENT;
 743
 744         debug("%s: %s: ", __func__, propname);
 745
 746         /*
 747          * If we follow the pci bus bindings strictly, we should check
 748          * the value of the node's parent node's #address-cells and
 749          * #size-cells. They need to be 3 and 2 accordingly. However,
 750          * for simplicity we skip the check here.
 751          */
 752         cell = ofnode_get_property(node, propname, &len);
 753         if (!cell)
 754                 goto fail;
 755
 756         if ((len % FDT_PCI_REG_SIZE) == 0) {
 757                 int num = len / FDT_PCI_REG_SIZE;
 758                 int i;
 759
 760                 for (i = 0; i < num; i++) {
 761                         debug("pci address #%d: %08lx %08lx %08lx\n", i,
 762                               (ulong)fdt32_to_cpu(cell[0]),
 763                               (ulong)fdt32_to_cpu(cell[1]),
 764                               (ulong)fdt32_to_cpu(cell[2]));
 765                         if ((fdt32_to_cpu(*cell) & type) == type) {
 766                                 addr->phys_hi = fdt32_to_cpu(cell[0]);
 767                                 addr->phys_mid = fdt32_to_cpu(cell[1]);
 768                                 addr->phys_lo = fdt32_to_cpu(cell[2]);
 769                                 break;
 770                         }
 771
 772                         cell += (FDT_PCI_ADDR_CELLS +
 773                                  FDT_PCI_SIZE_CELLS);
 774                 }
 775
 776                 if (i == num) {
 777                         ret = -ENXIO;
 778                         goto fail;
 779                 }
 780
 781                 return 0;
 782         }
 783
 784         ret = -EINVAL;
 785
 786 fail:
 787         debug("(not found)\n");
 788         return ret;
 789 }
 790
 791 int ofnode_read_pci_vendev(ofnode node, u16 *vendor, u16 *device)
 792 {
 793         const char *list, *end;
 794         int len;
 795
 796         list = ofnode_get_property(node, "compatible", &len);
 797         if (!list)
 798                 return -ENOENT;
 799
 800         end = list + len;
 801         while (list < end) {
 802                 len = strlen(list);
 803                 if (len >= strlen("pciVVVV,DDDD")) {
 804                         char *s = strstr(list, "pci");
 805
 806                         /*
 807                          * check if the string is something like pciVVVV,DDDD.RR
 808                          * or just pciVVVV,DDDD
 809                          */
 810                         if (s && s[7] == ',' &&
 811                             (s[12] == '.' || s[12] == 0)) {
 812                                 s += 3;
 813                                 *vendor = simple_strtol(s, NULL, 16);
 814
 815                                 s += 5;
 816                                 *device = simple_strtol(s, NULL, 16);
 817
 818                                 return 0;
 819                         }
 820                 }
 821                 list += (len + 1);
 822         }
 823
 824         return -ENOENT;
 825 }
 826
 827 int ofnode_read_addr_cells(ofnode node)
 828 {
 829         if (ofnode_is_np(node)) {
 830                 return of_n_addr_cells(ofnode_to_np(node));
 831         } else {
 832                 int parent = fdt_parent_offset(gd->fdt_blob,
 833                                                ofnode_to_offset(node));
 834
 835                 return fdt_address_cells(gd->fdt_blob, parent);
 836         }
 837 }
 838
 839 int ofnode_read_size_cells(ofnode node)
 840 {
 841         if (ofnode_is_np(node)) {
 842                 return of_n_size_cells(ofnode_to_np(node));
 843         } else {
 844                 int parent = fdt_parent_offset(gd->fdt_blob,
 845                                                ofnode_to_offset(node));
 846
 847                 return fdt_size_cells(gd->fdt_blob, parent);
 848         }
 849 }
 850
 851 int ofnode_read_simple_addr_cells(ofnode node)
 852 {
 853         if (ofnode_is_np(node))
 854                 return of_simple_addr_cells(ofnode_to_np(node));
 855         else
 856                 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
 857 }
 858
 859 int ofnode_read_simple_size_cells(ofnode node)
 860 {
 861         if (ofnode_is_np(node))
 862                 return of_simple_size_cells(ofnode_to_np(node));
 863         else
 864                 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
 865 }
 866
 867 bool ofnode_pre_reloc(ofnode node)
 868 {
 869 #if defined(CONFIG_SPL_BUILD) || defined(CONFIG_TPL_BUILD)
 870         /* for SPL and TPL the remaining nodes after the fdtgrep 1st pass
 871          * had property dm-pre-reloc or u-boot,dm-spl/tpl.
 872          * They are removed in final dtb (fdtgrep 2nd pass)
 873          */
 874         return true;
 875 #else
 876         if (ofnode_read_bool(node, "u-boot,dm-pre-reloc"))
 877                 return true;
 878         if (ofnode_read_bool(node, "u-boot,dm-pre-proper"))
 879                 return true;
 880
 881         /*
 882          * In regular builds individual spl and tpl handling both
 883          * count as handled pre-relocation for later second init.
 884          */
 885         if (ofnode_read_bool(node, "u-boot,dm-spl") ||
 886             ofnode_read_bool(node, "u-boot,dm-tpl"))
 887                 return true;
 888
 889         return false;
 890 #endif
 891 }
 892
 893 int ofnode_read_resource(ofnode node, uint index, struct resource *res)
 894 {
 895         if (ofnode_is_np(node)) {
 896                 return of_address_to_resource(ofnode_to_np(node), index, res);
 897         } else {
 898                 struct fdt_resource fres;
 899                 int ret;
 900
 901                 ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node),
 902                                        "reg", index, &fres);
 903                 if (ret < 0)
 904                         return -EINVAL;
 905                 memset(res, '\0', sizeof(*res));
 906                 res->start = fres.start;
 907                 res->end = fres.end;
 908
 909                 return 0;
 910         }
 911 }
 912
 913 int ofnode_read_resource_byname(ofnode node, const char *name,
 914                                 struct resource *res)
 915 {
 916         int index;
 917
 918         index = ofnode_stringlist_search(node, "reg-names", name);
 919         if (index < 0)
 920                 return index;
 921
 922         return ofnode_read_resource(node, index, res);
 923 }
 924
 925 u64 ofnode_translate_address(ofnode node, const fdt32_t *in_addr)
 926 {
 927         if (ofnode_is_np(node))
 928                 return of_translate_address(ofnode_to_np(node), in_addr);
 929         else
 930                 return fdt_translate_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
 931 }
 932
 933 u64 ofnode_translate_dma_address(ofnode node, const fdt32_t *in_addr)
 934 {
 935         if (ofnode_is_np(node))
 936                 return of_translate_dma_address(ofnode_to_np(node), in_addr);
 937         else
 938                 return fdt_translate_dma_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
 939 }
 940
 941 int ofnode_get_dma_range(ofnode node, phys_addr_t *cpu, dma_addr_t *bus, u64 *size)
 942 {
 943         if (ofnode_is_np(node))
 944                 return of_get_dma_range(ofnode_to_np(node), cpu, bus, size);
 945         else
 946                 return fdt_get_dma_range(gd->fdt_blob, ofnode_to_offset(node),
 947                                          cpu, bus, size);
 948 }
 949
 950 int ofnode_device_is_compatible(ofnode node, const char *compat)
 951 {
 952         if (ofnode_is_np(node))
 953                 return of_device_is_compatible(ofnode_to_np(node), compat,
 954                                                NULL, NULL);
 955         else
 956                 return !fdt_node_check_compatible(gd->fdt_blob,
 957                                                   ofnode_to_offset(node),
 958                                                   compat);
 959 }
 960
 961 ofnode ofnode_by_compatible(ofnode from, const char *compat)
 962 {
 963         if (of_live_active()) {
 964                 return np_to_ofnode(of_find_compatible_node(
 965                         (struct device_node *)ofnode_to_np(from), NULL,
 966                         compat));
 967         } else {
 968                 return offset_to_ofnode(fdt_node_offset_by_compatible(
 969                                 gd->fdt_blob, ofnode_to_offset(from), compat));
 970         }
 971 }
 972
 973 ofnode ofnode_by_prop_value(ofnode from, const char *propname,
 974                             const void *propval, int proplen)
 975 {
 976         if (of_live_active()) {
 977                 return np_to_ofnode(of_find_node_by_prop_value(
 978                         (struct device_node *)ofnode_to_np(from), propname,
 979                         propval, proplen));
 980         } else {
 981                 return offset_to_ofnode(fdt_node_offset_by_prop_value(
 982                                 gd->fdt_blob, ofnode_to_offset(from),
 983                                 propname, propval, proplen));
 984         }
 985 }
 986
 987 int ofnode_write_prop(ofnode node, const char *propname, int len,
 988                       const void *value)
 989 {
 990         const struct device_node *np = ofnode_to_np(node);
 991         struct property *pp;
 992         struct property *pp_last = NULL;
 993         struct property *new;
 994
 995         if (!of_live_active())
 996                 return -ENOSYS;
 997
 998         if (!np)
 999                 return -EINVAL;
1000
1001         for (pp = np->properties; pp; pp = pp->next) {
1002                 if (strcmp(pp->name, propname) == 0) {
1003                         /* Property exists -> change value */
1004                         pp->value = (void *)value;
1005                         pp->length = len;
1006                         return 0;
1007                 }
1008                 pp_last = pp;
1009         }
1010
1011         if (!pp_last)
1012                 return -ENOENT;
1013
1014         /* Property does not exist -> append new property */
1015         new = malloc(sizeof(struct property));
1016         if (!new)
1017                 return -ENOMEM;
1018
1019         new->name = strdup(propname);
1020         if (!new->name) {
1021                 free(new);
1022                 return -ENOMEM;
1023         }
1024
1025         new->value = (void *)value;
1026         new->length = len;
1027         new->next = NULL;
1028
1029         pp_last->next = new;
1030
1031         return 0;
1032 }
1033
1034 int ofnode_write_string(ofnode node, const char *propname, const char *value)
1035 {
1036         if (!of_live_active())
1037                 return -ENOSYS;
1038
1039         assert(ofnode_valid(node));
1040
1041         debug("%s: %s = %s", __func__, propname, value);
1042
1043         return ofnode_write_prop(node, propname, strlen(value) + 1, value);
1044 }
1045
1046 int ofnode_set_enabled(ofnode node, bool value)
1047 {
1048         if (!of_live_active())
1049                 return -ENOSYS;
1050
1051         assert(ofnode_valid(node));
1052
1053         if (value)
1054                 return ofnode_write_string(node, "status", "okay");
1055         else
1056                 return ofnode_write_string(node, "status", "disabled");
1057 }