cmd/fdt.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2007
   4  * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
   5  * Based on code written by:
   6  *   Pantelis Antoniou <pantelis.antoniou@gmail.com> and
   7  *   Matthew McClintock <msm@freescale.com>
   8  */
   9
  10 #include <common.h>
  11 #include <command.h>
  12 #include <env.h>
  13 #include <image.h>
  14 #include <linux/ctype.h>
  15 #include <linux/types.h>
  16 #include <asm/global_data.h>
  17 #include <linux/libfdt.h>
  18 #include <fdt_support.h>
  19 #include <mapmem.h>
  20 #include <asm/io.h>
  21
  22 #define MAX_LEVEL       32              /* how deeply nested we will go */
  23 #define SCRATCHPAD      1024            /* bytes of scratchpad memory */
  24
  25 /*
  26  * Global data (for the gd->bd)
  27  */
  28 DECLARE_GLOBAL_DATA_PTR;
  29
  30 static int fdt_parse_prop(char *const*newval, int count, char *data, int *len);
  31 static int fdt_print(const char *pathp, char *prop, int depth);
  32 static int is_printable_string(const void *data, int len);
  33
  34 /*
  35  * The working_fdt points to our working flattened device tree.
  36  */
  37 struct fdt_header *working_fdt;
  38
  39 void set_working_fdt_addr(ulong addr)
  40 {
  41         void *buf;
  42
  43         buf = map_sysmem(addr, 0);
  44         working_fdt = buf;
  45         env_set_hex("fdtaddr", addr);
  46 }
  47
  48 /*
  49  * Get a value from the fdt and format it to be set in the environment
  50  */
  51 static int fdt_value_env_set(const void *nodep, int len, const char *var)
  52 {
  53         if (is_printable_string(nodep, len))
  54                 env_set(var, (void *)nodep);
  55         else if (len == 4) {
  56                 char buf[11];
  57
  58                 sprintf(buf, "0x%08X", fdt32_to_cpu(*(fdt32_t *)nodep));
  59                 env_set(var, buf);
  60         } else if (len%4 == 0 && len <= 20) {
  61                 /* Needed to print things like sha1 hashes. */
  62                 char buf[41];
  63                 int i;
  64
  65                 for (i = 0; i < len; i += sizeof(unsigned int))
  66                         sprintf(buf + (i * 2), "%08x",
  67                                 *(unsigned int *)(nodep + i));
  68                 env_set(var, buf);
  69         } else {
  70                 printf("error: unprintable value\n");
  71                 return 1;
  72         }
  73         return 0;
  74 }
  75
  76 static const char * const fdt_member_table[] = {
  77         "magic",
  78         "totalsize",
  79         "off_dt_struct",
  80         "off_dt_strings",
  81         "off_mem_rsvmap",
  82         "version",
  83         "last_comp_version",
  84         "boot_cpuid_phys",
  85         "size_dt_strings",
  86         "size_dt_struct",
  87 };
  88
  89 static int fdt_get_header_value(int argc, char *const argv[])
  90 {
  91         fdt32_t *fdtp = (fdt32_t *)working_fdt;
  92         ulong val;
  93         int i;
  94
  95         if (argv[2][0] != 'g')
  96                 return CMD_RET_FAILURE;
  97
  98         for (i = 0; i < ARRAY_SIZE(fdt_member_table); i++) {
  99                 if (strcmp(fdt_member_table[i], argv[4]))
 100                         continue;
 101
 102                 val = fdt32_to_cpu(fdtp[i]);
 103                 env_set_hex(argv[3], val);
 104                 return CMD_RET_SUCCESS;
 105         }
 106
 107         return CMD_RET_FAILURE;
 108 }
 109
 110 /*
 111  * Flattened Device Tree command, see the help for parameter definitions.
 112  */
 113 static int do_fdt(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 114 {
 115         if (argc < 2)
 116                 return CMD_RET_USAGE;
 117
 118         /*
 119          * Set the address of the fdt
 120          */
 121         if (strncmp(argv[1], "ad", 2) == 0) {
 122                 unsigned long addr;
 123                 int control = 0;
 124                 struct fdt_header *blob;
 125                 /*
 126                  * Set the address [and length] of the fdt.
 127                  */
 128                 argc -= 2;
 129                 argv += 2;
 130 /* Temporary #ifdef - some archs don't have fdt_blob yet */
 131 #ifdef CONFIG_OF_CONTROL
 132                 if (argc && !strcmp(*argv, "-c")) {
 133                         control = 1;
 134                         argc--;
 135                         argv++;
 136                 }
 137 #endif
 138                 if (argc == 0) {
 139                         if (control)
 140                                 blob = (struct fdt_header *)gd->fdt_blob;
 141                         else
 142                                 blob = working_fdt;
 143                         if (!blob || !fdt_valid(&blob))
 144                                 return 1;
 145                         printf("The address of the fdt is %#08lx\n",
 146                                control ? (ulong)map_to_sysmem(blob) :
 147                                         env_get_hex("fdtaddr", 0));
 148                         return 0;
 149                 }
 150
 151                 addr = simple_strtoul(argv[0], NULL, 16);
 152                 blob = map_sysmem(addr, 0);
 153                 if (!fdt_valid(&blob))
 154                         return 1;
 155                 if (control)
 156                         gd->fdt_blob = blob;
 157                 else
 158                         set_working_fdt_addr(addr);
 159
 160                 if (argc >= 2) {
 161                         int  len;
 162                         int  err;
 163                         /*
 164                          * Optional new length
 165                          */
 166                         len = simple_strtoul(argv[1], NULL, 16);
 167                         if (len < fdt_totalsize(blob)) {
 168                                 printf ("New length %d < existing length %d, "
 169                                         "ignoring.\n",
 170                                         len, fdt_totalsize(blob));
 171                         } else {
 172                                 /*
 173                                  * Open in place with a new length.
 174                                  */
 175                                 err = fdt_open_into(blob, blob, len);
 176                                 if (err != 0) {
 177                                         printf ("libfdt fdt_open_into(): %s\n",
 178                                                 fdt_strerror(err));
 179                                 }
 180                         }
 181                 }
 182
 183                 return CMD_RET_SUCCESS;
 184         }
 185
 186         if (!working_fdt) {
 187                 puts(
 188                         "No FDT memory address configured. Please configure\n"
 189                         "the FDT address via \"fdt addr <address>\" command.\n"
 190                         "Aborting!\n");
 191                 return CMD_RET_FAILURE;
 192         }
 193
 194         /*
 195          * Move the working_fdt
 196          */
 197         if (strncmp(argv[1], "mo", 2) == 0) {
 198                 struct fdt_header *newaddr;
 199                 int  len;
 200                 int  err;
 201
 202                 if (argc < 4)
 203                         return CMD_RET_USAGE;
 204
 205                 /*
 206                  * Set the address and length of the fdt.
 207                  */
 208                 working_fdt = (struct fdt_header *)simple_strtoul(argv[2], NULL, 16);
 209                 if (!fdt_valid(&working_fdt))
 210                         return 1;
 211
 212                 newaddr = (struct fdt_header *)simple_strtoul(argv[3],NULL,16);
 213
 214                 /*
 215                  * If the user specifies a length, use that.  Otherwise use the
 216                  * current length.
 217                  */
 218                 if (argc <= 4) {
 219                         len = fdt_totalsize(working_fdt);
 220                 } else {
 221                         len = simple_strtoul(argv[4], NULL, 16);
 222                         if (len < fdt_totalsize(working_fdt)) {
 223                                 printf ("New length 0x%X < existing length "
 224                                         "0x%X, aborting.\n",
 225                                         len, fdt_totalsize(working_fdt));
 226                                 return 1;
 227                         }
 228                 }
 229
 230                 /*
 231                  * Copy to the new location.
 232                  */
 233                 err = fdt_open_into(working_fdt, newaddr, len);
 234                 if (err != 0) {
 235                         printf ("libfdt fdt_open_into(): %s\n",
 236                                 fdt_strerror(err));
 237                         return 1;
 238                 }
 239                 set_working_fdt_addr((ulong)newaddr);
 240 #ifdef CONFIG_OF_SYSTEM_SETUP
 241         /* Call the board-specific fixup routine */
 242         } else if (strncmp(argv[1], "sys", 3) == 0) {
 243                 int err = ft_system_setup(working_fdt, gd->bd);
 244
 245                 if (err) {
 246                         printf("Failed to add system information to FDT: %s\n",
 247                                fdt_strerror(err));
 248                         return CMD_RET_FAILURE;
 249                 }
 250 #endif
 251         /*
 252          * Make a new node
 253          */
 254         } else if (strncmp(argv[1], "mk", 2) == 0) {
 255                 char *pathp;            /* path */
 256                 char *nodep;            /* new node to add */
 257                 int  nodeoffset;        /* node offset from libfdt */
 258                 int  err;
 259
 260                 /*
 261                  * Parameters: Node path, new node to be appended to the path.
 262                  */
 263                 if (argc < 4)
 264                         return CMD_RET_USAGE;
 265
 266                 pathp = argv[2];
 267                 nodep = argv[3];
 268
 269                 nodeoffset = fdt_path_offset (working_fdt, pathp);
 270                 if (nodeoffset < 0) {
 271                         /*
 272                          * Not found or something else bad happened.
 273                          */
 274                         printf ("libfdt fdt_path_offset() returned %s\n",
 275                                 fdt_strerror(nodeoffset));
 276                         return 1;
 277                 }
 278                 err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
 279                 if (err < 0) {
 280                         printf ("libfdt fdt_add_subnode(): %s\n",
 281                                 fdt_strerror(err));
 282                         return 1;
 283                 }
 284
 285         /*
 286          * Set the value of a property in the working_fdt.
 287          */
 288         } else if (strncmp(argv[1], "se", 2) == 0) {
 289                 char *pathp;            /* path */
 290                 char *prop;             /* property */
 291                 int  nodeoffset;        /* node offset from libfdt */
 292                 static char data[SCRATCHPAD] __aligned(4);/* property storage */
 293                 const void *ptmp;
 294                 int  len;               /* new length of the property */
 295                 int  ret;               /* return value */
 296
 297                 /*
 298                  * Parameters: Node path, property, optional value.
 299                  */
 300                 if (argc < 4)
 301                         return CMD_RET_USAGE;
 302
 303                 pathp  = argv[2];
 304                 prop   = argv[3];
 305
 306                 nodeoffset = fdt_path_offset (working_fdt, pathp);
 307                 if (nodeoffset < 0) {
 308                         /*
 309                          * Not found or something else bad happened.
 310                          */
 311                         printf ("libfdt fdt_path_offset() returned %s\n",
 312                                 fdt_strerror(nodeoffset));
 313                         return 1;
 314                 }
 315
 316                 if (argc == 4) {
 317                         len = 0;
 318                 } else {
 319                         ptmp = fdt_getprop(working_fdt, nodeoffset, prop, &len);
 320                         if (len > SCRATCHPAD) {
 321                                 printf("prop (%d) doesn't fit in scratchpad!\n",
 322                                        len);
 323                                 return 1;
 324                         }
 325                         if (ptmp != NULL)
 326                                 memcpy(data, ptmp, len);
 327
 328                         ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
 329                         if (ret != 0)
 330                                 return ret;
 331                 }
 332
 333                 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
 334                 if (ret < 0) {
 335                         printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
 336                         return 1;
 337                 }
 338
 339         /********************************************************************
 340          * Get the value of a property in the working_fdt.
 341          ********************************************************************/
 342         } else if (argv[1][0] == 'g') {
 343                 char *subcmd;           /* sub-command */
 344                 char *pathp;            /* path */
 345                 char *prop;             /* property */
 346                 char *var;              /* variable to store result */
 347                 int  nodeoffset;        /* node offset from libfdt */
 348                 const void *nodep;      /* property node pointer */
 349                 int  len = 0;           /* new length of the property */
 350
 351                 /*
 352                  * Parameters: Node path, property, optional value.
 353                  */
 354                 if (argc < 5)
 355                         return CMD_RET_USAGE;
 356
 357                 subcmd = argv[2];
 358
 359                 if (argc < 6 && subcmd[0] != 's')
 360                         return CMD_RET_USAGE;
 361
 362                 var    = argv[3];
 363                 pathp  = argv[4];
 364                 prop   = argv[5];
 365
 366                 nodeoffset = fdt_path_offset(working_fdt, pathp);
 367                 if (nodeoffset < 0) {
 368                         /*
 369                          * Not found or something else bad happened.
 370                          */
 371                         printf("libfdt fdt_path_offset() returned %s\n",
 372                                 fdt_strerror(nodeoffset));
 373                         return 1;
 374                 }
 375
 376                 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
 377                         int reqIndex = -1;
 378                         int startDepth = fdt_node_depth(
 379                                 working_fdt, nodeoffset);
 380                         int curDepth = startDepth;
 381                         int curIndex = -1;
 382                         int nextNodeOffset = fdt_next_node(
 383                                 working_fdt, nodeoffset, &curDepth);
 384
 385                         if (subcmd[0] == 'n')
 386                                 reqIndex = simple_strtoul(argv[5], NULL, 16);
 387
 388                         while (curDepth > startDepth) {
 389                                 if (curDepth == startDepth + 1)
 390                                         curIndex++;
 391                                 if (subcmd[0] == 'n' && curIndex == reqIndex) {
 392                                         const char *node_name;
 393
 394                                         node_name = fdt_get_name(working_fdt,
 395                                                                  nextNodeOffset,
 396                                                                  NULL);
 397                                         env_set(var, node_name);
 398                                         return 0;
 399                                 }
 400                                 nextNodeOffset = fdt_next_node(
 401                                         working_fdt, nextNodeOffset, &curDepth);
 402                                 if (nextNodeOffset < 0)
 403                                         break;
 404                         }
 405                         if (subcmd[0] == 's') {
 406                                 /* get the num nodes at this level */
 407                                 env_set_ulong(var, curIndex + 1);
 408                         } else {
 409                                 /* node index not found */
 410                                 printf("libfdt node not found\n");
 411                                 return 1;
 412                         }
 413                 } else {
 414                         nodep = fdt_getprop(
 415                                 working_fdt, nodeoffset, prop, &len);
 416                         if (len == 0) {
 417                                 /* no property value */
 418                                 env_set(var, "");
 419                                 return 0;
 420                         } else if (nodep && len > 0) {
 421                                 if (subcmd[0] == 'v') {
 422                                         int ret;
 423
 424                                         ret = fdt_value_env_set(nodep, len,
 425                                                                 var);
 426                                         if (ret != 0)
 427                                                 return ret;
 428                                 } else if (subcmd[0] == 'a') {
 429                                         /* Get address */
 430                                         char buf[11];
 431
 432                                         sprintf(buf, "0x%p", nodep);
 433                                         env_set(var, buf);
 434                                 } else if (subcmd[0] == 's') {
 435                                         /* Get size */
 436                                         char buf[11];
 437
 438                                         sprintf(buf, "0x%08X", len);
 439                                         env_set(var, buf);
 440                                 } else
 441                                         return CMD_RET_USAGE;
 442                                 return 0;
 443                         } else {
 444                                 printf("libfdt fdt_getprop(): %s\n",
 445                                         fdt_strerror(len));
 446                                 return 1;
 447                         }
 448                 }
 449
 450         /*
 451          * Print (recursive) / List (single level)
 452          */
 453         } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
 454                 int depth = MAX_LEVEL;  /* how deep to print */
 455                 char *pathp;            /* path */
 456                 char *prop;             /* property */
 457                 int  ret;               /* return value */
 458                 static char root[2] = "/";
 459
 460                 /*
 461                  * list is an alias for print, but limited to 1 level
 462                  */
 463                 if (argv[1][0] == 'l') {
 464                         depth = 1;
 465                 }
 466
 467                 /*
 468                  * Get the starting path.  The root node is an oddball,
 469                  * the offset is zero and has no name.
 470                  */
 471                 if (argc == 2)
 472                         pathp = root;
 473                 else
 474                         pathp = argv[2];
 475                 if (argc > 3)
 476                         prop = argv[3];
 477                 else
 478                         prop = NULL;
 479
 480                 ret = fdt_print(pathp, prop, depth);
 481                 if (ret != 0)
 482                         return ret;
 483
 484         /*
 485          * Remove a property/node
 486          */
 487         } else if (strncmp(argv[1], "rm", 2) == 0) {
 488                 int  nodeoffset;        /* node offset from libfdt */
 489                 int  err;
 490
 491                 /*
 492                  * Get the path.  The root node is an oddball, the offset
 493                  * is zero and has no name.
 494                  */
 495                 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
 496                 if (nodeoffset < 0) {
 497                         /*
 498                          * Not found or something else bad happened.
 499                          */
 500                         printf ("libfdt fdt_path_offset() returned %s\n",
 501                                 fdt_strerror(nodeoffset));
 502                         return 1;
 503                 }
 504                 /*
 505                  * Do the delete.  A fourth parameter means delete a property,
 506                  * otherwise delete the node.
 507                  */
 508                 if (argc > 3) {
 509                         err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
 510                         if (err < 0) {
 511                                 printf("libfdt fdt_delprop():  %s\n",
 512                                         fdt_strerror(err));
 513                                 return err;
 514                         }
 515                 } else {
 516                         err = fdt_del_node(working_fdt, nodeoffset);
 517                         if (err < 0) {
 518                                 printf("libfdt fdt_del_node():  %s\n",
 519                                         fdt_strerror(err));
 520                                 return err;
 521                         }
 522                 }
 523
 524         /*
 525          * Display header info
 526          */
 527         } else if (argv[1][0] == 'h') {
 528                 if (argc == 5)
 529                         return fdt_get_header_value(argc, argv);
 530
 531                 u32 version = fdt_version(working_fdt);
 532                 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
 533                 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
 534                        fdt_totalsize(working_fdt));
 535                 printf("off_dt_struct:\t\t0x%x\n",
 536                        fdt_off_dt_struct(working_fdt));
 537                 printf("off_dt_strings:\t\t0x%x\n",
 538                        fdt_off_dt_strings(working_fdt));
 539                 printf("off_mem_rsvmap:\t\t0x%x\n",
 540                        fdt_off_mem_rsvmap(working_fdt));
 541                 printf("version:\t\t%d\n", version);
 542                 printf("last_comp_version:\t%d\n",
 543                        fdt_last_comp_version(working_fdt));
 544                 if (version >= 2)
 545                         printf("boot_cpuid_phys:\t0x%x\n",
 546                                 fdt_boot_cpuid_phys(working_fdt));
 547                 if (version >= 3)
 548                         printf("size_dt_strings:\t0x%x\n",
 549                                 fdt_size_dt_strings(working_fdt));
 550                 if (version >= 17)
 551                         printf("size_dt_struct:\t\t0x%x\n",
 552                                 fdt_size_dt_struct(working_fdt));
 553                 printf("number mem_rsv:\t\t0x%x\n",
 554                        fdt_num_mem_rsv(working_fdt));
 555                 printf("\n");
 556
 557         /*
 558          * Set boot cpu id
 559          */
 560         } else if (strncmp(argv[1], "boo", 3) == 0) {
 561                 unsigned long tmp = simple_strtoul(argv[2], NULL, 16);
 562                 fdt_set_boot_cpuid_phys(working_fdt, tmp);
 563
 564         /*
 565          * memory command
 566          */
 567         } else if (strncmp(argv[1], "me", 2) == 0) {
 568                 uint64_t addr, size;
 569                 int err;
 570                 addr = simple_strtoull(argv[2], NULL, 16);
 571                 size = simple_strtoull(argv[3], NULL, 16);
 572                 err = fdt_fixup_memory(working_fdt, addr, size);
 573                 if (err < 0)
 574                         return err;
 575
 576         /*
 577          * mem reserve commands
 578          */
 579         } else if (strncmp(argv[1], "rs", 2) == 0) {
 580                 if (argv[2][0] == 'p') {
 581                         uint64_t addr, size;
 582                         int total = fdt_num_mem_rsv(working_fdt);
 583                         int j, err;
 584                         printf("index\t\t   start\t\t    size\n");
 585                         printf("-------------------------------"
 586                                 "-----------------\n");
 587                         for (j = 0; j < total; j++) {
 588                                 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
 589                                 if (err < 0) {
 590                                         printf("libfdt fdt_get_mem_rsv():  %s\n",
 591                                                         fdt_strerror(err));
 592                                         return err;
 593                                 }
 594                                 printf("    %x\t%08x%08x\t%08x%08x\n", j,
 595                                         (u32)(addr >> 32),
 596                                         (u32)(addr & 0xffffffff),
 597                                         (u32)(size >> 32),
 598                                         (u32)(size & 0xffffffff));
 599                         }
 600                 } else if (argv[2][0] == 'a') {
 601                         uint64_t addr, size;
 602                         int err;
 603                         addr = simple_strtoull(argv[3], NULL, 16);
 604                         size = simple_strtoull(argv[4], NULL, 16);
 605                         err = fdt_add_mem_rsv(working_fdt, addr, size);
 606
 607                         if (err < 0) {
 608                                 printf("libfdt fdt_add_mem_rsv():  %s\n",
 609                                         fdt_strerror(err));
 610                                 return err;
 611                         }
 612                 } else if (argv[2][0] == 'd') {
 613                         unsigned long idx = simple_strtoul(argv[3], NULL, 16);
 614                         int err = fdt_del_mem_rsv(working_fdt, idx);
 615
 616                         if (err < 0) {
 617                                 printf("libfdt fdt_del_mem_rsv():  %s\n",
 618                                         fdt_strerror(err));
 619                                 return err;
 620                         }
 621                 } else {
 622                         /* Unrecognized command */
 623                         return CMD_RET_USAGE;
 624                 }
 625         }
 626 #ifdef CONFIG_OF_BOARD_SETUP
 627         /* Call the board-specific fixup routine */
 628         else if (strncmp(argv[1], "boa", 3) == 0) {
 629                 int err = ft_board_setup(working_fdt, gd->bd);
 630
 631                 if (err) {
 632                         printf("Failed to update board information in FDT: %s\n",
 633                                fdt_strerror(err));
 634                         return CMD_RET_FAILURE;
 635                 }
 636 #ifdef CONFIG_SOC_KEYSTONE
 637                 ft_board_setup_ex(working_fdt, gd->bd);
 638 #endif
 639         }
 640 #endif
 641         /* Create a chosen node */
 642         else if (strncmp(argv[1], "cho", 3) == 0) {
 643                 unsigned long initrd_start = 0, initrd_end = 0;
 644
 645                 if ((argc != 2) && (argc != 4))
 646                         return CMD_RET_USAGE;
 647
 648                 if (argc == 4) {
 649                         initrd_start = simple_strtoul(argv[2], NULL, 16);
 650                         initrd_end = simple_strtoul(argv[3], NULL, 16);
 651                 }
 652
 653                 fdt_chosen(working_fdt);
 654                 fdt_initrd(working_fdt, initrd_start, initrd_end);
 655
 656 #if defined(CONFIG_FIT_SIGNATURE)
 657         } else if (strncmp(argv[1], "che", 3) == 0) {
 658                 int cfg_noffset;
 659                 int ret;
 660                 unsigned long addr;
 661                 struct fdt_header *blob;
 662
 663                 if (!working_fdt)
 664                         return CMD_RET_FAILURE;
 665
 666                 if (argc > 2) {
 667                         addr = simple_strtoul(argv[2], NULL, 16);
 668                         blob = map_sysmem(addr, 0);
 669                 } else {
 670                         blob = (struct fdt_header *)gd->fdt_blob;
 671                 }
 672                 if (!fdt_valid(&blob))
 673                         return 1;
 674
 675                 gd->fdt_blob = blob;
 676                 cfg_noffset = fit_conf_get_node(working_fdt, NULL);
 677                 if (!cfg_noffset) {
 678                         printf("Could not find configuration node: %s\n",
 679                                fdt_strerror(cfg_noffset));
 680                         return CMD_RET_FAILURE;
 681                 }
 682
 683                 ret = fit_config_verify(working_fdt, cfg_noffset);
 684                 if (ret == 0)
 685                         return CMD_RET_SUCCESS;
 686                 else
 687                         return CMD_RET_FAILURE;
 688 #endif
 689
 690         }
 691 #ifdef CONFIG_OF_LIBFDT_OVERLAY
 692         /* apply an overlay */
 693         else if (strncmp(argv[1], "ap", 2) == 0) {
 694                 unsigned long addr;
 695                 struct fdt_header *blob;
 696                 int ret;
 697
 698                 if (argc != 3)
 699                         return CMD_RET_USAGE;
 700
 701                 if (!working_fdt)
 702                         return CMD_RET_FAILURE;
 703
 704                 addr = simple_strtoul(argv[2], NULL, 16);
 705                 blob = map_sysmem(addr, 0);
 706                 if (!fdt_valid(&blob))
 707                         return CMD_RET_FAILURE;
 708
 709                 /* apply method prints messages on error */
 710                 ret = fdt_overlay_apply_verbose(working_fdt, blob);
 711                 if (ret)
 712                         return CMD_RET_FAILURE;
 713         }
 714 #endif
 715         /* resize the fdt */
 716         else if (strncmp(argv[1], "re", 2) == 0) {
 717                 uint extrasize;
 718                 if (argc > 2)
 719                         extrasize = simple_strtoul(argv[2], NULL, 16);
 720                 else
 721                         extrasize = 0;
 722                 fdt_shrink_to_minimum(working_fdt, extrasize);
 723         }
 724         else {
 725                 /* Unrecognized command */
 726                 return CMD_RET_USAGE;
 727         }
 728
 729         return 0;
 730 }
 731
 732 /****************************************************************************/
 733
 734 /*
 735  * Parse the user's input, partially heuristic.  Valid formats:
 736  * <0x00112233 4 05>    - an array of cells.  Numbers follow standard
 737  *                      C conventions.
 738  * [00 11 22 .. nn] - byte stream
 739  * "string"     - If the the value doesn't start with "<" or "[", it is
 740  *                      treated as a string.  Note that the quotes are
 741  *                      stripped by the parser before we get the string.
 742  * newval: An array of strings containing the new property as specified
 743  *      on the command line
 744  * count: The number of strings in the array
 745  * data: A bytestream to be placed in the property
 746  * len: The length of the resulting bytestream
 747  */
 748 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
 749 {
 750         char *cp;               /* temporary char pointer */
 751         char *newp;             /* temporary newval char pointer */
 752         unsigned long tmp;      /* holds converted values */
 753         int stridx = 0;
 754
 755         *len = 0;
 756         newp = newval[0];
 757
 758         /* An array of cells */
 759         if (*newp == '<') {
 760                 newp++;
 761                 while ((*newp != '>') && (stridx < count)) {
 762                         /*
 763                          * Keep searching until we find that last ">"
 764                          * That way users don't have to escape the spaces
 765                          */
 766                         if (*newp == '\0') {
 767                                 newp = newval[++stridx];
 768                                 continue;
 769                         }
 770
 771                         cp = newp;
 772                         tmp = simple_strtoul(cp, &newp, 0);
 773                         if (*cp != '?')
 774                                 *(fdt32_t *)data = cpu_to_fdt32(tmp);
 775                         else
 776                                 newp++;
 777
 778                         data  += 4;
 779                         *len += 4;
 780
 781                         /* If the ptr didn't advance, something went wrong */
 782                         if ((newp - cp) <= 0) {
 783                                 printf("Sorry, I could not convert \"%s\"\n",
 784                                         cp);
 785                                 return 1;
 786                         }
 787
 788                         while (*newp == ' ')
 789                                 newp++;
 790                 }
 791
 792                 if (*newp != '>') {
 793                         printf("Unexpected character '%c'\n", *newp);
 794                         return 1;
 795                 }
 796         } else if (*newp == '[') {
 797                 /*
 798                  * Byte stream.  Convert the values.
 799                  */
 800                 newp++;
 801                 while ((stridx < count) && (*newp != ']')) {
 802                         while (*newp == ' ')
 803                                 newp++;
 804                         if (*newp == '\0') {
 805                                 newp = newval[++stridx];
 806                                 continue;
 807                         }
 808                         if (!isxdigit(*newp))
 809                                 break;
 810                         tmp = simple_strtoul(newp, &newp, 16);
 811                         *data++ = tmp & 0xFF;
 812                         *len    = *len + 1;
 813                 }
 814                 if (*newp != ']') {
 815                         printf("Unexpected character '%c'\n", *newp);
 816                         return 1;
 817                 }
 818         } else {
 819                 /*
 820                  * Assume it is one or more strings.  Copy it into our
 821                  * data area for convenience (including the
 822                  * terminating '\0's).
 823                  */
 824                 while (stridx < count) {
 825                         size_t length = strlen(newp) + 1;
 826                         strcpy(data, newp);
 827                         data += length;
 828                         *len += length;
 829                         newp = newval[++stridx];
 830                 }
 831         }
 832         return 0;
 833 }
 834
 835 /****************************************************************************/
 836
 837 /*
 838  * Heuristic to guess if this is a string or concatenated strings.
 839  */
 840
 841 static int is_printable_string(const void *data, int len)
 842 {
 843         const char *s = data;
 844
 845         /* zero length is not */
 846         if (len == 0)
 847                 return 0;
 848
 849         /* must terminate with zero or '\n' */
 850         if (s[len - 1] != '\0' && s[len - 1] != '\n')
 851                 return 0;
 852
 853         /* printable or a null byte (concatenated strings) */
 854         while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
 855                 /*
 856                  * If we see a null, there are three possibilities:
 857                  * 1) If len == 1, it is the end of the string, printable
 858                  * 2) Next character also a null, not printable.
 859                  * 3) Next character not a null, continue to check.
 860                  */
 861                 if (s[0] == '\0') {
 862                         if (len == 1)
 863                                 return 1;
 864                         if (s[1] == '\0')
 865                                 return 0;
 866                 }
 867                 s++;
 868                 len--;
 869         }
 870
 871         /* Not the null termination, or not done yet: not printable */
 872         if (*s != '\0' || (len != 0))
 873                 return 0;
 874
 875         return 1;
 876 }
 877
 878
 879 /*
 880  * Print the property in the best format, a heuristic guess.  Print as
 881  * a string, concatenated strings, a byte, word, double word, or (if all
 882  * else fails) it is printed as a stream of bytes.
 883  */
 884 static void print_data(const void *data, int len)
 885 {
 886         int j;
 887         const char *env_max_dump;
 888         ulong max_dump = ULONG_MAX;
 889
 890         /* no data, don't print */
 891         if (len == 0)
 892                 return;
 893
 894         env_max_dump = env_get("fdt_max_dump");
 895         if (env_max_dump)
 896                 max_dump = simple_strtoul(env_max_dump, NULL, 16);
 897
 898         /*
 899          * It is a string, but it may have multiple strings (embedded '\0's).
 900          */
 901         if (is_printable_string(data, len)) {
 902                 puts("\"");
 903                 j = 0;
 904                 while (j < len) {
 905                         if (j > 0)
 906                                 puts("\", \"");
 907                         puts(data);
 908                         j    += strlen(data) + 1;
 909                         data += strlen(data) + 1;
 910                 }
 911                 puts("\"");
 912                 return;
 913         }
 914
 915         if ((len %4) == 0) {
 916                 if (len > max_dump)
 917                         printf("* 0x%p [0x%08x]", data, len);
 918                 else {
 919                         const __be32 *p;
 920
 921                         printf("<");
 922                         for (j = 0, p = data; j < len/4; j++)
 923                                 printf("0x%08x%s", fdt32_to_cpu(p[j]),
 924                                         j < (len/4 - 1) ? " " : "");
 925                         printf(">");
 926                 }
 927         } else { /* anything else... hexdump */
 928                 if (len > max_dump)
 929                         printf("* 0x%p [0x%08x]", data, len);
 930                 else {
 931                         const u8 *s;
 932
 933                         printf("[");
 934                         for (j = 0, s = data; j < len; j++)
 935                                 printf("%02x%s", s[j], j < len - 1 ? " " : "");
 936                         printf("]");
 937                 }
 938         }
 939 }
 940
 941 /****************************************************************************/
 942
 943 /*
 944  * Recursively print (a portion of) the working_fdt.  The depth parameter
 945  * determines how deeply nested the fdt is printed.
 946  */
 947 static int fdt_print(const char *pathp, char *prop, int depth)
 948 {
 949         static char tabs[MAX_LEVEL+1] =
 950                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
 951                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
 952         const void *nodep;      /* property node pointer */
 953         int  nodeoffset;        /* node offset from libfdt */
 954         int  nextoffset;        /* next node offset from libfdt */
 955         uint32_t tag;           /* tag */
 956         int  len;               /* length of the property */
 957         int  level = 0;         /* keep track of nesting level */
 958         const struct fdt_property *fdt_prop;
 959
 960         nodeoffset = fdt_path_offset (working_fdt, pathp);
 961         if (nodeoffset < 0) {
 962                 /*
 963                  * Not found or something else bad happened.
 964                  */
 965                 printf ("libfdt fdt_path_offset() returned %s\n",
 966                         fdt_strerror(nodeoffset));
 967                 return 1;
 968         }
 969         /*
 970          * The user passed in a property as well as node path.
 971          * Print only the given property and then return.
 972          */
 973         if (prop) {
 974                 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
 975                 if (len == 0) {
 976                         /* no property value */
 977                         printf("%s %s\n", pathp, prop);
 978                         return 0;
 979                 } else if (nodep && len > 0) {
 980                         printf("%s = ", prop);
 981                         print_data (nodep, len);
 982                         printf("\n");
 983                         return 0;
 984                 } else {
 985                         printf ("libfdt fdt_getprop(): %s\n",
 986                                 fdt_strerror(len));
 987                         return 1;
 988                 }
 989         }
 990
 991         /*
 992          * The user passed in a node path and no property,
 993          * print the node and all subnodes.
 994          */
 995         while(level >= 0) {
 996                 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
 997                 switch(tag) {
 998                 case FDT_BEGIN_NODE:
 999                         pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
1000                         if (level <= depth) {
1001                                 if (pathp == NULL)
1002                                         pathp = "/* NULL pointer error */";
1003                                 if (*pathp == '\0')
1004                                         pathp = "/";    /* root is nameless */
1005                                 printf("%s%s {\n",
1006                                         &tabs[MAX_LEVEL - level], pathp);
1007                         }
1008                         level++;
1009                         if (level >= MAX_LEVEL) {
1010                                 printf("Nested too deep, aborting.\n");
1011                                 return 1;
1012                         }
1013                         break;
1014                 case FDT_END_NODE:
1015                         level--;
1016                         if (level <= depth)
1017                                 printf("%s};\n", &tabs[MAX_LEVEL - level]);
1018                         if (level == 0) {
1019                                 level = -1;             /* exit the loop */
1020                         }
1021                         break;
1022                 case FDT_PROP:
1023                         fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
1024                                         sizeof(*fdt_prop));
1025                         pathp    = fdt_string(working_fdt,
1026                                         fdt32_to_cpu(fdt_prop->nameoff));
1027                         len      = fdt32_to_cpu(fdt_prop->len);
1028                         nodep    = fdt_prop->data;
1029                         if (len < 0) {
1030                                 printf ("libfdt fdt_getprop(): %s\n",
1031                                         fdt_strerror(len));
1032                                 return 1;
1033                         } else if (len == 0) {
1034                                 /* the property has no value */
1035                                 if (level <= depth)
1036                                         printf("%s%s;\n",
1037                                                 &tabs[MAX_LEVEL - level],
1038                                                 pathp);
1039                         } else {
1040                                 if (level <= depth) {
1041                                         printf("%s%s = ",
1042                                                 &tabs[MAX_LEVEL - level],
1043                                                 pathp);
1044                                         print_data (nodep, len);
1045                                         printf(";\n");
1046                                 }
1047                         }
1048                         break;
1049                 case FDT_NOP:
1050                         printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
1051                         break;
1052                 case FDT_END:
1053                         return 1;
1054                 default:
1055                         if (level <= depth)
1056                                 printf("Unknown tag 0x%08X\n", tag);
1057                         return 1;
1058                 }
1059                 nodeoffset = nextoffset;
1060         }
1061         return 0;
1062 }
1063
1064 /********************************************************************/
1065 #ifdef CONFIG_SYS_LONGHELP
1066 static char fdt_help_text[] =
1067         "addr [-c]  <addr> [<length>]   - Set the [control] fdt location to <addr>\n"
1068 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1069         "fdt apply <addr>                    - Apply overlay to the DT\n"
1070 #endif
1071 #ifdef CONFIG_OF_BOARD_SETUP
1072         "fdt boardsetup                      - Do board-specific set up\n"
1073 #endif
1074 #ifdef CONFIG_OF_SYSTEM_SETUP
1075         "fdt systemsetup                     - Do system-specific set up\n"
1076 #endif
1077         "fdt move   <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1078         "fdt resize [<extrasize>]            - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1079         "fdt print  <path> [<prop>]          - Recursive print starting at <path>\n"
1080         "fdt list   <path> [<prop>]          - Print one level starting at <path>\n"
1081         "fdt get value <var> <path> <prop>   - Get <property> and store in <var>\n"
1082         "fdt get name <var> <path> <index>   - Get name of node <index> and store in <var>\n"
1083         "fdt get addr <var> <path> <prop>    - Get start address of <property> and store in <var>\n"
1084         "fdt get size <var> <path> [<prop>]  - Get size of [<property>] or num nodes and store in <var>\n"
1085         "fdt set    <path> <prop> [<val>]    - Set <property> [to <val>]\n"
1086         "fdt mknode <path> <node>            - Create a new node after <path>\n"
1087         "fdt rm     <path> [<prop>]          - Delete the node or <property>\n"
1088         "fdt header [get <var> <member>]     - Display header info\n"
1089         "                                      get - get header member <member> and store it in <var>\n"
1090         "fdt bootcpu <id>                    - Set boot cpuid\n"
1091         "fdt memory <addr> <size>            - Add/Update memory node\n"
1092         "fdt rsvmem print                    - Show current mem reserves\n"
1093         "fdt rsvmem add <addr> <size>        - Add a mem reserve\n"
1094         "fdt rsvmem delete <index>           - Delete a mem reserves\n"
1095         "fdt chosen [<start> <end>]          - Add/update the /chosen branch in the tree\n"
1096         "                                        <start>/<end> - initrd start/end addr\n"
1097 #if defined(CONFIG_FIT_SIGNATURE)
1098         "fdt checksign [<addr>]              - check FIT signature\n"
1099         "                                        <start> - addr of key blob\n"
1100         "                                                  default gd->fdt_blob\n"
1101 #endif
1102         "NOTE: Dereference aliases by omitting the leading '/', "
1103                 "e.g. fdt print ethernet0.";
1104 #endif
1105
1106 U_BOOT_CMD(
1107         fdt,    255,    0,      do_fdt,
1108         "flattened device tree utility commands", fdt_help_text
1109 );