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 <linux/ctype.h>
  14 #include <linux/types.h>
  15 #include <asm/global_data.h>
  16 #include <linux/libfdt.h>
  17 #include <fdt_support.h>
  18 #include <mapmem.h>
  19 #include <asm/io.h>
  20
  21 #define MAX_LEVEL       32              /* how deeply nested we will go */
  22 #define SCRATCHPAD      1024            /* bytes of scratchpad memory */
  23 #define CMD_FDT_MAX_DUMP 64
  24
  25 /*
  26  * Global data (for the gd->bd)
  27  */
  28 DECLARE_GLOBAL_DATA_PTR;
  29
  30 static int fdt_valid(struct fdt_header **blobp);
  31 static int fdt_parse_prop(char *const*newval, int count, char *data, int *len);
  32 static int fdt_print(const char *pathp, char *prop, int depth);
  33 static int is_printable_string(const void *data, int len);
  34
  35 /*
  36  * The working_fdt points to our working flattened device tree.
  37  */
  38 struct fdt_header *working_fdt;
  39
  40 void set_working_fdt_addr(ulong addr)
  41 {
  42         void *buf;
  43
  44         buf = map_sysmem(addr, 0);
  45         working_fdt = buf;
  46         env_set_hex("fdtaddr", addr);
  47 }
  48
  49 /*
  50  * Get a value from the fdt and format it to be set in the environment
  51  */
  52 static int fdt_value_env_set(const void *nodep, int len, const char *var)
  53 {
  54         if (is_printable_string(nodep, len))
  55                 env_set(var, (void *)nodep);
  56         else if (len == 4) {
  57                 char buf[11];
  58
  59                 sprintf(buf, "0x%08X", fdt32_to_cpu(*(fdt32_t *)nodep));
  60                 env_set(var, buf);
  61         } else if (len%4 == 0 && len <= 20) {
  62                 /* Needed to print things like sha1 hashes. */
  63                 char buf[41];
  64                 int i;
  65
  66                 for (i = 0; i < len; i += sizeof(unsigned int))
  67                         sprintf(buf + (i * 2), "%08x",
  68                                 *(unsigned int *)(nodep + i));
  69                 env_set(var, buf);
  70         } else {
  71                 printf("error: unprintable value\n");
  72                 return 1;
  73         }
  74         return 0;
  75 }
  76
  77 static const char * const fdt_member_table[] = {
  78         "magic",
  79         "totalsize",
  80         "off_dt_struct",
  81         "off_dt_strings",
  82         "off_mem_rsvmap",
  83         "version",
  84         "last_comp_version",
  85         "boot_cpuid_phys",
  86         "size_dt_strings",
  87         "size_dt_struct",
  88 };
  89
  90 static int fdt_get_header_value(int argc, char * const argv[])
  91 {
  92         fdt32_t *fdtp = (fdt32_t *)working_fdt;
  93         ulong val;
  94         int i;
  95
  96         if (argv[2][0] != 'g')
  97                 return CMD_RET_FAILURE;
  98
  99         for (i = 0; i < ARRAY_SIZE(fdt_member_table); i++) {
 100                 if (strcmp(fdt_member_table[i], argv[4]))
 101                         continue;
 102
 103                 val = fdt32_to_cpu(fdtp[i]);
 104                 env_set_hex(argv[3], val);
 105                 return CMD_RET_SUCCESS;
 106         }
 107
 108         return CMD_RET_FAILURE;
 109 }
 110
 111 /*
 112  * Flattened Device Tree command, see the help for parameter definitions.
 113  */
 114 static int do_fdt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 115 {
 116         if (argc < 2)
 117                 return CMD_RET_USAGE;
 118
 119         /*
 120          * Set the address of the fdt
 121          */
 122         if (strncmp(argv[1], "ad", 2) == 0) {
 123                 unsigned long addr;
 124                 int control = 0;
 125                 struct fdt_header *blob;
 126                 /*
 127                  * Set the address [and length] of the fdt.
 128                  */
 129                 argc -= 2;
 130                 argv += 2;
 131 /* Temporary #ifdef - some archs don't have fdt_blob yet */
 132 #ifdef CONFIG_OF_CONTROL
 133                 if (argc && !strcmp(*argv, "-c")) {
 134                         control = 1;
 135                         argc--;
 136                         argv++;
 137                 }
 138 #endif
 139                 if (argc == 0) {
 140                         if (control)
 141                                 blob = (struct fdt_header *)gd->fdt_blob;
 142                         else
 143                                 blob = working_fdt;
 144                         if (!blob || !fdt_valid(&blob))
 145                                 return 1;
 146                         printf("The address of the fdt is %#08lx\n",
 147                                control ? (ulong)map_to_sysmem(blob) :
 148                                         env_get_hex("fdtaddr", 0));
 149                         return 0;
 150                 }
 151
 152                 addr = simple_strtoul(argv[0], NULL, 16);
 153                 blob = map_sysmem(addr, 0);
 154                 if (!fdt_valid(&blob))
 155                         return 1;
 156                 if (control)
 157                         gd->fdt_blob = blob;
 158                 else
 159                         set_working_fdt_addr(addr);
 160
 161                 if (argc >= 2) {
 162                         int  len;
 163                         int  err;
 164                         /*
 165                          * Optional new length
 166                          */
 167                         len = simple_strtoul(argv[1], NULL, 16);
 168                         if (len < fdt_totalsize(blob)) {
 169                                 printf ("New length %d < existing length %d, "
 170                                         "ignoring.\n",
 171                                         len, fdt_totalsize(blob));
 172                         } else {
 173                                 /*
 174                                  * Open in place with a new length.
 175                                  */
 176                                 err = fdt_open_into(blob, blob, len);
 177                                 if (err != 0) {
 178                                         printf ("libfdt fdt_open_into(): %s\n",
 179                                                 fdt_strerror(err));
 180                                 }
 181                         }
 182                 }
 183
 184                 return CMD_RET_SUCCESS;
 185         }
 186
 187         if (!working_fdt) {
 188                 puts(
 189                         "No FDT memory address configured. Please configure\n"
 190                         "the FDT address via \"fdt addr <address>\" command.\n"
 191                         "Aborting!\n");
 192                 return CMD_RET_FAILURE;
 193         }
 194
 195         /*
 196          * Move the working_fdt
 197          */
 198         if (strncmp(argv[1], "mo", 2) == 0) {
 199                 struct fdt_header *newaddr;
 200                 int  len;
 201                 int  err;
 202
 203                 if (argc < 4)
 204                         return CMD_RET_USAGE;
 205
 206                 /*
 207                  * Set the address and length of the fdt.
 208                  */
 209                 working_fdt = (struct fdt_header *)simple_strtoul(argv[2], NULL, 16);
 210                 if (!fdt_valid(&working_fdt))
 211                         return 1;
 212
 213                 newaddr = (struct fdt_header *)simple_strtoul(argv[3],NULL,16);
 214
 215                 /*
 216                  * If the user specifies a length, use that.  Otherwise use the
 217                  * current length.
 218                  */
 219                 if (argc <= 4) {
 220                         len = fdt_totalsize(working_fdt);
 221                 } else {
 222                         len = simple_strtoul(argv[4], NULL, 16);
 223                         if (len < fdt_totalsize(working_fdt)) {
 224                                 printf ("New length 0x%X < existing length "
 225                                         "0x%X, aborting.\n",
 226                                         len, fdt_totalsize(working_fdt));
 227                                 return 1;
 228                         }
 229                 }
 230
 231                 /*
 232                  * Copy to the new location.
 233                  */
 234                 err = fdt_open_into(working_fdt, newaddr, len);
 235                 if (err != 0) {
 236                         printf ("libfdt fdt_open_into(): %s\n",
 237                                 fdt_strerror(err));
 238                         return 1;
 239                 }
 240                 set_working_fdt_addr((ulong)newaddr);
 241 #ifdef CONFIG_OF_SYSTEM_SETUP
 242         /* Call the board-specific fixup routine */
 243         } else if (strncmp(argv[1], "sys", 3) == 0) {
 244                 int err = ft_system_setup(working_fdt, gd->bd);
 245
 246                 if (err) {
 247                         printf("Failed to add system information to FDT: %s\n",
 248                                fdt_strerror(err));
 249                         return CMD_RET_FAILURE;
 250                 }
 251 #endif
 252         /*
 253          * Make a new node
 254          */
 255         } else if (strncmp(argv[1], "mk", 2) == 0) {
 256                 char *pathp;            /* path */
 257                 char *nodep;            /* new node to add */
 258                 int  nodeoffset;        /* node offset from libfdt */
 259                 int  err;
 260
 261                 /*
 262                  * Parameters: Node path, new node to be appended to the path.
 263                  */
 264                 if (argc < 4)
 265                         return CMD_RET_USAGE;
 266
 267                 pathp = argv[2];
 268                 nodep = argv[3];
 269
 270                 nodeoffset = fdt_path_offset (working_fdt, pathp);
 271                 if (nodeoffset < 0) {
 272                         /*
 273                          * Not found or something else bad happened.
 274                          */
 275                         printf ("libfdt fdt_path_offset() returned %s\n",
 276                                 fdt_strerror(nodeoffset));
 277                         return 1;
 278                 }
 279                 err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
 280                 if (err < 0) {
 281                         printf ("libfdt fdt_add_subnode(): %s\n",
 282                                 fdt_strerror(err));
 283                         return 1;
 284                 }
 285
 286         /*
 287          * Set the value of a property in the working_fdt.
 288          */
 289         } else if (argv[1][0] == 's') {
 290                 char *pathp;            /* path */
 291                 char *prop;             /* property */
 292                 int  nodeoffset;        /* node offset from libfdt */
 293                 static char data[SCRATCHPAD] __aligned(4);/* property storage */
 294                 const void *ptmp;
 295                 int  len;               /* new length of the property */
 296                 int  ret;               /* return value */
 297
 298                 /*
 299                  * Parameters: Node path, property, optional value.
 300                  */
 301                 if (argc < 4)
 302                         return CMD_RET_USAGE;
 303
 304                 pathp  = argv[2];
 305                 prop   = argv[3];
 306
 307                 nodeoffset = fdt_path_offset (working_fdt, pathp);
 308                 if (nodeoffset < 0) {
 309                         /*
 310                          * Not found or something else bad happened.
 311                          */
 312                         printf ("libfdt fdt_path_offset() returned %s\n",
 313                                 fdt_strerror(nodeoffset));
 314                         return 1;
 315                 }
 316
 317                 if (argc == 4) {
 318                         len = 0;
 319                 } else {
 320                         ptmp = fdt_getprop(working_fdt, nodeoffset, prop, &len);
 321                         if (len > SCRATCHPAD) {
 322                                 printf("prop (%d) doesn't fit in scratchpad!\n",
 323                                        len);
 324                                 return 1;
 325                         }
 326                         if (ptmp != NULL)
 327                                 memcpy(data, ptmp, len);
 328
 329                         ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
 330                         if (ret != 0)
 331                                 return ret;
 332                 }
 333
 334                 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
 335                 if (ret < 0) {
 336                         printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
 337                         return 1;
 338                 }
 339
 340         /********************************************************************
 341          * Get the value of a property in the working_fdt.
 342          ********************************************************************/
 343         } else if (argv[1][0] == 'g') {
 344                 char *subcmd;           /* sub-command */
 345                 char *pathp;            /* path */
 346                 char *prop;             /* property */
 347                 char *var;              /* variable to store result */
 348                 int  nodeoffset;        /* node offset from libfdt */
 349                 const void *nodep;      /* property node pointer */
 350                 int  len = 0;           /* new length of the property */
 351
 352                 /*
 353                  * Parameters: Node path, property, optional value.
 354                  */
 355                 if (argc < 5)
 356                         return CMD_RET_USAGE;
 357
 358                 subcmd = argv[2];
 359
 360                 if (argc < 6 && subcmd[0] != 's')
 361                         return CMD_RET_USAGE;
 362
 363                 var    = argv[3];
 364                 pathp  = argv[4];
 365                 prop   = argv[5];
 366
 367                 nodeoffset = fdt_path_offset(working_fdt, pathp);
 368                 if (nodeoffset < 0) {
 369                         /*
 370                          * Not found or something else bad happened.
 371                          */
 372                         printf("libfdt fdt_path_offset() returned %s\n",
 373                                 fdt_strerror(nodeoffset));
 374                         return 1;
 375                 }
 376
 377                 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
 378                         int reqIndex = -1;
 379                         int startDepth = fdt_node_depth(
 380                                 working_fdt, nodeoffset);
 381                         int curDepth = startDepth;
 382                         int curIndex = -1;
 383                         int nextNodeOffset = fdt_next_node(
 384                                 working_fdt, nodeoffset, &curDepth);
 385
 386                         if (subcmd[0] == 'n')
 387                                 reqIndex = simple_strtoul(argv[5], NULL, 16);
 388
 389                         while (curDepth > startDepth) {
 390                                 if (curDepth == startDepth + 1)
 391                                         curIndex++;
 392                                 if (subcmd[0] == 'n' && curIndex == reqIndex) {
 393                                         const char *node_name;
 394
 395                                         node_name = fdt_get_name(working_fdt,
 396                                                                  nextNodeOffset,
 397                                                                  NULL);
 398                                         env_set(var, node_name);
 399                                         return 0;
 400                                 }
 401                                 nextNodeOffset = fdt_next_node(
 402                                         working_fdt, nextNodeOffset, &curDepth);
 403                                 if (nextNodeOffset < 0)
 404                                         break;
 405                         }
 406                         if (subcmd[0] == 's') {
 407                                 /* get the num nodes at this level */
 408                                 env_set_ulong(var, curIndex + 1);
 409                         } else {
 410                                 /* node index not found */
 411                                 printf("libfdt node not found\n");
 412                                 return 1;
 413                         }
 414                 } else {
 415                         nodep = fdt_getprop(
 416                                 working_fdt, nodeoffset, prop, &len);
 417                         if (len == 0) {
 418                                 /* no property value */
 419                                 env_set(var, "");
 420                                 return 0;
 421                         } else if (nodep && len > 0) {
 422                                 if (subcmd[0] == 'v') {
 423                                         int ret;
 424
 425                                         ret = fdt_value_env_set(nodep, len,
 426                                                                 var);
 427                                         if (ret != 0)
 428                                                 return ret;
 429                                 } else if (subcmd[0] == 'a') {
 430                                         /* Get address */
 431                                         char buf[11];
 432
 433                                         sprintf(buf, "0x%p", nodep);
 434                                         env_set(var, buf);
 435                                 } else if (subcmd[0] == 's') {
 436                                         /* Get size */
 437                                         char buf[11];
 438
 439                                         sprintf(buf, "0x%08X", len);
 440                                         env_set(var, buf);
 441                                 } else
 442                                         return CMD_RET_USAGE;
 443                                 return 0;
 444                         } else {
 445                                 printf("libfdt fdt_getprop(): %s\n",
 446                                         fdt_strerror(len));
 447                                 return 1;
 448                         }
 449                 }
 450
 451         /*
 452          * Print (recursive) / List (single level)
 453          */
 454         } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
 455                 int depth = MAX_LEVEL;  /* how deep to print */
 456                 char *pathp;            /* path */
 457                 char *prop;             /* property */
 458                 int  ret;               /* return value */
 459                 static char root[2] = "/";
 460
 461                 /*
 462                  * list is an alias for print, but limited to 1 level
 463                  */
 464                 if (argv[1][0] == 'l') {
 465                         depth = 1;
 466                 }
 467
 468                 /*
 469                  * Get the starting path.  The root node is an oddball,
 470                  * the offset is zero and has no name.
 471                  */
 472                 if (argc == 2)
 473                         pathp = root;
 474                 else
 475                         pathp = argv[2];
 476                 if (argc > 3)
 477                         prop = argv[3];
 478                 else
 479                         prop = NULL;
 480
 481                 ret = fdt_print(pathp, prop, depth);
 482                 if (ret != 0)
 483                         return ret;
 484
 485         /*
 486          * Remove a property/node
 487          */
 488         } else if (strncmp(argv[1], "rm", 2) == 0) {
 489                 int  nodeoffset;        /* node offset from libfdt */
 490                 int  err;
 491
 492                 /*
 493                  * Get the path.  The root node is an oddball, the offset
 494                  * is zero and has no name.
 495                  */
 496                 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
 497                 if (nodeoffset < 0) {
 498                         /*
 499                          * Not found or something else bad happened.
 500                          */
 501                         printf ("libfdt fdt_path_offset() returned %s\n",
 502                                 fdt_strerror(nodeoffset));
 503                         return 1;
 504                 }
 505                 /*
 506                  * Do the delete.  A fourth parameter means delete a property,
 507                  * otherwise delete the node.
 508                  */
 509                 if (argc > 3) {
 510                         err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
 511                         if (err < 0) {
 512                                 printf("libfdt fdt_delprop():  %s\n",
 513                                         fdt_strerror(err));
 514                                 return err;
 515                         }
 516                 } else {
 517                         err = fdt_del_node(working_fdt, nodeoffset);
 518                         if (err < 0) {
 519                                 printf("libfdt fdt_del_node():  %s\n",
 520                                         fdt_strerror(err));
 521                                 return err;
 522                         }
 523                 }
 524
 525         /*
 526          * Display header info
 527          */
 528         } else if (argv[1][0] == 'h') {
 529                 if (argc == 5)
 530                         return fdt_get_header_value(argc, argv);
 531
 532                 u32 version = fdt_version(working_fdt);
 533                 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
 534                 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
 535                        fdt_totalsize(working_fdt));
 536                 printf("off_dt_struct:\t\t0x%x\n",
 537                        fdt_off_dt_struct(working_fdt));
 538                 printf("off_dt_strings:\t\t0x%x\n",
 539                        fdt_off_dt_strings(working_fdt));
 540                 printf("off_mem_rsvmap:\t\t0x%x\n",
 541                        fdt_off_mem_rsvmap(working_fdt));
 542                 printf("version:\t\t%d\n", version);
 543                 printf("last_comp_version:\t%d\n",
 544                        fdt_last_comp_version(working_fdt));
 545                 if (version >= 2)
 546                         printf("boot_cpuid_phys:\t0x%x\n",
 547                                 fdt_boot_cpuid_phys(working_fdt));
 548                 if (version >= 3)
 549                         printf("size_dt_strings:\t0x%x\n",
 550                                 fdt_size_dt_strings(working_fdt));
 551                 if (version >= 17)
 552                         printf("size_dt_struct:\t\t0x%x\n",
 553                                 fdt_size_dt_struct(working_fdt));
 554                 printf("number mem_rsv:\t\t0x%x\n",
 555                        fdt_num_mem_rsv(working_fdt));
 556                 printf("\n");
 557
 558         /*
 559          * Set boot cpu id
 560          */
 561         } else if (strncmp(argv[1], "boo", 3) == 0) {
 562                 unsigned long tmp = simple_strtoul(argv[2], NULL, 16);
 563                 fdt_set_boot_cpuid_phys(working_fdt, tmp);
 564
 565         /*
 566          * memory command
 567          */
 568         } else if (strncmp(argv[1], "me", 2) == 0) {
 569                 uint64_t addr, size;
 570                 int err;
 571                 addr = simple_strtoull(argv[2], NULL, 16);
 572                 size = simple_strtoull(argv[3], NULL, 16);
 573                 err = fdt_fixup_memory(working_fdt, addr, size);
 574                 if (err < 0)
 575                         return err;
 576
 577         /*
 578          * mem reserve commands
 579          */
 580         } else if (strncmp(argv[1], "rs", 2) == 0) {
 581                 if (argv[2][0] == 'p') {
 582                         uint64_t addr, size;
 583                         int total = fdt_num_mem_rsv(working_fdt);
 584                         int j, err;
 585                         printf("index\t\t   start\t\t    size\n");
 586                         printf("-------------------------------"
 587                                 "-----------------\n");
 588                         for (j = 0; j < total; j++) {
 589                                 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
 590                                 if (err < 0) {
 591                                         printf("libfdt fdt_get_mem_rsv():  %s\n",
 592                                                         fdt_strerror(err));
 593                                         return err;
 594                                 }
 595                                 printf("    %x\t%08x%08x\t%08x%08x\n", j,
 596                                         (u32)(addr >> 32),
 597                                         (u32)(addr & 0xffffffff),
 598                                         (u32)(size >> 32),
 599                                         (u32)(size & 0xffffffff));
 600                         }
 601                 } else if (argv[2][0] == 'a') {
 602                         uint64_t addr, size;
 603                         int err;
 604                         addr = simple_strtoull(argv[3], NULL, 16);
 605                         size = simple_strtoull(argv[4], NULL, 16);
 606                         err = fdt_add_mem_rsv(working_fdt, addr, size);
 607
 608                         if (err < 0) {
 609                                 printf("libfdt fdt_add_mem_rsv():  %s\n",
 610                                         fdt_strerror(err));
 611                                 return err;
 612                         }
 613                 } else if (argv[2][0] == 'd') {
 614                         unsigned long idx = simple_strtoul(argv[3], NULL, 16);
 615                         int err = fdt_del_mem_rsv(working_fdt, idx);
 616
 617                         if (err < 0) {
 618                                 printf("libfdt fdt_del_mem_rsv():  %s\n",
 619                                         fdt_strerror(err));
 620                                 return err;
 621                         }
 622                 } else {
 623                         /* Unrecognized command */
 624                         return CMD_RET_USAGE;
 625                 }
 626         }
 627 #ifdef CONFIG_OF_BOARD_SETUP
 628         /* Call the board-specific fixup routine */
 629         else if (strncmp(argv[1], "boa", 3) == 0) {
 630                 int err = ft_board_setup(working_fdt, gd->bd);
 631
 632                 if (err) {
 633                         printf("Failed to update board information in FDT: %s\n",
 634                                fdt_strerror(err));
 635                         return CMD_RET_FAILURE;
 636                 }
 637 #ifdef CONFIG_SOC_KEYSTONE
 638                 ft_board_setup_ex(working_fdt, gd->bd);
 639 #endif
 640         }
 641 #endif
 642         /* Create a chosen node */
 643         else if (strncmp(argv[1], "cho", 3) == 0) {
 644                 unsigned long initrd_start = 0, initrd_end = 0;
 645
 646                 if ((argc != 2) && (argc != 4))
 647                         return CMD_RET_USAGE;
 648
 649                 if (argc == 4) {
 650                         initrd_start = simple_strtoul(argv[2], NULL, 16);
 651                         initrd_end = simple_strtoul(argv[3], NULL, 16);
 652                 }
 653
 654                 fdt_chosen(working_fdt);
 655                 fdt_initrd(working_fdt, initrd_start, initrd_end);
 656
 657 #if defined(CONFIG_FIT_SIGNATURE)
 658         } else if (strncmp(argv[1], "che", 3) == 0) {
 659                 int cfg_noffset;
 660                 int ret;
 661                 unsigned long addr;
 662                 struct fdt_header *blob;
 663
 664                 if (!working_fdt)
 665                         return CMD_RET_FAILURE;
 666
 667                 if (argc > 2) {
 668                         addr = simple_strtoul(argv[2], NULL, 16);
 669                         blob = map_sysmem(addr, 0);
 670                 } else {
 671                         blob = (struct fdt_header *)gd->fdt_blob;
 672                 }
 673                 if (!fdt_valid(&blob))
 674                         return 1;
 675
 676                 gd->fdt_blob = blob;
 677                 cfg_noffset = fit_conf_get_node(working_fdt, NULL);
 678                 if (!cfg_noffset) {
 679                         printf("Could not find configuration node: %s\n",
 680                                fdt_strerror(cfg_noffset));
 681                         return CMD_RET_FAILURE;
 682                 }
 683
 684                 ret = fit_config_verify(working_fdt, cfg_noffset);
 685                 if (ret == 0)
 686                         return CMD_RET_SUCCESS;
 687                 else
 688                         return CMD_RET_FAILURE;
 689 #endif
 690
 691         }
 692 #ifdef CONFIG_OF_LIBFDT_OVERLAY
 693         /* apply an overlay */
 694         else if (strncmp(argv[1], "ap", 2) == 0) {
 695                 unsigned long addr;
 696                 struct fdt_header *blob;
 697                 int ret;
 698
 699                 if (argc != 3)
 700                         return CMD_RET_USAGE;
 701
 702                 if (!working_fdt)
 703                         return CMD_RET_FAILURE;
 704
 705                 addr = simple_strtoul(argv[2], NULL, 16);
 706                 blob = map_sysmem(addr, 0);
 707                 if (!fdt_valid(&blob))
 708                         return CMD_RET_FAILURE;
 709
 710                 /* apply method prints messages on error */
 711                 ret = fdt_overlay_apply_verbose(working_fdt, blob);
 712                 if (ret)
 713                         return CMD_RET_FAILURE;
 714         }
 715 #endif
 716         /* resize the fdt */
 717         else if (strncmp(argv[1], "re", 2) == 0) {
 718                 uint extrasize;
 719                 if (argc > 2)
 720                         extrasize = simple_strtoul(argv[2], NULL, 16);
 721                 else
 722                         extrasize = 0;
 723                 fdt_shrink_to_minimum(working_fdt, extrasize);
 724         }
 725         else {
 726                 /* Unrecognized command */
 727                 return CMD_RET_USAGE;
 728         }
 729
 730         return 0;
 731 }
 732
 733 /****************************************************************************/
 734
 735 /**
 736  * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
 737  *
 738  * @blobp: Pointer to FDT pointer
 739  * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
 740  */
 741 static int fdt_valid(struct fdt_header **blobp)
 742 {
 743         const void *blob = *blobp;
 744         int err;
 745
 746         if (blob == NULL) {
 747                 printf ("The address of the fdt is invalid (NULL).\n");
 748                 return 0;
 749         }
 750
 751         err = fdt_check_header(blob);
 752         if (err == 0)
 753                 return 1;       /* valid */
 754
 755         if (err < 0) {
 756                 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
 757                 /*
 758                  * Be more informative on bad version.
 759                  */
 760                 if (err == -FDT_ERR_BADVERSION) {
 761                         if (fdt_version(blob) <
 762                             FDT_FIRST_SUPPORTED_VERSION) {
 763                                 printf (" - too old, fdt %d < %d",
 764                                         fdt_version(blob),
 765                                         FDT_FIRST_SUPPORTED_VERSION);
 766                         }
 767                         if (fdt_last_comp_version(blob) >
 768                             FDT_LAST_SUPPORTED_VERSION) {
 769                                 printf (" - too new, fdt %d > %d",
 770                                         fdt_version(blob),
 771                                         FDT_LAST_SUPPORTED_VERSION);
 772                         }
 773                 }
 774                 printf("\n");
 775                 *blobp = NULL;
 776                 return 0;
 777         }
 778         return 1;
 779 }
 780
 781 /****************************************************************************/
 782
 783 /*
 784  * Parse the user's input, partially heuristic.  Valid formats:
 785  * <0x00112233 4 05>    - an array of cells.  Numbers follow standard
 786  *                      C conventions.
 787  * [00 11 22 .. nn] - byte stream
 788  * "string"     - If the the value doesn't start with "<" or "[", it is
 789  *                      treated as a string.  Note that the quotes are
 790  *                      stripped by the parser before we get the string.
 791  * newval: An array of strings containing the new property as specified
 792  *      on the command line
 793  * count: The number of strings in the array
 794  * data: A bytestream to be placed in the property
 795  * len: The length of the resulting bytestream
 796  */
 797 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
 798 {
 799         char *cp;               /* temporary char pointer */
 800         char *newp;             /* temporary newval char pointer */
 801         unsigned long tmp;      /* holds converted values */
 802         int stridx = 0;
 803
 804         *len = 0;
 805         newp = newval[0];
 806
 807         /* An array of cells */
 808         if (*newp == '<') {
 809                 newp++;
 810                 while ((*newp != '>') && (stridx < count)) {
 811                         /*
 812                          * Keep searching until we find that last ">"
 813                          * That way users don't have to escape the spaces
 814                          */
 815                         if (*newp == '\0') {
 816                                 newp = newval[++stridx];
 817                                 continue;
 818                         }
 819
 820                         cp = newp;
 821                         tmp = simple_strtoul(cp, &newp, 0);
 822                         if (*cp != '?')
 823                                 *(fdt32_t *)data = cpu_to_fdt32(tmp);
 824                         else
 825                                 newp++;
 826
 827                         data  += 4;
 828                         *len += 4;
 829
 830                         /* If the ptr didn't advance, something went wrong */
 831                         if ((newp - cp) <= 0) {
 832                                 printf("Sorry, I could not convert \"%s\"\n",
 833                                         cp);
 834                                 return 1;
 835                         }
 836
 837                         while (*newp == ' ')
 838                                 newp++;
 839                 }
 840
 841                 if (*newp != '>') {
 842                         printf("Unexpected character '%c'\n", *newp);
 843                         return 1;
 844                 }
 845         } else if (*newp == '[') {
 846                 /*
 847                  * Byte stream.  Convert the values.
 848                  */
 849                 newp++;
 850                 while ((stridx < count) && (*newp != ']')) {
 851                         while (*newp == ' ')
 852                                 newp++;
 853                         if (*newp == '\0') {
 854                                 newp = newval[++stridx];
 855                                 continue;
 856                         }
 857                         if (!isxdigit(*newp))
 858                                 break;
 859                         tmp = simple_strtoul(newp, &newp, 16);
 860                         *data++ = tmp & 0xFF;
 861                         *len    = *len + 1;
 862                 }
 863                 if (*newp != ']') {
 864                         printf("Unexpected character '%c'\n", *newp);
 865                         return 1;
 866                 }
 867         } else {
 868                 /*
 869                  * Assume it is one or more strings.  Copy it into our
 870                  * data area for convenience (including the
 871                  * terminating '\0's).
 872                  */
 873                 while (stridx < count) {
 874                         size_t length = strlen(newp) + 1;
 875                         strcpy(data, newp);
 876                         data += length;
 877                         *len += length;
 878                         newp = newval[++stridx];
 879                 }
 880         }
 881         return 0;
 882 }
 883
 884 /****************************************************************************/
 885
 886 /*
 887  * Heuristic to guess if this is a string or concatenated strings.
 888  */
 889
 890 static int is_printable_string(const void *data, int len)
 891 {
 892         const char *s = data;
 893
 894         /* zero length is not */
 895         if (len == 0)
 896                 return 0;
 897
 898         /* must terminate with zero or '\n' */
 899         if (s[len - 1] != '\0' && s[len - 1] != '\n')
 900                 return 0;
 901
 902         /* printable or a null byte (concatenated strings) */
 903         while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
 904                 /*
 905                  * If we see a null, there are three possibilities:
 906                  * 1) If len == 1, it is the end of the string, printable
 907                  * 2) Next character also a null, not printable.
 908                  * 3) Next character not a null, continue to check.
 909                  */
 910                 if (s[0] == '\0') {
 911                         if (len == 1)
 912                                 return 1;
 913                         if (s[1] == '\0')
 914                                 return 0;
 915                 }
 916                 s++;
 917                 len--;
 918         }
 919
 920         /* Not the null termination, or not done yet: not printable */
 921         if (*s != '\0' || (len != 0))
 922                 return 0;
 923
 924         return 1;
 925 }
 926
 927
 928 /*
 929  * Print the property in the best format, a heuristic guess.  Print as
 930  * a string, concatenated strings, a byte, word, double word, or (if all
 931  * else fails) it is printed as a stream of bytes.
 932  */
 933 static void print_data(const void *data, int len)
 934 {
 935         int j;
 936
 937         /* no data, don't print */
 938         if (len == 0)
 939                 return;
 940
 941         /*
 942          * It is a string, but it may have multiple strings (embedded '\0's).
 943          */
 944         if (is_printable_string(data, len)) {
 945                 puts("\"");
 946                 j = 0;
 947                 while (j < len) {
 948                         if (j > 0)
 949                                 puts("\", \"");
 950                         puts(data);
 951                         j    += strlen(data) + 1;
 952                         data += strlen(data) + 1;
 953                 }
 954                 puts("\"");
 955                 return;
 956         }
 957
 958         if ((len %4) == 0) {
 959                 if (len > CMD_FDT_MAX_DUMP)
 960                         printf("* 0x%p [0x%08x]", data, len);
 961                 else {
 962                         const __be32 *p;
 963
 964                         printf("<");
 965                         for (j = 0, p = data; j < len/4; j++)
 966                                 printf("0x%08x%s", fdt32_to_cpu(p[j]),
 967                                         j < (len/4 - 1) ? " " : "");
 968                         printf(">");
 969                 }
 970         } else { /* anything else... hexdump */
 971                 if (len > CMD_FDT_MAX_DUMP)
 972                         printf("* 0x%p [0x%08x]", data, len);
 973                 else {
 974                         const u8 *s;
 975
 976                         printf("[");
 977                         for (j = 0, s = data; j < len; j++)
 978                                 printf("%02x%s", s[j], j < len - 1 ? " " : "");
 979                         printf("]");
 980                 }
 981         }
 982 }
 983
 984 /****************************************************************************/
 985
 986 /*
 987  * Recursively print (a portion of) the working_fdt.  The depth parameter
 988  * determines how deeply nested the fdt is printed.
 989  */
 990 static int fdt_print(const char *pathp, char *prop, int depth)
 991 {
 992         static char tabs[MAX_LEVEL+1] =
 993                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
 994                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
 995         const void *nodep;      /* property node pointer */
 996         int  nodeoffset;        /* node offset from libfdt */
 997         int  nextoffset;        /* next node offset from libfdt */
 998         uint32_t tag;           /* tag */
 999         int  len;               /* length of the property */
1000         int  level = 0;         /* keep track of nesting level */
1001         const struct fdt_property *fdt_prop;
1002
1003         nodeoffset = fdt_path_offset (working_fdt, pathp);
1004         if (nodeoffset < 0) {
1005                 /*
1006                  * Not found or something else bad happened.
1007                  */
1008                 printf ("libfdt fdt_path_offset() returned %s\n",
1009                         fdt_strerror(nodeoffset));
1010                 return 1;
1011         }
1012         /*
1013          * The user passed in a property as well as node path.
1014          * Print only the given property and then return.
1015          */
1016         if (prop) {
1017                 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
1018                 if (len == 0) {
1019                         /* no property value */
1020                         printf("%s %s\n", pathp, prop);
1021                         return 0;
1022                 } else if (nodep && len > 0) {
1023                         printf("%s = ", prop);
1024                         print_data (nodep, len);
1025                         printf("\n");
1026                         return 0;
1027                 } else {
1028                         printf ("libfdt fdt_getprop(): %s\n",
1029                                 fdt_strerror(len));
1030                         return 1;
1031                 }
1032         }
1033
1034         /*
1035          * The user passed in a node path and no property,
1036          * print the node and all subnodes.
1037          */
1038         while(level >= 0) {
1039                 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
1040                 switch(tag) {
1041                 case FDT_BEGIN_NODE:
1042                         pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
1043                         if (level <= depth) {
1044                                 if (pathp == NULL)
1045                                         pathp = "/* NULL pointer error */";
1046                                 if (*pathp == '\0')
1047                                         pathp = "/";    /* root is nameless */
1048                                 printf("%s%s {\n",
1049                                         &tabs[MAX_LEVEL - level], pathp);
1050                         }
1051                         level++;
1052                         if (level >= MAX_LEVEL) {
1053                                 printf("Nested too deep, aborting.\n");
1054                                 return 1;
1055                         }
1056                         break;
1057                 case FDT_END_NODE:
1058                         level--;
1059                         if (level <= depth)
1060                                 printf("%s};\n", &tabs[MAX_LEVEL - level]);
1061                         if (level == 0) {
1062                                 level = -1;             /* exit the loop */
1063                         }
1064                         break;
1065                 case FDT_PROP:
1066                         fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
1067                                         sizeof(*fdt_prop));
1068                         pathp    = fdt_string(working_fdt,
1069                                         fdt32_to_cpu(fdt_prop->nameoff));
1070                         len      = fdt32_to_cpu(fdt_prop->len);
1071                         nodep    = fdt_prop->data;
1072                         if (len < 0) {
1073                                 printf ("libfdt fdt_getprop(): %s\n",
1074                                         fdt_strerror(len));
1075                                 return 1;
1076                         } else if (len == 0) {
1077                                 /* the property has no value */
1078                                 if (level <= depth)
1079                                         printf("%s%s;\n",
1080                                                 &tabs[MAX_LEVEL - level],
1081                                                 pathp);
1082                         } else {
1083                                 if (level <= depth) {
1084                                         printf("%s%s = ",
1085                                                 &tabs[MAX_LEVEL - level],
1086                                                 pathp);
1087                                         print_data (nodep, len);
1088                                         printf(";\n");
1089                                 }
1090                         }
1091                         break;
1092                 case FDT_NOP:
1093                         printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
1094                         break;
1095                 case FDT_END:
1096                         return 1;
1097                 default:
1098                         if (level <= depth)
1099                                 printf("Unknown tag 0x%08X\n", tag);
1100                         return 1;
1101                 }
1102                 nodeoffset = nextoffset;
1103         }
1104         return 0;
1105 }
1106
1107 /********************************************************************/
1108 #ifdef CONFIG_SYS_LONGHELP
1109 static char fdt_help_text[] =
1110         "addr [-c]  <addr> [<length>]   - Set the [control] fdt location to <addr>\n"
1111 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1112         "fdt apply <addr>                    - Apply overlay to the DT\n"
1113 #endif
1114 #ifdef CONFIG_OF_BOARD_SETUP
1115         "fdt boardsetup                      - Do board-specific set up\n"
1116 #endif
1117 #ifdef CONFIG_OF_SYSTEM_SETUP
1118         "fdt systemsetup                     - Do system-specific set up\n"
1119 #endif
1120         "fdt move   <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1121         "fdt resize [<extrasize>]            - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1122         "fdt print  <path> [<prop>]          - Recursive print starting at <path>\n"
1123         "fdt list   <path> [<prop>]          - Print one level starting at <path>\n"
1124         "fdt get value <var> <path> <prop>   - Get <property> and store in <var>\n"
1125         "fdt get name <var> <path> <index>   - Get name of node <index> and store in <var>\n"
1126         "fdt get addr <var> <path> <prop>    - Get start address of <property> and store in <var>\n"
1127         "fdt get size <var> <path> [<prop>]  - Get size of [<property>] or num nodes and store in <var>\n"
1128         "fdt set    <path> <prop> [<val>]    - Set <property> [to <val>]\n"
1129         "fdt mknode <path> <node>            - Create a new node after <path>\n"
1130         "fdt rm     <path> [<prop>]          - Delete the node or <property>\n"
1131         "fdt header [get <var> <member>]     - Display header info\n"
1132         "                                      get - get header member <member> and store it in <var>\n"
1133         "fdt bootcpu <id>                    - Set boot cpuid\n"
1134         "fdt memory <addr> <size>            - Add/Update memory node\n"
1135         "fdt rsvmem print                    - Show current mem reserves\n"
1136         "fdt rsvmem add <addr> <size>        - Add a mem reserve\n"
1137         "fdt rsvmem delete <index>           - Delete a mem reserves\n"
1138         "fdt chosen [<start> <end>]          - Add/update the /chosen branch in the tree\n"
1139         "                                        <start>/<end> - initrd start/end addr\n"
1140 #if defined(CONFIG_FIT_SIGNATURE)
1141         "fdt checksign [<addr>]              - check FIT signature\n"
1142         "                                        <start> - addr of key blob\n"
1143         "                                                  default gd->fdt_blob\n"
1144 #endif
1145         "NOTE: Dereference aliases by omitting the leading '/', "
1146                 "e.g. fdt print ethernet0.";
1147 #endif
1148
1149 U_BOOT_CMD(
1150         fdt,    255,    0,      do_fdt,
1151         "flattened device tree utility commands", fdt_help_text
1152 );