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 #define CMD_FDT_MAX_DUMP 64
  25
  26 /*
  27  * Global data (for the gd->bd)
  28  */
  29 DECLARE_GLOBAL_DATA_PTR;
  30
  31 static int fdt_valid(struct fdt_header **blobp);
  32 static int fdt_parse_prop(char *const*newval, int count, char *data, int *len);
  33 static int fdt_print(const char *pathp, char *prop, int depth);
  34 static int is_printable_string(const void *data, int len);
  35
  36 /*
  37  * The working_fdt points to our working flattened device tree.
  38  */
  39 struct fdt_header *working_fdt;
  40
  41 void set_working_fdt_addr(ulong addr)
  42 {
  43         void *buf;
  44
  45         buf = map_sysmem(addr, 0);
  46         working_fdt = buf;
  47         env_set_hex("fdtaddr", addr);
  48 }
  49
  50 /*
  51  * Get a value from the fdt and format it to be set in the environment
  52  */
  53 static int fdt_value_env_set(const void *nodep, int len, const char *var)
  54 {
  55         if (is_printable_string(nodep, len))
  56                 env_set(var, (void *)nodep);
  57         else if (len == 4) {
  58                 char buf[11];
  59
  60                 sprintf(buf, "0x%08X", fdt32_to_cpu(*(fdt32_t *)nodep));
  61                 env_set(var, buf);
  62         } else if (len%4 == 0 && len <= 20) {
  63                 /* Needed to print things like sha1 hashes. */
  64                 char buf[41];
  65                 int i;
  66
  67                 for (i = 0; i < len; i += sizeof(unsigned int))
  68                         sprintf(buf + (i * 2), "%08x",
  69                                 *(unsigned int *)(nodep + i));
  70                 env_set(var, buf);
  71         } else {
  72                 printf("error: unprintable value\n");
  73                 return 1;
  74         }
  75         return 0;
  76 }
  77
  78 static const char * const fdt_member_table[] = {
  79         "magic",
  80         "totalsize",
  81         "off_dt_struct",
  82         "off_dt_strings",
  83         "off_mem_rsvmap",
  84         "version",
  85         "last_comp_version",
  86         "boot_cpuid_phys",
  87         "size_dt_strings",
  88         "size_dt_struct",
  89 };
  90
  91 static int fdt_get_header_value(int argc, char *const argv[])
  92 {
  93         fdt32_t *fdtp = (fdt32_t *)working_fdt;
  94         ulong val;
  95         int i;
  96
  97         if (argv[2][0] != 'g')
  98                 return CMD_RET_FAILURE;
  99
 100         for (i = 0; i < ARRAY_SIZE(fdt_member_table); i++) {
 101                 if (strcmp(fdt_member_table[i], argv[4]))
 102                         continue;
 103
 104                 val = fdt32_to_cpu(fdtp[i]);
 105                 env_set_hex(argv[3], val);
 106                 return CMD_RET_SUCCESS;
 107         }
 108
 109         return CMD_RET_FAILURE;
 110 }
 111
 112 /*
 113  * Flattened Device Tree command, see the help for parameter definitions.
 114  */
 115 static int do_fdt(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 116 {
 117         if (argc < 2)
 118                 return CMD_RET_USAGE;
 119
 120         /*
 121          * Set the address of the fdt
 122          */
 123         if (strncmp(argv[1], "ad", 2) == 0) {
 124                 unsigned long addr;
 125                 int control = 0;
 126                 struct fdt_header *blob;
 127                 /*
 128                  * Set the address [and length] of the fdt.
 129                  */
 130                 argc -= 2;
 131                 argv += 2;
 132 /* Temporary #ifdef - some archs don't have fdt_blob yet */
 133 #ifdef CONFIG_OF_CONTROL
 134                 if (argc && !strcmp(*argv, "-c")) {
 135                         control = 1;
 136                         argc--;
 137                         argv++;
 138                 }
 139 #endif
 140                 if (argc == 0) {
 141                         if (control)
 142                                 blob = (struct fdt_header *)gd->fdt_blob;
 143                         else
 144                                 blob = working_fdt;
 145                         if (!blob || !fdt_valid(&blob))
 146                                 return 1;
 147                         printf("The address of the fdt is %#08lx\n",
 148                                control ? (ulong)map_to_sysmem(blob) :
 149                                         env_get_hex("fdtaddr", 0));
 150                         return 0;
 151                 }
 152
 153                 addr = simple_strtoul(argv[0], NULL, 16);
 154                 blob = map_sysmem(addr, 0);
 155                 if (!fdt_valid(&blob))
 156                         return 1;
 157                 if (control)
 158                         gd->fdt_blob = blob;
 159                 else
 160                         set_working_fdt_addr(addr);
 161
 162                 if (argc >= 2) {
 163                         int  len;
 164                         int  err;
 165                         /*
 166                          * Optional new length
 167                          */
 168                         len = simple_strtoul(argv[1], NULL, 16);
 169                         if (len < fdt_totalsize(blob)) {
 170                                 printf ("New length %d < existing length %d, "
 171                                         "ignoring.\n",
 172                                         len, fdt_totalsize(blob));
 173                         } else {
 174                                 /*
 175                                  * Open in place with a new length.
 176                                  */
 177                                 err = fdt_open_into(blob, blob, len);
 178                                 if (err != 0) {
 179                                         printf ("libfdt fdt_open_into(): %s\n",
 180                                                 fdt_strerror(err));
 181                                 }
 182                         }
 183                 }
 184
 185                 return CMD_RET_SUCCESS;
 186         }
 187
 188         if (!working_fdt) {
 189                 puts(
 190                         "No FDT memory address configured. Please configure\n"
 191                         "the FDT address via \"fdt addr <address>\" command.\n"
 192                         "Aborting!\n");
 193                 return CMD_RET_FAILURE;
 194         }
 195
 196         /*
 197          * Move the working_fdt
 198          */
 199         if (strncmp(argv[1], "mo", 2) == 0) {
 200                 struct fdt_header *newaddr;
 201                 int  len;
 202                 int  err;
 203
 204                 if (argc < 4)
 205                         return CMD_RET_USAGE;
 206
 207                 /*
 208                  * Set the address and length of the fdt.
 209                  */
 210                 working_fdt = (struct fdt_header *)simple_strtoul(argv[2], NULL, 16);
 211                 if (!fdt_valid(&working_fdt))
 212                         return 1;
 213
 214                 newaddr = (struct fdt_header *)simple_strtoul(argv[3],NULL,16);
 215
 216                 /*
 217                  * If the user specifies a length, use that.  Otherwise use the
 218                  * current length.
 219                  */
 220                 if (argc <= 4) {
 221                         len = fdt_totalsize(working_fdt);
 222                 } else {
 223                         len = simple_strtoul(argv[4], NULL, 16);
 224                         if (len < fdt_totalsize(working_fdt)) {
 225                                 printf ("New length 0x%X < existing length "
 226                                         "0x%X, aborting.\n",
 227                                         len, fdt_totalsize(working_fdt));
 228                                 return 1;
 229                         }
 230                 }
 231
 232                 /*
 233                  * Copy to the new location.
 234                  */
 235                 err = fdt_open_into(working_fdt, newaddr, len);
 236                 if (err != 0) {
 237                         printf ("libfdt fdt_open_into(): %s\n",
 238                                 fdt_strerror(err));
 239                         return 1;
 240                 }
 241                 set_working_fdt_addr((ulong)newaddr);
 242 #ifdef CONFIG_OF_SYSTEM_SETUP
 243         /* Call the board-specific fixup routine */
 244         } else if (strncmp(argv[1], "sys", 3) == 0) {
 245                 int err = ft_system_setup(working_fdt, gd->bd);
 246
 247                 if (err) {
 248                         printf("Failed to add system information to FDT: %s\n",
 249                                fdt_strerror(err));
 250                         return CMD_RET_FAILURE;
 251                 }
 252 #endif
 253         /*
 254          * Make a new node
 255          */
 256         } else if (strncmp(argv[1], "mk", 2) == 0) {
 257                 char *pathp;            /* path */
 258                 char *nodep;            /* new node to add */
 259                 int  nodeoffset;        /* node offset from libfdt */
 260                 int  err;
 261
 262                 /*
 263                  * Parameters: Node path, new node to be appended to the path.
 264                  */
 265                 if (argc < 4)
 266                         return CMD_RET_USAGE;
 267
 268                 pathp = argv[2];
 269                 nodep = argv[3];
 270
 271                 nodeoffset = fdt_path_offset (working_fdt, pathp);
 272                 if (nodeoffset < 0) {
 273                         /*
 274                          * Not found or something else bad happened.
 275                          */
 276                         printf ("libfdt fdt_path_offset() returned %s\n",
 277                                 fdt_strerror(nodeoffset));
 278                         return 1;
 279                 }
 280                 err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
 281                 if (err < 0) {
 282                         printf ("libfdt fdt_add_subnode(): %s\n",
 283                                 fdt_strerror(err));
 284                         return 1;
 285                 }
 286
 287         /*
 288          * Set the value of a property in the working_fdt.
 289          */
 290         } else if (strncmp(argv[1], "se", 2) == 0) {
 291                 char *pathp;            /* path */
 292                 char *prop;             /* property */
 293                 int  nodeoffset;        /* node offset from libfdt */
 294                 static char data[SCRATCHPAD] __aligned(4);/* property storage */
 295                 const void *ptmp;
 296                 int  len;               /* new length of the property */
 297                 int  ret;               /* return value */
 298
 299                 /*
 300                  * Parameters: Node path, property, optional value.
 301                  */
 302                 if (argc < 4)
 303                         return CMD_RET_USAGE;
 304
 305                 pathp  = argv[2];
 306                 prop   = argv[3];
 307
 308                 nodeoffset = fdt_path_offset (working_fdt, pathp);
 309                 if (nodeoffset < 0) {
 310                         /*
 311                          * Not found or something else bad happened.
 312                          */
 313                         printf ("libfdt fdt_path_offset() returned %s\n",
 314                                 fdt_strerror(nodeoffset));
 315                         return 1;
 316                 }
 317
 318                 if (argc == 4) {
 319                         len = 0;
 320                 } else {
 321                         ptmp = fdt_getprop(working_fdt, nodeoffset, prop, &len);
 322                         if (len > SCRATCHPAD) {
 323                                 printf("prop (%d) doesn't fit in scratchpad!\n",
 324                                        len);
 325                                 return 1;
 326                         }
 327                         if (ptmp != NULL)
 328                                 memcpy(data, ptmp, len);
 329
 330                         ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
 331                         if (ret != 0)
 332                                 return ret;
 333                 }
 334
 335                 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
 336                 if (ret < 0) {
 337                         printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
 338                         return 1;
 339                 }
 340
 341         /********************************************************************
 342          * Get the value of a property in the working_fdt.
 343          ********************************************************************/
 344         } else if (argv[1][0] == 'g') {
 345                 char *subcmd;           /* sub-command */
 346                 char *pathp;            /* path */
 347                 char *prop;             /* property */
 348                 char *var;              /* variable to store result */
 349                 int  nodeoffset;        /* node offset from libfdt */
 350                 const void *nodep;      /* property node pointer */
 351                 int  len = 0;           /* new length of the property */
 352
 353                 /*
 354                  * Parameters: Node path, property, optional value.
 355                  */
 356                 if (argc < 5)
 357                         return CMD_RET_USAGE;
 358
 359                 subcmd = argv[2];
 360
 361                 if (argc < 6 && subcmd[0] != 's')
 362                         return CMD_RET_USAGE;
 363
 364                 var    = argv[3];
 365                 pathp  = argv[4];
 366                 prop   = argv[5];
 367
 368                 nodeoffset = fdt_path_offset(working_fdt, pathp);
 369                 if (nodeoffset < 0) {
 370                         /*
 371                          * Not found or something else bad happened.
 372                          */
 373                         printf("libfdt fdt_path_offset() returned %s\n",
 374                                 fdt_strerror(nodeoffset));
 375                         return 1;
 376                 }
 377
 378                 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
 379                         int reqIndex = -1;
 380                         int startDepth = fdt_node_depth(
 381                                 working_fdt, nodeoffset);
 382                         int curDepth = startDepth;
 383                         int curIndex = -1;
 384                         int nextNodeOffset = fdt_next_node(
 385                                 working_fdt, nodeoffset, &curDepth);
 386
 387                         if (subcmd[0] == 'n')
 388                                 reqIndex = simple_strtoul(argv[5], NULL, 16);
 389
 390                         while (curDepth > startDepth) {
 391                                 if (curDepth == startDepth + 1)
 392                                         curIndex++;
 393                                 if (subcmd[0] == 'n' && curIndex == reqIndex) {
 394                                         const char *node_name;
 395
 396                                         node_name = fdt_get_name(working_fdt,
 397                                                                  nextNodeOffset,
 398                                                                  NULL);
 399                                         env_set(var, node_name);
 400                                         return 0;
 401                                 }
 402                                 nextNodeOffset = fdt_next_node(
 403                                         working_fdt, nextNodeOffset, &curDepth);
 404                                 if (nextNodeOffset < 0)
 405                                         break;
 406                         }
 407                         if (subcmd[0] == 's') {
 408                                 /* get the num nodes at this level */
 409                                 env_set_ulong(var, curIndex + 1);
 410                         } else {
 411                                 /* node index not found */
 412                                 printf("libfdt node not found\n");
 413                                 return 1;
 414                         }
 415                 } else {
 416                         nodep = fdt_getprop(
 417                                 working_fdt, nodeoffset, prop, &len);
 418                         if (len == 0) {
 419                                 /* no property value */
 420                                 env_set(var, "");
 421                                 return 0;
 422                         } else if (nodep && len > 0) {
 423                                 if (subcmd[0] == 'v') {
 424                                         int ret;
 425
 426                                         ret = fdt_value_env_set(nodep, len,
 427                                                                 var);
 428                                         if (ret != 0)
 429                                                 return ret;
 430                                 } else if (subcmd[0] == 'a') {
 431                                         /* Get address */
 432                                         char buf[11];
 433
 434                                         sprintf(buf, "0x%p", nodep);
 435                                         env_set(var, buf);
 436                                 } else if (subcmd[0] == 's') {
 437                                         /* Get size */
 438                                         char buf[11];
 439
 440                                         sprintf(buf, "0x%08X", len);
 441                                         env_set(var, buf);
 442                                 } else
 443                                         return CMD_RET_USAGE;
 444                                 return 0;
 445                         } else {
 446                                 printf("libfdt fdt_getprop(): %s\n",
 447                                         fdt_strerror(len));
 448                                 return 1;
 449                         }
 450                 }
 451
 452         /*
 453          * Print (recursive) / List (single level)
 454          */
 455         } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
 456                 int depth = MAX_LEVEL;  /* how deep to print */
 457                 char *pathp;            /* path */
 458                 char *prop;             /* property */
 459                 int  ret;               /* return value */
 460                 static char root[2] = "/";
 461
 462                 /*
 463                  * list is an alias for print, but limited to 1 level
 464                  */
 465                 if (argv[1][0] == 'l') {
 466                         depth = 1;
 467                 }
 468
 469                 /*
 470                  * Get the starting path.  The root node is an oddball,
 471                  * the offset is zero and has no name.
 472                  */
 473                 if (argc == 2)
 474                         pathp = root;
 475                 else
 476                         pathp = argv[2];
 477                 if (argc > 3)
 478                         prop = argv[3];
 479                 else
 480                         prop = NULL;
 481
 482                 ret = fdt_print(pathp, prop, depth);
 483                 if (ret != 0)
 484                         return ret;
 485
 486         /*
 487          * Remove a property/node
 488          */
 489         } else if (strncmp(argv[1], "rm", 2) == 0) {
 490                 int  nodeoffset;        /* node offset from libfdt */
 491                 int  err;
 492
 493                 /*
 494                  * Get the path.  The root node is an oddball, the offset
 495                  * is zero and has no name.
 496                  */
 497                 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
 498                 if (nodeoffset < 0) {
 499                         /*
 500                          * Not found or something else bad happened.
 501                          */
 502                         printf ("libfdt fdt_path_offset() returned %s\n",
 503                                 fdt_strerror(nodeoffset));
 504                         return 1;
 505                 }
 506                 /*
 507                  * Do the delete.  A fourth parameter means delete a property,
 508                  * otherwise delete the node.
 509                  */
 510                 if (argc > 3) {
 511                         err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
 512                         if (err < 0) {
 513                                 printf("libfdt fdt_delprop():  %s\n",
 514                                         fdt_strerror(err));
 515                                 return err;
 516                         }
 517                 } else {
 518                         err = fdt_del_node(working_fdt, nodeoffset);
 519                         if (err < 0) {
 520                                 printf("libfdt fdt_del_node():  %s\n",
 521                                         fdt_strerror(err));
 522                                 return err;
 523                         }
 524                 }
 525
 526         /*
 527          * Display header info
 528          */
 529         } else if (argv[1][0] == 'h') {
 530                 if (argc == 5)
 531                         return fdt_get_header_value(argc, argv);
 532
 533                 u32 version = fdt_version(working_fdt);
 534                 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
 535                 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
 536                        fdt_totalsize(working_fdt));
 537                 printf("off_dt_struct:\t\t0x%x\n",
 538                        fdt_off_dt_struct(working_fdt));
 539                 printf("off_dt_strings:\t\t0x%x\n",
 540                        fdt_off_dt_strings(working_fdt));
 541                 printf("off_mem_rsvmap:\t\t0x%x\n",
 542                        fdt_off_mem_rsvmap(working_fdt));
 543                 printf("version:\t\t%d\n", version);
 544                 printf("last_comp_version:\t%d\n",
 545                        fdt_last_comp_version(working_fdt));
 546                 if (version >= 2)
 547                         printf("boot_cpuid_phys:\t0x%x\n",
 548                                 fdt_boot_cpuid_phys(working_fdt));
 549                 if (version >= 3)
 550                         printf("size_dt_strings:\t0x%x\n",
 551                                 fdt_size_dt_strings(working_fdt));
 552                 if (version >= 17)
 553                         printf("size_dt_struct:\t\t0x%x\n",
 554                                 fdt_size_dt_struct(working_fdt));
 555                 printf("number mem_rsv:\t\t0x%x\n",
 556                        fdt_num_mem_rsv(working_fdt));
 557                 printf("\n");
 558
 559         /*
 560          * Set boot cpu id
 561          */
 562         } else if (strncmp(argv[1], "boo", 3) == 0) {
 563                 unsigned long tmp = simple_strtoul(argv[2], NULL, 16);
 564                 fdt_set_boot_cpuid_phys(working_fdt, tmp);
 565
 566         /*
 567          * memory command
 568          */
 569         } else if (strncmp(argv[1], "me", 2) == 0) {
 570                 uint64_t addr, size;
 571                 int err;
 572                 addr = simple_strtoull(argv[2], NULL, 16);
 573                 size = simple_strtoull(argv[3], NULL, 16);
 574                 err = fdt_fixup_memory(working_fdt, addr, size);
 575                 if (err < 0)
 576                         return err;
 577
 578         /*
 579          * mem reserve commands
 580          */
 581         } else if (strncmp(argv[1], "rs", 2) == 0) {
 582                 if (argv[2][0] == 'p') {
 583                         uint64_t addr, size;
 584                         int total = fdt_num_mem_rsv(working_fdt);
 585                         int j, err;
 586                         printf("index\t\t   start\t\t    size\n");
 587                         printf("-------------------------------"
 588                                 "-----------------\n");
 589                         for (j = 0; j < total; j++) {
 590                                 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
 591                                 if (err < 0) {
 592                                         printf("libfdt fdt_get_mem_rsv():  %s\n",
 593                                                         fdt_strerror(err));
 594                                         return err;
 595                                 }
 596                                 printf("    %x\t%08x%08x\t%08x%08x\n", j,
 597                                         (u32)(addr >> 32),
 598                                         (u32)(addr & 0xffffffff),
 599                                         (u32)(size >> 32),
 600                                         (u32)(size & 0xffffffff));
 601                         }
 602                 } else if (argv[2][0] == 'a') {
 603                         uint64_t addr, size;
 604                         int err;
 605                         addr = simple_strtoull(argv[3], NULL, 16);
 606                         size = simple_strtoull(argv[4], NULL, 16);
 607                         err = fdt_add_mem_rsv(working_fdt, addr, size);
 608
 609                         if (err < 0) {
 610                                 printf("libfdt fdt_add_mem_rsv():  %s\n",
 611                                         fdt_strerror(err));
 612                                 return err;
 613                         }
 614                 } else if (argv[2][0] == 'd') {
 615                         unsigned long idx = simple_strtoul(argv[3], NULL, 16);
 616                         int err = fdt_del_mem_rsv(working_fdt, idx);
 617
 618                         if (err < 0) {
 619                                 printf("libfdt fdt_del_mem_rsv():  %s\n",
 620                                         fdt_strerror(err));
 621                                 return err;
 622                         }
 623                 } else {
 624                         /* Unrecognized command */
 625                         return CMD_RET_USAGE;
 626                 }
 627         }
 628 #ifdef CONFIG_OF_BOARD_SETUP
 629         /* Call the board-specific fixup routine */
 630         else if (strncmp(argv[1], "boa", 3) == 0) {
 631                 int err = ft_board_setup(working_fdt, gd->bd);
 632
 633                 if (err) {
 634                         printf("Failed to update board information in FDT: %s\n",
 635                                fdt_strerror(err));
 636                         return CMD_RET_FAILURE;
 637                 }
 638 #ifdef CONFIG_SOC_KEYSTONE
 639                 ft_board_setup_ex(working_fdt, gd->bd);
 640 #endif
 641         }
 642 #endif
 643         /* Create a chosen node */
 644         else if (strncmp(argv[1], "cho", 3) == 0) {
 645                 unsigned long initrd_start = 0, initrd_end = 0;
 646
 647                 if ((argc != 2) && (argc != 4))
 648                         return CMD_RET_USAGE;
 649
 650                 if (argc == 4) {
 651                         initrd_start = simple_strtoul(argv[2], NULL, 16);
 652                         initrd_end = simple_strtoul(argv[3], NULL, 16);
 653                 }
 654
 655                 fdt_chosen(working_fdt);
 656                 fdt_initrd(working_fdt, initrd_start, initrd_end);
 657
 658 #if defined(CONFIG_FIT_SIGNATURE)
 659         } else if (strncmp(argv[1], "che", 3) == 0) {
 660                 int cfg_noffset;
 661                 int ret;
 662                 unsigned long addr;
 663                 struct fdt_header *blob;
 664
 665                 if (!working_fdt)
 666                         return CMD_RET_FAILURE;
 667
 668                 if (argc > 2) {
 669                         addr = simple_strtoul(argv[2], NULL, 16);
 670                         blob = map_sysmem(addr, 0);
 671                 } else {
 672                         blob = (struct fdt_header *)gd->fdt_blob;
 673                 }
 674                 if (!fdt_valid(&blob))
 675                         return 1;
 676
 677                 gd->fdt_blob = blob;
 678                 cfg_noffset = fit_conf_get_node(working_fdt, NULL);
 679                 if (!cfg_noffset) {
 680                         printf("Could not find configuration node: %s\n",
 681                                fdt_strerror(cfg_noffset));
 682                         return CMD_RET_FAILURE;
 683                 }
 684
 685                 ret = fit_config_verify(working_fdt, cfg_noffset);
 686                 if (ret == 0)
 687                         return CMD_RET_SUCCESS;
 688                 else
 689                         return CMD_RET_FAILURE;
 690 #endif
 691
 692         }
 693 #ifdef CONFIG_OF_LIBFDT_OVERLAY
 694         /* apply an overlay */
 695         else if (strncmp(argv[1], "ap", 2) == 0) {
 696                 unsigned long addr;
 697                 struct fdt_header *blob;
 698                 int ret;
 699
 700                 if (argc != 3)
 701                         return CMD_RET_USAGE;
 702
 703                 if (!working_fdt)
 704                         return CMD_RET_FAILURE;
 705
 706                 addr = simple_strtoul(argv[2], NULL, 16);
 707                 blob = map_sysmem(addr, 0);
 708                 if (!fdt_valid(&blob))
 709                         return CMD_RET_FAILURE;
 710
 711                 /* apply method prints messages on error */
 712                 ret = fdt_overlay_apply_verbose(working_fdt, blob);
 713                 if (ret)
 714                         return CMD_RET_FAILURE;
 715         }
 716 #endif
 717         /* resize the fdt */
 718         else if (strncmp(argv[1], "re", 2) == 0) {
 719                 uint extrasize;
 720                 if (argc > 2)
 721                         extrasize = simple_strtoul(argv[2], NULL, 16);
 722                 else
 723                         extrasize = 0;
 724                 fdt_shrink_to_minimum(working_fdt, extrasize);
 725         }
 726         else {
 727                 /* Unrecognized command */
 728                 return CMD_RET_USAGE;
 729         }
 730
 731         return 0;
 732 }
 733
 734 /****************************************************************************/
 735
 736 /**
 737  * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
 738  *
 739  * @blobp: Pointer to FDT pointer
 740  * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
 741  */
 742 static int fdt_valid(struct fdt_header **blobp)
 743 {
 744         const void *blob = *blobp;
 745         int err;
 746
 747         if (blob == NULL) {
 748                 printf ("The address of the fdt is invalid (NULL).\n");
 749                 return 0;
 750         }
 751
 752         err = fdt_check_header(blob);
 753         if (err == 0)
 754                 return 1;       /* valid */
 755
 756         if (err < 0) {
 757                 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
 758                 /*
 759                  * Be more informative on bad version.
 760                  */
 761                 if (err == -FDT_ERR_BADVERSION) {
 762                         if (fdt_version(blob) <
 763                             FDT_FIRST_SUPPORTED_VERSION) {
 764                                 printf (" - too old, fdt %d < %d",
 765                                         fdt_version(blob),
 766                                         FDT_FIRST_SUPPORTED_VERSION);
 767                         }
 768                         if (fdt_last_comp_version(blob) >
 769                             FDT_LAST_SUPPORTED_VERSION) {
 770                                 printf (" - too new, fdt %d > %d",
 771                                         fdt_version(blob),
 772                                         FDT_LAST_SUPPORTED_VERSION);
 773                         }
 774                 }
 775                 printf("\n");
 776                 *blobp = NULL;
 777                 return 0;
 778         }
 779         return 1;
 780 }
 781
 782 /****************************************************************************/
 783
 784 /*
 785  * Parse the user's input, partially heuristic.  Valid formats:
 786  * <0x00112233 4 05>    - an array of cells.  Numbers follow standard
 787  *                      C conventions.
 788  * [00 11 22 .. nn] - byte stream
 789  * "string"     - If the the value doesn't start with "<" or "[", it is
 790  *                      treated as a string.  Note that the quotes are
 791  *                      stripped by the parser before we get the string.
 792  * newval: An array of strings containing the new property as specified
 793  *      on the command line
 794  * count: The number of strings in the array
 795  * data: A bytestream to be placed in the property
 796  * len: The length of the resulting bytestream
 797  */
 798 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
 799 {
 800         char *cp;               /* temporary char pointer */
 801         char *newp;             /* temporary newval char pointer */
 802         unsigned long tmp;      /* holds converted values */
 803         int stridx = 0;
 804
 805         *len = 0;
 806         newp = newval[0];
 807
 808         /* An array of cells */
 809         if (*newp == '<') {
 810                 newp++;
 811                 while ((*newp != '>') && (stridx < count)) {
 812                         /*
 813                          * Keep searching until we find that last ">"
 814                          * That way users don't have to escape the spaces
 815                          */
 816                         if (*newp == '\0') {
 817                                 newp = newval[++stridx];
 818                                 continue;
 819                         }
 820
 821                         cp = newp;
 822                         tmp = simple_strtoul(cp, &newp, 0);
 823                         if (*cp != '?')
 824                                 *(fdt32_t *)data = cpu_to_fdt32(tmp);
 825                         else
 826                                 newp++;
 827
 828                         data  += 4;
 829                         *len += 4;
 830
 831                         /* If the ptr didn't advance, something went wrong */
 832                         if ((newp - cp) <= 0) {
 833                                 printf("Sorry, I could not convert \"%s\"\n",
 834                                         cp);
 835                                 return 1;
 836                         }
 837
 838                         while (*newp == ' ')
 839                                 newp++;
 840                 }
 841
 842                 if (*newp != '>') {
 843                         printf("Unexpected character '%c'\n", *newp);
 844                         return 1;
 845                 }
 846         } else if (*newp == '[') {
 847                 /*
 848                  * Byte stream.  Convert the values.
 849                  */
 850                 newp++;
 851                 while ((stridx < count) && (*newp != ']')) {
 852                         while (*newp == ' ')
 853                                 newp++;
 854                         if (*newp == '\0') {
 855                                 newp = newval[++stridx];
 856                                 continue;
 857                         }
 858                         if (!isxdigit(*newp))
 859                                 break;
 860                         tmp = simple_strtoul(newp, &newp, 16);
 861                         *data++ = tmp & 0xFF;
 862                         *len    = *len + 1;
 863                 }
 864                 if (*newp != ']') {
 865                         printf("Unexpected character '%c'\n", *newp);
 866                         return 1;
 867                 }
 868         } else {
 869                 /*
 870                  * Assume it is one or more strings.  Copy it into our
 871                  * data area for convenience (including the
 872                  * terminating '\0's).
 873                  */
 874                 while (stridx < count) {
 875                         size_t length = strlen(newp) + 1;
 876                         strcpy(data, newp);
 877                         data += length;
 878                         *len += length;
 879                         newp = newval[++stridx];
 880                 }
 881         }
 882         return 0;
 883 }
 884
 885 /****************************************************************************/
 886
 887 /*
 888  * Heuristic to guess if this is a string or concatenated strings.
 889  */
 890
 891 static int is_printable_string(const void *data, int len)
 892 {
 893         const char *s = data;
 894
 895         /* zero length is not */
 896         if (len == 0)
 897                 return 0;
 898
 899         /* must terminate with zero or '\n' */
 900         if (s[len - 1] != '\0' && s[len - 1] != '\n')
 901                 return 0;
 902
 903         /* printable or a null byte (concatenated strings) */
 904         while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
 905                 /*
 906                  * If we see a null, there are three possibilities:
 907                  * 1) If len == 1, it is the end of the string, printable
 908                  * 2) Next character also a null, not printable.
 909                  * 3) Next character not a null, continue to check.
 910                  */
 911                 if (s[0] == '\0') {
 912                         if (len == 1)
 913                                 return 1;
 914                         if (s[1] == '\0')
 915                                 return 0;
 916                 }
 917                 s++;
 918                 len--;
 919         }
 920
 921         /* Not the null termination, or not done yet: not printable */
 922         if (*s != '\0' || (len != 0))
 923                 return 0;
 924
 925         return 1;
 926 }
 927
 928
 929 /*
 930  * Print the property in the best format, a heuristic guess.  Print as
 931  * a string, concatenated strings, a byte, word, double word, or (if all
 932  * else fails) it is printed as a stream of bytes.
 933  */
 934 static void print_data(const void *data, int len)
 935 {
 936         int j;
 937
 938         /* no data, don't print */
 939         if (len == 0)
 940                 return;
 941
 942         /*
 943          * It is a string, but it may have multiple strings (embedded '\0's).
 944          */
 945         if (is_printable_string(data, len)) {
 946                 puts("\"");
 947                 j = 0;
 948                 while (j < len) {
 949                         if (j > 0)
 950                                 puts("\", \"");
 951                         puts(data);
 952                         j    += strlen(data) + 1;
 953                         data += strlen(data) + 1;
 954                 }
 955                 puts("\"");
 956                 return;
 957         }
 958
 959         if ((len %4) == 0) {
 960                 if (len > CMD_FDT_MAX_DUMP)
 961                         printf("* 0x%p [0x%08x]", data, len);
 962                 else {
 963                         const __be32 *p;
 964
 965                         printf("<");
 966                         for (j = 0, p = data; j < len/4; j++)
 967                                 printf("0x%08x%s", fdt32_to_cpu(p[j]),
 968                                         j < (len/4 - 1) ? " " : "");
 969                         printf(">");
 970                 }
 971         } else { /* anything else... hexdump */
 972                 if (len > CMD_FDT_MAX_DUMP)
 973                         printf("* 0x%p [0x%08x]", data, len);
 974                 else {
 975                         const u8 *s;
 976
 977                         printf("[");
 978                         for (j = 0, s = data; j < len; j++)
 979                                 printf("%02x%s", s[j], j < len - 1 ? " " : "");
 980                         printf("]");
 981                 }
 982         }
 983 }
 984
 985 /****************************************************************************/
 986
 987 /*
 988  * Recursively print (a portion of) the working_fdt.  The depth parameter
 989  * determines how deeply nested the fdt is printed.
 990  */
 991 static int fdt_print(const char *pathp, char *prop, int depth)
 992 {
 993         static char tabs[MAX_LEVEL+1] =
 994                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
 995                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
 996         const void *nodep;      /* property node pointer */
 997         int  nodeoffset;        /* node offset from libfdt */
 998         int  nextoffset;        /* next node offset from libfdt */
 999         uint32_t tag;           /* tag */
1000         int  len;               /* length of the property */
1001         int  level = 0;         /* keep track of nesting level */
1002         const struct fdt_property *fdt_prop;
1003
1004         nodeoffset = fdt_path_offset (working_fdt, pathp);
1005         if (nodeoffset < 0) {
1006                 /*
1007                  * Not found or something else bad happened.
1008                  */
1009                 printf ("libfdt fdt_path_offset() returned %s\n",
1010                         fdt_strerror(nodeoffset));
1011                 return 1;
1012         }
1013         /*
1014          * The user passed in a property as well as node path.
1015          * Print only the given property and then return.
1016          */
1017         if (prop) {
1018                 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
1019                 if (len == 0) {
1020                         /* no property value */
1021                         printf("%s %s\n", pathp, prop);
1022                         return 0;
1023                 } else if (nodep && len > 0) {
1024                         printf("%s = ", prop);
1025                         print_data (nodep, len);
1026                         printf("\n");
1027                         return 0;
1028                 } else {
1029                         printf ("libfdt fdt_getprop(): %s\n",
1030                                 fdt_strerror(len));
1031                         return 1;
1032                 }
1033         }
1034
1035         /*
1036          * The user passed in a node path and no property,
1037          * print the node and all subnodes.
1038          */
1039         while(level >= 0) {
1040                 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
1041                 switch(tag) {
1042                 case FDT_BEGIN_NODE:
1043                         pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
1044                         if (level <= depth) {
1045                                 if (pathp == NULL)
1046                                         pathp = "/* NULL pointer error */";
1047                                 if (*pathp == '\0')
1048                                         pathp = "/";    /* root is nameless */
1049                                 printf("%s%s {\n",
1050                                         &tabs[MAX_LEVEL - level], pathp);
1051                         }
1052                         level++;
1053                         if (level >= MAX_LEVEL) {
1054                                 printf("Nested too deep, aborting.\n");
1055                                 return 1;
1056                         }
1057                         break;
1058                 case FDT_END_NODE:
1059                         level--;
1060                         if (level <= depth)
1061                                 printf("%s};\n", &tabs[MAX_LEVEL - level]);
1062                         if (level == 0) {
1063                                 level = -1;             /* exit the loop */
1064                         }
1065                         break;
1066                 case FDT_PROP:
1067                         fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
1068                                         sizeof(*fdt_prop));
1069                         pathp    = fdt_string(working_fdt,
1070                                         fdt32_to_cpu(fdt_prop->nameoff));
1071                         len      = fdt32_to_cpu(fdt_prop->len);
1072                         nodep    = fdt_prop->data;
1073                         if (len < 0) {
1074                                 printf ("libfdt fdt_getprop(): %s\n",
1075                                         fdt_strerror(len));
1076                                 return 1;
1077                         } else if (len == 0) {
1078                                 /* the property has no value */
1079                                 if (level <= depth)
1080                                         printf("%s%s;\n",
1081                                                 &tabs[MAX_LEVEL - level],
1082                                                 pathp);
1083                         } else {
1084                                 if (level <= depth) {
1085                                         printf("%s%s = ",
1086                                                 &tabs[MAX_LEVEL - level],
1087                                                 pathp);
1088                                         print_data (nodep, len);
1089                                         printf(";\n");
1090                                 }
1091                         }
1092                         break;
1093                 case FDT_NOP:
1094                         printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
1095                         break;
1096                 case FDT_END:
1097                         return 1;
1098                 default:
1099                         if (level <= depth)
1100                                 printf("Unknown tag 0x%08X\n", tag);
1101                         return 1;
1102                 }
1103                 nodeoffset = nextoffset;
1104         }
1105         return 0;
1106 }
1107
1108 /********************************************************************/
1109 #ifdef CONFIG_SYS_LONGHELP
1110 static char fdt_help_text[] =
1111         "addr [-c]  <addr> [<length>]   - Set the [control] fdt location to <addr>\n"
1112 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1113         "fdt apply <addr>                    - Apply overlay to the DT\n"
1114 #endif
1115 #ifdef CONFIG_OF_BOARD_SETUP
1116         "fdt boardsetup                      - Do board-specific set up\n"
1117 #endif
1118 #ifdef CONFIG_OF_SYSTEM_SETUP
1119         "fdt systemsetup                     - Do system-specific set up\n"
1120 #endif
1121         "fdt move   <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1122         "fdt resize [<extrasize>]            - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1123         "fdt print  <path> [<prop>]          - Recursive print starting at <path>\n"
1124         "fdt list   <path> [<prop>]          - Print one level starting at <path>\n"
1125         "fdt get value <var> <path> <prop>   - Get <property> and store in <var>\n"
1126         "fdt get name <var> <path> <index>   - Get name of node <index> and store in <var>\n"
1127         "fdt get addr <var> <path> <prop>    - Get start address of <property> and store in <var>\n"
1128         "fdt get size <var> <path> [<prop>]  - Get size of [<property>] or num nodes and store in <var>\n"
1129         "fdt set    <path> <prop> [<val>]    - Set <property> [to <val>]\n"
1130         "fdt mknode <path> <node>            - Create a new node after <path>\n"
1131         "fdt rm     <path> [<prop>]          - Delete the node or <property>\n"
1132         "fdt header [get <var> <member>]     - Display header info\n"
1133         "                                      get - get header member <member> and store it in <var>\n"
1134         "fdt bootcpu <id>                    - Set boot cpuid\n"
1135         "fdt memory <addr> <size>            - Add/Update memory node\n"
1136         "fdt rsvmem print                    - Show current mem reserves\n"
1137         "fdt rsvmem add <addr> <size>        - Add a mem reserve\n"
1138         "fdt rsvmem delete <index>           - Delete a mem reserves\n"
1139         "fdt chosen [<start> <end>]          - Add/update the /chosen branch in the tree\n"
1140         "                                        <start>/<end> - initrd start/end addr\n"
1141 #if defined(CONFIG_FIT_SIGNATURE)
1142         "fdt checksign [<addr>]              - check FIT signature\n"
1143         "                                        <start> - addr of key blob\n"
1144         "                                                  default gd->fdt_blob\n"
1145 #endif
1146         "NOTE: Dereference aliases by omitting the leading '/', "
1147                 "e.g. fdt print ethernet0.";
1148 #endif
1149
1150 U_BOOT_CMD(
1151         fdt,    255,    0,      do_fdt,
1152         "flattened device tree utility commands", fdt_help_text
1153 );