cmd/fdt.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2007
   4  * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
   5  * Based on code written by:
   6  *   Pantelis Antoniou <pantelis.antoniou@gmail.com> and
   7  *   Matthew McClintock <msm@freescale.com>
   8  */
   9
  10 #include <common.h>
  11 #include <command.h>
  12 #include <env.h>
  13 #include <image.h>
  14 #include <linux/ctype.h>
  15 #include <linux/types.h>
  16 #include <asm/global_data.h>
  17 #include <linux/libfdt.h>
  18 #include <fdt_support.h>
  19 #include <mapmem.h>
  20 #include <asm/io.h>
  21
  22 #define MAX_LEVEL       32              /* how deeply nested we will go */
  23 #define SCRATCHPAD      1024            /* bytes of scratchpad memory */
  24
  25 /*
  26  * Global data (for the gd->bd)
  27  */
  28 DECLARE_GLOBAL_DATA_PTR;
  29
  30 static int fdt_parse_prop(char *const*newval, int count, char *data, int *len);
  31 static int fdt_print(const char *pathp, char *prop, int depth);
  32 static int is_printable_string(const void *data, int len);
  33
  34 /*
  35  * The working_fdt points to our working flattened device tree.
  36  */
  37 struct fdt_header *working_fdt;
  38
  39 void set_working_fdt_addr(ulong addr)
  40 {
  41         void *buf;
  42
  43         buf = map_sysmem(addr, 0);
  44         working_fdt = buf;
  45         env_set_hex("fdtaddr", addr);
  46 }
  47
  48 /*
  49  * Get a value from the fdt and format it to be set in the environment
  50  */
  51 static int fdt_value_env_set(const void *nodep, int len, const char *var)
  52 {
  53         if (is_printable_string(nodep, len))
  54                 env_set(var, (void *)nodep);
  55         else if (len == 4) {
  56                 char buf[11];
  57
  58                 sprintf(buf, "0x%08X", fdt32_to_cpu(*(fdt32_t *)nodep));
  59                 env_set(var, buf);
  60         } else if (len%4 == 0 && len <= 20) {
  61                 /* Needed to print things like sha1 hashes. */
  62                 char buf[41];
  63                 int i;
  64
  65                 for (i = 0; i < len; i += sizeof(unsigned int))
  66                         sprintf(buf + (i * 2), "%08x",
  67                                 *(unsigned int *)(nodep + i));
  68                 env_set(var, buf);
  69         } else {
  70                 printf("error: unprintable value\n");
  71                 return 1;
  72         }
  73         return 0;
  74 }
  75
  76 static const char * const fdt_member_table[] = {
  77         "magic",
  78         "totalsize",
  79         "off_dt_struct",
  80         "off_dt_strings",
  81         "off_mem_rsvmap",
  82         "version",
  83         "last_comp_version",
  84         "boot_cpuid_phys",
  85         "size_dt_strings",
  86         "size_dt_struct",
  87 };
  88
  89 static int fdt_get_header_value(int argc, char *const argv[])
  90 {
  91         fdt32_t *fdtp = (fdt32_t *)working_fdt;
  92         ulong val;
  93         int i;
  94
  95         if (argv[2][0] != 'g')
  96                 return CMD_RET_FAILURE;
  97
  98         for (i = 0; i < ARRAY_SIZE(fdt_member_table); i++) {
  99                 if (strcmp(fdt_member_table[i], argv[4]))
 100                         continue;
 101
 102                 val = fdt32_to_cpu(fdtp[i]);
 103                 env_set_hex(argv[3], val);
 104                 return CMD_RET_SUCCESS;
 105         }
 106
 107         return CMD_RET_FAILURE;
 108 }
 109
 110 /*
 111  * Flattened Device Tree command, see the help for parameter definitions.
 112  */
 113 static int do_fdt(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 114 {
 115         if (argc < 2)
 116                 return CMD_RET_USAGE;
 117
 118         /* fdt addr: Set the address of the fdt */
 119         if (strncmp(argv[1], "ad", 2) == 0) {
 120                 unsigned long addr;
 121                 int control = 0;
 122                 int quiet = 0;
 123                 struct fdt_header *blob;
 124
 125                 /* Set the address [and length] of the fdt */
 126                 argc -= 2;
 127                 argv += 2;
 128                 while (argc > 0 && **argv == '-') {
 129                         char *arg = *argv;
 130
 131                         while (*++arg) {
 132                                 switch (*arg) {
 133                                 case 'c':
 134                                         control = 1;
 135                                         break;
 136                                 case 'q':
 137                                         quiet = 1;
 138                                         break;
 139                                 default:
 140                                         return CMD_RET_USAGE;
 141                                 }
 142                         }
 143                         argc--;
 144                         argv++;
 145                 }
 146                 if (argc == 0) {
 147                         if (control)
 148                                 blob = (struct fdt_header *)gd->fdt_blob;
 149                         else
 150                                 blob = working_fdt;
 151                         if (!blob || !fdt_valid(&blob))
 152                                 return 1;
 153                         printf("%s fdt: %08lx\n",
 154                                control ? "Control" : "Working",
 155                                control ? (ulong)map_to_sysmem(blob) :
 156                                env_get_hex("fdtaddr", 0));
 157                         return 0;
 158                 }
 159
 160                 addr = hextoul(argv[0], NULL);
 161                 blob = map_sysmem(addr, 0);
 162                 if ((quiet && fdt_check_header(blob)) ||
 163                     (!quiet && !fdt_valid(&blob)))
 164                         return 1;
 165                 if (control)
 166                         gd->fdt_blob = blob;
 167                 else
 168                         set_working_fdt_addr(addr);
 169
 170                 if (argc >= 2) {
 171                         int  len;
 172                         int  err;
 173
 174                         /* Optional new length */
 175                         len = hextoul(argv[1], NULL);
 176                         if (len < fdt_totalsize(blob)) {
 177                                 if (!quiet)
 178                                         printf("New length %d < existing length %d, ignoring\n",
 179                                                len, fdt_totalsize(blob));
 180                         } else {
 181                                 /* Open in place with a new length */
 182                                 err = fdt_open_into(blob, blob, len);
 183                                 if (!quiet && err != 0) {
 184                                         printf("libfdt fdt_open_into(): %s\n",
 185                                                fdt_strerror(err));
 186                                 }
 187                         }
 188                 }
 189
 190                 return CMD_RET_SUCCESS;
 191         }
 192
 193         if (!working_fdt) {
 194                 puts("No FDT memory address configured. Please configure\n"
 195                      "the FDT address via \"fdt addr <address>\" command.\n"
 196                      "Aborting!\n");
 197                 return CMD_RET_FAILURE;
 198         }
 199
 200         /*
 201          * Move the working_fdt
 202          */
 203         if (strncmp(argv[1], "mo", 2) == 0) {
 204                 struct fdt_header *newaddr;
 205                 int  len;
 206                 int  err;
 207
 208                 if (argc < 4)
 209                         return CMD_RET_USAGE;
 210
 211                 /*
 212                  * Set the address and length of the fdt.
 213                  */
 214                 working_fdt = (struct fdt_header *)hextoul(argv[2], NULL);
 215                 if (!fdt_valid(&working_fdt))
 216                         return 1;
 217
 218                 newaddr = (struct fdt_header *)hextoul(argv[3], NULL);
 219
 220                 /*
 221                  * If the user specifies a length, use that.  Otherwise use the
 222                  * current length.
 223                  */
 224                 if (argc <= 4) {
 225                         len = fdt_totalsize(working_fdt);
 226                 } else {
 227                         len = hextoul(argv[4], NULL);
 228                         if (len < fdt_totalsize(working_fdt)) {
 229                                 printf ("New length 0x%X < existing length "
 230                                         "0x%X, aborting.\n",
 231                                         len, fdt_totalsize(working_fdt));
 232                                 return 1;
 233                         }
 234                 }
 235
 236                 /*
 237                  * Copy to the new location.
 238                  */
 239                 err = fdt_open_into(working_fdt, newaddr, len);
 240                 if (err != 0) {
 241                         printf ("libfdt fdt_open_into(): %s\n",
 242                                 fdt_strerror(err));
 243                         return 1;
 244                 }
 245                 set_working_fdt_addr((ulong)newaddr);
 246 #ifdef CONFIG_OF_SYSTEM_SETUP
 247         /* Call the board-specific fixup routine */
 248         } else if (strncmp(argv[1], "sys", 3) == 0) {
 249                 int err = ft_system_setup(working_fdt, gd->bd);
 250
 251                 if (err) {
 252                         printf("Failed to add system information to FDT: %s\n",
 253                                fdt_strerror(err));
 254                         return CMD_RET_FAILURE;
 255                 }
 256 #endif
 257         /*
 258          * Make a new node
 259          */
 260         } else if (strncmp(argv[1], "mk", 2) == 0) {
 261                 char *pathp;            /* path */
 262                 char *nodep;            /* new node to add */
 263                 int  nodeoffset;        /* node offset from libfdt */
 264                 int  err;
 265
 266                 /*
 267                  * Parameters: Node path, new node to be appended to the path.
 268                  */
 269                 if (argc < 4)
 270                         return CMD_RET_USAGE;
 271
 272                 pathp = argv[2];
 273                 nodep = argv[3];
 274
 275                 nodeoffset = fdt_path_offset (working_fdt, pathp);
 276                 if (nodeoffset < 0) {
 277                         /*
 278                          * Not found or something else bad happened.
 279                          */
 280                         printf ("libfdt fdt_path_offset() returned %s\n",
 281                                 fdt_strerror(nodeoffset));
 282                         return 1;
 283                 }
 284                 err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
 285                 if (err < 0) {
 286                         printf ("libfdt fdt_add_subnode(): %s\n",
 287                                 fdt_strerror(err));
 288                         return 1;
 289                 }
 290
 291         /*
 292          * Set the value of a property in the working_fdt.
 293          */
 294         } else if (strncmp(argv[1], "se", 2) == 0) {
 295                 char *pathp;            /* path */
 296                 char *prop;             /* property */
 297                 int  nodeoffset;        /* node offset from libfdt */
 298                 static char data[SCRATCHPAD] __aligned(4);/* property storage */
 299                 const void *ptmp;
 300                 int  len;               /* new length of the property */
 301                 int  ret;               /* return value */
 302
 303                 /*
 304                  * Parameters: Node path, property, optional value.
 305                  */
 306                 if (argc < 4)
 307                         return CMD_RET_USAGE;
 308
 309                 pathp  = argv[2];
 310                 prop   = argv[3];
 311
 312                 nodeoffset = fdt_path_offset (working_fdt, pathp);
 313                 if (nodeoffset < 0) {
 314                         /*
 315                          * Not found or something else bad happened.
 316                          */
 317                         printf ("libfdt fdt_path_offset() returned %s\n",
 318                                 fdt_strerror(nodeoffset));
 319                         return 1;
 320                 }
 321
 322                 if (argc == 4) {
 323                         len = 0;
 324                 } else {
 325                         ptmp = fdt_getprop(working_fdt, nodeoffset, prop, &len);
 326                         if (len > SCRATCHPAD) {
 327                                 printf("prop (%d) doesn't fit in scratchpad!\n",
 328                                        len);
 329                                 return 1;
 330                         }
 331                         if (ptmp != NULL)
 332                                 memcpy(data, ptmp, len);
 333
 334                         ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
 335                         if (ret != 0)
 336                                 return ret;
 337                 }
 338
 339                 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
 340                 if (ret < 0) {
 341                         printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
 342                         return 1;
 343                 }
 344
 345         /********************************************************************
 346          * Get the value of a property in the working_fdt.
 347          ********************************************************************/
 348         } else if (argv[1][0] == 'g') {
 349                 char *subcmd;           /* sub-command */
 350                 char *pathp;            /* path */
 351                 char *prop;             /* property */
 352                 char *var;              /* variable to store result */
 353                 int  nodeoffset;        /* node offset from libfdt */
 354                 const void *nodep;      /* property node pointer */
 355                 int  len = 0;           /* new length of the property */
 356
 357                 /*
 358                  * Parameters: Node path, property, optional value.
 359                  */
 360                 if (argc < 5)
 361                         return CMD_RET_USAGE;
 362
 363                 subcmd = argv[2];
 364
 365                 if (argc < 6 && subcmd[0] != 's')
 366                         return CMD_RET_USAGE;
 367
 368                 var    = argv[3];
 369                 pathp  = argv[4];
 370                 prop   = argv[5];
 371
 372                 nodeoffset = fdt_path_offset(working_fdt, pathp);
 373                 if (nodeoffset < 0) {
 374                         /*
 375                          * Not found or something else bad happened.
 376                          */
 377                         printf("libfdt fdt_path_offset() returned %s\n",
 378                                 fdt_strerror(nodeoffset));
 379                         return 1;
 380                 }
 381
 382                 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
 383                         int req_index = -1;
 384                         int startDepth = fdt_node_depth(
 385                                 working_fdt, nodeoffset);
 386                         int curDepth = startDepth;
 387                         int cur_index = -1;
 388                         int nextNodeOffset = fdt_next_node(
 389                                 working_fdt, nodeoffset, &curDepth);
 390
 391                         if (subcmd[0] == 'n')
 392                                 req_index = hextoul(argv[5], NULL);
 393
 394                         while (curDepth > startDepth) {
 395                                 if (curDepth == startDepth + 1)
 396                                         cur_index++;
 397                                 if (subcmd[0] == 'n' &&
 398                                     cur_index == req_index) {
 399                                         const char *node_name;
 400
 401                                         node_name = fdt_get_name(working_fdt,
 402                                                                  nextNodeOffset,
 403                                                                  NULL);
 404                                         env_set(var, node_name);
 405                                         return 0;
 406                                 }
 407                                 nextNodeOffset = fdt_next_node(
 408                                         working_fdt, nextNodeOffset, &curDepth);
 409                                 if (nextNodeOffset < 0)
 410                                         break;
 411                         }
 412                         if (subcmd[0] == 's') {
 413                                 /* get the num nodes at this level */
 414                                 env_set_ulong(var, cur_index + 1);
 415                         } else {
 416                                 /* node index not found */
 417                                 printf("libfdt node not found\n");
 418                                 return 1;
 419                         }
 420                 } else {
 421                         nodep = fdt_getprop(
 422                                 working_fdt, nodeoffset, prop, &len);
 423                         if (len == 0) {
 424                                 /* no property value */
 425                                 env_set(var, "");
 426                                 return 0;
 427                         } else if (nodep && len > 0) {
 428                                 if (subcmd[0] == 'v') {
 429                                         int ret;
 430
 431                                         ret = fdt_value_env_set(nodep, len,
 432                                                                 var);
 433                                         if (ret != 0)
 434                                                 return ret;
 435                                 } else if (subcmd[0] == 'a') {
 436                                         /* Get address */
 437                                         char buf[11];
 438
 439                                         sprintf(buf, "0x%p", nodep);
 440                                         env_set(var, buf);
 441                                 } else if (subcmd[0] == 's') {
 442                                         /* Get size */
 443                                         char buf[11];
 444
 445                                         sprintf(buf, "0x%08X", len);
 446                                         env_set(var, buf);
 447                                 } else
 448                                         return CMD_RET_USAGE;
 449                                 return 0;
 450                         } else {
 451                                 printf("libfdt fdt_getprop(): %s\n",
 452                                         fdt_strerror(len));
 453                                 return 1;
 454                         }
 455                 }
 456
 457         /*
 458          * Print (recursive) / List (single level)
 459          */
 460         } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
 461                 int depth = MAX_LEVEL;  /* how deep to print */
 462                 char *pathp;            /* path */
 463                 char *prop;             /* property */
 464                 int  ret;               /* return value */
 465                 static char root[2] = "/";
 466
 467                 /*
 468                  * list is an alias for print, but limited to 1 level
 469                  */
 470                 if (argv[1][0] == 'l') {
 471                         depth = 1;
 472                 }
 473
 474                 /*
 475                  * Get the starting path.  The root node is an oddball,
 476                  * the offset is zero and has no name.
 477                  */
 478                 if (argc == 2)
 479                         pathp = root;
 480                 else
 481                         pathp = argv[2];
 482                 if (argc > 3)
 483                         prop = argv[3];
 484                 else
 485                         prop = NULL;
 486
 487                 ret = fdt_print(pathp, prop, depth);
 488                 if (ret != 0)
 489                         return ret;
 490
 491         /*
 492          * Remove a property/node
 493          */
 494         } else if (strncmp(argv[1], "rm", 2) == 0) {
 495                 int  nodeoffset;        /* node offset from libfdt */
 496                 int  err;
 497
 498                 /*
 499                  * Get the path.  The root node is an oddball, the offset
 500                  * is zero and has no name.
 501                  */
 502                 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
 503                 if (nodeoffset < 0) {
 504                         /*
 505                          * Not found or something else bad happened.
 506                          */
 507                         printf ("libfdt fdt_path_offset() returned %s\n",
 508                                 fdt_strerror(nodeoffset));
 509                         return 1;
 510                 }
 511                 /*
 512                  * Do the delete.  A fourth parameter means delete a property,
 513                  * otherwise delete the node.
 514                  */
 515                 if (argc > 3) {
 516                         err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
 517                         if (err < 0) {
 518                                 printf("libfdt fdt_delprop():  %s\n",
 519                                         fdt_strerror(err));
 520                                 return err;
 521                         }
 522                 } else {
 523                         err = fdt_del_node(working_fdt, nodeoffset);
 524                         if (err < 0) {
 525                                 printf("libfdt fdt_del_node():  %s\n",
 526                                         fdt_strerror(err));
 527                                 return err;
 528                         }
 529                 }
 530
 531         /*
 532          * Display header info
 533          */
 534         } else if (argv[1][0] == 'h') {
 535                 if (argc == 5)
 536                         return fdt_get_header_value(argc, argv);
 537
 538                 u32 version = fdt_version(working_fdt);
 539                 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
 540                 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
 541                        fdt_totalsize(working_fdt));
 542                 printf("off_dt_struct:\t\t0x%x\n",
 543                        fdt_off_dt_struct(working_fdt));
 544                 printf("off_dt_strings:\t\t0x%x\n",
 545                        fdt_off_dt_strings(working_fdt));
 546                 printf("off_mem_rsvmap:\t\t0x%x\n",
 547                        fdt_off_mem_rsvmap(working_fdt));
 548                 printf("version:\t\t%d\n", version);
 549                 printf("last_comp_version:\t%d\n",
 550                        fdt_last_comp_version(working_fdt));
 551                 if (version >= 2)
 552                         printf("boot_cpuid_phys:\t0x%x\n",
 553                                 fdt_boot_cpuid_phys(working_fdt));
 554                 if (version >= 3)
 555                         printf("size_dt_strings:\t0x%x\n",
 556                                 fdt_size_dt_strings(working_fdt));
 557                 if (version >= 17)
 558                         printf("size_dt_struct:\t\t0x%x\n",
 559                                 fdt_size_dt_struct(working_fdt));
 560                 printf("number mem_rsv:\t\t0x%x\n",
 561                        fdt_num_mem_rsv(working_fdt));
 562                 printf("\n");
 563
 564         /*
 565          * Set boot cpu id
 566          */
 567         } else if (strncmp(argv[1], "boo", 3) == 0) {
 568                 unsigned long tmp = hextoul(argv[2], NULL);
 569                 fdt_set_boot_cpuid_phys(working_fdt, tmp);
 570
 571         /*
 572          * memory command
 573          */
 574         } else if (strncmp(argv[1], "me", 2) == 0) {
 575                 uint64_t addr, size;
 576                 int err;
 577                 addr = simple_strtoull(argv[2], NULL, 16);
 578                 size = simple_strtoull(argv[3], NULL, 16);
 579                 err = fdt_fixup_memory(working_fdt, addr, size);
 580                 if (err < 0)
 581                         return err;
 582
 583         /*
 584          * mem reserve commands
 585          */
 586         } else if (strncmp(argv[1], "rs", 2) == 0) {
 587                 if (argv[2][0] == 'p') {
 588                         uint64_t addr, size;
 589                         int total = fdt_num_mem_rsv(working_fdt);
 590                         int j, err;
 591                         printf("index\t\t   start\t\t    size\n");
 592                         printf("-------------------------------"
 593                                 "-----------------\n");
 594                         for (j = 0; j < total; j++) {
 595                                 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
 596                                 if (err < 0) {
 597                                         printf("libfdt fdt_get_mem_rsv():  %s\n",
 598                                                         fdt_strerror(err));
 599                                         return err;
 600                                 }
 601                                 printf("    %x\t%08x%08x\t%08x%08x\n", j,
 602                                         (u32)(addr >> 32),
 603                                         (u32)(addr & 0xffffffff),
 604                                         (u32)(size >> 32),
 605                                         (u32)(size & 0xffffffff));
 606                         }
 607                 } else if (argv[2][0] == 'a') {
 608                         uint64_t addr, size;
 609                         int err;
 610                         addr = simple_strtoull(argv[3], NULL, 16);
 611                         size = simple_strtoull(argv[4], NULL, 16);
 612                         err = fdt_add_mem_rsv(working_fdt, addr, size);
 613
 614                         if (err < 0) {
 615                                 printf("libfdt fdt_add_mem_rsv():  %s\n",
 616                                         fdt_strerror(err));
 617                                 return err;
 618                         }
 619                 } else if (argv[2][0] == 'd') {
 620                         unsigned long idx = hextoul(argv[3], NULL);
 621                         int err = fdt_del_mem_rsv(working_fdt, idx);
 622
 623                         if (err < 0) {
 624                                 printf("libfdt fdt_del_mem_rsv():  %s\n",
 625                                         fdt_strerror(err));
 626                                 return err;
 627                         }
 628                 } else {
 629                         /* Unrecognized command */
 630                         return CMD_RET_USAGE;
 631                 }
 632         }
 633 #ifdef CONFIG_OF_BOARD_SETUP
 634         /* Call the board-specific fixup routine */
 635         else if (strncmp(argv[1], "boa", 3) == 0) {
 636                 int err = ft_board_setup(working_fdt, gd->bd);
 637
 638                 if (err) {
 639                         printf("Failed to update board information in FDT: %s\n",
 640                                fdt_strerror(err));
 641                         return CMD_RET_FAILURE;
 642                 }
 643 #ifdef CONFIG_ARCH_KEYSTONE
 644                 ft_board_setup_ex(working_fdt, gd->bd);
 645 #endif
 646         }
 647 #endif
 648         /* Create a chosen node */
 649         else if (strncmp(argv[1], "cho", 3) == 0) {
 650                 unsigned long initrd_start = 0, initrd_end = 0;
 651
 652                 if ((argc != 2) && (argc != 4))
 653                         return CMD_RET_USAGE;
 654
 655                 if (argc == 4) {
 656                         initrd_start = hextoul(argv[2], NULL);
 657                         initrd_end = initrd_start + hextoul(argv[3], NULL) - 1;
 658                 }
 659
 660                 fdt_chosen(working_fdt);
 661                 fdt_initrd(working_fdt, initrd_start, initrd_end);
 662
 663 #if defined(CONFIG_FIT_SIGNATURE)
 664         } else if (strncmp(argv[1], "che", 3) == 0) {
 665                 int cfg_noffset;
 666                 int ret;
 667                 unsigned long addr;
 668                 struct fdt_header *blob;
 669
 670                 if (!working_fdt)
 671                         return CMD_RET_FAILURE;
 672
 673                 if (argc > 2) {
 674                         addr = hextoul(argv[2], NULL);
 675                         blob = map_sysmem(addr, 0);
 676                 } else {
 677                         blob = (struct fdt_header *)gd->fdt_blob;
 678                 }
 679                 if (!fdt_valid(&blob))
 680                         return 1;
 681
 682                 gd->fdt_blob = blob;
 683                 cfg_noffset = fit_conf_get_node(working_fdt, NULL);
 684                 if (!cfg_noffset) {
 685                         printf("Could not find configuration node: %s\n",
 686                                fdt_strerror(cfg_noffset));
 687                         return CMD_RET_FAILURE;
 688                 }
 689
 690                 ret = fit_config_verify(working_fdt, cfg_noffset);
 691                 if (ret == 0)
 692                         return CMD_RET_SUCCESS;
 693                 else
 694                         return CMD_RET_FAILURE;
 695 #endif
 696
 697         }
 698 #ifdef CONFIG_OF_LIBFDT_OVERLAY
 699         /* apply an overlay */
 700         else if (strncmp(argv[1], "ap", 2) == 0) {
 701                 unsigned long addr;
 702                 struct fdt_header *blob;
 703                 int ret;
 704
 705                 if (argc != 3)
 706                         return CMD_RET_USAGE;
 707
 708                 if (!working_fdt)
 709                         return CMD_RET_FAILURE;
 710
 711                 addr = hextoul(argv[2], NULL);
 712                 blob = map_sysmem(addr, 0);
 713                 if (!fdt_valid(&blob))
 714                         return CMD_RET_FAILURE;
 715
 716                 /* apply method prints messages on error */
 717                 ret = fdt_overlay_apply_verbose(working_fdt, blob);
 718                 if (ret)
 719                         return CMD_RET_FAILURE;
 720         }
 721 #endif
 722         /* resize the fdt */
 723         else if (strncmp(argv[1], "re", 2) == 0) {
 724                 uint extrasize;
 725                 if (argc > 2)
 726                         extrasize = hextoul(argv[2], NULL);
 727                 else
 728                         extrasize = 0;
 729                 fdt_shrink_to_minimum(working_fdt, extrasize);
 730         }
 731         else {
 732                 /* Unrecognized command */
 733                 return CMD_RET_USAGE;
 734         }
 735
 736         return 0;
 737 }
 738
 739 /****************************************************************************/
 740
 741 /*
 742  * Parse the user's input, partially heuristic.  Valid formats:
 743  * <0x00112233 4 05>    - an array of cells.  Numbers follow standard
 744  *                      C conventions.
 745  * [00 11 22 .. nn] - byte stream
 746  * "string"     - If the the value doesn't start with "<" or "[", it is
 747  *                      treated as a string.  Note that the quotes are
 748  *                      stripped by the parser before we get the string.
 749  * newval: An array of strings containing the new property as specified
 750  *      on the command line
 751  * count: The number of strings in the array
 752  * data: A bytestream to be placed in the property
 753  * len: The length of the resulting bytestream
 754  */
 755 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
 756 {
 757         char *cp;               /* temporary char pointer */
 758         char *newp;             /* temporary newval char pointer */
 759         unsigned long tmp;      /* holds converted values */
 760         int stridx = 0;
 761
 762         *len = 0;
 763         newp = newval[0];
 764
 765         /* An array of cells */
 766         if (*newp == '<') {
 767                 newp++;
 768                 while ((*newp != '>') && (stridx < count)) {
 769                         /*
 770                          * Keep searching until we find that last ">"
 771                          * That way users don't have to escape the spaces
 772                          */
 773                         if (*newp == '\0') {
 774                                 newp = newval[++stridx];
 775                                 continue;
 776                         }
 777
 778                         cp = newp;
 779                         tmp = simple_strtoul(cp, &newp, 0);
 780                         if (*cp != '?')
 781                                 *(fdt32_t *)data = cpu_to_fdt32(tmp);
 782                         else
 783                                 newp++;
 784
 785                         data  += 4;
 786                         *len += 4;
 787
 788                         /* If the ptr didn't advance, something went wrong */
 789                         if ((newp - cp) <= 0) {
 790                                 printf("Sorry, I could not convert \"%s\"\n",
 791                                         cp);
 792                                 return 1;
 793                         }
 794
 795                         while (*newp == ' ')
 796                                 newp++;
 797                 }
 798
 799                 if (*newp != '>') {
 800                         printf("Unexpected character '%c'\n", *newp);
 801                         return 1;
 802                 }
 803         } else if (*newp == '[') {
 804                 /*
 805                  * Byte stream.  Convert the values.
 806                  */
 807                 newp++;
 808                 while ((stridx < count) && (*newp != ']')) {
 809                         while (*newp == ' ')
 810                                 newp++;
 811                         if (*newp == '\0') {
 812                                 newp = newval[++stridx];
 813                                 continue;
 814                         }
 815                         if (!isxdigit(*newp))
 816                                 break;
 817                         tmp = hextoul(newp, &newp);
 818                         *data++ = tmp & 0xFF;
 819                         *len    = *len + 1;
 820                 }
 821                 if (*newp != ']') {
 822                         printf("Unexpected character '%c'\n", *newp);
 823                         return 1;
 824                 }
 825         } else {
 826                 /*
 827                  * Assume it is one or more strings.  Copy it into our
 828                  * data area for convenience (including the
 829                  * terminating '\0's).
 830                  */
 831                 while (stridx < count) {
 832                         size_t length = strlen(newp) + 1;
 833                         strcpy(data, newp);
 834                         data += length;
 835                         *len += length;
 836                         newp = newval[++stridx];
 837                 }
 838         }
 839         return 0;
 840 }
 841
 842 /****************************************************************************/
 843
 844 /*
 845  * Heuristic to guess if this is a string or concatenated strings.
 846  */
 847
 848 static int is_printable_string(const void *data, int len)
 849 {
 850         const char *s = data;
 851
 852         /* zero length is not */
 853         if (len == 0)
 854                 return 0;
 855
 856         /* must terminate with zero or '\n' */
 857         if (s[len - 1] != '\0' && s[len - 1] != '\n')
 858                 return 0;
 859
 860         /* printable or a null byte (concatenated strings) */
 861         while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
 862                 /*
 863                  * If we see a null, there are three possibilities:
 864                  * 1) If len == 1, it is the end of the string, printable
 865                  * 2) Next character also a null, not printable.
 866                  * 3) Next character not a null, continue to check.
 867                  */
 868                 if (s[0] == '\0') {
 869                         if (len == 1)
 870                                 return 1;
 871                         if (s[1] == '\0')
 872                                 return 0;
 873                 }
 874                 s++;
 875                 len--;
 876         }
 877
 878         /* Not the null termination, or not done yet: not printable */
 879         if (*s != '\0' || (len != 0))
 880                 return 0;
 881
 882         return 1;
 883 }
 884
 885
 886 /*
 887  * Print the property in the best format, a heuristic guess.  Print as
 888  * a string, concatenated strings, a byte, word, double word, or (if all
 889  * else fails) it is printed as a stream of bytes.
 890  */
 891 static void print_data(const void *data, int len)
 892 {
 893         int j;
 894         const char *env_max_dump;
 895         ulong max_dump = ULONG_MAX;
 896
 897         /* no data, don't print */
 898         if (len == 0)
 899                 return;
 900
 901         env_max_dump = env_get("fdt_max_dump");
 902         if (env_max_dump)
 903                 max_dump = hextoul(env_max_dump, NULL);
 904
 905         /*
 906          * It is a string, but it may have multiple strings (embedded '\0's).
 907          */
 908         if (is_printable_string(data, len)) {
 909                 puts("\"");
 910                 j = 0;
 911                 while (j < len) {
 912                         if (j > 0)
 913                                 puts("\", \"");
 914                         puts(data);
 915                         j    += strlen(data) + 1;
 916                         data += strlen(data) + 1;
 917                 }
 918                 puts("\"");
 919                 return;
 920         }
 921
 922         if ((len %4) == 0) {
 923                 if (len > max_dump)
 924                         printf("* 0x%p [0x%08x]", data, len);
 925                 else {
 926                         const __be32 *p;
 927
 928                         printf("<");
 929                         for (j = 0, p = data; j < len/4; j++)
 930                                 printf("0x%08x%s", fdt32_to_cpu(p[j]),
 931                                         j < (len/4 - 1) ? " " : "");
 932                         printf(">");
 933                 }
 934         } else { /* anything else... hexdump */
 935                 if (len > max_dump)
 936                         printf("* 0x%p [0x%08x]", data, len);
 937                 else {
 938                         const u8 *s;
 939
 940                         printf("[");
 941                         for (j = 0, s = data; j < len; j++)
 942                                 printf("%02x%s", s[j], j < len - 1 ? " " : "");
 943                         printf("]");
 944                 }
 945         }
 946 }
 947
 948 /****************************************************************************/
 949
 950 /*
 951  * Recursively print (a portion of) the working_fdt.  The depth parameter
 952  * determines how deeply nested the fdt is printed.
 953  */
 954 static int fdt_print(const char *pathp, char *prop, int depth)
 955 {
 956         static char tabs[MAX_LEVEL+1] =
 957                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
 958                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
 959         const void *nodep;      /* property node pointer */
 960         int  nodeoffset;        /* node offset from libfdt */
 961         int  nextoffset;        /* next node offset from libfdt */
 962         uint32_t tag;           /* tag */
 963         int  len;               /* length of the property */
 964         int  level = 0;         /* keep track of nesting level */
 965         const struct fdt_property *fdt_prop;
 966
 967         nodeoffset = fdt_path_offset (working_fdt, pathp);
 968         if (nodeoffset < 0) {
 969                 /*
 970                  * Not found or something else bad happened.
 971                  */
 972                 printf ("libfdt fdt_path_offset() returned %s\n",
 973                         fdt_strerror(nodeoffset));
 974                 return 1;
 975         }
 976         /*
 977          * The user passed in a property as well as node path.
 978          * Print only the given property and then return.
 979          */
 980         if (prop) {
 981                 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
 982                 if (len == 0) {
 983                         /* no property value */
 984                         printf("%s %s\n", pathp, prop);
 985                         return 0;
 986                 } else if (nodep && len > 0) {
 987                         printf("%s = ", prop);
 988                         print_data (nodep, len);
 989                         printf("\n");
 990                         return 0;
 991                 } else {
 992                         printf ("libfdt fdt_getprop(): %s\n",
 993                                 fdt_strerror(len));
 994                         return 1;
 995                 }
 996         }
 997
 998         /*
 999          * The user passed in a node path and no property,
1000          * print the node and all subnodes.
1001          */
1002         while(level >= 0) {
1003                 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
1004                 switch(tag) {
1005                 case FDT_BEGIN_NODE:
1006                         pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
1007                         if (level <= depth) {
1008                                 if (pathp == NULL)
1009                                         pathp = "/* NULL pointer error */";
1010                                 if (*pathp == '\0')
1011                                         pathp = "/";    /* root is nameless */
1012                                 printf("%s%s {\n",
1013                                         &tabs[MAX_LEVEL - level], pathp);
1014                         }
1015                         level++;
1016                         if (level >= MAX_LEVEL) {
1017                                 printf("Nested too deep, aborting.\n");
1018                                 return 1;
1019                         }
1020                         break;
1021                 case FDT_END_NODE:
1022                         level--;
1023                         if (level <= depth)
1024                                 printf("%s};\n", &tabs[MAX_LEVEL - level]);
1025                         if (level == 0) {
1026                                 level = -1;             /* exit the loop */
1027                         }
1028                         break;
1029                 case FDT_PROP:
1030                         fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
1031                                         sizeof(*fdt_prop));
1032                         pathp    = fdt_string(working_fdt,
1033                                         fdt32_to_cpu(fdt_prop->nameoff));
1034                         len      = fdt32_to_cpu(fdt_prop->len);
1035                         nodep    = fdt_prop->data;
1036                         if (len < 0) {
1037                                 printf ("libfdt fdt_getprop(): %s\n",
1038                                         fdt_strerror(len));
1039                                 return 1;
1040                         } else if (len == 0) {
1041                                 /* the property has no value */
1042                                 if (level <= depth)
1043                                         printf("%s%s;\n",
1044                                                 &tabs[MAX_LEVEL - level],
1045                                                 pathp);
1046                         } else {
1047                                 if (level <= depth) {
1048                                         printf("%s%s = ",
1049                                                 &tabs[MAX_LEVEL - level],
1050                                                 pathp);
1051                                         print_data (nodep, len);
1052                                         printf(";\n");
1053                                 }
1054                         }
1055                         break;
1056                 case FDT_NOP:
1057                         printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
1058                         break;
1059                 case FDT_END:
1060                         return 1;
1061                 default:
1062                         if (level <= depth)
1063                                 printf("Unknown tag 0x%08X\n", tag);
1064                         return 1;
1065                 }
1066                 nodeoffset = nextoffset;
1067         }
1068         return 0;
1069 }
1070
1071 /********************************************************************/
1072 #ifdef CONFIG_SYS_LONGHELP
1073 static char fdt_help_text[] =
1074         "addr [-c] [-q] <addr> [<size>]  - Set the [control] fdt location to <addr>\n"
1075 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1076         "fdt apply <addr>                    - Apply overlay to the DT\n"
1077 #endif
1078 #ifdef CONFIG_OF_BOARD_SETUP
1079         "fdt boardsetup                      - Do board-specific set up\n"
1080 #endif
1081 #ifdef CONFIG_OF_SYSTEM_SETUP
1082         "fdt systemsetup                     - Do system-specific set up\n"
1083 #endif
1084         "fdt move   <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1085         "fdt resize [<extrasize>]            - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1086         "fdt print  <path> [<prop>]          - Recursive print starting at <path>\n"
1087         "fdt list   <path> [<prop>]          - Print one level starting at <path>\n"
1088         "fdt get value <var> <path> <prop>   - Get <property> and store in <var>\n"
1089         "fdt get name <var> <path> <index>   - Get name of node <index> and store in <var>\n"
1090         "fdt get addr <var> <path> <prop>    - Get start address of <property> and store in <var>\n"
1091         "fdt get size <var> <path> [<prop>]  - Get size of [<property>] or num nodes and store in <var>\n"
1092         "fdt set    <path> <prop> [<val>]    - Set <property> [to <val>]\n"
1093         "fdt mknode <path> <node>            - Create a new node after <path>\n"
1094         "fdt rm     <path> [<prop>]          - Delete the node or <property>\n"
1095         "fdt header [get <var> <member>]     - Display header info\n"
1096         "                                      get - get header member <member> and store it in <var>\n"
1097         "fdt bootcpu <id>                    - Set boot cpuid\n"
1098         "fdt memory <addr> <size>            - Add/Update memory node\n"
1099         "fdt rsvmem print                    - Show current mem reserves\n"
1100         "fdt rsvmem add <addr> <size>        - Add a mem reserve\n"
1101         "fdt rsvmem delete <index>           - Delete a mem reserves\n"
1102         "fdt chosen [<start> <size>]         - Add/update the /chosen branch in the tree\n"
1103         "                                        <start>/<size> - initrd start addr/size\n"
1104 #if defined(CONFIG_FIT_SIGNATURE)
1105         "fdt checksign [<addr>]              - check FIT signature\n"
1106         "                                        <start> - addr of key blob\n"
1107         "                                                  default gd->fdt_blob\n"
1108 #endif
1109         "NOTE: Dereference aliases by omitting the leading '/', "
1110                 "e.g. fdt print ethernet0.";
1111 #endif
1112
1113 U_BOOT_CMD(
1114         fdt,    255,    0,      do_fdt,
1115         "flattened device tree utility commands", fdt_help_text
1116 );