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 static void set_working_fdt_addr_quiet(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 void set_working_fdt_addr(ulong addr)
  49 {
  50         printf("Working FDT set to %lx\n", addr);
  51         set_working_fdt_addr_quiet(addr);
  52 }
  53
  54 /*
  55  * Get a value from the fdt and format it to be set in the environment
  56  */
  57 static int fdt_value_env_set(const void *nodep, int len,
  58                              const char *var, int index)
  59 {
  60         if (is_printable_string(nodep, len)) {
  61                 const char *nodec = (const char *)nodep;
  62                 int i;
  63
  64                 /*
  65                  * Iterate over all members in stringlist and find the one at
  66                  * offset $index. If no such index exists, indicate failure.
  67                  */
  68                 for (i = 0; i < len; ) {
  69                         if (index-- > 0) {
  70                                 i += strlen(nodec) + 1;
  71                                 nodec += strlen(nodec) + 1;
  72                                 continue;
  73                         }
  74
  75                         env_set(var, nodec);
  76                         return 0;
  77                 }
  78
  79                 return 1;
  80         } else if (len == 4) {
  81                 char buf[11];
  82
  83                 sprintf(buf, "0x%08X", fdt32_to_cpu(*(fdt32_t *)nodep));
  84                 env_set(var, buf);
  85         } else if (len % 4 == 0 && index >= 0) {
  86                 /* Needed to print integer arrays. */
  87                 const unsigned int *nodec = (const unsigned int *)nodep;
  88                 char buf[11];
  89
  90                 if (index * 4 >= len)
  91                         return 1;
  92
  93                 sprintf(buf, "0x%08X", fdt32_to_cpu(*(nodec + index)));
  94                 env_set(var, buf);
  95         } else if (len % 4 == 0 && len <= 20) {
  96                 /* Needed to print things like sha1 hashes. */
  97                 char buf[41];
  98                 int i;
  99
 100                 for (i = 0; i < len; i += sizeof(unsigned int))
 101                         sprintf(buf + (i * 2), "%08x",
 102                                 *(unsigned int *)(nodep + i));
 103                 env_set(var, buf);
 104         } else {
 105                 printf("error: unprintable value\n");
 106                 return 1;
 107         }
 108         return 0;
 109 }
 110
 111 static const char * const fdt_member_table[] = {
 112         "magic",
 113         "totalsize",
 114         "off_dt_struct",
 115         "off_dt_strings",
 116         "off_mem_rsvmap",
 117         "version",
 118         "last_comp_version",
 119         "boot_cpuid_phys",
 120         "size_dt_strings",
 121         "size_dt_struct",
 122 };
 123
 124 static int fdt_get_header_value(int argc, char *const argv[])
 125 {
 126         fdt32_t *fdtp = (fdt32_t *)working_fdt;
 127         ulong val;
 128         int i;
 129
 130         if (argv[2][0] != 'g')
 131                 return CMD_RET_FAILURE;
 132
 133         for (i = 0; i < ARRAY_SIZE(fdt_member_table); i++) {
 134                 if (strcmp(fdt_member_table[i], argv[4]))
 135                         continue;
 136
 137                 val = fdt32_to_cpu(fdtp[i]);
 138                 env_set_hex(argv[3], val);
 139                 return CMD_RET_SUCCESS;
 140         }
 141
 142         return CMD_RET_FAILURE;
 143 }
 144
 145 /*
 146  * Flattened Device Tree command, see the help for parameter definitions.
 147  */
 148 static int do_fdt(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 149 {
 150         if (argc < 2)
 151                 return CMD_RET_USAGE;
 152
 153         /* fdt addr: Set the address of the fdt */
 154         if (strncmp(argv[1], "ad", 2) == 0) {
 155                 unsigned long addr;
 156                 int control = 0;
 157                 int quiet = 0;
 158                 struct fdt_header *blob;
 159
 160                 /* Set the address [and length] of the fdt */
 161                 argc -= 2;
 162                 argv += 2;
 163                 while (argc > 0 && **argv == '-') {
 164                         char *arg = *argv;
 165
 166                         while (*++arg) {
 167                                 switch (*arg) {
 168                                 case 'c':
 169                                         control = 1;
 170                                         break;
 171                                 case 'q':
 172                                         quiet = 1;
 173                                         break;
 174                                 default:
 175                                         return CMD_RET_USAGE;
 176                                 }
 177                         }
 178                         argc--;
 179                         argv++;
 180                 }
 181                 if (argc == 0) {
 182                         if (control)
 183                                 blob = (struct fdt_header *)gd->fdt_blob;
 184                         else
 185                                 blob = working_fdt;
 186                         if (!blob || !fdt_valid(&blob))
 187                                 return 1;
 188                         printf("%s fdt: %08lx\n",
 189                                control ? "Control" : "Working",
 190                                control ? (ulong)map_to_sysmem(blob) :
 191                                env_get_hex("fdtaddr", 0));
 192                         return 0;
 193                 }
 194
 195                 addr = hextoul(argv[0], NULL);
 196                 blob = map_sysmem(addr, 0);
 197                 if ((quiet && fdt_check_header(blob)) ||
 198                     (!quiet && !fdt_valid(&blob)))
 199                         return 1;
 200                 if (control) {
 201                         gd->fdt_blob = blob;
 202                 } else {
 203                         if (quiet)
 204                                 set_working_fdt_addr_quiet(addr);
 205                         else
 206                                 set_working_fdt_addr(addr);
 207                 }
 208
 209                 if (argc >= 2) {
 210                         int  len;
 211                         int  err;
 212
 213                         /* Optional new length */
 214                         len = hextoul(argv[1], NULL);
 215                         if (len < fdt_totalsize(blob)) {
 216                                 if (!quiet)
 217                                         printf("New length %d < existing length %d, ignoring\n",
 218                                                len, fdt_totalsize(blob));
 219                         } else {
 220                                 /* Open in place with a new length */
 221                                 err = fdt_open_into(blob, blob, len);
 222                                 if (!quiet && err != 0) {
 223                                         printf("libfdt fdt_open_into(): %s\n",
 224                                                fdt_strerror(err));
 225                                 }
 226                         }
 227                 }
 228
 229                 return CMD_RET_SUCCESS;
 230
 231         /*
 232          * Move the working_fdt
 233          */
 234         } else if (strncmp(argv[1], "mo", 2) == 0) {
 235                 struct fdt_header *newaddr;
 236                 int  len;
 237                 int  err;
 238
 239                 if (argc < 4)
 240                         return CMD_RET_USAGE;
 241
 242                 /*
 243                  * Set the address and length of the fdt.
 244                  */
 245                 working_fdt = map_sysmem(hextoul(argv[2], NULL), 0);
 246                 if (!fdt_valid(&working_fdt))
 247                         return 1;
 248
 249                 newaddr = map_sysmem(hextoul(argv[3], NULL), 0);
 250
 251                 /*
 252                  * If the user specifies a length, use that.  Otherwise use the
 253                  * current length.
 254                  */
 255                 if (argc <= 4) {
 256                         len = fdt_totalsize(working_fdt);
 257                 } else {
 258                         len = hextoul(argv[4], NULL);
 259                         if (len < fdt_totalsize(working_fdt)) {
 260                                 printf ("New length 0x%X < existing length "
 261                                         "0x%X, aborting.\n",
 262                                         len, fdt_totalsize(working_fdt));
 263                                 return 1;
 264                         }
 265                 }
 266
 267                 /*
 268                  * Copy to the new location.
 269                  */
 270                 err = fdt_open_into(working_fdt, newaddr, len);
 271                 if (err != 0) {
 272                         printf ("libfdt fdt_open_into(): %s\n",
 273                                 fdt_strerror(err));
 274                         return 1;
 275                 }
 276                 set_working_fdt_addr(map_to_sysmem(newaddr));
 277
 278                 return CMD_RET_SUCCESS;
 279         }
 280
 281         if (!working_fdt) {
 282                 puts("No FDT memory address configured. Please configure\n"
 283                      "the FDT address via \"fdt addr <address>\" command.\n"
 284                      "Aborting!\n");
 285                 return CMD_RET_FAILURE;
 286         }
 287
 288 #ifdef CONFIG_OF_SYSTEM_SETUP
 289         /* Call the board-specific fixup routine */
 290         if (strncmp(argv[1], "sys", 3) == 0) {
 291                 int err = ft_system_setup(working_fdt, gd->bd);
 292
 293                 if (err) {
 294                         printf("Failed to add system information to FDT: %s\n",
 295                                fdt_strerror(err));
 296                         return CMD_RET_FAILURE;
 297                 }
 298
 299                 return CMD_RET_SUCCESS;
 300         }
 301 #endif
 302         /*
 303          * Make a new node
 304          */
 305         if (strncmp(argv[1], "mk", 2) == 0) {
 306                 char *pathp;            /* path */
 307                 char *nodep;            /* new node to add */
 308                 int  nodeoffset;        /* node offset from libfdt */
 309                 int  err;
 310
 311                 /*
 312                  * Parameters: Node path, new node to be appended to the path.
 313                  */
 314                 if (argc < 4)
 315                         return CMD_RET_USAGE;
 316
 317                 pathp = argv[2];
 318                 nodep = argv[3];
 319
 320                 nodeoffset = fdt_path_offset (working_fdt, pathp);
 321                 if (nodeoffset < 0) {
 322                         /*
 323                          * Not found or something else bad happened.
 324                          */
 325                         printf ("libfdt fdt_path_offset() returned %s\n",
 326                                 fdt_strerror(nodeoffset));
 327                         return 1;
 328                 }
 329                 err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
 330                 if (err < 0) {
 331                         printf ("libfdt fdt_add_subnode(): %s\n",
 332                                 fdt_strerror(err));
 333                         return 1;
 334                 }
 335
 336         /*
 337          * Set the value of a property in the working_fdt.
 338          */
 339         } else if (strncmp(argv[1], "se", 2) == 0) {
 340                 char *pathp;            /* path */
 341                 char *prop;             /* property */
 342                 int  nodeoffset;        /* node offset from libfdt */
 343                 static char data[SCRATCHPAD] __aligned(4);/* property storage */
 344                 const void *ptmp;
 345                 int  len;               /* new length of the property */
 346                 int  ret;               /* return value */
 347
 348                 /*
 349                  * Parameters: Node path, property, optional value.
 350                  */
 351                 if (argc < 4)
 352                         return CMD_RET_USAGE;
 353
 354                 pathp  = argv[2];
 355                 prop   = argv[3];
 356
 357                 nodeoffset = fdt_path_offset (working_fdt, pathp);
 358                 if (nodeoffset < 0) {
 359                         /*
 360                          * Not found or something else bad happened.
 361                          */
 362                         printf ("libfdt fdt_path_offset() returned %s\n",
 363                                 fdt_strerror(nodeoffset));
 364                         return 1;
 365                 }
 366
 367                 if (argc == 4) {
 368                         len = 0;
 369                 } else {
 370                         ptmp = fdt_getprop(working_fdt, nodeoffset, prop, &len);
 371                         if (len > SCRATCHPAD) {
 372                                 printf("prop (%d) doesn't fit in scratchpad!\n",
 373                                        len);
 374                                 return 1;
 375                         }
 376                         if (ptmp != NULL)
 377                                 memcpy(data, ptmp, len);
 378
 379                         ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
 380                         if (ret != 0)
 381                                 return ret;
 382                 }
 383
 384                 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
 385                 if (ret < 0) {
 386                         printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
 387                         return 1;
 388                 }
 389
 390         /********************************************************************
 391          * Get the value of a property in the working_fdt.
 392          ********************************************************************/
 393         } else if (argv[1][0] == 'g') {
 394                 char *subcmd;           /* sub-command */
 395                 char *pathp;            /* path */
 396                 char *prop;             /* property */
 397                 char *var;              /* variable to store result */
 398                 int  nodeoffset;        /* node offset from libfdt */
 399                 const void *nodep;      /* property node pointer */
 400                 int  len = 0;           /* new length of the property */
 401
 402                 /*
 403                  * Parameters: Node path, property, optional value.
 404                  */
 405                 if (argc < 5)
 406                         return CMD_RET_USAGE;
 407
 408                 subcmd = argv[2];
 409
 410                 if (argc < 6 && subcmd[0] != 's')
 411                         return CMD_RET_USAGE;
 412
 413                 var    = argv[3];
 414                 pathp  = argv[4];
 415                 prop   = argv[5];
 416
 417                 nodeoffset = fdt_path_offset(working_fdt, pathp);
 418                 if (nodeoffset < 0) {
 419                         /*
 420                          * Not found or something else bad happened.
 421                          */
 422                         printf("libfdt fdt_path_offset() returned %s\n",
 423                                 fdt_strerror(nodeoffset));
 424                         return 1;
 425                 }
 426
 427                 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
 428                         int req_index = -1;
 429                         int startDepth = fdt_node_depth(
 430                                 working_fdt, nodeoffset);
 431                         int curDepth = startDepth;
 432                         int cur_index = -1;
 433                         int nextNodeOffset = fdt_next_node(
 434                                 working_fdt, nodeoffset, &curDepth);
 435
 436                         if (subcmd[0] == 'n')
 437                                 req_index = hextoul(argv[5], NULL);
 438
 439                         while (curDepth > startDepth) {
 440                                 if (curDepth == startDepth + 1)
 441                                         cur_index++;
 442                                 if (subcmd[0] == 'n' &&
 443                                     cur_index == req_index) {
 444                                         const char *node_name;
 445
 446                                         node_name = fdt_get_name(working_fdt,
 447                                                                  nextNodeOffset,
 448                                                                  NULL);
 449                                         env_set(var, node_name);
 450                                         return 0;
 451                                 }
 452                                 nextNodeOffset = fdt_next_node(
 453                                         working_fdt, nextNodeOffset, &curDepth);
 454                                 if (nextNodeOffset < 0)
 455                                         break;
 456                         }
 457                         if (subcmd[0] == 's') {
 458                                 /* get the num nodes at this level */
 459                                 env_set_ulong(var, cur_index + 1);
 460                         } else {
 461                                 /* node index not found */
 462                                 printf("libfdt node not found\n");
 463                                 return 1;
 464                         }
 465                 } else {
 466                         nodep = fdt_getprop(
 467                                 working_fdt, nodeoffset, prop, &len);
 468                         if (nodep && len >= 0) {
 469                                 if (subcmd[0] == 'v') {
 470                                         int index = -1;
 471                                         int ret;
 472
 473                                         if (len == 0) {
 474                                                 /* no property value */
 475                                                 env_set(var, "");
 476                                                 return 0;
 477                                         }
 478
 479                                         if (argc == 7)
 480                                                 index = simple_strtoul(argv[6], NULL, 10);
 481
 482                                         ret = fdt_value_env_set(nodep, len,
 483                                                                 var, index);
 484                                         if (ret != 0)
 485                                                 return ret;
 486                                 } else if (subcmd[0] == 'a') {
 487                                         env_set_hex(var, (ulong)map_to_sysmem(nodep));
 488                                 } else if (subcmd[0] == 's') {
 489                                         env_set_hex(var, len);
 490                                 } else
 491                                         return CMD_RET_USAGE;
 492                                 return 0;
 493                         } else {
 494                                 printf("libfdt fdt_getprop(): %s\n",
 495                                         fdt_strerror(len));
 496                                 return 1;
 497                         }
 498                 }
 499
 500         /*
 501          * Print (recursive) / List (single level)
 502          */
 503         } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
 504                 int depth = MAX_LEVEL;  /* how deep to print */
 505                 char *pathp;            /* path */
 506                 char *prop;             /* property */
 507                 int  ret;               /* return value */
 508                 static char root[2] = "/";
 509
 510                 /*
 511                  * list is an alias for print, but limited to 1 level
 512                  */
 513                 if (argv[1][0] == 'l') {
 514                         depth = 1;
 515                 }
 516
 517                 /*
 518                  * Get the starting path.  The root node is an oddball,
 519                  * the offset is zero and has no name.
 520                  */
 521                 if (argc == 2)
 522                         pathp = root;
 523                 else
 524                         pathp = argv[2];
 525                 if (argc > 3)
 526                         prop = argv[3];
 527                 else
 528                         prop = NULL;
 529
 530                 ret = fdt_print(pathp, prop, depth);
 531                 if (ret != 0)
 532                         return ret;
 533
 534         /*
 535          * Remove a property/node
 536          */
 537         } else if (strncmp(argv[1], "rm", 2) == 0) {
 538                 int  nodeoffset;        /* node offset from libfdt */
 539                 int  err;
 540
 541                 /*
 542                  * Get the path.  The root node is an oddball, the offset
 543                  * is zero and has no name.
 544                  */
 545                 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
 546                 if (nodeoffset < 0) {
 547                         /*
 548                          * Not found or something else bad happened.
 549                          */
 550                         printf ("libfdt fdt_path_offset() returned %s\n",
 551                                 fdt_strerror(nodeoffset));
 552                         return 1;
 553                 }
 554                 /*
 555                  * Do the delete.  A fourth parameter means delete a property,
 556                  * otherwise delete the node.
 557                  */
 558                 if (argc > 3) {
 559                         err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
 560                         if (err < 0) {
 561                                 printf("libfdt fdt_delprop(): %s\n",
 562                                         fdt_strerror(err));
 563                                 return CMD_RET_FAILURE;
 564                         }
 565                 } else {
 566                         err = fdt_del_node(working_fdt, nodeoffset);
 567                         if (err < 0) {
 568                                 printf("libfdt fdt_del_node(): %s\n",
 569                                         fdt_strerror(err));
 570                                 return CMD_RET_FAILURE;
 571                         }
 572                 }
 573
 574         /*
 575          * Display header info
 576          */
 577         } else if (argv[1][0] == 'h') {
 578                 if (argc == 5)
 579                         return fdt_get_header_value(argc, argv);
 580
 581                 u32 version = fdt_version(working_fdt);
 582                 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
 583                 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
 584                        fdt_totalsize(working_fdt));
 585                 printf("off_dt_struct:\t\t0x%x\n",
 586                        fdt_off_dt_struct(working_fdt));
 587                 printf("off_dt_strings:\t\t0x%x\n",
 588                        fdt_off_dt_strings(working_fdt));
 589                 printf("off_mem_rsvmap:\t\t0x%x\n",
 590                        fdt_off_mem_rsvmap(working_fdt));
 591                 printf("version:\t\t%d\n", version);
 592                 printf("last_comp_version:\t%d\n",
 593                        fdt_last_comp_version(working_fdt));
 594                 if (version >= 2)
 595                         printf("boot_cpuid_phys:\t0x%x\n",
 596                                 fdt_boot_cpuid_phys(working_fdt));
 597                 if (version >= 3)
 598                         printf("size_dt_strings:\t0x%x\n",
 599                                 fdt_size_dt_strings(working_fdt));
 600                 if (version >= 17)
 601                         printf("size_dt_struct:\t\t0x%x\n",
 602                                 fdt_size_dt_struct(working_fdt));
 603                 printf("number mem_rsv:\t\t0x%x\n",
 604                        fdt_num_mem_rsv(working_fdt));
 605                 printf("\n");
 606
 607         /*
 608          * Set boot cpu id
 609          */
 610         } else if (strncmp(argv[1], "boo", 3) == 0) {
 611                 unsigned long tmp;
 612
 613                 if (argc != 3)
 614                         return CMD_RET_USAGE;
 615
 616                 tmp = hextoul(argv[2], NULL);
 617                 fdt_set_boot_cpuid_phys(working_fdt, tmp);
 618
 619         /*
 620          * memory command
 621          */
 622         } else if (strncmp(argv[1], "me", 2) == 0) {
 623                 uint64_t addr, size;
 624                 int err;
 625
 626                 if (argc != 4)
 627                         return CMD_RET_USAGE;
 628
 629                 addr = simple_strtoull(argv[2], NULL, 16);
 630                 size = simple_strtoull(argv[3], NULL, 16);
 631                 err = fdt_fixup_memory(working_fdt, addr, size);
 632                 if (err < 0)
 633                         return err;
 634
 635         /*
 636          * mem reserve commands
 637          */
 638         } else if (strncmp(argv[1], "rs", 2) == 0) {
 639                 if (argv[2][0] == 'p') {
 640                         uint64_t addr, size;
 641                         int total = fdt_num_mem_rsv(working_fdt);
 642                         int j, err;
 643                         printf("index\t\t   start\t\t    size\n");
 644                         printf("-------------------------------"
 645                                 "-----------------\n");
 646                         for (j = 0; j < total; j++) {
 647                                 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
 648                                 if (err < 0) {
 649                                         printf("libfdt fdt_get_mem_rsv():  %s\n",
 650                                                         fdt_strerror(err));
 651                                         return err;
 652                                 }
 653                                 printf("    %x\t%08x%08x\t%08x%08x\n", j,
 654                                         (u32)(addr >> 32),
 655                                         (u32)(addr & 0xffffffff),
 656                                         (u32)(size >> 32),
 657                                         (u32)(size & 0xffffffff));
 658                         }
 659                 } else if (argv[2][0] == 'a') {
 660                         uint64_t addr, size;
 661                         int err;
 662                         addr = simple_strtoull(argv[3], NULL, 16);
 663                         size = simple_strtoull(argv[4], NULL, 16);
 664                         err = fdt_add_mem_rsv(working_fdt, addr, size);
 665
 666                         if (err < 0) {
 667                                 printf("libfdt fdt_add_mem_rsv(): %s\n",
 668                                         fdt_strerror(err));
 669                                 return CMD_RET_FAILURE;
 670                         }
 671                 } else if (argv[2][0] == 'd') {
 672                         unsigned long idx = hextoul(argv[3], NULL);
 673                         int err = fdt_del_mem_rsv(working_fdt, idx);
 674
 675                         if (err < 0) {
 676                                 printf("libfdt fdt_del_mem_rsv(): %s\n",
 677                                         fdt_strerror(err));
 678                                 return CMD_RET_FAILURE;
 679                         }
 680                 } else {
 681                         /* Unrecognized command */
 682                         return CMD_RET_USAGE;
 683                 }
 684         }
 685 #ifdef CONFIG_OF_BOARD_SETUP
 686         /* Call the board-specific fixup routine */
 687         else if (strncmp(argv[1], "boa", 3) == 0) {
 688                 int err = ft_board_setup(working_fdt, gd->bd);
 689
 690                 if (err) {
 691                         printf("Failed to update board information in FDT: %s\n",
 692                                fdt_strerror(err));
 693                         return CMD_RET_FAILURE;
 694                 }
 695 #ifdef CONFIG_ARCH_KEYSTONE
 696                 ft_board_setup_ex(working_fdt, gd->bd);
 697 #endif
 698         }
 699 #endif
 700         /* Create a chosen node */
 701         else if (strncmp(argv[1], "cho", 3) == 0) {
 702                 unsigned long initrd_start = 0, initrd_end = 0;
 703
 704                 if ((argc != 2) && (argc != 4))
 705                         return CMD_RET_USAGE;
 706
 707                 if (argc == 4) {
 708                         initrd_start = hextoul(argv[2], NULL);
 709                         initrd_end = initrd_start + hextoul(argv[3], NULL) - 1;
 710                 }
 711
 712                 fdt_chosen(working_fdt);
 713                 fdt_initrd(working_fdt, initrd_start, initrd_end);
 714
 715 #if defined(CONFIG_FIT_SIGNATURE)
 716         } else if (strncmp(argv[1], "che", 3) == 0) {
 717                 int cfg_noffset;
 718                 int ret;
 719                 unsigned long addr;
 720                 struct fdt_header *blob;
 721
 722                 if (!working_fdt)
 723                         return CMD_RET_FAILURE;
 724
 725                 if (argc > 2) {
 726                         addr = hextoul(argv[2], NULL);
 727                         blob = map_sysmem(addr, 0);
 728                 } else {
 729                         blob = (struct fdt_header *)gd->fdt_blob;
 730                 }
 731                 if (!fdt_valid(&blob))
 732                         return 1;
 733
 734                 gd->fdt_blob = blob;
 735                 cfg_noffset = fit_conf_get_node(working_fdt, NULL);
 736                 if (cfg_noffset < 0) {
 737                         printf("Could not find configuration node: %s\n",
 738                                fdt_strerror(cfg_noffset));
 739                         return CMD_RET_FAILURE;
 740                 }
 741
 742                 ret = fit_config_verify(working_fdt, cfg_noffset);
 743                 if (ret == 0)
 744                         return CMD_RET_SUCCESS;
 745                 else
 746                         return CMD_RET_FAILURE;
 747 #endif
 748
 749         }
 750 #ifdef CONFIG_OF_LIBFDT_OVERLAY
 751         /* apply an overlay */
 752         else if (strncmp(argv[1], "ap", 2) == 0) {
 753                 unsigned long addr;
 754                 struct fdt_header *blob;
 755                 int ret;
 756
 757                 if (argc != 3)
 758                         return CMD_RET_USAGE;
 759
 760                 if (!working_fdt)
 761                         return CMD_RET_FAILURE;
 762
 763                 addr = hextoul(argv[2], NULL);
 764                 blob = map_sysmem(addr, 0);
 765                 if (!fdt_valid(&blob))
 766                         return CMD_RET_FAILURE;
 767
 768                 /* apply method prints messages on error */
 769                 ret = fdt_overlay_apply_verbose(working_fdt, blob);
 770                 if (ret)
 771                         return CMD_RET_FAILURE;
 772         }
 773 #endif
 774         /* resize the fdt */
 775         else if (strncmp(argv[1], "re", 2) == 0) {
 776                 uint extrasize;
 777                 if (argc > 2)
 778                         extrasize = hextoul(argv[2], NULL);
 779                 else
 780                         extrasize = 0;
 781                 fdt_shrink_to_minimum(working_fdt, extrasize);
 782         }
 783         else {
 784                 /* Unrecognized command */
 785                 return CMD_RET_USAGE;
 786         }
 787
 788         return 0;
 789 }
 790
 791 /****************************************************************************/
 792
 793 /*
 794  * Parse the user's input, partially heuristic.  Valid formats:
 795  * <0x00112233 4 05>    - an array of cells.  Numbers follow standard
 796  *                      C conventions.
 797  * [00 11 22 .. nn] - byte stream
 798  * "string"     - If the the value doesn't start with "<" or "[", it is
 799  *                      treated as a string.  Note that the quotes are
 800  *                      stripped by the parser before we get the string.
 801  * newval: An array of strings containing the new property as specified
 802  *      on the command line
 803  * count: The number of strings in the array
 804  * data: A bytestream to be placed in the property
 805  * len: The length of the resulting bytestream
 806  */
 807 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
 808 {
 809         char *cp;               /* temporary char pointer */
 810         char *newp;             /* temporary newval char pointer */
 811         unsigned long tmp;      /* holds converted values */
 812         int stridx = 0;
 813
 814         *len = 0;
 815         newp = newval[0];
 816
 817         /* An array of cells */
 818         if (*newp == '<') {
 819                 newp++;
 820                 while ((*newp != '>') && (stridx < count)) {
 821                         /*
 822                          * Keep searching until we find that last ">"
 823                          * That way users don't have to escape the spaces
 824                          */
 825                         if (*newp == '\0') {
 826                                 newp = newval[++stridx];
 827                                 continue;
 828                         }
 829
 830                         cp = newp;
 831                         tmp = simple_strtoul(cp, &newp, 0);
 832                         if (*cp != '?')
 833                                 *(fdt32_t *)data = cpu_to_fdt32(tmp);
 834                         else
 835                                 newp++;
 836
 837                         data  += 4;
 838                         *len += 4;
 839
 840                         /* If the ptr didn't advance, something went wrong */
 841                         if ((newp - cp) <= 0) {
 842                                 printf("Sorry, I could not convert \"%s\"\n",
 843                                         cp);
 844                                 return 1;
 845                         }
 846
 847                         while (*newp == ' ')
 848                                 newp++;
 849                 }
 850
 851                 if (*newp != '>') {
 852                         printf("Unexpected character '%c'\n", *newp);
 853                         return 1;
 854                 }
 855         } else if (*newp == '[') {
 856                 /*
 857                  * Byte stream.  Convert the values.
 858                  */
 859                 newp++;
 860                 while ((stridx < count) && (*newp != ']')) {
 861                         while (*newp == ' ')
 862                                 newp++;
 863                         if (*newp == '\0') {
 864                                 newp = newval[++stridx];
 865                                 continue;
 866                         }
 867                         if (!isxdigit(*newp))
 868                                 break;
 869                         tmp = hextoul(newp, &newp);
 870                         *data++ = tmp & 0xFF;
 871                         *len    = *len + 1;
 872                 }
 873                 if (*newp != ']') {
 874                         printf("Unexpected character '%c'\n", *newp);
 875                         return 1;
 876                 }
 877         } else {
 878                 /*
 879                  * Assume it is one or more strings.  Copy it into our
 880                  * data area for convenience (including the
 881                  * terminating '\0's).
 882                  */
 883                 while (stridx < count) {
 884                         size_t length = strlen(newp) + 1;
 885                         strcpy(data, newp);
 886                         data += length;
 887                         *len += length;
 888                         newp = newval[++stridx];
 889                 }
 890         }
 891         return 0;
 892 }
 893
 894 /****************************************************************************/
 895
 896 /*
 897  * Heuristic to guess if this is a string or concatenated strings.
 898  */
 899
 900 static int is_printable_string(const void *data, int len)
 901 {
 902         const char *s = data;
 903         const char *ss, *se;
 904
 905         /* zero length is not */
 906         if (len == 0)
 907                 return 0;
 908
 909         /* must terminate with zero */
 910         if (s[len - 1] != '\0')
 911                 return 0;
 912
 913         se = s + len;
 914
 915         while (s < se) {
 916                 ss = s;
 917                 while (s < se && *s && isprint((unsigned char)*s))
 918                         s++;
 919
 920                 /* not zero, or not done yet */
 921                 if (*s != '\0' || s == ss)
 922                         return 0;
 923
 924                 s++;
 925         }
 926
 927         return 1;
 928 }
 929
 930 /*
 931  * Print the property in the best format, a heuristic guess.  Print as
 932  * a string, concatenated strings, a byte, word, double word, or (if all
 933  * else fails) it is printed as a stream of bytes.
 934  */
 935 static void print_data(const void *data, int len)
 936 {
 937         int j;
 938         const char *env_max_dump;
 939         ulong max_dump = ULONG_MAX;
 940
 941         /* no data, don't print */
 942         if (len == 0)
 943                 return;
 944
 945         env_max_dump = env_get("fdt_max_dump");
 946         if (env_max_dump)
 947                 max_dump = hextoul(env_max_dump, NULL);
 948
 949         /*
 950          * It is a string, but it may have multiple strings (embedded '\0's).
 951          */
 952         if (is_printable_string(data, len)) {
 953                 puts("\"");
 954                 j = 0;
 955                 while (j < len) {
 956                         if (j > 0)
 957                                 puts("\", \"");
 958                         puts(data);
 959                         j    += strlen(data) + 1;
 960                         data += strlen(data) + 1;
 961                 }
 962                 puts("\"");
 963                 return;
 964         }
 965
 966         if ((len %4) == 0) {
 967                 if (len > max_dump)
 968                         printf("* 0x%p [0x%08x]", data, len);
 969                 else {
 970                         const __be32 *p;
 971
 972                         printf("<");
 973                         for (j = 0, p = data; j < len/4; j++)
 974                                 printf("0x%08x%s", fdt32_to_cpu(p[j]),
 975                                         j < (len/4 - 1) ? " " : "");
 976                         printf(">");
 977                 }
 978         } else { /* anything else... hexdump */
 979                 if (len > max_dump)
 980                         printf("* 0x%p [0x%08x]", data, len);
 981                 else {
 982                         const u8 *s;
 983
 984                         printf("[");
 985                         for (j = 0, s = data; j < len; j++)
 986                                 printf("%02x%s", s[j], j < len - 1 ? " " : "");
 987                         printf("]");
 988                 }
 989         }
 990 }
 991
 992 /****************************************************************************/
 993
 994 /*
 995  * Recursively print (a portion of) the working_fdt.  The depth parameter
 996  * determines how deeply nested the fdt is printed.
 997  */
 998 static int fdt_print(const char *pathp, char *prop, int depth)
 999 {
1000         static char tabs[MAX_LEVEL+1] =
1001                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
1002                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
1003         const void *nodep;      /* property node pointer */
1004         int  nodeoffset;        /* node offset from libfdt */
1005         int  nextoffset;        /* next node offset from libfdt */
1006         uint32_t tag;           /* tag */
1007         int  len;               /* length of the property */
1008         int  level = 0;         /* keep track of nesting level */
1009         const struct fdt_property *fdt_prop;
1010
1011         nodeoffset = fdt_path_offset (working_fdt, pathp);
1012         if (nodeoffset < 0) {
1013                 /*
1014                  * Not found or something else bad happened.
1015                  */
1016                 printf ("libfdt fdt_path_offset() returned %s\n",
1017                         fdt_strerror(nodeoffset));
1018                 return 1;
1019         }
1020         /*
1021          * The user passed in a property as well as node path.
1022          * Print only the given property and then return.
1023          */
1024         if (prop) {
1025                 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
1026                 if (len == 0) {
1027                         /* no property value */
1028                         printf("%s %s\n", pathp, prop);
1029                         return 0;
1030                 } else if (nodep && len > 0) {
1031                         printf("%s = ", prop);
1032                         print_data (nodep, len);
1033                         printf("\n");
1034                         return 0;
1035                 } else {
1036                         printf ("libfdt fdt_getprop(): %s\n",
1037                                 fdt_strerror(len));
1038                         return 1;
1039                 }
1040         }
1041
1042         /*
1043          * The user passed in a node path and no property,
1044          * print the node and all subnodes.
1045          */
1046         while(level >= 0) {
1047                 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
1048                 switch(tag) {
1049                 case FDT_BEGIN_NODE:
1050                         pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
1051                         if (level <= depth) {
1052                                 if (pathp == NULL)
1053                                         pathp = "/* NULL pointer error */";
1054                                 if (*pathp == '\0')
1055                                         pathp = "/";    /* root is nameless */
1056                                 printf("%s%s {\n",
1057                                         &tabs[MAX_LEVEL - level], pathp);
1058                         }
1059                         level++;
1060                         if (level >= MAX_LEVEL) {
1061                                 printf("Nested too deep, aborting.\n");
1062                                 return 1;
1063                         }
1064                         break;
1065                 case FDT_END_NODE:
1066                         level--;
1067                         if (level <= depth)
1068                                 printf("%s};\n", &tabs[MAX_LEVEL - level]);
1069                         if (level == 0) {
1070                                 level = -1;             /* exit the loop */
1071                         }
1072                         break;
1073                 case FDT_PROP:
1074                         fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
1075                                         sizeof(*fdt_prop));
1076                         pathp    = fdt_string(working_fdt,
1077                                         fdt32_to_cpu(fdt_prop->nameoff));
1078                         len      = fdt32_to_cpu(fdt_prop->len);
1079                         nodep    = fdt_prop->data;
1080                         if (len < 0) {
1081                                 printf ("libfdt fdt_getprop(): %s\n",
1082                                         fdt_strerror(len));
1083                                 return 1;
1084                         } else if (len == 0) {
1085                                 /* the property has no value */
1086                                 if (level <= depth)
1087                                         printf("%s%s;\n",
1088                                                 &tabs[MAX_LEVEL - level],
1089                                                 pathp);
1090                         } else {
1091                                 if (level <= depth) {
1092                                         printf("%s%s = ",
1093                                                 &tabs[MAX_LEVEL - level],
1094                                                 pathp);
1095                                         print_data (nodep, len);
1096                                         printf(";\n");
1097                                 }
1098                         }
1099                         break;
1100                 case FDT_NOP:
1101                         printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
1102                         break;
1103                 case FDT_END:
1104                         return 1;
1105                 default:
1106                         if (level <= depth)
1107                                 printf("Unknown tag 0x%08X\n", tag);
1108                         return 1;
1109                 }
1110                 nodeoffset = nextoffset;
1111         }
1112         return 0;
1113 }
1114
1115 /********************************************************************/
1116 #ifdef CONFIG_SYS_LONGHELP
1117 static char fdt_help_text[] =
1118         "addr [-c] [-q] <addr> [<size>]  - Set the [control] fdt location to <addr>\n"
1119 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1120         "fdt apply <addr>                    - Apply overlay to the DT\n"
1121 #endif
1122 #ifdef CONFIG_OF_BOARD_SETUP
1123         "fdt boardsetup                      - Do board-specific set up\n"
1124 #endif
1125 #ifdef CONFIG_OF_SYSTEM_SETUP
1126         "fdt systemsetup                     - Do system-specific set up\n"
1127 #endif
1128         "fdt move   <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1129         "fdt resize [<extrasize>]            - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1130         "fdt print  <path> [<prop>]          - Recursive print starting at <path>\n"
1131         "fdt list   <path> [<prop>]          - Print one level starting at <path>\n"
1132         "fdt get value <var> <path> <prop> [<index>] - Get <property> and store in <var>\n"
1133         "                                      In case of stringlist property, use optional <index>\n"
1134         "                                      to select string within the stringlist. Default is 0.\n"
1135         "fdt get name <var> <path> <index>   - Get name of node <index> and store in <var>\n"
1136         "fdt get addr <var> <path> <prop>    - Get start address of <property> and store in <var>\n"
1137         "fdt get size <var> <path> [<prop>]  - Get size of [<property>] or num nodes and store in <var>\n"
1138         "fdt set    <path> <prop> [<val>]    - Set <property> [to <val>]\n"
1139         "fdt mknode <path> <node>            - Create a new node after <path>\n"
1140         "fdt rm     <path> [<prop>]          - Delete the node or <property>\n"
1141         "fdt header [get <var> <member>]     - Display header info\n"
1142         "                                      get - get header member <member> and store it in <var>\n"
1143         "fdt bootcpu <id>                    - Set boot cpuid\n"
1144         "fdt memory <addr> <size>            - Add/Update memory node\n"
1145         "fdt rsvmem print                    - Show current mem reserves\n"
1146         "fdt rsvmem add <addr> <size>        - Add a mem reserve\n"
1147         "fdt rsvmem delete <index>           - Delete a mem reserves\n"
1148         "fdt chosen [<start> <size>]         - Add/update the /chosen branch in the tree\n"
1149         "                                        <start>/<size> - initrd start addr/size\n"
1150 #if defined(CONFIG_FIT_SIGNATURE)
1151         "fdt checksign [<addr>]              - check FIT signature\n"
1152         "                                      <addr> - address of key blob\n"
1153         "                                               default gd->fdt_blob\n"
1154 #endif
1155         "NOTE: Dereference aliases by omitting the leading '/', "
1156                 "e.g. fdt print ethernet0.";
1157 #endif
1158
1159 U_BOOT_CMD(
1160         fdt,    255,    0,      do_fdt,
1161         "flattened device tree utility commands", fdt_help_text
1162 );