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