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         printf("Working FDT set to %lx\n", addr);
  44         buf = map_sysmem(addr, 0);
  45         working_fdt = buf;
  46         env_set_hex("fdtaddr", addr);
  47 }
  48
  49 /*
  50  * Get a value from the fdt and format it to be set in the environment
  51  */
  52 static int fdt_value_env_set(const void *nodep, int len,
  53                              const char *var, int index)
  54 {
  55         if (is_printable_string(nodep, len)) {
  56                 const char *nodec = (const char *)nodep;
  57                 int i;
  58
  59                 /*
  60                  * Iterate over all members in stringlist and find the one at
  61                  * offset $index. If no such index exists, indicate failure.
  62                  */
  63                 for (i = 0; i < len; i += strlen(nodec) + 1) {
  64                         if (index-- > 0)
  65                                 continue;
  66
  67                         env_set(var, nodec + i);
  68                         return 0;
  69                 }
  70
  71                 return 1;
  72         } else if (len == 4) {
  73                 char buf[11];
  74
  75                 sprintf(buf, "0x%08X", fdt32_to_cpu(*(fdt32_t *)nodep));
  76                 env_set(var, buf);
  77         } else if (len%4 == 0 && len <= 20) {
  78                 /* Needed to print things like sha1 hashes. */
  79                 char buf[41];
  80                 int i;
  81
  82                 for (i = 0; i < len; i += sizeof(unsigned int))
  83                         sprintf(buf + (i * 2), "%08x",
  84                                 *(unsigned int *)(nodep + i));
  85                 env_set(var, buf);
  86         } else {
  87                 printf("error: unprintable value\n");
  88                 return 1;
  89         }
  90         return 0;
  91 }
  92
  93 static const char * const fdt_member_table[] = {
  94         "magic",
  95         "totalsize",
  96         "off_dt_struct",
  97         "off_dt_strings",
  98         "off_mem_rsvmap",
  99         "version",
 100         "last_comp_version",
 101         "boot_cpuid_phys",
 102         "size_dt_strings",
 103         "size_dt_struct",
 104 };
 105
 106 static int fdt_get_header_value(int argc, char *const argv[])
 107 {
 108         fdt32_t *fdtp = (fdt32_t *)working_fdt;
 109         ulong val;
 110         int i;
 111
 112         if (argv[2][0] != 'g')
 113                 return CMD_RET_FAILURE;
 114
 115         for (i = 0; i < ARRAY_SIZE(fdt_member_table); i++) {
 116                 if (strcmp(fdt_member_table[i], argv[4]))
 117                         continue;
 118
 119                 val = fdt32_to_cpu(fdtp[i]);
 120                 env_set_hex(argv[3], val);
 121                 return CMD_RET_SUCCESS;
 122         }
 123
 124         return CMD_RET_FAILURE;
 125 }
 126
 127 /*
 128  * Flattened Device Tree command, see the help for parameter definitions.
 129  */
 130 static int do_fdt(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 131 {
 132         if (argc < 2)
 133                 return CMD_RET_USAGE;
 134
 135         /* fdt addr: Set the address of the fdt */
 136         if (strncmp(argv[1], "ad", 2) == 0) {
 137                 unsigned long addr;
 138                 int control = 0;
 139                 int quiet = 0;
 140                 struct fdt_header *blob;
 141
 142                 /* Set the address [and length] of the fdt */
 143                 argc -= 2;
 144                 argv += 2;
 145                 while (argc > 0 && **argv == '-') {
 146                         char *arg = *argv;
 147
 148                         while (*++arg) {
 149                                 switch (*arg) {
 150                                 case 'c':
 151                                         control = 1;
 152                                         break;
 153                                 case 'q':
 154                                         quiet = 1;
 155                                         break;
 156                                 default:
 157                                         return CMD_RET_USAGE;
 158                                 }
 159                         }
 160                         argc--;
 161                         argv++;
 162                 }
 163                 if (argc == 0) {
 164                         if (control)
 165                                 blob = (struct fdt_header *)gd->fdt_blob;
 166                         else
 167                                 blob = working_fdt;
 168                         if (!blob || !fdt_valid(&blob))
 169                                 return 1;
 170                         printf("%s fdt: %08lx\n",
 171                                control ? "Control" : "Working",
 172                                control ? (ulong)map_to_sysmem(blob) :
 173                                env_get_hex("fdtaddr", 0));
 174                         return 0;
 175                 }
 176
 177                 addr = hextoul(argv[0], NULL);
 178                 blob = map_sysmem(addr, 0);
 179                 if ((quiet && fdt_check_header(blob)) ||
 180                     (!quiet && !fdt_valid(&blob)))
 181                         return 1;
 182                 if (control)
 183                         gd->fdt_blob = blob;
 184                 else
 185                         set_working_fdt_addr(addr);
 186
 187                 if (argc >= 2) {
 188                         int  len;
 189                         int  err;
 190
 191                         /* Optional new length */
 192                         len = hextoul(argv[1], NULL);
 193                         if (len < fdt_totalsize(blob)) {
 194                                 if (!quiet)
 195                                         printf("New length %d < existing length %d, ignoring\n",
 196                                                len, fdt_totalsize(blob));
 197                         } else {
 198                                 /* Open in place with a new length */
 199                                 err = fdt_open_into(blob, blob, len);
 200                                 if (!quiet && err != 0) {
 201                                         printf("libfdt fdt_open_into(): %s\n",
 202                                                fdt_strerror(err));
 203                                 }
 204                         }
 205                 }
 206
 207                 return CMD_RET_SUCCESS;
 208         }
 209
 210         if (!working_fdt) {
 211                 puts("No FDT memory address configured. Please configure\n"
 212                      "the FDT address via \"fdt addr <address>\" command.\n"
 213                      "Aborting!\n");
 214                 return CMD_RET_FAILURE;
 215         }
 216
 217         /*
 218          * Move the working_fdt
 219          */
 220         if (strncmp(argv[1], "mo", 2) == 0) {
 221                 struct fdt_header *newaddr;
 222                 int  len;
 223                 int  err;
 224
 225                 if (argc < 4)
 226                         return CMD_RET_USAGE;
 227
 228                 /*
 229                  * Set the address and length of the fdt.
 230                  */
 231                 working_fdt = (struct fdt_header *)hextoul(argv[2], NULL);
 232                 if (!fdt_valid(&working_fdt))
 233                         return 1;
 234
 235                 newaddr = (struct fdt_header *)hextoul(argv[3], NULL);
 236
 237                 /*
 238                  * If the user specifies a length, use that.  Otherwise use the
 239                  * current length.
 240                  */
 241                 if (argc <= 4) {
 242                         len = fdt_totalsize(working_fdt);
 243                 } else {
 244                         len = hextoul(argv[4], NULL);
 245                         if (len < fdt_totalsize(working_fdt)) {
 246                                 printf ("New length 0x%X < existing length "
 247                                         "0x%X, aborting.\n",
 248                                         len, fdt_totalsize(working_fdt));
 249                                 return 1;
 250                         }
 251                 }
 252
 253                 /*
 254                  * Copy to the new location.
 255                  */
 256                 err = fdt_open_into(working_fdt, newaddr, len);
 257                 if (err != 0) {
 258                         printf ("libfdt fdt_open_into(): %s\n",
 259                                 fdt_strerror(err));
 260                         return 1;
 261                 }
 262                 set_working_fdt_addr((ulong)newaddr);
 263 #ifdef CONFIG_OF_SYSTEM_SETUP
 264         /* Call the board-specific fixup routine */
 265         } else if (strncmp(argv[1], "sys", 3) == 0) {
 266                 int err = ft_system_setup(working_fdt, gd->bd);
 267
 268                 if (err) {
 269                         printf("Failed to add system information to FDT: %s\n",
 270                                fdt_strerror(err));
 271                         return CMD_RET_FAILURE;
 272                 }
 273 #endif
 274         /*
 275          * Make a new node
 276          */
 277         } else if (strncmp(argv[1], "mk", 2) == 0) {
 278                 char *pathp;            /* path */
 279                 char *nodep;            /* new node to add */
 280                 int  nodeoffset;        /* node offset from libfdt */
 281                 int  err;
 282
 283                 /*
 284                  * Parameters: Node path, new node to be appended to the path.
 285                  */
 286                 if (argc < 4)
 287                         return CMD_RET_USAGE;
 288
 289                 pathp = argv[2];
 290                 nodep = argv[3];
 291
 292                 nodeoffset = fdt_path_offset (working_fdt, pathp);
 293                 if (nodeoffset < 0) {
 294                         /*
 295                          * Not found or something else bad happened.
 296                          */
 297                         printf ("libfdt fdt_path_offset() returned %s\n",
 298                                 fdt_strerror(nodeoffset));
 299                         return 1;
 300                 }
 301                 err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
 302                 if (err < 0) {
 303                         printf ("libfdt fdt_add_subnode(): %s\n",
 304                                 fdt_strerror(err));
 305                         return 1;
 306                 }
 307
 308         /*
 309          * Set the value of a property in the working_fdt.
 310          */
 311         } else if (strncmp(argv[1], "se", 2) == 0) {
 312                 char *pathp;            /* path */
 313                 char *prop;             /* property */
 314                 int  nodeoffset;        /* node offset from libfdt */
 315                 static char data[SCRATCHPAD] __aligned(4);/* property storage */
 316                 const void *ptmp;
 317                 int  len;               /* new length of the property */
 318                 int  ret;               /* return value */
 319
 320                 /*
 321                  * Parameters: Node path, property, optional value.
 322                  */
 323                 if (argc < 4)
 324                         return CMD_RET_USAGE;
 325
 326                 pathp  = argv[2];
 327                 prop   = argv[3];
 328
 329                 nodeoffset = fdt_path_offset (working_fdt, pathp);
 330                 if (nodeoffset < 0) {
 331                         /*
 332                          * Not found or something else bad happened.
 333                          */
 334                         printf ("libfdt fdt_path_offset() returned %s\n",
 335                                 fdt_strerror(nodeoffset));
 336                         return 1;
 337                 }
 338
 339                 if (argc == 4) {
 340                         len = 0;
 341                 } else {
 342                         ptmp = fdt_getprop(working_fdt, nodeoffset, prop, &len);
 343                         if (len > SCRATCHPAD) {
 344                                 printf("prop (%d) doesn't fit in scratchpad!\n",
 345                                        len);
 346                                 return 1;
 347                         }
 348                         if (ptmp != NULL)
 349                                 memcpy(data, ptmp, len);
 350
 351                         ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
 352                         if (ret != 0)
 353                                 return ret;
 354                 }
 355
 356                 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
 357                 if (ret < 0) {
 358                         printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
 359                         return 1;
 360                 }
 361
 362         /********************************************************************
 363          * Get the value of a property in the working_fdt.
 364          ********************************************************************/
 365         } else if (argv[1][0] == 'g') {
 366                 char *subcmd;           /* sub-command */
 367                 char *pathp;            /* path */
 368                 char *prop;             /* property */
 369                 char *var;              /* variable to store result */
 370                 int  nodeoffset;        /* node offset from libfdt */
 371                 const void *nodep;      /* property node pointer */
 372                 int  len = 0;           /* new length of the property */
 373
 374                 /*
 375                  * Parameters: Node path, property, optional value.
 376                  */
 377                 if (argc < 5)
 378                         return CMD_RET_USAGE;
 379
 380                 subcmd = argv[2];
 381
 382                 if (argc < 6 && subcmd[0] != 's')
 383                         return CMD_RET_USAGE;
 384
 385                 var    = argv[3];
 386                 pathp  = argv[4];
 387                 prop   = argv[5];
 388
 389                 nodeoffset = fdt_path_offset(working_fdt, pathp);
 390                 if (nodeoffset < 0) {
 391                         /*
 392                          * Not found or something else bad happened.
 393                          */
 394                         printf("libfdt fdt_path_offset() returned %s\n",
 395                                 fdt_strerror(nodeoffset));
 396                         return 1;
 397                 }
 398
 399                 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
 400                         int req_index = -1;
 401                         int startDepth = fdt_node_depth(
 402                                 working_fdt, nodeoffset);
 403                         int curDepth = startDepth;
 404                         int cur_index = -1;
 405                         int nextNodeOffset = fdt_next_node(
 406                                 working_fdt, nodeoffset, &curDepth);
 407
 408                         if (subcmd[0] == 'n')
 409                                 req_index = hextoul(argv[5], NULL);
 410
 411                         while (curDepth > startDepth) {
 412                                 if (curDepth == startDepth + 1)
 413                                         cur_index++;
 414                                 if (subcmd[0] == 'n' &&
 415                                     cur_index == req_index) {
 416                                         const char *node_name;
 417
 418                                         node_name = fdt_get_name(working_fdt,
 419                                                                  nextNodeOffset,
 420                                                                  NULL);
 421                                         env_set(var, node_name);
 422                                         return 0;
 423                                 }
 424                                 nextNodeOffset = fdt_next_node(
 425                                         working_fdt, nextNodeOffset, &curDepth);
 426                                 if (nextNodeOffset < 0)
 427                                         break;
 428                         }
 429                         if (subcmd[0] == 's') {
 430                                 /* get the num nodes at this level */
 431                                 env_set_ulong(var, cur_index + 1);
 432                         } else {
 433                                 /* node index not found */
 434                                 printf("libfdt node not found\n");
 435                                 return 1;
 436                         }
 437                 } else {
 438                         nodep = fdt_getprop(
 439                                 working_fdt, nodeoffset, prop, &len);
 440                         if (len == 0) {
 441                                 /* no property value */
 442                                 env_set(var, "");
 443                                 return 0;
 444                         } else if (nodep && len > 0) {
 445                                 if (subcmd[0] == 'v') {
 446                                         int index = 0;
 447                                         int ret;
 448
 449                                         if (argc == 7)
 450                                                 index = simple_strtoul(argv[6], NULL, 10);
 451
 452                                         ret = fdt_value_env_set(nodep, len,
 453                                                                 var, index);
 454                                         if (ret != 0)
 455                                                 return ret;
 456                                 } else if (subcmd[0] == 'a') {
 457                                         /* Get address */
 458                                         char buf[11];
 459
 460                                         sprintf(buf, "0x%p", nodep);
 461                                         env_set(var, buf);
 462                                 } else if (subcmd[0] == 's') {
 463                                         /* Get size */
 464                                         char buf[11];
 465
 466                                         sprintf(buf, "0x%08X", len);
 467                                         env_set(var, buf);
 468                                 } else
 469                                         return CMD_RET_USAGE;
 470                                 return 0;
 471                         } else {
 472                                 printf("libfdt fdt_getprop(): %s\n",
 473                                         fdt_strerror(len));
 474                                 return 1;
 475                         }
 476                 }
 477
 478         /*
 479          * Print (recursive) / List (single level)
 480          */
 481         } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
 482                 int depth = MAX_LEVEL;  /* how deep to print */
 483                 char *pathp;            /* path */
 484                 char *prop;             /* property */
 485                 int  ret;               /* return value */
 486                 static char root[2] = "/";
 487
 488                 /*
 489                  * list is an alias for print, but limited to 1 level
 490                  */
 491                 if (argv[1][0] == 'l') {
 492                         depth = 1;
 493                 }
 494
 495                 /*
 496                  * Get the starting path.  The root node is an oddball,
 497                  * the offset is zero and has no name.
 498                  */
 499                 if (argc == 2)
 500                         pathp = root;
 501                 else
 502                         pathp = argv[2];
 503                 if (argc > 3)
 504                         prop = argv[3];
 505                 else
 506                         prop = NULL;
 507
 508                 ret = fdt_print(pathp, prop, depth);
 509                 if (ret != 0)
 510                         return ret;
 511
 512         /*
 513          * Remove a property/node
 514          */
 515         } else if (strncmp(argv[1], "rm", 2) == 0) {
 516                 int  nodeoffset;        /* node offset from libfdt */
 517                 int  err;
 518
 519                 /*
 520                  * Get the path.  The root node is an oddball, the offset
 521                  * is zero and has no name.
 522                  */
 523                 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
 524                 if (nodeoffset < 0) {
 525                         /*
 526                          * Not found or something else bad happened.
 527                          */
 528                         printf ("libfdt fdt_path_offset() returned %s\n",
 529                                 fdt_strerror(nodeoffset));
 530                         return 1;
 531                 }
 532                 /*
 533                  * Do the delete.  A fourth parameter means delete a property,
 534                  * otherwise delete the node.
 535                  */
 536                 if (argc > 3) {
 537                         err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
 538                         if (err < 0) {
 539                                 printf("libfdt fdt_delprop():  %s\n",
 540                                         fdt_strerror(err));
 541                                 return err;
 542                         }
 543                 } else {
 544                         err = fdt_del_node(working_fdt, nodeoffset);
 545                         if (err < 0) {
 546                                 printf("libfdt fdt_del_node():  %s\n",
 547                                         fdt_strerror(err));
 548                                 return err;
 549                         }
 550                 }
 551
 552         /*
 553          * Display header info
 554          */
 555         } else if (argv[1][0] == 'h') {
 556                 if (argc == 5)
 557                         return fdt_get_header_value(argc, argv);
 558
 559                 u32 version = fdt_version(working_fdt);
 560                 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
 561                 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
 562                        fdt_totalsize(working_fdt));
 563                 printf("off_dt_struct:\t\t0x%x\n",
 564                        fdt_off_dt_struct(working_fdt));
 565                 printf("off_dt_strings:\t\t0x%x\n",
 566                        fdt_off_dt_strings(working_fdt));
 567                 printf("off_mem_rsvmap:\t\t0x%x\n",
 568                        fdt_off_mem_rsvmap(working_fdt));
 569                 printf("version:\t\t%d\n", version);
 570                 printf("last_comp_version:\t%d\n",
 571                        fdt_last_comp_version(working_fdt));
 572                 if (version >= 2)
 573                         printf("boot_cpuid_phys:\t0x%x\n",
 574                                 fdt_boot_cpuid_phys(working_fdt));
 575                 if (version >= 3)
 576                         printf("size_dt_strings:\t0x%x\n",
 577                                 fdt_size_dt_strings(working_fdt));
 578                 if (version >= 17)
 579                         printf("size_dt_struct:\t\t0x%x\n",
 580                                 fdt_size_dt_struct(working_fdt));
 581                 printf("number mem_rsv:\t\t0x%x\n",
 582                        fdt_num_mem_rsv(working_fdt));
 583                 printf("\n");
 584
 585         /*
 586          * Set boot cpu id
 587          */
 588         } else if (strncmp(argv[1], "boo", 3) == 0) {
 589                 unsigned long tmp = hextoul(argv[2], NULL);
 590                 fdt_set_boot_cpuid_phys(working_fdt, tmp);
 591
 592         /*
 593          * memory command
 594          */
 595         } else if (strncmp(argv[1], "me", 2) == 0) {
 596                 uint64_t addr, size;
 597                 int err;
 598                 addr = simple_strtoull(argv[2], NULL, 16);
 599                 size = simple_strtoull(argv[3], NULL, 16);
 600                 err = fdt_fixup_memory(working_fdt, addr, size);
 601                 if (err < 0)
 602                         return err;
 603
 604         /*
 605          * mem reserve commands
 606          */
 607         } else if (strncmp(argv[1], "rs", 2) == 0) {
 608                 if (argv[2][0] == 'p') {
 609                         uint64_t addr, size;
 610                         int total = fdt_num_mem_rsv(working_fdt);
 611                         int j, err;
 612                         printf("index\t\t   start\t\t    size\n");
 613                         printf("-------------------------------"
 614                                 "-----------------\n");
 615                         for (j = 0; j < total; j++) {
 616                                 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
 617                                 if (err < 0) {
 618                                         printf("libfdt fdt_get_mem_rsv():  %s\n",
 619                                                         fdt_strerror(err));
 620                                         return err;
 621                                 }
 622                                 printf("    %x\t%08x%08x\t%08x%08x\n", j,
 623                                         (u32)(addr >> 32),
 624                                         (u32)(addr & 0xffffffff),
 625                                         (u32)(size >> 32),
 626                                         (u32)(size & 0xffffffff));
 627                         }
 628                 } else if (argv[2][0] == 'a') {
 629                         uint64_t addr, size;
 630                         int err;
 631                         addr = simple_strtoull(argv[3], NULL, 16);
 632                         size = simple_strtoull(argv[4], NULL, 16);
 633                         err = fdt_add_mem_rsv(working_fdt, addr, size);
 634
 635                         if (err < 0) {
 636                                 printf("libfdt fdt_add_mem_rsv():  %s\n",
 637                                         fdt_strerror(err));
 638                                 return err;
 639                         }
 640                 } else if (argv[2][0] == 'd') {
 641                         unsigned long idx = hextoul(argv[3], NULL);
 642                         int err = fdt_del_mem_rsv(working_fdt, idx);
 643
 644                         if (err < 0) {
 645                                 printf("libfdt fdt_del_mem_rsv():  %s\n",
 646                                         fdt_strerror(err));
 647                                 return err;
 648                         }
 649                 } else {
 650                         /* Unrecognized command */
 651                         return CMD_RET_USAGE;
 652                 }
 653         }
 654 #ifdef CONFIG_OF_BOARD_SETUP
 655         /* Call the board-specific fixup routine */
 656         else if (strncmp(argv[1], "boa", 3) == 0) {
 657                 int err = ft_board_setup(working_fdt, gd->bd);
 658
 659                 if (err) {
 660                         printf("Failed to update board information in FDT: %s\n",
 661                                fdt_strerror(err));
 662                         return CMD_RET_FAILURE;
 663                 }
 664 #ifdef CONFIG_ARCH_KEYSTONE
 665                 ft_board_setup_ex(working_fdt, gd->bd);
 666 #endif
 667         }
 668 #endif
 669         /* Create a chosen node */
 670         else if (strncmp(argv[1], "cho", 3) == 0) {
 671                 unsigned long initrd_start = 0, initrd_end = 0;
 672
 673                 if ((argc != 2) && (argc != 4))
 674                         return CMD_RET_USAGE;
 675
 676                 if (argc == 4) {
 677                         initrd_start = hextoul(argv[2], NULL);
 678                         initrd_end = initrd_start + hextoul(argv[3], NULL) - 1;
 679                 }
 680
 681                 fdt_chosen(working_fdt);
 682                 fdt_initrd(working_fdt, initrd_start, initrd_end);
 683
 684 #if defined(CONFIG_FIT_SIGNATURE)
 685         } else if (strncmp(argv[1], "che", 3) == 0) {
 686                 int cfg_noffset;
 687                 int ret;
 688                 unsigned long addr;
 689                 struct fdt_header *blob;
 690
 691                 if (!working_fdt)
 692                         return CMD_RET_FAILURE;
 693
 694                 if (argc > 2) {
 695                         addr = hextoul(argv[2], NULL);
 696                         blob = map_sysmem(addr, 0);
 697                 } else {
 698                         blob = (struct fdt_header *)gd->fdt_blob;
 699                 }
 700                 if (!fdt_valid(&blob))
 701                         return 1;
 702
 703                 gd->fdt_blob = blob;
 704                 cfg_noffset = fit_conf_get_node(working_fdt, NULL);
 705                 if (!cfg_noffset) {
 706                         printf("Could not find configuration node: %s\n",
 707                                fdt_strerror(cfg_noffset));
 708                         return CMD_RET_FAILURE;
 709                 }
 710
 711                 ret = fit_config_verify(working_fdt, cfg_noffset);
 712                 if (ret == 0)
 713                         return CMD_RET_SUCCESS;
 714                 else
 715                         return CMD_RET_FAILURE;
 716 #endif
 717
 718         }
 719 #ifdef CONFIG_OF_LIBFDT_OVERLAY
 720         /* apply an overlay */
 721         else if (strncmp(argv[1], "ap", 2) == 0) {
 722                 unsigned long addr;
 723                 struct fdt_header *blob;
 724                 int ret;
 725
 726                 if (argc != 3)
 727                         return CMD_RET_USAGE;
 728
 729                 if (!working_fdt)
 730                         return CMD_RET_FAILURE;
 731
 732                 addr = hextoul(argv[2], NULL);
 733                 blob = map_sysmem(addr, 0);
 734                 if (!fdt_valid(&blob))
 735                         return CMD_RET_FAILURE;
 736
 737                 /* apply method prints messages on error */
 738                 ret = fdt_overlay_apply_verbose(working_fdt, blob);
 739                 if (ret)
 740                         return CMD_RET_FAILURE;
 741         }
 742 #endif
 743         /* resize the fdt */
 744         else if (strncmp(argv[1], "re", 2) == 0) {
 745                 uint extrasize;
 746                 if (argc > 2)
 747                         extrasize = hextoul(argv[2], NULL);
 748                 else
 749                         extrasize = 0;
 750                 fdt_shrink_to_minimum(working_fdt, extrasize);
 751         }
 752         else {
 753                 /* Unrecognized command */
 754                 return CMD_RET_USAGE;
 755         }
 756
 757         return 0;
 758 }
 759
 760 /****************************************************************************/
 761
 762 /*
 763  * Parse the user's input, partially heuristic.  Valid formats:
 764  * <0x00112233 4 05>    - an array of cells.  Numbers follow standard
 765  *                      C conventions.
 766  * [00 11 22 .. nn] - byte stream
 767  * "string"     - If the the value doesn't start with "<" or "[", it is
 768  *                      treated as a string.  Note that the quotes are
 769  *                      stripped by the parser before we get the string.
 770  * newval: An array of strings containing the new property as specified
 771  *      on the command line
 772  * count: The number of strings in the array
 773  * data: A bytestream to be placed in the property
 774  * len: The length of the resulting bytestream
 775  */
 776 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
 777 {
 778         char *cp;               /* temporary char pointer */
 779         char *newp;             /* temporary newval char pointer */
 780         unsigned long tmp;      /* holds converted values */
 781         int stridx = 0;
 782
 783         *len = 0;
 784         newp = newval[0];
 785
 786         /* An array of cells */
 787         if (*newp == '<') {
 788                 newp++;
 789                 while ((*newp != '>') && (stridx < count)) {
 790                         /*
 791                          * Keep searching until we find that last ">"
 792                          * That way users don't have to escape the spaces
 793                          */
 794                         if (*newp == '\0') {
 795                                 newp = newval[++stridx];
 796                                 continue;
 797                         }
 798
 799                         cp = newp;
 800                         tmp = simple_strtoul(cp, &newp, 0);
 801                         if (*cp != '?')
 802                                 *(fdt32_t *)data = cpu_to_fdt32(tmp);
 803                         else
 804                                 newp++;
 805
 806                         data  += 4;
 807                         *len += 4;
 808
 809                         /* If the ptr didn't advance, something went wrong */
 810                         if ((newp - cp) <= 0) {
 811                                 printf("Sorry, I could not convert \"%s\"\n",
 812                                         cp);
 813                                 return 1;
 814                         }
 815
 816                         while (*newp == ' ')
 817                                 newp++;
 818                 }
 819
 820                 if (*newp != '>') {
 821                         printf("Unexpected character '%c'\n", *newp);
 822                         return 1;
 823                 }
 824         } else if (*newp == '[') {
 825                 /*
 826                  * Byte stream.  Convert the values.
 827                  */
 828                 newp++;
 829                 while ((stridx < count) && (*newp != ']')) {
 830                         while (*newp == ' ')
 831                                 newp++;
 832                         if (*newp == '\0') {
 833                                 newp = newval[++stridx];
 834                                 continue;
 835                         }
 836                         if (!isxdigit(*newp))
 837                                 break;
 838                         tmp = hextoul(newp, &newp);
 839                         *data++ = tmp & 0xFF;
 840                         *len    = *len + 1;
 841                 }
 842                 if (*newp != ']') {
 843                         printf("Unexpected character '%c'\n", *newp);
 844                         return 1;
 845                 }
 846         } else {
 847                 /*
 848                  * Assume it is one or more strings.  Copy it into our
 849                  * data area for convenience (including the
 850                  * terminating '\0's).
 851                  */
 852                 while (stridx < count) {
 853                         size_t length = strlen(newp) + 1;
 854                         strcpy(data, newp);
 855                         data += length;
 856                         *len += length;
 857                         newp = newval[++stridx];
 858                 }
 859         }
 860         return 0;
 861 }
 862
 863 /****************************************************************************/
 864
 865 /*
 866  * Heuristic to guess if this is a string or concatenated strings.
 867  */
 868
 869 static int is_printable_string(const void *data, int len)
 870 {
 871         const char *s = data;
 872
 873         /* zero length is not */
 874         if (len == 0)
 875                 return 0;
 876
 877         /* must terminate with zero or '\n' */
 878         if (s[len - 1] != '\0' && s[len - 1] != '\n')
 879                 return 0;
 880
 881         /* printable or a null byte (concatenated strings) */
 882         while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
 883                 /*
 884                  * If we see a null, there are three possibilities:
 885                  * 1) If len == 1, it is the end of the string, printable
 886                  * 2) Next character also a null, not printable.
 887                  * 3) Next character not a null, continue to check.
 888                  */
 889                 if (s[0] == '\0') {
 890                         if (len == 1)
 891                                 return 1;
 892                         if (s[1] == '\0')
 893                                 return 0;
 894                 }
 895                 s++;
 896                 len--;
 897         }
 898
 899         /* Not the null termination, or not done yet: not printable */
 900         if (*s != '\0' || (len != 0))
 901                 return 0;
 902
 903         return 1;
 904 }
 905
 906
 907 /*
 908  * Print the property in the best format, a heuristic guess.  Print as
 909  * a string, concatenated strings, a byte, word, double word, or (if all
 910  * else fails) it is printed as a stream of bytes.
 911  */
 912 static void print_data(const void *data, int len)
 913 {
 914         int j;
 915         const char *env_max_dump;
 916         ulong max_dump = ULONG_MAX;
 917
 918         /* no data, don't print */
 919         if (len == 0)
 920                 return;
 921
 922         env_max_dump = env_get("fdt_max_dump");
 923         if (env_max_dump)
 924                 max_dump = hextoul(env_max_dump, NULL);
 925
 926         /*
 927          * It is a string, but it may have multiple strings (embedded '\0's).
 928          */
 929         if (is_printable_string(data, len)) {
 930                 puts("\"");
 931                 j = 0;
 932                 while (j < len) {
 933                         if (j > 0)
 934                                 puts("\", \"");
 935                         puts(data);
 936                         j    += strlen(data) + 1;
 937                         data += strlen(data) + 1;
 938                 }
 939                 puts("\"");
 940                 return;
 941         }
 942
 943         if ((len %4) == 0) {
 944                 if (len > max_dump)
 945                         printf("* 0x%p [0x%08x]", data, len);
 946                 else {
 947                         const __be32 *p;
 948
 949                         printf("<");
 950                         for (j = 0, p = data; j < len/4; j++)
 951                                 printf("0x%08x%s", fdt32_to_cpu(p[j]),
 952                                         j < (len/4 - 1) ? " " : "");
 953                         printf(">");
 954                 }
 955         } else { /* anything else... hexdump */
 956                 if (len > max_dump)
 957                         printf("* 0x%p [0x%08x]", data, len);
 958                 else {
 959                         const u8 *s;
 960
 961                         printf("[");
 962                         for (j = 0, s = data; j < len; j++)
 963                                 printf("%02x%s", s[j], j < len - 1 ? " " : "");
 964                         printf("]");
 965                 }
 966         }
 967 }
 968
 969 /****************************************************************************/
 970
 971 /*
 972  * Recursively print (a portion of) the working_fdt.  The depth parameter
 973  * determines how deeply nested the fdt is printed.
 974  */
 975 static int fdt_print(const char *pathp, char *prop, int depth)
 976 {
 977         static char tabs[MAX_LEVEL+1] =
 978                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
 979                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
 980         const void *nodep;      /* property node pointer */
 981         int  nodeoffset;        /* node offset from libfdt */
 982         int  nextoffset;        /* next node offset from libfdt */
 983         uint32_t tag;           /* tag */
 984         int  len;               /* length of the property */
 985         int  level = 0;         /* keep track of nesting level */
 986         const struct fdt_property *fdt_prop;
 987
 988         nodeoffset = fdt_path_offset (working_fdt, pathp);
 989         if (nodeoffset < 0) {
 990                 /*
 991                  * Not found or something else bad happened.
 992                  */
 993                 printf ("libfdt fdt_path_offset() returned %s\n",
 994                         fdt_strerror(nodeoffset));
 995                 return 1;
 996         }
 997         /*
 998          * The user passed in a property as well as node path.
 999          * Print only the given property and then return.
1000          */
1001         if (prop) {
1002                 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
1003                 if (len == 0) {
1004                         /* no property value */
1005                         printf("%s %s\n", pathp, prop);
1006                         return 0;
1007                 } else if (nodep && len > 0) {
1008                         printf("%s = ", prop);
1009                         print_data (nodep, len);
1010                         printf("\n");
1011                         return 0;
1012                 } else {
1013                         printf ("libfdt fdt_getprop(): %s\n",
1014                                 fdt_strerror(len));
1015                         return 1;
1016                 }
1017         }
1018
1019         /*
1020          * The user passed in a node path and no property,
1021          * print the node and all subnodes.
1022          */
1023         while(level >= 0) {
1024                 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
1025                 switch(tag) {
1026                 case FDT_BEGIN_NODE:
1027                         pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
1028                         if (level <= depth) {
1029                                 if (pathp == NULL)
1030                                         pathp = "/* NULL pointer error */";
1031                                 if (*pathp == '\0')
1032                                         pathp = "/";    /* root is nameless */
1033                                 printf("%s%s {\n",
1034                                         &tabs[MAX_LEVEL - level], pathp);
1035                         }
1036                         level++;
1037                         if (level >= MAX_LEVEL) {
1038                                 printf("Nested too deep, aborting.\n");
1039                                 return 1;
1040                         }
1041                         break;
1042                 case FDT_END_NODE:
1043                         level--;
1044                         if (level <= depth)
1045                                 printf("%s};\n", &tabs[MAX_LEVEL - level]);
1046                         if (level == 0) {
1047                                 level = -1;             /* exit the loop */
1048                         }
1049                         break;
1050                 case FDT_PROP:
1051                         fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
1052                                         sizeof(*fdt_prop));
1053                         pathp    = fdt_string(working_fdt,
1054                                         fdt32_to_cpu(fdt_prop->nameoff));
1055                         len      = fdt32_to_cpu(fdt_prop->len);
1056                         nodep    = fdt_prop->data;
1057                         if (len < 0) {
1058                                 printf ("libfdt fdt_getprop(): %s\n",
1059                                         fdt_strerror(len));
1060                                 return 1;
1061                         } else if (len == 0) {
1062                                 /* the property has no value */
1063                                 if (level <= depth)
1064                                         printf("%s%s;\n",
1065                                                 &tabs[MAX_LEVEL - level],
1066                                                 pathp);
1067                         } else {
1068                                 if (level <= depth) {
1069                                         printf("%s%s = ",
1070                                                 &tabs[MAX_LEVEL - level],
1071                                                 pathp);
1072                                         print_data (nodep, len);
1073                                         printf(";\n");
1074                                 }
1075                         }
1076                         break;
1077                 case FDT_NOP:
1078                         printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
1079                         break;
1080                 case FDT_END:
1081                         return 1;
1082                 default:
1083                         if (level <= depth)
1084                                 printf("Unknown tag 0x%08X\n", tag);
1085                         return 1;
1086                 }
1087                 nodeoffset = nextoffset;
1088         }
1089         return 0;
1090 }
1091
1092 /********************************************************************/
1093 #ifdef CONFIG_SYS_LONGHELP
1094 static char fdt_help_text[] =
1095         "addr [-c] [-q] <addr> [<size>]  - Set the [control] fdt location to <addr>\n"
1096 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1097         "fdt apply <addr>                    - Apply overlay to the DT\n"
1098 #endif
1099 #ifdef CONFIG_OF_BOARD_SETUP
1100         "fdt boardsetup                      - Do board-specific set up\n"
1101 #endif
1102 #ifdef CONFIG_OF_SYSTEM_SETUP
1103         "fdt systemsetup                     - Do system-specific set up\n"
1104 #endif
1105         "fdt move   <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1106         "fdt resize [<extrasize>]            - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1107         "fdt print  <path> [<prop>]          - Recursive print starting at <path>\n"
1108         "fdt list   <path> [<prop>]          - Print one level starting at <path>\n"
1109         "fdt get value <var> <path> <prop> [<index>] - Get <property> and store in <var>\n"
1110         "                                      In case of stringlist property, use optional <index>\n"
1111         "                                      to select string within the stringlist. Default is 0.\n"
1112         "fdt get name <var> <path> <index>   - Get name of node <index> and store in <var>\n"
1113         "fdt get addr <var> <path> <prop>    - Get start address of <property> and store in <var>\n"
1114         "fdt get size <var> <path> [<prop>]  - Get size of [<property>] or num nodes and store in <var>\n"
1115         "fdt set    <path> <prop> [<val>]    - Set <property> [to <val>]\n"
1116         "fdt mknode <path> <node>            - Create a new node after <path>\n"
1117         "fdt rm     <path> [<prop>]          - Delete the node or <property>\n"
1118         "fdt header [get <var> <member>]     - Display header info\n"
1119         "                                      get - get header member <member> and store it in <var>\n"
1120         "fdt bootcpu <id>                    - Set boot cpuid\n"
1121         "fdt memory <addr> <size>            - Add/Update memory node\n"
1122         "fdt rsvmem print                    - Show current mem reserves\n"
1123         "fdt rsvmem add <addr> <size>        - Add a mem reserve\n"
1124         "fdt rsvmem delete <index>           - Delete a mem reserves\n"
1125         "fdt chosen [<start> <size>]         - Add/update the /chosen branch in the tree\n"
1126         "                                        <start>/<size> - initrd start addr/size\n"
1127 #if defined(CONFIG_FIT_SIGNATURE)
1128         "fdt checksign [<addr>]              - check FIT signature\n"
1129         "                                        <start> - addr of key blob\n"
1130         "                                                  default gd->fdt_blob\n"
1131 #endif
1132         "NOTE: Dereference aliases by omitting the leading '/', "
1133                 "e.g. fdt print ethernet0.";
1134 #endif
1135
1136 U_BOOT_CMD(
1137         fdt,    255,    0,      do_fdt,
1138         "flattened device tree utility commands", fdt_help_text
1139 );