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