cmd/fdt.c

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