git.sur5r.net Git - u-boot/blob - cmd/fdt.c

   1 /*
   2  * (C) Copyright 2007
   3  * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
   4  * Based on code written by:
   5  *   Pantelis Antoniou <pantelis.antoniou@gmail.com> and
   6  *   Matthew McClintock <msm@freescale.com>
   7  *
   8  * SPDX-License-Identifier:     GPL-2.0+
   9  */
  10
  11 #include <common.h>
  12 #include <command.h>
  13 #include <linux/ctype.h>
  14 #include <linux/types.h>
  15 #include <asm/global_data.h>
  16 #include <libfdt.h>
  17 #include <fdt_support.h>
  18 #include <mapmem.h>
  19 #include <asm/io.h>
  20
  21 #define MAX_LEVEL       32              /* how deeply nested we will go */
  22 #define SCRATCHPAD      1024            /* bytes of scratchpad memory */
  23 #define CMD_FDT_MAX_DUMP 64
  24
  25 /*
  26  * Global data (for the gd->bd)
  27  */
  28 DECLARE_GLOBAL_DATA_PTR;
  29
  30 static int fdt_valid(struct fdt_header **blobp);
  31 static int fdt_parse_prop(char *const*newval, int count, char *data, int *len);
  32 static int fdt_print(const char *pathp, char *prop, int depth);
  33 static int is_printable_string(const void *data, int len);
  34
  35 /*
  36  * The working_fdt points to our working flattened device tree.
  37  */
  38 struct fdt_header *working_fdt;
  39
  40 void set_working_fdt_addr(ulong addr)
  41 {
  42         void *buf;
  43
  44         buf = map_sysmem(addr, 0);
  45         working_fdt = buf;
  46         setenv_hex("fdtaddr", addr);
  47 }
  48
  49 /*
  50  * Get a value from the fdt and format it to be set in the environment
  51  */
  52 static int fdt_value_setenv(const void *nodep, int len, const char *var)
  53 {
  54         if (is_printable_string(nodep, len))
  55                 setenv(var, (void *)nodep);
  56         else if (len == 4) {
  57                 char buf[11];
  58
  59                 sprintf(buf, "0x%08X", fdt32_to_cpu(*(fdt32_t *)nodep));
  60                 setenv(var, buf);
  61         } else if (len%4 == 0 && len <= 20) {
  62                 /* Needed to print things like sha1 hashes. */
  63                 char buf[41];
  64                 int i;
  65
  66                 for (i = 0; i < len; i += sizeof(unsigned int))
  67                         sprintf(buf + (i * 2), "%08x",
  68                                 *(unsigned int *)(nodep + i));
  69                 setenv(var, buf);
  70         } else {
  71                 printf("error: unprintable value\n");
  72                 return 1;
  73         }
  74         return 0;
  75 }
  76
  77 /*
  78  * Flattened Device Tree command, see the help for parameter definitions.
  79  */
  80 static int do_fdt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  81 {
  82         if (argc < 2)
  83                 return CMD_RET_USAGE;
  84
  85         /*
  86          * Set the address of the fdt
  87          */
  88         if (strncmp(argv[1], "ad", 2) == 0) {
  89                 unsigned long addr;
  90                 int control = 0;
  91                 struct fdt_header *blob;
  92                 /*
  93                  * Set the address [and length] of the fdt.
  94                  */
  95                 argc -= 2;
  96                 argv += 2;
  97 /* Temporary #ifdef - some archs don't have fdt_blob yet */
  98 #ifdef CONFIG_OF_CONTROL
  99                 if (argc && !strcmp(*argv, "-c")) {
 100                         control = 1;
 101                         argc--;
 102                         argv++;
 103                 }
 104 #endif
 105                 if (argc == 0) {
 106                         if (control)
 107                                 blob = (struct fdt_header *)gd->fdt_blob;
 108                         else
 109                                 blob = working_fdt;
 110                         if (!blob || !fdt_valid(&blob))
 111                                 return 1;
 112                         printf("The address of the fdt is %#08lx\n",
 113                                control ? (ulong)map_to_sysmem(blob) :
 114                                         getenv_hex("fdtaddr", 0));
 115                         return 0;
 116                 }
 117
 118                 addr = simple_strtoul(argv[0], NULL, 16);
 119                 blob = map_sysmem(addr, 0);
 120                 if (!fdt_valid(&blob))
 121                         return 1;
 122                 if (control)
 123                         gd->fdt_blob = blob;
 124                 else
 125                         set_working_fdt_addr(addr);
 126
 127                 if (argc >= 2) {
 128                         int  len;
 129                         int  err;
 130                         /*
 131                          * Optional new length
 132                          */
 133                         len = simple_strtoul(argv[1], NULL, 16);
 134                         if (len < fdt_totalsize(blob)) {
 135                                 printf ("New length %d < existing length %d, "
 136                                         "ignoring.\n",
 137                                         len, fdt_totalsize(blob));
 138                         } else {
 139                                 /*
 140                                  * Open in place with a new length.
 141                                  */
 142                                 err = fdt_open_into(blob, blob, len);
 143                                 if (err != 0) {
 144                                         printf ("libfdt fdt_open_into(): %s\n",
 145                                                 fdt_strerror(err));
 146                                 }
 147                         }
 148                 }
 149
 150                 return CMD_RET_SUCCESS;
 151         }
 152
 153         if (!working_fdt) {
 154                 puts(
 155                         "No FDT memory address configured. Please configure\n"
 156                         "the FDT address via \"fdt addr <address>\" command.\n"
 157                         "Aborting!\n");
 158                 return CMD_RET_FAILURE;
 159         }
 160
 161         /*
 162          * Move the working_fdt
 163          */
 164         if (strncmp(argv[1], "mo", 2) == 0) {
 165                 struct fdt_header *newaddr;
 166                 int  len;
 167                 int  err;
 168
 169                 if (argc < 4)
 170                         return CMD_RET_USAGE;
 171
 172                 /*
 173                  * Set the address and length of the fdt.
 174                  */
 175                 working_fdt = (struct fdt_header *)simple_strtoul(argv[2], NULL, 16);
 176                 if (!fdt_valid(&working_fdt))
 177                         return 1;
 178
 179                 newaddr = (struct fdt_header *)simple_strtoul(argv[3],NULL,16);
 180
 181                 /*
 182                  * If the user specifies a length, use that.  Otherwise use the
 183                  * current length.
 184                  */
 185                 if (argc <= 4) {
 186                         len = fdt_totalsize(working_fdt);
 187                 } else {
 188                         len = simple_strtoul(argv[4], NULL, 16);
 189                         if (len < fdt_totalsize(working_fdt)) {
 190                                 printf ("New length 0x%X < existing length "
 191                                         "0x%X, aborting.\n",
 192                                         len, fdt_totalsize(working_fdt));
 193                                 return 1;
 194                         }
 195                 }
 196
 197                 /*
 198                  * Copy to the new location.
 199                  */
 200                 err = fdt_open_into(working_fdt, newaddr, len);
 201                 if (err != 0) {
 202                         printf ("libfdt fdt_open_into(): %s\n",
 203                                 fdt_strerror(err));
 204                         return 1;
 205                 }
 206                 working_fdt = newaddr;
 207 #ifdef CONFIG_OF_SYSTEM_SETUP
 208         /* Call the board-specific fixup routine */
 209         } else if (strncmp(argv[1], "sys", 3) == 0) {
 210                 int err = ft_system_setup(working_fdt, gd->bd);
 211
 212                 if (err) {
 213                         printf("Failed to add system information to FDT: %s\n",
 214                                fdt_strerror(err));
 215                         return CMD_RET_FAILURE;
 216                 }
 217 #endif
 218         /*
 219          * Make a new node
 220          */
 221         } else if (strncmp(argv[1], "mk", 2) == 0) {
 222                 char *pathp;            /* path */
 223                 char *nodep;            /* new node to add */
 224                 int  nodeoffset;        /* node offset from libfdt */
 225                 int  err;
 226
 227                 /*
 228                  * Parameters: Node path, new node to be appended to the path.
 229                  */
 230                 if (argc < 4)
 231                         return CMD_RET_USAGE;
 232
 233                 pathp = argv[2];
 234                 nodep = argv[3];
 235
 236                 nodeoffset = fdt_path_offset (working_fdt, pathp);
 237                 if (nodeoffset < 0) {
 238                         /*
 239                          * Not found or something else bad happened.
 240                          */
 241                         printf ("libfdt fdt_path_offset() returned %s\n",
 242                                 fdt_strerror(nodeoffset));
 243                         return 1;
 244                 }
 245                 err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
 246                 if (err < 0) {
 247                         printf ("libfdt fdt_add_subnode(): %s\n",
 248                                 fdt_strerror(err));
 249                         return 1;
 250                 }
 251
 252         /*
 253          * Set the value of a property in the working_fdt.
 254          */
 255         } else if (argv[1][0] == 's') {
 256                 char *pathp;            /* path */
 257                 char *prop;             /* property */
 258                 int  nodeoffset;        /* node offset from libfdt */
 259                 static char data[SCRATCHPAD];   /* storage for the property */
 260                 const void *ptmp;
 261                 int  len;               /* new length of the property */
 262                 int  ret;               /* return value */
 263
 264                 /*
 265                  * Parameters: Node path, property, optional value.
 266                  */
 267                 if (argc < 4)
 268                         return CMD_RET_USAGE;
 269
 270                 pathp  = argv[2];
 271                 prop   = argv[3];
 272
 273                 nodeoffset = fdt_path_offset (working_fdt, pathp);
 274                 if (nodeoffset < 0) {
 275                         /*
 276                          * Not found or something else bad happened.
 277                          */
 278                         printf ("libfdt fdt_path_offset() returned %s\n",
 279                                 fdt_strerror(nodeoffset));
 280                         return 1;
 281                 }
 282
 283                 if (argc == 4) {
 284                         len = 0;
 285                 } else {
 286                         ptmp = fdt_getprop(working_fdt, nodeoffset, prop, &len);
 287                         if (len > SCRATCHPAD) {
 288                                 printf("prop (%d) doesn't fit in scratchpad!\n",
 289                                        len);
 290                                 return 1;
 291                         }
 292                         memcpy(data, ptmp, len);
 293                         ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
 294                         if (ret != 0)
 295                                 return ret;
 296                 }
 297
 298                 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
 299                 if (ret < 0) {
 300                         printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
 301                         return 1;
 302                 }
 303
 304         /********************************************************************
 305          * Get the value of a property in the working_fdt.
 306          ********************************************************************/
 307         } else if (argv[1][0] == 'g') {
 308                 char *subcmd;           /* sub-command */
 309                 char *pathp;            /* path */
 310                 char *prop;             /* property */
 311                 char *var;              /* variable to store result */
 312                 int  nodeoffset;        /* node offset from libfdt */
 313                 const void *nodep;      /* property node pointer */
 314                 int  len = 0;           /* new length of the property */
 315
 316                 /*
 317                  * Parameters: Node path, property, optional value.
 318                  */
 319                 if (argc < 5)
 320                         return CMD_RET_USAGE;
 321
 322                 subcmd = argv[2];
 323
 324                 if (argc < 6 && subcmd[0] != 's')
 325                         return CMD_RET_USAGE;
 326
 327                 var    = argv[3];
 328                 pathp  = argv[4];
 329                 prop   = argv[5];
 330
 331                 nodeoffset = fdt_path_offset(working_fdt, pathp);
 332                 if (nodeoffset < 0) {
 333                         /*
 334                          * Not found or something else bad happened.
 335                          */
 336                         printf("libfdt fdt_path_offset() returned %s\n",
 337                                 fdt_strerror(nodeoffset));
 338                         return 1;
 339                 }
 340
 341                 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
 342                         int reqIndex = -1;
 343                         int startDepth = fdt_node_depth(
 344                                 working_fdt, nodeoffset);
 345                         int curDepth = startDepth;
 346                         int curIndex = -1;
 347                         int nextNodeOffset = fdt_next_node(
 348                                 working_fdt, nodeoffset, &curDepth);
 349
 350                         if (subcmd[0] == 'n')
 351                                 reqIndex = simple_strtoul(argv[5], NULL, 16);
 352
 353                         while (curDepth > startDepth) {
 354                                 if (curDepth == startDepth + 1)
 355                                         curIndex++;
 356                                 if (subcmd[0] == 'n' && curIndex == reqIndex) {
 357                                         const char *nodeName = fdt_get_name(
 358                                             working_fdt, nextNodeOffset, NULL);
 359
 360                                         setenv(var, (char *)nodeName);
 361                                         return 0;
 362                                 }
 363                                 nextNodeOffset = fdt_next_node(
 364                                         working_fdt, nextNodeOffset, &curDepth);
 365                                 if (nextNodeOffset < 0)
 366                                         break;
 367                         }
 368                         if (subcmd[0] == 's') {
 369                                 /* get the num nodes at this level */
 370                                 setenv_ulong(var, curIndex + 1);
 371                         } else {
 372                                 /* node index not found */
 373                                 printf("libfdt node not found\n");
 374                                 return 1;
 375                         }
 376                 } else {
 377                         nodep = fdt_getprop(
 378                                 working_fdt, nodeoffset, prop, &len);
 379                         if (len == 0) {
 380                                 /* no property value */
 381                                 setenv(var, "");
 382                                 return 0;
 383                         } else if (nodep && len > 0) {
 384                                 if (subcmd[0] == 'v') {
 385                                         int ret;
 386
 387                                         ret = fdt_value_setenv(nodep, len, var);
 388                                         if (ret != 0)
 389                                                 return ret;
 390                                 } else if (subcmd[0] == 'a') {
 391                                         /* Get address */
 392                                         char buf[11];
 393
 394                                         sprintf(buf, "0x%p", nodep);
 395                                         setenv(var, buf);
 396                                 } else if (subcmd[0] == 's') {
 397                                         /* Get size */
 398                                         char buf[11];
 399
 400                                         sprintf(buf, "0x%08X", len);
 401                                         setenv(var, buf);
 402                                 } else
 403                                         return CMD_RET_USAGE;
 404                                 return 0;
 405                         } else {
 406                                 printf("libfdt fdt_getprop(): %s\n",
 407                                         fdt_strerror(len));
 408                                 return 1;
 409                         }
 410                 }
 411
 412         /*
 413          * Print (recursive) / List (single level)
 414          */
 415         } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
 416                 int depth = MAX_LEVEL;  /* how deep to print */
 417                 char *pathp;            /* path */
 418                 char *prop;             /* property */
 419                 int  ret;               /* return value */
 420                 static char root[2] = "/";
 421
 422                 /*
 423                  * list is an alias for print, but limited to 1 level
 424                  */
 425                 if (argv[1][0] == 'l') {
 426                         depth = 1;
 427                 }
 428
 429                 /*
 430                  * Get the starting path.  The root node is an oddball,
 431                  * the offset is zero and has no name.
 432                  */
 433                 if (argc == 2)
 434                         pathp = root;
 435                 else
 436                         pathp = argv[2];
 437                 if (argc > 3)
 438                         prop = argv[3];
 439                 else
 440                         prop = NULL;
 441
 442                 ret = fdt_print(pathp, prop, depth);
 443                 if (ret != 0)
 444                         return ret;
 445
 446         /*
 447          * Remove a property/node
 448          */
 449         } else if (strncmp(argv[1], "rm", 2) == 0) {
 450                 int  nodeoffset;        /* node offset from libfdt */
 451                 int  err;
 452
 453                 /*
 454                  * Get the path.  The root node is an oddball, the offset
 455                  * is zero and has no name.
 456                  */
 457                 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
 458                 if (nodeoffset < 0) {
 459                         /*
 460                          * Not found or something else bad happened.
 461                          */
 462                         printf ("libfdt fdt_path_offset() returned %s\n",
 463                                 fdt_strerror(nodeoffset));
 464                         return 1;
 465                 }
 466                 /*
 467                  * Do the delete.  A fourth parameter means delete a property,
 468                  * otherwise delete the node.
 469                  */
 470                 if (argc > 3) {
 471                         err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
 472                         if (err < 0) {
 473                                 printf("libfdt fdt_delprop():  %s\n",
 474                                         fdt_strerror(err));
 475                                 return err;
 476                         }
 477                 } else {
 478                         err = fdt_del_node(working_fdt, nodeoffset);
 479                         if (err < 0) {
 480                                 printf("libfdt fdt_del_node():  %s\n",
 481                                         fdt_strerror(err));
 482                                 return err;
 483                         }
 484                 }
 485
 486         /*
 487          * Display header info
 488          */
 489         } else if (argv[1][0] == 'h') {
 490                 u32 version = fdt_version(working_fdt);
 491                 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
 492                 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
 493                        fdt_totalsize(working_fdt));
 494                 printf("off_dt_struct:\t\t0x%x\n",
 495                        fdt_off_dt_struct(working_fdt));
 496                 printf("off_dt_strings:\t\t0x%x\n",
 497                        fdt_off_dt_strings(working_fdt));
 498                 printf("off_mem_rsvmap:\t\t0x%x\n",
 499                        fdt_off_mem_rsvmap(working_fdt));
 500                 printf("version:\t\t%d\n", version);
 501                 printf("last_comp_version:\t%d\n",
 502                        fdt_last_comp_version(working_fdt));
 503                 if (version >= 2)
 504                         printf("boot_cpuid_phys:\t0x%x\n",
 505                                 fdt_boot_cpuid_phys(working_fdt));
 506                 if (version >= 3)
 507                         printf("size_dt_strings:\t0x%x\n",
 508                                 fdt_size_dt_strings(working_fdt));
 509                 if (version >= 17)
 510                         printf("size_dt_struct:\t\t0x%x\n",
 511                                 fdt_size_dt_struct(working_fdt));
 512                 printf("number mem_rsv:\t\t0x%x\n",
 513                        fdt_num_mem_rsv(working_fdt));
 514                 printf("\n");
 515
 516         /*
 517          * Set boot cpu id
 518          */
 519         } else if (strncmp(argv[1], "boo", 3) == 0) {
 520                 unsigned long tmp = simple_strtoul(argv[2], NULL, 16);
 521                 fdt_set_boot_cpuid_phys(working_fdt, tmp);
 522
 523         /*
 524          * memory command
 525          */
 526         } else if (strncmp(argv[1], "me", 2) == 0) {
 527                 uint64_t addr, size;
 528                 int err;
 529                 addr = simple_strtoull(argv[2], NULL, 16);
 530                 size = simple_strtoull(argv[3], NULL, 16);
 531                 err = fdt_fixup_memory(working_fdt, addr, size);
 532                 if (err < 0)
 533                         return err;
 534
 535         /*
 536          * mem reserve commands
 537          */
 538         } else if (strncmp(argv[1], "rs", 2) == 0) {
 539                 if (argv[2][0] == 'p') {
 540                         uint64_t addr, size;
 541                         int total = fdt_num_mem_rsv(working_fdt);
 542                         int j, err;
 543                         printf("index\t\t   start\t\t    size\n");
 544                         printf("-------------------------------"
 545                                 "-----------------\n");
 546                         for (j = 0; j < total; j++) {
 547                                 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
 548                                 if (err < 0) {
 549                                         printf("libfdt fdt_get_mem_rsv():  %s\n",
 550                                                         fdt_strerror(err));
 551                                         return err;
 552                                 }
 553                                 printf("    %x\t%08x%08x\t%08x%08x\n", j,
 554                                         (u32)(addr >> 32),
 555                                         (u32)(addr & 0xffffffff),
 556                                         (u32)(size >> 32),
 557                                         (u32)(size & 0xffffffff));
 558                         }
 559                 } else if (argv[2][0] == 'a') {
 560                         uint64_t addr, size;
 561                         int err;
 562                         addr = simple_strtoull(argv[3], NULL, 16);
 563                         size = simple_strtoull(argv[4], NULL, 16);
 564                         err = fdt_add_mem_rsv(working_fdt, addr, size);
 565
 566                         if (err < 0) {
 567                                 printf("libfdt fdt_add_mem_rsv():  %s\n",
 568                                         fdt_strerror(err));
 569                                 return err;
 570                         }
 571                 } else if (argv[2][0] == 'd') {
 572                         unsigned long idx = simple_strtoul(argv[3], NULL, 16);
 573                         int err = fdt_del_mem_rsv(working_fdt, idx);
 574
 575                         if (err < 0) {
 576                                 printf("libfdt fdt_del_mem_rsv():  %s\n",
 577                                         fdt_strerror(err));
 578                                 return err;
 579                         }
 580                 } else {
 581                         /* Unrecognized command */
 582                         return CMD_RET_USAGE;
 583                 }
 584         }
 585 #ifdef CONFIG_OF_BOARD_SETUP
 586         /* Call the board-specific fixup routine */
 587         else if (strncmp(argv[1], "boa", 3) == 0) {
 588                 int err = ft_board_setup(working_fdt, gd->bd);
 589
 590                 if (err) {
 591                         printf("Failed to update board information in FDT: %s\n",
 592                                fdt_strerror(err));
 593                         return CMD_RET_FAILURE;
 594                 }
 595         }
 596 #endif
 597         /* Create a chosen node */
 598         else if (strncmp(argv[1], "cho", 3) == 0) {
 599                 unsigned long initrd_start = 0, initrd_end = 0;
 600
 601                 if ((argc != 2) && (argc != 4))
 602                         return CMD_RET_USAGE;
 603
 604                 if (argc == 4) {
 605                         initrd_start = simple_strtoul(argv[2], NULL, 16);
 606                         initrd_end = simple_strtoul(argv[3], NULL, 16);
 607                 }
 608
 609                 fdt_chosen(working_fdt);
 610                 fdt_initrd(working_fdt, initrd_start, initrd_end);
 611
 612 #if defined(CONFIG_FIT_SIGNATURE)
 613         } else if (strncmp(argv[1], "che", 3) == 0) {
 614                 int cfg_noffset;
 615                 int ret;
 616                 unsigned long addr;
 617                 struct fdt_header *blob;
 618
 619                 if (!working_fdt)
 620                         return CMD_RET_FAILURE;
 621
 622                 if (argc > 2) {
 623                         addr = simple_strtoul(argv[2], NULL, 16);
 624                         blob = map_sysmem(addr, 0);
 625                 } else {
 626                         blob = (struct fdt_header *)gd->fdt_blob;
 627                 }
 628                 if (!fdt_valid(&blob))
 629                         return 1;
 630
 631                 gd->fdt_blob = blob;
 632                 cfg_noffset = fit_conf_get_node(working_fdt, NULL);
 633                 if (!cfg_noffset) {
 634                         printf("Could not find configuration node: %s\n",
 635                                fdt_strerror(cfg_noffset));
 636                         return CMD_RET_FAILURE;
 637                 }
 638
 639                 ret = fit_config_verify(working_fdt, cfg_noffset);
 640                 if (ret == 0)
 641                         return CMD_RET_SUCCESS;
 642                 else
 643                         return CMD_RET_FAILURE;
 644 #endif
 645
 646         }
 647 #ifdef CONFIG_OF_LIBFDT_OVERLAY
 648         /* apply an overlay */
 649         else if (strncmp(argv[1], "ap", 2) == 0) {
 650                 unsigned long addr;
 651                 struct fdt_header *blob;
 652                 int ret;
 653
 654                 if (argc != 3)
 655                         return CMD_RET_USAGE;
 656
 657                 if (!working_fdt)
 658                         return CMD_RET_FAILURE;
 659
 660                 addr = simple_strtoul(argv[2], NULL, 16);
 661                 blob = map_sysmem(addr, 0);
 662                 if (!fdt_valid(&blob))
 663                         return CMD_RET_FAILURE;
 664
 665                 ret = fdt_overlay_apply(working_fdt, blob);
 666                 if (ret) {
 667                         printf("fdt_overlay_apply(): %s\n", fdt_strerror(ret));
 668                         return CMD_RET_FAILURE;
 669                 }
 670         }
 671 #endif
 672         /* resize the fdt */
 673         else if (strncmp(argv[1], "re", 2) == 0) {
 674                 uint extrasize;
 675                 if (argc > 2)
 676                         extrasize = simple_strtoul(argv[2], NULL, 16);
 677                 else
 678                         extrasize = 0;
 679                 fdt_shrink_to_minimum(working_fdt, extrasize);
 680         }
 681         else {
 682                 /* Unrecognized command */
 683                 return CMD_RET_USAGE;
 684         }
 685
 686         return 0;
 687 }
 688
 689 /****************************************************************************/
 690
 691 /**
 692  * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
 693  *
 694  * @blobp: Pointer to FDT pointer
 695  * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
 696  */
 697 static int fdt_valid(struct fdt_header **blobp)
 698 {
 699         const void *blob = *blobp;
 700         int err;
 701
 702         if (blob == NULL) {
 703                 printf ("The address of the fdt is invalid (NULL).\n");
 704                 return 0;
 705         }
 706
 707         err = fdt_check_header(blob);
 708         if (err == 0)
 709                 return 1;       /* valid */
 710
 711         if (err < 0) {
 712                 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
 713                 /*
 714                  * Be more informative on bad version.
 715                  */
 716                 if (err == -FDT_ERR_BADVERSION) {
 717                         if (fdt_version(blob) <
 718                             FDT_FIRST_SUPPORTED_VERSION) {
 719                                 printf (" - too old, fdt %d < %d",
 720                                         fdt_version(blob),
 721                                         FDT_FIRST_SUPPORTED_VERSION);
 722                         }
 723                         if (fdt_last_comp_version(blob) >
 724                             FDT_LAST_SUPPORTED_VERSION) {
 725                                 printf (" - too new, fdt %d > %d",
 726                                         fdt_version(blob),
 727                                         FDT_LAST_SUPPORTED_VERSION);
 728                         }
 729                 }
 730                 printf("\n");
 731                 *blobp = NULL;
 732                 return 0;
 733         }
 734         return 1;
 735 }
 736
 737 /****************************************************************************/
 738
 739 /*
 740  * Parse the user's input, partially heuristic.  Valid formats:
 741  * <0x00112233 4 05>    - an array of cells.  Numbers follow standard
 742  *                      C conventions.
 743  * [00 11 22 .. nn] - byte stream
 744  * "string"     - If the the value doesn't start with "<" or "[", it is
 745  *                      treated as a string.  Note that the quotes are
 746  *                      stripped by the parser before we get the string.
 747  * newval: An array of strings containing the new property as specified
 748  *      on the command line
 749  * count: The number of strings in the array
 750  * data: A bytestream to be placed in the property
 751  * len: The length of the resulting bytestream
 752  */
 753 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
 754 {
 755         char *cp;               /* temporary char pointer */
 756         char *newp;             /* temporary newval char pointer */
 757         unsigned long tmp;      /* holds converted values */
 758         int stridx = 0;
 759
 760         *len = 0;
 761         newp = newval[0];
 762
 763         /* An array of cells */
 764         if (*newp == '<') {
 765                 newp++;
 766                 while ((*newp != '>') && (stridx < count)) {
 767                         /*
 768                          * Keep searching until we find that last ">"
 769                          * That way users don't have to escape the spaces
 770                          */
 771                         if (*newp == '\0') {
 772                                 newp = newval[++stridx];
 773                                 continue;
 774                         }
 775
 776                         cp = newp;
 777                         tmp = simple_strtoul(cp, &newp, 0);
 778                         if (*cp != '?')
 779                                 *(fdt32_t *)data = cpu_to_fdt32(tmp);
 780                         else
 781                                 newp++;
 782
 783                         data  += 4;
 784                         *len += 4;
 785
 786                         /* If the ptr didn't advance, something went wrong */
 787                         if ((newp - cp) <= 0) {
 788                                 printf("Sorry, I could not convert \"%s\"\n",
 789                                         cp);
 790                                 return 1;
 791                         }
 792
 793                         while (*newp == ' ')
 794                                 newp++;
 795                 }
 796
 797                 if (*newp != '>') {
 798                         printf("Unexpected character '%c'\n", *newp);
 799                         return 1;
 800                 }
 801         } else if (*newp == '[') {
 802                 /*
 803                  * Byte stream.  Convert the values.
 804                  */
 805                 newp++;
 806                 while ((stridx < count) && (*newp != ']')) {
 807                         while (*newp == ' ')
 808                                 newp++;
 809                         if (*newp == '\0') {
 810                                 newp = newval[++stridx];
 811                                 continue;
 812                         }
 813                         if (!isxdigit(*newp))
 814                                 break;
 815                         tmp = simple_strtoul(newp, &newp, 16);
 816                         *data++ = tmp & 0xFF;
 817                         *len    = *len + 1;
 818                 }
 819                 if (*newp != ']') {
 820                         printf("Unexpected character '%c'\n", *newp);
 821                         return 1;
 822                 }
 823         } else {
 824                 /*
 825                  * Assume it is one or more strings.  Copy it into our
 826                  * data area for convenience (including the
 827                  * terminating '\0's).
 828                  */
 829                 while (stridx < count) {
 830                         size_t length = strlen(newp) + 1;
 831                         strcpy(data, newp);
 832                         data += length;
 833                         *len += length;
 834                         newp = newval[++stridx];
 835                 }
 836         }
 837         return 0;
 838 }
 839
 840 /****************************************************************************/
 841
 842 /*
 843  * Heuristic to guess if this is a string or concatenated strings.
 844  */
 845
 846 static int is_printable_string(const void *data, int len)
 847 {
 848         const char *s = data;
 849
 850         /* zero length is not */
 851         if (len == 0)
 852                 return 0;
 853
 854         /* must terminate with zero or '\n' */
 855         if (s[len - 1] != '\0' && s[len - 1] != '\n')
 856                 return 0;
 857
 858         /* printable or a null byte (concatenated strings) */
 859         while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
 860                 /*
 861                  * If we see a null, there are three possibilities:
 862                  * 1) If len == 1, it is the end of the string, printable
 863                  * 2) Next character also a null, not printable.
 864                  * 3) Next character not a null, continue to check.
 865                  */
 866                 if (s[0] == '\0') {
 867                         if (len == 1)
 868                                 return 1;
 869                         if (s[1] == '\0')
 870                                 return 0;
 871                 }
 872                 s++;
 873                 len--;
 874         }
 875
 876         /* Not the null termination, or not done yet: not printable */
 877         if (*s != '\0' || (len != 0))
 878                 return 0;
 879
 880         return 1;
 881 }
 882
 883
 884 /*
 885  * Print the property in the best format, a heuristic guess.  Print as
 886  * a string, concatenated strings, a byte, word, double word, or (if all
 887  * else fails) it is printed as a stream of bytes.
 888  */
 889 static void print_data(const void *data, int len)
 890 {
 891         int j;
 892
 893         /* no data, don't print */
 894         if (len == 0)
 895                 return;
 896
 897         /*
 898          * It is a string, but it may have multiple strings (embedded '\0's).
 899          */
 900         if (is_printable_string(data, len)) {
 901                 puts("\"");
 902                 j = 0;
 903                 while (j < len) {
 904                         if (j > 0)
 905                                 puts("\", \"");
 906                         puts(data);
 907                         j    += strlen(data) + 1;
 908                         data += strlen(data) + 1;
 909                 }
 910                 puts("\"");
 911                 return;
 912         }
 913
 914         if ((len %4) == 0) {
 915                 if (len > CMD_FDT_MAX_DUMP)
 916                         printf("* 0x%p [0x%08x]", data, len);
 917                 else {
 918                         const __be32 *p;
 919
 920                         printf("<");
 921                         for (j = 0, p = data; j < len/4; j++)
 922                                 printf("0x%08x%s", fdt32_to_cpu(p[j]),
 923                                         j < (len/4 - 1) ? " " : "");
 924                         printf(">");
 925                 }
 926         } else { /* anything else... hexdump */
 927                 if (len > CMD_FDT_MAX_DUMP)
 928                         printf("* 0x%p [0x%08x]", data, len);
 929                 else {
 930                         const u8 *s;
 931
 932                         printf("[");
 933                         for (j = 0, s = data; j < len; j++)
 934                                 printf("%02x%s", s[j], j < len - 1 ? " " : "");
 935                         printf("]");
 936                 }
 937         }
 938 }
 939
 940 /****************************************************************************/
 941
 942 /*
 943  * Recursively print (a portion of) the working_fdt.  The depth parameter
 944  * determines how deeply nested the fdt is printed.
 945  */
 946 static int fdt_print(const char *pathp, char *prop, int depth)
 947 {
 948         static char tabs[MAX_LEVEL+1] =
 949                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
 950                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
 951         const void *nodep;      /* property node pointer */
 952         int  nodeoffset;        /* node offset from libfdt */
 953         int  nextoffset;        /* next node offset from libfdt */
 954         uint32_t tag;           /* tag */
 955         int  len;               /* length of the property */
 956         int  level = 0;         /* keep track of nesting level */
 957         const struct fdt_property *fdt_prop;
 958
 959         nodeoffset = fdt_path_offset (working_fdt, pathp);
 960         if (nodeoffset < 0) {
 961                 /*
 962                  * Not found or something else bad happened.
 963                  */
 964                 printf ("libfdt fdt_path_offset() returned %s\n",
 965                         fdt_strerror(nodeoffset));
 966                 return 1;
 967         }
 968         /*
 969          * The user passed in a property as well as node path.
 970          * Print only the given property and then return.
 971          */
 972         if (prop) {
 973                 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
 974                 if (len == 0) {
 975                         /* no property value */
 976                         printf("%s %s\n", pathp, prop);
 977                         return 0;
 978                 } else if (nodep && len > 0) {
 979                         printf("%s = ", prop);
 980                         print_data (nodep, len);
 981                         printf("\n");
 982                         return 0;
 983                 } else {
 984                         printf ("libfdt fdt_getprop(): %s\n",
 985                                 fdt_strerror(len));
 986                         return 1;
 987                 }
 988         }
 989
 990         /*
 991          * The user passed in a node path and no property,
 992          * print the node and all subnodes.
 993          */
 994         while(level >= 0) {
 995                 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
 996                 switch(tag) {
 997                 case FDT_BEGIN_NODE:
 998                         pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
 999                         if (level <= depth) {
1000                                 if (pathp == NULL)
1001                                         pathp = "/* NULL pointer error */";
1002                                 if (*pathp == '\0')
1003                                         pathp = "/";    /* root is nameless */
1004                                 printf("%s%s {\n",
1005                                         &tabs[MAX_LEVEL - level], pathp);
1006                         }
1007                         level++;
1008                         if (level >= MAX_LEVEL) {
1009                                 printf("Nested too deep, aborting.\n");
1010                                 return 1;
1011                         }
1012                         break;
1013                 case FDT_END_NODE:
1014                         level--;
1015                         if (level <= depth)
1016                                 printf("%s};\n", &tabs[MAX_LEVEL - level]);
1017                         if (level == 0) {
1018                                 level = -1;             /* exit the loop */
1019                         }
1020                         break;
1021                 case FDT_PROP:
1022                         fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
1023                                         sizeof(*fdt_prop));
1024                         pathp    = fdt_string(working_fdt,
1025                                         fdt32_to_cpu(fdt_prop->nameoff));
1026                         len      = fdt32_to_cpu(fdt_prop->len);
1027                         nodep    = fdt_prop->data;
1028                         if (len < 0) {
1029                                 printf ("libfdt fdt_getprop(): %s\n",
1030                                         fdt_strerror(len));
1031                                 return 1;
1032                         } else if (len == 0) {
1033                                 /* the property has no value */
1034                                 if (level <= depth)
1035                                         printf("%s%s;\n",
1036                                                 &tabs[MAX_LEVEL - level],
1037                                                 pathp);
1038                         } else {
1039                                 if (level <= depth) {
1040                                         printf("%s%s = ",
1041                                                 &tabs[MAX_LEVEL - level],
1042                                                 pathp);
1043                                         print_data (nodep, len);
1044                                         printf(";\n");
1045                                 }
1046                         }
1047                         break;
1048                 case FDT_NOP:
1049                         printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
1050                         break;
1051                 case FDT_END:
1052                         return 1;
1053                 default:
1054                         if (level <= depth)
1055                                 printf("Unknown tag 0x%08X\n", tag);
1056                         return 1;
1057                 }
1058                 nodeoffset = nextoffset;
1059         }
1060         return 0;
1061 }
1062
1063 /********************************************************************/
1064 #ifdef CONFIG_SYS_LONGHELP
1065 static char fdt_help_text[] =
1066         "addr [-c]  <addr> [<length>]   - Set the [control] fdt location to <addr>\n"
1067 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1068         "fdt apply <addr>                    - Apply overlay to the DT\n"
1069 #endif
1070 #ifdef CONFIG_OF_BOARD_SETUP
1071         "fdt boardsetup                      - Do board-specific set up\n"
1072 #endif
1073 #ifdef CONFIG_OF_SYSTEM_SETUP
1074         "fdt systemsetup                     - Do system-specific set up\n"
1075 #endif
1076         "fdt move   <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1077         "fdt resize [<extrasize>]            - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1078         "fdt print  <path> [<prop>]          - Recursive print starting at <path>\n"
1079         "fdt list   <path> [<prop>]          - Print one level starting at <path>\n"
1080         "fdt get value <var> <path> <prop>   - Get <property> and store in <var>\n"
1081         "fdt get name <var> <path> <index>   - Get name of node <index> and store in <var>\n"
1082         "fdt get addr <var> <path> <prop>    - Get start address of <property> and store in <var>\n"
1083         "fdt get size <var> <path> [<prop>]  - Get size of [<property>] or num nodes and store in <var>\n"
1084         "fdt set    <path> <prop> [<val>]    - Set <property> [to <val>]\n"
1085         "fdt mknode <path> <node>            - Create a new node after <path>\n"
1086         "fdt rm     <path> [<prop>]          - Delete the node or <property>\n"
1087         "fdt header                          - Display header info\n"
1088         "fdt bootcpu <id>                    - Set boot cpuid\n"
1089         "fdt memory <addr> <size>            - Add/Update memory node\n"
1090         "fdt rsvmem print                    - Show current mem reserves\n"
1091         "fdt rsvmem add <addr> <size>        - Add a mem reserve\n"
1092         "fdt rsvmem delete <index>           - Delete a mem reserves\n"
1093         "fdt chosen [<start> <end>]          - Add/update the /chosen branch in the tree\n"
1094         "                                        <start>/<end> - initrd start/end addr\n"
1095 #if defined(CONFIG_FIT_SIGNATURE)
1096         "fdt checksign [<addr>]              - check FIT signature\n"
1097         "                                        <start> - addr of key blob\n"
1098         "                                                  default gd->fdt_blob\n"
1099 #endif
1100         "NOTE: Dereference aliases by omitting the leading '/', "
1101                 "e.g. fdt print ethernet0.";
1102 #endif
1103
1104 U_BOOT_CMD(
1105         fdt,    255,    0,      do_fdt,
1106         "flattened device tree utility commands", fdt_help_text
1107 );