common/cmd_nvedit.c

   1 /*
   2  * (C) Copyright 2000-2002
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   6  * Andreas Heppel <aheppel@sysgo.de>
   7
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24  * MA 02111-1307 USA
  25  */
  26
  27 /**************************************************************************
  28  *
  29  * Support for persistent environment data
  30  *
  31  * The "environment" is stored as a list of '\0' terminated
  32  * "name=value" strings. The end of the list is marked by a double
  33  * '\0'. New entries are always added at the end. Deleting an entry
  34  * shifts the remaining entries to the front. Replacing an entry is a
  35  * combination of deleting the old value and adding the new one.
  36  *
  37  * The environment is preceeded by a 32 bit CRC over the data part.
  38  *
  39  **************************************************************************
  40  */
  41
  42 #include <common.h>
  43 #include <command.h>
  44 #include <environment.h>
  45 #include <watchdog.h>
  46 #include <serial.h>
  47 #include <linux/stddef.h>
  48 #include <asm/byteorder.h>
  49 #if defined(CONFIG_CMD_NET)
  50 #include <net.h>
  51 #endif
  52
  53 DECLARE_GLOBAL_DATA_PTR;
  54
  55 #if !defined(CONFIG_ENV_IS_IN_NVRAM)    && \
  56     !defined(CONFIG_ENV_IS_IN_EEPROM)   && \
  57     !defined(CONFIG_ENV_IS_IN_FLASH)    && \
  58     !defined(CONFIG_ENV_IS_IN_DATAFLASH)        && \
  59     !defined(CONFIG_ENV_IS_IN_NAND)     && \
  60     !defined(CONFIG_ENV_IS_IN_ONENAND)  && \
  61     !defined(CONFIG_ENV_IS_IN_SPI_FLASH)        && \
  62     !defined(CONFIG_ENV_IS_NOWHERE)
  63 # error Define one of CONFIG_ENV_IS_IN_{NVRAM|EEPROM|FLASH|DATAFLASH|ONENAND|SPI_FLASH|NOWHERE}
  64 #endif
  65
  66 #define XMK_STR(x)      #x
  67 #define MK_STR(x)       XMK_STR(x)
  68
  69 /************************************************************************
  70 ************************************************************************/
  71
  72 /*
  73  * Table with supported baudrates (defined in config_xyz.h)
  74  */
  75 static const unsigned long baudrate_table[] = CONFIG_SYS_BAUDRATE_TABLE;
  76 #define N_BAUDRATES (sizeof(baudrate_table) / sizeof(baudrate_table[0]))
  77
  78
  79 /************************************************************************
  80  * Command interface: print one or all environment variables
  81  */
  82
  83 int do_printenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
  84 {
  85         int i, j, k, nxt;
  86         int rcode = 0;
  87
  88         if (argc == 1) {                /* Print all env variables      */
  89                 for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
  90                         for (nxt=i; env_get_char(nxt) != '\0'; ++nxt)
  91                                 ;
  92                         for (k=i; k<nxt; ++k)
  93                                 putc(env_get_char(k));
  94                         putc  ('\n');
  95
  96                         if (ctrlc()) {
  97                                 puts ("\n ** Abort\n");
  98                                 return 1;
  99                         }
 100                 }
 101
 102                 printf("\nEnvironment size: %d/%ld bytes\n",
 103                         i, (ulong)ENV_SIZE);
 104
 105                 return 0;
 106         }
 107
 108         for (i=1; i<argc; ++i) {        /* print single env variables   */
 109                 char *name = argv[i];
 110
 111                 k = -1;
 112
 113                 for (j=0; env_get_char(j) != '\0'; j=nxt+1) {
 114
 115                         for (nxt=j; env_get_char(nxt) != '\0'; ++nxt)
 116                                 ;
 117                         k = envmatch((uchar *)name, j);
 118                         if (k < 0) {
 119                                 continue;
 120                         }
 121                         puts (name);
 122                         putc ('=');
 123                         while (k < nxt)
 124                                 putc(env_get_char(k++));
 125                         putc ('\n');
 126                         break;
 127                 }
 128                 if (k < 0) {
 129                         printf ("## Error: \"%s\" not defined\n", name);
 130                         rcode ++;
 131                 }
 132         }
 133         return rcode;
 134 }
 135
 136 /************************************************************************
 137  * Set a new environment variable,
 138  * or replace or delete an existing one.
 139  *
 140  * This function will ONLY work with a in-RAM copy of the environment
 141  */
 142
 143 int _do_setenv (int flag, int argc, char *argv[])
 144 {
 145         int   i, len, oldval;
 146         int   console = -1;
 147         uchar *env, *nxt = NULL;
 148         char *name;
 149         bd_t *bd = gd->bd;
 150
 151         uchar *env_data = env_get_addr(0);
 152
 153         if (!env_data)  /* need copy in RAM */
 154                 return 1;
 155
 156         name = argv[1];
 157
 158         if (strchr(name, '=')) {
 159                 printf ("## Error: illegal character '=' in variable name \"%s\"\n", name);
 160                 return 1;
 161         }
 162
 163         /*
 164          * search if variable with this name already exists
 165          */
 166         oldval = -1;
 167         for (env=env_data; *env; env=nxt+1) {
 168                 for (nxt=env; *nxt; ++nxt)
 169                         ;
 170                 if ((oldval = envmatch((uchar *)name, env-env_data)) >= 0)
 171                         break;
 172         }
 173
 174         /*
 175          * Delete any existing definition
 176          */
 177         if (oldval >= 0) {
 178 #ifndef CONFIG_ENV_OVERWRITE
 179
 180                 /*
 181                  * Ethernet Address and serial# can be set only once,
 182                  * ver is readonly.
 183                  */
 184                 if (
 185 #ifdef CONFIG_HAS_UID
 186                 /* Allow serial# forced overwrite with 0xdeaf4add flag */
 187                     ((strcmp (name, "serial#") == 0) && (flag != 0xdeaf4add)) ||
 188 #else
 189                     (strcmp (name, "serial#") == 0) ||
 190 #endif
 191                     ((strcmp (name, "ethaddr") == 0)
 192 #if defined(CONFIG_OVERWRITE_ETHADDR_ONCE) && defined(CONFIG_ETHADDR)
 193                      && (strcmp ((char *)env_get_addr(oldval),MK_STR(CONFIG_ETHADDR)) != 0)
 194 #endif  /* CONFIG_OVERWRITE_ETHADDR_ONCE && CONFIG_ETHADDR */
 195                     ) ) {
 196                         printf ("Can't overwrite \"%s\"\n", name);
 197                         return 1;
 198                 }
 199 #endif
 200
 201                 /* Check for console redirection */
 202                 if (strcmp(name,"stdin") == 0) {
 203                         console = stdin;
 204                 } else if (strcmp(name,"stdout") == 0) {
 205                         console = stdout;
 206                 } else if (strcmp(name,"stderr") == 0) {
 207                         console = stderr;
 208                 }
 209
 210                 if (console != -1) {
 211                         if (argc < 3) {         /* Cannot delete it! */
 212                                 printf("Can't delete \"%s\"\n", name);
 213                                 return 1;
 214                         }
 215
 216 #ifdef CONFIG_CONSOLE_MUX
 217                         i = iomux_doenv(console, argv[2]);
 218                         if (i)
 219                                 return i;
 220 #else
 221                         /* Try assigning specified device */
 222                         if (console_assign (console, argv[2]) < 0)
 223                                 return 1;
 224
 225 #ifdef CONFIG_SERIAL_MULTI
 226                         if (serial_assign (argv[2]) < 0)
 227                                 return 1;
 228 #endif
 229 #endif /* CONFIG_CONSOLE_MUX */
 230                 }
 231
 232                 /*
 233                  * Switch to new baudrate if new baudrate is supported
 234                  */
 235                 if (strcmp(argv[1],"baudrate") == 0) {
 236                         int baudrate = simple_strtoul(argv[2], NULL, 10);
 237                         int i;
 238                         for (i=0; i<N_BAUDRATES; ++i) {
 239                                 if (baudrate == baudrate_table[i])
 240                                         break;
 241                         }
 242                         if (i == N_BAUDRATES) {
 243                                 printf ("## Baudrate %d bps not supported\n",
 244                                         baudrate);
 245                                 return 1;
 246                         }
 247                         printf ("## Switch baudrate to %d bps and press ENTER ...\n",
 248                                 baudrate);
 249                         udelay(50000);
 250                         gd->baudrate = baudrate;
 251 #if defined(CONFIG_PPC) || defined(CONFIG_MCF52x2)
 252                         gd->bd->bi_baudrate = baudrate;
 253 #endif
 254
 255                         serial_setbrg ();
 256                         udelay(50000);
 257                         for (;;) {
 258                                 if (getc() == '\r')
 259                                       break;
 260                         }
 261                 }
 262
 263                 if (*++nxt == '\0') {
 264                         if (env > env_data) {
 265                                 env--;
 266                         } else {
 267                                 *env = '\0';
 268                         }
 269                 } else {
 270                         for (;;) {
 271                                 *env = *nxt++;
 272                                 if ((*env == '\0') && (*nxt == '\0'))
 273                                         break;
 274                                 ++env;
 275                         }
 276                 }
 277                 *++env = '\0';
 278         }
 279
 280 #ifdef CONFIG_NET_MULTI
 281         if (strncmp(name, "eth", 3) == 0) {
 282                 char *end;
 283                 int   num = simple_strtoul(name+3, &end, 10);
 284
 285                 if (strcmp(end, "addr") == 0) {
 286                         eth_set_enetaddr(num, argv[2]);
 287                 }
 288         }
 289 #endif
 290
 291
 292         /* Delete only ? */
 293         if ((argc < 3) || argv[2] == NULL) {
 294                 env_crc_update ();
 295                 return 0;
 296         }
 297
 298         /*
 299          * Append new definition at the end
 300          */
 301         for (env=env_data; *env || *(env+1); ++env)
 302                 ;
 303         if (env > env_data)
 304                 ++env;
 305         /*
 306          * Overflow when:
 307          * "name" + "=" + "val" +"\0\0"  > ENV_SIZE - (env-env_data)
 308          */
 309         len = strlen(name) + 2;
 310         /* add '=' for first arg, ' ' for all others */
 311         for (i=2; i<argc; ++i) {
 312                 len += strlen(argv[i]) + 1;
 313         }
 314         if (len > (&env_data[ENV_SIZE]-env)) {
 315                 printf ("## Error: environment overflow, \"%s\" deleted\n", name);
 316                 return 1;
 317         }
 318         while ((*env = *name++) != '\0')
 319                 env++;
 320         for (i=2; i<argc; ++i) {
 321                 char *val = argv[i];
 322
 323                 *env = (i==2) ? '=' : ' ';
 324                 while ((*++env = *val++) != '\0')
 325                         ;
 326         }
 327
 328         /* end is marked with double '\0' */
 329         *++env = '\0';
 330
 331         /* Update CRC */
 332         env_crc_update ();
 333
 334         /*
 335          * Some variables should be updated when the corresponding
 336          * entry in the enviornment is changed
 337          */
 338
 339         if (strcmp(argv[1],"ethaddr") == 0) {
 340                 char *s = argv[2];      /* always use only one arg */
 341                 char *e;
 342                 for (i=0; i<6; ++i) {
 343                         bd->bi_enetaddr[i] = s ? simple_strtoul(s, &e, 16) : 0;
 344                         if (s) s = (*e) ? e+1 : e;
 345                 }
 346 #ifdef CONFIG_NET_MULTI
 347                 eth_set_enetaddr(0, argv[2]);
 348 #endif
 349                 return 0;
 350         }
 351
 352         if (strcmp(argv[1],"ipaddr") == 0) {
 353                 char *s = argv[2];      /* always use only one arg */
 354                 char *e;
 355                 unsigned long addr;
 356                 bd->bi_ip_addr = 0;
 357                 for (addr=0, i=0; i<4; ++i) {
 358                         ulong val = s ? simple_strtoul(s, &e, 10) : 0;
 359                         addr <<= 8;
 360                         addr  |= (val & 0xFF);
 361                         if (s) s = (*e) ? e+1 : e;
 362                 }
 363                 bd->bi_ip_addr = htonl(addr);
 364                 return 0;
 365         }
 366         if (strcmp(argv[1],"loadaddr") == 0) {
 367                 load_addr = simple_strtoul(argv[2], NULL, 16);
 368                 return 0;
 369         }
 370 #if defined(CONFIG_CMD_NET)
 371         if (strcmp(argv[1],"bootfile") == 0) {
 372                 copy_filename (BootFile, argv[2], sizeof(BootFile));
 373                 return 0;
 374         }
 375 #endif
 376
 377 #ifdef CONFIG_AMIGAONEG3SE
 378         if (strcmp(argv[1], "vga_fg_color") == 0 ||
 379             strcmp(argv[1], "vga_bg_color") == 0 ) {
 380                 extern void video_set_color(unsigned char attr);
 381                 extern unsigned char video_get_attr(void);
 382
 383                 video_set_color(video_get_attr());
 384                 return 0;
 385         }
 386 #endif  /* CONFIG_AMIGAONEG3SE */
 387
 388         return 0;
 389 }
 390
 391 int setenv (char *varname, char *varvalue)
 392 {
 393         char *argv[4] = { "setenv", varname, varvalue, NULL };
 394         if (varvalue == NULL)
 395                 return _do_setenv (0, 2, argv);
 396         else
 397                 return _do_setenv (0, 3, argv);
 398 }
 399
 400 #ifdef CONFIG_HAS_UID
 401 void forceenv (char *varname, char *varvalue)
 402 {
 403         char *argv[4] = { "forceenv", varname, varvalue, NULL };
 404         _do_setenv (0xdeaf4add, 3, argv);
 405 }
 406 #endif
 407
 408 int do_setenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 409 {
 410         if (argc < 2) {
 411                 cmd_usage(cmdtp);
 412                 return 1;
 413         }
 414
 415         return _do_setenv (flag, argc, argv);
 416 }
 417
 418 /************************************************************************
 419  * Prompt for environment variable
 420  */
 421
 422 #if defined(CONFIG_CMD_ASKENV)
 423 int do_askenv ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 424 {
 425         extern char console_buffer[CONFIG_SYS_CBSIZE];
 426         char message[CONFIG_SYS_CBSIZE];
 427         int size = CONFIG_SYS_CBSIZE - 1;
 428         int len;
 429         char *local_args[4];
 430
 431         local_args[0] = argv[0];
 432         local_args[1] = argv[1];
 433         local_args[2] = NULL;
 434         local_args[3] = NULL;
 435
 436         if (argc < 2) {
 437                 cmd_usage(cmdtp);
 438                 return 1;
 439         }
 440         /* Check the syntax */
 441         switch (argc) {
 442         case 1:
 443                 cmd_usage(cmdtp);
 444                 return 1;
 445
 446         case 2:         /* askenv envname */
 447                 sprintf (message, "Please enter '%s':", argv[1]);
 448                 break;
 449
 450         case 3:         /* askenv envname size */
 451                 sprintf (message, "Please enter '%s':", argv[1]);
 452                 size = simple_strtoul (argv[2], NULL, 10);
 453                 break;
 454
 455         default:        /* askenv envname message1 ... messagen size */
 456             {
 457                 int i;
 458                 int pos = 0;
 459
 460                 for (i = 2; i < argc - 1; i++) {
 461                         if (pos) {
 462                                 message[pos++] = ' ';
 463                         }
 464                         strcpy (message+pos, argv[i]);
 465                         pos += strlen(argv[i]);
 466                 }
 467                 message[pos] = '\0';
 468                 size = simple_strtoul (argv[argc - 1], NULL, 10);
 469             }
 470                 break;
 471         }
 472
 473         if (size >= CONFIG_SYS_CBSIZE)
 474                 size = CONFIG_SYS_CBSIZE - 1;
 475
 476         if (size <= 0)
 477                 return 1;
 478
 479         /* prompt for input */
 480         len = readline (message);
 481
 482         if (size < len)
 483                 console_buffer[size] = '\0';
 484
 485         len = 2;
 486         if (console_buffer[0] != '\0') {
 487                 local_args[2] = console_buffer;
 488                 len = 3;
 489         }
 490
 491         /* Continue calling setenv code */
 492         return _do_setenv (flag, len, local_args);
 493 }
 494 #endif
 495
 496 /************************************************************************
 497  * Look up variable from environment,
 498  * return address of storage for that variable,
 499  * or NULL if not found
 500  */
 501
 502 char *getenv (char *name)
 503 {
 504         int i, nxt;
 505
 506         WATCHDOG_RESET();
 507
 508         for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
 509                 int val;
 510
 511                 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
 512                         if (nxt >= CONFIG_ENV_SIZE) {
 513                                 return (NULL);
 514                         }
 515                 }
 516                 if ((val=envmatch((uchar *)name, i)) < 0)
 517                         continue;
 518                 return ((char *)env_get_addr(val));
 519         }
 520
 521         return (NULL);
 522 }
 523
 524 int getenv_r (char *name, char *buf, unsigned len)
 525 {
 526         int i, nxt;
 527
 528         for (i=0; env_get_char(i) != '\0'; i=nxt+1) {
 529                 int val, n;
 530
 531                 for (nxt=i; env_get_char(nxt) != '\0'; ++nxt) {
 532                         if (nxt >= CONFIG_ENV_SIZE) {
 533                                 return (-1);
 534                         }
 535                 }
 536                 if ((val=envmatch((uchar *)name, i)) < 0)
 537                         continue;
 538                 /* found; copy out */
 539                 n = 0;
 540                 while ((len > n++) && (*buf++ = env_get_char(val++)) != '\0')
 541                         ;
 542                 if (len == n)
 543                         *buf = '\0';
 544                 return (n);
 545         }
 546         return (-1);
 547 }
 548
 549 #if defined(CONFIG_CMD_ENV) && !defined(CONFIG_ENV_IS_NOWHERE)
 550
 551 int do_saveenv (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 552 {
 553         extern char * env_name_spec;
 554
 555         printf ("Saving Environment to %s...\n", env_name_spec);
 556
 557         return (saveenv() ? 1 : 0);
 558 }
 559
 560 U_BOOT_CMD(
 561         saveenv, 1, 0,  do_saveenv,
 562         "saveenv - save environment variables to persistent storage\n",
 563         NULL
 564 );
 565
 566 #endif
 567
 568
 569 /************************************************************************
 570  * Match a name / name=value pair
 571  *
 572  * s1 is either a simple 'name', or a 'name=value' pair.
 573  * i2 is the environment index for a 'name2=value2' pair.
 574  * If the names match, return the index for the value2, else NULL.
 575  */
 576
 577 int envmatch (uchar *s1, int i2)
 578 {
 579
 580         while (*s1 == env_get_char(i2++))
 581                 if (*s1++ == '=')
 582                         return(i2);
 583         if (*s1 == '\0' && env_get_char(i2-1) == '=')
 584                 return(i2);
 585         return(-1);
 586 }
 587
 588
 589 /**************************************************/
 590
 591 U_BOOT_CMD(
 592         printenv, CONFIG_SYS_MAXARGS, 1,        do_printenv,
 593         "printenv- print environment variables\n",
 594         "\n    - print values of all environment variables\n"
 595         "printenv name ...\n"
 596         "    - print value of environment variable 'name'\n"
 597 );
 598
 599 U_BOOT_CMD(
 600         setenv, CONFIG_SYS_MAXARGS, 0,  do_setenv,
 601         "setenv  - set environment variables\n",
 602         "name value ...\n"
 603         "    - set environment variable 'name' to 'value ...'\n"
 604         "setenv name\n"
 605         "    - delete environment variable 'name'\n"
 606 );
 607
 608 #if defined(CONFIG_CMD_ASKENV)
 609
 610 U_BOOT_CMD(
 611         askenv, CONFIG_SYS_MAXARGS,     1,      do_askenv,
 612         "askenv  - get environment variables from stdin\n",
 613         "name [message] [size]\n"
 614         "    - get environment variable 'name' from stdin (max 'size' chars)\n"
 615         "askenv name\n"
 616         "    - get environment variable 'name' from stdin\n"
 617         "askenv name size\n"
 618         "    - get environment variable 'name' from stdin (max 'size' chars)\n"
 619         "askenv name [message] size\n"
 620         "    - display 'message' string and get environment variable 'name'"
 621         "from stdin (max 'size' chars)\n"
 622 );
 623 #endif
 624
 625 #if defined(CONFIG_CMD_RUN)
 626 int do_run (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
 627 U_BOOT_CMD(
 628         run,    CONFIG_SYS_MAXARGS,     1,      do_run,
 629         "run     - run commands in an environment variable\n",
 630         "var [...]\n"
 631         "    - run the commands in the environment variable(s) 'var'\n"
 632 );
 633 #endif