board/trab/auto_update.c

   1 /*
   2  * (C) Copyright 2003
   3  * Gary Jennejohn, DENX Software Engineering, gj@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <command.h>
  26 #include <malloc.h>
  27 #include <image.h>
  28 #include <asm/byteorder.h>
  29 #include <usb.h>
  30
  31 #ifdef CFG_HUSH_PARSER
  32 #include <hush.h>
  33 #endif
  34
  35 #ifdef CONFIG_AUTO_UPDATE
  36
  37 #ifndef CONFIG_USB_OHCI_NEW
  38 #error "must define CONFIG_USB_OHCI"
  39 #endif
  40
  41 #ifndef CONFIG_USB_STORAGE
  42 #error "must define CONFIG_USB_STORAGE"
  43 #endif
  44
  45 #ifndef CFG_HUSH_PARSER
  46 #error "must define CFG_HUSH_PARSER"
  47 #endif
  48
  49 #if !defined(CONFIG_CMD_FAT)
  50 #error "must define CONFIG_CMD_FAT"
  51 #endif
  52
  53 /*
  54  * Check whether a USB memory stick is plugged in.
  55  * If one is found:
  56  *      1) if prepare.img ist found load it into memory. If it is
  57  *              valid then run it.
  58  *      2) if preinst.img is found load it into memory. If it is
  59  *              valid then run it. Update the EEPROM.
  60  *      3) if firmw_01.img is found load it into memory. If it is valid,
  61  *              burn it into FLASH and update the EEPROM.
  62  *      4) if kernl_01.img is found load it into memory. If it is valid,
  63  *              burn it into FLASH and update the EEPROM.
  64  *      5) if app.img is found load it into memory. If it is valid,
  65  *              burn it into FLASH and update the EEPROM.
  66  *      6) if disk.img is found load it into memory. If it is valid,
  67  *              burn it into FLASH and update the EEPROM.
  68  *      7) if postinst.img is found load it into memory. If it is
  69  *              valid then run it. Update the EEPROM.
  70  */
  71
  72 #undef AU_DEBUG
  73
  74 #undef debug
  75 #ifdef  AU_DEBUG
  76 #define debug(fmt,args...)      printf (fmt ,##args)
  77 #else
  78 #define debug(fmt,args...)
  79 #endif  /* AU_DEBUG */
  80
  81 /* possible names of files on the USB stick. */
  82 #define AU_PREPARE      "prepare.img"
  83 #define AU_PREINST      "preinst.img"
  84 #define AU_FIRMWARE     "firmw_01.img"
  85 #define AU_KERNEL       "kernl_01.img"
  86 #define AU_APP          "app.img"
  87 #define AU_DISK         "disk.img"
  88 #define AU_POSTINST     "postinst.img"
  89
  90 struct flash_layout
  91 {
  92         long start;
  93         long end;
  94 };
  95
  96 /* layout of the FLASH. ST = start address, ND = end address. */
  97 #ifndef CONFIG_FLASH_8MB                        /* 16 MB Flash, 32 MB RAM */
  98 #define AU_FL_FIRMWARE_ST       0x00000000
  99 #define AU_FL_FIRMWARE_ND       0x0009FFFF
 100 #define AU_FL_VFD_ST            0x000A0000
 101 #define AU_FL_VFD_ND            0x000BFFFF
 102 #define AU_FL_KERNEL_ST         0x000C0000
 103 #define AU_FL_KERNEL_ND         0x001BFFFF
 104 #define AU_FL_APP_ST            0x001C0000
 105 #define AU_FL_APP_ND            0x005BFFFF
 106 #define AU_FL_DISK_ST           0x005C0000
 107 #define AU_FL_DISK_ND           0x00FFFFFF
 108 #else                                           /*  8 MB Flash, 32 MB RAM */
 109 #define AU_FL_FIRMWARE_ST       0x00000000
 110 #define AU_FL_FIRMWARE_ND       0x0005FFFF
 111 #define AU_FL_KERNEL_ST         0x00060000
 112 #define AU_FL_KERNEL_ND         0x0013FFFF
 113 #define AU_FL_APP_ST            0x00140000
 114 #define AU_FL_APP_ND            0x0067FFFF
 115 #define AU_FL_DISK_ST           0x00680000
 116 #define AU_FL_DISK_ND           0x007DFFFF
 117 #define AU_FL_VFD_ST            0x007E0000
 118 #define AU_FL_VFD_ND            0x007FFFFF
 119 #endif  /* CONFIG_FLASH_8MB */
 120
 121 /* a structure with the offsets to values in the EEPROM */
 122 struct eeprom_layout
 123 {
 124         int time;
 125         int size;
 126         int dcrc;
 127 };
 128
 129 /* layout of the EEPROM - offset from the start. All entries are 32 bit. */
 130 #define AU_EEPROM_TIME_PREINST  64
 131 #define AU_EEPROM_SIZE_PREINST  68
 132 #define AU_EEPROM_DCRC_PREINST  72
 133 #define AU_EEPROM_TIME_FIRMWARE 76
 134 #define AU_EEPROM_SIZE_FIRMWARE 80
 135 #define AU_EEPROM_DCRC_FIRMWARE 84
 136 #define AU_EEPROM_TIME_KERNEL   88
 137 #define AU_EEPROM_SIZE_KERNEL   92
 138 #define AU_EEPROM_DCRC_KERNEL   96
 139 #define AU_EEPROM_TIME_APP      100
 140 #define AU_EEPROM_SIZE_APP      104
 141 #define AU_EEPROM_DCRC_APP      108
 142 #define AU_EEPROM_TIME_DISK     112
 143 #define AU_EEPROM_SIZE_DISK     116
 144 #define AU_EEPROM_DCRC_DISK     120
 145 #define AU_EEPROM_TIME_POSTINST 124
 146 #define AU_EEPROM_SIZE_POSTINST 128
 147 #define AU_EEPROM_DCRC_POSTINST 132
 148
 149 static int au_usb_stor_curr_dev; /* current device */
 150
 151 /* index of each file in the following arrays */
 152 #define IDX_PREPARE     0
 153 #define IDX_PREINST     1
 154 #define IDX_FIRMWARE    2
 155 #define IDX_KERNEL      3
 156 #define IDX_APP         4
 157 #define IDX_DISK        5
 158 #define IDX_POSTINST    6
 159 /* max. number of files which could interest us */
 160 #define AU_MAXFILES 7
 161 /* pointers to file names */
 162 char *aufile[AU_MAXFILES];
 163 /* sizes of flash areas for each file */
 164 long ausize[AU_MAXFILES];
 165 /* offsets into the EEEPROM */
 166 struct eeprom_layout auee_off[AU_MAXFILES] = { \
 167         {0}, \
 168         {AU_EEPROM_TIME_PREINST, AU_EEPROM_SIZE_PREINST, AU_EEPROM_DCRC_PREINST,}, \
 169         {AU_EEPROM_TIME_FIRMWARE, AU_EEPROM_SIZE_FIRMWARE, AU_EEPROM_DCRC_FIRMWARE,}, \
 170         {AU_EEPROM_TIME_KERNEL, AU_EEPROM_SIZE_KERNEL, AU_EEPROM_DCRC_KERNEL,}, \
 171         {AU_EEPROM_TIME_APP, AU_EEPROM_SIZE_APP, AU_EEPROM_DCRC_APP,}, \
 172         {AU_EEPROM_TIME_DISK, AU_EEPROM_SIZE_DISK, AU_EEPROM_DCRC_DISK,}, \
 173         {AU_EEPROM_TIME_POSTINST, AU_EEPROM_SIZE_POSTINST, AU_EEPROM_DCRC_POSTINST,} \
 174         };
 175 /* array of flash areas start and end addresses */
 176 struct flash_layout aufl_layout[AU_MAXFILES - 3] = { \
 177         {AU_FL_FIRMWARE_ST, AU_FL_FIRMWARE_ND,}, \
 178         {AU_FL_KERNEL_ST, AU_FL_KERNEL_ND,}, \
 179         {AU_FL_APP_ST, AU_FL_APP_ND,}, \
 180         {AU_FL_DISK_ST, AU_FL_DISK_ND,}, \
 181 };
 182 /* convert the index into aufile[] to an index into aufl_layout[] */
 183 #define FIDX_TO_LIDX(idx) ((idx) - 2)
 184
 185 /* where to load files into memory */
 186 #define LOAD_ADDR ((unsigned char *)0x0C100000)
 187 /* the app is the largest image */
 188 #define MAX_LOADSZ ausize[IDX_APP]
 189
 190 /* externals */
 191 extern int fat_register_device(block_dev_desc_t *, int);
 192 extern int file_fat_detectfs(void);
 193 extern long file_fat_read(const char *, void *, unsigned long);
 194 extern int i2c_read (unsigned char, unsigned int, int , unsigned char* , int);
 195 extern int i2c_write (uchar, uint, int , uchar* , int);
 196 #ifdef CONFIG_VFD
 197 extern int trab_vfd (ulong);
 198 extern int transfer_pic(unsigned char, unsigned char *, int, int);
 199 #endif
 200 extern int flash_sect_erase(ulong, ulong);
 201 extern int flash_sect_protect (int, ulong, ulong);
 202 extern int flash_write (char *, ulong, ulong);
 203 /* change char* to void* to shutup the compiler */
 204 extern int i2c_write_multiple (uchar, uint, int, void *, int);
 205 extern int i2c_read_multiple (uchar, uint, int, void *, int);
 206 extern int u_boot_hush_start(void);
 207
 208 int
 209 au_check_cksum_valid(int idx, long nbytes)
 210 {
 211         image_header_t *hdr;
 212
 213         hdr = (image_header_t *)LOAD_ADDR;
 214 #if defined(CONFIG_FIT)
 215         if (gen_image_get_format ((void *)hdr) != IMAGE_FORMAT_LEGACY) {
 216                 puts ("Non legacy image format not supported\n");
 217                 return -1;
 218         }
 219 #endif
 220
 221         if (nbytes != image_get_image_size (hdr))
 222         {
 223                 printf ("Image %s bad total SIZE\n", aufile[idx]);
 224                 return -1;
 225         }
 226         /* check the data CRC */
 227         if (!image_check_dcrc (hdr)) {
 228         {
 229                 printf ("Image %s bad data checksum\n", aufile[idx]);
 230                 return -1;
 231         }
 232         return 0;
 233 }
 234
 235 int
 236 au_check_header_valid(int idx, long nbytes)
 237 {
 238         image_header_t *hdr;
 239         unsigned long checksum;
 240         unsigned char buf[4];
 241
 242         hdr = (image_header_t *)LOAD_ADDR;
 243 #if defined(CONFIG_FIT)
 244         if (gen_image_get_format ((void *)hdr) != IMAGE_FORMAT_LEGACY) {
 245                 puts ("Non legacy image format not supported\n");
 246                 return -1;
 247         }
 248 #endif
 249
 250         /* check the easy ones first */
 251 #undef CHECK_VALID_DEBUG
 252 #ifdef CHECK_VALID_DEBUG
 253         printf("magic %#x %#x ", image_get_magic (hdr), IH_MAGIC);
 254         printf("arch %#x %#x ", image_get_arch (hdr), IH_ARCH_ARM);
 255         printf("size %#x %#lx ", image_get_data_size (hdr), nbytes);
 256         printf("type %#x %#x ", image_get_type (hdr), IH_TYPE_KERNEL);
 257 #endif
 258         if (nbytes < image_get_header_size ())
 259         {
 260                 printf ("Image %s bad header SIZE\n", aufile[idx]);
 261                 return -1;
 262         }
 263         if (!image_check_magic (hdr) || !image_check_arch (hdr, IH_ARCH_ARM))
 264         {
 265                 printf ("Image %s bad MAGIC or ARCH\n", aufile[idx]);
 266                 return -1;
 267         }
 268         /* check the hdr CRC */
 269         if (!image_check_hcrc (hdr)) {
 270                 printf ("Image %s bad header checksum\n", aufile[idx]);
 271                 return -1;
 272         }
 273         /* check the type - could do this all in one gigantic if() */
 274         if ((idx == IDX_FIRMWARE) && !image_check_type (hdr, IH_TYPE_FIRMWARE)) {
 275                 printf ("Image %s wrong type\n", aufile[idx]);
 276                 return -1;
 277         }
 278         if ((idx == IDX_KERNEL) && !image_check_type (hdr, IH_TYPE_KERNEL)) {
 279                 printf ("Image %s wrong type\n", aufile[idx]);
 280                 return -1;
 281         }
 282         if ((idx == IDX_DISK) && !image_check_type (hdr, IH_TYPE_FILESYSTEM)) {
 283                 printf ("Image %s wrong type\n", aufile[idx]);
 284                 return -1;
 285         }
 286         if ((idx == IDX_APP) && !image_check_type (hdr, IH_TYPE_RAMDISK)
 287             && !image_check_type (hdr, FILESYSTEM)) {
 288                 printf ("Image %s wrong type\n", aufile[idx]);
 289                 return -1;
 290         }
 291         if ((idx == IDX_PREPARE || idx == IDX_PREINST || idx == IDX_POSTINST)
 292                 && !image_check_type (hdr, IH_TYPE_SCRIPT))
 293         {
 294                 printf ("Image %s wrong type\n", aufile[idx]);
 295                 return -1;
 296         }
 297         /* special case for prepare.img */
 298         if (idx == IDX_PREPARE)
 299                 return 0;
 300         /* recycle checksum */
 301         checksum = image_get_data_size (hdr);
 302         /* for kernel and app the image header must also fit into flash */
 303         if ((idx != IDX_DISK) && (idx != IDX_FIRMWARE))
 304                 checksum += image_get_header_size ();
 305         /* check the size does not exceed space in flash. HUSH scripts */
 306         /* all have ausize[] set to 0 */
 307         if ((ausize[idx] != 0) && (ausize[idx] < checksum)) {
 308                 printf ("Image %s is bigger than FLASH\n", aufile[idx]);
 309                 return -1;
 310         }
 311         /* check the time stamp from the EEPROM */
 312         /* read it in */
 313         i2c_read_multiple(0x54, auee_off[idx].time, 1, buf, sizeof(buf));
 314 #ifdef CHECK_VALID_DEBUG
 315         printf ("buf[0] %#x buf[1] %#x buf[2] %#x buf[3] %#x "
 316                 "as int %#x time %#x\n",
 317                 buf[0], buf[1], buf[2], buf[3],
 318                 *((unsigned int *)buf), image_get_time (hdr));
 319 #endif
 320         /* check it */
 321         if (*((unsigned int *)buf) >= image_get_time (hdr)) {
 322                 printf ("Image %s is too old\n", aufile[idx]);
 323                 return -1;
 324         }
 325
 326         return 0;
 327 }
 328
 329 /* power control defines */
 330 #define CPLD_VFD_BK ((volatile char *)0x04038002)
 331 #define POWER_OFF (1 << 1)
 332
 333 int
 334 au_do_update(int idx, long sz)
 335 {
 336         image_header_t *hdr;
 337         char *addr;
 338         long start, end;
 339         int off, rc;
 340         uint nbytes;
 341
 342         hdr = (image_header_t *)LOAD_ADDR;
 343 #if defined(CONFIG_FIT)
 344         if (gen_image_get_format ((void *)hdr) != IMAGE_FORMAT_LEGACY) {
 345                 puts ("Non legacy image format not supported\n");
 346                 return -1;
 347         }
 348 #endif
 349
 350         /* disable the power switch */
 351         *CPLD_VFD_BK |= POWER_OFF;
 352
 353         /* execute a script */
 354         if (image_check_type (hdr, IH_TYPE_SCRIPT)) {
 355                 addr = (char *)((char *)hdr + image_get_header_size ());
 356                 /* stick a NULL at the end of the script, otherwise */
 357                 /* parse_string_outer() runs off the end. */
 358                 addr[image_get_data_size (hdr)] = 0;
 359                 addr += 8;
 360                 parse_string_outer(addr, FLAG_PARSE_SEMICOLON);
 361                 return 0;
 362         }
 363
 364         start = aufl_layout[FIDX_TO_LIDX(idx)].start;
 365         end = aufl_layout[FIDX_TO_LIDX(idx)].end;
 366
 367         /* unprotect the address range */
 368         /* this assumes that ONLY the firmware is protected! */
 369         if (idx == IDX_FIRMWARE) {
 370 #undef AU_UPDATE_TEST
 371 #ifdef AU_UPDATE_TEST
 372                 /* erase it where Linux goes */
 373                 start = aufl_layout[1].start;
 374                 end = aufl_layout[1].end;
 375 #endif
 376                 flash_sect_protect(0, start, end);
 377         }
 378
 379         /*
 380          * erase the address range.
 381          */
 382         debug ("flash_sect_erase(%lx, %lx);\n", start, end);
 383         flash_sect_erase(start, end);
 384         wait_ms(100);
 385         /* strip the header - except for the kernel and ramdisk */
 386         if (image_check_type (hdr, IH_TYPE_KERNEL) ||
 387                         image_check_type (hdr, IH_TYPE_RAMDISK)) {
 388                 addr = (char *)hdr;
 389                 off = image_get_header_size ();
 390                 nbytes = image_get_image_size (hdr);
 391         } else {
 392                 addr = (char *)((char *)hdr + image_get_header_size ());
 393 #ifdef AU_UPDATE_TEST
 394                 /* copy it to where Linux goes */
 395                 if (idx == IDX_FIRMWARE)
 396                         start = aufl_layout[1].start;
 397 #endif
 398                 off = 0;
 399                 nbytes = image_get_data_size (hdr);
 400         }
 401
 402         /* copy the data from RAM to FLASH */
 403         debug ("flash_write(%p, %lx %x)\n", addr, start, nbytes);
 404         rc = flash_write(addr, start, nbytes);
 405         if (rc != 0) {
 406                 printf("Flashing failed due to error %d\n", rc);
 407                 return -1;
 408         }
 409
 410         /* check the dcrc of the copy */
 411         if (crc32 (0, (uchar *)(start + off), image_get_data_size (hdr)) !=
 412             image_get_dcrc (hdr)) {
 413                 printf ("Image %s Bad Data Checksum After COPY\n", aufile[idx]);
 414                 return -1;
 415         }
 416
 417         /* protect the address range */
 418         /* this assumes that ONLY the firmware is protected! */
 419         if (idx == IDX_FIRMWARE)
 420                 flash_sect_protect(1, start, end);
 421         return 0;
 422 }
 423
 424 int
 425 au_update_eeprom(int idx)
 426 {
 427         image_header_t *hdr;
 428         int off;
 429         uint32_t val;
 430
 431         /* special case for prepare.img */
 432         if (idx == IDX_PREPARE) {
 433                 /* enable the power switch */
 434                 *CPLD_VFD_BK &= ~POWER_OFF;
 435                 return 0;
 436         }
 437
 438         hdr = (image_header_t *)LOAD_ADDR;
 439 #if defined(CONFIG_FIT)
 440         if (gen_image_get_format ((void *)hdr) != IMAGE_FORMAT_LEGACY) {
 441                 puts ("Non legacy image format not supported\n");
 442                 return -1;
 443         }
 444 #endif
 445
 446         /* write the time field into EEPROM */
 447         off = auee_off[idx].time;
 448         val = image_get_time (hdr);
 449         i2c_write_multiple(0x54, off, 1, &val, sizeof(val));
 450         /* write the size field into EEPROM */
 451         off = auee_off[idx].size;
 452         val = image_get_data_size (hdr);
 453         i2c_write_multiple(0x54, off, 1, &val, sizeof(val));
 454         /* write the dcrc field into EEPROM */
 455         off = auee_off[idx].dcrc;
 456         val = image_get_dcrc (hdr);
 457         i2c_write_multiple(0x54, off, 1, &val, sizeof(val));
 458         /* enable the power switch */
 459         *CPLD_VFD_BK &= ~POWER_OFF;
 460         return 0;
 461 }
 462
 463 /*
 464  * this is called from board_init() after the hardware has been set up
 465  * and is usable. That seems like a good time to do this.
 466  * Right now the return value is ignored.
 467  */
 468 int
 469 do_auto_update(void)
 470 {
 471         block_dev_desc_t *stor_dev;
 472         long sz;
 473         int i, res = 0, bitmap_first, cnt, old_ctrlc, got_ctrlc;
 474         char *env;
 475         long start, end;
 476
 477 #undef ERASE_EEPROM
 478 #ifdef ERASE_EEPROM
 479         int arr[18];
 480         memset(arr, 0, sizeof(arr));
 481         i2c_write_multiple(0x54, 64, 1, arr, sizeof(arr));
 482 #endif
 483         au_usb_stor_curr_dev = -1;
 484         /* start USB */
 485         if (usb_stop() < 0) {
 486                 debug ("usb_stop failed\n");
 487                 return -1;
 488         }
 489         if (usb_init() < 0) {
 490                 debug ("usb_init failed\n");
 491                 return -1;
 492         }
 493         /*
 494          * check whether a storage device is attached (assume that it's
 495          * a USB memory stick, since nothing else should be attached).
 496          */
 497         au_usb_stor_curr_dev = usb_stor_scan(0);
 498         if (au_usb_stor_curr_dev == -1) {
 499                 debug ("No device found. Not initialized?\n");
 500                 res = -1;
 501                 goto xit;
 502         }
 503         /* check whether it has a partition table */
 504         stor_dev = get_dev("usb", 0);
 505         if (stor_dev == NULL) {
 506                 debug ("uknown device type\n");
 507                 res = -1;
 508                 goto xit;
 509         }
 510         if (fat_register_device(stor_dev, 1) != 0) {
 511                 debug ("Unable to use USB %d:%d for fatls\n",
 512                         au_usb_stor_curr_dev, 1);
 513                 res = -1;
 514                 goto xit;
 515         }
 516         if (file_fat_detectfs() != 0) {
 517                 debug ("file_fat_detectfs failed\n");
 518         }
 519
 520         /* initialize the array of file names */
 521         memset(aufile, 0, sizeof(aufile));
 522         aufile[IDX_PREPARE] = AU_PREPARE;
 523         aufile[IDX_PREINST] = AU_PREINST;
 524         aufile[IDX_FIRMWARE] = AU_FIRMWARE;
 525         aufile[IDX_KERNEL] = AU_KERNEL;
 526         aufile[IDX_APP] = AU_APP;
 527         aufile[IDX_DISK] = AU_DISK;
 528         aufile[IDX_POSTINST] = AU_POSTINST;
 529         /* initialize the array of flash sizes */
 530         memset(ausize, 0, sizeof(ausize));
 531         ausize[IDX_FIRMWARE] = (AU_FL_FIRMWARE_ND + 1) - AU_FL_FIRMWARE_ST;
 532         ausize[IDX_KERNEL] = (AU_FL_KERNEL_ND + 1) - AU_FL_KERNEL_ST;
 533         ausize[IDX_APP] = (AU_FL_APP_ND + 1) - AU_FL_APP_ST;
 534         ausize[IDX_DISK] = (AU_FL_DISK_ND + 1) - AU_FL_DISK_ST;
 535         /*
 536          * now check whether start and end are defined using environment
 537          * variables.
 538          */
 539         start = -1;
 540         end = 0;
 541         env = getenv("firmware_st");
 542         if (env != NULL)
 543                 start = simple_strtoul(env, NULL, 16);
 544         env = getenv("firmware_nd");
 545         if (env != NULL)
 546                 end = simple_strtoul(env, NULL, 16);
 547         if (start >= 0 && end && end > start) {
 548                 ausize[IDX_FIRMWARE] = (end + 1) - start;
 549                 aufl_layout[0].start = start;
 550                 aufl_layout[0].end = end;
 551         }
 552         start = -1;
 553         end = 0;
 554         env = getenv("kernel_st");
 555         if (env != NULL)
 556                 start = simple_strtoul(env, NULL, 16);
 557         env = getenv("kernel_nd");
 558         if (env != NULL)
 559                 end = simple_strtoul(env, NULL, 16);
 560         if (start >= 0 && end && end > start) {
 561                 ausize[IDX_KERNEL] = (end + 1) - start;
 562                 aufl_layout[1].start = start;
 563                 aufl_layout[1].end = end;
 564         }
 565         start = -1;
 566         end = 0;
 567         env = getenv("app_st");
 568         if (env != NULL)
 569                 start = simple_strtoul(env, NULL, 16);
 570         env = getenv("app_nd");
 571         if (env != NULL)
 572                 end = simple_strtoul(env, NULL, 16);
 573         if (start >= 0 && end && end > start) {
 574                 ausize[IDX_APP] = (end + 1) - start;
 575                 aufl_layout[2].start = start;
 576                 aufl_layout[2].end = end;
 577         }
 578         start = -1;
 579         end = 0;
 580         env = getenv("disk_st");
 581         if (env != NULL)
 582                 start = simple_strtoul(env, NULL, 16);
 583         env = getenv("disk_nd");
 584         if (env != NULL)
 585                 end = simple_strtoul(env, NULL, 16);
 586         if (start >= 0 && end && end > start) {
 587                 ausize[IDX_DISK] = (end + 1) - start;
 588                 aufl_layout[3].start = start;
 589                 aufl_layout[3].end = end;
 590         }
 591         /* make certain that HUSH is runnable */
 592         u_boot_hush_start();
 593         /* make sure that we see CTRL-C and save the old state */
 594         old_ctrlc = disable_ctrlc(0);
 595
 596         bitmap_first = 0;
 597         /* just loop thru all the possible files */
 598         for (i = 0; i < AU_MAXFILES; i++) {
 599                 /* just read the header */
 600                 sz = file_fat_read(aufile[i], LOAD_ADDR, image_get_header_size ());
 601                 debug ("read %s sz %ld hdr %d\n",
 602                         aufile[i], sz, image_get_header_size ());
 603                 if (sz <= 0 || sz < image_get_header_size ()) {
 604                         debug ("%s not found\n", aufile[i]);
 605                         continue;
 606                 }
 607                 if (au_check_header_valid(i, sz) < 0) {
 608                         debug ("%s header not valid\n", aufile[i]);
 609                         continue;
 610                 }
 611                 sz = file_fat_read(aufile[i], LOAD_ADDR, MAX_LOADSZ);
 612                 debug ("read %s sz %ld hdr %d\n",
 613                         aufile[i], sz, image_get_header_size ());
 614                 if (sz <= 0 || sz <= image_get_header_size ()) {
 615                         debug ("%s not found\n", aufile[i]);
 616                         continue;
 617                 }
 618                 if (au_check_cksum_valid(i, sz) < 0) {
 619                         debug ("%s checksum not valid\n", aufile[i]);
 620                         continue;
 621                 }
 622 #ifdef CONFIG_VFD
 623                 /* now that we have a valid file we can display the */
 624                 /* bitmap. */
 625                 if (bitmap_first == 0) {
 626                         env = getenv("bitmap2");
 627                         if (env == NULL) {
 628                                 trab_vfd(0);
 629                         } else {
 630                                 /* not so simple - bitmap2 is supposed to */
 631                                 /* contain the address of the bitmap */
 632                                 env = (char *)simple_strtoul(env, NULL, 16);
 633 /* NOTE: these are taken from vfd_logo.h. If that file changes then */
 634 /* these defines MUST also be updated! These may be wrong for bitmap2. */
 635 #define VFD_LOGO_WIDTH 112
 636 #define VFD_LOGO_HEIGHT 72
 637                                 /* must call transfer_pic directly */
 638                                 transfer_pic(3, (unsigned char *)env,
 639                                              VFD_LOGO_HEIGHT, VFD_LOGO_WIDTH);
 640                         }
 641                         bitmap_first = 1;
 642                 }
 643 #endif
 644                 /* this is really not a good idea, but it's what the */
 645                 /* customer wants. */
 646                 cnt = 0;
 647                 got_ctrlc = 0;
 648                 do {
 649                         res = au_do_update(i, sz);
 650                         /* let the user break out of the loop */
 651                         if (ctrlc() || had_ctrlc()) {
 652                                 clear_ctrlc();
 653                                 if (res < 0)
 654                                         got_ctrlc = 1;
 655                                 break;
 656                         }
 657                         cnt++;
 658 #ifdef AU_TEST_ONLY
 659                 } while (res < 0 && cnt < 3);
 660                 if (cnt < 3)
 661 #else
 662                 } while (res < 0);
 663 #endif
 664                 /*
 665                  * it doesn't make sense to update the EEPROM if the
 666                  * update was interrupted by the user due to errors.
 667                  */
 668                 if (got_ctrlc == 0)
 669                         au_update_eeprom(i);
 670                 else
 671                         /* enable the power switch */
 672                         *CPLD_VFD_BK &= ~POWER_OFF;
 673         }
 674         /* restore the old state */
 675         disable_ctrlc(old_ctrlc);
 676 xit:
 677         usb_stop();
 678         return res;
 679 }
 680 #endif /* CONFIG_AUTO_UPDATE */