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         unsigned long checksum;
 213
 214         hdr = (image_header_t *)LOAD_ADDR;
 215
 216         if (nbytes != (sizeof(*hdr) + ntohl(hdr->ih_size)))
 217         {
 218                 printf ("Image %s bad total SIZE\n", aufile[idx]);
 219                 return -1;
 220         }
 221         /* check the data CRC */
 222         checksum = ntohl(hdr->ih_dcrc);
 223
 224         if (crc32 (0, (uchar *)(LOAD_ADDR + sizeof(*hdr)), ntohl(hdr->ih_size))
 225                 != checksum)
 226         {
 227                 printf ("Image %s bad data checksum\n", aufile[idx]);
 228                 return -1;
 229         }
 230         return 0;
 231 }
 232
 233 int
 234 au_check_header_valid(int idx, long nbytes)
 235 {
 236         image_header_t *hdr;
 237         unsigned long checksum;
 238         unsigned char buf[4];
 239
 240         hdr = (image_header_t *)LOAD_ADDR;
 241         /* check the easy ones first */
 242 #undef CHECK_VALID_DEBUG
 243 #ifdef CHECK_VALID_DEBUG
 244         printf("magic %#x %#x ", ntohl(hdr->ih_magic), IH_MAGIC);
 245         printf("arch %#x %#x ", hdr->ih_arch, IH_CPU_ARM);
 246         printf("size %#x %#lx ", ntohl(hdr->ih_size), nbytes);
 247         printf("type %#x %#x ", hdr->ih_type, IH_TYPE_KERNEL);
 248 #endif
 249         if (nbytes < sizeof(*hdr))
 250         {
 251                 printf ("Image %s bad header SIZE\n", aufile[idx]);
 252                 return -1;
 253         }
 254         if (ntohl(hdr->ih_magic) != IH_MAGIC || hdr->ih_arch != IH_CPU_ARM)
 255         {
 256                 printf ("Image %s bad MAGIC or ARCH\n", aufile[idx]);
 257                 return -1;
 258         }
 259         /* check the hdr CRC */
 260         checksum = ntohl(hdr->ih_hcrc);
 261         hdr->ih_hcrc = 0;
 262
 263         if (crc32 (0, (uchar *)hdr, sizeof(*hdr)) != checksum) {
 264                 printf ("Image %s bad header checksum\n", aufile[idx]);
 265                 return -1;
 266         }
 267         hdr->ih_hcrc = htonl(checksum);
 268         /* check the type - could do this all in one gigantic if() */
 269         if ((idx == IDX_FIRMWARE) && (hdr->ih_type != IH_TYPE_FIRMWARE)) {
 270                 printf ("Image %s wrong type\n", aufile[idx]);
 271                 return -1;
 272         }
 273         if ((idx == IDX_KERNEL) && (hdr->ih_type != IH_TYPE_KERNEL)) {
 274                 printf ("Image %s wrong type\n", aufile[idx]);
 275                 return -1;
 276         }
 277         if ((idx == IDX_DISK) && (hdr->ih_type != IH_TYPE_FILESYSTEM)) {
 278                 printf ("Image %s wrong type\n", aufile[idx]);
 279                 return -1;
 280         }
 281         if ((idx == IDX_APP) && (hdr->ih_type != IH_TYPE_RAMDISK)
 282             && (hdr->ih_type != IH_TYPE_FILESYSTEM)) {
 283                 printf ("Image %s wrong type\n", aufile[idx]);
 284                 return -1;
 285         }
 286         if ((idx == IDX_PREPARE || idx == IDX_PREINST || idx == IDX_POSTINST)
 287                 && (hdr->ih_type != IH_TYPE_SCRIPT))
 288         {
 289                 printf ("Image %s wrong type\n", aufile[idx]);
 290                 return -1;
 291         }
 292         /* special case for prepare.img */
 293         if (idx == IDX_PREPARE)
 294                 return 0;
 295         /* recycle checksum */
 296         checksum = ntohl(hdr->ih_size);
 297         /* for kernel and app the image header must also fit into flash */
 298         if ((idx != IDX_DISK) && (idx != IDX_FIRMWARE))
 299                 checksum += sizeof(*hdr);
 300         /* check the size does not exceed space in flash. HUSH scripts */
 301         /* all have ausize[] set to 0 */
 302         if ((ausize[idx] != 0) && (ausize[idx] < checksum)) {
 303                 printf ("Image %s is bigger than FLASH\n", aufile[idx]);
 304                 return -1;
 305         }
 306         /* check the time stamp from the EEPROM */
 307         /* read it in */
 308         i2c_read_multiple(0x54, auee_off[idx].time, 1, buf, sizeof(buf));
 309 #ifdef CHECK_VALID_DEBUG
 310         printf ("buf[0] %#x buf[1] %#x buf[2] %#x buf[3] %#x "
 311                 "as int %#x time %#x\n",
 312                 buf[0], buf[1], buf[2], buf[3],
 313                 *((unsigned int *)buf), ntohl(hdr->ih_time));
 314 #endif
 315         /* check it */
 316         if (*((unsigned int *)buf) >= ntohl(hdr->ih_time)) {
 317                 printf ("Image %s is too old\n", aufile[idx]);
 318                 return -1;
 319         }
 320
 321         return 0;
 322 }
 323
 324 /* power control defines */
 325 #define CPLD_VFD_BK ((volatile char *)0x04038002)
 326 #define POWER_OFF (1 << 1)
 327
 328 int
 329 au_do_update(int idx, long sz)
 330 {
 331         image_header_t *hdr;
 332         char *addr;
 333         long start, end;
 334         int off, rc;
 335         uint nbytes;
 336
 337         hdr = (image_header_t *)LOAD_ADDR;
 338
 339         /* disable the power switch */
 340         *CPLD_VFD_BK |= POWER_OFF;
 341
 342         /* execute a script */
 343         if (hdr->ih_type == IH_TYPE_SCRIPT) {
 344                 addr = (char *)((char *)hdr + sizeof(*hdr));
 345                 /* stick a NULL at the end of the script, otherwise */
 346                 /* parse_string_outer() runs off the end. */
 347                 addr[ntohl(hdr->ih_size)] = 0;
 348                 addr += 8;
 349                 parse_string_outer(addr, FLAG_PARSE_SEMICOLON);
 350                 return 0;
 351         }
 352
 353         start = aufl_layout[FIDX_TO_LIDX(idx)].start;
 354         end = aufl_layout[FIDX_TO_LIDX(idx)].end;
 355
 356         /* unprotect the address range */
 357         /* this assumes that ONLY the firmware is protected! */
 358         if (idx == IDX_FIRMWARE) {
 359 #undef AU_UPDATE_TEST
 360 #ifdef AU_UPDATE_TEST
 361                 /* erase it where Linux goes */
 362                 start = aufl_layout[1].start;
 363                 end = aufl_layout[1].end;
 364 #endif
 365                 flash_sect_protect(0, start, end);
 366         }
 367
 368         /*
 369          * erase the address range.
 370          */
 371         debug ("flash_sect_erase(%lx, %lx);\n", start, end);
 372         flash_sect_erase(start, end);
 373         wait_ms(100);
 374         /* strip the header - except for the kernel and ramdisk */
 375         if (hdr->ih_type == IH_TYPE_KERNEL || hdr->ih_type == IH_TYPE_RAMDISK) {
 376                 addr = (char *)hdr;
 377                 off = sizeof(*hdr);
 378                 nbytes = sizeof(*hdr) + ntohl(hdr->ih_size);
 379         } else {
 380                 addr = (char *)((char *)hdr + sizeof(*hdr));
 381 #ifdef AU_UPDATE_TEST
 382                 /* copy it to where Linux goes */
 383                 if (idx == IDX_FIRMWARE)
 384                         start = aufl_layout[1].start;
 385 #endif
 386                 off = 0;
 387                 nbytes = ntohl(hdr->ih_size);
 388         }
 389
 390         /* copy the data from RAM to FLASH */
 391         debug ("flash_write(%p, %lx %x)\n", addr, start, nbytes);
 392         rc = flash_write(addr, start, nbytes);
 393         if (rc != 0) {
 394                 printf("Flashing failed due to error %d\n", rc);
 395                 return -1;
 396         }
 397
 398         /* check the dcrc of the copy */
 399         if (crc32 (0, (uchar *)(start + off), ntohl(hdr->ih_size)) != ntohl(hdr->ih_dcrc)) {
 400                 printf ("Image %s Bad Data Checksum After COPY\n", aufile[idx]);
 401                 return -1;
 402         }
 403
 404         /* protect the address range */
 405         /* this assumes that ONLY the firmware is protected! */
 406         if (idx == IDX_FIRMWARE)
 407                 flash_sect_protect(1, start, end);
 408         return 0;
 409 }
 410
 411 int
 412 au_update_eeprom(int idx)
 413 {
 414         image_header_t *hdr;
 415         int off;
 416         uint32_t val;
 417
 418         /* special case for prepare.img */
 419         if (idx == IDX_PREPARE) {
 420                 /* enable the power switch */
 421                 *CPLD_VFD_BK &= ~POWER_OFF;
 422                 return 0;
 423         }
 424
 425         hdr = (image_header_t *)LOAD_ADDR;
 426         /* write the time field into EEPROM */
 427         off = auee_off[idx].time;
 428         val = ntohl(hdr->ih_time);
 429         i2c_write_multiple(0x54, off, 1, &val, sizeof(val));
 430         /* write the size field into EEPROM */
 431         off = auee_off[idx].size;
 432         val = ntohl(hdr->ih_size);
 433         i2c_write_multiple(0x54, off, 1, &val, sizeof(val));
 434         /* write the dcrc field into EEPROM */
 435         off = auee_off[idx].dcrc;
 436         val = ntohl(hdr->ih_dcrc);
 437         i2c_write_multiple(0x54, off, 1, &val, sizeof(val));
 438         /* enable the power switch */
 439         *CPLD_VFD_BK &= ~POWER_OFF;
 440         return 0;
 441 }
 442
 443 /*
 444  * this is called from board_init() after the hardware has been set up
 445  * and is usable. That seems like a good time to do this.
 446  * Right now the return value is ignored.
 447  */
 448 int
 449 do_auto_update(void)
 450 {
 451         block_dev_desc_t *stor_dev;
 452         long sz;
 453         int i, res, bitmap_first, cnt, old_ctrlc, got_ctrlc;
 454         char *env;
 455         long start, end;
 456
 457 #undef ERASE_EEPROM
 458 #ifdef ERASE_EEPROM
 459         int arr[18];
 460         memset(arr, 0, sizeof(arr));
 461         i2c_write_multiple(0x54, 64, 1, arr, sizeof(arr));
 462 #endif
 463         au_usb_stor_curr_dev = -1;
 464         /* start USB */
 465         if (usb_stop() < 0) {
 466                 debug ("usb_stop failed\n");
 467                 return -1;
 468         }
 469         if (usb_init() < 0) {
 470                 debug ("usb_init failed\n");
 471                 return -1;
 472         }
 473         /*
 474          * check whether a storage device is attached (assume that it's
 475          * a USB memory stick, since nothing else should be attached).
 476          */
 477         au_usb_stor_curr_dev = usb_stor_scan(0);
 478         if (au_usb_stor_curr_dev == -1) {
 479                 debug ("No device found. Not initialized?\n");
 480                 return -1;
 481         }
 482         /* check whether it has a partition table */
 483         stor_dev = get_dev("usb", 0);
 484         if (stor_dev == NULL) {
 485                 debug ("uknown device type\n");
 486                 return -1;
 487         }
 488         if (fat_register_device(stor_dev, 1) != 0) {
 489                 debug ("Unable to use USB %d:%d for fatls\n",
 490                         au_usb_stor_curr_dev, 1);
 491                 return -1;
 492         }
 493         if (file_fat_detectfs() != 0) {
 494                 debug ("file_fat_detectfs failed\n");
 495         }
 496
 497         /* initialize the array of file names */
 498         memset(aufile, 0, sizeof(aufile));
 499         aufile[IDX_PREPARE] = AU_PREPARE;
 500         aufile[IDX_PREINST] = AU_PREINST;
 501         aufile[IDX_FIRMWARE] = AU_FIRMWARE;
 502         aufile[IDX_KERNEL] = AU_KERNEL;
 503         aufile[IDX_APP] = AU_APP;
 504         aufile[IDX_DISK] = AU_DISK;
 505         aufile[IDX_POSTINST] = AU_POSTINST;
 506         /* initialize the array of flash sizes */
 507         memset(ausize, 0, sizeof(ausize));
 508         ausize[IDX_FIRMWARE] = (AU_FL_FIRMWARE_ND + 1) - AU_FL_FIRMWARE_ST;
 509         ausize[IDX_KERNEL] = (AU_FL_KERNEL_ND + 1) - AU_FL_KERNEL_ST;
 510         ausize[IDX_APP] = (AU_FL_APP_ND + 1) - AU_FL_APP_ST;
 511         ausize[IDX_DISK] = (AU_FL_DISK_ND + 1) - AU_FL_DISK_ST;
 512         /*
 513          * now check whether start and end are defined using environment
 514          * variables.
 515          */
 516         start = -1;
 517         end = 0;
 518         env = getenv("firmware_st");
 519         if (env != NULL)
 520                 start = simple_strtoul(env, NULL, 16);
 521         env = getenv("firmware_nd");
 522         if (env != NULL)
 523                 end = simple_strtoul(env, NULL, 16);
 524         if (start >= 0 && end && end > start) {
 525                 ausize[IDX_FIRMWARE] = (end + 1) - start;
 526                 aufl_layout[0].start = start;
 527                 aufl_layout[0].end = end;
 528         }
 529         start = -1;
 530         end = 0;
 531         env = getenv("kernel_st");
 532         if (env != NULL)
 533                 start = simple_strtoul(env, NULL, 16);
 534         env = getenv("kernel_nd");
 535         if (env != NULL)
 536                 end = simple_strtoul(env, NULL, 16);
 537         if (start >= 0 && end && end > start) {
 538                 ausize[IDX_KERNEL] = (end + 1) - start;
 539                 aufl_layout[1].start = start;
 540                 aufl_layout[1].end = end;
 541         }
 542         start = -1;
 543         end = 0;
 544         env = getenv("app_st");
 545         if (env != NULL)
 546                 start = simple_strtoul(env, NULL, 16);
 547         env = getenv("app_nd");
 548         if (env != NULL)
 549                 end = simple_strtoul(env, NULL, 16);
 550         if (start >= 0 && end && end > start) {
 551                 ausize[IDX_APP] = (end + 1) - start;
 552                 aufl_layout[2].start = start;
 553                 aufl_layout[2].end = end;
 554         }
 555         start = -1;
 556         end = 0;
 557         env = getenv("disk_st");
 558         if (env != NULL)
 559                 start = simple_strtoul(env, NULL, 16);
 560         env = getenv("disk_nd");
 561         if (env != NULL)
 562                 end = simple_strtoul(env, NULL, 16);
 563         if (start >= 0 && end && end > start) {
 564                 ausize[IDX_DISK] = (end + 1) - start;
 565                 aufl_layout[3].start = start;
 566                 aufl_layout[3].end = end;
 567         }
 568         /* make certain that HUSH is runnable */
 569         u_boot_hush_start();
 570         /* make sure that we see CTRL-C and save the old state */
 571         old_ctrlc = disable_ctrlc(0);
 572
 573         bitmap_first = 0;
 574         /* just loop thru all the possible files */
 575         for (i = 0; i < AU_MAXFILES; i++) {
 576                 /* just read the header */
 577                 sz = file_fat_read(aufile[i], LOAD_ADDR, sizeof(image_header_t));
 578                 debug ("read %s sz %ld hdr %d\n",
 579                         aufile[i], sz, sizeof(image_header_t));
 580                 if (sz <= 0 || sz < sizeof(image_header_t)) {
 581                         debug ("%s not found\n", aufile[i]);
 582                         continue;
 583                 }
 584                 if (au_check_header_valid(i, sz) < 0) {
 585                         debug ("%s header not valid\n", aufile[i]);
 586                         continue;
 587                 }
 588                 sz = file_fat_read(aufile[i], LOAD_ADDR, MAX_LOADSZ);
 589                 debug ("read %s sz %ld hdr %d\n",
 590                         aufile[i], sz, sizeof(image_header_t));
 591                 if (sz <= 0 || sz <= sizeof(image_header_t)) {
 592                         debug ("%s not found\n", aufile[i]);
 593                         continue;
 594                 }
 595                 if (au_check_cksum_valid(i, sz) < 0) {
 596                         debug ("%s checksum not valid\n", aufile[i]);
 597                         continue;
 598                 }
 599 #ifdef CONFIG_VFD
 600                 /* now that we have a valid file we can display the */
 601                 /* bitmap. */
 602                 if (bitmap_first == 0) {
 603                         env = getenv("bitmap2");
 604                         if (env == NULL) {
 605                                 trab_vfd(0);
 606                         } else {
 607                                 /* not so simple - bitmap2 is supposed to */
 608                                 /* contain the address of the bitmap */
 609                                 env = (char *)simple_strtoul(env, NULL, 16);
 610 /* NOTE: these are taken from vfd_logo.h. If that file changes then */
 611 /* these defines MUST also be updated! These may be wrong for bitmap2. */
 612 #define VFD_LOGO_WIDTH 112
 613 #define VFD_LOGO_HEIGHT 72
 614                                 /* must call transfer_pic directly */
 615                                 transfer_pic(3, (unsigned char *)env,
 616                                              VFD_LOGO_HEIGHT, VFD_LOGO_WIDTH);
 617                         }
 618                         bitmap_first = 1;
 619                 }
 620 #endif
 621                 /* this is really not a good idea, but it's what the */
 622                 /* customer wants. */
 623                 cnt = 0;
 624                 got_ctrlc = 0;
 625                 do {
 626                         res = au_do_update(i, sz);
 627                         /* let the user break out of the loop */
 628                         if (ctrlc() || had_ctrlc()) {
 629                                 clear_ctrlc();
 630                                 if (res < 0)
 631                                         got_ctrlc = 1;
 632                                 break;
 633                         }
 634                         cnt++;
 635 #ifdef AU_TEST_ONLY
 636                 } while (res < 0 && cnt < 3);
 637                 if (cnt < 3)
 638 #else
 639                 } while (res < 0);
 640 #endif
 641                 /*
 642                  * it doesn't make sense to update the EEPROM if the
 643                  * update was interrupted by the user due to errors.
 644                  */
 645                 if (got_ctrlc == 0)
 646                         au_update_eeprom(i);
 647                 else
 648                         /* enable the power switch */
 649                         *CPLD_VFD_BK &= ~POWER_OFF;
 650         }
 651         usb_stop();
 652         /* restore the old state */
 653         disable_ctrlc(old_ctrlc);
 654         return 0;
 655 }
 656 #endif /* CONFIG_AUTO_UPDATE */