tools/mr500.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  *
   9  *   Copyright (C) 2009 by Karl Kurbjun
  10  *   $Id$
  11  *
  12  * All files in this archive are subject to the GNU General Public License.
  13  * See the file COPYING in the source tree root for full license agreement.
  14  *
  15  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  16  * KIND, either express or implied.
  17  *
  18  ****************************************************************************/
  19
  20 #include <stdlib.h>
  21 extern int decrypt_array[];
  22 extern int encrypt_array[];
  23
  24 /* Notes about the header:
  25  *  The magic_name should always be "OIMCFWUP"
  26  *  Header length is always 18 bytes
  27  *  The flags have the following mask:
  28  *      CHECK_CRC   0x01    : Tells the firmware whether or not to check CRC
  29  *      ENDIAN_MODE 0x02    : Tells the OF whether to re-order the bytes
  30  *      The rest are unknown
  31  *  The image length is in bytes and is always 0x007F0000
  32  */
  33 struct olympus_header {
  34     int8_t          magic_name[8];
  35     uint32_t        unknown;
  36     uint16_t        header_length;
  37     uint16_t        flags;
  38     uint32_t        unknown_zeros;
  39     uint32_t        image_length;
  40 } __attribute__((__packed__));
  41
  42 /* Patch entries should be saved in little endian format */
  43 struct patch_single {
  44     off_t       offset;
  45     uint32_t    value;
  46 };
  47
  48 int mr500_patch_file(char *, struct patch_single *, int);
  49 int mr500_save_header(char *, struct olympus_header *);
  50 int mr500_read_header(char *, struct olympus_header *);
  51 int mr500_save_crc(char *, off_t, uint32_t *);
  52 int mr500_read_crc(char *, off_t, uint32_t *);
  53 int mr500_calculate_crc(char *, off_t, unsigned int, uint32_t *);
  54 int mr500_save_data(char *, char *, off_t, unsigned int, int*);
  55 int mr500_init(void);
  56