rbutil/sansapatcher/sansaio.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2006-2007 Dave Chapman
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #ifndef __SANSAIO_H
  23 #define __SANSAIO_H
  24
  25 #include <stdint.h>
  26 #include <unistd.h>
  27
  28 #ifdef __WIN32__
  29 #include <windows.h>
  30 #define loff_t int64_t
  31 #else
  32 #define HANDLE int
  33 #define O_BINARY 0
  34
  35 /* Only Linux seems to need lseek64 and loff_t */
  36 #if !defined(linux) && !defined (__linux)
  37 #define loff_t off_t
  38 #define lseek64 lseek
  39 #endif
  40
  41 #endif
  42
  43 struct sansa_partinfo_t {
  44     unsigned long start; /* first sector (LBA) */
  45     unsigned long size;  /* number of sectors */
  46     int type;
  47 };
  48
  49 struct mi4header_t {
  50     uint32_t version;
  51     uint32_t length;
  52     uint32_t crc32;
  53     uint32_t enctype;
  54     uint32_t mi4size;
  55     uint32_t plaintext;
  56 };
  57
  58 struct sansa_t {
  59     HANDLE dh;
  60     char diskname[4096];
  61     int sector_size;
  62     struct sansa_partinfo_t pinfo[4];
  63     int hasoldbootloader;
  64     char* targetname; /* "e200" or "c200" */
  65     loff_t start;  /* Offset in bytes of firmware partition from start of disk */
  66 };
  67
  68 void sansa_print_error(char* msg);
  69 int sansa_open(struct sansa_t* sansa, int silent);
  70 int sansa_reopen_rw(struct sansa_t* sansa);
  71 int sansa_close(struct sansa_t* sansa);
  72 int sansa_seek(struct sansa_t* sansa, loff_t pos);
  73 int sansa_read(struct sansa_t* sansa, unsigned char* buf, int nbytes);
  74 int sansa_write(struct sansa_t* sansa, unsigned char* buf, int nbytes);
  75 int sansa_alloc_buffer(unsigned char** sectorbuf, int bufsize);
  76
  77 #endif