bootloader/main-e200r-installer.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2006 by Barry Wardell
  11  *
  12  * Based on Rockbox iriver bootloader by Linus Nielsen Feltzing
  13  * and the ipodlinux bootloader by Daniel Palffy and Bernard Leach
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
  17  * as published by the Free Software Foundation; either version 2
  18  * of the License, or (at your option) any later version.
  19  *
  20  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  21  * KIND, either express or implied.
  22  *
  23  ****************************************************************************/
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include "common.h"
  28 #include "cpu.h"
  29 #include "file.h"
  30 #include "system.h"
  31 #include "kernel.h"
  32 #include "lcd.h"
  33 #include "font.h"
  34 #include "storage.h"
  35 #include "button.h"
  36 #include "disk.h"
  37 #include "crc32-mi4.h"
  38 #include <string.h>
  39 #include "i2c.h"
  40 #include "backlight-target.h"
  41 #include "power.h"
  42
  43 /* Bootloader version */
  44 char version[] = APPSVERSION;
  45
  46 #define START_SECTOR_OF_ROM 1
  47 #define ROMSECTOR_TO_HACK 63
  48 #define HACK_OFFSET 498
  49 #define KNOWN_CRC32 0x5a09c266    /* E200R CRC before patching */
  50 #define PATCHED_CRC32 0x0a162b34  /* E200R CRC after patching */
  51
  52 static unsigned char knownBytes[] = {0x00, 0x24, 0x07, 0xe1};
  53 static unsigned char changedBytes[] = {0xc0, 0x46, 0xc0, 0x46 };
  54
  55 /*
  56    CRC32s of sector 63 from E200 bootloaders - so we can tell users if they're
  57    trying to use e200rpatcher with a vanilla e200.
  58
  59    These are all known E200 bootloaders as of 8 November 2007.
  60
  61 */
  62
  63 static uint32_t e200_crcs[] =
  64 {
  65     0xbeceba58,
  66     0x4e6b038f,
  67     0x5e4f4219,
  68     0xae087742,
  69     0x3dd94852,
  70     0x72fa69f3,
  71     0x4ce0d10b
  72 };
  73
  74 #define NUM_E200_CRCS ((int)((sizeof(e200_crcs) / sizeof(uint32_t))))
  75
  76 static bool is_e200(uint32_t crc)
  77 {
  78     int i;
  79
  80     for (i = 0 ; i < NUM_E200_CRCS ; i++)
  81     {
  82         if (crc == e200_crcs[i])
  83             return true;
  84     }
  85
  86     return false;
  87 }
  88
  89
  90 void* main(void)
  91 {
  92     int i;
  93     int btn;
  94     int num_partitions;
  95     int crc32;
  96     char sector[512];
  97     struct partinfo* pinfo;
  98
  99     chksum_crc32gentab ();
 100
 101     system_init();
 102     kernel_init();
 103     lcd_init();
 104     font_init();
 105     button_init();
 106     i2c_init();
 107     _backlight_on();
 108
 109     lcd_set_foreground(LCD_WHITE);
 110     lcd_set_background(LCD_BLACK);
 111     lcd_clear_display();
 112
 113     btn = button_read_device();
 114     verbose = true;
 115
 116     lcd_setfont(FONT_SYSFIXED);
 117
 118     printf("Rockbox e200R installer");
 119     printf("Version: %s", version);
 120     printf(MODEL_NAME);
 121     printf("");
 122
 123     i=storage_init();
 124     disk_init(IF_MV(0));
 125     num_partitions = disk_mount_all();
 126
 127     if (num_partitions<=0)
 128     {
 129         error(EDISK,num_partitions);
 130     }
 131
 132     pinfo = disk_partinfo(1);
 133
 134 #if 0 /* not needed in release builds */
 135     printf("--- Partition info ---");
 136     printf("start: %x", pinfo->start);
 137     printf("size: %x", pinfo->size);
 138     printf("type: %x", pinfo->type);
 139     printf("reading: %x", (START_SECTOR_OF_ROM + ROMSECTOR_TO_HACK)*512);
 140 #endif
 141
 142     storage_read_sectors(pinfo->start + START_SECTOR_OF_ROM + ROMSECTOR_TO_HACK,
 143                          1 , sector);
 144     crc32 = chksum_crc32 (sector, 512);
 145
 146 #if 0 /* not needed in release builds */
 147     printf("--- Hack Status ---");
 148     printf("Sector checksum: %x", crc32);
 149 #endif
 150
 151     if (crc32 == PATCHED_CRC32)
 152     {
 153         /* Bootloader already patched */
 154         printf("Already unlocked");
 155         printf("Proceed to Step 2");
 156     } else if ((crc32 == KNOWN_CRC32) &&
 157                 !memcmp(&sector[HACK_OFFSET], knownBytes,
 158                 sizeof(knownBytes)/sizeof(*knownBytes)))
 159     {
 160         /* E200R bootloader detected - patch it */
 161         memcpy(&sector[HACK_OFFSET], changedBytes,
 162                 sizeof(changedBytes)/sizeof(*changedBytes));
 163         storage_write_sectors(
 164                         pinfo->start + START_SECTOR_OF_ROM + ROMSECTOR_TO_HACK,
 165                         1 , sector);
 166         printf("Firmware unlocked");
 167         printf("Proceed to Step 2");
 168     } else if (is_e200(crc32))
 169     {
 170         printf("Vanilla E200 detected!");
 171         printf("Please install using");
 172         printf("Sansapatcher");
 173     }
 174     else
 175     {
 176         printf("Unknown bootloader");
 177         printf("Rockbox installer cannot");
 178         printf("continue");
 179     }
 180
 181     /* Turn button lights off */
 182     GPIOG_OUTPUT_VAL &=~0x80;
 183
 184     printf("");
 185
 186     if (button_hold())
 187         printf("Release Hold and");
 188
 189     printf("Press any key to shutdown");
 190
 191     while(button_read_device() == BUTTON_NONE);
 192
 193     power_off();
 194
 195     return NULL;
 196 }