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 #include "version.h"
  43
  44 #define START_SECTOR_OF_ROM 1
  45 #define ROMSECTOR_TO_HACK 63
  46 #define HACK_OFFSET 498
  47 #define KNOWN_CRC32 0x5a09c266    /* E200R CRC before patching */
  48 #define PATCHED_CRC32 0x0a162b34  /* E200R CRC after patching */
  49
  50 static unsigned char knownBytes[] = {0x00, 0x24, 0x07, 0xe1};
  51 static unsigned char changedBytes[] = {0xc0, 0x46, 0xc0, 0x46 };
  52
  53 /*
  54    CRC32s of sector 63 from E200 bootloaders - so we can tell users if they're
  55    trying to use e200rpatcher with a vanilla e200.
  56
  57    These are all known E200 bootloaders as of 8 November 2007.
  58
  59 */
  60
  61 static uint32_t e200_crcs[] =
  62 {
  63     0xbeceba58,
  64     0x4e6b038f,
  65     0x5e4f4219,
  66     0xae087742,
  67     0x3dd94852,
  68     0x72fa69f3,
  69     0x4ce0d10b
  70 };
  71
  72 #define NUM_E200_CRCS ((int)((sizeof(e200_crcs) / sizeof(uint32_t))))
  73
  74 static bool is_e200(uint32_t crc)
  75 {
  76     int i;
  77
  78     for (i = 0 ; i < NUM_E200_CRCS ; i++)
  79     {
  80         if (crc == e200_crcs[i])
  81             return true;
  82     }
  83
  84     return false;
  85 }
  86
  87
  88 void* main(void)
  89 {
  90     int i;
  91     int btn;
  92     int num_partitions;
  93     int crc32;
  94     char sector[512];
  95     struct partinfo* pinfo;
  96
  97     chksum_crc32gentab ();
  98
  99     system_init();
 100     kernel_init();
 101     lcd_init();
 102     font_init();
 103     button_init();
 104     i2c_init();
 105     _backlight_on();
 106
 107     lcd_set_foreground(LCD_WHITE);
 108     lcd_set_background(LCD_BLACK);
 109     lcd_clear_display();
 110
 111     btn = button_read_device();
 112     verbose = true;
 113
 114     lcd_setfont(FONT_SYSFIXED);
 115
 116     printf("Rockbox e200R installer");
 117     printf("Version: " RBVERSION);
 118     printf(MODEL_NAME);
 119     printf("");
 120
 121     i=storage_init();
 122     disk_init(IF_MV(0));
 123     num_partitions = disk_mount_all();
 124
 125     if (num_partitions<=0)
 126     {
 127         error(EDISK, num_partitions, true);
 128     }
 129
 130     pinfo = disk_partinfo(1);
 131
 132 #if 0 /* not needed in release builds */
 133     printf("--- Partition info ---");
 134     printf("start: %x", pinfo->start);
 135     printf("size: %x", pinfo->size);
 136     printf("type: %x", pinfo->type);
 137     printf("reading: %x", (START_SECTOR_OF_ROM + ROMSECTOR_TO_HACK)*512);
 138 #endif
 139
 140     storage_read_sectors(pinfo->start + START_SECTOR_OF_ROM + ROMSECTOR_TO_HACK,
 141                          1 , sector);
 142     crc32 = chksum_crc32 (sector, 512);
 143
 144 #if 0 /* not needed in release builds */
 145     printf("--- Hack Status ---");
 146     printf("Sector checksum: %x", crc32);
 147 #endif
 148
 149     if (crc32 == PATCHED_CRC32)
 150     {
 151         /* Bootloader already patched */
 152         printf("Already unlocked");
 153         printf("Proceed to Step 2");
 154     } else if ((crc32 == KNOWN_CRC32) &&
 155                 !memcmp(&sector[HACK_OFFSET], knownBytes,
 156                 sizeof(knownBytes)/sizeof(*knownBytes)))
 157     {
 158         /* E200R bootloader detected - patch it */
 159         memcpy(&sector[HACK_OFFSET], changedBytes,
 160                 sizeof(changedBytes)/sizeof(*changedBytes));
 161         storage_write_sectors(
 162                         pinfo->start + START_SECTOR_OF_ROM + ROMSECTOR_TO_HACK,
 163                         1 , sector);
 164         printf("Firmware unlocked");
 165         printf("Proceed to Step 2");
 166     } else if (is_e200(crc32))
 167     {
 168         printf("Vanilla E200 detected!");
 169         printf("Please install using");
 170         printf("Sansapatcher");
 171     }
 172     else
 173     {
 174         printf("Unknown bootloader");
 175         printf("Rockbox installer cannot");
 176         printf("continue");
 177     }
 178
 179     /* Turn button lights off */
 180     GPIOG_OUTPUT_VAL &=~0x80;
 181
 182     printf("");
 183
 184     if (button_hold())
 185         printf("Release Hold and");
 186
 187     printf("Press any key to shutdown");
 188
 189     while(button_read_device() == BUTTON_NONE);
 190
 191     power_off();
 192
 193     return NULL;
 194 }