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  * All files in this archive are subject to the GNU General Public License.
  16  * See the file COPYING in the source tree root for full license agreement.
  17  *
  18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  19  * KIND, either express or implied.
  20  *
  21  ****************************************************************************/
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include "common.h"
  25 #include "cpu.h"
  26 #include "file.h"
  27 #include "system.h"
  28 #include "kernel.h"
  29 #include "lcd.h"
  30 #include "font.h"
  31 #include "ata.h"
  32 #include "button.h"
  33 #include "disk.h"
  34 #include "crc32-mi4.h"
  35 #include <string.h>
  36 #include "i2c.h"
  37 #include "backlight-target.h"
  38 #include "power.h"
  39
  40 /* Bootloader version */
  41 char version[] = APPSVERSION;
  42
  43 #define START_SECTOR_OF_ROM 1
  44 #define ROMSECTOR_TO_HACK 63
  45 #define HACK_OFFSET 498
  46 #define KNOWN_CRC32 0x5a09c266
  47 char knownBytes[] = {0x00, 0x24, 0x07, 0xe1};
  48 char changedBytes[] = {0xc0, 0x46, 0xc0, 0x46 };
  49 void* main(void)
  50 {
  51     int i;
  52     int btn;
  53     int num_partitions;
  54     int crc32;
  55     char sector[512];
  56     struct partinfo* pinfo;
  57     chksum_crc32gentab ();
  58
  59     system_init();
  60     kernel_init();
  61     lcd_init();
  62     font_init();
  63     button_init();
  64     i2c_init();
  65     __backlight_on();
  66
  67     lcd_set_foreground(LCD_WHITE);
  68     lcd_set_background(LCD_BLACK);
  69     lcd_clear_display();
  70
  71     btn = button_read_device();
  72     verbose = true;
  73
  74     lcd_setfont(FONT_SYSFIXED);
  75
  76     printf("Rockbox e200R installer");
  77     printf("Version: %s", version);
  78     printf(MODEL_NAME);
  79     printf("");
  80
  81     i=ata_init();
  82     disk_init(IF_MV(0));
  83     num_partitions = disk_mount_all();
  84     if (num_partitions<=0)
  85     {
  86         error(EDISK,num_partitions);
  87     }
  88     pinfo = disk_partinfo(1);
  89 #if 0 /* not needed in release builds */
  90     printf("--- Partition info ---");
  91     printf("start: %x", pinfo->start);
  92     printf("size: %x", pinfo->size);
  93     printf("type: %x", pinfo->type);
  94     printf("reading: %x", (START_SECTOR_OF_ROM + ROMSECTOR_TO_HACK)*512);
  95 #endif
  96     ata_read_sectors(IF_MV2(0,)
  97                         pinfo->start + START_SECTOR_OF_ROM + ROMSECTOR_TO_HACK,
  98                         1 , sector);
  99     crc32 = chksum_crc32 (sector, 512);
 100 #if 0 /* not needed in release builds */
 101     printf("--- Hack Status ---");
 102     printf("Sector checksum: %x", crc32);
 103 #endif
 104     if ((crc32 == KNOWN_CRC32) &&
 105         !memcmp(&sector[HACK_OFFSET], knownBytes,
 106                 sizeof(knownBytes)/sizeof(*knownBytes)))
 107     {
 108
 109         memcpy(&sector[HACK_OFFSET], changedBytes,
 110                 sizeof(changedBytes)/sizeof(*changedBytes));
 111         ata_write_sectors(IF_MV2(0,)
 112                         pinfo->start + START_SECTOR_OF_ROM + ROMSECTOR_TO_HACK,
 113                         1 , sector);
 114         printf("Firmware Unlocked");
 115         printf("Proceed to Step 2");
 116     }
 117     else
 118     {
 119         printf("Unknown bootloader");
 120         printf("Rockbox installer cannot");
 121         printf("continue");
 122     }
 123     GPIOG_OUTPUT_VAL &=~0x80;
 124     printf("");
 125     if (button_hold())
 126         printf("Release Hold and");
 127     printf("Press any key to shutdown");
 128     while(button_read_device() == BUTTON_NONE)
 129         ;
 130     power_off();
 131     return NULL;
 132 }
 133