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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Barry Wardell
*
* Based on Rockbox iriver bootloader by Linus Nielsen Feltzing
* and the ipodlinux bootloader by Daniel Palffy and Bernard Leach
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include "common.h"
#include "cpu.h"
#include "file.h"
#include "system.h"
#include "../kernel-internal.h"
#include "lcd.h"
#include "font.h"
#include "storage.h"
#include "button.h"
#include "disk.h"
#include "crc32-mi4.h"
#include <string.h>
#include "i2c.h"
#include "backlight-target.h"
#include "power.h"
#include "version.h"
#define START_SECTOR_OF_ROM 1
#define ROMSECTOR_TO_HACK 63
#define HACK_OFFSET 498
#define KNOWN_CRC32 0x5a09c266 /* E200R CRC before patching */
#define PATCHED_CRC32 0x0a162b34 /* E200R CRC after patching */
static unsigned char knownBytes[] = {0x00, 0x24, 0x07, 0xe1};
static unsigned char changedBytes[] = {0xc0, 0x46, 0xc0, 0x46 };
/*
CRC32s of sector 63 from E200 bootloaders - so we can tell users if they're
trying to use e200rpatcher with a vanilla e200.
These are all known E200 bootloaders as of 8 November 2007.
*/
static uint32_t e200_crcs[] =
{
0xbeceba58,
0x4e6b038f,
0x5e4f4219,
0xae087742,
0x3dd94852,
0x72fa69f3,
0x4ce0d10b
};
#define NUM_E200_CRCS ((int)((sizeof(e200_crcs) / sizeof(uint32_t))))
static bool is_e200(uint32_t crc)
{
int i;
for (i = 0 ; i < NUM_E200_CRCS ; i++)
{
if (crc == e200_crcs[i])
return true;
}
return false;
}
void* main(void)
{
int i;
int btn;
int num_partitions;
int crc32;
char sector[512];
struct partinfo* pinfo;
system_init();
kernel_init();
lcd_init();
font_init();
button_init();
i2c_init();
_backlight_on();
lcd_set_foreground(LCD_WHITE);
lcd_set_background(LCD_BLACK);
lcd_clear_display();
btn = button_read_device();
verbose = true;
lcd_setfont(FONT_SYSFIXED);
printf("Rockbox e200R installer");
printf("Version: " RBVERSION);
printf(MODEL_NAME);
printf("");
i=storage_init();
disk_init(IF_MV(0));
num_partitions = disk_mount_all();
if (num_partitions<=0)
{
error(EDISK, num_partitions, true);
}
pinfo = disk_partinfo(1);
#if 0 /* not needed in release builds */
printf("--- Partition info ---");
printf("start: %x", pinfo->start);
printf("size: %x", pinfo->size);
printf("type: %x", pinfo->type);
printf("reading: %x", (START_SECTOR_OF_ROM + ROMSECTOR_TO_HACK)*512);
#endif
storage_read_sectors(pinfo->start + START_SECTOR_OF_ROM + ROMSECTOR_TO_HACK,
1 , sector);
crc32 = chksum_crc32 (sector, 512);
#if 0 /* not needed in release builds */
printf("--- Hack Status ---");
printf("Sector checksum: %x", crc32);
#endif
if (crc32 == PATCHED_CRC32)
{
/* Bootloader already patched */
printf("Already unlocked");
printf("Proceed to Step 2");
} else if ((crc32 == KNOWN_CRC32) &&
!memcmp(§or[HACK_OFFSET], knownBytes,
sizeof(knownBytes)/sizeof(*knownBytes)))
{
/* E200R bootloader detected - patch it */
memcpy(§or[HACK_OFFSET], changedBytes,
sizeof(changedBytes)/sizeof(*changedBytes));
storage_write_sectors(
pinfo->start + START_SECTOR_OF_ROM + ROMSECTOR_TO_HACK,
1 , sector);
printf("Firmware unlocked");
printf("Proceed to Step 2");
} else if (is_e200(crc32))
{
printf("Vanilla E200 detected!");
printf("Please install using");
printf("Sansapatcher");
}
else
{
printf("Unknown bootloader");
printf("Rockbox installer cannot");
printf("continue");
}
/* Turn button lights off */
GPIOG_OUTPUT_VAL &=~0x80;
printf("");
if (button_hold())
printf("Release Hold and");
printf("Press any key to shutdown");
while(button_read_device() == BUTTON_NONE);
power_off();
return NULL;
}
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