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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Miika Pekkarinen
*
* 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 "eeprom_settings.h"
#include "eeprom_24cxx.h"
#include "crc32.h"
#include "system.h"
#include "string.h"
#include "logf.h"
struct eeprom_settings firmware_settings;
static bool reset_config(void)
{
memset(&firmware_settings, 0, sizeof(struct eeprom_settings));
#ifdef BOOTLOADER
/* Don't reset settings if we are inside bootloader. */
firmware_settings.initialized = false;
#else
firmware_settings.version = EEPROM_SETTINGS_VERSION;
firmware_settings.initialized = true;
firmware_settings.bootmethod = BOOT_RECOVERY;
firmware_settings.bl_version = 0;
#endif
return firmware_settings.initialized;
}
bool eeprom_settings_init(void)
{
int ret;
uint32_t sum;
eeprom_24cxx_init();
/* Check if player has been flashed. */
if (detect_original_firmware())
{
memset(&firmware_settings, 0, sizeof(struct eeprom_settings));
firmware_settings.initialized = false;
logf("Rockbox in flash is required");
return false;
}
ret = eeprom_24cxx_read(0, &firmware_settings,
sizeof(struct eeprom_settings));
if (ret < 0)
{
memset(&firmware_settings, 0, sizeof(struct eeprom_settings));
firmware_settings.initialized = false;
return false;
}
sum = crc_32(&firmware_settings, sizeof(struct eeprom_settings)-4,
0xffffffff);
logf("BL version: %d", firmware_settings.bl_version);
if (firmware_settings.version != EEPROM_SETTINGS_VERSION)
{
logf("Version mismatch");
return reset_config();
}
if (firmware_settings.checksum != sum)
{
logf("Checksum mismatch");
return reset_config();
}
#ifndef BOOTLOADER
if (firmware_settings.bl_version < EEPROM_SETTINGS_BL_MINVER)
{
logf("Too old bootloader: %d", firmware_settings.bl_version);
return reset_config();
}
#endif
return true;
}
bool eeprom_settings_store(void)
{
int ret;
uint32_t sum;
if (!firmware_settings.initialized || detect_original_firmware())
{
logf("Rockbox in flash is required");
return false;
}
/* Update the checksum. */
sum = crc_32(&firmware_settings, sizeof(struct eeprom_settings)-4,
0xffffffff);
firmware_settings.checksum = sum;
ret = eeprom_24cxx_write(0, &firmware_settings,
sizeof(struct eeprom_settings));
if (ret < 0)
firmware_settings.initialized = false;
return ret;
}
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