125 lines
3.5 KiB
C
125 lines
3.5 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2006 by Miika Pekkarinen
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "eeprom_settings.h"
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#include "eeprom_24cxx.h"
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#include "crc32.h"
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#include "system.h"
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#include "string.h"
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#include "logf.h"
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struct eeprom_settings firmware_settings;
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static bool reset_config(void)
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{
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memset(&firmware_settings, 0, sizeof(struct eeprom_settings));
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#ifdef BOOTLOADER
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/* Don't reset settings if we are inside bootloader. */
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firmware_settings.initialized = false;
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#else
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firmware_settings.version = EEPROM_SETTINGS_VERSION;
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firmware_settings.initialized = true;
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firmware_settings.bootmethod = BOOT_RECOVERY;
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firmware_settings.bl_version = 0;
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#endif
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return firmware_settings.initialized;
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}
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bool eeprom_settings_init(void)
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{
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int ret;
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uint32_t sum;
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eeprom_24cxx_init();
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/* Check if player has been flashed. */
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if (detect_original_firmware())
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{
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memset(&firmware_settings, 0, sizeof(struct eeprom_settings));
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firmware_settings.initialized = false;
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logf("Rockbox in flash is required");
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return false;
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}
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ret = eeprom_24cxx_read(0, &firmware_settings,
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sizeof(struct eeprom_settings));
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if (ret < 0)
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{
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memset(&firmware_settings, 0, sizeof(struct eeprom_settings));
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firmware_settings.initialized = false;
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return false;
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}
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sum = crc_32(&firmware_settings, sizeof(struct eeprom_settings)-4,
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0xffffffff);
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logf("BL version: %d", firmware_settings.bl_version);
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if (firmware_settings.version != EEPROM_SETTINGS_VERSION)
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{
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logf("Version mismatch");
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return reset_config();
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}
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if (firmware_settings.checksum != sum)
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{
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logf("Checksum mismatch");
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return reset_config();
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}
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#ifndef BOOTLOADER
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if (firmware_settings.bl_version < EEPROM_SETTINGS_BL_MINVER)
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{
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logf("Too old bootloader: %d", firmware_settings.bl_version);
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return reset_config();
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}
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#endif
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return true;
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}
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bool eeprom_settings_store(void)
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{
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int ret;
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uint32_t sum;
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if (!firmware_settings.initialized || detect_original_firmware())
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{
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logf("Rockbox in flash is required");
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return false;
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}
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/* Update the checksum. */
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sum = crc_32(&firmware_settings, sizeof(struct eeprom_settings)-4,
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0xffffffff);
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firmware_settings.checksum = sum;
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ret = eeprom_24cxx_write(0, &firmware_settings,
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sizeof(struct eeprom_settings));
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if (ret < 0)
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firmware_settings.initialized = false;
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return ret;
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}
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