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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id: backlight-nano2g.c 28601 2010-11-14 20:39:18Z theseven $
*
* Copyright (C) 2009 by Dave Chapman
*
* 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 <stdbool.h>
#include "config.h"
#include "kernel.h"
#include "backlight.h"
#include "backlight-target.h"
#include "pmu-target.h"
#ifdef HAVE_LCD_SLEEP
bool lcd_active(void);
void lcd_awake(void);
void lcd_update(void);
#endif
void backlight_hw_brightness(int brightness)
{
pmu_write(0x28, brightness);
}
void backlight_hw_on(void)
{
#ifdef HAVE_LCD_SLEEP
if (!lcd_active())
{
lcd_awake();
}
#endif
pmu_write(0x29, 1);
}
void backlight_hw_off(void)
{
pmu_write(0x29, 0);
}
bool backlight_hw_init(void)
{
/* LEDCTL: overvoltage protection enabled, OCP limit is 500mA */
pmu_write(0x2a, 0x05);
pmu_write(0x2b, 0x14); /* T_dimstep = 16 * value / 32768 */
backlight_hw_brightness(DEFAULT_BRIGHTNESS_SETTING);
backlight_hw_on();
return true;
}
/* Kill the backlight, instantly. */
void backlight_hw_kill(void)
{
pmu_write(0x2b, 0); /* T_dimstep = 0 */
backlight_hw_off();
}
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