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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 by Mark Arigo
*
* 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 "config.h"
#include "system.h"
#include "backlight-target.h"
#define MIN_BRIGHTNESS 0x80ff08ff
static const int log_brightness[12] = {0,4,8,12,20,28,40,60,88,124,176,255};
/* Returns the current state of the backlight (true=ON, false=OFF). */
bool _backlight_init(void)
{
return (GPO32_ENABLE & 0x1000000) ? true : false;
}
void _backlight_hw_on(void)
{
GPO32_ENABLE |= 0x1000000;
}
void _backlight_hw_off(void)
{
GPO32_ENABLE &= ~0x1000000;
}
void _buttonlight_set_brightness(int brightness)
{
/* clamp the brightness value */
brightness = MAX(0, MIN(15, brightness));
outl(MIN_BRIGHTNESS-(log_brightness[brightness - 1] << 16), 0x7000a010);
}
void _buttonlight_on(void)
{
/* turn on all touchpad leds */
GPIOA_OUTPUT_VAL |= BUTTONLIGHT_ALL;
}
void _buttonlight_off(void)
{
/* turn off all touchpad leds */
GPIOA_OUTPUT_VAL &= ~BUTTONLIGHT_ALL;
}
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