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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Linus Nielsen Feltzing
*
* 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 "cpu.h"
#include "system.h"
#include "backlight.h"
#include "backlight-target.h"
#include "pcf50606.h"
#include "lcd.h"
bool backlight_hw_init(void)
{
backlight_hw_brightness(DEFAULT_BRIGHTNESS_SETTING);
backlight_hw_on();
return true; /* Backlight always ON after boot. */
}
void backlight_hw_on(void)
{
int level;
#ifdef HAVE_LCD_ENABLE
lcd_enable(true); /* power on lcd + visible display */
#endif
level = disable_irq_save();
pcf50606_write(0x38, 0xb0); /* Backlight ON, GPO1INV=1, GPO1ACT=011 */
restore_irq(level);
}
void backlight_hw_off(void)
{
int level = disable_irq_save();
pcf50606_write(0x38, 0x80); /* Backlight OFF, GPO1INV=1, GPO1ACT=000 */
restore_irq(level);
#ifdef HAVE_LCD_ENABLE
lcd_enable(false); /* power off visible display */
#endif
}
/* set brightness by changing the PWM */
void backlight_hw_brightness(int val)
{
/* disable IRQs while bitbanging */
int old_irq_level = disable_irq_save();
pcf50606_write(0x35, (val << 1) | 0x01); /* 512Hz, Enable PWM */
/* enable IRQs again */
restore_irq(old_irq_level);
}
void remote_backlight_hw_on(void)
{
and_l(~0x00200000, &GPIO_OUT);
}
void remote_backlight_hw_off(void)
{
or_l(0x00200000, &GPIO_OUT);
}
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