100 lines
2.5 KiB
C
100 lines
2.5 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id: $
|
|
*
|
|
* Copyright (C) 2011 by Tomasz Moń
|
|
*
|
|
* 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-target.h"
|
|
#include "backlight.h"
|
|
#include "lcd.h"
|
|
#include "power.h"
|
|
#include "lcd-target.h"
|
|
|
|
static void _backlight_write_brightness(int brightness)
|
|
{
|
|
/*
|
|
Maps brightness int to percentage value found in OF
|
|
|
|
OF PWM1H
|
|
5% 14
|
|
10% 140
|
|
15% 210
|
|
20% 280
|
|
...
|
|
95% 1330
|
|
100% 1400
|
|
*/
|
|
if (brightness > 20)
|
|
brightness = 20;
|
|
else if (brightness < 0)
|
|
brightness = 0;
|
|
|
|
IO_CLK_PWM1H = brightness*70;
|
|
}
|
|
|
|
void _backlight_on(void)
|
|
{
|
|
#ifdef HAVE_LCD_SLEEP
|
|
if (!lcd_active())
|
|
{
|
|
lcd_awake();
|
|
lcd_update();
|
|
}
|
|
#endif
|
|
/* set GIO34 as PWM1 */
|
|
IO_GIO_FSEL3 = (IO_GIO_FSEL3 & 0xFFF3) | (1 << 2);
|
|
|
|
#if (CONFIG_BACKLIGHT_FADING == BACKLIGHT_NO_FADING)
|
|
_backlight_write_brightness(backlight_brightness);
|
|
#endif
|
|
}
|
|
|
|
void _backlight_off(void)
|
|
{
|
|
_backlight_write_brightness(0);
|
|
|
|
bitclr16(&IO_GIO_FSEL3, 0xC); /* set GIO34 to normal GIO */
|
|
bitclr16(&IO_GIO_INV2, (1 << 2)); /* make sure GIO34 is not inverted */
|
|
IO_GIO_BITCLR2 = (1 << 2); /* drive GIO34 low */
|
|
}
|
|
|
|
/* Assumes that the backlight has been initialized */
|
|
void _backlight_set_brightness(int brightness)
|
|
{
|
|
_backlight_write_brightness(brightness);
|
|
}
|
|
|
|
void __backlight_dim(bool dim_now)
|
|
{
|
|
_backlight_set_brightness(dim_now ?
|
|
DEFAULT_BRIGHTNESS_SETTING :
|
|
DEFAULT_DIMNESS_SETTING);
|
|
}
|
|
|
|
bool _backlight_init(void)
|
|
{
|
|
IO_CLK_PWM1C = 0x58D; /* as found in OF */
|
|
|
|
_backlight_set_brightness(backlight_brightness);
|
|
return true;
|
|
}
|
|
|