2009-10-19 18:14:27 +00:00
|
|
|
/***************************************************************************
|
|
|
|
* __________ __ ___.
|
|
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
|
|
* \/ \/ \/ \/ \/
|
|
|
|
* $Id$
|
|
|
|
*
|
|
|
|
* Copyright (C) 2009 by Bob Cousins
|
|
|
|
*
|
|
|
|
* 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"
|
|
|
|
|
|
|
|
|
|
|
|
/* Dummy value at index 0, 1-12 used. */
|
|
|
|
static const unsigned char log_brightness[13] =
|
|
|
|
{0,0,1,2,3,5,7,10,15,22,31,44,63};
|
|
|
|
|
|
|
|
|
|
|
|
static enum backlight_states
|
|
|
|
{
|
|
|
|
BACKLIGHT_CONTROL_IDLE,
|
|
|
|
BACKLIGHT_CONTROL_OFF,
|
|
|
|
BACKLIGHT_CONTROL_ON,
|
|
|
|
BACKLIGHT_CONTROL_SET,
|
|
|
|
BACKLIGHT_CONTROL_FADE
|
|
|
|
} backlight_control;
|
|
|
|
|
|
|
|
static unsigned char _backlight_brightness;
|
|
|
|
static unsigned char backlight_target;
|
|
|
|
|
|
|
|
|
|
|
|
/* Assumes that the backlight has been initialized */
|
|
|
|
void _backlight_set_brightness(int brightness)
|
|
|
|
{
|
|
|
|
/* stop the interrupt from messing us up */
|
|
|
|
backlight_control = BACKLIGHT_CONTROL_IDLE;
|
|
|
|
_backlight_brightness = log_brightness[brightness];
|
|
|
|
backlight_control = BACKLIGHT_CONTROL_SET;
|
|
|
|
}
|
|
|
|
|
2010-08-01 08:56:15 +00:00
|
|
|
static void _backlight_set_state (unsigned int level)
|
2009-10-19 18:14:27 +00:00
|
|
|
{
|
|
|
|
if (level == 0)
|
|
|
|
GPGDAT &= ~GPIO_LCD_PWR;
|
|
|
|
else
|
|
|
|
GPGDAT |= GPIO_LCD_PWR;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* led_control_service runs in interrupt context - be brief!
|
|
|
|
* This service is called once per interrupt timer tick - 100 times a second.
|
|
|
|
*
|
|
|
|
* There should be at most only one i2c operation per call - if more are need
|
|
|
|
* the calls should be spread across calls.
|
|
|
|
*
|
|
|
|
* Putting all led servicing in one thread means that we wont step on any
|
|
|
|
* i2c operations - they are all serialized here in the ISR tick. It also
|
|
|
|
* insures that we get called at equal timing for good visual effect.
|
|
|
|
*/
|
|
|
|
#ifndef BOOTLOADER
|
|
|
|
static void led_control_service(void)
|
|
|
|
{
|
|
|
|
switch (backlight_control)
|
|
|
|
{
|
|
|
|
case BACKLIGHT_CONTROL_IDLE:
|
|
|
|
backlight_control = BACKLIGHT_CONTROL_IDLE;
|
|
|
|
break;
|
|
|
|
case BACKLIGHT_CONTROL_OFF:
|
|
|
|
_backlight_set_brightness(0);
|
|
|
|
backlight_control = BACKLIGHT_CONTROL_IDLE;
|
|
|
|
break;
|
|
|
|
case BACKLIGHT_CONTROL_ON:
|
|
|
|
_backlight_set_brightness(255);
|
|
|
|
backlight_control = BACKLIGHT_CONTROL_IDLE;
|
|
|
|
break;
|
|
|
|
case BACKLIGHT_CONTROL_SET:
|
|
|
|
_backlight_set_brightness(255);
|
|
|
|
backlight_control = BACKLIGHT_CONTROL_IDLE;
|
|
|
|
break;
|
|
|
|
case BACKLIGHT_CONTROL_FADE:
|
|
|
|
_backlight_set_brightness(0);
|
|
|
|
backlight_control = BACKLIGHT_CONTROL_IDLE;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
backlight_control = BACKLIGHT_CONTROL_IDLE;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif /* BOOTLOADER */
|
|
|
|
|
|
|
|
static void __backlight_dim(bool dim_now)
|
|
|
|
{
|
|
|
|
/* dont let the interrupt tick happen */
|
|
|
|
backlight_control = BACKLIGHT_CONTROL_IDLE;
|
|
|
|
backlight_target = dim_now ? 0 : _backlight_brightness;
|
|
|
|
if(backlight_target==0 && _backlight_brightness==0)
|
|
|
|
{
|
|
|
|
if(dim_now == false)
|
|
|
|
backlight_control = BACKLIGHT_CONTROL_ON;
|
|
|
|
else
|
|
|
|
backlight_control = BACKLIGHT_CONTROL_OFF;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
backlight_control = BACKLIGHT_CONTROL_FADE;
|
|
|
|
}
|
|
|
|
|
|
|
|
void _backlight_on(void)
|
|
|
|
{
|
|
|
|
#ifdef HAVE_LCD_ENABLE
|
|
|
|
lcd_enable(true); /* power on lcd + visible display */
|
|
|
|
#endif
|
|
|
|
__backlight_dim(false);
|
|
|
|
}
|
|
|
|
|
|
|
|
void _backlight_off(void)
|
|
|
|
{
|
|
|
|
__backlight_dim(true);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
bool _backlight_init(void)
|
|
|
|
{
|
|
|
|
unsigned char brightness = log_brightness[DEFAULT_BRIGHTNESS_SETTING];
|
|
|
|
_backlight_brightness = brightness;
|
|
|
|
|
|
|
|
backlight_control = BACKLIGHT_CONTROL_ON;
|
|
|
|
|
|
|
|
_backlight_set_state (1);
|
|
|
|
S3C2440_GPIO_CONFIG (GPGCON, 4, GPIO_OUTPUT);
|
|
|
|
|
|
|
|
#ifndef BOOTLOADER
|
|
|
|
/* put the led control on the tick list */
|
|
|
|
tick_add_task(led_control_service);
|
|
|
|
#endif
|
|
|
|
return true;
|
|
|
|
}
|