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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2013 by Amaury Pouly
*
* 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.h"
#include "lcd.h"
#include "backlight-target.h"
#include "uartdbg-imx233.h"
#include "pinctrl-imx233.h"
#include "pwm-imx233.h"
void backlight_hw_brightness(int level)
{
#if defined(CREATIVE_ZENXFISTYLE)
imx233_pwm_setup_simple(4, 24000, level);
imx233_pwm_enable(4, true);
#elif defined(CREATIVE_ZENV)
lcd_set_contrast(level);
#else
unsigned val = (level + 200) * level / 1000;
if(level != 0)
{
for(unsigned mask = 0x10; mask; mask >>= 1)
imx233_uartdbg_send((val & mask) ? 0xff : 0xf8);
imx233_uartdbg_send(0);
imx233_pinctrl_set_gpio(1, 12, true);
}
else
imx233_pinctrl_set_gpio(1, 12, false);
#endif
}
bool backlight_hw_init(void)
{
#if !defined(CREATIVE_ZENV) && !defined(CREATIVE_ZENXFISTYLE)
imx233_pinctrl_acquire(1, 12, "backlight_enable");
imx233_pinctrl_set_function(1, 12, PINCTRL_FUNCTION_GPIO);
imx233_pinctrl_enable_gpio(1, 12, true);
imx233_uartdbg_init(BAUD_38400);
#endif
return true;
}
void backlight_hw_on(void)
{
#ifdef HAVE_LCD_ENABLE
lcd_enable(true); /* power on lcd + visible display */
#endif
/* restore the previous backlight level */
backlight_hw_brightness(backlight_brightness);
}
void backlight_hw_off(void)
{
/* there is no real on/off but we can set to 0 brightness */
backlight_hw_brightness(0);
#ifdef HAVE_LCD_ENABLE
lcd_enable(false); /* power off visible display */
#endif
}
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