/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2006 by Linus Nielsen Feltzing * * All files in this archive are subject to the GNU General Public License. * See the file COPYING in the source tree root for full license agreement. * * 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_init(void) { _backlight_set_brightness(DEFAULT_BRIGHTNESS_SETTING); _backlight_on(); return true; /* Backlight always ON after boot. */ } void _backlight_on(void) { int level; #ifdef HAVE_LCD_SLEEP backlight_lcd_sleep_countdown(false); /* stop counter */ #endif #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_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 #ifdef HAVE_LCD_SLEEP backlight_lcd_sleep_countdown(true); /* start countdown */ #endif } /* set brightness by changing the PWM */ void _backlight_set_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_on(void) { and_l(~0x00200000, &GPIO_OUT); } void _remote_backlight_off(void) { or_l(0x00200000, &GPIO_OUT); }