| /*************************************************************************** |
| * __________ __ ___. |
| * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| * \/ \/ \/ \/ \/ |
| * $Id$ |
| * |
| * Copyright (C) 2008 by Mark Arigo |
| * |
| * 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-target.h" |
| |
| #define MIN_BRIGHTNESS 0x80ff08ff |
| |
| static const int log_brightness[12] = {0,4,8,12,20,28,40,60,88,124,176,255}; |
| |
| /* Returns the current state of the backlight (true=ON, false=OFF). */ |
| bool _backlight_init(void) |
| { |
| return (GPO32_ENABLE & 0x1000000) ? true : false; |
| } |
| |
| void _backlight_hw_on(void) |
| { |
| GPO32_ENABLE |= 0x1000000; |
| } |
| |
| void _backlight_hw_off(void) |
| { |
| GPO32_ENABLE &= ~0x1000000; |
| } |
| |
| void _buttonlight_set_brightness(int brightness) |
| { |
| /* clamp the brightness value */ |
| brightness = MAX(0, MIN(15, brightness)); |
| |
| outl(MIN_BRIGHTNESS-(log_brightness[brightness - 1] << 16), 0x7000a010); |
| } |
| |
| void _buttonlight_on(void) |
| { |
| /* turn on all touchpad leds */ |
| GPIOA_OUTPUT_VAL |= BUTTONLIGHT_ALL; |
| } |
| |
| void _buttonlight_off(void) |
| { |
| /* turn off all touchpad leds */ |
| GPIOA_OUTPUT_VAL &= ~BUTTONLIGHT_ALL; |
| } |