Marcin Bukat | 28d54c6 | 2010-04-26 21:40:16 +0000 | [diff] [blame] | 1 | /*************************************************************************** |
| 2 | * __________ __ ___. |
| 3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| 4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| 5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| 6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| 7 | * \/ \/ \/ \/ \/ |
Marcin Bukat | 082c7d3 | 2010-10-22 12:28:43 +0000 | [diff] [blame^] | 8 | * $Id$ |
Marcin Bukat | 28d54c6 | 2010-04-26 21:40:16 +0000 | [diff] [blame] | 9 | * |
| 10 | * Copyright (C) 2010 Marcin Bukat |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or |
| 13 | * modify it under the terms of the GNU General Public License |
| 14 | * as published by the Free Software Foundation; either version 2 |
| 15 | * of the License, or (at your option) any later version. |
| 16 | * |
| 17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| 18 | * KIND, either express or implied. |
| 19 | * |
| 20 | ****************************************************************************/ |
| 21 | |
| 22 | #include "config.h" |
| 23 | #include "cpu.h" |
| 24 | #include "kernel.h" |
| 25 | #include "system.h" |
| 26 | #include "backlight.h" |
| 27 | #include "backlight-target.h" |
| 28 | #include "lcd.h" |
| 29 | |
Marcin Bukat | 572ac53 | 2010-04-30 13:59:00 +0000 | [diff] [blame] | 30 | static bool _backlight_on = true; |
Marcin Bukat | 28d54c6 | 2010-04-26 21:40:16 +0000 | [diff] [blame] | 31 | static int _brightness = DEFAULT_BRIGHTNESS_SETTING; |
| 32 | |
| 33 | /* Returns the current state of the backlight (true=ON, false=OFF). */ |
| 34 | bool _backlight_init(void) |
| 35 | { |
Marcin Bukat | 572ac53 | 2010-04-30 13:59:00 +0000 | [diff] [blame] | 36 | #ifdef BOOTLOADER |
Marcin Bukat | 28d54c6 | 2010-04-26 21:40:16 +0000 | [diff] [blame] | 37 | and_l(~(1<<28),&GPIO_OUT); |
Marcin Bukat | 572ac53 | 2010-04-30 13:59:00 +0000 | [diff] [blame] | 38 | #endif |
Marcin Bukat | 28d54c6 | 2010-04-26 21:40:16 +0000 | [diff] [blame] | 39 | or_l((1<<28),&GPIO_FUNCTION); |
| 40 | or_l((1<<28),&GPIO_ENABLE); |
| 41 | return true; |
| 42 | } |
| 43 | |
| 44 | void _backlight_hw_on(void) |
| 45 | { |
Marcin Bukat | 5ad4d13 | 2010-05-04 11:14:59 +0000 | [diff] [blame] | 46 | #ifndef BOOTLOADER |
Marcin Bukat | 28d54c6 | 2010-04-26 21:40:16 +0000 | [diff] [blame] | 47 | if (_backlight_on) |
| 48 | return; |
Marcin Bukat | 5ad4d13 | 2010-05-04 11:14:59 +0000 | [diff] [blame] | 49 | #endif |
Marcin Bukat | 28d54c6 | 2010-04-26 21:40:16 +0000 | [diff] [blame] | 50 | |
| 51 | _backlight_set_brightness(_brightness); |
| 52 | _backlight_on = true; |
| 53 | |
| 54 | } |
| 55 | |
| 56 | void _backlight_hw_off(void) |
| 57 | { |
| 58 | /* GPIO28 low */ |
| 59 | and_l(~(1<<28),&GPIO_OUT); |
| 60 | _backlight_on = false; |
| 61 | } |
| 62 | |
| 63 | void _backlight_set_brightness(int val) |
| 64 | { |
| 65 | unsigned char i; |
| 66 | |
Marcin Bukat | 5ad4d13 | 2010-05-04 11:14:59 +0000 | [diff] [blame] | 67 | #ifndef BOOTLOADER |
Marcin Bukat | 572ac53 | 2010-04-30 13:59:00 +0000 | [diff] [blame] | 68 | if( _brightness == val && _backlight_on == true ) |
| 69 | return; |
Marcin Bukat | 5ad4d13 | 2010-05-04 11:14:59 +0000 | [diff] [blame] | 70 | #endif |
Marcin Bukat | 572ac53 | 2010-04-30 13:59:00 +0000 | [diff] [blame] | 71 | |
Marcin Bukat | 28d54c6 | 2010-04-26 21:40:16 +0000 | [diff] [blame] | 72 | and_l(~(1<<28),&GPIO_OUT); |
| 73 | sleep(4); |
| 74 | |
| 75 | for (i=0;i<val;i++) |
| 76 | { |
| 77 | or_l((1<<28),&GPIO_OUT); |
| 78 | and_l(~(1<<28),&GPIO_OUT); |
| 79 | } |
| 80 | |
| 81 | or_l((1<<28),&GPIO_OUT); |
| 82 | |
| 83 | _brightness = val; |
| 84 | } |
| 85 | |
| 86 | void _remote_backlight_on(void) |
| 87 | { |
| 88 | /* I don't have remote to play with */ |
| 89 | } |
| 90 | |
| 91 | void _remote_backlight_off(void) |
| 92 | { |
| 93 | /* I don't have remote to play with */ |
| 94 | } |