firmware/target/arm/philips/sa9200/backlight-sa9200.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2006 by Barry Wardell
  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 #include "config.h"
  22 #include "backlight-target.h"
  23 #include "system.h"
  24 #include "lcd.h"
  25 #include "backlight.h"
  26 #include "i2c-pp.h"
  27 #include "as3514.h"
  28
  29 static unsigned short backlight_brightness = DEFAULT_BRIGHTNESS_SETTING;
  30
  31 void _backlight_set_brightness(int brightness)
  32 {
  33     backlight_brightness = brightness;
  34
  35     if (brightness > 0)
  36         _backlight_on();
  37     else
  38         _backlight_off();
  39 }
  40
  41 void _backlight_on(void)
  42 {
  43 #ifdef HAVE_LCD_SLEEP
  44     backlight_lcd_sleep_countdown(false); /* stop counter */
  45 #endif
  46 #ifdef HAVE_LCD_ENABLE
  47     lcd_enable(true); /* power on lcd + visible display */
  48 #endif
  49     pp_i2c_send(AS3514_I2C_ADDR, AS3514_DCDC15, backlight_brightness);
  50 }
  51
  52 void _backlight_off(void)
  53 {
  54     pp_i2c_send(AS3514_I2C_ADDR, AS3514_DCDC15, 0x0);
  55 #ifdef HAVE_LCD_ENABLE
  56     lcd_enable(false); /* power off visible display */
  57 #endif
  58 #ifdef HAVE_LCD_SLEEP
  59     backlight_lcd_sleep_countdown(true); /* start countdown */
  60 #endif
  61 }
  62
  63 void _buttonlight_on(void)
  64 {
  65     GPIO_SET_BITWISE(GPIOG_OUTPUT_VAL, 0x80);
  66 #ifdef SANSA_C200
  67     GPIO_SET_BITWISE(GPIOB_OUTPUT_VAL, 0x10); /* The "menu" backlight */
  68 #endif
  69 }
  70
  71 void _buttonlight_off(void)
  72 {
  73     GPIO_CLEAR_BITWISE(GPIOG_OUTPUT_VAL, 0x80);
  74 #ifdef SANSA_C200
  75     GPIO_CLEAR_BITWISE(GPIOB_OUTPUT_VAL, 0x10); /* The "menu" backlight */
  76 #endif
  77 }