firmware/target/arm/sandisk/backlight-c200_e200.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2006 by Barry Wardell
  11  *
  12  * All files in this archive are subject to the GNU General Public License.
  13  * See the file COPYING in the source tree root for full license agreement.
  14  *
  15  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  16  * KIND, either express or implied.
  17  *
  18  ****************************************************************************/
  19 #include "config.h"
  20 #include "backlight-target.h"
  21 #include "system.h"
  22 #include "lcd.h"
  23 #include "backlight.h"
  24 #include "i2c-pp.h"
  25 #include "as3514.h"
  26
  27 static unsigned short backlight_brightness = DEFAULT_BRIGHTNESS_SETTING;
  28
  29 void _backlight_set_brightness(int brightness)
  30 {
  31     backlight_brightness = brightness;
  32
  33     if (brightness > 0)
  34         _backlight_on();
  35     else
  36         _backlight_off();
  37 }
  38
  39 void _backlight_on(void)
  40 {
  41 #ifdef HAVE_LCD_SLEEP
  42     backlight_lcd_sleep_countdown(false); /* stop counter */
  43 #endif
  44 #ifdef HAVE_LCD_ENABLE
  45     lcd_enable(true); /* power on lcd + visible display */
  46 #endif
  47     pp_i2c_send(AS3514_I2C_ADDR, AS3514_DCDC15, backlight_brightness);
  48 }
  49
  50 void _backlight_off(void)
  51 {
  52     pp_i2c_send(AS3514_I2C_ADDR, AS3514_DCDC15, 0x0);
  53 #ifdef HAVE_LCD_ENABLE
  54     lcd_enable(false); /* power off visible display */
  55 #endif
  56 #ifdef HAVE_LCD_SLEEP
  57     backlight_lcd_sleep_countdown(true); /* start countdown */
  58 #endif
  59 }
  60
  61 void _buttonlight_on(void)
  62 {
  63     GPIO_SET_BITWISE(GPIOG_OUTPUT_VAL, 0x80);
  64 #ifdef SANSA_C200
  65     GPIO_SET_BITWISE(GPIOB_OUTPUT_VAL, 0x10); /* The "menu" backlight */
  66 #endif
  67 }
  68
  69 void _buttonlight_off(void)
  70 {
  71     GPIO_CLEAR_BITWISE(GPIOG_OUTPUT_VAL, 0x80);
  72 #ifdef SANSA_C200
  73     GPIO_CLEAR_BITWISE(GPIOB_OUTPUT_VAL, 0x10); /* The "menu" backlight */
  74 #endif
  75 }