firmware/target/arm/ipod/backlight-4g_color.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2002 by Linus Nielsen Feltzing
  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 <stdlib.h>
  23 #include "cpu.h"
  24 #include "kernel.h"
  25 #include "thread.h"
  26 #include "i2c.h"
  27 #include "debug.h"
  28 #include "rtc.h"
  29 #include "usb.h"
  30 #include "power.h"
  31 #include "system.h"
  32 #include "button.h"
  33 #include "timer.h"
  34 #include "backlight.h"
  35 #include "backlight-target.h"
  36
  37 void _backlight_on(void)
  38 {
  39     /* brightness full */
  40     outl(0x80000000 | (0xff << 16), 0x7000a010);
  41
  42     /* set port b bit 3 on */
  43     GPIO_SET_BITWISE(GPIOB_OUTPUT_VAL, 0x08);
  44 }
  45
  46 void _backlight_off(void)
  47 {
  48     /* fades backlight off on 4g */
  49     GPO32_ENABLE &= ~0x2000000;
  50     outl(0x80000000, 0x7000a010);
  51 }
  52
  53 bool _backlight_init(void)
  54 {
  55     GPIOB_ENABLE |= 0x4; /* B02 enable */
  56     GPIOB_ENABLE |= 0x8; /* B03 enable */
  57     GPO32_ENABLE |= 0x2000000; /* D01 enable */
  58     GPO32_VAL |= 0x2000000;  /* D01 =1 */
  59     DEV_EN |= DEV_PWM;   /* PWM enable */
  60
  61     _backlight_on();
  62     return true;
  63 }