firmware/target/arm/as3525/sansa-fuzev2/button-fuzev2.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2010 by Thomas Martitz
  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 "system.h"
  24 #include "button.h"
  25 #include "backlight.h"
  26
  27 /*
  28  * TODO: Scrollwheel!
  29  */
  30
  31 #ifdef HAS_BUTTON_HOLD
  32 static bool hold_button = false;
  33 #endif
  34 void button_init_device(void)
  35 {
  36 }
  37
  38 /*
  39  * Get button pressed from hardware
  40  */
  41
  42 int button_read_device(void)
  43 {
  44     int btn = 0;
  45     volatile int delay;
  46     static bool hold_button_old = false;
  47     static long power_counter = 0;
  48     unsigned gpiod = GPIOD_DATA;
  49     unsigned gpioa_dir = GPIOA_DIR;
  50     unsigned gpiod6;
  51     for(delay = 500; delay; delay--) nop;
  52     CCU_IO &= ~(1<<12);
  53     for(delay=8;delay;delay--) nop;
  54     GPIOB_DIR |= 1<<3;
  55     GPIOB_PIN(3) = 1<<3;
  56     GPIOC_DIR = 0;
  57     GPIOB_DIR &= ~(1<<1);
  58     GPIOB_DIR |= 1<<0;
  59     GPIOB_PIN(0) = 1;
  60     for(delay = 500; delay; delay--)
  61         nop;
  62     gpiod6 = GPIOD_PIN(6);
  63     GPIOB_PIN(0) = 0;
  64     for(delay = 240; delay; delay--)
  65         nop;
  66     GPIOD_DIR = 0xff;
  67     GPIOA_DIR &= ~(1<<6|1<<7);
  68     GPIOD_DATA = 0;
  69     GPIOD_DIR = 0;
  70     if (GPIOC_PIN(1) & 1<<1)
  71         btn |= BUTTON_DOWN;
  72     if (GPIOC_PIN(2) & 1<<2)
  73         btn |= BUTTON_UP;
  74     if (GPIOC_PIN(3) & 1<<3)
  75         btn |= BUTTON_LEFT;
  76     if (GPIOC_PIN(4) & 1<<4)
  77         btn |= BUTTON_SELECT;
  78     if (GPIOC_PIN(5) & 1<<5)
  79         btn |= BUTTON_RIGHT;
  80     if (GPIOB_PIN(1) & 1<<1)
  81         btn |= BUTTON_HOME;
  82     if (gpiod6 & 1<<6)
  83     {   /* power/hold is on the same pin. we know it's hold if the bit isn't
  84          * set now anymore */
  85         if (GPIOD_PIN(6) & 1<<6)
  86         {
  87             hold_button = false;
  88             btn |= BUTTON_POWER;
  89         }
  90         else
  91         {
  92             hold_button = true;
  93         }
  94     }
  95
  96     GPIOD_DIR = 0xff;
  97     GPIOD_DATA = gpiod;
  98     GPIOA_DIR = gpioa_dir;
  99     GPIOD_DIR = 0;
 100     CCU_IO |= 1<<12;
 101 #ifdef HAS_BUTTON_HOLD
 102     /* light handling */
 103     if (hold_button != hold_button_old)
 104     {
 105         hold_button_old = hold_button;
 106         backlight_hold_changed(hold_button);
 107     }
 108     if (hold_button)
 109     {
 110         power_counter = HZ;
 111         return 0;
 112     }
 113     /* read power, but not if hold button was just released, since
 114      * you basically always hit power due to the slider mechanism after releasing
 115      * (fuze only)
 116      */
 117     else if (power_counter > 0)
 118     {
 119         power_counter--;
 120         btn &= ~BUTTON_POWER;
 121     }
 122 #endif
 123     return btn;
 124 }
 125
 126 #ifdef HAS_BUTTON_HOLD
 127 bool button_hold(void)
 128 {
 129     return hold_button;
 130 }
 131 #endif