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 extern void scrollwheel(unsigned wheel_value);
  28
  29 #ifdef HAS_BUTTON_HOLD
  30 static bool hold_button = false;
  31 #endif
  32 void button_init_device(void)
  33 {   /* activate the wheel */
  34     volatile int i;
  35     GPIOB_DIR |= 1<<4;
  36     for(i = 20; i; i--) nop;
  37     GPIOB_PIN(4) = 0x10;
  38 }
  39
  40 unsigned read_GPIOA_67(void)
  41 {
  42     unsigned ret = 0;
  43     volatile int i;
  44     DBOP_CTRL |= 1<<19;
  45     for(i = 20; i; i--) nop;
  46     GPIOA_DIR &= ~0xc0;
  47     for(i = 20; i; i--) nop;
  48     if (GPIOA_PIN(6) != 0)
  49         ret = 1<<0;
  50     for(i = 20; i; i--) nop;
  51     if (GPIOA_PIN(7) != 0)
  52         ret |= 1<<1;
  53     DBOP_CTRL &= ~(1<<19);
  54     for(i = 20; i; i--) nop;
  55     return ret;
  56 }
  57
  58 void get_scrollwheel(void)
  59 {
  60 #if defined(HAVE_SCROLLWHEEL) && !defined(BOOTLOADER)
  61     /* scroll wheel handling */
  62     scrollwheel(read_GPIOA_67());
  63 #endif
  64 }
  65
  66 /*
  67  * Get button pressed from hardware
  68  */
  69
  70
  71 int button_read_device(void)
  72 {
  73     int btn = 0;
  74     volatile int delay;
  75     static bool hold_button_old = false;
  76     static long power_counter = 0;
  77     unsigned gpiod = GPIOD_DATA;
  78     unsigned gpioa_dir = GPIOA_DIR;
  79     unsigned gpiod6;
  80     get_scrollwheel();
  81     for(delay = 500; delay; delay--) nop;
  82     CCU_IO &= ~(1<<12);
  83     for(delay=8;delay;delay--) nop;
  84     GPIOB_DIR |= 1<<3;
  85     GPIOB_PIN(3) = 1<<3;
  86     GPIOC_DIR = 0;
  87     GPIOB_DIR &= ~(1<<1);
  88     GPIOB_DIR |= 1<<0;
  89     GPIOB_PIN(0) = 1;
  90     for(delay = 500; delay; delay--)
  91         nop;
  92     gpiod6 = GPIOD_PIN(6);
  93     GPIOB_PIN(0) = 0;
  94     for(delay = 240; delay; delay--)
  95         nop;
  96     GPIOD_DIR = 0xff;
  97     GPIOA_DIR &= ~(1<<6|1<<7);
  98     GPIOD_DATA = 0;
  99     GPIOD_DIR = 0;
 100     if (GPIOC_PIN(1) & 1<<1)
 101         btn |= BUTTON_DOWN;
 102     if (GPIOC_PIN(2) & 1<<2)
 103         btn |= BUTTON_UP;
 104     if (GPIOC_PIN(3) & 1<<3)
 105         btn |= BUTTON_LEFT;
 106     if (GPIOC_PIN(4) & 1<<4)
 107         btn |= BUTTON_SELECT;
 108     if (GPIOC_PIN(5) & 1<<5)
 109         btn |= BUTTON_RIGHT;
 110     if (GPIOB_PIN(1) & 1<<1)
 111         btn |= BUTTON_HOME;
 112     if (gpiod6 & 1<<6)
 113     {   /* power/hold is on the same pin. we know it's hold if the bit isn't
 114          * set now anymore */
 115         if (GPIOD_PIN(6) & 1<<6)
 116         {
 117             hold_button = false;
 118             btn |= BUTTON_POWER;
 119         }
 120         else
 121         {
 122             hold_button = true;
 123         }
 124     }
 125
 126     GPIOD_DIR = 0xff;
 127     GPIOD_DATA = gpiod;
 128     GPIOA_DIR = gpioa_dir;
 129     GPIOD_DIR = 0;
 130     CCU_IO |= 1<<12;
 131 #ifdef HAS_BUTTON_HOLD
 132 #ifndef BOOTLOADER
 133     /* light handling */
 134     if (hold_button != hold_button_old)
 135     {
 136         hold_button_old = hold_button;
 137         backlight_hold_changed(hold_button);
 138     }
 139 #else
 140     (void)hold_button_old;
 141 #endif
 142     if (hold_button)
 143     {
 144         power_counter = HZ;
 145         return 0;
 146     }
 147     /* read power, but not if hold button was just released, since
 148      * you basically always hit power due to the slider mechanism after releasing
 149      * (fuze only)
 150      */
 151     else if (power_counter > 0)
 152     {
 153         power_counter--;
 154         btn &= ~BUTTON_POWER;
 155     }
 156 #endif
 157     return btn;
 158 }
 159
 160 #ifdef HAS_BUTTON_HOLD
 161 bool button_hold(void)
 162 {
 163     return hold_button;
 164 }
 165 #endif