firmware/target/arm/pbell/vibe500/button-vibe500.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id:$
   9  *
  10  * Copyright (C) 2009 Szymon Dziok
  11  * Based on the Iriver H10 and the Philips HD1630 code
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License
  15  * as published by the Free Software Foundation; either version 2
  16  * of the License, or (at your option) any later version.
  17  *
  18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  19  * KIND, either express or implied.
  20  *
  21  ****************************************************************************/
  22
  23 #include "system.h"
  24 #include "button.h"
  25 #include "backlight.h"
  26 #include "synaptics-mep.h"
  27
  28 static int int_btn = BUTTON_NONE;
  29 static int old_pos = -1;
  30
  31 void button_init_device(void)
  32 {
  33 }
  34
  35 /*
  36  * Button interrupt handler
  37  */
  38 void button_int(void)
  39 {
  40     char data[4];
  41     int val;
  42
  43     int_btn = BUTTON_NONE;
  44
  45     val = touchpad_read_device(data, 4);
  46
  47     if (val == MEP_BUTTON_HEADER)
  48     {
  49         /* Buttons packet */
  50         if (data[1] & 0x1)
  51             int_btn |= BUTTON_MENU;
  52         if (data[1] & 0x2)
  53             int_btn |= BUTTON_PLAY;
  54         if (data[1] & 0x4)
  55             int_btn |= BUTTON_NEXT;
  56         if (data[1] & 0x8)
  57             int_btn |= BUTTON_PREV;
  58     }
  59     else if (val == MEP_ABSOLUTE_HEADER)
  60     {
  61         /* Absolute packet - the finger is on the vertical strip.
  62            Position ranges from 1-4095, with 1 at the bottom. */
  63         val = ((data[1] >> 4) << 8) | data[2]; /* position */
  64
  65         if (val > 0)
  66         {
  67             int scr_pos = val >> 8; /* split the scrollstrip into 16 regions */
  68             if ((old_pos<scr_pos)&&(old_pos!=-1)) int_btn = BUTTON_DOWN;
  69             if ((old_pos>scr_pos)&&(old_pos!=-1)) int_btn = BUTTON_UP;
  70             old_pos = scr_pos;
  71         }
  72         else old_pos=-1;
  73     }
  74 }
  75
  76 int button_read_device(void)
  77 {
  78     int buttons = int_btn;
  79     unsigned char state;
  80     static bool hold_button = false;
  81     bool hold_button_old;
  82
  83     hold_button_old = hold_button;
  84     hold_button = button_hold();
  85
  86 #ifndef BOOTLOADER
  87     if (hold_button != hold_button_old)
  88     {
  89         backlight_hold_changed(hold_button);
  90     }
  91 #endif
  92
  93     /* device buttons */
  94     if (!hold_button)
  95     {
  96         /* Read Record, OK, C */
  97         state = GPIOA_INPUT_VAL;
  98         if ((state & 0x01)==0) buttons|=BUTTON_REC;
  99         if ((state & 0x40)==0) buttons|=BUTTON_OK;
 100         if ((state & 0x08)==0) buttons|=BUTTON_CANCEL;
 101
 102         /* Read POWER button */
 103         if ((GPIOD_INPUT_VAL & 0x40)==0) buttons|=BUTTON_POWER;
 104     }
 105     else return BUTTON_NONE;
 106     return buttons;
 107 }
 108
 109 bool button_hold(void)
 110 {
 111     /* GPIOK 01000000B - HOLD when bit not set */
 112     return (GPIOK_INPUT_VAL & 0x40)?false:true;
 113 }
 114