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 "powermgmt.h"
  27 #include "synaptics-mep.h"
  28
  29 static int int_btn = BUTTON_NONE;
  30 static int old_pos = -1;
  31
  32 void button_init_device(void)
  33 {
  34 }
  35
  36 /*
  37  * Button interrupt handler
  38  */
  39 void button_int(void)
  40 {
  41     char data[4];
  42     int val;
  43
  44     int_btn = BUTTON_NONE;
  45
  46     val = touchpad_read_device(data, 4);
  47
  48     if (data[0] == MEP_BUTTON_HEADER)
  49     {
  50         /* Buttons packet */
  51         if (data[1] & 0x1)
  52             int_btn |= BUTTON_MENU;
  53         if (data[1] & 0x2)
  54             int_btn |= BUTTON_PLAY;
  55         if (data[1] & 0x4)
  56             int_btn |= BUTTON_NEXT;
  57         if (data[1] & 0x8)
  58             int_btn |= BUTTON_PREV;
  59     }
  60     else if (data[0] == MEP_ABSOLUTE_HEADER)
  61     {
  62         if (data[1] & MEP_FINGER)
  63         {
  64             /* Absolute packet - the finger is on the vertical strip.
  65                Position ranges from 1-4095, with 1 at the bottom. */
  66             val = ((data[1] >> 4) << 8) | data[2]; /* position */
  67
  68             int scr_pos = val >> 8; /* split the scrollstrip into 16 regions */
  69             if ((old_pos<scr_pos)&&(old_pos!=-1)) int_btn = BUTTON_DOWN;
  70             if ((old_pos>scr_pos)&&(old_pos!=-1)) int_btn = BUTTON_UP;
  71             old_pos = scr_pos;
  72         }
  73         else old_pos=-1;
  74     }
  75 }
  76
  77 int button_read_device(void)
  78 {
  79     int buttons = int_btn;
  80     unsigned char state;
  81     static bool hold_button = false;
  82     bool hold_button_old;
  83
  84     hold_button_old = hold_button;
  85     hold_button = button_hold();
  86
  87 #ifndef BOOTLOADER
  88     if (hold_button != hold_button_old)
  89     {
  90         backlight_hold_changed(hold_button);
  91     }
  92 #endif
  93
  94     /* device buttons */
  95     if (!hold_button)
  96     {
  97         /* Read Record, OK, C */
  98         state = GPIOA_INPUT_VAL;
  99         if ((state & 0x01)==0) buttons|=BUTTON_REC;
 100         if ((state & 0x40)==0) buttons|=BUTTON_OK;
 101         if ((state & 0x08)==0) buttons|=BUTTON_CANCEL;
 102
 103         /* Read POWER button */
 104         if ((GPIOD_INPUT_VAL & 0x40)==0) buttons|=BUTTON_POWER;
 105
 106         /* Scrollstrip direct button post - much better response */
 107         if ((buttons==BUTTON_UP) || (buttons==BUTTON_DOWN))
 108         {
 109             queue_post(&button_queue,buttons,0);
 110             backlight_on();
 111             buttonlight_on();
 112             reset_poweroff_timer();
 113             buttons = BUTTON_NONE;
 114             int_btn = BUTTON_NONE;
 115         }
 116     }
 117     else return BUTTON_NONE;
 118     return buttons;
 119 }
 120
 121 bool button_hold(void)
 122 {
 123     /* GPIOK 01000000B - HOLD when bit not set */
 124     return (GPIOK_INPUT_VAL & 0x40)?false:true;
 125 }