firmware/target/arm/philips/sa9200/button-sa9200.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2008 by Mark Arigo
  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 "system.h"
  23 #include "button.h"
  24 #include "backlight.h"
  25 #include "synaptics-mep.h"
  26
  27 /*#define LOGF_ENABLE*/
  28 #include "logf.h"
  29
  30 static int int_btn = BUTTON_NONE;
  31
  32 #ifndef BOOTLOADER
  33 static bool hold_button_old = false;
  34
  35 void button_init_device(void)
  36 {
  37     /* The touchpad is powered on and initialized in power-sa9200.c
  38        since it needs to be ready for both buttons and button lights. */
  39 }
  40
  41 /*
  42  * Button interrupt handler
  43  */
  44 void button_int(void)
  45 {
  46     char data[4];
  47     int val;
  48
  49     int_btn = BUTTON_NONE;
  50
  51     val = touchpad_read_device(data, 4);
  52
  53     if (val == MEP_BUTTON_HEADER)
  54     {
  55         /* Buttons packet */
  56         if (data[1] & 0x1) int_btn |= BUTTON_RIGHT;
  57         if (data[1] & 0x2) int_btn |= BUTTON_NEXT;
  58         if (data[1] & 0x4) int_btn |= BUTTON_PREV;
  59         if (data[1] & 0x8) int_btn |= BUTTON_LEFT;
  60         if (data[2] & 0x1) int_btn |= BUTTON_MENU;
  61     }
  62     else if (val == MEP_ABSOLUTE_HEADER)
  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         if ((val > 0) && (val <= 1365))
  69             int_btn |= BUTTON_DOWN;
  70         else if ((val > 1365) && (val <= 2730))
  71             int_btn |= BUTTON_PLAY;
  72         else if ((val > 2730) && (val <= 4095))
  73             int_btn |= BUTTON_UP;
  74     }
  75 }
  76 #else
  77 void button_init_device(void)
  78 {
  79 }
  80 #endif /* BOOTLOADER */
  81
  82 bool button_hold(void)
  83 {
  84     return !(GPIOL_INPUT_VAL & 0x40);
  85 }
  86
  87 /*
  88  * Get button pressed from hardware
  89  */
  90 int button_read_device(void)
  91 {
  92     int btn = int_btn;
  93     bool hold = !(GPIOL_INPUT_VAL & 0x40);
  94
  95 #ifndef BOOTLOADER
  96     /* Backlight hold handling */
  97     if (hold != hold_button_old)
  98     {
  99         hold_button_old = hold;
 100         backlight_hold_changed(hold);
 101     }
 102 #endif
 103
 104     if (hold)
 105         return BUTTON_NONE;
 106
 107     if (!(GPIOB_INPUT_VAL & 0x20)) btn |= BUTTON_POWER;
 108     if (!(GPIOF_INPUT_VAL & 0x10)) btn |= BUTTON_VOL_UP;
 109     if (!(GPIOF_INPUT_VAL & 0x04)) btn |= BUTTON_VOL_DOWN;
 110
 111     return btn;
 112 }
 113
 114 bool headphones_inserted(void)
 115 {
 116     return (GPIOB_INPUT_VAL & 0x10) ? false : true;
 117 }