firmware/target/arm/philips/hdd6330/button-hdd6330.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 /*
  33  * Generate a click sound from the player (not in headphones yet)
  34  * TODO: integrate this with the "key click" option
  35  */
  36 void button_click(void)
  37 {
  38     GPO32_ENABLE |= 0x2000;
  39     GPO32_VAL |= 0x2000;
  40     udelay(1000);
  41     GPO32_VAL &= ~0x2000;
  42 }
  43
  44 #ifndef BOOTLOADER
  45 void button_init_device(void)
  46 {
  47     /* The touchpad is powered on and initialized in power-hdd1630.c
  48        since it needs to be ready for both buttons and button lights. */
  49 }
  50
  51 /*
  52  * Button interrupt handler
  53  */
  54 void button_int(void)
  55 {
  56     char data[4];
  57     int val;
  58
  59     int_btn = BUTTON_NONE;
  60
  61     val = touchpad_read_device(data, 4);
  62
  63     if (val == MEP_BUTTON_HEADER)
  64     {
  65         /* Buttons packet */
  66         if (data[1] & 0x1)
  67             int_btn |= BUTTON_LEFT;
  68         if (data[1] & 0x2)
  69             int_btn |= BUTTON_RIGHT;
  70     }
  71     else if (val == MEP_ABSOLUTE_HEADER)
  72     {
  73         /* Absolute packet - the finger is on the vertical strip.
  74            Position ranges from 1-4095, with 1 at the bottom. */
  75         val = ((data[1] >> 4) << 8) | data[2]; /* position */
  76
  77         if ((val > 0) && (val <= 1365))
  78             int_btn |= BUTTON_DOWN;
  79         else if ((val > 1365) && (val <= 2730))
  80             int_btn |= BUTTON_SELECT;
  81         else if ((val > 2730) && (val <= 4095))
  82             int_btn |= BUTTON_UP;
  83     }
  84 }
  85 #else
  86 void button_init_device(void){}
  87 #endif /* bootloader */
  88
  89 bool button_hold(void)
  90 {
  91     return !(GPIOJ_INPUT_VAL & 0x8);
  92 }
  93
  94 /*
  95  * Get button pressed from hardware
  96  */
  97 int button_read_device(void)
  98 {
  99     static int btn_old = BUTTON_NONE;
 100     int btn = int_btn;
 101
 102     /* Hold */
 103     if(button_hold())
 104         return BUTTON_NONE;
 105
 106     /* Device buttons */
 107     if (!(GPIOA_INPUT_VAL & 0x01)) btn |= BUTTON_MENU;
 108     if (!(GPIOA_INPUT_VAL & 0x02)) btn |= BUTTON_VOL_UP;
 109     if (!(GPIOA_INPUT_VAL & 0x04)) btn |= BUTTON_VOL_DOWN;
 110     if (!(GPIOA_INPUT_VAL & 0x08)) btn |= BUTTON_VIEW;
 111     if (!(GPIOD_INPUT_VAL & 0x20)) btn |= BUTTON_PLAYLIST;
 112     if (!(GPIOD_INPUT_VAL & 0x40)) btn |= BUTTON_POWER;
 113
 114     if ((btn != btn_old) && (btn != BUTTON_NONE))
 115         button_click();
 116
 117     btn_old = btn;
 118
 119     return btn;
 120 }
 121
 122 bool headphones_inserted(void)
 123 {
 124     return (GPIOE_INPUT_VAL & 0x80) ? true : false;
 125 }