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 "powermgmt.h"
  26 #include "synaptics-mep.h"
  27
  28 /*#define LOGF_ENABLE*/
  29 #include "logf.h"
  30
  31 static int int_btn = BUTTON_NONE;
  32 static int old_pos = -1;
  33
  34 static int scroll_repeat = BUTTON_NONE;
  35 static int repeat = 0;
  36
  37 /*
  38  * Generate a click sound from the player (not in headphones yet)
  39  * TODO: integrate this with the "key click" option
  40  */
  41 void button_click(void)
  42 {
  43     GPO32_ENABLE |= 0x2000;
  44     GPO32_VAL |= 0x2000;
  45     udelay(1000);
  46     GPO32_VAL &= ~0x2000;
  47 }
  48
  49 #ifndef BOOTLOADER
  50 void button_init_device(void)
  51 {
  52     /* The touchpad is powered on and initialized in power-hdd1630.c
  53        since it needs to be ready for both buttons and button lights. */
  54 }
  55
  56 /*
  57  * Button interrupt handler
  58  */
  59 void button_int(void)
  60 {
  61     char data[4];
  62     int val;
  63
  64     int_btn = BUTTON_NONE;
  65
  66     val = touchpad_read_device(data, 4);
  67
  68     if (data[0] == MEP_BUTTON_HEADER)
  69     {
  70         /* Buttons packet */
  71         if (data[1] & 0x1)
  72             int_btn |= BUTTON_LEFT;
  73         if (data[1] & 0x2)
  74             int_btn |= BUTTON_MENU;
  75         if (data[1] & 0x4)
  76             int_btn |= BUTTON_RIGHT;
  77         if (data[1] & 0x8)
  78             int_btn |= BUTTON_VIEW;
  79     }
  80     else if ((data[0] == MEP_ABSOLUTE_HEADER))
  81     {
  82         if (data[1] & MEP_FINGER)
  83         {
  84             /* Absolute packet - the finger is on the horizontal strip.
  85                 Position ranges from 1-4095, with 1 at the bottom. */
  86             val = ((data[1] >> 4) << 8) | data[2]; /* position */
  87
  88             /* The HDD63x0 actually has 2 scrollbars. One vertical and one horizontal
  89             (where the prev, play, and next buttons are). Because of that, we need to know
  90             which sensor is reporting data. */
  91             if ((data[3] >> 6) == 1) /* index = 1 */
  92             {
  93                 if ((val > 0) && (val <= 1365))
  94                     int_btn |= BUTTON_PREV;
  95                 else if ((val > 1365) && (val <= 2730))
  96                     int_btn |= BUTTON_PLAY;
  97                 else if ((val > 2730) && (val <= 4095))
  98                     int_btn |= BUTTON_NEXT;
  99             } else
 100             {
 101                 int scr_pos = val >> 8; /* split the scrollstrip into 16 regions */
 102                 if ((old_pos<scr_pos)&&(old_pos!=-1)) int_btn = BUTTON_UP;
 103                 if ((old_pos>scr_pos)&&(old_pos!=-1)) int_btn = BUTTON_DOWN;
 104
 105                 old_pos = scr_pos;
 106
 107                 /* repeat button */
 108                 repeat = 0;
 109                 if (int_btn != BUTTON_NONE)
 110                 {
 111                     if (int_btn != scroll_repeat)
 112                         scroll_repeat = int_btn;
 113                     else repeat = BUTTON_REPEAT;
 114                 }
 115             }
 116         }
 117         else
 118         {
 119             old_pos = -1;
 120             scroll_repeat = BUTTON_NONE;
 121         }
 122     }
 123 }
 124 #else
 125 void button_init_device(void){}
 126 #endif /* bootloader */
 127
 128 bool button_hold(void)
 129 {
 130     return !(GPIOJ_INPUT_VAL & 0x8);
 131 }
 132
 133 /*
 134  * Get button pressed from hardware
 135  */
 136 int button_read_device(void)
 137 {
 138     static int btn_old = BUTTON_NONE;
 139     int btn = int_btn;
 140
 141     /* Hold */
 142     if(button_hold())
 143         return BUTTON_NONE;
 144
 145     /* Device buttons */
 146     if (!(GPIOA_INPUT_VAL & 0x02)) btn |= BUTTON_VOL_UP;
 147     if (!(GPIOA_INPUT_VAL & 0x04)) btn |= BUTTON_VOL_DOWN;
 148     if (!(GPIOD_INPUT_VAL & 0x40)) btn |= BUTTON_POWER;
 149
 150     /* Scrollstrip direct button post - much better response */
 151     if ((btn == BUTTON_UP) || (btn == BUTTON_DOWN))
 152     {
 153         queue_post(&button_queue,btn|repeat,0);
 154         backlight_on();
 155         buttonlight_on();
 156         reset_poweroff_timer();
 157
 158         int_btn = BUTTON_NONE;
 159         repeat = BUTTON_NONE;
 160         btn = BUTTON_NONE;
 161     }
 162
 163     if ((btn != btn_old) && (btn != BUTTON_NONE))
 164         button_click();
 165
 166     btn_old = btn;
 167
 168     return btn;
 169 }
 170
 171 bool headphones_inserted(void)
 172 {
 173     return (GPIOE_INPUT_VAL & 0x80) ? true : false;
 174 }