firmware/target/arm/iriver/h10/button-h10.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2006 by Barry Wardell
  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 /* Custom written for the H10 based on analysis of the GPIO data */
  23
  24
  25 #include <stdlib.h>
  26 #include "config.h"
  27 #include "cpu.h"
  28 #include "system.h"
  29 #include "button.h"
  30 #include "kernel.h"
  31 #include "backlight.h"
  32 #include "adc.h"
  33
  34
  35 void button_init_device(void)
  36 {
  37     /* Enable REW, FF, Play, Left, Right, Hold buttons */
  38     GPIO_SET_BITWISE(GPIOA_ENABLE, 0xfc);
  39
  40     /* Enable POWER button */
  41     GPIO_SET_BITWISE(GPIOB_ENABLE, 0x01);
  42
  43     /* We need to output to pin 6 of GPIOD when reading the scroll pad value */
  44     GPIO_SET_BITWISE(GPIOD_ENABLE, 0x40);
  45     GPIO_SET_BITWISE(GPIOD_OUTPUT_EN, 0x40);
  46     GPIO_SET_BITWISE(GPIOD_OUTPUT_VAL, 0x40);
  47 }
  48
  49 bool button_hold(void)
  50 {
  51     return (GPIOA_INPUT_VAL & 0x4)?false:true;
  52 }
  53
  54 bool remote_button_hold(void)
  55 {
  56     return adc_scan(ADC_REMOTE) < 0x2B;
  57 }
  58
  59 /*
  60  * Get button pressed from hardware
  61  */
  62 int button_read_device(void)
  63 {
  64     int btn = BUTTON_NONE;
  65     int data;
  66     unsigned char state;
  67     static bool hold_button = false;
  68     static bool remote_hold_button = false;
  69     bool hold_button_old;
  70     bool remote_hold_button_old;
  71
  72     /* Hold */
  73     hold_button_old = hold_button;
  74     hold_button = button_hold();
  75
  76 #ifndef BOOTLOADER
  77     /* light handling */
  78     if (hold_button != hold_button_old)
  79     {
  80         backlight_hold_changed(hold_button);
  81     }
  82 #endif
  83
  84     /* device buttons */
  85     if (!hold_button)
  86     {
  87         /* Read normal buttons */
  88         state = GPIOA_INPUT_VAL & 0xf8;
  89         if ((state & 0x8) == 0) btn |= BUTTON_FF;
  90         if ((state & 0x10) == 0) btn |= BUTTON_PLAY;
  91         if ((state & 0x20) == 0) btn |= BUTTON_REW;
  92         if ((state & 0x40) == 0) btn |= BUTTON_RIGHT;
  93         if ((state & 0x80) == 0) btn |= BUTTON_LEFT;
  94
  95         /* Read power button */
  96         if (GPIOB_INPUT_VAL & 0x1) btn |= BUTTON_POWER;
  97
  98         /* Read scroller */
  99         if ( GPIOD_INPUT_VAL & 0x20 )
 100         {
 101             GPIO_CLEAR_BITWISE(GPIOD_OUTPUT_VAL, 0x40);
 102             udelay(250);
 103             data = adc_scan(ADC_SCROLLPAD);
 104             GPIO_SET_BITWISE(GPIOD_OUTPUT_VAL, 0x40);
 105
 106             if(data < 0x224)
 107             {
 108                 btn |= BUTTON_SCROLL_DOWN;
 109             } else {
 110                 btn |= BUTTON_SCROLL_UP;
 111             }
 112         }
 113     }
 114
 115     /* remote buttons */
 116     remote_hold_button_old = remote_hold_button;
 117
 118     data = adc_scan(ADC_REMOTE);
 119     remote_hold_button = data < 0x2B;
 120
 121 #ifndef BOOTLOADER
 122     if (remote_hold_button != remote_hold_button_old)
 123         backlight_hold_changed(remote_hold_button);
 124 #endif
 125
 126     if(!remote_hold_button)
 127     {
 128         if (data < 0x3FF)
 129         {
 130             if(data < 0x204)
 131                 if(data < 0x155)
 132                     btn |= BUTTON_RC_FF;
 133                 else
 134                     btn |= BUTTON_RC_REW;
 135             else
 136                 if(data < 0x2D0)
 137                    btn |= BUTTON_RC_VOL_DOWN;
 138                 else
 139                     btn |= BUTTON_RC_VOL_UP;
 140         }
 141     }
 142
 143     /* remote play button should be dead if hold */
 144     if (!remote_hold_button && !(GPIOA_INPUT_VAL & 0x1))
 145         btn |= BUTTON_RC_PLAY;
 146
 147     return btn;
 148 }