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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Linus Nielsen Feltzing
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "cpu.h"
#include "system.h"
#include "button.h"
#include "kernel.h"
#include "backlight.h"
#include "adc.h"
#include "backlight-target.h"
static bool headphones_detect;
static bool hold_button = false;
#define TOUCHPAD_SENS_NORMAL ((1 << 12) | /* right++ */ \
(1 << 7) | /* left++ */ \
(1 << 6) | /* down++*/ \
(1 << 0) | /* up++ */ \
(1 << 3)) /* center */
#define TOUCHPAD_SENS_HIGH (((1 << 12) | (1 << 11)) | /* right++, right+ */ \
((1 << 8) | (1 << 7)) | /* left+, left++ */ \
((1 << 6) | (1 << 5)) | /* down++, down+ */ \
((1 << 1) | (1 << 0)) | /* up+, up++ */ \
(1 << 3)) /* Center */
static int touchpad_mask = TOUCHPAD_SENS_NORMAL;
static int const remote_buttons[] =
{
BUTTON_NONE, /* Headphones connected - remote disconnected */
BUTTON_RC_PLAY,
BUTTON_RC_DSP,
BUTTON_RC_REW,
BUTTON_RC_FF,
BUTTON_RC_VOL_UP,
BUTTON_RC_VOL_DOWN,
BUTTON_NONE, /* Remote control attached - no buttons pressed */
BUTTON_NONE, /* Nothing in the headphone socket */
};
void button_init_device(void)
{
/* Some button inputs need the internal pullups disabled to function */
GPGUP|=0x031F;
GPJUP|=0x1FFF;
}
inline bool button_hold(void)
{
return (GPGDAT & (1 << 15));
}
int button_read_device(void)
{
int touchpad;
int buttons;
static int lastbutton;
unsigned short remote_adc;
int btn = BUTTON_NONE;
bool hold_button_old;
/* normal buttons */
hold_button_old = hold_button;
hold_button = button_hold();
#ifndef BOOTLOADER
/* give BL notice if HB state chaged */
if (hold_button != hold_button_old)
backlight_hold_changed(hold_button);
#endif
/* See header for ADC values when remote control buttons are pressed */
/* Only one button can be sensed at a time on the remote. */
/* Need to filter the remote button because the ADC is so fast */
remote_adc = adc_read(ADC_HPREMOTE);
if (remote_adc != ADC_READ_ERROR)
{
/* If there is nothing in the headphone socket, the ADC reads high */
if (remote_adc < 940)
headphones_detect = true;
else
headphones_detect = false;
}
btn = remote_buttons[(remote_adc + 64) / 128];
if (btn != lastbutton)
{
/* if the buttons dont agree twice in a row, then its none */
lastbutton = btn;
btn = BUTTON_NONE;
buttonlight_on();
}
/* Check for hold first - exit if asserted with no button pressed */
if (hold_button)
return btn;
/* the side buttons - Check before doing all of the work on each bit */
buttons = GPGDAT & 0x1F;
if (buttons)
{
btn |= buttons;
buttonlight_on();
}
/* the touchpad - only watch the lines we actually read */
touchpad = GPJDAT & touchpad_mask;
if (touchpad)
{
if (touchpad & (1 << 3))
{
btn |= BUTTON_SELECT;
/* Desensitize all but outer detectors and still allow a combo if
* that's really intended. */
touchpad &= TOUCHPAD_SENS_NORMAL;
}
/* Simply include all lines in checks since "touchpad" has been
* masked to desired sensitivity already - allows any mask to be
* used without changing this code. */
if (touchpad & ((1 << 2) | (1 << 1) | (1 << 0)))
btn |= BUTTON_UP;
if (touchpad & ((1 << 12) | (1 << 11) | (1 << 10)))
btn |= BUTTON_RIGHT;
if (touchpad & ((1 << 6) | (1 << 5) | (1 << 4)))
btn |= BUTTON_DOWN;
if (touchpad & ((1 << 9) | (1 << 8) | (1 << 7)))
btn |= BUTTON_LEFT;
buttonlight_on();
}
return btn;
}
void touchpad_set_sensitivity(int level)
{
static const int masks[] =
{
TOUCHPAD_SENS_NORMAL,
TOUCHPAD_SENS_HIGH
};
if ((unsigned)level >= ARRAYLEN(masks))
level = 0;
touchpad_mask = masks[level];
}
bool headphones_inserted(void)
{
return headphones_detect;
}
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