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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2009 Bertrik Sikken
* Copyright (C) 2008 François Dinel
* Copyright © 2008-2009 Rafaël Carré
*
* 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 "system.h"
#include "kernel.h"
#include "button.h"
#include "as3525v2.h"
#ifndef BOOTLOADER
#include "backlight.h"
#endif
#if defined(SANSA_CLIP)
# define OUT_PIN GPIOC_PIN
# define OUT_DIR GPIOC_DIR
# define INITIAL 0
# define IN_PIN GPIOB_PIN
# define IN_DIR GPIOB_DIR
#elif defined(SANSA_CLIPV2)
# define OUT_PIN GPIOD_PIN
# define OUT_DIR GPIOD_DIR
# define INITIAL 1
# define IN_PIN GPIOD_PIN
# define IN_DIR GPIOD_DIR
#endif
static const int rows[3] = {
#if defined(SANSA_CLIP)
4, 5, 6
#elif defined(SANSA_CLIPV2)
3, 4, 5
#endif
};
void button_init_device(void)
{
GPIOA_DIR &= ~((1<<7) | (1<<3));
CCU_IO &= ~(3<<2);
IN_DIR &= ~((1<<2) | (1<<1) | (1<<0));
for (int i = 0; i < 3; i++) {
OUT_PIN(rows[i]) = INITIAL << rows[i];
OUT_DIR |= 1 << rows[i];
}
/* get initial readings */
button_read_device();
button_read_device();
button_read_device();
}
int button_read_device(void)
{
static int row, buttons;
static unsigned power_counter;
if(button_hold())
{
power_counter = HZ;
return 0;
}
/* direct GPIO connections */
/* read power, but not if hold button was just released, since
* you basically always hit power due to the slider mechanism after
* releasing hold (wait 1 sec) */
if (power_counter)
power_counter--;
if (GPIOA_PIN(7) && !power_counter)
buttons |= BUTTON_POWER;
else
buttons &= ~BUTTON_POWER;
static const int matrix [3][3] = {
{ 0 /*unused*/, BUTTON_VOL_UP, BUTTON_UP },
{ BUTTON_LEFT, BUTTON_SELECT, BUTTON_RIGHT },
{ BUTTON_DOWN, BUTTON_VOL_DOWN, BUTTON_HOME },
};
for (int i = 0; i<3; i++)
if (IN_PIN(i) ^ (INITIAL << i))
buttons |= matrix[row][i];
else
buttons &= ~matrix[row][i];
/* prepare next row */
OUT_PIN(rows[row]) = INITIAL << rows[row];
row++;
row %= 3;
OUT_PIN(rows[row]) = (!INITIAL) << rows[row];
return buttons;
}
bool button_hold(void)
{
#ifdef SANSA_CLIPV2
GPIOA_DIR |= 1<<7;
GPIOA_PIN(7) = 1<<7;
udelay(2);
#endif
bool hold_button = (GPIOA_PIN(3) != 0);
#ifdef SANSA_CLIPV2
GPIOA_PIN(7) = 0;
GPIOA_DIR &= ~(1<<7);
udelay(4);
#endif
#ifndef BOOTLOADER
static bool hold_button_old = false;
/* light handling */
if (hold_button != hold_button_old)
{
hold_button_old = hold_button;
backlight_hold_changed(hold_button);
}
#endif /* BOOTLOADER */
return hold_button;
}
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