784790dbec
Also introduce a new delay needed for frequency scaling. Change-Id: I575a503a8ca44358fcd5512fd951fe9c7bbde31c
143 lines
3.5 KiB
C
143 lines
3.5 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* 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;
|
|
}
|