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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 by Mark Arigo
*
* 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 "system.h"
#include "button.h"
#include "backlight.h"
#include "synaptics-mep.h"
/*#define LOGF_ENABLE*/
#include "logf.h"
static int int_btn = BUTTON_NONE;
#ifndef BOOTLOADER
static bool hold_button_old = false;
/* Capacitive buttons - lowest setting is still very sensitive */
static const signed char button_sensitivity = -8; /* -8 to 7 */
/* Strip - decent amount of contact needed */
static const signed char strip_sensitivity = 0; /* -8 to 7 */
static const unsigned char strip_pressure = 25; /* 0 to 255 */
void button_init_device(void)
{
/* The touchpad is powered on and initialized in power-sa9200.c
since it needs to be ready for both buttons and button lights. */
/* perform button-specific inits here */
/* Besides $00, only common parameters $20 and $21 are supported */
/* Report modes:
* [15:12] cap btn sens : xxxx,
* [11: 8] pos sen sens : xxxx,
* [ 7: 6] rate: 10 (40 rps),
* [ 5] no filter: 0,
* [ 4] reserved: 0,
* [ 3] en scr: 0,
* [ 2] en btns: 1,
* [ 1] en rel: 0,
* [ 0] en abs: 1 */
touchpad_set_parameter(0, 0x20,
((button_sensitivity & 0xf) << 12) |
((strip_sensitivity & 0xf) << 8) |
(0x2 << 6) |
(0x1 << 2) |
(0x1 << 0));
/* Enhanced operating configuration:
* [15: 9] reserved : 0000000
* [ 8] Min abs reporting : 0
* [ 7] reserved : 0
* [ 6] not all cap btns : 1
* [ 5] single cap btn : 0
* [ 4] en 50ms debounce : 1
* [ 3] motion reporting : 0
* [ 2] clip z if no finger : 0
* [ 1] disable decel : 0
* [ 0] enable dribble : 0 */
touchpad_set_parameter(0, 0x21,
(0x1 << 6) | (0x1 << 4));
}
/*
* Button interrupt handler
*/
void button_int(void)
{
unsigned char data[4];
int val;
int_btn = BUTTON_NONE;
val = touchpad_read_device(data, 4);
if (val == MEP_BUTTON_HEADER)
{
/* Buttons packet */
if (data[1] & 0x1) int_btn |= BUTTON_RIGHT;
if (data[1] & 0x2) int_btn |= BUTTON_NEXT;
if (data[1] & 0x4) int_btn |= BUTTON_PREV;
if (data[1] & 0x8) int_btn |= BUTTON_LEFT;
if (data[2] & 0x1) int_btn |= BUTTON_MENU;
}
else if (val == MEP_ABSOLUTE_HEADER && data[3] >= strip_pressure)
{
/* Absolute packet - the finger is on the vertical strip.
Position ranges from 1-4095, with 1 at the bottom. */
val = ((data[1] >> 4) << 8) | data[2]; /* position */
if ((val > 0) && (val <= 1365))
int_btn |= BUTTON_DOWN;
else if ((val > 1365) && (val <= 2730))
int_btn |= BUTTON_PLAY;
else if ((val > 2730) && (val <= 4095))
int_btn |= BUTTON_UP;
}
}
#else
void button_init_device(void)
{
}
void button_int(void)
{
}
#endif /* BOOTLOADER */
bool button_hold(void)
{
return !(GPIOL_INPUT_VAL & 0x40);
}
/*
* Get button pressed from hardware
*/
int button_read_device(void)
{
int btn = int_btn;
bool hold = !(GPIOL_INPUT_VAL & 0x40);
#ifndef BOOTLOADER
/* Backlight hold handling */
if (hold != hold_button_old)
{
hold_button_old = hold;
backlight_hold_changed(hold);
}
#endif
if (hold)
return BUTTON_NONE;
if (!(GPIOB_INPUT_VAL & 0x20)) btn |= BUTTON_POWER;
if (!(GPIOF_INPUT_VAL & 0x10)) btn |= BUTTON_VOL_UP;
if (!(GPIOF_INPUT_VAL & 0x04)) btn |= BUTTON_VOL_DOWN;
return btn;
}
bool headphones_inserted(void)
{
return (GPIOB_INPUT_VAL & 0x10) ? false : true;
}
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