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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Barry Wardell
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
/* Taken from button-h10.c by Barry Wardell and reverse engineering by MrH. */
#include "system.h"
#include "button.h"
#include "backlight.h"
#define WHEEL_REPEAT_INTERVAL 30
#define WHEEL_FAST_ON_INTERVAL 2
#define WHEEL_FAST_OFF_INTERVAL 6
/* Clickwheel */
static unsigned int old_wheel_value = 0;
static unsigned int wheel_repeat = BUTTON_NONE;
static unsigned int wheel_click_count = 0;
static int wheel_fast_mode = 0;
static unsigned long last_wheel_tick = 0;
static unsigned long last_wheel_post = 0;
#ifndef BOOTLOADER
static unsigned long next_backlight_on = 0;
#endif
/* Buttons */
static bool hold_button = false;
#ifndef BOOTLOADER
static bool hold_button_old = false;
#endif
static int int_btn = BUTTON_NONE;
void button_init_device(void)
{
/* Enable all buttons */
GPIOF_OUTPUT_EN &= ~0xff;
GPIOF_ENABLE |= 0xff;
/* Scrollwheel light - enable control through GPIOG pin 7 and set timeout */
GPIOG_OUTPUT_EN |= 0x80;
GPIOG_ENABLE = 0x80;
GPIOH_ENABLE |= 0xc0;
GPIOH_OUTPUT_EN &= ~0xc0;
#if 0
CPU_INT_PRIORITY &= ~HI_MASK;
CPU_HI_INT_PRIORITY &= ~GPIO_MASK;
CPU_INT_CLR = HI_MASK;
CPU_HI_INT_CLR = GPIO_MASK;
#endif
GPIOF_INT_CLR = 0xff;
GPIOH_INT_CLR = 0xc0;
/* Read initial buttons */
old_wheel_value = GPIOF_INPUT_VAL & 0xff;
GPIOF_INT_LEV = (GPIOF_INT_LEV & ~0xff) | (old_wheel_value ^ 0xff);
hold_button = (GPIOF_INPUT_VAL & 0x80) != 0;
/* Read initial wheel value (bit 6-7 of GPIOH) */
old_wheel_value = GPIOH_INPUT_VAL & 0xc0;
GPIOH_INT_LEV = (GPIOH_INT_LEV & ~0xc0) | (old_wheel_value ^ 0xc0);
GPIOF_INT_EN = 0xff;
GPIOH_INT_EN = 0xc0;
#if 0
CPU_HI_INT_EN = GPIO_MASK;
CPU_INT_EN = HI_MASK;
#endif
last_wheel_tick = current_tick;
last_wheel_post = current_tick;
}
bool button_hold(void)
{
return hold_button;
}
void clickwheel_int(void)
{
/* Read wheel
* Bits 6 and 7 of GPIOH change as follows:
* Clockwise rotation 01 -> 00 -> 10 -> 11
* Counter-clockwise 11 -> 10 -> 00 -> 01
*
* This is equivalent to wheel_value of:
* Clockwise rotation 0x40 -> 0x00 -> 0x80 -> 0xc0
* Counter-clockwise 0xc0 -> 0x80 -> 0x00 -> 0x40
*/
static const unsigned char wheel_tbl[2][4] =
{
/* 0x00 0x40 0x80 0xc0 */ /* Wheel value */
{ 0x40, 0xc0, 0x00, 0x80 }, /* Clockwise rotation */
{ 0x80, 0x00, 0xc0, 0x40 }, /* Counter-clockwise */
};
unsigned int wheel_value;
GPIOH_INT_CLR = GPIOH_INT_STAT & 0xc0;
wheel_value = GPIOH_INPUT_VAL & 0xc0;
GPIOH_INT_LEV = (GPIOH_INT_LEV & ~0xc0) | (wheel_value ^ 0xc0);
if (!hold_button)
{
unsigned int btn = BUTTON_NONE;
if (old_wheel_value == wheel_tbl[0][wheel_value >> 6])
btn = BUTTON_SCROLL_DOWN;
else if (old_wheel_value == wheel_tbl[1][wheel_value >> 6])
btn = BUTTON_SCROLL_UP;
if (btn != BUTTON_NONE)
{
int repeat = 1;
if (btn != wheel_repeat)
{
wheel_repeat = btn;
repeat =
wheel_fast_mode =
wheel_click_count = 0;
}
if (wheel_fast_mode)
{
if (TIME_AFTER(current_tick,
last_wheel_tick + WHEEL_FAST_OFF_INTERVAL))
{
if (++wheel_click_count < 2)
btn = BUTTON_NONE;
wheel_fast_mode = 0;
}
}
else
{
if (repeat && TIME_BEFORE(current_tick,
last_wheel_tick + WHEEL_FAST_ON_INTERVAL))
wheel_fast_mode = 1;
else if (++wheel_click_count < 2)
btn = BUTTON_NONE;
}
#ifndef BOOTLOADER
if (TIME_AFTER(current_tick, next_backlight_on))
{
next_backlight_on = current_tick + HZ/4;
backlight_on();
button_backlight_on();
}
#endif
if (btn != BUTTON_NONE)
{
wheel_click_count = 0;
if (repeat && TIME_BEFORE(current_tick,
last_wheel_post + WHEEL_REPEAT_INTERVAL))
btn |= BUTTON_REPEAT;
last_wheel_post = current_tick;
if (queue_empty(&button_queue))
queue_post(&button_queue, btn, 0);
}
last_wheel_tick = current_tick;
}
}
old_wheel_value = wheel_value;
}
void button_int(void)
{
unsigned char state;
GPIOF_INT_CLR = GPIOF_INT_STAT;
state = GPIOF_INPUT_VAL & 0xff;
GPIOF_INT_LEV = (GPIOF_INT_LEV & ~0xff) | (state ^ 0xff);
int_btn = BUTTON_NONE;
hold_button = (state & 0x80) != 0;
/* device buttons */
if (!hold_button)
{
/* Read normal buttons */
if ((state & 0x01) == 0) int_btn |= BUTTON_REC;
if ((state & 0x02) == 0) int_btn |= BUTTON_DOWN;
if ((state & 0x04) == 0) int_btn |= BUTTON_RIGHT;
if ((state & 0x08) == 0) int_btn |= BUTTON_LEFT;
if ((state & 0x10) == 0) int_btn |= BUTTON_SELECT; /* The centre button */
if ((state & 0x20) == 0) int_btn |= BUTTON_UP; /* The "play" button */
if ((state & 0x40) != 0) int_btn |= BUTTON_POWER;
}
}
/*
* Get button pressed from hardware
*/
int button_read_device(void)
{
/* Hold */
#ifndef BOOTLOADER
/* light handling */
if (hold_button != hold_button_old)
{
hold_button_old = hold_button;
backlight_hold_changed(hold_button);
}
#endif
/* The int_btn variable is set in the button interrupt handler */
return int_btn;
}
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