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rockbox/firmware/drivers/button.c

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Daniel Stenberg
*
* 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.
*
****************************************************************************/
/*
* Rockbox button functions
*/
#include <stdlib.h>
#include "config.h"
#include "system.h"
#include "button.h"
#include "kernel.h"
#include "thread.h"
#include "backlight.h"
#include "serial.h"
#include "power.h"
#include "powermgmt.h"
#include "button-target.h"
#ifdef HAVE_REMOTE_LCD
#include "lcd-remote.h"
#endif
#ifndef SIMULATOR
#if 0
/* Older than MAX_EVENT_AGE button events are going to be ignored.
* Used to prevent for example volume going up uncontrollable when events
* are getting queued and UI is lagging too much.
*/
#define MAX_EVENT_AGE HZ
#endif
struct event_queue button_queue;
static long lastbtn; /* Last valid button status */
static long last_read; /* Last button status, for debouncing/filtering */
static intptr_t button_data; /* data value from last message dequeued */
#ifdef HAVE_LCD_BITMAP
static bool flipped; /* buttons can be flipped to match the LCD flip */
#endif
#ifdef HAVE_BACKLIGHT
static bool filter_first_keypress;
#ifdef HAVE_REMOTE_LCD
static bool remote_filter_first_keypress;
#endif
#endif /* HAVE_BACKLIGHT */
#ifdef HAVE_HEADPHONE_DETECTION
static bool phones_present = false;
#endif
/* how long until repeat kicks in, in ticks */
#define REPEAT_START 30
/* the speed repeat starts at, in ticks */
#define REPEAT_INTERVAL_START 16
/* speed repeat finishes at, in ticks */
#define REPEAT_INTERVAL_FINISH 5
#ifdef HAVE_BUTTON_DATA
static int button_read(int *data);
#else
static int button_read(void);
#endif
#if defined(HAVE_HEADPHONE_DETECTION)
static struct timeout hp_detect_timeout; /* Debouncer for headphone plug/unplug */
/* This callback can be used for many different functions if needed -
just check to which object tmo points */
static bool btn_detect_callback(struct timeout *tmo)
{
/* Try to post only transistions */
const long id = tmo->data ? SYS_PHONE_PLUGGED : SYS_PHONE_UNPLUGGED;
queue_remove_from_head(&button_queue, id);
queue_post(&button_queue, id, 0);
return false;
}
#endif
static void button_tick(void)
{
static int count = 0;
static int repeat_speed = REPEAT_INTERVAL_START;
static int repeat_count = 0;
static bool repeat = false;
static bool post = false;
#ifdef HAVE_BACKLIGHT
static bool skip_release = false;
#ifdef HAVE_REMOTE_LCD
static bool skip_remote_release = false;
#endif
#endif
int diff;
int btn;
#ifdef HAVE_BUTTON_DATA
int data = 0;
#else
const int data = 0;
#endif
#ifdef HAS_SERIAL_REMOTE
/* Post events for the remote control */
btn = remote_control_rx();
if(btn)
{
queue_post(&button_queue, btn, 0);
}
#endif
#ifdef HAVE_BUTTON_DATA
btn = button_read(&data);
#else
btn = button_read();
#endif
#if defined(HAVE_HEADPHONE_DETECTION)
if (headphones_inserted() != phones_present)
{
/* Use the autoresetting oneshot to debounce the detection signal */
phones_present = !phones_present;
timeout_register(&hp_detect_timeout, btn_detect_callback,
HZ, phones_present);
}
#endif
/* Find out if a key has been released */
diff = btn ^ lastbtn;
if(diff && (btn & diff) == 0)
{
#ifdef HAVE_BACKLIGHT
#ifdef HAVE_REMOTE_LCD
if(diff & BUTTON_REMOTE)
if(!skip_remote_release)
queue_post(&button_queue, BUTTON_REL | diff, data);
else
skip_remote_release = false;
else
#endif
if(!skip_release)
queue_post(&button_queue, BUTTON_REL | diff, data);
else
skip_release = false;
#else
queue_post(&button_queue, BUTTON_REL | diff, data);
#endif
}
else
{
if ( btn )
{
/* normal keypress */
if ( btn != lastbtn )
{
post = true;
repeat = false;
repeat_speed = REPEAT_INTERVAL_START;
}
else /* repeat? */
{
if ( repeat )
{
if (!post)
count--;
if (count == 0) {
post = true;
/* yes we have repeat */
if (repeat_speed > REPEAT_INTERVAL_FINISH)
repeat_speed--;
count = repeat_speed;
repeat_count++;
/* Send a SYS_POWEROFF event if we have a device
which doesn't shut down easily with the OFF
key */
#ifdef HAVE_SW_POWEROFF
if ((btn == POWEROFF_BUTTON
#ifdef RC_POWEROFF_BUTTON
|| btn == RC_POWEROFF_BUTTON
#endif
) &&
#if CONFIG_CHARGING && !defined(HAVE_POWEROFF_WHILE_CHARGING)
!charger_inserted() &&
#endif
repeat_count > POWEROFF_COUNT)
{
/* Tell the main thread that it's time to
power off */
sys_poweroff();
/* Safety net for players without hardware
poweroff */
if(repeat_count > POWEROFF_COUNT * 10)
power_off();
}
#endif
}
}
else
{
if (count++ > REPEAT_START)
{
post = true;
repeat = true;
repeat_count = 0;
/* initial repeat */
count = REPEAT_INTERVAL_START;
}
}
}
if ( post )
{
if (repeat)
{
/* Only post repeat events if the queue is empty,
* to avoid afterscroll effects. */
if (queue_empty(&button_queue))
{
queue_post(&button_queue, BUTTON_REPEAT | btn, data);
#ifdef HAVE_BACKLIGHT
#ifdef HAVE_REMOTE_LCD
skip_remote_release = false;
#endif
skip_release = false;
#endif
post = false;
}
}
else
{
#ifdef HAVE_BACKLIGHT
#ifdef HAVE_REMOTE_LCD
if (btn & BUTTON_REMOTE) {
if (!remote_filter_first_keypress || is_remote_backlight_on()
#if defined(IRIVER_H100_SERIES) || defined(IRIVER_H300_SERIES)
|| (remote_type()==REMOTETYPE_H300_NONLCD)
#endif
)
queue_post(&button_queue, btn, data);
else
skip_remote_release = true;
}
else
#endif
if (!filter_first_keypress || is_backlight_on()
#if BUTTON_REMOTE
|| (btn&BUTTON_REMOTE)
#endif
)
queue_post(&button_queue, btn, data);
else
skip_release = true;
#else /* no backlight, nothing to skip */
queue_post(&button_queue, btn, data);
#endif
post = false;
}
#ifdef HAVE_REMOTE_LCD
if(btn & BUTTON_REMOTE)
remote_backlight_on();
else
#endif
{
backlight_on();
#ifdef HAVE_BUTTON_LIGHT
buttonlight_on();
#endif
}
reset_poweroff_timer();
}
}
else
{
repeat = false;
count = 0;
}
}
lastbtn = btn & ~(BUTTON_REL | BUTTON_REPEAT);
}
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
static void button_boost(bool state)
{
static bool boosted = false;
if (state && !boosted)
{
cpu_boost(true);
boosted = true;
}
else if (!state && boosted)
{
cpu_boost(false);
boosted = false;
}
}
#endif /* HAVE_ADJUSTABLE_CPU_FREQ */
int button_queue_count( void )
{
return queue_count(&button_queue);
}
long button_get(bool block)
{
struct queue_event ev;
int pending_count = queue_count(&button_queue);
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
/* Control the CPU boost trying to keep queue empty. */
if (pending_count == 0)
button_boost(false);
else if (pending_count > 2)
button_boost(true);
#endif
if ( block || pending_count )
{
queue_wait(&button_queue, &ev);
#if 0
/* Ignore if the event was too old and for simplicity, just
* wait for a new button_get() request. */
if (current_tick - ev.tick > MAX_EVENT_AGE)
return BUTTON_NONE;
#endif
button_data = ev.data;
return ev.id;
}
return BUTTON_NONE;
}
long button_get_w_tmo(int ticks)
{
struct queue_event ev;
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
/* Be sure to keep boosted state. */
if (!queue_empty(&button_queue))
return button_get(true);
button_boost(false);
#endif
queue_wait_w_tmo(&button_queue, &ev, ticks);
if (ev.id == SYS_TIMEOUT)
ev.id = BUTTON_NONE;
else
button_data = ev.data;
return ev.id;
}
intptr_t button_get_data(void)
{
return button_data;
}
void button_init(void)
{
/* Init used objects first */
queue_init(&button_queue, true);
#ifdef HAVE_BUTTON_DATA
int temp;
#endif
/* hardware inits */
button_init_device();
#ifdef HAVE_BUTTON_DATA
button_read(&temp);
lastbtn = button_read(&temp);
#else
button_read();
lastbtn = button_read();
#endif
reset_poweroff_timer();
#ifdef HAVE_LCD_BITMAP
flipped = false;
#endif
#ifdef HAVE_BACKLIGHT
filter_first_keypress = false;
#ifdef HAVE_REMOTE_LCD
remote_filter_first_keypress = false;
#endif
#endif
/* Start polling last */
tick_add_task(button_tick);
}
#ifdef HAVE_LCD_BITMAP /* only bitmap displays can be flipped */
/*
* helper function to swap LEFT/RIGHT, UP/DOWN (if present), and F1/F3 (Recorder)
*/
static int button_flip(int button)
{
int newbutton;
newbutton = button &
~(BUTTON_LEFT | BUTTON_RIGHT
#if defined(BUTTON_UP) && defined(BUTTON_DOWN)
| BUTTON_UP | BUTTON_DOWN
#endif
#if defined(BUTTON_SCROLL_BACK) && defined(BUTTON_SCROLL_FWD)
| BUTTON_SCROLL_BACK | BUTTON_SCROLL_FWD
#endif
#if CONFIG_KEYPAD == RECORDER_PAD
| BUTTON_F1 | BUTTON_F3
#endif
);
if (button & BUTTON_LEFT)
newbutton |= BUTTON_RIGHT;
if (button & BUTTON_RIGHT)
newbutton |= BUTTON_LEFT;
#if defined(BUTTON_UP) && defined(BUTTON_DOWN)
if (button & BUTTON_UP)
newbutton |= BUTTON_DOWN;
if (button & BUTTON_DOWN)
newbutton |= BUTTON_UP;
#endif
#if defined(BUTTON_SCROLL_BACK) && defined(BUTTON_SCROLL_FWD)
if (button & BUTTON_SCROLL_BACK)
newbutton |= BUTTON_SCROLL_FWD;
if (button & BUTTON_SCROLL_FWD)
newbutton |= BUTTON_SCROLL_BACK;
#endif
#if CONFIG_KEYPAD == RECORDER_PAD
if (button & BUTTON_F1)
newbutton |= BUTTON_F3;
if (button & BUTTON_F3)
newbutton |= BUTTON_F1;
#endif
return newbutton;
}
/*
* set the flip attribute
* better only call this when the queue is empty
*/
void button_set_flip(bool flip)
{
if (flip != flipped) /* not the current setting */
{
/* avoid race condition with the button_tick() */
int oldlevel = set_irq_level(HIGHEST_IRQ_LEVEL);
lastbtn = button_flip(lastbtn);
flipped = flip;
set_irq_level(oldlevel);
}
}
#endif /* HAVE_LCD_BITMAP */
#ifdef HAVE_BACKLIGHT
void set_backlight_filter_keypress(bool value)
{
filter_first_keypress = value;
}
#ifdef HAVE_REMOTE_LCD
void set_remote_backlight_filter_keypress(bool value)
{
remote_filter_first_keypress = value;
}
#endif
#endif
/*
* Get button pressed from hardware
*/
#ifdef HAVE_BUTTON_DATA
static int button_read(int *data)
{
int btn = button_read_device(data);
#else
static int button_read(void)
{
int btn = button_read_device();
#endif
int retval;
#ifdef HAVE_LCD_BITMAP
if (btn && flipped)
btn = button_flip(btn); /* swap upside down */
#endif
/* Filter the button status. It is only accepted if we get the same
status twice in a row. */
#ifndef HAVE_TOUCHPAD
if (btn != last_read)
retval = lastbtn;
else
#endif
retval = btn;
last_read = btn;
return retval;
}
int button_status(void)
{
return lastbtn;
}
void button_clear_queue(void)
{
queue_clear(&button_queue);
}
#endif /* SIMULATOR */
#ifdef HAVE_SCROLLWHEEL
/* WHEEL_ACCEL_FACTOR = 2^16 / WHEEL_ACCEL_START */
#define WHEEL_ACCEL_FACTOR (1<<16)/WHEEL_ACCEL_START
/**
* data:
* [31] Use acceleration
* [30:24] Message post count (skipped + 1) (1-127)
* [23:0] Velocity - degree/sec
*
* WHEEL_ACCEL_FACTOR:
* Value in degree/sec -- configurable via settings -- above which
* the accelerated scrolling starts. Factor is internally scaled by
* 1<<16 in respect to the following 32bit integer operations.
*/
int button_apply_acceleration(const unsigned int data)
{
int delta = (data >> 24) & 0x7f;
if ((data & (1 << 31)) != 0)
{
/* read driver's velocity from data */
unsigned int v = data & 0xffffff;
/* v = 28.4 fixed point */
v = (WHEEL_ACCEL_FACTOR * v)>>(16-4);
/* Calculate real numbers item to scroll based upon acceleration
* setting, use correct roundoff */
#if (WHEEL_ACCELERATION == 1)
v = (v*v + (1<< 7))>> 8;
#elif (WHEEL_ACCELERATION == 2)
v = (v*v*v + (1<<11))>>12;
#elif (WHEEL_ACCELERATION == 3)
v = (v*v*v*v + (1<<15))>>16;
#endif
if (v > 1)
delta *= v;
}
return delta;
}
#endif /* HAVE_SCROLLWHEEL */
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