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rockbox/firmware/drivers/button.c
Thomas Martitz b2872c616c Enlarge the button post interval against audio drop outs, Too many lcd updates 
per seconds apparently don't very well.
Not sure if it's the hardware or our threading that doesn't play well enough
here (UI isn't less response despite of the audio drop outs).

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28144 a1c6a512-1295-4272-9138-f99709370657
2010-09-22 23:28:26 +00:00

672 lines
17 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Daniel Stenberg
*
* 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.
*
****************************************************************************/
/*
* 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"
#ifdef HAVE_SDL
#include "button-sdl.h"
#else
#include "button-target.h"
#endif
#ifdef HAVE_REMOTE_LCD
#include "lcd-remote.h"
#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 centiseconds */
#define REPEAT_START (30*HZ/100)
#ifndef HAVE_TOUCHSCREEN
/* the next two make repeat "accelerate", which is nice for lists
* which begin to scroll a bit faster when holding until the
* real list accerelation kicks in (this smoothes acceleration)
*/
/* the speed repeat starts at, in centiseconds */
#define REPEAT_INTERVAL_START (16*HZ/100)
/* speed repeat finishes at, in centiseconds */
#define REPEAT_INTERVAL_FINISH (5*HZ/100)
#else
/*
* on touchscreen it's different, scrolling is done by swiping over the
* screen (potentially very quickly) and is completely different from button
* targets
* So, on touchscreen we don't want to artifically slow down early repeats,
* it'd have the contrary effect of making rockbox appear lagging
*/
#define REPEAT_INTERVAL_START (5*HZ/100)
#define REPEAT_INTERVAL_FINISH (5*HZ/100)
#endif
#ifdef HAVE_BUTTON_DATA
static int button_read(int *data);
#else
static int button_read(void);
#endif
#ifdef HAVE_TOUCHSCREEN
static int last_touchscreen_touch;
static int lastdata = 0;
#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 int 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 0;
}
#endif
static bool button_try_post(int button, int data)
{
#ifdef HAVE_TOUCHSCREEN
/* one can swipe over the scren very quickly,
* for this to work we want to forget about old presses and
* only respect the very latest ones */
const int force_post = true;
#else
/* Only post events if the queue is empty,
* to avoid afterscroll effects.
* i.e. don't post new buttons if previous ones haven't been
* processed yet */
const int force_post = false;
#endif
bool ret = queue_empty(&button_queue);
if (!ret && force_post)
{
queue_remove_from_head(&button_queue, button);
ret = true;
}
if (ret)
queue_post(&button_queue, button, data);
/* on touchscreen we posted unconditionally */
return ret;
}
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
#if defined(HAS_SERIAL_REMOTE) && !defined(SIMULATOR)
/* Post events for the remote control */
btn = remote_control_rx();
if(btn)
button_try_post(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)
button_try_post(BUTTON_REL | diff, data);
else
skip_remote_release = false;
else
#endif
if(!skip_release)
button_try_post(BUTTON_REL | diff, data);
else
skip_release = false;
#else
button_try_post(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 (CONFIG_PLATFORM & PLATFORM_NATIVE)
if(repeat_count > POWEROFF_COUNT * 10)
power_off();
#endif
}
#endif
}
}
else
{
if (count++ > REPEAT_START)
{
post = true;
repeat = true;
repeat_count = 0;
/* initial repeat */
count = REPEAT_INTERVAL_START;
}
#ifdef HAVE_TOUCHSCREEN
else if (lastdata != data && btn == lastbtn)
{ /* only coordinates changed, post anyway */
if (touchscreen_get_mode() == TOUCHSCREEN_POINT)
post = true;
}
#endif
}
}
if ( post )
{
if (repeat)
{
/* Only post repeat events if the queue is empty,
* to avoid afterscroll effects. */
if (button_try_post(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(false)
#if defined(IRIVER_H100_SERIES) || defined(IRIVER_H300_SERIES)
|| (remote_type()==REMOTETYPE_H300_NONLCD)
#endif
)
button_try_post(btn, data);
else
skip_remote_release = true;
}
else
#endif
if (!filter_first_keypress || is_backlight_on(false)
#if BUTTON_REMOTE
|| (btn & BUTTON_REMOTE)
#endif
)
button_try_post(btn, data);
else
skip_release = true;
#else /* no backlight, nothing to skip */
button_try_post(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_BUTTON_DATA
lastdata = data;
#endif
}
#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);
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
#ifdef HAVE_TOUCHSCREEN
last_touchscreen_touch = 0xffff;
#endif
/* Start polling last */
tick_add_task(button_tick);
}
#ifdef BUTTON_DRIVER_CLOSE
void button_close(void)
{
tick_remove_task(button_tick);
}
#endif /* BUTTON_DRIVER_CLOSE */
#ifdef HAVE_LCD_FLIP
/*
* helper function to swap LEFT/RIGHT, UP/DOWN (if present), and F1/F3 (Recorder)
*/
static int button_flip(int button)
{
int newbutton = button;
#if (CONFIG_PLATFORM & PLATFORM_NATIVE)
newbutton &=
~(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 CONFIG_KEYPAD == SANSA_C200_PAD
| BUTTON_VOL_UP | BUTTON_VOL_DOWN
#endif
#if CONFIG_KEYPAD == PHILIPS_SA9200_PAD
| BUTTON_VOL_UP | BUTTON_VOL_DOWN
| BUTTON_NEXT | BUTTON_PREV
#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
#if CONFIG_KEYPAD == SANSA_C200_PAD
if (button & BUTTON_VOL_UP)
newbutton |= BUTTON_VOL_DOWN;
if (button & BUTTON_VOL_DOWN)
newbutton |= BUTTON_VOL_UP;
#endif
#if CONFIG_KEYPAD == PHILIPS_SA9200_PAD
if (button & BUTTON_VOL_UP)
newbutton |= BUTTON_VOL_DOWN;
if (button & BUTTON_VOL_DOWN)
newbutton |= BUTTON_VOL_UP;
if (button & BUTTON_NEXT)
newbutton |= BUTTON_PREV;
if (button & BUTTON_PREV)
newbutton |= BUTTON_NEXT;
#endif
#endif /* !SIMULATOR */
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 = disable_irq_save();
lastbtn = button_flip(lastbtn);
flipped = flip;
restore_irq(oldlevel);
}
}
#endif /* HAVE_LCD_FLIP */
#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_FLIP
if (btn && flipped)
btn = button_flip(btn); /* swap upside down */
#endif /* HAVE_LCD_FLIP */
#ifdef HAVE_TOUCHSCREEN
if (btn & BUTTON_TOUCHSCREEN)
last_touchscreen_touch = current_tick;
#endif
/* Filter the button status. It is only accepted if we get the same
status twice in a row. */
#ifndef HAVE_TOUCHSCREEN
if (btn != last_read)
retval = lastbtn;
else
#endif
retval = btn;
last_read = btn;
return retval;
}
int button_status(void)
{
return lastbtn;
}
#ifdef HAVE_BUTTON_DATA
int button_status_wdata(int *pdata)
{
*pdata = lastdata;
return lastbtn;
}
#endif
void button_clear_queue(void)
{
queue_clear(&button_queue);
}
#ifdef HAVE_TOUCHSCREEN
int touchscreen_last_touch(void)
{
return last_touchscreen_touch;
}
#endif
#ifdef HAVE_WHEEL_ACCELERATION
/* 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_WHEEL_ACCELERATION */
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