kbdrepeat.c

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/*
 * Copyright (c) 2011 Lubos Slovak
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <fibril_synch.h>
#include <io/keycode.h>
#include <io/console.h>
#include <errno.h>

#include <usb/debug.h>

#include "kbdrepeat.h"
#include "kbddev.h"


static unsigned int CHECK_DELAY = 10000;

/*----------------------------------------------------------------------------*/
static void usb_kbd_repeat_loop(usb_kbd_t *kbd)
{
        unsigned int delay = 0;
        
        usb_log_debug("Starting autorepeat loop.\n");

        while (true) {
                // check if the kbd structure is usable
                if (!usb_kbd_is_initialized(kbd)) {
                        if (usb_kbd_is_ready_to_destroy(kbd)) {
                                usb_kbd_free(&kbd);
                                assert(kbd == NULL);
                        }
                        return;
                }
                
                fibril_mutex_lock(kbd->repeat_mtx);

                if (kbd->repeat.key_new > 0) {
                        if (kbd->repeat.key_new == kbd->repeat.key_repeated) {
                                usb_log_debug2("Repeating key: %u.\n", 
                                    kbd->repeat.key_repeated);
                                // ugly hack with the NULL
                                usb_kbd_push_ev(NULL, kbd, KEY_PRESS, 
                                    kbd->repeat.key_repeated);
                                delay = kbd->repeat.delay_between;
                        } else {
                                usb_log_debug("New key to repeat: %u.\n", 
                                    kbd->repeat.key_new);
                                kbd->repeat.key_repeated = kbd->repeat.key_new;
                                delay = kbd->repeat.delay_before;
                        }
                } else {
                        if (kbd->repeat.key_repeated > 0) {
                                usb_log_debug("Stopping to repeat key: %u.\n", 
                                    kbd->repeat.key_repeated);
                                kbd->repeat.key_repeated = 0;
                        }
                        delay = CHECK_DELAY;
                }
                fibril_mutex_unlock(kbd->repeat_mtx);
                
                async_usleep(delay);
        }
}

/*----------------------------------------------------------------------------*/
int usb_kbd_repeat_fibril(void *arg)
{
        usb_log_debug("Autorepeat fibril spawned.\n");
        
        if (arg == NULL) {
                usb_log_error("No device!\n");
                return EINVAL;
        }
        
        usb_kbd_t *kbd = (usb_kbd_t *)arg;
        
        usb_kbd_repeat_loop(kbd);
        
        return EOK;
}

/*----------------------------------------------------------------------------*/
void usb_kbd_repeat_start(usb_kbd_t *kbd, unsigned int key)
{
        fibril_mutex_lock(kbd->repeat_mtx);
        kbd->repeat.key_new = key;
        fibril_mutex_unlock(kbd->repeat_mtx);
}

/*----------------------------------------------------------------------------*/
void usb_kbd_repeat_stop(usb_kbd_t *kbd, unsigned int key)
{
        fibril_mutex_lock(kbd->repeat_mtx);
        if (key == kbd->repeat.key_new) {
                kbd->repeat.key_new = 0;
        }
        fibril_mutex_unlock(kbd->repeat_mtx);
}

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