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/*

 * $Id: serio.c,v 1.1.1.1 2004-04-15 02:03:25 phoenix Exp $

 *

 *  Copyright (c) 1999-2000 Vojtech Pavlik

 *

 *  Sponsored by SuSE

 */

/*

 *  The Serio abstraction module

 */

/*

 * 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 program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

 *

 * Should you need to contact me, the author, you can do so either by

 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:

 * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic

 */

#include <linux/stddef.h>

#include <linux/module.h>

#include <linux/serio.h>

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");

MODULE_LICENSE("GPL");

EXPORT_SYMBOL(serio_register_port);

EXPORT_SYMBOL(serio_unregister_port);

EXPORT_SYMBOL(serio_register_device);

EXPORT_SYMBOL(serio_unregister_device);

EXPORT_SYMBOL(serio_open);

EXPORT_SYMBOL(serio_close);

EXPORT_SYMBOL(serio_rescan);

static struct serio *serio_list;

static struct serio_dev *serio_dev;

static int serio_number;

static void serio_find_dev(struct serio *serio)

{

        struct serio_dev *dev = serio_dev;

        while (dev && !serio->dev) {

                if (dev->connect)

                        dev->connect(serio, dev);

                dev = dev->next;

        }

}

void serio_rescan(struct serio *serio)

{

        if (serio->dev && serio->dev->disconnect)

                serio->dev->disconnect(serio);

        serio_find_dev(serio);

}

void serio_register_port(struct serio *serio)

{

        serio->number = serio_number++;

        serio->next = serio_list;

        serio_list = serio;

        serio_find_dev(serio);

}

void serio_unregister_port(struct serio *serio)

{

        struct serio **serioptr = &serio_list;

        while (*serioptr && (*serioptr != serio)) serioptr = &((*serioptr)->next);

        *serioptr = (*serioptr)->next;

        if (serio->dev && serio->dev->disconnect)

                serio->dev->disconnect(serio);

        serio_number--;

}

void serio_register_device(struct serio_dev *dev)

{

        struct serio *serio = serio_list;

        dev->next = serio_dev;

        serio_dev = dev;

        while (serio) {

                if (!serio->dev && dev->connect)

                        dev->connect(serio, dev);

                serio = serio->next;

        }

}

void serio_unregister_device(struct serio_dev *dev)

{

        struct serio_dev **devptr = &serio_dev;

        struct serio *serio = serio_list;

        while (*devptr && (*devptr != dev)) devptr = &((*devptr)->next);

        *devptr = (*devptr)->next;

        while (serio) {

                if (serio->dev == dev && dev->disconnect)

                        dev->disconnect(serio);

                serio_find_dev(serio);

                serio = serio->next;

        }

}

int serio_open(struct serio *serio, struct serio_dev *dev)

{

        if (serio->open(serio))

                return -1;

        serio->dev = dev;

        return 0;

}

void serio_close(struct serio *serio)

{

        serio->close(serio);

        serio->dev = NULL;

}