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/*
* $Id: serio.c,v 1.5 2000/06/04 17:44:59 vojtech 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>");
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 = NULL;
static struct serio_dev *serio_dev = NULL;
static int serio_number = 0;
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;
}
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