8255.h

rtlinux-3.2-pre3.tar.bz2 rtlinux3.2-pre3的源代码

/*
    module/8255.h
    Header file for 8255

    COMEDI - Linux Control and Measurement Device Interface
    Copyright (C) 1998 David A. Schleef <[e-mail]>

    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., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#ifndef _8255_H
#define _8255_H

#include <linux/comedidev.h>

#if defined(CONFIG_COMEDI_8255) || defined(CONFIG_COMEDI_8255_MODULE)

int subdev_8255_init(comedi_device *dev,comedi_subdevice *s,
		int (*cb)(int,int,int,unsigned long),unsigned long arg);
int subdev_8255_init_irq(comedi_device *dev,comedi_subdevice *s,
		int (*cb)(int,int,int,unsigned long),unsigned long arg);
void subdev_8255_cleanup(comedi_device *dev,comedi_subdevice *s);
void subdev_8255_interrupt(comedi_device *dev,comedi_subdevice *s);

#else

static inline int subdev_8255_init(comedi_device *dev,comedi_subdevice *s,void *x,unsigned long y)
{
	printk("8255 support not configured -- disabling subdevice\n");

	s->type=COMEDI_SUBD_UNUSED;

	return 0;
}

static inline void subdev_8255_cleanup(comedi_device *dev,comedi_subdevice *s){}

#endif

#endif