8255.h revision 71b5f4f11971dea972832ad63a994c7e5b45db6b 
1/*
2    module/8255.h
3    Header file for 8255
4
5    COMEDI - Linux Control and Measurement Device Interface
6    Copyright (C) 1998 David A. Schleef <ds@schleef.org>
7
8    This program is free software; you can redistribute it and/or modify
9    it under the terms of the GNU General Public License as published by
10    the Free Software Foundation; either version 2 of the License, or
11    (at your option) any later version.
12
13    This program is distributed in the hope that it will be useful,
14    but WITHOUT ANY WARRANTY; without even the implied warranty of
15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16    GNU General Public License for more details.
17
18    You should have received a copy of the GNU General Public License
19    along with this program; if not, write to the Free Software
20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21
22*/
23
24#ifndef _8255_H
25#define _8255_H
26
27#include "../comedidev.h"
28
29#if defined(CONFIG_COMEDI_8255) || defined(CONFIG_COMEDI_8255_MODULE)
30
31int subdev_8255_init(struct comedi_device * dev, comedi_subdevice * s,
32	int (*cb) (int, int, int, unsigned long), unsigned long arg);
33int subdev_8255_init_irq(struct comedi_device * dev, comedi_subdevice * s,
34	int (*cb) (int, int, int, unsigned long), unsigned long arg);
35void subdev_8255_cleanup(struct comedi_device * dev, comedi_subdevice * s);
36void subdev_8255_interrupt(struct comedi_device * dev, comedi_subdevice * s);
37
38#else
39
40static inline int subdev_8255_init(struct comedi_device * dev, comedi_subdevice * s,
41	void *x, unsigned long y)
42{
43	printk("8255 support not configured -- disabling subdevice\n");
44
45	s->type = COMEDI_SUBD_UNUSED;
46
47	return 0;
48}
49
50static inline void subdev_8255_cleanup(struct comedi_device * dev,
51	comedi_subdevice * s)
52{
53}
54
55#endif
56
57#endif
58