8255.h revision 0a85b6f0ab0d2edb0d41b32697111ce0e4f43496 
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, struct comedi_subdevice *s,
32		     int (*cb) (int, int, int, unsigned long),
33		     unsigned long arg);
34int subdev_8255_init_irq(struct comedi_device *dev, struct comedi_subdevice *s,
35			 int (*cb) (int, int, int, unsigned long),
36			 unsigned long arg);
37void subdev_8255_cleanup(struct comedi_device *dev, struct comedi_subdevice *s);
38void subdev_8255_interrupt(struct comedi_device *dev,
39			   struct comedi_subdevice *s);
40
41#else
42
43static inline int subdev_8255_init(struct comedi_device *dev,
44				   struct comedi_subdevice *s, void *x,
45				   unsigned long y)
46{
47	printk("8255 support not configured -- disabling subdevice\n");
48
49	s->type = COMEDI_SUBD_UNUSED;
50
51	return 0;
52}
53
54static inline void subdev_8255_cleanup(struct comedi_device *dev,
55				       struct comedi_subdevice *s)
56{
57}
58
59#endif
60
61#endif
62