LXR linux/drivers/staging/comedi/drivers/8255.h

   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