8255.h revision 6ca2733471190dd93b627a58148c1aeab5e0d797
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(comedi_device * dev, comedi_subdevice * s, 32 int (*cb) (int, int, int, unsigned long), unsigned long arg); 33int subdev_8255_init_irq(comedi_device * dev, comedi_subdevice * s, 34 int (*cb) (int, int, int, unsigned long), unsigned long arg); 35void subdev_8255_cleanup(comedi_device * dev, comedi_subdevice * s); 36void subdev_8255_interrupt(comedi_device * dev, comedi_subdevice * s); 37 38#else 39 40static inline int subdev_8255_init(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(comedi_device * dev, 51 comedi_subdevice * s) 52{ 53} 54 55#endif 56 57#endif 58