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/*
* module/8255.h
* Header file for 8255
*
* COMEDI - Linux Control and Measurement Device Interface
* Copyright (C) 1998 David A. Schleef <ds@schleef.org>
*
* 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.
*/
#ifndef _8255_H
#define _8255_H
#define I8255_SIZE 0x04
#define I8255_DATA_A_REG 0x00
#define I8255_DATA_B_REG 0x01
#define I8255_DATA_C_REG 0x02
#define I8255_CTRL_REG 0x03
#define I8255_CTRL_C_LO_IO BIT(0)
#define I8255_CTRL_B_IO BIT(1)
#define I8255_CTRL_B_MODE BIT(2)
#define I8255_CTRL_C_HI_IO BIT(3)
#define I8255_CTRL_A_IO BIT(4)
#define I8255_CTRL_A_MODE(x) ((x) << 5)
#define I8255_CTRL_CW BIT(7)
struct comedi_device;
struct comedi_subdevice;
int subdev_8255_init(struct comedi_device *dev, struct comedi_subdevice *s,
int (*io)(struct comedi_device *dev, int dir, int port,
int data, unsigned long regbase),
unsigned long regbase);
int subdev_8255_mm_init(struct comedi_device *dev, struct comedi_subdevice *s,
int (*io)(struct comedi_device *dev, int dir, int port,
int data, unsigned long regbase),
unsigned long regbase);
unsigned long subdev_8255_regbase(struct comedi_subdevice *s);
#endif
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