Contributors: 5
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| H Hartley Sweeten |
77 |
47.24% |
6 |
42.86% |
| David A. Schleef |
49 |
30.06% |
1 |
7.14% |
| Ian Abbott |
33 |
20.25% |
4 |
28.57% |
| Bill Pemberton |
3 |
1.84% |
2 |
14.29% |
| Stephen Davies |
1 |
0.61% |
1 |
7.14% |
| Total |
163 |
|
14 |
|
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* comedi_8255.h
* Generic 8255 digital I/O subdevice support
*
* COMEDI - Linux Control and Measurement Device Interface
* Copyright (C) 1998 David A. Schleef <ds@schleef.org>
*/
#ifndef _COMEDI_8255_H
#define _COMEDI_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