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19#ifndef _8255_H
20#define _8255_H
21
22#define I8255_SIZE 0x04
23
24#define I8255_DATA_A_REG 0x00
25#define I8255_DATA_B_REG 0x01
26#define I8255_DATA_C_REG 0x02
27#define I8255_CTRL_REG 0x03
28#define I8255_CTRL_C_LO_IO BIT(0)
29#define I8255_CTRL_B_IO BIT(1)
30#define I8255_CTRL_B_MODE BIT(2)
31#define I8255_CTRL_C_HI_IO BIT(3)
32#define I8255_CTRL_A_IO BIT(4)
33#define I8255_CTRL_A_MODE(x) ((x) << 5)
34#define I8255_CTRL_CW BIT(7)
35
36struct comedi_device;
37struct comedi_subdevice;
38
39int subdev_8255_init(struct comedi_device *dev, struct comedi_subdevice *s,
40 int (*io)(struct comedi_device *dev, int dir, int port,
41 int data, unsigned long regbase),
42 unsigned long regbase);
43
44int subdev_8255_mm_init(struct comedi_device *dev, struct comedi_subdevice *s,
45 int (*io)(struct comedi_device *dev, int dir, int port,
46 int data, unsigned long regbase),
47 unsigned long regbase);
48
49unsigned long subdev_8255_regbase(struct comedi_subdevice *s);
50
51#endif
52