1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/* -------------------------------------------------------------------- */
3/* i2c-pcf8584.h: PCF 8584 global defines				*/
4/* -------------------------------------------------------------------- */
5/*   Copyright (C) 1996 Simon G. Vogl
6                   1999 Hans Berglund
7
8 */
9/* --------------------------------------------------------------------	*/
10
11/* With some changes from Frodo Looijaard <frodol@dds.nl> */
12
13#ifndef I2C_PCF8584_H
14#define I2C_PCF8584_H 1
15
16/* ----- Control register bits ----------------------------------------	*/
17#define I2C_PCF_PIN	0x80
18#define I2C_PCF_ESO	0x40
19#define I2C_PCF_ES1	0x20
20#define I2C_PCF_ES2	0x10
21#define I2C_PCF_ENI	0x08
22#define I2C_PCF_STA	0x04
23#define I2C_PCF_STO	0x02
24#define I2C_PCF_ACK	0x01
25
26#define I2C_PCF_START    (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
27#define I2C_PCF_STOP     (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STO | I2C_PCF_ACK)
28#define I2C_PCF_REPSTART (              I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
29#define I2C_PCF_IDLE     (I2C_PCF_PIN | I2C_PCF_ESO               | I2C_PCF_ACK)
30
31/* ----- Status register bits -----------------------------------------	*/
32/*#define I2C_PCF_PIN  0x80    as above*/
33
34#define I2C_PCF_INI 0x40   /* 1 if not initialized */
35#define I2C_PCF_STS 0x20
36#define I2C_PCF_BER 0x10
37#define I2C_PCF_AD0 0x08
38#define I2C_PCF_LRB 0x08
39#define I2C_PCF_AAS 0x04
40#define I2C_PCF_LAB 0x02
41#define I2C_PCF_BB  0x01
42
43/* ----- Chip clock frequencies ---------------------------------------	*/
44#define I2C_PCF_CLK3	0x00
45#define I2C_PCF_CLK443	0x10
46#define I2C_PCF_CLK6	0x14
47#define I2C_PCF_CLK	0x18
48#define I2C_PCF_CLK12	0x1c
49
50/* ----- transmission frequencies -------------------------------------	*/
51#define I2C_PCF_TRNS90 0x00	/*  90 kHz */
52#define I2C_PCF_TRNS45 0x01	/*  45 kHz */
53#define I2C_PCF_TRNS11 0x02	/*  11 kHz */
54#define I2C_PCF_TRNS15 0x03	/* 1.5 kHz */
55
56
57/* ----- Access to internal registers according to ES1,ES2 ------------	*/
58/* they are mapped to the data port ( a0 = 0 ) 				*/
59/* available when ESO == 0 :						*/
60
61#define I2C_PCF_OWNADR	0
62#define I2C_PCF_INTREG	I2C_PCF_ES2
63#define I2C_PCF_CLKREG	I2C_PCF_ES1
64
65#endif /* I2C_PCF8584_H */
66