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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* -------------------------------------------------------------------- */
2/* i2c-pcf8584.h: PCF 8584 global defines */
3/* -------------------------------------------------------------------- */
4/* Copyright (C) 1996 Simon G. Vogl
5 1999 Hans Berglund
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
Wolfram Sangca1f8da2014-11-04 23:46:27 +010015 GNU General Public License for more details. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070016/* -------------------------------------------------------------------- */
17
18/* With some changes from Frodo Looijaard <frodol@dds.nl> */
19
20#ifndef I2C_PCF8584_H
21#define I2C_PCF8584_H 1
22
23/* ----- Control register bits ---------------------------------------- */
24#define I2C_PCF_PIN 0x80
25#define I2C_PCF_ESO 0x40
26#define I2C_PCF_ES1 0x20
27#define I2C_PCF_ES2 0x10
28#define I2C_PCF_ENI 0x08
29#define I2C_PCF_STA 0x04
30#define I2C_PCF_STO 0x02
31#define I2C_PCF_ACK 0x01
32
33#define I2C_PCF_START (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
34#define I2C_PCF_STOP (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STO | I2C_PCF_ACK)
35#define I2C_PCF_REPSTART ( I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
36#define I2C_PCF_IDLE (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_ACK)
37
38/* ----- Status register bits ----------------------------------------- */
39/*#define I2C_PCF_PIN 0x80 as above*/
40
41#define I2C_PCF_INI 0x40 /* 1 if not initialized */
42#define I2C_PCF_STS 0x20
43#define I2C_PCF_BER 0x10
44#define I2C_PCF_AD0 0x08
45#define I2C_PCF_LRB 0x08
46#define I2C_PCF_AAS 0x04
47#define I2C_PCF_LAB 0x02
48#define I2C_PCF_BB 0x01
49
50/* ----- Chip clock frequencies --------------------------------------- */
51#define I2C_PCF_CLK3 0x00
52#define I2C_PCF_CLK443 0x10
53#define I2C_PCF_CLK6 0x14
54#define I2C_PCF_CLK 0x18
55#define I2C_PCF_CLK12 0x1c
56
57/* ----- transmission frequencies ------------------------------------- */
58#define I2C_PCF_TRNS90 0x00 /* 90 kHz */
59#define I2C_PCF_TRNS45 0x01 /* 45 kHz */
60#define I2C_PCF_TRNS11 0x02 /* 11 kHz */
61#define I2C_PCF_TRNS15 0x03 /* 1.5 kHz */
62
63
64/* ----- Access to internal registers according to ES1,ES2 ------------ */
65/* they are mapped to the data port ( a0 = 0 ) */
66/* available when ESO == 0 : */
67
68#define I2C_PCF_OWNADR 0
69#define I2C_PCF_INTREG I2C_PCF_ES2
70#define I2C_PCF_CLKREG I2C_PCF_ES1
71
72#endif /* I2C_PCF8584_H */