1/* -------------------------------------------------------------------- */
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
15    GNU General Public License for more details.
16
17    You should have received a copy of the GNU General Public License
18    along with this program; if not, write to the Free Software
19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.		*/
20/* --------------------------------------------------------------------	*/
21
22/* With some changes from Frodo Looijaard <frodol@dds.nl> */
23
24#ifndef I2C_PCF8584_H
25#define I2C_PCF8584_H 1
26
27/* ----- Control register bits ----------------------------------------	*/
28#define I2C_PCF_PIN	0x80
29#define I2C_PCF_ESO	0x40
30#define I2C_PCF_ES1	0x20
31#define I2C_PCF_ES2	0x10
32#define I2C_PCF_ENI	0x08
33#define I2C_PCF_STA	0x04
34#define I2C_PCF_STO	0x02
35#define I2C_PCF_ACK	0x01
36
37#define I2C_PCF_START    (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
38#define I2C_PCF_STOP     (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STO | I2C_PCF_ACK)
39#define I2C_PCF_REPSTART (              I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
40#define I2C_PCF_IDLE     (I2C_PCF_PIN | I2C_PCF_ESO               | I2C_PCF_ACK)
41
42/* ----- Status register bits -----------------------------------------	*/
43/*#define I2C_PCF_PIN  0x80    as above*/
44
45#define I2C_PCF_INI 0x40   /* 1 if not initialized */
46#define I2C_PCF_STS 0x20
47#define I2C_PCF_BER 0x10
48#define I2C_PCF_AD0 0x08
49#define I2C_PCF_LRB 0x08
50#define I2C_PCF_AAS 0x04
51#define I2C_PCF_LAB 0x02
52#define I2C_PCF_BB  0x01
53
54/* ----- Chip clock frequencies ---------------------------------------	*/
55#define I2C_PCF_CLK3	0x00
56#define I2C_PCF_CLK443	0x10
57#define I2C_PCF_CLK6	0x14
58#define I2C_PCF_CLK	0x18
59#define I2C_PCF_CLK12	0x1c
60
61/* ----- transmission frequencies -------------------------------------	*/
62#define I2C_PCF_TRNS90 0x00	/*  90 kHz */
63#define I2C_PCF_TRNS45 0x01	/*  45 kHz */
64#define I2C_PCF_TRNS11 0x02	/*  11 kHz */
65#define I2C_PCF_TRNS15 0x03	/* 1.5 kHz */
66
67
68/* ----- Access to internal registers according to ES1,ES2 ------------	*/
69/* they are mapped to the data port ( a0 = 0 ) 				*/
70/* available when ESO == 0 :						*/
71
72#define I2C_PCF_OWNADR	0
73#define I2C_PCF_INTREG	I2C_PCF_ES2
74#define I2C_PCF_CLKREG	I2C_PCF_ES1
75
76#endif /* I2C_PCF8584_H */
77