tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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., 51 Franklin Street, Fifth Floor, Boston,
20 MA 02110-1301 USA. */
21/* -------------------------------------------------------------------- */
22
23/* With some changes from Frodo Looijaard <frodol@dds.nl> */
24
25#ifndef I2C_PCF8584_H
26#define I2C_PCF8584_H 1
27
28/* ----- Control register bits ---------------------------------------- */
29#define I2C_PCF_PIN 0x80
30#define I2C_PCF_ESO 0x40
31#define I2C_PCF_ES1 0x20
32#define I2C_PCF_ES2 0x10
33#define I2C_PCF_ENI 0x08
34#define I2C_PCF_STA 0x04
35#define I2C_PCF_STO 0x02
36#define I2C_PCF_ACK 0x01
37
38#define I2C_PCF_START (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
39#define I2C_PCF_STOP (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STO | I2C_PCF_ACK)
40#define I2C_PCF_REPSTART ( I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
41#define I2C_PCF_IDLE (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_ACK)
42
43/* ----- Status register bits ----------------------------------------- */
44/*#define I2C_PCF_PIN 0x80 as above*/
45
46#define I2C_PCF_INI 0x40 /* 1 if not initialized */
47#define I2C_PCF_STS 0x20
48#define I2C_PCF_BER 0x10
49#define I2C_PCF_AD0 0x08
50#define I2C_PCF_LRB 0x08
51#define I2C_PCF_AAS 0x04
52#define I2C_PCF_LAB 0x02
53#define I2C_PCF_BB 0x01
54
55/* ----- Chip clock frequencies --------------------------------------- */
56#define I2C_PCF_CLK3 0x00
57#define I2C_PCF_CLK443 0x10
58#define I2C_PCF_CLK6 0x14
59#define I2C_PCF_CLK 0x18
60#define I2C_PCF_CLK12 0x1c
61
62/* ----- transmission frequencies ------------------------------------- */
63#define I2C_PCF_TRNS90 0x00 /* 90 kHz */
64#define I2C_PCF_TRNS45 0x01 /* 45 kHz */
65#define I2C_PCF_TRNS11 0x02 /* 11 kHz */
66#define I2C_PCF_TRNS15 0x03 /* 1.5 kHz */
67
68
69/* ----- Access to internal registers according to ES1,ES2 ------------ */
70/* they are mapped to the data port ( a0 = 0 ) */
71/* available when ESO == 0 : */
72
73#define I2C_PCF_OWNADR 0
74#define I2C_PCF_INTREG I2C_PCF_ES2
75#define I2C_PCF_CLKREG I2C_PCF_ES1
76
77#endif /* I2C_PCF8584_H */