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 | |