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