projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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 | |
| ca1f8da9 | 15 | GNU General Public License for more details. */ |
| 1da177e4 LT |
16 | /* -------------------------------------------------------------------- */ |
| 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 */ |