| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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 */ |