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i2c-algo-pcf.h

/* -------------------------------------------------------------------- */
/* i2c-pcf8584.h: PCF 8584 global defines                   */
/* -------------------------------------------------------------------- */
/*   Copyright (C) 1996 Simon G. Vogl
                   1999 Hans Berglund

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.           */
/* -------------------------------------------------------------------- */

/* With some changes from Frodo Looijaard <frodol@dds.nl> */

#ifndef I2C_PCF8584_H
#define I2C_PCF8584_H 1

/* ----- Control register bits ---------------------------------------- */
#define I2C_PCF_PIN     0x80
#define I2C_PCF_ESO     0x40
#define I2C_PCF_ES1     0x20
#define I2C_PCF_ES2     0x10
#define I2C_PCF_ENI     0x08
#define I2C_PCF_STA     0x04
#define I2C_PCF_STO     0x02
#define I2C_PCF_ACK     0x01

#define I2C_PCF_START    (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
#define I2C_PCF_STOP     (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STO | I2C_PCF_ACK)
#define I2C_PCF_REPSTART (              I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
#define I2C_PCF_IDLE     (I2C_PCF_PIN | I2C_PCF_ESO               | I2C_PCF_ACK)

/* ----- Status register bits ----------------------------------------- */
/*#define I2C_PCF_PIN  0x80    as above*/

#define I2C_PCF_INI 0x40   /* 1 if not initialized */
#define I2C_PCF_STS 0x20
#define I2C_PCF_BER 0x10
#define I2C_PCF_AD0 0x08
#define I2C_PCF_LRB 0x08
#define I2C_PCF_AAS 0x04
#define I2C_PCF_LAB 0x02
#define I2C_PCF_BB  0x01

/* ----- Chip clock frequencies --------------------------------------- */
#define I2C_PCF_CLK3    0x00
#define I2C_PCF_CLK443  0x10
#define I2C_PCF_CLK6    0x14
#define I2C_PCF_CLK     0x18
#define I2C_PCF_CLK12   0x1c

/* ----- transmission frequencies ------------------------------------- */
#define I2C_PCF_TRNS90 0x00   /*  90 kHz */
#define I2C_PCF_TRNS45 0x01   /*  45 kHz */
#define I2C_PCF_TRNS11 0x02   /*  11 kHz */
#define I2C_PCF_TRNS15 0x03   /* 1.5 kHz */


/* ----- Access to internal registers according to ES1,ES2 ------------ */
/* they are mapped to the data port ( a0 = 0 )                    */
/* available when ESO == 0 :                                */

#define I2C_PCF_OWNADR  0
#define I2C_PCF_INTREG  I2C_PCF_ES2
#define I2C_PCF_CLKREG  I2C_PCF_ES1

#endif /* I2C_PCF8584_H */

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