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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/drivers/i2c/algos/i2c-algo-pcf.h
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/* -------------------------------------------------------------------- */

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/* i2c-pcf8584.h: PCF 8584 global defines				*/

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/* -------------------------------------------------------------------- */

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/*   Copyright (C) 1996 Simon G. Vogl

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                   1999 Hans Berglund

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    This program is free software; you can redistribute it and/or modify

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    it under the terms of the GNU General Public License as published by

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    the Free Software Foundation; either version 2 of the License, or

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    (at your option) any later version.

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    This program is distributed in the hope that it will be useful,

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    but WITHOUT ANY WARRANTY; without even the implied warranty of

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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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    GNU General Public License for more details.

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    You should have received a copy of the GNU General Public License

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    along with this program; if not, write to the Free Software

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    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.		*/

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/* --------------------------------------------------------------------	*/

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/* With some changes from Frodo Looijaard <[email protected]> */

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#ifndef I2C_PCF8584_H

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#define I2C_PCF8584_H 1

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/* ----- Control register bits ----------------------------------------	*/

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#define I2C_PCF_PIN	0x80

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#define I2C_PCF_ESO	0x40

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#define I2C_PCF_ES1	0x20

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#define I2C_PCF_ES2	0x10

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#define I2C_PCF_ENI	0x08

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#define I2C_PCF_STA	0x04

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#define I2C_PCF_STO	0x02

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#define I2C_PCF_ACK	0x01

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#define I2C_PCF_START    (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)

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#define I2C_PCF_STOP     (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STO | I2C_PCF_ACK)

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#define I2C_PCF_REPSTART (              I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)

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#define I2C_PCF_IDLE     (I2C_PCF_PIN | I2C_PCF_ESO               | I2C_PCF_ACK)

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/* ----- Status register bits -----------------------------------------	*/

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/*#define I2C_PCF_PIN  0x80    as above*/

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#define I2C_PCF_INI 0x40   /* 1 if not initialized */

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#define I2C_PCF_STS 0x20

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#define I2C_PCF_BER 0x10

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#define I2C_PCF_AD0 0x08

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#define I2C_PCF_LRB 0x08

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#define I2C_PCF_AAS 0x04

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#define I2C_PCF_LAB 0x02

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#define I2C_PCF_BB  0x01

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/* ----- Chip clock frequencies ---------------------------------------	*/

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#define I2C_PCF_CLK3	0x00

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#define I2C_PCF_CLK443	0x10

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#define I2C_PCF_CLK6	0x14

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#define I2C_PCF_CLK	0x18

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#define I2C_PCF_CLK12	0x1c

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/* ----- transmission frequencies -------------------------------------	*/

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#define I2C_PCF_TRNS90 0x00	/*  90 kHz */

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#define I2C_PCF_TRNS45 0x01	/*  45 kHz */

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#define I2C_PCF_TRNS11 0x02	/*  11 kHz */

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#define I2C_PCF_TRNS15 0x03	/* 1.5 kHz */

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/* ----- Access to internal registers according to ES1,ES2 ------------	*/

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/* they are mapped to the data port ( a0 = 0 ) 				*/

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/* available when ESO == 0 :						*/

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#define I2C_PCF_OWNADR	0

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#define I2C_PCF_INTREG	I2C_PCF_ES2

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#define I2C_PCF_CLKREG	I2C_PCF_ES1

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#endif /* I2C_PCF8584_H */

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