1 /* ------------------------------------------------------------------------- */

     2 /* adap-pcf.h i2c driver algorithms for PCF8584 adapters                     */

     3 /* ------------------------------------------------------------------------- */

     4 /*   Copyright (C) 1995-97 Simon G. Vogl

     5                    1998-99 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 Kyösti Mälkki <kmalkki@cc.hut.fi> and even

    23    Frodo Looijaard <frodol@dds.nl> */

    24 

    25 #ifndef _LINUX_I2C_ALGO_PCF_H

    26 #define _LINUX_I2C_ALGO_PCF_H

    27 

    28 struct i2c_algo_pcf_data {

    29 	void *data;		/* private data for lolevel routines	*/

    30 	void (*setpcf) (void *data, int ctl, int val);

    31 	int  (*getpcf) (void *data, int ctl);

    32 	int  (*getown) (void *data);

    33 	int  (*getclock) (void *data);

    34 	void (*waitforpin) (void *data);

    35 

    36 	void (*xfer_begin) (void *data);

    37 	void (*xfer_end) (void *data);

    38 

    39 	/* Multi-master lost arbitration back-off delay (msecs)

    40 	 * This should be set by the bus adapter or knowledgable client

    41 	 * if bus is multi-mastered, else zero

    42 	 */

    43 	unsigned long lab_mdelay;

    44 };

    45 

    46 int i2c_pcf_add_bus(struct i2c_adapter *);

    47 

    48 #endif /* _LINUX_I2C_ALGO_PCF_H */