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., 51 Franklin Street, Fifth Floor, Boston,
20     MA 02110-1301 USA.							     */
21 /* ------------------------------------------------------------------------- */
22 
23 /* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even
24    Frodo Looijaard <frodol@dds.nl> */
25 
26 #ifndef _LINUX_I2C_ALGO_PCF_H
27 #define _LINUX_I2C_ALGO_PCF_H
28 
29 struct i2c_algo_pcf_data {
30 	void *data;		/* private data for lolevel routines	*/
31 	void (*setpcf) (void *data, int ctl, int val);
32 	int  (*getpcf) (void *data, int ctl);
33 	int  (*getown) (void *data);
34 	int  (*getclock) (void *data);
35 	void (*waitforpin) (void *data);
36 
37 	void (*xfer_begin) (void *data);
38 	void (*xfer_end) (void *data);
39 
40 	/* Multi-master lost arbitration back-off delay (msecs)
41 	 * This should be set by the bus adapter or knowledgable client
42 	 * if bus is multi-mastered, else zero
43 	 */
44 	unsigned long lab_mdelay;
45 };
46 
47 int i2c_pcf_add_bus(struct i2c_adapter *);
48 
49 #endif /* _LINUX_I2C_ALGO_PCF_H */
50