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i2c-algo-pcf.h
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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 <[email protected]> and even
24  Frodo Looijaard <[email protected]> */
25 
26 #ifndef _LINUX_I2C_ALGO_PCF_H
27 #define _LINUX_I2C_ALGO_PCF_H
28 
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 */