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1/* ------------------------------------------------------------------------- */
2/* i2c-algo-bit.h i2c driver algorithms for bit-shift adapters */
3/* ------------------------------------------------------------------------- */
4/* Copyright (C) 1995-99 Simon G. Vogl
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
19/* ------------------------------------------------------------------------- */
20
21/* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even
22 Frodo Looijaard <frodol@dds.nl> */
23
24#ifndef _LINUX_I2C_ALGO_BIT_H
25#define _LINUX_I2C_ALGO_BIT_H
26
27/* --- Defines for bit-adapters --------------------------------------- */
28/*
29 * This struct contains the hw-dependent functions of bit-style adapters to
30 * manipulate the line states, and to init any hw-specific features. This is
31 * only used if you have more than one hw-type of adapter running.
32 */
33struct i2c_algo_bit_data {
34 void *data; /* private data for lowlevel routines */
35 void (*setsda) (void *data, int state);
36 void (*setscl) (void *data, int state);
37 int (*getsda) (void *data);
38 int (*getscl) (void *data);
39
40 /* local settings */
41 int udelay; /* half clock cycle time in us,
42 minimum 2 us for fast-mode I2C,
43 minimum 5 us for standard-mode I2C and SMBus,
44 maximum 50 us for SMBus */
45 int timeout; /* in jiffies */
46};
47
48int i2c_bit_add_bus(struct i2c_adapter *);
49int i2c_bit_add_numbered_bus(struct i2c_adapter *);
50
51#endif /* _LINUX_I2C_ALGO_BIT_H */