Linux-2.6.12-rc2
[linux-2.6/kvm.git] / include / linux / i2c-algo-bit.h
blob1109044812383870f9565aeec428bfaf2294ba6b
1 /* ------------------------------------------------------------------------- */
2 /* i2c-algo-bit.h i2c driver algorithms for bit-shift adapters */
3 /* ------------------------------------------------------------------------- */
4 /* Copyright (C) 1995-99 Simon G. Vogl
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.
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.
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 /* ------------------------------------------------------------------------- */
21 /* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even
22 Frodo Looijaard <frodol@dds.nl> */
24 /* $Id: i2c-algo-bit.h,v 1.10 2003/01/21 08:08:16 kmalkki Exp $ */
26 #ifndef _LINUX_I2C_ALGO_BIT_H
27 #define _LINUX_I2C_ALGO_BIT_H
29 /* --- Defines for bit-adapters --------------------------------------- */
31 * This struct contains the hw-dependent functions of bit-style adapters to
32 * manipulate the line states, and to init any hw-specific features. This is
33 * only used if you have more than one hw-type of adapter running.
35 struct i2c_algo_bit_data {
36 void *data; /* private data for lowlevel routines */
37 void (*setsda) (void *data, int state);
38 void (*setscl) (void *data, int state);
39 int (*getsda) (void *data);
40 int (*getscl) (void *data);
42 /* local settings */
43 int udelay; /* half-clock-cycle time in microsecs */
44 /* i.e. clock is (500 / udelay) KHz */
45 int mdelay; /* in millisecs, unused */
46 int timeout; /* in jiffies */
49 #define I2C_BIT_ADAP_MAX 16
51 int i2c_bit_add_bus(struct i2c_adapter *);
52 int i2c_bit_del_bus(struct i2c_adapter *);
54 #endif /* _LINUX_I2C_ALGO_BIT_H */