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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 | */ |
33 | struct 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 | int (*pre_xfer) (struct i2c_adapter *); |
40 | void (*post_xfer) (struct i2c_adapter *); |
41 | |
42 | /* local settings */ |
43 | int udelay; /* half clock cycle time in us, |
44 | minimum 2 us for fast-mode I2C, |
45 | minimum 5 us for standard-mode I2C and SMBus, |
46 | maximum 50 us for SMBus */ |
47 | int timeout; /* in jiffies */ |
48 | }; |
49 | |
50 | int i2c_bit_add_bus(struct i2c_adapter *); |
51 | int i2c_bit_add_numbered_bus(struct i2c_adapter *); |
52 | |
53 | #endif /* _LINUX_I2C_ALGO_BIT_H */ |
54 |
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