projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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 | |
| 5694f8a8 JD |
18 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
| 19 | MA 02110-1301 USA. */ | |
| 1da177e4 LT |
20 | /* ------------------------------------------------------------------------- */ |
| 21 | ||
| 121e70b6 | 22 | /* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even |
| 1da177e4 LT |
23 | Frodo Looijaard <frodol@dds.nl> */ |
| 24 | ||
| 1da177e4 LT |
25 | #ifndef _LINUX_I2C_ALGO_BIT_H |
| 26 | #define _LINUX_I2C_ALGO_BIT_H | |
| 2292822e WS |
27 | |
| 28 | #include <linux/i2c.h> | |
| 1da177e4 LT |
29 | |
| 30 | /* --- Defines for bit-adapters --------------------------------------- */ | |
| 31 | /* | |
| 438d6c2c | 32 | * This struct contains the hw-dependent functions of bit-style adapters to |
| 1da177e4 | 33 | * manipulate the line states, and to init any hw-specific features. This is |
| 438d6c2c | 34 | * only used if you have more than one hw-type of adapter running. |
| 1da177e4 LT |
35 | */ |
| 36 | struct i2c_algo_bit_data { | |
| 37 | void *data; /* private data for lowlevel routines */ | |
| 38 | void (*setsda) (void *data, int state); | |
| 39 | void (*setscl) (void *data, int state); | |
| 40 | int (*getsda) (void *data); | |
| 41 | int (*getscl) (void *data); | |
| 0a9c1475 JD |
42 | int (*pre_xfer) (struct i2c_adapter *); |
| 43 | void (*post_xfer) (struct i2c_adapter *); | |
| 1da177e4 LT |
44 | |
| 45 | /* local settings */ | |
| 424ed67c JD |
46 | int udelay; /* half clock cycle time in us, |
| 47 | minimum 2 us for fast-mode I2C, | |
| 48 | minimum 5 us for standard-mode I2C and SMBus, | |
| 49 | maximum 50 us for SMBus */ | |
| 1da177e4 LT |
50 | int timeout; /* in jiffies */ |
| 51 | }; | |
| 52 | ||
| 1da177e4 | 53 | int i2c_bit_add_bus(struct i2c_adapter *); |
| 0f3b4838 | 54 | int i2c_bit_add_numbered_bus(struct i2c_adapter *); |
| b0209b39 | 55 | extern const struct i2c_algorithm i2c_bit_algo; |
| 1da177e4 LT |
56 | |
| 57 | #endif /* _LINUX_I2C_ALGO_BIT_H */ |