Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
John Anthony Kazos Jr | 121e70b | 2007-05-09 08:30:57 +0200 | [diff] [blame] | 21 | /* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | Frodo Looijaard <frodol@dds.nl> */ |
| 23 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #ifndef _LINUX_I2C_ALGO_BIT_H |
| 25 | #define _LINUX_I2C_ALGO_BIT_H |
| 26 | |
| 27 | /* --- Defines for bit-adapters --------------------------------------- */ |
| 28 | /* |
David Brownell | 438d6c2 | 2006-12-10 21:21:31 +0100 | [diff] [blame] | 29 | * This struct contains the hw-dependent functions of bit-style adapters to |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | * manipulate the line states, and to init any hw-specific features. This is |
David Brownell | 438d6c2 | 2006-12-10 21:21:31 +0100 | [diff] [blame] | 31 | * only used if you have more than one hw-type of adapter running. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Jean Delvare | 0a9c147 | 2010-03-13 20:56:56 +0100 | [diff] [blame] | 39 | int (*pre_xfer) (struct i2c_adapter *); |
| 40 | void (*post_xfer) (struct i2c_adapter *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
| 42 | /* local settings */ |
Jean Delvare | 424ed67 | 2007-05-01 23:26:33 +0200 | [diff] [blame] | 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 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | int timeout; /* in jiffies */ |
| 48 | }; |
| 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | int i2c_bit_add_bus(struct i2c_adapter *); |
Jean Delvare | 0f3b483 | 2007-05-01 23:26:31 +0200 | [diff] [blame] | 51 | int i2c_bit_add_numbered_bus(struct i2c_adapter *); |
Daniel Vetter | b0209b3 | 2012-02-28 00:39:39 +0100 | [diff] [blame] | 52 | extern const struct i2c_algorithm i2c_bit_algo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
| 54 | #endif /* _LINUX_I2C_ALGO_BIT_H */ |