/* ------------------------------------------------------------------------- */ /* i2c-algo-bit.h i2c driver algorithms for bit-shift adapters */ /* ------------------------------------------------------------------------- */ /* Copyright (C) 1995-99 Simon G. Vogl This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* ------------------------------------------------------------------------- */ /* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even Frodo Looijaard <frodol@dds.nl> */ #ifndef _LINUX_I2C_ALGO_BIT_H #define _LINUX_I2C_ALGO_BIT_H /* --- Defines for bit-adapters --------------------------------------- */ /* * This struct contains the hw-dependent functions of bit-style adapters to * manipulate the line states, and to init any hw-specific features. This is * only used if you have more than one hw-type of adapter running. */ struct i2c_algo_bit_data { void *data; /* private data for lowlevel routines */ void (*setsda) (void *data, int state); void (*setscl) (void *data, int state); int (*getsda) (void *data); int (*getscl) (void *data); int (*pre_xfer) (struct i2c_adapter *); void (*post_xfer) (struct i2c_adapter *); /* local settings */ int udelay; /* half clock cycle time in us, minimum 2 us for fast-mode I2C, minimum 5 us for standard-mode I2C and SMBus, maximum 50 us for SMBus */ int timeout; /* in jiffies */ }; int i2c_bit_add_bus(struct i2c_adapter *); int i2c_bit_add_numbered_bus(struct i2c_adapter *); #endif /* _LINUX_I2C_ALGO_BIT_H */