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- /* ------------------------------------------------------------------------- */
- /* 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., 51 Franklin Street, Fifth Floor, Boston,
- MA 02110-1301 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 *);
- extern const struct i2c_algorithm i2c_bit_algo;
- #endif /* _LINUX_I2C_ALGO_BIT_H */
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