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/* $OpenBSD: i2c_bitbang.h,v 1.3 2006/01/13 23:56:46 grange Exp $ */
/* $NetBSD: i2c_bitbang.h,v 1.1 2003/09/30 00:35:31 thorpej Exp $ */
/*
* Copyright (c) 2003 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _DEV_I2C_I2C_BITBANG_H_
#define _DEV_I2C_I2C_BITBANG_H_
#define I2C_BIT_SDA 0 /* SDA signal */
#define I2C_BIT_SCL 1 /* SCL signal */
#define I2C_BIT_OUTPUT 2 /* controller: SDA is output */
#define I2C_BIT_INPUT 3 /* controller: SDA is input */
#define I2C_NBITS 4
struct i2c_bitbang_ops {
void (*ibo_set_bits)(void *, uint32_t);
void (*ibo_set_dir)(void *, uint32_t);
uint32_t (*ibo_read_bits)(void *);
uint32_t ibo_bits[I2C_NBITS];
};
typedef const struct i2c_bitbang_ops *i2c_bitbang_ops_t;
int i2c_bitbang_send_start(void *, int, i2c_bitbang_ops_t);
int i2c_bitbang_send_stop(void *, int, i2c_bitbang_ops_t);
int i2c_bitbang_initiate_xfer(void *, i2c_addr_t, int, i2c_bitbang_ops_t);
int i2c_bitbang_read_byte(void *, uint8_t *, int, i2c_bitbang_ops_t);
int i2c_bitbang_write_byte(void *, uint8_t, int, i2c_bitbang_ops_t);
#endif /* _DEV_I2C_I2C_BITBANG_H_ */
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