63 lines
2.7 KiB
C
63 lines
2.7 KiB
C
/* $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_ */
|