2652188cc4
interface controllers (of varying intelligence levels). Contributed by Wasabi Systems, Inc. Primarily written by Steve Woodford, with some modification by me.
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 $ */
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/*
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* Copyright (c) 2003 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _DEV_I2C_I2C_BITBANG_H_
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#define _DEV_I2C_I2C_BITBANG_H_
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#define I2C_BIT_SDA 0 /* SDA signal */
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#define I2C_BIT_SCL 1 /* SCL signal */
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#define I2C_BIT_OUTPUT 2 /* controller: SDA is output */
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#define I2C_BIT_INPUT 3 /* controller: SDA is input */
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#define I2C_NBITS 4
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struct i2c_bitbang_ops {
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void (*ibo_set_bits)(void *, uint32_t);
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void (*ibo_set_dir)(void *, uint32_t);
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uint32_t (*ibo_read_bits)(void *);
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uint32_t ibo_bits[I2C_NBITS];
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};
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typedef const struct i2c_bitbang_ops *i2c_bitbang_ops_t;
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int i2c_bitbang_send_start(void *, int, i2c_bitbang_ops_t);
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int i2c_bitbang_send_stop(void *, int, i2c_bitbang_ops_t);
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int i2c_bitbang_initiate_xfer(void *, i2c_addr_t, int, i2c_bitbang_ops_t);
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int i2c_bitbang_read_byte(void *, uint8_t *, int, i2c_bitbang_ops_t);
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int i2c_bitbang_write_byte(void *, uint8_t, int, i2c_bitbang_ops_t);
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#endif /* _DEV_I2C_I2C_BITBANG_H_ */
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