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Annotation of sys/dev/i2c/i2c_bitbang.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: i2c_bitbang.h,v 1.3 2006/01/13 23:56:46 grange Exp $  */
        !             2: /*     $NetBSD: i2c_bitbang.h,v 1.1 2003/09/30 00:35:31 thorpej Exp $  */
        !             3:
        !             4: /*
        !             5:  * Copyright (c) 2003 Wasabi Systems, Inc.
        !             6:  * All rights reserved.
        !             7:  *
        !             8:  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
        !             9:  *
        !            10:  * Redistribution and use in source and binary forms, with or without
        !            11:  * modification, are permitted provided that the following conditions
        !            12:  * are met:
        !            13:  * 1. Redistributions of source code must retain the above copyright
        !            14:  *    notice, this list of conditions and the following disclaimer.
        !            15:  * 2. Redistributions in binary form must reproduce the above copyright
        !            16:  *    notice, this list of conditions and the following disclaimer in the
        !            17:  *    documentation and/or other materials provided with the distribution.
        !            18:  * 3. All advertising materials mentioning features or use of this software
        !            19:  *    must display the following acknowledgement:
        !            20:  *      This product includes software developed for the NetBSD Project by
        !            21:  *      Wasabi Systems, Inc.
        !            22:  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
        !            23:  *    or promote products derived from this software without specific prior
        !            24:  *    written permission.
        !            25:  *
        !            26:  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
        !            27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
        !            28:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
        !            29:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
        !            30:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
        !            31:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
        !            32:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
        !            33:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
        !            34:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
        !            35:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
        !            36:  * POSSIBILITY OF SUCH DAMAGE.
        !            37:  */
        !            38:
        !            39: #ifndef _DEV_I2C_I2C_BITBANG_H_
        !            40: #define        _DEV_I2C_I2C_BITBANG_H_
        !            41:
        !            42: #define        I2C_BIT_SDA             0       /* SDA signal */
        !            43: #define        I2C_BIT_SCL             1       /* SCL signal */
        !            44: #define        I2C_BIT_OUTPUT          2       /* controller: SDA is output */
        !            45: #define        I2C_BIT_INPUT           3       /* controller: SDA is input */
        !            46: #define        I2C_NBITS               4
        !            47:
        !            48: struct i2c_bitbang_ops {
        !            49:        void            (*ibo_set_bits)(void *, uint32_t);
        !            50:        void            (*ibo_set_dir)(void *, uint32_t);
        !            51:        uint32_t        (*ibo_read_bits)(void *);
        !            52:        uint32_t        ibo_bits[I2C_NBITS];
        !            53: };
        !            54:
        !            55: typedef const struct i2c_bitbang_ops *i2c_bitbang_ops_t;
        !            56:
        !            57: int    i2c_bitbang_send_start(void *, int, i2c_bitbang_ops_t);
        !            58: int    i2c_bitbang_send_stop(void *, int, i2c_bitbang_ops_t);
        !            59: int    i2c_bitbang_initiate_xfer(void *, i2c_addr_t, int, i2c_bitbang_ops_t);
        !            60: int    i2c_bitbang_read_byte(void *, uint8_t *, int, i2c_bitbang_ops_t);
        !            61: int    i2c_bitbang_write_byte(void *, uint8_t, int, i2c_bitbang_ops_t);
        !            62:
        !            63: #endif /* _DEV_I2C_I2C_BITBANG_H_ */