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Annotation of sys/dev/i2c/i2c_bitbang.h, Revision 1.1.1.1

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_ */