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_ */
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