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_ */
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