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- /* $OpenBSD: i2c_io.h,v 1.1 2004/05/23 17:33:43 grange Exp $ */
- /* $NetBSD: i2c_io.h,v 1.1 2003/09/30 00:35:31 thorpej Exp $ */
- /*
- * Copyright (c) 2003 Wasabi Systems, Inc.
- * All rights reserved.
- *
- * Written by Jason R. Thorpe for Wasabi Systems, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed for the NetBSD Project by
- * Wasabi Systems, Inc.
- * 4. The name of Wasabi Systems, Inc. may not be used to endorse
- * or promote products derived from this software without specific prior
- * written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
- #ifndef _DEV_I2C_I2C_IO_H_
- #define _DEV_I2C_I2C_IO_H_
- #include <sys/ioccom.h>
- /* I2C bus address. */
- typedef uint16_t i2c_addr_t;
- /* High-level I2C operations. */
- typedef enum {
- I2C_OP_READ = 0,
- I2C_OP_READ_WITH_STOP = 1,
- I2C_OP_WRITE = 2,
- I2C_OP_WRITE_WITH_STOP = 3,
- } i2c_op_t;
- #define I2C_OP_READ_P(x) (((int)(x) & 2) == 0)
- #define I2C_OP_WRITE_P(x) (! I2C_OP_READ_P(x))
- #define I2C_OP_STOP_P(x) (((int)(x) & 1) != 0)
- /*
- * This structure describes a single I2C control script fragment.
- *
- * Note that use of this scripted API allows for support of automated
- * SMBus controllers. The following table maps SMBus operations to
- * script fragment configuration:
- *
- * SMBus "write byte": I2C_OP_WRITE_WITH_STOP
- * cmdlen = 1
- *
- * SMBus "read byte": I2C_OP_READ_WITH_STOP
- * cmdlen = 1
- *
- * SMBus "receive byte": I2C_OP_READ_WITH_STOP
- * cmdlen = 0
- *
- * Note that while each of these 3 SMBus operations implies a STOP
- * (which an automated controller will likely perform automatically),
- * non-SMBus clients may continue to function even if they issue
- * I2C_OP_WRITE and I2C_OP_READ.
- */
- #ifdef notyet
- /*
- * I2C_IOCTL_EXEC:
- *
- * User ioctl to execute an i2c operation.
- */
- typedef struct i2c_ioctl_exec {
- i2c_op_t iie_op; /* operation to perform */
- i2c_addr_t iie_addr; /* address of device */
- const void *iie_cmd; /* pointer to command */
- size_t iie_cmdlen; /* length of command */
- void *iie_buf; /* pointer to data buffer */
- size_t iie_buflen; /* length of data buffer */
- } i2c_ioctl_exec_t;
- #define I2C_EXEC_MAX_CMDLEN 32
- #define I2C_EXEC_MAX_BUFLEN 32
- #define I2C_IOCTL_EXEC _IOW('I', 0, i2c_ioctl_exec_t)
- #endif
- #endif /* _DEV_I2C_I2C_IO_H_ */
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