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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2000 by Sun Microsystems, Inc.
* All rights reserved.
*/
#ifndef _PCF8574_IMPL_H
#define _PCF8574_IMPL_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
#include <sys/i2c/clients/i2c_client.h>
/*
* PCF8574_BIT_READ_MASK takes in a byte from the device and the bit that
* the user wants to read. I shifts the byte over so that the bit that we
* want is in the 1's bit and masks out the rest of the byte.
*/
#define PCF8574_BIT_READ_MASK(byte, bit) ((byte >> bit) & 0x01)
/*
* PCF8574_BIT_WRITE_MASK takes in a byte from the device, the bit that the
* user wants to read write, and the value that the user wants put into that
* bit. It zero's out the bit that we are writing to in the byte and then or's
* the value(which was shifted to the bit location we wanted) to fill in only
* that bit in the byte
*/
#define PCF8574_BIT_WRITE_MASK(byte, bit, value)\
((value << bit) | (byte & (~(0x01 << bit))))
struct pcf8574_unit {
kmutex_t pcf8574_mutex;
uint8_t pcf8574_flags;
int pcf8574_oflag;
i2c_client_hdl_t pcf8574_hdl;
char pcf8574_name[24];
};
#ifdef DEBUG
static int pcf8574debug = 0;
#define D1CMN_ERR(ARGS) if (pcf8574debug & 0x1) cmn_err ARGS;
#define D2CMN_ERR(ARGS) if (pcf8574debug & 0x2) cmn_err ARGS;
#else
#define D1CMN_ERR(ARGS)
#define D2CMN_ERR(ARGS)
#endif
#ifdef __cplusplus
}
#endif
#endif /* _PCF8574_IMPL_H */
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