1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START 3*7c478bd9Sstevel@tonic-gate * 4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*7c478bd9Sstevel@tonic-gate * with the License. 8*7c478bd9Sstevel@tonic-gate * 9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 12*7c478bd9Sstevel@tonic-gate * and limitations under the License. 13*7c478bd9Sstevel@tonic-gate * 14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*7c478bd9Sstevel@tonic-gate * 20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END 21*7c478bd9Sstevel@tonic-gate */ 22*7c478bd9Sstevel@tonic-gate /* 23*7c478bd9Sstevel@tonic-gate * Copyright (c) 2000 by Sun Microsystems, Inc. 24*7c478bd9Sstevel@tonic-gate * All rights reserved. 25*7c478bd9Sstevel@tonic-gate */ 26*7c478bd9Sstevel@tonic-gate 27*7c478bd9Sstevel@tonic-gate #ifndef _PCF8574_IMPL_H 28*7c478bd9Sstevel@tonic-gate #define _PCF8574_IMPL_H 29*7c478bd9Sstevel@tonic-gate 30*7c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 31*7c478bd9Sstevel@tonic-gate 32*7c478bd9Sstevel@tonic-gate #ifdef __cplusplus 33*7c478bd9Sstevel@tonic-gate extern "C" { 34*7c478bd9Sstevel@tonic-gate #endif 35*7c478bd9Sstevel@tonic-gate 36*7c478bd9Sstevel@tonic-gate #include <sys/i2c/clients/i2c_client.h> 37*7c478bd9Sstevel@tonic-gate 38*7c478bd9Sstevel@tonic-gate /* 39*7c478bd9Sstevel@tonic-gate * PCF8574_BIT_READ_MASK takes in a byte from the device and the bit that 40*7c478bd9Sstevel@tonic-gate * the user wants to read. I shifts the byte over so that the bit that we 41*7c478bd9Sstevel@tonic-gate * want is in the 1's bit and masks out the rest of the byte. 42*7c478bd9Sstevel@tonic-gate */ 43*7c478bd9Sstevel@tonic-gate #define PCF8574_BIT_READ_MASK(byte, bit) ((byte >> bit) & 0x01) 44*7c478bd9Sstevel@tonic-gate 45*7c478bd9Sstevel@tonic-gate /* 46*7c478bd9Sstevel@tonic-gate * PCF8574_BIT_WRITE_MASK takes in a byte from the device, the bit that the 47*7c478bd9Sstevel@tonic-gate * user wants to read write, and the value that the user wants put into that 48*7c478bd9Sstevel@tonic-gate * bit. It zero's out the bit that we are writing to in the byte and then or's 49*7c478bd9Sstevel@tonic-gate * the value(which was shifted to the bit location we wanted) to fill in only 50*7c478bd9Sstevel@tonic-gate * that bit in the byte 51*7c478bd9Sstevel@tonic-gate */ 52*7c478bd9Sstevel@tonic-gate #define PCF8574_BIT_WRITE_MASK(byte, bit, value)\ 53*7c478bd9Sstevel@tonic-gate ((value << bit) | (byte & (~(0x01 << bit)))) 54*7c478bd9Sstevel@tonic-gate 55*7c478bd9Sstevel@tonic-gate struct pcf8574_unit { 56*7c478bd9Sstevel@tonic-gate kmutex_t pcf8574_mutex; 57*7c478bd9Sstevel@tonic-gate uint8_t pcf8574_flags; 58*7c478bd9Sstevel@tonic-gate int pcf8574_oflag; 59*7c478bd9Sstevel@tonic-gate i2c_client_hdl_t pcf8574_hdl; 60*7c478bd9Sstevel@tonic-gate char pcf8574_name[24]; 61*7c478bd9Sstevel@tonic-gate }; 62*7c478bd9Sstevel@tonic-gate 63*7c478bd9Sstevel@tonic-gate #ifdef DEBUG 64*7c478bd9Sstevel@tonic-gate 65*7c478bd9Sstevel@tonic-gate static int pcf8574debug = 0; 66*7c478bd9Sstevel@tonic-gate #define D1CMN_ERR(ARGS) if (pcf8574debug & 0x1) cmn_err ARGS; 67*7c478bd9Sstevel@tonic-gate #define D2CMN_ERR(ARGS) if (pcf8574debug & 0x2) cmn_err ARGS; 68*7c478bd9Sstevel@tonic-gate 69*7c478bd9Sstevel@tonic-gate #else 70*7c478bd9Sstevel@tonic-gate 71*7c478bd9Sstevel@tonic-gate #define D1CMN_ERR(ARGS) 72*7c478bd9Sstevel@tonic-gate #define D2CMN_ERR(ARGS) 73*7c478bd9Sstevel@tonic-gate 74*7c478bd9Sstevel@tonic-gate #endif 75*7c478bd9Sstevel@tonic-gate 76*7c478bd9Sstevel@tonic-gate 77*7c478bd9Sstevel@tonic-gate #ifdef __cplusplus 78*7c478bd9Sstevel@tonic-gate } 79*7c478bd9Sstevel@tonic-gate #endif 80*7c478bd9Sstevel@tonic-gate 81*7c478bd9Sstevel@tonic-gate #endif /* _PCF8574_IMPL_H */ 82