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/* $OpenBSD: lm75reg.h,v 1.2 2005/11/11 16:14:14 kettenis Exp $ */
/* $NetBSD: lm75reg.h,v 1.1 2003/09/30 00:35:31 thorpej Exp $ */
/*
* Copyright (c) 2004 Alexander Yurchenko <grange@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* 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_LM75REG_H_
#define _DEV_I2C_LM75REG_H_
#define LM_MODEL_LM75 1
#define LM_MODEL_LM77 2
#define LM_POLLTIME 2 /* 2s */
/*
* LM75 temperature sensor I2C address:
*
* 100 1xxx
*/
#define LM75_ADDRMASK 0x78
#define LM75_ADDR 0x48
/*
* LM77 temperature sensor I2C address:
*
* 100 10xx
*/
#define LM77_ADDRMASK 0x7c
#define LM77_ADDR 0x48
/*
* Temperature on the LM75 is represented by a 9-bit two's complement
* integer in steps of 0.5C. The following examples are taken from
* the LM75 data sheet:
*
* +125C 0 1111 1010 0x0fa
* +25C 0 0011 0010 0x032
* +0.5C 0 0000 0001 0x001
* 0C 0 0000 0000 0x000
* -0.5C 1 1111 1111 0x1ff
* -25C 1 1100 1110 0x1ce
* -55C 1 1001 0010 0x192
*
* Temperature on the LM77 is represented by a 10-bit two's complement
* integer in steps of 0.5C:
*
* +130C 01 0000 0100 0x104
* +125C 00 1111 1010 0x0fa
* +25C 00 0011 0010 0x032
* +0.5C 00 0000 0001 0x001
* 0C 00 0000 0000 0x000
* -0.5C 11 1111 1111 0x3ff
* -25C 11 1100 1110 0x3ce
* -55C 11 1001 0010 0x392
*/
#define LM75_REG_TEMP 0x00
#define LM75_REG_CONFIG 0x01
#define LM75_REG_THYST_SET_POINT 0x02
#define LM75_REG_TOS_SET_POINT 0x03
#define LM77_REG_TLOW 0x04
#define LM77_REG_THIGH 0x05
#define LM77_TEMP_ST_LOW 0x01
#define LM77_TEMP_ST_HIGH 0x02
#define LM77_TEMP_ST_CRIT 0x04
#define LM75_TEMP_LEN 2 /* 2 data bytes */
#define LM75_CONFIG_SHUTDOWN 0x01
#define LM75_CONFIG_CMPINT 0x02
#define LM75_CONFIG_OSPOLARITY 0x04
#define LM75_CONFIG_FAULT_QUEUE_1 (0 << 3)
#define LM75_CONFIG_FAULT_QUEUE_2 (1 << 3)
#define LM75_CONFIG_FAULT_QUEUE_4 (2 << 3)
#define LM75_CONFIG_FAULT_QUEUE_6 (3 << 3)
#define LM77_CONFIG_INTPOLARITY 0x08
#define LM77_CONFIG_FAULT_QUEUE_4 0x10
/*
* LM75 temperature word:
*
* MSB Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 X X X X X X X
* 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
*
*
* LM77 temperature word:
*
* Sign Sign Sign Sign MSB Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Status bits
* 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
*/
static __inline int
lm75_wordtotemp(u_int16_t word)
{
return ((int16_t)word / 128);
}
static __inline u_int16_t
lm75_temptoword(int temp)
{
int sign = 0;
if (temp < 0) {
sign = 1;
temp = -temp;
};
return ((sign << 15 ) | ((temp & 0xff) << 7));
}
static __inline int
lm77_wordtotemp(u_int16_t word)
{
return ((int16_t)word / 8);
}
static __inline u_int16_t
lm77_temptoword(int temp)
{
int sign = 0;
if (temp < 0) {
sign = 0xf;
temp = -temp;
};
return ((sign << 12 ) | ((temp & 0x1ff) << 3));
}
#endif /* _DEV_I2C_LM75REG_H_ */
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