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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2019, Joyent, Inc.
*/
#ifndef _SYS_SENSORS_H
#define _SYS_SENSORS_H
/*
* Consolidated sensor ioctls for various parts of the operating system. These
* interfaces should not be relied on at all. They are evolving and will change
* as we add more to the system for this. This may eventually become a larger
* framework, though it's more likely we'll consolidate that in userland.
*/
#ifdef __cplusplus
extern "C" {
#endif
/*
* List of different possible kinds of sensors.
*/
#define SENSOR_KIND_UNKNOWN 0x00
#define SENSOR_KIND_TEMPERATURE 0x01
/*
* Lists of units that senors may have.
*/
#define SENSOR_UNIT_UNKNOWN 0x00
#define SENSOR_UNIT_CELSIUS 0x01
#define SENSOR_UNIT_FAHRENHEIT 0x02
#define SENSOR_UNIT_KELVIN 0x03
#define SENSOR_IOCTL (('s' << 24) | ('e' << 16) | ('n' << 8))
/*
* Ask the sensor what kind of sensor it is.
*/
#define SENSOR_IOCTL_TYPE (SENSOR_IOCTL | 0x01)
typedef struct sensor_ioctl_kind {
uint64_t sik_kind;
} sensor_ioctl_kind_t;
/*
* Ask the sensor for a temperature measurement. The sensor is responsible for
* returning the units it's in. A temperature measurement is broken down into a
* signed value and a notion of its granularity. The sit_gran member indicates
* the granularity: the number of increments per degree in the temperature
* measurement (the sit_temp member). sit_gran is signed and the sign indicates
* whether one needs to multiply or divide the granularity. For example, a
* value that set sit_gran to 10 would mean that the value in sit_temp was in
* 10ths of a degree and that to get the actual value in degrees, one would
* divide by 10. On the other hand, a negative value means that we effectively
* have to multiply to get there. For example, a value of -2 would indicate that
* each value in sit_temp indicated two degrees and to get the temperature in
* degrees you would multiply sit_temp by two.
*/
#define SENSOR_IOCTL_TEMPERATURE (SENSOR_IOCTL | 0x02)
typedef struct sensor_ioctl_temperature {
uint32_t sit_unit;
int32_t sit_gran;
int64_t sit_temp;
} sensor_ioctl_temperature_t;
#ifdef __cplusplus
}
#endif
#endif /* _SYS_SENSORS_H */
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