root/lm-sensors/branches/lm-sensors-3.0.0/lib/sensors.h @ 4859

/*
    sensors.h - Part of libsensors, a Linux library for reading sensor data.
    Copyright (c) 1998, 1999  Frodo Looijaard <frodol@dds.nl>
    Copyright (C) 2007        Jean Delvare <khali@linux-fr.org>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#ifndef LIB_SENSORS_SENSORS_H
#define LIB_SENSORS_SENSORS_H

#include <stdio.h>
#include <limits.h>

/* Publicly accessible library functions */

#define SENSORS_CHIP_NAME_PREFIX_ANY NULL
#define SENSORS_CHIP_NAME_ADDR_ANY -1

#define SENSORS_BUS_TYPE_ANY    (-1)
#define SENSORS_BUS_TYPE_I2C    0
#define SENSORS_BUS_TYPE_ISA    1
#define SENSORS_BUS_TYPE_PCI    2
#define SENSORS_BUS_TYPE_SPI    3
#define SENSORS_BUS_NR_ANY      (-1)
#define SENSORS_BUS_NR_IGNORE   (-2)

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

extern const char *libsensors_version;

typedef struct sensors_bus_id {
        short type;
        short nr;
} sensors_bus_id;

/* A chip name is encoded in this structure */
typedef struct sensors_chip_name {
        char *prefix;
        sensors_bus_id bus;
        int addr;
        char *path;
} sensors_chip_name;

/* Load the configuration file and the detected chips list. If this
   returns a value unequal to zero, you are in trouble; you can not
   assume anything will be initialized properly. If you want to
   reload the configuration file, call sensors_cleanup() below before
   calling sensors_init() again. */
int sensors_init(FILE *input);

/* Clean-up function: You can't access anything after
   this, until the next sensors_init() call! */
void sensors_cleanup(void);

/* Parse a chip name to the internal representation. Return 0 on success, <0
   on error. */
int sensors_parse_chip_name(const char *orig_name, sensors_chip_name *res);

/* Print a chip name from its internal representation. Note that chip should
   not contain wildcard values! Return the number of characters printed on
   success (same as snprintf), <0 on error. */
int sensors_snprintf_chip_name(char *str, size_t size,
                               const sensors_chip_name *chip);

/* This function returns the adapter name of a bus,
   as used within the sensors_chip_name structure. If it could not be found,
   it returns NULL */
const char *sensors_get_adapter_name(const sensors_bus_id *bus);

typedef struct sensors_feature sensors_feature;

/* Look up the label for a given feature. Note that chip should not
   contain wildcard values! The returned string is newly allocated (free it
   yourself). On failure, NULL is returned.
   If no label exists for this feature, its name is returned itself. */
char *sensors_get_label(const sensors_chip_name *name,
                        const sensors_feature *feature);

/* Read the value of a subfeature of a certain chip. Note that chip should not
   contain wildcard values! This function will return 0 on success, and <0
   on failure.  */
int sensors_get_value(const sensors_chip_name *name, int subfeat_nr,
                      double *value);

/* Set the value of a subfeature of a certain chip. Note that chip should not
   contain wildcard values! This function will return 0 on success, and <0
   on failure. */
int sensors_set_value(const sensors_chip_name *name, int subfeat_nr,
                      double value);

/* Execute all set statements for this particular chip. The chip may contain
   wildcards!  This function will return 0 on success, and <0 on failure. */
int sensors_do_chip_sets(const sensors_chip_name *name);

/* This function returns all detected chips that match a given chip name,
   one by one. If no chip name is provided, all detected chips are returned.
   To start at the beginning of the list, use 0 for nr; NULL is returned if
   we are at the end of the list. Do not try to change these chip names, as
   they point to internal structures! */
const sensors_chip_name *sensors_get_detected_chips(const sensors_chip_name
                                                    *match, int *nr);

/* These defines are used in the flags field of sensors_subfeature */
#define SENSORS_MODE_R                  1
#define SENSORS_MODE_W                  2
#define SENSORS_COMPUTE_MAPPING         4

/* This define is used in the mapping field of sensors_subfeature if no
   mapping is available */
#define SENSORS_NO_MAPPING -1

typedef enum sensors_feature_type {
        SENSORS_FEATURE_IN              = 0x00,
        SENSORS_FEATURE_FAN             = 0x01,
        SENSORS_FEATURE_TEMP            = 0x02,
        SENSORS_FEATURE_VID             = 0x10,
        SENSORS_FEATURE_BEEP_ENABLE     = 0x18,
        SENSORS_FEATURE_UNKNOWN         = INT_MAX,
} sensors_feature_type;

/* All the sensor types (in, fan, temp, vid) are a multiple of 0x100 apart,
   and sensor subfeatures which have no compute mapping have bit 7 set. */
typedef enum sensors_subfeature_type {
        SENSORS_SUBFEATURE_IN_INPUT = SENSORS_FEATURE_IN << 8,
        SENSORS_SUBFEATURE_IN_MIN,
        SENSORS_SUBFEATURE_IN_MAX,
        SENSORS_SUBFEATURE_IN_ALARM = (SENSORS_FEATURE_IN << 8) | 0x80,
        SENSORS_SUBFEATURE_IN_MIN_ALARM,
        SENSORS_SUBFEATURE_IN_MAX_ALARM,
        SENSORS_SUBFEATURE_IN_BEEP,

        SENSORS_SUBFEATURE_FAN_INPUT = SENSORS_FEATURE_FAN << 8,
        SENSORS_SUBFEATURE_FAN_MIN,
        SENSORS_SUBFEATURE_FAN_ALARM = (SENSORS_FEATURE_FAN << 8) | 0x80,
        SENSORS_SUBFEATURE_FAN_FAULT,
        SENSORS_SUBFEATURE_FAN_DIV,
        SENSORS_SUBFEATURE_FAN_BEEP,

        SENSORS_SUBFEATURE_TEMP_INPUT = SENSORS_FEATURE_TEMP << 8,
        SENSORS_SUBFEATURE_TEMP_MAX,
        SENSORS_SUBFEATURE_TEMP_MAX_HYST,
        SENSORS_SUBFEATURE_TEMP_MIN,
        SENSORS_SUBFEATURE_TEMP_CRIT,
        SENSORS_SUBFEATURE_TEMP_CRIT_HYST,
        SENSORS_SUBFEATURE_TEMP_ALARM = (SENSORS_FEATURE_TEMP << 8) | 0x80,
        SENSORS_SUBFEATURE_TEMP_MAX_ALARM,
        SENSORS_SUBFEATURE_TEMP_MIN_ALARM,
        SENSORS_SUBFEATURE_TEMP_CRIT_ALARM,
        SENSORS_SUBFEATURE_TEMP_FAULT,
        SENSORS_SUBFEATURE_TEMP_TYPE,
        SENSORS_SUBFEATURE_TEMP_OFFSET,
        SENSORS_SUBFEATURE_TEMP_BEEP,

        SENSORS_SUBFEATURE_VID = SENSORS_FEATURE_VID << 8,

        SENSORS_SUBFEATURE_BEEP_ENABLE = SENSORS_FEATURE_BEEP_ENABLE << 8,

        SENSORS_SUBFEATURE_UNKNOWN = INT_MAX,
} sensors_subfeature_type;

/* Data about a single chip feature (or category leader) */
struct sensors_feature {
        char *name;
        int number;
        sensors_feature_type type;
        /* Members below are for libsensors internal use only */
        int first_subfeature;
        int padding1;
};

/* Data about a single chip subfeature:
   name is the string name used to refer to this subfeature (in config files)
   number is the internal subfeature number, used in many functions to refer
     to this subfeature
   type is the subfeature type
   mapping is either SENSORS_NO_MAPPING if this subfeature is the
     main element of category; or it is the number of a subfeature with which
     this subfeature is logically grouped (a group could be fan, fan_min
     and fan_div)
   flags is a bitfield, its value is a combination of SENSORS_MODE_R (readable),
     SENSORS_MODE_W (writable) and SENSORS_COMPUTE_MAPPING (affected by the
     computation rules of the main feature) */
typedef struct sensors_subfeature {
        char *name;
        int number;
        sensors_subfeature_type type;
        int mapping;
        unsigned int flags;
} sensors_subfeature;

/* This returns all main features of a specific chip. nr is an internally
   used variable. Set it to zero to start at the begin of the list. If no
   more features are found NULL is returned.
   Do not try to change the returned structure; you will corrupt internal
   data structures. */
const sensors_feature *
sensors_get_features(const sensors_chip_name *name, int *nr);

/* This returns all subfeatures of a given main feature. nr is an internally
   used variable. Set it to zero to start at the begin of the list. If no
   more features are found NULL is returned.
   Do not try to change the returned structure; you will corrupt internal
   data structures. */
const sensors_subfeature *
sensors_get_all_subfeatures(const sensors_chip_name *name,
                            const sensors_feature *feature, int *nr);

/* This returns the subfeature of the given type for a given main feature,
   if it exists, NULL otherwise.
   Do not try to change the returned structure; you will corrupt internal
   data structures. */
const sensors_subfeature *
sensors_get_subfeature(const sensors_chip_name *name,
                       const sensors_feature *feature,
                       sensors_subfeature_type type);

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* def LIB_SENSORS_ERROR_H */