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/*
i2c-sensor.h - Part of the i2c package
was originally sensors.h - Part of lm_sensors, Linux kernel modules
for hardware monitoring
Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
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 _LINUX_I2C_SENSOR_H
#define _LINUX_I2C_SENSOR_H
/* A structure containing detect information.
Force variables overrule all other variables; they force a detection on
that place. If a specific chip is given, the module blindly assumes this
chip type is present; if a general force (kind == 0) is given, the module
will still try to figure out what type of chip is present. This is useful
if for some reasons the detect for SMBus address space filled fails.
probe: insmod parameter. Initialize this list with I2C_CLIENT_END values.
A list of pairs. The first value is a bus number (ANY_I2C_BUS for any
I2C bus), the second is the address.
kind: The kind of chip. 0 equals any chip.
*/
struct i2c_force_data {
unsigned short *force;
unsigned short kind;
};
/* A structure containing the detect information.
normal_i2c: filled in by the module writer. Terminated by I2C_CLIENT_END.
A list of I2C addresses which should normally be examined.
probe: insmod parameter. Initialize this list with I2C_CLIENT_END values.
A list of pairs. The first value is a bus number (ANY_I2C_BUS for any
I2C bus), the second is the address. These addresses are also probed,
as if they were in the 'normal' list.
ignore: insmod parameter. Initialize this list with I2C_CLIENT_END values.
A list of pairs. The first value is a bus number (ANY_I2C_BUS for any
I2C bus), the second is the I2C address. These addresses are never
probed. This parameter overrules 'normal' and probe', but not the
'force' lists.
force_data: insmod parameters. A list, ending with an element of which
the force field is NULL.
*/
struct i2c_address_data {
unsigned short *normal_i2c;
unsigned short *probe;
unsigned short *ignore;
struct i2c_force_data *forces;
};
#define SENSORS_MODULE_PARM_FORCE(name) \
I2C_CLIENT_MODULE_PARM(force_ ## name, \
"List of adapter,address pairs which are unquestionably" \
" assumed to contain a `" # name "' chip")
/* This defines several insmod variables, and the addr_data structure */
#define SENSORS_INSMOD \
I2C_CLIENT_MODULE_PARM(probe, \
"List of adapter,address pairs to scan additionally"); \
I2C_CLIENT_MODULE_PARM(ignore, \
"List of adapter,address pairs not to scan"); \
static struct i2c_address_data addr_data = { \
.normal_i2c = normal_i2c, \
.probe = probe, \
.ignore = ignore, \
.forces = forces, \
}
/* The following functions create an enum with the chip names as elements.
The first element of the enum is any_chip. These are the only macros
a module will want to use. */
#define SENSORS_INSMOD_0 \
enum chips { any_chip }; \
I2C_CLIENT_MODULE_PARM(force, \
"List of adapter,address pairs to boldly assume " \
"to be present"); \
static struct i2c_force_data forces[] = {{force,any_chip},{NULL}}; \
SENSORS_INSMOD
#define SENSORS_INSMOD_1(chip1) \
enum chips { any_chip, chip1 }; \
I2C_CLIENT_MODULE_PARM(force, \
"List of adapter,address pairs to boldly assume " \
"to be present"); \
SENSORS_MODULE_PARM_FORCE(chip1); \
static struct i2c_force_data forces[] = {{force,any_chip},\
{force_ ## chip1,chip1}, \
{NULL}}; \
SENSORS_INSMOD
#define SENSORS_INSMOD_2(chip1,chip2) \
enum chips { any_chip, chip1, chip2 }; \
I2C_CLIENT_MODULE_PARM(force, \
"List of adapter,address pairs to boldly assume " \
"to be present"); \
SENSORS_MODULE_PARM_FORCE(chip1); \
SENSORS_MODULE_PARM_FORCE(chip2); \
static struct i2c_force_data forces[] = {{force,any_chip}, \
{force_ ## chip1,chip1}, \
{force_ ## chip2,chip2}, \
{NULL}}; \
SENSORS_INSMOD
#define SENSORS_INSMOD_3(chip1,chip2,chip3) \
enum chips { any_chip, chip1, chip2, chip3 }; \
I2C_CLIENT_MODULE_PARM(force, \
"List of adapter,address pairs to boldly assume " \
"to be present"); \
SENSORS_MODULE_PARM_FORCE(chip1); \
SENSORS_MODULE_PARM_FORCE(chip2); \
SENSORS_MODULE_PARM_FORCE(chip3); \
static struct i2c_force_data forces[] = {{force,any_chip}, \
{force_ ## chip1,chip1}, \
{force_ ## chip2,chip2}, \
{force_ ## chip3,chip3}, \
{NULL}}; \
SENSORS_INSMOD
#define SENSORS_INSMOD_4(chip1,chip2,chip3,chip4) \
enum chips { any_chip, chip1, chip2, chip3, chip4 }; \
I2C_CLIENT_MODULE_PARM(force, \
"List of adapter,address pairs to boldly assume " \
"to be present"); \
SENSORS_MODULE_PARM_FORCE(chip1); \
SENSORS_MODULE_PARM_FORCE(chip2); \
SENSORS_MODULE_PARM_FORCE(chip3); \
SENSORS_MODULE_PARM_FORCE(chip4); \
static struct i2c_force_data forces[] = {{force,any_chip}, \
{force_ ## chip1,chip1}, \
{force_ ## chip2,chip2}, \
{force_ ## chip3,chip3}, \
{force_ ## chip4,chip4}, \
{NULL}}; \
SENSORS_INSMOD
#define SENSORS_INSMOD_5(chip1,chip2,chip3,chip4,chip5) \
enum chips { any_chip, chip1, chip2, chip3, chip4, chip5 }; \
I2C_CLIENT_MODULE_PARM(force, \
"List of adapter,address pairs to boldly assume " \
"to be present"); \
SENSORS_MODULE_PARM_FORCE(chip1); \
SENSORS_MODULE_PARM_FORCE(chip2); \
SENSORS_MODULE_PARM_FORCE(chip3); \
SENSORS_MODULE_PARM_FORCE(chip4); \
SENSORS_MODULE_PARM_FORCE(chip5); \
static struct i2c_force_data forces[] = {{force,any_chip}, \
{force_ ## chip1,chip1}, \
{force_ ## chip2,chip2}, \
{force_ ## chip3,chip3}, \
{force_ ## chip4,chip4}, \
{force_ ## chip5,chip5}, \
{NULL}}; \
SENSORS_INSMOD
#define SENSORS_INSMOD_6(chip1,chip2,chip3,chip4,chip5,chip6) \
enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6 }; \
I2C_CLIENT_MODULE_PARM(force, \
"List of adapter,address pairs to boldly assume " \
"to be present"); \
SENSORS_MODULE_PARM_FORCE(chip1); \
SENSORS_MODULE_PARM_FORCE(chip2); \
SENSORS_MODULE_PARM_FORCE(chip3); \
SENSORS_MODULE_PARM_FORCE(chip4); \
SENSORS_MODULE_PARM_FORCE(chip5); \
SENSORS_MODULE_PARM_FORCE(chip6); \
static struct i2c_force_data forces[] = {{force,any_chip}, \
{force_ ## chip1,chip1}, \
{force_ ## chip2,chip2}, \
{force_ ## chip3,chip3}, \
{force_ ## chip4,chip4}, \
{force_ ## chip5,chip5}, \
{force_ ## chip6,chip6}, \
{NULL}}; \
SENSORS_INSMOD
#define SENSORS_INSMOD_7(chip1,chip2,chip3,chip4,chip5,chip6,chip7) \
enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6, chip7 }; \
I2C_CLIENT_MODULE_PARM(force, \
"List of adapter,address pairs to boldly assume " \
"to be present"); \
SENSORS_MODULE_PARM_FORCE(chip1); \
SENSORS_MODULE_PARM_FORCE(chip2); \
SENSORS_MODULE_PARM_FORCE(chip3); \
SENSORS_MODULE_PARM_FORCE(chip4); \
SENSORS_MODULE_PARM_FORCE(chip5); \
SENSORS_MODULE_PARM_FORCE(chip6); \
SENSORS_MODULE_PARM_FORCE(chip7); \
static struct i2c_force_data forces[] = {{force,any_chip}, \
{force_ ## chip1,chip1}, \
{force_ ## chip2,chip2}, \
{force_ ## chip3,chip3}, \
{force_ ## chip4,chip4}, \
{force_ ## chip5,chip5}, \
{force_ ## chip6,chip6}, \
{force_ ## chip7,chip7}, \
{NULL}}; \
SENSORS_INSMOD
#define SENSORS_INSMOD_8(chip1,chip2,chip3,chip4,chip5,chip6,chip7,chip8) \
enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6, chip7, chip8 }; \
I2C_CLIENT_MODULE_PARM(force, \
"List of adapter,address pairs to boldly assume " \
"to be present"); \
SENSORS_MODULE_PARM_FORCE(chip1); \
SENSORS_MODULE_PARM_FORCE(chip2); \
SENSORS_MODULE_PARM_FORCE(chip3); \
SENSORS_MODULE_PARM_FORCE(chip4); \
SENSORS_MODULE_PARM_FORCE(chip5); \
SENSORS_MODULE_PARM_FORCE(chip6); \
SENSORS_MODULE_PARM_FORCE(chip7); \
SENSORS_MODULE_PARM_FORCE(chip8); \
static struct i2c_force_data forces[] = {{force,any_chip}, \
{force_ ## chip1,chip1}, \
{force_ ## chip2,chip2}, \
{force_ ## chip3,chip3}, \
{force_ ## chip4,chip4}, \
{force_ ## chip5,chip5}, \
{force_ ## chip6,chip6}, \
{force_ ## chip7,chip7}, \
{force_ ## chip8,chip8}, \
{NULL}}; \
SENSORS_INSMOD
/* Detect function. It iterates over all possible addresses itself. For
SMBus addresses, it will only call found_proc if some client is connected
to the SMBus (unless a 'force' matched). */
extern int i2c_detect(struct i2c_adapter *adapter,
struct i2c_address_data *address_data,
int (*found_proc) (struct i2c_adapter *, int, int));
/* This macro is used to scale user-input to sensible values in almost all
chip drivers. */
static inline int SENSORS_LIMIT(long value, long low, long high)
{
if (value < low)
return low;
else if (value > high)
return high;
else
return value;
}
#endif /* def _LINUX_I2C_SENSOR_H */
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