264 lines
12 KiB
C
264 lines
12 KiB
C
/*
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i2c-sensor.h - Part of the i2c package
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was originally sensors.h - Part of lm_sensors, Linux kernel modules
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for hardware monitoring
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Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef _LINUX_I2C_SENSOR_H
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#define _LINUX_I2C_SENSOR_H
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/* A structure containing detect information.
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Force variables overrule all other variables; they force a detection on
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that place. If a specific chip is given, the module blindly assumes this
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chip type is present; if a general force (kind == 0) is given, the module
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will still try to figure out what type of chip is present. This is useful
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if for some reasons the detect for SMBus or ISA address space filled
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fails.
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probe: insmod parameter. Initialize this list with I2C_CLIENT_ISA_END values.
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A list of pairs. The first value is a bus number (ANY_I2C_ISA_BUS for
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the ISA bus, -1 for any I2C bus), the second is the address.
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kind: The kind of chip. 0 equals any chip.
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*/
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struct i2c_force_data {
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unsigned short *force;
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unsigned short kind;
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};
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/* A structure containing the detect information.
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normal_i2c: filled in by the module writer. Terminated by I2C_CLIENT_ISA_END.
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A list of I2C addresses which should normally be examined.
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normal_isa: filled in by the module writer. Terminated by SENSORS_ISA_END.
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A list of ISA addresses which should normally be examined.
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probe: insmod parameter. Initialize this list with I2C_CLIENT_ISA_END values.
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A list of pairs. The first value is a bus number (ANY_I2C_ISA_BUS for
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the ISA bus, -1 for any I2C bus), the second is the address. These
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addresses are also probed, as if they were in the 'normal' list.
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ignore: insmod parameter. Initialize this list with I2C_CLIENT_ISA_END values.
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A list of pairs. The first value is a bus number (ANY_I2C_ISA_BUS for
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the ISA bus, -1 for any I2C bus), the second is the I2C address. These
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addresses are never probed. This parameter overrules 'normal' and
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'probe', but not the 'force' lists.
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force_data: insmod parameters. A list, ending with an element of which
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the force field is NULL.
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*/
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struct i2c_address_data {
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unsigned short *normal_i2c;
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unsigned int *normal_isa;
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unsigned short *probe;
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unsigned short *ignore;
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struct i2c_force_data *forces;
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};
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#define SENSORS_MODULE_PARM_FORCE(name) \
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I2C_CLIENT_MODULE_PARM(force_ ## name, \
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"List of adapter,address pairs which are unquestionably" \
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" assumed to contain a `" # name "' chip")
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/* This defines several insmod variables, and the addr_data structure */
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#define SENSORS_INSMOD \
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I2C_CLIENT_MODULE_PARM(probe, \
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"List of adapter,address pairs to scan additionally"); \
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I2C_CLIENT_MODULE_PARM(ignore, \
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"List of adapter,address pairs not to scan"); \
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static struct i2c_address_data addr_data = { \
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.normal_i2c = normal_i2c, \
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.normal_isa = normal_isa, \
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.probe = probe, \
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.ignore = ignore, \
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.forces = forces, \
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}
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/* The following functions create an enum with the chip names as elements.
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The first element of the enum is any_chip. These are the only macros
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a module will want to use. */
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#define SENSORS_INSMOD_0 \
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enum chips { any_chip }; \
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I2C_CLIENT_MODULE_PARM(force, \
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"List of adapter,address pairs to boldly assume " \
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"to be present"); \
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static struct i2c_force_data forces[] = {{force,any_chip},{NULL}}; \
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SENSORS_INSMOD
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#define SENSORS_INSMOD_1(chip1) \
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enum chips { any_chip, chip1 }; \
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I2C_CLIENT_MODULE_PARM(force, \
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"List of adapter,address pairs to boldly assume " \
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"to be present"); \
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SENSORS_MODULE_PARM_FORCE(chip1); \
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static struct i2c_force_data forces[] = {{force,any_chip},\
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{force_ ## chip1,chip1}, \
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{NULL}}; \
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SENSORS_INSMOD
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#define SENSORS_INSMOD_2(chip1,chip2) \
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enum chips { any_chip, chip1, chip2 }; \
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I2C_CLIENT_MODULE_PARM(force, \
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"List of adapter,address pairs to boldly assume " \
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"to be present"); \
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SENSORS_MODULE_PARM_FORCE(chip1); \
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SENSORS_MODULE_PARM_FORCE(chip2); \
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static struct i2c_force_data forces[] = {{force,any_chip}, \
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{force_ ## chip1,chip1}, \
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{force_ ## chip2,chip2}, \
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{NULL}}; \
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SENSORS_INSMOD
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#define SENSORS_INSMOD_3(chip1,chip2,chip3) \
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enum chips { any_chip, chip1, chip2, chip3 }; \
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I2C_CLIENT_MODULE_PARM(force, \
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"List of adapter,address pairs to boldly assume " \
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"to be present"); \
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SENSORS_MODULE_PARM_FORCE(chip1); \
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SENSORS_MODULE_PARM_FORCE(chip2); \
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SENSORS_MODULE_PARM_FORCE(chip3); \
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static struct i2c_force_data forces[] = {{force,any_chip}, \
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{force_ ## chip1,chip1}, \
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{force_ ## chip2,chip2}, \
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{force_ ## chip3,chip3}, \
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{NULL}}; \
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SENSORS_INSMOD
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#define SENSORS_INSMOD_4(chip1,chip2,chip3,chip4) \
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enum chips { any_chip, chip1, chip2, chip3, chip4 }; \
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I2C_CLIENT_MODULE_PARM(force, \
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"List of adapter,address pairs to boldly assume " \
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"to be present"); \
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SENSORS_MODULE_PARM_FORCE(chip1); \
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SENSORS_MODULE_PARM_FORCE(chip2); \
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SENSORS_MODULE_PARM_FORCE(chip3); \
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SENSORS_MODULE_PARM_FORCE(chip4); \
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static struct i2c_force_data forces[] = {{force,any_chip}, \
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{force_ ## chip1,chip1}, \
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{force_ ## chip2,chip2}, \
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{force_ ## chip3,chip3}, \
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{force_ ## chip4,chip4}, \
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{NULL}}; \
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SENSORS_INSMOD
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#define SENSORS_INSMOD_5(chip1,chip2,chip3,chip4,chip5) \
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enum chips { any_chip, chip1, chip2, chip3, chip4, chip5 }; \
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I2C_CLIENT_MODULE_PARM(force, \
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"List of adapter,address pairs to boldly assume " \
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"to be present"); \
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SENSORS_MODULE_PARM_FORCE(chip1); \
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SENSORS_MODULE_PARM_FORCE(chip2); \
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SENSORS_MODULE_PARM_FORCE(chip3); \
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SENSORS_MODULE_PARM_FORCE(chip4); \
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SENSORS_MODULE_PARM_FORCE(chip5); \
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static struct i2c_force_data forces[] = {{force,any_chip}, \
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{force_ ## chip1,chip1}, \
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{force_ ## chip2,chip2}, \
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{force_ ## chip3,chip3}, \
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{force_ ## chip4,chip4}, \
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{force_ ## chip5,chip5}, \
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{NULL}}; \
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SENSORS_INSMOD
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#define SENSORS_INSMOD_6(chip1,chip2,chip3,chip4,chip5,chip6) \
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enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6 }; \
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I2C_CLIENT_MODULE_PARM(force, \
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"List of adapter,address pairs to boldly assume " \
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"to be present"); \
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SENSORS_MODULE_PARM_FORCE(chip1); \
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SENSORS_MODULE_PARM_FORCE(chip2); \
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SENSORS_MODULE_PARM_FORCE(chip3); \
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SENSORS_MODULE_PARM_FORCE(chip4); \
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SENSORS_MODULE_PARM_FORCE(chip5); \
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SENSORS_MODULE_PARM_FORCE(chip6); \
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static struct i2c_force_data forces[] = {{force,any_chip}, \
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{force_ ## chip1,chip1}, \
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{force_ ## chip2,chip2}, \
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{force_ ## chip3,chip3}, \
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{force_ ## chip4,chip4}, \
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{force_ ## chip5,chip5}, \
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{force_ ## chip6,chip6}, \
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{NULL}}; \
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SENSORS_INSMOD
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#define SENSORS_INSMOD_7(chip1,chip2,chip3,chip4,chip5,chip6,chip7) \
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enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6, chip7 }; \
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I2C_CLIENT_MODULE_PARM(force, \
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"List of adapter,address pairs to boldly assume " \
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"to be present"); \
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SENSORS_MODULE_PARM_FORCE(chip1); \
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SENSORS_MODULE_PARM_FORCE(chip2); \
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SENSORS_MODULE_PARM_FORCE(chip3); \
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SENSORS_MODULE_PARM_FORCE(chip4); \
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SENSORS_MODULE_PARM_FORCE(chip5); \
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SENSORS_MODULE_PARM_FORCE(chip6); \
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SENSORS_MODULE_PARM_FORCE(chip7); \
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static struct i2c_force_data forces[] = {{force,any_chip}, \
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{force_ ## chip1,chip1}, \
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{force_ ## chip2,chip2}, \
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{force_ ## chip3,chip3}, \
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{force_ ## chip4,chip4}, \
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{force_ ## chip5,chip5}, \
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{force_ ## chip6,chip6}, \
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{force_ ## chip7,chip7}, \
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{NULL}}; \
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SENSORS_INSMOD
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#define SENSORS_INSMOD_8(chip1,chip2,chip3,chip4,chip5,chip6,chip7,chip8) \
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enum chips { any_chip, chip1, chip2, chip3, chip4, chip5, chip6, chip7, chip8 }; \
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I2C_CLIENT_MODULE_PARM(force, \
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"List of adapter,address pairs to boldly assume " \
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"to be present"); \
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SENSORS_MODULE_PARM_FORCE(chip1); \
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SENSORS_MODULE_PARM_FORCE(chip2); \
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SENSORS_MODULE_PARM_FORCE(chip3); \
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SENSORS_MODULE_PARM_FORCE(chip4); \
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SENSORS_MODULE_PARM_FORCE(chip5); \
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SENSORS_MODULE_PARM_FORCE(chip6); \
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SENSORS_MODULE_PARM_FORCE(chip7); \
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SENSORS_MODULE_PARM_FORCE(chip8); \
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static struct i2c_force_data forces[] = {{force,any_chip}, \
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{force_ ## chip1,chip1}, \
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{force_ ## chip2,chip2}, \
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{force_ ## chip3,chip3}, \
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{force_ ## chip4,chip4}, \
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{force_ ## chip5,chip5}, \
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{force_ ## chip6,chip6}, \
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{force_ ## chip7,chip7}, \
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{force_ ## chip8,chip8}, \
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{NULL}}; \
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SENSORS_INSMOD
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/* Detect function. It iterates over all possible addresses itself. For
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SMBus addresses, it will only call found_proc if some client is connected
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to the SMBus (unless a 'force' matched); for ISA detections, this is not
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done. */
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extern int i2c_detect(struct i2c_adapter *adapter,
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struct i2c_address_data *address_data,
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int (*found_proc) (struct i2c_adapter *, int, int));
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/* This macro is used to scale user-input to sensible values in almost all
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chip drivers. */
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static inline int SENSORS_LIMIT(long value, long low, long high)
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{
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if (value < low)
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return low;
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else if (value > high)
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return high;
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else
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return value;
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}
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#endif /* def _LINUX_I2C_SENSOR_H */
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