Kernel driver `lm78.o' ====================== Status: Complete and well-tested Supported chips: * National Semiconductors LM78 Prefix `lm78' Addresses scanned: I2C 0x20 - 0x2f (inclusive), ISA 0x290 (8 I/O ports) Datasheet: Publicly available at the National Semiconductors website * National Semiconductors LM78-J Prefix `lm78-j' Addresses scanned: I2C 0x20 - 0x2f (inclusive), ISA 0x290 (8 I/O ports) Datasheet: Publicly available at the National Semiconductors website * National Semiconductors LM79 Prefix `lm79' Addresses scanned: I2C 0x20 - 0x2f (inclusive), ISA 0x290 (8 I/O ports) Datasheet: Publicly available at the National Semiconductors website Author: Frodo Looijaard Module Parameters ----------------- * force: short array (min = 1, max = 48) List of adapter,address pairs to boldly assume to be present * force_lm78: short array (min = 1, max = 48) List of adapter,address pairs which are unquestionably assumed to contain a `lm78' chip * force_lm78j: short array (min = 1, max = 48) List of adapter,address pairs which are unquestionably assumed to contain a `lm78j' chip * force_lm79: short array (min = 1, max = 48) List of adapter,address pairs which are unquestionably assumed to contain a `lm79' chip * ignore: short array (min = 1, max = 48) List of adapter,address pairs not to scan * ignore_range: short array (min = 1, max = 48) List of adapter,start-addr,end-addr triples not to scan * probe: short array (min = 1, max = 48) List of adapter,address pairs to scan additionally * probe_range: short array (min = 1, max = 48) List of adapter,start-addr,end-addr triples to scan additionally Description ----------- This driver implements support for the National Semiconductors LM78, LM78-J and LM79. They are described as `Microprocessor System Hardware Monitors'. There is almost no difference between the three supported chips. Functionally, the LM78 and LM78-J are exactly identical. The LM79 has one more VID line, which is used to report the lower voltages newer Pentium processors use. From here on, LM7* means either of these three types. The LM7* implements one temperature sensor, three FAN rotation speed sensors, seven voltage sensors, VID lines, alarms, and some miscellaneous stuff. Temperatures are measured in degrees Celcius. An alarm is triggered once when the Overtemperature Shutdown limit is crossed; it is triggered again as soon as it drops below the Hysteresis value. A more useful behaviour can be found by setting the Hysteresis value to +127 degrees Celcius; in this case, alarms are issued during all the time when the actual temperature is above the Overtemperature Shutdown value. Measurements are guaranteed between -55 and +125 degrees, with a resolution of 1 degree. FAN rotation speeds are reported in RPM (rotations per minute). An alarm is triggered if the rotation speed has dropped below a programmable limit. FAN readings can be divided by a programmable divider (1, 2, 4 or 8) to give the readings more range or accuracy. This is important because some FANs report only one 'tick' each rotation, while others report two - making all readings twice as high. Not all RPM values can accurately be represented, so some rounding is done. With a divider of 2, the lowest representable value is around 2600 RPM. Voltage sensors (also known as IN sensors) report their values in volts. An alarm is triggered if the voltage has crossed a programmable minimum or maximum limit. Note that minimum in this case always means 'closest to zero'; this is important for negative voltage measurements. All voltage inputs can measure voltages between 0 and 4.08 volts, with a resolution of 0.016 volt. The VID lines encode the core voltage value: the voltage level your processor should work with. This is hardcoded by the mainboard and/or processor itself. It is a value in volts. When it is unconnected, you will often find the value 3.50 V here. In addition to the alarms described above, there are a couple of additional ones. There is a BTI alarm, which gets triggered when an external chip has crossed its limits. Usually, this is connected to all LM75 chips; if at least one crosses its limits, this bit gets set. The CHAS alarm triggers if your computer case is open. The FIFO alarms should never trigger; it indicates an internal error. The SMI_IN alarm indicates some other chip has triggered an SMI interrupt. As we do not use SMI interrupts at all, this condition usually indicates there is a problem with some other device. If an alarm triggers, it will remain triggered until the hardware register is read at least once. This means that the cause for the alarm may already have disappeared! Note that in the current implementation, all hardware registers are read whenever any data is read (unless it is less than 1.5 seconds since the last update). This means that you can easily miss once-only alarms. The LM7* only updates its values each 1.5 seconds; reading it more often will do no harm, but will return 'old' values. Chip features ------------- Chip `lm78' LABEL LABEL CLASS COMPUTE CLASS ACCESS MAGNITUDE in0 NONE NONE R 2 in1 NONE NONE R 2 in2 NONE NONE R 2 in3 NONE NONE R 2 in4 NONE NONE R 2 in5 NONE NONE R 2 in6 NONE NONE R 2 in0_min in0 in0 RW 2 in1_min in1 in1 RW 2 in2_min in2 in2 RW 2 in3_min in3 in3 RW 2 in4_min in4 in4 RW 2 in5_min in5 in5 RW 2 in6_min in6 in6 RW 2 in0_max in0 in0 RW 2 in1_max in1 in1 RW 2 in2_max in2 in2 RW 2 in3_max in3 in3 RW 2 in4_max in4 in4 RW 2 in5_max in5 in5 RW 2 in6_max in6 in6 RW 2 fan1 NONE NONE R 0 fan2 NONE NONE R 0 fan3 NONE NONE R 0 fan1_min fan1 fan1 RW 0 fan2_min fan2 fan2 RW 0 fan3_min fan3 fan3 RW 0 temp NONE NONE R 1 temp_hyst temp temp RW 1 temp_over temp temp RW 1 vid NONE NONE R 2 fan1_div fan1 NONE RW 0 fan2_div fan2 NONE RW 0 fan3_div fan3 NONE R 0 alarms NONE NONE R 0 LABEL FEATURE SYMBOL SYSCTL FILE:OFFSET in0 SENSORS_LM78_IN0 in0:3 in1 SENSORS_LM78_IN1 in1:3 in2 SENSORS_LM78_IN2 in2:3 in3 SENSORS_LM78_IN3 in3:3 in4 SENSORS_LM78_IN4 in4:3 in5 SENSORS_LM78_IN5 in5:3 in6 SENSORS_LM78_IN6 in6:3 in0_min SENSORS_LM78_IN0_MIN in0:1 in1_min SENSORS_LM78_IN1_MIN in1:1 in2_min SENSORS_LM78_IN2_MIN in2:1 in3_min SENSORS_LM78_IN3_MIN in3:1 in4_min SENSORS_LM78_IN4_MIN in4:1 in5_min SENSORS_LM78_IN5_MIN in5:1 in6_min SENSORS_LM78_IN6_MIN in6:1 in0_max SENSORS_LM78_IN0_MAX in0:2 in1_max SENSORS_LM78_IN1_MAX in1:2 in2_max SENSORS_LM78_IN2_MAX in2:2 in3_max SENSORS_LM78_IN3_MAX in3:2 in4_max SENSORS_LM78_IN4_MAX in4:2 in5_max SENSORS_LM78_IN5_MAX in5:2 in6_max SENSORS_LM78_IN6_MAX in6:2 fan1 SENSORS_LM78_FAN1 fan1:2 fan2 SENSORS_LM78_FAN2 fan2:2 fan3 SENSORS_LM78_FAN3 fan3:2 fan1_min SENSORS_LM78_FAN1_MIN fan1:1 fan2_min SENSORS_LM78_FAN2_MIN fan2:1 fan3_min SENSORS_LM78_FAN3_MIN fan3:1 temp SENSORS_LM78_TEMP temp:3 temp_hyst SENSORS_LM78_TEMP_HYST temp:2 temp_over SENSORS_LM78_TEMP_OVER temp:1 vid SENSORS_LM78_VID vid:1 fan1_div SENSORS_LM78_FAN1_DIV fan_div:1 fan2_div SENSORS_LM78_FAN2_DIV fan_div:2 fan3_div SENSORS_LM78_FAN3_DIV fan_div:3 alarms SENSORS_LM78_ALARMS alarms:1 Chip `lm78-j' LABEL LABEL CLASS COMPUTE CLASS ACCESS MAGNITUDE in0 NONE NONE R 2 in1 NONE NONE R 2 in2 NONE NONE R 2 in3 NONE NONE R 2 in4 NONE NONE R 2 in5 NONE NONE R 2 in6 NONE NONE R 2 in0_min in0 in0 RW 2 in1_min in1 in1 RW 2 in2_min in2 in2 RW 2 in3_min in3 in3 RW 2 in4_min in4 in4 RW 2 in5_min in5 in5 RW 2 in6_min in6 in6 RW 2 in0_max in0 in0 RW 2 in1_max in1 in1 RW 2 in2_max in2 in2 RW 2 in3_max in3 in3 RW 2 in4_max in4 in4 RW 2 in5_max in5 in5 RW 2 in6_max in6 in6 RW 2 fan1 NONE NONE R 0 fan2 NONE NONE R 0 fan3 NONE NONE R 0 fan1_min fan1 fan1 RW 0 fan2_min fan2 fan2 RW 0 fan3_min fan3 fan3 RW 0 temp NONE NONE R 1 temp_hyst temp temp RW 1 temp_over temp temp RW 1 vid NONE NONE R 2 fan1_div fan1 NONE RW 0 fan2_div fan2 NONE RW 0 fan3_div fan3 NONE R 0 alarms NONE NONE R 0 LABEL FEATURE SYMBOL SYSCTL FILE:OFFSET in0 SENSORS_LM78J_IN0 in0:3 in1 SENSORS_LM78J_IN1 in1:3 in2 SENSORS_LM78J_IN2 in2:3 in3 SENSORS_LM78J_IN3 in3:3 in4 SENSORS_LM78J_IN4 in4:3 in5 SENSORS_LM78J_IN5 in5:3 in6 SENSORS_LM78J_IN6 in6:3 in0_min SENSORS_LM78J_IN0_MIN in0:1 in1_min SENSORS_LM78J_IN1_MIN in1:1 in2_min SENSORS_LM78J_IN2_MIN in2:1 in3_min SENSORS_LM78J_IN3_MIN in3:1 in4_min SENSORS_LM78J_IN4_MIN in4:1 in5_min SENSORS_LM78J_IN5_MIN in5:1 in6_min SENSORS_LM78J_IN6_MIN in6:1 in0_max SENSORS_LM78J_IN0_MAX in0:2 in1_max SENSORS_LM78J_IN1_MAX in1:2 in2_max SENSORS_LM78J_IN2_MAX in2:2 in3_max SENSORS_LM78J_IN3_MAX in3:2 in4_max SENSORS_LM78J_IN4_MAX in4:2 in5_max SENSORS_LM78J_IN5_MAX in5:2 in6_max SENSORS_LM78J_IN6_MAX in6:2 fan1 SENSORS_LM78J_FAN1 fan1:2 fan2 SENSORS_LM78J_FAN2 fan2:2 fan3 SENSORS_LM78J_FAN3 fan3:2 fan1_min SENSORS_LM78J_FAN1_MIN fan1:1 fan2_min SENSORS_LM78J_FAN2_MIN fan2:1 fan3_min SENSORS_LM78J_FAN3_MIN fan3:1 temp SENSORS_LM78J_TEMP temp:3 temp_hyst SENSORS_LM78J_TEMP_HYST temp:2 temp_over SENSORS_LM78J_TEMP_OVER temp:1 vid SENSORS_LM78J_VID vid:1 fan1_div SENSORS_LM78J_FAN1_DIV fan_div:1 fan2_div SENSORS_LM78J_FAN2_DIV fan_div:2 fan3_div SENSORS_LM78J_FAN3_DIV fan_div:3 alarms SENSORS_LM78J_ALARMS alarms:1 Chip `lm79' LABEL LABEL CLASS COMPUTE CLASS ACCESS MAGNITUDE in0 NONE NONE R 2 in1 NONE NONE R 2 in2 NONE NONE R 2 in3 NONE NONE R 2 in4 NONE NONE R 2 in5 NONE NONE R 2 in6 NONE NONE R 2 in0_min in0 in0 RW 2 in1_min in1 in1 RW 2 in2_min in2 in2 RW 2 in3_min in3 in3 RW 2 in4_min in4 in4 RW 2 in5_min in5 in5 RW 2 in6_min in6 in6 RW 2 in0_max in0 in0 RW 2 in1_max in1 in1 RW 2 in2_max in2 in2 RW 2 in3_max in3 in3 RW 2 in4_max in4 in4 RW 2 in5_max in5 in5 RW 2 in6_max in6 in6 RW 2 fan1 NONE NONE R 0 fan2 NONE NONE R 0 fan3 NONE NONE R 0 fan1_min fan1 fan1 RW 0 fan2_min fan2 fan2 RW 0 fan3_min fan3 fan3 RW 0 temp NONE NONE R 1 temp_hyst temp temp RW 1 temp_over temp temp RW 1 vid NONE NONE R 2 fan1_div fan1 NONE RW 0 fan2_div fan2 NONE RW 0 fan3_div fan3 NONE R 0 alarms NONE NONE R 0 LABEL FEATURE SYMBOL SYSCTL FILE:OFFSET in0 SENSORS_LM79_IN0 in0:3 in1 SENSORS_LM79_IN1 in1:3 in2 SENSORS_LM79_IN2 in2:3 in3 SENSORS_LM79_IN3 in3:3 in4 SENSORS_LM79_IN4 in4:3 in5 SENSORS_LM79_IN5 in5:3 in6 SENSORS_LM79_IN6 in6:3 in0_min SENSORS_LM79_IN0_MIN in0:1 in1_min SENSORS_LM79_IN1_MIN in1:1 in2_min SENSORS_LM79_IN2_MIN in2:1 in3_min SENSORS_LM79_IN3_MIN in3:1 in4_min SENSORS_LM79_IN4_MIN in4:1 in5_min SENSORS_LM79_IN5_MIN in5:1 in6_min SENSORS_LM79_IN6_MIN in6:1 in0_max SENSORS_LM79_IN0_MAX in0:2 in1_max SENSORS_LM79_IN1_MAX in1:2 in2_max SENSORS_LM79_IN2_MAX in2:2 in3_max SENSORS_LM79_IN3_MAX in3:2 in4_max SENSORS_LM79_IN4_MAX in4:2 in5_max SENSORS_LM79_IN5_MAX in5:2 in6_max SENSORS_LM79_IN6_MAX in6:2 fan1 SENSORS_LM79_FAN1 fan1:2 fan2 SENSORS_LM79_FAN2 fan2:2 fan3 SENSORS_LM79_FAN3 fan3:2 fan1_min SENSORS_LM79_FAN1_MIN fan1:1 fan2_min SENSORS_LM79_FAN2_MIN fan2:1 fan3_min SENSORS_LM79_FAN3_MIN fan3:1 temp SENSORS_LM79_TEMP temp:3 temp_hyst SENSORS_LM79_TEMP_HYST temp:2 temp_over SENSORS_LM79_TEMP_OVER temp:1 vid SENSORS_LM79_VID vid:1 fan1_div SENSORS_LM79_FAN1_DIV fan_div:1 fan2_div SENSORS_LM79_FAN2_DIV fan_div:2 fan3_div SENSORS_LM79_FAN3_DIV fan_div:3 alarms SENSORS_LM79_ALARMS alarms:1