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lm-sensors/doc/chips/w83792d
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Jean Delvare 88d095b5ce Update from Linux 2.6. Most material is from Rudolf Marek. 
git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@3032 7894878c-1315-0410-8ee3-d5d059ff63e0
2005-07-15 11:14:36 +00:00

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Kernel driver `w83792d.o'
=========================
Status: W83792D support is complete and well-tested.
Supported chips:
* Winbond W83792D
Prefix: 'w83792d'
Addresses scanned: I2C 0x2c - 0x2f
Datasheet: http://www.winbond.com.tw/E-WINBONDHTM/partner/PDFresult.asp?Pname=1035
Author: Chunhao Huang
Contact: DZShen <DZShen@Winbond.com.tw>
Module Parameters
-----------------
* init int
(default 1)
Use 'init=0' to bypass initializing the chip.
Try this if your computer crashes when you load the module.
* force_subclients=bus,caddr,saddr,saddr
This is used to force the i2c addresses for subclients of
a certain chip. Example usage is `force_subclients=0,0x2f,0x4a,0x4b'
to force the subclients of chip 0x2f on bus 0 to i2c addresses
0x4a and 0x4b.
Description
-----------
This driver implements support for the Winbond W83792AD/D.
Detection of the chip can sometimes be foiled because it can be in an
internal state that allows no clean access (Bank with ID register is not
currently selected). If you know the address of the chip, use a 'force'
parameter; this will put it into a more well-behaved state first.
The driver implements three temperature sensors, seven fan rotation speed
sensors, nine voltage sensors, and two automatic fan regulation
strategies called: Smart Fan I (Thermal Cruise mode) and Smart Fan II.
Automatic fan control mode is possible only for fan1-fan3. Fan4-fan7 can run
synchronized with selected fan (fan1-fan3). This functionality and manual PWM
control for fan4-fan7 is not yet implemented.
Temperatures are measured in degrees Celsius and measurement resolution is 1
degC for temp1 and 0.5 degC for temp2 and temp3. An alarm is triggered when
the temperature gets higher than the Overtemperature Shutdown value; it stays
on until the temperature falls below the Hysteresis value.
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, 8, 16, 32, 64 or
128) to give the readings more range or accuracy. This driver modifies the
fan divisor automatically to get the reasonable RPM rotation range.
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.
Alarms are provided as output from "realtime status register". Following bits
are defined:
bit - alarm on:
0 - in0
1 - in1
2 - temp1
3 - temp2
4 - temp3
5 - fan1
6 - fan2
7 - fan3
8 - in2
9 - in3
10 - in4
11 - in5
12 - in6
13 - VID change
14 - chassis
15 - fan7
16 - tart1
17 - tart2
18 - tart3
19 - in7
20 - in8
21 - fan4
22 - fan5
23 - fan6
Tart will be asserted while target temperature cannot be achieved after 3 minutes
of full speed rotation of corresponding fan.
In addition to the alarms described above, there is a CHAS alarm on the chips
which triggers if your computer case is open (This one is latched, contrary
to realtime alarms).
The chips only update values each 3 seconds; reading them more often will
do no harm, but will return 'old' values.
W83792D PROBLEMS
----------------
Known problems:
- This driver is only for Winbond W83792D C version device, there
are also some motherboards with B version W83792D device. The
calculation method to in6-in7(measured value, limits) is a little
different between C and B version. C or B version can be identified
by CR[0x49h].
- The function of vid and vrm has not been finished, because I'm NOT
very familiar with them. Adding support is welcome.
- The function of chassis open detection needs more tests.
- If you have ASUS server board and chip was not found: Then you will
need to upgrade to latest (or beta) BIOS. If it does not help please
contact us.
Chip Features
-------------
Chip `w83792d'
LABEL LABEL CLASS COMPUTE CLASS ACCESS MAGNITUDE
in0 NONE NONE R 3
in1 NONE NONE R 3
in2 NONE NONE R 3
in3 NONE NONE R 3
in4 NONE NONE R 3
in5 NONE NONE R 3
in6 NONE NONE R 3
in7 NONE NONE R 3
in8 NONE NONE R 3
in0_min in0 in0 RW 3
in1_min in1 in1 RW 3
in2_min in2 in2 RW 3
in3_min in3 in3 RW 3
in4_min in4 in4 RW 3
in5_min in5 in5 RW 3
in6_min in6 in6 RW 3
in7_min in7 in7 RW 3
in8_min in8 in8 RW 3
in0_max in0 in0 RW 3
in1_max in1 in1 RW 3
in2_max in2 in2 RW 3
in3_max in3 in3 RW 3
in4_max in4 in4 RW 3
in5_max in5 in5 RW 3
in6_max in6 in6 RW 3
in7_max in7 in7 RW 3
in8_max in8 in8 RW 3
fan1 NONE NONE R 0
fan2 NONE NONE R 0
fan3 NONE NONE R 0
fan4 NONE NONE R 0
fan5 NONE NONE R 0
fan6 NONE NONE R 0
fan7 NONE NONE R 0
fan1_min fan1 NONE RW 0
fan2_min fan2 NONE RW 0
fan3_min fan3 NONE RW 0
fan4_min fan4 NONE RW 0
fan5_min fan5 NONE RW 0
fan6_min fan6 NONE RW 0
fan7_min fan7 NONE RW 0
temp1 NONE NONE R 1
temp1_hyst temp1 temp1 RW 1
temp1_over temp1 temp1 RW 1
temp2 NONE NONE R 1
temp2_hyst temp2 temp2 RW 1
temp2_over temp2 temp2 RW 1
temp3 NONE NONE R 1
temp3_hyst temp3 temp3 RW 1
temp3_over temp3 temp3 RW 1
fan1_div fan1 NONE RW 0
fan2_div fan2 NONE RW 0
fan3_div fan3 NONE RW 0
fan4_div fan4 NONE RW 0
fan5_div fan5 NONE RW 0
fan6_div fan6 NONE RW 0
fan7_div fan7 NONE RW 0
LABEL FEATURE SYMBOL SYSCTL FILE:NR
in0 SENSORS_W83792D_IN0 in0:3
in1 SENSORS_W83792D_IN1 in1:3
in2 SENSORS_W83792D_IN2 in2:3
in3 SENSORS_W83792D_IN3 in3:3
in4 SENSORS_W83792D_IN4 in4:3
in5 SENSORS_W83792D_IN5 in5:3
in6 SENSORS_W83792D_IN6 in6:3
in7 SENSORS_W83792D_IN7 in7:3
in8 SENSORS_W83792D_IN8 in8:3
in0_min SENSORS_W83792D_IN0_MIN in0:1
in1_min SENSORS_W83792D_IN1_MIN in1:1
in2_min SENSORS_W83792D_IN2_MIN in2:1
in3_min SENSORS_W83792D_IN3_MIN in3:1
in4_min SENSORS_W83792D_IN4_MIN in4:1
in5_min SENSORS_W83792D_IN5_MIN in5:1
in6_min SENSORS_W83792D_IN6_MIN in6:1
in7_min SENSORS_W83792D_IN7_MIN in7:1
in8_min SENSORS_W83792D_IN8_MIN in8:1
in0_max SENSORS_W83792D_IN0_MAX in0:2
in1_max SENSORS_W83792D_IN1_MAX in1:2
in2_max SENSORS_W83792D_IN2_MAX in2:2
in3_max SENSORS_W83792D_IN3_MAX in3:2
in4_max SENSORS_W83792D_IN4_MAX in4:2
in5_max SENSORS_W83792D_IN5_MAX in5:2
in6_max SENSORS_W83792D_IN6_MAX in6:2
in7_max SENSORS_W83792D_IN7_MAX in7:2
in8_max SENSORS_W83792D_IN8_MAX in8:2
fan1 SENSORS_W83792D_FAN1 fan1:2
fan2 SENSORS_W83792D_FAN2 fan2:2
fan3 SENSORS_W83792D_FAN3 fan3:2
fan4 SENSORS_W83792D_FAN4 fan4:2
fan5 SENSORS_W83792D_FAN5 fan5:2
fan6 SENSORS_W83792D_FAN6 fan6:2
fan7 SENSORS_W83792D_FAN7 fan7:2
fan1_min SENSORS_W83792D_FAN1_MIN fan1:1
fan2_min SENSORS_W83792D_FAN2_MIN fan2:1
fan3_min SENSORS_W83792D_FAN3_MIN fan3:1
fan4_min SENSORS_W83792D_FAN4_MIN fan4:1
fan5_min SENSORS_W83792D_FAN5_MIN fan5:1
fan6_min SENSORS_W83792D_FAN6_MIN fan6:1
fan7_min SENSORS_W83792D_FAN7_MIN fan7:1
temp1 SENSORS_W83792D_TEMP1 temp1:3
temp1_hyst SENSORS_W83792D_TEMP1_HYST temp1:2
temp1_over SENSORS_W83792D_TEMP1_OVER temp1:1
temp2 SENSORS_W83792D_TEMP2 temp2:3
temp2_hyst SENSORS_W83792D_TEMP2_HYST temp2:2
temp2_over SENSORS_W83792D_TEMP2_OVER temp2:1
temp3 SENSORS_W83792D_TEMP3 temp3:3
temp3_hyst SENSORS_W83792D_TEMP3_HYST temp3:2
temp3_over SENSORS_W83792D_TEMP3_OVER temp3:1
fan1_div SENSORS_W83792D_FAN1_DIV fan_div:1
fan2_div SENSORS_W83792D_FAN2_DIV fan_div:2
fan3_div SENSORS_W83792D_FAN3_DIV fan_div:3
fan4_div SENSORS_W83792D_FAN4_DIV fan_div:4
fan5_div SENSORS_W83792D_FAN5_DIV fan_div:5
fan6_div SENSORS_W83792D_FAN6_DIV fan_div:6
fan7_div SENSORS_W83792D_FAN7_DIV fan_div:7
/PROC ENTRIES
-------------
Most are identical to the w83781d entries. See the w83781d documentation for
details.
Most of the additional entries not in the w83781d are Winbond Smart Fan I/II:
Please read "7.7 FAN Speed Count and FAN Speed Control" of W83792AD/D datasheet
before you read the explanation to the /proc entries below.
fan_cfg: indicates the fan speed control mode: 0 means PWM/DC mode,
1 means Smart Fan I(Thermal Cruise) mode, 2 or 3 means Smart Fan II
mode. There are three items in this entry, the first one is the
configuration of Fan1, the rest may be deduced by analogy.
pwm_flag: valid under PWM/DC mode, 1 means PWM mode, 0 means DC mode.
There are three items in this entry, the first one is PWM/DC mode
of Fan1, the rest may be deduced by analogy.
thermal_cruise: valid under Smart Fan I mode, indicates the wanted
temperature. There are three items in this entry, the first one
is setting temperature of Fan1, the rest may be deduced by analogy.
fan_tolerance: valid under Smart Fan I or Smart Fan II mode, indicates
the interval temperature. There are also three items in this entry.
sf2_points_fan1: valid under Smart Fan II mode, there are four items in
this entry, indicates the Temp.[1-4] in "Figure 8. Smart Fan II
behavior" to Fan1.
sf2_points_fan2: almost same as the above one, except that this entry
is for Fan2.
sf2_points_fan3: almost same as the above one, except that this entry
is for Fan3.
sf2_levels_fan1: valid under Smart Fan II mode, there are four items in
this entry, indicates the "Non-Stop Duty Cycle" and "Fan Duty Cycle
Level [1-3]" in "Figure 8. Smart Fan II behavior" to Fan1. The
first item "Non-Stop Duty Cycle" is read only in this driver, while
the other three items can be modified.
sf2_levels_fan2: almost same as the above one, except that this entry
is for Fan2.
sf2_levels_fan3: almost same as the above one, except that this entry
is for Fan3.
additional entries for chassis intrusion detection:
chassis: There are two items in this entry, the first one indicats the
chassis status, 1 means chassis intrusion detected, while 1 means
normal. The second item in this entry is used to clear the
detected chassis intrusion interrupt and reset the chassis status
to normal.
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