106 lines
3.9 KiB
Plaintext
106 lines
3.9 KiB
Plaintext
Kernel driver f71805f
|
|
=====================
|
|
|
|
Supported chips:
|
|
* Fintek F71805F/FG
|
|
Prefix: 'f71805f'
|
|
Addresses scanned: none, address read from Super I/O config space
|
|
Datasheet: Provided by Fintek on request
|
|
|
|
Author: Jean Delvare <khali@linux-fr.org>
|
|
|
|
Thanks to Denis Kieft from Barracuda Networks for the donation of a
|
|
test system (custom Jetway K8M8MS motherboard, with CPU and RAM) and
|
|
for providing initial documentation.
|
|
|
|
Thanks to Kris Chen from Fintek for answering technical questions and
|
|
providing additional documentation.
|
|
|
|
Thanks to Chris Lin from Jetway for providing wiring schematics and
|
|
anwsering technical questions.
|
|
|
|
|
|
Description
|
|
-----------
|
|
|
|
The Fintek F71805F/FG Super I/O chip includes complete hardware monitoring
|
|
capabilities. It can monitor up to 9 voltages (counting its own power
|
|
source), 3 fans and 3 temperature sensors.
|
|
|
|
This chip also has fan controlling features, using either DC or PWM, in
|
|
three different modes (one manual, two automatic). The driver doesn't
|
|
support these features yet.
|
|
|
|
The driver assumes that no more than one chip is present, which seems
|
|
reasonable.
|
|
|
|
|
|
Voltage Monitoring
|
|
------------------
|
|
|
|
Voltages are sampled by an 8-bit ADC with a LSB of 8 mV. The supported
|
|
range is thus from 0 to 2.040 V. Voltage values outside of this range
|
|
need external resistors. An exception is in0, which is used to monitor
|
|
the chip's own power source (+3.3V), and is divided internally by a
|
|
factor 2.
|
|
|
|
The two LSB of the voltage limit registers are not used (always 0), so
|
|
you can only set the limits in steps of 32 mV (before scaling).
|
|
|
|
The wirings and resistor values suggested by Fintek are as follow:
|
|
|
|
pin expected
|
|
name use R1 R2 divider raw val.
|
|
|
|
in0 VCC VCC3.3V int. int. 2.00 1.65 V
|
|
in1 VIN1 VTT1.2V 10K - 1.00 1.20 V
|
|
in2 VIN2 VRAM 100K 100K 2.00 ~1.25 V (1)
|
|
in3 VIN3 VCHIPSET 47K 100K 1.47 2.24 V (2)
|
|
in4 VIN4 VCC5V 200K 47K 5.25 0.95 V
|
|
in5 VIN5 +12V 200K 20K 11.00 1.05 V
|
|
in6 VIN6 VCC1.5V 10K - 1.00 1.50 V
|
|
in7 VIN7 VCORE 10K - 1.00 ~1.40 V (1)
|
|
in8 VIN8 VSB5V 200K 47K 1.00 0.95 V
|
|
|
|
(1) Depends on your hardware setup.
|
|
(2) Obviously not correct, swapping R1 and R2 would make more sense.
|
|
|
|
These values can be used as hints at best, as motherboard manufacturers
|
|
are free to use a completely different setup. As a matter of fact, the
|
|
Jetway K8M8MS uses a significantly different setup. You will have to
|
|
find out documentation about your own motherboard, and edit sensors.conf
|
|
accordingly.
|
|
|
|
Each voltage measured has associated low and high limits, each of which
|
|
triggers an alarm when crossed.
|
|
|
|
|
|
Fan Monitoring
|
|
--------------
|
|
|
|
Fan rotation speeds are reported as 12-bit values from a gated clock
|
|
signal. Speeds down to 366 RPM can be measured. There is no theoretical
|
|
high limit, but values over 6000 RPM seem to cause problem. The effective
|
|
resolution is much lower than you would expect, the step between different
|
|
register values being 10 rather than 1.
|
|
|
|
The chip assumes 2 pulse-per-revolution fans.
|
|
|
|
An alarm is triggered if the rotation speed drops below a programmable
|
|
limit or is too low to be measured.
|
|
|
|
|
|
Temperature Monitoring
|
|
----------------------
|
|
|
|
Temperatures are reported in degrees Celsius. Each temperature measured
|
|
has a high limit, those crossing triggers an alarm. There is an associated
|
|
hysteresis value, below which the temperature has to drop before the
|
|
alarm is cleared.
|
|
|
|
All temperature channels are external, there is no embedded temperature
|
|
sensor. Each channel can be used for connecting either a thermal diode
|
|
or a thermistor. The driver reports the currently selected mode, but
|
|
doesn't allow changing it. In theory, the BIOS should have configured
|
|
everything properly.
|