107 lines
4.3 KiB
Plaintext
107 lines
4.3 KiB
Plaintext
|
Kernel driver sis5595
|
||
|
|
=====================
|
||
|
|
|
||
|
|
Supported chips:
|
||
|
|
* Silicon Integrated Systems Corp. SiS5595 Southbridge Hardware Monitor
|
||
|
|
Prefix: 'sis5595'
|
||
|
|
Addresses scanned: ISA in PCI-space encoded address
|
||
|
|
Datasheet: Publicly available at the Silicon Integrated Systems Corp. site.
|
||
|
|
|
||
|
|
Authors:
|
||
|
|
Kyösti Mälkki <kmalkki@cc.hut.fi>,
|
||
|
|
Mark D. Studebaker <mdsxyz123@yahoo.com>,
|
||
|
|
Aurelien Jarno <aurelien@aurel32.net> 2.6 port
|
||
|
|
|
||
|
|
SiS southbridge has a LM78-like chip integrated on the same IC.
|
||
|
|
This driver is a customized copy of lm78.c
|
||
|
|
|
||
|
|
Supports following revisions:
|
||
|
|
Version PCI ID PCI Revision
|
||
|
|
1 1039/0008 AF or less
|
||
|
|
2 1039/0008 B0 or greater
|
||
|
|
|
||
|
|
Note: these chips contain a 0008 device which is incompatible with the
|
||
|
|
5595. We recognize these by the presence of the listed
|
||
|
|
"blacklist" PCI ID and refuse to load.
|
||
|
|
|
||
|
|
NOT SUPPORTED PCI ID BLACKLIST PCI ID
|
||
|
|
540 0008 0540
|
||
|
|
550 0008 0550
|
||
|
|
5513 0008 5511
|
||
|
|
5581 0008 5597
|
||
|
|
5582 0008 5597
|
||
|
|
5597 0008 5597
|
||
|
|
630 0008 0630
|
||
|
|
645 0008 0645
|
||
|
|
730 0008 0730
|
||
|
|
735 0008 0735
|
||
|
|
|
||
|
|
|
||
|
|
Module Parameters
|
||
|
|
-----------------
|
||
|
|
force_addr=0xaddr Set the I/O base address. Useful for boards
|
||
|
|
that don't set the address in the BIOS. Does not do a
|
||
|
|
PCI force; the device must still be present in lspci.
|
||
|
|
Don't use this unless the driver complains that the
|
||
|
|
base address is not set.
|
||
|
|
Example: 'modprobe sis5595 force_addr=0x290'
|
||
|
|
|
||
|
|
|
||
|
|
Description
|
||
|
|
-----------
|
||
|
|
|
||
|
|
The SiS5595 southbridge has integrated hardware monitor functions. It also
|
||
|
|
has an I2C bus, but this driver only supports the hardware monitor. For the
|
||
|
|
I2C bus driver see i2c-sis5595.
|
||
|
|
|
||
|
|
The SiS5595 implements zero or one temperature sensor, two fan speed
|
||
|
|
sensors, four or five voltage sensors, and alarms.
|
||
|
|
|
||
|
|
On the first version of the chip, there are four voltage sensors and one
|
||
|
|
temperature sensor.
|
||
|
|
|
||
|
|
On the second version of the chip, the temperature sensor (temp) and the
|
||
|
|
fifth voltage sensor (in4) share a pin which is configurable, but not
|
||
|
|
through the driver. Sorry. The driver senses the configuration of the pin,
|
||
|
|
which was hopefully set by the BIOS.
|
||
|
|
|
||
|
|
Temperatures are measured in degrees Celsius. An alarm is triggered once
|
||
|
|
when the max is crossed; it is also triggered when it drops below the min
|
||
|
|
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. 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.
|
||
|
|
|
||
|
|
In addition to the alarms described above, there is a BTI alarm, which gets
|
||
|
|
triggered when an external chip has crossed its limits. Usually, this is
|
||
|
|
connected to some LM75-like chip; if at least one crosses its limits, this
|
||
|
|
bit gets set.
|
||
|
|
|
||
|
|
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 SiS5595 only updates its values each 1.5 seconds; reading it more often
|
||
|
|
will do no harm, but will return 'old' values.
|
||
|
|
|
||
|
|
Problems
|
||
|
|
--------
|
||
|
|
Some chips refuse to be enabled. We don't know why.
|
||
|
|
The driver will recognize this and print a message in dmesg.
|
||
|
|
|