mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 09:19:51 +00:00
![Alexander A. Klimov](/assets/img/avatar_default.png)
Rationale: Reduces attack surface on kernel devs opening the links for MITM as HTTPS traffic is much harder to manipulate. Deterministic algorithm: For each file: If not .svg: For each line: If doesn't contain `\bxmlns\b`: For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`: If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`: If both the HTTP and HTTPS versions return 200 OK and serve the same content: Replace HTTP with HTTPS. Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de> Link: https://lore.kernel.org/r/20200719175512.60745-1-grandmaster@al2klimov.de Signed-off-by: Guenter Roeck <linux@roeck-us.net>
513 lines
17 KiB
ReStructuredText
513 lines
17 KiB
ReStructuredText
Kernel driver w83781d
|
|
=====================
|
|
|
|
Supported chips:
|
|
|
|
* Winbond W83781D
|
|
|
|
Prefix: 'w83781d'
|
|
|
|
Addresses scanned: I2C 0x28 - 0x2f, ISA 0x290 (8 I/O ports)
|
|
|
|
Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/w83781d.pdf
|
|
|
|
* Winbond W83782D
|
|
|
|
Prefix: 'w83782d'
|
|
|
|
Addresses scanned: I2C 0x28 - 0x2f, ISA 0x290 (8 I/O ports)
|
|
|
|
Datasheet: https://www.winbond.com
|
|
|
|
* Winbond W83783S
|
|
|
|
Prefix: 'w83783s'
|
|
|
|
Addresses scanned: I2C 0x2d
|
|
|
|
Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/w83783s.pdf
|
|
|
|
* Asus AS99127F
|
|
|
|
Prefix: 'as99127f'
|
|
|
|
Addresses scanned: I2C 0x28 - 0x2f
|
|
|
|
Datasheet: Unavailable from Asus
|
|
|
|
|
|
|
|
Authors:
|
|
|
|
- Frodo Looijaard <frodol@dds.nl>,
|
|
- Philip Edelbrock <phil@netroedge.com>,
|
|
- Mark Studebaker <mdsxyz123@yahoo.com>
|
|
|
|
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.
|
|
|
|
* reset int
|
|
(default 0)
|
|
The driver used to reset the chip on load, but does no more. Use
|
|
'reset=1' to restore the old behavior. Report if you need to do this.
|
|
|
|
force_subclients=bus,caddr,saddr,saddr
|
|
This is used to force the i2c addresses for subclients of
|
|
a certain chip. Typical usage is `force_subclients=0,0x2d,0x4a,0x4b`
|
|
to force the subclients of chip 0x2d on bus 0 to i2c addresses
|
|
0x4a and 0x4b. This parameter is useful for certain Tyan boards.
|
|
|
|
Description
|
|
-----------
|
|
|
|
This driver implements support for the Winbond W83781D, W83782D, W83783S
|
|
chips, and the Asus AS99127F chips. We will refer to them collectively as
|
|
W8378* chips.
|
|
|
|
There is quite some difference between these chips, but they are similar
|
|
enough that it was sensible to put them together in one driver.
|
|
The Asus chips are similar to an I2C-only W83782D.
|
|
|
|
+----------+---------+--------+-------+-------+---------+--------+------+-----+
|
|
| Chip | #vin | #fanin | #pwm | #temp | wchipid | vendid | i2c | ISA |
|
|
+----------+---------+--------+-------+-------+---------+--------+------+-----+
|
|
| as99127f | 7 | 3 | 0 | 3 | 0x31 | 0x12c3 | yes | no |
|
|
+----------+---------+--------+-------+-------+---------+--------+------+-----+
|
|
| as99127f rev.2 (type_name = as99127f) | 0x31 | 0x5ca3 | yes | no |
|
|
+----------+---------+--------+-------+-------+---------+--------+------+-----+
|
|
| w83781d | 7 | 3 | 0 | 3 | 0x10-1 | 0x5ca3 | yes | yes |
|
|
+----------+---------+--------+-------+-------+---------+--------+------+-----+
|
|
| w83782d | 9 | 3 | 2-4 | 3 | 0x30 | 0x5ca3 | yes | yes |
|
|
+----------+---------+--------+-------+-------+---------+--------+------+-----+
|
|
| w83783s | 5-6 | 3 | 2 | 1-2 | 0x40 | 0x5ca3 | yes | no |
|
|
+----------+---------+--------+-------+-------+---------+--------+------+-----+
|
|
|
|
Detection of these chips can sometimes be foiled because they can be in
|
|
an internal state that allows no clean access. If you know the address
|
|
of the chip, use a 'force' parameter; this will put them into a more
|
|
well-behaved state first.
|
|
|
|
The W8378* implements temperature sensors (three on the W83781D and W83782D,
|
|
two on the W83783S), three fan rotation speed sensors, voltage sensors
|
|
(seven on the W83781D, nine on the W83782D and six on the W83783S), VID
|
|
lines, alarms with beep warnings, and some miscellaneous stuff.
|
|
|
|
Temperatures are measured in degrees Celsius. There is always one main
|
|
temperature sensor, and one (W83783S) or two (W83781D and W83782D) other
|
|
sensors. An alarm is triggered for the main sensor once when the
|
|
Overtemperature Shutdown limit is crossed; it is triggered again as soon as
|
|
it drops below the Hysteresis value. A more useful behavior
|
|
can be found by setting the Hysteresis value to +127 degrees Celsius; in
|
|
this case, alarms are issued during all the time when the actual temperature
|
|
is above the Overtemperature Shutdown value. The driver sets the
|
|
hysteresis value for temp1 to 127 at initialization.
|
|
|
|
For the other temperature sensor(s), an alarm is triggered when the
|
|
temperature gets higher then the Overtemperature Shutdown value; it stays
|
|
on until the temperature falls below the Hysteresis value. But on the
|
|
W83781D, there is only one alarm that functions for both other sensors!
|
|
Temperatures are guaranteed within a range of -55 to +125 degrees. The
|
|
main temperature sensors has a resolution of 1 degree; the other sensor(s)
|
|
of 0.5 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 for the
|
|
W83781D; 1, 2, 4, 8, 16, 32, 64 or 128 for the others) 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.
|
|
|
|
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.
|
|
|
|
The W83782D and W83783S temperature conversion machine understands about
|
|
several kinds of temperature probes. You can program the so-called
|
|
beta value in the sensor files. '1' is the PII/Celeron diode, '2' is the
|
|
TN3904 transistor, and 3435 the default thermistor value. Other values
|
|
are (not yet) supported.
|
|
|
|
In addition to the alarms described above, there is a CHAS alarm on the
|
|
chips which triggers if your computer case is open.
|
|
|
|
When an alarm goes off, you can be warned by a beeping signal through
|
|
your computer speaker. It is possible to enable all beeping globally,
|
|
or only the beeping for some alarms.
|
|
|
|
Individual alarm and beep bits:
|
|
|
|
======== ==========================
|
|
0x000001 in0
|
|
0x000002 in1
|
|
0x000004 in2
|
|
0x000008 in3
|
|
0x000010 temp1
|
|
0x000020 temp2 (+temp3 on W83781D)
|
|
0x000040 fan1
|
|
0x000080 fan2
|
|
0x000100 in4
|
|
0x000200 in5
|
|
0x000400 in6
|
|
0x000800 fan3
|
|
0x001000 chassis
|
|
0x002000 temp3 (W83782D only)
|
|
0x010000 in7 (W83782D only)
|
|
0x020000 in8 (W83782D only)
|
|
======== ==========================
|
|
|
|
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 chips only update values each 1.5 seconds; reading them more often
|
|
will do no harm, but will return 'old' values.
|
|
|
|
AS99127F PROBLEMS
|
|
-----------------
|
|
The as99127f support was developed without the benefit of a datasheet.
|
|
In most cases it is treated as a w83781d (although revision 2 of the
|
|
AS99127F looks more like a w83782d).
|
|
This support will be BETA until a datasheet is released.
|
|
One user has reported problems with fans stopping
|
|
occasionally.
|
|
|
|
Note that the individual beep bits are inverted from the other chips.
|
|
The driver now takes care of this so that user-space applications
|
|
don't have to know about it.
|
|
|
|
Known problems:
|
|
- Problems with diode/thermistor settings (supported?)
|
|
- One user reports fans stopping under high server load.
|
|
- Revision 2 seems to have 2 PWM registers but we don't know
|
|
how to handle them. More details below.
|
|
|
|
These will not be fixed unless we get a datasheet.
|
|
If you have problems, please lobby Asus to release a datasheet.
|
|
Unfortunately several others have without success.
|
|
Please do not send mail to us asking for better as99127f support.
|
|
We have done the best we can without a datasheet.
|
|
Please do not send mail to the author or the sensors group asking for
|
|
a datasheet or ideas on how to convince Asus. We can't help.
|
|
|
|
|
|
NOTES
|
|
-----
|
|
783s has no in1 so that in[2-6] are compatible with the 781d/782d.
|
|
|
|
783s pin is programmable for -5V or temp1; defaults to -5V,
|
|
no control in driver so temp1 doesn't work.
|
|
|
|
782d and 783s datasheets differ on which is pwm1 and which is pwm2.
|
|
We chose to follow 782d.
|
|
|
|
782d and 783s pin is programmable for fan3 input or pwm2 output;
|
|
defaults to fan3 input.
|
|
If pwm2 is enabled (with echo 255 1 > pwm2), then
|
|
fan3 will report 0.
|
|
|
|
782d has pwm1-2 for ISA, pwm1-4 for i2c. (pwm3-4 share pins with
|
|
the ISA pins)
|
|
|
|
Data sheet updates
|
|
------------------
|
|
- PWM clock registers:
|
|
* 000: master / 512
|
|
* 001: master / 1024
|
|
* 010: master / 2048
|
|
* 011: master / 4096
|
|
* 100: master / 8192
|
|
|
|
|
|
Answers from Winbond tech support
|
|
---------------------------------
|
|
|
|
::
|
|
|
|
>
|
|
> 1) In the W83781D data sheet section 7.2 last paragraph, it talks about
|
|
> reprogramming the R-T table if the Beta of the thermistor is not
|
|
> 3435K. The R-T table is described briefly in section 8.20.
|
|
> What formulas do I use to program a new R-T table for a given Beta?
|
|
>
|
|
|
|
We are sorry that the calculation for R-T table value is
|
|
confidential. If you have another Beta value of thermistor, we can help
|
|
to calculate the R-T table for you. But you should give us real R-T
|
|
Table which can be gotten by thermistor vendor. Therefore we will calculate
|
|
them and obtain 32-byte data, and you can fill the 32-byte data to the
|
|
register in Bank0.CR51 of W83781D.
|
|
|
|
|
|
> 2) In the W83782D data sheet, it mentions that pins 38, 39, and 40 are
|
|
> programmable to be either thermistor or Pentium II diode inputs.
|
|
> How do I program them for diode inputs? I can't find any register
|
|
> to program these to be diode inputs.
|
|
|
|
You may program Bank0 CR[5Dh] and CR[59h] registers.
|
|
|
|
=============================== =============== ============== ============
|
|
CR[5Dh] bit 1(VTIN1) bit 2(VTIN2) bit 3(VTIN3)
|
|
|
|
thermistor 0 0 0
|
|
diode 1 1 1
|
|
|
|
|
|
(error) CR[59h] bit 4(VTIN1) bit 2(VTIN2) bit 3(VTIN3)
|
|
(right) CR[59h] bit 4(VTIN1) bit 5(VTIN2) bit 6(VTIN3)
|
|
|
|
PII thermal diode 1 1 1
|
|
2N3904 diode 0 0 0
|
|
=============================== =============== ============== ============
|
|
|
|
|
|
Asus Clones
|
|
-----------
|
|
|
|
We have no datasheets for the Asus clones (AS99127F and ASB100 Bach).
|
|
Here are some very useful information that were given to us by Alex Van
|
|
Kaam about how to detect these chips, and how to read their values. He
|
|
also gives advice for another Asus chipset, the Mozart-2 (which we
|
|
don't support yet). Thanks Alex!
|
|
|
|
I reworded some parts and added personal comments.
|
|
|
|
Detection
|
|
^^^^^^^^^
|
|
|
|
AS99127F rev.1, AS99127F rev.2 and ASB100:
|
|
- I2C address range: 0x29 - 0x2F
|
|
- If register 0x58 holds 0x31 then we have an Asus (either ASB100 or AS99127F)
|
|
- Which one depends on register 0x4F (manufacturer ID):
|
|
|
|
- 0x06 or 0x94: ASB100
|
|
- 0x12 or 0xC3: AS99127F rev.1
|
|
- 0x5C or 0xA3: AS99127F rev.2
|
|
|
|
Note that 0x5CA3 is Winbond's ID (WEC), which let us think Asus get their
|
|
AS99127F rev.2 direct from Winbond. The other codes mean ATT and DVC,
|
|
respectively. ATT could stand for Asustek something (although it would be
|
|
very badly chosen IMHO), I don't know what DVC could stand for. Maybe
|
|
these codes simply aren't meant to be decoded that way.
|
|
|
|
Mozart-2:
|
|
- I2C address: 0x77
|
|
- If register 0x58 holds 0x56 or 0x10 then we have a Mozart-2
|
|
- Of the Mozart there are 3 types:
|
|
|
|
- 0x58=0x56, 0x4E=0x94, 0x4F=0x36: Asus ASM58 Mozart-2
|
|
- 0x58=0x56, 0x4E=0x94, 0x4F=0x06: Asus AS2K129R Mozart-2
|
|
- 0x58=0x10, 0x4E=0x5C, 0x4F=0xA3: Asus ??? Mozart-2
|
|
|
|
You can handle all 3 the exact same way :)
|
|
|
|
Temperature sensors
|
|
^^^^^^^^^^^^^^^^^^^
|
|
|
|
ASB100:
|
|
- sensor 1: register 0x27
|
|
- sensor 2 & 3 are the 2 LM75's on the SMBus
|
|
- sensor 4: register 0x17
|
|
|
|
Remark:
|
|
|
|
I noticed that on Intel boards sensor 2 is used for the CPU
|
|
and 4 is ignored/stuck, on AMD boards sensor 4 is the CPU and sensor 2 is
|
|
either ignored or a socket temperature.
|
|
|
|
AS99127F (rev.1 and 2 alike):
|
|
- sensor 1: register 0x27
|
|
- sensor 2 & 3 are the 2 LM75's on the SMBus
|
|
|
|
Remark:
|
|
|
|
Register 0x5b is suspected to be temperature type selector. Bit 1
|
|
would control temp1, bit 3 temp2 and bit 5 temp3.
|
|
|
|
Mozart-2:
|
|
- sensor 1: register 0x27
|
|
- sensor 2: register 0x13
|
|
|
|
Fan sensors
|
|
^^^^^^^^^^^
|
|
|
|
ASB100, AS99127F (rev.1 and 2 alike):
|
|
- 3 fans, identical to the W83781D
|
|
|
|
Mozart-2:
|
|
- 2 fans only, 1350000/RPM/div
|
|
- fan 1: register 0x28, divisor on register 0xA1 (bits 4-5)
|
|
- fan 2: register 0x29, divisor on register 0xA1 (bits 6-7)
|
|
|
|
Voltages
|
|
^^^^^^^^
|
|
|
|
This is where there is a difference between AS99127F rev.1 and 2.
|
|
|
|
Remark:
|
|
|
|
The difference is similar to the difference between
|
|
W83781D and W83782D.
|
|
|
|
ASB100:
|
|
- in0=r(0x20)*0.016
|
|
- in1=r(0x21)*0.016
|
|
- in2=r(0x22)*0.016
|
|
- in3=r(0x23)*0.016*1.68
|
|
- in4=r(0x24)*0.016*3.8
|
|
- in5=r(0x25)*(-0.016)*3.97
|
|
- in6=r(0x26)*(-0.016)*1.666
|
|
|
|
AS99127F rev.1:
|
|
- in0=r(0x20)*0.016
|
|
- in1=r(0x21)*0.016
|
|
- in2=r(0x22)*0.016
|
|
- in3=r(0x23)*0.016*1.68
|
|
- in4=r(0x24)*0.016*3.8
|
|
- in5=r(0x25)*(-0.016)*3.97
|
|
- in6=r(0x26)*(-0.016)*1.503
|
|
|
|
AS99127F rev.2:
|
|
- in0=r(0x20)*0.016
|
|
- in1=r(0x21)*0.016
|
|
- in2=r(0x22)*0.016
|
|
- in3=r(0x23)*0.016*1.68
|
|
- in4=r(0x24)*0.016*3.8
|
|
- in5=(r(0x25)*0.016-3.6)*5.14+3.6
|
|
- in6=(r(0x26)*0.016-3.6)*3.14+3.6
|
|
|
|
Mozart-2:
|
|
- in0=r(0x20)*0.016
|
|
- in1=255
|
|
- in2=r(0x22)*0.016
|
|
- in3=r(0x23)*0.016*1.68
|
|
- in4=r(0x24)*0.016*4
|
|
- in5=255
|
|
- in6=255
|
|
|
|
|
|
PWM
|
|
^^^
|
|
|
|
* Additional info about PWM on the AS99127F (may apply to other Asus
|
|
chips as well) by Jean Delvare as of 2004-04-09:
|
|
|
|
AS99127F revision 2 seems to have two PWM registers at 0x59 and 0x5A,
|
|
and a temperature sensor type selector at 0x5B (which basically means
|
|
that they swapped registers 0x59 and 0x5B when you compare with Winbond
|
|
chips).
|
|
Revision 1 of the chip also has the temperature sensor type selector at
|
|
0x5B, but PWM registers have no effect.
|
|
|
|
We don't know exactly how the temperature sensor type selection works.
|
|
Looks like bits 1-0 are for temp1, bits 3-2 for temp2 and bits 5-4 for
|
|
temp3, although it is possible that only the most significant bit matters
|
|
each time. So far, values other than 0 always broke the readings.
|
|
|
|
PWM registers seem to be split in two parts: bit 7 is a mode selector,
|
|
while the other bits seem to define a value or threshold.
|
|
|
|
When bit 7 is clear, bits 6-0 seem to hold a threshold value. If the value
|
|
is below a given limit, the fan runs at low speed. If the value is above
|
|
the limit, the fan runs at full speed. We have no clue as to what the limit
|
|
represents. Note that there seem to be some inertia in this mode, speed
|
|
changes may need some time to trigger. Also, an hysteresis mechanism is
|
|
suspected since walking through all the values increasingly and then
|
|
decreasingly led to slightly different limits.
|
|
|
|
When bit 7 is set, bits 3-0 seem to hold a threshold value, while bits 6-4
|
|
would not be significant. If the value is below a given limit, the fan runs
|
|
at full speed, while if it is above the limit it runs at low speed (so this
|
|
is the contrary of the other mode, in a way). Here again, we don't know
|
|
what the limit is supposed to represent.
|
|
|
|
One remarkable thing is that the fans would only have two or three
|
|
different speeds (transitional states left apart), not a whole range as
|
|
you usually get with PWM.
|
|
|
|
As a conclusion, you can write 0x00 or 0x8F to the PWM registers to make
|
|
fans run at low speed, and 0x7F or 0x80 to make them run at full speed.
|
|
|
|
Please contact us if you can figure out how it is supposed to work. As
|
|
long as we don't know more, the w83781d driver doesn't handle PWM on
|
|
AS99127F chips at all.
|
|
|
|
* Additional info about PWM on the AS99127F rev.1 by Hector Martin:
|
|
|
|
I've been fiddling around with the (in)famous 0x59 register and
|
|
found out the following values do work as a form of coarse pwm:
|
|
|
|
0x80
|
|
- seems to turn fans off after some time(1-2 minutes)... might be
|
|
some form of auto-fan-control based on temp? hmm (Qfan? this mobo is an
|
|
old ASUS, it isn't marketed as Qfan. Maybe some beta pre-attempt at Qfan
|
|
that was dropped at the BIOS)
|
|
0x81
|
|
- off
|
|
0x82
|
|
- slightly "on-ner" than off, but my fans do not get to move. I can
|
|
hear the high-pitched PWM sound that motors give off at too-low-pwm.
|
|
0x83
|
|
- now they do move. Estimate about 70% speed or so.
|
|
0x84-0x8f
|
|
- full on
|
|
|
|
Changing the high nibble doesn't seem to do much except the high bit
|
|
(0x80) must be set for PWM to work, else the current pwm doesn't seem to
|
|
change.
|
|
|
|
My mobo is an ASUS A7V266-E. This behavior is similar to what I got
|
|
with speedfan under Windows, where 0-15% would be off, 15-2x% (can't
|
|
remember the exact value) would be 70% and higher would be full on.
|
|
|
|
* Additional info about PWM on the AS99127F rev.1 from lm-sensors
|
|
ticket #2350:
|
|
|
|
I conducted some experiment on Asus P3B-F motherboard with AS99127F
|
|
(Ver. 1).
|
|
|
|
I confirm that 0x59 register control the CPU_Fan Header on this
|
|
motherboard, and 0x5a register control PWR_Fan.
|
|
|
|
In order to reduce the dependency of specific fan, the measurement is
|
|
conducted with a digital scope without fan connected. I found out that
|
|
P3B-F actually output variable DC voltage on fan header center pin,
|
|
looks like PWM is filtered on this motherboard.
|
|
|
|
Here are some of measurements:
|
|
|
|
==== =========
|
|
0x80 20 mV
|
|
0x81 20 mV
|
|
0x82 232 mV
|
|
0x83 1.2 V
|
|
0x84 2.31 V
|
|
0x85 3.44 V
|
|
0x86 4.62 V
|
|
0x87 5.81 V
|
|
0x88 7.01 V
|
|
9x89 8.22 V
|
|
0x8a 9.42 V
|
|
0x8b 10.6 V
|
|
0x8c 11.9 V
|
|
0x8d 12.4 V
|
|
0x8e 12.4 V
|
|
0x8f 12.4 V
|
|
==== =========
|