453 lines
16 KiB
Text
453 lines
16 KiB
Text
Kernel driver w83781d
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=====================
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Supported chips:
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* Winbond W83781D
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Prefix: 'w83781d'
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Addresses scanned: I2C 0x28 - 0x2f, ISA 0x290 (8 I/O ports)
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Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/w83781d.pdf
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* Winbond W83782D
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Prefix: 'w83782d'
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Addresses scanned: I2C 0x28 - 0x2f, ISA 0x290 (8 I/O ports)
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Datasheet: http://www.winbond.com
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* Winbond W83783S
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Prefix: 'w83783s'
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Addresses scanned: I2C 0x2d
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Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/w83783s.pdf
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* Asus AS99127F
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Prefix: 'as99127f'
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Addresses scanned: I2C 0x28 - 0x2f
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Datasheet: Unavailable from Asus
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Authors:
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Frodo Looijaard <frodol@dds.nl>,
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Philip Edelbrock <phil@netroedge.com>,
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Mark Studebaker <mdsxyz123@yahoo.com>
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Module parameters
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-----------------
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* init int
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(default 1)
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Use 'init=0' to bypass initializing the chip.
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Try this if your computer crashes when you load the module.
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* reset int
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(default 0)
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The driver used to reset the chip on load, but does no more. Use
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'reset=1' to restore the old behavior. Report if you need to do this.
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force_subclients=bus,caddr,saddr,saddr
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This is used to force the i2c addresses for subclients of
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a certain chip. Typical usage is `force_subclients=0,0x2d,0x4a,0x4b'
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to force the subclients of chip 0x2d on bus 0 to i2c addresses
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0x4a and 0x4b. This parameter is useful for certain Tyan boards.
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Description
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-----------
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This driver implements support for the Winbond W83781D, W83782D, W83783S
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chips, and the Asus AS99127F chips. We will refer to them collectively as
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W8378* chips.
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There is quite some difference between these chips, but they are similar
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enough that it was sensible to put them together in one driver.
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The Asus chips are similar to an I2C-only W83782D.
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Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
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as99127f 7 3 0 3 0x31 0x12c3 yes no
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as99127f rev.2 (type_name = as99127f) 0x31 0x5ca3 yes no
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w83781d 7 3 0 3 0x10-1 0x5ca3 yes yes
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w83782d 9 3 2-4 3 0x30 0x5ca3 yes yes
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w83783s 5-6 3 2 1-2 0x40 0x5ca3 yes no
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Detection of these chips can sometimes be foiled because they can be in
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an internal state that allows no clean access. If you know the address
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of the chip, use a 'force' parameter; this will put them into a more
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well-behaved state first.
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The W8378* implements temperature sensors (three on the W83781D and W83782D,
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two on the W83783S), three fan rotation speed sensors, voltage sensors
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(seven on the W83781D, nine on the W83782D and six on the W83783S), VID
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lines, alarms with beep warnings, and some miscellaneous stuff.
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Temperatures are measured in degrees Celsius. There is always one main
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temperature sensor, and one (W83783S) or two (W83781D and W83782D) other
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sensors. An alarm is triggered for the main sensor once when the
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Overtemperature Shutdown limit is crossed; it is triggered again as soon as
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it drops below the Hysteresis value. A more useful behavior
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can be found by setting the Hysteresis value to +127 degrees Celsius; in
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this case, alarms are issued during all the time when the actual temperature
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is above the Overtemperature Shutdown value. The driver sets the
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hysteresis value for temp1 to 127 at initialization.
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For the other temperature sensor(s), an alarm is triggered when the
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temperature gets higher then the Overtemperature Shutdown value; it stays
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on until the temperature falls below the Hysteresis value. But on the
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W83781D, there is only one alarm that functions for both other sensors!
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Temperatures are guaranteed within a range of -55 to +125 degrees. The
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main temperature sensors has a resolution of 1 degree; the other sensor(s)
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of 0.5 degree.
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Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
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triggered if the rotation speed has dropped below a programmable limit. Fan
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readings can be divided by a programmable divider (1, 2, 4 or 8 for the
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W83781D; 1, 2, 4, 8, 16, 32, 64 or 128 for the others) to give
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the readings more range or accuracy. Not all RPM values can accurately
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be represented, so some rounding is done. With a divider of 2, the lowest
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representable value is around 2600 RPM.
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Voltage sensors (also known as IN sensors) report their values in volts.
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An alarm is triggered if the voltage has crossed a programmable minimum
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or maximum limit. Note that minimum in this case always means 'closest to
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zero'; this is important for negative voltage measurements. All voltage
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inputs can measure voltages between 0 and 4.08 volts, with a resolution
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of 0.016 volt.
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The VID lines encode the core voltage value: the voltage level your processor
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should work with. This is hardcoded by the mainboard and/or processor itself.
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It is a value in volts. When it is unconnected, you will often find the
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value 3.50 V here.
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The W83782D and W83783S temperature conversion machine understands about
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several kinds of temperature probes. You can program the so-called
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beta value in the sensor files. '1' is the PII/Celeron diode, '2' is the
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TN3904 transistor, and 3435 the default thermistor value. Other values
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are (not yet) supported.
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In addition to the alarms described above, there is a CHAS alarm on the
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chips which triggers if your computer case is open.
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When an alarm goes off, you can be warned by a beeping signal through
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your computer speaker. It is possible to enable all beeping globally,
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or only the beeping for some alarms.
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Individual alarm and beep bits:
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0x000001: in0
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0x000002: in1
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0x000004: in2
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0x000008: in3
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0x000010: temp1
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0x000020: temp2 (+temp3 on W83781D)
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0x000040: fan1
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0x000080: fan2
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0x000100: in4
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0x000200: in5
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0x000400: in6
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0x000800: fan3
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0x001000: chassis
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0x002000: temp3 (W83782D only)
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0x010000: in7 (W83782D only)
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0x020000: in8 (W83782D only)
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If an alarm triggers, it will remain triggered until the hardware register
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is read at least once. This means that the cause for the alarm may
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already have disappeared! Note that in the current implementation, all
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hardware registers are read whenever any data is read (unless it is less
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than 1.5 seconds since the last update). This means that you can easily
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miss once-only alarms.
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The chips only update values each 1.5 seconds; reading them more often
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will do no harm, but will return 'old' values.
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AS99127F PROBLEMS
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-----------------
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The as99127f support was developed without the benefit of a datasheet.
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In most cases it is treated as a w83781d (although revision 2 of the
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AS99127F looks more like a w83782d).
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This support will be BETA until a datasheet is released.
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One user has reported problems with fans stopping
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occasionally.
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Note that the individual beep bits are inverted from the other chips.
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The driver now takes care of this so that user-space applications
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don't have to know about it.
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Known problems:
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- Problems with diode/thermistor settings (supported?)
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- One user reports fans stopping under high server load.
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- Revision 2 seems to have 2 PWM registers but we don't know
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how to handle them. More details below.
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These will not be fixed unless we get a datasheet.
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If you have problems, please lobby Asus to release a datasheet.
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Unfortunately several others have without success.
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Please do not send mail to us asking for better as99127f support.
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We have done the best we can without a datasheet.
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Please do not send mail to the author or the sensors group asking for
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a datasheet or ideas on how to convince Asus. We can't help.
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NOTES:
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-----
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783s has no in1 so that in[2-6] are compatible with the 781d/782d.
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783s pin is programmable for -5V or temp1; defaults to -5V,
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no control in driver so temp1 doesn't work.
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782d and 783s datasheets differ on which is pwm1 and which is pwm2.
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We chose to follow 782d.
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782d and 783s pin is programmable for fan3 input or pwm2 output;
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defaults to fan3 input.
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If pwm2 is enabled (with echo 255 1 > pwm2), then
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fan3 will report 0.
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782d has pwm1-2 for ISA, pwm1-4 for i2c. (pwm3-4 share pins with
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the ISA pins)
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Data sheet updates:
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------------------
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- PWM clock registers:
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000: master / 512
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001: master / 1024
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010: master / 2048
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011: master / 4096
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100: master / 8192
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Answers from Winbond tech support
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---------------------------------
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>
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> 1) In the W83781D data sheet section 7.2 last paragraph, it talks about
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> reprogramming the R-T table if the Beta of the thermistor is not
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> 3435K. The R-T table is described briefly in section 8.20.
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> What formulas do I use to program a new R-T table for a given Beta?
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>
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We are sorry that the calculation for R-T table value is
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confidential. If you have another Beta value of thermistor, we can help
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to calculate the R-T table for you. But you should give us real R-T
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Table which can be gotten by thermistor vendor. Therefore we will calculate
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them and obtain 32-byte data, and you can fill the 32-byte data to the
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register in Bank0.CR51 of W83781D.
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> 2) In the W83782D data sheet, it mentions that pins 38, 39, and 40 are
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> programmable to be either thermistor or Pentium II diode inputs.
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> How do I program them for diode inputs? I can't find any register
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> to program these to be diode inputs.
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--> You may program Bank0 CR[5Dh] and CR[59h] registers.
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CR[5Dh] bit 1(VTIN1) bit 2(VTIN2) bit 3(VTIN3)
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thermistor 0 0 0
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diode 1 1 1
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(error) CR[59h] bit 4(VTIN1) bit 2(VTIN2) bit 3(VTIN3)
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(right) CR[59h] bit 4(VTIN1) bit 5(VTIN2) bit 6(VTIN3)
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PII thermal diode 1 1 1
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2N3904 diode 0 0 0
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Asus Clones
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-----------
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We have no datasheets for the Asus clones (AS99127F and ASB100 Bach).
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Here are some very useful information that were given to us by Alex Van
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Kaam about how to detect these chips, and how to read their values. He
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also gives advice for another Asus chipset, the Mozart-2 (which we
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don't support yet). Thanks Alex!
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I reworded some parts and added personal comments.
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# Detection:
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AS99127F rev.1, AS99127F rev.2 and ASB100:
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- I2C address range: 0x29 - 0x2F
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- If register 0x58 holds 0x31 then we have an Asus (either ASB100 or
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AS99127F)
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- Which one depends on register 0x4F (manufacturer ID):
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0x06 or 0x94: ASB100
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0x12 or 0xC3: AS99127F rev.1
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0x5C or 0xA3: AS99127F rev.2
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Note that 0x5CA3 is Winbond's ID (WEC), which let us think Asus get their
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AS99127F rev.2 direct from Winbond. The other codes mean ATT and DVC,
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respectively. ATT could stand for Asustek something (although it would be
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very badly chosen IMHO), I don't know what DVC could stand for. Maybe
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these codes simply aren't meant to be decoded that way.
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Mozart-2:
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- I2C address: 0x77
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- If register 0x58 holds 0x56 or 0x10 then we have a Mozart-2
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- Of the Mozart there are 3 types:
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0x58=0x56, 0x4E=0x94, 0x4F=0x36: Asus ASM58 Mozart-2
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0x58=0x56, 0x4E=0x94, 0x4F=0x06: Asus AS2K129R Mozart-2
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0x58=0x10, 0x4E=0x5C, 0x4F=0xA3: Asus ??? Mozart-2
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You can handle all 3 the exact same way :)
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# Temperature sensors:
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ASB100:
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- sensor 1: register 0x27
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- sensor 2 & 3 are the 2 LM75's on the SMBus
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- sensor 4: register 0x17
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Remark: I noticed that on Intel boards sensor 2 is used for the CPU
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and 4 is ignored/stuck, on AMD boards sensor 4 is the CPU and sensor 2 is
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either ignored or a socket temperature.
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AS99127F (rev.1 and 2 alike):
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- sensor 1: register 0x27
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- sensor 2 & 3 are the 2 LM75's on the SMBus
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Remark: Register 0x5b is suspected to be temperature type selector. Bit 1
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would control temp1, bit 3 temp2 and bit 5 temp3.
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Mozart-2:
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- sensor 1: register 0x27
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- sensor 2: register 0x13
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# Fan sensors:
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ASB100, AS99127F (rev.1 and 2 alike):
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- 3 fans, identical to the W83781D
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Mozart-2:
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- 2 fans only, 1350000/RPM/div
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- fan 1: register 0x28, divisor on register 0xA1 (bits 4-5)
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- fan 2: register 0x29, divisor on register 0xA1 (bits 6-7)
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# Voltages:
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This is where there is a difference between AS99127F rev.1 and 2.
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Remark: The difference is similar to the difference between
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W83781D and W83782D.
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ASB100:
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in0=r(0x20)*0.016
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in1=r(0x21)*0.016
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in2=r(0x22)*0.016
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in3=r(0x23)*0.016*1.68
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in4=r(0x24)*0.016*3.8
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in5=r(0x25)*(-0.016)*3.97
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in6=r(0x26)*(-0.016)*1.666
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AS99127F rev.1:
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in0=r(0x20)*0.016
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in1=r(0x21)*0.016
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in2=r(0x22)*0.016
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in3=r(0x23)*0.016*1.68
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in4=r(0x24)*0.016*3.8
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in5=r(0x25)*(-0.016)*3.97
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in6=r(0x26)*(-0.016)*1.503
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AS99127F rev.2:
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in0=r(0x20)*0.016
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in1=r(0x21)*0.016
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in2=r(0x22)*0.016
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in3=r(0x23)*0.016*1.68
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in4=r(0x24)*0.016*3.8
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in5=(r(0x25)*0.016-3.6)*5.14+3.6
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in6=(r(0x26)*0.016-3.6)*3.14+3.6
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Mozart-2:
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in0=r(0x20)*0.016
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in1=255
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in2=r(0x22)*0.016
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in3=r(0x23)*0.016*1.68
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in4=r(0x24)*0.016*4
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in5=255
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in6=255
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# PWM
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* Additional info about PWM on the AS99127F (may apply to other Asus
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chips as well) by Jean Delvare as of 2004-04-09:
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AS99127F revision 2 seems to have two PWM registers at 0x59 and 0x5A,
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and a temperature sensor type selector at 0x5B (which basically means
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that they swapped registers 0x59 and 0x5B when you compare with Winbond
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chips).
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Revision 1 of the chip also has the temperature sensor type selector at
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0x5B, but PWM registers have no effect.
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We don't know exactly how the temperature sensor type selection works.
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Looks like bits 1-0 are for temp1, bits 3-2 for temp2 and bits 5-4 for
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temp3, although it is possible that only the most significant bit matters
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each time. So far, values other than 0 always broke the readings.
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PWM registers seem to be split in two parts: bit 7 is a mode selector,
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while the other bits seem to define a value or threshold.
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When bit 7 is clear, bits 6-0 seem to hold a threshold value. If the value
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is below a given limit, the fan runs at low speed. If the value is above
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the limit, the fan runs at full speed. We have no clue as to what the limit
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represents. Note that there seem to be some inertia in this mode, speed
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changes may need some time to trigger. Also, an hysteresis mechanism is
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suspected since walking through all the values increasingly and then
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decreasingly led to slightly different limits.
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When bit 7 is set, bits 3-0 seem to hold a threshold value, while bits 6-4
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would not be significant. If the value is below a given limit, the fan runs
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at full speed, while if it is above the limit it runs at low speed (so this
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is the contrary of the other mode, in a way). Here again, we don't know
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what the limit is supposed to represent.
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One remarkable thing is that the fans would only have two or three
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different speeds (transitional states left apart), not a whole range as
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you usually get with PWM.
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As a conclusion, you can write 0x00 or 0x8F to the PWM registers to make
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fans run at low speed, and 0x7F or 0x80 to make them run at full speed.
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Please contact us if you can figure out how it is supposed to work. As
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long as we don't know more, the w83781d driver doesn't handle PWM on
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AS99127F chips at all.
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* Additional info about PWM on the AS99127F rev.1 by Hector Martin:
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I've been fiddling around with the (in)famous 0x59 register and
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found out the following values do work as a form of coarse pwm:
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0x80 - seems to turn fans off after some time(1-2 minutes)... might be
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some form of auto-fan-control based on temp? hmm (Qfan? this mobo is an
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old ASUS, it isn't marketed as Qfan. Maybe some beta pre-attempt at Qfan
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that was dropped at the BIOS)
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0x81 - off
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0x82 - slightly "on-ner" than off, but my fans do not get to move. I can
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hear the high-pitched PWM sound that motors give off at too-low-pwm.
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0x83 - now they do move. Estimate about 70% speed or so.
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0x84-0x8f - full on
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Changing the high nibble doesn't seem to do much except the high bit
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(0x80) must be set for PWM to work, else the current pwm doesn't seem to
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change.
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My mobo is an ASUS A7V266-E. This behavior is similar to what I got
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with speedfan under Windows, where 0-15% would be off, 15-2x% (can't
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remember the exact value) would be 70% and higher would be full on.
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* Additional info about PWM on the AS99127F rev.1 from lm-sensors
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ticket #2350:
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I conducted some experiment on Asus P3B-F motherboard with AS99127F
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(Ver. 1).
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I confirm that 0x59 register control the CPU_Fan Header on this
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motherboard, and 0x5a register control PWR_Fan.
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In order to reduce the dependency of specific fan, the measurement is
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conducted with a digital scope without fan connected. I found out that
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P3B-F actually output variable DC voltage on fan header center pin,
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looks like PWM is filtered on this motherboard.
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Here are some of measurements:
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0x80 20 mV
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0x81 20 mV
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0x82 232 mV
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0x83 1.2 V
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0x84 2.31 V
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|
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
|