74 lines
2.1 KiB
ReStructuredText
74 lines
2.1 KiB
ReStructuredText
Kernel driver asb100
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====================
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Supported Chips:
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* Asus ASB100 and ASB100-A "Bach"
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Prefix: 'asb100'
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Addresses scanned: I2C 0x2d
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Datasheet: none released
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Author: Mark M. Hoffman <mhoffman@lightlink.com>
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Description
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-----------
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This driver implements support for the Asus ASB100 and ASB100-A "Bach".
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These are custom ASICs available only on Asus mainboards. Asus refuses to
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supply a datasheet for these chips. Thanks go to many people who helped
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investigate their hardware, including:
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Vitaly V. Bursov
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Alexander van Kaam (author of MBM for Windows)
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Bertrik Sikken
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The ASB100 implements seven voltage sensors, three fan rotation speed
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sensors, four temperature sensors, VID lines and alarms. In addition to
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these, the ASB100-A also implements a single PWM controller for fans 2 and
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3 (i.e. one setting controls both.) If you have a plain ASB100, the PWM
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controller will simply not work (or maybe it will for you... it doesn't for
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me).
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Temperatures are measured and reported in degrees Celsius.
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Fan 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.
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Voltage sensors (also known as IN sensors) report values in volts.
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The VID lines encode the core voltage value: the voltage level your
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processor should work with. This is hardcoded by the mainboard and/or
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processor itself. It is a value in volts.
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Alarms: (TODO question marks indicate may or may not work)
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- 0x0001 => in0 (?)
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- 0x0002 => in1 (?)
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- 0x0004 => in2
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- 0x0008 => in3
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- 0x0010 => temp1 [1]_
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- 0x0020 => temp2
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- 0x0040 => fan1
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- 0x0080 => fan2
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- 0x0100 => in4
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- 0x0200 => in5 (?) [2]_
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- 0x0400 => in6 (?) [2]_
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- 0x0800 => fan3
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- 0x1000 => chassis switch
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- 0x2000 => temp3
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.. [1] This alarm will only trigger if the hysteresis value is 127C.
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I.e. it behaves the same as w83781d.
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.. [2] The min and max registers for these values appear to
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be read-only or otherwise stuck at 0x00.
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TODO:
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* Experiment with fan divisors > 8.
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* Experiment with temp. sensor types.
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* Are there really 13 voltage inputs? Probably not...
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* Cleanups, no doubt...
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