| 1 | Kernel driver `asb100.o' |
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| 2 | ======================== |
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| 3 | |
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| 4 | Status: Work in progress |
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| 5 | |
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| 6 | Supported Chips: |
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| 7 | * Asus ASB100 and ASB100-A "Bach" |
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| 8 | Prefix: 'asb100' |
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| 9 | Addresses scanned: I2C 0x2d |
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| 10 | Datasheet: none released |
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| 11 | |
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| 12 | Author: Mark M. Hoffman <mhoffman@lightlink.com> |
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| 13 | |
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| 14 | Module Parameters |
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| 15 | ----------------- |
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| 16 | |
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| 17 | <TODO: fill in here> |
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| 18 | |
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| 19 | Asus' BIOS is often broken |
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| 20 | -------------------------- |
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| 21 | |
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| 22 | If you have an Asus P4PE, you need to read prog/hotplug/README.p4b. |
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| 23 | |
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| 24 | If you have any other (Asus) board for which sensors-detect finds neither |
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| 25 | asb100 nor an I2C bus, please read prog/hotplug/README.p4b before sending |
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| 26 | a bug report. |
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| 27 | |
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| 28 | Description |
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| 29 | ----------- |
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| 30 | |
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| 31 | This driver implements support for the Asus ASB100 and ASB100-A "Bach". These |
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| 32 | are custom ASICs available only on Asus mainboards. Asus refuses to supply a |
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| 33 | datasheet for these chips. Thanks go to many people who helped investigate |
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| 34 | their hardware, including: |
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| 35 | |
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| 36 | Vitaly V. Bursov |
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| 37 | Alexander van Kaam (author of MBM for Windows) |
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| 38 | Bertrik Sikken |
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| 39 | |
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| 40 | The ASB100 implements seven voltage sensors, three fan rotation speed sensors, |
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| 41 | four temperature sensors, VID lines and alarms. In addition to these, the |
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| 42 | ASB100-A also implements a single PWM controller for fans 2 and 3 (i.e. one |
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| 43 | setting controls both.) If you have a plain ASB100, the pwm controller will |
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| 44 | simply not work (or maybe it will for you... it doesn't for me). |
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| 45 | |
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| 46 | Temperatures are measured and reported in degrees Celsius. |
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| 47 | |
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| 48 | Fan speeds are reported in RPM (rotations per minute). An alarm is triggered |
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| 49 | if the rotation speed has dropped below a programmable limit. |
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| 50 | |
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| 51 | Voltage sensors (also known as IN sensors) report values in volts. |
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| 52 | |
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| 53 | The VID lines encode the core voltage value: the voltage level your processor |
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| 54 | should work with. This is hardcoded by the mainboard and/or processor itself. |
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| 55 | It is a value in volts. |
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| 56 | |
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| 57 | Alarms: (TODO question marks indicate may or may not work) |
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| 58 | |
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| 59 | 0x0001 => in0 (?) |
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| 60 | 0x0002 => in1 (?) |
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| 61 | 0x0004 => in2 |
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| 62 | 0x0008 => in3 |
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| 63 | 0x0010 => temp1 (1) |
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| 64 | 0x0020 => temp2 |
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| 65 | 0x0040 => fan1 |
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| 66 | 0x0080 => fan2 |
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| 67 | 0x0100 => in4 |
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| 68 | 0x0200 => in5 (?) (2) |
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| 69 | 0x0400 => in6 (?) (2) |
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| 70 | 0x0800 => fan3 |
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| 71 | 0x1000 => chassis switch |
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| 72 | 0x2000 => temp3 |
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| 73 | |
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| 74 | Alarm Notes: |
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| 75 | |
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| 76 | (1) This alarm will only trigger if the hysteresis value is 127C. |
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| 77 | I.e. it behaves the same as w83781d. |
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| 78 | |
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| 79 | (2) The min and max registers for these values appear to |
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| 80 | be read-only or otherwise stuck at 0x00. |
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| 81 | |
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| 82 | TODO: |
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| 83 | * Experiment with fan divisors > 8. |
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| 84 | * Experiment with temp. sensor types. |
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| 85 | * Are there really 13 voltage inputs? Probably not... |
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| 86 | * Fix bogus client deregistration (like w83781d in 2.6). |
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| 87 | * Fix fan divisor / fan minimum interaction (like lm78). |
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| 88 | * Cleanups, no doubt... |
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| 89 | |
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