1 Kernel driver asb100 2 ==================== 3 4 Supported Chips: 5 6 * Asus ASB100 and ASB100-A "Bach" 7 8 Prefix: 'asb100' 9 10 Addresses scanned: I2C 0x2d 11 12 Datasheet: none released 13 14 Author: Mark M. Hoffman <mhoffman@lightlink.com> 15 16 Description 17 ----------- 18 19 This driver implements support for the Asus ASB100 and ASB100-A "Bach". 20 These are custom ASICs available only on Asus mainboards. Asus refuses to 21 supply a datasheet for these chips. Thanks go to many people who helped 22 investigate their hardware, including: 23 24 Vitaly V. Bursov 25 Alexander van Kaam (author of MBM for Windows) 26 Bertrik Sikken 27 28 The ASB100 implements seven voltage sensors, three fan rotation speed 29 sensors, four temperature sensors, VID lines and alarms. In addition to 30 these, the ASB100-A also implements a single PWM controller for fans 2 and 31 3 (i.e. one setting controls both.) If you have a plain ASB100, the PWM 32 controller will simply not work (or maybe it will for you... it doesn't for 33 me). 34 35 Temperatures are measured and reported in degrees Celsius. 36 37 Fan speeds are reported in RPM (rotations per minute). An alarm is 38 triggered if the rotation speed has dropped below a programmable limit. 39 40 Voltage sensors (also known as IN sensors) report values in volts. 41 42 The VID lines encode the core voltage value: the voltage level your 43 processor should work with. This is hardcoded by the mainboard and/or 44 processor itself. It is a value in volts. 45 46 Alarms: (TODO question marks indicate may or may not work) 47 48 - 0x0001 => in0 (?) 49 - 0x0002 => in1 (?) 50 - 0x0004 => in2 51 - 0x0008 => in3 52 - 0x0010 => temp1 [1]_ 53 - 0x0020 => temp2 54 - 0x0040 => fan1 55 - 0x0080 => fan2 56 - 0x0100 => in4 57 - 0x0200 => in5 (?) [2]_ 58 - 0x0400 => in6 (?) [2]_ 59 - 0x0800 => fan3 60 - 0x1000 => chassis switch 61 - 0x2000 => temp3 62 63 .. [1] This alarm will only trigger if the hysteresis value is 127C. 64 I.e. it behaves the same as w83781d. 65 66 .. [2] The min and max registers for these values appear to 67 be read-only or otherwise stuck at 0x00. 68 69 TODO: 70 * Experiment with fan divisors > 8. 71 * Experiment with temp. sensor types. 72 * Are there really 13 voltage inputs? Probably not... 73 * Cleanups, no doubt...
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