1Kernel driver asb100 2==================== 3 4Supported 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 14Author: Mark M. Hoffman <mhoffman@lightlink.com> 15 16Description 17----------- 18 19This driver implements support for the Asus ASB100 and ASB100-A "Bach". 20These are custom ASICs available only on Asus mainboards. Asus refuses to 21supply a datasheet for these chips. Thanks go to many people who helped 22investigate their hardware, including: 23 24Vitaly V. Bursov 25Alexander van Kaam (author of MBM for Windows) 26Bertrik Sikken 27 28The ASB100 implements seven voltage sensors, three fan rotation speed 29sensors, four temperature sensors, VID lines and alarms. In addition to 30these, the ASB100-A also implements a single PWM controller for fans 2 and 313 (i.e. one setting controls both.) If you have a plain ASB100, the PWM 32controller will simply not work (or maybe it will for you... it doesn't for 33me). 34 35Temperatures are measured and reported in degrees Celsius. 36 37Fan speeds are reported in RPM (rotations per minute). An alarm is 38triggered if the rotation speed has dropped below a programmable limit. 39 40Voltage sensors (also known as IN sensors) report values in volts. 41 42The VID lines encode the core voltage value: the voltage level your 43processor should work with. This is hardcoded by the mainboard and/or 44processor itself. It is a value in volts. 45 46Alarms: (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 69TODO: 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... 74