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