| 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 |
| |
| .. [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... |
