projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 7f15b664 RM |
1 | Kernel driver asb100 |
| 2 | ==================== | |
| 3 | ||
| 4 | Supported Chips: | |
| 5 | * Asus ASB100 and ASB100-A "Bach" | |
| 6 | Prefix: 'asb100' | |
| 7 | Addresses scanned: I2C 0x2d | |
| 8 | Datasheet: none released | |
| 9 | ||
| 10 | Author: Mark M. Hoffman <[email protected]> | |
| 11 | ||
| 12 | Description | |
| 13 | ----------- | |
| 14 | ||
| 15 | This driver implements support for the Asus ASB100 and ASB100-A "Bach". | |
| 16 | These are custom ASICs available only on Asus mainboards. Asus refuses to | |
| 17 | supply a datasheet for these chips. Thanks go to many people who helped | |
| 18 | investigate their hardware, including: | |
| 19 | ||
| 20 | Vitaly V. Bursov | |
| 21 | Alexander van Kaam (author of MBM for Windows) | |
| 22 | Bertrik Sikken | |
| 23 | ||
| 24 | The ASB100 implements seven voltage sensors, three fan rotation speed | |
| 25 | sensors, four temperature sensors, VID lines and alarms. In addition to | |
| 26 | these, the ASB100-A also implements a single PWM controller for fans 2 and | |
| 27 | 3 (i.e. one setting controls both.) If you have a plain ASB100, the PWM | |
| 28 | controller will simply not work (or maybe it will for you... it doesn't for | |
| 29 | me). | |
| 30 | ||
| 31 | Temperatures are measured and reported in degrees Celsius. | |
| 32 | ||
| 33 | Fan speeds are reported in RPM (rotations per minute). An alarm is | |
| 34 | triggered if the rotation speed has dropped below a programmable limit. | |
| 35 | ||
| 36 | Voltage sensors (also known as IN sensors) report values in volts. | |
| 37 | ||
| 38 | The VID lines encode the core voltage value: the voltage level your | |
| 39 | processor should work with. This is hardcoded by the mainboard and/or | |
| 40 | processor itself. It is a value in volts. | |
| 41 | ||
| 42 | Alarms: (TODO question marks indicate may or may not work) | |
| 43 | ||
| 44 | 0x0001 => in0 (?) | |
| 45 | 0x0002 => in1 (?) | |
| 46 | 0x0004 => in2 | |
| 47 | 0x0008 => in3 | |
| 48 | 0x0010 => temp1 (1) | |
| 49 | 0x0020 => temp2 | |
| 50 | 0x0040 => fan1 | |
| 51 | 0x0080 => fan2 | |
| 52 | 0x0100 => in4 | |
| 53 | 0x0200 => in5 (?) (2) | |
| 54 | 0x0400 => in6 (?) (2) | |
| 55 | 0x0800 => fan3 | |
| 56 | 0x1000 => chassis switch | |
| 57 | 0x2000 => temp3 | |
| 58 | ||
| 59 | Alarm Notes: | |
| 60 | ||
| 61 | (1) This alarm will only trigger if the hysteresis value is 127C. | |
| 62 | I.e. it behaves the same as w83781d. | |
| 63 | ||
| 64 | (2) The min and max registers for these values appear to | |
| 65 | be read-only or otherwise stuck at 0x00. | |
| 66 | ||
| 67 | TODO: | |
| 68 | * Experiment with fan divisors > 8. | |
| 69 | * Experiment with temp. sensor types. | |
| 70 | * Are there really 13 voltage inputs? Probably not... | |
| 71 | * Cleanups, no doubt... | |
| 72 |