Root/
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 <mhoffman@lightlink.com> |
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 | |
73 |
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