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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 | |||