About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Documentation / hwmon / asb100




Custom Search

Based on kernel version 3.13. Page generated on 2014-01-20 22:03 EST.

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...
Hide Line Numbers
About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Information is copyright its respective author. All material is available from the Linux Kernel Source distributed under a GPL License. This page is provided as a free service by mjmwired.net.