1Kernel driver i2c-viapro
2
3Supported adapters:
4  * VIA Technologies, Inc. VT82C596A/B
5    Datasheet: Sometimes available at the VIA website
6
7  * VIA Technologies, Inc. VT82C686A/B
8    Datasheet: Sometimes available at the VIA website
9
10  * VIA Technologies, Inc. VT8231, VT8233, VT8233A
11    Datasheet: available on request from VIA
12
13  * VIA Technologies, Inc. VT8235, VT8237R, VT8237A, VT8237S, VT8251
14    Datasheet: available on request and under NDA from VIA
15
16  * VIA Technologies, Inc. CX700
17    Datasheet: available on request and under NDA from VIA
18
19  * VIA Technologies, Inc. VX800/VX820
20    Datasheet: available on http://linux.via.com.tw
21
22  * VIA Technologies, Inc. VX855/VX875
23    Datasheet: available on http://linux.via.com.tw
24
25  * VIA Technologies, Inc. VX900
26    Datasheet: available on http://linux.via.com.tw
27
28Authors:
29	Ky��sti M��lkki <kmalkki@cc.hut.fi>,
30	Mark D. Studebaker <mdsxyz123@yahoo.com>,
31	Jean Delvare <jdelvare@suse.de>
32
33Module Parameters
34-----------------
35
36* force: int
37  Forcibly enable the SMBus controller. DANGEROUS!
38* force_addr: int
39  Forcibly enable the SMBus at the given address. EXTREMELY DANGEROUS!
40
41Description
42-----------
43
44i2c-viapro is a true SMBus host driver for motherboards with one of the
45supported VIA south bridges.
46
47Your lspci -n listing must show one of these :
48
49 device 1106:3050   (VT82C596A function 3)
50 device 1106:3051   (VT82C596B function 3)
51 device 1106:3057   (VT82C686 function 4)
52 device 1106:3074   (VT8233)
53 device 1106:3147   (VT8233A)
54 device 1106:8235   (VT8231 function 4)
55 device 1106:3177   (VT8235)
56 device 1106:3227   (VT8237R)
57 device 1106:3337   (VT8237A)
58 device 1106:3372   (VT8237S)
59 device 1106:3287   (VT8251)
60 device 1106:8324   (CX700)
61 device 1106:8353   (VX800/VX820)
62 device 1106:8409   (VX855/VX875)
63 device 1106:8410   (VX900)
64
65If none of these show up, you should look in the BIOS for settings like
66enable ACPI / SMBus or even USB.
67
68Except for the oldest chips (VT82C596A/B, VT82C686A and most probably
69VT8231), this driver supports I2C block transactions. Such transactions
70are mainly useful to read from and write to EEPROMs.
71
72The CX700/VX800/VX820 additionally appears to support SMBus PEC, although
73this driver doesn't implement it yet.
74