i2c-viapro

linux 内核源代码

Kernel driver i2c-viapro

Supported adapters:
  * VIA Technologies, Inc. VT82C596A/B
    Datasheet: Sometimes available at the VIA website

  * VIA Technologies, Inc. VT82C686A/B
    Datasheet: Sometimes available at the VIA website

  * VIA Technologies, Inc. VT8231, VT8233, VT8233A
    Datasheet: available on request from VIA

  * VIA Technologies, Inc. VT8235, VT8237R, VT8237A, VT8251
    Datasheet: available on request and under NDA from VIA

  * VIA Technologies, Inc. CX700
    Datasheet: available on request and under NDA from VIA

Authors:
	Kyösti Mälkki <[e-mail]>,
	Mark D. Studebaker <[e-mail]>,
	Jean Delvare <[e-mail]>

Module Parameters
-----------------

* force: int
  Forcibly enable the SMBus controller. DANGEROUS!
* force_addr: int
  Forcibly enable the SMBus at the given address. EXTREMELY DANGEROUS!

Description
-----------

i2c-viapro is a true SMBus host driver for motherboards with one of the
supported VIA south bridges.

Your lspci -n listing must show one of these :

 device 1106:3050   (VT82C596A function 3)
 device 1106:3051   (VT82C596B function 3)
 device 1106:3057   (VT82C686 function 4)
 device 1106:3074   (VT8233)
 device 1106:3147   (VT8233A)
 device 1106:8235   (VT8231 function 4)
 device 1106:3177   (VT8235)
 device 1106:3227   (VT8237R)
 device 1106:3337   (VT8237A)
 device 1106:3287   (VT8251)
 device 1106:8324   (CX700)

If none of these show up, you should look in the BIOS for settings like
enable ACPI / SMBus or even USB.

Except for the oldest chips (VT82C596A/B, VT82C686A and most probably
VT8231), this driver supports I2C block transactions. Such transactions
are mainly useful to read from and write to EEPROMs.

The CX700 additionally appears to support SMBus PEC, although this driver
doesn't implement it yet.