1======================== 2Kernel driver i2c-viapro 3======================== 4 5Supported adapters: 6 * VIA Technologies, Inc. VT82C596A/B 7 Datasheet: Sometimes available at the VIA website 8 9 * VIA Technologies, Inc. VT82C686A/B 10 Datasheet: Sometimes available at the VIA website 11 12 * VIA Technologies, Inc. VT8231, VT8233, VT8233A 13 Datasheet: available on request from VIA 14 15 * VIA Technologies, Inc. VT8235, VT8237R, VT8237A, VT8237S, VT8251 16 Datasheet: available on request and under NDA from VIA 17 18 * VIA Technologies, Inc. CX700 19 Datasheet: available on request and under NDA from VIA 20 21 * VIA Technologies, Inc. VX800/VX820 22 Datasheet: available on http://linux.via.com.tw 23 24 * VIA Technologies, Inc. VX855/VX875 25 Datasheet: available on http://linux.via.com.tw 26 27 * VIA Technologies, Inc. VX900 28 Datasheet: available on http://linux.via.com.tw 29 30Authors: 31 - Kyösti Mälkki <kmalkki@cc.hut.fi>, 32 - Mark D. Studebaker <mdsxyz123@yahoo.com>, 33 - Jean Delvare <jdelvare@suse.de> 34 35Module Parameters 36----------------- 37 38* force: int 39 Forcibly enable the SMBus controller. DANGEROUS! 40* force_addr: int 41 Forcibly enable the SMBus at the given address. EXTREMELY DANGEROUS! 42 43Description 44----------- 45 46i2c-viapro is a true SMBus host driver for motherboards with one of the 47supported VIA south bridges. 48 49Your ``lspci -n`` listing must show one of these : 50 51 ================ ====================== 52 device 1106:3050 (VT82C596A function 3) 53 device 1106:3051 (VT82C596B function 3) 54 device 1106:3057 (VT82C686 function 4) 55 device 1106:3074 (VT8233) 56 device 1106:3147 (VT8233A) 57 device 1106:8235 (VT8231 function 4) 58 device 1106:3177 (VT8235) 59 device 1106:3227 (VT8237R) 60 device 1106:3337 (VT8237A) 61 device 1106:3372 (VT8237S) 62 device 1106:3287 (VT8251) 63 device 1106:8324 (CX700) 64 device 1106:8353 (VX800/VX820) 65 device 1106:8409 (VX855/VX875) 66 device 1106:8410 (VX900) 67 ================ ====================== 68 69If none of these show up, you should look in the BIOS for settings like 70enable ACPI / SMBus or even USB. 71 72Except for the oldest chips (VT82C596A/B, VT82C686A and most probably 73VT8231), this driver supports I2C block transactions. Such transactions 74are mainly useful to read from and write to EEPROMs. 75 76The CX700/VX800/VX820 additionally appears to support SMBus PEC, although 77this driver doesn't implement it yet. 78