1*ccf988b6SMauro Carvalho Chehab======================== 2*ccf988b6SMauro Carvalho ChehabKernel driver i2c-viapro 3*ccf988b6SMauro Carvalho Chehab======================== 4*ccf988b6SMauro Carvalho Chehab 5*ccf988b6SMauro Carvalho ChehabSupported adapters: 6*ccf988b6SMauro Carvalho Chehab * VIA Technologies, Inc. VT82C596A/B 7*ccf988b6SMauro Carvalho Chehab Datasheet: Sometimes available at the VIA website 8*ccf988b6SMauro Carvalho Chehab 9*ccf988b6SMauro Carvalho Chehab * VIA Technologies, Inc. VT82C686A/B 10*ccf988b6SMauro Carvalho Chehab Datasheet: Sometimes available at the VIA website 11*ccf988b6SMauro Carvalho Chehab 12*ccf988b6SMauro Carvalho Chehab * VIA Technologies, Inc. VT8231, VT8233, VT8233A 13*ccf988b6SMauro Carvalho Chehab Datasheet: available on request from VIA 14*ccf988b6SMauro Carvalho Chehab 15*ccf988b6SMauro Carvalho Chehab * VIA Technologies, Inc. VT8235, VT8237R, VT8237A, VT8237S, VT8251 16*ccf988b6SMauro Carvalho Chehab Datasheet: available on request and under NDA from VIA 17*ccf988b6SMauro Carvalho Chehab 18*ccf988b6SMauro Carvalho Chehab * VIA Technologies, Inc. CX700 19*ccf988b6SMauro Carvalho Chehab Datasheet: available on request and under NDA from VIA 20*ccf988b6SMauro Carvalho Chehab 21*ccf988b6SMauro Carvalho Chehab * VIA Technologies, Inc. VX800/VX820 22*ccf988b6SMauro Carvalho Chehab Datasheet: available on http://linux.via.com.tw 23*ccf988b6SMauro Carvalho Chehab 24*ccf988b6SMauro Carvalho Chehab * VIA Technologies, Inc. VX855/VX875 25*ccf988b6SMauro Carvalho Chehab Datasheet: available on http://linux.via.com.tw 26*ccf988b6SMauro Carvalho Chehab 27*ccf988b6SMauro Carvalho Chehab * VIA Technologies, Inc. VX900 28*ccf988b6SMauro Carvalho Chehab Datasheet: available on http://linux.via.com.tw 29*ccf988b6SMauro Carvalho Chehab 30*ccf988b6SMauro Carvalho ChehabAuthors: 31*ccf988b6SMauro Carvalho Chehab - Kyösti Mälkki <kmalkki@cc.hut.fi>, 32*ccf988b6SMauro Carvalho Chehab - Mark D. Studebaker <mdsxyz123@yahoo.com>, 33*ccf988b6SMauro Carvalho Chehab - Jean Delvare <jdelvare@suse.de> 34*ccf988b6SMauro Carvalho Chehab 35*ccf988b6SMauro Carvalho ChehabModule Parameters 36*ccf988b6SMauro Carvalho Chehab----------------- 37*ccf988b6SMauro Carvalho Chehab 38*ccf988b6SMauro Carvalho Chehab* force: int 39*ccf988b6SMauro Carvalho Chehab Forcibly enable the SMBus controller. DANGEROUS! 40*ccf988b6SMauro Carvalho Chehab* force_addr: int 41*ccf988b6SMauro Carvalho Chehab Forcibly enable the SMBus at the given address. EXTREMELY DANGEROUS! 42*ccf988b6SMauro Carvalho Chehab 43*ccf988b6SMauro Carvalho ChehabDescription 44*ccf988b6SMauro Carvalho Chehab----------- 45*ccf988b6SMauro Carvalho Chehab 46*ccf988b6SMauro Carvalho Chehabi2c-viapro is a true SMBus host driver for motherboards with one of the 47*ccf988b6SMauro Carvalho Chehabsupported VIA south bridges. 48*ccf988b6SMauro Carvalho Chehab 49*ccf988b6SMauro Carvalho ChehabYour ``lspci -n`` listing must show one of these : 50*ccf988b6SMauro Carvalho Chehab 51*ccf988b6SMauro Carvalho Chehab ================ ====================== 52*ccf988b6SMauro Carvalho Chehab device 1106:3050 (VT82C596A function 3) 53*ccf988b6SMauro Carvalho Chehab device 1106:3051 (VT82C596B function 3) 54*ccf988b6SMauro Carvalho Chehab device 1106:3057 (VT82C686 function 4) 55*ccf988b6SMauro Carvalho Chehab device 1106:3074 (VT8233) 56*ccf988b6SMauro Carvalho Chehab device 1106:3147 (VT8233A) 57*ccf988b6SMauro Carvalho Chehab device 1106:8235 (VT8231 function 4) 58*ccf988b6SMauro Carvalho Chehab device 1106:3177 (VT8235) 59*ccf988b6SMauro Carvalho Chehab device 1106:3227 (VT8237R) 60*ccf988b6SMauro Carvalho Chehab device 1106:3337 (VT8237A) 61*ccf988b6SMauro Carvalho Chehab device 1106:3372 (VT8237S) 62*ccf988b6SMauro Carvalho Chehab device 1106:3287 (VT8251) 63*ccf988b6SMauro Carvalho Chehab device 1106:8324 (CX700) 64*ccf988b6SMauro Carvalho Chehab device 1106:8353 (VX800/VX820) 65*ccf988b6SMauro Carvalho Chehab device 1106:8409 (VX855/VX875) 66*ccf988b6SMauro Carvalho Chehab device 1106:8410 (VX900) 67*ccf988b6SMauro Carvalho Chehab ================ ====================== 68*ccf988b6SMauro Carvalho Chehab 69*ccf988b6SMauro Carvalho ChehabIf none of these show up, you should look in the BIOS for settings like 70*ccf988b6SMauro Carvalho Chehabenable ACPI / SMBus or even USB. 71*ccf988b6SMauro Carvalho Chehab 72*ccf988b6SMauro Carvalho ChehabExcept for the oldest chips (VT82C596A/B, VT82C686A and most probably 73*ccf988b6SMauro Carvalho ChehabVT8231), this driver supports I2C block transactions. Such transactions 74*ccf988b6SMauro Carvalho Chehabare mainly useful to read from and write to EEPROMs. 75*ccf988b6SMauro Carvalho Chehab 76*ccf988b6SMauro Carvalho ChehabThe CX700/VX800/VX820 additionally appears to support SMBus PEC, although 77*ccf988b6SMauro Carvalho Chehabthis driver doesn't implement it yet. 78