0001 ========================
0002 Kernel driver i2c-viapro
0003 ========================
0004
0005 Supported adapters:
0006 * VIA Technologies, Inc. VT82C596A/B
0007 Datasheet: Sometimes available at the VIA website
0008
0009 * VIA Technologies, Inc. VT82C686A/B
0010 Datasheet: Sometimes available at the VIA website
0011
0012 * VIA Technologies, Inc. VT8231, VT8233, VT8233A
0013 Datasheet: available on request from VIA
0014
0015 * VIA Technologies, Inc. VT8235, VT8237R, VT8237A, VT8237S, VT8251
0016 Datasheet: available on request and under NDA from VIA
0017
0018 * VIA Technologies, Inc. CX700
0019 Datasheet: available on request and under NDA from VIA
0020
0021 * VIA Technologies, Inc. VX800/VX820
0022 Datasheet: available on http://linux.via.com.tw
0023
0024 * VIA Technologies, Inc. VX855/VX875
0025 Datasheet: available on http://linux.via.com.tw
0026
0027 * VIA Technologies, Inc. VX900
0028 Datasheet: available on http://linux.via.com.tw
0029
0030 Authors:
0031 - Kyösti Mälkki <kmalkki@cc.hut.fi>,
0032 - Mark D. Studebaker <mdsxyz123@yahoo.com>,
0033 - Jean Delvare <jdelvare@suse.de>
0034
0035 Module Parameters
0036 -----------------
0037
0038 * force: int
0039 Forcibly enable the SMBus controller. DANGEROUS!
0040 * force_addr: int
0041 Forcibly enable the SMBus at the given address. EXTREMELY DANGEROUS!
0042
0043 Description
0044 -----------
0045
0046 i2c-viapro is a true SMBus host driver for motherboards with one of the
0047 supported VIA south bridges.
0048
0049 Your ``lspci -n`` listing must show one of these :
0050
0051 ================ ======================
0052 device 1106:3050 (VT82C596A function 3)
0053 device 1106:3051 (VT82C596B function 3)
0054 device 1106:3057 (VT82C686 function 4)
0055 device 1106:3074 (VT8233)
0056 device 1106:3147 (VT8233A)
0057 device 1106:8235 (VT8231 function 4)
0058 device 1106:3177 (VT8235)
0059 device 1106:3227 (VT8237R)
0060 device 1106:3337 (VT8237A)
0061 device 1106:3372 (VT8237S)
0062 device 1106:3287 (VT8251)
0063 device 1106:8324 (CX700)
0064 device 1106:8353 (VX800/VX820)
0065 device 1106:8409 (VX855/VX875)
0066 device 1106:8410 (VX900)
0067 ================ ======================
0068
0069 If none of these show up, you should look in the BIOS for settings like
0070 enable ACPI / SMBus or even USB.
0071
0072 Except for the oldest chips (VT82C596A/B, VT82C686A and most probably
0073 VT8231), this driver supports I2C block transactions. Such transactions
0074 are mainly useful to read from and write to EEPROMs.
0075
0076 The CX700/VX800/VX820 additionally appears to support SMBus PEC, although
0077 this driver doesn't implement it yet.
