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1 | Kernel driver i2c-i810 | ||
2 | |||
3 | Supported adapters: | ||
4 | * Intel 82810, 82810-DC100, 82810E, and 82815 (GMCH) | ||
5 | * Intel 82845G (GMCH) | ||
6 | |||
7 | Authors: | ||
8 | Frodo Looijaard <frodol@dds.nl>, | ||
9 | Philip Edelbrock <phil@netroedge.com>, | ||
10 | Kyösti Mälkki <kmalkki@cc.hut.fi>, | ||
11 | Ralph Metzler <rjkm@thp.uni-koeln.de>, | ||
12 | Mark D. Studebaker <mdsxyz123@yahoo.com> | ||
13 | |||
14 | Main contact: Mark Studebaker <mdsxyz123@yahoo.com> | ||
15 | |||
16 | Description | ||
17 | ----------- | ||
18 | |||
19 | WARNING: If you have an '810' or '815' motherboard, your standard I2C | ||
20 | temperature sensors are most likely on the 801's I2C bus. You want the | ||
21 | i2c-i801 driver for those, not this driver. | ||
22 | |||
23 | Now for the i2c-i810... | ||
24 | |||
25 | The GMCH chip contains two I2C interfaces. | ||
26 | |||
27 | The first interface is used for DDC (Data Display Channel) which is a | ||
28 | serial channel through the VGA monitor connector to a DDC-compliant | ||
29 | monitor. This interface is defined by the Video Electronics Standards | ||
30 | Association (VESA). The standards are available for purchase at | ||
31 | http://www.vesa.org . | ||
32 | |||
33 | The second interface is a general-purpose I2C bus. It may be connected to a | ||
34 | TV-out chip such as the BT869 or possibly to a digital flat-panel display. | ||
35 | |||
36 | Features | ||
37 | -------- | ||
38 | |||
39 | Both busses use the i2c-algo-bit driver for 'bit banging' | ||
40 | and support for specific transactions is provided by i2c-algo-bit. | ||
41 | |||
42 | Issues | ||
43 | ------ | ||
44 | |||
45 | If you enable bus testing in i2c-algo-bit (insmod i2c-algo-bit bit_test=1), | ||
46 | the test may fail; if so, the i2c-i810 driver won't be inserted. However, | ||
47 | we think this has been fixed. | ||