| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | Kernel driver i2c-i810 |
| 2 | |
| 3 | Supported adapters: |
| 4 | * Intel 82810, 82810-DC100, 82810E, and 82815 (GMCH) |
| 5 | |
| 6 | Authors: |
| 7 | Frodo Looijaard <frodol@dds.nl>, |
| 8 | Philip Edelbrock <phil@netroedge.com>, |
| 9 | Kyösti Mälkki <kmalkki@cc.hut.fi>, |
| 10 | Ralph Metzler <rjkm@thp.uni-koeln.de>, |
| 11 | Mark D. Studebaker <mdsxyz123@yahoo.com> |
| 12 | |
| 13 | Main contact: Mark Studebaker <mdsxyz123@yahoo.com> |
| 14 | |
| 15 | Description |
| 16 | ----------- |
| 17 | |
| 18 | WARNING: If you have an '810' or '815' motherboard, your standard I2C |
| 19 | temperature sensors are most likely on the 801's I2C bus. You want the |
| 20 | i2c-i801 driver for those, not this driver. |
| 21 | |
| 22 | Now for the i2c-i810... |
| 23 | |
| 24 | The GMCH chip contains two I2C interfaces. |
| 25 | |
| 26 | The first interface is used for DDC (Data Display Channel) which is a |
| 27 | serial channel through the VGA monitor connector to a DDC-compliant |
| 28 | monitor. This interface is defined by the Video Electronics Standards |
| 29 | Association (VESA). The standards are available for purchase at |
| 30 | http://www.vesa.org . |
| 31 | |
| 32 | The second interface is a general-purpose I2C bus. It may be connected to a |
| 33 | TV-out chip such as the BT869 or possibly to a digital flat-panel display. |
| 34 | |
| 35 | Features |
| 36 | -------- |
| 37 | |
| 38 | Both busses use the i2c-algo-bit driver for 'bit banging' |
| 39 | and support for specific transactions is provided by i2c-algo-bit. |
| 40 | |
| 41 | Issues |
| 42 | ------ |
| 43 | |
| 44 | If you enable bus testing in i2c-algo-bit (insmod i2c-algo-bit bit_test=1), |
| 45 | the test may fail; if so, the i2c-i810 driver won't be inserted. However, |
| 46 | we think this has been fixed. |