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authorJean Delvare <khali@linux-fr.org>2009-12-06 17:06:21 +0100
committerJean Delvare <khali@linux-fr.org>2009-12-06 17:06:21 +0100
commita0c11cdd6a1975fd8d6d186f2e2865a82f3e9bbf (patch)
tree03d3ea5c1f48a99841587c27c52a31cda8f70b99 /Documentation/i2c
parentbc6286e50b4a34d8af52132d6e22f85c6c8853a7 (diff)
downloadop-kernel-dev-a0c11cdd6a1975fd8d6d186f2e2865a82f3e9bbf.zip
op-kernel-dev-a0c11cdd6a1975fd8d6d186f2e2865a82f3e9bbf.tar.gz
i2c-voodoo3: Delete
Superseded by tdfxfb. I2C/DDC support used to live in a separate driver but this caused driver conflicts. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Krzysztof Helt <krzysztof.h1@wp.pl>
Diffstat (limited to 'Documentation/i2c')
-rw-r--r--Documentation/i2c/busses/i2c-voodoo362
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diff --git a/Documentation/i2c/busses/i2c-voodoo3 b/Documentation/i2c/busses/i2c-voodoo3
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--- a/Documentation/i2c/busses/i2c-voodoo3
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-Kernel driver i2c-voodoo3
-
-Supported adapters:
- * 3dfx Voodoo3 based cards
- * Voodoo Banshee based cards
-
-Authors:
- Frodo Looijaard <frodol@dds.nl>,
- Philip Edelbrock <phil@netroedge.com>,
- Ralph Metzler <rjkm@thp.uni-koeln.de>,
- Mark D. Studebaker <mdsxyz123@yahoo.com>
-
-Main contact: Philip Edelbrock <phil@netroedge.com>
-
-The code is based upon Ralph's test code (he did the hard stuff ;')
-
-Description
------------
-
-The 3dfx Voodoo3 chip contains two I2C interfaces (aka a I2C 'master' or
-'host').
-
-The first interface is used for DDC (Data Display Channel) which is a
-serial channel through the VGA monitor connector to a DDC-compliant
-monitor. This interface is defined by the Video Electronics Standards
-Association (VESA). The standards are available for purchase at
-http://www.vesa.org .
-
-The second interface is a general-purpose I2C bus. The intent by 3dfx was
-to allow manufacturers to add extra chips to the video card such as a
-TV-out chip such as the BT869 or possibly even I2C based temperature
-sensors like the ADM1021 or LM75.
-
-Stability
----------
-
-Seems to be stable on the test machine, but needs more testing on other
-machines. Simultaneous accesses of the DDC and I2C busses may cause errors.
-
-Supported Devices
------------------
-
-Specifically, this driver was written and tested on the '3dfx Voodoo3 AGP
-3000' which has a tv-out feature (s-video or composite). According to the
-docs and discussions, this code should work for any Voodoo3 based cards as
-well as Voodoo Banshee based cards. The DDC interface has been tested on a
-Voodoo Banshee card.
-
-Issues
-------
-
-Probably many, but it seems to work OK on my system. :')
-
-
-External Device Connection
---------------------------
-
-The digital video input jumpers give availability to the I2C bus.
-Specifically, pins 13 and 25 (bottom row middle, and bottom right-end) are
-the I2C clock and I2C data lines, respectively. +5V and GND are probably
-also easily available making the addition of extra I2C/SMBus devices easy
-to implement.
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