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author | Stelian Pop <stelian@popies.net> | 2005-09-08 10:19:48 +0200 |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2005-09-12 12:23:39 -0700 |
commit | f7214ff4e8248513ec626212b2c1a3ca0b2a0888 (patch) | |
tree | ac9cc182c236857a4c7d2ef4c84b884f84d4f84f /Documentation/input | |
parent | 1bbb4f2035d94d86e52e9b5341c142dcb39bb879 (diff) | |
download | kernel_samsung_tuna-f7214ff4e8248513ec626212b2c1a3ca0b2a0888.zip kernel_samsung_tuna-f7214ff4e8248513ec626212b2c1a3ca0b2a0888.tar.gz kernel_samsung_tuna-f7214ff4e8248513ec626212b2c1a3ca0b2a0888.tar.bz2 |
[PATCH] USB: add apple usb touchpad driver
This is a driver for the USB touchpad which can be found on post-February 2005
Apple PowerBooks.
This driver is derived from Johannes Berg's appletrackpad driver [1],
but it has been improved in some areas:
* appletouch is a full kernel driver, no userspace program is necessary
* appletouch can be interfaced with the synaptics X11 driver[2], in order
to have touchpad acceleration, scrolling, two/three finger tap, etc.
This driver has been tested by the readers of the 'debian-powerpc' mailing
list for a few weeks now and I believe it is now ready for inclusion into the
mainline kernel.
Credits go to Johannes Berg for reverse-engineering the touchpad protocol,
Frank Arnold for further improvements, and Alex Harper for some additional
information about the inner workings of the touchpad sensors.
Signed-off-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation/input')
-rw-r--r-- | Documentation/input/appletouch.txt | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/Documentation/input/appletouch.txt b/Documentation/input/appletouch.txt new file mode 100644 index 0000000..b48d11d --- /dev/null +++ b/Documentation/input/appletouch.txt @@ -0,0 +1,84 @@ +Apple Touchpad Driver (appletouch) +---------------------------------- + Copyright (C) 2005 Stelian Pop <stelian@popies.net> + +appletouch is a Linux kernel driver for the USB touchpad found on post +February 2005 Apple Alu Powerbooks. + +This driver is derived from Johannes Berg's appletrackpad driver[1], but it has +been improved in some areas: + * appletouch is a full kernel driver, no userspace program is necessary + * appletouch can be interfaced with the synaptics X11 driver, in order + to have touchpad acceleration, scrolling, etc. + +Credits go to Johannes Berg for reverse-engineering the touchpad protocol, +Frank Arnold for further improvements, and Alex Harper for some additional +information about the inner workings of the touchpad sensors. + +Usage: +------ + +In order to use the touchpad in the basic mode, compile the driver and load +the module. A new input device will be detected and you will be able to read +the mouse data from /dev/input/mice (using gpm, or X11). + +In X11, you can configure the touchpad to use the synaptics X11 driver, which +will give additional functionalities, like acceleration, scrolling, 2 finger +tap for middle button mouse emulation, 3 finger tap for right button mouse +emulation, etc. In order to do this, make sure you're using a recent version of +the synaptics driver (tested with 0.14.2, available from [2]), and configure a +new input device in your X11 configuration file (take a look below for an +example). For additional configuration, see the synaptics driver documentation. + + Section "InputDevice" + Identifier "Synaptics Touchpad" + Driver "synaptics" + Option "SendCoreEvents" "true" + Option "Device" "/dev/input/mice" + Option "Protocol" "auto-dev" + Option "LeftEdge" "0" + Option "RightEdge" "850" + Option "TopEdge" "0" + Option "BottomEdge" "645" + Option "MinSpeed" "0.4" + Option "MaxSpeed" "1" + Option "AccelFactor" "0.02" + Option "FingerLow" "0" + Option "FingerHigh" "30" + Option "MaxTapMove" "20" + Option "MaxTapTime" "100" + Option "HorizScrollDelta" "0" + Option "VertScrollDelta" "30" + Option "SHMConfig" "on" + EndSection + + Section "ServerLayout" + ... + InputDevice "Mouse" + InputDevice "Synaptics Touchpad" + ... + EndSection + +Fuzz problems: +-------------- + +The touchpad sensors are very sensitive to heat, and will generate a lot of +noise when the temperature changes. This is especially true when you power-on +the laptop for the first time. + +The appletouch driver tries to handle this noise and auto adapt itself, but it +is not perfect. If finger movements are not recognized anymore, try reloading +the driver. + +You can activate debugging using the 'debug' module parameter. A value of 0 +deactivates any debugging, 1 activates tracing of invalid samples, 2 activates +full tracing (each sample is being traced): + modprobe appletouch debug=1 + or + echo "1" > /sys/module/appletouch/parameters/debug + +Links: +------ + +[1]: http://johannes.sipsolutions.net/PowerBook/touchpad/ +[2]: http://web.telia.com/~u89404340/touchpad/index.html |