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70 lines
2.3 KiB
70 lines
2.3 KiB
.. include:: <isonum.txt> |
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BCM5974 Driver (bcm5974) |
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:Copyright: |copy| 2008-2009 Henrik Rydberg <[email protected]> |
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The USB initialization and package decoding was made by Scott Shawcroft as |
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part of the touchd user-space driver project: |
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:Copyright: |copy| 2008 Scott Shawcroft ([email protected]) |
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The BCM5974 driver is based on the appletouch driver: |
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:Copyright: |copy| 2001-2004 Greg Kroah-Hartman ([email protected]) |
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:Copyright: |copy| 2005 Johannes Berg ([email protected]) |
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:Copyright: |copy| 2005 Stelian Pop ([email protected]) |
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:Copyright: |copy| 2005 Frank Arnold ([email protected]) |
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:Copyright: |copy| 2005 Peter Osterlund ([email protected]) |
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:Copyright: |copy| 2005 Michael Hanselmann ([email protected]) |
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:Copyright: |copy| 2006 Nicolas Boichat ([email protected]) |
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This driver adds support for the multi-touch trackpad on the new Apple |
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Macbook Air and Macbook Pro laptops. It replaces the appletouch driver on |
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those computers, and integrates well with the synaptics driver of the Xorg |
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system. |
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Known to work on Macbook Air, Macbook Pro Penryn and the new unibody |
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Macbook 5 and Macbook Pro 5. |
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Usage |
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----- |
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The driver loads automatically for the supported usb device ids, and |
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becomes available both as an event device (/dev/input/event*) and as a |
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mouse via the mousedev driver (/dev/input/mice). |
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USB Race |
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-------- |
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The Apple multi-touch trackpads report both mouse and keyboard events via |
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different interfaces of the same usb device. This creates a race condition |
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with the HID driver, which, if not told otherwise, will find the standard |
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HID mouse and keyboard, and claim the whole device. To remedy, the usb |
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product id must be listed in the mouse_ignore list of the hid driver. |
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Debug output |
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------------ |
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To ease the development for new hardware version, verbose packet output can |
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be switched on with the debug kernel module parameter. The range [1-9] |
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yields different levels of verbosity. Example (as root):: |
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echo -n 9 > /sys/module/bcm5974/parameters/debug |
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tail -f /var/log/debug |
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echo -n 0 > /sys/module/bcm5974/parameters/debug |
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Trivia |
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------ |
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The driver was developed at the ubuntu forums in June 2008 [#f1]_, and now has |
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a more permanent home at bitmath.org [#f2]_. |
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.. Links |
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.. [#f1] http://ubuntuforums.org/showthread.php?t=840040 |
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.. [#f2] http://bitmath.org/code/
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