Manual Reference Pages - ATP (4)
- Apple touchpad driver
To compile this driver into the kernel, place the following lines into
your kernel configuration file:
.Cd device atp
.Cd device usb
Alternatively, to load the driver as a module at boot time, place the following line in
driver provides support for the Apple Internal Trackpad device found in many
Apple laptops. Older (Fountain/Geyser) and the newer (Wellspring) trackpad
families are all supported through a unified driver.
The driver simulates a three-button mouse using multi-finger tap detection.
Single finger tap generates a left-button click; two-finger tap maps to the
middle button; whereas a three-finger tap gets treated as a right button
There is support for 2-finger horizontal scrolling, which translates to
page-back/forward events; vertical multi-finger scrolling emulates the mouse
A double-tap followed by a drag is treated as a selection gesture; a
virtual left-button click is assumed for the lifespan of the drag.
supports dynamic reconfiguration using
through nodes under
Pointer sensitivity can be controlled using the sysctl tunable
Smaller values of
result in faster movement.
A simple high-pass filter is used to reduce contributions
from small movements; the threshold for this filter may be controlled by
The maximum tolerable duration of a touch gesture is controlled by
(in microseconds); beyond this period, touches are considered to be slides.
(This conversion also happens when a finger stroke accumulates at least
movement (in mickeys).
The maximum time (in microseconds) to allow an association between a double-
tap and drag gesture may be controlled by
Should one want to disable tap detection and rely only upon physical button
presses, set the following sysctl to a value of 2
driver provides support for the following Product IDs:
- PowerBooks, iBooks (IDs: 0x020e, 0x020f, 0x0210, 0x0214, 0x0215, 0x0216)
- Core Duo MacBook & MacBook Pro (IDs: 0x0217, 0x0218, 0x0219)
- Core2 Duo MacBook & MacBook Pro (IDs: 0x021a, 0x021b, 0x021c)
- Core2 Duo MacBook3,1 (IDs: 0x0229, 0x022a, 0x022b)
- 12 inch PowerBook and iBook (IDs: 0x030a, 0x030b)
- 15 inch PowerBook (IDs: 0x020e, 0x020f, 0x0215)
- 17 inch PowerBook (ID: 0x020d)
- Almost all recent Macbook-Pros and Airs (IDs: 0x0223, 0x0223, 0x0224, 0x0224,
0x0225, 0x0225, 0x0230, 0x0230, 0x0231, 0x0231, 0x0232, 0x0232, 0x0236,
0x0236, 0x0237, 0x0237, 0x0238, 0x0238, 0x023f, 0x023f, 0x0240, 0x0241,
0x0242, 0x0243, 0x0244, 0x0245, 0x0246, 0x0247, 0x0249, 0x024a, 0x024b,
0x024c, 0x024d, 0x024e, 0x0252, 0x0252, 0x0253, 0x0253, 0x0254, 0x0254,
0x0259, 0x025a, 0x025b, 0x0262, 0x0262, 0x0263, 0x0264, 0x0290, 0x0291,
To discover the product-id of a touchpad, search for Trackpad in the
and look up the property
creates a blocking pseudo-device file,
which presents the mouse as a
for an explanation of these mouse
driver was written by
.An Rohit Grover Aq email@example.com .
Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.