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$FreeBSD: releng/10.2/share/man/man4/atp.4 263063 2014-03-12 07:15:41Z hselasky $
.Dd February 24, 2014 .Dt ATP 4 .Os .Sh NAME .Nm atp .Nd Apple touchpad driver .Sh SYNOPSIS To compile this driver into the kernel, place the following lines into your kernel configuration file: d -ragged -offset indent .Cd "device atp" .Cd "device usb" .Ed
p Alternatively, to load the driver as a module at boot time, place the following line in .Xr loader.conf 5 : d -literal -offset indent atp_load="YES" .Ed .Sh DESCRIPTION The .Nm 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.
p 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 click.
p There is support for 2-finger horizontal scrolling, which translates to page-back/forward events; vertical multi-finger scrolling emulates the mouse wheel.
p 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.
p .Nm supports dynamic reconfiguration using .Xr sysctl 8 ; through nodes under .Nm hw.usb.atp . Pointer sensitivity can be controlled using the sysctl tunable .Nm hw.usb.atp.scale_factor . Smaller values of .Fa scale_factor 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 .Nm hw.usb.atp.small_movement . . The maximum tolerable duration of a touch gesture is controlled by .Nm hw.usb.atp.touch_timeout (in microseconds); beyond this period, touches are considered to be slides. (This conversion also happens when a finger stroke accumulates at least .Nm hw.usb.atp.slide_min_movement movement (in mickeys). . The maximum time (in microseconds) to allow an association between a double- tap and drag gesture may be controlled by .Nm hw.usb.atp.double_tap_threshold . . Should one want to disable tap detection and rely only upon physical button presses, set the following sysctl to a value of 2 .Nm hw.usb.atp.tap_minimum . . .Sh HARDWARE The .Nm driver provides support for the following Product IDs:
p l -bullet -compact t PowerBooks, iBooks (IDs: 0x020e, 0x020f, 0x0210, 0x0214, 0x0215, 0x0216) t Core Duo MacBook & MacBook Pro (IDs: 0x0217, 0x0218, 0x0219) t Core2 Duo MacBook & MacBook Pro (IDs: 0x021a, 0x021b, 0x021c) t Core2 Duo MacBook3,1 (IDs: 0x0229, 0x022a, 0x022b) t 12 inch PowerBook and iBook (IDs: 0x030a, 0x030b) t 15 inch PowerBook (IDs: 0x020e, 0x020f, 0x0215) t 17 inch PowerBook (ID: 0x020d) t 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, 0x0292) .El
p To discover the product-id of a touchpad, search for 'Trackpad' in the output of .Xr lshal 1 and look up the property .Nm usb_device.product_id . .Sh FILES .Nm creates a blocking pseudo-device file,
a /dev/atp0 , which presents the mouse as a .Ar sysmouse or .Ar mousesystems type device--see .Xr moused 8 for an explanation of these mouse types. .Sh SEE ALSO .Xr sysmouse 4 , .Xr usb 4 , .Xr loader.conf 5 , .Xr xorg.conf 5 Pq Pa ports/x11/xorg , .Xr moused 8 , .Xr sysctl 8 .Sh AUTHORS .An -nosplit The .Nm driver was written by .An Rohit Grover Aq rgrover1@gmail.com .