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30 .Nd Cypress APA trackpad with I2C interface driver
32 To compile this driver into the kernel, place the following lines into
33 the kernel configuration file:
34 .Bd -ragged -offset indent
40 Alternatively, to load the driver as a module at boot time, place the following line in
42 .Bd -literal -offset indent
47 On many Chromebook models this driver can be automatically configured with the
49 .Xr chromebook_platform 4
53 driver can be manually configured in
54 .Pa /boot/device.hints :
55 .Cd hint.cyapa.0.at="iicbus0"
56 .Cd hint.cyapa.0.addr="0xCE"
57 .Cd hint.cyapa.1.at="iicbus1"
58 .Cd hint.cyapa.1.addr="0xCE"
62 driver provides support for the Cypress APA trackpad.
63 It emulates the IntelliMouse PS/2 protocol.
64 It supports basic mouse ioctls, so that
66 is supported properly.
70 +--------------------+------------+
74 | Button +------------+
77 +--------------------+............|
78 | Thumb/Button Area | 15%
79 +---------------------------------+
83 .It Va Two finger scrolling
84 Use two fingers for Z axis scrolling.
85 .It Va Button down/second finger
86 While one finger clicks and holds down the touchpad, the second finger can be
87 used to move the mouse cursor.
88 This can be useful for drawing or selecting text.
89 .It Va Thumb/Button area
90 The lower 15% of the trackpad will not affect the mouse cursor position.
91 This allows for high precision clicking, by controlling the cursor with the
92 index finger and pushing/holding the pad down with the thumb.
93 .It Va Trackpad button
95 The left two thirds of the pad issues a LEFT button event.
96 The upper right corner issues a MIDDLE button event.
97 The lower right corner issues a RIGHT button.
98 Optionally, tap to click can be enabled (see below).
103 these values are configurable for
105 .Bl -tag -width "hint.cyapa.%d.addr"
106 .It Va hint.cyapa.%d.at
109 .It Va hint.cyapa.%d.addr
117 variables are available:
119 .It Va debug.cyapa_idle_freq
120 Scan frequency in idle mode, the default is 1.
121 .It Va debug.cyapa_slow_freq
122 Scan frequency in slow mode, the default is 20.
123 .It Va debug.cyapa_norm_freq
124 Scan frequency in normal mode, the default is 100.
125 .It Va debug.cyapa_minpressure
126 Minimum pressure to detect a finger, the default is 12.
127 .It Va debug.cyapa_enable_tapclick
128 Controls tap to click.
132 Tap to click is disabled.
133 This is the default value.
135 Tap to click always generates a left mouse button event.
137 Tap to click generates left mouse button event if the left 2/3rds of the pad
138 are tapped and a right mouse button event otherwise.
140 Tap to click generates mouse button events as if the physical button was
145 .It Va debug.cyapa_tapclick_min_ticks
146 Minimum tap duration in ticks to create a click, the default is 1.
147 .It Va debug.cyapa_tapclick_max_ticks
148 Maximum tap duration in ticks to create a click, the default is 8.
149 .It Va debug.cyapa_move_min_ticks
150 Minimum ticks before cursor movement occurs, the default is 4.
151 .It Va debug.cyapa_scroll_wait_ticks
152 Ticks to wait before starting to scroll, the default is 0.
153 .It Va debug.cyapa_scroll_stick_ticks
154 Ticks while preventing cursor movement on single finger after scroll,
156 .It Va debug.cyapa_thumbarea_percent
157 Size of bottom thumb area in percent, the default is 15.
158 .It Va debug.cyapa_debug
159 Setting this to a non-zero value enables debug output to console and syslog,
161 .It Va debug.cyapa_reset
162 Setting this to a non-zero value reinitializes the device.
163 The sysctl resets to zero immediately.
169 which presents the mouse as an
170 .Ar IntelliMouse PS/2
174 levels 0 through 2, level 1 is used by default.
180 add the following lines to the
184 .Dl moused_enable="YES"
185 .Dl moused_port="/dev/cyapa0"
187 If vertical scrolling is not desired, add
189 .Dl moused_flags="-l0"
194 Enable tap to click for the left and the right mouse button and
195 disable the thumb area by adding these lines to the
199 .Dl debug.cyapa_thumbarea_percent=0
200 .Dl debug.cyapa_enable_tapclick=2
202 .Xr chromebook_platform 4 ,
211 driver was written for
216 It has been ported, modified, and enhanced for
219 .An Michael Gmelin Aq Mt freebsd@grem.de .
221 This manual page was written by
222 .An Michael Gmelin Aq Mt freebsd@grem.de .
226 driver detects the device from the I2C address.
227 This might have unforeseen consequences if the initialization sequence
228 is sent to an unknown device at that address.