The touchpad on the Acer Aspire One D250 will report out of range values
in the extreme lower portion of the touchpad. These appear as abrupt
changes in the values reported by the hardware from very low values to
very high values, which can cause unexpected vertical jumps in the
position of the mouse pointer.

What seems to be happening is that the value is wrapping to a two's
compliment negative value of higher resolution than the 13-bit value
reported by the hardware, with the high-order bits being truncated. This
patch adds handling for these values by converting them to the
appropriate negative values.

The only tricky part about this is deciding when to treat a number as
negative. It stands to reason that if out of range values can be
reported on the low end then it could also happen on the high end, so
not all out of range values should be treated as negative. The approach
taken here is to split the difference between the maximum legitimate
value for the axis and the maximum possible value that the hardware can
report, treating values greater than this number as negative and all
other values as positive. This can be tweaked later if hardware is found
that operates outside of these parameters.

BugLink: http://bugs.launchpad.net/bugs/1001251
Cc: stable@vger.kernel.org
Signed-off-by: NSeth Forshee <seth.forshee@canonical.com>
Reviewed-by: NDaniel Kurtz <djkurtz@chromium.org>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Add support for the 15'' MacBook Pro Retina model (MacBookPro10,1).

Patch originally written by clipcarl (forums.opensuse.org).
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Read the Firmware ID and Board Number from a synaptics device at init
and display them in the system log.

Device behavior is very board and firmware dependent.
It may prove useful for users to include this information when providing
bug reports or other feedback.
Signed-off-by: NDaniel Kurtz <djkurtz@chromium.org>
Acked-by: NHenrik Rydberg <rydberg@euromail.se>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

The USB TrackPoint name string contains a space at the trailing end that
can cause confusion/difficulty when creating udev rules. Example:

 "Synaptics Inc. Composite TouchPad / TrackPoint (Stick) "

This patch removes the trailing space.
Signed-off-by: NBob Ross <pigiron@gmx.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Move synaptics_invert_y() inside CONFIG_MOUSE_PS2_SYNAPTICS to get rid of
a compile warning when we don't select synaptics support.

drivers/input/mouse/synaptics.c:53:12: warning: ‘synaptics_invert_y’ defined but not used [-Wunused-function]
Signed-off-by: NJJ Ding <dgdunix@gmail.com>
Reviewed-by: NDaniel Kurtz <djkurtz@chromium.org>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Instead of open-coded reporting number of fingers on the touchpad
let's use input_mt_report_finger_count() helper.
Acked-by: NSeth Forshee <seth.forshee@canonical.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

This patch adds semi-MT support for ALPS v4 protocol touchpads.
It is based on the work by Seth Forshee for ALPS v3 and v4 protocol
support. Three packets are required to assemble and process the MT
data. ST events are reported at once to avoid latency. If there
were two contacts or more, report MT data instead of ST events.

Thanks to Seth Forshee for providing most of the code, guidance
and insight for producing this patch.
Signed-off-by: NGeorge Pantalos <gpantalos@gmail.com>
Acked-by: NSeth Forshee <seth.forshee@canonical.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

This driver adds support for the Synaptics NavPoint touchpad connected
to a PXA27x SSP port in SPI slave mode. The device emulates a mouse;
a tap or tap-and-a-half drag gesture emulates the left mouse button.
For example, use the xf86-input-evdev driver for an X pointing device.
Signed-off-by: NPaul Parsons <lost.distance@yahoo.com>
Tested-by: NPhilipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Hardware since Cx supports an unique identity (used to identify OEM vendors
and released lot number) which is very helpful for diagnostic purpose.
This revision tries to make it as a part of driver boot up message.

Whilst here, also bumping fsp_drv_ver to acknowledge recent addition of
absolute coordinates output.
Signed-off-by: NTai-hwa Liang <avatar@sentelic.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

My last patch fixing up the dev_* messages caused a compiler warning
accidentally for an unused variable.  Fix this up, as it was my fault.

Cc: Alessandro Rubini <rubini@ipvvis.unipv.it>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Previously I had made the struct device point to the input device, but
after talking with Dmitry, he said that the USB device would make more
sense for this driver to point to.  So converted it to use that instead.

CC: Henrik Rydberg <rydberg@euromail.se>
CC: Alessandro Rubini <rubini@ipvvis.unipv.it>
CC: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Previously I had made the struct device point to the input device, but
after talking with Dmitry, he said that the USB device would make more
sense for this driver to point to.  So converted it to use that instead.

CC: Alessandro Rubini <rubini@ipvvis.unipv.it>
CC: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

dbg() was a very old USB-specific macro that should no longer
be used. This patch removes it from being used in the driver
and uses dev_dbg() instead.

CC: Henrik Rydberg <rydberg@euromail.se>
CC: Alessandro Rubini <rubini@ipvvis.unipv.it>
CC: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

dbg() was a very old USB-specific macro that should no longer
be used. This patch removes it from being used in the driver
and uses dev_dbg() instead.

CC: Alessandro Rubini <rubini@ipvvis.unipv.it>
CC: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

We should always reference the input device for dev_err(), not the USB
device.  Fix up the places where I got this wrong.
Reported-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
CC: Henrik Rydberg <rydberg@euromail.se>
CC: Alessandro Rubini <rubini@ipvvis.unipv.it>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

We should always reference the input device for dev_err(), not the USB
device.  Fix up the places where I got this wrong.
Reported-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
CC: Alessandro Rubini <rubini@ipvvis.unipv.it>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

err() was a very old USB-specific macro that I thought had
gone away.  This patch removes it from being used in the
driver and uses dev_err() instead.

CC: Henrik Rydberg <rydberg@euromail.se>
CC: Alessandro Rubini <rubini@ipvvis.unipv.it>
CC: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

err() was a very old USB-specific macro that I thought had
gone away.  This patch removes it from being used in the
driver and uses dev_err() instead.

CC: Alessandro Rubini <rubini@ipvvis.unipv.it>
CC: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 7968a5dd
Input: synaptics - add support for Relative mode

Accidentally broke support for advanced gestures (multitouch)
on some trackpads such as the one in my ThinkPad X220 by
incorretly changing the condition for enabling them. This
restores it.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
CC: stable@kernel.org [3.3]
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Direct usage of the asm include has long been deprecated by the
introduction of gpiolib.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Use psmouse_*() macros introduced in commit b5d21704.
Signed-off-by: NJJ Ding <dgdunix@gmail.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Add pointer and buttonpad properties for v4 hardware.

Also, Jachiet reported that on Asus UX31, right button has no effect.
It turns out v4 has only one button, the right-button effect is
implemented with software when Windows driver is installed, or in
firmware when touchpad is in relative mode. So remove BTN_RIGHT
while at it.
Reported-by: NJachiet Louis <louis@jachiet.com>
Signed-off-by: NJJ Ding <jj_ding@emc.com.tw>
Reviewed-by: NChase Douglas <chase.douglas@canonical.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Acer VH40 has a Fn key toggling the touchpad on and off, but it's
implemented in system firmware, and the EC chip has to receive
reset command to activate this function. Also when this machine
wakes up after resume, psmouse_reset is necessary to bring the
touchpad back on.
Signed-off-by: NJJ Ding <jj_ding@emc.com.tw>
Reviewed-by: NChase Douglas <chase.douglas@canonical.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

This patch converts the drivers in drivers/input/* to use
module_serio_driver() macro which makes the code smaller and
a bit simpler.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Taps in absolute positioning single-finger mode are currently reported
as physical clicks by the driver. This should be handled by userspace,
not the kernel.

When a tap occurs, the FSP_PB0_LBTN bit is set, but the FSP_PB0_PHY_BTN
is not. We use this to filter out physical clicks from taps.
Signed-off-by: NOskari Saarenmaa <os@ohmu.fi>
Reviewed-by: NTai-hwa Liang <avatar@sentelic.com>
Reviewed-by: NChase Douglas <chase.douglas@canonical.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Remove all #inclusions of asm/system.h preparatory to splitting and killing
it.  Performed with the following command:

perl -p -i -e 's!^#\s*include\s*<asm/system[.]h>.*\n!!' `grep -Irl '^#\s*include\s*<asm/system[.]h>' *`
Signed-off-by: NDavid Howells <dhowells@redhat.com>

Signed-off-by: NOskari Saarenmaa <os@ohmu.fi>
Signed-off-by: NTai-hwa Liang <avatar@sentelic.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Improve code readability by converting yet another magic number into a
pre-defined constant.
Signed-off-by: NTai-hwa Liang <avatar@sentelic.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

- Hooking multi-finger coordinates output with kernel multitouch library;
- Enabling absolute coordinates output for Cx+ hardware. The older hardware
  performs much better in relative mode; thus relative mode related code
  are preserved.

Part of the code is based on the work done by Oskari Saarenmaa <os@ohmu.fi>,
which was used to support the clickpad found on ASUS UX21/31 Ultrabook.
On the other hand, the FSP found on UX21/31 doesn't have hardware capability
register other than PnP ID, which means that we'll have to figure out an
alternative approach to identify such pad correctly; otherwise, blindly
adding INPUT_PROP_BUTTONPAD property may compatability issues amongst
existing FSPs.
Signed-off-by: NTai-hwa Liang <avatar@sentelic.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

- Move event bits setup code into a separate function,
  fsp_set_input_params(), so that we can perform hardware-specific settings
  in the future;
- Take hardware version information into account when activating
  protocol;
- Remove button information from boot message as it's somewhat confusing
  and is only for internal processing. While there, also move button
  retrieval code to be a part of protocol activation process.
Signed-off-by: NTai-hwa Liang <avatar@sentelic.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

This patch converts the drivers in drivers/input/* to use the
module_i2c_driver() macro which makes the code smaller and a bit
simpler.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Make use of psmouse_activate() and psmouse_deactivate() from psmouse-base.c
Signed-off-by: NAndres Salomon <dilinger@queued.net>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Other drivers duplicate this code; no sense in having it be private
to psmouse-base.
Signed-off-by: NAndres Salomon <dilinger@queued.net>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

ALPS touchpad detection fails if some buttons of ALPS are pressed.
The reason is that the "E6" query response byte is different from
what is expected.

This was tested on a Toshiba Portege R500.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: NAkio Idehara <zbe64533@gmail.com>
Tested-by: NSeth Forshee <seth.forshee@canonical.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

To simplify detection as a touchpad, inform userspace of the physical
properties of the device.
Signed-off-by: NChase Douglas <chase.douglas@canonical.com>
[rydberg@euromail.se: conflict resolution]
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>

This patch adds a driver for Synaptics USB touchpad or pointing stick
devices. These USB devices emulate an USB mouse by default, so one can
also use the usbhid driver. However, in combination with special user
space drivers this kernel driver allows one to customize the behaviour
of the device.

An extended version of this driver with support for the cPad background
display can be found at
<http://jan-steinhoff.de/linux/synaptics-usb.html>.
Signed-off-by: NJan Steinhoff <mail@jan-steinhoff.de>
Acked-by: NJiri Kosina <jkosina@suse.cz>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

module_param(bool) used to counter-intuitively take an int.  In
fddd5201 (mid-2009) we allowed bool or int/unsigned int using a messy
trick.

It's time to remove the int/unsigned int option.  For this version
it'll simply give a warning, but it'll break next kernel version.
Acked-by: NMauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>

Some bcm5974 trackpads have a physical button beneath the physical surface.
This patch sets the property bit so user space applications can detect the
trackpad type and act accordingly.
Signed-off-by: NJussi Pakkanen <jussi.pakkanen@canonical.com>
Reviewed-by: NHenrik Rydberg <rydberg@euromail.se>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Recent conversion to module_platform_driver() went a bit too far and
converted not only drivers that used platform_driver_register() but
also ones using platform_driver_probe(), breaking them in process.
Reported-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>