Using managed resources simplifies error handling and shrinks
size of arc_ps2_remove().
Tested-by: NMischa Jonker <mischa.jonker@synopsys.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

This adds support for the PS/2 block that is used in various ARC FPGA
platforms.
Signed-off-by: NMischa Jonker <mischa.jonker@synopsys.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

This removes an open coded simple_open() function and
replaces file operations references to the function
with simple_open() instead.

dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

i8042_platform_init() skips reguest_region() on MIPS, but in
i8042_platform_exit() release_region() is still called. Fix this by
reserving the region also on MIPS.

The patch eliminates the following error message seen on MIPS:

[    2.112000] Trying to free nonexistent resource <0000000000000060-000000000000006f>
Signed-off-by: NAaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Add device tree bindings for mms114 touchscreen.

[Dmitry Torokhov: added #ifdef CONFIG_OF guards]
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Saves a small amount of code and reduces the potential for leaks.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Saves a little code and eliminates the possibility of introducing some
leaks.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

This is unneeded, only a bound driver can use driver data and a driver
relying on the state prior to probe() is buggy.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Convert the struct i2c_msg initialization to C99 format. This makes
maintaining and editing the code simpler. Also helps once other fields
like transferred are added in future.

Thanks to Julia Lawall <julia.lawall@lip6.fr> for automating the
conversion.
Signed-off-by: NShubhrajyoti D <shubhrajyoti@ti.com>
Acked-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Convert the struct i2c_msg initialization to C99 format. This makes
maintaining and editing the code simpler. Also helps once other fields
like transferred are added in future.

Thanks to Julia Lawall <julia.lawall@lip6.fr>  for automating the
conversion.
Signed-off-by: NShubhrajyoti D <shubhrajyoti@ti.com>
Acked-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Extend the amount of character devices, such as eventX, mouseX and jsX,
from a hard limit of 32 per input handler to about 1024 shared across
all handlers.

To be compatible with legacy installations input handlers will start
creating char devices with minors in their legacy range, however once
legacy range is exhausted they will start allocating minors from the
dynamic range 256-1024.
Reviewed-by: NDavid Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Seeking does not make sense for mousedev, so let's use nonseekable_open()
to mark its devices as non-seekable.
Reviewed-by: NDavid Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Do the rename to make the logic more clear and also change it to bool
while at it.
Reviewed-by: NDavid Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Reformat structure initializers to match the rest of input handlers
Reviewed-by: NDavid Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Reviewed-by: NDavid Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Add calls to clk_prepare and clk_unprepare as required by commom clock
framework.
Signed-off-by: NThomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Use %*ph format specifier to print small buffer.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Rewrites this function to be easier to read and understand. The new
function 'wacom_set_device_mode' now handles the grunt work of
assembling the proper feature report, sending it to the device,
and ensuring the setting "sticks".
Signed-off-by: NJason Gerecke <killertofu@gmail.com>
Tested-by: NPing Cheng <pingc@wacom.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

The Cintiq 24HD touch cannot use wacom_set_phy_from_res to determine
the physical size of the touch sensor since the pen and touch are
on separate USB devices. The physical size is, however, provided in
the HID descriptor, just scaled to a unit we don't use.

This patch introduces the function wacom_fix_phy_from_hid to let
us make use of the unit and exponent data provided by HID to set
the [xy]_phy variables to an appropriate value. This function
relies on a trimmed-down version of hidinput_calc_abs_res from
the hid-input.c.
Signed-off-by: NJason Gerecke <killertofu@gmail.com>
Tested-by: NPing Cheng <pingc@wacom.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

The ability to set the proximity flag should apply to any device
that has both pen and touch input. Rather than listing classes of
devices known to meet this criteria, simply filter on the quirk
defining all such devices.
Signed-off-by: NJason Gerecke <killertofu@gmail.com>
Tested-by: NPing Cheng <pingc@wacom.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

This changes how the touch packets for Intuos5 and 3rd-gen Bamboo
are interpreted, so that proper values for the MAJOR and MINOR
axes are reported. Instead of using the amplitude field (data[6]),
we use the size field (data[5]) and do some calculation to
transform it from a scaled-down area into axis lengths.

Note that even though we assume a circular contact, both MAJOR and
MINOR are reported since the resolution of the X and Y axes differ.
Signed-off-by: NJason Gerecke <killertofu@gmail.com>
Reviewed-by: NChris Bagwell <chris@cnpbagwell.com>
Acked-by: NPing Cheng <pingc@wacom.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Merge Henrik's updates to multitouch code. Even though Jiri already
pulled them in I need to do it too since my changes to evdev using
dynamic major would clash with them.

Use of the in-kernel tracking code to convert the driver to MT-B.

With ten fingers on the pad, the in-kernel tracking adds approximately
25 us to the maximum irqsoff latency. Under normal workloads, however,
the tracking has no measurable effect.
Tested-by: NBenjamin Tissoires <benjamin.tissoires@enac.fr>
Acked-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>

The logical scale is used to produce special finger width values to
userspace, but has become an unnecessary restriction for everything
else.  Also, the bcm5974 trackpads are very accurate and work well
without hysteresis.

This patch simplifies the driver and device data by removing the
logical scale, and by moving the special synaptics code out of the
main path.  Also add the orientation range, needed in a subsequent
patch, to the device configuration.
Tested-by: NBenjamin Tissoires <benjamin.tissoires@enac.fr>
Acked-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>

Rename touch properties to match established nomenclature, and define
the maximum number of fingers.
Tested-by: NBenjamin Tissoires <benjamin.tissoires@enac.fr>
Acked-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>

The early generations with this trackpad used the separate mouse
interface to produce button events. With the introduction of the
button pads, this information was moved to the trackpad interface,
leaving the mouse interface unused. The driver is still setting up
both interfaces, which has not caused any problems - until now.

It turns out that without the CONFIG_USB_EHCI_TT_NEWSCHED option, the
driver may return an ENOSPC upon bt_urb submission, resulting in a
failure to open the device. This happens everytime on the MacBookPro
Retina (and likely on other mid-2012 models), but earlier MacBook
models seem to work fine.

This patch skips the bt_urb setup for TYPE2 devices, which arguably
should have been done in the first place.
Tested-by: NBenjamin Tissoires <benjamin.tissoires@enac.fr>
Acked-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>

Add support for the Flatfrog Multitouch 3200 panel. This panel
advertises some fields that it does not use, hence the new quirk.

Cc: Pablo Cases <pablo.cases@flatfrog.com>
Acked-by: NJiri Kosina <jkosina@suse.cz>
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>

Some devices report the number of contacts via the unreliable
CONTACTCOUNT usage, rather than using the CONTACTMAX feature.
Without this patch, the 3M devices are constrained to the default
maximum of ten fingers.

Cc: Benjamin Tissoires <benjamin.tissoires@enac.fr>
Acked-by: NJiri Kosina <jkosina@suse.cz>
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>

With the input_mt_sync_frame() function in place, there is no longer
any need to keep the full touch state in the driver. This patch
removes the slot state and replaces the lookup code with the input-mt
equivalent.
Reviewed-and-tested-by: NBenjamin Tissoires <benjamin.tissoires@enac.fr>
Acked-by: NJiri Kosina <jkosina@suse.cz>
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>

With the input_configured() callback in place, the setup and frame
synchronization can be simplified. The input device initialization is
moved to mt_input_configured(), to make sure the full HID report has been
seen.
Reviewed-and-tested-by: NBenjamin Tissoires <benjamin.tissoires@enac.fr>
Acked-by: NJiri Kosina <jkosina@suse.cz>
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>

Some recent hardware define more than 128 fields in the report
descriptor. Increase the limit to 256. This adds another kilobyte of
memory per report.
Tested-by: NPing Cheng <pingc@wacom.com>
Acked-by: NJiri Kosina <jkosina@suse.cz>
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>

A hid device may create several input devices, and a driver may need
to prepare or finalize the configuration per input device. Currently,
there is no sane way for a driver to know when a device has been
configured. This patch adds a callback providing that information.
Reviewed-and-tested-by: NBenjamin Tissoires <benjamin.tissoires@enac.fr>
Tested-by: NPing Cheng <pingc@wacom.com>
Acked-by: NJiri Kosina <jkosina@suse.cz>
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>

Some drivers like to report ABS_PRESSURE in a special way.
Allow this when ABS_MT_PRESSURE is not defined.
Acked-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>

Some devices use an internal key for tracking which cannot be directly
mapped to slots. This patch provides a key-to-slot mapping, which can
be used by drivers of such devices.
Reviewed-and-tested-by: NBenjamin Tissoires <benjamin.tissoires@enac.fr>
Acked-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>

With the INPUT_MT_TRACK flag set, the function input_mt_assign_slots()
can be used to match a new set of contacts against the currently used
slots. The algorithm used is based on Lagrange relaxation, and performs
very well in practice; slower than mtdev for a few corner cases, but
faster in most commonly occuring cases.
Tested-by: NBenjamin Tissoires <benjamin.tissoires@enac.fr>
Acked-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>

Most MT drivers perform the same actions on frame synchronization.
Some actions, like dropping unseen contacts, are also unnecessarily
complex. Collect common frame synchronization tasks in a new function,
input_mt_sync_frame(). Depending on the flags set, it drops unseen
contacts and performs pointer emulation.

With init flags and frame synchronization in place, most MT drivers
can be simplified. First out are the bcm5974 and hid-multitouch
drivers, following this patch.
Reviewed-and-tested-by: NBenjamin Tissoires <benjamin.tissoires@enac.fr>
Tested-by: NPing Cheng <pingc@wacom.com>
Acked-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>

Preparing to move more repeated code into the mt core, add a flags
argument to the input_mt_slots_init() function.
Reviewed-and-tested-by: NBenjamin Tissoires <benjamin.tissoires@enac.fr>
Tested-by: NPing Cheng <pingc@wacom.com>
Acked-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>

By sending a full frame of events at the same time, the irqsoff
latency at heavy load is brought down from 200 us to 100 us.

Cc: Daniel Kurtz <djkurtz@chromium.org>
Tested-by: NBenjamin Tissoires <benjamin.tissoires@enac.fr>
Tested-by: NPing Cheng <pingc@wacom.com>
Acked-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>

On heavy event loads, such as a multitouch driver, the irqsoff latency
can be as high as 250 us.  By accumulating a frame worth of data
before passing it on, the latency can be dramatically reduced.  As a
side effect, the special EV_SYN handling can be removed, since the
frame is now atomic.

This patch adds the events() handler callback and uses it if it
exists. The latency is improved by 50 us even without the callback.

Cc: Daniel Kurtz <djkurtz@chromium.org>
Tested-by: NBenjamin Tissoires <benjamin.tissoires@enac.fr>
Tested-by: NPing Cheng <pingc@wacom.com>
Tested-by: NSedat Dilek <sedat.dilek@gmail.com>
Acked-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>

Preparing to split event filtering and event passing, move the
autorepeat function to the point where the event is actually passed.
Tested-by: NBenjamin Tissoires <benjamin.tissoires@enac.fr>
Tested-by: NPing Cheng <pingc@wacom.com>
Acked-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>