The magic trackpad and mouse both report touch orientation in opposite
direction to the bcm5974 driver and what is written in
Documents/input/multi-touch-protocol.txt. This patch reverts the
direction, so that all in-kernel devices with this feature behave the
same way.

Since no known application has been utilizing this information yet, it
seems appropriate also for stable.

Cc: stable@kernel.org
Cc: Michael Poole <mdpoole@troilus.org>
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>
Acked-by: NChase Douglas <chase.douglas@canonical.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

Neaten current uses of dev_<level> by adding and using
hid specific hid_<level> macros.

Convert existing uses of dev_<level> uses to hid_<level>.
Convert hid-pidff printk uses to hid_<level>.

Remove err_hid and use hid_err instead.

Add missing newlines to logging messages where necessary.
Coalesce format strings.

Add and use pr_fmt(fmt) KBUILD_MODNAME ": " fmt

Other miscellaneous changes:

Add const struct hid_device * argument to hid-core functions
extract() and implement() so hid_<level> can be used by them.
Fix bad indentation in hid-core hid_input_field function
that calls extract() function above.
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

With the recent switch to having the hid layer handle standard axis
initialization, the Magic Trackpad now reports relative axes. This would
be fine in the normal mode, but the driver puts the device in multitouch
mode where no relative events are generated. Also, userspace software
depends on accurate axis information for device type detection. Thus,
ignoring the relative axes from the Magic Trackpad is best.
Signed-off-by: NChase Douglas <chase.douglas@canonical.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

By visual inspection, the reported touch_major and touch_minor axes
are roughly a factor of four too small. The factor is approximate,
since the protocol is not known and the HID report encodes touch size
with fewer bits than positions. This patch scales the reported values
by a factor of four.
Signed-off-by: NHenrik Rydberg <rydberg@euromail.se>
Signed-off-by: NChase Douglas <chase.douglas@canonical.com>
Acked-by: NMichael Poole <mdpoole@troilus.org>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

Let the HID core handle input device setup and HID-compliant reports.
This driver then only has to worry about the non-standard reports.
Signed-off-by: NMichael Poole <mdpoole@troilus.org>
Acked-by: NChase Douglas <chase.douglas@canonical.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

The trackpad speaks a similar, but different, protocol from the magic
mouse. However, only small code tweaks here and there are needed to make
basic multitouch work.

Extra logic is required for single-touch emulation of the touchpad. The
changes made here take the approach that only one finger may emulate the
single pointer when multiple fingers have touched the screen. Once that
finger is raised, all touches must be raised before any further single
touch events can be sent.

Sometimes the magic trackpad sends two distinct touch reports as one big
report. Simply splitting the packet in two and resending them through
magicmouse_raw_event ensures they are handled properly.

I also added myself to the copyright statement.
Signed-off-by: NChase Douglas <chase.douglas@canonical.com>
Acked-by: NMichael Poole <mdpoole@troilus.org>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

The new format should be easier to read to determine which bits
correspond to which data. It also brings all the manipulation logic to
the top of the function. This makes size and orientation reading more
clear.

Note that the impetus for this change is the forthcoming support for the
Magic Trackpad, which has a different touch data protocol.
Signed-off-by: NChase Douglas <chase.douglas@canonical.com>
Acked-by: NMichael Poole <mdpoole@troilus.org>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

Only the first feature request is required to put the Magic Mouse into
multitouch mode. This is also the case for the Magic Trackpad, for which
support will be added in a later commit.
Signed-off-by: NChase Douglas <chase.douglas@canonical.com>
Acked-by: NMichael Poole <mdpoole@troilus.org>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

The timestamps from the device are currently stored in the private data
structure. These aren't used, so remove them. I've left a comment
detailing the protocol for future reference.
Signed-off-by: NChase Douglas <chase.douglas@canonical.com>
Acked-by: NMichael Poole <mdpoole@troilus.org>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

For the MT protocol, we need to properly keep track of each down touch.
This change simplifies the logic, and should make things easier when
support for the Magic Trackpad is added.
Signed-off-by: NChase Douglas <chase.douglas@canonical.com>
Acked-by: NMichael Poole <mdpoole@troilus.org>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

The X and Y values have two more significant bits in the same byte
that contains click status.  Include these in the reported value.
Thanks to Iain Hibbert of NetBSD for pointing this out.
Signed-off-by: NMichael Poole <mdpoole@troilus.org>
Acked-by: NChase Douglas <chase.douglas@canonical.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

The evdev multitouch protocol requires that a last MT sync event must be
sent after all touches are up. This change adds the last MT sync event
to the hid-magicmouse driver.

Also, don't send events when a touch leaves.
Signed-off-by: NChase Douglas <chase.douglas@canonical.com>
Acked-by: NMichael Poole <mdpoole@troilus.org>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

Mimicks OS X behavior.
Signed-off-by: NChase Douglas <chase.douglas@canonical.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

The new scroll_speed param takes an integer value from 0 to 63, where 0
is slowest and 63 is fastest. The default of 32 remains the same. This
parameter also affects scroll acceleration linearly.

A second part of this change is a tightly coupled modification to the
scroll acceleration. Previously, scroll acceleration could be reset
without lifting the scroll finger. This is rather unintuitive and hard
to control in the case where a user wants faster scrolling, but wants to
hold the scroll touch for longer than a moment.

Note that scroll acceleration levels are now 1-7, where 7 is slowest. In
the previous implementation, there were 8 levels defined, but it was
impossible to start at the slowest level. In order to keep the default
scroll speed unchanged, only 7 levels are used now.
Signed-off-by: NChase Douglas <chase.douglas@canonical.com>
Acked-by: NMichael Poole <mdpoole@troilus.org>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

Before this change, sequential scroll events would take a variable
amount of movement due to incorrect accounting. This change ensures all
scroll movements require a deterministic touch movement for an action to
occur.
Signed-off-by: NChase Douglas <chase.douglas@canonical.com>
Acked-by: NMichael Poole <mdpoole@troilus.org>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

Scroll acceleration is unique to the magicmouse driver, and is
unintuitive to a user who is unaware of the functionality. Thus, disable
it by default, but add a module parameter to enable it for power users
who want it.
Signed-off-by: NChase Douglas <chase.douglas@canonical.com>
Acked-by: NMichael Poole <mdpoole@troilus.org>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

Previously, scroll events only occurred when the user moved a touch
along the middle of the touch surface. This is unintuitive for a normal
user who is not aware of this. The device has a uniform surface, so the
distinction is artificial. This change removes the touch area check for
a scroll event, which replicates the OS X behavior.
Signed-off-by: NChase Douglas <chase.douglas@canonical.com>
Acked-by: NMichael Poole <mdpoole@troilus.org>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

When HIDRAW is not set, hid_hw_start() returns ENODEV as no subsystem has
claimed the magicmouse device, and probe routine bails out. Which is not what we want.

This happens because magicmouse driver is instantiating the connection to
Input subsystem itself, and since commit 28918c21 ("HID: magicmouse: fix
oops after device removal") the HID core is not registering input device
itself.

Fix this by letting HID core register the input device (so that hid_hw_start()
succeeds, as the device is claimed by at least one subsystem) and de-register
it again later before proceeding with proper input setup.
Reported-by: NJustin P. Mattock <justinmattock@gmail.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: NTejun Heo <tj@kernel.org>
Guess-its-ok-by: NChristoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>

Ask the HID core not to register an input device for the mouse.
Fix an oops after removing the device, due to leaving the new
input device registered.
Signed-off-by: NMichael Poole <mdpoole@troilus.org>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

Use proper values to initialize bool configuration variables, tabs rather than
spaces, no braces for one-line else clause, __set_bit() when the operation
doesn't have to be atomic, input_set_abs_params() rather than writing the
fields directly, and call hid_hw_stop() when appropriate to handle failures in
the probe.
Signed-off-by: NMichael Poole <mdpoole@troilus.org>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

The Magic Mouse requires that a driver send an unlock Report(Feature) command,
similar to the Wacom wireless tablet and Sixaxis controller quirks.  This turns
on an Input Report that isn't published in the input Report descriptor that
contains touch data (and usually overrides the normal motion and click Report).

Because the mouse has only one switch and no scroll wheel, the driver
(under control of parameters) emulates a middle button and scroll wheel.
User space could also ignore and/or re-synthesize those events based on
the reported events.

Some user-space tools to talk to the mouse directly (that is, when it is not
associated with the host's HIDP stack) are at
http://github.com/entrope/linux-magicmouseSigned-off-by: NMichael Poole <mdpoole@troilus.org>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>