linux-toradex.git/drivers/input/mouse/alps.c, branch v4.9.2

Input: ALPS - set DualPoint flag for 74 03 28 devices

2016-10-04T18:47:01+00:00

Here we introduce logic in alps_identify to set the ALPS_DUALPOINT flag
for touchpad hardware responding to E7 report with 73 03 28, as is found
in the Dell Latitude E7470.

Tested-by: Michal Hocko 
Signed-off-by: Ben Gamari 
Signed-off-by: Dmitry Torokhov

Input: ALPS - allow touchsticks to report pressure

2016-10-04T18:46:54+00:00

The SS5 hardware can report this.

Tested-by: Michal Hocko 
Signed-off-by: Ben Gamari 
Signed-off-by: Dmitry Torokhov

Input: ALPS - handle 0-pressure 1F events

2016-10-04T18:46:51+00:00

While a button is held SS5 hardware will give us single-finger packets
with x, y, and pressure equal to zero. This causes annoying jumps in
pointer position if a touch is released while the button is held. Handle
this by claiming zero contacts to ensure that no position events are
provided to the user.

Reviewed-by: Pali Rohár 
Tested-by: Michal Hocko 
Signed-off-by: Ben Gamari 
Signed-off-by: Dmitry Torokhov

Input: ALPS - add touchstick support for SS5 hardware

2016-10-04T18:46:41+00:00

Add touchstick support for the so-called SS5 hardware, which uses a
variant of the SS4 protocol.

Reviewed-by: Pali Rohár 
Tested-by: Michal Hocko 
Signed-off-by: Ben Gamari 
Signed-off-by: Dmitry Torokhov

Input: ALPS - report v3 pinnacle trackstick device only if is present

2016-01-07T00:06:47+00:00

This patch moves v3 pinnacle code for trackstick detection from
alps_hw_init_v3() to alps_set_protocol() so ALPS_DUALPOINT flag can be
cleared before registering trackstick input device in kernel.

Signed-off-by: Pali Rohár 
Acked-by: Hans de Goede 
Signed-off-by: Dmitry Torokhov

Input: ALPS - detect trackstick presence for v7 protocol

2016-01-07T00:06:46+00:00

This patch adds detection of trackstick for v7 protocol devices. Code in
this patch is used in official Dell touchpad linux drivers for Dell models:
Dell Latitude E5250/5250, E5450/5450, E5550/5550

Detection code and base reg for alps v3 rushmore and v7 devices is exacly
same.

Also user in bug https://bugzilla.kernel.org/show_bug.cgi?id=94801 reported
that Toshiba Sattellite Z30-A-1DG has only alps v7 touchpad device without
trackstick and kernel reports to userspace also redundant trackstick
device.

Signed-off-by: Pali Rohár 
Reviewed-by: Hans de Goede 
Tested-by: Alex Hung 
Signed-off-by: Dmitry Torokhov

Input: alps - only the Dell Latitude D420/430/620/630 have separate stick button bits

2015-10-27T00:23:48+00:00

commit 92bac83dd79e ("Input: alps - non interleaved V2 dualpoint has
separate stick button bits") assumes that all alps v2 non-interleaved
dual point setups have the separate stick button bits.

Later we limited this to Dell laptops only because of reports that this
broke things on non Dell laptops. Now it turns out that this breaks things
on the Dell Latitude D600 too. So it seems that only the Dell Latitude
D420/430/620/630, which all share the same touchpad / stick combo,
have these separate bits.

This patch limits the checking of the separate bits to only these models
fixing regressions with other models.

Reported-and-tested-by: Larry Finger 
Cc: stable@vger.kernel.org
Tested-by: Hans de Goede 
Signed-off-by: Hans de Goede 
Acked-By: Pali Rohár 
Signed-off-by: Dmitry Torokhov

Input: alps - only Dell laptops have separate button bits for v2 dualpoint sticks

2015-08-03T21:11:47+00:00

It turns out that only Dell laptops have the separate button bits for
v2 dualpoint sticks and that commit 92bac83dd79e ("Input: alps - non
interleaved V2 dualpoint has separate stick button bits") causes
regressions on Toshiba laptops.

This commit adds a check for Dell laptops to the code for handling these
extra button bits, fixing this regression.

This patch has been tested on a Dell Latitude D620 to make sure that it
does not reintroduce the original problem.

Reported-and-tested-by: Douglas Christman 
Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede 
Signed-off-by: Dmitry Torokhov

Merge branch 'next' into for-linus

2015-06-22T16:26:29+00:00

Prepare first round of input updates for 4.2 merge window.

Input: alps - do not reduce trackpoint speed by half

2015-06-05T05:34:40+00:00

On some v7 devices (e.g. Lenovo-E550) the deltas reported are typically
only in the 0-1 range dividing this by 2 results in a range of 0-0.

And even for v7 devices where this does not lead to making the trackstick
entirely unusable, it makes it twice as slow as before we added v7 support
and were using the ps/2 mouse emulation of the dual point setup.

If some kind of generic slowdown is actually necessary for some devices,
then that belongs in userspace, not in the kernel.

Cc: stable@vger.kernel.org
Reported-and-tested-by: Rico Moorman 
Signed-off-by: Hans de Goede 
Reviewed-by: Benjamin Tissoires 
Signed-off-by: Dmitry Torokhov