Input: i8042 - Add support for platform filter contexts

Currently the platform filter cannot access any driver-specific state
which forces drivers installing a i8042 filter to have at least some
kin

Input: i8042 - Add support for platform filter contexts

Currently the platform filter cannot access any driver-specific state
which forces drivers installing a i8042 filter to have at least some
kind of global pointer for their filter.

Allow callers of i8042_install_filter() to submit a context pointer
which is then passed to the i8042 filter. This frees drivers from the
responsibility of having to manage this global pointer themself.

Also introduce a separate type for the i8042 filter (i8042_filter_t)
so that the function definitions can stay compact.

Tested on a Dell Inspiron 3505.

Reviewed-by: Ilpo Järvinen <[email protected]>
Acked-by: Dmitry Torokhov <[email protected]>
Signed-off-by: Armin Wolf <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Ilpo Järvinen <[email protected]>

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Input: i8042 - add missing include

<linux/i8042.h> include uses ENODEV when included with
!IS_ENABLED(CONFIG_SERIO_I8042) and so need to include it.

Signed-off-by: Michał Mirosław <mirq-linux@rere.

Input: i8042 - add missing include

<linux/i8042.h> include uses ENODEV when included with
!IS_ENABLED(CONFIG_SERIO_I8042) and so need to include it.

Signed-off-by: Michał Mirosław <[email protected]>
Link: https://lore.kernel.org/r/49fd4d400d1ab62095e5ed75a6637f883c0d071b.1682795105.git.mirq-linux@rere.qmqm.pl
Signed-off-by: Dmitry Torokhov <[email protected]>

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

Based on 2 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of th

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

Based on 2 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation #

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-only

has been chosen to replace the boilerplate/reference in 4122 file(s).

Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Enrico Weigelt <[email protected]>
Reviewed-by: Kate Stewart <[email protected]>
Reviewed-by: Allison Randal <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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Input: i8042 - break load dependency between atkbd/psmouse and i8042

As explained in [email protected] we
have a hard load dependency between i8042 and atkbd which

Input: i8042 - break load dependency between atkbd/psmouse and i8042

As explained in [email protected] we
have a hard load dependency between i8042 and atkbd which prevents
keyboard from working on Gen2 Hyper-V VMs.

> hyperv_keyboard invokes serio_interrupt(), which needs a valid serio
> driver like atkbd.c. atkbd.c depends on libps2.c because it invokes
> ps2_command(). libps2.c depends on i8042.c because it invokes
> i8042_check_port_owner(). As a result, hyperv_keyboard actually
> depends on i8042.c.
>
> For a Generation 2 Hyper-V VM (meaning no i8042 device emulated), if a
> Linux VM (like Arch Linux) happens to configure CONFIG_SERIO_I8042=m
> rather than =y, atkbd.ko can't load because i8042.ko can't load(due to
> no i8042 device emulated) and finally hyperv_keyboard can't work and
> the user can't input: https://bugs.archlinux.org/task/39820
> (Ubuntu/RHEL/SUSE aren't affected since they use CONFIG_SERIO_I8042=y)

To break the dependency we move away from using i8042_check_port_owner()
and instead allow serio port owner specify a mutex that clients should use
to serialize PS/2 command stream.

Reported-by: Mark Laws <[email protected]>
Tested-by: Mark Laws <[email protected]>
Cc: [email protected]
Signed-off-by: Dmitry Torokhov <[email protected]>

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Input: add driver for slidebar on Lenovo IdeaPad laptops

This driver adds support for slidebars found on some Lenovo IdeaPad
laptops (the slidebars work with SlideNav/Desktop Navigator under
Windows

Input: add driver for slidebar on Lenovo IdeaPad laptops

This driver adds support for slidebars found on some Lenovo IdeaPad
laptops (the slidebars work with SlideNav/Desktop Navigator under
Windows).

Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=16004

Registers 'IdeaPad Slidebar' input device and
/sys/devices/platform/ideapad_slidebar/slidebar_mode
for switching slidebar's modes.

Now works on:
IdeaPad Y550, Y550P.

May work on (testing and adding new models is needed):
Ideapad Y560, Y460, Y450, Y650,
and, probably, some others.

Signed-off-by: Andrey Moiseev <[email protected]>
Signed-off-by: Dmitry Torokhov <[email protected]>

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Input: i8042 - mark stubs in i8042.h "static inline"

Otherwise we may run into following:

drivers/platform/built-in.o: In function `i8042_lock_chip':
/home/test/ws2/projects/linux-2.6/include/linux

Input: i8042 - mark stubs in i8042.h "static inline"

Otherwise we may run into following:

drivers/platform/built-in.o: In function `i8042_lock_chip':
/home/test/ws2/projects/linux-2.6/include/linux/i8042.h:50: multiple definition of `i8042_lock_chip'
drivers/input/serio/built-in.o:/home/test/ws2/projects/linux-2.6/include/linux/i8042.h:50: first defined here
...
make[1]: *** [drivers/built-in.o] Error 1
make: *** [drivers] Error 2

Signed-off-by: Feng Tang <[email protected]>
Signed-off-by: Dmitry Torokhov <[email protected]>

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Input: i8042 - allow installing platform filters for incoming data

Some hardware (such as Dell laptops) signal a variety of events through
the i8042 controller, even if these don't map to keyboard e

Input: i8042 - allow installing platform filters for incoming data

Some hardware (such as Dell laptops) signal a variety of events through
the i8042 controller, even if these don't map to keyboard events. Add
support for drivers to filter the i8042 event stream in order to respond
to these events and (if appropriate) block them from entering the input
stream.

Signed-off-by: Matthew Garrett <[email protected]>
Signed-off-by: Dmitry Torokhov <[email protected]>

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Input: libps2 - additional locking for i8042 ports

The serio ports on i8042 are not completely isolated; while we provide
enough locking to ensure proper serialization when accessing control
and dat

Input: libps2 - additional locking for i8042 ports

The serio ports on i8042 are not completely isolated; while we provide
enough locking to ensure proper serialization when accessing control
and data registers AUX and KBD ports can still have an effect on each
other on PS/2 protocol level. The most prominent effect is that
issuing a command for the device connected to one port may cause
abort of the command currently executing by the device connected to
another port.

Since i8042 nor serio subsystem are not aware of the details of the
PS/2 protocol (length of the commands and their replies and so on) the
locking should be done on libps2 level by adding special handling when
we see that we are dealing with serio port on i8042.

Signed-off-by: Dmitry Torokhov <[email protected]>

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Input: i8042 - export i8042_command()

Export the i8042_command() function which manages the mutual
exclusion with the help of the i8042_lock spinlock. This allows
to access i8042 safely from other p

Input: i8042 - export i8042_command()

Export the i8042_command() function which manages the mutual
exclusion with the help of the i8042_lock spinlock. This allows
to access i8042 safely from other parts of the kernel.

Signed-off-by: Márton Németh <[email protected]>
Signed-off-by: Dmitry Torokhov <[email protected]>

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