We don't need linux/usb/input.h but, instead, linux/input.h
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

We'll need to register a sysfs class for the IR devices. As such, the better
is to have the input_register_device()/input_unregister_device() inside
the ir register/unregister functions.

Also, solves a naming problem with V4L ir_input_init() function, that were,
in fact, registering a device.

While here, do a few cleanups at budget-ci IR logic.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Now, ir_input_free does more than just freeing the keytab. Better to
rename it as ir_input_unregister.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Move non-V4L specific stuff from ir-functions ir_input_init() into
a new function to register ir devices: ir_input_register().
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Split the ir-common into two separate modules:
	- ir-core: it is the IR-independent functions;
	- ir-common: has the common part used by V4L drivers.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This is the first step of creating a common code for IR that can be
used by other input devices.

For now, keep IR dir at drivers/media, to easy the movement of the IR files,
but later patches may move it to drivers/IR or drivers/input/IR.

No functional changes is done on this patch.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

As reported by Sander Eikelenboom <linux@eikelemboon.it>:

> Tried to update my v4l-dvb modules today, but got a bug with my pinnacle
> card, seems to be related to the recent changes in the ir code.
>
> Dec  5 23:30:25 security kernel: [    5.735698] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
> Dec  5 23:30:25 security kernel: [    5.735716] IP: [<ffffffffa00997be>] :ir_common:ir_input_free+0x26/0x3e

Thanks-to: Sander Eikelenboom <linux@eikelemboon.it> for reporting and testing the fix.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The same loop to seek for a key were used on different places. Also,
no spinlock were protecting it to avoid the risk of replacing a keycode
while seeking for a new code.

This cleanup does:
	- create an unique function to seek for a code;
	- adds an spinlock to protect the table lookup;
	- remove some unused code;
	- simplifies to code to make it easier to understand.

Basically no change in behavior should be noticed after this patch.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

V4L drivers use an static keycode vector with 128 entries, where the scancode
indexes the keycode. While this works, it limits the scancodes to have only
7 bits, not allowing for example full RC5 codes.

Instead of implementing the same code on every V4L driver, provide a common
infrastructure to handle the bigger tables, minimizing the changes inside
each driver.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>