Currently, the v4l2 core is mixed together with other non-core drivers.
Move them into a separate directory.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

A pending cleanup will mean that module.h won't be implicitly
everywhere anymore.  Make sure the modular drivers in clocksource
are actually calling out for <module.h> explicitly in advance.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

Export v4l2_int_device_try_attach_all. This allows initiating the
initialisation of int if device after the drivers have been registered.

Also allow drivers to call ioctls if v4l2-int-if was compiled as
module.
Signed-off-by: NSakari Ailus <sakari.ailus@nokia.com>
Signed-off-by: NHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Now that it's in an own module it needs a MODULE_LICENSE.
Signed-off-by: NAdrian Bunk <bunk@kernel.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

V4L: Int if: Set slave's master before attach, remove master argument

The master also now gets its own pointer from slave's structure.
Signed-off-by: NSakari Ailus <sakari.ailus@nokia.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

The rest of V4L files.

There is one list_for_each+list_entry in cpia_pp.c that
wasn't changed because it expects the loop iterator to remain NULL if
the list is empty.

A bug in vivi is fixed; the 'safe' version needs to be used because the loop
deletes the list entries.

Simplify a second loop in vivi and get rid if an un-used variable in that loop.
Signed-off-by: NTrent Piepho <xyzzy@speakeasy.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

Signed-off-by: NSakari Ailus <sakari.ailus@nokia.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

vidioc_int_g_ifparm can be used to obtain hardware-specific information
about the interface used by the slave.

Rearrange v4l2-int-device.h as well.

Also remove useless & characters.
Signed-off-by: NSakari Ailus <sakari.ailus@nokia.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

This patch fixes the following build error:

<--  snip  -->

...
  MODPOST 2135 modules
make[2]: *** [__modpost] Error 1

<--  snip  -->
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

Fix a compile warning on non-32-bit machines in v4l2-int-device.h.
Add internal ioctl interface fallback function for ioctls with one
argument.
Signed-off-by: NSakari Ailus <sakari.ailus@nokia.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

This patch adds an internal ioctl-like interface which can be used in
situations where a single Video4Linux device is implemented by multiple
device drivers. One master device controls one or more slave devices.
The slaves provide Video4Linux ioctl-like interface for the use of the
master.

Only a handful of ioctls are implemented at the moment. More can (and
should) be added as more functionality is required.
Signed-off-by: NSakari Ailus <sakari.ailus@nokia.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>