USB should not be having it's own printk macros, so remove info() and
use the system-wide standard of dev_info() wherever possible.

Cc: Douglas Landgraf <dougsland@gmail.com>
Cc: Mike Isely <isely@pobox.com>
Cc: Thierry Merle <thierry.merle@free.fr>
Cc: Antoine Jacquet <royale@zerezo.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Count the users and do not use video_exclusive_open() anymore.
Signed-off-by: NAntoine Jacquet <royale@zerezo.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Remove the Big Kernel Lock from zr364xx driver after pushdown.
Now using an internal locking mecanism on open().
Signed-off-by: NAntoine Jacquet <royale@zerezo.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The BKL is now moved from the video_open function in v4l2-dev.c to the
various drivers. It seems about a third of the drivers already has a
lock of some sort protecting the open(), another third uses
video_exclusive_open (yuck!) and the last third required adding the
BKL in their open function.
Signed-off-by: NHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The type and type2 fields were unused and so could be removed.
Instead add a vfl_type field that contains the type of the video
device.
Signed-off-by: NHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

According to an old comment this should have been removed in 2.6.15.
Better late than never...
Signed-off-by: NHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

All ioctl callbacks are now stored in a new v4l2_ioctl_ops struct. Drivers fill in
a const struct v4l2_ioctl_ops and video_device just contains a const pointer to it.

This ensures a clean separation between the const ops struct and the non-const
video_device struct.
Signed-off-by: NHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

The functions in a header should not belong to another module. The prio functions
belong to v4l2-common.c, so move them to v4l2-common.h.

The ioctl functions belong to v4l2-ioctl.c, so create a new v4l2-ioctl.h header
and move those functions to it.
Signed-off-by: NHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

The naming for the callbacks that handle the VIDIOC_ENUM_FMT and
VIDIOC_S/G/TRY_FMT ioctls was very confusing. Renamed it to match
the v4l2_buf_type name.
Signed-off-by: NHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

- Static memory is always initialized with 0.
- Replaced in some cases C99 comments for /* */
Signed-off-by: NDouglas Schilling Landgraf <dougsland@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NAntoine Jacquet <royale@zerezo.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

Signed-off-by: NAntoine Jacquet <royale@zerezo.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

zr364: make file_operations const
Signed-off-by: NDouglas Schilling Landgraf <dougsland@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

Add Trust Powerc@m 970Z (0x06d6:0x003b) to the list of supported devices.
Signed-off-by: NAntoine Jacquet <royale@zerezo.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

This patch fixes several return value related problems in zr364xx.

- return -ENOMEM instead of -ENODEV on out of memory

- zr364xx checks video_register_device() error only when
  its return value is -1. But video_register_device() doesn't
  always return -1 on error.

- If usb_register() returns error, module_init() wrongly returns 1:
	retval = usb_register(&zr364xx_driver) < 0;
	...
	return retval;

  And it allows the module to be loaded. Because sys_init_module() doesn't
  see positive return value as error.
Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: NAntoine Jacquet <royale@zerezo.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

Some code to swap bytes wasn't using the swab16() function that the
kernel provides for this.  Make use of it, which results in more
efficient code.
Signed-off-by: NTrent Piepho <xyzzy@speakeasy.org>
Acked-by: NAntoine Jacquet <royale@zerezo.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

Add a missing header to fix compilation issue in the zr364xx driver when
CONFIG_VIDEO_V4L1 and CONFIG_VIDEO_V4L1_COMPAT are not set.
Signed-off-by: NAntoine Jacquet <royale@zerezo.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

This patch adds a V4L2 driver giving support for USB webcams based on the
zr364xx chipsets.
Signed-off-by: NAntoine Jacquet <royale@zerezo.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>