Add documentation for V4L2 flash controls.
Signed-off-by: NSakari Ailus <sakari.ailus@iki.fi>
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Add a control class and a set of controls to support LED and Xenon flash
devices. An example of such a device is the adp1653.
Signed-off-by: NSakari Ailus <sakari.ailus@iki.fi>
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

[mchehab@redhat.com: Fix a merge conflict and make compat.xml coherent with v4l2.xml]
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Acked-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Acked-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Fix sleep-in-atomic-context bug in vivi:

Jun 28 18:14:39 tschai kernel: [   80.970478] BUG: sleeping function called from invalid context at kernel/mutex.c:271
Jun 28 18:14:39 tschai kernel: [   80.970483] in_atomic(): 0, irqs_disabled(): 1, pid: 2854, name: vivi-000
Jun 28 18:14:39 tschai kernel: [   80.970485] INFO: lockdep is turned off.
Jun 28 18:14:39 tschai kernel: [   80.970486] irq event stamp: 0
Jun 28 18:14:39 tschai kernel: [   80.970487] hardirqs last  enabled at (0): [<          (null)>]           (null)
Jun 28 18:14:39 tschai kernel: [   80.970490] hardirqs last disabled at (0): [<ffffffff8109a90b>] copy_process+0x61b/0x1440
Jun 28 18:14:39 tschai kernel: [   80.970495] softirqs last  enabled at (0): [<ffffffff8109a90b>] copy_process+0x61b/0x1440
Jun 28 18:14:39 tschai kernel: [   80.970498] softirqs last disabled at (0): [<          (null)>]           (null)
Jun 28 18:14:39 tschai kernel: [   80.970502] Pid: 2854, comm: vivi-000 Tainted: P            3.0.0-rc1-tschai #372
Jun 28 18:14:39 tschai kernel: [   80.970504] Call Trace:
Jun 28 18:14:39 tschai kernel: [   80.970509]  [<ffffffff81089be3>] __might_sleep+0xf3/0x130
Jun 28 18:14:39 tschai kernel: [   80.970512]  [<ffffffff8176967f>] mutex_lock_nested+0x2f/0x60
Jun 28 18:14:39 tschai kernel: [   80.970517]  [<ffffffffa0acee3e>] vivi_fillbuff+0x20e/0x3f0 [vivi]
Jun 28 18:14:39 tschai kernel: [   80.970520]  [<ffffffff81407004>] ? do_raw_spin_lock+0x54/0x150
Jun 28 18:14:39 tschai kernel: [   80.970524]  [<ffffffff8104ef5e>] ? read_tsc+0xe/0x20
Jun 28 18:14:39 tschai kernel: [   80.970528]  [<ffffffff810c9d87>] ? getnstimeofday+0x57/0xe0
Jun 28 18:14:39 tschai kernel: [   80.970531]  [<ffffffffa0acf1b1>] vivi_thread+0x191/0x2f0 [vivi]
Jun 28 18:14:39 tschai kernel: [   80.970534]  [<ffffffff81093aa0>] ? try_to_wake_up+0x2d0/0x2d0
Jun 28 18:14:39 tschai kernel: [   80.970537]  [<ffffffffa0acf020>] ? vivi_fillbuff+0x3f0/0x3f0 [vivi]
Jun 28 18:14:39 tschai kernel: [   80.970541]  [<ffffffff810bff46>] kthread+0xb6/0xc0
Jun 28 18:14:39 tschai kernel: [   80.970544]  [<ffffffff817743e4>] kernel_thread_helper+0x4/0x10
Jun 28 18:14:39 tschai kernel: [   80.970547]  [<ffffffff8176b4d4>] ? retint_restore_args+0x13/0x13
Jun 28 18:14:39 tschai kernel: [   80.970550]  [<ffffffff810bfe90>] ? __init_kthread_worker+0x70/0x70
Jun 28 18:14:39 tschai kernel: [   80.970552]  [<ffffffff817743e0>] ? gs_change+0x13/0x13

This bug was introduced in 2.6.39.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

By default no control events are sent to the application that caused the
control value or flags change (i.e. the control(s) passed to VIDIOC_S_CTRL
or VIDIOC_S_EXT_CTRLS). But if a change in one control causes a change in
another control that was not part of the control(s) in VIDIOC_S_CTRL or
S_EXT_CTRLS, then the application should be notified.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The new values were never copied to userspace due to this copy and paste
error. This was introduced during the rewrite of this part of the code in
commit 3219f8a362640b7e4b7e2187b1094c4e46d85aa0.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Remove unused pwc-ioctl.h (the copy in include/media is used everywhere)
Remove almost empty pwc-uncompress.h, move single define to pwc.h
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This makes the API for this:
1) v4l2 spec compliant
2) match that of the UVC Logitech QuickCam Sphere models

For now this operates in parellel to the sysfs interface for this, but the
intend is to deprecate the sysfs interface and remove it.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Also remove all the converting from native range to 0-65535 and back
that was going on. This is no longer needed now that we no longer support
v4l1.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Allow multiple opens of the /dev/video node so that control panel apps
can be open to-gether with streaming apps.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Doing a bunch of initialization every time /dev/video is opened, and thus
for example when the udev rules probe for capabilities makes no sense,
do it at driver load, resp. stream start instead.

This is a preparation patch for allowing multiple opens of the /dev/video
node.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

  as vcinterface must be set before calling pwc_camera_power()
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Having 2 ways of tracking disconnection is too much, remove both and
instead simply set pdev->udev to NULL on disconnect. Also check for
pdev->udev being NULL in all possible entry paths.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Looking at the pwc buffer management code has made it clear to me it needed
some serious fixing. Not only was there a ton of code duplication even
internally to pwc (read and mmap wait for frame code was duplicated), the
code also was outright buggy. With the worst offender being dqbuf, which
just round robin returned all the mmap buffers, without paying any attention
to them being queued by the app with qbuf or not. And qbuf itself was a noop.

So I set out to fix this and already had some cleanups in place when
I read Jonathan Corbet's lwn article on videobuf2, this inspired me to just
rip out the buffer management code and replace it with videobuf2, greatly
reducing the amount of code, and fixing all bugs in one go:

Many thanks to Jonathan for the timely article on this !
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The chances if any of these becoming NULL magically are 0% And if they
do become NULL oopsing is the right thing to do (so that the user logs a
bug with the kernel rather then with whatever app he was using).

Returning EFAULT to userspace should only be done when userspace supplies
a bad address, not on driver bugs / hw issues, so in the few cases where the
check is not bogus return something else.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Just like in userspace strncpy does not guarantee 0 termination. Use strlcpy
instead which does guarantee 0 termination.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Don't issue a stream stop to the camera at the end of sd_start, this fixes
streaming with this particular model.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Based on the old v4l1 camera by Jeroen Vreeken driver which recently got
removed from the kernel.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Reset image and image_len to NULL/0 on LAST_PACKET when we're in discard
frame mode, just like we do when not discarding the current frame.

The new se401 driver uses image_len for SOF/EOF detection and thus depends on
this.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

In the webcam 041e:405f, the LED is inverted.
Signed-off-by: NJean-François Moine <moinejf@free.fr>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The sensor of some webcams could not be detected due to timing problems
in sensor register reading. This patch adds bridge register readings
before sensor register reading.
Signed-off-by: NJean-François Moine <moinejf@free.fr>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Mauro Carvalho Chehab wrote:
> I'm validating if all drivers are behaving equally with respect to the
> error codes returned to userspace, and double-checking with the API.
>
> On almost all places, -EFAULT code is used only to indicate when
> copy_from_user/copy_to_user fails. However, firedtv uses a lot of
> -EFAULT, where it seems to me that other error codes should be used
> instead (like -EIO for bus transfer errors and -EINVAL/-ERANGE for
> invalid/out of range parameters).

This concerns only the CI (CAM) related code of firedtv of which I know
little.  Let's just pass through the error returns of lower level I/O
code where applicable, and -EACCES (permission denied) when a seemingly
valid but negative FCP response or an unknown-to-firedtv CA message is
received.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>
Cc: Henrik Kurelid <henrik@kurelid.se>
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Those drivers are not relying at the V4L2 core to handle the ioctl's.
So, we need to manually patch them every time a change goes to the
core.
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Acked-By: NMike Isely <isely@pobox.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Currently, -EINVAL is used to return either when an IOCTL is not
implemented, or if the ioctl was not implemented.
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

While here, removes the bogus EINTERNAL error codes.
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Move generic stuff into gen-errors.xml, and remove them from
DVB API. While here, removes two bogus error codes that aren't
supported or used on Linux: EINTERNAL and ENOSIGNAL.
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

When a device (or their PCI structs) are not found, the error should
be -ENODEV. -EFAULT is reserved for errors while copying arguments
from/to userspace.
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Remove generic errors from ioctl() descriptions. For other ioctl's,
there's no generic section. So, just keep whatever is there.
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Remove generic errors from ioctl() descriptions. For other ioctl's,
there's no generic section. So, just keep whatever is there.
Also remove the EINTERNAL error code, as no DVB driver returns
it, and this error code is not defined on POSIX or on Linux.
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>