Move some temporary capture tracking date to the em28xx_v4l2 struct,
as those info are used only by em28xx v4l2 submodule.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Move camera sensor resolution and xtal out of em28xx common struct,
as thore are used only by the em28xx v4l2 submodule.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

The video progressive data fields belong to analog TV. Move them out
of the common em28xx struct.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

The analog format struct belongs to analog TV. Move it out of the
common em28xx struct.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

TV norm is specific to analog TV reception. move it out of the common
em28xx struct.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

The video input mode and control data also belong only to the
analog side. move them to struct em28xx_v4l.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

The em28xx scaler data are used only for analog video. Move them to
struct em28xx_v4l2.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

The video and VBI-specific VB2 queue and mutexes are used only by
the v4l2 sub-driver. Move them to the V4L2 struct, preventing
wasting memory if this sub-driver is not used.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

There are 3 struct video_device at the em28xx common struct,
for video, VBI and radio. They all are used only by the V4L2 driver.
So, move them to the v4l2-specific struct.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

The current clock definition applies only to the V4L2 side of the
driver. Move its struct pointer to the v4l2_dev, where it belongs.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Controls are only applicable to V4L2 module. Move the corresponding
data structs to the proper place.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

That reduces a little bit the memory footprint when em28xx-video
is not loaded.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

[media] em28xx-video: simplify usage of the pointer to struct v4l2_ctrl_handler in em28xx_v4l2_init()

The local var hdl is already pointing to &dev->ctrl_handler.
Use it, instead of dereferencing it all the time.

Code cleanup. No functional changes.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

em28xx_compression_disable() is a single line function which is called only one
time and this call also isn't needed.
Register 0x26 is always configured as part of the scaler configuration, which
in turn is always done when the resolution changes. And the initial resolution
setting is applied at first device open.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

The vb2 core ignores any return code from the stop_streaming op.
And there really isn't anything it can do anyway in case of an error.
So change the return type to void and update any drivers that implement it.

The int return gave drivers the idea that this operation could actually
fail, but that's really not the case.

The pwc amd sdr-msi3101 drivers both had this construction:

        if (mutex_lock_interruptible(&s->v4l2_lock))
                return -ERESTARTSYS;

This has been updated to just call mutex_lock(). The stop_streaming op
expects this to really stop streaming and I very much doubt this will
work reliably if stop_streaming just returns without really stopping the
DMA.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Acked-by: NPawel Osciak <pawel@osciak.com>
Acked-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

We can't free struct em28xx while one of the extensions is still
using it.

So, add a kref() to control it, freeing it only after the
extensions fini calls.
Reviewed-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

The timestamp_type field used to contain only the timestamp type. Soon it
will be used for timestamp source flags as well. Rename the field
accordingly.

[m.chehab@samsung.com: do the change also to drivers/staging/media and at s2255]
Signed-off-by: NSakari Ailus <sakari.ailus@iki.fi>
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Implement em28xx_ops: suspend/resume hooks. em28xx usb driver will
invoke em28xx_ops: suspend and resume hooks for all its extensions
from its suspend() and resume() interfaces.
Signed-off-by: NShuah Khan <shuah.kh@samsung.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

This avoids the unnecessary temporary registration of a dummy V4L2 clock.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

[media] em28xx-video: do not unregister the v4l2 dummy clock before v4l2_device_unregister() has been called

Otherwiese the core refuses to unregister the clock and the following warning
appears in the system log:

"WARNING: ... at drivers/media/v4l2-core/v4l2-clk.c:231 v4l2_clk_unregister+0x8a/0x90 [videodev]()
 v4l2_clk_unregister(): Refusing to unregister ref-counted 11-0030:mclk clock!"
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

The current code assumes that the analog + digital video endpoints are always at
interface number 0 when changing the alternate setting.
This seems to work fine for most existing devices.
However, at least the SpeedLink VAD Laplace webcam has the video endpoint on
interface number 3 (which fortunately doesn't cause any trouble because ist uses
bulk transfers only).
We already consider the actual interface number for audio endpoints, so
rename the the audio_ifnum variable and use it for all device types.
Also get get rid of a pointless (ifnum < 0) in em28xx-audio.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

sparse warnings: (new ones prefixed by >>)

>> drivers/media/usb/em28xx/em28xx-video.c:1151:28: sparse: symbol 'em28xx_ctrl_ops' was not declared. Should it be static?
Signed-off-by: NFengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Avoid circular mutex lock by pushing the dev->lock to the .fini
callback on each extension.

As em28xx-dvb, em28xx-alsa and em28xx-rc have their own data
structures, and don't touch at the common structure during .fini,
only em28xx-v4l needs to be locked.

[   90.994317] ======================================================
[   90.994356] [ INFO: possible circular locking dependency detected ]
[   90.994395] 3.13.0-rc1+ #24 Not tainted
[   90.994427] -------------------------------------------------------
[   90.994458] khubd/54 is trying to acquire lock:
[   90.994490]  (&card->controls_rwsem){++++.+}, at: [<ffffffffa0177b08>] snd_ctl_dev_free+0x28/0x60 [snd]
[   90.994656]
[   90.994656] but task is already holding lock:
[   90.994688]  (&dev->lock){+.+.+.}, at: [<ffffffffa040db81>] em28xx_close_extension+0x31/0x90 [em28xx]
[   90.994843]
[   90.994843] which lock already depends on the new lock.
[   90.994843]
[   90.994874]
[   90.994874] the existing dependency chain (in reverse order) is:
[   90.994905]
-> #1 (&dev->lock){+.+.+.}:
[   90.995057]        [<ffffffff810b8fa3>] __lock_acquire+0xb43/0x1330
[   90.995121]        [<ffffffff810b9f82>] lock_acquire+0xa2/0x120
[   90.995182]        [<ffffffff816a5b6c>] mutex_lock_nested+0x5c/0x3c0
[   90.995245]        [<ffffffffa0422cca>] em28xx_vol_put_mute+0x1ba/0x1d0 [em28xx_alsa]
[   90.995309]        [<ffffffffa017813d>] snd_ctl_elem_write+0xfd/0x140 [snd]
[   90.995376]        [<ffffffffa01791c2>] snd_ctl_ioctl+0xe2/0x810 [snd]
[   90.995442]        [<ffffffff811db8b0>] do_vfs_ioctl+0x300/0x520
[   90.995504]        [<ffffffff811dbb51>] SyS_ioctl+0x81/0xa0
[   90.995568]        [<ffffffff816b1929>] system_call_fastpath+0x16/0x1b
[   90.995630]
-> #0 (&card->controls_rwsem){++++.+}:
[   90.995780]        [<ffffffff810b7a47>] check_prevs_add+0x947/0x950
[   90.995841]        [<ffffffff810b8fa3>] __lock_acquire+0xb43/0x1330
[   90.995901]        [<ffffffff810b9f82>] lock_acquire+0xa2/0x120
[   90.995962]        [<ffffffff816a762b>] down_write+0x3b/0xa0
[   90.996022]        [<ffffffffa0177b08>] snd_ctl_dev_free+0x28/0x60 [snd]
[   90.996088]        [<ffffffffa017a255>] snd_device_free+0x65/0x140 [snd]
[   90.996154]        [<ffffffffa017a751>] snd_device_free_all+0x61/0xa0 [snd]
[   90.996219]        [<ffffffffa0173af4>] snd_card_do_free+0x14/0x130 [snd]
[   90.996283]        [<ffffffffa0173f14>] snd_card_free+0x84/0x90 [snd]
[   90.996349]        [<ffffffffa0423397>] em28xx_audio_fini+0x97/0xb0 [em28xx_alsa]
[   90.996411]        [<ffffffffa040dba6>] em28xx_close_extension+0x56/0x90 [em28xx]
[   90.996475]        [<ffffffffa040f639>] em28xx_usb_disconnect+0x79/0x90 [em28xx]
[   90.996539]        [<ffffffff814a06e7>] usb_unbind_interface+0x67/0x1d0
[   90.996620]        [<ffffffff8142920f>] __device_release_driver+0x7f/0xf0
[   90.996682]        [<ffffffff814292a5>] device_release_driver+0x25/0x40
[   90.996742]        [<ffffffff81428b0c>] bus_remove_device+0x11c/0x1a0
[   90.996801]        [<ffffffff81425536>] device_del+0x136/0x1d0
[   90.996863]        [<ffffffff8149e0c0>] usb_disable_device+0xb0/0x290
[   90.996923]        [<ffffffff814930c5>] usb_disconnect+0xb5/0x1d0
[   90.996984]        [<ffffffff81495ab6>] hub_port_connect_change+0xd6/0xad0
[   90.997044]        [<ffffffff814967c3>] hub_events+0x313/0x9b0
[   90.997105]        [<ffffffff81496e95>] hub_thread+0x35/0x170
[   90.997165]        [<ffffffff8108ea2f>] kthread+0xff/0x120
[   90.997226]        [<ffffffff816b187c>] ret_from_fork+0x7c/0xb0
[   90.997287]
[   90.997287] other info that might help us debug this:
[   90.997287]
[   90.997318]  Possible unsafe locking scenario:
[   90.997318]
[   90.997348]        CPU0                    CPU1
[   90.997378]        ----                    ----
[   90.997408]   lock(&dev->lock);
[   90.997497]                                lock(&card->controls_rwsem);
[   90.997607]                                lock(&dev->lock);
[   90.997697]   lock(&card->controls_rwsem);
[   90.997786]
[   90.997786]  *** DEADLOCK ***
[   90.997786]
[   90.997817] 5 locks held by khubd/54:
[   90.997847]  #0:  (&__lockdep_no_validate__){......}, at: [<ffffffff81496564>] hub_events+0xb4/0x9b0
[   90.998025]  #1:  (&__lockdep_no_validate__){......}, at: [<ffffffff81493076>] usb_disconnect+0x66/0x1d0
[   90.998204]  #2:  (&__lockdep_no_validate__){......}, at: [<ffffffff8142929d>] device_release_driver+0x1d/0x40
[   90.998383]  #3:  (em28xx_devlist_mutex){+.+.+.}, at: [<ffffffffa040db77>] em28xx_close_extension+0x27/0x90 [em28xx]
[   90.998567]  #4:  (&dev->lock){+.+.+.}, at: [<ffffffffa040db81>] em28xx_close_extension+0x31/0x90 [em28xx]
Reviewed-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Tested-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

That helps to identify if something fails and explain why em28xx
struct is not freed (if it ever happens).
Reviewed-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Tested-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Remove some dead code from em28xx_v4l2_fini() and fix the leaking of the video,
vbi and radio video_device struct memories.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

When the usb device is disconnected, the resources are no longer available,
so there is no reason to keep them registered.

This will also fix the various sysfs group removal warnings which we can see
since kernel 3.13.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

[media] em28xx-v4l: move v4l2_ctrl_handler freeing and v4l2_device unregistration to em28xx_v4l2_fini

v4l2_ctrl_handler_free() and v4l2_device_unregister() are currently only called
when the last user closes the device and the device is already disconnected.
But that's wrong, we need to call these functions whenever the em28xx-v4l
extension is closed and we can already do this if the device is still opened
by some users.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

- bail out on unsupported VFL_TYPE
- em28xx_set_mode() needs to be called for VBI and radio mode, too
- em28xx_wake_i2c() needs to be called for VBI and radio mode, too
- em28xx_resolution_set() also needs to be called for VBI
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Now that em28xx can be compiled without V4L support, we should
call em28xx_setup_xc3028() on both em28xx-v4l and em28xx-dvb
modules.
Reported-by: NChris Lee <updatelee@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

A few devices (em2860) use a separate interface for audio only
Audio Vendor Class USB. That interface should not be used by
Remote Controller, Analog TV or Digital TV.

Prevents initializing all non-audio extensions for the audio
only interface.
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Use the same module version on all em28xx sub-modules, and use
the same naming convention to describe the driver.
Reviewed-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Add a message with consistent prints before and after each
extension initialization, and provide a better text for module
load.

While here, add a missing sanity check for extension finish
code at em28xx-v4l extension.
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Now that all analog-specific code are at em28xx-video, convert
it into an em28xx extension and load it as a separate module.
Reviewed-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Tested-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

There are several init code inside em28xx-cards that are actually
part of analog initialization. Move the code to em28x-video, in
order to remove part of the mess.

In thesis, no functional changes so far.
Reviewed-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

In order to make easier for the next patches, do some
cosmetic changes.

No functional changes.
Reviewed-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Now that we want to split the video handling to a separate
module, move all video-specific functions to em28xx-video.

No functional changes.
Reviewed-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>