Driver requested device firmware version string during probe using
only 24 byte long buffer. That buffer is too small for newer firmware
versions, which causes device firmware hang - device stops responding
to any commands after that. Increase buffer size to 128 which should
be enough for any current and future version strings.
Link: https://github.com/airspy/host/issues/27
Cc: <stable@vger.kernel.org> # 3.17+
Reported-by: Benjamin Vernoux <bvernoux@gmail.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Used Avago MGA-81563 RF amplifier could be destroyed pretty easily
with too strong signal or transmitting to bad antenna.
Add module parameter 'enable_rf_gain_ctrl' which allows enabling
RF gain control - otherwise, default without the module parameter,
RF gain control is set to 'grabbed' state which prevents setting
value to the control.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
drivers/media/usb/hackrf/hackrf.c:1533 hackrf_probe()
error: we previously assumed 'dev' could be null (see line 1366)
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=sR0p
-----END PGP SIGNATURE-----
Merge tag 'media/v4.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media updates from Mauro Carvalho Chehab:
"Media updates, including:
- Lots of improvements at the kABI documentation
- Split of Videobuf2 into a common part and a V4L2 specific one
- Split of the VB2 tracing events into a separate header file
- s5p-mfc got support for Exynos 5433
- v4l2 fixes for 64-bits alignment when running 32 bits userspace
on ARM
- Added support for SDR radio transmitter at core, vivid and hackrf
drivers
- Some y2038 fixups
- Some improvements at V4L2 colorspace support
- saa7164 converted to use the V4L2 core control framework
- several new boards additions, cleanups and fixups
PS: There are two patches for scripts/kernel-doc that are needed by
the documentation patches on Media. Jon is OK on merging those via
my tree"
* tag 'media/v4.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (146 commits)
[media] c8sectpfe: Remove select on CONFIG_FW_LOADER_USER_HELPER_FALLBACK
[media] DocBook media: update copyright/version numbers
[media] ivtv: Convert to get_user_pages_unlocked()
[media] media/v4l2-ctrls: fix setting autocluster to manual with VIDIOC_S_CTRL
[media] DocBook media: Fix a typo in encoder cmd
[media] DocBook: add SDR specific info to G_MODULATOR / S_MODULATOR
[media] DocBook: add SDR specific info to G_TUNER / S_TUNER
[media] hackrf: do not set human readable name for formats
[media] hackrf: add support for transmitter
[media] hackrf: switch to single function which configures everything
[media] hackrf: add control for RF amplifier
[media] DocBook: add modulator type field
[media] v4l: add type field to v4l2_modulator struct
[media] DocBook: document SDR transmitter
[media] v4l2: add support for SDR transmitter
[media] DocBook: document tuner RF gain control
[media] v4l2: add RF gain control
[media] v4l2: rename V4L2_TUNER_ADC to V4L2_TUNER_SDR
[media] media/vivid-osd: fix info leak in ioctl
[media] media: videobuf2: Move v4l2-specific stuff to videobuf2-v4l2
...
Add lock to prevent concurrent access for control message as control
message function uses shared buffer. Without the lock there may be
remote control polling which messes the buffer causing IO errors.
Increase buffer size and add check for maximum supported message
length.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=103391
Fixes: c56222a6b2 ("[media] rtl28xxu: move usb buffers to state")
Cc: <stable@vger.kernel.org> # 4.0+
Signed-off-by: Antti Palosaari <crope@iki.fi>
Format names are set by core nowadays. Remove name from driver.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
HackRF SDR device has both receiver and transmitter. There is limitation
that receiver and transmitter cannot be used at the same time
(half-duplex operation). That patch implements transmitter support to
existing receiver only driver.
Signed-off-by: Antti Palosaari <crope@iki.fi>
[hans.verkuil@cisco.com: fix krobot unused variable warning]
[hans.verkuil@cisco.com: add back s_modulator from PATCHv4]
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Implement single funtion, hackrf_set_params(), which handles all
needed settings. Controls and other IOCTLs are just wrappers to that
function. That way we can get easily better control what we could do
on different device states - sleeping, receiving, transmitting.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
There is Avago MGA-81563 amplifier just right after antenna connector.
It could be turned on/off and its gain is around 12dB.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Replace struct v4l2_format * with void * to make queue_setup()
for common use.
And then, modify all device drivers related with this change.
Signed-off-by: Junghak Sung <jh1009.sung@samsung.com>
Signed-off-by: Geunyoung Kim <nenggun.kim@samsung.com>
Acked-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Acked-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
[hans.verkuil@cisco.com: fix missing const in fimc-lite.c]
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This enum is not actually used anymore. The only value used from
the enum is DMX_OK, passed as a parameter on two callbacks.
Yet, this value is not used anywhere. So, just remove it.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
The function can return negative value.
The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/assign_signed_to_unsigned.cocci [1].
[1]: http://permalink.gmane.org/gmane.linux.kernel/2046107
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Adds Terratec H7 Rev. 4 with USB id 0ccd:10a5 to DVBSky driver.
Signed-off-by: Erik Andresen <erik@vontaene.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Remove v4l2 stuff - v4l2_buf, v4l2_plane - from struct vb2_buffer.
Add new member variables - bytesused, length, offset, userptr, fd,
data_offset - to struct vb2_plane in order to cover all information
of v4l2_plane.
struct vb2_plane {
<snip>
unsigned int bytesused;
unsigned int length;
union {
unsigned int offset;
unsigned long userptr;
int fd;
} m;
unsigned int data_offset;
}
Replace v4l2_buf with new member variables - index, type, memory - which
are common fields for buffer management.
struct vb2_buffer {
<snip>
unsigned int index;
unsigned int type;
unsigned int memory;
unsigned int num_planes;
struct vb2_plane planes[VIDEO_MAX_PLANES];
<snip>
};
v4l2 specific fields - flags, field, timestamp, timecode,
sequence - are moved to vb2_v4l2_buffer in videobuf2-v4l2.c
struct vb2_v4l2_buffer {
struct vb2_buffer vb2_buf;
__u32 flags;
__u32 field;
struct timeval timestamp;
struct v4l2_timecode timecode;
__u32 sequence;
};
Signed-off-by: Junghak Sung <jh1009.sung@samsung.com>
Signed-off-by: Geunyoung Kim <nenggun.kim@samsung.com>
Acked-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Acked-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Make videobuf2-v4l2 as a wrapper of videobuf2-core for v4l2-use.
And replace videobuf2-core.h with videobuf2-v4l2.h.
This renaming change should be accompanied by the modifications
of all device drivers that include videobuf2-core.h.
It can be done with just running this shell script.
replace()
{
str1=$1
str2=$2
dir=$3
for file in $(find $dir -name *.h -o -name *.c -o -name Makefile)
do
echo $file
sed "s/$str1/$str2/g" $file > $file.out
mv $file.out $file
done
}
replace "videobuf2-core" "videobuf2-v4l2" "include/media/"
replace "videobuf2-core" "videobuf2-v4l2" "drivers/media/"
replace "videobuf2-core" "videobuf2-v4l2" "drivers/usb/gadget/"
replace "videobuf2-core" "videobuf2-v4l2" "drivers/staging/media/"
Signed-off-by: Junghak Sung <jh1009.sung@samsung.com>
Signed-off-by: Geunyoung Kim <nenggun.kim@samsung.com>
Acked-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Acked-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Instead of manually initializing the bool array enable, use the
SNDRV_DEFAULT_ENABLE_PNP macro. As most drivers do.
Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
The driver is using -1 instead of the -ENOMEM defined macro to specify
that a buffer allocation failed. Since the error number is propagated,
the caller will get a -EPERM which is the wrong error condition.
Also, the smatch tool complains with the following warning:
gen_mjpeghdr_to_package() warn: returning -1 instead of -ENOMEM is sloppy
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This is a preparation for a change to the type of v4l2 timestamps.
v4l2_get_timestamp() is a helper function that reads the monotonic
time and stores it into a 'struct timeval'. Multiple drivers implement
the same thing themselves for historic reasons.
Changing them all to use v4l2_get_timestamp() is more consistent
and reduces the amount of code duplication, and most importantly
simplifies the following changes.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
[hans.verkuil@cisco.com: dropped the v4l2-dev.c patch that didn't belong here]
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
The hardware timestamping implementation has been reported as not
working correctly on at least the Logitech C920. Until this can be
fixed, disable it by default.
Reported-by: Peter Rabbitson <rabbit@rabbit.us>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
While looking at use cases of the wake queues in order to add support
for simple wait queues, I noticed that there was only a single user of
wake_up_interruptible_nr(), and that use was doing a single task wake
up. Have that user use the proper wake_up_interruptible() instead, and
perhaps we can even remove the function wake_up_interruptible_nr().
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Using 8 URBs results in a consecutive buffer allocation of too much
memory for some arm devices.
As we use isochronuous transfers the number of URBs can be reduced
without risking data-loss.
Signed-off-by: Christian Loepke <loepke@edfritsch.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
i2c_driver does not need to set an owner because i2c_register_driver()
will set it.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Use eth_zero_addr to assign the zero address to the given address
array instead of memset when second argument is address of zero.
Note that the 6 in the third argument of memset appears to represent
an ethernet address size (ETH_ALEN).
The Coccinelle semantic patch that makes this change is as follows:
// <smpl>
@eth_zero_addr@
expression e;
@@
-memset(e,0x00,6);
+eth_zero_addr(e);
// </smpl>
Signed-off-by: Vaishali Thakkar <vthakkar1994@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Devices that were using a8293 SEC are converted to I2C platform data
thus that old config structure is left unused.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
These things are only initialized if you start streaming video, but
they are also used in the disconnect function. So just init them
always during probe time.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
The standards supported by S-Video and Composite inputs are not
limited by PAL, so make it more generic.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
In various places the stack was used to provide buffers for USB data, but
this should be allocated memory.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
If remove_pending is non-zero, then the v4l2_lock is never unlocked.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Set the colorspace and field in vidioc_try_fmt_vid_cap().
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
- setup initial radio and tv frequencies.
- set/get the correct frequency (radio vs tv).
- disable tuner/freq ioctls if there is no tuner.
- fix some tuner index checks.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
The radio device node had the same caps as the video node. Fix this.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
The g/s_audio ioctls didn't do anything, so remove them all for both
video and radio nodes and remove V4L2_CAP_AUDIO.
The enum/g/s_input ioctls are invalid for radio nodes, so remove them
from the radio ioctl_ops.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Convert this driver to the control framework and struct v4l2_fh
(needed for handling control events).
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This causes lots of problems and is *very* slow as well.
One of the main problems is that this prohibits the use of the control
framework since subdevs will be unloaded on power off which is not allowed
as long as they are used by a usb device.
Apparently the reason for doing this is to turn off a noisy tuner. My hardware
has no problem with that, and I wonder whether the hardware with that noisy
tuner wasn't just functioning improperly as I have never heard of noisy tuners.
Contact me if you have one of those devices and I can take a look whether the
tuner can't be powered off if necessary by letting the tuner subdevice go
into standby mode. Unloading the tuner module is just evil and is not the
right approach.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit implements frame decimation for stk1160, which allows
to support format changes instead of a static frame size.
The stk1160 supports independent row and column decimation, in two
different modes:
* set a number of rows/columns units to skip for each unit sent.
* set a number of rows/columns units to send for each unit skipped.
This effectively allows to achieve different frame scaling ratios.
The unit number can be set to either two row/columns sent/skipped,
or four row/columns sent/skipped. Since the video format (UYVY)
has 4-bytes, using a unit number of two row/columns results
in frame color 'shifting', so set to four row/columns sent/skipped.
Signed-off-by: Michael Stegemann <michael@stegemann.it>
Signed-off-by: Dale Hamel <dale.hamel@srvthe.net>
Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
These messages are not really informational, and just makes the driver's
output too verbose. This commit changes some messages to a debug level,
removes a really useless "driver loaded" message and finally undefines
the DEBUG macro.
Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Use kernel.h macro definition.
Thanks to Julia Lawall for Coccinelle scripting support.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This changes the keymap back to the state before commit 616a4b83
and changes the driver to use full NEC32 scancodes following the
instructions provided by Malcolm Priestley <tvboxspy@gmail.com>.
Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
API compliance scanning with coccinelle flagged:
./drivers/media/usb/gspca/m5602/m5602_s5k83a.c:180:9-25:
WARNING: timeout (100) seems HZ dependent
Numeric constants passed to schedule_timeout() make the effective
timeout HZ dependent which makes little sense in a polling loop for
the cameras rotation state.
Fixed up by converting the constant to jiffies with msecs_to_jiffies()
Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
We already know status is negative because of the earlier check so there
is no need to check again.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Fix the sequence counter: we're counting frames, not fields.
Also remove the unused 'field' field. That would only be needed if this driver
would support V4L2_FIELD_ALTERNATE.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Relative measurements are typically between 0 and 0xffff. However,
for some tuners (TUNER_S7395 and TUNER_S0194), the range were from
0 to 0xff00, with means that 100% is never archived.
Also, TUNER_RS2000 uses a more complex math.
So, create a macro that does the conversion using bit operations
and use it for all conversions.
The code is also easier to read with is a bonus.
While here, remove a bogus comment.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Cleanup this sparse warning:
drivers/media/usb/dvb-usb-v2/lmedm04.c:302 lme2510_update_stats() warn: should '((255 - st->signal_sn - 161) * 3) << 8' be a 64 bit type?
Both c_tmp and s_tmp actually stores a u16 stat. Using a u64 data
there is a waste, specially on u32 archs, as 64 ints there are more
expensive.
So, change the types to u32 and do the typecast only when storing
the result.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
The attribution of dev->boards occured too late, which
would couse an OOPS in media controller registration.
Signed-off-by: Rafael Lourenço de Lima Chehab <chehabrafael@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Indroduce function lme2510_update_stats to update
statistics directly from usb interrupt.
Provide signal and snr wrap rounds for dvb v3 functions.
Block and post bit are not available.
When i2c_talk_onoff is on no statistics are available,
with possible future hand over to the relevant frontend/tuner.
Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Following a change made to TS2020 tuner in patches
ts2020: Provide DVBv5 API signal strength
ts2020: Allow stats polling to be suppressed
Polling on the driver must be suppressed because
the demuxer is stopped by I2C messages.
Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
The TS2020 and TS2022 tuners take an input from the demodulator indicating the
AGC setting on that component that is then used to influence the tuner's own
gain. This should be taken into account when calculating the gain and signal
strength.
Further, the existing TS2020 driver miscalculates the signal strength as the
result of its calculations can exceed the storage capacity of the 16-bit word
used to return it to userspace.
To this end:
(1) Add a callback function (->get_agc_pwm()) in the ts2020_config struct that
the tuner can call to get the AGC PWM value from the demodulator.
(2) Modify the TS2020 driver to calculate the gain according to Montage's
specification with the adjustment that we produce a negative value and
scale it to 0.001dB units (which is what the DVBv5 API will require):
(a) Callback to the demodulator to retrieve the AGC PWM value and then
turn that into Vagc for incorporation in the calculations. If the
callback is unset, assume a Vagc of 0.
(b) Calculate the tuner gain from a combination of Vagc and the tuner's RF
gain and baseband gain settings.
(3) Turn this into a percentage signal strength as per Montage's
specification for return to userspace with the DVBv3 API.
(4) Provide a function in the M88DS3103 demodulator driver that can be used to
get the AGC PWM value on behalf of the tuner.
(5) The ts2020_config.get_agc_pwm function should be set by the code that
stitches together the drivers for each card.
For the DVBSky cards that use the M88DS3103 with the TS2020 or the TS2022,
set the get_agc_pwm function to point to m88ds3103_get_agc_pwm.
I have tested this with a DVBSky S952 card which has an M88DS3103 and a TS2022.
Thanks to Montage for providing access to information about the workings of
these parts.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
