The changes here represent an intermediate step towards bringing the
driver within the V4L2 framework.
Signed-off-by: Mike Thomas <rmthomas@sciolus.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
No locking is required for normal operation of the driver, but locking
is needed to prevent an Oops during some hot-unplugging scenarios. The
BKL is replaced here by mutex locks together with traps to detect null
pointers following asynchronous device disconnection.
Signed-off-by: Mike Thomas <rmthomas@sciolus.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Replacing some of the large automatic variables by dynamically allocated
variables in the IOCTL routines gets rid of the compiler warning.
Signed-off-by: Mike Thomas <rmthomas@sciolus.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
A new module parameter adjusts the gain of the AC'97 audio chip, if
one is present. Attenuation as well as amplification should be possible
according to the datasheet, but attenuation seems not to work yet.
Signed-off-by: Mike Thomas <rmthomas@sciolus.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Interlaced modes are requested by tvtime. Reduced framerates are
preferred by some userspace programs, e.g. astronomy applications.
Signed-off-by: Mike Thomas <rmthomas@sciolus.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Sometimes at startup the video urbs consistently and persistently deliver
bad data, each video frame (not isoc frame) containing an excess of
precisely two bytes. A brute-force cure implemented here is to
repeatedly reinitialize the registers of the SAA7113H chip and the
STK1160 USB bridge until good behaviour is obtained.
Signed-off-by: Mike Thomas <rmthomas@sciolus.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
In order to allow multiple EasyCAP dongles to operate simultaneously
without mutual interference all static variables have been eliminated
except for a persistent inventory of plugged-in dongles at module level.
Signed-off-by: Mike Thomas <rmthomas@sciolus.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The so-called bridger routine has proved unnecessary following general
improvements elsewhere. The explain_() functions were a convenience
during early development, but are unnecessary and inappropriate now.
Signed-off-by: Mike Thomas <rmthomas@sciolus.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Upsampling from 8000 Hz mono to 32000 Hz stereo improves audio/video
synchronization when userspace programs adopt default buffering. This
is an experimental feature.
Signed-off-by: Mike Thomas <rmthomas@sciolus.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
New members of struct easycap take the place of undesirable global variables.
Signed-off-by: Mike Thomas <rmthomas@sciolus.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Mike Thomas