For frontends with ISDB-T, DVB-T2, CMDBTH, etc, some code is
needed, in order to provide emulation. Add such code, and check
if the desired delivery system is supported by the frontend.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Get rid of using ops->info.type defined on DVB drivers,
as it doesn't apply anymore.

Currently, one driver (cxd2820) supports more than one different
info.type, as it can be used for DVB-T/T2 and DVB-C. There are more
drivers like that to come. So, the same frontend will have

different DVBv3 types, depending on the current delivery system.

This breaks the existing logic at dvb_frontend, that assumes that
just one delivery system DVBv3 type is supported by all delsys.

In order to easy the DVBv3->DVBv5 conversion, an ancillary function
that maps DVBv3 delivery systems into DVBv5 were added.

Also, on all places, except for the event logic, the DVBv5 cache
will be used to check parameters, instead of the DVBv5 copy.

This patch simplifies the cache sync logic, and warrants that the
cache will be in a clear state at DVB frontend register. This way,
ops->info.type will be filled to reflect the first delivery system,
providing backward compatibility support for it.

For example, in the cases like cxd2820, where the delivery systems
are defined as:
        .delsys = { SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A },

A pure DVBv3 will be able to use both DVB-T and DVB-T2, as, at
DVB cache clear, the ops->info.type will be equal to FE_OFDM.

However, DVB-C won't be visible. A quick workaround would be to
do a DVBv5 call to set the delivery system to SYS_DVBC_ANNEX_A.

After such call, ops->info.type will be equal to FE_QAM, and a
DVBv3 application will see the frontend as a DVB-C one.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

This change is there in order to prepare the code to avoid calling
 dvb_frontend_ioctl_legacy() from FE_SET_PROPERTY.

A call to dvb_frontend_ioctl_legacy() would require to update the
DVBv3 cache without need, mangling calls for newer delivery system
without any reason.

No functional changes here.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Due to DVB-T2, several new possible values for bandwidth were added.
As the DVBv3 struct were updated to handle them, the core needs to
handle all of them, as a DVBv3 application might try to use it.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

By default, initialize the frontend current delivery system with
the first one. This warrants that a DVBv3 application will be able
to tune to it, after the removal of ops->init.type filling at
the drivers.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Return the complete RC-5 code, instead of just the 8 least significant
bits.
Reported-by: Dorozel Csaba <mrjuuzer@upcmail.hu>
Tested-by: Dorozel Csaba <mrjuuzer@upcmail.hu>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Only the ioctl core should see the DVBv3 compat stuff, as its
contents are not available anymore to the drivers.

As fs/compat_ioctl also handles DVBv3 ioctl's, it needs those
definitions:

    fs/compat_ioctl.c:1345: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_parameters’
    fs/compat_ioctl.c:1345: error: array type has incomplete element type
    fs/compat_ioctl.c:1345: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_parameters’
    fs/compat_ioctl.c:1345: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_parameters’
    fs/compat_ioctl.c:1345: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_parameters’
    fs/compat_ioctl.c:1345: error: array type has incomplete element type
    fs/compat_ioctl.c:1345: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_parameters’
    fs/compat_ioctl.c:1345: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_parameters’
    fs/compat_ioctl.c:1345: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_parameters’
    fs/compat_ioctl.c:1345: error: array type has incomplete element type
    fs/compat_ioctl.c:1345: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_parameters’
    fs/compat_ioctl.c:1345: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_parameters’
    fs/compat_ioctl.c:1345: error: initializer element is not constant
    fs/compat_ioctl.c:1345: error: (near initialization for ‘ioctl_pointer[462]’)
    fs/compat_ioctl.c:1346: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_parameters’
    fs/compat_ioctl.c:1346: error: array type has incomplete element type
    fs/compat_ioctl.c:1346: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_parameters’
    fs/compat_ioctl.c:1346: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_parameters’
    fs/compat_ioctl.c:1346: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_parameters’
    fs/compat_ioctl.c:1346: error: array type has incomplete element type
    fs/compat_ioctl.c:1346: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_parameters’
    fs/compat_ioctl.c:1346: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_parameters’
    fs/compat_ioctl.c:1346: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_parameters’
    fs/compat_ioctl.c:1346: error: array type has incomplete element type
    fs/compat_ioctl.c:1346: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_parameters’
    fs/compat_ioctl.c:1346: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_parameters’
    fs/compat_ioctl.c:1346: error: initializer element is not constant
    fs/compat_ioctl.c:1346: error: (near initialization for ‘ioctl_pointer[463]’)
    fs/compat_ioctl.c:1347: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_event’
    fs/compat_ioctl.c:1347: error: array type has incomplete element type
    fs/compat_ioctl.c:1347: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_event’
    fs/compat_ioctl.c:1347: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_event’
    fs/compat_ioctl.c:1347: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_event’
    fs/compat_ioctl.c:1347: error: array type has incomplete element type
    fs/compat_ioctl.c:1347: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_event’
    fs/compat_ioctl.c:1347: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_event’
    fs/compat_ioctl.c:1347: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_event’
    fs/compat_ioctl.c:1347: error: array type has incomplete element type
    fs/compat_ioctl.c:1347: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_event’
    fs/compat_ioctl.c:1347: error: invalid application of ‘sizeof’ to incomplete type ‘struct dvb_frontend_event’
    fs/compat_ioctl.c:1347: error: initializer element is not constant
    fs/compat_ioctl.c:1347: error: (near initialization for ‘ioctl_pointer[464]’)
Reported-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

A few drivers don't have .delsys. Add it, in order to allow
future patches for dvb_frontend.c to not use info.type.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Just like set_frontend, use the dvb cache properties for get_frontend.
This is more consistent, as both functions are now symetric. Also,
at the places get_frontend is called, it makes sense to update the
cache.

Most of this patch were generated by this small perl script:

	while (<>) { $file .= $_; }
	if ($file =~ m/\.get_frontend\s*=\s*([\d\w_]+)/) {
		my $get = $1;
		$file =~ s/($get)(\s*\([^\,\)]+)\,\s*struct\s+dtv_frontend_properties\s*\*\s*([_\d\w]+)\)\s*\{/\1\2)\n{\n\tstruct dtv_frontend_properties *\3 = &fe->dtv_property_cache;/g;
	}
	print $file;

Of course, the changes at dvb_frontend.[ch] were made by hand,
as well as the changes on a few other places, where get_frontend()
is called internally inside the driver.

On some places, get_frontend() were just a void function. Those
occurrences were removed, as the DVB core handles such cases.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

On several places inside dvb_frontend, only the DVBv3 parameters
were updated. Change it to be sure that, on all places, the DVBv5
parameters will be changed instead.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Before this patch, a query for the delivery systems were
returned SYS_UNDEFINED.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Now that all frontends are implementing DVBv5, don't export the
DVBv3 specific stuff to the drivers. Only the core should be
aware of that, as it will keep providing DVBv3 backward compatibility.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

The cx23885-dvb driver has a dirty hack:
	1) it hooks the DVBv3 legacy call to FE_SET_FRONTEND;
	2) it uses internally the DVBv3 struct to decide some
	   configs.

Replace it by a change during the gate control. This will
likely work, but requires testing. Anyway, the current way
will break, as soon as we stop copying data for DVBv3 for
pure DVBv5 calls.

Compile-tested only.

Cc: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Every frontend now uses DVBv5 way. So, let's not use the DVBv3
macros internally anymore.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Now that everybody is talking DVBv5 API dialect, using this
DVBv3 macro internally is not ok.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

This callback is not used anywhere. Maybe it were used in the
past to optimize the custom algo, but, as it is not used anymore,
let's just remove it.

If later needed, some patch may re-add it with a proper
implementation.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Just like the other DVB algorithms, drivers should use the DVBv5
way to retrieve parameters: via the cache struct.

Actually, several drivers were partially using the DVBv3 struct
and partially using the DVBv5 way, with is confusing and may
lead into troubles.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

As all parameters are passed via DVBv5 to the frontends, there's
no need to pass them again via fops. Also, most drivers weren't using
it anyway. So, instead, just pass a parameter to indicate if the
hardware algorithm wants the driver to re-tune or not.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

In the past, dvb_frontent_parameters were passed inside the
struct where get_tuner_settings should store their result.

This is not needed anymore, as all parameters needed are stored
already at the fe property cache. So, use it, where needed.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Now that all drivers were converted, we can get rid of those
emulation calls.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Instead of using dvb_frontend_parameters struct, that were
designed for a subset of the supported standards, use the DVBv5
cache information.

Also, fill the supported delivery systems at dvb_frontend_ops
struct.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Instead of using dvb_frontend_parameters struct, that were
designed for a subset of the supported standards, use the DVBv5
cache information.

Also, fill the supported delivery systems at dvb_frontend_ops
struct.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Instead of using dvb_frontend_parameters struct, that were
designed for a subset of the supported standards, use the DVBv5
cache information.

Also, fill the supported delivery systems at dvb_frontend_ops
struct.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Instead of using dvb_frontend_parameters struct, that were
designed for a subset of the supported standards, use the DVBv5
cache information.

Also, fill the supported delivery systems at dvb_frontend_ops
struct.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Instead of using dvb_frontend_parameters struct, that were
designed for a subset of the supported standards, use the DVBv5
cache information.

Also, fill the supported delivery systems at dvb_frontend_ops
struct.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Instead of using dvb_frontend_parameters struct, that were
designed for a subset of the supported standards, use the DVBv5
cache information.

Also, fill the supported delivery systems at dvb_frontend_ops
struct.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Instead of using dvb_frontend_parameters struct, that were
designed for a subset of the supported standards, use the DVBv5
cache information.

Also, fill the supported delivery systems at dvb_frontend_ops
struct.

Cc: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Instead of using dvb_frontend_parameters struct, that were
designed for a subset of the supported standards, use the DVBv5
cache information.

Also, fill the supported delivery systems at dvb_frontend_ops
struct.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Instead of using dvb_frontend_parameters struct, that were
designed for a subset of the supported standards, use the DVBv5
cache information.

Also, fill the supported delivery systems at dvb_frontend_ops
struct.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Instead of using dvb_frontend_parameters struct, that were
designed for a subset of the supported standards, use the DVBv5
cache information.

Also, fill the supported delivery systems at dvb_frontend_ops
struct.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Instead of using dvb_frontend_parameters struct, that were
designed for a subset of the supported standards, use the DVBv5
cache information.

Also, fill the supported delivery systems at dvb_frontend_ops
struct.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Instead of using dvb_frontend_parameters struct, that were
designed for a subset of the supported standards, use the DVBv5
cache information.

Also, fill the supported delivery systems at dvb_frontend_ops
struct.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Instead of using dvb_frontend_parameters struct, that were
designed for a subset of the supported standards, use the DVBv5
cache information.

Also, fill the supported delivery systems at dvb_frontend_ops
struct.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Instead of using dvb_frontend_parameters struct, that were
designed for a subset of the supported standards, use the DVBv5
cache information.

Also, fill the supported delivery systems at dvb_frontend_ops
struct.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Instead of using dvb_frontend_parameters struct, that were
designed for a subset of the supported standards, use the DVBv5
cache information.

Also, fill the supported delivery systems at dvb_frontend_ops
struct.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Instead of using dvb_frontend_parameters struct, that were
designed for a subset of the supported standards, use the DVBv5
cache information.

Also, fill the supported delivery systems at dvb_frontend_ops
struct.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Instead of using dvb_frontend_parameters struct, that were
designed for a subset of the supported standards, use the DVBv5
cache information.

Also, fill the supported delivery systems at dvb_frontend_ops
struct.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>