[vdr] SV: CAM support, was Improved CAM support in VDR

[Tomas Prybil <tomas.prybil@copper.se>]

First of all Klaus thanks again for your tremendous effort regarding the VDR
software!!

My vdr installation has been sleeping for quite some time because of the CAM
problems. Here in Scandinavia almost all channels are encrypted and now I
really look forward to use my vdr again!

However my installation doesn't really work.

Currently I have the following config:
Kernel 2.4.10
Technotrend DVB-S Rev 1.5
CAM card "holder" Rev 1.6
linux-dvb.2003-01-08-ci-ll driver
vdr-1.1.21

The setup doesn't detect my CAM modules. I've tested both the Conax and
Viacess but the only thing I get is the initial handshake --> 00 01 82 01 01
but no response :( Normally they work in my Nokia box.

Any ideas?

/t
-----Ursprungligt meddelande-----
Från: Klaus Schmidinger [mailto:Klaus.Schmidinger@cadsoft.de] 
Skickat: den 10 januari 2003 14:42
Till: vdr@linuxtv.org
Ämne: [vdr] Improved CAM support in VDR

Originally I intended to finish up VDR version 1.2.0 over the
Christmas holidays, but then I changed my mind and decided to
take a look at the CAM problem. As we all know the CAM support in the
driver is not very good, and since all that was done in the firmware
there was no chance anybody could fix this without access to the
firmware source.

Meanwile there is a new firmware version coming up that has all CAM
support removed from it, except for the basic "Link Layer" protocol,
which implements only the very basic communication between an application
and the CAM. All actual CAM handling can thus be done in the application.

Using this new firmware I implemented CAM support into VDR, which is now
available in version 1.1.21 (see my other posting announcing this new
version). All CAM specific code can be found in the new files VDR/ci.[hc].

At startup VDR tries to detect the CAMs and reports them in the log file.
Since I only have one CAM I can't guarantee that it will work with several
DVB cards using CAMs, but I would expect that to work. What will most likely
not work yet is when more than one CAM is inserted into the same DVB card
(that will work as soon as I implement handling the slots of a CAM interface
separately). For now please insert only _one_ CAM into each DVB card, and
use slot 0 (in case your CAM interface has two slots). On the standard
CAM interfaces that can be attached to the DVB-S cards the slot 0 is the
one that's closest to the printed circuit board.

I have also only been able to test this with my Irdeto AllCAM. Whether or
not it will work with other CAMs, we'll have to see. The important thing
is that now, at last, we can help ourselves with this :-)

To enter the CAM menu, go to the Setup/CICAM page and press the red button
on the entry of your CAM. Note that the green button ("Reset") is not yet
functional. Also, give the CAM some 15 seconds before trying to enter the
menu for the first time (see "Workarounds" in VDR/ci.c).

As far as I can see this new CAM support also fixes the problem where only
the previously active channel could be decrypted after replaying a recording
on the DVB card holding the CAM. At least here on my system I was able to
switch happily between encrypted channels, then replay something (while
still
on an encrypted channel) and after stopping the replay I was again able to
switch between any channels :-)

If CAM support doesn't work "out of the box" with your CAM or subscription,
you may want to set the variables DumpTPDUDataTransfer and DebugProtocol
in VDR/ci.c to 'true'. This will write the entire CAM communication to
stdout, so you can compare it to the specs given in the document "EN 50221".
If you manage to get other CAMs and/or subscriptions to work with VDR's new
CAM support, please provide the necessary patches.

I sincerely hope that this work will enable all pay tv viewers to use VDR
together with their subscriptions (provided there is a CAM available for
them). If it works for you, please let me know the exact type of CAM and
subscription you use, so that I can set up a list of "known to work" CAMs.

WARNING: At the moment the CAM menus don't have a timeout function yet, so
=======  if such a menu stays open, timers may not start as expected!
         It may also happen that an "Insert smartcard" menu will popup
         unexpectedly, when the EPG scan comes across an encrypted channel.
         Finally, any "Enquiry" CAM menus (those that require a user input)
         will be displayed, but don't accept any real input yet.
         I'm still working on that...

         Also, when you do a replay on the DVB card that contains the CAM,
         things may react rather sluggish. Presumably there is a problem in
the
         driver/firmware that causes replay control to be influenced by the
         CAM connection. I hope Holger will find a fix for this before he
         adds the new firmware to the official driver CVS.

Have fun

Klaus
-- 
_______________________________________________________________

Klaus Schmidinger                       Phone: +49-8635-6989-10
CadSoft Computer GmbH                   Fax:   +49-8635-6989-40
Hofmark 2                               Email:   kls@cadsoft.de
D-84568 Pleiskirchen, Germany           URL:     www.cadsoft.de
_______________________________________________________________


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