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- .. SPDX-License-Identifier: GPL-2.0
- Digital TV Conditional Access Interface
- =======================================
- .. note::
- This documentation is outdated.
- This document describes the usage of the high level CI API as
- in accordance to the Linux DVB API. This is a not a documentation for the,
- existing low level CI API.
- .. note::
- For the Twinhan/Twinhan clones, the dst_ca module handles the CI
- hardware handling. This module is loaded automatically if a CI
- (Common Interface, that holds the CAM (Conditional Access Module)
- is detected.
- ca_zap
- ~~~~~~
- A userspace application, like ``ca_zap`` is required to handle encrypted
- MPEG-TS streams.
- The ``ca_zap`` userland application is in charge of sending the
- descrambling related information to the Conditional Access Module (CAM).
- This application requires the following to function properly as of now.
- a) Tune to a valid channel, with szap.
- eg: $ szap -c channels.conf -r "TMC" -x
- b) a channels.conf containing a valid PMT PID
- eg: TMC:11996:h:0:27500:278:512:650:321
- here 278 is a valid PMT PID. the rest of the values are the
- same ones that szap uses.
- c) after running a szap, you have to run ca_zap, for the
- descrambler to function,
- eg: $ ca_zap channels.conf "TMC"
- d) Hopefully enjoy your favourite subscribed channel as you do with
- a FTA card.
- .. note::
- Currently ca_zap, and dst_test, both are meant for demonstration
- purposes only, they can become full fledged applications if necessary.
- Cards that fall in this category
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- At present the cards that fall in this category are the Twinhan and its
- clones, these cards are available as VVMER, Tomato, Hercules, Orange and
- so on.
- CI modules that are supported
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- The CI module support is largely dependent upon the firmware on the cards
- Some cards do support almost all of the available CI modules. There is
- nothing much that can be done in order to make additional CI modules
- working with these cards.
- Modules that have been tested by this driver at present are
- (1) Irdeto 1 and 2 from SCM
- (2) Viaccess from SCM
- (3) Dragoncam
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