Documentation/userspace-api/media/dvb/ca.rst

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.. document under the terms of the GNU Free Documentation License,
.. Version 1.1 or any later version published by the Free Software
.. Foundation, with no Invariant Sections, no Front-Cover Texts
.. and no Back-Cover Texts. A copy of the license is included at
.. Documentation/userspace-api/media/fdl-appendix.rst.
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.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections

.. _dvb_ca:

####################
Digital TV CA Device
####################

The Digital TV CA device controls the conditional access hardware. It
can be accessed through ``/dev/dvb/adapter?/ca?``. Data types and and ioctl
definitions can be accessed by including ``linux/dvb/ca.h`` in your
application.

.. note::

   There are three ioctls at this API that aren't documented:
   :ref:`CA_GET_MSG`, :ref:`CA_SEND_MSG` and :ref:`CA_SET_DESCR`.
   Documentation for them are welcome.

.. toctree::
    :maxdepth: 1

    ca_data_types
    ca_function_calls
    ca_high_level