.. Permission is granted to copy, distribute and/or modify this
.. 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/media/uapi/fdl-appendix.rst.
..
.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections

.. _CA_RESET:

========
CA_RESET
========

Name
----

CA_RESET


Synopsis
--------

.. c:function:: int ioctl(fd, CA_RESET)
    :name: CA_RESET


Arguments
---------

``fd``
  File descriptor returned by a previous call to :c:func:`open() <cec-open>`.

Description
-----------

Puts the Conditional Access hardware on its initial state. It should
be called before start using the CA hardware.


Return Value
------------

On success 0 is returned.

On error -1 is returned, and the ``errno`` variable is set
appropriately.

Generic error codes are described at the
:ref:`Generic Error Codes <gen-errors>` chapter.