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+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.ca
+
+.. _CA_RESET:
+
+========
+CA_RESET
+========
+
+Name
+----
+
+CA_RESET
+
+Synopsis
+--------
+
+.. c:macro:: CA_RESET
+
+``int ioctl(fd, CA_RESET)``
+
+Arguments
+---------
+
+``fd``
+  File descriptor returned by a previous call to :c:func:`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.