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54f38fcae5
Since 2017, there is an space reserved for userspace API,
created by changeset 1d596dee38 ("docs: Create a user-space API guide").
As the media subsystem was one of the first subsystems to use
Sphinx, until this patch, we were keeping things on a separate
place.
Let's just use the new location, as having all uAPI altogether
will likely make things easier for developers.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
63 lines
1.5 KiB
ReStructuredText
63 lines
1.5 KiB
ReStructuredText
.. Permission is granted to copy, distribute and/or modify this
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.. document under the terms of the GNU Free Documentation License,
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.. Version 1.1 or any later version published by the Free Software
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.. Foundation, with no Invariant Sections, no Front-Cover Texts
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.. and no Back-Cover Texts. A copy of the license is included at
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.. Documentation/userspace-api/media/fdl-appendix.rst.
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..
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.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
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.. _FE_DISHNETWORK_SEND_LEGACY_CMD:
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******************************
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FE_DISHNETWORK_SEND_LEGACY_CMD
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******************************
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Name
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====
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FE_DISHNETWORK_SEND_LEGACY_CMD
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Synopsis
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========
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.. c:function:: int ioctl(int fd, FE_DISHNETWORK_SEND_LEGACY_CMD, unsigned long cmd)
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:name: FE_DISHNETWORK_SEND_LEGACY_CMD
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Arguments
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=========
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``fd``
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File descriptor returned by :c:func:`open() <dvb-fe-open>`.
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``cmd``
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Sends the specified raw cmd to the dish via DISEqC.
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Description
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===========
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.. warning::
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This is a very obscure legacy command, used only at stv0299
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driver. Should not be used on newer drivers.
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It provides a non-standard method for selecting Diseqc voltage on the
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frontend, for Dish Network legacy switches.
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As support for this ioctl were added in 2004, this means that such
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dishes were already legacy in 2004.
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Return Value
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============
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On success 0 is returned.
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On error -1 is returned, and the ``errno`` variable is set
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appropriately.
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Generic error codes are described at the
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:ref:`Generic Error Codes <gen-errors>` chapter.
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