xref: /OK3568_Linux_fs/kernel/Documentation/userspace-api/media/dvb/fe-dishnetwork-send-legacy-cmd.rst (revision 4882a59341e53eb6f0b4789bf948001014eff981)
1*4882a593Smuzhiyun.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
2*4882a593Smuzhiyun.. c:namespace:: DTV.fe
3*4882a593Smuzhiyun
4*4882a593Smuzhiyun.. _FE_DISHNETWORK_SEND_LEGACY_CMD:
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun******************************
7*4882a593SmuzhiyunFE_DISHNETWORK_SEND_LEGACY_CMD
8*4882a593Smuzhiyun******************************
9*4882a593Smuzhiyun
10*4882a593SmuzhiyunName
11*4882a593Smuzhiyun====
12*4882a593Smuzhiyun
13*4882a593SmuzhiyunFE_DISHNETWORK_SEND_LEGACY_CMD
14*4882a593Smuzhiyun
15*4882a593SmuzhiyunSynopsis
16*4882a593Smuzhiyun========
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun.. c:macro:: FE_DISHNETWORK_SEND_LEGACY_CMD
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun``int ioctl(int fd, FE_DISHNETWORK_SEND_LEGACY_CMD, unsigned long cmd)``
21*4882a593Smuzhiyun
22*4882a593SmuzhiyunArguments
23*4882a593Smuzhiyun=========
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun``fd``
26*4882a593Smuzhiyun    File descriptor returned by :c:func:`open()`.
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun``cmd``
29*4882a593Smuzhiyun    Sends the specified raw cmd to the dish via DISEqC.
30*4882a593Smuzhiyun
31*4882a593SmuzhiyunDescription
32*4882a593Smuzhiyun===========
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun.. warning::
35*4882a593Smuzhiyun   This is a very obscure legacy command, used only at stv0299
36*4882a593Smuzhiyun   driver. Should not be used on newer drivers.
37*4882a593Smuzhiyun
38*4882a593SmuzhiyunIt provides a non-standard method for selecting Diseqc voltage on the
39*4882a593Smuzhiyunfrontend, for Dish Network legacy switches.
40*4882a593Smuzhiyun
41*4882a593SmuzhiyunAs support for this ioctl were added in 2004, this means that such
42*4882a593Smuzhiyundishes were already legacy in 2004.
43*4882a593Smuzhiyun
44*4882a593SmuzhiyunReturn Value
45*4882a593Smuzhiyun============
46*4882a593Smuzhiyun
47*4882a593SmuzhiyunOn success 0 is returned.
48*4882a593Smuzhiyun
49*4882a593SmuzhiyunOn error -1 is returned, and the ``errno`` variable is set
50*4882a593Smuzhiyunappropriately.
51*4882a593Smuzhiyun
52*4882a593SmuzhiyunGeneric error codes are described at the
53*4882a593Smuzhiyun:ref:`Generic Error Codes <gen-errors>` chapter.
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