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Commit 5b233e1a authored by Mauro Carvalho Chehab's avatar Mauro Carvalho Chehab
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[media] DocBook: improve documentation for FE_READ_STATUS 

Move the ioctl and enum fe_status to a separate xml file and
put it into a better format.
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent 002563e9
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Showing with 113 additions and 109 deletions
Documentation/DocBook/media/dvb/frontend.xml
View file @ 5b233e1a
......@@ -33,12 +33,21 @@ specification is available at
<section id="query-dvb-frontend-info">
<title>Querying frontend information</title>
<para>Information about the frontend ca be queried with
<para>Information about the frontend can be queried with
<link linkend="FE_GET_INFO">FE_GET_INFO</link>.</para>
</section>
&sub-frontend_get_info;
<section id="dvb-fe-read-status">
<title>Querying frontend status</title>
<para>Information about the frontend tuner locking status can be queried with
<link linkend="FE_READ_STATUS">FE_READ_STATUS</link>.</para>
</section>
&sub-frontend_read_status;
<section id="dvb-diseqc-master-cmd">
<title>diseqc master command</title>
......@@ -109,51 +118,6 @@ spec.</para>
<para></para>
</section>
<section id="fe-status-t">
<title>frontend status</title>
<para>Several functions of the frontend device use the fe_status data type defined
by</para>
<programlisting>
typedef enum fe_status {
FE_HAS_SIGNAL = 0x01,
FE_HAS_CARRIER = 0x02,
FE_HAS_VITERBI = 0x04,
FE_HAS_SYNC = 0x08,
FE_HAS_LOCK = 0x10,
FE_TIMEDOUT = 0x20,
FE_REINIT = 0x40,
} fe_status_t;
</programlisting>
<para>to indicate the current state and/or state changes of the frontend hardware:
</para>
<informaltable><tgroup cols="2"><tbody>
<row>
<entry align="char">FE_HAS_SIGNAL</entry>
<entry align="char">The frontend has found something above the noise level</entry>
</row><row>
<entry align="char">FE_HAS_CARRIER</entry>
<entry align="char">The frontend has found a DVB signal</entry>
</row><row>
<entry align="char">FE_HAS_VITERBI</entry>
<entry align="char">The frontend FEC inner coding (Viterbi, LDPC or other inner code) is stable</entry>
</row><row>
<entry align="char">FE_HAS_SYNC</entry>
<entry align="char">Synchronization bytes was found</entry>
</row><row>
<entry align="char">FE_HAS_LOCK</entry>
<entry align="char">The DVB were locked and everything is working</entry>
</row><row>
<entry align="char">FE_TIMEDOUT</entry>
<entry align="char">no lock within the last about 2 seconds</entry>
</row><row>
<entry align="char">FE_REINIT</entry>
<entry align="char">The frontend was reinitialized, application is
recommended to reset DiSEqC, tone and parameters</entry>
</row>
</tbody></tgroup></informaltable>
</section>
<section id="fe-spectral-inversion-t">
<title>frontend spectral inversion</title>
<para>The Inversion field can take one of these values:
......@@ -437,69 +401,6 @@ typedef enum fe_hierarchy {
</row></tbody></tgroup></informaltable>
</section>
<section id="FE_READ_STATUS">
<title>FE_READ_STATUS</title>
<para>DESCRIPTION
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
align="char">
<para>This ioctl call returns status information about the front-end. This call only
requires read-only access to the device.</para>
</entry>
</row></tbody></tgroup></informaltable>
<para>SYNOPSIS
</para>
<informaltable><tgroup cols="1"><tbody><row><entry
align="char">
<para>int ioctl(int fd, int request = <link linkend="FE_READ_STATUS">FE_READ_STATUS</link>,
fe_status_t &#x22C6;status);</para>
</entry>
</row></tbody></tgroup></informaltable>
<para>PARAMETERS
</para>
<informaltable><tgroup cols="2"><tbody><row><entry
align="char">
<para>int fd</para>
</entry><entry
align="char">
<para>File descriptor returned by a previous call to open().</para>
</entry>
</row><row><entry
align="char">
<para>int request</para>
</entry><entry
align="char">
<para>Equals <link linkend="FE_READ_STATUS">FE_READ_STATUS</link> for this command.</para>
</entry>
</row><row><entry
align="char">
<para>struct fe_status_t
*status</para>
</entry><entry
align="char">
<para>Points to the location where the front-end status word is
to be stored.</para>
</entry>
</row></tbody></tgroup></informaltable>
<para>RETURN VALUE</para>
<informaltable><tgroup cols="2"><tbody><row><entry
align="char">
<para>EBADF</para>
</entry><entry
align="char">
<para>fd is not a valid open file descriptor.</para>
</entry>
</row><row><entry
align="char">
<para>EFAULT</para>
</entry><entry
align="char">
<para>status points to invalid address.</para>
</entry>
</row></tbody></tgroup></informaltable>
</section>
<section id="FE_DISEQC_RESET_OVERLOAD">
<title>FE_DISEQC_RESET_OVERLOAD</title>
......
Documentation/DocBook/media/dvb/frontend_read_status.xml 0 → 100644
View file @ 5b233e1a
<refentry id="FE_READ_STATUS">
<refmeta>
<refentrytitle>ioctl FE_READ_STATUS</refentrytitle>
&manvol;
</refmeta>
<refnamediv>
<refname>FE_READ_STATUS</refname>
<refpurpose>Returns status information about the front-end. This call only
requires read-only access to the device</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcprototype>
<funcdef>int <function>ioctl</function></funcdef>
<paramdef>int <parameter>fd</parameter></paramdef>
<paramdef>int <parameter>request</parameter></paramdef>
<paramdef>&fe-status; *<parameter>argp</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Arguments</title>
<variablelist>
<varlistentry>
<term><parameter>fd</parameter></term>
<listitem>
<para>&fd;</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>request</parameter></term>
<listitem>
<para>FE_READ_STATUS</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>argp</parameter></term>
<listitem>
<para>pointer to &fe-status;</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Description</title>
<para>All DVB frontend devices support the
<constant>FE_READ_STATUS</constant> ioctl. It is used to check about the
locking status of the frontend after being tuned. The ioctl takes a
pointer to a 16-bits number where the status will be written.
&return-value-dvb;.
</para>
</refsect1>
<section id="fe-status-t">
<title>enum fe_status</title>
<para>The enum fe_status is used to indicate the current state
and/or state changes of the frontend hardware.</para>
<table pgwide="1" frame="none" id="fe-status">
<title>enum fe_status</title>
<tgroup cols="2">
&cs-def;
<thead>
<row>
<entry>ID</entry>
<entry>Description</entry>
</row>
</thead>
<tbody valign="top">
<row>
<entry align="char">FE_HAS_SIGNAL</entry>
<entry align="char">The frontend has found something above the noise level</entry>
</row><row>
<entry align="char">FE_HAS_CARRIER</entry>
<entry align="char">The frontend has found a DVB signal</entry>
</row><row>
<entry align="char">FE_HAS_VITERBI</entry>
<entry align="char">The frontend FEC inner coding (Viterbi, LDPC or other inner code) is stable</entry>
</row><row>
<entry align="char">FE_HAS_SYNC</entry>
<entry align="char">Synchronization bytes was found</entry>
</row><row>
<entry align="char">FE_HAS_LOCK</entry>
<entry align="char">The DVB were locked and everything is working</entry>
</row><row>
<entry align="char">FE_TIMEDOUT</entry>
<entry align="char">no lock within the last about 2 seconds</entry>
</row><row>
<entry align="char">FE_REINIT</entry>
<entry align="char">The frontend was reinitialized, application is
recommended to reset DiSEqC, tone and parameters</entry>
</row>
</tbody>
</tgroup>
</table>
</section>
</refentry>
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