The DVB frontend API got bitrotten. Update it. Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx> diff --git a/Documentation/DocBook/media/dvb/frontend.xml b/Documentation/DocBook/media/dvb/frontend.xml index 956b8f6882e0..98443c4c2818 100644 --- a/Documentation/DocBook/media/dvb/frontend.xml +++ b/Documentation/DocBook/media/dvb/frontend.xml @@ -1,30 +1,42 @@ <title>DVB Frontend API</title> -<para>The DVB frontend device controls the tuner and DVB demodulator -hardware. It can be accessed through <emphasis -role="bold">/dev/dvb/adapter0/frontend0</emphasis>. Data types and and -ioctl definitions can be accessed by including <emphasis -role="bold">linux/dvb/frontend.h</emphasis> in your application.</para> +<para>The DVB frontend API was designed to support three types of delivery systems:</para> +<itemizedlist> + <listitem>Terrestrial systems: DVB-T, DVB-T2, ATSC, ATSC M/H, ISDB-T, DVB-H, DTMB, CMMB</listitem> + <listitem>Cable systems: DVB-C Annex A/C, ClearQAM (DVB-C Annex B), ISDB-C</listitem> + <listitem>Satellital systems: DVB-S, DVB-S2, DVB Turbo, ISDB-S, DSS</listitem> +</itemizedlist> +<para>The DVB frontend controls several sub-devices including:</para> +<itemizedlist> + <listitem>Tuner</listitem>, + <listitem>Digital TV demodulator</listitem> + <listitem>Low noise amplifier (LNA)</listitem> + <listitem>Satellite Equipment Control (SEC) hardware (only for Satellite).</listitem> +</itemizedlist> +<para>The frontend can be accessed through + <emphasis role="bold">/dev/dvb/adapter?/frontend?</emphasis>. Data types and + ioctl definitions can be accessed by including + <emphasis role="bold">linux/dvb/frontend.h</emphasis> in your application. +</para> -<para>DVB frontends come in three varieties: DVB-S (satellite), DVB-C -(cable) and DVB-T (terrestrial). Transmission via the internet (DVB-IP) -is not yet handled by this API but a future extension is possible. For -DVB-S the frontend device also supports satellite equipment control -(SEC) via DiSEqC and V-SEC protocols. The DiSEqC (digital SEC) -specification is available from +<para>NOTE: Transmission via the internet (DVB-IP) + is not yet handled by this API but a future extension is possible.</para> +<para>On Satellital systems, the API support for the Satellite Equipment Control + (SEC) allows to power control and to send/receive signals to control the + antenna subsystem, selecting the polarization and choosing the Intermediate + Frequency IF) of the Low Noise Block Converter Feed Horn (LNBf). It + supports the DiSEqC and V-SEC protocols. The DiSEqC (digital SEC) +specification is available at <ulink url="http://www.eutelsat.com/satellites/4_5_5.html";>Eutelsat</ulink>.</para> -<para>Note that the DVB API may also be used for MPEG decoder-only PCI -cards, in which case there exists no frontend device.</para> - <section id="frontend_types"> <title>Frontend Data Types</title> <section id="fe-type-t"> <title>Frontend type</title> -<para>For historical reasons, frontend types are named by the type of modulation used in -transmission. The fontend types are given by fe_type_t type, defined as:</para> +<para>For historical reasons, frontend types are named by the type of modulation + used in transmission. The fontend types are given by fe_type_t type, defined as:</para> <table pgwide="1" frame="none" id="fe-type"> <title>Frontend types</title> -- 2.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
