| <section id="frontend_legacy_types"> |
| <title>Frontend Legacy 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> |
| |
| <table pgwide="1" frame="none" id="fe-type"> |
| <title>Frontend types</title> |
| <tgroup cols="3"> |
| &cs-def; |
| <thead> |
| <row> |
| <entry>fe_type</entry> |
| <entry>Description</entry> |
| <entry><link linkend="DTV-DELIVERY-SYSTEM">DTV_DELIVERY_SYSTEM</link> equivalent type</entry> |
| </row> |
| </thead> |
| <tbody valign="top"> |
| <row> |
| <entry id="FE-QPSK"><constant>FE_QPSK</constant></entry> |
| <entry>For DVB-S standard</entry> |
| <entry><constant>SYS_DVBS</constant></entry> |
| </row> |
| <row> |
| <entry id="FE-QAM"><constant>FE_QAM</constant></entry> |
| <entry>For DVB-C annex A standard</entry> |
| <entry><constant>SYS_DVBC_ANNEX_A</constant></entry> |
| </row> |
| <row> |
| <entry id="FE-OFDM"><constant>FE_OFDM</constant></entry> |
| <entry>For DVB-T standard</entry> |
| <entry><constant>SYS_DVBT</constant></entry> |
| </row> |
| <row> |
| <entry id="FE-ATSC"><constant>FE_ATSC</constant></entry> |
| <entry>For ATSC standard (terrestrial) or for DVB-C Annex B (cable) used in US.</entry> |
| <entry><constant>SYS_ATSC</constant> (terrestrial) or <constant>SYS_DVBC_ANNEX_B</constant> (cable)</entry> |
| </row> |
| </tbody></tgroup></table> |
| |
| <para>Newer formats like DVB-S2, ISDB-T, ISDB-S and DVB-T2 are not described at the above, as they're |
| supported via the new <link linkend="FE_GET_PROPERTY">FE_GET_PROPERTY/FE_GET_SET_PROPERTY</link> ioctl's, using the <link linkend="DTV-DELIVERY-SYSTEM">DTV_DELIVERY_SYSTEM</link> parameter. |
| </para> |
| |
| <para>In the old days, &dvb-frontend-info; used to contain |
| <constant>fe_type_t</constant> field to indicate the delivery systems, |
| filled with either FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC. While this is |
| still filled to keep backward compatibility, the usage of this |
| field is deprecated, as it can report just one delivery system, but some |
| devices support multiple delivery systems. Please use |
| <link linkend="DTV-ENUM-DELSYS">DTV_ENUM_DELSYS</link> instead. |
| </para> |
| <para>On devices that support multiple delivery systems, |
| &dvb-frontend-info;::<constant>fe_type_t</constant> is filled with the |
| currently standard, as selected by the last call to |
| <link linkend="FE_GET_PROPERTY">FE_SET_PROPERTY</link> |
| using the &DTV-DELIVERY-SYSTEM; property.</para> |
| </section> |
| |
| <section id="fe-bandwidth-t"> |
| <title>Frontend bandwidth</title> |
| |
| <table pgwide="1" frame="none" id="fe-bandwidth"> |
| <title>enum fe_bandwidth</title> |
| <tgroup cols="2"> |
| &cs-def; |
| <thead> |
| <row> |
| <entry>ID</entry> |
| <entry>Description</entry> |
| </row> |
| </thead> |
| <tbody valign="top"> |
| <row> |
| <entry id="BANDWIDTH-AUTO"><constant>BANDWIDTH_AUTO</constant></entry> |
| <entry>Autodetect bandwidth (if supported)</entry> |
| </row><row> |
| <entry id="BANDWIDTH-1-712-MHZ"><constant>BANDWIDTH_1_712_MHZ</constant></entry> |
| <entry>1.712 MHz</entry> |
| </row><row> |
| <entry id="BANDWIDTH-5-MHZ"><constant>BANDWIDTH_5_MHZ</constant></entry> |
| <entry>5 MHz</entry> |
| </row><row> |
| <entry id="BANDWIDTH-6-MHZ"><constant>BANDWIDTH_6_MHZ</constant></entry> |
| <entry>6 MHz</entry> |
| </row><row> |
| <entry id="BANDWIDTH-7-MHZ"><constant>BANDWIDTH_7_MHZ</constant></entry> |
| <entry>7 MHz</entry> |
| </row><row> |
| <entry id="BANDWIDTH-8-MHZ"><constant>BANDWIDTH_8_MHZ</constant></entry> |
| <entry>8 MHz</entry> |
| </row><row> |
| <entry id="BANDWIDTH-10-MHZ"><constant>BANDWIDTH_10_MHZ</constant></entry> |
| <entry>10 MHz</entry> |
| </row> |
| </tbody> |
| </tgroup> |
| </table> |
| |
| </section> |
| |
| <section id="dvb-frontend-parameters"> |
| <title>frontend parameters</title> |
| <para>The kind of parameters passed to the frontend device for tuning depend on |
| the kind of hardware you are using.</para> |
| <para>The struct <constant>dvb_frontend_parameters</constant> uses an |
| union with specific per-system parameters. However, as newer delivery systems |
| required more data, the structure size weren't enough to fit, and just |
| extending its size would break the existing applications. So, those parameters |
| were replaced by the usage of <link linkend="FE_GET_PROPERTY"> |
| <constant>FE_GET_PROPERTY/FE_SET_PROPERTY</constant></link> ioctl's. The |
| new API is flexible enough to add new parameters to existing delivery systems, |
| and to add newer delivery systems.</para> |
| <para>So, newer applications should use <link linkend="FE_GET_PROPERTY"> |
| <constant>FE_GET_PROPERTY/FE_SET_PROPERTY</constant></link> instead, in |
| order to be able to support the newer System Delivery like DVB-S2, DVB-T2, |
| DVB-C2, ISDB, etc.</para> |
| <para>All kinds of parameters are combined as an union in the FrontendParameters structure: |
| <programlisting> |
| struct dvb_frontend_parameters { |
| uint32_t frequency; /⋆ (absolute) frequency in Hz for QAM/OFDM ⋆/ |
| /⋆ intermediate frequency in kHz for QPSK ⋆/ |
| &fe-spectral-inversion-t; inversion; |
| union { |
| struct dvb_qpsk_parameters qpsk; |
| struct dvb_qam_parameters qam; |
| struct dvb_ofdm_parameters ofdm; |
| struct dvb_vsb_parameters vsb; |
| } u; |
| }; |
| </programlisting></para> |
| <para>In the case of QPSK frontends the <constant>frequency</constant> field specifies the intermediate |
| frequency, i.e. the offset which is effectively added to the local oscillator frequency (LOF) of |
| the LNB. The intermediate frequency has to be specified in units of kHz. For QAM and |
| OFDM frontends the <constant>frequency</constant> specifies the absolute frequency and is given in Hz. |
| </para> |
| |
| <section id="dvb-qpsk-parameters"> |
| <title>QPSK parameters</title> |
| <para>For satellite QPSK frontends you have to use the <constant>dvb_qpsk_parameters</constant> structure:</para> |
| <programlisting> |
| struct dvb_qpsk_parameters { |
| uint32_t symbol_rate; /⋆ symbol rate in Symbols per second ⋆/ |
| &fe-code-rate-t; fec_inner; /⋆ forward error correction (see above) ⋆/ |
| }; |
| </programlisting> |
| </section> |
| |
| <section id="dvb-qam-parameters"> |
| <title>QAM parameters</title> |
| <para>for cable QAM frontend you use the <constant>dvb_qam_parameters</constant> structure:</para> |
| <programlisting> |
| struct dvb_qam_parameters { |
| uint32_t symbol_rate; /⋆ symbol rate in Symbols per second ⋆/ |
| &fe-code-rate-t; fec_inner; /⋆ forward error correction (see above) ⋆/ |
| &fe-modulation-t; modulation; /⋆ modulation type (see above) ⋆/ |
| }; |
| </programlisting> |
| </section> |
| |
| <section id="dvb-vsb-parameters"> |
| <title>VSB parameters</title> |
| <para>ATSC frontends are supported by the <constant>dvb_vsb_parameters</constant> structure:</para> |
| <programlisting> |
| struct dvb_vsb_parameters { |
| &fe-modulation-t; modulation; /⋆ modulation type (see above) ⋆/ |
| }; |
| </programlisting> |
| </section> |
| |
| <section id="dvb-ofdm-parameters"> |
| <title>OFDM parameters</title> |
| <para>DVB-T frontends are supported by the <constant>dvb_ofdm_parameters</constant> structure:</para> |
| <programlisting> |
| struct dvb_ofdm_parameters { |
| &fe-bandwidth-t; bandwidth; |
| &fe-code-rate-t; code_rate_HP; /⋆ high priority stream code rate ⋆/ |
| &fe-code-rate-t; code_rate_LP; /⋆ low priority stream code rate ⋆/ |
| &fe-modulation-t; constellation; /⋆ modulation type (see above) ⋆/ |
| &fe-transmit-mode-t; transmission_mode; |
| &fe-guard-interval-t; guard_interval; |
| &fe-hierarchy-t; hierarchy_information; |
| }; |
| </programlisting> |
| </section> |
| </section> |
| |
| <section id="dvb-frontend-event"> |
| <title>frontend events</title> |
| <programlisting> |
| struct dvb_frontend_event { |
| fe_status_t status; |
| struct dvb_frontend_parameters parameters; |
| }; |
| </programlisting> |
| </section> |
| </section> |
| |
| <section id="frontend_legacy_fcalls"> |
| <title>Frontend Legacy Function Calls</title> |
| |
| <para>Those functions are defined at DVB version 3. The support is kept in |
| the kernel due to compatibility issues only. Their usage is strongly |
| not recommended</para> |
| |
| <section id="FE_READ_BER"> |
| <title>FE_READ_BER</title> |
| <para>DESCRIPTION |
| </para> |
| <informaltable><tgroup cols="1"><tbody><row><entry |
| align="char"> |
| <para>This ioctl call returns the bit error rate for the signal currently |
| received/demodulated by the front-end. For this command, read-only access to |
| the device is sufficient.</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_BER">FE_READ_BER</link>, |
| uint32_t ⋆ber);</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_BER">FE_READ_BER</link> for this command.</para> |
| </entry> |
| </row><row><entry |
| align="char"> |
| <para>uint32_t *ber</para> |
| </entry><entry |
| align="char"> |
| <para>The bit error rate is stored into *ber.</para> |
| </entry> |
| </row></tbody></tgroup></informaltable> |
| |
| &return-value-dvb; |
| </section> |
| |
| <section id="FE_READ_SNR"> |
| <title>FE_READ_SNR</title> |
| |
| <para>DESCRIPTION |
| </para> |
| <informaltable><tgroup cols="1"><tbody><row><entry |
| align="char"> |
| <para>This ioctl call returns the signal-to-noise ratio for the signal currently received |
| by the front-end. For this command, read-only access to the device is sufficient.</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_SNR">FE_READ_SNR</link>, uint16_t |
| ⋆snr);</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_SNR">FE_READ_SNR</link> for this command.</para> |
| </entry> |
| </row><row><entry |
| align="char"> |
| <para>uint16_t *snr</para> |
| </entry><entry |
| align="char"> |
| <para>The signal-to-noise ratio is stored into *snr.</para> |
| </entry> |
| </row></tbody></tgroup></informaltable> |
| |
| &return-value-dvb; |
| </section> |
| |
| <section id="FE_READ_SIGNAL_STRENGTH"> |
| <title>FE_READ_SIGNAL_STRENGTH</title> |
| <para>DESCRIPTION |
| </para> |
| <informaltable><tgroup cols="1"><tbody><row><entry |
| align="char"> |
| <para>This ioctl call returns the signal strength value for the signal currently received |
| by the front-end. For this command, read-only access to the device is sufficient.</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_SIGNAL_STRENGTH">FE_READ_SIGNAL_STRENGTH</link>, uint16_t ⋆strength);</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_SIGNAL_STRENGTH">FE_READ_SIGNAL_STRENGTH</link> for this |
| command.</para> |
| </entry> |
| </row><row><entry |
| align="char"> |
| <para>uint16_t *strength</para> |
| </entry><entry |
| align="char"> |
| <para>The signal strength value is stored into *strength.</para> |
| </entry> |
| </row></tbody></tgroup></informaltable> |
| |
| &return-value-dvb; |
| </section> |
| |
| <section id="FE_READ_UNCORRECTED_BLOCKS"> |
| <title>FE_READ_UNCORRECTED_BLOCKS</title> |
| <para>DESCRIPTION |
| </para> |
| <informaltable><tgroup cols="1"><tbody><row><entry |
| align="char"> |
| <para>This ioctl call returns the number of uncorrected blocks detected by the device |
| driver during its lifetime. For meaningful measurements, the increment in block |
| count during a specific time interval should be calculated. For this command, |
| read-only access to the device is sufficient.</para> |
| </entry> |
| </row><row><entry |
| align="char"> |
| <para>Note that the counter will wrap to zero after its maximum count has been |
| reached.</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_UNCORRECTED_BLOCKS">FE_READ_UNCORRECTED_BLOCKS</link>, uint32_t ⋆ublocks);</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_UNCORRECTED_BLOCKS">FE_READ_UNCORRECTED_BLOCKS</link> for this |
| command.</para> |
| </entry> |
| </row><row><entry |
| align="char"> |
| <para>uint32_t *ublocks</para> |
| </entry><entry |
| align="char"> |
| <para>The total number of uncorrected blocks seen by the driver |
| so far.</para> |
| </entry> |
| </row></tbody></tgroup></informaltable> |
| |
| &return-value-dvb; |
| </section> |
| |
| <section id="FE_SET_FRONTEND"> |
| <title>FE_SET_FRONTEND</title> |
| <para>DESCRIPTION |
| </para> |
| <informaltable><tgroup cols="1"><tbody><row><entry |
| align="char"> |
| <para>This ioctl call starts a tuning operation using specified parameters. The result |
| of this call will be successful if the parameters were valid and the tuning could |
| be initiated. The result of the tuning operation in itself, however, will arrive |
| asynchronously as an event (see documentation for <link linkend="FE_GET_EVENT">FE_GET_EVENT</link> and |
| FrontendEvent.) If a new <link linkend="FE_SET_FRONTEND">FE_SET_FRONTEND</link> operation is initiated before |
| the previous one was completed, the previous operation will be aborted in favor |
| of the new one. This command requires read/write 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_SET_FRONTEND">FE_SET_FRONTEND</link>, |
| struct dvb_frontend_parameters ⋆p);</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_SET_FRONTEND">FE_SET_FRONTEND</link> for this command.</para> |
| </entry> |
| </row><row><entry |
| align="char"> |
| <para>struct |
| dvb_frontend_parameters |
| *p</para> |
| </entry><entry |
| align="char"> |
| <para>Points to parameters for tuning operation.</para> |
| </entry> |
| </row></tbody></tgroup></informaltable> |
| |
| &return-value-dvb; |
| <informaltable><tgroup cols="2"><tbody><row><entry |
| align="char"> |
| <para>EINVAL</para> |
| </entry><entry |
| align="char"> |
| <para>Maximum supported symbol rate reached.</para> |
| </entry> |
| </row></tbody></tgroup></informaltable> |
| </section> |
| |
| <section id="FE_GET_FRONTEND"> |
| <title>FE_GET_FRONTEND</title> |
| <para>DESCRIPTION |
| </para> |
| <informaltable><tgroup cols="1"><tbody><row><entry |
| align="char"> |
| <para>This ioctl call queries the currently effective frontend parameters. For this |
| command, read-only access to the device is sufficient.</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_GET_FRONTEND">FE_GET_FRONTEND</link>, |
| struct dvb_frontend_parameters ⋆p);</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_SET_FRONTEND">FE_SET_FRONTEND</link> for this command.</para> |
| </entry> |
| </row><row><entry |
| align="char"> |
| <para>struct |
| dvb_frontend_parameters |
| *p</para> |
| </entry><entry |
| align="char"> |
| <para>Points to parameters for tuning operation.</para> |
| </entry> |
| </row></tbody></tgroup></informaltable> |
| |
| &return-value-dvb; |
| <informaltable><tgroup cols="2"><tbody><row><entry |
| align="char"> |
| <para>EINVAL</para> |
| </entry><entry |
| align="char"> |
| <para>Maximum supported symbol rate reached.</para> |
| </entry> |
| </row></tbody></tgroup></informaltable> |
| |
| </section> |
| |
| <section id="FE_GET_EVENT"> |
| <title>FE_GET_EVENT</title> |
| <para>DESCRIPTION |
| </para> |
| <informaltable><tgroup cols="1"><tbody><row><entry |
| align="char"> |
| <para>This ioctl call returns a frontend event if available. If an event is not |
| available, the behavior depends on whether the device is in blocking or |
| non-blocking mode. In the latter case, the call fails immediately with errno |
| set to EWOULDBLOCK. In the former case, the call blocks until an event |
| becomes available.</para> |
| </entry> |
| </row><row><entry |
| align="char"> |
| <para>The standard Linux poll() and/or select() system calls can be used with the |
| device file descriptor to watch for new events. For select(), the file descriptor |
| should be included in the exceptfds argument, and for poll(), POLLPRI should |
| be specified as the wake-up condition. Since the event queue allocated is |
| rather small (room for 8 events), the queue must be serviced regularly to avoid |
| overflow. If an overflow happens, the oldest event is discarded from the queue, |
| and an error (EOVERFLOW) occurs the next time the queue is read. After |
| reporting the error condition in this fashion, subsequent |
| <link linkend="FE_GET_EVENT">FE_GET_EVENT</link> |
| calls will return events from the queue as usual.</para> |
| </entry> |
| </row><row><entry |
| align="char"> |
| <para>For the sake of implementation simplicity, this command requires read/write |
| 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 = QPSK_GET_EVENT, |
| struct dvb_frontend_event ⋆ev);</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_GET_EVENT">FE_GET_EVENT</link> for this command.</para> |
| </entry> |
| </row><row><entry |
| align="char"> |
| <para>struct |
| dvb_frontend_event |
| *ev</para> |
| </entry><entry |
| align="char"> |
| <para>Points to the location where the event,</para> |
| </entry> |
| </row><row><entry |
| align="char"> |
| </entry><entry |
| align="char"> |
| <para>if any, is to be stored.</para> |
| </entry> |
| </row></tbody></tgroup></informaltable> |
| |
| &return-value-dvb; |
| <informaltable><tgroup cols="2"><tbody><row><entry |
| align="char"> |
| <para>EWOULDBLOCK</para> |
| </entry><entry |
| align="char"> |
| <para>There is no event pending, and the device is in |
| non-blocking mode.</para> |
| </entry> |
| </row><row><entry |
| align="char"> |
| <para>EOVERFLOW</para> |
| </entry><entry |
| align="char"> |
| <para>Overflow in event queue - one or more events were lost.</para> |
| </entry> |
| </row></tbody></tgroup></informaltable> |
| </section> |
| |
| <section id="FE_DISHNETWORK_SEND_LEGACY_CMD"> |
| <title>FE_DISHNETWORK_SEND_LEGACY_CMD</title> |
| <para>DESCRIPTION</para> |
| <informaltable><tgroup cols="1"><tbody><row> |
| <entry align="char"> |
| <para>WARNING: This is a very obscure legacy command, used only at stv0299 driver. Should not be used on newer drivers.</para> |
| <para>It provides a non-standard method for selecting Diseqc voltage on the frontend, for Dish Network legacy switches.</para> |
| <para>As support for this ioctl were added in 2004, this means that such dishes were already legacy in 2004.</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_DISHNETWORK_SEND_LEGACY_CMD">FE_DISHNETWORK_SEND_LEGACY_CMD</link>, unsigned long cmd);</para> |
| </entry> |
| </row></tbody></tgroup></informaltable> |
| |
| <para>PARAMETERS</para> |
| <informaltable><tgroup cols="2"><tbody><row> |
| <entry align="char"> |
| <para>unsigned long cmd</para> |
| </entry> |
| <entry align="char"> |
| <para> |
| sends the specified raw cmd to the dish via DISEqC. |
| </para> |
| </entry> |
| </row></tbody></tgroup></informaltable> |
| |
| &return-value-dvb; |
| </section> |
| |
| </section> |
