+<section id="lirc_dev">
<title>LIRC Device Interface</title>
<para>lirc_dev: IR Remote Control driver registered, major 248</para>
<para>rc rc0: lirc_dev: driver ir-lirc-codec (mceusb) registered at minor = 0</para>
</blockquote>
-<para>
<para>What you should see for a chardev:</para>
<blockquote>
<para>$ ls -l /dev/lirc*</para>
<para>crw-rw---- 1 root root 248, 0 Jul 2 22:20 /dev/lirc0</para>
</blockquote>
-</para>
-
+</section>
<section id="lirc_read">
<title>LIRC read fop</title>
<para>The lircd userspace daemon reads raw IR data from the LIRC chardev. The
exact format of the data depends on what modes a driver supports, and what
mode has been selected. lircd obtains supported modes and sets the active mode
-via the ioctl interface, detailed at <xref linkend="lirc_ioctl">. The generally
+via the ioctl interface, detailed at <xref linkend="lirc_ioctl"/>. The generally
preferred mode is LIRC_MODE_MODE2, in which packets containing an int value
describing an IR signal are read from the chardev.</para>
-<para>See also <ulink url="http://www.lirc.org/html/technical.html">http://www.lirc.org/html/technical.html</> for more info.</para>
-
+<para>See also <ulink url="http://www.lirc.org/html/technical.html">http://www.lirc.org/html/technical.html</ulink> for more info.</para>
+</section>
<section id="lirc_write">
<title>LIRC write fop</title>
data must start and end with a pulse, therefore, the data must always include
an unevent number of samples. The write function must block until the data has
been transmitted by the hardware.</para>
-
+</section>
<section id="lirc_ioctl">
-<title> LIRC ioctl fop</title>
+<title>LIRC ioctl fop</title>
<para>The LIRC device's ioctl definition is bound by the ioctl function
definition of struct file_operations, leaving us with an unsigned int
<varlistentry>
<term>LIRC_GET_FEATURES</term>
<listitem>
- <to>Obviously, get the underlying hardware device's features. If a driver
+ <para>Obviously, get the underlying hardware device's features. If a driver
does not announce support of certain features, calling of the corresponding
- ioctls is undefined.</to>
+ ioctls is undefined.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>LIRC_GET_SEND_MODE</term>
<listitem>
- <to>Get supported transmit mode. Only LIRC_MODE_PULSE is supported by lircd.</to>
+ <para>Get supported transmit mode. Only LIRC_MODE_PULSE is supported by lircd.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>LIRC_GET_REC_MODE</term>
<listitem>
- <to>Get supported receive modes. Only LIRC_MODE_MODE2 and LIRC_MODE_LIRCCODE
- are supported by lircd.</to>
+ <para>Get supported receive modes. Only LIRC_MODE_MODE2 and LIRC_MODE_LIRCCODE
+ are supported by lircd.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>LIRC_GET_SEND_CARRIER</term>
<listitem>
- <to>Get carrier frequency (in Hz) currently used for transmit.</to>
+ <para>Get carrier frequency (in Hz) currently used for transmit.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>LIRC_GET_REC_CARRIER</term>
<listitem>
- <to>Get carrier frequency (in Hz) currently used for IR reception.</to>
+ <para>Get carrier frequency (in Hz) currently used for IR reception.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>LIRC_{G,S}ET_{SEND,REC}_DUTY_CYCLE</term>
<listitem>
- <to>Get/set the duty cycle (from 0 to 100) of the carrier signal. Currently,
+ <para>Get/set the duty cycle (from 0 to 100) of the carrier signal. Currently,
no special meaning is defined for 0 or 100, but this could be used to switch
- off carrier generation in the future, so these values should be reserved.</to>
+ off carrier generation in the future, so these values should be reserved.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>LIRC_GET_REC_RESOLUTION</term>
<listitem>
- <to>Some receiver have maximum resolution which is defined by internal
+ <para>Some receiver have maximum resolution which is defined by internal
sample rate or data format limitations. E.g. it's common that signals can
only be reported in 50 microsecond steps. This integer value is used by
lircd to automatically adjust the aeps tolerance value in the lircd
- config file.</to>
+ config file.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>LIRC_GET_M{IN,AX}_TIMEOUT</term>
<listitem>
- <to>Some devices have internal timers that can be used to detect when
+ <para>Some devices have internal timers that can be used to detect when
there's no IR activity for a long time. This can help lircd in detecting
that a IR signal is finished and can speed up the decoding process.
Returns an integer value with the minimum/maximum timeout that can be
set. Some devices have a fixed timeout, in that case both ioctls will
- return the same value even though the timeout cannot be changed.</to>
+ return the same value even though the timeout cannot be changed.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>LIRC_GET_M{IN,AX}_FILTER_{PULSE,SPACE}</term>
<listitem>
- <to>Some devices are able to filter out spikes in the incoming signal
+ <para>Some devices are able to filter out spikes in the incoming signal
using given filter rules. These ioctls return the hardware capabilities
that describe the bounds of the possible filters. Filter settings depend
on the IR protocols that are expected. lircd derives the settings from
- all protocols definitions found in its config file.</to>
+ all protocols definitions found in its config file.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>LIRC_GET_LENGTH</term>
<listitem>
- <to>Retrieves the code length in bits (only for LIRC_MODE_LIRCCODE).
+ <para>Retrieves the code length in bits (only for LIRC_MODE_LIRCCODE).
Reads on the device must be done in blocks matching the bit count.
- The bit could should be rounded up so that it matches full bytes.</to>
+ The bit could should be rounded up so that it matches full bytes.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>LIRC_SET_{SEND,REC}_MODE</term>
<listitem>
- <to>Set send/receive mode. Largely obsolete for send, as only
- LIRC_MODE_PULSE is supported.</to>
+ <para>Set send/receive mode. Largely obsolete for send, as only
+ LIRC_MODE_PULSE is supported.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>LIRC_SET_{SEND,REC}_CARRIER</term>
<listitem>
- <to>Set send/receive carrier (in Hz).</to>
+ <para>Set send/receive carrier (in Hz).</para>
</listitem>
</varlistentry>
<varlistentry>
<term>LIRC_SET_TRANSMITTER_MASK</term>
<listitem>
- <to>This enables the given set of transmitters. The first transmitter
+ <para>This enables the given set of transmitters. The first transmitter
is encoded by the least significant bit, etc. When an invalid bit mask
is given, i.e. a bit is set, even though the device does not have so many
transitters, then this ioctl returns the number of available transitters
- and does nothing otherwise.</to>
+ and does nothing otherwise.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>LIRC_SET_REC_TIMEOUT</term>
<listitem>
- <to>Sets the integer value for IR inactivity timeout (cf.
+ <para>Sets the integer value for IR inactivity timeout (cf.
LIRC_GET_MIN_TIMEOUT and LIRC_GET_MAX_TIMEOUT). A value of 0 (if
supported by the hardware) disables all hardware timeouts and data should
be reported as soon as possible. If the exact value cannot be set, then
- the next possible value _greater_ than the given value should be set.</to>
+ the next possible value _greater_ than the given value should be set.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>LIRC_SET_REC_TIMEOUT_REPORTS</term>
<listitem>
- <to>Enable (1) or disable (0) timeout reports in LIRC_MODE_MODE2. By
- default, timeout reports should be turned off.</to>
+ <para>Enable (1) or disable (0) timeout reports in LIRC_MODE_MODE2. By
+ default, timeout reports should be turned off.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>LIRC_SET_REC_FILTER_{,PULSE,SPACE}</term>
<listitem>
- <to>Pulses/spaces shorter than this are filtered out by hardware. If
+ <para>Pulses/spaces shorter than this are filtered out by hardware. If
filters cannot be set independently for pulse/space, the corresponding
- ioctls must return an error and LIRC_SET_REC_FILTER shall be used instead.</to>
+ ioctls must return an error and LIRC_SET_REC_FILTER shall be used instead.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>LIRC_SET_MEASURE_CARRIER_MODE</term>
<listitem>
- <to>Enable (1)/disable (0) measure mode. If enabled, from the next key
+ <para>Enable (1)/disable (0) measure mode. If enabled, from the next key
press on, the driver will send LIRC_MODE2_FREQUENCY packets. By default
- this should be turned off.</to>
+ this should be turned off.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>LIRC_SET_REC_{DUTY_CYCLE,CARRIER}_RANGE</term>
<listitem>
- <to>To set a range use LIRC_SET_REC_DUTY_CYCLE_RANGE/LIRC_SET_REC_CARRIER_RANGE
+ <para>To set a range use LIRC_SET_REC_DUTY_CYCLE_RANGE/LIRC_SET_REC_CARRIER_RANGE
with the lower bound first and later LIRC_SET_REC_DUTY_CYCLE/LIRC_SET_REC_CARRIER
- with the upper bound.</to>
+ with the upper bound.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>LIRC_NOTIFY_DECODE</term>
<listitem>
- <to>This ioctl is called by lircd whenever a successful decoding of an
+ <para>This ioctl is called by lircd whenever a successful decoding of an
incoming IR signal could be done. This can be used by supporting hardware
- to give visual feedback to the user e.g. by flashing a LED.</to>
+ to give visual feedback to the user e.g. by flashing a LED.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>LIRC_SETUP_{START,END}</term>
<listitem>
- <to>Setting of several driver parameters can be optimized by encapsulating
+ <para>Setting of several driver parameters can be optimized by encapsulating
the according ioctl calls with LIRC_SETUP_START/LIRC_SETUP_END. When a
driver receives a LIRC_SETUP_START ioctl it can choose to not commit
further setting changes to the hardware until a LIRC_SETUP_END is received.
But this is open to the driver implementation and every driver must also
handle parameter changes which are not encapsulated by LIRC_SETUP_START
- and LIRC_SETUP_END. Drivers can also choose to ignore these ioctls.</to>
+ and LIRC_SETUP_END. Drivers can also choose to ignore these ioctls.</para>
</listitem>
</varlistentry>
</variablelist>
</section>
+</section>
projects / profile / ivi / kernel-adaptation-intel-automotive.git / commitdiff