194 lines
4.4 KiB
ReStructuredText
Executable file
194 lines
4.4 KiB
ReStructuredText
Executable file
.. -*- coding: utf-8; mode: rst -*-
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.. _lirc_get_features:
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***********************
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ioctl LIRC_GET_FEATURES
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***********************
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Name
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====
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LIRC_GET_FEATURES - Get the underlying hardware device's features
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Synopsis
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========
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.. c:function:: int ioctl( int fd, LIRC_GET_FEATURES, __u32 *features)
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:name: LIRC_GET_FEATURES
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Arguments
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=========
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``fd``
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File descriptor returned by open().
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``features``
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Bitmask with the LIRC features.
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Description
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===========
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Get the underlying hardware device's features. If a driver does not
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announce support of certain features, calling of the corresponding ioctls
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is undefined.
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LIRC features
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=============
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.. _LIRC-CAN-REC-RAW:
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``LIRC_CAN_REC_RAW``
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Unused. Kept just to avoid breaking uAPI.
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.. _LIRC-CAN-REC-PULSE:
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``LIRC_CAN_REC_PULSE``
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Unused. Kept just to avoid breaking uAPI.
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:ref:`LIRC_MODE_PULSE <lirc-mode-pulse>` can only be used for transmitting.
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.. _LIRC-CAN-REC-MODE2:
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``LIRC_CAN_REC_MODE2``
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This is raw IR driver for receiving. This means that
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:ref:`LIRC_MODE_MODE2 <lirc-mode-MODE2>` is used. This also implies
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that :ref:`LIRC_MODE_SCANCODE <lirc-mode-SCANCODE>` is also supported,
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as long as the kernel is recent enough. Use the
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:ref:`lirc_set_rec_mode` to switch modes.
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.. _LIRC-CAN-REC-LIRCCODE:
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``LIRC_CAN_REC_LIRCCODE``
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Unused. Kept just to avoid breaking uAPI.
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.. _LIRC-CAN-REC-SCANCODE:
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``LIRC_CAN_REC_SCANCODE``
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This is a scancode driver for receiving. This means that
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:ref:`LIRC_MODE_SCANCODE <lirc-mode-SCANCODE>` is used.
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.. _LIRC-CAN-SET-SEND-CARRIER:
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``LIRC_CAN_SET_SEND_CARRIER``
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The driver supports changing the modulation frequency via
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:ref:`ioctl LIRC_SET_SEND_CARRIER <LIRC_SET_SEND_CARRIER>`.
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.. _LIRC-CAN-SET-SEND-DUTY-CYCLE:
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``LIRC_CAN_SET_SEND_DUTY_CYCLE``
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The driver supports changing the duty cycle using
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:ref:`ioctl LIRC_SET_SEND_DUTY_CYCLE <LIRC_SET_SEND_DUTY_CYCLE>`.
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.. _LIRC-CAN-SET-TRANSMITTER-MASK:
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``LIRC_CAN_SET_TRANSMITTER_MASK``
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The driver supports changing the active transmitter(s) using
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:ref:`ioctl LIRC_SET_TRANSMITTER_MASK <LIRC_SET_TRANSMITTER_MASK>`.
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.. _LIRC-CAN-SET-REC-CARRIER:
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``LIRC_CAN_SET_REC_CARRIER``
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The driver supports setting the receive carrier frequency using
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:ref:`ioctl LIRC_SET_REC_CARRIER <LIRC_SET_REC_CARRIER>`.
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.. _LIRC-CAN-SET-REC-DUTY-CYCLE-RANGE:
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``LIRC_CAN_SET_REC_DUTY_CYCLE_RANGE``
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Unused. Kept just to avoid breaking uAPI.
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.. _LIRC-CAN-SET-REC-CARRIER-RANGE:
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``LIRC_CAN_SET_REC_CARRIER_RANGE``
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The driver supports
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:ref:`ioctl LIRC_SET_REC_CARRIER_RANGE <LIRC_SET_REC_CARRIER_RANGE>`.
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.. _LIRC-CAN-GET-REC-RESOLUTION:
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``LIRC_CAN_GET_REC_RESOLUTION``
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The driver supports
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:ref:`ioctl LIRC_GET_REC_RESOLUTION <LIRC_GET_REC_RESOLUTION>`.
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.. _LIRC-CAN-SET-REC-TIMEOUT:
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``LIRC_CAN_SET_REC_TIMEOUT``
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The driver supports
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:ref:`ioctl LIRC_SET_REC_TIMEOUT <LIRC_SET_REC_TIMEOUT>`.
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.. _LIRC-CAN-SET-REC-FILTER:
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``LIRC_CAN_SET_REC_FILTER``
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Unused. Kept just to avoid breaking uAPI.
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.. _LIRC-CAN-MEASURE-CARRIER:
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``LIRC_CAN_MEASURE_CARRIER``
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The driver supports measuring of the modulation frequency using
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:ref:`ioctl LIRC_SET_MEASURE_CARRIER_MODE <LIRC_SET_MEASURE_CARRIER_MODE>`.
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.. _LIRC-CAN-USE-WIDEBAND-RECEIVER:
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``LIRC_CAN_USE_WIDEBAND_RECEIVER``
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The driver supports learning mode using
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:ref:`ioctl LIRC_SET_WIDEBAND_RECEIVER <LIRC_SET_WIDEBAND_RECEIVER>`.
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.. _LIRC-CAN-NOTIFY-DECODE:
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``LIRC_CAN_NOTIFY_DECODE``
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Unused. Kept just to avoid breaking uAPI.
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.. _LIRC-CAN-SEND-RAW:
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``LIRC_CAN_SEND_RAW``
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Unused. Kept just to avoid breaking uAPI.
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.. _LIRC-CAN-SEND-PULSE:
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``LIRC_CAN_SEND_PULSE``
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The driver supports sending (also called as IR blasting or IR TX) using
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:ref:`LIRC_MODE_PULSE <lirc-mode-pulse>`. This implies that
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:ref:`LIRC_MODE_SCANCODE <lirc-mode-SCANCODE>` is also supported for
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transmit, as long as the kernel is recent enough. Use the
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:ref:`lirc_set_send_mode` to switch modes.
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.. _LIRC-CAN-SEND-MODE2:
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``LIRC_CAN_SEND_MODE2``
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Unused. Kept just to avoid breaking uAPI.
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:ref:`LIRC_MODE_MODE2 <lirc-mode-mode2>` can only be used for receiving.
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.. _LIRC-CAN-SEND-LIRCCODE:
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``LIRC_CAN_SEND_LIRCCODE``
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Unused. Kept just to avoid breaking uAPI.
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Return Value
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============
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On success 0 is returned, on error -1 and the ``errno`` variable is set
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appropriately. The generic error codes are described at the
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:ref:`Generic Error Codes <gen-errors>` chapter.
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