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192 lines
4.5 KiB
192 lines
4.5 KiB
.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later |
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.. c:namespace:: RC |
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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:macro:: LIRC_GET_FEATURES |
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``int ioctl(int fd, LIRC_GET_FEATURES, __u32 *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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