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+.. -*- coding: utf-8; mode: rst -*-
+
+.. _FE_GET_INFO:
+
+*****************
+ioctl FE_GET_INFO
+*****************
+
+Name
+====
+
+FE_GET_INFO - Query DVB frontend capabilities and returns information about the - front-end. This call only requires read-only access to the device
+
+
+Synopsis
+========
+
+.. cpp:function:: int ioctl( int fd, int request, struct dvb_frontend_info *argp )
+
+
+Arguments
+=========
+
+``fd``
+ File descriptor returned by :ref:`open() <frontend_f_open>`.
+
+``request``
+ FE_GET_INFO
+
+``argp``
+ pointer to struct struct
+ :ref:`dvb_frontend_info <dvb-frontend-info>`
+
+
+Description
+===========
+
+All DVB frontend devices support the ``FE_GET_INFO`` ioctl. It is used
+to identify kernel devices compatible with this specification and to
+obtain information about driver and hardware capabilities. The ioctl
+takes a pointer to dvb_frontend_info which is filled by the driver.
+When the driver is not compatible with this specification the ioctl
+returns an error.
+
+.. _dvb-frontend-info:
+
+struct dvb_frontend_info
+========================
+
+.. flat-table:: struct dvb_frontend_info
+ :header-rows: 0
+ :stub-columns: 0
+ :widths: 1 1 2
+
+
+ - .. row 1
+
+ - char
+
+ - name[128]
+
+ - Name of the frontend
+
+ - .. row 2
+
+ - fe_type_t
+
+ - type
+
+ - **DEPRECATED**. DVBv3 type. Should not be used on modern programs,
+ as a frontend may have more than one type. So, the DVBv5 API
+ should be used instead to enumerate and select the frontend type.
+
+ - .. row 3
+
+ - uint32_t
+
+ - frequency_min
+
+ - Minimal frequency supported by the frontend
+
+ - .. row 4
+
+ - uint32_t
+
+ - frequency_max
+
+ - Maximal frequency supported by the frontend
+
+ - .. row 5
+
+ - uint32_t
+
+ - frequency_stepsize
+
+ - Frequency step - all frequencies are multiple of this value
+
+ - .. row 6
+
+ - uint32_t
+
+ - frequency_tolerance
+
+ - Tolerance of the frequency
+
+ - .. row 7
+
+ - uint32_t
+
+ - symbol_rate_min
+
+ - Minimal symbol rate (for Cable/Satellite systems), in bauds
+
+ - .. row 8
+
+ - uint32_t
+
+ - symbol_rate_max
+
+ - Maximal symbol rate (for Cable/Satellite systems), in bauds
+
+ - .. row 9
+
+ - uint32_t
+
+ - symbol_rate_tolerance
+
+ - Maximal symbol rate tolerance, in ppm
+
+ - .. row 10
+
+ - uint32_t
+
+ - notifier_delay
+
+ - **DEPRECATED**. Not used by any driver.
+
+ - .. row 11
+
+ - enum :ref:`fe_caps <fe-caps>`
+
+ - caps
+
+ - Capabilities supported by the frontend
+
+
+.. note:: The frequencies are specified in Hz for Terrestrial and Cable
+ systems. They're specified in kHz for Satellite systems
+
+
+.. _fe-caps-t:
+
+frontend capabilities
+=====================
+
+Capabilities describe what a frontend can do. Some capabilities are
+supported only on some specific frontend types.
+
+
+.. _fe-caps:
+
+.. flat-table:: enum fe_caps
+ :header-rows: 1
+ :stub-columns: 0
+
+
+ - .. row 1
+
+ - ID
+
+ - Description
+
+ - .. row 2
+
+ - .. _FE-IS-STUPID:
+
+ ``FE_IS_STUPID``
+
+ - There's something wrong at the frontend, and it can't report its
+ capabilities
+
+ - .. row 3
+
+ - .. _FE-CAN-INVERSION-AUTO:
+
+ ``FE_CAN_INVERSION_AUTO``
+
+ - The frontend is capable of auto-detecting inversion
+
+ - .. row 4
+
+ - .. _FE-CAN-FEC-1-2:
+
+ ``FE_CAN_FEC_1_2``
+
+ - The frontend supports FEC 1/2
+
+ - .. row 5
+
+ - .. _FE-CAN-FEC-2-3:
+
+ ``FE_CAN_FEC_2_3``
+
+ - The frontend supports FEC 2/3
+
+ - .. row 6
+
+ - .. _FE-CAN-FEC-3-4:
+
+ ``FE_CAN_FEC_3_4``
+
+ - The frontend supports FEC 3/4
+
+ - .. row 7
+
+ - .. _FE-CAN-FEC-4-5:
+
+ ``FE_CAN_FEC_4_5``
+
+ - The frontend supports FEC 4/5
+
+ - .. row 8
+
+ - .. _FE-CAN-FEC-5-6:
+
+ ``FE_CAN_FEC_5_6``
+
+ - The frontend supports FEC 5/6
+
+ - .. row 9
+
+ - .. _FE-CAN-FEC-6-7:
+
+ ``FE_CAN_FEC_6_7``
+
+ - The frontend supports FEC 6/7
+
+ - .. row 10
+
+ - .. _FE-CAN-FEC-7-8:
+
+ ``FE_CAN_FEC_7_8``
+
+ - The frontend supports FEC 7/8
+
+ - .. row 11
+
+ - .. _FE-CAN-FEC-8-9:
+
+ ``FE_CAN_FEC_8_9``
+
+ - The frontend supports FEC 8/9
+
+ - .. row 12
+
+ - .. _FE-CAN-FEC-AUTO:
+
+ ``FE_CAN_FEC_AUTO``
+
+ - The frontend can autodetect FEC.
+
+ - .. row 13
+
+ - .. _FE-CAN-QPSK:
+
+ ``FE_CAN_QPSK``
+
+ - The frontend supports QPSK modulation
+
+ - .. row 14
+
+ - .. _FE-CAN-QAM-16:
+
+ ``FE_CAN_QAM_16``
+
+ - The frontend supports 16-QAM modulation
+
+ - .. row 15
+
+ - .. _FE-CAN-QAM-32:
+
+ ``FE_CAN_QAM_32``
+
+ - The frontend supports 32-QAM modulation
+
+ - .. row 16
+
+ - .. _FE-CAN-QAM-64:
+
+ ``FE_CAN_QAM_64``
+
+ - The frontend supports 64-QAM modulation
+
+ - .. row 17
+
+ - .. _FE-CAN-QAM-128:
+
+ ``FE_CAN_QAM_128``
+
+ - The frontend supports 128-QAM modulation
+
+ - .. row 18
+
+ - .. _FE-CAN-QAM-256:
+
+ ``FE_CAN_QAM_256``
+
+ - The frontend supports 256-QAM modulation
+
+ - .. row 19
+
+ - .. _FE-CAN-QAM-AUTO:
+
+ ``FE_CAN_QAM_AUTO``
+
+ - The frontend can autodetect modulation
+
+ - .. row 20
+
+ - .. _FE-CAN-TRANSMISSION-MODE-AUTO:
+
+ ``FE_CAN_TRANSMISSION_MODE_AUTO``
+
+ - The frontend can autodetect the transmission mode
+
+ - .. row 21
+
+ - .. _FE-CAN-BANDWIDTH-AUTO:
+
+ ``FE_CAN_BANDWIDTH_AUTO``
+
+ - The frontend can autodetect the bandwidth
+
+ - .. row 22
+
+ - .. _FE-CAN-GUARD-INTERVAL-AUTO:
+
+ ``FE_CAN_GUARD_INTERVAL_AUTO``
+
+ - The frontend can autodetect the guard interval
+
+ - .. row 23
+
+ - .. _FE-CAN-HIERARCHY-AUTO:
+
+ ``FE_CAN_HIERARCHY_AUTO``
+
+ - The frontend can autodetect hierarch
+
+ - .. row 24
+
+ - .. _FE-CAN-8VSB:
+
+ ``FE_CAN_8VSB``
+
+ - The frontend supports 8-VSB modulation
+
+ - .. row 25
+
+ - .. _FE-CAN-16VSB:
+
+ ``FE_CAN_16VSB``
+
+ - The frontend supports 16-VSB modulation
+
+ - .. row 26
+
+ - .. _FE-HAS-EXTENDED-CAPS:
+
+ ``FE_HAS_EXTENDED_CAPS``
+
+ - Currently, unused
+
+ - .. row 27
+
+ - .. _FE-CAN-MULTISTREAM:
+
+ ``FE_CAN_MULTISTREAM``
+
+ - The frontend supports multistream filtering
+
+ - .. row 28
+
+ - .. _FE-CAN-TURBO-FEC:
+
+ ``FE_CAN_TURBO_FEC``
+
+ - The frontend supports turbo FEC modulation
+
+ - .. row 29
+
+ - .. _FE-CAN-2G-MODULATION:
+
+ ``FE_CAN_2G_MODULATION``
+
+ - The frontend supports "2nd generation modulation" (DVB-S2/T2)>
+
+ - .. row 30
+
+ - .. _FE-NEEDS-BENDING:
+
+ ``FE_NEEDS_BENDING``
+
+ - Not supported anymore, don't use it
+
+ - .. row 31
+
+ - .. _FE-CAN-RECOVER:
+
+ ``FE_CAN_RECOVER``
+
+ - The frontend can recover from a cable unplug automatically
+
+ - .. row 32
+
+ - .. _FE-CAN-MUTE-TS:
+
+ ``FE_CAN_MUTE_TS``
+
+ - The frontend can stop spurious TS data output
+
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.