From e8dd273d199f5bbe295a8e3d8b777c5505b6b2e1 Mon Sep 17 00:00:00 2001 From: Salah Triki Date: Thu, 17 Sep 2026 14:00:52 +0100 Subject: iio: proximity: isl29501: Fix return type of isl29501_register_write isl29501_register_write() was returning a u32 instead of an int. Since the function returns negative error codes (such as -ERANGE or return values from i2c_smbus_write_byte_data()), returning an unsigned integer type prevents callers from correctly checking for negative error conditions. Fix this by changing the function return type from u32 to int. This was found through manual code review. Fixes: 1c28799257bc ("iio: light: isl29501: Add support for the ISL29501 ToF sensor.") Signed-off-by: Salah Triki Reviewed-by: Joshua Crofts Cc: stable@vger.kernel.org Signed-off-by: Jonathan Cameron --- .../userspace-api/media/dvb/ca-fclose.rst | 40 + Documentation/userspace-api/media/dvb/ca-fopen.rst | 72 + .../userspace-api/media/dvb/ca-get-cap.rst | 46 + .../userspace-api/media/dvb/ca-get-descr-info.rst | 43 + .../userspace-api/media/dvb/ca-get-msg.rst | 50 + .../userspace-api/media/dvb/ca-get-slot-info.rst | 56 + Documentation/userspace-api/media/dvb/ca-reset.rst | 43 + .../userspace-api/media/dvb/ca-send-msg.rst | 50 + .../userspace-api/media/dvb/ca-set-descr.rst | 46 + .../userspace-api/media/dvb/ca.h.rst.exceptions | 25 + Documentation/userspace-api/media/dvb/ca.rst | 25 + .../userspace-api/media/dvb/ca_data_types.rst | 9 + .../userspace-api/media/dvb/ca_function_calls.rst | 20 + .../userspace-api/media/dvb/ca_high_level.rst | 157 ++ Documentation/userspace-api/media/dvb/demux.rst | 23 + .../userspace-api/media/dvb/dmx-add-pid.rst | 47 + .../userspace-api/media/dvb/dmx-expbuf.rst | 87 + .../userspace-api/media/dvb/dmx-fclose.rst | 42 + .../userspace-api/media/dvb/dmx-fopen.rst | 88 + .../userspace-api/media/dvb/dmx-fread.rst | 77 + .../userspace-api/media/dvb/dmx-fwrite.rst | 70 + .../userspace-api/media/dvb/dmx-get-pes-pids.rst | 62 + .../userspace-api/media/dvb/dmx-get-stc.rst | 64 + Documentation/userspace-api/media/dvb/dmx-mmap.rst | 115 + .../userspace-api/media/dvb/dmx-munmap.rst | 52 + Documentation/userspace-api/media/dvb/dmx-qbuf.rst | 85 + .../userspace-api/media/dvb/dmx-querybuf.rst | 64 + .../userspace-api/media/dvb/dmx-remove-pid.rst | 48 + .../userspace-api/media/dvb/dmx-reqbufs.rst | 75 + .../media/dvb/dmx-set-buffer-size.rst | 48 + .../userspace-api/media/dvb/dmx-set-filter.rst | 55 + .../userspace-api/media/dvb/dmx-set-pes-filter.rst | 64 + .../userspace-api/media/dvb/dmx-start.rst | 65 + Documentation/userspace-api/media/dvb/dmx-stop.rst | 44 + .../userspace-api/media/dvb/dmx.h.rst.exceptions | 62 + .../userspace-api/media/dvb/dmx_fcalls.rst | 30 + .../userspace-api/media/dvb/dmx_types.rst | 10 + .../userspace-api/media/dvb/dvb-fe-read-status.rst | 25 + .../userspace-api/media/dvb/dvb-frontend-event.rst | 15 + .../media/dvb/dvb-frontend-parameters.rst | 119 + Documentation/userspace-api/media/dvb/dvbapi.rst | 113 + .../userspace-api/media/dvb/dvbproperty.rst | 126 + Documentation/userspace-api/media/dvb/dvbstb.svg | 17 + Documentation/userspace-api/media/dvb/examples.rst | 16 + .../userspace-api/media/dvb/fe-bandwidth-t.rst | 74 + .../media/dvb/fe-diseqc-recv-slave-reply.rst | 47 + .../media/dvb/fe-diseqc-reset-overload.rst | 45 + .../media/dvb/fe-diseqc-send-burst.rst | 50 + .../media/dvb/fe-diseqc-send-master-cmd.rst | 48 + .../media/dvb/fe-dishnetwork-send-legacy-cmd.rst | 53 + .../media/dvb/fe-enable-high-lnb-voltage.rst | 52 + .../userspace-api/media/dvb/fe-get-event.rst | 67 + .../userspace-api/media/dvb/fe-get-frontend.rst | 58 + .../userspace-api/media/dvb/fe-get-info.rst | 59 + .../userspace-api/media/dvb/fe-get-property.rst | 75 + .../userspace-api/media/dvb/fe-read-ber.rst | 49 + .../media/dvb/fe-read-signal-strength.rst | 49 + .../userspace-api/media/dvb/fe-read-snr.rst | 49 + .../userspace-api/media/dvb/fe-read-status.rst | 62 + .../media/dvb/fe-read-uncorrected-blocks.rst | 51 + .../media/dvb/fe-set-frontend-tune-mode.rst | 55 + .../userspace-api/media/dvb/fe-set-frontend.rst | 68 + .../userspace-api/media/dvb/fe-set-tone.rst | 56 + .../userspace-api/media/dvb/fe-set-voltage.rst | 60 + .../userspace-api/media/dvb/fe-type-t.rst | 91 + .../media/dvb/fe_property_parameters.rst | 1013 ++++++++ .../userspace-api/media/dvb/frontend-header.rst | 6 + .../media/dvb/frontend-property-cable-systems.rst | 75 + .../dvb/frontend-property-satellite-systems.rst | 105 + .../dvb/frontend-property-terrestrial-systems.rst | 294 +++ .../media/dvb/frontend-stat-properties.rst | 245 ++ .../media/dvb/frontend.h.rst.exceptions | 247 ++ Documentation/userspace-api/media/dvb/frontend.rst | 56 + .../userspace-api/media/dvb/frontend_f_close.rst | 46 + .../userspace-api/media/dvb/frontend_f_open.rst | 104 + .../userspace-api/media/dvb/frontend_fcalls.rst | 24 + .../media/dvb/frontend_legacy_api.rst | 38 + .../media/dvb/frontend_legacy_dvbv3_api.rst | 18 + Documentation/userspace-api/media/dvb/headers.rst | 46 + Documentation/userspace-api/media/dvb/intro.rst | 183 ++ .../userspace-api/media/dvb/legacy_dvb_apis.rst | 26 + .../userspace-api/media/dvb/legacy_dvb_audio.rst | 1642 +++++++++++++ .../media/dvb/legacy_dvb_decoder_api.rst | 61 + .../userspace-api/media/dvb/legacy_dvb_osd.rst | 883 +++++++ .../userspace-api/media/dvb/legacy_dvb_video.rst | 2430 ++++++++++++++++++++ .../userspace-api/media/dvb/net-add-if.rst | 52 + .../userspace-api/media/dvb/net-get-if.rst | 50 + .../userspace-api/media/dvb/net-remove-if.rst | 46 + .../userspace-api/media/dvb/net-types.rst | 9 + .../userspace-api/media/dvb/net.h.rst.exceptions | 13 + Documentation/userspace-api/media/dvb/net.rst | 41 + .../media/dvb/query-dvb-frontend-info.rst | 13 + 92 files changed, 11474 insertions(+) create mode 100644 Documentation/userspace-api/media/dvb/ca-fclose.rst create mode 100644 Documentation/userspace-api/media/dvb/ca-fopen.rst create mode 100644 Documentation/userspace-api/media/dvb/ca-get-cap.rst create mode 100644 Documentation/userspace-api/media/dvb/ca-get-descr-info.rst create mode 100644 Documentation/userspace-api/media/dvb/ca-get-msg.rst create mode 100644 Documentation/userspace-api/media/dvb/ca-get-slot-info.rst create mode 100644 Documentation/userspace-api/media/dvb/ca-reset.rst create mode 100644 Documentation/userspace-api/media/dvb/ca-send-msg.rst create mode 100644 Documentation/userspace-api/media/dvb/ca-set-descr.rst create mode 100644 Documentation/userspace-api/media/dvb/ca.h.rst.exceptions create mode 100644 Documentation/userspace-api/media/dvb/ca.rst create mode 100644 Documentation/userspace-api/media/dvb/ca_data_types.rst create mode 100644 Documentation/userspace-api/media/dvb/ca_function_calls.rst create mode 100644 Documentation/userspace-api/media/dvb/ca_high_level.rst create mode 100644 Documentation/userspace-api/media/dvb/demux.rst create mode 100644 Documentation/userspace-api/media/dvb/dmx-add-pid.rst create mode 100644 Documentation/userspace-api/media/dvb/dmx-expbuf.rst create mode 100644 Documentation/userspace-api/media/dvb/dmx-fclose.rst create mode 100644 Documentation/userspace-api/media/dvb/dmx-fopen.rst create mode 100644 Documentation/userspace-api/media/dvb/dmx-fread.rst create mode 100644 Documentation/userspace-api/media/dvb/dmx-fwrite.rst create mode 100644 Documentation/userspace-api/media/dvb/dmx-get-pes-pids.rst create mode 100644 Documentation/userspace-api/media/dvb/dmx-get-stc.rst create mode 100644 Documentation/userspace-api/media/dvb/dmx-mmap.rst create mode 100644 Documentation/userspace-api/media/dvb/dmx-munmap.rst create mode 100644 Documentation/userspace-api/media/dvb/dmx-qbuf.rst create mode 100644 Documentation/userspace-api/media/dvb/dmx-querybuf.rst create mode 100644 Documentation/userspace-api/media/dvb/dmx-remove-pid.rst create mode 100644 Documentation/userspace-api/media/dvb/dmx-reqbufs.rst create mode 100644 Documentation/userspace-api/media/dvb/dmx-set-buffer-size.rst create mode 100644 Documentation/userspace-api/media/dvb/dmx-set-filter.rst create mode 100644 Documentation/userspace-api/media/dvb/dmx-set-pes-filter.rst create mode 100644 Documentation/userspace-api/media/dvb/dmx-start.rst create mode 100644 Documentation/userspace-api/media/dvb/dmx-stop.rst create mode 100644 Documentation/userspace-api/media/dvb/dmx.h.rst.exceptions create mode 100644 Documentation/userspace-api/media/dvb/dmx_fcalls.rst create mode 100644 Documentation/userspace-api/media/dvb/dmx_types.rst create mode 100644 Documentation/userspace-api/media/dvb/dvb-fe-read-status.rst create mode 100644 Documentation/userspace-api/media/dvb/dvb-frontend-event.rst create mode 100644 Documentation/userspace-api/media/dvb/dvb-frontend-parameters.rst create mode 100644 Documentation/userspace-api/media/dvb/dvbapi.rst create mode 100644 Documentation/userspace-api/media/dvb/dvbproperty.rst create mode 100644 Documentation/userspace-api/media/dvb/dvbstb.svg create mode 100644 Documentation/userspace-api/media/dvb/examples.rst create mode 100644 Documentation/userspace-api/media/dvb/fe-bandwidth-t.rst create mode 100644 Documentation/userspace-api/media/dvb/fe-diseqc-recv-slave-reply.rst create mode 100644 Documentation/userspace-api/media/dvb/fe-diseqc-reset-overload.rst create mode 100644 Documentation/userspace-api/media/dvb/fe-diseqc-send-burst.rst create mode 100644 Documentation/userspace-api/media/dvb/fe-diseqc-send-master-cmd.rst create mode 100644 Documentation/userspace-api/media/dvb/fe-dishnetwork-send-legacy-cmd.rst create mode 100644 Documentation/userspace-api/media/dvb/fe-enable-high-lnb-voltage.rst create mode 100644 Documentation/userspace-api/media/dvb/fe-get-event.rst create mode 100644 Documentation/userspace-api/media/dvb/fe-get-frontend.rst create mode 100644 Documentation/userspace-api/media/dvb/fe-get-info.rst create mode 100644 Documentation/userspace-api/media/dvb/fe-get-property.rst create mode 100644 Documentation/userspace-api/media/dvb/fe-read-ber.rst create mode 100644 Documentation/userspace-api/media/dvb/fe-read-signal-strength.rst create mode 100644 Documentation/userspace-api/media/dvb/fe-read-snr.rst create mode 100644 Documentation/userspace-api/media/dvb/fe-read-status.rst create mode 100644 Documentation/userspace-api/media/dvb/fe-read-uncorrected-blocks.rst create mode 100644 Documentation/userspace-api/media/dvb/fe-set-frontend-tune-mode.rst create mode 100644 Documentation/userspace-api/media/dvb/fe-set-frontend.rst create mode 100644 Documentation/userspace-api/media/dvb/fe-set-tone.rst create mode 100644 Documentation/userspace-api/media/dvb/fe-set-voltage.rst create mode 100644 Documentation/userspace-api/media/dvb/fe-type-t.rst create mode 100644 Documentation/userspace-api/media/dvb/fe_property_parameters.rst create mode 100644 Documentation/userspace-api/media/dvb/frontend-header.rst create mode 100644 Documentation/userspace-api/media/dvb/frontend-property-cable-systems.rst create mode 100644 Documentation/userspace-api/media/dvb/frontend-property-satellite-systems.rst create mode 100644 Documentation/userspace-api/media/dvb/frontend-property-terrestrial-systems.rst create mode 100644 Documentation/userspace-api/media/dvb/frontend-stat-properties.rst create mode 100644 Documentation/userspace-api/media/dvb/frontend.h.rst.exceptions create mode 100644 Documentation/userspace-api/media/dvb/frontend.rst create mode 100644 Documentation/userspace-api/media/dvb/frontend_f_close.rst create mode 100644 Documentation/userspace-api/media/dvb/frontend_f_open.rst create mode 100644 Documentation/userspace-api/media/dvb/frontend_fcalls.rst create mode 100644 Documentation/userspace-api/media/dvb/frontend_legacy_api.rst create mode 100644 Documentation/userspace-api/media/dvb/frontend_legacy_dvbv3_api.rst create mode 100644 Documentation/userspace-api/media/dvb/headers.rst create mode 100644 Documentation/userspace-api/media/dvb/intro.rst create mode 100644 Documentation/userspace-api/media/dvb/legacy_dvb_apis.rst create mode 100644 Documentation/userspace-api/media/dvb/legacy_dvb_audio.rst create mode 100644 Documentation/userspace-api/media/dvb/legacy_dvb_decoder_api.rst create mode 100644 Documentation/userspace-api/media/dvb/legacy_dvb_osd.rst create mode 100644 Documentation/userspace-api/media/dvb/legacy_dvb_video.rst create mode 100644 Documentation/userspace-api/media/dvb/net-add-if.rst create mode 100644 Documentation/userspace-api/media/dvb/net-get-if.rst create mode 100644 Documentation/userspace-api/media/dvb/net-remove-if.rst create mode 100644 Documentation/userspace-api/media/dvb/net-types.rst create mode 100644 Documentation/userspace-api/media/dvb/net.h.rst.exceptions create mode 100644 Documentation/userspace-api/media/dvb/net.rst create mode 100644 Documentation/userspace-api/media/dvb/query-dvb-frontend-info.rst (limited to 'Documentation/userspace-api/media/dvb') diff --git a/Documentation/userspace-api/media/dvb/ca-fclose.rst b/Documentation/userspace-api/media/dvb/ca-fclose.rst new file mode 100644 index 000000000..27f217a35 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/ca-fclose.rst @@ -0,0 +1,40 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.ca + +.. _ca_fclose: + +===================== +Digital TV CA close() +===================== + +Name +---- + +Digital TV CA close() + +Synopsis +-------- + +.. c:function:: int close(int fd) + +Arguments +--------- + +``fd`` + File descriptor returned by a previous call to :c:func:`open()`. + +Description +----------- + +This system call closes a previously opened CA device. + +Return Value +------------ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/ca-fopen.rst b/Documentation/userspace-api/media/dvb/ca-fopen.rst new file mode 100644 index 000000000..7f99908ff --- /dev/null +++ b/Documentation/userspace-api/media/dvb/ca-fopen.rst @@ -0,0 +1,72 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.ca + +.. _ca_fopen: + +==================== +Digital TV CA open() +==================== + +Name +---- + +Digital TV CA open() + +Synopsis +-------- + +.. c:function:: int open(const char *name, int flags) + +Arguments +--------- + +``name`` + Name of specific Digital TV CA device. + +``flags`` + A bit-wise OR of the following flags: + +.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + :widths: 1 16 + + - - ``O_RDONLY`` + - read-only access + + - - ``O_RDWR`` + - read/write access + + - - ``O_NONBLOCK`` + - open in non-blocking mode + (blocking mode is the default) + +Description +----------- + +This system call opens a named ca device (e.g. ``/dev/dvb/adapter?/ca?``) +for subsequent use. + +When an ``open()`` call has succeeded, the device will be ready for use. The +significance of blocking or non-blocking mode is described in the +documentation for functions where there is a difference. It does not +affect the semantics of the ``open()`` call itself. A device opened in +blocking mode can later be put into non-blocking mode (and vice versa) +using the ``F_SETFL`` command of the ``fcntl`` system call. This is a +standard system call, documented in the Linux manual page for fcntl. +Only one user can open the CA Device in ``O_RDWR`` mode. All other +attempts to open the device in this mode will fail, and an error code +will be returned. + +Return Value +------------ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/ca-get-cap.rst b/Documentation/userspace-api/media/dvb/ca-get-cap.rst new file mode 100644 index 000000000..9b29513ee --- /dev/null +++ b/Documentation/userspace-api/media/dvb/ca-get-cap.rst @@ -0,0 +1,46 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.ca + +.. _CA_GET_CAP: + +========== +CA_GET_CAP +========== + +Name +---- + +CA_GET_CAP + +Synopsis +-------- + +.. c:macro:: CA_GET_CAP + +``int ioctl(fd, CA_GET_CAP, struct ca_caps *caps)`` + +Arguments +--------- + +``fd`` + File descriptor returned by a previous call to :c:func:`open()`. + +``caps`` + Pointer to struct :c:type:`ca_caps`. + +Description +----------- + +Queries the Kernel for information about the available CA and descrambler +slots, and their types. + +Return Value +------------ + +On success 0 is returned and :c:type:`ca_caps` is filled. + +On error, -1 is returned and the ``errno`` variable is set +appropriately. + +The generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/ca-get-descr-info.rst b/Documentation/userspace-api/media/dvb/ca-get-descr-info.rst new file mode 100644 index 000000000..0cfdcdab3 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/ca-get-descr-info.rst @@ -0,0 +1,43 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.ca + +.. _CA_GET_DESCR_INFO: + +================= +CA_GET_DESCR_INFO +================= + +Name +---- + +CA_GET_DESCR_INFO + +Synopsis +-------- + +.. c:macro:: CA_GET_DESCR_INFO + +``int ioctl(fd, CA_GET_DESCR_INFO, struct ca_descr_info *desc)`` + +Arguments +--------- + +``fd`` + File descriptor returned by a previous call to :c:func:`open()`. + +``desc`` + Pointer to struct :c:type:`ca_descr_info`. + +Description +----------- + +Returns information about all descrambler slots. + +Return Value +------------ + +On success 0 is returned, and :c:type:`ca_descr_info` is filled. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. The generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/ca-get-msg.rst b/Documentation/userspace-api/media/dvb/ca-get-msg.rst new file mode 100644 index 000000000..7c9a8d197 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/ca-get-msg.rst @@ -0,0 +1,50 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.ca + +.. _CA_GET_MSG: + +========== +CA_GET_MSG +========== + +Name +---- + +CA_GET_MSG + +Synopsis +-------- + +.. c:macro:: CA_GET_MSG + +``int ioctl(fd, CA_GET_MSG, struct ca_msg *msg)`` + +Arguments +--------- + +``fd`` + File descriptor returned by a previous call to :c:func:`open()`. + +``msg`` + Pointer to struct :c:type:`ca_msg`. + +Description +----------- + +Receives a message via a CI CA module. + +.. note:: + + Please notice that, on most drivers, this is done by reading from + the /dev/adapter?/ca? device node. + +Return Value +------------ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/ca-get-slot-info.rst b/Documentation/userspace-api/media/dvb/ca-get-slot-info.rst new file mode 100644 index 000000000..582444af7 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/ca-get-slot-info.rst @@ -0,0 +1,56 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.ca + +.. _CA_GET_SLOT_INFO: + +================ +CA_GET_SLOT_INFO +================ + +Name +---- + +CA_GET_SLOT_INFO + +Synopsis +-------- + +.. c:macro:: CA_GET_SLOT_INFO + +``int ioctl(fd, CA_GET_SLOT_INFO, struct ca_slot_info *info)`` + +Arguments +--------- + +``fd`` + File descriptor returned by a previous call to :c:func:`open()`. + +``info`` + Pointer to struct :c:type:`ca_slot_info`. + +Description +----------- + +Returns information about a CA slot identified by +:c:type:`ca_slot_info`.slot_num. + +Return Value +------------ + +On success 0 is returned, and :c:type:`ca_slot_info` is filled. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + :widths: 1 16 + + - - ``ENODEV`` + - the slot is not available. + +The generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/ca-reset.rst b/Documentation/userspace-api/media/dvb/ca-reset.rst new file mode 100644 index 000000000..b01ca48f0 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/ca-reset.rst @@ -0,0 +1,43 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.ca + +.. _CA_RESET: + +======== +CA_RESET +======== + +Name +---- + +CA_RESET + +Synopsis +-------- + +.. c:macro:: CA_RESET + +``int ioctl(fd, CA_RESET)`` + +Arguments +--------- + +``fd`` + File descriptor returned by a previous call to :c:func:`open()`. + +Description +----------- + +Puts the Conditional Access hardware on its initial state. It should +be called before start using the CA hardware. + +Return Value +------------ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/ca-send-msg.rst b/Documentation/userspace-api/media/dvb/ca-send-msg.rst new file mode 100644 index 000000000..7dd2ab4ef --- /dev/null +++ b/Documentation/userspace-api/media/dvb/ca-send-msg.rst @@ -0,0 +1,50 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.ca + +.. _CA_SEND_MSG: + +=========== +CA_SEND_MSG +=========== + +Name +---- + +CA_SEND_MSG + +Synopsis +-------- + +.. c:macro:: CA_SEND_MSG + +``int ioctl(fd, CA_SEND_MSG, struct ca_msg *msg)`` + +Arguments +--------- + +``fd`` + File descriptor returned by a previous call to :c:func:`open()`. + +``msg`` + Pointer to struct :c:type:`ca_msg`. + +Description +----------- + +Sends a message via a CI CA module. + +.. note:: + + Please notice that, on most drivers, this is done by writing + to the /dev/adapter?/ca? device node. + +Return Value +------------ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/ca-set-descr.rst b/Documentation/userspace-api/media/dvb/ca-set-descr.rst new file mode 100644 index 000000000..a740af34c --- /dev/null +++ b/Documentation/userspace-api/media/dvb/ca-set-descr.rst @@ -0,0 +1,46 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.ca + +.. _CA_SET_DESCR: + +============ +CA_SET_DESCR +============ + +Name +---- + +CA_SET_DESCR + +Synopsis +-------- + +.. c:macro:: CA_SET_DESCR + +``int ioctl(fd, CA_SET_DESCR, struct ca_descr *desc)`` + +Arguments +--------- + +``fd`` + File descriptor returned by a previous call to :c:func:`open()`. + +``msg`` + Pointer to struct :c:type:`ca_descr`. + +Description +----------- + +CA_SET_DESCR is used for feeding descrambler CA slots with descrambling +keys (referred as control words). + +Return Value +------------ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/ca.h.rst.exceptions b/Documentation/userspace-api/media/dvb/ca.h.rst.exceptions new file mode 100644 index 000000000..f6828238e --- /dev/null +++ b/Documentation/userspace-api/media/dvb/ca.h.rst.exceptions @@ -0,0 +1,25 @@ +# SPDX-License-Identifier: GPL-2.0 + +# Ignore header name +ignore define _DVBCA_H_ + +# struct ca_slot_info defines +replace define CA_CI :c:type:`ca_slot_info` +replace define CA_CI_LINK :c:type:`ca_slot_info` +replace define CA_CI_PHYS :c:type:`ca_slot_info` +replace define CA_DESCR :c:type:`ca_slot_info` +replace define CA_SC :c:type:`ca_slot_info` +replace define CA_CI_MODULE_PRESENT :c:type:`ca_slot_info` +replace define CA_CI_MODULE_READY :c:type:`ca_slot_info` + +# struct ca_descr_info defines +replace define CA_ECD :c:type:`ca_descr_info` +replace define CA_NDS :c:type:`ca_descr_info` +replace define CA_DSS :c:type:`ca_descr_info` + +# some typedefs should point to struct/enums +replace typedef ca_slot_info_t :c:type:`ca_slot_info` +replace typedef ca_descr_info_t :c:type:`ca_descr_info` +replace typedef ca_caps_t :c:type:`ca_caps` +replace typedef ca_msg_t :c:type:`ca_msg` +replace typedef ca_descr_t :c:type:`ca_descr` diff --git a/Documentation/userspace-api/media/dvb/ca.rst b/Documentation/userspace-api/media/dvb/ca.rst new file mode 100644 index 000000000..0dc00e5e4 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/ca.rst @@ -0,0 +1,25 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. _dvb_ca: + +#################### +Digital TV CA Device +#################### + +The Digital TV CA device controls the conditional access hardware. It +can be accessed through ``/dev/dvb/adapter?/ca?``. Data types and ioctl +definitions can be accessed by including ``linux/dvb/ca.h`` in your +application. + +.. note:: + + There are three ioctls at this API that aren't documented: + :ref:`CA_GET_MSG`, :ref:`CA_SEND_MSG` and :ref:`CA_SET_DESCR`. + Documentation for them are welcome. + +.. toctree:: + :maxdepth: 1 + + ca_data_types + ca_function_calls + ca_high_level diff --git a/Documentation/userspace-api/media/dvb/ca_data_types.rst b/Documentation/userspace-api/media/dvb/ca_data_types.rst new file mode 100644 index 000000000..54ea2a987 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/ca_data_types.rst @@ -0,0 +1,9 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. _ca_data_types: + +************* +CA Data Types +************* + +.. kernel-doc:: include/uapi/linux/dvb/ca.h diff --git a/Documentation/userspace-api/media/dvb/ca_function_calls.rst b/Documentation/userspace-api/media/dvb/ca_function_calls.rst new file mode 100644 index 000000000..3b893fbd5 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/ca_function_calls.rst @@ -0,0 +1,20 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. _ca_function_calls: + +***************** +CA Function Calls +***************** + +.. toctree:: + :maxdepth: 1 + + ca-fopen + ca-fclose + ca-reset + ca-get-cap + ca-get-slot-info + ca-get-descr-info + ca-get-msg + ca-send-msg + ca-set-descr diff --git a/Documentation/userspace-api/media/dvb/ca_high_level.rst b/Documentation/userspace-api/media/dvb/ca_high_level.rst new file mode 100644 index 000000000..a73f3691c --- /dev/null +++ b/Documentation/userspace-api/media/dvb/ca_high_level.rst @@ -0,0 +1,157 @@ +.. SPDX-License-Identifier: GPL-2.0 + +The High level CI API +===================== + +.. note:: + + This documentation is outdated. + +This document describes the high level CI API as in accordance to the +Linux DVB API. + + +With the High Level CI approach any new card with almost any random +architecture can be implemented with this style, the definitions +inside the switch statement can be easily adapted for any card, thereby +eliminating the need for any additional ioctls. + +The disadvantage is that the driver/hardware has to manage the rest. For +the application programmer it would be as simple as sending/receiving an +array to/from the CI ioctls as defined in the Linux DVB API. No changes +have been made in the API to accommodate this feature. + + +Why the need for another CI interface? +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +This is one of the most commonly asked question. Well a nice question. +Strictly speaking this is not a new interface. + +The CI interface is defined in the DVB API in ca.h as: + +.. code-block:: c + + typedef struct ca_slot_info { + int num; /* slot number */ + + int type; /* CA interface this slot supports */ + #define CA_CI 1 /* CI high level interface */ + #define CA_CI_LINK 2 /* CI link layer level interface */ + #define CA_CI_PHYS 4 /* CI physical layer level interface */ + #define CA_DESCR 8 /* built-in descrambler */ + #define CA_SC 128 /* simple smart card interface */ + + unsigned int flags; + #define CA_CI_MODULE_PRESENT 1 /* module (or card) inserted */ + #define CA_CI_MODULE_READY 2 + } ca_slot_info_t; + +This CI interface follows the CI high level interface, which is not +implemented by most applications. Hence this area is revisited. + +This CI interface is quite different in the case that it tries to +accommodate all other CI based devices, that fall into the other categories. + +This means that this CI interface handles the EN50221 style tags in the +Application layer only and no session management is taken care of by the +application. The driver/hardware will take care of all that. + +This interface is purely an EN50221 interface exchanging APDU's. This +means that no session management, link layer or a transport layer do +exist in this case in the application to driver communication. It is +as simple as that. The driver/hardware has to take care of that. + +With this High Level CI interface, the interface can be defined with the +regular ioctls. + +All these ioctls are also valid for the High level CI interface + +#define CA_RESET _IO('o', 128) +#define CA_GET_CAP _IOR('o', 129, ca_caps_t) +#define CA_GET_SLOT_INFO _IOR('o', 130, ca_slot_info_t) +#define CA_GET_DESCR_INFO _IOR('o', 131, ca_descr_info_t) +#define CA_GET_MSG _IOR('o', 132, ca_msg_t) +#define CA_SEND_MSG _IOW('o', 133, ca_msg_t) +#define CA_SET_DESCR _IOW('o', 134, ca_descr_t) + + +On querying the device, the device yields information thus: + +.. code-block:: none + + CA_GET_SLOT_INFO + ---------------------------- + Command = [info] + APP: Number=[1] + APP: Type=[1] + APP: flags=[1] + APP: CI High level interface + APP: CA/CI Module Present + + CA_GET_CAP + ---------------------------- + Command = [caps] + APP: Slots=[1] + APP: Type=[1] + APP: Descrambler keys=[16] + APP: Type=[1] + + CA_SEND_MSG + ---------------------------- + Descriptors(Program Level)=[ 09 06 06 04 05 50 ff f1] + Found CA descriptor @ program level + + (20) ES type=[2] ES pid=[201] ES length =[0 (0x0)] + (25) ES type=[4] ES pid=[301] ES length =[0 (0x0)] + ca_message length is 25 (0x19) bytes + EN50221 CA MSG=[ 9f 80 32 19 03 01 2d d1 f0 08 01 09 06 06 04 05 50 ff f1 02 e0 c9 00 00 04 e1 2d 00 00] + + +Not all ioctl's are implemented in the driver from the API, the other +features of the hardware that cannot be implemented by the API are achieved +using the CA_GET_MSG and CA_SEND_MSG ioctls. An EN50221 style wrapper is +used to exchange the data to maintain compatibility with other hardware. + +.. code-block:: c + + /* a message to/from a CI-CAM */ + typedef struct ca_msg { + unsigned int index; + unsigned int type; + unsigned int length; + unsigned char msg[256]; + } ca_msg_t; + + +The flow of data can be described thus, + +.. code-block:: none + + App (User) + ----- + parse + | + | + v + en50221 APDU (package) + -------------------------------------- + | | | High Level CI driver + | | | + | v | + | en50221 APDU (unpackage) | + | | | + | | | + | v | + | sanity checks | + | | | + | | | + | v | + | do (H/W dep) | + -------------------------------------- + | Hardware + | + v + +The High Level CI interface uses the EN50221 DVB standard, following a +standard ensures futureproofness. diff --git a/Documentation/userspace-api/media/dvb/demux.rst b/Documentation/userspace-api/media/dvb/demux.rst new file mode 100644 index 000000000..ef05abcf1 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/demux.rst @@ -0,0 +1,23 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. _dvb_demux: + +####################### +Digital TV Demux Device +####################### + +The Digital TV demux device controls the MPEG-TS filters for the +digital TV. If the driver and hardware supports, those filters are +implemented at the hardware. Otherwise, the Kernel provides a software +emulation. + +It can be accessed through ``/dev/adapter?/demux?``. Data types and +ioctl definitions can be accessed by including ``linux/dvb/dmx.h`` in +your application. + + +.. toctree:: + :maxdepth: 1 + + dmx_types + dmx_fcalls diff --git a/Documentation/userspace-api/media/dvb/dmx-add-pid.rst b/Documentation/userspace-api/media/dvb/dmx-add-pid.rst new file mode 100644 index 000000000..ea0c7dd91 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx-add-pid.rst @@ -0,0 +1,47 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.dmx + +.. _DMX_ADD_PID: + +=========== +DMX_ADD_PID +=========== + +Name +---- + +DMX_ADD_PID + +Synopsis +-------- + +.. c:macro:: DMX_ADD_PID + +``int ioctl(fd, DMX_ADD_PID, __u16 *pid)`` + +Arguments +--------- + +``fd`` + File descriptor returned by :c:func:`open()`. + +``pid`` + PID number to be filtered. + +Description +----------- + +This ioctl call allows to add multiple PIDs to a transport stream filter +previously set up with :ref:`DMX_SET_PES_FILTER` and output equal to +:c:type:`DMX_OUT_TSDEMUX_TAP `. + +Return Value +------------ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/dmx-expbuf.rst b/Documentation/userspace-api/media/dvb/dmx-expbuf.rst new file mode 100644 index 000000000..5cdc2035e --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx-expbuf.rst @@ -0,0 +1,87 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.dmx + +.. _DMX_EXPBUF: + +**************** +ioctl DMX_EXPBUF +**************** + +Name +==== + +DMX_EXPBUF - Export a buffer as a DMABUF file descriptor. + +.. warning:: this API is still experimental + +Synopsis +======== + +.. c:macro:: DMX_EXPBUF + +``int ioctl(int fd, DMX_EXPBUF, struct dmx_exportbuffer *argp)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``argp`` + Pointer to struct :c:type:`dmx_exportbuffer`. + +Description +=========== + +This ioctl is an extension to the memory mapping I/O method. +It can be used to export a buffer as a DMABUF file at any time after +buffers have been allocated with the :ref:`DMX_REQBUFS` ioctl. + +To export a buffer, applications fill struct :c:type:`dmx_exportbuffer`. +Applications must set the ``index`` field. Valid index numbers +range from zero to the number of buffers allocated with :ref:`DMX_REQBUFS` +(struct :c:type:`dmx_requestbuffers` ``count``) minus one. +Additional flags may be posted in the ``flags`` field. Refer to a manual +for open() for details. Currently only O_CLOEXEC, O_RDONLY, O_WRONLY, +and O_RDWR are supported. +All other fields must be set to zero. In the +case of multi-planar API, every plane is exported separately using +multiple :ref:`DMX_EXPBUF` calls. + +After calling :ref:`DMX_EXPBUF` the ``fd`` field will be set by a +driver, on success. This is a DMABUF file descriptor. The application may +pass it to other DMABUF-aware devices. It is recommended to close a DMABUF +file when it is no longer used to allow the associated memory to be reclaimed. + +Examples +======== + +.. code-block:: c + + int buffer_export(int v4lfd, enum dmx_buf_type bt, int index, int *dmafd) + { + struct dmx_exportbuffer expbuf; + + memset(&expbuf, 0, sizeof(expbuf)); + expbuf.type = bt; + expbuf.index = index; + if (ioctl(v4lfd, DMX_EXPBUF, &expbuf) == -1) { + perror("DMX_EXPBUF"); + return -1; + } + + *dmafd = expbuf.fd; + + return 0; + } + +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 ` chapter. + +EINVAL + A queue is not in MMAP mode or DMABUF exporting is not supported or + ``flags`` or ``index`` fields are invalid. diff --git a/Documentation/userspace-api/media/dvb/dmx-fclose.rst b/Documentation/userspace-api/media/dvb/dmx-fclose.rst new file mode 100644 index 000000000..719ac1d4f --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx-fclose.rst @@ -0,0 +1,42 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.dmx + +.. _dmx_fclose: + +======================== +Digital TV demux close() +======================== + +Name +---- + +Digital TV demux close() + +Synopsis +-------- + +.. c:function:: int close(int fd) + +Arguments +--------- + +``fd`` + File descriptor returned by a previous call to + :c:func:`open()`. + +Description +----------- + +This system call deactivates and deallocates a filter that was +previously allocated via the :c:func:`open()` call. + +Return Value +------------ + +On success 0 is returned. + +On error, -1 is returned and the ``errno`` variable is set +appropriately. + +The generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/dmx-fopen.rst b/Documentation/userspace-api/media/dvb/dmx-fopen.rst new file mode 100644 index 000000000..50b36eb43 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx-fopen.rst @@ -0,0 +1,88 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.dmx + +.. _dmx_fopen: + +======================= +Digital TV demux open() +======================= + +Name +---- + +Digital TV demux open() + +Synopsis +-------- + +.. c:function:: int open(const char *deviceName, int flags) + +Arguments +--------- + +``name`` + Name of specific Digital TV demux device. + +``flags`` + A bit-wise OR of the following flags: + +.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + :widths: 1 16 + + - + - ``O_RDONLY`` + - read-only access + + - + - ``O_RDWR`` + - read/write access + + - + - ``O_NONBLOCK`` + - open in non-blocking mode + (blocking mode is the default) + +Description +----------- + +This system call, used with a device name of ``/dev/dvb/adapter?/demux?``, +allocates a new filter and returns a handle which can be used for +subsequent control of that filter. This call has to be made for each +filter to be used, i.e. every returned file descriptor is a reference to +a single filter. ``/dev/dvb/adapter?/dvr?`` is a logical device to be used +for retrieving Transport Streams for digital video recording. When +reading from this device a transport stream containing the packets from +all PES filters set in the corresponding demux device +(``/dev/dvb/adapter?/demux?``) having the output set to ``DMX_OUT_TS_TAP``. +A recorded Transport Stream is replayed by writing to this device. + +The significance of blocking or non-blocking mode is described in the +documentation for functions where there is a difference. It does not +affect the semantics of the ``open()`` call itself. A device opened +in blocking mode can later be put into non-blocking mode (and vice versa) +using the ``F_SETFL`` command of the fcntl system call. + +Return Value +------------ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + :widths: 1 16 + + - - ``EMFILE`` + - "Too many open files", i.e. no more filters available. + +The generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/dmx-fread.rst b/Documentation/userspace-api/media/dvb/dmx-fread.rst new file mode 100644 index 000000000..88c4cddf7 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx-fread.rst @@ -0,0 +1,77 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.dmx + +.. _dmx_fread: + +======================= +Digital TV demux read() +======================= + +Name +---- + +Digital TV demux read() + +Synopsis +-------- + +.. c:function:: size_t read(int fd, void *buf, size_t count) + +Arguments +--------- + +``fd`` + File descriptor returned by a previous call to :c:func:`open()`. + + ``buf`` + Buffer to be filled + +``count`` + Max number of bytes to read + +Description +----------- + +This system call returns filtered data, which might be section or Packetized +Elementary Stream (PES) data. The filtered data is transferred from +the driver's internal circular buffer to ``buf``. The maximum amount of data +to be transferred is implied by count. + +.. note:: + + if a section filter created with + :c:type:`DMX_CHECK_CRC ` flag set, + data that fails on CRC check will be silently ignored. + +Return Value +------------ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + :widths: 1 16 + + - - ``EWOULDBLOCK`` + - No data to return and ``O_NONBLOCK`` was specified. + + - - ``EOVERFLOW`` + - The filtered data was not read from the buffer in due time, + resulting in non-read data being lost. The buffer is flushed. + + - - ``ETIMEDOUT`` + - The section was not loaded within the stated timeout period. + See ioctl :ref:`DMX_SET_FILTER` for how to set a timeout. + + - - ``EFAULT`` + - The driver failed to write to the callers buffer due to an + invalid \*buf pointer. + +The generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/dmx-fwrite.rst b/Documentation/userspace-api/media/dvb/dmx-fwrite.rst new file mode 100644 index 000000000..e11ee0ba8 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx-fwrite.rst @@ -0,0 +1,70 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.dmx + +.. _dmx_fwrite: + +======================== +Digital TV demux write() +======================== + +Name +---- + +Digital TV demux write() + +Synopsis +-------- + +.. c:function:: ssize_t write(int fd, const void *buf, size_t count) + +Arguments +--------- + +``fd`` + File descriptor returned by a previous call to :c:func:`open()`. + +``buf`` + Buffer with data to be written + +``count`` + Number of bytes at the buffer + +Description +----------- + +This system call is only provided by the logical device +``/dev/dvb/adapter?/dvr?``, associated with the physical demux device that +provides the actual DVR functionality. It is used for replay of a +digitally recorded Transport Stream. Matching filters have to be defined +in the corresponding physical demux device, ``/dev/dvb/adapter?/demux?``. +The amount of data to be transferred is implied by count. + +Return Value +------------ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + :widths: 1 16 + + - - ``EWOULDBLOCK`` + - No data was written. This might happen if ``O_NONBLOCK`` was + specified and there is no more buffer space available (if + ``O_NONBLOCK`` is not specified the function will block until buffer + space is available). + + - - ``EBUSY`` + - This error code indicates that there are conflicting requests. The + corresponding demux device is setup to receive data from the + front- end. Make sure that these filters are stopped and that the + filters with input set to ``DMX_IN_DVR`` are started. + +The generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/dmx-get-pes-pids.rst b/Documentation/userspace-api/media/dvb/dmx-get-pes-pids.rst new file mode 100644 index 000000000..4f5f0505c --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx-get-pes-pids.rst @@ -0,0 +1,62 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.dmx + +.. _DMX_GET_PES_PIDS: + +================ +DMX_GET_PES_PIDS +================ + +Name +---- + +DMX_GET_PES_PIDS + +Synopsis +-------- + +.. c:macro:: DMX_GET_PES_PIDS + +``int ioctl(fd, DMX_GET_PES_PIDS, __u16 pids[5])`` + +Arguments +--------- + +``fd`` + File descriptor returned by :c:func:`open()`. + +``pids`` + Array used to store 5 Program IDs. + +Description +----------- + +This ioctl allows to query a DVB device to return the first PID used +by audio, video, textext, subtitle and PCR programs on a given service. +They're stored as: + +======================= ======== ======================================= +PID element position content +======================= ======== ======================================= +pids[DMX_PES_AUDIO] 0 first audio PID +pids[DMX_PES_VIDEO] 1 first video PID +pids[DMX_PES_TELETEXT] 2 first teletext PID +pids[DMX_PES_SUBTITLE] 3 first subtitle PID +pids[DMX_PES_PCR] 4 first Program Clock Reference PID +======================= ======== ======================================= + +.. note:: + + A value equal to 0xffff means that the PID was not filled by the + Kernel. + +Return Value +------------ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +The generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/dmx-get-stc.rst b/Documentation/userspace-api/media/dvb/dmx-get-stc.rst new file mode 100644 index 000000000..6ada74f6e --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx-get-stc.rst @@ -0,0 +1,64 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.dmx + +.. _DMX_GET_STC: + +=========== +DMX_GET_STC +=========== + +Name +---- + +DMX_GET_STC + +Synopsis +-------- + +.. c:macro:: DMX_GET_STC + +``int ioctl(int fd, DMX_GET_STC, struct dmx_stc *stc)`` + +Arguments +--------- + +``fd`` + File descriptor returned by :c:func:`open()`. + +``stc`` + Pointer to :c:type:`dmx_stc` where the stc data is to be stored. + +Description +----------- + +This ioctl call returns the current value of the system time counter +(which is driven by a PES filter of type :c:type:`DMX_PES_PCR `). +Some hardware supports more than one STC, so you must specify which one by +setting the :c:type:`num ` field of stc before the ioctl (range 0...n). +The result is returned in form of a ratio with a 64 bit numerator +and a 32 bit denominator, so the real 90kHz STC value is +``stc->stc / stc->base``. + +Return Value +------------ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + :widths: 1 16 + + - .. row 1 + + - ``EINVAL`` + + - Invalid stc number. + +The generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/dmx-mmap.rst b/Documentation/userspace-api/media/dvb/dmx-mmap.rst new file mode 100644 index 000000000..8826c6226 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx-mmap.rst @@ -0,0 +1,115 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.dmx + +.. _dmx-mmap: + +***************** +Digital TV mmap() +***************** + +Name +==== + +dmx-mmap - Map device memory into application address space + +.. warning:: this API is still experimental + +Synopsis +======== + +.. code-block:: c + + #include + #include + +.. c:function:: void *mmap( void *start, size_t length, int prot, int flags, int fd, off_t offset ) + +Arguments +========= + +``start`` + Map the buffer to this address in the application's address space. + When the ``MAP_FIXED`` flag is specified, ``start`` must be a + multiple of the pagesize and mmap will fail when the specified + address cannot be used. Use of this option is discouraged; + applications should just specify a ``NULL`` pointer here. + +``length`` + Length of the memory area to map. This must be a multiple of the + DVB packet length (188, on most drivers). + +``prot`` + The ``prot`` argument describes the desired memory protection. + Regardless of the device type and the direction of data exchange it + should be set to ``PROT_READ`` | ``PROT_WRITE``, permitting read + and write access to image buffers. Drivers should support at least + this combination of flags. + +``flags`` + The ``flags`` parameter specifies the type of the mapped object, + mapping options and whether modifications made to the mapped copy of + the page are private to the process or are to be shared with other + references. + + ``MAP_FIXED`` requests that the driver selects no other address than + the one specified. If the specified address cannot be used, + :c:func:`mmap()` will fail. If ``MAP_FIXED`` is specified, + ``start`` must be a multiple of the pagesize. Use of this option is + discouraged. + + One of the ``MAP_SHARED`` or ``MAP_PRIVATE`` flags must be set. + ``MAP_SHARED`` allows applications to share the mapped memory with + other (e. g. child-) processes. + + .. note:: + + The Linux Digital TV applications should not set the + ``MAP_PRIVATE``, ``MAP_DENYWRITE``, ``MAP_EXECUTABLE`` or ``MAP_ANON`` + flags. + +``fd`` + File descriptor returned by :c:func:`open()`. + +``offset`` + Offset of the buffer in device memory, as returned by + :ref:`DMX_QUERYBUF` ioctl. + +Description +=========== + +The :c:func:`mmap()` function asks to map ``length`` bytes starting at +``offset`` in the memory of the device specified by ``fd`` into the +application address space, preferably at address ``start``. This latter +address is a hint only, and is usually specified as 0. + +Suitable length and offset parameters are queried with the +:ref:`DMX_QUERYBUF` ioctl. Buffers must be allocated with the +:ref:`DMX_REQBUFS` ioctl before they can be queried. + +To unmap buffers the :c:func:`munmap()` function is used. + +Return Value +============ + +On success :c:func:`mmap()` returns a pointer to the mapped buffer. On +error ``MAP_FAILED`` (-1) is returned, and the ``errno`` variable is set +appropriately. Possible error codes are: + +EBADF + ``fd`` is not a valid file descriptor. + +EACCES + ``fd`` is not open for reading and writing. + +EINVAL + The ``start`` or ``length`` or ``offset`` are not suitable. (E. g. + they are too large, or not aligned on a ``PAGESIZE`` boundary.) + + The ``flags`` or ``prot`` value is not supported. + + No buffers have been allocated with the + :ref:`DMX_REQBUFS` ioctl. + +ENOMEM + Not enough physical or virtual memory was available to complete the + request. diff --git a/Documentation/userspace-api/media/dvb/dmx-munmap.rst b/Documentation/userspace-api/media/dvb/dmx-munmap.rst new file mode 100644 index 000000000..66bbc11e5 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx-munmap.rst @@ -0,0 +1,52 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.dmx + +.. _dmx-munmap: + +************ +DVB munmap() +************ + +Name +==== + +dmx-munmap - Unmap device memory + +.. warning:: This API is still experimental. + +Synopsis +======== + +.. code-block:: c + + #include + #include + +.. c:function:: int munmap( void *start, size_t length ) + +Arguments +========= + +``start`` + Address of the mapped buffer as returned by the + :c:func:`mmap()` function. + +``length`` + Length of the mapped buffer. This must be the same value as given to + :c:func:`mmap()`. + +Description +=========== + +Unmaps a previously with the :c:func:`mmap()` function mapped +buffer and frees it, if possible. + +Return Value +============ + +On success :c:func:`munmap()` returns 0, on failure -1 and the +``errno`` variable is set appropriately: + +EINVAL + The ``start`` or ``length`` is incorrect, or no buffers have been + mapped yet. diff --git a/Documentation/userspace-api/media/dvb/dmx-qbuf.rst b/Documentation/userspace-api/media/dvb/dmx-qbuf.rst new file mode 100644 index 000000000..1a13a3383 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx-qbuf.rst @@ -0,0 +1,85 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.dmx + +.. _DMX_QBUF: + +************************* +ioctl DMX_QBUF, DMX_DQBUF +************************* + +Name +==== + +DMX_QBUF - DMX_DQBUF - Exchange a buffer with the driver + +.. warning:: this API is still experimental + +Synopsis +======== + +.. c:macro:: DMX_QBUF + +``int ioctl(int fd, DMX_QBUF, struct dmx_buffer *argp)`` + +.. c:macro:: DMX_DQBUF + +``int ioctl(int fd, DMX_DQBUF, struct dmx_buffer *argp)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``argp`` + Pointer to struct :c:type:`dmx_buffer`. + +Description +=========== + +Applications call the ``DMX_QBUF`` ioctl to enqueue an empty +(capturing) or filled (output) buffer in the driver's incoming queue. +The semantics depend on the selected I/O method. + +To enqueue a buffer applications set the ``index`` field. Valid index +numbers range from zero to the number of buffers allocated with +:ref:`DMX_REQBUFS` (struct :c:type:`dmx_requestbuffers` ``count``) minus +one. The contents of the struct :c:type:`dmx_buffer` returned +by a :ref:`DMX_QUERYBUF` ioctl will do as well. + +When ``DMX_QBUF`` is called with a pointer to this structure, it locks the +memory pages of the buffer in physical memory, so they cannot be swapped +out to disk. Buffers remain locked until dequeued, until the +device is closed. + +Applications call the ``DMX_DQBUF`` ioctl to dequeue a filled +(capturing) buffer from the driver's outgoing queue. +They just set the ``index`` field with the buffer ID to be queued. +When ``DMX_DQBUF`` is called with a pointer to struct :c:type:`dmx_buffer`, +the driver fills the remaining fields or returns an error code. + +By default ``DMX_DQBUF`` blocks when no buffer is in the outgoing +queue. When the ``O_NONBLOCK`` flag was given to the +:c:func:`open()` function, ``DMX_DQBUF`` returns +immediately with an ``EAGAIN`` error code when no buffer is available. + +The struct :c:type:`dmx_buffer` structure is specified in +:ref:`buffer`. + +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 ` chapter. + +EAGAIN + Non-blocking I/O has been selected using ``O_NONBLOCK`` and no + buffer was in the outgoing queue. + +EINVAL + The ``index`` is out of bounds, or no buffers have been allocated yet. + +EIO + ``DMX_DQBUF`` failed due to an internal error. Can also indicate + temporary problems like signal loss or CRC errors. diff --git a/Documentation/userspace-api/media/dvb/dmx-querybuf.rst b/Documentation/userspace-api/media/dvb/dmx-querybuf.rst new file mode 100644 index 000000000..08ee9853d --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx-querybuf.rst @@ -0,0 +1,64 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.dmx + +.. _DMX_QUERYBUF: + +****************** +ioctl DMX_QUERYBUF +****************** + +Name +==== + +DMX_QUERYBUF - Query the status of a buffer + +.. warning:: this API is still experimental + +Synopsis +======== + +.. c:macro:: DMX_QUERYBUF + +``int ioctl(int fd, DMX_QUERYBUF, struct dvb_buffer *argp)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``argp`` + Pointer to struct :c:type:`dvb_buffer`. + +Description +=========== + +This ioctl is part of the mmap streaming I/O method. It can +be used to query the status of a buffer at any time after buffers have +been allocated with the :ref:`DMX_REQBUFS` ioctl. + +Applications set the ``index`` field. Valid index numbers range from zero +to the number of buffers allocated with :ref:`DMX_REQBUFS` +(struct :c:type:`dvb_requestbuffers` ``count``) minus one. + +After calling :ref:`DMX_QUERYBUF` with a pointer to this structure, +drivers return an error code or fill the rest of the structure. + +On success, the ``offset`` will contain the offset of the buffer from the +start of the device memory, the ``length`` field its size, and the +``bytesused`` the number of bytes occupied by data in the buffer (payload). + +Return Value +============ + +On success 0 is returned, the ``offset`` will contain the offset of the +buffer from the start of the device memory, the ``length`` field its size, +and the ``bytesused`` the number of bytes occupied by data in the buffer +(payload). + +On error it returns -1 and the ``errno`` variable is set +appropriately. The generic error codes are described at the +:ref:`Generic Error Codes ` chapter. + +EINVAL + The ``index`` is out of bounds. diff --git a/Documentation/userspace-api/media/dvb/dmx-remove-pid.rst b/Documentation/userspace-api/media/dvb/dmx-remove-pid.rst new file mode 100644 index 000000000..f75b33e5e --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx-remove-pid.rst @@ -0,0 +1,48 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.dmx + +.. _DMX_REMOVE_PID: + +============== +DMX_REMOVE_PID +============== + +Name +---- + +DMX_REMOVE_PID + +Synopsis +-------- + +.. c:macro:: DMX_REMOVE_PID + +``int ioctl(fd, DMX_REMOVE_PID, __u16 *pid)`` + +Arguments +--------- + +``fd`` + File descriptor returned by :c:func:`open()`. + +``pid`` + PID of the PES filter to be removed. + +Description +----------- + +This ioctl call allows to remove a PID when multiple PIDs are set on a +transport stream filter, e. g. a filter previously set up with output +equal to :c:type:`DMX_OUT_TSDEMUX_TAP `, created via either +:ref:`DMX_SET_PES_FILTER` or :ref:`DMX_ADD_PID`. + +Return Value +------------ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +The generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/dmx-reqbufs.rst b/Documentation/userspace-api/media/dvb/dmx-reqbufs.rst new file mode 100644 index 000000000..d2bb1909e --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx-reqbufs.rst @@ -0,0 +1,75 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.dmx + +.. _DMX_REQBUFS: + +***************** +ioctl DMX_REQBUFS +***************** + +Name +==== + +DMX_REQBUFS - Initiate Memory Mapping and/or DMA buffer I/O + +.. warning:: this API is still experimental + +Synopsis +======== + +.. c:macro:: DMX_REQBUFS + +``int ioctl(int fd, DMX_REQBUFS, struct dmx_requestbuffers *argp)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``argp`` + Pointer to struct :c:type:`dmx_requestbuffers`. + +Description +=========== + +This ioctl is used to initiate a memory mapped or DMABUF based demux I/O. + +Memory mapped buffers are located in device memory and must be allocated +with this ioctl before they can be mapped into the application's address +space. User buffers are allocated by applications themselves, and this +ioctl is merely used to switch the driver into user pointer I/O mode and +to setup some internal structures. Similarly, DMABUF buffers are +allocated by applications through a device driver, and this ioctl only +configures the driver into DMABUF I/O mode without performing any direct +allocation. + +To allocate device buffers applications initialize all fields of the +struct :c:type:`dmx_requestbuffers` structure. They set the ``count`` field +to the desired number of buffers, and ``size`` to the size of each +buffer. + +When the ioctl is called with a pointer to this structure, the driver will +attempt to allocate the requested number of buffers and it stores the actual +number allocated in the ``count`` field. The ``count`` can be smaller than the number requested, even zero, when the driver runs out of free memory. A larger +number is also possible when the driver requires more buffers to +function correctly. The actual allocated buffer size can is returned +at ``size``, and can be smaller than what's requested. + +When this I/O method is not supported, the ioctl returns an ``EOPNOTSUPP`` +error code. + +Applications can call :ref:`DMX_REQBUFS` again to change the number of +buffers, however this cannot succeed when any buffers are still mapped. +A ``count`` value of zero frees all buffers, after aborting or finishing +any DMA in progress. + +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 ` chapter. + +EOPNOTSUPP + The the requested I/O method is not supported. diff --git a/Documentation/userspace-api/media/dvb/dmx-set-buffer-size.rst b/Documentation/userspace-api/media/dvb/dmx-set-buffer-size.rst new file mode 100644 index 000000000..13ce4092c --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx-set-buffer-size.rst @@ -0,0 +1,48 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.dmx + +.. _DMX_SET_BUFFER_SIZE: + +=================== +DMX_SET_BUFFER_SIZE +=================== + +Name +---- + +DMX_SET_BUFFER_SIZE + +Synopsis +-------- + +.. c:macro:: DMX_SET_BUFFER_SIZE + +``int ioctl(int fd, DMX_SET_BUFFER_SIZE, unsigned long size)`` + +Arguments +--------- + +``fd`` + File descriptor returned by :c:func:`open()`. + +``size`` + Unsigned long size + +Description +----------- + +This ioctl call is used to set the size of the circular buffer used for +filtered data. The default size is two maximum sized sections, i.e. if +this function is not called a buffer size of ``2 * 4096`` bytes will be +used. + +Return Value +------------ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +The generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/dmx-set-filter.rst b/Documentation/userspace-api/media/dvb/dmx-set-filter.rst new file mode 100644 index 000000000..1b8c8071b --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx-set-filter.rst @@ -0,0 +1,55 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.dmx + +.. _DMX_SET_FILTER: + +============== +DMX_SET_FILTER +============== + +Name +---- + +DMX_SET_FILTER + +Synopsis +-------- + +.. c:macro:: DMX_SET_FILTER + +``int ioctl(int fd, DMX_SET_FILTER, struct dmx_sct_filter_params *params)`` + +Arguments +--------- + +``fd`` + File descriptor returned by :c:func:`open()`. + +``params`` + + Pointer to structure containing filter parameters. + +Description +----------- + +This ioctl call sets up a filter according to the filter and mask +parameters provided. A timeout may be defined stating number of seconds +to wait for a section to be loaded. A value of 0 means that no timeout +should be applied. Finally there is a flag field where it is possible to +state whether a section should be CRC-checked, whether the filter should +be a "one-shot" filter, i.e. if the filtering operation should be +stopped after the first section is received, and whether the filtering +operation should be started immediately (without waiting for a +:ref:`DMX_START` ioctl call). If a filter was previously set-up, this +filter will be canceled, and the receive buffer will be flushed. + +Return Value +------------ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +The generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/dmx-set-pes-filter.rst b/Documentation/userspace-api/media/dvb/dmx-set-pes-filter.rst new file mode 100644 index 000000000..5bb682e4a --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx-set-pes-filter.rst @@ -0,0 +1,64 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.dmx + +.. _DMX_SET_PES_FILTER: + +================== +DMX_SET_PES_FILTER +================== + +Name +---- + +DMX_SET_PES_FILTER + +Synopsis +-------- + +.. c:macro:: DMX_SET_PES_FILTER + +``int ioctl(int fd, DMX_SET_PES_FILTER, struct dmx_pes_filter_params *params)`` + +Arguments +--------- + +``fd`` + File descriptor returned by :c:func:`open()`. + +``params`` + Pointer to structure containing filter parameters. + +Description +----------- + +This ioctl call sets up a PES filter according to the parameters +provided. By a PES filter is meant a filter that is based just on the +packet identifier (PID), i.e. no PES header or payload filtering +capability is supported. + +Return Value +------------ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + :widths: 1 16 + + - .. row 1 + + - ``EBUSY`` + + - This error code indicates that there are conflicting requests. + There are active filters filtering data from another input source. + Make sure that these filters are stopped before starting this + filter. + +The generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/dmx-start.rst b/Documentation/userspace-api/media/dvb/dmx-start.rst new file mode 100644 index 000000000..aedccf952 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx-start.rst @@ -0,0 +1,65 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.dmx + +.. _DMX_START: + +========= +DMX_START +========= + +Name +---- + +DMX_START + +Synopsis +-------- + +.. c:macro:: DMX_START + +``int ioctl(int fd, DMX_START)`` + +Arguments +--------- + +``fd`` + File descriptor returned by :c:func:`open()`. + +Description +----------- + +This ioctl call is used to start the actual filtering operation defined +via the ioctl calls :ref:`DMX_SET_FILTER` or :ref:`DMX_SET_PES_FILTER`. + +Return Value +------------ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + + - .. row 1 + + - ``EINVAL`` + + - Invalid argument, i.e. no filtering parameters provided via the + :ref:`DMX_SET_FILTER` or :ref:`DMX_SET_PES_FILTER` ioctls. + + - .. row 2 + + - ``EBUSY`` + + - This error code indicates that there are conflicting requests. + There are active filters filtering data from another input source. + Make sure that these filters are stopped before starting this + filter. + +The generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/dmx-stop.rst b/Documentation/userspace-api/media/dvb/dmx-stop.rst new file mode 100644 index 000000000..8661e6772 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx-stop.rst @@ -0,0 +1,44 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.dmx + +.. _DMX_STOP: + +======== +DMX_STOP +======== + +Name +---- + +DMX_STOP + +Synopsis +-------- + +.. c:macro:: DMX_STOP + +``int ioctl(int fd, DMX_STOP)`` + +Arguments +--------- + +``fd`` + File descriptor returned by :c:func:`open()`. + +Description +----------- + +This ioctl call is used to stop the actual filtering operation defined +via the ioctl calls :ref:`DMX_SET_FILTER` or :ref:`DMX_SET_PES_FILTER` and +started via the :ref:`DMX_START` command. + +Return Value +------------ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +The generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/dmx.h.rst.exceptions b/Documentation/userspace-api/media/dvb/dmx.h.rst.exceptions new file mode 100644 index 000000000..2c219388d --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx.h.rst.exceptions @@ -0,0 +1,62 @@ +# SPDX-License-Identifier: GPL-2.0 + +# All symbols belone to this namespace +namespace DTV.dmx + +# Ignore header name +ignore define _UAPI_DVBDMX_H_ + +# Ignore limit constants +ignore define DMX_FILTER_SIZE + +# dmx_ts_pes_type_t enum symbols +replace symbol DMX_PES_AUDIO0 :c:type:`DTV.dmx.dmx_ts_pes` +replace symbol DMX_PES_VIDEO0 :c:type:`DTV.dmx.dmx_ts_pes` +replace symbol DMX_PES_TELETEXT0 :c:type:`DTV.dmx.dmx_ts_pes` +replace symbol DMX_PES_SUBTITLE0 :c:type:`DTV.dmx.dmx_ts_pes` +replace symbol DMX_PES_PCR0 :c:type:`DTV.dmx.dmx_ts_pes` +replace symbol DMX_PES_AUDIO1 :c:type:`DTV.dmx.dmx_ts_pes` +replace symbol DMX_PES_VIDEO1 :c:type:`DTV.dmx.dmx_ts_pes` +replace symbol DMX_PES_TELETEXT1 :c:type:`DTV.dmx.dmx_ts_pes` +replace symbol DMX_PES_SUBTITLE1 :c:type:`DTV.dmx.dmx_ts_pes` +replace symbol DMX_PES_PCR1 :c:type:`DTV.dmx.dmx_ts_pes` +replace symbol DMX_PES_AUDIO2 :c:type:`DTV.dmx.dmx_ts_pes` +replace symbol DMX_PES_VIDEO2 :c:type:`DTV.dmx.dmx_ts_pes` +replace symbol DMX_PES_TELETEXT2 :c:type:`DTV.dmx.dmx_ts_pes` +replace symbol DMX_PES_SUBTITLE2 :c:type:`DTV.dmx.dmx_ts_pes` +replace symbol DMX_PES_PCR2 :c:type:`DTV.dmx.dmx_ts_pes` +replace symbol DMX_PES_AUDIO3 :c:type:`DTV.dmx.dmx_ts_pes` +replace symbol DMX_PES_VIDEO3 :c:type:`DTV.dmx.dmx_ts_pes` +replace symbol DMX_PES_TELETEXT3 :c:type:`DTV.dmx.dmx_ts_pes` +replace symbol DMX_PES_SUBTITLE3 :c:type:`DTV.dmx.dmx_ts_pes` +replace symbol DMX_PES_PCR3 :c:type:`DTV.dmx.dmx_ts_pes` +replace symbol DMX_PES_OTHER :c:type:`DTV.dmx.dmx_ts_pes` + +# Ignore obsolete symbols +ignore define DMX_PES_AUDIO +ignore define DMX_PES_VIDEO +ignore define DMX_PES_TELETEXT +ignore define DMX_PES_SUBTITLE +ignore define DMX_PES_PCR + +# dmx_input_t symbols +replace symbol DMX_IN_FRONTEND :c:enum:`DTV.dmx.dmx_input` +replace symbol DMX_IN_DVR :c:enum:`DTV.dmx.dmx_input` + +# Flags for struct dmx_sct_filter_params +replace define DMX_CHECK_CRC :c:type:`DTV.dmx.dmx_sct_filter_params` +replace define DMX_ONESHOT :c:type:`DTV.dmx.dmx_sct_filter_params` +replace define DMX_IMMEDIATE_START :c:type:`DTV.dmx.dmx_sct_filter_params` + +replace symbol DMX_BUFFER_FLAG_HAD_CRC32_DISCARD :c:type:`DTV.dmx.dmx_buffer_flags` +replace symbol DMX_BUFFER_FLAG_TEI :c:type:`DTV.dmx.dmx_buffer_flags` +replace symbol DMX_BUFFER_PKT_COUNTER_MISMATCH :c:type:`DTV.dmx.dmx_buffer_flags` +replace symbol DMX_BUFFER_FLAG_DISCONTINUITY_DETECTED :c:type:`DTV.dmx.dmx_buffer_flags` +replace symbol DMX_BUFFER_FLAG_DISCONTINUITY_INDICATOR :c:type:`DTV.dmx.dmx_buffer_flags` + +replace symbol DMX_OUT_DECODER :c:type:`DTV.dmx.dmx_output` +replace symbol DMX_OUT_TAP :c:type:`DTV.dmx.dmx_output` +replace symbol DMX_OUT_TS_TAP :c:type:`DTV.dmx.dmx_output` +replace symbol DMX_OUT_TSDEMUX_TAP :c:type:`DTV.dmx.dmx_output` + +replace ioctl DMX_DQBUF dmx_qbuf diff --git a/Documentation/userspace-api/media/dvb/dmx_fcalls.rst b/Documentation/userspace-api/media/dvb/dmx_fcalls.rst new file mode 100644 index 000000000..a14e7a61f --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx_fcalls.rst @@ -0,0 +1,30 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. _dmx_fcalls: + +******************** +Demux Function Calls +******************** + +.. toctree:: + :maxdepth: 1 + + dmx-fopen + dmx-fclose + dmx-fread + dmx-fwrite + dmx-mmap + dmx-munmap + dmx-start + dmx-stop + dmx-set-filter + dmx-set-pes-filter + dmx-set-buffer-size + dmx-get-stc + dmx-get-pes-pids + dmx-add-pid + dmx-remove-pid + dmx-reqbufs + dmx-querybuf + dmx-expbuf + dmx-qbuf diff --git a/Documentation/userspace-api/media/dvb/dmx_types.rst b/Documentation/userspace-api/media/dvb/dmx_types.rst new file mode 100644 index 000000000..dd7601069 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dmx_types.rst @@ -0,0 +1,10 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.dmx + +.. _dmx_types: + +**************** +Demux Data Types +**************** + +.. kernel-doc:: include/uapi/linux/dvb/dmx.h diff --git a/Documentation/userspace-api/media/dvb/dvb-fe-read-status.rst b/Documentation/userspace-api/media/dvb/dvb-fe-read-status.rst new file mode 100644 index 000000000..fbd0548f5 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dvb-fe-read-status.rst @@ -0,0 +1,25 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. _dvb-fe-read-status: + +*************************************** +Querying frontend status and statistics +*************************************** + +Once :ref:`FE_SET_PROPERTY ` is called, the +frontend will run a kernel thread that will periodically check for the +tuner lock status and provide statistics about the quality of the +signal. + +The information about the frontend tuner locking status can be queried +using :ref:`FE_READ_STATUS`. + +Signal statistics are provided via +:ref:`FE_GET_PROPERTY`. + +.. note:: + + Most statistics require the demodulator to be fully locked + (e. g. with :c:type:`FE_HAS_LOCK ` bit set). See + :ref:`Frontend statistics indicators ` for + more details. diff --git a/Documentation/userspace-api/media/dvb/dvb-frontend-event.rst b/Documentation/userspace-api/media/dvb/dvb-frontend-event.rst new file mode 100644 index 000000000..0e2fd3a0a --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dvb-frontend-event.rst @@ -0,0 +1,15 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. c:type:: dvb_frontend_event + +*************** +frontend events +*************** + + +.. code-block:: c + + struct dvb_frontend_event { + fe_status_t status; + struct dvb_frontend_parameters parameters; + }; diff --git a/Documentation/userspace-api/media/dvb/dvb-frontend-parameters.rst b/Documentation/userspace-api/media/dvb/dvb-frontend-parameters.rst new file mode 100644 index 000000000..9dd2f5424 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dvb-frontend-parameters.rst @@ -0,0 +1,119 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. c:type:: dvb_frontend_parameters + +******************* +frontend parameters +******************* + +The kind of parameters passed to the frontend device for tuning depend +on the kind of hardware you are using. + +The struct ``dvb_frontend_parameters`` uses a 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 +:ref:`FE_GET_PROPERTY/FE_SET_PROPERTY ` +ioctl's. The new API is flexible enough to add new parameters to +existing delivery systems, and to add newer delivery systems. + +So, newer applications should use +:ref:`FE_GET_PROPERTY/FE_SET_PROPERTY ` +instead, in order to be able to support the newer System Delivery like +DVB-S2, DVB-T2, DVB-C2, ISDB, etc. + +All kinds of parameters are combined as a union in the +``dvb_frontend_parameters`` structure: + + +.. code-block:: c + + 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; + }; + +In the case of QPSK frontends the ``frequency`` 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 ``frequency`` specifies the absolute frequency and is +given in Hz. + + +.. c:type:: dvb_qpsk_parameters + +QPSK parameters +=============== + +For satellite QPSK frontends you have to use the ``dvb_qpsk_parameters`` +structure: + + +.. code-block:: c + + 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) */ + }; + + +.. c:type:: dvb_qam_parameters + +QAM parameters +============== + +for cable QAM frontend you use the ``dvb_qam_parameters`` structure: + + +.. code-block:: c + + 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) */ + }; + + +.. c:type:: dvb_vsb_parameters + +VSB parameters +============== + +ATSC frontends are supported by the ``dvb_vsb_parameters`` structure: + + +.. code-block:: c + + struct dvb_vsb_parameters { + fe_modulation_t modulation; /* modulation type (see above) */ + }; + + +.. c:type:: dvb_ofdm_parameters + +OFDM parameters +=============== + +DVB-T frontends are supported by the ``dvb_ofdm_parameters`` structure: + + +.. code-block:: c + + 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; + }; diff --git a/Documentation/userspace-api/media/dvb/dvbapi.rst b/Documentation/userspace-api/media/dvb/dvbapi.rst new file mode 100644 index 000000000..4ac0c1bc5 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dvbapi.rst @@ -0,0 +1,113 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. include:: + +.. _dvbapi: + +######################## +Part II - Digital TV API +######################## + +.. note:: + + This API is also known as Linux **DVB API**. + + It it was originally written to support the European digital TV + standard (DVB), and later extended to support all digital TV standards. + + In order to avoid confusion, within this document, it was opted to refer to + it, and to associated hardware as **Digital TV**. + + The word **DVB** is reserved to be used for: + + - the Digital TV API version + (e. g. DVB API version 3 or DVB API version 5); + - digital TV data types (enums, structs, defines, etc); + - digital TV device nodes (``/dev/dvb/...``); + - the European DVB standard. + +**Version 5.10** + +.. toctree:: + :caption: Table of Contents + :maxdepth: 5 + :numbered: + + intro + frontend + demux + ca + net + legacy_dvb_apis + examples + headers + + +********************** +Revision and Copyright +********************** + +Authors: + +- J. K. Metzler, Ralph + + - Original author of the Digital TV API documentation. + +- O. C. Metzler, Marcus + + - Original author of the Digital TV API documentation. + +- Carvalho Chehab, Mauro + + - Ported document to Docbook XML, addition of DVBv5 API, documentation gaps fix. + +**Copyright** |copy| 2002-2003 : Convergence GmbH + +**Copyright** |copy| 2009-2017 : Mauro Carvalho Chehab + +**************** +Revision History +**************** + +:revision: 2.2.0 / 2017-09-01 (*mcc*) + +Most gaps between the uAPI document and the Kernel implementation +got fixed for the non-legacy API. + +:revision: 2.1.0 / 2015-05-29 (*mcc*) + +DocBook improvements and cleanups, in order to document the system calls +on a more standard way and provide more description about the current +Digital TV API. + +:revision: 2.0.4 / 2011-05-06 (*mcc*) + +Add more information about DVBv5 API, better describing the frontend +GET/SET props ioctl's. + + +:revision: 2.0.3 / 2010-07-03 (*mcc*) + +Add some frontend capabilities flags, present on kernel, but missing at +the specs. + + +:revision: 2.0.2 / 2009-10-25 (*mcc*) + +documents FE_SET_FRONTEND_TUNE_MODE and +FE_DISHETWORK_SEND_LEGACY_CMD ioctls. + + +:revision: 2.0.1 / 2009-09-16 (*mcc*) + +Added ISDB-T test originally written by Patrick Boettcher + + +:revision: 2.0.0 / 2009-09-06 (*mcc*) + +Conversion from LaTex to DocBook XML. The contents is the same as the +original LaTex version. + + +:revision: 1.0.0 / 2003-07-24 (*rjkm*) + +Initial revision on LaTEX. diff --git a/Documentation/userspace-api/media/dvb/dvbproperty.rst b/Documentation/userspace-api/media/dvb/dvbproperty.rst new file mode 100644 index 000000000..981da20af --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dvbproperty.rst @@ -0,0 +1,126 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. _frontend-properties: + +************** +Property types +************** + +Tuning into a Digital TV physical channel and starting decoding it +requires changing a set of parameters, in order to control the tuner, +the demodulator, the Linear Low-noise Amplifier (LNA) and to set the +antenna subsystem via Satellite Equipment Control - SEC (on satellite +systems). The actual parameters are specific to each particular digital +TV standards, and may change as the digital TV specs evolves. + +In the past (up to DVB API version 3 - DVBv3), the strategy used was to have a +union with the parameters needed to tune for DVB-S, DVB-C, DVB-T and +ATSC delivery systems grouped there. The problem is that, as the second +generation standards appeared, the size of such union was not big +enough to group the structs that would be required for those new +standards. Also, extending it would break userspace. + +So, the legacy union/struct based approach was deprecated, in favor +of a properties set approach. On such approach, +:ref:`FE_GET_PROPERTY and FE_SET_PROPERTY ` are used +to setup the frontend and read its status. + +The actual action is determined by a set of dtv_property cmd/data pairs. +With one single ioctl, is possible to get/set up to 64 properties. + +This section describes the new and recommended way to set the frontend, +with supports all digital TV delivery systems. + +.. note:: + + 1. On Linux DVB API version 3, setting a frontend was done via + struct :c:type:`dvb_frontend_parameters`. + + 2. Don't use DVB API version 3 calls on hardware with supports + newer standards. Such API provides no support or a very limited + support to new standards and/or new hardware. + + 3. Nowadays, most frontends support multiple delivery systems. + Only with DVB API version 5 calls it is possible to switch between + the multiple delivery systems supported by a frontend. + + 4. DVB API version 5 is also called *S2API*, as the first + new standard added to it was DVB-S2. + +**Example**: in order to set the hardware to tune into a DVB-C channel +at 651 kHz, modulated with 256-QAM, FEC 3/4 and symbol rate of 5.217 +Mbauds, those properties should be sent to +:ref:`FE_SET_PROPERTY ` ioctl: + + :ref:`DTV_DELIVERY_SYSTEM ` = SYS_DVBC_ANNEX_A + + :ref:`DTV_FREQUENCY ` = 651000000 + + :ref:`DTV_MODULATION ` = QAM_256 + + :ref:`DTV_INVERSION ` = INVERSION_AUTO + + :ref:`DTV_SYMBOL_RATE ` = 5217000 + + :ref:`DTV_INNER_FEC ` = FEC_3_4 + + :ref:`DTV_TUNE ` + +The code that would that would do the above is show in +:ref:`dtv-prop-example`. + +.. code-block:: c + :caption: Example: Setting digital TV frontend properties + :name: dtv-prop-example + + #include + #include + #include + #include + + static struct dtv_property props[] = { + { .cmd = DTV_DELIVERY_SYSTEM, .u.data = SYS_DVBC_ANNEX_A }, + { .cmd = DTV_FREQUENCY, .u.data = 651000000 }, + { .cmd = DTV_MODULATION, .u.data = QAM_256 }, + { .cmd = DTV_INVERSION, .u.data = INVERSION_AUTO }, + { .cmd = DTV_SYMBOL_RATE, .u.data = 5217000 }, + { .cmd = DTV_INNER_FEC, .u.data = FEC_3_4 }, + { .cmd = DTV_TUNE } + }; + + static struct dtv_properties dtv_prop = { + .num = 6, .props = props + }; + + int main(void) + { + int fd = open("/dev/dvb/adapter0/frontend0", O_RDWR); + + if (!fd) { + perror ("open"); + return -1; + } + if (ioctl(fd, FE_SET_PROPERTY, &dtv_prop) == -1) { + perror("ioctl"); + return -1; + } + printf("Frontend set\\n"); + return 0; + } + +.. attention:: While it is possible to directly call the Kernel code like the + above example, it is strongly recommended to use + `libdvbv5 `__, as it + provides abstraction to work with the supported digital TV standards and + provides methods for usual operations like program scanning and to + read/write channel descriptor files. + +.. toctree:: + :maxdepth: 1 + + fe_property_parameters + frontend-stat-properties + frontend-property-terrestrial-systems + frontend-property-cable-systems + frontend-property-satellite-systems + frontend-header diff --git a/Documentation/userspace-api/media/dvb/dvbstb.svg b/Documentation/userspace-api/media/dvb/dvbstb.svg new file mode 100644 index 000000000..6f0ba98f9 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/dvbstb.svg @@ -0,0 +1,17 @@ + + +image/svg+xmlAntenna +Frontend +CA +Demux +SEC +Audio +Video +TV +Decoder +Decoder + diff --git a/Documentation/userspace-api/media/dvb/examples.rst b/Documentation/userspace-api/media/dvb/examples.rst new file mode 100644 index 000000000..086587c65 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/examples.rst @@ -0,0 +1,16 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. _dvb_examples: + +******** +Examples +******** + +In the past, we used to have a set of examples here. However, those +examples got out of date and doesn't even compile nowadays. + +Also, nowadays, the best is to use the libdvbv5 DVB API nowadays, +with is fully documented. + +Please refer to the `libdvbv5 `__ +for updated/recommended examples. diff --git a/Documentation/userspace-api/media/dvb/fe-bandwidth-t.rst b/Documentation/userspace-api/media/dvb/fe-bandwidth-t.rst new file mode 100644 index 000000000..904b0c33a --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-bandwidth-t.rst @@ -0,0 +1,74 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +****************** +Frontend bandwidth +****************** + +.. c:type:: fe_bandwidth + +.. flat-table:: enum fe_bandwidth + :header-rows: 1 + :stub-columns: 0 + + + - .. row 1 + + - ID + + - Description + + - .. row 2 + + - .. _BANDWIDTH-AUTO: + + ``BANDWIDTH_AUTO`` + + - Autodetect bandwidth (if supported) + + - .. row 3 + + - .. _BANDWIDTH-1-712-MHZ: + + ``BANDWIDTH_1_712_MHZ`` + + - 1.712 MHz + + - .. row 4 + + - .. _BANDWIDTH-5-MHZ: + + ``BANDWIDTH_5_MHZ`` + + - 5 MHz + + - .. row 5 + + - .. _BANDWIDTH-6-MHZ: + + ``BANDWIDTH_6_MHZ`` + + - 6 MHz + + - .. row 6 + + - .. _BANDWIDTH-7-MHZ: + + ``BANDWIDTH_7_MHZ`` + + - 7 MHz + + - .. row 7 + + - .. _BANDWIDTH-8-MHZ: + + ``BANDWIDTH_8_MHZ`` + + - 8 MHz + + - .. row 8 + + - .. _BANDWIDTH-10-MHZ: + + ``BANDWIDTH_10_MHZ`` + + - 10 MHz diff --git a/Documentation/userspace-api/media/dvb/fe-diseqc-recv-slave-reply.rst b/Documentation/userspace-api/media/dvb/fe-diseqc-recv-slave-reply.rst new file mode 100644 index 000000000..d9be817f0 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-diseqc-recv-slave-reply.rst @@ -0,0 +1,47 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _FE_DISEQC_RECV_SLAVE_REPLY: + +******************************** +ioctl FE_DISEQC_RECV_SLAVE_REPLY +******************************** + +Name +==== + +FE_DISEQC_RECV_SLAVE_REPLY - Receives reply from a DiSEqC 2.0 command + +Synopsis +======== + +.. c:macro:: FE_DISEQC_RECV_SLAVE_REPLY + +``int ioctl(int fd, FE_DISEQC_RECV_SLAVE_REPLY, struct dvb_diseqc_slave_reply *argp)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``argp`` + pointer to struct :c:type:`dvb_diseqc_slave_reply`. + +Description +=========== + +Receives reply from a DiSEqC 2.0 command. + +The received message is stored at the buffer pointed by ``argp``. + +Return Value +============ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/fe-diseqc-reset-overload.rst b/Documentation/userspace-api/media/dvb/fe-diseqc-reset-overload.rst new file mode 100644 index 000000000..d36f7d115 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-diseqc-reset-overload.rst @@ -0,0 +1,45 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _FE_DISEQC_RESET_OVERLOAD: + +****************************** +ioctl FE_DISEQC_RESET_OVERLOAD +****************************** + +Name +==== + +FE_DISEQC_RESET_OVERLOAD - Restores the power to the antenna subsystem, if it was powered off due - to power overload. + +Synopsis +======== + +.. c:macro:: FE_DISEQC_RESET_OVERLOAD + +``int ioctl(int fd, FE_DISEQC_RESET_OVERLOAD, NULL)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +Description +=========== + +If the bus has been automatically powered off due to power overload, +this ioctl call restores the power to the bus. The call requires +read/write access to the device. This call has no effect if the device +is manually powered off. Not all Digital TV adapters support this ioctl. + +Return Value +============ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/fe-diseqc-send-burst.rst b/Documentation/userspace-api/media/dvb/fe-diseqc-send-burst.rst new file mode 100644 index 000000000..6ac1e5cd5 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-diseqc-send-burst.rst @@ -0,0 +1,50 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _FE_DISEQC_SEND_BURST: + +************************** +ioctl FE_DISEQC_SEND_BURST +************************** + +Name +==== + +FE_DISEQC_SEND_BURST - Sends a 22KHz tone burst for 2x1 mini DiSEqC satellite selection. + +Synopsis +======== + +.. c:macro:: FE_DISEQC_SEND_BURST + +``int ioctl(int fd, FE_DISEQC_SEND_BURST, enum fe_sec_mini_cmd tone)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``tone`` + An integer enumerated value described at :c:type:`fe_sec_mini_cmd`. + +Description +=========== + +This ioctl is used to set the generation of a 22kHz tone burst for mini +DiSEqC satellite selection for 2x1 switches. This call requires +read/write permissions. + +It provides support for what's specified at +`Digital Satellite Equipment Control (DiSEqC) - Simple "ToneBurst" Detection Circuit specification. `__ + +Return Value +============ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/fe-diseqc-send-master-cmd.rst b/Documentation/userspace-api/media/dvb/fe-diseqc-send-master-cmd.rst new file mode 100644 index 000000000..c97029def --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-diseqc-send-master-cmd.rst @@ -0,0 +1,48 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _FE_DISEQC_SEND_MASTER_CMD: + +******************************* +ioctl FE_DISEQC_SEND_MASTER_CMD +******************************* + +Name +==== + +FE_DISEQC_SEND_MASTER_CMD - Sends a DiSEqC command + +Synopsis +======== + +.. c:macro:: FE_DISEQC_SEND_MASTER_CMD + +``int ioctl(int fd, FE_DISEQC_SEND_MASTER_CMD, struct dvb_diseqc_master_cmd *argp)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``argp`` + pointer to struct + :c:type:`dvb_diseqc_master_cmd` + +Description +=========== + +Sends the DiSEqC command pointed by :c:type:`dvb_diseqc_master_cmd` +to the antenna subsystem. + +Return Value +============ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. + diff --git a/Documentation/userspace-api/media/dvb/fe-dishnetwork-send-legacy-cmd.rst b/Documentation/userspace-api/media/dvb/fe-dishnetwork-send-legacy-cmd.rst new file mode 100644 index 000000000..d1dba74c5 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-dishnetwork-send-legacy-cmd.rst @@ -0,0 +1,53 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _FE_DISHNETWORK_SEND_LEGACY_CMD: + +****************************** +FE_DISHNETWORK_SEND_LEGACY_CMD +****************************** + +Name +==== + +FE_DISHNETWORK_SEND_LEGACY_CMD + +Synopsis +======== + +.. c:macro:: FE_DISHNETWORK_SEND_LEGACY_CMD + +``int ioctl(int fd, FE_DISHNETWORK_SEND_LEGACY_CMD, unsigned long cmd)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``cmd`` + Sends the specified raw cmd to the dish via DISEqC. + +Description +=========== + +.. warning:: + This is a very obscure legacy command, used only at stv0299 + driver. Should not be used on newer drivers. + +It provides a non-standard method for selecting Diseqc voltage on the +frontend, for Dish Network legacy switches. + +As support for this ioctl were added in 2004, this means that such +dishes were already legacy in 2004. + +Return Value +============ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/fe-enable-high-lnb-voltage.rst b/Documentation/userspace-api/media/dvb/fe-enable-high-lnb-voltage.rst new file mode 100644 index 000000000..40d7320f8 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-enable-high-lnb-voltage.rst @@ -0,0 +1,52 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _FE_ENABLE_HIGH_LNB_VOLTAGE: + +******************************** +ioctl FE_ENABLE_HIGH_LNB_VOLTAGE +******************************** + +Name +==== + +FE_ENABLE_HIGH_LNB_VOLTAGE - Select output DC level between normal LNBf voltages or higher LNBf - voltages. + +Synopsis +======== + +.. c:macro:: FE_ENABLE_HIGH_LNB_VOLTAGE + +``int ioctl(int fd, FE_ENABLE_HIGH_LNB_VOLTAGE, unsigned int high)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``high`` + Valid flags: + + - 0 - normal 13V and 18V. + + - >0 - enables slightly higher voltages instead of 13/18V, in order + to compensate for long antenna cables. + +Description +=========== + +Select output DC level between normal LNBf voltages or higher LNBf +voltages between 0 (normal) or a value grater than 0 for higher +voltages. + +Return Value +============ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/fe-get-event.rst b/Documentation/userspace-api/media/dvb/fe-get-event.rst new file mode 100644 index 000000000..f63029eca --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-get-event.rst @@ -0,0 +1,67 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _FE_GET_EVENT: + +************ +FE_GET_EVENT +************ + +Name +==== + +FE_GET_EVENT + +.. attention:: This ioctl is deprecated. + +Synopsis +======== + +.. c:macro:: FE_GET_EVENT + +``int ioctl(int fd, FE_GET_EVENT, struct dvb_frontend_event *ev)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``ev`` + Points to the location where the event, if any, is to be stored. + +Description +=========== + +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. + +Return Value +============ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + + - .. row 1 + + - ``EWOULDBLOCK`` + + - There is no event pending, and the device is in non-blocking mode. + + - .. row 2 + + - ``EOVERFLOW`` + + - Overflow in event queue - one or more events were lost. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/fe-get-frontend.rst b/Documentation/userspace-api/media/dvb/fe-get-frontend.rst new file mode 100644 index 000000000..40700533e --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-get-frontend.rst @@ -0,0 +1,58 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _FE_GET_FRONTEND: + +*************** +FE_GET_FRONTEND +*************** + +Name +==== + +FE_GET_FRONTEND + +.. attention:: This ioctl is deprecated. + +Synopsis +======== + +.. c:macro:: FE_GET_FRONTEND + +``int ioctl(int fd, FE_GET_FRONTEND, struct dvb_frontend_parameters *p)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``p`` + Points to parameters for tuning operation. + +Description +=========== + +This ioctl call queries the currently effective frontend parameters. For +this command, read-only access to the device is sufficient. + +Return Value +============ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + + - .. row 1 + + - ``EINVAL`` + + - Maximum supported symbol rate reached. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/fe-get-info.rst b/Documentation/userspace-api/media/dvb/fe-get-info.rst new file mode 100644 index 000000000..2e5f02098 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-get-info.rst @@ -0,0 +1,59 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _FE_GET_INFO: + +***************** +ioctl FE_GET_INFO +***************** + +Name +==== + +FE_GET_INFO - Query Digital TV frontend capabilities and returns information +about the - front-end. This call only requires read-only access to the device. + +Synopsis +======== + +.. c:macro:: FE_GET_INFO + +``int ioctl(int fd, FE_GET_INFO, struct dvb_frontend_info *argp)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``argp`` + pointer to struct :c:type:`dvb_frontend_info` + +Description +=========== + +All Digital TV frontend devices support the :ref:`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. + +frontend capabilities +===================== + +Capabilities describe what a frontend can do. Some capabilities are +supported only on some specific frontend types. + +The frontend capabilities are described at :c:type:`fe_caps`. + +Return Value +============ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/fe-get-property.rst b/Documentation/userspace-api/media/dvb/fe-get-property.rst new file mode 100644 index 000000000..29363dc4a --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-get-property.rst @@ -0,0 +1,75 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _FE_GET_PROPERTY: + +************************************** +ioctl FE_SET_PROPERTY, FE_GET_PROPERTY +************************************** + +Name +==== + +FE_SET_PROPERTY - FE_GET_PROPERTY - FE_SET_PROPERTY sets one or more frontend properties. - FE_GET_PROPERTY returns one or more frontend properties. + +Synopsis +======== + +.. c:macro:: FE_GET_PROPERTY + +``int ioctl(int fd, FE_GET_PROPERTY, struct dtv_properties *argp)`` + +.. c:macro:: FE_SET_PROPERTY + +``int ioctl(int fd, FE_SET_PROPERTY, struct dtv_properties *argp)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``argp`` + Pointer to struct :c:type:`dtv_properties`. + +Description +=========== + +All Digital TV frontend devices support the ``FE_SET_PROPERTY`` and +``FE_GET_PROPERTY`` ioctls. The supported properties and statistics +depends on the delivery system and on the device: + +- ``FE_SET_PROPERTY:`` + + - This ioctl is used to set one or more frontend properties. + + - This is the basic command to request the frontend to tune into + some frequency and to start decoding the digital TV signal. + + - This call requires read/write access to the device. + +.. note:: + + At return, the values aren't updated to reflect the actual + parameters used. If the actual parameters are needed, an explicit + call to ``FE_GET_PROPERTY`` is needed. + +- ``FE_GET_PROPERTY:`` + + - This ioctl is used to get properties and statistics from the + frontend. + + - No properties are changed, and statistics aren't reset. + + - This call only requires read-only access to the device. + +Return Value +============ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/fe-read-ber.rst b/Documentation/userspace-api/media/dvb/fe-read-ber.rst new file mode 100644 index 000000000..f33f1dd20 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-read-ber.rst @@ -0,0 +1,49 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _FE_READ_BER: + +*********** +FE_READ_BER +*********** + +Name +==== + +FE_READ_BER + +.. attention:: This ioctl is deprecated. + +Synopsis +======== + +.. c:macro:: FE_READ_BER + +``int ioctl(int fd, FE_READ_BER, uint32_t *ber)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``ber`` + The bit error rate is stored into \*ber. + +Description +=========== + +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. + +Return Value +============ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/fe-read-signal-strength.rst b/Documentation/userspace-api/media/dvb/fe-read-signal-strength.rst new file mode 100644 index 000000000..2b7d06145 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-read-signal-strength.rst @@ -0,0 +1,49 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _FE_READ_SIGNAL_STRENGTH: + +*********************** +FE_READ_SIGNAL_STRENGTH +*********************** + +Name +==== + +FE_READ_SIGNAL_STRENGTH + +.. attention:: This ioctl is deprecated. + +Synopsis +======== + +.. c:macro:: FE_READ_SIGNAL_STRENGTH + +``int ioctl(int fd, FE_READ_SIGNAL_STRENGTH, uint16_t *strength)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``strength`` + The signal strength value is stored into \*strength. + +Description +=========== + +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. + +Return Value +============ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/fe-read-snr.rst b/Documentation/userspace-api/media/dvb/fe-read-snr.rst new file mode 100644 index 000000000..e44e559ab --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-read-snr.rst @@ -0,0 +1,49 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _FE_READ_SNR: + +*********** +FE_READ_SNR +*********** + +Name +==== + +FE_READ_SNR + +.. attention:: This ioctl is deprecated. + +Synopsis +======== + +.. c:macro:: FE_READ_SNR + +``int ioctl(int fd, FE_READ_SNR, int16_t *snr)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``snr`` + The signal-to-noise ratio is stored into \*snr. + +Description +=========== + +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. + +Return Value +============ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/fe-read-status.rst b/Documentation/userspace-api/media/dvb/fe-read-status.rst new file mode 100644 index 000000000..75c6ee60a --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-read-status.rst @@ -0,0 +1,62 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _FE_READ_STATUS: + +******************** +ioctl FE_READ_STATUS +******************** + +Name +==== + +FE_READ_STATUS - Returns status information about the front-end. This call only requires - read-only access to the device + +Synopsis +======== + +.. c:macro:: FE_READ_STATUS + +``int ioctl(int fd, FE_READ_STATUS, unsigned int *status)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``status`` + pointer to a bitmask integer filled with the values defined by enum + :c:type:`fe_status`. + +Description +=========== + +All Digital TV frontend devices support the ``FE_READ_STATUS`` ioctl. It is +used to check about the locking status of the frontend after being +tuned. The ioctl takes a pointer to an integer where the status will be +written. + +.. note:: + + The size of status is actually sizeof(enum fe_status), with + varies according with the architecture. This needs to be fixed in the + future. + +int fe_status +============= + +The fe_status parameter is used to indicate the current state and/or +state changes of the frontend hardware. It is produced using the enum +:c:type:`fe_status` values on a bitmask + +Return Value +============ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/fe-read-uncorrected-blocks.rst b/Documentation/userspace-api/media/dvb/fe-read-uncorrected-blocks.rst new file mode 100644 index 000000000..653cd99a6 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-read-uncorrected-blocks.rst @@ -0,0 +1,51 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _FE_READ_UNCORRECTED_BLOCKS: + +************************** +FE_READ_UNCORRECTED_BLOCKS +************************** + +Name +==== + +FE_READ_UNCORRECTED_BLOCKS + +.. attention:: This ioctl is deprecated. + +Synopsis +======== + +.. c:macro:: FE_READ_UNCORRECTED_BLOCKS + +``int ioctl(int fd, FE_READ_UNCORRECTED_BLOCKS, uint32_t *ublocks)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``ublocks`` + The total number of uncorrected blocks seen by the driver so far. + +Description +=========== + +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. + +Return Value +============ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/fe-set-frontend-tune-mode.rst b/Documentation/userspace-api/media/dvb/fe-set-frontend-tune-mode.rst new file mode 100644 index 000000000..56923c1a6 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-set-frontend-tune-mode.rst @@ -0,0 +1,55 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _FE_SET_FRONTEND_TUNE_MODE: + +******************************* +ioctl FE_SET_FRONTEND_TUNE_MODE +******************************* + +Name +==== + +FE_SET_FRONTEND_TUNE_MODE - Allow setting tuner mode flags to the frontend. + +Synopsis +======== + +.. c:macro:: FE_SET_FRONTEND_TUNE_MODE + +``int ioctl(int fd, FE_SET_FRONTEND_TUNE_MODE, unsigned int flags)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``flags`` + Valid flags: + + - 0 - normal tune mode + + - ``FE_TUNE_MODE_ONESHOT`` - When set, this flag will disable any + zigzagging or other "normal" tuning behaviour. Additionally, + there will be no automatic monitoring of the lock status, and + hence no frontend events will be generated. If a frontend device + is closed, this flag will be automatically turned off when the + device is reopened read-write. + +Description +=========== + +Allow setting tuner mode flags to the frontend, between 0 (normal) or +``FE_TUNE_MODE_ONESHOT`` mode + +Return Value +============ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/fe-set-frontend.rst b/Documentation/userspace-api/media/dvb/fe-set-frontend.rst new file mode 100644 index 000000000..d1b857632 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-set-frontend.rst @@ -0,0 +1,68 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _FE_SET_FRONTEND: + +*************** +FE_SET_FRONTEND +*************** + +.. attention:: This ioctl is deprecated. + +Name +==== + +FE_SET_FRONTEND + +Synopsis +======== + +.. c:macro:: FE_SET_FRONTEND + +``int ioctl(int fd, FE_SET_FRONTEND, struct dvb_frontend_parameters *p)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``p`` + Points to parameters for tuning operation. + +Description +=========== + +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 :ref:`FE_GET_EVENT` and +FrontendEvent.) If a new :ref:`FE_SET_FRONTEND` +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. + +Return Value +============ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + :widths: 1 16 + + - .. row 1 + + - ``EINVAL`` + + - Maximum supported symbol rate reached. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/fe-set-tone.rst b/Documentation/userspace-api/media/dvb/fe-set-tone.rst new file mode 100644 index 000000000..41cd7111a --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-set-tone.rst @@ -0,0 +1,56 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _FE_SET_TONE: + +***************** +ioctl FE_SET_TONE +***************** + +Name +==== + +FE_SET_TONE - Sets/resets the generation of the continuous 22kHz tone. + +Synopsis +======== + +.. c:macro:: FE_SET_TONE + +``int ioctl(int fd, FE_SET_TONE, enum fe_sec_tone_mode tone)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``tone`` + An integer enumerated value described at :c:type:`fe_sec_tone_mode` + +Description +=========== + +This ioctl is used to set the generation of the continuous 22kHz tone. +This call requires read/write permissions. + +Usually, satellite antenna subsystems require that the digital TV device +to send a 22kHz tone in order to select between high/low band on some +dual-band LNBf. It is also used to send signals to DiSEqC equipment, but +this is done using the DiSEqC ioctls. + +.. attention:: If more than one device is connected to the same antenna, + setting a tone may interfere on other devices, as they may lose the + capability of selecting the band. So, it is recommended that applications + would change to SEC_TONE_OFF when the device is not used. + +Return Value +============ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/fe-set-voltage.rst b/Documentation/userspace-api/media/dvb/fe-set-voltage.rst new file mode 100644 index 000000000..4d09ca587 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-set-voltage.rst @@ -0,0 +1,60 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _FE_SET_VOLTAGE: + +******************** +ioctl FE_SET_VOLTAGE +******************** + +Name +==== + +FE_SET_VOLTAGE - Allow setting the DC level sent to the antenna subsystem. + +Synopsis +======== + +.. c:macro:: FE_SET_VOLTAGE + +``int ioctl(int fd, FE_SET_VOLTAGE, enum fe_sec_voltage voltage)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``voltage`` + An integer enumerated value described at :c:type:`fe_sec_voltage` + +Description +=========== + +This ioctl allows to set the DC voltage level sent through the antenna +cable to 13V, 18V or off. + +Usually, a satellite antenna subsystems require that the digital TV +device to send a DC voltage to feed power to the LNBf. Depending on the +LNBf type, the polarization or the intermediate frequency (IF) of the +LNBf can controlled by the voltage level. Other devices (for example, +the ones that implement DISEqC and multipoint LNBf's don't need to +control the voltage level, provided that either 13V or 18V is sent to +power up the LNBf. + +.. attention:: if more than one device is connected to the same antenna, + setting a voltage level may interfere on other devices, as they may lose + the capability of setting polarization or IF. So, on those cases, setting + the voltage to SEC_VOLTAGE_OFF while the device is not is used is + recommended. + +Return Value +============ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/fe-type-t.rst b/Documentation/userspace-api/media/dvb/fe-type-t.rst new file mode 100644 index 000000000..e89862548 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe-type-t.rst @@ -0,0 +1,91 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +************* +Frontend type +************* + +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: + + +.. c:type:: fe_type + +.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.5cm}| + +.. flat-table:: Frontend types + :header-rows: 1 + :stub-columns: 0 + :widths: 3 1 4 + + + - .. row 1 + + - fe_type + + - Description + + - :ref:`DTV_DELIVERY_SYSTEM ` equivalent + type + + - .. row 2 + + - .. _FE-QPSK: + + ``FE_QPSK`` + + - For DVB-S standard + + - ``SYS_DVBS`` + + - .. row 3 + + - .. _FE-QAM: + + ``FE_QAM`` + + - For DVB-C annex A standard + + - ``SYS_DVBC_ANNEX_A`` + + - .. row 4 + + - .. _FE-OFDM: + + ``FE_OFDM`` + + - For DVB-T standard + + - ``SYS_DVBT`` + + - .. row 5 + + - .. _FE-ATSC: + + ``FE_ATSC`` + + - For ATSC standard (terrestrial) or for DVB-C Annex B (cable) used + in US. + + - ``SYS_ATSC`` (terrestrial) or ``SYS_DVBC_ANNEX_B`` (cable) + + +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 +:ref:`FE_GET_PROPERTY/FE_GET_SET_PROPERTY ` +ioctl's, using the :ref:`DTV_DELIVERY_SYSTEM ` +parameter. + +In the old days, struct :c:type:`dvb_frontend_info` +used to contain ``fe_type_t`` 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 +:ref:`DTV_ENUM_DELSYS ` instead. + +On devices that support multiple delivery systems, struct +:c:type:`dvb_frontend_info`::``fe_type_t`` is +filled with the currently standard, as selected by the last call to +:ref:`FE_SET_PROPERTY ` using the +:ref:`DTV_DELIVERY_SYSTEM ` property. diff --git a/Documentation/userspace-api/media/dvb/fe_property_parameters.rst b/Documentation/userspace-api/media/dvb/fe_property_parameters.rst new file mode 100644 index 000000000..ce962d4a0 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/fe_property_parameters.rst @@ -0,0 +1,1013 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. _fe_property_parameters: + +****************************** +Digital TV property parameters +****************************** + +There are several different Digital TV parameters that can be used by +:ref:`FE_SET_PROPERTY and FE_GET_PROPERTY ioctls`. +This section describes each of them. Please notice, however, that only +a subset of them are needed to setup a frontend. + + +.. _DTV-UNDEFINED: + +DTV_UNDEFINED +============= + +Used internally. A GET/SET operation for it won't change or return +anything. + + +.. _DTV-TUNE: + +DTV_TUNE +======== + +Interpret the cache of data, build either a traditional frontend +tunerequest so we can pass validation in the ``FE_SET_FRONTEND`` ioctl. + + +.. _DTV-CLEAR: + +DTV_CLEAR +========= + +Reset a cache of data specific to the frontend here. This does not +effect hardware. + + +.. _DTV-FREQUENCY: + +DTV_FREQUENCY +============= + +Frequency of the digital TV transponder/channel. + +.. note:: + + #. For satellite delivery systems, the frequency is in kHz. + + #. For cable and terrestrial delivery systems, the frequency is in + Hz. + + #. On most delivery systems, the frequency is the center frequency + of the transponder/channel. The exception is for ISDB-T, where + the main carrier has a 1/7 offset from the center. + + #. For ISDB-T, the channels are usually transmitted with an offset of + about 143kHz. E.g. a valid frequency could be 474,143 kHz. The + stepping is bound to the bandwidth of the channel which is + typically 6MHz. + + #. In ISDB-Tsb, the channel consists of only one or three segments the + frequency step is 429kHz, 3*429 respectively. + + +.. _DTV-MODULATION: + +DTV_MODULATION +============== + +Specifies the frontend modulation type for delivery systems that +support multiple modulations. + +The modulation can be one of the types defined by enum :c:type:`fe_modulation`. + +Most of the digital TV standards offer more than one possible +modulation type. + +The table below presents a summary of the types of modulation types +supported by each delivery system, as currently defined by specs. + +======================= ======================================================= +Standard Modulation types +======================= ======================================================= +ATSC (version 1) 8-VSB and 16-VSB. +DMTB 4-QAM, 16-QAM, 32-QAM, 64-QAM and 4-QAM-NR. +DVB-C Annex A/C 16-QAM, 32-QAM, 64-QAM and 256-QAM. +DVB-C Annex B 64-QAM. +DVB-C2 QPSK, 16-QAM, 64-QAM, 256-QAM, 1024-QAM and 4096-QAM. +DVB-T QPSK, 16-QAM and 64-QAM. +DVB-T2 QPSK, 16-QAM, 64-QAM and 256-QAM. +DVB-S No need to set. It supports only QPSK. +DVB-S2 QPSK, 8-PSK, 16-APSK and 32-APSK. +DVB-S2X 8-APSK-L, 16-APSK-L, 32-APSK-L, 64-APSK and 64-APSK-L. +ISDB-T QPSK, DQPSK, 16-QAM and 64-QAM. +ISDB-S 8-PSK, QPSK and BPSK. +======================= ======================================================= + +.. note:: + + As DVB-S2X specifies extensions to the DVB-S2 standard, the same + delivery system enum value is used (SYS_DVBS2). + + Please notice that some of the above modulation types may not be + defined currently at the Kernel. The reason is simple: no driver + needed such definition yet. + + +.. _DTV-BANDWIDTH-HZ: + +DTV_BANDWIDTH_HZ +================ + +Bandwidth for the channel, in HZ. + +Should be set only for terrestrial delivery systems. + +Possible values: ``1712000``, ``5000000``, ``6000000``, ``7000000``, +``8000000``, ``10000000``. + +======================= ======================================================= +Terrestrial Standard Possible values for bandwidth +======================= ======================================================= +ATSC (version 1) No need to set. It is always 6MHz. +DMTB No need to set. It is always 8MHz. +DVB-T 6MHz, 7MHz and 8MHz. +DVB-T2 1.172 MHz, 5MHz, 6MHz, 7MHz, 8MHz and 10MHz +ISDB-T 5MHz, 6MHz, 7MHz and 8MHz, although most places + use 6MHz. +======================= ======================================================= + + +.. note:: + + + #. For ISDB-Tsb, the bandwidth can vary depending on the number of + connected segments. + + It can be easily derived from other parameters + (DTV_ISDBT_SB_SEGMENT_IDX, DTV_ISDBT_SB_SEGMENT_COUNT). + + #. On Satellite and Cable delivery systems, the bandwidth depends on + the symbol rate. The kernel will silently ignore any :ref:`DTV-BANDWIDTH-HZ` + setting and overwrites it with bandwidth estimation. + + Such bandwidth estimation takes into account the symbol rate set with + :ref:`DTV-SYMBOL-RATE`, and the rolloff factor, with is fixed for + DVB-C and DVB-S. + + For DVB-S2, the rolloff should also be set via :ref:`DTV-ROLLOFF`. + + +.. _DTV-INVERSION: + +DTV_INVERSION +============= + +Specifies if the frontend should do spectral inversion or not. + +The acceptable values are defined by :c:type:`fe_spectral_inversion`. + + +.. _DTV-DISEQC-MASTER: + +DTV_DISEQC_MASTER +================= + +Currently not implemented. + + +.. _DTV-SYMBOL-RATE: + +DTV_SYMBOL_RATE +=============== + +Used on cable and satellite delivery systems. + +Digital TV symbol rate, in bauds (symbols/second). + + +.. _DTV-INNER-FEC: + +DTV_INNER_FEC +============= + +Used on cable and satellite delivery systems. + +The acceptable values are defined by :c:type:`fe_code_rate`. + + +.. _DTV-VOLTAGE: + +DTV_VOLTAGE +=========== + +Used on satellite delivery systems. + +The voltage is usually used with non-DiSEqC capable LNBs to switch the +polarization (horizontal/vertical). When using DiSEqC equipment this +voltage has to be switched consistently to the DiSEqC commands as +described in the DiSEqC spec. + +The acceptable values are defined by :c:type:`fe_sec_voltage`. + + +.. _DTV-TONE: + +DTV_TONE +======== + +Currently not used. + + +.. _DTV-PILOT: + +DTV_PILOT +========= + +Used on DVB-S2. + +Sets DVB-S2 pilot. + +The acceptable values are defined by :c:type:`fe_pilot`. + + +.. _DTV-ROLLOFF: + +DTV_ROLLOFF +=========== + +Used on DVB-S2. + +Sets DVB-S2 rolloff. + +The acceptable values are defined by :c:type:`fe_rolloff`. + + +.. _DTV-DISEQC-SLAVE-REPLY: + +DTV_DISEQC_SLAVE_REPLY +====================== + +Currently not implemented. + + +.. _DTV-FE-CAPABILITY-COUNT: + +DTV_FE_CAPABILITY_COUNT +======================= + +Currently not implemented. + + +.. _DTV-FE-CAPABILITY: + +DTV_FE_CAPABILITY +================= + +Currently not implemented. + + +.. _DTV-DELIVERY-SYSTEM: + +DTV_DELIVERY_SYSTEM +=================== + +Specifies the type of the delivery system. + +The acceptable values are defined by :c:type:`fe_delivery_system`. + + +.. _DTV-ISDBT-PARTIAL-RECEPTION: + +DTV_ISDBT_PARTIAL_RECEPTION +=========================== + +Used only on ISDB. + +If ``DTV_ISDBT_SOUND_BROADCASTING`` is '0' this bit field represents +whether the channel is in partial reception mode or not. + +If '1' ``DTV_ISDBT_LAYERA_*`` values are assigned to the center segment +and ``DTV_ISDBT_LAYERA_SEGMENT_COUNT`` has to be '1'. + +If in addition ``DTV_ISDBT_SOUND_BROADCASTING`` is '1' +``DTV_ISDBT_PARTIAL_RECEPTION`` represents whether this ISDB-Tsb channel +is consisting of one segment and layer or three segments and two layers. + +Possible values: 0, 1, -1 (AUTO) + + +.. _DTV-ISDBT-SOUND-BROADCASTING: + +DTV_ISDBT_SOUND_BROADCASTING +============================ + +Used only on ISDB. + +This field represents whether the other DTV_ISDBT_*-parameters are +referring to an ISDB-T and an ISDB-Tsb channel. (See also +``DTV_ISDBT_PARTIAL_RECEPTION``). + +Possible values: 0, 1, -1 (AUTO) + + +.. _DTV-ISDBT-SB-SUBCHANNEL-ID: + +DTV_ISDBT_SB_SUBCHANNEL_ID +========================== + +Used only on ISDB. + +This field only applies if ``DTV_ISDBT_SOUND_BROADCASTING`` is '1'. + +(Note of the author: This might not be the correct description of the +``SUBCHANNEL-ID`` in all details, but it is my understanding of the +technical background needed to program a device) + +An ISDB-Tsb channel (1 or 3 segments) can be broadcasted alone or in a +set of connected ISDB-Tsb channels. In this set of channels every +channel can be received independently. The number of connected ISDB-Tsb +segment can vary, e.g. depending on the frequency spectrum bandwidth +available. + +Example: Assume 8 ISDB-Tsb connected segments are broadcasted. The +broadcaster has several possibilities to put those channels in the air: +Assuming a normal 13-segment ISDB-T spectrum he can align the 8 segments +from position 1-8 to 5-13 or anything in between. + +The underlying layer of segments are sub-channels: each segment is +consisting of several sub-channels with a predefined IDs. A sub-channel +is used to help the demodulator to synchronize on the channel. + +An ISDB-T channel is always centered over all sub-channels. As for the +example above, in ISDB-Tsb it is no longer as simple as that. + +``The DTV_ISDBT_SB_SUBCHANNEL_ID`` parameter is used to give the +sub-channel ID of the segment to be demodulated. + +Possible values: 0 .. 41, -1 (AUTO) + + +.. _DTV-ISDBT-SB-SEGMENT-IDX: + +DTV_ISDBT_SB_SEGMENT_IDX +======================== + +Used only on ISDB. + +This field only applies if ``DTV_ISDBT_SOUND_BROADCASTING`` is '1'. + +``DTV_ISDBT_SB_SEGMENT_IDX`` gives the index of the segment to be +demodulated for an ISDB-Tsb channel where several of them are +transmitted in the connected manner. + +Possible values: 0 .. ``DTV_ISDBT_SB_SEGMENT_COUNT`` - 1 + +Note: This value cannot be determined by an automatic channel search. + + +.. _DTV-ISDBT-SB-SEGMENT-COUNT: + +DTV_ISDBT_SB_SEGMENT_COUNT +========================== + +Used only on ISDB. + +This field only applies if ``DTV_ISDBT_SOUND_BROADCASTING`` is '1'. + +``DTV_ISDBT_SB_SEGMENT_COUNT`` gives the total count of connected +ISDB-Tsb channels. + +Possible values: 1 .. 13 + +Note: This value cannot be determined by an automatic channel search. + + +.. _isdb-hierq-layers: + +DTV-ISDBT-LAYER[A-C] parameters +=============================== + +Used only on ISDB. + +ISDB-T channels can be coded hierarchically. As opposed to DVB-T in +ISDB-T hierarchical layers can be decoded simultaneously. For that +reason a ISDB-T demodulator has 3 Viterbi and 3 Reed-Solomon decoders. + +ISDB-T has 3 hierarchical layers which each can use a part of the +available segments. The total number of segments over all layers has to +13 in ISDB-T. + +There are 3 parameter sets, for Layers A, B and C. + + +.. _DTV-ISDBT-LAYER-ENABLED: + +DTV_ISDBT_LAYER_ENABLED +----------------------- + +Used only on ISDB. + +Hierarchical reception in ISDB-T is achieved by enabling or disabling +layers in the decoding process. Setting all bits of +``DTV_ISDBT_LAYER_ENABLED`` to '1' forces all layers (if applicable) to +be demodulated. This is the default. + +If the channel is in the partial reception mode +(``DTV_ISDBT_PARTIAL_RECEPTION`` = 1) the central segment can be decoded +independently of the other 12 segments. In that mode layer A has to have +a ``SEGMENT_COUNT`` of 1. + +In ISDB-Tsb only layer A is used, it can be 1 or 3 in ISDB-Tsb according +to ``DTV_ISDBT_PARTIAL_RECEPTION``. ``SEGMENT_COUNT`` must be filled +accordingly. + +Only the values of the first 3 bits are used. Other bits will be silently ignored: + +``DTV_ISDBT_LAYER_ENABLED`` bit 0: layer A enabled + +``DTV_ISDBT_LAYER_ENABLED`` bit 1: layer B enabled + +``DTV_ISDBT_LAYER_ENABLED`` bit 2: layer C enabled + +``DTV_ISDBT_LAYER_ENABLED`` bits 3-31: unused + + +.. _DTV-ISDBT-LAYER-FEC: + +DTV_ISDBT_LAYER[A-C]_FEC +------------------------ + +Used only on ISDB. + +The Forward Error Correction mechanism used by a given ISDB Layer, as +defined by :c:type:`fe_code_rate`. + + +Possible values are: ``FEC_AUTO``, ``FEC_1_2``, ``FEC_2_3``, ``FEC_3_4``, +``FEC_5_6``, ``FEC_7_8`` + + +.. _DTV-ISDBT-LAYER-MODULATION: + +DTV_ISDBT_LAYER[A-C]_MODULATION +------------------------------- + +Used only on ISDB. + +The modulation used by a given ISDB Layer, as defined by +:c:type:`fe_modulation`. + +Possible values are: ``QAM_AUTO``, ``QPSK``, ``QAM_16``, ``QAM_64``, ``DQPSK`` + +.. note:: + + #. If layer C is ``DQPSK``, then layer B has to be ``DQPSK``. + + #. If layer B is ``DQPSK`` and ``DTV_ISDBT_PARTIAL_RECEPTION``\ = 0, + then layer has to be ``DQPSK``. + + +.. _DTV-ISDBT-LAYER-SEGMENT-COUNT: + +DTV_ISDBT_LAYER[A-C]_SEGMENT_COUNT +---------------------------------- + +Used only on ISDB. + +Possible values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, -1 (AUTO) + +Note: Truth table for ``DTV_ISDBT_SOUND_BROADCASTING`` and +``DTV_ISDBT_PARTIAL_RECEPTION`` and ``LAYER[A-C]_SEGMENT_COUNT`` + +.. _isdbt-layer_seg-cnt-table: + +.. flat-table:: Truth table for ISDB-T Sound Broadcasting + :header-rows: 1 + :stub-columns: 0 + + + - .. row 1 + + - Partial Reception + + - Sound Broadcasting + + - Layer A width + + - Layer B width + + - Layer C width + + - total width + + - .. row 2 + + - 0 + + - 0 + + - 1 .. 13 + + - 1 .. 13 + + - 1 .. 13 + + - 13 + + - .. row 3 + + - 1 + + - 0 + + - 1 + + - 1 .. 13 + + - 1 .. 13 + + - 13 + + - .. row 4 + + - 0 + + - 1 + + - 1 + + - 0 + + - 0 + + - 1 + + - .. row 5 + + - 1 + + - 1 + + - 1 + + - 2 + + - 0 + + - 13 + + + +.. _DTV-ISDBT-LAYER-TIME-INTERLEAVING: + +DTV_ISDBT_LAYER[A-C]_TIME_INTERLEAVING +-------------------------------------- + +Used only on ISDB. + +Valid values: 0, 1, 2, 4, -1 (AUTO) + +when DTV_ISDBT_SOUND_BROADCASTING is active, value 8 is also valid. + +Note: The real time interleaving length depends on the mode (fft-size). +The values here are referring to what can be found in the +TMCC-structure, as shown in the table below. + + +.. c:type:: isdbt_layer_interleaving_table + +.. flat-table:: ISDB-T time interleaving modes + :header-rows: 1 + :stub-columns: 0 + + + - .. row 1 + + - ``DTV_ISDBT_LAYER[A-C]_TIME_INTERLEAVING`` + + - Mode 1 (2K FFT) + + - Mode 2 (4K FFT) + + - Mode 3 (8K FFT) + + - .. row 2 + + - 0 + + - 0 + + - 0 + + - 0 + + - .. row 3 + + - 1 + + - 4 + + - 2 + + - 1 + + - .. row 4 + + - 2 + + - 8 + + - 4 + + - 2 + + - .. row 5 + + - 4 + + - 16 + + - 8 + + - 4 + + + +.. _DTV-ATSCMH-FIC-VER: + +DTV_ATSCMH_FIC_VER +------------------ + +Used only on ATSC-MH. + +Version number of the FIC (Fast Information Channel) signaling data. + +FIC is used for relaying information to allow rapid service acquisition +by the receiver. + +Possible values: 0, 1, 2, 3, ..., 30, 31 + + +.. _DTV-ATSCMH-PARADE-ID: + +DTV_ATSCMH_PARADE_ID +-------------------- + +Used only on ATSC-MH. + +Parade identification number + +A parade is a collection of up to eight MH groups, conveying one or two +ensembles. + +Possible values: 0, 1, 2, 3, ..., 126, 127 + + +.. _DTV-ATSCMH-NOG: + +DTV_ATSCMH_NOG +-------------- + +Used only on ATSC-MH. + +Number of MH groups per MH subframe for a designated parade. + +Possible values: 1, 2, 3, 4, 5, 6, 7, 8 + + +.. _DTV-ATSCMH-TNOG: + +DTV_ATSCMH_TNOG +--------------- + +Used only on ATSC-MH. + +Total number of MH groups including all MH groups belonging to all MH +parades in one MH subframe. + +Possible values: 0, 1, 2, 3, ..., 30, 31 + + +.. _DTV-ATSCMH-SGN: + +DTV_ATSCMH_SGN +-------------- + +Used only on ATSC-MH. + +Start group number. + +Possible values: 0, 1, 2, 3, ..., 14, 15 + + +.. _DTV-ATSCMH-PRC: + +DTV_ATSCMH_PRC +-------------- + +Used only on ATSC-MH. + +Parade repetition cycle. + +Possible values: 1, 2, 3, 4, 5, 6, 7, 8 + + +.. _DTV-ATSCMH-RS-FRAME-MODE: + +DTV_ATSCMH_RS_FRAME_MODE +------------------------ + +Used only on ATSC-MH. + +Reed Solomon (RS) frame mode. + +The acceptable values are defined by :c:type:`atscmh_rs_frame_mode`. + + +.. _DTV-ATSCMH-RS-FRAME-ENSEMBLE: + +DTV_ATSCMH_RS_FRAME_ENSEMBLE +---------------------------- + +Used only on ATSC-MH. + +Reed Solomon (RS) frame ensemble. + +The acceptable values are defined by :c:type:`atscmh_rs_frame_ensemble`. + + +.. _DTV-ATSCMH-RS-CODE-MODE-PRI: + +DTV_ATSCMH_RS_CODE_MODE_PRI +--------------------------- + +Used only on ATSC-MH. + +Reed Solomon (RS) code mode (primary). + +The acceptable values are defined by :c:type:`atscmh_rs_code_mode`. + + +.. _DTV-ATSCMH-RS-CODE-MODE-SEC: + +DTV_ATSCMH_RS_CODE_MODE_SEC +--------------------------- + +Used only on ATSC-MH. + +Reed Solomon (RS) code mode (secondary). + +The acceptable values are defined by :c:type:`atscmh_rs_code_mode`. + + +.. _DTV-ATSCMH-SCCC-BLOCK-MODE: + +DTV_ATSCMH_SCCC_BLOCK_MODE +-------------------------- + +Used only on ATSC-MH. + +Series Concatenated Convolutional Code Block Mode. + +The acceptable values are defined by :c:type:`atscmh_sccc_block_mode`. + + +.. _DTV-ATSCMH-SCCC-CODE-MODE-A: + +DTV_ATSCMH_SCCC_CODE_MODE_A +--------------------------- + +Used only on ATSC-MH. + +Series Concatenated Convolutional Code Rate. + +The acceptable values are defined by :c:type:`atscmh_sccc_code_mode`. + +.. _DTV-ATSCMH-SCCC-CODE-MODE-B: + +DTV_ATSCMH_SCCC_CODE_MODE_B +--------------------------- + +Used only on ATSC-MH. + +Series Concatenated Convolutional Code Rate. + +Possible values are the same as documented on enum +:c:type:`atscmh_sccc_code_mode`. + + +.. _DTV-ATSCMH-SCCC-CODE-MODE-C: + +DTV_ATSCMH_SCCC_CODE_MODE_C +--------------------------- + +Used only on ATSC-MH. + +Series Concatenated Convolutional Code Rate. + +Possible values are the same as documented on enum +:c:type:`atscmh_sccc_code_mode`. + + +.. _DTV-ATSCMH-SCCC-CODE-MODE-D: + +DTV_ATSCMH_SCCC_CODE_MODE_D +--------------------------- + +Used only on ATSC-MH. + +Series Concatenated Convolutional Code Rate. + +Possible values are the same as documented on enum +:c:type:`atscmh_sccc_code_mode`. + + +.. _DTV-API-VERSION: + +DTV_API_VERSION +=============== + +Returns the major/minor version of the Digital TV API + + +.. _DTV-CODE-RATE-HP: + +DTV_CODE_RATE_HP +================ + +Used on terrestrial transmissions. + +The acceptable values are defined by :c:type:`fe_transmit_mode`. + + +.. _DTV-CODE-RATE-LP: + +DTV_CODE_RATE_LP +================ + +Used on terrestrial transmissions. + +The acceptable values are defined by :c:type:`fe_transmit_mode`. + + +.. _DTV-GUARD-INTERVAL: + +DTV_GUARD_INTERVAL +================== + +The acceptable values are defined by :c:type:`fe_guard_interval`. + +.. note:: + + #. If ``DTV_GUARD_INTERVAL`` is set the ``GUARD_INTERVAL_AUTO`` the + hardware will try to find the correct guard interval (if capable) and + will use TMCC to fill in the missing parameters. + #. Interval ``GUARD_INTERVAL_1_64`` is used only for DVB-C2. + #. Interval ``GUARD_INTERVAL_1_128`` is used for both DVB-C2 and DVB_T2. + #. Intervals ``GUARD_INTERVAL_19_128`` and ``GUARD_INTERVAL_19_256`` are + used only for DVB-T2. + #. Intervals ``GUARD_INTERVAL_PN420``, ``GUARD_INTERVAL_PN595`` and + ``GUARD_INTERVAL_PN945`` are used only for DMTB at the present. + On such standard, only those intervals and ``GUARD_INTERVAL_AUTO`` + are valid. + +.. _DTV-TRANSMISSION-MODE: + +DTV_TRANSMISSION_MODE +===================== + + +Used only on OFTM-based standards, e. g. DVB-T/T2, ISDB-T, DTMB. + +Specifies the FFT size (with corresponds to the approximate number of +carriers) used by the standard. + +The acceptable values are defined by :c:type:`fe_transmit_mode`. + +.. note:: + + #. ISDB-T supports three carrier/symbol-size: 8K, 4K, 2K. It is called + **mode** on such standard, and are numbered from 1 to 3: + + ==== ======== ======================== + Mode FFT size Transmission mode + ==== ======== ======================== + 1 2K ``TRANSMISSION_MODE_2K`` + 2 4K ``TRANSMISSION_MODE_4K`` + 3 8K ``TRANSMISSION_MODE_8K`` + ==== ======== ======================== + + #. If ``DTV_TRANSMISSION_MODE`` is set the ``TRANSMISSION_MODE_AUTO`` + the hardware will try to find the correct FFT-size (if capable) and + will use TMCC to fill in the missing parameters. + + #. DVB-T specifies 2K and 8K as valid sizes. + + #. DVB-T2 specifies 1K, 2K, 4K, 8K, 16K and 32K. + + #. DTMB specifies C1 and C3780. + + +.. _DTV-HIERARCHY: + +DTV_HIERARCHY +============= + +Used only on DVB-T and DVB-T2. + +Frontend hierarchy. + +The acceptable values are defined by :c:type:`fe_hierarchy`. + + +.. _DTV-STREAM-ID: + +DTV_STREAM_ID +============= + +Used on DVB-C2, DVB-S2, DVB-T2 and ISDB-S. + +DVB-C2, DVB-S2, DVB-T2 and ISDB-S support the transmission of several +streams on a single transport stream. This property enables the digital +TV driver to handle substream filtering, when supported by the hardware. +By default, substream filtering is disabled. + +For DVB-C2, DVB-S2 and DVB-T2, the valid substream id range is from 0 to +255. + +For ISDB, the valid substream id range is from 1 to 65535. + +To disable it, you should use the special macro NO_STREAM_ID_FILTER. + +Note: any value outside the id range also disables filtering. + + +.. _DTV-DVBT2-PLP-ID-LEGACY: + +DTV_DVBT2_PLP_ID_LEGACY +======================= + +Obsolete, replaced with DTV_STREAM_ID. + + +.. _DTV-ENUM-DELSYS: + +DTV_ENUM_DELSYS +=============== + +A Multi standard frontend needs to advertise the delivery systems +provided. Applications need to enumerate the provided delivery systems, +before using any other operation with the frontend. Prior to its +introduction, FE_GET_INFO was used to determine a frontend type. A +frontend which provides more than a single delivery system, +FE_GET_INFO doesn't help much. Applications which intends to use a +multistandard frontend must enumerate the delivery systems associated +with it, rather than trying to use FE_GET_INFO. In the case of a +legacy frontend, the result is just the same as with FE_GET_INFO, but +in a more structured format. + +The acceptable values are defined by :c:type:`fe_delivery_system`. + + +.. _DTV-INTERLEAVING: + +DTV_INTERLEAVING +================ + +Time interleaving to be used. + +The acceptable values are defined by :c:type:`fe_interleaving`. + + +.. _DTV-LNA: + +DTV_LNA +======= + +Low-noise amplifier. + +Hardware might offer controllable LNA which can be set manually using +that parameter. Usually LNA could be found only from terrestrial devices +if at all. + +Possible values: 0, 1, LNA_AUTO + +0, LNA off + +1, LNA on + +use the special macro LNA_AUTO to set LNA auto + + +.. _DTV-SCRAMBLING-SEQUENCE-INDEX: + +DTV_SCRAMBLING_SEQUENCE_INDEX +============================= + +Used on DVB-S2. + +This 18 bit field, when present, carries the index of the DVB-S2 physical +layer scrambling sequence as defined in clause 5.5.4 of EN 302 307. +There is no explicit signalling method to convey scrambling sequence index +to the receiver. If S2 satellite delivery system descriptor is available +it can be used to read the scrambling sequence index (EN 300 468 table 41). + +By default, gold scrambling sequence index 0 is used. + +The valid scrambling sequence index range is from 0 to 262142. diff --git a/Documentation/userspace-api/media/dvb/frontend-header.rst b/Documentation/userspace-api/media/dvb/frontend-header.rst new file mode 100644 index 000000000..77f403361 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/frontend-header.rst @@ -0,0 +1,6 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +Frontend uAPI data types +======================== + +.. kernel-doc:: include/uapi/linux/dvb/frontend.h diff --git a/Documentation/userspace-api/media/dvb/frontend-property-cable-systems.rst b/Documentation/userspace-api/media/dvb/frontend-property-cable-systems.rst new file mode 100644 index 000000000..92ef98964 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/frontend-property-cable-systems.rst @@ -0,0 +1,75 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. _frontend-property-cable-systems: + +***************************************** +Properties used on cable delivery systems +***************************************** + + +.. _dvbc-params: + +DVB-C delivery system +===================== + +The DVB-C Annex-A is the widely used cable standard. Transmission uses +QAM modulation. + +The DVB-C Annex-C is optimized for 6MHz, and is used in Japan. It +supports a subset of the Annex A modulation types, and a roll-off of +0.13, instead of 0.15 + +The following parameters are valid for DVB-C Annex A/C: + +- :ref:`DTV_API_VERSION ` + +- :ref:`DTV_DELIVERY_SYSTEM ` + +- :ref:`DTV_TUNE ` + +- :ref:`DTV_CLEAR ` + +- :ref:`DTV_FREQUENCY ` + +- :ref:`DTV_MODULATION ` + +- :ref:`DTV_INVERSION ` + +- :ref:`DTV_SYMBOL_RATE ` + +- :ref:`DTV_INNER_FEC ` + +- :ref:`DTV_LNA ` + +In addition, the :ref:`DTV QoS statistics ` +are also valid. + + +.. _dvbc-annex-b-params: + +DVB-C Annex B delivery system +============================= + +The DVB-C Annex-B is only used on a few Countries like the United +States. + +The following parameters are valid for DVB-C Annex B: + +- :ref:`DTV_API_VERSION ` + +- :ref:`DTV_DELIVERY_SYSTEM ` + +- :ref:`DTV_TUNE ` + +- :ref:`DTV_CLEAR ` + +- :ref:`DTV_FREQUENCY ` + +- :ref:`DTV_MODULATION ` + +- :ref:`DTV_INVERSION ` + +- :ref:`DTV_LNA ` + +In addition, the :ref:`DTV QoS statistics ` +are also valid. diff --git a/Documentation/userspace-api/media/dvb/frontend-property-satellite-systems.rst b/Documentation/userspace-api/media/dvb/frontend-property-satellite-systems.rst new file mode 100644 index 000000000..13b344b28 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/frontend-property-satellite-systems.rst @@ -0,0 +1,105 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. _frontend-property-satellite-systems: + +********************************************* +Properties used on satellite delivery systems +********************************************* + + +.. _dvbs-params: + +DVB-S delivery system +===================== + +The following parameters are valid for DVB-S: + +- :ref:`DTV_API_VERSION ` + +- :ref:`DTV_DELIVERY_SYSTEM ` + +- :ref:`DTV_TUNE ` + +- :ref:`DTV_CLEAR ` + +- :ref:`DTV_FREQUENCY ` + +- :ref:`DTV_INVERSION ` + +- :ref:`DTV_SYMBOL_RATE ` + +- :ref:`DTV_INNER_FEC ` + +- :ref:`DTV_VOLTAGE ` + +- :ref:`DTV_TONE ` + +In addition, the :ref:`DTV QoS statistics ` +are also valid. + +Future implementations might add those two missing parameters: + +- :ref:`DTV_DISEQC_MASTER ` + +- :ref:`DTV_DISEQC_SLAVE_REPLY ` + + +.. _dvbs2-params: + +DVB-S2 delivery system +====================== + +In addition to all parameters valid for DVB-S, DVB-S2 supports the +following parameters: + +- :ref:`DTV_MODULATION ` + +- :ref:`DTV_PILOT ` + +- :ref:`DTV_ROLLOFF ` + +- :ref:`DTV_STREAM_ID ` + +- :ref:`DTV_SCRAMBLING_SEQUENCE_INDEX ` + +In addition, the :ref:`DTV QoS statistics ` +are also valid. + + +.. _turbo-params: + +Turbo code delivery system +========================== + +In addition to all parameters valid for DVB-S, turbo code supports the +following parameters: + +- :ref:`DTV_MODULATION ` + + +.. _isdbs-params: + +ISDB-S delivery system +====================== + +The following parameters are valid for ISDB-S: + +- :ref:`DTV_API_VERSION ` + +- :ref:`DTV_DELIVERY_SYSTEM ` + +- :ref:`DTV_TUNE ` + +- :ref:`DTV_CLEAR ` + +- :ref:`DTV_FREQUENCY ` + +- :ref:`DTV_INVERSION ` + +- :ref:`DTV_SYMBOL_RATE ` + +- :ref:`DTV_INNER_FEC ` + +- :ref:`DTV_VOLTAGE ` + +- :ref:`DTV_STREAM_ID ` diff --git a/Documentation/userspace-api/media/dvb/frontend-property-terrestrial-systems.rst b/Documentation/userspace-api/media/dvb/frontend-property-terrestrial-systems.rst new file mode 100644 index 000000000..8aad9ea81 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/frontend-property-terrestrial-systems.rst @@ -0,0 +1,294 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. _frontend-property-terrestrial-systems: + +*********************************************** +Properties used on terrestrial delivery systems +*********************************************** + + +.. _dvbt-params: + +DVB-T delivery system +===================== + +The following parameters are valid for DVB-T: + +- :ref:`DTV_API_VERSION ` + +- :ref:`DTV_DELIVERY_SYSTEM ` + +- :ref:`DTV_TUNE ` + +- :ref:`DTV_CLEAR ` + +- :ref:`DTV_FREQUENCY ` + +- :ref:`DTV_MODULATION ` + +- :ref:`DTV_BANDWIDTH_HZ ` + +- :ref:`DTV_INVERSION ` + +- :ref:`DTV_CODE_RATE_HP ` + +- :ref:`DTV_CODE_RATE_LP ` + +- :ref:`DTV_GUARD_INTERVAL ` + +- :ref:`DTV_TRANSMISSION_MODE ` + +- :ref:`DTV_HIERARCHY ` + +- :ref:`DTV_LNA ` + +In addition, the :ref:`DTV QoS statistics ` +are also valid. + + +.. _dvbt2-params: + +DVB-T2 delivery system +====================== + +DVB-T2 support is currently in the early stages of development, so +expect that this section may grow and become more detailed with time. + +The following parameters are valid for DVB-T2: + +- :ref:`DTV_API_VERSION ` + +- :ref:`DTV_DELIVERY_SYSTEM ` + +- :ref:`DTV_TUNE ` + +- :ref:`DTV_CLEAR ` + +- :ref:`DTV_FREQUENCY ` + +- :ref:`DTV_MODULATION ` + +- :ref:`DTV_BANDWIDTH_HZ ` + +- :ref:`DTV_INVERSION ` + +- :ref:`DTV_CODE_RATE_HP ` + +- :ref:`DTV_CODE_RATE_LP ` + +- :ref:`DTV_GUARD_INTERVAL ` + +- :ref:`DTV_TRANSMISSION_MODE ` + +- :ref:`DTV_HIERARCHY ` + +- :ref:`DTV_STREAM_ID ` + +- :ref:`DTV_LNA ` + +In addition, the :ref:`DTV QoS statistics ` +are also valid. + + +.. _isdbt: + +ISDB-T delivery system +====================== + +This ISDB-T/ISDB-Tsb API extension should reflect all information needed +to tune any ISDB-T/ISDB-Tsb hardware. Of course it is possible that some +very sophisticated devices won't need certain parameters to tune. + +The information given here should help application writers to know how +to handle ISDB-T and ISDB-Tsb hardware using the Linux Digital TV API. + +The details given here about ISDB-T and ISDB-Tsb are just enough to +basically show the dependencies between the needed parameter values, but +surely some information is left out. For more detailed information see +the following documents: + +ARIB STD-B31 - "Transmission System for Digital Terrestrial Television +Broadcasting" and + +ARIB TR-B14 - "Operational Guidelines for Digital Terrestrial Television +Broadcasting". + +In order to understand the ISDB specific parameters, one has to have +some knowledge the channel structure in ISDB-T and ISDB-Tsb. I.e. it has +to be known to the reader that an ISDB-T channel consists of 13 +segments, that it can have up to 3 layer sharing those segments, and +things like that. + +The following parameters are valid for ISDB-T: + +- :ref:`DTV_API_VERSION ` + +- :ref:`DTV_DELIVERY_SYSTEM ` + +- :ref:`DTV_TUNE ` + +- :ref:`DTV_CLEAR ` + +- :ref:`DTV_FREQUENCY ` + +- :ref:`DTV_BANDWIDTH_HZ ` + +- :ref:`DTV_INVERSION ` + +- :ref:`DTV_GUARD_INTERVAL ` + +- :ref:`DTV_TRANSMISSION_MODE ` + +- :ref:`DTV_ISDBT_LAYER_ENABLED ` + +- :ref:`DTV_ISDBT_PARTIAL_RECEPTION ` + +- :ref:`DTV_ISDBT_SOUND_BROADCASTING ` + +- :ref:`DTV_ISDBT_SB_SUBCHANNEL_ID ` + +- :ref:`DTV_ISDBT_SB_SEGMENT_IDX ` + +- :ref:`DTV_ISDBT_SB_SEGMENT_COUNT ` + +- :ref:`DTV_ISDBT_LAYERA_FEC ` + +- :ref:`DTV_ISDBT_LAYERA_MODULATION ` + +- :ref:`DTV_ISDBT_LAYERA_SEGMENT_COUNT ` + +- :ref:`DTV_ISDBT_LAYERA_TIME_INTERLEAVING ` + +- :ref:`DTV_ISDBT_LAYERB_FEC ` + +- :ref:`DTV_ISDBT_LAYERB_MODULATION ` + +- :ref:`DTV_ISDBT_LAYERB_SEGMENT_COUNT ` + +- :ref:`DTV_ISDBT_LAYERB_TIME_INTERLEAVING ` + +- :ref:`DTV_ISDBT_LAYERC_FEC ` + +- :ref:`DTV_ISDBT_LAYERC_MODULATION ` + +- :ref:`DTV_ISDBT_LAYERC_SEGMENT_COUNT ` + +- :ref:`DTV_ISDBT_LAYERC_TIME_INTERLEAVING ` + +In addition, the :ref:`DTV QoS statistics ` +are also valid. + + +.. _atsc-params: + +ATSC delivery system +==================== + +The following parameters are valid for ATSC: + +- :ref:`DTV_API_VERSION ` + +- :ref:`DTV_DELIVERY_SYSTEM ` + +- :ref:`DTV_TUNE ` + +- :ref:`DTV_CLEAR ` + +- :ref:`DTV_FREQUENCY ` + +- :ref:`DTV_MODULATION ` + +- :ref:`DTV_BANDWIDTH_HZ ` + +In addition, the :ref:`DTV QoS statistics ` +are also valid. + + +.. _atscmh-params: + +ATSC-MH delivery system +======================= + +The following parameters are valid for ATSC-MH: + +- :ref:`DTV_API_VERSION ` + +- :ref:`DTV_DELIVERY_SYSTEM ` + +- :ref:`DTV_TUNE ` + +- :ref:`DTV_CLEAR ` + +- :ref:`DTV_FREQUENCY ` + +- :ref:`DTV_BANDWIDTH_HZ ` + +- :ref:`DTV_ATSCMH_FIC_VER ` + +- :ref:`DTV_ATSCMH_PARADE_ID ` + +- :ref:`DTV_ATSCMH_NOG ` + +- :ref:`DTV_ATSCMH_TNOG ` + +- :ref:`DTV_ATSCMH_SGN ` + +- :ref:`DTV_ATSCMH_PRC ` + +- :ref:`DTV_ATSCMH_RS_FRAME_MODE ` + +- :ref:`DTV_ATSCMH_RS_FRAME_ENSEMBLE ` + +- :ref:`DTV_ATSCMH_RS_CODE_MODE_PRI ` + +- :ref:`DTV_ATSCMH_RS_CODE_MODE_SEC ` + +- :ref:`DTV_ATSCMH_SCCC_BLOCK_MODE ` + +- :ref:`DTV_ATSCMH_SCCC_CODE_MODE_A ` + +- :ref:`DTV_ATSCMH_SCCC_CODE_MODE_B ` + +- :ref:`DTV_ATSCMH_SCCC_CODE_MODE_C ` + +- :ref:`DTV_ATSCMH_SCCC_CODE_MODE_D ` + +In addition, the :ref:`DTV QoS statistics ` +are also valid. + + +.. _dtmb-params: + +DTMB delivery system +==================== + +The following parameters are valid for DTMB: + +- :ref:`DTV_API_VERSION ` + +- :ref:`DTV_DELIVERY_SYSTEM ` + +- :ref:`DTV_TUNE ` + +- :ref:`DTV_CLEAR ` + +- :ref:`DTV_FREQUENCY ` + +- :ref:`DTV_MODULATION ` + +- :ref:`DTV_BANDWIDTH_HZ ` + +- :ref:`DTV_INVERSION ` + +- :ref:`DTV_INNER_FEC ` + +- :ref:`DTV_GUARD_INTERVAL ` + +- :ref:`DTV_TRANSMISSION_MODE ` + +- :ref:`DTV_INTERLEAVING ` + +- :ref:`DTV_LNA ` + +In addition, the :ref:`DTV QoS statistics ` +are also valid. diff --git a/Documentation/userspace-api/media/dvb/frontend-stat-properties.rst b/Documentation/userspace-api/media/dvb/frontend-stat-properties.rst new file mode 100644 index 000000000..223c1c56c --- /dev/null +++ b/Documentation/userspace-api/media/dvb/frontend-stat-properties.rst @@ -0,0 +1,245 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. _frontend-stat-properties: + +****************************** +Frontend statistics indicators +****************************** + +The values are returned via ``dtv_property.stat``. If the property is +supported, ``dtv_property.stat.len`` is bigger than zero. + +For most delivery systems, ``dtv_property.stat.len`` will be 1 if the +stats is supported, and the properties will return a single value for +each parameter. + +It should be noted, however, that new OFDM delivery systems like ISDB +can use different modulation types for each group of carriers. On such +standards, up to 3 groups of statistics can be provided, and +``dtv_property.stat.len`` is updated to reflect the "global" metrics, +plus one metric per each carrier group (called "layer" on ISDB). + +So, in order to be consistent with other delivery systems, the first +value at :c:type:`dtv_property.stat.dtv_stats ` array refers +to the global metric. The other elements of the array represent each +layer, starting from layer A(index 1), layer B (index 2) and so on. + +The number of filled elements are stored at ``dtv_property.stat.len``. + +Each element of the ``dtv_property.stat.dtv_stats`` array consists on +two elements: + +- ``svalue`` or ``uvalue``, where ``svalue`` is for signed values of + the measure (dB measures) and ``uvalue`` is for unsigned values + (counters, relative scale) + +- ``scale`` - Scale for the value. It can be: + + - ``FE_SCALE_NOT_AVAILABLE`` - The parameter is supported by the + frontend, but it was not possible to collect it (could be a + transitory or permanent condition) + + - ``FE_SCALE_DECIBEL`` - parameter is a signed value, measured in + 1/1000 dB + + - ``FE_SCALE_RELATIVE`` - parameter is a unsigned value, where 0 + means 0% and 65535 means 100%. + + - ``FE_SCALE_COUNTER`` - parameter is a unsigned value that counts + the occurrence of an event, like bit error, block error, or lapsed + time. + + +.. _DTV-STAT-SIGNAL-STRENGTH: + +DTV_STAT_SIGNAL_STRENGTH +======================== + +Indicates the signal strength level at the analog part of the tuner or +of the demod. + +Possible scales for this metric are: + +- ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the + measurement was not complete yet. + +- ``FE_SCALE_DECIBEL`` - signal strength is in 0.001 dBm units, power + measured in miliwatts. This value is generally negative. + +- ``FE_SCALE_RELATIVE`` - The frontend provides a 0% to 100% + measurement for power (actually, 0 to 65535). + + +.. _DTV-STAT-CNR: + +DTV_STAT_CNR +============ + +Indicates the Signal to Noise ratio for the main carrier. + +Possible scales for this metric are: + +- ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the + measurement was not complete yet. + +- ``FE_SCALE_DECIBEL`` - Signal/Noise ratio is in 0.001 dB units. + +- ``FE_SCALE_RELATIVE`` - The frontend provides a 0% to 100% + measurement for Signal/Noise (actually, 0 to 65535). + + +.. _DTV-STAT-PRE-ERROR-BIT-COUNT: + +DTV_STAT_PRE_ERROR_BIT_COUNT +============================ + +Measures the number of bit errors before the forward error correction +(FEC) on the inner coding block (before Viterbi, LDPC or other inner +code). + +This measure is taken during the same interval as +``DTV_STAT_PRE_TOTAL_BIT_COUNT``. + +In order to get the BER (Bit Error Rate) measurement, it should be +divided by +:ref:`DTV_STAT_PRE_TOTAL_BIT_COUNT `. + +This measurement is monotonically increased, as the frontend gets more +bit count measurements. The frontend may reset it when a +channel/transponder is tuned. + +Possible scales for this metric are: + +- ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the + measurement was not complete yet. + +- ``FE_SCALE_COUNTER`` - Number of error bits counted before the inner + coding. + + +.. _DTV-STAT-PRE-TOTAL-BIT-COUNT: + +DTV_STAT_PRE_TOTAL_BIT_COUNT +============================ + +Measures the amount of bits received before the inner code block, during +the same period as +:ref:`DTV_STAT_PRE_ERROR_BIT_COUNT ` +measurement was taken. + +It should be noted that this measurement can be smaller than the total +amount of bits on the transport stream, as the frontend may need to +manually restart the measurement, losing some data between each +measurement interval. + +This measurement is monotonically increased, as the frontend gets more +bit count measurements. The frontend may reset it when a +channel/transponder is tuned. + +Possible scales for this metric are: + +- ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the + measurement was not complete yet. + +- ``FE_SCALE_COUNTER`` - Number of bits counted while measuring + :ref:`DTV_STAT_PRE_ERROR_BIT_COUNT `. + + +.. _DTV-STAT-POST-ERROR-BIT-COUNT: + +DTV_STAT_POST_ERROR_BIT_COUNT +============================= + +Measures the number of bit errors after the forward error correction +(FEC) done by inner code block (after Viterbi, LDPC or other inner +code). + +This measure is taken during the same interval as +``DTV_STAT_POST_TOTAL_BIT_COUNT``. + +In order to get the BER (Bit Error Rate) measurement, it should be +divided by +:ref:`DTV_STAT_POST_TOTAL_BIT_COUNT `. + +This measurement is monotonically increased, as the frontend gets more +bit count measurements. The frontend may reset it when a +channel/transponder is tuned. + +Possible scales for this metric are: + +- ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the + measurement was not complete yet. + +- ``FE_SCALE_COUNTER`` - Number of error bits counted after the inner + coding. + + +.. _DTV-STAT-POST-TOTAL-BIT-COUNT: + +DTV_STAT_POST_TOTAL_BIT_COUNT +============================= + +Measures the amount of bits received after the inner coding, during the +same period as +:ref:`DTV_STAT_POST_ERROR_BIT_COUNT ` +measurement was taken. + +It should be noted that this measurement can be smaller than the total +amount of bits on the transport stream, as the frontend may need to +manually restart the measurement, losing some data between each +measurement interval. + +This measurement is monotonically increased, as the frontend gets more +bit count measurements. The frontend may reset it when a +channel/transponder is tuned. + +Possible scales for this metric are: + +- ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the + measurement was not complete yet. + +- ``FE_SCALE_COUNTER`` - Number of bits counted while measuring + :ref:`DTV_STAT_POST_ERROR_BIT_COUNT `. + + +.. _DTV-STAT-ERROR-BLOCK-COUNT: + +DTV_STAT_ERROR_BLOCK_COUNT +========================== + +Measures the number of block errors after the outer forward error +correction coding (after Reed-Solomon or other outer code). + +This measurement is monotonically increased, as the frontend gets more +bit count measurements. The frontend may reset it when a +channel/transponder is tuned. + +Possible scales for this metric are: + +- ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the + measurement was not complete yet. + +- ``FE_SCALE_COUNTER`` - Number of error blocks counted after the outer + coding. + + +.. _DTV-STAT-TOTAL-BLOCK-COUNT: + +DTV-STAT_TOTAL_BLOCK_COUNT +========================== + +Measures the total number of blocks received during the same period as +:ref:`DTV_STAT_ERROR_BLOCK_COUNT ` +measurement was taken. + +It can be used to calculate the PER indicator, by dividing +:ref:`DTV_STAT_ERROR_BLOCK_COUNT ` by +:ref:`DTV-STAT-TOTAL-BLOCK-COUNT`. + +Possible scales for this metric are: + +- ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the + measurement was not complete yet. + +- ``FE_SCALE_COUNTER`` - Number of blocks counted while measuring + :ref:`DTV_STAT_ERROR_BLOCK_COUNT `. diff --git a/Documentation/userspace-api/media/dvb/frontend.h.rst.exceptions b/Documentation/userspace-api/media/dvb/frontend.h.rst.exceptions new file mode 100644 index 000000000..cecd4087d --- /dev/null +++ b/Documentation/userspace-api/media/dvb/frontend.h.rst.exceptions @@ -0,0 +1,247 @@ +# SPDX-License-Identifier: GPL-2.0 + +# Ignore header name +ignore define _DVBFRONTEND_H_ + +# Group layer A-C symbols together +replace define DTV_ISDBT_LAYERA_FEC dtv-isdbt-layer-fec +replace define DTV_ISDBT_LAYERB_FEC dtv-isdbt-layer-fec +replace define DTV_ISDBT_LAYERC_FEC dtv-isdbt-layer-fec +replace define DTV_ISDBT_LAYERA_MODULATION dtv-isdbt-layer-modulation +replace define DTV_ISDBT_LAYERB_MODULATION dtv-isdbt-layer-modulation +replace define DTV_ISDBT_LAYERC_MODULATION dtv-isdbt-layer-modulation +replace define DTV_ISDBT_LAYERA_SEGMENT_COUNT dtv-isdbt-layer-segment-count +replace define DTV_ISDBT_LAYERB_SEGMENT_COUNT dtv-isdbt-layer-segment-count +replace define DTV_ISDBT_LAYERC_SEGMENT_COUNT dtv-isdbt-layer-segment-count +replace define DTV_ISDBT_LAYERA_TIME_INTERLEAVING dtv-isdbt-layer-time-interleaving +replace define DTV_ISDBT_LAYERB_TIME_INTERLEAVING dtv-isdbt-layer-time-interleaving +replace define DTV_ISDBT_LAYERC_TIME_INTERLEAVING dtv-isdbt-layer-time-interleaving + +# Ignore legacy defines +ignore define DTV_ISDBS_TS_ID_LEGACY +ignore define SYS_DVBC_ANNEX_AC +ignore define SYS_DMBTH + +# Ignore limits +ignore define DTV_MAX_COMMAND +ignore define MAX_DTV_STATS +ignore define DTV_IOCTL_MAX_MSGS + +# the same reference is used for both get and set ioctls +replace ioctl FE_SET_PROPERTY :ref:`FE_GET_PROPERTY` +replace ioctl FE_GET_PROPERTY :ref:`FE_GET_PROPERTY` + +# Typedefs that use the enum reference +replace typedef fe_sec_voltage_t :c:type:`fe_sec_voltage` + +# Replaces for flag constants +replace define FE_TUNE_MODE_ONESHOT :ref:`FE_SET_FRONTEND_TUNE_MODE` +replace define LNA_AUTO dtv-lna +replace define NO_STREAM_ID_FILTER dtv-stream-id + +# Those enums are defined at the frontend.h header, and not externally + +ignore symbol FE_IS_STUPID +ignore symbol FE_CAN_INVERSION_AUTO +ignore symbol FE_CAN_FEC_1_2 +ignore symbol FE_CAN_FEC_2_3 +ignore symbol FE_CAN_FEC_3_4 +ignore symbol FE_CAN_FEC_4_5 +ignore symbol FE_CAN_FEC_5_6 +ignore symbol FE_CAN_FEC_6_7 +ignore symbol FE_CAN_FEC_7_8 +ignore symbol FE_CAN_FEC_8_9 +ignore symbol FE_CAN_FEC_AUTO +ignore symbol FE_CAN_QPSK +ignore symbol FE_CAN_QAM_16 +ignore symbol FE_CAN_QAM_32 +ignore symbol FE_CAN_QAM_64 +ignore symbol FE_CAN_QAM_128 +ignore symbol FE_CAN_QAM_256 +ignore symbol FE_CAN_QAM_AUTO +ignore symbol FE_CAN_TRANSMISSION_MODE_AUTO +ignore symbol FE_CAN_BANDWIDTH_AUTO +ignore symbol FE_CAN_GUARD_INTERVAL_AUTO +ignore symbol FE_CAN_HIERARCHY_AUTO +ignore symbol FE_CAN_8VSB +ignore symbol FE_CAN_16VSB +ignore symbol FE_HAS_EXTENDED_CAPS +ignore symbol FE_CAN_MULTISTREAM +ignore symbol FE_CAN_TURBO_FEC +ignore symbol FE_CAN_2G_MODULATION +ignore symbol FE_NEEDS_BENDING +ignore symbol FE_CAN_RECOVER +ignore symbol FE_CAN_MUTE_TS + +ignore symbol QPSK +ignore symbol QAM_16 +ignore symbol QAM_32 +ignore symbol QAM_64 +ignore symbol QAM_128 +ignore symbol QAM_256 +ignore symbol QAM_AUTO +ignore symbol VSB_8 +ignore symbol VSB_16 +ignore symbol PSK_8 +ignore symbol APSK_16 +ignore symbol APSK_32 +ignore symbol DQPSK +ignore symbol QAM_4_NR +ignore symbol QAM_1024 +ignore symbol QAM_4096 +ignore symbol APSK_8_L +ignore symbol APSK_16_L +ignore symbol APSK_32_L +ignore symbol APSK_64 +ignore symbol APSK_64_L + +ignore symbol SEC_VOLTAGE_13 +ignore symbol SEC_VOLTAGE_18 +ignore symbol SEC_VOLTAGE_OFF + +ignore symbol SEC_TONE_ON +ignore symbol SEC_TONE_OFF + +ignore symbol SEC_MINI_A +ignore symbol SEC_MINI_B + +ignore symbol FE_NONE +ignore symbol FE_HAS_SIGNAL +ignore symbol FE_HAS_CARRIER +ignore symbol FE_HAS_VITERBI +ignore symbol FE_HAS_SYNC +ignore symbol FE_HAS_LOCK +ignore symbol FE_REINIT +ignore symbol FE_TIMEDOUT + +ignore symbol FEC_NONE +ignore symbol FEC_1_2 +ignore symbol FEC_2_3 +ignore symbol FEC_3_4 +ignore symbol FEC_4_5 +ignore symbol FEC_5_6 +ignore symbol FEC_6_7 +ignore symbol FEC_7_8 +ignore symbol FEC_8_9 +ignore symbol FEC_AUTO +ignore symbol FEC_3_5 +ignore symbol FEC_9_10 +ignore symbol FEC_2_5 +ignore symbol FEC_1_3 +ignore symbol FEC_1_4 +ignore symbol FEC_5_9 +ignore symbol FEC_7_9 +ignore symbol FEC_8_15 +ignore symbol FEC_11_15 +ignore symbol FEC_13_18 +ignore symbol FEC_9_20 +ignore symbol FEC_11_20 +ignore symbol FEC_23_36 +ignore symbol FEC_25_36 +ignore symbol FEC_13_45 +ignore symbol FEC_26_45 +ignore symbol FEC_28_45 +ignore symbol FEC_32_45 +ignore symbol FEC_77_90 +ignore symbol FEC_11_45 +ignore symbol FEC_4_15 +ignore symbol FEC_14_45 +ignore symbol FEC_7_15 + +ignore symbol TRANSMISSION_MODE_AUTO +ignore symbol TRANSMISSION_MODE_1K +ignore symbol TRANSMISSION_MODE_2K +ignore symbol TRANSMISSION_MODE_8K +ignore symbol TRANSMISSION_MODE_4K +ignore symbol TRANSMISSION_MODE_16K +ignore symbol TRANSMISSION_MODE_32K +ignore symbol TRANSMISSION_MODE_C1 +ignore symbol TRANSMISSION_MODE_C3780 +ignore symbol TRANSMISSION_MODE_2K +ignore symbol TRANSMISSION_MODE_8K + +ignore symbol GUARD_INTERVAL_AUTO +ignore symbol GUARD_INTERVAL_1_128 +ignore symbol GUARD_INTERVAL_1_32 +ignore symbol GUARD_INTERVAL_1_16 +ignore symbol GUARD_INTERVAL_1_8 +ignore symbol GUARD_INTERVAL_1_4 +ignore symbol GUARD_INTERVAL_19_128 +ignore symbol GUARD_INTERVAL_19_256 +ignore symbol GUARD_INTERVAL_PN420 +ignore symbol GUARD_INTERVAL_PN595 +ignore symbol GUARD_INTERVAL_PN945 +ignore symbol GUARD_INTERVAL_1_64 + +ignore symbol HIERARCHY_NONE +ignore symbol HIERARCHY_AUTO +ignore symbol HIERARCHY_1 +ignore symbol HIERARCHY_2 +ignore symbol HIERARCHY_4 + +ignore symbol INTERLEAVING_NONE +ignore symbol INTERLEAVING_AUTO +ignore symbol INTERLEAVING_240 +ignore symbol INTERLEAVING_720 + +ignore symbol PILOT_ON +ignore symbol PILOT_OFF +ignore symbol PILOT_AUTO + +ignore symbol ROLLOFF_35 +ignore symbol ROLLOFF_20 +ignore symbol ROLLOFF_25 +ignore symbol ROLLOFF_AUTO +ignore symbol ROLLOFF_15 +ignore symbol ROLLOFF_10 +ignore symbol ROLLOFF_5 + +ignore symbol INVERSION_ON +ignore symbol INVERSION_OFF +ignore symbol INVERSION_AUTO + +ignore symbol SYS_UNDEFINED +ignore symbol SYS_DVBC_ANNEX_A +ignore symbol SYS_DVBC_ANNEX_B +ignore symbol SYS_DVBC_ANNEX_C +ignore symbol SYS_ISDBC +ignore symbol SYS_DVBT +ignore symbol SYS_DVBT2 +ignore symbol SYS_ISDBT +ignore symbol SYS_ATSC +ignore symbol SYS_ATSCMH +ignore symbol SYS_DTMB +ignore symbol SYS_DVBS +ignore symbol SYS_DVBS2 +ignore symbol SYS_TURBO +ignore symbol SYS_ISDBS +ignore symbol SYS_DAB +ignore symbol SYS_DSS +ignore symbol SYS_CMMB +ignore symbol SYS_DVBH +ignore symbol SYS_DVBC2 + +ignore symbol ATSCMH_SCCC_BLK_SEP +ignore symbol ATSCMH_SCCC_BLK_COMB +ignore symbol ATSCMH_SCCC_BLK_RES + +ignore symbol ATSCMH_SCCC_CODE_HLF +ignore symbol ATSCMH_SCCC_CODE_QTR +ignore symbol ATSCMH_SCCC_CODE_RES + +ignore symbol ATSCMH_RSFRAME_ENS_PRI +ignore symbol ATSCMH_RSFRAME_ENS_SEC + +ignore symbol ATSCMH_RSFRAME_PRI_ONLY +ignore symbol ATSCMH_RSFRAME_PRI_SEC +ignore symbol ATSCMH_RSFRAME_RES + +ignore symbol ATSCMH_RSCODE_211_187 +ignore symbol ATSCMH_RSCODE_223_187 +ignore symbol ATSCMH_RSCODE_235_187 +ignore symbol ATSCMH_RSCODE_RES + +ignore symbol FE_SCALE_NOT_AVAILABLE +ignore symbol FE_SCALE_DECIBEL +ignore symbol FE_SCALE_RELATIVE +ignore symbol FE_SCALE_COUNTER diff --git a/Documentation/userspace-api/media/dvb/frontend.rst b/Documentation/userspace-api/media/dvb/frontend.rst new file mode 100644 index 000000000..1df68730f --- /dev/null +++ b/Documentation/userspace-api/media/dvb/frontend.rst @@ -0,0 +1,56 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. _dvb_frontend: + +####################### +Digital TV Frontend API +####################### + +The Digital TV frontend API was designed to support three groups of delivery +systems: Terrestrial, cable and Satellite. Currently, the following +delivery systems are supported: + +- Terrestrial systems: DVB-T, DVB-T2, ATSC, ATSC M/H, ISDB-T, DVB-H, + DTMB, CMMB + +- Cable systems: DVB-C Annex A/C, ClearQAM (DVB-C Annex B) + +- Satellite systems: DVB-S, DVB-S2, DVB Turbo, ISDB-S, DSS + +The Digital TV frontend controls several sub-devices including: + +- Tuner + +- Digital TV demodulator + +- Low noise amplifier (LNA) + +- Satellite Equipment Control (SEC) [#f1]_. + +The frontend can be accessed through ``/dev/dvb/adapter?/frontend?``. +Data types and ioctl definitions can be accessed by including +``linux/dvb/frontend.h`` in your application. + +.. note:: + + Transmission via the internet (DVB-IP) and MMT (MPEG Media Transport) + is not yet handled by this API but a future extension is possible. + +.. [#f1] + + On Satellite systems, the API support for the Satellite Equipment + Control (SEC) allows to power control and to send/receive signals to + control the antenna subsystem, selecting the polarization and choosing + the Intermediate Frequency IF) of the Low Noise Block Converter Feed + Horn (LNBf). It supports the DiSEqC and V-SEC protocols. The DiSEqC + (digital SEC) specification is available at + `Eutelsat `__. + + +.. toctree:: + :maxdepth: 1 + + query-dvb-frontend-info + dvb-fe-read-status + dvbproperty + frontend_fcalls diff --git a/Documentation/userspace-api/media/dvb/frontend_f_close.rst b/Documentation/userspace-api/media/dvb/frontend_f_close.rst new file mode 100644 index 000000000..52c323a85 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/frontend_f_close.rst @@ -0,0 +1,46 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _frontend_f_close: + +*************************** +Digital TV frontend close() +*************************** + +Name +==== + +fe-close - Close a frontend device + +Synopsis +======== + +.. code-block:: c + + #include + +.. c:function:: int close( int fd ) + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +Description +=========== + +This system call closes a previously opened front-end device. After +closing a front-end device, its corresponding hardware might be powered +down automatically. + +Return Value +============ + +On success 0 is returned. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +Generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/frontend_f_open.rst b/Documentation/userspace-api/media/dvb/frontend_f_open.rst new file mode 100644 index 000000000..70e169b8f --- /dev/null +++ b/Documentation/userspace-api/media/dvb/frontend_f_open.rst @@ -0,0 +1,104 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: DTV.fe + +.. _frontend_f_open: + +*************************** +Digital TV frontend open() +*************************** + +Name +==== + +fe-open - Open a frontend device + +Synopsis +======== + +.. code-block:: c + + #include + +.. c:function:: int open( const char *device_name, int flags ) + +Arguments +========= + +``device_name`` + Device to be opened. + +``flags`` + Open flags. Access can either be ``O_RDWR`` or ``O_RDONLY``. + + Multiple opens are allowed with ``O_RDONLY``. In this mode, only + query and read ioctls are allowed. + + Only one open is allowed in ``O_RDWR``. In this mode, all ioctls are + allowed. + + When the ``O_NONBLOCK`` flag is given, the system calls may return + ``EAGAIN`` error code when no data is available or when the device + driver is temporarily busy. + + Other flags have no effect. + +Description +=========== + +This system call opens a named frontend device +(``/dev/dvb/adapter?/frontend?``) for subsequent use. Usually the first +thing to do after a successful open is to find out the frontend type +with :ref:`FE_GET_INFO`. + +The device can be opened in read-only mode, which only allows monitoring +of device status and statistics, or read/write mode, which allows any +kind of use (e.g. performing tuning operations.) + +In a system with multiple front-ends, it is usually the case that +multiple devices cannot be open in read/write mode simultaneously. As +long as a front-end device is opened in read/write mode, other open() +calls in read/write mode will either fail or block, depending on whether +non-blocking or blocking mode was specified. A front-end device opened +in blocking mode can later be put into non-blocking mode (and vice +versa) using the F_SETFL command of the fcntl system call. This is a +standard system call, documented in the Linux manual page for fcntl. +When an open() call has succeeded, the device will be ready for use in +the specified mode. This implies that the corresponding hardware is +powered up, and that other front-ends may have been powered down to make +that possible. + +Return Value +============ + +On success :c:func:`open()` returns the new file descriptor. +On error, -1 is returned, and the ``errno`` variable is set appropriately. + +Possible error codes are: + +On success 0 is returned, and :c:type:`ca_slot_info` is filled. + +On error -1 is returned, and the ``errno`` variable is set +appropriately. + +.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + :widths: 1 16 + + - - ``EPERM`` + - The caller has no permission to access the device. + + - - ``EBUSY`` + - The device driver is already in use. + + - - ``EMFILE`` + - The process already has the maximum number of files open. + + - - ``ENFILE`` + - The limit on the total number of files open on the system has been + reached. + +The generic error codes are described at the +:ref:`Generic Error Codes ` chapter. diff --git a/Documentation/userspace-api/media/dvb/frontend_fcalls.rst b/Documentation/userspace-api/media/dvb/frontend_fcalls.rst new file mode 100644 index 000000000..1df27b6e8 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/frontend_fcalls.rst @@ -0,0 +1,24 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. _frontend_fcalls: + +####################### +Frontend Function Calls +####################### + +.. toctree:: + :maxdepth: 1 + + frontend_f_open + frontend_f_close + fe-get-info + fe-read-status + fe-get-property + fe-diseqc-reset-overload + fe-diseqc-send-master-cmd + fe-diseqc-recv-slave-reply + fe-diseqc-send-burst + fe-set-tone + fe-set-voltage + fe-enable-high-lnb-voltage + fe-set-frontend-tune-mode diff --git a/Documentation/userspace-api/media/dvb/frontend_legacy_api.rst b/Documentation/userspace-api/media/dvb/frontend_legacy_api.rst new file mode 100644 index 000000000..535828c00 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/frontend_legacy_api.rst @@ -0,0 +1,38 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. _frontend_legacy_types: + +Frontend Legacy Data Types +========================== + + +.. toctree:: + :maxdepth: 1 + + fe-type-t + fe-bandwidth-t + dvb-frontend-parameters + dvb-frontend-event + + +.. _frontend_legacy_fcalls: + +Frontend Legacy Function Calls +============================== + +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 + + +.. toctree:: + :maxdepth: 1 + + fe-read-ber + fe-read-snr + fe-read-signal-strength + fe-read-uncorrected-blocks + fe-set-frontend + fe-get-frontend + fe-get-event + fe-dishnetwork-send-legacy-cmd diff --git a/Documentation/userspace-api/media/dvb/frontend_legacy_dvbv3_api.rst b/Documentation/userspace-api/media/dvb/frontend_legacy_dvbv3_api.rst new file mode 100644 index 000000000..09de723c2 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/frontend_legacy_dvbv3_api.rst @@ -0,0 +1,18 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. _frontend_legacy_dvbv3_api: + +*********************************************** +Digital TV Frontend legacy API (a. k. a. DVBv3) +*********************************************** + +The usage of this API is deprecated, as it doesn't support all digital +TV standards, doesn't provide good statistics measurements and provides +incomplete information. This is kept only to support legacy +applications. + + +.. toctree:: + :maxdepth: 1 + + frontend_legacy_api diff --git a/Documentation/userspace-api/media/dvb/headers.rst b/Documentation/userspace-api/media/dvb/headers.rst new file mode 100644 index 000000000..6d69622bf --- /dev/null +++ b/Documentation/userspace-api/media/dvb/headers.rst @@ -0,0 +1,46 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +*********************** +Digital TV uAPI symbols +*********************** + +.. contents:: Table of Contents + :depth: 2 + :local: + +Frontend +======== + +.. kernel-include:: include/uapi/linux/dvb/frontend.h + :generate-cross-refs: + :exception-file: frontend.h.rst.exceptions + :toc: + :warn-broken: + +Demux +===== + +.. kernel-include:: include/uapi/linux/dvb/dmx.h + :generate-cross-refs: + :exception-file: dmx.h.rst.exceptions + :toc: + :warn-broken: + +Conditional Access +================== + +.. kernel-include:: include/uapi/linux/dvb/ca.h + :generate-cross-refs: + :exception-file: ca.h.rst.exceptions + :toc: + :warn-broken: + +Network +======= + +.. kernel-include:: include/uapi/linux/dvb/net.h + :generate-cross-refs: + :exception-file: net.h.rst.exceptions + :toc: + :warn-broken: + diff --git a/Documentation/userspace-api/media/dvb/intro.rst b/Documentation/userspace-api/media/dvb/intro.rst new file mode 100644 index 000000000..854c2073e --- /dev/null +++ b/Documentation/userspace-api/media/dvb/intro.rst @@ -0,0 +1,183 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. _dvb_introduction: + +************ +Introduction +************ + + +.. _requisites: + +What you need to know +===================== + +The reader of this document is required to have some knowledge in the +area of digital video broadcasting (Digital TV) and should be familiar with +part I of the MPEG2 specification ISO/IEC 13818 (aka ITU-T H.222), i.e +you should know what a program/transport stream (PS/TS) is and what is +meant by a packetized elementary stream (PES) or an I-frame. + +Various Digital TV standards documents are available for download at: + +- European standards (DVB): http://www.dvb.org and/or http://www.etsi.org. +- American standards (ATSC): https://www.atsc.org/standards/ +- Japanese standards (ISDB): http://www.dibeg.org/ + +It is also necessary to know how to access Linux devices and how to +use ioctl calls. This also includes the knowledge of C or C++. + + +.. _history: + +History +======= + +The first API for Digital TV cards we used at Convergence in late 1999 was an +extension of the Video4Linux API which was primarily developed for frame +grabber cards. As such it was not really well suited to be used for Digital +TV cards and their new features like recording MPEG streams and filtering +several section and PES data streams at the same time. + +In early 2000, Convergence was approached by Nokia with a proposal for a new +standard Linux Digital TV API. As a commitment to the development of terminals +based on open standards, Nokia and Convergence made it available to all +Linux developers and published it on https://linuxtv.org in September +2000. With the Linux driver for the Siemens/Hauppauge DVB PCI card, +Convergence provided a first implementation of the Linux Digital TV API. +Convergence was the maintainer of the Linux Digital TV API in the early +days. + +Now, the API is maintained by the LinuxTV community (i.e. you, the reader +of this document). The Linux Digital TV API is constantly reviewed and +improved together with the improvements at the subsystem's core at the +Kernel. + + +.. _overview: + +Overview +======== + + +.. _stb_components: + +.. kernel-figure:: dvbstb.svg + :alt: dvbstb.svg + :align: center + + Components of a Digital TV card/STB + +A Digital TV card or set-top-box (STB) usually consists of the +following main hardware components: + +Frontend consisting of tuner and digital TV demodulator + Here the raw signal reaches the digital TV hardware from a satellite dish or + antenna or directly from cable. The frontend down-converts and + demodulates this signal into an MPEG transport stream (TS). In case + of a satellite frontend, this includes a facility for satellite + equipment control (SEC), which allows control of LNB polarization, + multi feed switches or dish rotors. + +Conditional Access (CA) hardware like CI adapters and smartcard slots + The complete TS is passed through the CA hardware. Programs to which + the user has access (controlled by the smart card) are decoded in + real time and re-inserted into the TS. + + .. note:: + + Not every digital TV hardware provides conditional access hardware. + +Demultiplexer which filters the incoming Digital TV MPEG-TS stream + The demultiplexer splits the TS into its components like audio and + video streams. Besides usually several of such audio and video + streams it also contains data streams with information about the + programs offered in this or other streams of the same provider. + +Audio and video decoder + The main targets of the demultiplexer are audio and video + decoders. After decoding, they pass on the uncompressed audio and + video to the computer screen or to a TV set. + + .. note:: + + Modern hardware usually doesn't have a separate decoder hardware, as + such functionality can be provided by the main CPU, by the graphics + adapter of the system or by a signal processing hardware embedded on + a Systems on a Chip (SoC) integrated circuit. + + It may also not be needed for certain usages (e.g. for data-only + uses like "internet over satellite"). + +:ref:`stb_components` shows a crude schematic of the control and data +flow between those components. + + + +.. _dvb_devices: + +Linux Digital TV Devices +======================== + +The Linux Digital TV API lets you control these hardware components through +currently six Unix-style character devices for video, audio, frontend, +demux, CA and IP-over-DVB networking. The video and audio devices +control the MPEG2 decoder hardware, the frontend device the tuner and +the Digital TV demodulator. The demux device gives you control over the PES +and section filters of the hardware. If the hardware does not support +filtering, these filters can be implemented in software. Finally, the CA +device controls all the conditional access capabilities of the hardware. +It can depend on the individual security requirements of the platform, +if and how many of the CA functions are made available to the +application through this device. + +All devices can be found in the ``/dev`` tree under ``/dev/dvb``. The +individual devices are called: + +- ``/dev/dvb/adapterN/audioM``, + +- ``/dev/dvb/adapterN/videoM``, + +- ``/dev/dvb/adapterN/frontendM``, + +- ``/dev/dvb/adapterN/netM``, + +- ``/dev/dvb/adapterN/demuxM``, + +- ``/dev/dvb/adapterN/dvrM``, + +- ``/dev/dvb/adapterN/caM``, + +where ``N`` enumerates the Digital TV cards in a system starting from 0, and +``M`` enumerates the devices of each type within each adapter, starting +from 0, too. We will omit the "``/dev/dvb/adapterN/``\ " in the further +discussion of these devices. + +More details about the data structures and function calls of all the +devices are described in the following chapters. + + +.. _include_files: + +API include files +================= + +For each of the Digital TV devices a corresponding include file exists. The +Digital TV API include files should be included in application sources with a +partial path like: + + +.. code-block:: c + + #include + + #include + + #include + + #include + + +To enable applications to support different API version, an additional +include file ``linux/dvb/version.h`` exists, which defines the constant +``DVB_API_VERSION``. This document describes ``DVB_API_VERSION 5.10``. diff --git a/Documentation/userspace-api/media/dvb/legacy_dvb_apis.rst b/Documentation/userspace-api/media/dvb/legacy_dvb_apis.rst new file mode 100644 index 000000000..ffe832574 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/legacy_dvb_apis.rst @@ -0,0 +1,26 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. _legacy_dvb_apis: + +*************************** +Digital TV Deprecated APIs +*************************** + +The APIs described here **should not** be used on new drivers or applications. + +The DVBv3 frontend API has issues with new delivery systems, including +DVB-S2, DVB-T2, ISDB, etc. + +.. attention:: + + The APIs described here doesn't necessarily reflect the current + code implementation, as this section of the document was written + for DVB version 1, while the code reflects DVB version 3 + implementation. + + +.. toctree:: + :maxdepth: 1 + + frontend_legacy_dvbv3_api + legacy_dvb_decoder_api diff --git a/Documentation/userspace-api/media/dvb/legacy_dvb_audio.rst b/Documentation/userspace-api/media/dvb/legacy_dvb_audio.rst new file mode 100644 index 000000000..99ffda355 --- /dev/null +++ b/Documentation/userspace-api/media/dvb/legacy_dvb_audio.rst @@ -0,0 +1,1642 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later OR GPL-2.0 + +.. c:namespace:: dtv.legacy.audio + +.. _dvb_audio: + +================ +DVB Audio Device +================ + +.. attention:: Do **not** use in new drivers! + See: :ref:`legacy_dvb_decoder_notes` + +The DVB audio device controls the MPEG2 audio decoder of the DVB +hardware. It can be accessed through ``/dev/dvb/adapter?/audio?``. Data +types and ioctl definitions can be accessed by including +``linux/dvb/audio.h`` in your application. + +Please note that most DVB cards don’t have their own MPEG decoder, which +results in the omission of the audio and video device. + +These ioctls were also used by V4L2 to control MPEG decoders implemented +in V4L2. The use of these ioctls for that purpose has been made obsolete +and proper V4L2 ioctls or controls have been created to replace that +functionality. Use :ref:`V4L2 ioctls