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-rw-r--r--Documentation/userspace-api/media/dvb/ca-fclose.rst40
-rw-r--r--Documentation/userspace-api/media/dvb/ca-fopen.rst72
-rw-r--r--Documentation/userspace-api/media/dvb/ca-get-cap.rst46
-rw-r--r--Documentation/userspace-api/media/dvb/ca-get-descr-info.rst43
-rw-r--r--Documentation/userspace-api/media/dvb/ca-get-msg.rst50
-rw-r--r--Documentation/userspace-api/media/dvb/ca-get-slot-info.rst56
-rw-r--r--Documentation/userspace-api/media/dvb/ca-reset.rst43
-rw-r--r--Documentation/userspace-api/media/dvb/ca-send-msg.rst50
-rw-r--r--Documentation/userspace-api/media/dvb/ca-set-descr.rst46
-rw-r--r--Documentation/userspace-api/media/dvb/ca.rst25
-rw-r--r--Documentation/userspace-api/media/dvb/ca_data_types.rst9
-rw-r--r--Documentation/userspace-api/media/dvb/ca_function_calls.rst20
-rw-r--r--Documentation/userspace-api/media/dvb/ca_high_level.rst157
-rw-r--r--Documentation/userspace-api/media/dvb/demux.rst23
-rw-r--r--Documentation/userspace-api/media/dvb/dmx-add-pid.rst47
-rw-r--r--Documentation/userspace-api/media/dvb/dmx-expbuf.rst87
-rw-r--r--Documentation/userspace-api/media/dvb/dmx-fclose.rst42
-rw-r--r--Documentation/userspace-api/media/dvb/dmx-fopen.rst88
-rw-r--r--Documentation/userspace-api/media/dvb/dmx-fread.rst77
-rw-r--r--Documentation/userspace-api/media/dvb/dmx-fwrite.rst70
-rw-r--r--Documentation/userspace-api/media/dvb/dmx-get-pes-pids.rst62
-rw-r--r--Documentation/userspace-api/media/dvb/dmx-get-stc.rst64
-rw-r--r--Documentation/userspace-api/media/dvb/dmx-mmap.rst115
-rw-r--r--Documentation/userspace-api/media/dvb/dmx-munmap.rst52
-rw-r--r--Documentation/userspace-api/media/dvb/dmx-qbuf.rst85
-rw-r--r--Documentation/userspace-api/media/dvb/dmx-querybuf.rst64
-rw-r--r--Documentation/userspace-api/media/dvb/dmx-remove-pid.rst48
-rw-r--r--Documentation/userspace-api/media/dvb/dmx-reqbufs.rst75
-rw-r--r--Documentation/userspace-api/media/dvb/dmx-set-buffer-size.rst48
-rw-r--r--Documentation/userspace-api/media/dvb/dmx-set-filter.rst55
-rw-r--r--Documentation/userspace-api/media/dvb/dmx-set-pes-filter.rst64
-rw-r--r--Documentation/userspace-api/media/dvb/dmx-start.rst65
-rw-r--r--Documentation/userspace-api/media/dvb/dmx-stop.rst44
-rw-r--r--Documentation/userspace-api/media/dvb/dmx_fcalls.rst30
-rw-r--r--Documentation/userspace-api/media/dvb/dmx_types.rst9
-rw-r--r--Documentation/userspace-api/media/dvb/dvb-fe-read-status.rst25
-rw-r--r--Documentation/userspace-api/media/dvb/dvb-frontend-event.rst15
-rw-r--r--Documentation/userspace-api/media/dvb/dvb-frontend-parameters.rst119
-rw-r--r--Documentation/userspace-api/media/dvb/dvbapi.rst118
-rw-r--r--Documentation/userspace-api/media/dvb/dvbproperty.rst126
-rw-r--r--Documentation/userspace-api/media/dvb/dvbstb.svg17
-rw-r--r--Documentation/userspace-api/media/dvb/examples.rst16
-rw-r--r--Documentation/userspace-api/media/dvb/fe-bandwidth-t.rst74
-rw-r--r--Documentation/userspace-api/media/dvb/fe-diseqc-recv-slave-reply.rst47
-rw-r--r--Documentation/userspace-api/media/dvb/fe-diseqc-reset-overload.rst45
-rw-r--r--Documentation/userspace-api/media/dvb/fe-diseqc-send-burst.rst50
-rw-r--r--Documentation/userspace-api/media/dvb/fe-diseqc-send-master-cmd.rst48
-rw-r--r--Documentation/userspace-api/media/dvb/fe-dishnetwork-send-legacy-cmd.rst53
-rw-r--r--Documentation/userspace-api/media/dvb/fe-enable-high-lnb-voltage.rst52
-rw-r--r--Documentation/userspace-api/media/dvb/fe-get-event.rst67
-rw-r--r--Documentation/userspace-api/media/dvb/fe-get-frontend.rst58
-rw-r--r--Documentation/userspace-api/media/dvb/fe-get-info.rst59
-rw-r--r--Documentation/userspace-api/media/dvb/fe-get-property.rst75
-rw-r--r--Documentation/userspace-api/media/dvb/fe-read-ber.rst49
-rw-r--r--Documentation/userspace-api/media/dvb/fe-read-signal-strength.rst49
-rw-r--r--Documentation/userspace-api/media/dvb/fe-read-snr.rst49
-rw-r--r--Documentation/userspace-api/media/dvb/fe-read-status.rst62
-rw-r--r--Documentation/userspace-api/media/dvb/fe-read-uncorrected-blocks.rst51
-rw-r--r--Documentation/userspace-api/media/dvb/fe-set-frontend-tune-mode.rst55
-rw-r--r--Documentation/userspace-api/media/dvb/fe-set-frontend.rst68
-rw-r--r--Documentation/userspace-api/media/dvb/fe-set-tone.rst56
-rw-r--r--Documentation/userspace-api/media/dvb/fe-set-voltage.rst60
-rw-r--r--Documentation/userspace-api/media/dvb/fe-type-t.rst91
-rw-r--r--Documentation/userspace-api/media/dvb/fe_property_parameters.rst1007
-rw-r--r--Documentation/userspace-api/media/dvb/frontend-header.rst6
-rw-r--r--Documentation/userspace-api/media/dvb/frontend-property-cable-systems.rst75
-rw-r--r--Documentation/userspace-api/media/dvb/frontend-property-satellite-systems.rst105
-rw-r--r--Documentation/userspace-api/media/dvb/frontend-property-terrestrial-systems.rst294
-rw-r--r--Documentation/userspace-api/media/dvb/frontend-stat-properties.rst245
-rw-r--r--Documentation/userspace-api/media/dvb/frontend.rst56
-rw-r--r--Documentation/userspace-api/media/dvb/frontend_f_close.rst46
-rw-r--r--Documentation/userspace-api/media/dvb/frontend_f_open.rst104
-rw-r--r--Documentation/userspace-api/media/dvb/frontend_fcalls.rst24
-rw-r--r--Documentation/userspace-api/media/dvb/frontend_legacy_api.rst38
-rw-r--r--Documentation/userspace-api/media/dvb/frontend_legacy_dvbv3_api.rst18
-rw-r--r--Documentation/userspace-api/media/dvb/headers.rst16
-rw-r--r--Documentation/userspace-api/media/dvb/intro.rst183
-rw-r--r--Documentation/userspace-api/media/dvb/legacy_dvb_apis.rst25
-rw-r--r--Documentation/userspace-api/media/dvb/net-add-if.rst52
-rw-r--r--Documentation/userspace-api/media/dvb/net-get-if.rst50
-rw-r--r--Documentation/userspace-api/media/dvb/net-remove-if.rst46
-rw-r--r--Documentation/userspace-api/media/dvb/net-types.rst9
-rw-r--r--Documentation/userspace-api/media/dvb/net.rst41
-rw-r--r--Documentation/userspace-api/media/dvb/query-dvb-frontend-info.rst13
84 files changed, 6078 insertions, 0 deletions
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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` chapter.
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 <dmx_output>`.
+
+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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <dmx_sct_filter_params>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <dmx_ts_pes>`).
+Some hardware supports more than one STC, so you must specify which one by
+setting the :c:type:`num <dmx_stc>` 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 <gen-errors>` 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 <unistd.h>
+ #include <sys/mman.h>
+
+.. 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 <unistd.h>
+ #include <sys/mman.h>
+
+.. 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 <gen-errors>` 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 <gen-errors>` 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 <dmx_output>`, 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` chapter.
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..33458fbb8
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dmx_types.rst
@@ -0,0 +1,9 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _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 <FE_GET_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 <fe_status>` bit set). See
+ :ref:`Frontend statistics indicators <frontend-stat-properties>` 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 <FE_GET_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 <FE_GET_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..1dda69343
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dvbapi.rst
@@ -0,0 +1,118 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. include:: <isonum.txt>
+
+.. _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**
+
+.. only:: html
+
+ .. class:: toc-title
+
+ Table of Contents
+
+.. toctree::
+ :maxdepth: 5
+ :numbered:
+
+ intro
+ frontend
+ demux
+ ca
+ net
+ legacy_dvb_apis
+ examples
+ headers
+
+
+**********************
+Revision and Copyright
+**********************
+
+Authors:
+
+- J. K. Metzler, Ralph <rjkm@metzlerbros.de>
+
+ - Original author of the Digital TV API documentation.
+
+- O. C. Metzler, Marcus <rjkm@metzlerbros.de>
+
+ - Original author of the Digital TV API documentation.
+
+- Carvalho Chehab, Mauro <mchehab+samsung@kernel.org>
+
+ - 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 <FE_GET_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 <FE_GET_PROPERTY>` ioctl:
+
+ :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` = SYS_DVBC_ANNEX_A
+
+ :ref:`DTV_FREQUENCY <DTV-FREQUENCY>` = 651000000
+
+ :ref:`DTV_MODULATION <DTV-MODULATION>` = QAM_256
+
+ :ref:`DTV_INVERSION <DTV-INVERSION>` = INVERSION_AUTO
+
+ :ref:`DTV_SYMBOL_RATE <DTV-SYMBOL-RATE>` = 5217000
+
+ :ref:`DTV_INNER_FEC <DTV-INNER-FEC>` = FEC_3_4
+
+ :ref:`DTV_TUNE <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 <stdio.h>
+ #include <fcntl.h>
+ #include <sys/ioctl.h>
+ #include <linux/dvb/frontend.h>
+
+ 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 <https://linuxtv.org/docs/libdvbv5/index.html>`__, 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
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new file mode 100644
index 000000000..6f0ba98f9
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/dvbstb.svg
@@ -0,0 +1,17 @@
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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 <https://linuxtv.org/docs/libdvbv5/index.html>`__
+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 <gen-errors>` 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 <gen-errors>` 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..8fb73ee29
--- /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 enumered 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. <http://www.eutelsat.com/files/contributed/satellites/pdf/Diseqc/associated%20docs/simple_tone_burst_detec.pdf>`__
+
+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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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 <gen-errors>` 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..9f44bf946
--- /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 enumered 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 <gen-errors>` 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..c66771830
--- /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 enumered 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 <gen-errors>` 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 <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 <FE_GET_PROPERTY>`
+ioctl's, using the :ref:`DTV_DELIVERY_SYSTEM <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 <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 <FE_GET_PROPERTY>` using the
+:ref:`DTV_DELIVERY_SYSTEM <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..ecd84a879
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/fe_property_parameters.rst
@@ -0,0 +1,1007 @@
+.. 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<FE_GET_PROPERTY>`.
+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
+supports more multiple modulations.
+
+The modulation can be one of the types defined by enum :c:type:`fe_modulation`.
+
+Most of the digital TV standards offers 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-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.
+ISDB-T QPSK, DQPSK, 16-QAM and 64-QAM.
+ISDB-S 8-PSK, QPSK and BPSK.
+======================= =======================================================
+
+.. note::
+
+ 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. So, the Kernel will silently ignore any setting
+ :ref:`DTV-BANDWIDTH-HZ`. I will however fill it back with a
+ 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
+polarzation (horizontal/vertical). When using DiSEqC epuipment 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 subchannels: each segment is
+consisting of several subchannels 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.
+ #. Intervals ``GUARD_INTERVAL_1_128``, ``GUARD_INTERVAL_19_128``
+ and ``GUARD_INTERVAL_19_256`` are used only for DVB-T2 at
+ present.
+ #. 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-S2, DVB-T2 and ISDB-S.
+
+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-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 it's
+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 <DTV-API-VERSION>`
+
+- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
+
+- :ref:`DTV_TUNE <DTV-TUNE>`
+
+- :ref:`DTV_CLEAR <DTV-CLEAR>`
+
+- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
+
+- :ref:`DTV_MODULATION <DTV-MODULATION>`
+
+- :ref:`DTV_INVERSION <DTV-INVERSION>`
+
+- :ref:`DTV_SYMBOL_RATE <DTV-SYMBOL-RATE>`
+
+- :ref:`DTV_INNER_FEC <DTV-INNER-FEC>`
+
+- :ref:`DTV_LNA <DTV-LNA>`
+
+In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
+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 <DTV-API-VERSION>`
+
+- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
+
+- :ref:`DTV_TUNE <DTV-TUNE>`
+
+- :ref:`DTV_CLEAR <DTV-CLEAR>`
+
+- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
+
+- :ref:`DTV_MODULATION <DTV-MODULATION>`
+
+- :ref:`DTV_INVERSION <DTV-INVERSION>`
+
+- :ref:`DTV_LNA <DTV-LNA>`
+
+In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
+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 <DTV-API-VERSION>`
+
+- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
+
+- :ref:`DTV_TUNE <DTV-TUNE>`
+
+- :ref:`DTV_CLEAR <DTV-CLEAR>`
+
+- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
+
+- :ref:`DTV_INVERSION <DTV-INVERSION>`
+
+- :ref:`DTV_SYMBOL_RATE <DTV-SYMBOL-RATE>`
+
+- :ref:`DTV_INNER_FEC <DTV-INNER-FEC>`
+
+- :ref:`DTV_VOLTAGE <DTV-VOLTAGE>`
+
+- :ref:`DTV_TONE <DTV-TONE>`
+
+In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
+are also valid.
+
+Future implementations might add those two missing parameters:
+
+- :ref:`DTV_DISEQC_MASTER <DTV-DISEQC-MASTER>`
+
+- :ref:`DTV_DISEQC_SLAVE_REPLY <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 <DTV-MODULATION>`
+
+- :ref:`DTV_PILOT <DTV-PILOT>`
+
+- :ref:`DTV_ROLLOFF <DTV-ROLLOFF>`
+
+- :ref:`DTV_STREAM_ID <DTV-STREAM-ID>`
+
+- :ref:`DTV_SCRAMBLING_SEQUENCE_INDEX <DTV-SCRAMBLING-SEQUENCE-INDEX>`
+
+In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
+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 <DTV-MODULATION>`
+
+
+.. _isdbs-params:
+
+ISDB-S delivery system
+======================
+
+The following parameters are valid for ISDB-S:
+
+- :ref:`DTV_API_VERSION <DTV-API-VERSION>`
+
+- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
+
+- :ref:`DTV_TUNE <DTV-TUNE>`
+
+- :ref:`DTV_CLEAR <DTV-CLEAR>`
+
+- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
+
+- :ref:`DTV_INVERSION <DTV-INVERSION>`
+
+- :ref:`DTV_SYMBOL_RATE <DTV-SYMBOL-RATE>`
+
+- :ref:`DTV_INNER_FEC <DTV-INNER-FEC>`
+
+- :ref:`DTV_VOLTAGE <DTV-VOLTAGE>`
+
+- :ref:`DTV_STREAM_ID <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..8cd461cee
--- /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 <DTV-API-VERSION>`
+
+- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
+
+- :ref:`DTV_TUNE <DTV-TUNE>`
+
+- :ref:`DTV_CLEAR <DTV-CLEAR>`
+
+- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
+
+- :ref:`DTV_MODULATION <DTV-MODULATION>`
+
+- :ref:`DTV_BANDWIDTH_HZ <DTV-BANDWIDTH-HZ>`
+
+- :ref:`DTV_INVERSION <DTV-INVERSION>`
+
+- :ref:`DTV_CODE_RATE_HP <DTV-CODE-RATE-HP>`
+
+- :ref:`DTV_CODE_RATE_LP <DTV-CODE-RATE-LP>`
+
+- :ref:`DTV_GUARD_INTERVAL <DTV-GUARD-INTERVAL>`
+
+- :ref:`DTV_TRANSMISSION_MODE <DTV-TRANSMISSION-MODE>`
+
+- :ref:`DTV_HIERARCHY <DTV-HIERARCHY>`
+
+- :ref:`DTV_LNA <DTV-LNA>`
+
+In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
+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 maygrow and become more detailed with time.
+
+The following parameters are valid for DVB-T2:
+
+- :ref:`DTV_API_VERSION <DTV-API-VERSION>`
+
+- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
+
+- :ref:`DTV_TUNE <DTV-TUNE>`
+
+- :ref:`DTV_CLEAR <DTV-CLEAR>`
+
+- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
+
+- :ref:`DTV_MODULATION <DTV-MODULATION>`
+
+- :ref:`DTV_BANDWIDTH_HZ <DTV-BANDWIDTH-HZ>`
+
+- :ref:`DTV_INVERSION <DTV-INVERSION>`
+
+- :ref:`DTV_CODE_RATE_HP <DTV-CODE-RATE-HP>`
+
+- :ref:`DTV_CODE_RATE_LP <DTV-CODE-RATE-LP>`
+
+- :ref:`DTV_GUARD_INTERVAL <DTV-GUARD-INTERVAL>`
+
+- :ref:`DTV_TRANSMISSION_MODE <DTV-TRANSMISSION-MODE>`
+
+- :ref:`DTV_HIERARCHY <DTV-HIERARCHY>`
+
+- :ref:`DTV_STREAM_ID <DTV-STREAM-ID>`
+
+- :ref:`DTV_LNA <DTV-LNA>`
+
+In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
+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 <DTV-API-VERSION>`
+
+- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
+
+- :ref:`DTV_TUNE <DTV-TUNE>`
+
+- :ref:`DTV_CLEAR <DTV-CLEAR>`
+
+- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
+
+- :ref:`DTV_BANDWIDTH_HZ <DTV-BANDWIDTH-HZ>`
+
+- :ref:`DTV_INVERSION <DTV-INVERSION>`
+
+- :ref:`DTV_GUARD_INTERVAL <DTV-GUARD-INTERVAL>`
+
+- :ref:`DTV_TRANSMISSION_MODE <DTV-TRANSMISSION-MODE>`
+
+- :ref:`DTV_ISDBT_LAYER_ENABLED <DTV-ISDBT-LAYER-ENABLED>`
+
+- :ref:`DTV_ISDBT_PARTIAL_RECEPTION <DTV-ISDBT-PARTIAL-RECEPTION>`
+
+- :ref:`DTV_ISDBT_SOUND_BROADCASTING <DTV-ISDBT-SOUND-BROADCASTING>`
+
+- :ref:`DTV_ISDBT_SB_SUBCHANNEL_ID <DTV-ISDBT-SB-SUBCHANNEL-ID>`
+
+- :ref:`DTV_ISDBT_SB_SEGMENT_IDX <DTV-ISDBT-SB-SEGMENT-IDX>`
+
+- :ref:`DTV_ISDBT_SB_SEGMENT_COUNT <DTV-ISDBT-SB-SEGMENT-COUNT>`
+
+- :ref:`DTV_ISDBT_LAYERA_FEC <DTV-ISDBT-LAYER-FEC>`
+
+- :ref:`DTV_ISDBT_LAYERA_MODULATION <DTV-ISDBT-LAYER-MODULATION>`
+
+- :ref:`DTV_ISDBT_LAYERA_SEGMENT_COUNT <DTV-ISDBT-LAYER-SEGMENT-COUNT>`
+
+- :ref:`DTV_ISDBT_LAYERA_TIME_INTERLEAVING <DTV-ISDBT-LAYER-TIME-INTERLEAVING>`
+
+- :ref:`DTV_ISDBT_LAYERB_FEC <DTV-ISDBT-LAYER-FEC>`
+
+- :ref:`DTV_ISDBT_LAYERB_MODULATION <DTV-ISDBT-LAYER-MODULATION>`
+
+- :ref:`DTV_ISDBT_LAYERB_SEGMENT_COUNT <DTV-ISDBT-LAYER-SEGMENT-COUNT>`
+
+- :ref:`DTV_ISDBT_LAYERB_TIME_INTERLEAVING <DTV-ISDBT-LAYER-TIME-INTERLEAVING>`
+
+- :ref:`DTV_ISDBT_LAYERC_FEC <DTV-ISDBT-LAYER-FEC>`
+
+- :ref:`DTV_ISDBT_LAYERC_MODULATION <DTV-ISDBT-LAYER-MODULATION>`
+
+- :ref:`DTV_ISDBT_LAYERC_SEGMENT_COUNT <DTV-ISDBT-LAYER-SEGMENT-COUNT>`
+
+- :ref:`DTV_ISDBT_LAYERC_TIME_INTERLEAVING <DTV-ISDBT-LAYER-TIME-INTERLEAVING>`
+
+In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
+are also valid.
+
+
+.. _atsc-params:
+
+ATSC delivery system
+====================
+
+The following parameters are valid for ATSC:
+
+- :ref:`DTV_API_VERSION <DTV-API-VERSION>`
+
+- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
+
+- :ref:`DTV_TUNE <DTV-TUNE>`
+
+- :ref:`DTV_CLEAR <DTV-CLEAR>`
+
+- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
+
+- :ref:`DTV_MODULATION <DTV-MODULATION>`
+
+- :ref:`DTV_BANDWIDTH_HZ <DTV-BANDWIDTH-HZ>`
+
+In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
+are also valid.
+
+
+.. _atscmh-params:
+
+ATSC-MH delivery system
+=======================
+
+The following parameters are valid for ATSC-MH:
+
+- :ref:`DTV_API_VERSION <DTV-API-VERSION>`
+
+- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
+
+- :ref:`DTV_TUNE <DTV-TUNE>`
+
+- :ref:`DTV_CLEAR <DTV-CLEAR>`
+
+- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
+
+- :ref:`DTV_BANDWIDTH_HZ <DTV-BANDWIDTH-HZ>`
+
+- :ref:`DTV_ATSCMH_FIC_VER <DTV-ATSCMH-FIC-VER>`
+
+- :ref:`DTV_ATSCMH_PARADE_ID <DTV-ATSCMH-PARADE-ID>`
+
+- :ref:`DTV_ATSCMH_NOG <DTV-ATSCMH-NOG>`
+
+- :ref:`DTV_ATSCMH_TNOG <DTV-ATSCMH-TNOG>`
+
+- :ref:`DTV_ATSCMH_SGN <DTV-ATSCMH-SGN>`
+
+- :ref:`DTV_ATSCMH_PRC <DTV-ATSCMH-PRC>`
+
+- :ref:`DTV_ATSCMH_RS_FRAME_MODE <DTV-ATSCMH-RS-FRAME-MODE>`
+
+- :ref:`DTV_ATSCMH_RS_FRAME_ENSEMBLE <DTV-ATSCMH-RS-FRAME-ENSEMBLE>`
+
+- :ref:`DTV_ATSCMH_RS_CODE_MODE_PRI <DTV-ATSCMH-RS-CODE-MODE-PRI>`
+
+- :ref:`DTV_ATSCMH_RS_CODE_MODE_SEC <DTV-ATSCMH-RS-CODE-MODE-SEC>`
+
+- :ref:`DTV_ATSCMH_SCCC_BLOCK_MODE <DTV-ATSCMH-SCCC-BLOCK-MODE>`
+
+- :ref:`DTV_ATSCMH_SCCC_CODE_MODE_A <DTV-ATSCMH-SCCC-CODE-MODE-A>`
+
+- :ref:`DTV_ATSCMH_SCCC_CODE_MODE_B <DTV-ATSCMH-SCCC-CODE-MODE-B>`
+
+- :ref:`DTV_ATSCMH_SCCC_CODE_MODE_C <DTV-ATSCMH-SCCC-CODE-MODE-C>`
+
+- :ref:`DTV_ATSCMH_SCCC_CODE_MODE_D <DTV-ATSCMH-SCCC-CODE-MODE-D>`
+
+In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
+are also valid.
+
+
+.. _dtmb-params:
+
+DTMB delivery system
+====================
+
+The following parameters are valid for DTMB:
+
+- :ref:`DTV_API_VERSION <DTV-API-VERSION>`
+
+- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>`
+
+- :ref:`DTV_TUNE <DTV-TUNE>`
+
+- :ref:`DTV_CLEAR <DTV-CLEAR>`
+
+- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>`
+
+- :ref:`DTV_MODULATION <DTV-MODULATION>`
+
+- :ref:`DTV_BANDWIDTH_HZ <DTV-BANDWIDTH-HZ>`
+
+- :ref:`DTV_INVERSION <DTV-INVERSION>`
+
+- :ref:`DTV_INNER_FEC <DTV-INNER-FEC>`
+
+- :ref:`DTV_GUARD_INTERVAL <DTV-GUARD-INTERVAL>`
+
+- :ref:`DTV_TRANSMISSION_MODE <DTV-TRANSMISSION-MODE>`
+
+- :ref:`DTV_INTERLEAVING <DTV-INTERLEAVING>`
+
+- :ref:`DTV_LNA <DTV-LNA>`
+
+In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>`
+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 <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 <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 <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-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 <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 <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-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 <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 <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 <DTV-STAT-ERROR-BLOCK-COUNT>`.
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 <http://www.eutelsat.com/satellites/4_5_5.html>`__.
+
+
+.. 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 <unistd.h>
+
+.. 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 <gen-errors>` 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..bb37eded0
--- /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 <fcntl.h>
+
+.. 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 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 <gen-errors>` 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..88c3eb33a
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/headers.rst
@@ -0,0 +1,16 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+****************************
+Digital TV uAPI header files
+****************************
+
+Digital TV uAPI headers
+***********************
+
+.. kernel-include:: $BUILDDIR/frontend.h.rst
+
+.. kernel-include:: $BUILDDIR/dmx.h.rst
+
+.. kernel-include:: $BUILDDIR/ca.h.rst
+
+.. kernel-include:: $BUILDDIR/net.h.rst
diff --git a/Documentation/userspace-api/media/dvb/intro.rst b/Documentation/userspace-api/media/dvb/intro.rst
new file mode 100644
index 000000000..6784ae796
--- /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_introdution:
+
+************
+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 <linux/dvb/ca.h>
+
+ #include <linux/dvb/dmx.h>
+
+ #include <linux/dvb/frontend.h>
+
+ #include <linux/dvb/net.h>
+
+
+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..b97d56ee5
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/legacy_dvb_apis.rst
@@ -0,0 +1,25 @@
+.. 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
diff --git a/Documentation/userspace-api/media/dvb/net-add-if.rst b/Documentation/userspace-api/media/dvb/net-add-if.rst
new file mode 100644
index 000000000..022b4c626
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/net-add-if.rst
@@ -0,0 +1,52 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.net
+
+.. _NET_ADD_IF:
+
+****************
+ioctl NET_ADD_IF
+****************
+
+Name
+====
+
+NET_ADD_IF - Creates a new network interface for a given Packet ID.
+
+Synopsis
+========
+
+.. c:macro:: NET_ADD_IF
+
+``int ioctl(int fd, NET_ADD_IF, struct dvb_net_if *net_if)``
+
+Arguments
+=========
+
+``fd``
+ File descriptor returned by :c:func:`open()`.
+
+``net_if``
+ pointer to struct :c:type:`dvb_net_if`
+
+Description
+===========
+
+The NET_ADD_IF ioctl system call selects the Packet ID (PID) that
+contains a TCP/IP traffic, the type of encapsulation to be used (MPE or
+ULE) and the interface number for the new interface to be created. When
+the system call successfully returns, a new virtual network interface is
+created.
+
+The struct :c:type:`dvb_net_if`::ifnum field will be
+filled with the number of the created interface.
+
+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.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/net-get-if.rst b/Documentation/userspace-api/media/dvb/net-get-if.rst
new file mode 100644
index 000000000..e99696c9d
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/net-get-if.rst
@@ -0,0 +1,50 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.net
+
+.. _NET_GET_IF:
+
+****************
+ioctl NET_GET_IF
+****************
+
+Name
+====
+
+NET_GET_IF - Read the configuration data of an interface created via - :ref:`NET_ADD_IF <net>`.
+
+Synopsis
+========
+
+.. c:macro:: NET_GET_IF
+
+``int ioctl(int fd, NET_GET_IF, struct dvb_net_if *net_if)``
+
+Arguments
+=========
+
+``fd``
+ File descriptor returned by :c:func:`open()`.
+
+``net_if``
+ pointer to struct :c:type:`dvb_net_if`
+
+Description
+===========
+
+The NET_GET_IF ioctl uses the interface number given by the struct
+:c:type:`dvb_net_if`::ifnum field and fills the content of
+struct :c:type:`dvb_net_if` with the packet ID and
+encapsulation type used on such interface. If the interface was not
+created yet with :ref:`NET_ADD_IF <net>`, it will return -1 and fill
+the ``errno`` with ``EINVAL`` error code.
+
+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.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/net-remove-if.rst b/Documentation/userspace-api/media/dvb/net-remove-if.rst
new file mode 100644
index 000000000..ac88691c0
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/net-remove-if.rst
@@ -0,0 +1,46 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: DTV.net
+
+.. _NET_REMOVE_IF:
+
+*******************
+ioctl NET_REMOVE_IF
+*******************
+
+Name
+====
+
+NET_REMOVE_IF - Removes a network interface.
+
+Synopsis
+========
+
+.. c:macro:: NET_REMOVE_IF
+
+``int ioctl(int fd, NET_REMOVE_IF, int ifnum)``
+
+Arguments
+=========
+
+``fd``
+ File descriptor returned by :c:func:`open()`.
+
+``net_if``
+ number of the interface to be removed
+
+Description
+===========
+
+The NET_REMOVE_IF ioctl deletes an interface previously created via
+:ref:`NET_ADD_IF <net>`.
+
+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.
+
+The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.
diff --git a/Documentation/userspace-api/media/dvb/net-types.rst b/Documentation/userspace-api/media/dvb/net-types.rst
new file mode 100644
index 000000000..075264bc0
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/net-types.rst
@@ -0,0 +1,9 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _net_types:
+
+**************
+Net Data Types
+**************
+
+.. kernel-doc:: include/uapi/linux/dvb/net.h
diff --git a/Documentation/userspace-api/media/dvb/net.rst b/Documentation/userspace-api/media/dvb/net.rst
new file mode 100644
index 000000000..020a023d3
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/net.rst
@@ -0,0 +1,41 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _net:
+
+######################
+Digital TV Network API
+######################
+
+The Digital TV net device controls the mapping of data packages that are part
+of a transport stream to be mapped into a virtual network interface,
+visible through the standard Linux network protocol stack.
+
+Currently, two encapsulations are supported:
+
+- `Multi Protocol Encapsulation (MPE) <http://en.wikipedia.org/wiki/Multiprotocol_Encapsulation>`__
+
+- `Ultra Lightweight Encapsulation (ULE) <http://en.wikipedia.org/wiki/Unidirectional_Lightweight_Encapsulation>`__
+
+In order to create the Linux virtual network interfaces, an application
+needs to tell to the Kernel what are the PIDs and the encapsulation
+types that are present on the transport stream. This is done through
+``/dev/dvb/adapter?/net?`` device node. The data will be available via
+virtual ``dvb?_?`` network interfaces, and will be controlled/routed via
+the standard ip tools (like ip, route, netstat, ifconfig, etc).
+
+Data types and ioctl definitions are defined via ``linux/dvb/net.h``
+header.
+
+
+.. _net_fcalls:
+
+Digital TV net Function Calls
+#############################
+
+.. toctree::
+ :maxdepth: 1
+
+ net-types
+ net-add-if
+ net-remove-if
+ net-get-if
diff --git a/Documentation/userspace-api/media/dvb/query-dvb-frontend-info.rst b/Documentation/userspace-api/media/dvb/query-dvb-frontend-info.rst
new file mode 100644
index 000000000..f099b4935
--- /dev/null
+++ b/Documentation/userspace-api/media/dvb/query-dvb-frontend-info.rst
@@ -0,0 +1,13 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. _query-dvb-frontend-info:
+
+*****************************
+Querying frontend information
+*****************************
+
+Usually, the first thing to do when the frontend is opened is to check
+the frontend capabilities. This is done using
+:ref:`FE_GET_INFO`. This ioctl will enumerate the
+Digital TV API version and other characteristics about the frontend, and can
+be opened either in read only or read/write mode.