1 files changed, 0 insertions, 132 deletions
diff --git a/Documentation/DocBook/media/v4l/dev-sdr.xml b/Documentation/DocBook/media/v4l/dev-sdr.xml
deleted file mode 100644
index a659771f7b7c..000000000000
--- a/Documentation/DocBook/media/v4l/dev-sdr.xml
+++ /dev/null
@@ -1,132 +0,0 @@
-  <title>Software Defined Radio Interface (SDR)</title>
-
-  <note>
-    <title>Experimental</title>
-    <para>This is an <link linkend="experimental"> experimental </link>
-    interface and may change in the future.</para>
-  </note>
-
-  <para>
-SDR is an abbreviation of Software Defined Radio, the radio device
-which uses application software for modulation or demodulation. This interface
-is intended for controlling and data streaming of such devices.
-  </para>
-
-  <para>
-SDR devices are accessed through character device special files named
-<filename>/dev/swradio0</filename> to <filename>/dev/swradio255</filename>
-with major number 81 and dynamically allocated minor numbers 0 to 255.
-  </para>
-
-  <section>
-    <title>Querying Capabilities</title>
-
-    <para>
-Devices supporting the SDR receiver interface set the
-<constant>V4L2_CAP_SDR_CAPTURE</constant> and
-<constant>V4L2_CAP_TUNER</constant> flag in the
-<structfield>capabilities</structfield> field of &v4l2-capability;
-returned by the &VIDIOC-QUERYCAP; ioctl. That flag means the device has an
-Analog to Digital Converter (ADC), which is a mandatory element for the SDR receiver.
-    </para>
-    <para>
-Devices supporting the SDR transmitter interface set the
-<constant>V4L2_CAP_SDR_OUTPUT</constant> and
-<constant>V4L2_CAP_MODULATOR</constant> flag in the
-<structfield>capabilities</structfield> field of &v4l2-capability;
-returned by the &VIDIOC-QUERYCAP; ioctl. That flag means the device has an
-Digital to Analog Converter (DAC), which is a mandatory element for the SDR transmitter.
-    </para>
-    <para>
-At least one of the read/write, streaming or asynchronous I/O methods must
-be supported.
-    </para>
-  </section>
-
-  <section>
-    <title>Supplemental Functions</title>
-
-    <para>
-SDR devices can support <link linkend="control">controls</link>, and must
-support the <link linkend="tuner">tuner</link> ioctls. Tuner ioctls are used
-for setting the ADC/DAC sampling rate (sampling frequency) and the possible
-radio frequency (RF).
-    </para>
-
-    <para>
-The <constant>V4L2_TUNER_SDR</constant> tuner type is used for setting SDR
-device ADC/DAC frequency, and the <constant>V4L2_TUNER_RF</constant>
-tuner type is used for setting radio frequency.
-The tuner index of the RF tuner (if any) must always follow the SDR tuner index.
-Normally the SDR tuner is #0 and the RF tuner is #1.
-    </para>
-
-    <para>
-The &VIDIOC-S-HW-FREQ-SEEK; ioctl is not supported.
-    </para>
-  </section>
-
-  <section>
-    <title>Data Format Negotiation</title>
-
-    <para>
-The SDR device uses the <link linkend="format">format</link> ioctls to
-select the capture and output format. Both the sampling resolution and the data
-streaming format are bound to that selectable format. In addition to the basic
-<link linkend="format">format</link> ioctls, the &VIDIOC-ENUM-FMT; ioctl
-must be supported as well.
-    </para>
-
-    <para>
-To use the <link linkend="format">format</link> ioctls applications set the
-<structfield>type</structfield> field of a &v4l2-format; to
-<constant>V4L2_BUF_TYPE_SDR_CAPTURE</constant> or
-<constant>V4L2_BUF_TYPE_SDR_OUTPUT</constant> and use the &v4l2-sdr-format;
-<structfield>sdr</structfield> member of the <structfield>fmt</structfield>
-union as needed per the desired operation.
-Currently there is two fields, <structfield>pixelformat</structfield> and
-<structfield>buffersize</structfield>, of struct &v4l2-sdr-format; which are
-used. Content of the <structfield>pixelformat</structfield> is V4L2 FourCC
-code of the data format. The <structfield>buffersize</structfield> field is
-maximum buffer size in bytes required for data transfer, set by the driver in
-order to inform application.
-    </para>
-
-    <table pgwide="1" frame="none" id="v4l2-sdr-format">
-      <title>struct <structname>v4l2_sdr_format</structname></title>
-      <tgroup cols="3">
-        &cs-str;
-        <tbody valign="top">
-          <row>
-            <entry>__u32</entry>
-            <entry><structfield>pixelformat</structfield></entry>
-            <entry>
-The data format or type of compression, set by the application. This is a
-little endian <link linkend="v4l2-fourcc">four character code</link>.
-V4L2 defines SDR formats in <xref linkend="sdr-formats" />.
-           </entry>
-          </row>
-          <row>
-            <entry>__u32</entry>
-            <entry><structfield>buffersize</structfield></entry>
-            <entry>
-Maximum size in bytes required for data. Value is set by the driver.
-           </entry>
-          </row>
-          <row>
-            <entry>__u8</entry>
-            <entry><structfield>reserved[24]</structfield></entry>
-            <entry>This array is reserved for future extensions.
-Drivers and applications must set it to zero.</entry>
-          </row>
-        </tbody>
-      </tgroup>
-    </table>
-
-    <para>
-An SDR device may support <link linkend="rw">read/write</link>
-and/or streaming (<link linkend="mmap">memory mapping</link>
-or <link linkend="userp">user pointer</link>) I/O.
-    </para>
-
-  </section>