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Merge branch 'topic/cec' into patchwork

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* topic/cec:
  [media] DocBook/media: add CEC documentation
  [media] s5p_cec: get rid of an unused var
  [media] move s5p-cec to staging
  [media] vivid: add CEC emulation
  [media] cec: s5p-cec: Add s5p-cec driver
  [media] cec: adv7511: add cec support
  [media] cec: adv7842: add cec support
  [media] cec: adv7604: add cec support
  [media] cec: add compat32 ioctl support
  [media] cec/TODO: add TODO file so we know why this is still in staging
  [media] cec: add HDMI CEC framework (api)
  [media] cec: add HDMI CEC framework (adapter)
  [media] cec: add HDMI CEC framework (core)
  [media] cec-funcs.h: static inlines to pack/unpack CEC messages
  [media] cec.h: add cec header
  [media] cec-edid: add module for EDID CEC helper functions
  [media] cec.txt: add CEC framework documentation
  [media] rc: Add HDMI CEC protocol handling
This commit is contained in:
Mauro Carvalho Chehab 2016-07-08 18:16:10 -03:00
commit cbb5c8355a
60 changed files with 10428 additions and 129 deletions
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3
Documentation/DocBook/device-drivers.tmpl
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@ -300,6 +300,9 @@ X!Isound/sound_firmware.c
!Iinclude/media/media-devnode.h
!Iinclude/media/media-entity.h
</sect1>
<sect1><title>Consumer Electronics Control devices</title>
!Iinclude/media/cec-edid.h
</sect1>
</chapter>

2
Documentation/DocBook/media/Makefile
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@ -64,6 +64,7 @@ IOCTLS = \
$(shell perl -ne 'print "$$1 " if /\#define\s+([A-Z][^\s]+)\s+_IO/' $(srctree)/include/uapi/linux/dvb/net.h) \
$(shell perl -ne 'print "$$1 " if /\#define\s+([^\s]+)\s+_IO/' $(srctree)/include/uapi/linux/dvb/video.h) \
$(shell perl -ne 'print "$$1 " if /\#define\s+([^\s]+)\s+_IO/' $(srctree)/include/uapi/linux/media.h) \
$(shell perl -ne 'print "$$1 " if /\#define\s+([^\s]+)\s+_IO/' $(srctree)/include/linux/cec.h) \
$(shell perl -ne 'print "$$1 " if /\#define\s+([^\s]+)\s+_IO/' $(srctree)/include/uapi/linux/v4l2-subdev.h) \
DEFINES = \
@ -100,6 +101,7 @@ STRUCTS = \
$(shell perl -ne 'print "$$1 " if (/^struct\s+([^\s]+)\s+/ && !/_old/)' $(srctree)/include/uapi/linux/dvb/net.h) \
$(shell perl -ne 'print "$$1 " if (/^struct\s+([^\s]+)\s+/)' $(srctree)/include/uapi/linux/dvb/video.h) \
$(shell perl -ne 'print "$$1 " if /^struct\s+([^\s]+)\s+/' $(srctree)/include/uapi/linux/media.h) \
$(shell perl -ne 'print "$$1 " if /^struct\s+([^\s]+)\s+/' $(srctree)/include/linux/cec.h) \
$(shell perl -ne 'print "$$1 " if /^struct\s+([^\s]+)\s+/' $(srctree)/include/uapi/linux/v4l2-subdev.h) \
$(shell perl -ne 'print "$$1 " if /^struct\s+([^\s]+)\s+/' $(srctree)/include/uapi/linux/v4l2-mediabus.h)

10
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@ -342,6 +342,16 @@ in the frequency range from 87,5 to 108,0 MHz</title>
<subtitle>Specification Version 1.4a</subtitle>
</biblioentry>
<biblioentry id="hdmi2">
<abbrev>HDMI2</abbrev>
<authorgroup>
<corpauthor>HDMI Licensing LLC
(<ulink url="http://www.hdmi.org">http://www.hdmi.org</ulink>)</corpauthor>
</authorgroup>
<title>High-Definition Multimedia Interface</title>
<subtitle>Specification Version 2.0</subtitle>
</biblioentry>
<biblioentry id="dp">
<abbrev>DP</abbrev>
<authorgroup>

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@ -0,0 +1,75 @@
<partinfo>
<authorgroup>
<author>
<firstname>Hans</firstname>
<surname>Verkuil</surname>
<affiliation><address><email>hans.verkuil@cisco.com</email></address></affiliation>
<contrib>Initial version.</contrib>
</author>
</authorgroup>
<copyright>
<year>2016</year>
<holder>Hans Verkuil</holder>
</copyright>
<revhistory>
<!-- Put document revisions here, newest first. -->
<revision>
<revnumber>1.0.0</revnumber>
<date>2016-03-17</date>
<authorinitials>hv</authorinitials>
<revremark>Initial revision</revremark>
</revision>
</revhistory>
</partinfo>
<title>CEC API</title>
<chapter id="cec-api">
<title>CEC: Consumer Electronics Control</title>
<section id="cec-intro">
<title>Introduction</title>
<para>
Note: this documents the proposed CEC API. This API is not yet finalized and
is currently only available as a staging kernel module.
</para>
<para>HDMI connectors provide a single pin for use by the Consumer Electronics
Control protocol. This protocol allows different devices connected by an HDMI cable
to communicate. The protocol for CEC version 1.4 is defined in supplements 1 (CEC)
and 2 (HEAC or HDMI Ethernet and Audio Return Channel) of the HDMI 1.4a
(<xref linkend="hdmi" />) specification and the extensions added to CEC version 2.0
are defined in chapter 11 of the HDMI 2.0 (<xref linkend="hdmi2" />) specification.
</para>
<para>The bitrate is very slow (effectively no more than 36 bytes per second) and
is based on the ancient AV.link protocol used in old SCART connectors. The protocol
closely resembles a crazy Rube Goldberg contraption and is an unholy mix of low and
high level messages. Some messages, especially those part of the HEAC protocol layered
on top of CEC, need to be handled by the kernel, others can be handled either by the
kernel or by userspace.</para>
<para>In addition, CEC can be implemented in HDMI receivers, transmitters and in USB
devices that have an HDMI input and an HDMI output and that control just the CEC pin.</para>
<para>Drivers that support CEC will create a CEC device node (/dev/cecX)
to give userspace access to the CEC adapter. The &CEC-ADAP-G-CAPS; ioctl will tell userspace
what it is allowed to do.</para>
</section>
</chapter>
<appendix id="cec-user-func">
<title>Function Reference</title>
<!-- Keep this alphabetically sorted. -->
&sub-cec-func-open;
&sub-cec-func-close;
&sub-cec-func-ioctl;
&sub-cec-func-poll;
<!-- All ioctls go here. -->
&sub-cec-ioc-adap-g-caps;
&sub-cec-ioc-adap-g-log-addrs;
&sub-cec-ioc-adap-g-phys-addr;
&sub-cec-ioc-dqevent;
&sub-cec-ioc-g-mode;
&sub-cec-ioc-receive;
</appendix>

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@ -0,0 +1,64 @@
<refentry id="cec-func-close">
<refmeta>
<refentrytitle>cec close()</refentrytitle>
&manvol;
</refmeta>
<refnamediv>
<refname>cec-close</refname>
<refpurpose>Close a cec device</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcsynopsisinfo>#include &lt;unistd.h&gt;</funcsynopsisinfo>
<funcprototype>
<funcdef>int <function>close</function></funcdef>
<paramdef>int <parameter>fd</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Arguments</title>
<variablelist>
<varlistentry>
<term><parameter>fd</parameter></term>
<listitem>
<para>&fd;</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Description</title>
<para>
Note: this documents the proposed CEC API. This API is not yet finalized and
is currently only available as a staging kernel module.
</para>
<para>Closes the cec device. Resources associated with the file descriptor
are freed. The device configuration remain unchanged.</para>
</refsect1>
<refsect1>
<title>Return Value</title>
<para><function>close</function> returns 0 on success. On error, -1 is
returned, and <varname>errno</varname> is set appropriately. Possible error
codes are:</para>
<variablelist>
<varlistentry>
<term><errorcode>EBADF</errorcode></term>
<listitem>
<para><parameter>fd</parameter> is not a valid open file descriptor.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
</refentry>

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@ -0,0 +1,78 @@
<refentry id="cec-func-ioctl">
<refmeta>
<refentrytitle>cec ioctl()</refentrytitle>
&manvol;
</refmeta>
<refnamediv>
<refname>cec-ioctl</refname>
<refpurpose>Control a cec device</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcsynopsisinfo>#include &lt;sys/ioctl.h&gt;</funcsynopsisinfo>
<funcprototype>
<funcdef>int <function>ioctl</function></funcdef>
<paramdef>int <parameter>fd</parameter></paramdef>
<paramdef>int <parameter>request</parameter></paramdef>
<paramdef>void *<parameter>argp</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Arguments</title>
<variablelist>
<varlistentry>
<term><parameter>fd</parameter></term>
<listitem>
<para>&fd;</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>request</parameter></term>
<listitem>
<para>CEC ioctl request code as defined in the cec.h header file,
for example CEC_ADAP_G_CAPS.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>argp</parameter></term>
<listitem>
<para>Pointer to a request-specific structure.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Description</title>
<para>
Note: this documents the proposed CEC API. This API is not yet finalized and
is currently only available as a staging kernel module.
</para>
<para>The <function>ioctl()</function> function manipulates cec device
parameters. The argument <parameter>fd</parameter> must be an open file
descriptor.</para>
<para>The ioctl <parameter>request</parameter> code specifies the cec
function to be called. It has encoded in it whether the argument is an
input, output or read/write parameter, and the size of the argument
<parameter>argp</parameter> in bytes.</para>
<para>Macros and structures definitions specifying cec ioctl requests and
their parameters are located in the cec.h header file. All cec ioctl
requests, their respective function and parameters are specified in
<xref linkend="cec-user-func" />.</para>
</refsect1>
<refsect1>
&return-value;
<para>Request-specific error codes are listed in the
individual requests descriptions.</para>
<para>When an ioctl that takes an output or read/write parameter fails,
the parameter remains unmodified.</para>
</refsect1>
</refentry>

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@ -0,0 +1,104 @@
<refentry id="cec-func-open">
<refmeta>
<refentrytitle>cec open()</refentrytitle>
&manvol;
</refmeta>
<refnamediv>
<refname>cec-open</refname>
<refpurpose>Open a cec device</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcsynopsisinfo>#include &lt;fcntl.h&gt;</funcsynopsisinfo>
<funcprototype>
<funcdef>int <function>open</function></funcdef>
<paramdef>const char *<parameter>device_name</parameter></paramdef>
<paramdef>int <parameter>flags</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Arguments</title>
<variablelist>
<varlistentry>
<term><parameter>device_name</parameter></term>
<listitem>
<para>Device to be opened.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>flags</parameter></term>
<listitem>
<para>Open flags. Access mode must be <constant>O_RDWR</constant>.
</para>
<para>When the <constant>O_NONBLOCK</constant> flag is
given, the &CEC-RECEIVE; ioctl will return &EAGAIN; when no message is
available, and the &CEC-TRANSMIT;, &CEC-ADAP-S-PHYS-ADDR; and
&CEC-ADAP-S-LOG-ADDRS; ioctls all act in non-blocking mode.</para>
<para>Other flags have no effect.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Description</title>
<para>
Note: this documents the proposed CEC API. This API is not yet finalized and
is currently only available as a staging kernel module.
</para>
<para>To open a cec device applications call <function>open()</function>
with the desired device name. The function has no side effects; the device
configuration remain unchanged.</para>
<para>When the device is opened in read-only mode, attempts to modify its
configuration will result in an error, and <varname>errno</varname> will be
set to <errorcode>EBADF</errorcode>.</para>
</refsect1>
<refsect1>
<title>Return Value</title>
<para><function>open</function> returns the new file descriptor on success.
On error, -1 is returned, and <varname>errno</varname> is set appropriately.
Possible error codes include:</para>
<variablelist>
<varlistentry>
<term><errorcode>EACCES</errorcode></term>
<listitem>
<para>The requested access to the file is not allowed.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><errorcode>EMFILE</errorcode></term>
<listitem>
<para>The process already has the maximum number of files open.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><errorcode>ENFILE</errorcode></term>
<listitem>
<para>The system limit on the total number of open files has been
reached.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><errorcode>ENOMEM</errorcode></term>
<listitem>
<para>Insufficient kernel memory was available.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><errorcode>ENXIO</errorcode></term>
<listitem>
<para>No device corresponding to this device special file exists.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
</refentry>

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@ -0,0 +1,94 @@
<refentry id="cec-func-poll">
<refmeta>
<refentrytitle>cec poll()</refentrytitle>
&manvol;
</refmeta>
<refnamediv>
<refname>cec-poll</refname>
<refpurpose>Wait for some event on a file descriptor</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcsynopsisinfo>#include &lt;sys/poll.h&gt;</funcsynopsisinfo>
<funcprototype>
<funcdef>int <function>poll</function></funcdef>
<paramdef>struct pollfd *<parameter>ufds</parameter></paramdef>
<paramdef>unsigned int <parameter>nfds</parameter></paramdef>
<paramdef>int <parameter>timeout</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>
Note: this documents the proposed CEC API. This API is not yet finalized and
is currently only available as a staging kernel module.
</para>
<para>With the <function>poll()</function> function applications
can wait for CEC events.</para>
<para>On success <function>poll()</function> returns the number of
file descriptors that have been selected (that is, file descriptors
for which the <structfield>revents</structfield> field of the
respective <structname>pollfd</structname> structure is non-zero).
CEC devices set the <constant>POLLIN</constant> and
<constant>POLLRDNORM</constant> flags in the
<structfield>revents</structfield> field if there are messages in the
receive queue. If the transmit queue has room for new messages, the
<constant>POLLOUT</constant> and <constant>POLLWRNORM</constant>
flags are set. If there are events in the event queue, then the
<constant>POLLPRI</constant> flag is set.
When the function timed out it returns a value of zero, on
failure it returns <returnvalue>-1</returnvalue> and the
<varname>errno</varname> variable is set appropriately.
</para>
<para>For more details see the
<function>poll()</function> manual page.</para>
</refsect1>
<refsect1>
<title>Return Value</title>
<para>On success, <function>poll()</function> returns the number
structures which have non-zero <structfield>revents</structfield>
fields, or zero if the call timed out. On error
<returnvalue>-1</returnvalue> is returned, and the
<varname>errno</varname> variable is set appropriately:</para>
<variablelist>
<varlistentry>
<term><errorcode>EBADF</errorcode></term>
<listitem>
<para>One or more of the <parameter>ufds</parameter> members
specify an invalid file descriptor.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><errorcode>EFAULT</errorcode></term>
<listitem>
<para><parameter>ufds</parameter> references an inaccessible
memory area.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><errorcode>EINTR</errorcode></term>
<listitem>
<para>The call was interrupted by a signal.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><errorcode>EINVAL</errorcode></term>
<listitem>
<para>The <parameter>nfds</parameter> argument is greater
than <constant>OPEN_MAX</constant>.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
</refentry>

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<refentry id="cec-ioc-adap-g-caps">
<refmeta>
<refentrytitle>ioctl CEC_ADAP_G_CAPS</refentrytitle>
&manvol;
</refmeta>
<refnamediv>
<refname>CEC_ADAP_G_CAPS</refname>
<refpurpose>Query device capabilities</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcprototype>
<funcdef>int <function>ioctl</function></funcdef>
<paramdef>int <parameter>fd</parameter></paramdef>
<paramdef>int <parameter>request</parameter></paramdef>
<paramdef>struct cec_caps *<parameter>argp</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Arguments</title>
<variablelist>
<varlistentry>
<term><parameter>fd</parameter></term>
<listitem>
<para>File descriptor returned by
<link linkend='cec-func-open'><function>open()</function></link>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>request</parameter></term>
<listitem>
<para>CEC_ADAP_G_CAPS</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>argp</parameter></term>
<listitem>
<para></para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Description</title>
<para>
Note: this documents the proposed CEC API. This API is not yet finalized and
is currently only available as a staging kernel module.
</para>
<para>All cec devices must support the <constant>CEC_ADAP_G_CAPS</constant>
ioctl. To query device information, applications call the ioctl with a
pointer to a &cec-caps;. The driver fills the structure and returns
the information to the application.
The ioctl never fails.</para>
<table pgwide="1" frame="none" id="cec-caps">
<title>struct <structname>cec_caps</structname></title>
<tgroup cols="3">
&cs-str;
<tbody valign="top">
<row>
<entry>char</entry>
<entry><structfield>driver[32]</structfield></entry>
<entry>The name of the cec adapter driver.</entry>
</row>
<row>
<entry>char</entry>
<entry><structfield>name[32]</structfield></entry>
<entry>The name of this CEC adapter. The combination <structfield>driver</structfield>
and <structfield>name</structfield> must be unique.</entry>
</row>
<row>
<entry>__u32</entry>
<entry><structfield>capabilities</structfield></entry>
<entry>The capabilities of the CEC adapter, see <xref
linkend="cec-capabilities" />.</entry>
</row>
<row>
<entry>__u32</entry>
<entry><structfield>version</structfield></entry>
<entry>CEC Framework API version, formatted with the
<constant>KERNEL_VERSION()</constant> macro.</entry>
</row>
</tbody>
</tgroup>
</table>
<table pgwide="1" frame="none" id="cec-capabilities">
<title>CEC Capabilities Flags</title>
<tgroup cols="3">
&cs-def;
<tbody valign="top">
<row>
<entry><constant>CEC_CAP_PHYS_ADDR</constant></entry>
<entry>0x00000001</entry>
<entry>Userspace has to configure the physical address by
calling &CEC-ADAP-S-PHYS-ADDR;. If this capability isn't set,
then setting the physical address is handled by the kernel
whenever the EDID is set (for an HDMI receiver) or read (for
an HDMI transmitter).</entry>
</row>
<row>
<entry><constant>CEC_CAP_LOG_ADDRS</constant></entry>
<entry>0x00000002</entry>
<entry>Userspace has to configure the logical addresses by
calling &CEC-ADAP-S-LOG-ADDRS;. If this capability isn't set,
then the kernel will have configured this.</entry>
</row>
<row>
<entry><constant>CEC_CAP_TRANSMIT</constant></entry>
<entry>0x00000004</entry>
<entry>Userspace can transmit CEC messages by calling &CEC-TRANSMIT;. This
implies that userspace can be a follower as well, since being able to
transmit messages is a prerequisite of becoming a follower. If this
capability isn't set, then the kernel will handle all CEC transmits
and process all CEC messages it receives.
</entry>
</row>
<row>
<entry><constant>CEC_CAP_PASSTHROUGH</constant></entry>
<entry>0x00000008</entry>
<entry>Userspace can use the passthrough mode by
calling &CEC-S-MODE;.</entry>
</row>
<row>
<entry><constant>CEC_CAP_RC</constant></entry>
<entry>0x00000010</entry>
<entry>This adapter supports the remote control protocol.</entry>
</row>
<row>
<entry><constant>CEC_CAP_MONITOR_ALL</constant></entry>
<entry>0x00000020</entry>
<entry>The CEC hardware can monitor all messages, not just directed and
broadcast messages.</entry>
</row>
</tbody>
</tgroup>
</table>
</refsect1>
<refsect1>
&return-value;
</refsect1>
</refentry>

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<refentry id="cec-ioc-adap-g-log-addrs">
<refmeta>
<refentrytitle>ioctl CEC_ADAP_G_LOG_ADDRS, CEC_ADAP_S_LOG_ADDRS</refentrytitle>
&manvol;
</refmeta>
<refnamediv>
<refname>CEC_ADAP_G_LOG_ADDRS</refname>
<refname>CEC_ADAP_S_LOG_ADDRS</refname>
<refpurpose>Get or set the logical addresses</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcprototype>
<funcdef>int <function>ioctl</function></funcdef>
<paramdef>int <parameter>fd</parameter></paramdef>
<paramdef>int <parameter>request</parameter></paramdef>
<paramdef>struct cec_log_addrs *<parameter>argp</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Arguments</title>
<variablelist>
<varlistentry>
<term><parameter>fd</parameter></term>
<listitem>
<para>File descriptor returned by
<link linkend='cec-func-open'><function>open()</function></link>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>request</parameter></term>
<listitem>
<para>CEC_ADAP_G_LOG_ADDRS, CEC_ADAP_S_LOG_ADDRS</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>argp</parameter></term>
<listitem>
<para></para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Description</title>
<para>
Note: this documents the proposed CEC API. This API is not yet finalized and
is currently only available as a staging kernel module.
</para>
<para>To query the current CEC logical addresses, applications call the
<constant>CEC_ADAP_G_LOG_ADDRS</constant> ioctl with a pointer to a
<structname>cec_log_addrs</structname> structure where the drivers stores the
logical addresses.</para>
<para>To set new logical addresses, applications fill in struct <structname>cec_log_addrs</structname>
and call the <constant>CEC_ADAP_S_LOG_ADDRS</constant> ioctl with a pointer to this struct.
The <constant>CEC_ADAP_S_LOG_ADDRS</constant> ioctl is only available if
<constant>CEC_CAP_LOG_ADDRS</constant> is set (&ENOTTY; is returned otherwise). This ioctl will block until all
requested logical addresses have been claimed. <constant>CEC_ADAP_S_LOG_ADDRS</constant>
can only be called by a file handle in initiator mode (see &CEC-S-MODE;).</para>
<table pgwide="1" frame="none" id="cec-log-addrs">
<title>struct <structname>cec_log_addrs</structname></title>
<tgroup cols="3">
&cs-str;
<tbody valign="top">
<row>
<entry>__u8</entry>
<entry><structfield>log_addr</structfield>[CEC_MAX_LOG_ADDRS]</entry>
<entry>The actual logical addresses that were claimed. This is set by the
driver. If no logical address could be claimed, then it is set to
<constant>CEC_LOG_ADDR_INVALID</constant>. If this adapter is Unregistered,
then <structfield>log_addr[0]</structfield> is set to 0xf and all others to
<constant>CEC_LOG_ADDR_INVALID</constant>.</entry>
</row>
<row>
<entry>__u16</entry>
<entry><structfield>log_addr_mask</structfield></entry>
<entry>The bitmask of all logical addresses this adapter has claimed.
If this adapter is Unregistered then <structfield>log_addr_mask</structfield>
sets bit 15 and clears all other bits. If this adapter is not configured at all, then
<structfield>log_addr_mask</structfield> is set to 0. Set by the driver.</entry>
</row>
<row>
<entry>__u8</entry>
<entry><structfield>cec_version</structfield></entry>
<entry>The CEC version that this adapter shall use. See
<xref linkend="cec-versions" />.
Used to implement the <constant>CEC_MSG_CEC_VERSION</constant> and
<constant>CEC_MSG_REPORT_FEATURES</constant> messages. Note that
<constant>CEC_OP_CEC_VERSION_1_3A</constant> is not allowed
by the CEC framework.
</entry>
</row>
<row>
<entry>__u8</entry>
<entry><structfield>num_log_addrs</structfield></entry>
<entry>Number of logical addresses to set up. Must be &le;
<structfield>available_log_addrs</structfield> as returned by
&CEC-ADAP-G-CAPS;. All arrays in this structure are only filled up to
index <structfield>available_log_addrs</structfield>-1. The remaining
array elements will be ignored. Note that the CEC 2.0 standard allows
for a maximum of 2 logical addresses, although some hardware has support
for more. <constant>CEC_MAX_LOG_ADDRS</constant> is 4. The driver will
return the actual number of logical addresses it could claim, which may
be less than what was requested. If this field is set to 0, then the
CEC adapter shall clear all claimed logical addresses and all other
fields will be ignored.</entry>
</row>
<row>
<entry>__u32</entry>
<entry><structfield>vendor_id</structfield></entry>
<entry>The vendor ID is a 24-bit number that identifies the specific
vendor or entity. Based on this ID vendor specific commands may be
defined. If you do not want a vendor ID then set it to
<constant>CEC_VENDOR_ID_NONE</constant>.</entry>
</row>
<row>
<entry>__u32</entry>
<entry><structfield>flags</structfield></entry>
<entry>Flags. No flags are defined yet, so set this to 0.</entry>
</row>
<row>
<entry>char</entry>
<entry><structfield>osd_name</structfield>[15]</entry>
<entry>The On-Screen Display name as is returned by the
<constant>CEC_MSG_SET_OSD_NAME</constant> message.</entry>
</row>
<row>
<entry>__u8</entry>
<entry><structfield>primary_device_type</structfield>[CEC_MAX_LOG_ADDRS]</entry>
<entry>Primary device type for each logical address. See
<xref linkend="cec-prim-dev-types" /> for possible types.</entry>
</row>
<row>
<entry>__u8</entry>
<entry><structfield>log_addr_type</structfield>[CEC_MAX_LOG_ADDRS]</entry>
<entry>Logical address types. See <xref linkend="cec-log-addr-types" /> for
possible types. The driver will update this with the actual logical address
type that it claimed (e.g. it may have to fallback to
<constant>CEC_LOG_ADDR_TYPE_UNREGISTERED</constant>).</entry>
</row>
<row>
<entry>__u8</entry>
<entry><structfield>all_device_types</structfield>[CEC_MAX_LOG_ADDRS]</entry>
<entry>CEC 2.0 specific: all device types. See <xref linkend="cec-all-dev-types-flags" />.
Used to implement the <constant>CEC_MSG_REPORT_FEATURES</constant> message.
This field is ignored if <structfield>cec_version</structfield> &lt;
<constant>CEC_OP_CEC_VERSION_2_0</constant>.</entry>
</row>
<row>
<entry>__u8</entry>
<entry><structfield>features</structfield>[CEC_MAX_LOG_ADDRS][12]</entry>
<entry>Features for each logical address. Used to implement the
<constant>CEC_MSG_REPORT_FEATURES</constant> message. The 12 bytes include
both the RC Profile and the Device Features.
This field is ignored if <structfield>cec_version</structfield> &lt;
<constant>CEC_OP_CEC_VERSION_2_0</constant>.</entry>
</row>
</tbody>
</tgroup>
</table>
<table pgwide="1" frame="none" id="cec-versions">
<title>CEC Versions</title>
<tgroup cols="3">
&cs-def;
<tbody valign="top">
<row>
<entry><constant>CEC_OP_CEC_VERSION_1_3A</constant></entry>
<entry>4</entry>
<entry>CEC version according to the HDMI 1.3a standard.</entry>
</row>
<row>
<entry><constant>CEC_OP_CEC_VERSION_1_4B</constant></entry>
<entry>5</entry>
<entry>CEC version according to the HDMI 1.4b standard.</entry>
</row>
<row>
<entry><constant>CEC_OP_CEC_VERSION_2_0</constant></entry>
<entry>6</entry>
<entry>CEC version according to the HDMI 2.0 standard.</entry>
</row>
</tbody>
</tgroup>
</table>
<table pgwide="1" frame="none" id="cec-prim-dev-types">
<title>CEC Primary Device Types</title>
<tgroup cols="3">
&cs-def;
<tbody valign="top">
<row>
<entry><constant>CEC_OP_PRIM_DEVTYPE_TV</constant></entry>
<entry>0</entry>
<entry>Use for a TV.</entry>
</row>
<row>
<entry><constant>CEC_OP_PRIM_DEVTYPE_RECORD</constant></entry>
<entry>1</entry>
<entry>Use for a recording device.</entry>
</row>
<row>
<entry><constant>CEC_OP_PRIM_DEVTYPE_TUNER</constant></entry>
<entry>3</entry>
<entry>Use for a device with a tuner.</entry>
</row>
<row>
<entry><constant>CEC_OP_PRIM_DEVTYPE_PLAYBACK</constant></entry>
<entry>4</entry>
<entry>Use for a playback device.</entry>
</row>
<row>
<entry><constant>CEC_OP_PRIM_DEVTYPE_AUDIOSYSTEM</constant></entry>
<entry>5</entry>
<entry>Use for an audio system (e.g. an audio/video receiver).</entry>
</row>
<row>
<entry><constant>CEC_OP_PRIM_DEVTYPE_SWITCH</constant></entry>
<entry>6</entry>
<entry>Use for a CEC switch.</entry>
</row>
<row>
<entry><constant>CEC_OP_PRIM_DEVTYPE_VIDEOPROC</constant></entry>
<entry>7</entry>
<entry>Use for a video processor device.</entry>
</row>
</tbody>
</tgroup>
</table>
<table pgwide="1" frame="none" id="cec-log-addr-types">
<title>CEC Logical Address Types</title>
<tgroup cols="3">
&cs-def;
<tbody valign="top">
<row>
<entry><constant>CEC_LOG_ADDR_TYPE_TV</constant></entry>
<entry>0</entry>
<entry>Use for a TV.</entry>
</row>
<row>
<entry><constant>CEC_LOG_ADDR_TYPE_RECORD</constant></entry>
<entry>1</entry>
<entry>Use for a recording device.</entry>
</row>
<row>
<entry><constant>CEC_LOG_ADDR_TYPE_TUNER</constant></entry>
<entry>2</entry>
<entry>Use for a tuner device.</entry>
</row>
<row>
<entry><constant>CEC_LOG_ADDR_TYPE_PLAYBACK</constant></entry>
<entry>3</entry>
<entry>Use for a playback device.</entry>
</row>
<row>
<entry><constant>CEC_LOG_ADDR_TYPE_AUDIOSYSTEM</constant></entry>
<entry>4</entry>
<entry>Use for an audio system device.</entry>
</row>
<row>
<entry><constant>CEC_LOG_ADDR_TYPE_SPECIFIC</constant></entry>
<entry>5</entry>
<entry>Use for a second TV or for a video processor device.</entry>
</row>
<row>
<entry><constant>CEC_LOG_ADDR_TYPE_UNREGISTERED</constant></entry>
<entry>6</entry>
<entry>Use this if you just want to remain unregistered.
Used for pure CEC switches or CDC-only devices (CDC:
Capability Discovery and Control).</entry>
</row>
</tbody>
</tgroup>
</table>
<table pgwide="1" frame="none" id="cec-all-dev-types-flags">
<title>CEC All Device Types Flags</title>
<tgroup cols="3">
&cs-def;
<tbody valign="top">
<row>
<entry><constant>CEC_OP_ALL_DEVTYPE_TV</constant></entry>
<entry>0x80</entry>
<entry>This supports the TV type.</entry>
</row>
<row>
<entry><constant>CEC_OP_ALL_DEVTYPE_RECORD</constant></entry>
<entry>0x40</entry>
<entry>This supports the Recording type.</entry>
</row>
<row>
<entry><constant>CEC_OP_ALL_DEVTYPE_TUNER</constant></entry>
<entry>0x20</entry>
<entry>This supports the Tuner type.</entry>
</row>
<row>
<entry><constant>CEC_OP_ALL_DEVTYPE_PLAYBACK</constant></entry>
<entry>0x10</entry>
<entry>This supports the Playback type.</entry>
</row>
<row>
<entry><constant>CEC_OP_ALL_DEVTYPE_AUDIOSYSTEM</constant></entry>
<entry>0x08</entry>
<entry>This supports the Audio System type.</entry>
</row>
<row>
<entry><constant>CEC_OP_ALL_DEVTYPE_SWITCH</constant></entry>
<entry>0x04</entry>
<entry>This supports the CEC Switch or Video Processing type.</entry>
</row>
</tbody>
</tgroup>
</table>
</refsect1>
<refsect1>
&return-value;
</refsect1>
</refentry>

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<refentry id="cec-ioc-adap-g-phys-addr">
<refmeta>
<refentrytitle>ioctl CEC_ADAP_G_PHYS_ADDR, CEC_ADAP_S_PHYS_ADDR</refentrytitle>
&manvol;
</refmeta>
<refnamediv>
<refname>CEC_ADAP_G_PHYS_ADDR</refname>
<refname>CEC_ADAP_S_PHYS_ADDR</refname>
<refpurpose>Get or set the physical address</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcprototype>
<funcdef>int <function>ioctl</function></funcdef>
<paramdef>int <parameter>fd</parameter></paramdef>
<paramdef>int <parameter>request</parameter></paramdef>
<paramdef>__u16 *<parameter>argp</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Arguments</title>
<variablelist>
<varlistentry>
<term><parameter>fd</parameter></term>
<listitem>
<para>File descriptor returned by
<link linkend='cec-func-open'><function>open()</function></link>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>request</parameter></term>
<listitem>
<para>CEC_ADAP_G_PHYS_ADDR, CEC_ADAP_S_PHYS_ADDR</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>argp</parameter></term>
<listitem>
<para></para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Description</title>
<para>
Note: this documents the proposed CEC API. This API is not yet finalized and
is currently only available as a staging kernel module.
</para>
<para>To query the current physical address applications call the
<constant>CEC_ADAP_G_PHYS_ADDR</constant> ioctl with a pointer to an __u16
where the driver stores the physical address.</para>
<para>To set a new physical address applications store the physical address in
an __u16 and call the <constant>CEC_ADAP_S_PHYS_ADDR</constant> ioctl with a
pointer to this integer. <constant>CEC_ADAP_S_PHYS_ADDR</constant> is only
available if <constant>CEC_CAP_PHYS_ADDR</constant> is set (&ENOTTY; will be returned
otherwise). <constant>CEC_ADAP_S_PHYS_ADDR</constant>
can only be called by a file handle in initiator mode (see &CEC-S-MODE;), if not
&EBUSY; will be returned.</para>
<para>The physical address is a 16-bit number where each group of 4 bits
represent a digit of the physical address a.b.c.d where the most significant
4 bits represent 'a'. The CEC root device (usually the TV) has address 0.0.0.0.
Every device that is hooked up to an input of the TV has address a.0.0.0 (where
'a' is &ge; 1), devices hooked up to those in turn have addresses a.b.0.0, etc.
So a topology of up to 5 devices deep is supported. The physical address a
device shall use is stored in the EDID of the sink.</para>
<para>For example, the EDID for each HDMI input of the TV will have a different
physical address of the form a.0.0.0 that the sources will read out and use as
their physical address.</para>
</refsect1>
<refsect1>
&return-value;
</refsect1>
</refentry>

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<refentry id="cec-ioc-g-event">
<refmeta>
<refentrytitle>ioctl CEC_DQEVENT</refentrytitle>
&manvol;
</refmeta>
<refnamediv>
<refname>CEC_DQEVENT</refname>
<refpurpose>Dequeue a CEC event</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcprototype>
<funcdef>int <function>ioctl</function></funcdef>
<paramdef>int <parameter>fd</parameter></paramdef>
<paramdef>int <parameter>request</parameter></paramdef>
<paramdef>struct cec_event *<parameter>argp</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Arguments</title>
<variablelist>
<varlistentry>
<term><parameter>fd</parameter></term>
<listitem>
<para>File descriptor returned by
<link linkend='cec-func-open'><function>open()</function></link>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>request</parameter></term>
<listitem>
<para>CEC_DQEVENT</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>argp</parameter></term>
<listitem>
<para></para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Description</title>
<para>
Note: this documents the proposed CEC API. This API is not yet finalized and
is currently only available as a staging kernel module.
</para>
<para>CEC devices can send asynchronous events. These can be retrieved by calling
the <constant>CEC_DQEVENT</constant> ioctl. If the file descriptor is in non-blocking
mode and no event is pending, then it will return -1 and set errno to the &EAGAIN;.</para>
<para>The internal event queues are per-filehandle and per-event type. If there is
no more room in a queue then the last event is overwritten with the new one. This
means that intermediate results can be thrown away but that the latest event is always
available. This also means that is it possible to read two successive events that have
the same value (e.g. two CEC_EVENT_STATE_CHANGE events with the same state). In that
case the intermediate state changes were lost but it is guaranteed that the state
did change in between the two events.</para>
<table pgwide="1" frame="none" id="cec-event-state-change">
<title>struct <structname>cec_event_state_change</structname></title>
<tgroup cols="3">
&cs-str;
<tbody valign="top">
<row>
<entry>__u16</entry>
<entry><structfield>phys_addr</structfield></entry>
<entry>The current physical address.</entry>
</row>
<row>
<entry>__u16</entry>
<entry><structfield>log_addr_mask</structfield></entry>
<entry>The current set of claimed logical addresses.</entry>
</row>
</tbody>
</tgroup>
</table>
<table pgwide="1" frame="none" id="cec-event-lost-msgs">
<title>struct <structname>cec_event_lost_msgs</structname></title>
<tgroup cols="3">
&cs-str;
<tbody valign="top">
<row>
<entry>__u32</entry>
<entry><structfield>lost_msgs</structfield></entry>
<entry>Set to the number of lost messages since the filehandle
was opened or since the last time this event was dequeued for
this filehandle. The messages lost are the oldest messages. So
when a new message arrives and there is no more room, then the
oldest message is discarded to make room for the new one. The
internal size of the message queue guarantees that all messages
received in the last two seconds will be stored. Since messages
should be replied to within a second according to the CEC
specification, this is more than enough.
</entry>
</row>
</tbody>
</tgroup>
</table>
<table pgwide="1" frame="none" id="cec-event">
<title>struct <structname>cec_event</structname></title>
<tgroup cols="4">
&cs-str;
<tbody valign="top">
<row>
<entry>__u64</entry>
<entry><structfield>ts</structfield></entry>
<entry>Timestamp of the event in ns.</entry>
<entry></entry>
</row>
<row>
<entry>__u32</entry>
<entry><structfield>event</structfield></entry>
<entry>The CEC event type, see <xref linkend="cec-events" />.</entry>
<entry></entry>
</row>
<row>
<entry>__u32</entry>
<entry><structfield>flags</structfield></entry>
<entry>Event flags, see <xref linkend="cec-event-flags" />.</entry>
<entry></entry>
</row>
<row>
<entry>union</entry>
<entry>(anonymous)</entry>
<entry></entry>
<entry></entry>
</row>
<row>
<entry></entry>
<entry>struct cec_event_state_change</entry>
<entry><structfield>state_change</structfield></entry>
<entry>The new adapter state as sent by the <constant>CEC_EVENT_STATE_CHANGE</constant>
event.</entry>
</row>
<row>
<entry></entry>
<entry>struct cec_event_lost_msgs</entry>
<entry><structfield>lost_msgs</structfield></entry>
<entry>The number of lost messages as sent by the <constant>CEC_EVENT_LOST_MSGS</constant>
event.</entry>
</row>
</tbody>
</tgroup>
</table>
<table pgwide="1" frame="none" id="cec-events">
<title>CEC Events Types</title>
<tgroup cols="3">
&cs-def;
<tbody valign="top">
<row>
<entry><constant>CEC_EVENT_STATE_CHANGE</constant></entry>
<entry>1</entry>
<entry>Generated when the CEC Adapter's state changes. When open() is
called an initial event will be generated for that filehandle with the
CEC Adapter's state at that time.
</entry>
</row>
<row>
<entry><constant>CEC_EVENT_LOST_MSGS</constant></entry>
<entry>2</entry>
<entry>Generated if one or more CEC messages were lost because the
application didn't dequeue CEC messages fast enough.</entry>
</row>
</tbody>
</tgroup>
</table>
<table pgwide="1" frame="none" id="cec-event-flags">
<title>CEC Event Flags</title>
<tgroup cols="3">
&cs-def;
<tbody valign="top">
<row>
<entry><constant>CEC_EVENT_FL_INITIAL_VALUE</constant></entry>
<entry>1</entry>
<entry>Set for the initial events that are generated when the device is
opened. See the table above for which events do this. This allows
applications to learn the initial state of the CEC adapter at open()
time.</entry>
</row>
</tbody>
</tgroup>
</table>
</refsect1>
<refsect1>
&return-value;
</refsect1>
</refentry>

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<refentry id="cec-ioc-g-mode">
<refmeta>
<refentrytitle>ioctl CEC_G_MODE, CEC_S_MODE</refentrytitle>
&manvol;
</refmeta>
<refnamediv>
<refname>CEC_G_MODE</refname>
<refname>CEC_S_MODE</refname>
<refpurpose>Get or set exclusive use of the CEC adapter</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcprototype>
<funcdef>int <function>ioctl</function></funcdef>
<paramdef>int <parameter>fd</parameter></paramdef>
<paramdef>int <parameter>request</parameter></paramdef>
<paramdef>__u32 *<parameter>argp</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Arguments</title>
<variablelist>
<varlistentry>
<term><parameter>fd</parameter></term>
<listitem>
<para>File descriptor returned by
<link linkend='cec-func-open'><function>open()</function></link>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>request</parameter></term>
<listitem>
<para>CEC_G_MODE, CEC_S_MODE</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>argp</parameter></term>
<listitem>
<para></para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Description</title>
<para>
Note: this documents the proposed CEC API. This API is not yet finalized and
is currently only available as a staging kernel module.
</para>
<para>By default any filehandle can use &CEC-TRANSMIT; and &CEC-RECEIVE;, but
in order to prevent applications from stepping on each others toes it must be possible
to obtain exclusive access to the CEC adapter. This ioctl sets the filehandle
to initiator and/or follower mode which can be exclusive depending on the chosen
mode. The initiator is the filehandle that is used
to initiate messages, i.e. it commands other CEC devices. The follower is the filehandle
that receives messages sent to the CEC adapter and processes them. The same filehandle
can be both initiator and follower, or this role can be taken by two different
filehandles.</para>
<para>When a CEC message is received, then the CEC framework will decide how
it will be processed. If the message is a reply to an earlier transmitted message,
then the reply is sent back to the filehandle that is waiting for it. In addition
the CEC framework will process it.</para>
<para>If the message is not a reply, then the CEC framework will process it
first. If there is no follower, then the message is just discarded and a feature
abort is sent back to the initiator if the framework couldn't process it. If there
is a follower, then the message is passed on to the follower who will use
&CEC-RECEIVE; to dequeue the new message. The framework expects the follower to
make the right decisions.</para>
<para>The CEC framework will process core messages unless requested otherwise
by the follower. The follower can enable the passthrough mode. In that case, the
CEC framework will pass on most core messages without processing them and
the follower will have to implement those messages. There are some messages
that the core will always process, regardless of the passthrough mode. See
<xref linkend="cec-core-processing" /> for details.</para>
<para>If there is no initiator, then any CEC filehandle can use &CEC-TRANSMIT;.
If there is an exclusive initiator then only that initiator can call &CEC-TRANSMIT;.
The follower can of course always call &CEC-TRANSMIT;.</para>
<para>Available initiator modes are:</para>
<table pgwide="1" frame="none" id="cec-mode-initiator">
<title>Initiator Modes</title>
<tgroup cols="3">
&cs-def;
<tbody valign="top">
<row>
<entry><constant>CEC_MODE_NO_INITIATOR</constant></entry>
<entry>0x0</entry>
<entry>This is not an initiator, i.e. it cannot transmit CEC messages
or make any other changes to the CEC adapter.</entry>
</row>
<row>
<entry><constant>CEC_MODE_INITIATOR</constant></entry>
<entry>0x1</entry>
<entry>This is an initiator (the default when the device is opened) and it
can transmit CEC messages and make changes to the CEC adapter, unless there
is an exclusive initiator.</entry>
</row>
<row>
<entry><constant>CEC_MODE_EXCL_INITIATOR</constant></entry>
<entry>0x2</entry>
<entry>This is an exclusive initiator and this file descriptor is the only one
that can transmit CEC messages and make changes to the CEC adapter. If someone
else is already the exclusive initiator then an attempt to become one will return
the &EBUSY; error.</entry>
</row>
</tbody>
</tgroup>
</table>
<para>Available follower modes are:</para>
<table pgwide="1" frame="none" id="cec-mode-follower">
<title>Follower Modes</title>
<tgroup cols="3">
&cs-def;
<tbody valign="top">
<row>
<entry><constant>CEC_MODE_NO_FOLLOWER</constant></entry>
<entry>0x00</entry>
<entry>This is not a follower (the default when the device is opened).</entry>
</row>
<row>
<entry><constant>CEC_MODE_FOLLOWER</constant></entry>
<entry>0x10</entry>
<entry>This is a follower and it will receive CEC messages unless there is
an exclusive follower. You cannot become a follower if <constant>CEC_CAP_TRANSMIT</constant>
is not set or if <constant>CEC_MODE_NO_INITIATOR</constant> was specified,
&EINVAL; is returned in that case.</entry>
</row>
<row>
<entry><constant>CEC_MODE_EXCL_FOLLOWER</constant></entry>
<entry>0x20</entry>
<entry>This is an exclusive follower and only this file descriptor will receive
CEC messages for processing. If someone else is already the exclusive follower
then an attempt to become one will return the &EBUSY; error. You cannot become
a follower if <constant>CEC_CAP_TRANSMIT</constant> is not set or if
<constant>CEC_MODE_NO_INITIATOR</constant> was specified, &EINVAL; is returned
in that case.</entry>
</row>
<row>
<entry><constant>CEC_MODE_EXCL_FOLLOWER_PASSTHRU</constant></entry>
<entry>0x30</entry>
<entry>This is an exclusive follower and only this file descriptor will receive
CEC messages for processing. In addition it will put the CEC device into
passthrough mode, allowing the exclusive follower to handle most core messages
instead of relying on the CEC framework for that. If someone else is already the
exclusive follower then an attempt to become one will return the &EBUSY; error.
You cannot become a follower if <constant>CEC_CAP_TRANSMIT</constant>
is not set or if <constant>CEC_MODE_NO_INITIATOR</constant> was specified,
&EINVAL; is returned in that case.</entry>
</row>
<row>
<entry><constant>CEC_MODE_MONITOR</constant></entry>
<entry>0xe0</entry>
<entry>Put the file descriptor into monitor mode. Can only be used in combination
with <constant>CEC_MODE_NO_INITIATOR</constant>, otherwise &EINVAL; will be
returned. In monitor mode all messages this CEC device transmits and all messages
it receives (both broadcast messages and directed messages for one its logical
addresses) will be reported. This is very useful for debugging. This is only
allowed if the process has the <constant>CAP_NET_ADMIN</constant>
capability. If that is not set, then &EPERM; is returned.</entry>
</row>
<row>
<entry><constant>CEC_MODE_MONITOR_ALL</constant></entry>
<entry>0xf0</entry>
<entry>Put the file descriptor into 'monitor all' mode. Can only be used in combination
with <constant>CEC_MODE_NO_INITIATOR</constant>, otherwise &EINVAL; will be
returned. In 'monitor all' mode all messages this CEC device transmits and all messages
it receives, including directed messages for other CEC devices will be reported. This
is very useful for debugging, but not all devices support this. This mode requires that
the <constant>CEC_CAP_MONITOR_ALL</constant> capability is set, otherwise &EINVAL; is
returned. This is only allowed if the process has the <constant>CAP_NET_ADMIN</constant>
capability. If that is not set, then &EPERM; is returned.</entry>
</row>
</tbody>
</tgroup>
</table>
<para>Core message processing details:</para>
<table pgwide="1" frame="none" id="cec-core-processing">
<title>Core Message Processing</title>
<tgroup cols="2">
&cs-def;
<tbody valign="top">
<row>
<entry><constant>CEC_MSG_GET_CEC_VERSION</constant></entry>
<entry>When in passthrough mode this message has to be handled by userspace,
otherwise the core will return the CEC version that was set with &CEC-ADAP-S-LOG-ADDRS;.</entry>
</row>
<row>
<entry><constant>CEC_MSG_GIVE_DEVICE_VENDOR_ID</constant></entry>
<entry>When in passthrough mode this message has to be handled by userspace,
otherwise the core will return the vendor ID that was set with &CEC-ADAP-S-LOG-ADDRS;.</entry>
</row>
<row>
<entry><constant>CEC_MSG_ABORT</constant></entry>
<entry>When in passthrough mode this message has to be handled by userspace,
otherwise the core will return a feature refused message as per the specification.</entry>
</row>
<row>
<entry><constant>CEC_MSG_GIVE_PHYSICAL_ADDR</constant></entry>
<entry>When in passthrough mode this message has to be handled by userspace,
otherwise the core will report the current physical address.</entry>
</row>
<row>
<entry><constant>CEC_MSG_GIVE_OSD_NAME</constant></entry>
<entry>When in passthrough mode this message has to be handled by userspace,
otherwise the core will report the current OSD name as was set with
&CEC-ADAP-S-LOG-ADDRS;.</entry>
</row>
<row>
<entry><constant>CEC_MSG_GIVE_FEATURES</constant></entry>
<entry>When in passthrough mode this message has to be handled by userspace,
otherwise the core will report the current features as was set with
&CEC-ADAP-S-LOG-ADDRS; or the message is ignore if the CEC version was
older than 2.0.</entry>
</row>
<row>
<entry><constant>CEC_MSG_USER_CONTROL_PRESSED</constant></entry>
<entry>If <constant>CEC_CAP_RC</constant> is set, then generate a remote control
key press. This message is always passed on to userspace.</entry>
</row>
<row>
<entry><constant>CEC_MSG_USER_CONTROL_RELEASED</constant></entry>
<entry>If <constant>CEC_CAP_RC</constant> is set, then generate a remote control
key release. This message is always passed on to userspace.</entry>
</row>
<row>
<entry><constant>CEC_MSG_REPORT_PHYSICAL_ADDR</constant></entry>
<entry>The CEC framework will make note of the reported physical address
and then just pass the message on to userspace.</entry>
</row>
</tbody>
</tgroup>
</table>
</refsect1>
<refsect1>
&return-value;
</refsect1>
</refentry>

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@ -0,0 +1,274 @@
<refentry id="cec-ioc-receive">
<refmeta>
<refentrytitle>ioctl CEC_RECEIVE, CEC_TRANSMIT</refentrytitle>
&manvol;
</refmeta>
<refnamediv>
<refname>CEC_RECEIVE</refname>
<refname>CEC_TRANSMIT</refname>
<refpurpose>Receive or transmit a CEC message</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcprototype>
<funcdef>int <function>ioctl</function></funcdef>
<paramdef>int <parameter>fd</parameter></paramdef>
<paramdef>int <parameter>request</parameter></paramdef>
<paramdef>struct cec_msg *<parameter>argp</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Arguments</title>
<variablelist>
<varlistentry>
<term><parameter>fd</parameter></term>
<listitem>
<para>File descriptor returned by
<link linkend='cec-func-open'><function>open()</function></link>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>request</parameter></term>
<listitem>
<para>CEC_RECEIVE, CEC_TRANSMIT</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>argp</parameter></term>
<listitem>
<para></para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Description</title>
<para>
Note: this documents the proposed CEC API. This API is not yet finalized and
is currently only available as a staging kernel module.
</para>
<para>To receive a CEC message the application has to fill in the
<structname>cec_msg</structname> structure and pass it to the
<constant>CEC_RECEIVE</constant> ioctl. <constant>CEC_RECEIVE</constant> is
only available if <constant>CEC_CAP_RECEIVE</constant> is set. If the
file descriptor is in non-blocking mode and there are no received
messages pending, then it will return -1 and set errno to the &EAGAIN;.
If the file descriptor is in blocking mode and <structfield>timeout</structfield>
is non-zero and no message arrived within <structfield>timeout</structfield>
milliseconds, then it will return -1 and set errno to the &ETIMEDOUT;.</para>
<para>To send a CEC message the application has to fill in the
<structname>cec_msg</structname> structure and pass it to the
<constant>CEC_TRANSMIT</constant> ioctl. <constant>CEC_TRANSMIT</constant> is
only available if <constant>CEC_CAP_TRANSMIT</constant> is set.
If there is no more room in the transmit queue, then it will return
-1 and set errno to the &EBUSY;.</para>
<table pgwide="1" frame="none" id="cec-msg">
<title>struct <structname>cec_msg</structname></title>
<tgroup cols="3">
&cs-str;
<tbody valign="top">
<row>
<entry>__u64</entry>
<entry><structfield>ts</structfield></entry>
<entry>Timestamp of when the message was transmitted in ns in the case
of <constant>CEC_TRANSMIT</constant> with <structfield>reply</structfield>
set to 0, or the timestamp of the received message in all other cases.</entry>
</row>
<row>
<entry>__u32</entry>
<entry><structfield>len</structfield></entry>
<entry>The length of the message. For <constant>CEC_TRANSMIT</constant> this
is filled in by the application. The driver will fill this in for
<constant>CEC_RECEIVE</constant> and for <constant>CEC_TRANSMIT</constant>
it will be filled in with the length of the reply message if
<structfield>reply</structfield> was set.</entry>
</row>
<row>
<entry>__u32</entry>
<entry><structfield>timeout</structfield></entry>
<entry>The timeout in milliseconds. This is the time the device will wait for a message to
be received before timing out. If it is set to 0, then it will wait indefinitely when it
is called by <constant>CEC_RECEIVE</constant>. If it is 0 and it is called by
<constant>CEC_TRANSMIT</constant>, then it will be replaced by 1000 if the
<structfield>reply</structfield> is non-zero or ignored if <structfield>reply</structfield>
is 0.</entry>
</row>
<row>
<entry>__u32</entry>
<entry><structfield>sequence</structfield></entry>
<entry>The sequence number is automatically assigned by the CEC
framework for all transmitted messages. It can be later used by the
framework to generate an event if a reply for a message was
requested and the message was transmitted in a non-blocking mode.
</entry>
</row>
<row>
<entry>__u32</entry>
<entry><structfield>flags</structfield></entry>
<entry>Flags. No flags are defined yet, so set this to 0.</entry>
</row>
<row>
<entry>__u8</entry>
<entry><structfield>rx_status</structfield></entry>
<entry>The status bits of the received message. See <xref linkend="cec-rx-status" />
for the possible status values. It is 0 if this message was transmitted, not
received, unless this is the reply to a transmitted message. In that case both
<structfield>rx_status</structfield> and <structfield>tx_status</structfield>
are set.</entry>
</row>
<row>
<entry>__u8</entry>
<entry><structfield>tx_status</structfield></entry>
<entry>The status bits of the transmitted message. See <xref linkend="cec-tx-status" />
for the possible status values. It is 0 if this messages was received, not
transmitted.</entry>
</row>
<row>
<entry>__u8</entry>
<entry><structfield>msg</structfield>[16]</entry>
<entry>The message payload. For <constant>CEC_TRANSMIT</constant> this
is filled in by the application. The driver will fill this in for
<constant>CEC_RECEIVE</constant> and for <constant>CEC_TRANSMIT</constant>
it will be filled in with the payload of the reply message if
<structfield>reply</structfield> was set.</entry>
</row>
<row>
<entry>__u8</entry>
<entry><structfield>reply</structfield></entry>
<entry>Wait until this message is replied. If <structfield>reply</structfield>
is 0 and the <structfield>timeout</structfield> is 0, then don't wait for a reply but
return after transmitting the message. If there was an error as indicated by a non-zero
<structfield>tx_status</structfield> field, then <structfield>reply</structfield> and
<structfield>timeout</structfield> are both set to 0 by the driver. Ignored by
<constant>CEC_RECEIVE</constant>. The case where <structfield>reply</structfield> is 0
(this is the opcode for the Feature Abort message) and <structfield>timeout</structfield>
is non-zero is specifically allowed to send a message and wait up to <structfield>timeout</structfield>
milliseconds for a Feature Abort reply. In this case <structfield>rx_status</structfield>
will either be set to <constant>CEC_RX_STATUS_TIMEOUT</constant> or
<constant>CEC_RX_STATUS_FEATURE_ABORT</constant>.</entry>
</row>
<row>
<entry>__u8</entry>
<entry><structfield>tx_arb_lost_cnt</structfield></entry>
<entry>A counter of the number of transmit attempts that resulted in the
Arbitration Lost error. This is only set if the hardware supports this, otherwise
it is always 0. This counter is only valid if the <constant>CEC_TX_STATUS_ARB_LOST</constant>
status bit is set.</entry>
</row>
<row>
<entry>__u8</entry>
<entry><structfield>tx_nack_cnt</structfield></entry>
<entry>A counter of the number of transmit attempts that resulted in the
Not Acknowledged error. This is only set if the hardware supports this, otherwise
it is always 0. This counter is only valid if the <constant>CEC_TX_STATUS_NACK</constant>
status bit is set.</entry>
</row>
<row>
<entry>__u8</entry>
<entry><structfield>tx_low_drive_cnt</structfield></entry>
<entry>A counter of the number of transmit attempts that resulted in the
Arbitration Lost error. This is only set if the hardware supports this, otherwise
it is always 0. This counter is only valid if the <constant>CEC_TX_STATUS_LOW_DRIVE</constant>
status bit is set.</entry>
</row>
<row>
<entry>__u8</entry>
<entry><structfield>tx_error_cnt</structfield></entry>
<entry>A counter of the number of transmit errors other than Arbitration Lost
or Not Acknowledged. This is only set if the hardware supports this, otherwise
it is always 0. This counter is only valid if the <constant>CEC_TX_STATUS_ERROR</constant>
status bit is set.</entry>
</row>
</tbody>
</tgroup>
</table>
<table pgwide="1" frame="none" id="cec-tx-status">
<title>CEC Transmit Status</title>
<tgroup cols="3">
&cs-def;
<tbody valign="top">
<row>
<entry><constant>CEC_TX_STATUS_OK</constant></entry>
<entry>0x01</entry>
<entry>The message was transmitted successfully. This is mutually exclusive with
<constant>CEC_TX_STATUS_MAX_RETRIES</constant>. Other bits can still be set if
earlier attempts met with failure before the transmit was eventually successful.</entry>
</row>
<row>
<entry><constant>CEC_TX_STATUS_ARB_LOST</constant></entry>
<entry>0x02</entry>
<entry>CEC line arbitration was lost.</entry>
</row>
<row>
<entry><constant>CEC_TX_STATUS_NACK</constant></entry>
<entry>0x04</entry>
<entry>Message was not acknowledged.</entry>
</row>
<row>
<entry><constant>CEC_TX_STATUS_LOW_DRIVE</constant></entry>
<entry>0x08</entry>
<entry>Low drive was detected on the CEC bus. This indicates that a follower
detected an error on the bus and requests a retransmission.</entry>
</row>
<row>
<entry><constant>CEC_TX_STATUS_ERROR</constant></entry>
<entry>0x10</entry>
<entry>Some error occurred. This is used for any errors that do not
fit the previous two, either because the hardware could not tell
which error occurred, or because the hardware tested for other conditions
besides those two.</entry>
</row>
<row>
<entry><constant>CEC_TX_STATUS_MAX_RETRIES</constant></entry>
<entry>0x20</entry>
<entry>The transmit failed after one or more retries. This status bit is mutually
exclusive with <constant>CEC_TX_STATUS_OK</constant>. Other bits can still be set
to explain which failures were seen.</entry>
</row>
</tbody>
</tgroup>
</table>
<table pgwide="1" frame="none" id="cec-rx-status">
<title>CEC Receive Status</title>
<tgroup cols="3">
&cs-def;
<tbody valign="top">
<row>
<entry><constant>CEC_RX_STATUS_OK</constant></entry>
<entry>0x01</entry>
<entry>The message was received successfully.</entry>
</row>
<row>
<entry><constant>CEC_RX_STATUS_TIMEOUT</constant></entry>
<entry>0x02</entry>
<entry>The reply to an earlier transmitted message timed out.</entry>
</row>
<row>
<entry><constant>CEC_RX_STATUS_FEATURE_ABORT</constant></entry>
<entry>0x04</entry>
<entry>The message was received successfully but the reply was
<constant>CEC_MSG_FEATURE_ABORT</constant>. This status is only
set if this message was the reply to an earlier transmitted
message.</entry>
</row>
</tbody>
</tgroup>
</table>
</refsect1>
<refsect1>
&return-value;
</refsect1>
</refentry>

6
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@ -75,7 +75,7 @@
</mediaobject>
</figure>
<para>The media infrastructure API was designed to control such
devices. It is divided into four parts.</para>
devices. It is divided into five parts.</para>
<para>The first part covers radio, video capture and output,
cameras, analog TV devices and codecs.</para>
<para>The second part covers the
@ -87,6 +87,7 @@
<xref linkend="fe-delivery-system-t" />.</para>
<para>The third part covers the Remote Controller API.</para>
<para>The fourth part covers the Media Controller API.</para>
<para>The fifth part covers the CEC (Consumer Electronics Control) API.</para>
<para>It should also be noted that a media device may also have audio
components, like mixers, PCM capture, PCM playback, etc, which
are controlled via ALSA API.</para>
@ -107,6 +108,9 @@
<part id="media_common">
&sub-media-controller;
</part>
<part id="cec">
&sub-cec-api;
</part>
<chapter id="gen_errors">
&sub-gen-errors;

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CEC Kernel Support
==================
The CEC framework provides a unified kernel interface for use with HDMI CEC
hardware. It is designed to handle a multiple types of hardware (receivers,
transmitters, USB dongles). The framework also gives the option to decide
what to do in the kernel driver and what should be handled by userspace
applications. In addition it integrates the remote control passthrough
feature into the kernel's remote control framework.
The CEC Protocol
----------------
The CEC protocol enables consumer electronic devices to communicate with each
other through the HDMI connection. The protocol uses logical addresses in the
communication. The logical address is strictly connected with the functionality
provided by the device. The TV acting as the communication hub is always
assigned address 0. The physical address is determined by the physical
connection between devices.
The CEC framework described here is up to date with the CEC 2.0 specification.
It is documented in the HDMI 1.4 specification with the new 2.0 bits documented
in the HDMI 2.0 specification. But for most of the features the freely available
HDMI 1.3a specification is sufficient:
http://www.microprocessor.org/HDMISpecification13a.pdf
The Kernel Interface
====================
CEC Adapter
-----------
The struct cec_adapter represents the CEC adapter hardware. It is created by
calling cec_allocate_adapter() and deleted by calling cec_delete_adapter():
struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops,
void *priv, const char *name, u32 caps, u8 available_las,
struct device *parent);
void cec_delete_adapter(struct cec_adapter *adap);
To create an adapter you need to pass the following information:
ops: adapter operations which are called by the CEC framework and that you
have to implement.
priv: will be stored in adap->priv and can be used by the adapter ops.
name: the name of the CEC adapter. Note: this name will be copied.
caps: capabilities of the CEC adapter. These capabilities determine the
capabilities of the hardware and which parts are to be handled
by userspace and which parts are handled by kernelspace. The
capabilities are returned by CEC_ADAP_G_CAPS.
available_las: the number of simultaneous logical addresses that this
adapter can handle. Must be 1 <= available_las <= CEC_MAX_LOG_ADDRS.
parent: the parent device.
To register the /dev/cecX device node and the remote control device (if
CEC_CAP_RC is set) you call:
int cec_register_adapter(struct cec_adapter *adap);
To unregister the devices call:
void cec_unregister_adapter(struct cec_adapter *adap);
Note: if cec_register_adapter() fails, then call cec_delete_adapter() to
clean up. But if cec_register_adapter() succeeded, then only call
cec_unregister_adapter() to clean up, never cec_delete_adapter(). The
unregister function will delete the adapter automatically once the last user
of that /dev/cecX device has closed its file handle.
Implementing the Low-Level CEC Adapter
--------------------------------------
The following low-level adapter operations have to be implemented in
your driver:
struct cec_adap_ops {
/* Low-level callbacks */
int (*adap_enable)(struct cec_adapter *adap, bool enable);
int (*adap_monitor_all_enable)(struct cec_adapter *adap, bool enable);
int (*adap_log_addr)(struct cec_adapter *adap, u8 logical_addr);
int (*adap_transmit)(struct cec_adapter *adap, u8 attempts,
u32 signal_free_time, struct cec_msg *msg);
void (*adap_log_status)(struct cec_adapter *adap);
/* High-level callbacks */
...
};
The three low-level ops deal with various aspects of controlling the CEC adapter
hardware:
To enable/disable the hardware:
int (*adap_enable)(struct cec_adapter *adap, bool enable);
This callback enables or disables the CEC hardware. Enabling the CEC hardware
means powering it up in a state where no logical addresses are claimed. This
op assumes that the physical address (adap->phys_addr) is valid when enable is
true and will not change while the CEC adapter remains enabled. The initial
state of the CEC adapter after calling cec_allocate_adapter() is disabled.
Note that adap_enable must return 0 if enable is false.
To enable/disable the 'monitor all' mode:
int (*adap_monitor_all_enable)(struct cec_adapter *adap, bool enable);
If enabled, then the adapter should be put in a mode to also monitor messages
that not for us. Not all hardware supports this and this function is only
called if the CEC_CAP_MONITOR_ALL capability is set. This callback is optional
(some hardware may always be in 'monitor all' mode).
Note that adap_monitor_all_enable must return 0 if enable is false.
To program a new logical address:
int (*adap_log_addr)(struct cec_adapter *adap, u8 logical_addr);
If logical_addr == CEC_LOG_ADDR_INVALID then all programmed logical addresses
are to be erased. Otherwise the given logical address should be programmed.
If the maximum number of available logical addresses is exceeded, then it
should return -ENXIO. Once a logical address is programmed the CEC hardware
can receive directed messages to that address.
Note that adap_log_addr must return 0 if logical_addr is CEC_LOG_ADDR_INVALID.
To transmit a new message:
int (*adap_transmit)(struct cec_adapter *adap, u8 attempts,
u32 signal_free_time, struct cec_msg *msg);
This transmits a new message. The attempts argument is the suggested number of
attempts for the transmit.
The signal_free_time is the number of data bit periods that the adapter should
wait when the line is free before attempting to send a message. This value
depends on whether this transmit is a retry, a message from a new initiator or
a new message for the same initiator. Most hardware will handle this
automatically, but in some cases this information is needed.
The CEC_FREE_TIME_TO_USEC macro can be used to convert signal_free_time to
microseconds (one data bit period is 2.4 ms).
To log the current CEC hardware status:
void (*adap_status)(struct cec_adapter *adap, struct seq_file *file);
This optional callback can be used to show the status of the CEC hardware.
The status is available through debugfs: cat /sys/kernel/debug/cec/cecX/status
Your adapter driver will also have to react to events (typically interrupt
driven) by calling into the framework in the following situations:
When a transmit finished (successfully or otherwise):
void cec_transmit_done(struct cec_adapter *adap, u8 status, u8 arb_lost_cnt,
u8 nack_cnt, u8 low_drive_cnt, u8 error_cnt);
The status can be one of:
CEC_TX_STATUS_OK: the transmit was successful.
CEC_TX_STATUS_ARB_LOST: arbitration was lost: another CEC initiator
took control of the CEC line and you lost the arbitration.
CEC_TX_STATUS_NACK: the message was nacked (for a directed message) or
acked (for a broadcast message). A retransmission is needed.
CEC_TX_STATUS_LOW_DRIVE: low drive was detected on the CEC bus. This
indicates that a follower detected an error on the bus and requested a
retransmission.
CEC_TX_STATUS_ERROR: some unspecified error occurred: this can be one of
the previous two if the hardware cannot differentiate or something else
entirely.
CEC_TX_STATUS_MAX_RETRIES: could not transmit the message after
trying multiple times. Should only be set by the driver if it has hardware
support for retrying messages. If set, then the framework assumes that it
doesn't have to make another attempt to transmit the message since the
hardware did that already.
The *_cnt arguments are the number of error conditions that were seen.
This may be 0 if no information is available. Drivers that do not support
hardware retry can just set the counter corresponding to the transmit error
to 1, if the hardware does support retry then either set these counters to
0 if the hardware provides no feedback of which errors occurred and how many
times, or fill in the correct values as reported by the hardware.
When a CEC message was received:
void cec_received_msg(struct cec_adapter *adap, struct cec_msg *msg);
Speaks for itself.
Implementing the High-Level CEC Adapter
---------------------------------------
The low-level operations drive the hardware, the high-level operations are
CEC protocol driven. The following high-level callbacks are available:
struct cec_adap_ops {
/* Low-level callbacks */
...
/* High-level CEC message callback */
int (*received)(struct cec_adapter *adap, struct cec_msg *msg);
};
The received() callback allows the driver to optionally handle a newly
received CEC message
int (*received)(struct cec_adapter *adap, struct cec_msg *msg);
If the driver wants to process a CEC message, then it can implement this
callback. If it doesn't want to handle this message, then it should return
-ENOMSG, otherwise the CEC framework assumes it processed this message and
it will not no anything with it.
CEC framework functions
-----------------------
CEC Adapter drivers can call the following CEC framework functions:
int cec_transmit_msg(struct cec_adapter *adap, struct cec_msg *msg,
bool block);
Transmit a CEC message. If block is true, then wait until the message has been
transmitted, otherwise just queue it and return.
void cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr, bool block);
Change the physical address. This function will set adap->phys_addr and
send an event if it has changed. If cec_s_log_addrs() has been called and
the physical address has become valid, then the CEC framework will start
claiming the logical addresses. If block is true, then this function won't
return until this process has finished.
When the physical address is set to a valid value the CEC adapter will
be enabled (see the adap_enable op). When it is set to CEC_PHYS_ADDR_INVALID,
then the CEC adapter will be disabled. If you change a valid physical address
to another valid physical address, then this function will first set the
address to CEC_PHYS_ADDR_INVALID before enabling the new physical address.
int cec_s_log_addrs(struct cec_adapter *adap,
struct cec_log_addrs *log_addrs, bool block);
Claim the CEC logical addresses. Should never be called if CEC_CAP_LOG_ADDRS
is set. If block is true, then wait until the logical addresses have been
claimed, otherwise just queue it and return. To unconfigure all logical
addresses call this function with log_addrs set to NULL or with
log_addrs->num_log_addrs set to 0. The block argument is ignored when
unconfiguring. This function will just return if the physical address is
invalid. Once the physical address becomes valid, then the framework will
attempt to claim these logical addresses.

31
Documentation/devicetree/bindings/media/s5p-cec.txt Normal file
View File

@ -0,0 +1,31 @@
* Samsung HDMI CEC driver
The HDMI CEC module is present is Samsung SoCs and its purpose is to
handle communication between HDMI connected devices over the CEC bus.
Required properties:
- compatible : value should be following
"samsung,s5p-cec"
- reg : Physical base address of the IP registers and length of memory
mapped region.
- interrupts : HDMI CEC interrupt number to the CPU.
- clocks : from common clock binding: handle to HDMI CEC clock.
- clock-names : from common clock binding: must contain "hdmicec",
corresponding to entry in the clocks property.
- samsung,syscon-phandle - phandle to the PMU system controller
Example:
hdmicec: cec@100B0000 {
compatible = "samsung,s5p-cec";
reg = <0x100B0000 0x200>;
interrupts = <0 114 0>;
clocks = <&clock CLK_HDMI_CEC>;
clock-names = "hdmicec";
samsung,syscon-phandle = <&pmu_system_controller>;
pinctrl-names = "default";
pinctrl-0 = <&hdmi_cec>;
status = "okay";
};

36
Documentation/video4linux/vivid.txt
View File

@ -74,7 +74,8 @@ Section 11: Cropping, Composing, Scaling
Section 12: Formats
Section 13: Capture Overlay
Section 14: Output Overlay
Section 15: Some Future Improvements
Section 15: CEC (Consumer Electronics Control)
Section 16: Some Future Improvements
Section 1: Configuring the driver
@ -364,7 +365,11 @@ For HDMI inputs it is possible to set the EDID. By default a simple EDID
is provided. You can only set the EDID for HDMI inputs. Internally, however,
the EDID is shared between all HDMI inputs.
No interpretation is done of the EDID data.
No interpretation is done of the EDID data with the exception of the
physical address. See the CEC section for more details.
There is a maximum of 15 HDMI inputs (if there are more, then they will be
reduced to 15) since that's the limitation of the EDID physical address.
Section 3: Video Output
@ -409,6 +414,9 @@ standard, and for all others a 1:1 pixel aspect ratio is returned.
An HDMI output has a valid EDID which can be obtained through VIDIOC_G_EDID.
There is a maximum of 15 HDMI outputs (if there are more, then they will be
reduced to 15) since that's the limitation of the EDID physical address. See
also the CEC section for more details.
Section 4: VBI Capture
----------------------
@ -1108,7 +1116,26 @@ capabilities will slow down the video loop considerably as a lot of checks have
to be done per pixel.
Section 15: Some Future Improvements
Section 15: CEC (Consumer Electronics Control)
----------------------------------------------
If there are HDMI inputs then a CEC adapter will be created that has
the same number of input ports. This is the equivalent of e.g. a TV that
has that number of inputs. Each HDMI output will also create a
CEC adapter that is hooked up to the corresponding input port, or (if there
are more outputs than inputs) is not hooked up at all. In other words,
this is the equivalent of hooking up each output device to an input port of
the TV. Any remaining output devices remain unconnected.
The EDID that each output reads reports a unique CEC physical address that is
based on the physical address of the EDID of the input. So if the EDID of the
receiver has physical address A.B.0.0, then each output will see an EDID
containing physical address A.B.C.0 where C is 1 to the number of inputs. If
there are more outputs than inputs then the remaining outputs have a CEC adapter
that is disabled and reports an invalid physical address.
Section 16: Some Future Improvements
------------------------------------
Just as a reminder and in no particular order:
@ -1121,8 +1148,6 @@ Just as a reminder and in no particular order:
- Fix sequence/field numbering when looping of video with alternate fields
- Add support for V4L2_CID_BG_COLOR for video outputs
- Add ARGB888 overlay support: better testing of the alpha channel
- Add custom DV timings support
- Add support for V4L2_DV_FL_REDUCED_FPS
- Improve pixel aspect support in the tpg code by passing a real v4l2_fract
- Use per-queue locks and/or per-device locks to improve throughput
- Add support to loop from a specific output to a specific input across
@ -1133,3 +1158,4 @@ Just as a reminder and in no particular order:
- Make a thread for the RDS generation, that would help in particular for the
"Controls" RDS Rx I/O Mode as the read-only RDS controls could be updated
in real-time.
- Changing the EDID should cause hotplug detect emulation to happen.

23
MAINTAINERS
View File

@ -1647,6 +1647,13 @@ L: linux-media@vger.kernel.org
S: Maintained
F: drivers/media/platform/s5p-tv/
ARM/SAMSUNG S5P SERIES HDMI CEC SUBSYSTEM SUPPORT
M: Kyungmin Park <kyungmin.park@samsung.com>
L: linux-arm-kernel@lists.infradead.org
L: linux-media@vger.kernel.org
S: Maintained
F: drivers/staging/media/platform/s5p-cec/
ARM/SAMSUNG S5P SERIES JPEG CODEC SUPPORT
M: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
M: Jacek Anaszewski <j.anaszewski@samsung.com>
@ -2852,6 +2859,22 @@ F: drivers/net/ieee802154/cc2520.c
F: include/linux/spi/cc2520.h
F: Documentation/devicetree/bindings/net/ieee802154/cc2520.txt
CEC DRIVER
M: Hans Verkuil <hans.verkuil@cisco.com>
L: linux-media@vger.kernel.org
T: git git://linuxtv.org/media_tree.git
W: http://linuxtv.org
S: Supported
F: Documentation/cec.txt
F: Documentation/DocBook/media/v4l/cec*
F: drivers/staging/media/cec/
F: drivers/media/cec-edid.c
F: drivers/media/rc/keymaps/rc-cec.c
F: include/media/cec.h
F: include/media/cec-edid.h
F: include/linux/cec.h
F: include/linux/cec-funcs.h
CELL BROADBAND ENGINE ARCHITECTURE
M: Arnd Bergmann <arnd@arndb.de>
L: linuxppc-dev@lists.ozlabs.org

3
drivers/media/Kconfig
View File

@ -80,6 +80,9 @@ config MEDIA_RC_SUPPORT
Say Y when you have a TV or an IR device.
config MEDIA_CEC_EDID
tristate
#
# Media controller
# Selectable only for webcam/grabbers, as other drivers don't use it

2
drivers/media/Makefile
View File

@ -2,6 +2,8 @@
# Makefile for the kernel multimedia device drivers.
#
obj-$(CONFIG_MEDIA_CEC_EDID) += cec-edid.o
media-objs := media-device.o media-devnode.o media-entity.o
#

168
drivers/media/cec-edid.c Normal file
View File

@ -0,0 +1,168 @@
/*
* cec-edid - HDMI Consumer Electronics Control EDID & CEC helper functions
*
* Copyright 2016 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <media/cec-edid.h>
/*
* This EDID is expected to be a CEA-861 compliant, which means that there are
* at least two blocks and one or more of the extensions blocks are CEA-861
* blocks.
*
* The returned location is guaranteed to be < size - 1.
*/
static unsigned int cec_get_edid_spa_location(const u8 *edid, unsigned int size)
{
unsigned int blocks = size / 128;
unsigned int block;
u8 d;
/* Sanity check: at least 2 blocks and a multiple of the block size */
if (blocks < 2 || size % 128)
return 0;
/*
* If there are fewer extension blocks than the size, then update
* 'blocks'. It is allowed to have more extension blocks than the size,
* since some hardware can only read e.g. 256 bytes of the EDID, even
* though more blocks are present. The first CEA-861 extension block
* should normally be in block 1 anyway.
*/
if (edid[0x7e] + 1 < blocks)
blocks = edid[0x7e] + 1;
for (block = 1; block < blocks; block++) {
unsigned int offset = block * 128;
/* Skip any non-CEA-861 extension blocks */
if (edid[offset] != 0x02 || edid[offset + 1] != 0x03)
continue;
/* search Vendor Specific Data Block (tag 3) */
d = edid[offset + 2] & 0x7f;
/* Check if there are Data Blocks */
if (d <= 4)
continue;
if (d > 4) {
unsigned int i = offset + 4;
unsigned int end = offset + d;
/* Note: 'end' is always < 'size' */
do {
u8 tag = edid[i] >> 5;
u8 len = edid[i] & 0x1f;
if (tag == 3 && len >= 5 && i + len <= end)
return i + 4;
i += len + 1;
} while (i < end);
}
}
return 0;
}
u16 cec_get_edid_phys_addr(const u8 *edid, unsigned int size,
unsigned int *offset)
{
unsigned int loc = cec_get_edid_spa_location(edid, size);
if (offset)
*offset = loc;
if (loc == 0)
return CEC_PHYS_ADDR_INVALID;
return (edid[loc] << 8) | edid[loc + 1];
}
EXPORT_SYMBOL_GPL(cec_get_edid_phys_addr);
void cec_set_edid_phys_addr(u8 *edid, unsigned int size, u16 phys_addr)
{
unsigned int loc = cec_get_edid_spa_location(edid, size);
u8 sum = 0;
unsigned int i;
if (loc == 0)
return;
edid[loc] = phys_addr >> 8;
edid[loc + 1] = phys_addr & 0xff;
loc &= ~0x7f;
/* update the checksum */
for (i = loc; i < loc + 127; i++)
sum += edid[i];
edid[i] = 256 - sum;
}
EXPORT_SYMBOL_GPL(cec_set_edid_phys_addr);
u16 cec_phys_addr_for_input(u16 phys_addr, u8 input)
{
/* Check if input is sane */
if (WARN_ON(input == 0 || input > 0xf))
return CEC_PHYS_ADDR_INVALID;
if (phys_addr == 0)
return input << 12;
if ((phys_addr & 0x0fff) == 0)
return phys_addr | (input << 8);
if ((phys_addr & 0x00ff) == 0)
return phys_addr | (input << 4);
if ((phys_addr & 0x000f) == 0)
return phys_addr | input;
/*
* All nibbles are used so no valid physical addresses can be assigned
* to the input.
*/
return CEC_PHYS_ADDR_INVALID;
}
EXPORT_SYMBOL_GPL(cec_phys_addr_for_input);
int cec_phys_addr_validate(u16 phys_addr, u16 *parent, u16 *port)
{
int i;
if (parent)
*parent = phys_addr;
if (port)
*port = 0;
if (phys_addr == CEC_PHYS_ADDR_INVALID)
return 0;
for (i = 0; i < 16; i += 4)
if (phys_addr & (0xf << i))
break;
if (i == 16)
return 0;
if (parent)
*parent = phys_addr & (0xfff0 << i);
if (port)
*port = (phys_addr >> i) & 0xf;
for (i += 4; i < 16; i += 4)
if ((phys_addr & (0xf << i)) == 0)
return -EINVAL;
return 0;
}
EXPORT_SYMBOL_GPL(cec_phys_addr_validate);
MODULE_AUTHOR("Hans Verkuil <hans.verkuil@cisco.com>");
MODULE_DESCRIPTION("CEC EDID helper functions");
MODULE_LICENSE("GPL");

24
drivers/media/i2c/Kconfig
View File

@ -209,6 +209,7 @@ config VIDEO_ADV7604
depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API
depends on GPIOLIB || COMPILE_TEST
select HDMI
select MEDIA_CEC_EDID
---help---
Support for the Analog Devices ADV7604 video decoder.
@ -218,10 +219,18 @@ config VIDEO_ADV7604
To compile this driver as a module, choose M here: the
module will be called adv7604.
config VIDEO_ADV7604_CEC
bool "Enable Analog Devices ADV7604 CEC support"
depends on VIDEO_ADV7604 && MEDIA_CEC
---help---
When selected the adv7604 will support the optional
HDMI CEC feature.
config VIDEO_ADV7842
tristate "Analog Devices ADV7842 decoder"
depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API
select HDMI
select MEDIA_CEC_EDID
---help---
Support for the Analog Devices ADV7842 video decoder.
@ -231,6 +240,13 @@ config VIDEO_ADV7842
To compile this driver as a module, choose M here: the
module will be called adv7842.
config VIDEO_ADV7842_CEC
bool "Enable Analog Devices ADV7842 CEC support"
depends on VIDEO_ADV7842 && MEDIA_CEC
---help---
When selected the adv7842 will support the optional
HDMI CEC feature.
config VIDEO_BT819
tristate "BT819A VideoStream decoder"
depends on VIDEO_V4L2 && I2C
@ -447,6 +463,7 @@ config VIDEO_ADV7511
tristate "Analog Devices ADV7511 encoder"
depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API
select HDMI
select MEDIA_CEC_EDID
---help---
Support for the Analog Devices ADV7511 video encoder.
@ -455,6 +472,13 @@ config VIDEO_ADV7511
To compile this driver as a module, choose M here: the
module will be called adv7511.
config VIDEO_ADV7511_CEC
bool "Enable Analog Devices ADV7511 CEC support"
depends on VIDEO_ADV7511 && MEDIA_CEC
---help---
When selected the adv7511 will support the optional
HDMI CEC feature.
config VIDEO_AD9389B
tristate "Analog Devices AD9389B encoder"
depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API

401
drivers/media/i2c/adv7511.c
View File

@ -33,6 +33,7 @@
#include <media/v4l2-ctrls.h>
#include <media/v4l2-dv-timings.h>
#include <media/i2c/adv7511.h>
#include <media/cec.h>
static int debug;
module_param(debug, int, 0644);
@ -59,6 +60,8 @@ MODULE_LICENSE("GPL v2");
#define ADV7511_MIN_PIXELCLOCK 20000000
#define ADV7511_MAX_PIXELCLOCK 225000000
#define ADV7511_MAX_ADDRS (3)
/*
**********************************************************************
*
@ -90,12 +93,20 @@ struct adv7511_state {
struct v4l2_ctrl_handler hdl;
int chip_revision;
u8 i2c_edid_addr;
u8 i2c_cec_addr;
u8 i2c_pktmem_addr;
u8 i2c_cec_addr;
struct i2c_client *i2c_cec;
struct cec_adapter *cec_adap;
u8 cec_addr[ADV7511_MAX_ADDRS];
u8 cec_valid_addrs;
bool cec_enabled_adap;
/* Is the adv7511 powered on? */
bool power_on;
/* Did we receive hotplug and rx-sense signals? */
bool have_monitor;
bool enabled_irq;
/* timings from s_dv_timings */
struct v4l2_dv_timings dv_timings;
u32 fmt_code;
@ -227,7 +238,7 @@ static int adv_smbus_read_i2c_block_data(struct i2c_client *client,
return ret;
}
static inline void adv7511_edid_rd(struct v4l2_subdev *sd, u16 len, u8 *buf)
static void adv7511_edid_rd(struct v4l2_subdev *sd, uint16_t len, uint8_t *buf)
{
struct adv7511_state *state = get_adv7511_state(sd);
int i;
@ -242,6 +253,34 @@ static inline void adv7511_edid_rd(struct v4l2_subdev *sd, u16 len, u8 *buf)
v4l2_err(sd, "%s: i2c read error\n", __func__);
}
static inline int adv7511_cec_read(struct v4l2_subdev *sd, u8 reg)
{
struct adv7511_state *state = get_adv7511_state(sd);
return i2c_smbus_read_byte_data(state->i2c_cec, reg);
}
static int adv7511_cec_write(struct v4l2_subdev *sd, u8 reg, u8 val)
{
struct adv7511_state *state = get_adv7511_state(sd);
int ret;
int i;
for (i = 0; i < 3; i++) {
ret = i2c_smbus_write_byte_data(state->i2c_cec, reg, val);
if (ret == 0)
return 0;
}
v4l2_err(sd, "%s: I2C Write Problem\n", __func__);
return ret;
}
static inline int adv7511_cec_write_and_or(struct v4l2_subdev *sd, u8 reg, u8 mask,
u8 val)
{
return adv7511_cec_write(sd, reg, (adv7511_cec_read(sd, reg) & mask) | val);
}
static int adv7511_pktmem_rd(struct v4l2_subdev *sd, u8 reg)
{
struct adv7511_state *state = get_adv7511_state(sd);
@ -425,16 +464,28 @@ static const struct v4l2_ctrl_ops adv7511_ctrl_ops = {
#ifdef CONFIG_VIDEO_ADV_DEBUG
static void adv7511_inv_register(struct v4l2_subdev *sd)
{
struct adv7511_state *state = get_adv7511_state(sd);
v4l2_info(sd, "0x000-0x0ff: Main Map\n");
if (state->i2c_cec)
v4l2_info(sd, "0x100-0x1ff: CEC Map\n");
}
static int adv7511_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
{
struct adv7511_state *state = get_adv7511_state(sd);
reg->size = 1;
switch (reg->reg >> 8) {
case 0:
reg->val = adv7511_rd(sd, reg->reg & 0xff);
break;
case 1:
if (state->i2c_cec) {
reg->val = adv7511_cec_read(sd, reg->reg & 0xff);
break;
}
/* fall through */
default:
v4l2_info(sd, "Register %03llx not supported\n", reg->reg);
adv7511_inv_register(sd);
@ -445,10 +496,18 @@ static int adv7511_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *
static int adv7511_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg)
{
struct adv7511_state *state = get_adv7511_state(sd);
switch (reg->reg >> 8) {
case 0:
adv7511_wr(sd, reg->reg & 0xff, reg->val & 0xff);
break;
case 1:
if (state->i2c_cec) {
adv7511_cec_write(sd, reg->reg & 0xff, reg->val & 0xff);
break;
}
/* fall through */
default:
v4l2_info(sd, "Register %03llx not supported\n", reg->reg);
adv7511_inv_register(sd);
@ -536,6 +595,7 @@ static int adv7511_log_status(struct v4l2_subdev *sd)
{
struct adv7511_state *state = get_adv7511_state(sd);
struct adv7511_state_edid *edid = &state->edid;
int i;
static const char * const states[] = {
"in reset",
@ -605,7 +665,23 @@ static int adv7511_log_status(struct v4l2_subdev *sd)
else
v4l2_info(sd, "no timings set\n");
v4l2_info(sd, "i2c edid addr: 0x%x\n", state->i2c_edid_addr);
if (state->i2c_cec == NULL)
return 0;
v4l2_info(sd, "i2c cec addr: 0x%x\n", state->i2c_cec_addr);
v4l2_info(sd, "CEC: %s\n", state->cec_enabled_adap ?
"enabled" : "disabled");
if (state->cec_enabled_adap) {
for (i = 0; i < ADV7511_MAX_ADDRS; i++) {
bool is_valid = state->cec_valid_addrs & (1 << i);
if (is_valid)
v4l2_info(sd, "CEC Logical Address: 0x%x\n",
state->cec_addr[i]);
}
}
v4l2_info(sd, "i2c pktmem addr: 0x%x\n", state->i2c_pktmem_addr);
return 0;
}
@ -663,15 +739,197 @@ static int adv7511_s_power(struct v4l2_subdev *sd, int on)
return true;
}
#if IS_ENABLED(CONFIG_VIDEO_ADV7511_CEC)
static int adv7511_cec_adap_enable(struct cec_adapter *adap, bool enable)
{
struct adv7511_state *state = adap->priv;
struct v4l2_subdev *sd = &state->sd;
if (state->i2c_cec == NULL)
return -EIO;
if (!state->cec_enabled_adap && enable) {
/* power up cec section */
adv7511_cec_write_and_or(sd, 0x4e, 0xfc, 0x01);
/* legacy mode and clear all rx buffers */
adv7511_cec_write(sd, 0x4a, 0x07);
adv7511_cec_write(sd, 0x4a, 0);
adv7511_cec_write_and_or(sd, 0x11, 0xfe, 0); /* initially disable tx */
/* enabled irqs: */
/* tx: ready */
/* tx: arbitration lost */
/* tx: retry timeout */
/* rx: ready 1 */
if (state->enabled_irq)
adv7511_wr_and_or(sd, 0x95, 0xc0, 0x39);
} else if (state->cec_enabled_adap && !enable) {
if (state->enabled_irq)
adv7511_wr_and_or(sd, 0x95, 0xc0, 0x00);
/* disable address mask 1-3 */
adv7511_cec_write_and_or(sd, 0x4b, 0x8f, 0x00);
/* power down cec section */
adv7511_cec_write_and_or(sd, 0x4e, 0xfc, 0x00);
state->cec_valid_addrs = 0;
}
state->cec_enabled_adap = enable;
return 0;
}
static int adv7511_cec_adap_log_addr(struct cec_adapter *adap, u8 addr)
{
struct adv7511_state *state = adap->priv;
struct v4l2_subdev *sd = &state->sd;
unsigned int i, free_idx = ADV7511_MAX_ADDRS;
if (!state->cec_enabled_adap)
return addr == CEC_LOG_ADDR_INVALID ? 0 : -EIO;
if (addr == CEC_LOG_ADDR_INVALID) {
adv7511_cec_write_and_or(sd, 0x4b, 0x8f, 0);
state->cec_valid_addrs = 0;
return 0;
}
for (i = 0; i < ADV7511_MAX_ADDRS; i++) {
bool is_valid = state->cec_valid_addrs & (1 << i);
if (free_idx == ADV7511_MAX_ADDRS && !is_valid)
free_idx = i;
if (is_valid && state->cec_addr[i] == addr)
return 0;
}
if (i == ADV7511_MAX_ADDRS) {
i = free_idx;
if (i == ADV7511_MAX_ADDRS)
return -ENXIO;
}
state->cec_addr[i] = addr;
state->cec_valid_addrs |= 1 << i;
switch (i) {
case 0:
/* enable address mask 0 */
adv7511_cec_write_and_or(sd, 0x4b, 0xef, 0x10);
/* set address for mask 0 */
adv7511_cec_write_and_or(sd, 0x4c, 0xf0, addr);
break;
case 1:
/* enable address mask 1 */
adv7511_cec_write_and_or(sd, 0x4b, 0xdf, 0x20);
/* set address for mask 1 */
adv7511_cec_write_and_or(sd, 0x4c, 0x0f, addr << 4);
break;
case 2:
/* enable address mask 2 */
adv7511_cec_write_and_or(sd, 0x4b, 0xbf, 0x40);
/* set address for mask 1 */
adv7511_cec_write_and_or(sd, 0x4d, 0xf0, addr);
break;
}
return 0;
}
static int adv7511_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
u32 signal_free_time, struct cec_msg *msg)
{
struct adv7511_state *state = adap->priv;
struct v4l2_subdev *sd = &state->sd;
u8 len = msg->len;
unsigned int i;
v4l2_dbg(1, debug, sd, "%s: len %d\n", __func__, len);
if (len > 16) {
v4l2_err(sd, "%s: len exceeded 16 (%d)\n", __func__, len);
return -EINVAL;
}
/*
* The number of retries is the number of attempts - 1, but retry
* at least once. It's not clear if a value of 0 is allowed, so
* let's do at least one retry.
*/
adv7511_cec_write_and_or(sd, 0x12, ~0x70, max(1, attempts - 1) << 4);
/* blocking, clear cec tx irq status */
adv7511_wr_and_or(sd, 0x97, 0xc7, 0x38);
/* write data */
for (i = 0; i < len; i++)
adv7511_cec_write(sd, i, msg->msg[i]);
/* set length (data + header) */
adv7511_cec_write(sd, 0x10, len);
/* start transmit, enable tx */
adv7511_cec_write(sd, 0x11, 0x01);
return 0;
}
static void adv_cec_tx_raw_status(struct v4l2_subdev *sd, u8 tx_raw_status)
{
struct adv7511_state *state = get_adv7511_state(sd);
if ((adv7511_cec_read(sd, 0x11) & 0x01) == 0) {
v4l2_dbg(1, debug, sd, "%s: tx raw: tx disabled\n", __func__);
return;
}
if (tx_raw_status & 0x10) {
v4l2_dbg(1, debug, sd,
"%s: tx raw: arbitration lost\n", __func__);
cec_transmit_done(state->cec_adap, CEC_TX_STATUS_ARB_LOST,
1, 0, 0, 0);
return;
}
if (tx_raw_status & 0x08) {
u8 status;
u8 nack_cnt;
u8 low_drive_cnt;
v4l2_dbg(1, debug, sd, "%s: tx raw: retry failed\n", __func__);
/*
* We set this status bit since this hardware performs
* retransmissions.
*/
status = CEC_TX_STATUS_MAX_RETRIES;
nack_cnt = adv7511_cec_read(sd, 0x14) & 0xf;
if (nack_cnt)
status |= CEC_TX_STATUS_NACK;
low_drive_cnt = adv7511_cec_read(sd, 0x14) >> 4;
if (low_drive_cnt)
status |= CEC_TX_STATUS_LOW_DRIVE;
cec_transmit_done(state->cec_adap, status,
0, nack_cnt, low_drive_cnt, 0);
return;
}
if (tx_raw_status & 0x20) {
v4l2_dbg(1, debug, sd, "%s: tx raw: ready ok\n", __func__);
cec_transmit_done(state->cec_adap, CEC_TX_STATUS_OK, 0, 0, 0, 0);
return;
}
}
static const struct cec_adap_ops adv7511_cec_adap_ops = {
.adap_enable = adv7511_cec_adap_enable,
.adap_log_addr = adv7511_cec_adap_log_addr,
.adap_transmit = adv7511_cec_adap_transmit,
};
#endif
/* Enable interrupts */
static void adv7511_set_isr(struct v4l2_subdev *sd, bool enable)
{
struct adv7511_state *state = get_adv7511_state(sd);
u8 irqs = MASK_ADV7511_HPD_INT | MASK_ADV7511_MSEN_INT;
u8 irqs_rd;
int retries = 100;
v4l2_dbg(2, debug, sd, "%s: %s\n", __func__, enable ? "enable" : "disable");
if (state->enabled_irq == enable)
return;
state->enabled_irq = enable;
/* The datasheet says that the EDID ready interrupt should be
disabled if there is no hotplug. */
if (!enable)
@ -679,6 +937,9 @@ static void adv7511_set_isr(struct v4l2_subdev *sd, bool enable)
else if (adv7511_have_hotplug(sd))
irqs |= MASK_ADV7511_EDID_RDY_INT;
adv7511_wr_and_or(sd, 0x95, 0xc0,
(state->cec_enabled_adap && enable) ? 0x39 : 0x00);
/*
* This i2c write can fail (approx. 1 in 1000 writes). But it
* is essential that this register is correct, so retry it
@ -701,20 +962,53 @@ static void adv7511_set_isr(struct v4l2_subdev *sd, bool enable)
static int adv7511_isr(struct v4l2_subdev *sd, u32 status, bool *handled)
{
u8 irq_status;
u8 cec_irq;
/* disable interrupts to prevent a race condition */
adv7511_set_isr(sd, false);
irq_status = adv7511_rd(sd, 0x96);
cec_irq = adv7511_rd(sd, 0x97);
/* clear detected interrupts */
adv7511_wr(sd, 0x96, irq_status);
adv7511_wr(sd, 0x97, cec_irq);
v4l2_dbg(1, debug, sd, "%s: irq 0x%x\n", __func__, irq_status);
v4l2_dbg(1, debug, sd, "%s: irq 0x%x, cec-irq 0x%x\n", __func__,
irq_status, cec_irq);
if (irq_status & (MASK_ADV7511_HPD_INT | MASK_ADV7511_MSEN_INT))
adv7511_check_monitor_present_status(sd);
if (irq_status & MASK_ADV7511_EDID_RDY_INT)
adv7511_check_edid_status(sd);
#if IS_ENABLED(CONFIG_VIDEO_ADV7511_CEC)
if (cec_irq & 0x38)
adv_cec_tx_raw_status(sd, cec_irq);
if (cec_irq & 1) {
struct adv7511_state *state = get_adv7511_state(sd);
struct cec_msg msg;
msg.len = adv7511_cec_read(sd, 0x25) & 0x1f;
v4l2_dbg(1, debug, sd, "%s: cec msg len %d\n", __func__,
msg.len);
if (msg.len > 16)
msg.len = 16;
if (msg.len) {
u8 i;
for (i = 0; i < msg.len; i++)
msg.msg[i] = adv7511_cec_read(sd, i + 0x15);
adv7511_cec_write(sd, 0x4a, 1); /* toggle to re-enable rx 1 */
adv7511_cec_write(sd, 0x4a, 0);
cec_received_msg(state->cec_adap, &msg);
}
}
#endif
/* enable interrupts */
adv7511_set_isr(sd, true);
@ -1183,6 +1477,8 @@ static void adv7511_notify_no_edid(struct v4l2_subdev *sd)
/* We failed to read the EDID, so send an event for this. */
ed.present = false;
ed.segment = adv7511_rd(sd, 0xc4);
ed.phys_addr = CEC_PHYS_ADDR_INVALID;
cec_s_phys_addr(state->cec_adap, ed.phys_addr, false);
v4l2_subdev_notify(sd, ADV7511_EDID_DETECT, (void *)&ed);
v4l2_ctrl_s_ctrl(state->have_edid0_ctrl, 0x0);
}
@ -1406,13 +1702,16 @@ static bool adv7511_check_edid_status(struct v4l2_subdev *sd)
v4l2_dbg(1, debug, sd, "%s: edid complete with %d segment(s)\n", __func__, state->edid.segments);
state->edid.complete = true;
ed.phys_addr = cec_get_edid_phys_addr(state->edid.data,
state->edid.segments * 256,
NULL);
/* report when we have all segments
but report only for segment 0
*/
ed.present = true;
ed.segment = 0;
state->edid_detect_counter++;
cec_s_phys_addr(state->cec_adap, ed.phys_addr, false);
v4l2_subdev_notify(sd, ADV7511_EDID_DETECT, (void *)&ed);
return ed.present;
}
@ -1420,17 +1719,43 @@ static bool adv7511_check_edid_status(struct v4l2_subdev *sd)
return false;
}
static int adv7511_registered(struct v4l2_subdev *sd)
{
struct adv7511_state *state = get_adv7511_state(sd);
int err;
err = cec_register_adapter(state->cec_adap);
if (err)
cec_delete_adapter(state->cec_adap);
return err;
}
static void adv7511_unregistered(struct v4l2_subdev *sd)
{
struct adv7511_state *state = get_adv7511_state(sd);
cec_unregister_adapter(state->cec_adap);
}
static const struct v4l2_subdev_internal_ops adv7511_int_ops = {
.registered = adv7511_registered,
.unregistered = adv7511_unregistered,
};
/* ----------------------------------------------------------------------- */
/* Setup ADV7511 */
static void adv7511_init_setup(struct v4l2_subdev *sd)
{
struct adv7511_state *state = get_adv7511_state(sd);
struct adv7511_state_edid *edid = &state->edid;
u32 cec_clk = state->pdata.cec_clk;
u8 ratio;
v4l2_dbg(1, debug, sd, "%s\n", __func__);
/* clear all interrupts */
adv7511_wr(sd, 0x96, 0xff);
adv7511_wr(sd, 0x97, 0xff);
/*
* Stop HPD from resetting a lot of registers.
* It might leave the chip in a partly un-initialized state,
@ -1442,6 +1767,25 @@ static void adv7511_init_setup(struct v4l2_subdev *sd)
adv7511_set_isr(sd, false);
adv7511_s_stream(sd, false);
adv7511_s_audio_stream(sd, false);
if (state->i2c_cec == NULL)
return;
v4l2_dbg(1, debug, sd, "%s: cec_clk %d\n", __func__, cec_clk);
/* cec soft reset */
adv7511_cec_write(sd, 0x50, 0x01);
adv7511_cec_write(sd, 0x50, 0x00);
/* legacy mode */
adv7511_cec_write(sd, 0x4a, 0x00);
if (cec_clk % 750000 != 0)
v4l2_err(sd, "%s: cec_clk %d, not multiple of 750 Khz\n",
__func__, cec_clk);
ratio = (cec_clk / 750000) - 1;
adv7511_cec_write(sd, 0x4e, ratio << 2);
}
static int adv7511_probe(struct i2c_client *client, const struct i2c_device_id *id)
@ -1476,6 +1820,7 @@ static int adv7511_probe(struct i2c_client *client, const struct i2c_device_id *
client->addr << 1);
v4l2_i2c_subdev_init(sd, client, &adv7511_ops);
sd->internal_ops = &adv7511_int_ops;
hdl = &state->hdl;
v4l2_ctrl_handler_init(hdl, 10);
@ -1516,26 +1861,47 @@ static int adv7511_probe(struct i2c_client *client, const struct i2c_device_id *
chip_id[0] = adv7511_rd(sd, 0xf5);
chip_id[1] = adv7511_rd(sd, 0xf6);
if (chip_id[0] != 0x75 || chip_id[1] != 0x11) {
v4l2_err(sd, "chip_id != 0x7511, read 0x%02x%02x\n", chip_id[0], chip_id[1]);
v4l2_err(sd, "chip_id != 0x7511, read 0x%02x%02x\n", chip_id[0],
chip_id[1]);
err = -EIO;
goto err_entity;
}
state->i2c_edid = i2c_new_dummy(client->adapter, state->i2c_edid_addr >> 1);
state->i2c_edid = i2c_new_dummy(client->adapter,
state->i2c_edid_addr >> 1);
if (state->i2c_edid == NULL) {
v4l2_err(sd, "failed to register edid i2c client\n");
err = -ENOMEM;
goto err_entity;
}
adv7511_wr(sd, 0xe1, state->i2c_cec_addr);
if (state->pdata.cec_clk < 3000000 ||
state->pdata.cec_clk > 100000000) {
v4l2_err(sd, "%s: cec_clk %u outside range, disabling cec\n",
__func__, state->pdata.cec_clk);
state->pdata.cec_clk = 0;
}
if (state->pdata.cec_clk) {
state->i2c_cec = i2c_new_dummy(client->adapter,
state->i2c_cec_addr >> 1);
if (state->i2c_cec == NULL) {
v4l2_err(sd, "failed to register cec i2c client\n");
goto err_unreg_edid;
}
adv7511_wr(sd, 0xe2, 0x00); /* power up cec section */
} else {
adv7511_wr(sd, 0xe2, 0x01); /* power down cec section */
}
state->i2c_pktmem = i2c_new_dummy(client->adapter, state->i2c_pktmem_addr >> 1);
if (state->i2c_pktmem == NULL) {
v4l2_err(sd, "failed to register pktmem i2c client\n");
err = -ENOMEM;
goto err_unreg_edid;
goto err_unreg_cec;
}
adv7511_wr(sd, 0xe2, 0x01); /* power down cec section */
state->work_queue = create_singlethread_workqueue(sd->name);
if (state->work_queue == NULL) {
v4l2_err(sd, "could not create workqueue\n");
@ -1546,6 +1912,19 @@ static int adv7511_probe(struct i2c_client *client, const struct i2c_device_id *
INIT_DELAYED_WORK(&state->edid_handler, adv7511_edid_handler);
adv7511_init_setup(sd);
#if IS_ENABLED(CONFIG_VIDEO_ADV7511_CEC)
state->cec_adap = cec_allocate_adapter(&adv7511_cec_adap_ops,
state, dev_name(&client->dev), CEC_CAP_TRANSMIT |
CEC_CAP_LOG_ADDRS | CEC_CAP_PASSTHROUGH | CEC_CAP_RC,
ADV7511_MAX_ADDRS, &client->dev);
err = PTR_ERR_OR_ZERO(state->cec_adap);
if (err) {
destroy_workqueue(state->work_queue);
goto err_unreg_pktmem;
}
#endif
adv7511_set_isr(sd, true);
adv7511_check_monitor_present_status(sd);
@ -1555,6 +1934,9 @@ static int adv7511_probe(struct i2c_client *client, const struct i2c_device_id *
err_unreg_pktmem:
i2c_unregister_device(state->i2c_pktmem);
err_unreg_cec:
if (state->i2c_cec)
i2c_unregister_device(state->i2c_cec);
err_unreg_edid:
i2c_unregister_device(state->i2c_edid);
err_entity:
@ -1576,9 +1958,12 @@ static int adv7511_remove(struct i2c_client *client)
v4l2_dbg(1, debug, sd, "%s removed @ 0x%x (%s)\n", client->name,
client->addr << 1, client->adapter->name);
adv7511_set_isr(sd, false);
adv7511_init_setup(sd);
cancel_delayed_work(&state->edid_handler);
i2c_unregister_device(state->i2c_edid);
if (state->i2c_cec)
i2c_unregister_device(state->i2c_cec);
i2c_unregister_device(state->i2c_pktmem);
destroy_workqueue(state->work_queue);
v4l2_device_unregister_subdev(sd);

332
drivers/media/i2c/adv7604.c
View File

@ -40,6 +40,7 @@
#include <linux/regmap.h>
#include <media/i2c/adv7604.h>
#include <media/cec.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-event.h>
@ -80,6 +81,8 @@ MODULE_LICENSE("GPL");
#define ADV76XX_OP_SWAP_CB_CR (1 << 0)
#define ADV76XX_MAX_ADDRS (3)
enum adv76xx_type {
ADV7604,
ADV7611,
@ -188,6 +191,12 @@ struct adv76xx_state {
struct delayed_work delayed_work_enable_hotplug;
bool restart_stdi_once;
/* CEC */
struct cec_adapter *cec_adap;
u8 cec_addr[ADV76XX_MAX_ADDRS];
u8 cec_valid_addrs;
bool cec_enabled_adap;
/* i2c clients */
struct i2c_client *i2c_clients[ADV76XX_PAGE_MAX];
@ -381,7 +390,8 @@ static inline int io_write(struct v4l2_subdev *sd, u8 reg, u8 val)
return regmap_write(state->regmap[ADV76XX_PAGE_IO], reg, val);
}
static inline int io_write_clr_set(struct v4l2_subdev *sd, u8 reg, u8 mask, u8 val)
static inline int io_write_clr_set(struct v4l2_subdev *sd, u8 reg, u8 mask,
u8 val)
{
return io_write(sd, reg, (io_read(sd, reg) & ~mask) | val);
}
@ -414,6 +424,12 @@ static inline int cec_write(struct v4l2_subdev *sd, u8 reg, u8 val)
return regmap_write(state->regmap[ADV76XX_PAGE_CEC], reg, val);
}
static inline int cec_write_clr_set(struct v4l2_subdev *sd, u8 reg, u8 mask,
u8 val)
{
return cec_write(sd, reg, (cec_read(sd, reg) & ~mask) | val);
}
static inline int infoframe_read(struct v4l2_subdev *sd, u8 reg)
{
struct adv76xx_state *state = to_state(sd);
@ -892,9 +908,9 @@ static int adv76xx_s_detect_tx_5v_ctrl(struct v4l2_subdev *sd)
{
struct adv76xx_state *state = to_state(sd);
const struct adv76xx_chip_info *info = state->info;
u16 cable_det = info->read_cable_det(sd);
return v4l2_ctrl_s_ctrl(state->detect_tx_5v_ctrl,
info->read_cable_det(sd));
return v4l2_ctrl_s_ctrl(state->detect_tx_5v_ctrl, cable_det);
}
static int find_and_set_predefined_video_timings(struct v4l2_subdev *sd,
@ -1924,6 +1940,210 @@ static int adv76xx_set_format(struct v4l2_subdev *sd,
return 0;
}
#if IS_ENABLED(CONFIG_VIDEO_ADV7604_CEC)
static void adv76xx_cec_tx_raw_status(struct v4l2_subdev *sd, u8 tx_raw_status)
{
struct adv76xx_state *state = to_state(sd);
if ((cec_read(sd, 0x11) & 0x01) == 0) {
v4l2_dbg(1, debug, sd, "%s: tx raw: tx disabled\n", __func__);
return;
}
if (tx_raw_status & 0x02) {
v4l2_dbg(1, debug, sd, "%s: tx raw: arbitration lost\n",
__func__);
cec_transmit_done(state->cec_adap, CEC_TX_STATUS_ARB_LOST,
1, 0, 0, 0);
}
if (tx_raw_status & 0x04) {
u8 status;
u8 nack_cnt;
u8 low_drive_cnt;
v4l2_dbg(1, debug, sd, "%s: tx raw: retry failed\n", __func__);
/*
* We set this status bit since this hardware performs
* retransmissions.
*/
status = CEC_TX_STATUS_MAX_RETRIES;
nack_cnt = cec_read(sd, 0x14) & 0xf;
if (nack_cnt)
status |= CEC_TX_STATUS_NACK;
low_drive_cnt = cec_read(sd, 0x14) >> 4;
if (low_drive_cnt)
status |= CEC_TX_STATUS_LOW_DRIVE;
cec_transmit_done(state->cec_adap, status,
0, nack_cnt, low_drive_cnt, 0);
return;
}
if (tx_raw_status & 0x01) {
v4l2_dbg(1, debug, sd, "%s: tx raw: ready ok\n", __func__);
cec_transmit_done(state->cec_adap, CEC_TX_STATUS_OK, 0, 0, 0, 0);
return;
}
}
static void adv76xx_cec_isr(struct v4l2_subdev *sd, bool *handled)
{
struct adv76xx_state *state = to_state(sd);
u8 cec_irq;
/* cec controller */
cec_irq = io_read(sd, 0x4d) & 0x0f;
if (!cec_irq)
return;
v4l2_dbg(1, debug, sd, "%s: cec: irq 0x%x\n", __func__, cec_irq);
adv76xx_cec_tx_raw_status(sd, cec_irq);
if (cec_irq & 0x08) {
struct cec_msg msg;
msg.len = cec_read(sd, 0x25) & 0x1f;
if (msg.len > 16)
msg.len = 16;
if (msg.len) {
u8 i;
for (i = 0; i < msg.len; i++)
msg.msg[i] = cec_read(sd, i + 0x15);
cec_write(sd, 0x26, 0x01); /* re-enable rx */
cec_received_msg(state->cec_adap, &msg);
}
}
/* note: the bit order is swapped between 0x4d and 0x4e */
cec_irq = ((cec_irq & 0x08) >> 3) | ((cec_irq & 0x04) >> 1) |
((cec_irq & 0x02) << 1) | ((cec_irq & 0x01) << 3);
io_write(sd, 0x4e, cec_irq);
if (handled)
*handled = true;
}
static int adv76xx_cec_adap_enable(struct cec_adapter *adap, bool enable)
{
struct adv76xx_state *state = adap->priv;
struct v4l2_subdev *sd = &state->sd;
if (!state->cec_enabled_adap && enable) {
cec_write_clr_set(sd, 0x2a, 0x01, 0x01); /* power up cec */
cec_write(sd, 0x2c, 0x01); /* cec soft reset */
cec_write_clr_set(sd, 0x11, 0x01, 0); /* initially disable tx */
/* enabled irqs: */
/* tx: ready */
/* tx: arbitration lost */
/* tx: retry timeout */
/* rx: ready */
io_write_clr_set(sd, 0x50, 0x0f, 0x0f);
cec_write(sd, 0x26, 0x01); /* enable rx */
} else if (state->cec_enabled_adap && !enable) {
/* disable cec interrupts */
io_write_clr_set(sd, 0x50, 0x0f, 0x00);
/* disable address mask 1-3 */
cec_write_clr_set(sd, 0x27, 0x70, 0x00);
/* power down cec section */
cec_write_clr_set(sd, 0x2a, 0x01, 0x00);
state->cec_valid_addrs = 0;
}
state->cec_enabled_adap = enable;
adv76xx_s_detect_tx_5v_ctrl(sd);
return 0;
}
static int adv76xx_cec_adap_log_addr(struct cec_adapter *adap, u8 addr)
{
struct adv76xx_state *state = adap->priv;
struct v4l2_subdev *sd = &state->sd;
unsigned int i, free_idx = ADV76XX_MAX_ADDRS;
if (!state->cec_enabled_adap)
return addr == CEC_LOG_ADDR_INVALID ? 0 : -EIO;
if (addr == CEC_LOG_ADDR_INVALID) {
cec_write_clr_set(sd, 0x27, 0x70, 0);
state->cec_valid_addrs = 0;
return 0;
}
for (i = 0; i < ADV76XX_MAX_ADDRS; i++) {
bool is_valid = state->cec_valid_addrs & (1 << i);
if (free_idx == ADV76XX_MAX_ADDRS && !is_valid)
free_idx = i;
if (is_valid && state->cec_addr[i] == addr)
return 0;
}
if (i == ADV76XX_MAX_ADDRS) {
i = free_idx;
if (i == ADV76XX_MAX_ADDRS)
return -ENXIO;
}
state->cec_addr[i] = addr;
state->cec_valid_addrs |= 1 << i;
switch (i) {
case 0:
/* enable address mask 0 */
cec_write_clr_set(sd, 0x27, 0x10, 0x10);
/* set address for mask 0 */
cec_write_clr_set(sd, 0x28, 0x0f, addr);
break;
case 1:
/* enable address mask 1 */
cec_write_clr_set(sd, 0x27, 0x20, 0x20);
/* set address for mask 1 */
cec_write_clr_set(sd, 0x28, 0xf0, addr << 4);
break;
case 2:
/* enable address mask 2 */
cec_write_clr_set(sd, 0x27, 0x40, 0x40);
/* set address for mask 1 */
cec_write_clr_set(sd, 0x29, 0x0f, addr);
break;
}
return 0;
}
static int adv76xx_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
u32 signal_free_time, struct cec_msg *msg)
{
struct adv76xx_state *state = adap->priv;
struct v4l2_subdev *sd = &state->sd;
u8 len = msg->len;
unsigned int i;
/*
* The number of retries is the number of attempts - 1, but retry
* at least once. It's not clear if a value of 0 is allowed, so
* let's do at least one retry.
*/
cec_write_clr_set(sd, 0x12, 0x70, max(1, attempts - 1) << 4);
if (len > 16) {
v4l2_err(sd, "%s: len exceeded 16 (%d)\n", __func__, len);
return -EINVAL;
}
/* write data */
for (i = 0; i < len; i++)
cec_write(sd, i, msg->msg[i]);
/* set length (data + header) */
cec_write(sd, 0x10, len);
/* start transmit, enable tx */
cec_write(sd, 0x11, 0x01);
return 0;
}
static const struct cec_adap_ops adv76xx_cec_adap_ops = {
.adap_enable = adv76xx_cec_adap_enable,
.adap_log_addr = adv76xx_cec_adap_log_addr,
.adap_transmit = adv76xx_cec_adap_transmit,
};
#endif
static int adv76xx_isr(struct v4l2_subdev *sd, u32 status, bool *handled)
{
struct adv76xx_state *state = to_state(sd);
@ -1969,6 +2189,11 @@ static int adv76xx_isr(struct v4l2_subdev *sd, u32 status, bool *handled)
*handled = true;
}
#if IS_ENABLED(CONFIG_VIDEO_ADV7604_CEC)
/* cec */
adv76xx_cec_isr(sd, handled);
#endif
/* tx 5v detect */
tx_5v = irq_reg_0x70 & info->cable_det_mask;
if (tx_5v) {
@ -2018,39 +2243,12 @@ static int adv76xx_get_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid)
return 0;
}
static int get_edid_spa_location(const u8 *edid)
{
u8 d;
if ((edid[0x7e] != 1) ||
(edid[0x80] != 0x02) ||
(edid[0x81] != 0x03)) {
return -1;
}
/* search Vendor Specific Data Block (tag 3) */
d = edid[0x82] & 0x7f;
if (d > 4) {
int i = 0x84;
int end = 0x80 + d;
do {
u8 tag = edid[i] >> 5;
u8 len = edid[i] & 0x1f;
if ((tag == 3) && (len >= 5))
return i + 4;
i += len + 1;
} while (i < end);
}
return -1;
}
static int adv76xx_set_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid)
{
struct adv76xx_state *state = to_state(sd);
const struct adv76xx_chip_info *info = state->info;
int spa_loc;
unsigned int spa_loc;
u16 pa;
int err;
int i;
@ -2081,6 +2279,10 @@ static int adv76xx_set_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid)
edid->blocks = 2;
return -E2BIG;
}
pa = cec_get_edid_phys_addr(edid->edid, edid->blocks * 128, &spa_loc);
err = cec_phys_addr_validate(pa, &pa, NULL);
if (err)
return err;
v4l2_dbg(2, debug, sd, "%s: write EDID pad %d, edid.present = 0x%x\n",
__func__, edid->pad, state->edid.present);
@ -2090,9 +2292,12 @@ static int adv76xx_set_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid)
adv76xx_set_hpd(state, 0);
rep_write_clr_set(sd, info->edid_enable_reg, 0x0f, 0x00);
spa_loc = get_edid_spa_location(edid->edid);
if (spa_loc < 0)
spa_loc = 0xc0; /* Default value [REF_02, p. 116] */
/*
* Return an error if no location of the source physical address
* was found.
*/
if (spa_loc == 0)
return -EINVAL;
switch (edid->pad) {
case ADV76XX_PAD_HDMI_PORT_A:
@ -2152,6 +2357,7 @@ static int adv76xx_set_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid)
v4l2_err(sd, "error enabling edid (0x%x)\n", state->edid.present);
return -EIO;
}
cec_s_phys_addr(state->cec_adap, pa, false);
/* enable hotplug after 100 ms */
schedule_delayed_work(&state->delayed_work_enable_hotplug, HZ / 10);
@ -2275,8 +2481,19 @@ static int adv76xx_log_status(struct v4l2_subdev *sd)
((edid_enabled & 0x02) ? "Yes" : "No"),
((edid_enabled & 0x04) ? "Yes" : "No"),
((edid_enabled & 0x08) ? "Yes" : "No"));
v4l2_info(sd, "CEC: %s\n", !!(cec_read(sd, 0x2a) & 0x01) ?
v4l2_info(sd, "CEC: %s\n", state->cec_enabled_adap ?
"enabled" : "disabled");
if (state->cec_enabled_adap) {
int i;
for (i = 0; i < ADV76XX_MAX_ADDRS; i++) {
bool is_valid = state->cec_valid_addrs & (1 << i);
if (is_valid)
v4l2_info(sd, "CEC Logical Address: 0x%x\n",
state->cec_addr[i]);
}
}
v4l2_info(sd, "-----Signal status-----\n");
cable_det = info->read_cable_det(sd);
@ -2386,6 +2603,24 @@ static int adv76xx_subscribe_event(struct v4l2_subdev *sd,
}
}
static int adv76xx_registered(struct v4l2_subdev *sd)
{
struct adv76xx_state *state = to_state(sd);
int err;
err = cec_register_adapter(state->cec_adap);
if (err)
cec_delete_adapter(state->cec_adap);
return err;
}
static void adv76xx_unregistered(struct v4l2_subdev *sd)
{
struct adv76xx_state *state = to_state(sd);
cec_unregister_adapter(state->cec_adap);
}
/* ----------------------------------------------------------------------- */
static const struct v4l2_ctrl_ops adv76xx_ctrl_ops = {
@ -2429,6 +2664,11 @@ static const struct v4l2_subdev_ops adv76xx_ops = {
.pad = &adv76xx_pad_ops,
};
static const struct v4l2_subdev_internal_ops adv76xx_int_ops = {
.registered = adv76xx_registered,
.unregistered = adv76xx_unregistered,
};
/* -------------------------- custom ctrls ---------------------------------- */
static const struct v4l2_ctrl_config adv7604_ctrl_analog_sampling_phase = {
@ -3111,6 +3351,7 @@ static int adv76xx_probe(struct i2c_client *client,
id->name, i2c_adapter_id(client->adapter),
client->addr);
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
sd->internal_ops = &adv76xx_int_ops;
/* Configure IO Regmap region */
err = configure_regmap(state, ADV76XX_PAGE_IO);
@ -3246,6 +3487,18 @@ static int adv76xx_probe(struct i2c_client *client,
err = adv76xx_core_init(sd);
if (err)
goto err_entity;
#if IS_ENABLED(CONFIG_VIDEO_ADV7604_CEC)
state->cec_adap = cec_allocate_adapter(&adv76xx_cec_adap_ops,
state, dev_name(&client->dev),
CEC_CAP_TRANSMIT | CEC_CAP_LOG_ADDRS |
CEC_CAP_PASSTHROUGH | CEC_CAP_RC, ADV76XX_MAX_ADDRS,
&client->dev);
err = PTR_ERR_OR_ZERO(state->cec_adap);
if (err)
goto err_entity;
#endif
v4l2_info(sd, "%s found @ 0x%x (%s)\n", client->name,
client->addr << 1, client->adapter->name);
@ -3273,6 +3526,13 @@ static int adv76xx_remove(struct i2c_client *client)
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct adv76xx_state *state = to_state(sd);
/* disable interrupts */
io_write(sd, 0x40, 0);
io_write(sd, 0x41, 0);
io_write(sd, 0x46, 0);
io_write(sd, 0x6e, 0);
io_write(sd, 0x73, 0);
cancel_delayed_work(&state->delayed_work_enable_hotplug);
v4l2_async_unregister_subdev(sd);
media_entity_cleanup(&sd->entity);

368
drivers/media/i2c/adv7842.c
View File

@ -39,6 +39,7 @@
#include <linux/workqueue.h>
#include <linux/v4l2-dv-timings.h>
#include <linux/hdmi.h>
#include <media/cec.h>
#include <media/v4l2-device.h>
#include <media/v4l2-event.h>
#include <media/v4l2-ctrls.h>
@ -79,6 +80,8 @@ MODULE_LICENSE("GPL");
#define ADV7842_OP_SWAP_CB_CR (1 << 0)
#define ADV7842_MAX_ADDRS (3)
/*
**********************************************************************
*
@ -141,6 +144,11 @@ struct adv7842_state {
struct v4l2_ctrl *free_run_color_ctrl_manual;
struct v4l2_ctrl *free_run_color_ctrl;
struct v4l2_ctrl *rgb_quantization_range_ctrl;
struct cec_adapter *cec_adap;
u8 cec_addr[ADV7842_MAX_ADDRS];
u8 cec_valid_addrs;
bool cec_enabled_adap;
};
/* Unsupported timings. This device cannot support 720p30. */
@ -417,9 +425,9 @@ static inline int cec_write(struct v4l2_subdev *sd, u8 reg, u8 val)
return adv_smbus_write_byte_data(state->i2c_cec, reg, val);
}
static inline int cec_write_and_or(struct v4l2_subdev *sd, u8 reg, u8 mask, u8 val)
static inline int cec_write_clr_set(struct v4l2_subdev *sd, u8 reg, u8 mask, u8 val)
{
return cec_write(sd, reg, (cec_read(sd, reg) & mask) | val);
return cec_write(sd, reg, (cec_read(sd, reg) & ~mask) | val);
}
static inline int infoframe_read(struct v4l2_subdev *sd, u8 reg)
@ -695,6 +703,18 @@ adv7842_get_dv_timings_cap(struct v4l2_subdev *sd)
/* ----------------------------------------------------------------------- */
static u16 adv7842_read_cable_det(struct v4l2_subdev *sd)
{
u8 reg = io_read(sd, 0x6f);
u16 val = 0;
if (reg & 0x02)
val |= 1; /* port A */
if (reg & 0x01)
val |= 2; /* port B */
return val;
}
static void adv7842_delayed_work_enable_hotplug(struct work_struct *work)
{
struct delayed_work *dwork = to_delayed_work(work);
@ -760,50 +780,18 @@ static int edid_write_vga_segment(struct v4l2_subdev *sd)
return 0;
}
static int edid_spa_location(const u8 *edid)
{
u8 d;
/*
* TODO, improve and update for other CEA extensions
* currently only for 1 segment (256 bytes),
* i.e. 1 extension block and CEA revision 3.
*/
if ((edid[0x7e] != 1) ||
(edid[0x80] != 0x02) ||
(edid[0x81] != 0x03)) {
return -EINVAL;
}
/*
* search Vendor Specific Data Block (tag 3)
*/
d = edid[0x82] & 0x7f;
if (d > 4) {
int i = 0x84;
int end = 0x80 + d;
do {
u8 tag = edid[i]>>5;
u8 len = edid[i] & 0x1f;
if ((tag == 3) && (len >= 5))
return i + 4;
i += len + 1;
} while (i < end);
}
return -EINVAL;
}
static int edid_write_hdmi_segment(struct v4l2_subdev *sd, u8 port)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct adv7842_state *state = to_state(sd);
const u8 *val = state->hdmi_edid.edid;
int spa_loc = edid_spa_location(val);
const u8 *edid = state->hdmi_edid.edid;
int spa_loc;
u16 pa;
int err = 0;
int i;
v4l2_dbg(2, debug, sd, "%s: write EDID on port %c (spa at 0x%x)\n",
__func__, (port == ADV7842_EDID_PORT_A) ? 'A' : 'B', spa_loc);
v4l2_dbg(2, debug, sd, "%s: write EDID on port %c\n",
__func__, (port == ADV7842_EDID_PORT_A) ? 'A' : 'B');
/* HPA disable on port A and B */
io_write_and_or(sd, 0x20, 0xcf, 0x00);
@ -814,24 +802,33 @@ static int edid_write_hdmi_segment(struct v4l2_subdev *sd, u8 port)
if (!state->hdmi_edid.present)
return 0;
pa = cec_get_edid_phys_addr(edid, 256, &spa_loc);
err = cec_phys_addr_validate(pa, &pa, NULL);
if (err)
return err;
/*
* Return an error if no location of the source physical address
* was found.
*/
if (spa_loc == 0)
return -EINVAL;
/* edid segment pointer '0' for HDMI ports */
rep_write_and_or(sd, 0x77, 0xef, 0x00);
for (i = 0; !err && i < 256; i += I2C_SMBUS_BLOCK_MAX)
err = adv_smbus_write_i2c_block_data(state->i2c_edid, i,
I2C_SMBUS_BLOCK_MAX, val + i);
I2C_SMBUS_BLOCK_MAX, edid + i);
if (err)
return err;
if (spa_loc < 0)
spa_loc = 0xc0; /* Default value [REF_02, p. 199] */
if (port == ADV7842_EDID_PORT_A) {
rep_write(sd, 0x72, val[spa_loc]);
rep_write(sd, 0x73, val[spa_loc + 1]);
rep_write(sd, 0x72, edid[spa_loc]);
rep_write(sd, 0x73, edid[spa_loc + 1]);
} else {
rep_write(sd, 0x74, val[spa_loc]);
rep_write(sd, 0x75, val[spa_loc + 1]);
rep_write(sd, 0x74, edid[spa_loc]);
rep_write(sd, 0x75, edid[spa_loc + 1]);
}
rep_write(sd, 0x76, spa_loc & 0xff);
rep_write_and_or(sd, 0x77, 0xbf, (spa_loc >> 2) & 0x40);
@ -851,6 +848,7 @@ static int edid_write_hdmi_segment(struct v4l2_subdev *sd, u8 port)
(port == ADV7842_EDID_PORT_A) ? 'A' : 'B');
return -EIO;
}
cec_s_phys_addr(state->cec_adap, pa, false);
/* enable hotplug after 200 ms */
schedule_delayed_work(&state->delayed_work_enable_hotplug, HZ / 5);
@ -980,20 +978,11 @@ static int adv7842_s_register(struct v4l2_subdev *sd,
static int adv7842_s_detect_tx_5v_ctrl(struct v4l2_subdev *sd)
{
struct adv7842_state *state = to_state(sd);
int prev = v4l2_ctrl_g_ctrl(state->detect_tx_5v_ctrl);
u8 reg_io_6f = io_read(sd, 0x6f);
int val = 0;
u16 cable_det = adv7842_read_cable_det(sd);
if (reg_io_6f & 0x02)
val |= 1; /* port A */
if (reg_io_6f & 0x01)
val |= 2; /* port B */
v4l2_dbg(1, debug, sd, "%s: 0x%x\n", __func__, cable_det);
v4l2_dbg(1, debug, sd, "%s: 0x%x -> 0x%x\n", __func__, prev, val);
if (val != prev)
return v4l2_ctrl_s_ctrl(state->detect_tx_5v_ctrl, val);
return 0;
return v4l2_ctrl_s_ctrl(state->detect_tx_5v_ctrl, cable_det);
}
static int find_and_set_predefined_video_timings(struct v4l2_subdev *sd,
@ -2167,6 +2156,207 @@ static void adv7842_irq_enable(struct v4l2_subdev *sd, bool enable)
}
}
#if IS_ENABLED(CONFIG_VIDEO_ADV7842_CEC)
static void adv7842_cec_tx_raw_status(struct v4l2_subdev *sd, u8 tx_raw_status)
{
struct adv7842_state *state = to_state(sd);
if ((cec_read(sd, 0x11) & 0x01) == 0) {
v4l2_dbg(1, debug, sd, "%s: tx raw: tx disabled\n", __func__);
return;
}
if (tx_raw_status & 0x02) {
v4l2_dbg(1, debug, sd, "%s: tx raw: arbitration lost\n",
__func__);
cec_transmit_done(state->cec_adap, CEC_TX_STATUS_ARB_LOST,
1, 0, 0, 0);
return;
}
if (tx_raw_status & 0x04) {
u8 status;
u8 nack_cnt;
u8 low_drive_cnt;
v4l2_dbg(1, debug, sd, "%s: tx raw: retry failed\n", __func__);
/*
* We set this status bit since this hardware performs
* retransmissions.
*/
status = CEC_TX_STATUS_MAX_RETRIES;
nack_cnt = cec_read(sd, 0x14) & 0xf;
if (nack_cnt)
status |= CEC_TX_STATUS_NACK;
low_drive_cnt = cec_read(sd, 0x14) >> 4;
if (low_drive_cnt)
status |= CEC_TX_STATUS_LOW_DRIVE;
cec_transmit_done(state->cec_adap, status,
0, nack_cnt, low_drive_cnt, 0);
return;
}
if (tx_raw_status & 0x01) {
v4l2_dbg(1, debug, sd, "%s: tx raw: ready ok\n", __func__);
cec_transmit_done(state->cec_adap, CEC_TX_STATUS_OK, 0, 0, 0, 0);
return;
}
}
static void adv7842_cec_isr(struct v4l2_subdev *sd, bool *handled)
{
u8 cec_irq;
/* cec controller */
cec_irq = io_read(sd, 0x93) & 0x0f;
if (!cec_irq)
return;
v4l2_dbg(1, debug, sd, "%s: cec: irq 0x%x\n", __func__, cec_irq);
adv7842_cec_tx_raw_status(sd, cec_irq);
if (cec_irq & 0x08) {
struct adv7842_state *state = to_state(sd);
struct cec_msg msg;
msg.len = cec_read(sd, 0x25) & 0x1f;
if (msg.len > 16)
msg.len = 16;
if (msg.len) {
u8 i;
for (i = 0; i < msg.len; i++)
msg.msg[i] = cec_read(sd, i + 0x15);
cec_write(sd, 0x26, 0x01); /* re-enable rx */
cec_received_msg(state->cec_adap, &msg);
}
}
io_write(sd, 0x94, cec_irq);
if (handled)
*handled = true;
}
static int adv7842_cec_adap_enable(struct cec_adapter *adap, bool enable)
{
struct adv7842_state *state = adap->priv;
struct v4l2_subdev *sd = &state->sd;
if (!state->cec_enabled_adap && enable) {
cec_write_clr_set(sd, 0x2a, 0x01, 0x01); /* power up cec */
cec_write(sd, 0x2c, 0x01); /* cec soft reset */
cec_write_clr_set(sd, 0x11, 0x01, 0); /* initially disable tx */
/* enabled irqs: */
/* tx: ready */
/* tx: arbitration lost */
/* tx: retry timeout */
/* rx: ready */
io_write_clr_set(sd, 0x96, 0x0f, 0x0f);
cec_write(sd, 0x26, 0x01); /* enable rx */
} else if (state->cec_enabled_adap && !enable) {
/* disable cec interrupts */
io_write_clr_set(sd, 0x96, 0x0f, 0x00);
/* disable address mask 1-3 */
cec_write_clr_set(sd, 0x27, 0x70, 0x00);
/* power down cec section */
cec_write_clr_set(sd, 0x2a, 0x01, 0x00);
state->cec_valid_addrs = 0;
}
state->cec_enabled_adap = enable;
return 0;
}
static int adv7842_cec_adap_log_addr(struct cec_adapter *adap, u8 addr)
{
struct adv7842_state *state = adap->priv;
struct v4l2_subdev *sd = &state->sd;
unsigned int i, free_idx = ADV7842_MAX_ADDRS;
if (!state->cec_enabled_adap)
return addr == CEC_LOG_ADDR_INVALID ? 0 : -EIO;
if (addr == CEC_LOG_ADDR_INVALID) {
cec_write_clr_set(sd, 0x27, 0x70, 0);
state->cec_valid_addrs = 0;
return 0;
}
for (i = 0; i < ADV7842_MAX_ADDRS; i++) {
bool is_valid = state->cec_valid_addrs & (1 << i);
if (free_idx == ADV7842_MAX_ADDRS && !is_valid)
free_idx = i;
if (is_valid && state->cec_addr[i] == addr)
return 0;
}
if (i == ADV7842_MAX_ADDRS) {
i = free_idx;
if (i == ADV7842_MAX_ADDRS)
return -ENXIO;
}
state->cec_addr[i] = addr;
state->cec_valid_addrs |= 1 << i;
switch (i) {
case 0:
/* enable address mask 0 */
cec_write_clr_set(sd, 0x27, 0x10, 0x10);
/* set address for mask 0 */
cec_write_clr_set(sd, 0x28, 0x0f, addr);
break;
case 1:
/* enable address mask 1 */
cec_write_clr_set(sd, 0x27, 0x20, 0x20);
/* set address for mask 1 */
cec_write_clr_set(sd, 0x28, 0xf0, addr << 4);
break;
case 2:
/* enable address mask 2 */
cec_write_clr_set(sd, 0x27, 0x40, 0x40);
/* set address for mask 1 */
cec_write_clr_set(sd, 0x29, 0x0f, addr);
break;
}
return 0;
}
static int adv7842_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
u32 signal_free_time, struct cec_msg *msg)
{
struct adv7842_state *state = adap->priv;
struct v4l2_subdev *sd = &state->sd;
u8 len = msg->len;
unsigned int i;
/*
* The number of retries is the number of attempts - 1, but retry
* at least once. It's not clear if a value of 0 is allowed, so
* let's do at least one retry.
*/
cec_write_clr_set(sd, 0x12, 0x70, max(1, attempts - 1) << 4);
if (len > 16) {
v4l2_err(sd, "%s: len exceeded 16 (%d)\n", __func__, len);
return -EINVAL;
}
/* write data */
for (i = 0; i < len; i++)
cec_write(sd, i, msg->msg[i]);
/* set length (data + header) */
cec_write(sd, 0x10, len);
/* start transmit, enable tx */
cec_write(sd, 0x11, 0x01);
return 0;
}
static const struct cec_adap_ops adv7842_cec_adap_ops = {
.adap_enable = adv7842_cec_adap_enable,
.adap_log_addr = adv7842_cec_adap_log_addr,
.adap_transmit = adv7842_cec_adap_transmit,
};
#endif
static int adv7842_isr(struct v4l2_subdev *sd, u32 status, bool *handled)
{
struct adv7842_state *state = to_state(sd);
@ -2238,6 +2428,11 @@ static int adv7842_isr(struct v4l2_subdev *sd, u32 status, bool *handled)
*handled = true;
}
#if IS_ENABLED(CONFIG_VIDEO_ADV7842_CEC)
/* cec */
adv7842_cec_isr(sd, handled);
#endif
/* tx 5v detect */
if (irq_status[2] & 0x3) {
v4l2_dbg(1, debug, sd, "%s: irq tx_5v\n", __func__);
@ -2318,10 +2513,12 @@ static int adv7842_set_edid(struct v4l2_subdev *sd, struct v4l2_edid *e)
case ADV7842_EDID_PORT_A:
case ADV7842_EDID_PORT_B:
memset(&state->hdmi_edid.edid, 0, 256);
if (e->blocks)
if (e->blocks) {
state->hdmi_edid.present |= 0x04 << e->pad;
else
} else {
state->hdmi_edid.present &= ~(0x04 << e->pad);
adv7842_s_detect_tx_5v_ctrl(sd);
}
memcpy(&state->hdmi_edid.edid, e->edid, 128 * e->blocks);
err = edid_write_hdmi_segment(sd, e->pad);
break;
@ -2509,8 +2706,19 @@ static int adv7842_cp_log_status(struct v4l2_subdev *sd)
v4l2_info(sd, "HPD A %s, B %s\n",
reg_io_0x21 & 0x02 ? "enabled" : "disabled",
reg_io_0x21 & 0x01 ? "enabled" : "disabled");
v4l2_info(sd, "CEC %s\n", !!(cec_read(sd, 0x2a) & 0x01) ?
v4l2_info(sd, "CEC: %s\n", state->cec_enabled_adap ?
"enabled" : "disabled");
if (state->cec_enabled_adap) {
int i;
for (i = 0; i < ADV7842_MAX_ADDRS; i++) {
bool is_valid = state->cec_valid_addrs & (1 << i);
if (is_valid)
v4l2_info(sd, "CEC Logical Address: 0x%x\n",
state->cec_addr[i]);
}
}
v4l2_info(sd, "-----Signal status-----\n");
if (state->hdmi_port_a) {
@ -3031,6 +3239,24 @@ static int adv7842_subscribe_event(struct v4l2_subdev *sd,
}
}
static int adv7842_registered(struct v4l2_subdev *sd)
{
struct adv7842_state *state = to_state(sd);
int err;
err = cec_register_adapter(state->cec_adap);
if (err)
cec_delete_adapter(state->cec_adap);
return err;
}
static void adv7842_unregistered(struct v4l2_subdev *sd)
{
struct adv7842_state *state = to_state(sd);
cec_unregister_adapter(state->cec_adap);
}
/* ----------------------------------------------------------------------- */
static const struct v4l2_ctrl_ops adv7842_ctrl_ops = {
@ -3077,6 +3303,11 @@ static const struct v4l2_subdev_ops adv7842_ops = {
.pad = &adv7842_pad_ops,
};
static const struct v4l2_subdev_internal_ops adv7842_int_ops = {
.registered = adv7842_registered,
.unregistered = adv7842_unregistered,
};
/* -------------------------- custom ctrls ---------------------------------- */
static const struct v4l2_ctrl_config adv7842_ctrl_analog_sampling_phase = {
@ -3241,6 +3472,7 @@ static int adv7842_probe(struct i2c_client *client,
sd = &state->sd;
v4l2_i2c_subdev_init(sd, client, &adv7842_ops);
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
sd->internal_ops = &adv7842_int_ops;
state->mode = pdata->mode;
state->hdmi_port_a = pdata->input == ADV7842_SELECT_HDMI_PORT_A;
@ -3324,6 +3556,17 @@ static int adv7842_probe(struct i2c_client *client,
if (err)
goto err_entity;
#if IS_ENABLED(CONFIG_VIDEO_ADV7842_CEC)
state->cec_adap = cec_allocate_adapter(&adv7842_cec_adap_ops,
state, dev_name(&client->dev),
CEC_CAP_TRANSMIT | CEC_CAP_LOG_ADDRS |
CEC_CAP_PASSTHROUGH | CEC_CAP_RC, ADV7842_MAX_ADDRS,
&client->dev);
err = PTR_ERR_OR_ZERO(state->cec_adap);
if (err)
goto err_entity;
#endif
v4l2_info(sd, "%s found @ 0x%x (%s)\n", client->name,
client->addr << 1, client->adapter->name);
return 0;
@ -3347,7 +3590,6 @@ static int adv7842_remove(struct i2c_client *client)
struct adv7842_state *state = to_state(sd);
adv7842_irq_enable(sd, false);
cancel_delayed_work(&state->delayed_work_enable_hotplug);
v4l2_device_unregister_subdev(sd);
media_entity_cleanup(&sd->entity);

8
drivers/media/platform/vivid/Kconfig
View File

@ -6,6 +6,7 @@ config VIDEO_VIVID
select FB_CFB_FILLRECT
select FB_CFB_COPYAREA
select FB_CFB_IMAGEBLIT
select MEDIA_CEC_EDID
select VIDEOBUF2_VMALLOC
select VIDEO_V4L2_TPG
default n
@ -22,6 +23,13 @@ config VIDEO_VIVID
Say Y here if you want to test video apps or debug V4L devices.
When in doubt, say N.
config VIDEO_VIVID_CEC
bool "Enable CEC emulation support"
depends on VIDEO_VIVID && MEDIA_CEC
---help---
When selected the vivid module will emulate the optional
HDMI CEC feature.
config VIDEO_VIVID_MAX_DEVS
int "Maximum number of devices"
depends on VIDEO_VIVID

4
drivers/media/platform/vivid/Makefile
View File

@ -3,4 +3,8 @@ vivid-objs := vivid-core.o vivid-ctrls.o vivid-vid-common.o vivid-vbi-gen.o \
vivid-radio-rx.o vivid-radio-tx.o vivid-radio-common.o \
vivid-rds-gen.o vivid-sdr-cap.o vivid-vbi-cap.o vivid-vbi-out.o \
vivid-osd.o
ifeq ($(CONFIG_VIDEO_VIVID_CEC),y)
vivid-objs += vivid-cec.o
endif
obj-$(CONFIG_VIDEO_VIVID) += vivid.o

255
drivers/media/platform/vivid/vivid-cec.c Normal file
View File

@ -0,0 +1,255 @@
/*
* vivid-cec.c - A Virtual Video Test Driver, cec emulation
*
* Copyright 2016 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <media/cec.h>
#include "vivid-core.h"
#include "vivid-cec.h"
void vivid_cec_bus_free_work(struct vivid_dev *dev)
{
spin_lock(&dev->cec_slock);
while (!list_empty(&dev->cec_work_list)) {
struct vivid_cec_work *cw =
list_first_entry(&dev->cec_work_list,
struct vivid_cec_work, list);
spin_unlock(&dev->cec_slock);
cancel_delayed_work_sync(&cw->work);
spin_lock(&dev->cec_slock);
list_del(&cw->list);
cec_transmit_done(cw->adap, CEC_TX_STATUS_LOW_DRIVE, 0, 0, 1, 0);
kfree(cw);
}
spin_unlock(&dev->cec_slock);
}
static struct cec_adapter *vivid_cec_find_dest_adap(struct vivid_dev *dev,
struct cec_adapter *adap,
u8 dest)
{
unsigned int i;
if (dest >= 0xf)
return NULL;
if (adap != dev->cec_rx_adap && dev->cec_rx_adap &&
dev->cec_rx_adap->is_configured &&
cec_has_log_addr(dev->cec_rx_adap, dest))
return dev->cec_rx_adap;
for (i = 0; i < MAX_OUTPUTS && dev->cec_tx_adap[i]; i++) {
if (adap == dev->cec_tx_adap[i])
continue;
if (!dev->cec_tx_adap[i]->is_configured)
continue;
if (cec_has_log_addr(dev->cec_tx_adap[i], dest))
return dev->cec_tx_adap[i];
}
return NULL;
}
static void vivid_cec_xfer_done_worker(struct work_struct *work)
{
struct vivid_cec_work *cw =
container_of(work, struct vivid_cec_work, work.work);
struct vivid_dev *dev = cw->dev;
struct cec_adapter *adap = cw->adap;
bool is_poll = cw->msg.len == 1;
u8 dest = cec_msg_destination(&cw->msg);
struct cec_adapter *dest_adap = NULL;
bool valid_dest;
unsigned int i;
valid_dest = cec_msg_is_broadcast(&cw->msg);
if (!valid_dest) {
dest_adap = vivid_cec_find_dest_adap(dev, adap, dest);
if (dest_adap)
valid_dest = true;
}
cw->tx_status = valid_dest ? CEC_TX_STATUS_OK : CEC_TX_STATUS_NACK;
spin_lock(&dev->cec_slock);
dev->cec_xfer_time_jiffies = 0;
dev->cec_xfer_start_jiffies = 0;
list_del(&cw->list);
spin_unlock(&dev->cec_slock);
cec_transmit_done(cw->adap, cw->tx_status, 0, valid_dest ? 0 : 1, 0, 0);
if (!is_poll && dest_adap) {
/* Directed message */
cec_received_msg(dest_adap, &cw->msg);
} else if (!is_poll && valid_dest) {
/* Broadcast message */
if (adap != dev->cec_rx_adap &&
dev->cec_rx_adap->log_addrs.log_addr_mask)
cec_received_msg(dev->cec_rx_adap, &cw->msg);
for (i = 0; i < MAX_OUTPUTS && dev->cec_tx_adap[i]; i++) {
if (adap == dev->cec_tx_adap[i] ||
!dev->cec_tx_adap[i]->log_addrs.log_addr_mask)
continue;
cec_received_msg(dev->cec_tx_adap[i], &cw->msg);
}
}
kfree(cw);
}
static void vivid_cec_xfer_try_worker(struct work_struct *work)
{
struct vivid_cec_work *cw =
container_of(work, struct vivid_cec_work, work.work);
struct vivid_dev *dev = cw->dev;
spin_lock(&dev->cec_slock);
if (dev->cec_xfer_time_jiffies) {
list_del(&cw->list);
spin_unlock(&dev->cec_slock);
cec_transmit_done(cw->adap, CEC_TX_STATUS_ARB_LOST, 1, 0, 0, 0);
kfree(cw);
} else {
INIT_DELAYED_WORK(&cw->work, vivid_cec_xfer_done_worker);
dev->cec_xfer_start_jiffies = jiffies;
dev->cec_xfer_time_jiffies = usecs_to_jiffies(cw->usecs);
spin_unlock(&dev->cec_slock);
schedule_delayed_work(&cw->work, dev->cec_xfer_time_jiffies);
}
}
static int vivid_cec_adap_enable(struct cec_adapter *adap, bool enable)
{
return 0;
}
static int vivid_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr)
{
return 0;
}
/*
* One data bit takes 2400 us, each byte needs 10 bits so that's 24000 us
* per byte.
*/
#define USECS_PER_BYTE 24000
static int vivid_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
u32 signal_free_time, struct cec_msg *msg)
{
struct vivid_dev *dev = adap->priv;
struct vivid_cec_work *cw = kzalloc(sizeof(*cw), GFP_KERNEL);
long delta_jiffies = 0;
if (cw == NULL)
return -ENOMEM;
cw->dev = dev;
cw->adap = adap;
cw->usecs = CEC_FREE_TIME_TO_USEC(signal_free_time) +
msg->len * USECS_PER_BYTE;
cw->msg = *msg;
spin_lock(&dev->cec_slock);
list_add(&cw->list, &dev->cec_work_list);
if (dev->cec_xfer_time_jiffies == 0) {
INIT_DELAYED_WORK(&cw->work, vivid_cec_xfer_done_worker);
dev->cec_xfer_start_jiffies = jiffies;
dev->cec_xfer_time_jiffies = usecs_to_jiffies(cw->usecs);
delta_jiffies = dev->cec_xfer_time_jiffies;
} else {
INIT_DELAYED_WORK(&cw->work, vivid_cec_xfer_try_worker);
delta_jiffies = dev->cec_xfer_start_jiffies +
dev->cec_xfer_time_jiffies - jiffies;
}
spin_unlock(&dev->cec_slock);
schedule_delayed_work(&cw->work, delta_jiffies < 0 ? 0 : delta_jiffies);
return 0;
}
static int vivid_received(struct cec_adapter *adap, struct cec_msg *msg)
{
struct vivid_dev *dev = adap->priv;
struct cec_msg reply;
u8 dest = cec_msg_destination(msg);
u16 pa;
u8 disp_ctl;
char osd[14];
if (cec_msg_is_broadcast(msg))
dest = adap->log_addrs.log_addr[0];
cec_msg_init(&reply, dest, cec_msg_initiator(msg));
switch (cec_msg_opcode(msg)) {
case CEC_MSG_SET_STREAM_PATH:
if (cec_is_sink(adap))
return -ENOMSG;
cec_ops_set_stream_path(msg, &pa);
if (pa != adap->phys_addr)
return -ENOMSG;
cec_msg_active_source(&reply, adap->phys_addr);
cec_transmit_msg(adap, &reply, false);
break;
case CEC_MSG_SET_OSD_STRING:
if (!cec_is_sink(adap))
return -ENOMSG;
cec_ops_set_osd_string(msg, &disp_ctl, osd);
switch (disp_ctl) {
case CEC_OP_DISP_CTL_DEFAULT:
strcpy(dev->osd, osd);
dev->osd_jiffies = jiffies;
break;
case CEC_OP_DISP_CTL_UNTIL_CLEARED:
strcpy(dev->osd, osd);
dev->osd_jiffies = 0;
break;
case CEC_OP_DISP_CTL_CLEAR:
dev->osd[0] = 0;
dev->osd_jiffies = 0;
break;
default:
cec_msg_feature_abort(&reply, cec_msg_opcode(msg),
CEC_OP_ABORT_INVALID_OP);
cec_transmit_msg(adap, &reply, false);
break;
}
break;
default:
return -ENOMSG;
}
return 0;
}
static const struct cec_adap_ops vivid_cec_adap_ops = {
.adap_enable = vivid_cec_adap_enable,
.adap_log_addr = vivid_cec_adap_log_addr,
.adap_transmit = vivid_cec_adap_transmit,
.received = vivid_received,
};
struct cec_adapter *vivid_cec_alloc_adap(struct vivid_dev *dev,
unsigned int idx,
struct device *parent,
bool is_source)
{
char name[sizeof(dev->vid_out_dev.name) + 2];
u32 caps = CEC_CAP_TRANSMIT | CEC_CAP_LOG_ADDRS |
CEC_CAP_PASSTHROUGH | CEC_CAP_RC;
snprintf(name, sizeof(name), "%s%d",
is_source ? dev->vid_out_dev.name : dev->vid_cap_dev.name,
idx);
return cec_allocate_adapter(&vivid_cec_adap_ops, dev,
name, caps, 1, parent);
}

33
drivers/media/platform/vivid/vivid-cec.h Normal file
View File

@ -0,0 +1,33 @@
/*
* vivid-cec.h - A Virtual Video Test Driver, cec emulation
*
* Copyright 2016 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifdef CONFIG_VIDEO_VIVID_CEC
struct cec_adapter *vivid_cec_alloc_adap(struct vivid_dev *dev,
unsigned int idx,
struct device *parent,
bool is_source);
void vivid_cec_bus_free_work(struct vivid_dev *dev);
#else
static inline void vivid_cec_bus_free_work(struct vivid_dev *dev)
{
}
#endif

118
drivers/media/platform/vivid/vivid-core.c
View File

@ -46,6 +46,7 @@
#include "vivid-vbi-cap.h"
#include "vivid-vbi-out.h"
#include "vivid-osd.h"
#include "vivid-cec.h"
#include "vivid-ctrls.h"
#define VIVID_MODULE_NAME "vivid"
@ -684,6 +685,11 @@ static int vivid_create_instance(struct platform_device *pdev, int inst)
dev->input_name_counter[i] = in_type_counter[dev->input_type[i]]++;
}
dev->has_audio_inputs = in_type_counter[TV] && in_type_counter[SVID];
if (in_type_counter[HDMI] == 16) {
/* The CEC physical address only allows for max 15 inputs */
in_type_counter[HDMI]--;
dev->num_inputs--;
}
/* how many outputs do we have and of what type? */
dev->num_outputs = num_outputs[inst];
@ -696,6 +702,15 @@ static int vivid_create_instance(struct platform_device *pdev, int inst)
dev->output_name_counter[i] = out_type_counter[dev->output_type[i]]++;
}
dev->has_audio_outputs = out_type_counter[SVID];
if (out_type_counter[HDMI] == 16) {
/*
* The CEC physical address only allows for max 15 inputs,
* so outputs are also limited to 15 to allow for easy
* CEC output to input mapping.
*/
out_type_counter[HDMI]--;
dev->num_outputs--;
}
/* do we create a video capture device? */
dev->has_vid_cap = node_type & 0x0001;
@ -1010,6 +1025,17 @@ static int vivid_create_instance(struct platform_device *pdev, int inst)
INIT_LIST_HEAD(&dev->vbi_out_active);
INIT_LIST_HEAD(&dev->sdr_cap_active);
INIT_LIST_HEAD(&dev->cec_work_list);
spin_lock_init(&dev->cec_slock);
/*
* Same as create_singlethread_workqueue, but now I can use the
* string formatting of alloc_ordered_workqueue.
*/
dev->cec_workqueue =
alloc_ordered_workqueue("vivid-%03d-cec", WQ_MEM_RECLAIM, inst);
if (!dev->cec_workqueue)
goto unreg_dev;
/* start creating the vb2 queues */
if (dev->has_vid_cap) {
/* initialize vid_cap queue */
@ -1117,7 +1143,8 @@ static int vivid_create_instance(struct platform_device *pdev, int inst)
/* finally start creating the device nodes */
if (dev->has_vid_cap) {
vfd = &dev->vid_cap_dev;
strlcpy(vfd->name, "vivid-vid-cap", sizeof(vfd->name));
snprintf(vfd->name, sizeof(vfd->name),
"vivid-%03d-vid-cap", inst);
vfd->fops = &vivid_fops;
vfd->ioctl_ops = &vivid_ioctl_ops;
vfd->device_caps = dev->vid_cap_caps;
@ -1133,6 +1160,27 @@ static int vivid_create_instance(struct platform_device *pdev, int inst)
vfd->lock = &dev->mutex;
video_set_drvdata(vfd, dev);
#ifdef CONFIG_VIDEO_VIVID_CEC
if (in_type_counter[HDMI]) {
struct cec_adapter *adap;
adap = vivid_cec_alloc_adap(dev, 0, &pdev->dev, false);
ret = PTR_ERR_OR_ZERO(adap);
if (ret < 0)
goto unreg_dev;
dev->cec_rx_adap = adap;
ret = cec_register_adapter(adap);
if (ret < 0) {
cec_delete_adapter(adap);
dev->cec_rx_adap = NULL;
goto unreg_dev;
}
cec_s_phys_addr(adap, 0, false);
v4l2_info(&dev->v4l2_dev, "CEC adapter %s registered for HDMI input %d\n",
dev_name(&adap->devnode.dev), i);
}
#endif
ret = video_register_device(vfd, VFL_TYPE_GRABBER, vid_cap_nr[inst]);
if (ret < 0)
goto unreg_dev;
@ -1141,8 +1189,13 @@ static int vivid_create_instance(struct platform_device *pdev, int inst)
}
if (dev->has_vid_out) {
#ifdef CONFIG_VIDEO_VIVID_CEC
unsigned int bus_cnt = 0;
#endif
vfd = &dev->vid_out_dev;
strlcpy(vfd->name, "vivid-vid-out", sizeof(vfd->name));
snprintf(vfd->name, sizeof(vfd->name),
"vivid-%03d-vid-out", inst);
vfd->vfl_dir = VFL_DIR_TX;
vfd->fops = &vivid_fops;
vfd->ioctl_ops = &vivid_ioctl_ops;
@ -1159,6 +1212,35 @@ static int vivid_create_instance(struct platform_device *pdev, int inst)
vfd->lock = &dev->mutex;
video_set_drvdata(vfd, dev);
#ifdef CONFIG_VIDEO_VIVID_CEC
for (i = 0; i < dev->num_outputs; i++) {
struct cec_adapter *adap;
if (dev->output_type[i] != HDMI)
continue;
dev->cec_output2bus_map[i] = bus_cnt;
adap = vivid_cec_alloc_adap(dev, bus_cnt,
&pdev->dev, true);
ret = PTR_ERR_OR_ZERO(adap);
if (ret < 0)
goto unreg_dev;
dev->cec_tx_adap[bus_cnt] = adap;
ret = cec_register_adapter(adap);
if (ret < 0) {
cec_delete_adapter(adap);
dev->cec_tx_adap[bus_cnt] = NULL;
goto unreg_dev;
}
bus_cnt++;
if (bus_cnt <= in_type_counter[HDMI])
cec_s_phys_addr(adap, bus_cnt << 12, false);
else
cec_s_phys_addr(adap, 0x1000, false);
v4l2_info(&dev->v4l2_dev, "CEC adapter %s registered for HDMI output %d\n",
dev_name(&adap->devnode.dev), i);
}
#endif
ret = video_register_device(vfd, VFL_TYPE_GRABBER, vid_out_nr[inst]);
if (ret < 0)
goto unreg_dev;
@ -1168,7 +1250,8 @@ static int vivid_create_instance(struct platform_device *pdev, int inst)
if (dev->has_vbi_cap) {
vfd = &dev->vbi_cap_dev;
strlcpy(vfd->name, "vivid-vbi-cap", sizeof(vfd->name));
snprintf(vfd->name, sizeof(vfd->name),
"vivid-%03d-vbi-cap", inst);
vfd->fops = &vivid_fops;
vfd->ioctl_ops = &vivid_ioctl_ops;
vfd->device_caps = dev->vbi_cap_caps;
@ -1191,7 +1274,8 @@ static int vivid_create_instance(struct platform_device *pdev, int inst)
if (dev->has_vbi_out) {
vfd = &dev->vbi_out_dev;
strlcpy(vfd->name, "vivid-vbi-out", sizeof(vfd->name));
snprintf(vfd->name, sizeof(vfd->name),
"vivid-%03d-vbi-out", inst);
vfd->vfl_dir = VFL_DIR_TX;
vfd->fops = &vivid_fops;
vfd->ioctl_ops = &vivid_ioctl_ops;
@ -1215,7 +1299,8 @@ static int vivid_create_instance(struct platform_device *pdev, int inst)
if (dev->has_sdr_cap) {
vfd = &dev->sdr_cap_dev;
strlcpy(vfd->name, "vivid-sdr-cap", sizeof(vfd->name));
snprintf(vfd->name, sizeof(vfd->name),
"vivid-%03d-sdr-cap", inst);
vfd->fops = &vivid_fops;
vfd->ioctl_ops = &vivid_ioctl_ops;
vfd->device_caps = dev->sdr_cap_caps;
@ -1234,7 +1319,8 @@ static int vivid_create_instance(struct platform_device *pdev, int inst)
if (dev->has_radio_rx) {
vfd = &dev->radio_rx_dev;
strlcpy(vfd->name, "vivid-rad-rx", sizeof(vfd->name));
snprintf(vfd->name, sizeof(vfd->name),
"vivid-%03d-rad-rx", inst);
vfd->fops = &vivid_radio_fops;
vfd->ioctl_ops = &vivid_ioctl_ops;
vfd->device_caps = dev->radio_rx_caps;
@ -1252,7 +1338,8 @@ static int vivid_create_instance(struct platform_device *pdev, int inst)
if (dev->has_radio_tx) {
vfd = &dev->radio_tx_dev;
strlcpy(vfd->name, "vivid-rad-tx", sizeof(vfd->name));
snprintf(vfd->name, sizeof(vfd->name),
"vivid-%03d-rad-tx", inst);
vfd->vfl_dir = VFL_DIR_TX;
vfd->fops = &vivid_radio_fops;
vfd->ioctl_ops = &vivid_ioctl_ops;
@ -1282,6 +1369,13 @@ unreg_dev:
video_unregister_device(&dev->vbi_cap_dev);
video_unregister_device(&dev->vid_out_dev);
video_unregister_device(&dev->vid_cap_dev);
cec_unregister_adapter(dev->cec_rx_adap);
for (i = 0; i < MAX_OUTPUTS; i++)
cec_unregister_adapter(dev->cec_tx_adap[i]);
if (dev->cec_workqueue) {
vivid_cec_bus_free_work(dev);
destroy_workqueue(dev->cec_workqueue);
}
free_dev:
v4l2_device_put(&dev->v4l2_dev);
return ret;
@ -1331,8 +1425,7 @@ static int vivid_probe(struct platform_device *pdev)
static int vivid_remove(struct platform_device *pdev)
{
struct vivid_dev *dev;
unsigned i;
unsigned int i, j;
for (i = 0; i < n_devs; i++) {
dev = vivid_devs[i];
@ -1380,6 +1473,13 @@ static int vivid_remove(struct platform_device *pdev)
unregister_framebuffer(&dev->fb_info);
vivid_fb_release_buffers(dev);
}
cec_unregister_adapter(dev->cec_rx_adap);
for (j = 0; j < MAX_OUTPUTS; j++)
cec_unregister_adapter(dev->cec_tx_adap[j]);
if (dev->cec_workqueue) {
vivid_cec_bus_free_work(dev);
destroy_workqueue(dev->cec_workqueue);
}
v4l2_device_put(&dev->v4l2_dev);
vivid_devs[i] = NULL;
}

27
drivers/media/platform/vivid/vivid-core.h
View File

@ -21,6 +21,8 @@
#define _VIVID_CORE_H_
#include <linux/fb.h>
#include <linux/workqueue.h>
#include <media/cec.h>
#include <media/videobuf2-v4l2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-dev.h>
@ -132,6 +134,17 @@ enum vivid_colorspace {
#define VIVID_INVALID_SIGNAL(mode) \
((mode) == NO_SIGNAL || (mode) == NO_LOCK || (mode) == OUT_OF_RANGE)
struct vivid_cec_work {
struct list_head list;
struct delayed_work work;
struct cec_adapter *adap;
struct vivid_dev *dev;
unsigned int usecs;
unsigned int timeout_ms;
u8 tx_status;
struct cec_msg msg;
};
struct vivid_dev {
unsigned inst;
struct v4l2_device v4l2_dev;
@ -497,6 +510,20 @@ struct vivid_dev {
/* Shared between radio receiver and transmitter */
bool radio_rds_loop;
struct timespec radio_rds_init_ts;
/* CEC */
struct cec_adapter *cec_rx_adap;
struct cec_adapter *cec_tx_adap[MAX_OUTPUTS];
struct workqueue_struct *cec_workqueue;
spinlock_t cec_slock;
struct list_head cec_work_list;
unsigned int cec_xfer_time_jiffies;
unsigned long cec_xfer_start_jiffies;
u8 cec_output2bus_map[MAX_OUTPUTS];
/* CEC OSD String */
char osd[14];
unsigned long osd_jiffies;
};
static inline bool vivid_is_webcam(const struct vivid_dev *dev)

13
drivers/media/platform/vivid/vivid-kthread-cap.c
View File

@ -552,6 +552,19 @@ static void vivid_fillbuff(struct vivid_dev *dev, struct vivid_buffer *buf)
snprintf(str, sizeof(str), " button pressed!");
tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
}
if (dev->osd[0]) {
if (vivid_is_hdmi_cap(dev)) {
snprintf(str, sizeof(str),
" OSD \"%s\"", dev->osd);
tpg_gen_text(tpg, basep, line++ * line_height,
16, str);
}
if (dev->osd_jiffies &&
time_is_before_jiffies(dev->osd_jiffies + 5 * HZ)) {
dev->osd[0] = 0;
dev->osd_jiffies = 0;
}
}
}
/*

23
drivers/media/platform/vivid/vivid-vid-cap.c
View File

@ -1695,6 +1695,9 @@ int vidioc_s_edid(struct file *file, void *_fh,
struct v4l2_edid *edid)
{
struct vivid_dev *dev = video_drvdata(file);
u16 phys_addr;
unsigned int i;
int ret;
memset(edid->reserved, 0, sizeof(edid->reserved));
if (edid->pad >= dev->num_inputs)
@ -1703,14 +1706,32 @@ int vidioc_s_edid(struct file *file, void *_fh,
return -EINVAL;
if (edid->blocks == 0) {
dev->edid_blocks = 0;
return 0;
phys_addr = CEC_PHYS_ADDR_INVALID;
goto set_phys_addr;
}
if (edid->blocks > dev->edid_max_blocks) {
edid->blocks = dev->edid_max_blocks;
return -E2BIG;
}
phys_addr = cec_get_edid_phys_addr(edid->edid, edid->blocks * 128, NULL);
ret = cec_phys_addr_validate(phys_addr, &phys_addr, NULL);
if (ret)
return ret;
if (vb2_is_busy(&dev->vb_vid_cap_q))
return -EBUSY;
dev->edid_blocks = edid->blocks;
memcpy(dev->edid, edid->edid, edid->blocks * 128);
set_phys_addr:
/* TODO: a proper hotplug detect cycle should be emulated here */
cec_s_phys_addr(dev->cec_rx_adap, phys_addr, false);
for (i = 0; i < MAX_OUTPUTS && dev->cec_tx_adap[i]; i++)
cec_s_phys_addr(dev->cec_tx_adap[i],
cec_phys_addr_for_input(phys_addr, i + 1),
false);
return 0;
}

7
drivers/media/platform/vivid/vivid-vid-common.c
View File

@ -811,6 +811,7 @@ int vidioc_g_edid(struct file *file, void *_fh,
{
struct vivid_dev *dev = video_drvdata(file);
struct video_device *vdev = video_devdata(file);
struct cec_adapter *adap;
memset(edid->reserved, 0, sizeof(edid->reserved));
if (vdev->vfl_dir == VFL_DIR_RX) {
@ -818,11 +819,16 @@ int vidioc_g_edid(struct file *file, void *_fh,
return -EINVAL;
if (dev->input_type[edid->pad] != HDMI)
return -EINVAL;
adap = dev->cec_rx_adap;
} else {
unsigned int bus_idx;
if (edid->pad >= dev->num_outputs)
return -EINVAL;
if (dev->output_type[edid->pad] != HDMI)
return -EINVAL;
bus_idx = dev->cec_output2bus_map[edid->pad];
adap = dev->cec_tx_adap[bus_idx];
}
if (edid->start_block == 0 && edid->blocks == 0) {
edid->blocks = dev->edid_blocks;
@ -835,5 +841,6 @@ int vidioc_g_edid(struct file *file, void *_fh,
if (edid->start_block + edid->blocks > dev->edid_blocks)
edid->blocks = dev->edid_blocks - edid->start_block;
memcpy(edid->edid, dev->edid, edid->blocks * 128);
cec_set_edid_phys_addr(edid->edid, edid->blocks * 128, adap->phys_addr);
return 0;
}

1
drivers/media/rc/rc-main.c
View File

@ -810,6 +810,7 @@ static const struct {
{ RC_BIT_SHARP, "sharp", "ir-sharp-decoder" },
{ RC_BIT_MCE_KBD, "mce_kbd", "ir-mce_kbd-decoder" },
{ RC_BIT_XMP, "xmp", "ir-xmp-decoder" },
{ RC_BIT_CEC, "cec", NULL },
};
/**

4
drivers/staging/media/Kconfig
View File

@ -21,6 +21,8 @@ if STAGING_MEDIA
# Please keep them in alphabetic order
source "drivers/staging/media/bcm2048/Kconfig"
source "drivers/staging/media/cec/Kconfig"
source "drivers/staging/media/cxd2099/Kconfig"
source "drivers/staging/media/davinci_vpfe/Kconfig"
@ -29,6 +31,8 @@ source "drivers/staging/media/omap4iss/Kconfig"
source "drivers/staging/media/tw686x-kh/Kconfig"
source "drivers/staging/media/s5p-cec/Kconfig"
# Keep LIRC at the end, as it has sub-menus
source "drivers/staging/media/lirc/Kconfig"

2
drivers/staging/media/Makefile
View File

@ -1,4 +1,6 @@
obj-$(CONFIG_I2C_BCM2048) += bcm2048/
obj-$(CONFIG_MEDIA_CEC) += cec/
obj-$(CONFIG_VIDEO_SAMSUNG_S5P_CEC) += s5p-cec/
obj-$(CONFIG_DVB_CXD2099) += cxd2099/
obj-$(CONFIG_LIRC_STAGING) += lirc/
obj-$(CONFIG_VIDEO_DM365_VPFE) += davinci_vpfe/

14
drivers/staging/media/cec/Kconfig Normal file
View File

@ -0,0 +1,14 @@
config MEDIA_CEC
tristate "CEC API (EXPERIMENTAL)"
select MEDIA_CEC_EDID
---help---
Enable the CEC API.
To compile this driver as a module, choose M here: the
module will be called cec.
config MEDIA_CEC_DEBUG
bool "CEC debugfs interface (EXPERIMENTAL)"
depends on MEDIA_CEC && DEBUG_FS
---help---
Turns on the DebugFS interface for CEC devices.

3
drivers/staging/media/cec/Makefile Normal file
View File

@ -0,0 +1,3 @@
cec-objs := cec-core.o cec-adap.o cec-api.o
obj-$(CONFIG_MEDIA_CEC) += cec.o

27
drivers/staging/media/cec/TODO Normal file
View File

@ -0,0 +1,27 @@
The reason why cec.c is still in staging is that I would like
to have a bit more confidence in the uABI. The kABI is fine,
no problem there, but I would like to let the public API mature
a bit.
Once I'm confident that I didn't miss anything then the cec.c source
can move to drivers/media and the linux/cec.h and linux/cec-funcs.h
headers can move to uapi/linux and added to uapi/linux/Kbuild to make
them public.
Hopefully this will happen later in 2016.
Other TODOs:
- Add a flag to inhibit passing CEC RC messages to the rc subsystem.
Applications should be able to choose this when calling S_LOG_ADDRS.
- Convert cec.txt to sphinx.
- If the reply field of cec_msg is set then when the reply arrives it
is only sent to the filehandle that transmitted the original message
and not to any followers. Should this behavior change or perhaps
controlled through a cec_msg flag?
- Should CEC_LOG_ADDR_TYPE_SPECIFIC be replaced by TYPE_2ND_TV and TYPE_PROCESSOR?
And also TYPE_SWITCH and TYPE_CDC_ONLY in addition to the TYPE_UNREGISTERED?
This should give the framework more information about the device type
since SPECIFIC and UNREGISTERED give no useful information.
Hans Verkuil <hans.verkuil@cisco.com>

1627
drivers/staging/media/cec/cec-adap.c Normal file
View File

File diff suppressed because it is too large Load Diff

578
drivers/staging/media/cec/cec-api.c Normal file
View File

@ -0,0 +1,578 @@
/*
* cec-api.c - HDMI Consumer Electronics Control framework - API
*
* Copyright 2016 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/kmod.h>
#include <linux/ktime.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/uaccess.h>
#include <linux/version.h>
#include "cec-priv.h"
static inline struct cec_devnode *cec_devnode_data(struct file *filp)
{
struct cec_fh *fh = filp->private_data;
return &fh->adap->devnode;
}
/* CEC file operations */
static unsigned int cec_poll(struct file *filp,
struct poll_table_struct *poll)
{
struct cec_devnode *devnode = cec_devnode_data(filp);
struct cec_fh *fh = filp->private_data;
struct cec_adapter *adap = fh->adap;
unsigned int res = 0;
if (!devnode->registered)
return POLLERR | POLLHUP;
mutex_lock(&adap->lock);
if (adap->is_configured)
res |= POLLOUT | POLLWRNORM;
if (fh->queued_msgs)
res |= POLLIN | POLLRDNORM;
if (fh->pending_events)
res |= POLLPRI;
poll_wait(filp, &fh->wait, poll);
mutex_unlock(&adap->lock);
return res;
}
static bool cec_is_busy(const struct cec_adapter *adap,
const struct cec_fh *fh)
{
bool valid_initiator = adap->cec_initiator && adap->cec_initiator == fh;
bool valid_follower = adap->cec_follower && adap->cec_follower == fh;
/*
* Exclusive initiators and followers can always access the CEC adapter
*/
if (valid_initiator || valid_follower)
return false;
/*
* All others can only access the CEC adapter if there is no
* exclusive initiator and they are in INITIATOR mode.
*/
return adap->cec_initiator ||
fh->mode_initiator == CEC_MODE_NO_INITIATOR;
}
static long cec_adap_g_caps(struct cec_adapter *adap,
struct cec_caps __user *parg)
{
struct cec_caps caps = {};
strlcpy(caps.driver, adap->devnode.parent->driver->name,
sizeof(caps.driver));
strlcpy(caps.name, adap->name, sizeof(caps.name));
caps.available_log_addrs = adap->available_log_addrs;
caps.capabilities = adap->capabilities;
caps.version = LINUX_VERSION_CODE;
if (copy_to_user(parg, &caps, sizeof(caps)))
return -EFAULT;
return 0;
}
static long cec_adap_g_phys_addr(struct cec_adapter *adap,
__u16 __user *parg)
{
u16 phys_addr;
mutex_lock(&adap->lock);
phys_addr = adap->phys_addr;
mutex_unlock(&adap->lock);
if (copy_to_user(parg, &phys_addr, sizeof(phys_addr)))
return -EFAULT;
return 0;
}
static long cec_adap_s_phys_addr(struct cec_adapter *adap, struct cec_fh *fh,
bool block, __u16 __user *parg)
{
u16 phys_addr;
long err;
if (!(adap->capabilities & CEC_CAP_PHYS_ADDR))
return -ENOTTY;
if (copy_from_user(&phys_addr, parg, sizeof(phys_addr)))
return -EFAULT;
err = cec_phys_addr_validate(phys_addr, NULL, NULL);
if (err)
return err;
mutex_lock(&adap->lock);
if (cec_is_busy(adap, fh))
err = -EBUSY;
else
__cec_s_phys_addr(adap, phys_addr, block);
mutex_unlock(&adap->lock);
return err;
}
static long cec_adap_g_log_addrs(struct cec_adapter *adap,
struct cec_log_addrs __user *parg)
{
struct cec_log_addrs log_addrs;
mutex_lock(&adap->lock);
log_addrs = adap->log_addrs;
if (!adap->is_configured)
memset(log_addrs.log_addr, CEC_LOG_ADDR_INVALID,
sizeof(log_addrs.log_addr));
mutex_unlock(&adap->lock);
if (copy_to_user(parg, &log_addrs, sizeof(log_addrs)))
return -EFAULT;
return 0;
}
static long cec_adap_s_log_addrs(struct cec_adapter *adap, struct cec_fh *fh,
bool block, struct cec_log_addrs __user *parg)
{
struct cec_log_addrs log_addrs;
long err = -EBUSY;
if (!(adap->capabilities & CEC_CAP_LOG_ADDRS))
return -ENOTTY;
if (copy_from_user(&log_addrs, parg, sizeof(log_addrs)))
return -EFAULT;
log_addrs.flags = 0;
mutex_lock(&adap->lock);
if (!adap->is_configuring &&
(!log_addrs.num_log_addrs || !adap->is_configured) &&
!cec_is_busy(adap, fh)) {
err = __cec_s_log_addrs(adap, &log_addrs, block);
if (!err)
log_addrs = adap->log_addrs;
}
mutex_unlock(&adap->lock);
if (err)
return err;
if (copy_to_user(parg, &log_addrs, sizeof(log_addrs)))
return -EFAULT;
return 0;
}
static long cec_transmit(struct cec_adapter *adap, struct cec_fh *fh,
bool block, struct cec_msg __user *parg)
{
struct cec_msg msg = {};
long err = 0;
if (!(adap->capabilities & CEC_CAP_TRANSMIT))
return -ENOTTY;
if (copy_from_user(&msg, parg, sizeof(msg)))
return -EFAULT;
mutex_lock(&adap->lock);
if (!adap->is_configured) {
err = -ENONET;
} else if (cec_is_busy(adap, fh)) {
err = -EBUSY;
} else {
if (!block || !msg.reply)
fh = NULL;
err = cec_transmit_msg_fh(adap, &msg, fh, block);
}
mutex_unlock(&adap->lock);
if (err)
return err;
if (copy_to_user(parg, &msg, sizeof(msg)))
return -EFAULT;
return 0;
}
/* Called by CEC_RECEIVE: wait for a message to arrive */
static int cec_receive_msg(struct cec_fh *fh, struct cec_msg *msg, bool block)
{
int res;
do {
mutex_lock(&fh->lock);
/* Are there received messages queued up? */
if (fh->queued_msgs) {
/* Yes, return the first one */
struct cec_msg_entry *entry =
list_first_entry(&fh->msgs,
struct cec_msg_entry, list);
list_del(&entry->list);
*msg = entry->msg;
kfree(entry);
fh->queued_msgs--;
mutex_unlock(&fh->lock);
return 0;
}
/* No, return EAGAIN in non-blocking mode or wait */
mutex_unlock(&fh->lock);
/* Return when in non-blocking mode */
if (!block)
return -EAGAIN;
if (msg->timeout) {
/* The user specified a timeout */
res = wait_event_interruptible_timeout(fh->wait,
fh->queued_msgs,
msecs_to_jiffies(msg->timeout));
if (res == 0)
res = -ETIMEDOUT;
else if (res > 0)
res = 0;
} else {
/* Wait indefinitely */
res = wait_event_interruptible(fh->wait,
fh->queued_msgs);
}
/* Exit on error, otherwise loop to get the new message */
} while (!res);
return res;
}
static long cec_receive(struct cec_adapter *adap, struct cec_fh *fh,
bool block, struct cec_msg __user *parg)
{
struct cec_msg msg = {};
long err = 0;
if (copy_from_user(&msg, parg, sizeof(msg)))
return -EFAULT;
mutex_lock(&adap->lock);
if (!adap->is_configured)
err = -ENONET;
mutex_unlock(&adap->lock);
if (err)
return err;
err = cec_receive_msg(fh, &msg, block);
if (err)
return err;
if (copy_to_user(parg, &msg, sizeof(msg)))
return -EFAULT;
return 0;
}
static long cec_dqevent(struct cec_adapter *adap, struct cec_fh *fh,
bool block, struct cec_event __user *parg)
{
struct cec_event *ev = NULL;
u64 ts = ~0ULL;
unsigned int i;
long err = 0;
mutex_lock(&fh->lock);
while (!fh->pending_events && block) {
mutex_unlock(&fh->lock);
err = wait_event_interruptible(fh->wait, fh->pending_events);
if (err)
return err;
mutex_lock(&fh->lock);
}
/* Find the oldest event */
for (i = 0; i < CEC_NUM_EVENTS; i++) {
if (fh->pending_events & (1 << (i + 1)) &&
fh->events[i].ts <= ts) {
ev = &fh->events[i];
ts = ev->ts;
}
}
if (!ev) {
err = -EAGAIN;
goto unlock;
}
if (copy_to_user(parg, ev, sizeof(*ev))) {
err = -EFAULT;
goto unlock;
}
fh->pending_events &= ~(1 << ev->event);
unlock:
mutex_unlock(&fh->lock);
return err;
}
static long cec_g_mode(struct cec_adapter *adap, struct cec_fh *fh,
u32 __user *parg)
{
u32 mode = fh->mode_initiator | fh->mode_follower;
if (copy_to_user(parg, &mode, sizeof(mode)))
return -EFAULT;
return 0;
}
static long cec_s_mode(struct cec_adapter *adap, struct cec_fh *fh,
u32 __user *parg)
{
u32 mode;
u8 mode_initiator;
u8 mode_follower;
long err = 0;
if (copy_from_user(&mode, parg, sizeof(mode)))
return -EFAULT;
if (mode & ~(CEC_MODE_INITIATOR_MSK | CEC_MODE_FOLLOWER_MSK))
return -EINVAL;
mode_initiator = mode & CEC_MODE_INITIATOR_MSK;
mode_follower = mode & CEC_MODE_FOLLOWER_MSK;
if (mode_initiator > CEC_MODE_EXCL_INITIATOR ||
mode_follower > CEC_MODE_MONITOR_ALL)
return -EINVAL;
if (mode_follower == CEC_MODE_MONITOR_ALL &&
!(adap->capabilities & CEC_CAP_MONITOR_ALL))
return -EINVAL;
/* Follower modes should always be able to send CEC messages */
if ((mode_initiator == CEC_MODE_NO_INITIATOR ||
!(adap->capabilities & CEC_CAP_TRANSMIT)) &&
mode_follower >= CEC_MODE_FOLLOWER &&
mode_follower <= CEC_MODE_EXCL_FOLLOWER_PASSTHRU)
return -EINVAL;
/* Monitor modes require CEC_MODE_NO_INITIATOR */
if (mode_initiator && mode_follower >= CEC_MODE_MONITOR)
return -EINVAL;
/* Monitor modes require CAP_NET_ADMIN */
if (mode_follower >= CEC_MODE_MONITOR && !capable(CAP_NET_ADMIN))
return -EPERM;
mutex_lock(&adap->lock);
/*
* You can't become exclusive follower if someone else already
* has that job.
*/
if ((mode_follower == CEC_MODE_EXCL_FOLLOWER ||
mode_follower == CEC_MODE_EXCL_FOLLOWER_PASSTHRU) &&
adap->cec_follower && adap->cec_follower != fh)
err = -EBUSY;
/*
* You can't become exclusive initiator if someone else already
* has that job.
*/
if (mode_initiator == CEC_MODE_EXCL_INITIATOR &&
adap->cec_initiator && adap->cec_initiator != fh)
err = -EBUSY;
if (!err) {
bool old_mon_all = fh->mode_follower == CEC_MODE_MONITOR_ALL;
bool new_mon_all = mode_follower == CEC_MODE_MONITOR_ALL;
if (old_mon_all != new_mon_all) {
if (new_mon_all)
err = cec_monitor_all_cnt_inc(adap);
else
cec_monitor_all_cnt_dec(adap);
}
}
if (err) {
mutex_unlock(&adap->lock);
return err;
}
if (fh->mode_follower == CEC_MODE_FOLLOWER)
adap->follower_cnt--;
if (mode_follower == CEC_MODE_FOLLOWER)
adap->follower_cnt++;
if (mode_follower == CEC_MODE_EXCL_FOLLOWER ||
mode_follower == CEC_MODE_EXCL_FOLLOWER_PASSTHRU) {
adap->passthrough =
mode_follower == CEC_MODE_EXCL_FOLLOWER_PASSTHRU;
adap->cec_follower = fh;
} else if (adap->cec_follower == fh) {
adap->passthrough = false;
adap->cec_follower = NULL;
}
if (mode_initiator == CEC_MODE_EXCL_INITIATOR)
adap->cec_initiator = fh;
else if (adap->cec_initiator == fh)
adap->cec_initiator = NULL;
fh->mode_initiator = mode_initiator;
fh->mode_follower = mode_follower;
mutex_unlock(&adap->lock);
return 0;
}
static long cec_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct cec_devnode *devnode = cec_devnode_data(filp);
struct cec_fh *fh = filp->private_data;
struct cec_adapter *adap = fh->adap;
bool block = !(filp->f_flags & O_NONBLOCK);
void __user *parg = (void __user *)arg;
if (!devnode->registered)
return -EIO;
switch (cmd) {
case CEC_ADAP_G_CAPS:
return cec_adap_g_caps(adap, parg);
case CEC_ADAP_G_PHYS_ADDR:
return cec_adap_g_phys_addr(adap, parg);
case CEC_ADAP_S_PHYS_ADDR:
return cec_adap_s_phys_addr(adap, fh, block, parg);
case CEC_ADAP_G_LOG_ADDRS:
return cec_adap_g_log_addrs(adap, parg);
case CEC_ADAP_S_LOG_ADDRS:
return cec_adap_s_log_addrs(adap, fh, block, parg);
case CEC_TRANSMIT:
return cec_transmit(adap, fh, block, parg);
case CEC_RECEIVE:
return cec_receive(adap, fh, block, parg);
case CEC_DQEVENT:
return cec_dqevent(adap, fh, block, parg);
case CEC_G_MODE:
return cec_g_mode(adap, fh, parg);
case CEC_S_MODE:
return cec_s_mode(adap, fh, parg);
default:
return -ENOTTY;
}
}
static int cec_open(struct inode *inode, struct file *filp)
{
struct cec_devnode *devnode =
container_of(inode->i_cdev, struct cec_devnode, cdev);
struct cec_adapter *adap = to_cec_adapter(devnode);
struct cec_fh *fh = kzalloc(sizeof(*fh), GFP_KERNEL);
/*
* Initial events that are automatically sent when the cec device is
* opened.
*/
struct cec_event ev_state = {
.event = CEC_EVENT_STATE_CHANGE,
.flags = CEC_EVENT_FL_INITIAL_STATE,
};
int err;
if (!fh)
return -ENOMEM;
INIT_LIST_HEAD(&fh->msgs);
INIT_LIST_HEAD(&fh->xfer_list);
mutex_init(&fh->lock);
init_waitqueue_head(&fh->wait);
fh->mode_initiator = CEC_MODE_INITIATOR;
fh->adap = adap;
err = cec_get_device(devnode);
if (err) {
kfree(fh);
return err;
}
filp->private_data = fh;
mutex_lock(&devnode->fhs_lock);
/* Queue up initial state events */
ev_state.state_change.phys_addr = adap->phys_addr;
ev_state.state_change.log_addr_mask = adap->log_addrs.log_addr_mask;
cec_queue_event_fh(fh, &ev_state, 0);
list_add(&fh->list, &devnode->fhs);
mutex_unlock(&devnode->fhs_lock);
return 0;
}
/* Override for the release function */
static int cec_release(struct inode *inode, struct file *filp)
{
struct cec_devnode *devnode = cec_devnode_data(filp);
struct cec_adapter *adap = to_cec_adapter(devnode);
struct cec_fh *fh = filp->private_data;
mutex_lock(&adap->lock);
if (adap->cec_initiator == fh)
adap->cec_initiator = NULL;
if (adap->cec_follower == fh) {
adap->cec_follower = NULL;
adap->passthrough = false;
}
if (fh->mode_follower == CEC_MODE_FOLLOWER)
adap->follower_cnt--;
if (fh->mode_follower == CEC_MODE_MONITOR_ALL)
cec_monitor_all_cnt_dec(adap);
mutex_unlock(&adap->lock);
mutex_lock(&devnode->fhs_lock);
list_del(&fh->list);
mutex_unlock(&devnode->fhs_lock);
/* Unhook pending transmits from this filehandle. */
mutex_lock(&adap->lock);
while (!list_empty(&fh->xfer_list)) {
struct cec_data *data =
list_first_entry(&fh->xfer_list, struct cec_data, xfer_list);
data->blocking = false;
data->fh = NULL;
list_del(&data->xfer_list);
}
mutex_unlock(&adap->lock);
while (!list_empty(&fh->msgs)) {
struct cec_msg_entry *entry =
list_first_entry(&fh->msgs, struct cec_msg_entry, list);
list_del(&entry->list);
kfree(entry);
}
kfree(fh);
cec_put_device(devnode);
filp->private_data = NULL;
return 0;
}
const struct file_operations cec_devnode_fops = {
.owner = THIS_MODULE,
.open = cec_open,
.unlocked_ioctl = cec_ioctl,
.release = cec_release,
.poll = cec_poll,
.llseek = no_llseek,
};

409
drivers/staging/media/cec/cec-core.c Normal file
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/*
* cec-core.c - HDMI Consumer Electronics Control framework - Core
*
* Copyright 2016 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/kmod.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/types.h>
#include "cec-priv.h"
#define CEC_NUM_DEVICES 256
#define CEC_NAME "cec"
int cec_debug;
module_param_named(debug, cec_debug, int, 0644);
MODULE_PARM_DESC(debug, "debug level (0-2)");
static dev_t cec_dev_t;
/* Active devices */
static DEFINE_MUTEX(cec_devnode_lock);
static DECLARE_BITMAP(cec_devnode_nums, CEC_NUM_DEVICES);
static struct dentry *top_cec_dir;
/* dev to cec_devnode */
#define to_cec_devnode(cd) container_of(cd, struct cec_devnode, dev)
int cec_get_device(struct cec_devnode *devnode)
{
/*
* Check if the cec device is available. This needs to be done with
* the cec_devnode_lock held to prevent an open/unregister race:
* without the lock, the device could be unregistered and freed between
* the devnode->registered check and get_device() calls, leading to
* a crash.
*/
mutex_lock(&cec_devnode_lock);
/*
* return ENXIO if the cec device has been removed
* already or if it is not registered anymore.
*/
if (!devnode->registered) {
mutex_unlock(&cec_devnode_lock);
return -ENXIO;
}
/* and increase the device refcount */
get_device(&devnode->dev);
mutex_unlock(&cec_devnode_lock);
return 0;
}
void cec_put_device(struct cec_devnode *devnode)
{
mutex_lock(&cec_devnode_lock);
put_device(&devnode->dev);
mutex_unlock(&cec_devnode_lock);
}
/* Called when the last user of the cec device exits. */
static void cec_devnode_release(struct device *cd)
{
struct cec_devnode *devnode = to_cec_devnode(cd);
mutex_lock(&cec_devnode_lock);
/* Mark device node number as free */
clear_bit(devnode->minor, cec_devnode_nums);
mutex_unlock(&cec_devnode_lock);
cec_delete_adapter(to_cec_adapter(devnode));
}
static struct bus_type cec_bus_type = {
.name = CEC_NAME,
};
/*
* Register a cec device node
*
* The registration code assigns minor numbers and registers the new device node
* with the kernel. An error is returned if no free minor number can be found,
* or if the registration of the device node fails.
*
* Zero is returned on success.
*
* Note that if the cec_devnode_register call fails, the release() callback of
* the cec_devnode structure is *not* called, so the caller is responsible for
* freeing any data.
*/
static int __must_check cec_devnode_register(struct cec_devnode *devnode,
struct module *owner)
{
int minor;
int ret;
/* Initialization */
INIT_LIST_HEAD(&devnode->fhs);
mutex_init(&devnode->fhs_lock);
/* Part 1: Find a free minor number */
mutex_lock(&cec_devnode_lock);
minor = find_next_zero_bit(cec_devnode_nums, CEC_NUM_DEVICES, 0);
if (minor == CEC_NUM_DEVICES) {
mutex_unlock(&cec_devnode_lock);
pr_err("could not get a free minor\n");
return -ENFILE;
}
set_bit(minor, cec_devnode_nums);
mutex_unlock(&cec_devnode_lock);
devnode->minor = minor;
devnode->dev.bus = &cec_bus_type;
devnode->dev.devt = MKDEV(MAJOR(cec_dev_t), minor);
devnode->dev.release = cec_devnode_release;
devnode->dev.parent = devnode->parent;
dev_set_name(&devnode->dev, "cec%d", devnode->minor);
device_initialize(&devnode->dev);
/* Part 2: Initialize and register the character device */
cdev_init(&devnode->cdev, &cec_devnode_fops);
devnode->cdev.kobj.parent = &devnode->dev.kobj;
devnode->cdev.owner = owner;
ret = cdev_add(&devnode->cdev, devnode->dev.devt, 1);
if (ret < 0) {
pr_err("%s: cdev_add failed\n", __func__);
goto clr_bit;
}
ret = device_add(&devnode->dev);
if (ret)
goto cdev_del;
devnode->registered = true;
return 0;
cdev_del:
cdev_del(&devnode->cdev);
clr_bit:
clear_bit(devnode->minor, cec_devnode_nums);
return ret;
}
/*
* Unregister a cec device node
*
* This unregisters the passed device. Future open calls will be met with
* errors.
*
* This function can safely be called if the device node has never been
* registered or has already been unregistered.
*/
static void cec_devnode_unregister(struct cec_devnode *devnode)
{
struct cec_fh *fh;
/* Check if devnode was never registered or already unregistered */
if (!devnode->registered || devnode->unregistered)
return;
mutex_lock(&devnode->fhs_lock);
list_for_each_entry(fh, &devnode->fhs, list)
wake_up_interruptible(&fh->wait);
mutex_unlock(&devnode->fhs_lock);
devnode->registered = false;
devnode->unregistered = true;
device_del(&devnode->dev);
cdev_del(&devnode->cdev);
put_device(&devnode->dev);
}
struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops,
void *priv, const char *name, u32 caps,
u8 available_las, struct device *parent)
{
struct cec_adapter *adap;
int res;
if (WARN_ON(!parent))
return ERR_PTR(-EINVAL);
if (WARN_ON(!caps))
return ERR_PTR(-EINVAL);
if (WARN_ON(!ops))
return ERR_PTR(-EINVAL);
if (WARN_ON(!available_las || available_las > CEC_MAX_LOG_ADDRS))
return ERR_PTR(-EINVAL);
adap = kzalloc(sizeof(*adap), GFP_KERNEL);
if (!adap)
return ERR_PTR(-ENOMEM);
adap->owner = parent->driver->owner;
adap->devnode.parent = parent;
strlcpy(adap->name, name, sizeof(adap->name));
adap->phys_addr = CEC_PHYS_ADDR_INVALID;
adap->log_addrs.cec_version = CEC_OP_CEC_VERSION_2_0;
adap->log_addrs.vendor_id = CEC_VENDOR_ID_NONE;
adap->capabilities = caps;
adap->available_log_addrs = available_las;
adap->sequence = 0;
adap->ops = ops;
adap->priv = priv;
memset(adap->phys_addrs, 0xff, sizeof(adap->phys_addrs));
mutex_init(&adap->lock);
INIT_LIST_HEAD(&adap->transmit_queue);
INIT_LIST_HEAD(&adap->wait_queue);
init_waitqueue_head(&adap->kthread_waitq);
adap->kthread = kthread_run(cec_thread_func, adap, "cec-%s", name);
if (IS_ERR(adap->kthread)) {
pr_err("cec-%s: kernel_thread() failed\n", name);
res = PTR_ERR(adap->kthread);
kfree(adap);
return ERR_PTR(res);
}
if (!(caps & CEC_CAP_RC))
return adap;
#if IS_ENABLED(CONFIG_RC_CORE)
/* Prepare the RC input device */
adap->rc = rc_allocate_device();
if (!adap->rc) {
pr_err("cec-%s: failed to allocate memory for rc_dev\n",
name);
kthread_stop(adap->kthread);
kfree(adap);
return ERR_PTR(-ENOMEM);
}
snprintf(adap->input_name, sizeof(adap->input_name),
"RC for %s", name);
snprintf(adap->input_phys, sizeof(adap->input_phys),
"%s/input0", name);
adap->rc->input_name = adap->input_name;
adap->rc->input_phys = adap->input_phys;
adap->rc->input_id.bustype = BUS_CEC;
adap->rc->input_id.vendor = 0;
adap->rc->input_id.product = 0;
adap->rc->input_id.version = 1;
adap->rc->dev.parent = parent;
adap->rc->driver_type = RC_DRIVER_SCANCODE;
adap->rc->driver_name = CEC_NAME;
adap->rc->allowed_protocols = RC_BIT_CEC;
adap->rc->priv = adap;
adap->rc->map_name = RC_MAP_CEC;
adap->rc->timeout = MS_TO_NS(100);
#else
adap->capabilities &= ~CEC_CAP_RC;
#endif
return adap;
}
EXPORT_SYMBOL_GPL(cec_allocate_adapter);
int cec_register_adapter(struct cec_adapter *adap)
{
int res;
if (IS_ERR_OR_NULL(adap))
return 0;
#if IS_ENABLED(CONFIG_RC_CORE)
if (adap->capabilities & CEC_CAP_RC) {
res = rc_register_device(adap->rc);
if (res) {
pr_err("cec-%s: failed to prepare input device\n",
adap->name);
rc_free_device(adap->rc);
adap->rc = NULL;
return res;
}
}
#endif
res = cec_devnode_register(&adap->devnode, adap->owner);
if (res) {
#if IS_ENABLED(CONFIG_RC_CORE)
/* Note: rc_unregister also calls rc_free */
rc_unregister_device(adap->rc);
adap->rc = NULL;
#endif
return res;
}
dev_set_drvdata(&adap->devnode.dev, adap);
#ifdef CONFIG_MEDIA_CEC_DEBUG
if (!top_cec_dir)
return 0;
adap->cec_dir = debugfs_create_dir(dev_name(&adap->devnode.dev), top_cec_dir);
if (IS_ERR_OR_NULL(adap->cec_dir)) {
pr_warn("cec-%s: Failed to create debugfs dir\n", adap->name);
return 0;
}
adap->status_file = debugfs_create_devm_seqfile(&adap->devnode.dev,
"status", adap->cec_dir, cec_adap_status);
if (IS_ERR_OR_NULL(adap->status_file)) {
pr_warn("cec-%s: Failed to create status file\n", adap->name);
debugfs_remove_recursive(adap->cec_dir);
adap->cec_dir = NULL;
}
#endif
return 0;
}
EXPORT_SYMBOL_GPL(cec_register_adapter);
void cec_unregister_adapter(struct cec_adapter *adap)
{
if (IS_ERR_OR_NULL(adap))
return;
#if IS_ENABLED(CONFIG_RC_CORE)
/* Note: rc_unregister also calls rc_free */
rc_unregister_device(adap->rc);
adap->rc = NULL;
#endif
debugfs_remove_recursive(adap->cec_dir);
cec_devnode_unregister(&adap->devnode);
}
EXPORT_SYMBOL_GPL(cec_unregister_adapter);
void cec_delete_adapter(struct cec_adapter *adap)
{
if (IS_ERR_OR_NULL(adap))
return;
mutex_lock(&adap->lock);
__cec_s_phys_addr(adap, CEC_PHYS_ADDR_INVALID, false);
mutex_unlock(&adap->lock);
kthread_stop(adap->kthread);
if (adap->kthread_config)
kthread_stop(adap->kthread_config);
#if IS_ENABLED(CONFIG_RC_CORE)
if (adap->rc)
rc_free_device(adap->rc);
#endif
kfree(adap);
}
EXPORT_SYMBOL_GPL(cec_delete_adapter);
/*
* Initialise cec for linux
*/
static int __init cec_devnode_init(void)
{
int ret;
pr_info("Linux cec interface: v0.10\n");
ret = alloc_chrdev_region(&cec_dev_t, 0, CEC_NUM_DEVICES,
CEC_NAME);
if (ret < 0) {
pr_warn("cec: unable to allocate major\n");
return ret;
}
#ifdef CONFIG_MEDIA_CEC_DEBUG
top_cec_dir = debugfs_create_dir("cec", NULL);
if (IS_ERR_OR_NULL(top_cec_dir)) {
pr_warn("cec: Failed to create debugfs cec dir\n");
top_cec_dir = NULL;
}
#endif
ret = bus_register(&cec_bus_type);
if (ret < 0) {
unregister_chrdev_region(cec_dev_t, CEC_NUM_DEVICES);
pr_warn("cec: bus_register failed\n");
return -EIO;
}
return 0;
}
static void __exit cec_devnode_exit(void)
{
debugfs_remove_recursive(top_cec_dir);
bus_unregister(&cec_bus_type);
unregister_chrdev_region(cec_dev_t, CEC_NUM_DEVICES);
}
subsys_initcall(cec_devnode_init);
module_exit(cec_devnode_exit)
MODULE_AUTHOR("Hans Verkuil <hans.verkuil@cisco.com>");
MODULE_DESCRIPTION("Device node registration for cec drivers");
MODULE_LICENSE("GPL");

56
drivers/staging/media/cec/cec-priv.h Normal file
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/*
* cec-priv.h - HDMI Consumer Electronics Control internal header
*
* Copyright 2016 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _CEC_PRIV_H
#define _CEC_PRIV_H
#include <linux/cec-funcs.h>
#include <media/cec.h>
#define dprintk(lvl, fmt, arg...) \
do { \
if (lvl <= cec_debug) \
pr_info("cec-%s: " fmt, adap->name, ## arg); \
} while (0)
/* devnode to cec_adapter */
#define to_cec_adapter(node) container_of(node, struct cec_adapter, devnode)
/* cec-core.c */
extern int cec_debug;
int cec_get_device(struct cec_devnode *devnode);
void cec_put_device(struct cec_devnode *devnode);
/* cec-adap.c */
int cec_monitor_all_cnt_inc(struct cec_adapter *adap);
void cec_monitor_all_cnt_dec(struct cec_adapter *adap);
int cec_adap_status(struct seq_file *file, void *priv);
int cec_thread_func(void *_adap);
void __cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr, bool block);
int __cec_s_log_addrs(struct cec_adapter *adap,
struct cec_log_addrs *log_addrs, bool block);
int cec_transmit_msg_fh(struct cec_adapter *adap, struct cec_msg *msg,
struct cec_fh *fh, bool block);
void cec_queue_event_fh(struct cec_fh *fh,
const struct cec_event *new_ev, u64 ts);
/* cec-api.c */
extern const struct file_operations cec_devnode_fops;
#endif

9
drivers/staging/media/s5p-cec/Kconfig Normal file
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config VIDEO_SAMSUNG_S5P_CEC
tristate "Samsung S5P CEC driver"
depends on VIDEO_DEV && MEDIA_CEC && (PLAT_S5P || ARCH_EXYNOS || COMPILE_TEST)
---help---
This is a driver for Samsung S5P HDMI CEC interface. It uses the
generic CEC framework interface.
CEC bus is present in the HDMI connector and enables communication
between compatible devices.

2
drivers/staging/media/s5p-cec/Makefile Normal file
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@ -0,0 +1,2 @@
obj-$(CONFIG_VIDEO_SAMSUNG_S5P_CEC) += s5p-cec.o
s5p-cec-y += s5p_cec.o exynos_hdmi_cecctrl.o

3
drivers/staging/media/s5p-cec/TODO Normal file
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There's nothing wrong on this driver, except that it depends on
the media staging core, that it is currently at staging. So,
this should be kept here while the core is not promoted.

38
drivers/staging/media/s5p-cec/exynos_hdmi_cec.h Normal file
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/* drivers/media/platform/s5p-cec/exynos_hdmi_cec.h
*
* Copyright (c) 2010, 2014 Samsung Electronics
* http://www.samsung.com/
*
* Header file for interface of Samsung Exynos hdmi cec hardware
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _EXYNOS_HDMI_CEC_H_
#define _EXYNOS_HDMI_CEC_H_ __FILE__
#include <linux/regmap.h>
#include <linux/miscdevice.h>
#include "s5p_cec.h"
void s5p_cec_set_divider(struct s5p_cec_dev *cec);
void s5p_cec_enable_rx(struct s5p_cec_dev *cec);
void s5p_cec_mask_rx_interrupts(struct s5p_cec_dev *cec);
void s5p_cec_unmask_rx_interrupts(struct s5p_cec_dev *cec);
void s5p_cec_mask_tx_interrupts(struct s5p_cec_dev *cec);
void s5p_cec_unmask_tx_interrupts(struct s5p_cec_dev *cec);
void s5p_cec_reset(struct s5p_cec_dev *cec);
void s5p_cec_tx_reset(struct s5p_cec_dev *cec);
void s5p_cec_rx_reset(struct s5p_cec_dev *cec);
void s5p_cec_threshold(struct s5p_cec_dev *cec);
void s5p_cec_copy_packet(struct s5p_cec_dev *cec, char *data,
size_t count, u8 retries);
void s5p_cec_set_addr(struct s5p_cec_dev *cec, u32 addr);
u32 s5p_cec_get_status(struct s5p_cec_dev *cec);
void s5p_clr_pending_tx(struct s5p_cec_dev *cec);
void s5p_clr_pending_rx(struct s5p_cec_dev *cec);
void s5p_cec_get_rx_buf(struct s5p_cec_dev *cec, u32 size, u8 *buffer);
#endif /* _EXYNOS_HDMI_CEC_H_ */

209
drivers/staging/media/s5p-cec/exynos_hdmi_cecctrl.c Normal file
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/* drivers/media/platform/s5p-cec/exynos_hdmi_cecctrl.c
*
* Copyright (c) 2009, 2014 Samsung Electronics
* http://www.samsung.com/
*
* cec ftn file for Samsung TVOUT driver
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/io.h>
#include <linux/device.h>
#include "exynos_hdmi_cec.h"
#include "regs-cec.h"
#define S5P_HDMI_FIN 24000000
#define CEC_DIV_RATIO 320000
#define CEC_MESSAGE_BROADCAST_MASK 0x0F
#define CEC_MESSAGE_BROADCAST 0x0F
#define CEC_FILTER_THRESHOLD 0x15
void s5p_cec_set_divider(struct s5p_cec_dev *cec)
{
u32 div_ratio, div_val;
unsigned int reg;
div_ratio = S5P_HDMI_FIN / CEC_DIV_RATIO - 1;
if (regmap_read(cec->pmu, EXYNOS_HDMI_PHY_CONTROL, &reg)) {
dev_err(cec->dev, "failed to read phy control\n");
return;
}
reg = (reg & ~(0x3FF << 16)) | (div_ratio << 16);
if (regmap_write(cec->pmu, EXYNOS_HDMI_PHY_CONTROL, reg)) {
dev_err(cec->dev, "failed to write phy control\n");
return;
}
div_val = CEC_DIV_RATIO * 0.00005 - 1;
writeb(0x0, cec->reg + S5P_CEC_DIVISOR_3);
writeb(0x0, cec->reg + S5P_CEC_DIVISOR_2);
writeb(0x0, cec->reg + S5P_CEC_DIVISOR_1);
writeb(div_val, cec->reg + S5P_CEC_DIVISOR_0);
}
void s5p_cec_enable_rx(struct s5p_cec_dev *cec)
{
u8 reg;
reg = readb(cec->reg + S5P_CEC_RX_CTRL);
reg |= S5P_CEC_RX_CTRL_ENABLE;
writeb(reg, cec->reg + S5P_CEC_RX_CTRL);
}
void s5p_cec_mask_rx_interrupts(struct s5p_cec_dev *cec)
{
u8 reg;
reg = readb(cec->reg + S5P_CEC_IRQ_MASK);
reg |= S5P_CEC_IRQ_RX_DONE;
reg |= S5P_CEC_IRQ_RX_ERROR;
writeb(reg, cec->reg + S5P_CEC_IRQ_MASK);
}
void s5p_cec_unmask_rx_interrupts(struct s5p_cec_dev *cec)
{
u8 reg;
reg = readb(cec->reg + S5P_CEC_IRQ_MASK);
reg &= ~S5P_CEC_IRQ_RX_DONE;
reg &= ~S5P_CEC_IRQ_RX_ERROR;
writeb(reg, cec->reg + S5P_CEC_IRQ_MASK);
}
void s5p_cec_mask_tx_interrupts(struct s5p_cec_dev *cec)
{
u8 reg;
reg = readb(cec->reg + S5P_CEC_IRQ_MASK);
reg |= S5P_CEC_IRQ_TX_DONE;
reg |= S5P_CEC_IRQ_TX_ERROR;
writeb(reg, cec->reg + S5P_CEC_IRQ_MASK);
}
void s5p_cec_unmask_tx_interrupts(struct s5p_cec_dev *cec)
{
u8 reg;
reg = readb(cec->reg + S5P_CEC_IRQ_MASK);
reg &= ~S5P_CEC_IRQ_TX_DONE;
reg &= ~S5P_CEC_IRQ_TX_ERROR;
writeb(reg, cec->reg + S5P_CEC_IRQ_MASK);
}
void s5p_cec_reset(struct s5p_cec_dev *cec)
{
u8 reg;
writeb(S5P_CEC_RX_CTRL_RESET, cec->reg + S5P_CEC_RX_CTRL);
writeb(S5P_CEC_TX_CTRL_RESET, cec->reg + S5P_CEC_TX_CTRL);
reg = readb(cec->reg + 0xc4);
reg &= ~0x1;
writeb(reg, cec->reg + 0xc4);
}
void s5p_cec_tx_reset(struct s5p_cec_dev *cec)
{
writeb(S5P_CEC_TX_CTRL_RESET, cec->reg + S5P_CEC_TX_CTRL);
}
void s5p_cec_rx_reset(struct s5p_cec_dev *cec)
{
u8 reg;
writeb(S5P_CEC_RX_CTRL_RESET, cec->reg + S5P_CEC_RX_CTRL);
reg = readb(cec->reg + 0xc4);
reg &= ~0x1;
writeb(reg, cec->reg + 0xc4);
}
void s5p_cec_threshold(struct s5p_cec_dev *cec)
{
writeb(CEC_FILTER_THRESHOLD, cec->reg + S5P_CEC_RX_FILTER_TH);
writeb(0, cec->reg + S5P_CEC_RX_FILTER_CTRL);
}
void s5p_cec_copy_packet(struct s5p_cec_dev *cec, char *data,
size_t count, u8 retries)
{
int i = 0;
u8 reg;
while (i < count) {
writeb(data[i], cec->reg + (S5P_CEC_TX_BUFF0 + (i * 4)));
i++;
}
writeb(count, cec->reg + S5P_CEC_TX_BYTES);
reg = readb(cec->reg + S5P_CEC_TX_CTRL);
reg |= S5P_CEC_TX_CTRL_START;
reg &= ~0x70;
reg |= retries << 4;
if ((data[0] & CEC_MESSAGE_BROADCAST_MASK) == CEC_MESSAGE_BROADCAST) {
dev_dbg(cec->dev, "Broadcast");
reg |= S5P_CEC_TX_CTRL_BCAST;
} else {
dev_dbg(cec->dev, "No Broadcast");
reg &= ~S5P_CEC_TX_CTRL_BCAST;
}
writeb(reg, cec->reg + S5P_CEC_TX_CTRL);
dev_dbg(cec->dev, "cec-tx: cec count (%zu): %*ph", count,
(int)count, data);
}
void s5p_cec_set_addr(struct s5p_cec_dev *cec, u32 addr)
{
writeb(addr & 0x0F, cec->reg + S5P_CEC_LOGIC_ADDR);
}
u32 s5p_cec_get_status(struct s5p_cec_dev *cec)
{
u32 status = 0;
status = readb(cec->reg + S5P_CEC_STATUS_0);
status |= readb(cec->reg + S5P_CEC_STATUS_1) << 8;
status |= readb(cec->reg + S5P_CEC_STATUS_2) << 16;
status |= readb(cec->reg + S5P_CEC_STATUS_3) << 24;
dev_dbg(cec->dev, "status = 0x%x!\n", status);
return status;
}
void s5p_clr_pending_tx(struct s5p_cec_dev *cec)
{
writeb(S5P_CEC_IRQ_TX_DONE | S5P_CEC_IRQ_TX_ERROR,
cec->reg + S5P_CEC_IRQ_CLEAR);
}
void s5p_clr_pending_rx(struct s5p_cec_dev *cec)
{
writeb(S5P_CEC_IRQ_RX_DONE | S5P_CEC_IRQ_RX_ERROR,
cec->reg + S5P_CEC_IRQ_CLEAR);
}
void s5p_cec_get_rx_buf(struct s5p_cec_dev *cec, u32 size, u8 *buffer)
{
u32 i = 0;
char debug[40];
while (i < size) {
buffer[i] = readb(cec->reg + S5P_CEC_RX_BUFF0 + (i * 4));
sprintf(debug + i * 2, "%02x ", buffer[i]);
i++;
}
dev_dbg(cec->dev, "cec-rx: cec size(%d): %s", size, debug);
}

96
drivers/staging/media/s5p-cec/regs-cec.h Normal file
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@ -0,0 +1,96 @@
/* drivers/media/platform/s5p-cec/regs-cec.h
*
* Copyright (c) 2010 Samsung Electronics
* http://www.samsung.com/
*
* register header file for Samsung TVOUT driver
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __EXYNOS_REGS__H
#define __EXYNOS_REGS__H
/*
* Register part
*/
#define S5P_CEC_STATUS_0 (0x0000)
#define S5P_CEC_STATUS_1 (0x0004)
#define S5P_CEC_STATUS_2 (0x0008)
#define S5P_CEC_STATUS_3 (0x000C)
#define S5P_CEC_IRQ_MASK (0x0010)
#define S5P_CEC_IRQ_CLEAR (0x0014)
#define S5P_CEC_LOGIC_ADDR (0x0020)
#define S5P_CEC_DIVISOR_0 (0x0030)
#define S5P_CEC_DIVISOR_1 (0x0034)
#define S5P_CEC_DIVISOR_2 (0x0038)
#define S5P_CEC_DIVISOR_3 (0x003C)
#define S5P_CEC_TX_CTRL (0x0040)
#define S5P_CEC_TX_BYTES (0x0044)
#define S5P_CEC_TX_STAT0 (0x0060)
#define S5P_CEC_TX_STAT1 (0x0064)
#define S5P_CEC_TX_BUFF0 (0x0080)
#define S5P_CEC_TX_BUFF1 (0x0084)
#define S5P_CEC_TX_BUFF2 (0x0088)
#define S5P_CEC_TX_BUFF3 (0x008C)
#define S5P_CEC_TX_BUFF4 (0x0090)
#define S5P_CEC_TX_BUFF5 (0x0094)
#define S5P_CEC_TX_BUFF6 (0x0098)
#define S5P_CEC_TX_BUFF7 (0x009C)
#define S5P_CEC_TX_BUFF8 (0x00A0)
#define S5P_CEC_TX_BUFF9 (0x00A4)
#define S5P_CEC_TX_BUFF10 (0x00A8)
#define S5P_CEC_TX_BUFF11 (0x00AC)
#define S5P_CEC_TX_BUFF12 (0x00B0)
#define S5P_CEC_TX_BUFF13 (0x00B4)
#define S5P_CEC_TX_BUFF14 (0x00B8)
#define S5P_CEC_TX_BUFF15 (0x00BC)
#define S5P_CEC_RX_CTRL (0x00C0)
#define S5P_CEC_RX_STAT0 (0x00E0)
#define S5P_CEC_RX_STAT1 (0x00E4)
#define S5P_CEC_RX_BUFF0 (0x0100)
#define S5P_CEC_RX_BUFF1 (0x0104)
#define S5P_CEC_RX_BUFF2 (0x0108)
#define S5P_CEC_RX_BUFF3 (0x010C)
#define S5P_CEC_RX_BUFF4 (0x0110)
#define S5P_CEC_RX_BUFF5 (0x0114)
#define S5P_CEC_RX_BUFF6 (0x0118)
#define S5P_CEC_RX_BUFF7 (0x011C)
#define S5P_CEC_RX_BUFF8 (0x0120)
#define S5P_CEC_RX_BUFF9 (0x0124)
#define S5P_CEC_RX_BUFF10 (0x0128)
#define S5P_CEC_RX_BUFF11 (0x012C)
#define S5P_CEC_RX_BUFF12 (0x0130)
#define S5P_CEC_RX_BUFF13 (0x0134)
#define S5P_CEC_RX_BUFF14 (0x0138)
#define S5P_CEC_RX_BUFF15 (0x013C)
#define S5P_CEC_RX_FILTER_CTRL (0x0180)
#define S5P_CEC_RX_FILTER_TH (0x0184)
/*
* Bit definition part
*/
#define S5P_CEC_IRQ_TX_DONE (1<<0)
#define S5P_CEC_IRQ_TX_ERROR (1<<1)
#define S5P_CEC_IRQ_RX_DONE (1<<4)
#define S5P_CEC_IRQ_RX_ERROR (1<<5)
#define S5P_CEC_TX_CTRL_START (1<<0)
#define S5P_CEC_TX_CTRL_BCAST (1<<1)
#define S5P_CEC_TX_CTRL_RETRY (0x04<<4)
#define S5P_CEC_TX_CTRL_RESET (1<<7)
#define S5P_CEC_RX_CTRL_ENABLE (1<<0)
#define S5P_CEC_RX_CTRL_RESET (1<<7)
#define S5P_CEC_LOGIC_ADDR_MASK (0xF)
/* PMU Registers for PHY */
#define EXYNOS_HDMI_PHY_CONTROL 0x700
#endif /* __EXYNOS_REGS__H */

294
drivers/staging/media/s5p-cec/s5p_cec.c Normal file
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@ -0,0 +1,294 @@
/* drivers/media/platform/s5p-cec/s5p_cec.c
*
* Samsung S5P CEC driver
*
* Copyright (c) 2014 Samsung Electronics Co., Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This driver is based on the "cec interface driver for exynos soc" by
* SangPil Moon.
*/
#include <linux/clk.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/timer.h>
#include <linux/version.h>
#include <linux/workqueue.h>
#include <media/cec.h>
#include "exynos_hdmi_cec.h"
#include "regs-cec.h"
#include "s5p_cec.h"
#define CEC_NAME "s5p-cec"
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "debug level (0-2)");
static int s5p_cec_adap_enable(struct cec_adapter *adap, bool enable)
{
struct s5p_cec_dev *cec = adap->priv;
if (enable) {
pm_runtime_get_sync(cec->dev);
s5p_cec_reset(cec);
s5p_cec_set_divider(cec);
s5p_cec_threshold(cec);
s5p_cec_unmask_tx_interrupts(cec);
s5p_cec_unmask_rx_interrupts(cec);
s5p_cec_enable_rx(cec);
} else {
s5p_cec_mask_tx_interrupts(cec);
s5p_cec_mask_rx_interrupts(cec);
pm_runtime_disable(cec->dev);
}
return 0;
}
static int s5p_cec_adap_log_addr(struct cec_adapter *adap, u8 addr)
{
struct s5p_cec_dev *cec = adap->priv;
s5p_cec_set_addr(cec, addr);
return 0;
}
static int s5p_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
u32 signal_free_time, struct cec_msg *msg)
{
struct s5p_cec_dev *cec = adap->priv;
/*
* Unclear if 0 retries are allowed by the hardware, so have 1 as
* the minimum.
*/
s5p_cec_copy_packet(cec, msg->msg, msg->len, max(1, attempts - 1));
return 0;
}
static irqreturn_t s5p_cec_irq_handler(int irq, void *priv)
{
struct s5p_cec_dev *cec = priv;
u32 status = 0;
status = s5p_cec_get_status(cec);
dev_dbg(cec->dev, "irq received\n");
if (status & CEC_STATUS_TX_DONE) {
if (status & CEC_STATUS_TX_ERROR) {
dev_dbg(cec->dev, "CEC_STATUS_TX_ERROR set\n");
cec->tx = STATE_ERROR;
} else {
dev_dbg(cec->dev, "CEC_STATUS_TX_DONE\n");
cec->tx = STATE_DONE;
}
s5p_clr_pending_tx(cec);
}
if (status & CEC_STATUS_RX_DONE) {
if (status & CEC_STATUS_RX_ERROR) {
dev_dbg(cec->dev, "CEC_STATUS_RX_ERROR set\n");
s5p_cec_rx_reset(cec);
s5p_cec_enable_rx(cec);
} else {
dev_dbg(cec->dev, "CEC_STATUS_RX_DONE set\n");
if (cec->rx != STATE_IDLE)
dev_dbg(cec->dev, "Buffer overrun (worker did not process previous message)\n");
cec->rx = STATE_BUSY;
cec->msg.len = status >> 24;
cec->msg.rx_status = CEC_RX_STATUS_OK;
s5p_cec_get_rx_buf(cec, cec->msg.len,
cec->msg.msg);
cec->rx = STATE_DONE;
s5p_cec_enable_rx(cec);
}
/* Clear interrupt pending bit */
s5p_clr_pending_rx(cec);
}
return IRQ_WAKE_THREAD;
}
static irqreturn_t s5p_cec_irq_handler_thread(int irq, void *priv)
{
struct s5p_cec_dev *cec = priv;
dev_dbg(cec->dev, "irq processing thread\n");
switch (cec->tx) {
case STATE_DONE:
cec_transmit_done(cec->adap, CEC_TX_STATUS_OK, 0, 0, 0, 0);
cec->tx = STATE_IDLE;
break;
case STATE_ERROR:
cec_transmit_done(cec->adap,
CEC_TX_STATUS_MAX_RETRIES | CEC_TX_STATUS_ERROR,
0, 0, 0, 1);
cec->tx = STATE_IDLE;
break;
case STATE_BUSY:
dev_err(cec->dev, "state set to busy, this should not occur here\n");
break;
default:
break;
}
switch (cec->rx) {
case STATE_DONE:
cec_received_msg(cec->adap, &cec->msg);
cec->rx = STATE_IDLE;
break;
default:
break;
}
return IRQ_HANDLED;
}
static const struct cec_adap_ops s5p_cec_adap_ops = {
.adap_enable = s5p_cec_adap_enable,
.adap_log_addr = s5p_cec_adap_log_addr,
.adap_transmit = s5p_cec_adap_transmit,
};
static int s5p_cec_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct resource *res;
struct s5p_cec_dev *cec;
int ret;
cec = devm_kzalloc(&pdev->dev, sizeof(*cec), GFP_KERNEL);
if (!dev)
return -ENOMEM;
cec->dev = dev;
cec->irq = platform_get_irq(pdev, 0);
if (cec->irq < 0)
return cec->irq;
ret = devm_request_threaded_irq(dev, cec->irq, s5p_cec_irq_handler,
s5p_cec_irq_handler_thread, 0, pdev->name, cec);
if (ret)
return ret;
cec->clk = devm_clk_get(dev, "hdmicec");
if (IS_ERR(cec->clk))
return PTR_ERR(cec->clk);
cec->pmu = syscon_regmap_lookup_by_phandle(dev->of_node,
"samsung,syscon-phandle");
if (IS_ERR(cec->pmu))
return -EPROBE_DEFER;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
cec->reg = devm_ioremap_resource(dev, res);
if (IS_ERR(cec->reg))
return PTR_ERR(cec->reg);
cec->adap = cec_allocate_adapter(&s5p_cec_adap_ops, cec,
CEC_NAME,
CEC_CAP_PHYS_ADDR | CEC_CAP_LOG_ADDRS | CEC_CAP_TRANSMIT |
CEC_CAP_PASSTHROUGH | CEC_CAP_RC,
1, &pdev->dev);
ret = PTR_ERR_OR_ZERO(cec->adap);
if (ret)
return ret;
ret = cec_register_adapter(cec->adap);
if (ret) {
cec_delete_adapter(cec->adap);
return ret;
}
platform_set_drvdata(pdev, cec);
pm_runtime_enable(dev);
dev_dbg(dev, "successfuly probed\n");
return 0;
}
static int s5p_cec_remove(struct platform_device *pdev)
{
struct s5p_cec_dev *cec = platform_get_drvdata(pdev);
cec_unregister_adapter(cec->adap);
pm_runtime_disable(&pdev->dev);
return 0;
}
static int s5p_cec_runtime_suspend(struct device *dev)
{
struct s5p_cec_dev *cec = dev_get_drvdata(dev);
clk_disable_unprepare(cec->clk);
return 0;
}
static int s5p_cec_runtime_resume(struct device *dev)
{
struct s5p_cec_dev *cec = dev_get_drvdata(dev);
int ret;
ret = clk_prepare_enable(cec->clk);
if (ret < 0)
return ret;
return 0;
}
static int s5p_cec_suspend(struct device *dev)
{
if (pm_runtime_suspended(dev))
return 0;
return s5p_cec_runtime_suspend(dev);
}
static int s5p_cec_resume(struct device *dev)
{
if (pm_runtime_suspended(dev))
return 0;
return s5p_cec_runtime_resume(dev);
}
static const struct dev_pm_ops s5p_cec_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(s5p_cec_suspend, s5p_cec_resume)
SET_RUNTIME_PM_OPS(s5p_cec_runtime_suspend, s5p_cec_runtime_resume,
NULL)
};
static const struct of_device_id s5p_cec_match[] = {
{
.compatible = "samsung,s5p-cec",
},
{},
};
static struct platform_driver s5p_cec_pdrv = {
.probe = s5p_cec_probe,
.remove = s5p_cec_remove,
.driver = {
.name = CEC_NAME,
.of_match_table = s5p_cec_match,
.pm = &s5p_cec_pm_ops,
},
};
module_platform_driver(s5p_cec_pdrv);
MODULE_AUTHOR("Kamil Debski <kamil@wypas.org>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Samsung S5P CEC driver");

76
drivers/staging/media/s5p-cec/s5p_cec.h Normal file
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@ -0,0 +1,76 @@
/* drivers/media/platform/s5p-cec/s5p_cec.h
*
* Samsung S5P HDMI CEC driver
*
* Copyright (c) 2014 Samsung Electronics Co., Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef _S5P_CEC_H_
#define _S5P_CEC_H_ __FILE__
#include <linux/clk.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/timer.h>
#include <linux/version.h>
#include <linux/workqueue.h>
#include <media/cec.h>
#include "exynos_hdmi_cec.h"
#include "regs-cec.h"
#include "s5p_cec.h"
#define CEC_NAME "s5p-cec"
#define CEC_STATUS_TX_RUNNING (1 << 0)
#define CEC_STATUS_TX_TRANSFERRING (1 << 1)
#define CEC_STATUS_TX_DONE (1 << 2)
#define CEC_STATUS_TX_ERROR (1 << 3)
#define CEC_STATUS_TX_BYTES (0xFF << 8)
#define CEC_STATUS_RX_RUNNING (1 << 16)
#define CEC_STATUS_RX_RECEIVING (1 << 17)
#define CEC_STATUS_RX_DONE (1 << 18)
#define CEC_STATUS_RX_ERROR (1 << 19)
#define CEC_STATUS_RX_BCAST (1 << 20)
#define CEC_STATUS_RX_BYTES (0xFF << 24)
#define CEC_WORKER_TX_DONE (1 << 0)
#define CEC_WORKER_RX_MSG (1 << 1)
/* CEC Rx buffer size */
#define CEC_RX_BUFF_SIZE 16
/* CEC Tx buffer size */
#define CEC_TX_BUFF_SIZE 16
enum cec_state {
STATE_IDLE,
STATE_BUSY,
STATE_DONE,
STATE_ERROR
};
struct s5p_cec_dev {
struct cec_adapter *adap;
struct clk *clk;
struct device *dev;
struct mutex lock;
struct regmap *pmu;
int irq;
void __iomem *reg;
enum cec_state rx;
enum cec_state tx;
struct cec_msg msg;
};
#endif /* _S5P_CEC_H_ */

12
fs/compat_ioctl.c
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@ -57,6 +57,7 @@
#include <linux/i2c-dev.h>
#include <linux/atalk.h>
#include <linux/gfp.h>
#include <linux/cec.h>
#include "internal.h"
@ -1377,6 +1378,17 @@ COMPATIBLE_IOCTL(VIDEO_GET_NAVI)
COMPATIBLE_IOCTL(VIDEO_SET_ATTRIBUTES)
COMPATIBLE_IOCTL(VIDEO_GET_SIZE)
COMPATIBLE_IOCTL(VIDEO_GET_FRAME_RATE)
/* cec */
COMPATIBLE_IOCTL(CEC_ADAP_G_CAPS)
COMPATIBLE_IOCTL(CEC_ADAP_G_LOG_ADDRS)
COMPATIBLE_IOCTL(CEC_ADAP_S_LOG_ADDRS)
COMPATIBLE_IOCTL(CEC_ADAP_G_PHYS_ADDR)
COMPATIBLE_IOCTL(CEC_ADAP_S_PHYS_ADDR)
COMPATIBLE_IOCTL(CEC_G_MODE)
COMPATIBLE_IOCTL(CEC_S_MODE)
COMPATIBLE_IOCTL(CEC_TRANSMIT)
COMPATIBLE_IOCTL(CEC_RECEIVE)
COMPATIBLE_IOCTL(CEC_DQEVENT)
/* joystick */
COMPATIBLE_IOCTL(JSIOCGVERSION)

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/*
* cec - HDMI Consumer Electronics Control public header
*
* Copyright 2016 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/*
* Note: this framework is still in staging and it is likely the API
* will change before it goes out of staging.
*
* Once it is moved out of staging this header will move to uapi.
*/
#ifndef _CEC_UAPI_H
#define _CEC_UAPI_H
#include <linux/types.h>
#define CEC_MAX_MSG_SIZE 16
/**
* struct cec_msg - CEC message structure.
* @ts: Timestamp in nanoseconds using CLOCK_MONOTONIC. Set by the
* driver. It is set when the message transmission has finished
* and it is set when a message was received.
* @len: Length in bytes of the message.
* @timeout: The timeout (in ms) that is used to timeout CEC_RECEIVE.
* Set to 0 if you want to wait forever. This timeout can also be
* used with CEC_TRANSMIT as the timeout for waiting for a reply.
* If 0, then it will use a 1 second timeout instead of waiting
* forever as is done with CEC_RECEIVE.
* @sequence: The framework assigns a sequence number to messages that are
* sent. This can be used to track replies to previously sent
* messages.
* @flags: Set to 0.
* @rx_status: The message receive status bits. Set by the driver.
* @tx_status: The message transmit status bits. Set by the driver.
* @msg: The message payload.
* @reply: This field is ignored with CEC_RECEIVE and is only used by
* CEC_TRANSMIT. If non-zero, then wait for a reply with this
* opcode. Set to CEC_MSG_FEATURE_ABORT if you want to wait for
* a possible ABORT reply. If there was an error when sending the
* msg or FeatureAbort was returned, then reply is set to 0.
* If reply is non-zero upon return, then len/msg are set to
* the received message.
* If reply is zero upon return and status has the
* CEC_TX_STATUS_FEATURE_ABORT bit set, then len/msg are set to
* the received feature abort message.
* If reply is zero upon return and status has the
* CEC_TX_STATUS_MAX_RETRIES bit set, then no reply was seen at
* all. If reply is non-zero for CEC_TRANSMIT and the message is a
* broadcast, then -EINVAL is returned.
* if reply is non-zero, then timeout is set to 1000 (the required
* maximum response time).
* @tx_arb_lost_cnt: The number of 'Arbitration Lost' events. Set by the driver.
* @tx_nack_cnt: The number of 'Not Acknowledged' events. Set by the driver.
* @tx_low_drive_cnt: The number of 'Low Drive Detected' events. Set by the
* driver.
* @tx_error_cnt: The number of 'Error' events. Set by the driver.
*/
struct cec_msg {
__u64 ts;
__u32 len;
__u32 timeout;
__u32 sequence;
__u32 flags;
__u8 rx_status;
__u8 tx_status;
__u8 msg[CEC_MAX_MSG_SIZE];
__u8 reply;
__u8 tx_arb_lost_cnt;
__u8 tx_nack_cnt;
__u8 tx_low_drive_cnt;
__u8 tx_error_cnt;
};
/**
* cec_msg_initiator - return the initiator's logical address.
* @msg: the message structure
*/
static inline __u8 cec_msg_initiator(const struct cec_msg *msg)
{
return msg->msg[0] >> 4;
}
/**
* cec_msg_destination - return the destination's logical address.
* @msg: the message structure
*/
static inline __u8 cec_msg_destination(const struct cec_msg *msg)
{
return msg->msg[0] & 0xf;
}
/**
* cec_msg_opcode - return the opcode of the message, -1 for poll
* @msg: the message structure
*/
static inline int cec_msg_opcode(const struct cec_msg *msg)
{
return msg->len > 1 ? msg->msg[1] : -1;
}
/**
* cec_msg_is_broadcast - return true if this is a broadcast message.
* @msg: the message structure
*/
static inline bool cec_msg_is_broadcast(const struct cec_msg *msg)
{
return (msg->msg[0] & 0xf) == 0xf;
}
/**
* cec_msg_init - initialize the message structure.
* @msg: the message structure
* @initiator: the logical address of the initiator
* @destination:the logical address of the destination (0xf for broadcast)
*
* The whole structure is zeroed, the len field is set to 1 (i.e. a poll
* message) and the initiator and destination are filled in.
*/
static inline void cec_msg_init(struct cec_msg *msg,
__u8 initiator, __u8 destination)
{
memset(msg, 0, sizeof(*msg));
msg->msg[0] = (initiator << 4) | destination;
msg->len = 1;
}
/**
* cec_msg_set_reply_to - fill in destination/initiator in a reply message.
* @msg: the message structure for the reply
* @orig: the original message structure
*
* Set the msg destination to the orig initiator and the msg initiator to the
* orig destination. Note that msg and orig may be the same pointer, in which
* case the change is done in place.
*/
static inline void cec_msg_set_reply_to(struct cec_msg *msg,
struct cec_msg *orig)
{
/* The destination becomes the initiator and vice versa */
msg->msg[0] = (cec_msg_destination(orig) << 4) |
cec_msg_initiator(orig);
msg->reply = msg->timeout = 0;
}
/* cec status field */
#define CEC_TX_STATUS_OK (1 << 0)
#define CEC_TX_STATUS_ARB_LOST (1 << 1)
#define CEC_TX_STATUS_NACK (1 << 2)
#define CEC_TX_STATUS_LOW_DRIVE (1 << 3)
#define CEC_TX_STATUS_ERROR (1 << 4)
#define CEC_TX_STATUS_MAX_RETRIES (1 << 5)
#define CEC_RX_STATUS_OK (1 << 0)
#define CEC_RX_STATUS_TIMEOUT (1 << 1)
#define CEC_RX_STATUS_FEATURE_ABORT (1 << 2)
static inline bool cec_msg_status_is_ok(const struct cec_msg *msg)
{
if (msg->tx_status && !(msg->tx_status & CEC_TX_STATUS_OK))
return false;
if (msg->rx_status && !(msg->rx_status & CEC_RX_STATUS_OK))
return false;
if (!msg->tx_status && !msg->rx_status)
return false;
return !(msg->rx_status & CEC_RX_STATUS_FEATURE_ABORT);
}
#define CEC_LOG_ADDR_INVALID 0xff
#define CEC_PHYS_ADDR_INVALID 0xffff
/*
* The maximum number of logical addresses one device can be assigned to.
* The CEC 2.0 spec allows for only 2 logical addresses at the moment. The
* Analog Devices CEC hardware supports 3. So let's go wild and go for 4.
*/
#define CEC_MAX_LOG_ADDRS 4
/* The logical addresses defined by CEC 2.0 */
#define CEC_LOG_ADDR_TV 0
#define CEC_LOG_ADDR_RECORD_1 1
#define CEC_LOG_ADDR_RECORD_2 2
#define CEC_LOG_ADDR_TUNER_1 3
#define CEC_LOG_ADDR_PLAYBACK_1 4
#define CEC_LOG_ADDR_AUDIOSYSTEM 5
#define CEC_LOG_ADDR_TUNER_2 6
#define CEC_LOG_ADDR_TUNER_3 7
#define CEC_LOG_ADDR_PLAYBACK_2 8
#define CEC_LOG_ADDR_RECORD_3 9
#define CEC_LOG_ADDR_TUNER_4 10
#define CEC_LOG_ADDR_PLAYBACK_3 11
#define CEC_LOG_ADDR_BACKUP_1 12
#define CEC_LOG_ADDR_BACKUP_2 13
#define CEC_LOG_ADDR_SPECIFIC 14
#define CEC_LOG_ADDR_UNREGISTERED 15 /* as initiator address */
#define CEC_LOG_ADDR_BROADCAST 15 /* ad destination address */
/* The logical address types that the CEC device wants to claim */
#define CEC_LOG_ADDR_TYPE_TV 0
#define CEC_LOG_ADDR_TYPE_RECORD 1
#define CEC_LOG_ADDR_TYPE_TUNER 2
#define CEC_LOG_ADDR_TYPE_PLAYBACK 3
#define CEC_LOG_ADDR_TYPE_AUDIOSYSTEM 4
#define CEC_LOG_ADDR_TYPE_SPECIFIC 5
#define CEC_LOG_ADDR_TYPE_UNREGISTERED 6
/*
* Switches should use UNREGISTERED.
* Processors should use SPECIFIC.
*/
#define CEC_LOG_ADDR_MASK_TV (1 << CEC_LOG_ADDR_TV)
#define CEC_LOG_ADDR_MASK_RECORD ((1 << CEC_LOG_ADDR_RECORD_1) | \
(1 << CEC_LOG_ADDR_RECORD_2) | \
(1 << CEC_LOG_ADDR_RECORD_3))
#define CEC_LOG_ADDR_MASK_TUNER ((1 << CEC_LOG_ADDR_TUNER_1) | \
(1 << CEC_LOG_ADDR_TUNER_2) | \
(1 << CEC_LOG_ADDR_TUNER_3) | \
(1 << CEC_LOG_ADDR_TUNER_4))
#define CEC_LOG_ADDR_MASK_PLAYBACK ((1 << CEC_LOG_ADDR_PLAYBACK_1) | \
(1 << CEC_LOG_ADDR_PLAYBACK_2) | \
(1 << CEC_LOG_ADDR_PLAYBACK_3))
#define CEC_LOG_ADDR_MASK_AUDIOSYSTEM (1 << CEC_LOG_ADDR_AUDIOSYSTEM)
#define CEC_LOG_ADDR_MASK_BACKUP ((1 << CEC_LOG_ADDR_BACKUP_1) | \
(1 << CEC_LOG_ADDR_BACKUP_2))
#define CEC_LOG_ADDR_MASK_SPECIFIC (1 << CEC_LOG_ADDR_SPECIFIC)
#define CEC_LOG_ADDR_MASK_UNREGISTERED (1 << CEC_LOG_ADDR_UNREGISTERED)
static inline bool cec_has_tv(__u16 log_addr_mask)
{
return log_addr_mask & CEC_LOG_ADDR_MASK_TV;
}
static inline bool cec_has_record(__u16 log_addr_mask)
{
return log_addr_mask & CEC_LOG_ADDR_MASK_RECORD;
}
static inline bool cec_has_tuner(__u16 log_addr_mask)
{
return log_addr_mask & CEC_LOG_ADDR_MASK_TUNER;
}
static inline bool cec_has_playback(__u16 log_addr_mask)
{
return log_addr_mask & CEC_LOG_ADDR_MASK_PLAYBACK;
}
static inline bool cec_has_audiosystem(__u16 log_addr_mask)
{
return log_addr_mask & CEC_LOG_ADDR_MASK_AUDIOSYSTEM;
}
static inline bool cec_has_backup(__u16 log_addr_mask)
{
return log_addr_mask & CEC_LOG_ADDR_MASK_BACKUP;
}
static inline bool cec_has_specific(__u16 log_addr_mask)
{
return log_addr_mask & CEC_LOG_ADDR_MASK_SPECIFIC;
}
static inline bool cec_is_unregistered(__u16 log_addr_mask)
{
return log_addr_mask & CEC_LOG_ADDR_MASK_UNREGISTERED;
}
static inline bool cec_is_unconfigured(__u16 log_addr_mask)
{
return log_addr_mask == 0;
}
/*
* Use this if there is no vendor ID (CEC_G_VENDOR_ID) or if the vendor ID
* should be disabled (CEC_S_VENDOR_ID)
*/
#define CEC_VENDOR_ID_NONE 0xffffffff
/* The message handling modes */
/* Modes for initiator */
#define CEC_MODE_NO_INITIATOR (0x0 << 0)
#define CEC_MODE_INITIATOR (0x1 << 0)
#define CEC_MODE_EXCL_INITIATOR (0x2 << 0)
#define CEC_MODE_INITIATOR_MSK 0x0f
/* Modes for follower */
#define CEC_MODE_NO_FOLLOWER (0x0 << 4)
#define CEC_MODE_FOLLOWER (0x1 << 4)
#define CEC_MODE_EXCL_FOLLOWER (0x2 << 4)
#define CEC_MODE_EXCL_FOLLOWER_PASSTHRU (0x3 << 4)
#define CEC_MODE_MONITOR (0xe << 4)
#define CEC_MODE_MONITOR_ALL (0xf << 4)
#define CEC_MODE_FOLLOWER_MSK 0xf0
/* Userspace has to configure the physical address */
#define CEC_CAP_PHYS_ADDR (1 << 0)
/* Userspace has to configure the logical addresses */
#define CEC_CAP_LOG_ADDRS (1 << 1)
/* Userspace can transmit messages (and thus become follower as well) */
#define CEC_CAP_TRANSMIT (1 << 2)
/*
* Passthrough all messages instead of processing them.
*/
#define CEC_CAP_PASSTHROUGH (1 << 3)
/* Supports remote control */
#define CEC_CAP_RC (1 << 4)
/* Hardware can monitor all messages, not just directed and broadcast. */
#define CEC_CAP_MONITOR_ALL (1 << 5)
/**
* struct cec_caps - CEC capabilities structure.
* @driver: name of the CEC device driver.
* @name: name of the CEC device. @driver + @name must be unique.
* @available_log_addrs: number of available logical addresses.
* @capabilities: capabilities of the CEC adapter.
* @version: version of the CEC adapter framework.
*/
struct cec_caps {
char driver[32];
char name[32];
__u32 available_log_addrs;
__u32 capabilities;
__u32 version;
};
/**
* struct cec_log_addrs - CEC logical addresses structure.
* @log_addr: the claimed logical addresses. Set by the driver.
* @log_addr_mask: current logical address mask. Set by the driver.
* @cec_version: the CEC version that the adapter should implement. Set by the
* caller.
* @num_log_addrs: how many logical addresses should be claimed. Set by the
* caller.
* @vendor_id: the vendor ID of the device. Set by the caller.
* @flags: set to 0.
* @osd_name: the OSD name of the device. Set by the caller.
* @primary_device_type: the primary device type for each logical address.
* Set by the caller.
* @log_addr_type: the logical address types. Set by the caller.
* @all_device_types: CEC 2.0: all device types represented by the logical
* address. Set by the caller.
* @features: CEC 2.0: The logical address features. Set by the caller.
*/
struct cec_log_addrs {
__u8 log_addr[CEC_MAX_LOG_ADDRS];
__u16 log_addr_mask;
__u8 cec_version;
__u8 num_log_addrs;
__u32 vendor_id;
__u32 flags;
char osd_name[15];
__u8 primary_device_type[CEC_MAX_LOG_ADDRS];
__u8 log_addr_type[CEC_MAX_LOG_ADDRS];
/* CEC 2.0 */
__u8 all_device_types[CEC_MAX_LOG_ADDRS];
__u8 features[CEC_MAX_LOG_ADDRS][12];
};
/* Events */
/* Event that occurs when the adapter state changes */
#define CEC_EVENT_STATE_CHANGE 1
/*
* This event is sent when messages are lost because the application
* didn't empty the message queue in time
*/
#define CEC_EVENT_LOST_MSGS 2
#define CEC_EVENT_FL_INITIAL_STATE (1 << 0)
/**
* struct cec_event_state_change - used when the CEC adapter changes state.
* @phys_addr: the current physical address
* @log_addr_mask: the current logical address mask
*/
struct cec_event_state_change {
__u16 phys_addr;
__u16 log_addr_mask;
};
/**
* struct cec_event_lost_msgs - tells you how many messages were lost due.
* @lost_msgs: how many messages were lost.
*/
struct cec_event_lost_msgs {
__u32 lost_msgs;
};
/**
* struct cec_event - CEC event structure
* @ts: the timestamp of when the event was sent.
* @event: the event.
* array.
* @state_change: the event payload for CEC_EVENT_STATE_CHANGE.
* @lost_msgs: the event payload for CEC_EVENT_LOST_MSGS.
* @raw: array to pad the union.
*/
struct cec_event {
__u64 ts;
__u32 event;
__u32 flags;
union {
struct cec_event_state_change state_change;
struct cec_event_lost_msgs lost_msgs;
__u32 raw[16];
};
};
/* ioctls */
/* Adapter capabilities */
#define CEC_ADAP_G_CAPS _IOWR('a', 0, struct cec_caps)
/*
* phys_addr is either 0 (if this is the CEC root device)
* or a valid physical address obtained from the sink's EDID
* as read by this CEC device (if this is a source device)
* or a physical address obtained and modified from a sink
* EDID and used for a sink CEC device.
* If nothing is connected, then phys_addr is 0xffff.
* See HDMI 1.4b, section 8.7 (Physical Address).
*
* The CEC_ADAP_S_PHYS_ADDR ioctl may not be available if that is handled
* internally.
*/
#define CEC_ADAP_G_PHYS_ADDR _IOR('a', 1, __u16)
#define CEC_ADAP_S_PHYS_ADDR _IOW('a', 2, __u16)
/*
* Configure the CEC adapter. It sets the device type and which
* logical types it will try to claim. It will return which
* logical addresses it could actually claim.
* An error is returned if the adapter is disabled or if there
* is no physical address assigned.
*/
#define CEC_ADAP_G_LOG_ADDRS _IOR('a', 3, struct cec_log_addrs)
#define CEC_ADAP_S_LOG_ADDRS _IOWR('a', 4, struct cec_log_addrs)
/* Transmit/receive a CEC command */
#define CEC_TRANSMIT _IOWR('a', 5, struct cec_msg)
#define CEC_RECEIVE _IOWR('a', 6, struct cec_msg)
/* Dequeue CEC events */
#define CEC_DQEVENT _IOWR('a', 7, struct cec_event)
/*
* Get and set the message handling mode for this filehandle.
*/
#define CEC_G_MODE _IOR('a', 8, __u32)
#define CEC_S_MODE _IOW('a', 9, __u32)
/*
* The remainder of this header defines all CEC messages and operands.
* The format matters since it the cec-ctl utility parses it to generate
* code for implementing all these messages.
*
* Comments ending with 'Feature' group messages for each feature.
* If messages are part of multiple features, then the "Has also"
* comment is used to list the previously defined messages that are
* supported by the feature.
*
* Before operands are defined a comment is added that gives the
* name of the operand and in brackets the variable name of the
* corresponding argument in the cec-funcs.h function.
*/
/* Messages */
/* One Touch Play Feature */
#define CEC_MSG_ACTIVE_SOURCE 0x82
#define CEC_MSG_IMAGE_VIEW_ON 0x04
#define CEC_MSG_TEXT_VIEW_ON 0x0d
/* Routing Control Feature */
/*
* Has also:
* CEC_MSG_ACTIVE_SOURCE
*/
#define CEC_MSG_INACTIVE_SOURCE 0x9d
#define CEC_MSG_REQUEST_ACTIVE_SOURCE 0x85
#define CEC_MSG_ROUTING_CHANGE 0x80
#define CEC_MSG_ROUTING_INFORMATION 0x81
#define CEC_MSG_SET_STREAM_PATH 0x86
/* Standby Feature */
#define CEC_MSG_STANDBY 0x36
/* One Touch Record Feature */
#define CEC_MSG_RECORD_OFF 0x0b
#define CEC_MSG_RECORD_ON 0x09
/* Record Source Type Operand (rec_src_type) */
#define CEC_OP_RECORD_SRC_OWN 1
#define CEC_OP_RECORD_SRC_DIGITAL 2
#define CEC_OP_RECORD_SRC_ANALOG 3
#define CEC_OP_RECORD_SRC_EXT_PLUG 4
#define CEC_OP_RECORD_SRC_EXT_PHYS_ADDR 5
/* Service Identification Method Operand (service_id_method) */
#define CEC_OP_SERVICE_ID_METHOD_BY_DIG_ID 0
#define CEC_OP_SERVICE_ID_METHOD_BY_CHANNEL 1
/* Digital Service Broadcast System Operand (dig_bcast_system) */
#define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_ARIB_GEN 0x00
#define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_ATSC_GEN 0x01
#define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_DVB_GEN 0x02
#define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_ARIB_BS 0x08
#define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_ARIB_CS 0x09
#define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_ARIB_T 0x0a
#define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_ATSC_CABLE 0x10
#define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_ATSC_SAT 0x11
#define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_ATSC_T 0x12
#define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_DVB_C 0x18
#define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_DVB_S 0x19
#define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_DVB_S2 0x1a
#define CEC_OP_DIG_SERVICE_BCAST_SYSTEM_DVB_T 0x1b
/* Analogue Broadcast Type Operand (ana_bcast_type) */
#define CEC_OP_ANA_BCAST_TYPE_CABLE 0
#define CEC_OP_ANA_BCAST_TYPE_SATELLITE 1
#define CEC_OP_ANA_BCAST_TYPE_TERRESTRIAL 2
/* Broadcast System Operand (bcast_system) */
#define CEC_OP_BCAST_SYSTEM_PAL_BG 0x00
#define CEC_OP_BCAST_SYSTEM_SECAM_LQ 0x01 /* SECAM L' */
#define CEC_OP_BCAST_SYSTEM_PAL_M 0x02
#define CEC_OP_BCAST_SYSTEM_NTSC_M 0x03
#define CEC_OP_BCAST_SYSTEM_PAL_I 0x04
#define CEC_OP_BCAST_SYSTEM_SECAM_DK 0x05
#define CEC_OP_BCAST_SYSTEM_SECAM_BG 0x06
#define CEC_OP_BCAST_SYSTEM_SECAM_L 0x07
#define CEC_OP_BCAST_SYSTEM_PAL_DK 0x08
#define CEC_OP_BCAST_SYSTEM_OTHER 0x1f
/* Channel Number Format Operand (channel_number_fmt) */
#define CEC_OP_CHANNEL_NUMBER_FMT_1_PART 0x01
#define CEC_OP_CHANNEL_NUMBER_FMT_2_PART 0x02
#define CEC_MSG_RECORD_STATUS 0x0a
/* Record Status Operand (rec_status) */
#define CEC_OP_RECORD_STATUS_CUR_SRC 0x01
#define CEC_OP_RECORD_STATUS_DIG_SERVICE 0x02
#define CEC_OP_RECORD_STATUS_ANA_SERVICE 0x03
#define CEC_OP_RECORD_STATUS_EXT_INPUT 0x04
#define CEC_OP_RECORD_STATUS_NO_DIG_SERVICE 0x05
#define CEC_OP_RECORD_STATUS_NO_ANA_SERVICE 0x06
#define CEC_OP_RECORD_STATUS_NO_SERVICE 0x07
#define CEC_OP_RECORD_STATUS_INVALID_EXT_PLUG 0x09
#define CEC_OP_RECORD_STATUS_INVALID_EXT_PHYS_ADDR 0x0a
#define CEC_OP_RECORD_STATUS_UNSUP_CA 0x0b
#define CEC_OP_RECORD_STATUS_NO_CA_ENTITLEMENTS 0x0c
#define CEC_OP_RECORD_STATUS_CANT_COPY_SRC 0x0d
#define CEC_OP_RECORD_STATUS_NO_MORE_COPIES 0x0e
#define CEC_OP_RECORD_STATUS_NO_MEDIA 0x10
#define CEC_OP_RECORD_STATUS_PLAYING 0x11
#define CEC_OP_RECORD_STATUS_ALREADY_RECORDING 0x12
#define CEC_OP_RECORD_STATUS_MEDIA_PROT 0x13
#define CEC_OP_RECORD_STATUS_NO_SIGNAL 0x14
#define CEC_OP_RECORD_STATUS_MEDIA_PROBLEM 0x15
#define CEC_OP_RECORD_STATUS_NO_SPACE 0x16
#define CEC_OP_RECORD_STATUS_PARENTAL_LOCK 0x17
#define CEC_OP_RECORD_STATUS_TERMINATED_OK 0x1a
#define CEC_OP_RECORD_STATUS_ALREADY_TERM 0x1b
#define CEC_OP_RECORD_STATUS_OTHER 0x1f
#define CEC_MSG_RECORD_TV_SCREEN 0x0f
/* Timer Programming Feature */
#define CEC_MSG_CLEAR_ANALOGUE_TIMER 0x33
/* Recording Sequence Operand (recording_seq) */
#define CEC_OP_REC_SEQ_SUNDAY 0x01
#define CEC_OP_REC_SEQ_MONDAY 0x02
#define CEC_OP_REC_SEQ_TUESDAY 0x04
#define CEC_OP_REC_SEQ_WEDNESDAY 0x08
#define CEC_OP_REC_SEQ_THURSDAY 0x10
#define CEC_OP_REC_SEQ_FRIDAY 0x20
#define CEC_OP_REC_SEQ_SATERDAY 0x40
#define CEC_OP_REC_SEQ_ONCE_ONLY 0x00
#define CEC_MSG_CLEAR_DIGITAL_TIMER 0x99
#define CEC_MSG_CLEAR_EXT_TIMER 0xa1
/* External Source Specifier Operand (ext_src_spec) */
#define CEC_OP_EXT_SRC_PLUG 0x04
#define CEC_OP_EXT_SRC_PHYS_ADDR 0x05
#define CEC_MSG_SET_ANALOGUE_TIMER 0x34
#define CEC_MSG_SET_DIGITAL_TIMER 0x97
#define CEC_MSG_SET_EXT_TIMER 0xa2
#define CEC_MSG_SET_TIMER_PROGRAM_TITLE 0x67
#define CEC_MSG_TIMER_CLEARED_STATUS 0x43
/* Timer Cleared Status Data Operand (timer_cleared_status) */
#define CEC_OP_TIMER_CLR_STAT_RECORDING 0x00
#define CEC_OP_TIMER_CLR_STAT_NO_MATCHING 0x01
#define CEC_OP_TIMER_CLR_STAT_NO_INFO 0x02
#define CEC_OP_TIMER_CLR_STAT_CLEARED 0x80
#define CEC_MSG_TIMER_STATUS 0x35
/* Timer Overlap Warning Operand (timer_overlap_warning) */
#define CEC_OP_TIMER_OVERLAP_WARNING_NO_OVERLAP 0
#define CEC_OP_TIMER_OVERLAP_WARNING_OVERLAP 1
/* Media Info Operand (media_info) */
#define CEC_OP_MEDIA_INFO_UNPROT_MEDIA 0
#define CEC_OP_MEDIA_INFO_PROT_MEDIA 1
#define CEC_OP_MEDIA_INFO_NO_MEDIA 2
/* Programmed Indicator Operand (prog_indicator) */
#define CEC_OP_PROG_IND_NOT_PROGRAMMED 0
#define CEC_OP_PROG_IND_PROGRAMMED 1
/* Programmed Info Operand (prog_info) */
#define CEC_OP_PROG_INFO_ENOUGH_SPACE 0x08
#define CEC_OP_PROG_INFO_NOT_ENOUGH_SPACE 0x09
#define CEC_OP_PROG_INFO_MIGHT_NOT_BE_ENOUGH_SPACE 0x0b
#define CEC_OP_PROG_INFO_NONE_AVAILABLE 0x0a
/* Not Programmed Error Info Operand (prog_error) */
#define CEC_OP_PROG_ERROR_NO_FREE_TIMER 0x01
#define CEC_OP_PROG_ERROR_DATE_OUT_OF_RANGE 0x02
#define CEC_OP_PROG_ERROR_REC_SEQ_ERROR 0x03
#define CEC_OP_PROG_ERROR_INV_EXT_PLUG 0x04
#define CEC_OP_PROG_ERROR_INV_EXT_PHYS_ADDR 0x05
#define CEC_OP_PROG_ERROR_CA_UNSUPP 0x06
#define CEC_OP_PROG_ERROR_INSUF_CA_ENTITLEMENTS 0x07
#define CEC_OP_PROG_ERROR_RESOLUTION_UNSUPP 0x08
#define CEC_OP_PROG_ERROR_PARENTAL_LOCK 0x09
#define CEC_OP_PROG_ERROR_CLOCK_FAILURE 0x0a
#define CEC_OP_PROG_ERROR_DUPLICATE 0x0e
/* System Information Feature */
#define CEC_MSG_CEC_VERSION 0x9e
/* CEC Version Operand (cec_version) */
#define CEC_OP_CEC_VERSION_1_3A 4
#define CEC_OP_CEC_VERSION_1_4 5
#define CEC_OP_CEC_VERSION_2_0 6
#define CEC_MSG_GET_CEC_VERSION 0x9f
#define CEC_MSG_GIVE_PHYSICAL_ADDR 0x83
#define CEC_MSG_GET_MENU_LANGUAGE 0x91
#define CEC_MSG_REPORT_PHYSICAL_ADDR 0x84
/* Primary Device Type Operand (prim_devtype) */
#define CEC_OP_PRIM_DEVTYPE_TV 0
#define CEC_OP_PRIM_DEVTYPE_RECORD 1
#define CEC_OP_PRIM_DEVTYPE_TUNER 3
#define CEC_OP_PRIM_DEVTYPE_PLAYBACK 4
#define CEC_OP_PRIM_DEVTYPE_AUDIOSYSTEM 5
#define CEC_OP_PRIM_DEVTYPE_SWITCH 6
#define CEC_OP_PRIM_DEVTYPE_PROCESSOR 7
#define CEC_MSG_SET_MENU_LANGUAGE 0x32
#define CEC_MSG_REPORT_FEATURES 0xa6 /* HDMI 2.0 */
/* All Device Types Operand (all_device_types) */
#define CEC_OP_ALL_DEVTYPE_TV 0x80
#define CEC_OP_ALL_DEVTYPE_RECORD 0x40
#define CEC_OP_ALL_DEVTYPE_TUNER 0x20
#define CEC_OP_ALL_DEVTYPE_PLAYBACK 0x10
#define CEC_OP_ALL_DEVTYPE_AUDIOSYSTEM 0x08
#define CEC_OP_ALL_DEVTYPE_SWITCH 0x04
/*
* And if you wondering what happened to PROCESSOR devices: those should
* be mapped to a SWITCH.
*/
/* Valid for RC Profile and Device Feature operands */
#define CEC_OP_FEAT_EXT 0x80 /* Extension bit */
/* RC Profile Operand (rc_profile) */
#define CEC_OP_FEAT_RC_TV_PROFILE_NONE 0x00
#define CEC_OP_FEAT_RC_TV_PROFILE_1 0x02
#define CEC_OP_FEAT_RC_TV_PROFILE_2 0x06
#define CEC_OP_FEAT_RC_TV_PROFILE_3 0x0a
#define CEC_OP_FEAT_RC_TV_PROFILE_4 0x0e
#define CEC_OP_FEAT_RC_SRC_HAS_DEV_ROOT_MENU 0x50
#define CEC_OP_FEAT_RC_SRC_HAS_DEV_SETUP_MENU 0x48
#define CEC_OP_FEAT_RC_SRC_HAS_CONTENTS_MENU 0x44
#define CEC_OP_FEAT_RC_SRC_HAS_MEDIA_TOP_MENU 0x42
#define CEC_OP_FEAT_RC_SRC_HAS_MEDIA_CONTEXT_MENU 0x41
/* Device Feature Operand (dev_features) */
#define CEC_OP_FEAT_DEV_HAS_RECORD_TV_SCREEN 0x40
#define CEC_OP_FEAT_DEV_HAS_SET_OSD_STRING 0x20
#define CEC_OP_FEAT_DEV_HAS_DECK_CONTROL 0x10
#define CEC_OP_FEAT_DEV_HAS_SET_AUDIO_RATE 0x08
#define CEC_OP_FEAT_DEV_SINK_HAS_ARC_TX 0x04
#define CEC_OP_FEAT_DEV_SOURCE_HAS_ARC_RX 0x02
#define CEC_MSG_GIVE_FEATURES 0xa5 /* HDMI 2.0 */
/* Deck Control Feature */
#define CEC_MSG_DECK_CONTROL 0x42
/* Deck Control Mode Operand (deck_control_mode) */
#define CEC_OP_DECK_CTL_MODE_SKIP_FWD 1
#define CEC_OP_DECK_CTL_MODE_SKIP_REV 2
#define CEC_OP_DECK_CTL_MODE_STOP 3
#define CEC_OP_DECK_CTL_MODE_EJECT 4
#define CEC_MSG_DECK_STATUS 0x1b
/* Deck Info Operand (deck_info) */
#define CEC_OP_DECK_INFO_PLAY 0x11
#define CEC_OP_DECK_INFO_RECORD 0x12
#define CEC_OP_DECK_INFO_PLAY_REV 0x13
#define CEC_OP_DECK_INFO_STILL 0x14
#define CEC_OP_DECK_INFO_SLOW 0x15
#define CEC_OP_DECK_INFO_SLOW_REV 0x16
#define CEC_OP_DECK_INFO_FAST_FWD 0x17
#define CEC_OP_DECK_INFO_FAST_REV 0x18
#define CEC_OP_DECK_INFO_NO_MEDIA 0x19
#define CEC_OP_DECK_INFO_STOP 0x1a
#define CEC_OP_DECK_INFO_SKIP_FWD 0x1b
#define CEC_OP_DECK_INFO_SKIP_REV 0x1c
#define CEC_OP_DECK_INFO_INDEX_SEARCH_FWD 0x1d
#define CEC_OP_DECK_INFO_INDEX_SEARCH_REV 0x1e
#define CEC_OP_DECK_INFO_OTHER 0x1f
#define CEC_MSG_GIVE_DECK_STATUS 0x1a
/* Status Request Operand (status_req) */
#define CEC_OP_STATUS_REQ_ON 1
#define CEC_OP_STATUS_REQ_OFF 2
#define CEC_OP_STATUS_REQ_ONCE 3
#define CEC_MSG_PLAY 0x41
/* Play Mode Operand (play_mode) */
#define CEC_OP_PLAY_MODE_PLAY_FWD 0x24
#define CEC_OP_PLAY_MODE_PLAY_REV 0x20
#define CEC_OP_PLAY_MODE_PLAY_STILL 0x25
#define CEC_OP_PLAY_MODE_PLAY_FAST_FWD_MIN 0x05
#define CEC_OP_PLAY_MODE_PLAY_FAST_FWD_MED 0x06
#define CEC_OP_PLAY_MODE_PLAY_FAST_FWD_MAX 0x07
#define CEC_OP_PLAY_MODE_PLAY_FAST_REV_MIN 0x09
#define CEC_OP_PLAY_MODE_PLAY_FAST_REV_MED 0x0a
#define CEC_OP_PLAY_MODE_PLAY_FAST_REV_MAX 0x0b
#define CEC_OP_PLAY_MODE_PLAY_SLOW_FWD_MIN 0x15
#define CEC_OP_PLAY_MODE_PLAY_SLOW_FWD_MED 0x16
#define CEC_OP_PLAY_MODE_PLAY_SLOW_FWD_MAX 0x17
#define CEC_OP_PLAY_MODE_PLAY_SLOW_REV_MIN 0x19
#define CEC_OP_PLAY_MODE_PLAY_SLOW_REV_MED 0x1a
#define CEC_OP_PLAY_MODE_PLAY_SLOW_REV_MAX 0x1b
/* Tuner Control Feature */
#define CEC_MSG_GIVE_TUNER_DEVICE_STATUS 0x08
#define CEC_MSG_SELECT_ANALOGUE_SERVICE 0x92
#define CEC_MSG_SELECT_DIGITAL_SERVICE 0x93
#define CEC_MSG_TUNER_DEVICE_STATUS 0x07
/* Recording Flag Operand (rec_flag) */
#define CEC_OP_REC_FLAG_USED 0
#define CEC_OP_REC_FLAG_NOT_USED 1
/* Tuner Display Info Operand (tuner_display_info) */
#define CEC_OP_TUNER_DISPLAY_INFO_DIGITAL 0
#define CEC_OP_TUNER_DISPLAY_INFO_NONE 1
#define CEC_OP_TUNER_DISPLAY_INFO_ANALOGUE 2
#define CEC_MSG_TUNER_STEP_DECREMENT 0x06
#define CEC_MSG_TUNER_STEP_INCREMENT 0x05
/* Vendor Specific Commands Feature */
/*
* Has also:
* CEC_MSG_CEC_VERSION
* CEC_MSG_GET_CEC_VERSION
*/
#define CEC_MSG_DEVICE_VENDOR_ID 0x87
#define CEC_MSG_GIVE_DEVICE_VENDOR_ID 0x8c
#define CEC_MSG_VENDOR_COMMAND 0x89
#define CEC_MSG_VENDOR_COMMAND_WITH_ID 0xa0
#define CEC_MSG_VENDOR_REMOTE_BUTTON_DOWN 0x8a
#define CEC_MSG_VENDOR_REMOTE_BUTTON_UP 0x8b
/* OSD Display Feature */
#define CEC_MSG_SET_OSD_STRING 0x64
/* Display Control Operand (disp_ctl) */
#define CEC_OP_DISP_CTL_DEFAULT 0x00
#define CEC_OP_DISP_CTL_UNTIL_CLEARED 0x40
#define CEC_OP_DISP_CTL_CLEAR 0x80
/* Device OSD Transfer Feature */
#define CEC_MSG_GIVE_OSD_NAME 0x46
#define CEC_MSG_SET_OSD_NAME 0x47
/* Device Menu Control Feature */
#define CEC_MSG_MENU_REQUEST 0x8d
/* Menu Request Type Operand (menu_req) */
#define CEC_OP_MENU_REQUEST_ACTIVATE 0x00
#define CEC_OP_MENU_REQUEST_DEACTIVATE 0x01
#define CEC_OP_MENU_REQUEST_QUERY 0x02
#define CEC_MSG_MENU_STATUS 0x8e
/* Menu State Operand (menu_state) */
#define CEC_OP_MENU_STATE_ACTIVATED 0x00
#define CEC_OP_MENU_STATE_DEACTIVATED 0x01
#define CEC_MSG_USER_CONTROL_PRESSED 0x44
/* UI Broadcast Type Operand (ui_bcast_type) */
#define CEC_OP_UI_BCAST_TYPE_TOGGLE_ALL 0x00
#define CEC_OP_UI_BCAST_TYPE_TOGGLE_DIG_ANA 0x01
#define CEC_OP_UI_BCAST_TYPE_ANALOGUE 0x10
#define CEC_OP_UI_BCAST_TYPE_ANALOGUE_T 0x20
#define CEC_OP_UI_BCAST_TYPE_ANALOGUE_CABLE 0x30
#define CEC_OP_UI_BCAST_TYPE_ANALOGUE_SAT 0x40
#define CEC_OP_UI_BCAST_TYPE_DIGITAL 0x50
#define CEC_OP_UI_BCAST_TYPE_DIGITAL_T 0x60
#define CEC_OP_UI_BCAST_TYPE_DIGITAL_CABLE 0x70
#define CEC_OP_UI_BCAST_TYPE_DIGITAL_SAT 0x80
#define CEC_OP_UI_BCAST_TYPE_DIGITAL_COM_SAT 0x90
#define CEC_OP_UI_BCAST_TYPE_DIGITAL_COM_SAT2 0x91
#define CEC_OP_UI_BCAST_TYPE_IP 0xa0
/* UI Sound Presentation Control Operand (ui_snd_pres_ctl) */
#define CEC_OP_UI_SND_PRES_CTL_DUAL_MONO 0x10
#define CEC_OP_UI_SND_PRES_CTL_KARAOKE 0x20
#define CEC_OP_UI_SND_PRES_CTL_DOWNMIX 0x80
#define CEC_OP_UI_SND_PRES_CTL_REVERB 0x90
#define CEC_OP_UI_SND_PRES_CTL_EQUALIZER 0xa0
#define CEC_OP_UI_SND_PRES_CTL_BASS_UP 0xb1
#define CEC_OP_UI_SND_PRES_CTL_BASS_NEUTRAL 0xb2
#define CEC_OP_UI_SND_PRES_CTL_BASS_DOWN 0xb3
#define CEC_OP_UI_SND_PRES_CTL_TREBLE_UP 0xc1
#define CEC_OP_UI_SND_PRES_CTL_TREBLE_NEUTRAL 0xc2
#define CEC_OP_UI_SND_PRES_CTL_TREBLE_DOWN 0xc3
#define CEC_MSG_USER_CONTROL_RELEASED 0x45
/* Remote Control Passthrough Feature */
/*
* Has also:
* CEC_MSG_USER_CONTROL_PRESSED
* CEC_MSG_USER_CONTROL_RELEASED
*/
/* Power Status Feature */
#define CEC_MSG_GIVE_DEVICE_POWER_STATUS 0x8f
#define CEC_MSG_REPORT_POWER_STATUS 0x90
/* Power Status Operand (pwr_state) */
#define CEC_OP_POWER_STATUS_ON 0
#define CEC_OP_POWER_STATUS_STANDBY 1
#define CEC_OP_POWER_STATUS_TO_ON 2
#define CEC_OP_POWER_STATUS_TO_STANDBY 3
/* General Protocol Messages */
#define CEC_MSG_FEATURE_ABORT 0x00
/* Abort Reason Operand (reason) */
#define CEC_OP_ABORT_UNRECOGNIZED_OP 0
#define CEC_OP_ABORT_INCORRECT_MODE 1
#define CEC_OP_ABORT_NO_SOURCE 2
#define CEC_OP_ABORT_INVALID_OP 3
#define CEC_OP_ABORT_REFUSED 4
#define CEC_OP_ABORT_UNDETERMINED 5
#define CEC_MSG_ABORT 0xff
/* System Audio Control Feature */
/*
* Has also:
* CEC_MSG_USER_CONTROL_PRESSED
* CEC_MSG_USER_CONTROL_RELEASED
*/
#define CEC_MSG_GIVE_AUDIO_STATUS 0x71
#define CEC_MSG_GIVE_SYSTEM_AUDIO_MODE_STATUS 0x7d
#define CEC_MSG_REPORT_AUDIO_STATUS 0x7a
/* Audio Mute Status Operand (aud_mute_status) */
#define CEC_OP_AUD_MUTE_STATUS_OFF 0
#define CEC_OP_AUD_MUTE_STATUS_ON 1
#define CEC_MSG_REPORT_SHORT_AUDIO_DESCRIPTOR 0xa3
#define CEC_MSG_REQUEST_SHORT_AUDIO_DESCRIPTOR 0xa4
#define CEC_MSG_SET_SYSTEM_AUDIO_MODE 0x72
/* System Audio Status Operand (sys_aud_status) */
#define CEC_OP_SYS_AUD_STATUS_OFF 0
#define CEC_OP_SYS_AUD_STATUS_ON 1
#define CEC_MSG_SYSTEM_AUDIO_MODE_REQUEST 0x70
#define CEC_MSG_SYSTEM_AUDIO_MODE_STATUS 0x7e
/* Audio Format ID Operand (audio_format_id) */
#define CEC_OP_AUD_FMT_ID_CEA861 0
#define CEC_OP_AUD_FMT_ID_CEA861_CXT 1
/* Audio Rate Control Feature */
#define CEC_MSG_SET_AUDIO_RATE 0x9a
/* Audio Rate Operand (audio_rate) */
#define CEC_OP_AUD_RATE_OFF 0
#define CEC_OP_AUD_RATE_WIDE_STD 1
#define CEC_OP_AUD_RATE_WIDE_FAST 2
#define CEC_OP_AUD_RATE_WIDE_SLOW 3
#define CEC_OP_AUD_RATE_NARROW_STD 4
#define CEC_OP_AUD_RATE_NARROW_FAST 5
#define CEC_OP_AUD_RATE_NARROW_SLOW 6
/* Audio Return Channel Control Feature */
#define CEC_MSG_INITIATE_ARC 0xc0
#define CEC_MSG_REPORT_ARC_INITIATED 0xc1
#define CEC_MSG_REPORT_ARC_TERMINATED 0xc2
#define CEC_MSG_REQUEST_ARC_INITIATION 0xc3
#define CEC_MSG_REQUEST_ARC_TERMINATION 0xc4
#define CEC_MSG_TERMINATE_ARC 0xc5
/* Dynamic Audio Lipsync Feature */
/* Only for CEC 2.0 and up */
#define CEC_MSG_REQUEST_CURRENT_LATENCY 0xa7
#define CEC_MSG_REPORT_CURRENT_LATENCY 0xa8
/* Low Latency Mode Operand (low_latency_mode) */
#define CEC_OP_LOW_LATENCY_MODE_OFF 0
#define CEC_OP_LOW_LATENCY_MODE_ON 1
/* Audio Output Compensated Operand (audio_out_compensated) */
#define CEC_OP_AUD_OUT_COMPENSATED_NA 0
#define CEC_OP_AUD_OUT_COMPENSATED_DELAY 1
#define CEC_OP_AUD_OUT_COMPENSATED_NO_DELAY 2
#define CEC_OP_AUD_OUT_COMPENSATED_PARTIAL_DELAY 3
/* Capability Discovery and Control Feature */
#define CEC_MSG_CDC_MESSAGE 0xf8
/* Ethernet-over-HDMI: nobody ever does this... */
#define CEC_MSG_CDC_HEC_INQUIRE_STATE 0x00
#define CEC_MSG_CDC_HEC_REPORT_STATE 0x01
/* HEC Functionality State Operand (hec_func_state) */
#define CEC_OP_HEC_FUNC_STATE_NOT_SUPPORTED 0
#define CEC_OP_HEC_FUNC_STATE_INACTIVE 1
#define CEC_OP_HEC_FUNC_STATE_ACTIVE 2
#define CEC_OP_HEC_FUNC_STATE_ACTIVATION_FIELD 3
/* Host Functionality State Operand (host_func_state) */
#define CEC_OP_HOST_FUNC_STATE_NOT_SUPPORTED 0
#define CEC_OP_HOST_FUNC_STATE_INACTIVE 1
#define CEC_OP_HOST_FUNC_STATE_ACTIVE 2
/* ENC Functionality State Operand (enc_func_state) */
#define CEC_OP_ENC_FUNC_STATE_EXT_CON_NOT_SUPPORTED 0
#define CEC_OP_ENC_FUNC_STATE_EXT_CON_INACTIVE 1
#define CEC_OP_ENC_FUNC_STATE_EXT_CON_ACTIVE 2
/* CDC Error Code Operand (cdc_errcode) */
#define CEC_OP_CDC_ERROR_CODE_NONE 0
#define CEC_OP_CDC_ERROR_CODE_CAP_UNSUPPORTED 1
#define CEC_OP_CDC_ERROR_CODE_WRONG_STATE 2
#define CEC_OP_CDC_ERROR_CODE_OTHER 3
/* HEC Support Operand (hec_support) */
#define CEC_OP_HEC_SUPPORT_NO 0
#define CEC_OP_HEC_SUPPORT_YES 1
/* HEC Activation Operand (hec_activation) */
#define CEC_OP_HEC_ACTIVATION_ON 0
#define CEC_OP_HEC_ACTIVATION_OFF 1
#define CEC_MSG_CDC_HEC_SET_STATE_ADJACENT 0x02
#define CEC_MSG_CDC_HEC_SET_STATE 0x03
/* HEC Set State Operand (hec_set_state) */
#define CEC_OP_HEC_SET_STATE_DEACTIVATE 0
#define CEC_OP_HEC_SET_STATE_ACTIVATE 1
#define CEC_MSG_CDC_HEC_REQUEST_DEACTIVATION 0x04
#define CEC_MSG_CDC_HEC_NOTIFY_ALIVE 0x05
#define CEC_MSG_CDC_HEC_DISCOVER 0x06
/* Hotplug Detect messages */
#define CEC_MSG_CDC_HPD_SET_STATE 0x10
/* HPD State Operand (hpd_state) */
#define CEC_OP_HPD_STATE_CP_EDID_DISABLE 0
#define CEC_OP_HPD_STATE_CP_EDID_ENABLE 1
#define CEC_OP_HPD_STATE_CP_EDID_DISABLE_ENABLE 2
#define CEC_OP_HPD_STATE_EDID_DISABLE 3
#define CEC_OP_HPD_STATE_EDID_ENABLE 4
#define CEC_OP_HPD_STATE_EDID_DISABLE_ENABLE 5
#define CEC_MSG_CDC_HPD_REPORT_STATE 0x11
/* HPD Error Code Operand (hpd_error) */
#define CEC_OP_HPD_ERROR_NONE 0
#define CEC_OP_HPD_ERROR_INITIATOR_NOT_CAPABLE 1
#define CEC_OP_HPD_ERROR_INITIATOR_WRONG_STATE 2
#define CEC_OP_HPD_ERROR_OTHER 3
#define CEC_OP_HPD_ERROR_NONE_NO_VIDEO 4
#endif

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/*
* cec-edid - HDMI Consumer Electronics Control & EDID helpers
*
* Copyright 2016 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _MEDIA_CEC_EDID_H
#define _MEDIA_CEC_EDID_H
#include <linux/types.h>
#define CEC_PHYS_ADDR_INVALID 0xffff
#define cec_phys_addr_exp(pa) \
((pa) >> 12), ((pa) >> 8) & 0xf, ((pa) >> 4) & 0xf, (pa) & 0xf
/**
* cec_get_edid_phys_addr() - find and return the physical address
*
* @edid: pointer to the EDID data
* @size: size in bytes of the EDID data
* @offset: If not %NULL then the location of the physical address
* bytes in the EDID will be returned here. This is set to 0
* if there is no physical address found.
*
* Return: the physical address or CEC_PHYS_ADDR_INVALID if there is none.
*/
u16 cec_get_edid_phys_addr(const u8 *edid, unsigned int size,
unsigned int *offset);
/**
* cec_set_edid_phys_addr() - find and set the physical address
*
* @edid: pointer to the EDID data
* @size: size in bytes of the EDID data
* @phys_addr: the new physical address
*
* This function finds the location of the physical address in the EDID
* and fills in the given physical address and updates the checksum
* at the end of the EDID block. It does nothing if the EDID doesn't
* contain a physical address.
*/
void cec_set_edid_phys_addr(u8 *edid, unsigned int size, u16 phys_addr);
/**
* cec_phys_addr_for_input() - calculate the PA for an input
*
* @phys_addr: the physical address of the parent
* @input: the number of the input port, must be between 1 and 15
*
* This function calculates a new physical address based on the input
* port number. For example:
*
* PA = 0.0.0.0 and input = 2 becomes 2.0.0.0
*
* PA = 3.0.0.0 and input = 1 becomes 3.1.0.0
*
* PA = 3.2.1.0 and input = 5 becomes 3.2.1.5
*
* PA = 3.2.1.3 and input = 5 becomes f.f.f.f since it maxed out the depth.
*
* Return: the new physical address or CEC_PHYS_ADDR_INVALID.
*/
u16 cec_phys_addr_for_input(u16 phys_addr, u8 input);
/**
* cec_phys_addr_validate() - validate a physical address from an EDID
*
* @phys_addr: the physical address to validate
* @parent: if not %NULL, then this is filled with the parents PA.
* @port: if not %NULL, then this is filled with the input port.
*
* This validates a physical address as read from an EDID. If the
* PA is invalid (such as 1.0.1.0 since '0' is only allowed at the end),
* then it will return -EINVAL.
*
* The parent PA is passed into %parent and the input port is passed into
* %port. For example:
*
* PA = 0.0.0.0: has parent 0.0.0.0 and input port 0.
*
* PA = 1.0.0.0: has parent 0.0.0.0 and input port 1.
*
* PA = 3.2.0.0: has parent 3.0.0.0 and input port 2.
*
* PA = f.f.f.f: has parent f.f.f.f and input port 0.
*
* Return: 0 if the PA is valid, -EINVAL if not.
*/
int cec_phys_addr_validate(u16 phys_addr, u16 *parent, u16 *port);
#endif /* _MEDIA_CEC_EDID_H */

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/*
* cec - HDMI Consumer Electronics Control support header
*
* Copyright 2016 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _MEDIA_CEC_H
#define _MEDIA_CEC_H
#include <linux/poll.h>
#include <linux/fs.h>
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/cdev.h>
#include <linux/kthread.h>
#include <linux/timer.h>
#include <linux/cec-funcs.h>
#include <media/rc-core.h>
#include <media/cec-edid.h>
/**
* struct cec_devnode - cec device node
* @dev: cec device
* @cdev: cec character device
* @parent: parent device
* @minor: device node minor number
* @registered: the device was correctly registered
* @unregistered: the device was unregistered
* @fhs_lock: lock to control access to the filehandle list
* @fhs: the list of open filehandles (cec_fh)
*
* This structure represents a cec-related device node.
*
* The @parent is a physical device. It must be set by core or device drivers
* before registering the node.
*/
struct cec_devnode {
/* sysfs */
struct device dev;
struct cdev cdev;
struct device *parent;
/* device info */
int minor;
bool registered;
bool unregistered;
struct mutex fhs_lock;
struct list_head fhs;
};
struct cec_adapter;
struct cec_data;
struct cec_data {
struct list_head list;
struct list_head xfer_list;
struct cec_adapter *adap;
struct cec_msg msg;
struct cec_fh *fh;
struct delayed_work work;
struct completion c;
u8 attempts;
bool new_initiator;
bool blocking;
bool completed;
};
struct cec_msg_entry {
struct list_head list;
struct cec_msg msg;
};
#define CEC_NUM_EVENTS CEC_EVENT_LOST_MSGS
struct cec_fh {
struct list_head list;
struct list_head xfer_list;
struct cec_adapter *adap;
u8 mode_initiator;
u8 mode_follower;
/* Events */
wait_queue_head_t wait;
unsigned int pending_events;
struct cec_event events[CEC_NUM_EVENTS];
struct mutex lock;
struct list_head msgs; /* queued messages */
unsigned int queued_msgs;
};
#define CEC_SIGNAL_FREE_TIME_RETRY 3
#define CEC_SIGNAL_FREE_TIME_NEW_INITIATOR 5
#define CEC_SIGNAL_FREE_TIME_NEXT_XFER 7
/* The nominal data bit period is 2.4 ms */
#define CEC_FREE_TIME_TO_USEC(ft) ((ft) * 2400)
struct cec_adap_ops {
/* Low-level callbacks */
int (*adap_enable)(struct cec_adapter *adap, bool enable);
int (*adap_monitor_all_enable)(struct cec_adapter *adap, bool enable);
int (*adap_log_addr)(struct cec_adapter *adap, u8 logical_addr);
int (*adap_transmit)(struct cec_adapter *adap, u8 attempts,
u32 signal_free_time, struct cec_msg *msg);
void (*adap_status)(struct cec_adapter *adap, struct seq_file *file);
/* High-level CEC message callback */
int (*received)(struct cec_adapter *adap, struct cec_msg *msg);
};
/*
* The minimum message length you can receive (excepting poll messages) is 2.
* With a transfer rate of at most 36 bytes per second this makes 18 messages
* per second worst case.
*
* We queue at most 3 seconds worth of messages. The CEC specification requires
* that messages are replied to within a second, so 3 seconds should give more
* than enough margin. Since most messages are actually more than 2 bytes, this
* is in practice a lot more than 3 seconds.
*/
#define CEC_MAX_MSG_QUEUE_SZ (18 * 3)
struct cec_adapter {
struct module *owner;
char name[32];
struct cec_devnode devnode;
struct mutex lock;
struct rc_dev *rc;
struct list_head transmit_queue;
struct list_head wait_queue;
struct cec_data *transmitting;
struct task_struct *kthread_config;
struct completion config_completion;
struct task_struct *kthread;
wait_queue_head_t kthread_waitq;
wait_queue_head_t waitq;
const struct cec_adap_ops *ops;
void *priv;
u32 capabilities;
u8 available_log_addrs;
u16 phys_addr;
bool is_configuring;
bool is_configured;
u32 monitor_all_cnt;
u32 follower_cnt;
struct cec_fh *cec_follower;
struct cec_fh *cec_initiator;
bool passthrough;
struct cec_log_addrs log_addrs;
struct dentry *cec_dir;
struct dentry *status_file;
u16 phys_addrs[15];
u32 sequence;
char input_name[32];
char input_phys[32];
char input_drv[32];
};
static inline bool cec_has_log_addr(const struct cec_adapter *adap, u8 log_addr)
{
return adap->log_addrs.log_addr_mask & (1 << log_addr);
}
static inline bool cec_is_sink(const struct cec_adapter *adap)
{
return adap->phys_addr == 0;
}
#if IS_ENABLED(CONFIG_MEDIA_CEC)
struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops,
void *priv, const char *name, u32 caps, u8 available_las,
struct device *parent);
int cec_register_adapter(struct cec_adapter *adap);
void cec_unregister_adapter(struct cec_adapter *adap);
void cec_delete_adapter(struct cec_adapter *adap);
int cec_s_log_addrs(struct cec_adapter *adap, struct cec_log_addrs *log_addrs,
bool block);
void cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr,
bool block);
int cec_transmit_msg(struct cec_adapter *adap, struct cec_msg *msg,
bool block);
/* Called by the adapter */
void cec_transmit_done(struct cec_adapter *adap, u8 status, u8 arb_lost_cnt,
u8 nack_cnt, u8 low_drive_cnt, u8 error_cnt);
void cec_received_msg(struct cec_adapter *adap, struct cec_msg *msg);
#else
static inline int cec_register_adapter(struct cec_adapter *adap)
{
return 0;
}
static inline void cec_unregister_adapter(struct cec_adapter *adap)
{
}
static inline void cec_delete_adapter(struct cec_adapter *adap)
{
}
static inline void cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr,
bool block)
{
}
#endif
#endif /* _MEDIA_CEC_H */

6
include/media/i2c/adv7511.h
View File

@ -32,11 +32,7 @@ struct adv7511_monitor_detect {
struct adv7511_edid_detect {
int present;
int segment;
};
struct adv7511_cec_arg {
void *arg;
u32 f_flags;
uint16_t phys_addr;
};
struct adv7511_platform_data {

5
include/media/rc-map.h
View File

@ -31,6 +31,7 @@ enum rc_type {
RC_TYPE_RC6_MCE = 16, /* MCE (Philips RC6-6A-32 subtype) protocol */
RC_TYPE_SHARP = 17, /* Sharp protocol */
RC_TYPE_XMP = 18, /* XMP protocol */
RC_TYPE_CEC = 19, /* CEC protocol */
};
#define RC_BIT_NONE 0ULL
@ -53,6 +54,7 @@ enum rc_type {
#define RC_BIT_RC6_MCE (1ULL << RC_TYPE_RC6_MCE)
#define RC_BIT_SHARP (1ULL << RC_TYPE_SHARP)
#define RC_BIT_XMP (1ULL << RC_TYPE_XMP)
#define RC_BIT_CEC (1ULL << RC_TYPE_CEC)
#define RC_BIT_ALL (RC_BIT_UNKNOWN | RC_BIT_OTHER | \
RC_BIT_RC5 | RC_BIT_RC5X | RC_BIT_RC5_SZ | \
@ -61,7 +63,7 @@ enum rc_type {
RC_BIT_NEC | RC_BIT_SANYO | RC_BIT_MCE_KBD | \
RC_BIT_RC6_0 | RC_BIT_RC6_6A_20 | RC_BIT_RC6_6A_24 | \
RC_BIT_RC6_6A_32 | RC_BIT_RC6_MCE | RC_BIT_SHARP | \
RC_BIT_XMP)
RC_BIT_XMP | RC_BIT_CEC)
#define RC_SCANCODE_UNKNOWN(x) (x)
@ -123,6 +125,7 @@ void rc_map_init(void);
#define RC_MAP_BEHOLD_COLUMBUS "rc-behold-columbus"
#define RC_MAP_BEHOLD "rc-behold"
#define RC_MAP_BUDGET_CI_OLD "rc-budget-ci-old"
#define RC_MAP_CEC "rc-cec"
#define RC_MAP_CINERGY_1400 "rc-cinergy-1400"
#define RC_MAP_CINERGY "rc-cinergy"
#define RC_MAP_DELOCK_61959 "rc-delock-61959"