alsaucm: add a man page, generated from reStructuredText

Signed-off-by: Antonio Ospite <ao2@ao2.it>
Acked-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

alsaucm/Makefile.am

@@ -1,9 +1,16 @@
 bin_PROGRAMS = \
         alsaucm
 
+if USE_RST2MAN
+man_MANS = alsaucm.1
+endif
+
 alsaucm_SOURCES = usecase.c
 
 AM_CPPFLAGS = \
          -Wall -I$(top_srcdir)/include
 
 alsaucm_LDADD = -lasound
+
+%.1: %.rst
+	rst2man $< > $@

alsaucm/alsaucm.rst

@@ -0,0 +1,235 @@
+=========
+ alsaucm
+=========
+
+---------------------
+ALSA Use Case Manager
+---------------------
+
+:Author: Antonio Ospite <ao2@ao2.it>
+:Date:   2016-09-22
+:Copyright: GPLv2+
+:Manual section: 1
+:Manual group: General Commands Manual
+
+SYNOPSIS
+========
+
+*alsaucm* <options> [command]
+
+DESCRIPTION
+===========
+
+alsaucm (ALSA Use Case Manager) is a program to use the ALSA `Use Case
+Interface`_ from the command line.
+
+On complex sound cards, setting up audio routes is not trivial and mixer
+settings can conflict one another preventing the audio card to work at all.
+
+The ALSA Use Case Manager is a mechanism for controlling complex audio
+hardware establishing a relationship between hardware configurations and
+meaningful use cases that the end-user can relate with.
+
+The use case manager can also be used to switch between use cases when
+necessary, in a consistent way.
+
+At a lower level, the use case manager works by configuring the sound card
+ALSA kcontrols to change the hardware digital and analog audio routing to
+match the requested device use case.
+
+The use case manager kcontrol configurations are stored in easy to modify text
+files. An audio use case can be defined by a **verb** and **device** parameter.
+
+The verb describes the use case action i.e. a phone call, listening to music,
+recording a conversation etc. The device describes the physical audio capture
+and playback hardware i.e. headphones, phone handset, bluetooth headset, etc.
+
+
+OPTIONS
+=======
+
+Available options:
+
+  **-h**, **--help**
+    this help
+
+  **-c**, **--card** `NAME`
+    open card NAME
+
+  **-i**, **--interactive**
+    interactive mode
+
+  **-b**, **--batch** `FILE`
+    batch mode (use ``'-'`` for the stdin input)
+
+  **-n**, **--no-open**
+    do not open first card found
+
+
+Available commands:
+
+  ``open`` `NAME`
+    open card NAME.
+
+    valid names are sound card names as listed in ``/usr/share/alsa/ucm``.
+
+  ``reset``
+    reset sound card to default state.
+
+  ``reload``
+    reload configuration.
+
+  ``listcards``
+    list available cards.
+
+  ``list`` `IDENTIFIER`
+    list command, for items returning two entries (value+comment).
+
+    the value of the `IDENTIFIER` argument can can be:
+
+    - ``_verbs`` - get verb list (in pair verb+comment)
+    - ``_devices[/{verb}]`` - get list of supported devices (in pair device+comment)
+    - ``_modifiers[/{verb}]`` - get list of supported modifiers (in pair modifier+comment)
+
+    The forms without the trailing ``/{verb}`` are valid only after a specific
+    verb has been set.
+
+  ``list1`` `IDENTIFIER`
+    list command, for lists returning one item per entry.
+
+    the value of the `IDENTIFIER` argument can vary depending on the context,
+    it can be:
+
+    - ``TQ[/{verb}]`` - get list of Tone Quality identifiers
+    - ``_enadevs`` - get list of enabled devices
+    - ``_enamods`` - get list of enabled modifiers
+    - ``_supporteddevs/{modifier}|{device}[/{verb}]`` - list of supported devices
+    - ``_conflictingdevs/{modifier}|{device}[/{verb}]`` - list of conflicting devices
+
+  ``get`` `IDENTIFIER`
+    get string value.
+
+    the value of the `IDENTIFIER` argument can can be:
+
+    - ``_verb`` - return current verb
+    - ``[=]{NAME}[/[{modifier}|{/device}][/{verb}]]`` (For valid NAMEs look at the
+      ALSA `Use Case Interface`_)
+
+
+  ``geti`` `IDENTIFIER`
+    get integer value.
+
+    the value of the `IDENTIFIER` argument can can be:
+
+    - ``_devstatus/{device}``
+    - ``_modtstaus/{device}``
+
+  ``set`` `IDENTIFIER` `VALUE`
+    set string value
+
+    The value of the `IDENTIFIER` argument can can be:
+
+    - ``_verb`` - set the verb to `VALUE`
+    - ``_enadev`` - enable the device specified by `VALUE`
+    - ``_disdev`` - disable the device specified by `VALUE`
+    - ``_swdev/{old_device}`` - switche device:
+
+      - disable `old_device` and then enable the device specified by
+        `VALUE`
+      - if no device was enabled just return
+
+    - ``_enamod`` - enable the modifier specified by `VALUE`
+    - ``_dismod`` - disable the modifier specified by `VALUE`
+    - ``_swmod/{old_modifier}`` - switch modifier:
+
+      - disable `old_modifier` and then enable the modifier specified by
+        `VALUE`
+      - if no modifier was enabled just return
+
+    Note that the identifiers referring to devices and modifiers are valid
+    only after setting a verb.
+
+  ``h``, ``help``
+    help
+
+  ``q``, ``quit``
+    quit
+
+
+FILES
+=====
+
+The master use case files for each supported sound card are in ``/usr/share/alsa/ucm``.
+
+For example, the master use case file for the `Pandaboard` card is in
+``/usr/share/alsa/ucm/PandaBoard/PandaBoard.conf``, this file lists all the
+supported use cases, e.g.
+
+::
+
+  SectionUseCase."HiFi" {
+                  File "hifi"
+                  Comment "Play HiFi quality Music."
+  }
+  ...
+
+
+Each use case defines a _verb, which is described in the file specified in
+the ``File`` directive, like above.
+
+The ``HiFi`` verb above is described in
+``/usr/share/alsa/ucm/PandaBoard/hifi``.
+
+For more details on the syntax of UCM files, see the alsa-lib source code:
+http://git.alsa-project.org/?p=alsa-lib.git;a=blob;f=src/ucm/parser.c
+
+
+EXAMPLES OF USE
+===============
+
+Some commands, like for instance ``list _devices``,
+can only work after setting a ``_verb`` in the **same execution**, for
+instance this sequence doesn't work:
+
+::
+
+  # alsaucm -c bytcr-rt5640 set _verb HiFi
+  # alsaucm -c bytcr-rt5640 list _devices
+
+
+However this command does:
+
+::
+
+  # alsaucm -n -b - <<EOM
+  open bytcr-rt5640
+  set _verb HiFi
+  list _devices
+  EOM
+
+
+An example of setting the `Speaker` device for the `HiFi` verb of the
+`bytcr-rt5640` card:
+
+::
+
+  # alsaucm -n -b - <<EOM
+  open bytcr-rt5640
+  reset
+  set _verb HiFi
+  set _enadev Speaker
+  EOM
+
+
+
+SEE ALSO
+========
+
+* Use Case Interface: http://www.alsa-project.org/alsa-doc/alsa-lib/group__ucm.html
+
+.. _Use Case Interface: http://www.alsa-project.org/alsa-doc/alsa-lib/group__ucm.html
+
+BUGS
+====
+
+None known.