bebob: Add skelton for BeBoB based devices

This commit add a new driver for BeBoB based devices with no functionality. This driver just create/remove
card instance according to callbacks.

BeBoB is 'BridgeCo enhanced Breakout Box'. This is installed to firewire devices with
DM1000/1000E/1100/1500 chipset. It gives common way for host system to handle BeBoB based devices.

Current supported devices:
 - Edirol FA-66/FA-101
 - PreSonus FIREBOX/FIREPOD/FP10/Inspire1394
 - BridgeCo RDAudio1/Audio5
 - Mackie Onyx 1220/1620/1640 (Firewire I/O Card)
 - Mackie d.2 (Firewire Option)
 - Stanton FinalScratch 2 (ScratchAmp)
 - Tascam IF-FW DM
 - Behringer XENIX UFX 1204/1604
 - Behringer Digital Mixer X32 series (X-UF Card)
 - Apogee Rosetta 200/Rosetta 400 (X-FireWire card)
 - Apogee DA-16X/AD-16X/DD-16X (X-FireWire card)
 - Apogee Ensemble
 - ESI Quotafire610
 - AcousticReality eARMasterOne
 - CME MatrixKFW
 - Phonix Helix Board 12 MkII/18 MkII/24 MkII
 - Phonic Helix Board 12 Universal/18 Universal/24 Universal
 - Lynx Aurora 8/16 (LT-FW)
 - ICON FireXon
 - PrismSound Orpheus/ADA-8XR

Devices possible to be supported if identifying IDs:
 - Apogee Mini-Me Firewire/Mini-DAC Firewire
 - Behringer F-Control Audio 610/1616
 - Cakewalk Sonar Power Studio 66
 - CME UF400e
 - ESI Quotafire XL
 - Infrasonic DewX/Windy6
 - Mackie Digital X Bus x.200/400
 - Phonic Helix Board 12/18/24
 - Phonic FireFly 202/302
 - Rolf Spuler Firewire Guitar

Tested-by: Maximilian Engelhardt <maxi@daemonizer.de>
bebob: Add commands and connections/streams management

This commit adds management functionality for connections and streams.
BeBoB uses CMP to manage connections and uses AMDTP for streams.

This commit also adds some BridgeCo's AV/C extension commands. There are many
BridgeCo's AV/C extension commands but this commit adds below commands to get
device's capability and status:

 1.Extended Plug Info commands
  - Plug Channel Position Specific Data
  - Plug Type Specific Data
  - Cluster(Section) Info Specific Data
  - Plug Input Specific Data
 2.Extended Stream Format Information commands
  - Extended Stream Format Information Command - Single Request

For Extended Plug Info commands for Cluster Info Specific Data, I pick up
'section' instead of 'cluster' from document to prevent from misunderstanding
because 'cluster' is also used in IEC 61883-6.
bebob: Add proc interface for debugging purpose

This commit adds proc interface to get information for debugging.
 - firmware information
 - stream formation
 - current clock source and sampling rate
bebob: Add MIDI interface

This commit adds a functionality to capture/playback MIDI messages.

When no AMDTP streams are running, this module starts AMDTP stream at current
sampling rate for MIDI stream.
bebob: Add PCM interface

This commit adds a functionality to capture/playback PCM samples.

When AMDTP stream is already running for PCM or the source of clock is not
internal, available sampling rate is limited at current one.
bebob: Add hwdep interface

This interface is designed for mixer/control application. To use hwdep
interface, the application can get information about firewire node, can
lock/unlock kernel streaming and can get notification at starting/stopping
kernel streaming.
bebob: Prepare for device specific operations

This commit is for some devices which have its own operations or quirks.

Many functionality should be implemented in user land. Then this commit adds
functionality related to stream such as sampling frequency or clock source. For
help to debug, this commit adds the functionality to get metering information
if it's available.

To help these functionalities, this commit adds some AV/C commands defined in
'AV/C Audio Subunit Specification (1394TA).
bebob: Add support for Terratec PHASE, EWS series and Aureon

This commit allows this driver to support all of models which Terratec produced
with DM1000/BeBoB. They are:
 - PHASE 24 FW
 - PHASE X24 FW
 - PHASE 88 Rack FW
 - EWS MIC2
 - EWS MIC4
 - Aureon 7.1 Firewire

For Phase series, this commit adds a Terratec specific operation. To get source
of clock. AV/C Audio Subunit command is used.

For EWS series and Aureon, this module uses normal operations.
bebob: Add support for Yamaha GO series

This commit allows this driver to support all of models which Yamaha produced
with DM1000/BeBoB. They are:
 - GO44
 - GO46

This commit adds Yamaha specific operations. To get source of clock, AV/C Audio
Subunit command is used.

I note that their appearances are similar to some models of TerraTec; 'Go44' is
similar to 'PHASE 24 FW' and 'GO46' is similar to 'PHASE X24 FW'. But their
combination of Audio/Music subunit are a bit different.
bebob: Add support for Focusrite Saffire/SaffirePro series

This commit allows this driver to support all of models which Focusrite
produces with DM1000/BeBoB. They are:
 - Saffire
 - Saffire LE
 - SaffirePro 10 I/O
 - SaffirePro 26 I/O

This commit adds Focusrite specific operations:
1. Get source of clock
2. Get/Set sampling frequency
3. Get metering information

The driver uses these functionalities to read/write specific address by async
transaction.
bebob: Add support for M-Audio usual Firewire series

This commit allows this driver to support some models which M-Audio produces
with DM1000/DM1000E with usual firmware. They are:
 - Firewire 410
 - Firewire AudioPhile
 - Firewire Solo
 - Ozonic
 - NRV10
 - FirewireLightBridge

According to person of BridgeCo, Some models are produced with 'Pre-BeBoB'. This
means that these products were released before BeBoB was officially produced. So
these models have some quirks.

M-Audio usual firmware quirks:
 - Just after powering on, 'Firewire 410' waits to download firmware. This
   state is changed when receiving cue. Then bus reset is generated and the
   device is recognized as a different model with the uploaded firmware.
 - 'Firewire Audiophile' also waits to download firmware but its
   vendor id/model id is the same as the one after loading firmware.
 - The information of channel mapping for MIDI conformant data channel is
   invalid against BridgeCo specification.

This commit adds some codes for these quirks but don't support to upload
firmware.

This commit also adds specific operations to get metering information. The
metering information also includes status of clock synchronization if the model
supports to switch source of clock.

The specification of FirewireLightBridge is unknown. So in this time, normal
operations are applied for this model.
bebob: Send a cue to load firmware for M-Audio Firewire series

Just powering on, these devices below wait to download firmware.
 - Firewire Audiophile
 - Firewire 410

But firmware version 5058 or later, flash memory in the device stores the
firmware. So this driver can enable these devices by sending a certain cue to
load the firmware.
speakers: Rename to oxfw

This commit rename 'firewire-speakers' to 'oxfw' to enhance support for
devices based on OXFW970/971.

And a line is added for MODULE_ALIAS.
oxfw: Move to its own directory

Followed commits add much codes. I'll split them to some files.
In this reason, this commit make own directory and move current
source to it.
oxfw: Split stream functionality to a new file and add a header file

To make it easy to work in followed commit.

And this commit remove 'fw_unit_get()/fw_unit_put()' because these
are called by helper functions in 'snd-firewire-lib'.
oxfw: Split PCM functionality to a new file

To make it easy to work in followed commit.
oxfw: Split control functionality to a new file

To make it easy to work in followed commit.
oxfw: Change the way to name card

'struct snd_card' has 4 members for name. They're 'driver', 'shortname',
'longname' and 'mixername'. The 'driver' is used to detect card
Configuration file but the others are not used for important
functionality. So it's OK to name them with the information from config
ROM.

This commit adds 'name_card()' function and change the way to name card.
The 'driver' is still given by 'struct device_info'. The 'shortname' and
'mixername' is given by 'model' and the 'longname' is given by 'vendor'
and 'model'.
oxfw: Change the way to make PCM rules/constraints

For PCM rules/constrains, drivers need to know stream formation at each
supported sampling rates in advance. This commit adds
'struct snd_oxfw_stream_formation' to save formation information.

According to datasheet of OXFW970/971, they support 32.0kHz to 196.0kHz.
So this commit adds 'rx_stream_formations' member to 'struct snd_oxfw'. It's
an array with 7 elements. Each element corresponds to each sampling rate.

With these data structure, this commit changes the way to make PCM
rules/constraints.

I don't know whether Griffin/LaCie devices supports SINGLE/LIST subfunction
'AV/C Stream Format Information' command. So this commit adds codes to
generate formations for them.
oxfw: Add proc interface for debugging purpose

The previous commit adds stream formation. This commit adds proc interface
to get information about:
 - stream formation
 - current sampling rate