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.

Current supported devices:
 - Edirol FA-66/FA-101
 - PreSonus FIREBOX/FIREPOD
 - BridgeCo RDAudio1/Audio5
 - Mackie Onyx 820/1220/1620/1640 (Firewire I/O Card)
 - Mackie d.2 (Firewire Option)
 - Stanton FinalScratch 2 (ScratchAmp)
 - Tascam  IF-FW DM
 - Apogee Rosetta 200/Rosetta 400 (X-FireWire card)
 - Apogee DA-16X/AD-16X/DD-16X (X-FireWire card)
 - ESI Quotafire610
 - AcousticReality eARMasterOne
 - CME MatrixKFW
 - Phonic HB12/12 MkII/12 Universal
 - Phonic HB18/18 MkII/18 Universal
 - Phonic HB24/24 MkII/24 Universal
 - Phonic FireFly 202/302
 - Lynx Aurora 8/16 (LT-FW)
 - ICON FireXon
 - PrismSound, Orpheus/ADA-8XR

Devices possible to be supported if identifying IDs:
 - PreSonus Inspire 1394
 - Mackie Digital X Bus x.200/400
 - CME UF400e
 - Infrasonic DewX/Windy6
 - Rolf Spuler Firewire Guitar
bebob: Add command and stream management

This commit adds BridgeCo's AV/C extension commands and connection/stream
management. The driver can get channel combination with the commands.
bebob: Add proc interface for debug

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 with 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 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.
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 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 with usual firmware. They are:
 - Firewire 410
 - Firewire AudioPhile
 - Firewire Solo
 - Ozonic
 - NRV10
 - FirewireLightBridge

This commit adds M-Audio quirks for channel mapping and specific operations to
get metering information. The metering information also includes status of clock
synchronization if the model supports to switch source of clock.

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 firmware.
 - Firewire Audiophile also waits to download firmware but the vendor/model id
   is the same as the one after loading firmware.
 - The information of channel mapping is invalid.

This module don't support to upload firmware.

The specification of FirewireLightBridge is unknown. So in this time, normal
operations are applied for this model.
bebob: Add support for M-Audio special Firewire series

This commit allows this driver to support some models which M-Audio produces
with DM1000 but its firmware is special. They are:
 - Firewire 1814
 - ProjectMix I/O

They have heavily customized version of BeBoB firmware. The usual operations
can't be applied to them. For this reason, this commit adds some model specific
members in 'struct snd_bebob' and model specific functions. Some parameters are
write-only so this commit also adds control interface for them.

M-Audio special firmware quirks:
 - Just after powering on, they wait 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 firmware.
 - They don't respond against BridgeCo extension commands. So drivers can't get
   their stream formations.
 - They do not start to transmit packets only by establishing connection, but
   also by receiving SIGNAL FORMAT command.
 - They can't handle frequent transactions. In this reason, this driver often
   fail to handle them.

This module don't support to upload firmware.
bebob: Send a cue to load firmware for M-Audio Firewire series

This commit is optional. The purpose of this commit is to help testers.

Just powering on, these devices below wait to download firmware.
 - Firewire Audiophile
 - Firewire 410
 - Firewire 1814
 - ProjectMix I/O

But firmware version 5058 or later, flash memory in the device store it. So
this driver can tell the device to load the firmware by sending a certain cue.

I think this functionality should be implemented in user-land.