User land drivers.

[James Courtier-Dutton <James@superbug.demon.co.uk>]

I have found that there are a number of different possible sound 
devices, where creating a user land driver would be beneficial to using 
a kernel module.
E.g. Bluetooth, Firewire etc.

Currently, we have:
user app(user)
     |
     V
alsa-lib(user)
     |
     V
alsa-driver(kernel)
     |
     V
hardware(kernel).

Bluetooth would prefer:
user app(user)
     |
     V
alsa-lib(user)
     |
     V
alsa-bluetooth-headset-profile(user)
     |
     V
bluetooth-driver(kernel)
     |
     V
hardware(kernel).


Would it be possible to have userland processes creating /dev/ files ?
Alternatively, could we provide a new plugin method, so we can add 
userland PCMs, Mixer, etc.

Any ideas?

James


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