Re: User land drivers.

[Takashi Iwai <tiwai@suse.de>]

At Tue, 31 Aug 2004 11:45:02 +0100,
James Courtier-Dutton wrote:
> 
> 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 ?

Why do you need to *create* /dev?
When you access through alsa-lib, you don't need a device file.

> Alternatively, could we provide a new plugin method, so we can add 
> userland PCMs, Mixer, etc.

Exactly.


Takashi


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