Re: [Line6linux-devel] Getting line6usb past staging

[Stefan H. <ste...@gm...>]

On Fri, Nov 2, 2012 at 9:02 PM, "L. Alberto Giménez"
<agi...@sy...> wrote:
> El 02/11/2012 8:02, Stefan Hajnoczi escribió:
>> Ping?
>
> Hi Stefan,
>
> I'm interested in helping with the driver code (or user-space
> applications or wharever).
>
> Unfortunately, right now my Linux box is dead and I'm waiting for a
> motherboard/CPU replacement. When i get everytning running up, I will be
> able to test/help.
>
> By the way, what codebase are you currently working on? The official
> kernel staging code? or do you use another personal repository?

I write small changes against linux.git.  For bigger changes I send
patches against the subversion repo so Markus can review and send a
pull request to Greg KH.

> We may set up a github repository for the cleanup process. I think that
> a lot of changes will be needed since the current code is quite old and
> a lot of interfaces and kernel policies may have changed.

The code builds against the latest linux.git so there is nothing
terribly bitrotted.  I think the next step is to ask the ALSA
maintainers to review the code.  It would be appropriate for Markus to
make that request, since he's the maintainer.  This is why I'm pinging
him - I don't want to bypass him by making that request myself.

> I'm *very* interested in setting up a DAW system in my Linux box using
> my HD 500, so I could really help, but my knowledge on audio devices and
> kernel developement is very limited.
>
> I can provide USB dumps (I have a Windows machine with the HD Edit
> software installed), if we want to reverse engineer the application
> protocol.

Hopefully getting the HD500 working won't be too hard.  Markus has
written about USB capture here:

http://www.tanzband-scream.at/line6/usblog.html

(I have also had success with Windows running under KVM with Linux
usbmon capture.)

If you capture logs of a few common scenarios like plugging the device
in, recording audio, and starting the HD Edit software, then it should
be possible to figure out how to make the HD500 work.

Stefan