On Tue, May 30, 2000, Daniel Streetman <[EMAIL PROTECTED]> wrote:
> On Tue, 30 May 2000, Johannes Erdfelt wrote:
>
> > > So I'm wondering how to get full topology information by reading
> > > (or ioctl?) individual device nodes (bus#/dev#), but it looks to me
> > > (in 2.4.0-test1) that a read will only get the (binary) device
> > > descriptor. I saw a post by Johannes Erdfelt stating that the config
> > > descriptors should follow the device descriptor (do they?).
> >
> > This was part of a recent patch. The patch is not in 2.4.0-test1.
>
> Sweet, I'll get pre-10...
It's not in pre-10. That's a step backwards. Look for the -ac releases.
> > My last patch adds most of the rest of the information to usbdevfs. It
> > does not add topology information yet, however David Brownell has some
> > ideas on how to do that. I'm sure some patches will be developed in the
> > next couple of days.
>
> As long as I can get all the descriptor info I can do the topology no
> problem (assuming the parent hub is somewhere in the info...?)
That's not in the descriptor information.
> > > Oh - as a side note, I saw a lot (a LOT) of discussion on linux-usb
> > > about moving usbdevfs completely to devfs...? Is this so, and does
> > > that mean it will not work as a mountable fs anymore?
> >
> > It would implicitility be mounted since it would be part of devfs. The
> > patch completely removes the VFS portion of usbdevfs in favor of using
> > devfs. If you have devfs mounted, then /dev/usb would just appear.
>
> So, this means I *must* use devfs...
If you use the patch (which is seperate from the other patch I
mentioned with the config descriptors, etc).
> > Unfortunately, not everyone wants this patch.
>
> I think getting all descriptor info is great; moving usbdevfs completely
> to devfs tho...
>
> I'm just wondering if it's possible to leave the VFS
> temporarily, or possibly have devfs and VFS access...?
>
> No a big deal tho. I can move to devfs without complaint.
Linus has said no to the patch. I won't touch the topic in this email.
What this means for you right now is that usbdevfs must be manually
mounted at /proc/bus/usb
JE
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