Re: usb2 iscochronous transfer

Hans Petter Selasky wrote:

On Thursday 23 February 2006 17:41, Peter B wrote:
Is there any work at all on usb2 isochronous transfer functionality?

It's already implemented!


http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/dev/usb/ehci.c?rev=1.14.2.10&;
content-type=text/x-cvsweb-markup

* 1) The EHCI driver lacks support for isochronous transfers, so
* devices using them don't work.

Any hints on what's needed to make it work?

My new USB driver supports it.
http://www.turbocat.net/~hselasky/usb4bsd


Seems DVB-S receiver cards use usb2-isoc mode, therefore the need.


Maybe you want to try out the new USB API when designing the driver. Don't
forget that high-speed isoc have 8 frames per millisecond!

PS: My USB driver in SVN is now also compiling and working on NetBSD 3.X.

How is integration to the FreeBSD CVS ..? (commited?)

Considering fully working usb1/usb2 ctrl/intr/bulk/isoc working modes and
finegrained locks. It seems better than the current one.

How is uaudio and umass working with this driver?, what version of freebsd
works best with this new usb-driver? (I will likely use ugen for dvb-s)

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