Now that I think about it again, though, it's probably only an issue for FS isochronous endpoints since they're the only ones that can even have an odd-sized MPS.
Hmm? I don't recall such constraints in any USB specs, but I might well have missed them.
I've not really used ISO on the net2280 yet -- is it behaving for you? Including high bandwidth modes?
I was actually trying to prove that a particular 1.1 host chipset could handle max-sized ISO transfers, and I couldn't find any devices off the shelf that had max-sized ISO endpoints. All of my testing was thus FS ISO, but it would certainly be easy to plug it into my HS hub. I'll do this at some point and let you know.
Does Intel's "USB2 Compliance Device" not let you configure such max sized ISO endpoints? Not that I have one; but that seemed to be the basic idea.
I had a similar problem to address... testing a patch recently submitted against the Linux ehci-hcd for better high speed ISO support! There's a shortage of software to test such things.
If you were using 2.6 for this testing, I could forward you a "gadgetfs" based user-mode driver that uses AIO to keep endpoint queues arbitrarily full of ISO traffic, and which is easy to reconfigure (just use different command-line flags). I won't be able to do high-speed testing for a while yet, there are a few fullspeed issues to resolve first.
- Dave
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