On Mon, 25 Oct 2010, Hans de Goede wrote: > Hi All, > > The last 3 days I've been working on (*) getting a few usb-1.1 > webcams to work when connected through a usb-2.0 hub. > > *) And also doing a lot of reading of ehci-sched.c and the usb 2.0 > standard. > > This mail is an attempt to organize my thoughts, point out > what I believe are bugs in the current code and suggest some > enhancements. I haven't read through your entire message; it was pretty long. But before you go too far, you should look at these threads from over a year ago: http://marc.info/?t=123819006900007&r=1&w=2 http://marc.info/?t=124404685600001&r=1&w=2 They probably incorporate much of what you have discovered -- along with a lot of extra confusion and irrelevancies. :-) Although a lot of problems were discussed and identified, no code has been written yet. That's mostly because I have been working on lots of other things and this looks like it will be a big job. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
