Re: Device failing to enumerate with EHCI
David Brownell <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
On Friday 23 March 2007 8:21 pm, Alan Stern wrote: > > ... no, that's a special case. Oddball devices that implement halt > > status on ep0 must allow clear-halt requests for it too. See 8.5.3.4 > > and (especially) the end of 9.4.5 ... > > Whoops! You're right. Sometimes those little details fade away from my > mind... > > > Linux "should" handle such oddball devices. Is it clear that this > > is one of those cases? > > I don't see any easy way to tell. The spec doesn't offer any good way to > tell the difference between one type of stall and the other. In fact, the > only way seems to be to send another request that _should_ always succeed > and see whether it does. You should be able to get the endpoint status and see if the HALT bit is set ... ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel