Re: Device failing to enumerate with EHCI
David Brownell <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
On Saturday 24 March 2007 11:58 am, Oliver Neukum wrote: > Am Freitag, 23. März 2007 20:08 schrieb David Brownell: > > > ... 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 ... > > So not clearing and retrying is a bug? Retrying wouldn't do much good now would it? I'd say that devices needing such a clear-halt are worth a quirk flag. This is a quirk that should (only?) be autodetected. > > Linux "should" handle such oddball devices. Is it clear that this > > is one of those cases? > > How do I find out? If the quirk is set, you have the answer. :) I suggest that when ep0 stalls you look at its endpoint status to see if the HALT bit is set ... if it is, set the quirk flag. - Dave ------------------------------------------------------------------------- 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