Date: Tue, 17 Jan 2006 12:28:49 -0700 (MST) From: Warner Losh <imp@bsdimp.com> To: mistry.7@osu.edu Cc: freebsd-usb@freebsd.org Subject: Re: USB device implementation Message-ID: <20060117.122849.116442810.imp@bsdimp.com> In-Reply-To: <200601171326.16816.mistry.7@osu.edu> References: <1137462090.835.24.camel@yak.mseubanks.net> <20060117120347.zs7gpbs6jog80444@netchild.homeip.net> <200601171326.16816.mistry.7@osu.edu>
next in thread | previous in thread | raw e-mail | index | archive | help
> On Tuesday 17 January 2006 06:03, Alexander Leidinger wrote: > > "Michael S. Eubanks" <mse_software@charter.net> wrote: > > > Okay. I will look into it some more. I need to get better idea > > > of how the USB driver code works. It looks like there are only > > > minor differences between my current driver code and the NetBSD > > > code. With respect to any questions and changes I make, should I > > > contact mux@ directly using the email address listed on the > > > contributors page? > > > > Every FreeBSD committer should expect to get a mail with some > > questions, so mailing to mux@FreeBSD.org is not forbidden. :-) > > > > But he's not "the USB guy in the block". He just tries to port the > > uhidev code (maybe because he needs it). So don't expect an answer > > to every question. > > > > Unfortunately we don't have an active USB guru around, except > > Hans-Petter Selasky (not a FreeBSD committer), but he develops a > > rewritten-from-scratch USB stack. So don't expect him to be able to > > answer questions reagarding the USB stack in -current. > From my personal experience and just looking at the commiter that has > been touching the usb files I'd add Ian Dowse <iedowse@freebsd.org> > to that short guru list. He has been pretty busy recently, but if > you're willing to do your homework I'm sure he'd be happy to answer > any questions. I've also been doing a bunch inside the usb stack, although not having enough time either. > > So far HPS wasn't able to convince a committer to import his work. > > Partly because we think that a USB stack which is shared between > > the BSD's may be better, partly because the existing stack seems to > > work good enough for those committers which may be willing to > > import the new one or be able to mentor HPS. > As Warner said it takes time to work through such a large change. > Hans-Petter Selasky stack is trying to be free of the GIANT lock and > that's a bit tricky with USB, but ultimately the direction we are > heading for 7.0. Yes. There's also some concerns over the safety of the novel locking scheme that has been proposed for usb that take a lot of time and energy to work out. Eg, are they any better than the stock tools, does it work? Does it fill a void in our stock tools? etc Warner
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20060117.122849.116442810.imp>