Date: Fri, 4 Jan 2013 22:42:30 +0100 From: Hans Petter Selasky <hselasky@c2i.net> To: freebsd-usb@freebsd.org Cc: Lowell Gilbert <Lgfbsd@be-well.ilk.org> Subject: Re: auto-dismount fake CD (was Re: Android device problems with MTP ID) Message-ID: <201301042242.30325.hselasky@c2i.net> In-Reply-To: <4438ygbplz.fsf_-_@be-well.ilk.org> References: <44d2xmrrfp.fsf@lowell-desk.lan> <201301032104.54225.hselasky@c2i.net> <4438ygbplz.fsf_-_@be-well.ilk.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Friday 04 January 2013 22:33:12 Lowell Gilbert wrote: > Hans Petter Selasky <hselasky@c2i.net> writes: > > On Thursday 03 January 2013 20:58:15 Lowell Gilbert wrote: > >> Hans Petter Selasky <hselasky@c2i.net> writes: > >> > On Thursday 03 January 2013 20:34:50 Lowell Gilbert wrote: > >> >> On my (updated to Android 4.1.1) phone, MTP only works if the phone's > >> >> USB debugging option is enabled. If it is, usbconfig(8) sees a > >> >> ugen(4) interface of MTP type; but otherwise it just shows up as a > >> >> CD device. > >> > > >> > Try to use cdcontrol to eject the CD. > >> > >> Thanks! That works! [And I can see the logic behind it, even, from a > >> firmware point of view.] > >> > >> I should be able to automate the eject command through devd, I think. > >> It would be nice to put something in the tree that would do that, but > >> being sure not to catch cases you'd want such a feature would be > >> error-prone. > >> > >> I'll move forward on making MTP more convenient on FreeBSD. A lot of > >> devices are starting to force it on us, and it keeps the device usable > >> while the computer is accessing its files. > >> > >> Thanks again! > >> > >> Be well. > >> > >> Lowell > > > > There might be a quirk for that. > > > > See usbconfig, and send a patch for that if you figure it out :-) > > I was wrong about being able to do this in userland; devd doesn't have > the device name, and devfs doesn't have enough information to identify > the disk as being bogus (as well as not currently having a mechanism to > do anything to the device except ownership/permissions/etc.). > > So I guess a quirk would be the best way to do it, and I don't see any > existing functionality that even resembles this. Is this something that > would be worth my while to create? > > I wouldn't mind writing it if it were generally useful, but I don't know > for a fact that anyone else would want to use it. A scheme flexible > enough to have a hope of working with future devices would be > substantially more complicated than I need for my own purposes, so I'd > like to know if anyone else would want it also. > See the serial/u3g.c driver and usb/usb_msctest.c and look for SCSI EJECT. --HPS
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201301042242.30325.hselasky>