Re: usb vs. drivers
On Tuesday 30 November 2004 06:48 am, Christian Convey wrote:
> >>Another thing maybe you can clarify for me:
> >>Suppose that my camera supports a USB mass storage interface as
> >> well as a camera (PTP?) interface. Is it the case that only one
> >> driver at a time, either mass-storage or ptp, is allowed to bind
> >> to the camera (i.e., /proc/bus/usb/001/005) ?
> >
> > Probably true, but seems that the PTP support is not present on the
> > kernel. Accordingly to this documentation
> > (http://www.teaser.fr/~hfiguiere/linux/digicam.html), your camera
> > is supported via
> > gphoto2/ptp, so maybe this excludes usb-storage... =)
> >
> >>Is it also the case that the usb-mass-storage driver is part of the
> >>kernel, whereas the ptp driver might actually be built directly
> >> into an application such as gphoto2?
> >
> > Yes. Seems that you need to install "gtkam" or "gphoto2".
> >
> > Andrea
>
> I do have gphoto2 installed. It has a rule in /etc/hotplug/usb/ so
> that when the camera is plugged in, its entry in /proc/bus/usb... is
> altered: the owner is made to be root:camera, and its permissions are
> set to 660.
>
> But it seems to me that such a script doesn't actually bind a driver
> to the device. That should leave open the possibility that
> usb-mass-storage can pick up the camera.
>
> I could understand if I'm getting only a mass storage device
> (/dev/sda1) or gphoto2 works with the camera, but in reality neither
> is happening. Gphoto2 tells me it can't find a camera.
>
> Thanks for the link to
> http://www.teaser.fr/~hfiguiere/linux/digicam.html. I'll check that
> out, and maybe harass the gphoto2 maillist ;)
>
Try this also.
http://gphoto.org/doc/manual/permissions-usb.html
--
Greg C. Madden
Reply to: