On Sun, 13 Nov 2005 11:10:19 -0500 (EST) Alan Stern <[EMAIL PROTECTED]> wrote:
> On Sun, 13 Nov 2005, Johannes Zweng wrote: > > > 1.) When I plug in the phone and it's using configuration 1 (AT > > modem mode) "bNumConfigurations" reports 2 available > > configurations, but AFTER SWITCHING to configuration 2 it only > > reports one available configuration (via "bNumConfigurations"). > > What exactly do you mean: via "bNumConfigurations"? Do you mean that > > "lsusb -v" reports a different value? Does the value in > /proc/bus/usb/devices change? What about the value in the sysfs > file? (Those last two should _not_ be able to change unless the > phone disconnects itself.) I checked the value in /sys/bus/usb/devices/4-2/bNumConfigurations And this value definitly changes to 1 after switching to configuartion 2 by doing "echo 2 > /sys/bus/usb/devices/4-2/bConfigurationValue". So it's not possible to switch back to configuration 1 the same way because the device claims to have only one configuration after the change. > > 2.) Also the device id of the device changes from "22b8:4902" to > > "22b8:4902" when I change to configuration 2. > > Those two values are in fact the same. I'll assume you meant one of > them to be different. > > Again, where do you determine these ID values? Yes, this was a typo, sorry. The device id changes from 22b8:4902 to 22b8:4901. I determined this values via sysfs in "idVendor" and "idProduct". But "lsusb -v" also reports these values. To give you an idea what happens during the configuration switch, here an extract of udevmonitor's output while switching to configuration 2: UEVENT[1131897292] remove@/devices/pci0000:00/0000:00:11.2/usb4/4-2/4-2:1.0 UEVENT[1131897292] remove@/devices/pci0000:00/0000:00:11.2/usb4/4-2/4-2:1.1 UEVENT[1131897292] remove@/devices/pci0000:00/0000:00:11.2/usb4/4-2 UEVENT[1131897295] add@/devices/pci0000:00/0000:00:11.2/usb4/4-2 UEVENT[1131897295] add@/devices/pci0000:00/0000:00:11.2/usb4/4-2/4-2:1.5 UEVENT[1131897295] add@/devices/pci0000:00/0000:00:11.2/usb4/4-2/4-2:1.6 UEVENT[1131897295] add@/devices/pci0000:00/0000:00:11.2/usb4/4-2/4-2:1.8 > > So I just wanted to ask, if it's legal for an usb device to have a > > configuration where the interfaces are not numbered beginning from > > 0? > > No, it isn't. Some manufacturers do it anyway. Linux accepts such > devices and will work with them, but prints out the warning messages > you saw in the log. > > > I don't have much knowledge on usb specifications and I didn't find > > some info about this in the usb specifications (until now). > > In the USB 2.0 spec, read the entry for bInterfaceNumber in Table > 9-12. See also the paragraph at the bottom of p. 244 (section > 9.2.3). Thanks, these are exactly the parts of the document I was searching for. So this means that the Motorola V3 is not completely USB 2.0 compliant. Thanks for the infos so far, johannes ------------------------------------------------------- SF.Net email is sponsored by: Tame your development challenges with Apache's Geronimo App Server. Download it for free - -and be entered to win a 42" plasma tv or your very own Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
