Hi, On Tue, Mar 3, 2009 at 6:41 PM, Greg KH <greg@xxxxxxxxx> wrote: > On Tue, Mar 03, 2009 at 11:55:24AM +0100, Belisko Marek wrote: >> Hi, >> >> On Tue, Mar 3, 2009 at 7:29 AM, Greg KH <greg@xxxxxxxxx> wrote: >> > On Mon, Mar 02, 2009 at 02:36:55PM +0100, Belisko Marek wrote: >> >> Hi, >> >> >> >> My problem is that during init I should setup camera with different >> >> init data stream but cameras >> >> can have same vendor and product id (but different init data should be sent). >> >> >> >> Exist some way to distinquish between 2 USB devices with same vendor >> >> and product id? >> >> Don't have bcdDevice parameter. >> > >> > How do you know which device to send which init data to in the first >> > place? >> I'm trying to modify existing driver (not in main tree) for nw8xx chip based >> webcams(http://nw802.sourceforge.net/news.html). Driver works when it >> was compiled out of tree but first you should manually replace file >> with init data according webcam model and then compile. > > Ick, that's a mess. > >> I think about possibility to make it automatic, without manual copy. > > Yes, that would be good. > >> I know vendorid and product id ad during probe I think I can retrieve >> it and use. That was originally idea how to distiquish between >> cameras. But then problem come with same vendorid and productid. In >> this case driver wouldn't work properly because not correct init data >> sequence will be send to usb device. > > But if the device has the exact same descriptor, that would mean they > are the same type of devices, right? If not, then the manufacturer > really messed up. Yes you're right. I find those cameras with same descriptor: ProLink DS3303u,Plustek Opticam 500U vendor:0x06a5, product: 0xd001 D-link dru-350c vendor:0x06a5, product: 0xd001 Conceptronic Video Pro vendor:0x06a5, product: 0xd001 TwinkleCam vendor:0x06a5, product: 0xd001 Mustek vendor:0x06a5, product: 0xd001 I think this is because they use same camera engine (from divio) but they need different init configurations (maybee because of different CCDs). That's also very strange for me and I think it's not possible correctly distinguish between devices. I think I support only webcams with different descriptors. Then driver doesn't cover all devices ... egg-chicken problem ;) > > good luck, > > greg k-h > Marek -- as simple as primitive as possible ---------------------------------------------- Marek Beliško - open-nandra Ruská Nová Ves 219 08005 Prešov Slovakia http://open-nandra.com -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
