3 apr 2014 kl. 17:54 skrev Daniel Mack <daniel@xxxxxxxxxx>: > On 04/03/2014 03:12 PM, Anders Genell wrote: >> I have a Marian UCON-CX external usb sound card. It is to the best of my >> knowledge not class compliant at all. It is not maintained by Marian any >> longer, and only supported up to Windows XP, which as of the end of this >> week is not maintained itself. >> >> I have emailed the Marian devs and they will not release a driver for >> e.g. Win7/8, nor will they release any code for third party (linux) >> developement. >> >> The sound card is hence basically an expensive paper weight. >> >> As far as I can guess, the card needs some blob uploaded at startup to >> function. I have the original driver disk, but I am unsure if it >> contains a complete binary blob, or if there is some MS voodoo going on >> as well. > > Some cards just hide their class compliant interfaces behind vendor > specific descriptors in order to escape the stupidness of the Windows > USB stack. Others implement a completely proprietary protocol. Without > looking into the communication, it's impossible to tell. > >> If anyone would like to take a stab at reverse engineering a linux >> module for this card, I'd be happy to lend my card. > > I think a good first step would be to trace the communication between > the driver and the card using a software analyzer. Either on the Windows > side, or on Linux with usbmon, together with a VM such as VirtualBox. > Thanks! I might be able to set up an old laptop I have laying around with e.g. Debian and with a VirtualBox running XP SP3. > It might be worth the effort, the hardware actually looks quite > advanced, according to the specs on their website. > > > Daniel I could grant remote ssh access if someone would give it a shot - I'm not all that well versed in the usbmon-audio-device-communication world... Regards, Anders ------------------------------------------------------------------------------ _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
