On 8/26/2016 12:48 AM, Felipe Balbi wrote: > > Hi, > > John Youn <john.y...@synopsys.com> writes: >> I was wondering if anyone is using the f_tcm function? Specifically >> for UAS in superspeed with streams? Any idea if it is being using in >> production for this anywhere? >> >> I've been trying to get the tcm gadget running without success. It >> seems I need to configure the target system via configfs and somehow >> interface it to this gadget. But I have not found any documentation or >> examples on how to get it working. Anyone have ideas or pointers? > > Sebastian has posted his scripts here several times, it's in the > archives :-)
I found some scripts before but none of them resulted in a working system. Though I did manage to get something semi-working eventually. It would still be nice to have some documentation about this part especially as I have no knowledge of the target side and no idea what those scripts are doing. > > There's also a TCM python tool somewhere which helps with this. I > haven't used f_tcm in a long while, but Sebastian and I used it long > back to test streams with dwc3. Have you tried it recently? Or do you know of anyone who has? > >> Just from the code it seems there will be some fundamental issues with >> it, such as the value of maxpacket size and some alt-interface >> stuff. At least when used with DWC3. > > such as? I'll see if I can write up the exact issues later. I have to go back to my notes to remind myself. But just in trying to get it to work, these issues make me suspect no one is using this driver in superspeed, or at least regularly testing it, let alone using it in production. > >> Also, would there be any interest in having a stand-alone UAS >> implementation in the kernel a la f_mass_storage? > > Probably not. We don't really duplicate stuff in the kernel, right? If > there are any bugs with f_tcm, let's fix them :-) > Regards, John -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
