[ Please keep all reciepents in your replies. ] On Tue, Mar 27, 2012 at 08:01:26PM +0000, tilman wrote: > Hello Johan > > > What kind of device are we talking about? And what speeds? > usb-to-serial based on an AN2131Q (Eazy USB) and a ST16C550(UART). > Speed is up to 460,8 kBaud That's relatively slow. There should be no problem using the generic implementation (which can handle high speeds as well). > > You really should try to use the generic write before implementing your > > own. > The generic write function works as well. I have not tested at high speeds > though. The generic write function however has no way of knowing the current > fill level of the tx buffer (EP3IN provides the available bytes in tx queue, and > bytes received and stored into rx queue). And besides that, where is the > challenge in using the generic function ? :-) Well, you shouldn't reinvent the wheel unless you have to. The generic implementation is efficient and well-debugged. If you want (and need) to take the fill-level information into account you should investigate whether it's would be sufficient to hook into the generic implementation before implementing from scratch. Good luck, Johan -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
