I tested the patches today, and looks like problem remained same, but I am able to get it compiled without any errors. I am able to detect OSK5912 as "low speed USB device using uhci_hcd". I think it should get detected as full speed device. but problem of getting every typed character twice remained same, and also all things are not stable enough.
Is everything works fine at your place?
Yes, I am also still seeing some issues. From my testing, stdin over usbtty seems to work fine, but as soon as I re-direct stdout to usbtty all hell breaks loose. Originally, when directing stdout over usbtty I did not see anything, but after I enabled some debugging statements in the usb driver, I then started to see messages printed twice.
I recall that this did work with release 1.1.6, so it could be interesting to go back to 1.1.6 and see if it does work.
Cheers Jon