On Mon, Aug 30, 2010 at 10:51 AM, Piet Skiet <tuks...@gmail.com> wrote: > Hi, > > Can anyone clarify how to go about doing a synchronous usb control > transfer, similar to Linux's usb_control_msg? I want to implement the > TIOCMGET ioctl on a usb-to-serial converter. The Linux driver uses > synchronous control messages to read DCE and CTS serial pin status, > and I want to do something similar in FreeBSD. The usbdi(9) manpage > talks about control transfers using usbd_transfer_submit, but they're > not synchronous. What about using usbd_transfer_drain? Is there an > example driver showing setting up and doing control transfers? > > The ucom driver seems to only implement TIOCSBRK and TIOCCBRK iotcls > at the moment. > > Thanks >
Scanning through the ucom code, it seems to me that the usbd_do_request_proc has somehting to do with blocking control transfers. Am I on the right track here? _______________________________________________ freebsd-usb@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-usb To unsubscribe, send any mail to "freebsd-usb-unsubscr...@freebsd.org"
