ucom serial bug?

[M. Warner Losh]

In message: <200812041853.35539.hselasky at c2i.net>
            Hans Petter Selasky <hselasky at c2i.net> writes:
: On Thursday 04 December 2008, Mike Tancsa wrote:
: > At 02:33 PM 12/3/2008, Gabor wrote:
: > >everything works fine.  When we try to use a USB to serial
: > >converter(type doesn't matter, UFTDI or Prolific) we run into
: > >problems. The first time we start up our side, everything
: > >works.  The second time we don't get carrier(DCD).  The other side
: > >is always running. Since we have no control
: >
: > Also tried with the usb2 development stack, and we never see carrier.
: >
: > Id Refs Address    Size     Name
: >   1   20 0xc0400000 9f8014   kernel (/boot/kernel/kernel)
: >   2    1 0xc4b95000 3000     usb2_serial_ftdi.ko
: > (/boot/kernel/usb2_serial_ftdi.ko)
: >   3    5 0xc4b99000 36000    usb2_core.ko (/boot/kernel/usb2_core.ko)
: >   4    1 0xc4c56000 4000     usb2_serial.ko (/boot/kernel/usb2_serial.ko)
: >   5    1 0xc4cb4000 a000     usb2_controller_uhci.ko
: > (/boot/kernel/usb2_controller_uhci.ko)
: >   6    2 0xc4cbe000 3000     usb2_controller.ko
: > (/boot/kernel/usb2_controller.ko)
: >   7    1 0xc4d50000 d000     usb2_controller_ehci.ko
: > (/boot/kernel/usb2_controller_ehci.ko)
: >
: 
: Hi,
: 
: I think this event is not implemented in the driver. Try to diff the NetBSD 
: and FreeBSD uftdi.c files.

I have some diffs in my inbox from someone that was trying to
implement modem control for uftdi chips.  Let me see if they make
sense...

Warner