Re: Serial design

[Vojtech P. <vo...@su...>]

On Wed, Dec 26, 2001 at 03:43:29PM -0800, James Simmons wrote:

> > This sounds a somewhat Microsofty solution.  Do we really want the kernel
> > sending stuff like 'AT' commands at various baud rates to the connected
> > machine, which might be waiting for you to "press any key" after changing
> > the floppy?
> 
> I never said anything about sending AT commands. For example in
> serial_8250_pci.c you have serial_pci_guess_board. Knowing that we have
> a modem means we can only use a TTY interface for that port. Unless the 
> device is hotpluggable. A input interface wouldn't make sense if we have
> a modem. If it is possible to see what type of device we have we can use
> that to determine what interface userland can have.

And in case we can't figure out in the kernel in a simple way (like the
first two serial ports on a Sun are keyboard and mouse) we simply make
it a tty, let the userland talk to it, decide what it sees there and
then tell the kernel back. What do you think?

-- 
Vojtech Pavlik
SuSE Labs