Date: Mon, 26 Oct 2009 17:56:19 -0700 From: Marcel Moolenaar <xcllnt@mac.com> To: Matthew Fleming <matthew.fleming@isilon.com> Cc: freebsd-stable@freebsd.org Subject: Re: uart(4) on stable/7 Message-ID: <F3614014-9F52-4626-A804-78AB17137A37@mac.com> In-Reply-To: <06D5F9F6F655AD4C92E28B662F7F853E032DF8FA@seaxch09.desktop.isilon.com> References: <06D5F9F6F655AD4C92E28B662F7F853E032DF8FA@seaxch09.desktop.isilon.com>
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On Oct 26, 2009, at 2:57 PM, Matthew Fleming wrote:
> I can ssh to my box, echo to /dev/console appears on the console;
> messages on reboot appear on the console, just not the login prompt.
> Does anyone know what else I may be missing to use uart(4)?
As Andrew pointed put, you need to update /etc/ttys as well.
> Also, we have some boot scripts locally that will try to set
> machdep.conspeed based on hardware type; uart(4) doesn't seem to
> expose
> a sysctl by that name. How does the uart driver for stable/7 deal
> with
> differing console speeds?
uart(4) has 2 approaches for this:
1) you don't specify a speed -- in this case uart(4) will
simply re-use the speed that hardware is programmed for.
2) You do specify a speed - uart(4) will reprogram the
the console speed based on the hw.uart.console tunable.
Note that for compatibility with sio(4) hints can be
used as well. Use hint.uart.0.baud=9600 to set the
console speed to 9600 baud.
There's no compiled-in console speed. The compiled-in default
(in a way) is to use the speed the hardware is programmed for.
--
Marcel Moolenaar
xcllnt@mac.com
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