Serial console

[JohnsonCheng]

Dear Daniel,

I also meet this problem on MPC8245 with linux-2.6.12.3, and I found it uses
LEVEL for interrupt in sandpoint.c. Do you have any idea for it?

Thanks,
Johnson Cheng

-----Original Message-----
From: linuxppc-embedded-bounces at ozlabs.org
[mailto:linuxppc-embedded-bounces at ozlabs.org] On Behalf Of Daniel Ann
Sent: Monday, August 01, 2005 9:27 AM
To: Anton Wöllert
Cc: linuxppc-embedded at ozlabs.org
Subject: Re: Serial console

Thanks for your input Anton.
I'm not all that certain about sandpoint platform has its own serial
driver so I've worked with 8250.c. Anyway, I've got it working now. It
was problem with interrupt. As soon as I changed interrupt from EGDE
to LEVEL it began working. Altho I'm faced with yet another problem
with openpic but I'm digging thru it at the moment.

BTW, I have no idea why EDGE didnt work and LEVEL does.

Cheers,
Daniel

On 7/30/05, Anton Wöllert <a.woellert at gmail.com> wrote:
> Daniel Ann wrote:
> > Hi folks,
> >
> > Having all the kernel boot up log on console means that I've done some
> > part right. But why am I not getting anything from the user processes
> > on the console screen ?
> >
> > Is there anything I need to do on the kernel config ?
> >
> 
> Hi, we've had the same problem some time ago on a tqm850l (mpc850). Our
> problem was, that we had registered two serial consoles in the kernel
> config or something like that. we had to disable all serial-driver stuff
> and enable just the platform-specific serial-console driver. we tracked
> this down with inserting a printk(buf) into the tty_write fs-op of the
> serial-port driver in drivers/char/tty_io.c. the ttyS0 was used but has
> taken another serial-driver than the platform specific.
> 
> may this help you :)
> 
> 
> anton
> 


-- 
Daniel
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