Serial console

[Kumar Gala]

On Aug 1, 2005, at 10:38 PM, JohnsonCheng wrote:

> 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?

All internal interrupts on the MPC8245/1 should be LEVEL interrupts.

- kumar

> -----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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