Re: SCC1 as serial console

Re: SCC1 as serial console

[a b]

experiment


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Re: SCC1 as serial console

[Ladislav Klenovi?]

HOW TO REPLY ON POSTS ?????????????????????? !!!!!!!!!!!!!!!!!!!

>-----P?vodn? spr?va-----
>Od: Ladislav Klenovi? [mailto:lk99336@pobox=2Esk]
>Odoslan?: 22=2E m?ja 2006 13:33
>Komu: linuxppc-embedded@ozlabs=2Eorg
>Predmet: SCC1 as serial console
>
>
>Hi,
>can anybody help me to setup the SCC1 port as serial console on MPC860=
 with kernel 2=2E6=2E15=2E4? I would like to use it as system console d=
uring the booting proccess=2E I can not get any output on serial consol=
e during booting proccess, I use uboot=2E
>
>thnx,
>regards ladislav
>
>
>_______________________________________________
>Linuxppc-embedded mailing list
>Linuxppc-embedded@ozlabs=2Eorg
>https://ozlabs=2Eorg/mailman/listinfo/linuxppc-embedded

Re: SCC1 as serial console

[Ladislav Klenovič]

exp

SCC1 as serial console

[Ladislav Klenovič]

Hi,
can anybody help me to setup the SCC1 port as serial console on MPC860 =
with kernel 2=2E6=2E15=2E4? I would like to use it as system console du=
ring the booting proccess=2E I can not get any output on serial console=
 during booting proccess, I use uboot=2E

thnx,
regards ladislav

Re: SCC1 as serial console

[Laurent Pinchart]

Hi Ladislav,

> can anybody help me to setup the SCC1 port as serial console on MPC860 with
> kernel 2.6.15.4? I would like to use it as system console during the
> booting proccess. I can not get any output on serial console during booting
> proccess, I use uboot.

Does SCC1 work correctly in U-Boot ? If not, you should fix that first. I'll 
assume it does.

There are many issues which could lead to a silent serial console. The serial 
port could be misconfigured, or the kernel could crash for another reason 
before the serial port is initialized.

Have you been able to get a serial console on another serial port (SMC) ? Are 
the clock frequencies computed by U-Boot and passed to the Linux kernel 
correct ?

Do you have a hardware debugger (BDI2000) that you can connect to the 
processor to see if Linux crashes before initializing the serial port ? If 
not, you will probably have to take a try at led-debugging (make some leds 
blink at various point in the Linux kernel to try to find out what happens), 
but that's really no fun.

Laurent Pinchart

Re: SCC1 as serial console

[Jeff Angielski]

On Mon, 2006-05-22 at 15:33 +0200, Ladislav Klenovič wrote:
> Hi,
> can anybody help me to setup the SCC1 port as serial console on MPC860 
> with kernel 2.6.15.4? I would like to use it as system console during 
> the booting proccess. I can not get any output on serial console during 
> booting proccess, I use uboot.

What are your kernel command line arguments?  Are you passing the right
ones in?

Have you configured the SCC correctly in the kernel?  Chosen SCC1? Baud
rates correct?  etc.  

Does your hardware need any special tweaks to the SCC code that is in
u-boot but not your kernel?


Jeff Angielski
The PTR Group