running 8xx without UART

running 8xx without UART

[Stephan Linke]

Hi,

is it possible to make a 8xx kernel without setting up one of the serial interfaces for UART mode? It seames to me like it is only
possible to choose between the CPM interfaces.
We are experiencing problems with SCC3 running ethernet and SMC1 as console interface on a 852.

Thanx, Stephan


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Re: running 8xx without UART

[Wolfgang Denk]

In message <FCEAKDJJAPHPLJFINDAJAEHGDCAA.Stephan.Linke@epygi.de> you wrote:
>
> is it possible to make a 8xx kernel without setting up one of the serial interfaces for UART mode? It seames to me like it is only

Yes, this is possible.

> possible to choose between the CPM interfaces.
> We are experiencing problems with SCC3 running ethernet and SMC1 as console interface on a 852.

I think it would be better to solve this problem instead of just  not
using SMC1 and leaving an unresolved bug in the kernel...


Best regards,

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
Immortality consists largely of boredom.
	-- Zefrem Cochrane, "Metamorphosis", stardate 3219.8

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Re: running 8xx without UART

[Pantelis Antoniou]

Wolfgang Denk wrote:

>In message <FCEAKDJJAPHPLJFINDAJAEHGDCAA.Stephan.Linke@epygi.de> you wrote:
>
>
>>is it possible to make a 8xx kernel without setting up one of the serial interfaces for UART mode? It seames to me like it is only
>>
>>
>
>Yes, this is possible.
>
>
>
>>possible to choose between the CPM interfaces.
>>We are experiencing problems with SCC3 running ethernet and SMC1 as console interface on a 852.
>>
>>
>
>I think it would be better to solve this problem instead of just  not
>using SMC1 and leaving an unresolved bug in the kernel...
>
>
>Best regards,
>
>Wolfgang Denk
>
>--
>Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
>Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
>Immortality consists largely of boredom.
>	-- Zefrem Cochrane, "Metamorphosis", stardate 3219.8
>
>
>
>
>
I just pop up here to say that I have done this for a previous board
with a 850
and instead we used a netconsole.

In a new board we have the same problem, and I'll have to make the patch
again. Since we need a serial port we used a max3100 spi to serial converter
and I have a driver for that ready (but not yet as a console).

When I get around to add support for this chip in u-boot I'll also send the
patches for the kernel.

Regards

Pantelis


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Re: running 8xx without UART

[Wolfgang Denk]

In message <3EE853AA.9020106@intracom.gr> you wrote:
>
> In a new board we have the same problem, and I'll have to make the patch
> again. Since we need a serial port we used a max3100 spi to serial converter
> and I have a driver for that ready (but not yet as a console).

See drivers/char/max3111_serial.[ch] in our kernel tree :-)

> When I get around to add support for this chip in u-boot I'll also send the
> patches for the kernel.

TIA!

Best regards,

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
The C-shell doesn't parse. It adhoculates.
    - Casper.Dik@Holland.Sun.COM in <3ol96k$b2j@engnews2.Eng.Sun.COM>

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RE: running 8xx without UART

[Stephan Linke]

Hi,

there appeares to be a microcode patch for MPC862 that allowes relocating SMC, SPI and I2C Parameter RAM. This should help getting
SMC1 running while SCC3 is doing Ethernet.

Thanks, Stephan

> -----Original Message-----
> From: owner-linuxppc-embedded@lists.linuxppc.org
> [mailto:owner-linuxppc-embedded@lists.linuxppc.org]On Behalf Of Stephan
> Linke
> Sent: Donnerstag, 12. Juni 2003 13:43
> To: wd@denx.de
> Cc: Linuxppc-Embedded
> Subject: RE: running 8xx without UART
>
>
>
> Hi,
>
> > -----Original Message-----
> > From: wd@denx.de [mailto:wd@denx.de]
> > Sent: Donnerstag, 12. Juni 2003 13:22
> > To: Stephan Linke
> > Subject: Re: running 8xx without UART
> >
> >
> > In message <FCEAKDJJAPHPLJFINDAJMEHJDCAA.Stephan.Linke@epygi.de> you wrote:
> > > Sorry, I accidentialy replied to the wrong mail...
> >
> > Kein Problem :-)
> >
> > > this problem is actualy no kernel bug. It is a limitation of the 862 family that you can't use SMC1 while you use
> SCC3 as ATM or
> > > ethernet. It's not so well documented. Thant's why we run into that trap. The special problem on 852 is that there are
> > ony 2 SCC's
> > > and 1 SMC. :-)
> > ...
> > > > > We are experiencing problems with SCC3 running ethernet and SMC1 as console interface on a 852.
> >
> > SCC3 = Ethernet or SCC3 = ATM?
> >
> >
> We are using SCC3 as ethernet (Actualy there is no ATM on MPC852. But I guess that doesn't make a difference). :-)
>
> Stephan
>
>
>
>


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