2.4.18: CPM1 stops when initializing ATM/UTOPIA.

2.4.18: CPM1 stops when initializing ATM/UTOPIA.

[Theo Gjaltema]

Hi,

Last week I was trying to integrate the atm/utopia driver (sourceforce) 
into a 2.4.18 kernel build for a 862, but mij attemtps failed. It 
appeared that wen on the first location of the SCC4 (now used for 
utopia) a buffer address is written, most CPM activities are halted, 
including the SCM1 which I used as console port. The console driver did 
write in the allocated buffer descriptors, but the tranmission of the 
data was never acknowledged, thus hanging the kernel.

Anyone an idea what happened?

Theo.

Re: 2.4.18: CPM1 stops when initializing ATM/UTOPIA.

[Alex Zeffertt]

It may be that you're getting a conflict in SCC usage.  Make sure you
have CONFIG_SERIAL_ATM undefined.  But if you really need it make sure
CONFIG_SERIAL_ATM_SCC is not used by anything else.  You may also want
to disable CONFIG_PTP_SWITCHING if you don't need it.  Finally you
probably want CONFIG_PHY_OTHER instead of CONFIG_PHY_SUNI_155 or
CONFIG_PHY_ATM_25.  These latter options make assumptions about the
memory mapping of your phy.

Note: a long while ago we had problems with PTP switching causing hangs
but this was fixed by a ucode patch from motorola.  If you really need
PTP switching you should get this.

Alex


On Fri, 06 May 2005 20:41:53 +0200
Theo Gjaltema <gjalt007@chello.nl> wrote:

> Hi,
> 
> Last week I was trying to integrate the atm/utopia driver
> (sourceforce) into a 2.4.18 kernel build for a 862, but mij attemtps
> failed. It appeared that wen on the first location of the SCC4 (now
> used for utopia) a buffer address is written, most CPM activities are
> halted, including the SCM1 which I used as console port. The console
> driver did write in the allocated buffer descriptors, but the
> tranmission of the data was never acknowledged, thus hanging the
> kernel.
> 
> Anyone an idea what happened?
> 
> Theo.
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