MPC8260 SCC2 UART hang

MPC8260 SCC2 UART hang

[Jeff Angielski]

I am having a problem with the SCC2 uart whereby the system hangs
whenever I try to use that device.  It happens using both the Denx
kernel and the kernel.org 2.4.27 kernel.

I was hoping that somebody can tell me if SCC2 works as expected on
their MPC8260 hardware so that I can reduce the scope of my debug
effort.

Here is the relevant info from the 2.4.27 kenel:

<snip>
CPM UART driver version 0.01
ttyS0 on SMC1 at 0x0000, BRG1
ttyS1 on SMC2 at 0x0040, BRG2
ttyS2 on SCC1 at 0x8000, BRG3
ttyS3 on SCC2 at 0x8100, BRG4
<snip>

Here is the simple test that causes the problem.  Once I try to access
/dev/tts/3 the system hangs.

bash-2.05b# echo "something" > /dev/tts/0
something
bash-2.05b# echo "something" > /dev/tts/1
bash-2.05b# echo "something" > /dev/tts/2
bash-2.05b# echo "something" > /dev/tts/3
[system is dead, no console, cannot ping, no nothing...]

FWIW, my hardware is the Embedded Planet EP8260 H2 1.3.

Jeff Angielski
The PTR Group

Re: MPC8260 SCC2 UART hang

[Wolfgang Denk]

In message <1096034125.8121.15.camel@nighteyes.localdomain> you wrote:
> 
> I am having a problem with the SCC2 uart whereby the system hangs
> whenever I try to use that device.  It happens using both the Denx
> kernel and the kernel.org 2.4.27 kernel.
> 
> I was hoping that somebody can tell me if SCC2 works as expected on
> their MPC8260 hardware so that I can reduce the scope of my debug
> effort.

Our kernel tree has been tested and works fine  for  example  on  the
PM826 board.

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
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