MPC5200 : dma and IDE

Wolfgang Denk wd at
Wed Mar 17 01:04:56 EST 2004

Dear Gael,

in message <006301c40b57$26dc7960$ad1010ac at pc173> you wrote:
> I am using linux on a MPC5200 Lite board. When I activate the DMA on IDE bus
> and try to access to the disk, I have a kernel panic. I have seen in the
> m5xxx.c that DMA is disabled until it will work.

Indeed this is a known problem which cannot be fixed with the current
version of the BestComm microcode.

> Does anybody has a patch for this or should it be done ? If anyone already
> has work on this problem, is it possible to share informations to fix it ?

You will have to wait for the next version of the BestComm code.

Best regards,

Wolfgang Denk

Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at
I'd rather be led to hell than managed to heaven.

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