RE: MPC8541E DMA transfer

Is there any support in Linux 2.6.X for using this controller, if so,
are you aware of any test driver I can take a look at?

Thanks,
Bizhan

Many thanks in =20

-----Original Message-----
From: Kumar Gala [mailto:kumar.gala@freescale.com]=20
Sent: Wednesday, August 03, 2005 11:24 AM
To: Bizhan Gholikhamseh (bgholikh)
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: MPC8541E DMA transfer

I dont see any reason you couldn't use the internal DMA engine on the
MPC8541E to do what you need.  You will just need to schedule the work
every 10ms.

- kumar

On Aug 3, 2005, at 10:04 AM, Bizhan Gholikhamseh \(((bgholikh\))) wrote:

Hi all,
I am developing a linux driver (2.6.10) for Freescale MPC8541E=20
(customized board) to read and write 8 buffers (each buffer is 960=20
bytes
long) every 10 ms to/from a custom made PCI card with on board DSP=20
Chip.
The chip's internal and external memories are memory mapped to the CPU

address space.
For reason that is beyond the discussion here, the DMA request line on

the PCI card is not connected although the PCI card has DMA=20
capabilities.
So what are my options?
Could I still do DMA transfer from the Host to the device?

Many thanks in advance,
Bizhan

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