Hello.
Felipe Balbi wrote:
On Wed, Dec 30, 2009 at 09:16:08AM +0530, Subbrathnam, Swaminathan
wrote:
We have been on this front months together now!!! Ideally the place
holder would be a place independant of platforms as this piece of code
is more of a platform independant library relating to TI CPPI DMA
operations. This would be used during initialization and confiuration
of CPPI4.x based peripherals. Though today USB is the only peripheral
that falls in that catagory ideally other like TI EMAC could fall in
the same space.
Having said that I also see that there seems to be no roadmap/plan for
any other peripheral other than USB to use CPPI4.x in the near future.
TI EMAC seems to continue use CPPI3.x.
This was the reason I had recommended earlier to locate this generic
CPPI 4.x functionality within MUSB. This definitely helps in having a
functional peripheral in the near (and most probably long) term.
I think it is prudent to locate this functionality in the musb
directory for now. In future if need arises we can relook at this
later (I am sure this in all probabilities would not be required).
In either way I would really appreiciate if we can come to a
conclusion at the earliest. Appreciate everybody's feedback and
direction.
You can do like omap and have the generic dma interface sitting in
mach-davinci,
We're currently having it there but the matter is it should be shred
between different platforms, so arch/arm/common/ seems like the right
place (which Russell didn't like, suggesting ill suited for that
drivers/dma/ instead).
then for musb, you'd have a series of wrappers to use the
cppi dma code.
We have the wrapper already, posted under this same subject.
WBR, Sergei
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