On Fri, 2003-07-11 at 07:40, David Brownell wrote:
> Pete Popov wrote:
> > RFC on the following ohci non-pci patch, against 2.4.. The patch has
> > been tested on MIPS only, but it's pretty generic and should work with
> > others arches as long as the right command line parameters are passed.
> 
> At a first glance it didn't look problematic, though
> I wonder if having config options (instead of module
> options) might not be a better approach, at least to
> define defaults.
> 
> Though I do wonder what the 2.5 version of that patch
> would look like, and how this plays with the SA-1111
> support (which is also non-PCI).  The 2.5 kernel has
> the SA-1111 support "native", while in 2.4 it's in
> separate patches (like 2.4.19-rmk7).

I haven't looked at the 2.5 SA usb support, but my gut feel is that we
can do something similar to generalize the non-pci ohci support. I know
that internally we used a similar approach for the 2.4 tree, so I'm
guessing the SA and MIPS support is very similar, with some low-level
hardware initialization differences.  There's other issues with 2.5 MIPS
so I haven't gotten as far as USB yet.

> Also, which OHCI did you test with?  I understand that
> the non-PCI implementations are a bit more variable in
> quality-of-implementation, so that it might be useful
> to at least document "worked with these parts".

AMD/Alchemy's Au1x SOCs which all have the same ohci controller.

If you would like to see the patch reworked in a certain way before you
can accept it, let me know and I'll try to allocate time to it. I've had
the patch in my directory on linux-mips.org for a while and I keep
having to update it with different kernel releases, so it would be nice
if we can merge-in the code at some point.

Pete



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