On Fri, 2003-07-11 at 07:40, David Brownell wrote:
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.
The "ohci-hcd" driver has been backported to 2.4, and it needs "non-pci" support (I didn't update its SA1111 support). Given that, the 2.5 updates could be done before other bits of 2.5/MIPS are ready!
I'd sort of like to see the dependency on PCI go even further away, but that's not necessarily quick. Host-side USB should depend first on having a host controller driver, and that shouldn't need to depend on PCI when CONFIG_SOC_AU1X00 is set. But it's not cleanly factored in usbcore yet.
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.
I'd like to see it done for "ohci-hcd", and be sure that the 2.5 stack has the same capabilities. (Ideally, first; this is a version of the "new drivers on 2.5 first" rule Greg's been applying.)
As for the 2.4 version, I'd mostly like to key off the AU1X00 config variable to eliminate the need to tweak anything in kernel config -- assuming that's possible, as I seem to recall it should be.
- Dave
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