This controller is OHCI compatible but:
1. It is not PCI
2. It uses an 8Kb on-chip shared memory area rather than main memory for descriptors and buffers
We are basing our driver on an earlier driver for the SH7727 which is also not PCI but does use main memory for buffers, this driver was itself based on the standard OHCI driver (derived from kernel 2.4.18).
The problem is how to (easily) deal with the onchip memory. We will have to copy USB data between the main memory and the onchip buffer and there seem to be a lot of places where this is necessary.
Our other worry is the size of the shared memory area. Is only having 8Kb likely to cause problems?
Any advice would be appreciated.
Thanks
Julian Back
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