Hi,
I'm trying to use USB host controller in an MPC8272. My board is based
on ADS8272 with few modifications: FLASH and SDRAM models are different
and several GPIOs and interrupts are not connected the same way.
The driver we are using is CPM2USB from sourceforge with a 2.6.21.5
kernel version.
With my ADS8272 board it works quite fine, but with our board, the
processor hangs when it starts sending data to the device.
This issue seems to be related to one problem that we have always had.
We can't configure buffers of SMCs, SCCs, etc, to be in SDRAM, because
the processor hangs. We always have to configure buffers in DPRAM. In
other drivers this has not been a problem, because the buffer size is
not very large, so we can allocate it in DPRAM, but for this one, the
buffer size is 0x8000 (32Kb) which exceeds DPRAM size.
Has anybody had the same problem? Can it be an USB specific problem or a
general one?
Thanks,
David
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