[U-Boot] bdi3000 configurtio file for mpc8308RDB

David Hawkins dwh at ovro.caltech.edu
Thu Jul 26 22:01:40 CEST 2012


Hi Wolfgang,

>> In your opinion, is MPC8308 USB Device Mode completely broken?
>
> Define completely...

:)

> When acting as a mass storage device, we saw some ~14 MB/s throughput
> to the device when the bug did not trigger;  when it did, we got 1.8
> MB/s and less, and many device reset messages in the system logs.

Ok, that sounds annoying enough that I won't bother to support
the MPC8308 device mode down the backplane.

>> How about USB Host mode? The board will communicate with a rear
>> transition module (another board plugged in from the rear side
>> of the chassis). If MPC8308 USB Host Mode is reliable, then I can
>> wire the USB interface through the backplane for use on the
>> RTM, eg., for talking to an FT245/232 device or a USB microcontroller.
>
> Host mode works fine.

Great! I'll put a USB3300 PHY on the board, and run the
USB over to the RTM.

Thanks for sharing your experiences, its much appreciated.

Cheers,
Dave



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