The problem get solved.The hardware has brain-damage behavior.
It must enable DMA swap.But code must use standard linux code.
Everything is ok.I can mount usb disk now after I remove nasty hack before.(That did by others,I was misled by it).So I think DMA swap just
swap the data used by devices,the data of TD & ED doesn't be swapped.
The doc is not accurate enough.
Thank you all for help.
Another question: where can I find the newest code of usb subsystem? bk? or CVS? I want to learn more about linux-usb of 2.6.X.
Regards yfw
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