cs,
Sorry, I forgot there is another question.
About the performance, Lee have did speed benchmark, Please refer this link:
http://www.mail-archive.com/[email protected]/msg05522.html
As far as I know, USB host mode with DMA support doesn't work at git tree
(2.6.23 - 2.6.25).
And PIO mode works fine.
TI is working on this issue. I guess some patches of USB DMA support will be
released soon.
I'm looking forward it. :)
good luck
( from your email address, i guess you're from china? I'm from china too.
so nice to meet u :)
/Frank
>I have two question for davinci Dm6446 to use usb disk .
>
>I plug my udisk to Dm6446 EVM, but I get an message " usb 1->1: new high speed
>USB device using musb_hdrc and address XXX". But I didn't see /dev/sda?? , so
>I wander how to use udisk under linux. Can any one tell me.
can you tell us which kernel version did you use?
I think you should have a look at this thread:
http://www.mail-archive.com/[email protected]/msg05480.html
try it:
modprobe scsi_mod
modprobe sd_mod
modprobe musb_hdrc
modprobe usb_storage
mount -t vfat /dev/sda1 /mnt
>Another question, the if driver use USB 2.0 full speed mode ( 480M bps ) ,
>what is the average speed when transfer data , I also expect it can attain 54M
>byte per sec at least
/Frank
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