AM335X USB0 connect USB HUB Test Signal

xin Ryan

Other Parts Discussed in Thread: AM3352

Dear all,
My Platform is AM3352, SDK is SDK6.0
USB0 controler connect USB HUB(FE2.1)
Now, Signal test, test use the command refer to the TI WIKI(USB Module)
http://processors.wiki.ti.com/index.php/UsbgeneralpageLinux-v3p1#musb_driver_TEST-MODE_debugfs_support
But, before the HUB have a signal, after the HUB have no signal?
I think that the roo hub(USB0) can't forward the pack to FE2.1(Sub HUB)?
Maybe modify USB driver, but I want to give some advice, Thank you!

over 10 years ago

0 Biser Gatchev-XID over 10 years ago

TI__Guru**** 393215 points

There are no driver modifications needed. You have to reset the board after each test mode command is used.

0 xin Ryan over 10 years ago in reply to Biser Gatchev-XID

Expert 1140 points

if the USB0 can't connect USB, use the command, the signal is very OK
Now, connect the HUB, use the same the command, test the HUB, have no signal.
The diver maybe modify, so the root hub(USB0) can't forward the test package to the sub HUB(FE2.1)

0 -DK- over 10 years ago in reply to xin Ryan

TI__Mastermind 27890 points

Hubs do not forward compliance packets from the host. Hubs have their own (different) test specification and procedures which can be found here:

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AM335X USB0 connect USB HUB Test Signal