Subject: Re: MPC8360E USB Host Controller Driver

From: Alex Zeffertt <[email-masked]>
Date: Thu, 07 Sep 2006 15:17:07 +0100

Li Yang-r58472 wrote:
>> i have a MPC8347E running with the Freescale E(F)HCI driver 
>> and Kernel 2.6.17 (Freescale LTIB).
>>
>> Because of this mail, i checked, if there are any periodical 
>> interrupts, without real USB payload.
>>
>> The result is: NO
>>
>> If i attach a USB-mouse, i get 5 interrupts.
>> If i remove it again, 1 additional.
>>
>> Nothing else, silence !
>>
>> USB works well with USB 1.1 and 2.0 devices (This was not the 
>> case with earlier Kernels, e.g. 2.6.13, because for the 
>> switching between 1.1 and 2.0 you need a transaction 
>> translator driver).
> 
> MPC834x USB is very different from the USB of CPM/QE.  It is an
> integrated EHCI controller.
> 

So, the question is still open, does the QuiccEngine HCI (a.k.a. FHCI)
generate loading on the PPC core when there is no traffic on the USB?

Alex