Re: EHCI driver

[Aleš Nesrsta]

Hi,

I tried GRUB EHCI driver inside VirtualBox (v. 4.1.18) - and it works.

So, why GRUB EHCI doesn't work in VMware ? I don't know.
I have only some probably stupid idea - maybe VMware virtualization has
built-in some optimization which prevents correct operation of EHCI in
poll mode (without interrupt)...

BR,
Ales


Aleš Nesrsta wrote:
> Hi,
> 
> I reproduced this problem on VMware workstation (v. 7.1.5).
> 
> But I am totally confused - it looks like EHCI doesn't execute
> Asynchronous List (AL) even it is active according to EHCI status.
> I tried to do some experiments but QHs in AL remained "untouched" by
> EHCI - EHCI ignored any settings/changes I made in QHs in AL.
> EHCI status reported in status register said all is OK - no error, EHCI
> is in Run state and AL is active...
> 
> I don't understand, I have no idea, sorry :-(
> 
> I will try to test EHCI in VirtualBox later if there will be the same
> situation.
> 
> BR,
> Ales
> 
> yanxiang fang wrote:
> > The ehci driver cannot work for vmware ehci host controller.
> > It can detect usb device, but failed to get device descriptor.
> > Anyone get the same thing?
> >  
> > Frank
> > _______________________________________________
> > Grub-devel mailing list
> > address@hidden
> > https://lists.gnu.org/mailman/listinfo/grub-devel
> 
> 
> 
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