[coreboot] USB cannot work

Hilbert Tu(杜睿哲_Pegatron) Hilbert_Tu at pegatroncorp.com
Tue Aug 28 09:38:34 CEST 2018

Hi Nico,

Thanks. I guess you are right. I'll double check with other payload. Thanks again.


-----Original Message-----
From: Nico Huber [mailto:nico.h at gmx.de]
Sent: Saturday, August 25, 2018 12:38 AM
To: Hilbert Tu(杜睿哲_Pegatron)
Cc: coreboot at coreboot.org
Subject: Re: [coreboot] USB cannot work

Hi Hilbert,

On 8/24/18 4:22 AM, Hilbert Tu(杜睿哲_Pegatron) wrote:
> Do you know how to check USB2.0/USB3.0 in Grub2? I am trying to prove
> it.

not sure. GRUB has an `lsmod` command, if that lists something with ehci
or xhci, that might give a clue. Actually, I would just grep the source
code. In my current GRUB master checkout, `git grep -i xhci` returns

> But another question is then why EHCI driver cannot work when
> running with Coreboot on Denverton-NS platform? Is that due to only xHCI
> controller in Denverton-NS?

Yes, an EHCI driver can't work with an xHCI controller (and Denverton
has xHCI only, AUIU).

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