From: Ruchika <ruchika.k@servergy.com>
To: linuxppc-dev@lists.ozlabs.org
Subject: Re: Question about EHCI on P4080
Date: Thu, 20 Feb 2014 12:56:09 -0600 [thread overview]
Message-ID: <53064FC9.8070908@servergy.com> (raw)
In-Reply-To: <530598D7.5080602@servergy.com>
linuxppc,
Is there another mailing list which is more appropriate ?
If so I'd be happy to get a recommendation.
Thank you
Regards
ruchika
On 2/19/2014 11:55 PM, Ruchika wrote:
> Hi,
> I've been trying to understand why the uboot code is unable to work with
> USB1.1 devices.
> On a USB analyzer:
> I notice on an analyzer that there are no SOF or IN tokens seen on the
> bus at all. The only after the very first setup packet is sent and ACK'd.
>
> The board has a hub chip on it connected to the USB controller via a
> Ulpi interface.
>
> Uboot debug indicates that the transfer times out and was still "Active"
>
> The kernel code indicates that a companion driver handles 1.1 devices.
> Does this mean there are 2 HCD's, one for HS and one for FS/LS in the
> kernel ?
> Thank you
>
>
> ruchika
next prev parent reply other threads:[~2014-02-20 18:56 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-20 5:55 Question about EHCI on P4080 Ruchika
2014-02-20 18:56 ` Ruchika [this message]
2014-02-21 21:08 ` Scott Wood
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