From: Ruchika <ruchika.k@servergy.com>
To: linuxppc-dev@lists.ozlabs.org
Subject: Question about EHCI on P4080
Date: Wed, 19 Feb 2014 23:55:35 -0600 [thread overview]
Message-ID: <530598D7.5080602@servergy.com> (raw)
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 reply other threads:[~2014-02-20 5:55 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-20 5:55 Ruchika [this message]
2014-02-20 18:56 ` Question about EHCI on P4080 Ruchika
2014-02-21 21:08 ` Scott Wood
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