From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oa0-f44.google.com (mail-oa0-f44.google.com [209.85.219.44]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id AE87C2C00C0 for ; Thu, 20 Feb 2014 16:55:40 +1100 (EST) Received: by mail-oa0-f44.google.com with SMTP id g12so1659695oah.3 for ; Wed, 19 Feb 2014 21:55:37 -0800 (PST) Received: from [10.0.0.12] (pool-71-244-62-208.dllstx.fios.verizon.net. [71.244.62.208]) by mx.google.com with ESMTPSA id lg8sm8445676obc.14.2014.02.19.21.55.36 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 19 Feb 2014 21:55:36 -0800 (PST) Message-ID: <530598D7.5080602@servergy.com> Date: Wed, 19 Feb 2014 23:55:35 -0600 From: Ruchika MIME-Version: 1.0 To: linuxppc-dev@lists.ozlabs.org Subject: Question about EHCI on P4080 Content-Type: text/plain; charset=ISO-8859-1; format=flowed List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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