Re: Problem with full speed devices on PowerPC MPC5121 host port

2012-01-19 Thread Anatolij Gustschin
Hi Matthias, On Wed, 18 Jan 2012 14:42:20 +0100 Matthias Fuchs matthias.fu...@esd.eu wrote: ... Can you try the attached patch? Does it have an impact? Yes, in deed, it solved my problem :-) Finally I noticed that the problem is listed in the CPU's errata document. You could update the

Re: Problem with full speed devices on PowerPC MPC5121 host port

2012-01-18 Thread Anatolij Gustschin
Hi Matthias, On Tue, 17 Jan 2012 15:12:50 +0100 Matthias Fuchs matthias.fu...@esd.eu wrote: On 06.01.2012 19:03, Alan Stern wrote: On Fri, 6 Jan 2012, Matthias Fuchs wrote: For my eyes it does not really look like a general USB issue. It looks like a problem with the Freescale EHCI

Re: Problem with full speed devices on PowerPC MPC5121 host port

2012-01-18 Thread Matthias Fuchs
Hi Anatolij, On 18.01.2012 12:08, Anatolij Gustschin wrote: Hi Matthias, On Tue, 17 Jan 2012 15:12:50 +0100 Matthias Fuchs matthias.fu...@esd.eu wrote: On 06.01.2012 19:03, Alan Stern wrote: On Fri, 6 Jan 2012, Matthias Fuchs wrote: For my eyes it does not really look like a general

Re: Problem with full speed devices on PowerPC MPC5121 host port

2012-01-17 Thread Matthias Fuchs
On 06.01.2012 19:03, Alan Stern wrote: On Fri, 6 Jan 2012, Matthias Fuchs wrote: For my eyes it does not really look like a general USB issue. It looks like a problem with the Freescale EHCI implementation that is influenced by high interrupt or internal bus load caused by the flood ping.

Re: Problem with full speed devices on PowerPC MPC5121 host port

2012-01-06 Thread Matthias Fuchs
On 22.12.2011 18:39, Greg KH wrote: On Thu, Dec 22, 2011 at 12:48:45PM +0100, Matthias Fuchs wrote: Hi, I ran into trouble when using the MPC5121 with full speed USB devices. I've seen the issue with USB serial converters based on FTDI and Prolific chips. After connecting the device they

Re: Problem with full speed devices on PowerPC MPC5121 host port

2012-01-06 Thread Alan Stern
On Fri, 6 Jan 2012, Matthias Fuchs wrote: For my eyes it does not really look like a general USB issue. It looks like a problem with the Freescale EHCI implementation that is influenced by high interrupt or internal bus load caused by the flood ping. Indeed, it might be a problem with the