products)
When you say "straightforward", again do you have an idea of the amount of time
to do such work?
> > Any other ideas for a solution will be really appreciated.
>
> You should begin by using usbmon during a short test (one or two seconds
> ought to be enough). S
ution, which corresponds to replace
current units ($), so that is not really an option for us;
So as a last resort, I'm wondering, where is the USB expert who could help us
solving our problem? Any suggestions?
If we are to get into debugging the USB driver, we would do it with the curre
> > > > That is interresting, however, I have an older kernel running an
> > > > OHCI driver which is able to handle 4 codecs. Same usb hardware
> > > > (codecs and hub), but older kernel on a different CPU, with much
> > > > less power. This makes me believe that there's a solution to make it
hey bought us a "Form Fit & Function"
plattform. We have a huge bunch of documentation coming with each deliverable
(part of an ISO process, following IEEE software standards). So for the
company, migrating to the latest kernel is the last resort because of the
amount
o fix it has not yet been merged.
> >
> > I understand. However, if one could test the following with a 3.x kernel:
> > - CPU with USB 2.0 Host controller (using EHCI-hcd driver)
> > - 4-port USB 1.1 Hub
> > - 4x USB codecs (configured at 32khz-mono, 16-bits audio)
>
> On Mon, 15 Dec 2014, Michael Tessier wrote:
>
> > Hi,
> >
> > I am dealing with a USB EHCI driver bug. Here is the info:
> >
> > My configuration:
> > -
> >
> > Host: Freescale i.MX512 with ARM Cortex A8 (USB 2.0 h
>>
>> My configuration:
>> -
>>
>> Host: Freescale i.MX512 with ARM Cortex A8 (USB 2.0 host controller)
>> Linux
>> kernel: 2.6.31, using EHCI USB driver
>> Hub: 4-PORT USB 1.1 HUB (Texas Instruments PN: tusb2046b)
>> Devices: 4 USB 1.1 audio codecs (Texas Instruments PN: pcm2901
if I'm not at the
right place to ask these questions. I can also provide some code if
someone need it to help.
Attached is a dump of my "dmesg" after startup.
Michael Tessier
<5>Linux version 2.6.31-770-g0e46b52-0897
(michael.tess...@vsvr-compile-01.pocatec.com) (gcc
