(one or two seconds
ought to be enough). See the instructions in the kernel source file
Documentation/usb/usbmon.txt.
Thanks for your support,
Michael Tessier
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More
it with the current
kernel used (V2.6.31). What are the better tools to get into that? I guess a
USB analyzer (hardware) would be the smart thing? Any brand name to suggest?
Any other ideas for a solution will be really appreciated.
Regards,
Michael Tessier.
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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
work...
-2 host controller, boot it from a Live-CD version of Linux, plug in your
hub with the codecs, and see what happens.
Good point. I'll try that for sure. This will at least let me know if this
issue has been corrected in the latest kernel.
Michael Tessier
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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 of work it would require. Thanks for the idea, I'll let you know.
Michael Tessier
N�r��yb�X��ǧv�^�){.n
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 host controller)
Linux kernel: 2.6.31, using EHCI USB driver
As mentioned
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)
Note: each
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
5Linux version 2.6.31-770-g0e46b52-0897
(michael.tess...@vsvr-compile-01.pocatec.com) (gcc version 4.1.2) #12 PREEMPT
Mon Nov 24 18:34:19 EST 2014
