Date: Tue, 15 Oct 2013 13:20:01 GMT From: SAITOU Toshihide <toshi@ruby.ocn.ne.jp> To: freebsd-usb@FreeBSD.org Subject: Re: usb/181987: USB isochronous transfer of the USB driver (Mentor Graphics OTG: musb_otg) is not working. Message-ID: <201310151320.r9FDK197030541@freefall.freebsd.org>
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The following reply was made to PR usb/181987; it has been noted by GNATS.
From: SAITOU Toshihide <toshi@ruby.ocn.ne.jp>
To: freebsd-gnats-submit@FreeBSD.org
Cc:
Subject: Re: usb/181987: USB isochronous transfer of the USB driver (Mentor
Graphics OTG: musb_otg) is not working.
Date: Tue, 15 Oct 2013 22:17:17 +0900 (JST)
In message: <525CE936.70800@bitfrost.no>
Hans Petter Selasky <hps@bitfrost.no> writes:
> On 09/10/13 13:01, SAITOU Toshihide wrote:
>>
>>> Number: 181987
>>> Category: usb
>>> Synopsis: USB isochronous transfer of the USB driver (Mentor
>>> Graphics OTG: musb_otg) is not working.
>>> Confidential: no
>>> Severity: non-critical
>>> Priority: low
>>> Responsible: freebsd-usb
>>> State: open
>>> Quarter:
>>> Keywords:
>>> Date-Required:
>>> Class: sw-bug
>>> Submitter-Id: current-users
>>> Arrival-Date: Tue Sep 10 11:10:00 UTC 2013
>>> Closed-Date:
>>> Last-Modified:
>>> Originator: SAITOU Toshihide
>>> Release: FreeBSD 10.0-CURRENT
>>> Organization:
>>> Environment:
>> FreeBSD bbb 10.0-CURRENT FreeBSD 10.0-CURRENT #1: Mon Sep 9
>> 23:34:15 JST 2013
>> toshi@fbsd:/usr/obj/arm.armv6/usr/src/sys/BEAGLEBONE arm
>>
>>> Description:
>> The patch attached is somewhat fixed the problem for the
>> LOGICOOL C920 but still most UVC devices are not working.
>>
>> My guess is that the not working device requires three
>> transactions per *microframe* for the data transfer rate as
>> the video streaming but the current driver performs one
>> transaction per microframe. The following page imply the
>> existence of the undocumented setting to perform so.
>> http://e2e.ti.com/support/embedded/wince/f/353/t/68966.aspx
>>
>>> How-To-Repeat:
>>
>>> Fix:
>>
>>
>>> Release-Note:
>>> Audit-Trail:
>>> Unformatted:
>> _______________________________________________
>> freebsd-usb@freebsd.org mailing list
>> http://lists.freebsd.org/mailman/listinfo/freebsd-usb
>> To unsubscribe, send any mail to
>> "freebsd-usb-unsubscribe@freebsd.org"
>>
>
> Hi,
>
> Can you please test the attached patch and report back?
>
> --HPS
I tried to use a UVC device using libusb but couldn't get
the data. The latter patch was the same result.
FreeBSD revision is 255933.
When libusb_submit_transfer's call back is called,
actual_length of libusb_iso_packet_descriptor is 0 or 12.
A snippet of ``sysctl hw.usb.debug=4'' is below:
musbotg_device_isoc_enter: start next=537
musbotg_ep_int_set: ep_no=1, on=1
musbotg_host_data_rx: ep_no=1
musbotg_host_data_rx: csr=0x01
musbotg_host_data_rx: csrh=0x00
musbotg_interrupt: real endpoint interrupt rx=0x0002, tx=0x0000
musbotg_host_data_rx: ep_no=1
musbotg_host_data_rx: csr=0x01
musbotg_host_data_rx: count=0x0a80
musbotg_channel_free: ep_no=1
musbotg_ep_int_set: ep_no=1, on=0
musbotg_device_done: xfer=0xc2c080c0, endpoint=0xc2ac3cb8, error=22
It seems that more data are collected...
Thanks,
--
SAITOU Toshihide
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