Hi Alan, Thanks for the reply. Currently I don't have setup with me. I will try to analyse the usbmon traces tomorrow. But I want to give some quick additional information which can be helpful for you to advice me in other ways. When I open /dev/video0 using cat, I am getting Broken Pipe error (for split transaction case) where as incase of OHCI it is giving data (Junk characters appear on the terminal). Thanks and Regards, Naveen ________________________________________ From: Alan Stern [stern@xxxxxxxxxxxxxxxxxxx] Sent: Tuesday, February 24, 2009 8:45 PM To: Naveen Mamindlapalli Cc: linux-usb@xxxxxxxxxxxxxxx Subject: Re: Split transaction support On Tue, 24 Feb 2009, Naveen@moschip wrote: > Hi All, > > Is there any support for split transactions ( ISOCH IN ) in linux kernel ?. Yes, of course there is. > I am using linux-2.6.27 and connected USB full speed camera (Logitech > QuickCam Pro 3000) under a high speed hub. The camera is detected by PWC > driver & when I tried to open the application (IP Telephony), it is not > capturing the video. Where as If I connect the device directly to ohci > roothub, the application is successfully capturing the video. You should use usbmon to collect a trace for each of the two cases: attached directly to OHCI and attached via a high-speed hub. Comparison of the two should indicate where the problem lies. Instructions for usbmon are in Documentation/usb/usbmon.txt. Alan Stern The information contained in this email and any attachments is confidential and may be subject to copyright or other intellectual property protection. If you are not the intended recipient, you are not authorized to use or disclose this information, and we request that you notify us by reply mail or telephone and delete the original message from your mail system. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
