Hello Alan, Thank you for your response. >I still don't know what descriptor you're talking about. The qTD? The QH descriptor? Something else? The your answer is the qTD. >Maybe _it_ doesn't need to know the descriptor type -- but if I'm going to answer your question then _I_ need to know! :-) I understood. i want to know the reference of these sequence. Thank you Regards Takasugi ********************************************* Texas Instruments Japan Sales and Marketing Yokohama office Takasugi Hirokazu <takasugi@xxxxxx> TEL:03-4331-7124 FAX:045-453-9326 ********************************************* -----Original Message----- From: Alan Stern [mailto:stern@xxxxxxxxxxxxxxxxxxx] Sent: Saturday, September 17, 2011 2:06 AM To: Takasugi, Hirokazu Cc: linux-usb@xxxxxxxxxxxxxxx Subject: RE: DM3725 EHCI HOST controller descriptor update timing On Fri, 16 Sep 2011, Takasugi, Hirokazu wrote: > Hello Alan, > > Thank you for your answer. > I want to know the descriptor update timing from previous completion interrupt (Bulk-In). I still don't know what descriptor you're talking about. The qTD? The QH descriptor? Something else? > > > 1. The timing of update a Descriptor is after transfer Completion interrupt. Is my understanding correct? > > 2. Is there the status to confirm in descriptor before updating a Descriptor elsewhere? > > Does it need to know the descriptor type? Maybe _it_ doesn't need to know the descriptor type -- but if I'm going to answer your question then _I_ need to know! :-) Alan Stern -- 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
