From owner-freebsd-usb@freebsd.org Wed May 18 15:53:23 2016 Return-Path: Delivered-To: freebsd-usb@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id EBC92B412F5 for ; Wed, 18 May 2016 15:53:23 +0000 (UTC) (envelope-from karl@denninger.net) Received: from mail.denninger.net (wsip-70-169-168-7.pn.at.cox.net [70.169.168.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 99EAA1365 for ; Wed, 18 May 2016 15:53:23 +0000 (UTC) (envelope-from karl@denninger.net) Received: from [192.168.1.40] (Karl-Desktop.Denninger.net [192.168.1.40]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.denninger.net (Postfix) with ESMTPSA id B31961183BA for ; Wed, 18 May 2016 10:53:21 -0500 (CDT) Subject: Re: Oddity with ugen To: freebsd-usb@freebsd.org References: <46bd6efe-5335-f659-0b07-5107b0e9a326@selasky.org> From: Karl Denninger Message-ID: <8dfad53f-e8a6-68b7-37e2-d5cd95768ceb@denninger.net> Date: Wed, 18 May 2016 10:53:11 -0500 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.1.0 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-512; boundary="------------ms070408020103050700090308" X-Content-Filtered-By: Mailman/MimeDel 2.1.22 X-BeenThere: freebsd-usb@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: FreeBSD support for USB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 18 May 2016 15:53:24 -0000 This is a cryptographically signed message in MIME format. --------------ms070408020103050700090308 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 5/18/2016 10:46, Hans Petter Selasky wrote: > On 05/18/16 17:32, Karl Denninger wrote: >> If I'm reading this correctly usbdump is showing me exactly what the >> device is sending; that is, there is no "driver" involved here (just b= us >> traffic) -- correct? > Hi, > > usbdump is showing exactly what the USB controller driver is sending > and receiving. It is similar to a USB wire trace. > Basically tcpdump for usb. Got it. >> >> If so that looks like a device bug (and a nasty one that I may have al= l >> sorts of fun trying to work around.) > > Yes, most likely a bug on the device side. > > I assume you are running this software on a regular computer with > EHCI/XHCI/OHCI/UHCI ? > > --HPS This is being seen on a Pi2 / 11-Current. I'm reasonably sure that the Pi2 itself and the base USB code is ok, however, because there is another USB device also in use by the same software (it emulates a serial port and so attaches on the serial driver; it exposes itself as a /dev/cua.... device) which has never exhibited repeated frames although it too talks using interrupt mode, and also has a packet style of communication, so if it was doing the same sort of thing my code would have been yelling about it, particularly since that other device also generates sequence numbers on the packets for use by the software in implementing a callback stack (this one doesn't.) --=20 Karl Denninger karl@denninger.net /The Market Ticker/ /[S/MIME encrypted email preferred]/ --------------ms070408020103050700090308 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature 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