From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 21205 invoked by alias); 18 Sep 2007 08:58:12 -0000 Received: (qmail 21197 invoked by uid 22791); 18 Sep 2007 08:58:11 -0000 X-Spam-Check-By: sourceware.org Received: from static124-190.staticcal.vsnl.net.in (HELO alumnux.com) (203.197.124.190) by sourceware.org (qpsmtpd/0.31) with ESMTP; Tue, 18 Sep 2007 08:58:02 +0000 Received: from [192.168.10.133] ([192.168.10.133]) by alumnux.com (8.12.11/8.12.11) with ESMTP id l8IES0Fw027581; Tue, 18 Sep 2007 14:28:00 GMT From: Imran Khan To: Andrew Lunn Cc: ecos-discuss@ecos.sourceware.org In-Reply-To: <20070918073959.GG2082@lunn.ch> References: <1190093267.2792.10.camel@imran.alumnus.co.in> <20070918073959.GG2082@lunn.ch> Content-Type: text/plain Date: Tue, 18 Sep 2007 08:58:00 -0000 Message-Id: <1190105875.2792.25.camel@imran.alumnus.co.in> Mime-Version: 1.0 X-Mailer: Evolution 2.8.0 (2.8.0-7.fc6) Content-Transfer-Encoding: 7bit Mailing-List: contact ecos-discuss-help@ecos.sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: ecos-discuss-owner@ecos.sourceware.org Subject: Re: [ECOS] How to enable RNDIS and CDC for USB X-SW-Source: 2007-09/txt/msg00106.txt.bz2 Hi Andrew, Thank you for your reply. I agree with you as far as GPL issue is concerned but at the moment we are not concerned about this issue. You are correct that host is getting wrong descriptors but such is the design of linux code. Here the compilation is done on the basis of some configuration flags specific to CDC or RNDIS so you can use your image with either CDC or RNDIS ,but in our code instead of having compile time flags we are setting some flags at run time and monitoring the enumeration process ,if enumeration is not complete within a specific time our device assumes that host is not right, then we set flags for other host and reinitialize the USB part.Our default flag setting is for RNDIS. Our problem is that once the host gets wrong descriptor it stops communication with the device so the new configuration is never used. Could you please tell me is there any other way of doing this ? Thanks & Regards, Imran On Tue, 2007-09-18 at 09:39 +0200, Andrew Lunn wrote: > On Tue, Sep 18, 2007 at 10:57:47AM +0530, Imran Khan wrote: > > Hi all, > > We have ported the RNDIS support code provided in linux-2.4.XX along > > with our platform specific USB code into the ecos. > > I hope you thought about the licensing issues here. I expect the USB > code is GPL. That makes your whole application now GPL. So you need to > give away all your sources, eCos, USB, and application, to your > customer. If you don't you are violating the GPL license. > > > But the design of the code is such that at any time it can support > > either RNDIS or CDC but not both at the same time. > > Could any one of you please tell us whether is there any possibility of > > checking the type of host at run time and doing the initialization > > again. > > > > We have tried with advertising two configurations to linux host,the > > first configuration being RNDIS but when the host gets a wrong > > descriptor it stops sending interrupts. > > Using two configurations sounds like the right way to do it. However > if the host is going wrong, maybe your descriptors are wrong. What > does usbview show? Does it look correct? Have you debugged the Linux > host code to work out why it goes wrong? > > Andrew > -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss