Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756788Ab0HNB17 (ORCPT ); Fri, 13 Aug 2010 21:27:59 -0400 Received: from mail-qy0-f174.google.com ([209.85.216.174]:42151 "EHLO mail-qy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754277Ab0HNB16 (ORCPT ); Fri, 13 Aug 2010 21:27:58 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=ejcn1ITQxC6NASSAVSmdeeBnPSavMh3iA9uV1x/Gv3XKJapZTEmCZZSE2BSjSHWaFS Q3g/fS8qh2ut7wdhbWULEILWxqWYSw3L7tQmrVcmjItC7DTZxNc4cxhfPcV83/6Bug4L nar55gvx9rXg98I30ht4br4BfAn6owMQ6S8aU= MIME-Version: 1.0 In-Reply-To: <87sk2i45es.fsf@erwin.mina86.com> References: <1281691874-8154-1-git-send-email-dries.vanpuymbroeck@dekimo.com> <87sk2i45es.fsf@erwin.mina86.com> Date: Sat, 14 Aug 2010 09:27:57 +0800 Message-ID: Subject: Re: [PATCH] USB: Gadget: g_multi: added INF file for gadget with multiple configurations From: Xiaofan Chen To: Michal Nazarewicz Cc: Dries Van Puymbroeck , linux-usb@vger.kernel.org, Greg KH , =?ISO-8859-2?Q?Micha=B3_Nazarewicz?= , Dries Van Puymbroeck , linux-kernel@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2093 Lines: 49 On Sat, Aug 14, 2010 at 4:35 AM, Michal Nazarewicz wrote: > Xiaofan Chen writes: > >> On Fri, Aug 13, 2010 at 5:31 PM, Dries Van Puymbroeck >> wrote: >>> When a mutlifunction gadget has more than 1 configuration, Windows does not >>> use its generic driver for multifunctional USB devices. >> >> Sorry but what do you mean by the above? >> As per the previous discussions, it seems that a registry entry hack >> (for Vista and Windows 7) is needed. >> http://msdn.microsoft.com/en-us/library/ff538059%28VS.85%29.aspx >> >>> This commit adds an INF file that will load the required Windows driver >>> as well as a short description in gadget_multi.txt >> >> It seems to me your inf file forces the USB Generic >> Parent Driver (for USB Composite Device) to load. But for which >> configuration? I do not have any device to test myself. But >> I tend to guess it will still be the first configuration (either >> RNDIS or CDC ECM). > > 2-configuration g_multi has configuration with RNDIS as the first one so > that's pretty perfect for us. I guess so. But I am wondering if the inf file really needed or not in this case. Basically I am just wondering if the following statement is true or not. >>> When a mutlifunction gadget has more than 1 configuration, Windows does not >>> use its generic driver for multifunction USB devices. I am thinking the inf file is not necessary. "When the system detects that a USB device is composite, it loads the USB common class generic parent driver (usbccgp.sys)." http://msdn.microsoft.com/en-us/library/ff538059%28VS.85%29.aspx And since 1st configuration RNDIS is what desired, nothing needs to be done. Obviously you have the device to test, I would be interested to know your test results under XP, Vista and Win7. -- Xiaofan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/