Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752497Ab0DZOmG (ORCPT ); Mon, 26 Apr 2010 10:42:06 -0400 Received: from mailout1.w1.samsung.com ([210.118.77.11]:8575 "EHLO mailout1.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751853Ab0DZOmE convert rfc822-to-8bit (ORCPT ); Mon, 26 Apr 2010 10:42:04 -0400 Date: Mon, 26 Apr 2010 16:42:17 +0200 From: =?utf-8?B?TWljaGHFgiBOYXphcmV3aWN6?= Subject: Re: USB gadget with drivers "on board" In-reply-to: <20100426141605.GO30801@buzzloop.caiaq.de> To: Daniel Mack Cc: Marek Szyprowski , linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Kyungmin Park Message-id: Organization: Samsung Electronics MIME-version: 1.0 Content-type: text/plain; charset=utf-8; format=flowed; delsp=yes Content-transfer-encoding: 8BIT User-Agent: Opera Mail/10.10 (Linux) References: <20100426141605.GO30801@buzzloop.caiaq.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2771 Lines: 54 > On Mon, Apr 26, 2010 at 10:29:05AM +0200, Michał Nazarewicz wrote: >> I need to create an USB gadget with drivers for Windows included >> "on board". In particular, when the gadget is connected to Windows >> host it is detected as mass storage and mounted drive include the >> drivers. However, when the drivers are installed, it is detected >> as some other device. >> >> Now, it seems that a simple composite device with two configurations >> is enough -- the first containing mass storage and the second other >> functions. My tests show that Windows manages to set the first >> configuration and detect the mass storage interface. On Mon, 26 Apr 2010 16:16:05 +0200, Daniel Mack wrote: > Why are you using two configurations on this device instead of one > configuration with two interfaces? Interfaces are not allowed to share > endpoints within one configuration, so they can be used simultaniously. Ideally, I would like to use two configurations on its own just like g_ether that is one configuration with RNDIS and some other functionality and another with CDC ECM and some other functionality. It seems however that such gadgets are not properly detected by Windows as composite devices and thus require a driver (I imagined a single INF should be enough but now I'm not even sure of that) and so I tried adding another configuration with just the mass storage function and this seems to be handled correctly. Now, even if I were to ignore the other RNDIS/ECM multiple personality disorder and sticking to a single configuration with RNDIS there's still an issue (or challenge if you will) of a "Found new driver" dialog popping up like crazy when the device is inserted but the drivers from mass storage didn't have time to install. This is especially true since it was my experience that RDNIS is able to freeze Windows if it's not the first interface. So in the end, I'm looking for a method to get a device that can be plugged in and report as mass storage with drivers but when drivers are installed report as something else. I know it is possible since I encountered several devices that do exactly that. PS. There seem to be some mass with the To and Cc headers in my original message. Sorry about that. -- Best regards, _ _ .o. | Liege of Serenely Enlightened Majesty of o' \,=./ `o ..o | Computer Science, Michał "mina86" Nazarewicz (o o) ooo +---[mina86@mina86.com]---[mina86@jabber.org]---ooO--(_)--Ooo-- -- 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/