Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757409AbXFSJJS (ORCPT ); Tue, 19 Jun 2007 05:09:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754489AbXFSJJI (ORCPT ); Tue, 19 Jun 2007 05:09:08 -0400 Received: from nz-out-0506.google.com ([64.233.162.235]:23735 "EHLO nz-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752818AbXFSJJG (ORCPT ); Tue, 19 Jun 2007 05:09:06 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; b=VuzSIjJJeyei04TYwxzkfVEfxL8GnD29uXLNhIidxqFWwH1pIQK2KOUJR1QG9f4WvrMUIW8bfOm0WUml8N3c7oUe6ll5U+geGqPrb7sEFeoxXJ+4Sak6Bg4eAQxllLtkVxjM+a+0XsdVHssHH6lUBZu+ZZ1AqudgmmyaadS3Zdk= Message-ID: <3ae72650706190209i77b577aaue7324825587358b4@mail.gmail.com> Date: Tue, 19 Jun 2007 11:09:05 +0200 From: "Kay Sievers" To: "Greg KH" Subject: Re: [Linux-usb-users] Stable identification of identical USB hardware Cc: "Joerg Pommnitz" , linux-kernel@vger.kernel.org, linux-usb-users@lists.sourceforge.net In-Reply-To: <20070618203312.GA13990@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <157636.91774.qm@web51404.mail.re2.yahoo.com> <20070618203312.GA13990@kroah.com> X-Google-Sender-Auth: 52bf3ebbafc37d6d Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1927 Lines: 51 On 6/18/07, Greg KH wrote: > On Mon, Jun 18, 2007 at 08:35:35AM -0700, Joerg Pommnitz wrote: > > I want to be able to distinguish between two (or more) mostly > > identical USB serial devices. The devices in question are UMTS modems. > > AFAIK they are identical except for the SIM card and the point of > > attachment. Externally the cards are CardBus devices with an > > integrated USB host adapter. The actual UMTS device is (internally) > > connected to the USB host adapter. > > > > If I have to cardbus sockets, how do I get from what I know ("the card > > is in socket 0") to "I have to talk to ttyUSB2 to talk to the card"? I > > suspect I have to follow the thread from /sys/bus/pci to > > /sys/bus/usb/devices, but how exactly? > > Walk up the "chain" of devices in sysfs and in udev. The udev man pages > and documentation should show you how to do this. If you have specific > questions about this, please ask them on the linux-hotplug-devel mailing > list. This should create a symlink for the serial device in the first slot: KERNEL="ttyUSB*", SUBSYSTEMS=="pcmcia", KERNELS=="0.0", SYMLINK+="serial-slot0" You find the keys used with udevinfo. Here is an example for a PCMCIA CF Memory card: udevinfo --attribute-walk --name hda4 ... looking at device '/block/hda/hda4': KERNEL=="hda4" SUBSYSTEM=="block" ... looking at parent device '/devices/pci0000:00/0000:00:1e.0/0000:04:00.0/0.0': KERNELS=="0.0" SUBSYSTEMS=="pcmcia" DRIVERS=="ide-cs" ... looking at parent device '/devices/pci0000:00/0000:00:1e.0/0000:04:00.0': KERNELS=="0000:04:00.0" SUBSYSTEMS=="pci" DRIVERS=="yenta_cardbus" ... Kay - 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/