linux-kernel - Re: Stable identification of identical USB hardware

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Message-ID: <20070618170027.GA11233@elmicha>
Date:	Mon, 18 Jun 2007 19:00:27 +0200
From:	Michael Mauch <michael.mauch@....de>
To:	linux-kernel@...r.kernel.org
Subject: Re: Stable identification of identical USB hardware

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?

You should be able to distinguish the devices with udev. Have a look at
http://www.reactivated.net/writing_udev_rules.html 

If that doesn't help, I would like to propose that you ask again in
the de.comp.os.unix.linux.hardware or comp.os.linux.hardware newsgroups.

Regards...
		Michael

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