From: Greg KH <greg@kroah.com>
To: linux-hotplug@vger.kernel.org
Subject: Re: Clarification regarding USB Data Card (Dongle) enumeration in Linux udev
Date: Mon, 05 May 2014 17:09:24 +0000 [thread overview]
Message-ID: <20140505170924.GC4850@kroah.com> (raw)
In-Reply-To: <CALR+S1ivJ88=kEhKOPancq-GzJdApsV_DaJOV3djPZSQhETV7Q@mail.gmail.com>
On Mon, May 05, 2014 at 09:13:08AM +0530, Suresh Kumar N. wrote:
> Dear Greg,
>
> Data Card here refers to 3G Dongle.
There is not any "standard" for these.
> Yes, it is right; device enumeration depends on the device itself.
> But, there must be some guideline defined regarding the same.
>
> As per the link (http://www.linux-usb.org/usb.devices.txt) USB device
> cannot be enumerated as Network controllers, please correct me if
> something has been overlooked.
Not true, I have a usb network device right here.
> Would all 3G Dongle devices be enumerated as "ACM USB modems"?
Not at all, some show up as a custom USB to serial device, some as a
network device, and others as a ACM modem.
Again, look at the USB descriptors in the device, that will tell you how
the device is to be communicated with.
greg k-h
next prev parent reply other threads:[~2014-05-05 17:09 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-04 9:34 Clarification regarding USB Data Card (Dongle) enumeration in Linux udev Suresh Kumar N.
2014-05-04 16:16 ` Greg KH
2014-05-05 3:55 ` Suresh Kumar N.
2014-05-05 17:09 ` Greg KH [this message]
2014-05-06 3:19 ` Suresh Kumar N.
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