usb dongle enumerate as mass storage device

[charles zhuang]

Dan, Inaky,
Thanks for the info. I am contacting Asus now to see if they have a
different usb dongle that works for linux out of the box. As I recall,
the previous post from Andrew Zabolotny stated that his dongle can work,
which I believe it's the same model as mine. I can't get response from
Andrew as what he needs to do.
If I get confirmed from Asus that there's no separate dongle for Linux
only, I will definitely have a try as we discuss here, any way I need to
get it going for my project. Will let you guys know once I have any
update.
Thanks for the quick response.

Charles

-----Original Message-----
From: Inaky Perez-Gonzalez [mailto:inaky at linux.intel.com] 
Sent: Thursday, November 20, 2008 3:21 PM
To: Dan Williams
Cc: charles zhuang; wimax at linuxwimax.org
Subject: Re: usb dongle enumerate as mass storage device

On Thursday 20 November 2008, Dan Williams wrote:
> On Thu, 2008-11-20 at 10:54 -0800, Inaky Perez-Gonzalez wrote:
> > On Thursday 20 November 2008, Dan Williams wrote:
> > > On Wed, 2008-11-19 at 11:50 -0800, Inaky Perez-Gonzalez wrote:
> >
> > [snip]
> >
> > Oh, so that's how they do it? They wait for a eject command to
"change"
> > personas and become their real device?
>
> Yep.  Some Option devices need to be sent the SCSI REZERO command
> instead of a simple eject.  Firmware dependent method really.  The
> Option 'hso' devices have:
>
> -  bDeviceClass            0 (Defined at Interface level)
> -  bDeviceSubClass         0
> -  bDeviceProtocol         0
> +  bDeviceClass          255 Vendor Specific Class
> +  bDeviceSubClass       255 Vendor Specific Subclass
> +  bDeviceProtocol       255 Vendor Specific Protocol
>
> that's - == pre REZERO, + == post REZERO.  Same thing for the Huawei
> modems.  So you can at least usually tell whether it's supposed to be
> the modem or the mass-storage device on the first plug.
>
> > Out of curiosity, how would it work when the device is reconnected
and/or
> > the system boots? The device requires another eject to switch into
being
> > what it should be?
>
> Yep.  On Windows and Mac OS X, the custom drivers that the devices
have
> on their mass-storage CD thing probably handle this for you
> automatically.  As should we under Linux :)

ok, so then we need somebody with enough time on their hands to do that
to see 
what is device really reporting as :)

Thanks for the info!

-- 
Inaky