From: Francisco J Ballesteros <nemo@lsub.org>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] usb vid/did
Date: Fri, 7 Jan 2011 17:48:44 +0100 [thread overview]
Message-ID: <AANLkTi=pM8xY8MU0==2JdfkzMw7QxA-PTr4saMUNHRxG@mail.gmail.com> (raw)
In-Reply-To: <4966b6590436322b2ca11f5162a547e6@coraid.com>
Ah.
A root hub is an invention of the usb std.
There's no such thing. It's the controller.
It can be that usbd does not write vid/did for root hubs, perhaps.
I've not seen a root hub in a keyboard. If it's a usb keyboard, it can't be
a root hub, because you have to plug the kbd into a port, which
belongs to a hub,
root or not.
On Fri, Jan 7, 2011 at 4:59 PM, erik quanstrom <quanstro@labs.coraid.com> wrote:
>>> ep3.0/ctl:hub csp 0x000009 ports 3 'Mitsumi Electric' 'Hub in Apple Extended USB Keyboard' ehci
>
>>I do see vids/dids just not for hubs.
>
> perhaps i misunderstand what is ment by a "root hub".
> i thought that ment that it was a hub that usb(3) invented.
> a hub in a keyboard can't be a root hub, can it?
>
> - erik
>
>
next prev parent reply other threads:[~2011-01-07 16:48 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-07 13:12 erik quanstrom
2011-01-07 14:28 ` Nemo
2011-01-07 15:36 ` Gorka Guardiola
2011-01-07 15:59 ` erik quanstrom
2011-01-07 16:48 ` Francisco J Ballesteros [this message]
2011-01-07 16:52 ` erik quanstrom
2011-01-07 17:21 ` Gorka Guardiola
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