Re: [PATCH 3/3] USB: driver for Freescale QUICC Engine USB Host Controller

Anton Vorontsov
2008-09-23T22:57:41Z

On Wed, Sep 24, 2008 at 01:35:41AM +0400, Sergei Shtylyov wrote:
[...]
>>>>> This controller does not integrate the root hub, so this driver also
>>>>> fakes one-port hub. External hub is required to support more than
>>>>> one device.
>>>>>
>>>>> ...
>>>>>
>>>>>
>>>> Please, no.
>>>>
>>>
>>> What exactly 'no'? ;-)
>>>
>>
>> No one-port hubs I guess -- they are pointless. Though e.g. MUSB
>> driver creates one -- I guess to impersonate a transaction translating
>> high-speed hub...
>>
>
> ... then the root hub emulation is completely pointless.

It isn't. We always should emulate the root hub. The root hub
is part and parcel of any USB Host. Even the one-port one.

--
Anton Vorontsov
email: cbouatmailru@gmail.com
irc://irc.freenode.net/bd2