lkml.org 
[lkml]   [2008]   [Sep]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 3/3] USB: driver for Freescale QUICC Engine USB Host Controller
Hello, I 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.
>
> Hm, maybe that's what USB core thinks (because UHCI/OHCI/EHCI all
> have it) but e.g. MUSB doesn't have the root hub registers...

Oops, I stand corrected. Even USB 1.1 specifies that it must be a
part the host...

WBR, Sergei




\
 
 \ /
  Last update: 2008-09-24 12:51    [W:0.048 / U:0.068 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site