Recently I noticed my NomadII MG mp3 player stopped communicating when
plugged in to a uhci controller (using either uhci driver). It looks like
the Nomad driver does a bunch of Control-In transfers with zero length data
to signal the device.
Using uhci, the status transaction of the transfer is
On Mon, Dec 03, 2001 at 02:16:53PM -0800, Tom Clark wrote:
> Recently I noticed my NomadII MG mp3 player stopped communicating when
> plugged in to a uhci controller (using either uhci driver). It looks like
> the Nomad driver does a bunch of Control-In transfers with zero length data
> to signal
ot;Tom Clark" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, December 03, 2001 2:16 PM
Subject: [linux-usb-devel] UHCI and zero data control transfer
> Recently I noticed my NomadII MG mp3 player stopped communicating when
> plugged in to a uhci controller (using eit
On Mon, Dec 03, 2001, David Brownell <[EMAIL PROTECTED]> wrote:
> I'm not following. If there's really a zero length data IN, the USB
> transactions should be (yes?):
>
> OUT (setup, 8 bytes)
This is a SETUP packet BTW.
> IN (data, 0 bytes)
> OUT (status, 0 bytes).
>
> Which i
> > OUT (setup, 8 bytes)
>
> This is a SETUP packet BTW.
Yes, but I was talking about direction ... see section 8.5.3 of the
USB (2.0) spec. It says that if there's no data phase (vs one of
zero length, as shown here) the status is an IN ... the status phase
is always flagged by a change of
On Mon, Dec 03, 2001, David Brownell <[EMAIL PROTECTED]> wrote:
> > > OUT (setup, 8 bytes)
> >
> > This is a SETUP packet BTW.
>
> Yes, but I was talking about direction ... see section 8.5.3 of the
> USB (2.0) spec. It says that if there's no data phase (vs one of
> zero length, as shown h
Actually, it's more along the lines of what Johannes outlined. Running the
same transfers through a CATC USB Chief, I can see that a successful
transfer looks like this :
SETUP
OUT
This looks the exact same way when using a Linux box w/ OHCI and on a
Macintosh (OHCI also).
Using the Linux UHC
> Actually, it's more along the lines of what Johannes outlined. Running the
> same transfers through a CATC USB Chief, I can see that a successful
> transfer looks like this :
>
> SETUP
> OUT
That's what I was hoping didn't happen ... :)
> This looks the exact same way when using a Linux box
On Mon, 2001-12-03 at 14:46, Greg KH wrote:
> On Mon, Dec 03, 2001 at 02:16:53PM -0800, Tom Clark wrote:
> > Recently I noticed my NomadII MG mp3 player stopped communicating when
> > plugged in to a uhci controller (using either uhci driver). It looks like
> > the Nomad driver does a bunch of Co
on 12/3/01 3:53 PM, David Brownell at [EMAIL PROTECTED] wrote:
>> Actually, it's more along the lines of what Johannes outlined. Running the
>> same transfers through a CATC USB Chief, I can see that a successful
>> transfer looks like this :
>>
>> SETUP
>> OUT
>
> That's what I was hoping did
10 matches
Mail list logo
