Georg Acher wrote:
>
> Hi,
> I'm currently fighting with the timing in hub.c...
>
> The Polestar USB audio device (with the Philips UDA1321) doesn't work anymore
> with the current hub code (it worked a long time ago), the result after a
> plugin is the usual "USB device not accepting new address". This happens
> with both UHCI and OHCI, so it's not a HCD issue.
>
> When inserting a wait_ms(300) in usb_hub_port_reset, it gets detected at the
> second try, with a larger delay is works at the first try. However this long
> delay is not applicable with the current "single-device handling" of hub.c,
> since it would take too long for more than a few connected devices... But
> the long delays are obviously needed for some devices.
>
> Any ideas (ehm.. volunteers) to solve that issue?
>
> Another observation:
>
> Some early engineering samples of the Ericsson USB-Bluetooth modules also
> have problems, they used to work after manually shorting D- to GND, but that
> doesn't also work anymore. I haven't found a workaround for that yet.
>
> However, the modules are properly detected in Windows 2000, so Linux
> apparently does something wrong.
>
Can you reset the modules (eg. firmware update) with Windows and how
look the reset sequence.
> BTW: The USB-analyzer showed a very interesting init sequence for Windows:
>
> 20ms USB-Reset
> Get device descriptor (64bytes)
> 15ms USB-Reset
> Set address
> Get device descriptor
> ...
>
Is there a loop when you connect the Polestar USB audio device with
Windows?
eg. Reset -
get device descriptor -
Reset -
get device descriptor -
Reset -
...
Reset -
Set address
...
- Roman
> --
> Georg Acher, [EMAIL PROTECTED]
> http://www.in.tum.de/~acher/
> "Oh no, not again !" The bowl of petunias
>
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