svn commit: r186730 - in head: lib/libusb20 sys/dev/usb2/controller sys/dev/usb2/core sys/dev/usb2/ethernet sys/dev/usb2/image sys/dev/usb2/include sys/dev/usb2/serial sys/dev/usb2/sound sys/dev/us...

[Stanislav Sedov]

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On Tue, 6 Jan 2009 17:51:26 +0100
Hans Petter Selasky <hselasky at c2i.net> mentioned:

> On Tuesday 06 January 2009, Stanislav Sedov wrote:
> > On Tue, 6 Jan 2009 16:13:32 +0100
> >
> > Hans Petter Selasky <hselasky at c2i.net> mentioned:
> > > Try:
> > >
> > > usbconfig -u 0 -a 2 set_config 1
> >
> > This helps. Now ubsa attaches to the device. But I can't communicate
> > with it (no echo even). I see the following messages in the log:
> > ubsa_cfg_request:395: device request failed, err=USB_ERR_STALLED (ignored)
> > ubsa_cfg_request:395: device request failed, err=USB_ERR_STALLED (ignored)
> > ubsa_cfg_request:395: device request failed, err=USB_ERR_STALLED (ignored)
> >
> > > You can for example add a quirk for this, see "usbconfig -h | grep -i
> > > quirk". I know this is not so easy, but if you can make a general rule
> > > for when selecting another configuration, I will add it.
> >
> > Why not let the driver to set the config?
> 
> Because:
> 
> 1) it clashes with USB device side mode, where the config index is received 
> from Host
> 
> 2) Different device drivers might want different configurations.
> 
> 3) The driver for the active configuration might not be loaded.
>

I see.

> This is interesting:
> >   bNumConfigurations = 0x0001
> 
> The device says it only has one configuration! So setting index 1 should not 
> be allowed.
> 
> Could you try to change the check in the ubsa2.c probe routine to check for 
> config index 0 instead?
> 

It attaches but doesn't work with the same error message as listed above.


> >       iInterface = 0x0003  <retrieving string failed>
> 
> When you cannot retrive the strings, I think your device is gone! (Crashed)

So at this point the device is effectively detached? Do you have ideas why that
might happen. I don't also understand how it may work with config index 1 on old
stack if the maximum number of configurations is 1 too... Looks weird.

- -- 
Stanislav Sedov
ST4096-RIPE
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