struct usb_config: pass custom parameter to callback?
Hans Petter Selasky
hselasky at c2i.net
Fri Nov 12 15:25:34 UTC 2010
On Friday 12 November 2010 16:01:44 Lev Serebryakov wrote:
> Hello, Freebsd-usb.
> Is it possible to pass custom parameter to xfer callback, configured
> via "struct usb_config"?
> I'm writing driver for device, which have multiple equivalent ports,
> each whith its own paor of pipes (for IN and OUT), and I want to use
> only two callbacks. Is it possible? Or should I make N pairs
> of almost-the-same thunk functions?
There is usbd_xfer_get/set_priv() and usbd_xfer_softc() which you can use to
get and set private and softc alike structure pointers after that the USB
transfers are setup. Any more custom parameters you need wrap using callback
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