Can anyone tell me if there is a difference in the way EHCI v OHCI/UHCI
hardware handles bulk OUT transfers that end on a max packet size
boundary.
The flag URB_ZERO_PACKET adds a ZLP if required, but
the EHCI spec says that it will always do that anyway. I presume this
is different to OHCI and UHCI (I don't have those specs).
I'm
looking for a reason why a CDC-like device fails to fully receive a
bulk OUT transfer sometimes for full-speed setups but never for
high-speed. The driver does not set URB_ZERO_PACKET, but the gadget
requires a ZLP or short packet to signify the end of a bulk OUT
transfer.
Is URB_ZERO_PACKET ever required for EHCI?
Could EHCI disguise the fact that URB_ZERO_PACKET is required for OHCI and UHCI?
--
Rich
Yahoo!7 recommends that you update your browser to the new Internet Explorer 8.Get it now.
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
