1. Make the xHCI driver to support xHCI controller v1.1
2. And a new function xhci_ring_doorbell(), it aims to
add a memory barrier before ring the doorbell, ensure
all TRB changes are written to memory.
BRANCH=none
BUG=chrome-os-partner:52684
TEST=boot from USB on Kevin rk3399 platform
Change-Id: I4e38e04dc3c7d32ee4bb424a473c70956a3c3ea9
Signed-off-by: Liangfeng Wu <wulf@rock-chips.com>
Reviewed-on: https://chromium-review.googlesource.com/346831
Commit-Ready: Brian Norris <briannorris@chromium.org>
Tested-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>