labtation: Add code to abstract USB hub handling from servod.
Implement per port power cycling for Cambrionix in a way that
will allow all port cycling to go through this tool and for
servod to have all hub code removed.
BUG=b:278585904
TEST=manual run on a fizz-labstation with a cambronix hub and 10 duts
attached.
Change-Id: Ie6ec69c6d41451bc406ffbba639c1afd49444016
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/labstation/+/5450877
Tested-by: Keith Haddow <haddowk@chromium.org>
Auto-Submit: Keith Haddow <haddowk@chromium.org>
Commit-Queue: Keith Haddow <haddowk@chromium.org>
Reviewed-by: Garry Wang <xianuowang@chromium.org>
24 files changed