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b83dbc3199
Re-order logic in BC1.2 detection task so that we open the USB switches immediately upon detecting a connection, then debounce the connection, then reset the pericom and determine BC1.2 charger type. This fixes two problems: - Problem where host could enumerate dut, detect disconnect, and then re-enumerate. - Problem where sometimes dut would detect a host workstation as a proprietary charger because we weren't delaying long enough after opening USB switches before triggering pericom reset. BUG=chrome-os-partner:47219 BRANCH=smaug TEST=tested by connecting workstation to ryu (tested both pluggin in A side first and C side first). Without this patch, my workstation often see's disconnect and reconnect. With this change we only get one connect. Change-Id: I07cc3473ff32953fad3cc6d1db01b86b44969c4e Signed-off-by: Alec Berg <alecaberg@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/311804 Reviewed-by: Shawn N <shawnn@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit