This patch adds an API which exports current physical presence state
machine state to allow the caller to see if the state machine is in
one of the three distinct states:
- no PP process in progress
- user PP input is expected
- PP process in progress, user input is not currently expected
BRANCH=cr50
BUG=b:62537474
TEST=with the rest of the patches applied verified that PP state is
properly communicated through this API.
Change-Id: Ia10cd20c490dadef595f30e0b7257e51b6abf8fa
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/860998
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Mary Ruthven <mruthven@chromium.org>
This will be used as part of case closed debugging configuration.
Currently, this only adds the state machine, and a test command which
is available when CR50_DEV=1. It also adds a new sleep mask flag for
physical presence detect, instead of oveloading FORCE_NO_DSLEEP.
The physical presence state machine supports both short (tap 5 times
in 15 seconds) and long (short, followed by 4 more taps 1-5 minutes
apart) sequences. It will call a callback function at the end of the
sequence, so that multiple things can each request physical presence
in turn. This will be used by ccdopen / ccdunlock / testlab commands
for CCD V1.
Eventually, CCD config will replace the unlock sequence handling in
wp.c. But for now, we don't touch that.
See go/cr50-ccd-wp for more information.
BUG=b:62537474
BRANCH=none
TEST=manual
Short sequence:
pp short
pp
pp
pp # See "Physical presence good"
Timeout
pp short
pp # 15 sec later, get timeout error
Long sequence:
pp long
pp
pp
pp
(wait 2 sec)
pp
(wait 2 sec)
pp # See "PP good"
Long sequence, presses too fast:
pp long
pp
pp
pp
pp # See "PP L too soon"
(wait 2 sec)
pp
(wait 2 sec)
pp # See "Physical presence good"
Abort:
pp short
pp abort # See "Physical presence aborted"
Change-Id: I09da81ad11d328e7d7740c3fe838a5f67d7b8708
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/568796
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-by: Mary Ruthven <mruthven@chromium.org>
