Some devices allow to retrieve firmware version by reading the same 4
byte register repeatedly until the entire version string is read.
Let's print out TPM firmware version when available. Just in case
something goes wrong limit the version string length to 200 bytes.
CQ-DEPEND=CL:355701
BRANCH=none
BUG=chrome-os-partner:54723
TEST=built the new firmware and ran it on Gru, observed the following
in the coreboot console log:
Connected to device vid:did:rid of 1ae0:0028:00
Firmware version: cr50_v1.1.4792-7a44484
Change-Id: Idb069dabb80d34a0efdf04c3c40a42ab0c8a3f94
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/355704
Reviewed-by: Scott Collyer <scollyer@chromium.org>
1f54a30ceb