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| author | Duncan Laurie <dlaurie@google.com> | 2018-04-12 10:20:16 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2018-04-17 15:47:13 -0700 |
| commit | 534194ead77895dd131ed59b968b21a2ae36f133 (patch) | |
| tree | 28506beacf01d948e008b903b21e2b27e41a9e92 /firmware/include | |
| parent | f2a16b86fa1830e425fa66923b8ed3e2099b955d (diff) | |
| download | vboot-534194ead77895dd131ed59b968b21a2ae36f133.tar.gz | |
Add new NV and GBB flag to control UDC
This change adds a new NV and GBB flag for controlling USB device
mode behavior, adding an additional step to enable UDC on systems
that support it.
Users of this feature will need to first enable developer mode and
then enable UDC separately by running "crossystem dev_enable_udc=1".
Alternatively those without write protect enabled can set a GBB
flag to have UDC enabled by default while in developer mode.
This is based on the security reviewed proposal at
https://docs.google.com/document/d/1b6avd9xvhvljN_NKtctWrClj4mSYZ_uPmp7MmAnPwqs
BUG=b:74339386
BRANCH=poppy
TEST=manual testing on Eve device
Change-Id: I6f440320f28b033639b53246d3034bc8acc37a33
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1010769
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Diffstat (limited to 'firmware/include')
| -rw-r--r-- | firmware/include/gbb_header.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/firmware/include/gbb_header.h b/firmware/include/gbb_header.h index 11586e92..b880468d 100644 --- a/firmware/include/gbb_header.h +++ b/firmware/include/gbb_header.h @@ -76,6 +76,8 @@ #define GBB_FLAG_FORCE_MANUAL_RECOVERY 0x00004000 /* Disable using FWMP */ #define GBB_FLAG_DISABLE_FWMP 0x00008000 +/* Enable USB Device Controller */ +#define GBB_FLAG_ENABLE_UDC 0x00010000 #ifdef __cplusplus |