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security/vboot: Add function to read UDC enable flag

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This change adds a helper function to read USB Device Controller (UDC)
enable flag from VBNV.

BUG=b:78577893
BRANCH=poppy

Change-Id: Ifd1e9b0781ffee242d695b72287632bc944a50c7
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/25846
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Furquan Shaikh
2018-04-25 18:13:03 -07:00
parent 557b9bbdf2
commit 37c721d786
3 changed files with 12 additions and 0 deletions
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7
src/security/vboot/vbnv.c
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@@ -147,6 +147,13 @@ int vboot_wants_oprom(void)
return (vbnv_data(BOOT_OFFSET) & BOOT_OPROM_NEEDED) ? 1 : 0;
}
/* Read the USB Device Controller(UDC) enable flag from VBNV. */
int vbnv_udc_enable_flag(void)
{
vbnv_setup();
return (vbnv_data(DEV_FLAGS_OFFSET) & DEV_ENABLE_UDC) ? 1 : 0;
}
void vbnv_init(uint8_t *vbnv_copy)
{
if (IS_ENABLED(CONFIG_VBOOT_VBNV_CMOS))