From 37c721d78669ed2141981c990a3e8eb1f538fdb4 Mon Sep 17 00:00:00 2001
From: Furquan Shaikh <furquan@google.com>
Date: Wed, 25 Apr 2018 18:13:03 -0700
Subject: security/vboot: Add function to read UDC enable flag

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>
---
 src/security/vboot/vbnv.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src/security/vboot/vbnv.c')

diff --git a/src/security/vboot/vbnv.c b/src/security/vboot/vbnv.c
index 0fecacd4d2..636e5e3806 100644
--- a/src/security/vboot/vbnv.c
+++ b/src/security/vboot/vbnv.c
@@ -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))
-- 
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