chromeec: add function to reboot on unexpected image

It's helpful to have a generic function that will tell
the EC to reboot if the EC isn't running a specified
image. Add that and implement google_chromeec_early_init()
to utilize the new function still maintaing its semantics
of if recvoery mode is enabled the EC should be running its
RO image. There is a slight change in that no communication
is done with the EC if not in recovery mode.

BUG=chrome-os-partner:24133
BRANCH=rambi,squawks
TEST=Built and boot with recovery request. Noted EC reboot.

Change-Id: I22240f6a11231e39c33fd79796a52ec76b119397
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/182060
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/5039
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/ec/google/chromeec/ec.h b/src/ec/google/chromeec/ec.h
index a037d0147d..d033bab73a 100644
--- a/src/ec/google/chromeec/ec.h
+++ b/src/ec/google/chromeec/ec.h
@@ -36,7 +36,10 @@ int google_ec_running_ro(void);
 void google_chromeec_init(void);
 #endif
 
+/* If recovery mode is enabled and EC is not running RO firmware reboot. */
 void google_chromeec_early_init(void);
+/* Reboot if EC firmware is not expected type. */
+void google_chromeec_check_ec_image(int expected_type);
 uint8_t google_chromeec_calc_checksum(const uint8_t *data, int size);
 u16 google_chromeec_get_board_version(void);
 u32 google_chromeec_get_events_b(void);