zork: add support SSFC

This patch add support SSFC for zork,
add support base sensor as below:
	SSFC_BASE_GYRO_BMI160 = 1,
	SSFC_BASE_GYRO_LSM6DSM = 2,
	SSFC_BASE_GYRO_ICM426XX = 3,

BUG=b:173753906
BRANCH=zork
TEST=make buildall

Signed-off-by: Zick Wei <zick.wei@quanta.corp-partner.google.com>
Change-Id: I10749d819b852861ac5a32d69f2b872527633082
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2641706
Reviewed-by: Edward Hill <ecgh@chromium.org>

3 files changed, 72 insertions, 0 deletions

diff --git a/baseboard/zork/build.mk b/baseboard/zork/build.mk
index 740252ac9a..e79d60cc91 100644
--- a/baseboard/zork/build.mk
+++ b/baseboard/zork/build.mk
@@ -8,6 +8,7 @@
 
 baseboard-y=baseboard.o
 baseboard-y+=cbi_ec_fw_config.o
+baseboard-y+=cbi_ssfc.o
 baseboard-$(CONFIG_USB_POWER_DELIVERY)+=usb_pd_policy.o
 baseboard-$(VARIANT_ZORK_TREMBYLE)+=variant_trembyle.o
 baseboard-$(VARIANT_ZORK_DALBOZ)+=variant_dalboz.o
diff --git a/baseboard/zork/cbi_ssfc.c b/baseboard/zork/cbi_ssfc.c
new file mode 100644
index 0000000000..cf1001e5c2
--- /dev/null
+++ b/baseboard/zork/cbi_ssfc.c
@@ -0,0 +1,31 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "cbi_ssfc.h"
+#include "common.h"
+#include "console.h"
+#include "cros_board_info.h"
+#include "hooks.h"
+
+#define CPRINTS(format, args...) cprints(CC_SYSTEM, format, ##args)
+
+/* Cache SSFC on init since we don't expect it to change in runtime */
+static union zork_cbi_ssfc cached_ssfc;
+BUILD_ASSERT(sizeof(cached_ssfc) == sizeof(uint32_t));
+
+static void cbi_ssfc_init(void)
+{
+	if (cbi_get_ssfc(&cached_ssfc.raw_value) != EC_SUCCESS)
+		/* Default to 0 when CBI isn't populated */
+		cached_ssfc.raw_value = 0;
+
+	CPRINTS("Read CBI SSFC : 0x%04X", cached_ssfc.raw_value);
+}
+DECLARE_HOOK(HOOK_INIT, cbi_ssfc_init, HOOK_PRIO_FIRST);
+
+enum ec_ssfc_base_gyro_sensor get_cbi_ssfc_base_sensor(void)
+{
+	return cached_ssfc.base_sensor;
+}
diff --git a/baseboard/zork/cbi_ssfc.h b/baseboard/zork/cbi_ssfc.h
new file mode 100644
index 0000000000..de073847e7
--- /dev/null
+++ b/baseboard/zork/cbi_ssfc.h
@@ -0,0 +1,40 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef _ZORK_CBI_SSFC__H_
+#define _ZORK_CBI_SSFC__H_
+
+#include "stdint.h"
+
+/****************************************************************************
+ * Zork CBI Second Source Factory Cache
+ */
+
+/*
+ * Base Sensor (Bits 0-2)
+ */
+enum ec_ssfc_base_gyro_sensor {
+	SSFC_BASE_GYRO_NONE = 0,
+	SSFC_BASE_GYRO_BMI160 = 1,
+	SSFC_BASE_GYRO_LSM6DSM = 2,
+	SSFC_BASE_GYRO_ICM426XX = 3,
+};
+
+union zork_cbi_ssfc {
+	struct {
+		enum ec_ssfc_base_gyro_sensor	base_sensor : 3;
+		uint32_t			reserved : 29;
+	};
+	uint32_t raw_value;
+};
+
+/**
+ * Get the Base sensor type from SSFC_CONFIG.
+ *
+ * @return the Base sensor board type.
+ */
+enum ec_ssfc_base_gyro_sensor get_cbi_ssfc_base_sensor(void);
+
+#endif /* _ZORK_CBI_SSFC__H_ */