primus: Add SSFC field for 2nd trackpoint

BUG=b:226215983
BRANCH=none
TEST=make -j BOARD=primus

Signed-off-by: Scott Chao <scott_chao@wistron.corp-partner.google.com>
Change-Id: If7deaf7498a4e0e2f7a30b9eb3b92913ab1bd76c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3552610
Reviewed-by: caveh jalali <caveh@chromium.org>
Commit-Queue: caveh jalali <caveh@chromium.org>

3 files changed, 62 insertions, 0 deletions

diff --git a/board/primus/build.mk b/board/primus/build.mk
index 217f95da10..ddf50b46e2 100644
--- a/board/primus/build.mk
+++ b/board/primus/build.mk
@@ -14,6 +14,7 @@ BASEBOARD:=brya
 board-y=
 board-y+=battery.o
 board-y+=board.o
+board-y+=cbi_ssfc.o
 board-y+=charger.o
 board-y+=fans.o
 board-y+=fw_config.o
diff --git a/board/primus/cbi_ssfc.c b/board/primus/cbi_ssfc.c
new file mode 100644
index 0000000000..dd59bb2c9f
--- /dev/null
+++ b/board/primus/cbi_ssfc.c
@@ -0,0 +1,30 @@
+/* Copyright 2022 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 "compile_time_macros.h"
+#include "console.h"
+#include "cros_board_info.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 primus_cbi_ssfc cached_ssfc;
+BUILD_ASSERT(sizeof(cached_ssfc) == sizeof(uint32_t));
+
+void board_init_ssfc(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);
+}
+
+enum ec_ssfc_trackpoint get_cbi_ssfc_trackpoint(void)
+{
+	return cached_ssfc.trackpoint;
+}
diff --git a/board/primus/cbi_ssfc.h b/board/primus/cbi_ssfc.h
new file mode 100644
index 0000000000..d1ad8c991f
--- /dev/null
+++ b/board/primus/cbi_ssfc.h
@@ -0,0 +1,31 @@
+/* Copyright 2022 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 _PRIMUS_CBI_SSFC_H_
+#define _PRIMUS_CBI_SSFC_H_
+#include "stdint.h"
+/****************************************************************************
+ * Primus CBI Second Source Factory Cache
+ */
+/*
+ * Trackpoint (Bit 0)
+ */
+enum ec_ssfc_trackpoint {
+	SSFC_SENSOR_TRACKPOINT_ELAN = 0,
+	SSFC_SENSOR_TRACKPOINT_SYNAPTICS = 1,
+};
+union primus_cbi_ssfc {
+	struct {
+		enum ec_ssfc_trackpoint trackpoint : 2;
+		uint32_t reserved_1 : 30;
+	};
+	uint32_t raw_value;
+};
+/**
+ * Get the trackpoint type from SSFC_CONFIG.
+ *
+ * @return the Trackpoint board type.
+ */
+enum ec_ssfc_trackpoint get_cbi_ssfc_trackpoint(void);
+#endif /* _PRIMUS_CBI_SSFC_H_ */