Octopus: Initiate the first version of parsing SSFC of CBI

Initiate the helper functions to parse the SSFC of CBI. The first and
only component in this version is TCPC in the port 1.

BRANCH=octopus
BUG=b:163922535
TEST=EC log of Meep device can output value of SSFC in CBI

Signed-off-by: Marco Chen <marcochen@chromium.org>
Change-Id: Iaee608a8b9791796fff0b31599c8be1bdc07cf3e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2377058
Reviewed-by: Diana Z <dzigterman@chromium.org>
(cherry picked from commit e4d6fd51470e8e5302e20c0916da807bcb879208)
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2385018
Reviewed-by: Henry Sun <henrysun@google.com>
Commit-Queue: Henry Sun <henrysun@google.com>
Tested-by: Henry Sun <henrysun@google.com>

3 files changed, 61 insertions, 1 deletions

diff --git a/baseboard/octopus/build.mk b/baseboard/octopus/build.mk
index efb37acb04..bb8a6f8267 100644
--- a/baseboard/octopus/build.mk
+++ b/baseboard/octopus/build.mk
@@ -6,7 +6,7 @@
 # Baseboard specific files build
 #
 
-baseboard-y=baseboard.o
+baseboard-y=baseboard.o cbi_ssfc.o
 baseboard-$(CONFIG_USB_POWER_DELIVERY)+=usb_pd_policy.o
 baseboard-$(VARIANT_OCTOPUS_EC_NPCX796FB)+=variant_ec_npcx796fb.o
 baseboard-$(VARIANT_OCTOPUS_EC_ITE8320)+=variant_ec_ite8320.o
diff --git a/baseboard/octopus/cbi_ssfc.c b/baseboard/octopus/cbi_ssfc.c
new file mode 100644
index 0000000000..e4048e898f
--- /dev/null
+++ b/baseboard/octopus/cbi_ssfc.c
@@ -0,0 +1,34 @@
+/* Copyright 2020 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"
+
+/****************************************************************************
+ * Octopus CBI Second Source Factory Cache
+ */
+
+#define CPRINTS(format, args...) cprints(CC_SYSTEM, format, ##args)
+
+/* Cache SSFC on init since we don't expect it to change in runtime */
+static uint32_t cached_ssfc;
+
+static void cbi_ssfc_init(void)
+{
+	if (cbi_get_ssfc(&cached_ssfc) != EC_SUCCESS)
+		/* Default to 0 when CBI isn't populated */
+		cached_ssfc = 0;
+
+	CPRINTS("CBI SSFC: 0x%04X", cached_ssfc);
+}
+DECLARE_HOOK(HOOK_INIT, cbi_ssfc_init, HOOK_PRIO_FIRST);
+
+enum ssfc_tcpc_p1 get_cbi_ssfc_tcpc_p1(void)
+{
+	return ((cached_ssfc & SSFC_TCPC_P1_MASK) >> SSFC_TCPC_P1_OFFSET);
+}
diff --git a/baseboard/octopus/cbi_ssfc.h b/baseboard/octopus/cbi_ssfc.h
new file mode 100644
index 0000000000..e8ef54e3fc
--- /dev/null
+++ b/baseboard/octopus/cbi_ssfc.h
@@ -0,0 +1,26 @@
+/* Copyright 2020 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 _OCTOPUS_CBI_SSFC__H_
+#define _OCTOPUS_CBI_SSFC__H_
+
+/****************************************************************************
+ * Octopus CBI Second Source Factory Cache
+ */
+
+/*
+ * TCPC Port 1 (Bits 0-2)
+ */
+enum ssfc_tcpc_p1 {
+	TCPC_P1_DEFAULT,
+	TCPC_P1_PS8751,
+	TCPC_P1_PS8755,
+};
+#define SSFC_TCPC_P1_OFFSET		0
+#define SSFC_TCPC_P1_MASK		GENMASK(2, 0)
+
+enum ssfc_tcpc_p1 get_cbi_ssfc_tcpc_p1(void);
+
+#endif /* _OCTOPUS_CBI_SSFC__H_ */