baseboard/brask: Add the common cbi interface

Add the common cbi control interface for all of the
brask variants.

BUG=b:205646582
TEST=build pass

Change-Id: I5597a4f9023bbed86d077256527d98c4ed2d3a46
Signed-off-by: Zhuohao Lee <zhuohao@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3513272
Reviewed-by: caveh jalali <caveh@chromium.org>
Commit-Queue: caveh jalali <caveh@chromium.org>

3 files changed, 97 insertions, 0 deletions

diff --git a/baseboard/brask/build.mk b/baseboard/brask/build.mk
index 5ba6b135f9..e29bcaf4ac 100644
--- a/baseboard/brask/build.mk
+++ b/baseboard/brask/build.mk
@@ -8,4 +8,5 @@
 
 baseboard-y=
 baseboard-y+=baseboard.o
+baseboard-y+=cbi.o
 baseboard-y+=usb_pd_policy.o
diff --git a/baseboard/brask/cbi.c b/baseboard/brask/cbi.c
new file mode 100644
index 0000000000..038a491f05
--- /dev/null
+++ b/baseboard/brask/cbi.c
@@ -0,0 +1,58 @@
+/* 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 <stdint.h>
+
+#include "console.h"
+#include "common.h"
+#include "cros_board_info.h"
+#include "hooks.h"
+
+#define CPRINTS(format, args...) cprints(CC_SYSTEM, format, ## args)
+#define CPRINTF(format, args...) cprintf(CC_SYSTEM, format, ## args)
+
+static uint8_t board_id;
+
+uint8_t get_board_id(void)
+{
+	return board_id;
+}
+
+__overridable void board_cbi_init(void)
+{
+}
+
+__overridable void board_init_fw_config(void)
+{
+}
+
+__overridable void board_init_ssfc(void)
+{
+}
+
+/*
+ * Read CBI from I2C EEPROM and initialize variables for board variants.
+ */
+static void cbi_init(void)
+{
+	uint32_t cbi_val;
+
+	/* Board ID */
+	if (cbi_get_board_version(&cbi_val) != EC_SUCCESS ||
+	    cbi_val > UINT8_MAX)
+		CPRINTS("CBI: Read Board ID failed");
+	else
+		board_id = cbi_val;
+
+	CPRINTS("Board ID: %d", board_id);
+
+	board_init_fw_config();
+
+	board_init_ssfc();
+
+	/* Allow the board project to make runtime changes based on CBI data */
+	board_cbi_init();
+}
+DECLARE_HOOK(HOOK_INIT, cbi_init, HOOK_PRIO_FIRST);
diff --git a/baseboard/brask/cbi.h b/baseboard/brask/cbi.h
new file mode 100644
index 0000000000..5fa41feadd
--- /dev/null
+++ b/baseboard/brask/cbi.h
@@ -0,0 +1,38 @@
+/* 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.
+ */
+
+/* brask family-specific CBI functions, shared with Zephyr */
+
+#ifndef __CROS_EC_BASEBOARD_CBI_H
+#define __CROS_EC_BASEBOARD_CBI_H
+
+#include "common.h"
+
+/*
+ * Return the board revision number.
+ */
+uint8_t get_board_id(void);
+
+/**
+ * Configure run-time data structures and operation based on CBI data. This
+ * typically includes customization for changes in the BOARD_VERSION and
+ * FW_CONFIG fields in CBI. This routine is called from the baseboard after
+ * the CBI data has been initialized.
+ */
+__override_proto void board_cbi_init(void);
+
+/**
+ * Initialize the FW_CONFIG from CBI data. If the CBI data is not valid, set the
+ * FW_CONFIG to the board specific defaults.
+ */
+__override_proto void board_init_fw_config(void);
+
+/**
+ * Initialize the SSFC from CBI data. If the CBI data is not valid, set the
+ * SSFC to the board specific defaults.
+ */
+__override_proto void board_init_ssfc(void);
+
+#endif /* __CROS_EC_BASEBOARD_CBI_H */