mainboard/intel/kblrvp: Add support to read board ID from EC

Add a function to identify an Intel RVP board by querying EC

Change-Id: I21337000827639fb8f22c5ee9bc5d86f1ebe1e74
Signed-off-by: Aamir Bohra <aamir.bohra@intel.com>
Reviewed-on: https://review.coreboot.org/17283
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Naresh Solanki <naresh.solanki@intel.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 32 insertions, 0 deletions

diff --git a/src/mainboard/intel/kblrvp/board_id.c b/src/mainboard/intel/kblrvp/board_id.c
new file mode 100644
index 0000000000..a362b08df8
--- /dev/null
+++ b/src/mainboard/intel/kblrvp/board_id.c
@@ -0,0 +1,32 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+#include "board_id.h"
+#include <ec/acpi/ec.h>
+#include <stdint.h>
+
+/*
+ * Get Board ID via EC I/O port write/read
+ */
+int get_board_id(void)
+{
+	uint8_t buffer[2];
+	uint8_t index;
+	if (send_ec_command(EC_FAB_ID_CMD) == 0) {
+		for (index = 0; index < sizeof(buffer); index++)
+			buffer[index] = recv_ec_data();
+		return (buffer[1] << 8) | buffer[0];
+	}
+	return -1;
+}