1 files changed, 108 insertions, 0 deletions
diff --git a/src/ec/google/chromeec/vstore.c b/src/ec/google/chromeec/vstore.c
new file mode 100644
index 0000000000..fd0a7e7366
--- /dev/null
+++ b/src/ec/google/chromeec/vstore.c
@@ -0,0 +1,108 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2015 Google Inc.
+ *
+ * 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 <console/console.h>
+#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+#include "ec.h"
+#include "ec_commands.h"
+
+/*
+ * google_chromeec_vstore_supported - Check if vstore is supported
+ */
+int google_chromeec_vstore_supported(void)
+{
+	return google_chromeec_check_feature(EC_FEATURE_VSTORE);
+}
+
+/*
+ * google_chromeec_vstore_info - Query EC for vstore information
+ *
+ * Returns the number of vstore slots supported by the EC, with the
+ * mask of locked slots saved into passed parameter if it is present.
+ */
+int google_chromeec_vstore_info(uint32_t *locked)
+{
+	struct ec_response_vstore_info info;
+	struct chromeec_command cmd = {
+		.cmd_code     = EC_CMD_VSTORE_INFO,
+		.cmd_size_out = sizeof(info),
+		.cmd_data_out = &info,
+	};
+
+	if (google_chromeec_command(&cmd) != 0)
+		return 0;
+
+	if (locked)
+		*locked = info.slot_locked;
+	return info.slot_count;
+}
+
+/*
+ * google_chromeec_vstore_read - Read data from EC vstore slot
+ *
+ * @slot: vstore slot to read from
+ * @data: buffer to store read data, must be EC_VSTORE_SLOT_SIZE bytes
+ */
+int google_chromeec_vstore_read(int slot, uint8_t *data)
+{
+	struct ec_params_vstore_read req = {
+		.slot         = slot,
+	};
+	struct chromeec_command cmd = {
+		.cmd_code     = EC_CMD_VSTORE_READ,
+		.cmd_size_in  = sizeof(req),
+		.cmd_data_in  = &req,
+		.cmd_size_out = EC_VSTORE_SLOT_SIZE,
+		.cmd_data_out = data,
+	};
+
+	if (!data || req.slot >= EC_VSTORE_SLOT_MAX)
+		return -1;
+
+	return google_chromeec_command(&cmd);
+}
+
+/*
+ * google_chromeec_vstore_write - Save data into EC vstore slot
+ *
+ * @slot: vstore slot to write into
+ * @data: data to write
+ * @size: size of data in bytes
+ *
+ * Maximum size of data is EC_VSTORE_SLOT_SIZE.  It is the callers
+ * responsibility to check the number of implemented slots by
+ * querying the vstore info.
+ */
+int google_chromeec_vstore_write(int slot, uint8_t *data, size_t size)
+{
+	struct ec_params_vstore_write req = {
+		.slot         = slot,
+	};
+	struct chromeec_command cmd = {
+		.cmd_code     = EC_CMD_VSTORE_WRITE,
+		.cmd_size_in  = sizeof(req),
+		.cmd_data_in  = &req,
+	};
+
+	if (req.slot >= EC_VSTORE_SLOT_MAX || size > EC_VSTORE_SLOT_SIZE)
+		return -1;
+
+	memcpy(req.data, data, size);
+
+	return google_chromeec_command(&cmd);
+}