1 files changed, 122 insertions, 0 deletions
diff --git a/drivers/mxc/security/rng/fsl_shw_rand.c b/drivers/mxc/security/rng/fsl_shw_rand.c
new file mode 100644
index 000000000000..7ba49d8d470f
--- /dev/null
+++ b/drivers/mxc/security/rng/fsl_shw_rand.c
@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2005-2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+
+/*!
+ * @file fsl_shw_rand.c
+ *
+ * This file implements Random Number Generation functions of the FSL SHW API
+ * in USER MODE for talking to a standalone RNGA/RNGC device driver.
+ *
+ * It contains the fsl_shw_get_random() and fsl_shw_add_entropy() functions.
+ *
+ * These routines will build a request block and pass it to the SHW driver.
+ */
+
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/fcntl.h>
+#include <sys/ioctl.h>
+#include <signal.h>
+
+#ifdef FSL_DEBUG
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#endif				/* FSL_DEBUG */
+
+#include "shw_driver.h"
+
+extern fsl_shw_return_t validate_uco(fsl_shw_uco_t * uco);
+
+#if defined(FSL_HAVE_RNGA) || defined(FSL_HAVE_RNGB) || defined(FSL_HAVE_RNGC)
+
+/* REQ-S2LRD-PINTFC-API-BASIC-RNG-002 */
+fsl_shw_return_t fsl_shw_get_random(fsl_shw_uco_t * user_ctx,
+				    uint32_t length, uint8_t * data)
+{
+	fsl_shw_return_t ret = FSL_RETURN_ERROR_S;
+
+	/* perform a sanity check / update uco */
+	ret = validate_uco(user_ctx);
+	if (ret == FSL_RETURN_OK_S) {
+		struct get_random_req *req = malloc(sizeof(*req));
+
+		if (req == NULL) {
+			ret = FSL_RETURN_NO_RESOURCE_S;
+		} else {
+
+			init_req(&req->hdr, user_ctx);
+			req->size = length;
+			req->random = data;
+
+			ret =
+			    send_req(SHW_USER_REQ_GET_RANDOM, &req->hdr,
+				     user_ctx);
+		}
+	}
+
+	return ret;
+}
+
+fsl_shw_return_t fsl_shw_add_entropy(fsl_shw_uco_t * user_ctx,
+				     uint32_t length, uint8_t * data)
+{
+	fsl_shw_return_t ret = FSL_RETURN_ERROR_S;
+
+	/* perform a sanity check on the uco */
+	ret = validate_uco(user_ctx);
+	if (ret == FSL_RETURN_OK_S) {
+		struct add_entropy_req *req = malloc(sizeof(*req));
+
+		if (req == NULL) {
+			ret = FSL_RETURN_NO_RESOURCE_S;
+		} else {
+			init_req(&req->hdr, user_ctx);
+			req->size = length;
+			req->entropy = data;
+
+			ret =
+			    send_req(SHW_USER_REQ_ADD_ENTROPY, &req->hdr,
+				     user_ctx);
+		}
+	}
+
+	return ret;
+}
+
+#else				/* no H/W RNG block */
+
+fsl_shw_return_t fsl_shw_get_random(fsl_shw_uco_t * user_ctx,
+				    uint32_t length, uint8_t * data)
+{
+
+	(void)user_ctx;
+	(void)length;
+	(void)data;
+
+	return FSL_RETURN_ERROR_S;
+}
+
+fsl_shw_return_t fsl_shw_add_entropy(fsl_shw_uco_t * user_ctx,
+				     uint32_t length, uint8_t * data)
+{
+
+	(void)user_ctx;
+	(void)length;
+	(void)data;
+
+	return FSL_RETURN_ERROR_S;
+}
+#endif