From 060f9c5954480b82f7e82782e8abe5026d73a317 Mon Sep 17 00:00:00 2001
From: areviu <areviu.info@gmail.com>
Date: Tue, 14 Nov 2017 20:06:06 +0000
Subject: [PATCH] added SAMA TRNG driver

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@11003 35acf78f-673a-0410-8e92-d51de3d6d3f4
---
 os/hal/ports/SAMA/LLD/TRNGv1/driver.mk       |  5 ++
 os/hal/ports/SAMA/LLD/TRNGv1/sama_trng_lld.c | 53 ++++++++++++++++++++
 os/hal/ports/SAMA/LLD/TRNGv1/sama_trng_lld.h | 36 +++++++++++++
 3 files changed, 94 insertions(+)
 create mode 100644 os/hal/ports/SAMA/LLD/TRNGv1/driver.mk
 create mode 100644 os/hal/ports/SAMA/LLD/TRNGv1/sama_trng_lld.c
 create mode 100644 os/hal/ports/SAMA/LLD/TRNGv1/sama_trng_lld.h

diff --git a/os/hal/ports/SAMA/LLD/TRNGv1/driver.mk b/os/hal/ports/SAMA/LLD/TRNGv1/driver.mk
new file mode 100644
index 000000000..92d59e051
--- /dev/null
+++ b/os/hal/ports/SAMA/LLD/TRNGv1/driver.mk
@@ -0,0 +1,5 @@
+PLATFORMSRC +=$(CHIBIOS)/os/hal/ports/SAMA/LLD/TRNGv1/sama_trng_lld.c
+			
+			
+			
+PLATFORMINC +=$(CHIBIOS)/os/hal/ports/SAMA/LLD/TRNGv1
\ No newline at end of file
diff --git a/os/hal/ports/SAMA/LLD/TRNGv1/sama_trng_lld.c b/os/hal/ports/SAMA/LLD/TRNGv1/sama_trng_lld.c
new file mode 100644
index 000000000..2c416b6ad
--- /dev/null
+++ b/os/hal/ports/SAMA/LLD/TRNGv1/sama_trng_lld.c
@@ -0,0 +1,53 @@
+/*
+    ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+#include "hal.h"
+#include "sama_trng_lld.h"
+
+
+void trng_lld_init(void) {
+   	  pmcEnableTRNG();
+}
+
+void trng_lld_start(void) {
+
+  TRNG->TRNG_CR = TRNG_CR_ENABLE | TRNG_CR_KEY_PASSWD;
+  //enable interrupt
+ // TRNG->TRNG_IER = TRNG_IER_DATRDY;
+
+
+}
+
+void trng_lld_getrandom(uint32_t * random) {
+
+	//generate a random every 84 clock cycles.
+  while (!(TRNG->TRNG_ISR & TRNG_ISR_DATRDY));
+
+  *random = TRNG->TRNG_ODATA;
+
+}
+
+void trng_lld_stop(void) {
+	//disable interrupt
+	//TRNG->TRNG_IDR = TRNG_IDR_DATRDY;
+	TRNG->TRNG_CR = TRNG_CR_KEY_PASSWD;
+	pmcDisableTRNG();
+}
+
+
+
+
+
+
diff --git a/os/hal/ports/SAMA/LLD/TRNGv1/sama_trng_lld.h b/os/hal/ports/SAMA/LLD/TRNGv1/sama_trng_lld.h
new file mode 100644
index 000000000..83dd36174
--- /dev/null
+++ b/os/hal/ports/SAMA/LLD/TRNGv1/sama_trng_lld.h
@@ -0,0 +1,36 @@
+/*
+    ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+#ifndef HAL_LLD_SAMA_TRNG_H_
+#define HAL_LLD_SAMA_TRNG_H_
+
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern void trng_lld_init(void);
+extern void trng_lld_start(void);
+extern void trng_lld_stop(void);
+extern void trng_lld_getrandom(uint32_t * random);
+
+#ifdef __cplusplus
+}
+#endif
+
+
+
+#endif /* HAL_LLD_SAMA_TRNG_H_ */