stm32:rng: f4 rng peripheral is common with at least f2

Pull it up as common code immediately. Rename to v1, extract to common
with a doxygen marker stubs, add to F2 makefiles.

1 files changed, 86 insertions, 0 deletions

diff --git a/include/libopencm3/stm32/common/rng_common_v1.h b/include/libopencm3/stm32/common/rng_common_v1.h
new file mode 100644
index 00000000..e0c26a81
--- /dev/null
+++ b/include/libopencm3/stm32/common/rng_common_v1.h
@@ -0,0 +1,86 @@
+/** @addtogroup rng_file
+ */
+/*
+ * This file is part of the libopencm3 project.
+ *
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* THIS FILE SHOULD NOT BE INCLUDED DIRECTLY, BUT ONLY VIA RNG.H
+The order of header inclusion is important. rng.h includes the device
+specific memorymap.h header before including this header file.*/
+
+/** @cond */
+#ifdef LIBOPENCM3_RNG_H
+/** @endcond */
+#ifndef LIBOPENCM3_RNG_V1_H
+#define LIBOPENCM3_RNG_V1_H
+
+/**@{*/
+
+/* --- Random number generator registers ----------------------------------- */
+
+/* Control register */
+#define RNG_CR			MMIO32(RNG_BASE + 0x00)
+
+/* Status register */
+#define RNG_SR			MMIO32(RNG_BASE + 0x04)
+
+/* Data register */
+#define RNG_DR			MMIO32(RNG_BASE + 0x08)
+
+/* --- RNG_CR values ------------------------------------------------------- */
+
+/* RNG ENABLE */
+#define RNG_CR_RNGEN		(1 << 2)
+
+/* RNG interrupt enable */
+#define RNG_CR_IE			(1 << 3)
+
+/* --- RNG_SR values ------------------------------------------------------- */
+
+/* Data ready */
+#define RNG_SR_DRDY		(1 << 0)
+
+/* Clock error current status */
+#define RNG_SR_CECS		(1 << 1)
+
+/* Seed error current status */
+#define RNG_SR_SECS		(1 << 2)
+
+/* Clock error interrupt status */
+#define RNG_SR_CEIS		(1 << 5)
+
+/* Seed error interrupt status */
+#define RNG_SR_SEIS		(1 << 6)
+
+/* --- Function prototypes ------------------------------------------------- */
+
+BEGIN_DECLS
+
+void rng_enable(void);
+void rng_disable(void);
+
+END_DECLS
+
+/**@}*/
+
+#endif
+/** @cond */
+#else
+#warning "rng_common_v1.h should not be included explicitly, only via rng.h"
+#endif
+/** @endcond */
+