1 files changed, 50 insertions, 0 deletions
diff --git a/target/linux/ubicom32/files/arch/ubicom32/crypto/crypto_ubicom32.c b/target/linux/ubicom32/files/arch/ubicom32/crypto/crypto_ubicom32.c
new file mode 100644
index 000000000..237ebbd9f
--- /dev/null
+++ b/target/linux/ubicom32/files/arch/ubicom32/crypto/crypto_ubicom32.c
@@ -0,0 +1,50 @@
+/*
+ * arch/ubicom32/crypto/crypto_ubicom32.c
+ *   Generic code to support ubicom32 hardware crypto accelerator
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * The Ubicom32 Linux Kernel Port 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, either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Ubicom32 Linux Kernel Port 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ *
+ * Ubicom32 implementation derived from (with many thanks):
+ *   arch/m68knommu
+ *   arch/blackfin
+ *   arch/parisc
+ */
+#include "crypto_ubicom32.h"
+
+spinlock_t crypto_ubicom32_lock;
+bool crypto_ubicom32_inited = false;
+volatile bool crypto_ubicom32_on = false;
+volatile unsigned long crypto_ubicom32_last_use;
+
+struct timer_list crypto_ubicom32_ps_timer;
+void crypto_ubicom32_ps_check(unsigned long data)
+{
+	unsigned long idle_time = msecs_to_jiffies(HW_CRYPTO_PS_MAX_IDLE_MS);
+
+	BUG_ON(!crypto_ubicom32_on);
+
+	if (((jiffies - crypto_ubicom32_last_use) > idle_time) && spin_trylock_bh(&crypto_ubicom32_lock)) {
+                hw_crypto_turn_off();
+                spin_unlock_bh(&crypto_ubicom32_lock);
+		return;
+	}
+
+	/* keep monitoring */
+	hw_crypto_ps_start();
+}