1 files changed, 97 insertions, 0 deletions
diff --git a/security/smc/omap4/scxlnx_comm_mshield.c b/security/smc/omap4/scxlnx_comm_mshield.c
new file mode 100644
index 0000000..ccd2098
--- /dev/null
+++ b/security/smc/omap4/scxlnx_comm_mshield.c
@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2010 Trusted Logic S.A.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <asm/div64.h>
+#include <asm/system.h>
+#include <asm/cputype.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/page-flags.h>
+#include <linux/pagemap.h>
+#include <linux/vmalloc.h>
+#include <linux/version.h>
+#include <linux/jiffies.h>
+#include <linux/dma-mapping.h>
+#include <linux/cpu.h>
+
+#include <asm/cacheflush.h>
+
+#include <clockdomain.h>
+
+#include "scxlnx_defs.h"
+
+#ifdef CONFIG_HAS_WAKELOCK
+static struct wake_lock g_tf_wake_lock;
+static atomic_t tf_wake_lock_count = ATOMIC_INIT(0);
+#endif
+
+static struct clockdomain *smc_l4_sec_clkdm;
+static atomic_t smc_l4_sec_clkdm_use_count = ATOMIC_INIT(0);
+
+static int __init tf_early_init(void)
+{
+	smc_l4_sec_clkdm = clkdm_lookup("l4_secure_clkdm");
+	if (smc_l4_sec_clkdm == NULL)
+		return -EFAULT;
+
+#ifdef CONFIG_HAS_WAKELOCK
+	wake_lock_init(&g_tf_wake_lock, WAKE_LOCK_SUSPEND,
+		SCXLNX_DEVICE_BASE_NAME);
+#endif
+
+	return 0;
+}
+early_initcall(tf_early_init);
+
+/*--------------------------------------------------------------------------
+ * L4 SEC Clock domain handling
+ *-------------------------------------------------------------------------- */
+
+void tf_l4sec_clkdm_wakeup(bool use_spin_lock, bool wakelock)
+{
+	if (use_spin_lock)
+		spin_lock(&SCXLNXGetDevice()->sm.lock);
+#ifdef CONFIG_HAS_WAKELOCK
+	if (wakelock) {
+		atomic_inc(&tf_wake_lock_count);
+		wake_lock(&g_tf_wake_lock);
+	}
+#endif
+	atomic_inc(&smc_l4_sec_clkdm_use_count);
+	clkdm_wakeup(smc_l4_sec_clkdm);
+	if (use_spin_lock)
+		spin_unlock(&SCXLNXGetDevice()->sm.lock);
+}
+
+void tf_l4sec_clkdm_allow_idle(bool use_spin_lock, bool wakeunlock)
+{
+	if (use_spin_lock)
+		spin_lock(&SCXLNXGetDevice()->sm.lock);
+	if (atomic_dec_return(&smc_l4_sec_clkdm_use_count) == 0)
+		clkdm_allow_idle(smc_l4_sec_clkdm);
+#ifdef CONFIG_HAS_WAKELOCK
+	if (wakeunlock)
+		if (atomic_dec_return(&tf_wake_lock_count) == 0)
+			wake_unlock(&g_tf_wake_lock);
+#endif
+	if (use_spin_lock)
+		spin_unlock(&SCXLNXGetDevice()->sm.lock);
+}
+