1 files changed, 83 insertions, 0 deletions
diff --git a/include/linux/vf610_sema4.h b/include/linux/vf610_sema4.h
new file mode 100644
index 000000000000..a57de2303e9a
--- /dev/null
+++ b/include/linux/vf610_sema4.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2016 Toradex AG.
+ *
+ * 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.
+ */
+
+#ifndef __LINUX_VF610_SEMA4_H__
+#define __LINUX_VF610_SEMA4_H__
+
+#define SEMA4_NUM_DEVICES	1
+#define SEMA4_NUM_GATES		16
+
+#define SEMA4_UNLOCK	0x00
+#define SEMA4_A5_LOCK	0x01
+#define SEMA4_GATE_MASK	0x03
+
+#define CORE_MUTEX_VALID	(('c'<<24)|('m'<<24)|('t'<<24)|'x')
+
+/*
+ * The enumerates
+ */
+enum {
+	/* sema4 registers offset */
+	SEMA4_CP0INE	= 0x42,
+	SEMA4_CP1INE	= 0x4A,
+	SEMA4_CP0NTF	= 0x82,
+	SEMA4_CP1NTF	= 0x8A,
+};
+
+static const unsigned int idx_sema4[SEMA4_NUM_GATES] = {
+	1 << 15, 1 << 14, 1 << 13, 1 << 12,
+	1 << 11, 1 << 10, 1 << 9, 1 << 8,
+	1 << 7, 1 << 6, 1 << 5, 1 << 4,
+	1 << 3, 1 << 2, 1 << 1, 1 << 0,
+};
+
+struct vf610_sema4_mutex {
+	u32			valid;
+	u32			gate_num;
+	unsigned char		gate_val;
+	wait_queue_head_t       wait_q;
+};
+
+struct vf610_sema4_mutex_device {
+	struct device		*dev;
+	u16			cpntf_val;
+	u16			cpine_val;
+	void __iomem		*ioaddr;	/* Mapped address */
+	spinlock_t		lock;		/* Mutex */
+	int			irq;
+
+	u16			alloced;
+	struct vf610_sema4_mutex	*mutex_ptr[SEMA4_NUM_GATES];
+};
+
+struct vf610_sema4_mutex *
+	vf610_sema4_mutex_create(u32 dev_num, u32 mutex_num);
+#ifdef CONFIG_VF610_SEMA4
+int vf610_sema4_mutex_destroy(struct vf610_sema4_mutex *mutex_ptr);
+int vf610_sema4_mutex_trylock(struct vf610_sema4_mutex *mutex_ptr);
+int vf610_sema4_mutex_lock(struct vf610_sema4_mutex *mutex_ptr);
+int vf610_sema4_mutex_unlock(struct vf610_sema4_mutex *mutex_ptr);
+#else
+static inline int vf610_sema4_mutex_destroy(struct vf610_sema4_mutex *mutex_ptr)
+{
+	return 0;
+}
+static inline int vf610_sema4_mutex_trylock(struct vf610_sema4_mutex *mutex_ptr)
+{
+	return 0;
+}
+static inline int vf610_sema4_mutex_lock(struct vf610_sema4_mutex *mutex_ptr)
+{
+	return 0;
+}
+static inline int vf610_sema4_mutex_unlock(struct vf610_sema4_mutex *mutex_ptr)
+{
+	return 0;
+}
+#endif
+#endif /* __LINUX_VF610_SEMA4_H__ */