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/*
* 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__ */
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