[net-next-2.6.git] / arch / arm / plat-omap / include / plat / mailbox.h

/* mailbox.h */

#ifndef MAILBOX_H
#define MAILBOX_H

#include <linux/wait.h>
#include <linux/workqueue.h>
#include <linux/interrupt.h>
#include <linux/kfifo.h>

typedef u32 mbox_msg_t;
struct omap_mbox;

typedef int __bitwise omap_mbox_irq_t;
#define IRQ_TX ((__force omap_mbox_irq_t) 1)
#define IRQ_RX ((__force omap_mbox_irq_t) 2)

typedef int __bitwise omap_mbox_type_t;
#define OMAP_MBOX_TYPE1 ((__force omap_mbox_type_t) 1)
#define OMAP_MBOX_TYPE2 ((__force omap_mbox_type_t) 2)

struct omap_mbox_ops {
	omap_mbox_type_t	type;
	int		(*startup)(struct omap_mbox *mbox);
	void		(*shutdown)(struct omap_mbox *mbox);
	/* fifo */
	mbox_msg_t	(*fifo_read)(struct omap_mbox *mbox);
	void		(*fifo_write)(struct omap_mbox *mbox, mbox_msg_t msg);
	int		(*fifo_empty)(struct omap_mbox *mbox);
	int		(*fifo_full)(struct omap_mbox *mbox);
	/* irq */
	void		(*enable_irq)(struct omap_mbox *mbox,
						omap_mbox_irq_t irq);
	void		(*disable_irq)(struct omap_mbox *mbox,
						omap_mbox_irq_t irq);
	void		(*ack_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq);
	int		(*is_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq);
	/* ctx */
	void		(*save_ctx)(struct omap_mbox *mbox);
	void		(*restore_ctx)(struct omap_mbox *mbox);
};

struct omap_mbox_queue {
	spinlock_t		lock;
	struct kfifo		fifo;
	struct work_struct	work;
	struct tasklet_struct	tasklet;
	int	(*callback)(void *);
	struct omap_mbox	*mbox;
};

struct omap_mbox {
	char			*name;
	unsigned int		irq;

	struct omap_mbox_queue	*txq, *rxq;

	struct omap_mbox_ops	*ops;

	mbox_msg_t		seq_snd, seq_rcv;

	struct device		*dev;

	struct omap_mbox	*next;
	void			*priv;

	void			(*err_notify)(void);
};

int omap_mbox_msg_send(struct omap_mbox *, mbox_msg_t msg);
void omap_mbox_init_seq(struct omap_mbox *);

struct omap_mbox *omap_mbox_get(const char *);
void omap_mbox_put(struct omap_mbox *);

int omap_mbox_register(struct device *parent, struct omap_mbox *);
int omap_mbox_unregister(struct omap_mbox *);

static inline void omap_mbox_save_ctx(struct omap_mbox *mbox)
{
	if (!mbox->ops->save_ctx) {
		dev_err(mbox->dev, "%s:\tno save\n", __func__);
		return;
	}

	mbox->ops->save_ctx(mbox);
}

static inline void omap_mbox_restore_ctx(struct omap_mbox *mbox)
{
	if (!mbox->ops->restore_ctx) {
		dev_err(mbox->dev, "%s:\tno restore\n", __func__);
		return;
	}

	mbox->ops->restore_ctx(mbox);
}

static inline void omap_mbox_enable_irq(struct omap_mbox *mbox,
					omap_mbox_irq_t irq)
{
	mbox->ops->enable_irq(mbox, irq);
}

static inline void omap_mbox_disable_irq(struct omap_mbox *mbox,
					 omap_mbox_irq_t irq)
{
	mbox->ops->disable_irq(mbox, irq);
}

#endif /* MAILBOX_H */
Commit	Line	Data
340a614a HD	1	/* mailbox.h */
	2
	3	#ifndef MAILBOX_H
	4	#define MAILBOX_H
	5
	6	#include <linux/wait.h>
	7	#include <linux/workqueue.h>
5ed8d32e	8	#include <linux/interrupt.h>
b5bebe41	9	#include <linux/kfifo.h>
340a614a HD	10
340a614a HD	11	typedef u32 mbox_msg_t;
340a614a HD	12	struct omap_mbox;
	13
	14	typedef int __bitwise omap_mbox_irq_t;
	15	#define IRQ_TX ((__force omap_mbox_irq_t) 1)
	16	#define IRQ_RX ((__force omap_mbox_irq_t) 2)
	17
	18	typedef int __bitwise omap_mbox_type_t;
	19	#define OMAP_MBOX_TYPE1 ((__force omap_mbox_type_t) 1)
	20	#define OMAP_MBOX_TYPE2 ((__force omap_mbox_type_t) 2)
	21
	22	struct omap_mbox_ops {
	23	omap_mbox_type_t type;
	24	int (startup)(struct omap_mbox mbox);
	25	void (shutdown)(struct omap_mbox mbox);
	26	/* fifo */
	27	mbox_msg_t (fifo_read)(struct omap_mbox mbox);
	28	void (fifo_write)(struct omap_mbox mbox, mbox_msg_t msg);
	29	int (fifo_empty)(struct omap_mbox mbox);
	30	int (fifo_full)(struct omap_mbox mbox);
	31	/* irq */
5ed8d32e S	32	void (enable_irq)(struct omap_mbox mbox,
	33	omap_mbox_irq_t irq);
	34	void (disable_irq)(struct omap_mbox mbox,
	35	omap_mbox_irq_t irq);
340a614a HD	36	void (ack_irq)(struct omap_mbox mbox, omap_mbox_irq_t irq);
340a614a HD	37	int (is_irq)(struct omap_mbox mbox, omap_mbox_irq_t irq);
c75ee752 HD	38	/* ctx */
	39	void (save_ctx)(struct omap_mbox mbox);
	40	void (restore_ctx)(struct omap_mbox mbox);
340a614a HD	41	};
	42
	43	struct omap_mbox_queue {
	44	spinlock_t lock;
b5bebe41	45	struct kfifo fifo;
340a614a	46	struct work_struct work;
5ed8d32e	47	struct tasklet_struct tasklet;
340a614a HD	48	int (callback)(void );
	49	struct omap_mbox *mbox;
	50	};
	51
	52	struct omap_mbox {
	53	char *name;
	54	unsigned int irq;
	55
	56	struct omap_mbox_queue txq, rxq;
	57
	58	struct omap_mbox_ops *ops;
	59
	60	mbox_msg_t seq_snd, seq_rcv;
	61
f48cca87	62	struct device *dev;
340a614a HD	63
	64	struct omap_mbox *next;
	65	void *priv;
	66
	67	void (*err_notify)(void);
	68	};
	69
b2b6362e	70	int omap_mbox_msg_send(struct omap_mbox *, mbox_msg_t msg);
340a614a HD	71	void omap_mbox_init_seq(struct omap_mbox *);
	72
	73	struct omap_mbox omap_mbox_get(const char );
	74	void omap_mbox_put(struct omap_mbox *);
	75
f48cca87	76	int omap_mbox_register(struct device parent, struct omap_mbox );
340a614a HD	77	int omap_mbox_unregister(struct omap_mbox *);
340a614a HD	78
c75ee752 HD	79	static inline void omap_mbox_save_ctx(struct omap_mbox *mbox)
	80	{
	81	if (!mbox->ops->save_ctx) {
	82	dev_err(mbox->dev, "%s:\tno save\n", __func__);
	83	return;
	84	}
	85
	86	mbox->ops->save_ctx(mbox);
	87	}
	88
	89	static inline void omap_mbox_restore_ctx(struct omap_mbox *mbox)
	90	{
	91	if (!mbox->ops->restore_ctx) {
	92	dev_err(mbox->dev, "%s:\tno restore\n", __func__);
	93	return;
	94	}
	95
	96	mbox->ops->restore_ctx(mbox);
	97	}
	98
eb18858e HD	99	static inline void omap_mbox_enable_irq(struct omap_mbox *mbox,
	100	omap_mbox_irq_t irq)
	101	{
	102	mbox->ops->enable_irq(mbox, irq);
	103	}
	104
	105	static inline void omap_mbox_disable_irq(struct omap_mbox *mbox,
	106	omap_mbox_irq_t irq)
	107	{
	108	mbox->ops->disable_irq(mbox, irq);
	109	}
	110
340a614a	111	#endif /* MAILBOX_H */