1/* mailbox.h */
2
3#ifndef MAILBOX_H
4#define MAILBOX_H
5
6#include <linux/wait.h>
7#include <linux/workqueue.h>
8#include <linux/blkdev.h>
9
10typedef u32 mbox_msg_t;
11typedef void (mbox_receiver_t)(mbox_msg_t msg);
12struct omap_mbox;
13
14typedef 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
18typedef 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
22struct 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 */
32	void		(*enable_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq);
33	void		(*disable_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq);
34	void		(*ack_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq);
35	int		(*is_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq);
36};
37
38struct omap_mbox_queue {
39	spinlock_t		lock;
40	request_queue_t		*queue;
41	struct work_struct	work;
42	int	(*callback)(void *);
43	struct omap_mbox	*mbox;
44};
45
46struct omap_mbox {
47	char			*name;
48	unsigned int		irq;
49
50	struct omap_mbox_queue	*txq, *rxq;
51
52	struct omap_mbox_ops	*ops;
53
54	mbox_msg_t		seq_snd, seq_rcv;
55
56	struct device		dev;
57
58	struct omap_mbox	*next;
59	void			*priv;
60
61	void			(*err_notify)(void);
62};
63
64int omap_mbox_msg_send(struct omap_mbox *, mbox_msg_t msg, void *);
65void omap_mbox_init_seq(struct omap_mbox *);
66
67struct omap_mbox *omap_mbox_get(const char *);
68void omap_mbox_put(struct omap_mbox *);
69
70int omap_mbox_register(struct omap_mbox *);
71int omap_mbox_unregister(struct omap_mbox *);
72
73#endif /* MAILBOX_H */
74