1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
/* mailbox.h */
#ifndef MAILBOX_H
#define MAILBOX_H
#include <linux/wait.h>
#include <linux/workqueue.h>
#include <linux/blkdev.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 request_queue *queue;
struct work_struct work;
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 */
|
