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
|
#ifndef __QCOM_SMD_H__
#define __QCOM_SMD_H__
#include <linux/device.h>
#include <linux/mod_devicetable.h>
struct qcom_smd;
struct qcom_smd_lookup;
/*
* SMD channel states.
*/
enum smd_channel_state {
SMD_CHANNEL_CLOSED,
SMD_CHANNEL_OPENING,
SMD_CHANNEL_OPENED,
SMD_CHANNEL_FLUSHING,
SMD_CHANNEL_CLOSING,
SMD_CHANNEL_RESET,
SMD_CHANNEL_RESET_OPENING
};
struct qcom_smd_channel {
struct qcom_smd_edge *edge;
struct qcom_smd_device *qsdev;
char *name;
enum smd_channel_state state;
enum smd_channel_state remote_state;
struct smd_channel_info *tx_info;
struct smd_channel_info *rx_info;
struct smd_channel_info_word *tx_info_word;
struct smd_channel_info_word *rx_info_word;
struct mutex tx_lock;
wait_queue_head_t fblockread_event;
void *tx_fifo;
void *rx_fifo;
int fifo_size;
void *bounce_buffer;
int (*cb)(struct qcom_smd_device *, const void *, size_t);
spinlock_t recv_lock;
int pkt_size;
struct list_head list;
};
/**
* struct qcom_smd_device - smd device struct
* @dev: the device struct
* @channel: handle to the smd channel for this device
*/
struct qcom_smd_device {
struct device dev;
struct qcom_smd_channel *channel;
};
/**
* struct qcom_smd_driver - smd driver struct
* @driver: underlying device driver
* @probe: invoked when the smd channel is found
* @remove: invoked when the smd channel is closed
* @callback: invoked when an inbound message is received on the channel,
* should return 0 on success or -EBUSY if the data cannot be
* consumed at this time
*/
struct qcom_smd_driver {
struct device_driver driver;
int (*probe)(struct qcom_smd_device *dev);
void (*remove)(struct qcom_smd_device *dev);
int (*callback)(struct qcom_smd_device *, const void *, size_t);
};
int qcom_smd_driver_register(struct qcom_smd_driver *drv);
void qcom_smd_driver_unregister(struct qcom_smd_driver *drv);
#define module_qcom_smd_driver(__smd_driver) \
module_driver(__smd_driver, qcom_smd_driver_register, \
qcom_smd_driver_unregister)
int qcom_smd_send(struct qcom_smd_channel *channel, const void *data, int len);
#endif
|