1 #ifndef __QCOM_SMD_H__
2 #define __QCOM_SMD_H__
3 
4 #include <linux/device.h>
5 #include <linux/mod_devicetable.h>
6 
7 struct qcom_smd;
8 struct qcom_smd_channel;
9 struct qcom_smd_lookup;
10 
11 /**
12  * struct qcom_smd_id - struct used for matching a smd device
13  * @name:	name of the channel
14  */
15 struct qcom_smd_id {
16 	char name[20];
17 };
18 
19 /**
20  * struct qcom_smd_device - smd device struct
21  * @dev:	the device struct
22  * @channel:	handle to the smd channel for this device
23  */
24 struct qcom_smd_device {
25 	struct device dev;
26 	struct qcom_smd_channel *channel;
27 };
28 
29 /**
30  * struct qcom_smd_driver - smd driver struct
31  * @driver:	underlying device driver
32  * @smd_match_table: static channel match table
33  * @probe:	invoked when the smd channel is found
34  * @remove:	invoked when the smd channel is closed
35  * @callback:	invoked when an inbound message is received on the channel,
36  *		should return 0 on success or -EBUSY if the data cannot be
37  *		consumed at this time
38  */
39 struct qcom_smd_driver {
40 	struct device_driver driver;
41 	const struct qcom_smd_id *smd_match_table;
42 
43 	int (*probe)(struct qcom_smd_device *dev);
44 	void (*remove)(struct qcom_smd_device *dev);
45 	int (*callback)(struct qcom_smd_device *, const void *, size_t);
46 };
47 
48 int qcom_smd_driver_register(struct qcom_smd_driver *drv);
49 void qcom_smd_driver_unregister(struct qcom_smd_driver *drv);
50 
51 #define module_qcom_smd_driver(__smd_driver) \
52 	module_driver(__smd_driver, qcom_smd_driver_register, \
53 		      qcom_smd_driver_unregister)
54 
55 int qcom_smd_send(struct qcom_smd_channel *channel, const void *data, int len);
56 
57 #endif
58