115 lines
2.7 KiB
C
115 lines
2.7 KiB
C
#ifndef __QCOM_SMD_H__
|
|
#define __QCOM_SMD_H__
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/mod_devicetable.h>
|
|
|
|
struct qcom_smd;
|
|
struct qcom_smd_channel;
|
|
struct qcom_smd_lookup;
|
|
|
|
/**
|
|
* struct qcom_smd_id - struct used for matching a smd device
|
|
* @name: name of the channel
|
|
*/
|
|
struct qcom_smd_id {
|
|
char name[20];
|
|
};
|
|
|
|
/**
|
|
* 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;
|
|
};
|
|
|
|
typedef int (*qcom_smd_cb_t)(struct qcom_smd_channel *, const void *, size_t);
|
|
|
|
/**
|
|
* struct qcom_smd_driver - smd driver struct
|
|
* @driver: underlying device driver
|
|
* @smd_match_table: static channel match table
|
|
* @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;
|
|
const struct qcom_smd_id *smd_match_table;
|
|
|
|
int (*probe)(struct qcom_smd_device *dev);
|
|
void (*remove)(struct qcom_smd_device *dev);
|
|
qcom_smd_cb_t callback;
|
|
};
|
|
|
|
#if IS_ENABLED(CONFIG_QCOM_SMD)
|
|
|
|
int qcom_smd_driver_register(struct qcom_smd_driver *drv);
|
|
void qcom_smd_driver_unregister(struct qcom_smd_driver *drv);
|
|
|
|
struct qcom_smd_channel *qcom_smd_open_channel(struct qcom_smd_channel *channel,
|
|
const char *name,
|
|
qcom_smd_cb_t cb);
|
|
void *qcom_smd_get_drvdata(struct qcom_smd_channel *channel);
|
|
void qcom_smd_set_drvdata(struct qcom_smd_channel *channel, void *data);
|
|
int qcom_smd_send(struct qcom_smd_channel *channel, const void *data, int len);
|
|
|
|
|
|
#else
|
|
|
|
static inline int qcom_smd_driver_register(struct qcom_smd_driver *drv)
|
|
{
|
|
return -ENXIO;
|
|
}
|
|
|
|
static inline void qcom_smd_driver_unregister(struct qcom_smd_driver *drv)
|
|
{
|
|
/* This shouldn't be possible */
|
|
WARN_ON(1);
|
|
}
|
|
|
|
static inline struct qcom_smd_channel *
|
|
qcom_smd_open_channel(struct qcom_smd_channel *channel,
|
|
const char *name,
|
|
qcom_smd_cb_t cb)
|
|
{
|
|
/* This shouldn't be possible */
|
|
WARN_ON(1);
|
|
return NULL;
|
|
}
|
|
|
|
void *qcom_smd_get_drvdata(struct qcom_smd_channel *channel)
|
|
{
|
|
/* This shouldn't be possible */
|
|
WARN_ON(1);
|
|
return NULL;
|
|
}
|
|
|
|
void qcom_smd_set_drvdata(struct qcom_smd_channel *channel, void *data)
|
|
{
|
|
/* This shouldn't be possible */
|
|
WARN_ON(1);
|
|
}
|
|
|
|
static inline int qcom_smd_send(struct qcom_smd_channel *channel,
|
|
const void *data, int len)
|
|
{
|
|
/* This shouldn't be possible */
|
|
WARN_ON(1);
|
|
return -ENXIO;
|
|
}
|
|
|
|
#endif
|
|
|
|
#define module_qcom_smd_driver(__smd_driver) \
|
|
module_driver(__smd_driver, qcom_smd_driver_register, \
|
|
qcom_smd_driver_unregister)
|
|
|
|
|
|
#endif
|