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#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_close_channel(struct qcom_smd_channel *channel);
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);
struct qcom_smd_edge *qcom_smd_register_edge(struct device *parent,
struct device_node *node);
int qcom_smd_unregister_edge(struct qcom_smd_edge *edge);
#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;
}
static inline void qcom_smd_close_channel(struct qcom_smd_channel *channel)
{
/* This shouldn't be possible */
WARN_ON(1);
}
static inline void *qcom_smd_get_drvdata(struct qcom_smd_channel *channel)
{
/* This shouldn't be possible */
WARN_ON(1);
return NULL;
}
static inline 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;
}
static inline struct qcom_smd_edge *
qcom_smd_register_edge(struct device *parent,
struct device_node *node)
{
return ERR_PTR(-ENXIO);
}
static inline int qcom_smd_unregister_edge(struct qcom_smd_edge *edge)
{
/* 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
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