Release 4.7 include/linux/soc/qcom/smd.h

#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;
}

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static inline void qcom_smd_driver_unregister(struct qcom_smd_driver *drv)
{
	/* This shouldn't be possible */
	WARN_ON(1);
}

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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;
}

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void *qcom_smd_get_drvdata(struct qcom_smd_channel *channel)
{
	/* This shouldn't be possible */
	WARN_ON(1);
	return NULL;
}

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void qcom_smd_set_drvdata(struct qcom_smd_channel *channel, void *data)
{
	/* This shouldn't be possible */
	WARN_ON(1);
}

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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;
}

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#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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Directory: include/linux/soc/qcom

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