nanohub_exports.h

#ifndef _NANOHUB_EXPORTS_H_
#define _NANOHUB_EXPORTS_H_

// Exported symbols available to other kernel modules.
//
// Please add the exported symvers to your module's Makefile:
// all: (MAKE) -C $(KERNEL_SRC) M=$(M) modules ...
//      KBUILD_EXTRA_SYMBOLS="$(OUT_DIR)/../exynos-google-cw-extra/drivers/sensorhub/nanohub/Module.symvers"
//
// Your module will have a module dependency on nanohub.

#define MAX_MESSAGE_SIZE 255
#define NANOHUB_AUDIO_CHANNEL_ID 16
#define NANOHUB_DISPLAY_CHANNEL_ID 17
#define NANOHUB_RENDER_CHANNEL_ID 18
#define NANOHUB_DEBUG_LOG_CHANNEL_ID 19
#define NANOHUB_METRICS_CHANNEL_ID 20
#define NANOHUB_CONSOLE_CHANNEL_ID 21
#define NANOHUB_RPC0_CHANNEL_ID 22
#define NANOHUB_RPC1_CHANNEL_ID 23
#define NANOHUB_BRIGHTNESS_CHANNEL_ID 24

/**
 * Sends a message over a nanohub channel.
 *
 * Remote delivery and dispatch of the entire buffer is guaranteed on successful
 * return.
 *
 * Returns the size of the buffer transferred, or an error if < 0.
 */
extern ssize_t nanohub_send_message(int channel_id, const char *buffer,
                                    size_t length);

/**
 * Register a message listener of a nanohub channel.
 *
 * on_message_received callback will be invoked when nanohub receives a new message
 * from MCU on that channel.
 */
extern void nanohub_register_listener(
	int channel_id,
	void (*on_message_received)(const char *buffer, size_t length));

/**
 * Unregister the message listener of a nanohub channel.
 */
extern void nanohub_unregister_listener(int channel_id);

#endif /* _NANOHUB_EXPORTS_H_ */