Release 4.7 drivers/usb/gadget/function/uvc.h

/*
 *      uvc_gadget.h  --  USB Video Class Gadget driver
 *
 *      Copyright (C) 2009-2010
 *          Laurent Pinchart (laurent.pinchart@ideasonboard.com)
 *
 *      This program is free software; you can redistribute it and/or modify
 *      it under the terms of the GNU General Public License as published by
 *      the Free Software Foundation; either version 2 of the License, or
 *      (at your option) any later version.
 */

#ifndef _UVC_GADGET_H_

#define _UVC_GADGET_H_

#include <linux/ioctl.h>
#include <linux/types.h>
#include <linux/usb/ch9.h>


#define UVC_EVENT_FIRST			(V4L2_EVENT_PRIVATE_START + 0)

#define UVC_EVENT_CONNECT		(V4L2_EVENT_PRIVATE_START + 0)

#define UVC_EVENT_DISCONNECT		(V4L2_EVENT_PRIVATE_START + 1)

#define UVC_EVENT_STREAMON		(V4L2_EVENT_PRIVATE_START + 2)

#define UVC_EVENT_STREAMOFF		(V4L2_EVENT_PRIVATE_START + 3)

#define UVC_EVENT_SETUP			(V4L2_EVENT_PRIVATE_START + 4)

#define UVC_EVENT_DATA			(V4L2_EVENT_PRIVATE_START + 5)

#define UVC_EVENT_LAST			(V4L2_EVENT_PRIVATE_START + 5)


struct uvc_request_data
{
	
__s32 length;
	
__u8 data[60];
};


struct uvc_event
{
	union {
		
enum usb_device_speed speed;
		
struct usb_ctrlrequest req;
		
struct uvc_request_data data;
	};
};


#define UVCIOC_SEND_RESPONSE		_IOW('U', 1, struct uvc_request_data)


#define UVC_INTF_CONTROL		0

#define UVC_INTF_STREAMING		1

/* ------------------------------------------------------------------------
 * Debugging, printing and logging
 */

#ifdef __KERNEL__

#include <linux/usb.h>	/* For usb_endpoint_* */
#include <linux/usb/composite.h>
#include <linux/usb/gadget.h>
#include <linux/videodev2.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-device.h>

#include "uvc_queue.h"


#define UVC_TRACE_PROBE				(1 << 0)

#define UVC_TRACE_DESCR				(1 << 1)

#define UVC_TRACE_CONTROL			(1 << 2)

#define UVC_TRACE_FORMAT			(1 << 3)

#define UVC_TRACE_CAPTURE			(1 << 4)

#define UVC_TRACE_CALLS				(1 << 5)

#define UVC_TRACE_IOCTL				(1 << 6)

#define UVC_TRACE_FRAME				(1 << 7)

#define UVC_TRACE_SUSPEND			(1 << 8)

#define UVC_TRACE_STATUS			(1 << 9)


#define UVC_WARN_MINMAX				0

#define UVC_WARN_PROBE_DEF			1

extern unsigned int uvc_gadget_trace_param;


#define uvc_trace(flag, msg...) \
	do { \
                if (uvc_gadget_trace_param & flag) \
                        printk(KERN_DEBUG "uvcvideo: " msg); \
        } while (0)


#define uvc_warn_once(dev, warn, msg...) \
	do { \
                if (!test_and_set_bit(warn, &dev->warnings)) \
                        printk(KERN_INFO "uvcvideo: " msg); \
        } while (0)


#define uvc_printk(level, msg...) \
	printk(level "uvcvideo: " msg)

/* ------------------------------------------------------------------------
 * Driver specific constants
 */


#define UVC_NUM_REQUESTS			4

#define UVC_MAX_REQUEST_SIZE			64

#define UVC_MAX_EVENTS				4

/* ------------------------------------------------------------------------
 * Structures
 */


struct uvc_video
{
	
struct usb_ep *ep;

	/* Frame parameters */
	
u8 bpp;
	
u32 fcc;
	
unsigned int width;
	
unsigned int height;
	
unsigned int imagesize;
	
struct mutex mutex;	/* protects frame parameters */

	/* Requests */
	
unsigned int req_size;
	
struct usb_request *req[UVC_NUM_REQUESTS];
	
__u8 *req_buffer[UVC_NUM_REQUESTS];
	
struct list_head req_free;
	
spinlock_t req_lock;

	
void (*encode) (struct usb_request *req, struct uvc_video *video,
			struct uvc_buffer *buf);

	/* Context data used by the completion handler */
	
__u32 payload_size;
	
__u32 max_payload_size;

	
struct uvc_video_queue queue;
	
unsigned int fid;
};


enum uvc_state
{
	
UVC_STATE_DISCONNECTED,
	
UVC_STATE_CONNECTED,
	
UVC_STATE_STREAMING,
};


struct uvc_device
{
	
struct video_device vdev;
	
struct v4l2_device v4l2_dev;
	
enum uvc_state state;
	
struct usb_function func;
	
struct uvc_video video;

	/* Descriptors */
	struct {
		
const struct uvc_descriptor_header * const *fs_control;
		
const struct uvc_descriptor_header * const *ss_control;
		
const struct uvc_descriptor_header * const *fs_streaming;
		
const struct uvc_descriptor_header * const *hs_streaming;
		
const struct uvc_descriptor_header * const *ss_streaming;
	} 
desc;

	
unsigned int control_intf;
	
struct usb_ep *control_ep;
	
struct usb_request *control_req;
	
void *control_buf;

	
unsigned int streaming_intf;

	/* Events */
	
unsigned int event_length;
	
unsigned int event_setup_out : 1;
};



static inline struct uvc_device *to_uvc(struct usb_function *f)
{
	return container_of(f, struct uvc_device, func);
}

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struct uvc_file_handle
{
	
struct v4l2_fh vfh;
	
struct uvc_video *device;
};


#define to_uvc_file_handle(handle) \
	container_of(handle, struct uvc_file_handle, vfh)

/* ------------------------------------------------------------------------
 * Functions
 */

extern void uvc_function_setup_continue(struct uvc_device *uvc);
extern void uvc_endpoint_stream(struct uvc_device *dev);

extern void uvc_function_connect(struct uvc_device *uvc);
extern void uvc_function_disconnect(struct uvc_device *uvc);

#endif /* __KERNEL__ */

#endif /* _UVC_GADGET_H_ */

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Directory: drivers/usb/gadget/function

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