[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / gadget / uvc_queue.h

#ifndef _UVC_QUEUE_H_
#define _UVC_QUEUE_H_

#ifdef __KERNEL__

#include <linux/kernel.h>
#include <linux/poll.h>
#include <linux/videodev2.h>
#include <media/videobuf2-core.h>

/* Maximum frame size in bytes, for sanity checking. */
#define UVC_MAX_FRAME_SIZE	(16*1024*1024)
/* Maximum number of video buffers. */
#define UVC_MAX_VIDEO_BUFFERS	32

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

enum uvc_buffer_state {
	UVC_BUF_STATE_IDLE	= 0,
	UVC_BUF_STATE_QUEUED	= 1,
	UVC_BUF_STATE_ACTIVE	= 2,
	UVC_BUF_STATE_DONE	= 3,
	UVC_BUF_STATE_ERROR	= 4,
};

struct uvc_buffer {
	struct vb2_buffer buf;
	struct list_head queue;

	enum uvc_buffer_state state;
	void *mem;
	unsigned int length;
	unsigned int bytesused;
};

#define UVC_QUEUE_DISCONNECTED		(1 << 0)
#define UVC_QUEUE_DROP_INCOMPLETE	(1 << 1)
#define UVC_QUEUE_PAUSED		(1 << 2)

struct uvc_video_queue {
	struct vb2_queue queue;
	struct mutex mutex;	/* Protects queue */

	unsigned int flags;
	__u32 sequence;

	unsigned int buf_used;

	spinlock_t irqlock;	/* Protects flags and irqqueue */
	struct list_head irqqueue;
};

static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
{
	return vb2_is_streaming(&queue->queue);
}

#endif /* __KERNEL__ */

#endif /* _UVC_QUEUE_H_ */
Commit	Line	Data
	1	#ifndef _UVC_QUEUE_H_
	2	#define _UVC_QUEUE_H_
	3
	4	#ifdef __KERNEL__
	5
	6	#include <linux/kernel.h>
	7	#include <linux/poll.h>
	8	#include <linux/videodev2.h>
	9	#include <media/videobuf2-core.h>
	10
	11	/* Maximum frame size in bytes, for sanity checking. */
	12	#define UVC_MAX_FRAME_SIZE (1610241024)
	13	/* Maximum number of video buffers. */
	14	#define UVC_MAX_VIDEO_BUFFERS 32
	15
	16	/* ------------------------------------------------------------------------
	17	* Structures.
	18	*/
	19
	20	enum uvc_buffer_state {
	21	UVC_BUF_STATE_IDLE = 0,
	22	UVC_BUF_STATE_QUEUED = 1,
	23	UVC_BUF_STATE_ACTIVE = 2,
	24	UVC_BUF_STATE_DONE = 3,
	25	UVC_BUF_STATE_ERROR = 4,
	26	};
	27
	28	struct uvc_buffer {
	29	struct vb2_buffer buf;
	30	struct list_head queue;
	31
	32	enum uvc_buffer_state state;
	33	void *mem;
	34	unsigned int length;
	35	unsigned int bytesused;
	36	};
	37
	38	#define UVC_QUEUE_DISCONNECTED (1 << 0)
	39	#define UVC_QUEUE_DROP_INCOMPLETE (1 << 1)
	40	#define UVC_QUEUE_PAUSED (1 << 2)
	41
	42	struct uvc_video_queue {
	43	struct vb2_queue queue;
	44	struct mutex mutex; /* Protects queue */
	45
	46	unsigned int flags;
	47	__u32 sequence;
	48
	49	unsigned int buf_used;
	50
	51	spinlock_t irqlock; /* Protects flags and irqqueue */
	52	struct list_head irqqueue;
	53	};
	54
	55	static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
	56	{
	57	return vb2_is_streaming(&queue->queue);
	58	}
	59
	60	#endif /* __KERNEL__ */
	61
	62	#endif /* _UVC_QUEUE_H_ */
	63