Initial import

1 files changed, 746 insertions, 0 deletions

diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
new file mode 100644
index 000000000..1b594c203
--- /dev/null
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -0,0 +1,746 @@
+#ifndef _USB_VIDEO_H_
+#define _USB_VIDEO_H_
+
+#ifndef __KERNEL__
+#error "The uvcvideo.h header is deprecated, use linux/uvcvideo.h instead."
+#endif /* __KERNEL__ */
+
+#include <linux/kernel.h>
+#include <linux/poll.h>
+#include <linux/usb.h>
+#include <linux/usb/video.h>
+#include <linux/uvcvideo.h>
+#include <linux/videodev2.h>
+#include <media/media-device.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-fh.h>
+#include <media/videobuf2-core.h>
+
+/* --------------------------------------------------------------------------
+ * UVC constants
+ */
+
+#define UVC_TERM_INPUT			0x0000
+#define UVC_TERM_OUTPUT			0x8000
+#define UVC_TERM_DIRECTION(term)	((term)->type & 0x8000)
+
+#define UVC_ENTITY_TYPE(entity)		((entity)->type & 0x7fff)
+#define UVC_ENTITY_IS_UNIT(entity)	(((entity)->type & 0xff00) == 0)
+#define UVC_ENTITY_IS_TERM(entity)	(((entity)->type & 0xff00) != 0)
+#define UVC_ENTITY_IS_ITERM(entity) \
+	(UVC_ENTITY_IS_TERM(entity) && \
+	((entity)->type & 0x8000) == UVC_TERM_INPUT)
+#define UVC_ENTITY_IS_OTERM(entity) \
+	(UVC_ENTITY_IS_TERM(entity) && \
+	((entity)->type & 0x8000) == UVC_TERM_OUTPUT)
+
+
+/* ------------------------------------------------------------------------
+ * GUIDs
+ */
+#define UVC_GUID_UVC_CAMERA \
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
+	 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}
+#define UVC_GUID_UVC_OUTPUT \
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
+	 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}
+#define UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT \
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
+	 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03}
+#define UVC_GUID_UVC_PROCESSING \
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
+	 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01}
+#define UVC_GUID_UVC_SELECTOR \
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
+	 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02}
+
+#define UVC_GUID_FORMAT_MJPEG \
+	{ 'M',  'J',  'P',  'G', 0x00, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+#define UVC_GUID_FORMAT_YUY2 \
+	{ 'Y',  'U',  'Y',  '2', 0x00, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+#define UVC_GUID_FORMAT_YUY2_ISIGHT \
+	{ 'Y',  'U',  'Y',  '2', 0x00, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0x00, 0x00, 0x38, 0x9b, 0x71}
+#define UVC_GUID_FORMAT_NV12 \
+	{ 'N',  'V',  '1',  '2', 0x00, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+#define UVC_GUID_FORMAT_YV12 \
+	{ 'Y',  'V',  '1',  '2', 0x00, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+#define UVC_GUID_FORMAT_I420 \
+	{ 'I',  '4',  '2',  '0', 0x00, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+#define UVC_GUID_FORMAT_UYVY \
+	{ 'U',  'Y',  'V',  'Y', 0x00, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+#define UVC_GUID_FORMAT_Y800 \
+	{ 'Y',  '8',  '0',  '0', 0x00, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+#define UVC_GUID_FORMAT_Y8 \
+	{ 'Y',  '8',  ' ',  ' ', 0x00, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+#define UVC_GUID_FORMAT_Y10 \
+	{ 'Y',  '1',  '0',  ' ', 0x00, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+#define UVC_GUID_FORMAT_Y12 \
+	{ 'Y',  '1',  '2',  ' ', 0x00, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+#define UVC_GUID_FORMAT_Y16 \
+	{ 'Y',  '1',  '6',  ' ', 0x00, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+#define UVC_GUID_FORMAT_BY8 \
+	{ 'B',  'Y',  '8',  ' ', 0x00, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+#define UVC_GUID_FORMAT_BA81 \
+	{ 'B',  'A',  '8',  '1', 0x00, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+#define UVC_GUID_FORMAT_GBRG \
+	{ 'G',  'B',  'R',  'G', 0x00, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+#define UVC_GUID_FORMAT_GRBG \
+	{ 'G',  'R',  'B',  'G', 0x00, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+#define UVC_GUID_FORMAT_RGGB \
+	{ 'R',  'G',  'G',  'B', 0x00, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+#define UVC_GUID_FORMAT_RGBP \
+	{ 'R',  'G',  'B',  'P', 0x00, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+#define UVC_GUID_FORMAT_BGR3 \
+	{ 0x7d, 0xeb, 0x36, 0xe4, 0x4f, 0x52, 0xce, 0x11, \
+	 0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}
+#define UVC_GUID_FORMAT_M420 \
+	{ 'M',  '4',  '2',  '0', 0x00, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+
+#define UVC_GUID_FORMAT_H264 \
+	{ 'H',  '2',  '6',  '4', 0x00, 0x00, 0x10, 0x00, \
+	 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+
+/* ------------------------------------------------------------------------
+ * Driver specific constants.
+ */
+
+#define DRIVER_VERSION		"1.1.1"
+
+/* Number of isochronous URBs. */
+#define UVC_URBS		5
+/* Maximum number of packets per URB. */
+#define UVC_MAX_PACKETS		32
+/* Maximum status buffer size in bytes of interrupt URB. */
+#define UVC_MAX_STATUS_SIZE	16
+
+#define UVC_CTRL_CONTROL_TIMEOUT	300
+#define UVC_CTRL_STREAMING_TIMEOUT	5000
+
+/* Maximum allowed number of control mappings per device */
+#define UVC_MAX_CONTROL_MAPPINGS	1024
+#define UVC_MAX_CONTROL_MENU_ENTRIES	32
+
+/* Devices quirks */
+#define UVC_QUIRK_STATUS_INTERVAL	0x00000001
+#define UVC_QUIRK_PROBE_MINMAX		0x00000002
+#define UVC_QUIRK_PROBE_EXTRAFIELDS	0x00000004
+#define UVC_QUIRK_BUILTIN_ISIGHT	0x00000008
+#define UVC_QUIRK_STREAM_NO_FID		0x00000010
+#define UVC_QUIRK_IGNORE_SELECTOR_UNIT	0x00000020
+#define UVC_QUIRK_FIX_BANDWIDTH		0x00000080
+#define UVC_QUIRK_PROBE_DEF		0x00000100
+#define UVC_QUIRK_RESTRICT_FRAME_RATE	0x00000200
+#define UVC_QUIRK_RESTORE_CTRLS_ON_INIT	0x00000400
+#define UVC_QUIRK_FORCE_Y8		0x00000800
+
+/* Format flags */
+#define UVC_FMT_FLAG_COMPRESSED		0x00000001
+#define UVC_FMT_FLAG_STREAM		0x00000002
+
+/* ------------------------------------------------------------------------
+ * Structures.
+ */
+
+struct uvc_device;
+
+/* TODO: Put the most frequently accessed fields at the beginning of
+ * structures to maximize cache efficiency.
+ */
+struct uvc_control_info {
+	struct list_head mappings;
+
+	__u8 entity[16];
+	__u8 index;	/* Bit index in bmControls */
+	__u8 selector;
+
+	__u16 size;
+	__u32 flags;
+};
+
+struct uvc_control_mapping {
+	struct list_head list;
+	struct list_head ev_subs;
+
+	__u32 id;
+	__u8 name[32];
+	__u8 entity[16];
+	__u8 selector;
+
+	__u8 size;
+	__u8 offset;
+	enum v4l2_ctrl_type v4l2_type;
+	__u32 data_type;
+
+	struct uvc_menu_info *menu_info;
+	__u32 menu_count;
+
+	__u32 master_id;
+	__s32 master_manual;
+	__u32 slave_ids[2];
+
+	__s32 (*get) (struct uvc_control_mapping *mapping, __u8 query,
+		      const __u8 *data);
+	void (*set) (struct uvc_control_mapping *mapping, __s32 value,
+		     __u8 *data);
+};
+
+struct uvc_control {
+	struct uvc_entity *entity;
+	struct uvc_control_info info;
+
+	__u8 index;	/* Used to match the uvc_control entry with a
+			   uvc_control_info. */
+	__u8 dirty:1,
+	     loaded:1,
+	     modified:1,
+	     cached:1,
+	     initialized:1;
+
+	__u8 *uvc_data;
+};
+
+struct uvc_format_desc {
+	char *name;
+	__u8 guid[16];
+	__u32 fcc;
+};
+
+/* The term 'entity' refers to both UVC units and UVC terminals.
+ *
+ * The type field is either the terminal type (wTerminalType in the terminal
+ * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor).
+ * As the bDescriptorSubtype field is one byte long, the type value will
+ * always have a null MSB for units. All terminal types defined by the UVC
+ * specification have a non-null MSB, so it is safe to use the MSB to
+ * differentiate between units and terminals as long as the descriptor parsing
+ * code makes sure terminal types have a non-null MSB.
+ *
+ * For terminals, the type's most significant bit stores the terminal
+ * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should
+ * always be accessed with the UVC_ENTITY_* macros and never directly.
+ */
+
+#define UVC_ENTITY_FLAG_DEFAULT		(1 << 0)
+
+struct uvc_entity {
+	struct list_head list;		/* Entity as part of a UVC device. */
+	struct list_head chain;		/* Entity as part of a video device
+					 * chain. */
+	unsigned int flags;
+
+	__u8 id;
+	__u16 type;
+	char name[64];
+
+	/* Media controller-related fields. */
+	struct video_device *vdev;
+	struct v4l2_subdev subdev;
+	unsigned int num_pads;
+	unsigned int num_links;
+	struct media_pad *pads;
+
+	union {
+		struct {
+			__u16 wObjectiveFocalLengthMin;
+			__u16 wObjectiveFocalLengthMax;
+			__u16 wOcularFocalLength;
+			__u8  bControlSize;
+			__u8  *bmControls;
+		} camera;
+
+		struct {
+			__u8  bControlSize;
+			__u8  *bmControls;
+			__u8  bTransportModeSize;
+			__u8  *bmTransportModes;
+		} media;
+
+		struct {
+		} output;
+
+		struct {
+			__u16 wMaxMultiplier;
+			__u8  bControlSize;
+			__u8  *bmControls;
+			__u8  bmVideoStandards;
+		} processing;
+
+		struct {
+		} selector;
+
+		struct {
+			__u8  guidExtensionCode[16];
+			__u8  bNumControls;
+			__u8  bControlSize;
+			__u8  *bmControls;
+			__u8  *bmControlsType;
+		} extension;
+	};
+
+	__u8 bNrInPins;
+	__u8 *baSourceID;
+
+	unsigned int ncontrols;
+	struct uvc_control *controls;
+};
+
+struct uvc_frame {
+	__u8  bFrameIndex;
+	__u8  bmCapabilities;
+	__u16 wWidth;
+	__u16 wHeight;
+	__u32 dwMinBitRate;
+	__u32 dwMaxBitRate;
+	__u32 dwMaxVideoFrameBufferSize;
+	__u8  bFrameIntervalType;
+	__u32 dwDefaultFrameInterval;
+	__u32 *dwFrameInterval;
+};
+
+struct uvc_format {
+	__u8 type;
+	__u8 index;
+	__u8 bpp;
+	__u8 colorspace;
+	__u32 fcc;
+	__u32 flags;
+
+	char name[32];
+
+	unsigned int nframes;
+	struct uvc_frame *frame;
+};
+
+struct uvc_streaming_header {
+	__u8 bNumFormats;
+	__u8 bEndpointAddress;
+	__u8 bTerminalLink;
+	__u8 bControlSize;
+	__u8 *bmaControls;
+	/* The following fields are used by input headers only. */
+	__u8 bmInfo;
+	__u8 bStillCaptureMethod;
+	__u8 bTriggerSupport;
+	__u8 bTriggerUsage;
+};
+
+enum uvc_buffer_state {
+	UVC_BUF_STATE_IDLE	= 0,
+	UVC_BUF_STATE_QUEUED	= 1,
+	UVC_BUF_STATE_ACTIVE	= 2,
+	UVC_BUF_STATE_READY	= 3,
+	UVC_BUF_STATE_DONE	= 4,
+	UVC_BUF_STATE_ERROR	= 5,
+};
+
+struct uvc_buffer {
+	struct vb2_buffer buf;
+	struct list_head queue;
+
+	enum uvc_buffer_state state;
+	unsigned int error;
+
+	void *mem;
+	unsigned int length;
+	unsigned int bytesused;
+
+	u32 pts;
+};
+
+#define UVC_QUEUE_DISCONNECTED		(1 << 0)
+#define UVC_QUEUE_DROP_CORRUPTED	(1 << 1)
+
+struct uvc_video_queue {
+	struct vb2_queue queue;
+	struct mutex mutex;			/* Protects queue */
+
+	unsigned int flags;
+	unsigned int buf_used;
+
+	spinlock_t irqlock;			/* Protects irqqueue */
+	struct list_head irqqueue;
+};
+
+struct uvc_video_chain {
+	struct uvc_device *dev;
+	struct list_head list;
+
+	struct list_head entities;		/* All entities */
+	struct uvc_entity *processing;		/* Processing unit */
+	struct uvc_entity *selector;		/* Selector unit */
+
+	struct mutex ctrl_mutex;		/* Protects ctrl.info */
+
+	struct v4l2_prio_state prio;		/* V4L2 priority state */
+	u32 caps;				/* V4L2 chain-wide caps */
+};
+
+struct uvc_stats_frame {
+	unsigned int size;		/* Number of bytes captured */
+	unsigned int first_data;	/* Index of the first non-empty packet */
+
+	unsigned int nb_packets;	/* Number of packets */
+	unsigned int nb_empty;		/* Number of empty packets */
+	unsigned int nb_invalid;	/* Number of packets with an invalid header */
+	unsigned int nb_errors;		/* Number of packets with the error bit set */
+
+	unsigned int nb_pts;		/* Number of packets with a PTS timestamp */
+	unsigned int nb_pts_diffs;	/* Number of PTS differences inside a frame */
+	unsigned int last_pts_diff;	/* Index of the last PTS difference */
+	bool has_initial_pts;		/* Whether the first non-empty packet has a PTS */
+	bool has_early_pts;		/* Whether a PTS is present before the first non-empty packet */
+	u32 pts;			/* PTS of the last packet */
+
+	unsigned int nb_scr;		/* Number of packets with a SCR timestamp */
+	unsigned int nb_scr_diffs;	/* Number of SCR.STC differences inside a frame */
+	u16 scr_sof;			/* SCR.SOF of the last packet */
+	u32 scr_stc;			/* SCR.STC of the last packet */
+};
+
+struct uvc_stats_stream {
+	struct timespec start_ts;	/* Stream start timestamp */
+	struct timespec stop_ts;	/* Stream stop timestamp */
+
+	unsigned int nb_frames;		/* Number of frames */
+
+	unsigned int nb_packets;	/* Number of packets */
+	unsigned int nb_empty;		/* Number of empty packets */
+	unsigned int nb_invalid;	/* Number of packets with an invalid header */
+	unsigned int nb_errors;		/* Number of packets with the error bit set */
+
+	unsigned int nb_pts_constant;	/* Number of frames with constant PTS */
+	unsigned int nb_pts_early;	/* Number of frames with early PTS */
+	unsigned int nb_pts_initial;	/* Number of frames with initial PTS */
+
+	unsigned int nb_scr_count_ok;	/* Number of frames with at least one SCR per non empty packet */
+	unsigned int nb_scr_diffs_ok;	/* Number of frames with varying SCR.STC */
+	unsigned int scr_sof_count;	/* STC.SOF counter accumulated since stream start */
+	unsigned int scr_sof;		/* STC.SOF of the last packet */
+	unsigned int min_sof;		/* Minimum STC.SOF value */
+	unsigned int max_sof;		/* Maximum STC.SOF value */
+};
+
+struct uvc_streaming {
+	struct list_head list;
+	struct uvc_device *dev;
+	struct video_device vdev;
+	struct uvc_video_chain *chain;
+	atomic_t active;
+
+	struct usb_interface *intf;
+	int intfnum;
+	__u16 maxpsize;
+
+	struct uvc_streaming_header header;
+	enum v4l2_buf_type type;
+
+	unsigned int nformats;
+	struct uvc_format *format;
+
+	struct uvc_streaming_control ctrl;
+	struct uvc_format *def_format;
+	struct uvc_format *cur_format;
+	struct uvc_frame *cur_frame;
+
+	/* Protect access to ctrl, cur_format, cur_frame and hardware video
+	 * probe control.
+	 */
+	struct mutex mutex;
+
+	/* Buffers queue. */
+	unsigned int frozen : 1;
+	struct uvc_video_queue queue;
+	void (*decode) (struct urb *urb, struct uvc_streaming *video,
+			struct uvc_buffer *buf);
+
+	/* Context data used by the bulk completion handler. */
+	struct {
+		__u8 header[256];
+		unsigned int header_size;
+		int skip_payload;
+		__u32 payload_size;
+		__u32 max_payload_size;
+	} bulk;
+
+	struct urb *urb[UVC_URBS];
+	char *urb_buffer[UVC_URBS];
+	dma_addr_t urb_dma[UVC_URBS];
+	unsigned int urb_size;
+
+	__u32 sequence;
+	__u8 last_fid;
+
+	/* debugfs */
+	struct dentry *debugfs_dir;
+	struct {
+		struct uvc_stats_frame frame;
+		struct uvc_stats_stream stream;
+	} stats;
+
+	/* Timestamps support. */
+	struct uvc_clock {
+		struct uvc_clock_sample {
+			u32 dev_stc;
+			u16 dev_sof;
+			struct timespec host_ts;
+			u16 host_sof;
+		} *samples;
+
+		unsigned int head;
+		unsigned int count;
+		unsigned int size;
+
+		u16 last_sof;
+		u16 sof_offset;
+
+		spinlock_t lock;
+	} clock;
+};
+
+enum uvc_device_state {
+	UVC_DEV_DISCONNECTED = 1,
+};
+
+struct uvc_device {
+	struct usb_device *udev;
+	struct usb_interface *intf;
+	unsigned long warnings;
+	__u32 quirks;
+	int intfnum;
+	char name[32];
+
+	enum uvc_device_state state;
+	struct mutex lock;		/* Protects users */
+	unsigned int users;
+	atomic_t nmappings;
+
+	/* Video control interface */
+#ifdef CONFIG_MEDIA_CONTROLLER
+	struct media_device mdev;
+#endif
+	struct v4l2_device vdev;
+	__u16 uvc_version;
+	__u32 clock_frequency;
+
+	struct list_head entities;
+	struct list_head chains;
+
+	/* Video Streaming interfaces */
+	struct list_head streams;
+	atomic_t nstreams;
+
+	/* Status Interrupt Endpoint */
+	struct usb_host_endpoint *int_ep;
+	struct urb *int_urb;
+	__u8 *status;
+	struct input_dev *input;
+	char input_phys[64];
+};
+
+enum uvc_handle_state {
+	UVC_HANDLE_PASSIVE	= 0,
+	UVC_HANDLE_ACTIVE	= 1,
+};
+
+struct uvc_fh {
+	struct v4l2_fh vfh;
+	struct uvc_video_chain *chain;
+	struct uvc_streaming *stream;
+	enum uvc_handle_state state;
+};
+
+struct uvc_driver {
+	struct usb_driver driver;
+};
+
+/* ------------------------------------------------------------------------
+ * Debugging, printing and logging
+ */
+
+#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_FRAME		(1 << 7)
+#define UVC_TRACE_SUSPEND	(1 << 8)
+#define UVC_TRACE_STATUS	(1 << 9)
+#define UVC_TRACE_VIDEO		(1 << 10)
+#define UVC_TRACE_STATS		(1 << 11)
+#define UVC_TRACE_CLOCK		(1 << 12)
+
+#define UVC_WARN_MINMAX		0
+#define UVC_WARN_PROBE_DEF	1
+#define UVC_WARN_XU_GET_RES	2
+
+extern unsigned int uvc_clock_param;
+extern unsigned int uvc_no_drop_param;
+extern unsigned int uvc_trace_param;
+extern unsigned int uvc_timeout_param;
+
+#define uvc_trace(flag, msg...) \
+	do { \
+		if (uvc_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)
+
+/* --------------------------------------------------------------------------
+ * Internal functions.
+ */
+
+/* Core driver */
+extern struct uvc_driver uvc_driver;
+
+extern struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id);
+
+/* Video buffers queue management. */
+extern int uvc_queue_init(struct uvc_video_queue *queue,
+		enum v4l2_buf_type type, int drop_corrupted);
+extern void uvc_queue_release(struct uvc_video_queue *queue);
+extern int uvc_request_buffers(struct uvc_video_queue *queue,
+		struct v4l2_requestbuffers *rb);
+extern int uvc_query_buffer(struct uvc_video_queue *queue,
+		struct v4l2_buffer *v4l2_buf);
+extern int uvc_create_buffers(struct uvc_video_queue *queue,
+		struct v4l2_create_buffers *v4l2_cb);
+extern int uvc_queue_buffer(struct uvc_video_queue *queue,
+		struct v4l2_buffer *v4l2_buf);
+extern int uvc_dequeue_buffer(struct uvc_video_queue *queue,
+		struct v4l2_buffer *v4l2_buf, int nonblocking);
+extern int uvc_queue_streamon(struct uvc_video_queue *queue,
+			      enum v4l2_buf_type type);
+extern int uvc_queue_streamoff(struct uvc_video_queue *queue,
+			       enum v4l2_buf_type type);
+extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
+extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
+		struct uvc_buffer *buf);
+extern int uvc_queue_mmap(struct uvc_video_queue *queue,
+		struct vm_area_struct *vma);
+extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue,
+		struct file *file, poll_table *wait);
+#ifndef CONFIG_MMU
+extern unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
+		unsigned long pgoff);
+#endif
+extern int uvc_queue_allocated(struct uvc_video_queue *queue);
+static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
+{
+	return vb2_is_streaming(&queue->queue);
+}
+
+/* V4L2 interface */
+extern const struct v4l2_ioctl_ops uvc_ioctl_ops;
+extern const struct v4l2_file_operations uvc_fops;
+
+/* Media controller */
+extern int uvc_mc_register_entities(struct uvc_video_chain *chain);
+extern void uvc_mc_cleanup_entity(struct uvc_entity *entity);
+
+/* Video */
+extern int uvc_video_init(struct uvc_streaming *stream);
+extern int uvc_video_suspend(struct uvc_streaming *stream);
+extern int uvc_video_resume(struct uvc_streaming *stream, int reset);
+extern int uvc_video_enable(struct uvc_streaming *stream, int enable);
+extern int uvc_probe_video(struct uvc_streaming *stream,
+		struct uvc_streaming_control *probe);
+extern int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit,
+		__u8 intfnum, __u8 cs, void *data, __u16 size);
+void uvc_video_clock_update(struct uvc_streaming *stream,
+			    struct v4l2_buffer *v4l2_buf,
+			    struct uvc_buffer *buf);
+
+/* Status */
+extern int uvc_status_init(struct uvc_device *dev);
+extern void uvc_status_cleanup(struct uvc_device *dev);
+extern int uvc_status_start(struct uvc_device *dev, gfp_t flags);
+extern void uvc_status_stop(struct uvc_device *dev);
+
+/* Controls */
+extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops;
+
+extern int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
+		struct v4l2_queryctrl *v4l2_ctrl);
+extern int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
+		struct v4l2_querymenu *query_menu);
+
+extern int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
+		const struct uvc_control_mapping *mapping);
+extern int uvc_ctrl_init_device(struct uvc_device *dev);
+extern void uvc_ctrl_cleanup_device(struct uvc_device *dev);
+extern int uvc_ctrl_restore_values(struct uvc_device *dev);
+
+extern int uvc_ctrl_begin(struct uvc_video_chain *chain);
+extern int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback,
+			const struct v4l2_ext_control *xctrls,
+			unsigned int xctrls_count);
+static inline int uvc_ctrl_commit(struct uvc_fh *handle,
+			const struct v4l2_ext_control *xctrls,
+			unsigned int xctrls_count)
+{
+	return __uvc_ctrl_commit(handle, 0, xctrls, xctrls_count);
+}
+static inline int uvc_ctrl_rollback(struct uvc_fh *handle)
+{
+	return __uvc_ctrl_commit(handle, 1, NULL, 0);
+}
+
+extern int uvc_ctrl_get(struct uvc_video_chain *chain,
+		struct v4l2_ext_control *xctrl);
+extern int uvc_ctrl_set(struct uvc_video_chain *chain,
+		struct v4l2_ext_control *xctrl);
+
+extern int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
+		struct uvc_xu_control_query *xqry);
+
+/* Utility functions */
+extern void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
+		unsigned int n_terms, unsigned int threshold);
+extern uint32_t uvc_fraction_to_interval(uint32_t numerator,
+		uint32_t denominator);
+extern struct usb_host_endpoint *uvc_find_endpoint(
+		struct usb_host_interface *alts, __u8 epaddr);
+
+/* Quirks support */
+void uvc_video_decode_isight(struct urb *urb, struct uvc_streaming *stream,
+		struct uvc_buffer *buf);
+
+/* debugfs and statistics */
+int uvc_debugfs_init(void);
+void uvc_debugfs_cleanup(void);
+int uvc_debugfs_init_stream(struct uvc_streaming *stream);
+void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream);
+
+size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf,
+			    size_t size);
+
+#endif