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authorMauro Carvalho Chehab <mchehab@redhat.com>2012-08-14 00:13:22 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-08-15 16:25:07 -0300
commit0c0d06cac63ee327ceaab4b5ffe2206574ab86bd (patch)
treee759f0dc3185d97f2a0c6b5cd5e32ea6faa74d40 /drivers/media/usb/uvc/uvcvideo.h
parent84cfe9e79bd5ac11c963f4841158454fefa872f6 (diff)
[media] rename most media/video usb drivers to media/usb
Rename all USB drivers with their own directory under drivers/media/video into drivers/media/usb and update the building system. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/usb/uvc/uvcvideo.h')
-rw-r--r--drivers/media/usb/uvc/uvcvideo.h718
1 files changed, 718 insertions, 0 deletions
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
new file mode 100644
index 000000000000..3764040475bb
--- /dev/null
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -0,0 +1,718 @@
+#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_RGBP \
+ { 'R', 'G', 'B', 'P', 0x00, 0x00, 0x10, 0x00, \
+ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
+#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 number of video buffers. */
+#define UVC_MAX_VIDEO_BUFFERS 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
+
+/* 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.
+ */
+
+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. */
+ __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 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 *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;
+ atomic_t 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_IOCTL (1 << 6)
+#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 void uvc_queue_init(struct uvc_video_queue *queue,
+ enum v4l2_buf_type type, int drop_corrupted);
+extern int uvc_alloc_buffers(struct uvc_video_queue *queue,
+ struct v4l2_requestbuffers *rb);
+extern void uvc_free_buffers(struct uvc_video_queue *queue);
+extern int uvc_query_buffer(struct uvc_video_queue *queue,
+ struct v4l2_buffer *v4l2_buf);
+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_enable(struct uvc_video_queue *queue, int enable);
+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_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);
+extern void uvc_status_stop(struct uvc_device *dev);
+extern int uvc_status_suspend(struct uvc_device *dev);
+extern int uvc_status_resume(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_resume_device(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

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