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-rw-r--r--drivers/media/usb/uvc/uvcvideo.h811
1 files changed, 811 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..6fb0a78b1
--- /dev/null
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -0,0 +1,811 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#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/atomic.h>
+#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 <linux/workqueue.h>
+#include <media/media-device.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-fh.h>
+#include <media/videobuf2-v4l2.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)
+
+#define UVC_EXT_GPIO_UNIT 0x7ffe
+#define UVC_EXT_GPIO_UNIT_ID 0x100
+
+/* ------------------------------------------------------------------------
+ * 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
+
+#define UVC_CTRL_CONTROL_TIMEOUT 5000
+#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
+#define UVC_QUIRK_FORCE_BPP 0x00001000
+#define UVC_QUIRK_WAKE_AUTOSUSPEND 0x00002000
+
+/* Format flags */
+#define UVC_FMT_FLAG_COMPRESSED 0x00000001
+#define UVC_FMT_FLAG_STREAM 0x00000002
+
+/* ------------------------------------------------------------------------
+ * Structures.
+ */
+
+struct gpio_desc;
+struct sg_table;
+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;
+ char *name;
+ u8 entity[16];
+ u8 selector;
+
+ u8 size;
+ u8 offset;
+ enum v4l2_ctrl_type v4l2_type;
+ u32 data_type;
+
+ const u32 *menu_mapping;
+ const char (*menu_names)[UVC_MENU_NAME_LEN];
+ unsigned long menu_mask;
+
+ 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_fh *handle; /* File handle that last changed the control. */
+};
+
+/*
+ * 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;
+
+ /*
+ * Entities exposed by the UVC device use IDs 0-255, extra entities
+ * implemented by the driver (such as the GPIO entity) use IDs 256 and
+ * up.
+ */
+ u16 id;
+ u16 type;
+ char name[64];
+ u8 guid[16];
+
+ /* 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 bNumControls;
+ u8 bControlSize;
+ u8 *bmControls;
+ u8 *bmControlsType;
+ } extension;
+
+ struct {
+ u8 bControlSize;
+ u8 *bmControls;
+ struct gpio_desc *gpio_privacy;
+ int irq;
+ } gpio;
+ };
+
+ u8 bNrInPins;
+ u8 *baSourceID;
+
+ int (*get_info)(struct uvc_device *dev, struct uvc_entity *entity,
+ u8 cs, u8 *caps);
+ int (*get_cur)(struct uvc_device *dev, struct uvc_entity *entity,
+ u8 cs, void *data, u16 size);
+
+ 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;
+ const u32 *dwFrameInterval;
+};
+
+struct uvc_format {
+ u8 type;
+ u8 index;
+ u8 bpp;
+ enum v4l2_colorspace colorspace;
+ enum v4l2_xfer_func xfer_func;
+ enum v4l2_ycbcr_encoding ycbcr_enc;
+ u32 fcc;
+ u32 flags;
+
+ unsigned int nframes;
+ const struct uvc_frame *frames;
+};
+
+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_v4l2_buffer buf;
+ struct list_head queue;
+
+ enum uvc_buffer_state state;
+ unsigned int error;
+
+ void *mem;
+ unsigned int length;
+ unsigned int bytesused;
+
+ u32 pts;
+
+ /* Asynchronous buffer handling. */
+ struct kref ref;
+};
+
+#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 */
+ u8 ctrl_class_bitmap; /* Bitmap of valid classes */
+};
+
+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 {
+ ktime_t start_ts; /* Stream start timestamp */
+ ktime_t 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 */
+};
+
+#define UVC_METADATA_BUF_SIZE 10240
+
+/**
+ * struct uvc_copy_op: Context structure to schedule asynchronous memcpy
+ *
+ * @buf: active buf object for this operation
+ * @dst: copy destination address
+ * @src: copy source address
+ * @len: copy length
+ */
+struct uvc_copy_op {
+ struct uvc_buffer *buf;
+ void *dst;
+ const __u8 *src;
+ size_t len;
+};
+
+/**
+ * struct uvc_urb - URB context management structure
+ *
+ * @urb: the URB described by this context structure
+ * @stream: UVC streaming context
+ * @buffer: memory storage for the URB
+ * @dma: Allocated DMA handle
+ * @sgt: sgt_table with the urb locations in memory
+ * @async_operations: counter to indicate the number of copy operations
+ * @copy_operations: work descriptors for asynchronous copy operations
+ * @work: work queue entry for asynchronous decode
+ */
+struct uvc_urb {
+ struct urb *urb;
+ struct uvc_streaming *stream;
+
+ char *buffer;
+ dma_addr_t dma;
+ struct sg_table *sgt;
+
+ unsigned int async_operations;
+ struct uvc_copy_op copy_operations[UVC_MAX_PACKETS];
+ struct work_struct work;
+};
+
+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;
+ const struct uvc_format *formats;
+
+ struct uvc_streaming_control ctrl;
+ const struct uvc_format *def_format;
+ const struct uvc_format *cur_format;
+ const 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;
+ struct workqueue_struct *async_wq;
+ void (*decode)(struct uvc_urb *uvc_urb, struct uvc_buffer *buf,
+ struct uvc_buffer *meta_buf);
+
+ struct {
+ struct video_device vdev;
+ struct uvc_video_queue queue;
+ u32 format;
+ } meta;
+
+ /* 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 uvc_urb uvc_urb[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;
+ u16 host_sof;
+ ktime_t host_time;
+ } *samples;
+
+ unsigned int head;
+ unsigned int count;
+ unsigned int size;
+
+ u16 last_sof;
+ u16 sof_offset;
+
+ u8 last_scr[6];
+
+ spinlock_t lock;
+ } clock;
+};
+
+#define for_each_uvc_urb(uvc_urb, uvc_streaming) \
+ for ((uvc_urb) = &(uvc_streaming)->uvc_urb[0]; \
+ (uvc_urb) < &(uvc_streaming)->uvc_urb[UVC_URBS]; \
+ ++(uvc_urb))
+
+static inline u32 uvc_urb_index(const struct uvc_urb *uvc_urb)
+{
+ return uvc_urb - &uvc_urb->stream->uvc_urb[0];
+}
+
+struct uvc_device_info {
+ u32 quirks;
+ u32 meta_format;
+ u16 uvc_version;
+ const struct uvc_control_mapping **mappings;
+};
+
+struct uvc_status_streaming {
+ u8 button;
+} __packed;
+
+struct uvc_status_control {
+ u8 bSelector;
+ u8 bAttribute;
+ u8 bValue[11];
+} __packed;
+
+struct uvc_status {
+ u8 bStatusType;
+ u8 bOriginator;
+ u8 bEvent;
+ union {
+ struct uvc_status_control control;
+ struct uvc_status_streaming streaming;
+ };
+} __packed;
+
+struct uvc_device {
+ struct usb_device *udev;
+ struct usb_interface *intf;
+ unsigned long warnings;
+ u32 quirks;
+ int intfnum;
+ char name[32];
+
+ const struct uvc_device_info *info;
+
+ 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;
+ struct kref ref;
+
+ /* Status Interrupt Endpoint */
+ struct usb_host_endpoint *int_ep;
+ struct urb *int_urb;
+ struct uvc_status *status;
+ bool flush_status;
+
+ struct input_dev *input;
+ char input_phys[64];
+
+ struct uvc_ctrl_work {
+ struct work_struct work;
+ struct urb *urb;
+ struct uvc_video_chain *chain;
+ struct uvc_control *ctrl;
+ const void *data;
+ } async_ctrl;
+
+ struct uvc_entity *gpio_unit;
+};
+
+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_DBG_PROBE (1 << 0)
+#define UVC_DBG_DESCR (1 << 1)
+#define UVC_DBG_CONTROL (1 << 2)
+#define UVC_DBG_FORMAT (1 << 3)
+#define UVC_DBG_CAPTURE (1 << 4)
+#define UVC_DBG_CALLS (1 << 5)
+#define UVC_DBG_FRAME (1 << 7)
+#define UVC_DBG_SUSPEND (1 << 8)
+#define UVC_DBG_STATUS (1 << 9)
+#define UVC_DBG_VIDEO (1 << 10)
+#define UVC_DBG_STATS (1 << 11)
+#define UVC_DBG_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_dbg_param;
+extern unsigned int uvc_timeout_param;
+extern unsigned int uvc_hw_timestamps_param;
+
+#define uvc_dbg(_dev, flag, fmt, ...) \
+do { \
+ if (uvc_dbg_param & UVC_DBG_##flag) \
+ dev_printk(KERN_DEBUG, &(_dev)->udev->dev, fmt, \
+ ##__VA_ARGS__); \
+} while (0)
+
+#define uvc_dbg_cont(flag, fmt, ...) \
+do { \
+ if (uvc_dbg_param & UVC_DBG_##flag) \
+ pr_cont(fmt, ##__VA_ARGS__); \
+} while (0)
+
+#define uvc_warn_once(_dev, warn, fmt, ...) \
+do { \
+ if (!test_and_set_bit(warn, &(_dev)->warnings)) \
+ dev_info(&(_dev)->udev->dev, fmt, ##__VA_ARGS__); \
+} while (0)
+
+/* --------------------------------------------------------------------------
+ * Internal functions.
+ */
+
+/* Core driver */
+extern struct uvc_driver uvc_driver;
+
+struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id);
+
+/* Video buffers queue management. */
+int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
+ int drop_corrupted);
+void uvc_queue_release(struct uvc_video_queue *queue);
+int uvc_request_buffers(struct uvc_video_queue *queue,
+ struct v4l2_requestbuffers *rb);
+int uvc_query_buffer(struct uvc_video_queue *queue,
+ struct v4l2_buffer *v4l2_buf);
+int uvc_create_buffers(struct uvc_video_queue *queue,
+ struct v4l2_create_buffers *v4l2_cb);
+int uvc_queue_buffer(struct uvc_video_queue *queue,
+ struct media_device *mdev,
+ struct v4l2_buffer *v4l2_buf);
+int uvc_export_buffer(struct uvc_video_queue *queue,
+ struct v4l2_exportbuffer *exp);
+int uvc_dequeue_buffer(struct uvc_video_queue *queue,
+ struct v4l2_buffer *v4l2_buf, int nonblocking);
+int uvc_queue_streamon(struct uvc_video_queue *queue, enum v4l2_buf_type type);
+int uvc_queue_streamoff(struct uvc_video_queue *queue, enum v4l2_buf_type type);
+void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
+struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
+ struct uvc_buffer *buf);
+struct uvc_buffer *uvc_queue_get_current_buffer(struct uvc_video_queue *queue);
+void uvc_queue_buffer_release(struct uvc_buffer *buf);
+int uvc_queue_mmap(struct uvc_video_queue *queue,
+ struct vm_area_struct *vma);
+__poll_t uvc_queue_poll(struct uvc_video_queue *queue, struct file *file,
+ poll_table *wait);
+#ifndef CONFIG_MMU
+unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
+ unsigned long pgoff);
+#endif
+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);
+}
+
+static inline struct uvc_streaming *
+uvc_queue_to_stream(struct uvc_video_queue *queue)
+{
+ return container_of(queue, struct uvc_streaming, queue);
+}
+
+/* V4L2 interface */
+extern const struct v4l2_ioctl_ops uvc_ioctl_ops;
+extern const struct v4l2_file_operations uvc_fops;
+
+/* Media controller */
+int uvc_mc_register_entities(struct uvc_video_chain *chain);
+void uvc_mc_cleanup_entity(struct uvc_entity *entity);
+
+/* Video */
+int uvc_video_init(struct uvc_streaming *stream);
+int uvc_video_suspend(struct uvc_streaming *stream);
+int uvc_video_resume(struct uvc_streaming *stream, int reset);
+int uvc_video_start_streaming(struct uvc_streaming *stream);
+void uvc_video_stop_streaming(struct uvc_streaming *stream);
+int uvc_probe_video(struct uvc_streaming *stream,
+ struct uvc_streaming_control *probe);
+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 vb2_v4l2_buffer *vbuf,
+ struct uvc_buffer *buf);
+int uvc_meta_register(struct uvc_streaming *stream);
+
+int uvc_register_video_device(struct uvc_device *dev,
+ struct uvc_streaming *stream,
+ struct video_device *vdev,
+ struct uvc_video_queue *queue,
+ enum v4l2_buf_type type,
+ const struct v4l2_file_operations *fops,
+ const struct v4l2_ioctl_ops *ioctl_ops);
+
+/* Status */
+int uvc_status_init(struct uvc_device *dev);
+void uvc_status_unregister(struct uvc_device *dev);
+void uvc_status_cleanup(struct uvc_device *dev);
+int uvc_status_start(struct uvc_device *dev, gfp_t flags);
+void uvc_status_stop(struct uvc_device *dev);
+
+/* Controls */
+extern const struct uvc_control_mapping uvc_ctrl_power_line_mapping_limited;
+extern const struct uvc_control_mapping uvc_ctrl_power_line_mapping_uvc11;
+extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops;
+
+int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
+ struct v4l2_queryctrl *v4l2_ctrl);
+int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
+ struct v4l2_querymenu *query_menu);
+
+int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
+ const struct uvc_control_mapping *mapping);
+int uvc_ctrl_init_device(struct uvc_device *dev);
+void uvc_ctrl_cleanup_device(struct uvc_device *dev);
+int uvc_ctrl_restore_values(struct uvc_device *dev);
+bool uvc_ctrl_status_event_async(struct urb *urb, struct uvc_video_chain *chain,
+ struct uvc_control *ctrl, const u8 *data);
+void uvc_ctrl_status_event(struct uvc_video_chain *chain,
+ struct uvc_control *ctrl, const u8 *data);
+
+int uvc_ctrl_begin(struct uvc_video_chain *chain);
+int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback,
+ struct v4l2_ext_controls *ctrls);
+static inline int uvc_ctrl_commit(struct uvc_fh *handle,
+ struct v4l2_ext_controls *ctrls)
+{
+ return __uvc_ctrl_commit(handle, 0, ctrls);
+}
+static inline int uvc_ctrl_rollback(struct uvc_fh *handle)
+{
+ return __uvc_ctrl_commit(handle, 1, NULL);
+}
+
+int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl);
+int uvc_ctrl_set(struct uvc_fh *handle, struct v4l2_ext_control *xctrl);
+int uvc_ctrl_is_accessible(struct uvc_video_chain *chain, u32 v4l2_id,
+ const struct v4l2_ext_controls *ctrls,
+ unsigned long ioctl);
+
+int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
+ struct uvc_xu_control_query *xqry);
+
+/* Utility functions */
+struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts,
+ u8 epaddr);
+u16 uvc_endpoint_max_bpi(struct usb_device *dev, struct usb_host_endpoint *ep);
+
+/* Quirks support */
+void uvc_video_decode_isight(struct uvc_urb *uvc_urb,
+ struct uvc_buffer *buf,
+ struct uvc_buffer *meta_buf);
+
+/* debugfs and statistics */
+void uvc_debugfs_init(void);
+void uvc_debugfs_cleanup(void);
+void 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
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-14 19:40:49 +0000