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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef _USB_VIDEO_H_3#define _USB_VIDEO_H_4 5#ifndef __KERNEL__6#error "The uvcvideo.h header is deprecated, use linux/uvcvideo.h instead."7#endif /* __KERNEL__ */8 9#include <linux/atomic.h>10#include <linux/kernel.h>11#include <linux/poll.h>12#include <linux/usb.h>13#include <linux/usb/video.h>14#include <linux/uvcvideo.h>15#include <linux/videodev2.h>16#include <linux/workqueue.h>17#include <media/media-device.h>18#include <media/v4l2-device.h>19#include <media/v4l2-event.h>20#include <media/v4l2-fh.h>21#include <media/videobuf2-v4l2.h>22 23/* --------------------------------------------------------------------------24 * UVC constants25 */26 27#define UVC_TERM_INPUT 0x000028#define UVC_TERM_OUTPUT 0x800029#define UVC_TERM_DIRECTION(term) ((term)->type & 0x8000)30 31#define UVC_ENTITY_TYPE(entity) ((entity)->type & 0x7fff)32#define UVC_ENTITY_IS_UNIT(entity) (((entity)->type & 0xff00) == 0)33#define UVC_ENTITY_IS_TERM(entity) (((entity)->type & 0xff00) != 0)34#define UVC_ENTITY_IS_ITERM(entity) \35 (UVC_ENTITY_IS_TERM(entity) && \36 ((entity)->type & 0x8000) == UVC_TERM_INPUT)37#define UVC_ENTITY_IS_OTERM(entity) \38 (UVC_ENTITY_IS_TERM(entity) && \39 ((entity)->type & 0x8000) == UVC_TERM_OUTPUT)40 41#define UVC_EXT_GPIO_UNIT 0x7ffe42#define UVC_EXT_GPIO_UNIT_ID 0x10043 44/* ------------------------------------------------------------------------45 * Driver specific constants.46 */47 48#define DRIVER_VERSION "1.1.1"49 50/* Number of isochronous URBs. */51#define UVC_URBS 552/* Maximum number of packets per URB. */53#define UVC_MAX_PACKETS 3254 55#define UVC_CTRL_CONTROL_TIMEOUT 500056#define UVC_CTRL_STREAMING_TIMEOUT 500057 58/* Maximum allowed number of control mappings per device */59#define UVC_MAX_CONTROL_MAPPINGS 102460#define UVC_MAX_CONTROL_MENU_ENTRIES 3261 62/* Devices quirks */63#define UVC_QUIRK_STATUS_INTERVAL 0x0000000164#define UVC_QUIRK_PROBE_MINMAX 0x0000000265#define UVC_QUIRK_PROBE_EXTRAFIELDS 0x0000000466#define UVC_QUIRK_BUILTIN_ISIGHT 0x0000000867#define UVC_QUIRK_STREAM_NO_FID 0x0000001068#define UVC_QUIRK_IGNORE_SELECTOR_UNIT 0x0000002069#define UVC_QUIRK_FIX_BANDWIDTH 0x0000008070#define UVC_QUIRK_PROBE_DEF 0x0000010071#define UVC_QUIRK_RESTRICT_FRAME_RATE 0x0000020072#define UVC_QUIRK_RESTORE_CTRLS_ON_INIT 0x0000040073#define UVC_QUIRK_FORCE_Y8 0x0000080074#define UVC_QUIRK_FORCE_BPP 0x0000100075#define UVC_QUIRK_WAKE_AUTOSUSPEND 0x0000200076#define UVC_QUIRK_NO_RESET_RESUME 0x0000400077#define UVC_QUIRK_DISABLE_AUTOSUSPEND 0x0000800078#define UVC_QUIRK_INVALID_DEVICE_SOF 0x0001000079 80/* Format flags */81#define UVC_FMT_FLAG_COMPRESSED 0x0000000182#define UVC_FMT_FLAG_STREAM 0x0000000283 84/* ------------------------------------------------------------------------85 * Structures.86 */87 88struct gpio_desc;89struct sg_table;90struct uvc_control;91struct uvc_device;92struct uvc_video_chain;93 94/*95 * TODO: Put the most frequently accessed fields at the beginning of96 * structures to maximize cache efficiency.97 */98struct uvc_control_info {99 struct list_head mappings;100 101 u8 entity[16];102 u8 index; /* Bit index in bmControls */103 u8 selector;104 105 u16 size;106 u32 flags;107};108 109struct uvc_control_mapping {110 struct list_head list;111 struct list_head ev_subs;112 113 u32 id;114 char *name;115 u8 entity[16];116 u8 selector;117 118 u8 size;119 u8 offset;120 enum v4l2_ctrl_type v4l2_type;121 u32 data_type;122 123 const u32 *menu_mapping;124 const char (*menu_names)[UVC_MENU_NAME_LEN];125 unsigned long menu_mask;126 127 u32 master_id;128 s32 master_manual;129 u32 slave_ids[2];130 131 const struct uvc_control_mapping *(*filter_mapping)132 (struct uvc_video_chain *chain,133 struct uvc_control *ctrl);134 s32 (*get)(struct uvc_control_mapping *mapping, u8 query,135 const u8 *data);136 void (*set)(struct uvc_control_mapping *mapping, s32 value,137 u8 *data);138};139 140struct uvc_control {141 struct uvc_entity *entity;142 struct uvc_control_info info;143 144 u8 index; /* Used to match the uvc_control entry with a uvc_control_info. */145 u8 dirty:1,146 loaded:1,147 modified:1,148 cached:1,149 initialized:1;150 151 u8 *uvc_data;152 153 struct uvc_fh *handle; /* File handle that last changed the control. */154};155 156/*157 * The term 'entity' refers to both UVC units and UVC terminals.158 *159 * The type field is either the terminal type (wTerminalType in the terminal160 * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor).161 * As the bDescriptorSubtype field is one byte long, the type value will162 * always have a null MSB for units. All terminal types defined by the UVC163 * specification have a non-null MSB, so it is safe to use the MSB to164 * differentiate between units and terminals as long as the descriptor parsing165 * code makes sure terminal types have a non-null MSB.166 *167 * For terminals, the type's most significant bit stores the terminal168 * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should169 * always be accessed with the UVC_ENTITY_* macros and never directly.170 */171 172#define UVC_ENTITY_FLAG_DEFAULT (1 << 0)173 174struct uvc_entity {175 struct list_head list; /* Entity as part of a UVC device. */176 struct list_head chain; /* Entity as part of a video device chain. */177 unsigned int flags;178 179 /*180 * Entities exposed by the UVC device use IDs 0-255, extra entities181 * implemented by the driver (such as the GPIO entity) use IDs 256 and182 * up.183 */184 u16 id;185 u16 type;186 char name[64];187 u8 guid[16];188 189 /* Media controller-related fields. */190 struct video_device *vdev;191 struct v4l2_subdev subdev;192 unsigned int num_pads;193 unsigned int num_links;194 struct media_pad *pads;195 196 union {197 struct {198 u16 wObjectiveFocalLengthMin;199 u16 wObjectiveFocalLengthMax;200 u16 wOcularFocalLength;201 u8 bControlSize;202 u8 *bmControls;203 } camera;204 205 struct {206 u8 bControlSize;207 u8 *bmControls;208 u8 bTransportModeSize;209 u8 *bmTransportModes;210 } media;211 212 struct {213 } output;214 215 struct {216 u16 wMaxMultiplier;217 u8 bControlSize;218 u8 *bmControls;219 u8 bmVideoStandards;220 } processing;221 222 struct {223 } selector;224 225 struct {226 u8 bNumControls;227 u8 bControlSize;228 u8 *bmControls;229 u8 *bmControlsType;230 } extension;231 232 struct {233 u8 bControlSize;234 u8 *bmControls;235 struct gpio_desc *gpio_privacy;236 int irq;237 } gpio;238 };239 240 u8 bNrInPins;241 u8 *baSourceID;242 243 int (*get_info)(struct uvc_device *dev, struct uvc_entity *entity,244 u8 cs, u8 *caps);245 int (*get_cur)(struct uvc_device *dev, struct uvc_entity *entity,246 u8 cs, void *data, u16 size);247 248 unsigned int ncontrols;249 struct uvc_control *controls;250};251 252struct uvc_frame {253 u8 bFrameIndex;254 u8 bmCapabilities;255 u16 wWidth;256 u16 wHeight;257 u32 dwMinBitRate;258 u32 dwMaxBitRate;259 u32 dwMaxVideoFrameBufferSize;260 u8 bFrameIntervalType;261 u32 dwDefaultFrameInterval;262 const u32 *dwFrameInterval;263};264 265struct uvc_format {266 u8 type;267 u8 index;268 u8 bpp;269 enum v4l2_colorspace colorspace;270 enum v4l2_xfer_func xfer_func;271 enum v4l2_ycbcr_encoding ycbcr_enc;272 u32 fcc;273 u32 flags;274 275 unsigned int nframes;276 const struct uvc_frame *frames;277};278 279struct uvc_streaming_header {280 u8 bNumFormats;281 u8 bEndpointAddress;282 u8 bTerminalLink;283 u8 bControlSize;284 u8 *bmaControls;285 /* The following fields are used by input headers only. */286 u8 bmInfo;287 u8 bStillCaptureMethod;288 u8 bTriggerSupport;289 u8 bTriggerUsage;290};291 292enum uvc_buffer_state {293 UVC_BUF_STATE_IDLE = 0,294 UVC_BUF_STATE_QUEUED = 1,295 UVC_BUF_STATE_ACTIVE = 2,296 UVC_BUF_STATE_READY = 3,297 UVC_BUF_STATE_DONE = 4,298 UVC_BUF_STATE_ERROR = 5,299};300 301struct uvc_buffer {302 struct vb2_v4l2_buffer buf;303 struct list_head queue;304 305 enum uvc_buffer_state state;306 unsigned int error;307 308 void *mem;309 unsigned int length;310 unsigned int bytesused;311 312 u32 pts;313 314 /* Asynchronous buffer handling. */315 struct kref ref;316};317 318#define UVC_QUEUE_DISCONNECTED (1 << 0)319#define UVC_QUEUE_DROP_CORRUPTED (1 << 1)320 321struct uvc_video_queue {322 struct vb2_queue queue;323 struct mutex mutex; /* Protects queue */324 325 unsigned int flags;326 unsigned int buf_used;327 328 spinlock_t irqlock; /* Protects irqqueue */329 struct list_head irqqueue;330};331 332struct uvc_video_chain {333 struct uvc_device *dev;334 struct list_head list;335 336 struct list_head entities; /* All entities */337 struct uvc_entity *processing; /* Processing unit */338 struct uvc_entity *selector; /* Selector unit */339 340 struct mutex ctrl_mutex; /* Protects ctrl.info */341 342 struct v4l2_prio_state prio; /* V4L2 priority state */343 u32 caps; /* V4L2 chain-wide caps */344 u8 ctrl_class_bitmap; /* Bitmap of valid classes */345};346 347struct uvc_stats_frame {348 unsigned int size; /* Number of bytes captured */349 unsigned int first_data; /* Index of the first non-empty packet */350 351 unsigned int nb_packets; /* Number of packets */352 unsigned int nb_empty; /* Number of empty packets */353 unsigned int nb_invalid; /* Number of packets with an invalid header */354 unsigned int nb_errors; /* Number of packets with the error bit set */355 356 unsigned int nb_pts; /* Number of packets with a PTS timestamp */357 unsigned int nb_pts_diffs; /* Number of PTS differences inside a frame */358 unsigned int last_pts_diff; /* Index of the last PTS difference */359 bool has_initial_pts; /* Whether the first non-empty packet has a PTS */360 bool has_early_pts; /* Whether a PTS is present before the first non-empty packet */361 u32 pts; /* PTS of the last packet */362 363 unsigned int nb_scr; /* Number of packets with a SCR timestamp */364 unsigned int nb_scr_diffs; /* Number of SCR.STC differences inside a frame */365 u16 scr_sof; /* SCR.SOF of the last packet */366 u32 scr_stc; /* SCR.STC of the last packet */367};368 369struct uvc_stats_stream {370 ktime_t start_ts; /* Stream start timestamp */371 ktime_t stop_ts; /* Stream stop timestamp */372 373 unsigned int nb_frames; /* Number of frames */374 375 unsigned int nb_packets; /* Number of packets */376 unsigned int nb_empty; /* Number of empty packets */377 unsigned int nb_invalid; /* Number of packets with an invalid header */378 unsigned int nb_errors; /* Number of packets with the error bit set */379 380 unsigned int nb_pts_constant; /* Number of frames with constant PTS */381 unsigned int nb_pts_early; /* Number of frames with early PTS */382 unsigned int nb_pts_initial; /* Number of frames with initial PTS */383 384 unsigned int nb_scr_count_ok; /* Number of frames with at least one SCR per non empty packet */385 unsigned int nb_scr_diffs_ok; /* Number of frames with varying SCR.STC */386 unsigned int scr_sof_count; /* STC.SOF counter accumulated since stream start */387 unsigned int scr_sof; /* STC.SOF of the last packet */388 unsigned int min_sof; /* Minimum STC.SOF value */389 unsigned int max_sof; /* Maximum STC.SOF value */390};391 392#define UVC_METADATA_BUF_SIZE 10240393 394/**395 * struct uvc_copy_op: Context structure to schedule asynchronous memcpy396 *397 * @buf: active buf object for this operation398 * @dst: copy destination address399 * @src: copy source address400 * @len: copy length401 */402struct uvc_copy_op {403 struct uvc_buffer *buf;404 void *dst;405 const __u8 *src;406 size_t len;407};408 409/**410 * struct uvc_urb - URB context management structure411 *412 * @urb: the URB described by this context structure413 * @stream: UVC streaming context414 * @buffer: memory storage for the URB415 * @dma: Allocated DMA handle416 * @sgt: sgt_table with the urb locations in memory417 * @async_operations: counter to indicate the number of copy operations418 * @copy_operations: work descriptors for asynchronous copy operations419 * @work: work queue entry for asynchronous decode420 */421struct uvc_urb {422 struct urb *urb;423 struct uvc_streaming *stream;424 425 char *buffer;426 dma_addr_t dma;427 struct sg_table *sgt;428 429 unsigned int async_operations;430 struct uvc_copy_op copy_operations[UVC_MAX_PACKETS];431 struct work_struct work;432};433 434struct uvc_streaming {435 struct list_head list;436 struct uvc_device *dev;437 struct video_device vdev;438 struct uvc_video_chain *chain;439 atomic_t active;440 441 struct usb_interface *intf;442 int intfnum;443 u16 maxpsize;444 445 struct uvc_streaming_header header;446 enum v4l2_buf_type type;447 448 unsigned int nformats;449 const struct uvc_format *formats;450 451 struct uvc_streaming_control ctrl;452 const struct uvc_format *def_format;453 const struct uvc_format *cur_format;454 const struct uvc_frame *cur_frame;455 456 /*457 * Protect access to ctrl, cur_format, cur_frame and hardware video458 * probe control.459 */460 struct mutex mutex;461 462 /* Buffers queue. */463 unsigned int frozen : 1;464 struct uvc_video_queue queue;465 struct workqueue_struct *async_wq;466 void (*decode)(struct uvc_urb *uvc_urb, struct uvc_buffer *buf,467 struct uvc_buffer *meta_buf);468 469 struct {470 struct video_device vdev;471 struct uvc_video_queue queue;472 u32 format;473 } meta;474 475 /* Context data used by the bulk completion handler. */476 struct {477 u8 header[256];478 unsigned int header_size;479 int skip_payload;480 u32 payload_size;481 u32 max_payload_size;482 } bulk;483 484 struct uvc_urb uvc_urb[UVC_URBS];485 unsigned int urb_size;486 487 u32 sequence;488 u8 last_fid;489 490 /* debugfs */491 struct dentry *debugfs_dir;492 struct {493 struct uvc_stats_frame frame;494 struct uvc_stats_stream stream;495 } stats;496 497 /* Timestamps support. */498 struct uvc_clock {499 struct uvc_clock_sample {500 u32 dev_stc;501 u16 dev_sof;502 u16 host_sof;503 ktime_t host_time;504 } *samples;505 506 unsigned int head;507 unsigned int count;508 unsigned int size;509 unsigned int last_sof_overflow;510 511 u16 last_sof;512 u16 sof_offset;513 514 u8 last_scr[6];515 516 spinlock_t lock;517 } clock;518};519 520#define for_each_uvc_urb(uvc_urb, uvc_streaming) \521 for ((uvc_urb) = &(uvc_streaming)->uvc_urb[0]; \522 (uvc_urb) < &(uvc_streaming)->uvc_urb[UVC_URBS]; \523 ++(uvc_urb))524 525static inline u32 uvc_urb_index(const struct uvc_urb *uvc_urb)526{527 return uvc_urb - &uvc_urb->stream->uvc_urb[0];528}529 530struct uvc_device_info {531 u32 quirks;532 u32 meta_format;533 u16 uvc_version;534};535 536struct uvc_status_streaming {537 u8 button;538} __packed;539 540struct uvc_status_control {541 u8 bSelector;542 u8 bAttribute;543 u8 bValue[11];544} __packed;545 546struct uvc_status {547 u8 bStatusType;548 u8 bOriginator;549 u8 bEvent;550 union {551 struct uvc_status_control control;552 struct uvc_status_streaming streaming;553 };554} __packed;555 556struct uvc_device {557 struct usb_device *udev;558 struct usb_interface *intf;559 unsigned long warnings;560 u32 quirks;561 int intfnum;562 char name[32];563 564 const struct uvc_device_info *info;565 566 struct mutex lock; /* Protects users */567 unsigned int users;568 atomic_t nmappings;569 570 /* Video control interface */571#ifdef CONFIG_MEDIA_CONTROLLER572 struct media_device mdev;573#endif574 struct v4l2_device vdev;575 u16 uvc_version;576 u32 clock_frequency;577 578 struct list_head entities;579 struct list_head chains;580 581 /* Video Streaming interfaces */582 struct list_head streams;583 struct kref ref;584 585 /* Status Interrupt Endpoint */586 struct usb_host_endpoint *int_ep;587 struct urb *int_urb;588 struct uvc_status *status;589 bool flush_status;590 591 struct input_dev *input;592 char input_phys[64];593 594 struct uvc_ctrl_work {595 struct work_struct work;596 struct urb *urb;597 struct uvc_video_chain *chain;598 struct uvc_control *ctrl;599 const void *data;600 } async_ctrl;601 602 struct uvc_entity *gpio_unit;603};604 605enum uvc_handle_state {606 UVC_HANDLE_PASSIVE = 0,607 UVC_HANDLE_ACTIVE = 1,608};609 610struct uvc_fh {611 struct v4l2_fh vfh;612 struct uvc_video_chain *chain;613 struct uvc_streaming *stream;614 enum uvc_handle_state state;615};616 617struct uvc_driver {618 struct usb_driver driver;619};620 621/* ------------------------------------------------------------------------622 * Debugging, printing and logging623 */624 625#define UVC_DBG_PROBE (1 << 0)626#define UVC_DBG_DESCR (1 << 1)627#define UVC_DBG_CONTROL (1 << 2)628#define UVC_DBG_FORMAT (1 << 3)629#define UVC_DBG_CAPTURE (1 << 4)630#define UVC_DBG_CALLS (1 << 5)631#define UVC_DBG_FRAME (1 << 7)632#define UVC_DBG_SUSPEND (1 << 8)633#define UVC_DBG_STATUS (1 << 9)634#define UVC_DBG_VIDEO (1 << 10)635#define UVC_DBG_STATS (1 << 11)636#define UVC_DBG_CLOCK (1 << 12)637 638#define UVC_WARN_MINMAX 0639#define UVC_WARN_PROBE_DEF 1640#define UVC_WARN_XU_GET_RES 2641 642extern unsigned int uvc_clock_param;643extern unsigned int uvc_no_drop_param;644extern unsigned int uvc_dbg_param;645extern unsigned int uvc_timeout_param;646extern unsigned int uvc_hw_timestamps_param;647 648#define uvc_dbg(_dev, flag, fmt, ...) \649do { \650 if (uvc_dbg_param & UVC_DBG_##flag) \651 dev_printk(KERN_DEBUG, &(_dev)->udev->dev, fmt, \652 ##__VA_ARGS__); \653} while (0)654 655#define uvc_dbg_cont(flag, fmt, ...) \656do { \657 if (uvc_dbg_param & UVC_DBG_##flag) \658 pr_cont(fmt, ##__VA_ARGS__); \659} while (0)660 661#define uvc_warn_once(_dev, warn, fmt, ...) \662do { \663 if (!test_and_set_bit(warn, &(_dev)->warnings)) \664 dev_info(&(_dev)->udev->dev, fmt, ##__VA_ARGS__); \665} while (0)666 667/* --------------------------------------------------------------------------668 * Internal functions.669 */670 671/* Core driver */672extern struct uvc_driver uvc_driver;673 674struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id);675 676/* Video buffers queue management. */677int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,678 int drop_corrupted);679void uvc_queue_release(struct uvc_video_queue *queue);680int uvc_request_buffers(struct uvc_video_queue *queue,681 struct v4l2_requestbuffers *rb);682int uvc_query_buffer(struct uvc_video_queue *queue,683 struct v4l2_buffer *v4l2_buf);684int uvc_create_buffers(struct uvc_video_queue *queue,685 struct v4l2_create_buffers *v4l2_cb);686int uvc_queue_buffer(struct uvc_video_queue *queue,687 struct media_device *mdev,688 struct v4l2_buffer *v4l2_buf);689int uvc_export_buffer(struct uvc_video_queue *queue,690 struct v4l2_exportbuffer *exp);691int uvc_dequeue_buffer(struct uvc_video_queue *queue,692 struct v4l2_buffer *v4l2_buf, int nonblocking);693int uvc_queue_streamon(struct uvc_video_queue *queue, enum v4l2_buf_type type);694int uvc_queue_streamoff(struct uvc_video_queue *queue, enum v4l2_buf_type type);695void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);696struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,697 struct uvc_buffer *buf);698struct uvc_buffer *uvc_queue_get_current_buffer(struct uvc_video_queue *queue);699void uvc_queue_buffer_release(struct uvc_buffer *buf);700int uvc_queue_mmap(struct uvc_video_queue *queue,701 struct vm_area_struct *vma);702__poll_t uvc_queue_poll(struct uvc_video_queue *queue, struct file *file,703 poll_table *wait);704#ifndef CONFIG_MMU705unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,706 unsigned long pgoff);707#endif708int uvc_queue_allocated(struct uvc_video_queue *queue);709static inline int uvc_queue_streaming(struct uvc_video_queue *queue)710{711 return vb2_is_streaming(&queue->queue);712}713 714static inline struct uvc_streaming *715uvc_queue_to_stream(struct uvc_video_queue *queue)716{717 return container_of(queue, struct uvc_streaming, queue);718}719 720/* V4L2 interface */721extern const struct v4l2_ioctl_ops uvc_ioctl_ops;722extern const struct v4l2_file_operations uvc_fops;723 724/* Media controller */725int uvc_mc_register_entities(struct uvc_video_chain *chain);726void uvc_mc_cleanup_entity(struct uvc_entity *entity);727 728/* Video */729int uvc_video_init(struct uvc_streaming *stream);730int uvc_video_suspend(struct uvc_streaming *stream);731int uvc_video_resume(struct uvc_streaming *stream, int reset);732int uvc_video_start_streaming(struct uvc_streaming *stream);733void uvc_video_stop_streaming(struct uvc_streaming *stream);734int uvc_probe_video(struct uvc_streaming *stream,735 struct uvc_streaming_control *probe);736int uvc_query_ctrl(struct uvc_device *dev, u8 query, u8 unit,737 u8 intfnum, u8 cs, void *data, u16 size);738void uvc_video_clock_update(struct uvc_streaming *stream,739 struct vb2_v4l2_buffer *vbuf,740 struct uvc_buffer *buf);741int uvc_meta_register(struct uvc_streaming *stream);742 743int uvc_register_video_device(struct uvc_device *dev,744 struct uvc_streaming *stream,745 struct video_device *vdev,746 struct uvc_video_queue *queue,747 enum v4l2_buf_type type,748 const struct v4l2_file_operations *fops,749 const struct v4l2_ioctl_ops *ioctl_ops);750 751/* Status */752int uvc_status_init(struct uvc_device *dev);753void uvc_status_unregister(struct uvc_device *dev);754void uvc_status_cleanup(struct uvc_device *dev);755int uvc_status_start(struct uvc_device *dev, gfp_t flags);756void uvc_status_stop(struct uvc_device *dev);757 758/* Controls */759extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops;760 761int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,762 struct v4l2_queryctrl *v4l2_ctrl);763int uvc_query_v4l2_menu(struct uvc_video_chain *chain,764 struct v4l2_querymenu *query_menu);765 766int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,767 const struct uvc_control_mapping *mapping);768int uvc_ctrl_init_device(struct uvc_device *dev);769void uvc_ctrl_cleanup_device(struct uvc_device *dev);770int uvc_ctrl_restore_values(struct uvc_device *dev);771bool uvc_ctrl_status_event_async(struct urb *urb, struct uvc_video_chain *chain,772 struct uvc_control *ctrl, const u8 *data);773void uvc_ctrl_status_event(struct uvc_video_chain *chain,774 struct uvc_control *ctrl, const u8 *data);775 776int uvc_ctrl_begin(struct uvc_video_chain *chain);777int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback,778 struct v4l2_ext_controls *ctrls);779static inline int uvc_ctrl_commit(struct uvc_fh *handle,780 struct v4l2_ext_controls *ctrls)781{782 return __uvc_ctrl_commit(handle, 0, ctrls);783}784static inline int uvc_ctrl_rollback(struct uvc_fh *handle)785{786 return __uvc_ctrl_commit(handle, 1, NULL);787}788 789int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl);790int uvc_ctrl_set(struct uvc_fh *handle, struct v4l2_ext_control *xctrl);791int uvc_ctrl_is_accessible(struct uvc_video_chain *chain, u32 v4l2_id,792 const struct v4l2_ext_controls *ctrls,793 unsigned long ioctl);794 795int uvc_xu_ctrl_query(struct uvc_video_chain *chain,796 struct uvc_xu_control_query *xqry);797 798/* Utility functions */799struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts,800 u8 epaddr);801u16 uvc_endpoint_max_bpi(struct usb_device *dev, struct usb_host_endpoint *ep);802 803/* Quirks support */804void uvc_video_decode_isight(struct uvc_urb *uvc_urb,805 struct uvc_buffer *buf,806 struct uvc_buffer *meta_buf);807 808/* debugfs and statistics */809void uvc_debugfs_init(void);810void uvc_debugfs_cleanup(void);811void uvc_debugfs_init_stream(struct uvc_streaming *stream);812void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream);813 814size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf,815 size_t size);816 817#endif818