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/kernel.h>
10 #include <linux/poll.h>
11 #include <linux/usb.h>
12 #include <linux/usb/video.h>
13 #include <linux/uvcvideo.h>
14 #include <linux/videodev2.h>
15 #include <linux/workqueue.h>
16 #include <media/media-device.h>
17 #include <media/v4l2-device.h>
18 #include <media/v4l2-event.h>
19 #include <media/v4l2-fh.h>
20 #include <media/videobuf2-v4l2.h>
21
22 /* --------------------------------------------------------------------------
23 * UVC constants
24 */
25
26 #define UVC_TERM_INPUT 0x0000
27 #define UVC_TERM_OUTPUT 0x8000
28 #define UVC_TERM_DIRECTION(term) ((term)->type & 0x8000)
29
30 #define UVC_ENTITY_TYPE(entity) ((entity)->type & 0x7fff)
31 #define UVC_ENTITY_IS_UNIT(entity) (((entity)->type & 0xff00) == 0)
32 #define UVC_ENTITY_IS_TERM(entity) (((entity)->type & 0xff00) != 0)
33 #define UVC_ENTITY_IS_ITERM(entity) \
34 (UVC_ENTITY_IS_TERM(entity) && \
35 ((entity)->type & 0x8000) == UVC_TERM_INPUT)
36 #define UVC_ENTITY_IS_OTERM(entity) \
37 (UVC_ENTITY_IS_TERM(entity) && \
38 ((entity)->type & 0x8000) == UVC_TERM_OUTPUT)
39
40
41 /* ------------------------------------------------------------------------
42 * Driver specific constants.
43 */
44
45 #define DRIVER_VERSION "1.1.1"
46
47 /* Number of isochronous URBs. */
48 #define UVC_URBS 5
49 /* Maximum number of packets per URB. */
50 #define UVC_MAX_PACKETS 32
51 /* Maximum status buffer size in bytes of interrupt URB. */
52 #define UVC_MAX_STATUS_SIZE 16
53
54 #define UVC_CTRL_CONTROL_TIMEOUT 5000
55 #define UVC_CTRL_STREAMING_TIMEOUT 5000
56
57 /* Maximum allowed number of control mappings per device */
58 #define UVC_MAX_CONTROL_MAPPINGS 1024
59 #define UVC_MAX_CONTROL_MENU_ENTRIES 32
60
61 /* Devices quirks */
62 #define UVC_QUIRK_STATUS_INTERVAL 0x00000001
63 #define UVC_QUIRK_PROBE_MINMAX 0x00000002
64 #define UVC_QUIRK_PROBE_EXTRAFIELDS 0x00000004
65 #define UVC_QUIRK_BUILTIN_ISIGHT 0x00000008
66 #define UVC_QUIRK_STREAM_NO_FID 0x00000010
67 #define UVC_QUIRK_IGNORE_SELECTOR_UNIT 0x00000020
68 #define UVC_QUIRK_FIX_BANDWIDTH 0x00000080
69 #define UVC_QUIRK_PROBE_DEF 0x00000100
70 #define UVC_QUIRK_RESTRICT_FRAME_RATE 0x00000200
71 #define UVC_QUIRK_RESTORE_CTRLS_ON_INIT 0x00000400
72 #define UVC_QUIRK_FORCE_Y8 0x00000800
73 #define UVC_QUIRK_FORCE_BPP 0x00001000
74 #define UVC_QUIRK_WAKE_AUTOSUSPEND 0x00002000
75
76 /* Format flags */
77 #define UVC_FMT_FLAG_COMPRESSED 0x00000001
78 #define UVC_FMT_FLAG_STREAM 0x00000002
79
80 /* ------------------------------------------------------------------------
81 * Structures.
82 */
83
84 struct uvc_device;
85
86 /* TODO: Put the most frequently accessed fields at the beginning of
87 * structures to maximize cache efficiency.
88 */
89 struct uvc_control_info {
90 struct list_head mappings;
91
92 u8 entity[16];
93 u8 index; /* Bit index in bmControls */
94 u8 selector;
95
96 u16 size;
97 u32 flags;
98 };
99
100 struct uvc_control_mapping {
101 struct list_head list;
102 struct list_head ev_subs;
103
104 u32 id;
105 u8 name[32];
106 u8 entity[16];
107 u8 selector;
108
109 u8 size;
110 u8 offset;
111 enum v4l2_ctrl_type v4l2_type;
112 u32 data_type;
113
114 const struct uvc_menu_info *menu_info;
115 u32 menu_count;
116
117 u32 master_id;
118 s32 master_manual;
119 u32 slave_ids[2];
120
121 s32 (*get)(struct uvc_control_mapping *mapping, u8 query,
122 const u8 *data);
123 void (*set)(struct uvc_control_mapping *mapping, s32 value,
124 u8 *data);
125 };
126
127 struct uvc_control {
128 struct uvc_entity *entity;
129 struct uvc_control_info info;
130
131 u8 index; /* Used to match the uvc_control entry with a
132 uvc_control_info. */
133 u8 dirty:1,
134 loaded:1,
135 modified:1,
136 cached:1,
137 initialized:1;
138
139 u8 *uvc_data;
140
141 struct uvc_fh *handle; /* File handle that last changed the control. */
142 };
143
144 /*
145 * The term 'entity' refers to both UVC units and UVC terminals.
146 *
147 * The type field is either the terminal type (wTerminalType in the terminal
148 * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor).
149 * As the bDescriptorSubtype field is one byte long, the type value will
150 * always have a null MSB for units. All terminal types defined by the UVC
151 * specification have a non-null MSB, so it is safe to use the MSB to
152 * differentiate between units and terminals as long as the descriptor parsing
153 * code makes sure terminal types have a non-null MSB.
154 *
155 * For terminals, the type's most significant bit stores the terminal
156 * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should
157 * always be accessed with the UVC_ENTITY_* macros and never directly.
158 */
159
160 #define UVC_ENTITY_FLAG_DEFAULT (1 << 0)
161
162 struct uvc_entity {
163 struct list_head list; /* Entity as part of a UVC device. */
164 struct list_head chain; /* Entity as part of a video device
165 * chain. */
166 unsigned int flags;
167
168 u8 id;
169 u16 type;
170 char name[64];
171
172 /* Media controller-related fields. */
173 struct video_device *vdev;
174 struct v4l2_subdev subdev;
175 unsigned int num_pads;
176 unsigned int num_links;
177 struct media_pad *pads;
178
179 union {
180 struct {
181 u16 wObjectiveFocalLengthMin;
182 u16 wObjectiveFocalLengthMax;
183 u16 wOcularFocalLength;
184 u8 bControlSize;
185 u8 *bmControls;
186 } camera;
187
188 struct {
189 u8 bControlSize;
190 u8 *bmControls;
191 u8 bTransportModeSize;
192 u8 *bmTransportModes;
193 } media;
194
195 struct {
196 } output;
197
198 struct {
199 u16 wMaxMultiplier;
200 u8 bControlSize;
201 u8 *bmControls;
202 u8 bmVideoStandards;
203 } processing;
204
205 struct {
206 } selector;
207
208 struct {
209 u8 guidExtensionCode[16];
210 u8 bNumControls;
211 u8 bControlSize;
212 u8 *bmControls;
213 u8 *bmControlsType;
214 } extension;
215 };
216
217 u8 bNrInPins;
218 u8 *baSourceID;
219
220 unsigned int ncontrols;
221 struct uvc_control *controls;
222 };
223
224 struct uvc_frame {
225 u8 bFrameIndex;
226 u8 bmCapabilities;
227 u16 wWidth;
228 u16 wHeight;
229 u32 dwMinBitRate;
230 u32 dwMaxBitRate;
231 u32 dwMaxVideoFrameBufferSize;
232 u8 bFrameIntervalType;
233 u32 dwDefaultFrameInterval;
234 u32 *dwFrameInterval;
235 };
236
237 struct uvc_format {
238 u8 type;
239 u8 index;
240 u8 bpp;
241 enum v4l2_colorspace colorspace;
242 enum v4l2_xfer_func xfer_func;
243 enum v4l2_ycbcr_encoding ycbcr_enc;
244 u32 fcc;
245 u32 flags;
246
247 char name[32];
248
249 unsigned int nframes;
250 struct uvc_frame *frame;
251 };
252
253 struct uvc_streaming_header {
254 u8 bNumFormats;
255 u8 bEndpointAddress;
256 u8 bTerminalLink;
257 u8 bControlSize;
258 u8 *bmaControls;
259 /* The following fields are used by input headers only. */
260 u8 bmInfo;
261 u8 bStillCaptureMethod;
262 u8 bTriggerSupport;
263 u8 bTriggerUsage;
264 };
265
266 enum uvc_buffer_state {
267 UVC_BUF_STATE_IDLE = 0,
268 UVC_BUF_STATE_QUEUED = 1,
269 UVC_BUF_STATE_ACTIVE = 2,
270 UVC_BUF_STATE_READY = 3,
271 UVC_BUF_STATE_DONE = 4,
272 UVC_BUF_STATE_ERROR = 5,
273 };
274
275 struct uvc_buffer {
276 struct vb2_v4l2_buffer buf;
277 struct list_head queue;
278
279 enum uvc_buffer_state state;
280 unsigned int error;
281
282 void *mem;
283 unsigned int length;
284 unsigned int bytesused;
285
286 u32 pts;
287
288 /* Asynchronous buffer handling. */
289 struct kref ref;
290 };
291
292 #define UVC_QUEUE_DISCONNECTED (1 << 0)
293 #define UVC_QUEUE_DROP_CORRUPTED (1 << 1)
294
295 struct uvc_video_queue {
296 struct vb2_queue queue;
297 struct mutex mutex; /* Protects queue */
298
299 unsigned int flags;
300 unsigned int buf_used;
301
302 spinlock_t irqlock; /* Protects irqqueue */
303 struct list_head irqqueue;
304 };
305
306 struct uvc_video_chain {
307 struct uvc_device *dev;
308 struct list_head list;
309
310 struct list_head entities; /* All entities */
311 struct uvc_entity *processing; /* Processing unit */
312 struct uvc_entity *selector; /* Selector unit */
313
314 struct mutex ctrl_mutex; /* Protects ctrl.info */
315
316 struct v4l2_prio_state prio; /* V4L2 priority state */
317 u32 caps; /* V4L2 chain-wide caps */
318 };
319
320 struct uvc_stats_frame {
321 unsigned int size; /* Number of bytes captured */
322 unsigned int first_data; /* Index of the first non-empty packet */
323
324 unsigned int nb_packets; /* Number of packets */
325 unsigned int nb_empty; /* Number of empty packets */
326 unsigned int nb_invalid; /* Number of packets with an invalid header */
327 unsigned int nb_errors; /* Number of packets with the error bit set */
328
329 unsigned int nb_pts; /* Number of packets with a PTS timestamp */
330 unsigned int nb_pts_diffs; /* Number of PTS differences inside a frame */
331 unsigned int last_pts_diff; /* Index of the last PTS difference */
332 bool has_initial_pts; /* Whether the first non-empty packet has a PTS */
333 bool has_early_pts; /* Whether a PTS is present before the first non-empty packet */
334 u32 pts; /* PTS of the last packet */
335
336 unsigned int nb_scr; /* Number of packets with a SCR timestamp */
337 unsigned int nb_scr_diffs; /* Number of SCR.STC differences inside a frame */
338 u16 scr_sof; /* SCR.SOF of the last packet */
339 u32 scr_stc; /* SCR.STC of the last packet */
340 };
341
342 struct uvc_stats_stream {
343 ktime_t start_ts; /* Stream start timestamp */
344 ktime_t stop_ts; /* Stream stop timestamp */
345
346 unsigned int nb_frames; /* Number of frames */
347
348 unsigned int nb_packets; /* Number of packets */
349 unsigned int nb_empty; /* Number of empty packets */
350 unsigned int nb_invalid; /* Number of packets with an invalid header */
351 unsigned int nb_errors; /* Number of packets with the error bit set */
352
353 unsigned int nb_pts_constant; /* Number of frames with constant PTS */
354 unsigned int nb_pts_early; /* Number of frames with early PTS */
355 unsigned int nb_pts_initial; /* Number of frames with initial PTS */
356
357 unsigned int nb_scr_count_ok; /* Number of frames with at least one SCR per non empty packet */
358 unsigned int nb_scr_diffs_ok; /* Number of frames with varying SCR.STC */
359 unsigned int scr_sof_count; /* STC.SOF counter accumulated since stream start */
360 unsigned int scr_sof; /* STC.SOF of the last packet */
361 unsigned int min_sof; /* Minimum STC.SOF value */
362 unsigned int max_sof; /* Maximum STC.SOF value */
363 };
364
365 #define UVC_METADATA_BUF_SIZE 1024
366
367 /**
368 * struct uvc_copy_op: Context structure to schedule asynchronous memcpy
369 *
370 * @buf: active buf object for this operation
371 * @dst: copy destination address
372 * @src: copy source address
373 * @len: copy length
374 */
375 struct uvc_copy_op {
376 struct uvc_buffer *buf;
377 void *dst;
378 const __u8 *src;
379 size_t len;
380 };
381
382 /**
383 * struct uvc_urb - URB context management structure
384 *
385 * @urb: the URB described by this context structure
386 * @stream: UVC streaming context
387 * @buffer: memory storage for the URB
388 * @dma: DMA coherent addressing for the urb_buffer
389 * @async_operations: counter to indicate the number of copy operations
390 * @copy_operations: work descriptors for asynchronous copy operations
391 * @work: work queue entry for asynchronous decode
392 */
393 struct uvc_urb {
394 struct urb *urb;
395 struct uvc_streaming *stream;
396
397 char *buffer;
398 dma_addr_t dma;
399
400 unsigned int async_operations;
401 struct uvc_copy_op copy_operations[UVC_MAX_PACKETS];
402 struct work_struct work;
403 };
404
405 struct uvc_streaming {
406 struct list_head list;
407 struct uvc_device *dev;
408 struct video_device vdev;
409 struct uvc_video_chain *chain;
410 atomic_t active;
411
412 struct usb_interface *intf;
413 int intfnum;
414 u16 maxpsize;
415
416 struct uvc_streaming_header header;
417 enum v4l2_buf_type type;
418
419 unsigned int nformats;
420 struct uvc_format *format;
421
422 struct uvc_streaming_control ctrl;
423 struct uvc_format *def_format;
424 struct uvc_format *cur_format;
425 struct uvc_frame *cur_frame;
426
427 /* Protect access to ctrl, cur_format, cur_frame and hardware video
428 * probe control.
429 */
430 struct mutex mutex;
431
432 /* Buffers queue. */
433 unsigned int frozen : 1;
434 struct uvc_video_queue queue;
435 struct workqueue_struct *async_wq;
436 void (*decode)(struct uvc_urb *uvc_urb, struct uvc_buffer *buf,
437 struct uvc_buffer *meta_buf);
438
439 struct {
440 struct video_device vdev;
441 struct uvc_video_queue queue;
442 u32 format;
443 } meta;
444
445 /* Context data used by the bulk completion handler. */
446 struct {
447 u8 header[256];
448 unsigned int header_size;
449 int skip_payload;
450 u32 payload_size;
451 u32 max_payload_size;
452 } bulk;
453
454 struct uvc_urb uvc_urb[UVC_URBS];
455 unsigned int urb_size;
456
457 u32 sequence;
458 u8 last_fid;
459
460 /* debugfs */
461 struct dentry *debugfs_dir;
462 struct {
463 struct uvc_stats_frame frame;
464 struct uvc_stats_stream stream;
465 } stats;
466
467 /* Timestamps support. */
468 struct uvc_clock {
469 struct uvc_clock_sample {
470 u32 dev_stc;
471 u16 dev_sof;
472 u16 host_sof;
473 ktime_t host_time;
474 } *samples;
475
476 unsigned int head;
477 unsigned int count;
478 unsigned int size;
479
480 u16 last_sof;
481 u16 sof_offset;
482
483 u8 last_scr[6];
484
485 spinlock_t lock;
486 } clock;
487 };
488
489 #define for_each_uvc_urb(uvc_urb, uvc_streaming) \
490 for ((uvc_urb) = &(uvc_streaming)->uvc_urb[0]; \
491 (uvc_urb) < &(uvc_streaming)->uvc_urb[UVC_URBS]; \
492 ++(uvc_urb))
493
uvc_urb_index(const struct uvc_urb * uvc_urb)494 static inline u32 uvc_urb_index(const struct uvc_urb *uvc_urb)
495 {
496 return uvc_urb - &uvc_urb->stream->uvc_urb[0];
497 }
498
499 struct uvc_device_info {
500 u32 quirks;
501 u32 meta_format;
502 };
503
504 struct uvc_device {
505 struct usb_device *udev;
506 struct usb_interface *intf;
507 unsigned long warnings;
508 u32 quirks;
509 int intfnum;
510 char name[32];
511
512 const struct uvc_device_info *info;
513
514 struct mutex lock; /* Protects users */
515 unsigned int users;
516 atomic_t nmappings;
517
518 /* Video control interface */
519 #ifdef CONFIG_MEDIA_CONTROLLER
520 struct media_device mdev;
521 #endif
522 struct v4l2_device vdev;
523 u16 uvc_version;
524 u32 clock_frequency;
525
526 struct list_head entities;
527 struct list_head chains;
528
529 /* Video Streaming interfaces */
530 struct list_head streams;
531 struct kref ref;
532
533 /* Status Interrupt Endpoint */
534 struct usb_host_endpoint *int_ep;
535 struct urb *int_urb;
536 bool flush_status;
537 u8 *status;
538 struct input_dev *input;
539 char input_phys[64];
540
541 struct uvc_ctrl_work {
542 struct work_struct work;
543 struct urb *urb;
544 struct uvc_video_chain *chain;
545 struct uvc_control *ctrl;
546 const void *data;
547 } async_ctrl;
548 };
549
550 enum uvc_handle_state {
551 UVC_HANDLE_PASSIVE = 0,
552 UVC_HANDLE_ACTIVE = 1,
553 };
554
555 struct uvc_fh {
556 struct v4l2_fh vfh;
557 struct uvc_video_chain *chain;
558 struct uvc_streaming *stream;
559 enum uvc_handle_state state;
560 };
561
562 struct uvc_driver {
563 struct usb_driver driver;
564 };
565
566 /* ------------------------------------------------------------------------
567 * Debugging, printing and logging
568 */
569
570 #define UVC_TRACE_PROBE (1 << 0)
571 #define UVC_TRACE_DESCR (1 << 1)
572 #define UVC_TRACE_CONTROL (1 << 2)
573 #define UVC_TRACE_FORMAT (1 << 3)
574 #define UVC_TRACE_CAPTURE (1 << 4)
575 #define UVC_TRACE_CALLS (1 << 5)
576 #define UVC_TRACE_FRAME (1 << 7)
577 #define UVC_TRACE_SUSPEND (1 << 8)
578 #define UVC_TRACE_STATUS (1 << 9)
579 #define UVC_TRACE_VIDEO (1 << 10)
580 #define UVC_TRACE_STATS (1 << 11)
581 #define UVC_TRACE_CLOCK (1 << 12)
582
583 #define UVC_WARN_MINMAX 0
584 #define UVC_WARN_PROBE_DEF 1
585 #define UVC_WARN_XU_GET_RES 2
586
587 extern unsigned int uvc_clock_param;
588 extern unsigned int uvc_no_drop_param;
589 extern unsigned int uvc_trace_param;
590 extern unsigned int uvc_timeout_param;
591 extern unsigned int uvc_hw_timestamps_param;
592
593 #define uvc_trace(flag, msg...) \
594 do { \
595 if (uvc_trace_param & flag) \
596 printk(KERN_DEBUG "uvcvideo: " msg); \
597 } while (0)
598
599 #define uvc_warn_once(dev, warn, msg...) \
600 do { \
601 if (!test_and_set_bit(warn, &dev->warnings)) \
602 printk(KERN_INFO "uvcvideo: " msg); \
603 } while (0)
604
605 #define uvc_printk(level, msg...) \
606 printk(level "uvcvideo: " msg)
607
608 /* --------------------------------------------------------------------------
609 * Internal functions.
610 */
611
612 /* Core driver */
613 extern struct uvc_driver uvc_driver;
614
615 struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id);
616
617 /* Video buffers queue management. */
618 int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
619 int drop_corrupted);
620 void uvc_queue_release(struct uvc_video_queue *queue);
621 int uvc_request_buffers(struct uvc_video_queue *queue,
622 struct v4l2_requestbuffers *rb);
623 int uvc_query_buffer(struct uvc_video_queue *queue,
624 struct v4l2_buffer *v4l2_buf);
625 int uvc_create_buffers(struct uvc_video_queue *queue,
626 struct v4l2_create_buffers *v4l2_cb);
627 int uvc_queue_buffer(struct uvc_video_queue *queue,
628 struct media_device *mdev,
629 struct v4l2_buffer *v4l2_buf);
630 int uvc_export_buffer(struct uvc_video_queue *queue,
631 struct v4l2_exportbuffer *exp);
632 int uvc_dequeue_buffer(struct uvc_video_queue *queue,
633 struct v4l2_buffer *v4l2_buf, int nonblocking);
634 int uvc_queue_streamon(struct uvc_video_queue *queue, enum v4l2_buf_type type);
635 int uvc_queue_streamoff(struct uvc_video_queue *queue, enum v4l2_buf_type type);
636 void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
637 struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
638 struct uvc_buffer *buf);
639 struct uvc_buffer *uvc_queue_get_current_buffer(struct uvc_video_queue *queue);
640 void uvc_queue_buffer_release(struct uvc_buffer *buf);
641 int uvc_queue_mmap(struct uvc_video_queue *queue,
642 struct vm_area_struct *vma);
643 __poll_t uvc_queue_poll(struct uvc_video_queue *queue, struct file *file,
644 poll_table *wait);
645 #ifndef CONFIG_MMU
646 unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
647 unsigned long pgoff);
648 #endif
649 int uvc_queue_allocated(struct uvc_video_queue *queue);
uvc_queue_streaming(struct uvc_video_queue * queue)650 static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
651 {
652 return vb2_is_streaming(&queue->queue);
653 }
654
655 /* V4L2 interface */
656 extern const struct v4l2_ioctl_ops uvc_ioctl_ops;
657 extern const struct v4l2_file_operations uvc_fops;
658
659 /* Media controller */
660 int uvc_mc_register_entities(struct uvc_video_chain *chain);
661 void uvc_mc_cleanup_entity(struct uvc_entity *entity);
662
663 /* Video */
664 int uvc_video_init(struct uvc_streaming *stream);
665 int uvc_video_suspend(struct uvc_streaming *stream);
666 int uvc_video_resume(struct uvc_streaming *stream, int reset);
667 int uvc_video_start_streaming(struct uvc_streaming *stream);
668 void uvc_video_stop_streaming(struct uvc_streaming *stream);
669 int uvc_probe_video(struct uvc_streaming *stream,
670 struct uvc_streaming_control *probe);
671 int uvc_query_ctrl(struct uvc_device *dev, u8 query, u8 unit,
672 u8 intfnum, u8 cs, void *data, u16 size);
673 void uvc_video_clock_update(struct uvc_streaming *stream,
674 struct vb2_v4l2_buffer *vbuf,
675 struct uvc_buffer *buf);
676 int uvc_meta_register(struct uvc_streaming *stream);
677
678 int uvc_register_video_device(struct uvc_device *dev,
679 struct uvc_streaming *stream,
680 struct video_device *vdev,
681 struct uvc_video_queue *queue,
682 enum v4l2_buf_type type,
683 const struct v4l2_file_operations *fops,
684 const struct v4l2_ioctl_ops *ioctl_ops);
685
686 /* Status */
687 int uvc_status_init(struct uvc_device *dev);
688 void uvc_status_unregister(struct uvc_device *dev);
689 void uvc_status_cleanup(struct uvc_device *dev);
690 int uvc_status_start(struct uvc_device *dev, gfp_t flags);
691 void uvc_status_stop(struct uvc_device *dev);
692
693 /* Controls */
694 extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops;
695
696 int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
697 struct v4l2_queryctrl *v4l2_ctrl);
698 int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
699 struct v4l2_querymenu *query_menu);
700
701 int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
702 const struct uvc_control_mapping *mapping);
703 int uvc_ctrl_init_device(struct uvc_device *dev);
704 void uvc_ctrl_cleanup_device(struct uvc_device *dev);
705 int uvc_ctrl_restore_values(struct uvc_device *dev);
706 bool uvc_ctrl_status_event_async(struct urb *urb, struct uvc_video_chain *chain,
707 struct uvc_control *ctrl, const u8 *data);
708 void uvc_ctrl_status_event(struct uvc_video_chain *chain,
709 struct uvc_control *ctrl, const u8 *data);
710
711 int uvc_ctrl_begin(struct uvc_video_chain *chain);
712 int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback,
713 const struct v4l2_ext_control *xctrls,
714 unsigned int xctrls_count);
uvc_ctrl_commit(struct uvc_fh * handle,const struct v4l2_ext_control * xctrls,unsigned int xctrls_count)715 static inline int uvc_ctrl_commit(struct uvc_fh *handle,
716 const struct v4l2_ext_control *xctrls,
717 unsigned int xctrls_count)
718 {
719 return __uvc_ctrl_commit(handle, 0, xctrls, xctrls_count);
720 }
uvc_ctrl_rollback(struct uvc_fh * handle)721 static inline int uvc_ctrl_rollback(struct uvc_fh *handle)
722 {
723 return __uvc_ctrl_commit(handle, 1, NULL, 0);
724 }
725
726 int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl);
727 int uvc_ctrl_set(struct uvc_fh *handle, struct v4l2_ext_control *xctrl);
728
729 int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
730 struct uvc_xu_control_query *xqry);
731
732 /* Utility functions */
733 struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts,
734 u8 epaddr);
735
736 /* Quirks support */
737 void uvc_video_decode_isight(struct uvc_urb *uvc_urb,
738 struct uvc_buffer *buf,
739 struct uvc_buffer *meta_buf);
740
741 /* debugfs and statistics */
742 void uvc_debugfs_init(void);
743 void uvc_debugfs_cleanup(void);
744 void uvc_debugfs_init_stream(struct uvc_streaming *stream);
745 void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream);
746
747 size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf,
748 size_t size);
749
750 #endif
751