1#ifndef _USB_VIDEO_H_
2#define _USB_VIDEO_H_
3
4#ifndef __KERNEL__
5#error "The uvcvideo.h header is deprecated, use linux/uvcvideo.h instead."
6#endif
7
8#include <linux/kernel.h>
9#include <linux/poll.h>
10#include <linux/usb.h>
11#include <linux/usb/video.h>
12#include <linux/uvcvideo.h>
13#include <linux/videodev2.h>
14#include <media/media-device.h>
15#include <media/v4l2-device.h>
16#include <media/v4l2-event.h>
17#include <media/v4l2-fh.h>
18#include <media/videobuf2-core.h>
19
20
21
22
23
24#define UVC_TERM_INPUT 0x0000
25#define UVC_TERM_OUTPUT 0x8000
26#define UVC_TERM_DIRECTION(term) ((term)->type & 0x8000)
27
28#define UVC_ENTITY_TYPE(entity) ((entity)->type & 0x7fff)
29#define UVC_ENTITY_IS_UNIT(entity) (((entity)->type & 0xff00) == 0)
30#define UVC_ENTITY_IS_TERM(entity) (((entity)->type & 0xff00) != 0)
31#define UVC_ENTITY_IS_ITERM(entity) \
32 (UVC_ENTITY_IS_TERM(entity) && \
33 ((entity)->type & 0x8000) == UVC_TERM_INPUT)
34#define UVC_ENTITY_IS_OTERM(entity) \
35 (UVC_ENTITY_IS_TERM(entity) && \
36 ((entity)->type & 0x8000) == UVC_TERM_OUTPUT)
37
38
39
40
41
42#define UVC_GUID_UVC_CAMERA \
43 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
44 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}
45#define UVC_GUID_UVC_OUTPUT \
46 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
47 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}
48#define UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT \
49 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
50 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03}
51#define UVC_GUID_UVC_PROCESSING \
52 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
53 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01}
54#define UVC_GUID_UVC_SELECTOR \
55 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
56 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02}
57
58#define UVC_GUID_FORMAT_MJPEG \
59 { 'M', 'J', 'P', 'G', 0x00, 0x00, 0x10, 0x00, \
60 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
61#define UVC_GUID_FORMAT_YUY2 \
62 { 'Y', 'U', 'Y', '2', 0x00, 0x00, 0x10, 0x00, \
63 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
64#define UVC_GUID_FORMAT_YUY2_ISIGHT \
65 { 'Y', 'U', 'Y', '2', 0x00, 0x00, 0x10, 0x00, \
66 0x80, 0x00, 0x00, 0x00, 0x00, 0x38, 0x9b, 0x71}
67#define UVC_GUID_FORMAT_NV12 \
68 { 'N', 'V', '1', '2', 0x00, 0x00, 0x10, 0x00, \
69 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
70#define UVC_GUID_FORMAT_YV12 \
71 { 'Y', 'V', '1', '2', 0x00, 0x00, 0x10, 0x00, \
72 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
73#define UVC_GUID_FORMAT_I420 \
74 { 'I', '4', '2', '0', 0x00, 0x00, 0x10, 0x00, \
75 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
76#define UVC_GUID_FORMAT_UYVY \
77 { 'U', 'Y', 'V', 'Y', 0x00, 0x00, 0x10, 0x00, \
78 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
79#define UVC_GUID_FORMAT_Y800 \
80 { 'Y', '8', '0', '0', 0x00, 0x00, 0x10, 0x00, \
81 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
82#define UVC_GUID_FORMAT_Y8 \
83 { 'Y', '8', ' ', ' ', 0x00, 0x00, 0x10, 0x00, \
84 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
85#define UVC_GUID_FORMAT_Y10 \
86 { 'Y', '1', '0', ' ', 0x00, 0x00, 0x10, 0x00, \
87 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
88#define UVC_GUID_FORMAT_Y12 \
89 { 'Y', '1', '2', ' ', 0x00, 0x00, 0x10, 0x00, \
90 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
91#define UVC_GUID_FORMAT_Y16 \
92 { 'Y', '1', '6', ' ', 0x00, 0x00, 0x10, 0x00, \
93 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
94#define UVC_GUID_FORMAT_BY8 \
95 { 'B', 'Y', '8', ' ', 0x00, 0x00, 0x10, 0x00, \
96 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
97#define UVC_GUID_FORMAT_BA81 \
98 { 'B', 'A', '8', '1', 0x00, 0x00, 0x10, 0x00, \
99 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
100#define UVC_GUID_FORMAT_GBRG \
101 { 'G', 'B', 'R', 'G', 0x00, 0x00, 0x10, 0x00, \
102 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
103#define UVC_GUID_FORMAT_GRBG \
104 { 'G', 'R', 'B', 'G', 0x00, 0x00, 0x10, 0x00, \
105 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
106#define UVC_GUID_FORMAT_RGGB \
107 { 'R', 'G', 'G', 'B', 0x00, 0x00, 0x10, 0x00, \
108 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
109#define UVC_GUID_FORMAT_RGBP \
110 { 'R', 'G', 'B', 'P', 0x00, 0x00, 0x10, 0x00, \
111 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
112#define UVC_GUID_FORMAT_M420 \
113 { 'M', '4', '2', '0', 0x00, 0x00, 0x10, 0x00, \
114 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
115
116#define UVC_GUID_FORMAT_H264 \
117 { 'H', '2', '6', '4', 0x00, 0x00, 0x10, 0x00, \
118 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
119
120
121
122
123
124#define DRIVER_VERSION "1.1.1"
125
126
127#define UVC_URBS 5
128
129#define UVC_MAX_PACKETS 32
130
131#define UVC_MAX_STATUS_SIZE 16
132
133#define UVC_CTRL_CONTROL_TIMEOUT 300
134#define UVC_CTRL_STREAMING_TIMEOUT 5000
135
136
137#define UVC_MAX_CONTROL_MAPPINGS 1024
138#define UVC_MAX_CONTROL_MENU_ENTRIES 32
139
140
141#define UVC_QUIRK_STATUS_INTERVAL 0x00000001
142#define UVC_QUIRK_PROBE_MINMAX 0x00000002
143#define UVC_QUIRK_PROBE_EXTRAFIELDS 0x00000004
144#define UVC_QUIRK_BUILTIN_ISIGHT 0x00000008
145#define UVC_QUIRK_STREAM_NO_FID 0x00000010
146#define UVC_QUIRK_IGNORE_SELECTOR_UNIT 0x00000020
147#define UVC_QUIRK_FIX_BANDWIDTH 0x00000080
148#define UVC_QUIRK_PROBE_DEF 0x00000100
149#define UVC_QUIRK_RESTRICT_FRAME_RATE 0x00000200
150#define UVC_QUIRK_RESTORE_CTRLS_ON_INIT 0x00000400
151#define UVC_QUIRK_FORCE_Y8 0x00000800
152
153
154#define UVC_FMT_FLAG_COMPRESSED 0x00000001
155#define UVC_FMT_FLAG_STREAM 0x00000002
156
157
158
159
160
161struct uvc_device;
162
163
164
165
166struct uvc_control_info {
167 struct list_head mappings;
168
169 __u8 entity[16];
170 __u8 index;
171 __u8 selector;
172
173 __u16 size;
174 __u32 flags;
175};
176
177struct uvc_control_mapping {
178 struct list_head list;
179 struct list_head ev_subs;
180
181 __u32 id;
182 __u8 name[32];
183 __u8 entity[16];
184 __u8 selector;
185
186 __u8 size;
187 __u8 offset;
188 enum v4l2_ctrl_type v4l2_type;
189 __u32 data_type;
190
191 struct uvc_menu_info *menu_info;
192 __u32 menu_count;
193
194 __u32 master_id;
195 __s32 master_manual;
196 __u32 slave_ids[2];
197
198 __s32 (*get) (struct uvc_control_mapping *mapping, __u8 query,
199 const __u8 *data);
200 void (*set) (struct uvc_control_mapping *mapping, __s32 value,
201 __u8 *data);
202};
203
204struct uvc_control {
205 struct uvc_entity *entity;
206 struct uvc_control_info info;
207
208 __u8 index;
209
210 __u8 dirty:1,
211 loaded:1,
212 modified:1,
213 cached:1,
214 initialized:1;
215
216 __u8 *uvc_data;
217};
218
219struct uvc_format_desc {
220 char *name;
221 __u8 guid[16];
222 __u32 fcc;
223};
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240#define UVC_ENTITY_FLAG_DEFAULT (1 << 0)
241
242struct uvc_entity {
243 struct list_head list;
244 struct list_head chain;
245
246 unsigned int flags;
247
248 __u8 id;
249 __u16 type;
250 char name[64];
251
252
253 struct video_device *vdev;
254 struct v4l2_subdev subdev;
255 unsigned int num_pads;
256 unsigned int num_links;
257 struct media_pad *pads;
258
259 union {
260 struct {
261 __u16 wObjectiveFocalLengthMin;
262 __u16 wObjectiveFocalLengthMax;
263 __u16 wOcularFocalLength;
264 __u8 bControlSize;
265 __u8 *bmControls;
266 } camera;
267
268 struct {
269 __u8 bControlSize;
270 __u8 *bmControls;
271 __u8 bTransportModeSize;
272 __u8 *bmTransportModes;
273 } media;
274
275 struct {
276 } output;
277
278 struct {
279 __u16 wMaxMultiplier;
280 __u8 bControlSize;
281 __u8 *bmControls;
282 __u8 bmVideoStandards;
283 } processing;
284
285 struct {
286 } selector;
287
288 struct {
289 __u8 guidExtensionCode[16];
290 __u8 bNumControls;
291 __u8 bControlSize;
292 __u8 *bmControls;
293 __u8 *bmControlsType;
294 } extension;
295 };
296
297 __u8 bNrInPins;
298 __u8 *baSourceID;
299
300 unsigned int ncontrols;
301 struct uvc_control *controls;
302};
303
304struct uvc_frame {
305 __u8 bFrameIndex;
306 __u8 bmCapabilities;
307 __u16 wWidth;
308 __u16 wHeight;
309 __u32 dwMinBitRate;
310 __u32 dwMaxBitRate;
311 __u32 dwMaxVideoFrameBufferSize;
312 __u8 bFrameIntervalType;
313 __u32 dwDefaultFrameInterval;
314 __u32 *dwFrameInterval;
315};
316
317struct uvc_format {
318 __u8 type;
319 __u8 index;
320 __u8 bpp;
321 __u8 colorspace;
322 __u32 fcc;
323 __u32 flags;
324
325 char name[32];
326
327 unsigned int nframes;
328 struct uvc_frame *frame;
329};
330
331struct uvc_streaming_header {
332 __u8 bNumFormats;
333 __u8 bEndpointAddress;
334 __u8 bTerminalLink;
335 __u8 bControlSize;
336 __u8 *bmaControls;
337
338 __u8 bmInfo;
339 __u8 bStillCaptureMethod;
340 __u8 bTriggerSupport;
341 __u8 bTriggerUsage;
342};
343
344enum uvc_buffer_state {
345 UVC_BUF_STATE_IDLE = 0,
346 UVC_BUF_STATE_QUEUED = 1,
347 UVC_BUF_STATE_ACTIVE = 2,
348 UVC_BUF_STATE_READY = 3,
349 UVC_BUF_STATE_DONE = 4,
350 UVC_BUF_STATE_ERROR = 5,
351};
352
353struct uvc_buffer {
354 struct vb2_buffer buf;
355 struct list_head queue;
356
357 enum uvc_buffer_state state;
358 unsigned int error;
359
360 void *mem;
361 unsigned int length;
362 unsigned int bytesused;
363
364 u32 pts;
365};
366
367#define UVC_QUEUE_DISCONNECTED (1 << 0)
368#define UVC_QUEUE_DROP_CORRUPTED (1 << 1)
369
370struct uvc_video_queue {
371 struct vb2_queue queue;
372 struct mutex mutex;
373
374 unsigned int flags;
375 unsigned int buf_used;
376
377 spinlock_t irqlock;
378 struct list_head irqqueue;
379};
380
381struct uvc_video_chain {
382 struct uvc_device *dev;
383 struct list_head list;
384
385 struct list_head entities;
386 struct uvc_entity *processing;
387 struct uvc_entity *selector;
388
389 struct mutex ctrl_mutex;
390
391 struct v4l2_prio_state prio;
392 u32 caps;
393};
394
395struct uvc_stats_frame {
396 unsigned int size;
397 unsigned int first_data;
398
399 unsigned int nb_packets;
400 unsigned int nb_empty;
401 unsigned int nb_invalid;
402 unsigned int nb_errors;
403
404 unsigned int nb_pts;
405 unsigned int nb_pts_diffs;
406 unsigned int last_pts_diff;
407 bool has_initial_pts;
408 bool has_early_pts;
409 u32 pts;
410
411 unsigned int nb_scr;
412 unsigned int nb_scr_diffs;
413 u16 scr_sof;
414 u32 scr_stc;
415};
416
417struct uvc_stats_stream {
418 struct timespec start_ts;
419 struct timespec stop_ts;
420
421 unsigned int nb_frames;
422
423 unsigned int nb_packets;
424 unsigned int nb_empty;
425 unsigned int nb_invalid;
426 unsigned int nb_errors;
427
428 unsigned int nb_pts_constant;
429 unsigned int nb_pts_early;
430 unsigned int nb_pts_initial;
431
432 unsigned int nb_scr_count_ok;
433 unsigned int nb_scr_diffs_ok;
434 unsigned int scr_sof_count;
435 unsigned int scr_sof;
436 unsigned int min_sof;
437 unsigned int max_sof;
438};
439
440struct uvc_streaming {
441 struct list_head list;
442 struct uvc_device *dev;
443 struct video_device *vdev;
444 struct uvc_video_chain *chain;
445 atomic_t active;
446
447 struct usb_interface *intf;
448 int intfnum;
449 __u16 maxpsize;
450
451 struct uvc_streaming_header header;
452 enum v4l2_buf_type type;
453
454 unsigned int nformats;
455 struct uvc_format *format;
456
457 struct uvc_streaming_control ctrl;
458 struct uvc_format *def_format;
459 struct uvc_format *cur_format;
460 struct uvc_frame *cur_frame;
461
462
463
464
465 struct mutex mutex;
466
467
468 unsigned int frozen : 1;
469 struct uvc_video_queue queue;
470 void (*decode) (struct urb *urb, struct uvc_streaming *video,
471 struct uvc_buffer *buf);
472
473
474 struct {
475 __u8 header[256];
476 unsigned int header_size;
477 int skip_payload;
478 __u32 payload_size;
479 __u32 max_payload_size;
480 } bulk;
481
482 struct urb *urb[UVC_URBS];
483 char *urb_buffer[UVC_URBS];
484 dma_addr_t urb_dma[UVC_URBS];
485 unsigned int urb_size;
486
487 __u32 sequence;
488 __u8 last_fid;
489
490
491 struct dentry *debugfs_dir;
492 struct {
493 struct uvc_stats_frame frame;
494 struct uvc_stats_stream stream;
495 } stats;
496
497
498 struct uvc_clock {
499 struct uvc_clock_sample {
500 u32 dev_stc;
501 u16 dev_sof;
502 struct timespec host_ts;
503 u16 host_sof;
504 } *samples;
505
506 unsigned int head;
507 unsigned int count;
508 unsigned int size;
509
510 u16 last_sof;
511 u16 sof_offset;
512
513 spinlock_t lock;
514 } clock;
515};
516
517enum uvc_device_state {
518 UVC_DEV_DISCONNECTED = 1,
519};
520
521struct uvc_device {
522 struct usb_device *udev;
523 struct usb_interface *intf;
524 unsigned long warnings;
525 __u32 quirks;
526 int intfnum;
527 char name[32];
528
529 enum uvc_device_state state;
530 struct mutex lock;
531 unsigned int users;
532 atomic_t nmappings;
533
534
535#ifdef CONFIG_MEDIA_CONTROLLER
536 struct media_device mdev;
537#endif
538 struct v4l2_device vdev;
539 __u16 uvc_version;
540 __u32 clock_frequency;
541
542 struct list_head entities;
543 struct list_head chains;
544
545
546 struct list_head streams;
547 atomic_t nstreams;
548
549
550 struct usb_host_endpoint *int_ep;
551 struct urb *int_urb;
552 __u8 *status;
553 struct input_dev *input;
554 char input_phys[64];
555};
556
557enum uvc_handle_state {
558 UVC_HANDLE_PASSIVE = 0,
559 UVC_HANDLE_ACTIVE = 1,
560};
561
562struct uvc_fh {
563 struct v4l2_fh vfh;
564 struct uvc_video_chain *chain;
565 struct uvc_streaming *stream;
566 enum uvc_handle_state state;
567};
568
569struct uvc_driver {
570 struct usb_driver driver;
571};
572
573
574
575
576
577#define UVC_TRACE_PROBE (1 << 0)
578#define UVC_TRACE_DESCR (1 << 1)
579#define UVC_TRACE_CONTROL (1 << 2)
580#define UVC_TRACE_FORMAT (1 << 3)
581#define UVC_TRACE_CAPTURE (1 << 4)
582#define UVC_TRACE_CALLS (1 << 5)
583#define UVC_TRACE_FRAME (1 << 7)
584#define UVC_TRACE_SUSPEND (1 << 8)
585#define UVC_TRACE_STATUS (1 << 9)
586#define UVC_TRACE_VIDEO (1 << 10)
587#define UVC_TRACE_STATS (1 << 11)
588#define UVC_TRACE_CLOCK (1 << 12)
589
590#define UVC_WARN_MINMAX 0
591#define UVC_WARN_PROBE_DEF 1
592#define UVC_WARN_XU_GET_RES 2
593
594extern unsigned int uvc_clock_param;
595extern unsigned int uvc_no_drop_param;
596extern unsigned int uvc_trace_param;
597extern unsigned int uvc_timeout_param;
598
599#define uvc_trace(flag, msg...) \
600 do { \
601 if (uvc_trace_param & flag) \
602 printk(KERN_DEBUG "uvcvideo: " msg); \
603 } while (0)
604
605#define uvc_warn_once(dev, warn, msg...) \
606 do { \
607 if (!test_and_set_bit(warn, &dev->warnings)) \
608 printk(KERN_INFO "uvcvideo: " msg); \
609 } while (0)
610
611#define uvc_printk(level, msg...) \
612 printk(level "uvcvideo: " msg)
613
614
615
616
617
618
619extern struct uvc_driver uvc_driver;
620
621extern struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id);
622
623
624extern int uvc_queue_init(struct uvc_video_queue *queue,
625 enum v4l2_buf_type type, int drop_corrupted);
626extern void uvc_queue_release(struct uvc_video_queue *queue);
627extern int uvc_request_buffers(struct uvc_video_queue *queue,
628 struct v4l2_requestbuffers *rb);
629extern int uvc_query_buffer(struct uvc_video_queue *queue,
630 struct v4l2_buffer *v4l2_buf);
631extern int uvc_create_buffers(struct uvc_video_queue *queue,
632 struct v4l2_create_buffers *v4l2_cb);
633extern int uvc_queue_buffer(struct uvc_video_queue *queue,
634 struct v4l2_buffer *v4l2_buf);
635extern int uvc_dequeue_buffer(struct uvc_video_queue *queue,
636 struct v4l2_buffer *v4l2_buf, int nonblocking);
637extern int uvc_queue_streamon(struct uvc_video_queue *queue,
638 enum v4l2_buf_type type);
639extern int uvc_queue_streamoff(struct uvc_video_queue *queue,
640 enum v4l2_buf_type type);
641extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
642extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
643 struct uvc_buffer *buf);
644extern int uvc_queue_mmap(struct uvc_video_queue *queue,
645 struct vm_area_struct *vma);
646extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue,
647 struct file *file, poll_table *wait);
648#ifndef CONFIG_MMU
649extern unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
650 unsigned long pgoff);
651#endif
652extern int uvc_queue_allocated(struct uvc_video_queue *queue);
653static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
654{
655 return vb2_is_streaming(&queue->queue);
656}
657
658
659extern const struct v4l2_ioctl_ops uvc_ioctl_ops;
660extern const struct v4l2_file_operations uvc_fops;
661
662
663extern int uvc_mc_register_entities(struct uvc_video_chain *chain);
664extern void uvc_mc_cleanup_entity(struct uvc_entity *entity);
665
666
667extern int uvc_video_init(struct uvc_streaming *stream);
668extern int uvc_video_suspend(struct uvc_streaming *stream);
669extern int uvc_video_resume(struct uvc_streaming *stream, int reset);
670extern int uvc_video_enable(struct uvc_streaming *stream, int enable);
671extern int uvc_probe_video(struct uvc_streaming *stream,
672 struct uvc_streaming_control *probe);
673extern int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit,
674 __u8 intfnum, __u8 cs, void *data, __u16 size);
675void uvc_video_clock_update(struct uvc_streaming *stream,
676 struct v4l2_buffer *v4l2_buf,
677 struct uvc_buffer *buf);
678
679
680extern int uvc_status_init(struct uvc_device *dev);
681extern void uvc_status_cleanup(struct uvc_device *dev);
682extern int uvc_status_start(struct uvc_device *dev, gfp_t flags);
683extern void uvc_status_stop(struct uvc_device *dev);
684
685
686extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops;
687
688extern int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
689 struct v4l2_queryctrl *v4l2_ctrl);
690extern int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
691 struct v4l2_querymenu *query_menu);
692
693extern int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
694 const struct uvc_control_mapping *mapping);
695extern int uvc_ctrl_init_device(struct uvc_device *dev);
696extern void uvc_ctrl_cleanup_device(struct uvc_device *dev);
697extern int uvc_ctrl_restore_values(struct uvc_device *dev);
698
699extern int uvc_ctrl_begin(struct uvc_video_chain *chain);
700extern int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback,
701 const struct v4l2_ext_control *xctrls,
702 unsigned int xctrls_count);
703static inline int uvc_ctrl_commit(struct uvc_fh *handle,
704 const struct v4l2_ext_control *xctrls,
705 unsigned int xctrls_count)
706{
707 return __uvc_ctrl_commit(handle, 0, xctrls, xctrls_count);
708}
709static inline int uvc_ctrl_rollback(struct uvc_fh *handle)
710{
711 return __uvc_ctrl_commit(handle, 1, NULL, 0);
712}
713
714extern int uvc_ctrl_get(struct uvc_video_chain *chain,
715 struct v4l2_ext_control *xctrl);
716extern int uvc_ctrl_set(struct uvc_video_chain *chain,
717 struct v4l2_ext_control *xctrl);
718
719extern int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
720 struct uvc_xu_control_query *xqry);
721
722
723extern void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
724 unsigned int n_terms, unsigned int threshold);
725extern uint32_t uvc_fraction_to_interval(uint32_t numerator,
726 uint32_t denominator);
727extern struct usb_host_endpoint *uvc_find_endpoint(
728 struct usb_host_interface *alts, __u8 epaddr);
729
730
731void uvc_video_decode_isight(struct urb *urb, struct uvc_streaming *stream,
732 struct uvc_buffer *buf);
733
734
735int uvc_debugfs_init(void);
736void uvc_debugfs_cleanup(void);
737int uvc_debugfs_init_stream(struct uvc_streaming *stream);
738void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream);
739
740size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf,
741 size_t size);
742
743#endif
744
