Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6
[pandora-kernel.git] / drivers / media / video / uvc / uvcvideo.h
1 #ifndef _USB_VIDEO_H_
2 #define _USB_VIDEO_H_
3
4 #include <linux/kernel.h>
5 #include <linux/videodev2.h>
6
7 /*
8  * Dynamic controls
9  */
10
11 /* Data types for UVC control data */
12 #define UVC_CTRL_DATA_TYPE_RAW          0
13 #define UVC_CTRL_DATA_TYPE_SIGNED       1
14 #define UVC_CTRL_DATA_TYPE_UNSIGNED     2
15 #define UVC_CTRL_DATA_TYPE_BOOLEAN      3
16 #define UVC_CTRL_DATA_TYPE_ENUM         4
17 #define UVC_CTRL_DATA_TYPE_BITMASK      5
18
19 /* Control flags */
20 #define UVC_CONTROL_SET_CUR     (1 << 0)
21 #define UVC_CONTROL_GET_CUR     (1 << 1)
22 #define UVC_CONTROL_GET_MIN     (1 << 2)
23 #define UVC_CONTROL_GET_MAX     (1 << 3)
24 #define UVC_CONTROL_GET_RES     (1 << 4)
25 #define UVC_CONTROL_GET_DEF     (1 << 5)
26 /* Control should be saved at suspend and restored at resume. */
27 #define UVC_CONTROL_RESTORE     (1 << 6)
28 /* Control can be updated by the camera. */
29 #define UVC_CONTROL_AUTO_UPDATE (1 << 7)
30
31 #define UVC_CONTROL_GET_RANGE   (UVC_CONTROL_GET_CUR | UVC_CONTROL_GET_MIN | \
32                                  UVC_CONTROL_GET_MAX | UVC_CONTROL_GET_RES | \
33                                  UVC_CONTROL_GET_DEF)
34
35 struct uvc_xu_control_info {
36         __u8 entity[16];
37         __u8 index;
38         __u8 selector;
39         __u16 size;
40         __u32 flags;
41 };
42
43 struct uvc_menu_info {
44         __u32 value;
45         __u8 name[32];
46 };
47
48 struct uvc_xu_control_mapping_old {
49         __u8 reserved[64];
50 };
51
52 struct uvc_xu_control_mapping {
53         __u32 id;
54         __u8 name[32];
55         __u8 entity[16];
56         __u8 selector;
57
58         __u8 size;
59         __u8 offset;
60         enum v4l2_ctrl_type v4l2_type;
61         __u32 data_type;
62
63         struct uvc_menu_info __user *menu_info;
64         __u32 menu_count;
65
66         __u32 reserved[4];
67 };
68
69 struct uvc_xu_control {
70         __u8 unit;
71         __u8 selector;
72         __u16 size;
73         __u8 __user *data;
74 };
75
76 #define UVCIOC_CTRL_ADD         _IOW('U', 1, struct uvc_xu_control_info)
77 #define UVCIOC_CTRL_MAP_OLD     _IOWR('U', 2, struct uvc_xu_control_mapping_old)
78 #define UVCIOC_CTRL_MAP         _IOWR('U', 2, struct uvc_xu_control_mapping)
79 #define UVCIOC_CTRL_GET         _IOWR('U', 3, struct uvc_xu_control)
80 #define UVCIOC_CTRL_SET         _IOW('U', 4, struct uvc_xu_control)
81
82 #ifdef __KERNEL__
83
84 #include <linux/poll.h>
85 #include <linux/usb/video.h>
86
87 /* --------------------------------------------------------------------------
88  * UVC constants
89  */
90
91 #define UVC_TERM_INPUT                  0x0000
92 #define UVC_TERM_OUTPUT                 0x8000
93 #define UVC_TERM_DIRECTION(term)        ((term)->type & 0x8000)
94
95 #define UVC_ENTITY_TYPE(entity)         ((entity)->type & 0x7fff)
96 #define UVC_ENTITY_IS_UNIT(entity)      (((entity)->type & 0xff00) == 0)
97 #define UVC_ENTITY_IS_TERM(entity)      (((entity)->type & 0xff00) != 0)
98 #define UVC_ENTITY_IS_ITERM(entity) \
99         (UVC_ENTITY_IS_TERM(entity) && \
100         ((entity)->type & 0x8000) == UVC_TERM_INPUT)
101 #define UVC_ENTITY_IS_OTERM(entity) \
102         (UVC_ENTITY_IS_TERM(entity) && \
103         ((entity)->type & 0x8000) == UVC_TERM_OUTPUT)
104
105
106 /* ------------------------------------------------------------------------
107  * GUIDs
108  */
109 #define UVC_GUID_UVC_CAMERA \
110         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
111          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}
112 #define UVC_GUID_UVC_OUTPUT \
113         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
114          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}
115 #define UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT \
116         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
117          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03}
118 #define UVC_GUID_UVC_PROCESSING \
119         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
120          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01}
121 #define UVC_GUID_UVC_SELECTOR \
122         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
123          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02}
124
125 #define UVC_GUID_FORMAT_MJPEG \
126         { 'M',  'J',  'P',  'G', 0x00, 0x00, 0x10, 0x00, \
127          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
128 #define UVC_GUID_FORMAT_YUY2 \
129         { 'Y',  'U',  'Y',  '2', 0x00, 0x00, 0x10, 0x00, \
130          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
131 #define UVC_GUID_FORMAT_YUY2_ISIGHT \
132         { 'Y',  'U',  'Y',  '2', 0x00, 0x00, 0x10, 0x00, \
133          0x80, 0x00, 0x00, 0x00, 0x00, 0x38, 0x9b, 0x71}
134 #define UVC_GUID_FORMAT_NV12 \
135         { 'N',  'V',  '1',  '2', 0x00, 0x00, 0x10, 0x00, \
136          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
137 #define UVC_GUID_FORMAT_YV12 \
138         { 'Y',  'V',  '1',  '2', 0x00, 0x00, 0x10, 0x00, \
139          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
140 #define UVC_GUID_FORMAT_I420 \
141         { 'I',  '4',  '2',  '0', 0x00, 0x00, 0x10, 0x00, \
142          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
143 #define UVC_GUID_FORMAT_UYVY \
144         { 'U',  'Y',  'V',  'Y', 0x00, 0x00, 0x10, 0x00, \
145          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
146 #define UVC_GUID_FORMAT_Y800 \
147         { 'Y',  '8',  '0',  '0', 0x00, 0x00, 0x10, 0x00, \
148          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
149 #define UVC_GUID_FORMAT_Y16 \
150         { 'Y',  '1',  '6',  ' ', 0x00, 0x00, 0x10, 0x00, \
151          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
152 #define UVC_GUID_FORMAT_BY8 \
153         { 'B',  'Y',  '8',  ' ', 0x00, 0x00, 0x10, 0x00, \
154          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
155
156 /* ------------------------------------------------------------------------
157  * Driver specific constants.
158  */
159
160 #define DRIVER_VERSION_NUMBER   KERNEL_VERSION(1, 0, 0)
161 #define DRIVER_VERSION          "v1.0.0"
162
163 /* Number of isochronous URBs. */
164 #define UVC_URBS                5
165 /* Maximum number of packets per URB. */
166 #define UVC_MAX_PACKETS         32
167 /* Maximum number of video buffers. */
168 #define UVC_MAX_VIDEO_BUFFERS   32
169 /* Maximum status buffer size in bytes of interrupt URB. */
170 #define UVC_MAX_STATUS_SIZE     16
171
172 #define UVC_CTRL_CONTROL_TIMEOUT        300
173 #define UVC_CTRL_STREAMING_TIMEOUT      5000
174
175 /* Maximum allowed number of control mappings per device */
176 #define UVC_MAX_CONTROL_MAPPINGS        1024
177
178 /* Devices quirks */
179 #define UVC_QUIRK_STATUS_INTERVAL       0x00000001
180 #define UVC_QUIRK_PROBE_MINMAX          0x00000002
181 #define UVC_QUIRK_PROBE_EXTRAFIELDS     0x00000004
182 #define UVC_QUIRK_BUILTIN_ISIGHT        0x00000008
183 #define UVC_QUIRK_STREAM_NO_FID         0x00000010
184 #define UVC_QUIRK_IGNORE_SELECTOR_UNIT  0x00000020
185 #define UVC_QUIRK_FIX_BANDWIDTH         0x00000080
186 #define UVC_QUIRK_PROBE_DEF             0x00000100
187 #define UVC_QUIRK_RESTRICT_FRAME_RATE   0x00000200
188
189 /* Format flags */
190 #define UVC_FMT_FLAG_COMPRESSED         0x00000001
191 #define UVC_FMT_FLAG_STREAM             0x00000002
192
193 /* ------------------------------------------------------------------------
194  * Structures.
195  */
196
197 struct uvc_device;
198
199 /* TODO: Put the most frequently accessed fields at the beginning of
200  * structures to maximize cache efficiency.
201  */
202 struct uvc_control_info {
203         struct list_head mappings;
204
205         __u8 entity[16];
206         __u8 index;     /* Bit index in bmControls */
207         __u8 selector;
208
209         __u16 size;
210         __u32 flags;
211 };
212
213 struct uvc_control_mapping {
214         struct list_head list;
215
216         struct uvc_control_info *ctrl;
217
218         __u32 id;
219         __u8 name[32];
220         __u8 entity[16];
221         __u8 selector;
222
223         __u8 size;
224         __u8 offset;
225         enum v4l2_ctrl_type v4l2_type;
226         __u32 data_type;
227
228         struct uvc_menu_info *menu_info;
229         __u32 menu_count;
230
231         __s32 (*get) (struct uvc_control_mapping *mapping, __u8 query,
232                       const __u8 *data);
233         void (*set) (struct uvc_control_mapping *mapping, __s32 value,
234                      __u8 *data);
235 };
236
237 struct uvc_control {
238         struct uvc_entity *entity;
239         struct uvc_control_info info;
240
241         __u8 index;     /* Used to match the uvc_control entry with a
242                            uvc_control_info. */
243         __u8 dirty:1,
244              loaded:1,
245              modified:1,
246              cached:1,
247              initialized:1;
248
249         __u8 *uvc_data;
250 };
251
252 struct uvc_format_desc {
253         char *name;
254         __u8 guid[16];
255         __u32 fcc;
256 };
257
258 /* The term 'entity' refers to both UVC units and UVC terminals.
259  *
260  * The type field is either the terminal type (wTerminalType in the terminal
261  * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor).
262  * As the bDescriptorSubtype field is one byte long, the type value will
263  * always have a null MSB for units. All terminal types defined by the UVC
264  * specification have a non-null MSB, so it is safe to use the MSB to
265  * differentiate between units and terminals as long as the descriptor parsing
266  * code makes sure terminal types have a non-null MSB.
267  *
268  * For terminals, the type's most significant bit stores the terminal
269  * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should
270  * always be accessed with the UVC_ENTITY_* macros and never directly.
271  */
272
273 struct uvc_entity {
274         struct list_head list;          /* Entity as part of a UVC device. */
275         struct list_head chain;         /* Entity as part of a video device
276                                          * chain. */
277         __u8 id;
278         __u16 type;
279         char name[64];
280
281         union {
282                 struct {
283                         __u16 wObjectiveFocalLengthMin;
284                         __u16 wObjectiveFocalLengthMax;
285                         __u16 wOcularFocalLength;
286                         __u8  bControlSize;
287                         __u8  *bmControls;
288                 } camera;
289
290                 struct {
291                         __u8  bControlSize;
292                         __u8  *bmControls;
293                         __u8  bTransportModeSize;
294                         __u8  *bmTransportModes;
295                 } media;
296
297                 struct {
298                 } output;
299
300                 struct {
301                         __u16 wMaxMultiplier;
302                         __u8  bControlSize;
303                         __u8  *bmControls;
304                         __u8  bmVideoStandards;
305                 } processing;
306
307                 struct {
308                 } selector;
309
310                 struct {
311                         __u8  guidExtensionCode[16];
312                         __u8  bNumControls;
313                         __u8  bControlSize;
314                         __u8  *bmControls;
315                         __u8  *bmControlsType;
316                 } extension;
317         };
318
319         __u8 bNrInPins;
320         __u8 *baSourceID;
321
322         unsigned int ncontrols;
323         struct uvc_control *controls;
324 };
325
326 struct uvc_frame {
327         __u8  bFrameIndex;
328         __u8  bmCapabilities;
329         __u16 wWidth;
330         __u16 wHeight;
331         __u32 dwMinBitRate;
332         __u32 dwMaxBitRate;
333         __u32 dwMaxVideoFrameBufferSize;
334         __u8  bFrameIntervalType;
335         __u32 dwDefaultFrameInterval;
336         __u32 *dwFrameInterval;
337 };
338
339 struct uvc_format {
340         __u8 type;
341         __u8 index;
342         __u8 bpp;
343         __u8 colorspace;
344         __u32 fcc;
345         __u32 flags;
346
347         char name[32];
348
349         unsigned int nframes;
350         struct uvc_frame *frame;
351 };
352
353 struct uvc_streaming_header {
354         __u8 bNumFormats;
355         __u8 bEndpointAddress;
356         __u8 bTerminalLink;
357         __u8 bControlSize;
358         __u8 *bmaControls;
359         /* The following fields are used by input headers only. */
360         __u8 bmInfo;
361         __u8 bStillCaptureMethod;
362         __u8 bTriggerSupport;
363         __u8 bTriggerUsage;
364 };
365
366 enum uvc_buffer_state {
367         UVC_BUF_STATE_IDLE      = 0,
368         UVC_BUF_STATE_QUEUED    = 1,
369         UVC_BUF_STATE_ACTIVE    = 2,
370         UVC_BUF_STATE_READY     = 3,
371         UVC_BUF_STATE_DONE      = 4,
372         UVC_BUF_STATE_ERROR     = 5,
373 };
374
375 struct uvc_buffer {
376         unsigned long vma_use_count;
377         struct list_head stream;
378
379         /* Touched by interrupt handler. */
380         struct v4l2_buffer buf;
381         struct list_head queue;
382         wait_queue_head_t wait;
383         enum uvc_buffer_state state;
384         unsigned int error;
385 };
386
387 #define UVC_QUEUE_STREAMING             (1 << 0)
388 #define UVC_QUEUE_DISCONNECTED          (1 << 1)
389 #define UVC_QUEUE_DROP_CORRUPTED        (1 << 2)
390
391 struct uvc_video_queue {
392         enum v4l2_buf_type type;
393
394         void *mem;
395         unsigned int flags;
396
397         unsigned int count;
398         unsigned int buf_size;
399         unsigned int buf_used;
400         struct uvc_buffer buffer[UVC_MAX_VIDEO_BUFFERS];
401         struct mutex mutex;     /* protects buffers and mainqueue */
402         spinlock_t irqlock;     /* protects irqqueue */
403
404         struct list_head mainqueue;
405         struct list_head irqqueue;
406 };
407
408 struct uvc_video_chain {
409         struct uvc_device *dev;
410         struct list_head list;
411
412         struct list_head entities;              /* All entities */
413         struct uvc_entity *processing;          /* Processing unit */
414         struct uvc_entity *selector;            /* Selector unit */
415
416         struct mutex ctrl_mutex;                /* Protects ctrl.info */
417 };
418
419 struct uvc_streaming {
420         struct list_head list;
421         struct uvc_device *dev;
422         struct video_device *vdev;
423         struct uvc_video_chain *chain;
424         atomic_t active;
425
426         struct usb_interface *intf;
427         int intfnum;
428         __u16 maxpsize;
429
430         struct uvc_streaming_header header;
431         enum v4l2_buf_type type;
432
433         unsigned int nformats;
434         struct uvc_format *format;
435
436         struct uvc_streaming_control ctrl;
437         struct uvc_format *cur_format;
438         struct uvc_frame *cur_frame;
439
440         struct mutex mutex;
441
442         unsigned int frozen : 1;
443         struct uvc_video_queue queue;
444         void (*decode) (struct urb *urb, struct uvc_streaming *video,
445                         struct uvc_buffer *buf);
446
447         /* Context data used by the bulk completion handler. */
448         struct {
449                 __u8 header[256];
450                 unsigned int header_size;
451                 int skip_payload;
452                 __u32 payload_size;
453                 __u32 max_payload_size;
454         } bulk;
455
456         struct urb *urb[UVC_URBS];
457         char *urb_buffer[UVC_URBS];
458         dma_addr_t urb_dma[UVC_URBS];
459         unsigned int urb_size;
460
461         __u32 sequence;
462         __u8 last_fid;
463 };
464
465 enum uvc_device_state {
466         UVC_DEV_DISCONNECTED = 1,
467 };
468
469 struct uvc_device {
470         struct usb_device *udev;
471         struct usb_interface *intf;
472         unsigned long warnings;
473         __u32 quirks;
474         int intfnum;
475         char name[32];
476
477         enum uvc_device_state state;
478         atomic_t users;
479         atomic_t nmappings;
480
481         /* Video control interface */
482         __u16 uvc_version;
483         __u32 clock_frequency;
484
485         struct list_head entities;
486         struct list_head chains;
487
488         /* Video Streaming interfaces */
489         struct list_head streams;
490         atomic_t nstreams;
491
492         /* Status Interrupt Endpoint */
493         struct usb_host_endpoint *int_ep;
494         struct urb *int_urb;
495         __u8 *status;
496         struct input_dev *input;
497         char input_phys[64];
498 };
499
500 enum uvc_handle_state {
501         UVC_HANDLE_PASSIVE      = 0,
502         UVC_HANDLE_ACTIVE       = 1,
503 };
504
505 struct uvc_fh {
506         struct uvc_video_chain *chain;
507         struct uvc_streaming *stream;
508         enum uvc_handle_state state;
509 };
510
511 struct uvc_driver {
512         struct usb_driver driver;
513 };
514
515 /* ------------------------------------------------------------------------
516  * Debugging, printing and logging
517  */
518
519 #define UVC_TRACE_PROBE         (1 << 0)
520 #define UVC_TRACE_DESCR         (1 << 1)
521 #define UVC_TRACE_CONTROL       (1 << 2)
522 #define UVC_TRACE_FORMAT        (1 << 3)
523 #define UVC_TRACE_CAPTURE       (1 << 4)
524 #define UVC_TRACE_CALLS         (1 << 5)
525 #define UVC_TRACE_IOCTL         (1 << 6)
526 #define UVC_TRACE_FRAME         (1 << 7)
527 #define UVC_TRACE_SUSPEND       (1 << 8)
528 #define UVC_TRACE_STATUS        (1 << 9)
529 #define UVC_TRACE_VIDEO         (1 << 10)
530
531 #define UVC_WARN_MINMAX         0
532 #define UVC_WARN_PROBE_DEF      1
533
534 extern unsigned int uvc_clock_param;
535 extern unsigned int uvc_no_drop_param;
536 extern unsigned int uvc_trace_param;
537 extern unsigned int uvc_timeout_param;
538
539 #define uvc_trace(flag, msg...) \
540         do { \
541                 if (uvc_trace_param & flag) \
542                         printk(KERN_DEBUG "uvcvideo: " msg); \
543         } while (0)
544
545 #define uvc_warn_once(dev, warn, msg...) \
546         do { \
547                 if (!test_and_set_bit(warn, &dev->warnings)) \
548                         printk(KERN_INFO "uvcvideo: " msg); \
549         } while (0)
550
551 #define uvc_printk(level, msg...) \
552         printk(level "uvcvideo: " msg)
553
554 /* --------------------------------------------------------------------------
555  * Internal functions.
556  */
557
558 /* Core driver */
559 extern struct uvc_driver uvc_driver;
560
561 /* Video buffers queue management. */
562 extern void uvc_queue_init(struct uvc_video_queue *queue,
563                 enum v4l2_buf_type type, int drop_corrupted);
564 extern int uvc_alloc_buffers(struct uvc_video_queue *queue,
565                 unsigned int nbuffers, unsigned int buflength);
566 extern int uvc_free_buffers(struct uvc_video_queue *queue);
567 extern int uvc_query_buffer(struct uvc_video_queue *queue,
568                 struct v4l2_buffer *v4l2_buf);
569 extern int uvc_queue_buffer(struct uvc_video_queue *queue,
570                 struct v4l2_buffer *v4l2_buf);
571 extern int uvc_dequeue_buffer(struct uvc_video_queue *queue,
572                 struct v4l2_buffer *v4l2_buf, int nonblocking);
573 extern int uvc_queue_enable(struct uvc_video_queue *queue, int enable);
574 extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
575 extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
576                 struct uvc_buffer *buf);
577 extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue,
578                 struct file *file, poll_table *wait);
579 extern int uvc_queue_allocated(struct uvc_video_queue *queue);
580 static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
581 {
582         return queue->flags & UVC_QUEUE_STREAMING;
583 }
584
585 /* V4L2 interface */
586 extern const struct v4l2_file_operations uvc_fops;
587
588 /* Video */
589 extern int uvc_video_init(struct uvc_streaming *stream);
590 extern int uvc_video_suspend(struct uvc_streaming *stream);
591 extern int uvc_video_resume(struct uvc_streaming *stream);
592 extern int uvc_video_enable(struct uvc_streaming *stream, int enable);
593 extern int uvc_probe_video(struct uvc_streaming *stream,
594                 struct uvc_streaming_control *probe);
595 extern int uvc_commit_video(struct uvc_streaming *stream,
596                 struct uvc_streaming_control *ctrl);
597 extern int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit,
598                 __u8 intfnum, __u8 cs, void *data, __u16 size);
599
600 /* Status */
601 extern int uvc_status_init(struct uvc_device *dev);
602 extern void uvc_status_cleanup(struct uvc_device *dev);
603 extern int uvc_status_start(struct uvc_device *dev);
604 extern void uvc_status_stop(struct uvc_device *dev);
605 extern int uvc_status_suspend(struct uvc_device *dev);
606 extern int uvc_status_resume(struct uvc_device *dev);
607
608 /* Controls */
609 extern struct uvc_control *uvc_find_control(struct uvc_video_chain *chain,
610                 __u32 v4l2_id, struct uvc_control_mapping **mapping);
611 extern int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
612                 struct v4l2_queryctrl *v4l2_ctrl);
613
614 extern int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
615                 const struct uvc_control_mapping *mapping);
616 extern int uvc_ctrl_init_device(struct uvc_device *dev);
617 extern void uvc_ctrl_cleanup_device(struct uvc_device *dev);
618 extern int uvc_ctrl_resume_device(struct uvc_device *dev);
619
620 extern int uvc_ctrl_begin(struct uvc_video_chain *chain);
621 extern int __uvc_ctrl_commit(struct uvc_video_chain *chain, int rollback);
622 static inline int uvc_ctrl_commit(struct uvc_video_chain *chain)
623 {
624         return __uvc_ctrl_commit(chain, 0);
625 }
626 static inline int uvc_ctrl_rollback(struct uvc_video_chain *chain)
627 {
628         return __uvc_ctrl_commit(chain, 1);
629 }
630
631 extern int uvc_ctrl_get(struct uvc_video_chain *chain,
632                 struct v4l2_ext_control *xctrl);
633 extern int uvc_ctrl_set(struct uvc_video_chain *chain,
634                 struct v4l2_ext_control *xctrl);
635
636 extern int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
637                 struct uvc_xu_control *ctrl, int set);
638
639 /* Utility functions */
640 extern void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
641                 unsigned int n_terms, unsigned int threshold);
642 extern uint32_t uvc_fraction_to_interval(uint32_t numerator,
643                 uint32_t denominator);
644 extern struct usb_host_endpoint *uvc_find_endpoint(
645                 struct usb_host_interface *alts, __u8 epaddr);
646
647 /* Quirks support */
648 void uvc_video_decode_isight(struct urb *urb, struct uvc_streaming *stream,
649                 struct uvc_buffer *buf);
650
651 #endif /* __KERNEL__ */
652
653 #endif
654