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V4L/DVB (12326): zr364xx: error message when buffer is too small and code cleanup
[net-next-2.6.git] / drivers / media / video / uvc / uvcvideo.h
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c0efd232
LP		 1#ifndef _USB_VIDEO_H_
2#define _USB_VIDEO_H_
3
4#include <linux/kernel.h>
5#include <linux/videodev2.h>
6
c0efd232
LP		 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
35struct uvc_xu_control_info {
36 __u8 entity[16];
37 __u8 index;
38 __u8 selector;
39 __u16 size;
40 __u32 flags;
41};
42
43struct uvc_xu_control_mapping {
44 __u32 id;
45 __u8 name[32];
46 __u8 entity[16];
47 __u8 selector;
48
49 __u8 size;
50 __u8 offset;
51 enum v4l2_ctrl_type v4l2_type;
52 __u32 data_type;
53};
54
55struct uvc_xu_control {
56 __u8 unit;
57 __u8 selector;
58 __u16 size;
59 __u8 __user *data;
60};
61
62#define UVCIOC_CTRL_ADD _IOW('U', 1, struct uvc_xu_control_info)
63#define UVCIOC_CTRL_MAP _IOWR('U', 2, struct uvc_xu_control_mapping)
64#define UVCIOC_CTRL_GET _IOWR('U', 3, struct uvc_xu_control)
65#define UVCIOC_CTRL_SET _IOW('U', 4, struct uvc_xu_control)
66
67#ifdef __KERNEL__
68
69#include <linux/poll.h>
de05f634 70#include <linux/usb/video.h>
c0efd232
LP		 71
72/* --------------------------------------------------------------------------
73 * UVC constants
74 */
75
c0efd232
LP		 76#define UVC_TERM_INPUT 0x0000
77#define UVC_TERM_OUTPUT 0x8000
78
79#define UVC_ENTITY_TYPE(entity) ((entity)->type & 0x7fff)
80#define UVC_ENTITY_IS_UNIT(entity) (((entity)->type & 0xff00) == 0)
81#define UVC_ENTITY_IS_TERM(entity) (((entity)->type & 0xff00) != 0)
82#define UVC_ENTITY_IS_ITERM(entity) \
83 (((entity)->type & 0x8000) == UVC_TERM_INPUT)
84#define UVC_ENTITY_IS_OTERM(entity) \
85 (((entity)->type & 0x8000) == UVC_TERM_OUTPUT)
86
c0efd232
LP		 87
88/* ------------------------------------------------------------------------
89 * GUIDs
90 */
91#define UVC_GUID_UVC_CAMERA \
92 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
93 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}
94#define UVC_GUID_UVC_OUTPUT \
95 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
96 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}
97#define UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT \
98 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
99 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03}
100#define UVC_GUID_UVC_PROCESSING \
101 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
102 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01}
103#define UVC_GUID_UVC_SELECTOR \
104 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
105 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02}
106
c0efd232
LP		 107#define UVC_GUID_FORMAT_MJPEG \
108 { 'M', 'J', 'P', 'G', 0x00, 0x00, 0x10, 0x00, \
109 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
110#define UVC_GUID_FORMAT_YUY2 \
111 { 'Y', 'U', 'Y', '2', 0x00, 0x00, 0x10, 0x00, \
112 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
113#define UVC_GUID_FORMAT_NV12 \
114 { 'N', 'V', '1', '2', 0x00, 0x00, 0x10, 0x00, \
115 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
116#define UVC_GUID_FORMAT_YV12 \
117 { 'Y', 'V', '1', '2', 0x00, 0x00, 0x10, 0x00, \
118 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
119#define UVC_GUID_FORMAT_I420 \
120 { 'I', '4', '2', '0', 0x00, 0x00, 0x10, 0x00, \
121 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
122#define UVC_GUID_FORMAT_UYVY \
123 { 'U', 'Y', 'V', 'Y', 0x00, 0x00, 0x10, 0x00, \
124 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
125#define UVC_GUID_FORMAT_Y800 \
126 { 'Y', '8', '0', '0', 0x00, 0x00, 0x10, 0x00, \
127 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
128#define UVC_GUID_FORMAT_BY8 \
129 { 'B', 'Y', '8', ' ', 0x00, 0x00, 0x10, 0x00, \
130 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
131
132
133/* ------------------------------------------------------------------------
134 * Driver specific constants.
135 */
136
137#define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 1, 0)
138
139/* Number of isochronous URBs. */
140#define UVC_URBS 5
efdc8a95
LP		 141/* Maximum number of packets per URB. */
142#define UVC_MAX_PACKETS 32
c0efd232
LP		 143/* Maximum number of video buffers. */
144#define UVC_MAX_VIDEO_BUFFERS 32
a31a4055
ML		 145/* Maximum status buffer size in bytes of interrupt URB. */
146#define UVC_MAX_STATUS_SIZE 16
c0efd232
LP		 147
148#define UVC_CTRL_CONTROL_TIMEOUT 300
149#define UVC_CTRL_STREAMING_TIMEOUT 1000
150
151/* Devices quirks */
152#define UVC_QUIRK_STATUS_INTERVAL 0x00000001
153#define UVC_QUIRK_PROBE_MINMAX 0x00000002
154#define UVC_QUIRK_PROBE_EXTRAFIELDS 0x00000004
155#define UVC_QUIRK_BUILTIN_ISIGHT 0x00000008
156#define UVC_QUIRK_STREAM_NO_FID 0x00000010
157#define UVC_QUIRK_IGNORE_SELECTOR_UNIT 0x00000020
50144aee 158#define UVC_QUIRK_FIX_BANDWIDTH 0x00000080
c0efd232
LP		 159
160/* Format flags */
161#define UVC_FMT_FLAG_COMPRESSED 0x00000001
162#define UVC_FMT_FLAG_STREAM 0x00000002
163
164/* ------------------------------------------------------------------------
165 * Structures.
166 */
167
168struct uvc_device;
169
170/* TODO: Put the most frequently accessed fields at the beginning of
171 * structures to maximize cache efficiency.
172 */
173struct uvc_streaming_control {
174 __u16 bmHint;
175 __u8 bFormatIndex;
176 __u8 bFrameIndex;
177 __u32 dwFrameInterval;
178 __u16 wKeyFrameRate;
179 __u16 wPFrameRate;
180 __u16 wCompQuality;
181 __u16 wCompWindowSize;
182 __u16 wDelay;
183 __u32 dwMaxVideoFrameSize;
184 __u32 dwMaxPayloadTransferSize;
185 __u32 dwClockFrequency;
186 __u8 bmFramingInfo;
187 __u8 bPreferedVersion;
188 __u8 bMinVersion;
189 __u8 bMaxVersion;
190};
191
192struct uvc_menu_info {
193 __u32 value;
194 __u8 name[32];
195};
196
197struct uvc_control_info {
198 struct list_head list;
199 struct list_head mappings;
200
201 __u8 entity[16];
202 __u8 index;
203 __u8 selector;
204
205 __u16 size;
206 __u32 flags;
207};
208
209struct uvc_control_mapping {
210 struct list_head list;
211
212 struct uvc_control_info *ctrl;
213
214 __u32 id;
215 __u8 name[32];
216 __u8 entity[16];
217 __u8 selector;
218
219 __u8 size;
220 __u8 offset;
221 enum v4l2_ctrl_type v4l2_type;
222 __u32 data_type;
223
224 struct uvc_menu_info *menu_info;
225 __u32 menu_count;
9768352a
LP		 226
227 __s32 (*get) (struct uvc_control_mapping *mapping, __u8 query,
228 const __u8 *data);
229 void (*set) (struct uvc_control_mapping *mapping, __s32 value,
230 __u8 *data);
c0efd232
LP		 231};
232
233struct uvc_control {
234 struct uvc_entity *entity;
235 struct uvc_control_info *info;
236
237 __u8 index; /* Used to match the uvc_control entry with a
238 uvc_control_info. */
239 __u8 dirty : 1,
240 loaded : 1,
241 modified : 1;
242
243 __u8 *data;
244};
245
246struct uvc_format_desc {
247 char *name;
248 __u8 guid[16];
249 __u32 fcc;
250};
251
252/* The term 'entity' refers to both UVC units and UVC terminals.
253 *
254 * The type field is either the terminal type (wTerminalType in the terminal
255 * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor).
256 * As the bDescriptorSubtype field is one byte long, the type value will
257 * always have a null MSB for units. All terminal types defined by the UVC
258 * specification have a non-null MSB, so it is safe to use the MSB to
259 * differentiate between units and terminals as long as the descriptor parsing
260 * code makes sure terminal types have a non-null MSB.
261 *
262 * For terminals, the type's most significant bit stores the terminal
263 * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should
264 * always be accessed with the UVC_ENTITY_* macros and never directly.
265 */
266
267struct uvc_entity {
268 struct list_head list; /* Entity as part of a UVC device. */
269 struct list_head chain; /* Entity as part of a video device
270 * chain. */
271 __u8 id;
272 __u16 type;
273 char name[64];
274
275 union {
276 struct {
277 __u16 wObjectiveFocalLengthMin;
278 __u16 wObjectiveFocalLengthMax;
279 __u16 wOcularFocalLength;
280 __u8 bControlSize;
281 __u8 *bmControls;
282 } camera;
283
284 struct {
285 __u8 bControlSize;
286 __u8 *bmControls;
287 __u8 bTransportModeSize;
288 __u8 *bmTransportModes;
289 } media;
290
291 struct {
292 __u8 bSourceID;
293 } output;
294
295 struct {
296 __u8 bSourceID;
297 __u16 wMaxMultiplier;
298 __u8 bControlSize;
299 __u8 *bmControls;
300 __u8 bmVideoStandards;
301 } processing;
302
303 struct {
304 __u8 bNrInPins;
305 __u8 *baSourceID;
306 } selector;
307
308 struct {
309 __u8 guidExtensionCode[16];
310 __u8 bNumControls;
311 __u8 bNrInPins;
312 __u8 *baSourceID;
313 __u8 bControlSize;
314 __u8 *bmControls;
315 __u8 *bmControlsType;
316 } extension;
317 };
318
319 unsigned int ncontrols;
320 struct uvc_control *controls;
321};
322
323struct uvc_frame {
324 __u8 bFrameIndex;
325 __u8 bmCapabilities;
326 __u16 wWidth;
327 __u16 wHeight;
328 __u32 dwMinBitRate;
329 __u32 dwMaxBitRate;
330 __u32 dwMaxVideoFrameBufferSize;
331 __u8 bFrameIntervalType;
332 __u32 dwDefaultFrameInterval;
333 __u32 *dwFrameInterval;
334};
335
336struct uvc_format {
337 __u8 type;
338 __u8 index;
339 __u8 bpp;
340 __u8 colorspace;
341 __u32 fcc;
342 __u32 flags;
343
344 char name[32];
345
346 unsigned int nframes;
347 struct uvc_frame *frame;
348};
349
350struct uvc_streaming_header {
351 __u8 bNumFormats;
352 __u8 bEndpointAddress;
353 __u8 bTerminalLink;
354 __u8 bControlSize;
355 __u8 *bmaControls;
356 /* The following fields are used by input headers only. */
357 __u8 bmInfo;
358 __u8 bStillCaptureMethod;
359 __u8 bTriggerSupport;
360 __u8 bTriggerUsage;
361};
362
363struct uvc_streaming {
364 struct list_head list;
365
366 struct usb_interface *intf;
367 int intfnum;
368 __u16 maxpsize;
369
370 struct uvc_streaming_header header;
ff924203 371 enum v4l2_buf_type type;
c0efd232
LP		 372
373 unsigned int nformats;
374 struct uvc_format *format;
375
376 struct uvc_streaming_control ctrl;
377 struct uvc_format *cur_format;
378 struct uvc_frame *cur_frame;
379
380 struct mutex mutex;
381};
382
383enum uvc_buffer_state {
2c2d264b
LP		 384 UVC_BUF_STATE_IDLE = 0,
385 UVC_BUF_STATE_QUEUED = 1,
386 UVC_BUF_STATE_ACTIVE = 2,
387 UVC_BUF_STATE_DONE = 3,
388 UVC_BUF_STATE_ERROR = 4,
c0efd232
LP		 389};
390
391struct uvc_buffer {
392 unsigned long vma_use_count;
393 struct list_head stream;
394
395 /* Touched by interrupt handler. */
396 struct v4l2_buffer buf;
397 struct list_head queue;
398 wait_queue_head_t wait;
399 enum uvc_buffer_state state;
400};
401
402#define UVC_QUEUE_STREAMING (1 << 0)
403#define UVC_QUEUE_DISCONNECTED (1 << 1)
404#define UVC_QUEUE_DROP_INCOMPLETE (1 << 2)
405
406struct uvc_video_queue {
ff924203
LP		 407 enum v4l2_buf_type type;
408
c0efd232
LP		 409 void *mem;
410 unsigned int flags;
411 __u32 sequence;
412
413 unsigned int count;
414 unsigned int buf_size;
ff924203 415 unsigned int buf_used;
c0efd232
LP		 416 struct uvc_buffer buffer[UVC_MAX_VIDEO_BUFFERS];
417 struct mutex mutex; /* protects buffers and mainqueue */
418 spinlock_t irqlock; /* protects irqqueue */
419
420 struct list_head mainqueue;
421 struct list_head irqqueue;
422};
423
424struct uvc_video_device {
425 struct uvc_device *dev;
426 struct video_device *vdev;
427 atomic_t active;
428 unsigned int frozen : 1;
429
ff924203
LP		 430 struct list_head iterms; /* Input terminals */
431 struct uvc_entity *oterm; /* Output terminal */
432 struct uvc_entity *sterm; /* USB streaming terminal */
c0efd232
LP		 433 struct uvc_entity *processing;
434 struct uvc_entity *selector;
435 struct list_head extensions;
436 struct mutex ctrl_mutex;
437
438 struct uvc_video_queue queue;
439
440 /* Video streaming object, must always be non-NULL. */
441 struct uvc_streaming *streaming;
442
443 void (*decode) (struct urb *urb, struct uvc_video_device *video,
444 struct uvc_buffer *buf);
445
446 /* Context data used by the bulk completion handler. */
447 struct {
448 __u8 header[256];
449 unsigned int header_size;
450 int skip_payload;
451 __u32 payload_size;
452 __u32 max_payload_size;
453 } bulk;
454
455 struct urb *urb[UVC_URBS];
456 char *urb_buffer[UVC_URBS];
e01117c8
LP		 457 dma_addr_t urb_dma[UVC_URBS];
458 unsigned int urb_size;
c0efd232
LP		 459
460 __u8 last_fid;
461};
462
463enum uvc_device_state {
464 UVC_DEV_DISCONNECTED = 1,
465};
466
467struct uvc_device {
468 struct usb_device *udev;
469 struct usb_interface *intf;
44f0079e 470 unsigned long warnings;
c0efd232
LP		 471 __u32 quirks;
472 int intfnum;
473 char name[32];
474
475 enum uvc_device_state state;
476 struct kref kref;
477 struct list_head list;
04a37e0f 478 atomic_t users;
c0efd232
LP		 479
480 /* Video control interface */
481 __u16 uvc_version;
482 __u32 clock_frequency;
483
484 struct list_head entities;
485
486 struct uvc_video_device video;
487
488 /* Status Interrupt Endpoint */
489 struct usb_host_endpoint *int_ep;
490 struct urb *int_urb;
a31a4055 491 __u8 *status;
c0efd232 492 struct input_dev *input;
f1801523 493 char input_phys[64];
c0efd232
LP		 494
495 /* Video Streaming interfaces */
496 struct list_head streaming;
497};
498
499enum uvc_handle_state {
500 UVC_HANDLE_PASSIVE = 0,
501 UVC_HANDLE_ACTIVE = 1,
502};
503
504struct uvc_fh {
505 struct uvc_video_device *device;
506 enum uvc_handle_state state;
507};
508
509struct uvc_driver {
510 struct usb_driver driver;
511
512 struct mutex open_mutex; /* protects from open/disconnect race */
513
514 struct list_head devices; /* struct uvc_device list */
515 struct list_head controls; /* struct uvc_control_info list */
516 struct mutex ctrl_mutex; /* protects controls and devices
517 lists */
518};
519
520/* ------------------------------------------------------------------------
521 * Debugging, printing and logging
522 */
523
524#define UVC_TRACE_PROBE (1 << 0)
525#define UVC_TRACE_DESCR (1 << 1)
526#define UVC_TRACE_CONTROL (1 << 2)
527#define UVC_TRACE_FORMAT (1 << 3)
528#define UVC_TRACE_CAPTURE (1 << 4)
529#define UVC_TRACE_CALLS (1 << 5)
530#define UVC_TRACE_IOCTL (1 << 6)
531#define UVC_TRACE_FRAME (1 << 7)
532#define UVC_TRACE_SUSPEND (1 << 8)
533#define UVC_TRACE_STATUS (1 << 9)
534
44f0079e
LP		 535#define UVC_WARN_MINMAX 0
536#define UVC_WARN_PROBE_DEF 1
537
0fbd8ee6 538extern unsigned int uvc_no_drop_param;
c0efd232
LP		 539extern unsigned int uvc_trace_param;
540
541#define uvc_trace(flag, msg...) \
542 do { \
543 if (uvc_trace_param & flag) \
544 printk(KERN_DEBUG "uvcvideo: " msg); \
545 } while (0)
546
44f0079e
LP		 547#define uvc_warn_once(dev, warn, msg...) \
548 do { \
549 if (!test_and_set_bit(warn, &dev->warnings)) \
550 printk(KERN_INFO "uvcvideo: " msg); \
551 } while (0)
552
c0efd232
LP		 553#define uvc_printk(level, msg...) \
554 printk(level "uvcvideo: " msg)
555
556#define UVC_GUID_FORMAT "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-" \
557 "%02x%02x%02x%02x%02x%02x"
558#define UVC_GUID_ARGS(guid) \
559 (guid)[3], (guid)[2], (guid)[1], (guid)[0], \
560 (guid)[5], (guid)[4], \
561 (guid)[7], (guid)[6], \
562 (guid)[8], (guid)[9], \
563 (guid)[10], (guid)[11], (guid)[12], \
564 (guid)[13], (guid)[14], (guid)[15]
565
566/* --------------------------------------------------------------------------
567 * Internal functions.
568 */
569
570/* Core driver */
571extern struct uvc_driver uvc_driver;
572extern void uvc_delete(struct kref *kref);
573
574/* Video buffers queue management. */
ff924203
LP		 575extern void uvc_queue_init(struct uvc_video_queue *queue,
576 enum v4l2_buf_type type);
c0efd232
LP		 577extern int uvc_alloc_buffers(struct uvc_video_queue *queue,
578 unsigned int nbuffers, unsigned int buflength);
579extern int uvc_free_buffers(struct uvc_video_queue *queue);
580extern int uvc_query_buffer(struct uvc_video_queue *queue,
581 struct v4l2_buffer *v4l2_buf);
582extern int uvc_queue_buffer(struct uvc_video_queue *queue,
583 struct v4l2_buffer *v4l2_buf);
584extern int uvc_dequeue_buffer(struct uvc_video_queue *queue,
585 struct v4l2_buffer *v4l2_buf, int nonblocking);
586extern int uvc_queue_enable(struct uvc_video_queue *queue, int enable);
587extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
588extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
589 struct uvc_buffer *buf);
590extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue,
591 struct file *file, poll_table *wait);
23ff6043 592extern int uvc_queue_allocated(struct uvc_video_queue *queue);
c0efd232
LP		 593static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
594{
595 return queue->flags & UVC_QUEUE_STREAMING;
596}
597
598/* V4L2 interface */
bec43661 599extern const struct v4l2_file_operations uvc_fops;
c0efd232
LP		 600
601/* Video */
602extern int uvc_video_init(struct uvc_video_device *video);
603extern int uvc_video_suspend(struct uvc_video_device *video);
604extern int uvc_video_resume(struct uvc_video_device *video);
605extern int uvc_video_enable(struct uvc_video_device *video, int enable);
606extern int uvc_probe_video(struct uvc_video_device *video,
607 struct uvc_streaming_control *probe);
44f0079e
LP		 608extern int uvc_commit_video(struct uvc_video_device *video,
609 struct uvc_streaming_control *ctrl);
c0efd232
LP		 610extern int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit,
611 __u8 intfnum, __u8 cs, void *data, __u16 size);
c0efd232
LP		 612
613/* Status */
614extern int uvc_status_init(struct uvc_device *dev);
615extern void uvc_status_cleanup(struct uvc_device *dev);
04a37e0f
LP		 616extern int uvc_status_start(struct uvc_device *dev);
617extern void uvc_status_stop(struct uvc_device *dev);
c0efd232
LP		 618extern int uvc_status_suspend(struct uvc_device *dev);
619extern int uvc_status_resume(struct uvc_device *dev);
620
621/* Controls */
622extern struct uvc_control *uvc_find_control(struct uvc_video_device *video,
623 __u32 v4l2_id, struct uvc_control_mapping **mapping);
624extern int uvc_query_v4l2_ctrl(struct uvc_video_device *video,
625 struct v4l2_queryctrl *v4l2_ctrl);
626
627extern int uvc_ctrl_add_info(struct uvc_control_info *info);
628extern int uvc_ctrl_add_mapping(struct uvc_control_mapping *mapping);
629extern int uvc_ctrl_init_device(struct uvc_device *dev);
630extern void uvc_ctrl_cleanup_device(struct uvc_device *dev);
631extern int uvc_ctrl_resume_device(struct uvc_device *dev);
632extern void uvc_ctrl_init(void);
633
634extern int uvc_ctrl_begin(struct uvc_video_device *video);
635extern int __uvc_ctrl_commit(struct uvc_video_device *video, int rollback);
636static inline int uvc_ctrl_commit(struct uvc_video_device *video)
637{
638 return __uvc_ctrl_commit(video, 0);
639}
640static inline int uvc_ctrl_rollback(struct uvc_video_device *video)
641{
642 return __uvc_ctrl_commit(video, 1);
643}
644
645extern int uvc_ctrl_get(struct uvc_video_device *video,
646 struct v4l2_ext_control *xctrl);
647extern int uvc_ctrl_set(struct uvc_video_device *video,
648 struct v4l2_ext_control *xctrl);
649
650extern int uvc_xu_ctrl_query(struct uvc_video_device *video,
651 struct uvc_xu_control *ctrl, int set);
652
653/* Utility functions */
654extern void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
655 unsigned int n_terms, unsigned int threshold);
656extern uint32_t uvc_fraction_to_interval(uint32_t numerator,
657 uint32_t denominator);
658extern struct usb_host_endpoint *uvc_find_endpoint(
659 struct usb_host_interface *alts, __u8 epaddr);
660
661/* Quirks support */
662void uvc_video_decode_isight(struct urb *urb, struct uvc_video_device *video,
663 struct uvc_buffer *buf);
664
665#endif /* __KERNEL__ */
666
667#endif
f87086e3 668
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