5 #error "The uvcvideo.h header is deprecated, use linux/uvcvideo.h instead."
6 #endif /* __KERNEL__ */
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-v4l2.h>
20 /* --------------------------------------------------------------------------
24 #define UVC_TERM_INPUT 0x0000
25 #define UVC_TERM_OUTPUT 0x8000
26 #define UVC_TERM_DIRECTION(term) ((term)->type & 0x8000)
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)
39 /* ------------------------------------------------------------------------
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}
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_BGR3 \
113 { 0x7d, 0xeb, 0x36, 0xe4, 0x4f, 0x52, 0xce, 0x11, \
114 0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}
115 #define UVC_GUID_FORMAT_M420 \
116 { 'M', '4', '2', '0', 0x00, 0x00, 0x10, 0x00, \
117 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
119 #define UVC_GUID_FORMAT_H264 \
120 { 'H', '2', '6', '4', 0x00, 0x00, 0x10, 0x00, \
121 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
122 #define UVC_GUID_FORMAT_Y8I \
123 { 'Y', '8', 'I', ' ', 0x00, 0x00, 0x10, 0x00, \
124 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
125 #define UVC_GUID_FORMAT_Y12I \
126 { 'Y', '1', '2', 'I', 0x00, 0x00, 0x10, 0x00, \
127 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
128 #define UVC_GUID_FORMAT_Z16 \
129 { 'Z', '1', '6', ' ', 0x00, 0x00, 0x10, 0x00, \
130 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
131 #define UVC_GUID_FORMAT_RW10 \
132 { 'R', 'W', '1', '0', 0x00, 0x00, 0x10, 0x00, \
133 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
135 /* ------------------------------------------------------------------------
136 * Driver specific constants.
139 #define DRIVER_VERSION "1.1.1"
141 /* Number of isochronous URBs. */
143 /* Maximum number of packets per URB. */
144 #define UVC_MAX_PACKETS 32
145 /* Maximum status buffer size in bytes of interrupt URB. */
146 #define UVC_MAX_STATUS_SIZE 16
148 #define UVC_CTRL_CONTROL_TIMEOUT 300
149 #define UVC_CTRL_STREAMING_TIMEOUT 5000
151 /* Maximum allowed number of control mappings per device */
152 #define UVC_MAX_CONTROL_MAPPINGS 1024
153 #define UVC_MAX_CONTROL_MENU_ENTRIES 32
156 #define UVC_QUIRK_STATUS_INTERVAL 0x00000001
157 #define UVC_QUIRK_PROBE_MINMAX 0x00000002
158 #define UVC_QUIRK_PROBE_EXTRAFIELDS 0x00000004
159 #define UVC_QUIRK_BUILTIN_ISIGHT 0x00000008
160 #define UVC_QUIRK_STREAM_NO_FID 0x00000010
161 #define UVC_QUIRK_IGNORE_SELECTOR_UNIT 0x00000020
162 #define UVC_QUIRK_FIX_BANDWIDTH 0x00000080
163 #define UVC_QUIRK_PROBE_DEF 0x00000100
164 #define UVC_QUIRK_RESTRICT_FRAME_RATE 0x00000200
165 #define UVC_QUIRK_RESTORE_CTRLS_ON_INIT 0x00000400
166 #define UVC_QUIRK_FORCE_Y8 0x00000800
169 #define UVC_FMT_FLAG_COMPRESSED 0x00000001
170 #define UVC_FMT_FLAG_STREAM 0x00000002
172 /* ------------------------------------------------------------------------
178 /* TODO: Put the most frequently accessed fields at the beginning of
179 * structures to maximize cache efficiency.
181 struct uvc_control_info {
182 struct list_head mappings;
185 __u8 index; /* Bit index in bmControls */
192 struct uvc_control_mapping {
193 struct list_head list;
194 struct list_head ev_subs;
203 enum v4l2_ctrl_type v4l2_type;
206 struct uvc_menu_info *menu_info;
213 __s32 (*get) (struct uvc_control_mapping *mapping, __u8 query,
215 void (*set) (struct uvc_control_mapping *mapping, __s32 value,
220 struct uvc_entity *entity;
221 struct uvc_control_info info;
223 __u8 index; /* Used to match the uvc_control entry with a
234 struct uvc_format_desc {
240 /* The term 'entity' refers to both UVC units and UVC terminals.
242 * The type field is either the terminal type (wTerminalType in the terminal
243 * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor).
244 * As the bDescriptorSubtype field is one byte long, the type value will
245 * always have a null MSB for units. All terminal types defined by the UVC
246 * specification have a non-null MSB, so it is safe to use the MSB to
247 * differentiate between units and terminals as long as the descriptor parsing
248 * code makes sure terminal types have a non-null MSB.
250 * For terminals, the type's most significant bit stores the terminal
251 * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should
252 * always be accessed with the UVC_ENTITY_* macros and never directly.
255 #define UVC_ENTITY_FLAG_DEFAULT (1 << 0)
258 struct list_head list; /* Entity as part of a UVC device. */
259 struct list_head chain; /* Entity as part of a video device
267 /* Media controller-related fields. */
268 struct video_device *vdev;
269 struct v4l2_subdev subdev;
270 unsigned int num_pads;
271 unsigned int num_links;
272 struct media_pad *pads;
276 __u16 wObjectiveFocalLengthMin;
277 __u16 wObjectiveFocalLengthMax;
278 __u16 wOcularFocalLength;
286 __u8 bTransportModeSize;
287 __u8 *bmTransportModes;
294 __u16 wMaxMultiplier;
297 __u8 bmVideoStandards;
304 __u8 guidExtensionCode[16];
308 __u8 *bmControlsType;
315 unsigned int ncontrols;
316 struct uvc_control *controls;
326 __u32 dwMaxVideoFrameBufferSize;
327 __u8 bFrameIntervalType;
328 __u32 dwDefaultFrameInterval;
329 __u32 *dwFrameInterval;
342 unsigned int nframes;
343 struct uvc_frame *frame;
346 struct uvc_streaming_header {
348 __u8 bEndpointAddress;
352 /* The following fields are used by input headers only. */
354 __u8 bStillCaptureMethod;
355 __u8 bTriggerSupport;
359 enum uvc_buffer_state {
360 UVC_BUF_STATE_IDLE = 0,
361 UVC_BUF_STATE_QUEUED = 1,
362 UVC_BUF_STATE_ACTIVE = 2,
363 UVC_BUF_STATE_READY = 3,
364 UVC_BUF_STATE_DONE = 4,
365 UVC_BUF_STATE_ERROR = 5,
369 struct vb2_v4l2_buffer buf;
370 struct list_head queue;
372 enum uvc_buffer_state state;
377 unsigned int bytesused;
382 #define UVC_QUEUE_DISCONNECTED (1 << 0)
383 #define UVC_QUEUE_DROP_CORRUPTED (1 << 1)
385 struct uvc_video_queue {
386 struct vb2_queue queue;
387 struct mutex mutex; /* Protects queue */
390 unsigned int buf_used;
392 spinlock_t irqlock; /* Protects irqqueue */
393 struct list_head irqqueue;
396 struct uvc_video_chain {
397 struct uvc_device *dev;
398 struct list_head list;
400 struct list_head entities; /* All entities */
401 struct uvc_entity *processing; /* Processing unit */
402 struct uvc_entity *selector; /* Selector unit */
404 struct mutex ctrl_mutex; /* Protects ctrl.info */
406 struct v4l2_prio_state prio; /* V4L2 priority state */
407 u32 caps; /* V4L2 chain-wide caps */
410 struct uvc_stats_frame {
411 unsigned int size; /* Number of bytes captured */
412 unsigned int first_data; /* Index of the first non-empty packet */
414 unsigned int nb_packets; /* Number of packets */
415 unsigned int nb_empty; /* Number of empty packets */
416 unsigned int nb_invalid; /* Number of packets with an invalid header */
417 unsigned int nb_errors; /* Number of packets with the error bit set */
419 unsigned int nb_pts; /* Number of packets with a PTS timestamp */
420 unsigned int nb_pts_diffs; /* Number of PTS differences inside a frame */
421 unsigned int last_pts_diff; /* Index of the last PTS difference */
422 bool has_initial_pts; /* Whether the first non-empty packet has a PTS */
423 bool has_early_pts; /* Whether a PTS is present before the first non-empty packet */
424 u32 pts; /* PTS of the last packet */
426 unsigned int nb_scr; /* Number of packets with a SCR timestamp */
427 unsigned int nb_scr_diffs; /* Number of SCR.STC differences inside a frame */
428 u16 scr_sof; /* SCR.SOF of the last packet */
429 u32 scr_stc; /* SCR.STC of the last packet */
432 struct uvc_stats_stream {
433 struct timespec start_ts; /* Stream start timestamp */
434 struct timespec stop_ts; /* Stream stop timestamp */
436 unsigned int nb_frames; /* Number of frames */
438 unsigned int nb_packets; /* Number of packets */
439 unsigned int nb_empty; /* Number of empty packets */
440 unsigned int nb_invalid; /* Number of packets with an invalid header */
441 unsigned int nb_errors; /* Number of packets with the error bit set */
443 unsigned int nb_pts_constant; /* Number of frames with constant PTS */
444 unsigned int nb_pts_early; /* Number of frames with early PTS */
445 unsigned int nb_pts_initial; /* Number of frames with initial PTS */
447 unsigned int nb_scr_count_ok; /* Number of frames with at least one SCR per non empty packet */
448 unsigned int nb_scr_diffs_ok; /* Number of frames with varying SCR.STC */
449 unsigned int scr_sof_count; /* STC.SOF counter accumulated since stream start */
450 unsigned int scr_sof; /* STC.SOF of the last packet */
451 unsigned int min_sof; /* Minimum STC.SOF value */
452 unsigned int max_sof; /* Maximum STC.SOF value */
455 struct uvc_streaming {
456 struct list_head list;
457 struct uvc_device *dev;
458 struct video_device vdev;
459 struct uvc_video_chain *chain;
462 struct usb_interface *intf;
466 struct uvc_streaming_header header;
467 enum v4l2_buf_type type;
469 unsigned int nformats;
470 struct uvc_format *format;
472 struct uvc_streaming_control ctrl;
473 struct uvc_format *def_format;
474 struct uvc_format *cur_format;
475 struct uvc_frame *cur_frame;
477 /* Protect access to ctrl, cur_format, cur_frame and hardware video
483 unsigned int frozen : 1;
484 struct uvc_video_queue queue;
485 void (*decode) (struct urb *urb, struct uvc_streaming *video,
486 struct uvc_buffer *buf);
488 /* Context data used by the bulk completion handler. */
491 unsigned int header_size;
494 __u32 max_payload_size;
497 struct urb *urb[UVC_URBS];
498 char *urb_buffer[UVC_URBS];
499 dma_addr_t urb_dma[UVC_URBS];
500 unsigned int urb_size;
506 struct dentry *debugfs_dir;
508 struct uvc_stats_frame frame;
509 struct uvc_stats_stream stream;
512 /* Timestamps support. */
514 struct uvc_clock_sample {
517 struct timespec host_ts;
533 struct usb_device *udev;
534 struct usb_interface *intf;
535 unsigned long warnings;
540 struct mutex lock; /* Protects users */
544 /* Video control interface */
545 #ifdef CONFIG_MEDIA_CONTROLLER
546 struct media_device mdev;
548 struct v4l2_device vdev;
550 __u32 clock_frequency;
552 struct list_head entities;
553 struct list_head chains;
555 /* Video Streaming interfaces */
556 struct list_head streams;
559 /* Status Interrupt Endpoint */
560 struct usb_host_endpoint *int_ep;
563 struct input_dev *input;
567 enum uvc_handle_state {
568 UVC_HANDLE_PASSIVE = 0,
569 UVC_HANDLE_ACTIVE = 1,
574 struct uvc_video_chain *chain;
575 struct uvc_streaming *stream;
576 enum uvc_handle_state state;
580 struct usb_driver driver;
583 /* ------------------------------------------------------------------------
584 * Debugging, printing and logging
587 #define UVC_TRACE_PROBE (1 << 0)
588 #define UVC_TRACE_DESCR (1 << 1)
589 #define UVC_TRACE_CONTROL (1 << 2)
590 #define UVC_TRACE_FORMAT (1 << 3)
591 #define UVC_TRACE_CAPTURE (1 << 4)
592 #define UVC_TRACE_CALLS (1 << 5)
593 #define UVC_TRACE_FRAME (1 << 7)
594 #define UVC_TRACE_SUSPEND (1 << 8)
595 #define UVC_TRACE_STATUS (1 << 9)
596 #define UVC_TRACE_VIDEO (1 << 10)
597 #define UVC_TRACE_STATS (1 << 11)
598 #define UVC_TRACE_CLOCK (1 << 12)
600 #define UVC_WARN_MINMAX 0
601 #define UVC_WARN_PROBE_DEF 1
602 #define UVC_WARN_XU_GET_RES 2
604 extern unsigned int uvc_clock_param;
605 extern unsigned int uvc_no_drop_param;
606 extern unsigned int uvc_trace_param;
607 extern unsigned int uvc_timeout_param;
608 extern unsigned int uvc_hw_timestamps_param;
610 #define uvc_trace(flag, msg...) \
612 if (uvc_trace_param & flag) \
613 printk(KERN_DEBUG "uvcvideo: " msg); \
616 #define uvc_warn_once(dev, warn, msg...) \
618 if (!test_and_set_bit(warn, &dev->warnings)) \
619 printk(KERN_INFO "uvcvideo: " msg); \
622 #define uvc_printk(level, msg...) \
623 printk(level "uvcvideo: " msg)
625 /* --------------------------------------------------------------------------
626 * Internal functions.
630 extern struct uvc_driver uvc_driver;
632 extern struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id);
634 /* Video buffers queue management. */
635 extern int uvc_queue_init(struct uvc_video_queue *queue,
636 enum v4l2_buf_type type, int drop_corrupted);
637 extern void uvc_queue_release(struct uvc_video_queue *queue);
638 extern int uvc_request_buffers(struct uvc_video_queue *queue,
639 struct v4l2_requestbuffers *rb);
640 extern int uvc_query_buffer(struct uvc_video_queue *queue,
641 struct v4l2_buffer *v4l2_buf);
642 extern int uvc_create_buffers(struct uvc_video_queue *queue,
643 struct v4l2_create_buffers *v4l2_cb);
644 extern int uvc_queue_buffer(struct uvc_video_queue *queue,
645 struct v4l2_buffer *v4l2_buf);
646 extern int uvc_export_buffer(struct uvc_video_queue *queue,
647 struct v4l2_exportbuffer *exp);
648 extern int uvc_dequeue_buffer(struct uvc_video_queue *queue,
649 struct v4l2_buffer *v4l2_buf, int nonblocking);
650 extern int uvc_queue_streamon(struct uvc_video_queue *queue,
651 enum v4l2_buf_type type);
652 extern int uvc_queue_streamoff(struct uvc_video_queue *queue,
653 enum v4l2_buf_type type);
654 extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
655 extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
656 struct uvc_buffer *buf);
657 extern int uvc_queue_mmap(struct uvc_video_queue *queue,
658 struct vm_area_struct *vma);
659 extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue,
660 struct file *file, poll_table *wait);
662 extern unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
663 unsigned long pgoff);
665 extern int uvc_queue_allocated(struct uvc_video_queue *queue);
666 static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
668 return vb2_is_streaming(&queue->queue);
672 extern const struct v4l2_ioctl_ops uvc_ioctl_ops;
673 extern const struct v4l2_file_operations uvc_fops;
675 /* Media controller */
676 extern int uvc_mc_register_entities(struct uvc_video_chain *chain);
677 extern void uvc_mc_cleanup_entity(struct uvc_entity *entity);
680 extern int uvc_video_init(struct uvc_streaming *stream);
681 extern int uvc_video_suspend(struct uvc_streaming *stream);
682 extern int uvc_video_resume(struct uvc_streaming *stream, int reset);
683 extern int uvc_video_enable(struct uvc_streaming *stream, int enable);
684 extern int uvc_probe_video(struct uvc_streaming *stream,
685 struct uvc_streaming_control *probe);
686 extern int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit,
687 __u8 intfnum, __u8 cs, void *data, __u16 size);
688 void uvc_video_clock_update(struct uvc_streaming *stream,
689 struct vb2_v4l2_buffer *vbuf,
690 struct uvc_buffer *buf);
693 extern int uvc_status_init(struct uvc_device *dev);
694 extern void uvc_status_cleanup(struct uvc_device *dev);
695 extern int uvc_status_start(struct uvc_device *dev, gfp_t flags);
696 extern void uvc_status_stop(struct uvc_device *dev);
699 extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops;
701 extern int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
702 struct v4l2_queryctrl *v4l2_ctrl);
703 extern int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
704 struct v4l2_querymenu *query_menu);
706 extern int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
707 const struct uvc_control_mapping *mapping);
708 extern int uvc_ctrl_init_device(struct uvc_device *dev);
709 extern void uvc_ctrl_cleanup_device(struct uvc_device *dev);
710 extern int uvc_ctrl_restore_values(struct uvc_device *dev);
712 extern int uvc_ctrl_begin(struct uvc_video_chain *chain);
713 extern int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback,
714 const struct v4l2_ext_control *xctrls,
715 unsigned int xctrls_count);
716 static inline int uvc_ctrl_commit(struct uvc_fh *handle,
717 const struct v4l2_ext_control *xctrls,
718 unsigned int xctrls_count)
720 return __uvc_ctrl_commit(handle, 0, xctrls, xctrls_count);
722 static inline int uvc_ctrl_rollback(struct uvc_fh *handle)
724 return __uvc_ctrl_commit(handle, 1, NULL, 0);
727 extern int uvc_ctrl_get(struct uvc_video_chain *chain,
728 struct v4l2_ext_control *xctrl);
729 extern int uvc_ctrl_set(struct uvc_video_chain *chain,
730 struct v4l2_ext_control *xctrl);
732 extern int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
733 struct uvc_xu_control_query *xqry);
735 /* Utility functions */
736 extern void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
737 unsigned int n_terms, unsigned int threshold);
738 extern uint32_t uvc_fraction_to_interval(uint32_t numerator,
739 uint32_t denominator);
740 extern struct usb_host_endpoint *uvc_find_endpoint(
741 struct usb_host_interface *alts, __u8 epaddr);
744 void uvc_video_decode_isight(struct urb *urb, struct uvc_streaming *stream,
745 struct uvc_buffer *buf);
747 /* debugfs and statistics */
748 int uvc_debugfs_init(void);
749 void uvc_debugfs_cleanup(void);
750 int uvc_debugfs_init_stream(struct uvc_streaming *stream);
751 void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream);
753 size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf,