1 /* SPDX-License-Identifier: GPL-2.0 */
6 #error "The uvcvideo.h header is deprecated, use linux/uvcvideo.h instead."
7 #endif /* __KERNEL__ */
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>
22 /* --------------------------------------------------------------------------
26 #define UVC_TERM_INPUT 0x0000
27 #define UVC_TERM_OUTPUT 0x8000
28 #define UVC_TERM_DIRECTION(term) ((term)->type & 0x8000)
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)
41 /* ------------------------------------------------------------------------
44 #define UVC_GUID_UVC_CAMERA \
45 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
46 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}
47 #define UVC_GUID_UVC_OUTPUT \
48 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
49 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}
50 #define UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT \
51 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
52 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03}
53 #define UVC_GUID_UVC_PROCESSING \
54 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
55 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01}
56 #define UVC_GUID_UVC_SELECTOR \
57 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
58 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02}
60 #define UVC_GUID_FORMAT_MJPEG \
61 { 'M', 'J', 'P', 'G', 0x00, 0x00, 0x10, 0x00, \
62 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
63 #define UVC_GUID_FORMAT_YUY2 \
64 { 'Y', 'U', 'Y', '2', 0x00, 0x00, 0x10, 0x00, \
65 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
66 #define UVC_GUID_FORMAT_YUY2_ISIGHT \
67 { 'Y', 'U', 'Y', '2', 0x00, 0x00, 0x10, 0x00, \
68 0x80, 0x00, 0x00, 0x00, 0x00, 0x38, 0x9b, 0x71}
69 #define UVC_GUID_FORMAT_NV12 \
70 { 'N', 'V', '1', '2', 0x00, 0x00, 0x10, 0x00, \
71 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
72 #define UVC_GUID_FORMAT_YV12 \
73 { 'Y', 'V', '1', '2', 0x00, 0x00, 0x10, 0x00, \
74 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
75 #define UVC_GUID_FORMAT_I420 \
76 { 'I', '4', '2', '0', 0x00, 0x00, 0x10, 0x00, \
77 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
78 #define UVC_GUID_FORMAT_UYVY \
79 { 'U', 'Y', 'V', 'Y', 0x00, 0x00, 0x10, 0x00, \
80 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
81 #define UVC_GUID_FORMAT_Y800 \
82 { 'Y', '8', '0', '0', 0x00, 0x00, 0x10, 0x00, \
83 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
84 #define UVC_GUID_FORMAT_Y8 \
85 { 'Y', '8', ' ', ' ', 0x00, 0x00, 0x10, 0x00, \
86 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
87 #define UVC_GUID_FORMAT_Y10 \
88 { 'Y', '1', '0', ' ', 0x00, 0x00, 0x10, 0x00, \
89 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
90 #define UVC_GUID_FORMAT_Y12 \
91 { 'Y', '1', '2', ' ', 0x00, 0x00, 0x10, 0x00, \
92 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
93 #define UVC_GUID_FORMAT_Y16 \
94 { 'Y', '1', '6', ' ', 0x00, 0x00, 0x10, 0x00, \
95 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
96 #define UVC_GUID_FORMAT_BY8 \
97 { 'B', 'Y', '8', ' ', 0x00, 0x00, 0x10, 0x00, \
98 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
99 #define UVC_GUID_FORMAT_BA81 \
100 { 'B', 'A', '8', '1', 0x00, 0x00, 0x10, 0x00, \
101 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
102 #define UVC_GUID_FORMAT_GBRG \
103 { 'G', 'B', 'R', 'G', 0x00, 0x00, 0x10, 0x00, \
104 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
105 #define UVC_GUID_FORMAT_GRBG \
106 { 'G', 'R', 'B', 'G', 0x00, 0x00, 0x10, 0x00, \
107 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
108 #define UVC_GUID_FORMAT_RGGB \
109 { 'R', 'G', 'G', 'B', 0x00, 0x00, 0x10, 0x00, \
110 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
111 #define UVC_GUID_FORMAT_BG16 \
112 { 'B', 'G', '1', '6', 0x00, 0x00, 0x10, 0x00, \
113 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
114 #define UVC_GUID_FORMAT_GB16 \
115 { 'G', 'B', '1', '6', 0x00, 0x00, 0x10, 0x00, \
116 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
117 #define UVC_GUID_FORMAT_RG16 \
118 { 'R', 'G', '1', '6', 0x00, 0x00, 0x10, 0x00, \
119 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
120 #define UVC_GUID_FORMAT_GR16 \
121 { 'G', 'R', '1', '6', 0x00, 0x00, 0x10, 0x00, \
122 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
123 #define UVC_GUID_FORMAT_RGBP \
124 { 'R', 'G', 'B', 'P', 0x00, 0x00, 0x10, 0x00, \
125 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
126 #define UVC_GUID_FORMAT_BGR3 \
127 { 0x7d, 0xeb, 0x36, 0xe4, 0x4f, 0x52, 0xce, 0x11, \
128 0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}
129 #define UVC_GUID_FORMAT_M420 \
130 { 'M', '4', '2', '0', 0x00, 0x00, 0x10, 0x00, \
131 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
133 #define UVC_GUID_FORMAT_H264 \
134 { 'H', '2', '6', '4', 0x00, 0x00, 0x10, 0x00, \
135 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
136 #define UVC_GUID_FORMAT_Y8I \
137 { 'Y', '8', 'I', ' ', 0x00, 0x00, 0x10, 0x00, \
138 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
139 #define UVC_GUID_FORMAT_Y12I \
140 { 'Y', '1', '2', 'I', 0x00, 0x00, 0x10, 0x00, \
141 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
142 #define UVC_GUID_FORMAT_Z16 \
143 { 'Z', '1', '6', ' ', 0x00, 0x00, 0x10, 0x00, \
144 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
145 #define UVC_GUID_FORMAT_RW10 \
146 { 'R', 'W', '1', '0', 0x00, 0x00, 0x10, 0x00, \
147 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
148 #define UVC_GUID_FORMAT_INVZ \
149 { 'I', 'N', 'V', 'Z', 0x90, 0x2d, 0x58, 0x4a, \
150 0x92, 0x0b, 0x77, 0x3f, 0x1f, 0x2c, 0x55, 0x6b}
151 #define UVC_GUID_FORMAT_INZI \
152 { 'I', 'N', 'Z', 'I', 0x66, 0x1a, 0x42, 0xa2, \
153 0x90, 0x65, 0xd0, 0x18, 0x14, 0xa8, 0xef, 0x8a}
154 #define UVC_GUID_FORMAT_INVI \
155 { 'I', 'N', 'V', 'I', 0xdb, 0x57, 0x49, 0x5e, \
156 0x8e, 0x3f, 0xf4, 0x79, 0x53, 0x2b, 0x94, 0x6f}
157 #define UVC_GUID_FORMAT_CNF4 \
158 { 'C', ' ', ' ', ' ', 0x00, 0x00, 0x10, 0x00, \
159 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
161 #define UVC_GUID_FORMAT_D3DFMT_L8 \
162 {0x32, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, \
163 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
164 #define UVC_GUID_FORMAT_KSMEDIA_L8_IR \
165 {0x32, 0x00, 0x00, 0x00, 0x02, 0x00, 0x10, 0x00, \
166 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
169 /* ------------------------------------------------------------------------
170 * Driver specific constants.
173 #define DRIVER_VERSION "1.1.1"
175 /* Number of isochronous URBs. */
177 /* Maximum number of packets per URB. */
178 #define UVC_MAX_PACKETS 32
179 /* Maximum status buffer size in bytes of interrupt URB. */
180 #define UVC_MAX_STATUS_SIZE 16
182 #define UVC_CTRL_CONTROL_TIMEOUT 500
183 #define UVC_CTRL_STREAMING_TIMEOUT 5000
185 /* Maximum allowed number of control mappings per device */
186 #define UVC_MAX_CONTROL_MAPPINGS 1024
187 #define UVC_MAX_CONTROL_MENU_ENTRIES 32
190 #define UVC_QUIRK_STATUS_INTERVAL 0x00000001
191 #define UVC_QUIRK_PROBE_MINMAX 0x00000002
192 #define UVC_QUIRK_PROBE_EXTRAFIELDS 0x00000004
193 #define UVC_QUIRK_BUILTIN_ISIGHT 0x00000008
194 #define UVC_QUIRK_STREAM_NO_FID 0x00000010
195 #define UVC_QUIRK_IGNORE_SELECTOR_UNIT 0x00000020
196 #define UVC_QUIRK_FIX_BANDWIDTH 0x00000080
197 #define UVC_QUIRK_PROBE_DEF 0x00000100
198 #define UVC_QUIRK_RESTRICT_FRAME_RATE 0x00000200
199 #define UVC_QUIRK_RESTORE_CTRLS_ON_INIT 0x00000400
200 #define UVC_QUIRK_FORCE_Y8 0x00000800
201 #define UVC_QUIRK_FORCE_BPP 0x00001000
204 #define UVC_FMT_FLAG_COMPRESSED 0x00000001
205 #define UVC_FMT_FLAG_STREAM 0x00000002
207 /* ------------------------------------------------------------------------
213 /* TODO: Put the most frequently accessed fields at the beginning of
214 * structures to maximize cache efficiency.
216 struct uvc_control_info {
217 struct list_head mappings;
220 u8 index; /* Bit index in bmControls */
227 struct uvc_control_mapping {
228 struct list_head list;
229 struct list_head ev_subs;
238 enum v4l2_ctrl_type v4l2_type;
241 const struct uvc_menu_info *menu_info;
248 s32 (*get)(struct uvc_control_mapping *mapping, u8 query,
250 void (*set)(struct uvc_control_mapping *mapping, s32 value,
255 struct uvc_entity *entity;
256 struct uvc_control_info info;
258 u8 index; /* Used to match the uvc_control entry with a
268 struct uvc_fh *handle; /* File handle that last changed the control. */
271 struct uvc_format_desc {
277 /* The term 'entity' refers to both UVC units and UVC terminals.
279 * The type field is either the terminal type (wTerminalType in the terminal
280 * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor).
281 * As the bDescriptorSubtype field is one byte long, the type value will
282 * always have a null MSB for units. All terminal types defined by the UVC
283 * specification have a non-null MSB, so it is safe to use the MSB to
284 * differentiate between units and terminals as long as the descriptor parsing
285 * code makes sure terminal types have a non-null MSB.
287 * For terminals, the type's most significant bit stores the terminal
288 * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should
289 * always be accessed with the UVC_ENTITY_* macros and never directly.
292 #define UVC_ENTITY_FLAG_DEFAULT (1 << 0)
295 struct list_head list; /* Entity as part of a UVC device. */
296 struct list_head chain; /* Entity as part of a video device
304 /* Media controller-related fields. */
305 struct video_device *vdev;
306 struct v4l2_subdev subdev;
307 unsigned int num_pads;
308 unsigned int num_links;
309 struct media_pad *pads;
313 u16 wObjectiveFocalLengthMin;
314 u16 wObjectiveFocalLengthMax;
315 u16 wOcularFocalLength;
323 u8 bTransportModeSize;
324 u8 *bmTransportModes;
341 u8 guidExtensionCode[16];
352 unsigned int ncontrols;
353 struct uvc_control *controls;
363 u32 dwMaxVideoFrameBufferSize;
364 u8 bFrameIntervalType;
365 u32 dwDefaultFrameInterval;
366 u32 *dwFrameInterval;
379 unsigned int nframes;
380 struct uvc_frame *frame;
383 struct uvc_streaming_header {
389 /* The following fields are used by input headers only. */
391 u8 bStillCaptureMethod;
396 enum uvc_buffer_state {
397 UVC_BUF_STATE_IDLE = 0,
398 UVC_BUF_STATE_QUEUED = 1,
399 UVC_BUF_STATE_ACTIVE = 2,
400 UVC_BUF_STATE_READY = 3,
401 UVC_BUF_STATE_DONE = 4,
402 UVC_BUF_STATE_ERROR = 5,
406 struct vb2_v4l2_buffer buf;
407 struct list_head queue;
409 enum uvc_buffer_state state;
414 unsigned int bytesused;
418 /* Asynchronous buffer handling. */
422 #define UVC_QUEUE_DISCONNECTED (1 << 0)
423 #define UVC_QUEUE_DROP_CORRUPTED (1 << 1)
425 struct uvc_video_queue {
426 struct vb2_queue queue;
427 struct mutex mutex; /* Protects queue */
430 unsigned int buf_used;
432 spinlock_t irqlock; /* Protects irqqueue */
433 struct list_head irqqueue;
436 struct uvc_video_chain {
437 struct uvc_device *dev;
438 struct list_head list;
440 struct list_head entities; /* All entities */
441 struct uvc_entity *processing; /* Processing unit */
442 struct uvc_entity *selector; /* Selector unit */
444 struct mutex ctrl_mutex; /* Protects ctrl.info */
446 struct v4l2_prio_state prio; /* V4L2 priority state */
447 u32 caps; /* V4L2 chain-wide caps */
450 struct uvc_stats_frame {
451 unsigned int size; /* Number of bytes captured */
452 unsigned int first_data; /* Index of the first non-empty packet */
454 unsigned int nb_packets; /* Number of packets */
455 unsigned int nb_empty; /* Number of empty packets */
456 unsigned int nb_invalid; /* Number of packets with an invalid header */
457 unsigned int nb_errors; /* Number of packets with the error bit set */
459 unsigned int nb_pts; /* Number of packets with a PTS timestamp */
460 unsigned int nb_pts_diffs; /* Number of PTS differences inside a frame */
461 unsigned int last_pts_diff; /* Index of the last PTS difference */
462 bool has_initial_pts; /* Whether the first non-empty packet has a PTS */
463 bool has_early_pts; /* Whether a PTS is present before the first non-empty packet */
464 u32 pts; /* PTS of the last packet */
466 unsigned int nb_scr; /* Number of packets with a SCR timestamp */
467 unsigned int nb_scr_diffs; /* Number of SCR.STC differences inside a frame */
468 u16 scr_sof; /* SCR.SOF of the last packet */
469 u32 scr_stc; /* SCR.STC of the last packet */
472 struct uvc_stats_stream {
473 ktime_t start_ts; /* Stream start timestamp */
474 ktime_t stop_ts; /* Stream stop timestamp */
476 unsigned int nb_frames; /* Number of frames */
478 unsigned int nb_packets; /* Number of packets */
479 unsigned int nb_empty; /* Number of empty packets */
480 unsigned int nb_invalid; /* Number of packets with an invalid header */
481 unsigned int nb_errors; /* Number of packets with the error bit set */
483 unsigned int nb_pts_constant; /* Number of frames with constant PTS */
484 unsigned int nb_pts_early; /* Number of frames with early PTS */
485 unsigned int nb_pts_initial; /* Number of frames with initial PTS */
487 unsigned int nb_scr_count_ok; /* Number of frames with at least one SCR per non empty packet */
488 unsigned int nb_scr_diffs_ok; /* Number of frames with varying SCR.STC */
489 unsigned int scr_sof_count; /* STC.SOF counter accumulated since stream start */
490 unsigned int scr_sof; /* STC.SOF of the last packet */
491 unsigned int min_sof; /* Minimum STC.SOF value */
492 unsigned int max_sof; /* Maximum STC.SOF value */
495 #define UVC_METATADA_BUF_SIZE 1024
498 * struct uvc_copy_op: Context structure to schedule asynchronous memcpy
500 * @buf: active buf object for this operation
501 * @dst: copy destination address
502 * @src: copy source address
506 struct uvc_buffer *buf;
513 * struct uvc_urb - URB context management structure
515 * @urb: the URB described by this context structure
516 * @stream: UVC streaming context
517 * @buffer: memory storage for the URB
518 * @dma: DMA coherent addressing for the urb_buffer
519 * @async_operations: counter to indicate the number of copy operations
520 * @copy_operations: work descriptors for asynchronous copy operations
521 * @work: work queue entry for asynchronous decode
525 struct uvc_streaming *stream;
530 unsigned int async_operations;
531 struct uvc_copy_op copy_operations[UVC_MAX_PACKETS];
532 struct work_struct work;
535 struct uvc_streaming {
536 struct list_head list;
537 struct uvc_device *dev;
538 struct video_device vdev;
539 struct uvc_video_chain *chain;
542 struct usb_interface *intf;
546 struct uvc_streaming_header header;
547 enum v4l2_buf_type type;
549 unsigned int nformats;
550 struct uvc_format *format;
552 struct uvc_streaming_control ctrl;
553 struct uvc_format *def_format;
554 struct uvc_format *cur_format;
555 struct uvc_frame *cur_frame;
557 /* Protect access to ctrl, cur_format, cur_frame and hardware video
563 unsigned int frozen : 1;
564 struct uvc_video_queue queue;
565 struct workqueue_struct *async_wq;
566 void (*decode)(struct uvc_urb *uvc_urb, struct uvc_buffer *buf,
567 struct uvc_buffer *meta_buf);
570 struct video_device vdev;
571 struct uvc_video_queue queue;
575 /* Context data used by the bulk completion handler. */
578 unsigned int header_size;
581 u32 max_payload_size;
584 struct uvc_urb uvc_urb[UVC_URBS];
585 unsigned int urb_size;
591 struct dentry *debugfs_dir;
593 struct uvc_stats_frame frame;
594 struct uvc_stats_stream stream;
597 /* Timestamps support. */
599 struct uvc_clock_sample {
619 #define for_each_uvc_urb(uvc_urb, uvc_streaming) \
620 for ((uvc_urb) = &(uvc_streaming)->uvc_urb[0]; \
621 (uvc_urb) < &(uvc_streaming)->uvc_urb[UVC_URBS]; \
624 static inline u32 uvc_urb_index(const struct uvc_urb *uvc_urb)
626 return uvc_urb - &uvc_urb->stream->uvc_urb[0];
629 struct uvc_device_info {
635 struct usb_device *udev;
636 struct usb_interface *intf;
637 unsigned long warnings;
642 const struct uvc_device_info *info;
644 struct mutex lock; /* Protects users */
648 /* Video control interface */
649 #ifdef CONFIG_MEDIA_CONTROLLER
650 struct media_device mdev;
652 struct v4l2_device vdev;
656 struct list_head entities;
657 struct list_head chains;
659 /* Video Streaming interfaces */
660 struct list_head streams;
663 /* Status Interrupt Endpoint */
664 struct usb_host_endpoint *int_ep;
667 struct input_dev *input;
670 struct uvc_ctrl_work {
671 struct work_struct work;
673 struct uvc_video_chain *chain;
674 struct uvc_control *ctrl;
679 enum uvc_handle_state {
680 UVC_HANDLE_PASSIVE = 0,
681 UVC_HANDLE_ACTIVE = 1,
686 struct uvc_video_chain *chain;
687 struct uvc_streaming *stream;
688 enum uvc_handle_state state;
692 struct usb_driver driver;
695 /* ------------------------------------------------------------------------
696 * Debugging, printing and logging
699 #define UVC_TRACE_PROBE (1 << 0)
700 #define UVC_TRACE_DESCR (1 << 1)
701 #define UVC_TRACE_CONTROL (1 << 2)
702 #define UVC_TRACE_FORMAT (1 << 3)
703 #define UVC_TRACE_CAPTURE (1 << 4)
704 #define UVC_TRACE_CALLS (1 << 5)
705 #define UVC_TRACE_FRAME (1 << 7)
706 #define UVC_TRACE_SUSPEND (1 << 8)
707 #define UVC_TRACE_STATUS (1 << 9)
708 #define UVC_TRACE_VIDEO (1 << 10)
709 #define UVC_TRACE_STATS (1 << 11)
710 #define UVC_TRACE_CLOCK (1 << 12)
712 #define UVC_WARN_MINMAX 0
713 #define UVC_WARN_PROBE_DEF 1
714 #define UVC_WARN_XU_GET_RES 2
716 extern unsigned int uvc_clock_param;
717 extern unsigned int uvc_no_drop_param;
718 extern unsigned int uvc_trace_param;
719 extern unsigned int uvc_timeout_param;
720 extern unsigned int uvc_hw_timestamps_param;
722 #define uvc_trace(flag, msg...) \
724 if (uvc_trace_param & flag) \
725 printk(KERN_DEBUG "uvcvideo: " msg); \
728 #define uvc_warn_once(dev, warn, msg...) \
730 if (!test_and_set_bit(warn, &dev->warnings)) \
731 printk(KERN_INFO "uvcvideo: " msg); \
734 #define uvc_printk(level, msg...) \
735 printk(level "uvcvideo: " msg)
737 /* --------------------------------------------------------------------------
738 * Internal functions.
742 extern struct uvc_driver uvc_driver;
744 struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id);
746 /* Video buffers queue management. */
747 int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
749 void uvc_queue_release(struct uvc_video_queue *queue);
750 int uvc_request_buffers(struct uvc_video_queue *queue,
751 struct v4l2_requestbuffers *rb);
752 int uvc_query_buffer(struct uvc_video_queue *queue,
753 struct v4l2_buffer *v4l2_buf);
754 int uvc_create_buffers(struct uvc_video_queue *queue,
755 struct v4l2_create_buffers *v4l2_cb);
756 int uvc_queue_buffer(struct uvc_video_queue *queue,
757 struct media_device *mdev,
758 struct v4l2_buffer *v4l2_buf);
759 int uvc_export_buffer(struct uvc_video_queue *queue,
760 struct v4l2_exportbuffer *exp);
761 int uvc_dequeue_buffer(struct uvc_video_queue *queue,
762 struct v4l2_buffer *v4l2_buf, int nonblocking);
763 int uvc_queue_streamon(struct uvc_video_queue *queue, enum v4l2_buf_type type);
764 int uvc_queue_streamoff(struct uvc_video_queue *queue, enum v4l2_buf_type type);
765 void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
766 struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
767 struct uvc_buffer *buf);
768 struct uvc_buffer *uvc_queue_get_current_buffer(struct uvc_video_queue *queue);
769 void uvc_queue_buffer_release(struct uvc_buffer *buf);
770 int uvc_queue_mmap(struct uvc_video_queue *queue,
771 struct vm_area_struct *vma);
772 __poll_t uvc_queue_poll(struct uvc_video_queue *queue, struct file *file,
775 unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
776 unsigned long pgoff);
778 int uvc_queue_allocated(struct uvc_video_queue *queue);
779 static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
781 return vb2_is_streaming(&queue->queue);
785 extern const struct v4l2_ioctl_ops uvc_ioctl_ops;
786 extern const struct v4l2_file_operations uvc_fops;
788 /* Media controller */
789 int uvc_mc_register_entities(struct uvc_video_chain *chain);
790 void uvc_mc_cleanup_entity(struct uvc_entity *entity);
793 int uvc_video_init(struct uvc_streaming *stream);
794 int uvc_video_suspend(struct uvc_streaming *stream);
795 int uvc_video_resume(struct uvc_streaming *stream, int reset);
796 int uvc_video_start_streaming(struct uvc_streaming *stream);
797 void uvc_video_stop_streaming(struct uvc_streaming *stream);
798 int uvc_probe_video(struct uvc_streaming *stream,
799 struct uvc_streaming_control *probe);
800 int uvc_query_ctrl(struct uvc_device *dev, u8 query, u8 unit,
801 u8 intfnum, u8 cs, void *data, u16 size);
802 void uvc_video_clock_update(struct uvc_streaming *stream,
803 struct vb2_v4l2_buffer *vbuf,
804 struct uvc_buffer *buf);
805 int uvc_meta_register(struct uvc_streaming *stream);
807 int uvc_register_video_device(struct uvc_device *dev,
808 struct uvc_streaming *stream,
809 struct video_device *vdev,
810 struct uvc_video_queue *queue,
811 enum v4l2_buf_type type,
812 const struct v4l2_file_operations *fops,
813 const struct v4l2_ioctl_ops *ioctl_ops);
816 int uvc_status_init(struct uvc_device *dev);
817 void uvc_status_unregister(struct uvc_device *dev);
818 void uvc_status_cleanup(struct uvc_device *dev);
819 int uvc_status_start(struct uvc_device *dev, gfp_t flags);
820 void uvc_status_stop(struct uvc_device *dev);
823 extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops;
825 int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
826 struct v4l2_queryctrl *v4l2_ctrl);
827 int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
828 struct v4l2_querymenu *query_menu);
830 int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
831 const struct uvc_control_mapping *mapping);
832 int uvc_ctrl_init_device(struct uvc_device *dev);
833 void uvc_ctrl_cleanup_device(struct uvc_device *dev);
834 int uvc_ctrl_restore_values(struct uvc_device *dev);
835 bool uvc_ctrl_status_event(struct urb *urb, struct uvc_video_chain *chain,
836 struct uvc_control *ctrl, const u8 *data);
838 int uvc_ctrl_begin(struct uvc_video_chain *chain);
839 int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback,
840 const struct v4l2_ext_control *xctrls,
841 unsigned int xctrls_count);
842 static inline int uvc_ctrl_commit(struct uvc_fh *handle,
843 const struct v4l2_ext_control *xctrls,
844 unsigned int xctrls_count)
846 return __uvc_ctrl_commit(handle, 0, xctrls, xctrls_count);
848 static inline int uvc_ctrl_rollback(struct uvc_fh *handle)
850 return __uvc_ctrl_commit(handle, 1, NULL, 0);
853 int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl);
854 int uvc_ctrl_set(struct uvc_fh *handle, struct v4l2_ext_control *xctrl);
856 int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
857 struct uvc_xu_control_query *xqry);
859 /* Utility functions */
860 void uvc_simplify_fraction(u32 *numerator, u32 *denominator,
861 unsigned int n_terms, unsigned int threshold);
862 u32 uvc_fraction_to_interval(u32 numerator, u32 denominator);
863 struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts,
867 void uvc_video_decode_isight(struct uvc_urb *uvc_urb,
868 struct uvc_buffer *buf,
869 struct uvc_buffer *meta_buf);
871 /* debugfs and statistics */
872 void uvc_debugfs_init(void);
873 void uvc_debugfs_cleanup(void);
874 void uvc_debugfs_init_stream(struct uvc_streaming *stream);
875 void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream);
877 size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf,