4 #include <linux/kernel.h>
5 #include <linux/videodev2.h>
12 /* Data types for UVC control data */
13 #define UVC_CTRL_DATA_TYPE_RAW 0
14 #define UVC_CTRL_DATA_TYPE_SIGNED 1
15 #define UVC_CTRL_DATA_TYPE_UNSIGNED 2
16 #define UVC_CTRL_DATA_TYPE_BOOLEAN 3
17 #define UVC_CTRL_DATA_TYPE_ENUM 4
18 #define UVC_CTRL_DATA_TYPE_BITMASK 5
21 #define UVC_CONTROL_SET_CUR (1 << 0)
22 #define UVC_CONTROL_GET_CUR (1 << 1)
23 #define UVC_CONTROL_GET_MIN (1 << 2)
24 #define UVC_CONTROL_GET_MAX (1 << 3)
25 #define UVC_CONTROL_GET_RES (1 << 4)
26 #define UVC_CONTROL_GET_DEF (1 << 5)
27 /* Control should be saved at suspend and restored at resume. */
28 #define UVC_CONTROL_RESTORE (1 << 6)
29 /* Control can be updated by the camera. */
30 #define UVC_CONTROL_AUTO_UPDATE (1 << 7)
32 #define UVC_CONTROL_GET_RANGE (UVC_CONTROL_GET_CUR | UVC_CONTROL_GET_MIN | \
33 UVC_CONTROL_GET_MAX | UVC_CONTROL_GET_RES | \
36 struct uvc_xu_control_info {
44 struct uvc_xu_control_mapping {
52 enum v4l2_ctrl_type v4l2_type;
56 struct uvc_xu_control {
63 #define UVCIOC_CTRL_ADD _IOW('U', 1, struct uvc_xu_control_info)
64 #define UVCIOC_CTRL_MAP _IOWR('U', 2, struct uvc_xu_control_mapping)
65 #define UVCIOC_CTRL_GET _IOWR('U', 3, struct uvc_xu_control)
66 #define UVCIOC_CTRL_SET _IOW('U', 4, struct uvc_xu_control)
70 #include <linux/poll.h>
72 /* --------------------------------------------------------------------------
76 #define SC_UNDEFINED 0x00
77 #define SC_VIDEOCONTROL 0x01
78 #define SC_VIDEOSTREAMING 0x02
79 #define SC_VIDEO_INTERFACE_COLLECTION 0x03
81 #define PC_PROTOCOL_UNDEFINED 0x00
83 #define CS_UNDEFINED 0x20
84 #define CS_DEVICE 0x21
85 #define CS_CONFIGURATION 0x22
86 #define CS_STRING 0x23
87 #define CS_INTERFACE 0x24
88 #define CS_ENDPOINT 0x25
90 /* VideoControl class specific interface descriptor */
91 #define VC_DESCRIPTOR_UNDEFINED 0x00
92 #define VC_HEADER 0x01
93 #define VC_INPUT_TERMINAL 0x02
94 #define VC_OUTPUT_TERMINAL 0x03
95 #define VC_SELECTOR_UNIT 0x04
96 #define VC_PROCESSING_UNIT 0x05
97 #define VC_EXTENSION_UNIT 0x06
99 /* VideoStreaming class specific interface descriptor */
100 #define VS_UNDEFINED 0x00
101 #define VS_INPUT_HEADER 0x01
102 #define VS_OUTPUT_HEADER 0x02
103 #define VS_STILL_IMAGE_FRAME 0x03
104 #define VS_FORMAT_UNCOMPRESSED 0x04
105 #define VS_FRAME_UNCOMPRESSED 0x05
106 #define VS_FORMAT_MJPEG 0x06
107 #define VS_FRAME_MJPEG 0x07
108 #define VS_FORMAT_MPEG2TS 0x0a
109 #define VS_FORMAT_DV 0x0c
110 #define VS_COLORFORMAT 0x0d
111 #define VS_FORMAT_FRAME_BASED 0x10
112 #define VS_FRAME_FRAME_BASED 0x11
113 #define VS_FORMAT_STREAM_BASED 0x12
116 #define EP_UNDEFINED 0x00
117 #define EP_GENERAL 0x01
118 #define EP_ENDPOINT 0x02
119 #define EP_INTERRUPT 0x03
122 #define RC_UNDEFINED 0x00
129 #define GET_INFO 0x86
132 /* VideoControl interface controls */
133 #define VC_CONTROL_UNDEFINED 0x00
134 #define VC_VIDEO_POWER_MODE_CONTROL 0x01
135 #define VC_REQUEST_ERROR_CODE_CONTROL 0x02
137 /* Terminal controls */
138 #define TE_CONTROL_UNDEFINED 0x00
140 /* Selector Unit controls */
141 #define SU_CONTROL_UNDEFINED 0x00
142 #define SU_INPUT_SELECT_CONTROL 0x01
144 /* Camera Terminal controls */
145 #define CT_CONTROL_UNDEFINED 0x00
146 #define CT_SCANNING_MODE_CONTROL 0x01
147 #define CT_AE_MODE_CONTROL 0x02
148 #define CT_AE_PRIORITY_CONTROL 0x03
149 #define CT_EXPOSURE_TIME_ABSOLUTE_CONTROL 0x04
150 #define CT_EXPOSURE_TIME_RELATIVE_CONTROL 0x05
151 #define CT_FOCUS_ABSOLUTE_CONTROL 0x06
152 #define CT_FOCUS_RELATIVE_CONTROL 0x07
153 #define CT_FOCUS_AUTO_CONTROL 0x08
154 #define CT_IRIS_ABSOLUTE_CONTROL 0x09
155 #define CT_IRIS_RELATIVE_CONTROL 0x0a
156 #define CT_ZOOM_ABSOLUTE_CONTROL 0x0b
157 #define CT_ZOOM_RELATIVE_CONTROL 0x0c
158 #define CT_PANTILT_ABSOLUTE_CONTROL 0x0d
159 #define CT_PANTILT_RELATIVE_CONTROL 0x0e
160 #define CT_ROLL_ABSOLUTE_CONTROL 0x0f
161 #define CT_ROLL_RELATIVE_CONTROL 0x10
162 #define CT_PRIVACY_CONTROL 0x11
164 /* Processing Unit controls */
165 #define PU_CONTROL_UNDEFINED 0x00
166 #define PU_BACKLIGHT_COMPENSATION_CONTROL 0x01
167 #define PU_BRIGHTNESS_CONTROL 0x02
168 #define PU_CONTRAST_CONTROL 0x03
169 #define PU_GAIN_CONTROL 0x04
170 #define PU_POWER_LINE_FREQUENCY_CONTROL 0x05
171 #define PU_HUE_CONTROL 0x06
172 #define PU_SATURATION_CONTROL 0x07
173 #define PU_SHARPNESS_CONTROL 0x08
174 #define PU_GAMMA_CONTROL 0x09
175 #define PU_WHITE_BALANCE_TEMPERATURE_CONTROL 0x0a
176 #define PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL 0x0b
177 #define PU_WHITE_BALANCE_COMPONENT_CONTROL 0x0c
178 #define PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL 0x0d
179 #define PU_DIGITAL_MULTIPLIER_CONTROL 0x0e
180 #define PU_DIGITAL_MULTIPLIER_LIMIT_CONTROL 0x0f
181 #define PU_HUE_AUTO_CONTROL 0x10
182 #define PU_ANALOG_VIDEO_STANDARD_CONTROL 0x11
183 #define PU_ANALOG_LOCK_STATUS_CONTROL 0x12
185 #define LXU_MOTOR_PANTILT_RELATIVE_CONTROL 0x01
186 #define LXU_MOTOR_PANTILT_RESET_CONTROL 0x02
187 #define LXU_MOTOR_FOCUS_MOTOR_CONTROL 0x03
189 /* VideoStreaming interface controls */
190 #define VS_CONTROL_UNDEFINED 0x00
191 #define VS_PROBE_CONTROL 0x01
192 #define VS_COMMIT_CONTROL 0x02
193 #define VS_STILL_PROBE_CONTROL 0x03
194 #define VS_STILL_COMMIT_CONTROL 0x04
195 #define VS_STILL_IMAGE_TRIGGER_CONTROL 0x05
196 #define VS_STREAM_ERROR_CODE_CONTROL 0x06
197 #define VS_GENERATE_KEY_FRAME_CONTROL 0x07
198 #define VS_UPDATE_FRAME_SEGMENT_CONTROL 0x08
199 #define VS_SYNC_DELAY_CONTROL 0x09
201 #define TT_VENDOR_SPECIFIC 0x0100
202 #define TT_STREAMING 0x0101
204 /* Input Terminal types */
205 #define ITT_VENDOR_SPECIFIC 0x0200
206 #define ITT_CAMERA 0x0201
207 #define ITT_MEDIA_TRANSPORT_INPUT 0x0202
209 /* Output Terminal types */
210 #define OTT_VENDOR_SPECIFIC 0x0300
211 #define OTT_DISPLAY 0x0301
212 #define OTT_MEDIA_TRANSPORT_OUTPUT 0x0302
214 /* External Terminal types */
215 #define EXTERNAL_VENDOR_SPECIFIC 0x0400
216 #define COMPOSITE_CONNECTOR 0x0401
217 #define SVIDEO_CONNECTOR 0x0402
218 #define COMPONENT_CONNECTOR 0x0403
220 #define UVC_TERM_INPUT 0x0000
221 #define UVC_TERM_OUTPUT 0x8000
223 #define UVC_ENTITY_TYPE(entity) ((entity)->type & 0x7fff)
224 #define UVC_ENTITY_IS_UNIT(entity) (((entity)->type & 0xff00) == 0)
225 #define UVC_ENTITY_IS_TERM(entity) (((entity)->type & 0xff00) != 0)
226 #define UVC_ENTITY_IS_ITERM(entity) \
227 (((entity)->type & 0x8000) == UVC_TERM_INPUT)
228 #define UVC_ENTITY_IS_OTERM(entity) \
229 (((entity)->type & 0x8000) == UVC_TERM_OUTPUT)
231 #define UVC_STATUS_TYPE_CONTROL 1
232 #define UVC_STATUS_TYPE_STREAMING 2
234 /* ------------------------------------------------------------------------
237 #define UVC_GUID_UVC_CAMERA \
238 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
239 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}
240 #define UVC_GUID_UVC_OUTPUT \
241 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
242 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}
243 #define UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT \
244 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
245 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03}
246 #define UVC_GUID_UVC_PROCESSING \
247 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
248 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01}
249 #define UVC_GUID_UVC_SELECTOR \
250 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
251 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02}
253 #define UVC_GUID_LOGITECH_DEV_INFO \
254 {0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \
255 0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x1e}
256 #define UVC_GUID_LOGITECH_USER_HW \
257 {0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \
258 0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x1f}
259 #define UVC_GUID_LOGITECH_VIDEO \
260 {0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \
261 0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x50}
262 #define UVC_GUID_LOGITECH_MOTOR \
263 {0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \
264 0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x56}
266 #define UVC_GUID_FORMAT_MJPEG \
267 { 'M', 'J', 'P', 'G', 0x00, 0x00, 0x10, 0x00, \
268 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
269 #define UVC_GUID_FORMAT_YUY2 \
270 { 'Y', 'U', 'Y', '2', 0x00, 0x00, 0x10, 0x00, \
271 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
272 #define UVC_GUID_FORMAT_NV12 \
273 { 'N', 'V', '1', '2', 0x00, 0x00, 0x10, 0x00, \
274 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
275 #define UVC_GUID_FORMAT_YV12 \
276 { 'Y', 'V', '1', '2', 0x00, 0x00, 0x10, 0x00, \
277 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
278 #define UVC_GUID_FORMAT_I420 \
279 { 'I', '4', '2', '0', 0x00, 0x00, 0x10, 0x00, \
280 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
281 #define UVC_GUID_FORMAT_UYVY \
282 { 'U', 'Y', 'V', 'Y', 0x00, 0x00, 0x10, 0x00, \
283 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
284 #define UVC_GUID_FORMAT_Y800 \
285 { 'Y', '8', '0', '0', 0x00, 0x00, 0x10, 0x00, \
286 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
287 #define UVC_GUID_FORMAT_BY8 \
288 { 'B', 'Y', '8', ' ', 0x00, 0x00, 0x10, 0x00, \
289 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
292 /* ------------------------------------------------------------------------
293 * Driver specific constants.
296 #define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 1, 0)
298 /* Number of isochronous URBs. */
300 /* Maximum number of packets per isochronous URB. */
301 #define UVC_MAX_ISO_PACKETS 40
302 /* Maximum frame size in bytes, for sanity checking. */
303 #define UVC_MAX_FRAME_SIZE (16*1024*1024)
304 /* Maximum number of video buffers. */
305 #define UVC_MAX_VIDEO_BUFFERS 32
306 /* Maximum status buffer size in bytes of interrupt URB. */
307 #define UVC_MAX_STATUS_SIZE 16
309 #define UVC_CTRL_CONTROL_TIMEOUT 300
310 #define UVC_CTRL_STREAMING_TIMEOUT 1000
313 #define UVC_QUIRK_STATUS_INTERVAL 0x00000001
314 #define UVC_QUIRK_PROBE_MINMAX 0x00000002
315 #define UVC_QUIRK_PROBE_EXTRAFIELDS 0x00000004
316 #define UVC_QUIRK_BUILTIN_ISIGHT 0x00000008
317 #define UVC_QUIRK_STREAM_NO_FID 0x00000010
318 #define UVC_QUIRK_IGNORE_SELECTOR_UNIT 0x00000020
319 #define UVC_QUIRK_PRUNE_CONTROLS 0x00000040
322 #define UVC_FMT_FLAG_COMPRESSED 0x00000001
323 #define UVC_FMT_FLAG_STREAM 0x00000002
325 /* ------------------------------------------------------------------------
331 /* TODO: Put the most frequently accessed fields at the beginning of
332 * structures to maximize cache efficiency.
334 struct uvc_streaming_control {
338 __u32 dwFrameInterval;
342 __u16 wCompWindowSize;
344 __u32 dwMaxVideoFrameSize;
345 __u32 dwMaxPayloadTransferSize;
346 __u32 dwClockFrequency;
348 __u8 bPreferedVersion;
353 struct uvc_menu_info {
358 struct uvc_control_info {
359 struct list_head list;
360 struct list_head mappings;
370 struct uvc_control_mapping {
371 struct list_head list;
373 struct uvc_control_info *ctrl;
382 enum v4l2_ctrl_type v4l2_type;
385 struct uvc_menu_info *menu_info;
388 __s32 (*get) (struct uvc_control_mapping *mapping, __u8 query,
390 void (*set) (struct uvc_control_mapping *mapping, __s32 value,
395 struct uvc_entity *entity;
396 struct uvc_control_info *info;
398 __u8 index; /* Used to match the uvc_control entry with a
407 struct uvc_format_desc {
413 /* The term 'entity' refers to both UVC units and UVC terminals.
415 * The type field is either the terminal type (wTerminalType in the terminal
416 * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor).
417 * As the bDescriptorSubtype field is one byte long, the type value will
418 * always have a null MSB for units. All terminal types defined by the UVC
419 * specification have a non-null MSB, so it is safe to use the MSB to
420 * differentiate between units and terminals as long as the descriptor parsing
421 * code makes sure terminal types have a non-null MSB.
423 * For terminals, the type's most significant bit stores the terminal
424 * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should
425 * always be accessed with the UVC_ENTITY_* macros and never directly.
429 struct list_head list; /* Entity as part of a UVC device. */
430 struct list_head chain; /* Entity as part of a video device
438 __u16 wObjectiveFocalLengthMin;
439 __u16 wObjectiveFocalLengthMax;
440 __u16 wOcularFocalLength;
448 __u8 bTransportModeSize;
449 __u8 *bmTransportModes;
458 __u16 wMaxMultiplier;
461 __u8 bmVideoStandards;
470 __u8 guidExtensionCode[16];
476 __u8 *bmControlsType;
480 unsigned int ncontrols;
481 struct uvc_control *controls;
491 __u32 dwMaxVideoFrameBufferSize;
492 __u8 bFrameIntervalType;
493 __u32 dwDefaultFrameInterval;
494 __u32 *dwFrameInterval;
507 unsigned int nframes;
508 struct uvc_frame *frame;
511 struct uvc_streaming_header {
513 __u8 bEndpointAddress;
517 /* The following fields are used by input headers only. */
519 __u8 bStillCaptureMethod;
520 __u8 bTriggerSupport;
524 struct uvc_streaming {
525 struct list_head list;
527 struct usb_interface *intf;
531 struct uvc_streaming_header header;
533 unsigned int nformats;
534 struct uvc_format *format;
536 struct uvc_streaming_control ctrl;
537 struct uvc_format *cur_format;
538 struct uvc_frame *cur_frame;
543 enum uvc_buffer_state {
544 UVC_BUF_STATE_IDLE = 0,
545 UVC_BUF_STATE_QUEUED = 1,
546 UVC_BUF_STATE_ACTIVE = 2,
547 UVC_BUF_STATE_DONE = 3,
548 UVC_BUF_STATE_ERROR = 4,
552 unsigned long vma_use_count;
553 struct list_head stream;
555 /* Touched by interrupt handler. */
556 struct v4l2_buffer buf;
557 struct list_head queue;
558 wait_queue_head_t wait;
559 enum uvc_buffer_state state;
562 #define UVC_QUEUE_STREAMING (1 << 0)
563 #define UVC_QUEUE_DISCONNECTED (1 << 1)
564 #define UVC_QUEUE_DROP_INCOMPLETE (1 << 2)
566 struct uvc_video_queue {
572 unsigned int buf_size;
573 struct uvc_buffer buffer[UVC_MAX_VIDEO_BUFFERS];
574 struct mutex mutex; /* protects buffers and mainqueue */
575 spinlock_t irqlock; /* protects irqqueue */
577 struct list_head mainqueue;
578 struct list_head irqqueue;
581 struct uvc_video_device {
582 struct uvc_device *dev;
583 struct video_device *vdev;
585 unsigned int frozen : 1;
587 struct list_head iterms;
588 struct uvc_entity *oterm;
589 struct uvc_entity *processing;
590 struct uvc_entity *selector;
591 struct list_head extensions;
592 struct mutex ctrl_mutex;
594 struct uvc_video_queue queue;
596 /* Video streaming object, must always be non-NULL. */
597 struct uvc_streaming *streaming;
599 void (*decode) (struct urb *urb, struct uvc_video_device *video,
600 struct uvc_buffer *buf);
602 /* Context data used by the bulk completion handler. */
605 unsigned int header_size;
608 __u32 max_payload_size;
611 struct urb *urb[UVC_URBS];
612 char *urb_buffer[UVC_URBS];
613 dma_addr_t urb_dma[UVC_URBS];
614 unsigned int urb_size;
619 enum uvc_device_state {
620 UVC_DEV_DISCONNECTED = 1,
624 struct usb_device *udev;
625 struct usb_interface *intf;
626 unsigned long warnings;
631 enum uvc_device_state state;
633 struct list_head list;
635 /* Video control interface */
637 __u32 clock_frequency;
639 struct list_head entities;
641 struct uvc_video_device video;
643 /* Status Interrupt Endpoint */
644 struct usb_host_endpoint *int_ep;
647 struct input_dev *input;
649 /* Video Streaming interfaces */
650 struct list_head streaming;
653 enum uvc_handle_state {
654 UVC_HANDLE_PASSIVE = 0,
655 UVC_HANDLE_ACTIVE = 1,
659 struct uvc_video_device *device;
660 enum uvc_handle_state state;
664 struct usb_driver driver;
666 struct mutex open_mutex; /* protects from open/disconnect race */
668 struct list_head devices; /* struct uvc_device list */
669 struct list_head controls; /* struct uvc_control_info list */
670 struct mutex ctrl_mutex; /* protects controls and devices
674 /* ------------------------------------------------------------------------
675 * Debugging, printing and logging
678 #define UVC_TRACE_PROBE (1 << 0)
679 #define UVC_TRACE_DESCR (1 << 1)
680 #define UVC_TRACE_CONTROL (1 << 2)
681 #define UVC_TRACE_FORMAT (1 << 3)
682 #define UVC_TRACE_CAPTURE (1 << 4)
683 #define UVC_TRACE_CALLS (1 << 5)
684 #define UVC_TRACE_IOCTL (1 << 6)
685 #define UVC_TRACE_FRAME (1 << 7)
686 #define UVC_TRACE_SUSPEND (1 << 8)
687 #define UVC_TRACE_STATUS (1 << 9)
689 #define UVC_WARN_MINMAX 0
690 #define UVC_WARN_PROBE_DEF 1
692 extern unsigned int uvc_no_drop_param;
693 extern unsigned int uvc_trace_param;
695 #define uvc_trace(flag, msg...) \
697 if (uvc_trace_param & flag) \
698 printk(KERN_DEBUG "uvcvideo: " msg); \
701 #define uvc_warn_once(dev, warn, msg...) \
703 if (!test_and_set_bit(warn, &dev->warnings)) \
704 printk(KERN_INFO "uvcvideo: " msg); \
707 #define uvc_printk(level, msg...) \
708 printk(level "uvcvideo: " msg)
710 #define UVC_GUID_FORMAT "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-" \
711 "%02x%02x%02x%02x%02x%02x"
712 #define UVC_GUID_ARGS(guid) \
713 (guid)[3], (guid)[2], (guid)[1], (guid)[0], \
714 (guid)[5], (guid)[4], \
715 (guid)[7], (guid)[6], \
716 (guid)[8], (guid)[9], \
717 (guid)[10], (guid)[11], (guid)[12], \
718 (guid)[13], (guid)[14], (guid)[15]
720 /* --------------------------------------------------------------------------
721 * Internal functions.
725 extern struct uvc_driver uvc_driver;
726 extern void uvc_delete(struct kref *kref);
728 /* Video buffers queue management. */
729 extern void uvc_queue_init(struct uvc_video_queue *queue);
730 extern int uvc_alloc_buffers(struct uvc_video_queue *queue,
731 unsigned int nbuffers, unsigned int buflength);
732 extern int uvc_free_buffers(struct uvc_video_queue *queue);
733 extern int uvc_query_buffer(struct uvc_video_queue *queue,
734 struct v4l2_buffer *v4l2_buf);
735 extern int uvc_queue_buffer(struct uvc_video_queue *queue,
736 struct v4l2_buffer *v4l2_buf);
737 extern int uvc_dequeue_buffer(struct uvc_video_queue *queue,
738 struct v4l2_buffer *v4l2_buf, int nonblocking);
739 extern int uvc_queue_enable(struct uvc_video_queue *queue, int enable);
740 extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
741 extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
742 struct uvc_buffer *buf);
743 extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue,
744 struct file *file, poll_table *wait);
745 static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
747 return queue->flags & UVC_QUEUE_STREAMING;
751 extern struct file_operations uvc_fops;
754 extern int uvc_video_init(struct uvc_video_device *video);
755 extern int uvc_video_suspend(struct uvc_video_device *video);
756 extern int uvc_video_resume(struct uvc_video_device *video);
757 extern int uvc_video_enable(struct uvc_video_device *video, int enable);
758 extern int uvc_probe_video(struct uvc_video_device *video,
759 struct uvc_streaming_control *probe);
760 extern int uvc_commit_video(struct uvc_video_device *video,
761 struct uvc_streaming_control *ctrl);
762 extern int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit,
763 __u8 intfnum, __u8 cs, void *data, __u16 size);
766 extern int uvc_status_init(struct uvc_device *dev);
767 extern void uvc_status_cleanup(struct uvc_device *dev);
768 extern int uvc_status_suspend(struct uvc_device *dev);
769 extern int uvc_status_resume(struct uvc_device *dev);
772 extern struct uvc_control *uvc_find_control(struct uvc_video_device *video,
773 __u32 v4l2_id, struct uvc_control_mapping **mapping);
774 extern int uvc_query_v4l2_ctrl(struct uvc_video_device *video,
775 struct v4l2_queryctrl *v4l2_ctrl);
777 extern int uvc_ctrl_add_info(struct uvc_control_info *info);
778 extern int uvc_ctrl_add_mapping(struct uvc_control_mapping *mapping);
779 extern int uvc_ctrl_init_device(struct uvc_device *dev);
780 extern void uvc_ctrl_cleanup_device(struct uvc_device *dev);
781 extern int uvc_ctrl_resume_device(struct uvc_device *dev);
782 extern void uvc_ctrl_init(void);
784 extern int uvc_ctrl_begin(struct uvc_video_device *video);
785 extern int __uvc_ctrl_commit(struct uvc_video_device *video, int rollback);
786 static inline int uvc_ctrl_commit(struct uvc_video_device *video)
788 return __uvc_ctrl_commit(video, 0);
790 static inline int uvc_ctrl_rollback(struct uvc_video_device *video)
792 return __uvc_ctrl_commit(video, 1);
795 extern int uvc_ctrl_get(struct uvc_video_device *video,
796 struct v4l2_ext_control *xctrl);
797 extern int uvc_ctrl_set(struct uvc_video_device *video,
798 struct v4l2_ext_control *xctrl);
800 extern int uvc_xu_ctrl_query(struct uvc_video_device *video,
801 struct uvc_xu_control *ctrl, int set);
803 /* Utility functions */
804 extern void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
805 unsigned int n_terms, unsigned int threshold);
806 extern uint32_t uvc_fraction_to_interval(uint32_t numerator,
807 uint32_t denominator);
808 extern struct usb_host_endpoint *uvc_find_endpoint(
809 struct usb_host_interface *alts, __u8 epaddr);
812 void uvc_video_decode_isight(struct urb *urb, struct uvc_video_device *video,
813 struct uvc_buffer *buf);
815 #endif /* __KERNEL__ */