1 #ifndef _USB_VIDEO_H_ 2 #define _USB_VIDEO_H_ 3 4 #ifndef __KERNEL__ 5 #error "The uvcvideo.h header is deprecated, use linux/uvcvideo.h instead." 6 #endif /* __KERNEL__ */ 7 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-core.h> 19 20 /* -------------------------------------------------------------------------- 21 * UVC constants 22 */ 23 24 #define UVC_TERM_INPUT 0x0000 25 #define UVC_TERM_OUTPUT 0x8000 26 #define UVC_TERM_DIRECTION(term) ((term)->type & 0x8000) 27 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) 37 38 39 /* ------------------------------------------------------------------------ 40 * GUIDs 41 */ 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} 57 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_RGBP \ 98 { 'R', 'G', 'B', 'P', 0x00, 0x00, 0x10, 0x00, \ 99 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} 100 #define UVC_GUID_FORMAT_M420 \ 101 { 'M', '4', '2', '0', 0x00, 0x00, 0x10, 0x00, \ 102 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} 103 104 #define UVC_GUID_FORMAT_H264 \ 105 { 'H', '2', '6', '4', 0x00, 0x00, 0x10, 0x00, \ 106 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} 107 108 /* ------------------------------------------------------------------------ 109 * Driver specific constants. 110 */ 111 112 #define DRIVER_VERSION "1.1.1" 113 114 /* Number of isochronous URBs. */ 115 #define UVC_URBS 5 116 /* Maximum number of packets per URB. */ 117 #define UVC_MAX_PACKETS 32 118 /* Maximum number of video buffers. */ 119 #define UVC_MAX_VIDEO_BUFFERS 32 120 /* Maximum status buffer size in bytes of interrupt URB. */ 121 #define UVC_MAX_STATUS_SIZE 16 122 123 #define UVC_CTRL_CONTROL_TIMEOUT 300 124 #define UVC_CTRL_STREAMING_TIMEOUT 5000 125 126 /* Maximum allowed number of control mappings per device */ 127 #define UVC_MAX_CONTROL_MAPPINGS 1024 128 #define UVC_MAX_CONTROL_MENU_ENTRIES 32 129 130 /* Devices quirks */ 131 #define UVC_QUIRK_STATUS_INTERVAL 0x00000001 132 #define UVC_QUIRK_PROBE_MINMAX 0x00000002 133 #define UVC_QUIRK_PROBE_EXTRAFIELDS 0x00000004 134 #define UVC_QUIRK_BUILTIN_ISIGHT 0x00000008 135 #define UVC_QUIRK_STREAM_NO_FID 0x00000010 136 #define UVC_QUIRK_IGNORE_SELECTOR_UNIT 0x00000020 137 #define UVC_QUIRK_FIX_BANDWIDTH 0x00000080 138 #define UVC_QUIRK_PROBE_DEF 0x00000100 139 #define UVC_QUIRK_RESTRICT_FRAME_RATE 0x00000200 140 141 /* Format flags */ 142 #define UVC_FMT_FLAG_COMPRESSED 0x00000001 143 #define UVC_FMT_FLAG_STREAM 0x00000002 144 145 /* ------------------------------------------------------------------------ 146 * Structures. 147 */ 148 149 struct uvc_device; 150 151 /* TODO: Put the most frequently accessed fields at the beginning of 152 * structures to maximize cache efficiency. 153 */ 154 struct uvc_control_info { 155 struct list_head mappings; 156 157 __u8 entity[16]; 158 __u8 index; /* Bit index in bmControls */ 159 __u8 selector; 160 161 __u16 size; 162 __u32 flags; 163 }; 164 165 struct uvc_control_mapping { 166 struct list_head list; 167 struct list_head ev_subs; 168 169 __u32 id; 170 __u8 name[32]; 171 __u8 entity[16]; 172 __u8 selector; 173 174 __u8 size; 175 __u8 offset; 176 enum v4l2_ctrl_type v4l2_type; 177 __u32 data_type; 178 179 struct uvc_menu_info *menu_info; 180 __u32 menu_count; 181 182 __u32 master_id; 183 __s32 master_manual; 184 __u32 slave_ids[2]; 185 186 __s32 (*get) (struct uvc_control_mapping *mapping, __u8 query, 187 const __u8 *data); 188 void (*set) (struct uvc_control_mapping *mapping, __s32 value, 189 __u8 *data); 190 }; 191 192 struct uvc_control { 193 struct uvc_entity *entity; 194 struct uvc_control_info info; 195 196 __u8 index; /* Used to match the uvc_control entry with a 197 uvc_control_info. */ 198 __u8 dirty:1, 199 loaded:1, 200 modified:1, 201 cached:1, 202 initialized:1; 203 204 __u8 *uvc_data; 205 }; 206 207 struct uvc_format_desc { 208 char *name; 209 __u8 guid[16]; 210 __u32 fcc; 211 }; 212 213 /* The term 'entity' refers to both UVC units and UVC terminals. 214 * 215 * The type field is either the terminal type (wTerminalType in the terminal 216 * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor). 217 * As the bDescriptorSubtype field is one byte long, the type value will 218 * always have a null MSB for units. All terminal types defined by the UVC 219 * specification have a non-null MSB, so it is safe to use the MSB to 220 * differentiate between units and terminals as long as the descriptor parsing 221 * code makes sure terminal types have a non-null MSB. 222 * 223 * For terminals, the type's most significant bit stores the terminal 224 * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should 225 * always be accessed with the UVC_ENTITY_* macros and never directly. 226 */ 227 228 #define UVC_ENTITY_FLAG_DEFAULT (1 << 0) 229 230 struct uvc_entity { 231 struct list_head list; /* Entity as part of a UVC device. */ 232 struct list_head chain; /* Entity as part of a video device 233 * chain. */ 234 unsigned int flags; 235 236 __u8 id; 237 __u16 type; 238 char name[64]; 239 240 /* Media controller-related fields. */ 241 struct video_device *vdev; 242 struct v4l2_subdev subdev; 243 unsigned int num_pads; 244 unsigned int num_links; 245 struct media_pad *pads; 246 247 union { 248 struct { 249 __u16 wObjectiveFocalLengthMin; 250 __u16 wObjectiveFocalLengthMax; 251 __u16 wOcularFocalLength; 252 __u8 bControlSize; 253 __u8 *bmControls; 254 } camera; 255 256 struct { 257 __u8 bControlSize; 258 __u8 *bmControls; 259 __u8 bTransportModeSize; 260 __u8 *bmTransportModes; 261 } media; 262 263 struct { 264 } output; 265 266 struct { 267 __u16 wMaxMultiplier; 268 __u8 bControlSize; 269 __u8 *bmControls; 270 __u8 bmVideoStandards; 271 } processing; 272 273 struct { 274 } selector; 275 276 struct { 277 __u8 guidExtensionCode[16]; 278 __u8 bNumControls; 279 __u8 bControlSize; 280 __u8 *bmControls; 281 __u8 *bmControlsType; 282 } extension; 283 }; 284 285 __u8 bNrInPins; 286 __u8 *baSourceID; 287 288 unsigned int ncontrols; 289 struct uvc_control *controls; 290 }; 291 292 struct uvc_frame { 293 __u8 bFrameIndex; 294 __u8 bmCapabilities; 295 __u16 wWidth; 296 __u16 wHeight; 297 __u32 dwMinBitRate; 298 __u32 dwMaxBitRate; 299 __u32 dwMaxVideoFrameBufferSize; 300 __u8 bFrameIntervalType; 301 __u32 dwDefaultFrameInterval; 302 __u32 *dwFrameInterval; 303 }; 304 305 struct uvc_format { 306 __u8 type; 307 __u8 index; 308 __u8 bpp; 309 __u8 colorspace; 310 __u32 fcc; 311 __u32 flags; 312 313 char name[32]; 314 315 unsigned int nframes; 316 struct uvc_frame *frame; 317 }; 318 319 struct uvc_streaming_header { 320 __u8 bNumFormats; 321 __u8 bEndpointAddress; 322 __u8 bTerminalLink; 323 __u8 bControlSize; 324 __u8 *bmaControls; 325 /* The following fields are used by input headers only. */ 326 __u8 bmInfo; 327 __u8 bStillCaptureMethod; 328 __u8 bTriggerSupport; 329 __u8 bTriggerUsage; 330 }; 331 332 enum uvc_buffer_state { 333 UVC_BUF_STATE_IDLE = 0, 334 UVC_BUF_STATE_QUEUED = 1, 335 UVC_BUF_STATE_ACTIVE = 2, 336 UVC_BUF_STATE_READY = 3, 337 UVC_BUF_STATE_DONE = 4, 338 UVC_BUF_STATE_ERROR = 5, 339 }; 340 341 struct uvc_buffer { 342 struct vb2_buffer buf; 343 struct list_head queue; 344 345 enum uvc_buffer_state state; 346 unsigned int error; 347 348 void *mem; 349 unsigned int length; 350 unsigned int bytesused; 351 352 u32 pts; 353 }; 354 355 #define UVC_QUEUE_DISCONNECTED (1 << 0) 356 #define UVC_QUEUE_DROP_CORRUPTED (1 << 1) 357 358 struct uvc_video_queue { 359 struct vb2_queue queue; 360 struct mutex mutex; /* Protects queue */ 361 362 unsigned int flags; 363 unsigned int buf_used; 364 365 spinlock_t irqlock; /* Protects irqqueue */ 366 struct list_head irqqueue; 367 }; 368 369 struct uvc_video_chain { 370 struct uvc_device *dev; 371 struct list_head list; 372 373 struct list_head entities; /* All entities */ 374 struct uvc_entity *processing; /* Processing unit */ 375 struct uvc_entity *selector; /* Selector unit */ 376 377 struct mutex ctrl_mutex; /* Protects ctrl.info */ 378 379 struct v4l2_prio_state prio; /* V4L2 priority state */ 380 u32 caps; /* V4L2 chain-wide caps */ 381 }; 382 383 struct uvc_stats_frame { 384 unsigned int size; /* Number of bytes captured */ 385 unsigned int first_data; /* Index of the first non-empty packet */ 386 387 unsigned int nb_packets; /* Number of packets */ 388 unsigned int nb_empty; /* Number of empty packets */ 389 unsigned int nb_invalid; /* Number of packets with an invalid header */ 390 unsigned int nb_errors; /* Number of packets with the error bit set */ 391 392 unsigned int nb_pts; /* Number of packets with a PTS timestamp */ 393 unsigned int nb_pts_diffs; /* Number of PTS differences inside a frame */ 394 unsigned int last_pts_diff; /* Index of the last PTS difference */ 395 bool has_initial_pts; /* Whether the first non-empty packet has a PTS */ 396 bool has_early_pts; /* Whether a PTS is present before the first non-empty packet */ 397 u32 pts; /* PTS of the last packet */ 398 399 unsigned int nb_scr; /* Number of packets with a SCR timestamp */ 400 unsigned int nb_scr_diffs; /* Number of SCR.STC differences inside a frame */ 401 u16 scr_sof; /* SCR.SOF of the last packet */ 402 u32 scr_stc; /* SCR.STC of the last packet */ 403 }; 404 405 struct uvc_stats_stream { 406 struct timespec start_ts; /* Stream start timestamp */ 407 struct timespec stop_ts; /* Stream stop timestamp */ 408 409 unsigned int nb_frames; /* Number of frames */ 410 411 unsigned int nb_packets; /* Number of packets */ 412 unsigned int nb_empty; /* Number of empty packets */ 413 unsigned int nb_invalid; /* Number of packets with an invalid header */ 414 unsigned int nb_errors; /* Number of packets with the error bit set */ 415 416 unsigned int nb_pts_constant; /* Number of frames with constant PTS */ 417 unsigned int nb_pts_early; /* Number of frames with early PTS */ 418 unsigned int nb_pts_initial; /* Number of frames with initial PTS */ 419 420 unsigned int nb_scr_count_ok; /* Number of frames with at least one SCR per non empty packet */ 421 unsigned int nb_scr_diffs_ok; /* Number of frames with varying SCR.STC */ 422 unsigned int scr_sof_count; /* STC.SOF counter accumulated since stream start */ 423 unsigned int scr_sof; /* STC.SOF of the last packet */ 424 unsigned int min_sof; /* Minimum STC.SOF value */ 425 unsigned int max_sof; /* Maximum STC.SOF value */ 426 }; 427 428 struct uvc_streaming { 429 struct list_head list; 430 struct uvc_device *dev; 431 struct video_device *vdev; 432 struct uvc_video_chain *chain; 433 atomic_t active; 434 435 struct usb_interface *intf; 436 int intfnum; 437 __u16 maxpsize; 438 439 struct uvc_streaming_header header; 440 enum v4l2_buf_type type; 441 442 unsigned int nformats; 443 struct uvc_format *format; 444 445 struct uvc_streaming_control ctrl; 446 struct uvc_format *def_format; 447 struct uvc_format *cur_format; 448 struct uvc_frame *cur_frame; 449 /* Protect access to ctrl, cur_format, cur_frame and hardware video 450 * probe control. 451 */ 452 struct mutex mutex; 453 454 /* Buffers queue. */ 455 unsigned int frozen : 1; 456 struct uvc_video_queue queue; 457 void (*decode) (struct urb *urb, struct uvc_streaming *video, 458 struct uvc_buffer *buf); 459 460 /* Context data used by the bulk completion handler. */ 461 struct { 462 __u8 header[256]; 463 unsigned int header_size; 464 int skip_payload; 465 __u32 payload_size; 466 __u32 max_payload_size; 467 } bulk; 468 469 struct urb *urb[UVC_URBS]; 470 char *urb_buffer[UVC_URBS]; 471 dma_addr_t urb_dma[UVC_URBS]; 472 unsigned int urb_size; 473 474 __u32 sequence; 475 __u8 last_fid; 476 477 /* debugfs */ 478 struct dentry *debugfs_dir; 479 struct { 480 struct uvc_stats_frame frame; 481 struct uvc_stats_stream stream; 482 } stats; 483 484 /* Timestamps support. */ 485 struct uvc_clock { 486 struct uvc_clock_sample { 487 u32 dev_stc; 488 u16 dev_sof; 489 struct timespec host_ts; 490 u16 host_sof; 491 } *samples; 492 493 unsigned int head; 494 unsigned int count; 495 unsigned int size; 496 497 u16 last_sof; 498 u16 sof_offset; 499 500 spinlock_t lock; 501 } clock; 502 }; 503 504 enum uvc_device_state { 505 UVC_DEV_DISCONNECTED = 1, 506 }; 507 508 struct uvc_device { 509 struct usb_device *udev; 510 struct usb_interface *intf; 511 unsigned long warnings; 512 __u32 quirks; 513 int intfnum; 514 char name[32]; 515 516 enum uvc_device_state state; 517 struct mutex lock; /* Protects users */ 518 unsigned int users; 519 atomic_t nmappings; 520 521 /* Video control interface */ 522 #ifdef CONFIG_MEDIA_CONTROLLER 523 struct media_device mdev; 524 #endif 525 struct v4l2_device vdev; 526 __u16 uvc_version; 527 __u32 clock_frequency; 528 529 struct list_head entities; 530 struct list_head chains; 531 532 /* Video Streaming interfaces */ 533 struct list_head streams; 534 atomic_t nstreams; 535 536 /* Status Interrupt Endpoint */ 537 struct usb_host_endpoint *int_ep; 538 struct urb *int_urb; 539 __u8 *status; 540 struct input_dev *input; 541 char input_phys[64]; 542 }; 543 544 enum uvc_handle_state { 545 UVC_HANDLE_PASSIVE = 0, 546 UVC_HANDLE_ACTIVE = 1, 547 }; 548 549 struct uvc_fh { 550 struct v4l2_fh vfh; 551 struct uvc_video_chain *chain; 552 struct uvc_streaming *stream; 553 enum uvc_handle_state state; 554 }; 555 556 struct uvc_driver { 557 struct usb_driver driver; 558 }; 559 560 /* ------------------------------------------------------------------------ 561 * Debugging, printing and logging 562 */ 563 564 #define UVC_TRACE_PROBE (1 << 0) 565 #define UVC_TRACE_DESCR (1 << 1) 566 #define UVC_TRACE_CONTROL (1 << 2) 567 #define UVC_TRACE_FORMAT (1 << 3) 568 #define UVC_TRACE_CAPTURE (1 << 4) 569 #define UVC_TRACE_CALLS (1 << 5) 570 #define UVC_TRACE_IOCTL (1 << 6) 571 #define UVC_TRACE_FRAME (1 << 7) 572 #define UVC_TRACE_SUSPEND (1 << 8) 573 #define UVC_TRACE_STATUS (1 << 9) 574 #define UVC_TRACE_VIDEO (1 << 10) 575 #define UVC_TRACE_STATS (1 << 11) 576 #define UVC_TRACE_CLOCK (1 << 12) 577 578 #define UVC_WARN_MINMAX 0 579 #define UVC_WARN_PROBE_DEF 1 580 #define UVC_WARN_XU_GET_RES 2 581 582 extern unsigned int uvc_clock_param; 583 extern unsigned int uvc_no_drop_param; 584 extern unsigned int uvc_trace_param; 585 extern unsigned int uvc_timeout_param; 586 587 #define uvc_trace(flag, msg...) \ 588 do { \ 589 if (uvc_trace_param & flag) \ 590 printk(KERN_DEBUG "uvcvideo: " msg); \ 591 } while (0) 592 593 #define uvc_warn_once(dev, warn, msg...) \ 594 do { \ 595 if (!test_and_set_bit(warn, &dev->warnings)) \ 596 printk(KERN_INFO "uvcvideo: " msg); \ 597 } while (0) 598 599 #define uvc_printk(level, msg...) \ 600 printk(level "uvcvideo: " msg) 601 602 /* -------------------------------------------------------------------------- 603 * Internal functions. 604 */ 605 606 /* Core driver */ 607 extern struct uvc_driver uvc_driver; 608 609 extern struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id); 610 611 /* Video buffers queue management. */ 612 extern int uvc_queue_init(struct uvc_video_queue *queue, 613 enum v4l2_buf_type type, int drop_corrupted); 614 extern int uvc_alloc_buffers(struct uvc_video_queue *queue, 615 struct v4l2_requestbuffers *rb); 616 extern void uvc_free_buffers(struct uvc_video_queue *queue); 617 extern int uvc_query_buffer(struct uvc_video_queue *queue, 618 struct v4l2_buffer *v4l2_buf); 619 extern int uvc_queue_buffer(struct uvc_video_queue *queue, 620 struct v4l2_buffer *v4l2_buf); 621 extern int uvc_dequeue_buffer(struct uvc_video_queue *queue, 622 struct v4l2_buffer *v4l2_buf, int nonblocking); 623 extern int uvc_queue_enable(struct uvc_video_queue *queue, int enable); 624 extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect); 625 extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue, 626 struct uvc_buffer *buf); 627 extern int uvc_queue_mmap(struct uvc_video_queue *queue, 628 struct vm_area_struct *vma); 629 extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue, 630 struct file *file, poll_table *wait); 631 #ifndef CONFIG_MMU 632 extern unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue, 633 unsigned long pgoff); 634 #endif 635 extern int uvc_queue_allocated(struct uvc_video_queue *queue); 636 static inline int uvc_queue_streaming(struct uvc_video_queue *queue) 637 { 638 return vb2_is_streaming(&queue->queue); 639 } 640 641 /* V4L2 interface */ 642 extern const struct v4l2_file_operations uvc_fops; 643 644 /* Media controller */ 645 extern int uvc_mc_register_entities(struct uvc_video_chain *chain); 646 extern void uvc_mc_cleanup_entity(struct uvc_entity *entity); 647 648 /* Video */ 649 extern int uvc_video_init(struct uvc_streaming *stream); 650 extern int uvc_video_suspend(struct uvc_streaming *stream); 651 extern int uvc_video_resume(struct uvc_streaming *stream, int reset); 652 extern int uvc_video_enable(struct uvc_streaming *stream, int enable); 653 extern int uvc_probe_video(struct uvc_streaming *stream, 654 struct uvc_streaming_control *probe); 655 extern int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit, 656 __u8 intfnum, __u8 cs, void *data, __u16 size); 657 void uvc_video_clock_update(struct uvc_streaming *stream, 658 struct v4l2_buffer *v4l2_buf, 659 struct uvc_buffer *buf); 660 661 /* Status */ 662 extern int uvc_status_init(struct uvc_device *dev); 663 extern void uvc_status_cleanup(struct uvc_device *dev); 664 extern int uvc_status_start(struct uvc_device *dev, gfp_t flags); 665 extern void uvc_status_stop(struct uvc_device *dev); 666 667 /* Controls */ 668 extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops; 669 670 extern int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, 671 struct v4l2_queryctrl *v4l2_ctrl); 672 extern int uvc_query_v4l2_menu(struct uvc_video_chain *chain, 673 struct v4l2_querymenu *query_menu); 674 675 extern int uvc_ctrl_add_mapping(struct uvc_video_chain *chain, 676 const struct uvc_control_mapping *mapping); 677 extern int uvc_ctrl_init_device(struct uvc_device *dev); 678 extern void uvc_ctrl_cleanup_device(struct uvc_device *dev); 679 extern int uvc_ctrl_resume_device(struct uvc_device *dev); 680 681 extern int uvc_ctrl_begin(struct uvc_video_chain *chain); 682 extern int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback, 683 const struct v4l2_ext_control *xctrls, 684 unsigned int xctrls_count); 685 static inline int uvc_ctrl_commit(struct uvc_fh *handle, 686 const struct v4l2_ext_control *xctrls, 687 unsigned int xctrls_count) 688 { 689 return __uvc_ctrl_commit(handle, 0, xctrls, xctrls_count); 690 } 691 static inline int uvc_ctrl_rollback(struct uvc_fh *handle) 692 { 693 return __uvc_ctrl_commit(handle, 1, NULL, 0); 694 } 695 696 extern int uvc_ctrl_get(struct uvc_video_chain *chain, 697 struct v4l2_ext_control *xctrl); 698 extern int uvc_ctrl_set(struct uvc_video_chain *chain, 699 struct v4l2_ext_control *xctrl); 700 701 extern int uvc_xu_ctrl_query(struct uvc_video_chain *chain, 702 struct uvc_xu_control_query *xqry); 703 704 /* Utility functions */ 705 extern void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator, 706 unsigned int n_terms, unsigned int threshold); 707 extern uint32_t uvc_fraction_to_interval(uint32_t numerator, 708 uint32_t denominator); 709 extern struct usb_host_endpoint *uvc_find_endpoint( 710 struct usb_host_interface *alts, __u8 epaddr); 711 712 /* Quirks support */ 713 void uvc_video_decode_isight(struct urb *urb, struct uvc_streaming *stream, 714 struct uvc_buffer *buf); 715 716 /* debugfs and statistics */ 717 int uvc_debugfs_init(void); 718 void uvc_debugfs_cleanup(void); 719 int uvc_debugfs_init_stream(struct uvc_streaming *stream); 720 void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream); 721 722 size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf, 723 size_t size); 724 725 #endif 726