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 struct uvc_entity { 229 struct list_head list; /* Entity as part of a UVC device. */ 230 struct list_head chain; /* Entity as part of a video device 231 * chain. */ 232 __u8 id; 233 __u16 type; 234 char name[64]; 235 236 /* Media controller-related fields. */ 237 struct video_device *vdev; 238 struct v4l2_subdev subdev; 239 unsigned int num_pads; 240 unsigned int num_links; 241 struct media_pad *pads; 242 243 union { 244 struct { 245 __u16 wObjectiveFocalLengthMin; 246 __u16 wObjectiveFocalLengthMax; 247 __u16 wOcularFocalLength; 248 __u8 bControlSize; 249 __u8 *bmControls; 250 } camera; 251 252 struct { 253 __u8 bControlSize; 254 __u8 *bmControls; 255 __u8 bTransportModeSize; 256 __u8 *bmTransportModes; 257 } media; 258 259 struct { 260 } output; 261 262 struct { 263 __u16 wMaxMultiplier; 264 __u8 bControlSize; 265 __u8 *bmControls; 266 __u8 bmVideoStandards; 267 } processing; 268 269 struct { 270 } selector; 271 272 struct { 273 __u8 guidExtensionCode[16]; 274 __u8 bNumControls; 275 __u8 bControlSize; 276 __u8 *bmControls; 277 __u8 *bmControlsType; 278 } extension; 279 }; 280 281 __u8 bNrInPins; 282 __u8 *baSourceID; 283 284 unsigned int ncontrols; 285 struct uvc_control *controls; 286 }; 287 288 struct uvc_frame { 289 __u8 bFrameIndex; 290 __u8 bmCapabilities; 291 __u16 wWidth; 292 __u16 wHeight; 293 __u32 dwMinBitRate; 294 __u32 dwMaxBitRate; 295 __u32 dwMaxVideoFrameBufferSize; 296 __u8 bFrameIntervalType; 297 __u32 dwDefaultFrameInterval; 298 __u32 *dwFrameInterval; 299 }; 300 301 struct uvc_format { 302 __u8 type; 303 __u8 index; 304 __u8 bpp; 305 __u8 colorspace; 306 __u32 fcc; 307 __u32 flags; 308 309 char name[32]; 310 311 unsigned int nframes; 312 struct uvc_frame *frame; 313 }; 314 315 struct uvc_streaming_header { 316 __u8 bNumFormats; 317 __u8 bEndpointAddress; 318 __u8 bTerminalLink; 319 __u8 bControlSize; 320 __u8 *bmaControls; 321 /* The following fields are used by input headers only. */ 322 __u8 bmInfo; 323 __u8 bStillCaptureMethod; 324 __u8 bTriggerSupport; 325 __u8 bTriggerUsage; 326 }; 327 328 enum uvc_buffer_state { 329 UVC_BUF_STATE_IDLE = 0, 330 UVC_BUF_STATE_QUEUED = 1, 331 UVC_BUF_STATE_ACTIVE = 2, 332 UVC_BUF_STATE_READY = 3, 333 UVC_BUF_STATE_DONE = 4, 334 UVC_BUF_STATE_ERROR = 5, 335 }; 336 337 struct uvc_buffer { 338 struct vb2_buffer buf; 339 struct list_head queue; 340 341 enum uvc_buffer_state state; 342 unsigned int error; 343 344 void *mem; 345 unsigned int length; 346 unsigned int bytesused; 347 348 u32 pts; 349 }; 350 351 #define UVC_QUEUE_DISCONNECTED (1 << 0) 352 #define UVC_QUEUE_DROP_CORRUPTED (1 << 1) 353 354 struct uvc_video_queue { 355 struct vb2_queue queue; 356 struct mutex mutex; /* Protects queue */ 357 358 unsigned int flags; 359 unsigned int buf_used; 360 361 spinlock_t irqlock; /* Protects irqqueue */ 362 struct list_head irqqueue; 363 }; 364 365 struct uvc_video_chain { 366 struct uvc_device *dev; 367 struct list_head list; 368 369 struct list_head entities; /* All entities */ 370 struct uvc_entity *processing; /* Processing unit */ 371 struct uvc_entity *selector; /* Selector unit */ 372 373 struct mutex ctrl_mutex; /* Protects ctrl.info */ 374 }; 375 376 struct uvc_stats_frame { 377 unsigned int size; /* Number of bytes captured */ 378 unsigned int first_data; /* Index of the first non-empty packet */ 379 380 unsigned int nb_packets; /* Number of packets */ 381 unsigned int nb_empty; /* Number of empty packets */ 382 unsigned int nb_invalid; /* Number of packets with an invalid header */ 383 unsigned int nb_errors; /* Number of packets with the error bit set */ 384 385 unsigned int nb_pts; /* Number of packets with a PTS timestamp */ 386 unsigned int nb_pts_diffs; /* Number of PTS differences inside a frame */ 387 unsigned int last_pts_diff; /* Index of the last PTS difference */ 388 bool has_initial_pts; /* Whether the first non-empty packet has a PTS */ 389 bool has_early_pts; /* Whether a PTS is present before the first non-empty packet */ 390 u32 pts; /* PTS of the last packet */ 391 392 unsigned int nb_scr; /* Number of packets with a SCR timestamp */ 393 unsigned int nb_scr_diffs; /* Number of SCR.STC differences inside a frame */ 394 u16 scr_sof; /* SCR.SOF of the last packet */ 395 u32 scr_stc; /* SCR.STC of the last packet */ 396 }; 397 398 struct uvc_stats_stream { 399 struct timespec start_ts; /* Stream start timestamp */ 400 struct timespec stop_ts; /* Stream stop timestamp */ 401 402 unsigned int nb_frames; /* Number of frames */ 403 404 unsigned int nb_packets; /* Number of packets */ 405 unsigned int nb_empty; /* Number of empty packets */ 406 unsigned int nb_invalid; /* Number of packets with an invalid header */ 407 unsigned int nb_errors; /* Number of packets with the error bit set */ 408 409 unsigned int nb_pts_constant; /* Number of frames with constant PTS */ 410 unsigned int nb_pts_early; /* Number of frames with early PTS */ 411 unsigned int nb_pts_initial; /* Number of frames with initial PTS */ 412 413 unsigned int nb_scr_count_ok; /* Number of frames with at least one SCR per non empty packet */ 414 unsigned int nb_scr_diffs_ok; /* Number of frames with varying SCR.STC */ 415 unsigned int scr_sof_count; /* STC.SOF counter accumulated since stream start */ 416 unsigned int scr_sof; /* STC.SOF of the last packet */ 417 unsigned int min_sof; /* Minimum STC.SOF value */ 418 unsigned int max_sof; /* Maximum STC.SOF value */ 419 }; 420 421 struct uvc_streaming { 422 struct list_head list; 423 struct uvc_device *dev; 424 struct video_device *vdev; 425 struct uvc_video_chain *chain; 426 atomic_t active; 427 428 struct usb_interface *intf; 429 int intfnum; 430 __u16 maxpsize; 431 432 struct uvc_streaming_header header; 433 enum v4l2_buf_type type; 434 435 unsigned int nformats; 436 struct uvc_format *format; 437 438 struct uvc_streaming_control ctrl; 439 struct uvc_format *cur_format; 440 struct uvc_frame *cur_frame; 441 /* Protect access to ctrl, cur_format, cur_frame and hardware video 442 * probe control. 443 */ 444 struct mutex mutex; 445 446 /* Buffers queue. */ 447 unsigned int frozen : 1; 448 struct uvc_video_queue queue; 449 void (*decode) (struct urb *urb, struct uvc_streaming *video, 450 struct uvc_buffer *buf); 451 452 /* Context data used by the bulk completion handler. */ 453 struct { 454 __u8 header[256]; 455 unsigned int header_size; 456 int skip_payload; 457 __u32 payload_size; 458 __u32 max_payload_size; 459 } bulk; 460 461 struct urb *urb[UVC_URBS]; 462 char *urb_buffer[UVC_URBS]; 463 dma_addr_t urb_dma[UVC_URBS]; 464 unsigned int urb_size; 465 466 __u32 sequence; 467 __u8 last_fid; 468 469 /* debugfs */ 470 struct dentry *debugfs_dir; 471 struct { 472 struct uvc_stats_frame frame; 473 struct uvc_stats_stream stream; 474 } stats; 475 476 /* Timestamps support. */ 477 struct uvc_clock { 478 struct uvc_clock_sample { 479 u32 dev_stc; 480 u16 dev_sof; 481 struct timespec host_ts; 482 u16 host_sof; 483 } *samples; 484 485 unsigned int head; 486 unsigned int count; 487 unsigned int size; 488 489 u16 last_sof; 490 u16 sof_offset; 491 492 spinlock_t lock; 493 } clock; 494 }; 495 496 enum uvc_device_state { 497 UVC_DEV_DISCONNECTED = 1, 498 }; 499 500 struct uvc_device { 501 struct usb_device *udev; 502 struct usb_interface *intf; 503 unsigned long warnings; 504 __u32 quirks; 505 int intfnum; 506 char name[32]; 507 508 enum uvc_device_state state; 509 atomic_t users; 510 atomic_t nmappings; 511 512 /* Video control interface */ 513 #ifdef CONFIG_MEDIA_CONTROLLER 514 struct media_device mdev; 515 #endif 516 struct v4l2_device vdev; 517 __u16 uvc_version; 518 __u32 clock_frequency; 519 520 struct list_head entities; 521 struct list_head chains; 522 523 /* Video Streaming interfaces */ 524 struct list_head streams; 525 atomic_t nstreams; 526 527 /* Status Interrupt Endpoint */ 528 struct usb_host_endpoint *int_ep; 529 struct urb *int_urb; 530 __u8 *status; 531 struct input_dev *input; 532 char input_phys[64]; 533 }; 534 535 enum uvc_handle_state { 536 UVC_HANDLE_PASSIVE = 0, 537 UVC_HANDLE_ACTIVE = 1, 538 }; 539 540 struct uvc_fh { 541 struct v4l2_fh vfh; 542 struct uvc_video_chain *chain; 543 struct uvc_streaming *stream; 544 enum uvc_handle_state state; 545 }; 546 547 struct uvc_driver { 548 struct usb_driver driver; 549 }; 550 551 /* ------------------------------------------------------------------------ 552 * Debugging, printing and logging 553 */ 554 555 #define UVC_TRACE_PROBE (1 << 0) 556 #define UVC_TRACE_DESCR (1 << 1) 557 #define UVC_TRACE_CONTROL (1 << 2) 558 #define UVC_TRACE_FORMAT (1 << 3) 559 #define UVC_TRACE_CAPTURE (1 << 4) 560 #define UVC_TRACE_CALLS (1 << 5) 561 #define UVC_TRACE_IOCTL (1 << 6) 562 #define UVC_TRACE_FRAME (1 << 7) 563 #define UVC_TRACE_SUSPEND (1 << 8) 564 #define UVC_TRACE_STATUS (1 << 9) 565 #define UVC_TRACE_VIDEO (1 << 10) 566 #define UVC_TRACE_STATS (1 << 11) 567 #define UVC_TRACE_CLOCK (1 << 12) 568 569 #define UVC_WARN_MINMAX 0 570 #define UVC_WARN_PROBE_DEF 1 571 #define UVC_WARN_XU_GET_RES 2 572 573 extern unsigned int uvc_clock_param; 574 extern unsigned int uvc_no_drop_param; 575 extern unsigned int uvc_trace_param; 576 extern unsigned int uvc_timeout_param; 577 578 #define uvc_trace(flag, msg...) \ 579 do { \ 580 if (uvc_trace_param & flag) \ 581 printk(KERN_DEBUG "uvcvideo: " msg); \ 582 } while (0) 583 584 #define uvc_warn_once(dev, warn, msg...) \ 585 do { \ 586 if (!test_and_set_bit(warn, &dev->warnings)) \ 587 printk(KERN_INFO "uvcvideo: " msg); \ 588 } while (0) 589 590 #define uvc_printk(level, msg...) \ 591 printk(level "uvcvideo: " msg) 592 593 /* -------------------------------------------------------------------------- 594 * Internal functions. 595 */ 596 597 /* Core driver */ 598 extern struct uvc_driver uvc_driver; 599 600 extern struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id); 601 602 /* Video buffers queue management. */ 603 extern int uvc_queue_init(struct uvc_video_queue *queue, 604 enum v4l2_buf_type type, int drop_corrupted); 605 extern int uvc_alloc_buffers(struct uvc_video_queue *queue, 606 struct v4l2_requestbuffers *rb); 607 extern void uvc_free_buffers(struct uvc_video_queue *queue); 608 extern int uvc_query_buffer(struct uvc_video_queue *queue, 609 struct v4l2_buffer *v4l2_buf); 610 extern int uvc_queue_buffer(struct uvc_video_queue *queue, 611 struct v4l2_buffer *v4l2_buf); 612 extern int uvc_dequeue_buffer(struct uvc_video_queue *queue, 613 struct v4l2_buffer *v4l2_buf, int nonblocking); 614 extern int uvc_queue_enable(struct uvc_video_queue *queue, int enable); 615 extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect); 616 extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue, 617 struct uvc_buffer *buf); 618 extern int uvc_queue_mmap(struct uvc_video_queue *queue, 619 struct vm_area_struct *vma); 620 extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue, 621 struct file *file, poll_table *wait); 622 #ifndef CONFIG_MMU 623 extern unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue, 624 unsigned long pgoff); 625 #endif 626 extern int uvc_queue_allocated(struct uvc_video_queue *queue); 627 static inline int uvc_queue_streaming(struct uvc_video_queue *queue) 628 { 629 return vb2_is_streaming(&queue->queue); 630 } 631 632 /* V4L2 interface */ 633 extern const struct v4l2_file_operations uvc_fops; 634 635 /* Media controller */ 636 extern int uvc_mc_register_entities(struct uvc_video_chain *chain); 637 extern void uvc_mc_cleanup_entity(struct uvc_entity *entity); 638 639 /* Video */ 640 extern int uvc_video_init(struct uvc_streaming *stream); 641 extern int uvc_video_suspend(struct uvc_streaming *stream); 642 extern int uvc_video_resume(struct uvc_streaming *stream, int reset); 643 extern int uvc_video_enable(struct uvc_streaming *stream, int enable); 644 extern int uvc_probe_video(struct uvc_streaming *stream, 645 struct uvc_streaming_control *probe); 646 extern int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit, 647 __u8 intfnum, __u8 cs, void *data, __u16 size); 648 void uvc_video_clock_update(struct uvc_streaming *stream, 649 struct v4l2_buffer *v4l2_buf, 650 struct uvc_buffer *buf); 651 652 /* Status */ 653 extern int uvc_status_init(struct uvc_device *dev); 654 extern void uvc_status_cleanup(struct uvc_device *dev); 655 extern int uvc_status_start(struct uvc_device *dev); 656 extern void uvc_status_stop(struct uvc_device *dev); 657 extern int uvc_status_suspend(struct uvc_device *dev); 658 extern int uvc_status_resume(struct uvc_device *dev); 659 660 /* Controls */ 661 extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops; 662 663 extern int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, 664 struct v4l2_queryctrl *v4l2_ctrl); 665 extern int uvc_query_v4l2_menu(struct uvc_video_chain *chain, 666 struct v4l2_querymenu *query_menu); 667 668 extern int uvc_ctrl_add_mapping(struct uvc_video_chain *chain, 669 const struct uvc_control_mapping *mapping); 670 extern int uvc_ctrl_init_device(struct uvc_device *dev); 671 extern void uvc_ctrl_cleanup_device(struct uvc_device *dev); 672 extern int uvc_ctrl_resume_device(struct uvc_device *dev); 673 674 extern int uvc_ctrl_begin(struct uvc_video_chain *chain); 675 extern int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback, 676 const struct v4l2_ext_control *xctrls, 677 unsigned int xctrls_count); 678 static inline int uvc_ctrl_commit(struct uvc_fh *handle, 679 const struct v4l2_ext_control *xctrls, 680 unsigned int xctrls_count) 681 { 682 return __uvc_ctrl_commit(handle, 0, xctrls, xctrls_count); 683 } 684 static inline int uvc_ctrl_rollback(struct uvc_fh *handle) 685 { 686 return __uvc_ctrl_commit(handle, 1, NULL, 0); 687 } 688 689 extern int uvc_ctrl_get(struct uvc_video_chain *chain, 690 struct v4l2_ext_control *xctrl); 691 extern int uvc_ctrl_set(struct uvc_video_chain *chain, 692 struct v4l2_ext_control *xctrl); 693 694 extern int uvc_xu_ctrl_query(struct uvc_video_chain *chain, 695 struct uvc_xu_control_query *xqry); 696 697 /* Utility functions */ 698 extern void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator, 699 unsigned int n_terms, unsigned int threshold); 700 extern uint32_t uvc_fraction_to_interval(uint32_t numerator, 701 uint32_t denominator); 702 extern struct usb_host_endpoint *uvc_find_endpoint( 703 struct usb_host_interface *alts, __u8 epaddr); 704 705 /* Quirks support */ 706 void uvc_video_decode_isight(struct urb *urb, struct uvc_streaming *stream, 707 struct uvc_buffer *buf); 708 709 /* debugfs and statistics */ 710 int uvc_debugfs_init(void); 711 void uvc_debugfs_cleanup(void); 712 int uvc_debugfs_init_stream(struct uvc_streaming *stream); 713 void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream); 714 715 size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf, 716 size_t size); 717 718 #endif 719