drivers/media/video/uvc/uvcvideo.h

   1 #ifndef _USB_VIDEO_H_
   2 #define _USB_VIDEO_H_
   3
   4 #include <linux/kernel.h>
   5 #include <linux/videodev2.h>
   6
   7 /*
   8  * Dynamic controls
   9  */
  10
  11 /* Data types for UVC control data */
  12 #define UVC_CTRL_DATA_TYPE_RAW          0
  13 #define UVC_CTRL_DATA_TYPE_SIGNED       1
  14 #define UVC_CTRL_DATA_TYPE_UNSIGNED     2
  15 #define UVC_CTRL_DATA_TYPE_BOOLEAN      3
  16 #define UVC_CTRL_DATA_TYPE_ENUM         4
  17 #define UVC_CTRL_DATA_TYPE_BITMASK      5
  18
  19 /* Control flags */
  20 #define UVC_CONTROL_SET_CUR     (1 << 0)
  21 #define UVC_CONTROL_GET_CUR     (1 << 1)
  22 #define UVC_CONTROL_GET_MIN     (1 << 2)
  23 #define UVC_CONTROL_GET_MAX     (1 << 3)
  24 #define UVC_CONTROL_GET_RES     (1 << 4)
  25 #define UVC_CONTROL_GET_DEF     (1 << 5)
  26 /* Control should be saved at suspend and restored at resume. */
  27 #define UVC_CONTROL_RESTORE     (1 << 6)
  28 /* Control can be updated by the camera. */
  29 #define UVC_CONTROL_AUTO_UPDATE (1 << 7)
  30
  31 #define UVC_CONTROL_GET_RANGE   (UVC_CONTROL_GET_CUR | UVC_CONTROL_GET_MIN | \
  32                                  UVC_CONTROL_GET_MAX | UVC_CONTROL_GET_RES | \
  33                                  UVC_CONTROL_GET_DEF)
  34
  35 struct uvc_xu_control_info {
  36         __u8 entity[16];
  37         __u8 index;
  38         __u8 selector;
  39         __u16 size;
  40         __u32 flags;
  41 };
  42
  43 struct uvc_xu_control_mapping {
  44         __u32 id;
  45         __u8 name[32];
  46         __u8 entity[16];
  47         __u8 selector;
  48
  49         __u8 size;
  50         __u8 offset;
  51         enum v4l2_ctrl_type v4l2_type;
  52         __u32 data_type;
  53 };
  54
  55 struct uvc_xu_control {
  56         __u8 unit;
  57         __u8 selector;
  58         __u16 size;
  59         __u8 __user *data;
  60 };
  61
  62 #define UVCIOC_CTRL_ADD         _IOW('U', 1, struct uvc_xu_control_info)
  63 #define UVCIOC_CTRL_MAP         _IOWR('U', 2, struct uvc_xu_control_mapping)
  64 #define UVCIOC_CTRL_GET         _IOWR('U', 3, struct uvc_xu_control)
  65 #define UVCIOC_CTRL_SET         _IOW('U', 4, struct uvc_xu_control)
  66
  67 #ifdef __KERNEL__
  68
  69 #include <linux/poll.h>
  70 #include <linux/usb/video.h>
  71
  72 /* --------------------------------------------------------------------------
  73  * UVC constants
  74  */
  75
  76 #define UVC_TERM_INPUT                  0x0000
  77 #define UVC_TERM_OUTPUT                 0x8000
  78
  79 #define UVC_ENTITY_TYPE(entity)         ((entity)->type & 0x7fff)
  80 #define UVC_ENTITY_IS_UNIT(entity)      (((entity)->type & 0xff00) == 0)
  81 #define UVC_ENTITY_IS_TERM(entity)      (((entity)->type & 0xff00) != 0)
  82 #define UVC_ENTITY_IS_ITERM(entity) \
  83         (UVC_ENTITY_IS_TERM(entity) && \
  84         ((entity)->type & 0x8000) == UVC_TERM_INPUT)
  85 #define UVC_ENTITY_IS_OTERM(entity) \
  86         (UVC_ENTITY_IS_TERM(entity) && \
  87         ((entity)->type & 0x8000) == UVC_TERM_OUTPUT)
  88
  89
  90 /* ------------------------------------------------------------------------
  91  * GUIDs
  92  */
  93 #define UVC_GUID_UVC_CAMERA \
  94         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  95          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}
  96 #define UVC_GUID_UVC_OUTPUT \
  97         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  98          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}
  99 #define UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT \
 100         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 101          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03}
 102 #define UVC_GUID_UVC_PROCESSING \
 103         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 104          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01}
 105 #define UVC_GUID_UVC_SELECTOR \
 106         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 107          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02}
 108
 109 #define UVC_GUID_FORMAT_MJPEG \
 110         { 'M',  'J',  'P',  'G', 0x00, 0x00, 0x10, 0x00, \
 111          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 112 #define UVC_GUID_FORMAT_YUY2 \
 113         { 'Y',  'U',  'Y',  '2', 0x00, 0x00, 0x10, 0x00, \
 114          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 115 #define UVC_GUID_FORMAT_NV12 \
 116         { 'N',  'V',  '1',  '2', 0x00, 0x00, 0x10, 0x00, \
 117          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 118 #define UVC_GUID_FORMAT_YV12 \
 119         { 'Y',  'V',  '1',  '2', 0x00, 0x00, 0x10, 0x00, \
 120          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 121 #define UVC_GUID_FORMAT_I420 \
 122         { 'I',  '4',  '2',  '0', 0x00, 0x00, 0x10, 0x00, \
 123          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 124 #define UVC_GUID_FORMAT_UYVY \
 125         { 'U',  'Y',  'V',  'Y', 0x00, 0x00, 0x10, 0x00, \
 126          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 127 #define UVC_GUID_FORMAT_Y800 \
 128         { 'Y',  '8',  '0',  '0', 0x00, 0x00, 0x10, 0x00, \
 129          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 130 #define UVC_GUID_FORMAT_BY8 \
 131         { 'B',  'Y',  '8',  ' ', 0x00, 0x00, 0x10, 0x00, \
 132          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 133
 134
 135 /* ------------------------------------------------------------------------
 136  * Driver specific constants.
 137  */
 138
 139 #define DRIVER_VERSION_NUMBER   KERNEL_VERSION(0, 1, 0)
 140
 141 /* Number of isochronous URBs. */
 142 #define UVC_URBS                5
 143 /* Maximum number of packets per URB. */
 144 #define UVC_MAX_PACKETS         32
 145 /* Maximum number of video buffers. */
 146 #define UVC_MAX_VIDEO_BUFFERS   32
 147 /* Maximum status buffer size in bytes of interrupt URB. */
 148 #define UVC_MAX_STATUS_SIZE     16
 149
 150 #define UVC_CTRL_CONTROL_TIMEOUT        300
 151 #define UVC_CTRL_STREAMING_TIMEOUT      1000
 152
 153 /* Devices quirks */
 154 #define UVC_QUIRK_STATUS_INTERVAL       0x00000001
 155 #define UVC_QUIRK_PROBE_MINMAX          0x00000002
 156 #define UVC_QUIRK_PROBE_EXTRAFIELDS     0x00000004
 157 #define UVC_QUIRK_BUILTIN_ISIGHT        0x00000008
 158 #define UVC_QUIRK_STREAM_NO_FID         0x00000010
 159 #define UVC_QUIRK_IGNORE_SELECTOR_UNIT  0x00000020
 160 #define UVC_QUIRK_FIX_BANDWIDTH         0x00000080
 161 #define UVC_QUIRK_PROBE_DEF             0x00000100
 162
 163 /* Format flags */
 164 #define UVC_FMT_FLAG_COMPRESSED         0x00000001
 165 #define UVC_FMT_FLAG_STREAM             0x00000002
 166
 167 /* ------------------------------------------------------------------------
 168  * Structures.
 169  */
 170
 171 struct uvc_device;
 172
 173 /* TODO: Put the most frequently accessed fields at the beginning of
 174  * structures to maximize cache efficiency.
 175  */
 176 struct uvc_streaming_control {
 177         __u16 bmHint;
 178         __u8  bFormatIndex;
 179         __u8  bFrameIndex;
 180         __u32 dwFrameInterval;
 181         __u16 wKeyFrameRate;
 182         __u16 wPFrameRate;
 183         __u16 wCompQuality;
 184         __u16 wCompWindowSize;
 185         __u16 wDelay;
 186         __u32 dwMaxVideoFrameSize;
 187         __u32 dwMaxPayloadTransferSize;
 188         __u32 dwClockFrequency;
 189         __u8  bmFramingInfo;
 190         __u8  bPreferedVersion;
 191         __u8  bMinVersion;
 192         __u8  bMaxVersion;
 193 };
 194
 195 struct uvc_menu_info {
 196         __u32 value;
 197         __u8 name[32];
 198 };
 199
 200 struct uvc_control_info {
 201         struct list_head list;
 202         struct list_head mappings;
 203
 204         __u8 entity[16];
 205         __u8 index;
 206         __u8 selector;
 207
 208         __u16 size;
 209         __u32 flags;
 210 };
 211
 212 struct uvc_control_mapping {
 213         struct list_head list;
 214
 215         struct uvc_control_info *ctrl;
 216
 217         __u32 id;
 218         __u8 name[32];
 219         __u8 entity[16];
 220         __u8 selector;
 221
 222         __u8 size;
 223         __u8 offset;
 224         enum v4l2_ctrl_type v4l2_type;
 225         __u32 data_type;
 226
 227         struct uvc_menu_info *menu_info;
 228         __u32 menu_count;
 229
 230         __s32 (*get) (struct uvc_control_mapping *mapping, __u8 query,
 231                       const __u8 *data);
 232         void (*set) (struct uvc_control_mapping *mapping, __s32 value,
 233                      __u8 *data);
 234 };
 235
 236 struct uvc_control {
 237         struct uvc_entity *entity;
 238         struct uvc_control_info *info;
 239
 240         __u8 index;     /* Used to match the uvc_control entry with a
 241                            uvc_control_info. */
 242         __u8 dirty : 1,
 243              loaded : 1,
 244              modified : 1;
 245
 246         __u8 *data;
 247 };
 248
 249 struct uvc_format_desc {
 250         char *name;
 251         __u8 guid[16];
 252         __u32 fcc;
 253 };
 254
 255 /* The term 'entity' refers to both UVC units and UVC terminals.
 256  *
 257  * The type field is either the terminal type (wTerminalType in the terminal
 258  * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor).
 259  * As the bDescriptorSubtype field is one byte long, the type value will
 260  * always have a null MSB for units. All terminal types defined by the UVC
 261  * specification have a non-null MSB, so it is safe to use the MSB to
 262  * differentiate between units and terminals as long as the descriptor parsing
 263  * code makes sure terminal types have a non-null MSB.
 264  *
 265  * For terminals, the type's most significant bit stores the terminal
 266  * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should
 267  * always be accessed with the UVC_ENTITY_* macros and never directly.
 268  */
 269
 270 struct uvc_entity {
 271         struct list_head list;          /* Entity as part of a UVC device. */
 272         struct list_head chain;         /* Entity as part of a video device
 273                                          * chain. */
 274         __u8 id;
 275         __u16 type;
 276         char name[64];
 277
 278         union {
 279                 struct {
 280                         __u16 wObjectiveFocalLengthMin;
 281                         __u16 wObjectiveFocalLengthMax;
 282                         __u16 wOcularFocalLength;
 283                         __u8  bControlSize;
 284                         __u8  *bmControls;
 285                 } camera;
 286
 287                 struct {
 288                         __u8  bControlSize;
 289                         __u8  *bmControls;
 290                         __u8  bTransportModeSize;
 291                         __u8  *bmTransportModes;
 292                 } media;
 293
 294                 struct {
 295                         __u8  bSourceID;
 296                 } output;
 297
 298                 struct {
 299                         __u8  bSourceID;
 300                         __u16 wMaxMultiplier;
 301                         __u8  bControlSize;
 302                         __u8  *bmControls;
 303                         __u8  bmVideoStandards;
 304                 } processing;
 305
 306                 struct {
 307                         __u8  bNrInPins;
 308                         __u8  *baSourceID;
 309                 } selector;
 310
 311                 struct {
 312                         __u8  guidExtensionCode[16];
 313                         __u8  bNumControls;
 314                         __u8  bNrInPins;
 315                         __u8  *baSourceID;
 316                         __u8  bControlSize;
 317                         __u8  *bmControls;
 318                         __u8  *bmControlsType;
 319                 } extension;
 320         };
 321
 322         unsigned int ncontrols;
 323         struct uvc_control *controls;
 324 };
 325
 326 struct uvc_frame {
 327         __u8  bFrameIndex;
 328         __u8  bmCapabilities;
 329         __u16 wWidth;
 330         __u16 wHeight;
 331         __u32 dwMinBitRate;
 332         __u32 dwMaxBitRate;
 333         __u32 dwMaxVideoFrameBufferSize;
 334         __u8  bFrameIntervalType;
 335         __u32 dwDefaultFrameInterval;
 336         __u32 *dwFrameInterval;
 337 };
 338
 339 struct uvc_format {
 340         __u8 type;
 341         __u8 index;
 342         __u8 bpp;
 343         __u8 colorspace;
 344         __u32 fcc;
 345         __u32 flags;
 346
 347         char name[32];
 348
 349         unsigned int nframes;
 350         struct uvc_frame *frame;
 351 };
 352
 353 struct uvc_streaming_header {
 354         __u8 bNumFormats;
 355         __u8 bEndpointAddress;
 356         __u8 bTerminalLink;
 357         __u8 bControlSize;
 358         __u8 *bmaControls;
 359         /* The following fields are used by input headers only. */
 360         __u8 bmInfo;
 361         __u8 bStillCaptureMethod;
 362         __u8 bTriggerSupport;
 363         __u8 bTriggerUsage;
 364 };
 365
 366 enum uvc_buffer_state {
 367         UVC_BUF_STATE_IDLE      = 0,
 368         UVC_BUF_STATE_QUEUED    = 1,
 369         UVC_BUF_STATE_ACTIVE    = 2,
 370         UVC_BUF_STATE_DONE      = 3,
 371         UVC_BUF_STATE_ERROR     = 4,
 372 };
 373
 374 struct uvc_buffer {
 375         unsigned long vma_use_count;
 376         struct list_head stream;
 377
 378         /* Touched by interrupt handler. */
 379         struct v4l2_buffer buf;
 380         struct list_head queue;
 381         wait_queue_head_t wait;
 382         enum uvc_buffer_state state;
 383 };
 384
 385 #define UVC_QUEUE_STREAMING             (1 << 0)
 386 #define UVC_QUEUE_DISCONNECTED          (1 << 1)
 387 #define UVC_QUEUE_DROP_INCOMPLETE       (1 << 2)
 388
 389 struct uvc_video_queue {
 390         enum v4l2_buf_type type;
 391
 392         void *mem;
 393         unsigned int flags;
 394         __u32 sequence;
 395
 396         unsigned int count;
 397         unsigned int buf_size;
 398         unsigned int buf_used;
 399         struct uvc_buffer buffer[UVC_MAX_VIDEO_BUFFERS];
 400         struct mutex mutex;     /* protects buffers and mainqueue */
 401         spinlock_t irqlock;     /* protects irqqueue */
 402
 403         struct list_head mainqueue;
 404         struct list_head irqqueue;
 405 };
 406
 407 struct uvc_video_chain {
 408         struct uvc_device *dev;
 409         struct list_head list;
 410
 411         struct list_head iterms;                /* Input terminals */
 412         struct list_head oterms;                /* Output terminals */
 413         struct uvc_entity *processing;          /* Processing unit */
 414         struct uvc_entity *selector;            /* Selector unit */
 415         struct list_head extensions;            /* Extension units */
 416
 417         struct mutex ctrl_mutex;
 418 };
 419
 420 struct uvc_streaming {
 421         struct list_head list;
 422         struct uvc_device *dev;
 423         struct video_device *vdev;
 424         struct uvc_video_chain *chain;
 425         atomic_t active;
 426
 427         struct usb_interface *intf;
 428         int intfnum;
 429         __u16 maxpsize;
 430
 431         struct uvc_streaming_header header;
 432         enum v4l2_buf_type type;
 433
 434         unsigned int nformats;
 435         struct uvc_format *format;
 436
 437         struct uvc_streaming_control ctrl;
 438         struct uvc_format *cur_format;
 439         struct uvc_frame *cur_frame;
 440
 441         struct mutex mutex;
 442
 443         unsigned int frozen : 1;
 444         struct uvc_video_queue queue;
 445         void (*decode) (struct urb *urb, struct uvc_streaming *video,
 446                         struct uvc_buffer *buf);
 447
 448         /* Context data used by the bulk completion handler. */
 449         struct {
 450                 __u8 header[256];
 451                 unsigned int header_size;
 452                 int skip_payload;
 453                 __u32 payload_size;
 454                 __u32 max_payload_size;
 455         } bulk;
 456
 457         struct urb *urb[UVC_URBS];
 458         char *urb_buffer[UVC_URBS];
 459         dma_addr_t urb_dma[UVC_URBS];
 460         unsigned int urb_size;
 461
 462         __u8 last_fid;
 463 };
 464
 465 enum uvc_device_state {
 466         UVC_DEV_DISCONNECTED = 1,
 467 };
 468
 469 struct uvc_device {
 470         struct usb_device *udev;
 471         struct usb_interface *intf;
 472         unsigned long warnings;
 473         __u32 quirks;
 474         int intfnum;
 475         char name[32];
 476
 477         enum uvc_device_state state;
 478         struct kref kref;
 479         struct list_head list;
 480         atomic_t users;
 481
 482         /* Video control interface */
 483         __u16 uvc_version;
 484         __u32 clock_frequency;
 485
 486         struct list_head entities;
 487         struct list_head chains;
 488
 489         /* Video Streaming interfaces */
 490         struct list_head streams;
 491
 492         /* Status Interrupt Endpoint */
 493         struct usb_host_endpoint *int_ep;
 494         struct urb *int_urb;
 495         __u8 *status;
 496         struct input_dev *input;
 497         char input_phys[64];
 498 };
 499
 500 enum uvc_handle_state {
 501         UVC_HANDLE_PASSIVE      = 0,
 502         UVC_HANDLE_ACTIVE       = 1,
 503 };
 504
 505 struct uvc_fh {
 506         struct uvc_video_chain *chain;
 507         struct uvc_streaming *stream;
 508         enum uvc_handle_state state;
 509 };
 510
 511 struct uvc_driver {
 512         struct usb_driver driver;
 513
 514         struct mutex open_mutex;        /* protects from open/disconnect race */
 515
 516         struct list_head devices;       /* struct uvc_device list */
 517         struct list_head controls;      /* struct uvc_control_info list */
 518         struct mutex ctrl_mutex;        /* protects controls and devices
 519                                            lists */
 520 };
 521
 522 /* ------------------------------------------------------------------------
 523  * Debugging, printing and logging
 524  */
 525
 526 #define UVC_TRACE_PROBE         (1 << 0)
 527 #define UVC_TRACE_DESCR         (1 << 1)
 528 #define UVC_TRACE_CONTROL       (1 << 2)
 529 #define UVC_TRACE_FORMAT        (1 << 3)
 530 #define UVC_TRACE_CAPTURE       (1 << 4)
 531 #define UVC_TRACE_CALLS         (1 << 5)
 532 #define UVC_TRACE_IOCTL         (1 << 6)
 533 #define UVC_TRACE_FRAME         (1 << 7)
 534 #define UVC_TRACE_SUSPEND       (1 << 8)
 535 #define UVC_TRACE_STATUS        (1 << 9)
 536
 537 #define UVC_WARN_MINMAX         0
 538 #define UVC_WARN_PROBE_DEF      1
 539
 540 extern unsigned int uvc_no_drop_param;
 541 extern unsigned int uvc_trace_param;
 542
 543 #define uvc_trace(flag, msg...) \
 544         do { \
 545                 if (uvc_trace_param & flag) \
 546                         printk(KERN_DEBUG "uvcvideo: " msg); \
 547         } while (0)
 548
 549 #define uvc_warn_once(dev, warn, msg...) \
 550         do { \
 551                 if (!test_and_set_bit(warn, &dev->warnings)) \
 552                         printk(KERN_INFO "uvcvideo: " msg); \
 553         } while (0)
 554
 555 #define uvc_printk(level, msg...) \
 556         printk(level "uvcvideo: " msg)
 557
 558 #define UVC_GUID_FORMAT "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-" \
 559                         "%02x%02x%02x%02x%02x%02x"
 560 #define UVC_GUID_ARGS(guid) \
 561         (guid)[3],  (guid)[2],  (guid)[1],  (guid)[0], \
 562         (guid)[5],  (guid)[4], \
 563         (guid)[7],  (guid)[6], \
 564         (guid)[8],  (guid)[9], \
 565         (guid)[10], (guid)[11], (guid)[12], \
 566         (guid)[13], (guid)[14], (guid)[15]
 567
 568 /* --------------------------------------------------------------------------
 569  * Internal functions.
 570  */
 571
 572 /* Core driver */
 573 extern struct uvc_driver uvc_driver;
 574 extern void uvc_delete(struct kref *kref);
 575
 576 /* Video buffers queue management. */
 577 extern void uvc_queue_init(struct uvc_video_queue *queue,
 578                 enum v4l2_buf_type type);
 579 extern int uvc_alloc_buffers(struct uvc_video_queue *queue,
 580                 unsigned int nbuffers, unsigned int buflength);
 581 extern int uvc_free_buffers(struct uvc_video_queue *queue);
 582 extern int uvc_query_buffer(struct uvc_video_queue *queue,
 583                 struct v4l2_buffer *v4l2_buf);
 584 extern int uvc_queue_buffer(struct uvc_video_queue *queue,
 585                 struct v4l2_buffer *v4l2_buf);
 586 extern int uvc_dequeue_buffer(struct uvc_video_queue *queue,
 587                 struct v4l2_buffer *v4l2_buf, int nonblocking);
 588 extern int uvc_queue_enable(struct uvc_video_queue *queue, int enable);
 589 extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
 590 extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
 591                 struct uvc_buffer *buf);
 592 extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue,
 593                 struct file *file, poll_table *wait);
 594 extern int uvc_queue_allocated(struct uvc_video_queue *queue);
 595 static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
 596 {
 597         return queue->flags & UVC_QUEUE_STREAMING;
 598 }
 599
 600 /* V4L2 interface */
 601 extern const struct v4l2_file_operations uvc_fops;
 602
 603 /* Video */
 604 extern int uvc_video_init(struct uvc_streaming *stream);
 605 extern int uvc_video_suspend(struct uvc_streaming *stream);
 606 extern int uvc_video_resume(struct uvc_streaming *stream);
 607 extern int uvc_video_enable(struct uvc_streaming *stream, int enable);
 608 extern int uvc_probe_video(struct uvc_streaming *stream,
 609                 struct uvc_streaming_control *probe);
 610 extern int uvc_commit_video(struct uvc_streaming *stream,
 611                 struct uvc_streaming_control *ctrl);
 612 extern int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit,
 613                 __u8 intfnum, __u8 cs, void *data, __u16 size);
 614
 615 /* Status */
 616 extern int uvc_status_init(struct uvc_device *dev);
 617 extern void uvc_status_cleanup(struct uvc_device *dev);
 618 extern int uvc_status_start(struct uvc_device *dev);
 619 extern void uvc_status_stop(struct uvc_device *dev);
 620 extern int uvc_status_suspend(struct uvc_device *dev);
 621 extern int uvc_status_resume(struct uvc_device *dev);
 622
 623 /* Controls */
 624 extern struct uvc_control *uvc_find_control(struct uvc_video_chain *chain,
 625                 __u32 v4l2_id, struct uvc_control_mapping **mapping);
 626 extern int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
 627                 struct v4l2_queryctrl *v4l2_ctrl);
 628
 629 extern int uvc_ctrl_add_info(struct uvc_control_info *info);
 630 extern int uvc_ctrl_add_mapping(struct uvc_control_mapping *mapping);
 631 extern int uvc_ctrl_init_device(struct uvc_device *dev);
 632 extern void uvc_ctrl_cleanup_device(struct uvc_device *dev);
 633 extern int uvc_ctrl_resume_device(struct uvc_device *dev);
 634 extern void uvc_ctrl_init(void);
 635
 636 extern int uvc_ctrl_begin(struct uvc_video_chain *chain);
 637 extern int __uvc_ctrl_commit(struct uvc_video_chain *chain, int rollback);
 638 static inline int uvc_ctrl_commit(struct uvc_video_chain *chain)
 639 {
 640         return __uvc_ctrl_commit(chain, 0);
 641 }
 642 static inline int uvc_ctrl_rollback(struct uvc_video_chain *chain)
 643 {
 644         return __uvc_ctrl_commit(chain, 1);
 645 }
 646
 647 extern int uvc_ctrl_get(struct uvc_video_chain *chain,
 648                 struct v4l2_ext_control *xctrl);
 649 extern int uvc_ctrl_set(struct uvc_video_chain *chain,
 650                 struct v4l2_ext_control *xctrl);
 651
 652 extern int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
 653                 struct uvc_xu_control *ctrl, int set);
 654
 655 /* Utility functions */
 656 extern void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
 657                 unsigned int n_terms, unsigned int threshold);
 658 extern uint32_t uvc_fraction_to_interval(uint32_t numerator,
 659                 uint32_t denominator);
 660 extern struct usb_host_endpoint *uvc_find_endpoint(
 661                 struct usb_host_interface *alts, __u8 epaddr);
 662
 663 /* Quirks support */
 664 void uvc_video_decode_isight(struct urb *urb, struct uvc_streaming *stream,
 665                 struct uvc_buffer *buf);
 666
 667 #endif /* __KERNEL__ */
 668
 669 #endif
 670