drivers/media/video/uvc/uvcvideo.h

   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 void 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