drivers/media/usb/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-v4l2.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_BA81 \
  98         { 'B',  'A',  '8',  '1', 0x00, 0x00, 0x10, 0x00, \
  99          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 100 #define UVC_GUID_FORMAT_GBRG \
 101         { 'G',  'B',  'R',  'G', 0x00, 0x00, 0x10, 0x00, \
 102          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 103 #define UVC_GUID_FORMAT_GRBG \
 104         { 'G',  'R',  'B',  'G', 0x00, 0x00, 0x10, 0x00, \
 105          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 106 #define UVC_GUID_FORMAT_RGGB \
 107         { 'R',  'G',  'G',  'B', 0x00, 0x00, 0x10, 0x00, \
 108          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 109 #define UVC_GUID_FORMAT_RGBP \
 110         { 'R',  'G',  'B',  'P', 0x00, 0x00, 0x10, 0x00, \
 111          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 112 #define UVC_GUID_FORMAT_BGR3 \
 113         { 0x7d, 0xeb, 0x36, 0xe4, 0x4f, 0x52, 0xce, 0x11, \
 114          0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}
 115 #define UVC_GUID_FORMAT_M420 \
 116         { 'M',  '4',  '2',  '0', 0x00, 0x00, 0x10, 0x00, \
 117          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 118
 119 #define UVC_GUID_FORMAT_H264 \
 120         { 'H',  '2',  '6',  '4', 0x00, 0x00, 0x10, 0x00, \
 121          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 122
 123 /* ------------------------------------------------------------------------
 124  * Driver specific constants.
 125  */
 126
 127 #define DRIVER_VERSION          "1.1.1"
 128
 129 /* Number of isochronous URBs. */
 130 #define UVC_URBS                5
 131 /* Maximum number of packets per URB. */
 132 #define UVC_MAX_PACKETS         32
 133 /* Maximum status buffer size in bytes of interrupt URB. */
 134 #define UVC_MAX_STATUS_SIZE     16
 135
 136 #define UVC_CTRL_CONTROL_TIMEOUT        300
 137 #define UVC_CTRL_STREAMING_TIMEOUT      5000
 138
 139 /* Maximum allowed number of control mappings per device */
 140 #define UVC_MAX_CONTROL_MAPPINGS        1024
 141 #define UVC_MAX_CONTROL_MENU_ENTRIES    32
 142
 143 /* Devices quirks */
 144 #define UVC_QUIRK_STATUS_INTERVAL       0x00000001
 145 #define UVC_QUIRK_PROBE_MINMAX          0x00000002
 146 #define UVC_QUIRK_PROBE_EXTRAFIELDS     0x00000004
 147 #define UVC_QUIRK_BUILTIN_ISIGHT        0x00000008
 148 #define UVC_QUIRK_STREAM_NO_FID         0x00000010
 149 #define UVC_QUIRK_IGNORE_SELECTOR_UNIT  0x00000020
 150 #define UVC_QUIRK_FIX_BANDWIDTH         0x00000080
 151 #define UVC_QUIRK_PROBE_DEF             0x00000100
 152 #define UVC_QUIRK_RESTRICT_FRAME_RATE   0x00000200
 153 #define UVC_QUIRK_RESTORE_CTRLS_ON_INIT 0x00000400
 154 #define UVC_QUIRK_FORCE_Y8              0x00000800
 155
 156 /* Format flags */
 157 #define UVC_FMT_FLAG_COMPRESSED         0x00000001
 158 #define UVC_FMT_FLAG_STREAM             0x00000002
 159
 160 /* ------------------------------------------------------------------------
 161  * Structures.
 162  */
 163
 164 struct uvc_device;
 165
 166 /* TODO: Put the most frequently accessed fields at the beginning of
 167  * structures to maximize cache efficiency.
 168  */
 169 struct uvc_control_info {
 170         struct list_head mappings;
 171
 172         __u8 entity[16];
 173         __u8 index;     /* Bit index in bmControls */
 174         __u8 selector;
 175
 176         __u16 size;
 177         __u32 flags;
 178 };
 179
 180 struct uvc_control_mapping {
 181         struct list_head list;
 182         struct list_head ev_subs;
 183
 184         __u32 id;
 185         __u8 name[32];
 186         __u8 entity[16];
 187         __u8 selector;
 188
 189         __u8 size;
 190         __u8 offset;
 191         enum v4l2_ctrl_type v4l2_type;
 192         __u32 data_type;
 193
 194         struct uvc_menu_info *menu_info;
 195         __u32 menu_count;
 196
 197         __u32 master_id;
 198         __s32 master_manual;
 199         __u32 slave_ids[2];
 200
 201         __s32 (*get) (struct uvc_control_mapping *mapping, __u8 query,
 202                       const __u8 *data);
 203         void (*set) (struct uvc_control_mapping *mapping, __s32 value,
 204                      __u8 *data);
 205 };
 206
 207 struct uvc_control {
 208         struct uvc_entity *entity;
 209         struct uvc_control_info info;
 210
 211         __u8 index;     /* Used to match the uvc_control entry with a
 212                            uvc_control_info. */
 213         __u8 dirty:1,
 214              loaded:1,
 215              modified:1,
 216              cached:1,
 217              initialized:1;
 218
 219         __u8 *uvc_data;
 220 };
 221
 222 struct uvc_format_desc {
 223         char *name;
 224         __u8 guid[16];
 225         __u32 fcc;
 226 };
 227
 228 /* The term 'entity' refers to both UVC units and UVC terminals.
 229  *
 230  * The type field is either the terminal type (wTerminalType in the terminal
 231  * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor).
 232  * As the bDescriptorSubtype field is one byte long, the type value will
 233  * always have a null MSB for units. All terminal types defined by the UVC
 234  * specification have a non-null MSB, so it is safe to use the MSB to
 235  * differentiate between units and terminals as long as the descriptor parsing
 236  * code makes sure terminal types have a non-null MSB.
 237  *
 238  * For terminals, the type's most significant bit stores the terminal
 239  * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should
 240  * always be accessed with the UVC_ENTITY_* macros and never directly.
 241  */
 242
 243 #define UVC_ENTITY_FLAG_DEFAULT         (1 << 0)
 244
 245 struct uvc_entity {
 246         struct list_head list;          /* Entity as part of a UVC device. */
 247         struct list_head chain;         /* Entity as part of a video device
 248                                          * chain. */
 249         unsigned int flags;
 250
 251         __u8 id;
 252         __u16 type;
 253         char name[64];
 254
 255         /* Media controller-related fields. */
 256         struct video_device *vdev;
 257         struct v4l2_subdev subdev;
 258         unsigned int num_pads;
 259         unsigned int num_links;
 260         struct media_pad *pads;
 261
 262         union {
 263                 struct {
 264                         __u16 wObjectiveFocalLengthMin;
 265                         __u16 wObjectiveFocalLengthMax;
 266                         __u16 wOcularFocalLength;
 267                         __u8  bControlSize;
 268                         __u8  *bmControls;
 269                 } camera;
 270
 271                 struct {
 272                         __u8  bControlSize;
 273                         __u8  *bmControls;
 274                         __u8  bTransportModeSize;
 275                         __u8  *bmTransportModes;
 276                 } media;
 277
 278                 struct {
 279                 } output;
 280
 281                 struct {
 282                         __u16 wMaxMultiplier;
 283                         __u8  bControlSize;
 284                         __u8  *bmControls;
 285                         __u8  bmVideoStandards;
 286                 } processing;
 287
 288                 struct {
 289                 } selector;
 290
 291                 struct {
 292                         __u8  guidExtensionCode[16];
 293                         __u8  bNumControls;
 294                         __u8  bControlSize;
 295                         __u8  *bmControls;
 296                         __u8  *bmControlsType;
 297                 } extension;
 298         };
 299
 300         __u8 bNrInPins;
 301         __u8 *baSourceID;
 302
 303         unsigned int ncontrols;
 304         struct uvc_control *controls;
 305 };
 306
 307 struct uvc_frame {
 308         __u8  bFrameIndex;
 309         __u8  bmCapabilities;
 310         __u16 wWidth;
 311         __u16 wHeight;
 312         __u32 dwMinBitRate;
 313         __u32 dwMaxBitRate;
 314         __u32 dwMaxVideoFrameBufferSize;
 315         __u8  bFrameIntervalType;
 316         __u32 dwDefaultFrameInterval;
 317         __u32 *dwFrameInterval;
 318 };
 319
 320 struct uvc_format {
 321         __u8 type;
 322         __u8 index;
 323         __u8 bpp;
 324         __u8 colorspace;
 325         __u32 fcc;
 326         __u32 flags;
 327
 328         char name[32];
 329
 330         unsigned int nframes;
 331         struct uvc_frame *frame;
 332 };
 333
 334 struct uvc_streaming_header {
 335         __u8 bNumFormats;
 336         __u8 bEndpointAddress;
 337         __u8 bTerminalLink;
 338         __u8 bControlSize;
 339         __u8 *bmaControls;
 340         /* The following fields are used by input headers only. */
 341         __u8 bmInfo;
 342         __u8 bStillCaptureMethod;
 343         __u8 bTriggerSupport;
 344         __u8 bTriggerUsage;
 345 };
 346
 347 enum uvc_buffer_state {
 348         UVC_BUF_STATE_IDLE      = 0,
 349         UVC_BUF_STATE_QUEUED    = 1,
 350         UVC_BUF_STATE_ACTIVE    = 2,
 351         UVC_BUF_STATE_READY     = 3,
 352         UVC_BUF_STATE_DONE      = 4,
 353         UVC_BUF_STATE_ERROR     = 5,
 354 };
 355
 356 struct uvc_buffer {
 357         struct vb2_v4l2_buffer buf;
 358         struct list_head queue;
 359
 360         enum uvc_buffer_state state;
 361         unsigned int error;
 362
 363         void *mem;
 364         unsigned int length;
 365         unsigned int bytesused;
 366
 367         u32 pts;
 368 };
 369
 370 #define UVC_QUEUE_DISCONNECTED          (1 << 0)
 371 #define UVC_QUEUE_DROP_CORRUPTED        (1 << 1)
 372
 373 struct uvc_video_queue {
 374         struct vb2_queue queue;
 375         struct mutex mutex;                     /* Protects queue */
 376
 377         unsigned int flags;
 378         unsigned int buf_used;
 379
 380         spinlock_t irqlock;                     /* Protects irqqueue */
 381         struct list_head irqqueue;
 382 };
 383
 384 struct uvc_video_chain {
 385         struct uvc_device *dev;
 386         struct list_head list;
 387
 388         struct list_head entities;              /* All entities */
 389         struct uvc_entity *processing;          /* Processing unit */
 390         struct uvc_entity *selector;            /* Selector unit */
 391
 392         struct mutex ctrl_mutex;                /* Protects ctrl.info */
 393
 394         struct v4l2_prio_state prio;            /* V4L2 priority state */
 395         u32 caps;                               /* V4L2 chain-wide caps */
 396 };
 397
 398 struct uvc_stats_frame {
 399         unsigned int size;              /* Number of bytes captured */
 400         unsigned int first_data;        /* Index of the first non-empty packet */
 401
 402         unsigned int nb_packets;        /* Number of packets */
 403         unsigned int nb_empty;          /* Number of empty packets */
 404         unsigned int nb_invalid;        /* Number of packets with an invalid header */
 405         unsigned int nb_errors;         /* Number of packets with the error bit set */
 406
 407         unsigned int nb_pts;            /* Number of packets with a PTS timestamp */
 408         unsigned int nb_pts_diffs;      /* Number of PTS differences inside a frame */
 409         unsigned int last_pts_diff;     /* Index of the last PTS difference */
 410         bool has_initial_pts;           /* Whether the first non-empty packet has a PTS */
 411         bool has_early_pts;             /* Whether a PTS is present before the first non-empty packet */
 412         u32 pts;                        /* PTS of the last packet */
 413
 414         unsigned int nb_scr;            /* Number of packets with a SCR timestamp */
 415         unsigned int nb_scr_diffs;      /* Number of SCR.STC differences inside a frame */
 416         u16 scr_sof;                    /* SCR.SOF of the last packet */
 417         u32 scr_stc;                    /* SCR.STC of the last packet */
 418 };
 419
 420 struct uvc_stats_stream {
 421         struct timespec start_ts;       /* Stream start timestamp */
 422         struct timespec stop_ts;        /* Stream stop timestamp */
 423
 424         unsigned int nb_frames;         /* Number of frames */
 425
 426         unsigned int nb_packets;        /* Number of packets */
 427         unsigned int nb_empty;          /* Number of empty packets */
 428         unsigned int nb_invalid;        /* Number of packets with an invalid header */
 429         unsigned int nb_errors;         /* Number of packets with the error bit set */
 430
 431         unsigned int nb_pts_constant;   /* Number of frames with constant PTS */
 432         unsigned int nb_pts_early;      /* Number of frames with early PTS */
 433         unsigned int nb_pts_initial;    /* Number of frames with initial PTS */
 434
 435         unsigned int nb_scr_count_ok;   /* Number of frames with at least one SCR per non empty packet */
 436         unsigned int nb_scr_diffs_ok;   /* Number of frames with varying SCR.STC */
 437         unsigned int scr_sof_count;     /* STC.SOF counter accumulated since stream start */
 438         unsigned int scr_sof;           /* STC.SOF of the last packet */
 439         unsigned int min_sof;           /* Minimum STC.SOF value */
 440         unsigned int max_sof;           /* Maximum STC.SOF value */
 441 };
 442
 443 struct uvc_streaming {
 444         struct list_head list;
 445         struct uvc_device *dev;
 446         struct video_device vdev;
 447         struct uvc_video_chain *chain;
 448         atomic_t active;
 449
 450         struct usb_interface *intf;
 451         int intfnum;
 452         __u16 maxpsize;
 453
 454         struct uvc_streaming_header header;
 455         enum v4l2_buf_type type;
 456
 457         unsigned int nformats;
 458         struct uvc_format *format;
 459
 460         struct uvc_streaming_control ctrl;
 461         struct uvc_format *def_format;
 462         struct uvc_format *cur_format;
 463         struct uvc_frame *cur_frame;
 464
 465         /* Protect access to ctrl, cur_format, cur_frame and hardware video
 466          * probe control.
 467          */
 468         struct mutex mutex;
 469
 470         /* Buffers queue. */
 471         unsigned int frozen : 1;
 472         struct uvc_video_queue queue;
 473         void (*decode) (struct urb *urb, struct uvc_streaming *video,
 474                         struct uvc_buffer *buf);
 475
 476         /* Context data used by the bulk completion handler. */
 477         struct {
 478                 __u8 header[256];
 479                 unsigned int header_size;
 480                 int skip_payload;
 481                 __u32 payload_size;
 482                 __u32 max_payload_size;
 483         } bulk;
 484
 485         struct urb *urb[UVC_URBS];
 486         char *urb_buffer[UVC_URBS];
 487         dma_addr_t urb_dma[UVC_URBS];
 488         unsigned int urb_size;
 489
 490         __u32 sequence;
 491         __u8 last_fid;
 492
 493         /* debugfs */
 494         struct dentry *debugfs_dir;
 495         struct {
 496                 struct uvc_stats_frame frame;
 497                 struct uvc_stats_stream stream;
 498         } stats;
 499
 500         /* Timestamps support. */
 501         struct uvc_clock {
 502                 struct uvc_clock_sample {
 503                         u32 dev_stc;
 504                         u16 dev_sof;
 505                         struct timespec host_ts;
 506                         u16 host_sof;
 507                 } *samples;
 508
 509                 unsigned int head;
 510                 unsigned int count;
 511                 unsigned int size;
 512
 513                 u16 last_sof;
 514                 u16 sof_offset;
 515
 516                 spinlock_t lock;
 517         } clock;
 518 };
 519
 520 struct uvc_device {
 521         struct usb_device *udev;
 522         struct usb_interface *intf;
 523         unsigned long warnings;
 524         __u32 quirks;
 525         int intfnum;
 526         char name[32];
 527
 528         struct mutex lock;              /* Protects users */
 529         unsigned int users;
 530         atomic_t nmappings;
 531
 532         /* Video control interface */
 533 #ifdef CONFIG_MEDIA_CONTROLLER
 534         struct media_device mdev;
 535 #endif
 536         struct v4l2_device vdev;
 537         __u16 uvc_version;
 538         __u32 clock_frequency;
 539
 540         struct list_head entities;
 541         struct list_head chains;
 542
 543         /* Video Streaming interfaces */
 544         struct list_head streams;
 545         atomic_t nstreams;
 546
 547         /* Status Interrupt Endpoint */
 548         struct usb_host_endpoint *int_ep;
 549         struct urb *int_urb;
 550         __u8 *status;
 551         struct input_dev *input;
 552         char input_phys[64];
 553 };
 554
 555 enum uvc_handle_state {
 556         UVC_HANDLE_PASSIVE      = 0,
 557         UVC_HANDLE_ACTIVE       = 1,
 558 };
 559
 560 struct uvc_fh {
 561         struct v4l2_fh vfh;
 562         struct uvc_video_chain *chain;
 563         struct uvc_streaming *stream;
 564         enum uvc_handle_state state;
 565 };
 566
 567 struct uvc_driver {
 568         struct usb_driver driver;
 569 };
 570
 571 /* ------------------------------------------------------------------------
 572  * Debugging, printing and logging
 573  */
 574
 575 #define UVC_TRACE_PROBE         (1 << 0)
 576 #define UVC_TRACE_DESCR         (1 << 1)
 577 #define UVC_TRACE_CONTROL       (1 << 2)
 578 #define UVC_TRACE_FORMAT        (1 << 3)
 579 #define UVC_TRACE_CAPTURE       (1 << 4)
 580 #define UVC_TRACE_CALLS         (1 << 5)
 581 #define UVC_TRACE_FRAME         (1 << 7)
 582 #define UVC_TRACE_SUSPEND       (1 << 8)
 583 #define UVC_TRACE_STATUS        (1 << 9)
 584 #define UVC_TRACE_VIDEO         (1 << 10)
 585 #define UVC_TRACE_STATS         (1 << 11)
 586 #define UVC_TRACE_CLOCK         (1 << 12)
 587
 588 #define UVC_WARN_MINMAX         0
 589 #define UVC_WARN_PROBE_DEF      1
 590 #define UVC_WARN_XU_GET_RES     2
 591
 592 extern unsigned int uvc_clock_param;
 593 extern unsigned int uvc_no_drop_param;
 594 extern unsigned int uvc_trace_param;
 595 extern unsigned int uvc_timeout_param;
 596 extern unsigned int uvc_hw_timestamps_param;
 597
 598 #define uvc_trace(flag, msg...) \
 599         do { \
 600                 if (uvc_trace_param & flag) \
 601                         printk(KERN_DEBUG "uvcvideo: " msg); \
 602         } while (0)
 603
 604 #define uvc_warn_once(dev, warn, msg...) \
 605         do { \
 606                 if (!test_and_set_bit(warn, &dev->warnings)) \
 607                         printk(KERN_INFO "uvcvideo: " msg); \
 608         } while (0)
 609
 610 #define uvc_printk(level, msg...) \
 611         printk(level "uvcvideo: " msg)
 612
 613 /* --------------------------------------------------------------------------
 614  * Internal functions.
 615  */
 616
 617 /* Core driver */
 618 extern struct uvc_driver uvc_driver;
 619
 620 extern struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id);
 621
 622 /* Video buffers queue management. */
 623 extern int uvc_queue_init(struct uvc_video_queue *queue,
 624                 enum v4l2_buf_type type, int drop_corrupted);
 625 extern void uvc_queue_release(struct uvc_video_queue *queue);
 626 extern int uvc_request_buffers(struct uvc_video_queue *queue,
 627                 struct v4l2_requestbuffers *rb);
 628 extern int uvc_query_buffer(struct uvc_video_queue *queue,
 629                 struct v4l2_buffer *v4l2_buf);
 630 extern int uvc_create_buffers(struct uvc_video_queue *queue,
 631                 struct v4l2_create_buffers *v4l2_cb);
 632 extern int uvc_queue_buffer(struct uvc_video_queue *queue,
 633                 struct v4l2_buffer *v4l2_buf);
 634 extern int uvc_export_buffer(struct uvc_video_queue *queue,
 635                 struct v4l2_exportbuffer *exp);
 636 extern int uvc_dequeue_buffer(struct uvc_video_queue *queue,
 637                 struct v4l2_buffer *v4l2_buf, int nonblocking);
 638 extern int uvc_queue_streamon(struct uvc_video_queue *queue,
 639                               enum v4l2_buf_type type);
 640 extern int uvc_queue_streamoff(struct uvc_video_queue *queue,
 641                                enum v4l2_buf_type type);
 642 extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
 643 extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
 644                 struct uvc_buffer *buf);
 645 extern int uvc_queue_mmap(struct uvc_video_queue *queue,
 646                 struct vm_area_struct *vma);
 647 extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue,
 648                 struct file *file, poll_table *wait);
 649 #ifndef CONFIG_MMU
 650 extern unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
 651                 unsigned long pgoff);
 652 #endif
 653 extern int uvc_queue_allocated(struct uvc_video_queue *queue);
 654 static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
 655 {
 656         return vb2_is_streaming(&queue->queue);
 657 }
 658
 659 /* V4L2 interface */
 660 extern const struct v4l2_ioctl_ops uvc_ioctl_ops;
 661 extern const struct v4l2_file_operations uvc_fops;
 662
 663 /* Media controller */
 664 extern int uvc_mc_register_entities(struct uvc_video_chain *chain);
 665 extern void uvc_mc_cleanup_entity(struct uvc_entity *entity);
 666
 667 /* Video */
 668 extern int uvc_video_init(struct uvc_streaming *stream);
 669 extern int uvc_video_suspend(struct uvc_streaming *stream);
 670 extern int uvc_video_resume(struct uvc_streaming *stream, int reset);
 671 extern int uvc_video_enable(struct uvc_streaming *stream, int enable);
 672 extern int uvc_probe_video(struct uvc_streaming *stream,
 673                 struct uvc_streaming_control *probe);
 674 extern int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit,
 675                 __u8 intfnum, __u8 cs, void *data, __u16 size);
 676 void uvc_video_clock_update(struct uvc_streaming *stream,
 677                             struct vb2_v4l2_buffer *vbuf,
 678                             struct uvc_buffer *buf);
 679
 680 /* Status */
 681 extern int uvc_status_init(struct uvc_device *dev);
 682 extern void uvc_status_cleanup(struct uvc_device *dev);
 683 extern int uvc_status_start(struct uvc_device *dev, gfp_t flags);
 684 extern void uvc_status_stop(struct uvc_device *dev);
 685
 686 /* Controls */
 687 extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops;
 688
 689 extern int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
 690                 struct v4l2_queryctrl *v4l2_ctrl);
 691 extern int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
 692                 struct v4l2_querymenu *query_menu);
 693
 694 extern int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
 695                 const struct uvc_control_mapping *mapping);
 696 extern int uvc_ctrl_init_device(struct uvc_device *dev);
 697 extern void uvc_ctrl_cleanup_device(struct uvc_device *dev);
 698 extern int uvc_ctrl_restore_values(struct uvc_device *dev);
 699
 700 extern int uvc_ctrl_begin(struct uvc_video_chain *chain);
 701 extern int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback,
 702                         const struct v4l2_ext_control *xctrls,
 703                         unsigned int xctrls_count);
 704 static inline int uvc_ctrl_commit(struct uvc_fh *handle,
 705                         const struct v4l2_ext_control *xctrls,
 706                         unsigned int xctrls_count)
 707 {
 708         return __uvc_ctrl_commit(handle, 0, xctrls, xctrls_count);
 709 }
 710 static inline int uvc_ctrl_rollback(struct uvc_fh *handle)
 711 {
 712         return __uvc_ctrl_commit(handle, 1, NULL, 0);
 713 }
 714
 715 extern int uvc_ctrl_get(struct uvc_video_chain *chain,
 716                 struct v4l2_ext_control *xctrl);
 717 extern int uvc_ctrl_set(struct uvc_video_chain *chain,
 718                 struct v4l2_ext_control *xctrl);
 719
 720 extern int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
 721                 struct uvc_xu_control_query *xqry);
 722
 723 /* Utility functions */
 724 extern void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
 725                 unsigned int n_terms, unsigned int threshold);
 726 extern uint32_t uvc_fraction_to_interval(uint32_t numerator,
 727                 uint32_t denominator);
 728 extern struct usb_host_endpoint *uvc_find_endpoint(
 729                 struct usb_host_interface *alts, __u8 epaddr);
 730
 731 /* Quirks support */
 732 void uvc_video_decode_isight(struct urb *urb, struct uvc_streaming *stream,
 733                 struct uvc_buffer *buf);
 734
 735 /* debugfs and statistics */
 736 int uvc_debugfs_init(void);
 737 void uvc_debugfs_cleanup(void);
 738 int uvc_debugfs_init_stream(struct uvc_streaming *stream);
 739 void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream);
 740
 741 size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf,
 742                             size_t size);
 743
 744 #endif