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-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_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_M420 \
 113         { 'M',  '4',  '2',  '0', 0x00, 0x00, 0x10, 0x00, \
 114          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 115
 116 #define UVC_GUID_FORMAT_H264 \
 117         { 'H',  '2',  '6',  '4', 0x00, 0x00, 0x10, 0x00, \
 118          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 119
 120 /* ------------------------------------------------------------------------
 121  * Driver specific constants.
 122  */
 123
 124 #define DRIVER_VERSION          "1.1.1"
 125
 126 /* Number of isochronous URBs. */
 127 #define UVC_URBS                5
 128 /* Maximum number of packets per URB. */
 129 #define UVC_MAX_PACKETS         32
 130 /* Maximum status buffer size in bytes of interrupt URB. */
 131 #define UVC_MAX_STATUS_SIZE     16
 132
 133 #define UVC_CTRL_CONTROL_TIMEOUT        300
 134 #define UVC_CTRL_STREAMING_TIMEOUT      5000
 135
 136 /* Maximum allowed number of control mappings per device */
 137 #define UVC_MAX_CONTROL_MAPPINGS        1024
 138 #define UVC_MAX_CONTROL_MENU_ENTRIES    32
 139
 140 /* Devices quirks */
 141 #define UVC_QUIRK_STATUS_INTERVAL       0x00000001
 142 #define UVC_QUIRK_PROBE_MINMAX          0x00000002
 143 #define UVC_QUIRK_PROBE_EXTRAFIELDS     0x00000004
 144 #define UVC_QUIRK_BUILTIN_ISIGHT        0x00000008
 145 #define UVC_QUIRK_STREAM_NO_FID         0x00000010
 146 #define UVC_QUIRK_IGNORE_SELECTOR_UNIT  0x00000020
 147 #define UVC_QUIRK_FIX_BANDWIDTH         0x00000080
 148 #define UVC_QUIRK_PROBE_DEF             0x00000100
 149 #define UVC_QUIRK_RESTRICT_FRAME_RATE   0x00000200
 150
 151 /* Format flags */
 152 #define UVC_FMT_FLAG_COMPRESSED         0x00000001
 153 #define UVC_FMT_FLAG_STREAM             0x00000002
 154
 155 /* ------------------------------------------------------------------------
 156  * Structures.
 157  */
 158
 159 struct uvc_device;
 160
 161 /* TODO: Put the most frequently accessed fields at the beginning of
 162  * structures to maximize cache efficiency.
 163  */
 164 struct uvc_control_info {
 165         struct list_head mappings;
 166
 167         __u8 entity[16];
 168         __u8 index;     /* Bit index in bmControls */
 169         __u8 selector;
 170
 171         __u16 size;
 172         __u32 flags;
 173 };
 174
 175 struct uvc_control_mapping {
 176         struct list_head list;
 177         struct list_head ev_subs;
 178
 179         __u32 id;
 180         __u8 name[32];
 181         __u8 entity[16];
 182         __u8 selector;
 183
 184         __u8 size;
 185         __u8 offset;
 186         enum v4l2_ctrl_type v4l2_type;
 187         __u32 data_type;
 188
 189         struct uvc_menu_info *menu_info;
 190         __u32 menu_count;
 191
 192         __u32 master_id;
 193         __s32 master_manual;
 194         __u32 slave_ids[2];
 195
 196         __s32 (*get) (struct uvc_control_mapping *mapping, __u8 query,
 197                       const __u8 *data);
 198         void (*set) (struct uvc_control_mapping *mapping, __s32 value,
 199                      __u8 *data);
 200 };
 201
 202 struct uvc_control {
 203         struct uvc_entity *entity;
 204         struct uvc_control_info info;
 205
 206         __u8 index;     /* Used to match the uvc_control entry with a
 207                            uvc_control_info. */
 208         __u8 dirty:1,
 209              loaded:1,
 210              modified:1,
 211              cached:1,
 212              initialized:1;
 213
 214         __u8 *uvc_data;
 215 };
 216
 217 struct uvc_format_desc {
 218         char *name;
 219         __u8 guid[16];
 220         __u32 fcc;
 221 };
 222
 223 /* The term 'entity' refers to both UVC units and UVC terminals.
 224  *
 225  * The type field is either the terminal type (wTerminalType in the terminal
 226  * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor).
 227  * As the bDescriptorSubtype field is one byte long, the type value will
 228  * always have a null MSB for units. All terminal types defined by the UVC
 229  * specification have a non-null MSB, so it is safe to use the MSB to
 230  * differentiate between units and terminals as long as the descriptor parsing
 231  * code makes sure terminal types have a non-null MSB.
 232  *
 233  * For terminals, the type's most significant bit stores the terminal
 234  * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should
 235  * always be accessed with the UVC_ENTITY_* macros and never directly.
 236  */
 237
 238 #define UVC_ENTITY_FLAG_DEFAULT         (1 << 0)
 239
 240 struct uvc_entity {
 241         struct list_head list;          /* Entity as part of a UVC device. */
 242         struct list_head chain;         /* Entity as part of a video device
 243                                          * chain. */
 244         unsigned int flags;
 245
 246         __u8 id;
 247         __u16 type;
 248         char name[64];
 249
 250         /* Media controller-related fields. */
 251         struct video_device *vdev;
 252         struct v4l2_subdev subdev;
 253         unsigned int num_pads;
 254         unsigned int num_links;
 255         struct media_pad *pads;
 256
 257         union {
 258                 struct {
 259                         __u16 wObjectiveFocalLengthMin;
 260                         __u16 wObjectiveFocalLengthMax;
 261                         __u16 wOcularFocalLength;
 262                         __u8  bControlSize;
 263                         __u8  *bmControls;
 264                 } camera;
 265
 266                 struct {
 267                         __u8  bControlSize;
 268                         __u8  *bmControls;
 269                         __u8  bTransportModeSize;
 270                         __u8  *bmTransportModes;
 271                 } media;
 272
 273                 struct {
 274                 } output;
 275
 276                 struct {
 277                         __u16 wMaxMultiplier;
 278                         __u8  bControlSize;
 279                         __u8  *bmControls;
 280                         __u8  bmVideoStandards;
 281                 } processing;
 282
 283                 struct {
 284                 } selector;
 285
 286                 struct {
 287                         __u8  guidExtensionCode[16];
 288                         __u8  bNumControls;
 289                         __u8  bControlSize;
 290                         __u8  *bmControls;
 291                         __u8  *bmControlsType;
 292                 } extension;
 293         };
 294
 295         __u8 bNrInPins;
 296         __u8 *baSourceID;
 297
 298         unsigned int ncontrols;
 299         struct uvc_control *controls;
 300 };
 301
 302 struct uvc_frame {
 303         __u8  bFrameIndex;
 304         __u8  bmCapabilities;
 305         __u16 wWidth;
 306         __u16 wHeight;
 307         __u32 dwMinBitRate;
 308         __u32 dwMaxBitRate;
 309         __u32 dwMaxVideoFrameBufferSize;
 310         __u8  bFrameIntervalType;
 311         __u32 dwDefaultFrameInterval;
 312         __u32 *dwFrameInterval;
 313 };
 314
 315 struct uvc_format {
 316         __u8 type;
 317         __u8 index;
 318         __u8 bpp;
 319         __u8 colorspace;
 320         __u32 fcc;
 321         __u32 flags;
 322
 323         char name[32];
 324
 325         unsigned int nframes;
 326         struct uvc_frame *frame;
 327 };
 328
 329 struct uvc_streaming_header {
 330         __u8 bNumFormats;
 331         __u8 bEndpointAddress;
 332         __u8 bTerminalLink;
 333         __u8 bControlSize;
 334         __u8 *bmaControls;
 335         /* The following fields are used by input headers only. */
 336         __u8 bmInfo;
 337         __u8 bStillCaptureMethod;
 338         __u8 bTriggerSupport;
 339         __u8 bTriggerUsage;
 340 };
 341
 342 enum uvc_buffer_state {
 343         UVC_BUF_STATE_IDLE      = 0,
 344         UVC_BUF_STATE_QUEUED    = 1,
 345         UVC_BUF_STATE_ACTIVE    = 2,
 346         UVC_BUF_STATE_READY     = 3,
 347         UVC_BUF_STATE_DONE      = 4,
 348         UVC_BUF_STATE_ERROR     = 5,
 349 };
 350
 351 struct uvc_buffer {
 352         struct vb2_buffer buf;
 353         struct list_head queue;
 354
 355         enum uvc_buffer_state state;
 356         unsigned int error;
 357
 358         void *mem;
 359         unsigned int length;
 360         unsigned int bytesused;
 361
 362         u32 pts;
 363 };
 364
 365 #define UVC_QUEUE_DISCONNECTED          (1 << 0)
 366 #define UVC_QUEUE_DROP_CORRUPTED        (1 << 1)
 367
 368 struct uvc_video_queue {
 369         struct vb2_queue queue;
 370         struct mutex mutex;                     /* Protects queue */
 371
 372         unsigned int flags;
 373         unsigned int buf_used;
 374
 375         spinlock_t irqlock;                     /* Protects irqqueue */
 376         struct list_head irqqueue;
 377 };
 378
 379 struct uvc_video_chain {
 380         struct uvc_device *dev;
 381         struct list_head list;
 382
 383         struct list_head entities;              /* All entities */
 384         struct uvc_entity *processing;          /* Processing unit */
 385         struct uvc_entity *selector;            /* Selector unit */
 386
 387         struct mutex ctrl_mutex;                /* Protects ctrl.info */
 388
 389         struct v4l2_prio_state prio;            /* V4L2 priority state */
 390         u32 caps;                               /* V4L2 chain-wide caps */
 391 };
 392
 393 struct uvc_stats_frame {
 394         unsigned int size;              /* Number of bytes captured */
 395         unsigned int first_data;        /* Index of the first non-empty packet */
 396
 397         unsigned int nb_packets;        /* Number of packets */
 398         unsigned int nb_empty;          /* Number of empty packets */
 399         unsigned int nb_invalid;        /* Number of packets with an invalid header */
 400         unsigned int nb_errors;         /* Number of packets with the error bit set */
 401
 402         unsigned int nb_pts;            /* Number of packets with a PTS timestamp */
 403         unsigned int nb_pts_diffs;      /* Number of PTS differences inside a frame */
 404         unsigned int last_pts_diff;     /* Index of the last PTS difference */
 405         bool has_initial_pts;           /* Whether the first non-empty packet has a PTS */
 406         bool has_early_pts;             /* Whether a PTS is present before the first non-empty packet */
 407         u32 pts;                        /* PTS of the last packet */
 408
 409         unsigned int nb_scr;            /* Number of packets with a SCR timestamp */
 410         unsigned int nb_scr_diffs;      /* Number of SCR.STC differences inside a frame */
 411         u16 scr_sof;                    /* SCR.SOF of the last packet */
 412         u32 scr_stc;                    /* SCR.STC of the last packet */
 413 };
 414
 415 struct uvc_stats_stream {
 416         struct timespec start_ts;       /* Stream start timestamp */
 417         struct timespec stop_ts;        /* Stream stop timestamp */
 418
 419         unsigned int nb_frames;         /* Number of frames */
 420
 421         unsigned int nb_packets;        /* Number of packets */
 422         unsigned int nb_empty;          /* Number of empty packets */
 423         unsigned int nb_invalid;        /* Number of packets with an invalid header */
 424         unsigned int nb_errors;         /* Number of packets with the error bit set */
 425
 426         unsigned int nb_pts_constant;   /* Number of frames with constant PTS */
 427         unsigned int nb_pts_early;      /* Number of frames with early PTS */
 428         unsigned int nb_pts_initial;    /* Number of frames with initial PTS */
 429
 430         unsigned int nb_scr_count_ok;   /* Number of frames with at least one SCR per non empty packet */
 431         unsigned int nb_scr_diffs_ok;   /* Number of frames with varying SCR.STC */
 432         unsigned int scr_sof_count;     /* STC.SOF counter accumulated since stream start */
 433         unsigned int scr_sof;           /* STC.SOF of the last packet */
 434         unsigned int min_sof;           /* Minimum STC.SOF value */
 435         unsigned int max_sof;           /* Maximum STC.SOF value */
 436 };
 437
 438 struct uvc_streaming {
 439         struct list_head list;
 440         struct uvc_device *dev;
 441         struct video_device *vdev;
 442         struct uvc_video_chain *chain;
 443         atomic_t active;
 444
 445         struct usb_interface *intf;
 446         int intfnum;
 447         __u16 maxpsize;
 448
 449         struct uvc_streaming_header header;
 450         enum v4l2_buf_type type;
 451
 452         unsigned int nformats;
 453         struct uvc_format *format;
 454
 455         struct uvc_streaming_control ctrl;
 456         struct uvc_format *def_format;
 457         struct uvc_format *cur_format;
 458         struct uvc_frame *cur_frame;
 459         /* Protect access to ctrl, cur_format, cur_frame and hardware video
 460          * probe control.
 461          */
 462         struct mutex mutex;
 463
 464         /* Buffers queue. */
 465         unsigned int frozen : 1;
 466         struct uvc_video_queue queue;
 467         void (*decode) (struct urb *urb, struct uvc_streaming *video,
 468                         struct uvc_buffer *buf);
 469
 470         /* Context data used by the bulk completion handler. */
 471         struct {
 472                 __u8 header[256];
 473                 unsigned int header_size;
 474                 int skip_payload;
 475                 __u32 payload_size;
 476                 __u32 max_payload_size;
 477         } bulk;
 478
 479         struct urb *urb[UVC_URBS];
 480         char *urb_buffer[UVC_URBS];
 481         dma_addr_t urb_dma[UVC_URBS];
 482         unsigned int urb_size;
 483
 484         __u32 sequence;
 485         __u8 last_fid;
 486
 487         /* debugfs */
 488         struct dentry *debugfs_dir;
 489         struct {
 490                 struct uvc_stats_frame frame;
 491                 struct uvc_stats_stream stream;
 492         } stats;
 493
 494         /* Timestamps support. */
 495         struct uvc_clock {
 496                 struct uvc_clock_sample {
 497                         u32 dev_stc;
 498                         u16 dev_sof;
 499                         struct timespec host_ts;
 500                         u16 host_sof;
 501                 } *samples;
 502
 503                 unsigned int head;
 504                 unsigned int count;
 505                 unsigned int size;
 506
 507                 u16 last_sof;
 508                 u16 sof_offset;
 509
 510                 spinlock_t lock;
 511         } clock;
 512 };
 513
 514 enum uvc_device_state {
 515         UVC_DEV_DISCONNECTED = 1,
 516 };
 517
 518 struct uvc_device {
 519         struct usb_device *udev;
 520         struct usb_interface *intf;
 521         unsigned long warnings;
 522         __u32 quirks;
 523         int intfnum;
 524         char name[32];
 525
 526         enum uvc_device_state state;
 527         struct mutex lock;              /* Protects users */
 528         unsigned int users;
 529         atomic_t nmappings;
 530
 531         /* Video control interface */
 532 #ifdef CONFIG_MEDIA_CONTROLLER
 533         struct media_device mdev;
 534 #endif
 535         struct v4l2_device vdev;
 536         __u16 uvc_version;
 537         __u32 clock_frequency;
 538
 539         struct list_head entities;
 540         struct list_head chains;
 541
 542         /* Video Streaming interfaces */
 543         struct list_head streams;
 544         atomic_t nstreams;
 545
 546         /* Status Interrupt Endpoint */
 547         struct usb_host_endpoint *int_ep;
 548         struct urb *int_urb;
 549         __u8 *status;
 550         struct input_dev *input;
 551         char input_phys[64];
 552 };
 553
 554 enum uvc_handle_state {
 555         UVC_HANDLE_PASSIVE      = 0,
 556         UVC_HANDLE_ACTIVE       = 1,
 557 };
 558
 559 struct uvc_fh {
 560         struct v4l2_fh vfh;
 561         struct uvc_video_chain *chain;
 562         struct uvc_streaming *stream;
 563         enum uvc_handle_state state;
 564 };
 565
 566 struct uvc_driver {
 567         struct usb_driver driver;
 568 };
 569
 570 /* ------------------------------------------------------------------------
 571  * Debugging, printing and logging
 572  */
 573
 574 #define UVC_TRACE_PROBE         (1 << 0)
 575 #define UVC_TRACE_DESCR         (1 << 1)
 576 #define UVC_TRACE_CONTROL       (1 << 2)
 577 #define UVC_TRACE_FORMAT        (1 << 3)
 578 #define UVC_TRACE_CAPTURE       (1 << 4)
 579 #define UVC_TRACE_CALLS         (1 << 5)
 580 #define UVC_TRACE_IOCTL         (1 << 6)
 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
 597 #define uvc_trace(flag, msg...) \
 598         do { \
 599                 if (uvc_trace_param & flag) \
 600                         printk(KERN_DEBUG "uvcvideo: " msg); \
 601         } while (0)
 602
 603 #define uvc_warn_once(dev, warn, msg...) \
 604         do { \
 605                 if (!test_and_set_bit(warn, &dev->warnings)) \
 606                         printk(KERN_INFO "uvcvideo: " msg); \
 607         } while (0)
 608
 609 #define uvc_printk(level, msg...) \
 610         printk(level "uvcvideo: " msg)
 611
 612 /* --------------------------------------------------------------------------
 613  * Internal functions.
 614  */
 615
 616 /* Core driver */
 617 extern struct uvc_driver uvc_driver;
 618
 619 extern struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id);
 620
 621 /* Video buffers queue management. */
 622 extern int uvc_queue_init(struct uvc_video_queue *queue,
 623                 enum v4l2_buf_type type, int drop_corrupted);
 624 extern int uvc_alloc_buffers(struct uvc_video_queue *queue,
 625                 struct v4l2_requestbuffers *rb);
 626 extern void uvc_free_buffers(struct uvc_video_queue *queue);
 627 extern int uvc_query_buffer(struct uvc_video_queue *queue,
 628                 struct v4l2_buffer *v4l2_buf);
 629 extern int uvc_create_buffers(struct uvc_video_queue *queue,
 630                 struct v4l2_create_buffers *v4l2_cb);
 631 extern int uvc_queue_buffer(struct uvc_video_queue *queue,
 632                 struct v4l2_buffer *v4l2_buf);
 633 extern int uvc_dequeue_buffer(struct uvc_video_queue *queue,
 634                 struct v4l2_buffer *v4l2_buf, int nonblocking);
 635 extern int uvc_queue_enable(struct uvc_video_queue *queue, int enable);
 636 extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
 637 extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
 638                 struct uvc_buffer *buf);
 639 extern int uvc_queue_mmap(struct uvc_video_queue *queue,
 640                 struct vm_area_struct *vma);
 641 extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue,
 642                 struct file *file, poll_table *wait);
 643 #ifndef CONFIG_MMU
 644 extern unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
 645                 unsigned long pgoff);
 646 #endif
 647 extern int uvc_queue_allocated(struct uvc_video_queue *queue);
 648 static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
 649 {
 650         return vb2_is_streaming(&queue->queue);
 651 }
 652
 653 /* V4L2 interface */
 654 extern const struct v4l2_file_operations uvc_fops;
 655
 656 /* Media controller */
 657 extern int uvc_mc_register_entities(struct uvc_video_chain *chain);
 658 extern void uvc_mc_cleanup_entity(struct uvc_entity *entity);
 659
 660 /* Video */
 661 extern int uvc_video_init(struct uvc_streaming *stream);
 662 extern int uvc_video_suspend(struct uvc_streaming *stream);
 663 extern int uvc_video_resume(struct uvc_streaming *stream, int reset);
 664 extern int uvc_video_enable(struct uvc_streaming *stream, int enable);
 665 extern int uvc_probe_video(struct uvc_streaming *stream,
 666                 struct uvc_streaming_control *probe);
 667 extern int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit,
 668                 __u8 intfnum, __u8 cs, void *data, __u16 size);
 669 void uvc_video_clock_update(struct uvc_streaming *stream,
 670                             struct v4l2_buffer *v4l2_buf,
 671                             struct uvc_buffer *buf);
 672
 673 /* Status */
 674 extern int uvc_status_init(struct uvc_device *dev);
 675 extern void uvc_status_cleanup(struct uvc_device *dev);
 676 extern int uvc_status_start(struct uvc_device *dev, gfp_t flags);
 677 extern void uvc_status_stop(struct uvc_device *dev);
 678
 679 /* Controls */
 680 extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops;
 681
 682 extern int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
 683                 struct v4l2_queryctrl *v4l2_ctrl);
 684 extern int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
 685                 struct v4l2_querymenu *query_menu);
 686
 687 extern int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
 688                 const struct uvc_control_mapping *mapping);
 689 extern int uvc_ctrl_init_device(struct uvc_device *dev);
 690 extern void uvc_ctrl_cleanup_device(struct uvc_device *dev);
 691 extern int uvc_ctrl_resume_device(struct uvc_device *dev);
 692
 693 extern int uvc_ctrl_begin(struct uvc_video_chain *chain);
 694 extern int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback,
 695                         const struct v4l2_ext_control *xctrls,
 696                         unsigned int xctrls_count);
 697 static inline int uvc_ctrl_commit(struct uvc_fh *handle,
 698                         const struct v4l2_ext_control *xctrls,
 699                         unsigned int xctrls_count)
 700 {
 701         return __uvc_ctrl_commit(handle, 0, xctrls, xctrls_count);
 702 }
 703 static inline int uvc_ctrl_rollback(struct uvc_fh *handle)
 704 {
 705         return __uvc_ctrl_commit(handle, 1, NULL, 0);
 706 }
 707
 708 extern int uvc_ctrl_get(struct uvc_video_chain *chain,
 709                 struct v4l2_ext_control *xctrl);
 710 extern int uvc_ctrl_set(struct uvc_video_chain *chain,
 711                 struct v4l2_ext_control *xctrl);
 712
 713 extern int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
 714                 struct uvc_xu_control_query *xqry);
 715
 716 /* Utility functions */
 717 extern void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
 718                 unsigned int n_terms, unsigned int threshold);
 719 extern uint32_t uvc_fraction_to_interval(uint32_t numerator,
 720                 uint32_t denominator);
 721 extern struct usb_host_endpoint *uvc_find_endpoint(
 722                 struct usb_host_interface *alts, __u8 epaddr);
 723
 724 /* Quirks support */
 725 void uvc_video_decode_isight(struct urb *urb, struct uvc_streaming *stream,
 726                 struct uvc_buffer *buf);
 727
 728 /* debugfs and statistics */
 729 int uvc_debugfs_init(void);
 730 void uvc_debugfs_cleanup(void);
 731 int uvc_debugfs_init_stream(struct uvc_streaming *stream);
 732 void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream);
 733
 734 size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf,
 735                             size_t size);
 736
 737 #endif