drivers/media/usb/uvc/uvcvideo.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _USB_VIDEO_H_
   3 #define _USB_VIDEO_H_
   4
   5 #ifndef __KERNEL__
   6 #error "The uvcvideo.h header is deprecated, use linux/uvcvideo.h instead."
   7 #endif /* __KERNEL__ */
   8
   9 #include <linux/kernel.h>
  10 #include <linux/poll.h>
  11 #include <linux/usb.h>
  12 #include <linux/usb/video.h>
  13 #include <linux/uvcvideo.h>
  14 #include <linux/videodev2.h>
  15 #include <media/media-device.h>
  16 #include <media/v4l2-device.h>
  17 #include <media/v4l2-event.h>
  18 #include <media/v4l2-fh.h>
  19 #include <media/videobuf2-v4l2.h>
  20
  21 /* --------------------------------------------------------------------------
  22  * UVC constants
  23  */
  24
  25 #define UVC_TERM_INPUT                  0x0000
  26 #define UVC_TERM_OUTPUT                 0x8000
  27 #define UVC_TERM_DIRECTION(term)        ((term)->type & 0x8000)
  28
  29 #define UVC_ENTITY_TYPE(entity)         ((entity)->type & 0x7fff)
  30 #define UVC_ENTITY_IS_UNIT(entity)      (((entity)->type & 0xff00) == 0)
  31 #define UVC_ENTITY_IS_TERM(entity)      (((entity)->type & 0xff00) != 0)
  32 #define UVC_ENTITY_IS_ITERM(entity) \
  33         (UVC_ENTITY_IS_TERM(entity) && \
  34         ((entity)->type & 0x8000) == UVC_TERM_INPUT)
  35 #define UVC_ENTITY_IS_OTERM(entity) \
  36         (UVC_ENTITY_IS_TERM(entity) && \
  37         ((entity)->type & 0x8000) == UVC_TERM_OUTPUT)
  38
  39
  40 /* ------------------------------------------------------------------------
  41  * GUIDs
  42  */
  43 #define UVC_GUID_UVC_CAMERA \
  44         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  45          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}
  46 #define UVC_GUID_UVC_OUTPUT \
  47         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  48          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}
  49 #define UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT \
  50         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  51          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03}
  52 #define UVC_GUID_UVC_PROCESSING \
  53         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  54          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01}
  55 #define UVC_GUID_UVC_SELECTOR \
  56         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  57          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02}
  58
  59 #define UVC_GUID_FORMAT_MJPEG \
  60         { 'M',  'J',  'P',  'G', 0x00, 0x00, 0x10, 0x00, \
  61          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  62 #define UVC_GUID_FORMAT_YUY2 \
  63         { 'Y',  'U',  'Y',  '2', 0x00, 0x00, 0x10, 0x00, \
  64          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  65 #define UVC_GUID_FORMAT_YUY2_ISIGHT \
  66         { 'Y',  'U',  'Y',  '2', 0x00, 0x00, 0x10, 0x00, \
  67          0x80, 0x00, 0x00, 0x00, 0x00, 0x38, 0x9b, 0x71}
  68 #define UVC_GUID_FORMAT_NV12 \
  69         { 'N',  'V',  '1',  '2', 0x00, 0x00, 0x10, 0x00, \
  70          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  71 #define UVC_GUID_FORMAT_YV12 \
  72         { 'Y',  'V',  '1',  '2', 0x00, 0x00, 0x10, 0x00, \
  73          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  74 #define UVC_GUID_FORMAT_I420 \
  75         { 'I',  '4',  '2',  '0', 0x00, 0x00, 0x10, 0x00, \
  76          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  77 #define UVC_GUID_FORMAT_UYVY \
  78         { 'U',  'Y',  'V',  'Y', 0x00, 0x00, 0x10, 0x00, \
  79          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  80 #define UVC_GUID_FORMAT_Y800 \
  81         { 'Y',  '8',  '0',  '0', 0x00, 0x00, 0x10, 0x00, \
  82          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  83 #define UVC_GUID_FORMAT_Y8 \
  84         { 'Y',  '8',  ' ',  ' ', 0x00, 0x00, 0x10, 0x00, \
  85          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  86 #define UVC_GUID_FORMAT_Y10 \
  87         { 'Y',  '1',  '0',  ' ', 0x00, 0x00, 0x10, 0x00, \
  88          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  89 #define UVC_GUID_FORMAT_Y12 \
  90         { 'Y',  '1',  '2',  ' ', 0x00, 0x00, 0x10, 0x00, \
  91          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  92 #define UVC_GUID_FORMAT_Y16 \
  93         { 'Y',  '1',  '6',  ' ', 0x00, 0x00, 0x10, 0x00, \
  94          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  95 #define UVC_GUID_FORMAT_BY8 \
  96         { 'B',  'Y',  '8',  ' ', 0x00, 0x00, 0x10, 0x00, \
  97          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  98 #define UVC_GUID_FORMAT_BA81 \
  99         { 'B',  'A',  '8',  '1', 0x00, 0x00, 0x10, 0x00, \
 100          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 101 #define UVC_GUID_FORMAT_GBRG \
 102         { 'G',  'B',  'R',  'G', 0x00, 0x00, 0x10, 0x00, \
 103          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 104 #define UVC_GUID_FORMAT_GRBG \
 105         { 'G',  'R',  'B',  'G', 0x00, 0x00, 0x10, 0x00, \
 106          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 107 #define UVC_GUID_FORMAT_RGGB \
 108         { 'R',  'G',  'G',  'B', 0x00, 0x00, 0x10, 0x00, \
 109          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 110 #define UVC_GUID_FORMAT_BG16 \
 111         { 'B',  'G',  '1',  '6', 0x00, 0x00, 0x10, 0x00, \
 112          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 113 #define UVC_GUID_FORMAT_GB16 \
 114         { 'G',  'B',  '1',  '6', 0x00, 0x00, 0x10, 0x00, \
 115          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 116 #define UVC_GUID_FORMAT_RG16 \
 117         { 'R',  'G',  '1',  '6', 0x00, 0x00, 0x10, 0x00, \
 118          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 119 #define UVC_GUID_FORMAT_GR16 \
 120         { 'G',  'R',  '1',  '6', 0x00, 0x00, 0x10, 0x00, \
 121          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 122 #define UVC_GUID_FORMAT_RGBP \
 123         { 'R',  'G',  'B',  'P', 0x00, 0x00, 0x10, 0x00, \
 124          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 125 #define UVC_GUID_FORMAT_BGR3 \
 126         { 0x7d, 0xeb, 0x36, 0xe4, 0x4f, 0x52, 0xce, 0x11, \
 127          0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}
 128 #define UVC_GUID_FORMAT_M420 \
 129         { 'M',  '4',  '2',  '0', 0x00, 0x00, 0x10, 0x00, \
 130          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 131
 132 #define UVC_GUID_FORMAT_H264 \
 133         { 'H',  '2',  '6',  '4', 0x00, 0x00, 0x10, 0x00, \
 134          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 135 #define UVC_GUID_FORMAT_Y8I \
 136         { 'Y',  '8',  'I',  ' ', 0x00, 0x00, 0x10, 0x00, \
 137          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 138 #define UVC_GUID_FORMAT_Y12I \
 139         { 'Y',  '1',  '2',  'I', 0x00, 0x00, 0x10, 0x00, \
 140          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 141 #define UVC_GUID_FORMAT_Z16 \
 142         { 'Z',  '1',  '6',  ' ', 0x00, 0x00, 0x10, 0x00, \
 143          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 144 #define UVC_GUID_FORMAT_RW10 \
 145         { 'R',  'W',  '1',  '0', 0x00, 0x00, 0x10, 0x00, \
 146          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 147 #define UVC_GUID_FORMAT_INVZ \
 148         { 'I',  'N',  'V',  'Z', 0x90, 0x2d, 0x58, 0x4a, \
 149          0x92, 0x0b, 0x77, 0x3f, 0x1f, 0x2c, 0x55, 0x6b}
 150 #define UVC_GUID_FORMAT_INZI \
 151         { 'I',  'N',  'Z',  'I', 0x66, 0x1a, 0x42, 0xa2, \
 152          0x90, 0x65, 0xd0, 0x18, 0x14, 0xa8, 0xef, 0x8a}
 153 #define UVC_GUID_FORMAT_INVI \
 154         { 'I',  'N',  'V',  'I', 0xdb, 0x57, 0x49, 0x5e, \
 155          0x8e, 0x3f, 0xf4, 0x79, 0x53, 0x2b, 0x94, 0x6f}
 156
 157 /* ------------------------------------------------------------------------
 158  * Driver specific constants.
 159  */
 160
 161 #define DRIVER_VERSION          "1.1.1"
 162
 163 /* Number of isochronous URBs. */
 164 #define UVC_URBS                5
 165 /* Maximum number of packets per URB. */
 166 #define UVC_MAX_PACKETS         32
 167 /* Maximum status buffer size in bytes of interrupt URB. */
 168 #define UVC_MAX_STATUS_SIZE     16
 169
 170 #define UVC_CTRL_CONTROL_TIMEOUT        500
 171 #define UVC_CTRL_STREAMING_TIMEOUT      5000
 172
 173 /* Maximum allowed number of control mappings per device */
 174 #define UVC_MAX_CONTROL_MAPPINGS        1024
 175 #define UVC_MAX_CONTROL_MENU_ENTRIES    32
 176
 177 /* Devices quirks */
 178 #define UVC_QUIRK_STATUS_INTERVAL       0x00000001
 179 #define UVC_QUIRK_PROBE_MINMAX          0x00000002
 180 #define UVC_QUIRK_PROBE_EXTRAFIELDS     0x00000004
 181 #define UVC_QUIRK_BUILTIN_ISIGHT        0x00000008
 182 #define UVC_QUIRK_STREAM_NO_FID         0x00000010
 183 #define UVC_QUIRK_IGNORE_SELECTOR_UNIT  0x00000020
 184 #define UVC_QUIRK_FIX_BANDWIDTH         0x00000080
 185 #define UVC_QUIRK_PROBE_DEF             0x00000100
 186 #define UVC_QUIRK_RESTRICT_FRAME_RATE   0x00000200
 187 #define UVC_QUIRK_RESTORE_CTRLS_ON_INIT 0x00000400
 188 #define UVC_QUIRK_FORCE_Y8              0x00000800
 189
 190 /* Format flags */
 191 #define UVC_FMT_FLAG_COMPRESSED         0x00000001
 192 #define UVC_FMT_FLAG_STREAM             0x00000002
 193
 194 /* ------------------------------------------------------------------------
 195  * Structures.
 196  */
 197
 198 struct uvc_device;
 199
 200 /* TODO: Put the most frequently accessed fields at the beginning of
 201  * structures to maximize cache efficiency.
 202  */
 203 struct uvc_control_info {
 204         struct list_head mappings;
 205
 206         __u8 entity[16];
 207         __u8 index;     /* Bit index in bmControls */
 208         __u8 selector;
 209
 210         __u16 size;
 211         __u32 flags;
 212 };
 213
 214 struct uvc_control_mapping {
 215         struct list_head list;
 216         struct list_head ev_subs;
 217
 218         __u32 id;
 219         __u8 name[32];
 220         __u8 entity[16];
 221         __u8 selector;
 222
 223         __u8 size;
 224         __u8 offset;
 225         enum v4l2_ctrl_type v4l2_type;
 226         __u32 data_type;
 227
 228         struct uvc_menu_info *menu_info;
 229         __u32 menu_count;
 230
 231         __u32 master_id;
 232         __s32 master_manual;
 233         __u32 slave_ids[2];
 234
 235         __s32 (*get) (struct uvc_control_mapping *mapping, __u8 query,
 236                       const __u8 *data);
 237         void (*set) (struct uvc_control_mapping *mapping, __s32 value,
 238                      __u8 *data);
 239 };
 240
 241 struct uvc_control {
 242         struct uvc_entity *entity;
 243         struct uvc_control_info info;
 244
 245         __u8 index;     /* Used to match the uvc_control entry with a
 246                            uvc_control_info. */
 247         __u8 dirty:1,
 248              loaded:1,
 249              modified:1,
 250              cached:1,
 251              initialized:1;
 252
 253         __u8 *uvc_data;
 254 };
 255
 256 struct uvc_format_desc {
 257         char *name;
 258         __u8 guid[16];
 259         __u32 fcc;
 260 };
 261
 262 /* The term 'entity' refers to both UVC units and UVC terminals.
 263  *
 264  * The type field is either the terminal type (wTerminalType in the terminal
 265  * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor).
 266  * As the bDescriptorSubtype field is one byte long, the type value will
 267  * always have a null MSB for units. All terminal types defined by the UVC
 268  * specification have a non-null MSB, so it is safe to use the MSB to
 269  * differentiate between units and terminals as long as the descriptor parsing
 270  * code makes sure terminal types have a non-null MSB.
 271  *
 272  * For terminals, the type's most significant bit stores the terminal
 273  * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should
 274  * always be accessed with the UVC_ENTITY_* macros and never directly.
 275  */
 276
 277 #define UVC_ENTITY_FLAG_DEFAULT         (1 << 0)
 278
 279 struct uvc_entity {
 280         struct list_head list;          /* Entity as part of a UVC device. */
 281         struct list_head chain;         /* Entity as part of a video device
 282                                          * chain. */
 283         unsigned int flags;
 284
 285         __u8 id;
 286         __u16 type;
 287         char name[64];
 288
 289         /* Media controller-related fields. */
 290         struct video_device *vdev;
 291         struct v4l2_subdev subdev;
 292         unsigned int num_pads;
 293         unsigned int num_links;
 294         struct media_pad *pads;
 295
 296         union {
 297                 struct {
 298                         __u16 wObjectiveFocalLengthMin;
 299                         __u16 wObjectiveFocalLengthMax;
 300                         __u16 wOcularFocalLength;
 301                         __u8  bControlSize;
 302                         __u8  *bmControls;
 303                 } camera;
 304
 305                 struct {
 306                         __u8  bControlSize;
 307                         __u8  *bmControls;
 308                         __u8  bTransportModeSize;
 309                         __u8  *bmTransportModes;
 310                 } media;
 311
 312                 struct {
 313                 } output;
 314
 315                 struct {
 316                         __u16 wMaxMultiplier;
 317                         __u8  bControlSize;
 318                         __u8  *bmControls;
 319                         __u8  bmVideoStandards;
 320                 } processing;
 321
 322                 struct {
 323                 } selector;
 324
 325                 struct {
 326                         __u8  guidExtensionCode[16];
 327                         __u8  bNumControls;
 328                         __u8  bControlSize;
 329                         __u8  *bmControls;
 330                         __u8  *bmControlsType;
 331                 } extension;
 332         };
 333
 334         __u8 bNrInPins;
 335         __u8 *baSourceID;
 336
 337         unsigned int ncontrols;
 338         struct uvc_control *controls;
 339 };
 340
 341 struct uvc_frame {
 342         __u8  bFrameIndex;
 343         __u8  bmCapabilities;
 344         __u16 wWidth;
 345         __u16 wHeight;
 346         __u32 dwMinBitRate;
 347         __u32 dwMaxBitRate;
 348         __u32 dwMaxVideoFrameBufferSize;
 349         __u8  bFrameIntervalType;
 350         __u32 dwDefaultFrameInterval;
 351         __u32 *dwFrameInterval;
 352 };
 353
 354 struct uvc_format {
 355         __u8 type;
 356         __u8 index;
 357         __u8 bpp;
 358         __u8 colorspace;
 359         __u32 fcc;
 360         __u32 flags;
 361
 362         char name[32];
 363
 364         unsigned int nframes;
 365         struct uvc_frame *frame;
 366 };
 367
 368 struct uvc_streaming_header {
 369         __u8 bNumFormats;
 370         __u8 bEndpointAddress;
 371         __u8 bTerminalLink;
 372         __u8 bControlSize;
 373         __u8 *bmaControls;
 374         /* The following fields are used by input headers only. */
 375         __u8 bmInfo;
 376         __u8 bStillCaptureMethod;
 377         __u8 bTriggerSupport;
 378         __u8 bTriggerUsage;
 379 };
 380
 381 enum uvc_buffer_state {
 382         UVC_BUF_STATE_IDLE      = 0,
 383         UVC_BUF_STATE_QUEUED    = 1,
 384         UVC_BUF_STATE_ACTIVE    = 2,
 385         UVC_BUF_STATE_READY     = 3,
 386         UVC_BUF_STATE_DONE      = 4,
 387         UVC_BUF_STATE_ERROR     = 5,
 388 };
 389
 390 struct uvc_buffer {
 391         struct vb2_v4l2_buffer buf;
 392         struct list_head queue;
 393
 394         enum uvc_buffer_state state;
 395         unsigned int error;
 396
 397         void *mem;
 398         unsigned int length;
 399         unsigned int bytesused;
 400
 401         u32 pts;
 402 };
 403
 404 #define UVC_QUEUE_DISCONNECTED          (1 << 0)
 405 #define UVC_QUEUE_DROP_CORRUPTED        (1 << 1)
 406
 407 struct uvc_video_queue {
 408         struct vb2_queue queue;
 409         struct mutex mutex;                     /* Protects queue */
 410
 411         unsigned int flags;
 412         unsigned int buf_used;
 413
 414         spinlock_t irqlock;                     /* Protects irqqueue */
 415         struct list_head irqqueue;
 416 };
 417
 418 struct uvc_video_chain {
 419         struct uvc_device *dev;
 420         struct list_head list;
 421
 422         struct list_head entities;              /* All entities */
 423         struct uvc_entity *processing;          /* Processing unit */
 424         struct uvc_entity *selector;            /* Selector unit */
 425
 426         struct mutex ctrl_mutex;                /* Protects ctrl.info */
 427
 428         struct v4l2_prio_state prio;            /* V4L2 priority state */
 429         u32 caps;                               /* V4L2 chain-wide caps */
 430 };
 431
 432 struct uvc_stats_frame {
 433         unsigned int size;              /* Number of bytes captured */
 434         unsigned int first_data;        /* Index of the first non-empty packet */
 435
 436         unsigned int nb_packets;        /* Number of packets */
 437         unsigned int nb_empty;          /* Number of empty packets */
 438         unsigned int nb_invalid;        /* Number of packets with an invalid header */
 439         unsigned int nb_errors;         /* Number of packets with the error bit set */
 440
 441         unsigned int nb_pts;            /* Number of packets with a PTS timestamp */
 442         unsigned int nb_pts_diffs;      /* Number of PTS differences inside a frame */
 443         unsigned int last_pts_diff;     /* Index of the last PTS difference */
 444         bool has_initial_pts;           /* Whether the first non-empty packet has a PTS */
 445         bool has_early_pts;             /* Whether a PTS is present before the first non-empty packet */
 446         u32 pts;                        /* PTS of the last packet */
 447
 448         unsigned int nb_scr;            /* Number of packets with a SCR timestamp */
 449         unsigned int nb_scr_diffs;      /* Number of SCR.STC differences inside a frame */
 450         u16 scr_sof;                    /* SCR.SOF of the last packet */
 451         u32 scr_stc;                    /* SCR.STC of the last packet */
 452 };
 453
 454 struct uvc_stats_stream {
 455         struct timespec start_ts;       /* Stream start timestamp */
 456         struct timespec stop_ts;        /* Stream stop timestamp */
 457
 458         unsigned int nb_frames;         /* Number of frames */
 459
 460         unsigned int nb_packets;        /* Number of packets */
 461         unsigned int nb_empty;          /* Number of empty packets */
 462         unsigned int nb_invalid;        /* Number of packets with an invalid header */
 463         unsigned int nb_errors;         /* Number of packets with the error bit set */
 464
 465         unsigned int nb_pts_constant;   /* Number of frames with constant PTS */
 466         unsigned int nb_pts_early;      /* Number of frames with early PTS */
 467         unsigned int nb_pts_initial;    /* Number of frames with initial PTS */
 468
 469         unsigned int nb_scr_count_ok;   /* Number of frames with at least one SCR per non empty packet */
 470         unsigned int nb_scr_diffs_ok;   /* Number of frames with varying SCR.STC */
 471         unsigned int scr_sof_count;     /* STC.SOF counter accumulated since stream start */
 472         unsigned int scr_sof;           /* STC.SOF of the last packet */
 473         unsigned int min_sof;           /* Minimum STC.SOF value */
 474         unsigned int max_sof;           /* Maximum STC.SOF value */
 475 };
 476
 477 struct uvc_streaming {
 478         struct list_head list;
 479         struct uvc_device *dev;
 480         struct video_device vdev;
 481         struct uvc_video_chain *chain;
 482         atomic_t active;
 483
 484         struct usb_interface *intf;
 485         int intfnum;
 486         __u16 maxpsize;
 487
 488         struct uvc_streaming_header header;
 489         enum v4l2_buf_type type;
 490
 491         unsigned int nformats;
 492         struct uvc_format *format;
 493
 494         struct uvc_streaming_control ctrl;
 495         struct uvc_format *def_format;
 496         struct uvc_format *cur_format;
 497         struct uvc_frame *cur_frame;
 498
 499         /* Protect access to ctrl, cur_format, cur_frame and hardware video
 500          * probe control.
 501          */
 502         struct mutex mutex;
 503
 504         /* Buffers queue. */
 505         unsigned int frozen : 1;
 506         struct uvc_video_queue queue;
 507         void (*decode) (struct urb *urb, struct uvc_streaming *video,
 508                         struct uvc_buffer *buf);
 509
 510         /* Context data used by the bulk completion handler. */
 511         struct {
 512                 __u8 header[256];
 513                 unsigned int header_size;
 514                 int skip_payload;
 515                 __u32 payload_size;
 516                 __u32 max_payload_size;
 517         } bulk;
 518
 519         struct urb *urb[UVC_URBS];
 520         char *urb_buffer[UVC_URBS];
 521         dma_addr_t urb_dma[UVC_URBS];
 522         unsigned int urb_size;
 523
 524         __u32 sequence;
 525         __u8 last_fid;
 526
 527         /* debugfs */
 528         struct dentry *debugfs_dir;
 529         struct {
 530                 struct uvc_stats_frame frame;
 531                 struct uvc_stats_stream stream;
 532         } stats;
 533
 534         /* Timestamps support. */
 535         struct uvc_clock {
 536                 struct uvc_clock_sample {
 537                         u32 dev_stc;
 538                         u16 dev_sof;
 539                         struct timespec host_ts;
 540                         u16 host_sof;
 541                 } *samples;
 542
 543                 unsigned int head;
 544                 unsigned int count;
 545                 unsigned int size;
 546
 547                 u16 last_sof;
 548                 u16 sof_offset;
 549
 550                 spinlock_t lock;
 551         } clock;
 552 };
 553
 554 struct uvc_device {
 555         struct usb_device *udev;
 556         struct usb_interface *intf;
 557         unsigned long warnings;
 558         __u32 quirks;
 559         int intfnum;
 560         char name[32];
 561
 562         struct mutex lock;              /* Protects users */
 563         unsigned int users;
 564         atomic_t nmappings;
 565
 566         /* Video control interface */
 567 #ifdef CONFIG_MEDIA_CONTROLLER
 568         struct media_device mdev;
 569 #endif
 570         struct v4l2_device vdev;
 571         __u16 uvc_version;
 572         __u32 clock_frequency;
 573
 574         struct list_head entities;
 575         struct list_head chains;
 576
 577         /* Video Streaming interfaces */
 578         struct list_head streams;
 579         struct kref ref;
 580
 581         /* Status Interrupt Endpoint */
 582         struct usb_host_endpoint *int_ep;
 583         struct urb *int_urb;
 584         __u8 *status;
 585         struct input_dev *input;
 586         char input_phys[64];
 587 };
 588
 589 enum uvc_handle_state {
 590         UVC_HANDLE_PASSIVE      = 0,
 591         UVC_HANDLE_ACTIVE       = 1,
 592 };
 593
 594 struct uvc_fh {
 595         struct v4l2_fh vfh;
 596         struct uvc_video_chain *chain;
 597         struct uvc_streaming *stream;
 598         enum uvc_handle_state state;
 599 };
 600
 601 struct uvc_driver {
 602         struct usb_driver driver;
 603 };
 604
 605 /* ------------------------------------------------------------------------
 606  * Debugging, printing and logging
 607  */
 608
 609 #define UVC_TRACE_PROBE         (1 << 0)
 610 #define UVC_TRACE_DESCR         (1 << 1)
 611 #define UVC_TRACE_CONTROL       (1 << 2)
 612 #define UVC_TRACE_FORMAT        (1 << 3)
 613 #define UVC_TRACE_CAPTURE       (1 << 4)
 614 #define UVC_TRACE_CALLS         (1 << 5)
 615 #define UVC_TRACE_FRAME         (1 << 7)
 616 #define UVC_TRACE_SUSPEND       (1 << 8)
 617 #define UVC_TRACE_STATUS        (1 << 9)
 618 #define UVC_TRACE_VIDEO         (1 << 10)
 619 #define UVC_TRACE_STATS         (1 << 11)
 620 #define UVC_TRACE_CLOCK         (1 << 12)
 621
 622 #define UVC_WARN_MINMAX         0
 623 #define UVC_WARN_PROBE_DEF      1
 624 #define UVC_WARN_XU_GET_RES     2
 625
 626 extern unsigned int uvc_clock_param;
 627 extern unsigned int uvc_no_drop_param;
 628 extern unsigned int uvc_trace_param;
 629 extern unsigned int uvc_timeout_param;
 630 extern unsigned int uvc_hw_timestamps_param;
 631
 632 #define uvc_trace(flag, msg...) \
 633         do { \
 634                 if (uvc_trace_param & flag) \
 635                         printk(KERN_DEBUG "uvcvideo: " msg); \
 636         } while (0)
 637
 638 #define uvc_warn_once(dev, warn, msg...) \
 639         do { \
 640                 if (!test_and_set_bit(warn, &dev->warnings)) \
 641                         printk(KERN_INFO "uvcvideo: " msg); \
 642         } while (0)
 643
 644 #define uvc_printk(level, msg...) \
 645         printk(level "uvcvideo: " msg)
 646
 647 /* --------------------------------------------------------------------------
 648  * Internal functions.
 649  */
 650
 651 /* Core driver */
 652 extern struct uvc_driver uvc_driver;
 653
 654 extern struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id);
 655
 656 /* Video buffers queue management. */
 657 extern int uvc_queue_init(struct uvc_video_queue *queue,
 658                 enum v4l2_buf_type type, int drop_corrupted);
 659 extern void uvc_queue_release(struct uvc_video_queue *queue);
 660 extern int uvc_request_buffers(struct uvc_video_queue *queue,
 661                 struct v4l2_requestbuffers *rb);
 662 extern int uvc_query_buffer(struct uvc_video_queue *queue,
 663                 struct v4l2_buffer *v4l2_buf);
 664 extern int uvc_create_buffers(struct uvc_video_queue *queue,
 665                 struct v4l2_create_buffers *v4l2_cb);
 666 extern int uvc_queue_buffer(struct uvc_video_queue *queue,
 667                 struct v4l2_buffer *v4l2_buf);
 668 extern int uvc_export_buffer(struct uvc_video_queue *queue,
 669                 struct v4l2_exportbuffer *exp);
 670 extern int uvc_dequeue_buffer(struct uvc_video_queue *queue,
 671                 struct v4l2_buffer *v4l2_buf, int nonblocking);
 672 extern int uvc_queue_streamon(struct uvc_video_queue *queue,
 673                               enum v4l2_buf_type type);
 674 extern int uvc_queue_streamoff(struct uvc_video_queue *queue,
 675                                enum v4l2_buf_type type);
 676 extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
 677 extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
 678                 struct uvc_buffer *buf);
 679 extern int uvc_queue_mmap(struct uvc_video_queue *queue,
 680                 struct vm_area_struct *vma);
 681 extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue,
 682                 struct file *file, poll_table *wait);
 683 #ifndef CONFIG_MMU
 684 extern unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
 685                 unsigned long pgoff);
 686 #endif
 687 extern int uvc_queue_allocated(struct uvc_video_queue *queue);
 688 static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
 689 {
 690         return vb2_is_streaming(&queue->queue);
 691 }
 692
 693 /* V4L2 interface */
 694 extern const struct v4l2_ioctl_ops uvc_ioctl_ops;
 695 extern const struct v4l2_file_operations uvc_fops;
 696
 697 /* Media controller */
 698 extern int uvc_mc_register_entities(struct uvc_video_chain *chain);
 699 extern void uvc_mc_cleanup_entity(struct uvc_entity *entity);
 700
 701 /* Video */
 702 extern int uvc_video_init(struct uvc_streaming *stream);
 703 extern int uvc_video_suspend(struct uvc_streaming *stream);
 704 extern int uvc_video_resume(struct uvc_streaming *stream, int reset);
 705 extern int uvc_video_enable(struct uvc_streaming *stream, int enable);
 706 extern int uvc_probe_video(struct uvc_streaming *stream,
 707                 struct uvc_streaming_control *probe);
 708 extern int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit,
 709                 __u8 intfnum, __u8 cs, void *data, __u16 size);
 710 void uvc_video_clock_update(struct uvc_streaming *stream,
 711                             struct vb2_v4l2_buffer *vbuf,
 712                             struct uvc_buffer *buf);
 713
 714 /* Status */
 715 extern int uvc_status_init(struct uvc_device *dev);
 716 extern void uvc_status_cleanup(struct uvc_device *dev);
 717 extern int uvc_status_start(struct uvc_device *dev, gfp_t flags);
 718 extern void uvc_status_stop(struct uvc_device *dev);
 719
 720 /* Controls */
 721 extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops;
 722
 723 extern int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
 724                 struct v4l2_queryctrl *v4l2_ctrl);
 725 extern int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
 726                 struct v4l2_querymenu *query_menu);
 727
 728 extern int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
 729                 const struct uvc_control_mapping *mapping);
 730 extern int uvc_ctrl_init_device(struct uvc_device *dev);
 731 extern void uvc_ctrl_cleanup_device(struct uvc_device *dev);
 732 extern int uvc_ctrl_restore_values(struct uvc_device *dev);
 733
 734 extern int uvc_ctrl_begin(struct uvc_video_chain *chain);
 735 extern int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback,
 736                         const struct v4l2_ext_control *xctrls,
 737                         unsigned int xctrls_count);
 738 static inline int uvc_ctrl_commit(struct uvc_fh *handle,
 739                         const struct v4l2_ext_control *xctrls,
 740                         unsigned int xctrls_count)
 741 {
 742         return __uvc_ctrl_commit(handle, 0, xctrls, xctrls_count);
 743 }
 744 static inline int uvc_ctrl_rollback(struct uvc_fh *handle)
 745 {
 746         return __uvc_ctrl_commit(handle, 1, NULL, 0);
 747 }
 748
 749 extern int uvc_ctrl_get(struct uvc_video_chain *chain,
 750                 struct v4l2_ext_control *xctrl);
 751 extern int uvc_ctrl_set(struct uvc_video_chain *chain,
 752                 struct v4l2_ext_control *xctrl);
 753
 754 extern int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
 755                 struct uvc_xu_control_query *xqry);
 756
 757 /* Utility functions */
 758 extern void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
 759                 unsigned int n_terms, unsigned int threshold);
 760 extern uint32_t uvc_fraction_to_interval(uint32_t numerator,
 761                 uint32_t denominator);
 762 extern struct usb_host_endpoint *uvc_find_endpoint(
 763                 struct usb_host_interface *alts, __u8 epaddr);
 764
 765 /* Quirks support */
 766 void uvc_video_decode_isight(struct urb *urb, struct uvc_streaming *stream,
 767                 struct uvc_buffer *buf);
 768
 769 /* debugfs and statistics */
 770 void uvc_debugfs_init(void);
 771 void uvc_debugfs_cleanup(void);
 772 void uvc_debugfs_init_stream(struct uvc_streaming *stream);
 773 void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream);
 774
 775 size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf,
 776                             size_t size);
 777
 778 #endif