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 #define UVC_GUID_FORMAT_D3DFMT_L8 \
 158         {0x32, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, \
 159          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 160
 161
 162 /* ------------------------------------------------------------------------
 163  * Driver specific constants.
 164  */
 165
 166 #define DRIVER_VERSION          "1.1.1"
 167
 168 /* Number of isochronous URBs. */
 169 #define UVC_URBS                5
 170 /* Maximum number of packets per URB. */
 171 #define UVC_MAX_PACKETS         32
 172 /* Maximum status buffer size in bytes of interrupt URB. */
 173 #define UVC_MAX_STATUS_SIZE     16
 174
 175 #define UVC_CTRL_CONTROL_TIMEOUT        500
 176 #define UVC_CTRL_STREAMING_TIMEOUT      5000
 177
 178 /* Maximum allowed number of control mappings per device */
 179 #define UVC_MAX_CONTROL_MAPPINGS        1024
 180 #define UVC_MAX_CONTROL_MENU_ENTRIES    32
 181
 182 /* Devices quirks */
 183 #define UVC_QUIRK_STATUS_INTERVAL       0x00000001
 184 #define UVC_QUIRK_PROBE_MINMAX          0x00000002
 185 #define UVC_QUIRK_PROBE_EXTRAFIELDS     0x00000004
 186 #define UVC_QUIRK_BUILTIN_ISIGHT        0x00000008
 187 #define UVC_QUIRK_STREAM_NO_FID         0x00000010
 188 #define UVC_QUIRK_IGNORE_SELECTOR_UNIT  0x00000020
 189 #define UVC_QUIRK_FIX_BANDWIDTH         0x00000080
 190 #define UVC_QUIRK_PROBE_DEF             0x00000100
 191 #define UVC_QUIRK_RESTRICT_FRAME_RATE   0x00000200
 192 #define UVC_QUIRK_RESTORE_CTRLS_ON_INIT 0x00000400
 193 #define UVC_QUIRK_FORCE_Y8              0x00000800
 194
 195 /* Format flags */
 196 #define UVC_FMT_FLAG_COMPRESSED         0x00000001
 197 #define UVC_FMT_FLAG_STREAM             0x00000002
 198
 199 /* ------------------------------------------------------------------------
 200  * Structures.
 201  */
 202
 203 struct uvc_device;
 204
 205 /* TODO: Put the most frequently accessed fields at the beginning of
 206  * structures to maximize cache efficiency.
 207  */
 208 struct uvc_control_info {
 209         struct list_head mappings;
 210
 211         __u8 entity[16];
 212         __u8 index;     /* Bit index in bmControls */
 213         __u8 selector;
 214
 215         __u16 size;
 216         __u32 flags;
 217 };
 218
 219 struct uvc_control_mapping {
 220         struct list_head list;
 221         struct list_head ev_subs;
 222
 223         __u32 id;
 224         __u8 name[32];
 225         __u8 entity[16];
 226         __u8 selector;
 227
 228         __u8 size;
 229         __u8 offset;
 230         enum v4l2_ctrl_type v4l2_type;
 231         __u32 data_type;
 232
 233         struct uvc_menu_info *menu_info;
 234         __u32 menu_count;
 235
 236         __u32 master_id;
 237         __s32 master_manual;
 238         __u32 slave_ids[2];
 239
 240         __s32 (*get) (struct uvc_control_mapping *mapping, __u8 query,
 241                       const __u8 *data);
 242         void (*set) (struct uvc_control_mapping *mapping, __s32 value,
 243                      __u8 *data);
 244 };
 245
 246 struct uvc_control {
 247         struct uvc_entity *entity;
 248         struct uvc_control_info info;
 249
 250         __u8 index;     /* Used to match the uvc_control entry with a
 251                            uvc_control_info. */
 252         __u8 dirty:1,
 253              loaded:1,
 254              modified:1,
 255              cached:1,
 256              initialized:1;
 257
 258         __u8 *uvc_data;
 259 };
 260
 261 struct uvc_format_desc {
 262         char *name;
 263         __u8 guid[16];
 264         __u32 fcc;
 265 };
 266
 267 /* The term 'entity' refers to both UVC units and UVC terminals.
 268  *
 269  * The type field is either the terminal type (wTerminalType in the terminal
 270  * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor).
 271  * As the bDescriptorSubtype field is one byte long, the type value will
 272  * always have a null MSB for units. All terminal types defined by the UVC
 273  * specification have a non-null MSB, so it is safe to use the MSB to
 274  * differentiate between units and terminals as long as the descriptor parsing
 275  * code makes sure terminal types have a non-null MSB.
 276  *
 277  * For terminals, the type's most significant bit stores the terminal
 278  * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should
 279  * always be accessed with the UVC_ENTITY_* macros and never directly.
 280  */
 281
 282 #define UVC_ENTITY_FLAG_DEFAULT         (1 << 0)
 283
 284 struct uvc_entity {
 285         struct list_head list;          /* Entity as part of a UVC device. */
 286         struct list_head chain;         /* Entity as part of a video device
 287                                          * chain. */
 288         unsigned int flags;
 289
 290         __u8 id;
 291         __u16 type;
 292         char name[64];
 293
 294         /* Media controller-related fields. */
 295         struct video_device *vdev;
 296         struct v4l2_subdev subdev;
 297         unsigned int num_pads;
 298         unsigned int num_links;
 299         struct media_pad *pads;
 300
 301         union {
 302                 struct {
 303                         __u16 wObjectiveFocalLengthMin;
 304                         __u16 wObjectiveFocalLengthMax;
 305                         __u16 wOcularFocalLength;
 306                         __u8  bControlSize;
 307                         __u8  *bmControls;
 308                 } camera;
 309
 310                 struct {
 311                         __u8  bControlSize;
 312                         __u8  *bmControls;
 313                         __u8  bTransportModeSize;
 314                         __u8  *bmTransportModes;
 315                 } media;
 316
 317                 struct {
 318                 } output;
 319
 320                 struct {
 321                         __u16 wMaxMultiplier;
 322                         __u8  bControlSize;
 323                         __u8  *bmControls;
 324                         __u8  bmVideoStandards;
 325                 } processing;
 326
 327                 struct {
 328                 } selector;
 329
 330                 struct {
 331                         __u8  guidExtensionCode[16];
 332                         __u8  bNumControls;
 333                         __u8  bControlSize;
 334                         __u8  *bmControls;
 335                         __u8  *bmControlsType;
 336                 } extension;
 337         };
 338
 339         __u8 bNrInPins;
 340         __u8 *baSourceID;
 341
 342         unsigned int ncontrols;
 343         struct uvc_control *controls;
 344 };
 345
 346 struct uvc_frame {
 347         __u8  bFrameIndex;
 348         __u8  bmCapabilities;
 349         __u16 wWidth;
 350         __u16 wHeight;
 351         __u32 dwMinBitRate;
 352         __u32 dwMaxBitRate;
 353         __u32 dwMaxVideoFrameBufferSize;
 354         __u8  bFrameIntervalType;
 355         __u32 dwDefaultFrameInterval;
 356         __u32 *dwFrameInterval;
 357 };
 358
 359 struct uvc_format {
 360         __u8 type;
 361         __u8 index;
 362         __u8 bpp;
 363         __u8 colorspace;
 364         __u32 fcc;
 365         __u32 flags;
 366
 367         char name[32];
 368
 369         unsigned int nframes;
 370         struct uvc_frame *frame;
 371 };
 372
 373 struct uvc_streaming_header {
 374         __u8 bNumFormats;
 375         __u8 bEndpointAddress;
 376         __u8 bTerminalLink;
 377         __u8 bControlSize;
 378         __u8 *bmaControls;
 379         /* The following fields are used by input headers only. */
 380         __u8 bmInfo;
 381         __u8 bStillCaptureMethod;
 382         __u8 bTriggerSupport;
 383         __u8 bTriggerUsage;
 384 };
 385
 386 enum uvc_buffer_state {
 387         UVC_BUF_STATE_IDLE      = 0,
 388         UVC_BUF_STATE_QUEUED    = 1,
 389         UVC_BUF_STATE_ACTIVE    = 2,
 390         UVC_BUF_STATE_READY     = 3,
 391         UVC_BUF_STATE_DONE      = 4,
 392         UVC_BUF_STATE_ERROR     = 5,
 393 };
 394
 395 struct uvc_buffer {
 396         struct vb2_v4l2_buffer buf;
 397         struct list_head queue;
 398
 399         enum uvc_buffer_state state;
 400         unsigned int error;
 401
 402         void *mem;
 403         unsigned int length;
 404         unsigned int bytesused;
 405
 406         u32 pts;
 407 };
 408
 409 #define UVC_QUEUE_DISCONNECTED          (1 << 0)
 410 #define UVC_QUEUE_DROP_CORRUPTED        (1 << 1)
 411
 412 struct uvc_video_queue {
 413         struct vb2_queue queue;
 414         struct mutex mutex;                     /* Protects queue */
 415
 416         unsigned int flags;
 417         unsigned int buf_used;
 418
 419         spinlock_t irqlock;                     /* Protects irqqueue */
 420         struct list_head irqqueue;
 421 };
 422
 423 struct uvc_video_chain {
 424         struct uvc_device *dev;
 425         struct list_head list;
 426
 427         struct list_head entities;              /* All entities */
 428         struct uvc_entity *processing;          /* Processing unit */
 429         struct uvc_entity *selector;            /* Selector unit */
 430
 431         struct mutex ctrl_mutex;                /* Protects ctrl.info */
 432
 433         struct v4l2_prio_state prio;            /* V4L2 priority state */
 434         u32 caps;                               /* V4L2 chain-wide caps */
 435 };
 436
 437 struct uvc_stats_frame {
 438         unsigned int size;              /* Number of bytes captured */
 439         unsigned int first_data;        /* Index of the first non-empty packet */
 440
 441         unsigned int nb_packets;        /* Number of packets */
 442         unsigned int nb_empty;          /* Number of empty packets */
 443         unsigned int nb_invalid;        /* Number of packets with an invalid header */
 444         unsigned int nb_errors;         /* Number of packets with the error bit set */
 445
 446         unsigned int nb_pts;            /* Number of packets with a PTS timestamp */
 447         unsigned int nb_pts_diffs;      /* Number of PTS differences inside a frame */
 448         unsigned int last_pts_diff;     /* Index of the last PTS difference */
 449         bool has_initial_pts;           /* Whether the first non-empty packet has a PTS */
 450         bool has_early_pts;             /* Whether a PTS is present before the first non-empty packet */
 451         u32 pts;                        /* PTS of the last packet */
 452
 453         unsigned int nb_scr;            /* Number of packets with a SCR timestamp */
 454         unsigned int nb_scr_diffs;      /* Number of SCR.STC differences inside a frame */
 455         u16 scr_sof;                    /* SCR.SOF of the last packet */
 456         u32 scr_stc;                    /* SCR.STC of the last packet */
 457 };
 458
 459 struct uvc_stats_stream {
 460         ktime_t start_ts;               /* Stream start timestamp */
 461         ktime_t stop_ts;                /* Stream stop timestamp */
 462
 463         unsigned int nb_frames;         /* Number of frames */
 464
 465         unsigned int nb_packets;        /* Number of packets */
 466         unsigned int nb_empty;          /* Number of empty packets */
 467         unsigned int nb_invalid;        /* Number of packets with an invalid header */
 468         unsigned int nb_errors;         /* Number of packets with the error bit set */
 469
 470         unsigned int nb_pts_constant;   /* Number of frames with constant PTS */
 471         unsigned int nb_pts_early;      /* Number of frames with early PTS */
 472         unsigned int nb_pts_initial;    /* Number of frames with initial PTS */
 473
 474         unsigned int nb_scr_count_ok;   /* Number of frames with at least one SCR per non empty packet */
 475         unsigned int nb_scr_diffs_ok;   /* Number of frames with varying SCR.STC */
 476         unsigned int scr_sof_count;     /* STC.SOF counter accumulated since stream start */
 477         unsigned int scr_sof;           /* STC.SOF of the last packet */
 478         unsigned int min_sof;           /* Minimum STC.SOF value */
 479         unsigned int max_sof;           /* Maximum STC.SOF value */
 480 };
 481
 482 #define UVC_METATADA_BUF_SIZE 1024
 483
 484 struct uvc_streaming {
 485         struct list_head list;
 486         struct uvc_device *dev;
 487         struct video_device vdev;
 488         struct uvc_video_chain *chain;
 489         atomic_t active;
 490
 491         struct usb_interface *intf;
 492         int intfnum;
 493         __u16 maxpsize;
 494
 495         struct uvc_streaming_header header;
 496         enum v4l2_buf_type type;
 497
 498         unsigned int nformats;
 499         struct uvc_format *format;
 500
 501         struct uvc_streaming_control ctrl;
 502         struct uvc_format *def_format;
 503         struct uvc_format *cur_format;
 504         struct uvc_frame *cur_frame;
 505
 506         /* Protect access to ctrl, cur_format, cur_frame and hardware video
 507          * probe control.
 508          */
 509         struct mutex mutex;
 510
 511         /* Buffers queue. */
 512         unsigned int frozen : 1;
 513         struct uvc_video_queue queue;
 514         void (*decode) (struct urb *urb, struct uvc_streaming *video,
 515                         struct uvc_buffer *buf, struct uvc_buffer *meta_buf);
 516
 517         struct {
 518                 struct video_device vdev;
 519                 struct uvc_video_queue queue;
 520                 __u32 format;
 521         } meta;
 522
 523         /* Context data used by the bulk completion handler. */
 524         struct {
 525                 __u8 header[256];
 526                 unsigned int header_size;
 527                 int skip_payload;
 528                 __u32 payload_size;
 529                 __u32 max_payload_size;
 530         } bulk;
 531
 532         struct urb *urb[UVC_URBS];
 533         char *urb_buffer[UVC_URBS];
 534         dma_addr_t urb_dma[UVC_URBS];
 535         unsigned int urb_size;
 536
 537         __u32 sequence;
 538         __u8 last_fid;
 539
 540         /* debugfs */
 541         struct dentry *debugfs_dir;
 542         struct {
 543                 struct uvc_stats_frame frame;
 544                 struct uvc_stats_stream stream;
 545         } stats;
 546
 547         /* Timestamps support. */
 548         struct uvc_clock {
 549                 struct uvc_clock_sample {
 550                         u32 dev_stc;
 551                         u16 dev_sof;
 552                         u16 host_sof;
 553                         ktime_t host_time;
 554                 } *samples;
 555
 556                 unsigned int head;
 557                 unsigned int count;
 558                 unsigned int size;
 559
 560                 u16 last_sof;
 561                 u16 sof_offset;
 562
 563                 u8 last_scr[6];
 564
 565                 spinlock_t lock;
 566         } clock;
 567 };
 568
 569 struct uvc_device {
 570         struct usb_device *udev;
 571         struct usb_interface *intf;
 572         unsigned long warnings;
 573         __u32 quirks;
 574         __u32 meta_format;
 575         int intfnum;
 576         char name[32];
 577
 578         struct mutex lock;              /* Protects users */
 579         unsigned int users;
 580         atomic_t nmappings;
 581
 582         /* Video control interface */
 583 #ifdef CONFIG_MEDIA_CONTROLLER
 584         struct media_device mdev;
 585 #endif
 586         struct v4l2_device vdev;
 587         __u16 uvc_version;
 588         __u32 clock_frequency;
 589
 590         struct list_head entities;
 591         struct list_head chains;
 592
 593         /* Video Streaming interfaces */
 594         struct list_head streams;
 595         struct kref ref;
 596
 597         /* Status Interrupt Endpoint */
 598         struct usb_host_endpoint *int_ep;
 599         struct urb *int_urb;
 600         __u8 *status;
 601         struct input_dev *input;
 602         char input_phys[64];
 603 };
 604
 605 enum uvc_handle_state {
 606         UVC_HANDLE_PASSIVE      = 0,
 607         UVC_HANDLE_ACTIVE       = 1,
 608 };
 609
 610 struct uvc_fh {
 611         struct v4l2_fh vfh;
 612         struct uvc_video_chain *chain;
 613         struct uvc_streaming *stream;
 614         enum uvc_handle_state state;
 615 };
 616
 617 struct uvc_driver {
 618         struct usb_driver driver;
 619 };
 620
 621 /* ------------------------------------------------------------------------
 622  * Debugging, printing and logging
 623  */
 624
 625 #define UVC_TRACE_PROBE         (1 << 0)
 626 #define UVC_TRACE_DESCR         (1 << 1)
 627 #define UVC_TRACE_CONTROL       (1 << 2)
 628 #define UVC_TRACE_FORMAT        (1 << 3)
 629 #define UVC_TRACE_CAPTURE       (1 << 4)
 630 #define UVC_TRACE_CALLS         (1 << 5)
 631 #define UVC_TRACE_FRAME         (1 << 7)
 632 #define UVC_TRACE_SUSPEND       (1 << 8)
 633 #define UVC_TRACE_STATUS        (1 << 9)
 634 #define UVC_TRACE_VIDEO         (1 << 10)
 635 #define UVC_TRACE_STATS         (1 << 11)
 636 #define UVC_TRACE_CLOCK         (1 << 12)
 637
 638 #define UVC_WARN_MINMAX         0
 639 #define UVC_WARN_PROBE_DEF      1
 640 #define UVC_WARN_XU_GET_RES     2
 641
 642 extern unsigned int uvc_clock_param;
 643 extern unsigned int uvc_no_drop_param;
 644 extern unsigned int uvc_trace_param;
 645 extern unsigned int uvc_timeout_param;
 646 extern unsigned int uvc_hw_timestamps_param;
 647
 648 #define uvc_trace(flag, msg...) \
 649         do { \
 650                 if (uvc_trace_param & flag) \
 651                         printk(KERN_DEBUG "uvcvideo: " msg); \
 652         } while (0)
 653
 654 #define uvc_warn_once(dev, warn, msg...) \
 655         do { \
 656                 if (!test_and_set_bit(warn, &dev->warnings)) \
 657                         printk(KERN_INFO "uvcvideo: " msg); \
 658         } while (0)
 659
 660 #define uvc_printk(level, msg...) \
 661         printk(level "uvcvideo: " msg)
 662
 663 /* --------------------------------------------------------------------------
 664  * Internal functions.
 665  */
 666
 667 /* Core driver */
 668 extern struct uvc_driver uvc_driver;
 669
 670 extern struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id);
 671
 672 /* Video buffers queue management. */
 673 extern int uvc_queue_init(struct uvc_video_queue *queue,
 674                 enum v4l2_buf_type type, int drop_corrupted);
 675 extern void uvc_queue_release(struct uvc_video_queue *queue);
 676 extern int uvc_request_buffers(struct uvc_video_queue *queue,
 677                 struct v4l2_requestbuffers *rb);
 678 extern int uvc_query_buffer(struct uvc_video_queue *queue,
 679                 struct v4l2_buffer *v4l2_buf);
 680 extern int uvc_create_buffers(struct uvc_video_queue *queue,
 681                 struct v4l2_create_buffers *v4l2_cb);
 682 extern int uvc_queue_buffer(struct uvc_video_queue *queue,
 683                 struct v4l2_buffer *v4l2_buf);
 684 extern int uvc_export_buffer(struct uvc_video_queue *queue,
 685                 struct v4l2_exportbuffer *exp);
 686 extern int uvc_dequeue_buffer(struct uvc_video_queue *queue,
 687                 struct v4l2_buffer *v4l2_buf, int nonblocking);
 688 extern int uvc_queue_streamon(struct uvc_video_queue *queue,
 689                               enum v4l2_buf_type type);
 690 extern int uvc_queue_streamoff(struct uvc_video_queue *queue,
 691                                enum v4l2_buf_type type);
 692 extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
 693 extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
 694                 struct uvc_buffer *buf);
 695 extern int uvc_queue_mmap(struct uvc_video_queue *queue,
 696                 struct vm_area_struct *vma);
 697 extern __poll_t uvc_queue_poll(struct uvc_video_queue *queue,
 698                 struct file *file, poll_table *wait);
 699 #ifndef CONFIG_MMU
 700 extern unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
 701                 unsigned long pgoff);
 702 #endif
 703 extern int uvc_queue_allocated(struct uvc_video_queue *queue);
 704 static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
 705 {
 706         return vb2_is_streaming(&queue->queue);
 707 }
 708
 709 /* V4L2 interface */
 710 extern const struct v4l2_ioctl_ops uvc_ioctl_ops;
 711 extern const struct v4l2_file_operations uvc_fops;
 712
 713 /* Media controller */
 714 extern int uvc_mc_register_entities(struct uvc_video_chain *chain);
 715 extern void uvc_mc_cleanup_entity(struct uvc_entity *entity);
 716
 717 /* Video */
 718 extern int uvc_video_init(struct uvc_streaming *stream);
 719 extern int uvc_video_suspend(struct uvc_streaming *stream);
 720 extern int uvc_video_resume(struct uvc_streaming *stream, int reset);
 721 extern int uvc_video_enable(struct uvc_streaming *stream, int enable);
 722 extern int uvc_probe_video(struct uvc_streaming *stream,
 723                 struct uvc_streaming_control *probe);
 724 extern int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit,
 725                 __u8 intfnum, __u8 cs, void *data, __u16 size);
 726 void uvc_video_clock_update(struct uvc_streaming *stream,
 727                             struct vb2_v4l2_buffer *vbuf,
 728                             struct uvc_buffer *buf);
 729 int uvc_meta_register(struct uvc_streaming *stream);
 730
 731 int uvc_register_video_device(struct uvc_device *dev,
 732                               struct uvc_streaming *stream,
 733                               struct video_device *vdev,
 734                               struct uvc_video_queue *queue,
 735                               enum v4l2_buf_type type,
 736                               const struct v4l2_file_operations *fops,
 737                               const struct v4l2_ioctl_ops *ioctl_ops);
 738
 739 /* Status */
 740 extern int uvc_status_init(struct uvc_device *dev);
 741 extern void uvc_status_cleanup(struct uvc_device *dev);
 742 extern int uvc_status_start(struct uvc_device *dev, gfp_t flags);
 743 extern void uvc_status_stop(struct uvc_device *dev);
 744
 745 /* Controls */
 746 extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops;
 747
 748 extern int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
 749                 struct v4l2_queryctrl *v4l2_ctrl);
 750 extern int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
 751                 struct v4l2_querymenu *query_menu);
 752
 753 extern int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
 754                 const struct uvc_control_mapping *mapping);
 755 extern int uvc_ctrl_init_device(struct uvc_device *dev);
 756 extern void uvc_ctrl_cleanup_device(struct uvc_device *dev);
 757 extern int uvc_ctrl_restore_values(struct uvc_device *dev);
 758
 759 extern int uvc_ctrl_begin(struct uvc_video_chain *chain);
 760 extern int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback,
 761                         const struct v4l2_ext_control *xctrls,
 762                         unsigned int xctrls_count);
 763 static inline int uvc_ctrl_commit(struct uvc_fh *handle,
 764                         const struct v4l2_ext_control *xctrls,
 765                         unsigned int xctrls_count)
 766 {
 767         return __uvc_ctrl_commit(handle, 0, xctrls, xctrls_count);
 768 }
 769 static inline int uvc_ctrl_rollback(struct uvc_fh *handle)
 770 {
 771         return __uvc_ctrl_commit(handle, 1, NULL, 0);
 772 }
 773
 774 extern int uvc_ctrl_get(struct uvc_video_chain *chain,
 775                 struct v4l2_ext_control *xctrl);
 776 extern int uvc_ctrl_set(struct uvc_video_chain *chain,
 777                 struct v4l2_ext_control *xctrl);
 778
 779 extern int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
 780                 struct uvc_xu_control_query *xqry);
 781
 782 /* Utility functions */
 783 extern void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
 784                 unsigned int n_terms, unsigned int threshold);
 785 extern uint32_t uvc_fraction_to_interval(uint32_t numerator,
 786                 uint32_t denominator);
 787 extern struct usb_host_endpoint *uvc_find_endpoint(
 788                 struct usb_host_interface *alts, __u8 epaddr);
 789
 790 /* Quirks support */
 791 void uvc_video_decode_isight(struct urb *urb, struct uvc_streaming *stream,
 792                 struct uvc_buffer *buf, struct uvc_buffer *meta_buf);
 793
 794 /* debugfs and statistics */
 795 void uvc_debugfs_init(void);
 796 void uvc_debugfs_cleanup(void);
 797 void uvc_debugfs_init_stream(struct uvc_streaming *stream);
 798 void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream);
 799
 800 size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf,
 801                             size_t size);
 802
 803 #endif