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 <linux/workqueue.h>
  16 #include <media/media-device.h>
  17 #include <media/v4l2-device.h>
  18 #include <media/v4l2-event.h>
  19 #include <media/v4l2-fh.h>
  20 #include <media/videobuf2-v4l2.h>
  21
  22 /* --------------------------------------------------------------------------
  23  * UVC constants
  24  */
  25
  26 #define UVC_TERM_INPUT                  0x0000
  27 #define UVC_TERM_OUTPUT                 0x8000
  28 #define UVC_TERM_DIRECTION(term)        ((term)->type & 0x8000)
  29
  30 #define UVC_ENTITY_TYPE(entity)         ((entity)->type & 0x7fff)
  31 #define UVC_ENTITY_IS_UNIT(entity)      (((entity)->type & 0xff00) == 0)
  32 #define UVC_ENTITY_IS_TERM(entity)      (((entity)->type & 0xff00) != 0)
  33 #define UVC_ENTITY_IS_ITERM(entity) \
  34         (UVC_ENTITY_IS_TERM(entity) && \
  35         ((entity)->type & 0x8000) == UVC_TERM_INPUT)
  36 #define UVC_ENTITY_IS_OTERM(entity) \
  37         (UVC_ENTITY_IS_TERM(entity) && \
  38         ((entity)->type & 0x8000) == UVC_TERM_OUTPUT)
  39
  40
  41 /* ------------------------------------------------------------------------
  42  * GUIDs
  43  */
  44 #define UVC_GUID_UVC_CAMERA \
  45         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  46          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}
  47 #define UVC_GUID_UVC_OUTPUT \
  48         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  49          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}
  50 #define UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT \
  51         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  52          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03}
  53 #define UVC_GUID_UVC_PROCESSING \
  54         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  55          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01}
  56 #define UVC_GUID_UVC_SELECTOR \
  57         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
  58          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02}
  59
  60 #define UVC_GUID_FORMAT_MJPEG \
  61         { 'M',  'J',  'P',  'G', 0x00, 0x00, 0x10, 0x00, \
  62          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  63 #define UVC_GUID_FORMAT_YUY2 \
  64         { 'Y',  'U',  'Y',  '2', 0x00, 0x00, 0x10, 0x00, \
  65          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  66 #define UVC_GUID_FORMAT_YUY2_ISIGHT \
  67         { 'Y',  'U',  'Y',  '2', 0x00, 0x00, 0x10, 0x00, \
  68          0x80, 0x00, 0x00, 0x00, 0x00, 0x38, 0x9b, 0x71}
  69 #define UVC_GUID_FORMAT_NV12 \
  70         { 'N',  'V',  '1',  '2', 0x00, 0x00, 0x10, 0x00, \
  71          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  72 #define UVC_GUID_FORMAT_YV12 \
  73         { 'Y',  'V',  '1',  '2', 0x00, 0x00, 0x10, 0x00, \
  74          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  75 #define UVC_GUID_FORMAT_I420 \
  76         { 'I',  '4',  '2',  '0', 0x00, 0x00, 0x10, 0x00, \
  77          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  78 #define UVC_GUID_FORMAT_UYVY \
  79         { 'U',  'Y',  'V',  'Y', 0x00, 0x00, 0x10, 0x00, \
  80          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  81 #define UVC_GUID_FORMAT_Y800 \
  82         { 'Y',  '8',  '0',  '0', 0x00, 0x00, 0x10, 0x00, \
  83          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  84 #define UVC_GUID_FORMAT_Y8 \
  85         { 'Y',  '8',  ' ',  ' ', 0x00, 0x00, 0x10, 0x00, \
  86          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  87 #define UVC_GUID_FORMAT_Y10 \
  88         { 'Y',  '1',  '0',  ' ', 0x00, 0x00, 0x10, 0x00, \
  89          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  90 #define UVC_GUID_FORMAT_Y12 \
  91         { 'Y',  '1',  '2',  ' ', 0x00, 0x00, 0x10, 0x00, \
  92          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  93 #define UVC_GUID_FORMAT_Y16 \
  94         { 'Y',  '1',  '6',  ' ', 0x00, 0x00, 0x10, 0x00, \
  95          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  96 #define UVC_GUID_FORMAT_BY8 \
  97         { 'B',  'Y',  '8',  ' ', 0x00, 0x00, 0x10, 0x00, \
  98          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
  99 #define UVC_GUID_FORMAT_BA81 \
 100         { 'B',  'A',  '8',  '1', 0x00, 0x00, 0x10, 0x00, \
 101          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 102 #define UVC_GUID_FORMAT_GBRG \
 103         { 'G',  'B',  'R',  'G', 0x00, 0x00, 0x10, 0x00, \
 104          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 105 #define UVC_GUID_FORMAT_GRBG \
 106         { 'G',  'R',  'B',  'G', 0x00, 0x00, 0x10, 0x00, \
 107          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 108 #define UVC_GUID_FORMAT_RGGB \
 109         { 'R',  'G',  'G',  'B', 0x00, 0x00, 0x10, 0x00, \
 110          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 111 #define UVC_GUID_FORMAT_BG16 \
 112         { 'B',  'G',  '1',  '6', 0x00, 0x00, 0x10, 0x00, \
 113          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 114 #define UVC_GUID_FORMAT_GB16 \
 115         { 'G',  'B',  '1',  '6', 0x00, 0x00, 0x10, 0x00, \
 116          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 117 #define UVC_GUID_FORMAT_RG16 \
 118         { 'R',  'G',  '1',  '6', 0x00, 0x00, 0x10, 0x00, \
 119          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 120 #define UVC_GUID_FORMAT_GR16 \
 121         { 'G',  'R',  '1',  '6', 0x00, 0x00, 0x10, 0x00, \
 122          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 123 #define UVC_GUID_FORMAT_RGBP \
 124         { 'R',  'G',  'B',  'P', 0x00, 0x00, 0x10, 0x00, \
 125          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 126 #define UVC_GUID_FORMAT_BGR3 \
 127         { 0x7d, 0xeb, 0x36, 0xe4, 0x4f, 0x52, 0xce, 0x11, \
 128          0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}
 129 #define UVC_GUID_FORMAT_M420 \
 130         { 'M',  '4',  '2',  '0', 0x00, 0x00, 0x10, 0x00, \
 131          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 132
 133 #define UVC_GUID_FORMAT_H264 \
 134         { 'H',  '2',  '6',  '4', 0x00, 0x00, 0x10, 0x00, \
 135          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 136 #define UVC_GUID_FORMAT_Y8I \
 137         { 'Y',  '8',  'I',  ' ', 0x00, 0x00, 0x10, 0x00, \
 138          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 139 #define UVC_GUID_FORMAT_Y12I \
 140         { 'Y',  '1',  '2',  'I', 0x00, 0x00, 0x10, 0x00, \
 141          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 142 #define UVC_GUID_FORMAT_Z16 \
 143         { 'Z',  '1',  '6',  ' ', 0x00, 0x00, 0x10, 0x00, \
 144          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 145 #define UVC_GUID_FORMAT_RW10 \
 146         { 'R',  'W',  '1',  '0', 0x00, 0x00, 0x10, 0x00, \
 147          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 148 #define UVC_GUID_FORMAT_INVZ \
 149         { 'I',  'N',  'V',  'Z', 0x90, 0x2d, 0x58, 0x4a, \
 150          0x92, 0x0b, 0x77, 0x3f, 0x1f, 0x2c, 0x55, 0x6b}
 151 #define UVC_GUID_FORMAT_INZI \
 152         { 'I',  'N',  'Z',  'I', 0x66, 0x1a, 0x42, 0xa2, \
 153          0x90, 0x65, 0xd0, 0x18, 0x14, 0xa8, 0xef, 0x8a}
 154 #define UVC_GUID_FORMAT_INVI \
 155         { 'I',  'N',  'V',  'I', 0xdb, 0x57, 0x49, 0x5e, \
 156          0x8e, 0x3f, 0xf4, 0x79, 0x53, 0x2b, 0x94, 0x6f}
 157 #define UVC_GUID_FORMAT_CNF4 \
 158         { 'C',  ' ',  ' ',  ' ', 0x00, 0x00, 0x10, 0x00, \
 159          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 160
 161 #define UVC_GUID_FORMAT_D3DFMT_L8 \
 162         {0x32, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, \
 163          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 164 #define UVC_GUID_FORMAT_KSMEDIA_L8_IR \
 165         {0x32, 0x00, 0x00, 0x00, 0x02, 0x00, 0x10, 0x00, \
 166          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 167
 168 #define UVC_GUID_FORMAT_HEVC \
 169         { 'H',  'E',  'V',  'C', 0x00, 0x00, 0x10, 0x00, \
 170          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 171
 172
 173 /* ------------------------------------------------------------------------
 174  * Driver specific constants.
 175  */
 176
 177 #define DRIVER_VERSION          "1.1.1"
 178
 179 /* Number of isochronous URBs. */
 180 #define UVC_URBS                5
 181 /* Maximum number of packets per URB. */
 182 #define UVC_MAX_PACKETS         32
 183 /* Maximum status buffer size in bytes of interrupt URB. */
 184 #define UVC_MAX_STATUS_SIZE     16
 185
 186 #define UVC_CTRL_CONTROL_TIMEOUT        500
 187 #define UVC_CTRL_STREAMING_TIMEOUT      5000
 188
 189 /* Maximum allowed number of control mappings per device */
 190 #define UVC_MAX_CONTROL_MAPPINGS        1024
 191 #define UVC_MAX_CONTROL_MENU_ENTRIES    32
 192
 193 /* Devices quirks */
 194 #define UVC_QUIRK_STATUS_INTERVAL       0x00000001
 195 #define UVC_QUIRK_PROBE_MINMAX          0x00000002
 196 #define UVC_QUIRK_PROBE_EXTRAFIELDS     0x00000004
 197 #define UVC_QUIRK_BUILTIN_ISIGHT        0x00000008
 198 #define UVC_QUIRK_STREAM_NO_FID         0x00000010
 199 #define UVC_QUIRK_IGNORE_SELECTOR_UNIT  0x00000020
 200 #define UVC_QUIRK_FIX_BANDWIDTH         0x00000080
 201 #define UVC_QUIRK_PROBE_DEF             0x00000100
 202 #define UVC_QUIRK_RESTRICT_FRAME_RATE   0x00000200
 203 #define UVC_QUIRK_RESTORE_CTRLS_ON_INIT 0x00000400
 204 #define UVC_QUIRK_FORCE_Y8              0x00000800
 205 #define UVC_QUIRK_FORCE_BPP             0x00001000
 206
 207 /* Format flags */
 208 #define UVC_FMT_FLAG_COMPRESSED         0x00000001
 209 #define UVC_FMT_FLAG_STREAM             0x00000002
 210
 211 /* ------------------------------------------------------------------------
 212  * Structures.
 213  */
 214
 215 struct uvc_device;
 216
 217 /* TODO: Put the most frequently accessed fields at the beginning of
 218  * structures to maximize cache efficiency.
 219  */
 220 struct uvc_control_info {
 221         struct list_head mappings;
 222
 223         u8 entity[16];
 224         u8 index;       /* Bit index in bmControls */
 225         u8 selector;
 226
 227         u16 size;
 228         u32 flags;
 229 };
 230
 231 struct uvc_control_mapping {
 232         struct list_head list;
 233         struct list_head ev_subs;
 234
 235         u32 id;
 236         u8 name[32];
 237         u8 entity[16];
 238         u8 selector;
 239
 240         u8 size;
 241         u8 offset;
 242         enum v4l2_ctrl_type v4l2_type;
 243         u32 data_type;
 244
 245         const struct uvc_menu_info *menu_info;
 246         u32 menu_count;
 247
 248         u32 master_id;
 249         s32 master_manual;
 250         u32 slave_ids[2];
 251
 252         s32 (*get)(struct uvc_control_mapping *mapping, u8 query,
 253                    const u8 *data);
 254         void (*set)(struct uvc_control_mapping *mapping, s32 value,
 255                     u8 *data);
 256 };
 257
 258 struct uvc_control {
 259         struct uvc_entity *entity;
 260         struct uvc_control_info info;
 261
 262         u8 index;       /* Used to match the uvc_control entry with a
 263                            uvc_control_info. */
 264         u8 dirty:1,
 265            loaded:1,
 266            modified:1,
 267            cached:1,
 268            initialized:1;
 269
 270         u8 *uvc_data;
 271
 272         struct uvc_fh *handle;  /* File handle that last changed the control. */
 273 };
 274
 275 struct uvc_format_desc {
 276         char *name;
 277         u8 guid[16];
 278         u32 fcc;
 279 };
 280
 281 /* The term 'entity' refers to both UVC units and UVC terminals.
 282  *
 283  * The type field is either the terminal type (wTerminalType in the terminal
 284  * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor).
 285  * As the bDescriptorSubtype field is one byte long, the type value will
 286  * always have a null MSB for units. All terminal types defined by the UVC
 287  * specification have a non-null MSB, so it is safe to use the MSB to
 288  * differentiate between units and terminals as long as the descriptor parsing
 289  * code makes sure terminal types have a non-null MSB.
 290  *
 291  * For terminals, the type's most significant bit stores the terminal
 292  * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should
 293  * always be accessed with the UVC_ENTITY_* macros and never directly.
 294  */
 295
 296 #define UVC_ENTITY_FLAG_DEFAULT         (1 << 0)
 297
 298 struct uvc_entity {
 299         struct list_head list;          /* Entity as part of a UVC device. */
 300         struct list_head chain;         /* Entity as part of a video device
 301                                          * chain. */
 302         unsigned int flags;
 303
 304         u8 id;
 305         u16 type;
 306         char name[64];
 307
 308         /* Media controller-related fields. */
 309         struct video_device *vdev;
 310         struct v4l2_subdev subdev;
 311         unsigned int num_pads;
 312         unsigned int num_links;
 313         struct media_pad *pads;
 314
 315         union {
 316                 struct {
 317                         u16 wObjectiveFocalLengthMin;
 318                         u16 wObjectiveFocalLengthMax;
 319                         u16 wOcularFocalLength;
 320                         u8  bControlSize;
 321                         u8  *bmControls;
 322                 } camera;
 323
 324                 struct {
 325                         u8  bControlSize;
 326                         u8  *bmControls;
 327                         u8  bTransportModeSize;
 328                         u8  *bmTransportModes;
 329                 } media;
 330
 331                 struct {
 332                 } output;
 333
 334                 struct {
 335                         u16 wMaxMultiplier;
 336                         u8  bControlSize;
 337                         u8  *bmControls;
 338                         u8  bmVideoStandards;
 339                 } processing;
 340
 341                 struct {
 342                 } selector;
 343
 344                 struct {
 345                         u8  guidExtensionCode[16];
 346                         u8  bNumControls;
 347                         u8  bControlSize;
 348                         u8  *bmControls;
 349                         u8  *bmControlsType;
 350                 } extension;
 351         };
 352
 353         u8 bNrInPins;
 354         u8 *baSourceID;
 355
 356         unsigned int ncontrols;
 357         struct uvc_control *controls;
 358 };
 359
 360 struct uvc_frame {
 361         u8  bFrameIndex;
 362         u8  bmCapabilities;
 363         u16 wWidth;
 364         u16 wHeight;
 365         u32 dwMinBitRate;
 366         u32 dwMaxBitRate;
 367         u32 dwMaxVideoFrameBufferSize;
 368         u8  bFrameIntervalType;
 369         u32 dwDefaultFrameInterval;
 370         u32 *dwFrameInterval;
 371 };
 372
 373 struct uvc_format {
 374         u8 type;
 375         u8 index;
 376         u8 bpp;
 377         enum v4l2_colorspace colorspace;
 378         enum v4l2_xfer_func xfer_func;
 379         enum v4l2_ycbcr_encoding ycbcr_enc;
 380         u32 fcc;
 381         u32 flags;
 382
 383         char name[32];
 384
 385         unsigned int nframes;
 386         struct uvc_frame *frame;
 387 };
 388
 389 struct uvc_streaming_header {
 390         u8 bNumFormats;
 391         u8 bEndpointAddress;
 392         u8 bTerminalLink;
 393         u8 bControlSize;
 394         u8 *bmaControls;
 395         /* The following fields are used by input headers only. */
 396         u8 bmInfo;
 397         u8 bStillCaptureMethod;
 398         u8 bTriggerSupport;
 399         u8 bTriggerUsage;
 400 };
 401
 402 enum uvc_buffer_state {
 403         UVC_BUF_STATE_IDLE      = 0,
 404         UVC_BUF_STATE_QUEUED    = 1,
 405         UVC_BUF_STATE_ACTIVE    = 2,
 406         UVC_BUF_STATE_READY     = 3,
 407         UVC_BUF_STATE_DONE      = 4,
 408         UVC_BUF_STATE_ERROR     = 5,
 409 };
 410
 411 struct uvc_buffer {
 412         struct vb2_v4l2_buffer buf;
 413         struct list_head queue;
 414
 415         enum uvc_buffer_state state;
 416         unsigned int error;
 417
 418         void *mem;
 419         unsigned int length;
 420         unsigned int bytesused;
 421
 422         u32 pts;
 423
 424         /* Asynchronous buffer handling. */
 425         struct kref ref;
 426 };
 427
 428 #define UVC_QUEUE_DISCONNECTED          (1 << 0)
 429 #define UVC_QUEUE_DROP_CORRUPTED        (1 << 1)
 430
 431 struct uvc_video_queue {
 432         struct vb2_queue queue;
 433         struct mutex mutex;                     /* Protects queue */
 434
 435         unsigned int flags;
 436         unsigned int buf_used;
 437
 438         spinlock_t irqlock;                     /* Protects irqqueue */
 439         struct list_head irqqueue;
 440 };
 441
 442 struct uvc_video_chain {
 443         struct uvc_device *dev;
 444         struct list_head list;
 445
 446         struct list_head entities;              /* All entities */
 447         struct uvc_entity *processing;          /* Processing unit */
 448         struct uvc_entity *selector;            /* Selector unit */
 449
 450         struct mutex ctrl_mutex;                /* Protects ctrl.info */
 451
 452         struct v4l2_prio_state prio;            /* V4L2 priority state */
 453         u32 caps;                               /* V4L2 chain-wide caps */
 454 };
 455
 456 struct uvc_stats_frame {
 457         unsigned int size;              /* Number of bytes captured */
 458         unsigned int first_data;        /* Index of the first non-empty packet */
 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;            /* Number of packets with a PTS timestamp */
 466         unsigned int nb_pts_diffs;      /* Number of PTS differences inside a frame */
 467         unsigned int last_pts_diff;     /* Index of the last PTS difference */
 468         bool has_initial_pts;           /* Whether the first non-empty packet has a PTS */
 469         bool has_early_pts;             /* Whether a PTS is present before the first non-empty packet */
 470         u32 pts;                        /* PTS of the last packet */
 471
 472         unsigned int nb_scr;            /* Number of packets with a SCR timestamp */
 473         unsigned int nb_scr_diffs;      /* Number of SCR.STC differences inside a frame */
 474         u16 scr_sof;                    /* SCR.SOF of the last packet */
 475         u32 scr_stc;                    /* SCR.STC of the last packet */
 476 };
 477
 478 struct uvc_stats_stream {
 479         ktime_t start_ts;               /* Stream start timestamp */
 480         ktime_t stop_ts;                /* Stream stop timestamp */
 481
 482         unsigned int nb_frames;         /* Number of frames */
 483
 484         unsigned int nb_packets;        /* Number of packets */
 485         unsigned int nb_empty;          /* Number of empty packets */
 486         unsigned int nb_invalid;        /* Number of packets with an invalid header */
 487         unsigned int nb_errors;         /* Number of packets with the error bit set */
 488
 489         unsigned int nb_pts_constant;   /* Number of frames with constant PTS */
 490         unsigned int nb_pts_early;      /* Number of frames with early PTS */
 491         unsigned int nb_pts_initial;    /* Number of frames with initial PTS */
 492
 493         unsigned int nb_scr_count_ok;   /* Number of frames with at least one SCR per non empty packet */
 494         unsigned int nb_scr_diffs_ok;   /* Number of frames with varying SCR.STC */
 495         unsigned int scr_sof_count;     /* STC.SOF counter accumulated since stream start */
 496         unsigned int scr_sof;           /* STC.SOF of the last packet */
 497         unsigned int min_sof;           /* Minimum STC.SOF value */
 498         unsigned int max_sof;           /* Maximum STC.SOF value */
 499 };
 500
 501 #define UVC_METADATA_BUF_SIZE 1024
 502
 503 /**
 504  * struct uvc_copy_op: Context structure to schedule asynchronous memcpy
 505  *
 506  * @buf: active buf object for this operation
 507  * @dst: copy destination address
 508  * @src: copy source address
 509  * @len: copy length
 510  */
 511 struct uvc_copy_op {
 512         struct uvc_buffer *buf;
 513         void *dst;
 514         const __u8 *src;
 515         size_t len;
 516 };
 517
 518 /**
 519  * struct uvc_urb - URB context management structure
 520  *
 521  * @urb: the URB described by this context structure
 522  * @stream: UVC streaming context
 523  * @buffer: memory storage for the URB
 524  * @dma: DMA coherent addressing for the urb_buffer
 525  * @async_operations: counter to indicate the number of copy operations
 526  * @copy_operations: work descriptors for asynchronous copy operations
 527  * @work: work queue entry for asynchronous decode
 528  */
 529 struct uvc_urb {
 530         struct urb *urb;
 531         struct uvc_streaming *stream;
 532
 533         char *buffer;
 534         dma_addr_t dma;
 535
 536         unsigned int async_operations;
 537         struct uvc_copy_op copy_operations[UVC_MAX_PACKETS];
 538         struct work_struct work;
 539 };
 540
 541 struct uvc_streaming {
 542         struct list_head list;
 543         struct uvc_device *dev;
 544         struct video_device vdev;
 545         struct uvc_video_chain *chain;
 546         atomic_t active;
 547
 548         struct usb_interface *intf;
 549         int intfnum;
 550         u16 maxpsize;
 551
 552         struct uvc_streaming_header header;
 553         enum v4l2_buf_type type;
 554
 555         unsigned int nformats;
 556         struct uvc_format *format;
 557
 558         struct uvc_streaming_control ctrl;
 559         struct uvc_format *def_format;
 560         struct uvc_format *cur_format;
 561         struct uvc_frame *cur_frame;
 562
 563         /* Protect access to ctrl, cur_format, cur_frame and hardware video
 564          * probe control.
 565          */
 566         struct mutex mutex;
 567
 568         /* Buffers queue. */
 569         unsigned int frozen : 1;
 570         struct uvc_video_queue queue;
 571         struct workqueue_struct *async_wq;
 572         void (*decode)(struct uvc_urb *uvc_urb, struct uvc_buffer *buf,
 573                        struct uvc_buffer *meta_buf);
 574
 575         struct {
 576                 struct video_device vdev;
 577                 struct uvc_video_queue queue;
 578                 u32 format;
 579         } meta;
 580
 581         /* Context data used by the bulk completion handler. */
 582         struct {
 583                 u8 header[256];
 584                 unsigned int header_size;
 585                 int skip_payload;
 586                 u32 payload_size;
 587                 u32 max_payload_size;
 588         } bulk;
 589
 590         struct uvc_urb uvc_urb[UVC_URBS];
 591         unsigned int urb_size;
 592
 593         u32 sequence;
 594         u8 last_fid;
 595
 596         /* debugfs */
 597         struct dentry *debugfs_dir;
 598         struct {
 599                 struct uvc_stats_frame frame;
 600                 struct uvc_stats_stream stream;
 601         } stats;
 602
 603         /* Timestamps support. */
 604         struct uvc_clock {
 605                 struct uvc_clock_sample {
 606                         u32 dev_stc;
 607                         u16 dev_sof;
 608                         u16 host_sof;
 609                         ktime_t host_time;
 610                 } *samples;
 611
 612                 unsigned int head;
 613                 unsigned int count;
 614                 unsigned int size;
 615
 616                 u16 last_sof;
 617                 u16 sof_offset;
 618
 619                 u8 last_scr[6];
 620
 621                 spinlock_t lock;
 622         } clock;
 623 };
 624
 625 #define for_each_uvc_urb(uvc_urb, uvc_streaming) \
 626         for ((uvc_urb) = &(uvc_streaming)->uvc_urb[0]; \
 627              (uvc_urb) < &(uvc_streaming)->uvc_urb[UVC_URBS]; \
 628              ++(uvc_urb))
 629
 630 static inline u32 uvc_urb_index(const struct uvc_urb *uvc_urb)
 631 {
 632         return uvc_urb - &uvc_urb->stream->uvc_urb[0];
 633 }
 634
 635 struct uvc_device_info {
 636         u32     quirks;
 637         u32     meta_format;
 638 };
 639
 640 struct uvc_device {
 641         struct usb_device *udev;
 642         struct usb_interface *intf;
 643         unsigned long warnings;
 644         u32 quirks;
 645         int intfnum;
 646         char name[32];
 647
 648         const struct uvc_device_info *info;
 649
 650         struct mutex lock;              /* Protects users */
 651         unsigned int users;
 652         atomic_t nmappings;
 653
 654         /* Video control interface */
 655 #ifdef CONFIG_MEDIA_CONTROLLER
 656         struct media_device mdev;
 657 #endif
 658         struct v4l2_device vdev;
 659         u16 uvc_version;
 660         u32 clock_frequency;
 661
 662         struct list_head entities;
 663         struct list_head chains;
 664
 665         /* Video Streaming interfaces */
 666         struct list_head streams;
 667         struct kref ref;
 668
 669         /* Status Interrupt Endpoint */
 670         struct usb_host_endpoint *int_ep;
 671         struct urb *int_urb;
 672         u8 *status;
 673         struct input_dev *input;
 674         char input_phys[64];
 675
 676         struct uvc_ctrl_work {
 677                 struct work_struct work;
 678                 struct urb *urb;
 679                 struct uvc_video_chain *chain;
 680                 struct uvc_control *ctrl;
 681                 const void *data;
 682         } async_ctrl;
 683 };
 684
 685 enum uvc_handle_state {
 686         UVC_HANDLE_PASSIVE      = 0,
 687         UVC_HANDLE_ACTIVE       = 1,
 688 };
 689
 690 struct uvc_fh {
 691         struct v4l2_fh vfh;
 692         struct uvc_video_chain *chain;
 693         struct uvc_streaming *stream;
 694         enum uvc_handle_state state;
 695 };
 696
 697 struct uvc_driver {
 698         struct usb_driver driver;
 699 };
 700
 701 /* ------------------------------------------------------------------------
 702  * Debugging, printing and logging
 703  */
 704
 705 #define UVC_TRACE_PROBE         (1 << 0)
 706 #define UVC_TRACE_DESCR         (1 << 1)
 707 #define UVC_TRACE_CONTROL       (1 << 2)
 708 #define UVC_TRACE_FORMAT        (1 << 3)
 709 #define UVC_TRACE_CAPTURE       (1 << 4)
 710 #define UVC_TRACE_CALLS         (1 << 5)
 711 #define UVC_TRACE_FRAME         (1 << 7)
 712 #define UVC_TRACE_SUSPEND       (1 << 8)
 713 #define UVC_TRACE_STATUS        (1 << 9)
 714 #define UVC_TRACE_VIDEO         (1 << 10)
 715 #define UVC_TRACE_STATS         (1 << 11)
 716 #define UVC_TRACE_CLOCK         (1 << 12)
 717
 718 #define UVC_WARN_MINMAX         0
 719 #define UVC_WARN_PROBE_DEF      1
 720 #define UVC_WARN_XU_GET_RES     2
 721
 722 extern unsigned int uvc_clock_param;
 723 extern unsigned int uvc_no_drop_param;
 724 extern unsigned int uvc_trace_param;
 725 extern unsigned int uvc_timeout_param;
 726 extern unsigned int uvc_hw_timestamps_param;
 727
 728 #define uvc_trace(flag, msg...) \
 729         do { \
 730                 if (uvc_trace_param & flag) \
 731                         printk(KERN_DEBUG "uvcvideo: " msg); \
 732         } while (0)
 733
 734 #define uvc_warn_once(dev, warn, msg...) \
 735         do { \
 736                 if (!test_and_set_bit(warn, &dev->warnings)) \
 737                         printk(KERN_INFO "uvcvideo: " msg); \
 738         } while (0)
 739
 740 #define uvc_printk(level, msg...) \
 741         printk(level "uvcvideo: " msg)
 742
 743 /* --------------------------------------------------------------------------
 744  * Internal functions.
 745  */
 746
 747 /* Core driver */
 748 extern struct uvc_driver uvc_driver;
 749
 750 struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id);
 751
 752 /* Video buffers queue management. */
 753 int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
 754                    int drop_corrupted);
 755 void uvc_queue_release(struct uvc_video_queue *queue);
 756 int uvc_request_buffers(struct uvc_video_queue *queue,
 757                         struct v4l2_requestbuffers *rb);
 758 int uvc_query_buffer(struct uvc_video_queue *queue,
 759                      struct v4l2_buffer *v4l2_buf);
 760 int uvc_create_buffers(struct uvc_video_queue *queue,
 761                        struct v4l2_create_buffers *v4l2_cb);
 762 int uvc_queue_buffer(struct uvc_video_queue *queue,
 763                      struct media_device *mdev,
 764                      struct v4l2_buffer *v4l2_buf);
 765 int uvc_export_buffer(struct uvc_video_queue *queue,
 766                       struct v4l2_exportbuffer *exp);
 767 int uvc_dequeue_buffer(struct uvc_video_queue *queue,
 768                        struct v4l2_buffer *v4l2_buf, int nonblocking);
 769 int uvc_queue_streamon(struct uvc_video_queue *queue, enum v4l2_buf_type type);
 770 int uvc_queue_streamoff(struct uvc_video_queue *queue, enum v4l2_buf_type type);
 771 void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
 772 struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
 773                                          struct uvc_buffer *buf);
 774 struct uvc_buffer *uvc_queue_get_current_buffer(struct uvc_video_queue *queue);
 775 void uvc_queue_buffer_release(struct uvc_buffer *buf);
 776 int uvc_queue_mmap(struct uvc_video_queue *queue,
 777                    struct vm_area_struct *vma);
 778 __poll_t uvc_queue_poll(struct uvc_video_queue *queue, struct file *file,
 779                         poll_table *wait);
 780 #ifndef CONFIG_MMU
 781 unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue,
 782                                           unsigned long pgoff);
 783 #endif
 784 int uvc_queue_allocated(struct uvc_video_queue *queue);
 785 static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
 786 {
 787         return vb2_is_streaming(&queue->queue);
 788 }
 789
 790 /* V4L2 interface */
 791 extern const struct v4l2_ioctl_ops uvc_ioctl_ops;
 792 extern const struct v4l2_file_operations uvc_fops;
 793
 794 /* Media controller */
 795 int uvc_mc_register_entities(struct uvc_video_chain *chain);
 796 void uvc_mc_cleanup_entity(struct uvc_entity *entity);
 797
 798 /* Video */
 799 int uvc_video_init(struct uvc_streaming *stream);
 800 int uvc_video_suspend(struct uvc_streaming *stream);
 801 int uvc_video_resume(struct uvc_streaming *stream, int reset);
 802 int uvc_video_start_streaming(struct uvc_streaming *stream);
 803 void uvc_video_stop_streaming(struct uvc_streaming *stream);
 804 int uvc_probe_video(struct uvc_streaming *stream,
 805                     struct uvc_streaming_control *probe);
 806 int uvc_query_ctrl(struct uvc_device *dev, u8 query, u8 unit,
 807                    u8 intfnum, u8 cs, void *data, u16 size);
 808 void uvc_video_clock_update(struct uvc_streaming *stream,
 809                             struct vb2_v4l2_buffer *vbuf,
 810                             struct uvc_buffer *buf);
 811 int uvc_meta_register(struct uvc_streaming *stream);
 812
 813 int uvc_register_video_device(struct uvc_device *dev,
 814                               struct uvc_streaming *stream,
 815                               struct video_device *vdev,
 816                               struct uvc_video_queue *queue,
 817                               enum v4l2_buf_type type,
 818                               const struct v4l2_file_operations *fops,
 819                               const struct v4l2_ioctl_ops *ioctl_ops);
 820
 821 /* Status */
 822 int uvc_status_init(struct uvc_device *dev);
 823 void uvc_status_unregister(struct uvc_device *dev);
 824 void uvc_status_cleanup(struct uvc_device *dev);
 825 int uvc_status_start(struct uvc_device *dev, gfp_t flags);
 826 void uvc_status_stop(struct uvc_device *dev);
 827
 828 /* Controls */
 829 extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops;
 830
 831 int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
 832                         struct v4l2_queryctrl *v4l2_ctrl);
 833 int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
 834                         struct v4l2_querymenu *query_menu);
 835
 836 int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
 837                          const struct uvc_control_mapping *mapping);
 838 int uvc_ctrl_init_device(struct uvc_device *dev);
 839 void uvc_ctrl_cleanup_device(struct uvc_device *dev);
 840 int uvc_ctrl_restore_values(struct uvc_device *dev);
 841 bool uvc_ctrl_status_event(struct urb *urb, struct uvc_video_chain *chain,
 842                            struct uvc_control *ctrl, const u8 *data);
 843
 844 int uvc_ctrl_begin(struct uvc_video_chain *chain);
 845 int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback,
 846                       const struct v4l2_ext_control *xctrls,
 847                       unsigned int xctrls_count);
 848 static inline int uvc_ctrl_commit(struct uvc_fh *handle,
 849                                   const struct v4l2_ext_control *xctrls,
 850                                   unsigned int xctrls_count)
 851 {
 852         return __uvc_ctrl_commit(handle, 0, xctrls, xctrls_count);
 853 }
 854 static inline int uvc_ctrl_rollback(struct uvc_fh *handle)
 855 {
 856         return __uvc_ctrl_commit(handle, 1, NULL, 0);
 857 }
 858
 859 int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl);
 860 int uvc_ctrl_set(struct uvc_fh *handle, struct v4l2_ext_control *xctrl);
 861
 862 int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
 863                       struct uvc_xu_control_query *xqry);
 864
 865 /* Utility functions */
 866 void uvc_simplify_fraction(u32 *numerator, u32 *denominator,
 867                            unsigned int n_terms, unsigned int threshold);
 868 u32 uvc_fraction_to_interval(u32 numerator, u32 denominator);
 869 struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts,
 870                                             u8 epaddr);
 871
 872 /* Quirks support */
 873 void uvc_video_decode_isight(struct uvc_urb *uvc_urb,
 874                              struct uvc_buffer *buf,
 875                              struct uvc_buffer *meta_buf);
 876
 877 /* debugfs and statistics */
 878 void uvc_debugfs_init(void);
 879 void uvc_debugfs_cleanup(void);
 880 void uvc_debugfs_init_stream(struct uvc_streaming *stream);
 881 void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream);
 882
 883 size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf,
 884                             size_t size);
 885
 886 #endif