drivers/media/video/uvc/uvcvideo.h

   1 #ifndef _USB_VIDEO_H_
   2 #define _USB_VIDEO_H_
   3
   4 #include <linux/kernel.h>
   5 #include <linux/videodev2.h>
   6
   7 /*
   8  * Dynamic controls
   9  */
  10
  11 /* Data types for UVC control data */
  12 #define UVC_CTRL_DATA_TYPE_RAW          0
  13 #define UVC_CTRL_DATA_TYPE_SIGNED       1
  14 #define UVC_CTRL_DATA_TYPE_UNSIGNED     2
  15 #define UVC_CTRL_DATA_TYPE_BOOLEAN      3
  16 #define UVC_CTRL_DATA_TYPE_ENUM         4
  17 #define UVC_CTRL_DATA_TYPE_BITMASK      5
  18
  19 /* Control flags */
  20 #define UVC_CONTROL_SET_CUR     (1 << 0)
  21 #define UVC_CONTROL_GET_CUR     (1 << 1)
  22 #define UVC_CONTROL_GET_MIN     (1 << 2)
  23 #define UVC_CONTROL_GET_MAX     (1 << 3)
  24 #define UVC_CONTROL_GET_RES     (1 << 4)
  25 #define UVC_CONTROL_GET_DEF     (1 << 5)
  26 /* Control should be saved at suspend and restored at resume. */
  27 #define UVC_CONTROL_RESTORE     (1 << 6)
  28 /* Control can be updated by the camera. */
  29 #define UVC_CONTROL_AUTO_UPDATE (1 << 7)
  30
  31 #define UVC_CONTROL_GET_RANGE   (UVC_CONTROL_GET_CUR | UVC_CONTROL_GET_MIN | \
  32                                  UVC_CONTROL_GET_MAX | UVC_CONTROL_GET_RES | \
  33                                  UVC_CONTROL_GET_DEF)
  34
  35 struct uvc_xu_control_info {
  36         __u8 entity[16];
  37         __u8 index;
  38         __u8 selector;
  39         __u16 size;
  40         __u32 flags;
  41 };
  42
  43 struct uvc_xu_control_mapping {
  44         __u32 id;
  45         __u8 name[32];
  46         __u8 entity[16];
  47         __u8 selector;
  48
  49         __u8 size;
  50         __u8 offset;
  51         enum v4l2_ctrl_type v4l2_type;
  52         __u32 data_type;
  53 };
  54
  55 struct uvc_xu_control {
  56         __u8 unit;
  57         __u8 selector;
  58         __u16 size;
  59         __u8 __user *data;
  60 };
  61
  62 #define UVCIOC_CTRL_ADD         _IOW('U', 1, struct uvc_xu_control_info)
  63 #define UVCIOC_CTRL_MAP         _IOWR('U', 2, struct uvc_xu_control_mapping)
  64 #define UVCIOC_CTRL_GET         _IOWR('U', 3, struct uvc_xu_control)
  65 #define UVCIOC_CTRL_SET         _IOW('U', 4, struct uvc_xu_control)
  66
  67 #ifdef __KERNEL__
  68
  69 #include <linux/poll.h>
  70
  71 /* --------------------------------------------------------------------------
  72  * UVC constants
  73  */
  74
  75 #define SC_UNDEFINED                    0x00
  76 #define SC_VIDEOCONTROL                 0x01
  77 #define SC_VIDEOSTREAMING               0x02
  78 #define SC_VIDEO_INTERFACE_COLLECTION   0x03
  79
  80 #define PC_PROTOCOL_UNDEFINED           0x00
  81
  82 #define CS_UNDEFINED                    0x20
  83 #define CS_DEVICE                       0x21
  84 #define CS_CONFIGURATION                0x22
  85 #define CS_STRING                       0x23
  86 #define CS_INTERFACE                    0x24
  87 #define CS_ENDPOINT                     0x25
  88
  89 /* VideoControl class specific interface descriptor */
  90 #define VC_DESCRIPTOR_UNDEFINED         0x00
  91 #define VC_HEADER                       0x01
  92 #define VC_INPUT_TERMINAL               0x02
  93 #define VC_OUTPUT_TERMINAL              0x03
  94 #define VC_SELECTOR_UNIT                0x04
  95 #define VC_PROCESSING_UNIT              0x05
  96 #define VC_EXTENSION_UNIT               0x06
  97
  98 /* VideoStreaming class specific interface descriptor */
  99 #define VS_UNDEFINED                    0x00
 100 #define VS_INPUT_HEADER                 0x01
 101 #define VS_OUTPUT_HEADER                0x02
 102 #define VS_STILL_IMAGE_FRAME            0x03
 103 #define VS_FORMAT_UNCOMPRESSED          0x04
 104 #define VS_FRAME_UNCOMPRESSED           0x05
 105 #define VS_FORMAT_MJPEG                 0x06
 106 #define VS_FRAME_MJPEG                  0x07
 107 #define VS_FORMAT_MPEG2TS               0x0a
 108 #define VS_FORMAT_DV                    0x0c
 109 #define VS_COLORFORMAT                  0x0d
 110 #define VS_FORMAT_FRAME_BASED           0x10
 111 #define VS_FRAME_FRAME_BASED            0x11
 112 #define VS_FORMAT_STREAM_BASED          0x12
 113
 114 /* Endpoint type */
 115 #define EP_UNDEFINED                    0x00
 116 #define EP_GENERAL                      0x01
 117 #define EP_ENDPOINT                     0x02
 118 #define EP_INTERRUPT                    0x03
 119
 120 /* Request codes */
 121 #define RC_UNDEFINED                    0x00
 122 #define SET_CUR                         0x01
 123 #define GET_CUR                         0x81
 124 #define GET_MIN                         0x82
 125 #define GET_MAX                         0x83
 126 #define GET_RES                         0x84
 127 #define GET_LEN                         0x85
 128 #define GET_INFO                        0x86
 129 #define GET_DEF                         0x87
 130
 131 /* VideoControl interface controls */
 132 #define VC_CONTROL_UNDEFINED            0x00
 133 #define VC_VIDEO_POWER_MODE_CONTROL     0x01
 134 #define VC_REQUEST_ERROR_CODE_CONTROL   0x02
 135
 136 /* Terminal controls */
 137 #define TE_CONTROL_UNDEFINED            0x00
 138
 139 /* Selector Unit controls */
 140 #define SU_CONTROL_UNDEFINED            0x00
 141 #define SU_INPUT_SELECT_CONTROL         0x01
 142
 143 /* Camera Terminal controls */
 144 #define CT_CONTROL_UNDEFINED                            0x00
 145 #define CT_SCANNING_MODE_CONTROL                        0x01
 146 #define CT_AE_MODE_CONTROL                              0x02
 147 #define CT_AE_PRIORITY_CONTROL                          0x03
 148 #define CT_EXPOSURE_TIME_ABSOLUTE_CONTROL               0x04
 149 #define CT_EXPOSURE_TIME_RELATIVE_CONTROL               0x05
 150 #define CT_FOCUS_ABSOLUTE_CONTROL                       0x06
 151 #define CT_FOCUS_RELATIVE_CONTROL                       0x07
 152 #define CT_FOCUS_AUTO_CONTROL                           0x08
 153 #define CT_IRIS_ABSOLUTE_CONTROL                        0x09
 154 #define CT_IRIS_RELATIVE_CONTROL                        0x0a
 155 #define CT_ZOOM_ABSOLUTE_CONTROL                        0x0b
 156 #define CT_ZOOM_RELATIVE_CONTROL                        0x0c
 157 #define CT_PANTILT_ABSOLUTE_CONTROL                     0x0d
 158 #define CT_PANTILT_RELATIVE_CONTROL                     0x0e
 159 #define CT_ROLL_ABSOLUTE_CONTROL                        0x0f
 160 #define CT_ROLL_RELATIVE_CONTROL                        0x10
 161 #define CT_PRIVACY_CONTROL                              0x11
 162
 163 /* Processing Unit controls */
 164 #define PU_CONTROL_UNDEFINED                            0x00
 165 #define PU_BACKLIGHT_COMPENSATION_CONTROL               0x01
 166 #define PU_BRIGHTNESS_CONTROL                           0x02
 167 #define PU_CONTRAST_CONTROL                             0x03
 168 #define PU_GAIN_CONTROL                                 0x04
 169 #define PU_POWER_LINE_FREQUENCY_CONTROL                 0x05
 170 #define PU_HUE_CONTROL                                  0x06
 171 #define PU_SATURATION_CONTROL                           0x07
 172 #define PU_SHARPNESS_CONTROL                            0x08
 173 #define PU_GAMMA_CONTROL                                0x09
 174 #define PU_WHITE_BALANCE_TEMPERATURE_CONTROL            0x0a
 175 #define PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL       0x0b
 176 #define PU_WHITE_BALANCE_COMPONENT_CONTROL              0x0c
 177 #define PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL         0x0d
 178 #define PU_DIGITAL_MULTIPLIER_CONTROL                   0x0e
 179 #define PU_DIGITAL_MULTIPLIER_LIMIT_CONTROL             0x0f
 180 #define PU_HUE_AUTO_CONTROL                             0x10
 181 #define PU_ANALOG_VIDEO_STANDARD_CONTROL                0x11
 182 #define PU_ANALOG_LOCK_STATUS_CONTROL                   0x12
 183
 184 #define LXU_MOTOR_PANTILT_RELATIVE_CONTROL              0x01
 185 #define LXU_MOTOR_PANTILT_RESET_CONTROL                 0x02
 186 #define LXU_MOTOR_FOCUS_MOTOR_CONTROL                   0x03
 187
 188 /* VideoStreaming interface controls */
 189 #define VS_CONTROL_UNDEFINED            0x00
 190 #define VS_PROBE_CONTROL                0x01
 191 #define VS_COMMIT_CONTROL               0x02
 192 #define VS_STILL_PROBE_CONTROL          0x03
 193 #define VS_STILL_COMMIT_CONTROL         0x04
 194 #define VS_STILL_IMAGE_TRIGGER_CONTROL  0x05
 195 #define VS_STREAM_ERROR_CODE_CONTROL    0x06
 196 #define VS_GENERATE_KEY_FRAME_CONTROL   0x07
 197 #define VS_UPDATE_FRAME_SEGMENT_CONTROL 0x08
 198 #define VS_SYNC_DELAY_CONTROL           0x09
 199
 200 #define TT_VENDOR_SPECIFIC              0x0100
 201 #define TT_STREAMING                    0x0101
 202
 203 /* Input Terminal types */
 204 #define ITT_VENDOR_SPECIFIC             0x0200
 205 #define ITT_CAMERA                      0x0201
 206 #define ITT_MEDIA_TRANSPORT_INPUT       0x0202
 207
 208 /* Output Terminal types */
 209 #define OTT_VENDOR_SPECIFIC             0x0300
 210 #define OTT_DISPLAY                     0x0301
 211 #define OTT_MEDIA_TRANSPORT_OUTPUT      0x0302
 212
 213 /* External Terminal types */
 214 #define EXTERNAL_VENDOR_SPECIFIC        0x0400
 215 #define COMPOSITE_CONNECTOR             0x0401
 216 #define SVIDEO_CONNECTOR                0x0402
 217 #define COMPONENT_CONNECTOR             0x0403
 218
 219 #define UVC_TERM_INPUT                  0x0000
 220 #define UVC_TERM_OUTPUT                 0x8000
 221
 222 #define UVC_ENTITY_TYPE(entity)         ((entity)->type & 0x7fff)
 223 #define UVC_ENTITY_IS_UNIT(entity)      (((entity)->type & 0xff00) == 0)
 224 #define UVC_ENTITY_IS_TERM(entity)      (((entity)->type & 0xff00) != 0)
 225 #define UVC_ENTITY_IS_ITERM(entity) \
 226         (((entity)->type & 0x8000) == UVC_TERM_INPUT)
 227 #define UVC_ENTITY_IS_OTERM(entity) \
 228         (((entity)->type & 0x8000) == UVC_TERM_OUTPUT)
 229
 230 #define UVC_STATUS_TYPE_CONTROL         1
 231 #define UVC_STATUS_TYPE_STREAMING       2
 232
 233 /* ------------------------------------------------------------------------
 234  * GUIDs
 235  */
 236 #define UVC_GUID_UVC_CAMERA \
 237         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 238          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}
 239 #define UVC_GUID_UVC_OUTPUT \
 240         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 241          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}
 242 #define UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT \
 243         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 244          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03}
 245 #define UVC_GUID_UVC_PROCESSING \
 246         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 247          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01}
 248 #define UVC_GUID_UVC_SELECTOR \
 249         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 250          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02}
 251
 252 #define UVC_GUID_LOGITECH_DEV_INFO \
 253         {0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \
 254          0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x1e}
 255 #define UVC_GUID_LOGITECH_USER_HW \
 256         {0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \
 257          0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x1f}
 258 #define UVC_GUID_LOGITECH_VIDEO \
 259         {0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \
 260          0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x50}
 261 #define UVC_GUID_LOGITECH_MOTOR \
 262         {0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \
 263          0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x56}
 264
 265 #define UVC_GUID_FORMAT_MJPEG \
 266         { 'M',  'J',  'P',  'G', 0x00, 0x00, 0x10, 0x00, \
 267          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 268 #define UVC_GUID_FORMAT_YUY2 \
 269         { 'Y',  'U',  'Y',  '2', 0x00, 0x00, 0x10, 0x00, \
 270          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 271 #define UVC_GUID_FORMAT_NV12 \
 272         { 'N',  'V',  '1',  '2', 0x00, 0x00, 0x10, 0x00, \
 273          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 274 #define UVC_GUID_FORMAT_YV12 \
 275         { 'Y',  'V',  '1',  '2', 0x00, 0x00, 0x10, 0x00, \
 276          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 277 #define UVC_GUID_FORMAT_I420 \
 278         { 'I',  '4',  '2',  '0', 0x00, 0x00, 0x10, 0x00, \
 279          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 280 #define UVC_GUID_FORMAT_UYVY \
 281         { 'U',  'Y',  'V',  'Y', 0x00, 0x00, 0x10, 0x00, \
 282          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 283 #define UVC_GUID_FORMAT_Y800 \
 284         { 'Y',  '8',  '0',  '0', 0x00, 0x00, 0x10, 0x00, \
 285          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 286 #define UVC_GUID_FORMAT_BY8 \
 287         { 'B',  'Y',  '8',  ' ', 0x00, 0x00, 0x10, 0x00, \
 288          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 289
 290
 291 /* ------------------------------------------------------------------------
 292  * Driver specific constants.
 293  */
 294
 295 #define DRIVER_VERSION_NUMBER   KERNEL_VERSION(0, 1, 0)
 296
 297 /* Number of isochronous URBs. */
 298 #define UVC_URBS                5
 299 /* Maximum number of packets per URB. */
 300 #define UVC_MAX_PACKETS         32
 301 /* Maximum number of video buffers. */
 302 #define UVC_MAX_VIDEO_BUFFERS   32
 303 /* Maximum status buffer size in bytes of interrupt URB. */
 304 #define UVC_MAX_STATUS_SIZE     16
 305
 306 #define UVC_CTRL_CONTROL_TIMEOUT        300
 307 #define UVC_CTRL_STREAMING_TIMEOUT      1000
 308
 309 /* Devices quirks */
 310 #define UVC_QUIRK_STATUS_INTERVAL       0x00000001
 311 #define UVC_QUIRK_PROBE_MINMAX          0x00000002
 312 #define UVC_QUIRK_PROBE_EXTRAFIELDS     0x00000004
 313 #define UVC_QUIRK_BUILTIN_ISIGHT        0x00000008
 314 #define UVC_QUIRK_STREAM_NO_FID         0x00000010
 315 #define UVC_QUIRK_IGNORE_SELECTOR_UNIT  0x00000020
 316 #define UVC_QUIRK_PRUNE_CONTROLS        0x00000040
 317
 318 /* Format flags */
 319 #define UVC_FMT_FLAG_COMPRESSED         0x00000001
 320 #define UVC_FMT_FLAG_STREAM             0x00000002
 321
 322 /* ------------------------------------------------------------------------
 323  * Structures.
 324  */
 325
 326 struct uvc_device;
 327
 328 /* TODO: Put the most frequently accessed fields at the beginning of
 329  * structures to maximize cache efficiency.
 330  */
 331 struct uvc_streaming_control {
 332         __u16 bmHint;
 333         __u8  bFormatIndex;
 334         __u8  bFrameIndex;
 335         __u32 dwFrameInterval;
 336         __u16 wKeyFrameRate;
 337         __u16 wPFrameRate;
 338         __u16 wCompQuality;
 339         __u16 wCompWindowSize;
 340         __u16 wDelay;
 341         __u32 dwMaxVideoFrameSize;
 342         __u32 dwMaxPayloadTransferSize;
 343         __u32 dwClockFrequency;
 344         __u8  bmFramingInfo;
 345         __u8  bPreferedVersion;
 346         __u8  bMinVersion;
 347         __u8  bMaxVersion;
 348 };
 349
 350 struct uvc_menu_info {
 351         __u32 value;
 352         __u8 name[32];
 353 };
 354
 355 struct uvc_control_info {
 356         struct list_head list;
 357         struct list_head mappings;
 358
 359         __u8 entity[16];
 360         __u8 index;
 361         __u8 selector;
 362
 363         __u16 size;
 364         __u32 flags;
 365 };
 366
 367 struct uvc_control_mapping {
 368         struct list_head list;
 369
 370         struct uvc_control_info *ctrl;
 371
 372         __u32 id;
 373         __u8 name[32];
 374         __u8 entity[16];
 375         __u8 selector;
 376
 377         __u8 size;
 378         __u8 offset;
 379         enum v4l2_ctrl_type v4l2_type;
 380         __u32 data_type;
 381
 382         struct uvc_menu_info *menu_info;
 383         __u32 menu_count;
 384
 385         __s32 (*get) (struct uvc_control_mapping *mapping, __u8 query,
 386                       const __u8 *data);
 387         void (*set) (struct uvc_control_mapping *mapping, __s32 value,
 388                      __u8 *data);
 389 };
 390
 391 struct uvc_control {
 392         struct uvc_entity *entity;
 393         struct uvc_control_info *info;
 394
 395         __u8 index;     /* Used to match the uvc_control entry with a
 396                            uvc_control_info. */
 397         __u8 dirty : 1,
 398              loaded : 1,
 399              modified : 1;
 400
 401         __u8 *data;
 402 };
 403
 404 struct uvc_format_desc {
 405         char *name;
 406         __u8 guid[16];
 407         __u32 fcc;
 408 };
 409
 410 /* The term 'entity' refers to both UVC units and UVC terminals.
 411  *
 412  * The type field is either the terminal type (wTerminalType in the terminal
 413  * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor).
 414  * As the bDescriptorSubtype field is one byte long, the type value will
 415  * always have a null MSB for units. All terminal types defined by the UVC
 416  * specification have a non-null MSB, so it is safe to use the MSB to
 417  * differentiate between units and terminals as long as the descriptor parsing
 418  * code makes sure terminal types have a non-null MSB.
 419  *
 420  * For terminals, the type's most significant bit stores the terminal
 421  * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should
 422  * always be accessed with the UVC_ENTITY_* macros and never directly.
 423  */
 424
 425 struct uvc_entity {
 426         struct list_head list;          /* Entity as part of a UVC device. */
 427         struct list_head chain;         /* Entity as part of a video device
 428                                          * chain. */
 429         __u8 id;
 430         __u16 type;
 431         char name[64];
 432
 433         union {
 434                 struct {
 435                         __u16 wObjectiveFocalLengthMin;
 436                         __u16 wObjectiveFocalLengthMax;
 437                         __u16 wOcularFocalLength;
 438                         __u8  bControlSize;
 439                         __u8  *bmControls;
 440                 } camera;
 441
 442                 struct {
 443                         __u8  bControlSize;
 444                         __u8  *bmControls;
 445                         __u8  bTransportModeSize;
 446                         __u8  *bmTransportModes;
 447                 } media;
 448
 449                 struct {
 450                         __u8  bSourceID;
 451                 } output;
 452
 453                 struct {
 454                         __u8  bSourceID;
 455                         __u16 wMaxMultiplier;
 456                         __u8  bControlSize;
 457                         __u8  *bmControls;
 458                         __u8  bmVideoStandards;
 459                 } processing;
 460
 461                 struct {
 462                         __u8  bNrInPins;
 463                         __u8  *baSourceID;
 464                 } selector;
 465
 466                 struct {
 467                         __u8  guidExtensionCode[16];
 468                         __u8  bNumControls;
 469                         __u8  bNrInPins;
 470                         __u8  *baSourceID;
 471                         __u8  bControlSize;
 472                         __u8  *bmControls;
 473                         __u8  *bmControlsType;
 474                 } extension;
 475         };
 476
 477         unsigned int ncontrols;
 478         struct uvc_control *controls;
 479 };
 480
 481 struct uvc_frame {
 482         __u8  bFrameIndex;
 483         __u8  bmCapabilities;
 484         __u16 wWidth;
 485         __u16 wHeight;
 486         __u32 dwMinBitRate;
 487         __u32 dwMaxBitRate;
 488         __u32 dwMaxVideoFrameBufferSize;
 489         __u8  bFrameIntervalType;
 490         __u32 dwDefaultFrameInterval;
 491         __u32 *dwFrameInterval;
 492 };
 493
 494 struct uvc_format {
 495         __u8 type;
 496         __u8 index;
 497         __u8 bpp;
 498         __u8 colorspace;
 499         __u32 fcc;
 500         __u32 flags;
 501
 502         char name[32];
 503
 504         unsigned int nframes;
 505         struct uvc_frame *frame;
 506 };
 507
 508 struct uvc_streaming_header {
 509         __u8 bNumFormats;
 510         __u8 bEndpointAddress;
 511         __u8 bTerminalLink;
 512         __u8 bControlSize;
 513         __u8 *bmaControls;
 514         /* The following fields are used by input headers only. */
 515         __u8 bmInfo;
 516         __u8 bStillCaptureMethod;
 517         __u8 bTriggerSupport;
 518         __u8 bTriggerUsage;
 519 };
 520
 521 struct uvc_streaming {
 522         struct list_head list;
 523
 524         struct usb_interface *intf;
 525         int intfnum;
 526         __u16 maxpsize;
 527
 528         struct uvc_streaming_header header;
 529         enum v4l2_buf_type type;
 530
 531         unsigned int nformats;
 532         struct uvc_format *format;
 533
 534         struct uvc_streaming_control ctrl;
 535         struct uvc_format *cur_format;
 536         struct uvc_frame *cur_frame;
 537
 538         struct mutex mutex;
 539 };
 540
 541 enum uvc_buffer_state {
 542         UVC_BUF_STATE_IDLE      = 0,
 543         UVC_BUF_STATE_QUEUED    = 1,
 544         UVC_BUF_STATE_ACTIVE    = 2,
 545         UVC_BUF_STATE_DONE      = 3,
 546         UVC_BUF_STATE_ERROR     = 4,
 547 };
 548
 549 struct uvc_buffer {
 550         unsigned long vma_use_count;
 551         struct list_head stream;
 552
 553         /* Touched by interrupt handler. */
 554         struct v4l2_buffer buf;
 555         struct list_head queue;
 556         wait_queue_head_t wait;
 557         enum uvc_buffer_state state;
 558 };
 559
 560 #define UVC_QUEUE_STREAMING             (1 << 0)
 561 #define UVC_QUEUE_DISCONNECTED          (1 << 1)
 562 #define UVC_QUEUE_DROP_INCOMPLETE       (1 << 2)
 563
 564 struct uvc_video_queue {
 565         enum v4l2_buf_type type;
 566
 567         void *mem;
 568         unsigned int flags;
 569         __u32 sequence;
 570
 571         unsigned int count;
 572         unsigned int buf_size;
 573         unsigned int buf_used;
 574         struct uvc_buffer buffer[UVC_MAX_VIDEO_BUFFERS];
 575         struct mutex mutex;     /* protects buffers and mainqueue */
 576         spinlock_t irqlock;     /* protects irqqueue */
 577
 578         struct list_head mainqueue;
 579         struct list_head irqqueue;
 580 };
 581
 582 struct uvc_video_device {
 583         struct uvc_device *dev;
 584         struct video_device *vdev;
 585         atomic_t active;
 586         unsigned int frozen : 1;
 587
 588         struct list_head iterms;                /* Input terminals */
 589         struct uvc_entity *oterm;               /* Output terminal */
 590         struct uvc_entity *sterm;               /* USB streaming terminal */
 591         struct uvc_entity *processing;
 592         struct uvc_entity *selector;
 593         struct list_head extensions;
 594         struct mutex ctrl_mutex;
 595
 596         struct uvc_video_queue queue;
 597
 598         /* Video streaming object, must always be non-NULL. */
 599         struct uvc_streaming *streaming;
 600
 601         void (*decode) (struct urb *urb, struct uvc_video_device *video,
 602                         struct uvc_buffer *buf);
 603
 604         /* Context data used by the bulk completion handler. */
 605         struct {
 606                 __u8 header[256];
 607                 unsigned int header_size;
 608                 int skip_payload;
 609                 __u32 payload_size;
 610                 __u32 max_payload_size;
 611         } bulk;
 612
 613         struct urb *urb[UVC_URBS];
 614         char *urb_buffer[UVC_URBS];
 615         dma_addr_t urb_dma[UVC_URBS];
 616         unsigned int urb_size;
 617
 618         __u8 last_fid;
 619 };
 620
 621 enum uvc_device_state {
 622         UVC_DEV_DISCONNECTED = 1,
 623 };
 624
 625 struct uvc_device {
 626         struct usb_device *udev;
 627         struct usb_interface *intf;
 628         unsigned long warnings;
 629         __u32 quirks;
 630         int intfnum;
 631         char name[32];
 632
 633         enum uvc_device_state state;
 634         struct kref kref;
 635         struct list_head list;
 636
 637         /* Video control interface */
 638         __u16 uvc_version;
 639         __u32 clock_frequency;
 640
 641         struct list_head entities;
 642
 643         struct uvc_video_device video;
 644
 645         /* Status Interrupt Endpoint */
 646         struct usb_host_endpoint *int_ep;
 647         struct urb *int_urb;
 648         __u8 *status;
 649         struct input_dev *input;
 650         char input_phys[64];
 651
 652         /* Video Streaming interfaces */
 653         struct list_head streaming;
 654 };
 655
 656 enum uvc_handle_state {
 657         UVC_HANDLE_PASSIVE      = 0,
 658         UVC_HANDLE_ACTIVE       = 1,
 659 };
 660
 661 struct uvc_fh {
 662         struct uvc_video_device *device;
 663         enum uvc_handle_state state;
 664 };
 665
 666 struct uvc_driver {
 667         struct usb_driver driver;
 668
 669         struct mutex open_mutex;        /* protects from open/disconnect race */
 670
 671         struct list_head devices;       /* struct uvc_device list */
 672         struct list_head controls;      /* struct uvc_control_info list */
 673         struct mutex ctrl_mutex;        /* protects controls and devices
 674                                            lists */
 675 };
 676
 677 /* ------------------------------------------------------------------------
 678  * Debugging, printing and logging
 679  */
 680
 681 #define UVC_TRACE_PROBE         (1 << 0)
 682 #define UVC_TRACE_DESCR         (1 << 1)
 683 #define UVC_TRACE_CONTROL       (1 << 2)
 684 #define UVC_TRACE_FORMAT        (1 << 3)
 685 #define UVC_TRACE_CAPTURE       (1 << 4)
 686 #define UVC_TRACE_CALLS         (1 << 5)
 687 #define UVC_TRACE_IOCTL         (1 << 6)
 688 #define UVC_TRACE_FRAME         (1 << 7)
 689 #define UVC_TRACE_SUSPEND       (1 << 8)
 690 #define UVC_TRACE_STATUS        (1 << 9)
 691
 692 #define UVC_WARN_MINMAX         0
 693 #define UVC_WARN_PROBE_DEF      1
 694
 695 extern unsigned int uvc_no_drop_param;
 696 extern unsigned int uvc_trace_param;
 697
 698 #define uvc_trace(flag, msg...) \
 699         do { \
 700                 if (uvc_trace_param & flag) \
 701                         printk(KERN_DEBUG "uvcvideo: " msg); \
 702         } while (0)
 703
 704 #define uvc_warn_once(dev, warn, msg...) \
 705         do { \
 706                 if (!test_and_set_bit(warn, &dev->warnings)) \
 707                         printk(KERN_INFO "uvcvideo: " msg); \
 708         } while (0)
 709
 710 #define uvc_printk(level, msg...) \
 711         printk(level "uvcvideo: " msg)
 712
 713 #define UVC_GUID_FORMAT "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-" \
 714                         "%02x%02x%02x%02x%02x%02x"
 715 #define UVC_GUID_ARGS(guid) \
 716         (guid)[3],  (guid)[2],  (guid)[1],  (guid)[0], \
 717         (guid)[5],  (guid)[4], \
 718         (guid)[7],  (guid)[6], \
 719         (guid)[8],  (guid)[9], \
 720         (guid)[10], (guid)[11], (guid)[12], \
 721         (guid)[13], (guid)[14], (guid)[15]
 722
 723 /* --------------------------------------------------------------------------
 724  * Internal functions.
 725  */
 726
 727 /* Core driver */
 728 extern struct uvc_driver uvc_driver;
 729 extern void uvc_delete(struct kref *kref);
 730
 731 /* Video buffers queue management. */
 732 extern void uvc_queue_init(struct uvc_video_queue *queue,
 733                 enum v4l2_buf_type type);
 734 extern int uvc_alloc_buffers(struct uvc_video_queue *queue,
 735                 unsigned int nbuffers, unsigned int buflength);
 736 extern int uvc_free_buffers(struct uvc_video_queue *queue);
 737 extern int uvc_query_buffer(struct uvc_video_queue *queue,
 738                 struct v4l2_buffer *v4l2_buf);
 739 extern int uvc_queue_buffer(struct uvc_video_queue *queue,
 740                 struct v4l2_buffer *v4l2_buf);
 741 extern int uvc_dequeue_buffer(struct uvc_video_queue *queue,
 742                 struct v4l2_buffer *v4l2_buf, int nonblocking);
 743 extern int uvc_queue_enable(struct uvc_video_queue *queue, int enable);
 744 extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
 745 extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
 746                 struct uvc_buffer *buf);
 747 extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue,
 748                 struct file *file, poll_table *wait);
 749 static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
 750 {
 751         return queue->flags & UVC_QUEUE_STREAMING;
 752 }
 753
 754 /* V4L2 interface */
 755 extern const struct v4l2_file_operations uvc_fops;
 756
 757 /* Video */
 758 extern int uvc_video_init(struct uvc_video_device *video);
 759 extern int uvc_video_suspend(struct uvc_video_device *video);
 760 extern int uvc_video_resume(struct uvc_video_device *video);
 761 extern int uvc_video_enable(struct uvc_video_device *video, int enable);
 762 extern int uvc_probe_video(struct uvc_video_device *video,
 763                 struct uvc_streaming_control *probe);
 764 extern int uvc_commit_video(struct uvc_video_device *video,
 765                 struct uvc_streaming_control *ctrl);
 766 extern int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit,
 767                 __u8 intfnum, __u8 cs, void *data, __u16 size);
 768
 769 /* Status */
 770 extern int uvc_status_init(struct uvc_device *dev);
 771 extern void uvc_status_cleanup(struct uvc_device *dev);
 772 extern int uvc_status_suspend(struct uvc_device *dev);
 773 extern int uvc_status_resume(struct uvc_device *dev);
 774
 775 /* Controls */
 776 extern struct uvc_control *uvc_find_control(struct uvc_video_device *video,
 777                 __u32 v4l2_id, struct uvc_control_mapping **mapping);
 778 extern int uvc_query_v4l2_ctrl(struct uvc_video_device *video,
 779                 struct v4l2_queryctrl *v4l2_ctrl);
 780
 781 extern int uvc_ctrl_add_info(struct uvc_control_info *info);
 782 extern int uvc_ctrl_add_mapping(struct uvc_control_mapping *mapping);
 783 extern int uvc_ctrl_init_device(struct uvc_device *dev);
 784 extern void uvc_ctrl_cleanup_device(struct uvc_device *dev);
 785 extern int uvc_ctrl_resume_device(struct uvc_device *dev);
 786 extern void uvc_ctrl_init(void);
 787
 788 extern int uvc_ctrl_begin(struct uvc_video_device *video);
 789 extern int __uvc_ctrl_commit(struct uvc_video_device *video, int rollback);
 790 static inline int uvc_ctrl_commit(struct uvc_video_device *video)
 791 {
 792         return __uvc_ctrl_commit(video, 0);
 793 }
 794 static inline int uvc_ctrl_rollback(struct uvc_video_device *video)
 795 {
 796         return __uvc_ctrl_commit(video, 1);
 797 }
 798
 799 extern int uvc_ctrl_get(struct uvc_video_device *video,
 800                 struct v4l2_ext_control *xctrl);
 801 extern int uvc_ctrl_set(struct uvc_video_device *video,
 802                 struct v4l2_ext_control *xctrl);
 803
 804 extern int uvc_xu_ctrl_query(struct uvc_video_device *video,
 805                 struct uvc_xu_control *ctrl, int set);
 806
 807 /* Utility functions */
 808 extern void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
 809                 unsigned int n_terms, unsigned int threshold);
 810 extern uint32_t uvc_fraction_to_interval(uint32_t numerator,
 811                 uint32_t denominator);
 812 extern struct usb_host_endpoint *uvc_find_endpoint(
 813                 struct usb_host_interface *alts, __u8 epaddr);
 814
 815 /* Quirks support */
 816 void uvc_video_decode_isight(struct urb *urb, struct uvc_video_device *video,
 817                 struct uvc_buffer *buf);
 818
 819 #endif /* __KERNEL__ */
 820
 821 #endif
 822