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 /* VideoControl class specific interface descriptor */
  83 #define VC_DESCRIPTOR_UNDEFINED         0x00
  84 #define VC_HEADER                       0x01
  85 #define VC_INPUT_TERMINAL               0x02
  86 #define VC_OUTPUT_TERMINAL              0x03
  87 #define VC_SELECTOR_UNIT                0x04
  88 #define VC_PROCESSING_UNIT              0x05
  89 #define VC_EXTENSION_UNIT               0x06
  90
  91 /* VideoStreaming class specific interface descriptor */
  92 #define VS_UNDEFINED                    0x00
  93 #define VS_INPUT_HEADER                 0x01
  94 #define VS_OUTPUT_HEADER                0x02
  95 #define VS_STILL_IMAGE_FRAME            0x03
  96 #define VS_FORMAT_UNCOMPRESSED          0x04
  97 #define VS_FRAME_UNCOMPRESSED           0x05
  98 #define VS_FORMAT_MJPEG                 0x06
  99 #define VS_FRAME_MJPEG                  0x07
 100 #define VS_FORMAT_MPEG2TS               0x0a
 101 #define VS_FORMAT_DV                    0x0c
 102 #define VS_COLORFORMAT                  0x0d
 103 #define VS_FORMAT_FRAME_BASED           0x10
 104 #define VS_FRAME_FRAME_BASED            0x11
 105 #define VS_FORMAT_STREAM_BASED          0x12
 106
 107 /* Endpoint type */
 108 #define EP_UNDEFINED                    0x00
 109 #define EP_GENERAL                      0x01
 110 #define EP_ENDPOINT                     0x02
 111 #define EP_INTERRUPT                    0x03
 112
 113 /* Request codes */
 114 #define RC_UNDEFINED                    0x00
 115 #define SET_CUR                         0x01
 116 #define GET_CUR                         0x81
 117 #define GET_MIN                         0x82
 118 #define GET_MAX                         0x83
 119 #define GET_RES                         0x84
 120 #define GET_LEN                         0x85
 121 #define GET_INFO                        0x86
 122 #define GET_DEF                         0x87
 123
 124 /* VideoControl interface controls */
 125 #define VC_CONTROL_UNDEFINED            0x00
 126 #define VC_VIDEO_POWER_MODE_CONTROL     0x01
 127 #define VC_REQUEST_ERROR_CODE_CONTROL   0x02
 128
 129 /* Terminal controls */
 130 #define TE_CONTROL_UNDEFINED            0x00
 131
 132 /* Selector Unit controls */
 133 #define SU_CONTROL_UNDEFINED            0x00
 134 #define SU_INPUT_SELECT_CONTROL         0x01
 135
 136 /* Camera Terminal controls */
 137 #define CT_CONTROL_UNDEFINED                            0x00
 138 #define CT_SCANNING_MODE_CONTROL                        0x01
 139 #define CT_AE_MODE_CONTROL                              0x02
 140 #define CT_AE_PRIORITY_CONTROL                          0x03
 141 #define CT_EXPOSURE_TIME_ABSOLUTE_CONTROL               0x04
 142 #define CT_EXPOSURE_TIME_RELATIVE_CONTROL               0x05
 143 #define CT_FOCUS_ABSOLUTE_CONTROL                       0x06
 144 #define CT_FOCUS_RELATIVE_CONTROL                       0x07
 145 #define CT_FOCUS_AUTO_CONTROL                           0x08
 146 #define CT_IRIS_ABSOLUTE_CONTROL                        0x09
 147 #define CT_IRIS_RELATIVE_CONTROL                        0x0a
 148 #define CT_ZOOM_ABSOLUTE_CONTROL                        0x0b
 149 #define CT_ZOOM_RELATIVE_CONTROL                        0x0c
 150 #define CT_PANTILT_ABSOLUTE_CONTROL                     0x0d
 151 #define CT_PANTILT_RELATIVE_CONTROL                     0x0e
 152 #define CT_ROLL_ABSOLUTE_CONTROL                        0x0f
 153 #define CT_ROLL_RELATIVE_CONTROL                        0x10
 154 #define CT_PRIVACY_CONTROL                              0x11
 155
 156 /* Processing Unit controls */
 157 #define PU_CONTROL_UNDEFINED                            0x00
 158 #define PU_BACKLIGHT_COMPENSATION_CONTROL               0x01
 159 #define PU_BRIGHTNESS_CONTROL                           0x02
 160 #define PU_CONTRAST_CONTROL                             0x03
 161 #define PU_GAIN_CONTROL                                 0x04
 162 #define PU_POWER_LINE_FREQUENCY_CONTROL                 0x05
 163 #define PU_HUE_CONTROL                                  0x06
 164 #define PU_SATURATION_CONTROL                           0x07
 165 #define PU_SHARPNESS_CONTROL                            0x08
 166 #define PU_GAMMA_CONTROL                                0x09
 167 #define PU_WHITE_BALANCE_TEMPERATURE_CONTROL            0x0a
 168 #define PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL       0x0b
 169 #define PU_WHITE_BALANCE_COMPONENT_CONTROL              0x0c
 170 #define PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL         0x0d
 171 #define PU_DIGITAL_MULTIPLIER_CONTROL                   0x0e
 172 #define PU_DIGITAL_MULTIPLIER_LIMIT_CONTROL             0x0f
 173 #define PU_HUE_AUTO_CONTROL                             0x10
 174 #define PU_ANALOG_VIDEO_STANDARD_CONTROL                0x11
 175 #define PU_ANALOG_LOCK_STATUS_CONTROL                   0x12
 176
 177 #define LXU_MOTOR_PANTILT_RELATIVE_CONTROL              0x01
 178 #define LXU_MOTOR_PANTILT_RESET_CONTROL                 0x02
 179 #define LXU_MOTOR_FOCUS_MOTOR_CONTROL                   0x03
 180
 181 /* VideoStreaming interface controls */
 182 #define VS_CONTROL_UNDEFINED            0x00
 183 #define VS_PROBE_CONTROL                0x01
 184 #define VS_COMMIT_CONTROL               0x02
 185 #define VS_STILL_PROBE_CONTROL          0x03
 186 #define VS_STILL_COMMIT_CONTROL         0x04
 187 #define VS_STILL_IMAGE_TRIGGER_CONTROL  0x05
 188 #define VS_STREAM_ERROR_CODE_CONTROL    0x06
 189 #define VS_GENERATE_KEY_FRAME_CONTROL   0x07
 190 #define VS_UPDATE_FRAME_SEGMENT_CONTROL 0x08
 191 #define VS_SYNC_DELAY_CONTROL           0x09
 192
 193 #define TT_VENDOR_SPECIFIC              0x0100
 194 #define TT_STREAMING                    0x0101
 195
 196 /* Input Terminal types */
 197 #define ITT_VENDOR_SPECIFIC             0x0200
 198 #define ITT_CAMERA                      0x0201
 199 #define ITT_MEDIA_TRANSPORT_INPUT       0x0202
 200
 201 /* Output Terminal types */
 202 #define OTT_VENDOR_SPECIFIC             0x0300
 203 #define OTT_DISPLAY                     0x0301
 204 #define OTT_MEDIA_TRANSPORT_OUTPUT      0x0302
 205
 206 /* External Terminal types */
 207 #define EXTERNAL_VENDOR_SPECIFIC        0x0400
 208 #define COMPOSITE_CONNECTOR             0x0401
 209 #define SVIDEO_CONNECTOR                0x0402
 210 #define COMPONENT_CONNECTOR             0x0403
 211
 212 #define UVC_TERM_INPUT                  0x0000
 213 #define UVC_TERM_OUTPUT                 0x8000
 214
 215 #define UVC_ENTITY_TYPE(entity)         ((entity)->type & 0x7fff)
 216 #define UVC_ENTITY_IS_UNIT(entity)      (((entity)->type & 0xff00) == 0)
 217 #define UVC_ENTITY_IS_TERM(entity)      (((entity)->type & 0xff00) != 0)
 218 #define UVC_ENTITY_IS_ITERM(entity) \
 219         (((entity)->type & 0x8000) == UVC_TERM_INPUT)
 220 #define UVC_ENTITY_IS_OTERM(entity) \
 221         (((entity)->type & 0x8000) == UVC_TERM_OUTPUT)
 222
 223 #define UVC_STATUS_TYPE_CONTROL         1
 224 #define UVC_STATUS_TYPE_STREAMING       2
 225
 226 /* ------------------------------------------------------------------------
 227  * GUIDs
 228  */
 229 #define UVC_GUID_UVC_CAMERA \
 230         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 231          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}
 232 #define UVC_GUID_UVC_OUTPUT \
 233         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 234          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}
 235 #define UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT \
 236         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 237          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03}
 238 #define UVC_GUID_UVC_PROCESSING \
 239         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 240          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01}
 241 #define UVC_GUID_UVC_SELECTOR \
 242         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 243          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02}
 244
 245 #define UVC_GUID_LOGITECH_DEV_INFO \
 246         {0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \
 247          0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x1e}
 248 #define UVC_GUID_LOGITECH_USER_HW \
 249         {0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \
 250          0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x1f}
 251 #define UVC_GUID_LOGITECH_VIDEO \
 252         {0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \
 253          0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x50}
 254 #define UVC_GUID_LOGITECH_MOTOR \
 255         {0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \
 256          0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x56}
 257
 258 #define UVC_GUID_FORMAT_MJPEG \
 259         { 'M',  'J',  'P',  'G', 0x00, 0x00, 0x10, 0x00, \
 260          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 261 #define UVC_GUID_FORMAT_YUY2 \
 262         { 'Y',  'U',  'Y',  '2', 0x00, 0x00, 0x10, 0x00, \
 263          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 264 #define UVC_GUID_FORMAT_NV12 \
 265         { 'N',  'V',  '1',  '2', 0x00, 0x00, 0x10, 0x00, \
 266          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 267 #define UVC_GUID_FORMAT_YV12 \
 268         { 'Y',  'V',  '1',  '2', 0x00, 0x00, 0x10, 0x00, \
 269          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 270 #define UVC_GUID_FORMAT_I420 \
 271         { 'I',  '4',  '2',  '0', 0x00, 0x00, 0x10, 0x00, \
 272          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 273 #define UVC_GUID_FORMAT_UYVY \
 274         { 'U',  'Y',  'V',  'Y', 0x00, 0x00, 0x10, 0x00, \
 275          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 276 #define UVC_GUID_FORMAT_Y800 \
 277         { 'Y',  '8',  '0',  '0', 0x00, 0x00, 0x10, 0x00, \
 278          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 279 #define UVC_GUID_FORMAT_BY8 \
 280         { 'B',  'Y',  '8',  ' ', 0x00, 0x00, 0x10, 0x00, \
 281          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 282
 283
 284 /* ------------------------------------------------------------------------
 285  * Driver specific constants.
 286  */
 287
 288 #define DRIVER_VERSION_NUMBER   KERNEL_VERSION(0, 1, 0)
 289
 290 /* Number of isochronous URBs. */
 291 #define UVC_URBS                5
 292 /* Maximum number of packets per URB. */
 293 #define UVC_MAX_PACKETS         32
 294 /* Maximum number of video buffers. */
 295 #define UVC_MAX_VIDEO_BUFFERS   32
 296 /* Maximum status buffer size in bytes of interrupt URB. */
 297 #define UVC_MAX_STATUS_SIZE     16
 298
 299 #define UVC_CTRL_CONTROL_TIMEOUT        300
 300 #define UVC_CTRL_STREAMING_TIMEOUT      1000
 301
 302 /* Devices quirks */
 303 #define UVC_QUIRK_STATUS_INTERVAL       0x00000001
 304 #define UVC_QUIRK_PROBE_MINMAX          0x00000002
 305 #define UVC_QUIRK_PROBE_EXTRAFIELDS     0x00000004
 306 #define UVC_QUIRK_BUILTIN_ISIGHT        0x00000008
 307 #define UVC_QUIRK_STREAM_NO_FID         0x00000010
 308 #define UVC_QUIRK_IGNORE_SELECTOR_UNIT  0x00000020
 309 #define UVC_QUIRK_FIX_BANDWIDTH         0x00000080
 310
 311 /* Format flags */
 312 #define UVC_FMT_FLAG_COMPRESSED         0x00000001
 313 #define UVC_FMT_FLAG_STREAM             0x00000002
 314
 315 /* ------------------------------------------------------------------------
 316  * Structures.
 317  */
 318
 319 struct uvc_device;
 320
 321 /* TODO: Put the most frequently accessed fields at the beginning of
 322  * structures to maximize cache efficiency.
 323  */
 324 struct uvc_streaming_control {
 325         __u16 bmHint;
 326         __u8  bFormatIndex;
 327         __u8  bFrameIndex;
 328         __u32 dwFrameInterval;
 329         __u16 wKeyFrameRate;
 330         __u16 wPFrameRate;
 331         __u16 wCompQuality;
 332         __u16 wCompWindowSize;
 333         __u16 wDelay;
 334         __u32 dwMaxVideoFrameSize;
 335         __u32 dwMaxPayloadTransferSize;
 336         __u32 dwClockFrequency;
 337         __u8  bmFramingInfo;
 338         __u8  bPreferedVersion;
 339         __u8  bMinVersion;
 340         __u8  bMaxVersion;
 341 };
 342
 343 struct uvc_menu_info {
 344         __u32 value;
 345         __u8 name[32];
 346 };
 347
 348 struct uvc_control_info {
 349         struct list_head list;
 350         struct list_head mappings;
 351
 352         __u8 entity[16];
 353         __u8 index;
 354         __u8 selector;
 355
 356         __u16 size;
 357         __u32 flags;
 358 };
 359
 360 struct uvc_control_mapping {
 361         struct list_head list;
 362
 363         struct uvc_control_info *ctrl;
 364
 365         __u32 id;
 366         __u8 name[32];
 367         __u8 entity[16];
 368         __u8 selector;
 369
 370         __u8 size;
 371         __u8 offset;
 372         enum v4l2_ctrl_type v4l2_type;
 373         __u32 data_type;
 374
 375         struct uvc_menu_info *menu_info;
 376         __u32 menu_count;
 377
 378         __s32 (*get) (struct uvc_control_mapping *mapping, __u8 query,
 379                       const __u8 *data);
 380         void (*set) (struct uvc_control_mapping *mapping, __s32 value,
 381                      __u8 *data);
 382 };
 383
 384 struct uvc_control {
 385         struct uvc_entity *entity;
 386         struct uvc_control_info *info;
 387
 388         __u8 index;     /* Used to match the uvc_control entry with a
 389                            uvc_control_info. */
 390         __u8 dirty : 1,
 391              loaded : 1,
 392              modified : 1;
 393
 394         __u8 *data;
 395 };
 396
 397 struct uvc_format_desc {
 398         char *name;
 399         __u8 guid[16];
 400         __u32 fcc;
 401 };
 402
 403 /* The term 'entity' refers to both UVC units and UVC terminals.
 404  *
 405  * The type field is either the terminal type (wTerminalType in the terminal
 406  * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor).
 407  * As the bDescriptorSubtype field is one byte long, the type value will
 408  * always have a null MSB for units. All terminal types defined by the UVC
 409  * specification have a non-null MSB, so it is safe to use the MSB to
 410  * differentiate between units and terminals as long as the descriptor parsing
 411  * code makes sure terminal types have a non-null MSB.
 412  *
 413  * For terminals, the type's most significant bit stores the terminal
 414  * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should
 415  * always be accessed with the UVC_ENTITY_* macros and never directly.
 416  */
 417
 418 struct uvc_entity {
 419         struct list_head list;          /* Entity as part of a UVC device. */
 420         struct list_head chain;         /* Entity as part of a video device
 421                                          * chain. */
 422         __u8 id;
 423         __u16 type;
 424         char name[64];
 425
 426         union {
 427                 struct {
 428                         __u16 wObjectiveFocalLengthMin;
 429                         __u16 wObjectiveFocalLengthMax;
 430                         __u16 wOcularFocalLength;
 431                         __u8  bControlSize;
 432                         __u8  *bmControls;
 433                 } camera;
 434
 435                 struct {
 436                         __u8  bControlSize;
 437                         __u8  *bmControls;
 438                         __u8  bTransportModeSize;
 439                         __u8  *bmTransportModes;
 440                 } media;
 441
 442                 struct {
 443                         __u8  bSourceID;
 444                 } output;
 445
 446                 struct {
 447                         __u8  bSourceID;
 448                         __u16 wMaxMultiplier;
 449                         __u8  bControlSize;
 450                         __u8  *bmControls;
 451                         __u8  bmVideoStandards;
 452                 } processing;
 453
 454                 struct {
 455                         __u8  bNrInPins;
 456                         __u8  *baSourceID;
 457                 } selector;
 458
 459                 struct {
 460                         __u8  guidExtensionCode[16];
 461                         __u8  bNumControls;
 462                         __u8  bNrInPins;
 463                         __u8  *baSourceID;
 464                         __u8  bControlSize;
 465                         __u8  *bmControls;
 466                         __u8  *bmControlsType;
 467                 } extension;
 468         };
 469
 470         unsigned int ncontrols;
 471         struct uvc_control *controls;
 472 };
 473
 474 struct uvc_frame {
 475         __u8  bFrameIndex;
 476         __u8  bmCapabilities;
 477         __u16 wWidth;
 478         __u16 wHeight;
 479         __u32 dwMinBitRate;
 480         __u32 dwMaxBitRate;
 481         __u32 dwMaxVideoFrameBufferSize;
 482         __u8  bFrameIntervalType;
 483         __u32 dwDefaultFrameInterval;
 484         __u32 *dwFrameInterval;
 485 };
 486
 487 struct uvc_format {
 488         __u8 type;
 489         __u8 index;
 490         __u8 bpp;
 491         __u8 colorspace;
 492         __u32 fcc;
 493         __u32 flags;
 494
 495         char name[32];
 496
 497         unsigned int nframes;
 498         struct uvc_frame *frame;
 499 };
 500
 501 struct uvc_streaming_header {
 502         __u8 bNumFormats;
 503         __u8 bEndpointAddress;
 504         __u8 bTerminalLink;
 505         __u8 bControlSize;
 506         __u8 *bmaControls;
 507         /* The following fields are used by input headers only. */
 508         __u8 bmInfo;
 509         __u8 bStillCaptureMethod;
 510         __u8 bTriggerSupport;
 511         __u8 bTriggerUsage;
 512 };
 513
 514 struct uvc_streaming {
 515         struct list_head list;
 516
 517         struct usb_interface *intf;
 518         int intfnum;
 519         __u16 maxpsize;
 520
 521         struct uvc_streaming_header header;
 522         enum v4l2_buf_type type;
 523
 524         unsigned int nformats;
 525         struct uvc_format *format;
 526
 527         struct uvc_streaming_control ctrl;
 528         struct uvc_format *cur_format;
 529         struct uvc_frame *cur_frame;
 530
 531         struct mutex mutex;
 532 };
 533
 534 enum uvc_buffer_state {
 535         UVC_BUF_STATE_IDLE      = 0,
 536         UVC_BUF_STATE_QUEUED    = 1,
 537         UVC_BUF_STATE_ACTIVE    = 2,
 538         UVC_BUF_STATE_DONE      = 3,
 539         UVC_BUF_STATE_ERROR     = 4,
 540 };
 541
 542 struct uvc_buffer {
 543         unsigned long vma_use_count;
 544         struct list_head stream;
 545
 546         /* Touched by interrupt handler. */
 547         struct v4l2_buffer buf;
 548         struct list_head queue;
 549         wait_queue_head_t wait;
 550         enum uvc_buffer_state state;
 551 };
 552
 553 #define UVC_QUEUE_STREAMING             (1 << 0)
 554 #define UVC_QUEUE_DISCONNECTED          (1 << 1)
 555 #define UVC_QUEUE_DROP_INCOMPLETE       (1 << 2)
 556
 557 struct uvc_video_queue {
 558         enum v4l2_buf_type type;
 559
 560         void *mem;
 561         unsigned int flags;
 562         __u32 sequence;
 563
 564         unsigned int count;
 565         unsigned int buf_size;
 566         unsigned int buf_used;
 567         struct uvc_buffer buffer[UVC_MAX_VIDEO_BUFFERS];
 568         struct mutex mutex;     /* protects buffers and mainqueue */
 569         spinlock_t irqlock;     /* protects irqqueue */
 570
 571         struct list_head mainqueue;
 572         struct list_head irqqueue;
 573 };
 574
 575 struct uvc_video_device {
 576         struct uvc_device *dev;
 577         struct video_device *vdev;
 578         atomic_t active;
 579         unsigned int frozen : 1;
 580
 581         struct list_head iterms;                /* Input terminals */
 582         struct uvc_entity *oterm;               /* Output terminal */
 583         struct uvc_entity *sterm;               /* USB streaming terminal */
 584         struct uvc_entity *processing;
 585         struct uvc_entity *selector;
 586         struct list_head extensions;
 587         struct mutex ctrl_mutex;
 588
 589         struct uvc_video_queue queue;
 590
 591         /* Video streaming object, must always be non-NULL. */
 592         struct uvc_streaming *streaming;
 593
 594         void (*decode) (struct urb *urb, struct uvc_video_device *video,
 595                         struct uvc_buffer *buf);
 596
 597         /* Context data used by the bulk completion handler. */
 598         struct {
 599                 __u8 header[256];
 600                 unsigned int header_size;
 601                 int skip_payload;
 602                 __u32 payload_size;
 603                 __u32 max_payload_size;
 604         } bulk;
 605
 606         struct urb *urb[UVC_URBS];
 607         char *urb_buffer[UVC_URBS];
 608         dma_addr_t urb_dma[UVC_URBS];
 609         unsigned int urb_size;
 610
 611         __u8 last_fid;
 612 };
 613
 614 enum uvc_device_state {
 615         UVC_DEV_DISCONNECTED = 1,
 616 };
 617
 618 struct uvc_device {
 619         struct usb_device *udev;
 620         struct usb_interface *intf;
 621         unsigned long warnings;
 622         __u32 quirks;
 623         int intfnum;
 624         char name[32];
 625
 626         enum uvc_device_state state;
 627         struct kref kref;
 628         struct list_head list;
 629         atomic_t users;
 630
 631         /* Video control interface */
 632         __u16 uvc_version;
 633         __u32 clock_frequency;
 634
 635         struct list_head entities;
 636
 637         struct uvc_video_device video;
 638
 639         /* Status Interrupt Endpoint */
 640         struct usb_host_endpoint *int_ep;
 641         struct urb *int_urb;
 642         __u8 *status;
 643         struct input_dev *input;
 644         char input_phys[64];
 645
 646         /* Video Streaming interfaces */
 647         struct list_head streaming;
 648 };
 649
 650 enum uvc_handle_state {
 651         UVC_HANDLE_PASSIVE      = 0,
 652         UVC_HANDLE_ACTIVE       = 1,
 653 };
 654
 655 struct uvc_fh {
 656         struct uvc_video_device *device;
 657         enum uvc_handle_state state;
 658 };
 659
 660 struct uvc_driver {
 661         struct usb_driver driver;
 662
 663         struct mutex open_mutex;        /* protects from open/disconnect race */
 664
 665         struct list_head devices;       /* struct uvc_device list */
 666         struct list_head controls;      /* struct uvc_control_info list */
 667         struct mutex ctrl_mutex;        /* protects controls and devices
 668                                            lists */
 669 };
 670
 671 /* ------------------------------------------------------------------------
 672  * Debugging, printing and logging
 673  */
 674
 675 #define UVC_TRACE_PROBE         (1 << 0)
 676 #define UVC_TRACE_DESCR         (1 << 1)
 677 #define UVC_TRACE_CONTROL       (1 << 2)
 678 #define UVC_TRACE_FORMAT        (1 << 3)
 679 #define UVC_TRACE_CAPTURE       (1 << 4)
 680 #define UVC_TRACE_CALLS         (1 << 5)
 681 #define UVC_TRACE_IOCTL         (1 << 6)
 682 #define UVC_TRACE_FRAME         (1 << 7)
 683 #define UVC_TRACE_SUSPEND       (1 << 8)
 684 #define UVC_TRACE_STATUS        (1 << 9)
 685
 686 #define UVC_WARN_MINMAX         0
 687 #define UVC_WARN_PROBE_DEF      1
 688
 689 extern unsigned int uvc_no_drop_param;
 690 extern unsigned int uvc_trace_param;
 691
 692 #define uvc_trace(flag, msg...) \
 693         do { \
 694                 if (uvc_trace_param & flag) \
 695                         printk(KERN_DEBUG "uvcvideo: " msg); \
 696         } while (0)
 697
 698 #define uvc_warn_once(dev, warn, msg...) \
 699         do { \
 700                 if (!test_and_set_bit(warn, &dev->warnings)) \
 701                         printk(KERN_INFO "uvcvideo: " msg); \
 702         } while (0)
 703
 704 #define uvc_printk(level, msg...) \
 705         printk(level "uvcvideo: " msg)
 706
 707 #define UVC_GUID_FORMAT "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-" \
 708                         "%02x%02x%02x%02x%02x%02x"
 709 #define UVC_GUID_ARGS(guid) \
 710         (guid)[3],  (guid)[2],  (guid)[1],  (guid)[0], \
 711         (guid)[5],  (guid)[4], \
 712         (guid)[7],  (guid)[6], \
 713         (guid)[8],  (guid)[9], \
 714         (guid)[10], (guid)[11], (guid)[12], \
 715         (guid)[13], (guid)[14], (guid)[15]
 716
 717 /* --------------------------------------------------------------------------
 718  * Internal functions.
 719  */
 720
 721 /* Core driver */
 722 extern struct uvc_driver uvc_driver;
 723 extern void uvc_delete(struct kref *kref);
 724
 725 /* Video buffers queue management. */
 726 extern void uvc_queue_init(struct uvc_video_queue *queue,
 727                 enum v4l2_buf_type type);
 728 extern int uvc_alloc_buffers(struct uvc_video_queue *queue,
 729                 unsigned int nbuffers, unsigned int buflength);
 730 extern int uvc_free_buffers(struct uvc_video_queue *queue);
 731 extern int uvc_query_buffer(struct uvc_video_queue *queue,
 732                 struct v4l2_buffer *v4l2_buf);
 733 extern int uvc_queue_buffer(struct uvc_video_queue *queue,
 734                 struct v4l2_buffer *v4l2_buf);
 735 extern int uvc_dequeue_buffer(struct uvc_video_queue *queue,
 736                 struct v4l2_buffer *v4l2_buf, int nonblocking);
 737 extern int uvc_queue_enable(struct uvc_video_queue *queue, int enable);
 738 extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
 739 extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
 740                 struct uvc_buffer *buf);
 741 extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue,
 742                 struct file *file, poll_table *wait);
 743 extern int uvc_queue_allocated(struct uvc_video_queue *queue);
 744 static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
 745 {
 746         return queue->flags & UVC_QUEUE_STREAMING;
 747 }
 748
 749 /* V4L2 interface */
 750 extern const struct v4l2_file_operations uvc_fops;
 751
 752 /* Video */
 753 extern int uvc_video_init(struct uvc_video_device *video);
 754 extern int uvc_video_suspend(struct uvc_video_device *video);
 755 extern int uvc_video_resume(struct uvc_video_device *video);
 756 extern int uvc_video_enable(struct uvc_video_device *video, int enable);
 757 extern int uvc_probe_video(struct uvc_video_device *video,
 758                 struct uvc_streaming_control *probe);
 759 extern int uvc_commit_video(struct uvc_video_device *video,
 760                 struct uvc_streaming_control *ctrl);
 761 extern int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit,
 762                 __u8 intfnum, __u8 cs, void *data, __u16 size);
 763
 764 /* Status */
 765 extern int uvc_status_init(struct uvc_device *dev);
 766 extern void uvc_status_cleanup(struct uvc_device *dev);
 767 extern int uvc_status_start(struct uvc_device *dev);
 768 extern void uvc_status_stop(struct uvc_device *dev);
 769 extern int uvc_status_suspend(struct uvc_device *dev);
 770 extern int uvc_status_resume(struct uvc_device *dev);
 771
 772 /* Controls */
 773 extern struct uvc_control *uvc_find_control(struct uvc_video_device *video,
 774                 __u32 v4l2_id, struct uvc_control_mapping **mapping);
 775 extern int uvc_query_v4l2_ctrl(struct uvc_video_device *video,
 776                 struct v4l2_queryctrl *v4l2_ctrl);
 777
 778 extern int uvc_ctrl_add_info(struct uvc_control_info *info);
 779 extern int uvc_ctrl_add_mapping(struct uvc_control_mapping *mapping);
 780 extern int uvc_ctrl_init_device(struct uvc_device *dev);
 781 extern void uvc_ctrl_cleanup_device(struct uvc_device *dev);
 782 extern int uvc_ctrl_resume_device(struct uvc_device *dev);
 783 extern void uvc_ctrl_init(void);
 784
 785 extern int uvc_ctrl_begin(struct uvc_video_device *video);
 786 extern int __uvc_ctrl_commit(struct uvc_video_device *video, int rollback);
 787 static inline int uvc_ctrl_commit(struct uvc_video_device *video)
 788 {
 789         return __uvc_ctrl_commit(video, 0);
 790 }
 791 static inline int uvc_ctrl_rollback(struct uvc_video_device *video)
 792 {
 793         return __uvc_ctrl_commit(video, 1);
 794 }
 795
 796 extern int uvc_ctrl_get(struct uvc_video_device *video,
 797                 struct v4l2_ext_control *xctrl);
 798 extern int uvc_ctrl_set(struct uvc_video_device *video,
 799                 struct v4l2_ext_control *xctrl);
 800
 801 extern int uvc_xu_ctrl_query(struct uvc_video_device *video,
 802                 struct uvc_xu_control *ctrl, int set);
 803
 804 /* Utility functions */
 805 extern void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
 806                 unsigned int n_terms, unsigned int threshold);
 807 extern uint32_t uvc_fraction_to_interval(uint32_t numerator,
 808                 uint32_t denominator);
 809 extern struct usb_host_endpoint *uvc_find_endpoint(
 810                 struct usb_host_interface *alts, __u8 epaddr);
 811
 812 /* Quirks support */
 813 void uvc_video_decode_isight(struct urb *urb, struct uvc_video_device *video,
 814                 struct uvc_buffer *buf);
 815
 816 #endif /* __KERNEL__ */
 817
 818 #endif
 819