release/src-rt-6.x/linux/linux-2.6/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 /* Control is an extension unit control. */
  31 #define UVC_CONTROL_EXTENSION   (1 << 8)
  32
  33 #define UVC_CONTROL_GET_RANGE   (UVC_CONTROL_GET_CUR | UVC_CONTROL_GET_MIN | \
  34                                  UVC_CONTROL_GET_MAX | UVC_CONTROL_GET_RES | \
  35                                  UVC_CONTROL_GET_DEF)
  36
  37 struct uvc_xu_control_info {
  38         __u8 entity[16];
  39         __u8 index;
  40         __u8 selector;
  41         __u16 size;
  42         __u32 flags;
  43 };
  44
  45 struct uvc_menu_info {
  46         __u32 value;
  47         __u8 name[32];
  48 };
  49
  50 struct uvc_xu_control_mapping_old {
  51         __u8 reserved[64];
  52 };
  53
  54 struct uvc_xu_control_mapping {
  55         __u32 id;
  56         __u8 name[32];
  57         __u8 entity[16];
  58         __u8 selector;
  59
  60         __u8 size;
  61         __u8 offset;
  62         enum v4l2_ctrl_type v4l2_type;
  63         __u32 data_type;
  64
  65         struct uvc_menu_info __user *menu_info;
  66         __u32 menu_count;
  67
  68         __u32 reserved[4];
  69 };
  70
  71 struct uvc_xu_control {
  72         __u8 unit;
  73         __u8 selector;
  74         __u16 size;
  75         __u8 __user *data;
  76 };
  77
  78 #define UVCIOC_CTRL_ADD         _IOW('U', 1, struct uvc_xu_control_info)
  79 #define UVCIOC_CTRL_MAP_OLD     _IOWR('U', 2, struct uvc_xu_control_mapping_old)
  80 #define UVCIOC_CTRL_MAP         _IOWR('U', 2, struct uvc_xu_control_mapping)
  81 #define UVCIOC_CTRL_GET         _IOWR('U', 3, struct uvc_xu_control)
  82 #define UVCIOC_CTRL_SET         _IOW('U', 4, struct uvc_xu_control)
  83
  84 #ifdef __KERNEL__
  85
  86 #include <linux/poll.h>
  87 #include <linux/usb/video.h>
  88
  89 /* --------------------------------------------------------------------------
  90  * UVC constants
  91  */
  92
  93 #define UVC_TERM_INPUT                  0x0000
  94 #define UVC_TERM_OUTPUT                 0x8000
  95 #define UVC_TERM_DIRECTION(term)        ((term)->type & 0x8000)
  96
  97 #define UVC_ENTITY_TYPE(entity)         ((entity)->type & 0x7fff)
  98 #define UVC_ENTITY_IS_UNIT(entity)      (((entity)->type & 0xff00) == 0)
  99 #define UVC_ENTITY_IS_TERM(entity)      (((entity)->type & 0xff00) != 0)
 100 #define UVC_ENTITY_IS_ITERM(entity) \
 101         (UVC_ENTITY_IS_TERM(entity) && \
 102         ((entity)->type & 0x8000) == UVC_TERM_INPUT)
 103 #define UVC_ENTITY_IS_OTERM(entity) \
 104         (UVC_ENTITY_IS_TERM(entity) && \
 105         ((entity)->type & 0x8000) == UVC_TERM_OUTPUT)
 106
 107
 108 /* ------------------------------------------------------------------------
 109  * GUIDs
 110  */
 111 #define UVC_GUID_UVC_CAMERA \
 112         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 113          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}
 114 #define UVC_GUID_UVC_OUTPUT \
 115         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 116          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}
 117 #define UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT \
 118         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 119          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03}
 120 #define UVC_GUID_UVC_PROCESSING \
 121         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 122          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01}
 123 #define UVC_GUID_UVC_SELECTOR \
 124         {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
 125          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02}
 126
 127 #define UVC_GUID_FORMAT_MJPEG \
 128         { 'M',  'J',  'P',  'G', 0x00, 0x00, 0x10, 0x00, \
 129          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 130 #define UVC_GUID_FORMAT_YUY2 \
 131         { 'Y',  'U',  'Y',  '2', 0x00, 0x00, 0x10, 0x00, \
 132          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 133 #define UVC_GUID_FORMAT_YUY2_ISIGHT \
 134         { 'Y',  'U',  'Y',  '2', 0x00, 0x00, 0x10, 0x00, \
 135          0x80, 0x00, 0x00, 0x00, 0x00, 0x38, 0x9b, 0x71}
 136 #define UVC_GUID_FORMAT_NV12 \
 137         { 'N',  'V',  '1',  '2', 0x00, 0x00, 0x10, 0x00, \
 138          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 139 #define UVC_GUID_FORMAT_YV12 \
 140         { 'Y',  'V',  '1',  '2', 0x00, 0x00, 0x10, 0x00, \
 141          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 142 #define UVC_GUID_FORMAT_I420 \
 143         { 'I',  '4',  '2',  '0', 0x00, 0x00, 0x10, 0x00, \
 144          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 145 #define UVC_GUID_FORMAT_UYVY \
 146         { 'U',  'Y',  'V',  'Y', 0x00, 0x00, 0x10, 0x00, \
 147          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 148 #define UVC_GUID_FORMAT_Y800 \
 149         { 'Y',  '8',  '0',  '0', 0x00, 0x00, 0x10, 0x00, \
 150          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 151 #define UVC_GUID_FORMAT_Y16 \
 152         { 'Y',  '1',  '6',  ' ', 0x00, 0x00, 0x10, 0x00, \
 153          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 154 #define UVC_GUID_FORMAT_BY8 \
 155         { 'B',  'Y',  '8',  ' ', 0x00, 0x00, 0x10, 0x00, \
 156          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 157 #define UVC_GUID_FORMAT_RGBP \
 158         { 'R',  'G',  'B',  'P', 0x00, 0x00, 0x10, 0x00, \
 159          0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
 160
 161 /* ------------------------------------------------------------------------
 162  * Driver specific constants.
 163  */
 164
 165 #define DRIVER_VERSION_NUMBER   KERNEL_VERSION(0, 1, 0)
 166
 167 /* Number of isochronous URBs. */
 168 #define UVC_URBS                5
 169 /* Maximum number of packets per URB. */
 170 #define UVC_MAX_PACKETS         32
 171 /* Maximum number of video buffers. */
 172 #define UVC_MAX_VIDEO_BUFFERS   32
 173 /* Maximum status buffer size in bytes of interrupt URB. */
 174 #define UVC_MAX_STATUS_SIZE     16
 175
 176 #define UVC_CTRL_CONTROL_TIMEOUT        300
 177 #define UVC_CTRL_STREAMING_TIMEOUT      5000
 178
 179 /* Devices quirks */
 180 #define UVC_QUIRK_STATUS_INTERVAL       0x00000001
 181 #define UVC_QUIRK_PROBE_MINMAX          0x00000002
 182 #define UVC_QUIRK_PROBE_EXTRAFIELDS     0x00000004
 183 #define UVC_QUIRK_BUILTIN_ISIGHT        0x00000008
 184 #define UVC_QUIRK_STREAM_NO_FID         0x00000010
 185 #define UVC_QUIRK_IGNORE_SELECTOR_UNIT  0x00000020
 186 #define UVC_QUIRK_FIX_BANDWIDTH         0x00000080
 187 #define UVC_QUIRK_PROBE_DEF             0x00000100
 188
 189 /* Format flags */
 190 #define UVC_FMT_FLAG_COMPRESSED         0x00000001
 191 #define UVC_FMT_FLAG_STREAM             0x00000002
 192
 193 /* ------------------------------------------------------------------------
 194  * Structures.
 195  */
 196
 197 struct uvc_device;
 198
 199 /* TODO: Put the most frequently accessed fields at the beginning of
 200  * structures to maximize cache efficiency.
 201  */
 202 struct uvc_control_info {
 203         struct list_head list;
 204         struct list_head mappings;
 205
 206         __u8 entity[16];
 207         __u8 index;
 208         __u8 selector;
 209
 210         __u16 size;
 211         __u32 flags;
 212 };
 213
 214 struct uvc_control_mapping {
 215         struct list_head list;
 216
 217         struct uvc_control_info *ctrl;
 218
 219         __u32 id;
 220         __u8 name[32];
 221         __u8 entity[16];
 222         __u8 selector;
 223
 224         __u8 size;
 225         __u8 offset;
 226         enum v4l2_ctrl_type v4l2_type;
 227         __u32 data_type;
 228
 229         struct uvc_menu_info *menu_info;
 230         __u32 menu_count;
 231
 232         __s32 (*get) (struct uvc_control_mapping *mapping, __u8 query,
 233                       const __u8 *data);
 234         void (*set) (struct uvc_control_mapping *mapping, __s32 value,
 235                      __u8 *data);
 236 };
 237
 238 struct uvc_control {
 239         struct uvc_entity *entity;
 240         struct uvc_control_info *info;
 241
 242         __u8 index;     /* Used to match the uvc_control entry with a
 243                            uvc_control_info. */
 244         __u8 dirty : 1,
 245              loaded : 1,
 246              modified : 1,
 247              cached : 1;
 248
 249         __u8 *uvc_data;
 250         __u8 *uvc_info;
 251 };
 252
 253 struct uvc_format_desc {
 254         char *name;
 255         __u8 guid[16];
 256         __u32 fcc;
 257 };
 258
 259 /* The term 'entity' refers to both UVC units and UVC terminals.
 260  *
 261  * The type field is either the terminal type (wTerminalType in the terminal
 262  * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor).
 263  * As the bDescriptorSubtype field is one byte long, the type value will
 264  * always have a null MSB for units. All terminal types defined by the UVC
 265  * specification have a non-null MSB, so it is safe to use the MSB to
 266  * differentiate between units and terminals as long as the descriptor parsing
 267  * code makes sure terminal types have a non-null MSB.
 268  *
 269  * For terminals, the type's most significant bit stores the terminal
 270  * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should
 271  * always be accessed with the UVC_ENTITY_* macros and never directly.
 272  */
 273
 274 struct uvc_entity {
 275         struct list_head list;          /* Entity as part of a UVC device. */
 276         struct list_head chain;         /* Entity as part of a video device
 277                                          * chain. */
 278         __u8 id;
 279         __u16 type;
 280         char name[64];
 281
 282         union {
 283                 struct {
 284                         __u16 wObjectiveFocalLengthMin;
 285                         __u16 wObjectiveFocalLengthMax;
 286                         __u16 wOcularFocalLength;
 287                         __u8  bControlSize;
 288                         __u8  *bmControls;
 289                 } camera;
 290
 291                 struct {
 292                         __u8  bControlSize;
 293                         __u8  *bmControls;
 294                         __u8  bTransportModeSize;
 295                         __u8  *bmTransportModes;
 296                 } media;
 297
 298                 struct {
 299                 } output;
 300
 301                 struct {
 302                         __u16 wMaxMultiplier;
 303                         __u8  bControlSize;
 304                         __u8  *bmControls;
 305                         __u8  bmVideoStandards;
 306                 } processing;
 307
 308                 struct {
 309                 } selector;
 310
 311                 struct {
 312                         __u8  guidExtensionCode[16];
 313                         __u8  bNumControls;
 314                         __u8  bControlSize;
 315                         __u8  *bmControls;
 316                         __u8  *bmControlsType;
 317                 } extension;
 318         };
 319
 320         __u8 bNrInPins;
 321         __u8 *baSourceID;
 322
 323         unsigned int ncontrols;
 324         struct uvc_control *controls;
 325 };
 326
 327 struct uvc_frame {
 328         __u8  bFrameIndex;
 329         __u8  bmCapabilities;
 330         __u16 wWidth;
 331         __u16 wHeight;
 332         __u32 dwMinBitRate;
 333         __u32 dwMaxBitRate;
 334         __u32 dwMaxVideoFrameBufferSize;
 335         __u8  bFrameIntervalType;
 336         __u32 dwDefaultFrameInterval;
 337         __u32 *dwFrameInterval;
 338 };
 339
 340 struct uvc_format {
 341         __u8 type;
 342         __u8 index;
 343         __u8 bpp;
 344         __u8 colorspace;
 345         __u32 fcc;
 346         __u32 flags;
 347
 348         char name[32];
 349
 350         unsigned int nframes;
 351         struct uvc_frame *frame;
 352 };
 353
 354 struct uvc_streaming_header {
 355         __u8 bNumFormats;
 356         __u8 bEndpointAddress;
 357         __u8 bTerminalLink;
 358         __u8 bControlSize;
 359         __u8 *bmaControls;
 360         /* The following fields are used by input headers only. */
 361         __u8 bmInfo;
 362         __u8 bStillCaptureMethod;
 363         __u8 bTriggerSupport;
 364         __u8 bTriggerUsage;
 365 };
 366
 367 enum uvc_buffer_state {
 368         UVC_BUF_STATE_IDLE      = 0,
 369         UVC_BUF_STATE_QUEUED    = 1,
 370         UVC_BUF_STATE_ACTIVE    = 2,
 371         UVC_BUF_STATE_READY     = 3,
 372         UVC_BUF_STATE_DONE      = 4,
 373         UVC_BUF_STATE_ERROR     = 5,
 374 };
 375
 376 struct uvc_buffer {
 377         unsigned long vma_use_count;
 378         struct list_head stream;
 379
 380         /* Touched by interrupt handler. */
 381         struct v4l2_buffer buf;
 382         struct list_head queue;
 383         wait_queue_head_t wait;
 384         enum uvc_buffer_state state;
 385         unsigned int error;
 386 };
 387
 388 #define UVC_QUEUE_STREAMING             (1 << 0)
 389 #define UVC_QUEUE_DISCONNECTED          (1 << 1)
 390 #define UVC_QUEUE_DROP_CORRUPTED        (1 << 2)
 391
 392 struct uvc_video_queue {
 393         enum v4l2_buf_type type;
 394
 395         void *mem;
 396         unsigned int flags;
 397         __u32 sequence;
 398
 399         unsigned int count;
 400         unsigned int buf_size;
 401         unsigned int buf_used;
 402         struct uvc_buffer buffer[UVC_MAX_VIDEO_BUFFERS];
 403         struct mutex mutex;     /* protects buffers and mainqueue */
 404         spinlock_t irqlock;     /* protects irqqueue */
 405
 406         struct list_head mainqueue;
 407         struct list_head irqqueue;
 408 };
 409
 410 struct uvc_video_chain {
 411         struct uvc_device *dev;
 412         struct list_head list;
 413
 414         struct list_head entities;              /* All entities */
 415         struct uvc_entity *processing;          /* Processing unit */
 416         struct uvc_entity *selector;            /* Selector unit */
 417
 418         struct mutex ctrl_mutex;
 419 };
 420
 421 struct uvc_streaming {
 422         struct list_head list;
 423         struct uvc_device *dev;
 424         struct video_device *vdev;
 425         struct uvc_video_chain *chain;
 426         atomic_t active;
 427
 428         struct usb_interface *intf;
 429         int intfnum;
 430         __u16 maxpsize;
 431
 432         struct uvc_streaming_header header;
 433         enum v4l2_buf_type type;
 434
 435         unsigned int nformats;
 436         struct uvc_format *format;
 437
 438         struct uvc_streaming_control ctrl;
 439         struct uvc_format *cur_format;
 440         struct uvc_frame *cur_frame;
 441
 442         struct mutex mutex;
 443
 444         unsigned int frozen : 1;
 445         struct uvc_video_queue queue;
 446         void (*decode) (struct urb *urb, struct uvc_streaming *video,
 447                         struct uvc_buffer *buf);
 448
 449         /* Context data used by the bulk completion handler. */
 450         struct {
 451                 __u8 header[256];
 452                 unsigned int header_size;
 453                 int skip_payload;
 454                 __u32 payload_size;
 455                 __u32 max_payload_size;
 456         } bulk;
 457
 458         struct urb *urb[UVC_URBS];
 459         char *urb_buffer[UVC_URBS];
 460         dma_addr_t urb_dma[UVC_URBS];
 461         unsigned int urb_size;
 462
 463         __u8 last_fid;
 464 };
 465
 466 enum uvc_device_state {
 467         UVC_DEV_DISCONNECTED = 1,
 468 };
 469
 470 struct uvc_device {
 471         struct usb_device *udev;
 472         struct usb_interface *intf;
 473         unsigned long warnings;
 474         __u32 quirks;
 475         int intfnum;
 476         char name[32];
 477
 478         enum uvc_device_state state;
 479         struct list_head list;
 480         atomic_t users;
 481
 482         /* Video control interface */
 483         __u16 uvc_version;
 484         __u32 clock_frequency;
 485
 486         struct list_head entities;
 487         struct list_head chains;
 488
 489         /* Video Streaming interfaces */
 490         struct list_head streams;
 491         atomic_t nstreams;
 492
 493         /* Status Interrupt Endpoint */
 494         struct usb_host_endpoint *int_ep;
 495         struct urb *int_urb;
 496         __u8 *status;
 497         struct input_dev *input;
 498         char input_phys[64];
 499 };
 500
 501 enum uvc_handle_state {
 502         UVC_HANDLE_PASSIVE      = 0,
 503         UVC_HANDLE_ACTIVE       = 1,
 504 };
 505
 506 struct uvc_fh {
 507         struct uvc_video_chain *chain;
 508         struct uvc_streaming *stream;
 509         enum uvc_handle_state state;
 510 };
 511
 512 struct uvc_driver {
 513         struct usb_driver driver;
 514
 515         struct list_head devices;       /* struct uvc_device list */
 516         struct list_head controls;      /* struct uvc_control_info list */
 517         struct mutex ctrl_mutex;        /* protects controls and devices
 518                                            lists */
 519 };
 520
 521 /* ------------------------------------------------------------------------
 522  * Debugging, printing and logging
 523  */
 524
 525 #define UVC_TRACE_PROBE         (1 << 0)
 526 #define UVC_TRACE_DESCR         (1 << 1)
 527 #define UVC_TRACE_CONTROL       (1 << 2)
 528 #define UVC_TRACE_FORMAT        (1 << 3)
 529 #define UVC_TRACE_CAPTURE       (1 << 4)
 530 #define UVC_TRACE_CALLS         (1 << 5)
 531 #define UVC_TRACE_IOCTL         (1 << 6)
 532 #define UVC_TRACE_FRAME         (1 << 7)
 533 #define UVC_TRACE_SUSPEND       (1 << 8)
 534 #define UVC_TRACE_STATUS        (1 << 9)
 535 #define UVC_TRACE_VIDEO         (1 << 10)
 536
 537 #define UVC_WARN_MINMAX         0
 538 #define UVC_WARN_PROBE_DEF      1
 539
 540 extern unsigned int uvc_clock_param;
 541 extern unsigned int uvc_no_drop_param;
 542 extern unsigned int uvc_trace_param;
 543 extern unsigned int uvc_timeout_param;
 544
 545 #define uvc_trace(flag, msg...) \
 546         do { \
 547                 if (uvc_trace_param & flag) \
 548                         printk(KERN_DEBUG "uvcvideo: " msg); \
 549         } while (0)
 550
 551 #define uvc_warn_once(dev, warn, msg...) \
 552         do { \
 553                 if (!test_and_set_bit(warn, &dev->warnings)) \
 554                         printk(KERN_INFO "uvcvideo: " msg); \
 555         } while (0)
 556
 557 #define uvc_printk(level, msg...) \
 558         printk(level "uvcvideo: " msg)
 559
 560 /* --------------------------------------------------------------------------
 561  * Internal functions.
 562  */
 563
 564 /* Core driver */
 565 extern struct uvc_driver uvc_driver;
 566
 567 /* Video buffers queue management. */
 568 extern void uvc_queue_init(struct uvc_video_queue *queue,
 569                 enum v4l2_buf_type type, int drop_corrupted);
 570 extern int uvc_alloc_buffers(struct uvc_video_queue *queue,
 571                 unsigned int nbuffers, unsigned int buflength);
 572 extern int uvc_free_buffers(struct uvc_video_queue *queue);
 573 extern int uvc_query_buffer(struct uvc_video_queue *queue,
 574                 struct v4l2_buffer *v4l2_buf);
 575 extern int uvc_queue_buffer(struct uvc_video_queue *queue,
 576                 struct v4l2_buffer *v4l2_buf);
 577 extern int uvc_dequeue_buffer(struct uvc_video_queue *queue,
 578                 struct v4l2_buffer *v4l2_buf, int nonblocking);
 579 extern int uvc_queue_enable(struct uvc_video_queue *queue, int enable);
 580 extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect);
 581 extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
 582                 struct uvc_buffer *buf);
 583 extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue,
 584                 struct file *file, poll_table *wait);
 585 extern int uvc_queue_allocated(struct uvc_video_queue *queue);
 586 static inline int uvc_queue_streaming(struct uvc_video_queue *queue)
 587 {
 588         return queue->flags & UVC_QUEUE_STREAMING;
 589 }
 590
 591 /* V4L2 interface */
 592 extern const struct v4l2_file_operations uvc_fops;
 593
 594 /* Video */
 595 extern int uvc_video_init(struct uvc_streaming *stream);
 596 extern int uvc_video_suspend(struct uvc_streaming *stream);
 597 extern int uvc_video_resume(struct uvc_streaming *stream);
 598 extern int uvc_video_enable(struct uvc_streaming *stream, int enable);
 599 extern int uvc_probe_video(struct uvc_streaming *stream,
 600                 struct uvc_streaming_control *probe);
 601 extern int uvc_commit_video(struct uvc_streaming *stream,
 602                 struct uvc_streaming_control *ctrl);
 603 extern int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit,
 604                 __u8 intfnum, __u8 cs, void *data, __u16 size);
 605
 606 /* Status */
 607 extern int uvc_status_init(struct uvc_device *dev);
 608 extern void uvc_status_cleanup(struct uvc_device *dev);
 609 extern int uvc_status_start(struct uvc_device *dev);
 610 extern void uvc_status_stop(struct uvc_device *dev);
 611 extern int uvc_status_suspend(struct uvc_device *dev);
 612 extern int uvc_status_resume(struct uvc_device *dev);
 613
 614 /* Controls */
 615 extern struct uvc_control *uvc_find_control(struct uvc_video_chain *chain,
 616                 __u32 v4l2_id, struct uvc_control_mapping **mapping);
 617 extern int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
 618                 struct v4l2_queryctrl *v4l2_ctrl);
 619
 620 extern int uvc_ctrl_add_info(struct uvc_control_info *info);
 621 extern int uvc_ctrl_add_mapping(struct uvc_control_mapping *mapping);
 622 extern int uvc_ctrl_init_device(struct uvc_device *dev);
 623 extern void uvc_ctrl_cleanup_device(struct uvc_device *dev);
 624 extern int uvc_ctrl_resume_device(struct uvc_device *dev);
 625 extern void uvc_ctrl_init(void);
 626 extern void uvc_ctrl_cleanup(void);
 627
 628 extern int uvc_ctrl_begin(struct uvc_video_chain *chain);
 629 extern int __uvc_ctrl_commit(struct uvc_video_chain *chain, int rollback);
 630 static inline int uvc_ctrl_commit(struct uvc_video_chain *chain)
 631 {
 632         return __uvc_ctrl_commit(chain, 0);
 633 }
 634 static inline int uvc_ctrl_rollback(struct uvc_video_chain *chain)
 635 {
 636         return __uvc_ctrl_commit(chain, 1);
 637 }
 638
 639 extern int uvc_ctrl_get(struct uvc_video_chain *chain,
 640                 struct v4l2_ext_control *xctrl);
 641 extern int uvc_ctrl_set(struct uvc_video_chain *chain,
 642                 struct v4l2_ext_control *xctrl);
 643
 644 extern int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
 645                 struct uvc_xu_control *ctrl, int set);
 646
 647 /* Utility functions */
 648 extern void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
 649                 unsigned int n_terms, unsigned int threshold);
 650 extern uint32_t uvc_fraction_to_interval(uint32_t numerator,
 651                 uint32_t denominator);
 652 extern struct usb_host_endpoint *uvc_find_endpoint(
 653                 struct usb_host_interface *alts, __u8 epaddr);
 654
 655 /* Quirks support */
 656 void uvc_video_decode_isight(struct urb *urb, struct uvc_streaming *stream,
 657                 struct uvc_buffer *buf);
 658
 659 #endif /* __KERNEL__ */
 660
 661 #endif
 662