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} 167 168 169 /* ------------------------------------------------------------------------ 170 * Driver specific constants. 171 */ 172 173 #define DRIVER_VERSION "1.1.1" 174 175 /* Number of isochronous URBs. */ 176 #define UVC_URBS 5 177 /* Maximum number of packets per URB. */ 178 #define UVC_MAX_PACKETS 32 179 /* Maximum status buffer size in bytes of interrupt URB. */ 180 #define UVC_MAX_STATUS_SIZE 16 181 182 #define UVC_CTRL_CONTROL_TIMEOUT 500 183 #define UVC_CTRL_STREAMING_TIMEOUT 5000 184 185 /* Maximum allowed number of control mappings per device */ 186 #define UVC_MAX_CONTROL_MAPPINGS 1024 187 #define UVC_MAX_CONTROL_MENU_ENTRIES 32 188 189 /* Devices quirks */ 190 #define UVC_QUIRK_STATUS_INTERVAL 0x00000001 191 #define UVC_QUIRK_PROBE_MINMAX 0x00000002 192 #define UVC_QUIRK_PROBE_EXTRAFIELDS 0x00000004 193 #define UVC_QUIRK_BUILTIN_ISIGHT 0x00000008 194 #define UVC_QUIRK_STREAM_NO_FID 0x00000010 195 #define UVC_QUIRK_IGNORE_SELECTOR_UNIT 0x00000020 196 #define UVC_QUIRK_FIX_BANDWIDTH 0x00000080 197 #define UVC_QUIRK_PROBE_DEF 0x00000100 198 #define UVC_QUIRK_RESTRICT_FRAME_RATE 0x00000200 199 #define UVC_QUIRK_RESTORE_CTRLS_ON_INIT 0x00000400 200 #define UVC_QUIRK_FORCE_Y8 0x00000800 201 202 /* Format flags */ 203 #define UVC_FMT_FLAG_COMPRESSED 0x00000001 204 #define UVC_FMT_FLAG_STREAM 0x00000002 205 206 /* ------------------------------------------------------------------------ 207 * Structures. 208 */ 209 210 struct uvc_device; 211 212 /* TODO: Put the most frequently accessed fields at the beginning of 213 * structures to maximize cache efficiency. 214 */ 215 struct uvc_control_info { 216 struct list_head mappings; 217 218 u8 entity[16]; 219 u8 index; /* Bit index in bmControls */ 220 u8 selector; 221 222 u16 size; 223 u32 flags; 224 }; 225 226 struct uvc_control_mapping { 227 struct list_head list; 228 struct list_head ev_subs; 229 230 u32 id; 231 u8 name[32]; 232 u8 entity[16]; 233 u8 selector; 234 235 u8 size; 236 u8 offset; 237 enum v4l2_ctrl_type v4l2_type; 238 u32 data_type; 239 240 const struct uvc_menu_info *menu_info; 241 u32 menu_count; 242 243 u32 master_id; 244 s32 master_manual; 245 u32 slave_ids[2]; 246 247 s32 (*get)(struct uvc_control_mapping *mapping, u8 query, 248 const u8 *data); 249 void (*set)(struct uvc_control_mapping *mapping, s32 value, 250 u8 *data); 251 }; 252 253 struct uvc_control { 254 struct uvc_entity *entity; 255 struct uvc_control_info info; 256 257 u8 index; /* Used to match the uvc_control entry with a 258 uvc_control_info. */ 259 u8 dirty:1, 260 loaded:1, 261 modified:1, 262 cached:1, 263 initialized:1; 264 265 u8 *uvc_data; 266 267 struct uvc_fh *handle; /* File handle that last changed the control. */ 268 }; 269 270 struct uvc_format_desc { 271 char *name; 272 u8 guid[16]; 273 u32 fcc; 274 }; 275 276 /* The term 'entity' refers to both UVC units and UVC terminals. 277 * 278 * The type field is either the terminal type (wTerminalType in the terminal 279 * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor). 280 * As the bDescriptorSubtype field is one byte long, the type value will 281 * always have a null MSB for units. All terminal types defined by the UVC 282 * specification have a non-null MSB, so it is safe to use the MSB to 283 * differentiate between units and terminals as long as the descriptor parsing 284 * code makes sure terminal types have a non-null MSB. 285 * 286 * For terminals, the type's most significant bit stores the terminal 287 * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should 288 * always be accessed with the UVC_ENTITY_* macros and never directly. 289 */ 290 291 #define UVC_ENTITY_FLAG_DEFAULT (1 << 0) 292 293 struct uvc_entity { 294 struct list_head list; /* Entity as part of a UVC device. */ 295 struct list_head chain; /* Entity as part of a video device 296 * chain. */ 297 unsigned int flags; 298 299 u8 id; 300 u16 type; 301 char name[64]; 302 303 /* Media controller-related fields. */ 304 struct video_device *vdev; 305 struct v4l2_subdev subdev; 306 unsigned int num_pads; 307 unsigned int num_links; 308 struct media_pad *pads; 309 310 union { 311 struct { 312 u16 wObjectiveFocalLengthMin; 313 u16 wObjectiveFocalLengthMax; 314 u16 wOcularFocalLength; 315 u8 bControlSize; 316 u8 *bmControls; 317 } camera; 318 319 struct { 320 u8 bControlSize; 321 u8 *bmControls; 322 u8 bTransportModeSize; 323 u8 *bmTransportModes; 324 } media; 325 326 struct { 327 } output; 328 329 struct { 330 u16 wMaxMultiplier; 331 u8 bControlSize; 332 u8 *bmControls; 333 u8 bmVideoStandards; 334 } processing; 335 336 struct { 337 } selector; 338 339 struct { 340 u8 guidExtensionCode[16]; 341 u8 bNumControls; 342 u8 bControlSize; 343 u8 *bmControls; 344 u8 *bmControlsType; 345 } extension; 346 }; 347 348 u8 bNrInPins; 349 u8 *baSourceID; 350 351 unsigned int ncontrols; 352 struct uvc_control *controls; 353 }; 354 355 struct uvc_frame { 356 u8 bFrameIndex; 357 u8 bmCapabilities; 358 u16 wWidth; 359 u16 wHeight; 360 u32 dwMinBitRate; 361 u32 dwMaxBitRate; 362 u32 dwMaxVideoFrameBufferSize; 363 u8 bFrameIntervalType; 364 u32 dwDefaultFrameInterval; 365 u32 *dwFrameInterval; 366 }; 367 368 struct uvc_format { 369 u8 type; 370 u8 index; 371 u8 bpp; 372 u8 colorspace; 373 u32 fcc; 374 u32 flags; 375 376 char name[32]; 377 378 unsigned int nframes; 379 struct uvc_frame *frame; 380 }; 381 382 struct uvc_streaming_header { 383 u8 bNumFormats; 384 u8 bEndpointAddress; 385 u8 bTerminalLink; 386 u8 bControlSize; 387 u8 *bmaControls; 388 /* The following fields are used by input headers only. */ 389 u8 bmInfo; 390 u8 bStillCaptureMethod; 391 u8 bTriggerSupport; 392 u8 bTriggerUsage; 393 }; 394 395 enum uvc_buffer_state { 396 UVC_BUF_STATE_IDLE = 0, 397 UVC_BUF_STATE_QUEUED = 1, 398 UVC_BUF_STATE_ACTIVE = 2, 399 UVC_BUF_STATE_READY = 3, 400 UVC_BUF_STATE_DONE = 4, 401 UVC_BUF_STATE_ERROR = 5, 402 }; 403 404 struct uvc_buffer { 405 struct vb2_v4l2_buffer buf; 406 struct list_head queue; 407 408 enum uvc_buffer_state state; 409 unsigned int error; 410 411 void *mem; 412 unsigned int length; 413 unsigned int bytesused; 414 415 u32 pts; 416 417 /* Asynchronous buffer handling. */ 418 struct kref ref; 419 }; 420 421 #define UVC_QUEUE_DISCONNECTED (1 << 0) 422 #define UVC_QUEUE_DROP_CORRUPTED (1 << 1) 423 424 struct uvc_video_queue { 425 struct vb2_queue queue; 426 struct mutex mutex; /* Protects queue */ 427 428 unsigned int flags; 429 unsigned int buf_used; 430 431 spinlock_t irqlock; /* Protects irqqueue */ 432 struct list_head irqqueue; 433 }; 434 435 struct uvc_video_chain { 436 struct uvc_device *dev; 437 struct list_head list; 438 439 struct list_head entities; /* All entities */ 440 struct uvc_entity *processing; /* Processing unit */ 441 struct uvc_entity *selector; /* Selector unit */ 442 443 struct mutex ctrl_mutex; /* Protects ctrl.info */ 444 445 struct v4l2_prio_state prio; /* V4L2 priority state */ 446 u32 caps; /* V4L2 chain-wide caps */ 447 }; 448 449 struct uvc_stats_frame { 450 unsigned int size; /* Number of bytes captured */ 451 unsigned int first_data; /* Index of the first non-empty packet */ 452 453 unsigned int nb_packets; /* Number of packets */ 454 unsigned int nb_empty; /* Number of empty packets */ 455 unsigned int nb_invalid; /* Number of packets with an invalid header */ 456 unsigned int nb_errors; /* Number of packets with the error bit set */ 457 458 unsigned int nb_pts; /* Number of packets with a PTS timestamp */ 459 unsigned int nb_pts_diffs; /* Number of PTS differences inside a frame */ 460 unsigned int last_pts_diff; /* Index of the last PTS difference */ 461 bool has_initial_pts; /* Whether the first non-empty packet has a PTS */ 462 bool has_early_pts; /* Whether a PTS is present before the first non-empty packet */ 463 u32 pts; /* PTS of the last packet */ 464 465 unsigned int nb_scr; /* Number of packets with a SCR timestamp */ 466 unsigned int nb_scr_diffs; /* Number of SCR.STC differences inside a frame */ 467 u16 scr_sof; /* SCR.SOF of the last packet */ 468 u32 scr_stc; /* SCR.STC of the last packet */ 469 }; 470 471 struct uvc_stats_stream { 472 ktime_t start_ts; /* Stream start timestamp */ 473 ktime_t stop_ts; /* Stream stop timestamp */ 474 475 unsigned int nb_frames; /* Number of frames */ 476 477 unsigned int nb_packets; /* Number of packets */ 478 unsigned int nb_empty; /* Number of empty packets */ 479 unsigned int nb_invalid; /* Number of packets with an invalid header */ 480 unsigned int nb_errors; /* Number of packets with the error bit set */ 481 482 unsigned int nb_pts_constant; /* Number of frames with constant PTS */ 483 unsigned int nb_pts_early; /* Number of frames with early PTS */ 484 unsigned int nb_pts_initial; /* Number of frames with initial PTS */ 485 486 unsigned int nb_scr_count_ok; /* Number of frames with at least one SCR per non empty packet */ 487 unsigned int nb_scr_diffs_ok; /* Number of frames with varying SCR.STC */ 488 unsigned int scr_sof_count; /* STC.SOF counter accumulated since stream start */ 489 unsigned int scr_sof; /* STC.SOF of the last packet */ 490 unsigned int min_sof; /* Minimum STC.SOF value */ 491 unsigned int max_sof; /* Maximum STC.SOF value */ 492 }; 493 494 #define UVC_METATADA_BUF_SIZE 1024 495 496 /** 497 * struct uvc_copy_op: Context structure to schedule asynchronous memcpy 498 * 499 * @buf: active buf object for this operation 500 * @dst: copy destination address 501 * @src: copy source address 502 * @len: copy length 503 */ 504 struct uvc_copy_op { 505 struct uvc_buffer *buf; 506 void *dst; 507 const __u8 *src; 508 size_t len; 509 }; 510 511 /** 512 * struct uvc_urb - URB context management structure 513 * 514 * @urb: the URB described by this context structure 515 * @stream: UVC streaming context 516 * @buffer: memory storage for the URB 517 * @dma: DMA coherent addressing for the urb_buffer 518 * @async_operations: counter to indicate the number of copy operations 519 * @copy_operations: work descriptors for asynchronous copy operations 520 * @work: work queue entry for asynchronous decode 521 */ 522 struct uvc_urb { 523 struct urb *urb; 524 struct uvc_streaming *stream; 525 526 char *buffer; 527 dma_addr_t dma; 528 529 unsigned int async_operations; 530 struct uvc_copy_op copy_operations[UVC_MAX_PACKETS]; 531 struct work_struct work; 532 }; 533 534 struct uvc_streaming { 535 struct list_head list; 536 struct uvc_device *dev; 537 struct video_device vdev; 538 struct uvc_video_chain *chain; 539 atomic_t active; 540 541 struct usb_interface *intf; 542 int intfnum; 543 u16 maxpsize; 544 545 struct uvc_streaming_header header; 546 enum v4l2_buf_type type; 547 548 unsigned int nformats; 549 struct uvc_format *format; 550 551 struct uvc_streaming_control ctrl; 552 struct uvc_format *def_format; 553 struct uvc_format *cur_format; 554 struct uvc_frame *cur_frame; 555 556 /* Protect access to ctrl, cur_format, cur_frame and hardware video 557 * probe control. 558 */ 559 struct mutex mutex; 560 561 /* Buffers queue. */ 562 unsigned int frozen : 1; 563 struct uvc_video_queue queue; 564 struct workqueue_struct *async_wq; 565 void (*decode)(struct uvc_urb *uvc_urb, struct uvc_buffer *buf, 566 struct uvc_buffer *meta_buf); 567 568 struct { 569 struct video_device vdev; 570 struct uvc_video_queue queue; 571 u32 format; 572 } meta; 573 574 /* Context data used by the bulk completion handler. */ 575 struct { 576 u8 header[256]; 577 unsigned int header_size; 578 int skip_payload; 579 u32 payload_size; 580 u32 max_payload_size; 581 } bulk; 582 583 struct uvc_urb uvc_urb[UVC_URBS]; 584 unsigned int urb_size; 585 586 u32 sequence; 587 u8 last_fid; 588 589 /* debugfs */ 590 struct dentry *debugfs_dir; 591 struct { 592 struct uvc_stats_frame frame; 593 struct uvc_stats_stream stream; 594 } stats; 595 596 /* Timestamps support. */ 597 struct uvc_clock { 598 struct uvc_clock_sample { 599 u32 dev_stc; 600 u16 dev_sof; 601 u16 host_sof; 602 ktime_t host_time; 603 } *samples; 604 605 unsigned int head; 606 unsigned int count; 607 unsigned int size; 608 609 u16 last_sof; 610 u16 sof_offset; 611 612 u8 last_scr[6]; 613 614 spinlock_t lock; 615 } clock; 616 }; 617 618 #define for_each_uvc_urb(uvc_urb, uvc_streaming) \ 619 for ((uvc_urb) = &(uvc_streaming)->uvc_urb[0]; \ 620 (uvc_urb) < &(uvc_streaming)->uvc_urb[UVC_URBS]; \ 621 ++(uvc_urb)) 622 623 static inline u32 uvc_urb_index(const struct uvc_urb *uvc_urb) 624 { 625 return uvc_urb - &uvc_urb->stream->uvc_urb[0]; 626 } 627 628 struct uvc_device_info { 629 u32 quirks; 630 u32 meta_format; 631 }; 632 633 struct uvc_device { 634 struct usb_device *udev; 635 struct usb_interface *intf; 636 unsigned long warnings; 637 u32 quirks; 638 int intfnum; 639 char name[32]; 640 641 const struct uvc_device_info *info; 642 643 struct mutex lock; /* Protects users */ 644 unsigned int users; 645 atomic_t nmappings; 646 647 /* Video control interface */ 648 #ifdef CONFIG_MEDIA_CONTROLLER 649 struct media_device mdev; 650 #endif 651 struct v4l2_device vdev; 652 u16 uvc_version; 653 u32 clock_frequency; 654 655 struct list_head entities; 656 struct list_head chains; 657 658 /* Video Streaming interfaces */ 659 struct list_head streams; 660 struct kref ref; 661 662 /* Status Interrupt Endpoint */ 663 struct usb_host_endpoint *int_ep; 664 struct urb *int_urb; 665 u8 *status; 666 struct input_dev *input; 667 char input_phys[64]; 668 669 struct uvc_ctrl_work { 670 struct work_struct work; 671 struct urb *urb; 672 struct uvc_video_chain *chain; 673 struct uvc_control *ctrl; 674 const void *data; 675 } async_ctrl; 676 }; 677 678 enum uvc_handle_state { 679 UVC_HANDLE_PASSIVE = 0, 680 UVC_HANDLE_ACTIVE = 1, 681 }; 682 683 struct uvc_fh { 684 struct v4l2_fh vfh; 685 struct uvc_video_chain *chain; 686 struct uvc_streaming *stream; 687 enum uvc_handle_state state; 688 }; 689 690 struct uvc_driver { 691 struct usb_driver driver; 692 }; 693 694 /* ------------------------------------------------------------------------ 695 * Debugging, printing and logging 696 */ 697 698 #define UVC_TRACE_PROBE (1 << 0) 699 #define UVC_TRACE_DESCR (1 << 1) 700 #define UVC_TRACE_CONTROL (1 << 2) 701 #define UVC_TRACE_FORMAT (1 << 3) 702 #define UVC_TRACE_CAPTURE (1 << 4) 703 #define UVC_TRACE_CALLS (1 << 5) 704 #define UVC_TRACE_FRAME (1 << 7) 705 #define UVC_TRACE_SUSPEND (1 << 8) 706 #define UVC_TRACE_STATUS (1 << 9) 707 #define UVC_TRACE_VIDEO (1 << 10) 708 #define UVC_TRACE_STATS (1 << 11) 709 #define UVC_TRACE_CLOCK (1 << 12) 710 711 #define UVC_WARN_MINMAX 0 712 #define UVC_WARN_PROBE_DEF 1 713 #define UVC_WARN_XU_GET_RES 2 714 715 extern unsigned int uvc_clock_param; 716 extern unsigned int uvc_no_drop_param; 717 extern unsigned int uvc_trace_param; 718 extern unsigned int uvc_timeout_param; 719 extern unsigned int uvc_hw_timestamps_param; 720 721 #define uvc_trace(flag, msg...) \ 722 do { \ 723 if (uvc_trace_param & flag) \ 724 printk(KERN_DEBUG "uvcvideo: " msg); \ 725 } while (0) 726 727 #define uvc_warn_once(dev, warn, msg...) \ 728 do { \ 729 if (!test_and_set_bit(warn, &dev->warnings)) \ 730 printk(KERN_INFO "uvcvideo: " msg); \ 731 } while (0) 732 733 #define uvc_printk(level, msg...) \ 734 printk(level "uvcvideo: " msg) 735 736 /* -------------------------------------------------------------------------- 737 * Internal functions. 738 */ 739 740 /* Core driver */ 741 extern struct uvc_driver uvc_driver; 742 743 struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id); 744 745 /* Video buffers queue management. */ 746 int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type, 747 int drop_corrupted); 748 void uvc_queue_release(struct uvc_video_queue *queue); 749 int uvc_request_buffers(struct uvc_video_queue *queue, 750 struct v4l2_requestbuffers *rb); 751 int uvc_query_buffer(struct uvc_video_queue *queue, 752 struct v4l2_buffer *v4l2_buf); 753 int uvc_create_buffers(struct uvc_video_queue *queue, 754 struct v4l2_create_buffers *v4l2_cb); 755 int uvc_queue_buffer(struct uvc_video_queue *queue, 756 struct media_device *mdev, 757 struct v4l2_buffer *v4l2_buf); 758 int uvc_export_buffer(struct uvc_video_queue *queue, 759 struct v4l2_exportbuffer *exp); 760 int uvc_dequeue_buffer(struct uvc_video_queue *queue, 761 struct v4l2_buffer *v4l2_buf, int nonblocking); 762 int uvc_queue_streamon(struct uvc_video_queue *queue, enum v4l2_buf_type type); 763 int uvc_queue_streamoff(struct uvc_video_queue *queue, enum v4l2_buf_type type); 764 void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect); 765 struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue, 766 struct uvc_buffer *buf); 767 struct uvc_buffer *uvc_queue_get_current_buffer(struct uvc_video_queue *queue); 768 void uvc_queue_buffer_release(struct uvc_buffer *buf); 769 int uvc_queue_mmap(struct uvc_video_queue *queue, 770 struct vm_area_struct *vma); 771 __poll_t uvc_queue_poll(struct uvc_video_queue *queue, struct file *file, 772 poll_table *wait); 773 #ifndef CONFIG_MMU 774 unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue, 775 unsigned long pgoff); 776 #endif 777 int uvc_queue_allocated(struct uvc_video_queue *queue); 778 static inline int uvc_queue_streaming(struct uvc_video_queue *queue) 779 { 780 return vb2_is_streaming(&queue->queue); 781 } 782 783 /* V4L2 interface */ 784 extern const struct v4l2_ioctl_ops uvc_ioctl_ops; 785 extern const struct v4l2_file_operations uvc_fops; 786 787 /* Media controller */ 788 int uvc_mc_register_entities(struct uvc_video_chain *chain); 789 void uvc_mc_cleanup_entity(struct uvc_entity *entity); 790 791 /* Video */ 792 int uvc_video_init(struct uvc_streaming *stream); 793 int uvc_video_suspend(struct uvc_streaming *stream); 794 int uvc_video_resume(struct uvc_streaming *stream, int reset); 795 int uvc_video_start_streaming(struct uvc_streaming *stream); 796 void uvc_video_stop_streaming(struct uvc_streaming *stream); 797 int uvc_probe_video(struct uvc_streaming *stream, 798 struct uvc_streaming_control *probe); 799 int uvc_query_ctrl(struct uvc_device *dev, u8 query, u8 unit, 800 u8 intfnum, u8 cs, void *data, u16 size); 801 void uvc_video_clock_update(struct uvc_streaming *stream, 802 struct vb2_v4l2_buffer *vbuf, 803 struct uvc_buffer *buf); 804 int uvc_meta_register(struct uvc_streaming *stream); 805 806 int uvc_register_video_device(struct uvc_device *dev, 807 struct uvc_streaming *stream, 808 struct video_device *vdev, 809 struct uvc_video_queue *queue, 810 enum v4l2_buf_type type, 811 const struct v4l2_file_operations *fops, 812 const struct v4l2_ioctl_ops *ioctl_ops); 813 814 /* Status */ 815 int uvc_status_init(struct uvc_device *dev); 816 void uvc_status_unregister(struct uvc_device *dev); 817 void uvc_status_cleanup(struct uvc_device *dev); 818 int uvc_status_start(struct uvc_device *dev, gfp_t flags); 819 void uvc_status_stop(struct uvc_device *dev); 820 821 /* Controls */ 822 extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops; 823 824 int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, 825 struct v4l2_queryctrl *v4l2_ctrl); 826 int uvc_query_v4l2_menu(struct uvc_video_chain *chain, 827 struct v4l2_querymenu *query_menu); 828 829 int uvc_ctrl_add_mapping(struct uvc_video_chain *chain, 830 const struct uvc_control_mapping *mapping); 831 int uvc_ctrl_init_device(struct uvc_device *dev); 832 void uvc_ctrl_cleanup_device(struct uvc_device *dev); 833 int uvc_ctrl_restore_values(struct uvc_device *dev); 834 bool uvc_ctrl_status_event(struct urb *urb, struct uvc_video_chain *chain, 835 struct uvc_control *ctrl, const u8 *data); 836 837 int uvc_ctrl_begin(struct uvc_video_chain *chain); 838 int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback, 839 const struct v4l2_ext_control *xctrls, 840 unsigned int xctrls_count); 841 static inline int uvc_ctrl_commit(struct uvc_fh *handle, 842 const struct v4l2_ext_control *xctrls, 843 unsigned int xctrls_count) 844 { 845 return __uvc_ctrl_commit(handle, 0, xctrls, xctrls_count); 846 } 847 static inline int uvc_ctrl_rollback(struct uvc_fh *handle) 848 { 849 return __uvc_ctrl_commit(handle, 1, NULL, 0); 850 } 851 852 int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl); 853 int uvc_ctrl_set(struct uvc_fh *handle, struct v4l2_ext_control *xctrl); 854 855 int uvc_xu_ctrl_query(struct uvc_video_chain *chain, 856 struct uvc_xu_control_query *xqry); 857 858 /* Utility functions */ 859 void uvc_simplify_fraction(u32 *numerator, u32 *denominator, 860 unsigned int n_terms, unsigned int threshold); 861 u32 uvc_fraction_to_interval(u32 numerator, u32 denominator); 862 struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts, 863 u8 epaddr); 864 865 /* Quirks support */ 866 void uvc_video_decode_isight(struct uvc_urb *uvc_urb, 867 struct uvc_buffer *buf, 868 struct uvc_buffer *meta_buf); 869 870 /* debugfs and statistics */ 871 void uvc_debugfs_init(void); 872 void uvc_debugfs_cleanup(void); 873 void uvc_debugfs_init_stream(struct uvc_streaming *stream); 874 void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream); 875 876 size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf, 877 size_t size); 878 879 #endif 880