drivers/media/usb/usbvision/usbvision.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * USBVISION.H
   4  *  usbvision header file
   5  *
   6  * Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de>
   7  *                         Dwaine Garden <dwainegarden@rogers.com>
   8  *
   9  * Report problems to v4l MailingList: linux-media@vger.kernel.org
  10  *
  11  * This module is part of usbvision driver project.
  12  * Updates to driver completed by Dwaine P. Garden
  13  * v4l2 conversion by Thierry Merle <thierry.merle@free.fr>
  14  */
  15
  16
  17 #ifndef __LINUX_USBVISION_H
  18 #define __LINUX_USBVISION_H
  19
  20 #include <linux/list.h>
  21 #include <linux/usb.h>
  22 #include <linux/i2c.h>
  23 #include <linux/mutex.h>
  24 #include <media/v4l2-device.h>
  25 #include <media/v4l2-ctrls.h>
  26 #include <media/tuner.h>
  27 #include <linux/videodev2.h>
  28
  29 #define USBVISION_DEBUG         /* Turn on debug messages */
  30
  31 #define USBVISION_PWR_REG               0x00
  32         #define USBVISION_SSPND_EN              (1 << 1)
  33         #define USBVISION_RES2                  (1 << 2)
  34         #define USBVISION_PWR_VID               (1 << 5)
  35         #define USBVISION_E2_EN                 (1 << 7)
  36 #define USBVISION_CONFIG_REG            0x01
  37 #define USBVISION_ADRS_REG              0x02
  38 #define USBVISION_ALTER_REG             0x03
  39 #define USBVISION_FORCE_ALTER_REG       0x04
  40 #define USBVISION_STATUS_REG            0x05
  41 #define USBVISION_IOPIN_REG             0x06
  42         #define USBVISION_IO_1                  (1 << 0)
  43         #define USBVISION_IO_2                  (1 << 1)
  44         #define USBVISION_AUDIO_IN              0
  45         #define USBVISION_AUDIO_TV              1
  46         #define USBVISION_AUDIO_RADIO           2
  47         #define USBVISION_AUDIO_MUTE            3
  48 #define USBVISION_SER_MODE              0x07
  49         #define USBVISION_CLK_OUT               (1 << 0)
  50         #define USBVISION_DAT_IO                (1 << 1)
  51         #define USBVISION_SENS_OUT              (1 << 2)
  52         #define USBVISION_SER_MODE_SOFT         (0 << 4)
  53         #define USBVISION_SER_MODE_SIO          (1 << 4)
  54 #define USBVISION_SER_ADRS              0x08
  55 #define USBVISION_SER_CONT              0x09
  56 #define USBVISION_SER_DAT1              0x0A
  57 #define USBVISION_SER_DAT2              0x0B
  58 #define USBVISION_SER_DAT3              0x0C
  59 #define USBVISION_SER_DAT4              0x0D
  60 #define USBVISION_EE_DATA               0x0E
  61 #define USBVISION_EE_LSBAD              0x0F
  62 #define USBVISION_EE_CONT               0x10
  63 #define USBVISION_DRM_CONT                      0x12
  64         #define USBVISION_REF                   (1 << 0)
  65         #define USBVISION_RES_UR                (1 << 2)
  66         #define USBVISION_RES_FDL               (1 << 3)
  67         #define USBVISION_RES_VDW               (1 << 4)
  68 #define USBVISION_DRM_PRM1              0x13
  69 #define USBVISION_DRM_PRM2              0x14
  70 #define USBVISION_DRM_PRM3              0x15
  71 #define USBVISION_DRM_PRM4              0x16
  72 #define USBVISION_DRM_PRM5              0x17
  73 #define USBVISION_DRM_PRM6              0x18
  74 #define USBVISION_DRM_PRM7              0x19
  75 #define USBVISION_DRM_PRM8              0x1A
  76 #define USBVISION_VIN_REG1              0x1B
  77         #define USBVISION_8_422_SYNC            0x01
  78         #define USBVISION_16_422_SYNC           0x02
  79         #define USBVISION_VSNC_POL              (1 << 3)
  80         #define USBVISION_HSNC_POL              (1 << 4)
  81         #define USBVISION_FID_POL               (1 << 5)
  82         #define USBVISION_HVALID_PO             (1 << 6)
  83         #define USBVISION_VCLK_POL              (1 << 7)
  84 #define USBVISION_VIN_REG2              0x1C
  85         #define USBVISION_AUTO_FID              (1 << 0)
  86         #define USBVISION_NONE_INTER            (1 << 1)
  87         #define USBVISION_NOHVALID              (1 << 2)
  88         #define USBVISION_UV_ID                 (1 << 3)
  89         #define USBVISION_FIX_2C                (1 << 4)
  90         #define USBVISION_SEND_FID              (1 << 5)
  91         #define USBVISION_KEEP_BLANK            (1 << 7)
  92 #define USBVISION_LXSIZE_I              0x1D
  93 #define USBVISION_MXSIZE_I              0x1E
  94 #define USBVISION_LYSIZE_I              0x1F
  95 #define USBVISION_MYSIZE_I              0x20
  96 #define USBVISION_LX_OFFST              0x21
  97 #define USBVISION_MX_OFFST              0x22
  98 #define USBVISION_LY_OFFST              0x23
  99 #define USBVISION_MY_OFFST              0x24
 100 #define USBVISION_FRM_RATE              0x25
 101 #define USBVISION_LXSIZE_O              0x26
 102 #define USBVISION_MXSIZE_O              0x27
 103 #define USBVISION_LYSIZE_O              0x28
 104 #define USBVISION_MYSIZE_O              0x29
 105 #define USBVISION_FILT_CONT             0x2A
 106 #define USBVISION_VO_MODE               0x2B
 107 #define USBVISION_INTRA_CYC             0x2C
 108 #define USBVISION_STRIP_SZ              0x2D
 109 #define USBVISION_FORCE_INTRA           0x2E
 110 #define USBVISION_FORCE_UP              0x2F
 111 #define USBVISION_BUF_THR               0x30
 112 #define USBVISION_DVI_YUV               0x31
 113 #define USBVISION_AUDIO_CONT            0x32
 114 #define USBVISION_AUD_PK_LEN            0x33
 115 #define USBVISION_BLK_PK_LEN            0x34
 116 #define USBVISION_PCM_THR1              0x38
 117 #define USBVISION_PCM_THR2              0x39
 118 #define USBVISION_DIST_THR_L            0x3A
 119 #define USBVISION_DIST_THR_H            0x3B
 120 #define USBVISION_MAX_DIST_L            0x3C
 121 #define USBVISION_MAX_DIST_H            0x3D
 122 #define USBVISION_OP_CODE               0x33
 123
 124 #define MAX_BYTES_PER_PIXEL             4
 125
 126 #define MIN_FRAME_WIDTH                 64
 127 #define MAX_USB_WIDTH                   320  /* 384 */
 128 #define MAX_FRAME_WIDTH                 320  /* 384 */                  /* stretching sometimes causes crashes*/
 129
 130 #define MIN_FRAME_HEIGHT                48
 131 #define MAX_USB_HEIGHT                  240  /* 288 */
 132 #define MAX_FRAME_HEIGHT                240  /* 288 */                  /* Stretching sometimes causes crashes*/
 133
 134 #define MAX_FRAME_SIZE                  (MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * MAX_BYTES_PER_PIXEL)
 135 #define USBVISION_CLIPMASK_SIZE         (MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT / 8) /* bytesize of clipmask */
 136
 137 #define USBVISION_URB_FRAMES            32
 138
 139 #define USBVISION_NUM_HEADERMARKER      20
 140 #define USBVISION_NUMFRAMES             3  /* Maximum number of frames an application can get */
 141 #define USBVISION_NUMSBUF               2 /* Dimensioning the USB S buffering */
 142
 143 #define USBVISION_POWEROFF_TIME         (3 * HZ)                /* 3 seconds */
 144
 145
 146 #define FRAMERATE_MIN   0
 147 #define FRAMERATE_MAX   31
 148
 149 enum {
 150         ISOC_MODE_YUV422 = 0x03,
 151         ISOC_MODE_YUV420 = 0x14,
 152         ISOC_MODE_COMPRESS = 0x60,
 153 };
 154
 155 /* This macro restricts an int variable to an inclusive range */
 156 #define RESTRICT_TO_RANGE(v, mi, ma) \
 157         { if (((int)v) < (mi)) (v) = (mi); else if ((v) > (ma)) (v) = (ma); }
 158
 159 /*
 160  * We use macros to do YUV -> RGB conversion because this is
 161  * very important for speed and totally unimportant for size.
 162  *
 163  * YUV -> RGB Conversion
 164  * ---------------------
 165  *
 166  * B = 1.164*(Y-16)                 + 2.018*(V-128)
 167  * G = 1.164*(Y-16) - 0.813*(U-128) - 0.391*(V-128)
 168  * R = 1.164*(Y-16) + 1.596*(U-128)
 169  *
 170  * If you fancy integer arithmetic (as you should), hear this:
 171  *
 172  * 65536*B = 76284*(Y-16)                 + 132252*(V-128)
 173  * 65536*G = 76284*(Y-16) -  53281*(U-128) -  25625*(V-128)
 174  * 65536*R = 76284*(Y-16) + 104595*(U-128)
 175  *
 176  * Make sure the output values are within [0..255] range.
 177  */
 178 #define LIMIT_RGB(x) (((x) < 0) ? 0 : (((x) > 255) ? 255 : (x)))
 179 #define YUV_TO_RGB_BY_THE_BOOK(my, mu, mv, mr, mg, mb) { \
 180         int mm_y, mm_yc, mm_u, mm_v, mm_r, mm_g, mm_b; \
 181         mm_y = (my) - 16; \
 182         mm_u = (mu) - 128; \
 183         mm_v = (mv) - 128; \
 184         mm_yc = mm_y * 76284; \
 185         mm_b = (mm_yc + 132252 * mm_v) >> 16; \
 186         mm_g = (mm_yc - 53281 * mm_u - 25625 * mm_v) >> 16; \
 187         mm_r = (mm_yc + 104595 * mm_u) >> 16; \
 188         mb = LIMIT_RGB(mm_b); \
 189         mg = LIMIT_RGB(mm_g); \
 190         mr = LIMIT_RGB(mm_r); \
 191 }
 192
 193 /*
 194  * This macro checks if usbvision is still operational. The 'usbvision'
 195  * pointer must be valid, usbvision->dev must be valid, we are not
 196  * removing the device and the device has not erred on us.
 197  */
 198 #define USBVISION_IS_OPERATIONAL(udevice) (\
 199         (udevice != NULL) && \
 200         ((udevice)->dev != NULL) && \
 201         ((udevice)->last_error == 0) && \
 202         (!(udevice)->remove_pending))
 203
 204 #define I2C_USB_ADAP_MAX        16
 205
 206 #define USBVISION_NORMS (V4L2_STD_PAL | V4L2_STD_NTSC | V4L2_STD_SECAM | V4L2_STD_PAL_M)
 207
 208 /* ----------------------------------------------------------------- */
 209 /* usbvision video structures                                        */
 210 /* ----------------------------------------------------------------- */
 211 enum scan_state {
 212         scan_state_scanning,    /* Scanning for header */
 213         scan_state_lines        /* Parsing lines */
 214 };
 215
 216 /* Completion states of the data parser */
 217 enum parse_state {
 218         parse_state_continue,   /* Just parse next item */
 219         parse_state_next_frame, /* Frame done, send it to V4L */
 220         parse_state_out,        /* Not enough data for frame */
 221         parse_state_end_parse   /* End parsing */
 222 };
 223
 224 enum frame_state {
 225         frame_state_unused,     /* Unused (no MCAPTURE) */
 226         frame_state_ready,      /* Ready to start grabbing */
 227         frame_state_grabbing,   /* In the process of being grabbed into */
 228         frame_state_done,       /* Finished grabbing, but not been synced yet */
 229         frame_state_done_hold,  /* Are syncing or reading */
 230         frame_state_error,      /* Something bad happened while processing */
 231 };
 232
 233 /* stream states */
 234 enum stream_state {
 235         stream_off,             /* Driver streaming is completely OFF */
 236         stream_idle,            /* Driver streaming is ready to be put ON by the application */
 237         stream_interrupt,       /* Driver streaming must be interrupted */
 238         stream_on,              /* Driver streaming is put ON by the application */
 239 };
 240
 241 enum isoc_state {
 242         isoc_state_in_frame,    /* Isoc packet is member of frame */
 243         isoc_state_no_frame,    /* Isoc packet is not member of any frame */
 244 };
 245
 246 struct usb_device;
 247
 248 struct usbvision_sbuf {
 249         char *data;
 250         struct urb *urb;
 251 };
 252
 253 #define USBVISION_MAGIC_1                       0x55
 254 #define USBVISION_MAGIC_2                       0xAA
 255 #define USBVISION_HEADER_LENGTH                 0x0c
 256 #define USBVISION_SAA7111_ADDR                  0x48
 257 #define USBVISION_SAA7113_ADDR                  0x4a
 258 #define USBVISION_IIC_LRACK                     0x20
 259 #define USBVISION_IIC_LRNACK                    0x30
 260 #define USBVISION_FRAME_FORMAT_PARAM_INTRA      (1<<7)
 261
 262 struct usbvision_v4l2_format_st {
 263         int             supported;
 264         int             bytes_per_pixel;
 265         int             depth;
 266         int             format;
 267         char            *desc;
 268 };
 269 #define USBVISION_SUPPORTED_PALETTES ARRAY_SIZE(usbvision_v4l2_format)
 270
 271 struct usbvision_frame_header {
 272         unsigned char magic_1;                          /* 0 magic */
 273         unsigned char magic_2;                          /* 1  magic */
 274         unsigned char header_length;                    /* 2 */
 275         unsigned char frame_num;                        /* 3 */
 276         unsigned char frame_phase;                      /* 4 */
 277         unsigned char frame_latency;                    /* 5 */
 278         unsigned char data_format;                      /* 6 */
 279         unsigned char format_param;                     /* 7 */
 280         unsigned char frame_width_lo;                   /* 8 */
 281         unsigned char frame_width_hi;                   /* 9 */
 282         unsigned char frame_height_lo;                  /* 10 */
 283         unsigned char frame_height_hi;                  /* 11 */
 284         __u16 frame_width;                              /* 8 - 9 after endian correction*/
 285         __u16 frame_height;                             /* 10 - 11 after endian correction*/
 286 };
 287
 288 struct usbvision_frame {
 289         char *data;                                     /* Frame buffer */
 290         struct usbvision_frame_header isoc_header;      /* Header from stream */
 291
 292         int width;                                      /* Width application is expecting */
 293         int height;                                     /* Height */
 294         int index;                                      /* Frame index */
 295         int frmwidth;                                   /* Width the frame actually is */
 296         int frmheight;                                  /* Height */
 297
 298         volatile int grabstate;                         /* State of grabbing */
 299         int scanstate;                                  /* State of scanning */
 300
 301         struct list_head frame;
 302
 303         int curline;                                    /* Line of frame we're working on */
 304
 305         long scanlength;                                /* uncompressed, raw data length of frame */
 306         long bytes_read;                                /* amount of scanlength that has been read from data */
 307         struct usbvision_v4l2_format_st v4l2_format;    /* format the user needs*/
 308         int v4l2_linesize;                              /* bytes for one videoline*/
 309         u64 ts;
 310         int sequence;                                   /* How many video frames we send to user */
 311 };
 312
 313 #define CODEC_SAA7113   7113
 314 #define CODEC_SAA7111   7111
 315 #define CODEC_WEBCAM    3000
 316 #define BRIDGE_NT1003   1003
 317 #define BRIDGE_NT1004   1004
 318 #define BRIDGE_NT1005   1005
 319
 320 struct usbvision_device_data_st {
 321         __u64 video_norm;
 322         const char *model_string;
 323         int interface; /* to handle special interface number like BELKIN and Hauppauge WinTV-USB II */
 324         __u16 codec;
 325         unsigned video_channels:3;
 326         unsigned audio_channels:2;
 327         unsigned radio:1;
 328         unsigned vbi:1;
 329         unsigned tuner:1;
 330         unsigned vin_reg1_override:1;   /* Override default value with */
 331         unsigned vin_reg2_override:1;   /* vin_reg1, vin_reg2, etc. */
 332         unsigned dvi_yuv_override:1;
 333         __u8 vin_reg1;
 334         __u8 vin_reg2;
 335         __u8 dvi_yuv;
 336         __u8 tuner_type;
 337         __s16 x_offset;
 338         __s16 y_offset;
 339 };
 340
 341 /* Declared on usbvision-cards.c */
 342 extern struct usbvision_device_data_st usbvision_device_data[];
 343 extern struct usb_device_id usbvision_table[];
 344
 345 struct usb_usbvision {
 346         struct v4l2_device v4l2_dev;
 347         struct v4l2_ctrl_handler hdl;
 348         struct video_device vdev;                                       /* Video Device */
 349         struct video_device rdev;                                       /* Radio Device */
 350
 351         /* i2c Declaration Section*/
 352         struct i2c_adapter i2c_adap;
 353         int registered_i2c;
 354
 355         struct urb *ctrl_urb;
 356         unsigned char ctrl_urb_buffer[8];
 357         int ctrl_urb_busy;
 358         struct usb_ctrlrequest ctrl_urb_setup;
 359
 360         /* configuration part */
 361         int have_tuner;
 362         int tuner_type;
 363         int bridge_type;                                                /* NT1003, NT1004, NT1005 */
 364         int radio;
 365         int video_inputs;                                               /* # of inputs */
 366         unsigned long radio_freq;
 367         unsigned long tv_freq;
 368         int audio_mute;
 369         int audio_channel;
 370         int isoc_mode;                                                  /* format of video data for the usb isoc-transfer */
 371         unsigned int nr;                                                /* Number of the device */
 372
 373         /* Device structure */
 374         struct usb_device *dev;
 375         /* usb transfer */
 376         int num_alt;            /* Number of alternative settings */
 377         unsigned int *alt_max_pkt_size; /* array of max_packet_size */
 378         unsigned char iface;                                            /* Video interface number */
 379         unsigned char iface_alt;                                        /* Alt settings */
 380         unsigned char vin_reg2_preset;
 381         struct mutex v4l2_lock;
 382         int power;                                                      /* is the device powered on? */
 383         int user;                                                       /* user count for exclusive use */
 384         int initialized;                                                /* Had we already sent init sequence? */
 385         int dev_model;                                                  /* What type of USBVISION device we got? */
 386         enum stream_state streaming;                                    /* Are we streaming Isochronous? */
 387         int last_error;                                                 /* What calamity struck us? */
 388         int curwidth;                                                   /* width of the frame the device is currently set to*/
 389         int curheight;                                                  /* height of the frame the device is currently set to*/
 390         int stretch_width;                                              /* stretch-factor for frame width (from usb to screen)*/
 391         int stretch_height;                                             /* stretch-factor for frame height (from usb to screen)*/
 392         char *fbuf;                                                     /* Videodev buffer area for mmap*/
 393         int max_frame_size;                                             /* Bytes in one video frame */
 394         int fbuf_size;                                                  /* Videodev buffer size */
 395         spinlock_t queue_lock;                                          /* spinlock for protecting mods on inqueue and outqueue */
 396         struct list_head inqueue, outqueue;                             /* queued frame list and ready to dequeue frame list */
 397         wait_queue_head_t wait_frame;                                   /* Processes waiting */
 398         wait_queue_head_t wait_stream;                                  /* Processes waiting */
 399         struct usbvision_frame *cur_frame;                              /* pointer to current frame, set by usbvision_find_header */
 400         struct usbvision_frame frame[USBVISION_NUMFRAMES];              /* frame buffer */
 401         int num_frames;                                                 /* number of frames allocated */
 402         struct usbvision_sbuf sbuf[USBVISION_NUMSBUF];                  /* S buffering */
 403         volatile int remove_pending;                                    /* If set then about to exit */
 404
 405         /* Scratch space from the Isochronous Pipe.*/
 406         unsigned char *scratch;
 407         int scratch_read_ptr;
 408         int scratch_write_ptr;
 409         int scratch_headermarker[USBVISION_NUM_HEADERMARKER];
 410         int scratch_headermarker_read_ptr;
 411         int scratch_headermarker_write_ptr;
 412         enum isoc_state isocstate;
 413         struct usbvision_v4l2_format_st palette;
 414
 415         struct v4l2_capability vcap;                                    /* Video capabilities */
 416         unsigned int ctl_input;                                         /* selected input */
 417         v4l2_std_id tvnorm_id;                                          /* selected tv norm */
 418         unsigned char video_endp;                                       /* 0x82 for USBVISION devices based */
 419
 420         /* Decompression stuff: */
 421         unsigned char *intra_frame_buffer;                              /* Buffer for reference frame */
 422         int block_pos;                                                  /* for test only */
 423         int request_intra;                                              /* 0 = normal; 1 = intra frame is requested; */
 424         int last_isoc_frame_num;                                        /* check for lost isoc frames */
 425         int isoc_packet_size;                                           /* need to calculate used_bandwidth */
 426         int used_bandwidth;                                             /* used bandwidth 0-100%, need to set compr_level */
 427         int compr_level;                                                /* How strong (100) or weak (0) is compression */
 428         int last_compr_level;                                           /* How strong (100) or weak (0) was compression */
 429         int usb_bandwidth;                                              /* Mbit/s */
 430
 431         /* Statistics that can be overlaid on the screen */
 432         unsigned long isoc_urb_count;                   /* How many URBs we received so far */
 433         unsigned long urb_length;                       /* Length of last URB */
 434         unsigned long isoc_data_count;                  /* How many bytes we received */
 435         unsigned long header_count;                     /* How many frame headers we found */
 436         unsigned long scratch_ovf_count;                /* How many times we overflowed scratch */
 437         unsigned long isoc_skip_count;                  /* How many empty ISO packets received */
 438         unsigned long isoc_err_count;                   /* How many bad ISO packets received */
 439         unsigned long isoc_packet_count;                /* How many packets we totally got */
 440         int isoc_measure_bandwidth_count;
 441         int frame_num;                                  /* How many video frames we send to user */
 442         int max_strip_len;                              /* How big is the biggest strip */
 443         int comprblock_pos;
 444         int strip_len_errors;                           /* How many times was block_pos greater than strip_len */
 445         int strip_magic_errors;
 446         int strip_line_number_errors;
 447         int compr_block_types[4];
 448 };
 449
 450 static inline struct usb_usbvision *to_usbvision(struct v4l2_device *v4l2_dev)
 451 {
 452         return container_of(v4l2_dev, struct usb_usbvision, v4l2_dev);
 453 }
 454
 455 #define call_all(usbvision, o, f, args...) \
 456         v4l2_device_call_all(&usbvision->v4l2_dev, 0, o, f, ##args)
 457
 458 /* --------------------------------------------------------------- */
 459 /* defined in usbvision-i2c.c                                      */
 460 /* i2c-algo-usb declaration                                        */
 461 /* --------------------------------------------------------------- */
 462
 463 /* ----------------------------------------------------------------------- */
 464 /* usbvision specific I2C functions                                        */
 465 /* ----------------------------------------------------------------------- */
 466 int usbvision_i2c_register(struct usb_usbvision *usbvision);
 467 int usbvision_i2c_unregister(struct usb_usbvision *usbvision);
 468
 469 /* defined in usbvision-core.c                                      */
 470 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg);
 471 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
 472                         unsigned char value);
 473
 474 int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames);
 475 void usbvision_frames_free(struct usb_usbvision *usbvision);
 476 int usbvision_scratch_alloc(struct usb_usbvision *usbvision);
 477 void usbvision_scratch_free(struct usb_usbvision *usbvision);
 478 int usbvision_decompress_alloc(struct usb_usbvision *usbvision);
 479 void usbvision_decompress_free(struct usb_usbvision *usbvision);
 480
 481 int usbvision_setup(struct usb_usbvision *usbvision, int format);
 482 int usbvision_init_isoc(struct usb_usbvision *usbvision);
 483 int usbvision_restart_isoc(struct usb_usbvision *usbvision);
 484 void usbvision_stop_isoc(struct usb_usbvision *usbvision);
 485 int usbvision_set_alternate(struct usb_usbvision *dev);
 486
 487 int usbvision_set_audio(struct usb_usbvision *usbvision, int audio_channel);
 488 int usbvision_audio_off(struct usb_usbvision *usbvision);
 489
 490 int usbvision_begin_streaming(struct usb_usbvision *usbvision);
 491 void usbvision_empty_framequeues(struct usb_usbvision *dev);
 492 int usbvision_stream_interrupt(struct usb_usbvision *dev);
 493
 494 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel);
 495 int usbvision_set_input(struct usb_usbvision *usbvision);
 496 int usbvision_set_output(struct usb_usbvision *usbvision, int width, int height);
 497
 498 int usbvision_power_off(struct usb_usbvision *usbvision);
 499 int usbvision_power_on(struct usb_usbvision *usbvision);
 500
 501 #endif                                                                  /* __LINUX_USBVISION_H */