LXR linux/drivers/media/usb/usbvision/usbvision.h

   1/*
   2 * USBVISION.H
   3 *  usbvision header file
   4 *
   5 * Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de>
   6 *                         Dwaine Garden <dwainegarden@rogers.com>
   7 *
   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 * This program is free software; you can redistribute it and/or modify
  16 * it under the terms of the GNU General Public License as published by
  17 * the Free Software Foundation; either version 2 of the License, or
  18 * (at your option) any later version.
  19 *
  20 * This program is distributed in the hope that it will be useful,
  21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23 * GNU General Public License for more details.
  24 */
  25
  26
  27#ifndef __LINUX_USBVISION_H
  28#define __LINUX_USBVISION_H
  29
  30#include <linux/list.h>
  31#include <linux/usb.h>
  32#include <linux/i2c.h>
  33#include <linux/mutex.h>
  34#include <media/v4l2-device.h>
  35#include <media/v4l2-ctrls.h>
  36#include <media/tuner.h>
  37#include <linux/videodev2.h>
  38
  39#define USBVISION_DEBUG         /* Turn on debug messages */
  40
  41#define USBVISION_PWR_REG               0x00
  42        #define USBVISION_SSPND_EN              (1 << 1)
  43        #define USBVISION_RES2                  (1 << 2)
  44        #define USBVISION_PWR_VID               (1 << 5)
  45        #define USBVISION_E2_EN                 (1 << 7)
  46#define USBVISION_CONFIG_REG            0x01
  47#define USBVISION_ADRS_REG              0x02
  48#define USBVISION_ALTER_REG             0x03
  49#define USBVISION_FORCE_ALTER_REG       0x04
  50#define USBVISION_STATUS_REG            0x05
  51#define USBVISION_IOPIN_REG             0x06
  52        #define USBVISION_IO_1                  (1 << 0)
  53        #define USBVISION_IO_2                  (1 << 1)
  54        #define USBVISION_AUDIO_IN              0
  55        #define USBVISION_AUDIO_TV              1
  56        #define USBVISION_AUDIO_RADIO           2
  57        #define USBVISION_AUDIO_MUTE            3
  58#define USBVISION_SER_MODE              0x07
  59        #define USBVISION_CLK_OUT               (1 << 0)
  60        #define USBVISION_DAT_IO                (1 << 1)
  61        #define USBVISION_SENS_OUT              (1 << 2)
  62        #define USBVISION_SER_MODE_SOFT         (0 << 4)
  63        #define USBVISION_SER_MODE_SIO          (1 << 4)
  64#define USBVISION_SER_ADRS              0x08
  65#define USBVISION_SER_CONT              0x09
  66#define USBVISION_SER_DAT1              0x0A
  67#define USBVISION_SER_DAT2              0x0B
  68#define USBVISION_SER_DAT3              0x0C
  69#define USBVISION_SER_DAT4              0x0D
  70#define USBVISION_EE_DATA               0x0E
  71#define USBVISION_EE_LSBAD              0x0F
  72#define USBVISION_EE_CONT               0x10
  73#define USBVISION_DRM_CONT                      0x12
  74        #define USBVISION_REF                   (1 << 0)
  75        #define USBVISION_RES_UR                (1 << 2)
  76        #define USBVISION_RES_FDL               (1 << 3)
  77        #define USBVISION_RES_VDW               (1 << 4)
  78#define USBVISION_DRM_PRM1              0x13
  79#define USBVISION_DRM_PRM2              0x14
  80#define USBVISION_DRM_PRM3              0x15
  81#define USBVISION_DRM_PRM4              0x16
  82#define USBVISION_DRM_PRM5              0x17
  83#define USBVISION_DRM_PRM6              0x18
  84#define USBVISION_DRM_PRM7              0x19
  85#define USBVISION_DRM_PRM8              0x1A
  86#define USBVISION_VIN_REG1              0x1B
  87        #define USBVISION_8_422_SYNC            0x01
  88        #define USBVISION_16_422_SYNC           0x02
  89        #define USBVISION_VSNC_POL              (1 << 3)
  90        #define USBVISION_HSNC_POL              (1 << 4)
  91        #define USBVISION_FID_POL               (1 << 5)
  92        #define USBVISION_HVALID_PO             (1 << 6)
  93        #define USBVISION_VCLK_POL              (1 << 7)
  94#define USBVISION_VIN_REG2              0x1C
  95        #define USBVISION_AUTO_FID              (1 << 0)
  96        #define USBVISION_NONE_INTER            (1 << 1)
  97        #define USBVISION_NOHVALID              (1 << 2)
  98        #define USBVISION_UV_ID                 (1 << 3)
  99        #define USBVISION_FIX_2C                (1 << 4)
 100        #define USBVISION_SEND_FID              (1 << 5)
 101        #define USBVISION_KEEP_BLANK            (1 << 7)
 102#define USBVISION_LXSIZE_I              0x1D
 103#define USBVISION_MXSIZE_I              0x1E
 104#define USBVISION_LYSIZE_I              0x1F
 105#define USBVISION_MYSIZE_I              0x20
 106#define USBVISION_LX_OFFST              0x21
 107#define USBVISION_MX_OFFST              0x22
 108#define USBVISION_LY_OFFST              0x23
 109#define USBVISION_MY_OFFST              0x24
 110#define USBVISION_FRM_RATE              0x25
 111#define USBVISION_LXSIZE_O              0x26
 112#define USBVISION_MXSIZE_O              0x27
 113#define USBVISION_LYSIZE_O              0x28
 114#define USBVISION_MYSIZE_O              0x29
 115#define USBVISION_FILT_CONT             0x2A
 116#define USBVISION_VO_MODE               0x2B
 117#define USBVISION_INTRA_CYC             0x2C
 118#define USBVISION_STRIP_SZ              0x2D
 119#define USBVISION_FORCE_INTRA           0x2E
 120#define USBVISION_FORCE_UP              0x2F
 121#define USBVISION_BUF_THR               0x30
 122#define USBVISION_DVI_YUV               0x31
 123#define USBVISION_AUDIO_CONT            0x32
 124#define USBVISION_AUD_PK_LEN            0x33
 125#define USBVISION_BLK_PK_LEN            0x34
 126#define USBVISION_PCM_THR1              0x38
 127#define USBVISION_PCM_THR2              0x39
 128#define USBVISION_DIST_THR_L            0x3A
 129#define USBVISION_DIST_THR_H            0x3B
 130#define USBVISION_MAX_DIST_L            0x3C
 131#define USBVISION_MAX_DIST_H            0x3D
 132#define USBVISION_OP_CODE               0x33
 133
 134#define MAX_BYTES_PER_PIXEL             4
 135
 136#define MIN_FRAME_WIDTH                 64
 137#define MAX_USB_WIDTH                   320  /* 384 */
 138#define MAX_FRAME_WIDTH                 320  /* 384 */                  /* streching sometimes causes crashes*/
 139
 140#define MIN_FRAME_HEIGHT                48
 141#define MAX_USB_HEIGHT                  240  /* 288 */
 142#define MAX_FRAME_HEIGHT                240  /* 288 */                  /* Streching sometimes causes crashes*/
 143
 144#define MAX_FRAME_SIZE                  (MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * MAX_BYTES_PER_PIXEL)
 145#define USBVISION_CLIPMASK_SIZE         (MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT / 8) /* bytesize of clipmask */
 146
 147#define USBVISION_URB_FRAMES            32
 148
 149#define USBVISION_NUM_HEADERMARKER      20
 150#define USBVISION_NUMFRAMES             3  /* Maximum number of frames an application can get */
 151#define USBVISION_NUMSBUF               2 /* Dimensioning the USB S buffering */
 152
 153#define USBVISION_POWEROFF_TIME         (3 * HZ)                /* 3 seconds */
 154
 155
 156#define FRAMERATE_MIN   0
 157#define FRAMERATE_MAX   31
 158
 159enum {
 160        ISOC_MODE_YUV422 = 0x03,
 161        ISOC_MODE_YUV420 = 0x14,
 162        ISOC_MODE_COMPRESS = 0x60,
 163};
 164
 165/* This macro restricts an int variable to an inclusive range */
 166#define RESTRICT_TO_RANGE(v, mi, ma) \
 167        { if (((int)v) < (mi)) (v) = (mi); else if ((v) > (ma)) (v) = (ma); }
 168
 169/*
 170 * We use macros to do YUV -> RGB conversion because this is
 171 * very important for speed and totally unimportant for size.
 172 *
 173 * YUV -> RGB Conversion
 174 * ---------------------
 175 *
 176 * B = 1.164*(Y-16)                 + 2.018*(V-128)
 177 * G = 1.164*(Y-16) - 0.813*(U-128) - 0.391*(V-128)
 178 * R = 1.164*(Y-16) + 1.596*(U-128)
 179 *
 180 * If you fancy integer arithmetics (as you should), hear this:
 181 *
 182 * 65536*B = 76284*(Y-16)                 + 132252*(V-128)
 183 * 65536*G = 76284*(Y-16) -  53281*(U-128) -  25625*(V-128)
 184 * 65536*R = 76284*(Y-16) + 104595*(U-128)
 185 *
 186 * Make sure the output values are within [0..255] range.
 187 */
 188#define LIMIT_RGB(x) (((x) < 0) ? 0 : (((x) > 255) ? 255 : (x)))
 189#define YUV_TO_RGB_BY_THE_BOOK(my, mu, mv, mr, mg, mb) { \
 190        int mm_y, mm_yc, mm_u, mm_v, mm_r, mm_g, mm_b; \
 191        mm_y = (my) - 16; \
 192        mm_u = (mu) - 128; \
 193        mm_v = (mv) - 128; \
 194        mm_yc = mm_y * 76284; \
 195        mm_b = (mm_yc + 132252 * mm_v) >> 16; \
 196        mm_g = (mm_yc - 53281 * mm_u - 25625 * mm_v) >> 16; \
 197        mm_r = (mm_yc + 104595 * mm_u) >> 16; \
 198        mb = LIMIT_RGB(mm_b); \
 199        mg = LIMIT_RGB(mm_g); \
 200        mr = LIMIT_RGB(mm_r); \
 201}
 202
 203/*
 204 * This macro checks if usbvision is still operational. The 'usbvision'
 205 * pointer must be valid, usbvision->dev must be valid, we are not
 206 * removing the device and the device has not erred on us.
 207 */
 208#define USBVISION_IS_OPERATIONAL(udevice) (\
 209        (udevice != NULL) && \
 210        ((udevice)->dev != NULL) && \
 211        ((udevice)->last_error == 0) && \
 212        (!(udevice)->remove_pending))
 213
 214#define I2C_USB_ADAP_MAX        16
 215
 216#define USBVISION_NORMS (V4L2_STD_PAL | V4L2_STD_NTSC | V4L2_STD_SECAM | V4L2_STD_PAL_M)
 217
 218/* ----------------------------------------------------------------- */
 219/* usbvision video structures                                        */
 220/* ----------------------------------------------------------------- */
 221enum scan_state {
 222        scan_state_scanning,    /* Scanning for header */
 223        scan_state_lines        /* Parsing lines */
 224};
 225
 226/* Completion states of the data parser */
 227enum parse_state {
 228        parse_state_continue,   /* Just parse next item */
 229        parse_state_next_frame, /* Frame done, send it to V4L */
 230        parse_state_out,        /* Not enough data for frame */
 231        parse_state_end_parse   /* End parsing */
 232};
 233
 234enum frame_state {
 235        frame_state_unused,     /* Unused (no MCAPTURE) */
 236        frame_state_ready,      /* Ready to start grabbing */
 237        frame_state_grabbing,   /* In the process of being grabbed into */
 238        frame_state_done,       /* Finished grabbing, but not been synced yet */
 239        frame_state_done_hold,  /* Are syncing or reading */
 240        frame_state_error,      /* Something bad happened while processing */
 241};
 242
 243/* stream states */
 244enum stream_state {
 245        stream_off,             /* Driver streaming is completely OFF */
 246        stream_idle,            /* Driver streaming is ready to be put ON by the application */
 247        stream_interrupt,       /* Driver streaming must be interrupted */
 248        stream_on,              /* Driver streaming is put ON by the application */
 249};
 250
 251enum isoc_state {
 252        isoc_state_in_frame,    /* Isoc packet is member of frame */
 253        isoc_state_no_frame,    /* Isoc packet is not member of any frame */
 254};
 255
 256struct usb_device;
 257
 258struct usbvision_sbuf {
 259        char *data;
 260        struct urb *urb;
 261};
 262
 263#define USBVISION_MAGIC_1                       0x55
 264#define USBVISION_MAGIC_2                       0xAA
 265#define USBVISION_HEADER_LENGTH                 0x0c
 266#define USBVISION_SAA7111_ADDR                  0x48
 267#define USBVISION_SAA7113_ADDR                  0x4a
 268#define USBVISION_IIC_LRACK                     0x20
 269#define USBVISION_IIC_LRNACK                    0x30
 270#define USBVISION_FRAME_FORMAT_PARAM_INTRA      (1<<7)
 271
 272struct usbvision_v4l2_format_st {
 273        int             supported;
 274        int             bytes_per_pixel;
 275        int             depth;
 276        int             format;
 277        char            *desc;
 278};
 279#define USBVISION_SUPPORTED_PALETTES ARRAY_SIZE(usbvision_v4l2_format)
 280
 281struct usbvision_frame_header {
 282        unsigned char magic_1;                          /* 0 magic */
 283        unsigned char magic_2;                          /* 1  magic */
 284        unsigned char header_length;                    /* 2 */
 285        unsigned char frame_num;                        /* 3 */
 286        unsigned char frame_phase;                      /* 4 */
 287        unsigned char frame_latency;                    /* 5 */
 288        unsigned char data_format;                      /* 6 */
 289        unsigned char format_param;                     /* 7 */
 290        unsigned char frame_width_lo;                   /* 8 */
 291        unsigned char frame_width_hi;                   /* 9 */
 292        unsigned char frame_height_lo;                  /* 10 */
 293        unsigned char frame_height_hi;                  /* 11 */
 294        __u16 frame_width;                              /* 8 - 9 after endian correction*/
 295        __u16 frame_height;                             /* 10 - 11 after endian correction*/
 296};
 297
 298struct usbvision_frame {
 299        char *data;                                     /* Frame buffer */
 300        struct usbvision_frame_header isoc_header;      /* Header from stream */
 301
 302        int width;                                      /* Width application is expecting */
 303        int height;                                     /* Height */
 304        int index;                                      /* Frame index */
 305        int frmwidth;                                   /* Width the frame actually is */
 306        int frmheight;                                  /* Height */
 307
 308        volatile int grabstate;                         /* State of grabbing */
 309        int scanstate;                                  /* State of scanning */
 310
 311        struct list_head frame;
 312
 313        int curline;                                    /* Line of frame we're working on */
 314
 315        long scanlength;                                /* uncompressed, raw data length of frame */
 316        long bytes_read;                                /* amount of scanlength that has been read from data */
 317        struct usbvision_v4l2_format_st v4l2_format;    /* format the user needs*/
 318        int v4l2_linesize;                              /* bytes for one videoline*/
 319        struct timeval timestamp;
 320        int sequence;                                   /* How many video frames we send to user */
 321};
 322
 323#define CODEC_SAA7113   7113
 324#define CODEC_SAA7111   7111
 325#define CODEC_WEBCAM    3000
 326#define BRIDGE_NT1003   1003
 327#define BRIDGE_NT1004   1004
 328#define BRIDGE_NT1005   1005
 329
 330struct usbvision_device_data_st {
 331        __u64 video_norm;
 332        const char *model_string;
 333        int interface; /* to handle special interface number like BELKIN and Hauppauge WinTV-USB II */
 334        __u16 codec;
 335        unsigned video_channels:3;
 336        unsigned audio_channels:2;
 337        unsigned radio:1;
 338        unsigned vbi:1;
 339        unsigned tuner:1;
 340        unsigned vin_reg1_override:1;   /* Override default value with */
 341        unsigned vin_reg2_override:1;   /* vin_reg1, vin_reg2, etc. */
 342        unsigned dvi_yuv_override:1;
 343        __u8 vin_reg1;
 344        __u8 vin_reg2;
 345        __u8 dvi_yuv;
 346        __u8 tuner_type;
 347        __s16 x_offset;
 348        __s16 y_offset;
 349};
 350
 351/* Declared on usbvision-cards.c */
 352extern struct usbvision_device_data_st usbvision_device_data[];
 353extern struct usb_device_id usbvision_table[];
 354
 355struct usb_usbvision {
 356        struct v4l2_device v4l2_dev;
 357        struct v4l2_ctrl_handler hdl;
 358        struct video_device vdev;                                       /* Video Device */
 359        struct video_device rdev;                                       /* Radio Device */
 360
 361        /* i2c Declaration Section*/
 362        struct i2c_adapter i2c_adap;
 363        int registered_i2c;
 364
 365        struct urb *ctrl_urb;
 366        unsigned char ctrl_urb_buffer[8];
 367        int ctrl_urb_busy;
 368        struct usb_ctrlrequest ctrl_urb_setup;
 369
 370        /* configuration part */
 371        int have_tuner;
 372        int tuner_type;
 373        int bridge_type;                                                /* NT1003, NT1004, NT1005 */
 374        int radio;
 375        int video_inputs;                                               /* # of inputs */
 376        unsigned long radio_freq;
 377        unsigned long tv_freq;
 378        int audio_mute;
 379        int audio_channel;
 380        int isoc_mode;                                                  /* format of video data for the usb isoc-transfer */
 381        unsigned int nr;                                                /* Number of the device */
 382
 383        /* Device structure */
 384        struct usb_device *dev;
 385        /* usb transfer */
 386        int num_alt;            /* Number of alternative settings */
 387        unsigned int *alt_max_pkt_size; /* array of max_packet_size */
 388        unsigned char iface;                                            /* Video interface number */
 389        unsigned char iface_alt;                                        /* Alt settings */
 390        unsigned char vin_reg2_preset;
 391        struct mutex v4l2_lock;
 392        int power;                                                      /* is the device powered on? */
 393        int user;                                                       /* user count for exclusive use */
 394        int initialized;                                                /* Had we already sent init sequence? */
 395        int dev_model;                                                  /* What type of USBVISION device we got? */
 396        enum stream_state streaming;                                    /* Are we streaming Isochronous? */
 397        int last_error;                                                 /* What calamity struck us? */
 398        int curwidth;                                                   /* width of the frame the device is currently set to*/
 399        int curheight;                                                  /* height of the frame the device is currently set to*/
 400        int stretch_width;                                              /* stretch-factor for frame width (from usb to screen)*/
 401        int stretch_height;                                             /* stretch-factor for frame height (from usb to screen)*/
 402        char *fbuf;                                                     /* Videodev buffer area for mmap*/
 403        int max_frame_size;                                             /* Bytes in one video frame */
 404        int fbuf_size;                                                  /* Videodev buffer size */
 405        spinlock_t queue_lock;                                          /* spinlock for protecting mods on inqueue and outqueue */
 406        struct list_head inqueue, outqueue;                             /* queued frame list and ready to dequeue frame list */
 407        wait_queue_head_t wait_frame;                                   /* Processes waiting */
 408        wait_queue_head_t wait_stream;                                  /* Processes waiting */
 409        struct usbvision_frame *cur_frame;                              /* pointer to current frame, set by usbvision_find_header */
 410        struct usbvision_frame frame[USBVISION_NUMFRAMES];              /* frame buffer */
 411        int num_frames;                                                 /* number of frames allocated */
 412        struct usbvision_sbuf sbuf[USBVISION_NUMSBUF];                  /* S buffering */
 413        volatile int remove_pending;                                    /* If set then about to exit */
 414
 415        /* Scratch space from the Isochronous Pipe.*/
 416        unsigned char *scratch;
 417        int scratch_read_ptr;
 418        int scratch_write_ptr;
 419        int scratch_headermarker[USBVISION_NUM_HEADERMARKER];
 420        int scratch_headermarker_read_ptr;
 421        int scratch_headermarker_write_ptr;
 422        enum isoc_state isocstate;
 423        struct usbvision_v4l2_format_st palette;
 424
 425        struct v4l2_capability vcap;                                    /* Video capabilities */
 426        unsigned int ctl_input;                                         /* selected input */
 427        v4l2_std_id tvnorm_id;                                          /* selected tv norm */
 428        unsigned char video_endp;                                       /* 0x82 for USBVISION devices based */
 429
 430        /* Decompression stuff: */
 431        unsigned char *intra_frame_buffer;                              /* Buffer for reference frame */
 432        int block_pos;                                                  /* for test only */
 433        int request_intra;                                              /* 0 = normal; 1 = intra frame is requested; */
 434        int last_isoc_frame_num;                                        /* check for lost isoc frames */
 435        int isoc_packet_size;                                           /* need to calculate used_bandwidth */
 436        int used_bandwidth;                                             /* used bandwidth 0-100%, need to set compr_level */
 437        int compr_level;                                                /* How strong (100) or weak (0) is compression */
 438        int last_compr_level;                                           /* How strong (100) or weak (0) was compression */
 439        int usb_bandwidth;                                              /* Mbit/s */
 440
 441        /* Statistics that can be overlayed on the screen */
 442        unsigned long isoc_urb_count;                   /* How many URBs we received so far */
 443        unsigned long urb_length;                       /* Length of last URB */
 444        unsigned long isoc_data_count;                  /* How many bytes we received */
 445        unsigned long header_count;                     /* How many frame headers we found */
 446        unsigned long scratch_ovf_count;                /* How many times we overflowed scratch */
 447        unsigned long isoc_skip_count;                  /* How many empty ISO packets received */
 448        unsigned long isoc_err_count;                   /* How many bad ISO packets received */
 449        unsigned long isoc_packet_count;                /* How many packets we totally got */
 450        unsigned long time_in_irq;                      /* How long do we need for interrupt */
 451        int isoc_measure_bandwidth_count;
 452        int frame_num;                                  /* How many video frames we send to user */
 453        int max_strip_len;                              /* How big is the biggest strip */
 454        int comprblock_pos;
 455        int strip_len_errors;                           /* How many times was block_pos greater than strip_len */
 456        int strip_magic_errors;
 457        int strip_line_number_errors;
 458        int compr_block_types[4];
 459};
 460
 461static inline struct usb_usbvision *to_usbvision(struct v4l2_device *v4l2_dev)
 462{
 463        return container_of(v4l2_dev, struct usb_usbvision, v4l2_dev);
 464}
 465
 466#define call_all(usbvision, o, f, args...) \
 467        v4l2_device_call_all(&usbvision->v4l2_dev, 0, o, f, ##args)
 468
 469/* --------------------------------------------------------------- */
 470/* defined in usbvision-i2c.c                                      */
 471/* i2c-algo-usb declaration                                        */
 472/* --------------------------------------------------------------- */
 473
 474/* ----------------------------------------------------------------------- */
 475/* usbvision specific I2C functions                                        */
 476/* ----------------------------------------------------------------------- */
 477int usbvision_i2c_register(struct usb_usbvision *usbvision);
 478int usbvision_i2c_unregister(struct usb_usbvision *usbvision);
 479
 480/* defined in usbvision-core.c                                      */
 481int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg);
 482int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
 483                        unsigned char value);
 484
 485int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames);
 486void usbvision_frames_free(struct usb_usbvision *usbvision);
 487int usbvision_scratch_alloc(struct usb_usbvision *usbvision);
 488void usbvision_scratch_free(struct usb_usbvision *usbvision);
 489int usbvision_decompress_alloc(struct usb_usbvision *usbvision);
 490void usbvision_decompress_free(struct usb_usbvision *usbvision);
 491
 492int usbvision_setup(struct usb_usbvision *usbvision, int format);
 493int usbvision_init_isoc(struct usb_usbvision *usbvision);
 494int usbvision_restart_isoc(struct usb_usbvision *usbvision);
 495void usbvision_stop_isoc(struct usb_usbvision *usbvision);
 496int usbvision_set_alternate(struct usb_usbvision *dev);
 497
 498int usbvision_set_audio(struct usb_usbvision *usbvision, int audio_channel);
 499int usbvision_audio_off(struct usb_usbvision *usbvision);
 500
 501int usbvision_begin_streaming(struct usb_usbvision *usbvision);
 502void usbvision_empty_framequeues(struct usb_usbvision *dev);
 503int usbvision_stream_interrupt(struct usb_usbvision *dev);
 504
 505int usbvision_muxsel(struct usb_usbvision *usbvision, int channel);
 506int usbvision_set_input(struct usb_usbvision *usbvision);
 507int usbvision_set_output(struct usb_usbvision *usbvision, int width, int height);
 508
 509int usbvision_power_off(struct usb_usbvision *usbvision);
 510int usbvision_power_on(struct usb_usbvision *usbvision);
 511
 512#endif                                                                  /* __LINUX_USBVISION_H */
 513