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  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  28  */
  29
  30
  31 #ifndef __LINUX_USBVISION_H
  32 #define __LINUX_USBVISION_H
  33
  34 #include <linux/list.h>
  35 #include <linux/usb.h>
  36 #include <linux/i2c.h>
  37 #include <linux/mutex.h>
  38 #include <media/v4l2-device.h>
  39 #include <media/v4l2-ctrls.h>
  40 #include <media/tuner.h>
  41 #include <linux/videodev2.h>
  42
  43 #define USBVISION_DEBUG         /* Turn on debug messages */
  44
  45 #define USBVISION_PWR_REG               0x00
  46         #define USBVISION_SSPND_EN              (1 << 1)
  47         #define USBVISION_RES2                  (1 << 2)
  48         #define USBVISION_PWR_VID               (1 << 5)
  49         #define USBVISION_E2_EN                 (1 << 7)
  50 #define USBVISION_CONFIG_REG            0x01
  51 #define USBVISION_ADRS_REG              0x02
  52 #define USBVISION_ALTER_REG             0x03
  53 #define USBVISION_FORCE_ALTER_REG       0x04
  54 #define USBVISION_STATUS_REG            0x05
  55 #define USBVISION_IOPIN_REG             0x06
  56         #define USBVISION_IO_1                  (1 << 0)
  57         #define USBVISION_IO_2                  (1 << 1)
  58         #define USBVISION_AUDIO_IN              0
  59         #define USBVISION_AUDIO_TV              1
  60         #define USBVISION_AUDIO_RADIO           2
  61         #define USBVISION_AUDIO_MUTE            3
  62 #define USBVISION_SER_MODE              0x07
  63         #define USBVISION_CLK_OUT               (1 << 0)
  64         #define USBVISION_DAT_IO                (1 << 1)
  65         #define USBVISION_SENS_OUT              (1 << 2)
  66         #define USBVISION_SER_MODE_SOFT         (0 << 4)
  67         #define USBVISION_SER_MODE_SIO          (1 << 4)
  68 #define USBVISION_SER_ADRS              0x08
  69 #define USBVISION_SER_CONT              0x09
  70 #define USBVISION_SER_DAT1              0x0A
  71 #define USBVISION_SER_DAT2              0x0B
  72 #define USBVISION_SER_DAT3              0x0C
  73 #define USBVISION_SER_DAT4              0x0D
  74 #define USBVISION_EE_DATA               0x0E
  75 #define USBVISION_EE_LSBAD              0x0F
  76 #define USBVISION_EE_CONT               0x10
  77 #define USBVISION_DRM_CONT                      0x12
  78         #define USBVISION_REF                   (1 << 0)
  79         #define USBVISION_RES_UR                (1 << 2)
  80         #define USBVISION_RES_FDL               (1 << 3)
  81         #define USBVISION_RES_VDW               (1 << 4)
  82 #define USBVISION_DRM_PRM1              0x13
  83 #define USBVISION_DRM_PRM2              0x14
  84 #define USBVISION_DRM_PRM3              0x15
  85 #define USBVISION_DRM_PRM4              0x16
  86 #define USBVISION_DRM_PRM5              0x17
  87 #define USBVISION_DRM_PRM6              0x18
  88 #define USBVISION_DRM_PRM7              0x19
  89 #define USBVISION_DRM_PRM8              0x1A
  90 #define USBVISION_VIN_REG1              0x1B
  91         #define USBVISION_8_422_SYNC            0x01
  92         #define USBVISION_16_422_SYNC           0x02
  93         #define USBVISION_VSNC_POL              (1 << 3)
  94         #define USBVISION_HSNC_POL              (1 << 4)
  95         #define USBVISION_FID_POL               (1 << 5)
  96         #define USBVISION_HVALID_PO             (1 << 6)
  97         #define USBVISION_VCLK_POL              (1 << 7)
  98 #define USBVISION_VIN_REG2              0x1C
  99         #define USBVISION_AUTO_FID              (1 << 0)
 100         #define USBVISION_NONE_INTER            (1 << 1)
 101         #define USBVISION_NOHVALID              (1 << 2)
 102         #define USBVISION_UV_ID                 (1 << 3)
 103         #define USBVISION_FIX_2C                (1 << 4)
 104         #define USBVISION_SEND_FID              (1 << 5)
 105         #define USBVISION_KEEP_BLANK            (1 << 7)
 106 #define USBVISION_LXSIZE_I              0x1D
 107 #define USBVISION_MXSIZE_I              0x1E
 108 #define USBVISION_LYSIZE_I              0x1F
 109 #define USBVISION_MYSIZE_I              0x20
 110 #define USBVISION_LX_OFFST              0x21
 111 #define USBVISION_MX_OFFST              0x22
 112 #define USBVISION_LY_OFFST              0x23
 113 #define USBVISION_MY_OFFST              0x24
 114 #define USBVISION_FRM_RATE              0x25
 115 #define USBVISION_LXSIZE_O              0x26
 116 #define USBVISION_MXSIZE_O              0x27
 117 #define USBVISION_LYSIZE_O              0x28
 118 #define USBVISION_MYSIZE_O              0x29
 119 #define USBVISION_FILT_CONT             0x2A
 120 #define USBVISION_VO_MODE               0x2B
 121 #define USBVISION_INTRA_CYC             0x2C
 122 #define USBVISION_STRIP_SZ              0x2D
 123 #define USBVISION_FORCE_INTRA           0x2E
 124 #define USBVISION_FORCE_UP              0x2F
 125 #define USBVISION_BUF_THR               0x30
 126 #define USBVISION_DVI_YUV               0x31
 127 #define USBVISION_AUDIO_CONT            0x32
 128 #define USBVISION_AUD_PK_LEN            0x33
 129 #define USBVISION_BLK_PK_LEN            0x34
 130 #define USBVISION_PCM_THR1              0x38
 131 #define USBVISION_PCM_THR2              0x39
 132 #define USBVISION_DIST_THR_L            0x3A
 133 #define USBVISION_DIST_THR_H            0x3B
 134 #define USBVISION_MAX_DIST_L            0x3C
 135 #define USBVISION_MAX_DIST_H            0x3D
 136 #define USBVISION_OP_CODE               0x33
 137
 138 #define MAX_BYTES_PER_PIXEL             4
 139
 140 #define MIN_FRAME_WIDTH                 64
 141 #define MAX_USB_WIDTH                   320  /* 384 */
 142 #define MAX_FRAME_WIDTH                 320  /* 384 */                  /* streching sometimes causes crashes*/
 143
 144 #define MIN_FRAME_HEIGHT                48
 145 #define MAX_USB_HEIGHT                  240  /* 288 */
 146 #define MAX_FRAME_HEIGHT                240  /* 288 */                  /* Streching sometimes causes crashes*/
 147
 148 #define MAX_FRAME_SIZE                  (MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * MAX_BYTES_PER_PIXEL)
 149 #define USBVISION_CLIPMASK_SIZE         (MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT / 8) /* bytesize of clipmask */
 150
 151 #define USBVISION_URB_FRAMES            32
 152
 153 #define USBVISION_NUM_HEADERMARKER      20
 154 #define USBVISION_NUMFRAMES             3  /* Maximum number of frames an application can get */
 155 #define USBVISION_NUMSBUF               2 /* Dimensioning the USB S buffering */
 156
 157 #define USBVISION_POWEROFF_TIME         (3 * HZ)                /* 3 seconds */
 158
 159
 160 #define FRAMERATE_MIN   0
 161 #define FRAMERATE_MAX   31
 162
 163 enum {
 164         ISOC_MODE_YUV422 = 0x03,
 165         ISOC_MODE_YUV420 = 0x14,
 166         ISOC_MODE_COMPRESS = 0x60,
 167 };
 168
 169 /* This macro restricts an int variable to an inclusive range */
 170 #define RESTRICT_TO_RANGE(v, mi, ma) \
 171         { if (((int)v) < (mi)) (v) = (mi); else if ((v) > (ma)) (v) = (ma); }
 172
 173 /*
 174  * We use macros to do YUV -> RGB conversion because this is
 175  * very important for speed and totally unimportant for size.
 176  *
 177  * YUV -> RGB Conversion
 178  * ---------------------
 179  *
 180  * B = 1.164*(Y-16)                 + 2.018*(V-128)
 181  * G = 1.164*(Y-16) - 0.813*(U-128) - 0.391*(V-128)
 182  * R = 1.164*(Y-16) + 1.596*(U-128)
 183  *
 184  * If you fancy integer arithmetics (as you should), hear this:
 185  *
 186  * 65536*B = 76284*(Y-16)                 + 132252*(V-128)
 187  * 65536*G = 76284*(Y-16) -  53281*(U-128) -  25625*(V-128)
 188  * 65536*R = 76284*(Y-16) + 104595*(U-128)
 189  *
 190  * Make sure the output values are within [0..255] range.
 191  */
 192 #define LIMIT_RGB(x) (((x) < 0) ? 0 : (((x) > 255) ? 255 : (x)))
 193 #define YUV_TO_RGB_BY_THE_BOOK(my, mu, mv, mr, mg, mb) { \
 194         int mm_y, mm_yc, mm_u, mm_v, mm_r, mm_g, mm_b; \
 195         mm_y = (my) - 16; \
 196         mm_u = (mu) - 128; \
 197         mm_v = (mv) - 128; \
 198         mm_yc = mm_y * 76284; \
 199         mm_b = (mm_yc + 132252 * mm_v) >> 16; \
 200         mm_g = (mm_yc - 53281 * mm_u - 25625 * mm_v) >> 16; \
 201         mm_r = (mm_yc + 104595 * mm_u) >> 16; \
 202         mb = LIMIT_RGB(mm_b); \
 203         mg = LIMIT_RGB(mm_g); \
 204         mr = LIMIT_RGB(mm_r); \
 205 }
 206
 207 /*
 208  * This macro checks if usbvision is still operational. The 'usbvision'
 209  * pointer must be valid, usbvision->dev must be valid, we are not
 210  * removing the device and the device has not erred on us.
 211  */
 212 #define USBVISION_IS_OPERATIONAL(udevice) (\
 213         (udevice != NULL) && \
 214         ((udevice)->dev != NULL) && \
 215         ((udevice)->last_error == 0) && \
 216         (!(udevice)->remove_pending))
 217
 218 #define I2C_USB_ADAP_MAX        16
 219
 220 #define USBVISION_NORMS (V4L2_STD_PAL | V4L2_STD_NTSC | V4L2_STD_SECAM | V4L2_STD_PAL_M)
 221
 222 /* ----------------------------------------------------------------- */
 223 /* usbvision video structures                                        */
 224 /* ----------------------------------------------------------------- */
 225 enum scan_state {
 226         scan_state_scanning,    /* Scanning for header */
 227         scan_state_lines        /* Parsing lines */
 228 };
 229
 230 /* Completion states of the data parser */
 231 enum parse_state {
 232         parse_state_continue,   /* Just parse next item */
 233         parse_state_next_frame, /* Frame done, send it to V4L */
 234         parse_state_out,        /* Not enough data for frame */
 235         parse_state_end_parse   /* End parsing */
 236 };
 237
 238 enum frame_state {
 239         frame_state_unused,     /* Unused (no MCAPTURE) */
 240         frame_state_ready,      /* Ready to start grabbing */
 241         frame_state_grabbing,   /* In the process of being grabbed into */
 242         frame_state_done,       /* Finished grabbing, but not been synced yet */
 243         frame_state_done_hold,  /* Are syncing or reading */
 244         frame_state_error,      /* Something bad happened while processing */
 245 };
 246
 247 /* stream states */
 248 enum stream_state {
 249         stream_off,             /* Driver streaming is completely OFF */
 250         stream_idle,            /* Driver streaming is ready to be put ON by the application */
 251         stream_interrupt,       /* Driver streaming must be interrupted */
 252         stream_on,              /* Driver streaming is put ON by the application */
 253 };
 254
 255 enum isoc_state {
 256         isoc_state_in_frame,    /* Isoc packet is member of frame */
 257         isoc_state_no_frame,    /* Isoc packet is not member of any frame */
 258 };
 259
 260 struct usb_device;
 261
 262 struct usbvision_sbuf {
 263         char *data;
 264         struct urb *urb;
 265 };
 266
 267 #define USBVISION_MAGIC_1                       0x55
 268 #define USBVISION_MAGIC_2                       0xAA
 269 #define USBVISION_HEADER_LENGTH                 0x0c
 270 #define USBVISION_SAA7111_ADDR                  0x48
 271 #define USBVISION_SAA7113_ADDR                  0x4a
 272 #define USBVISION_IIC_LRACK                     0x20
 273 #define USBVISION_IIC_LRNACK                    0x30
 274 #define USBVISION_FRAME_FORMAT_PARAM_INTRA      (1<<7)
 275
 276 struct usbvision_v4l2_format_st {
 277         int             supported;
 278         int             bytes_per_pixel;
 279         int             depth;
 280         int             format;
 281         char            *desc;
 282 };
 283 #define USBVISION_SUPPORTED_PALETTES ARRAY_SIZE(usbvision_v4l2_format)
 284
 285 struct usbvision_frame_header {
 286         unsigned char magic_1;                          /* 0 magic */
 287         unsigned char magic_2;                          /* 1  magic */
 288         unsigned char header_length;                    /* 2 */
 289         unsigned char frame_num;                        /* 3 */
 290         unsigned char frame_phase;                      /* 4 */
 291         unsigned char frame_latency;                    /* 5 */
 292         unsigned char data_format;                      /* 6 */
 293         unsigned char format_param;                     /* 7 */
 294         unsigned char frame_width_lo;                   /* 8 */
 295         unsigned char frame_width_hi;                   /* 9 */
 296         unsigned char frame_height_lo;                  /* 10 */
 297         unsigned char frame_height_hi;                  /* 11 */
 298         __u16 frame_width;                              /* 8 - 9 after endian correction*/
 299         __u16 frame_height;                             /* 10 - 11 after endian correction*/
 300 };
 301
 302 struct usbvision_frame {
 303         char *data;                                     /* Frame buffer */
 304         struct usbvision_frame_header isoc_header;      /* Header from stream */
 305
 306         int width;                                      /* Width application is expecting */
 307         int height;                                     /* Height */
 308         int index;                                      /* Frame index */
 309         int frmwidth;                                   /* Width the frame actually is */
 310         int frmheight;                                  /* Height */
 311
 312         volatile int grabstate;                         /* State of grabbing */
 313         int scanstate;                                  /* State of scanning */
 314
 315         struct list_head frame;
 316
 317         int curline;                                    /* Line of frame we're working on */
 318
 319         long scanlength;                                /* uncompressed, raw data length of frame */
 320         long bytes_read;                                /* amount of scanlength that has been read from data */
 321         struct usbvision_v4l2_format_st v4l2_format;    /* format the user needs*/
 322         int v4l2_linesize;                              /* bytes for one videoline*/
 323         struct timeval timestamp;
 324         int sequence;                                   /* How many video frames we send to user */
 325 };
 326
 327 #define CODEC_SAA7113   7113
 328 #define CODEC_SAA7111   7111
 329 #define CODEC_WEBCAM    3000
 330 #define BRIDGE_NT1003   1003
 331 #define BRIDGE_NT1004   1004
 332 #define BRIDGE_NT1005   1005
 333
 334 struct usbvision_device_data_st {
 335         __u64 video_norm;
 336         const char *model_string;
 337         int interface; /* to handle special interface number like BELKIN and Hauppauge WinTV-USB II */
 338         __u16 codec;
 339         unsigned video_channels:3;
 340         unsigned audio_channels:2;
 341         unsigned radio:1;
 342         unsigned vbi:1;
 343         unsigned tuner:1;
 344         unsigned vin_reg1_override:1;   /* Override default value with */
 345         unsigned vin_reg2_override:1;   /* vin_reg1, vin_reg2, etc. */
 346         unsigned dvi_yuv_override:1;
 347         __u8 vin_reg1;
 348         __u8 vin_reg2;
 349         __u8 dvi_yuv;
 350         __u8 tuner_type;
 351         __s16 x_offset;
 352         __s16 y_offset;
 353 };
 354
 355 /* Declared on usbvision-cards.c */
 356 extern struct usbvision_device_data_st usbvision_device_data[];
 357 extern struct usb_device_id usbvision_table[];
 358
 359 struct usb_usbvision {
 360         struct v4l2_device v4l2_dev;
 361         struct v4l2_ctrl_handler hdl;
 362         struct video_device vdev;                                       /* Video Device */
 363         struct video_device rdev;                                       /* Radio Device */
 364
 365         /* i2c Declaration Section*/
 366         struct i2c_adapter i2c_adap;
 367         int registered_i2c;
 368
 369         struct urb *ctrl_urb;
 370         unsigned char ctrl_urb_buffer[8];
 371         int ctrl_urb_busy;
 372         struct usb_ctrlrequest ctrl_urb_setup;
 373         wait_queue_head_t ctrl_urb_wq;                                  /* Processes waiting */
 374
 375         /* configuration part */
 376         int have_tuner;
 377         int tuner_type;
 378         int bridge_type;                                                /* NT1003, NT1004, NT1005 */
 379         int radio;
 380         int video_inputs;                                               /* # of inputs */
 381         unsigned long radio_freq;
 382         unsigned long tv_freq;
 383         int audio_mute;
 384         int audio_channel;
 385         int isoc_mode;                                                  /* format of video data for the usb isoc-transfer */
 386         unsigned int nr;                                                /* Number of the device */
 387
 388         /* Device structure */
 389         struct usb_device *dev;
 390         /* usb transfer */
 391         int num_alt;            /* Number of alternative settings */
 392         unsigned int *alt_max_pkt_size; /* array of max_packet_size */
 393         unsigned char iface;                                            /* Video interface number */
 394         unsigned char iface_alt;                                        /* Alt settings */
 395         unsigned char vin_reg2_preset;
 396         struct mutex v4l2_lock;
 397         int power;                                                      /* is the device powered on? */
 398         int user;                                                       /* user count for exclusive use */
 399         int initialized;                                                /* Had we already sent init sequence? */
 400         int dev_model;                                                  /* What type of USBVISION device we got? */
 401         enum stream_state streaming;                                    /* Are we streaming Isochronous? */
 402         int last_error;                                                 /* What calamity struck us? */
 403         int curwidth;                                                   /* width of the frame the device is currently set to*/
 404         int curheight;                                                  /* height of the frame the device is currently set to*/
 405         int stretch_width;                                              /* stretch-factor for frame width (from usb to screen)*/
 406         int stretch_height;                                             /* stretch-factor for frame height (from usb to screen)*/
 407         char *fbuf;                                                     /* Videodev buffer area for mmap*/
 408         int max_frame_size;                                             /* Bytes in one video frame */
 409         int fbuf_size;                                                  /* Videodev buffer size */
 410         spinlock_t queue_lock;                                          /* spinlock for protecting mods on inqueue and outqueue */
 411         struct list_head inqueue, outqueue;                             /* queued frame list and ready to dequeue frame list */
 412         wait_queue_head_t wait_frame;                                   /* Processes waiting */
 413         wait_queue_head_t wait_stream;                                  /* Processes waiting */
 414         struct usbvision_frame *cur_frame;                              /* pointer to current frame, set by usbvision_find_header */
 415         struct usbvision_frame frame[USBVISION_NUMFRAMES];              /* frame buffer */
 416         int num_frames;                                                 /* number of frames allocated */
 417         struct usbvision_sbuf sbuf[USBVISION_NUMSBUF];                  /* S buffering */
 418         volatile int remove_pending;                                    /* If set then about to exit */
 419
 420         /* Scratch space from the Isochronous Pipe.*/
 421         unsigned char *scratch;
 422         int scratch_read_ptr;
 423         int scratch_write_ptr;
 424         int scratch_headermarker[USBVISION_NUM_HEADERMARKER];
 425         int scratch_headermarker_read_ptr;
 426         int scratch_headermarker_write_ptr;
 427         enum isoc_state isocstate;
 428         struct usbvision_v4l2_format_st palette;
 429
 430         struct v4l2_capability vcap;                                    /* Video capabilities */
 431         unsigned int ctl_input;                                         /* selected input */
 432         v4l2_std_id tvnorm_id;                                          /* selected tv norm */
 433         unsigned char video_endp;                                       /* 0x82 for USBVISION devices based */
 434
 435         /* Decompression stuff: */
 436         unsigned char *intra_frame_buffer;                              /* Buffer for reference frame */
 437         int block_pos;                                                  /* for test only */
 438         int request_intra;                                              /* 0 = normal; 1 = intra frame is requested; */
 439         int last_isoc_frame_num;                                        /* check for lost isoc frames */
 440         int isoc_packet_size;                                           /* need to calculate used_bandwidth */
 441         int used_bandwidth;                                             /* used bandwidth 0-100%, need to set compr_level */
 442         int compr_level;                                                /* How strong (100) or weak (0) is compression */
 443         int last_compr_level;                                           /* How strong (100) or weak (0) was compression */
 444         int usb_bandwidth;                                              /* Mbit/s */
 445
 446         /* Statistics that can be overlayed on the screen */
 447         unsigned long isoc_urb_count;                   /* How many URBs we received so far */
 448         unsigned long urb_length;                       /* Length of last URB */
 449         unsigned long isoc_data_count;                  /* How many bytes we received */
 450         unsigned long header_count;                     /* How many frame headers we found */
 451         unsigned long scratch_ovf_count;                /* How many times we overflowed scratch */
 452         unsigned long isoc_skip_count;                  /* How many empty ISO packets received */
 453         unsigned long isoc_err_count;                   /* How many bad ISO packets received */
 454         unsigned long isoc_packet_count;                /* How many packets we totally got */
 455         unsigned long time_in_irq;                      /* How long do we need for interrupt */
 456         int isoc_measure_bandwidth_count;
 457         int frame_num;                                  /* How many video frames we send to user */
 458         int max_strip_len;                              /* How big is the biggest strip */
 459         int comprblock_pos;
 460         int strip_len_errors;                           /* How many times was block_pos greater than strip_len */
 461         int strip_magic_errors;
 462         int strip_line_number_errors;
 463         int compr_block_types[4];
 464 };
 465
 466 static inline struct usb_usbvision *to_usbvision(struct v4l2_device *v4l2_dev)
 467 {
 468         return container_of(v4l2_dev, struct usb_usbvision, v4l2_dev);
 469 }
 470
 471 #define call_all(usbvision, o, f, args...) \
 472         v4l2_device_call_all(&usbvision->v4l2_dev, 0, o, f, ##args)
 473
 474 /* --------------------------------------------------------------- */
 475 /* defined in usbvision-i2c.c                                      */
 476 /* i2c-algo-usb declaration                                        */
 477 /* --------------------------------------------------------------- */
 478
 479 /* ----------------------------------------------------------------------- */
 480 /* usbvision specific I2C functions                                        */
 481 /* ----------------------------------------------------------------------- */
 482 int usbvision_i2c_register(struct usb_usbvision *usbvision);
 483 int usbvision_i2c_unregister(struct usb_usbvision *usbvision);
 484
 485 /* defined in usbvision-core.c                                      */
 486 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg);
 487 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
 488                         unsigned char value);
 489
 490 int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames);
 491 void usbvision_frames_free(struct usb_usbvision *usbvision);
 492 int usbvision_scratch_alloc(struct usb_usbvision *usbvision);
 493 void usbvision_scratch_free(struct usb_usbvision *usbvision);
 494 int usbvision_decompress_alloc(struct usb_usbvision *usbvision);
 495 void usbvision_decompress_free(struct usb_usbvision *usbvision);
 496
 497 int usbvision_setup(struct usb_usbvision *usbvision, int format);
 498 int usbvision_init_isoc(struct usb_usbvision *usbvision);
 499 int usbvision_restart_isoc(struct usb_usbvision *usbvision);
 500 void usbvision_stop_isoc(struct usb_usbvision *usbvision);
 501 int usbvision_set_alternate(struct usb_usbvision *dev);
 502
 503 int usbvision_set_audio(struct usb_usbvision *usbvision, int audio_channel);
 504 int usbvision_audio_off(struct usb_usbvision *usbvision);
 505
 506 int usbvision_begin_streaming(struct usb_usbvision *usbvision);
 507 void usbvision_empty_framequeues(struct usb_usbvision *dev);
 508 int usbvision_stream_interrupt(struct usb_usbvision *dev);
 509
 510 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel);
 511 int usbvision_set_input(struct usb_usbvision *usbvision);
 512 int usbvision_set_output(struct usb_usbvision *usbvision, int width, int height);
 513
 514 int usbvision_power_off(struct usb_usbvision *usbvision);
 515 int usbvision_power_on(struct usb_usbvision *usbvision);
 516
 517 #endif                                                                  /* __LINUX_USBVISION_H */