release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/staging/easycap/easycap.h

   1 /*****************************************************************************
   2 *                                                                            *
   3 *  easycap.h                                                                 *
   4 *                                                                            *
   5 *****************************************************************************/
   6 /*
   7  *
   8  *  Copyright (C) 2010 R.M. Thomas  <rmthomas@sciolus.org>
   9  *
  10  *
  11  *  This is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation; either version 2 of the License, or
  14  *  (at your option) any later version.
  15  *
  16  *  The software is distributed in the hope that it will be useful,
  17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *  GNU General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License
  22  *  along with this software; if not, write to the Free Software
  23  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  24  *
  25 */
  26 /*****************************************************************************/
  27 /*---------------------------------------------------------------------------*/
  28 /*
  29  *  THE FOLLOWING PARAMETERS ARE UNDEFINED:
  30  *
  31  *                EASYCAP_DEBUG
  32  *                EASYCAP_IS_VIDEODEV_CLIENT
  33  *                EASYCAP_NEEDS_USBVIDEO_H
  34  *                EASYCAP_NEEDS_V4L2_DEVICE_H
  35  *                EASYCAP_NEEDS_V4L2_FOPS
  36  *
  37  *  IF REQUIRED THEY MUST BE EXTERNALLY DEFINED, FOR EXAMPLE AS COMPILER
  38  *  OPTIONS.
  39  */
  40 /*---------------------------------------------------------------------------*/
  41
  42 #if !defined(EASYCAP_H)
  43 #define EASYCAP_H
  44
  45 #if defined(EASYCAP_DEBUG)
  46 #if (9 < EASYCAP_DEBUG)
  47 #error Debug levels 0 to 9 are okay.\
  48   To achieve higher levels, remove this trap manually from easycap.h
  49 #endif
  50 #endif /*EASYCAP_DEBUG*/
  51 /*---------------------------------------------------------------------------*/
  52 /*
  53  *  THESE ARE FOR MAINTENANCE ONLY - NORMALLY UNDEFINED:
  54  */
  55 /*---------------------------------------------------------------------------*/
  56 #undef  PREFER_NTSC
  57 #undef  EASYCAP_TESTCARD
  58 #undef  EASYCAP_TESTTONE
  59 #undef  LOCKFRAME
  60 #undef  NOREADBACK
  61 #undef  AUDIOTIME
  62 /*---------------------------------------------------------------------------*/
  63 /*
  64  *
  65  *  DEFINE   BRIDGER   TO ACTIVATE THE ROUTINE FOR BRIDGING VIDEOTAPE DROPOUTS.
  66  *
  67  *             *** UNDER DEVELOPMENT/TESTING - NOT READY YET!***
  68  *
  69  */
  70 /*---------------------------------------------------------------------------*/
  71 #undef  BRIDGER
  72 /*---------------------------------------------------------------------------*/
  73
  74 #include <linux/kernel.h>
  75 #include <linux/errno.h>
  76 #include <linux/init.h>
  77 #include <linux/slab.h>
  78 #include <linux/module.h>
  79 #include <linux/kref.h>
  80 #include <linux/smp_lock.h>
  81 #include <linux/usb.h>
  82 #include <linux/uaccess.h>
  83
  84 #include <linux/i2c.h>
  85 #include <linux/version.h>
  86 #include <linux/workqueue.h>
  87 #include <linux/poll.h>
  88 #include <linux/mm.h>
  89 #include <linux/fs.h>
  90 #include <linux/delay.h>
  91 #include <linux/types.h>
  92
  93 /*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/
  94 #if defined(EASYCAP_IS_VIDEODEV_CLIENT)
  95 #if !defined(__OLD_VIDIOC_)
  96 #define __OLD_VIDIOC_
  97 #endif /* !defined(__OLD_VIDIOC_) */
  98
  99 #include <media/v4l2-dev.h>
 100
 101 #if defined(EASYCAP_NEEDS_V4L2_DEVICE_H)
 102 #include <media/v4l2-device.h>
 103 #endif /*EASYCAP_NEEDS_V4L2_DEVICE_H*/
 104 #endif /*EASYCAP_IS_VIDEODEV_CLIENT*/
 105 /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
 106
 107 #if !defined(__OLD_VIDIOC_)
 108 #define __OLD_VIDIOC_
 109 #endif /* !defined(__OLD_VIDIOC_) */
 110 #include <linux/videodev2.h>
 111
 112 #include <linux/soundcard.h>
 113
 114 #if defined(EASYCAP_NEEDS_USBVIDEO_H)
 115 #include <config/video/usbvideo.h>
 116 #endif /*EASYCAP_NEEDS_USBVIDEO_H*/
 117
 118 #if !defined(PAGE_SIZE)
 119 #error "PAGE_SIZE not defined"
 120 #endif
 121
 122 #define STRINGIZE_AGAIN(x) #x
 123 #define STRINGIZE(x) STRINGIZE_AGAIN(x)
 124
 125 /*---------------------------------------------------------------------------*/
 126 /*  VENDOR, PRODUCT:  Syntek Semiconductor Co., Ltd
 127  *
 128  *      EITHER        EasyCAP USB 2.0 Video Adapter with Audio, Model No. DC60
 129  *               with input cabling:  AUDIO(L), AUDIO(R), CVBS, S-VIDEO.
 130  *
 131  *          OR        EasyCAP 4CHANNEL USB 2.0 DVR, Model No. EasyCAP002
 132  *               with input cabling:  MICROPHONE, CVBS1, CVBS2, CVBS3, CVBS4.
 133  */
 134 /*---------------------------------------------------------------------------*/
 135 #define USB_EASYCAP_VENDOR_ID   0x05e1
 136 #define USB_EASYCAP_PRODUCT_ID  0x0408
 137
 138 #define EASYCAP_DRIVER_VERSION "0.8.21"
 139 #define EASYCAP_DRIVER_DESCRIPTION "easycapdc60"
 140
 141 #define USB_SKEL_MINOR_BASE     192
 142 #define VIDEO_DEVICE_MANY 8
 143
 144 /*---------------------------------------------------------------------------*/
 145 /*
 146  *  DEFAULT LUMINANCE, CONTRAST, SATURATION AND HUE
 147  */
 148 /*---------------------------------------------------------------------------*/
 149 #define SAA_0A_DEFAULT 0x7F
 150 #define SAA_0B_DEFAULT 0x3F
 151 #define SAA_0C_DEFAULT 0x2F
 152 #define SAA_0D_DEFAULT 0x00
 153 /*---------------------------------------------------------------------------*/
 154 /*
 155  *  VIDEO STREAMING PARAMETERS:
 156  *  USB 2.0 PROVIDES FOR HIGH-BANDWIDTH ENDPOINTS WITH AN UPPER LIMIT
 157  *  OF 3072 BYTES PER MICROFRAME for wMaxPacketSize.
 158  */
 159 /*---------------------------------------------------------------------------*/
 160 #define VIDEO_ISOC_BUFFER_MANY 16
 161 #define VIDEO_ISOC_ORDER 3
 162 #define VIDEO_ISOC_FRAMESPERDESC ((unsigned int) 1 << VIDEO_ISOC_ORDER)
 163 #define USB_2_0_MAXPACKETSIZE 3072
 164 #if (USB_2_0_MAXPACKETSIZE > PAGE_SIZE)
 165 #error video_isoc_buffer[.] will not be big enough
 166 #endif
 167 /*---------------------------------------------------------------------------*/
 168 /*
 169  *  VIDEO BUFFERS
 170  */
 171 /*---------------------------------------------------------------------------*/
 172 #define FIELD_BUFFER_SIZE (203 * PAGE_SIZE)
 173 #define FRAME_BUFFER_SIZE (405 * PAGE_SIZE)
 174 #define FIELD_BUFFER_MANY 4
 175 #define FRAME_BUFFER_MANY 6
 176 /*---------------------------------------------------------------------------*/
 177 /*
 178  *  AUDIO STREAMING PARAMETERS
 179  */
 180 /*---------------------------------------------------------------------------*/
 181 #define AUDIO_ISOC_BUFFER_MANY 16
 182 #define AUDIO_ISOC_ORDER 3
 183 #define AUDIO_ISOC_BUFFER_SIZE (PAGE_SIZE << AUDIO_ISOC_ORDER)
 184 /*---------------------------------------------------------------------------*/
 185 /*
 186  *  AUDIO BUFFERS
 187  */
 188 /*---------------------------------------------------------------------------*/
 189 #define AUDIO_FRAGMENT_MANY 32
 190 /*---------------------------------------------------------------------------*/
 191 /*
 192  *  IT IS ESSENTIAL THAT EVEN-NUMBERED STANDARDS ARE 25 FRAMES PER SECOND,
 193  *                        ODD-NUMBERED STANDARDS ARE 30 FRAMES PER SECOND.
 194  *  THE NUMBERING OF STANDARDS MUST NOT BE CHANGED WITHOUT DUE CARE.  NOT
 195  *  ONLY MUST THE PARAMETER
 196  *                             STANDARD_MANY
 197  *  BE CHANGED TO CORRESPOND TO THE NEW NUMBER OF STANDARDS, BUT ALSO THE
 198  *  NUMBERING MUST REMAIN AN UNBROKEN ASCENDING SEQUENCE:  DUMMY STANDARDS
 199  *  MAY NEED TO BE ADDED.   APPROPRIATE CHANGES WILL ALWAYS BE REQUIRED IN
 200  *  ROUTINE fillin_formats() AND POSSIBLY ELSEWHERE.  BEWARE.
 201  */
 202 /*---------------------------------------------------------------------------*/
 203 #define  PAL_BGHIN      0
 204 #define  PAL_Nc         2
 205 #define  SECAM          4
 206 #define  NTSC_N         6
 207 #define  NTSC_N_443     8
 208 #define  NTSC_M         1
 209 #define  NTSC_443       3
 210 #define  NTSC_M_JP      5
 211 #define  PAL_60         7
 212 #define  PAL_M          9
 213 #define  STANDARD_MANY 10
 214 /*---------------------------------------------------------------------------*/
 215 /*
 216  *  ENUMS
 217  */
 218 /*---------------------------------------------------------------------------*/
 219 enum {
 220 AT_720x576,
 221 AT_704x576,
 222 AT_640x480,
 223 AT_720x480,
 224 AT_360x288,
 225 AT_320x240,
 226 AT_360x240,
 227 RESOLUTION_MANY
 228 };
 229 enum {
 230 FMT_UYVY,
 231 FMT_YUY2,
 232 FMT_RGB24,
 233 FMT_RGB32,
 234 FMT_BGR24,
 235 FMT_BGR32,
 236 PIXELFORMAT_MANY
 237 };
 238 enum {
 239 FIELD_NONE,
 240 FIELD_INTERLACED,
 241 FIELD_ALTERNATE,
 242 INTERLACE_MANY
 243 };
 244 #define SETTINGS_MANY   (STANDARD_MANY * \
 245                         RESOLUTION_MANY * \
 246                         2 * \
 247                         PIXELFORMAT_MANY * \
 248                         INTERLACE_MANY)
 249 /*---------------------------------------------------------------------------*/
 250 /*
 251  *  STRUCTURE DEFINITIONS
 252  */
 253 /*---------------------------------------------------------------------------*/
 254 struct data_buffer {
 255 struct list_head list_head;
 256 void *pgo;
 257 void *pto;
 258 __u16 kount;
 259 };
 260 /*---------------------------------------------------------------------------*/
 261 struct data_urb {
 262 struct list_head list_head;
 263 struct urb *purb;
 264 int isbuf;
 265 int length;
 266 };
 267 /*---------------------------------------------------------------------------*/
 268 struct easycap_standard {
 269 __u16 mask;
 270 struct v4l2_standard v4l2_standard;
 271 };
 272 struct easycap_format {
 273 __u16 mask;
 274 char name[128];
 275 struct v4l2_format v4l2_format;
 276 };
 277 /*---------------------------------------------------------------------------*/
 278 /*
 279  *   easycap.ilk == 0   =>  CVBS+S-VIDEO HARDWARE, AUDIO wMaxPacketSize=256
 280  *   easycap.ilk == 2   =>  CVBS+S-VIDEO HARDWARE, AUDIO wMaxPacketSize=9
 281  *   easycap.ilk == 3   =>     FOUR-CVBS HARDWARE, AUDIO wMaxPacketSize=9
 282  */
 283 /*---------------------------------------------------------------------------*/
 284 struct easycap {
 285 unsigned int audio_pages_per_fragment;
 286 unsigned int audio_bytes_per_fragment;
 287 unsigned int audio_buffer_page_many;
 288
 289 #define UPSAMPLE
 290 #if defined(UPSAMPLE)
 291 __s16 oldaudio;
 292 #endif /*UPSAMPLE*/
 293
 294 struct easycap_format easycap_format[1 + SETTINGS_MANY];
 295
 296 int ilk;
 297 bool microphone;
 298
 299 /*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/
 300 #if defined(EASYCAP_IS_VIDEODEV_CLIENT)
 301 struct video_device *pvideo_device;
 302 #endif /*EASYCAP_IS_VIDEODEV_CLIENT*/
 303 /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
 304
 305 struct usb_device *pusb_device;
 306 struct usb_interface *pusb_interface;
 307
 308 struct kref kref;
 309
 310 struct mutex mutex_mmap_video[FRAME_BUFFER_MANY];
 311 struct mutex mutex_timeval0;
 312 struct mutex mutex_timeval1;
 313
 314 int queued[FRAME_BUFFER_MANY];
 315 int done[FRAME_BUFFER_MANY];
 316
 317 wait_queue_head_t wq_video;
 318 wait_queue_head_t wq_audio;
 319
 320 int input;
 321 int polled;
 322 int standard_offset;
 323 int format_offset;
 324
 325 int fps;
 326 int usec;
 327 int tolerate;
 328 int merit[180];
 329
 330 struct timeval timeval0;
 331 struct timeval timeval1;
 332 struct timeval timeval2;
 333 struct timeval timeval7;
 334 long long int dnbydt;
 335
 336 int    video_interface;
 337 int    video_altsetting_on;
 338 int    video_altsetting_off;
 339 int    video_endpointnumber;
 340 int    video_isoc_maxframesize;
 341 int    video_isoc_buffer_size;
 342 int    video_isoc_framesperdesc;
 343
 344 int    video_isoc_streaming;
 345 int    video_isoc_sequence;
 346 int    video_idle;
 347 int    video_eof;
 348 int    video_junk;
 349
 350 int    fudge;
 351
 352 struct data_buffer video_isoc_buffer[VIDEO_ISOC_BUFFER_MANY];
 353 struct data_buffer \
 354              field_buffer[FIELD_BUFFER_MANY][(FIELD_BUFFER_SIZE/PAGE_SIZE)];
 355 struct data_buffer \
 356              frame_buffer[FRAME_BUFFER_MANY][(FRAME_BUFFER_SIZE/PAGE_SIZE)];
 357
 358 struct list_head urb_video_head;
 359 struct list_head *purb_video_head;
 360
 361 int vma_many;
 362
 363 /*---------------------------------------------------------------------------*/
 364 /*
 365  *  BUFFER INDICATORS
 366  */
 367 /*---------------------------------------------------------------------------*/
 368 int field_fill;         /* Field buffer being filled by easycap_complete().  */
 369                         /*   Bumped only by easycap_complete().              */
 370 int field_page;         /* Page of field buffer page being filled by         */
 371                         /*   easycap_complete().                             */
 372 int field_read;         /* Field buffer to be read by field2frame().         */
 373                         /*   Bumped only by easycap_complete().              */
 374 int frame_fill;         /* Frame buffer being filled by field2frame().       */
 375                         /*   Bumped only by easycap_dqbuf() when             */
 376                         /*   field2frame() has created a complete frame.     */
 377 int frame_read;         /* Frame buffer offered to user by DQBUF.            */
 378                         /*   Set only by easycap_dqbuf() to trail frame_fill.*/
 379 int frame_lock;         /* Flag set to 1 by DQBUF and cleared by QBUF        */
 380 /*---------------------------------------------------------------------------*/
 381 /*
 382  *  IMAGE PROPERTIES
 383  */
 384 /*---------------------------------------------------------------------------*/
 385 __u32                   pixelformat;
 386 __u32                   field;
 387 int                     width;
 388 int                     height;
 389 int                     bytesperpixel;
 390 bool                    byteswaporder;
 391 bool                    decimatepixel;
 392 bool                    offerfields;
 393 int                     frame_buffer_used;
 394 int                     frame_buffer_many;
 395 int                     videofieldamount;
 396
 397 int                     brightness;
 398 int                     contrast;
 399 int                     saturation;
 400 int                     hue;
 401
 402 int allocation_video_urb;
 403 int allocation_video_page;
 404 int allocation_video_struct;
 405 int registered_video;
 406 /*---------------------------------------------------------------------------*/
 407 /*
 408  *  SOUND PROPERTIES
 409  */
 410 /*---------------------------------------------------------------------------*/
 411 int audio_interface;
 412 int audio_altsetting_on;
 413 int audio_altsetting_off;
 414 int audio_endpointnumber;
 415 int audio_isoc_maxframesize;
 416 int audio_isoc_buffer_size;
 417 int audio_isoc_framesperdesc;
 418
 419 int audio_isoc_streaming;
 420 int audio_idle;
 421 int audio_eof;
 422 int volume;
 423 int mute;
 424
 425 struct data_buffer audio_isoc_buffer[AUDIO_ISOC_BUFFER_MANY];
 426
 427 struct list_head urb_audio_head;
 428 struct list_head *purb_audio_head;
 429 /*---------------------------------------------------------------------------*/
 430 /*
 431  *  BUFFER INDICATORS
 432  */
 433 /*---------------------------------------------------------------------------*/
 434 int audio_fill;         /* Audio buffer being filled by easysnd_complete().  */
 435                         /*   Bumped only by easysnd_complete().              */
 436 int audio_read;         /* Audio buffer page being read by easysnd_read().   */
 437                         /*   Set by easysnd_read() to trail audio_fill by    */
 438                         /*   one fragment.                                   */
 439 /*---------------------------------------------------------------------------*/
 440 /*
 441  *  SOUND PROPERTIES
 442  */
 443 /*---------------------------------------------------------------------------*/
 444
 445 int audio_buffer_many;
 446
 447 int allocation_audio_urb;
 448 int allocation_audio_page;
 449 int allocation_audio_struct;
 450 int registered_audio;
 451
 452 long long int audio_sample;
 453 long long int audio_niveau;
 454 long long int audio_square;
 455
 456 struct data_buffer audio_buffer[];
 457 };
 458 /*---------------------------------------------------------------------------*/
 459 /*
 460  *  VIDEO FUNCTION PROTOTYPES
 461  */
 462 /*---------------------------------------------------------------------------*/
 463 void             easycap_complete(struct urb *);
 464 int              easycap_open(struct inode *, struct file *);
 465 int              easycap_release(struct inode *, struct file *);
 466 long             easycap_ioctl(struct file *, unsigned int,  unsigned long);
 467
 468 /*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/
 469 #if defined(EASYCAP_IS_VIDEODEV_CLIENT)
 470 int              easycap_open_noinode(struct file *);
 471 int              easycap_release_noinode(struct file *);
 472 int              videodev_release(struct video_device *);
 473 #endif /*EASYCAP_IS_VIDEODEV_CLIENT*/
 474 /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
 475
 476 unsigned int     easycap_poll(struct file *, poll_table *);
 477 int              easycap_mmap(struct file *, struct vm_area_struct *);
 478 int              easycap_usb_probe(struct usb_interface *, \
 479                                                 const struct usb_device_id *);
 480 void             easycap_usb_disconnect(struct usb_interface *);
 481 void             easycap_delete(struct kref *);
 482
 483 void             easycap_vma_open(struct vm_area_struct *);
 484 void             easycap_vma_close(struct vm_area_struct *);
 485 int              easycap_vma_fault(struct vm_area_struct *, struct vm_fault *);
 486 int              easycap_dqbuf(struct easycap *, int);
 487 int              submit_video_urbs(struct easycap *);
 488 int              kill_video_urbs(struct easycap *);
 489 int              field2frame(struct easycap *);
 490 int              redaub(struct easycap *, void *, void *, \
 491                                                 int, int, __u8, __u8, bool);
 492 void             debrief(struct easycap *);
 493 void             sayreadonly(struct easycap *);
 494 void             easycap_testcard(struct easycap *, int);
 495 int              explain_ioctl(__u32);
 496 int              explain_cid(__u32);
 497 int              fillin_formats(void);
 498 int              adjust_standard(struct easycap *, v4l2_std_id);
 499 int              adjust_format(struct easycap *, __u32, __u32, __u32, \
 500                                                                 int, bool);
 501 int              adjust_brightness(struct easycap *, int);
 502 int              adjust_contrast(struct easycap *, int);
 503 int              adjust_saturation(struct easycap *, int);
 504 int              adjust_hue(struct easycap *, int);
 505 int              adjust_volume(struct easycap *, int);
 506 /*---------------------------------------------------------------------------*/
 507 /*
 508  *  AUDIO FUNCTION PROTOTYPES
 509  */
 510 /*---------------------------------------------------------------------------*/
 511 void             easysnd_complete(struct urb *);
 512 ssize_t          easysnd_read(struct file *, char __user *, size_t, loff_t *);
 513 int              easysnd_open(struct inode *, struct file *);
 514 int              easysnd_release(struct inode *, struct file *);
 515 long             easysnd_ioctl(struct file *, unsigned int,  unsigned long);
 516 unsigned int     easysnd_poll(struct file *, poll_table *);
 517 void             easysnd_delete(struct kref *);
 518 int              submit_audio_urbs(struct easycap *);
 519 int              kill_audio_urbs(struct easycap *);
 520 void             easysnd_testtone(struct easycap *, int);
 521 int              audio_setup(struct easycap *);
 522 /*---------------------------------------------------------------------------*/
 523 /*
 524  *  LOW-LEVEL FUNCTION PROTOTYPES
 525  */
 526 /*---------------------------------------------------------------------------*/
 527 int              audio_gainget(struct usb_device *);
 528 int              audio_gainset(struct usb_device *, __s8);
 529
 530 int              set_interface(struct usb_device *, __u16);
 531 int              wakeup_device(struct usb_device *);
 532 int              confirm_resolution(struct usb_device *);
 533 int              confirm_stream(struct usb_device *);
 534
 535 int              setup_stk(struct usb_device *);
 536 int              setup_saa(struct usb_device *);
 537 int              setup_vt(struct usb_device *);
 538 int              check_stk(struct usb_device *);
 539 int              check_saa(struct usb_device *);
 540 int              ready_saa(struct usb_device *);
 541 int              merit_saa(struct usb_device *);
 542 int              check_vt(struct usb_device *);
 543 int              select_input(struct usb_device *, int, int);
 544 int              set_resolution(struct usb_device *, \
 545                                                 __u16, __u16, __u16, __u16);
 546
 547 int              read_saa(struct usb_device *, __u16);
 548 int              read_stk(struct usb_device *, __u32);
 549 int              write_saa(struct usb_device *, __u16, __u16);
 550 int              wait_i2c(struct usb_device *);
 551 int              write_000(struct usb_device *, __u16, __u16);
 552 int              start_100(struct usb_device *);
 553 int              stop_100(struct usb_device *);
 554 int              write_300(struct usb_device *);
 555 int              read_vt(struct usb_device *, __u16);
 556 int              write_vt(struct usb_device *, __u16, __u16);
 557
 558 int              set2to78(struct usb_device *);
 559 int              set2to93(struct usb_device *);
 560
 561 int              regset(struct usb_device *, __u16, __u16);
 562 int              regget(struct usb_device *, __u16, void *);
 563 /*---------------------------------------------------------------------------*/
 564 struct signed_div_result {
 565 long long int quotient;
 566 unsigned long long int remainder;
 567 } signed_div(long long int, long long int);
 568 /*---------------------------------------------------------------------------*/
 569 /*
 570  *  MACROS
 571  */
 572 /*---------------------------------------------------------------------------*/
 573 #define GET(X, Y, Z) do { \
 574         int rc; \
 575         *(Z) = (__u16)0; \
 576         rc = regget(X, Y, Z); \
 577         if (0 > rc) { \
 578                 JOT(8, ":-(%i\n", __LINE__);  return(rc); \
 579         } \
 580 } while (0)
 581
 582 #define SET(X, Y, Z) do { \
 583         int rc; \
 584         rc = regset(X, Y, Z); \
 585         if (0 > rc) { \
 586                 JOT(8, ":-(%i\n", __LINE__);  return(rc); \
 587         } \
 588 } while (0)
 589 /*---------------------------------------------------------------------------*/
 590
 591 #define SAY(format, args...) do { \
 592         printk(KERN_DEBUG "easycap: %s: " format, __func__, ##args); \
 593 } while (0)
 594
 595
 596 #if defined(EASYCAP_DEBUG)
 597 #define JOT(n, format, args...) do { \
 598         if (n <= easycap_debug) { \
 599                 printk(KERN_DEBUG "easycap: %s: " format, __func__, ##args); \
 600         } \
 601 } while (0)
 602 #else
 603 #define JOT(n, format, args...) do {} while (0)
 604 #endif /*EASYCAP_DEBUG*/
 605
 606 #define POUT JOT(8, ":-(in file %s line %4i\n", __FILE__, __LINE__)
 607
 608 #define MICROSECONDS(X, Y) \
 609                         ((1000000*((long long int)(X.tv_sec - Y.tv_sec))) + \
 610                                         (long long int)(X.tv_usec - Y.tv_usec))
 611
 612 /*---------------------------------------------------------------------------*/
 613 /*
 614  *  (unsigned char *)P           pointer to next byte pair
 615  *       (long int *)X           pointer to accumulating count
 616  *       (long int *)Y           pointer to accumulating sum
 617  *  (long long int *)Z           pointer to accumulating sum of squares
 618  */
 619 /*---------------------------------------------------------------------------*/
 620 #define SUMMER(P, X, Y, Z) do {                                 \
 621         unsigned char *p;                                    \
 622         unsigned int u0, u1, u2;                             \
 623         long int s;                                          \
 624         p = (unsigned char *)(P);                            \
 625         u0 = (unsigned int) (*p);                            \
 626         u1 = (unsigned int) (*(p + 1));                      \
 627         u2 = (unsigned int) ((u1 << 8) | u0);                \
 628         if (0x8000 & u2)                                     \
 629                 s = -(long int)(0x7FFF & (~u2));             \
 630         else                                                 \
 631                 s =  (long int)(0x7FFF & u2);                \
 632         *((X)) += (long int) 1;                              \
 633         *((Y)) += (long int) s;                              \
 634         *((Z)) += ((long long int)(s) * (long long int)(s)); \
 635 } while (0)
 636 /*---------------------------------------------------------------------------*/
 637
 638 #endif /*EASYCAP_H*/