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 #ifndef __EASYCAP_H__
  43 #define __EASYCAP_H__
  44
  45 /*---------------------------------------------------------------------------*/
  46 /*
  47  *  THESE ARE NORMALLY DEFINED
  48  */
  49 /*---------------------------------------------------------------------------*/
  50 #define  PATIENCE  500
  51 #define  PERSEVERE
  52 /*---------------------------------------------------------------------------*/
  53 /*
  54  *  THESE ARE FOR MAINTENANCE ONLY - NORMALLY UNDEFINED:
  55  */
  56 /*---------------------------------------------------------------------------*/
  57 #undef  EASYCAP_TESTCARD
  58 #ifdef CONFIG_EASYCAP_OSS
  59 #undef  EASYCAP_TESTTONE
  60 #endif /* CONFIG_EASYCAP_OSS */
  61 /*---------------------------------------------------------------------------*/
  62 #include <linux/kernel.h>
  63 #include <linux/errno.h>
  64 #include <linux/init.h>
  65 #include <linux/slab.h>
  66 #include <linux/module.h>
  67 #include <linux/kref.h>
  68 #include <linux/usb.h>
  69 #include <linux/uaccess.h>
  70
  71 #include <linux/i2c.h>
  72 #include <linux/version.h>
  73 #include <linux/workqueue.h>
  74 #include <linux/poll.h>
  75 #include <linux/mm.h>
  76 #include <linux/fs.h>
  77 #include <linux/delay.h>
  78 #include <linux/types.h>
  79
  80 #ifndef CONFIG_EASYCAP_OSS
  81 #include <linux/vmalloc.h>
  82 #include <linux/sound.h>
  83 #include <sound/core.h>
  84 #include <sound/pcm.h>
  85 #include <sound/pcm_params.h>
  86 #include <sound/info.h>
  87 #include <sound/initval.h>
  88 #include <sound/control.h>
  89 #endif /* !CONFIG_EASYCAP_OSS */
  90 /*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/
  91 #ifdef EASYCAP_IS_VIDEODEV_CLIENT
  92 #include <media/v4l2-dev.h>
  93 #ifdef EASYCAP_NEEDS_V4L2_DEVICE_H
  94 #include <media/v4l2-device.h>
  95 #endif /*EASYCAP_NEEDS_V4L2_DEVICE_H*/
  96 #endif /*EASYCAP_IS_VIDEODEV_CLIENT*/
  97 /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
  98 #include <linux/videodev2.h>
  99 #include <linux/soundcard.h>
 100 #ifdef EASYCAP_NEEDS_USBVIDEO_H
 101 #include <config/video/usbvideo.h>
 102 #endif /*EASYCAP_NEEDS_USBVIDEO_H*/
 103
 104 #ifndef PAGE_SIZE
 105 #error "PAGE_SIZE not defined"
 106 #endif /* PAGE_SIZE */
 107
 108 /*---------------------------------------------------------------------------*/
 109 /*  VENDOR, PRODUCT:  Syntek Semiconductor Co., Ltd
 110  *
 111  *      EITHER        EasyCAP USB 2.0 Video Adapter with Audio, Model No. DC60
 112  *               with input cabling:  AUDIO(L), AUDIO(R), CVBS, S-VIDEO.
 113  *
 114  *          OR        EasyCAP 4CHANNEL USB 2.0 DVR, Model No. EasyCAP002
 115  *               with input cabling:  MICROPHONE, CVBS1, CVBS2, CVBS3, CVBS4.
 116  */
 117 /*---------------------------------------------------------------------------*/
 118 #define USB_EASYCAP_VENDOR_ID   0x05e1
 119 #define USB_EASYCAP_PRODUCT_ID  0x0408
 120
 121 #define EASYCAP_DRIVER_VERSION "0.9.01"
 122 #define EASYCAP_DRIVER_DESCRIPTION "easycapdc60"
 123
 124 #define USB_SKEL_MINOR_BASE     192
 125 #define DONGLE_MANY 8
 126 #define INPUT_MANY 6
 127 /*---------------------------------------------------------------------------*/
 128 /*
 129  *  DEFAULT LUMINANCE, CONTRAST, SATURATION AND HUE
 130  */
 131 /*---------------------------------------------------------------------------*/
 132 #define SAA_0A_DEFAULT 0x7F
 133 #define SAA_0B_DEFAULT 0x3F
 134 #define SAA_0C_DEFAULT 0x2F
 135 #define SAA_0D_DEFAULT 0x00
 136 /*---------------------------------------------------------------------------*/
 137 /*
 138  *  VIDEO STREAMING PARAMETERS:
 139  *  USB 2.0 PROVIDES FOR HIGH-BANDWIDTH ENDPOINTS WITH AN UPPER LIMIT
 140  *  OF 3072 BYTES PER MICROFRAME for wMaxPacketSize.
 141  */
 142 /*---------------------------------------------------------------------------*/
 143 #define VIDEO_ISOC_BUFFER_MANY 16
 144 #define VIDEO_ISOC_ORDER 3
 145 #define VIDEO_ISOC_FRAMESPERDESC ((unsigned int) 1 << VIDEO_ISOC_ORDER)
 146 #define USB_2_0_MAXPACKETSIZE 3072
 147 #if (USB_2_0_MAXPACKETSIZE > PAGE_SIZE)
 148 #error video_isoc_buffer[.] will not be big enough
 149 #endif
 150 #define VIDEO_JUNK_TOLERATE VIDEO_ISOC_BUFFER_MANY
 151 #define VIDEO_LOST_TOLERATE 50
 152 /*---------------------------------------------------------------------------*/
 153 /*
 154  *  VIDEO BUFFERS
 155  */
 156 /*---------------------------------------------------------------------------*/
 157 #define FIELD_BUFFER_SIZE (203 * PAGE_SIZE)
 158 #define FRAME_BUFFER_SIZE (405 * PAGE_SIZE)
 159 #define FIELD_BUFFER_MANY 4
 160 #define FRAME_BUFFER_MANY 6
 161 /*---------------------------------------------------------------------------*/
 162 /*
 163  *  AUDIO STREAMING PARAMETERS
 164  */
 165 /*---------------------------------------------------------------------------*/
 166 #define AUDIO_ISOC_BUFFER_MANY 16
 167 #define AUDIO_ISOC_ORDER 1
 168 #define AUDIO_ISOC_FRAMESPERDESC 32
 169 #define AUDIO_ISOC_BUFFER_SIZE (PAGE_SIZE << AUDIO_ISOC_ORDER)
 170 /*---------------------------------------------------------------------------*/
 171 /*
 172  *  AUDIO BUFFERS
 173  */
 174 /*---------------------------------------------------------------------------*/
 175 #define AUDIO_FRAGMENT_MANY 32
 176 #define PAGES_PER_AUDIO_FRAGMENT 4
 177 /*---------------------------------------------------------------------------*/
 178 /*
 179  *  IT IS ESSENTIAL THAT EVEN-NUMBERED STANDARDS ARE 25 FRAMES PER SECOND,
 180  *                        ODD-NUMBERED STANDARDS ARE 30 FRAMES PER SECOND.
 181  *  THE NUMBERING OF STANDARDS MUST NOT BE CHANGED WITHOUT DUE CARE.  NOT
 182  *  ONLY MUST THE PARAMETER
 183  *                             STANDARD_MANY
 184  *  BE CHANGED TO CORRESPOND TO THE NEW NUMBER OF STANDARDS, BUT ALSO THE
 185  *  NUMBERING MUST REMAIN AN UNBROKEN ASCENDING SEQUENCE:  DUMMY STANDARDS
 186  *  MAY NEED TO BE ADDED.   APPROPRIATE CHANGES WILL ALWAYS BE REQUIRED IN
 187  *  ROUTINE fillin_formats() AND POSSIBLY ELSEWHERE.  BEWARE.
 188  */
 189 /*---------------------------------------------------------------------------*/
 190 #define  PAL_BGHIN      0
 191 #define  PAL_Nc         2
 192 #define  SECAM          4
 193 #define  NTSC_N         6
 194 #define  NTSC_N_443     8
 195 #define  NTSC_M         1
 196 #define  NTSC_443       3
 197 #define  NTSC_M_JP      5
 198 #define  PAL_60         7
 199 #define  PAL_M          9
 200 #define  PAL_BGHIN_SLOW    10
 201 #define  PAL_Nc_SLOW       12
 202 #define  SECAM_SLOW        14
 203 #define  NTSC_N_SLOW       16
 204 #define  NTSC_N_443_SLOW   18
 205 #define  NTSC_M_SLOW       11
 206 #define  NTSC_443_SLOW     13
 207 #define  NTSC_M_JP_SLOW    15
 208 #define  PAL_60_SLOW       17
 209 #define  PAL_M_SLOW        19
 210 #define  STANDARD_MANY 20
 211 /*---------------------------------------------------------------------------*/
 212 /*
 213  *  ENUMS
 214  */
 215 /*---------------------------------------------------------------------------*/
 216 enum {
 217         AT_720x576,
 218         AT_704x576,
 219         AT_640x480,
 220         AT_720x480,
 221         AT_360x288,
 222         AT_320x240,
 223         AT_360x240,
 224         RESOLUTION_MANY
 225 };
 226 enum {
 227         FMT_UYVY,
 228         FMT_YUY2,
 229         FMT_RGB24,
 230         FMT_RGB32,
 231         FMT_BGR24,
 232         FMT_BGR32,
 233         PIXELFORMAT_MANY
 234 };
 235 enum {
 236         FIELD_NONE,
 237         FIELD_INTERLACED,
 238         INTERLACE_MANY
 239 };
 240 #define SETTINGS_MANY   (STANDARD_MANY * \
 241                         RESOLUTION_MANY * \
 242                         2 * \
 243                         PIXELFORMAT_MANY * \
 244                         INTERLACE_MANY)
 245 /*---------------------------------------------------------------------------*/
 246 /*
 247  *  STRUCTURE DEFINITIONS
 248  */
 249 /*---------------------------------------------------------------------------*/
 250 struct easycap_dongle {
 251         struct easycap *peasycap;
 252         struct mutex mutex_video;
 253         struct mutex mutex_audio;
 254 };
 255 /*---------------------------------------------------------------------------*/
 256 struct data_buffer {
 257         struct list_head list_head;
 258         void *pgo;
 259         void *pto;
 260         u16 kount;
 261         u16 input;
 262 };
 263 /*---------------------------------------------------------------------------*/
 264 struct data_urb {
 265         struct list_head list_head;
 266         struct urb *purb;
 267         int isbuf;
 268         int length;
 269 };
 270 /*---------------------------------------------------------------------------*/
 271 struct easycap_standard {
 272         u16 mask;
 273 struct v4l2_standard v4l2_standard;
 274 };
 275 struct easycap_format {
 276         u16 mask;
 277         char name[128];
 278 struct v4l2_format v4l2_format;
 279 };
 280 struct inputset {
 281         int input;
 282         int input_ok;
 283         int standard_offset;
 284         int standard_offset_ok;
 285         int format_offset;
 286         int format_offset_ok;
 287         int brightness;
 288         int brightness_ok;
 289         int contrast;
 290         int contrast_ok;
 291         int saturation;
 292         int saturation_ok;
 293         int hue;
 294         int hue_ok;
 295 };
 296 /*---------------------------------------------------------------------------*/
 297 /*
 298  *   easycap.ilk == 0   =>  CVBS+S-VIDEO HARDWARE, AUDIO wMaxPacketSize=256
 299  *   easycap.ilk == 2   =>  CVBS+S-VIDEO HARDWARE, AUDIO wMaxPacketSize=9
 300  *   easycap.ilk == 3   =>     FOUR-CVBS HARDWARE, AUDIO wMaxPacketSize=9
 301  */
 302 /*---------------------------------------------------------------------------*/
 303 struct easycap {
 304 #define TELLTALE "expectedstring"
 305         char telltale[16];
 306         int isdongle;
 307         int minor;
 308
 309 /*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/
 310 #ifdef EASYCAP_IS_VIDEODEV_CLIENT
 311         struct video_device video_device;
 312 #ifdef EASYCAP_NEEDS_V4L2_DEVICE_H
 313         struct v4l2_device v4l2_device;
 314 #endif /*EASYCAP_NEEDS_V4L2_DEVICE_H*/
 315 #endif /*EASYCAP_IS_VIDEODEV_CLIENT*/
 316 /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
 317         int status;
 318         unsigned int audio_pages_per_fragment;
 319         unsigned int audio_bytes_per_fragment;
 320         unsigned int audio_buffer_page_many;
 321
 322 #define UPSAMPLE
 323 #ifdef UPSAMPLE
 324         s16 oldaudio;
 325 #endif /*UPSAMPLE*/
 326
 327         int ilk;
 328         bool microphone;
 329
 330         struct usb_device *pusb_device;
 331         struct usb_interface *pusb_interface;
 332
 333         struct kref kref;
 334
 335         int queued[FRAME_BUFFER_MANY];
 336         int done[FRAME_BUFFER_MANY];
 337
 338         wait_queue_head_t wq_video;
 339         wait_queue_head_t wq_audio;
 340         wait_queue_head_t wq_trigger;
 341
 342         int input;
 343         int polled;
 344         int standard_offset;
 345         int format_offset;
 346         struct inputset inputset[INPUT_MANY];
 347
 348         bool ntsc;
 349         int fps;
 350         int usec;
 351         int tolerate;
 352         int skip;
 353         int skipped;
 354         int lost[INPUT_MANY];
 355         int merit[180];
 356
 357         struct timeval timeval0;
 358         struct timeval timeval1;
 359         struct timeval timeval2;
 360         struct timeval timeval3;
 361         struct timeval timeval6;
 362         struct timeval timeval7;
 363         struct timeval timeval8;
 364         long long int dnbydt;
 365
 366         int    video_interface;
 367         int    video_altsetting_on;
 368         int    video_altsetting_off;
 369         int    video_endpointnumber;
 370         int    video_isoc_maxframesize;
 371         int    video_isoc_buffer_size;
 372         int    video_isoc_framesperdesc;
 373
 374         int    video_isoc_streaming;
 375         int    video_isoc_sequence;
 376         int    video_idle;
 377         int    video_eof;
 378         int    video_junk;
 379
 380         struct data_buffer video_isoc_buffer[VIDEO_ISOC_BUFFER_MANY];
 381         struct data_buffer field_buffer[FIELD_BUFFER_MANY]
 382                                         [(FIELD_BUFFER_SIZE/PAGE_SIZE)];
 383         struct data_buffer frame_buffer[FRAME_BUFFER_MANY]
 384                                         [(FRAME_BUFFER_SIZE/PAGE_SIZE)];
 385
 386         struct list_head urb_video_head;
 387         struct list_head *purb_video_head;
 388
 389         u8 cache[8];
 390         u8 *pcache;
 391         int video_mt;
 392         int audio_mt;
 393         long long audio_bytes;
 394         u32 isequence;
 395
 396         int vma_many;
 397 /*---------------------------------------------------------------------------*/
 398 /*
 399  *  BUFFER INDICATORS
 400  */
 401 /*---------------------------------------------------------------------------*/
 402         int field_fill; /* Field buffer being filled by easycap_complete().  */
 403                         /*   Bumped only by easycap_complete().              */
 404         int field_page; /* Page of field buffer page being filled by         */
 405                         /*   easycap_complete().                             */
 406         int field_read; /* Field buffer to be read by field2frame().         */
 407                         /*   Bumped only by easycap_complete().              */
 408         int frame_fill; /* Frame buffer being filled by field2frame().       */
 409                         /*   Bumped only by easycap_dqbuf() when             */
 410                         /*   field2frame() has created a complete frame.     */
 411         int frame_read; /* Frame buffer offered to user by DQBUF.            */
 412                         /*   Set only by easycap_dqbuf() to trail frame_fill.*/
 413         int frame_lock; /* Flag set to 1 by DQBUF and cleared by QBUF        */
 414 /*---------------------------------------------------------------------------*/
 415 /*
 416  *  IMAGE PROPERTIES
 417  */
 418 /*---------------------------------------------------------------------------*/
 419         u32                   pixelformat;
 420         int                     width;
 421         int                     height;
 422         int                     bytesperpixel;
 423         bool                    byteswaporder;
 424         bool                    decimatepixel;
 425         bool                    offerfields;
 426         int                     frame_buffer_used;
 427         int                     frame_buffer_many;
 428         int                     videofieldamount;
 429
 430         int                     brightness;
 431         int                     contrast;
 432         int                     saturation;
 433         int                     hue;
 434
 435         int allocation_video_urb;
 436         int allocation_video_page;
 437         int allocation_video_struct;
 438         int registered_video;
 439 /*---------------------------------------------------------------------------*/
 440 /*
 441  *  ALSA
 442  */
 443 /*---------------------------------------------------------------------------*/
 444 #ifndef CONFIG_EASYCAP_OSS
 445         struct snd_pcm_hardware alsa_hardware;
 446         struct snd_card *psnd_card;
 447         struct snd_pcm *psnd_pcm;
 448         struct snd_pcm_substream *psubstream;
 449         int dma_fill;
 450         int dma_next;
 451         int dma_read;
 452 #endif /* !CONFIG_EASYCAP_OSS */
 453 /*---------------------------------------------------------------------------*/
 454 /*
 455  *  SOUND PROPERTIES
 456  */
 457 /*---------------------------------------------------------------------------*/
 458         int audio_interface;
 459         int audio_altsetting_on;
 460         int audio_altsetting_off;
 461         int audio_endpointnumber;
 462         int audio_isoc_maxframesize;
 463         int audio_isoc_buffer_size;
 464         int audio_isoc_framesperdesc;
 465
 466         int audio_isoc_streaming;
 467         int audio_idle;
 468         int audio_eof;
 469         int volume;
 470         int mute;
 471         s8 gain;
 472
 473         struct data_buffer audio_isoc_buffer[AUDIO_ISOC_BUFFER_MANY];
 474
 475         struct list_head urb_audio_head;
 476         struct list_head *purb_audio_head;
 477 /*---------------------------------------------------------------------------*/
 478 /*
 479  *  BUFFER INDICATORS
 480  */
 481 /*---------------------------------------------------------------------------*/
 482         int audio_fill; /* Audio buffer being filled by easycap_complete().  */
 483                         /*   Bumped only by easycap_complete().              */
 484         int audio_read; /* Audio buffer page being read by easycap_read().   */
 485                         /*   Set by easycap_read() to trail audio_fill by    */
 486                         /*   one fragment.                                   */
 487 /*---------------------------------------------------------------------------*/
 488 /*
 489  *  SOUND PROPERTIES
 490  */
 491 /*---------------------------------------------------------------------------*/
 492
 493         int audio_buffer_many;
 494
 495         int allocation_audio_urb;
 496         int allocation_audio_page;
 497         int allocation_audio_struct;
 498         int registered_audio;
 499
 500         long long int audio_sample;
 501         long long int audio_niveau;
 502         long long int audio_square;
 503
 504         struct data_buffer audio_buffer[];
 505 };
 506 /*---------------------------------------------------------------------------*/
 507 /*
 508  *  VIDEO FUNCTION PROTOTYPES
 509  */
 510 /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
 511 long easycap_unlocked_ioctl(struct file *, unsigned int, unsigned long);
 512 int              easycap_dqbuf(struct easycap *, int);
 513 int              submit_video_urbs(struct easycap *);
 514 int              kill_video_urbs(struct easycap *);
 515 int              field2frame(struct easycap *);
 516 int              redaub(struct easycap *, void *, void *,
 517                                                 int, int, u8, u8, bool);
 518 void             easycap_testcard(struct easycap *, int);
 519 int              fillin_formats(void);
 520 int              newinput(struct easycap *, int);
 521 int              adjust_standard(struct easycap *, v4l2_std_id);
 522 int              adjust_format(struct easycap *, u32, u32, u32,
 523                                                                 int, bool);
 524 int              adjust_brightness(struct easycap *, int);
 525 int              adjust_contrast(struct easycap *, int);
 526 int              adjust_saturation(struct easycap *, int);
 527 int              adjust_hue(struct easycap *, int);
 528 int              adjust_volume(struct easycap *, int);
 529 /*---------------------------------------------------------------------------*/
 530 /*
 531  *  AUDIO FUNCTION PROTOTYPES
 532  */
 533 /*---------------------------------------------------------------------------*/
 534 #ifndef CONFIG_EASYCAP_OSS
 535 int             easycap_alsa_probe(struct easycap *);
 536 void            easycap_alsa_complete(struct urb *);
 537 #else /* CONFIG_EASYCAP_OSS */
 538 void             easyoss_complete(struct urb *);
 539 #endif /* !CONFIG_EASYCAP_OSS */
 540
 541 int              easycap_sound_setup(struct easycap *);
 542 int              submit_audio_urbs(struct easycap *);
 543 int              kill_audio_urbs(struct easycap *);
 544 void             easyoss_testtone(struct easycap *, int);
 545 int              audio_setup(struct easycap *);
 546 /*---------------------------------------------------------------------------*/
 547 /*
 548  *  LOW-LEVEL FUNCTION PROTOTYPES
 549  */
 550 /*---------------------------------------------------------------------------*/
 551 int              audio_gainget(struct usb_device *);
 552 int              audio_gainset(struct usb_device *, s8);
 553
 554 int              set_interface(struct usb_device *, u16);
 555 int              wakeup_device(struct usb_device *);
 556 int              confirm_resolution(struct usb_device *);
 557 int              confirm_stream(struct usb_device *);
 558
 559 int              setup_stk(struct usb_device *, bool);
 560 int              setup_saa(struct usb_device *, bool);
 561 int              setup_vt(struct usb_device *);
 562 int              check_stk(struct usb_device *, bool);
 563 int              check_saa(struct usb_device *, bool);
 564 int              ready_saa(struct usb_device *);
 565 int              merit_saa(struct usb_device *);
 566 int              check_vt(struct usb_device *);
 567 int              select_input(struct usb_device *, int, int);
 568 int              set_resolution(struct usb_device *,
 569                                                 u16, u16, u16, u16);
 570
 571 int              read_saa(struct usb_device *, u16);
 572 int              read_stk(struct usb_device *, u32);
 573 int              write_saa(struct usb_device *, u16, u16);
 574 int              wait_i2c(struct usb_device *);
 575 int              write_000(struct usb_device *, u16, u16);
 576 int              start_100(struct usb_device *);
 577 int              stop_100(struct usb_device *);
 578 int              write_300(struct usb_device *);
 579 int              read_vt(struct usb_device *, u16);
 580 int              write_vt(struct usb_device *, u16, u16);
 581 int              regset(struct usb_device *, u16, u16);
 582 int              regget(struct usb_device *, u16, void *);
 583 int             isdongle(struct easycap *);
 584 /*---------------------------------------------------------------------------*/
 585 struct signed_div_result {
 586         long long int quotient;
 587         unsigned long long int remainder;
 588 } signed_div(long long int, long long int);
 589
 590
 591 /*---------------------------------------------------------------------------*/
 592 /*
 593  *  MACROS
 594  */
 595 /*---------------------------------------------------------------------------*/
 596 #define GET(X, Y, Z) do { \
 597         int __rc; \
 598         *(Z) = (u16)0; \
 599         __rc = regget(X, Y, Z); \
 600         if (0 > __rc) { \
 601                 JOT(8, ":-(%i\n", __LINE__);  return __rc; \
 602         } \
 603 } while (0)
 604
 605 #define SET(X, Y, Z) do { \
 606         int __rc; \
 607         __rc = regset(X, Y, Z); \
 608         if (0 > __rc) { \
 609                 JOT(8, ":-(%i\n", __LINE__);  return __rc; \
 610         } \
 611 } while (0)
 612 /*---------------------------------------------------------------------------*/
 613 /*
 614  *  MACROS SAM(...) AND JOM(...) ALLOW DIAGNOSTIC OUTPUT TO BE TAGGED WITH
 615  *  THE IDENTITY OF THE DONGLE TO WHICH IT APPLIES, BUT IF INVOKED WHEN THE
 616  *  POINTER peasycap IS INVALID AN Oops IS LIKELY, AND ITS CAUSE MAY NOT BE
 617  *  IMMEDIATELY OBVIOUS FROM A CASUAL READING OF THE SOURCE CODE.  BEWARE.
 618 */
 619 /*---------------------------------------------------------------------------*/
 620 const char *strerror(int err);
 621
 622 #define SAY(format, args...) do { \
 623         printk(KERN_DEBUG "easycap:: %s: " \
 624                         format, __func__, ##args); \
 625 } while (0)
 626 #define SAM(format, args...) do { \
 627         printk(KERN_DEBUG "easycap::%i%s: " \
 628                         format, peasycap->isdongle, __func__, ##args);\
 629 } while (0)
 630
 631 #ifdef CONFIG_EASYCAP_DEBUG
 632 extern int easycap_debug;
 633 #define JOT(n, format, args...) do { \
 634         if (n <= easycap_debug) { \
 635                 printk(KERN_DEBUG "easycap:: %s: " \
 636                         format, __func__, ##args);\
 637         } \
 638 } while (0)
 639 #define JOM(n, format, args...) do { \
 640         if (n <= easycap_debug) { \
 641                 printk(KERN_DEBUG "easycap::%i%s: " \
 642                         format, peasycap->isdongle, __func__, ##args);\
 643         } \
 644 } while (0)
 645
 646 #else
 647 #define JOT(n, format, args...) do {} while (0)
 648 #define JOM(n, format, args...) do {} while (0)
 649 #endif /* CONFIG_EASYCAP_DEBUG */
 650
 651 #define MICROSECONDS(X, Y) \
 652                         ((1000000*((long long int)(X.tv_sec - Y.tv_sec))) + \
 653                                         (long long int)(X.tv_usec - Y.tv_usec))
 654
 655 /*---------------------------------------------------------------------------*/
 656 /*
 657  *  (unsigned char *)P           pointer to next byte pair
 658  *       (long int *)X           pointer to accumulating count
 659  *       (long int *)Y           pointer to accumulating sum
 660  *  (long long int *)Z           pointer to accumulating sum of squares
 661  */
 662 /*---------------------------------------------------------------------------*/
 663 #define SUMMER(P, X, Y, Z) do {                                 \
 664         unsigned char *p;                                    \
 665         unsigned int u0, u1, u2;                             \
 666         long int s;                                          \
 667         p = (unsigned char *)(P);                            \
 668         u0 = (unsigned int) (*p);                            \
 669         u1 = (unsigned int) (*(p + 1));                      \
 670         u2 = (unsigned int) ((u1 << 8) | u0);                \
 671         if (0x8000 & u2)                                     \
 672                 s = -(long int)(0x7FFF & (~u2));             \
 673         else                                                 \
 674                 s =  (long int)(0x7FFF & u2);                \
 675         *((X)) += (long int) 1;                              \
 676         *((Y)) += (long int) s;                              \
 677         *((Z)) += ((long long int)(s) * (long long int)(s)); \
 678 } while (0)
 679 /*---------------------------------------------------------------------------*/
 680
 681 /*---------------------------------------------------------------------------*/
 682 /* globals
 683  */
 684 /*---------------------------------------------------------------------------*/
 685
 686 extern const struct easycap_standard easycap_standard[];
 687 extern struct easycap_format easycap_format[];
 688 extern struct v4l2_queryctrl easycap_control[];
 689 extern struct usb_driver easycap_usb_driver;
 690 extern struct easycap_dongle easycapdc60_dongle[];
 691 #ifdef CONFIG_EASYCAP_OSS
 692 extern struct usb_class_driver easyoss_class;
 693 #endif /* !CONFIG_EASYCAP_OSS */
 694
 695 #endif /* !__EASYCAP_H__  */