drivers/media/video/vivi.c

   1 /*
   2  * Virtual Video driver - This code emulates a real video device with v4l2 api
   3  *
   4  * Copyright (c) 2006 by:
   5  *      Mauro Carvalho Chehab <mchehab--a.t--infradead.org>
   6  *      Ted Walther <ted--a.t--enumera.com>
   7  *      John Sokol <sokol--a.t--videotechnology.com>
   8  *      http://v4l.videotechnology.com/
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the BSD Licence, GNU General Public License
  12  * as published by the Free Software Foundation; either version 2 of the
  13  * License, or (at your option) any later version
  14  */
  15 #include <linux/module.h>
  16 #include <linux/delay.h>
  17 #include <linux/errno.h>
  18 #include <linux/fs.h>
  19 #include <linux/kernel.h>
  20 #include <linux/slab.h>
  21 #include <linux/mm.h>
  22 #include <linux/ioport.h>
  23 #include <linux/init.h>
  24 #include <linux/sched.h>
  25 #include <linux/pci.h>
  26 #include <linux/random.h>
  27 #include <linux/version.h>
  28 #include <linux/videodev2.h>
  29 #include <linux/dma-mapping.h>
  30 #ifdef CONFIG_VIDEO_V4L1_COMPAT
  31 /* Include V4L1 specific functions. Should be removed soon */
  32 #include <linux/videodev.h>
  33 #endif
  34 #include <linux/interrupt.h>
  35 #include <media/video-buf.h>
  36 #include <media/v4l2-common.h>
  37 #include <linux/kthread.h>
  38 #include <linux/highmem.h>
  39 #include <linux/freezer.h>
  40
  41 /* Wake up at about 30 fps */
  42 #define WAKE_NUMERATOR 30
  43 #define WAKE_DENOMINATOR 1001
  44 #define BUFFER_TIMEOUT     msecs_to_jiffies(500)  /* 0.5 seconds */
  45
  46 /* These timers are for 1 fps - used only for testing */
  47 //#define WAKE_DENOMINATOR 30 /* hack for testing purposes */
  48 //#define BUFFER_TIMEOUT     msecs_to_jiffies(5000)  /* 5 seconds */
  49
  50 #include "font.h"
  51
  52 #define VIVI_MAJOR_VERSION 0
  53 #define VIVI_MINOR_VERSION 4
  54 #define VIVI_RELEASE 0
  55 #define VIVI_VERSION KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE)
  56
  57 /* Declare static vars that will be used as parameters */
  58 static unsigned int vid_limit = 16;     /* Video memory limit, in Mb */
  59 static struct video_device vivi;        /* Video device */
  60 static int video_nr = -1;               /* /dev/videoN, -1 for autodetect */
  61
  62 /* supported controls */
  63 static struct v4l2_queryctrl vivi_qctrl[] = {
  64         {
  65                 .id            = V4L2_CID_AUDIO_VOLUME,
  66                 .name          = "Volume",
  67                 .minimum       = 0,
  68                 .maximum       = 65535,
  69                 .step          = 65535/100,
  70                 .default_value = 65535,
  71                 .flags         = 0,
  72                 .type          = V4L2_CTRL_TYPE_INTEGER,
  73         },{
  74                 .id            = V4L2_CID_BRIGHTNESS,
  75                 .type          = V4L2_CTRL_TYPE_INTEGER,
  76                 .name          = "Brightness",
  77                 .minimum       = 0,
  78                 .maximum       = 255,
  79                 .step          = 1,
  80                 .default_value = 127,
  81                 .flags         = 0,
  82         }, {
  83                 .id            = V4L2_CID_CONTRAST,
  84                 .type          = V4L2_CTRL_TYPE_INTEGER,
  85                 .name          = "Contrast",
  86                 .minimum       = 0,
  87                 .maximum       = 255,
  88                 .step          = 0x1,
  89                 .default_value = 0x10,
  90                 .flags         = 0,
  91         }, {
  92                 .id            = V4L2_CID_SATURATION,
  93                 .type          = V4L2_CTRL_TYPE_INTEGER,
  94                 .name          = "Saturation",
  95                 .minimum       = 0,
  96                 .maximum       = 255,
  97                 .step          = 0x1,
  98                 .default_value = 127,
  99                 .flags         = 0,
 100         }, {
 101                 .id            = V4L2_CID_HUE,
 102                 .type          = V4L2_CTRL_TYPE_INTEGER,
 103                 .name          = "Hue",
 104                 .minimum       = -128,
 105                 .maximum       = 127,
 106                 .step          = 0x1,
 107                 .default_value = 0,
 108                 .flags         = 0,
 109         }
 110 };
 111
 112 static int qctl_regs[ARRAY_SIZE(vivi_qctrl)];
 113
 114 #define dprintk(level,fmt, arg...)                                      \
 115         do {                                                            \
 116                 if (vivi.debug >= (level))                              \
 117                         printk(KERN_DEBUG "vivi: " fmt , ## arg);       \
 118         } while (0)
 119
 120 /* ------------------------------------------------------------------
 121         Basic structures
 122    ------------------------------------------------------------------*/
 123
 124 struct vivi_fmt {
 125         char  *name;
 126         u32   fourcc;          /* v4l2 format id */
 127         int   depth;
 128 };
 129
 130 static struct vivi_fmt format = {
 131         .name     = "4:2:2, packed, YUYV",
 132         .fourcc   = V4L2_PIX_FMT_YUYV,
 133         .depth    = 16,
 134 };
 135
 136 struct sg_to_addr {
 137         int pos;
 138         struct scatterlist *sg;
 139 };
 140
 141 /* buffer for one video frame */
 142 struct vivi_buffer {
 143         /* common v4l buffer stuff -- must be first */
 144         struct videobuf_buffer vb;
 145
 146         struct vivi_fmt        *fmt;
 147
 148         struct sg_to_addr      *to_addr;
 149 };
 150
 151 struct vivi_dmaqueue {
 152         struct list_head       active;
 153         struct list_head       queued;
 154         struct timer_list      timeout;
 155
 156         /* thread for generating video stream*/
 157         struct task_struct         *kthread;
 158         wait_queue_head_t          wq;
 159         /* Counters to control fps rate */
 160         int                        frame;
 161         int                        ini_jiffies;
 162 };
 163
 164 static LIST_HEAD(vivi_devlist);
 165
 166 struct vivi_dev {
 167         struct list_head           vivi_devlist;
 168
 169         struct semaphore           lock;
 170
 171         int                        users;
 172
 173         /* various device info */
 174         unsigned int               resources;
 175         struct video_device        vfd;
 176
 177         struct vivi_dmaqueue       vidq;
 178
 179         /* Several counters */
 180         int                        h,m,s,us,jiffies;
 181         char                       timestr[13];
 182 };
 183
 184 struct vivi_fh {
 185         struct vivi_dev            *dev;
 186
 187         /* video capture */
 188         struct vivi_fmt            *fmt;
 189         unsigned int               width,height;
 190         struct videobuf_queue      vb_vidq;
 191
 192         enum v4l2_buf_type         type;
 193 };
 194
 195 /* ------------------------------------------------------------------
 196         DMA and thread functions
 197    ------------------------------------------------------------------*/
 198
 199 /* Bars and Colors should match positions */
 200
 201 enum colors {
 202         WHITE,
 203         AMBAR,
 204         CYAN,
 205         GREEN,
 206         MAGENTA,
 207         RED,
 208         BLUE
 209 };
 210
 211 static u8 bars[8][3] = {
 212         /* R   G   B */
 213         {204,204,204},  /* white */
 214         {208,208,  0},  /* ambar */
 215         {  0,206,206},  /* cyan */
 216         {  0,239,  0},  /* green */
 217         {239,  0,239},  /* magenta */
 218         {205,  0,  0},  /* red */
 219         {  0,  0,255},  /* blue */
 220         {  0,  0,  0}
 221 };
 222
 223 #define TO_Y(r,g,b) (((16829*r +33039*g +6416*b  + 32768)>>16)+16)
 224 /* RGB to  V(Cr) Color transform */
 225 #define TO_V(r,g,b) (((28784*r -24103*g -4681*b  + 32768)>>16)+128)
 226 /* RGB to  U(Cb) Color transform */
 227 #define TO_U(r,g,b) (((-9714*r -19070*g +28784*b + 32768)>>16)+128)
 228
 229 #define TSTAMP_MIN_Y 24
 230 #define TSTAMP_MAX_Y TSTAMP_MIN_Y+15
 231 #define TSTAMP_MIN_X 64
 232
 233 static void prep_to_addr(struct sg_to_addr to_addr[],
 234                          struct videobuf_buffer *vb)
 235 {
 236         int i, pos=0;
 237
 238         for (i=0;i<vb->dma.nr_pages;i++) {
 239                 to_addr[i].sg=&vb->dma.sglist[i];
 240                 to_addr[i].pos=pos;
 241                 pos += vb->dma.sglist[i].length;
 242         }
 243 }
 244
 245 static int get_addr_pos(int pos, int pages, struct sg_to_addr to_addr[])
 246 {
 247         int p1=0,p2=pages-1,p3=pages/2;
 248
 249         /* Sanity test */
 250         BUG_ON (pos>=to_addr[p2].pos+to_addr[p2].sg->length);
 251
 252         while (p1+1<p2) {
 253                 if (pos < to_addr[p3].pos) {
 254                         p2=p3;
 255                 } else {
 256                         p1=p3;
 257                 }
 258                 p3=(p1+p2)/2;
 259         }
 260         if (pos >= to_addr[p2].pos)
 261                 p1=p2;
 262
 263         return (p1);
 264 }
 265
 266 static void gen_line(struct sg_to_addr to_addr[],int inipos,int pages,int wmax,
 267                      int hmax, int line, char *timestr)
 268 {
 269         int  w,i,j,pos=inipos,pgpos,oldpg,y;
 270         char *p,*s,*basep;
 271         struct page *pg;
 272         u8   chr,r,g,b,color;
 273         unsigned long flags;
 274         spinlock_t spinlock;
 275
 276         spin_lock_init(&spinlock);
 277
 278         /* Get first addr pointed to pixel position */
 279         oldpg=get_addr_pos(pos,pages,to_addr);
 280         pg=pfn_to_page(sg_dma_address(to_addr[oldpg].sg) >> PAGE_SHIFT);
 281         spin_lock_irqsave(&spinlock,flags);
 282         basep = kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[oldpg].sg->offset;
 283
 284         /* We will just duplicate the second pixel at the packet */
 285         wmax/=2;
 286
 287         /* Generate a standard color bar pattern */
 288         for (w=0;w<wmax;w++) {
 289                 r=bars[w*7/wmax][0];
 290                 g=bars[w*7/wmax][1];
 291                 b=bars[w*7/wmax][2];
 292
 293                 for (color=0;color<4;color++) {
 294                         pgpos=get_addr_pos(pos,pages,to_addr);
 295                         if (pgpos!=oldpg) {
 296                                 pg=pfn_to_page(sg_dma_address(to_addr[pgpos].sg) >> PAGE_SHIFT);
 297                                 kunmap_atomic(basep, KM_BOUNCE_READ);
 298                                 basep= kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[pgpos].sg->offset;
 299                                 oldpg=pgpos;
 300                         }
 301                         p=basep+pos-to_addr[pgpos].pos;
 302
 303                         switch (color) {
 304                                 case 0:
 305                                 case 2:
 306                                         *p=TO_Y(r,g,b);         /* Luminance */
 307                                         break;
 308                                 case 1:
 309                                         *p=TO_U(r,g,b);         /* Cb */
 310                                         break;
 311                                 case 3:
 312                                         *p=TO_V(r,g,b);         /* Cr */
 313                                         break;
 314                         }
 315                         pos++;
 316                 }
 317         }
 318
 319         /* Checks if it is possible to show timestamp */
 320         if (TSTAMP_MAX_Y>=hmax)
 321                 goto end;
 322         if (TSTAMP_MIN_X+strlen(timestr)>=wmax)
 323                 goto end;
 324
 325         /* Print stream time */
 326         if (line>=TSTAMP_MIN_Y && line<=TSTAMP_MAX_Y) {
 327                 j=TSTAMP_MIN_X;
 328                 for (s=timestr;*s;s++) {
 329                         chr=rom8x16_bits[(*s-0x30)*16+line-TSTAMP_MIN_Y];
 330                         for (i=0;i<7;i++) {
 331                                 if (chr&1<<(7-i)) { /* Font color*/
 332                                         r=bars[BLUE][0];
 333                                         g=bars[BLUE][1];
 334                                         b=bars[BLUE][2];
 335                                         r=g=b=0;
 336                                         g=198;
 337                                 } else { /* Background color */
 338                                         r=bars[WHITE][0];
 339                                         g=bars[WHITE][1];
 340                                         b=bars[WHITE][2];
 341                                         r=g=b=0;
 342                                 }
 343
 344                                 pos=inipos+j*2;
 345                                 for (color=0;color<4;color++) {
 346                                         pgpos=get_addr_pos(pos,pages,to_addr);
 347                                         if (pgpos!=oldpg) {
 348                                                 pg=pfn_to_page(sg_dma_address(
 349                                                                 to_addr[pgpos].sg)
 350                                                                 >> PAGE_SHIFT);
 351                                                 kunmap_atomic(basep,
 352                                                                 KM_BOUNCE_READ);
 353                                                 basep= kmap_atomic(pg,
 354                                                         KM_BOUNCE_READ)+
 355                                                         to_addr[pgpos].sg->offset;
 356                                                 oldpg=pgpos;
 357                                         }
 358                                         p=basep+pos-to_addr[pgpos].pos;
 359
 360                                         y=TO_Y(r,g,b);
 361
 362                                         switch (color) {
 363                                                 case 0:
 364                                                 case 2:
 365                                                         *p=TO_Y(r,g,b);         /* Luminance */
 366                                                         break;
 367                                                 case 1:
 368                                                         *p=TO_U(r,g,b);         /* Cb */
 369                                                         break;
 370                                                 case 3:
 371                                                         *p=TO_V(r,g,b);         /* Cr */
 372                                                         break;
 373                                         }
 374                                         pos++;
 375                                 }
 376                                 j++;
 377                         }
 378                 }
 379         }
 380
 381
 382 end:
 383         kunmap_atomic(basep, KM_BOUNCE_READ);
 384         spin_unlock_irqrestore(&spinlock,flags);
 385
 386 }
 387 static void vivi_fillbuff(struct vivi_dev *dev,struct vivi_buffer *buf)
 388 {
 389         int h,pos=0;
 390         int hmax  = buf->vb.height;
 391         int wmax  = buf->vb.width;
 392         struct videobuf_buffer *vb=&buf->vb;
 393         struct sg_to_addr *to_addr=buf->to_addr;
 394         struct timeval ts;
 395
 396         /* Test if DMA mapping is ready */
 397         if (!sg_dma_address(&vb->dma.sglist[0]))
 398                 return;
 399
 400         prep_to_addr(to_addr,vb);
 401
 402         /* Check if there is enough memory */
 403         BUG_ON(buf->vb.dma.nr_pages << PAGE_SHIFT < (buf->vb.width*buf->vb.height)*2);
 404
 405         for (h=0;h<hmax;h++) {
 406                 gen_line(to_addr,pos,vb->dma.nr_pages,wmax,hmax,h,dev->timestr);
 407                 pos += wmax*2;
 408         }
 409
 410         /* Updates stream time */
 411
 412         dev->us+=jiffies_to_usecs(jiffies-dev->jiffies);
 413         dev->jiffies=jiffies;
 414         if (dev->us>=1000000) {
 415                 dev->us-=1000000;
 416                 dev->s++;
 417                 if (dev->s>=60) {
 418                         dev->s-=60;
 419                         dev->m++;
 420                         if (dev->m>60) {
 421                                 dev->m-=60;
 422                                 dev->h++;
 423                                 if (dev->h>24)
 424                                         dev->h-=24;
 425                         }
 426                 }
 427         }
 428         sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
 429                         dev->h,dev->m,dev->s,(dev->us+500)/1000);
 430
 431         dprintk(2,"vivifill at %s: Buffer 0x%08lx size= %d\n",dev->timestr,
 432                         (unsigned long)buf->vb.dma.vmalloc,pos);
 433
 434         /* Advice that buffer was filled */
 435         buf->vb.state = STATE_DONE;
 436         buf->vb.field_count++;
 437         do_gettimeofday(&ts);
 438         buf->vb.ts = ts;
 439
 440         list_del(&buf->vb.queue);
 441         wake_up(&buf->vb.done);
 442 }
 443
 444 static int restart_video_queue(struct vivi_dmaqueue *dma_q);
 445
 446 static void vivi_thread_tick(struct vivi_dmaqueue  *dma_q)
 447 {
 448         struct vivi_buffer    *buf;
 449         struct vivi_dev *dev= container_of(dma_q,struct vivi_dev,vidq);
 450
 451         int bc;
 452
 453         /* Announces videobuf that all went ok */
 454         for (bc = 0;; bc++) {
 455                 if (list_empty(&dma_q->active)) {
 456                         dprintk(1,"No active queue to serve\n");
 457                         break;
 458                 }
 459
 460                 buf = list_entry(dma_q->active.next,
 461                                  struct vivi_buffer, vb.queue);
 462
 463                 /* Nobody is waiting something to be done, just return */
 464                 if (!waitqueue_active(&buf->vb.done)) {
 465                         mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 466                         return;
 467                 }
 468
 469                 do_gettimeofday(&buf->vb.ts);
 470                 dprintk(2,"[%p/%d] wakeup\n",buf,buf->vb.i);
 471
 472                 /* Fill buffer */
 473                 vivi_fillbuff(dev,buf);
 474         }
 475         if (list_empty(&dma_q->active)) {
 476                 del_timer(&dma_q->timeout);
 477         } else {
 478                 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 479         }
 480         if (bc != 1)
 481                 dprintk(1,"%s: %d buffers handled (should be 1)\n",__FUNCTION__,bc);
 482 }
 483
 484 static void vivi_sleep(struct vivi_dmaqueue  *dma_q)
 485 {
 486         int timeout;
 487         DECLARE_WAITQUEUE(wait, current);
 488
 489         dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
 490
 491         add_wait_queue(&dma_q->wq, &wait);
 492         if (!kthread_should_stop()) {
 493                 dma_q->frame++;
 494
 495                 /* Calculate time to wake up */
 496                 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
 497
 498                 if (timeout <= 0) {
 499                         int old=dma_q->frame;
 500                         dma_q->frame=(jiffies_to_msecs(jiffies-dma_q->ini_jiffies)*WAKE_DENOMINATOR)/(WAKE_NUMERATOR*1000)+1;
 501
 502                         timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
 503
 504                         dprintk(1,"underrun, losed %d frames. "
 505                                   "Now, frame is %d. Waking on %d jiffies\n",
 506                                         dma_q->frame-old,dma_q->frame,timeout);
 507                 } else
 508                         dprintk(1,"will sleep for %i jiffies\n",timeout);
 509
 510                 vivi_thread_tick(dma_q);
 511
 512                 schedule_timeout_interruptible (timeout);
 513         }
 514
 515         remove_wait_queue(&dma_q->wq, &wait);
 516         try_to_freeze();
 517 }
 518
 519 static int vivi_thread(void *data)
 520 {
 521         struct vivi_dmaqueue  *dma_q=data;
 522
 523         dprintk(1,"thread started\n");
 524
 525         for (;;) {
 526                 vivi_sleep(dma_q);
 527
 528                 if (kthread_should_stop())
 529                         break;
 530         }
 531         dprintk(1, "thread: exit\n");
 532         return 0;
 533 }
 534
 535 static int vivi_start_thread(struct vivi_dmaqueue  *dma_q)
 536 {
 537         dma_q->frame=0;
 538         dma_q->ini_jiffies=jiffies;
 539
 540         dprintk(1,"%s\n",__FUNCTION__);
 541         init_waitqueue_head(&dma_q->wq);
 542
 543         dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi");
 544
 545         if (IS_ERR(dma_q->kthread)) {
 546                 printk(KERN_ERR "vivi: kernel_thread() failed\n");
 547                 return PTR_ERR(dma_q->kthread);
 548         }
 549         dprintk(1,"returning from %s\n",__FUNCTION__);
 550         return 0;
 551 }
 552
 553 static void vivi_stop_thread(struct vivi_dmaqueue  *dma_q)
 554 {
 555         dprintk(1,"%s\n",__FUNCTION__);
 556         /* shutdown control thread */
 557         if (dma_q->kthread) {
 558                 kthread_stop(dma_q->kthread);
 559                 dma_q->kthread=NULL;
 560         }
 561 }
 562
 563 static int restart_video_queue(struct vivi_dmaqueue *dma_q)
 564 {
 565         struct vivi_buffer *buf, *prev;
 566         struct list_head *item;
 567
 568         dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
 569
 570         if (!list_empty(&dma_q->active)) {
 571                 buf = list_entry(dma_q->active.next, struct vivi_buffer, vb.queue);
 572                 dprintk(2,"restart_queue [%p/%d]: restart dma\n",
 573                         buf, buf->vb.i);
 574
 575                 dprintk(1,"Restarting video dma\n");
 576                 vivi_stop_thread(dma_q);
 577 //              vivi_start_thread(dma_q);
 578
 579                 /* cancel all outstanding capture / vbi requests */
 580                 list_for_each(item,&dma_q->active) {
 581                         buf = list_entry(item, struct vivi_buffer, vb.queue);
 582
 583                         list_del(&buf->vb.queue);
 584                         buf->vb.state = STATE_ERROR;
 585                         wake_up(&buf->vb.done);
 586                 }
 587                 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 588
 589                 return 0;
 590         }
 591
 592         prev = NULL;
 593         for (;;) {
 594                 if (list_empty(&dma_q->queued))
 595                         return 0;
 596                 buf = list_entry(dma_q->queued.next, struct vivi_buffer, vb.queue);
 597                 if (NULL == prev) {
 598                         list_del(&buf->vb.queue);
 599                         list_add_tail(&buf->vb.queue,&dma_q->active);
 600
 601                         dprintk(1,"Restarting video dma\n");
 602                         vivi_stop_thread(dma_q);
 603                         vivi_start_thread(dma_q);
 604
 605                         buf->vb.state = STATE_ACTIVE;
 606                         mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 607                         dprintk(2,"[%p/%d] restart_queue - first active\n",
 608                                 buf,buf->vb.i);
 609
 610                 } else if (prev->vb.width  == buf->vb.width  &&
 611                            prev->vb.height == buf->vb.height &&
 612                            prev->fmt       == buf->fmt) {
 613                         list_del(&buf->vb.queue);
 614                         list_add_tail(&buf->vb.queue,&dma_q->active);
 615                         buf->vb.state = STATE_ACTIVE;
 616                         dprintk(2,"[%p/%d] restart_queue - move to active\n",
 617                                 buf,buf->vb.i);
 618                 } else {
 619                         return 0;
 620                 }
 621                 prev = buf;
 622         }
 623 }
 624
 625 static void vivi_vid_timeout(unsigned long data)
 626 {
 627         struct vivi_dev      *dev  = (struct vivi_dev*)data;
 628         struct vivi_dmaqueue *vidq = &dev->vidq;
 629         struct vivi_buffer   *buf;
 630
 631         while (!list_empty(&vidq->active)) {
 632                 buf = list_entry(vidq->active.next, struct vivi_buffer, vb.queue);
 633                 list_del(&buf->vb.queue);
 634                 buf->vb.state = STATE_ERROR;
 635                 wake_up(&buf->vb.done);
 636                 printk("vivi/0: [%p/%d] timeout\n", buf, buf->vb.i);
 637         }
 638
 639         restart_video_queue(vidq);
 640 }
 641
 642 /* ------------------------------------------------------------------
 643         Videobuf operations
 644    ------------------------------------------------------------------*/
 645 static int
 646 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 647 {
 648         struct vivi_fh *fh = vq->priv_data;
 649
 650         *size = fh->width*fh->height*2;
 651
 652         if (0 == *count)
 653                 *count = 32;
 654         while (*size * *count > vid_limit * 1024 * 1024)
 655                 (*count)--;
 656         return 0;
 657 }
 658
 659 static void free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
 660 {
 661         dprintk(1,"%s\n",__FUNCTION__);
 662
 663         if (in_interrupt())
 664                 BUG();
 665
 666         /*FIXME: Maybe a spinlock is required here */
 667         kfree(buf->to_addr);
 668         buf->to_addr=NULL;
 669
 670         videobuf_waiton(&buf->vb,0,0);
 671         videobuf_dma_unmap(vq, &buf->vb.dma);
 672         videobuf_dma_free(&buf->vb.dma);
 673         buf->vb.state = STATE_NEEDS_INIT;
 674 }
 675
 676 #define norm_maxw() 1024
 677 #define norm_maxh() 768
 678 static int
 679 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 680                                                 enum v4l2_field field)
 681 {
 682         struct vivi_fh     *fh  = vq->priv_data;
 683         struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
 684         int rc, init_buffer = 0;
 685
 686 //      dprintk(1,"%s, field=%d\n",__FUNCTION__,field);
 687
 688         BUG_ON(NULL == fh->fmt);
 689         if (fh->width  < 48 || fh->width  > norm_maxw() ||
 690             fh->height < 32 || fh->height > norm_maxh())
 691                 return -EINVAL;
 692         buf->vb.size = fh->width*fh->height*2;
 693         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
 694                 return -EINVAL;
 695
 696         if (buf->fmt       != fh->fmt    ||
 697             buf->vb.width  != fh->width  ||
 698             buf->vb.height != fh->height ||
 699         buf->vb.field  != field) {
 700                 buf->fmt       = fh->fmt;
 701                 buf->vb.width  = fh->width;
 702                 buf->vb.height = fh->height;
 703                 buf->vb.field  = field;
 704                 init_buffer = 1;
 705         }
 706
 707         if (STATE_NEEDS_INIT == buf->vb.state) {
 708                 if (0 != (rc = videobuf_iolock(vq,&buf->vb,NULL)))
 709                         goto fail;
 710         }
 711
 712         buf->vb.state = STATE_PREPARED;
 713
 714         if (NULL == (buf->to_addr = kmalloc(sizeof(*buf->to_addr) * vb->dma.nr_pages,GFP_KERNEL))) {
 715                 rc=-ENOMEM;
 716                 goto fail;
 717         }
 718
 719         return 0;
 720
 721 fail:
 722         free_buffer(vq,buf);
 723         return rc;
 724 }
 725
 726 static void
 727 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 728 {
 729         struct vivi_buffer    *buf     = container_of(vb,struct vivi_buffer,vb);
 730         struct vivi_fh        *fh      = vq->priv_data;
 731         struct vivi_dev       *dev     = fh->dev;
 732         struct vivi_dmaqueue  *vidq    = &dev->vidq;
 733         struct vivi_buffer    *prev;
 734
 735         if (!list_empty(&vidq->queued)) {
 736                 dprintk(1,"adding vb queue=0x%08lx\n",(unsigned long)&buf->vb.queue);
 737                 list_add_tail(&buf->vb.queue,&vidq->queued);
 738                 buf->vb.state = STATE_QUEUED;
 739                 dprintk(2,"[%p/%d] buffer_queue - append to queued\n",
 740                         buf, buf->vb.i);
 741         } else if (list_empty(&vidq->active)) {
 742                 list_add_tail(&buf->vb.queue,&vidq->active);
 743
 744                 buf->vb.state = STATE_ACTIVE;
 745                 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
 746                 dprintk(2,"[%p/%d] buffer_queue - first active\n",
 747                         buf, buf->vb.i);
 748
 749                 vivi_start_thread(vidq);
 750         } else {
 751                 prev = list_entry(vidq->active.prev, struct vivi_buffer, vb.queue);
 752                 if (prev->vb.width  == buf->vb.width  &&
 753                     prev->vb.height == buf->vb.height &&
 754                     prev->fmt       == buf->fmt) {
 755                         list_add_tail(&buf->vb.queue,&vidq->active);
 756                         buf->vb.state = STATE_ACTIVE;
 757                         dprintk(2,"[%p/%d] buffer_queue - append to active\n",
 758                                 buf, buf->vb.i);
 759
 760                 } else {
 761                         list_add_tail(&buf->vb.queue,&vidq->queued);
 762                         buf->vb.state = STATE_QUEUED;
 763                         dprintk(2,"[%p/%d] buffer_queue - first queued\n",
 764                                 buf, buf->vb.i);
 765                 }
 766         }
 767 }
 768
 769 static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 770 {
 771         struct vivi_buffer   *buf  = container_of(vb,struct vivi_buffer,vb);
 772         struct vivi_fh       *fh   = vq->priv_data;
 773         struct vivi_dev      *dev  = (struct vivi_dev*)fh->dev;
 774         struct vivi_dmaqueue *vidq = &dev->vidq;
 775
 776         dprintk(1,"%s\n",__FUNCTION__);
 777
 778         vivi_stop_thread(vidq);
 779
 780         free_buffer(vq,buf);
 781 }
 782
 783 static int vivi_map_sg(void *dev, struct scatterlist *sg, int nents,
 784                        int direction)
 785 {
 786         int i;
 787
 788         dprintk(1,"%s, number of pages=%d\n",__FUNCTION__,nents);
 789         BUG_ON(direction == DMA_NONE);
 790
 791         for (i = 0; i < nents; i++ ) {
 792                 BUG_ON(!sg[i].page);
 793
 794                 sg_dma_address(&sg[i]) = page_to_phys(sg[i].page) + sg[i].offset;
 795         }
 796
 797         return nents;
 798 }
 799
 800 static int vivi_unmap_sg(void *dev,struct scatterlist *sglist,int nr_pages,
 801                          int direction)
 802 {
 803         dprintk(1,"%s\n",__FUNCTION__);
 804         return 0;
 805 }
 806
 807 static int vivi_dma_sync_sg(void *dev,struct scatterlist *sglist, int nr_pages,
 808                             int direction)
 809 {
 810 //      dprintk(1,"%s\n",__FUNCTION__);
 811
 812 //      flush_write_buffers();
 813         return 0;
 814 }
 815
 816 static struct videobuf_queue_ops vivi_video_qops = {
 817         .buf_setup      = buffer_setup,
 818         .buf_prepare    = buffer_prepare,
 819         .buf_queue      = buffer_queue,
 820         .buf_release    = buffer_release,
 821
 822         /* Non-pci handling routines */
 823         .vb_map_sg      = vivi_map_sg,
 824         .vb_dma_sync_sg = vivi_dma_sync_sg,
 825         .vb_unmap_sg    = vivi_unmap_sg,
 826 };
 827
 828 /* ------------------------------------------------------------------
 829         IOCTL handling
 830    ------------------------------------------------------------------*/
 831
 832
 833 static int res_get(struct vivi_dev *dev, struct vivi_fh *fh)
 834 {
 835         /* is it free? */
 836         down(&dev->lock);
 837         if (dev->resources) {
 838                 /* no, someone else uses it */
 839                 up(&dev->lock);
 840                 return 0;
 841         }
 842         /* it's free, grab it */
 843         dev->resources =1;
 844         dprintk(1,"res: get\n");
 845         up(&dev->lock);
 846         return 1;
 847 }
 848
 849 static int res_locked(struct vivi_dev *dev)
 850 {
 851         return (dev->resources);
 852 }
 853
 854 static void res_free(struct vivi_dev *dev, struct vivi_fh *fh)
 855 {
 856         down(&dev->lock);
 857         dev->resources = 0;
 858         dprintk(1,"res: put\n");
 859         up(&dev->lock);
 860 }
 861
 862 /* ------------------------------------------------------------------
 863         IOCTL vidioc handling
 864    ------------------------------------------------------------------*/
 865 static int vidioc_querycap (struct file *file, void  *priv,
 866                                         struct v4l2_capability *cap)
 867 {
 868         strcpy(cap->driver, "vivi");
 869         strcpy(cap->card, "vivi");
 870         cap->version = VIVI_VERSION;
 871         cap->capabilities =     V4L2_CAP_VIDEO_CAPTURE |
 872                                 V4L2_CAP_STREAMING     |
 873                                 V4L2_CAP_READWRITE;
 874         return 0;
 875 }
 876
 877 static int vidioc_enum_fmt_cap (struct file *file, void  *priv,
 878                                         struct v4l2_fmtdesc *f)
 879 {
 880         if (f->index > 0)
 881                 return -EINVAL;
 882
 883         strlcpy(f->description,format.name,sizeof(f->description));
 884         f->pixelformat = format.fourcc;
 885         return 0;
 886 }
 887
 888 static int vidioc_g_fmt_cap (struct file *file, void *priv,
 889                                         struct v4l2_format *f)
 890 {
 891         struct vivi_fh  *fh=priv;
 892
 893         f->fmt.pix.width        = fh->width;
 894         f->fmt.pix.height       = fh->height;
 895         f->fmt.pix.field        = fh->vb_vidq.field;
 896         f->fmt.pix.pixelformat  = fh->fmt->fourcc;
 897         f->fmt.pix.bytesperline =
 898                 (f->fmt.pix.width * fh->fmt->depth) >> 3;
 899         f->fmt.pix.sizeimage =
 900                 f->fmt.pix.height * f->fmt.pix.bytesperline;
 901
 902         return (0);
 903 }
 904
 905 static int vidioc_try_fmt_cap (struct file *file, void *priv,
 906                         struct v4l2_format *f)
 907 {
 908         struct vivi_fmt *fmt;
 909         enum v4l2_field field;
 910         unsigned int maxw, maxh;
 911
 912         if (format.fourcc != f->fmt.pix.pixelformat) {
 913                 dprintk(1,"Fourcc format (0x%08x) invalid. Driver accepts "
 914                         "only 0x%08x\n",f->fmt.pix.pixelformat,format.fourcc);
 915                 return -EINVAL;
 916         }
 917         fmt=&format;
 918
 919         field = f->fmt.pix.field;
 920
 921         if (field == V4L2_FIELD_ANY) {
 922 //              field=V4L2_FIELD_INTERLACED;
 923                 field=V4L2_FIELD_SEQ_TB;
 924         } else if (V4L2_FIELD_INTERLACED != field) {
 925                 dprintk(1,"Field type invalid.\n");
 926                 return -EINVAL;
 927         }
 928
 929         maxw  = norm_maxw();
 930         maxh  = norm_maxh();
 931
 932         f->fmt.pix.field = field;
 933         if (f->fmt.pix.height < 32)
 934                 f->fmt.pix.height = 32;
 935         if (f->fmt.pix.height > maxh)
 936                 f->fmt.pix.height = maxh;
 937         if (f->fmt.pix.width < 48)
 938                 f->fmt.pix.width = 48;
 939         if (f->fmt.pix.width > maxw)
 940                 f->fmt.pix.width = maxw;
 941         f->fmt.pix.width &= ~0x03;
 942         f->fmt.pix.bytesperline =
 943                 (f->fmt.pix.width * fmt->depth) >> 3;
 944         f->fmt.pix.sizeimage =
 945                 f->fmt.pix.height * f->fmt.pix.bytesperline;
 946
 947         return 0;
 948 }
 949
 950 /*FIXME: This seems to be generic enough to be at videodev2 */
 951 static int vidioc_s_fmt_cap (struct file *file, void *priv,
 952                                         struct v4l2_format *f)
 953 {
 954         struct vivi_fh  *fh=priv;
 955         int ret = vidioc_try_fmt_cap(file,fh,f);
 956         if (ret < 0)
 957                 return (ret);
 958
 959         fh->fmt           = &format;
 960         fh->width         = f->fmt.pix.width;
 961         fh->height        = f->fmt.pix.height;
 962         fh->vb_vidq.field = f->fmt.pix.field;
 963         fh->type          = f->type;
 964
 965         return (0);
 966 }
 967
 968 static int vidioc_reqbufs (struct file *file, void *priv, struct v4l2_requestbuffers *p)
 969 {
 970         struct vivi_fh  *fh=priv;
 971
 972         return (videobuf_reqbufs(&fh->vb_vidq, p));
 973 }
 974
 975 static int vidioc_querybuf (struct file *file, void *priv, struct v4l2_buffer *p)
 976 {
 977         struct vivi_fh  *fh=priv;
 978
 979         return (videobuf_querybuf(&fh->vb_vidq, p));
 980 }
 981
 982 static int vidioc_qbuf (struct file *file, void *priv, struct v4l2_buffer *p)
 983 {
 984         struct vivi_fh  *fh=priv;
 985
 986         return (videobuf_qbuf(&fh->vb_vidq, p));
 987 }
 988
 989 static int vidioc_dqbuf (struct file *file, void *priv, struct v4l2_buffer *p)
 990 {
 991         struct vivi_fh  *fh=priv;
 992
 993         return (videobuf_dqbuf(&fh->vb_vidq, p,
 994                                 file->f_flags & O_NONBLOCK));
 995 }
 996
 997 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 998 static int vidiocgmbuf (struct file *file, void *priv, struct video_mbuf *mbuf)
 999 {
1000         struct vivi_fh  *fh=priv;
1001         struct videobuf_queue *q=&fh->vb_vidq;
1002         struct v4l2_requestbuffers req;
1003         unsigned int i;
1004         int ret;
1005
1006         req.type   = q->type;
1007         req.count  = 8;
1008         req.memory = V4L2_MEMORY_MMAP;
1009         ret = videobuf_reqbufs(q,&req);
1010         if (ret < 0)
1011                 return (ret);
1012
1013         mbuf->frames = req.count;
1014         mbuf->size   = 0;
1015         for (i = 0; i < mbuf->frames; i++) {
1016                 mbuf->offsets[i]  = q->bufs[i]->boff;
1017                 mbuf->size       += q->bufs[i]->bsize;
1018         }
1019         return (0);
1020 }
1021 #endif
1022
1023 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
1024 {
1025         struct vivi_fh  *fh=priv;
1026         struct vivi_dev *dev    = fh->dev;
1027
1028         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1029                 return -EINVAL;
1030         if (i != fh->type)
1031                 return -EINVAL;
1032
1033         if (!res_get(dev,fh))
1034                 return -EBUSY;
1035         return (videobuf_streamon(&fh->vb_vidq));
1036 }
1037
1038 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
1039 {
1040         struct vivi_fh  *fh=priv;
1041         struct vivi_dev *dev    = fh->dev;
1042
1043         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1044                 return -EINVAL;
1045         if (i != fh->type)
1046                 return -EINVAL;
1047
1048         videobuf_streamoff(&fh->vb_vidq);
1049         res_free(dev,fh);
1050
1051         return (0);
1052 }
1053
1054 static int vidioc_s_std (struct file *file, void *priv, v4l2_std_id *i)
1055 {
1056         return 0;
1057 }
1058
1059 /* only one input in this sample driver */
1060 static int vidioc_enum_input (struct file *file, void *priv,
1061                                 struct v4l2_input *inp)
1062 {
1063         if (inp->index != 0)
1064                 return -EINVAL;
1065
1066         inp->type = V4L2_INPUT_TYPE_CAMERA;
1067         inp->std = V4L2_STD_NTSC_M;
1068         strcpy(inp->name,"Camera");
1069
1070         return (0);
1071 }
1072
1073 static int vidioc_g_input (struct file *file, void *priv, unsigned int *i)
1074 {
1075         *i = 0;
1076
1077         return (0);
1078 }
1079 static int vidioc_s_input (struct file *file, void *priv, unsigned int i)
1080 {
1081         if (i > 0)
1082                 return -EINVAL;
1083
1084         return (0);
1085 }
1086
1087         /* --- controls ---------------------------------------------- */
1088 static int vidioc_queryctrl (struct file *file, void *priv,
1089                                 struct v4l2_queryctrl *qc)
1090 {
1091         int i;
1092
1093         for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1094                 if (qc->id && qc->id == vivi_qctrl[i].id) {
1095                         memcpy(qc, &(vivi_qctrl[i]),
1096                                 sizeof(*qc));
1097                         return (0);
1098                 }
1099
1100         return -EINVAL;
1101 }
1102
1103 static int vidioc_g_ctrl (struct file *file, void *priv,
1104                                 struct v4l2_control *ctrl)
1105 {
1106         int i;
1107
1108         for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1109                 if (ctrl->id == vivi_qctrl[i].id) {
1110                         ctrl->value=qctl_regs[i];
1111                         return (0);
1112                 }
1113
1114         return -EINVAL;
1115 }
1116 static int vidioc_s_ctrl (struct file *file, void *priv,
1117                                 struct v4l2_control *ctrl)
1118 {
1119         int i;
1120
1121         for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1122                 if (ctrl->id == vivi_qctrl[i].id) {
1123                         if (ctrl->value <
1124                                 vivi_qctrl[i].minimum
1125                                 || ctrl->value >
1126                                 vivi_qctrl[i].maximum) {
1127                                         return (-ERANGE);
1128                                 }
1129                         qctl_regs[i]=ctrl->value;
1130                         return (0);
1131                 }
1132         return -EINVAL;
1133 }
1134
1135 /* ------------------------------------------------------------------
1136         File operations for the device
1137    ------------------------------------------------------------------*/
1138
1139 #define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
1140
1141 static int vivi_open(struct inode *inode, struct file *file)
1142 {
1143         int minor = iminor(inode);
1144         struct vivi_dev *h,*dev = NULL;
1145         struct vivi_fh *fh;
1146         struct list_head *list;
1147         enum v4l2_buf_type type = 0;
1148         int i;
1149
1150         printk(KERN_DEBUG "vivi: open called (minor=%d)\n",minor);
1151
1152         list_for_each(list,&vivi_devlist) {
1153                 h = list_entry(list, struct vivi_dev, vivi_devlist);
1154                 if (h->vfd.minor == minor) {
1155                         dev  = h;
1156                         type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1157                 }
1158         }
1159         if (NULL == dev)
1160                 return -ENODEV;
1161
1162
1163
1164         /* If more than one user, mutex should be added */
1165         dev->users++;
1166
1167         dprintk(1,"open minor=%d type=%s users=%d\n",
1168                                 minor,v4l2_type_names[type],dev->users);
1169
1170         /* allocate + initialize per filehandle data */
1171         fh = kzalloc(sizeof(*fh),GFP_KERNEL);
1172         if (NULL == fh) {
1173                 dev->users--;
1174                 return -ENOMEM;
1175         }
1176
1177         file->private_data = fh;
1178         fh->dev      = dev;
1179
1180         fh->type     = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1181         fh->fmt      = &format;
1182         fh->width    = 640;
1183         fh->height   = 480;
1184
1185         /* Put all controls at a sane state */
1186         for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1187                 qctl_regs[i] =vivi_qctrl[i].default_value;
1188
1189         dprintk(1,"Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1190                 (unsigned long)fh,(unsigned long)dev,(unsigned long)&dev->vidq);
1191         dprintk(1,"Open: list_empty queued=%d\n",list_empty(&dev->vidq.queued));
1192         dprintk(1,"Open: list_empty active=%d\n",list_empty(&dev->vidq.active));
1193
1194         /* Resets frame counters */
1195         dev->h=0;
1196         dev->m=0;
1197         dev->s=0;
1198         dev->us=0;
1199         dev->jiffies=jiffies;
1200         sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
1201                         dev->h,dev->m,dev->s,(dev->us+500)/1000);
1202
1203         videobuf_queue_init(&fh->vb_vidq, &vivi_video_qops,
1204                         NULL, NULL,
1205                         fh->type,
1206                         V4L2_FIELD_INTERLACED,
1207                         sizeof(struct vivi_buffer),fh);
1208
1209         return 0;
1210 }
1211
1212 static ssize_t
1213 vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1214 {
1215         struct vivi_fh        *fh = file->private_data;
1216
1217         if (fh->type==V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1218                 if (res_locked(fh->dev))
1219                         return -EBUSY;
1220                 return videobuf_read_one(&fh->vb_vidq, data, count, ppos,
1221                                         file->f_flags & O_NONBLOCK);
1222         }
1223         return 0;
1224 }
1225
1226 static unsigned int
1227 vivi_poll(struct file *file, struct poll_table_struct *wait)
1228 {
1229         struct vivi_fh        *fh = file->private_data;
1230         struct vivi_buffer    *buf;
1231
1232         dprintk(1,"%s\n",__FUNCTION__);
1233
1234         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1235                 return POLLERR;
1236
1237         if (res_get(fh->dev,fh)) {
1238                 dprintk(1,"poll: mmap interface\n");
1239                 /* streaming capture */
1240                 if (list_empty(&fh->vb_vidq.stream))
1241                         return POLLERR;
1242                 buf = list_entry(fh->vb_vidq.stream.next,struct vivi_buffer,vb.stream);
1243         } else {
1244                 dprintk(1,"poll: read() interface\n");
1245                 /* read() capture */
1246                 buf = (struct vivi_buffer*)fh->vb_vidq.read_buf;
1247                 if (NULL == buf)
1248                         return POLLERR;
1249         }
1250         poll_wait(file, &buf->vb.done, wait);
1251         if (buf->vb.state == STATE_DONE ||
1252             buf->vb.state == STATE_ERROR)
1253                 return POLLIN|POLLRDNORM;
1254         return 0;
1255 }
1256
1257 static int vivi_release(struct inode *inode, struct file *file)
1258 {
1259         struct vivi_fh         *fh = file->private_data;
1260         struct vivi_dev *dev       = fh->dev;
1261         struct vivi_dmaqueue *vidq = &dev->vidq;
1262
1263         int minor = iminor(inode);
1264
1265         vivi_stop_thread(vidq);
1266         videobuf_mmap_free(&fh->vb_vidq);
1267
1268         kfree (fh);
1269
1270         dev->users--;
1271
1272         printk(KERN_DEBUG "vivi: close called (minor=%d, users=%d)\n",minor,dev->users);
1273
1274         return 0;
1275 }
1276
1277 static int
1278 vivi_mmap(struct file *file, struct vm_area_struct * vma)
1279 {
1280         struct vivi_fh        *fh = file->private_data;
1281         int ret;
1282
1283         dprintk (1,"mmap called, vma=0x%08lx\n",(unsigned long)vma);
1284
1285         ret=videobuf_mmap_mapper(&fh->vb_vidq, vma);
1286
1287         dprintk (1,"vma start=0x%08lx, size=%ld, ret=%d\n",
1288                 (unsigned long)vma->vm_start,
1289                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1290                 ret);
1291
1292         return ret;
1293 }
1294
1295 static const struct file_operations vivi_fops = {
1296         .owner          = THIS_MODULE,
1297         .open           = vivi_open,
1298         .release        = vivi_release,
1299         .read           = vivi_read,
1300         .poll           = vivi_poll,
1301         .ioctl          = video_ioctl2, /* V4L2 ioctl handler */
1302         .mmap           = vivi_mmap,
1303         .llseek         = no_llseek,
1304 };
1305
1306 static struct video_device vivi = {
1307         .name           = "vivi",
1308         .type           = VID_TYPE_CAPTURE,
1309         .hardware       = 0,
1310         .fops           = &vivi_fops,
1311         .minor          = -1,
1312 //      .release        = video_device_release,
1313
1314         .vidioc_querycap      = vidioc_querycap,
1315         .vidioc_enum_fmt_cap  = vidioc_enum_fmt_cap,
1316         .vidioc_g_fmt_cap     = vidioc_g_fmt_cap,
1317         .vidioc_try_fmt_cap   = vidioc_try_fmt_cap,
1318         .vidioc_s_fmt_cap     = vidioc_s_fmt_cap,
1319         .vidioc_reqbufs       = vidioc_reqbufs,
1320         .vidioc_querybuf      = vidioc_querybuf,
1321         .vidioc_qbuf          = vidioc_qbuf,
1322         .vidioc_dqbuf         = vidioc_dqbuf,
1323         .vidioc_s_std         = vidioc_s_std,
1324         .vidioc_enum_input    = vidioc_enum_input,
1325         .vidioc_g_input       = vidioc_g_input,
1326         .vidioc_s_input       = vidioc_s_input,
1327         .vidioc_queryctrl     = vidioc_queryctrl,
1328         .vidioc_g_ctrl        = vidioc_g_ctrl,
1329         .vidioc_s_ctrl        = vidioc_s_ctrl,
1330         .vidioc_streamon      = vidioc_streamon,
1331         .vidioc_streamoff     = vidioc_streamoff,
1332 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1333         .vidiocgmbuf          = vidiocgmbuf,
1334 #endif
1335         .tvnorms              = V4L2_STD_NTSC_M,
1336         .current_norm         = V4L2_STD_NTSC_M,
1337 };
1338 /* -----------------------------------------------------------------
1339         Initialization and module stuff
1340    ------------------------------------------------------------------*/
1341
1342 static int __init vivi_init(void)
1343 {
1344         int ret;
1345         struct vivi_dev *dev;
1346
1347         dev = kzalloc(sizeof(*dev),GFP_KERNEL);
1348         if (NULL == dev)
1349                 return -ENOMEM;
1350         list_add_tail(&dev->vivi_devlist,&vivi_devlist);
1351
1352         /* init video dma queues */
1353         INIT_LIST_HEAD(&dev->vidq.active);
1354         INIT_LIST_HEAD(&dev->vidq.queued);
1355
1356         /* initialize locks */
1357         init_MUTEX(&dev->lock);
1358
1359         dev->vidq.timeout.function = vivi_vid_timeout;
1360         dev->vidq.timeout.data     = (unsigned long)dev;
1361         init_timer(&dev->vidq.timeout);
1362
1363         ret = video_register_device(&vivi, VFL_TYPE_GRABBER, video_nr);
1364         printk(KERN_INFO "Video Technology Magazine Virtual Video Capture Board (Load status: %d)\n", ret);
1365         return ret;
1366 }
1367
1368 static void __exit vivi_exit(void)
1369 {
1370         struct vivi_dev *h;
1371         struct list_head *list;
1372
1373         while (!list_empty(&vivi_devlist)) {
1374                 list = vivi_devlist.next;
1375                 list_del(list);
1376                 h = list_entry(list, struct vivi_dev, vivi_devlist);
1377                 kfree (h);
1378         }
1379         video_unregister_device(&vivi);
1380 }
1381
1382 module_init(vivi_init);
1383 module_exit(vivi_exit);
1384
1385 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
1386 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
1387 MODULE_LICENSE("Dual BSD/GPL");
1388
1389 module_param(video_nr, int, 0);
1390
1391 module_param_named(debug,vivi.debug, int, 0644);
1392 MODULE_PARM_DESC(debug,"activates debug info");
1393
1394 module_param(vid_limit,int,0644);
1395 MODULE_PARM_DESC(vid_limit,"capture memory limit in megabytes");
1396