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         }
 481         if (bc != 1)
 482                 dprintk(1,"%s: %d buffers handled (should be 1)\n",__FUNCTION__,bc);
 483 }
 484
 485 static void vivi_sleep(struct vivi_dmaqueue  *dma_q)
 486 {
 487         int timeout;
 488         DECLARE_WAITQUEUE(wait, current);
 489
 490         dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
 491
 492         add_wait_queue(&dma_q->wq, &wait);
 493         if (!kthread_should_stop()) {
 494                 dma_q->frame++;
 495
 496                 /* Calculate time to wake up */
 497                 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
 498
 499                 if (timeout <= 0) {
 500                         int old=dma_q->frame;
 501                         dma_q->frame=(jiffies_to_msecs(jiffies-dma_q->ini_jiffies)*WAKE_DENOMINATOR)/(WAKE_NUMERATOR*1000)+1;
 502
 503                         timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
 504
 505                         dprintk(1,"underrun, losed %d frames. "
 506                                   "Now, frame is %d. Waking on %d jiffies\n",
 507                                         dma_q->frame-old,dma_q->frame,timeout);
 508                 } else
 509                         dprintk(1,"will sleep for %i jiffies\n",timeout);
 510
 511                 vivi_thread_tick(dma_q);
 512
 513                 schedule_timeout_interruptible (timeout);
 514         }
 515
 516         remove_wait_queue(&dma_q->wq, &wait);
 517         try_to_freeze();
 518 }
 519
 520 static int vivi_thread(void *data)
 521 {
 522         struct vivi_dmaqueue  *dma_q=data;
 523
 524         dprintk(1,"thread started\n");
 525
 526         mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 527
 528         for (;;) {
 529                 vivi_sleep(dma_q);
 530
 531                 if (kthread_should_stop())
 532                         break;
 533         }
 534         dprintk(1, "thread: exit\n");
 535         return 0;
 536 }
 537
 538 static int vivi_start_thread(struct vivi_dmaqueue  *dma_q)
 539 {
 540         dma_q->frame=0;
 541         dma_q->ini_jiffies=jiffies;
 542
 543         dprintk(1,"%s\n",__FUNCTION__);
 544
 545         dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi");
 546
 547         if (IS_ERR(dma_q->kthread)) {
 548                 printk(KERN_ERR "vivi: kernel_thread() failed\n");
 549                 return PTR_ERR(dma_q->kthread);
 550         }
 551         /* Wakes thread */
 552         wake_up_interruptible(&dma_q->wq);
 553
 554         dprintk(1,"returning from %s\n",__FUNCTION__);
 555         return 0;
 556 }
 557
 558 static void vivi_stop_thread(struct vivi_dmaqueue  *dma_q)
 559 {
 560         dprintk(1,"%s\n",__FUNCTION__);
 561         /* shutdown control thread */
 562         if (dma_q->kthread) {
 563                 kthread_stop(dma_q->kthread);
 564                 dma_q->kthread=NULL;
 565         }
 566 }
 567
 568 static int restart_video_queue(struct vivi_dmaqueue *dma_q)
 569 {
 570         struct vivi_buffer *buf, *prev;
 571         struct list_head *item;
 572
 573         dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
 574
 575         if (!list_empty(&dma_q->active)) {
 576                 buf = list_entry(dma_q->active.next, struct vivi_buffer, vb.queue);
 577                 dprintk(2,"restart_queue [%p/%d]: restart dma\n",
 578                         buf, buf->vb.i);
 579
 580                 dprintk(1,"Restarting video dma\n");
 581                 vivi_stop_thread(dma_q);
 582 //              vivi_start_thread(dma_q);
 583
 584                 /* cancel all outstanding capture / vbi requests */
 585                 list_for_each(item,&dma_q->active) {
 586                         buf = list_entry(item, struct vivi_buffer, vb.queue);
 587
 588                         list_del(&buf->vb.queue);
 589                         buf->vb.state = STATE_ERROR;
 590                         wake_up(&buf->vb.done);
 591                 }
 592                 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 593
 594                 return 0;
 595         }
 596
 597         prev = NULL;
 598         for (;;) {
 599                 if (list_empty(&dma_q->queued))
 600                         return 0;
 601                 buf = list_entry(dma_q->queued.next, struct vivi_buffer, vb.queue);
 602                 if (NULL == prev) {
 603                         list_del(&buf->vb.queue);
 604                         list_add_tail(&buf->vb.queue,&dma_q->active);
 605
 606                         dprintk(1,"Restarting video dma\n");
 607                         vivi_stop_thread(dma_q);
 608                         vivi_start_thread(dma_q);
 609
 610                         buf->vb.state = STATE_ACTIVE;
 611                         mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 612                         dprintk(2,"[%p/%d] restart_queue - first active\n",
 613                                 buf,buf->vb.i);
 614
 615                 } else if (prev->vb.width  == buf->vb.width  &&
 616                            prev->vb.height == buf->vb.height &&
 617                            prev->fmt       == buf->fmt) {
 618                         list_del(&buf->vb.queue);
 619                         list_add_tail(&buf->vb.queue,&dma_q->active);
 620                         buf->vb.state = STATE_ACTIVE;
 621                         dprintk(2,"[%p/%d] restart_queue - move to active\n",
 622                                 buf,buf->vb.i);
 623                 } else {
 624                         return 0;
 625                 }
 626                 prev = buf;
 627         }
 628 }
 629
 630 static void vivi_vid_timeout(unsigned long data)
 631 {
 632         struct vivi_dev      *dev  = (struct vivi_dev*)data;
 633         struct vivi_dmaqueue *vidq = &dev->vidq;
 634         struct vivi_buffer   *buf;
 635
 636         while (!list_empty(&vidq->active)) {
 637                 buf = list_entry(vidq->active.next, struct vivi_buffer, vb.queue);
 638                 list_del(&buf->vb.queue);
 639                 buf->vb.state = STATE_ERROR;
 640                 wake_up(&buf->vb.done);
 641                 printk("vivi/0: [%p/%d] timeout\n", buf, buf->vb.i);
 642         }
 643
 644         restart_video_queue(vidq);
 645 }
 646
 647 /* ------------------------------------------------------------------
 648         Videobuf operations
 649    ------------------------------------------------------------------*/
 650 static int
 651 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 652 {
 653         struct vivi_fh *fh = vq->priv_data;
 654
 655         *size = fh->width*fh->height*2;
 656
 657         if (0 == *count)
 658                 *count = 32;
 659         while (*size * *count > vid_limit * 1024 * 1024)
 660                 (*count)--;
 661         return 0;
 662 }
 663
 664 static void free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
 665 {
 666         dprintk(1,"%s\n",__FUNCTION__);
 667
 668         if (in_interrupt())
 669                 BUG();
 670
 671         /*FIXME: Maybe a spinlock is required here */
 672         kfree(buf->to_addr);
 673         buf->to_addr=NULL;
 674
 675         videobuf_waiton(&buf->vb,0,0);
 676         videobuf_dma_unmap(vq, &buf->vb.dma);
 677         videobuf_dma_free(&buf->vb.dma);
 678         buf->vb.state = STATE_NEEDS_INIT;
 679 }
 680
 681 #define norm_maxw() 1024
 682 #define norm_maxh() 768
 683 static int
 684 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 685                                                 enum v4l2_field field)
 686 {
 687         struct vivi_fh     *fh  = vq->priv_data;
 688         struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
 689         int rc, init_buffer = 0;
 690
 691 //      dprintk(1,"%s, field=%d\n",__FUNCTION__,field);
 692
 693         BUG_ON(NULL == fh->fmt);
 694         if (fh->width  < 48 || fh->width  > norm_maxw() ||
 695             fh->height < 32 || fh->height > norm_maxh())
 696                 return -EINVAL;
 697         buf->vb.size = fh->width*fh->height*2;
 698         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
 699                 return -EINVAL;
 700
 701         if (buf->fmt       != fh->fmt    ||
 702             buf->vb.width  != fh->width  ||
 703             buf->vb.height != fh->height ||
 704         buf->vb.field  != field) {
 705                 buf->fmt       = fh->fmt;
 706                 buf->vb.width  = fh->width;
 707                 buf->vb.height = fh->height;
 708                 buf->vb.field  = field;
 709                 init_buffer = 1;
 710         }
 711
 712         if (STATE_NEEDS_INIT == buf->vb.state) {
 713                 if (0 != (rc = videobuf_iolock(vq,&buf->vb,NULL)))
 714                         goto fail;
 715         }
 716
 717         buf->vb.state = STATE_PREPARED;
 718
 719         if (NULL == (buf->to_addr = kmalloc(sizeof(*buf->to_addr) * vb->dma.nr_pages,GFP_KERNEL))) {
 720                 rc=-ENOMEM;
 721                 goto fail;
 722         }
 723
 724         return 0;
 725
 726 fail:
 727         free_buffer(vq,buf);
 728         return rc;
 729 }
 730
 731 static void
 732 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 733 {
 734         struct vivi_buffer    *buf     = container_of(vb,struct vivi_buffer,vb);
 735         struct vivi_fh        *fh      = vq->priv_data;
 736         struct vivi_dev       *dev     = fh->dev;
 737         struct vivi_dmaqueue  *vidq    = &dev->vidq;
 738         struct vivi_buffer    *prev;
 739
 740         if (!list_empty(&vidq->queued)) {
 741                 dprintk(1,"adding vb queue=0x%08lx\n",(unsigned long)&buf->vb.queue);
 742                 list_add_tail(&buf->vb.queue,&vidq->queued);
 743                 buf->vb.state = STATE_QUEUED;
 744                 dprintk(2,"[%p/%d] buffer_queue - append to queued\n",
 745                         buf, buf->vb.i);
 746         } else if (list_empty(&vidq->active)) {
 747                 list_add_tail(&buf->vb.queue,&vidq->active);
 748
 749                 buf->vb.state = STATE_ACTIVE;
 750                 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
 751                 dprintk(2,"[%p/%d] buffer_queue - first active\n",
 752                         buf, buf->vb.i);
 753
 754                 vivi_start_thread(vidq);
 755         } else {
 756                 prev = list_entry(vidq->active.prev, struct vivi_buffer, vb.queue);
 757                 if (prev->vb.width  == buf->vb.width  &&
 758                     prev->vb.height == buf->vb.height &&
 759                     prev->fmt       == buf->fmt) {
 760                         list_add_tail(&buf->vb.queue,&vidq->active);
 761                         buf->vb.state = STATE_ACTIVE;
 762                         dprintk(2,"[%p/%d] buffer_queue - append to active\n",
 763                                 buf, buf->vb.i);
 764
 765                 } else {
 766                         list_add_tail(&buf->vb.queue,&vidq->queued);
 767                         buf->vb.state = STATE_QUEUED;
 768                         dprintk(2,"[%p/%d] buffer_queue - first queued\n",
 769                                 buf, buf->vb.i);
 770                 }
 771         }
 772 }
 773
 774 static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 775 {
 776         struct vivi_buffer   *buf  = container_of(vb,struct vivi_buffer,vb);
 777         struct vivi_fh       *fh   = vq->priv_data;
 778         struct vivi_dev      *dev  = (struct vivi_dev*)fh->dev;
 779         struct vivi_dmaqueue *vidq = &dev->vidq;
 780
 781         dprintk(1,"%s\n",__FUNCTION__);
 782
 783         vivi_stop_thread(vidq);
 784
 785         free_buffer(vq,buf);
 786 }
 787
 788 static int vivi_map_sg(void *dev, struct scatterlist *sg, int nents,
 789                        int direction)
 790 {
 791         int i;
 792
 793         dprintk(1,"%s, number of pages=%d\n",__FUNCTION__,nents);
 794         BUG_ON(direction == DMA_NONE);
 795
 796         for (i = 0; i < nents; i++ ) {
 797                 BUG_ON(!sg[i].page);
 798
 799                 sg_dma_address(&sg[i]) = page_to_phys(sg[i].page) + sg[i].offset;
 800         }
 801
 802         return nents;
 803 }
 804
 805 static int vivi_unmap_sg(void *dev,struct scatterlist *sglist,int nr_pages,
 806                          int direction)
 807 {
 808         dprintk(1,"%s\n",__FUNCTION__);
 809         return 0;
 810 }
 811
 812 static int vivi_dma_sync_sg(void *dev,struct scatterlist *sglist, int nr_pages,
 813                             int direction)
 814 {
 815 //      dprintk(1,"%s\n",__FUNCTION__);
 816
 817 //      flush_write_buffers();
 818         return 0;
 819 }
 820
 821 static struct videobuf_queue_ops vivi_video_qops = {
 822         .buf_setup      = buffer_setup,
 823         .buf_prepare    = buffer_prepare,
 824         .buf_queue      = buffer_queue,
 825         .buf_release    = buffer_release,
 826
 827         /* Non-pci handling routines */
 828         .vb_map_sg      = vivi_map_sg,
 829         .vb_dma_sync_sg = vivi_dma_sync_sg,
 830         .vb_unmap_sg    = vivi_unmap_sg,
 831 };
 832
 833 /* ------------------------------------------------------------------
 834         IOCTL handling
 835    ------------------------------------------------------------------*/
 836
 837
 838 static int res_get(struct vivi_dev *dev, struct vivi_fh *fh)
 839 {
 840         /* is it free? */
 841         down(&dev->lock);
 842         if (dev->resources) {
 843                 /* no, someone else uses it */
 844                 up(&dev->lock);
 845                 return 0;
 846         }
 847         /* it's free, grab it */
 848         dev->resources =1;
 849         dprintk(1,"res: get\n");
 850         up(&dev->lock);
 851         return 1;
 852 }
 853
 854 static int res_locked(struct vivi_dev *dev)
 855 {
 856         return (dev->resources);
 857 }
 858
 859 static void res_free(struct vivi_dev *dev, struct vivi_fh *fh)
 860 {
 861         down(&dev->lock);
 862         dev->resources = 0;
 863         dprintk(1,"res: put\n");
 864         up(&dev->lock);
 865 }
 866
 867 /* ------------------------------------------------------------------
 868         IOCTL vidioc handling
 869    ------------------------------------------------------------------*/
 870 static int vidioc_querycap (struct file *file, void  *priv,
 871                                         struct v4l2_capability *cap)
 872 {
 873         strcpy(cap->driver, "vivi");
 874         strcpy(cap->card, "vivi");
 875         cap->version = VIVI_VERSION;
 876         cap->capabilities =     V4L2_CAP_VIDEO_CAPTURE |
 877                                 V4L2_CAP_STREAMING     |
 878                                 V4L2_CAP_READWRITE;
 879         return 0;
 880 }
 881
 882 static int vidioc_enum_fmt_cap (struct file *file, void  *priv,
 883                                         struct v4l2_fmtdesc *f)
 884 {
 885         if (f->index > 0)
 886                 return -EINVAL;
 887
 888         strlcpy(f->description,format.name,sizeof(f->description));
 889         f->pixelformat = format.fourcc;
 890         return 0;
 891 }
 892
 893 static int vidioc_g_fmt_cap (struct file *file, void *priv,
 894                                         struct v4l2_format *f)
 895 {
 896         struct vivi_fh  *fh=priv;
 897
 898         f->fmt.pix.width        = fh->width;
 899         f->fmt.pix.height       = fh->height;
 900         f->fmt.pix.field        = fh->vb_vidq.field;
 901         f->fmt.pix.pixelformat  = fh->fmt->fourcc;
 902         f->fmt.pix.bytesperline =
 903                 (f->fmt.pix.width * fh->fmt->depth) >> 3;
 904         f->fmt.pix.sizeimage =
 905                 f->fmt.pix.height * f->fmt.pix.bytesperline;
 906
 907         return (0);
 908 }
 909
 910 static int vidioc_try_fmt_cap (struct file *file, void *priv,
 911                         struct v4l2_format *f)
 912 {
 913         struct vivi_fmt *fmt;
 914         enum v4l2_field field;
 915         unsigned int maxw, maxh;
 916
 917         if (format.fourcc != f->fmt.pix.pixelformat) {
 918                 dprintk(1,"Fourcc format (0x%08x) invalid. Driver accepts "
 919                         "only 0x%08x\n",f->fmt.pix.pixelformat,format.fourcc);
 920                 return -EINVAL;
 921         }
 922         fmt=&format;
 923
 924         field = f->fmt.pix.field;
 925
 926         if (field == V4L2_FIELD_ANY) {
 927 //              field=V4L2_FIELD_INTERLACED;
 928                 field=V4L2_FIELD_SEQ_TB;
 929         } else if (V4L2_FIELD_INTERLACED != field) {
 930                 dprintk(1,"Field type invalid.\n");
 931                 return -EINVAL;
 932         }
 933
 934         maxw  = norm_maxw();
 935         maxh  = norm_maxh();
 936
 937         f->fmt.pix.field = field;
 938         if (f->fmt.pix.height < 32)
 939                 f->fmt.pix.height = 32;
 940         if (f->fmt.pix.height > maxh)
 941                 f->fmt.pix.height = maxh;
 942         if (f->fmt.pix.width < 48)
 943                 f->fmt.pix.width = 48;
 944         if (f->fmt.pix.width > maxw)
 945                 f->fmt.pix.width = maxw;
 946         f->fmt.pix.width &= ~0x03;
 947         f->fmt.pix.bytesperline =
 948                 (f->fmt.pix.width * fmt->depth) >> 3;
 949         f->fmt.pix.sizeimage =
 950                 f->fmt.pix.height * f->fmt.pix.bytesperline;
 951
 952         return 0;
 953 }
 954
 955 /*FIXME: This seems to be generic enough to be at videodev2 */
 956 static int vidioc_s_fmt_cap (struct file *file, void *priv,
 957                                         struct v4l2_format *f)
 958 {
 959         struct vivi_fh  *fh=priv;
 960         int ret = vidioc_try_fmt_cap(file,fh,f);
 961         if (ret < 0)
 962                 return (ret);
 963
 964         fh->fmt           = &format;
 965         fh->width         = f->fmt.pix.width;
 966         fh->height        = f->fmt.pix.height;
 967         fh->vb_vidq.field = f->fmt.pix.field;
 968         fh->type          = f->type;
 969
 970         return (0);
 971 }
 972
 973 static int vidioc_reqbufs (struct file *file, void *priv, struct v4l2_requestbuffers *p)
 974 {
 975         struct vivi_fh  *fh=priv;
 976
 977         return (videobuf_reqbufs(&fh->vb_vidq, p));
 978 }
 979
 980 static int vidioc_querybuf (struct file *file, void *priv, struct v4l2_buffer *p)
 981 {
 982         struct vivi_fh  *fh=priv;
 983
 984         return (videobuf_querybuf(&fh->vb_vidq, p));
 985 }
 986
 987 static int vidioc_qbuf (struct file *file, void *priv, struct v4l2_buffer *p)
 988 {
 989         struct vivi_fh  *fh=priv;
 990
 991         return (videobuf_qbuf(&fh->vb_vidq, p));
 992 }
 993
 994 static int vidioc_dqbuf (struct file *file, void *priv, struct v4l2_buffer *p)
 995 {
 996         struct vivi_fh  *fh=priv;
 997
 998         return (videobuf_dqbuf(&fh->vb_vidq, p,
 999                                 file->f_flags & O_NONBLOCK));
1000 }
1001
1002 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1003 static int vidiocgmbuf (struct file *file, void *priv, struct video_mbuf *mbuf)
1004 {
1005         struct vivi_fh  *fh=priv;
1006         struct videobuf_queue *q=&fh->vb_vidq;
1007         struct v4l2_requestbuffers req;
1008         unsigned int i;
1009         int ret;
1010
1011         req.type   = q->type;
1012         req.count  = 8;
1013         req.memory = V4L2_MEMORY_MMAP;
1014         ret = videobuf_reqbufs(q,&req);
1015         if (ret < 0)
1016                 return (ret);
1017
1018         mbuf->frames = req.count;
1019         mbuf->size   = 0;
1020         for (i = 0; i < mbuf->frames; i++) {
1021                 mbuf->offsets[i]  = q->bufs[i]->boff;
1022                 mbuf->size       += q->bufs[i]->bsize;
1023         }
1024         return (0);
1025 }
1026 #endif
1027
1028 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
1029 {
1030         struct vivi_fh  *fh=priv;
1031         struct vivi_dev *dev    = fh->dev;
1032
1033         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1034                 return -EINVAL;
1035         if (i != fh->type)
1036                 return -EINVAL;
1037
1038         if (!res_get(dev,fh))
1039                 return -EBUSY;
1040         return (videobuf_streamon(&fh->vb_vidq));
1041 }
1042
1043 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
1044 {
1045         struct vivi_fh  *fh=priv;
1046         struct vivi_dev *dev    = fh->dev;
1047
1048         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1049                 return -EINVAL;
1050         if (i != fh->type)
1051                 return -EINVAL;
1052
1053         videobuf_streamoff(&fh->vb_vidq);
1054         res_free(dev,fh);
1055
1056         return (0);
1057 }
1058
1059 static int vidioc_s_std (struct file *file, void *priv, v4l2_std_id *i)
1060 {
1061         return 0;
1062 }
1063
1064 /* only one input in this sample driver */
1065 static int vidioc_enum_input (struct file *file, void *priv,
1066                                 struct v4l2_input *inp)
1067 {
1068         if (inp->index != 0)
1069                 return -EINVAL;
1070
1071         inp->type = V4L2_INPUT_TYPE_CAMERA;
1072         inp->std = V4L2_STD_NTSC_M;
1073         strcpy(inp->name,"Camera");
1074
1075         return (0);
1076 }
1077
1078 static int vidioc_g_input (struct file *file, void *priv, unsigned int *i)
1079 {
1080         *i = 0;
1081
1082         return (0);
1083 }
1084 static int vidioc_s_input (struct file *file, void *priv, unsigned int i)
1085 {
1086         if (i > 0)
1087                 return -EINVAL;
1088
1089         return (0);
1090 }
1091
1092         /* --- controls ---------------------------------------------- */
1093 static int vidioc_queryctrl (struct file *file, void *priv,
1094                                 struct v4l2_queryctrl *qc)
1095 {
1096         int i;
1097
1098         for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1099                 if (qc->id && qc->id == vivi_qctrl[i].id) {
1100                         memcpy(qc, &(vivi_qctrl[i]),
1101                                 sizeof(*qc));
1102                         return (0);
1103                 }
1104
1105         return -EINVAL;
1106 }
1107
1108 static int vidioc_g_ctrl (struct file *file, void *priv,
1109                                 struct v4l2_control *ctrl)
1110 {
1111         int i;
1112
1113         for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1114                 if (ctrl->id == vivi_qctrl[i].id) {
1115                         ctrl->value=qctl_regs[i];
1116                         return (0);
1117                 }
1118
1119         return -EINVAL;
1120 }
1121 static int vidioc_s_ctrl (struct file *file, void *priv,
1122                                 struct v4l2_control *ctrl)
1123 {
1124         int i;
1125
1126         for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1127                 if (ctrl->id == vivi_qctrl[i].id) {
1128                         if (ctrl->value <
1129                                 vivi_qctrl[i].minimum
1130                                 || ctrl->value >
1131                                 vivi_qctrl[i].maximum) {
1132                                         return (-ERANGE);
1133                                 }
1134                         qctl_regs[i]=ctrl->value;
1135                         return (0);
1136                 }
1137         return -EINVAL;
1138 }
1139
1140 /* ------------------------------------------------------------------
1141         File operations for the device
1142    ------------------------------------------------------------------*/
1143
1144 #define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
1145
1146 static int vivi_open(struct inode *inode, struct file *file)
1147 {
1148         int minor = iminor(inode);
1149         struct vivi_dev *h,*dev = NULL;
1150         struct vivi_fh *fh;
1151         struct list_head *list;
1152         enum v4l2_buf_type type = 0;
1153         int i;
1154
1155         printk(KERN_DEBUG "vivi: open called (minor=%d)\n",minor);
1156
1157         list_for_each(list,&vivi_devlist) {
1158                 h = list_entry(list, struct vivi_dev, vivi_devlist);
1159                 if (h->vfd.minor == minor) {
1160                         dev  = h;
1161                         type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1162                 }
1163         }
1164         if (NULL == dev)
1165                 return -ENODEV;
1166
1167
1168
1169         /* If more than one user, mutex should be added */
1170         dev->users++;
1171
1172         dprintk(1,"open minor=%d type=%s users=%d\n",
1173                                 minor,v4l2_type_names[type],dev->users);
1174
1175         /* allocate + initialize per filehandle data */
1176         fh = kzalloc(sizeof(*fh),GFP_KERNEL);
1177         if (NULL == fh) {
1178                 dev->users--;
1179                 return -ENOMEM;
1180         }
1181
1182         file->private_data = fh;
1183         fh->dev      = dev;
1184
1185         fh->type     = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1186         fh->fmt      = &format;
1187         fh->width    = 640;
1188         fh->height   = 480;
1189
1190         /* Put all controls at a sane state */
1191         for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1192                 qctl_regs[i] =vivi_qctrl[i].default_value;
1193
1194         dprintk(1,"Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1195                 (unsigned long)fh,(unsigned long)dev,(unsigned long)&dev->vidq);
1196         dprintk(1,"Open: list_empty queued=%d\n",list_empty(&dev->vidq.queued));
1197         dprintk(1,"Open: list_empty active=%d\n",list_empty(&dev->vidq.active));
1198
1199         /* Resets frame counters */
1200         dev->h=0;
1201         dev->m=0;
1202         dev->s=0;
1203         dev->us=0;
1204         dev->jiffies=jiffies;
1205         sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
1206                         dev->h,dev->m,dev->s,(dev->us+500)/1000);
1207
1208         videobuf_queue_init(&fh->vb_vidq, &vivi_video_qops,
1209                         NULL, NULL,
1210                         fh->type,
1211                         V4L2_FIELD_INTERLACED,
1212                         sizeof(struct vivi_buffer),fh);
1213
1214         return 0;
1215 }
1216
1217 static ssize_t
1218 vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1219 {
1220         struct vivi_fh        *fh = file->private_data;
1221
1222         if (fh->type==V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1223                 if (res_locked(fh->dev))
1224                         return -EBUSY;
1225                 return videobuf_read_one(&fh->vb_vidq, data, count, ppos,
1226                                         file->f_flags & O_NONBLOCK);
1227         }
1228         return 0;
1229 }
1230
1231 static unsigned int
1232 vivi_poll(struct file *file, struct poll_table_struct *wait)
1233 {
1234         struct vivi_fh        *fh = file->private_data;
1235         struct vivi_buffer    *buf;
1236
1237         dprintk(1,"%s\n",__FUNCTION__);
1238
1239         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1240                 return POLLERR;
1241
1242         if (res_get(fh->dev,fh)) {
1243                 dprintk(1,"poll: mmap interface\n");
1244                 /* streaming capture */
1245                 if (list_empty(&fh->vb_vidq.stream))
1246                         return POLLERR;
1247                 buf = list_entry(fh->vb_vidq.stream.next,struct vivi_buffer,vb.stream);
1248         } else {
1249                 dprintk(1,"poll: read() interface\n");
1250                 /* read() capture */
1251                 buf = (struct vivi_buffer*)fh->vb_vidq.read_buf;
1252                 if (NULL == buf)
1253                         return POLLERR;
1254         }
1255         poll_wait(file, &buf->vb.done, wait);
1256         if (buf->vb.state == STATE_DONE ||
1257             buf->vb.state == STATE_ERROR)
1258                 return POLLIN|POLLRDNORM;
1259         return 0;
1260 }
1261
1262 static int vivi_release(struct inode *inode, struct file *file)
1263 {
1264         struct vivi_fh         *fh = file->private_data;
1265         struct vivi_dev *dev       = fh->dev;
1266         struct vivi_dmaqueue *vidq = &dev->vidq;
1267
1268         int minor = iminor(inode);
1269
1270         vivi_stop_thread(vidq);
1271         videobuf_mmap_free(&fh->vb_vidq);
1272
1273         kfree (fh);
1274
1275         dev->users--;
1276
1277         printk(KERN_DEBUG "vivi: close called (minor=%d, users=%d)\n",minor,dev->users);
1278
1279         return 0;
1280 }
1281
1282 static int
1283 vivi_mmap(struct file *file, struct vm_area_struct * vma)
1284 {
1285         struct vivi_fh        *fh = file->private_data;
1286         int ret;
1287
1288         dprintk (1,"mmap called, vma=0x%08lx\n",(unsigned long)vma);
1289
1290         ret=videobuf_mmap_mapper(&fh->vb_vidq, vma);
1291
1292         dprintk (1,"vma start=0x%08lx, size=%ld, ret=%d\n",
1293                 (unsigned long)vma->vm_start,
1294                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1295                 ret);
1296
1297         return ret;
1298 }
1299
1300 static const struct file_operations vivi_fops = {
1301         .owner          = THIS_MODULE,
1302         .open           = vivi_open,
1303         .release        = vivi_release,
1304         .read           = vivi_read,
1305         .poll           = vivi_poll,
1306         .ioctl          = video_ioctl2, /* V4L2 ioctl handler */
1307         .mmap           = vivi_mmap,
1308         .llseek         = no_llseek,
1309 };
1310
1311 static struct video_device vivi = {
1312         .name           = "vivi",
1313         .type           = VID_TYPE_CAPTURE,
1314         .hardware       = 0,
1315         .fops           = &vivi_fops,
1316         .minor          = -1,
1317 //      .release        = video_device_release,
1318
1319         .vidioc_querycap      = vidioc_querycap,
1320         .vidioc_enum_fmt_cap  = vidioc_enum_fmt_cap,
1321         .vidioc_g_fmt_cap     = vidioc_g_fmt_cap,
1322         .vidioc_try_fmt_cap   = vidioc_try_fmt_cap,
1323         .vidioc_s_fmt_cap     = vidioc_s_fmt_cap,
1324         .vidioc_reqbufs       = vidioc_reqbufs,
1325         .vidioc_querybuf      = vidioc_querybuf,
1326         .vidioc_qbuf          = vidioc_qbuf,
1327         .vidioc_dqbuf         = vidioc_dqbuf,
1328         .vidioc_s_std         = vidioc_s_std,
1329         .vidioc_enum_input    = vidioc_enum_input,
1330         .vidioc_g_input       = vidioc_g_input,
1331         .vidioc_s_input       = vidioc_s_input,
1332         .vidioc_queryctrl     = vidioc_queryctrl,
1333         .vidioc_g_ctrl        = vidioc_g_ctrl,
1334         .vidioc_s_ctrl        = vidioc_s_ctrl,
1335         .vidioc_streamon      = vidioc_streamon,
1336         .vidioc_streamoff     = vidioc_streamoff,
1337 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1338         .vidiocgmbuf          = vidiocgmbuf,
1339 #endif
1340         .tvnorms              = V4L2_STD_NTSC_M,
1341         .current_norm         = V4L2_STD_NTSC_M,
1342 };
1343 /* -----------------------------------------------------------------
1344         Initialization and module stuff
1345    ------------------------------------------------------------------*/
1346
1347 static int __init vivi_init(void)
1348 {
1349         int ret;
1350         struct vivi_dev *dev;
1351
1352         dev = kzalloc(sizeof(*dev),GFP_KERNEL);
1353         if (NULL == dev)
1354                 return -ENOMEM;
1355         list_add_tail(&dev->vivi_devlist,&vivi_devlist);
1356
1357         /* init video dma queues */
1358         INIT_LIST_HEAD(&dev->vidq.active);
1359         INIT_LIST_HEAD(&dev->vidq.queued);
1360         init_waitqueue_head(&dev->vidq.wq);
1361
1362         /* initialize locks */
1363         init_MUTEX(&dev->lock);
1364
1365         dev->vidq.timeout.function = vivi_vid_timeout;
1366         dev->vidq.timeout.data     = (unsigned long)dev;
1367         init_timer(&dev->vidq.timeout);
1368
1369         ret = video_register_device(&vivi, VFL_TYPE_GRABBER, video_nr);
1370         printk(KERN_INFO "Video Technology Magazine Virtual Video Capture Board (Load status: %d)\n", ret);
1371         return ret;
1372 }
1373
1374 static void __exit vivi_exit(void)
1375 {
1376         struct vivi_dev *h;
1377         struct list_head *list;
1378
1379         while (!list_empty(&vivi_devlist)) {
1380                 list = vivi_devlist.next;
1381                 list_del(list);
1382                 h = list_entry(list, struct vivi_dev, vivi_devlist);
1383                 kfree (h);
1384         }
1385         video_unregister_device(&vivi);
1386 }
1387
1388 module_init(vivi_init);
1389 module_exit(vivi_exit);
1390
1391 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
1392 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
1393 MODULE_LICENSE("Dual BSD/GPL");
1394
1395 module_param(video_nr, int, 0);
1396
1397 module_param_named(debug,vivi.debug, int, 0644);
1398 MODULE_PARM_DESC(debug,"activates debug info");
1399
1400 module_param(vid_limit,int,0644);
1401 MODULE_PARM_DESC(vid_limit,"capture memory limit in megabytes");
1402