git.oblomov.eu Git - linux-2.6/blob - 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
  40 /* Wake up at about 30 fps */
  41 #define WAKE_NUMERATOR 30
  42 #define WAKE_DENOMINATOR 1001
  43 #define BUFFER_TIMEOUT     msecs_to_jiffies(500)  /* 0.5 seconds */
  44
  45 /* These timers are for 1 fps - used only for testing */
  46 //#define WAKE_DENOMINATOR 30 /* hack for testing purposes */
  47 //#define BUFFER_TIMEOUT     msecs_to_jiffies(5000)  /* 5 seconds */
  48
  49 #include "font.h"
  50
  51 #define VIVI_MAJOR_VERSION 0
  52 #define VIVI_MINOR_VERSION 4
  53 #define VIVI_RELEASE 0
  54 #define VIVI_VERSION KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE)
  55
  56 /* Declare static vars that will be used as parameters */
  57 static unsigned int vid_limit = 16;     /* Video memory limit, in Mb */
  58 static struct video_device vivi;        /* Video device */
  59 static int video_nr = -1;               /* /dev/videoN, -1 for autodetect */
  60
  61 /* supported controls */
  62 static struct v4l2_queryctrl vivi_qctrl[] = {
  63         {
  64                 .id            = V4L2_CID_AUDIO_VOLUME,
  65                 .name          = "Volume",
  66                 .minimum       = 0,
  67                 .maximum       = 65535,
  68                 .step          = 65535/100,
  69                 .default_value = 65535,
  70                 .flags         = 0,
  71                 .type          = V4L2_CTRL_TYPE_INTEGER,
  72         },{
  73                 .id            = V4L2_CID_BRIGHTNESS,
  74                 .type          = V4L2_CTRL_TYPE_INTEGER,
  75                 .name          = "Brightness",
  76                 .minimum       = 0,
  77                 .maximum       = 255,
  78                 .step          = 1,
  79                 .default_value = 127,
  80                 .flags         = 0,
  81         }, {
  82                 .id            = V4L2_CID_CONTRAST,
  83                 .type          = V4L2_CTRL_TYPE_INTEGER,
  84                 .name          = "Contrast",
  85                 .minimum       = 0,
  86                 .maximum       = 255,
  87                 .step          = 0x1,
  88                 .default_value = 0x10,
  89                 .flags         = 0,
  90         }, {
  91                 .id            = V4L2_CID_SATURATION,
  92                 .type          = V4L2_CTRL_TYPE_INTEGER,
  93                 .name          = "Saturation",
  94                 .minimum       = 0,
  95                 .maximum       = 255,
  96                 .step          = 0x1,
  97                 .default_value = 127,
  98                 .flags         = 0,
  99         }, {
 100                 .id            = V4L2_CID_HUE,
 101                 .type          = V4L2_CTRL_TYPE_INTEGER,
 102                 .name          = "Hue",
 103                 .minimum       = -128,
 104                 .maximum       = 127,
 105                 .step          = 0x1,
 106                 .default_value = 0,
 107                 .flags         = 0,
 108         }
 109 };
 110
 111 static int qctl_regs[ARRAY_SIZE(vivi_qctrl)];
 112
 113 #define dprintk(level,fmt, arg...)                                      \
 114         do {                                                            \
 115                 if (vivi.debug >= (level))                              \
 116                         printk(KERN_DEBUG "vivi: " fmt , ## arg);       \
 117         } while (0)
 118
 119 /* ------------------------------------------------------------------
 120         Basic structures
 121    ------------------------------------------------------------------*/
 122
 123 struct vivi_fmt {
 124         char  *name;
 125         u32   fourcc;          /* v4l2 format id */
 126         int   depth;
 127 };
 128
 129 static struct vivi_fmt format = {
 130         .name     = "4:2:2, packed, YUYV",
 131         .fourcc   = V4L2_PIX_FMT_YUYV,
 132         .depth    = 16,
 133 };
 134
 135 struct sg_to_addr {
 136         int pos;
 137         struct scatterlist *sg;
 138 };
 139
 140 /* buffer for one video frame */
 141 struct vivi_buffer {
 142         /* common v4l buffer stuff -- must be first */
 143         struct videobuf_buffer vb;
 144
 145         struct vivi_fmt        *fmt;
 146
 147         struct sg_to_addr      *to_addr;
 148 };
 149
 150 struct vivi_dmaqueue {
 151         struct list_head       active;
 152         struct list_head       queued;
 153         struct timer_list      timeout;
 154
 155         /* thread for generating video stream*/
 156         struct task_struct         *kthread;
 157         wait_queue_head_t          wq;
 158         /* Counters to control fps rate */
 159         int                        frame;
 160         int                        ini_jiffies;
 161 };
 162
 163 static LIST_HEAD(vivi_devlist);
 164
 165 struct vivi_dev {
 166         struct list_head           vivi_devlist;
 167
 168         struct semaphore           lock;
 169
 170         int                        users;
 171
 172         /* various device info */
 173         unsigned int               resources;
 174         struct video_device        vfd;
 175
 176         struct vivi_dmaqueue       vidq;
 177
 178         /* Several counters */
 179         int                        h,m,s,us,jiffies;
 180         char                       timestr[13];
 181 };
 182
 183 struct vivi_fh {
 184         struct vivi_dev            *dev;
 185
 186         /* video capture */
 187         struct vivi_fmt            *fmt;
 188         unsigned int               width,height;
 189         struct videobuf_queue      vb_vidq;
 190
 191         enum v4l2_buf_type         type;
 192 };
 193
 194 /* ------------------------------------------------------------------
 195         DMA and thread functions
 196    ------------------------------------------------------------------*/
 197
 198 /* Bars and Colors should match positions */
 199
 200 enum colors {
 201         WHITE,
 202         AMBAR,
 203         CYAN,
 204         GREEN,
 205         MAGENTA,
 206         RED,
 207         BLUE
 208 };
 209
 210 static u8 bars[8][3] = {
 211         /* R   G   B */
 212         {204,204,204},  /* white */
 213         {208,208,  0},  /* ambar */
 214         {  0,206,206},  /* cyan */
 215         {  0,239,  0},  /* green */
 216         {239,  0,239},  /* magenta */
 217         {205,  0,  0},  /* red */
 218         {  0,  0,255},  /* blue */
 219         {  0,  0,  0}
 220 };
 221
 222 #define TO_Y(r,g,b) (((16829*r +33039*g +6416*b  + 32768)>>16)+16)
 223 /* RGB to  V(Cr) Color transform */
 224 #define TO_V(r,g,b) (((28784*r -24103*g -4681*b  + 32768)>>16)+128)
 225 /* RGB to  U(Cb) Color transform */
 226 #define TO_U(r,g,b) (((-9714*r -19070*g +28784*b + 32768)>>16)+128)
 227
 228 #define TSTAMP_MIN_Y 24
 229 #define TSTAMP_MAX_Y TSTAMP_MIN_Y+15
 230 #define TSTAMP_MIN_X 64
 231
 232 static void prep_to_addr(struct sg_to_addr to_addr[],
 233                          struct videobuf_buffer *vb)
 234 {
 235         int i, pos=0;
 236
 237         for (i=0;i<vb->dma.nr_pages;i++) {
 238                 to_addr[i].sg=&vb->dma.sglist[i];
 239                 to_addr[i].pos=pos;
 240                 pos += vb->dma.sglist[i].length;
 241         }
 242 }
 243
 244 static int get_addr_pos(int pos, int pages, struct sg_to_addr to_addr[])
 245 {
 246         int p1=0,p2=pages-1,p3=pages/2;
 247
 248         /* Sanity test */
 249         BUG_ON (pos>=to_addr[p2].pos+to_addr[p2].sg->length);
 250
 251         while (p1+1<p2) {
 252                 if (pos < to_addr[p3].pos) {
 253                         p2=p3;
 254                 } else {
 255                         p1=p3;
 256                 }
 257                 p3=(p1+p2)/2;
 258         }
 259         if (pos >= to_addr[p2].pos)
 260                 p1=p2;
 261
 262         return (p1);
 263 }
 264
 265 static void gen_line(struct sg_to_addr to_addr[],int inipos,int pages,int wmax,
 266                      int hmax, int line, char *timestr)
 267 {
 268         int  w,i,j,pos=inipos,pgpos,oldpg,y;
 269         char *p,*s,*basep;
 270         struct page *pg;
 271         u8   chr,r,g,b,color;
 272
 273         /* Get first addr pointed to pixel position */
 274         oldpg=get_addr_pos(pos,pages,to_addr);
 275         pg=pfn_to_page(to_addr[oldpg].sg->dma_address >> PAGE_SHIFT);
 276         basep = kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[oldpg].sg->offset;
 277
 278         /* We will just duplicate the second pixel at the packet */
 279         wmax/=2;
 280
 281         /* Generate a standard color bar pattern */
 282         for (w=0;w<wmax;w++) {
 283                 r=bars[w*7/wmax][0];
 284                 g=bars[w*7/wmax][1];
 285                 b=bars[w*7/wmax][2];
 286
 287                 for (color=0;color<4;color++) {
 288                         pgpos=get_addr_pos(pos,pages,to_addr);
 289                         if (pgpos!=oldpg) {
 290                                 pg=pfn_to_page(to_addr[pgpos].sg->dma_address >> PAGE_SHIFT);
 291                                 kunmap_atomic(basep, KM_BOUNCE_READ);
 292                                 basep= kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[pgpos].sg->offset;
 293                                 oldpg=pgpos;
 294                         }
 295                         p=basep+pos-to_addr[pgpos].pos;
 296
 297                         switch (color) {
 298                                 case 0:
 299                                 case 2:
 300                                         *p=TO_Y(r,g,b);         /* Luminance */
 301                                         break;
 302                                 case 1:
 303                                         *p=TO_U(r,g,b);         /* Cb */
 304                                         break;
 305                                 case 3:
 306                                         *p=TO_V(r,g,b);         /* Cr */
 307                                         break;
 308                         }
 309                         pos++;
 310                 }
 311         }
 312
 313         /* Checks if it is possible to show timestamp */
 314         if (TSTAMP_MAX_Y>=hmax)
 315                 goto end;
 316         if (TSTAMP_MIN_X+strlen(timestr)>=wmax)
 317                 goto end;
 318
 319         /* Print stream time */
 320         if (line>=TSTAMP_MIN_Y && line<=TSTAMP_MAX_Y) {
 321                 j=TSTAMP_MIN_X;
 322                 for (s=timestr;*s;s++) {
 323                         chr=rom8x16_bits[(*s-0x30)*16+line-TSTAMP_MIN_Y];
 324                         for (i=0;i<7;i++) {
 325                                 if (chr&1<<(7-i)) { /* Font color*/
 326                                         r=bars[BLUE][0];
 327                                         g=bars[BLUE][1];
 328                                         b=bars[BLUE][2];
 329                                         r=g=b=0;
 330                                         g=198;
 331                                 } else { /* Background color */
 332                                         r=bars[WHITE][0];
 333                                         g=bars[WHITE][1];
 334                                         b=bars[WHITE][2];
 335                                         r=g=b=0;
 336                                 }
 337
 338                                 pos=inipos+j*2;
 339                                 for (color=0;color<4;color++) {
 340                                         pgpos=get_addr_pos(pos,pages,to_addr);
 341                                         if (pgpos!=oldpg) {
 342                                                 pg=pfn_to_page(to_addr[pgpos].
 343                                                                 sg->dma_address
 344                                                                 >> PAGE_SHIFT);
 345                                                 kunmap_atomic(basep,
 346                                                                 KM_BOUNCE_READ);
 347                                                 basep= kmap_atomic(pg,
 348                                                         KM_BOUNCE_READ)+
 349                                                         to_addr[pgpos].sg->offset;
 350                                                 oldpg=pgpos;
 351                                         }
 352                                         p=basep+pos-to_addr[pgpos].pos;
 353
 354                                         y=TO_Y(r,g,b);
 355
 356                                         switch (color) {
 357                                                 case 0:
 358                                                 case 2:
 359                                                         *p=TO_Y(r,g,b);         /* Luminance */
 360                                                         break;
 361                                                 case 1:
 362                                                         *p=TO_U(r,g,b);         /* Cb */
 363                                                         break;
 364                                                 case 3:
 365                                                         *p=TO_V(r,g,b);         /* Cr */
 366                                                         break;
 367                                         }
 368                                         pos++;
 369                                 }
 370                                 j++;
 371                         }
 372                 }
 373         }
 374
 375
 376 end:
 377         kunmap_atomic(basep, KM_BOUNCE_READ);
 378 }
 379 static void vivi_fillbuff(struct vivi_dev *dev,struct vivi_buffer *buf)
 380 {
 381         int h,pos=0;
 382         int hmax  = buf->vb.height;
 383         int wmax  = buf->vb.width;
 384         struct videobuf_buffer *vb=&buf->vb;
 385         struct sg_to_addr *to_addr=buf->to_addr;
 386         struct timeval ts;
 387
 388         /* Test if DMA mapping is ready */
 389         if (!vb->dma.sglist[0].dma_address)
 390                 return;
 391
 392         prep_to_addr(to_addr,vb);
 393
 394         /* Check if there is enough memory */
 395         BUG_ON(buf->vb.dma.nr_pages << PAGE_SHIFT < (buf->vb.width*buf->vb.height)*2);
 396
 397         for (h=0;h<hmax;h++) {
 398                 gen_line(to_addr,pos,vb->dma.nr_pages,wmax,hmax,h,dev->timestr);
 399                 pos += wmax*2;
 400         }
 401
 402         /* Updates stream time */
 403
 404         dev->us+=jiffies_to_usecs(jiffies-dev->jiffies);
 405         dev->jiffies=jiffies;
 406         if (dev->us>=1000000) {
 407                 dev->us-=1000000;
 408                 dev->s++;
 409                 if (dev->s>=60) {
 410                         dev->s-=60;
 411                         dev->m++;
 412                         if (dev->m>60) {
 413                                 dev->m-=60;
 414                                 dev->h++;
 415                                 if (dev->h>24)
 416                                         dev->h-=24;
 417                         }
 418                 }
 419         }
 420         sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
 421                         dev->h,dev->m,dev->s,(dev->us+500)/1000);
 422
 423         dprintk(2,"vivifill at %s: Buffer 0x%08lx size= %d\n",dev->timestr,
 424                         (unsigned long)buf->vb.dma.vmalloc,pos);
 425
 426         /* Advice that buffer was filled */
 427         buf->vb.state = STATE_DONE;
 428         buf->vb.field_count++;
 429         do_gettimeofday(&ts);
 430         buf->vb.ts = ts;
 431
 432         list_del(&buf->vb.queue);
 433         wake_up(&buf->vb.done);
 434 }
 435
 436 static int restart_video_queue(struct vivi_dmaqueue *dma_q);
 437
 438 static void vivi_thread_tick(struct vivi_dmaqueue  *dma_q)
 439 {
 440         struct vivi_buffer    *buf;
 441         struct vivi_dev *dev= container_of(dma_q,struct vivi_dev,vidq);
 442
 443         int bc;
 444
 445         /* Announces videobuf that all went ok */
 446         for (bc = 0;; bc++) {
 447                 if (list_empty(&dma_q->active)) {
 448                         dprintk(1,"No active queue to serve\n");
 449                         break;
 450                 }
 451
 452                 buf = list_entry(dma_q->active.next,
 453                                  struct vivi_buffer, vb.queue);
 454
 455                 /* Nobody is waiting something to be done, just return */
 456                 if (!waitqueue_active(&buf->vb.done)) {
 457                         mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 458                         return;
 459                 }
 460
 461                 do_gettimeofday(&buf->vb.ts);
 462                 dprintk(2,"[%p/%d] wakeup\n",buf,buf->vb.i);
 463
 464                 /* Fill buffer */
 465                 vivi_fillbuff(dev,buf);
 466         }
 467         if (list_empty(&dma_q->active)) {
 468                 del_timer(&dma_q->timeout);
 469         } else {
 470                 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 471         }
 472         if (bc != 1)
 473                 dprintk(1,"%s: %d buffers handled (should be 1)\n",__FUNCTION__,bc);
 474 }
 475
 476 static void vivi_sleep(struct vivi_dmaqueue  *dma_q)
 477 {
 478         int timeout;
 479         DECLARE_WAITQUEUE(wait, current);
 480
 481         dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
 482
 483         add_wait_queue(&dma_q->wq, &wait);
 484         if (!kthread_should_stop()) {
 485                 dma_q->frame++;
 486
 487                 /* Calculate time to wake up */
 488                 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
 489
 490                 if (timeout <= 0) {
 491                         int old=dma_q->frame;
 492                         dma_q->frame=(jiffies_to_msecs(jiffies-dma_q->ini_jiffies)*WAKE_DENOMINATOR)/(WAKE_NUMERATOR*1000)+1;
 493
 494                         timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
 495
 496                         dprintk(1,"underrun, losed %d frames. "
 497                                   "Now, frame is %d. Waking on %d jiffies\n",
 498                                         dma_q->frame-old,dma_q->frame,timeout);
 499                 } else
 500                         dprintk(1,"will sleep for %i jiffies\n",timeout);
 501
 502                 vivi_thread_tick(dma_q);
 503
 504                 schedule_timeout_interruptible (timeout);
 505         }
 506
 507         remove_wait_queue(&dma_q->wq, &wait);
 508         try_to_freeze();
 509 }
 510
 511 static int vivi_thread(void *data)
 512 {
 513         struct vivi_dmaqueue  *dma_q=data;
 514
 515         dprintk(1,"thread started\n");
 516
 517         for (;;) {
 518                 vivi_sleep(dma_q);
 519
 520                 if (kthread_should_stop())
 521                         break;
 522         }
 523         dprintk(1, "thread: exit\n");
 524         return 0;
 525 }
 526
 527 static int vivi_start_thread(struct vivi_dmaqueue  *dma_q)
 528 {
 529         dma_q->frame=0;
 530         dma_q->ini_jiffies=jiffies;
 531
 532         dprintk(1,"%s\n",__FUNCTION__);
 533         init_waitqueue_head(&dma_q->wq);
 534
 535         dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi");
 536
 537         if (dma_q->kthread == NULL) {
 538                 printk(KERN_ERR "vivi: kernel_thread() failed\n");
 539                 return -EINVAL;
 540         }
 541         dprintk(1,"returning from %s\n",__FUNCTION__);
 542         return 0;
 543 }
 544
 545 static void vivi_stop_thread(struct vivi_dmaqueue  *dma_q)
 546 {
 547         dprintk(1,"%s\n",__FUNCTION__);
 548         /* shutdown control thread */
 549         if (dma_q->kthread) {
 550                 kthread_stop(dma_q->kthread);
 551                 dma_q->kthread=NULL;
 552         }
 553 }
 554
 555 static int restart_video_queue(struct vivi_dmaqueue *dma_q)
 556 {
 557         struct vivi_buffer *buf, *prev;
 558         struct list_head *item;
 559
 560         dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
 561
 562         if (!list_empty(&dma_q->active)) {
 563                 buf = list_entry(dma_q->active.next, struct vivi_buffer, vb.queue);
 564                 dprintk(2,"restart_queue [%p/%d]: restart dma\n",
 565                         buf, buf->vb.i);
 566
 567                 dprintk(1,"Restarting video dma\n");
 568                 vivi_stop_thread(dma_q);
 569 //              vivi_start_thread(dma_q);
 570
 571                 /* cancel all outstanding capture / vbi requests */
 572                 list_for_each(item,&dma_q->active) {
 573                         buf = list_entry(item, struct vivi_buffer, vb.queue);
 574
 575                         list_del(&buf->vb.queue);
 576                         buf->vb.state = STATE_ERROR;
 577                         wake_up(&buf->vb.done);
 578                 }
 579                 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 580
 581                 return 0;
 582         }
 583
 584         prev = NULL;
 585         for (;;) {
 586                 if (list_empty(&dma_q->queued))
 587                         return 0;
 588                 buf = list_entry(dma_q->queued.next, struct vivi_buffer, vb.queue);
 589                 if (NULL == prev) {
 590                         list_del(&buf->vb.queue);
 591                         list_add_tail(&buf->vb.queue,&dma_q->active);
 592
 593                         dprintk(1,"Restarting video dma\n");
 594                         vivi_stop_thread(dma_q);
 595                         vivi_start_thread(dma_q);
 596
 597                         buf->vb.state = STATE_ACTIVE;
 598                         mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 599                         dprintk(2,"[%p/%d] restart_queue - first active\n",
 600                                 buf,buf->vb.i);
 601
 602                 } else if (prev->vb.width  == buf->vb.width  &&
 603                            prev->vb.height == buf->vb.height &&
 604                            prev->fmt       == buf->fmt) {
 605                         list_del(&buf->vb.queue);
 606                         list_add_tail(&buf->vb.queue,&dma_q->active);
 607                         buf->vb.state = STATE_ACTIVE;
 608                         dprintk(2,"[%p/%d] restart_queue - move to active\n",
 609                                 buf,buf->vb.i);
 610                 } else {
 611                         return 0;
 612                 }
 613                 prev = buf;
 614         }
 615 }
 616
 617 static void vivi_vid_timeout(unsigned long data)
 618 {
 619         struct vivi_dev      *dev  = (struct vivi_dev*)data;
 620         struct vivi_dmaqueue *vidq = &dev->vidq;
 621         struct vivi_buffer   *buf;
 622
 623         while (!list_empty(&vidq->active)) {
 624                 buf = list_entry(vidq->active.next, struct vivi_buffer, vb.queue);
 625                 list_del(&buf->vb.queue);
 626                 buf->vb.state = STATE_ERROR;
 627                 wake_up(&buf->vb.done);
 628                 printk("vivi/0: [%p/%d] timeout\n", buf, buf->vb.i);
 629         }
 630
 631         restart_video_queue(vidq);
 632 }
 633
 634 /* ------------------------------------------------------------------
 635         Videobuf operations
 636    ------------------------------------------------------------------*/
 637 static int
 638 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 639 {
 640         struct vivi_fh *fh = vq->priv_data;
 641
 642         *size = fh->width*fh->height*2;
 643
 644         if (0 == *count)
 645                 *count = 32;
 646         while (*size * *count > vid_limit * 1024 * 1024)
 647                 (*count)--;
 648         return 0;
 649 }
 650
 651 static void free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
 652 {
 653         dprintk(1,"%s\n",__FUNCTION__);
 654
 655         if (in_interrupt())
 656                 BUG();
 657
 658         /*FIXME: Maybe a spinlock is required here */
 659         kfree(buf->to_addr);
 660         buf->to_addr=NULL;
 661
 662         videobuf_waiton(&buf->vb,0,0);
 663         videobuf_dma_unmap(vq, &buf->vb.dma);
 664         videobuf_dma_free(&buf->vb.dma);
 665         buf->vb.state = STATE_NEEDS_INIT;
 666 }
 667
 668 #define norm_maxw() 1024
 669 #define norm_maxh() 768
 670 static int
 671 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 672                                                 enum v4l2_field field)
 673 {
 674         struct vivi_fh     *fh  = vq->priv_data;
 675         struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
 676         int rc, init_buffer = 0;
 677
 678 //      dprintk(1,"%s, field=%d\n",__FUNCTION__,field);
 679
 680         BUG_ON(NULL == fh->fmt);
 681         if (fh->width  < 48 || fh->width  > norm_maxw() ||
 682             fh->height < 32 || fh->height > norm_maxh())
 683                 return -EINVAL;
 684         buf->vb.size = fh->width*fh->height*2;
 685         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
 686                 return -EINVAL;
 687
 688         if (buf->fmt       != fh->fmt    ||
 689             buf->vb.width  != fh->width  ||
 690             buf->vb.height != fh->height ||
 691         buf->vb.field  != field) {
 692                 buf->fmt       = fh->fmt;
 693                 buf->vb.width  = fh->width;
 694                 buf->vb.height = fh->height;
 695                 buf->vb.field  = field;
 696                 init_buffer = 1;
 697         }
 698
 699         if (STATE_NEEDS_INIT == buf->vb.state) {
 700                 if (0 != (rc = videobuf_iolock(vq,&buf->vb,NULL)))
 701                         goto fail;
 702         }
 703
 704         buf->vb.state = STATE_PREPARED;
 705
 706         if (NULL == (buf->to_addr = kmalloc(sizeof(*buf->to_addr) * vb->dma.nr_pages,GFP_KERNEL))) {
 707                 rc=-ENOMEM;
 708                 goto fail;
 709         }
 710
 711         return 0;
 712
 713 fail:
 714         free_buffer(vq,buf);
 715         return rc;
 716 }
 717
 718 static void
 719 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 720 {
 721         struct vivi_buffer    *buf     = container_of(vb,struct vivi_buffer,vb);
 722         struct vivi_fh        *fh      = vq->priv_data;
 723         struct vivi_dev       *dev     = fh->dev;
 724         struct vivi_dmaqueue  *vidq    = &dev->vidq;
 725         struct vivi_buffer    *prev;
 726
 727         if (!list_empty(&vidq->queued)) {
 728                 dprintk(1,"adding vb queue=0x%08lx\n",(unsigned long)&buf->vb.queue);
 729                 list_add_tail(&buf->vb.queue,&vidq->queued);
 730                 buf->vb.state = STATE_QUEUED;
 731                 dprintk(2,"[%p/%d] buffer_queue - append to queued\n",
 732                         buf, buf->vb.i);
 733         } else if (list_empty(&vidq->active)) {
 734                 list_add_tail(&buf->vb.queue,&vidq->active);
 735
 736                 buf->vb.state = STATE_ACTIVE;
 737                 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
 738                 dprintk(2,"[%p/%d] buffer_queue - first active\n",
 739                         buf, buf->vb.i);
 740
 741                 vivi_start_thread(vidq);
 742         } else {
 743                 prev = list_entry(vidq->active.prev, struct vivi_buffer, vb.queue);
 744                 if (prev->vb.width  == buf->vb.width  &&
 745                     prev->vb.height == buf->vb.height &&
 746                     prev->fmt       == buf->fmt) {
 747                         list_add_tail(&buf->vb.queue,&vidq->active);
 748                         buf->vb.state = STATE_ACTIVE;
 749                         dprintk(2,"[%p/%d] buffer_queue - append to active\n",
 750                                 buf, buf->vb.i);
 751
 752                 } else {
 753                         list_add_tail(&buf->vb.queue,&vidq->queued);
 754                         buf->vb.state = STATE_QUEUED;
 755                         dprintk(2,"[%p/%d] buffer_queue - first queued\n",
 756                                 buf, buf->vb.i);
 757                 }
 758         }
 759 }
 760
 761 static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 762 {
 763         struct vivi_buffer   *buf  = container_of(vb,struct vivi_buffer,vb);
 764         struct vivi_fh       *fh   = vq->priv_data;
 765         struct vivi_dev      *dev  = (struct vivi_dev*)fh->dev;
 766         struct vivi_dmaqueue *vidq = &dev->vidq;
 767
 768         dprintk(1,"%s\n",__FUNCTION__);
 769
 770         vivi_stop_thread(vidq);
 771
 772         free_buffer(vq,buf);
 773 }
 774
 775 static int vivi_map_sg(void *dev, struct scatterlist *sg, int nents,
 776                        int direction)
 777 {
 778         int i;
 779
 780         dprintk(1,"%s, number of pages=%d\n",__FUNCTION__,nents);
 781         BUG_ON(direction == DMA_NONE);
 782
 783         for (i = 0; i < nents; i++ ) {
 784                 BUG_ON(!sg[i].page);
 785
 786                 sg[i].dma_address = page_to_phys(sg[i].page) + sg[i].offset;
 787         }
 788
 789         return nents;
 790 }
 791
 792 static int vivi_unmap_sg(void *dev,struct scatterlist *sglist,int nr_pages,
 793                          int direction)
 794 {
 795         dprintk(1,"%s\n",__FUNCTION__);
 796         return 0;
 797 }
 798
 799 static int vivi_dma_sync_sg(void *dev,struct scatterlist *sglist, int nr_pages,
 800                             int direction)
 801 {
 802 //      dprintk(1,"%s\n",__FUNCTION__);
 803
 804 //      flush_write_buffers();
 805         return 0;
 806 }
 807
 808 static struct videobuf_queue_ops vivi_video_qops = {
 809         .buf_setup      = buffer_setup,
 810         .buf_prepare    = buffer_prepare,
 811         .buf_queue      = buffer_queue,
 812         .buf_release    = buffer_release,
 813
 814         /* Non-pci handling routines */
 815         .vb_map_sg      = vivi_map_sg,
 816         .vb_dma_sync_sg = vivi_dma_sync_sg,
 817         .vb_unmap_sg    = vivi_unmap_sg,
 818 };
 819
 820 /* ------------------------------------------------------------------
 821         IOCTL handling
 822    ------------------------------------------------------------------*/
 823
 824
 825 static int res_get(struct vivi_dev *dev, struct vivi_fh *fh)
 826 {
 827         /* is it free? */
 828         down(&dev->lock);
 829         if (dev->resources) {
 830                 /* no, someone else uses it */
 831                 up(&dev->lock);
 832                 return 0;
 833         }
 834         /* it's free, grab it */
 835         dev->resources =1;
 836         dprintk(1,"res: get\n");
 837         up(&dev->lock);
 838         return 1;
 839 }
 840
 841 static int res_locked(struct vivi_dev *dev)
 842 {
 843         return (dev->resources);
 844 }
 845
 846 static void res_free(struct vivi_dev *dev, struct vivi_fh *fh)
 847 {
 848         down(&dev->lock);
 849         dev->resources = 0;
 850         dprintk(1,"res: put\n");
 851         up(&dev->lock);
 852 }
 853
 854 /* ------------------------------------------------------------------
 855         IOCTL vidioc handling
 856    ------------------------------------------------------------------*/
 857 static int vidioc_querycap (struct file *file, void  *priv,
 858                                         struct v4l2_capability *cap)
 859 {
 860         strcpy(cap->driver, "vivi");
 861         strcpy(cap->card, "vivi");
 862         cap->version = VIVI_VERSION;
 863         cap->capabilities =     V4L2_CAP_VIDEO_CAPTURE |
 864                                 V4L2_CAP_STREAMING     |
 865                                 V4L2_CAP_READWRITE;
 866         return 0;
 867 }
 868
 869 static int vidioc_enum_fmt_cap (struct file *file, void  *priv,
 870                                         struct v4l2_fmtdesc *f)
 871 {
 872         if (f->index > 0)
 873                 return -EINVAL;
 874
 875         strlcpy(f->description,format.name,sizeof(f->description));
 876         f->pixelformat = format.fourcc;
 877         return 0;
 878 }
 879
 880 static int vidioc_g_fmt_cap (struct file *file, void *priv,
 881                                         struct v4l2_format *f)
 882 {
 883         struct vivi_fh  *fh=priv;
 884
 885         f->fmt.pix.width        = fh->width;
 886         f->fmt.pix.height       = fh->height;
 887         f->fmt.pix.field        = fh->vb_vidq.field;
 888         f->fmt.pix.pixelformat  = fh->fmt->fourcc;
 889         f->fmt.pix.bytesperline =
 890                 (f->fmt.pix.width * fh->fmt->depth) >> 3;
 891         f->fmt.pix.sizeimage =
 892                 f->fmt.pix.height * f->fmt.pix.bytesperline;
 893
 894         return (0);
 895 }
 896
 897 static int vidioc_try_fmt_cap (struct file *file, void *priv,
 898                         struct v4l2_format *f)
 899 {
 900         struct vivi_fmt *fmt;
 901         enum v4l2_field field;
 902         unsigned int maxw, maxh;
 903
 904         if (format.fourcc != f->fmt.pix.pixelformat) {
 905                 dprintk(1,"Fourcc format (0x%08x) invalid. Driver accepts "
 906                         "only 0x%08x\n",f->fmt.pix.pixelformat,format.fourcc);
 907                 return -EINVAL;
 908         }
 909         fmt=&format;
 910
 911         field = f->fmt.pix.field;
 912
 913         if (field == V4L2_FIELD_ANY) {
 914 //              field=V4L2_FIELD_INTERLACED;
 915                 field=V4L2_FIELD_SEQ_TB;
 916         } else if (V4L2_FIELD_INTERLACED != field) {
 917                 dprintk(1,"Field type invalid.\n");
 918                 return -EINVAL;
 919         }
 920
 921         maxw  = norm_maxw();
 922         maxh  = norm_maxh();
 923
 924         f->fmt.pix.field = field;
 925         if (f->fmt.pix.height < 32)
 926                 f->fmt.pix.height = 32;
 927         if (f->fmt.pix.height > maxh)
 928                 f->fmt.pix.height = maxh;
 929         if (f->fmt.pix.width < 48)
 930                 f->fmt.pix.width = 48;
 931         if (f->fmt.pix.width > maxw)
 932                 f->fmt.pix.width = maxw;
 933         f->fmt.pix.width &= ~0x03;
 934         f->fmt.pix.bytesperline =
 935                 (f->fmt.pix.width * fmt->depth) >> 3;
 936         f->fmt.pix.sizeimage =
 937                 f->fmt.pix.height * f->fmt.pix.bytesperline;
 938
 939         return 0;
 940 }
 941
 942 /*FIXME: This seems to be generic enough to be at videodev2 */
 943 static int vidioc_s_fmt_cap (struct file *file, void *priv,
 944                                         struct v4l2_format *f)
 945 {
 946         struct vivi_fh  *fh=priv;
 947         int ret = vidioc_try_fmt_cap(file,fh,f);
 948         if (ret < 0)
 949                 return (ret);
 950
 951         fh->fmt           = &format;
 952         fh->width         = f->fmt.pix.width;
 953         fh->height        = f->fmt.pix.height;
 954         fh->vb_vidq.field = f->fmt.pix.field;
 955         fh->type          = f->type;
 956
 957         return (0);
 958 }
 959
 960 static int vidioc_reqbufs (struct file *file, void *priv, struct v4l2_requestbuffers *p)
 961 {
 962         struct vivi_fh  *fh=priv;
 963
 964         return (videobuf_reqbufs(&fh->vb_vidq, p));
 965 }
 966
 967 static int vidioc_querybuf (struct file *file, void *priv, struct v4l2_buffer *p)
 968 {
 969         struct vivi_fh  *fh=priv;
 970
 971         return (videobuf_querybuf(&fh->vb_vidq, p));
 972 }
 973
 974 static int vidioc_qbuf (struct file *file, void *priv, struct v4l2_buffer *p)
 975 {
 976         struct vivi_fh  *fh=priv;
 977
 978         return (videobuf_qbuf(&fh->vb_vidq, p));
 979 }
 980
 981 static int vidioc_dqbuf (struct file *file, void *priv, struct v4l2_buffer *p)
 982 {
 983         struct vivi_fh  *fh=priv;
 984
 985         return (videobuf_dqbuf(&fh->vb_vidq, p,
 986                                 file->f_flags & O_NONBLOCK));
 987 }
 988
 989 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 990 static int vidiocgmbuf (struct file *file, void *priv, struct video_mbuf *mbuf)
 991 {
 992         struct vivi_fh  *fh=priv;
 993         struct videobuf_queue *q=&fh->vb_vidq;
 994         struct v4l2_requestbuffers req;
 995         unsigned int i;
 996         int ret;
 997
 998         req.type   = q->type;
 999         req.count  = 8;
1000         req.memory = V4L2_MEMORY_MMAP;
1001         ret = videobuf_reqbufs(q,&req);
1002         if (ret < 0)
1003                 return (ret);
1004
1005         mbuf->frames = req.count;
1006         mbuf->size   = 0;
1007         for (i = 0; i < mbuf->frames; i++) {
1008                 mbuf->offsets[i]  = q->bufs[i]->boff;
1009                 mbuf->size       += q->bufs[i]->bsize;
1010         }
1011         return (0);
1012 }
1013 #endif
1014
1015 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
1016 {
1017         struct vivi_fh  *fh=priv;
1018         struct vivi_dev *dev    = fh->dev;
1019
1020         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1021                 return -EINVAL;
1022         if (i != fh->type)
1023                 return -EINVAL;
1024
1025         if (!res_get(dev,fh))
1026                 return -EBUSY;
1027         return (videobuf_streamon(&fh->vb_vidq));
1028 }
1029
1030 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
1031 {
1032         struct vivi_fh  *fh=priv;
1033         struct vivi_dev *dev    = fh->dev;
1034
1035         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1036                 return -EINVAL;
1037         if (i != fh->type)
1038                 return -EINVAL;
1039
1040         videobuf_streamoff(&fh->vb_vidq);
1041         res_free(dev,fh);
1042
1043         return (0);
1044 }
1045
1046 static struct v4l2_tvnorm tvnorms[] = {
1047         {
1048                 .name      = "NTSC-M",
1049                 .id        = V4L2_STD_NTSC_M,
1050         }
1051 };
1052
1053 static int vidioc_s_std (struct file *file, void *priv, v4l2_std_id a)
1054 {
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 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              = tvnorms,
1336         .tvnormsize           = ARRAY_SIZE(tvnorms),
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         list_for_each(list,&vivi_devlist) {
1374                 h = list_entry(list, struct vivi_dev, vivi_devlist);
1375                 kfree (h);
1376         }
1377         video_unregister_device(&vivi);
1378 }
1379
1380 module_init(vivi_init);
1381 module_exit(vivi_exit);
1382
1383 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
1384 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
1385 MODULE_LICENSE("Dual BSD/GPL");
1386
1387 module_param(video_nr, int, 0);
1388
1389 module_param_named(debug,vivi.debug, int, 0644);
1390 MODULE_PARM_DESC(debug,"activates debug info");
1391
1392 module_param(vid_limit,int,0644);
1393 MODULE_PARM_DESC(vid_limit,"capture memory limit in megabytes");
1394