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 #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
 274         /* Get first addr pointed to pixel position */
 275         oldpg=get_addr_pos(pos,pages,to_addr);
 276         pg=pfn_to_page(sg_dma_address(to_addr[oldpg].sg) >> PAGE_SHIFT);
 277         basep = kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[oldpg].sg->offset;
 278
 279         /* We will just duplicate the second pixel at the packet */
 280         wmax/=2;
 281
 282         /* Generate a standard color bar pattern */
 283         for (w=0;w<wmax;w++) {
 284                 r=bars[w*7/wmax][0];
 285                 g=bars[w*7/wmax][1];
 286                 b=bars[w*7/wmax][2];
 287
 288                 for (color=0;color<4;color++) {
 289                         pgpos=get_addr_pos(pos,pages,to_addr);
 290                         if (pgpos!=oldpg) {
 291                                 pg=pfn_to_page(sg_dma_address(to_addr[pgpos].sg) >> PAGE_SHIFT);
 292                                 kunmap_atomic(basep, KM_BOUNCE_READ);
 293                                 basep= kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[pgpos].sg->offset;
 294                                 oldpg=pgpos;
 295                         }
 296                         p=basep+pos-to_addr[pgpos].pos;
 297
 298                         switch (color) {
 299                                 case 0:
 300                                 case 2:
 301                                         *p=TO_Y(r,g,b);         /* Luminance */
 302                                         break;
 303                                 case 1:
 304                                         *p=TO_U(r,g,b);         /* Cb */
 305                                         break;
 306                                 case 3:
 307                                         *p=TO_V(r,g,b);         /* Cr */
 308                                         break;
 309                         }
 310                         pos++;
 311                 }
 312         }
 313
 314         /* Checks if it is possible to show timestamp */
 315         if (TSTAMP_MAX_Y>=hmax)
 316                 goto end;
 317         if (TSTAMP_MIN_X+strlen(timestr)>=wmax)
 318                 goto end;
 319
 320         /* Print stream time */
 321         if (line>=TSTAMP_MIN_Y && line<=TSTAMP_MAX_Y) {
 322                 j=TSTAMP_MIN_X;
 323                 for (s=timestr;*s;s++) {
 324                         chr=rom8x16_bits[(*s-0x30)*16+line-TSTAMP_MIN_Y];
 325                         for (i=0;i<7;i++) {
 326                                 if (chr&1<<(7-i)) { /* Font color*/
 327                                         r=bars[BLUE][0];
 328                                         g=bars[BLUE][1];
 329                                         b=bars[BLUE][2];
 330                                         r=g=b=0;
 331                                         g=198;
 332                                 } else { /* Background color */
 333                                         r=bars[WHITE][0];
 334                                         g=bars[WHITE][1];
 335                                         b=bars[WHITE][2];
 336                                         r=g=b=0;
 337                                 }
 338
 339                                 pos=inipos+j*2;
 340                                 for (color=0;color<4;color++) {
 341                                         pgpos=get_addr_pos(pos,pages,to_addr);
 342                                         if (pgpos!=oldpg) {
 343                                                 pg=pfn_to_page(sg_dma_address(
 344                                                                 to_addr[pgpos].sg)
 345                                                                 >> PAGE_SHIFT);
 346                                                 kunmap_atomic(basep,
 347                                                                 KM_BOUNCE_READ);
 348                                                 basep= kmap_atomic(pg,
 349                                                         KM_BOUNCE_READ)+
 350                                                         to_addr[pgpos].sg->offset;
 351                                                 oldpg=pgpos;
 352                                         }
 353                                         p=basep+pos-to_addr[pgpos].pos;
 354
 355                                         y=TO_Y(r,g,b);
 356
 357                                         switch (color) {
 358                                                 case 0:
 359                                                 case 2:
 360                                                         *p=TO_Y(r,g,b);         /* Luminance */
 361                                                         break;
 362                                                 case 1:
 363                                                         *p=TO_U(r,g,b);         /* Cb */
 364                                                         break;
 365                                                 case 3:
 366                                                         *p=TO_V(r,g,b);         /* Cr */
 367                                                         break;
 368                                         }
 369                                         pos++;
 370                                 }
 371                                 j++;
 372                         }
 373                 }
 374         }
 375
 376
 377 end:
 378         kunmap_atomic(basep, KM_BOUNCE_READ);
 379 }
 380 static void vivi_fillbuff(struct vivi_dev *dev,struct vivi_buffer *buf)
 381 {
 382         int h,pos=0;
 383         int hmax  = buf->vb.height;
 384         int wmax  = buf->vb.width;
 385         struct videobuf_buffer *vb=&buf->vb;
 386         struct sg_to_addr *to_addr=buf->to_addr;
 387         struct timeval ts;
 388
 389         /* Test if DMA mapping is ready */
 390         if (!sg_dma_address(&vb->dma.sglist[0]))
 391                 return;
 392
 393         prep_to_addr(to_addr,vb);
 394
 395         /* Check if there is enough memory */
 396         BUG_ON(buf->vb.dma.nr_pages << PAGE_SHIFT < (buf->vb.width*buf->vb.height)*2);
 397
 398         for (h=0;h<hmax;h++) {
 399                 gen_line(to_addr,pos,vb->dma.nr_pages,wmax,hmax,h,dev->timestr);
 400                 pos += wmax*2;
 401         }
 402
 403         /* Updates stream time */
 404
 405         dev->us+=jiffies_to_usecs(jiffies-dev->jiffies);
 406         dev->jiffies=jiffies;
 407         if (dev->us>=1000000) {
 408                 dev->us-=1000000;
 409                 dev->s++;
 410                 if (dev->s>=60) {
 411                         dev->s-=60;
 412                         dev->m++;
 413                         if (dev->m>60) {
 414                                 dev->m-=60;
 415                                 dev->h++;
 416                                 if (dev->h>24)
 417                                         dev->h-=24;
 418                         }
 419                 }
 420         }
 421         sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
 422                         dev->h,dev->m,dev->s,(dev->us+500)/1000);
 423
 424         dprintk(2,"vivifill at %s: Buffer 0x%08lx size= %d\n",dev->timestr,
 425                         (unsigned long)buf->vb.dma.vmalloc,pos);
 426
 427         /* Advice that buffer was filled */
 428         buf->vb.state = STATE_DONE;
 429         buf->vb.field_count++;
 430         do_gettimeofday(&ts);
 431         buf->vb.ts = ts;
 432
 433         list_del(&buf->vb.queue);
 434         wake_up(&buf->vb.done);
 435 }
 436
 437 static int restart_video_queue(struct vivi_dmaqueue *dma_q);
 438
 439 static void vivi_thread_tick(struct vivi_dmaqueue  *dma_q)
 440 {
 441         struct vivi_buffer    *buf;
 442         struct vivi_dev *dev= container_of(dma_q,struct vivi_dev,vidq);
 443
 444         int bc;
 445
 446         /* Announces videobuf that all went ok */
 447         for (bc = 0;; bc++) {
 448                 if (list_empty(&dma_q->active)) {
 449                         dprintk(1,"No active queue to serve\n");
 450                         break;
 451                 }
 452
 453                 buf = list_entry(dma_q->active.next,
 454                                  struct vivi_buffer, vb.queue);
 455
 456                 /* Nobody is waiting something to be done, just return */
 457                 if (!waitqueue_active(&buf->vb.done)) {
 458                         mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 459                         return;
 460                 }
 461
 462                 do_gettimeofday(&buf->vb.ts);
 463                 dprintk(2,"[%p/%d] wakeup\n",buf,buf->vb.i);
 464
 465                 /* Fill buffer */
 466                 vivi_fillbuff(dev,buf);
 467         }
 468         if (list_empty(&dma_q->active)) {
 469                 del_timer(&dma_q->timeout);
 470         } else {
 471                 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 472         }
 473         if (bc != 1)
 474                 dprintk(1,"%s: %d buffers handled (should be 1)\n",__FUNCTION__,bc);
 475 }
 476
 477 static void vivi_sleep(struct vivi_dmaqueue  *dma_q)
 478 {
 479         int timeout;
 480         DECLARE_WAITQUEUE(wait, current);
 481
 482         dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
 483
 484         add_wait_queue(&dma_q->wq, &wait);
 485         if (!kthread_should_stop()) {
 486                 dma_q->frame++;
 487
 488                 /* Calculate time to wake up */
 489                 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
 490
 491                 if (timeout <= 0) {
 492                         int old=dma_q->frame;
 493                         dma_q->frame=(jiffies_to_msecs(jiffies-dma_q->ini_jiffies)*WAKE_DENOMINATOR)/(WAKE_NUMERATOR*1000)+1;
 494
 495                         timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
 496
 497                         dprintk(1,"underrun, losed %d frames. "
 498                                   "Now, frame is %d. Waking on %d jiffies\n",
 499                                         dma_q->frame-old,dma_q->frame,timeout);
 500                 } else
 501                         dprintk(1,"will sleep for %i jiffies\n",timeout);
 502
 503                 vivi_thread_tick(dma_q);
 504
 505                 schedule_timeout_interruptible (timeout);
 506         }
 507
 508         remove_wait_queue(&dma_q->wq, &wait);
 509         try_to_freeze();
 510 }
 511
 512 static int vivi_thread(void *data)
 513 {
 514         struct vivi_dmaqueue  *dma_q=data;
 515
 516         dprintk(1,"thread started\n");
 517
 518         for (;;) {
 519                 vivi_sleep(dma_q);
 520
 521                 if (kthread_should_stop())
 522                         break;
 523         }
 524         dprintk(1, "thread: exit\n");
 525         return 0;
 526 }
 527
 528 static int vivi_start_thread(struct vivi_dmaqueue  *dma_q)
 529 {
 530         dma_q->frame=0;
 531         dma_q->ini_jiffies=jiffies;
 532
 533         dprintk(1,"%s\n",__FUNCTION__);
 534         init_waitqueue_head(&dma_q->wq);
 535
 536         dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi");
 537
 538         if (dma_q->kthread == NULL) {
 539                 printk(KERN_ERR "vivi: kernel_thread() failed\n");
 540                 return -EINVAL;
 541         }
 542         dprintk(1,"returning from %s\n",__FUNCTION__);
 543         return 0;
 544 }
 545
 546 static void vivi_stop_thread(struct vivi_dmaqueue  *dma_q)
 547 {
 548         dprintk(1,"%s\n",__FUNCTION__);
 549         /* shutdown control thread */
 550         if (dma_q->kthread) {
 551                 kthread_stop(dma_q->kthread);
 552                 dma_q->kthread=NULL;
 553         }
 554 }
 555
 556 static int restart_video_queue(struct vivi_dmaqueue *dma_q)
 557 {
 558         struct vivi_buffer *buf, *prev;
 559         struct list_head *item;
 560
 561         dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
 562
 563         if (!list_empty(&dma_q->active)) {
 564                 buf = list_entry(dma_q->active.next, struct vivi_buffer, vb.queue);
 565                 dprintk(2,"restart_queue [%p/%d]: restart dma\n",
 566                         buf, buf->vb.i);
 567
 568                 dprintk(1,"Restarting video dma\n");
 569                 vivi_stop_thread(dma_q);
 570 //              vivi_start_thread(dma_q);
 571
 572                 /* cancel all outstanding capture / vbi requests */
 573                 list_for_each(item,&dma_q->active) {
 574                         buf = list_entry(item, struct vivi_buffer, vb.queue);
 575
 576                         list_del(&buf->vb.queue);
 577                         buf->vb.state = STATE_ERROR;
 578                         wake_up(&buf->vb.done);
 579                 }
 580                 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 581
 582                 return 0;
 583         }
 584
 585         prev = NULL;
 586         for (;;) {
 587                 if (list_empty(&dma_q->queued))
 588                         return 0;
 589                 buf = list_entry(dma_q->queued.next, struct vivi_buffer, vb.queue);
 590                 if (NULL == prev) {
 591                         list_del(&buf->vb.queue);
 592                         list_add_tail(&buf->vb.queue,&dma_q->active);
 593
 594                         dprintk(1,"Restarting video dma\n");
 595                         vivi_stop_thread(dma_q);
 596                         vivi_start_thread(dma_q);
 597
 598                         buf->vb.state = STATE_ACTIVE;
 599                         mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 600                         dprintk(2,"[%p/%d] restart_queue - first active\n",
 601                                 buf,buf->vb.i);
 602
 603                 } else if (prev->vb.width  == buf->vb.width  &&
 604                            prev->vb.height == buf->vb.height &&
 605                            prev->fmt       == buf->fmt) {
 606                         list_del(&buf->vb.queue);
 607                         list_add_tail(&buf->vb.queue,&dma_q->active);
 608                         buf->vb.state = STATE_ACTIVE;
 609                         dprintk(2,"[%p/%d] restart_queue - move to active\n",
 610                                 buf,buf->vb.i);
 611                 } else {
 612                         return 0;
 613                 }
 614                 prev = buf;
 615         }
 616 }
 617
 618 static void vivi_vid_timeout(unsigned long data)
 619 {
 620         struct vivi_dev      *dev  = (struct vivi_dev*)data;
 621         struct vivi_dmaqueue *vidq = &dev->vidq;
 622         struct vivi_buffer   *buf;
 623
 624         while (!list_empty(&vidq->active)) {
 625                 buf = list_entry(vidq->active.next, struct vivi_buffer, vb.queue);
 626                 list_del(&buf->vb.queue);
 627                 buf->vb.state = STATE_ERROR;
 628                 wake_up(&buf->vb.done);
 629                 printk("vivi/0: [%p/%d] timeout\n", buf, buf->vb.i);
 630         }
 631
 632         restart_video_queue(vidq);
 633 }
 634
 635 /* ------------------------------------------------------------------
 636         Videobuf operations
 637    ------------------------------------------------------------------*/
 638 static int
 639 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 640 {
 641         struct vivi_fh *fh = vq->priv_data;
 642
 643         *size = fh->width*fh->height*2;
 644
 645         if (0 == *count)
 646                 *count = 32;
 647         while (*size * *count > vid_limit * 1024 * 1024)
 648                 (*count)--;
 649         return 0;
 650 }
 651
 652 static void free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
 653 {
 654         dprintk(1,"%s\n",__FUNCTION__);
 655
 656         if (in_interrupt())
 657                 BUG();
 658
 659         /*FIXME: Maybe a spinlock is required here */
 660         kfree(buf->to_addr);
 661         buf->to_addr=NULL;
 662
 663         videobuf_waiton(&buf->vb,0,0);
 664         videobuf_dma_unmap(vq, &buf->vb.dma);
 665         videobuf_dma_free(&buf->vb.dma);
 666         buf->vb.state = STATE_NEEDS_INIT;
 667 }
 668
 669 #define norm_maxw() 1024
 670 #define norm_maxh() 768
 671 static int
 672 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 673                                                 enum v4l2_field field)
 674 {
 675         struct vivi_fh     *fh  = vq->priv_data;
 676         struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
 677         int rc, init_buffer = 0;
 678
 679 //      dprintk(1,"%s, field=%d\n",__FUNCTION__,field);
 680
 681         BUG_ON(NULL == fh->fmt);
 682         if (fh->width  < 48 || fh->width  > norm_maxw() ||
 683             fh->height < 32 || fh->height > norm_maxh())
 684                 return -EINVAL;
 685         buf->vb.size = fh->width*fh->height*2;
 686         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
 687                 return -EINVAL;
 688
 689         if (buf->fmt       != fh->fmt    ||
 690             buf->vb.width  != fh->width  ||
 691             buf->vb.height != fh->height ||
 692         buf->vb.field  != field) {
 693                 buf->fmt       = fh->fmt;
 694                 buf->vb.width  = fh->width;
 695                 buf->vb.height = fh->height;
 696                 buf->vb.field  = field;
 697                 init_buffer = 1;
 698         }
 699
 700         if (STATE_NEEDS_INIT == buf->vb.state) {
 701                 if (0 != (rc = videobuf_iolock(vq,&buf->vb,NULL)))
 702                         goto fail;
 703         }
 704
 705         buf->vb.state = STATE_PREPARED;
 706
 707         if (NULL == (buf->to_addr = kmalloc(sizeof(*buf->to_addr) * vb->dma.nr_pages,GFP_KERNEL))) {
 708                 rc=-ENOMEM;
 709                 goto fail;
 710         }
 711
 712         return 0;
 713
 714 fail:
 715         free_buffer(vq,buf);
 716         return rc;
 717 }
 718
 719 static void
 720 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 721 {
 722         struct vivi_buffer    *buf     = container_of(vb,struct vivi_buffer,vb);
 723         struct vivi_fh        *fh      = vq->priv_data;
 724         struct vivi_dev       *dev     = fh->dev;
 725         struct vivi_dmaqueue  *vidq    = &dev->vidq;
 726         struct vivi_buffer    *prev;
 727
 728         if (!list_empty(&vidq->queued)) {
 729                 dprintk(1,"adding vb queue=0x%08lx\n",(unsigned long)&buf->vb.queue);
 730                 list_add_tail(&buf->vb.queue,&vidq->queued);
 731                 buf->vb.state = STATE_QUEUED;
 732                 dprintk(2,"[%p/%d] buffer_queue - append to queued\n",
 733                         buf, buf->vb.i);
 734         } else if (list_empty(&vidq->active)) {
 735                 list_add_tail(&buf->vb.queue,&vidq->active);
 736
 737                 buf->vb.state = STATE_ACTIVE;
 738                 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
 739                 dprintk(2,"[%p/%d] buffer_queue - first active\n",
 740                         buf, buf->vb.i);
 741
 742                 vivi_start_thread(vidq);
 743         } else {
 744                 prev = list_entry(vidq->active.prev, struct vivi_buffer, vb.queue);
 745                 if (prev->vb.width  == buf->vb.width  &&
 746                     prev->vb.height == buf->vb.height &&
 747                     prev->fmt       == buf->fmt) {
 748                         list_add_tail(&buf->vb.queue,&vidq->active);
 749                         buf->vb.state = STATE_ACTIVE;
 750                         dprintk(2,"[%p/%d] buffer_queue - append to active\n",
 751                                 buf, buf->vb.i);
 752
 753                 } else {
 754                         list_add_tail(&buf->vb.queue,&vidq->queued);
 755                         buf->vb.state = STATE_QUEUED;
 756                         dprintk(2,"[%p/%d] buffer_queue - first queued\n",
 757                                 buf, buf->vb.i);
 758                 }
 759         }
 760 }
 761
 762 static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 763 {
 764         struct vivi_buffer   *buf  = container_of(vb,struct vivi_buffer,vb);
 765         struct vivi_fh       *fh   = vq->priv_data;
 766         struct vivi_dev      *dev  = (struct vivi_dev*)fh->dev;
 767         struct vivi_dmaqueue *vidq = &dev->vidq;
 768
 769         dprintk(1,"%s\n",__FUNCTION__);
 770
 771         vivi_stop_thread(vidq);
 772
 773         free_buffer(vq,buf);
 774 }
 775
 776 static int vivi_map_sg(void *dev, struct scatterlist *sg, int nents,
 777                        int direction)
 778 {
 779         int i;
 780
 781         dprintk(1,"%s, number of pages=%d\n",__FUNCTION__,nents);
 782         BUG_ON(direction == DMA_NONE);
 783
 784         for (i = 0; i < nents; i++ ) {
 785                 BUG_ON(!sg[i].page);
 786
 787                 sg_dma_address(&sg[i]) = page_to_phys(sg[i].page) + sg[i].offset;
 788         }
 789
 790         return nents;
 791 }
 792
 793 static int vivi_unmap_sg(void *dev,struct scatterlist *sglist,int nr_pages,
 794                          int direction)
 795 {
 796         dprintk(1,"%s\n",__FUNCTION__);
 797         return 0;
 798 }
 799
 800 static int vivi_dma_sync_sg(void *dev,struct scatterlist *sglist, int nr_pages,
 801                             int direction)
 802 {
 803 //      dprintk(1,"%s\n",__FUNCTION__);
 804
 805 //      flush_write_buffers();
 806         return 0;
 807 }
 808
 809 static struct videobuf_queue_ops vivi_video_qops = {
 810         .buf_setup      = buffer_setup,
 811         .buf_prepare    = buffer_prepare,
 812         .buf_queue      = buffer_queue,
 813         .buf_release    = buffer_release,
 814
 815         /* Non-pci handling routines */
 816         .vb_map_sg      = vivi_map_sg,
 817         .vb_dma_sync_sg = vivi_dma_sync_sg,
 818         .vb_unmap_sg    = vivi_unmap_sg,
 819 };
 820
 821 /* ------------------------------------------------------------------
 822         IOCTL handling
 823    ------------------------------------------------------------------*/
 824
 825
 826 static int res_get(struct vivi_dev *dev, struct vivi_fh *fh)
 827 {
 828         /* is it free? */
 829         down(&dev->lock);
 830         if (dev->resources) {
 831                 /* no, someone else uses it */
 832                 up(&dev->lock);
 833                 return 0;
 834         }
 835         /* it's free, grab it */
 836         dev->resources =1;
 837         dprintk(1,"res: get\n");
 838         up(&dev->lock);
 839         return 1;
 840 }
 841
 842 static int res_locked(struct vivi_dev *dev)
 843 {
 844         return (dev->resources);
 845 }
 846
 847 static void res_free(struct vivi_dev *dev, struct vivi_fh *fh)
 848 {
 849         down(&dev->lock);
 850         dev->resources = 0;
 851         dprintk(1,"res: put\n");
 852         up(&dev->lock);
 853 }
 854
 855 /* ------------------------------------------------------------------
 856         IOCTL vidioc handling
 857    ------------------------------------------------------------------*/
 858 static int vidioc_querycap (struct file *file, void  *priv,
 859                                         struct v4l2_capability *cap)
 860 {
 861         strcpy(cap->driver, "vivi");
 862         strcpy(cap->card, "vivi");
 863         cap->version = VIVI_VERSION;
 864         cap->capabilities =     V4L2_CAP_VIDEO_CAPTURE |
 865                                 V4L2_CAP_STREAMING     |
 866                                 V4L2_CAP_READWRITE;
 867         return 0;
 868 }
 869
 870 static int vidioc_enum_fmt_cap (struct file *file, void  *priv,
 871                                         struct v4l2_fmtdesc *f)
 872 {
 873         if (f->index > 0)
 874                 return -EINVAL;
 875
 876         strlcpy(f->description,format.name,sizeof(f->description));
 877         f->pixelformat = format.fourcc;
 878         return 0;
 879 }
 880
 881 static int vidioc_g_fmt_cap (struct file *file, void *priv,
 882                                         struct v4l2_format *f)
 883 {
 884         struct vivi_fh  *fh=priv;
 885
 886         f->fmt.pix.width        = fh->width;
 887         f->fmt.pix.height       = fh->height;
 888         f->fmt.pix.field        = fh->vb_vidq.field;
 889         f->fmt.pix.pixelformat  = fh->fmt->fourcc;
 890         f->fmt.pix.bytesperline =
 891                 (f->fmt.pix.width * fh->fmt->depth) >> 3;
 892         f->fmt.pix.sizeimage =
 893                 f->fmt.pix.height * f->fmt.pix.bytesperline;
 894
 895         return (0);
 896 }
 897
 898 static int vidioc_try_fmt_cap (struct file *file, void *priv,
 899                         struct v4l2_format *f)
 900 {
 901         struct vivi_fmt *fmt;
 902         enum v4l2_field field;
 903         unsigned int maxw, maxh;
 904
 905         if (format.fourcc != f->fmt.pix.pixelformat) {
 906                 dprintk(1,"Fourcc format (0x%08x) invalid. Driver accepts "
 907                         "only 0x%08x\n",f->fmt.pix.pixelformat,format.fourcc);
 908                 return -EINVAL;
 909         }
 910         fmt=&format;
 911
 912         field = f->fmt.pix.field;
 913
 914         if (field == V4L2_FIELD_ANY) {
 915 //              field=V4L2_FIELD_INTERLACED;
 916                 field=V4L2_FIELD_SEQ_TB;
 917         } else if (V4L2_FIELD_INTERLACED != field) {
 918                 dprintk(1,"Field type invalid.\n");
 919                 return -EINVAL;
 920         }
 921
 922         maxw  = norm_maxw();
 923         maxh  = norm_maxh();
 924
 925         f->fmt.pix.field = field;
 926         if (f->fmt.pix.height < 32)
 927                 f->fmt.pix.height = 32;
 928         if (f->fmt.pix.height > maxh)
 929                 f->fmt.pix.height = maxh;
 930         if (f->fmt.pix.width < 48)
 931                 f->fmt.pix.width = 48;
 932         if (f->fmt.pix.width > maxw)
 933                 f->fmt.pix.width = maxw;
 934         f->fmt.pix.width &= ~0x03;
 935         f->fmt.pix.bytesperline =
 936                 (f->fmt.pix.width * fmt->depth) >> 3;
 937         f->fmt.pix.sizeimage =
 938                 f->fmt.pix.height * f->fmt.pix.bytesperline;
 939
 940         return 0;
 941 }
 942
 943 /*FIXME: This seems to be generic enough to be at videodev2 */
 944 static int vidioc_s_fmt_cap (struct file *file, void *priv,
 945                                         struct v4l2_format *f)
 946 {
 947         struct vivi_fh  *fh=priv;
 948         int ret = vidioc_try_fmt_cap(file,fh,f);
 949         if (ret < 0)
 950                 return (ret);
 951
 952         fh->fmt           = &format;
 953         fh->width         = f->fmt.pix.width;
 954         fh->height        = f->fmt.pix.height;
 955         fh->vb_vidq.field = f->fmt.pix.field;
 956         fh->type          = f->type;
 957
 958         return (0);
 959 }
 960
 961 static int vidioc_reqbufs (struct file *file, void *priv, struct v4l2_requestbuffers *p)
 962 {
 963         struct vivi_fh  *fh=priv;
 964
 965         return (videobuf_reqbufs(&fh->vb_vidq, p));
 966 }
 967
 968 static int vidioc_querybuf (struct file *file, void *priv, struct v4l2_buffer *p)
 969 {
 970         struct vivi_fh  *fh=priv;
 971
 972         return (videobuf_querybuf(&fh->vb_vidq, p));
 973 }
 974
 975 static int vidioc_qbuf (struct file *file, void *priv, struct v4l2_buffer *p)
 976 {
 977         struct vivi_fh  *fh=priv;
 978
 979         return (videobuf_qbuf(&fh->vb_vidq, p));
 980 }
 981
 982 static int vidioc_dqbuf (struct file *file, void *priv, struct v4l2_buffer *p)
 983 {
 984         struct vivi_fh  *fh=priv;
 985
 986         return (videobuf_dqbuf(&fh->vb_vidq, p,
 987                                 file->f_flags & O_NONBLOCK));
 988 }
 989
 990 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 991 static int vidiocgmbuf (struct file *file, void *priv, struct video_mbuf *mbuf)
 992 {
 993         struct vivi_fh  *fh=priv;
 994         struct videobuf_queue *q=&fh->vb_vidq;
 995         struct v4l2_requestbuffers req;
 996         unsigned int i;
 997         int ret;
 998
 999         req.type   = q->type;
1000         req.count  = 8;
1001         req.memory = V4L2_MEMORY_MMAP;
1002         ret = videobuf_reqbufs(q,&req);
1003         if (ret < 0)
1004                 return (ret);
1005
1006         mbuf->frames = req.count;
1007         mbuf->size   = 0;
1008         for (i = 0; i < mbuf->frames; i++) {
1009                 mbuf->offsets[i]  = q->bufs[i]->boff;
1010                 mbuf->size       += q->bufs[i]->bsize;
1011         }
1012         return (0);
1013 }
1014 #endif
1015
1016 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
1017 {
1018         struct vivi_fh  *fh=priv;
1019         struct vivi_dev *dev    = fh->dev;
1020
1021         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1022                 return -EINVAL;
1023         if (i != fh->type)
1024                 return -EINVAL;
1025
1026         if (!res_get(dev,fh))
1027                 return -EBUSY;
1028         return (videobuf_streamon(&fh->vb_vidq));
1029 }
1030
1031 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
1032 {
1033         struct vivi_fh  *fh=priv;
1034         struct vivi_dev *dev    = fh->dev;
1035
1036         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1037                 return -EINVAL;
1038         if (i != fh->type)
1039                 return -EINVAL;
1040
1041         videobuf_streamoff(&fh->vb_vidq);
1042         res_free(dev,fh);
1043
1044         return (0);
1045 }
1046
1047 static int vidioc_s_std (struct file *file, void *priv, v4l2_std_id *i)
1048 {
1049         return 0;
1050 }
1051
1052 /* only one input in this sample driver */
1053 static int vidioc_enum_input (struct file *file, void *priv,
1054                                 struct v4l2_input *inp)
1055 {
1056         if (inp->index != 0)
1057                 return -EINVAL;
1058
1059         inp->type = V4L2_INPUT_TYPE_CAMERA;
1060         inp->std = V4L2_STD_NTSC_M;
1061         strcpy(inp->name,"Camera");
1062
1063         return (0);
1064 }
1065
1066 static int vidioc_g_input (struct file *file, void *priv, unsigned int *i)
1067 {
1068         *i = 0;
1069
1070         return (0);
1071 }
1072 static int vidioc_s_input (struct file *file, void *priv, unsigned int i)
1073 {
1074         if (i > 0)
1075                 return -EINVAL;
1076
1077         return (0);
1078 }
1079
1080         /* --- controls ---------------------------------------------- */
1081 static int vidioc_queryctrl (struct file *file, void *priv,
1082                                 struct v4l2_queryctrl *qc)
1083 {
1084         int i;
1085
1086         for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1087                 if (qc->id && qc->id == vivi_qctrl[i].id) {
1088                         memcpy(qc, &(vivi_qctrl[i]),
1089                                 sizeof(*qc));
1090                         return (0);
1091                 }
1092
1093         return -EINVAL;
1094 }
1095
1096 static int vidioc_g_ctrl (struct file *file, void *priv,
1097                                 struct v4l2_control *ctrl)
1098 {
1099         int i;
1100
1101         for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1102                 if (ctrl->id == vivi_qctrl[i].id) {
1103                         ctrl->value=qctl_regs[i];
1104                         return (0);
1105                 }
1106
1107         return -EINVAL;
1108 }
1109 static int vidioc_s_ctrl (struct file *file, void *priv,
1110                                 struct v4l2_control *ctrl)
1111 {
1112         int i;
1113
1114         for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1115                 if (ctrl->id == vivi_qctrl[i].id) {
1116                         if (ctrl->value <
1117                                 vivi_qctrl[i].minimum
1118                                 || ctrl->value >
1119                                 vivi_qctrl[i].maximum) {
1120                                         return (-ERANGE);
1121                                 }
1122                         qctl_regs[i]=ctrl->value;
1123                         return (0);
1124                 }
1125         return -EINVAL;
1126 }
1127
1128 /* ------------------------------------------------------------------
1129         File operations for the device
1130    ------------------------------------------------------------------*/
1131
1132 #define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
1133
1134 static int vivi_open(struct inode *inode, struct file *file)
1135 {
1136         int minor = iminor(inode);
1137         struct vivi_dev *h,*dev = NULL;
1138         struct vivi_fh *fh;
1139         struct list_head *list;
1140         enum v4l2_buf_type type = 0;
1141         int i;
1142
1143         printk(KERN_DEBUG "vivi: open called (minor=%d)\n",minor);
1144
1145         list_for_each(list,&vivi_devlist) {
1146                 h = list_entry(list, struct vivi_dev, vivi_devlist);
1147                 if (h->vfd.minor == minor) {
1148                         dev  = h;
1149                         type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1150                 }
1151         }
1152         if (NULL == dev)
1153                 return -ENODEV;
1154
1155
1156
1157         /* If more than one user, mutex should be added */
1158         dev->users++;
1159
1160         dprintk(1,"open minor=%d type=%s users=%d\n",
1161                                 minor,v4l2_type_names[type],dev->users);
1162
1163         /* allocate + initialize per filehandle data */
1164         fh = kzalloc(sizeof(*fh),GFP_KERNEL);
1165         if (NULL == fh) {
1166                 dev->users--;
1167                 return -ENOMEM;
1168         }
1169
1170         file->private_data = fh;
1171         fh->dev      = dev;
1172
1173         fh->type     = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1174         fh->fmt      = &format;
1175         fh->width    = 640;
1176         fh->height   = 480;
1177
1178         /* Put all controls at a sane state */
1179         for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1180                 qctl_regs[i] =vivi_qctrl[i].default_value;
1181
1182         dprintk(1,"Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1183                 (unsigned long)fh,(unsigned long)dev,(unsigned long)&dev->vidq);
1184         dprintk(1,"Open: list_empty queued=%d\n",list_empty(&dev->vidq.queued));
1185         dprintk(1,"Open: list_empty active=%d\n",list_empty(&dev->vidq.active));
1186
1187         /* Resets frame counters */
1188         dev->h=0;
1189         dev->m=0;
1190         dev->s=0;
1191         dev->us=0;
1192         dev->jiffies=jiffies;
1193         sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
1194                         dev->h,dev->m,dev->s,(dev->us+500)/1000);
1195
1196         videobuf_queue_init(&fh->vb_vidq, &vivi_video_qops,
1197                         NULL, NULL,
1198                         fh->type,
1199                         V4L2_FIELD_INTERLACED,
1200                         sizeof(struct vivi_buffer),fh);
1201
1202         return 0;
1203 }
1204
1205 static ssize_t
1206 vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1207 {
1208         struct vivi_fh        *fh = file->private_data;
1209
1210         if (fh->type==V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1211                 if (res_locked(fh->dev))
1212                         return -EBUSY;
1213                 return videobuf_read_one(&fh->vb_vidq, data, count, ppos,
1214                                         file->f_flags & O_NONBLOCK);
1215         }
1216         return 0;
1217 }
1218
1219 static unsigned int
1220 vivi_poll(struct file *file, struct poll_table_struct *wait)
1221 {
1222         struct vivi_fh        *fh = file->private_data;
1223         struct vivi_buffer    *buf;
1224
1225         dprintk(1,"%s\n",__FUNCTION__);
1226
1227         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1228                 return POLLERR;
1229
1230         if (res_get(fh->dev,fh)) {
1231                 dprintk(1,"poll: mmap interface\n");
1232                 /* streaming capture */
1233                 if (list_empty(&fh->vb_vidq.stream))
1234                         return POLLERR;
1235                 buf = list_entry(fh->vb_vidq.stream.next,struct vivi_buffer,vb.stream);
1236         } else {
1237                 dprintk(1,"poll: read() interface\n");
1238                 /* read() capture */
1239                 buf = (struct vivi_buffer*)fh->vb_vidq.read_buf;
1240                 if (NULL == buf)
1241                         return POLLERR;
1242         }
1243         poll_wait(file, &buf->vb.done, wait);
1244         if (buf->vb.state == STATE_DONE ||
1245             buf->vb.state == STATE_ERROR)
1246                 return POLLIN|POLLRDNORM;
1247         return 0;
1248 }
1249
1250 static int vivi_release(struct inode *inode, struct file *file)
1251 {
1252         struct vivi_fh         *fh = file->private_data;
1253         struct vivi_dev *dev       = fh->dev;
1254         struct vivi_dmaqueue *vidq = &dev->vidq;
1255
1256         int minor = iminor(inode);
1257
1258         vivi_stop_thread(vidq);
1259         videobuf_mmap_free(&fh->vb_vidq);
1260
1261         kfree (fh);
1262
1263         dev->users--;
1264
1265         printk(KERN_DEBUG "vivi: close called (minor=%d, users=%d)\n",minor,dev->users);
1266
1267         return 0;
1268 }
1269
1270 static int
1271 vivi_mmap(struct file *file, struct vm_area_struct * vma)
1272 {
1273         struct vivi_fh        *fh = file->private_data;
1274         int ret;
1275
1276         dprintk (1,"mmap called, vma=0x%08lx\n",(unsigned long)vma);
1277
1278         ret=videobuf_mmap_mapper(&fh->vb_vidq, vma);
1279
1280         dprintk (1,"vma start=0x%08lx, size=%ld, ret=%d\n",
1281                 (unsigned long)vma->vm_start,
1282                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1283                 ret);
1284
1285         return ret;
1286 }
1287
1288 static struct file_operations vivi_fops = {
1289         .owner          = THIS_MODULE,
1290         .open           = vivi_open,
1291         .release        = vivi_release,
1292         .read           = vivi_read,
1293         .poll           = vivi_poll,
1294         .ioctl          = video_ioctl2, /* V4L2 ioctl handler */
1295         .mmap           = vivi_mmap,
1296         .llseek         = no_llseek,
1297 };
1298
1299 static struct video_device vivi = {
1300         .name           = "vivi",
1301         .type           = VID_TYPE_CAPTURE,
1302         .hardware       = 0,
1303         .fops           = &vivi_fops,
1304         .minor          = -1,
1305 //      .release        = video_device_release,
1306
1307         .vidioc_querycap      = vidioc_querycap,
1308         .vidioc_enum_fmt_cap  = vidioc_enum_fmt_cap,
1309         .vidioc_g_fmt_cap     = vidioc_g_fmt_cap,
1310         .vidioc_try_fmt_cap   = vidioc_try_fmt_cap,
1311         .vidioc_s_fmt_cap     = vidioc_s_fmt_cap,
1312         .vidioc_reqbufs       = vidioc_reqbufs,
1313         .vidioc_querybuf      = vidioc_querybuf,
1314         .vidioc_qbuf          = vidioc_qbuf,
1315         .vidioc_dqbuf         = vidioc_dqbuf,
1316         .vidioc_s_std         = vidioc_s_std,
1317         .vidioc_enum_input    = vidioc_enum_input,
1318         .vidioc_g_input       = vidioc_g_input,
1319         .vidioc_s_input       = vidioc_s_input,
1320         .vidioc_queryctrl     = vidioc_queryctrl,
1321         .vidioc_g_ctrl        = vidioc_g_ctrl,
1322         .vidioc_s_ctrl        = vidioc_s_ctrl,
1323         .vidioc_streamon      = vidioc_streamon,
1324         .vidioc_streamoff     = vidioc_streamoff,
1325 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1326         .vidiocgmbuf          = vidiocgmbuf,
1327 #endif
1328         .tvnorms              = V4L2_STD_NTSC_M,
1329         .current_norm         = V4L2_STD_NTSC_M,
1330 };
1331 /* -----------------------------------------------------------------
1332         Initialization and module stuff
1333    ------------------------------------------------------------------*/
1334
1335 static int __init vivi_init(void)
1336 {
1337         int ret;
1338         struct vivi_dev *dev;
1339
1340         dev = kzalloc(sizeof(*dev),GFP_KERNEL);
1341         if (NULL == dev)
1342                 return -ENOMEM;
1343         list_add_tail(&dev->vivi_devlist,&vivi_devlist);
1344
1345         /* init video dma queues */
1346         INIT_LIST_HEAD(&dev->vidq.active);
1347         INIT_LIST_HEAD(&dev->vidq.queued);
1348
1349         /* initialize locks */
1350         init_MUTEX(&dev->lock);
1351
1352         dev->vidq.timeout.function = vivi_vid_timeout;
1353         dev->vidq.timeout.data     = (unsigned long)dev;
1354         init_timer(&dev->vidq.timeout);
1355
1356         ret = video_register_device(&vivi, VFL_TYPE_GRABBER, video_nr);
1357         printk(KERN_INFO "Video Technology Magazine Virtual Video Capture Board (Load status: %d)\n", ret);
1358         return ret;
1359 }
1360
1361 static void __exit vivi_exit(void)
1362 {
1363         struct vivi_dev *h;
1364         struct list_head *list;
1365
1366         list_for_each(list,&vivi_devlist) {
1367                 h = list_entry(list, struct vivi_dev, vivi_devlist);
1368                 kfree (h);
1369         }
1370         video_unregister_device(&vivi);
1371 }
1372
1373 module_init(vivi_init);
1374 module_exit(vivi_exit);
1375
1376 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
1377 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
1378 MODULE_LICENSE("Dual BSD/GPL");
1379
1380 module_param(video_nr, int, 0);
1381
1382 module_param_named(debug,vivi.debug, int, 0644);
1383 MODULE_PARM_DESC(debug,"activates debug info");
1384
1385 module_param(vid_limit,int,0644);
1386 MODULE_PARM_DESC(vid_limit,"capture memory limit in megabytes");
1387