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 <media/video-buf.h>
  30 #include <media/v4l2-common.h>
  31 #include <linux/kthread.h>
  32 #include <linux/highmem.h>
  33
  34 /* Wake up at about 30 fps */
  35 #define WAKE_NUMERATOR 30
  36 #define WAKE_DENOMINATOR 1001
  37 #define BUFFER_TIMEOUT     msecs_to_jiffies(500)  /* 0.5 seconds */
  38
  39 /* These timers are for 1 fps - used only for testing */
  40 //#define WAKE_DENOMINATOR 30 /* hack for testing purposes */
  41 //#define BUFFER_TIMEOUT     msecs_to_jiffies(5000)  /* 5 seconds */
  42
  43 #include "font.h"
  44
  45 #ifndef kzalloc
  46 #define kzalloc(size, flags)                            \
  47 ({                                                      \
  48         void *__ret = kmalloc(size, flags);             \
  49         if (__ret)                                      \
  50                 memset(__ret, 0, size);                 \
  51         __ret;                                          \
  52 })
  53 #endif
  54
  55 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
  56 MODULE_AUTHOR("Ted Walther and John Sokol");
  57 MODULE_LICENSE("Dual BSD/GPL");
  58
  59 #define VIVI_MAJOR_VERSION 0
  60 #define VIVI_MINOR_VERSION 4
  61 #define VIVI_RELEASE 0
  62 #define VIVI_VERSION KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE)
  63
  64 static int video_nr = -1;        /* /dev/videoN, -1 for autodetect */
  65 module_param(video_nr, int, 0);
  66
  67 static int debug = 0;
  68 module_param(debug, int, 0);
  69
  70 static unsigned int vid_limit = 16;
  71 module_param(vid_limit,int,0644);
  72 MODULE_PARM_DESC(vid_limit,"capture memory limit in megabytes");
  73
  74 /* supported controls */
  75 static struct v4l2_queryctrl vivi_qctrl[] = {
  76         {
  77                 .id            = V4L2_CID_AUDIO_VOLUME,
  78                 .name          = "Volume",
  79                 .minimum       = 0,
  80                 .maximum       = 65535,
  81                 .step          = 65535/100,
  82                 .default_value = 65535,
  83                 .flags         = 0,
  84                 .type          = V4L2_CTRL_TYPE_INTEGER,
  85         },{
  86                 .id            = V4L2_CID_BRIGHTNESS,
  87                 .type          = V4L2_CTRL_TYPE_INTEGER,
  88                 .name          = "Brightness",
  89                 .minimum       = 0,
  90                 .maximum       = 255,
  91                 .step          = 1,
  92                 .default_value = 127,
  93                 .flags         = 0,
  94         }, {
  95                 .id            = V4L2_CID_CONTRAST,
  96                 .type          = V4L2_CTRL_TYPE_INTEGER,
  97                 .name          = "Contrast",
  98                 .minimum       = 0,
  99                 .maximum       = 255,
 100                 .step          = 0x1,
 101                 .default_value = 0x10,
 102                 .flags         = 0,
 103         }, {
 104                 .id            = V4L2_CID_SATURATION,
 105                 .type          = V4L2_CTRL_TYPE_INTEGER,
 106                 .name          = "Saturation",
 107                 .minimum       = 0,
 108                 .maximum       = 255,
 109                 .step          = 0x1,
 110                 .default_value = 127,
 111                 .flags         = 0,
 112         }, {
 113                 .id            = V4L2_CID_HUE,
 114                 .type          = V4L2_CTRL_TYPE_INTEGER,
 115                 .name          = "Hue",
 116                 .minimum       = -128,
 117                 .maximum       = 127,
 118                 .step          = 0x1,
 119                 .default_value = 0,
 120                 .flags         = 0,
 121         }
 122 };
 123
 124 static int qctl_regs[ARRAY_SIZE(vivi_qctrl)];
 125
 126 #define dprintk(level,fmt, arg...)                           \
 127         do {                                                 \
 128                 if (debug >= (level))                        \
 129                         printk(KERN_DEBUG "vivi: " fmt , ## arg);    \
 130         } while (0)
 131
 132 /* ------------------------------------------------------------------
 133         Basic structures
 134    ------------------------------------------------------------------*/
 135
 136 struct vivi_fmt {
 137         char  *name;
 138         u32   fourcc;          /* v4l2 format id */
 139         int   depth;
 140 };
 141
 142 static struct vivi_fmt format = {
 143         .name     = "4:2:2, packed, YUYV",
 144         .fourcc   = V4L2_PIX_FMT_YUYV,
 145         .depth    = 16,
 146 };
 147
 148 struct sg_to_addr {
 149         int pos;
 150         struct scatterlist *sg;
 151 };
 152
 153 /* buffer for one video frame */
 154 struct vivi_buffer {
 155         /* common v4l buffer stuff -- must be first */
 156         struct videobuf_buffer vb;
 157
 158         struct vivi_fmt        *fmt;
 159
 160         struct sg_to_addr      *to_addr;
 161 };
 162
 163 struct vivi_dmaqueue {
 164         struct list_head       active;
 165         struct list_head       queued;
 166         struct timer_list      timeout;
 167
 168         /* thread for generating video stream*/
 169         struct task_struct         *kthread;
 170         wait_queue_head_t          wq;
 171         /* Counters to control fps rate */
 172         int                        frame;
 173         int                        ini_jiffies;
 174 };
 175
 176 static LIST_HEAD(vivi_devlist);
 177
 178 struct vivi_dev {
 179         struct list_head           vivi_devlist;
 180
 181         struct semaphore           lock;
 182
 183         int                        users;
 184
 185         /* various device info */
 186         unsigned int               resources;
 187         struct video_device        video_dev;
 188
 189         struct vivi_dmaqueue       vidq;
 190
 191         /* Several counters */
 192         int                        h,m,s,us,jiffies;
 193         char                       timestr[13];
 194 };
 195
 196 struct vivi_fh {
 197         struct vivi_dev            *dev;
 198
 199         /* video capture */
 200         struct vivi_fmt            *fmt;
 201         unsigned int               width,height;
 202         struct videobuf_queue      vb_vidq;
 203
 204         enum v4l2_buf_type         type;
 205 };
 206
 207 /* ------------------------------------------------------------------
 208         DMA and thread functions
 209    ------------------------------------------------------------------*/
 210
 211 /* Bars and Colors should match positions */
 212
 213 enum colors {
 214         WHITE,
 215         AMBAR,
 216         CYAN,
 217         GREEN,
 218         MAGENTA,
 219         RED,
 220         BLUE
 221 };
 222
 223 static u8 bars[8][3] = {
 224         /* R   G   B */
 225         {204,204,204},  /* white */
 226         {208,208,  0},  /* ambar */
 227         {  0,206,206},  /* cyan */
 228         {  0,239,  0},  /* green */
 229         {239,  0,239},  /* magenta */
 230         {205,  0,  0},  /* red */
 231         {  0,  0,255},  /* blue */
 232         {  0,  0,  0}
 233 };
 234
 235 #define TO_Y(r,g,b) (((16829*r +33039*g +6416*b  + 32768)>>16)+16)
 236 /* RGB to  V(Cr) Color transform */
 237 #define TO_V(r,g,b) (((28784*r -24103*g -4681*b  + 32768)>>16)+128)
 238 /* RGB to  U(Cb) Color transform */
 239 #define TO_U(r,g,b) (((-9714*r -19070*g +28784*b + 32768)>>16)+128)
 240
 241 #define TSTAMP_MIN_Y 24
 242 #define TSTAMP_MAX_Y TSTAMP_MIN_Y+15
 243 #define TSTAMP_MIN_X 64
 244
 245 void prep_to_addr(struct sg_to_addr to_addr[],struct videobuf_buffer *vb)
 246 {
 247         int i, pos=0;
 248
 249         for (i=0;i<vb->dma.nr_pages;i++) {
 250                 to_addr[i].sg=&vb->dma.sglist[i];
 251                 to_addr[i].pos=pos;
 252                 pos += vb->dma.sglist[i].length;
 253         }
 254 }
 255
 256 inline int get_addr_pos(int pos, int pages, struct sg_to_addr to_addr[])
 257 {
 258         int p1=0,p2=pages-1,p3=pages/2;
 259
 260         /* Sanity test */
 261         BUG_ON (pos>=to_addr[p2].pos+to_addr[p2].sg->length);
 262
 263         while (p1+1<p2) {
 264                 if (pos < to_addr[p3].pos) {
 265                         p2=p3;
 266                 } else {
 267                         p1=p3;
 268                 }
 269                 p3=(p1+p2)/2;
 270         }
 271         if (pos >= to_addr[p2].pos)
 272                 p1=p2;
 273
 274         return (p1);
 275 }
 276
 277 void gen_line(struct sg_to_addr to_addr[],int inipos,int pages,int wmax,
 278                                         int hmax, int line, char *timestr)
 279 {
 280         int  w,i,j,pos=inipos,pgpos,oldpg,y;
 281         char *p,*s,*basep;
 282         struct page *pg;
 283         u8   chr,r,g,b,color;
 284
 285         /* Get first addr pointed to pixel position */
 286         oldpg=get_addr_pos(pos,pages,to_addr);
 287         pg=pfn_to_page(to_addr[oldpg].sg->dma_address >> PAGE_SHIFT);
 288         basep = kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[oldpg].sg->offset;
 289
 290         /* We will just duplicate the second pixel at the packet */
 291         wmax/=2;
 292
 293         /* Generate a standard color bar pattern */
 294         for (w=0;w<wmax;w++) {
 295                 r=bars[w*7/wmax][0];
 296                 g=bars[w*7/wmax][1];
 297                 b=bars[w*7/wmax][2];
 298
 299                 for (color=0;color<4;color++) {
 300                         pgpos=get_addr_pos(pos,pages,to_addr);
 301                         if (pgpos!=oldpg) {
 302                                 pg=pfn_to_page(to_addr[pgpos].sg->dma_address >> PAGE_SHIFT);
 303                                 kunmap_atomic(basep, KM_BOUNCE_READ);
 304                                 basep= kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[pgpos].sg->offset;
 305                                 oldpg=pgpos;
 306                         }
 307                         p=basep+pos-to_addr[pgpos].pos;
 308
 309                         switch (color) {
 310                                 case 0:
 311                                 case 2:
 312                                         *p=TO_Y(r,g,b);         /* Luminance */
 313                                         break;
 314                                 case 1:
 315                                         *p=TO_U(r,g,b);         /* Cb */
 316                                         break;
 317                                 case 3:
 318                                         *p=TO_V(r,g,b);         /* Cr */
 319                                         break;
 320                         }
 321                         pos++;
 322                 }
 323         }
 324
 325         /* Checks if it is possible to show timestamp */
 326         if (TSTAMP_MAX_Y>=hmax)
 327                 goto end;
 328         if (TSTAMP_MIN_X+strlen(timestr)>=wmax)
 329                 goto end;
 330
 331         /* Print stream time */
 332         if (line>=TSTAMP_MIN_Y && line<=TSTAMP_MAX_Y) {
 333                 j=TSTAMP_MIN_X;
 334                 for (s=timestr;*s;s++) {
 335                         chr=rom8x16_bits[(*s-0x30)*16+line-TSTAMP_MIN_Y];
 336                         for (i=0;i<7;i++) {
 337                                 if (chr&1<<(7-i)) { /* Font color*/
 338                                         r=bars[BLUE][0];
 339                                         g=bars[BLUE][1];
 340                                         b=bars[BLUE][2];
 341                                         r=g=b=0;
 342                                         g=198;
 343                                 } else { /* Background color */
 344                                         r=bars[WHITE][0];
 345                                         g=bars[WHITE][1];
 346                                         b=bars[WHITE][2];
 347                                         r=g=b=0;
 348                                 }
 349
 350                                 pos=inipos+j*2;
 351                                 for (color=0;color<4;color++) {
 352                                         pgpos=get_addr_pos(pos,pages,to_addr);
 353                                         if (pgpos!=oldpg) {
 354                                                 pg=pfn_to_page(to_addr[pgpos].
 355                                                                 sg->dma_address
 356                                                                 >> PAGE_SHIFT);
 357                                                 kunmap_atomic(basep,
 358                                                                 KM_BOUNCE_READ);
 359                                                 basep= kmap_atomic(pg,
 360                                                         KM_BOUNCE_READ)+
 361                                                         to_addr[pgpos].sg->offset;
 362                                                 oldpg=pgpos;
 363                                         }
 364                                         p=basep+pos-to_addr[pgpos].pos;
 365
 366                                         y=TO_Y(r,g,b);
 367
 368                                         switch (color) {
 369                                                 case 0:
 370                                                 case 2:
 371                                                         *p=TO_Y(r,g,b);         /* Luminance */
 372                                                         break;
 373                                                 case 1:
 374                                                         *p=TO_U(r,g,b);         /* Cb */
 375                                                         break;
 376                                                 case 3:
 377                                                         *p=TO_V(r,g,b);         /* Cr */
 378                                                         break;
 379                                         }
 380                                         pos++;
 381                                 }
 382                                 j++;
 383                         }
 384                 }
 385         }
 386
 387
 388 end:
 389         kunmap_atomic(basep, KM_BOUNCE_READ);
 390 }
 391 static void vivi_fillbuff(struct vivi_dev *dev,struct vivi_buffer *buf)
 392 {
 393         int h,pos=0;
 394         int hmax  = buf->vb.height;
 395         int wmax  = buf->vb.width;
 396         struct videobuf_buffer *vb=&buf->vb;
 397         struct sg_to_addr *to_addr=buf->to_addr;
 398         struct timeval ts;
 399
 400         /* Test if DMA mapping is ready */
 401         if (!vb->dma.sglist[0].dma_address)
 402                 return;
 403
 404         prep_to_addr(to_addr,vb);
 405
 406         /* Check if there is enough memory */
 407         BUG_ON(buf->vb.dma.nr_pages << PAGE_SHIFT < (buf->vb.width*buf->vb.height)*2);
 408
 409         for (h=0;h<hmax;h++) {
 410                 gen_line(to_addr,pos,vb->dma.nr_pages,wmax,hmax,h,dev->timestr);
 411                 pos += wmax*2;
 412         }
 413
 414         /* Updates stream time */
 415
 416         dev->us+=jiffies_to_usecs(jiffies-dev->jiffies);
 417         dev->jiffies=jiffies;
 418         if (dev->us>=1000000) {
 419                 dev->us-=1000000;
 420                 dev->s++;
 421                 if (dev->s>=60) {
 422                         dev->s-=60;
 423                         dev->m++;
 424                         if (dev->m>60) {
 425                                 dev->m-=60;
 426                                 dev->h++;
 427                                 if (dev->h>24)
 428                                         dev->h-=24;
 429                         }
 430                 }
 431         }
 432         sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
 433                         dev->h,dev->m,dev->s,(dev->us+500)/1000);
 434
 435         dprintk(2,"vivifill at %s: Buffer 0x%08lx size= %d\n",dev->timestr,
 436                         (unsigned long)buf->vb.dma.vmalloc,pos);
 437
 438         /* Advice that buffer was filled */
 439         buf->vb.state = STATE_DONE;
 440         buf->vb.field_count++;
 441         do_gettimeofday(&ts);
 442         buf->vb.ts = ts;
 443
 444         list_del(&buf->vb.queue);
 445         wake_up(&buf->vb.done);
 446 }
 447
 448 static int restart_video_queue(struct vivi_dmaqueue *dma_q);
 449
 450 static void vivi_thread_tick(struct vivi_dmaqueue  *dma_q)
 451 {
 452         struct vivi_buffer    *buf;
 453         struct vivi_dev *dev= container_of(dma_q,struct vivi_dev,vidq);
 454
 455         int bc;
 456
 457         /* Announces videobuf that all went ok */
 458         for (bc = 0;; bc++) {
 459                 if (list_empty(&dma_q->active)) {
 460                         dprintk(1,"No active queue to serve\n");
 461                         break;
 462                 }
 463
 464                 buf = list_entry(dma_q->active.next,
 465                                  struct vivi_buffer, vb.queue);
 466
 467                 /* Nobody is waiting something to be done, just return */
 468                 if (!waitqueue_active(&buf->vb.done)) {
 469                         mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 470                         return;
 471                 }
 472
 473                 do_gettimeofday(&buf->vb.ts);
 474                 dprintk(2,"[%p/%d] wakeup\n",buf,buf->vb.i);
 475
 476                 /* Fill buffer */
 477                 vivi_fillbuff(dev,buf);
 478         }
 479         if (list_empty(&dma_q->active)) {
 480                 del_timer(&dma_q->timeout);
 481         } else {
 482                 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 483         }
 484         if (bc != 1)
 485                 dprintk(1,"%s: %d buffers handled (should be 1)\n",__FUNCTION__,bc);
 486 }
 487
 488 void vivi_sleep(struct vivi_dmaqueue  *dma_q)
 489 {
 490         int timeout;
 491         DECLARE_WAITQUEUE(wait, current);
 492
 493         dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
 494
 495         add_wait_queue(&dma_q->wq, &wait);
 496         if (!kthread_should_stop()) {
 497                 dma_q->frame++;
 498
 499                 /* Calculate time to wake up */
 500                 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
 501
 502                 if (timeout <= 0) {
 503                         int old=dma_q->frame;
 504                         dma_q->frame=(jiffies_to_msecs(jiffies-dma_q->ini_jiffies)*WAKE_DENOMINATOR)/(WAKE_NUMERATOR*1000)+1;
 505
 506                         timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
 507
 508                         dprintk(1,"underrun, losed %d frames. "
 509                                   "Now, frame is %d. Waking on %d jiffies\n",
 510                                         dma_q->frame-old,dma_q->frame,timeout);
 511                 } else
 512                         dprintk(1,"will sleep for %i jiffies\n",timeout);
 513
 514                 vivi_thread_tick(dma_q);
 515
 516                 schedule_timeout_interruptible (timeout);
 517         }
 518
 519         remove_wait_queue(&dma_q->wq, &wait);
 520         try_to_freeze();
 521 }
 522
 523 int vivi_thread(void *data)
 524 {
 525         struct vivi_dmaqueue  *dma_q=data;
 526
 527         dprintk(1,"thread started\n");
 528
 529         for (;;) {
 530                 vivi_sleep(dma_q);
 531
 532                 if (kthread_should_stop())
 533                         break;
 534         }
 535         dprintk(1, "thread: exit\n");
 536         return 0;
 537 }
 538
 539 int vivi_start_thread(struct vivi_dmaqueue  *dma_q)
 540 {
 541         dma_q->frame=0;
 542         dma_q->ini_jiffies=jiffies;
 543
 544         dprintk(1,"%s\n",__FUNCTION__);
 545         init_waitqueue_head(&dma_q->wq);
 546
 547         dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi");
 548
 549         if (dma_q->kthread == NULL) {
 550                 printk(KERN_ERR "vivi: kernel_thread() failed\n");
 551                 return -EINVAL;
 552         }
 553         dprintk(1,"returning from %s\n",__FUNCTION__);
 554         return 0;
 555 }
 556
 557 void vivi_stop_thread(struct vivi_dmaqueue  *dma_q)
 558 {
 559         dprintk(1,"%s\n",__FUNCTION__);
 560         /* shutdown control thread */
 561         if (dma_q->kthread) {
 562                 kthread_stop(dma_q->kthread);
 563                 dma_q->kthread=NULL;
 564         }
 565 }
 566
 567 static int restart_video_queue(struct vivi_dmaqueue *dma_q)
 568 {
 569         struct vivi_buffer *buf, *prev;
 570         struct list_head *item;
 571
 572         dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
 573
 574         if (!list_empty(&dma_q->active)) {
 575                 buf = list_entry(dma_q->active.next, struct vivi_buffer, vb.queue);
 576                 dprintk(2,"restart_queue [%p/%d]: restart dma\n",
 577                         buf, buf->vb.i);
 578
 579                 dprintk(1,"Restarting video dma\n");
 580                 vivi_stop_thread(dma_q);
 581 //              vivi_start_thread(dma_q);
 582
 583                 /* cancel all outstanding capture / vbi requests */
 584                 list_for_each(item,&dma_q->active) {
 585                         buf = list_entry(item, struct vivi_buffer, vb.queue);
 586
 587                         list_del(&buf->vb.queue);
 588                         buf->vb.state = STATE_ERROR;
 589                         wake_up(&buf->vb.done);
 590                 }
 591                 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 592
 593                 return 0;
 594         }
 595
 596         prev = NULL;
 597         for (;;) {
 598                 if (list_empty(&dma_q->queued))
 599                         return 0;
 600                 buf = list_entry(dma_q->queued.next, struct vivi_buffer, vb.queue);
 601                 if (NULL == prev) {
 602                         list_del(&buf->vb.queue);
 603                         list_add_tail(&buf->vb.queue,&dma_q->active);
 604
 605                         dprintk(1,"Restarting video dma\n");
 606                         vivi_stop_thread(dma_q);
 607                         vivi_start_thread(dma_q);
 608
 609                         buf->vb.state = STATE_ACTIVE;
 610                         mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 611                         dprintk(2,"[%p/%d] restart_queue - first active\n",
 612                                 buf,buf->vb.i);
 613
 614                 } else if (prev->vb.width  == buf->vb.width  &&
 615                            prev->vb.height == buf->vb.height &&
 616                            prev->fmt       == buf->fmt) {
 617                         list_del(&buf->vb.queue);
 618                         list_add_tail(&buf->vb.queue,&dma_q->active);
 619                         buf->vb.state = STATE_ACTIVE;
 620                         dprintk(2,"[%p/%d] restart_queue - move to active\n",
 621                                 buf,buf->vb.i);
 622                 } else {
 623                         return 0;
 624                 }
 625                 prev = buf;
 626         }
 627 }
 628
 629 static void vivi_vid_timeout(unsigned long data)
 630 {
 631         struct vivi_dev      *dev  = (struct vivi_dev*)data;
 632         struct vivi_dmaqueue *vidq = &dev->vidq;
 633         struct vivi_buffer   *buf;
 634
 635         while (!list_empty(&vidq->active)) {
 636                 buf = list_entry(vidq->active.next, struct vivi_buffer, vb.queue);
 637                 list_del(&buf->vb.queue);
 638                 buf->vb.state = STATE_ERROR;
 639                 wake_up(&buf->vb.done);
 640                 printk("vivi/0: [%p/%d] timeout\n", buf, buf->vb.i);
 641         }
 642
 643         restart_video_queue(vidq);
 644 }
 645
 646 /* ------------------------------------------------------------------
 647         Videobuf operations
 648    ------------------------------------------------------------------*/
 649 static int
 650 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 651 {
 652         struct vivi_fh *fh = vq->priv_data;
 653
 654         *size = fh->width*fh->height*2;
 655
 656         if (0 == *count)
 657                 *count = 32;
 658         while (*size * *count > vid_limit * 1024 * 1024)
 659                 (*count)--;
 660         return 0;
 661 }
 662
 663 void
 664 free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
 665 {
 666         dprintk(1,"%s\n",__FUNCTION__);
 667
 668         if (in_interrupt())
 669                 BUG();
 670
 671         /*FIXME: Maybe a spinlock is required here */
 672         kfree(buf->to_addr);
 673         buf->to_addr=NULL;
 674
 675         videobuf_waiton(&buf->vb,0,0);
 676         videobuf_dma_unmap(vq, &buf->vb.dma);
 677         videobuf_dma_free(&buf->vb.dma);
 678         buf->vb.state = STATE_NEEDS_INIT;
 679 }
 680
 681 #define norm_maxw() 1024
 682 #define norm_maxh() 768
 683 static int
 684 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 685                                                 enum v4l2_field field)
 686 {
 687         struct vivi_fh     *fh  = vq->priv_data;
 688         struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
 689         int rc, init_buffer = 0;
 690
 691 //      dprintk(1,"%s, field=%d\n",__FUNCTION__,field);
 692
 693         BUG_ON(NULL == fh->fmt);
 694         if (fh->width  < 48 || fh->width  > norm_maxw() ||
 695             fh->height < 32 || fh->height > norm_maxh())
 696                 return -EINVAL;
 697         buf->vb.size = fh->width*fh->height*2;
 698         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
 699                 return -EINVAL;
 700
 701         if (buf->fmt       != fh->fmt    ||
 702             buf->vb.width  != fh->width  ||
 703             buf->vb.height != fh->height ||
 704         buf->vb.field  != field) {
 705                 buf->fmt       = fh->fmt;
 706                 buf->vb.width  = fh->width;
 707                 buf->vb.height = fh->height;
 708                 buf->vb.field  = field;
 709                 init_buffer = 1;
 710         }
 711
 712         if (STATE_NEEDS_INIT == buf->vb.state) {
 713                 if (0 != (rc = videobuf_iolock(vq,&buf->vb,NULL)))
 714                         goto fail;
 715         }
 716
 717         buf->vb.state = STATE_PREPARED;
 718
 719         if (NULL == (buf->to_addr = kmalloc(sizeof(*buf->to_addr) * vb->dma.nr_pages,GFP_KERNEL))) {
 720                 rc=-ENOMEM;
 721                 goto fail;
 722         }
 723
 724         return 0;
 725
 726 fail:
 727         free_buffer(vq,buf);
 728         return rc;
 729 }
 730
 731 static void
 732 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 733 {
 734         struct vivi_buffer    *buf     = container_of(vb,struct vivi_buffer,vb);
 735         struct vivi_fh        *fh      = vq->priv_data;
 736         struct vivi_dev       *dev     = fh->dev;
 737         struct vivi_dmaqueue  *vidq    = &dev->vidq;
 738         struct vivi_buffer    *prev;
 739
 740         if (!list_empty(&vidq->queued)) {
 741                 dprintk(1,"adding vb queue=0x%08lx\n",(unsigned long)&buf->vb.queue);
 742                 list_add_tail(&buf->vb.queue,&vidq->queued);
 743                 buf->vb.state = STATE_QUEUED;
 744                 dprintk(2,"[%p/%d] buffer_queue - append to queued\n",
 745                         buf, buf->vb.i);
 746         } else if (list_empty(&vidq->active)) {
 747                 list_add_tail(&buf->vb.queue,&vidq->active);
 748
 749                 buf->vb.state = STATE_ACTIVE;
 750                 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
 751                 dprintk(2,"[%p/%d] buffer_queue - first active\n",
 752                         buf, buf->vb.i);
 753
 754                 vivi_start_thread(vidq);
 755         } else {
 756                 prev = list_entry(vidq->active.prev, struct vivi_buffer, vb.queue);
 757                 if (prev->vb.width  == buf->vb.width  &&
 758                     prev->vb.height == buf->vb.height &&
 759                     prev->fmt       == buf->fmt) {
 760                         list_add_tail(&buf->vb.queue,&vidq->active);
 761                         buf->vb.state = STATE_ACTIVE;
 762                         dprintk(2,"[%p/%d] buffer_queue - append to active\n",
 763                                 buf, buf->vb.i);
 764
 765                 } else {
 766                         list_add_tail(&buf->vb.queue,&vidq->queued);
 767                         buf->vb.state = STATE_QUEUED;
 768                         dprintk(2,"[%p/%d] buffer_queue - first queued\n",
 769                                 buf, buf->vb.i);
 770                 }
 771         }
 772 }
 773
 774 static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 775 {
 776         struct vivi_buffer   *buf  = container_of(vb,struct vivi_buffer,vb);
 777         struct vivi_fh       *fh   = vq->priv_data;
 778         struct vivi_dev      *dev  = (struct vivi_dev*)fh->dev;
 779         struct vivi_dmaqueue *vidq = &dev->vidq;
 780
 781         dprintk(1,"%s\n",__FUNCTION__);
 782
 783         vivi_stop_thread(vidq);
 784
 785         free_buffer(vq,buf);
 786 }
 787
 788 int vivi_map_sg (void *dev, struct scatterlist *sg, int nents,
 789            int direction)
 790 {
 791         int i;
 792
 793         dprintk(1,"%s, number of pages=%d\n",__FUNCTION__,nents);
 794         BUG_ON(direction == DMA_NONE);
 795
 796         for (i = 0; i < nents; i++ ) {
 797                 BUG_ON(!sg[i].page);
 798
 799                 sg[i].dma_address = page_to_phys(sg[i].page) + sg[i].offset;
 800         }
 801
 802         return nents;
 803 }
 804
 805 int vivi_unmap_sg(void *dev,struct scatterlist *sglist,int nr_pages,
 806                                         int direction)
 807 {
 808         dprintk(1,"%s\n",__FUNCTION__);
 809         return 0;
 810 }
 811
 812 int vivi_dma_sync_sg(void *dev,struct scatterlist *sglist,int nr_pages,
 813                                         int direction)
 814 {
 815 //      dprintk(1,"%s\n",__FUNCTION__);
 816
 817 //      flush_write_buffers();
 818         return 0;
 819 }
 820
 821 static struct videobuf_queue_ops vivi_video_qops = {
 822         .buf_setup      = buffer_setup,
 823         .buf_prepare    = buffer_prepare,
 824         .buf_queue      = buffer_queue,
 825         .buf_release    = buffer_release,
 826
 827         /* Non-pci handling routines */
 828         .vb_map_sg      = vivi_map_sg,
 829         .vb_dma_sync_sg = vivi_dma_sync_sg,
 830         .vb_unmap_sg    = vivi_unmap_sg,
 831 };
 832
 833 /* ------------------------------------------------------------------
 834         IOCTL handling
 835    ------------------------------------------------------------------*/
 836
 837 static int vivi_try_fmt(struct vivi_dev *dev, struct vivi_fh *fh,
 838                         struct v4l2_format *f)
 839 {
 840         struct vivi_fmt *fmt;
 841         enum v4l2_field field;
 842         unsigned int maxw, maxh;
 843
 844         if (format.fourcc != f->fmt.pix.pixelformat) {
 845                 dprintk(1,"Fourcc format invalid.\n");
 846                 return -EINVAL;
 847         }
 848         fmt=&format;
 849
 850         field = f->fmt.pix.field;
 851
 852         if (field == V4L2_FIELD_ANY) {
 853 //              field=V4L2_FIELD_INTERLACED;
 854                 field=V4L2_FIELD_SEQ_TB;
 855         } else if (V4L2_FIELD_INTERLACED != field) {
 856                 dprintk(1,"Field type invalid.\n");
 857                 return -EINVAL;
 858         }
 859
 860         maxw  = norm_maxw();
 861         maxh  = norm_maxh();
 862
 863         f->fmt.pix.field = field;
 864         if (f->fmt.pix.height < 32)
 865                 f->fmt.pix.height = 32;
 866         if (f->fmt.pix.height > maxh)
 867                 f->fmt.pix.height = maxh;
 868         if (f->fmt.pix.width < 48)
 869                 f->fmt.pix.width = 48;
 870         if (f->fmt.pix.width > maxw)
 871                 f->fmt.pix.width = maxw;
 872         f->fmt.pix.width &= ~0x03;
 873         f->fmt.pix.bytesperline =
 874                 (f->fmt.pix.width * fmt->depth) >> 3;
 875         f->fmt.pix.sizeimage =
 876                 f->fmt.pix.height * f->fmt.pix.bytesperline;
 877
 878         return 0;
 879 }
 880
 881 static int res_get(struct vivi_dev *dev, struct vivi_fh *fh)
 882 {
 883         /* is it free? */
 884         down(&dev->lock);
 885         if (dev->resources) {
 886                 /* no, someone else uses it */
 887                 up(&dev->lock);
 888                 return 0;
 889         }
 890         /* it's free, grab it */
 891         dev->resources =1;
 892         dprintk(1,"res: get\n");
 893         up(&dev->lock);
 894         return 1;
 895 }
 896
 897 static inline int res_locked(struct vivi_dev *dev)
 898 {
 899         return (dev->resources);
 900 }
 901
 902 static void res_free(struct vivi_dev *dev, struct vivi_fh *fh)
 903 {
 904         down(&dev->lock);
 905         dev->resources = 0;
 906         dprintk(1,"res: put\n");
 907         up(&dev->lock);
 908 }
 909
 910 static int vivi_do_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg)
 911 {
 912         struct vivi_fh  *fh     = file->private_data;
 913         struct vivi_dev *dev    = fh->dev;
 914         int ret=0;
 915
 916         if (debug) {
 917                 if (_IOC_DIR(cmd) & _IOC_WRITE)
 918                         v4l_printk_ioctl_arg("vivi(w)",cmd, arg);
 919                 else if (!_IOC_DIR(cmd) & _IOC_READ) {
 920                         v4l_print_ioctl("vivi", cmd);
 921                 }
 922         }
 923
 924         switch(cmd) {
 925         /* --- capabilities ------------------------------------------ */
 926         case VIDIOC_QUERYCAP:
 927         {
 928                 struct v4l2_capability *cap = (struct v4l2_capability*)arg;
 929
 930                 memset(cap, 0, sizeof(*cap));
 931
 932                 strcpy(cap->driver, "vivi");
 933                 strcpy(cap->card, "vivi");
 934                 cap->version = VIVI_VERSION;
 935                 cap->capabilities =
 936                                         V4L2_CAP_VIDEO_CAPTURE |
 937                                         V4L2_CAP_STREAMING     |
 938                                         V4L2_CAP_READWRITE;
 939                 break;
 940         }
 941         /* --- capture ioctls ---------------------------------------- */
 942         case VIDIOC_ENUM_FMT:
 943         {
 944                 struct v4l2_fmtdesc *f = arg;
 945                 enum v4l2_buf_type type;
 946                 unsigned int index;
 947
 948                 index = f->index;
 949                 type  = f->type;
 950
 951                 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 952                         ret=-EINVAL;
 953                         break;
 954                 }
 955
 956                 switch (type) {
 957                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 958                         if (index > 0){
 959                                 ret=-EINVAL;
 960                                 break;
 961                         }
 962                         memset(f,0,sizeof(*f));
 963
 964                         f->index = index;
 965                         f->type  = type;
 966                         strlcpy(f->description,format.name,sizeof(f->description));
 967                         f->pixelformat = format.fourcc;
 968                         break;
 969                 default:
 970                         ret=-EINVAL;
 971                 }
 972                 break;
 973         }
 974         case VIDIOC_G_FMT:
 975         {
 976                 struct v4l2_format *f = (struct v4l2_format *)arg;
 977
 978                 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 979                         ret=-EINVAL;
 980                         break;
 981                 }
 982
 983                 memset(&f->fmt.pix,0,sizeof(f->fmt.pix));
 984                 f->fmt.pix.width        = fh->width;
 985                 f->fmt.pix.height       = fh->height;
 986                 f->fmt.pix.field        = fh->vb_vidq.field;
 987                 f->fmt.pix.pixelformat  = fh->fmt->fourcc;
 988                 f->fmt.pix.bytesperline =
 989                         (f->fmt.pix.width * fh->fmt->depth) >> 3;
 990                 f->fmt.pix.sizeimage =
 991                         f->fmt.pix.height * f->fmt.pix.bytesperline;
 992                 break;
 993         }
 994         case VIDIOC_S_FMT:
 995         {
 996                 struct v4l2_format *f = arg;
 997
 998                 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 999                         dprintk(1,"Only capture supported.\n");
1000                         ret=-EINVAL;
1001                         break;
1002                 }
1003
1004                 ret = vivi_try_fmt(dev,fh,f);
1005                 if (ret < 0)
1006                         break;
1007
1008                 fh->fmt           = &format;
1009                 fh->width         = f->fmt.pix.width;
1010                 fh->height        = f->fmt.pix.height;
1011                 fh->vb_vidq.field = f->fmt.pix.field;
1012                 fh->type          = f->type;
1013
1014                 break;
1015         }
1016         case VIDIOC_TRY_FMT:
1017         {
1018                 struct v4l2_format *f = arg;
1019                 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1020                         ret=-EINVAL;
1021                         break;
1022                 }
1023
1024                 ret=vivi_try_fmt(dev,fh,f);
1025                 break;
1026         }
1027         case VIDIOC_REQBUFS:
1028                 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1029                         ret=-EINVAL;
1030                         break;
1031                 }
1032                 ret=videobuf_reqbufs(&fh->vb_vidq, arg);
1033                 break;
1034         case VIDIOC_QUERYBUF:
1035                 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1036                         ret=-EINVAL;
1037                         break;
1038                 }
1039                 ret=videobuf_querybuf(&fh->vb_vidq, arg);
1040                 break;
1041         case VIDIOC_QBUF:
1042                 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1043                         ret=-EINVAL;
1044                         break;
1045                 }
1046                 ret=videobuf_qbuf(&fh->vb_vidq, arg);
1047                 break;
1048         case VIDIOC_DQBUF:
1049                 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1050                         ret=-EINVAL;
1051                         break;
1052                 }
1053                 ret=videobuf_dqbuf(&fh->vb_vidq, arg,
1054                                         file->f_flags & O_NONBLOCK);
1055                 break;
1056 #ifdef HAVE_V4L1
1057         /* --- streaming capture ------------------------------------- */
1058         case VIDIOCGMBUF:
1059         {
1060                 struct video_mbuf *mbuf = arg;
1061                 struct videobuf_queue *q=&fh->vb_vidq;
1062                 struct v4l2_requestbuffers req;
1063                 unsigned int i;
1064
1065                 memset(&req,0,sizeof(req));
1066                 req.type   = q->type;
1067                 req.count  = 8;
1068                 req.memory = V4L2_MEMORY_MMAP;
1069                 ret = videobuf_reqbufs(q,&req);
1070                 if (ret < 0)
1071                         break;
1072                 memset(mbuf,0,sizeof(*mbuf));
1073                 mbuf->frames = req.count;
1074                 mbuf->size   = 0;
1075                 for (i = 0; i < mbuf->frames; i++) {
1076                         mbuf->offsets[i]  = q->bufs[i]->boff;
1077                         mbuf->size       += q->bufs[i]->bsize;
1078                 }
1079                 break;
1080         }
1081 #endif
1082         case VIDIOC_STREAMON:
1083         {
1084                 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1085                         return -EINVAL;
1086                 if (!res_get(dev,fh))
1087                         return -EBUSY;
1088                 ret=videobuf_streamon(&fh->vb_vidq);
1089                 break;
1090         }
1091         case VIDIOC_STREAMOFF:
1092         {
1093                 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1094                         ret=-EINVAL;
1095                         break;
1096                 }
1097                 ret = videobuf_streamoff(&fh->vb_vidq);
1098                 if (ret < 0)
1099                         break;
1100                 res_free(dev,fh);
1101                 break;
1102         }
1103         /* ---------- tv norms ---------- */
1104         case VIDIOC_ENUMSTD:
1105         {
1106                 struct v4l2_standard *e = arg;
1107
1108                 if (e->index>0) {
1109                         ret=-EINVAL;
1110                         break;
1111                 }
1112                 ret = v4l2_video_std_construct(e, V4L2_STD_NTSC_M, "NTSC-M");
1113
1114                 /* Allows vivi to use different fps from video std */
1115                 e->frameperiod.numerator = WAKE_NUMERATOR;
1116                 e->frameperiod.denominator = WAKE_DENOMINATOR;
1117
1118                 break;
1119         }
1120         case VIDIOC_G_STD:
1121         {
1122                 v4l2_std_id *id = arg;
1123
1124                 *id = V4L2_STD_NTSC_M;
1125                 break;
1126         }
1127         case VIDIOC_S_STD:
1128         {
1129                 break;
1130         }
1131         /* ------ input switching ---------- */
1132         case VIDIOC_ENUMINPUT:
1133         { /* only one input in this sample driver */
1134                 struct v4l2_input *inp = arg;
1135
1136                 if (inp->index != 0) {
1137                         ret=-EINVAL;
1138                         break;
1139                 }
1140                 memset(inp, 0, sizeof(*inp));
1141
1142                 inp->index = 0;
1143                 inp->type = V4L2_INPUT_TYPE_CAMERA;
1144                 inp->std = V4L2_STD_NTSC_M;
1145                 strcpy(inp->name,"Camera");
1146                 break;
1147         }
1148         case VIDIOC_G_INPUT:
1149         {
1150                 unsigned int *i = arg;
1151
1152                 *i = 0;
1153                 break;
1154         }
1155         case VIDIOC_S_INPUT:
1156         {
1157                 unsigned int *i = arg;
1158
1159                 if (*i > 0)
1160                         ret=-EINVAL;
1161                 break;
1162         }
1163
1164         /* --- controls ---------------------------------------------- */
1165         case VIDIOC_QUERYCTRL:
1166         {
1167                 struct v4l2_queryctrl *qc = arg;
1168                 int i;
1169
1170                 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1171                         if (qc->id && qc->id == vivi_qctrl[i].id) {
1172                                 memcpy(qc, &(vivi_qctrl[i]),
1173                                         sizeof(*qc));
1174                                 break;
1175                         }
1176
1177                 ret=-EINVAL;
1178                 break;
1179         }
1180         case VIDIOC_G_CTRL:
1181         {
1182                 struct v4l2_control *ctrl = arg;
1183                 int i;
1184
1185                 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1186                         if (ctrl->id == vivi_qctrl[i].id) {
1187                                 ctrl->value=qctl_regs[i];
1188                                 break;
1189                         }
1190
1191                 ret=-EINVAL;
1192                 break;
1193         }
1194         case VIDIOC_S_CTRL:
1195         {
1196                 struct v4l2_control *ctrl = arg;
1197                 int i;
1198                 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1199                         if (ctrl->id == vivi_qctrl[i].id) {
1200                                 if (ctrl->value <
1201                                         vivi_qctrl[i].minimum
1202                                         || ctrl->value >
1203                                         vivi_qctrl[i].maximum) {
1204                                                 ret=-ERANGE;
1205                                                 break;
1206                                         }
1207                                 qctl_regs[i]=ctrl->value;
1208                                 break;
1209                         }
1210                 ret=-EINVAL;
1211                 break;
1212         }
1213         default:
1214                 ret=v4l_compat_translate_ioctl(inode,file,cmd,arg,vivi_do_ioctl);
1215         }
1216
1217         if (debug) {
1218                 if (ret<0) {
1219                         v4l_print_ioctl("vivi(err)", cmd);
1220                         dprintk(1,"errcode=%d\n",ret);
1221                 } else if (_IOC_DIR(cmd) & _IOC_READ)
1222                         v4l_printk_ioctl_arg("vivi(r)",cmd, arg);
1223         }
1224
1225         return ret;
1226 }
1227
1228 static int vivi_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1229 {
1230         return video_usercopy(inode, file, cmd, arg, vivi_do_ioctl);
1231 }
1232
1233 /* ------------------------------------------------------------------
1234         File operations for the device
1235    ------------------------------------------------------------------*/
1236
1237 #define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
1238
1239 static int vivi_open(struct inode *inode, struct file *file)
1240 {
1241         int minor = iminor(inode);
1242         struct vivi_dev *h,*dev = NULL;
1243         struct vivi_fh *fh;
1244         struct list_head *list;
1245         enum v4l2_buf_type type = 0;
1246         int i;
1247
1248         printk(KERN_DEBUG "vivi: open called (minor=%d)\n",minor);
1249
1250         list_for_each(list,&vivi_devlist) {
1251                 h = list_entry(list, struct vivi_dev, vivi_devlist);
1252                 if (h->video_dev.minor == minor) {
1253                         dev  = h;
1254                         type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1255                 }
1256         }
1257         if (NULL == dev)
1258                 return -ENODEV;
1259
1260
1261         /* If more than one user, mutex should be added */
1262         dev->users++;
1263
1264         dprintk(1,"open minor=%d type=%s users=%d\n",
1265                                 minor,v4l2_type_names[type],dev->users);
1266
1267         /* allocate + initialize per filehandle data */
1268         fh = kzalloc(sizeof(*fh),GFP_KERNEL);
1269         if (NULL == fh) {
1270                 dev->users--;
1271                 return -ENOMEM;
1272         }
1273
1274         file->private_data = fh;
1275         fh->dev      = dev;
1276         fh->type     = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1277         fh->fmt      = &format;
1278         fh->width    = 640;
1279         fh->height   = 480;
1280
1281         /* Put all controls at a sane state */
1282         for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1283                 qctl_regs[i] =vivi_qctrl[i].default_value;
1284
1285         dprintk(1,"Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1286                 (unsigned long)fh,(unsigned long)dev,(unsigned long)&dev->vidq);
1287         dprintk(1,"Open: list_empty queued=%d\n",list_empty(&dev->vidq.queued));
1288         dprintk(1,"Open: list_empty active=%d\n",list_empty(&dev->vidq.active));
1289
1290         /* Resets frame counters */
1291         dev->h=0;
1292         dev->m=0;
1293         dev->s=0;
1294         dev->us=0;
1295         dev->jiffies=jiffies;
1296         sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
1297                         dev->h,dev->m,dev->s,(dev->us+500)/1000);
1298
1299         videobuf_queue_init(&fh->vb_vidq, &vivi_video_qops,
1300                         NULL, NULL,
1301                         fh->type,
1302                         V4L2_FIELD_INTERLACED,
1303                         sizeof(struct vivi_buffer),fh);
1304
1305         return 0;
1306 }
1307
1308 static ssize_t
1309 vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1310 {
1311         struct vivi_fh *fh = file->private_data;
1312
1313         if (fh->type==V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1314                 if (res_locked(fh->dev))
1315                         return -EBUSY;
1316                 return videobuf_read_one(&fh->vb_vidq, data, count, ppos,
1317                                         file->f_flags & O_NONBLOCK);
1318         }
1319         return 0;
1320 }
1321
1322 static unsigned int
1323 vivi_poll(struct file *file, struct poll_table_struct *wait)
1324 {
1325         struct vivi_fh *fh = file->private_data;
1326         struct vivi_buffer *buf;
1327
1328         dprintk(1,"%s\n",__FUNCTION__);
1329
1330         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1331                 return POLLERR;
1332
1333         if (res_get(fh->dev,fh)) {
1334                 dprintk(1,"poll: mmap interface\n");
1335                 /* streaming capture */
1336                 if (list_empty(&fh->vb_vidq.stream))
1337                         return POLLERR;
1338                 buf = list_entry(fh->vb_vidq.stream.next,struct vivi_buffer,vb.stream);
1339         } else {
1340                 dprintk(1,"poll: read() interface\n");
1341                 /* read() capture */
1342                 buf = (struct vivi_buffer*)fh->vb_vidq.read_buf;
1343                 if (NULL == buf)
1344                         return POLLERR;
1345         }
1346         poll_wait(file, &buf->vb.done, wait);
1347         if (buf->vb.state == STATE_DONE ||
1348             buf->vb.state == STATE_ERROR)
1349                 return POLLIN|POLLRDNORM;
1350         return 0;
1351 }
1352
1353 static int vivi_release(struct inode *inode, struct file *file)
1354 {
1355         struct vivi_fh  *fh     = file->private_data;
1356         struct vivi_dev *dev    = fh->dev;
1357         struct vivi_dmaqueue *vidq = &dev->vidq;
1358
1359         int minor = iminor(inode);
1360
1361         vivi_stop_thread(vidq);
1362         videobuf_mmap_free(&fh->vb_vidq);
1363
1364         kfree (fh);
1365
1366         dev->users--;
1367
1368         printk(KERN_DEBUG "vivi: close called (minor=%d, users=%d)\n",minor,dev->users);
1369
1370         return 0;
1371 }
1372
1373 static int
1374 vivi_mmap(struct file *file, struct vm_area_struct * vma)
1375 {
1376         struct vivi_fh *fh = file->private_data;
1377         int ret;
1378
1379         dprintk (1,"mmap called, vma=0x%08lx\n",(unsigned long)vma);
1380
1381         ret=videobuf_mmap_mapper(&fh->vb_vidq, vma);
1382
1383         dprintk (1,"vma start=0x%08lx, size=%ld, ret=%d\n",
1384                 (unsigned long)vma->vm_start,
1385                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1386                 ret);
1387
1388         return ret;
1389 }
1390
1391 static struct file_operations vivi_fops = {
1392         .owner          = THIS_MODULE,
1393         .open           = vivi_open,
1394         .release        = vivi_release,
1395         .read           = vivi_read,
1396         .poll           = vivi_poll,
1397         .ioctl          = vivi_ioctl,
1398         .mmap           = vivi_mmap,
1399         .llseek         = no_llseek,
1400 };
1401
1402 static struct video_device vivi = {
1403         .name           = "VTM Virtual Video Capture Board",
1404         .type           = VID_TYPE_CAPTURE,
1405         .hardware       = 0,
1406         .fops           = &vivi_fops,
1407         .minor          = -1,
1408 //      .release        = video_device_release,
1409 };
1410 /* ------------------------------------------------------------------
1411         Initialization and module stuff
1412    ------------------------------------------------------------------*/
1413
1414 static int __init vivi_init(void)
1415 {
1416         int ret;
1417         struct vivi_dev *dev;
1418
1419         dev = kzalloc(sizeof(*dev),GFP_KERNEL);
1420         if (NULL == dev)
1421                 return -ENOMEM;
1422         list_add_tail(&dev->vivi_devlist,&vivi_devlist);
1423
1424         /* init video dma queues */
1425         INIT_LIST_HEAD(&dev->vidq.active);
1426         INIT_LIST_HEAD(&dev->vidq.queued);
1427
1428         /* initialize locks */
1429         init_MUTEX(&dev->lock);
1430
1431         dev->vidq.timeout.function = vivi_vid_timeout;
1432         dev->vidq.timeout.data     = (unsigned long)dev;
1433         init_timer(&dev->vidq.timeout);
1434
1435         ret = video_register_device(&vivi, VFL_TYPE_GRABBER, video_nr);
1436         printk(KERN_INFO "Video Technology Magazine Virtual Video Capture Board (Load status: %d)\n", ret);
1437         return ret;
1438 }
1439
1440 static void __exit vivi_exit(void)
1441 {
1442         struct vivi_dev *h;
1443         struct list_head *list;
1444
1445         list_for_each(list,&vivi_devlist) {
1446                 h = list_entry(list, struct vivi_dev, vivi_devlist);
1447                 kfree (h);
1448         }
1449         video_unregister_device(&vivi);
1450 }
1451
1452 module_init(vivi_init);
1453 module_exit(vivi_exit);