git.oblomov.eu Git - linux-2.6/blob - drivers/media/video/vivi.c

   1 /*
   2  * Virtual Video driver - This code emulates a real video device with v4l2 api
   3  *
   4  * Copyright (c) 2006 by:
   5  *      Mauro Carvalho Chehab <mchehab--a.t--infradead.org>
   6  *      Ted Walther <ted--a.t--enumera.com>
   7  *      John Sokol <sokol--a.t--videotechnology.com>
   8  *      http://v4l.videotechnology.com/
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the BSD Licence, GNU General Public License
  12  * as published by the Free Software Foundation; either version 2 of the
  13  * License, or (at your option) any later version
  14  */
  15 #include <linux/module.h>
  16 #include <linux/delay.h>
  17 #include <linux/errno.h>
  18 #include <linux/fs.h>
  19 #include <linux/kernel.h>
  20 #include <linux/slab.h>
  21 #include <linux/mm.h>
  22 #include <linux/ioport.h>
  23 #include <linux/init.h>
  24 #include <linux/sched.h>
  25 #include <linux/pci.h>
  26 #include <linux/random.h>
  27 #include <linux/version.h>
  28 #include <linux/videodev2.h>
  29 #include <linux/dma-mapping.h>
  30 #ifdef CONFIG_VIDEO_V4L1_COMPAT
  31 /* Include V4L1 specific functions. Should be removed soon */
  32 #include <linux/videodev.h>
  33 #endif
  34 #include <linux/interrupt.h>
  35 #include <media/video-buf.h>
  36 #include <media/v4l2-common.h>
  37 #include <linux/kthread.h>
  38 #include <linux/highmem.h>
  39
  40 /* Wake up at about 30 fps */
  41 #define WAKE_NUMERATOR 30
  42 #define WAKE_DENOMINATOR 1001
  43 #define BUFFER_TIMEOUT     msecs_to_jiffies(500)  /* 0.5 seconds */
  44
  45 /* These timers are for 1 fps - used only for testing */
  46 //#define WAKE_DENOMINATOR 30 /* hack for testing purposes */
  47 //#define BUFFER_TIMEOUT     msecs_to_jiffies(5000)  /* 5 seconds */
  48
  49 #include "font.h"
  50
  51 #ifndef kzalloc
  52 #define kzalloc(size, flags)                            \
  53 ({                                                      \
  54         void *__ret = kmalloc(size, flags);             \
  55         if (__ret)                                      \
  56                 memset(__ret, 0, size);                 \
  57         __ret;                                          \
  58 })
  59 #endif
  60
  61 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
  62 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
  63 MODULE_LICENSE("Dual BSD/GPL");
  64
  65 #define VIVI_MAJOR_VERSION 0
  66 #define VIVI_MINOR_VERSION 4
  67 #define VIVI_RELEASE 0
  68 #define VIVI_VERSION KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE)
  69
  70 static int video_nr = -1;        /* /dev/videoN, -1 for autodetect */
  71 module_param(video_nr, int, 0);
  72
  73 static int debug = 0;
  74 module_param(debug, int, 0);
  75
  76 static unsigned int vid_limit = 16;
  77 module_param(vid_limit,int,0644);
  78 MODULE_PARM_DESC(vid_limit,"capture memory limit in megabytes");
  79
  80 /* supported controls */
  81 static struct v4l2_queryctrl vivi_qctrl[] = {
  82         {
  83                 .id            = V4L2_CID_AUDIO_VOLUME,
  84                 .name          = "Volume",
  85                 .minimum       = 0,
  86                 .maximum       = 65535,
  87                 .step          = 65535/100,
  88                 .default_value = 65535,
  89                 .flags         = 0,
  90                 .type          = V4L2_CTRL_TYPE_INTEGER,
  91         },{
  92                 .id            = V4L2_CID_BRIGHTNESS,
  93                 .type          = V4L2_CTRL_TYPE_INTEGER,
  94                 .name          = "Brightness",
  95                 .minimum       = 0,
  96                 .maximum       = 255,
  97                 .step          = 1,
  98                 .default_value = 127,
  99                 .flags         = 0,
 100         }, {
 101                 .id            = V4L2_CID_CONTRAST,
 102                 .type          = V4L2_CTRL_TYPE_INTEGER,
 103                 .name          = "Contrast",
 104                 .minimum       = 0,
 105                 .maximum       = 255,
 106                 .step          = 0x1,
 107                 .default_value = 0x10,
 108                 .flags         = 0,
 109         }, {
 110                 .id            = V4L2_CID_SATURATION,
 111                 .type          = V4L2_CTRL_TYPE_INTEGER,
 112                 .name          = "Saturation",
 113                 .minimum       = 0,
 114                 .maximum       = 255,
 115                 .step          = 0x1,
 116                 .default_value = 127,
 117                 .flags         = 0,
 118         }, {
 119                 .id            = V4L2_CID_HUE,
 120                 .type          = V4L2_CTRL_TYPE_INTEGER,
 121                 .name          = "Hue",
 122                 .minimum       = -128,
 123                 .maximum       = 127,
 124                 .step          = 0x1,
 125                 .default_value = 0,
 126                 .flags         = 0,
 127         }
 128 };
 129
 130 static int qctl_regs[ARRAY_SIZE(vivi_qctrl)];
 131
 132 #define dprintk(level,fmt, arg...)                           \
 133         do {                                                 \
 134                 if (debug >= (level))                        \
 135                         printk(KERN_DEBUG "vivi: " fmt , ## arg);    \
 136         } while (0)
 137
 138 /* ------------------------------------------------------------------
 139         Basic structures
 140    ------------------------------------------------------------------*/
 141
 142 struct vivi_fmt {
 143         char  *name;
 144         u32   fourcc;          /* v4l2 format id */
 145         int   depth;
 146 };
 147
 148 static struct vivi_fmt format = {
 149         .name     = "4:2:2, packed, YUYV",
 150         .fourcc   = V4L2_PIX_FMT_YUYV,
 151         .depth    = 16,
 152 };
 153
 154 struct sg_to_addr {
 155         int pos;
 156         struct scatterlist *sg;
 157 };
 158
 159 /* buffer for one video frame */
 160 struct vivi_buffer {
 161         /* common v4l buffer stuff -- must be first */
 162         struct videobuf_buffer vb;
 163
 164         struct vivi_fmt        *fmt;
 165
 166         struct sg_to_addr      *to_addr;
 167 };
 168
 169 struct vivi_dmaqueue {
 170         struct list_head       active;
 171         struct list_head       queued;
 172         struct timer_list      timeout;
 173
 174         /* thread for generating video stream*/
 175         struct task_struct         *kthread;
 176         wait_queue_head_t          wq;
 177         /* Counters to control fps rate */
 178         int                        frame;
 179         int                        ini_jiffies;
 180 };
 181
 182 static LIST_HEAD(vivi_devlist);
 183
 184 struct vivi_dev {
 185         struct list_head           vivi_devlist;
 186
 187         struct semaphore           lock;
 188
 189         int                        users;
 190
 191         /* various device info */
 192         unsigned int               resources;
 193         struct video_device        video_dev;
 194
 195         struct vivi_dmaqueue       vidq;
 196
 197         /* Several counters */
 198         int                        h,m,s,us,jiffies;
 199         char                       timestr[13];
 200 };
 201
 202 struct vivi_fh {
 203         struct vivi_dev            *dev;
 204
 205         /* video capture */
 206         struct vivi_fmt            *fmt;
 207         unsigned int               width,height;
 208         struct videobuf_queue      vb_vidq;
 209
 210         enum v4l2_buf_type         type;
 211 };
 212
 213 /* ------------------------------------------------------------------
 214         DMA and thread functions
 215    ------------------------------------------------------------------*/
 216
 217 /* Bars and Colors should match positions */
 218
 219 enum colors {
 220         WHITE,
 221         AMBAR,
 222         CYAN,
 223         GREEN,
 224         MAGENTA,
 225         RED,
 226         BLUE
 227 };
 228
 229 static u8 bars[8][3] = {
 230         /* R   G   B */
 231         {204,204,204},  /* white */
 232         {208,208,  0},  /* ambar */
 233         {  0,206,206},  /* cyan */
 234         {  0,239,  0},  /* green */
 235         {239,  0,239},  /* magenta */
 236         {205,  0,  0},  /* red */
 237         {  0,  0,255},  /* blue */
 238         {  0,  0,  0}
 239 };
 240
 241 #define TO_Y(r,g,b) (((16829*r +33039*g +6416*b  + 32768)>>16)+16)
 242 /* RGB to  V(Cr) Color transform */
 243 #define TO_V(r,g,b) (((28784*r -24103*g -4681*b  + 32768)>>16)+128)
 244 /* RGB to  U(Cb) Color transform */
 245 #define TO_U(r,g,b) (((-9714*r -19070*g +28784*b + 32768)>>16)+128)
 246
 247 #define TSTAMP_MIN_Y 24
 248 #define TSTAMP_MAX_Y TSTAMP_MIN_Y+15
 249 #define TSTAMP_MIN_X 64
 250
 251 void prep_to_addr(struct sg_to_addr to_addr[],struct videobuf_buffer *vb)
 252 {
 253         int i, pos=0;
 254
 255         for (i=0;i<vb->dma.nr_pages;i++) {
 256                 to_addr[i].sg=&vb->dma.sglist[i];
 257                 to_addr[i].pos=pos;
 258                 pos += vb->dma.sglist[i].length;
 259         }
 260 }
 261
 262 inline int get_addr_pos(int pos, int pages, struct sg_to_addr to_addr[])
 263 {
 264         int p1=0,p2=pages-1,p3=pages/2;
 265
 266         /* Sanity test */
 267         BUG_ON (pos>=to_addr[p2].pos+to_addr[p2].sg->length);
 268
 269         while (p1+1<p2) {
 270                 if (pos < to_addr[p3].pos) {
 271                         p2=p3;
 272                 } else {
 273                         p1=p3;
 274                 }
 275                 p3=(p1+p2)/2;
 276         }
 277         if (pos >= to_addr[p2].pos)
 278                 p1=p2;
 279
 280         return (p1);
 281 }
 282
 283 void gen_line(struct sg_to_addr to_addr[],int inipos,int pages,int wmax,
 284                                         int hmax, int line, char *timestr)
 285 {
 286         int  w,i,j,pos=inipos,pgpos,oldpg,y;
 287         char *p,*s,*basep;
 288         struct page *pg;
 289         u8   chr,r,g,b,color;
 290
 291         /* Get first addr pointed to pixel position */
 292         oldpg=get_addr_pos(pos,pages,to_addr);
 293         pg=pfn_to_page(to_addr[oldpg].sg->dma_address >> PAGE_SHIFT);
 294         basep = kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[oldpg].sg->offset;
 295
 296         /* We will just duplicate the second pixel at the packet */
 297         wmax/=2;
 298
 299         /* Generate a standard color bar pattern */
 300         for (w=0;w<wmax;w++) {
 301                 r=bars[w*7/wmax][0];
 302                 g=bars[w*7/wmax][1];
 303                 b=bars[w*7/wmax][2];
 304
 305                 for (color=0;color<4;color++) {
 306                         pgpos=get_addr_pos(pos,pages,to_addr);
 307                         if (pgpos!=oldpg) {
 308                                 pg=pfn_to_page(to_addr[pgpos].sg->dma_address >> PAGE_SHIFT);
 309                                 kunmap_atomic(basep, KM_BOUNCE_READ);
 310                                 basep= kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[pgpos].sg->offset;
 311                                 oldpg=pgpos;
 312                         }
 313                         p=basep+pos-to_addr[pgpos].pos;
 314
 315                         switch (color) {
 316                                 case 0:
 317                                 case 2:
 318                                         *p=TO_Y(r,g,b);         /* Luminance */
 319                                         break;
 320                                 case 1:
 321                                         *p=TO_U(r,g,b);         /* Cb */
 322                                         break;
 323                                 case 3:
 324                                         *p=TO_V(r,g,b);         /* Cr */
 325                                         break;
 326                         }
 327                         pos++;
 328                 }
 329         }
 330
 331         /* Checks if it is possible to show timestamp */
 332         if (TSTAMP_MAX_Y>=hmax)
 333                 goto end;
 334         if (TSTAMP_MIN_X+strlen(timestr)>=wmax)
 335                 goto end;
 336
 337         /* Print stream time */
 338         if (line>=TSTAMP_MIN_Y && line<=TSTAMP_MAX_Y) {
 339                 j=TSTAMP_MIN_X;
 340                 for (s=timestr;*s;s++) {
 341                         chr=rom8x16_bits[(*s-0x30)*16+line-TSTAMP_MIN_Y];
 342                         for (i=0;i<7;i++) {
 343                                 if (chr&1<<(7-i)) { /* Font color*/
 344                                         r=bars[BLUE][0];
 345                                         g=bars[BLUE][1];
 346                                         b=bars[BLUE][2];
 347                                         r=g=b=0;
 348                                         g=198;
 349                                 } else { /* Background color */
 350                                         r=bars[WHITE][0];
 351                                         g=bars[WHITE][1];
 352                                         b=bars[WHITE][2];
 353                                         r=g=b=0;
 354                                 }
 355
 356                                 pos=inipos+j*2;
 357                                 for (color=0;color<4;color++) {
 358                                         pgpos=get_addr_pos(pos,pages,to_addr);
 359                                         if (pgpos!=oldpg) {
 360                                                 pg=pfn_to_page(to_addr[pgpos].
 361                                                                 sg->dma_address
 362                                                                 >> PAGE_SHIFT);
 363                                                 kunmap_atomic(basep,
 364                                                                 KM_BOUNCE_READ);
 365                                                 basep= kmap_atomic(pg,
 366                                                         KM_BOUNCE_READ)+
 367                                                         to_addr[pgpos].sg->offset;
 368                                                 oldpg=pgpos;
 369                                         }
 370                                         p=basep+pos-to_addr[pgpos].pos;
 371
 372                                         y=TO_Y(r,g,b);
 373
 374                                         switch (color) {
 375                                                 case 0:
 376                                                 case 2:
 377                                                         *p=TO_Y(r,g,b);         /* Luminance */
 378                                                         break;
 379                                                 case 1:
 380                                                         *p=TO_U(r,g,b);         /* Cb */
 381                                                         break;
 382                                                 case 3:
 383                                                         *p=TO_V(r,g,b);         /* Cr */
 384                                                         break;
 385                                         }
 386                                         pos++;
 387                                 }
 388                                 j++;
 389                         }
 390                 }
 391         }
 392
 393
 394 end:
 395         kunmap_atomic(basep, KM_BOUNCE_READ);
 396 }
 397 static void vivi_fillbuff(struct vivi_dev *dev,struct vivi_buffer *buf)
 398 {
 399         int h,pos=0;
 400         int hmax  = buf->vb.height;
 401         int wmax  = buf->vb.width;
 402         struct videobuf_buffer *vb=&buf->vb;
 403         struct sg_to_addr *to_addr=buf->to_addr;
 404         struct timeval ts;
 405
 406         /* Test if DMA mapping is ready */
 407         if (!vb->dma.sglist[0].dma_address)
 408                 return;
 409
 410         prep_to_addr(to_addr,vb);
 411
 412         /* Check if there is enough memory */
 413         BUG_ON(buf->vb.dma.nr_pages << PAGE_SHIFT < (buf->vb.width*buf->vb.height)*2);
 414
 415         for (h=0;h<hmax;h++) {
 416                 gen_line(to_addr,pos,vb->dma.nr_pages,wmax,hmax,h,dev->timestr);
 417                 pos += wmax*2;
 418         }
 419
 420         /* Updates stream time */
 421
 422         dev->us+=jiffies_to_usecs(jiffies-dev->jiffies);
 423         dev->jiffies=jiffies;
 424         if (dev->us>=1000000) {
 425                 dev->us-=1000000;
 426                 dev->s++;
 427                 if (dev->s>=60) {
 428                         dev->s-=60;
 429                         dev->m++;
 430                         if (dev->m>60) {
 431                                 dev->m-=60;
 432                                 dev->h++;
 433                                 if (dev->h>24)
 434                                         dev->h-=24;
 435                         }
 436                 }
 437         }
 438         sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
 439                         dev->h,dev->m,dev->s,(dev->us+500)/1000);
 440
 441         dprintk(2,"vivifill at %s: Buffer 0x%08lx size= %d\n",dev->timestr,
 442                         (unsigned long)buf->vb.dma.vmalloc,pos);
 443
 444         /* Advice that buffer was filled */
 445         buf->vb.state = STATE_DONE;
 446         buf->vb.field_count++;
 447         do_gettimeofday(&ts);
 448         buf->vb.ts = ts;
 449
 450         list_del(&buf->vb.queue);
 451         wake_up(&buf->vb.done);
 452 }
 453
 454 static int restart_video_queue(struct vivi_dmaqueue *dma_q);
 455
 456 static void vivi_thread_tick(struct vivi_dmaqueue  *dma_q)
 457 {
 458         struct vivi_buffer    *buf;
 459         struct vivi_dev *dev= container_of(dma_q,struct vivi_dev,vidq);
 460
 461         int bc;
 462
 463         /* Announces videobuf that all went ok */
 464         for (bc = 0;; bc++) {
 465                 if (list_empty(&dma_q->active)) {
 466                         dprintk(1,"No active queue to serve\n");
 467                         break;
 468                 }
 469
 470                 buf = list_entry(dma_q->active.next,
 471                                  struct vivi_buffer, vb.queue);
 472
 473                 /* Nobody is waiting something to be done, just return */
 474                 if (!waitqueue_active(&buf->vb.done)) {
 475                         mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 476                         return;
 477                 }
 478
 479                 do_gettimeofday(&buf->vb.ts);
 480                 dprintk(2,"[%p/%d] wakeup\n",buf,buf->vb.i);
 481
 482                 /* Fill buffer */
 483                 vivi_fillbuff(dev,buf);
 484         }
 485         if (list_empty(&dma_q->active)) {
 486                 del_timer(&dma_q->timeout);
 487         } else {
 488                 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 489         }
 490         if (bc != 1)
 491                 dprintk(1,"%s: %d buffers handled (should be 1)\n",__FUNCTION__,bc);
 492 }
 493
 494 void vivi_sleep(struct vivi_dmaqueue  *dma_q)
 495 {
 496         int timeout;
 497         DECLARE_WAITQUEUE(wait, current);
 498
 499         dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
 500
 501         add_wait_queue(&dma_q->wq, &wait);
 502         if (!kthread_should_stop()) {
 503                 dma_q->frame++;
 504
 505                 /* Calculate time to wake up */
 506                 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
 507
 508                 if (timeout <= 0) {
 509                         int old=dma_q->frame;
 510                         dma_q->frame=(jiffies_to_msecs(jiffies-dma_q->ini_jiffies)*WAKE_DENOMINATOR)/(WAKE_NUMERATOR*1000)+1;
 511
 512                         timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
 513
 514                         dprintk(1,"underrun, losed %d frames. "
 515                                   "Now, frame is %d. Waking on %d jiffies\n",
 516                                         dma_q->frame-old,dma_q->frame,timeout);
 517                 } else
 518                         dprintk(1,"will sleep for %i jiffies\n",timeout);
 519
 520                 vivi_thread_tick(dma_q);
 521
 522                 schedule_timeout_interruptible (timeout);
 523         }
 524
 525         remove_wait_queue(&dma_q->wq, &wait);
 526         try_to_freeze();
 527 }
 528
 529 int vivi_thread(void *data)
 530 {
 531         struct vivi_dmaqueue  *dma_q=data;
 532
 533         dprintk(1,"thread started\n");
 534
 535         for (;;) {
 536                 vivi_sleep(dma_q);
 537
 538                 if (kthread_should_stop())
 539                         break;
 540         }
 541         dprintk(1, "thread: exit\n");
 542         return 0;
 543 }
 544
 545 int vivi_start_thread(struct vivi_dmaqueue  *dma_q)
 546 {
 547         dma_q->frame=0;
 548         dma_q->ini_jiffies=jiffies;
 549
 550         dprintk(1,"%s\n",__FUNCTION__);
 551         init_waitqueue_head(&dma_q->wq);
 552
 553         dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi");
 554
 555         if (dma_q->kthread == NULL) {
 556                 printk(KERN_ERR "vivi: kernel_thread() failed\n");
 557                 return -EINVAL;
 558         }
 559         dprintk(1,"returning from %s\n",__FUNCTION__);
 560         return 0;
 561 }
 562
 563 void vivi_stop_thread(struct vivi_dmaqueue  *dma_q)
 564 {
 565         dprintk(1,"%s\n",__FUNCTION__);
 566         /* shutdown control thread */
 567         if (dma_q->kthread) {
 568                 kthread_stop(dma_q->kthread);
 569                 dma_q->kthread=NULL;
 570         }
 571 }
 572
 573 static int restart_video_queue(struct vivi_dmaqueue *dma_q)
 574 {
 575         struct vivi_buffer *buf, *prev;
 576         struct list_head *item;
 577
 578         dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
 579
 580         if (!list_empty(&dma_q->active)) {
 581                 buf = list_entry(dma_q->active.next, struct vivi_buffer, vb.queue);
 582                 dprintk(2,"restart_queue [%p/%d]: restart dma\n",
 583                         buf, buf->vb.i);
 584
 585                 dprintk(1,"Restarting video dma\n");
 586                 vivi_stop_thread(dma_q);
 587 //              vivi_start_thread(dma_q);
 588
 589                 /* cancel all outstanding capture / vbi requests */
 590                 list_for_each(item,&dma_q->active) {
 591                         buf = list_entry(item, struct vivi_buffer, vb.queue);
 592
 593                         list_del(&buf->vb.queue);
 594                         buf->vb.state = STATE_ERROR;
 595                         wake_up(&buf->vb.done);
 596                 }
 597                 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 598
 599                 return 0;
 600         }
 601
 602         prev = NULL;
 603         for (;;) {
 604                 if (list_empty(&dma_q->queued))
 605                         return 0;
 606                 buf = list_entry(dma_q->queued.next, struct vivi_buffer, vb.queue);
 607                 if (NULL == prev) {
 608                         list_del(&buf->vb.queue);
 609                         list_add_tail(&buf->vb.queue,&dma_q->active);
 610
 611                         dprintk(1,"Restarting video dma\n");
 612                         vivi_stop_thread(dma_q);
 613                         vivi_start_thread(dma_q);
 614
 615                         buf->vb.state = STATE_ACTIVE;
 616                         mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
 617                         dprintk(2,"[%p/%d] restart_queue - first active\n",
 618                                 buf,buf->vb.i);
 619
 620                 } else if (prev->vb.width  == buf->vb.width  &&
 621                            prev->vb.height == buf->vb.height &&
 622                            prev->fmt       == buf->fmt) {
 623                         list_del(&buf->vb.queue);
 624                         list_add_tail(&buf->vb.queue,&dma_q->active);
 625                         buf->vb.state = STATE_ACTIVE;
 626                         dprintk(2,"[%p/%d] restart_queue - move to active\n",
 627                                 buf,buf->vb.i);
 628                 } else {
 629                         return 0;
 630                 }
 631                 prev = buf;
 632         }
 633 }
 634
 635 static void vivi_vid_timeout(unsigned long data)
 636 {
 637         struct vivi_dev      *dev  = (struct vivi_dev*)data;
 638         struct vivi_dmaqueue *vidq = &dev->vidq;
 639         struct vivi_buffer   *buf;
 640
 641         while (!list_empty(&vidq->active)) {
 642                 buf = list_entry(vidq->active.next, struct vivi_buffer, vb.queue);
 643                 list_del(&buf->vb.queue);
 644                 buf->vb.state = STATE_ERROR;
 645                 wake_up(&buf->vb.done);
 646                 printk("vivi/0: [%p/%d] timeout\n", buf, buf->vb.i);
 647         }
 648
 649         restart_video_queue(vidq);
 650 }
 651
 652 /* ------------------------------------------------------------------
 653         Videobuf operations
 654    ------------------------------------------------------------------*/
 655 static int
 656 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
 657 {
 658         struct vivi_fh *fh = vq->priv_data;
 659
 660         *size = fh->width*fh->height*2;
 661
 662         if (0 == *count)
 663                 *count = 32;
 664         while (*size * *count > vid_limit * 1024 * 1024)
 665                 (*count)--;
 666         return 0;
 667 }
 668
 669 void
 670 free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
 671 {
 672         dprintk(1,"%s\n",__FUNCTION__);
 673
 674         if (in_interrupt())
 675                 BUG();
 676
 677         /*FIXME: Maybe a spinlock is required here */
 678         kfree(buf->to_addr);
 679         buf->to_addr=NULL;
 680
 681         videobuf_waiton(&buf->vb,0,0);
 682         videobuf_dma_unmap(vq, &buf->vb.dma);
 683         videobuf_dma_free(&buf->vb.dma);
 684         buf->vb.state = STATE_NEEDS_INIT;
 685 }
 686
 687 #define norm_maxw() 1024
 688 #define norm_maxh() 768
 689 static int
 690 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 691                                                 enum v4l2_field field)
 692 {
 693         struct vivi_fh     *fh  = vq->priv_data;
 694         struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
 695         int rc, init_buffer = 0;
 696
 697 //      dprintk(1,"%s, field=%d\n",__FUNCTION__,field);
 698
 699         BUG_ON(NULL == fh->fmt);
 700         if (fh->width  < 48 || fh->width  > norm_maxw() ||
 701             fh->height < 32 || fh->height > norm_maxh())
 702                 return -EINVAL;
 703         buf->vb.size = fh->width*fh->height*2;
 704         if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
 705                 return -EINVAL;
 706
 707         if (buf->fmt       != fh->fmt    ||
 708             buf->vb.width  != fh->width  ||
 709             buf->vb.height != fh->height ||
 710         buf->vb.field  != field) {
 711                 buf->fmt       = fh->fmt;
 712                 buf->vb.width  = fh->width;
 713                 buf->vb.height = fh->height;
 714                 buf->vb.field  = field;
 715                 init_buffer = 1;
 716         }
 717
 718         if (STATE_NEEDS_INIT == buf->vb.state) {
 719                 if (0 != (rc = videobuf_iolock(vq,&buf->vb,NULL)))
 720                         goto fail;
 721         }
 722
 723         buf->vb.state = STATE_PREPARED;
 724
 725         if (NULL == (buf->to_addr = kmalloc(sizeof(*buf->to_addr) * vb->dma.nr_pages,GFP_KERNEL))) {
 726                 rc=-ENOMEM;
 727                 goto fail;
 728         }
 729
 730         return 0;
 731
 732 fail:
 733         free_buffer(vq,buf);
 734         return rc;
 735 }
 736
 737 static void
 738 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 739 {
 740         struct vivi_buffer    *buf     = container_of(vb,struct vivi_buffer,vb);
 741         struct vivi_fh        *fh      = vq->priv_data;
 742         struct vivi_dev       *dev     = fh->dev;
 743         struct vivi_dmaqueue  *vidq    = &dev->vidq;
 744         struct vivi_buffer    *prev;
 745
 746         if (!list_empty(&vidq->queued)) {
 747                 dprintk(1,"adding vb queue=0x%08lx\n",(unsigned long)&buf->vb.queue);
 748                 list_add_tail(&buf->vb.queue,&vidq->queued);
 749                 buf->vb.state = STATE_QUEUED;
 750                 dprintk(2,"[%p/%d] buffer_queue - append to queued\n",
 751                         buf, buf->vb.i);
 752         } else if (list_empty(&vidq->active)) {
 753                 list_add_tail(&buf->vb.queue,&vidq->active);
 754
 755                 buf->vb.state = STATE_ACTIVE;
 756                 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
 757                 dprintk(2,"[%p/%d] buffer_queue - first active\n",
 758                         buf, buf->vb.i);
 759
 760                 vivi_start_thread(vidq);
 761         } else {
 762                 prev = list_entry(vidq->active.prev, struct vivi_buffer, vb.queue);
 763                 if (prev->vb.width  == buf->vb.width  &&
 764                     prev->vb.height == buf->vb.height &&
 765                     prev->fmt       == buf->fmt) {
 766                         list_add_tail(&buf->vb.queue,&vidq->active);
 767                         buf->vb.state = STATE_ACTIVE;
 768                         dprintk(2,"[%p/%d] buffer_queue - append to active\n",
 769                                 buf, buf->vb.i);
 770
 771                 } else {
 772                         list_add_tail(&buf->vb.queue,&vidq->queued);
 773                         buf->vb.state = STATE_QUEUED;
 774                         dprintk(2,"[%p/%d] buffer_queue - first queued\n",
 775                                 buf, buf->vb.i);
 776                 }
 777         }
 778 }
 779
 780 static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 781 {
 782         struct vivi_buffer   *buf  = container_of(vb,struct vivi_buffer,vb);
 783         struct vivi_fh       *fh   = vq->priv_data;
 784         struct vivi_dev      *dev  = (struct vivi_dev*)fh->dev;
 785         struct vivi_dmaqueue *vidq = &dev->vidq;
 786
 787         dprintk(1,"%s\n",__FUNCTION__);
 788
 789         vivi_stop_thread(vidq);
 790
 791         free_buffer(vq,buf);
 792 }
 793
 794 int vivi_map_sg (void *dev, struct scatterlist *sg, int nents,
 795            int direction)
 796 {
 797         int i;
 798
 799         dprintk(1,"%s, number of pages=%d\n",__FUNCTION__,nents);
 800         BUG_ON(direction == DMA_NONE);
 801
 802         for (i = 0; i < nents; i++ ) {
 803                 BUG_ON(!sg[i].page);
 804
 805                 sg[i].dma_address = page_to_phys(sg[i].page) + sg[i].offset;
 806         }
 807
 808         return nents;
 809 }
 810
 811 int vivi_unmap_sg(void *dev,struct scatterlist *sglist,int nr_pages,
 812                                         int direction)
 813 {
 814         dprintk(1,"%s\n",__FUNCTION__);
 815         return 0;
 816 }
 817
 818 int vivi_dma_sync_sg(void *dev,struct scatterlist *sglist,int nr_pages,
 819                                         int direction)
 820 {
 821 //      dprintk(1,"%s\n",__FUNCTION__);
 822
 823 //      flush_write_buffers();
 824         return 0;
 825 }
 826
 827 static struct videobuf_queue_ops vivi_video_qops = {
 828         .buf_setup      = buffer_setup,
 829         .buf_prepare    = buffer_prepare,
 830         .buf_queue      = buffer_queue,
 831         .buf_release    = buffer_release,
 832
 833         /* Non-pci handling routines */
 834         .vb_map_sg      = vivi_map_sg,
 835         .vb_dma_sync_sg = vivi_dma_sync_sg,
 836         .vb_unmap_sg    = vivi_unmap_sg,
 837 };
 838
 839 /* ------------------------------------------------------------------
 840         IOCTL handling
 841    ------------------------------------------------------------------*/
 842
 843 static int vivi_try_fmt(struct vivi_dev *dev, struct vivi_fh *fh,
 844                         struct v4l2_format *f)
 845 {
 846         struct vivi_fmt *fmt;
 847         enum v4l2_field field;
 848         unsigned int maxw, maxh;
 849
 850         if (format.fourcc != f->fmt.pix.pixelformat) {
 851                 dprintk(1,"Fourcc format invalid.\n");
 852                 return -EINVAL;
 853         }
 854         fmt=&format;
 855
 856         field = f->fmt.pix.field;
 857
 858         if (field == V4L2_FIELD_ANY) {
 859 //              field=V4L2_FIELD_INTERLACED;
 860                 field=V4L2_FIELD_SEQ_TB;
 861         } else if (V4L2_FIELD_INTERLACED != field) {
 862                 dprintk(1,"Field type invalid.\n");
 863                 return -EINVAL;
 864         }
 865
 866         maxw  = norm_maxw();
 867         maxh  = norm_maxh();
 868
 869         f->fmt.pix.field = field;
 870         if (f->fmt.pix.height < 32)
 871                 f->fmt.pix.height = 32;
 872         if (f->fmt.pix.height > maxh)
 873                 f->fmt.pix.height = maxh;
 874         if (f->fmt.pix.width < 48)
 875                 f->fmt.pix.width = 48;
 876         if (f->fmt.pix.width > maxw)
 877                 f->fmt.pix.width = maxw;
 878         f->fmt.pix.width &= ~0x03;
 879         f->fmt.pix.bytesperline =
 880                 (f->fmt.pix.width * fmt->depth) >> 3;
 881         f->fmt.pix.sizeimage =
 882                 f->fmt.pix.height * f->fmt.pix.bytesperline;
 883
 884         return 0;
 885 }
 886
 887 static int res_get(struct vivi_dev *dev, struct vivi_fh *fh)
 888 {
 889         /* is it free? */
 890         down(&dev->lock);
 891         if (dev->resources) {
 892                 /* no, someone else uses it */
 893                 up(&dev->lock);
 894                 return 0;
 895         }
 896         /* it's free, grab it */
 897         dev->resources =1;
 898         dprintk(1,"res: get\n");
 899         up(&dev->lock);
 900         return 1;
 901 }
 902
 903 static inline int res_locked(struct vivi_dev *dev)
 904 {
 905         return (dev->resources);
 906 }
 907
 908 static void res_free(struct vivi_dev *dev, struct vivi_fh *fh)
 909 {
 910         down(&dev->lock);
 911         dev->resources = 0;
 912         dprintk(1,"res: put\n");
 913         up(&dev->lock);
 914 }
 915
 916 static int vivi_do_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg)
 917 {
 918         struct vivi_fh  *fh     = file->private_data;
 919         struct vivi_dev *dev    = fh->dev;
 920         int ret=0;
 921
 922         if (debug) {
 923                 if (_IOC_DIR(cmd) & _IOC_WRITE)
 924                         v4l_printk_ioctl_arg("vivi(w)",cmd, arg);
 925                 else if (!_IOC_DIR(cmd) & _IOC_READ) {
 926                         v4l_print_ioctl("vivi", cmd);
 927                 }
 928         }
 929
 930         switch(cmd) {
 931         /* --- capabilities ------------------------------------------ */
 932         case VIDIOC_QUERYCAP:
 933         {
 934                 struct v4l2_capability *cap = (struct v4l2_capability*)arg;
 935
 936                 memset(cap, 0, sizeof(*cap));
 937
 938                 strcpy(cap->driver, "vivi");
 939                 strcpy(cap->card, "vivi");
 940                 cap->version = VIVI_VERSION;
 941                 cap->capabilities =
 942                                         V4L2_CAP_VIDEO_CAPTURE |
 943                                         V4L2_CAP_STREAMING     |
 944                                         V4L2_CAP_READWRITE;
 945                 break;
 946         }
 947         /* --- capture ioctls ---------------------------------------- */
 948         case VIDIOC_ENUM_FMT:
 949         {
 950                 struct v4l2_fmtdesc *f = arg;
 951                 enum v4l2_buf_type type;
 952                 unsigned int index;
 953
 954                 index = f->index;
 955                 type  = f->type;
 956
 957                 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 958                         ret=-EINVAL;
 959                         break;
 960                 }
 961
 962                 switch (type) {
 963                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 964                         if (index > 0){
 965                                 ret=-EINVAL;
 966                                 break;
 967                         }
 968                         memset(f,0,sizeof(*f));
 969
 970                         f->index = index;
 971                         f->type  = type;
 972                         strlcpy(f->description,format.name,sizeof(f->description));
 973                         f->pixelformat = format.fourcc;
 974                         break;
 975                 default:
 976                         ret=-EINVAL;
 977                 }
 978                 break;
 979         }
 980         case VIDIOC_G_FMT:
 981         {
 982                 struct v4l2_format *f = (struct v4l2_format *)arg;
 983
 984                 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 985                         ret=-EINVAL;
 986                         break;
 987                 }
 988
 989                 memset(&f->fmt.pix,0,sizeof(f->fmt.pix));
 990                 f->fmt.pix.width        = fh->width;
 991                 f->fmt.pix.height       = fh->height;
 992                 f->fmt.pix.field        = fh->vb_vidq.field;
 993                 f->fmt.pix.pixelformat  = fh->fmt->fourcc;
 994                 f->fmt.pix.bytesperline =
 995                         (f->fmt.pix.width * fh->fmt->depth) >> 3;
 996                 f->fmt.pix.sizeimage =
 997                         f->fmt.pix.height * f->fmt.pix.bytesperline;
 998                 break;
 999         }
1000         case VIDIOC_S_FMT:
1001         {
1002                 struct v4l2_format *f = arg;
1003
1004                 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1005                         dprintk(1,"Only capture supported.\n");
1006                         ret=-EINVAL;
1007                         break;
1008                 }
1009
1010                 ret = vivi_try_fmt(dev,fh,f);
1011                 if (ret < 0)
1012                         break;
1013
1014                 fh->fmt           = &format;
1015                 fh->width         = f->fmt.pix.width;
1016                 fh->height        = f->fmt.pix.height;
1017                 fh->vb_vidq.field = f->fmt.pix.field;
1018                 fh->type          = f->type;
1019
1020                 break;
1021         }
1022         case VIDIOC_TRY_FMT:
1023         {
1024                 struct v4l2_format *f = arg;
1025                 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1026                         ret=-EINVAL;
1027                         break;
1028                 }
1029
1030                 ret=vivi_try_fmt(dev,fh,f);
1031                 break;
1032         }
1033         case VIDIOC_REQBUFS:
1034                 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1035                         ret=-EINVAL;
1036                         break;
1037                 }
1038                 ret=videobuf_reqbufs(&fh->vb_vidq, arg);
1039                 break;
1040         case VIDIOC_QUERYBUF:
1041                 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1042                         ret=-EINVAL;
1043                         break;
1044                 }
1045                 ret=videobuf_querybuf(&fh->vb_vidq, arg);
1046                 break;
1047         case VIDIOC_QBUF:
1048                 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1049                         ret=-EINVAL;
1050                         break;
1051                 }
1052                 ret=videobuf_qbuf(&fh->vb_vidq, arg);
1053                 break;
1054         case VIDIOC_DQBUF:
1055                 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1056                         ret=-EINVAL;
1057                         break;
1058                 }
1059                 ret=videobuf_dqbuf(&fh->vb_vidq, arg,
1060                                         file->f_flags & O_NONBLOCK);
1061                 break;
1062 #ifdef HAVE_V4L1
1063         /* --- streaming capture ------------------------------------- */
1064         case VIDIOCGMBUF:
1065         {
1066                 struct video_mbuf *mbuf = arg;
1067                 struct videobuf_queue *q=&fh->vb_vidq;
1068                 struct v4l2_requestbuffers req;
1069                 unsigned int i;
1070
1071                 memset(&req,0,sizeof(req));
1072                 req.type   = q->type;
1073                 req.count  = 8;
1074                 req.memory = V4L2_MEMORY_MMAP;
1075                 ret = videobuf_reqbufs(q,&req);
1076                 if (ret < 0)
1077                         break;
1078                 memset(mbuf,0,sizeof(*mbuf));
1079                 mbuf->frames = req.count;
1080                 mbuf->size   = 0;
1081                 for (i = 0; i < mbuf->frames; i++) {
1082                         mbuf->offsets[i]  = q->bufs[i]->boff;
1083                         mbuf->size       += q->bufs[i]->bsize;
1084                 }
1085                 break;
1086         }
1087 #endif
1088         case VIDIOC_STREAMON:
1089         {
1090                 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1091                         return -EINVAL;
1092                 if (!res_get(dev,fh))
1093                         return -EBUSY;
1094                 ret=videobuf_streamon(&fh->vb_vidq);
1095                 break;
1096         }
1097         case VIDIOC_STREAMOFF:
1098         {
1099                 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1100                         ret=-EINVAL;
1101                         break;
1102                 }
1103                 ret = videobuf_streamoff(&fh->vb_vidq);
1104                 if (ret < 0)
1105                         break;
1106                 res_free(dev,fh);
1107                 break;
1108         }
1109         /* ---------- tv norms ---------- */
1110         case VIDIOC_ENUMSTD:
1111         {
1112                 struct v4l2_standard *e = arg;
1113
1114                 if (e->index>0) {
1115                         ret=-EINVAL;
1116                         break;
1117                 }
1118                 ret = v4l2_video_std_construct(e, V4L2_STD_NTSC_M, "NTSC-M");
1119
1120                 /* Allows vivi to use different fps from video std */
1121                 e->frameperiod.numerator = WAKE_NUMERATOR;
1122                 e->frameperiod.denominator = WAKE_DENOMINATOR;
1123
1124                 break;
1125         }
1126         case VIDIOC_G_STD:
1127         {
1128                 v4l2_std_id *id = arg;
1129
1130                 *id = V4L2_STD_NTSC_M;
1131                 break;
1132         }
1133         case VIDIOC_S_STD:
1134         {
1135                 break;
1136         }
1137         /* ------ input switching ---------- */
1138         case VIDIOC_ENUMINPUT:
1139         { /* only one input in this sample driver */
1140                 struct v4l2_input *inp = arg;
1141
1142                 if (inp->index != 0) {
1143                         ret=-EINVAL;
1144                         break;
1145                 }
1146                 memset(inp, 0, sizeof(*inp));
1147
1148                 inp->index = 0;
1149                 inp->type = V4L2_INPUT_TYPE_CAMERA;
1150                 inp->std = V4L2_STD_NTSC_M;
1151                 strcpy(inp->name,"Camera");
1152                 break;
1153         }
1154         case VIDIOC_G_INPUT:
1155         {
1156                 unsigned int *i = arg;
1157
1158                 *i = 0;
1159                 break;
1160         }
1161         case VIDIOC_S_INPUT:
1162         {
1163                 unsigned int *i = arg;
1164
1165                 if (*i > 0)
1166                         ret=-EINVAL;
1167                 break;
1168         }
1169
1170         /* --- controls ---------------------------------------------- */
1171         case VIDIOC_QUERYCTRL:
1172         {
1173                 struct v4l2_queryctrl *qc = arg;
1174                 int i;
1175
1176                 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1177                         if (qc->id && qc->id == vivi_qctrl[i].id) {
1178                                 memcpy(qc, &(vivi_qctrl[i]),
1179                                         sizeof(*qc));
1180                                 break;
1181                         }
1182
1183                 ret=-EINVAL;
1184                 break;
1185         }
1186         case VIDIOC_G_CTRL:
1187         {
1188                 struct v4l2_control *ctrl = arg;
1189                 int i;
1190
1191                 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1192                         if (ctrl->id == vivi_qctrl[i].id) {
1193                                 ctrl->value=qctl_regs[i];
1194                                 break;
1195                         }
1196
1197                 ret=-EINVAL;
1198                 break;
1199         }
1200         case VIDIOC_S_CTRL:
1201         {
1202                 struct v4l2_control *ctrl = arg;
1203                 int i;
1204                 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1205                         if (ctrl->id == vivi_qctrl[i].id) {
1206                                 if (ctrl->value <
1207                                         vivi_qctrl[i].minimum
1208                                         || ctrl->value >
1209                                         vivi_qctrl[i].maximum) {
1210                                                 ret=-ERANGE;
1211                                                 break;
1212                                         }
1213                                 qctl_regs[i]=ctrl->value;
1214                                 break;
1215                         }
1216                 ret=-EINVAL;
1217                 break;
1218         }
1219         default:
1220                 ret=v4l_compat_translate_ioctl(inode,file,cmd,arg,vivi_do_ioctl);
1221         }
1222
1223         if (debug) {
1224                 if (ret<0) {
1225                         v4l_print_ioctl("vivi(err)", cmd);
1226                         dprintk(1,"errcode=%d\n",ret);
1227                 } else if (_IOC_DIR(cmd) & _IOC_READ)
1228                         v4l_printk_ioctl_arg("vivi(r)",cmd, arg);
1229         }
1230
1231         return ret;
1232 }
1233
1234 static int vivi_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1235 {
1236         return video_usercopy(inode, file, cmd, arg, vivi_do_ioctl);
1237 }
1238
1239 /* ------------------------------------------------------------------
1240         File operations for the device
1241    ------------------------------------------------------------------*/
1242
1243 #define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
1244
1245 static int vivi_open(struct inode *inode, struct file *file)
1246 {
1247         int minor = iminor(inode);
1248         struct vivi_dev *h,*dev = NULL;
1249         struct vivi_fh *fh;
1250         struct list_head *list;
1251         enum v4l2_buf_type type = 0;
1252         int i;
1253
1254         printk(KERN_DEBUG "vivi: open called (minor=%d)\n",minor);
1255
1256         list_for_each(list,&vivi_devlist) {
1257                 h = list_entry(list, struct vivi_dev, vivi_devlist);
1258                 if (h->video_dev.minor == minor) {
1259                         dev  = h;
1260                         type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1261                 }
1262         }
1263         if (NULL == dev)
1264                 return -ENODEV;
1265
1266
1267         /* If more than one user, mutex should be added */
1268         dev->users++;
1269
1270         dprintk(1,"open minor=%d type=%s users=%d\n",
1271                                 minor,v4l2_type_names[type],dev->users);
1272
1273         /* allocate + initialize per filehandle data */
1274         fh = kzalloc(sizeof(*fh),GFP_KERNEL);
1275         if (NULL == fh) {
1276                 dev->users--;
1277                 return -ENOMEM;
1278         }
1279
1280         file->private_data = fh;
1281         fh->dev      = dev;
1282         fh->type     = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1283         fh->fmt      = &format;
1284         fh->width    = 640;
1285         fh->height   = 480;
1286
1287         /* Put all controls at a sane state */
1288         for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1289                 qctl_regs[i] =vivi_qctrl[i].default_value;
1290
1291         dprintk(1,"Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1292                 (unsigned long)fh,(unsigned long)dev,(unsigned long)&dev->vidq);
1293         dprintk(1,"Open: list_empty queued=%d\n",list_empty(&dev->vidq.queued));
1294         dprintk(1,"Open: list_empty active=%d\n",list_empty(&dev->vidq.active));
1295
1296         /* Resets frame counters */
1297         dev->h=0;
1298         dev->m=0;
1299         dev->s=0;
1300         dev->us=0;
1301         dev->jiffies=jiffies;
1302         sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
1303                         dev->h,dev->m,dev->s,(dev->us+500)/1000);
1304
1305         videobuf_queue_init(&fh->vb_vidq, &vivi_video_qops,
1306                         NULL, NULL,
1307                         fh->type,
1308                         V4L2_FIELD_INTERLACED,
1309                         sizeof(struct vivi_buffer),fh);
1310
1311         return 0;
1312 }
1313
1314 static ssize_t
1315 vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1316 {
1317         struct vivi_fh *fh = file->private_data;
1318
1319         if (fh->type==V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1320                 if (res_locked(fh->dev))
1321                         return -EBUSY;
1322                 return videobuf_read_one(&fh->vb_vidq, data, count, ppos,
1323                                         file->f_flags & O_NONBLOCK);
1324         }
1325         return 0;
1326 }
1327
1328 static unsigned int
1329 vivi_poll(struct file *file, struct poll_table_struct *wait)
1330 {
1331         struct vivi_fh *fh = file->private_data;
1332         struct vivi_buffer *buf;
1333
1334         dprintk(1,"%s\n",__FUNCTION__);
1335
1336         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1337                 return POLLERR;
1338
1339         if (res_get(fh->dev,fh)) {
1340                 dprintk(1,"poll: mmap interface\n");
1341                 /* streaming capture */
1342                 if (list_empty(&fh->vb_vidq.stream))
1343                         return POLLERR;
1344                 buf = list_entry(fh->vb_vidq.stream.next,struct vivi_buffer,vb.stream);
1345         } else {
1346                 dprintk(1,"poll: read() interface\n");
1347                 /* read() capture */
1348                 buf = (struct vivi_buffer*)fh->vb_vidq.read_buf;
1349                 if (NULL == buf)
1350                         return POLLERR;
1351         }
1352         poll_wait(file, &buf->vb.done, wait);
1353         if (buf->vb.state == STATE_DONE ||
1354             buf->vb.state == STATE_ERROR)
1355                 return POLLIN|POLLRDNORM;
1356         return 0;
1357 }
1358
1359 static int vivi_release(struct inode *inode, struct file *file)
1360 {
1361         struct vivi_fh  *fh     = file->private_data;
1362         struct vivi_dev *dev    = fh->dev;
1363         struct vivi_dmaqueue *vidq = &dev->vidq;
1364
1365         int minor = iminor(inode);
1366
1367         vivi_stop_thread(vidq);
1368         videobuf_mmap_free(&fh->vb_vidq);
1369
1370         kfree (fh);
1371
1372         dev->users--;
1373
1374         printk(KERN_DEBUG "vivi: close called (minor=%d, users=%d)\n",minor,dev->users);
1375
1376         return 0;
1377 }
1378
1379 static int
1380 vivi_mmap(struct file *file, struct vm_area_struct * vma)
1381 {
1382         struct vivi_fh *fh = file->private_data;
1383         int ret;
1384
1385         dprintk (1,"mmap called, vma=0x%08lx\n",(unsigned long)vma);
1386
1387         ret=videobuf_mmap_mapper(&fh->vb_vidq, vma);
1388
1389         dprintk (1,"vma start=0x%08lx, size=%ld, ret=%d\n",
1390                 (unsigned long)vma->vm_start,
1391                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1392                 ret);
1393
1394         return ret;
1395 }
1396
1397 static struct file_operations vivi_fops = {
1398         .owner          = THIS_MODULE,
1399         .open           = vivi_open,
1400         .release        = vivi_release,
1401         .read           = vivi_read,
1402         .poll           = vivi_poll,
1403         .ioctl          = vivi_ioctl,
1404         .mmap           = vivi_mmap,
1405         .llseek         = no_llseek,
1406 };
1407
1408 static struct video_device vivi = {
1409         .name           = "VTM Virtual Video Capture Board",
1410         .type           = VID_TYPE_CAPTURE,
1411         .hardware       = 0,
1412         .fops           = &vivi_fops,
1413         .minor          = -1,
1414 //      .release        = video_device_release,
1415 };
1416 /* ------------------------------------------------------------------
1417         Initialization and module stuff
1418    ------------------------------------------------------------------*/
1419
1420 static int __init vivi_init(void)
1421 {
1422         int ret;
1423         struct vivi_dev *dev;
1424
1425         dev = kzalloc(sizeof(*dev),GFP_KERNEL);
1426         if (NULL == dev)
1427                 return -ENOMEM;
1428         list_add_tail(&dev->vivi_devlist,&vivi_devlist);
1429
1430         /* init video dma queues */
1431         INIT_LIST_HEAD(&dev->vidq.active);
1432         INIT_LIST_HEAD(&dev->vidq.queued);
1433
1434         /* initialize locks */
1435         init_MUTEX(&dev->lock);
1436
1437         dev->vidq.timeout.function = vivi_vid_timeout;
1438         dev->vidq.timeout.data     = (unsigned long)dev;
1439         init_timer(&dev->vidq.timeout);
1440
1441         ret = video_register_device(&vivi, VFL_TYPE_GRABBER, video_nr);
1442         printk(KERN_INFO "Video Technology Magazine Virtual Video Capture Board (Load status: %d)\n", ret);
1443         return ret;
1444 }
1445
1446 static void __exit vivi_exit(void)
1447 {
1448         struct vivi_dev *h;
1449         struct list_head *list;
1450
1451         list_for_each(list,&vivi_devlist) {
1452                 h = list_entry(list, struct vivi_dev, vivi_devlist);
1453                 kfree (h);
1454         }
1455         video_unregister_device(&vivi);
1456 }
1457
1458 module_init(vivi_init);
1459 module_exit(vivi_exit);