drivers/media/platform/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  *      Conversion to videobuf2 by Pawel Osciak & Marek Szyprowski
  11  *      Copyright (c) 2010 Samsung Electronics
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the BSD Licence, GNU General Public License
  15  * as published by the Free Software Foundation; either version 2 of the
  16  * License, or (at your option) any later version
  17  */
  18 #include <linux/module.h>
  19 #include <linux/errno.h>
  20 #include <linux/kernel.h>
  21 #include <linux/init.h>
  22 #include <linux/sched.h>
  23 #include <linux/slab.h>
  24 #include <linux/font.h>
  25 #include <linux/mutex.h>
  26 #include <linux/videodev2.h>
  27 #include <linux/kthread.h>
  28 #include <linux/freezer.h>
  29 #include <media/videobuf2-vmalloc.h>
  30 #include <media/v4l2-device.h>
  31 #include <media/v4l2-ioctl.h>
  32 #include <media/v4l2-ctrls.h>
  33 #include <media/v4l2-fh.h>
  34 #include <media/v4l2-event.h>
  35 #include <media/v4l2-common.h>
  36
  37 #define VIVI_MODULE_NAME "vivi"
  38
  39 /* Wake up at about 30 fps */
  40 #define WAKE_NUMERATOR 30
  41 #define WAKE_DENOMINATOR 1001
  42 #define BUFFER_TIMEOUT     msecs_to_jiffies(500)  /* 0.5 seconds */
  43
  44 #define MAX_WIDTH 1920
  45 #define MAX_HEIGHT 1200
  46
  47 #define VIVI_VERSION "0.8.1"
  48
  49 MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
  50 MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
  51 MODULE_LICENSE("Dual BSD/GPL");
  52 MODULE_VERSION(VIVI_VERSION);
  53
  54 static unsigned video_nr = -1;
  55 module_param(video_nr, uint, 0644);
  56 MODULE_PARM_DESC(video_nr, "videoX start number, -1 is autodetect");
  57
  58 static unsigned n_devs = 1;
  59 module_param(n_devs, uint, 0644);
  60 MODULE_PARM_DESC(n_devs, "number of video devices to create");
  61
  62 static unsigned debug;
  63 module_param(debug, uint, 0644);
  64 MODULE_PARM_DESC(debug, "activates debug info");
  65
  66 static unsigned int vid_limit = 16;
  67 module_param(vid_limit, uint, 0644);
  68 MODULE_PARM_DESC(vid_limit, "capture memory limit in megabytes");
  69
  70 /* Global font descriptor */
  71 static const u8 *font8x16;
  72
  73 #define dprintk(dev, level, fmt, arg...) \
  74         v4l2_dbg(level, debug, &dev->v4l2_dev, fmt, ## arg)
  75
  76 /* ------------------------------------------------------------------
  77         Basic structures
  78    ------------------------------------------------------------------*/
  79
  80 struct vivi_fmt {
  81         char  *name;
  82         u32   fourcc;          /* v4l2 format id */
  83         u8    depth;
  84         bool  is_yuv;
  85 };
  86
  87 static struct vivi_fmt formats[] = {
  88         {
  89                 .name     = "4:2:2, packed, YUYV",
  90                 .fourcc   = V4L2_PIX_FMT_YUYV,
  91                 .depth    = 16,
  92                 .is_yuv   = true,
  93         },
  94         {
  95                 .name     = "4:2:2, packed, UYVY",
  96                 .fourcc   = V4L2_PIX_FMT_UYVY,
  97                 .depth    = 16,
  98                 .is_yuv   = true,
  99         },
 100         {
 101                 .name     = "4:2:2, packed, YVYU",
 102                 .fourcc   = V4L2_PIX_FMT_YVYU,
 103                 .depth    = 16,
 104                 .is_yuv   = true,
 105         },
 106         {
 107                 .name     = "4:2:2, packed, VYUY",
 108                 .fourcc   = V4L2_PIX_FMT_VYUY,
 109                 .depth    = 16,
 110                 .is_yuv   = true,
 111         },
 112         {
 113                 .name     = "RGB565 (LE)",
 114                 .fourcc   = V4L2_PIX_FMT_RGB565, /* gggbbbbb rrrrrggg */
 115                 .depth    = 16,
 116         },
 117         {
 118                 .name     = "RGB565 (BE)",
 119                 .fourcc   = V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */
 120                 .depth    = 16,
 121         },
 122         {
 123                 .name     = "RGB555 (LE)",
 124                 .fourcc   = V4L2_PIX_FMT_RGB555, /* gggbbbbb arrrrrgg */
 125                 .depth    = 16,
 126         },
 127         {
 128                 .name     = "RGB555 (BE)",
 129                 .fourcc   = V4L2_PIX_FMT_RGB555X, /* arrrrrgg gggbbbbb */
 130                 .depth    = 16,
 131         },
 132         {
 133                 .name     = "RGB24 (LE)",
 134                 .fourcc   = V4L2_PIX_FMT_RGB24, /* rgb */
 135                 .depth    = 24,
 136         },
 137         {
 138                 .name     = "RGB24 (BE)",
 139                 .fourcc   = V4L2_PIX_FMT_BGR24, /* bgr */
 140                 .depth    = 24,
 141         },
 142         {
 143                 .name     = "RGB32 (LE)",
 144                 .fourcc   = V4L2_PIX_FMT_RGB32, /* argb */
 145                 .depth    = 32,
 146         },
 147         {
 148                 .name     = "RGB32 (BE)",
 149                 .fourcc   = V4L2_PIX_FMT_BGR32, /* bgra */
 150                 .depth    = 32,
 151         },
 152 };
 153
 154 static struct vivi_fmt *get_format(struct v4l2_format *f)
 155 {
 156         struct vivi_fmt *fmt;
 157         unsigned int k;
 158
 159         for (k = 0; k < ARRAY_SIZE(formats); k++) {
 160                 fmt = &formats[k];
 161                 if (fmt->fourcc == f->fmt.pix.pixelformat)
 162                         break;
 163         }
 164
 165         if (k == ARRAY_SIZE(formats))
 166                 return NULL;
 167
 168         return &formats[k];
 169 }
 170
 171 /* buffer for one video frame */
 172 struct vivi_buffer {
 173         /* common v4l buffer stuff -- must be first */
 174         struct vb2_buffer       vb;
 175         struct list_head        list;
 176         struct vivi_fmt        *fmt;
 177 };
 178
 179 struct vivi_dmaqueue {
 180         struct list_head       active;
 181
 182         /* thread for generating video stream*/
 183         struct task_struct         *kthread;
 184         wait_queue_head_t          wq;
 185         /* Counters to control fps rate */
 186         int                        frame;
 187         int                        ini_jiffies;
 188 };
 189
 190 static LIST_HEAD(vivi_devlist);
 191
 192 struct vivi_dev {
 193         struct list_head           vivi_devlist;
 194         struct v4l2_device         v4l2_dev;
 195         struct v4l2_ctrl_handler   ctrl_handler;
 196         struct video_device        vdev;
 197
 198         /* controls */
 199         struct v4l2_ctrl           *brightness;
 200         struct v4l2_ctrl           *contrast;
 201         struct v4l2_ctrl           *saturation;
 202         struct v4l2_ctrl           *hue;
 203         struct {
 204                 /* autogain/gain cluster */
 205                 struct v4l2_ctrl           *autogain;
 206                 struct v4l2_ctrl           *gain;
 207         };
 208         struct v4l2_ctrl           *volume;
 209         struct v4l2_ctrl           *alpha;
 210         struct v4l2_ctrl           *button;
 211         struct v4l2_ctrl           *boolean;
 212         struct v4l2_ctrl           *int32;
 213         struct v4l2_ctrl           *int64;
 214         struct v4l2_ctrl           *menu;
 215         struct v4l2_ctrl           *string;
 216         struct v4l2_ctrl           *bitmask;
 217         struct v4l2_ctrl           *int_menu;
 218
 219         spinlock_t                 slock;
 220         struct mutex               mutex;
 221
 222         struct vivi_dmaqueue       vidq;
 223
 224         /* Several counters */
 225         unsigned                   ms;
 226         unsigned long              jiffies;
 227         unsigned                   button_pressed;
 228
 229         int                        mv_count;    /* Controls bars movement */
 230
 231         /* Input Number */
 232         int                        input;
 233
 234         /* video capture */
 235         struct vivi_fmt            *fmt;
 236         unsigned int               width, height;
 237         struct vb2_queue           vb_vidq;
 238         unsigned int               field_count;
 239
 240         u8                         bars[9][3];
 241         u8                         line[MAX_WIDTH * 8];
 242         unsigned int               pixelsize;
 243         u8                         alpha_component;
 244 };
 245
 246 /* ------------------------------------------------------------------
 247         DMA and thread functions
 248    ------------------------------------------------------------------*/
 249
 250 /* Bars and Colors should match positions */
 251
 252 enum colors {
 253         WHITE,
 254         AMBER,
 255         CYAN,
 256         GREEN,
 257         MAGENTA,
 258         RED,
 259         BLUE,
 260         BLACK,
 261         TEXT_BLACK,
 262 };
 263
 264 /* R   G   B */
 265 #define COLOR_WHITE     {204, 204, 204}
 266 #define COLOR_AMBER     {208, 208,   0}
 267 #define COLOR_CYAN      {  0, 206, 206}
 268 #define COLOR_GREEN     {  0, 239,   0}
 269 #define COLOR_MAGENTA   {239,   0, 239}
 270 #define COLOR_RED       {205,   0,   0}
 271 #define COLOR_BLUE      {  0,   0, 255}
 272 #define COLOR_BLACK     {  0,   0,   0}
 273
 274 struct bar_std {
 275         u8 bar[9][3];
 276 };
 277
 278 /* Maximum number of bars are 10 - otherwise, the input print code
 279    should be modified */
 280 static struct bar_std bars[] = {
 281         {       /* Standard ITU-R color bar sequence */
 282                 { COLOR_WHITE, COLOR_AMBER, COLOR_CYAN, COLOR_GREEN,
 283                   COLOR_MAGENTA, COLOR_RED, COLOR_BLUE, COLOR_BLACK, COLOR_BLACK }
 284         }, {
 285                 { COLOR_WHITE, COLOR_AMBER, COLOR_BLACK, COLOR_WHITE,
 286                   COLOR_AMBER, COLOR_BLACK, COLOR_WHITE, COLOR_AMBER, COLOR_BLACK }
 287         }, {
 288                 { COLOR_WHITE, COLOR_CYAN, COLOR_BLACK, COLOR_WHITE,
 289                   COLOR_CYAN, COLOR_BLACK, COLOR_WHITE, COLOR_CYAN, COLOR_BLACK }
 290         }, {
 291                 { COLOR_WHITE, COLOR_GREEN, COLOR_BLACK, COLOR_WHITE,
 292                   COLOR_GREEN, COLOR_BLACK, COLOR_WHITE, COLOR_GREEN, COLOR_BLACK }
 293         },
 294 };
 295
 296 #define NUM_INPUTS ARRAY_SIZE(bars)
 297
 298 #define TO_Y(r, g, b) \
 299         (((16829 * r + 33039 * g + 6416 * b  + 32768) >> 16) + 16)
 300 /* RGB to  V(Cr) Color transform */
 301 #define TO_V(r, g, b) \
 302         (((28784 * r - 24103 * g - 4681 * b  + 32768) >> 16) + 128)
 303 /* RGB to  U(Cb) Color transform */
 304 #define TO_U(r, g, b) \
 305         (((-9714 * r - 19070 * g + 28784 * b + 32768) >> 16) + 128)
 306
 307 /* precalculate color bar values to speed up rendering */
 308 static void precalculate_bars(struct vivi_dev *dev)
 309 {
 310         u8 r, g, b;
 311         int k, is_yuv;
 312
 313         for (k = 0; k < 9; k++) {
 314                 r = bars[dev->input].bar[k][0];
 315                 g = bars[dev->input].bar[k][1];
 316                 b = bars[dev->input].bar[k][2];
 317                 is_yuv = dev->fmt->is_yuv;
 318
 319                 switch (dev->fmt->fourcc) {
 320                 case V4L2_PIX_FMT_RGB565:
 321                 case V4L2_PIX_FMT_RGB565X:
 322                         r >>= 3;
 323                         g >>= 2;
 324                         b >>= 3;
 325                         break;
 326                 case V4L2_PIX_FMT_RGB555:
 327                 case V4L2_PIX_FMT_RGB555X:
 328                         r >>= 3;
 329                         g >>= 3;
 330                         b >>= 3;
 331                         break;
 332                 case V4L2_PIX_FMT_YUYV:
 333                 case V4L2_PIX_FMT_UYVY:
 334                 case V4L2_PIX_FMT_YVYU:
 335                 case V4L2_PIX_FMT_VYUY:
 336                 case V4L2_PIX_FMT_RGB24:
 337                 case V4L2_PIX_FMT_BGR24:
 338                 case V4L2_PIX_FMT_RGB32:
 339                 case V4L2_PIX_FMT_BGR32:
 340                         break;
 341                 }
 342
 343                 if (is_yuv) {
 344                         dev->bars[k][0] = TO_Y(r, g, b);        /* Luma */
 345                         dev->bars[k][1] = TO_U(r, g, b);        /* Cb */
 346                         dev->bars[k][2] = TO_V(r, g, b);        /* Cr */
 347                 } else {
 348                         dev->bars[k][0] = r;
 349                         dev->bars[k][1] = g;
 350                         dev->bars[k][2] = b;
 351                 }
 352         }
 353 }
 354
 355 #define TSTAMP_MIN_Y    24
 356 #define TSTAMP_MAX_Y    (TSTAMP_MIN_Y + 15)
 357 #define TSTAMP_INPUT_X  10
 358 #define TSTAMP_MIN_X    (54 + TSTAMP_INPUT_X)
 359
 360 /* 'odd' is true for pixels 1, 3, 5, etc. and false for pixels 0, 2, 4, etc. */
 361 static void gen_twopix(struct vivi_dev *dev, u8 *buf, int colorpos, bool odd)
 362 {
 363         u8 r_y, g_u, b_v;
 364         u8 alpha = dev->alpha_component;
 365         int color;
 366         u8 *p;
 367
 368         r_y = dev->bars[colorpos][0]; /* R or precalculated Y */
 369         g_u = dev->bars[colorpos][1]; /* G or precalculated U */
 370         b_v = dev->bars[colorpos][2]; /* B or precalculated V */
 371
 372         for (color = 0; color < dev->pixelsize; color++) {
 373                 p = buf + color;
 374
 375                 switch (dev->fmt->fourcc) {
 376                 case V4L2_PIX_FMT_YUYV:
 377                         switch (color) {
 378                         case 0:
 379                                 *p = r_y;
 380                                 break;
 381                         case 1:
 382                                 *p = odd ? b_v : g_u;
 383                                 break;
 384                         }
 385                         break;
 386                 case V4L2_PIX_FMT_UYVY:
 387                         switch (color) {
 388                         case 0:
 389                                 *p = odd ? b_v : g_u;
 390                                 break;
 391                         case 1:
 392                                 *p = r_y;
 393                                 break;
 394                         }
 395                         break;
 396                 case V4L2_PIX_FMT_YVYU:
 397                         switch (color) {
 398                         case 0:
 399                                 *p = r_y;
 400                                 break;
 401                         case 1:
 402                                 *p = odd ? g_u : b_v;
 403                                 break;
 404                         }
 405                         break;
 406                 case V4L2_PIX_FMT_VYUY:
 407                         switch (color) {
 408                         case 0:
 409                                 *p = odd ? g_u : b_v;
 410                                 break;
 411                         case 1:
 412                                 *p = r_y;
 413                                 break;
 414                         }
 415                         break;
 416                 case V4L2_PIX_FMT_RGB565:
 417                         switch (color) {
 418                         case 0:
 419                                 *p = (g_u << 5) | b_v;
 420                                 break;
 421                         case 1:
 422                                 *p = (r_y << 3) | (g_u >> 3);
 423                                 break;
 424                         }
 425                         break;
 426                 case V4L2_PIX_FMT_RGB565X:
 427                         switch (color) {
 428                         case 0:
 429                                 *p = (r_y << 3) | (g_u >> 3);
 430                                 break;
 431                         case 1:
 432                                 *p = (g_u << 5) | b_v;
 433                                 break;
 434                         }
 435                         break;
 436                 case V4L2_PIX_FMT_RGB555:
 437                         switch (color) {
 438                         case 0:
 439                                 *p = (g_u << 5) | b_v;
 440                                 break;
 441                         case 1:
 442                                 *p = (alpha & 0x80) | (r_y << 2) | (g_u >> 3);
 443                                 break;
 444                         }
 445                         break;
 446                 case V4L2_PIX_FMT_RGB555X:
 447                         switch (color) {
 448                         case 0:
 449                                 *p = (alpha & 0x80) | (r_y << 2) | (g_u >> 3);
 450                                 break;
 451                         case 1:
 452                                 *p = (g_u << 5) | b_v;
 453                                 break;
 454                         }
 455                         break;
 456                 case V4L2_PIX_FMT_RGB24:
 457                         switch (color) {
 458                         case 0:
 459                                 *p = r_y;
 460                                 break;
 461                         case 1:
 462                                 *p = g_u;
 463                                 break;
 464                         case 2:
 465                                 *p = b_v;
 466                                 break;
 467                         }
 468                         break;
 469                 case V4L2_PIX_FMT_BGR24:
 470                         switch (color) {
 471                         case 0:
 472                                 *p = b_v;
 473                                 break;
 474                         case 1:
 475                                 *p = g_u;
 476                                 break;
 477                         case 2:
 478                                 *p = r_y;
 479                                 break;
 480                         }
 481                         break;
 482                 case V4L2_PIX_FMT_RGB32:
 483                         switch (color) {
 484                         case 0:
 485                                 *p = alpha;
 486                                 break;
 487                         case 1:
 488                                 *p = r_y;
 489                                 break;
 490                         case 2:
 491                                 *p = g_u;
 492                                 break;
 493                         case 3:
 494                                 *p = b_v;
 495                                 break;
 496                         }
 497                         break;
 498                 case V4L2_PIX_FMT_BGR32:
 499                         switch (color) {
 500                         case 0:
 501                                 *p = b_v;
 502                                 break;
 503                         case 1:
 504                                 *p = g_u;
 505                                 break;
 506                         case 2:
 507                                 *p = r_y;
 508                                 break;
 509                         case 3:
 510                                 *p = alpha;
 511                                 break;
 512                         }
 513                         break;
 514                 }
 515         }
 516 }
 517
 518 static void precalculate_line(struct vivi_dev *dev)
 519 {
 520         int w;
 521
 522         for (w = 0; w < dev->width * 2; w++) {
 523                 int colorpos = w / (dev->width / 8) % 8;
 524
 525                 gen_twopix(dev, dev->line + w * dev->pixelsize, colorpos, w & 1);
 526         }
 527 }
 528
 529 static void gen_text(struct vivi_dev *dev, char *basep,
 530                                         int y, int x, char *text)
 531 {
 532         int line;
 533
 534         /* Checks if it is possible to show string */
 535         if (y + 16 >= dev->height || x + strlen(text) * 8 >= dev->width)
 536                 return;
 537
 538         /* Print stream time */
 539         for (line = y; line < y + 16; line++) {
 540                 int j = 0;
 541                 char *pos = basep + line * dev->width * dev->pixelsize + x * dev->pixelsize;
 542                 char *s;
 543
 544                 for (s = text; *s; s++) {
 545                         u8 chr = font8x16[*s * 16 + line - y];
 546                         int i;
 547
 548                         for (i = 0; i < 7; i++, j++) {
 549                                 /* Draw white font on black background */
 550                                 if (chr & (1 << (7 - i)))
 551                                         gen_twopix(dev, pos + j * dev->pixelsize, WHITE, (x+y) & 1);
 552                                 else
 553                                         gen_twopix(dev, pos + j * dev->pixelsize, TEXT_BLACK, (x+y) & 1);
 554                         }
 555                 }
 556         }
 557 }
 558
 559 static void vivi_fillbuff(struct vivi_dev *dev, struct vivi_buffer *buf)
 560 {
 561         int wmax = dev->width;
 562         int hmax = dev->height;
 563         struct timeval ts;
 564         void *vbuf = vb2_plane_vaddr(&buf->vb, 0);
 565         unsigned ms;
 566         char str[100];
 567         int h, line = 1;
 568         s32 gain;
 569
 570         if (!vbuf)
 571                 return;
 572
 573         for (h = 0; h < hmax; h++)
 574                 memcpy(vbuf + h * wmax * dev->pixelsize,
 575                        dev->line + (dev->mv_count % wmax) * dev->pixelsize,
 576                        wmax * dev->pixelsize);
 577
 578         /* Updates stream time */
 579
 580         dev->ms += jiffies_to_msecs(jiffies - dev->jiffies);
 581         dev->jiffies = jiffies;
 582         ms = dev->ms;
 583         snprintf(str, sizeof(str), " %02d:%02d:%02d:%03d ",
 584                         (ms / (60 * 60 * 1000)) % 24,
 585                         (ms / (60 * 1000)) % 60,
 586                         (ms / 1000) % 60,
 587                         ms % 1000);
 588         gen_text(dev, vbuf, line++ * 16, 16, str);
 589         snprintf(str, sizeof(str), " %dx%d, input %d ",
 590                         dev->width, dev->height, dev->input);
 591         gen_text(dev, vbuf, line++ * 16, 16, str);
 592
 593         gain = v4l2_ctrl_g_ctrl(dev->gain);
 594         mutex_lock(dev->ctrl_handler.lock);
 595         snprintf(str, sizeof(str), " brightness %3d, contrast %3d, saturation %3d, hue %d ",
 596                         dev->brightness->cur.val,
 597                         dev->contrast->cur.val,
 598                         dev->saturation->cur.val,
 599                         dev->hue->cur.val);
 600         gen_text(dev, vbuf, line++ * 16, 16, str);
 601         snprintf(str, sizeof(str), " autogain %d, gain %3d, volume %3d, alpha 0x%02x ",
 602                         dev->autogain->cur.val, gain, dev->volume->cur.val,
 603                         dev->alpha->cur.val);
 604         gen_text(dev, vbuf, line++ * 16, 16, str);
 605         snprintf(str, sizeof(str), " int32 %d, int64 %lld, bitmask %08x ",
 606                         dev->int32->cur.val,
 607                         dev->int64->cur.val64,
 608                         dev->bitmask->cur.val);
 609         gen_text(dev, vbuf, line++ * 16, 16, str);
 610         snprintf(str, sizeof(str), " boolean %d, menu %s, string \"%s\" ",
 611                         dev->boolean->cur.val,
 612                         dev->menu->qmenu[dev->menu->cur.val],
 613                         dev->string->cur.string);
 614         gen_text(dev, vbuf, line++ * 16, 16, str);
 615         snprintf(str, sizeof(str), " integer_menu %lld, value %d ",
 616                         dev->int_menu->qmenu_int[dev->int_menu->cur.val],
 617                         dev->int_menu->cur.val);
 618         gen_text(dev, vbuf, line++ * 16, 16, str);
 619         mutex_unlock(dev->ctrl_handler.lock);
 620         if (dev->button_pressed) {
 621                 dev->button_pressed--;
 622                 snprintf(str, sizeof(str), " button pressed!");
 623                 gen_text(dev, vbuf, line++ * 16, 16, str);
 624         }
 625
 626         dev->mv_count += 2;
 627
 628         buf->vb.v4l2_buf.field = V4L2_FIELD_INTERLACED;
 629         dev->field_count++;
 630         buf->vb.v4l2_buf.sequence = dev->field_count >> 1;
 631         do_gettimeofday(&ts);
 632         buf->vb.v4l2_buf.timestamp = ts;
 633 }
 634
 635 static void vivi_thread_tick(struct vivi_dev *dev)
 636 {
 637         struct vivi_dmaqueue *dma_q = &dev->vidq;
 638         struct vivi_buffer *buf;
 639         unsigned long flags = 0;
 640
 641         dprintk(dev, 1, "Thread tick\n");
 642
 643         spin_lock_irqsave(&dev->slock, flags);
 644         if (list_empty(&dma_q->active)) {
 645                 dprintk(dev, 1, "No active queue to serve\n");
 646                 spin_unlock_irqrestore(&dev->slock, flags);
 647                 return;
 648         }
 649
 650         buf = list_entry(dma_q->active.next, struct vivi_buffer, list);
 651         list_del(&buf->list);
 652         spin_unlock_irqrestore(&dev->slock, flags);
 653
 654         do_gettimeofday(&buf->vb.v4l2_buf.timestamp);
 655
 656         /* Fill buffer */
 657         vivi_fillbuff(dev, buf);
 658         dprintk(dev, 1, "filled buffer %p\n", buf);
 659
 660         vb2_buffer_done(&buf->vb, VB2_BUF_STATE_DONE);
 661         dprintk(dev, 2, "[%p/%d] done\n", buf, buf->vb.v4l2_buf.index);
 662 }
 663
 664 #define frames_to_ms(frames)                                    \
 665         ((frames * WAKE_NUMERATOR * 1000) / WAKE_DENOMINATOR)
 666
 667 static void vivi_sleep(struct vivi_dev *dev)
 668 {
 669         struct vivi_dmaqueue *dma_q = &dev->vidq;
 670         int timeout;
 671         DECLARE_WAITQUEUE(wait, current);
 672
 673         dprintk(dev, 1, "%s dma_q=0x%08lx\n", __func__,
 674                 (unsigned long)dma_q);
 675
 676         add_wait_queue(&dma_q->wq, &wait);
 677         if (kthread_should_stop())
 678                 goto stop_task;
 679
 680         /* Calculate time to wake up */
 681         timeout = msecs_to_jiffies(frames_to_ms(1));
 682
 683         vivi_thread_tick(dev);
 684
 685         schedule_timeout_interruptible(timeout);
 686
 687 stop_task:
 688         remove_wait_queue(&dma_q->wq, &wait);
 689         try_to_freeze();
 690 }
 691
 692 static int vivi_thread(void *data)
 693 {
 694         struct vivi_dev *dev = data;
 695
 696         dprintk(dev, 1, "thread started\n");
 697
 698         set_freezable();
 699
 700         for (;;) {
 701                 vivi_sleep(dev);
 702
 703                 if (kthread_should_stop())
 704                         break;
 705         }
 706         dprintk(dev, 1, "thread: exit\n");
 707         return 0;
 708 }
 709
 710 static int vivi_start_generating(struct vivi_dev *dev)
 711 {
 712         struct vivi_dmaqueue *dma_q = &dev->vidq;
 713
 714         dprintk(dev, 1, "%s\n", __func__);
 715
 716         /* Resets frame counters */
 717         dev->ms = 0;
 718         dev->mv_count = 0;
 719         dev->jiffies = jiffies;
 720
 721         dma_q->frame = 0;
 722         dma_q->ini_jiffies = jiffies;
 723         dma_q->kthread = kthread_run(vivi_thread, dev, dev->v4l2_dev.name);
 724
 725         if (IS_ERR(dma_q->kthread)) {
 726                 v4l2_err(&dev->v4l2_dev, "kernel_thread() failed\n");
 727                 return PTR_ERR(dma_q->kthread);
 728         }
 729         /* Wakes thread */
 730         wake_up_interruptible(&dma_q->wq);
 731
 732         dprintk(dev, 1, "returning from %s\n", __func__);
 733         return 0;
 734 }
 735
 736 static void vivi_stop_generating(struct vivi_dev *dev)
 737 {
 738         struct vivi_dmaqueue *dma_q = &dev->vidq;
 739
 740         dprintk(dev, 1, "%s\n", __func__);
 741
 742         /* shutdown control thread */
 743         if (dma_q->kthread) {
 744                 kthread_stop(dma_q->kthread);
 745                 dma_q->kthread = NULL;
 746         }
 747
 748         /*
 749          * Typical driver might need to wait here until dma engine stops.
 750          * In this case we can abort imiedetly, so it's just a noop.
 751          */
 752
 753         /* Release all active buffers */
 754         while (!list_empty(&dma_q->active)) {
 755                 struct vivi_buffer *buf;
 756                 buf = list_entry(dma_q->active.next, struct vivi_buffer, list);
 757                 list_del(&buf->list);
 758                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
 759                 dprintk(dev, 2, "[%p/%d] done\n", buf, buf->vb.v4l2_buf.index);
 760         }
 761 }
 762 /* ------------------------------------------------------------------
 763         Videobuf operations
 764    ------------------------------------------------------------------*/
 765 static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
 766                                 unsigned int *nbuffers, unsigned int *nplanes,
 767                                 unsigned int sizes[], void *alloc_ctxs[])
 768 {
 769         struct vivi_dev *dev = vb2_get_drv_priv(vq);
 770         unsigned long size;
 771
 772         if (fmt)
 773                 size = fmt->fmt.pix.sizeimage;
 774         else
 775                 size = dev->width * dev->height * dev->pixelsize;
 776
 777         if (size == 0)
 778                 return -EINVAL;
 779
 780         if (0 == *nbuffers)
 781                 *nbuffers = 32;
 782
 783         while (size * *nbuffers > vid_limit * 1024 * 1024)
 784                 (*nbuffers)--;
 785
 786         *nplanes = 1;
 787
 788         sizes[0] = size;
 789
 790         /*
 791          * videobuf2-vmalloc allocator is context-less so no need to set
 792          * alloc_ctxs array.
 793          */
 794
 795         dprintk(dev, 1, "%s, count=%d, size=%ld\n", __func__,
 796                 *nbuffers, size);
 797
 798         return 0;
 799 }
 800
 801 static int buffer_prepare(struct vb2_buffer *vb)
 802 {
 803         struct vivi_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 804         struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
 805         unsigned long size;
 806
 807         dprintk(dev, 1, "%s, field=%d\n", __func__, vb->v4l2_buf.field);
 808
 809         BUG_ON(NULL == dev->fmt);
 810
 811         /*
 812          * Theses properties only change when queue is idle, see s_fmt.
 813          * The below checks should not be performed here, on each
 814          * buffer_prepare (i.e. on each qbuf). Most of the code in this function
 815          * should thus be moved to buffer_init and s_fmt.
 816          */
 817         if (dev->width  < 48 || dev->width  > MAX_WIDTH ||
 818             dev->height < 32 || dev->height > MAX_HEIGHT)
 819                 return -EINVAL;
 820
 821         size = dev->width * dev->height * dev->pixelsize;
 822         if (vb2_plane_size(vb, 0) < size) {
 823                 dprintk(dev, 1, "%s data will not fit into plane (%lu < %lu)\n",
 824                                 __func__, vb2_plane_size(vb, 0), size);
 825                 return -EINVAL;
 826         }
 827
 828         vb2_set_plane_payload(&buf->vb, 0, size);
 829
 830         buf->fmt = dev->fmt;
 831
 832         precalculate_bars(dev);
 833         precalculate_line(dev);
 834
 835         return 0;
 836 }
 837
 838 static void buffer_queue(struct vb2_buffer *vb)
 839 {
 840         struct vivi_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
 841         struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
 842         struct vivi_dmaqueue *vidq = &dev->vidq;
 843         unsigned long flags = 0;
 844
 845         dprintk(dev, 1, "%s\n", __func__);
 846
 847         spin_lock_irqsave(&dev->slock, flags);
 848         list_add_tail(&buf->list, &vidq->active);
 849         spin_unlock_irqrestore(&dev->slock, flags);
 850 }
 851
 852 static int start_streaming(struct vb2_queue *vq, unsigned int count)
 853 {
 854         struct vivi_dev *dev = vb2_get_drv_priv(vq);
 855         dprintk(dev, 1, "%s\n", __func__);
 856         return vivi_start_generating(dev);
 857 }
 858
 859 /* abort streaming and wait for last buffer */
 860 static int stop_streaming(struct vb2_queue *vq)
 861 {
 862         struct vivi_dev *dev = vb2_get_drv_priv(vq);
 863         dprintk(dev, 1, "%s\n", __func__);
 864         vivi_stop_generating(dev);
 865         return 0;
 866 }
 867
 868 static void vivi_lock(struct vb2_queue *vq)
 869 {
 870         struct vivi_dev *dev = vb2_get_drv_priv(vq);
 871         mutex_lock(&dev->mutex);
 872 }
 873
 874 static void vivi_unlock(struct vb2_queue *vq)
 875 {
 876         struct vivi_dev *dev = vb2_get_drv_priv(vq);
 877         mutex_unlock(&dev->mutex);
 878 }
 879
 880
 881 static struct vb2_ops vivi_video_qops = {
 882         .queue_setup            = queue_setup,
 883         .buf_prepare            = buffer_prepare,
 884         .buf_queue              = buffer_queue,
 885         .start_streaming        = start_streaming,
 886         .stop_streaming         = stop_streaming,
 887         .wait_prepare           = vivi_unlock,
 888         .wait_finish            = vivi_lock,
 889 };
 890
 891 /* ------------------------------------------------------------------
 892         IOCTL vidioc handling
 893    ------------------------------------------------------------------*/
 894 static int vidioc_querycap(struct file *file, void  *priv,
 895                                         struct v4l2_capability *cap)
 896 {
 897         struct vivi_dev *dev = video_drvdata(file);
 898
 899         strcpy(cap->driver, "vivi");
 900         strcpy(cap->card, "vivi");
 901         strlcpy(cap->bus_info, dev->v4l2_dev.name, sizeof(cap->bus_info));
 902         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
 903                             V4L2_CAP_READWRITE;
 904         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 905         return 0;
 906 }
 907
 908 static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
 909                                         struct v4l2_fmtdesc *f)
 910 {
 911         struct vivi_fmt *fmt;
 912
 913         if (f->index >= ARRAY_SIZE(formats))
 914                 return -EINVAL;
 915
 916         fmt = &formats[f->index];
 917
 918         strlcpy(f->description, fmt->name, sizeof(f->description));
 919         f->pixelformat = fmt->fourcc;
 920         return 0;
 921 }
 922
 923 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
 924                                         struct v4l2_format *f)
 925 {
 926         struct vivi_dev *dev = video_drvdata(file);
 927
 928         f->fmt.pix.width        = dev->width;
 929         f->fmt.pix.height       = dev->height;
 930         f->fmt.pix.field        = V4L2_FIELD_INTERLACED;
 931         f->fmt.pix.pixelformat  = dev->fmt->fourcc;
 932         f->fmt.pix.bytesperline =
 933                 (f->fmt.pix.width * dev->fmt->depth) >> 3;
 934         f->fmt.pix.sizeimage =
 935                 f->fmt.pix.height * f->fmt.pix.bytesperline;
 936         if (dev->fmt->is_yuv)
 937                 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 938         else
 939                 f->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
 940         return 0;
 941 }
 942
 943 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
 944                         struct v4l2_format *f)
 945 {
 946         struct vivi_dev *dev = video_drvdata(file);
 947         struct vivi_fmt *fmt;
 948
 949         fmt = get_format(f);
 950         if (!fmt) {
 951                 dprintk(dev, 1, "Fourcc format (0x%08x) unknown.\n",
 952                         f->fmt.pix.pixelformat);
 953                 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 954                 fmt = get_format(f);
 955         }
 956
 957         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
 958         v4l_bound_align_image(&f->fmt.pix.width, 48, MAX_WIDTH, 2,
 959                               &f->fmt.pix.height, 32, MAX_HEIGHT, 0, 0);
 960         f->fmt.pix.bytesperline =
 961                 (f->fmt.pix.width * fmt->depth) >> 3;
 962         f->fmt.pix.sizeimage =
 963                 f->fmt.pix.height * f->fmt.pix.bytesperline;
 964         if (fmt->is_yuv)
 965                 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 966         else
 967                 f->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
 968         f->fmt.pix.priv = 0;
 969         return 0;
 970 }
 971
 972 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 973                                         struct v4l2_format *f)
 974 {
 975         struct vivi_dev *dev = video_drvdata(file);
 976         struct vb2_queue *q = &dev->vb_vidq;
 977
 978         int ret = vidioc_try_fmt_vid_cap(file, priv, f);
 979         if (ret < 0)
 980                 return ret;
 981
 982         if (vb2_is_busy(q)) {
 983                 dprintk(dev, 1, "%s device busy\n", __func__);
 984                 return -EBUSY;
 985         }
 986
 987         dev->fmt = get_format(f);
 988         dev->pixelsize = dev->fmt->depth / 8;
 989         dev->width = f->fmt.pix.width;
 990         dev->height = f->fmt.pix.height;
 991
 992         return 0;
 993 }
 994
 995 static int vidioc_enum_framesizes(struct file *file, void *fh,
 996                                          struct v4l2_frmsizeenum *fsize)
 997 {
 998         static const struct v4l2_frmsize_stepwise sizes = {
 999                 48, MAX_WIDTH, 4,
1000                 32, MAX_HEIGHT, 1
1001         };
1002         int i;
1003
1004         if (fsize->index)
1005                 return -EINVAL;
1006         for (i = 0; i < ARRAY_SIZE(formats); i++)
1007                 if (formats[i].fourcc == fsize->pixel_format)
1008                         break;
1009         if (i == ARRAY_SIZE(formats))
1010                 return -EINVAL;
1011         fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
1012         fsize->stepwise = sizes;
1013         return 0;
1014 }
1015
1016 /* only one input in this sample driver */
1017 static int vidioc_enum_input(struct file *file, void *priv,
1018                                 struct v4l2_input *inp)
1019 {
1020         if (inp->index >= NUM_INPUTS)
1021                 return -EINVAL;
1022
1023         inp->type = V4L2_INPUT_TYPE_CAMERA;
1024         sprintf(inp->name, "Camera %u", inp->index);
1025         return 0;
1026 }
1027
1028 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1029 {
1030         struct vivi_dev *dev = video_drvdata(file);
1031
1032         *i = dev->input;
1033         return 0;
1034 }
1035
1036 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1037 {
1038         struct vivi_dev *dev = video_drvdata(file);
1039
1040         if (i >= NUM_INPUTS)
1041                 return -EINVAL;
1042
1043         if (i == dev->input)
1044                 return 0;
1045
1046         dev->input = i;
1047         precalculate_bars(dev);
1048         precalculate_line(dev);
1049         return 0;
1050 }
1051
1052 /* --- controls ---------------------------------------------- */
1053
1054 static int vivi_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
1055 {
1056         struct vivi_dev *dev = container_of(ctrl->handler, struct vivi_dev, ctrl_handler);
1057
1058         if (ctrl == dev->autogain)
1059                 dev->gain->val = jiffies & 0xff;
1060         return 0;
1061 }
1062
1063 static int vivi_s_ctrl(struct v4l2_ctrl *ctrl)
1064 {
1065         struct vivi_dev *dev = container_of(ctrl->handler, struct vivi_dev, ctrl_handler);
1066
1067         switch (ctrl->id) {
1068         case V4L2_CID_ALPHA_COMPONENT:
1069                 dev->alpha_component = ctrl->val;
1070                 break;
1071         default:
1072                 if (ctrl == dev->button)
1073                         dev->button_pressed = 30;
1074                 break;
1075         }
1076         return 0;
1077 }
1078
1079 /* ------------------------------------------------------------------
1080         File operations for the device
1081    ------------------------------------------------------------------*/
1082
1083 static const struct v4l2_ctrl_ops vivi_ctrl_ops = {
1084         .g_volatile_ctrl = vivi_g_volatile_ctrl,
1085         .s_ctrl = vivi_s_ctrl,
1086 };
1087
1088 #define VIVI_CID_CUSTOM_BASE    (V4L2_CID_USER_BASE | 0xf000)
1089
1090 static const struct v4l2_ctrl_config vivi_ctrl_button = {
1091         .ops = &vivi_ctrl_ops,
1092         .id = VIVI_CID_CUSTOM_BASE + 0,
1093         .name = "Button",
1094         .type = V4L2_CTRL_TYPE_BUTTON,
1095 };
1096
1097 static const struct v4l2_ctrl_config vivi_ctrl_boolean = {
1098         .ops = &vivi_ctrl_ops,
1099         .id = VIVI_CID_CUSTOM_BASE + 1,
1100         .name = "Boolean",
1101         .type = V4L2_CTRL_TYPE_BOOLEAN,
1102         .min = 0,
1103         .max = 1,
1104         .step = 1,
1105         .def = 1,
1106 };
1107
1108 static const struct v4l2_ctrl_config vivi_ctrl_int32 = {
1109         .ops = &vivi_ctrl_ops,
1110         .id = VIVI_CID_CUSTOM_BASE + 2,
1111         .name = "Integer 32 Bits",
1112         .type = V4L2_CTRL_TYPE_INTEGER,
1113         .min = 0x80000000,
1114         .max = 0x7fffffff,
1115         .step = 1,
1116 };
1117
1118 static const struct v4l2_ctrl_config vivi_ctrl_int64 = {
1119         .ops = &vivi_ctrl_ops,
1120         .id = VIVI_CID_CUSTOM_BASE + 3,
1121         .name = "Integer 64 Bits",
1122         .type = V4L2_CTRL_TYPE_INTEGER64,
1123 };
1124
1125 static const char * const vivi_ctrl_menu_strings[] = {
1126         "Menu Item 0 (Skipped)",
1127         "Menu Item 1",
1128         "Menu Item 2 (Skipped)",
1129         "Menu Item 3",
1130         "Menu Item 4",
1131         "Menu Item 5 (Skipped)",
1132         NULL,
1133 };
1134
1135 static const struct v4l2_ctrl_config vivi_ctrl_menu = {
1136         .ops = &vivi_ctrl_ops,
1137         .id = VIVI_CID_CUSTOM_BASE + 4,
1138         .name = "Menu",
1139         .type = V4L2_CTRL_TYPE_MENU,
1140         .min = 1,
1141         .max = 4,
1142         .def = 3,
1143         .menu_skip_mask = 0x04,
1144         .qmenu = vivi_ctrl_menu_strings,
1145 };
1146
1147 static const struct v4l2_ctrl_config vivi_ctrl_string = {
1148         .ops = &vivi_ctrl_ops,
1149         .id = VIVI_CID_CUSTOM_BASE + 5,
1150         .name = "String",
1151         .type = V4L2_CTRL_TYPE_STRING,
1152         .min = 2,
1153         .max = 4,
1154         .step = 1,
1155 };
1156
1157 static const struct v4l2_ctrl_config vivi_ctrl_bitmask = {
1158         .ops = &vivi_ctrl_ops,
1159         .id = VIVI_CID_CUSTOM_BASE + 6,
1160         .name = "Bitmask",
1161         .type = V4L2_CTRL_TYPE_BITMASK,
1162         .def = 0x80002000,
1163         .min = 0,
1164         .max = 0x80402010,
1165         .step = 0,
1166 };
1167
1168 static const s64 vivi_ctrl_int_menu_values[] = {
1169         1, 1, 2, 3, 5, 8, 13, 21, 42,
1170 };
1171
1172 static const struct v4l2_ctrl_config vivi_ctrl_int_menu = {
1173         .ops = &vivi_ctrl_ops,
1174         .id = VIVI_CID_CUSTOM_BASE + 7,
1175         .name = "Integer menu",
1176         .type = V4L2_CTRL_TYPE_INTEGER_MENU,
1177         .min = 1,
1178         .max = 8,
1179         .def = 4,
1180         .menu_skip_mask = 0x02,
1181         .qmenu_int = vivi_ctrl_int_menu_values,
1182 };
1183
1184 static const struct v4l2_file_operations vivi_fops = {
1185         .owner          = THIS_MODULE,
1186         .open           = v4l2_fh_open,
1187         .release        = vb2_fop_release,
1188         .read           = vb2_fop_read,
1189         .poll           = vb2_fop_poll,
1190         .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
1191         .mmap           = vb2_fop_mmap,
1192 };
1193
1194 static const struct v4l2_ioctl_ops vivi_ioctl_ops = {
1195         .vidioc_querycap      = vidioc_querycap,
1196         .vidioc_enum_fmt_vid_cap  = vidioc_enum_fmt_vid_cap,
1197         .vidioc_g_fmt_vid_cap     = vidioc_g_fmt_vid_cap,
1198         .vidioc_try_fmt_vid_cap   = vidioc_try_fmt_vid_cap,
1199         .vidioc_s_fmt_vid_cap     = vidioc_s_fmt_vid_cap,
1200         .vidioc_enum_framesizes   = vidioc_enum_framesizes,
1201         .vidioc_reqbufs       = vb2_ioctl_reqbufs,
1202         .vidioc_create_bufs   = vb2_ioctl_create_bufs,
1203         .vidioc_prepare_buf   = vb2_ioctl_prepare_buf,
1204         .vidioc_querybuf      = vb2_ioctl_querybuf,
1205         .vidioc_qbuf          = vb2_ioctl_qbuf,
1206         .vidioc_dqbuf         = vb2_ioctl_dqbuf,
1207         .vidioc_enum_input    = vidioc_enum_input,
1208         .vidioc_g_input       = vidioc_g_input,
1209         .vidioc_s_input       = vidioc_s_input,
1210         .vidioc_streamon      = vb2_ioctl_streamon,
1211         .vidioc_streamoff     = vb2_ioctl_streamoff,
1212         .vidioc_log_status    = v4l2_ctrl_log_status,
1213         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1214         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1215 };
1216
1217 static struct video_device vivi_template = {
1218         .name           = "vivi",
1219         .fops           = &vivi_fops,
1220         .ioctl_ops      = &vivi_ioctl_ops,
1221         .release        = video_device_release_empty,
1222 };
1223
1224 /* -----------------------------------------------------------------
1225         Initialization and module stuff
1226    ------------------------------------------------------------------*/
1227
1228 static int vivi_release(void)
1229 {
1230         struct vivi_dev *dev;
1231         struct list_head *list;
1232
1233         while (!list_empty(&vivi_devlist)) {
1234                 list = vivi_devlist.next;
1235                 list_del(list);
1236                 dev = list_entry(list, struct vivi_dev, vivi_devlist);
1237
1238                 v4l2_info(&dev->v4l2_dev, "unregistering %s\n",
1239                         video_device_node_name(&dev->vdev));
1240                 video_unregister_device(&dev->vdev);
1241                 v4l2_device_unregister(&dev->v4l2_dev);
1242                 v4l2_ctrl_handler_free(&dev->ctrl_handler);
1243                 kfree(dev);
1244         }
1245
1246         return 0;
1247 }
1248
1249 static int __init vivi_create_instance(int inst)
1250 {
1251         struct vivi_dev *dev;
1252         struct video_device *vfd;
1253         struct v4l2_ctrl_handler *hdl;
1254         struct vb2_queue *q;
1255         int ret;
1256
1257         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1258         if (!dev)
1259                 return -ENOMEM;
1260
1261         snprintf(dev->v4l2_dev.name, sizeof(dev->v4l2_dev.name),
1262                         "%s-%03d", VIVI_MODULE_NAME, inst);
1263         ret = v4l2_device_register(NULL, &dev->v4l2_dev);
1264         if (ret)
1265                 goto free_dev;
1266
1267         dev->fmt = &formats[0];
1268         dev->width = 640;
1269         dev->height = 480;
1270         dev->pixelsize = dev->fmt->depth / 8;
1271         hdl = &dev->ctrl_handler;
1272         v4l2_ctrl_handler_init(hdl, 11);
1273         dev->volume = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
1274                         V4L2_CID_AUDIO_VOLUME, 0, 255, 1, 200);
1275         dev->brightness = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
1276                         V4L2_CID_BRIGHTNESS, 0, 255, 1, 127);
1277         dev->contrast = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
1278                         V4L2_CID_CONTRAST, 0, 255, 1, 16);
1279         dev->saturation = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
1280                         V4L2_CID_SATURATION, 0, 255, 1, 127);
1281         dev->hue = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
1282                         V4L2_CID_HUE, -128, 127, 1, 0);
1283         dev->autogain = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
1284                         V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
1285         dev->gain = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
1286                         V4L2_CID_GAIN, 0, 255, 1, 100);
1287         dev->alpha = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
1288                         V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 0);
1289         dev->button = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_button, NULL);
1290         dev->int32 = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_int32, NULL);
1291         dev->int64 = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_int64, NULL);
1292         dev->boolean = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_boolean, NULL);
1293         dev->menu = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_menu, NULL);
1294         dev->string = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_string, NULL);
1295         dev->bitmask = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_bitmask, NULL);
1296         dev->int_menu = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_int_menu, NULL);
1297         if (hdl->error) {
1298                 ret = hdl->error;
1299                 goto unreg_dev;
1300         }
1301         v4l2_ctrl_auto_cluster(2, &dev->autogain, 0, true);
1302         dev->v4l2_dev.ctrl_handler = hdl;
1303
1304         /* initialize locks */
1305         spin_lock_init(&dev->slock);
1306
1307         /* initialize queue */
1308         q = &dev->vb_vidq;
1309         memset(q, 0, sizeof(dev->vb_vidq));
1310         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1311         q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1312         q->drv_priv = dev;
1313         q->buf_struct_size = sizeof(struct vivi_buffer);
1314         q->ops = &vivi_video_qops;
1315         q->mem_ops = &vb2_vmalloc_memops;
1316
1317         vb2_queue_init(q);
1318
1319         mutex_init(&dev->mutex);
1320
1321         /* init video dma queues */
1322         INIT_LIST_HEAD(&dev->vidq.active);
1323         init_waitqueue_head(&dev->vidq.wq);
1324
1325         vfd = &dev->vdev;
1326         *vfd = vivi_template;
1327         vfd->debug = debug;
1328         vfd->v4l2_dev = &dev->v4l2_dev;
1329         vfd->queue = q;
1330         set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
1331
1332         /*
1333          * Provide a mutex to v4l2 core. It will be used to protect
1334          * all fops and v4l2 ioctls.
1335          */
1336         vfd->lock = &dev->mutex;
1337         video_set_drvdata(vfd, dev);
1338
1339         ret = video_register_device(vfd, VFL_TYPE_GRABBER, video_nr);
1340         if (ret < 0)
1341                 goto unreg_dev;
1342
1343         /* Now that everything is fine, let's add it to device list */
1344         list_add_tail(&dev->vivi_devlist, &vivi_devlist);
1345
1346         v4l2_info(&dev->v4l2_dev, "V4L2 device registered as %s\n",
1347                   video_device_node_name(vfd));
1348         return 0;
1349
1350 unreg_dev:
1351         v4l2_ctrl_handler_free(hdl);
1352         v4l2_device_unregister(&dev->v4l2_dev);
1353 free_dev:
1354         kfree(dev);
1355         return ret;
1356 }
1357
1358 /* This routine allocates from 1 to n_devs virtual drivers.
1359
1360    The real maximum number of virtual drivers will depend on how many drivers
1361    will succeed. This is limited to the maximum number of devices that
1362    videodev supports, which is equal to VIDEO_NUM_DEVICES.
1363  */
1364 static int __init vivi_init(void)
1365 {
1366         const struct font_desc *font = find_font("VGA8x16");
1367         int ret = 0, i;
1368
1369         if (font == NULL) {
1370                 printk(KERN_ERR "vivi: could not find font\n");
1371                 return -ENODEV;
1372         }
1373         font8x16 = font->data;
1374
1375         if (n_devs <= 0)
1376                 n_devs = 1;
1377
1378         for (i = 0; i < n_devs; i++) {
1379                 ret = vivi_create_instance(i);
1380                 if (ret) {
1381                         /* If some instantiations succeeded, keep driver */
1382                         if (i)
1383                                 ret = 0;
1384                         break;
1385                 }
1386         }
1387
1388         if (ret < 0) {
1389                 printk(KERN_ERR "vivi: error %d while loading driver\n", ret);
1390                 return ret;
1391         }
1392
1393         printk(KERN_INFO "Video Technology Magazine Virtual Video "
1394                         "Capture Board ver %s successfully loaded.\n",
1395                         VIVI_VERSION);
1396
1397         /* n_devs will reflect the actual number of allocated devices */
1398         n_devs = i;
1399
1400         return ret;
1401 }
1402
1403 static void __exit vivi_exit(void)
1404 {
1405         vivi_release();
1406 }
1407
1408 module_init(vivi_init);
1409 module_exit(vivi_exit);