drivers/media/pci/solo6x10/solo6x10-v4l2.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2010-2013 Bluecherry, LLC <https://www.bluecherrydvr.com>
   4  *
   5  * Original author:
   6  * Ben Collins <bcollins@ubuntu.com>
   7  *
   8  * Additional work by:
   9  * John Brooks <john.brooks@bluecherry.net>
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/module.h>
  14 #include <linux/kthread.h>
  15 #include <linux/freezer.h>
  16
  17 #include <media/v4l2-ioctl.h>
  18 #include <media/v4l2-common.h>
  19 #include <media/v4l2-event.h>
  20 #include <media/videobuf2-v4l2.h>
  21 #include <media/videobuf2-dma-contig.h>
  22
  23 #include "solo6x10.h"
  24 #include "solo6x10-tw28.h"
  25
  26 /* Image size is two fields, SOLO_HW_BPL is one horizontal line in hardware */
  27 #define SOLO_HW_BPL             2048
  28 #define solo_vlines(__solo)     (__solo->video_vsize * 2)
  29 #define solo_image_size(__solo) (solo_bytesperline(__solo) * \
  30                                  solo_vlines(__solo))
  31 #define solo_bytesperline(__solo) (__solo->video_hsize * 2)
  32
  33 #define MIN_VID_BUFFERS         2
  34
  35 static inline void erase_on(struct solo_dev *solo_dev)
  36 {
  37         solo_reg_write(solo_dev, SOLO_VO_DISP_ERASE, SOLO_VO_DISP_ERASE_ON);
  38         solo_dev->erasing = 1;
  39         solo_dev->frame_blank = 0;
  40 }
  41
  42 static inline int erase_off(struct solo_dev *solo_dev)
  43 {
  44         if (!solo_dev->erasing)
  45                 return 0;
  46
  47         /* First time around, assert erase off */
  48         if (!solo_dev->frame_blank)
  49                 solo_reg_write(solo_dev, SOLO_VO_DISP_ERASE, 0);
  50         /* Keep the erasing flag on for 8 frames minimum */
  51         if (solo_dev->frame_blank++ >= 8)
  52                 solo_dev->erasing = 0;
  53
  54         return 1;
  55 }
  56
  57 void solo_video_in_isr(struct solo_dev *solo_dev)
  58 {
  59         wake_up_interruptible_all(&solo_dev->disp_thread_wait);
  60 }
  61
  62 static void solo_win_setup(struct solo_dev *solo_dev, u8 ch,
  63                            int sx, int sy, int ex, int ey, int scale)
  64 {
  65         if (ch >= solo_dev->nr_chans)
  66                 return;
  67
  68         /* Here, we just keep window/channel the same */
  69         solo_reg_write(solo_dev, SOLO_VI_WIN_CTRL0(ch),
  70                        SOLO_VI_WIN_CHANNEL(ch) |
  71                        SOLO_VI_WIN_SX(sx) |
  72                        SOLO_VI_WIN_EX(ex) |
  73                        SOLO_VI_WIN_SCALE(scale));
  74
  75         solo_reg_write(solo_dev, SOLO_VI_WIN_CTRL1(ch),
  76                        SOLO_VI_WIN_SY(sy) |
  77                        SOLO_VI_WIN_EY(ey));
  78 }
  79
  80 static int solo_v4l2_ch_ext_4up(struct solo_dev *solo_dev, u8 idx, int on)
  81 {
  82         u8 ch = idx * 4;
  83
  84         if (ch >= solo_dev->nr_chans)
  85                 return -EINVAL;
  86
  87         if (!on) {
  88                 u8 i;
  89
  90                 for (i = ch; i < ch + 4; i++)
  91                         solo_win_setup(solo_dev, i, solo_dev->video_hsize,
  92                                        solo_vlines(solo_dev),
  93                                        solo_dev->video_hsize,
  94                                        solo_vlines(solo_dev), 0);
  95                 return 0;
  96         }
  97
  98         /* Row 1 */
  99         solo_win_setup(solo_dev, ch, 0, 0, solo_dev->video_hsize / 2,
 100                        solo_vlines(solo_dev) / 2, 3);
 101         solo_win_setup(solo_dev, ch + 1, solo_dev->video_hsize / 2, 0,
 102                        solo_dev->video_hsize, solo_vlines(solo_dev) / 2, 3);
 103         /* Row 2 */
 104         solo_win_setup(solo_dev, ch + 2, 0, solo_vlines(solo_dev) / 2,
 105                        solo_dev->video_hsize / 2, solo_vlines(solo_dev), 3);
 106         solo_win_setup(solo_dev, ch + 3, solo_dev->video_hsize / 2,
 107                        solo_vlines(solo_dev) / 2, solo_dev->video_hsize,
 108                        solo_vlines(solo_dev), 3);
 109
 110         return 0;
 111 }
 112
 113 static int solo_v4l2_ch_ext_16up(struct solo_dev *solo_dev, int on)
 114 {
 115         int sy, ysize, hsize, i;
 116
 117         if (!on) {
 118                 for (i = 0; i < 16; i++)
 119                         solo_win_setup(solo_dev, i, solo_dev->video_hsize,
 120                                        solo_vlines(solo_dev),
 121                                        solo_dev->video_hsize,
 122                                        solo_vlines(solo_dev), 0);
 123                 return 0;
 124         }
 125
 126         ysize = solo_vlines(solo_dev) / 4;
 127         hsize = solo_dev->video_hsize / 4;
 128
 129         for (sy = 0, i = 0; i < 4; i++, sy += ysize) {
 130                 solo_win_setup(solo_dev, i * 4, 0, sy, hsize,
 131                                sy + ysize, 5);
 132                 solo_win_setup(solo_dev, (i * 4) + 1, hsize, sy,
 133                                hsize * 2, sy + ysize, 5);
 134                 solo_win_setup(solo_dev, (i * 4) + 2, hsize * 2, sy,
 135                                hsize * 3, sy + ysize, 5);
 136                 solo_win_setup(solo_dev, (i * 4) + 3, hsize * 3, sy,
 137                                solo_dev->video_hsize, sy + ysize, 5);
 138         }
 139
 140         return 0;
 141 }
 142
 143 static int solo_v4l2_ch(struct solo_dev *solo_dev, u8 ch, int on)
 144 {
 145         u8 ext_ch;
 146
 147         if (ch < solo_dev->nr_chans) {
 148                 solo_win_setup(solo_dev, ch, on ? 0 : solo_dev->video_hsize,
 149                                on ? 0 : solo_vlines(solo_dev),
 150                                solo_dev->video_hsize, solo_vlines(solo_dev),
 151                                on ? 1 : 0);
 152                 return 0;
 153         }
 154
 155         if (ch >= solo_dev->nr_chans + solo_dev->nr_ext)
 156                 return -EINVAL;
 157
 158         ext_ch = ch - solo_dev->nr_chans;
 159
 160         /* 4up's first */
 161         if (ext_ch < 4)
 162                 return solo_v4l2_ch_ext_4up(solo_dev, ext_ch, on);
 163
 164         /* Remaining case is 16up for 16-port */
 165         return solo_v4l2_ch_ext_16up(solo_dev, on);
 166 }
 167
 168 static int solo_v4l2_set_ch(struct solo_dev *solo_dev, u8 ch)
 169 {
 170         if (ch >= solo_dev->nr_chans + solo_dev->nr_ext)
 171                 return -EINVAL;
 172
 173         erase_on(solo_dev);
 174
 175         solo_v4l2_ch(solo_dev, solo_dev->cur_disp_ch, 0);
 176         solo_v4l2_ch(solo_dev, ch, 1);
 177
 178         solo_dev->cur_disp_ch = ch;
 179
 180         return 0;
 181 }
 182
 183 static void solo_fillbuf(struct solo_dev *solo_dev,
 184                          struct vb2_buffer *vb)
 185 {
 186         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 187         dma_addr_t addr;
 188         unsigned int fdma_addr;
 189         int error = -1;
 190         int i;
 191
 192         addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 193         if (!addr)
 194                 goto finish_buf;
 195
 196         if (erase_off(solo_dev)) {
 197                 void *p = vb2_plane_vaddr(vb, 0);
 198                 int image_size = solo_image_size(solo_dev);
 199
 200                 for (i = 0; i < image_size; i += 2) {
 201                         ((u8 *)p)[i] = 0x80;
 202                         ((u8 *)p)[i + 1] = 0x00;
 203                 }
 204                 error = 0;
 205         } else {
 206                 fdma_addr = SOLO_DISP_EXT_ADDR + (solo_dev->old_write *
 207                                 (SOLO_HW_BPL * solo_vlines(solo_dev)));
 208
 209                 error = solo_p2m_dma_t(solo_dev, 0, addr, fdma_addr,
 210                                        solo_bytesperline(solo_dev),
 211                                        solo_vlines(solo_dev), SOLO_HW_BPL);
 212         }
 213
 214 finish_buf:
 215         if (!error) {
 216                 vb2_set_plane_payload(vb, 0,
 217                         solo_vlines(solo_dev) * solo_bytesperline(solo_dev));
 218                 vbuf->sequence = solo_dev->sequence++;
 219                 vb->timestamp = ktime_get_ns();
 220         }
 221
 222         vb2_buffer_done(vb, error ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
 223 }
 224
 225 static void solo_thread_try(struct solo_dev *solo_dev)
 226 {
 227         struct solo_vb2_buf *vb;
 228
 229         /* Only "break" from this loop if slock is held, otherwise
 230          * just return. */
 231         for (;;) {
 232                 unsigned int cur_write;
 233
 234                 cur_write = SOLO_VI_STATUS0_PAGE(
 235                         solo_reg_read(solo_dev, SOLO_VI_STATUS0));
 236                 if (cur_write == solo_dev->old_write)
 237                         return;
 238
 239                 spin_lock(&solo_dev->slock);
 240
 241                 if (list_empty(&solo_dev->vidq_active))
 242                         break;
 243
 244                 vb = list_first_entry(&solo_dev->vidq_active, struct solo_vb2_buf,
 245                                       list);
 246
 247                 solo_dev->old_write = cur_write;
 248                 list_del(&vb->list);
 249
 250                 spin_unlock(&solo_dev->slock);
 251
 252                 solo_fillbuf(solo_dev, &vb->vb.vb2_buf);
 253         }
 254
 255         assert_spin_locked(&solo_dev->slock);
 256         spin_unlock(&solo_dev->slock);
 257 }
 258
 259 static int solo_thread(void *data)
 260 {
 261         struct solo_dev *solo_dev = data;
 262         DECLARE_WAITQUEUE(wait, current);
 263
 264         set_freezable();
 265         add_wait_queue(&solo_dev->disp_thread_wait, &wait);
 266
 267         for (;;) {
 268                 long timeout = schedule_timeout_interruptible(HZ);
 269
 270                 if (timeout == -ERESTARTSYS || kthread_should_stop())
 271                         break;
 272                 solo_thread_try(solo_dev);
 273                 try_to_freeze();
 274         }
 275
 276         remove_wait_queue(&solo_dev->disp_thread_wait, &wait);
 277
 278         return 0;
 279 }
 280
 281 static int solo_start_thread(struct solo_dev *solo_dev)
 282 {
 283         int ret = 0;
 284
 285         solo_dev->kthread = kthread_run(solo_thread, solo_dev, SOLO6X10_NAME "_disp");
 286
 287         if (IS_ERR(solo_dev->kthread)) {
 288                 ret = PTR_ERR(solo_dev->kthread);
 289                 solo_dev->kthread = NULL;
 290                 return ret;
 291         }
 292         solo_irq_on(solo_dev, SOLO_IRQ_VIDEO_IN);
 293
 294         return ret;
 295 }
 296
 297 static void solo_stop_thread(struct solo_dev *solo_dev)
 298 {
 299         if (!solo_dev->kthread)
 300                 return;
 301
 302         solo_irq_off(solo_dev, SOLO_IRQ_VIDEO_IN);
 303         kthread_stop(solo_dev->kthread);
 304         solo_dev->kthread = NULL;
 305 }
 306
 307 static int solo_queue_setup(struct vb2_queue *q,
 308                            unsigned int *num_buffers, unsigned int *num_planes,
 309                            unsigned int sizes[], struct device *alloc_devs[])
 310 {
 311         struct solo_dev *solo_dev = vb2_get_drv_priv(q);
 312
 313         sizes[0] = solo_image_size(solo_dev);
 314         *num_planes = 1;
 315
 316         if (*num_buffers < MIN_VID_BUFFERS)
 317                 *num_buffers = MIN_VID_BUFFERS;
 318
 319         return 0;
 320 }
 321
 322 static int solo_start_streaming(struct vb2_queue *q, unsigned int count)
 323 {
 324         struct solo_dev *solo_dev = vb2_get_drv_priv(q);
 325
 326         solo_dev->sequence = 0;
 327         return solo_start_thread(solo_dev);
 328 }
 329
 330 static void solo_stop_streaming(struct vb2_queue *q)
 331 {
 332         struct solo_dev *solo_dev = vb2_get_drv_priv(q);
 333
 334         solo_stop_thread(solo_dev);
 335
 336         spin_lock(&solo_dev->slock);
 337         while (!list_empty(&solo_dev->vidq_active)) {
 338                 struct solo_vb2_buf *buf = list_entry(
 339                                 solo_dev->vidq_active.next,
 340                                 struct solo_vb2_buf, list);
 341
 342                 list_del(&buf->list);
 343                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 344         }
 345         spin_unlock(&solo_dev->slock);
 346         INIT_LIST_HEAD(&solo_dev->vidq_active);
 347 }
 348
 349 static void solo_buf_queue(struct vb2_buffer *vb)
 350 {
 351         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 352         struct vb2_queue *vq = vb->vb2_queue;
 353         struct solo_dev *solo_dev = vb2_get_drv_priv(vq);
 354         struct solo_vb2_buf *solo_vb =
 355                 container_of(vbuf, struct solo_vb2_buf, vb);
 356
 357         spin_lock(&solo_dev->slock);
 358         list_add_tail(&solo_vb->list, &solo_dev->vidq_active);
 359         spin_unlock(&solo_dev->slock);
 360         wake_up_interruptible(&solo_dev->disp_thread_wait);
 361 }
 362
 363 static const struct vb2_ops solo_video_qops = {
 364         .queue_setup    = solo_queue_setup,
 365         .buf_queue      = solo_buf_queue,
 366         .start_streaming = solo_start_streaming,
 367         .stop_streaming = solo_stop_streaming,
 368 };
 369
 370 static int solo_querycap(struct file *file, void  *priv,
 371                          struct v4l2_capability *cap)
 372 {
 373         strscpy(cap->driver, SOLO6X10_NAME, sizeof(cap->driver));
 374         strscpy(cap->card, "Softlogic 6x10", sizeof(cap->card));
 375         return 0;
 376 }
 377
 378 static int solo_enum_ext_input(struct solo_dev *solo_dev,
 379                                struct v4l2_input *input)
 380 {
 381         int ext = input->index - solo_dev->nr_chans;
 382         unsigned int nup, first;
 383
 384         if (ext >= solo_dev->nr_ext)
 385                 return -EINVAL;
 386
 387         nup   = (ext == 4) ? 16 : 4;
 388         first = (ext & 3) << 2; /* first channel in the n-up */
 389         snprintf(input->name, sizeof(input->name),
 390                  "Multi %d-up (cameras %d-%d)",
 391                  nup, first + 1, first + nup);
 392         /* Possible outputs:
 393          *  Multi 4-up (cameras 1-4)
 394          *  Multi 4-up (cameras 5-8)
 395          *  Multi 4-up (cameras 9-12)
 396          *  Multi 4-up (cameras 13-16)
 397          *  Multi 16-up (cameras 1-16)
 398          */
 399         return 0;
 400 }
 401
 402 static int solo_enum_input(struct file *file, void *priv,
 403                            struct v4l2_input *input)
 404 {
 405         struct solo_dev *solo_dev = video_drvdata(file);
 406
 407         if (input->index >= solo_dev->nr_chans) {
 408                 int ret = solo_enum_ext_input(solo_dev, input);
 409
 410                 if (ret < 0)
 411                         return ret;
 412         } else {
 413                 snprintf(input->name, sizeof(input->name), "Camera %d",
 414                          input->index + 1);
 415
 416                 /* We can only check this for normal inputs */
 417                 if (!tw28_get_video_status(solo_dev, input->index))
 418                         input->status = V4L2_IN_ST_NO_SIGNAL;
 419         }
 420
 421         input->type = V4L2_INPUT_TYPE_CAMERA;
 422         input->std = solo_dev->vfd->tvnorms;
 423         return 0;
 424 }
 425
 426 static int solo_set_input(struct file *file, void *priv, unsigned int index)
 427 {
 428         struct solo_dev *solo_dev = video_drvdata(file);
 429         int ret = solo_v4l2_set_ch(solo_dev, index);
 430
 431         if (!ret) {
 432                 while (erase_off(solo_dev))
 433                         /* Do nothing */;
 434         }
 435
 436         return ret;
 437 }
 438
 439 static int solo_get_input(struct file *file, void *priv, unsigned int *index)
 440 {
 441         struct solo_dev *solo_dev = video_drvdata(file);
 442
 443         *index = solo_dev->cur_disp_ch;
 444
 445         return 0;
 446 }
 447
 448 static int solo_enum_fmt_cap(struct file *file, void *priv,
 449                              struct v4l2_fmtdesc *f)
 450 {
 451         if (f->index)
 452                 return -EINVAL;
 453
 454         f->pixelformat = V4L2_PIX_FMT_UYVY;
 455         return 0;
 456 }
 457
 458 static int solo_try_fmt_cap(struct file *file, void *priv,
 459                             struct v4l2_format *f)
 460 {
 461         struct solo_dev *solo_dev = video_drvdata(file);
 462         struct v4l2_pix_format *pix = &f->fmt.pix;
 463         int image_size = solo_image_size(solo_dev);
 464
 465         if (pix->pixelformat != V4L2_PIX_FMT_UYVY)
 466                 return -EINVAL;
 467
 468         pix->width = solo_dev->video_hsize;
 469         pix->height = solo_vlines(solo_dev);
 470         pix->sizeimage = image_size;
 471         pix->field = V4L2_FIELD_INTERLACED;
 472         pix->pixelformat = V4L2_PIX_FMT_UYVY;
 473         pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
 474         return 0;
 475 }
 476
 477 static int solo_set_fmt_cap(struct file *file, void *priv,
 478                             struct v4l2_format *f)
 479 {
 480         struct solo_dev *solo_dev = video_drvdata(file);
 481
 482         if (vb2_is_busy(&solo_dev->vidq))
 483                 return -EBUSY;
 484
 485         /* For right now, if it doesn't match our running config,
 486          * then fail */
 487         return solo_try_fmt_cap(file, priv, f);
 488 }
 489
 490 static int solo_get_fmt_cap(struct file *file, void *priv,
 491                             struct v4l2_format *f)
 492 {
 493         struct solo_dev *solo_dev = video_drvdata(file);
 494         struct v4l2_pix_format *pix = &f->fmt.pix;
 495
 496         pix->width = solo_dev->video_hsize;
 497         pix->height = solo_vlines(solo_dev);
 498         pix->pixelformat = V4L2_PIX_FMT_UYVY;
 499         pix->field = V4L2_FIELD_INTERLACED;
 500         pix->sizeimage = solo_image_size(solo_dev);
 501         pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
 502         pix->bytesperline = solo_bytesperline(solo_dev);
 503
 504         return 0;
 505 }
 506
 507 static int solo_g_std(struct file *file, void *priv, v4l2_std_id *i)
 508 {
 509         struct solo_dev *solo_dev = video_drvdata(file);
 510
 511         if (solo_dev->video_type == SOLO_VO_FMT_TYPE_NTSC)
 512                 *i = V4L2_STD_NTSC_M;
 513         else
 514                 *i = V4L2_STD_PAL;
 515         return 0;
 516 }
 517
 518 int solo_set_video_type(struct solo_dev *solo_dev, bool is_50hz)
 519 {
 520         int i;
 521
 522         /* Make sure all video nodes are idle */
 523         if (vb2_is_busy(&solo_dev->vidq))
 524                 return -EBUSY;
 525         for (i = 0; i < solo_dev->nr_chans; i++)
 526                 if (vb2_is_busy(&solo_dev->v4l2_enc[i]->vidq))
 527                         return -EBUSY;
 528         solo_dev->video_type = is_50hz ? SOLO_VO_FMT_TYPE_PAL :
 529                                          SOLO_VO_FMT_TYPE_NTSC;
 530         /* Reconfigure for the new standard */
 531         solo_disp_init(solo_dev);
 532         solo_enc_init(solo_dev);
 533         solo_tw28_init(solo_dev);
 534         for (i = 0; i < solo_dev->nr_chans; i++)
 535                 solo_update_mode(solo_dev->v4l2_enc[i]);
 536         return solo_v4l2_set_ch(solo_dev, solo_dev->cur_disp_ch);
 537 }
 538
 539 static int solo_s_std(struct file *file, void *priv, v4l2_std_id std)
 540 {
 541         struct solo_dev *solo_dev = video_drvdata(file);
 542
 543         return solo_set_video_type(solo_dev, std & V4L2_STD_625_50);
 544 }
 545
 546 static int solo_s_ctrl(struct v4l2_ctrl *ctrl)
 547 {
 548         struct solo_dev *solo_dev =
 549                 container_of(ctrl->handler, struct solo_dev, disp_hdl);
 550
 551         switch (ctrl->id) {
 552         case V4L2_CID_MOTION_TRACE:
 553                 if (ctrl->val) {
 554                         solo_reg_write(solo_dev, SOLO_VI_MOTION_BORDER,
 555                                         SOLO_VI_MOTION_Y_ADD |
 556                                         SOLO_VI_MOTION_Y_VALUE(0x20) |
 557                                         SOLO_VI_MOTION_CB_VALUE(0x10) |
 558                                         SOLO_VI_MOTION_CR_VALUE(0x10));
 559                         solo_reg_write(solo_dev, SOLO_VI_MOTION_BAR,
 560                                         SOLO_VI_MOTION_CR_ADD |
 561                                         SOLO_VI_MOTION_Y_VALUE(0x10) |
 562                                         SOLO_VI_MOTION_CB_VALUE(0x80) |
 563                                         SOLO_VI_MOTION_CR_VALUE(0x10));
 564                 } else {
 565                         solo_reg_write(solo_dev, SOLO_VI_MOTION_BORDER, 0);
 566                         solo_reg_write(solo_dev, SOLO_VI_MOTION_BAR, 0);
 567                 }
 568                 return 0;
 569         default:
 570                 break;
 571         }
 572         return -EINVAL;
 573 }
 574
 575 static const struct v4l2_file_operations solo_v4l2_fops = {
 576         .owner                  = THIS_MODULE,
 577         .open                   = v4l2_fh_open,
 578         .release                = vb2_fop_release,
 579         .read                   = vb2_fop_read,
 580         .poll                   = vb2_fop_poll,
 581         .mmap                   = vb2_fop_mmap,
 582         .unlocked_ioctl         = video_ioctl2,
 583 };
 584
 585 static const struct v4l2_ioctl_ops solo_v4l2_ioctl_ops = {
 586         .vidioc_querycap                = solo_querycap,
 587         .vidioc_s_std                   = solo_s_std,
 588         .vidioc_g_std                   = solo_g_std,
 589         /* Input callbacks */
 590         .vidioc_enum_input              = solo_enum_input,
 591         .vidioc_s_input                 = solo_set_input,
 592         .vidioc_g_input                 = solo_get_input,
 593         /* Video capture format callbacks */
 594         .vidioc_enum_fmt_vid_cap        = solo_enum_fmt_cap,
 595         .vidioc_try_fmt_vid_cap         = solo_try_fmt_cap,
 596         .vidioc_s_fmt_vid_cap           = solo_set_fmt_cap,
 597         .vidioc_g_fmt_vid_cap           = solo_get_fmt_cap,
 598         /* Streaming I/O */
 599         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
 600         .vidioc_querybuf                = vb2_ioctl_querybuf,
 601         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 602         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 603         .vidioc_streamon                = vb2_ioctl_streamon,
 604         .vidioc_streamoff               = vb2_ioctl_streamoff,
 605         /* Logging and events */
 606         .vidioc_log_status              = v4l2_ctrl_log_status,
 607         .vidioc_subscribe_event         = v4l2_ctrl_subscribe_event,
 608         .vidioc_unsubscribe_event       = v4l2_event_unsubscribe,
 609 };
 610
 611 static const struct video_device solo_v4l2_template = {
 612         .name                   = SOLO6X10_NAME,
 613         .fops                   = &solo_v4l2_fops,
 614         .ioctl_ops              = &solo_v4l2_ioctl_ops,
 615         .minor                  = -1,
 616         .release                = video_device_release,
 617         .tvnorms                = V4L2_STD_NTSC_M | V4L2_STD_PAL,
 618         .device_caps            = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
 619                                   V4L2_CAP_STREAMING,
 620 };
 621
 622 static const struct v4l2_ctrl_ops solo_ctrl_ops = {
 623         .s_ctrl = solo_s_ctrl,
 624 };
 625
 626 static const struct v4l2_ctrl_config solo_motion_trace_ctrl = {
 627         .ops = &solo_ctrl_ops,
 628         .id = V4L2_CID_MOTION_TRACE,
 629         .name = "Motion Detection Trace",
 630         .type = V4L2_CTRL_TYPE_BOOLEAN,
 631         .max = 1,
 632         .step = 1,
 633 };
 634
 635 int solo_v4l2_init(struct solo_dev *solo_dev, unsigned nr)
 636 {
 637         int ret;
 638         int i;
 639
 640         init_waitqueue_head(&solo_dev->disp_thread_wait);
 641         spin_lock_init(&solo_dev->slock);
 642         mutex_init(&solo_dev->lock);
 643         INIT_LIST_HEAD(&solo_dev->vidq_active);
 644
 645         solo_dev->vfd = video_device_alloc();
 646         if (!solo_dev->vfd)
 647                 return -ENOMEM;
 648
 649         *solo_dev->vfd = solo_v4l2_template;
 650         solo_dev->vfd->v4l2_dev = &solo_dev->v4l2_dev;
 651         solo_dev->vfd->queue = &solo_dev->vidq;
 652         solo_dev->vfd->lock = &solo_dev->lock;
 653         v4l2_ctrl_handler_init(&solo_dev->disp_hdl, 1);
 654         v4l2_ctrl_new_custom(&solo_dev->disp_hdl, &solo_motion_trace_ctrl, NULL);
 655         if (solo_dev->disp_hdl.error) {
 656                 ret = solo_dev->disp_hdl.error;
 657                 goto fail;
 658         }
 659         solo_dev->vfd->ctrl_handler = &solo_dev->disp_hdl;
 660
 661         video_set_drvdata(solo_dev->vfd, solo_dev);
 662
 663         solo_dev->vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 664         solo_dev->vidq.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
 665         solo_dev->vidq.ops = &solo_video_qops;
 666         solo_dev->vidq.mem_ops = &vb2_dma_contig_memops;
 667         solo_dev->vidq.drv_priv = solo_dev;
 668         solo_dev->vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 669         solo_dev->vidq.gfp_flags = __GFP_DMA32 | __GFP_KSWAPD_RECLAIM;
 670         solo_dev->vidq.buf_struct_size = sizeof(struct solo_vb2_buf);
 671         solo_dev->vidq.lock = &solo_dev->lock;
 672         solo_dev->vidq.dev = &solo_dev->pdev->dev;
 673         ret = vb2_queue_init(&solo_dev->vidq);
 674         if (ret < 0)
 675                 goto fail;
 676
 677         /* Cycle all the channels and clear */
 678         for (i = 0; i < solo_dev->nr_chans; i++) {
 679                 solo_v4l2_set_ch(solo_dev, i);
 680                 while (erase_off(solo_dev))
 681                         /* Do nothing */;
 682         }
 683
 684         /* Set the default display channel */
 685         solo_v4l2_set_ch(solo_dev, 0);
 686         while (erase_off(solo_dev))
 687                 /* Do nothing */;
 688
 689         ret = video_register_device(solo_dev->vfd, VFL_TYPE_VIDEO, nr);
 690         if (ret < 0)
 691                 goto fail;
 692
 693         snprintf(solo_dev->vfd->name, sizeof(solo_dev->vfd->name), "%s (%i)",
 694                  SOLO6X10_NAME, solo_dev->vfd->num);
 695
 696         dev_info(&solo_dev->pdev->dev, "Display as /dev/video%d with %d inputs (%d extended)\n",
 697                  solo_dev->vfd->num,
 698                  solo_dev->nr_chans, solo_dev->nr_ext);
 699
 700         return 0;
 701
 702 fail:
 703         video_device_release(solo_dev->vfd);
 704         v4l2_ctrl_handler_free(&solo_dev->disp_hdl);
 705         solo_dev->vfd = NULL;
 706         return ret;
 707 }
 708
 709 void solo_v4l2_exit(struct solo_dev *solo_dev)
 710 {
 711         if (solo_dev->vfd == NULL)
 712                 return;
 713
 714         video_unregister_device(solo_dev->vfd);
 715         v4l2_ctrl_handler_free(&solo_dev->disp_hdl);
 716         solo_dev->vfd = NULL;
 717 }