drivers/media/pci/cx25821/cx25821-video.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Driver for the Conexant CX25821 PCIe bridge
   4  *
   5  *  Copyright (C) 2009 Conexant Systems Inc.
   6  *  Authors  <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
   7  *  Based on Steven Toth <stoth@linuxtv.org> cx25821 driver
   8  *  Parts adapted/taken from Eduardo Moscoso Rubino
   9  *  Copyright (C) 2009 Eduardo Moscoso Rubino <moscoso@TopoLogica.com>
  10  */
  11
  12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  13
  14 #include "cx25821-video.h"
  15
  16 MODULE_DESCRIPTION("v4l2 driver module for cx25821 based TV cards");
  17 MODULE_AUTHOR("Hiep Huynh <hiep.huynh@conexant.com>");
  18 MODULE_LICENSE("GPL");
  19
  20 static unsigned int video_nr[] = {[0 ... (CX25821_MAXBOARDS - 1)] = UNSET };
  21
  22 module_param_array(video_nr, int, NULL, 0444);
  23
  24 MODULE_PARM_DESC(video_nr, "video device numbers");
  25
  26 static unsigned int video_debug = VIDEO_DEBUG;
  27 module_param(video_debug, int, 0644);
  28 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
  29
  30 static unsigned int irq_debug;
  31 module_param(irq_debug, int, 0644);
  32 MODULE_PARM_DESC(irq_debug, "enable debug messages [IRQ handler]");
  33
  34 #define FORMAT_FLAGS_PACKED       0x01
  35
  36 static const struct cx25821_fmt formats[] = {
  37         {
  38                 .name = "4:1:1, packed, Y41P",
  39                 .fourcc = V4L2_PIX_FMT_Y41P,
  40                 .depth = 12,
  41                 .flags = FORMAT_FLAGS_PACKED,
  42         }, {
  43                 .name = "4:2:2, packed, YUYV",
  44                 .fourcc = V4L2_PIX_FMT_YUYV,
  45                 .depth = 16,
  46                 .flags = FORMAT_FLAGS_PACKED,
  47         },
  48 };
  49
  50 static const struct cx25821_fmt *cx25821_format_by_fourcc(unsigned int fourcc)
  51 {
  52         unsigned int i;
  53
  54         for (i = 0; i < ARRAY_SIZE(formats); i++)
  55                 if (formats[i].fourcc == fourcc)
  56                         return formats + i;
  57         return NULL;
  58 }
  59
  60 int cx25821_start_video_dma(struct cx25821_dev *dev,
  61                             struct cx25821_dmaqueue *q,
  62                             struct cx25821_buffer *buf,
  63                             const struct sram_channel *channel)
  64 {
  65         int tmp = 0;
  66
  67         /* setup fifo + format */
  68         cx25821_sram_channel_setup(dev, channel, buf->bpl, buf->risc.dma);
  69
  70         /* reset counter */
  71         cx_write(channel->gpcnt_ctl, 3);
  72
  73         /* enable irq */
  74         cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << channel->i));
  75         cx_set(channel->int_msk, 0x11);
  76
  77         /* start dma */
  78         cx_write(channel->dma_ctl, 0x11);       /* FIFO and RISC enable */
  79
  80         /* make sure upstream setting if any is reversed */
  81         tmp = cx_read(VID_CH_MODE_SEL);
  82         cx_write(VID_CH_MODE_SEL, tmp & 0xFFFFFE00);
  83
  84         return 0;
  85 }
  86
  87 int cx25821_video_irq(struct cx25821_dev *dev, int chan_num, u32 status)
  88 {
  89         int handled = 0;
  90         u32 mask;
  91         const struct sram_channel *channel = dev->channels[chan_num].sram_channels;
  92
  93         mask = cx_read(channel->int_msk);
  94         if (0 == (status & mask))
  95                 return handled;
  96
  97         cx_write(channel->int_stat, status);
  98
  99         /* risc op code error */
 100         if (status & (1 << 16)) {
 101                 pr_warn("%s, %s: video risc op code error\n",
 102                         dev->name, channel->name);
 103                 cx_clear(channel->dma_ctl, 0x11);
 104                 cx25821_sram_channel_dump(dev, channel);
 105         }
 106
 107         /* risc1 y */
 108         if (status & FLD_VID_DST_RISC1) {
 109                 struct cx25821_dmaqueue *dmaq =
 110                         &dev->channels[channel->i].dma_vidq;
 111                 struct cx25821_buffer *buf;
 112
 113                 spin_lock(&dev->slock);
 114                 if (!list_empty(&dmaq->active)) {
 115                         buf = list_entry(dmaq->active.next,
 116                                          struct cx25821_buffer, queue);
 117
 118                         buf->vb.vb2_buf.timestamp = ktime_get_ns();
 119                         buf->vb.sequence = dmaq->count++;
 120                         list_del(&buf->queue);
 121                         vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
 122                 }
 123                 spin_unlock(&dev->slock);
 124                 handled++;
 125         }
 126         return handled;
 127 }
 128
 129 static int cx25821_queue_setup(struct vb2_queue *q,
 130                            unsigned int *num_buffers, unsigned int *num_planes,
 131                            unsigned int sizes[], struct device *alloc_devs[])
 132 {
 133         struct cx25821_channel *chan = q->drv_priv;
 134         unsigned size = (chan->fmt->depth * chan->width * chan->height) >> 3;
 135
 136         if (*num_planes)
 137                 return sizes[0] < size ? -EINVAL : 0;
 138
 139         *num_planes = 1;
 140         sizes[0] = size;
 141         return 0;
 142 }
 143
 144 static int cx25821_buffer_prepare(struct vb2_buffer *vb)
 145 {
 146         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 147         struct cx25821_channel *chan = vb->vb2_queue->drv_priv;
 148         struct cx25821_dev *dev = chan->dev;
 149         struct cx25821_buffer *buf =
 150                 container_of(vbuf, struct cx25821_buffer, vb);
 151         struct sg_table *sgt = vb2_dma_sg_plane_desc(vb, 0);
 152         u32 line0_offset;
 153         int bpl_local = LINE_SIZE_D1;
 154         int ret;
 155
 156         if (chan->pixel_formats == PIXEL_FRMT_411)
 157                 buf->bpl = (chan->fmt->depth * chan->width) >> 3;
 158         else
 159                 buf->bpl = (chan->fmt->depth >> 3) * chan->width;
 160
 161         if (vb2_plane_size(vb, 0) < chan->height * buf->bpl)
 162                 return -EINVAL;
 163         vb2_set_plane_payload(vb, 0, chan->height * buf->bpl);
 164         buf->vb.field = chan->field;
 165
 166         if (chan->pixel_formats == PIXEL_FRMT_411) {
 167                 bpl_local = buf->bpl;
 168         } else {
 169                 bpl_local = buf->bpl;   /* Default */
 170
 171                 if (chan->use_cif_resolution) {
 172                         if (dev->tvnorm & V4L2_STD_625_50)
 173                                 bpl_local = 352 << 1;
 174                         else
 175                                 bpl_local = chan->cif_width << 1;
 176                 }
 177         }
 178
 179         switch (chan->field) {
 180         case V4L2_FIELD_TOP:
 181                 ret = cx25821_risc_buffer(dev->pci, &buf->risc,
 182                                 sgt->sgl, 0, UNSET,
 183                                 buf->bpl, 0, chan->height);
 184                 break;
 185         case V4L2_FIELD_BOTTOM:
 186                 ret = cx25821_risc_buffer(dev->pci, &buf->risc,
 187                                 sgt->sgl, UNSET, 0,
 188                                 buf->bpl, 0, chan->height);
 189                 break;
 190         case V4L2_FIELD_INTERLACED:
 191                 /* All other formats are top field first */
 192                 line0_offset = 0;
 193                 dprintk(1, "top field first\n");
 194
 195                 ret = cx25821_risc_buffer(dev->pci, &buf->risc,
 196                                 sgt->sgl, line0_offset,
 197                                 bpl_local, bpl_local, bpl_local,
 198                                 chan->height >> 1);
 199                 break;
 200         case V4L2_FIELD_SEQ_TB:
 201                 ret = cx25821_risc_buffer(dev->pci, &buf->risc,
 202                                 sgt->sgl,
 203                                 0, buf->bpl * (chan->height >> 1),
 204                                 buf->bpl, 0, chan->height >> 1);
 205                 break;
 206         case V4L2_FIELD_SEQ_BT:
 207                 ret = cx25821_risc_buffer(dev->pci, &buf->risc,
 208                                 sgt->sgl,
 209                                 buf->bpl * (chan->height >> 1), 0,
 210                                 buf->bpl, 0, chan->height >> 1);
 211                 break;
 212         default:
 213                 WARN_ON(1);
 214                 ret = -EINVAL;
 215                 break;
 216         }
 217
 218         dprintk(2, "[%p/%d] buffer_prep - %dx%d %dbpp \"%s\" - dma=0x%08lx\n",
 219                 buf, buf->vb.vb2_buf.index, chan->width, chan->height,
 220                 chan->fmt->depth, chan->fmt->name,
 221                 (unsigned long)buf->risc.dma);
 222
 223         return ret;
 224 }
 225
 226 static void cx25821_buffer_finish(struct vb2_buffer *vb)
 227 {
 228         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 229         struct cx25821_buffer *buf =
 230                 container_of(vbuf, struct cx25821_buffer, vb);
 231         struct cx25821_channel *chan = vb->vb2_queue->drv_priv;
 232         struct cx25821_dev *dev = chan->dev;
 233
 234         cx25821_free_buffer(dev, buf);
 235 }
 236
 237 static void cx25821_buffer_queue(struct vb2_buffer *vb)
 238 {
 239         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 240         struct cx25821_buffer *buf =
 241                 container_of(vbuf, struct cx25821_buffer, vb);
 242         struct cx25821_channel *chan = vb->vb2_queue->drv_priv;
 243         struct cx25821_dev *dev = chan->dev;
 244         struct cx25821_buffer *prev;
 245         struct cx25821_dmaqueue *q = &dev->channels[chan->id].dma_vidq;
 246
 247         buf->risc.cpu[1] = cpu_to_le32(buf->risc.dma + 12);
 248         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_CNT_INC);
 249         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma + 12);
 250         buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */
 251
 252         if (list_empty(&q->active)) {
 253                 list_add_tail(&buf->queue, &q->active);
 254         } else {
 255                 buf->risc.cpu[0] |= cpu_to_le32(RISC_IRQ1);
 256                 prev = list_entry(q->active.prev, struct cx25821_buffer,
 257                                 queue);
 258                 list_add_tail(&buf->queue, &q->active);
 259                 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 260         }
 261 }
 262
 263 static int cx25821_start_streaming(struct vb2_queue *q, unsigned int count)
 264 {
 265         struct cx25821_channel *chan = q->drv_priv;
 266         struct cx25821_dev *dev = chan->dev;
 267         struct cx25821_dmaqueue *dmaq = &dev->channels[chan->id].dma_vidq;
 268         struct cx25821_buffer *buf = list_entry(dmaq->active.next,
 269                         struct cx25821_buffer, queue);
 270
 271         dmaq->count = 0;
 272         cx25821_start_video_dma(dev, dmaq, buf, chan->sram_channels);
 273         return 0;
 274 }
 275
 276 static void cx25821_stop_streaming(struct vb2_queue *q)
 277 {
 278         struct cx25821_channel *chan = q->drv_priv;
 279         struct cx25821_dev *dev = chan->dev;
 280         struct cx25821_dmaqueue *dmaq = &dev->channels[chan->id].dma_vidq;
 281         unsigned long flags;
 282
 283         cx_write(chan->sram_channels->dma_ctl, 0); /* FIFO and RISC disable */
 284         spin_lock_irqsave(&dev->slock, flags);
 285         while (!list_empty(&dmaq->active)) {
 286                 struct cx25821_buffer *buf = list_entry(dmaq->active.next,
 287                         struct cx25821_buffer, queue);
 288
 289                 list_del(&buf->queue);
 290                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 291         }
 292         spin_unlock_irqrestore(&dev->slock, flags);
 293 }
 294
 295 static const struct vb2_ops cx25821_video_qops = {
 296         .queue_setup    = cx25821_queue_setup,
 297         .buf_prepare  = cx25821_buffer_prepare,
 298         .buf_finish = cx25821_buffer_finish,
 299         .buf_queue    = cx25821_buffer_queue,
 300         .wait_prepare = vb2_ops_wait_prepare,
 301         .wait_finish = vb2_ops_wait_finish,
 302         .start_streaming = cx25821_start_streaming,
 303         .stop_streaming = cx25821_stop_streaming,
 304 };
 305
 306 /* VIDEO IOCTLS */
 307
 308 static int cx25821_vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
 309                             struct v4l2_fmtdesc *f)
 310 {
 311         if (unlikely(f->index >= ARRAY_SIZE(formats)))
 312                 return -EINVAL;
 313
 314         strscpy(f->description, formats[f->index].name, sizeof(f->description));
 315         f->pixelformat = formats[f->index].fourcc;
 316
 317         return 0;
 318 }
 319
 320 static int cx25821_vidioc_g_fmt_vid_cap(struct file *file, void *priv,
 321                                  struct v4l2_format *f)
 322 {
 323         struct cx25821_channel *chan = video_drvdata(file);
 324
 325         f->fmt.pix.width = chan->width;
 326         f->fmt.pix.height = chan->height;
 327         f->fmt.pix.field = chan->field;
 328         f->fmt.pix.pixelformat = chan->fmt->fourcc;
 329         f->fmt.pix.bytesperline = (chan->width * chan->fmt->depth) >> 3;
 330         f->fmt.pix.sizeimage = chan->height * f->fmt.pix.bytesperline;
 331         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 332
 333         return 0;
 334 }
 335
 336 static int cx25821_vidioc_try_fmt_vid_cap(struct file *file, void *priv,
 337                                    struct v4l2_format *f)
 338 {
 339         struct cx25821_channel *chan = video_drvdata(file);
 340         struct cx25821_dev *dev = chan->dev;
 341         const struct cx25821_fmt *fmt;
 342         enum v4l2_field field = f->fmt.pix.field;
 343         unsigned int maxh;
 344         unsigned w;
 345
 346         fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
 347         if (NULL == fmt)
 348                 return -EINVAL;
 349         maxh = (dev->tvnorm & V4L2_STD_625_50) ? 576 : 480;
 350
 351         w = f->fmt.pix.width;
 352         if (field != V4L2_FIELD_BOTTOM)
 353                 field = V4L2_FIELD_TOP;
 354         if (w < 352) {
 355                 w = 176;
 356                 f->fmt.pix.height = maxh / 4;
 357         } else if (w < 720) {
 358                 w = 352;
 359                 f->fmt.pix.height = maxh / 2;
 360         } else {
 361                 w = 720;
 362                 f->fmt.pix.height = maxh;
 363                 field = V4L2_FIELD_INTERLACED;
 364         }
 365         f->fmt.pix.field = field;
 366         f->fmt.pix.width = w;
 367         f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
 368         f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
 369         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 370
 371         return 0;
 372 }
 373
 374 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 375                                 struct v4l2_format *f)
 376 {
 377         struct cx25821_channel *chan = video_drvdata(file);
 378         struct cx25821_dev *dev = chan->dev;
 379         int pix_format = PIXEL_FRMT_422;
 380         int err;
 381
 382         err = cx25821_vidioc_try_fmt_vid_cap(file, priv, f);
 383
 384         if (0 != err)
 385                 return err;
 386
 387         chan->fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
 388         chan->field = f->fmt.pix.field;
 389         chan->width = f->fmt.pix.width;
 390         chan->height = f->fmt.pix.height;
 391
 392         if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_Y41P)
 393                 pix_format = PIXEL_FRMT_411;
 394         else
 395                 pix_format = PIXEL_FRMT_422;
 396
 397         cx25821_set_pixel_format(dev, SRAM_CH00, pix_format);
 398
 399         /* check if cif resolution */
 400         if (chan->width == 320 || chan->width == 352)
 401                 chan->use_cif_resolution = 1;
 402         else
 403                 chan->use_cif_resolution = 0;
 404
 405         chan->cif_width = chan->width;
 406         medusa_set_resolution(dev, chan->width, SRAM_CH00);
 407         return 0;
 408 }
 409
 410 static int vidioc_log_status(struct file *file, void *priv)
 411 {
 412         struct cx25821_channel *chan = video_drvdata(file);
 413         struct cx25821_dev *dev = chan->dev;
 414         const struct sram_channel *sram_ch = chan->sram_channels;
 415         u32 tmp = 0;
 416
 417         tmp = cx_read(sram_ch->dma_ctl);
 418         pr_info("Video input 0 is %s\n",
 419                 (tmp & 0x11) ? "streaming" : "stopped");
 420         return 0;
 421 }
 422
 423
 424 static int cx25821_vidioc_querycap(struct file *file, void *priv,
 425                             struct v4l2_capability *cap)
 426 {
 427         struct cx25821_channel *chan = video_drvdata(file);
 428         struct cx25821_dev *dev = chan->dev;
 429
 430         strscpy(cap->driver, "cx25821", sizeof(cap->driver));
 431         strscpy(cap->card, cx25821_boards[dev->board].name, sizeof(cap->card));
 432         sprintf(cap->bus_info, "PCIe:%s", pci_name(dev->pci));
 433         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT |
 434                             V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
 435                             V4L2_CAP_DEVICE_CAPS;
 436         return 0;
 437 }
 438
 439 static int cx25821_vidioc_g_std(struct file *file, void *priv, v4l2_std_id *tvnorms)
 440 {
 441         struct cx25821_channel *chan = video_drvdata(file);
 442
 443         *tvnorms = chan->dev->tvnorm;
 444         return 0;
 445 }
 446
 447 static int cx25821_vidioc_s_std(struct file *file, void *priv,
 448                                 v4l2_std_id tvnorms)
 449 {
 450         struct cx25821_channel *chan = video_drvdata(file);
 451         struct cx25821_dev *dev = chan->dev;
 452
 453         if (dev->tvnorm == tvnorms)
 454                 return 0;
 455
 456         dev->tvnorm = tvnorms;
 457         chan->width = 720;
 458         chan->height = (dev->tvnorm & V4L2_STD_625_50) ? 576 : 480;
 459
 460         medusa_set_videostandard(dev);
 461
 462         return 0;
 463 }
 464
 465 static int cx25821_vidioc_enum_input(struct file *file, void *priv,
 466                               struct v4l2_input *i)
 467 {
 468         if (i->index)
 469                 return -EINVAL;
 470
 471         i->type = V4L2_INPUT_TYPE_CAMERA;
 472         i->std = CX25821_NORMS;
 473         strscpy(i->name, "Composite", sizeof(i->name));
 474         return 0;
 475 }
 476
 477 static int cx25821_vidioc_g_input(struct file *file, void *priv, unsigned int *i)
 478 {
 479         *i = 0;
 480         return 0;
 481 }
 482
 483 static int cx25821_vidioc_s_input(struct file *file, void *priv, unsigned int i)
 484 {
 485         return i ? -EINVAL : 0;
 486 }
 487
 488 static int cx25821_s_ctrl(struct v4l2_ctrl *ctrl)
 489 {
 490         struct cx25821_channel *chan =
 491                 container_of(ctrl->handler, struct cx25821_channel, hdl);
 492         struct cx25821_dev *dev = chan->dev;
 493
 494         switch (ctrl->id) {
 495         case V4L2_CID_BRIGHTNESS:
 496                 medusa_set_brightness(dev, ctrl->val, chan->id);
 497                 break;
 498         case V4L2_CID_HUE:
 499                 medusa_set_hue(dev, ctrl->val, chan->id);
 500                 break;
 501         case V4L2_CID_CONTRAST:
 502                 medusa_set_contrast(dev, ctrl->val, chan->id);
 503                 break;
 504         case V4L2_CID_SATURATION:
 505                 medusa_set_saturation(dev, ctrl->val, chan->id);
 506                 break;
 507         default:
 508                 return -EINVAL;
 509         }
 510         return 0;
 511 }
 512
 513 static int cx25821_vidioc_enum_output(struct file *file, void *priv,
 514                               struct v4l2_output *o)
 515 {
 516         if (o->index)
 517                 return -EINVAL;
 518
 519         o->type = V4L2_INPUT_TYPE_CAMERA;
 520         o->std = CX25821_NORMS;
 521         strscpy(o->name, "Composite", sizeof(o->name));
 522         return 0;
 523 }
 524
 525 static int cx25821_vidioc_g_output(struct file *file, void *priv, unsigned int *o)
 526 {
 527         *o = 0;
 528         return 0;
 529 }
 530
 531 static int cx25821_vidioc_s_output(struct file *file, void *priv, unsigned int o)
 532 {
 533         return o ? -EINVAL : 0;
 534 }
 535
 536 static int cx25821_vidioc_try_fmt_vid_out(struct file *file, void *priv,
 537                                    struct v4l2_format *f)
 538 {
 539         struct cx25821_channel *chan = video_drvdata(file);
 540         struct cx25821_dev *dev = chan->dev;
 541         const struct cx25821_fmt *fmt;
 542
 543         fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
 544         if (NULL == fmt)
 545                 return -EINVAL;
 546         f->fmt.pix.width = 720;
 547         f->fmt.pix.height = (dev->tvnorm & V4L2_STD_625_50) ? 576 : 480;
 548         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
 549         f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
 550         f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
 551         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 552         return 0;
 553 }
 554
 555 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
 556                                 struct v4l2_format *f)
 557 {
 558         struct cx25821_channel *chan = video_drvdata(file);
 559         int err;
 560
 561         err = cx25821_vidioc_try_fmt_vid_out(file, priv, f);
 562
 563         if (0 != err)
 564                 return err;
 565
 566         chan->fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
 567         chan->field = f->fmt.pix.field;
 568         chan->width = f->fmt.pix.width;
 569         chan->height = f->fmt.pix.height;
 570         if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_Y41P)
 571                 chan->pixel_formats = PIXEL_FRMT_411;
 572         else
 573                 chan->pixel_formats = PIXEL_FRMT_422;
 574         return 0;
 575 }
 576
 577 static const struct v4l2_ctrl_ops cx25821_ctrl_ops = {
 578         .s_ctrl = cx25821_s_ctrl,
 579 };
 580
 581 static const struct v4l2_file_operations video_fops = {
 582         .owner = THIS_MODULE,
 583         .open = v4l2_fh_open,
 584         .release        = vb2_fop_release,
 585         .read           = vb2_fop_read,
 586         .poll           = vb2_fop_poll,
 587         .unlocked_ioctl = video_ioctl2,
 588         .mmap           = vb2_fop_mmap,
 589 };
 590
 591 static const struct v4l2_ioctl_ops video_ioctl_ops = {
 592         .vidioc_querycap = cx25821_vidioc_querycap,
 593         .vidioc_enum_fmt_vid_cap = cx25821_vidioc_enum_fmt_vid_cap,
 594         .vidioc_g_fmt_vid_cap = cx25821_vidioc_g_fmt_vid_cap,
 595         .vidioc_try_fmt_vid_cap = cx25821_vidioc_try_fmt_vid_cap,
 596         .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
 597         .vidioc_reqbufs       = vb2_ioctl_reqbufs,
 598         .vidioc_prepare_buf   = vb2_ioctl_prepare_buf,
 599         .vidioc_create_bufs   = vb2_ioctl_create_bufs,
 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         .vidioc_g_std = cx25821_vidioc_g_std,
 606         .vidioc_s_std = cx25821_vidioc_s_std,
 607         .vidioc_enum_input = cx25821_vidioc_enum_input,
 608         .vidioc_g_input = cx25821_vidioc_g_input,
 609         .vidioc_s_input = cx25821_vidioc_s_input,
 610         .vidioc_log_status = vidioc_log_status,
 611         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
 612         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
 613 };
 614
 615 static const struct video_device cx25821_video_device = {
 616         .name = "cx25821-video",
 617         .fops = &video_fops,
 618         .release = video_device_release_empty,
 619         .minor = -1,
 620         .ioctl_ops = &video_ioctl_ops,
 621         .tvnorms = CX25821_NORMS,
 622         .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
 623                        V4L2_CAP_STREAMING,
 624 };
 625
 626 static const struct v4l2_file_operations video_out_fops = {
 627         .owner = THIS_MODULE,
 628         .open = v4l2_fh_open,
 629         .release        = vb2_fop_release,
 630         .write          = vb2_fop_write,
 631         .poll           = vb2_fop_poll,
 632         .unlocked_ioctl = video_ioctl2,
 633         .mmap           = vb2_fop_mmap,
 634 };
 635
 636 static const struct v4l2_ioctl_ops video_out_ioctl_ops = {
 637         .vidioc_querycap = cx25821_vidioc_querycap,
 638         .vidioc_enum_fmt_vid_out = cx25821_vidioc_enum_fmt_vid_cap,
 639         .vidioc_g_fmt_vid_out = cx25821_vidioc_g_fmt_vid_cap,
 640         .vidioc_try_fmt_vid_out = cx25821_vidioc_try_fmt_vid_out,
 641         .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
 642         .vidioc_g_std = cx25821_vidioc_g_std,
 643         .vidioc_s_std = cx25821_vidioc_s_std,
 644         .vidioc_enum_output = cx25821_vidioc_enum_output,
 645         .vidioc_g_output = cx25821_vidioc_g_output,
 646         .vidioc_s_output = cx25821_vidioc_s_output,
 647         .vidioc_log_status = vidioc_log_status,
 648 };
 649
 650 static const struct video_device cx25821_video_out_device = {
 651         .name = "cx25821-video",
 652         .fops = &video_out_fops,
 653         .release = video_device_release_empty,
 654         .minor = -1,
 655         .ioctl_ops = &video_out_ioctl_ops,
 656         .tvnorms = CX25821_NORMS,
 657         .device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_READWRITE,
 658 };
 659
 660 void cx25821_video_unregister(struct cx25821_dev *dev, int chan_num)
 661 {
 662         cx_clear(PCI_INT_MSK, 1);
 663
 664         if (video_is_registered(&dev->channels[chan_num].vdev)) {
 665                 video_unregister_device(&dev->channels[chan_num].vdev);
 666                 v4l2_ctrl_handler_free(&dev->channels[chan_num].hdl);
 667         }
 668 }
 669
 670 int cx25821_video_register(struct cx25821_dev *dev)
 671 {
 672         int err;
 673         int i;
 674
 675         /* initial device configuration */
 676         dev->tvnorm = V4L2_STD_NTSC_M;
 677
 678         spin_lock_init(&dev->slock);
 679
 680         for (i = 0; i < MAX_VID_CAP_CHANNEL_NUM - 1; ++i) {
 681                 struct cx25821_channel *chan = &dev->channels[i];
 682                 struct video_device *vdev = &chan->vdev;
 683                 struct v4l2_ctrl_handler *hdl = &chan->hdl;
 684                 struct vb2_queue *q;
 685                 bool is_output = i > SRAM_CH08;
 686
 687                 if (i == SRAM_CH08) /* audio channel */
 688                         continue;
 689
 690                 if (!is_output) {
 691                         v4l2_ctrl_handler_init(hdl, 4);
 692                         v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
 693                                         V4L2_CID_BRIGHTNESS, 0, 10000, 1, 6200);
 694                         v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
 695                                         V4L2_CID_CONTRAST, 0, 10000, 1, 5000);
 696                         v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
 697                                         V4L2_CID_SATURATION, 0, 10000, 1, 5000);
 698                         v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
 699                                         V4L2_CID_HUE, 0, 10000, 1, 5000);
 700                         if (hdl->error) {
 701                                 err = hdl->error;
 702                                 goto fail_unreg;
 703                         }
 704                         err = v4l2_ctrl_handler_setup(hdl);
 705                         if (err)
 706                                 goto fail_unreg;
 707                 } else {
 708                         chan->out = &dev->vid_out_data[i - SRAM_CH09];
 709                         chan->out->chan = chan;
 710                 }
 711
 712                 chan->sram_channels = &cx25821_sram_channels[i];
 713                 chan->width = 720;
 714                 chan->field = V4L2_FIELD_INTERLACED;
 715                 if (dev->tvnorm & V4L2_STD_625_50)
 716                         chan->height = 576;
 717                 else
 718                         chan->height = 480;
 719
 720                 if (chan->pixel_formats == PIXEL_FRMT_411)
 721                         chan->fmt = cx25821_format_by_fourcc(V4L2_PIX_FMT_Y41P);
 722                 else
 723                         chan->fmt = cx25821_format_by_fourcc(V4L2_PIX_FMT_YUYV);
 724
 725                 cx_write(chan->sram_channels->int_stat, 0xffffffff);
 726
 727                 INIT_LIST_HEAD(&chan->dma_vidq.active);
 728
 729                 q = &chan->vidq;
 730
 731                 q->type = is_output ? V4L2_BUF_TYPE_VIDEO_OUTPUT :
 732                                       V4L2_BUF_TYPE_VIDEO_CAPTURE;
 733                 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
 734                 q->io_modes |= is_output ? VB2_WRITE : VB2_READ;
 735                 q->gfp_flags = GFP_DMA32;
 736                 q->min_buffers_needed = 2;
 737                 q->drv_priv = chan;
 738                 q->buf_struct_size = sizeof(struct cx25821_buffer);
 739                 q->ops = &cx25821_video_qops;
 740                 q->mem_ops = &vb2_dma_sg_memops;
 741                 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 742                 q->lock = &dev->lock;
 743                 q->dev = &dev->pci->dev;
 744
 745                 if (!is_output) {
 746                         err = vb2_queue_init(q);
 747                         if (err < 0)
 748                                 goto fail_unreg;
 749                 }
 750
 751                 /* register v4l devices */
 752                 *vdev = is_output ? cx25821_video_out_device : cx25821_video_device;
 753                 vdev->v4l2_dev = &dev->v4l2_dev;
 754                 if (!is_output)
 755                         vdev->ctrl_handler = hdl;
 756                 else
 757                         vdev->vfl_dir = VFL_DIR_TX;
 758                 vdev->lock = &dev->lock;
 759                 vdev->queue = q;
 760                 snprintf(vdev->name, sizeof(vdev->name), "%s #%d", dev->name, i);
 761                 video_set_drvdata(vdev, chan);
 762
 763                 err = video_register_device(vdev, VFL_TYPE_GRABBER,
 764                                             video_nr[dev->nr]);
 765
 766                 if (err < 0)
 767                         goto fail_unreg;
 768         }
 769
 770         /* set PCI interrupt */
 771         cx_set(PCI_INT_MSK, 0xff);
 772
 773         return 0;
 774
 775 fail_unreg:
 776         while (i >= 0)
 777                 cx25821_video_unregister(dev, i--);
 778         return err;
 779 }