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                 .fourcc = V4L2_PIX_FMT_Y41P,
  39                 .depth = 12,
  40                 .flags = FORMAT_FLAGS_PACKED,
  41         }, {
  42                 .fourcc = V4L2_PIX_FMT_YUYV,
  43                 .depth = 16,
  44                 .flags = FORMAT_FLAGS_PACKED,
  45         },
  46 };
  47
  48 static const struct cx25821_fmt *cx25821_format_by_fourcc(unsigned int fourcc)
  49 {
  50         unsigned int i;
  51
  52         for (i = 0; i < ARRAY_SIZE(formats); i++)
  53                 if (formats[i].fourcc == fourcc)
  54                         return formats + i;
  55         return NULL;
  56 }
  57
  58 int cx25821_start_video_dma(struct cx25821_dev *dev,
  59                             struct cx25821_dmaqueue *q,
  60                             struct cx25821_buffer *buf,
  61                             const struct sram_channel *channel)
  62 {
  63         int tmp = 0;
  64
  65         /* setup fifo + format */
  66         cx25821_sram_channel_setup(dev, channel, buf->bpl, buf->risc.dma);
  67
  68         /* reset counter */
  69         cx_write(channel->gpcnt_ctl, 3);
  70
  71         /* enable irq */
  72         cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << channel->i));
  73         cx_set(channel->int_msk, 0x11);
  74
  75         /* start dma */
  76         cx_write(channel->dma_ctl, 0x11);       /* FIFO and RISC enable */
  77
  78         /* make sure upstream setting if any is reversed */
  79         tmp = cx_read(VID_CH_MODE_SEL);
  80         cx_write(VID_CH_MODE_SEL, tmp & 0xFFFFFE00);
  81
  82         return 0;
  83 }
  84
  85 int cx25821_video_irq(struct cx25821_dev *dev, int chan_num, u32 status)
  86 {
  87         int handled = 0;
  88         u32 mask;
  89         const struct sram_channel *channel = dev->channels[chan_num].sram_channels;
  90
  91         mask = cx_read(channel->int_msk);
  92         if (0 == (status & mask))
  93                 return handled;
  94
  95         cx_write(channel->int_stat, status);
  96
  97         /* risc op code error */
  98         if (status & (1 << 16)) {
  99                 pr_warn("%s, %s: video risc op code error\n",
 100                         dev->name, channel->name);
 101                 cx_clear(channel->dma_ctl, 0x11);
 102                 cx25821_sram_channel_dump(dev, channel);
 103         }
 104
 105         /* risc1 y */
 106         if (status & FLD_VID_DST_RISC1) {
 107                 struct cx25821_dmaqueue *dmaq =
 108                         &dev->channels[channel->i].dma_vidq;
 109                 struct cx25821_buffer *buf;
 110
 111                 spin_lock(&dev->slock);
 112                 if (!list_empty(&dmaq->active)) {
 113                         buf = list_entry(dmaq->active.next,
 114                                          struct cx25821_buffer, queue);
 115
 116                         buf->vb.vb2_buf.timestamp = ktime_get_ns();
 117                         buf->vb.sequence = dmaq->count++;
 118                         list_del(&buf->queue);
 119                         vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
 120                 }
 121                 spin_unlock(&dev->slock);
 122                 handled++;
 123         }
 124         return handled;
 125 }
 126
 127 static int cx25821_queue_setup(struct vb2_queue *q,
 128                            unsigned int *num_buffers, unsigned int *num_planes,
 129                            unsigned int sizes[], struct device *alloc_devs[])
 130 {
 131         struct cx25821_channel *chan = q->drv_priv;
 132         unsigned size = (chan->fmt->depth * chan->width * chan->height) >> 3;
 133
 134         if (*num_planes)
 135                 return sizes[0] < size ? -EINVAL : 0;
 136
 137         *num_planes = 1;
 138         sizes[0] = size;
 139         return 0;
 140 }
 141
 142 static int cx25821_buffer_prepare(struct vb2_buffer *vb)
 143 {
 144         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 145         struct cx25821_channel *chan = vb->vb2_queue->drv_priv;
 146         struct cx25821_dev *dev = chan->dev;
 147         struct cx25821_buffer *buf =
 148                 container_of(vbuf, struct cx25821_buffer, vb);
 149         struct sg_table *sgt = vb2_dma_sg_plane_desc(vb, 0);
 150         u32 line0_offset;
 151         int bpl_local = LINE_SIZE_D1;
 152         int ret;
 153
 154         if (chan->pixel_formats == PIXEL_FRMT_411)
 155                 buf->bpl = (chan->fmt->depth * chan->width) >> 3;
 156         else
 157                 buf->bpl = (chan->fmt->depth >> 3) * chan->width;
 158
 159         if (vb2_plane_size(vb, 0) < chan->height * buf->bpl)
 160                 return -EINVAL;
 161         vb2_set_plane_payload(vb, 0, chan->height * buf->bpl);
 162         buf->vb.field = chan->field;
 163
 164         if (chan->pixel_formats == PIXEL_FRMT_411) {
 165                 bpl_local = buf->bpl;
 166         } else {
 167                 bpl_local = buf->bpl;   /* Default */
 168
 169                 if (chan->use_cif_resolution) {
 170                         if (dev->tvnorm & V4L2_STD_625_50)
 171                                 bpl_local = 352 << 1;
 172                         else
 173                                 bpl_local = chan->cif_width << 1;
 174                 }
 175         }
 176
 177         switch (chan->field) {
 178         case V4L2_FIELD_TOP:
 179                 ret = cx25821_risc_buffer(dev->pci, &buf->risc,
 180                                 sgt->sgl, 0, UNSET,
 181                                 buf->bpl, 0, chan->height);
 182                 break;
 183         case V4L2_FIELD_BOTTOM:
 184                 ret = cx25821_risc_buffer(dev->pci, &buf->risc,
 185                                 sgt->sgl, UNSET, 0,
 186                                 buf->bpl, 0, chan->height);
 187                 break;
 188         case V4L2_FIELD_INTERLACED:
 189                 /* All other formats are top field first */
 190                 line0_offset = 0;
 191                 dprintk(1, "top field first\n");
 192
 193                 ret = cx25821_risc_buffer(dev->pci, &buf->risc,
 194                                 sgt->sgl, line0_offset,
 195                                 bpl_local, bpl_local, bpl_local,
 196                                 chan->height >> 1);
 197                 break;
 198         case V4L2_FIELD_SEQ_TB:
 199                 ret = cx25821_risc_buffer(dev->pci, &buf->risc,
 200                                 sgt->sgl,
 201                                 0, buf->bpl * (chan->height >> 1),
 202                                 buf->bpl, 0, chan->height >> 1);
 203                 break;
 204         case V4L2_FIELD_SEQ_BT:
 205                 ret = cx25821_risc_buffer(dev->pci, &buf->risc,
 206                                 sgt->sgl,
 207                                 buf->bpl * (chan->height >> 1), 0,
 208                                 buf->bpl, 0, chan->height >> 1);
 209                 break;
 210         default:
 211                 WARN_ON(1);
 212                 ret = -EINVAL;
 213                 break;
 214         }
 215
 216         dprintk(2, "[%p/%d] buffer_prep - %dx%d %dbpp 0x%08x - dma=0x%08lx\n",
 217                 buf, buf->vb.vb2_buf.index, chan->width, chan->height,
 218                 chan->fmt->depth, chan->fmt->fourcc,
 219                 (unsigned long)buf->risc.dma);
 220
 221         return ret;
 222 }
 223
 224 static void cx25821_buffer_finish(struct vb2_buffer *vb)
 225 {
 226         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 227         struct cx25821_buffer *buf =
 228                 container_of(vbuf, struct cx25821_buffer, vb);
 229         struct cx25821_channel *chan = vb->vb2_queue->drv_priv;
 230         struct cx25821_dev *dev = chan->dev;
 231
 232         cx25821_free_buffer(dev, buf);
 233 }
 234
 235 static void cx25821_buffer_queue(struct vb2_buffer *vb)
 236 {
 237         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 238         struct cx25821_buffer *buf =
 239                 container_of(vbuf, struct cx25821_buffer, vb);
 240         struct cx25821_channel *chan = vb->vb2_queue->drv_priv;
 241         struct cx25821_dev *dev = chan->dev;
 242         struct cx25821_buffer *prev;
 243         struct cx25821_dmaqueue *q = &dev->channels[chan->id].dma_vidq;
 244
 245         buf->risc.cpu[1] = cpu_to_le32(buf->risc.dma + 12);
 246         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_CNT_INC);
 247         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma + 12);
 248         buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */
 249
 250         if (list_empty(&q->active)) {
 251                 list_add_tail(&buf->queue, &q->active);
 252         } else {
 253                 buf->risc.cpu[0] |= cpu_to_le32(RISC_IRQ1);
 254                 prev = list_entry(q->active.prev, struct cx25821_buffer,
 255                                 queue);
 256                 list_add_tail(&buf->queue, &q->active);
 257                 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 258         }
 259 }
 260
 261 static int cx25821_start_streaming(struct vb2_queue *q, unsigned int count)
 262 {
 263         struct cx25821_channel *chan = q->drv_priv;
 264         struct cx25821_dev *dev = chan->dev;
 265         struct cx25821_dmaqueue *dmaq = &dev->channels[chan->id].dma_vidq;
 266         struct cx25821_buffer *buf = list_entry(dmaq->active.next,
 267                         struct cx25821_buffer, queue);
 268
 269         dmaq->count = 0;
 270         cx25821_start_video_dma(dev, dmaq, buf, chan->sram_channels);
 271         return 0;
 272 }
 273
 274 static void cx25821_stop_streaming(struct vb2_queue *q)
 275 {
 276         struct cx25821_channel *chan = q->drv_priv;
 277         struct cx25821_dev *dev = chan->dev;
 278         struct cx25821_dmaqueue *dmaq = &dev->channels[chan->id].dma_vidq;
 279         unsigned long flags;
 280
 281         cx_write(chan->sram_channels->dma_ctl, 0); /* FIFO and RISC disable */
 282         spin_lock_irqsave(&dev->slock, flags);
 283         while (!list_empty(&dmaq->active)) {
 284                 struct cx25821_buffer *buf = list_entry(dmaq->active.next,
 285                         struct cx25821_buffer, queue);
 286
 287                 list_del(&buf->queue);
 288                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 289         }
 290         spin_unlock_irqrestore(&dev->slock, flags);
 291 }
 292
 293 static const struct vb2_ops cx25821_video_qops = {
 294         .queue_setup    = cx25821_queue_setup,
 295         .buf_prepare  = cx25821_buffer_prepare,
 296         .buf_finish = cx25821_buffer_finish,
 297         .buf_queue    = cx25821_buffer_queue,
 298         .wait_prepare = vb2_ops_wait_prepare,
 299         .wait_finish = vb2_ops_wait_finish,
 300         .start_streaming = cx25821_start_streaming,
 301         .stop_streaming = cx25821_stop_streaming,
 302 };
 303
 304 /* VIDEO IOCTLS */
 305
 306 static int cx25821_vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
 307                             struct v4l2_fmtdesc *f)
 308 {
 309         if (unlikely(f->index >= ARRAY_SIZE(formats)))
 310                 return -EINVAL;
 311
 312         f->pixelformat = formats[f->index].fourcc;
 313
 314         return 0;
 315 }
 316
 317 static int cx25821_vidioc_g_fmt_vid_cap(struct file *file, void *priv,
 318                                  struct v4l2_format *f)
 319 {
 320         struct cx25821_channel *chan = video_drvdata(file);
 321
 322         f->fmt.pix.width = chan->width;
 323         f->fmt.pix.height = chan->height;
 324         f->fmt.pix.field = chan->field;
 325         f->fmt.pix.pixelformat = chan->fmt->fourcc;
 326         f->fmt.pix.bytesperline = (chan->width * chan->fmt->depth) >> 3;
 327         f->fmt.pix.sizeimage = chan->height * f->fmt.pix.bytesperline;
 328         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 329
 330         return 0;
 331 }
 332
 333 static int cx25821_vidioc_try_fmt_vid_cap(struct file *file, void *priv,
 334                                    struct v4l2_format *f)
 335 {
 336         struct cx25821_channel *chan = video_drvdata(file);
 337         struct cx25821_dev *dev = chan->dev;
 338         const struct cx25821_fmt *fmt;
 339         enum v4l2_field field = f->fmt.pix.field;
 340         unsigned int maxh;
 341         unsigned w;
 342
 343         fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
 344         if (NULL == fmt)
 345                 return -EINVAL;
 346         maxh = (dev->tvnorm & V4L2_STD_625_50) ? 576 : 480;
 347
 348         w = f->fmt.pix.width;
 349         if (field != V4L2_FIELD_BOTTOM)
 350                 field = V4L2_FIELD_TOP;
 351         if (w < 352) {
 352                 w = 176;
 353                 f->fmt.pix.height = maxh / 4;
 354         } else if (w < 720) {
 355                 w = 352;
 356                 f->fmt.pix.height = maxh / 2;
 357         } else {
 358                 w = 720;
 359                 f->fmt.pix.height = maxh;
 360                 field = V4L2_FIELD_INTERLACED;
 361         }
 362         f->fmt.pix.field = field;
 363         f->fmt.pix.width = w;
 364         f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
 365         f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
 366         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 367
 368         return 0;
 369 }
 370
 371 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 372                                 struct v4l2_format *f)
 373 {
 374         struct cx25821_channel *chan = video_drvdata(file);
 375         struct cx25821_dev *dev = chan->dev;
 376         int pix_format = PIXEL_FRMT_422;
 377         int err;
 378
 379         err = cx25821_vidioc_try_fmt_vid_cap(file, priv, f);
 380
 381         if (0 != err)
 382                 return err;
 383
 384         chan->fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
 385         chan->field = f->fmt.pix.field;
 386         chan->width = f->fmt.pix.width;
 387         chan->height = f->fmt.pix.height;
 388
 389         if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_Y41P)
 390                 pix_format = PIXEL_FRMT_411;
 391         else
 392                 pix_format = PIXEL_FRMT_422;
 393
 394         cx25821_set_pixel_format(dev, SRAM_CH00, pix_format);
 395
 396         /* check if cif resolution */
 397         if (chan->width == 320 || chan->width == 352)
 398                 chan->use_cif_resolution = 1;
 399         else
 400                 chan->use_cif_resolution = 0;
 401
 402         chan->cif_width = chan->width;
 403         medusa_set_resolution(dev, chan->width, SRAM_CH00);
 404         return 0;
 405 }
 406
 407 static int vidioc_log_status(struct file *file, void *priv)
 408 {
 409         struct cx25821_channel *chan = video_drvdata(file);
 410         struct cx25821_dev *dev = chan->dev;
 411         const struct sram_channel *sram_ch = chan->sram_channels;
 412         u32 tmp = 0;
 413
 414         tmp = cx_read(sram_ch->dma_ctl);
 415         pr_info("Video input 0 is %s\n",
 416                 (tmp & 0x11) ? "streaming" : "stopped");
 417         return 0;
 418 }
 419
 420
 421 static int cx25821_vidioc_querycap(struct file *file, void *priv,
 422                             struct v4l2_capability *cap)
 423 {
 424         struct cx25821_channel *chan = video_drvdata(file);
 425         struct cx25821_dev *dev = chan->dev;
 426
 427         strscpy(cap->driver, "cx25821", sizeof(cap->driver));
 428         strscpy(cap->card, cx25821_boards[dev->board].name, sizeof(cap->card));
 429         sprintf(cap->bus_info, "PCIe:%s", pci_name(dev->pci));
 430         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT |
 431                             V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
 432                             V4L2_CAP_DEVICE_CAPS;
 433         return 0;
 434 }
 435
 436 static int cx25821_vidioc_g_std(struct file *file, void *priv, v4l2_std_id *tvnorms)
 437 {
 438         struct cx25821_channel *chan = video_drvdata(file);
 439
 440         *tvnorms = chan->dev->tvnorm;
 441         return 0;
 442 }
 443
 444 static int cx25821_vidioc_s_std(struct file *file, void *priv,
 445                                 v4l2_std_id tvnorms)
 446 {
 447         struct cx25821_channel *chan = video_drvdata(file);
 448         struct cx25821_dev *dev = chan->dev;
 449
 450         if (dev->tvnorm == tvnorms)
 451                 return 0;
 452
 453         dev->tvnorm = tvnorms;
 454         chan->width = 720;
 455         chan->height = (dev->tvnorm & V4L2_STD_625_50) ? 576 : 480;
 456
 457         medusa_set_videostandard(dev);
 458
 459         return 0;
 460 }
 461
 462 static int cx25821_vidioc_enum_input(struct file *file, void *priv,
 463                               struct v4l2_input *i)
 464 {
 465         if (i->index)
 466                 return -EINVAL;
 467
 468         i->type = V4L2_INPUT_TYPE_CAMERA;
 469         i->std = CX25821_NORMS;
 470         strscpy(i->name, "Composite", sizeof(i->name));
 471         return 0;
 472 }
 473
 474 static int cx25821_vidioc_g_input(struct file *file, void *priv, unsigned int *i)
 475 {
 476         *i = 0;
 477         return 0;
 478 }
 479
 480 static int cx25821_vidioc_s_input(struct file *file, void *priv, unsigned int i)
 481 {
 482         return i ? -EINVAL : 0;
 483 }
 484
 485 static int cx25821_s_ctrl(struct v4l2_ctrl *ctrl)
 486 {
 487         struct cx25821_channel *chan =
 488                 container_of(ctrl->handler, struct cx25821_channel, hdl);
 489         struct cx25821_dev *dev = chan->dev;
 490
 491         switch (ctrl->id) {
 492         case V4L2_CID_BRIGHTNESS:
 493                 medusa_set_brightness(dev, ctrl->val, chan->id);
 494                 break;
 495         case V4L2_CID_HUE:
 496                 medusa_set_hue(dev, ctrl->val, chan->id);
 497                 break;
 498         case V4L2_CID_CONTRAST:
 499                 medusa_set_contrast(dev, ctrl->val, chan->id);
 500                 break;
 501         case V4L2_CID_SATURATION:
 502                 medusa_set_saturation(dev, ctrl->val, chan->id);
 503                 break;
 504         default:
 505                 return -EINVAL;
 506         }
 507         return 0;
 508 }
 509
 510 static int cx25821_vidioc_enum_output(struct file *file, void *priv,
 511                               struct v4l2_output *o)
 512 {
 513         if (o->index)
 514                 return -EINVAL;
 515
 516         o->type = V4L2_INPUT_TYPE_CAMERA;
 517         o->std = CX25821_NORMS;
 518         strscpy(o->name, "Composite", sizeof(o->name));
 519         return 0;
 520 }
 521
 522 static int cx25821_vidioc_g_output(struct file *file, void *priv, unsigned int *o)
 523 {
 524         *o = 0;
 525         return 0;
 526 }
 527
 528 static int cx25821_vidioc_s_output(struct file *file, void *priv, unsigned int o)
 529 {
 530         return o ? -EINVAL : 0;
 531 }
 532
 533 static int cx25821_vidioc_try_fmt_vid_out(struct file *file, void *priv,
 534                                    struct v4l2_format *f)
 535 {
 536         struct cx25821_channel *chan = video_drvdata(file);
 537         struct cx25821_dev *dev = chan->dev;
 538         const struct cx25821_fmt *fmt;
 539
 540         fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
 541         if (NULL == fmt)
 542                 return -EINVAL;
 543         f->fmt.pix.width = 720;
 544         f->fmt.pix.height = (dev->tvnorm & V4L2_STD_625_50) ? 576 : 480;
 545         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
 546         f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
 547         f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
 548         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 549         return 0;
 550 }
 551
 552 static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
 553                                 struct v4l2_format *f)
 554 {
 555         struct cx25821_channel *chan = video_drvdata(file);
 556         int err;
 557
 558         err = cx25821_vidioc_try_fmt_vid_out(file, priv, f);
 559
 560         if (0 != err)
 561                 return err;
 562
 563         chan->fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
 564         chan->field = f->fmt.pix.field;
 565         chan->width = f->fmt.pix.width;
 566         chan->height = f->fmt.pix.height;
 567         if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_Y41P)
 568                 chan->pixel_formats = PIXEL_FRMT_411;
 569         else
 570                 chan->pixel_formats = PIXEL_FRMT_422;
 571         return 0;
 572 }
 573
 574 static const struct v4l2_ctrl_ops cx25821_ctrl_ops = {
 575         .s_ctrl = cx25821_s_ctrl,
 576 };
 577
 578 static const struct v4l2_file_operations video_fops = {
 579         .owner = THIS_MODULE,
 580         .open = v4l2_fh_open,
 581         .release        = vb2_fop_release,
 582         .read           = vb2_fop_read,
 583         .poll           = vb2_fop_poll,
 584         .unlocked_ioctl = video_ioctl2,
 585         .mmap           = vb2_fop_mmap,
 586 };
 587
 588 static const struct v4l2_ioctl_ops video_ioctl_ops = {
 589         .vidioc_querycap = cx25821_vidioc_querycap,
 590         .vidioc_enum_fmt_vid_cap = cx25821_vidioc_enum_fmt_vid_cap,
 591         .vidioc_g_fmt_vid_cap = cx25821_vidioc_g_fmt_vid_cap,
 592         .vidioc_try_fmt_vid_cap = cx25821_vidioc_try_fmt_vid_cap,
 593         .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
 594         .vidioc_reqbufs       = vb2_ioctl_reqbufs,
 595         .vidioc_prepare_buf   = vb2_ioctl_prepare_buf,
 596         .vidioc_create_bufs   = vb2_ioctl_create_bufs,
 597         .vidioc_querybuf      = vb2_ioctl_querybuf,
 598         .vidioc_qbuf          = vb2_ioctl_qbuf,
 599         .vidioc_dqbuf         = vb2_ioctl_dqbuf,
 600         .vidioc_streamon      = vb2_ioctl_streamon,
 601         .vidioc_streamoff     = vb2_ioctl_streamoff,
 602         .vidioc_g_std = cx25821_vidioc_g_std,
 603         .vidioc_s_std = cx25821_vidioc_s_std,
 604         .vidioc_enum_input = cx25821_vidioc_enum_input,
 605         .vidioc_g_input = cx25821_vidioc_g_input,
 606         .vidioc_s_input = cx25821_vidioc_s_input,
 607         .vidioc_log_status = vidioc_log_status,
 608         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
 609         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
 610 };
 611
 612 static const struct video_device cx25821_video_device = {
 613         .name = "cx25821-video",
 614         .fops = &video_fops,
 615         .release = video_device_release_empty,
 616         .minor = -1,
 617         .ioctl_ops = &video_ioctl_ops,
 618         .tvnorms = CX25821_NORMS,
 619         .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
 620                        V4L2_CAP_STREAMING,
 621 };
 622
 623 static const struct v4l2_file_operations video_out_fops = {
 624         .owner = THIS_MODULE,
 625         .open = v4l2_fh_open,
 626         .release        = vb2_fop_release,
 627         .write          = vb2_fop_write,
 628         .poll           = vb2_fop_poll,
 629         .unlocked_ioctl = video_ioctl2,
 630         .mmap           = vb2_fop_mmap,
 631 };
 632
 633 static const struct v4l2_ioctl_ops video_out_ioctl_ops = {
 634         .vidioc_querycap = cx25821_vidioc_querycap,
 635         .vidioc_enum_fmt_vid_out = cx25821_vidioc_enum_fmt_vid_cap,
 636         .vidioc_g_fmt_vid_out = cx25821_vidioc_g_fmt_vid_cap,
 637         .vidioc_try_fmt_vid_out = cx25821_vidioc_try_fmt_vid_out,
 638         .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
 639         .vidioc_g_std = cx25821_vidioc_g_std,
 640         .vidioc_s_std = cx25821_vidioc_s_std,
 641         .vidioc_enum_output = cx25821_vidioc_enum_output,
 642         .vidioc_g_output = cx25821_vidioc_g_output,
 643         .vidioc_s_output = cx25821_vidioc_s_output,
 644         .vidioc_log_status = vidioc_log_status,
 645 };
 646
 647 static const struct video_device cx25821_video_out_device = {
 648         .name = "cx25821-video",
 649         .fops = &video_out_fops,
 650         .release = video_device_release_empty,
 651         .minor = -1,
 652         .ioctl_ops = &video_out_ioctl_ops,
 653         .tvnorms = CX25821_NORMS,
 654         .device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_READWRITE,
 655 };
 656
 657 void cx25821_video_unregister(struct cx25821_dev *dev, int chan_num)
 658 {
 659         cx_clear(PCI_INT_MSK, 1);
 660
 661         if (video_is_registered(&dev->channels[chan_num].vdev)) {
 662                 video_unregister_device(&dev->channels[chan_num].vdev);
 663                 v4l2_ctrl_handler_free(&dev->channels[chan_num].hdl);
 664         }
 665 }
 666
 667 int cx25821_video_register(struct cx25821_dev *dev)
 668 {
 669         int err;
 670         int i;
 671
 672         /* initial device configuration */
 673         dev->tvnorm = V4L2_STD_NTSC_M;
 674
 675         spin_lock_init(&dev->slock);
 676
 677         for (i = 0; i < MAX_VID_CAP_CHANNEL_NUM - 1; ++i) {
 678                 struct cx25821_channel *chan = &dev->channels[i];
 679                 struct video_device *vdev = &chan->vdev;
 680                 struct v4l2_ctrl_handler *hdl = &chan->hdl;
 681                 struct vb2_queue *q;
 682                 bool is_output = i > SRAM_CH08;
 683
 684                 if (i == SRAM_CH08) /* audio channel */
 685                         continue;
 686
 687                 if (!is_output) {
 688                         v4l2_ctrl_handler_init(hdl, 4);
 689                         v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
 690                                         V4L2_CID_BRIGHTNESS, 0, 10000, 1, 6200);
 691                         v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
 692                                         V4L2_CID_CONTRAST, 0, 10000, 1, 5000);
 693                         v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
 694                                         V4L2_CID_SATURATION, 0, 10000, 1, 5000);
 695                         v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
 696                                         V4L2_CID_HUE, 0, 10000, 1, 5000);
 697                         if (hdl->error) {
 698                                 err = hdl->error;
 699                                 goto fail_unreg;
 700                         }
 701                         err = v4l2_ctrl_handler_setup(hdl);
 702                         if (err)
 703                                 goto fail_unreg;
 704                 } else {
 705                         chan->out = &dev->vid_out_data[i - SRAM_CH09];
 706                         chan->out->chan = chan;
 707                 }
 708
 709                 chan->sram_channels = &cx25821_sram_channels[i];
 710                 chan->width = 720;
 711                 chan->field = V4L2_FIELD_INTERLACED;
 712                 if (dev->tvnorm & V4L2_STD_625_50)
 713                         chan->height = 576;
 714                 else
 715                         chan->height = 480;
 716
 717                 if (chan->pixel_formats == PIXEL_FRMT_411)
 718                         chan->fmt = cx25821_format_by_fourcc(V4L2_PIX_FMT_Y41P);
 719                 else
 720                         chan->fmt = cx25821_format_by_fourcc(V4L2_PIX_FMT_YUYV);
 721
 722                 cx_write(chan->sram_channels->int_stat, 0xffffffff);
 723
 724                 INIT_LIST_HEAD(&chan->dma_vidq.active);
 725
 726                 q = &chan->vidq;
 727
 728                 q->type = is_output ? V4L2_BUF_TYPE_VIDEO_OUTPUT :
 729                                       V4L2_BUF_TYPE_VIDEO_CAPTURE;
 730                 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
 731                 q->io_modes |= is_output ? VB2_WRITE : VB2_READ;
 732                 q->gfp_flags = GFP_DMA32;
 733                 q->min_queued_buffers = 2;
 734                 q->drv_priv = chan;
 735                 q->buf_struct_size = sizeof(struct cx25821_buffer);
 736                 q->ops = &cx25821_video_qops;
 737                 q->mem_ops = &vb2_dma_sg_memops;
 738                 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 739                 q->lock = &dev->lock;
 740                 q->dev = &dev->pci->dev;
 741
 742                 if (!is_output) {
 743                         err = vb2_queue_init(q);
 744                         if (err < 0)
 745                                 goto fail_unreg;
 746                 }
 747
 748                 /* register v4l devices */
 749                 *vdev = is_output ? cx25821_video_out_device : cx25821_video_device;
 750                 vdev->v4l2_dev = &dev->v4l2_dev;
 751                 if (!is_output)
 752                         vdev->ctrl_handler = hdl;
 753                 else
 754                         vdev->vfl_dir = VFL_DIR_TX;
 755                 vdev->lock = &dev->lock;
 756                 vdev->queue = q;
 757                 snprintf(vdev->name, sizeof(vdev->name), "%s #%d", dev->name, i);
 758                 video_set_drvdata(vdev, chan);
 759
 760                 err = video_register_device(vdev, VFL_TYPE_VIDEO,
 761                                             video_nr[dev->nr]);
 762
 763                 if (err < 0)
 764                         goto fail_unreg;
 765         }
 766
 767         /* set PCI interrupt */
 768         cx_set(PCI_INT_MSK, 0xff);
 769
 770         return 0;
 771
 772 fail_unreg:
 773         while (i >= 0)
 774                 cx25821_video_unregister(dev, i--);
 775         return err;
 776 }