linux/drivers/media/pci/cx25821/cx25821-video.c
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   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
  16MODULE_DESCRIPTION("v4l2 driver module for cx25821 based TV cards");
  17MODULE_AUTHOR("Hiep Huynh <hiep.huynh@conexant.com>");
  18MODULE_LICENSE("GPL");
  19
  20static unsigned int video_nr[] = {[0 ... (CX25821_MAXBOARDS - 1)] = UNSET };
  21
  22module_param_array(video_nr, int, NULL, 0444);
  23
  24MODULE_PARM_DESC(video_nr, "video device numbers");
  25
  26static unsigned int video_debug = VIDEO_DEBUG;
  27module_param(video_debug, int, 0644);
  28MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
  29
  30static unsigned int irq_debug;
  31module_param(irq_debug, int, 0644);
  32MODULE_PARM_DESC(irq_debug, "enable debug messages [IRQ handler]");
  33
  34#define FORMAT_FLAGS_PACKED       0x01
  35
  36static 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
  48static 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
  58int 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
  85int 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
 127static 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
 142static 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
 224static 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
 235static 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
 261static 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
 274static 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
 293static 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
 306static 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
 317static 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
 333static 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
 371static 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
 407static 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
 421static 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
 436static 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
 444static 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
 462static 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
 474static int cx25821_vidioc_g_input(struct file *file, void *priv, unsigned int *i)
 475{
 476        *i = 0;
 477        return 0;
 478}
 479
 480static int cx25821_vidioc_s_input(struct file *file, void *priv, unsigned int i)
 481{
 482        return i ? -EINVAL : 0;
 483}
 484
 485static 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
 510static 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
 522static int cx25821_vidioc_g_output(struct file *file, void *priv, unsigned int *o)
 523{
 524        *o = 0;
 525        return 0;
 526}
 527
 528static int cx25821_vidioc_s_output(struct file *file, void *priv, unsigned int o)
 529{
 530        return o ? -EINVAL : 0;
 531}
 532
 533static 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
 552static 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
 574static const struct v4l2_ctrl_ops cx25821_ctrl_ops = {
 575        .s_ctrl = cx25821_s_ctrl,
 576};
 577
 578static 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
 588static 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
 612static 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
 623static 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
 633static 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
 647static 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
 657void 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
 667int 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_buffers_needed = 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_GRABBER,
 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
 772fail_unreg:
 773        while (i >= 0)
 774                cx25821_video_unregister(dev, i--);
 775        return err;
 776}
 777