drivers/media/pci/cx18/cx18-streams.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  cx18 init/start/stop/exit stream functions
   4  *
   5  *  Derived from ivtv-streams.c
   6  *
   7  *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
   8  *  Copyright (C) 2008  Andy Walls <awalls@md.metrocast.net>
   9  */
  10
  11 #include "cx18-driver.h"
  12 #include "cx18-io.h"
  13 #include "cx18-fileops.h"
  14 #include "cx18-mailbox.h"
  15 #include "cx18-i2c.h"
  16 #include "cx18-queue.h"
  17 #include "cx18-ioctl.h"
  18 #include "cx18-streams.h"
  19 #include "cx18-cards.h"
  20 #include "cx18-scb.h"
  21 #include "cx18-dvb.h"
  22
  23 #define CX18_DSP0_INTERRUPT_MASK        0xd0004C
  24
  25 static const struct v4l2_file_operations cx18_v4l2_enc_fops = {
  26         .owner = THIS_MODULE,
  27         .read = cx18_v4l2_read,
  28         .open = cx18_v4l2_open,
  29         .unlocked_ioctl = video_ioctl2,
  30         .release = cx18_v4l2_close,
  31         .poll = cx18_v4l2_enc_poll,
  32         .mmap = cx18_v4l2_mmap,
  33 };
  34
  35 /* offset from 0 to register ts v4l2 minors on */
  36 #define CX18_V4L2_ENC_TS_OFFSET   16
  37 /* offset from 0 to register pcm v4l2 minors on */
  38 #define CX18_V4L2_ENC_PCM_OFFSET  24
  39 /* offset from 0 to register yuv v4l2 minors on */
  40 #define CX18_V4L2_ENC_YUV_OFFSET  32
  41
  42 static struct {
  43         const char *name;
  44         int vfl_type;
  45         int num_offset;
  46         int dma;
  47         u32 caps;
  48 } cx18_stream_info[] = {
  49         {       /* CX18_ENC_STREAM_TYPE_MPG */
  50                 "encoder MPEG",
  51                 VFL_TYPE_VIDEO, 0,
  52                 DMA_FROM_DEVICE,
  53                 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
  54                 V4L2_CAP_AUDIO | V4L2_CAP_TUNER
  55         },
  56         {       /* CX18_ENC_STREAM_TYPE_TS */
  57                 "TS",
  58                 VFL_TYPE_VIDEO, -1,
  59                 DMA_FROM_DEVICE,
  60         },
  61         {       /* CX18_ENC_STREAM_TYPE_YUV */
  62                 "encoder YUV",
  63                 VFL_TYPE_VIDEO, CX18_V4L2_ENC_YUV_OFFSET,
  64                 DMA_FROM_DEVICE,
  65                 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
  66                 V4L2_CAP_STREAMING | V4L2_CAP_AUDIO | V4L2_CAP_TUNER
  67         },
  68         {       /* CX18_ENC_STREAM_TYPE_VBI */
  69                 "encoder VBI",
  70                 VFL_TYPE_VBI, 0,
  71                 DMA_FROM_DEVICE,
  72                 V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE |
  73                 V4L2_CAP_READWRITE | V4L2_CAP_TUNER
  74         },
  75         {       /* CX18_ENC_STREAM_TYPE_PCM */
  76                 "encoder PCM audio",
  77                 VFL_TYPE_VIDEO, CX18_V4L2_ENC_PCM_OFFSET,
  78                 DMA_FROM_DEVICE,
  79                 V4L2_CAP_TUNER | V4L2_CAP_AUDIO | V4L2_CAP_READWRITE,
  80         },
  81         {       /* CX18_ENC_STREAM_TYPE_IDX */
  82                 "encoder IDX",
  83                 VFL_TYPE_VIDEO, -1,
  84                 DMA_FROM_DEVICE,
  85         },
  86         {       /* CX18_ENC_STREAM_TYPE_RAD */
  87                 "encoder radio",
  88                 VFL_TYPE_RADIO, 0,
  89                 DMA_NONE,
  90                 V4L2_CAP_RADIO | V4L2_CAP_TUNER
  91         },
  92 };
  93
  94
  95 static void cx18_dma_free(struct videobuf_queue *q,
  96         struct cx18_stream *s, struct cx18_videobuf_buffer *buf)
  97 {
  98         videobuf_waiton(q, &buf->vb, 0, 0);
  99         videobuf_vmalloc_free(&buf->vb);
 100         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 101 }
 102
 103 static int cx18_prepare_buffer(struct videobuf_queue *q,
 104         struct cx18_stream *s,
 105         struct cx18_videobuf_buffer *buf,
 106         u32 pixelformat,
 107         unsigned int width, unsigned int height,
 108         enum v4l2_field field)
 109 {
 110         struct cx18 *cx = s->cx;
 111         int rc = 0;
 112
 113         /* check settings */
 114         buf->bytes_used = 0;
 115
 116         if ((width  < 48) || (height < 32))
 117                 return -EINVAL;
 118
 119         buf->vb.size = (width * height * 2);
 120         if ((buf->vb.baddr != 0) && (buf->vb.bsize < buf->vb.size))
 121                 return -EINVAL;
 122
 123         /* alloc + fill struct (if changed) */
 124         if (buf->vb.width != width || buf->vb.height != height ||
 125             buf->vb.field != field || s->pixelformat != pixelformat ||
 126             buf->tvnorm != cx->std) {
 127
 128                 buf->vb.width  = width;
 129                 buf->vb.height = height;
 130                 buf->vb.field  = field;
 131                 buf->tvnorm    = cx->std;
 132                 s->pixelformat = pixelformat;
 133
 134                 /* HM12 YUV size is (Y=(h*720) + UV=(h*(720/2)))
 135                    UYUV YUV size is (Y=(h*720) + UV=(h*(720))) */
 136                 if (s->pixelformat == V4L2_PIX_FMT_NV12_16L16)
 137                         s->vb_bytes_per_frame = height * 720 * 3 / 2;
 138                 else
 139                         s->vb_bytes_per_frame = height * 720 * 2;
 140                 cx18_dma_free(q, s, buf);
 141         }
 142
 143         if ((buf->vb.baddr != 0) && (buf->vb.bsize < buf->vb.size))
 144                 return -EINVAL;
 145
 146         if (buf->vb.field == 0)
 147                 buf->vb.field = V4L2_FIELD_INTERLACED;
 148
 149         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
 150                 buf->vb.width  = width;
 151                 buf->vb.height = height;
 152                 buf->vb.field  = field;
 153                 buf->tvnorm    = cx->std;
 154                 s->pixelformat = pixelformat;
 155
 156                 /* HM12 YUV size is (Y=(h*720) + UV=(h*(720/2)))
 157                    UYUV YUV size is (Y=(h*720) + UV=(h*(720))) */
 158                 if (s->pixelformat == V4L2_PIX_FMT_NV12_16L16)
 159                         s->vb_bytes_per_frame = height * 720 * 3 / 2;
 160                 else
 161                         s->vb_bytes_per_frame = height * 720 * 2;
 162                 rc = videobuf_iolock(q, &buf->vb, NULL);
 163                 if (rc != 0)
 164                         goto fail;
 165         }
 166         buf->vb.state = VIDEOBUF_PREPARED;
 167         return 0;
 168
 169 fail:
 170         cx18_dma_free(q, s, buf);
 171         return rc;
 172
 173 }
 174
 175 /* VB_MIN_BUFSIZE is lcm(1440 * 480, 1440 * 576)
 176    1440 is a single line of 4:2:2 YUV at 720 luma samples wide
 177 */
 178 #define VB_MIN_BUFFERS 32
 179 #define VB_MIN_BUFSIZE 4147200
 180
 181 static int buffer_setup(struct videobuf_queue *q,
 182         unsigned int *count, unsigned int *size)
 183 {
 184         struct cx18_stream *s = q->priv_data;
 185         struct cx18 *cx = s->cx;
 186
 187         *size = 2 * cx->cxhdl.width * cx->cxhdl.height;
 188         if (*count == 0)
 189                 *count = VB_MIN_BUFFERS;
 190
 191         while (*size * *count > VB_MIN_BUFFERS * VB_MIN_BUFSIZE)
 192                 (*count)--;
 193
 194         q->field = V4L2_FIELD_INTERLACED;
 195         q->last = V4L2_FIELD_INTERLACED;
 196
 197         return 0;
 198 }
 199
 200 static int buffer_prepare(struct videobuf_queue *q,
 201         struct videobuf_buffer *vb,
 202         enum v4l2_field field)
 203 {
 204         struct cx18_videobuf_buffer *buf =
 205                 container_of(vb, struct cx18_videobuf_buffer, vb);
 206         struct cx18_stream *s = q->priv_data;
 207         struct cx18 *cx = s->cx;
 208
 209         return cx18_prepare_buffer(q, s, buf, s->pixelformat,
 210                 cx->cxhdl.width, cx->cxhdl.height, field);
 211 }
 212
 213 static void buffer_release(struct videobuf_queue *q,
 214         struct videobuf_buffer *vb)
 215 {
 216         struct cx18_videobuf_buffer *buf =
 217                 container_of(vb, struct cx18_videobuf_buffer, vb);
 218         struct cx18_stream *s = q->priv_data;
 219
 220         cx18_dma_free(q, s, buf);
 221 }
 222
 223 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
 224 {
 225         struct cx18_videobuf_buffer *buf =
 226                 container_of(vb, struct cx18_videobuf_buffer, vb);
 227         struct cx18_stream *s = q->priv_data;
 228
 229         buf->vb.state = VIDEOBUF_QUEUED;
 230
 231         list_add_tail(&buf->vb.queue, &s->vb_capture);
 232 }
 233
 234 static const struct videobuf_queue_ops cx18_videobuf_qops = {
 235         .buf_setup    = buffer_setup,
 236         .buf_prepare  = buffer_prepare,
 237         .buf_queue    = buffer_queue,
 238         .buf_release  = buffer_release,
 239 };
 240
 241 static void cx18_stream_init(struct cx18 *cx, int type)
 242 {
 243         struct cx18_stream *s = &cx->streams[type];
 244
 245         memset(s, 0, sizeof(*s));
 246
 247         /* initialize cx18_stream fields */
 248         s->dvb = NULL;
 249         s->cx = cx;
 250         s->type = type;
 251         s->name = cx18_stream_info[type].name;
 252         s->handle = CX18_INVALID_TASK_HANDLE;
 253
 254         s->dma = cx18_stream_info[type].dma;
 255         s->v4l2_dev_caps = cx18_stream_info[type].caps;
 256         s->buffers = cx->stream_buffers[type];
 257         s->buf_size = cx->stream_buf_size[type];
 258         INIT_LIST_HEAD(&s->buf_pool);
 259         s->bufs_per_mdl = 1;
 260         s->mdl_size = s->buf_size * s->bufs_per_mdl;
 261
 262         init_waitqueue_head(&s->waitq);
 263         s->id = -1;
 264         spin_lock_init(&s->q_free.lock);
 265         cx18_queue_init(&s->q_free);
 266         spin_lock_init(&s->q_busy.lock);
 267         cx18_queue_init(&s->q_busy);
 268         spin_lock_init(&s->q_full.lock);
 269         cx18_queue_init(&s->q_full);
 270         spin_lock_init(&s->q_idle.lock);
 271         cx18_queue_init(&s->q_idle);
 272
 273         INIT_WORK(&s->out_work_order, cx18_out_work_handler);
 274
 275         INIT_LIST_HEAD(&s->vb_capture);
 276         timer_setup(&s->vb_timeout, cx18_vb_timeout, 0);
 277         spin_lock_init(&s->vb_lock);
 278         if (type == CX18_ENC_STREAM_TYPE_YUV) {
 279                 spin_lock_init(&s->vbuf_q_lock);
 280
 281                 s->vb_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 282                 videobuf_queue_vmalloc_init(&s->vbuf_q, &cx18_videobuf_qops,
 283                         &cx->pci_dev->dev, &s->vbuf_q_lock,
 284                         V4L2_BUF_TYPE_VIDEO_CAPTURE,
 285                         V4L2_FIELD_INTERLACED,
 286                         sizeof(struct cx18_videobuf_buffer),
 287                         s, &cx->serialize_lock);
 288
 289                 /* Assume the previous pixel default */
 290                 s->pixelformat = V4L2_PIX_FMT_NV12_16L16;
 291                 s->vb_bytes_per_frame = cx->cxhdl.height * 720 * 3 / 2;
 292                 s->vb_bytes_per_line = 720;
 293         }
 294 }
 295
 296 static int cx18_prep_dev(struct cx18 *cx, int type)
 297 {
 298         struct cx18_stream *s = &cx->streams[type];
 299         u32 cap = cx->v4l2_cap;
 300         int num_offset = cx18_stream_info[type].num_offset;
 301         int num = cx->instance + cx18_first_minor + num_offset;
 302
 303         /*
 304          * These five fields are always initialized.
 305          * For analog capture related streams, if video_dev.v4l2_dev == NULL then the
 306          * stream is not in use.
 307          * For the TS stream, if dvb == NULL then the stream is not in use.
 308          * In those cases no other fields but these four can be used.
 309          */
 310         s->video_dev.v4l2_dev = NULL;
 311         s->dvb = NULL;
 312         s->cx = cx;
 313         s->type = type;
 314         s->name = cx18_stream_info[type].name;
 315
 316         /* Check whether the radio is supported */
 317         if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
 318                 return 0;
 319
 320         /* Check whether VBI is supported */
 321         if (type == CX18_ENC_STREAM_TYPE_VBI &&
 322             !(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
 323                 return 0;
 324
 325         /* User explicitly selected 0 buffers for these streams, so don't
 326            create them. */
 327         if (cx18_stream_info[type].dma != DMA_NONE &&
 328             cx->stream_buffers[type] == 0) {
 329                 CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
 330                 return 0;
 331         }
 332
 333         cx18_stream_init(cx, type);
 334
 335         /* Allocate the cx18_dvb struct only for the TS on cards with DTV */
 336         if (type == CX18_ENC_STREAM_TYPE_TS) {
 337                 if (cx->card->hw_all & CX18_HW_DVB) {
 338                         s->dvb = kzalloc(sizeof(struct cx18_dvb), GFP_KERNEL);
 339                         if (s->dvb == NULL) {
 340                                 CX18_ERR("Couldn't allocate cx18_dvb structure for %s\n",
 341                                          s->name);
 342                                 return -ENOMEM;
 343                         }
 344                 } else {
 345                         /* Don't need buffers for the TS, if there is no DVB */
 346                         s->buffers = 0;
 347                 }
 348         }
 349
 350         if (num_offset == -1)
 351                 return 0;
 352
 353         /* initialize the v4l2 video device structure */
 354         snprintf(s->video_dev.name, sizeof(s->video_dev.name), "%s %s",
 355                  cx->v4l2_dev.name, s->name);
 356
 357         s->video_dev.num = num;
 358         s->video_dev.v4l2_dev = &cx->v4l2_dev;
 359         s->video_dev.fops = &cx18_v4l2_enc_fops;
 360         s->video_dev.release = video_device_release_empty;
 361         if (cx->card->video_inputs->video_type == CX18_CARD_INPUT_VID_TUNER)
 362                 s->video_dev.tvnorms = cx->tuner_std;
 363         else
 364                 s->video_dev.tvnorms = V4L2_STD_ALL;
 365         s->video_dev.lock = &cx->serialize_lock;
 366         cx18_set_funcs(&s->video_dev);
 367         return 0;
 368 }
 369
 370 /* Initialize v4l2 variables and register v4l2 devices */
 371 int cx18_streams_setup(struct cx18 *cx)
 372 {
 373         int type, ret;
 374
 375         /* Setup V4L2 Devices */
 376         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 377                 /* Prepare device */
 378                 ret = cx18_prep_dev(cx, type);
 379                 if (ret < 0)
 380                         break;
 381
 382                 /* Allocate Stream */
 383                 ret = cx18_stream_alloc(&cx->streams[type]);
 384                 if (ret < 0)
 385                         break;
 386         }
 387         if (type == CX18_MAX_STREAMS)
 388                 return 0;
 389
 390         /* One or more streams could not be initialized. Clean 'em all up. */
 391         cx18_streams_cleanup(cx, 0);
 392         return ret;
 393 }
 394
 395 static int cx18_reg_dev(struct cx18 *cx, int type)
 396 {
 397         struct cx18_stream *s = &cx->streams[type];
 398         int vfl_type = cx18_stream_info[type].vfl_type;
 399         const char *name;
 400         int num, ret;
 401
 402         if (type == CX18_ENC_STREAM_TYPE_TS && s->dvb != NULL) {
 403                 ret = cx18_dvb_register(s);
 404                 if (ret < 0) {
 405                         CX18_ERR("DVB failed to register\n");
 406                         return ret;
 407                 }
 408         }
 409
 410         if (s->video_dev.v4l2_dev == NULL)
 411                 return 0;
 412
 413         num = s->video_dev.num;
 414         s->video_dev.device_caps = s->v4l2_dev_caps;    /* device capabilities */
 415         /* card number + user defined offset + device offset */
 416         if (type != CX18_ENC_STREAM_TYPE_MPG) {
 417                 struct cx18_stream *s_mpg = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
 418
 419                 if (s_mpg->video_dev.v4l2_dev)
 420                         num = s_mpg->video_dev.num
 421                             + cx18_stream_info[type].num_offset;
 422         }
 423         video_set_drvdata(&s->video_dev, s);
 424
 425         /* Register device. First try the desired minor, then any free one. */
 426         ret = video_register_device_no_warn(&s->video_dev, vfl_type, num);
 427         if (ret < 0) {
 428                 CX18_ERR("Couldn't register v4l2 device for %s (device node number %d)\n",
 429                         s->name, num);
 430                 s->video_dev.v4l2_dev = NULL;
 431                 return ret;
 432         }
 433
 434         name = video_device_node_name(&s->video_dev);
 435
 436         switch (vfl_type) {
 437         case VFL_TYPE_VIDEO:
 438                 CX18_INFO("Registered device %s for %s (%d x %d.%02d kB)\n",
 439                           name, s->name, cx->stream_buffers[type],
 440                           cx->stream_buf_size[type] / 1024,
 441                           (cx->stream_buf_size[type] * 100 / 1024) % 100);
 442                 break;
 443
 444         case VFL_TYPE_RADIO:
 445                 CX18_INFO("Registered device %s for %s\n", name, s->name);
 446                 break;
 447
 448         case VFL_TYPE_VBI:
 449                 if (cx->stream_buffers[type])
 450                         CX18_INFO("Registered device %s for %s (%d x %d bytes)\n",
 451                                   name, s->name, cx->stream_buffers[type],
 452                                   cx->stream_buf_size[type]);
 453                 else
 454                         CX18_INFO("Registered device %s for %s\n",
 455                                 name, s->name);
 456                 break;
 457         }
 458
 459         return 0;
 460 }
 461
 462 /* Register v4l2 devices */
 463 int cx18_streams_register(struct cx18 *cx)
 464 {
 465         int type;
 466         int err;
 467         int ret = 0;
 468
 469         /* Register V4L2 devices */
 470         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 471                 err = cx18_reg_dev(cx, type);
 472                 if (err && ret == 0)
 473                         ret = err;
 474         }
 475
 476         if (ret == 0)
 477                 return 0;
 478
 479         /* One or more streams could not be initialized. Clean 'em all up. */
 480         cx18_streams_cleanup(cx, 1);
 481         return ret;
 482 }
 483
 484 /* Unregister v4l2 devices */
 485 void cx18_streams_cleanup(struct cx18 *cx, int unregister)
 486 {
 487         struct video_device *vdev;
 488         int type;
 489
 490         /* Teardown all streams */
 491         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 492
 493                 /* The TS has a cx18_dvb structure, not a video_device */
 494                 if (type == CX18_ENC_STREAM_TYPE_TS) {
 495                         if (cx->streams[type].dvb != NULL) {
 496                                 if (unregister)
 497                                         cx18_dvb_unregister(&cx->streams[type]);
 498                                 kfree(cx->streams[type].dvb);
 499                                 cx->streams[type].dvb = NULL;
 500                                 cx18_stream_free(&cx->streams[type]);
 501                         }
 502                         continue;
 503                 }
 504
 505                 /* No struct video_device, but can have buffers allocated */
 506                 if (type == CX18_ENC_STREAM_TYPE_IDX) {
 507                         /* If the module params didn't inhibit IDX ... */
 508                         if (cx->stream_buffers[type] != 0) {
 509                                 cx->stream_buffers[type] = 0;
 510                                 /*
 511                                  * Before calling cx18_stream_free(),
 512                                  * check if the IDX stream was actually set up.
 513                                  * Needed, since the cx18_probe() error path
 514                                  * exits through here as well as normal clean up
 515                                  */
 516                                 if (cx->streams[type].buffers != 0)
 517                                         cx18_stream_free(&cx->streams[type]);
 518                         }
 519                         continue;
 520                 }
 521
 522                 /* If struct video_device exists, can have buffers allocated */
 523                 vdev = &cx->streams[type].video_dev;
 524
 525                 if (vdev->v4l2_dev == NULL)
 526                         continue;
 527
 528                 if (type == CX18_ENC_STREAM_TYPE_YUV)
 529                         videobuf_mmap_free(&cx->streams[type].vbuf_q);
 530
 531                 cx18_stream_free(&cx->streams[type]);
 532
 533                 video_unregister_device(vdev);
 534         }
 535 }
 536
 537 static void cx18_vbi_setup(struct cx18_stream *s)
 538 {
 539         struct cx18 *cx = s->cx;
 540         int raw = cx18_raw_vbi(cx);
 541         u32 data[CX2341X_MBOX_MAX_DATA];
 542         int lines;
 543
 544         if (cx->is_60hz) {
 545                 cx->vbi.count = 12;
 546                 cx->vbi.start[0] = 10;
 547                 cx->vbi.start[1] = 273;
 548         } else {        /* PAL/SECAM */
 549                 cx->vbi.count = 18;
 550                 cx->vbi.start[0] = 6;
 551                 cx->vbi.start[1] = 318;
 552         }
 553
 554         /* setup VBI registers */
 555         if (raw)
 556                 v4l2_subdev_call(cx->sd_av, vbi, s_raw_fmt, &cx->vbi.in.fmt.vbi);
 557         else
 558                 v4l2_subdev_call(cx->sd_av, vbi, s_sliced_fmt, &cx->vbi.in.fmt.sliced);
 559
 560         /*
 561          * Send the CX18_CPU_SET_RAW_VBI_PARAM API command to setup Encoder Raw
 562          * VBI when the first analog capture channel starts, as once it starts
 563          * (e.g. MPEG), we can't effect any change in the Encoder Raw VBI setup
 564          * (i.e. for the VBI capture channels).  We also send it for each
 565          * analog capture channel anyway just to make sure we get the proper
 566          * behavior
 567          */
 568         if (raw) {
 569                 lines = cx->vbi.count * 2;
 570         } else {
 571                 /*
 572                  * For 525/60 systems, according to the VIP 2 & BT.656 std:
 573                  * The EAV RP code's Field bit toggles on line 4, a few lines
 574                  * after the Vertcal Blank bit has already toggled.
 575                  * Tell the encoder to capture 21-4+1=18 lines per field,
 576                  * since we want lines 10 through 21.
 577                  *
 578                  * For 625/50 systems, according to the VIP 2 & BT.656 std:
 579                  * The EAV RP code's Field bit toggles on line 1, a few lines
 580                  * after the Vertcal Blank bit has already toggled.
 581                  * (We've actually set the digitizer so that the Field bit
 582                  * toggles on line 2.) Tell the encoder to capture 23-2+1=22
 583                  * lines per field, since we want lines 6 through 23.
 584                  */
 585                 lines = cx->is_60hz ? (21 - 4 + 1) * 2 : (23 - 2 + 1) * 2;
 586         }
 587
 588         data[0] = s->handle;
 589         /* Lines per field */
 590         data[1] = (lines / 2) | ((lines / 2) << 16);
 591         /* bytes per line */
 592         data[2] = (raw ? VBI_ACTIVE_SAMPLES
 593                        : (cx->is_60hz ? VBI_HBLANK_SAMPLES_60HZ
 594                                       : VBI_HBLANK_SAMPLES_50HZ));
 595         /* Every X number of frames a VBI interrupt arrives
 596            (frames as in 25 or 30 fps) */
 597         data[3] = 1;
 598         /*
 599          * Set the SAV/EAV RP codes to look for as start/stop points
 600          * when in VIP-1.1 mode
 601          */
 602         if (raw) {
 603                 /*
 604                  * Start codes for beginning of "active" line in vertical blank
 605                  * 0x20 (               VerticalBlank                )
 606                  * 0x60 (     EvenField VerticalBlank                )
 607                  */
 608                 data[4] = 0x20602060;
 609                 /*
 610                  * End codes for end of "active" raw lines and regular lines
 611                  * 0x30 (               VerticalBlank HorizontalBlank)
 612                  * 0x70 (     EvenField VerticalBlank HorizontalBlank)
 613                  * 0x90 (Task                         HorizontalBlank)
 614                  * 0xd0 (Task EvenField               HorizontalBlank)
 615                  */
 616                 data[5] = 0x307090d0;
 617         } else {
 618                 /*
 619                  * End codes for active video, we want data in the hblank region
 620                  * 0xb0 (Task         0 VerticalBlank HorizontalBlank)
 621                  * 0xf0 (Task EvenField VerticalBlank HorizontalBlank)
 622                  *
 623                  * Since the V bit is only allowed to toggle in the EAV RP code,
 624                  * just before the first active region line, these two
 625                  * are problematic:
 626                  * 0x90 (Task                         HorizontalBlank)
 627                  * 0xd0 (Task EvenField               HorizontalBlank)
 628                  *
 629                  * We have set the digitzer such that we don't have to worry
 630                  * about these problem codes.
 631                  */
 632                 data[4] = 0xB0F0B0F0;
 633                 /*
 634                  * Start codes for beginning of active line in vertical blank
 635                  * 0xa0 (Task           VerticalBlank                )
 636                  * 0xe0 (Task EvenField VerticalBlank                )
 637                  */
 638                 data[5] = 0xA0E0A0E0;
 639         }
 640
 641         CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
 642                         data[0], data[1], data[2], data[3], data[4], data[5]);
 643
 644         cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
 645 }
 646
 647 void cx18_stream_rotate_idx_mdls(struct cx18 *cx)
 648 {
 649         struct cx18_stream *s = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
 650         struct cx18_mdl *mdl;
 651
 652         if (!cx18_stream_enabled(s))
 653                 return;
 654
 655         /* Return if the firmware is not running low on MDLs */
 656         if ((atomic_read(&s->q_free.depth) + atomic_read(&s->q_busy.depth)) >=
 657                                             CX18_ENC_STREAM_TYPE_IDX_FW_MDL_MIN)
 658                 return;
 659
 660         /* Return if there are no MDLs to rotate back to the firmware */
 661         if (atomic_read(&s->q_full.depth) < 2)
 662                 return;
 663
 664         /*
 665          * Take the oldest IDX MDL still holding data, and discard its index
 666          * entries by scheduling the MDL to go back to the firmware
 667          */
 668         mdl = cx18_dequeue(s, &s->q_full);
 669         if (mdl != NULL)
 670                 cx18_enqueue(s, mdl, &s->q_free);
 671 }
 672
 673 static
 674 struct cx18_queue *_cx18_stream_put_mdl_fw(struct cx18_stream *s,
 675                                            struct cx18_mdl *mdl)
 676 {
 677         struct cx18 *cx = s->cx;
 678         struct cx18_queue *q;
 679
 680         /* Don't give it to the firmware, if we're not running a capture */
 681         if (s->handle == CX18_INVALID_TASK_HANDLE ||
 682             test_bit(CX18_F_S_STOPPING, &s->s_flags) ||
 683             !test_bit(CX18_F_S_STREAMING, &s->s_flags))
 684                 return cx18_enqueue(s, mdl, &s->q_free);
 685
 686         q = cx18_enqueue(s, mdl, &s->q_busy);
 687         if (q != &s->q_busy)
 688                 return q; /* The firmware has the max MDLs it can handle */
 689
 690         cx18_mdl_sync_for_device(s, mdl);
 691         cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
 692                   (void __iomem *) &cx->scb->cpu_mdl[mdl->id] - cx->enc_mem,
 693                   s->bufs_per_mdl, mdl->id, s->mdl_size);
 694         return q;
 695 }
 696
 697 static
 698 void _cx18_stream_load_fw_queue(struct cx18_stream *s)
 699 {
 700         struct cx18_queue *q;
 701         struct cx18_mdl *mdl;
 702
 703         if (atomic_read(&s->q_free.depth) == 0 ||
 704             atomic_read(&s->q_busy.depth) >= CX18_MAX_FW_MDLS_PER_STREAM)
 705                 return;
 706
 707         /* Move from q_free to q_busy notifying the firmware, until the limit */
 708         do {
 709                 mdl = cx18_dequeue(s, &s->q_free);
 710                 if (mdl == NULL)
 711                         break;
 712                 q = _cx18_stream_put_mdl_fw(s, mdl);
 713         } while (atomic_read(&s->q_busy.depth) < CX18_MAX_FW_MDLS_PER_STREAM
 714                  && q == &s->q_busy);
 715 }
 716
 717 void cx18_out_work_handler(struct work_struct *work)
 718 {
 719         struct cx18_stream *s =
 720                          container_of(work, struct cx18_stream, out_work_order);
 721
 722         _cx18_stream_load_fw_queue(s);
 723 }
 724
 725 static void cx18_stream_configure_mdls(struct cx18_stream *s)
 726 {
 727         cx18_unload_queues(s);
 728
 729         switch (s->type) {
 730         case CX18_ENC_STREAM_TYPE_YUV:
 731                 /*
 732                  * Height should be a multiple of 32 lines.
 733                  * Set the MDL size to the exact size needed for one frame.
 734                  * Use enough buffers per MDL to cover the MDL size
 735                  */
 736                 if (s->pixelformat == V4L2_PIX_FMT_NV12_16L16)
 737                         s->mdl_size = 720 * s->cx->cxhdl.height * 3 / 2;
 738                 else
 739                         s->mdl_size = 720 * s->cx->cxhdl.height * 2;
 740                 s->bufs_per_mdl = s->mdl_size / s->buf_size;
 741                 if (s->mdl_size % s->buf_size)
 742                         s->bufs_per_mdl++;
 743                 break;
 744         case CX18_ENC_STREAM_TYPE_VBI:
 745                 s->bufs_per_mdl = 1;
 746                 if  (cx18_raw_vbi(s->cx)) {
 747                         s->mdl_size = (s->cx->is_60hz ? 12 : 18)
 748                                                        * 2 * VBI_ACTIVE_SAMPLES;
 749                 } else {
 750                         /*
 751                          * See comment in cx18_vbi_setup() below about the
 752                          * extra lines we capture in sliced VBI mode due to
 753                          * the lines on which EAV RP codes toggle.
 754                         */
 755                         s->mdl_size = s->cx->is_60hz
 756                                    ? (21 - 4 + 1) * 2 * VBI_HBLANK_SAMPLES_60HZ
 757                                    : (23 - 2 + 1) * 2 * VBI_HBLANK_SAMPLES_50HZ;
 758                 }
 759                 break;
 760         default:
 761                 s->bufs_per_mdl = 1;
 762                 s->mdl_size = s->buf_size * s->bufs_per_mdl;
 763                 break;
 764         }
 765
 766         cx18_load_queues(s);
 767 }
 768
 769 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
 770 {
 771         u32 data[MAX_MB_ARGUMENTS];
 772         struct cx18 *cx = s->cx;
 773         int captype = 0;
 774         struct cx18_stream *s_idx;
 775
 776         if (!cx18_stream_enabled(s))
 777                 return -EINVAL;
 778
 779         CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
 780
 781         switch (s->type) {
 782         case CX18_ENC_STREAM_TYPE_MPG:
 783                 captype = CAPTURE_CHANNEL_TYPE_MPEG;
 784                 cx->mpg_data_received = cx->vbi_data_inserted = 0;
 785                 cx->dualwatch_jiffies = jiffies;
 786                 cx->dualwatch_stereo_mode = v4l2_ctrl_g_ctrl(cx->cxhdl.audio_mode);
 787                 cx->search_pack_header = 0;
 788                 break;
 789
 790         case CX18_ENC_STREAM_TYPE_IDX:
 791                 captype = CAPTURE_CHANNEL_TYPE_INDEX;
 792                 break;
 793         case CX18_ENC_STREAM_TYPE_TS:
 794                 captype = CAPTURE_CHANNEL_TYPE_TS;
 795                 break;
 796         case CX18_ENC_STREAM_TYPE_YUV:
 797                 captype = CAPTURE_CHANNEL_TYPE_YUV;
 798                 break;
 799         case CX18_ENC_STREAM_TYPE_PCM:
 800                 captype = CAPTURE_CHANNEL_TYPE_PCM;
 801                 break;
 802         case CX18_ENC_STREAM_TYPE_VBI:
 803 #ifdef CX18_ENCODER_PARSES_SLICED
 804                 captype = cx18_raw_vbi(cx) ?
 805                      CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
 806 #else
 807                 /*
 808                  * Currently we set things up so that Sliced VBI from the
 809                  * digitizer is handled as Raw VBI by the encoder
 810                  */
 811                 captype = CAPTURE_CHANNEL_TYPE_VBI;
 812 #endif
 813                 cx->vbi.frame = 0;
 814                 cx->vbi.inserted_frame = 0;
 815                 memset(cx->vbi.sliced_mpeg_size,
 816                         0, sizeof(cx->vbi.sliced_mpeg_size));
 817                 break;
 818         default:
 819                 return -EINVAL;
 820         }
 821
 822         /* Clear Streamoff flags in case left from last capture */
 823         clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
 824
 825         cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
 826         s->handle = data[0];
 827         cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
 828
 829         /*
 830          * For everything but CAPTURE_CHANNEL_TYPE_TS, play it safe and
 831          * set up all the parameters, as it is not obvious which parameters the
 832          * firmware shares across capture channel types and which it does not.
 833          *
 834          * Some of the cx18_vapi() calls below apply to only certain capture
 835          * channel types.  We're hoping there's no harm in calling most of them
 836          * anyway, as long as the values are all consistent.  Setting some
 837          * shared parameters will have no effect once an analog capture channel
 838          * has started streaming.
 839          */
 840         if (captype != CAPTURE_CHANNEL_TYPE_TS) {
 841                 cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
 842                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
 843                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
 844                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
 845
 846                 /*
 847                  * Audio related reset according to
 848                  * Documentation/driver-api/media/drivers/cx2341x-devel.rst
 849                  */
 850                 if (atomic_read(&cx->ana_capturing) == 0)
 851                         cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2,
 852                                   s->handle, 12);
 853
 854                 /*
 855                  * Number of lines for Field 1 & Field 2 according to
 856                  * Documentation/driver-api/media/drivers/cx2341x-devel.rst
 857                  * Field 1 is 312 for 625 line systems in BT.656
 858                  * Field 2 is 313 for 625 line systems in BT.656
 859                  */
 860                 cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
 861                           s->handle, 312, 313);
 862
 863                 if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
 864                         cx18_vbi_setup(s);
 865
 866                 /*
 867                  * Select to receive I, P, and B frame index entries, if the
 868                  * index stream is enabled.  Otherwise disable index entry
 869                  * generation.
 870                  */
 871                 s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
 872                 cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 2,
 873                                  s->handle, cx18_stream_enabled(s_idx) ? 7 : 0);
 874
 875                 /* Call out to the common CX2341x API setup for user controls */
 876                 cx->cxhdl.priv = s;
 877                 cx2341x_handler_setup(&cx->cxhdl);
 878
 879                 /*
 880                  * When starting a capture and we're set for radio,
 881                  * ensure the video is muted, despite the user control.
 882                  */
 883                 if (!cx->cxhdl.video_mute &&
 884                     test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
 885                         cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
 886                           (v4l2_ctrl_g_ctrl(cx->cxhdl.video_mute_yuv) << 8) | 1);
 887
 888                 /* Enable the Video Format Converter for UYVY 4:2:2 support,
 889                  * rather than the default HM12 Macroblovk 4:2:0 support.
 890                  */
 891                 if (captype == CAPTURE_CHANNEL_TYPE_YUV) {
 892                         if (s->pixelformat == V4L2_PIX_FMT_UYVY)
 893                                 cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2,
 894                                         s->handle, 1);
 895                         else
 896                                 /* If in doubt, default to HM12 */
 897                                 cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2,
 898                                         s->handle, 0);
 899                 }
 900         }
 901
 902         if (atomic_read(&cx->tot_capturing) == 0) {
 903                 cx2341x_handler_set_busy(&cx->cxhdl, 1);
 904                 clear_bit(CX18_F_I_EOS, &cx->i_flags);
 905                 cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
 906         }
 907
 908         cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
 909                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
 910                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
 911
 912         /* Init all the cpu_mdls for this stream */
 913         cx18_stream_configure_mdls(s);
 914         _cx18_stream_load_fw_queue(s);
 915
 916         /* begin_capture */
 917         if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
 918                 CX18_DEBUG_WARN("Error starting capture!\n");
 919                 /* Ensure we're really not capturing before releasing MDLs */
 920                 set_bit(CX18_F_S_STOPPING, &s->s_flags);
 921                 if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 922                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
 923                 else
 924                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 925                 clear_bit(CX18_F_S_STREAMING, &s->s_flags);
 926                 /* FIXME - CX18_F_S_STREAMOFF as well? */
 927                 cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 928                 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 929                 s->handle = CX18_INVALID_TASK_HANDLE;
 930                 clear_bit(CX18_F_S_STOPPING, &s->s_flags);
 931                 if (atomic_read(&cx->tot_capturing) == 0) {
 932                         set_bit(CX18_F_I_EOS, &cx->i_flags);
 933                         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
 934                 }
 935                 return -EINVAL;
 936         }
 937
 938         /* you're live! sit back and await interrupts :) */
 939         if (captype != CAPTURE_CHANNEL_TYPE_TS)
 940                 atomic_inc(&cx->ana_capturing);
 941         atomic_inc(&cx->tot_capturing);
 942         return 0;
 943 }
 944 EXPORT_SYMBOL(cx18_start_v4l2_encode_stream);
 945
 946 void cx18_stop_all_captures(struct cx18 *cx)
 947 {
 948         int i;
 949
 950         for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
 951                 struct cx18_stream *s = &cx->streams[i];
 952
 953                 if (!cx18_stream_enabled(s))
 954                         continue;
 955                 if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
 956                         cx18_stop_v4l2_encode_stream(s, 0);
 957         }
 958 }
 959
 960 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
 961 {
 962         struct cx18 *cx = s->cx;
 963
 964         if (!cx18_stream_enabled(s))
 965                 return -EINVAL;
 966
 967         /* This function assumes that you are allowed to stop the capture
 968            and that we are actually capturing */
 969
 970         CX18_DEBUG_INFO("Stop Capture\n");
 971
 972         if (atomic_read(&cx->tot_capturing) == 0)
 973                 return 0;
 974
 975         set_bit(CX18_F_S_STOPPING, &s->s_flags);
 976         if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 977                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
 978         else
 979                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 980
 981         if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
 982                 CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
 983         }
 984
 985         if (s->type != CX18_ENC_STREAM_TYPE_TS)
 986                 atomic_dec(&cx->ana_capturing);
 987         atomic_dec(&cx->tot_capturing);
 988
 989         /* Clear capture and no-read bits */
 990         clear_bit(CX18_F_S_STREAMING, &s->s_flags);
 991
 992         /* Tell the CX23418 it can't use our buffers anymore */
 993         cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 994
 995         cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 996         s->handle = CX18_INVALID_TASK_HANDLE;
 997         clear_bit(CX18_F_S_STOPPING, &s->s_flags);
 998
 999         if (atomic_read(&cx->tot_capturing) > 0)
1000                 return 0;
1001
1002         cx2341x_handler_set_busy(&cx->cxhdl, 0);
1003         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
1004         wake_up(&s->waitq);
1005
1006         return 0;
1007 }
1008 EXPORT_SYMBOL(cx18_stop_v4l2_encode_stream);
1009
1010 u32 cx18_find_handle(struct cx18 *cx)
1011 {
1012         int i;
1013
1014         /* find first available handle to be used for global settings */
1015         for (i = 0; i < CX18_MAX_STREAMS; i++) {
1016                 struct cx18_stream *s = &cx->streams[i];
1017
1018                 if (s->video_dev.v4l2_dev && (s->handle != CX18_INVALID_TASK_HANDLE))
1019                         return s->handle;
1020         }
1021         return CX18_INVALID_TASK_HANDLE;
1022 }
1023
1024 struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle)
1025 {
1026         int i;
1027         struct cx18_stream *s;
1028
1029         if (handle == CX18_INVALID_TASK_HANDLE)
1030                 return NULL;
1031
1032         for (i = 0; i < CX18_MAX_STREAMS; i++) {
1033                 s = &cx->streams[i];
1034                 if (s->handle != handle)
1035                         continue;
1036                 if (cx18_stream_enabled(s))
1037                         return s;
1038         }
1039         return NULL;
1040 }