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 <[email protected]>
   8  *  Copyright (C) 2008  Andy Walls <[email protected]>
   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 };
  33
  34 static const struct v4l2_file_operations cx18_v4l2_enc_yuv_fops = {
  35         .owner = THIS_MODULE,
  36         .open = cx18_v4l2_open,
  37         .unlocked_ioctl = video_ioctl2,
  38         .release = cx18_v4l2_close,
  39         .poll = vb2_fop_poll,
  40         .read = vb2_fop_read,
  41         .mmap = vb2_fop_mmap,
  42 };
  43
  44 /* offset from 0 to register ts v4l2 minors on */
  45 #define CX18_V4L2_ENC_TS_OFFSET   16
  46 /* offset from 0 to register pcm v4l2 minors on */
  47 #define CX18_V4L2_ENC_PCM_OFFSET  24
  48 /* offset from 0 to register yuv v4l2 minors on */
  49 #define CX18_V4L2_ENC_YUV_OFFSET  32
  50
  51 static struct {
  52         const char *name;
  53         int vfl_type;
  54         int num_offset;
  55         int dma;
  56         u32 caps;
  57 } cx18_stream_info[] = {
  58         {       /* CX18_ENC_STREAM_TYPE_MPG */
  59                 "encoder MPEG",
  60                 VFL_TYPE_VIDEO, 0,
  61                 DMA_FROM_DEVICE,
  62                 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
  63                 V4L2_CAP_AUDIO | V4L2_CAP_TUNER
  64         },
  65         {       /* CX18_ENC_STREAM_TYPE_TS */
  66                 "TS",
  67                 VFL_TYPE_VIDEO, -1,
  68                 DMA_FROM_DEVICE,
  69         },
  70         {       /* CX18_ENC_STREAM_TYPE_YUV */
  71                 "encoder YUV",
  72                 VFL_TYPE_VIDEO, CX18_V4L2_ENC_YUV_OFFSET,
  73                 DMA_FROM_DEVICE,
  74                 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
  75                 V4L2_CAP_STREAMING | V4L2_CAP_AUDIO | V4L2_CAP_TUNER
  76         },
  77         {       /* CX18_ENC_STREAM_TYPE_VBI */
  78                 "encoder VBI",
  79                 VFL_TYPE_VBI, 0,
  80                 DMA_FROM_DEVICE,
  81                 V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE |
  82                 V4L2_CAP_READWRITE | V4L2_CAP_AUDIO | V4L2_CAP_TUNER
  83         },
  84         {       /* CX18_ENC_STREAM_TYPE_PCM */
  85                 "encoder PCM audio",
  86                 VFL_TYPE_VIDEO, CX18_V4L2_ENC_PCM_OFFSET,
  87                 DMA_FROM_DEVICE,
  88                 V4L2_CAP_TUNER | V4L2_CAP_AUDIO | V4L2_CAP_READWRITE,
  89         },
  90         {       /* CX18_ENC_STREAM_TYPE_IDX */
  91                 "encoder IDX",
  92                 VFL_TYPE_VIDEO, -1,
  93                 DMA_FROM_DEVICE,
  94         },
  95         {       /* CX18_ENC_STREAM_TYPE_RAD */
  96                 "encoder radio",
  97                 VFL_TYPE_RADIO, 0,
  98                 DMA_NONE,
  99                 V4L2_CAP_RADIO | V4L2_CAP_TUNER
 100         },
 101 };
 102
 103 static int cx18_queue_setup(struct vb2_queue *vq,
 104                             unsigned int *nbuffers, unsigned int *nplanes,
 105                             unsigned int sizes[], struct device *alloc_devs[])
 106 {
 107         unsigned int q_num_bufs = vb2_get_num_buffers(vq);
 108         struct cx18_stream *s = vb2_get_drv_priv(vq);
 109         struct cx18 *cx = s->cx;
 110         unsigned int szimage;
 111
 112         /*
 113          * HM12 YUV size is (Y=(h*720) + UV=(h*(720/2)))
 114          * UYUV YUV size is (Y=(h*720) + UV=(h*(720)))
 115          */
 116         if (s->pixelformat == V4L2_PIX_FMT_NV12_16L16)
 117                 szimage = cx->cxhdl.height * 720 * 3 / 2;
 118         else
 119                 szimage = cx->cxhdl.height * 720 * 2;
 120
 121         /*
 122          * Let's request at least three buffers: two for the
 123          * DMA engine and one for userspace.
 124          */
 125         if (q_num_bufs + *nbuffers < 3)
 126                 *nbuffers = 3 - q_num_bufs;
 127
 128         if (*nplanes) {
 129                 if (*nplanes != 1 || sizes[0] < szimage)
 130                         return -EINVAL;
 131                 return 0;
 132         }
 133
 134         sizes[0] = szimage;
 135         *nplanes = 1;
 136         return 0;
 137 }
 138
 139 static void cx18_buf_queue(struct vb2_buffer *vb)
 140 {
 141         struct cx18_stream *s = vb2_get_drv_priv(vb->vb2_queue);
 142         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 143         struct cx18_vb2_buffer *buf =
 144                 container_of(vbuf, struct cx18_vb2_buffer, vb);
 145         unsigned long flags;
 146
 147         spin_lock_irqsave(&s->vb_lock, flags);
 148         list_add_tail(&buf->list, &s->vb_capture);
 149         spin_unlock_irqrestore(&s->vb_lock, flags);
 150 }
 151
 152 static int cx18_buf_prepare(struct vb2_buffer *vb)
 153 {
 154         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 155         struct cx18_stream *s = vb2_get_drv_priv(vb->vb2_queue);
 156         struct cx18 *cx = s->cx;
 157         unsigned int size;
 158
 159         /*
 160          * HM12 YUV size is (Y=(h*720) + UV=(h*(720/2)))
 161          * UYUV YUV size is (Y=(h*720) + UV=(h*(720)))
 162          */
 163         if (s->pixelformat == V4L2_PIX_FMT_NV12_16L16)
 164                 size = cx->cxhdl.height * 720 * 3 / 2;
 165         else
 166                 size = cx->cxhdl.height * 720 * 2;
 167
 168         if (vb2_plane_size(vb, 0) < size)
 169                 return -EINVAL;
 170         vb2_set_plane_payload(vb, 0, size);
 171         vbuf->field = V4L2_FIELD_INTERLACED;
 172         return 0;
 173 }
 174
 175 void cx18_clear_queue(struct cx18_stream *s, enum vb2_buffer_state state)
 176 {
 177         while (!list_empty(&s->vb_capture)) {
 178                 struct cx18_vb2_buffer *buf;
 179
 180                 buf = list_first_entry(&s->vb_capture,
 181                                        struct cx18_vb2_buffer, list);
 182                 list_del(&buf->list);
 183                 vb2_buffer_done(&buf->vb.vb2_buf, state);
 184         }
 185 }
 186
 187 static int cx18_start_streaming(struct vb2_queue *vq, unsigned int count)
 188 {
 189         struct v4l2_fh *owner = vq->owner;
 190         struct cx18_stream *s = vb2_get_drv_priv(vq);
 191         unsigned long flags;
 192         int rc;
 193
 194         if (WARN_ON(!owner)) {
 195                 rc = -EIO;
 196                 goto clear_queue;
 197         }
 198
 199         s->sequence = 0;
 200         rc = cx18_start_capture(fh2id(owner));
 201         if (!rc) {
 202                 /* Establish a buffer timeout */
 203                 mod_timer(&s->vb_timeout, msecs_to_jiffies(2000) + jiffies);
 204                 return 0;
 205         }
 206
 207 clear_queue:
 208         spin_lock_irqsave(&s->vb_lock, flags);
 209         cx18_clear_queue(s, VB2_BUF_STATE_QUEUED);
 210         spin_unlock_irqrestore(&s->vb_lock, flags);
 211         return rc;
 212 }
 213
 214 static void cx18_stop_streaming(struct vb2_queue *vq)
 215 {
 216         struct cx18_stream *s = vb2_get_drv_priv(vq);
 217         unsigned long flags;
 218
 219         cx18_stop_capture(s, 0);
 220         timer_delete_sync(&s->vb_timeout);
 221         spin_lock_irqsave(&s->vb_lock, flags);
 222         cx18_clear_queue(s, VB2_BUF_STATE_ERROR);
 223         spin_unlock_irqrestore(&s->vb_lock, flags);
 224 }
 225
 226 static const struct vb2_ops cx18_vb2_qops = {
 227         .queue_setup            = cx18_queue_setup,
 228         .buf_queue              = cx18_buf_queue,
 229         .buf_prepare            = cx18_buf_prepare,
 230         .start_streaming        = cx18_start_streaming,
 231         .stop_streaming         = cx18_stop_streaming,
 232         .wait_prepare           = vb2_ops_wait_prepare,
 233         .wait_finish            = vb2_ops_wait_finish,
 234 };
 235
 236 static int cx18_stream_init(struct cx18 *cx, int type)
 237 {
 238         struct cx18_stream *s = &cx->streams[type];
 239         int err = 0;
 240
 241         memset(s, 0, sizeof(*s));
 242
 243         /* initialize cx18_stream fields */
 244         s->dvb = NULL;
 245         s->cx = cx;
 246         s->type = type;
 247         s->name = cx18_stream_info[type].name;
 248         s->handle = CX18_INVALID_TASK_HANDLE;
 249
 250         s->dma = cx18_stream_info[type].dma;
 251         s->v4l2_dev_caps = cx18_stream_info[type].caps;
 252         s->buffers = cx->stream_buffers[type];
 253         s->buf_size = cx->stream_buf_size[type];
 254         INIT_LIST_HEAD(&s->buf_pool);
 255         s->bufs_per_mdl = 1;
 256         s->mdl_size = s->buf_size * s->bufs_per_mdl;
 257
 258         init_waitqueue_head(&s->waitq);
 259         s->id = -1;
 260         spin_lock_init(&s->q_free.lock);
 261         cx18_queue_init(&s->q_free);
 262         spin_lock_init(&s->q_busy.lock);
 263         cx18_queue_init(&s->q_busy);
 264         spin_lock_init(&s->q_full.lock);
 265         cx18_queue_init(&s->q_full);
 266         spin_lock_init(&s->q_idle.lock);
 267         cx18_queue_init(&s->q_idle);
 268
 269         INIT_WORK(&s->out_work_order, cx18_out_work_handler);
 270
 271         INIT_LIST_HEAD(&s->vb_capture);
 272         timer_setup(&s->vb_timeout, cx18_vb_timeout, 0);
 273         spin_lock_init(&s->vb_lock);
 274
 275         if (type == CX18_ENC_STREAM_TYPE_YUV) {
 276                 s->vb_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 277
 278                 /* Assume the previous pixel default */
 279                 s->pixelformat = V4L2_PIX_FMT_NV12_16L16;
 280                 s->vb_bytes_per_frame = cx->cxhdl.height * 720 * 3 / 2;
 281                 s->vb_bytes_per_line = 720;
 282
 283                 s->vidq.io_modes = VB2_READ | VB2_MMAP | VB2_DMABUF;
 284                 s->vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 285                 s->vidq.drv_priv = s;
 286                 s->vidq.buf_struct_size = sizeof(struct cx18_vb2_buffer);
 287                 s->vidq.ops = &cx18_vb2_qops;
 288                 s->vidq.mem_ops = &vb2_vmalloc_memops;
 289                 s->vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 290                 s->vidq.min_queued_buffers = 2;
 291                 s->vidq.gfp_flags = GFP_DMA32;
 292                 s->vidq.dev = &cx->pci_dev->dev;
 293                 s->vidq.lock = &cx->serialize_lock;
 294
 295                 err = vb2_queue_init(&s->vidq);
 296                 if (err)
 297                         v4l2_err(&cx->v4l2_dev, "cannot init vb2 queue\n");
 298                 s->video_dev.queue = &s->vidq;
 299         }
 300         return err;
 301 }
 302
 303 static int cx18_prep_dev(struct cx18 *cx, int type)
 304 {
 305         struct cx18_stream *s = &cx->streams[type];
 306         u32 cap = cx->v4l2_cap;
 307         int num_offset = cx18_stream_info[type].num_offset;
 308         int num = cx->instance + cx18_first_minor + num_offset;
 309         int err;
 310
 311         /*
 312          * These five fields are always initialized.
 313          * For analog capture related streams, if video_dev.v4l2_dev == NULL then the
 314          * stream is not in use.
 315          * For the TS stream, if dvb == NULL then the stream is not in use.
 316          * In those cases no other fields but these four can be used.
 317          */
 318         s->video_dev.v4l2_dev = NULL;
 319         s->dvb = NULL;
 320         s->cx = cx;
 321         s->type = type;
 322         s->name = cx18_stream_info[type].name;
 323
 324         /* Check whether the radio is supported */
 325         if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
 326                 return 0;
 327
 328         /* Check whether VBI is supported */
 329         if (type == CX18_ENC_STREAM_TYPE_VBI &&
 330             !(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
 331                 return 0;
 332
 333         /* User explicitly selected 0 buffers for these streams, so don't
 334            create them. */
 335         if (cx18_stream_info[type].dma != DMA_NONE &&
 336             cx->stream_buffers[type] == 0) {
 337                 CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
 338                 return 0;
 339         }
 340
 341         err = cx18_stream_init(cx, type);
 342         if (err)
 343                 return err;
 344
 345         /* Allocate the cx18_dvb struct only for the TS on cards with DTV */
 346         if (type == CX18_ENC_STREAM_TYPE_TS) {
 347                 if (cx->card->hw_all & CX18_HW_DVB) {
 348                         s->dvb = kzalloc(sizeof(struct cx18_dvb), GFP_KERNEL);
 349                         if (s->dvb == NULL) {
 350                                 CX18_ERR("Couldn't allocate cx18_dvb structure for %s\n",
 351                                          s->name);
 352                                 return -ENOMEM;
 353                         }
 354                 } else {
 355                         /* Don't need buffers for the TS, if there is no DVB */
 356                         s->buffers = 0;
 357                 }
 358         }
 359
 360         if (num_offset == -1)
 361                 return 0;
 362
 363         /* initialize the v4l2 video device structure */
 364         snprintf(s->video_dev.name, sizeof(s->video_dev.name), "%s %s",
 365                  cx->v4l2_dev.name, s->name);
 366
 367         s->video_dev.num = num;
 368         s->video_dev.v4l2_dev = &cx->v4l2_dev;
 369         if (type == CX18_ENC_STREAM_TYPE_YUV)
 370                 s->video_dev.fops = &cx18_v4l2_enc_yuv_fops;
 371         else
 372                 s->video_dev.fops = &cx18_v4l2_enc_fops;
 373         s->video_dev.release = video_device_release_empty;
 374         if (cx->card->video_inputs->video_type == CX18_CARD_INPUT_VID_TUNER)
 375                 s->video_dev.tvnorms = cx->tuner_std;
 376         else
 377                 s->video_dev.tvnorms = V4L2_STD_ALL;
 378         s->video_dev.lock = &cx->serialize_lock;
 379         cx18_set_funcs(&s->video_dev);
 380         return 0;
 381 }
 382
 383 /* Initialize v4l2 variables and register v4l2 devices */
 384 int cx18_streams_setup(struct cx18 *cx)
 385 {
 386         int type, ret;
 387
 388         /* Setup V4L2 Devices */
 389         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 390                 /* Prepare device */
 391                 ret = cx18_prep_dev(cx, type);
 392                 if (ret < 0)
 393                         break;
 394
 395                 /* Allocate Stream */
 396                 ret = cx18_stream_alloc(&cx->streams[type]);
 397                 if (ret < 0)
 398                         break;
 399         }
 400         if (type == CX18_MAX_STREAMS)
 401                 return 0;
 402
 403         /* One or more streams could not be initialized. Clean 'em all up. */
 404         cx18_streams_cleanup(cx, 0);
 405         return ret;
 406 }
 407
 408 static int cx18_reg_dev(struct cx18 *cx, int type)
 409 {
 410         struct cx18_stream *s = &cx->streams[type];
 411         int vfl_type = cx18_stream_info[type].vfl_type;
 412         const char *name;
 413         int num, ret;
 414
 415         if (type == CX18_ENC_STREAM_TYPE_TS && s->dvb != NULL) {
 416                 ret = cx18_dvb_register(s);
 417                 if (ret < 0) {
 418                         CX18_ERR("DVB failed to register\n");
 419                         return ret;
 420                 }
 421         }
 422
 423         if (s->video_dev.v4l2_dev == NULL)
 424                 return 0;
 425
 426         num = s->video_dev.num;
 427         s->video_dev.device_caps = s->v4l2_dev_caps;    /* device capabilities */
 428         /* card number + user defined offset + device offset */
 429         if (type != CX18_ENC_STREAM_TYPE_MPG) {
 430                 struct cx18_stream *s_mpg = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
 431
 432                 if (s_mpg->video_dev.v4l2_dev)
 433                         num = s_mpg->video_dev.num
 434                             + cx18_stream_info[type].num_offset;
 435         }
 436         video_set_drvdata(&s->video_dev, s);
 437
 438         /* Register device. First try the desired minor, then any free one. */
 439         ret = video_register_device_no_warn(&s->video_dev, vfl_type, num);
 440         if (ret < 0) {
 441                 CX18_ERR("Couldn't register v4l2 device for %s (device node number %d)\n",
 442                         s->name, num);
 443                 s->video_dev.v4l2_dev = NULL;
 444                 return ret;
 445         }
 446
 447         name = video_device_node_name(&s->video_dev);
 448
 449         switch (vfl_type) {
 450         case VFL_TYPE_VIDEO:
 451                 CX18_INFO("Registered device %s for %s (%d x %d.%02d kB)\n",
 452                           name, s->name, cx->stream_buffers[type],
 453                           cx->stream_buf_size[type] / 1024,
 454                           (cx->stream_buf_size[type] * 100 / 1024) % 100);
 455                 break;
 456
 457         case VFL_TYPE_RADIO:
 458                 CX18_INFO("Registered device %s for %s\n", name, s->name);
 459                 break;
 460
 461         case VFL_TYPE_VBI:
 462                 if (cx->stream_buffers[type])
 463                         CX18_INFO("Registered device %s for %s (%d x %d bytes)\n",
 464                                   name, s->name, cx->stream_buffers[type],
 465                                   cx->stream_buf_size[type]);
 466                 else
 467                         CX18_INFO("Registered device %s for %s\n",
 468                                 name, s->name);
 469                 break;
 470         }
 471
 472         return 0;
 473 }
 474
 475 /* Register v4l2 devices */
 476 int cx18_streams_register(struct cx18 *cx)
 477 {
 478         int type;
 479         int err;
 480         int ret = 0;
 481
 482         /* Register V4L2 devices */
 483         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 484                 err = cx18_reg_dev(cx, type);
 485                 if (err && ret == 0)
 486                         ret = err;
 487         }
 488
 489         if (ret == 0)
 490                 return 0;
 491
 492         /* One or more streams could not be initialized. Clean 'em all up. */
 493         cx18_streams_cleanup(cx, 1);
 494         return ret;
 495 }
 496
 497 /* Unregister v4l2 devices */
 498 void cx18_streams_cleanup(struct cx18 *cx, int unregister)
 499 {
 500         struct video_device *vdev;
 501         int type;
 502
 503         /* Teardown all streams */
 504         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 505
 506                 /* The TS has a cx18_dvb structure, not a video_device */
 507                 if (type == CX18_ENC_STREAM_TYPE_TS) {
 508                         if (cx->streams[type].dvb != NULL) {
 509                                 if (unregister)
 510                                         cx18_dvb_unregister(&cx->streams[type]);
 511                                 kfree(cx->streams[type].dvb);
 512                                 cx->streams[type].dvb = NULL;
 513                                 cx18_stream_free(&cx->streams[type]);
 514                         }
 515                         continue;
 516                 }
 517
 518                 /* No struct video_device, but can have buffers allocated */
 519                 if (type == CX18_ENC_STREAM_TYPE_IDX) {
 520                         /* If the module params didn't inhibit IDX ... */
 521                         if (cx->stream_buffers[type] != 0) {
 522                                 cx->stream_buffers[type] = 0;
 523                                 /*
 524                                  * Before calling cx18_stream_free(),
 525                                  * check if the IDX stream was actually set up.
 526                                  * Needed, since the cx18_probe() error path
 527                                  * exits through here as well as normal clean up
 528                                  */
 529                                 if (cx->streams[type].buffers != 0)
 530                                         cx18_stream_free(&cx->streams[type]);
 531                         }
 532                         continue;
 533                 }
 534
 535                 /* If struct video_device exists, can have buffers allocated */
 536                 vdev = &cx->streams[type].video_dev;
 537
 538                 if (vdev->v4l2_dev == NULL)
 539                         continue;
 540
 541                 cx18_stream_free(&cx->streams[type]);
 542
 543                 if (type == CX18_ENC_STREAM_TYPE_YUV)
 544                         vb2_video_unregister_device(vdev);
 545                 else
 546                         video_unregister_device(vdev);
 547         }
 548 }
 549
 550 static void cx18_vbi_setup(struct cx18_stream *s)
 551 {
 552         struct cx18 *cx = s->cx;
 553         int raw = cx18_raw_vbi(cx);
 554         u32 data[CX2341X_MBOX_MAX_DATA];
 555         int lines;
 556
 557         if (cx->is_60hz) {
 558                 cx->vbi.count = 12;
 559                 cx->vbi.start[0] = 10;
 560                 cx->vbi.start[1] = 273;
 561         } else {        /* PAL/SECAM */
 562                 cx->vbi.count = 18;
 563                 cx->vbi.start[0] = 6;
 564                 cx->vbi.start[1] = 318;
 565         }
 566
 567         /* setup VBI registers */
 568         if (raw)
 569                 v4l2_subdev_call(cx->sd_av, vbi, s_raw_fmt, &cx->vbi.in.fmt.vbi);
 570         else
 571                 v4l2_subdev_call(cx->sd_av, vbi, s_sliced_fmt, &cx->vbi.in.fmt.sliced);
 572
 573         /*
 574          * Send the CX18_CPU_SET_RAW_VBI_PARAM API command to setup Encoder Raw
 575          * VBI when the first analog capture channel starts, as once it starts
 576          * (e.g. MPEG), we can't effect any change in the Encoder Raw VBI setup
 577          * (i.e. for the VBI capture channels).  We also send it for each
 578          * analog capture channel anyway just to make sure we get the proper
 579          * behavior
 580          */
 581         if (raw) {
 582                 lines = cx->vbi.count * 2;
 583         } else {
 584                 /*
 585                  * For 525/60 systems, according to the VIP 2 & BT.656 std:
 586                  * The EAV RP code's Field bit toggles on line 4, a few lines
 587                  * after the Vertcal Blank bit has already toggled.
 588                  * Tell the encoder to capture 21-4+1=18 lines per field,
 589                  * since we want lines 10 through 21.
 590                  *
 591                  * For 625/50 systems, according to the VIP 2 & BT.656 std:
 592                  * The EAV RP code's Field bit toggles on line 1, a few lines
 593                  * after the Vertcal Blank bit has already toggled.
 594                  * (We've actually set the digitizer so that the Field bit
 595                  * toggles on line 2.) Tell the encoder to capture 23-2+1=22
 596                  * lines per field, since we want lines 6 through 23.
 597                  */
 598                 lines = cx->is_60hz ? (21 - 4 + 1) * 2 : (23 - 2 + 1) * 2;
 599         }
 600
 601         data[0] = s->handle;
 602         /* Lines per field */
 603         data[1] = (lines / 2) | ((lines / 2) << 16);
 604         /* bytes per line */
 605         data[2] = (raw ? VBI_ACTIVE_SAMPLES
 606                        : (cx->is_60hz ? VBI_HBLANK_SAMPLES_60HZ
 607                                       : VBI_HBLANK_SAMPLES_50HZ));
 608         /* Every X number of frames a VBI interrupt arrives
 609            (frames as in 25 or 30 fps) */
 610         data[3] = 1;
 611         /*
 612          * Set the SAV/EAV RP codes to look for as start/stop points
 613          * when in VIP-1.1 mode
 614          */
 615         if (raw) {
 616                 /*
 617                  * Start codes for beginning of "active" line in vertical blank
 618                  * 0x20 (               VerticalBlank                )
 619                  * 0x60 (     EvenField VerticalBlank                )
 620                  */
 621                 data[4] = 0x20602060;
 622                 /*
 623                  * End codes for end of "active" raw lines and regular lines
 624                  * 0x30 (               VerticalBlank HorizontalBlank)
 625                  * 0x70 (     EvenField VerticalBlank HorizontalBlank)
 626                  * 0x90 (Task                         HorizontalBlank)
 627                  * 0xd0 (Task EvenField               HorizontalBlank)
 628                  */
 629                 data[5] = 0x307090d0;
 630         } else {
 631                 /*
 632                  * End codes for active video, we want data in the hblank region
 633                  * 0xb0 (Task         0 VerticalBlank HorizontalBlank)
 634                  * 0xf0 (Task EvenField VerticalBlank HorizontalBlank)
 635                  *
 636                  * Since the V bit is only allowed to toggle in the EAV RP code,
 637                  * just before the first active region line, these two
 638                  * are problematic:
 639                  * 0x90 (Task                         HorizontalBlank)
 640                  * 0xd0 (Task EvenField               HorizontalBlank)
 641                  *
 642                  * We have set the digitzer such that we don't have to worry
 643                  * about these problem codes.
 644                  */
 645                 data[4] = 0xB0F0B0F0;
 646                 /*
 647                  * Start codes for beginning of active line in vertical blank
 648                  * 0xa0 (Task           VerticalBlank                )
 649                  * 0xe0 (Task EvenField VerticalBlank                )
 650                  */
 651                 data[5] = 0xA0E0A0E0;
 652         }
 653
 654         CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
 655                         data[0], data[1], data[2], data[3], data[4], data[5]);
 656
 657         cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
 658 }
 659
 660 void cx18_stream_rotate_idx_mdls(struct cx18 *cx)
 661 {
 662         struct cx18_stream *s = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
 663         struct cx18_mdl *mdl;
 664
 665         if (!cx18_stream_enabled(s))
 666                 return;
 667
 668         /* Return if the firmware is not running low on MDLs */
 669         if ((atomic_read(&s->q_free.depth) + atomic_read(&s->q_busy.depth)) >=
 670                                             CX18_ENC_STREAM_TYPE_IDX_FW_MDL_MIN)
 671                 return;
 672
 673         /* Return if there are no MDLs to rotate back to the firmware */
 674         if (atomic_read(&s->q_full.depth) < 2)
 675                 return;
 676
 677         /*
 678          * Take the oldest IDX MDL still holding data, and discard its index
 679          * entries by scheduling the MDL to go back to the firmware
 680          */
 681         mdl = cx18_dequeue(s, &s->q_full);
 682         if (mdl != NULL)
 683                 cx18_enqueue(s, mdl, &s->q_free);
 684 }
 685
 686 static
 687 struct cx18_queue *_cx18_stream_put_mdl_fw(struct cx18_stream *s,
 688                                            struct cx18_mdl *mdl)
 689 {
 690         struct cx18 *cx = s->cx;
 691         struct cx18_queue *q;
 692
 693         /* Don't give it to the firmware, if we're not running a capture */
 694         if (s->handle == CX18_INVALID_TASK_HANDLE ||
 695             test_bit(CX18_F_S_STOPPING, &s->s_flags) ||
 696             !test_bit(CX18_F_S_STREAMING, &s->s_flags))
 697                 return cx18_enqueue(s, mdl, &s->q_free);
 698
 699         q = cx18_enqueue(s, mdl, &s->q_busy);
 700         if (q != &s->q_busy)
 701                 return q; /* The firmware has the max MDLs it can handle */
 702
 703         cx18_mdl_sync_for_device(s, mdl);
 704         cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
 705                   (void __iomem *) &cx->scb->cpu_mdl[mdl->id] - cx->enc_mem,
 706                   s->bufs_per_mdl, mdl->id, s->mdl_size);
 707         return q;
 708 }
 709
 710 static
 711 void _cx18_stream_load_fw_queue(struct cx18_stream *s)
 712 {
 713         struct cx18_queue *q;
 714         struct cx18_mdl *mdl;
 715
 716         if (atomic_read(&s->q_free.depth) == 0 ||
 717             atomic_read(&s->q_busy.depth) >= CX18_MAX_FW_MDLS_PER_STREAM)
 718                 return;
 719
 720         /* Move from q_free to q_busy notifying the firmware, until the limit */
 721         do {
 722                 mdl = cx18_dequeue(s, &s->q_free);
 723                 if (mdl == NULL)
 724                         break;
 725                 q = _cx18_stream_put_mdl_fw(s, mdl);
 726         } while (atomic_read(&s->q_busy.depth) < CX18_MAX_FW_MDLS_PER_STREAM
 727                  && q == &s->q_busy);
 728 }
 729
 730 void cx18_out_work_handler(struct work_struct *work)
 731 {
 732         struct cx18_stream *s =
 733                          container_of(work, struct cx18_stream, out_work_order);
 734
 735         _cx18_stream_load_fw_queue(s);
 736 }
 737
 738 static void cx18_stream_configure_mdls(struct cx18_stream *s)
 739 {
 740         cx18_unload_queues(s);
 741
 742         switch (s->type) {
 743         case CX18_ENC_STREAM_TYPE_YUV:
 744                 /*
 745                  * Height should be a multiple of 32 lines.
 746                  * Set the MDL size to the exact size needed for one frame.
 747                  * Use enough buffers per MDL to cover the MDL size
 748                  */
 749                 if (s->pixelformat == V4L2_PIX_FMT_NV12_16L16)
 750                         s->mdl_size = 720 * s->cx->cxhdl.height * 3 / 2;
 751                 else
 752                         s->mdl_size = 720 * s->cx->cxhdl.height * 2;
 753                 s->bufs_per_mdl = s->mdl_size / s->buf_size;
 754                 if (s->mdl_size % s->buf_size)
 755                         s->bufs_per_mdl++;
 756                 break;
 757         case CX18_ENC_STREAM_TYPE_VBI:
 758                 s->bufs_per_mdl = 1;
 759                 if  (cx18_raw_vbi(s->cx)) {
 760                         s->mdl_size = (s->cx->is_60hz ? 12 : 18)
 761                                                        * 2 * VBI_ACTIVE_SAMPLES;
 762                 } else {
 763                         /*
 764                          * See comment in cx18_vbi_setup() below about the
 765                          * extra lines we capture in sliced VBI mode due to
 766                          * the lines on which EAV RP codes toggle.
 767                         */
 768                         s->mdl_size = s->cx->is_60hz
 769                                    ? (21 - 4 + 1) * 2 * VBI_HBLANK_SAMPLES_60HZ
 770                                    : (23 - 2 + 1) * 2 * VBI_HBLANK_SAMPLES_50HZ;
 771                 }
 772                 break;
 773         default:
 774                 s->bufs_per_mdl = 1;
 775                 s->mdl_size = s->buf_size * s->bufs_per_mdl;
 776                 break;
 777         }
 778
 779         cx18_load_queues(s);
 780 }
 781
 782 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
 783 {
 784         u32 data[MAX_MB_ARGUMENTS];
 785         struct cx18 *cx = s->cx;
 786         int captype = 0;
 787         struct cx18_stream *s_idx;
 788
 789         if (!cx18_stream_enabled(s))
 790                 return -EINVAL;
 791
 792         CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
 793
 794         switch (s->type) {
 795         case CX18_ENC_STREAM_TYPE_MPG:
 796                 captype = CAPTURE_CHANNEL_TYPE_MPEG;
 797                 cx->mpg_data_received = cx->vbi_data_inserted = 0;
 798                 cx->dualwatch_jiffies = jiffies;
 799                 cx->dualwatch_stereo_mode = v4l2_ctrl_g_ctrl(cx->cxhdl.audio_mode);
 800                 cx->search_pack_header = 0;
 801                 break;
 802
 803         case CX18_ENC_STREAM_TYPE_IDX:
 804                 captype = CAPTURE_CHANNEL_TYPE_INDEX;
 805                 break;
 806         case CX18_ENC_STREAM_TYPE_TS:
 807                 captype = CAPTURE_CHANNEL_TYPE_TS;
 808                 break;
 809         case CX18_ENC_STREAM_TYPE_YUV:
 810                 captype = CAPTURE_CHANNEL_TYPE_YUV;
 811                 break;
 812         case CX18_ENC_STREAM_TYPE_PCM:
 813                 captype = CAPTURE_CHANNEL_TYPE_PCM;
 814                 break;
 815         case CX18_ENC_STREAM_TYPE_VBI:
 816 #ifdef CX18_ENCODER_PARSES_SLICED
 817                 captype = cx18_raw_vbi(cx) ?
 818                      CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
 819 #else
 820                 /*
 821                  * Currently we set things up so that Sliced VBI from the
 822                  * digitizer is handled as Raw VBI by the encoder
 823                  */
 824                 captype = CAPTURE_CHANNEL_TYPE_VBI;
 825 #endif
 826                 cx->vbi.frame = 0;
 827                 cx->vbi.inserted_frame = 0;
 828                 memset(cx->vbi.sliced_mpeg_size,
 829                         0, sizeof(cx->vbi.sliced_mpeg_size));
 830                 break;
 831         default:
 832                 return -EINVAL;
 833         }
 834
 835         /* Clear Streamoff flags in case left from last capture */
 836         clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
 837
 838         cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
 839         s->handle = data[0];
 840         cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
 841
 842         /*
 843          * For everything but CAPTURE_CHANNEL_TYPE_TS, play it safe and
 844          * set up all the parameters, as it is not obvious which parameters the
 845          * firmware shares across capture channel types and which it does not.
 846          *
 847          * Some of the cx18_vapi() calls below apply to only certain capture
 848          * channel types.  We're hoping there's no harm in calling most of them
 849          * anyway, as long as the values are all consistent.  Setting some
 850          * shared parameters will have no effect once an analog capture channel
 851          * has started streaming.
 852          */
 853         if (captype != CAPTURE_CHANNEL_TYPE_TS) {
 854                 cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
 855                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
 856                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
 857                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
 858
 859                 /*
 860                  * Audio related reset according to
 861                  * Documentation/driver-api/media/drivers/cx2341x-devel.rst
 862                  */
 863                 if (atomic_read(&cx->ana_capturing) == 0)
 864                         cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2,
 865                                   s->handle, 12);
 866
 867                 /*
 868                  * Number of lines for Field 1 & Field 2 according to
 869                  * Documentation/driver-api/media/drivers/cx2341x-devel.rst
 870                  * Field 1 is 312 for 625 line systems in BT.656
 871                  * Field 2 is 313 for 625 line systems in BT.656
 872                  */
 873                 cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
 874                           s->handle, 312, 313);
 875
 876                 if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
 877                         cx18_vbi_setup(s);
 878
 879                 /*
 880                  * Select to receive I, P, and B frame index entries, if the
 881                  * index stream is enabled.  Otherwise disable index entry
 882                  * generation.
 883                  */
 884                 s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
 885                 cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 2,
 886                                  s->handle, cx18_stream_enabled(s_idx) ? 7 : 0);
 887
 888                 /* Call out to the common CX2341x API setup for user controls */
 889                 cx->cxhdl.priv = s;
 890                 cx2341x_handler_setup(&cx->cxhdl);
 891
 892                 /*
 893                  * When starting a capture and we're set for radio,
 894                  * ensure the video is muted, despite the user control.
 895                  */
 896                 if (!cx->cxhdl.video_mute &&
 897                     test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
 898                         cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
 899                           (v4l2_ctrl_g_ctrl(cx->cxhdl.video_mute_yuv) << 8) | 1);
 900
 901                 /* Enable the Video Format Converter for UYVY 4:2:2 support,
 902                  * rather than the default HM12 Macroblovk 4:2:0 support.
 903                  */
 904                 if (captype == CAPTURE_CHANNEL_TYPE_YUV) {
 905                         if (s->pixelformat == V4L2_PIX_FMT_UYVY)
 906                                 cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2,
 907                                         s->handle, 1);
 908                         else
 909                                 /* If in doubt, default to HM12 */
 910                                 cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2,
 911                                         s->handle, 0);
 912                 }
 913         }
 914
 915         if (atomic_read(&cx->tot_capturing) == 0) {
 916                 cx2341x_handler_set_busy(&cx->cxhdl, 1);
 917                 clear_bit(CX18_F_I_EOS, &cx->i_flags);
 918                 cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
 919         }
 920
 921         cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
 922                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
 923                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
 924
 925         /* Init all the cpu_mdls for this stream */
 926         cx18_stream_configure_mdls(s);
 927         _cx18_stream_load_fw_queue(s);
 928
 929         /* begin_capture */
 930         if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
 931                 CX18_DEBUG_WARN("Error starting capture!\n");
 932                 /* Ensure we're really not capturing before releasing MDLs */
 933                 set_bit(CX18_F_S_STOPPING, &s->s_flags);
 934                 if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 935                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
 936                 else
 937                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 938                 clear_bit(CX18_F_S_STREAMING, &s->s_flags);
 939                 /* FIXME - CX18_F_S_STREAMOFF as well? */
 940                 cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 941                 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 942                 s->handle = CX18_INVALID_TASK_HANDLE;
 943                 clear_bit(CX18_F_S_STOPPING, &s->s_flags);
 944                 if (atomic_read(&cx->tot_capturing) == 0) {
 945                         set_bit(CX18_F_I_EOS, &cx->i_flags);
 946                         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
 947                 }
 948                 return -EINVAL;
 949         }
 950
 951         /* you're live! sit back and await interrupts :) */
 952         if (captype != CAPTURE_CHANNEL_TYPE_TS)
 953                 atomic_inc(&cx->ana_capturing);
 954         atomic_inc(&cx->tot_capturing);
 955         return 0;
 956 }
 957 EXPORT_SYMBOL(cx18_start_v4l2_encode_stream);
 958
 959 void cx18_stop_all_captures(struct cx18 *cx)
 960 {
 961         int i;
 962
 963         for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
 964                 struct cx18_stream *s = &cx->streams[i];
 965
 966                 if (!cx18_stream_enabled(s))
 967                         continue;
 968                 if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
 969                         cx18_stop_v4l2_encode_stream(s, 0);
 970         }
 971 }
 972
 973 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
 974 {
 975         struct cx18 *cx = s->cx;
 976
 977         if (!cx18_stream_enabled(s))
 978                 return -EINVAL;
 979
 980         /* This function assumes that you are allowed to stop the capture
 981            and that we are actually capturing */
 982
 983         CX18_DEBUG_INFO("Stop Capture\n");
 984
 985         if (atomic_read(&cx->tot_capturing) == 0)
 986                 return 0;
 987
 988         set_bit(CX18_F_S_STOPPING, &s->s_flags);
 989         if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 990                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
 991         else
 992                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 993
 994         if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
 995                 CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
 996         }
 997
 998         if (s->type != CX18_ENC_STREAM_TYPE_TS)
 999                 atomic_dec(&cx->ana_capturing);
1000         atomic_dec(&cx->tot_capturing);
1001
1002         /* Clear capture and no-read bits */
1003         clear_bit(CX18_F_S_STREAMING, &s->s_flags);
1004
1005         /* Tell the CX23418 it can't use our buffers anymore */
1006         cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
1007
1008         cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
1009         s->handle = CX18_INVALID_TASK_HANDLE;
1010         clear_bit(CX18_F_S_STOPPING, &s->s_flags);
1011
1012         if (atomic_read(&cx->tot_capturing) > 0)
1013                 return 0;
1014
1015         cx2341x_handler_set_busy(&cx->cxhdl, 0);
1016         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
1017         wake_up(&s->waitq);
1018
1019         return 0;
1020 }
1021 EXPORT_SYMBOL(cx18_stop_v4l2_encode_stream);
1022
1023 u32 cx18_find_handle(struct cx18 *cx)
1024 {
1025         int i;
1026
1027         /* find first available handle to be used for global settings */
1028         for (i = 0; i < CX18_MAX_STREAMS; i++) {
1029                 struct cx18_stream *s = &cx->streams[i];
1030
1031                 if (s->video_dev.v4l2_dev && (s->handle != CX18_INVALID_TASK_HANDLE))
1032                         return s->handle;
1033         }
1034         return CX18_INVALID_TASK_HANDLE;
1035 }
1036
1037 struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle)
1038 {
1039         int i;
1040         struct cx18_stream *s;
1041
1042         if (handle == CX18_INVALID_TASK_HANDLE)
1043                 return NULL;
1044
1045         for (i = 0; i < CX18_MAX_STREAMS; i++) {
1046                 s = &cx->streams[i];
1047                 if (s->handle != handle)
1048                         continue;
1049                 if (cx18_stream_enabled(s))
1050                         return s;
1051         }
1052         return NULL;
1053 }