SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/media/video/cx18/cx18-streams.c

   1 /*
   2  *  cx18 init/start/stop/exit stream functions
   3  *
   4  *  Derived from ivtv-streams.c
   5  *
   6  *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
   7  *  Copyright (C) 2008  Andy Walls <awalls@radix.net>
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  22  *  02111-1307  USA
  23  */
  24
  25 #include "cx18-driver.h"
  26 #include "cx18-io.h"
  27 #include "cx18-fileops.h"
  28 #include "cx18-mailbox.h"
  29 #include "cx18-i2c.h"
  30 #include "cx18-queue.h"
  31 #include "cx18-ioctl.h"
  32 #include "cx18-streams.h"
  33 #include "cx18-cards.h"
  34 #include "cx18-scb.h"
  35 #include "cx18-av-core.h"
  36 #include "cx18-dvb.h"
  37
  38 #define CX18_DSP0_INTERRUPT_MASK        0xd0004C
  39
  40 static struct file_operations cx18_v4l2_enc_fops = {
  41         .owner = THIS_MODULE,
  42         .read = cx18_v4l2_read,
  43         .open = cx18_v4l2_open,
  44         /* FIXME change to video_ioctl2 if serialization lock can be removed */
  45         .ioctl = cx18_v4l2_ioctl,
  46         .compat_ioctl = v4l_compat_ioctl32,
  47         .release = cx18_v4l2_close,
  48         .poll = cx18_v4l2_enc_poll,
  49 };
  50
  51 /* offset from 0 to register ts v4l2 minors on */
  52 #define CX18_V4L2_ENC_TS_OFFSET   16
  53 /* offset from 0 to register pcm v4l2 minors on */
  54 #define CX18_V4L2_ENC_PCM_OFFSET  24
  55 /* offset from 0 to register yuv v4l2 minors on */
  56 #define CX18_V4L2_ENC_YUV_OFFSET  32
  57
  58 static struct {
  59         const char *name;
  60         int vfl_type;
  61         int num_offset;
  62         int dma;
  63         enum v4l2_buf_type buf_type;
  64         struct file_operations *fops;
  65 } cx18_stream_info[] = {
  66         {       /* CX18_ENC_STREAM_TYPE_MPG */
  67                 "encoder MPEG",
  68                 VFL_TYPE_GRABBER, 0,
  69                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
  70                 &cx18_v4l2_enc_fops
  71         },
  72         {       /* CX18_ENC_STREAM_TYPE_TS */
  73                 "TS",
  74                 VFL_TYPE_GRABBER, -1,
  75                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
  76                 &cx18_v4l2_enc_fops
  77         },
  78         {       /* CX18_ENC_STREAM_TYPE_YUV */
  79                 "encoder YUV",
  80                 VFL_TYPE_GRABBER, CX18_V4L2_ENC_YUV_OFFSET,
  81                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
  82                 &cx18_v4l2_enc_fops
  83         },
  84         {       /* CX18_ENC_STREAM_TYPE_VBI */
  85                 "encoder VBI",
  86                 VFL_TYPE_VBI, 0,
  87                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VBI_CAPTURE,
  88                 &cx18_v4l2_enc_fops
  89         },
  90         {       /* CX18_ENC_STREAM_TYPE_PCM */
  91                 "encoder PCM audio",
  92                 VFL_TYPE_GRABBER, CX18_V4L2_ENC_PCM_OFFSET,
  93                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_PRIVATE,
  94                 &cx18_v4l2_enc_fops
  95         },
  96         {       /* CX18_ENC_STREAM_TYPE_IDX */
  97                 "encoder IDX",
  98                 VFL_TYPE_GRABBER, -1,
  99                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
 100                 &cx18_v4l2_enc_fops
 101         },
 102         {       /* CX18_ENC_STREAM_TYPE_RAD */
 103                 "encoder radio",
 104                 VFL_TYPE_RADIO, 0,
 105                 PCI_DMA_NONE, V4L2_BUF_TYPE_PRIVATE,
 106                 &cx18_v4l2_enc_fops
 107         },
 108 };
 109
 110 static void cx18_stream_init(struct cx18 *cx, int type)
 111 {
 112         struct cx18_stream *s = &cx->streams[type];
 113         struct video_device *dev = s->v4l2dev;
 114         u32 max_size = cx->options.megabytes[type] * 1024 * 1024;
 115
 116         /* we need to keep v4l2dev, so restore it afterwards */
 117         memset(s, 0, sizeof(*s));
 118         s->v4l2dev = dev;
 119
 120         /* initialize cx18_stream fields */
 121         s->cx = cx;
 122         s->type = type;
 123         s->name = cx18_stream_info[type].name;
 124         s->handle = CX18_INVALID_TASK_HANDLE;
 125
 126         s->dma = cx18_stream_info[type].dma;
 127         s->buf_size = cx->stream_buf_size[type];
 128         if (s->buf_size)
 129                 s->buffers = max_size / s->buf_size;
 130         if (s->buffers > 63) {
 131                 /* Each stream has a maximum of 63 buffers,
 132                    ensure we do not exceed that. */
 133                 s->buffers = 63;
 134                 s->buf_size = (max_size / s->buffers) & ~0xfff;
 135         }
 136         mutex_init(&s->qlock);
 137         init_waitqueue_head(&s->waitq);
 138         s->id = -1;
 139         cx18_queue_init(&s->q_free);
 140         cx18_queue_init(&s->q_full);
 141 }
 142
 143 static int cx18_prep_dev(struct cx18 *cx, int type)
 144 {
 145         struct cx18_stream *s = &cx->streams[type];
 146         u32 cap = cx->v4l2_cap;
 147         int num_offset = cx18_stream_info[type].num_offset;
 148         int num = cx->num + cx18_first_minor + num_offset;
 149
 150         /* These four fields are always initialized. If v4l2dev == NULL, then
 151            this stream is not in use. In that case no other fields but these
 152            four can be used. */
 153         s->v4l2dev = NULL;
 154         s->cx = cx;
 155         s->type = type;
 156         s->name = cx18_stream_info[type].name;
 157
 158         /* Check whether the radio is supported */
 159         if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
 160                 return 0;
 161
 162         /* Check whether VBI is supported */
 163         if (type == CX18_ENC_STREAM_TYPE_VBI &&
 164             !(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
 165                 return 0;
 166
 167         /* User explicitly selected 0 buffers for these streams, so don't
 168            create them. */
 169         if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
 170             cx->options.megabytes[type] == 0) {
 171                 CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
 172                 return 0;
 173         }
 174
 175         cx18_stream_init(cx, type);
 176
 177         if (num_offset == -1)
 178                 return 0;
 179
 180         /* allocate and initialize the v4l2 video device structure */
 181         s->v4l2dev = video_device_alloc();
 182         if (s->v4l2dev == NULL) {
 183                 CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
 184                                 s->name);
 185                 return -ENOMEM;
 186         }
 187
 188         snprintf(s->v4l2dev->name, sizeof(s->v4l2dev->name), "cx18-%d",
 189                         cx->num);
 190
 191         s->v4l2dev->num = num;
 192         s->v4l2dev->parent = &cx->dev->dev;
 193         s->v4l2dev->fops = cx18_stream_info[type].fops;
 194         s->v4l2dev->release = video_device_release;
 195         s->v4l2dev->tvnorms = V4L2_STD_ALL;
 196         cx18_set_funcs(s->v4l2dev);
 197         return 0;
 198 }
 199
 200 /* Initialize v4l2 variables and register v4l2 devices */
 201 int cx18_streams_setup(struct cx18 *cx)
 202 {
 203         int type, ret;
 204
 205         /* Setup V4L2 Devices */
 206         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 207                 /* Prepare device */
 208                 ret = cx18_prep_dev(cx, type);
 209                 if (ret < 0)
 210                         break;
 211
 212                 /* Allocate Stream */
 213                 ret = cx18_stream_alloc(&cx->streams[type]);
 214                 if (ret < 0)
 215                         break;
 216         }
 217         if (type == CX18_MAX_STREAMS)
 218                 return 0;
 219
 220         /* One or more streams could not be initialized. Clean 'em all up. */
 221         cx18_streams_cleanup(cx, 0);
 222         return ret;
 223 }
 224
 225 static int cx18_reg_dev(struct cx18 *cx, int type)
 226 {
 227         struct cx18_stream *s = &cx->streams[type];
 228         int vfl_type = cx18_stream_info[type].vfl_type;
 229         int num, ret;
 230
 231         /* TODO: Shouldn't this be a VFL_TYPE_TRANSPORT or something?
 232          * We need a VFL_TYPE_TS defined.
 233          */
 234         if (strcmp("TS", s->name) == 0) {
 235                 /* just return if no DVB is supported */
 236                 if ((cx->card->hw_all & CX18_HW_DVB) == 0)
 237                         return 0;
 238                 ret = cx18_dvb_register(s);
 239                 if (ret < 0) {
 240                         CX18_ERR("DVB failed to register\n");
 241                         return ret;
 242                 }
 243         }
 244
 245         if (s->v4l2dev == NULL)
 246                 return 0;
 247
 248         num = s->v4l2dev->num;
 249         /* card number + user defined offset + device offset */
 250         if (type != CX18_ENC_STREAM_TYPE_MPG) {
 251                 struct cx18_stream *s_mpg = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
 252
 253                 if (s_mpg->v4l2dev)
 254                         num = s_mpg->v4l2dev->num + cx18_stream_info[type].num_offset;
 255         }
 256
 257         /* Register device. First try the desired minor, then any free one. */
 258         ret = video_register_device(s->v4l2dev, vfl_type, num);
 259         if (ret < 0) {
 260                 CX18_ERR("Couldn't register v4l2 device for %s kernel number %d\n",
 261                         s->name, num);
 262                 video_device_release(s->v4l2dev);
 263                 s->v4l2dev = NULL;
 264                 return ret;
 265         }
 266         num = s->v4l2dev->num;
 267
 268         switch (vfl_type) {
 269         case VFL_TYPE_GRABBER:
 270                 CX18_INFO("Registered device video%d for %s (%d MB)\n",
 271                         num, s->name, cx->options.megabytes[type]);
 272                 break;
 273
 274         case VFL_TYPE_RADIO:
 275                 CX18_INFO("Registered device radio%d for %s\n",
 276                         num, s->name);
 277                 break;
 278
 279         case VFL_TYPE_VBI:
 280                 if (cx->options.megabytes[type])
 281                         CX18_INFO("Registered device vbi%d for %s (%d MB)\n",
 282                                 num,
 283                                 s->name, cx->options.megabytes[type]);
 284                 else
 285                         CX18_INFO("Registered device vbi%d for %s\n",
 286                                 num, s->name);
 287                 break;
 288         }
 289
 290         return 0;
 291 }
 292
 293 /* Register v4l2 devices */
 294 int cx18_streams_register(struct cx18 *cx)
 295 {
 296         int type;
 297         int err;
 298         int ret = 0;
 299
 300         /* Register V4L2 devices */
 301         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 302                 err = cx18_reg_dev(cx, type);
 303                 if (err && ret == 0)
 304                         ret = err;
 305         }
 306
 307         if (ret == 0)
 308                 return 0;
 309
 310         /* One or more streams could not be initialized. Clean 'em all up. */
 311         cx18_streams_cleanup(cx, 1);
 312         return ret;
 313 }
 314
 315 /* Unregister v4l2 devices */
 316 void cx18_streams_cleanup(struct cx18 *cx, int unregister)
 317 {
 318         struct video_device *vdev;
 319         int type;
 320
 321         /* Teardown all streams */
 322         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 323                 if (cx->streams[type].dvb.enabled) {
 324                         cx18_dvb_unregister(&cx->streams[type]);
 325                         cx->streams[type].dvb.enabled = false;
 326                 }
 327
 328                 vdev = cx->streams[type].v4l2dev;
 329
 330                 cx->streams[type].v4l2dev = NULL;
 331                 if (vdev == NULL)
 332                         continue;
 333
 334                 cx18_stream_free(&cx->streams[type]);
 335
 336                 /* Unregister or release device */
 337                 if (unregister)
 338                         video_unregister_device(vdev);
 339                 else
 340                         video_device_release(vdev);
 341         }
 342 }
 343
 344 static void cx18_vbi_setup(struct cx18_stream *s)
 345 {
 346         struct cx18 *cx = s->cx;
 347         int raw = cx->vbi.sliced_in->service_set == 0;
 348         u32 data[CX2341X_MBOX_MAX_DATA];
 349         int lines;
 350
 351         if (cx->is_60hz) {
 352                 cx->vbi.count = 12;
 353                 cx->vbi.start[0] = 10;
 354                 cx->vbi.start[1] = 273;
 355         } else {        /* PAL/SECAM */
 356                 cx->vbi.count = 18;
 357                 cx->vbi.start[0] = 6;
 358                 cx->vbi.start[1] = 318;
 359         }
 360
 361         /* setup VBI registers */
 362         cx18_av_cmd(cx, VIDIOC_S_FMT, &cx->vbi.in);
 363
 364         /* determine number of lines and total number of VBI bytes.
 365            A raw line takes 1443 bytes: 2 * 720 + 4 byte frame header - 1
 366            The '- 1' byte is probably an unused U or V byte. Or something...
 367            A sliced line takes 51 bytes: 4 byte frame header, 4 byte internal
 368            header, 42 data bytes + checksum (to be confirmed) */
 369         if (raw) {
 370                 lines = cx->vbi.count * 2;
 371         } else {
 372                 lines = cx->is_60hz ? 24 : 38;
 373                 if (cx->is_60hz)
 374                         lines += 2;
 375         }
 376
 377         cx->vbi.enc_size = lines *
 378                 (raw ? cx->vbi.raw_size : cx->vbi.sliced_size);
 379
 380         data[0] = s->handle;
 381         /* Lines per field */
 382         data[1] = (lines / 2) | ((lines / 2) << 16);
 383         /* bytes per line */
 384         data[2] = (raw ? cx->vbi.raw_size : cx->vbi.sliced_size);
 385         /* Every X number of frames a VBI interrupt arrives
 386            (frames as in 25 or 30 fps) */
 387         data[3] = 1;
 388         /* Setup VBI for the cx25840 digitizer */
 389         if (raw) {
 390                 data[4] = 0x20602060;
 391                 data[5] = 0x30703070;
 392         } else {
 393                 data[4] = 0xB0F0B0F0;
 394                 data[5] = 0xA0E0A0E0;
 395         }
 396
 397         CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
 398                         data[0], data[1], data[2], data[3], data[4], data[5]);
 399
 400         if (s->type == CX18_ENC_STREAM_TYPE_VBI)
 401                 cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
 402 }
 403
 404 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
 405 {
 406         u32 data[MAX_MB_ARGUMENTS];
 407         struct cx18 *cx = s->cx;
 408         struct list_head *p;
 409         int ts = 0;
 410         int captype = 0;
 411
 412         if (s->v4l2dev == NULL && s->dvb.enabled == 0)
 413                 return -EINVAL;
 414
 415         CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
 416
 417         switch (s->type) {
 418         case CX18_ENC_STREAM_TYPE_MPG:
 419                 captype = CAPTURE_CHANNEL_TYPE_MPEG;
 420                 cx->mpg_data_received = cx->vbi_data_inserted = 0;
 421                 cx->dualwatch_jiffies = jiffies;
 422                 cx->dualwatch_stereo_mode = cx->params.audio_properties & 0x300;
 423                 cx->search_pack_header = 0;
 424                 break;
 425
 426         case CX18_ENC_STREAM_TYPE_TS:
 427                 captype = CAPTURE_CHANNEL_TYPE_TS;
 428                 ts = 1;
 429                 break;
 430         case CX18_ENC_STREAM_TYPE_YUV:
 431                 captype = CAPTURE_CHANNEL_TYPE_YUV;
 432                 break;
 433         case CX18_ENC_STREAM_TYPE_PCM:
 434                 captype = CAPTURE_CHANNEL_TYPE_PCM;
 435                 break;
 436         case CX18_ENC_STREAM_TYPE_VBI:
 437                 captype = cx->vbi.sliced_in->service_set ?
 438                     CAPTURE_CHANNEL_TYPE_SLICED_VBI : CAPTURE_CHANNEL_TYPE_VBI;
 439                 cx->vbi.frame = 0;
 440                 cx->vbi.inserted_frame = 0;
 441                 memset(cx->vbi.sliced_mpeg_size,
 442                         0, sizeof(cx->vbi.sliced_mpeg_size));
 443                 break;
 444         default:
 445                 return -EINVAL;
 446         }
 447
 448         /* mute/unmute video */
 449         cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2,
 450                   s->handle, !!test_bit(CX18_F_I_RADIO_USER, &cx->i_flags));
 451
 452         /* Clear Streamoff flags in case left from last capture */
 453         clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
 454
 455         cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
 456         s->handle = data[0];
 457         cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
 458
 459         if (atomic_read(&cx->ana_capturing) == 0 && !ts) {
 460                 /* Stuff from Windows, we don't know what it is */
 461                 cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
 462                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
 463                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
 464                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
 465                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2, s->handle, 12);
 466
 467                 cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
 468                                s->handle, cx->digitizer, cx->digitizer);
 469
 470                 /* Setup VBI */
 471                 if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
 472                         cx18_vbi_setup(s);
 473
 474                 /* assign program index info.
 475                    Mask 7: select I/P/B, Num_req: 400 max */
 476                 cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 1, 0);
 477
 478                 /* Setup API for Stream */
 479                 cx2341x_update(cx, cx18_api_func, NULL, &cx->params);
 480         }
 481
 482         if (atomic_read(&cx->tot_capturing) == 0) {
 483                 clear_bit(CX18_F_I_EOS, &cx->i_flags);
 484                 cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
 485         }
 486
 487         cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
 488                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
 489                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
 490
 491         list_for_each(p, &s->q_free.list) {
 492                 struct cx18_buffer *buf = list_entry(p, struct cx18_buffer, list);
 493
 494                 cx18_writel(cx, buf->dma_handle,
 495                                         &cx->scb->cpu_mdl[buf->id].paddr);
 496                 cx18_writel(cx, s->buf_size, &cx->scb->cpu_mdl[buf->id].length);
 497                 cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
 498                         (void __iomem *)&cx->scb->cpu_mdl[buf->id] - cx->enc_mem,
 499                         1, buf->id, s->buf_size);
 500         }
 501         /* begin_capture */
 502         if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
 503                 CX18_DEBUG_WARN("Error starting capture!\n");
 504                 /* Ensure we're really not capturing before releasing MDLs */
 505                 if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 506                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
 507                 else
 508                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 509                 cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 510                 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 511                 /* FIXME - clean-up DSP0_INT mask, i_flags, s_flags, etc. */
 512                 return -EINVAL;
 513         }
 514
 515         /* you're live! sit back and await interrupts :) */
 516         if (!ts)
 517                 atomic_inc(&cx->ana_capturing);
 518         atomic_inc(&cx->tot_capturing);
 519         return 0;
 520 }
 521
 522 void cx18_stop_all_captures(struct cx18 *cx)
 523 {
 524         int i;
 525
 526         for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
 527                 struct cx18_stream *s = &cx->streams[i];
 528
 529                 if (s->v4l2dev == NULL && s->dvb.enabled == 0)
 530                         continue;
 531                 if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
 532                         cx18_stop_v4l2_encode_stream(s, 0);
 533         }
 534 }
 535
 536 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
 537 {
 538         struct cx18 *cx = s->cx;
 539         unsigned long then;
 540
 541         if (s->v4l2dev == NULL && s->dvb.enabled == 0)
 542                 return -EINVAL;
 543
 544         /* This function assumes that you are allowed to stop the capture
 545            and that we are actually capturing */
 546
 547         CX18_DEBUG_INFO("Stop Capture\n");
 548
 549         if (atomic_read(&cx->tot_capturing) == 0)
 550                 return 0;
 551
 552         if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 553                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
 554         else
 555                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 556
 557         then = jiffies;
 558
 559         if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
 560                 CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
 561         }
 562
 563         if (s->type != CX18_ENC_STREAM_TYPE_TS)
 564                 atomic_dec(&cx->ana_capturing);
 565         atomic_dec(&cx->tot_capturing);
 566
 567         /* Clear capture and no-read bits */
 568         clear_bit(CX18_F_S_STREAMING, &s->s_flags);
 569
 570         /* Tell the CX23418 it can't use our buffers anymore */
 571         cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 572
 573         cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 574         s->handle = CX18_INVALID_TASK_HANDLE;
 575
 576         if (atomic_read(&cx->tot_capturing) > 0)
 577                 return 0;
 578
 579         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
 580         wake_up(&s->waitq);
 581
 582         return 0;
 583 }
 584
 585 u32 cx18_find_handle(struct cx18 *cx)
 586 {
 587         int i;
 588
 589         /* find first available handle to be used for global settings */
 590         for (i = 0; i < CX18_MAX_STREAMS; i++) {
 591                 struct cx18_stream *s = &cx->streams[i];
 592
 593                 if (s->v4l2dev && (s->handle != CX18_INVALID_TASK_HANDLE))
 594                         return s->handle;
 595         }
 596         return CX18_INVALID_TASK_HANDLE;
 597 }
 598
 599 struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle)
 600 {
 601         int i;
 602         struct cx18_stream *s;
 603
 604         if (handle == CX18_INVALID_TASK_HANDLE)
 605                 return NULL;
 606
 607         for (i = 0; i < CX18_MAX_STREAMS; i++) {
 608                 s = &cx->streams[i];
 609                 if (s->handle != handle)
 610                         continue;
 611                 if (s->v4l2dev || s->dvb.enabled)
 612                         return s;
 613         }
 614         return NULL;
 615 }