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-dvb.h"
  36
  37 #define CX18_DSP0_INTERRUPT_MASK        0xd0004C
  38
  39 static struct v4l2_file_operations cx18_v4l2_enc_fops = {
  40         .owner = THIS_MODULE,
  41         .read = cx18_v4l2_read,
  42         .open = cx18_v4l2_open,
  43         /* FIXME change to video_ioctl2 if serialization lock can be removed */
  44         .ioctl = cx18_v4l2_ioctl,
  45         .release = cx18_v4l2_close,
  46         .poll = cx18_v4l2_enc_poll,
  47 };
  48
  49 /* offset from 0 to register ts v4l2 minors on */
  50 #define CX18_V4L2_ENC_TS_OFFSET   16
  51 /* offset from 0 to register pcm v4l2 minors on */
  52 #define CX18_V4L2_ENC_PCM_OFFSET  24
  53 /* offset from 0 to register yuv v4l2 minors on */
  54 #define CX18_V4L2_ENC_YUV_OFFSET  32
  55
  56 static struct {
  57         const char *name;
  58         int vfl_type;
  59         int num_offset;
  60         int dma;
  61         enum v4l2_buf_type buf_type;
  62 } cx18_stream_info[] = {
  63         {       /* CX18_ENC_STREAM_TYPE_MPG */
  64                 "encoder MPEG",
  65                 VFL_TYPE_GRABBER, 0,
  66                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
  67         },
  68         {       /* CX18_ENC_STREAM_TYPE_TS */
  69                 "TS",
  70                 VFL_TYPE_GRABBER, -1,
  71                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
  72         },
  73         {       /* CX18_ENC_STREAM_TYPE_YUV */
  74                 "encoder YUV",
  75                 VFL_TYPE_GRABBER, CX18_V4L2_ENC_YUV_OFFSET,
  76                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
  77         },
  78         {       /* CX18_ENC_STREAM_TYPE_VBI */
  79                 "encoder VBI",
  80                 VFL_TYPE_VBI, 0,
  81                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VBI_CAPTURE,
  82         },
  83         {       /* CX18_ENC_STREAM_TYPE_PCM */
  84                 "encoder PCM audio",
  85                 VFL_TYPE_GRABBER, CX18_V4L2_ENC_PCM_OFFSET,
  86                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_PRIVATE,
  87         },
  88         {       /* CX18_ENC_STREAM_TYPE_IDX */
  89                 "encoder IDX",
  90                 VFL_TYPE_GRABBER, -1,
  91                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
  92         },
  93         {       /* CX18_ENC_STREAM_TYPE_RAD */
  94                 "encoder radio",
  95                 VFL_TYPE_RADIO, 0,
  96                 PCI_DMA_NONE, V4L2_BUF_TYPE_PRIVATE,
  97         },
  98 };
  99
 100 static void cx18_stream_init(struct cx18 *cx, int type)
 101 {
 102         struct cx18_stream *s = &cx->streams[type];
 103         struct video_device *video_dev = s->video_dev;
 104
 105         /* we need to keep video_dev, so restore it afterwards */
 106         memset(s, 0, sizeof(*s));
 107         s->video_dev = video_dev;
 108
 109         /* initialize cx18_stream fields */
 110         s->cx = cx;
 111         s->type = type;
 112         s->name = cx18_stream_info[type].name;
 113         s->handle = CX18_INVALID_TASK_HANDLE;
 114
 115         s->dma = cx18_stream_info[type].dma;
 116         s->buffers = cx->stream_buffers[type];
 117         s->buf_size = cx->stream_buf_size[type];
 118
 119         mutex_init(&s->qlock);
 120         init_waitqueue_head(&s->waitq);
 121         s->id = -1;
 122         cx18_queue_init(&s->q_free);
 123         cx18_queue_init(&s->q_busy);
 124         cx18_queue_init(&s->q_full);
 125 }
 126
 127 static int cx18_prep_dev(struct cx18 *cx, int type)
 128 {
 129         struct cx18_stream *s = &cx->streams[type];
 130         u32 cap = cx->v4l2_cap;
 131         int num_offset = cx18_stream_info[type].num_offset;
 132         int num = cx->instance + cx18_first_minor + num_offset;
 133
 134         /* These four fields are always initialized. If video_dev == NULL, then
 135            this stream is not in use. In that case no other fields but these
 136            four can be used. */
 137         s->video_dev = NULL;
 138         s->cx = cx;
 139         s->type = type;
 140         s->name = cx18_stream_info[type].name;
 141
 142         /* Check whether the radio is supported */
 143         if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
 144                 return 0;
 145
 146         /* Check whether VBI is supported */
 147         if (type == CX18_ENC_STREAM_TYPE_VBI &&
 148             !(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
 149                 return 0;
 150
 151         /* User explicitly selected 0 buffers for these streams, so don't
 152            create them. */
 153         if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
 154             cx->stream_buffers[type] == 0) {
 155                 CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
 156                 return 0;
 157         }
 158
 159         cx18_stream_init(cx, type);
 160
 161         if (num_offset == -1)
 162                 return 0;
 163
 164         /* allocate and initialize the v4l2 video device structure */
 165         s->video_dev = video_device_alloc();
 166         if (s->video_dev == NULL) {
 167                 CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
 168                                 s->name);
 169                 return -ENOMEM;
 170         }
 171
 172         snprintf(s->video_dev->name, sizeof(s->video_dev->name), "%s %s",
 173                  cx->v4l2_dev.name, s->name);
 174
 175         s->video_dev->num = num;
 176         s->video_dev->v4l2_dev = &cx->v4l2_dev;
 177         s->video_dev->fops = &cx18_v4l2_enc_fops;
 178         s->video_dev->release = video_device_release;
 179         s->video_dev->tvnorms = V4L2_STD_ALL;
 180         cx18_set_funcs(s->video_dev);
 181         return 0;
 182 }
 183
 184 /* Initialize v4l2 variables and register v4l2 devices */
 185 int cx18_streams_setup(struct cx18 *cx)
 186 {
 187         int type, ret;
 188
 189         /* Setup V4L2 Devices */
 190         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 191                 /* Prepare device */
 192                 ret = cx18_prep_dev(cx, type);
 193                 if (ret < 0)
 194                         break;
 195
 196                 /* Allocate Stream */
 197                 ret = cx18_stream_alloc(&cx->streams[type]);
 198                 if (ret < 0)
 199                         break;
 200         }
 201         if (type == CX18_MAX_STREAMS)
 202                 return 0;
 203
 204         /* One or more streams could not be initialized. Clean 'em all up. */
 205         cx18_streams_cleanup(cx, 0);
 206         return ret;
 207 }
 208
 209 static int cx18_reg_dev(struct cx18 *cx, int type)
 210 {
 211         struct cx18_stream *s = &cx->streams[type];
 212         int vfl_type = cx18_stream_info[type].vfl_type;
 213         int num, ret;
 214
 215         /* TODO: Shouldn't this be a VFL_TYPE_TRANSPORT or something?
 216          * We need a VFL_TYPE_TS defined.
 217          */
 218         if (strcmp("TS", s->name) == 0) {
 219                 /* just return if no DVB is supported */
 220                 if ((cx->card->hw_all & CX18_HW_DVB) == 0)
 221                         return 0;
 222                 ret = cx18_dvb_register(s);
 223                 if (ret < 0) {
 224                         CX18_ERR("DVB failed to register\n");
 225                         return ret;
 226                 }
 227         }
 228
 229         if (s->video_dev == NULL)
 230                 return 0;
 231
 232         num = s->video_dev->num;
 233         /* card number + user defined offset + device offset */
 234         if (type != CX18_ENC_STREAM_TYPE_MPG) {
 235                 struct cx18_stream *s_mpg = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
 236
 237                 if (s_mpg->video_dev)
 238                         num = s_mpg->video_dev->num
 239                             + cx18_stream_info[type].num_offset;
 240         }
 241         video_set_drvdata(s->video_dev, s);
 242
 243         /* Register device. First try the desired minor, then any free one. */
 244         ret = video_register_device(s->video_dev, vfl_type, num);
 245         if (ret < 0) {
 246                 CX18_ERR("Couldn't register v4l2 device for %s kernel number %d\n",
 247                         s->name, num);
 248                 video_device_release(s->video_dev);
 249                 s->video_dev = NULL;
 250                 return ret;
 251         }
 252         num = s->video_dev->num;
 253
 254         switch (vfl_type) {
 255         case VFL_TYPE_GRABBER:
 256                 CX18_INFO("Registered device video%d for %s (%d x %d kB)\n",
 257                           num, s->name, cx->stream_buffers[type],
 258                           cx->stream_buf_size[type]/1024);
 259                 break;
 260
 261         case VFL_TYPE_RADIO:
 262                 CX18_INFO("Registered device radio%d for %s\n",
 263                         num, s->name);
 264                 break;
 265
 266         case VFL_TYPE_VBI:
 267                 if (cx->stream_buffers[type])
 268                         CX18_INFO("Registered device vbi%d for %s "
 269                                   "(%d x %d bytes)\n",
 270                                   num, s->name, cx->stream_buffers[type],
 271                                   cx->stream_buf_size[type]);
 272                 else
 273                         CX18_INFO("Registered device vbi%d for %s\n",
 274                                 num, s->name);
 275                 break;
 276         }
 277
 278         return 0;
 279 }
 280
 281 /* Register v4l2 devices */
 282 int cx18_streams_register(struct cx18 *cx)
 283 {
 284         int type;
 285         int err;
 286         int ret = 0;
 287
 288         /* Register V4L2 devices */
 289         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 290                 err = cx18_reg_dev(cx, type);
 291                 if (err && ret == 0)
 292                         ret = err;
 293         }
 294
 295         if (ret == 0)
 296                 return 0;
 297
 298         /* One or more streams could not be initialized. Clean 'em all up. */
 299         cx18_streams_cleanup(cx, 1);
 300         return ret;
 301 }
 302
 303 /* Unregister v4l2 devices */
 304 void cx18_streams_cleanup(struct cx18 *cx, int unregister)
 305 {
 306         struct video_device *vdev;
 307         int type;
 308
 309         /* Teardown all streams */
 310         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 311                 if (cx->streams[type].dvb.enabled) {
 312                         cx18_dvb_unregister(&cx->streams[type]);
 313                         cx->streams[type].dvb.enabled = false;
 314                 }
 315
 316                 vdev = cx->streams[type].video_dev;
 317
 318                 cx->streams[type].video_dev = NULL;
 319                 if (vdev == NULL)
 320                         continue;
 321
 322                 cx18_stream_free(&cx->streams[type]);
 323
 324                 /* Unregister or release device */
 325                 if (unregister)
 326                         video_unregister_device(vdev);
 327                 else
 328                         video_device_release(vdev);
 329         }
 330 }
 331
 332 static void cx18_vbi_setup(struct cx18_stream *s)
 333 {
 334         struct cx18 *cx = s->cx;
 335         int raw = cx18_raw_vbi(cx);
 336         u32 data[CX2341X_MBOX_MAX_DATA];
 337         int lines;
 338
 339         if (cx->is_60hz) {
 340                 cx->vbi.count = 12;
 341                 cx->vbi.start[0] = 10;
 342                 cx->vbi.start[1] = 273;
 343         } else {        /* PAL/SECAM */
 344                 cx->vbi.count = 18;
 345                 cx->vbi.start[0] = 6;
 346                 cx->vbi.start[1] = 318;
 347         }
 348
 349         /* setup VBI registers */
 350         v4l2_subdev_call(cx->sd_av, video, s_fmt, &cx->vbi.in);
 351
 352         /*
 353          * Send the CX18_CPU_SET_RAW_VBI_PARAM API command to setup Encoder Raw
 354          * VBI when the first analog capture channel starts, as once it starts
 355          * (e.g. MPEG), we can't effect any change in the Encoder Raw VBI setup
 356          * (i.e. for the VBI capture channels).  We also send it for each
 357          * analog capture channel anyway just to make sure we get the proper
 358          * behavior
 359          */
 360         if (raw) {
 361                 lines = cx->vbi.count * 2;
 362         } else {
 363                 /*
 364                  * For 525/60 systems, according to the VIP 2 & BT.656 std:
 365                  * The EAV RP code's Field bit toggles on line 4, a few lines
 366                  * after the Vertcal Blank bit has already toggled.
 367                  * Tell the encoder to capture 21-4+1=18 lines per field,
 368                  * since we want lines 10 through 21.
 369                  *
 370                  * FIXME - revisit for 625/50 systems
 371                  */
 372                 lines = cx->is_60hz ? (21 - 4 + 1) * 2 : 38;
 373         }
 374
 375         data[0] = s->handle;
 376         /* Lines per field */
 377         data[1] = (lines / 2) | ((lines / 2) << 16);
 378         /* bytes per line */
 379         data[2] = (raw ? vbi_active_samples
 380                        : (cx->is_60hz ? vbi_hblank_samples_60Hz
 381                                       : vbi_hblank_samples_50Hz));
 382         /* Every X number of frames a VBI interrupt arrives
 383            (frames as in 25 or 30 fps) */
 384         data[3] = 1;
 385         /*
 386          * Set the SAV/EAV RP codes to look for as start/stop points
 387          * when in VIP-1.1 mode
 388          */
 389         if (raw) {
 390                 /*
 391                  * Start codes for beginning of "active" line in vertical blank
 392                  * 0x20 (               VerticalBlank                )
 393                  * 0x60 (     EvenField VerticalBlank                )
 394                  */
 395                 data[4] = 0x20602060;
 396                 /*
 397                  * End codes for end of "active" raw lines and regular lines
 398                  * 0x30 (               VerticalBlank HorizontalBlank)
 399                  * 0x70 (     EvenField VerticalBlank HorizontalBlank)
 400                  * 0x90 (Task                         HorizontalBlank)
 401                  * 0xd0 (Task EvenField               HorizontalBlank)
 402                  */
 403                 data[5] = 0x307090d0;
 404         } else {
 405                 /*
 406                  * End codes for active video, we want data in the hblank region
 407                  * 0xb0 (Task         0 VerticalBlank HorizontalBlank)
 408                  * 0xf0 (Task EvenField VerticalBlank HorizontalBlank)
 409                  *
 410                  * Since the V bit is only allowed to toggle in the EAV RP code,
 411                  * just before the first active region line, these two
 412                  * are problematic:
 413                  * 0x90 (Task                         HorizontalBlank)
 414                  * 0xd0 (Task EvenField               HorizontalBlank)
 415                  *
 416                  * We have set the digitzer such that we don't have to worry
 417                  * about these problem codes.
 418                  */
 419                 data[4] = 0xB0F0B0F0;
 420                 /*
 421                  * Start codes for beginning of active line in vertical blank
 422                  * 0xa0 (Task           VerticalBlank                )
 423                  * 0xe0 (Task EvenField VerticalBlank                )
 424                  */
 425                 data[5] = 0xA0E0A0E0;
 426         }
 427
 428         CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
 429                         data[0], data[1], data[2], data[3], data[4], data[5]);
 430
 431         cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
 432 }
 433
 434 struct cx18_queue *cx18_stream_put_buf_fw(struct cx18_stream *s,
 435                                           struct cx18_buffer *buf)
 436 {
 437         struct cx18 *cx = s->cx;
 438         struct cx18_queue *q;
 439
 440         /* Don't give it to the firmware, if we're not running a capture */
 441         if (s->handle == CX18_INVALID_TASK_HANDLE ||
 442             !test_bit(CX18_F_S_STREAMING, &s->s_flags))
 443                 return cx18_enqueue(s, buf, &s->q_free);
 444
 445         q = cx18_enqueue(s, buf, &s->q_busy);
 446         if (q != &s->q_busy)
 447                 return q; /* The firmware has the max buffers it can handle */
 448
 449         cx18_buf_sync_for_device(s, buf);
 450         cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
 451                   (void __iomem *) &cx->scb->cpu_mdl[buf->id] - cx->enc_mem,
 452                   1, buf->id, s->buf_size);
 453         return q;
 454 }
 455
 456 void cx18_stream_load_fw_queue(struct cx18_stream *s)
 457 {
 458         struct cx18_queue *q;
 459         struct cx18_buffer *buf;
 460
 461         if (atomic_read(&s->q_free.buffers) == 0 ||
 462             atomic_read(&s->q_busy.buffers) >= CX18_MAX_FW_MDLS_PER_STREAM)
 463                 return;
 464
 465         /* Move from q_free to q_busy notifying the firmware, until the limit */
 466         do {
 467                 buf = cx18_dequeue(s, &s->q_free);
 468                 if (buf == NULL)
 469                         break;
 470                 q = cx18_stream_put_buf_fw(s, buf);
 471         } while (atomic_read(&s->q_busy.buffers) < CX18_MAX_FW_MDLS_PER_STREAM
 472                  && q == &s->q_busy);
 473 }
 474
 475 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
 476 {
 477         u32 data[MAX_MB_ARGUMENTS];
 478         struct cx18 *cx = s->cx;
 479         struct cx18_buffer *buf;
 480         int captype = 0;
 481         struct cx18_api_func_private priv;
 482
 483         if (s->video_dev == NULL && s->dvb.enabled == 0)
 484                 return -EINVAL;
 485
 486         CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
 487
 488         switch (s->type) {
 489         case CX18_ENC_STREAM_TYPE_MPG:
 490                 captype = CAPTURE_CHANNEL_TYPE_MPEG;
 491                 cx->mpg_data_received = cx->vbi_data_inserted = 0;
 492                 cx->dualwatch_jiffies = jiffies;
 493                 cx->dualwatch_stereo_mode = cx->params.audio_properties & 0x300;
 494                 cx->search_pack_header = 0;
 495                 break;
 496
 497         case CX18_ENC_STREAM_TYPE_TS:
 498                 captype = CAPTURE_CHANNEL_TYPE_TS;
 499                 break;
 500         case CX18_ENC_STREAM_TYPE_YUV:
 501                 captype = CAPTURE_CHANNEL_TYPE_YUV;
 502                 break;
 503         case CX18_ENC_STREAM_TYPE_PCM:
 504                 captype = CAPTURE_CHANNEL_TYPE_PCM;
 505                 break;
 506         case CX18_ENC_STREAM_TYPE_VBI:
 507 #ifdef CX18_ENCODER_PARSES_SLICED
 508                 captype = cx18_raw_vbi(cx) ?
 509                      CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
 510 #else
 511                 /*
 512                  * Currently we set things up so that Sliced VBI from the
 513                  * digitizer is handled as Raw VBI by the encoder
 514                  */
 515                 captype = CAPTURE_CHANNEL_TYPE_VBI;
 516 #endif
 517                 cx->vbi.frame = 0;
 518                 cx->vbi.inserted_frame = 0;
 519                 memset(cx->vbi.sliced_mpeg_size,
 520                         0, sizeof(cx->vbi.sliced_mpeg_size));
 521                 break;
 522         default:
 523                 return -EINVAL;
 524         }
 525
 526         /* Clear Streamoff flags in case left from last capture */
 527         clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
 528
 529         cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
 530         s->handle = data[0];
 531         cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
 532
 533         /*
 534          * For everything but CAPTURE_CHANNEL_TYPE_TS, play it safe and
 535          * set up all the parameters, as it is not obvious which parameters the
 536          * firmware shares across capture channel types and which it does not.
 537          *
 538          * Some of the cx18_vapi() calls below apply to only certain capture
 539          * channel types.  We're hoping there's no harm in calling most of them
 540          * anyway, as long as the values are all consistent.  Setting some
 541          * shared parameters will have no effect once an analog capture channel
 542          * has started streaming.
 543          */
 544         if (captype != CAPTURE_CHANNEL_TYPE_TS) {
 545                 cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
 546                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
 547                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
 548                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
 549
 550                 /*
 551                  * Audio related reset according to
 552                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
 553                  */
 554                 if (atomic_read(&cx->ana_capturing) == 0)
 555                         cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2,
 556                                   s->handle, 12);
 557
 558                 /*
 559                  * Number of lines for Field 1 & Field 2 according to
 560                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
 561                  * Field 1 is 312 for 625 line systems in BT.656
 562                  * Field 2 is 313 for 625 line systems in BT.656
 563                  */
 564                 cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
 565                           s->handle, 312, 313);
 566
 567                 if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
 568                         cx18_vbi_setup(s);
 569
 570                 /*
 571                  * assign program index info.
 572                  * Mask 7: select I/P/B, Num_req: 400 max
 573                  * FIXME - currently we have this hardcoded as disabled
 574                  */
 575                 cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 1, 0);
 576
 577                 /* Call out to the common CX2341x API setup for user controls */
 578                 priv.cx = cx;
 579                 priv.s = s;
 580                 cx2341x_update(&priv, cx18_api_func, NULL, &cx->params);
 581
 582                 /*
 583                  * When starting a capture and we're set for radio,
 584                  * ensure the video is muted, despite the user control.
 585                  */
 586                 if (!cx->params.video_mute &&
 587                     test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
 588                         cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
 589                                   (cx->params.video_mute_yuv << 8) | 1);
 590         }
 591
 592         if (atomic_read(&cx->tot_capturing) == 0) {
 593                 clear_bit(CX18_F_I_EOS, &cx->i_flags);
 594                 cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
 595         }
 596
 597         cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
 598                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
 599                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
 600
 601         /* Init all the cpu_mdls for this stream */
 602         cx18_flush_queues(s);
 603         mutex_lock(&s->qlock);
 604         list_for_each_entry(buf, &s->q_free.list, list) {
 605                 cx18_writel(cx, buf->dma_handle,
 606                                         &cx->scb->cpu_mdl[buf->id].paddr);
 607                 cx18_writel(cx, s->buf_size, &cx->scb->cpu_mdl[buf->id].length);
 608         }
 609         mutex_unlock(&s->qlock);
 610         cx18_stream_load_fw_queue(s);
 611
 612         /* begin_capture */
 613         if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
 614                 CX18_DEBUG_WARN("Error starting capture!\n");
 615                 /* Ensure we're really not capturing before releasing MDLs */
 616                 if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 617                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
 618                 else
 619                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 620                 clear_bit(CX18_F_S_STREAMING, &s->s_flags);
 621                 /* FIXME - CX18_F_S_STREAMOFF as well? */
 622                 cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 623                 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 624                 s->handle = CX18_INVALID_TASK_HANDLE;
 625                 if (atomic_read(&cx->tot_capturing) == 0) {
 626                         set_bit(CX18_F_I_EOS, &cx->i_flags);
 627                         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
 628                 }
 629                 return -EINVAL;
 630         }
 631
 632         /* you're live! sit back and await interrupts :) */
 633         if (captype != CAPTURE_CHANNEL_TYPE_TS)
 634                 atomic_inc(&cx->ana_capturing);
 635         atomic_inc(&cx->tot_capturing);
 636         return 0;
 637 }
 638
 639 void cx18_stop_all_captures(struct cx18 *cx)
 640 {
 641         int i;
 642
 643         for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
 644                 struct cx18_stream *s = &cx->streams[i];
 645
 646                 if (s->video_dev == NULL && s->dvb.enabled == 0)
 647                         continue;
 648                 if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
 649                         cx18_stop_v4l2_encode_stream(s, 0);
 650         }
 651 }
 652
 653 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
 654 {
 655         struct cx18 *cx = s->cx;
 656         unsigned long then;
 657
 658         if (s->video_dev == NULL && s->dvb.enabled == 0)
 659                 return -EINVAL;
 660
 661         /* This function assumes that you are allowed to stop the capture
 662            and that we are actually capturing */
 663
 664         CX18_DEBUG_INFO("Stop Capture\n");
 665
 666         if (atomic_read(&cx->tot_capturing) == 0)
 667                 return 0;
 668
 669         if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 670                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
 671         else
 672                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 673
 674         then = jiffies;
 675
 676         if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
 677                 CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
 678         }
 679
 680         if (s->type != CX18_ENC_STREAM_TYPE_TS)
 681                 atomic_dec(&cx->ana_capturing);
 682         atomic_dec(&cx->tot_capturing);
 683
 684         /* Clear capture and no-read bits */
 685         clear_bit(CX18_F_S_STREAMING, &s->s_flags);
 686
 687         /* Tell the CX23418 it can't use our buffers anymore */
 688         cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 689
 690         cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 691         s->handle = CX18_INVALID_TASK_HANDLE;
 692
 693         if (atomic_read(&cx->tot_capturing) > 0)
 694                 return 0;
 695
 696         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
 697         wake_up(&s->waitq);
 698
 699         return 0;
 700 }
 701
 702 u32 cx18_find_handle(struct cx18 *cx)
 703 {
 704         int i;
 705
 706         /* find first available handle to be used for global settings */
 707         for (i = 0; i < CX18_MAX_STREAMS; i++) {
 708                 struct cx18_stream *s = &cx->streams[i];
 709
 710                 if (s->video_dev && (s->handle != CX18_INVALID_TASK_HANDLE))
 711                         return s->handle;
 712         }
 713         return CX18_INVALID_TASK_HANDLE;
 714 }
 715
 716 struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle)
 717 {
 718         int i;
 719         struct cx18_stream *s;
 720
 721         if (handle == CX18_INVALID_TASK_HANDLE)
 722                 return NULL;
 723
 724         for (i = 0; i < CX18_MAX_STREAMS; i++) {
 725                 s = &cx->streams[i];
 726                 if (s->handle != handle)
 727                         continue;
 728                 if (s->video_dev || s->dvb.enabled)
 729                         return s;
 730         }
 731         return NULL;
 732 }