git.oblomov.eu Git - 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-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         init_waitqueue_head(&s->waitq);
 120         s->id = -1;
 121         spin_lock_init(&s->q_free.lock);
 122         cx18_queue_init(&s->q_free);
 123         spin_lock_init(&s->q_busy.lock);
 124         cx18_queue_init(&s->q_busy);
 125         spin_lock_init(&s->q_full.lock);
 126         cx18_queue_init(&s->q_full);
 127
 128         INIT_WORK(&s->out_work_order, cx18_out_work_handler);
 129 }
 130
 131 static int cx18_prep_dev(struct cx18 *cx, int type)
 132 {
 133         struct cx18_stream *s = &cx->streams[type];
 134         u32 cap = cx->v4l2_cap;
 135         int num_offset = cx18_stream_info[type].num_offset;
 136         int num = cx->instance + cx18_first_minor + num_offset;
 137
 138         /* These four fields are always initialized. If video_dev == NULL, then
 139            this stream is not in use. In that case no other fields but these
 140            four can be used. */
 141         s->video_dev = NULL;
 142         s->cx = cx;
 143         s->type = type;
 144         s->name = cx18_stream_info[type].name;
 145
 146         /* Check whether the radio is supported */
 147         if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
 148                 return 0;
 149
 150         /* Check whether VBI is supported */
 151         if (type == CX18_ENC_STREAM_TYPE_VBI &&
 152             !(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
 153                 return 0;
 154
 155         /* User explicitly selected 0 buffers for these streams, so don't
 156            create them. */
 157         if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
 158             cx->stream_buffers[type] == 0) {
 159                 CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
 160                 return 0;
 161         }
 162
 163         cx18_stream_init(cx, type);
 164
 165         if (num_offset == -1)
 166                 return 0;
 167
 168         /* allocate and initialize the v4l2 video device structure */
 169         s->video_dev = video_device_alloc();
 170         if (s->video_dev == NULL) {
 171                 CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
 172                                 s->name);
 173                 return -ENOMEM;
 174         }
 175
 176         snprintf(s->video_dev->name, sizeof(s->video_dev->name), "%s %s",
 177                  cx->v4l2_dev.name, s->name);
 178
 179         s->video_dev->num = num;
 180         s->video_dev->v4l2_dev = &cx->v4l2_dev;
 181         s->video_dev->fops = &cx18_v4l2_enc_fops;
 182         s->video_dev->release = video_device_release;
 183         s->video_dev->tvnorms = V4L2_STD_ALL;
 184         cx18_set_funcs(s->video_dev);
 185         return 0;
 186 }
 187
 188 /* Initialize v4l2 variables and register v4l2 devices */
 189 int cx18_streams_setup(struct cx18 *cx)
 190 {
 191         int type, ret;
 192
 193         /* Setup V4L2 Devices */
 194         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 195                 /* Prepare device */
 196                 ret = cx18_prep_dev(cx, type);
 197                 if (ret < 0)
 198                         break;
 199
 200                 /* Allocate Stream */
 201                 ret = cx18_stream_alloc(&cx->streams[type]);
 202                 if (ret < 0)
 203                         break;
 204         }
 205         if (type == CX18_MAX_STREAMS)
 206                 return 0;
 207
 208         /* One or more streams could not be initialized. Clean 'em all up. */
 209         cx18_streams_cleanup(cx, 0);
 210         return ret;
 211 }
 212
 213 static int cx18_reg_dev(struct cx18 *cx, int type)
 214 {
 215         struct cx18_stream *s = &cx->streams[type];
 216         int vfl_type = cx18_stream_info[type].vfl_type;
 217         int num, ret;
 218
 219         /* TODO: Shouldn't this be a VFL_TYPE_TRANSPORT or something?
 220          * We need a VFL_TYPE_TS defined.
 221          */
 222         if (strcmp("TS", s->name) == 0) {
 223                 /* just return if no DVB is supported */
 224                 if ((cx->card->hw_all & CX18_HW_DVB) == 0)
 225                         return 0;
 226                 ret = cx18_dvb_register(s);
 227                 if (ret < 0) {
 228                         CX18_ERR("DVB failed to register\n");
 229                         return ret;
 230                 }
 231         }
 232
 233         if (s->video_dev == NULL)
 234                 return 0;
 235
 236         num = s->video_dev->num;
 237         /* card number + user defined offset + device offset */
 238         if (type != CX18_ENC_STREAM_TYPE_MPG) {
 239                 struct cx18_stream *s_mpg = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
 240
 241                 if (s_mpg->video_dev)
 242                         num = s_mpg->video_dev->num
 243                             + cx18_stream_info[type].num_offset;
 244         }
 245         video_set_drvdata(s->video_dev, s);
 246
 247         /* Register device. First try the desired minor, then any free one. */
 248         ret = video_register_device(s->video_dev, vfl_type, num);
 249         if (ret < 0) {
 250                 CX18_ERR("Couldn't register v4l2 device for %s kernel number %d\n",
 251                         s->name, num);
 252                 video_device_release(s->video_dev);
 253                 s->video_dev = NULL;
 254                 return ret;
 255         }
 256         num = s->video_dev->num;
 257
 258         switch (vfl_type) {
 259         case VFL_TYPE_GRABBER:
 260                 CX18_INFO("Registered device video%d for %s (%d x %d kB)\n",
 261                           num, s->name, cx->stream_buffers[type],
 262                           cx->stream_buf_size[type]/1024);
 263                 break;
 264
 265         case VFL_TYPE_RADIO:
 266                 CX18_INFO("Registered device radio%d for %s\n",
 267                         num, s->name);
 268                 break;
 269
 270         case VFL_TYPE_VBI:
 271                 if (cx->stream_buffers[type])
 272                         CX18_INFO("Registered device vbi%d for %s "
 273                                   "(%d x %d bytes)\n",
 274                                   num, s->name, cx->stream_buffers[type],
 275                                   cx->stream_buf_size[type]);
 276                 else
 277                         CX18_INFO("Registered device vbi%d for %s\n",
 278                                 num, s->name);
 279                 break;
 280         }
 281
 282         return 0;
 283 }
 284
 285 /* Register v4l2 devices */
 286 int cx18_streams_register(struct cx18 *cx)
 287 {
 288         int type;
 289         int err;
 290         int ret = 0;
 291
 292         /* Register V4L2 devices */
 293         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 294                 err = cx18_reg_dev(cx, type);
 295                 if (err && ret == 0)
 296                         ret = err;
 297         }
 298
 299         if (ret == 0)
 300                 return 0;
 301
 302         /* One or more streams could not be initialized. Clean 'em all up. */
 303         cx18_streams_cleanup(cx, 1);
 304         return ret;
 305 }
 306
 307 /* Unregister v4l2 devices */
 308 void cx18_streams_cleanup(struct cx18 *cx, int unregister)
 309 {
 310         struct video_device *vdev;
 311         int type;
 312
 313         /* Teardown all streams */
 314         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 315                 if (cx->streams[type].dvb.enabled) {
 316                         cx18_dvb_unregister(&cx->streams[type]);
 317                         cx->streams[type].dvb.enabled = false;
 318                 }
 319
 320                 vdev = cx->streams[type].video_dev;
 321
 322                 cx->streams[type].video_dev = NULL;
 323                 if (vdev == NULL)
 324                         continue;
 325
 326                 cx18_stream_free(&cx->streams[type]);
 327
 328                 /* Unregister or release device */
 329                 if (unregister)
 330                         video_unregister_device(vdev);
 331                 else
 332                         video_device_release(vdev);
 333         }
 334 }
 335
 336 static void cx18_vbi_setup(struct cx18_stream *s)
 337 {
 338         struct cx18 *cx = s->cx;
 339         int raw = cx18_raw_vbi(cx);
 340         u32 data[CX2341X_MBOX_MAX_DATA];
 341         int lines;
 342
 343         if (cx->is_60hz) {
 344                 cx->vbi.count = 12;
 345                 cx->vbi.start[0] = 10;
 346                 cx->vbi.start[1] = 273;
 347         } else {        /* PAL/SECAM */
 348                 cx->vbi.count = 18;
 349                 cx->vbi.start[0] = 6;
 350                 cx->vbi.start[1] = 318;
 351         }
 352
 353         /* setup VBI registers */
 354         v4l2_subdev_call(cx->sd_av, video, s_fmt, &cx->vbi.in);
 355
 356         /*
 357          * Send the CX18_CPU_SET_RAW_VBI_PARAM API command to setup Encoder Raw
 358          * VBI when the first analog capture channel starts, as once it starts
 359          * (e.g. MPEG), we can't effect any change in the Encoder Raw VBI setup
 360          * (i.e. for the VBI capture channels).  We also send it for each
 361          * analog capture channel anyway just to make sure we get the proper
 362          * behavior
 363          */
 364         if (raw) {
 365                 lines = cx->vbi.count * 2;
 366         } else {
 367                 /*
 368                  * For 525/60 systems, according to the VIP 2 & BT.656 std:
 369                  * The EAV RP code's Field bit toggles on line 4, a few lines
 370                  * after the Vertcal Blank bit has already toggled.
 371                  * Tell the encoder to capture 21-4+1=18 lines per field,
 372                  * since we want lines 10 through 21.
 373                  *
 374                  * For 625/50 systems, according to the VIP 2 & BT.656 std:
 375                  * The EAV RP code's Field bit toggles on line 1, a few lines
 376                  * after the Vertcal Blank bit has already toggled.
 377                  * (We've actually set the digitizer so that the Field bit
 378                  * toggles on line 2.) Tell the encoder to capture 23-2+1=22
 379                  * lines per field, since we want lines 6 through 23.
 380                  */
 381                 lines = cx->is_60hz ? (21 - 4 + 1) * 2 : (23 - 2 + 1) * 2;
 382         }
 383
 384         data[0] = s->handle;
 385         /* Lines per field */
 386         data[1] = (lines / 2) | ((lines / 2) << 16);
 387         /* bytes per line */
 388         data[2] = (raw ? vbi_active_samples
 389                        : (cx->is_60hz ? vbi_hblank_samples_60Hz
 390                                       : vbi_hblank_samples_50Hz));
 391         /* Every X number of frames a VBI interrupt arrives
 392            (frames as in 25 or 30 fps) */
 393         data[3] = 1;
 394         /*
 395          * Set the SAV/EAV RP codes to look for as start/stop points
 396          * when in VIP-1.1 mode
 397          */
 398         if (raw) {
 399                 /*
 400                  * Start codes for beginning of "active" line in vertical blank
 401                  * 0x20 (               VerticalBlank                )
 402                  * 0x60 (     EvenField VerticalBlank                )
 403                  */
 404                 data[4] = 0x20602060;
 405                 /*
 406                  * End codes for end of "active" raw lines and regular lines
 407                  * 0x30 (               VerticalBlank HorizontalBlank)
 408                  * 0x70 (     EvenField VerticalBlank HorizontalBlank)
 409                  * 0x90 (Task                         HorizontalBlank)
 410                  * 0xd0 (Task EvenField               HorizontalBlank)
 411                  */
 412                 data[5] = 0x307090d0;
 413         } else {
 414                 /*
 415                  * End codes for active video, we want data in the hblank region
 416                  * 0xb0 (Task         0 VerticalBlank HorizontalBlank)
 417                  * 0xf0 (Task EvenField VerticalBlank HorizontalBlank)
 418                  *
 419                  * Since the V bit is only allowed to toggle in the EAV RP code,
 420                  * just before the first active region line, these two
 421                  * are problematic:
 422                  * 0x90 (Task                         HorizontalBlank)
 423                  * 0xd0 (Task EvenField               HorizontalBlank)
 424                  *
 425                  * We have set the digitzer such that we don't have to worry
 426                  * about these problem codes.
 427                  */
 428                 data[4] = 0xB0F0B0F0;
 429                 /*
 430                  * Start codes for beginning of active line in vertical blank
 431                  * 0xa0 (Task           VerticalBlank                )
 432                  * 0xe0 (Task EvenField VerticalBlank                )
 433                  */
 434                 data[5] = 0xA0E0A0E0;
 435         }
 436
 437         CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
 438                         data[0], data[1], data[2], data[3], data[4], data[5]);
 439
 440         cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
 441 }
 442
 443 static
 444 struct cx18_queue *_cx18_stream_put_buf_fw(struct cx18_stream *s,
 445                                            struct cx18_buffer *buf)
 446 {
 447         struct cx18 *cx = s->cx;
 448         struct cx18_queue *q;
 449
 450         /* Don't give it to the firmware, if we're not running a capture */
 451         if (s->handle == CX18_INVALID_TASK_HANDLE ||
 452             test_bit(CX18_F_S_STOPPING, &s->s_flags) ||
 453             !test_bit(CX18_F_S_STREAMING, &s->s_flags))
 454                 return cx18_enqueue(s, buf, &s->q_free);
 455
 456         q = cx18_enqueue(s, buf, &s->q_busy);
 457         if (q != &s->q_busy)
 458                 return q; /* The firmware has the max buffers it can handle */
 459
 460         cx18_buf_sync_for_device(s, buf);
 461         cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
 462                   (void __iomem *) &cx->scb->cpu_mdl[buf->id] - cx->enc_mem,
 463                   1, buf->id, s->buf_size);
 464         return q;
 465 }
 466
 467 static
 468 void _cx18_stream_load_fw_queue(struct cx18_stream *s)
 469 {
 470         struct cx18_queue *q;
 471         struct cx18_buffer *buf;
 472
 473         if (atomic_read(&s->q_free.buffers) == 0 ||
 474             atomic_read(&s->q_busy.buffers) >= CX18_MAX_FW_MDLS_PER_STREAM)
 475                 return;
 476
 477         /* Move from q_free to q_busy notifying the firmware, until the limit */
 478         do {
 479                 buf = cx18_dequeue(s, &s->q_free);
 480                 if (buf == NULL)
 481                         break;
 482                 q = _cx18_stream_put_buf_fw(s, buf);
 483         } while (atomic_read(&s->q_busy.buffers) < CX18_MAX_FW_MDLS_PER_STREAM
 484                  && q == &s->q_busy);
 485 }
 486
 487 void cx18_out_work_handler(struct work_struct *work)
 488 {
 489         struct cx18_stream *s =
 490                          container_of(work, struct cx18_stream, out_work_order);
 491
 492         _cx18_stream_load_fw_queue(s);
 493 }
 494
 495 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
 496 {
 497         u32 data[MAX_MB_ARGUMENTS];
 498         struct cx18 *cx = s->cx;
 499         struct cx18_buffer *buf;
 500         int captype = 0;
 501         struct cx18_api_func_private priv;
 502
 503         if (s->video_dev == NULL && s->dvb.enabled == 0)
 504                 return -EINVAL;
 505
 506         CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
 507
 508         switch (s->type) {
 509         case CX18_ENC_STREAM_TYPE_MPG:
 510                 captype = CAPTURE_CHANNEL_TYPE_MPEG;
 511                 cx->mpg_data_received = cx->vbi_data_inserted = 0;
 512                 cx->dualwatch_jiffies = jiffies;
 513                 cx->dualwatch_stereo_mode = cx->params.audio_properties & 0x300;
 514                 cx->search_pack_header = 0;
 515                 break;
 516
 517         case CX18_ENC_STREAM_TYPE_TS:
 518                 captype = CAPTURE_CHANNEL_TYPE_TS;
 519                 break;
 520         case CX18_ENC_STREAM_TYPE_YUV:
 521                 captype = CAPTURE_CHANNEL_TYPE_YUV;
 522                 break;
 523         case CX18_ENC_STREAM_TYPE_PCM:
 524                 captype = CAPTURE_CHANNEL_TYPE_PCM;
 525                 break;
 526         case CX18_ENC_STREAM_TYPE_VBI:
 527 #ifdef CX18_ENCODER_PARSES_SLICED
 528                 captype = cx18_raw_vbi(cx) ?
 529                      CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
 530 #else
 531                 /*
 532                  * Currently we set things up so that Sliced VBI from the
 533                  * digitizer is handled as Raw VBI by the encoder
 534                  */
 535                 captype = CAPTURE_CHANNEL_TYPE_VBI;
 536 #endif
 537                 cx->vbi.frame = 0;
 538                 cx->vbi.inserted_frame = 0;
 539                 memset(cx->vbi.sliced_mpeg_size,
 540                         0, sizeof(cx->vbi.sliced_mpeg_size));
 541                 break;
 542         default:
 543                 return -EINVAL;
 544         }
 545
 546         /* Clear Streamoff flags in case left from last capture */
 547         clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
 548
 549         cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
 550         s->handle = data[0];
 551         cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
 552
 553         /*
 554          * For everything but CAPTURE_CHANNEL_TYPE_TS, play it safe and
 555          * set up all the parameters, as it is not obvious which parameters the
 556          * firmware shares across capture channel types and which it does not.
 557          *
 558          * Some of the cx18_vapi() calls below apply to only certain capture
 559          * channel types.  We're hoping there's no harm in calling most of them
 560          * anyway, as long as the values are all consistent.  Setting some
 561          * shared parameters will have no effect once an analog capture channel
 562          * has started streaming.
 563          */
 564         if (captype != CAPTURE_CHANNEL_TYPE_TS) {
 565                 cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
 566                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
 567                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
 568                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
 569
 570                 /*
 571                  * Audio related reset according to
 572                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
 573                  */
 574                 if (atomic_read(&cx->ana_capturing) == 0)
 575                         cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2,
 576                                   s->handle, 12);
 577
 578                 /*
 579                  * Number of lines for Field 1 & Field 2 according to
 580                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
 581                  * Field 1 is 312 for 625 line systems in BT.656
 582                  * Field 2 is 313 for 625 line systems in BT.656
 583                  */
 584                 cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
 585                           s->handle, 312, 313);
 586
 587                 if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
 588                         cx18_vbi_setup(s);
 589
 590                 /*
 591                  * assign program index info.
 592                  * Mask 7: select I/P/B, Num_req: 400 max
 593                  * FIXME - currently we have this hardcoded as disabled
 594                  */
 595                 cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 1, 0);
 596
 597                 /* Call out to the common CX2341x API setup for user controls */
 598                 priv.cx = cx;
 599                 priv.s = s;
 600                 cx2341x_update(&priv, cx18_api_func, NULL, &cx->params);
 601
 602                 /*
 603                  * When starting a capture and we're set for radio,
 604                  * ensure the video is muted, despite the user control.
 605                  */
 606                 if (!cx->params.video_mute &&
 607                     test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
 608                         cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
 609                                   (cx->params.video_mute_yuv << 8) | 1);
 610         }
 611
 612         if (atomic_read(&cx->tot_capturing) == 0) {
 613                 clear_bit(CX18_F_I_EOS, &cx->i_flags);
 614                 cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
 615         }
 616
 617         cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
 618                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
 619                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
 620
 621         /* Init all the cpu_mdls for this stream */
 622         cx18_flush_queues(s);
 623         spin_lock(&s->q_free.lock);
 624         list_for_each_entry(buf, &s->q_free.list, list) {
 625                 cx18_writel(cx, buf->dma_handle,
 626                                         &cx->scb->cpu_mdl[buf->id].paddr);
 627                 cx18_writel(cx, s->buf_size, &cx->scb->cpu_mdl[buf->id].length);
 628         }
 629         spin_unlock(&s->q_free.lock);
 630         _cx18_stream_load_fw_queue(s);
 631
 632         /* begin_capture */
 633         if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
 634                 CX18_DEBUG_WARN("Error starting capture!\n");
 635                 /* Ensure we're really not capturing before releasing MDLs */
 636                 set_bit(CX18_F_S_STOPPING, &s->s_flags);
 637                 if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 638                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
 639                 else
 640                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 641                 clear_bit(CX18_F_S_STREAMING, &s->s_flags);
 642                 /* FIXME - CX18_F_S_STREAMOFF as well? */
 643                 cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 644                 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 645                 s->handle = CX18_INVALID_TASK_HANDLE;
 646                 clear_bit(CX18_F_S_STOPPING, &s->s_flags);
 647                 if (atomic_read(&cx->tot_capturing) == 0) {
 648                         set_bit(CX18_F_I_EOS, &cx->i_flags);
 649                         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
 650                 }
 651                 return -EINVAL;
 652         }
 653
 654         /* you're live! sit back and await interrupts :) */
 655         if (captype != CAPTURE_CHANNEL_TYPE_TS)
 656                 atomic_inc(&cx->ana_capturing);
 657         atomic_inc(&cx->tot_capturing);
 658         return 0;
 659 }
 660
 661 void cx18_stop_all_captures(struct cx18 *cx)
 662 {
 663         int i;
 664
 665         for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
 666                 struct cx18_stream *s = &cx->streams[i];
 667
 668                 if (s->video_dev == NULL && s->dvb.enabled == 0)
 669                         continue;
 670                 if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
 671                         cx18_stop_v4l2_encode_stream(s, 0);
 672         }
 673 }
 674
 675 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
 676 {
 677         struct cx18 *cx = s->cx;
 678         unsigned long then;
 679
 680         if (s->video_dev == NULL && s->dvb.enabled == 0)
 681                 return -EINVAL;
 682
 683         /* This function assumes that you are allowed to stop the capture
 684            and that we are actually capturing */
 685
 686         CX18_DEBUG_INFO("Stop Capture\n");
 687
 688         if (atomic_read(&cx->tot_capturing) == 0)
 689                 return 0;
 690
 691         set_bit(CX18_F_S_STOPPING, &s->s_flags);
 692         if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 693                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
 694         else
 695                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 696
 697         then = jiffies;
 698
 699         if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
 700                 CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
 701         }
 702
 703         if (s->type != CX18_ENC_STREAM_TYPE_TS)
 704                 atomic_dec(&cx->ana_capturing);
 705         atomic_dec(&cx->tot_capturing);
 706
 707         /* Clear capture and no-read bits */
 708         clear_bit(CX18_F_S_STREAMING, &s->s_flags);
 709
 710         /* Tell the CX23418 it can't use our buffers anymore */
 711         cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 712
 713         cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 714         s->handle = CX18_INVALID_TASK_HANDLE;
 715         clear_bit(CX18_F_S_STOPPING, &s->s_flags);
 716
 717         if (atomic_read(&cx->tot_capturing) > 0)
 718                 return 0;
 719
 720         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
 721         wake_up(&s->waitq);
 722
 723         return 0;
 724 }
 725
 726 u32 cx18_find_handle(struct cx18 *cx)
 727 {
 728         int i;
 729
 730         /* find first available handle to be used for global settings */
 731         for (i = 0; i < CX18_MAX_STREAMS; i++) {
 732                 struct cx18_stream *s = &cx->streams[i];
 733
 734                 if (s->video_dev && (s->handle != CX18_INVALID_TASK_HANDLE))
 735                         return s->handle;
 736         }
 737         return CX18_INVALID_TASK_HANDLE;
 738 }
 739
 740 struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle)
 741 {
 742         int i;
 743         struct cx18_stream *s;
 744
 745         if (handle == CX18_INVALID_TASK_HANDLE)
 746                 return NULL;
 747
 748         for (i = 0; i < CX18_MAX_STREAMS; i++) {
 749                 s = &cx->streams[i];
 750                 if (s->handle != handle)
 751                         continue;
 752                 if (s->video_dev || s->dvb.enabled)
 753                         return s;
 754         }
 755         return NULL;
 756 }