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-av-core.h"
  36 #include "cx18-dvb.h"
  37
  38 #define CX18_DSP0_INTERRUPT_MASK        0xd0004C
  39
  40 static struct v4l2_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         .release = cx18_v4l2_close,
  47         .poll = cx18_v4l2_enc_poll,
  48 };
  49
  50 /* offset from 0 to register ts v4l2 minors on */
  51 #define CX18_V4L2_ENC_TS_OFFSET   16
  52 /* offset from 0 to register pcm v4l2 minors on */
  53 #define CX18_V4L2_ENC_PCM_OFFSET  24
  54 /* offset from 0 to register yuv v4l2 minors on */
  55 #define CX18_V4L2_ENC_YUV_OFFSET  32
  56
  57 static struct {
  58         const char *name;
  59         int vfl_type;
  60         int num_offset;
  61         int dma;
  62         enum v4l2_buf_type buf_type;
  63 } cx18_stream_info[] = {
  64         {       /* CX18_ENC_STREAM_TYPE_MPG */
  65                 "encoder MPEG",
  66                 VFL_TYPE_GRABBER, 0,
  67                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
  68         },
  69         {       /* CX18_ENC_STREAM_TYPE_TS */
  70                 "TS",
  71                 VFL_TYPE_GRABBER, -1,
  72                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
  73         },
  74         {       /* CX18_ENC_STREAM_TYPE_YUV */
  75                 "encoder YUV",
  76                 VFL_TYPE_GRABBER, CX18_V4L2_ENC_YUV_OFFSET,
  77                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
  78         },
  79         {       /* CX18_ENC_STREAM_TYPE_VBI */
  80                 "encoder VBI",
  81                 VFL_TYPE_VBI, 0,
  82                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VBI_CAPTURE,
  83         },
  84         {       /* CX18_ENC_STREAM_TYPE_PCM */
  85                 "encoder PCM audio",
  86                 VFL_TYPE_GRABBER, CX18_V4L2_ENC_PCM_OFFSET,
  87                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_PRIVATE,
  88         },
  89         {       /* CX18_ENC_STREAM_TYPE_IDX */
  90                 "encoder IDX",
  91                 VFL_TYPE_GRABBER, -1,
  92                 PCI_DMA_FROMDEVICE, V4L2_BUF_TYPE_VIDEO_CAPTURE,
  93         },
  94         {       /* CX18_ENC_STREAM_TYPE_RAD */
  95                 "encoder radio",
  96                 VFL_TYPE_RADIO, 0,
  97                 PCI_DMA_NONE, V4L2_BUF_TYPE_PRIVATE,
  98         },
  99 };
 100
 101 static void cx18_stream_init(struct cx18 *cx, int type)
 102 {
 103         struct cx18_stream *s = &cx->streams[type];
 104         struct video_device *video_dev = s->video_dev;
 105
 106         /* we need to keep video_dev, so restore it afterwards */
 107         memset(s, 0, sizeof(*s));
 108         s->video_dev = video_dev;
 109
 110         /* initialize cx18_stream fields */
 111         s->cx = cx;
 112         s->type = type;
 113         s->name = cx18_stream_info[type].name;
 114         s->handle = CX18_INVALID_TASK_HANDLE;
 115
 116         s->dma = cx18_stream_info[type].dma;
 117         s->buffers = cx->stream_buffers[type];
 118         s->buf_size = cx->stream_buf_size[type];
 119
 120         mutex_init(&s->qlock);
 121         init_waitqueue_head(&s->waitq);
 122         s->id = -1;
 123         cx18_queue_init(&s->q_free);
 124         cx18_queue_init(&s->q_busy);
 125         cx18_queue_init(&s->q_full);
 126 }
 127
 128 static int cx18_prep_dev(struct cx18 *cx, int type)
 129 {
 130         struct cx18_stream *s = &cx->streams[type];
 131         u32 cap = cx->v4l2_cap;
 132         int num_offset = cx18_stream_info[type].num_offset;
 133         int num = cx->num + cx18_first_minor + num_offset;
 134
 135         /* These four fields are always initialized. If video_dev == NULL, then
 136            this stream is not in use. In that case no other fields but these
 137            four can be used. */
 138         s->video_dev = NULL;
 139         s->cx = cx;
 140         s->type = type;
 141         s->name = cx18_stream_info[type].name;
 142
 143         /* Check whether the radio is supported */
 144         if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
 145                 return 0;
 146
 147         /* Check whether VBI is supported */
 148         if (type == CX18_ENC_STREAM_TYPE_VBI &&
 149             !(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
 150                 return 0;
 151
 152         /* User explicitly selected 0 buffers for these streams, so don't
 153            create them. */
 154         if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
 155             cx->stream_buffers[type] == 0) {
 156                 CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
 157                 return 0;
 158         }
 159
 160         cx18_stream_init(cx, type);
 161
 162         if (num_offset == -1)
 163                 return 0;
 164
 165         /* allocate and initialize the v4l2 video device structure */
 166         s->video_dev = video_device_alloc();
 167         if (s->video_dev == NULL) {
 168                 CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
 169                                 s->name);
 170                 return -ENOMEM;
 171         }
 172
 173         snprintf(s->video_dev->name, sizeof(s->video_dev->name), "cx18-%d",
 174                         cx->num);
 175
 176         s->video_dev->num = num;
 177         s->video_dev->parent = &cx->pci_dev->dev;
 178         s->video_dev->fops = &cx18_v4l2_enc_fops;
 179         s->video_dev->release = video_device_release;
 180         s->video_dev->tvnorms = V4L2_STD_ALL;
 181         cx18_set_funcs(s->video_dev);
 182         return 0;
 183 }
 184
 185 /* Initialize v4l2 variables and register v4l2 devices */
 186 int cx18_streams_setup(struct cx18 *cx)
 187 {
 188         int type, ret;
 189
 190         /* Setup V4L2 Devices */
 191         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 192                 /* Prepare device */
 193                 ret = cx18_prep_dev(cx, type);
 194                 if (ret < 0)
 195                         break;
 196
 197                 /* Allocate Stream */
 198                 ret = cx18_stream_alloc(&cx->streams[type]);
 199                 if (ret < 0)
 200                         break;
 201         }
 202         if (type == CX18_MAX_STREAMS)
 203                 return 0;
 204
 205         /* One or more streams could not be initialized. Clean 'em all up. */
 206         cx18_streams_cleanup(cx, 0);
 207         return ret;
 208 }
 209
 210 static int cx18_reg_dev(struct cx18 *cx, int type)
 211 {
 212         struct cx18_stream *s = &cx->streams[type];
 213         int vfl_type = cx18_stream_info[type].vfl_type;
 214         int num, ret;
 215
 216         /* TODO: Shouldn't this be a VFL_TYPE_TRANSPORT or something?
 217          * We need a VFL_TYPE_TS defined.
 218          */
 219         if (strcmp("TS", s->name) == 0) {
 220                 /* just return if no DVB is supported */
 221                 if ((cx->card->hw_all & CX18_HW_DVB) == 0)
 222                         return 0;
 223                 ret = cx18_dvb_register(s);
 224                 if (ret < 0) {
 225                         CX18_ERR("DVB failed to register\n");
 226                         return ret;
 227                 }
 228         }
 229
 230         if (s->video_dev == NULL)
 231                 return 0;
 232
 233         num = s->video_dev->num;
 234         /* card number + user defined offset + device offset */
 235         if (type != CX18_ENC_STREAM_TYPE_MPG) {
 236                 struct cx18_stream *s_mpg = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
 237
 238                 if (s_mpg->video_dev)
 239                         num = s_mpg->video_dev->num
 240                             + cx18_stream_info[type].num_offset;
 241         }
 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         cx18_av_cmd(cx, VIDIOC_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                 lines = cx->is_60hz ? 24 : 38;
 364                 if (cx->is_60hz)
 365                         lines += 2;
 366         }
 367
 368         data[0] = s->handle;
 369         /* Lines per field */
 370         data[1] = (lines / 2) | ((lines / 2) << 16);
 371         /* bytes per line */
 372         data[2] = (raw ? vbi_active_samples
 373                        : (cx->is_60hz ? vbi_hblank_samples_60Hz
 374                                       : vbi_hblank_samples_50Hz));
 375         /* Every X number of frames a VBI interrupt arrives
 376            (frames as in 25 or 30 fps) */
 377         data[3] = 1;
 378         /*
 379          * Set the SAV/EAV RP codes to look for as start/stop points
 380          * when in VIP-1.1 mode
 381          */
 382         if (raw) {
 383                 /*
 384                  * Start codes for beginning of "active" line in vertical blank
 385                  * 0x20 (               VerticalBlank                )
 386                  * 0x60 (     EvenField VerticalBlank                )
 387                  */
 388                 data[4] = 0x20602060;
 389                 /*
 390                  * End codes for end of "active" raw lines and regular lines
 391                  * 0x30 (               VerticalBlank HorizontalBlank)
 392                  * 0x70 (     EvenField VerticalBlank HorizontalBlank)
 393                  * 0x90 (Task                         HorizontalBlank)
 394                  * 0xd0 (Task EvenField               HorizontalBlank)
 395                  */
 396                 data[5] = 0x307090d0;
 397         } else {
 398                 /*
 399                  * End codes for active video, we want data in the hblank region
 400                  * 0xb0 (Task         0 VerticalBlank HorizontalBlank)
 401                  * 0xf0 (Task EvenField VerticalBlank HorizontalBlank)
 402                  *
 403                  * Since the V bit is only allowed to toggle in the EAV RP code,
 404                  * just before the first active region line, these two
 405                  * are problematic and we have to ignore them:
 406                  * 0x90 (Task                         HorizontalBlank)
 407                  * 0xd0 (Task EvenField               HorizontalBlank)
 408                  */
 409                 data[4] = 0xB0F0B0F0;
 410                 /*
 411                  * Start codes for beginning of active line in vertical blank
 412                  * 0xa0 (Task           VerticalBlank                )
 413                  * 0xe0 (Task EvenField VerticalBlank                )
 414                  */
 415                 data[5] = 0xA0E0A0E0;
 416         }
 417
 418         CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
 419                         data[0], data[1], data[2], data[3], data[4], data[5]);
 420
 421         cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
 422 }
 423
 424 struct cx18_queue *cx18_stream_put_buf_fw(struct cx18_stream *s,
 425                                           struct cx18_buffer *buf)
 426 {
 427         struct cx18 *cx = s->cx;
 428         struct cx18_queue *q;
 429
 430         /* Don't give it to the firmware, if we're not running a capture */
 431         if (s->handle == CX18_INVALID_TASK_HANDLE ||
 432             !test_bit(CX18_F_S_STREAMING, &s->s_flags))
 433                 return cx18_enqueue(s, buf, &s->q_free);
 434
 435         q = cx18_enqueue(s, buf, &s->q_busy);
 436         if (q != &s->q_busy)
 437                 return q; /* The firmware has the max buffers it can handle */
 438
 439         cx18_buf_sync_for_device(s, buf);
 440         cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
 441                   (void __iomem *) &cx->scb->cpu_mdl[buf->id] - cx->enc_mem,
 442                   1, buf->id, s->buf_size);
 443         return q;
 444 }
 445
 446 void cx18_stream_load_fw_queue(struct cx18_stream *s)
 447 {
 448         struct cx18_queue *q;
 449         struct cx18_buffer *buf;
 450
 451         if (atomic_read(&s->q_free.buffers) == 0 ||
 452             atomic_read(&s->q_busy.buffers) >= CX18_MAX_FW_MDLS_PER_STREAM)
 453                 return;
 454
 455         /* Move from q_free to q_busy notifying the firmware, until the limit */
 456         do {
 457                 buf = cx18_dequeue(s, &s->q_free);
 458                 if (buf == NULL)
 459                         break;
 460                 q = cx18_stream_put_buf_fw(s, buf);
 461         } while (atomic_read(&s->q_busy.buffers) < CX18_MAX_FW_MDLS_PER_STREAM
 462                  && q == &s->q_busy);
 463 }
 464
 465 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
 466 {
 467         u32 data[MAX_MB_ARGUMENTS];
 468         struct cx18 *cx = s->cx;
 469         struct cx18_buffer *buf;
 470         int captype = 0;
 471         struct cx18_api_func_private priv;
 472
 473         if (s->video_dev == NULL && s->dvb.enabled == 0)
 474                 return -EINVAL;
 475
 476         CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
 477
 478         switch (s->type) {
 479         case CX18_ENC_STREAM_TYPE_MPG:
 480                 captype = CAPTURE_CHANNEL_TYPE_MPEG;
 481                 cx->mpg_data_received = cx->vbi_data_inserted = 0;
 482                 cx->dualwatch_jiffies = jiffies;
 483                 cx->dualwatch_stereo_mode = cx->params.audio_properties & 0x300;
 484                 cx->search_pack_header = 0;
 485                 break;
 486
 487         case CX18_ENC_STREAM_TYPE_TS:
 488                 captype = CAPTURE_CHANNEL_TYPE_TS;
 489                 break;
 490         case CX18_ENC_STREAM_TYPE_YUV:
 491                 captype = CAPTURE_CHANNEL_TYPE_YUV;
 492                 break;
 493         case CX18_ENC_STREAM_TYPE_PCM:
 494                 captype = CAPTURE_CHANNEL_TYPE_PCM;
 495                 break;
 496         case CX18_ENC_STREAM_TYPE_VBI:
 497 #ifdef CX18_ENCODER_PARSES_SLICED
 498                 captype = cx18_raw_vbi(cx) ?
 499                      CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
 500 #else
 501                 /*
 502                  * Currently we set things up so that Sliced VBI from the
 503                  * digitizer is handled as Raw VBI by the encoder
 504                  */
 505                 captype = CAPTURE_CHANNEL_TYPE_VBI;
 506 #endif
 507                 cx->vbi.frame = 0;
 508                 cx->vbi.inserted_frame = 0;
 509                 memset(cx->vbi.sliced_mpeg_size,
 510                         0, sizeof(cx->vbi.sliced_mpeg_size));
 511                 break;
 512         default:
 513                 return -EINVAL;
 514         }
 515
 516         /* Clear Streamoff flags in case left from last capture */
 517         clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
 518
 519         cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
 520         s->handle = data[0];
 521         cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
 522
 523         /*
 524          * For everything but CAPTURE_CHANNEL_TYPE_TS, play it safe and
 525          * set up all the parameters, as it is not obvious which parameters the
 526          * firmware shares across capture channel types and which it does not.
 527          *
 528          * Some of the cx18_vapi() calls below apply to only certain capture
 529          * channel types.  We're hoping there's no harm in calling most of them
 530          * anyway, as long as the values are all consistent.  Setting some
 531          * shared parameters will have no effect once an analog capture channel
 532          * has started streaming.
 533          */
 534         if (captype != CAPTURE_CHANNEL_TYPE_TS) {
 535                 cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
 536                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
 537                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
 538                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
 539
 540                 /*
 541                  * Audio related reset according to
 542                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
 543                  */
 544                 if (atomic_read(&cx->ana_capturing) == 0)
 545                         cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2,
 546                                   s->handle, 12);
 547
 548                 /*
 549                  * Number of lines for Field 1 & Field 2 according to
 550                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
 551                  * FIXME - currently we set this to 0 & 0 but things seem OK
 552                  */
 553                 cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
 554                           s->handle, cx->digitizer, cx->digitizer);
 555
 556                 if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
 557                         cx18_vbi_setup(s);
 558
 559                 /*
 560                  * assign program index info.
 561                  * Mask 7: select I/P/B, Num_req: 400 max
 562                  * FIXME - currently we have this hardcoded as disabled
 563                  */
 564                 cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 1, 0);
 565
 566                 /* Call out to the common CX2341x API setup for user controls */
 567                 priv.cx = cx;
 568                 priv.s = s;
 569                 cx2341x_update(&priv, cx18_api_func, NULL, &cx->params);
 570
 571                 /*
 572                  * When starting a capture and we're set for radio,
 573                  * ensure the video is muted, despite the user control.
 574                  */
 575                 if (!cx->params.video_mute &&
 576                     test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
 577                         cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
 578                                   (cx->params.video_mute_yuv << 8) | 1);
 579         }
 580
 581         if (atomic_read(&cx->tot_capturing) == 0) {
 582                 clear_bit(CX18_F_I_EOS, &cx->i_flags);
 583                 cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
 584         }
 585
 586         cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
 587                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
 588                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
 589
 590         /* Init all the cpu_mdls for this stream */
 591         cx18_flush_queues(s);
 592         mutex_lock(&s->qlock);
 593         list_for_each_entry(buf, &s->q_free.list, list) {
 594                 cx18_writel(cx, buf->dma_handle,
 595                                         &cx->scb->cpu_mdl[buf->id].paddr);
 596                 cx18_writel(cx, s->buf_size, &cx->scb->cpu_mdl[buf->id].length);
 597         }
 598         mutex_unlock(&s->qlock);
 599         cx18_stream_load_fw_queue(s);
 600
 601         /* begin_capture */
 602         if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
 603                 CX18_DEBUG_WARN("Error starting capture!\n");
 604                 /* Ensure we're really not capturing before releasing MDLs */
 605                 if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 606                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
 607                 else
 608                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 609                 clear_bit(CX18_F_S_STREAMING, &s->s_flags);
 610                 /* FIXME - CX18_F_S_STREAMOFF as well? */
 611                 cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 612                 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 613                 s->handle = CX18_INVALID_TASK_HANDLE;
 614                 if (atomic_read(&cx->tot_capturing) == 0) {
 615                         set_bit(CX18_F_I_EOS, &cx->i_flags);
 616                         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
 617                 }
 618                 return -EINVAL;
 619         }
 620
 621         /* you're live! sit back and await interrupts :) */
 622         if (captype != CAPTURE_CHANNEL_TYPE_TS)
 623                 atomic_inc(&cx->ana_capturing);
 624         atomic_inc(&cx->tot_capturing);
 625         return 0;
 626 }
 627
 628 void cx18_stop_all_captures(struct cx18 *cx)
 629 {
 630         int i;
 631
 632         for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
 633                 struct cx18_stream *s = &cx->streams[i];
 634
 635                 if (s->video_dev == NULL && s->dvb.enabled == 0)
 636                         continue;
 637                 if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
 638                         cx18_stop_v4l2_encode_stream(s, 0);
 639         }
 640 }
 641
 642 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
 643 {
 644         struct cx18 *cx = s->cx;
 645         unsigned long then;
 646
 647         if (s->video_dev == NULL && s->dvb.enabled == 0)
 648                 return -EINVAL;
 649
 650         /* This function assumes that you are allowed to stop the capture
 651            and that we are actually capturing */
 652
 653         CX18_DEBUG_INFO("Stop Capture\n");
 654
 655         if (atomic_read(&cx->tot_capturing) == 0)
 656                 return 0;
 657
 658         if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 659                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
 660         else
 661                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 662
 663         then = jiffies;
 664
 665         if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
 666                 CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
 667         }
 668
 669         if (s->type != CX18_ENC_STREAM_TYPE_TS)
 670                 atomic_dec(&cx->ana_capturing);
 671         atomic_dec(&cx->tot_capturing);
 672
 673         /* Clear capture and no-read bits */
 674         clear_bit(CX18_F_S_STREAMING, &s->s_flags);
 675
 676         /* Tell the CX23418 it can't use our buffers anymore */
 677         cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 678
 679         cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 680         s->handle = CX18_INVALID_TASK_HANDLE;
 681
 682         if (atomic_read(&cx->tot_capturing) > 0)
 683                 return 0;
 684
 685         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
 686         wake_up(&s->waitq);
 687
 688         return 0;
 689 }
 690
 691 u32 cx18_find_handle(struct cx18 *cx)
 692 {
 693         int i;
 694
 695         /* find first available handle to be used for global settings */
 696         for (i = 0; i < CX18_MAX_STREAMS; i++) {
 697                 struct cx18_stream *s = &cx->streams[i];
 698
 699                 if (s->video_dev && (s->handle != CX18_INVALID_TASK_HANDLE))
 700                         return s->handle;
 701         }
 702         return CX18_INVALID_TASK_HANDLE;
 703 }
 704
 705 struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle)
 706 {
 707         int i;
 708         struct cx18_stream *s;
 709
 710         if (handle == CX18_INVALID_TASK_HANDLE)
 711                 return NULL;
 712
 713         for (i = 0; i < CX18_MAX_STREAMS; i++) {
 714                 s = &cx->streams[i];
 715                 if (s->handle != handle)
 716                         continue;
 717                 if (s->video_dev || s->dvb.enabled)
 718                         return s;
 719         }
 720         return NULL;
 721 }