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         INIT_LIST_HEAD(&s->buf_pool);
 119         s->bufs_per_mdl = 1;
 120         s->mdl_size = s->buf_size * s->bufs_per_mdl;
 121
 122         init_waitqueue_head(&s->waitq);
 123         s->id = -1;
 124         spin_lock_init(&s->q_free.lock);
 125         cx18_queue_init(&s->q_free);
 126         spin_lock_init(&s->q_busy.lock);
 127         cx18_queue_init(&s->q_busy);
 128         spin_lock_init(&s->q_full.lock);
 129         cx18_queue_init(&s->q_full);
 130         spin_lock_init(&s->q_idle.lock);
 131         cx18_queue_init(&s->q_idle);
 132
 133         INIT_WORK(&s->out_work_order, cx18_out_work_handler);
 134 }
 135
 136 static int cx18_prep_dev(struct cx18 *cx, int type)
 137 {
 138         struct cx18_stream *s = &cx->streams[type];
 139         u32 cap = cx->v4l2_cap;
 140         int num_offset = cx18_stream_info[type].num_offset;
 141         int num = cx->instance + cx18_first_minor + num_offset;
 142
 143         /* These four fields are always initialized. If video_dev == NULL, then
 144            this stream is not in use. In that case no other fields but these
 145            four can be used. */
 146         s->video_dev = NULL;
 147         s->cx = cx;
 148         s->type = type;
 149         s->name = cx18_stream_info[type].name;
 150
 151         /* Check whether the radio is supported */
 152         if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
 153                 return 0;
 154
 155         /* Check whether VBI is supported */
 156         if (type == CX18_ENC_STREAM_TYPE_VBI &&
 157             !(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
 158                 return 0;
 159
 160         /* User explicitly selected 0 buffers for these streams, so don't
 161            create them. */
 162         if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
 163             cx->stream_buffers[type] == 0) {
 164                 CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
 165                 return 0;
 166         }
 167
 168         cx18_stream_init(cx, type);
 169
 170         if (num_offset == -1)
 171                 return 0;
 172
 173         /* allocate and initialize the v4l2 video device structure */
 174         s->video_dev = video_device_alloc();
 175         if (s->video_dev == NULL) {
 176                 CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
 177                                 s->name);
 178                 return -ENOMEM;
 179         }
 180
 181         snprintf(s->video_dev->name, sizeof(s->video_dev->name), "%s %s",
 182                  cx->v4l2_dev.name, s->name);
 183
 184         s->video_dev->num = num;
 185         s->video_dev->v4l2_dev = &cx->v4l2_dev;
 186         s->video_dev->fops = &cx18_v4l2_enc_fops;
 187         s->video_dev->release = video_device_release;
 188         s->video_dev->tvnorms = V4L2_STD_ALL;
 189         cx18_set_funcs(s->video_dev);
 190         return 0;
 191 }
 192
 193 /* Initialize v4l2 variables and register v4l2 devices */
 194 int cx18_streams_setup(struct cx18 *cx)
 195 {
 196         int type, ret;
 197
 198         /* Setup V4L2 Devices */
 199         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 200                 /* Prepare device */
 201                 ret = cx18_prep_dev(cx, type);
 202                 if (ret < 0)
 203                         break;
 204
 205                 /* Allocate Stream */
 206                 ret = cx18_stream_alloc(&cx->streams[type]);
 207                 if (ret < 0)
 208                         break;
 209         }
 210         if (type == CX18_MAX_STREAMS)
 211                 return 0;
 212
 213         /* One or more streams could not be initialized. Clean 'em all up. */
 214         cx18_streams_cleanup(cx, 0);
 215         return ret;
 216 }
 217
 218 static int cx18_reg_dev(struct cx18 *cx, int type)
 219 {
 220         struct cx18_stream *s = &cx->streams[type];
 221         int vfl_type = cx18_stream_info[type].vfl_type;
 222         const char *name;
 223         int num, ret;
 224
 225         /* TODO: Shouldn't this be a VFL_TYPE_TRANSPORT or something?
 226          * We need a VFL_TYPE_TS defined.
 227          */
 228         if (strcmp("TS", s->name) == 0) {
 229                 /* just return if no DVB is supported */
 230                 if ((cx->card->hw_all & CX18_HW_DVB) == 0)
 231                         return 0;
 232                 ret = cx18_dvb_register(s);
 233                 if (ret < 0) {
 234                         CX18_ERR("DVB failed to register\n");
 235                         return ret;
 236                 }
 237         }
 238
 239         if (s->video_dev == NULL)
 240                 return 0;
 241
 242         num = s->video_dev->num;
 243         /* card number + user defined offset + device offset */
 244         if (type != CX18_ENC_STREAM_TYPE_MPG) {
 245                 struct cx18_stream *s_mpg = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
 246
 247                 if (s_mpg->video_dev)
 248                         num = s_mpg->video_dev->num
 249                             + cx18_stream_info[type].num_offset;
 250         }
 251         video_set_drvdata(s->video_dev, s);
 252
 253         /* Register device. First try the desired minor, then any free one. */
 254         ret = video_register_device_no_warn(s->video_dev, vfl_type, num);
 255         if (ret < 0) {
 256                 CX18_ERR("Couldn't register v4l2 device for %s (device node number %d)\n",
 257                         s->name, num);
 258                 video_device_release(s->video_dev);
 259                 s->video_dev = NULL;
 260                 return ret;
 261         }
 262
 263         name = video_device_node_name(s->video_dev);
 264
 265         switch (vfl_type) {
 266         case VFL_TYPE_GRABBER:
 267                 CX18_INFO("Registered device %s for %s (%d x %d.%02d kB)\n",
 268                           name, s->name, cx->stream_buffers[type],
 269                           cx->stream_buf_size[type] / 1024,
 270                           (cx->stream_buf_size[type] * 100 / 1024) % 100);
 271                 break;
 272
 273         case VFL_TYPE_RADIO:
 274                 CX18_INFO("Registered device %s for %s\n", name, s->name);
 275                 break;
 276
 277         case VFL_TYPE_VBI:
 278                 if (cx->stream_buffers[type])
 279                         CX18_INFO("Registered device %s for %s "
 280                                   "(%d x %d bytes)\n",
 281                                   name, s->name, cx->stream_buffers[type],
 282                                   cx->stream_buf_size[type]);
 283                 else
 284                         CX18_INFO("Registered device %s for %s\n",
 285                                 name, s->name);
 286                 break;
 287         }
 288
 289         return 0;
 290 }
 291
 292 /* Register v4l2 devices */
 293 int cx18_streams_register(struct cx18 *cx)
 294 {
 295         int type;
 296         int err;
 297         int ret = 0;
 298
 299         /* Register V4L2 devices */
 300         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 301                 err = cx18_reg_dev(cx, type);
 302                 if (err && ret == 0)
 303                         ret = err;
 304         }
 305
 306         if (ret == 0)
 307                 return 0;
 308
 309         /* One or more streams could not be initialized. Clean 'em all up. */
 310         cx18_streams_cleanup(cx, 1);
 311         return ret;
 312 }
 313
 314 /* Unregister v4l2 devices */
 315 void cx18_streams_cleanup(struct cx18 *cx, int unregister)
 316 {
 317         struct video_device *vdev;
 318         int type;
 319
 320         /* Teardown all streams */
 321         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 322
 323                 /* No struct video_device, but can have buffers allocated */
 324                 if (type == CX18_ENC_STREAM_TYPE_TS) {
 325                         if (cx->streams[type].dvb.enabled) {
 326                                 cx18_dvb_unregister(&cx->streams[type]);
 327                                 cx->streams[type].dvb.enabled = false;
 328                                 cx18_stream_free(&cx->streams[type]);
 329                         }
 330                         continue;
 331                 }
 332
 333                 /* No struct video_device, but can have buffers allocated */
 334                 if (type == CX18_ENC_STREAM_TYPE_IDX) {
 335                         if (cx->stream_buffers[type] != 0) {
 336                                 cx->stream_buffers[type] = 0;
 337                                 cx18_stream_free(&cx->streams[type]);
 338                         }
 339                         continue;
 340                 }
 341
 342                 /* If struct video_device exists, can have buffers allocated */
 343                 vdev = cx->streams[type].video_dev;
 344
 345                 cx->streams[type].video_dev = NULL;
 346                 if (vdev == NULL)
 347                         continue;
 348
 349                 cx18_stream_free(&cx->streams[type]);
 350
 351                 /* Unregister or release device */
 352                 if (unregister)
 353                         video_unregister_device(vdev);
 354                 else
 355                         video_device_release(vdev);
 356         }
 357 }
 358
 359 static void cx18_vbi_setup(struct cx18_stream *s)
 360 {
 361         struct cx18 *cx = s->cx;
 362         int raw = cx18_raw_vbi(cx);
 363         u32 data[CX2341X_MBOX_MAX_DATA];
 364         int lines;
 365
 366         if (cx->is_60hz) {
 367                 cx->vbi.count = 12;
 368                 cx->vbi.start[0] = 10;
 369                 cx->vbi.start[1] = 273;
 370         } else {        /* PAL/SECAM */
 371                 cx->vbi.count = 18;
 372                 cx->vbi.start[0] = 6;
 373                 cx->vbi.start[1] = 318;
 374         }
 375
 376         /* setup VBI registers */
 377         v4l2_subdev_call(cx->sd_av, video, s_fmt, &cx->vbi.in);
 378
 379         /*
 380          * Send the CX18_CPU_SET_RAW_VBI_PARAM API command to setup Encoder Raw
 381          * VBI when the first analog capture channel starts, as once it starts
 382          * (e.g. MPEG), we can't effect any change in the Encoder Raw VBI setup
 383          * (i.e. for the VBI capture channels).  We also send it for each
 384          * analog capture channel anyway just to make sure we get the proper
 385          * behavior
 386          */
 387         if (raw) {
 388                 lines = cx->vbi.count * 2;
 389         } else {
 390                 /*
 391                  * For 525/60 systems, according to the VIP 2 & BT.656 std:
 392                  * The EAV RP code's Field bit toggles on line 4, a few lines
 393                  * after the Vertcal Blank bit has already toggled.
 394                  * Tell the encoder to capture 21-4+1=18 lines per field,
 395                  * since we want lines 10 through 21.
 396                  *
 397                  * For 625/50 systems, according to the VIP 2 & BT.656 std:
 398                  * The EAV RP code's Field bit toggles on line 1, a few lines
 399                  * after the Vertcal Blank bit has already toggled.
 400                  * (We've actually set the digitizer so that the Field bit
 401                  * toggles on line 2.) Tell the encoder to capture 23-2+1=22
 402                  * lines per field, since we want lines 6 through 23.
 403                  */
 404                 lines = cx->is_60hz ? (21 - 4 + 1) * 2 : (23 - 2 + 1) * 2;
 405         }
 406
 407         data[0] = s->handle;
 408         /* Lines per field */
 409         data[1] = (lines / 2) | ((lines / 2) << 16);
 410         /* bytes per line */
 411         data[2] = (raw ? vbi_active_samples
 412                        : (cx->is_60hz ? vbi_hblank_samples_60Hz
 413                                       : vbi_hblank_samples_50Hz));
 414         /* Every X number of frames a VBI interrupt arrives
 415            (frames as in 25 or 30 fps) */
 416         data[3] = 1;
 417         /*
 418          * Set the SAV/EAV RP codes to look for as start/stop points
 419          * when in VIP-1.1 mode
 420          */
 421         if (raw) {
 422                 /*
 423                  * Start codes for beginning of "active" line in vertical blank
 424                  * 0x20 (               VerticalBlank                )
 425                  * 0x60 (     EvenField VerticalBlank                )
 426                  */
 427                 data[4] = 0x20602060;
 428                 /*
 429                  * End codes for end of "active" raw lines and regular lines
 430                  * 0x30 (               VerticalBlank HorizontalBlank)
 431                  * 0x70 (     EvenField VerticalBlank HorizontalBlank)
 432                  * 0x90 (Task                         HorizontalBlank)
 433                  * 0xd0 (Task EvenField               HorizontalBlank)
 434                  */
 435                 data[5] = 0x307090d0;
 436         } else {
 437                 /*
 438                  * End codes for active video, we want data in the hblank region
 439                  * 0xb0 (Task         0 VerticalBlank HorizontalBlank)
 440                  * 0xf0 (Task EvenField VerticalBlank HorizontalBlank)
 441                  *
 442                  * Since the V bit is only allowed to toggle in the EAV RP code,
 443                  * just before the first active region line, these two
 444                  * are problematic:
 445                  * 0x90 (Task                         HorizontalBlank)
 446                  * 0xd0 (Task EvenField               HorizontalBlank)
 447                  *
 448                  * We have set the digitzer such that we don't have to worry
 449                  * about these problem codes.
 450                  */
 451                 data[4] = 0xB0F0B0F0;
 452                 /*
 453                  * Start codes for beginning of active line in vertical blank
 454                  * 0xa0 (Task           VerticalBlank                )
 455                  * 0xe0 (Task EvenField VerticalBlank                )
 456                  */
 457                 data[5] = 0xA0E0A0E0;
 458         }
 459
 460         CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
 461                         data[0], data[1], data[2], data[3], data[4], data[5]);
 462
 463         cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
 464 }
 465
 466 void cx18_stream_rotate_idx_mdls(struct cx18 *cx)
 467 {
 468         struct cx18_stream *s = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
 469         struct cx18_mdl *mdl;
 470
 471         if (!cx18_stream_enabled(s))
 472                 return;
 473
 474         /* Return if the firmware is not running low on MDLs */
 475         if ((atomic_read(&s->q_free.depth) + atomic_read(&s->q_busy.depth)) >=
 476                                             CX18_ENC_STREAM_TYPE_IDX_FW_MDL_MIN)
 477                 return;
 478
 479         /* Return if there are no MDLs to rotate back to the firmware */
 480         if (atomic_read(&s->q_full.depth) < 2)
 481                 return;
 482
 483         /*
 484          * Take the oldest IDX MDL still holding data, and discard its index
 485          * entries by scheduling the MDL to go back to the firmware
 486          */
 487         mdl = cx18_dequeue(s, &s->q_full);
 488         if (mdl != NULL)
 489                 cx18_enqueue(s, mdl, &s->q_free);
 490 }
 491
 492 static
 493 struct cx18_queue *_cx18_stream_put_mdl_fw(struct cx18_stream *s,
 494                                            struct cx18_mdl *mdl)
 495 {
 496         struct cx18 *cx = s->cx;
 497         struct cx18_queue *q;
 498
 499         /* Don't give it to the firmware, if we're not running a capture */
 500         if (s->handle == CX18_INVALID_TASK_HANDLE ||
 501             test_bit(CX18_F_S_STOPPING, &s->s_flags) ||
 502             !test_bit(CX18_F_S_STREAMING, &s->s_flags))
 503                 return cx18_enqueue(s, mdl, &s->q_free);
 504
 505         q = cx18_enqueue(s, mdl, &s->q_busy);
 506         if (q != &s->q_busy)
 507                 return q; /* The firmware has the max MDLs it can handle */
 508
 509         cx18_mdl_sync_for_device(s, mdl);
 510         cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
 511                   (void __iomem *) &cx->scb->cpu_mdl[mdl->id] - cx->enc_mem,
 512                   s->bufs_per_mdl, mdl->id, s->mdl_size);
 513         return q;
 514 }
 515
 516 static
 517 void _cx18_stream_load_fw_queue(struct cx18_stream *s)
 518 {
 519         struct cx18_queue *q;
 520         struct cx18_mdl *mdl;
 521
 522         if (atomic_read(&s->q_free.depth) == 0 ||
 523             atomic_read(&s->q_busy.depth) >= CX18_MAX_FW_MDLS_PER_STREAM)
 524                 return;
 525
 526         /* Move from q_free to q_busy notifying the firmware, until the limit */
 527         do {
 528                 mdl = cx18_dequeue(s, &s->q_free);
 529                 if (mdl == NULL)
 530                         break;
 531                 q = _cx18_stream_put_mdl_fw(s, mdl);
 532         } while (atomic_read(&s->q_busy.depth) < CX18_MAX_FW_MDLS_PER_STREAM
 533                  && q == &s->q_busy);
 534 }
 535
 536 void cx18_out_work_handler(struct work_struct *work)
 537 {
 538         struct cx18_stream *s =
 539                          container_of(work, struct cx18_stream, out_work_order);
 540
 541         _cx18_stream_load_fw_queue(s);
 542 }
 543
 544 static void cx18_stream_configure_mdls(struct cx18_stream *s)
 545 {
 546         cx18_unload_queues(s);
 547
 548         switch (s->type) {
 549         case CX18_ENC_STREAM_TYPE_YUV:
 550                 /*
 551                  * Height should be a multiple of 32 lines.
 552                  * Set the MDL size to the exact size needed for one frame.
 553                  * Use enough buffers per MDL to cover the MDL size
 554                  */
 555                 s->mdl_size = 720 * s->cx->params.height * 3 / 2;
 556                 s->bufs_per_mdl = s->mdl_size / s->buf_size;
 557                 if (s->mdl_size % s->buf_size)
 558                         s->bufs_per_mdl++;
 559                 break;
 560         case CX18_ENC_STREAM_TYPE_VBI:
 561                 s->bufs_per_mdl = 1;
 562                 if  (cx18_raw_vbi(s->cx)) {
 563                         s->mdl_size = (s->cx->is_60hz ? 12 : 18)
 564                                                        * 2 * vbi_active_samples;
 565                 } else {
 566                         /*
 567                          * See comment in cx18_vbi_setup() below about the
 568                          * extra lines we capture in sliced VBI mode due to
 569                          * the lines on which EAV RP codes toggle.
 570                         */
 571                         s->mdl_size = s->cx->is_60hz
 572                                    ? (21 - 4 + 1) * 2 * vbi_hblank_samples_60Hz
 573                                    : (23 - 2 + 1) * 2 * vbi_hblank_samples_50Hz;
 574                 }
 575                 break;
 576         default:
 577                 s->bufs_per_mdl = 1;
 578                 s->mdl_size = s->buf_size * s->bufs_per_mdl;
 579                 break;
 580         }
 581
 582         cx18_load_queues(s);
 583 }
 584
 585 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
 586 {
 587         u32 data[MAX_MB_ARGUMENTS];
 588         struct cx18 *cx = s->cx;
 589         int captype = 0;
 590         struct cx18_api_func_private priv;
 591         struct cx18_stream *s_idx;
 592
 593         if (!cx18_stream_enabled(s))
 594                 return -EINVAL;
 595
 596         CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
 597
 598         switch (s->type) {
 599         case CX18_ENC_STREAM_TYPE_MPG:
 600                 captype = CAPTURE_CHANNEL_TYPE_MPEG;
 601                 cx->mpg_data_received = cx->vbi_data_inserted = 0;
 602                 cx->dualwatch_jiffies = jiffies;
 603                 cx->dualwatch_stereo_mode = cx->params.audio_properties & 0x300;
 604                 cx->search_pack_header = 0;
 605                 break;
 606
 607         case CX18_ENC_STREAM_TYPE_IDX:
 608                 captype = CAPTURE_CHANNEL_TYPE_INDEX;
 609                 break;
 610         case CX18_ENC_STREAM_TYPE_TS:
 611                 captype = CAPTURE_CHANNEL_TYPE_TS;
 612                 break;
 613         case CX18_ENC_STREAM_TYPE_YUV:
 614                 captype = CAPTURE_CHANNEL_TYPE_YUV;
 615                 break;
 616         case CX18_ENC_STREAM_TYPE_PCM:
 617                 captype = CAPTURE_CHANNEL_TYPE_PCM;
 618                 break;
 619         case CX18_ENC_STREAM_TYPE_VBI:
 620 #ifdef CX18_ENCODER_PARSES_SLICED
 621                 captype = cx18_raw_vbi(cx) ?
 622                      CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
 623 #else
 624                 /*
 625                  * Currently we set things up so that Sliced VBI from the
 626                  * digitizer is handled as Raw VBI by the encoder
 627                  */
 628                 captype = CAPTURE_CHANNEL_TYPE_VBI;
 629 #endif
 630                 cx->vbi.frame = 0;
 631                 cx->vbi.inserted_frame = 0;
 632                 memset(cx->vbi.sliced_mpeg_size,
 633                         0, sizeof(cx->vbi.sliced_mpeg_size));
 634                 break;
 635         default:
 636                 return -EINVAL;
 637         }
 638
 639         /* Clear Streamoff flags in case left from last capture */
 640         clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
 641
 642         cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
 643         s->handle = data[0];
 644         cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
 645
 646         /*
 647          * For everything but CAPTURE_CHANNEL_TYPE_TS, play it safe and
 648          * set up all the parameters, as it is not obvious which parameters the
 649          * firmware shares across capture channel types and which it does not.
 650          *
 651          * Some of the cx18_vapi() calls below apply to only certain capture
 652          * channel types.  We're hoping there's no harm in calling most of them
 653          * anyway, as long as the values are all consistent.  Setting some
 654          * shared parameters will have no effect once an analog capture channel
 655          * has started streaming.
 656          */
 657         if (captype != CAPTURE_CHANNEL_TYPE_TS) {
 658                 cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
 659                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
 660                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
 661                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
 662
 663                 /*
 664                  * Audio related reset according to
 665                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
 666                  */
 667                 if (atomic_read(&cx->ana_capturing) == 0)
 668                         cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2,
 669                                   s->handle, 12);
 670
 671                 /*
 672                  * Number of lines for Field 1 & Field 2 according to
 673                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
 674                  * Field 1 is 312 for 625 line systems in BT.656
 675                  * Field 2 is 313 for 625 line systems in BT.656
 676                  */
 677                 cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
 678                           s->handle, 312, 313);
 679
 680                 if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
 681                         cx18_vbi_setup(s);
 682
 683                 /*
 684                  * Select to receive I, P, and B frame index entries, if the
 685                  * index stream is enabled.  Otherwise disable index entry
 686                  * generation.
 687                  */
 688                 s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
 689                 cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 2,
 690                                  s->handle, cx18_stream_enabled(s_idx) ? 7 : 0);
 691
 692                 /* Call out to the common CX2341x API setup for user controls */
 693                 priv.cx = cx;
 694                 priv.s = s;
 695                 cx2341x_update(&priv, cx18_api_func, NULL, &cx->params);
 696
 697                 /*
 698                  * When starting a capture and we're set for radio,
 699                  * ensure the video is muted, despite the user control.
 700                  */
 701                 if (!cx->params.video_mute &&
 702                     test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
 703                         cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
 704                                   (cx->params.video_mute_yuv << 8) | 1);
 705         }
 706
 707         if (atomic_read(&cx->tot_capturing) == 0) {
 708                 clear_bit(CX18_F_I_EOS, &cx->i_flags);
 709                 cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
 710         }
 711
 712         cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
 713                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
 714                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
 715
 716         /* Init all the cpu_mdls for this stream */
 717         cx18_stream_configure_mdls(s);
 718         _cx18_stream_load_fw_queue(s);
 719
 720         /* begin_capture */
 721         if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
 722                 CX18_DEBUG_WARN("Error starting capture!\n");
 723                 /* Ensure we're really not capturing before releasing MDLs */
 724                 set_bit(CX18_F_S_STOPPING, &s->s_flags);
 725                 if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 726                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
 727                 else
 728                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 729                 clear_bit(CX18_F_S_STREAMING, &s->s_flags);
 730                 /* FIXME - CX18_F_S_STREAMOFF as well? */
 731                 cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 732                 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 733                 s->handle = CX18_INVALID_TASK_HANDLE;
 734                 clear_bit(CX18_F_S_STOPPING, &s->s_flags);
 735                 if (atomic_read(&cx->tot_capturing) == 0) {
 736                         set_bit(CX18_F_I_EOS, &cx->i_flags);
 737                         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
 738                 }
 739                 return -EINVAL;
 740         }
 741
 742         /* you're live! sit back and await interrupts :) */
 743         if (captype != CAPTURE_CHANNEL_TYPE_TS)
 744                 atomic_inc(&cx->ana_capturing);
 745         atomic_inc(&cx->tot_capturing);
 746         return 0;
 747 }
 748 EXPORT_SYMBOL(cx18_start_v4l2_encode_stream);
 749
 750 void cx18_stop_all_captures(struct cx18 *cx)
 751 {
 752         int i;
 753
 754         for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
 755                 struct cx18_stream *s = &cx->streams[i];
 756
 757                 if (!cx18_stream_enabled(s))
 758                         continue;
 759                 if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
 760                         cx18_stop_v4l2_encode_stream(s, 0);
 761         }
 762 }
 763
 764 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
 765 {
 766         struct cx18 *cx = s->cx;
 767         unsigned long then;
 768
 769         if (!cx18_stream_enabled(s))
 770                 return -EINVAL;
 771
 772         /* This function assumes that you are allowed to stop the capture
 773            and that we are actually capturing */
 774
 775         CX18_DEBUG_INFO("Stop Capture\n");
 776
 777         if (atomic_read(&cx->tot_capturing) == 0)
 778                 return 0;
 779
 780         set_bit(CX18_F_S_STOPPING, &s->s_flags);
 781         if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 782                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
 783         else
 784                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 785
 786         then = jiffies;
 787
 788         if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
 789                 CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
 790         }
 791
 792         if (s->type != CX18_ENC_STREAM_TYPE_TS)
 793                 atomic_dec(&cx->ana_capturing);
 794         atomic_dec(&cx->tot_capturing);
 795
 796         /* Clear capture and no-read bits */
 797         clear_bit(CX18_F_S_STREAMING, &s->s_flags);
 798
 799         /* Tell the CX23418 it can't use our buffers anymore */
 800         cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 801
 802         cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 803         s->handle = CX18_INVALID_TASK_HANDLE;
 804         clear_bit(CX18_F_S_STOPPING, &s->s_flags);
 805
 806         if (atomic_read(&cx->tot_capturing) > 0)
 807                 return 0;
 808
 809         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
 810         wake_up(&s->waitq);
 811
 812         return 0;
 813 }
 814 EXPORT_SYMBOL(cx18_stop_v4l2_encode_stream);
 815
 816 u32 cx18_find_handle(struct cx18 *cx)
 817 {
 818         int i;
 819
 820         /* find first available handle to be used for global settings */
 821         for (i = 0; i < CX18_MAX_STREAMS; i++) {
 822                 struct cx18_stream *s = &cx->streams[i];
 823
 824                 if (s->video_dev && (s->handle != CX18_INVALID_TASK_HANDLE))
 825                         return s->handle;
 826         }
 827         return CX18_INVALID_TASK_HANDLE;
 828 }
 829
 830 struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle)
 831 {
 832         int i;
 833         struct cx18_stream *s;
 834
 835         if (handle == CX18_INVALID_TASK_HANDLE)
 836                 return NULL;
 837
 838         for (i = 0; i < CX18_MAX_STREAMS; i++) {
 839                 s = &cx->streams[i];
 840                 if (s->handle != handle)
 841                         continue;
 842                 if (cx18_stream_enabled(s))
 843                         return s;
 844         }
 845         return NULL;
 846 }