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@md.metrocast.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         .unlocked_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->dvb = NULL;
 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         INIT_LIST_HEAD(&s->buf_pool);
 120         s->bufs_per_mdl = 1;
 121         s->mdl_size = s->buf_size * s->bufs_per_mdl;
 122
 123         init_waitqueue_head(&s->waitq);
 124         s->id = -1;
 125         spin_lock_init(&s->q_free.lock);
 126         cx18_queue_init(&s->q_free);
 127         spin_lock_init(&s->q_busy.lock);
 128         cx18_queue_init(&s->q_busy);
 129         spin_lock_init(&s->q_full.lock);
 130         cx18_queue_init(&s->q_full);
 131         spin_lock_init(&s->q_idle.lock);
 132         cx18_queue_init(&s->q_idle);
 133
 134         INIT_WORK(&s->out_work_order, cx18_out_work_handler);
 135 }
 136
 137 static int cx18_prep_dev(struct cx18 *cx, int type)
 138 {
 139         struct cx18_stream *s = &cx->streams[type];
 140         u32 cap = cx->v4l2_cap;
 141         int num_offset = cx18_stream_info[type].num_offset;
 142         int num = cx->instance + cx18_first_minor + num_offset;
 143
 144         /*
 145          * These five fields are always initialized.
 146          * For analog capture related streams, if video_dev == NULL then the
 147          * stream is not in use.
 148          * For the TS stream, if dvb == NULL then the stream is not in use.
 149          * In those cases no other fields but these four can be used.
 150          */
 151         s->video_dev = NULL;
 152         s->dvb = NULL;
 153         s->cx = cx;
 154         s->type = type;
 155         s->name = cx18_stream_info[type].name;
 156
 157         /* Check whether the radio is supported */
 158         if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
 159                 return 0;
 160
 161         /* Check whether VBI is supported */
 162         if (type == CX18_ENC_STREAM_TYPE_VBI &&
 163             !(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
 164                 return 0;
 165
 166         /* User explicitly selected 0 buffers for these streams, so don't
 167            create them. */
 168         if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
 169             cx->stream_buffers[type] == 0) {
 170                 CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
 171                 return 0;
 172         }
 173
 174         cx18_stream_init(cx, type);
 175
 176         /* Allocate the cx18_dvb struct only for the TS on cards with DTV */
 177         if (type == CX18_ENC_STREAM_TYPE_TS) {
 178                 if (cx->card->hw_all & CX18_HW_DVB) {
 179                         s->dvb = kzalloc(sizeof(struct cx18_dvb), GFP_KERNEL);
 180                         if (s->dvb == NULL) {
 181                                 CX18_ERR("Couldn't allocate cx18_dvb structure"
 182                                          " for %s\n", s->name);
 183                                 return -ENOMEM;
 184                         }
 185                 } else {
 186                         /* Don't need buffers for the TS, if there is no DVB */
 187                         s->buffers = 0;
 188                 }
 189         }
 190
 191         if (num_offset == -1)
 192                 return 0;
 193
 194         /* allocate and initialize the v4l2 video device structure */
 195         s->video_dev = video_device_alloc();
 196         if (s->video_dev == NULL) {
 197                 CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
 198                                 s->name);
 199                 return -ENOMEM;
 200         }
 201
 202         snprintf(s->video_dev->name, sizeof(s->video_dev->name), "%s %s",
 203                  cx->v4l2_dev.name, s->name);
 204
 205         s->video_dev->num = num;
 206         s->video_dev->v4l2_dev = &cx->v4l2_dev;
 207         s->video_dev->fops = &cx18_v4l2_enc_fops;
 208         s->video_dev->release = video_device_release;
 209         s->video_dev->tvnorms = V4L2_STD_ALL;
 210         set_bit(V4L2_FL_USE_FH_PRIO, &s->video_dev->flags);
 211         cx18_set_funcs(s->video_dev);
 212         return 0;
 213 }
 214
 215 /* Initialize v4l2 variables and register v4l2 devices */
 216 int cx18_streams_setup(struct cx18 *cx)
 217 {
 218         int type, ret;
 219
 220         /* Setup V4L2 Devices */
 221         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 222                 /* Prepare device */
 223                 ret = cx18_prep_dev(cx, type);
 224                 if (ret < 0)
 225                         break;
 226
 227                 /* Allocate Stream */
 228                 ret = cx18_stream_alloc(&cx->streams[type]);
 229                 if (ret < 0)
 230                         break;
 231         }
 232         if (type == CX18_MAX_STREAMS)
 233                 return 0;
 234
 235         /* One or more streams could not be initialized. Clean 'em all up. */
 236         cx18_streams_cleanup(cx, 0);
 237         return ret;
 238 }
 239
 240 static int cx18_reg_dev(struct cx18 *cx, int type)
 241 {
 242         struct cx18_stream *s = &cx->streams[type];
 243         int vfl_type = cx18_stream_info[type].vfl_type;
 244         const char *name;
 245         int num, ret;
 246
 247         if (type == CX18_ENC_STREAM_TYPE_TS && s->dvb != NULL) {
 248                 ret = cx18_dvb_register(s);
 249                 if (ret < 0) {
 250                         CX18_ERR("DVB failed to register\n");
 251                         return ret;
 252                 }
 253         }
 254
 255         if (s->video_dev == NULL)
 256                 return 0;
 257
 258         num = s->video_dev->num;
 259         /* card number + user defined offset + device offset */
 260         if (type != CX18_ENC_STREAM_TYPE_MPG) {
 261                 struct cx18_stream *s_mpg = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
 262
 263                 if (s_mpg->video_dev)
 264                         num = s_mpg->video_dev->num
 265                             + cx18_stream_info[type].num_offset;
 266         }
 267         video_set_drvdata(s->video_dev, s);
 268
 269         /* Register device. First try the desired minor, then any free one. */
 270         ret = video_register_device_no_warn(s->video_dev, vfl_type, num);
 271         if (ret < 0) {
 272                 CX18_ERR("Couldn't register v4l2 device for %s (device node number %d)\n",
 273                         s->name, num);
 274                 video_device_release(s->video_dev);
 275                 s->video_dev = NULL;
 276                 return ret;
 277         }
 278
 279         name = video_device_node_name(s->video_dev);
 280
 281         switch (vfl_type) {
 282         case VFL_TYPE_GRABBER:
 283                 CX18_INFO("Registered device %s for %s (%d x %d.%02d kB)\n",
 284                           name, s->name, cx->stream_buffers[type],
 285                           cx->stream_buf_size[type] / 1024,
 286                           (cx->stream_buf_size[type] * 100 / 1024) % 100);
 287                 break;
 288
 289         case VFL_TYPE_RADIO:
 290                 CX18_INFO("Registered device %s for %s\n", name, s->name);
 291                 break;
 292
 293         case VFL_TYPE_VBI:
 294                 if (cx->stream_buffers[type])
 295                         CX18_INFO("Registered device %s for %s "
 296                                   "(%d x %d bytes)\n",
 297                                   name, s->name, cx->stream_buffers[type],
 298                                   cx->stream_buf_size[type]);
 299                 else
 300                         CX18_INFO("Registered device %s for %s\n",
 301                                 name, s->name);
 302                 break;
 303         }
 304
 305         return 0;
 306 }
 307
 308 /* Register v4l2 devices */
 309 int cx18_streams_register(struct cx18 *cx)
 310 {
 311         int type;
 312         int err;
 313         int ret = 0;
 314
 315         /* Register V4L2 devices */
 316         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 317                 err = cx18_reg_dev(cx, type);
 318                 if (err && ret == 0)
 319                         ret = err;
 320         }
 321
 322         if (ret == 0)
 323                 return 0;
 324
 325         /* One or more streams could not be initialized. Clean 'em all up. */
 326         cx18_streams_cleanup(cx, 1);
 327         return ret;
 328 }
 329
 330 /* Unregister v4l2 devices */
 331 void cx18_streams_cleanup(struct cx18 *cx, int unregister)
 332 {
 333         struct video_device *vdev;
 334         int type;
 335
 336         /* Teardown all streams */
 337         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 338
 339                 /* The TS has a cx18_dvb structure, not a video_device */
 340                 if (type == CX18_ENC_STREAM_TYPE_TS) {
 341                         if (cx->streams[type].dvb != NULL) {
 342                                 if (unregister)
 343                                         cx18_dvb_unregister(&cx->streams[type]);
 344                                 kfree(cx->streams[type].dvb);
 345                                 cx->streams[type].dvb = NULL;
 346                                 cx18_stream_free(&cx->streams[type]);
 347                         }
 348                         continue;
 349                 }
 350
 351                 /* No struct video_device, but can have buffers allocated */
 352                 if (type == CX18_ENC_STREAM_TYPE_IDX) {
 353                         /* If the module params didn't inhibit IDX ... */
 354                         if (cx->stream_buffers[type] != 0) {
 355                                 cx->stream_buffers[type] = 0;
 356                                 /*
 357                                  * Before calling cx18_stream_free(),
 358                                  * check if the IDX stream was actually set up.
 359                                  * Needed, since the cx18_probe() error path
 360                                  * exits through here as well as normal clean up
 361                                  */
 362                                 if (cx->streams[type].buffers != 0)
 363                                         cx18_stream_free(&cx->streams[type]);
 364                         }
 365                         continue;
 366                 }
 367
 368                 /* If struct video_device exists, can have buffers allocated */
 369                 vdev = cx->streams[type].video_dev;
 370
 371                 cx->streams[type].video_dev = NULL;
 372                 if (vdev == NULL)
 373                         continue;
 374
 375                 cx18_stream_free(&cx->streams[type]);
 376
 377                 /* Unregister or release device */
 378                 if (unregister)
 379                         video_unregister_device(vdev);
 380                 else
 381                         video_device_release(vdev);
 382         }
 383 }
 384
 385 static void cx18_vbi_setup(struct cx18_stream *s)
 386 {
 387         struct cx18 *cx = s->cx;
 388         int raw = cx18_raw_vbi(cx);
 389         u32 data[CX2341X_MBOX_MAX_DATA];
 390         int lines;
 391
 392         if (cx->is_60hz) {
 393                 cx->vbi.count = 12;
 394                 cx->vbi.start[0] = 10;
 395                 cx->vbi.start[1] = 273;
 396         } else {        /* PAL/SECAM */
 397                 cx->vbi.count = 18;
 398                 cx->vbi.start[0] = 6;
 399                 cx->vbi.start[1] = 318;
 400         }
 401
 402         /* setup VBI registers */
 403         if (raw)
 404                 v4l2_subdev_call(cx->sd_av, vbi, s_raw_fmt, &cx->vbi.in.fmt.vbi);
 405         else
 406                 v4l2_subdev_call(cx->sd_av, vbi, s_sliced_fmt, &cx->vbi.in.fmt.sliced);
 407
 408         /*
 409          * Send the CX18_CPU_SET_RAW_VBI_PARAM API command to setup Encoder Raw
 410          * VBI when the first analog capture channel starts, as once it starts
 411          * (e.g. MPEG), we can't effect any change in the Encoder Raw VBI setup
 412          * (i.e. for the VBI capture channels).  We also send it for each
 413          * analog capture channel anyway just to make sure we get the proper
 414          * behavior
 415          */
 416         if (raw) {
 417                 lines = cx->vbi.count * 2;
 418         } else {
 419                 /*
 420                  * For 525/60 systems, according to the VIP 2 & BT.656 std:
 421                  * The EAV RP code's Field bit toggles on line 4, a few lines
 422                  * after the Vertcal Blank bit has already toggled.
 423                  * Tell the encoder to capture 21-4+1=18 lines per field,
 424                  * since we want lines 10 through 21.
 425                  *
 426                  * For 625/50 systems, according to the VIP 2 & BT.656 std:
 427                  * The EAV RP code's Field bit toggles on line 1, a few lines
 428                  * after the Vertcal Blank bit has already toggled.
 429                  * (We've actually set the digitizer so that the Field bit
 430                  * toggles on line 2.) Tell the encoder to capture 23-2+1=22
 431                  * lines per field, since we want lines 6 through 23.
 432                  */
 433                 lines = cx->is_60hz ? (21 - 4 + 1) * 2 : (23 - 2 + 1) * 2;
 434         }
 435
 436         data[0] = s->handle;
 437         /* Lines per field */
 438         data[1] = (lines / 2) | ((lines / 2) << 16);
 439         /* bytes per line */
 440         data[2] = (raw ? vbi_active_samples
 441                        : (cx->is_60hz ? vbi_hblank_samples_60Hz
 442                                       : vbi_hblank_samples_50Hz));
 443         /* Every X number of frames a VBI interrupt arrives
 444            (frames as in 25 or 30 fps) */
 445         data[3] = 1;
 446         /*
 447          * Set the SAV/EAV RP codes to look for as start/stop points
 448          * when in VIP-1.1 mode
 449          */
 450         if (raw) {
 451                 /*
 452                  * Start codes for beginning of "active" line in vertical blank
 453                  * 0x20 (               VerticalBlank                )
 454                  * 0x60 (     EvenField VerticalBlank                )
 455                  */
 456                 data[4] = 0x20602060;
 457                 /*
 458                  * End codes for end of "active" raw lines and regular lines
 459                  * 0x30 (               VerticalBlank HorizontalBlank)
 460                  * 0x70 (     EvenField VerticalBlank HorizontalBlank)
 461                  * 0x90 (Task                         HorizontalBlank)
 462                  * 0xd0 (Task EvenField               HorizontalBlank)
 463                  */
 464                 data[5] = 0x307090d0;
 465         } else {
 466                 /*
 467                  * End codes for active video, we want data in the hblank region
 468                  * 0xb0 (Task         0 VerticalBlank HorizontalBlank)
 469                  * 0xf0 (Task EvenField VerticalBlank HorizontalBlank)
 470                  *
 471                  * Since the V bit is only allowed to toggle in the EAV RP code,
 472                  * just before the first active region line, these two
 473                  * are problematic:
 474                  * 0x90 (Task                         HorizontalBlank)
 475                  * 0xd0 (Task EvenField               HorizontalBlank)
 476                  *
 477                  * We have set the digitzer such that we don't have to worry
 478                  * about these problem codes.
 479                  */
 480                 data[4] = 0xB0F0B0F0;
 481                 /*
 482                  * Start codes for beginning of active line in vertical blank
 483                  * 0xa0 (Task           VerticalBlank                )
 484                  * 0xe0 (Task EvenField VerticalBlank                )
 485                  */
 486                 data[5] = 0xA0E0A0E0;
 487         }
 488
 489         CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
 490                         data[0], data[1], data[2], data[3], data[4], data[5]);
 491
 492         cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
 493 }
 494
 495 void cx18_stream_rotate_idx_mdls(struct cx18 *cx)
 496 {
 497         struct cx18_stream *s = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
 498         struct cx18_mdl *mdl;
 499
 500         if (!cx18_stream_enabled(s))
 501                 return;
 502
 503         /* Return if the firmware is not running low on MDLs */
 504         if ((atomic_read(&s->q_free.depth) + atomic_read(&s->q_busy.depth)) >=
 505                                             CX18_ENC_STREAM_TYPE_IDX_FW_MDL_MIN)
 506                 return;
 507
 508         /* Return if there are no MDLs to rotate back to the firmware */
 509         if (atomic_read(&s->q_full.depth) < 2)
 510                 return;
 511
 512         /*
 513          * Take the oldest IDX MDL still holding data, and discard its index
 514          * entries by scheduling the MDL to go back to the firmware
 515          */
 516         mdl = cx18_dequeue(s, &s->q_full);
 517         if (mdl != NULL)
 518                 cx18_enqueue(s, mdl, &s->q_free);
 519 }
 520
 521 static
 522 struct cx18_queue *_cx18_stream_put_mdl_fw(struct cx18_stream *s,
 523                                            struct cx18_mdl *mdl)
 524 {
 525         struct cx18 *cx = s->cx;
 526         struct cx18_queue *q;
 527
 528         /* Don't give it to the firmware, if we're not running a capture */
 529         if (s->handle == CX18_INVALID_TASK_HANDLE ||
 530             test_bit(CX18_F_S_STOPPING, &s->s_flags) ||
 531             !test_bit(CX18_F_S_STREAMING, &s->s_flags))
 532                 return cx18_enqueue(s, mdl, &s->q_free);
 533
 534         q = cx18_enqueue(s, mdl, &s->q_busy);
 535         if (q != &s->q_busy)
 536                 return q; /* The firmware has the max MDLs it can handle */
 537
 538         cx18_mdl_sync_for_device(s, mdl);
 539         cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
 540                   (void __iomem *) &cx->scb->cpu_mdl[mdl->id] - cx->enc_mem,
 541                   s->bufs_per_mdl, mdl->id, s->mdl_size);
 542         return q;
 543 }
 544
 545 static
 546 void _cx18_stream_load_fw_queue(struct cx18_stream *s)
 547 {
 548         struct cx18_queue *q;
 549         struct cx18_mdl *mdl;
 550
 551         if (atomic_read(&s->q_free.depth) == 0 ||
 552             atomic_read(&s->q_busy.depth) >= CX18_MAX_FW_MDLS_PER_STREAM)
 553                 return;
 554
 555         /* Move from q_free to q_busy notifying the firmware, until the limit */
 556         do {
 557                 mdl = cx18_dequeue(s, &s->q_free);
 558                 if (mdl == NULL)
 559                         break;
 560                 q = _cx18_stream_put_mdl_fw(s, mdl);
 561         } while (atomic_read(&s->q_busy.depth) < CX18_MAX_FW_MDLS_PER_STREAM
 562                  && q == &s->q_busy);
 563 }
 564
 565 void cx18_out_work_handler(struct work_struct *work)
 566 {
 567         struct cx18_stream *s =
 568                          container_of(work, struct cx18_stream, out_work_order);
 569
 570         _cx18_stream_load_fw_queue(s);
 571 }
 572
 573 static void cx18_stream_configure_mdls(struct cx18_stream *s)
 574 {
 575         cx18_unload_queues(s);
 576
 577         switch (s->type) {
 578         case CX18_ENC_STREAM_TYPE_YUV:
 579                 /*
 580                  * Height should be a multiple of 32 lines.
 581                  * Set the MDL size to the exact size needed for one frame.
 582                  * Use enough buffers per MDL to cover the MDL size
 583                  */
 584                 s->mdl_size = 720 * s->cx->cxhdl.height * 3 / 2;
 585                 s->bufs_per_mdl = s->mdl_size / s->buf_size;
 586                 if (s->mdl_size % s->buf_size)
 587                         s->bufs_per_mdl++;
 588                 break;
 589         case CX18_ENC_STREAM_TYPE_VBI:
 590                 s->bufs_per_mdl = 1;
 591                 if  (cx18_raw_vbi(s->cx)) {
 592                         s->mdl_size = (s->cx->is_60hz ? 12 : 18)
 593                                                        * 2 * vbi_active_samples;
 594                 } else {
 595                         /*
 596                          * See comment in cx18_vbi_setup() below about the
 597                          * extra lines we capture in sliced VBI mode due to
 598                          * the lines on which EAV RP codes toggle.
 599                         */
 600                         s->mdl_size = s->cx->is_60hz
 601                                    ? (21 - 4 + 1) * 2 * vbi_hblank_samples_60Hz
 602                                    : (23 - 2 + 1) * 2 * vbi_hblank_samples_50Hz;
 603                 }
 604                 break;
 605         default:
 606                 s->bufs_per_mdl = 1;
 607                 s->mdl_size = s->buf_size * s->bufs_per_mdl;
 608                 break;
 609         }
 610
 611         cx18_load_queues(s);
 612 }
 613
 614 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
 615 {
 616         u32 data[MAX_MB_ARGUMENTS];
 617         struct cx18 *cx = s->cx;
 618         int captype = 0;
 619         struct cx18_stream *s_idx;
 620
 621         if (!cx18_stream_enabled(s))
 622                 return -EINVAL;
 623
 624         CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
 625
 626         switch (s->type) {
 627         case CX18_ENC_STREAM_TYPE_MPG:
 628                 captype = CAPTURE_CHANNEL_TYPE_MPEG;
 629                 cx->mpg_data_received = cx->vbi_data_inserted = 0;
 630                 cx->dualwatch_jiffies = jiffies;
 631                 cx->dualwatch_stereo_mode = v4l2_ctrl_g_ctrl(cx->cxhdl.audio_mode);
 632                 cx->search_pack_header = 0;
 633                 break;
 634
 635         case CX18_ENC_STREAM_TYPE_IDX:
 636                 captype = CAPTURE_CHANNEL_TYPE_INDEX;
 637                 break;
 638         case CX18_ENC_STREAM_TYPE_TS:
 639                 captype = CAPTURE_CHANNEL_TYPE_TS;
 640                 break;
 641         case CX18_ENC_STREAM_TYPE_YUV:
 642                 captype = CAPTURE_CHANNEL_TYPE_YUV;
 643                 break;
 644         case CX18_ENC_STREAM_TYPE_PCM:
 645                 captype = CAPTURE_CHANNEL_TYPE_PCM;
 646                 break;
 647         case CX18_ENC_STREAM_TYPE_VBI:
 648 #ifdef CX18_ENCODER_PARSES_SLICED
 649                 captype = cx18_raw_vbi(cx) ?
 650                      CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
 651 #else
 652                 /*
 653                  * Currently we set things up so that Sliced VBI from the
 654                  * digitizer is handled as Raw VBI by the encoder
 655                  */
 656                 captype = CAPTURE_CHANNEL_TYPE_VBI;
 657 #endif
 658                 cx->vbi.frame = 0;
 659                 cx->vbi.inserted_frame = 0;
 660                 memset(cx->vbi.sliced_mpeg_size,
 661                         0, sizeof(cx->vbi.sliced_mpeg_size));
 662                 break;
 663         default:
 664                 return -EINVAL;
 665         }
 666
 667         /* Clear Streamoff flags in case left from last capture */
 668         clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
 669
 670         cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
 671         s->handle = data[0];
 672         cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
 673
 674         /*
 675          * For everything but CAPTURE_CHANNEL_TYPE_TS, play it safe and
 676          * set up all the parameters, as it is not obvious which parameters the
 677          * firmware shares across capture channel types and which it does not.
 678          *
 679          * Some of the cx18_vapi() calls below apply to only certain capture
 680          * channel types.  We're hoping there's no harm in calling most of them
 681          * anyway, as long as the values are all consistent.  Setting some
 682          * shared parameters will have no effect once an analog capture channel
 683          * has started streaming.
 684          */
 685         if (captype != CAPTURE_CHANNEL_TYPE_TS) {
 686                 cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
 687                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
 688                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
 689                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
 690
 691                 /*
 692                  * Audio related reset according to
 693                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
 694                  */
 695                 if (atomic_read(&cx->ana_capturing) == 0)
 696                         cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2,
 697                                   s->handle, 12);
 698
 699                 /*
 700                  * Number of lines for Field 1 & Field 2 according to
 701                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
 702                  * Field 1 is 312 for 625 line systems in BT.656
 703                  * Field 2 is 313 for 625 line systems in BT.656
 704                  */
 705                 cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
 706                           s->handle, 312, 313);
 707
 708                 if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
 709                         cx18_vbi_setup(s);
 710
 711                 /*
 712                  * Select to receive I, P, and B frame index entries, if the
 713                  * index stream is enabled.  Otherwise disable index entry
 714                  * generation.
 715                  */
 716                 s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
 717                 cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 2,
 718                                  s->handle, cx18_stream_enabled(s_idx) ? 7 : 0);
 719
 720                 /* Call out to the common CX2341x API setup for user controls */
 721                 cx->cxhdl.priv = s;
 722                 cx2341x_handler_setup(&cx->cxhdl);
 723
 724                 /*
 725                  * When starting a capture and we're set for radio,
 726                  * ensure the video is muted, despite the user control.
 727                  */
 728                 if (!cx->cxhdl.video_mute &&
 729                     test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
 730                         cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
 731                           (v4l2_ctrl_g_ctrl(cx->cxhdl.video_mute_yuv) << 8) | 1);
 732         }
 733
 734         if (atomic_read(&cx->tot_capturing) == 0) {
 735                 cx2341x_handler_set_busy(&cx->cxhdl, 1);
 736                 clear_bit(CX18_F_I_EOS, &cx->i_flags);
 737                 cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
 738         }
 739
 740         cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
 741                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
 742                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
 743
 744         /* Init all the cpu_mdls for this stream */
 745         cx18_stream_configure_mdls(s);
 746         _cx18_stream_load_fw_queue(s);
 747
 748         /* begin_capture */
 749         if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
 750                 CX18_DEBUG_WARN("Error starting capture!\n");
 751                 /* Ensure we're really not capturing before releasing MDLs */
 752                 set_bit(CX18_F_S_STOPPING, &s->s_flags);
 753                 if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 754                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
 755                 else
 756                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 757                 clear_bit(CX18_F_S_STREAMING, &s->s_flags);
 758                 /* FIXME - CX18_F_S_STREAMOFF as well? */
 759                 cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 760                 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 761                 s->handle = CX18_INVALID_TASK_HANDLE;
 762                 clear_bit(CX18_F_S_STOPPING, &s->s_flags);
 763                 if (atomic_read(&cx->tot_capturing) == 0) {
 764                         set_bit(CX18_F_I_EOS, &cx->i_flags);
 765                         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
 766                 }
 767                 return -EINVAL;
 768         }
 769
 770         /* you're live! sit back and await interrupts :) */
 771         if (captype != CAPTURE_CHANNEL_TYPE_TS)
 772                 atomic_inc(&cx->ana_capturing);
 773         atomic_inc(&cx->tot_capturing);
 774         return 0;
 775 }
 776 EXPORT_SYMBOL(cx18_start_v4l2_encode_stream);
 777
 778 void cx18_stop_all_captures(struct cx18 *cx)
 779 {
 780         int i;
 781
 782         for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
 783                 struct cx18_stream *s = &cx->streams[i];
 784
 785                 if (!cx18_stream_enabled(s))
 786                         continue;
 787                 if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
 788                         cx18_stop_v4l2_encode_stream(s, 0);
 789         }
 790 }
 791
 792 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
 793 {
 794         struct cx18 *cx = s->cx;
 795         unsigned long then;
 796
 797         if (!cx18_stream_enabled(s))
 798                 return -EINVAL;
 799
 800         /* This function assumes that you are allowed to stop the capture
 801            and that we are actually capturing */
 802
 803         CX18_DEBUG_INFO("Stop Capture\n");
 804
 805         if (atomic_read(&cx->tot_capturing) == 0)
 806                 return 0;
 807
 808         set_bit(CX18_F_S_STOPPING, &s->s_flags);
 809         if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 810                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
 811         else
 812                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 813
 814         then = jiffies;
 815
 816         if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
 817                 CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
 818         }
 819
 820         if (s->type != CX18_ENC_STREAM_TYPE_TS)
 821                 atomic_dec(&cx->ana_capturing);
 822         atomic_dec(&cx->tot_capturing);
 823
 824         /* Clear capture and no-read bits */
 825         clear_bit(CX18_F_S_STREAMING, &s->s_flags);
 826
 827         /* Tell the CX23418 it can't use our buffers anymore */
 828         cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 829
 830         cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 831         s->handle = CX18_INVALID_TASK_HANDLE;
 832         clear_bit(CX18_F_S_STOPPING, &s->s_flags);
 833
 834         if (atomic_read(&cx->tot_capturing) > 0)
 835                 return 0;
 836
 837         cx2341x_handler_set_busy(&cx->cxhdl, 0);
 838         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
 839         wake_up(&s->waitq);
 840
 841         return 0;
 842 }
 843 EXPORT_SYMBOL(cx18_stop_v4l2_encode_stream);
 844
 845 u32 cx18_find_handle(struct cx18 *cx)
 846 {
 847         int i;
 848
 849         /* find first available handle to be used for global settings */
 850         for (i = 0; i < CX18_MAX_STREAMS; i++) {
 851                 struct cx18_stream *s = &cx->streams[i];
 852
 853                 if (s->video_dev && (s->handle != CX18_INVALID_TASK_HANDLE))
 854                         return s->handle;
 855         }
 856         return CX18_INVALID_TASK_HANDLE;
 857 }
 858
 859 struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle)
 860 {
 861         int i;
 862         struct cx18_stream *s;
 863
 864         if (handle == CX18_INVALID_TASK_HANDLE)
 865                 return NULL;
 866
 867         for (i = 0; i < CX18_MAX_STREAMS; i++) {
 868                 s = &cx->streams[i];
 869                 if (s->handle != handle)
 870                         continue;
 871                 if (cx18_stream_enabled(s))
 872                         return s;
 873         }
 874         return NULL;
 875 }