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         cx18_set_funcs(s->video_dev);
 211         return 0;
 212 }
 213
 214 /* Initialize v4l2 variables and register v4l2 devices */
 215 int cx18_streams_setup(struct cx18 *cx)
 216 {
 217         int type, ret;
 218
 219         /* Setup V4L2 Devices */
 220         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 221                 /* Prepare device */
 222                 ret = cx18_prep_dev(cx, type);
 223                 if (ret < 0)
 224                         break;
 225
 226                 /* Allocate Stream */
 227                 ret = cx18_stream_alloc(&cx->streams[type]);
 228                 if (ret < 0)
 229                         break;
 230         }
 231         if (type == CX18_MAX_STREAMS)
 232                 return 0;
 233
 234         /* One or more streams could not be initialized. Clean 'em all up. */
 235         cx18_streams_cleanup(cx, 0);
 236         return ret;
 237 }
 238
 239 static int cx18_reg_dev(struct cx18 *cx, int type)
 240 {
 241         struct cx18_stream *s = &cx->streams[type];
 242         int vfl_type = cx18_stream_info[type].vfl_type;
 243         const char *name;
 244         int num, ret;
 245
 246         if (type == CX18_ENC_STREAM_TYPE_TS && s->dvb != NULL) {
 247                 ret = cx18_dvb_register(s);
 248                 if (ret < 0) {
 249                         CX18_ERR("DVB failed to register\n");
 250                         return ret;
 251                 }
 252         }
 253
 254         if (s->video_dev == NULL)
 255                 return 0;
 256
 257         num = s->video_dev->num;
 258         /* card number + user defined offset + device offset */
 259         if (type != CX18_ENC_STREAM_TYPE_MPG) {
 260                 struct cx18_stream *s_mpg = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
 261
 262                 if (s_mpg->video_dev)
 263                         num = s_mpg->video_dev->num
 264                             + cx18_stream_info[type].num_offset;
 265         }
 266         video_set_drvdata(s->video_dev, s);
 267
 268         /* Register device. First try the desired minor, then any free one. */
 269         ret = video_register_device_no_warn(s->video_dev, vfl_type, num);
 270         if (ret < 0) {
 271                 CX18_ERR("Couldn't register v4l2 device for %s (device node number %d)\n",
 272                         s->name, num);
 273                 video_device_release(s->video_dev);
 274                 s->video_dev = NULL;
 275                 return ret;
 276         }
 277
 278         name = video_device_node_name(s->video_dev);
 279
 280         switch (vfl_type) {
 281         case VFL_TYPE_GRABBER:
 282                 CX18_INFO("Registered device %s for %s (%d x %d.%02d kB)\n",
 283                           name, s->name, cx->stream_buffers[type],
 284                           cx->stream_buf_size[type] / 1024,
 285                           (cx->stream_buf_size[type] * 100 / 1024) % 100);
 286                 break;
 287
 288         case VFL_TYPE_RADIO:
 289                 CX18_INFO("Registered device %s for %s\n", name, s->name);
 290                 break;
 291
 292         case VFL_TYPE_VBI:
 293                 if (cx->stream_buffers[type])
 294                         CX18_INFO("Registered device %s for %s "
 295                                   "(%d x %d bytes)\n",
 296                                   name, s->name, cx->stream_buffers[type],
 297                                   cx->stream_buf_size[type]);
 298                 else
 299                         CX18_INFO("Registered device %s for %s\n",
 300                                 name, s->name);
 301                 break;
 302         }
 303
 304         return 0;
 305 }
 306
 307 /* Register v4l2 devices */
 308 int cx18_streams_register(struct cx18 *cx)
 309 {
 310         int type;
 311         int err;
 312         int ret = 0;
 313
 314         /* Register V4L2 devices */
 315         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 316                 err = cx18_reg_dev(cx, type);
 317                 if (err && ret == 0)
 318                         ret = err;
 319         }
 320
 321         if (ret == 0)
 322                 return 0;
 323
 324         /* One or more streams could not be initialized. Clean 'em all up. */
 325         cx18_streams_cleanup(cx, 1);
 326         return ret;
 327 }
 328
 329 /* Unregister v4l2 devices */
 330 void cx18_streams_cleanup(struct cx18 *cx, int unregister)
 331 {
 332         struct video_device *vdev;
 333         int type;
 334
 335         /* Teardown all streams */
 336         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 337
 338                 /* The TS has a cx18_dvb structure, not a video_device */
 339                 if (type == CX18_ENC_STREAM_TYPE_TS) {
 340                         if (cx->streams[type].dvb != NULL) {
 341                                 if (unregister)
 342                                         cx18_dvb_unregister(&cx->streams[type]);
 343                                 kfree(cx->streams[type].dvb);
 344                                 cx->streams[type].dvb = NULL;
 345                                 cx18_stream_free(&cx->streams[type]);
 346                         }
 347                         continue;
 348                 }
 349
 350                 /* No struct video_device, but can have buffers allocated */
 351                 if (type == CX18_ENC_STREAM_TYPE_IDX) {
 352                         if (cx->stream_buffers[type] != 0) {
 353                                 cx->stream_buffers[type] = 0;
 354                                 cx18_stream_free(&cx->streams[type]);
 355                         }
 356                         continue;
 357                 }
 358
 359                 /* If struct video_device exists, can have buffers allocated */
 360                 vdev = cx->streams[type].video_dev;
 361
 362                 cx->streams[type].video_dev = NULL;
 363                 if (vdev == NULL)
 364                         continue;
 365
 366                 cx18_stream_free(&cx->streams[type]);
 367
 368                 /* Unregister or release device */
 369                 if (unregister)
 370                         video_unregister_device(vdev);
 371                 else
 372                         video_device_release(vdev);
 373         }
 374 }
 375
 376 static void cx18_vbi_setup(struct cx18_stream *s)
 377 {
 378         struct cx18 *cx = s->cx;
 379         int raw = cx18_raw_vbi(cx);
 380         u32 data[CX2341X_MBOX_MAX_DATA];
 381         int lines;
 382
 383         if (cx->is_60hz) {
 384                 cx->vbi.count = 12;
 385                 cx->vbi.start[0] = 10;
 386                 cx->vbi.start[1] = 273;
 387         } else {        /* PAL/SECAM */
 388                 cx->vbi.count = 18;
 389                 cx->vbi.start[0] = 6;
 390                 cx->vbi.start[1] = 318;
 391         }
 392
 393         /* setup VBI registers */
 394         if (raw)
 395                 v4l2_subdev_call(cx->sd_av, vbi, s_raw_fmt, &cx->vbi.in.fmt.vbi);
 396         else
 397                 v4l2_subdev_call(cx->sd_av, vbi, s_sliced_fmt, &cx->vbi.in.fmt.sliced);
 398
 399         /*
 400          * Send the CX18_CPU_SET_RAW_VBI_PARAM API command to setup Encoder Raw
 401          * VBI when the first analog capture channel starts, as once it starts
 402          * (e.g. MPEG), we can't effect any change in the Encoder Raw VBI setup
 403          * (i.e. for the VBI capture channels).  We also send it for each
 404          * analog capture channel anyway just to make sure we get the proper
 405          * behavior
 406          */
 407         if (raw) {
 408                 lines = cx->vbi.count * 2;
 409         } else {
 410                 /*
 411                  * For 525/60 systems, according to the VIP 2 & BT.656 std:
 412                  * The EAV RP code's Field bit toggles on line 4, a few lines
 413                  * after the Vertcal Blank bit has already toggled.
 414                  * Tell the encoder to capture 21-4+1=18 lines per field,
 415                  * since we want lines 10 through 21.
 416                  *
 417                  * For 625/50 systems, according to the VIP 2 & BT.656 std:
 418                  * The EAV RP code's Field bit toggles on line 1, a few lines
 419                  * after the Vertcal Blank bit has already toggled.
 420                  * (We've actually set the digitizer so that the Field bit
 421                  * toggles on line 2.) Tell the encoder to capture 23-2+1=22
 422                  * lines per field, since we want lines 6 through 23.
 423                  */
 424                 lines = cx->is_60hz ? (21 - 4 + 1) * 2 : (23 - 2 + 1) * 2;
 425         }
 426
 427         data[0] = s->handle;
 428         /* Lines per field */
 429         data[1] = (lines / 2) | ((lines / 2) << 16);
 430         /* bytes per line */
 431         data[2] = (raw ? vbi_active_samples
 432                        : (cx->is_60hz ? vbi_hblank_samples_60Hz
 433                                       : vbi_hblank_samples_50Hz));
 434         /* Every X number of frames a VBI interrupt arrives
 435            (frames as in 25 or 30 fps) */
 436         data[3] = 1;
 437         /*
 438          * Set the SAV/EAV RP codes to look for as start/stop points
 439          * when in VIP-1.1 mode
 440          */
 441         if (raw) {
 442                 /*
 443                  * Start codes for beginning of "active" line in vertical blank
 444                  * 0x20 (               VerticalBlank                )
 445                  * 0x60 (     EvenField VerticalBlank                )
 446                  */
 447                 data[4] = 0x20602060;
 448                 /*
 449                  * End codes for end of "active" raw lines and regular lines
 450                  * 0x30 (               VerticalBlank HorizontalBlank)
 451                  * 0x70 (     EvenField VerticalBlank HorizontalBlank)
 452                  * 0x90 (Task                         HorizontalBlank)
 453                  * 0xd0 (Task EvenField               HorizontalBlank)
 454                  */
 455                 data[5] = 0x307090d0;
 456         } else {
 457                 /*
 458                  * End codes for active video, we want data in the hblank region
 459                  * 0xb0 (Task         0 VerticalBlank HorizontalBlank)
 460                  * 0xf0 (Task EvenField VerticalBlank HorizontalBlank)
 461                  *
 462                  * Since the V bit is only allowed to toggle in the EAV RP code,
 463                  * just before the first active region line, these two
 464                  * are problematic:
 465                  * 0x90 (Task                         HorizontalBlank)
 466                  * 0xd0 (Task EvenField               HorizontalBlank)
 467                  *
 468                  * We have set the digitzer such that we don't have to worry
 469                  * about these problem codes.
 470                  */
 471                 data[4] = 0xB0F0B0F0;
 472                 /*
 473                  * Start codes for beginning of active line in vertical blank
 474                  * 0xa0 (Task           VerticalBlank                )
 475                  * 0xe0 (Task EvenField VerticalBlank                )
 476                  */
 477                 data[5] = 0xA0E0A0E0;
 478         }
 479
 480         CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
 481                         data[0], data[1], data[2], data[3], data[4], data[5]);
 482
 483         cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
 484 }
 485
 486 void cx18_stream_rotate_idx_mdls(struct cx18 *cx)
 487 {
 488         struct cx18_stream *s = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
 489         struct cx18_mdl *mdl;
 490
 491         if (!cx18_stream_enabled(s))
 492                 return;
 493
 494         /* Return if the firmware is not running low on MDLs */
 495         if ((atomic_read(&s->q_free.depth) + atomic_read(&s->q_busy.depth)) >=
 496                                             CX18_ENC_STREAM_TYPE_IDX_FW_MDL_MIN)
 497                 return;
 498
 499         /* Return if there are no MDLs to rotate back to the firmware */
 500         if (atomic_read(&s->q_full.depth) < 2)
 501                 return;
 502
 503         /*
 504          * Take the oldest IDX MDL still holding data, and discard its index
 505          * entries by scheduling the MDL to go back to the firmware
 506          */
 507         mdl = cx18_dequeue(s, &s->q_full);
 508         if (mdl != NULL)
 509                 cx18_enqueue(s, mdl, &s->q_free);
 510 }
 511
 512 static
 513 struct cx18_queue *_cx18_stream_put_mdl_fw(struct cx18_stream *s,
 514                                            struct cx18_mdl *mdl)
 515 {
 516         struct cx18 *cx = s->cx;
 517         struct cx18_queue *q;
 518
 519         /* Don't give it to the firmware, if we're not running a capture */
 520         if (s->handle == CX18_INVALID_TASK_HANDLE ||
 521             test_bit(CX18_F_S_STOPPING, &s->s_flags) ||
 522             !test_bit(CX18_F_S_STREAMING, &s->s_flags))
 523                 return cx18_enqueue(s, mdl, &s->q_free);
 524
 525         q = cx18_enqueue(s, mdl, &s->q_busy);
 526         if (q != &s->q_busy)
 527                 return q; /* The firmware has the max MDLs it can handle */
 528
 529         cx18_mdl_sync_for_device(s, mdl);
 530         cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
 531                   (void __iomem *) &cx->scb->cpu_mdl[mdl->id] - cx->enc_mem,
 532                   s->bufs_per_mdl, mdl->id, s->mdl_size);
 533         return q;
 534 }
 535
 536 static
 537 void _cx18_stream_load_fw_queue(struct cx18_stream *s)
 538 {
 539         struct cx18_queue *q;
 540         struct cx18_mdl *mdl;
 541
 542         if (atomic_read(&s->q_free.depth) == 0 ||
 543             atomic_read(&s->q_busy.depth) >= CX18_MAX_FW_MDLS_PER_STREAM)
 544                 return;
 545
 546         /* Move from q_free to q_busy notifying the firmware, until the limit */
 547         do {
 548                 mdl = cx18_dequeue(s, &s->q_free);
 549                 if (mdl == NULL)
 550                         break;
 551                 q = _cx18_stream_put_mdl_fw(s, mdl);
 552         } while (atomic_read(&s->q_busy.depth) < CX18_MAX_FW_MDLS_PER_STREAM
 553                  && q == &s->q_busy);
 554 }
 555
 556 void cx18_out_work_handler(struct work_struct *work)
 557 {
 558         struct cx18_stream *s =
 559                          container_of(work, struct cx18_stream, out_work_order);
 560
 561         _cx18_stream_load_fw_queue(s);
 562 }
 563
 564 static void cx18_stream_configure_mdls(struct cx18_stream *s)
 565 {
 566         cx18_unload_queues(s);
 567
 568         switch (s->type) {
 569         case CX18_ENC_STREAM_TYPE_YUV:
 570                 /*
 571                  * Height should be a multiple of 32 lines.
 572                  * Set the MDL size to the exact size needed for one frame.
 573                  * Use enough buffers per MDL to cover the MDL size
 574                  */
 575                 s->mdl_size = 720 * s->cx->params.height * 3 / 2;
 576                 s->bufs_per_mdl = s->mdl_size / s->buf_size;
 577                 if (s->mdl_size % s->buf_size)
 578                         s->bufs_per_mdl++;
 579                 break;
 580         case CX18_ENC_STREAM_TYPE_VBI:
 581                 s->bufs_per_mdl = 1;
 582                 if  (cx18_raw_vbi(s->cx)) {
 583                         s->mdl_size = (s->cx->is_60hz ? 12 : 18)
 584                                                        * 2 * vbi_active_samples;
 585                 } else {
 586                         /*
 587                          * See comment in cx18_vbi_setup() below about the
 588                          * extra lines we capture in sliced VBI mode due to
 589                          * the lines on which EAV RP codes toggle.
 590                         */
 591                         s->mdl_size = s->cx->is_60hz
 592                                    ? (21 - 4 + 1) * 2 * vbi_hblank_samples_60Hz
 593                                    : (23 - 2 + 1) * 2 * vbi_hblank_samples_50Hz;
 594                 }
 595                 break;
 596         default:
 597                 s->bufs_per_mdl = 1;
 598                 s->mdl_size = s->buf_size * s->bufs_per_mdl;
 599                 break;
 600         }
 601
 602         cx18_load_queues(s);
 603 }
 604
 605 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
 606 {
 607         u32 data[MAX_MB_ARGUMENTS];
 608         struct cx18 *cx = s->cx;
 609         int captype = 0;
 610         struct cx18_api_func_private priv;
 611         struct cx18_stream *s_idx;
 612
 613         if (!cx18_stream_enabled(s))
 614                 return -EINVAL;
 615
 616         CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
 617
 618         switch (s->type) {
 619         case CX18_ENC_STREAM_TYPE_MPG:
 620                 captype = CAPTURE_CHANNEL_TYPE_MPEG;
 621                 cx->mpg_data_received = cx->vbi_data_inserted = 0;
 622                 cx->dualwatch_jiffies = jiffies;
 623                 cx->dualwatch_stereo_mode = cx->params.audio_properties & 0x300;
 624                 cx->search_pack_header = 0;
 625                 break;
 626
 627         case CX18_ENC_STREAM_TYPE_IDX:
 628                 captype = CAPTURE_CHANNEL_TYPE_INDEX;
 629                 break;
 630         case CX18_ENC_STREAM_TYPE_TS:
 631                 captype = CAPTURE_CHANNEL_TYPE_TS;
 632                 break;
 633         case CX18_ENC_STREAM_TYPE_YUV:
 634                 captype = CAPTURE_CHANNEL_TYPE_YUV;
 635                 break;
 636         case CX18_ENC_STREAM_TYPE_PCM:
 637                 captype = CAPTURE_CHANNEL_TYPE_PCM;
 638                 break;
 639         case CX18_ENC_STREAM_TYPE_VBI:
 640 #ifdef CX18_ENCODER_PARSES_SLICED
 641                 captype = cx18_raw_vbi(cx) ?
 642                      CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
 643 #else
 644                 /*
 645                  * Currently we set things up so that Sliced VBI from the
 646                  * digitizer is handled as Raw VBI by the encoder
 647                  */
 648                 captype = CAPTURE_CHANNEL_TYPE_VBI;
 649 #endif
 650                 cx->vbi.frame = 0;
 651                 cx->vbi.inserted_frame = 0;
 652                 memset(cx->vbi.sliced_mpeg_size,
 653                         0, sizeof(cx->vbi.sliced_mpeg_size));
 654                 break;
 655         default:
 656                 return -EINVAL;
 657         }
 658
 659         /* Clear Streamoff flags in case left from last capture */
 660         clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
 661
 662         cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
 663         s->handle = data[0];
 664         cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
 665
 666         /*
 667          * For everything but CAPTURE_CHANNEL_TYPE_TS, play it safe and
 668          * set up all the parameters, as it is not obvious which parameters the
 669          * firmware shares across capture channel types and which it does not.
 670          *
 671          * Some of the cx18_vapi() calls below apply to only certain capture
 672          * channel types.  We're hoping there's no harm in calling most of them
 673          * anyway, as long as the values are all consistent.  Setting some
 674          * shared parameters will have no effect once an analog capture channel
 675          * has started streaming.
 676          */
 677         if (captype != CAPTURE_CHANNEL_TYPE_TS) {
 678                 cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
 679                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
 680                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
 681                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
 682
 683                 /*
 684                  * Audio related reset according to
 685                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
 686                  */
 687                 if (atomic_read(&cx->ana_capturing) == 0)
 688                         cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2,
 689                                   s->handle, 12);
 690
 691                 /*
 692                  * Number of lines for Field 1 & Field 2 according to
 693                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
 694                  * Field 1 is 312 for 625 line systems in BT.656
 695                  * Field 2 is 313 for 625 line systems in BT.656
 696                  */
 697                 cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
 698                           s->handle, 312, 313);
 699
 700                 if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
 701                         cx18_vbi_setup(s);
 702
 703                 /*
 704                  * Select to receive I, P, and B frame index entries, if the
 705                  * index stream is enabled.  Otherwise disable index entry
 706                  * generation.
 707                  */
 708                 s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
 709                 cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 2,
 710                                  s->handle, cx18_stream_enabled(s_idx) ? 7 : 0);
 711
 712                 /* Call out to the common CX2341x API setup for user controls */
 713                 priv.cx = cx;
 714                 priv.s = s;
 715                 cx2341x_update(&priv, cx18_api_func, NULL, &cx->params);
 716
 717                 /*
 718                  * When starting a capture and we're set for radio,
 719                  * ensure the video is muted, despite the user control.
 720                  */
 721                 if (!cx->params.video_mute &&
 722                     test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
 723                         cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
 724                                   (cx->params.video_mute_yuv << 8) | 1);
 725         }
 726
 727         if (atomic_read(&cx->tot_capturing) == 0) {
 728                 clear_bit(CX18_F_I_EOS, &cx->i_flags);
 729                 cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
 730         }
 731
 732         cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
 733                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
 734                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
 735
 736         /* Init all the cpu_mdls for this stream */
 737         cx18_stream_configure_mdls(s);
 738         _cx18_stream_load_fw_queue(s);
 739
 740         /* begin_capture */
 741         if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
 742                 CX18_DEBUG_WARN("Error starting capture!\n");
 743                 /* Ensure we're really not capturing before releasing MDLs */
 744                 set_bit(CX18_F_S_STOPPING, &s->s_flags);
 745                 if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 746                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
 747                 else
 748                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 749                 clear_bit(CX18_F_S_STREAMING, &s->s_flags);
 750                 /* FIXME - CX18_F_S_STREAMOFF as well? */
 751                 cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 752                 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 753                 s->handle = CX18_INVALID_TASK_HANDLE;
 754                 clear_bit(CX18_F_S_STOPPING, &s->s_flags);
 755                 if (atomic_read(&cx->tot_capturing) == 0) {
 756                         set_bit(CX18_F_I_EOS, &cx->i_flags);
 757                         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
 758                 }
 759                 return -EINVAL;
 760         }
 761
 762         /* you're live! sit back and await interrupts :) */
 763         if (captype != CAPTURE_CHANNEL_TYPE_TS)
 764                 atomic_inc(&cx->ana_capturing);
 765         atomic_inc(&cx->tot_capturing);
 766         return 0;
 767 }
 768 EXPORT_SYMBOL(cx18_start_v4l2_encode_stream);
 769
 770 void cx18_stop_all_captures(struct cx18 *cx)
 771 {
 772         int i;
 773
 774         for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
 775                 struct cx18_stream *s = &cx->streams[i];
 776
 777                 if (!cx18_stream_enabled(s))
 778                         continue;
 779                 if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
 780                         cx18_stop_v4l2_encode_stream(s, 0);
 781         }
 782 }
 783
 784 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
 785 {
 786         struct cx18 *cx = s->cx;
 787         unsigned long then;
 788
 789         if (!cx18_stream_enabled(s))
 790                 return -EINVAL;
 791
 792         /* This function assumes that you are allowed to stop the capture
 793            and that we are actually capturing */
 794
 795         CX18_DEBUG_INFO("Stop Capture\n");
 796
 797         if (atomic_read(&cx->tot_capturing) == 0)
 798                 return 0;
 799
 800         set_bit(CX18_F_S_STOPPING, &s->s_flags);
 801         if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 802                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
 803         else
 804                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 805
 806         then = jiffies;
 807
 808         if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
 809                 CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
 810         }
 811
 812         if (s->type != CX18_ENC_STREAM_TYPE_TS)
 813                 atomic_dec(&cx->ana_capturing);
 814         atomic_dec(&cx->tot_capturing);
 815
 816         /* Clear capture and no-read bits */
 817         clear_bit(CX18_F_S_STREAMING, &s->s_flags);
 818
 819         /* Tell the CX23418 it can't use our buffers anymore */
 820         cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 821
 822         cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 823         s->handle = CX18_INVALID_TASK_HANDLE;
 824         clear_bit(CX18_F_S_STOPPING, &s->s_flags);
 825
 826         if (atomic_read(&cx->tot_capturing) > 0)
 827                 return 0;
 828
 829         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
 830         wake_up(&s->waitq);
 831
 832         return 0;
 833 }
 834 EXPORT_SYMBOL(cx18_stop_v4l2_encode_stream);
 835
 836 u32 cx18_find_handle(struct cx18 *cx)
 837 {
 838         int i;
 839
 840         /* find first available handle to be used for global settings */
 841         for (i = 0; i < CX18_MAX_STREAMS; i++) {
 842                 struct cx18_stream *s = &cx->streams[i];
 843
 844                 if (s->video_dev && (s->handle != CX18_INVALID_TASK_HANDLE))
 845                         return s->handle;
 846         }
 847         return CX18_INVALID_TASK_HANDLE;
 848 }
 849
 850 struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle)
 851 {
 852         int i;
 853         struct cx18_stream *s;
 854
 855         if (handle == CX18_INVALID_TASK_HANDLE)
 856                 return NULL;
 857
 858         for (i = 0; i < CX18_MAX_STREAMS; i++) {
 859                 s = &cx->streams[i];
 860                 if (s->handle != handle)
 861                         continue;
 862                 if (cx18_stream_enabled(s))
 863                         return s;
 864         }
 865         return NULL;
 866 }