drivers/media/pci/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         .unlocked_ioctl = video_ioctl2,
  44         .release = cx18_v4l2_close,
  45         .poll = cx18_v4l2_enc_poll,
  46         .mmap = cx18_v4l2_mmap,
  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         u32 caps;
  62 } cx18_stream_info[] = {
  63         {       /* CX18_ENC_STREAM_TYPE_MPG */
  64                 "encoder MPEG",
  65                 VFL_TYPE_GRABBER, 0,
  66                 PCI_DMA_FROMDEVICE,
  67                 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
  68                 V4L2_CAP_AUDIO | V4L2_CAP_TUNER
  69         },
  70         {       /* CX18_ENC_STREAM_TYPE_TS */
  71                 "TS",
  72                 VFL_TYPE_GRABBER, -1,
  73                 PCI_DMA_FROMDEVICE,
  74         },
  75         {       /* CX18_ENC_STREAM_TYPE_YUV */
  76                 "encoder YUV",
  77                 VFL_TYPE_GRABBER, CX18_V4L2_ENC_YUV_OFFSET,
  78                 PCI_DMA_FROMDEVICE,
  79                 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
  80                 V4L2_CAP_STREAMING | V4L2_CAP_AUDIO | V4L2_CAP_TUNER
  81         },
  82         {       /* CX18_ENC_STREAM_TYPE_VBI */
  83                 "encoder VBI",
  84                 VFL_TYPE_VBI, 0,
  85                 PCI_DMA_FROMDEVICE,
  86                 V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE |
  87                 V4L2_CAP_READWRITE | V4L2_CAP_TUNER
  88         },
  89         {       /* CX18_ENC_STREAM_TYPE_PCM */
  90                 "encoder PCM audio",
  91                 VFL_TYPE_GRABBER, CX18_V4L2_ENC_PCM_OFFSET,
  92                 PCI_DMA_FROMDEVICE,
  93         },
  94         {       /* CX18_ENC_STREAM_TYPE_IDX */
  95                 "encoder IDX",
  96                 VFL_TYPE_GRABBER, -1,
  97                 PCI_DMA_FROMDEVICE,
  98         },
  99         {       /* CX18_ENC_STREAM_TYPE_RAD */
 100                 "encoder radio",
 101                 VFL_TYPE_RADIO, 0,
 102                 PCI_DMA_NONE,
 103                 V4L2_CAP_RADIO | V4L2_CAP_TUNER
 104         },
 105 };
 106
 107
 108 static void cx18_dma_free(struct videobuf_queue *q,
 109         struct cx18_stream *s, struct cx18_videobuf_buffer *buf)
 110 {
 111         videobuf_waiton(q, &buf->vb, 0, 0);
 112         videobuf_vmalloc_free(&buf->vb);
 113         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 114 }
 115
 116 static int cx18_prepare_buffer(struct videobuf_queue *q,
 117         struct cx18_stream *s,
 118         struct cx18_videobuf_buffer *buf,
 119         u32 pixelformat,
 120         unsigned int width, unsigned int height,
 121         enum v4l2_field field)
 122 {
 123         struct cx18 *cx = s->cx;
 124         int rc = 0;
 125
 126         /* check settings */
 127         buf->bytes_used = 0;
 128
 129         if ((width  < 48) || (height < 32))
 130                 return -EINVAL;
 131
 132         buf->vb.size = (width * height * 2);
 133         if ((buf->vb.baddr != 0) && (buf->vb.bsize < buf->vb.size))
 134                 return -EINVAL;
 135
 136         /* alloc + fill struct (if changed) */
 137         if (buf->vb.width != width || buf->vb.height != height ||
 138             buf->vb.field != field || s->pixelformat != pixelformat ||
 139             buf->tvnorm != cx->std) {
 140
 141                 buf->vb.width  = width;
 142                 buf->vb.height = height;
 143                 buf->vb.field  = field;
 144                 buf->tvnorm    = cx->std;
 145                 s->pixelformat = pixelformat;
 146
 147                 /* HM12 YUV size is (Y=(h*720) + UV=(h*(720/2)))
 148                    UYUV YUV size is (Y=(h*720) + UV=(h*(720))) */
 149                 if (s->pixelformat == V4L2_PIX_FMT_HM12)
 150                         s->vb_bytes_per_frame = height * 720 * 3 / 2;
 151                 else
 152                         s->vb_bytes_per_frame = height * 720 * 2;
 153                 cx18_dma_free(q, s, buf);
 154         }
 155
 156         if ((buf->vb.baddr != 0) && (buf->vb.bsize < buf->vb.size))
 157                 return -EINVAL;
 158
 159         if (buf->vb.field == 0)
 160                 buf->vb.field = V4L2_FIELD_INTERLACED;
 161
 162         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
 163                 buf->vb.width  = width;
 164                 buf->vb.height = height;
 165                 buf->vb.field  = field;
 166                 buf->tvnorm    = cx->std;
 167                 s->pixelformat = pixelformat;
 168
 169                 /* HM12 YUV size is (Y=(h*720) + UV=(h*(720/2)))
 170                    UYUV YUV size is (Y=(h*720) + UV=(h*(720))) */
 171                 if (s->pixelformat == V4L2_PIX_FMT_HM12)
 172                         s->vb_bytes_per_frame = height * 720 * 3 / 2;
 173                 else
 174                         s->vb_bytes_per_frame = height * 720 * 2;
 175                 rc = videobuf_iolock(q, &buf->vb, NULL);
 176                 if (rc != 0)
 177                         goto fail;
 178         }
 179         buf->vb.state = VIDEOBUF_PREPARED;
 180         return 0;
 181
 182 fail:
 183         cx18_dma_free(q, s, buf);
 184         return rc;
 185
 186 }
 187
 188 /* VB_MIN_BUFSIZE is lcm(1440 * 480, 1440 * 576)
 189    1440 is a single line of 4:2:2 YUV at 720 luma samples wide
 190 */
 191 #define VB_MIN_BUFFERS 32
 192 #define VB_MIN_BUFSIZE 4147200
 193
 194 static int buffer_setup(struct videobuf_queue *q,
 195         unsigned int *count, unsigned int *size)
 196 {
 197         struct cx18_stream *s = q->priv_data;
 198         struct cx18 *cx = s->cx;
 199
 200         *size = 2 * cx->cxhdl.width * cx->cxhdl.height;
 201         if (*count == 0)
 202                 *count = VB_MIN_BUFFERS;
 203
 204         while (*size * *count > VB_MIN_BUFFERS * VB_MIN_BUFSIZE)
 205                 (*count)--;
 206
 207         q->field = V4L2_FIELD_INTERLACED;
 208         q->last = V4L2_FIELD_INTERLACED;
 209
 210         return 0;
 211 }
 212
 213 static int buffer_prepare(struct videobuf_queue *q,
 214         struct videobuf_buffer *vb,
 215         enum v4l2_field field)
 216 {
 217         struct cx18_videobuf_buffer *buf =
 218                 container_of(vb, struct cx18_videobuf_buffer, vb);
 219         struct cx18_stream *s = q->priv_data;
 220         struct cx18 *cx = s->cx;
 221
 222         return cx18_prepare_buffer(q, s, buf, s->pixelformat,
 223                 cx->cxhdl.width, cx->cxhdl.height, field);
 224 }
 225
 226 static void buffer_release(struct videobuf_queue *q,
 227         struct videobuf_buffer *vb)
 228 {
 229         struct cx18_videobuf_buffer *buf =
 230                 container_of(vb, struct cx18_videobuf_buffer, vb);
 231         struct cx18_stream *s = q->priv_data;
 232
 233         cx18_dma_free(q, s, buf);
 234 }
 235
 236 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
 237 {
 238         struct cx18_videobuf_buffer *buf =
 239                 container_of(vb, struct cx18_videobuf_buffer, vb);
 240         struct cx18_stream *s = q->priv_data;
 241
 242         buf->vb.state = VIDEOBUF_QUEUED;
 243
 244         list_add_tail(&buf->vb.queue, &s->vb_capture);
 245 }
 246
 247 static struct videobuf_queue_ops cx18_videobuf_qops = {
 248         .buf_setup    = buffer_setup,
 249         .buf_prepare  = buffer_prepare,
 250         .buf_queue    = buffer_queue,
 251         .buf_release  = buffer_release,
 252 };
 253
 254 static void cx18_stream_init(struct cx18 *cx, int type)
 255 {
 256         struct cx18_stream *s = &cx->streams[type];
 257         struct video_device *video_dev = s->video_dev;
 258
 259         /* we need to keep video_dev, so restore it afterwards */
 260         memset(s, 0, sizeof(*s));
 261         s->video_dev = video_dev;
 262
 263         /* initialize cx18_stream fields */
 264         s->dvb = NULL;
 265         s->cx = cx;
 266         s->type = type;
 267         s->name = cx18_stream_info[type].name;
 268         s->handle = CX18_INVALID_TASK_HANDLE;
 269
 270         s->dma = cx18_stream_info[type].dma;
 271         s->v4l2_dev_caps = cx18_stream_info[type].caps;
 272         s->buffers = cx->stream_buffers[type];
 273         s->buf_size = cx->stream_buf_size[type];
 274         INIT_LIST_HEAD(&s->buf_pool);
 275         s->bufs_per_mdl = 1;
 276         s->mdl_size = s->buf_size * s->bufs_per_mdl;
 277
 278         init_waitqueue_head(&s->waitq);
 279         s->id = -1;
 280         spin_lock_init(&s->q_free.lock);
 281         cx18_queue_init(&s->q_free);
 282         spin_lock_init(&s->q_busy.lock);
 283         cx18_queue_init(&s->q_busy);
 284         spin_lock_init(&s->q_full.lock);
 285         cx18_queue_init(&s->q_full);
 286         spin_lock_init(&s->q_idle.lock);
 287         cx18_queue_init(&s->q_idle);
 288
 289         INIT_WORK(&s->out_work_order, cx18_out_work_handler);
 290
 291         INIT_LIST_HEAD(&s->vb_capture);
 292         s->vb_timeout.function = cx18_vb_timeout;
 293         s->vb_timeout.data = (unsigned long)s;
 294         init_timer(&s->vb_timeout);
 295         spin_lock_init(&s->vb_lock);
 296         if (type == CX18_ENC_STREAM_TYPE_YUV) {
 297                 spin_lock_init(&s->vbuf_q_lock);
 298
 299                 s->vb_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 300                 videobuf_queue_vmalloc_init(&s->vbuf_q, &cx18_videobuf_qops,
 301                         &cx->pci_dev->dev, &s->vbuf_q_lock,
 302                         V4L2_BUF_TYPE_VIDEO_CAPTURE,
 303                         V4L2_FIELD_INTERLACED,
 304                         sizeof(struct cx18_videobuf_buffer),
 305                         s, &cx->serialize_lock);
 306
 307                 /* Assume the previous pixel default */
 308                 s->pixelformat = V4L2_PIX_FMT_HM12;
 309                 s->vb_bytes_per_frame = cx->cxhdl.height * 720 * 3 / 2;
 310         }
 311 }
 312
 313 static int cx18_prep_dev(struct cx18 *cx, int type)
 314 {
 315         struct cx18_stream *s = &cx->streams[type];
 316         u32 cap = cx->v4l2_cap;
 317         int num_offset = cx18_stream_info[type].num_offset;
 318         int num = cx->instance + cx18_first_minor + num_offset;
 319
 320         /*
 321          * These five fields are always initialized.
 322          * For analog capture related streams, if video_dev == NULL then the
 323          * stream is not in use.
 324          * For the TS stream, if dvb == NULL then the stream is not in use.
 325          * In those cases no other fields but these four can be used.
 326          */
 327         s->video_dev = NULL;
 328         s->dvb = NULL;
 329         s->cx = cx;
 330         s->type = type;
 331         s->name = cx18_stream_info[type].name;
 332
 333         /* Check whether the radio is supported */
 334         if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
 335                 return 0;
 336
 337         /* Check whether VBI is supported */
 338         if (type == CX18_ENC_STREAM_TYPE_VBI &&
 339             !(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
 340                 return 0;
 341
 342         /* User explicitly selected 0 buffers for these streams, so don't
 343            create them. */
 344         if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
 345             cx->stream_buffers[type] == 0) {
 346                 CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
 347                 return 0;
 348         }
 349
 350         cx18_stream_init(cx, type);
 351
 352         /* Allocate the cx18_dvb struct only for the TS on cards with DTV */
 353         if (type == CX18_ENC_STREAM_TYPE_TS) {
 354                 if (cx->card->hw_all & CX18_HW_DVB) {
 355                         s->dvb = kzalloc(sizeof(struct cx18_dvb), GFP_KERNEL);
 356                         if (s->dvb == NULL) {
 357                                 CX18_ERR("Couldn't allocate cx18_dvb structure"
 358                                          " for %s\n", s->name);
 359                                 return -ENOMEM;
 360                         }
 361                 } else {
 362                         /* Don't need buffers for the TS, if there is no DVB */
 363                         s->buffers = 0;
 364                 }
 365         }
 366
 367         if (num_offset == -1)
 368                 return 0;
 369
 370         /* allocate and initialize the v4l2 video device structure */
 371         s->video_dev = video_device_alloc();
 372         if (s->video_dev == NULL) {
 373                 CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
 374                                 s->name);
 375                 return -ENOMEM;
 376         }
 377
 378         snprintf(s->video_dev->name, sizeof(s->video_dev->name), "%s %s",
 379                  cx->v4l2_dev.name, s->name);
 380
 381         s->video_dev->num = num;
 382         s->video_dev->v4l2_dev = &cx->v4l2_dev;
 383         s->video_dev->fops = &cx18_v4l2_enc_fops;
 384         s->video_dev->release = video_device_release;
 385         s->video_dev->tvnorms = V4L2_STD_ALL;
 386         s->video_dev->lock = &cx->serialize_lock;
 387         cx18_set_funcs(s->video_dev);
 388         return 0;
 389 }
 390
 391 /* Initialize v4l2 variables and register v4l2 devices */
 392 int cx18_streams_setup(struct cx18 *cx)
 393 {
 394         int type, ret;
 395
 396         /* Setup V4L2 Devices */
 397         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 398                 /* Prepare device */
 399                 ret = cx18_prep_dev(cx, type);
 400                 if (ret < 0)
 401                         break;
 402
 403                 /* Allocate Stream */
 404                 ret = cx18_stream_alloc(&cx->streams[type]);
 405                 if (ret < 0)
 406                         break;
 407         }
 408         if (type == CX18_MAX_STREAMS)
 409                 return 0;
 410
 411         /* One or more streams could not be initialized. Clean 'em all up. */
 412         cx18_streams_cleanup(cx, 0);
 413         return ret;
 414 }
 415
 416 static int cx18_reg_dev(struct cx18 *cx, int type)
 417 {
 418         struct cx18_stream *s = &cx->streams[type];
 419         int vfl_type = cx18_stream_info[type].vfl_type;
 420         const char *name;
 421         int num, ret;
 422
 423         if (type == CX18_ENC_STREAM_TYPE_TS && s->dvb != NULL) {
 424                 ret = cx18_dvb_register(s);
 425                 if (ret < 0) {
 426                         CX18_ERR("DVB failed to register\n");
 427                         return ret;
 428                 }
 429         }
 430
 431         if (s->video_dev == NULL)
 432                 return 0;
 433
 434         num = s->video_dev->num;
 435         /* card number + user defined offset + device offset */
 436         if (type != CX18_ENC_STREAM_TYPE_MPG) {
 437                 struct cx18_stream *s_mpg = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
 438
 439                 if (s_mpg->video_dev)
 440                         num = s_mpg->video_dev->num
 441                             + cx18_stream_info[type].num_offset;
 442         }
 443         video_set_drvdata(s->video_dev, s);
 444
 445         /* Register device. First try the desired minor, then any free one. */
 446         ret = video_register_device_no_warn(s->video_dev, vfl_type, num);
 447         if (ret < 0) {
 448                 CX18_ERR("Couldn't register v4l2 device for %s (device node number %d)\n",
 449                         s->name, num);
 450                 video_device_release(s->video_dev);
 451                 s->video_dev = NULL;
 452                 return ret;
 453         }
 454
 455         name = video_device_node_name(s->video_dev);
 456
 457         switch (vfl_type) {
 458         case VFL_TYPE_GRABBER:
 459                 CX18_INFO("Registered device %s for %s (%d x %d.%02d kB)\n",
 460                           name, s->name, cx->stream_buffers[type],
 461                           cx->stream_buf_size[type] / 1024,
 462                           (cx->stream_buf_size[type] * 100 / 1024) % 100);
 463                 break;
 464
 465         case VFL_TYPE_RADIO:
 466                 CX18_INFO("Registered device %s for %s\n", name, s->name);
 467                 break;
 468
 469         case VFL_TYPE_VBI:
 470                 if (cx->stream_buffers[type])
 471                         CX18_INFO("Registered device %s for %s "
 472                                   "(%d x %d bytes)\n",
 473                                   name, s->name, cx->stream_buffers[type],
 474                                   cx->stream_buf_size[type]);
 475                 else
 476                         CX18_INFO("Registered device %s for %s\n",
 477                                 name, s->name);
 478                 break;
 479         }
 480
 481         return 0;
 482 }
 483
 484 /* Register v4l2 devices */
 485 int cx18_streams_register(struct cx18 *cx)
 486 {
 487         int type;
 488         int err;
 489         int ret = 0;
 490
 491         /* Register V4L2 devices */
 492         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 493                 err = cx18_reg_dev(cx, type);
 494                 if (err && ret == 0)
 495                         ret = err;
 496         }
 497
 498         if (ret == 0)
 499                 return 0;
 500
 501         /* One or more streams could not be initialized. Clean 'em all up. */
 502         cx18_streams_cleanup(cx, 1);
 503         return ret;
 504 }
 505
 506 /* Unregister v4l2 devices */
 507 void cx18_streams_cleanup(struct cx18 *cx, int unregister)
 508 {
 509         struct video_device *vdev;
 510         int type;
 511
 512         /* Teardown all streams */
 513         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 514
 515                 /* The TS has a cx18_dvb structure, not a video_device */
 516                 if (type == CX18_ENC_STREAM_TYPE_TS) {
 517                         if (cx->streams[type].dvb != NULL) {
 518                                 if (unregister)
 519                                         cx18_dvb_unregister(&cx->streams[type]);
 520                                 kfree(cx->streams[type].dvb);
 521                                 cx->streams[type].dvb = NULL;
 522                                 cx18_stream_free(&cx->streams[type]);
 523                         }
 524                         continue;
 525                 }
 526
 527                 /* No struct video_device, but can have buffers allocated */
 528                 if (type == CX18_ENC_STREAM_TYPE_IDX) {
 529                         /* If the module params didn't inhibit IDX ... */
 530                         if (cx->stream_buffers[type] != 0) {
 531                                 cx->stream_buffers[type] = 0;
 532                                 /*
 533                                  * Before calling cx18_stream_free(),
 534                                  * check if the IDX stream was actually set up.
 535                                  * Needed, since the cx18_probe() error path
 536                                  * exits through here as well as normal clean up
 537                                  */
 538                                 if (cx->streams[type].buffers != 0)
 539                                         cx18_stream_free(&cx->streams[type]);
 540                         }
 541                         continue;
 542                 }
 543
 544                 /* If struct video_device exists, can have buffers allocated */
 545                 vdev = cx->streams[type].video_dev;
 546
 547                 cx->streams[type].video_dev = NULL;
 548                 if (vdev == NULL)
 549                         continue;
 550
 551                 if (type == CX18_ENC_STREAM_TYPE_YUV)
 552                         videobuf_mmap_free(&cx->streams[type].vbuf_q);
 553
 554                 cx18_stream_free(&cx->streams[type]);
 555
 556                 /* Unregister or release device */
 557                 if (unregister)
 558                         video_unregister_device(vdev);
 559                 else
 560                         video_device_release(vdev);
 561         }
 562 }
 563
 564 static void cx18_vbi_setup(struct cx18_stream *s)
 565 {
 566         struct cx18 *cx = s->cx;
 567         int raw = cx18_raw_vbi(cx);
 568         u32 data[CX2341X_MBOX_MAX_DATA];
 569         int lines;
 570
 571         if (cx->is_60hz) {
 572                 cx->vbi.count = 12;
 573                 cx->vbi.start[0] = 10;
 574                 cx->vbi.start[1] = 273;
 575         } else {        /* PAL/SECAM */
 576                 cx->vbi.count = 18;
 577                 cx->vbi.start[0] = 6;
 578                 cx->vbi.start[1] = 318;
 579         }
 580
 581         /* setup VBI registers */
 582         if (raw)
 583                 v4l2_subdev_call(cx->sd_av, vbi, s_raw_fmt, &cx->vbi.in.fmt.vbi);
 584         else
 585                 v4l2_subdev_call(cx->sd_av, vbi, s_sliced_fmt, &cx->vbi.in.fmt.sliced);
 586
 587         /*
 588          * Send the CX18_CPU_SET_RAW_VBI_PARAM API command to setup Encoder Raw
 589          * VBI when the first analog capture channel starts, as once it starts
 590          * (e.g. MPEG), we can't effect any change in the Encoder Raw VBI setup
 591          * (i.e. for the VBI capture channels).  We also send it for each
 592          * analog capture channel anyway just to make sure we get the proper
 593          * behavior
 594          */
 595         if (raw) {
 596                 lines = cx->vbi.count * 2;
 597         } else {
 598                 /*
 599                  * For 525/60 systems, according to the VIP 2 & BT.656 std:
 600                  * The EAV RP code's Field bit toggles on line 4, a few lines
 601                  * after the Vertcal Blank bit has already toggled.
 602                  * Tell the encoder to capture 21-4+1=18 lines per field,
 603                  * since we want lines 10 through 21.
 604                  *
 605                  * For 625/50 systems, according to the VIP 2 & BT.656 std:
 606                  * The EAV RP code's Field bit toggles on line 1, a few lines
 607                  * after the Vertcal Blank bit has already toggled.
 608                  * (We've actually set the digitizer so that the Field bit
 609                  * toggles on line 2.) Tell the encoder to capture 23-2+1=22
 610                  * lines per field, since we want lines 6 through 23.
 611                  */
 612                 lines = cx->is_60hz ? (21 - 4 + 1) * 2 : (23 - 2 + 1) * 2;
 613         }
 614
 615         data[0] = s->handle;
 616         /* Lines per field */
 617         data[1] = (lines / 2) | ((lines / 2) << 16);
 618         /* bytes per line */
 619         data[2] = (raw ? vbi_active_samples
 620                        : (cx->is_60hz ? vbi_hblank_samples_60Hz
 621                                       : vbi_hblank_samples_50Hz));
 622         /* Every X number of frames a VBI interrupt arrives
 623            (frames as in 25 or 30 fps) */
 624         data[3] = 1;
 625         /*
 626          * Set the SAV/EAV RP codes to look for as start/stop points
 627          * when in VIP-1.1 mode
 628          */
 629         if (raw) {
 630                 /*
 631                  * Start codes for beginning of "active" line in vertical blank
 632                  * 0x20 (               VerticalBlank                )
 633                  * 0x60 (     EvenField VerticalBlank                )
 634                  */
 635                 data[4] = 0x20602060;
 636                 /*
 637                  * End codes for end of "active" raw lines and regular lines
 638                  * 0x30 (               VerticalBlank HorizontalBlank)
 639                  * 0x70 (     EvenField VerticalBlank HorizontalBlank)
 640                  * 0x90 (Task                         HorizontalBlank)
 641                  * 0xd0 (Task EvenField               HorizontalBlank)
 642                  */
 643                 data[5] = 0x307090d0;
 644         } else {
 645                 /*
 646                  * End codes for active video, we want data in the hblank region
 647                  * 0xb0 (Task         0 VerticalBlank HorizontalBlank)
 648                  * 0xf0 (Task EvenField VerticalBlank HorizontalBlank)
 649                  *
 650                  * Since the V bit is only allowed to toggle in the EAV RP code,
 651                  * just before the first active region line, these two
 652                  * are problematic:
 653                  * 0x90 (Task                         HorizontalBlank)
 654                  * 0xd0 (Task EvenField               HorizontalBlank)
 655                  *
 656                  * We have set the digitzer such that we don't have to worry
 657                  * about these problem codes.
 658                  */
 659                 data[4] = 0xB0F0B0F0;
 660                 /*
 661                  * Start codes for beginning of active line in vertical blank
 662                  * 0xa0 (Task           VerticalBlank                )
 663                  * 0xe0 (Task EvenField VerticalBlank                )
 664                  */
 665                 data[5] = 0xA0E0A0E0;
 666         }
 667
 668         CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
 669                         data[0], data[1], data[2], data[3], data[4], data[5]);
 670
 671         cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
 672 }
 673
 674 void cx18_stream_rotate_idx_mdls(struct cx18 *cx)
 675 {
 676         struct cx18_stream *s = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
 677         struct cx18_mdl *mdl;
 678
 679         if (!cx18_stream_enabled(s))
 680                 return;
 681
 682         /* Return if the firmware is not running low on MDLs */
 683         if ((atomic_read(&s->q_free.depth) + atomic_read(&s->q_busy.depth)) >=
 684                                             CX18_ENC_STREAM_TYPE_IDX_FW_MDL_MIN)
 685                 return;
 686
 687         /* Return if there are no MDLs to rotate back to the firmware */
 688         if (atomic_read(&s->q_full.depth) < 2)
 689                 return;
 690
 691         /*
 692          * Take the oldest IDX MDL still holding data, and discard its index
 693          * entries by scheduling the MDL to go back to the firmware
 694          */
 695         mdl = cx18_dequeue(s, &s->q_full);
 696         if (mdl != NULL)
 697                 cx18_enqueue(s, mdl, &s->q_free);
 698 }
 699
 700 static
 701 struct cx18_queue *_cx18_stream_put_mdl_fw(struct cx18_stream *s,
 702                                            struct cx18_mdl *mdl)
 703 {
 704         struct cx18 *cx = s->cx;
 705         struct cx18_queue *q;
 706
 707         /* Don't give it to the firmware, if we're not running a capture */
 708         if (s->handle == CX18_INVALID_TASK_HANDLE ||
 709             test_bit(CX18_F_S_STOPPING, &s->s_flags) ||
 710             !test_bit(CX18_F_S_STREAMING, &s->s_flags))
 711                 return cx18_enqueue(s, mdl, &s->q_free);
 712
 713         q = cx18_enqueue(s, mdl, &s->q_busy);
 714         if (q != &s->q_busy)
 715                 return q; /* The firmware has the max MDLs it can handle */
 716
 717         cx18_mdl_sync_for_device(s, mdl);
 718         cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
 719                   (void __iomem *) &cx->scb->cpu_mdl[mdl->id] - cx->enc_mem,
 720                   s->bufs_per_mdl, mdl->id, s->mdl_size);
 721         return q;
 722 }
 723
 724 static
 725 void _cx18_stream_load_fw_queue(struct cx18_stream *s)
 726 {
 727         struct cx18_queue *q;
 728         struct cx18_mdl *mdl;
 729
 730         if (atomic_read(&s->q_free.depth) == 0 ||
 731             atomic_read(&s->q_busy.depth) >= CX18_MAX_FW_MDLS_PER_STREAM)
 732                 return;
 733
 734         /* Move from q_free to q_busy notifying the firmware, until the limit */
 735         do {
 736                 mdl = cx18_dequeue(s, &s->q_free);
 737                 if (mdl == NULL)
 738                         break;
 739                 q = _cx18_stream_put_mdl_fw(s, mdl);
 740         } while (atomic_read(&s->q_busy.depth) < CX18_MAX_FW_MDLS_PER_STREAM
 741                  && q == &s->q_busy);
 742 }
 743
 744 void cx18_out_work_handler(struct work_struct *work)
 745 {
 746         struct cx18_stream *s =
 747                          container_of(work, struct cx18_stream, out_work_order);
 748
 749         _cx18_stream_load_fw_queue(s);
 750 }
 751
 752 static void cx18_stream_configure_mdls(struct cx18_stream *s)
 753 {
 754         cx18_unload_queues(s);
 755
 756         switch (s->type) {
 757         case CX18_ENC_STREAM_TYPE_YUV:
 758                 /*
 759                  * Height should be a multiple of 32 lines.
 760                  * Set the MDL size to the exact size needed for one frame.
 761                  * Use enough buffers per MDL to cover the MDL size
 762                  */
 763                 if (s->pixelformat == V4L2_PIX_FMT_HM12)
 764                         s->mdl_size = 720 * s->cx->cxhdl.height * 3 / 2;
 765                 else
 766                         s->mdl_size = 720 * s->cx->cxhdl.height * 2;
 767                 s->bufs_per_mdl = s->mdl_size / s->buf_size;
 768                 if (s->mdl_size % s->buf_size)
 769                         s->bufs_per_mdl++;
 770                 break;
 771         case CX18_ENC_STREAM_TYPE_VBI:
 772                 s->bufs_per_mdl = 1;
 773                 if  (cx18_raw_vbi(s->cx)) {
 774                         s->mdl_size = (s->cx->is_60hz ? 12 : 18)
 775                                                        * 2 * vbi_active_samples;
 776                 } else {
 777                         /*
 778                          * See comment in cx18_vbi_setup() below about the
 779                          * extra lines we capture in sliced VBI mode due to
 780                          * the lines on which EAV RP codes toggle.
 781                         */
 782                         s->mdl_size = s->cx->is_60hz
 783                                    ? (21 - 4 + 1) * 2 * vbi_hblank_samples_60Hz
 784                                    : (23 - 2 + 1) * 2 * vbi_hblank_samples_50Hz;
 785                 }
 786                 break;
 787         default:
 788                 s->bufs_per_mdl = 1;
 789                 s->mdl_size = s->buf_size * s->bufs_per_mdl;
 790                 break;
 791         }
 792
 793         cx18_load_queues(s);
 794 }
 795
 796 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
 797 {
 798         u32 data[MAX_MB_ARGUMENTS];
 799         struct cx18 *cx = s->cx;
 800         int captype = 0;
 801         struct cx18_stream *s_idx;
 802
 803         if (!cx18_stream_enabled(s))
 804                 return -EINVAL;
 805
 806         CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
 807
 808         switch (s->type) {
 809         case CX18_ENC_STREAM_TYPE_MPG:
 810                 captype = CAPTURE_CHANNEL_TYPE_MPEG;
 811                 cx->mpg_data_received = cx->vbi_data_inserted = 0;
 812                 cx->dualwatch_jiffies = jiffies;
 813                 cx->dualwatch_stereo_mode = v4l2_ctrl_g_ctrl(cx->cxhdl.audio_mode);
 814                 cx->search_pack_header = 0;
 815                 break;
 816
 817         case CX18_ENC_STREAM_TYPE_IDX:
 818                 captype = CAPTURE_CHANNEL_TYPE_INDEX;
 819                 break;
 820         case CX18_ENC_STREAM_TYPE_TS:
 821                 captype = CAPTURE_CHANNEL_TYPE_TS;
 822                 break;
 823         case CX18_ENC_STREAM_TYPE_YUV:
 824                 captype = CAPTURE_CHANNEL_TYPE_YUV;
 825                 break;
 826         case CX18_ENC_STREAM_TYPE_PCM:
 827                 captype = CAPTURE_CHANNEL_TYPE_PCM;
 828                 break;
 829         case CX18_ENC_STREAM_TYPE_VBI:
 830 #ifdef CX18_ENCODER_PARSES_SLICED
 831                 captype = cx18_raw_vbi(cx) ?
 832                      CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
 833 #else
 834                 /*
 835                  * Currently we set things up so that Sliced VBI from the
 836                  * digitizer is handled as Raw VBI by the encoder
 837                  */
 838                 captype = CAPTURE_CHANNEL_TYPE_VBI;
 839 #endif
 840                 cx->vbi.frame = 0;
 841                 cx->vbi.inserted_frame = 0;
 842                 memset(cx->vbi.sliced_mpeg_size,
 843                         0, sizeof(cx->vbi.sliced_mpeg_size));
 844                 break;
 845         default:
 846                 return -EINVAL;
 847         }
 848
 849         /* Clear Streamoff flags in case left from last capture */
 850         clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
 851
 852         cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
 853         s->handle = data[0];
 854         cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
 855
 856         /*
 857          * For everything but CAPTURE_CHANNEL_TYPE_TS, play it safe and
 858          * set up all the parameters, as it is not obvious which parameters the
 859          * firmware shares across capture channel types and which it does not.
 860          *
 861          * Some of the cx18_vapi() calls below apply to only certain capture
 862          * channel types.  We're hoping there's no harm in calling most of them
 863          * anyway, as long as the values are all consistent.  Setting some
 864          * shared parameters will have no effect once an analog capture channel
 865          * has started streaming.
 866          */
 867         if (captype != CAPTURE_CHANNEL_TYPE_TS) {
 868                 cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
 869                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
 870                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
 871                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
 872
 873                 /*
 874                  * Audio related reset according to
 875                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
 876                  */
 877                 if (atomic_read(&cx->ana_capturing) == 0)
 878                         cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2,
 879                                   s->handle, 12);
 880
 881                 /*
 882                  * Number of lines for Field 1 & Field 2 according to
 883                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
 884                  * Field 1 is 312 for 625 line systems in BT.656
 885                  * Field 2 is 313 for 625 line systems in BT.656
 886                  */
 887                 cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
 888                           s->handle, 312, 313);
 889
 890                 if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
 891                         cx18_vbi_setup(s);
 892
 893                 /*
 894                  * Select to receive I, P, and B frame index entries, if the
 895                  * index stream is enabled.  Otherwise disable index entry
 896                  * generation.
 897                  */
 898                 s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
 899                 cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 2,
 900                                  s->handle, cx18_stream_enabled(s_idx) ? 7 : 0);
 901
 902                 /* Call out to the common CX2341x API setup for user controls */
 903                 cx->cxhdl.priv = s;
 904                 cx2341x_handler_setup(&cx->cxhdl);
 905
 906                 /*
 907                  * When starting a capture and we're set for radio,
 908                  * ensure the video is muted, despite the user control.
 909                  */
 910                 if (!cx->cxhdl.video_mute &&
 911                     test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
 912                         cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
 913                           (v4l2_ctrl_g_ctrl(cx->cxhdl.video_mute_yuv) << 8) | 1);
 914
 915                 /* Enable the Video Format Converter for UYVY 4:2:2 support,
 916                  * rather than the default HM12 Macroblovk 4:2:0 support.
 917                  */
 918                 if (captype == CAPTURE_CHANNEL_TYPE_YUV) {
 919                         if (s->pixelformat == V4L2_PIX_FMT_UYVY)
 920                                 cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2,
 921                                         s->handle, 1);
 922                         else
 923                                 /* If in doubt, default to HM12 */
 924                                 cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2,
 925                                         s->handle, 0);
 926                 }
 927         }
 928
 929         if (atomic_read(&cx->tot_capturing) == 0) {
 930                 cx2341x_handler_set_busy(&cx->cxhdl, 1);
 931                 clear_bit(CX18_F_I_EOS, &cx->i_flags);
 932                 cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
 933         }
 934
 935         cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
 936                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
 937                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
 938
 939         /* Init all the cpu_mdls for this stream */
 940         cx18_stream_configure_mdls(s);
 941         _cx18_stream_load_fw_queue(s);
 942
 943         /* begin_capture */
 944         if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
 945                 CX18_DEBUG_WARN("Error starting capture!\n");
 946                 /* Ensure we're really not capturing before releasing MDLs */
 947                 set_bit(CX18_F_S_STOPPING, &s->s_flags);
 948                 if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 949                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
 950                 else
 951                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 952                 clear_bit(CX18_F_S_STREAMING, &s->s_flags);
 953                 /* FIXME - CX18_F_S_STREAMOFF as well? */
 954                 cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 955                 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 956                 s->handle = CX18_INVALID_TASK_HANDLE;
 957                 clear_bit(CX18_F_S_STOPPING, &s->s_flags);
 958                 if (atomic_read(&cx->tot_capturing) == 0) {
 959                         set_bit(CX18_F_I_EOS, &cx->i_flags);
 960                         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
 961                 }
 962                 return -EINVAL;
 963         }
 964
 965         /* you're live! sit back and await interrupts :) */
 966         if (captype != CAPTURE_CHANNEL_TYPE_TS)
 967                 atomic_inc(&cx->ana_capturing);
 968         atomic_inc(&cx->tot_capturing);
 969         return 0;
 970 }
 971 EXPORT_SYMBOL(cx18_start_v4l2_encode_stream);
 972
 973 void cx18_stop_all_captures(struct cx18 *cx)
 974 {
 975         int i;
 976
 977         for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
 978                 struct cx18_stream *s = &cx->streams[i];
 979
 980                 if (!cx18_stream_enabled(s))
 981                         continue;
 982                 if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
 983                         cx18_stop_v4l2_encode_stream(s, 0);
 984         }
 985 }
 986
 987 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
 988 {
 989         struct cx18 *cx = s->cx;
 990
 991         if (!cx18_stream_enabled(s))
 992                 return -EINVAL;
 993
 994         /* This function assumes that you are allowed to stop the capture
 995            and that we are actually capturing */
 996
 997         CX18_DEBUG_INFO("Stop Capture\n");
 998
 999         if (atomic_read(&cx->tot_capturing) == 0)
1000                 return 0;
1001
1002         set_bit(CX18_F_S_STOPPING, &s->s_flags);
1003         if (s->type == CX18_ENC_STREAM_TYPE_MPG)
1004                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
1005         else
1006                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
1007
1008         if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
1009                 CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
1010         }
1011
1012         if (s->type != CX18_ENC_STREAM_TYPE_TS)
1013                 atomic_dec(&cx->ana_capturing);
1014         atomic_dec(&cx->tot_capturing);
1015
1016         /* Clear capture and no-read bits */
1017         clear_bit(CX18_F_S_STREAMING, &s->s_flags);
1018
1019         /* Tell the CX23418 it can't use our buffers anymore */
1020         cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
1021
1022         cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
1023         s->handle = CX18_INVALID_TASK_HANDLE;
1024         clear_bit(CX18_F_S_STOPPING, &s->s_flags);
1025
1026         if (atomic_read(&cx->tot_capturing) > 0)
1027                 return 0;
1028
1029         cx2341x_handler_set_busy(&cx->cxhdl, 0);
1030         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
1031         wake_up(&s->waitq);
1032
1033         return 0;
1034 }
1035 EXPORT_SYMBOL(cx18_stop_v4l2_encode_stream);
1036
1037 u32 cx18_find_handle(struct cx18 *cx)
1038 {
1039         int i;
1040
1041         /* find first available handle to be used for global settings */
1042         for (i = 0; i < CX18_MAX_STREAMS; i++) {
1043                 struct cx18_stream *s = &cx->streams[i];
1044
1045                 if (s->video_dev && (s->handle != CX18_INVALID_TASK_HANDLE))
1046                         return s->handle;
1047         }
1048         return CX18_INVALID_TASK_HANDLE;
1049 }
1050
1051 struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle)
1052 {
1053         int i;
1054         struct cx18_stream *s;
1055
1056         if (handle == CX18_INVALID_TASK_HANDLE)
1057                 return NULL;
1058
1059         for (i = 0; i < CX18_MAX_STREAMS; i++) {
1060                 s = &cx->streams[i];
1061                 if (s->handle != handle)
1062                         continue;
1063                 if (cx18_stream_enabled(s))
1064                         return s;
1065         }
1066         return NULL;
1067 }