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 } cx18_stream_info[] = {
  62         {       /* CX18_ENC_STREAM_TYPE_MPG */
  63                 "encoder MPEG",
  64                 VFL_TYPE_GRABBER, 0,
  65                 PCI_DMA_FROMDEVICE,
  66         },
  67         {       /* CX18_ENC_STREAM_TYPE_TS */
  68                 "TS",
  69                 VFL_TYPE_GRABBER, -1,
  70                 PCI_DMA_FROMDEVICE,
  71         },
  72         {       /* CX18_ENC_STREAM_TYPE_YUV */
  73                 "encoder YUV",
  74                 VFL_TYPE_GRABBER, CX18_V4L2_ENC_YUV_OFFSET,
  75                 PCI_DMA_FROMDEVICE,
  76         },
  77         {       /* CX18_ENC_STREAM_TYPE_VBI */
  78                 "encoder VBI",
  79                 VFL_TYPE_VBI, 0,
  80                 PCI_DMA_FROMDEVICE,
  81         },
  82         {       /* CX18_ENC_STREAM_TYPE_PCM */
  83                 "encoder PCM audio",
  84                 VFL_TYPE_GRABBER, CX18_V4L2_ENC_PCM_OFFSET,
  85                 PCI_DMA_FROMDEVICE,
  86         },
  87         {       /* CX18_ENC_STREAM_TYPE_IDX */
  88                 "encoder IDX",
  89                 VFL_TYPE_GRABBER, -1,
  90                 PCI_DMA_FROMDEVICE,
  91         },
  92         {       /* CX18_ENC_STREAM_TYPE_RAD */
  93                 "encoder radio",
  94                 VFL_TYPE_RADIO, 0,
  95                 PCI_DMA_NONE,
  96         },
  97 };
  98
  99
 100 void cx18_dma_free(struct videobuf_queue *q,
 101         struct cx18_stream *s, struct cx18_videobuf_buffer *buf)
 102 {
 103         videobuf_waiton(q, &buf->vb, 0, 0);
 104         videobuf_vmalloc_free(&buf->vb);
 105         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 106 }
 107
 108 static int cx18_prepare_buffer(struct videobuf_queue *q,
 109         struct cx18_stream *s,
 110         struct cx18_videobuf_buffer *buf,
 111         u32 pixelformat,
 112         unsigned int width, unsigned int height,
 113         enum v4l2_field field)
 114 {
 115         struct cx18 *cx = s->cx;
 116         int rc = 0;
 117
 118         /* check settings */
 119         buf->bytes_used = 0;
 120
 121         if ((width  < 48) || (height < 32))
 122                 return -EINVAL;
 123
 124         buf->vb.size = (width * height * 2);
 125         if ((buf->vb.baddr != 0) && (buf->vb.bsize < buf->vb.size))
 126                 return -EINVAL;
 127
 128         /* alloc + fill struct (if changed) */
 129         if (buf->vb.width != width || buf->vb.height != height ||
 130             buf->vb.field != field || s->pixelformat != pixelformat ||
 131             buf->tvnorm != cx->std) {
 132
 133                 buf->vb.width  = width;
 134                 buf->vb.height = height;
 135                 buf->vb.field  = field;
 136                 buf->tvnorm    = cx->std;
 137                 s->pixelformat = pixelformat;
 138
 139                 /* HM12 YUV size is (Y=(h*720) + UV=(h*(720/2)))
 140                    UYUV YUV size is (Y=(h*720) + UV=(h*(720))) */
 141                 if (s->pixelformat == V4L2_PIX_FMT_HM12)
 142                         s->vb_bytes_per_frame = height * 720 * 3 / 2;
 143                 else
 144                         s->vb_bytes_per_frame = height * 720 * 2;
 145                 cx18_dma_free(q, s, buf);
 146         }
 147
 148         if ((buf->vb.baddr != 0) && (buf->vb.bsize < buf->vb.size))
 149                 return -EINVAL;
 150
 151         if (buf->vb.field == 0)
 152                 buf->vb.field = V4L2_FIELD_INTERLACED;
 153
 154         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
 155                 buf->vb.width  = width;
 156                 buf->vb.height = height;
 157                 buf->vb.field  = field;
 158                 buf->tvnorm    = cx->std;
 159                 s->pixelformat = pixelformat;
 160
 161                 /* HM12 YUV size is (Y=(h*720) + UV=(h*(720/2)))
 162                    UYUV YUV size is (Y=(h*720) + UV=(h*(720))) */
 163                 if (s->pixelformat == V4L2_PIX_FMT_HM12)
 164                         s->vb_bytes_per_frame = height * 720 * 3 / 2;
 165                 else
 166                         s->vb_bytes_per_frame = height * 720 * 2;
 167                 rc = videobuf_iolock(q, &buf->vb, NULL);
 168                 if (rc != 0)
 169                         goto fail;
 170         }
 171         buf->vb.state = VIDEOBUF_PREPARED;
 172         return 0;
 173
 174 fail:
 175         cx18_dma_free(q, s, buf);
 176         return rc;
 177
 178 }
 179
 180 /* VB_MIN_BUFSIZE is lcm(1440 * 480, 1440 * 576)
 181    1440 is a single line of 4:2:2 YUV at 720 luma samples wide
 182 */
 183 #define VB_MIN_BUFFERS 32
 184 #define VB_MIN_BUFSIZE 4147200
 185
 186 static int buffer_setup(struct videobuf_queue *q,
 187         unsigned int *count, unsigned int *size)
 188 {
 189         struct cx18_stream *s = q->priv_data;
 190         struct cx18 *cx = s->cx;
 191
 192         *size = 2 * cx->cxhdl.width * cx->cxhdl.height;
 193         if (*count == 0)
 194                 *count = VB_MIN_BUFFERS;
 195
 196         while (*size * *count > VB_MIN_BUFFERS * VB_MIN_BUFSIZE)
 197                 (*count)--;
 198
 199         q->field = V4L2_FIELD_INTERLACED;
 200         q->last = V4L2_FIELD_INTERLACED;
 201
 202         return 0;
 203 }
 204
 205 static int buffer_prepare(struct videobuf_queue *q,
 206         struct videobuf_buffer *vb,
 207         enum v4l2_field field)
 208 {
 209         struct cx18_videobuf_buffer *buf =
 210                 container_of(vb, struct cx18_videobuf_buffer, vb);
 211         struct cx18_stream *s = q->priv_data;
 212         struct cx18 *cx = s->cx;
 213
 214         return cx18_prepare_buffer(q, s, buf, s->pixelformat,
 215                 cx->cxhdl.width, cx->cxhdl.height, field);
 216 }
 217
 218 static void buffer_release(struct videobuf_queue *q,
 219         struct videobuf_buffer *vb)
 220 {
 221         struct cx18_videobuf_buffer *buf =
 222                 container_of(vb, struct cx18_videobuf_buffer, vb);
 223         struct cx18_stream *s = q->priv_data;
 224
 225         cx18_dma_free(q, s, buf);
 226 }
 227
 228 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
 229 {
 230         struct cx18_videobuf_buffer *buf =
 231                 container_of(vb, struct cx18_videobuf_buffer, vb);
 232         struct cx18_stream *s = q->priv_data;
 233
 234         buf->vb.state = VIDEOBUF_QUEUED;
 235
 236         list_add_tail(&buf->vb.queue, &s->vb_capture);
 237 }
 238
 239 static struct videobuf_queue_ops cx18_videobuf_qops = {
 240         .buf_setup    = buffer_setup,
 241         .buf_prepare  = buffer_prepare,
 242         .buf_queue    = buffer_queue,
 243         .buf_release  = buffer_release,
 244 };
 245
 246 static void cx18_stream_init(struct cx18 *cx, int type)
 247 {
 248         struct cx18_stream *s = &cx->streams[type];
 249         struct video_device *video_dev = s->video_dev;
 250
 251         /* we need to keep video_dev, so restore it afterwards */
 252         memset(s, 0, sizeof(*s));
 253         s->video_dev = video_dev;
 254
 255         /* initialize cx18_stream fields */
 256         s->dvb = NULL;
 257         s->cx = cx;
 258         s->type = type;
 259         s->name = cx18_stream_info[type].name;
 260         s->handle = CX18_INVALID_TASK_HANDLE;
 261
 262         s->dma = cx18_stream_info[type].dma;
 263         s->buffers = cx->stream_buffers[type];
 264         s->buf_size = cx->stream_buf_size[type];
 265         INIT_LIST_HEAD(&s->buf_pool);
 266         s->bufs_per_mdl = 1;
 267         s->mdl_size = s->buf_size * s->bufs_per_mdl;
 268
 269         init_waitqueue_head(&s->waitq);
 270         s->id = -1;
 271         spin_lock_init(&s->q_free.lock);
 272         cx18_queue_init(&s->q_free);
 273         spin_lock_init(&s->q_busy.lock);
 274         cx18_queue_init(&s->q_busy);
 275         spin_lock_init(&s->q_full.lock);
 276         cx18_queue_init(&s->q_full);
 277         spin_lock_init(&s->q_idle.lock);
 278         cx18_queue_init(&s->q_idle);
 279
 280         INIT_WORK(&s->out_work_order, cx18_out_work_handler);
 281
 282         INIT_LIST_HEAD(&s->vb_capture);
 283         s->vb_timeout.function = cx18_vb_timeout;
 284         s->vb_timeout.data = (unsigned long)s;
 285         init_timer(&s->vb_timeout);
 286         spin_lock_init(&s->vb_lock);
 287         if (type == CX18_ENC_STREAM_TYPE_YUV) {
 288                 spin_lock_init(&s->vbuf_q_lock);
 289
 290                 s->vb_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 291                 videobuf_queue_vmalloc_init(&s->vbuf_q, &cx18_videobuf_qops,
 292                         &cx->pci_dev->dev, &s->vbuf_q_lock,
 293                         V4L2_BUF_TYPE_VIDEO_CAPTURE,
 294                         V4L2_FIELD_INTERLACED,
 295                         sizeof(struct cx18_videobuf_buffer),
 296                         s, &cx->serialize_lock);
 297
 298                 /* Assume the previous pixel default */
 299                 s->pixelformat = V4L2_PIX_FMT_HM12;
 300                 s->vb_bytes_per_frame = cx->cxhdl.height * 720 * 3 / 2;
 301         }
 302 }
 303
 304 static int cx18_prep_dev(struct cx18 *cx, int type)
 305 {
 306         struct cx18_stream *s = &cx->streams[type];
 307         u32 cap = cx->v4l2_cap;
 308         int num_offset = cx18_stream_info[type].num_offset;
 309         int num = cx->instance + cx18_first_minor + num_offset;
 310
 311         /*
 312          * These five fields are always initialized.
 313          * For analog capture related streams, if video_dev == NULL then the
 314          * stream is not in use.
 315          * For the TS stream, if dvb == NULL then the stream is not in use.
 316          * In those cases no other fields but these four can be used.
 317          */
 318         s->video_dev = NULL;
 319         s->dvb = NULL;
 320         s->cx = cx;
 321         s->type = type;
 322         s->name = cx18_stream_info[type].name;
 323
 324         /* Check whether the radio is supported */
 325         if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
 326                 return 0;
 327
 328         /* Check whether VBI is supported */
 329         if (type == CX18_ENC_STREAM_TYPE_VBI &&
 330             !(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
 331                 return 0;
 332
 333         /* User explicitly selected 0 buffers for these streams, so don't
 334            create them. */
 335         if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
 336             cx->stream_buffers[type] == 0) {
 337                 CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
 338                 return 0;
 339         }
 340
 341         cx18_stream_init(cx, type);
 342
 343         /* Allocate the cx18_dvb struct only for the TS on cards with DTV */
 344         if (type == CX18_ENC_STREAM_TYPE_TS) {
 345                 if (cx->card->hw_all & CX18_HW_DVB) {
 346                         s->dvb = kzalloc(sizeof(struct cx18_dvb), GFP_KERNEL);
 347                         if (s->dvb == NULL) {
 348                                 CX18_ERR("Couldn't allocate cx18_dvb structure"
 349                                          " for %s\n", s->name);
 350                                 return -ENOMEM;
 351                         }
 352                 } else {
 353                         /* Don't need buffers for the TS, if there is no DVB */
 354                         s->buffers = 0;
 355                 }
 356         }
 357
 358         if (num_offset == -1)
 359                 return 0;
 360
 361         /* allocate and initialize the v4l2 video device structure */
 362         s->video_dev = video_device_alloc();
 363         if (s->video_dev == NULL) {
 364                 CX18_ERR("Couldn't allocate v4l2 video_device for %s\n",
 365                                 s->name);
 366                 return -ENOMEM;
 367         }
 368
 369         snprintf(s->video_dev->name, sizeof(s->video_dev->name), "%s %s",
 370                  cx->v4l2_dev.name, s->name);
 371
 372         s->video_dev->num = num;
 373         s->video_dev->v4l2_dev = &cx->v4l2_dev;
 374         s->video_dev->fops = &cx18_v4l2_enc_fops;
 375         s->video_dev->release = video_device_release;
 376         s->video_dev->tvnorms = V4L2_STD_ALL;
 377         s->video_dev->lock = &cx->serialize_lock;
 378         set_bit(V4L2_FL_USE_FH_PRIO, &s->video_dev->flags);
 379         cx18_set_funcs(s->video_dev);
 380         return 0;
 381 }
 382
 383 /* Initialize v4l2 variables and register v4l2 devices */
 384 int cx18_streams_setup(struct cx18 *cx)
 385 {
 386         int type, ret;
 387
 388         /* Setup V4L2 Devices */
 389         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 390                 /* Prepare device */
 391                 ret = cx18_prep_dev(cx, type);
 392                 if (ret < 0)
 393                         break;
 394
 395                 /* Allocate Stream */
 396                 ret = cx18_stream_alloc(&cx->streams[type]);
 397                 if (ret < 0)
 398                         break;
 399         }
 400         if (type == CX18_MAX_STREAMS)
 401                 return 0;
 402
 403         /* One or more streams could not be initialized. Clean 'em all up. */
 404         cx18_streams_cleanup(cx, 0);
 405         return ret;
 406 }
 407
 408 static int cx18_reg_dev(struct cx18 *cx, int type)
 409 {
 410         struct cx18_stream *s = &cx->streams[type];
 411         int vfl_type = cx18_stream_info[type].vfl_type;
 412         const char *name;
 413         int num, ret;
 414
 415         if (type == CX18_ENC_STREAM_TYPE_TS && s->dvb != NULL) {
 416                 ret = cx18_dvb_register(s);
 417                 if (ret < 0) {
 418                         CX18_ERR("DVB failed to register\n");
 419                         return ret;
 420                 }
 421         }
 422
 423         if (s->video_dev == NULL)
 424                 return 0;
 425
 426         num = s->video_dev->num;
 427         /* card number + user defined offset + device offset */
 428         if (type != CX18_ENC_STREAM_TYPE_MPG) {
 429                 struct cx18_stream *s_mpg = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
 430
 431                 if (s_mpg->video_dev)
 432                         num = s_mpg->video_dev->num
 433                             + cx18_stream_info[type].num_offset;
 434         }
 435         video_set_drvdata(s->video_dev, s);
 436
 437         /* Register device. First try the desired minor, then any free one. */
 438         ret = video_register_device_no_warn(s->video_dev, vfl_type, num);
 439         if (ret < 0) {
 440                 CX18_ERR("Couldn't register v4l2 device for %s (device node number %d)\n",
 441                         s->name, num);
 442                 video_device_release(s->video_dev);
 443                 s->video_dev = NULL;
 444                 return ret;
 445         }
 446
 447         name = video_device_node_name(s->video_dev);
 448
 449         switch (vfl_type) {
 450         case VFL_TYPE_GRABBER:
 451                 CX18_INFO("Registered device %s for %s (%d x %d.%02d kB)\n",
 452                           name, s->name, cx->stream_buffers[type],
 453                           cx->stream_buf_size[type] / 1024,
 454                           (cx->stream_buf_size[type] * 100 / 1024) % 100);
 455                 break;
 456
 457         case VFL_TYPE_RADIO:
 458                 CX18_INFO("Registered device %s for %s\n", name, s->name);
 459                 break;
 460
 461         case VFL_TYPE_VBI:
 462                 if (cx->stream_buffers[type])
 463                         CX18_INFO("Registered device %s for %s "
 464                                   "(%d x %d bytes)\n",
 465                                   name, s->name, cx->stream_buffers[type],
 466                                   cx->stream_buf_size[type]);
 467                 else
 468                         CX18_INFO("Registered device %s for %s\n",
 469                                 name, s->name);
 470                 break;
 471         }
 472
 473         return 0;
 474 }
 475
 476 /* Register v4l2 devices */
 477 int cx18_streams_register(struct cx18 *cx)
 478 {
 479         int type;
 480         int err;
 481         int ret = 0;
 482
 483         /* Register V4L2 devices */
 484         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 485                 err = cx18_reg_dev(cx, type);
 486                 if (err && ret == 0)
 487                         ret = err;
 488         }
 489
 490         if (ret == 0)
 491                 return 0;
 492
 493         /* One or more streams could not be initialized. Clean 'em all up. */
 494         cx18_streams_cleanup(cx, 1);
 495         return ret;
 496 }
 497
 498 /* Unregister v4l2 devices */
 499 void cx18_streams_cleanup(struct cx18 *cx, int unregister)
 500 {
 501         struct video_device *vdev;
 502         int type;
 503
 504         /* Teardown all streams */
 505         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 506
 507                 /* The TS has a cx18_dvb structure, not a video_device */
 508                 if (type == CX18_ENC_STREAM_TYPE_TS) {
 509                         if (cx->streams[type].dvb != NULL) {
 510                                 if (unregister)
 511                                         cx18_dvb_unregister(&cx->streams[type]);
 512                                 kfree(cx->streams[type].dvb);
 513                                 cx->streams[type].dvb = NULL;
 514                                 cx18_stream_free(&cx->streams[type]);
 515                         }
 516                         continue;
 517                 }
 518
 519                 /* No struct video_device, but can have buffers allocated */
 520                 if (type == CX18_ENC_STREAM_TYPE_IDX) {
 521                         /* If the module params didn't inhibit IDX ... */
 522                         if (cx->stream_buffers[type] != 0) {
 523                                 cx->stream_buffers[type] = 0;
 524                                 /*
 525                                  * Before calling cx18_stream_free(),
 526                                  * check if the IDX stream was actually set up.
 527                                  * Needed, since the cx18_probe() error path
 528                                  * exits through here as well as normal clean up
 529                                  */
 530                                 if (cx->streams[type].buffers != 0)
 531                                         cx18_stream_free(&cx->streams[type]);
 532                         }
 533                         continue;
 534                 }
 535
 536                 /* If struct video_device exists, can have buffers allocated */
 537                 vdev = cx->streams[type].video_dev;
 538
 539                 cx->streams[type].video_dev = NULL;
 540                 if (vdev == NULL)
 541                         continue;
 542
 543                 if (type == CX18_ENC_STREAM_TYPE_YUV)
 544                         videobuf_mmap_free(&cx->streams[type].vbuf_q);
 545
 546                 cx18_stream_free(&cx->streams[type]);
 547
 548                 /* Unregister or release device */
 549                 if (unregister)
 550                         video_unregister_device(vdev);
 551                 else
 552                         video_device_release(vdev);
 553         }
 554 }
 555
 556 static void cx18_vbi_setup(struct cx18_stream *s)
 557 {
 558         struct cx18 *cx = s->cx;
 559         int raw = cx18_raw_vbi(cx);
 560         u32 data[CX2341X_MBOX_MAX_DATA];
 561         int lines;
 562
 563         if (cx->is_60hz) {
 564                 cx->vbi.count = 12;
 565                 cx->vbi.start[0] = 10;
 566                 cx->vbi.start[1] = 273;
 567         } else {        /* PAL/SECAM */
 568                 cx->vbi.count = 18;
 569                 cx->vbi.start[0] = 6;
 570                 cx->vbi.start[1] = 318;
 571         }
 572
 573         /* setup VBI registers */
 574         if (raw)
 575                 v4l2_subdev_call(cx->sd_av, vbi, s_raw_fmt, &cx->vbi.in.fmt.vbi);
 576         else
 577                 v4l2_subdev_call(cx->sd_av, vbi, s_sliced_fmt, &cx->vbi.in.fmt.sliced);
 578
 579         /*
 580          * Send the CX18_CPU_SET_RAW_VBI_PARAM API command to setup Encoder Raw
 581          * VBI when the first analog capture channel starts, as once it starts
 582          * (e.g. MPEG), we can't effect any change in the Encoder Raw VBI setup
 583          * (i.e. for the VBI capture channels).  We also send it for each
 584          * analog capture channel anyway just to make sure we get the proper
 585          * behavior
 586          */
 587         if (raw) {
 588                 lines = cx->vbi.count * 2;
 589         } else {
 590                 /*
 591                  * For 525/60 systems, according to the VIP 2 & BT.656 std:
 592                  * The EAV RP code's Field bit toggles on line 4, a few lines
 593                  * after the Vertcal Blank bit has already toggled.
 594                  * Tell the encoder to capture 21-4+1=18 lines per field,
 595                  * since we want lines 10 through 21.
 596                  *
 597                  * For 625/50 systems, according to the VIP 2 & BT.656 std:
 598                  * The EAV RP code's Field bit toggles on line 1, a few lines
 599                  * after the Vertcal Blank bit has already toggled.
 600                  * (We've actually set the digitizer so that the Field bit
 601                  * toggles on line 2.) Tell the encoder to capture 23-2+1=22
 602                  * lines per field, since we want lines 6 through 23.
 603                  */
 604                 lines = cx->is_60hz ? (21 - 4 + 1) * 2 : (23 - 2 + 1) * 2;
 605         }
 606
 607         data[0] = s->handle;
 608         /* Lines per field */
 609         data[1] = (lines / 2) | ((lines / 2) << 16);
 610         /* bytes per line */
 611         data[2] = (raw ? vbi_active_samples
 612                        : (cx->is_60hz ? vbi_hblank_samples_60Hz
 613                                       : vbi_hblank_samples_50Hz));
 614         /* Every X number of frames a VBI interrupt arrives
 615            (frames as in 25 or 30 fps) */
 616         data[3] = 1;
 617         /*
 618          * Set the SAV/EAV RP codes to look for as start/stop points
 619          * when in VIP-1.1 mode
 620          */
 621         if (raw) {
 622                 /*
 623                  * Start codes for beginning of "active" line in vertical blank
 624                  * 0x20 (               VerticalBlank                )
 625                  * 0x60 (     EvenField VerticalBlank                )
 626                  */
 627                 data[4] = 0x20602060;
 628                 /*
 629                  * End codes for end of "active" raw lines and regular lines
 630                  * 0x30 (               VerticalBlank HorizontalBlank)
 631                  * 0x70 (     EvenField VerticalBlank HorizontalBlank)
 632                  * 0x90 (Task                         HorizontalBlank)
 633                  * 0xd0 (Task EvenField               HorizontalBlank)
 634                  */
 635                 data[5] = 0x307090d0;
 636         } else {
 637                 /*
 638                  * End codes for active video, we want data in the hblank region
 639                  * 0xb0 (Task         0 VerticalBlank HorizontalBlank)
 640                  * 0xf0 (Task EvenField VerticalBlank HorizontalBlank)
 641                  *
 642                  * Since the V bit is only allowed to toggle in the EAV RP code,
 643                  * just before the first active region line, these two
 644                  * are problematic:
 645                  * 0x90 (Task                         HorizontalBlank)
 646                  * 0xd0 (Task EvenField               HorizontalBlank)
 647                  *
 648                  * We have set the digitzer such that we don't have to worry
 649                  * about these problem codes.
 650                  */
 651                 data[4] = 0xB0F0B0F0;
 652                 /*
 653                  * Start codes for beginning of active line in vertical blank
 654                  * 0xa0 (Task           VerticalBlank                )
 655                  * 0xe0 (Task EvenField VerticalBlank                )
 656                  */
 657                 data[5] = 0xA0E0A0E0;
 658         }
 659
 660         CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
 661                         data[0], data[1], data[2], data[3], data[4], data[5]);
 662
 663         cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
 664 }
 665
 666 void cx18_stream_rotate_idx_mdls(struct cx18 *cx)
 667 {
 668         struct cx18_stream *s = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
 669         struct cx18_mdl *mdl;
 670
 671         if (!cx18_stream_enabled(s))
 672                 return;
 673
 674         /* Return if the firmware is not running low on MDLs */
 675         if ((atomic_read(&s->q_free.depth) + atomic_read(&s->q_busy.depth)) >=
 676                                             CX18_ENC_STREAM_TYPE_IDX_FW_MDL_MIN)
 677                 return;
 678
 679         /* Return if there are no MDLs to rotate back to the firmware */
 680         if (atomic_read(&s->q_full.depth) < 2)
 681                 return;
 682
 683         /*
 684          * Take the oldest IDX MDL still holding data, and discard its index
 685          * entries by scheduling the MDL to go back to the firmware
 686          */
 687         mdl = cx18_dequeue(s, &s->q_full);
 688         if (mdl != NULL)
 689                 cx18_enqueue(s, mdl, &s->q_free);
 690 }
 691
 692 static
 693 struct cx18_queue *_cx18_stream_put_mdl_fw(struct cx18_stream *s,
 694                                            struct cx18_mdl *mdl)
 695 {
 696         struct cx18 *cx = s->cx;
 697         struct cx18_queue *q;
 698
 699         /* Don't give it to the firmware, if we're not running a capture */
 700         if (s->handle == CX18_INVALID_TASK_HANDLE ||
 701             test_bit(CX18_F_S_STOPPING, &s->s_flags) ||
 702             !test_bit(CX18_F_S_STREAMING, &s->s_flags))
 703                 return cx18_enqueue(s, mdl, &s->q_free);
 704
 705         q = cx18_enqueue(s, mdl, &s->q_busy);
 706         if (q != &s->q_busy)
 707                 return q; /* The firmware has the max MDLs it can handle */
 708
 709         cx18_mdl_sync_for_device(s, mdl);
 710         cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
 711                   (void __iomem *) &cx->scb->cpu_mdl[mdl->id] - cx->enc_mem,
 712                   s->bufs_per_mdl, mdl->id, s->mdl_size);
 713         return q;
 714 }
 715
 716 static
 717 void _cx18_stream_load_fw_queue(struct cx18_stream *s)
 718 {
 719         struct cx18_queue *q;
 720         struct cx18_mdl *mdl;
 721
 722         if (atomic_read(&s->q_free.depth) == 0 ||
 723             atomic_read(&s->q_busy.depth) >= CX18_MAX_FW_MDLS_PER_STREAM)
 724                 return;
 725
 726         /* Move from q_free to q_busy notifying the firmware, until the limit */
 727         do {
 728                 mdl = cx18_dequeue(s, &s->q_free);
 729                 if (mdl == NULL)
 730                         break;
 731                 q = _cx18_stream_put_mdl_fw(s, mdl);
 732         } while (atomic_read(&s->q_busy.depth) < CX18_MAX_FW_MDLS_PER_STREAM
 733                  && q == &s->q_busy);
 734 }
 735
 736 void cx18_out_work_handler(struct work_struct *work)
 737 {
 738         struct cx18_stream *s =
 739                          container_of(work, struct cx18_stream, out_work_order);
 740
 741         _cx18_stream_load_fw_queue(s);
 742 }
 743
 744 static void cx18_stream_configure_mdls(struct cx18_stream *s)
 745 {
 746         cx18_unload_queues(s);
 747
 748         switch (s->type) {
 749         case CX18_ENC_STREAM_TYPE_YUV:
 750                 /*
 751                  * Height should be a multiple of 32 lines.
 752                  * Set the MDL size to the exact size needed for one frame.
 753                  * Use enough buffers per MDL to cover the MDL size
 754                  */
 755                 if (s->pixelformat == V4L2_PIX_FMT_HM12)
 756                         s->mdl_size = 720 * s->cx->cxhdl.height * 3 / 2;
 757                 else
 758                         s->mdl_size = 720 * s->cx->cxhdl.height * 2;
 759                 s->bufs_per_mdl = s->mdl_size / s->buf_size;
 760                 if (s->mdl_size % s->buf_size)
 761                         s->bufs_per_mdl++;
 762                 break;
 763         case CX18_ENC_STREAM_TYPE_VBI:
 764                 s->bufs_per_mdl = 1;
 765                 if  (cx18_raw_vbi(s->cx)) {
 766                         s->mdl_size = (s->cx->is_60hz ? 12 : 18)
 767                                                        * 2 * vbi_active_samples;
 768                 } else {
 769                         /*
 770                          * See comment in cx18_vbi_setup() below about the
 771                          * extra lines we capture in sliced VBI mode due to
 772                          * the lines on which EAV RP codes toggle.
 773                         */
 774                         s->mdl_size = s->cx->is_60hz
 775                                    ? (21 - 4 + 1) * 2 * vbi_hblank_samples_60Hz
 776                                    : (23 - 2 + 1) * 2 * vbi_hblank_samples_50Hz;
 777                 }
 778                 break;
 779         default:
 780                 s->bufs_per_mdl = 1;
 781                 s->mdl_size = s->buf_size * s->bufs_per_mdl;
 782                 break;
 783         }
 784
 785         cx18_load_queues(s);
 786 }
 787
 788 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
 789 {
 790         u32 data[MAX_MB_ARGUMENTS];
 791         struct cx18 *cx = s->cx;
 792         int captype = 0;
 793         struct cx18_stream *s_idx;
 794
 795         if (!cx18_stream_enabled(s))
 796                 return -EINVAL;
 797
 798         CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
 799
 800         switch (s->type) {
 801         case CX18_ENC_STREAM_TYPE_MPG:
 802                 captype = CAPTURE_CHANNEL_TYPE_MPEG;
 803                 cx->mpg_data_received = cx->vbi_data_inserted = 0;
 804                 cx->dualwatch_jiffies = jiffies;
 805                 cx->dualwatch_stereo_mode = v4l2_ctrl_g_ctrl(cx->cxhdl.audio_mode);
 806                 cx->search_pack_header = 0;
 807                 break;
 808
 809         case CX18_ENC_STREAM_TYPE_IDX:
 810                 captype = CAPTURE_CHANNEL_TYPE_INDEX;
 811                 break;
 812         case CX18_ENC_STREAM_TYPE_TS:
 813                 captype = CAPTURE_CHANNEL_TYPE_TS;
 814                 break;
 815         case CX18_ENC_STREAM_TYPE_YUV:
 816                 captype = CAPTURE_CHANNEL_TYPE_YUV;
 817                 break;
 818         case CX18_ENC_STREAM_TYPE_PCM:
 819                 captype = CAPTURE_CHANNEL_TYPE_PCM;
 820                 break;
 821         case CX18_ENC_STREAM_TYPE_VBI:
 822 #ifdef CX18_ENCODER_PARSES_SLICED
 823                 captype = cx18_raw_vbi(cx) ?
 824                      CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
 825 #else
 826                 /*
 827                  * Currently we set things up so that Sliced VBI from the
 828                  * digitizer is handled as Raw VBI by the encoder
 829                  */
 830                 captype = CAPTURE_CHANNEL_TYPE_VBI;
 831 #endif
 832                 cx->vbi.frame = 0;
 833                 cx->vbi.inserted_frame = 0;
 834                 memset(cx->vbi.sliced_mpeg_size,
 835                         0, sizeof(cx->vbi.sliced_mpeg_size));
 836                 break;
 837         default:
 838                 return -EINVAL;
 839         }
 840
 841         /* Clear Streamoff flags in case left from last capture */
 842         clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
 843
 844         cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
 845         s->handle = data[0];
 846         cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
 847
 848         /*
 849          * For everything but CAPTURE_CHANNEL_TYPE_TS, play it safe and
 850          * set up all the parameters, as it is not obvious which parameters the
 851          * firmware shares across capture channel types and which it does not.
 852          *
 853          * Some of the cx18_vapi() calls below apply to only certain capture
 854          * channel types.  We're hoping there's no harm in calling most of them
 855          * anyway, as long as the values are all consistent.  Setting some
 856          * shared parameters will have no effect once an analog capture channel
 857          * has started streaming.
 858          */
 859         if (captype != CAPTURE_CHANNEL_TYPE_TS) {
 860                 cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
 861                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
 862                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
 863                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
 864
 865                 /*
 866                  * Audio related reset according to
 867                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
 868                  */
 869                 if (atomic_read(&cx->ana_capturing) == 0)
 870                         cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2,
 871                                   s->handle, 12);
 872
 873                 /*
 874                  * Number of lines for Field 1 & Field 2 according to
 875                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
 876                  * Field 1 is 312 for 625 line systems in BT.656
 877                  * Field 2 is 313 for 625 line systems in BT.656
 878                  */
 879                 cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
 880                           s->handle, 312, 313);
 881
 882                 if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
 883                         cx18_vbi_setup(s);
 884
 885                 /*
 886                  * Select to receive I, P, and B frame index entries, if the
 887                  * index stream is enabled.  Otherwise disable index entry
 888                  * generation.
 889                  */
 890                 s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
 891                 cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 2,
 892                                  s->handle, cx18_stream_enabled(s_idx) ? 7 : 0);
 893
 894                 /* Call out to the common CX2341x API setup for user controls */
 895                 cx->cxhdl.priv = s;
 896                 cx2341x_handler_setup(&cx->cxhdl);
 897
 898                 /*
 899                  * When starting a capture and we're set for radio,
 900                  * ensure the video is muted, despite the user control.
 901                  */
 902                 if (!cx->cxhdl.video_mute &&
 903                     test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
 904                         cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
 905                           (v4l2_ctrl_g_ctrl(cx->cxhdl.video_mute_yuv) << 8) | 1);
 906
 907                 /* Enable the Video Format Converter for UYVY 4:2:2 support,
 908                  * rather than the default HM12 Macroblovk 4:2:0 support.
 909                  */
 910                 if (captype == CAPTURE_CHANNEL_TYPE_YUV) {
 911                         if (s->pixelformat == V4L2_PIX_FMT_UYVY)
 912                                 cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2,
 913                                         s->handle, 1);
 914                         else
 915                                 /* If in doubt, default to HM12 */
 916                                 cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2,
 917                                         s->handle, 0);
 918                 }
 919         }
 920
 921         if (atomic_read(&cx->tot_capturing) == 0) {
 922                 cx2341x_handler_set_busy(&cx->cxhdl, 1);
 923                 clear_bit(CX18_F_I_EOS, &cx->i_flags);
 924                 cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
 925         }
 926
 927         cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
 928                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
 929                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
 930
 931         /* Init all the cpu_mdls for this stream */
 932         cx18_stream_configure_mdls(s);
 933         _cx18_stream_load_fw_queue(s);
 934
 935         /* begin_capture */
 936         if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
 937                 CX18_DEBUG_WARN("Error starting capture!\n");
 938                 /* Ensure we're really not capturing before releasing MDLs */
 939                 set_bit(CX18_F_S_STOPPING, &s->s_flags);
 940                 if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 941                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
 942                 else
 943                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 944                 clear_bit(CX18_F_S_STREAMING, &s->s_flags);
 945                 /* FIXME - CX18_F_S_STREAMOFF as well? */
 946                 cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 947                 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 948                 s->handle = CX18_INVALID_TASK_HANDLE;
 949                 clear_bit(CX18_F_S_STOPPING, &s->s_flags);
 950                 if (atomic_read(&cx->tot_capturing) == 0) {
 951                         set_bit(CX18_F_I_EOS, &cx->i_flags);
 952                         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
 953                 }
 954                 return -EINVAL;
 955         }
 956
 957         /* you're live! sit back and await interrupts :) */
 958         if (captype != CAPTURE_CHANNEL_TYPE_TS)
 959                 atomic_inc(&cx->ana_capturing);
 960         atomic_inc(&cx->tot_capturing);
 961         return 0;
 962 }
 963 EXPORT_SYMBOL(cx18_start_v4l2_encode_stream);
 964
 965 void cx18_stop_all_captures(struct cx18 *cx)
 966 {
 967         int i;
 968
 969         for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
 970                 struct cx18_stream *s = &cx->streams[i];
 971
 972                 if (!cx18_stream_enabled(s))
 973                         continue;
 974                 if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
 975                         cx18_stop_v4l2_encode_stream(s, 0);
 976         }
 977 }
 978
 979 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
 980 {
 981         struct cx18 *cx = s->cx;
 982
 983         if (!cx18_stream_enabled(s))
 984                 return -EINVAL;
 985
 986         /* This function assumes that you are allowed to stop the capture
 987            and that we are actually capturing */
 988
 989         CX18_DEBUG_INFO("Stop Capture\n");
 990
 991         if (atomic_read(&cx->tot_capturing) == 0)
 992                 return 0;
 993
 994         set_bit(CX18_F_S_STOPPING, &s->s_flags);
 995         if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 996                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
 997         else
 998                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 999
1000         if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
1001                 CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
1002         }
1003
1004         if (s->type != CX18_ENC_STREAM_TYPE_TS)
1005                 atomic_dec(&cx->ana_capturing);
1006         atomic_dec(&cx->tot_capturing);
1007
1008         /* Clear capture and no-read bits */
1009         clear_bit(CX18_F_S_STREAMING, &s->s_flags);
1010
1011         /* Tell the CX23418 it can't use our buffers anymore */
1012         cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
1013
1014         cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
1015         s->handle = CX18_INVALID_TASK_HANDLE;
1016         clear_bit(CX18_F_S_STOPPING, &s->s_flags);
1017
1018         if (atomic_read(&cx->tot_capturing) > 0)
1019                 return 0;
1020
1021         cx2341x_handler_set_busy(&cx->cxhdl, 0);
1022         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
1023         wake_up(&s->waitq);
1024
1025         return 0;
1026 }
1027 EXPORT_SYMBOL(cx18_stop_v4l2_encode_stream);
1028
1029 u32 cx18_find_handle(struct cx18 *cx)
1030 {
1031         int i;
1032
1033         /* find first available handle to be used for global settings */
1034         for (i = 0; i < CX18_MAX_STREAMS; i++) {
1035                 struct cx18_stream *s = &cx->streams[i];
1036
1037                 if (s->video_dev && (s->handle != CX18_INVALID_TASK_HANDLE))
1038                         return s->handle;
1039         }
1040         return CX18_INVALID_TASK_HANDLE;
1041 }
1042
1043 struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle)
1044 {
1045         int i;
1046         struct cx18_stream *s;
1047
1048         if (handle == CX18_INVALID_TASK_HANDLE)
1049                 return NULL;
1050
1051         for (i = 0; i < CX18_MAX_STREAMS; i++) {
1052                 s = &cx->streams[i];
1053                 if (s->handle != handle)
1054                         continue;
1055                 if (cx18_stream_enabled(s))
1056                         return s;
1057         }
1058         return NULL;
1059 }