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 static 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         cx18_set_funcs(s->video_dev);
 379         return 0;
 380 }
 381
 382 /* Initialize v4l2 variables and register v4l2 devices */
 383 int cx18_streams_setup(struct cx18 *cx)
 384 {
 385         int type, ret;
 386
 387         /* Setup V4L2 Devices */
 388         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 389                 /* Prepare device */
 390                 ret = cx18_prep_dev(cx, type);
 391                 if (ret < 0)
 392                         break;
 393
 394                 /* Allocate Stream */
 395                 ret = cx18_stream_alloc(&cx->streams[type]);
 396                 if (ret < 0)
 397                         break;
 398         }
 399         if (type == CX18_MAX_STREAMS)
 400                 return 0;
 401
 402         /* One or more streams could not be initialized. Clean 'em all up. */
 403         cx18_streams_cleanup(cx, 0);
 404         return ret;
 405 }
 406
 407 static int cx18_reg_dev(struct cx18 *cx, int type)
 408 {
 409         struct cx18_stream *s = &cx->streams[type];
 410         int vfl_type = cx18_stream_info[type].vfl_type;
 411         const char *name;
 412         int num, ret;
 413
 414         if (type == CX18_ENC_STREAM_TYPE_TS && s->dvb != NULL) {
 415                 ret = cx18_dvb_register(s);
 416                 if (ret < 0) {
 417                         CX18_ERR("DVB failed to register\n");
 418                         return ret;
 419                 }
 420         }
 421
 422         if (s->video_dev == NULL)
 423                 return 0;
 424
 425         num = s->video_dev->num;
 426         /* card number + user defined offset + device offset */
 427         if (type != CX18_ENC_STREAM_TYPE_MPG) {
 428                 struct cx18_stream *s_mpg = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
 429
 430                 if (s_mpg->video_dev)
 431                         num = s_mpg->video_dev->num
 432                             + cx18_stream_info[type].num_offset;
 433         }
 434         video_set_drvdata(s->video_dev, s);
 435
 436         /* Register device. First try the desired minor, then any free one. */
 437         ret = video_register_device_no_warn(s->video_dev, vfl_type, num);
 438         if (ret < 0) {
 439                 CX18_ERR("Couldn't register v4l2 device for %s (device node number %d)\n",
 440                         s->name, num);
 441                 video_device_release(s->video_dev);
 442                 s->video_dev = NULL;
 443                 return ret;
 444         }
 445
 446         name = video_device_node_name(s->video_dev);
 447
 448         switch (vfl_type) {
 449         case VFL_TYPE_GRABBER:
 450                 CX18_INFO("Registered device %s for %s (%d x %d.%02d kB)\n",
 451                           name, s->name, cx->stream_buffers[type],
 452                           cx->stream_buf_size[type] / 1024,
 453                           (cx->stream_buf_size[type] * 100 / 1024) % 100);
 454                 break;
 455
 456         case VFL_TYPE_RADIO:
 457                 CX18_INFO("Registered device %s for %s\n", name, s->name);
 458                 break;
 459
 460         case VFL_TYPE_VBI:
 461                 if (cx->stream_buffers[type])
 462                         CX18_INFO("Registered device %s for %s "
 463                                   "(%d x %d bytes)\n",
 464                                   name, s->name, cx->stream_buffers[type],
 465                                   cx->stream_buf_size[type]);
 466                 else
 467                         CX18_INFO("Registered device %s for %s\n",
 468                                 name, s->name);
 469                 break;
 470         }
 471
 472         return 0;
 473 }
 474
 475 /* Register v4l2 devices */
 476 int cx18_streams_register(struct cx18 *cx)
 477 {
 478         int type;
 479         int err;
 480         int ret = 0;
 481
 482         /* Register V4L2 devices */
 483         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 484                 err = cx18_reg_dev(cx, type);
 485                 if (err && ret == 0)
 486                         ret = err;
 487         }
 488
 489         if (ret == 0)
 490                 return 0;
 491
 492         /* One or more streams could not be initialized. Clean 'em all up. */
 493         cx18_streams_cleanup(cx, 1);
 494         return ret;
 495 }
 496
 497 /* Unregister v4l2 devices */
 498 void cx18_streams_cleanup(struct cx18 *cx, int unregister)
 499 {
 500         struct video_device *vdev;
 501         int type;
 502
 503         /* Teardown all streams */
 504         for (type = 0; type < CX18_MAX_STREAMS; type++) {
 505
 506                 /* The TS has a cx18_dvb structure, not a video_device */
 507                 if (type == CX18_ENC_STREAM_TYPE_TS) {
 508                         if (cx->streams[type].dvb != NULL) {
 509                                 if (unregister)
 510                                         cx18_dvb_unregister(&cx->streams[type]);
 511                                 kfree(cx->streams[type].dvb);
 512                                 cx->streams[type].dvb = NULL;
 513                                 cx18_stream_free(&cx->streams[type]);
 514                         }
 515                         continue;
 516                 }
 517
 518                 /* No struct video_device, but can have buffers allocated */
 519                 if (type == CX18_ENC_STREAM_TYPE_IDX) {
 520                         /* If the module params didn't inhibit IDX ... */
 521                         if (cx->stream_buffers[type] != 0) {
 522                                 cx->stream_buffers[type] = 0;
 523                                 /*
 524                                  * Before calling cx18_stream_free(),
 525                                  * check if the IDX stream was actually set up.
 526                                  * Needed, since the cx18_probe() error path
 527                                  * exits through here as well as normal clean up
 528                                  */
 529                                 if (cx->streams[type].buffers != 0)
 530                                         cx18_stream_free(&cx->streams[type]);
 531                         }
 532                         continue;
 533                 }
 534
 535                 /* If struct video_device exists, can have buffers allocated */
 536                 vdev = cx->streams[type].video_dev;
 537
 538                 cx->streams[type].video_dev = NULL;
 539                 if (vdev == NULL)
 540                         continue;
 541
 542                 if (type == CX18_ENC_STREAM_TYPE_YUV)
 543                         videobuf_mmap_free(&cx->streams[type].vbuf_q);
 544
 545                 cx18_stream_free(&cx->streams[type]);
 546
 547                 /* Unregister or release device */
 548                 if (unregister)
 549                         video_unregister_device(vdev);
 550                 else
 551                         video_device_release(vdev);
 552         }
 553 }
 554
 555 static void cx18_vbi_setup(struct cx18_stream *s)
 556 {
 557         struct cx18 *cx = s->cx;
 558         int raw = cx18_raw_vbi(cx);
 559         u32 data[CX2341X_MBOX_MAX_DATA];
 560         int lines;
 561
 562         if (cx->is_60hz) {
 563                 cx->vbi.count = 12;
 564                 cx->vbi.start[0] = 10;
 565                 cx->vbi.start[1] = 273;
 566         } else {        /* PAL/SECAM */
 567                 cx->vbi.count = 18;
 568                 cx->vbi.start[0] = 6;
 569                 cx->vbi.start[1] = 318;
 570         }
 571
 572         /* setup VBI registers */
 573         if (raw)
 574                 v4l2_subdev_call(cx->sd_av, vbi, s_raw_fmt, &cx->vbi.in.fmt.vbi);
 575         else
 576                 v4l2_subdev_call(cx->sd_av, vbi, s_sliced_fmt, &cx->vbi.in.fmt.sliced);
 577
 578         /*
 579          * Send the CX18_CPU_SET_RAW_VBI_PARAM API command to setup Encoder Raw
 580          * VBI when the first analog capture channel starts, as once it starts
 581          * (e.g. MPEG), we can't effect any change in the Encoder Raw VBI setup
 582          * (i.e. for the VBI capture channels).  We also send it for each
 583          * analog capture channel anyway just to make sure we get the proper
 584          * behavior
 585          */
 586         if (raw) {
 587                 lines = cx->vbi.count * 2;
 588         } else {
 589                 /*
 590                  * For 525/60 systems, according to the VIP 2 & BT.656 std:
 591                  * The EAV RP code's Field bit toggles on line 4, a few lines
 592                  * after the Vertcal Blank bit has already toggled.
 593                  * Tell the encoder to capture 21-4+1=18 lines per field,
 594                  * since we want lines 10 through 21.
 595                  *
 596                  * For 625/50 systems, according to the VIP 2 & BT.656 std:
 597                  * The EAV RP code's Field bit toggles on line 1, a few lines
 598                  * after the Vertcal Blank bit has already toggled.
 599                  * (We've actually set the digitizer so that the Field bit
 600                  * toggles on line 2.) Tell the encoder to capture 23-2+1=22
 601                  * lines per field, since we want lines 6 through 23.
 602                  */
 603                 lines = cx->is_60hz ? (21 - 4 + 1) * 2 : (23 - 2 + 1) * 2;
 604         }
 605
 606         data[0] = s->handle;
 607         /* Lines per field */
 608         data[1] = (lines / 2) | ((lines / 2) << 16);
 609         /* bytes per line */
 610         data[2] = (raw ? vbi_active_samples
 611                        : (cx->is_60hz ? vbi_hblank_samples_60Hz
 612                                       : vbi_hblank_samples_50Hz));
 613         /* Every X number of frames a VBI interrupt arrives
 614            (frames as in 25 or 30 fps) */
 615         data[3] = 1;
 616         /*
 617          * Set the SAV/EAV RP codes to look for as start/stop points
 618          * when in VIP-1.1 mode
 619          */
 620         if (raw) {
 621                 /*
 622                  * Start codes for beginning of "active" line in vertical blank
 623                  * 0x20 (               VerticalBlank                )
 624                  * 0x60 (     EvenField VerticalBlank                )
 625                  */
 626                 data[4] = 0x20602060;
 627                 /*
 628                  * End codes for end of "active" raw lines and regular lines
 629                  * 0x30 (               VerticalBlank HorizontalBlank)
 630                  * 0x70 (     EvenField VerticalBlank HorizontalBlank)
 631                  * 0x90 (Task                         HorizontalBlank)
 632                  * 0xd0 (Task EvenField               HorizontalBlank)
 633                  */
 634                 data[5] = 0x307090d0;
 635         } else {
 636                 /*
 637                  * End codes for active video, we want data in the hblank region
 638                  * 0xb0 (Task         0 VerticalBlank HorizontalBlank)
 639                  * 0xf0 (Task EvenField VerticalBlank HorizontalBlank)
 640                  *
 641                  * Since the V bit is only allowed to toggle in the EAV RP code,
 642                  * just before the first active region line, these two
 643                  * are problematic:
 644                  * 0x90 (Task                         HorizontalBlank)
 645                  * 0xd0 (Task EvenField               HorizontalBlank)
 646                  *
 647                  * We have set the digitzer such that we don't have to worry
 648                  * about these problem codes.
 649                  */
 650                 data[4] = 0xB0F0B0F0;
 651                 /*
 652                  * Start codes for beginning of active line in vertical blank
 653                  * 0xa0 (Task           VerticalBlank                )
 654                  * 0xe0 (Task EvenField VerticalBlank                )
 655                  */
 656                 data[5] = 0xA0E0A0E0;
 657         }
 658
 659         CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
 660                         data[0], data[1], data[2], data[3], data[4], data[5]);
 661
 662         cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
 663 }
 664
 665 void cx18_stream_rotate_idx_mdls(struct cx18 *cx)
 666 {
 667         struct cx18_stream *s = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
 668         struct cx18_mdl *mdl;
 669
 670         if (!cx18_stream_enabled(s))
 671                 return;
 672
 673         /* Return if the firmware is not running low on MDLs */
 674         if ((atomic_read(&s->q_free.depth) + atomic_read(&s->q_busy.depth)) >=
 675                                             CX18_ENC_STREAM_TYPE_IDX_FW_MDL_MIN)
 676                 return;
 677
 678         /* Return if there are no MDLs to rotate back to the firmware */
 679         if (atomic_read(&s->q_full.depth) < 2)
 680                 return;
 681
 682         /*
 683          * Take the oldest IDX MDL still holding data, and discard its index
 684          * entries by scheduling the MDL to go back to the firmware
 685          */
 686         mdl = cx18_dequeue(s, &s->q_full);
 687         if (mdl != NULL)
 688                 cx18_enqueue(s, mdl, &s->q_free);
 689 }
 690
 691 static
 692 struct cx18_queue *_cx18_stream_put_mdl_fw(struct cx18_stream *s,
 693                                            struct cx18_mdl *mdl)
 694 {
 695         struct cx18 *cx = s->cx;
 696         struct cx18_queue *q;
 697
 698         /* Don't give it to the firmware, if we're not running a capture */
 699         if (s->handle == CX18_INVALID_TASK_HANDLE ||
 700             test_bit(CX18_F_S_STOPPING, &s->s_flags) ||
 701             !test_bit(CX18_F_S_STREAMING, &s->s_flags))
 702                 return cx18_enqueue(s, mdl, &s->q_free);
 703
 704         q = cx18_enqueue(s, mdl, &s->q_busy);
 705         if (q != &s->q_busy)
 706                 return q; /* The firmware has the max MDLs it can handle */
 707
 708         cx18_mdl_sync_for_device(s, mdl);
 709         cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
 710                   (void __iomem *) &cx->scb->cpu_mdl[mdl->id] - cx->enc_mem,
 711                   s->bufs_per_mdl, mdl->id, s->mdl_size);
 712         return q;
 713 }
 714
 715 static
 716 void _cx18_stream_load_fw_queue(struct cx18_stream *s)
 717 {
 718         struct cx18_queue *q;
 719         struct cx18_mdl *mdl;
 720
 721         if (atomic_read(&s->q_free.depth) == 0 ||
 722             atomic_read(&s->q_busy.depth) >= CX18_MAX_FW_MDLS_PER_STREAM)
 723                 return;
 724
 725         /* Move from q_free to q_busy notifying the firmware, until the limit */
 726         do {
 727                 mdl = cx18_dequeue(s, &s->q_free);
 728                 if (mdl == NULL)
 729                         break;
 730                 q = _cx18_stream_put_mdl_fw(s, mdl);
 731         } while (atomic_read(&s->q_busy.depth) < CX18_MAX_FW_MDLS_PER_STREAM
 732                  && q == &s->q_busy);
 733 }
 734
 735 void cx18_out_work_handler(struct work_struct *work)
 736 {
 737         struct cx18_stream *s =
 738                          container_of(work, struct cx18_stream, out_work_order);
 739
 740         _cx18_stream_load_fw_queue(s);
 741 }
 742
 743 static void cx18_stream_configure_mdls(struct cx18_stream *s)
 744 {
 745         cx18_unload_queues(s);
 746
 747         switch (s->type) {
 748         case CX18_ENC_STREAM_TYPE_YUV:
 749                 /*
 750                  * Height should be a multiple of 32 lines.
 751                  * Set the MDL size to the exact size needed for one frame.
 752                  * Use enough buffers per MDL to cover the MDL size
 753                  */
 754                 if (s->pixelformat == V4L2_PIX_FMT_HM12)
 755                         s->mdl_size = 720 * s->cx->cxhdl.height * 3 / 2;
 756                 else
 757                         s->mdl_size = 720 * s->cx->cxhdl.height * 2;
 758                 s->bufs_per_mdl = s->mdl_size / s->buf_size;
 759                 if (s->mdl_size % s->buf_size)
 760                         s->bufs_per_mdl++;
 761                 break;
 762         case CX18_ENC_STREAM_TYPE_VBI:
 763                 s->bufs_per_mdl = 1;
 764                 if  (cx18_raw_vbi(s->cx)) {
 765                         s->mdl_size = (s->cx->is_60hz ? 12 : 18)
 766                                                        * 2 * vbi_active_samples;
 767                 } else {
 768                         /*
 769                          * See comment in cx18_vbi_setup() below about the
 770                          * extra lines we capture in sliced VBI mode due to
 771                          * the lines on which EAV RP codes toggle.
 772                         */
 773                         s->mdl_size = s->cx->is_60hz
 774                                    ? (21 - 4 + 1) * 2 * vbi_hblank_samples_60Hz
 775                                    : (23 - 2 + 1) * 2 * vbi_hblank_samples_50Hz;
 776                 }
 777                 break;
 778         default:
 779                 s->bufs_per_mdl = 1;
 780                 s->mdl_size = s->buf_size * s->bufs_per_mdl;
 781                 break;
 782         }
 783
 784         cx18_load_queues(s);
 785 }
 786
 787 int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
 788 {
 789         u32 data[MAX_MB_ARGUMENTS];
 790         struct cx18 *cx = s->cx;
 791         int captype = 0;
 792         struct cx18_stream *s_idx;
 793
 794         if (!cx18_stream_enabled(s))
 795                 return -EINVAL;
 796
 797         CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
 798
 799         switch (s->type) {
 800         case CX18_ENC_STREAM_TYPE_MPG:
 801                 captype = CAPTURE_CHANNEL_TYPE_MPEG;
 802                 cx->mpg_data_received = cx->vbi_data_inserted = 0;
 803                 cx->dualwatch_jiffies = jiffies;
 804                 cx->dualwatch_stereo_mode = v4l2_ctrl_g_ctrl(cx->cxhdl.audio_mode);
 805                 cx->search_pack_header = 0;
 806                 break;
 807
 808         case CX18_ENC_STREAM_TYPE_IDX:
 809                 captype = CAPTURE_CHANNEL_TYPE_INDEX;
 810                 break;
 811         case CX18_ENC_STREAM_TYPE_TS:
 812                 captype = CAPTURE_CHANNEL_TYPE_TS;
 813                 break;
 814         case CX18_ENC_STREAM_TYPE_YUV:
 815                 captype = CAPTURE_CHANNEL_TYPE_YUV;
 816                 break;
 817         case CX18_ENC_STREAM_TYPE_PCM:
 818                 captype = CAPTURE_CHANNEL_TYPE_PCM;
 819                 break;
 820         case CX18_ENC_STREAM_TYPE_VBI:
 821 #ifdef CX18_ENCODER_PARSES_SLICED
 822                 captype = cx18_raw_vbi(cx) ?
 823                      CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
 824 #else
 825                 /*
 826                  * Currently we set things up so that Sliced VBI from the
 827                  * digitizer is handled as Raw VBI by the encoder
 828                  */
 829                 captype = CAPTURE_CHANNEL_TYPE_VBI;
 830 #endif
 831                 cx->vbi.frame = 0;
 832                 cx->vbi.inserted_frame = 0;
 833                 memset(cx->vbi.sliced_mpeg_size,
 834                         0, sizeof(cx->vbi.sliced_mpeg_size));
 835                 break;
 836         default:
 837                 return -EINVAL;
 838         }
 839
 840         /* Clear Streamoff flags in case left from last capture */
 841         clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
 842
 843         cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
 844         s->handle = data[0];
 845         cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
 846
 847         /*
 848          * For everything but CAPTURE_CHANNEL_TYPE_TS, play it safe and
 849          * set up all the parameters, as it is not obvious which parameters the
 850          * firmware shares across capture channel types and which it does not.
 851          *
 852          * Some of the cx18_vapi() calls below apply to only certain capture
 853          * channel types.  We're hoping there's no harm in calling most of them
 854          * anyway, as long as the values are all consistent.  Setting some
 855          * shared parameters will have no effect once an analog capture channel
 856          * has started streaming.
 857          */
 858         if (captype != CAPTURE_CHANNEL_TYPE_TS) {
 859                 cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
 860                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
 861                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
 862                 cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
 863
 864                 /*
 865                  * Audio related reset according to
 866                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
 867                  */
 868                 if (atomic_read(&cx->ana_capturing) == 0)
 869                         cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2,
 870                                   s->handle, 12);
 871
 872                 /*
 873                  * Number of lines for Field 1 & Field 2 according to
 874                  * Documentation/video4linux/cx2341x/fw-encoder-api.txt
 875                  * Field 1 is 312 for 625 line systems in BT.656
 876                  * Field 2 is 313 for 625 line systems in BT.656
 877                  */
 878                 cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
 879                           s->handle, 312, 313);
 880
 881                 if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
 882                         cx18_vbi_setup(s);
 883
 884                 /*
 885                  * Select to receive I, P, and B frame index entries, if the
 886                  * index stream is enabled.  Otherwise disable index entry
 887                  * generation.
 888                  */
 889                 s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
 890                 cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 2,
 891                                  s->handle, cx18_stream_enabled(s_idx) ? 7 : 0);
 892
 893                 /* Call out to the common CX2341x API setup for user controls */
 894                 cx->cxhdl.priv = s;
 895                 cx2341x_handler_setup(&cx->cxhdl);
 896
 897                 /*
 898                  * When starting a capture and we're set for radio,
 899                  * ensure the video is muted, despite the user control.
 900                  */
 901                 if (!cx->cxhdl.video_mute &&
 902                     test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
 903                         cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
 904                           (v4l2_ctrl_g_ctrl(cx->cxhdl.video_mute_yuv) << 8) | 1);
 905
 906                 /* Enable the Video Format Converter for UYVY 4:2:2 support,
 907                  * rather than the default HM12 Macroblovk 4:2:0 support.
 908                  */
 909                 if (captype == CAPTURE_CHANNEL_TYPE_YUV) {
 910                         if (s->pixelformat == V4L2_PIX_FMT_UYVY)
 911                                 cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2,
 912                                         s->handle, 1);
 913                         else
 914                                 /* If in doubt, default to HM12 */
 915                                 cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2,
 916                                         s->handle, 0);
 917                 }
 918         }
 919
 920         if (atomic_read(&cx->tot_capturing) == 0) {
 921                 cx2341x_handler_set_busy(&cx->cxhdl, 1);
 922                 clear_bit(CX18_F_I_EOS, &cx->i_flags);
 923                 cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
 924         }
 925
 926         cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
 927                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
 928                 (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
 929
 930         /* Init all the cpu_mdls for this stream */
 931         cx18_stream_configure_mdls(s);
 932         _cx18_stream_load_fw_queue(s);
 933
 934         /* begin_capture */
 935         if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
 936                 CX18_DEBUG_WARN("Error starting capture!\n");
 937                 /* Ensure we're really not capturing before releasing MDLs */
 938                 set_bit(CX18_F_S_STOPPING, &s->s_flags);
 939                 if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 940                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
 941                 else
 942                         cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 943                 clear_bit(CX18_F_S_STREAMING, &s->s_flags);
 944                 /* FIXME - CX18_F_S_STREAMOFF as well? */
 945                 cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 946                 cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 947                 s->handle = CX18_INVALID_TASK_HANDLE;
 948                 clear_bit(CX18_F_S_STOPPING, &s->s_flags);
 949                 if (atomic_read(&cx->tot_capturing) == 0) {
 950                         set_bit(CX18_F_I_EOS, &cx->i_flags);
 951                         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
 952                 }
 953                 return -EINVAL;
 954         }
 955
 956         /* you're live! sit back and await interrupts :) */
 957         if (captype != CAPTURE_CHANNEL_TYPE_TS)
 958                 atomic_inc(&cx->ana_capturing);
 959         atomic_inc(&cx->tot_capturing);
 960         return 0;
 961 }
 962 EXPORT_SYMBOL(cx18_start_v4l2_encode_stream);
 963
 964 void cx18_stop_all_captures(struct cx18 *cx)
 965 {
 966         int i;
 967
 968         for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
 969                 struct cx18_stream *s = &cx->streams[i];
 970
 971                 if (!cx18_stream_enabled(s))
 972                         continue;
 973                 if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
 974                         cx18_stop_v4l2_encode_stream(s, 0);
 975         }
 976 }
 977
 978 int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
 979 {
 980         struct cx18 *cx = s->cx;
 981
 982         if (!cx18_stream_enabled(s))
 983                 return -EINVAL;
 984
 985         /* This function assumes that you are allowed to stop the capture
 986            and that we are actually capturing */
 987
 988         CX18_DEBUG_INFO("Stop Capture\n");
 989
 990         if (atomic_read(&cx->tot_capturing) == 0)
 991                 return 0;
 992
 993         set_bit(CX18_F_S_STOPPING, &s->s_flags);
 994         if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 995                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
 996         else
 997                 cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 998
 999         if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
1000                 CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
1001         }
1002
1003         if (s->type != CX18_ENC_STREAM_TYPE_TS)
1004                 atomic_dec(&cx->ana_capturing);
1005         atomic_dec(&cx->tot_capturing);
1006
1007         /* Clear capture and no-read bits */
1008         clear_bit(CX18_F_S_STREAMING, &s->s_flags);
1009
1010         /* Tell the CX23418 it can't use our buffers anymore */
1011         cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
1012
1013         cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
1014         s->handle = CX18_INVALID_TASK_HANDLE;
1015         clear_bit(CX18_F_S_STOPPING, &s->s_flags);
1016
1017         if (atomic_read(&cx->tot_capturing) > 0)
1018                 return 0;
1019
1020         cx2341x_handler_set_busy(&cx->cxhdl, 0);
1021         cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
1022         wake_up(&s->waitq);
1023
1024         return 0;
1025 }
1026 EXPORT_SYMBOL(cx18_stop_v4l2_encode_stream);
1027
1028 u32 cx18_find_handle(struct cx18 *cx)
1029 {
1030         int i;
1031
1032         /* find first available handle to be used for global settings */
1033         for (i = 0; i < CX18_MAX_STREAMS; i++) {
1034                 struct cx18_stream *s = &cx->streams[i];
1035
1036                 if (s->video_dev && (s->handle != CX18_INVALID_TASK_HANDLE))
1037                         return s->handle;
1038         }
1039         return CX18_INVALID_TASK_HANDLE;
1040 }
1041
1042 struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle)
1043 {
1044         int i;
1045         struct cx18_stream *s;
1046
1047         if (handle == CX18_INVALID_TASK_HANDLE)
1048                 return NULL;
1049
1050         for (i = 0; i < CX18_MAX_STREAMS; i++) {
1051                 s = &cx->streams[i];
1052                 if (s->handle != handle)
1053                         continue;
1054                 if (cx18_stream_enabled(s))
1055                         return s;
1056         }
1057         return NULL;
1058 }