linux/drivers/media/pci/cx18/cx18-streams.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 *  cx18 init/start/stop/exit stream functions
   4 *
   5 *  Derived from ivtv-streams.c
   6 *
   7 *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
   8 *  Copyright (C) 2008  Andy Walls <awalls@md.metrocast.net>
   9 */
  10
  11#include "cx18-driver.h"
  12#include "cx18-io.h"
  13#include "cx18-fileops.h"
  14#include "cx18-mailbox.h"
  15#include "cx18-i2c.h"
  16#include "cx18-queue.h"
  17#include "cx18-ioctl.h"
  18#include "cx18-streams.h"
  19#include "cx18-cards.h"
  20#include "cx18-scb.h"
  21#include "cx18-dvb.h"
  22
  23#define CX18_DSP0_INTERRUPT_MASK        0xd0004C
  24
  25static const struct v4l2_file_operations cx18_v4l2_enc_fops = {
  26        .owner = THIS_MODULE,
  27        .read = cx18_v4l2_read,
  28        .open = cx18_v4l2_open,
  29        .unlocked_ioctl = video_ioctl2,
  30        .release = cx18_v4l2_close,
  31        .poll = cx18_v4l2_enc_poll,
  32        .mmap = cx18_v4l2_mmap,
  33};
  34
  35/* offset from 0 to register ts v4l2 minors on */
  36#define CX18_V4L2_ENC_TS_OFFSET   16
  37/* offset from 0 to register pcm v4l2 minors on */
  38#define CX18_V4L2_ENC_PCM_OFFSET  24
  39/* offset from 0 to register yuv v4l2 minors on */
  40#define CX18_V4L2_ENC_YUV_OFFSET  32
  41
  42static struct {
  43        const char *name;
  44        int vfl_type;
  45        int num_offset;
  46        int dma;
  47        u32 caps;
  48} cx18_stream_info[] = {
  49        {       /* CX18_ENC_STREAM_TYPE_MPG */
  50                "encoder MPEG",
  51                VFL_TYPE_GRABBER, 0,
  52                PCI_DMA_FROMDEVICE,
  53                V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
  54                V4L2_CAP_AUDIO | V4L2_CAP_TUNER
  55        },
  56        {       /* CX18_ENC_STREAM_TYPE_TS */
  57                "TS",
  58                VFL_TYPE_GRABBER, -1,
  59                PCI_DMA_FROMDEVICE,
  60        },
  61        {       /* CX18_ENC_STREAM_TYPE_YUV */
  62                "encoder YUV",
  63                VFL_TYPE_GRABBER, CX18_V4L2_ENC_YUV_OFFSET,
  64                PCI_DMA_FROMDEVICE,
  65                V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
  66                V4L2_CAP_STREAMING | V4L2_CAP_AUDIO | V4L2_CAP_TUNER
  67        },
  68        {       /* CX18_ENC_STREAM_TYPE_VBI */
  69                "encoder VBI",
  70                VFL_TYPE_VBI, 0,
  71                PCI_DMA_FROMDEVICE,
  72                V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE |
  73                V4L2_CAP_READWRITE | V4L2_CAP_TUNER
  74        },
  75        {       /* CX18_ENC_STREAM_TYPE_PCM */
  76                "encoder PCM audio",
  77                VFL_TYPE_GRABBER, CX18_V4L2_ENC_PCM_OFFSET,
  78                PCI_DMA_FROMDEVICE,
  79                V4L2_CAP_TUNER | V4L2_CAP_AUDIO | V4L2_CAP_READWRITE,
  80        },
  81        {       /* CX18_ENC_STREAM_TYPE_IDX */
  82                "encoder IDX",
  83                VFL_TYPE_GRABBER, -1,
  84                PCI_DMA_FROMDEVICE,
  85        },
  86        {       /* CX18_ENC_STREAM_TYPE_RAD */
  87                "encoder radio",
  88                VFL_TYPE_RADIO, 0,
  89                PCI_DMA_NONE,
  90                V4L2_CAP_RADIO | V4L2_CAP_TUNER
  91        },
  92};
  93
  94
  95static void cx18_dma_free(struct videobuf_queue *q,
  96        struct cx18_stream *s, struct cx18_videobuf_buffer *buf)
  97{
  98        videobuf_waiton(q, &buf->vb, 0, 0);
  99        videobuf_vmalloc_free(&buf->vb);
 100        buf->vb.state = VIDEOBUF_NEEDS_INIT;
 101}
 102
 103static int cx18_prepare_buffer(struct videobuf_queue *q,
 104        struct cx18_stream *s,
 105        struct cx18_videobuf_buffer *buf,
 106        u32 pixelformat,
 107        unsigned int width, unsigned int height,
 108        enum v4l2_field field)
 109{
 110        struct cx18 *cx = s->cx;
 111        int rc = 0;
 112
 113        /* check settings */
 114        buf->bytes_used = 0;
 115
 116        if ((width  < 48) || (height < 32))
 117                return -EINVAL;
 118
 119        buf->vb.size = (width * height * 2);
 120        if ((buf->vb.baddr != 0) && (buf->vb.bsize < buf->vb.size))
 121                return -EINVAL;
 122
 123        /* alloc + fill struct (if changed) */
 124        if (buf->vb.width != width || buf->vb.height != height ||
 125            buf->vb.field != field || s->pixelformat != pixelformat ||
 126            buf->tvnorm != cx->std) {
 127
 128                buf->vb.width  = width;
 129                buf->vb.height = height;
 130                buf->vb.field  = field;
 131                buf->tvnorm    = cx->std;
 132                s->pixelformat = pixelformat;
 133
 134                /* HM12 YUV size is (Y=(h*720) + UV=(h*(720/2)))
 135                   UYUV YUV size is (Y=(h*720) + UV=(h*(720))) */
 136                if (s->pixelformat == V4L2_PIX_FMT_HM12)
 137                        s->vb_bytes_per_frame = height * 720 * 3 / 2;
 138                else
 139                        s->vb_bytes_per_frame = height * 720 * 2;
 140                cx18_dma_free(q, s, buf);
 141        }
 142
 143        if ((buf->vb.baddr != 0) && (buf->vb.bsize < buf->vb.size))
 144                return -EINVAL;
 145
 146        if (buf->vb.field == 0)
 147                buf->vb.field = V4L2_FIELD_INTERLACED;
 148
 149        if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
 150                buf->vb.width  = width;
 151                buf->vb.height = height;
 152                buf->vb.field  = field;
 153                buf->tvnorm    = cx->std;
 154                s->pixelformat = pixelformat;
 155
 156                /* HM12 YUV size is (Y=(h*720) + UV=(h*(720/2)))
 157                   UYUV YUV size is (Y=(h*720) + UV=(h*(720))) */
 158                if (s->pixelformat == V4L2_PIX_FMT_HM12)
 159                        s->vb_bytes_per_frame = height * 720 * 3 / 2;
 160                else
 161                        s->vb_bytes_per_frame = height * 720 * 2;
 162                rc = videobuf_iolock(q, &buf->vb, NULL);
 163                if (rc != 0)
 164                        goto fail;
 165        }
 166        buf->vb.state = VIDEOBUF_PREPARED;
 167        return 0;
 168
 169fail:
 170        cx18_dma_free(q, s, buf);
 171        return rc;
 172
 173}
 174
 175/* VB_MIN_BUFSIZE is lcm(1440 * 480, 1440 * 576)
 176   1440 is a single line of 4:2:2 YUV at 720 luma samples wide
 177*/
 178#define VB_MIN_BUFFERS 32
 179#define VB_MIN_BUFSIZE 4147200
 180
 181static int buffer_setup(struct videobuf_queue *q,
 182        unsigned int *count, unsigned int *size)
 183{
 184        struct cx18_stream *s = q->priv_data;
 185        struct cx18 *cx = s->cx;
 186
 187        *size = 2 * cx->cxhdl.width * cx->cxhdl.height;
 188        if (*count == 0)
 189                *count = VB_MIN_BUFFERS;
 190
 191        while (*size * *count > VB_MIN_BUFFERS * VB_MIN_BUFSIZE)
 192                (*count)--;
 193
 194        q->field = V4L2_FIELD_INTERLACED;
 195        q->last = V4L2_FIELD_INTERLACED;
 196
 197        return 0;
 198}
 199
 200static int buffer_prepare(struct videobuf_queue *q,
 201        struct videobuf_buffer *vb,
 202        enum v4l2_field field)
 203{
 204        struct cx18_videobuf_buffer *buf =
 205                container_of(vb, struct cx18_videobuf_buffer, vb);
 206        struct cx18_stream *s = q->priv_data;
 207        struct cx18 *cx = s->cx;
 208
 209        return cx18_prepare_buffer(q, s, buf, s->pixelformat,
 210                cx->cxhdl.width, cx->cxhdl.height, field);
 211}
 212
 213static void buffer_release(struct videobuf_queue *q,
 214        struct videobuf_buffer *vb)
 215{
 216        struct cx18_videobuf_buffer *buf =
 217                container_of(vb, struct cx18_videobuf_buffer, vb);
 218        struct cx18_stream *s = q->priv_data;
 219
 220        cx18_dma_free(q, s, buf);
 221}
 222
 223static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
 224{
 225        struct cx18_videobuf_buffer *buf =
 226                container_of(vb, struct cx18_videobuf_buffer, vb);
 227        struct cx18_stream *s = q->priv_data;
 228
 229        buf->vb.state = VIDEOBUF_QUEUED;
 230
 231        list_add_tail(&buf->vb.queue, &s->vb_capture);
 232}
 233
 234static const struct videobuf_queue_ops cx18_videobuf_qops = {
 235        .buf_setup    = buffer_setup,
 236        .buf_prepare  = buffer_prepare,
 237        .buf_queue    = buffer_queue,
 238        .buf_release  = buffer_release,
 239};
 240
 241static void cx18_stream_init(struct cx18 *cx, int type)
 242{
 243        struct cx18_stream *s = &cx->streams[type];
 244
 245        memset(s, 0, sizeof(*s));
 246
 247        /* initialize cx18_stream fields */
 248        s->dvb = NULL;
 249        s->cx = cx;
 250        s->type = type;
 251        s->name = cx18_stream_info[type].name;
 252        s->handle = CX18_INVALID_TASK_HANDLE;
 253
 254        s->dma = cx18_stream_info[type].dma;
 255        s->v4l2_dev_caps = cx18_stream_info[type].caps;
 256        s->buffers = cx->stream_buffers[type];
 257        s->buf_size = cx->stream_buf_size[type];
 258        INIT_LIST_HEAD(&s->buf_pool);
 259        s->bufs_per_mdl = 1;
 260        s->mdl_size = s->buf_size * s->bufs_per_mdl;
 261
 262        init_waitqueue_head(&s->waitq);
 263        s->id = -1;
 264        spin_lock_init(&s->q_free.lock);
 265        cx18_queue_init(&s->q_free);
 266        spin_lock_init(&s->q_busy.lock);
 267        cx18_queue_init(&s->q_busy);
 268        spin_lock_init(&s->q_full.lock);
 269        cx18_queue_init(&s->q_full);
 270        spin_lock_init(&s->q_idle.lock);
 271        cx18_queue_init(&s->q_idle);
 272
 273        INIT_WORK(&s->out_work_order, cx18_out_work_handler);
 274
 275        INIT_LIST_HEAD(&s->vb_capture);
 276        timer_setup(&s->vb_timeout, cx18_vb_timeout, 0);
 277        spin_lock_init(&s->vb_lock);
 278        if (type == CX18_ENC_STREAM_TYPE_YUV) {
 279                spin_lock_init(&s->vbuf_q_lock);
 280
 281                s->vb_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 282                videobuf_queue_vmalloc_init(&s->vbuf_q, &cx18_videobuf_qops,
 283                        &cx->pci_dev->dev, &s->vbuf_q_lock,
 284                        V4L2_BUF_TYPE_VIDEO_CAPTURE,
 285                        V4L2_FIELD_INTERLACED,
 286                        sizeof(struct cx18_videobuf_buffer),
 287                        s, &cx->serialize_lock);
 288
 289                /* Assume the previous pixel default */
 290                s->pixelformat = V4L2_PIX_FMT_HM12;
 291                s->vb_bytes_per_frame = cx->cxhdl.height * 720 * 3 / 2;
 292                s->vb_bytes_per_line = 720;
 293        }
 294}
 295
 296static int cx18_prep_dev(struct cx18 *cx, int type)
 297{
 298        struct cx18_stream *s = &cx->streams[type];
 299        u32 cap = cx->v4l2_cap;
 300        int num_offset = cx18_stream_info[type].num_offset;
 301        int num = cx->instance + cx18_first_minor + num_offset;
 302
 303        /*
 304         * These five fields are always initialized.
 305         * For analog capture related streams, if video_dev.v4l2_dev == NULL then the
 306         * stream is not in use.
 307         * For the TS stream, if dvb == NULL then the stream is not in use.
 308         * In those cases no other fields but these four can be used.
 309         */
 310        s->video_dev.v4l2_dev = NULL;
 311        s->dvb = NULL;
 312        s->cx = cx;
 313        s->type = type;
 314        s->name = cx18_stream_info[type].name;
 315
 316        /* Check whether the radio is supported */
 317        if (type == CX18_ENC_STREAM_TYPE_RAD && !(cap & V4L2_CAP_RADIO))
 318                return 0;
 319
 320        /* Check whether VBI is supported */
 321        if (type == CX18_ENC_STREAM_TYPE_VBI &&
 322            !(cap & (V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)))
 323                return 0;
 324
 325        /* User explicitly selected 0 buffers for these streams, so don't
 326           create them. */
 327        if (cx18_stream_info[type].dma != PCI_DMA_NONE &&
 328            cx->stream_buffers[type] == 0) {
 329                CX18_INFO("Disabled %s device\n", cx18_stream_info[type].name);
 330                return 0;
 331        }
 332
 333        cx18_stream_init(cx, type);
 334
 335        /* Allocate the cx18_dvb struct only for the TS on cards with DTV */
 336        if (type == CX18_ENC_STREAM_TYPE_TS) {
 337                if (cx->card->hw_all & CX18_HW_DVB) {
 338                        s->dvb = kzalloc(sizeof(struct cx18_dvb), GFP_KERNEL);
 339                        if (s->dvb == NULL) {
 340                                CX18_ERR("Couldn't allocate cx18_dvb structure for %s\n",
 341                                         s->name);
 342                                return -ENOMEM;
 343                        }
 344                } else {
 345                        /* Don't need buffers for the TS, if there is no DVB */
 346                        s->buffers = 0;
 347                }
 348        }
 349
 350        if (num_offset == -1)
 351                return 0;
 352
 353        /* initialize the v4l2 video device structure */
 354        snprintf(s->video_dev.name, sizeof(s->video_dev.name), "%s %s",
 355                 cx->v4l2_dev.name, s->name);
 356
 357        s->video_dev.num = num;
 358        s->video_dev.v4l2_dev = &cx->v4l2_dev;
 359        s->video_dev.fops = &cx18_v4l2_enc_fops;
 360        s->video_dev.release = video_device_release_empty;
 361        if (cx->card->video_inputs->video_type == CX18_CARD_INPUT_VID_TUNER)
 362                s->video_dev.tvnorms = cx->tuner_std;
 363        else
 364                s->video_dev.tvnorms = V4L2_STD_ALL;
 365        s->video_dev.lock = &cx->serialize_lock;
 366        cx18_set_funcs(&s->video_dev);
 367        return 0;
 368}
 369
 370/* Initialize v4l2 variables and register v4l2 devices */
 371int cx18_streams_setup(struct cx18 *cx)
 372{
 373        int type, ret;
 374
 375        /* Setup V4L2 Devices */
 376        for (type = 0; type < CX18_MAX_STREAMS; type++) {
 377                /* Prepare device */
 378                ret = cx18_prep_dev(cx, type);
 379                if (ret < 0)
 380                        break;
 381
 382                /* Allocate Stream */
 383                ret = cx18_stream_alloc(&cx->streams[type]);
 384                if (ret < 0)
 385                        break;
 386        }
 387        if (type == CX18_MAX_STREAMS)
 388                return 0;
 389
 390        /* One or more streams could not be initialized. Clean 'em all up. */
 391        cx18_streams_cleanup(cx, 0);
 392        return ret;
 393}
 394
 395static int cx18_reg_dev(struct cx18 *cx, int type)
 396{
 397        struct cx18_stream *s = &cx->streams[type];
 398        int vfl_type = cx18_stream_info[type].vfl_type;
 399        const char *name;
 400        int num, ret;
 401
 402        if (type == CX18_ENC_STREAM_TYPE_TS && s->dvb != NULL) {
 403                ret = cx18_dvb_register(s);
 404                if (ret < 0) {
 405                        CX18_ERR("DVB failed to register\n");
 406                        return ret;
 407                }
 408        }
 409
 410        if (s->video_dev.v4l2_dev == NULL)
 411                return 0;
 412
 413        num = s->video_dev.num;
 414        s->video_dev.device_caps = s->v4l2_dev_caps;    /* device capabilities */
 415        /* card number + user defined offset + device offset */
 416        if (type != CX18_ENC_STREAM_TYPE_MPG) {
 417                struct cx18_stream *s_mpg = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
 418
 419                if (s_mpg->video_dev.v4l2_dev)
 420                        num = s_mpg->video_dev.num
 421                            + cx18_stream_info[type].num_offset;
 422        }
 423        video_set_drvdata(&s->video_dev, s);
 424
 425        /* Register device. First try the desired minor, then any free one. */
 426        ret = video_register_device_no_warn(&s->video_dev, vfl_type, num);
 427        if (ret < 0) {
 428                CX18_ERR("Couldn't register v4l2 device for %s (device node number %d)\n",
 429                        s->name, num);
 430                s->video_dev.v4l2_dev = NULL;
 431                return ret;
 432        }
 433
 434        name = video_device_node_name(&s->video_dev);
 435
 436        switch (vfl_type) {
 437        case VFL_TYPE_GRABBER:
 438                CX18_INFO("Registered device %s for %s (%d x %d.%02d kB)\n",
 439                          name, s->name, cx->stream_buffers[type],
 440                          cx->stream_buf_size[type] / 1024,
 441                          (cx->stream_buf_size[type] * 100 / 1024) % 100);
 442                break;
 443
 444        case VFL_TYPE_RADIO:
 445                CX18_INFO("Registered device %s for %s\n", name, s->name);
 446                break;
 447
 448        case VFL_TYPE_VBI:
 449                if (cx->stream_buffers[type])
 450                        CX18_INFO("Registered device %s for %s (%d x %d bytes)\n",
 451                                  name, s->name, cx->stream_buffers[type],
 452                                  cx->stream_buf_size[type]);
 453                else
 454                        CX18_INFO("Registered device %s for %s\n",
 455                                name, s->name);
 456                break;
 457        }
 458
 459        return 0;
 460}
 461
 462/* Register v4l2 devices */
 463int cx18_streams_register(struct cx18 *cx)
 464{
 465        int type;
 466        int err;
 467        int ret = 0;
 468
 469        /* Register V4L2 devices */
 470        for (type = 0; type < CX18_MAX_STREAMS; type++) {
 471                err = cx18_reg_dev(cx, type);
 472                if (err && ret == 0)
 473                        ret = err;
 474        }
 475
 476        if (ret == 0)
 477                return 0;
 478
 479        /* One or more streams could not be initialized. Clean 'em all up. */
 480        cx18_streams_cleanup(cx, 1);
 481        return ret;
 482}
 483
 484/* Unregister v4l2 devices */
 485void cx18_streams_cleanup(struct cx18 *cx, int unregister)
 486{
 487        struct video_device *vdev;
 488        int type;
 489
 490        /* Teardown all streams */
 491        for (type = 0; type < CX18_MAX_STREAMS; type++) {
 492
 493                /* The TS has a cx18_dvb structure, not a video_device */
 494                if (type == CX18_ENC_STREAM_TYPE_TS) {
 495                        if (cx->streams[type].dvb != NULL) {
 496                                if (unregister)
 497                                        cx18_dvb_unregister(&cx->streams[type]);
 498                                kfree(cx->streams[type].dvb);
 499                                cx->streams[type].dvb = NULL;
 500                                cx18_stream_free(&cx->streams[type]);
 501                        }
 502                        continue;
 503                }
 504
 505                /* No struct video_device, but can have buffers allocated */
 506                if (type == CX18_ENC_STREAM_TYPE_IDX) {
 507                        /* If the module params didn't inhibit IDX ... */
 508                        if (cx->stream_buffers[type] != 0) {
 509                                cx->stream_buffers[type] = 0;
 510                                /*
 511                                 * Before calling cx18_stream_free(),
 512                                 * check if the IDX stream was actually set up.
 513                                 * Needed, since the cx18_probe() error path
 514                                 * exits through here as well as normal clean up
 515                                 */
 516                                if (cx->streams[type].buffers != 0)
 517                                        cx18_stream_free(&cx->streams[type]);
 518                        }
 519                        continue;
 520                }
 521
 522                /* If struct video_device exists, can have buffers allocated */
 523                vdev = &cx->streams[type].video_dev;
 524
 525                if (vdev->v4l2_dev == NULL)
 526                        continue;
 527
 528                if (type == CX18_ENC_STREAM_TYPE_YUV)
 529                        videobuf_mmap_free(&cx->streams[type].vbuf_q);
 530
 531                cx18_stream_free(&cx->streams[type]);
 532
 533                video_unregister_device(vdev);
 534        }
 535}
 536
 537static void cx18_vbi_setup(struct cx18_stream *s)
 538{
 539        struct cx18 *cx = s->cx;
 540        int raw = cx18_raw_vbi(cx);
 541        u32 data[CX2341X_MBOX_MAX_DATA];
 542        int lines;
 543
 544        if (cx->is_60hz) {
 545                cx->vbi.count = 12;
 546                cx->vbi.start[0] = 10;
 547                cx->vbi.start[1] = 273;
 548        } else {        /* PAL/SECAM */
 549                cx->vbi.count = 18;
 550                cx->vbi.start[0] = 6;
 551                cx->vbi.start[1] = 318;
 552        }
 553
 554        /* setup VBI registers */
 555        if (raw)
 556                v4l2_subdev_call(cx->sd_av, vbi, s_raw_fmt, &cx->vbi.in.fmt.vbi);
 557        else
 558                v4l2_subdev_call(cx->sd_av, vbi, s_sliced_fmt, &cx->vbi.in.fmt.sliced);
 559
 560        /*
 561         * Send the CX18_CPU_SET_RAW_VBI_PARAM API command to setup Encoder Raw
 562         * VBI when the first analog capture channel starts, as once it starts
 563         * (e.g. MPEG), we can't effect any change in the Encoder Raw VBI setup
 564         * (i.e. for the VBI capture channels).  We also send it for each
 565         * analog capture channel anyway just to make sure we get the proper
 566         * behavior
 567         */
 568        if (raw) {
 569                lines = cx->vbi.count * 2;
 570        } else {
 571                /*
 572                 * For 525/60 systems, according to the VIP 2 & BT.656 std:
 573                 * The EAV RP code's Field bit toggles on line 4, a few lines
 574                 * after the Vertcal Blank bit has already toggled.
 575                 * Tell the encoder to capture 21-4+1=18 lines per field,
 576                 * since we want lines 10 through 21.
 577                 *
 578                 * For 625/50 systems, according to the VIP 2 & BT.656 std:
 579                 * The EAV RP code's Field bit toggles on line 1, a few lines
 580                 * after the Vertcal Blank bit has already toggled.
 581                 * (We've actually set the digitizer so that the Field bit
 582                 * toggles on line 2.) Tell the encoder to capture 23-2+1=22
 583                 * lines per field, since we want lines 6 through 23.
 584                 */
 585                lines = cx->is_60hz ? (21 - 4 + 1) * 2 : (23 - 2 + 1) * 2;
 586        }
 587
 588        data[0] = s->handle;
 589        /* Lines per field */
 590        data[1] = (lines / 2) | ((lines / 2) << 16);
 591        /* bytes per line */
 592        data[2] = (raw ? VBI_ACTIVE_SAMPLES
 593                       : (cx->is_60hz ? VBI_HBLANK_SAMPLES_60HZ
 594                                      : VBI_HBLANK_SAMPLES_50HZ));
 595        /* Every X number of frames a VBI interrupt arrives
 596           (frames as in 25 or 30 fps) */
 597        data[3] = 1;
 598        /*
 599         * Set the SAV/EAV RP codes to look for as start/stop points
 600         * when in VIP-1.1 mode
 601         */
 602        if (raw) {
 603                /*
 604                 * Start codes for beginning of "active" line in vertical blank
 605                 * 0x20 (               VerticalBlank                )
 606                 * 0x60 (     EvenField VerticalBlank                )
 607                 */
 608                data[4] = 0x20602060;
 609                /*
 610                 * End codes for end of "active" raw lines and regular lines
 611                 * 0x30 (               VerticalBlank HorizontalBlank)
 612                 * 0x70 (     EvenField VerticalBlank HorizontalBlank)
 613                 * 0x90 (Task                         HorizontalBlank)
 614                 * 0xd0 (Task EvenField               HorizontalBlank)
 615                 */
 616                data[5] = 0x307090d0;
 617        } else {
 618                /*
 619                 * End codes for active video, we want data in the hblank region
 620                 * 0xb0 (Task         0 VerticalBlank HorizontalBlank)
 621                 * 0xf0 (Task EvenField VerticalBlank HorizontalBlank)
 622                 *
 623                 * Since the V bit is only allowed to toggle in the EAV RP code,
 624                 * just before the first active region line, these two
 625                 * are problematic:
 626                 * 0x90 (Task                         HorizontalBlank)
 627                 * 0xd0 (Task EvenField               HorizontalBlank)
 628                 *
 629                 * We have set the digitzer such that we don't have to worry
 630                 * about these problem codes.
 631                 */
 632                data[4] = 0xB0F0B0F0;
 633                /*
 634                 * Start codes for beginning of active line in vertical blank
 635                 * 0xa0 (Task           VerticalBlank                )
 636                 * 0xe0 (Task EvenField VerticalBlank                )
 637                 */
 638                data[5] = 0xA0E0A0E0;
 639        }
 640
 641        CX18_DEBUG_INFO("Setup VBI h: %d lines %x bpl %d fr %d %x %x\n",
 642                        data[0], data[1], data[2], data[3], data[4], data[5]);
 643
 644        cx18_api(cx, CX18_CPU_SET_RAW_VBI_PARAM, 6, data);
 645}
 646
 647void cx18_stream_rotate_idx_mdls(struct cx18 *cx)
 648{
 649        struct cx18_stream *s = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
 650        struct cx18_mdl *mdl;
 651
 652        if (!cx18_stream_enabled(s))
 653                return;
 654
 655        /* Return if the firmware is not running low on MDLs */
 656        if ((atomic_read(&s->q_free.depth) + atomic_read(&s->q_busy.depth)) >=
 657                                            CX18_ENC_STREAM_TYPE_IDX_FW_MDL_MIN)
 658                return;
 659
 660        /* Return if there are no MDLs to rotate back to the firmware */
 661        if (atomic_read(&s->q_full.depth) < 2)
 662                return;
 663
 664        /*
 665         * Take the oldest IDX MDL still holding data, and discard its index
 666         * entries by scheduling the MDL to go back to the firmware
 667         */
 668        mdl = cx18_dequeue(s, &s->q_full);
 669        if (mdl != NULL)
 670                cx18_enqueue(s, mdl, &s->q_free);
 671}
 672
 673static
 674struct cx18_queue *_cx18_stream_put_mdl_fw(struct cx18_stream *s,
 675                                           struct cx18_mdl *mdl)
 676{
 677        struct cx18 *cx = s->cx;
 678        struct cx18_queue *q;
 679
 680        /* Don't give it to the firmware, if we're not running a capture */
 681        if (s->handle == CX18_INVALID_TASK_HANDLE ||
 682            test_bit(CX18_F_S_STOPPING, &s->s_flags) ||
 683            !test_bit(CX18_F_S_STREAMING, &s->s_flags))
 684                return cx18_enqueue(s, mdl, &s->q_free);
 685
 686        q = cx18_enqueue(s, mdl, &s->q_busy);
 687        if (q != &s->q_busy)
 688                return q; /* The firmware has the max MDLs it can handle */
 689
 690        cx18_mdl_sync_for_device(s, mdl);
 691        cx18_vapi(cx, CX18_CPU_DE_SET_MDL, 5, s->handle,
 692                  (void __iomem *) &cx->scb->cpu_mdl[mdl->id] - cx->enc_mem,
 693                  s->bufs_per_mdl, mdl->id, s->mdl_size);
 694        return q;
 695}
 696
 697static
 698void _cx18_stream_load_fw_queue(struct cx18_stream *s)
 699{
 700        struct cx18_queue *q;
 701        struct cx18_mdl *mdl;
 702
 703        if (atomic_read(&s->q_free.depth) == 0 ||
 704            atomic_read(&s->q_busy.depth) >= CX18_MAX_FW_MDLS_PER_STREAM)
 705                return;
 706
 707        /* Move from q_free to q_busy notifying the firmware, until the limit */
 708        do {
 709                mdl = cx18_dequeue(s, &s->q_free);
 710                if (mdl == NULL)
 711                        break;
 712                q = _cx18_stream_put_mdl_fw(s, mdl);
 713        } while (atomic_read(&s->q_busy.depth) < CX18_MAX_FW_MDLS_PER_STREAM
 714                 && q == &s->q_busy);
 715}
 716
 717void cx18_out_work_handler(struct work_struct *work)
 718{
 719        struct cx18_stream *s =
 720                         container_of(work, struct cx18_stream, out_work_order);
 721
 722        _cx18_stream_load_fw_queue(s);
 723}
 724
 725static void cx18_stream_configure_mdls(struct cx18_stream *s)
 726{
 727        cx18_unload_queues(s);
 728
 729        switch (s->type) {
 730        case CX18_ENC_STREAM_TYPE_YUV:
 731                /*
 732                 * Height should be a multiple of 32 lines.
 733                 * Set the MDL size to the exact size needed for one frame.
 734                 * Use enough buffers per MDL to cover the MDL size
 735                 */
 736                if (s->pixelformat == V4L2_PIX_FMT_HM12)
 737                        s->mdl_size = 720 * s->cx->cxhdl.height * 3 / 2;
 738                else
 739                        s->mdl_size = 720 * s->cx->cxhdl.height * 2;
 740                s->bufs_per_mdl = s->mdl_size / s->buf_size;
 741                if (s->mdl_size % s->buf_size)
 742                        s->bufs_per_mdl++;
 743                break;
 744        case CX18_ENC_STREAM_TYPE_VBI:
 745                s->bufs_per_mdl = 1;
 746                if  (cx18_raw_vbi(s->cx)) {
 747                        s->mdl_size = (s->cx->is_60hz ? 12 : 18)
 748                                                       * 2 * VBI_ACTIVE_SAMPLES;
 749                } else {
 750                        /*
 751                         * See comment in cx18_vbi_setup() below about the
 752                         * extra lines we capture in sliced VBI mode due to
 753                         * the lines on which EAV RP codes toggle.
 754                        */
 755                        s->mdl_size = s->cx->is_60hz
 756                                   ? (21 - 4 + 1) * 2 * VBI_HBLANK_SAMPLES_60HZ
 757                                   : (23 - 2 + 1) * 2 * VBI_HBLANK_SAMPLES_50HZ;
 758                }
 759                break;
 760        default:
 761                s->bufs_per_mdl = 1;
 762                s->mdl_size = s->buf_size * s->bufs_per_mdl;
 763                break;
 764        }
 765
 766        cx18_load_queues(s);
 767}
 768
 769int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
 770{
 771        u32 data[MAX_MB_ARGUMENTS];
 772        struct cx18 *cx = s->cx;
 773        int captype = 0;
 774        struct cx18_stream *s_idx;
 775
 776        if (!cx18_stream_enabled(s))
 777                return -EINVAL;
 778
 779        CX18_DEBUG_INFO("Start encoder stream %s\n", s->name);
 780
 781        switch (s->type) {
 782        case CX18_ENC_STREAM_TYPE_MPG:
 783                captype = CAPTURE_CHANNEL_TYPE_MPEG;
 784                cx->mpg_data_received = cx->vbi_data_inserted = 0;
 785                cx->dualwatch_jiffies = jiffies;
 786                cx->dualwatch_stereo_mode = v4l2_ctrl_g_ctrl(cx->cxhdl.audio_mode);
 787                cx->search_pack_header = 0;
 788                break;
 789
 790        case CX18_ENC_STREAM_TYPE_IDX:
 791                captype = CAPTURE_CHANNEL_TYPE_INDEX;
 792                break;
 793        case CX18_ENC_STREAM_TYPE_TS:
 794                captype = CAPTURE_CHANNEL_TYPE_TS;
 795                break;
 796        case CX18_ENC_STREAM_TYPE_YUV:
 797                captype = CAPTURE_CHANNEL_TYPE_YUV;
 798                break;
 799        case CX18_ENC_STREAM_TYPE_PCM:
 800                captype = CAPTURE_CHANNEL_TYPE_PCM;
 801                break;
 802        case CX18_ENC_STREAM_TYPE_VBI:
 803#ifdef CX18_ENCODER_PARSES_SLICED
 804                captype = cx18_raw_vbi(cx) ?
 805                     CAPTURE_CHANNEL_TYPE_VBI : CAPTURE_CHANNEL_TYPE_SLICED_VBI;
 806#else
 807                /*
 808                 * Currently we set things up so that Sliced VBI from the
 809                 * digitizer is handled as Raw VBI by the encoder
 810                 */
 811                captype = CAPTURE_CHANNEL_TYPE_VBI;
 812#endif
 813                cx->vbi.frame = 0;
 814                cx->vbi.inserted_frame = 0;
 815                memset(cx->vbi.sliced_mpeg_size,
 816                        0, sizeof(cx->vbi.sliced_mpeg_size));
 817                break;
 818        default:
 819                return -EINVAL;
 820        }
 821
 822        /* Clear Streamoff flags in case left from last capture */
 823        clear_bit(CX18_F_S_STREAMOFF, &s->s_flags);
 824
 825        cx18_vapi_result(cx, data, CX18_CREATE_TASK, 1, CPU_CMD_MASK_CAPTURE);
 826        s->handle = data[0];
 827        cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
 828
 829        /*
 830         * For everything but CAPTURE_CHANNEL_TYPE_TS, play it safe and
 831         * set up all the parameters, as it is not obvious which parameters the
 832         * firmware shares across capture channel types and which it does not.
 833         *
 834         * Some of the cx18_vapi() calls below apply to only certain capture
 835         * channel types.  We're hoping there's no harm in calling most of them
 836         * anyway, as long as the values are all consistent.  Setting some
 837         * shared parameters will have no effect once an analog capture channel
 838         * has started streaming.
 839         */
 840        if (captype != CAPTURE_CHANNEL_TYPE_TS) {
 841                cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
 842                cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
 843                cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 8, 0);
 844                cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 4, 1);
 845
 846                /*
 847                 * Audio related reset according to
 848                 * Documentation/media/v4l-drivers/cx2341x.rst
 849                 */
 850                if (atomic_read(&cx->ana_capturing) == 0)
 851                        cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 2,
 852                                  s->handle, 12);
 853
 854                /*
 855                 * Number of lines for Field 1 & Field 2 according to
 856                 * Documentation/media/v4l-drivers/cx2341x.rst
 857                 * Field 1 is 312 for 625 line systems in BT.656
 858                 * Field 2 is 313 for 625 line systems in BT.656
 859                 */
 860                cx18_vapi(cx, CX18_CPU_SET_CAPTURE_LINE_NO, 3,
 861                          s->handle, 312, 313);
 862
 863                if (cx->v4l2_cap & V4L2_CAP_VBI_CAPTURE)
 864                        cx18_vbi_setup(s);
 865
 866                /*
 867                 * Select to receive I, P, and B frame index entries, if the
 868                 * index stream is enabled.  Otherwise disable index entry
 869                 * generation.
 870                 */
 871                s_idx = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
 872                cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 2,
 873                                 s->handle, cx18_stream_enabled(s_idx) ? 7 : 0);
 874
 875                /* Call out to the common CX2341x API setup for user controls */
 876                cx->cxhdl.priv = s;
 877                cx2341x_handler_setup(&cx->cxhdl);
 878
 879                /*
 880                 * When starting a capture and we're set for radio,
 881                 * ensure the video is muted, despite the user control.
 882                 */
 883                if (!cx->cxhdl.video_mute &&
 884                    test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
 885                        cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle,
 886                          (v4l2_ctrl_g_ctrl(cx->cxhdl.video_mute_yuv) << 8) | 1);
 887
 888                /* Enable the Video Format Converter for UYVY 4:2:2 support,
 889                 * rather than the default HM12 Macroblovk 4:2:0 support.
 890                 */
 891                if (captype == CAPTURE_CHANNEL_TYPE_YUV) {
 892                        if (s->pixelformat == V4L2_PIX_FMT_UYVY)
 893                                cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2,
 894                                        s->handle, 1);
 895                        else
 896                                /* If in doubt, default to HM12 */
 897                                cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2,
 898                                        s->handle, 0);
 899                }
 900        }
 901
 902        if (atomic_read(&cx->tot_capturing) == 0) {
 903                cx2341x_handler_set_busy(&cx->cxhdl, 1);
 904                clear_bit(CX18_F_I_EOS, &cx->i_flags);
 905                cx18_write_reg(cx, 7, CX18_DSP0_INTERRUPT_MASK);
 906        }
 907
 908        cx18_vapi(cx, CX18_CPU_DE_SET_MDL_ACK, 3, s->handle,
 909                (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][0] - cx->enc_mem,
 910                (void __iomem *)&cx->scb->cpu_mdl_ack[s->type][1] - cx->enc_mem);
 911
 912        /* Init all the cpu_mdls for this stream */
 913        cx18_stream_configure_mdls(s);
 914        _cx18_stream_load_fw_queue(s);
 915
 916        /* begin_capture */
 917        if (cx18_vapi(cx, CX18_CPU_CAPTURE_START, 1, s->handle)) {
 918                CX18_DEBUG_WARN("Error starting capture!\n");
 919                /* Ensure we're really not capturing before releasing MDLs */
 920                set_bit(CX18_F_S_STOPPING, &s->s_flags);
 921                if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 922                        cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, 1);
 923                else
 924                        cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 925                clear_bit(CX18_F_S_STREAMING, &s->s_flags);
 926                /* FIXME - CX18_F_S_STREAMOFF as well? */
 927                cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 928                cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 929                s->handle = CX18_INVALID_TASK_HANDLE;
 930                clear_bit(CX18_F_S_STOPPING, &s->s_flags);
 931                if (atomic_read(&cx->tot_capturing) == 0) {
 932                        set_bit(CX18_F_I_EOS, &cx->i_flags);
 933                        cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
 934                }
 935                return -EINVAL;
 936        }
 937
 938        /* you're live! sit back and await interrupts :) */
 939        if (captype != CAPTURE_CHANNEL_TYPE_TS)
 940                atomic_inc(&cx->ana_capturing);
 941        atomic_inc(&cx->tot_capturing);
 942        return 0;
 943}
 944EXPORT_SYMBOL(cx18_start_v4l2_encode_stream);
 945
 946void cx18_stop_all_captures(struct cx18 *cx)
 947{
 948        int i;
 949
 950        for (i = CX18_MAX_STREAMS - 1; i >= 0; i--) {
 951                struct cx18_stream *s = &cx->streams[i];
 952
 953                if (!cx18_stream_enabled(s))
 954                        continue;
 955                if (test_bit(CX18_F_S_STREAMING, &s->s_flags))
 956                        cx18_stop_v4l2_encode_stream(s, 0);
 957        }
 958}
 959
 960int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end)
 961{
 962        struct cx18 *cx = s->cx;
 963
 964        if (!cx18_stream_enabled(s))
 965                return -EINVAL;
 966
 967        /* This function assumes that you are allowed to stop the capture
 968           and that we are actually capturing */
 969
 970        CX18_DEBUG_INFO("Stop Capture\n");
 971
 972        if (atomic_read(&cx->tot_capturing) == 0)
 973                return 0;
 974
 975        set_bit(CX18_F_S_STOPPING, &s->s_flags);
 976        if (s->type == CX18_ENC_STREAM_TYPE_MPG)
 977                cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 2, s->handle, !gop_end);
 978        else
 979                cx18_vapi(cx, CX18_CPU_CAPTURE_STOP, 1, s->handle);
 980
 981        if (s->type == CX18_ENC_STREAM_TYPE_MPG && gop_end) {
 982                CX18_INFO("ignoring gop_end: not (yet?) supported by the firmware\n");
 983        }
 984
 985        if (s->type != CX18_ENC_STREAM_TYPE_TS)
 986                atomic_dec(&cx->ana_capturing);
 987        atomic_dec(&cx->tot_capturing);
 988
 989        /* Clear capture and no-read bits */
 990        clear_bit(CX18_F_S_STREAMING, &s->s_flags);
 991
 992        /* Tell the CX23418 it can't use our buffers anymore */
 993        cx18_vapi(cx, CX18_CPU_DE_RELEASE_MDL, 1, s->handle);
 994
 995        cx18_vapi(cx, CX18_DESTROY_TASK, 1, s->handle);
 996        s->handle = CX18_INVALID_TASK_HANDLE;
 997        clear_bit(CX18_F_S_STOPPING, &s->s_flags);
 998
 999        if (atomic_read(&cx->tot_capturing) > 0)
1000                return 0;
1001
1002        cx2341x_handler_set_busy(&cx->cxhdl, 0);
1003        cx18_write_reg(cx, 5, CX18_DSP0_INTERRUPT_MASK);
1004        wake_up(&s->waitq);
1005
1006        return 0;
1007}
1008EXPORT_SYMBOL(cx18_stop_v4l2_encode_stream);
1009
1010u32 cx18_find_handle(struct cx18 *cx)
1011{
1012        int i;
1013
1014        /* find first available handle to be used for global settings */
1015        for (i = 0; i < CX18_MAX_STREAMS; i++) {
1016                struct cx18_stream *s = &cx->streams[i];
1017
1018                if (s->video_dev.v4l2_dev && (s->handle != CX18_INVALID_TASK_HANDLE))
1019                        return s->handle;
1020        }
1021        return CX18_INVALID_TASK_HANDLE;
1022}
1023
1024struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle)
1025{
1026        int i;
1027        struct cx18_stream *s;
1028
1029        if (handle == CX18_INVALID_TASK_HANDLE)
1030                return NULL;
1031
1032        for (i = 0; i < CX18_MAX_STREAMS; i++) {
1033                s = &cx->streams[i];
1034                if (s->handle != handle)
1035                        continue;
1036                if (cx18_stream_enabled(s))
1037                        return s;
1038        }
1039        return NULL;
1040}
1041