sound/usb/pcm.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  */
   4
   5 #include <linux/init.h>
   6 #include <linux/slab.h>
   7 #include <linux/bitrev.h>
   8 #include <linux/ratelimit.h>
   9 #include <linux/usb.h>
  10 #include <linux/usb/audio.h>
  11 #include <linux/usb/audio-v2.h>
  12
  13 #include <sound/core.h>
  14 #include <sound/pcm.h>
  15 #include <sound/pcm_params.h>
  16
  17 #include "usbaudio.h"
  18 #include "card.h"
  19 #include "quirks.h"
  20 #include "endpoint.h"
  21 #include "helper.h"
  22 #include "pcm.h"
  23 #include "clock.h"
  24 #include "power.h"
  25 #include "media.h"
  26 #include "implicit.h"
  27
  28 #define SUBSTREAM_FLAG_DATA_EP_STARTED  0
  29 #define SUBSTREAM_FLAG_SYNC_EP_STARTED  1
  30
  31 /* return the estimated delay based on USB frame counters */
  32 static snd_pcm_uframes_t snd_usb_pcm_delay(struct snd_usb_substream *subs,
  33                                            struct snd_pcm_runtime *runtime)
  34 {
  35         unsigned int current_frame_number;
  36         unsigned int frame_diff;
  37         int est_delay;
  38         int queued;
  39
  40         if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
  41                 queued = bytes_to_frames(runtime, subs->inflight_bytes);
  42                 if (!queued)
  43                         return 0;
  44         } else if (!subs->running) {
  45                 return 0;
  46         }
  47
  48         current_frame_number = usb_get_current_frame_number(subs->dev);
  49         /*
  50          * HCD implementations use different widths, use lower 8 bits.
  51          * The delay will be managed up to 256ms, which is more than
  52          * enough
  53          */
  54         frame_diff = (current_frame_number - subs->last_frame_number) & 0xff;
  55
  56         /* Approximation based on number of samples per USB frame (ms),
  57            some truncation for 44.1 but the estimate is good enough */
  58         est_delay = frame_diff * runtime->rate / 1000;
  59
  60         if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
  61                 est_delay = queued - est_delay;
  62                 if (est_delay < 0)
  63                         est_delay = 0;
  64         }
  65
  66         return est_delay;
  67 }
  68
  69 /*
  70  * return the current pcm pointer.  just based on the hwptr_done value.
  71  */
  72 static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
  73 {
  74         struct snd_pcm_runtime *runtime = substream->runtime;
  75         struct snd_usb_substream *subs = runtime->private_data;
  76         unsigned int hwptr_done;
  77
  78         if (atomic_read(&subs->stream->chip->shutdown))
  79                 return SNDRV_PCM_POS_XRUN;
  80         spin_lock(&subs->lock);
  81         hwptr_done = subs->hwptr_done;
  82         runtime->delay = snd_usb_pcm_delay(subs, runtime);
  83         spin_unlock(&subs->lock);
  84         return bytes_to_frames(runtime, hwptr_done);
  85 }
  86
  87 /*
  88  * find a matching audio format
  89  */
  90 static const struct audioformat *
  91 find_format(struct list_head *fmt_list_head, snd_pcm_format_t format,
  92             unsigned int rate, unsigned int channels, bool strict_match,
  93             struct snd_usb_substream *subs)
  94 {
  95         const struct audioformat *fp;
  96         const struct audioformat *found = NULL;
  97         int cur_attr = 0, attr;
  98
  99         list_for_each_entry(fp, fmt_list_head, list) {
 100                 if (strict_match) {
 101                         if (!(fp->formats & pcm_format_to_bits(format)))
 102                                 continue;
 103                         if (fp->channels != channels)
 104                                 continue;
 105                 }
 106                 if (rate < fp->rate_min || rate > fp->rate_max)
 107                         continue;
 108                 if (!(fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
 109                         unsigned int i;
 110                         for (i = 0; i < fp->nr_rates; i++)
 111                                 if (fp->rate_table[i] == rate)
 112                                         break;
 113                         if (i >= fp->nr_rates)
 114                                 continue;
 115                 }
 116                 attr = fp->ep_attr & USB_ENDPOINT_SYNCTYPE;
 117                 if (!found) {
 118                         found = fp;
 119                         cur_attr = attr;
 120                         continue;
 121                 }
 122                 /* avoid async out and adaptive in if the other method
 123                  * supports the same format.
 124                  * this is a workaround for the case like
 125                  * M-audio audiophile USB.
 126                  */
 127                 if (subs && attr != cur_attr) {
 128                         if ((attr == USB_ENDPOINT_SYNC_ASYNC &&
 129                              subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
 130                             (attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
 131                              subs->direction == SNDRV_PCM_STREAM_CAPTURE))
 132                                 continue;
 133                         if ((cur_attr == USB_ENDPOINT_SYNC_ASYNC &&
 134                              subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
 135                             (cur_attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
 136                              subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
 137                                 found = fp;
 138                                 cur_attr = attr;
 139                                 continue;
 140                         }
 141                 }
 142                 /* find the format with the largest max. packet size */
 143                 if (fp->maxpacksize > found->maxpacksize) {
 144                         found = fp;
 145                         cur_attr = attr;
 146                 }
 147         }
 148         return found;
 149 }
 150
 151 static const struct audioformat *
 152 find_substream_format(struct snd_usb_substream *subs,
 153                       const struct snd_pcm_hw_params *params)
 154 {
 155         return find_format(&subs->fmt_list, params_format(params),
 156                            params_rate(params), params_channels(params),
 157                            true, subs);
 158 }
 159
 160 static int init_pitch_v1(struct snd_usb_audio *chip, int ep)
 161 {
 162         struct usb_device *dev = chip->dev;
 163         unsigned char data[1];
 164         int err;
 165
 166         data[0] = 1;
 167         err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
 168                               USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
 169                               UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep,
 170                               data, sizeof(data));
 171         return err;
 172 }
 173
 174 static int init_pitch_v2(struct snd_usb_audio *chip, int ep)
 175 {
 176         struct usb_device *dev = chip->dev;
 177         unsigned char data[1];
 178         int err;
 179
 180         data[0] = 1;
 181         err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR,
 182                               USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 183                               UAC2_EP_CS_PITCH << 8, 0,
 184                               data, sizeof(data));
 185         return err;
 186 }
 187
 188 /*
 189  * initialize the pitch control and sample rate
 190  */
 191 int snd_usb_init_pitch(struct snd_usb_audio *chip,
 192                        const struct audioformat *fmt)
 193 {
 194         int err;
 195
 196         /* if endpoint doesn't have pitch control, bail out */
 197         if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL))
 198                 return 0;
 199
 200         usb_audio_dbg(chip, "enable PITCH for EP 0x%x\n", fmt->endpoint);
 201
 202         switch (fmt->protocol) {
 203         case UAC_VERSION_1:
 204                 err = init_pitch_v1(chip, fmt->endpoint);
 205                 break;
 206         case UAC_VERSION_2:
 207                 err = init_pitch_v2(chip, fmt->endpoint);
 208                 break;
 209         default:
 210                 return 0;
 211         }
 212
 213         if (err < 0) {
 214                 usb_audio_err(chip, "failed to enable PITCH for EP 0x%x\n",
 215                               fmt->endpoint);
 216                 return err;
 217         }
 218
 219         return 0;
 220 }
 221
 222 static bool stop_endpoints(struct snd_usb_substream *subs, bool keep_pending)
 223 {
 224         bool stopped = 0;
 225
 226         if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) {
 227                 snd_usb_endpoint_stop(subs->sync_endpoint, keep_pending);
 228                 stopped = true;
 229         }
 230         if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) {
 231                 snd_usb_endpoint_stop(subs->data_endpoint, keep_pending);
 232                 stopped = true;
 233         }
 234         return stopped;
 235 }
 236
 237 static int start_endpoints(struct snd_usb_substream *subs)
 238 {
 239         int err;
 240
 241         if (!subs->data_endpoint)
 242                 return -EINVAL;
 243
 244         if (!test_and_set_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) {
 245                 err = snd_usb_endpoint_start(subs->data_endpoint);
 246                 if (err < 0) {
 247                         clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags);
 248                         goto error;
 249                 }
 250         }
 251
 252         if (subs->sync_endpoint &&
 253             !test_and_set_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) {
 254                 err = snd_usb_endpoint_start(subs->sync_endpoint);
 255                 if (err < 0) {
 256                         clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags);
 257                         goto error;
 258                 }
 259         }
 260
 261         return 0;
 262
 263  error:
 264         stop_endpoints(subs, false);
 265         return err;
 266 }
 267
 268 static void sync_pending_stops(struct snd_usb_substream *subs)
 269 {
 270         snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
 271         snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
 272 }
 273
 274 /* PCM sync_stop callback */
 275 static int snd_usb_pcm_sync_stop(struct snd_pcm_substream *substream)
 276 {
 277         struct snd_usb_substream *subs = substream->runtime->private_data;
 278
 279         sync_pending_stops(subs);
 280         return 0;
 281 }
 282
 283 /* Set up sync endpoint */
 284 int snd_usb_audioformat_set_sync_ep(struct snd_usb_audio *chip,
 285                                     struct audioformat *fmt)
 286 {
 287         struct usb_device *dev = chip->dev;
 288         struct usb_host_interface *alts;
 289         struct usb_interface_descriptor *altsd;
 290         unsigned int ep, attr, sync_attr;
 291         bool is_playback;
 292         int err;
 293
 294         alts = snd_usb_get_host_interface(chip, fmt->iface, fmt->altsetting);
 295         if (!alts)
 296                 return 0;
 297         altsd = get_iface_desc(alts);
 298
 299         err = snd_usb_parse_implicit_fb_quirk(chip, fmt, alts);
 300         if (err > 0)
 301                 return 0; /* matched */
 302
 303         /*
 304          * Generic sync EP handling
 305          */
 306
 307         if (altsd->bNumEndpoints < 2)
 308                 return 0;
 309
 310         is_playback = !(get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN);
 311         attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
 312         if ((is_playback && (attr == USB_ENDPOINT_SYNC_SYNC ||
 313                              attr == USB_ENDPOINT_SYNC_ADAPTIVE)) ||
 314             (!is_playback && attr != USB_ENDPOINT_SYNC_ADAPTIVE))
 315                 return 0;
 316
 317         sync_attr = get_endpoint(alts, 1)->bmAttributes;
 318
 319         /*
 320          * In case of illegal SYNC_NONE for OUT endpoint, we keep going to see
 321          * if we don't find a sync endpoint, as on M-Audio Transit. In case of
 322          * error fall back to SYNC mode and don't create sync endpoint
 323          */
 324
 325         /* check sync-pipe endpoint */
 326         /* ... and check descriptor size before accessing bSynchAddress
 327            because there is a version of the SB Audigy 2 NX firmware lacking
 328            the audio fields in the endpoint descriptors */
 329         if ((sync_attr & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_ISOC ||
 330             (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
 331              get_endpoint(alts, 1)->bSynchAddress != 0)) {
 332                 dev_err(&dev->dev,
 333                         "%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x\n",
 334                            fmt->iface, fmt->altsetting,
 335                            get_endpoint(alts, 1)->bmAttributes,
 336                            get_endpoint(alts, 1)->bLength,
 337                            get_endpoint(alts, 1)->bSynchAddress);
 338                 if (is_playback && attr == USB_ENDPOINT_SYNC_NONE)
 339                         return 0;
 340                 return -EINVAL;
 341         }
 342         ep = get_endpoint(alts, 1)->bEndpointAddress;
 343         if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
 344             get_endpoint(alts, 0)->bSynchAddress != 0 &&
 345             ((is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
 346              (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
 347                 dev_err(&dev->dev,
 348                         "%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x\n",
 349                            fmt->iface, fmt->altsetting,
 350                            is_playback, ep, get_endpoint(alts, 0)->bSynchAddress);
 351                 if (is_playback && attr == USB_ENDPOINT_SYNC_NONE)
 352                         return 0;
 353                 return -EINVAL;
 354         }
 355
 356         fmt->sync_ep = ep;
 357         fmt->sync_iface = altsd->bInterfaceNumber;
 358         fmt->sync_altsetting = altsd->bAlternateSetting;
 359         fmt->sync_ep_idx = 1;
 360         if ((sync_attr & USB_ENDPOINT_USAGE_MASK) == USB_ENDPOINT_USAGE_IMPLICIT_FB)
 361                 fmt->implicit_fb = 1;
 362
 363         dev_dbg(&dev->dev, "%d:%d: found sync_ep=0x%x, iface=%d, alt=%d, implicit_fb=%d\n",
 364                 fmt->iface, fmt->altsetting, fmt->sync_ep, fmt->sync_iface,
 365                 fmt->sync_altsetting, fmt->implicit_fb);
 366
 367         return 0;
 368 }
 369
 370 static int snd_usb_pcm_change_state(struct snd_usb_substream *subs, int state)
 371 {
 372         int ret;
 373
 374         if (!subs->str_pd)
 375                 return 0;
 376
 377         ret = snd_usb_power_domain_set(subs->stream->chip, subs->str_pd, state);
 378         if (ret < 0) {
 379                 dev_err(&subs->dev->dev,
 380                         "Cannot change Power Domain ID: %d to state: %d. Err: %d\n",
 381                         subs->str_pd->pd_id, state, ret);
 382                 return ret;
 383         }
 384
 385         return 0;
 386 }
 387
 388 int snd_usb_pcm_suspend(struct snd_usb_stream *as)
 389 {
 390         int ret;
 391
 392         ret = snd_usb_pcm_change_state(&as->substream[0], UAC3_PD_STATE_D2);
 393         if (ret < 0)
 394                 return ret;
 395
 396         ret = snd_usb_pcm_change_state(&as->substream[1], UAC3_PD_STATE_D2);
 397         if (ret < 0)
 398                 return ret;
 399
 400         return 0;
 401 }
 402
 403 int snd_usb_pcm_resume(struct snd_usb_stream *as)
 404 {
 405         int ret;
 406
 407         ret = snd_usb_pcm_change_state(&as->substream[0], UAC3_PD_STATE_D1);
 408         if (ret < 0)
 409                 return ret;
 410
 411         ret = snd_usb_pcm_change_state(&as->substream[1], UAC3_PD_STATE_D1);
 412         if (ret < 0)
 413                 return ret;
 414
 415         return 0;
 416 }
 417
 418 static void close_endpoints(struct snd_usb_audio *chip,
 419                             struct snd_usb_substream *subs)
 420 {
 421         if (subs->data_endpoint) {
 422                 snd_usb_endpoint_set_sync(chip, subs->data_endpoint, NULL);
 423                 snd_usb_endpoint_close(chip, subs->data_endpoint);
 424                 subs->data_endpoint = NULL;
 425         }
 426
 427         if (subs->sync_endpoint) {
 428                 snd_usb_endpoint_close(chip, subs->sync_endpoint);
 429                 subs->sync_endpoint = NULL;
 430         }
 431 }
 432
 433 static int configure_endpoints(struct snd_usb_audio *chip,
 434                                struct snd_usb_substream *subs)
 435 {
 436         int err;
 437
 438         if (subs->data_endpoint->need_setup) {
 439                 /* stop any running stream beforehand */
 440                 if (stop_endpoints(subs, false))
 441                         sync_pending_stops(subs);
 442                 err = snd_usb_endpoint_configure(chip, subs->data_endpoint);
 443                 if (err < 0)
 444                         return err;
 445                 snd_usb_set_format_quirk(subs, subs->cur_audiofmt);
 446         }
 447
 448         if (subs->sync_endpoint) {
 449                 err = snd_usb_endpoint_configure(chip, subs->sync_endpoint);
 450                 if (err < 0)
 451                         return err;
 452         }
 453
 454         return 0;
 455 }
 456
 457 /*
 458  * hw_params callback
 459  *
 460  * allocate a buffer and set the given audio format.
 461  *
 462  * so far we use a physically linear buffer although packetize transfer
 463  * doesn't need a continuous area.
 464  * if sg buffer is supported on the later version of alsa, we'll follow
 465  * that.
 466  */
 467 static int snd_usb_hw_params(struct snd_pcm_substream *substream,
 468                              struct snd_pcm_hw_params *hw_params)
 469 {
 470         struct snd_usb_substream *subs = substream->runtime->private_data;
 471         struct snd_usb_audio *chip = subs->stream->chip;
 472         const struct audioformat *fmt;
 473         const struct audioformat *sync_fmt;
 474         int ret;
 475
 476         ret = snd_media_start_pipeline(subs);
 477         if (ret)
 478                 return ret;
 479
 480         fmt = find_substream_format(subs, hw_params);
 481         if (!fmt) {
 482                 usb_audio_dbg(chip,
 483                               "cannot find format: format=%s, rate=%d, channels=%d\n",
 484                               snd_pcm_format_name(params_format(hw_params)),
 485                               params_rate(hw_params), params_channels(hw_params));
 486                 ret = -EINVAL;
 487                 goto stop_pipeline;
 488         }
 489
 490         if (fmt->implicit_fb) {
 491                 sync_fmt = snd_usb_find_implicit_fb_sync_format(chip, fmt,
 492                                                                 hw_params,
 493                                                                 !substream->stream);
 494                 if (!sync_fmt) {
 495                         usb_audio_dbg(chip,
 496                                       "cannot find sync format: ep=0x%x, iface=%d:%d, format=%s, rate=%d, channels=%d\n",
 497                                       fmt->sync_ep, fmt->sync_iface,
 498                                       fmt->sync_altsetting,
 499                                       snd_pcm_format_name(params_format(hw_params)),
 500                                       params_rate(hw_params), params_channels(hw_params));
 501                         ret = -EINVAL;
 502                         goto stop_pipeline;
 503                 }
 504         } else {
 505                 sync_fmt = fmt;
 506         }
 507
 508         ret = snd_usb_lock_shutdown(chip);
 509         if (ret < 0)
 510                 goto stop_pipeline;
 511
 512         ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D0);
 513         if (ret < 0)
 514                 goto unlock;
 515
 516         if (subs->data_endpoint) {
 517                 if (snd_usb_endpoint_compatible(chip, subs->data_endpoint,
 518                                                 fmt, hw_params))
 519                         goto unlock;
 520                 close_endpoints(chip, subs);
 521         }
 522
 523         subs->data_endpoint = snd_usb_endpoint_open(chip, fmt, hw_params, false);
 524         if (!subs->data_endpoint) {
 525                 ret = -EINVAL;
 526                 goto unlock;
 527         }
 528
 529         if (fmt->sync_ep) {
 530                 subs->sync_endpoint = snd_usb_endpoint_open(chip, sync_fmt,
 531                                                             hw_params,
 532                                                             fmt == sync_fmt);
 533                 if (!subs->sync_endpoint) {
 534                         ret = -EINVAL;
 535                         goto unlock;
 536                 }
 537
 538                 snd_usb_endpoint_set_sync(chip, subs->data_endpoint,
 539                                           subs->sync_endpoint);
 540         }
 541
 542         mutex_lock(&chip->mutex);
 543         subs->cur_audiofmt = fmt;
 544         mutex_unlock(&chip->mutex);
 545
 546         ret = configure_endpoints(chip, subs);
 547
 548  unlock:
 549         if (ret < 0)
 550                 close_endpoints(chip, subs);
 551
 552         snd_usb_unlock_shutdown(chip);
 553  stop_pipeline:
 554         if (ret < 0)
 555                 snd_media_stop_pipeline(subs);
 556
 557         return ret;
 558 }
 559
 560 /*
 561  * hw_free callback
 562  *
 563  * reset the audio format and release the buffer
 564  */
 565 static int snd_usb_hw_free(struct snd_pcm_substream *substream)
 566 {
 567         struct snd_usb_substream *subs = substream->runtime->private_data;
 568         struct snd_usb_audio *chip = subs->stream->chip;
 569
 570         snd_media_stop_pipeline(subs);
 571         mutex_lock(&chip->mutex);
 572         subs->cur_audiofmt = NULL;
 573         mutex_unlock(&chip->mutex);
 574         if (!snd_usb_lock_shutdown(chip)) {
 575                 if (stop_endpoints(subs, false))
 576                         sync_pending_stops(subs);
 577                 close_endpoints(chip, subs);
 578                 snd_usb_unlock_shutdown(chip);
 579         }
 580
 581         return 0;
 582 }
 583
 584 /* free-wheeling mode? (e.g. dmix) */
 585 static int in_free_wheeling_mode(struct snd_pcm_runtime *runtime)
 586 {
 587         return runtime->stop_threshold > runtime->buffer_size;
 588 }
 589
 590 /* check whether early start is needed for playback stream */
 591 static int lowlatency_playback_available(struct snd_pcm_runtime *runtime,
 592                                          struct snd_usb_substream *subs)
 593 {
 594         struct snd_usb_audio *chip = subs->stream->chip;
 595
 596         if (subs->direction == SNDRV_PCM_STREAM_CAPTURE)
 597                 return false;
 598         /* disabled via module option? */
 599         if (!chip->lowlatency)
 600                 return false;
 601         if (in_free_wheeling_mode(runtime))
 602                 return false;
 603         /* implicit feedback mode has own operation mode */
 604         if (snd_usb_endpoint_implicit_feedback_sink(subs->data_endpoint))
 605                 return false;
 606         return true;
 607 }
 608
 609 /*
 610  * prepare callback
 611  *
 612  * only a few subtle things...
 613  */
 614 static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
 615 {
 616         struct snd_pcm_runtime *runtime = substream->runtime;
 617         struct snd_usb_substream *subs = runtime->private_data;
 618         struct snd_usb_audio *chip = subs->stream->chip;
 619         int ret;
 620
 621         ret = snd_usb_lock_shutdown(chip);
 622         if (ret < 0)
 623                 return ret;
 624         if (snd_BUG_ON(!subs->data_endpoint)) {
 625                 ret = -EIO;
 626                 goto unlock;
 627         }
 628
 629         ret = configure_endpoints(chip, subs);
 630         if (ret < 0)
 631                 goto unlock;
 632
 633         /* reset the pointer */
 634         subs->buffer_bytes = frames_to_bytes(runtime, runtime->buffer_size);
 635         subs->inflight_bytes = 0;
 636         subs->hwptr_done = 0;
 637         subs->transfer_done = 0;
 638         subs->last_frame_number = 0;
 639         subs->period_elapsed_pending = 0;
 640         runtime->delay = 0;
 641
 642         subs->lowlatency_playback = lowlatency_playback_available(runtime, subs);
 643         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 644             !subs->lowlatency_playback)
 645                 ret = start_endpoints(subs);
 646
 647  unlock:
 648         snd_usb_unlock_shutdown(chip);
 649         return ret;
 650 }
 651
 652 /*
 653  * h/w constraints
 654  */
 655
 656 #ifdef HW_CONST_DEBUG
 657 #define hwc_debug(fmt, args...) pr_debug(fmt, ##args)
 658 #else
 659 #define hwc_debug(fmt, args...) do { } while(0)
 660 #endif
 661
 662 #define MAX_BUFFER_BYTES        (4 * 1024 * 1024)
 663 #define MAX_PERIOD_BYTES        (512 * 1024)
 664
 665 static const struct snd_pcm_hardware snd_usb_hardware =
 666 {
 667         .info =                 SNDRV_PCM_INFO_MMAP |
 668                                 SNDRV_PCM_INFO_MMAP_VALID |
 669                                 SNDRV_PCM_INFO_BATCH |
 670                                 SNDRV_PCM_INFO_INTERLEAVED |
 671                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
 672                                 SNDRV_PCM_INFO_PAUSE,
 673         .channels_min =         1,
 674         .channels_max =         256,
 675         .buffer_bytes_max =     MAX_BUFFER_BYTES,
 676         .period_bytes_min =     64,
 677         .period_bytes_max =     MAX_PERIOD_BYTES,
 678         .periods_min =          2,
 679         .periods_max =          1024,
 680 };
 681
 682 static int hw_check_valid_format(struct snd_usb_substream *subs,
 683                                  struct snd_pcm_hw_params *params,
 684                                  const struct audioformat *fp)
 685 {
 686         struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 687         struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 688         struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 689         struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
 690         struct snd_mask check_fmts;
 691         unsigned int ptime;
 692
 693         /* check the format */
 694         snd_mask_none(&check_fmts);
 695         check_fmts.bits[0] = (u32)fp->formats;
 696         check_fmts.bits[1] = (u32)(fp->formats >> 32);
 697         snd_mask_intersect(&check_fmts, fmts);
 698         if (snd_mask_empty(&check_fmts)) {
 699                 hwc_debug("   > check: no supported format 0x%llx\n", fp->formats);
 700                 return 0;
 701         }
 702         /* check the channels */
 703         if (fp->channels < ct->min || fp->channels > ct->max) {
 704                 hwc_debug("   > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
 705                 return 0;
 706         }
 707         /* check the rate is within the range */
 708         if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
 709                 hwc_debug("   > check: rate_min %d > max %d\n", fp->rate_min, it->max);
 710                 return 0;
 711         }
 712         if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
 713                 hwc_debug("   > check: rate_max %d < min %d\n", fp->rate_max, it->min);
 714                 return 0;
 715         }
 716         /* check whether the period time is >= the data packet interval */
 717         if (subs->speed != USB_SPEED_FULL) {
 718                 ptime = 125 * (1 << fp->datainterval);
 719                 if (ptime > pt->max || (ptime == pt->max && pt->openmax)) {
 720                         hwc_debug("   > check: ptime %u > max %u\n", ptime, pt->max);
 721                         return 0;
 722                 }
 723         }
 724         return 1;
 725 }
 726
 727 static int apply_hw_params_minmax(struct snd_interval *it, unsigned int rmin,
 728                                   unsigned int rmax)
 729 {
 730         int changed;
 731
 732         if (rmin > rmax) {
 733                 hwc_debug("  --> get empty\n");
 734                 it->empty = 1;
 735                 return -EINVAL;
 736         }
 737
 738         changed = 0;
 739         if (it->min < rmin) {
 740                 it->min = rmin;
 741                 it->openmin = 0;
 742                 changed = 1;
 743         }
 744         if (it->max > rmax) {
 745                 it->max = rmax;
 746                 it->openmax = 0;
 747                 changed = 1;
 748         }
 749         if (snd_interval_checkempty(it)) {
 750                 it->empty = 1;
 751                 return -EINVAL;
 752         }
 753         hwc_debug("  --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
 754         return changed;
 755 }
 756
 757 static int hw_rule_rate(struct snd_pcm_hw_params *params,
 758                         struct snd_pcm_hw_rule *rule)
 759 {
 760         struct snd_usb_substream *subs = rule->private;
 761         struct snd_usb_audio *chip = subs->stream->chip;
 762         const struct audioformat *fp;
 763         struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 764         unsigned int rmin, rmax, r;
 765         int i;
 766
 767         hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
 768         rmin = UINT_MAX;
 769         rmax = 0;
 770         list_for_each_entry(fp, &subs->fmt_list, list) {
 771                 if (!hw_check_valid_format(subs, params, fp))
 772                         continue;
 773                 r = snd_usb_endpoint_get_clock_rate(chip, fp->clock);
 774                 if (r > 0) {
 775                         if (!snd_interval_test(it, r))
 776                                 continue;
 777                         rmin = min(rmin, r);
 778                         rmax = max(rmax, r);
 779                         continue;
 780                 }
 781                 if (fp->rate_table && fp->nr_rates) {
 782                         for (i = 0; i < fp->nr_rates; i++) {
 783                                 r = fp->rate_table[i];
 784                                 if (!snd_interval_test(it, r))
 785                                         continue;
 786                                 rmin = min(rmin, r);
 787                                 rmax = max(rmax, r);
 788                         }
 789                 } else {
 790                         rmin = min(rmin, fp->rate_min);
 791                         rmax = max(rmax, fp->rate_max);
 792                 }
 793         }
 794
 795         return apply_hw_params_minmax(it, rmin, rmax);
 796 }
 797
 798
 799 static int hw_rule_channels(struct snd_pcm_hw_params *params,
 800                             struct snd_pcm_hw_rule *rule)
 801 {
 802         struct snd_usb_substream *subs = rule->private;
 803         const struct audioformat *fp;
 804         struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 805         unsigned int rmin, rmax;
 806
 807         hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
 808         rmin = UINT_MAX;
 809         rmax = 0;
 810         list_for_each_entry(fp, &subs->fmt_list, list) {
 811                 if (!hw_check_valid_format(subs, params, fp))
 812                         continue;
 813                 rmin = min(rmin, fp->channels);
 814                 rmax = max(rmax, fp->channels);
 815         }
 816
 817         return apply_hw_params_minmax(it, rmin, rmax);
 818 }
 819
 820 static int apply_hw_params_format_bits(struct snd_mask *fmt, u64 fbits)
 821 {
 822         u32 oldbits[2];
 823         int changed;
 824
 825         oldbits[0] = fmt->bits[0];
 826         oldbits[1] = fmt->bits[1];
 827         fmt->bits[0] &= (u32)fbits;
 828         fmt->bits[1] &= (u32)(fbits >> 32);
 829         if (!fmt->bits[0] && !fmt->bits[1]) {
 830                 hwc_debug("  --> get empty\n");
 831                 return -EINVAL;
 832         }
 833         changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
 834         hwc_debug("  --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
 835         return changed;
 836 }
 837
 838 static int hw_rule_format(struct snd_pcm_hw_params *params,
 839                           struct snd_pcm_hw_rule *rule)
 840 {
 841         struct snd_usb_substream *subs = rule->private;
 842         const struct audioformat *fp;
 843         struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 844         u64 fbits;
 845
 846         hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
 847         fbits = 0;
 848         list_for_each_entry(fp, &subs->fmt_list, list) {
 849                 if (!hw_check_valid_format(subs, params, fp))
 850                         continue;
 851                 fbits |= fp->formats;
 852         }
 853         return apply_hw_params_format_bits(fmt, fbits);
 854 }
 855
 856 static int hw_rule_period_time(struct snd_pcm_hw_params *params,
 857                                struct snd_pcm_hw_rule *rule)
 858 {
 859         struct snd_usb_substream *subs = rule->private;
 860         const struct audioformat *fp;
 861         struct snd_interval *it;
 862         unsigned char min_datainterval;
 863         unsigned int pmin;
 864
 865         it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
 866         hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max);
 867         min_datainterval = 0xff;
 868         list_for_each_entry(fp, &subs->fmt_list, list) {
 869                 if (!hw_check_valid_format(subs, params, fp))
 870                         continue;
 871                 min_datainterval = min(min_datainterval, fp->datainterval);
 872         }
 873         if (min_datainterval == 0xff) {
 874                 hwc_debug("  --> get empty\n");
 875                 it->empty = 1;
 876                 return -EINVAL;
 877         }
 878         pmin = 125 * (1 << min_datainterval);
 879
 880         return apply_hw_params_minmax(it, pmin, UINT_MAX);
 881 }
 882
 883 /* get the EP or the sync EP for implicit fb when it's already set up */
 884 static const struct snd_usb_endpoint *
 885 get_sync_ep_from_substream(struct snd_usb_substream *subs)
 886 {
 887         struct snd_usb_audio *chip = subs->stream->chip;
 888         const struct audioformat *fp;
 889         const struct snd_usb_endpoint *ep;
 890
 891         list_for_each_entry(fp, &subs->fmt_list, list) {
 892                 ep = snd_usb_get_endpoint(chip, fp->endpoint);
 893                 if (ep && ep->cur_audiofmt) {
 894                         /* if EP is already opened solely for this substream,
 895                          * we still allow us to change the parameter; otherwise
 896                          * this substream has to follow the existing parameter
 897                          */
 898                         if (ep->cur_audiofmt != subs->cur_audiofmt || ep->opened > 1)
 899                                 return ep;
 900                 }
 901                 if (!fp->implicit_fb)
 902                         continue;
 903                 /* for the implicit fb, check the sync ep as well */
 904                 ep = snd_usb_get_endpoint(chip, fp->sync_ep);
 905                 if (ep && ep->cur_audiofmt)
 906                         return ep;
 907         }
 908         return NULL;
 909 }
 910
 911 /* additional hw constraints for implicit feedback mode */
 912 static int hw_rule_format_implicit_fb(struct snd_pcm_hw_params *params,
 913                                       struct snd_pcm_hw_rule *rule)
 914 {
 915         struct snd_usb_substream *subs = rule->private;
 916         const struct snd_usb_endpoint *ep;
 917         struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 918
 919         ep = get_sync_ep_from_substream(subs);
 920         if (!ep)
 921                 return 0;
 922
 923         hwc_debug("applying %s\n", __func__);
 924         return apply_hw_params_format_bits(fmt, pcm_format_to_bits(ep->cur_format));
 925 }
 926
 927 static int hw_rule_rate_implicit_fb(struct snd_pcm_hw_params *params,
 928                                     struct snd_pcm_hw_rule *rule)
 929 {
 930         struct snd_usb_substream *subs = rule->private;
 931         const struct snd_usb_endpoint *ep;
 932         struct snd_interval *it;
 933
 934         ep = get_sync_ep_from_substream(subs);
 935         if (!ep)
 936                 return 0;
 937
 938         hwc_debug("applying %s\n", __func__);
 939         it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 940         return apply_hw_params_minmax(it, ep->cur_rate, ep->cur_rate);
 941 }
 942
 943 static int hw_rule_period_size_implicit_fb(struct snd_pcm_hw_params *params,
 944                                            struct snd_pcm_hw_rule *rule)
 945 {
 946         struct snd_usb_substream *subs = rule->private;
 947         const struct snd_usb_endpoint *ep;
 948         struct snd_interval *it;
 949
 950         ep = get_sync_ep_from_substream(subs);
 951         if (!ep)
 952                 return 0;
 953
 954         hwc_debug("applying %s\n", __func__);
 955         it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
 956         return apply_hw_params_minmax(it, ep->cur_period_frames,
 957                                       ep->cur_period_frames);
 958 }
 959
 960 static int hw_rule_periods_implicit_fb(struct snd_pcm_hw_params *params,
 961                                        struct snd_pcm_hw_rule *rule)
 962 {
 963         struct snd_usb_substream *subs = rule->private;
 964         const struct snd_usb_endpoint *ep;
 965         struct snd_interval *it;
 966
 967         ep = get_sync_ep_from_substream(subs);
 968         if (!ep)
 969                 return 0;
 970
 971         hwc_debug("applying %s\n", __func__);
 972         it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIODS);
 973         return apply_hw_params_minmax(it, ep->cur_buffer_periods,
 974                                       ep->cur_buffer_periods);
 975 }
 976
 977 /* get the adjusted max buffer (or period) bytes that can fit with the
 978  * paired format for implicit fb
 979  */
 980 static unsigned int
 981 get_adjusted_max_bytes(struct snd_usb_substream *subs,
 982                        struct snd_usb_substream *pair,
 983                        struct snd_pcm_hw_params *params,
 984                        unsigned int max_bytes,
 985                        bool reverse_map)
 986 {
 987         const struct audioformat *fp, *pp;
 988         unsigned int rmax = 0, r;
 989
 990         list_for_each_entry(fp, &subs->fmt_list, list) {
 991                 if (!fp->implicit_fb)
 992                         continue;
 993                 if (!reverse_map &&
 994                     !hw_check_valid_format(subs, params, fp))
 995                         continue;
 996                 list_for_each_entry(pp, &pair->fmt_list, list) {
 997                         if (pp->iface != fp->sync_iface ||
 998                             pp->altsetting != fp->sync_altsetting ||
 999                             pp->ep_idx != fp->sync_ep_idx)
1000                                 continue;
1001                         if (reverse_map &&
1002                             !hw_check_valid_format(pair, params, pp))
1003                                 break;
1004                         if (!reverse_map && pp->channels > fp->channels)
1005                                 r = max_bytes * fp->channels / pp->channels;
1006                         else if (reverse_map && pp->channels < fp->channels)
1007                                 r = max_bytes * pp->channels / fp->channels;
1008                         else
1009                                 r = max_bytes;
1010                         rmax = max(rmax, r);
1011                         break;
1012                 }
1013         }
1014         return rmax;
1015 }
1016
1017 /* Reduce the period or buffer bytes depending on the paired substream;
1018  * when a paired configuration for implicit fb has a higher number of channels,
1019  * we need to reduce the max size accordingly, otherwise it may become unusable
1020  */
1021 static int hw_rule_bytes_implicit_fb(struct snd_pcm_hw_params *params,
1022                                      struct snd_pcm_hw_rule *rule)
1023 {
1024         struct snd_usb_substream *subs = rule->private;
1025         struct snd_usb_substream *pair;
1026         struct snd_interval *it;
1027         unsigned int max_bytes;
1028         unsigned int rmax;
1029
1030         pair = &subs->stream->substream[!subs->direction];
1031         if (!pair->ep_num)
1032                 return 0;
1033
1034         if (rule->var == SNDRV_PCM_HW_PARAM_PERIOD_BYTES)
1035                 max_bytes = MAX_PERIOD_BYTES;
1036         else
1037                 max_bytes = MAX_BUFFER_BYTES;
1038
1039         rmax = get_adjusted_max_bytes(subs, pair, params, max_bytes, false);
1040         if (!rmax)
1041                 rmax = get_adjusted_max_bytes(pair, subs, params, max_bytes, true);
1042         if (!rmax)
1043                 return 0;
1044
1045         it = hw_param_interval(params, rule->var);
1046         return apply_hw_params_minmax(it, 0, rmax);
1047 }
1048
1049 /*
1050  * set up the runtime hardware information.
1051  */
1052
1053 static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
1054 {
1055         const struct audioformat *fp;
1056         unsigned int pt, ptmin;
1057         int param_period_time_if_needed = -1;
1058         int err;
1059
1060         runtime->hw.formats = subs->formats;
1061
1062         runtime->hw.rate_min = 0x7fffffff;
1063         runtime->hw.rate_max = 0;
1064         runtime->hw.channels_min = 256;
1065         runtime->hw.channels_max = 0;
1066         runtime->hw.rates = 0;
1067         ptmin = UINT_MAX;
1068         /* check min/max rates and channels */
1069         list_for_each_entry(fp, &subs->fmt_list, list) {
1070                 runtime->hw.rates |= fp->rates;
1071                 if (runtime->hw.rate_min > fp->rate_min)
1072                         runtime->hw.rate_min = fp->rate_min;
1073                 if (runtime->hw.rate_max < fp->rate_max)
1074                         runtime->hw.rate_max = fp->rate_max;
1075                 if (runtime->hw.channels_min > fp->channels)
1076                         runtime->hw.channels_min = fp->channels;
1077                 if (runtime->hw.channels_max < fp->channels)
1078                         runtime->hw.channels_max = fp->channels;
1079                 if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) {
1080                         /* FIXME: there might be more than one audio formats... */
1081                         runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1082                                 fp->frame_size;
1083                 }
1084                 pt = 125 * (1 << fp->datainterval);
1085                 ptmin = min(ptmin, pt);
1086         }
1087
1088         param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME;
1089         if (subs->speed == USB_SPEED_FULL)
1090                 /* full speed devices have fixed data packet interval */
1091                 ptmin = 1000;
1092         if (ptmin == 1000)
1093                 /* if period time doesn't go below 1 ms, no rules needed */
1094                 param_period_time_if_needed = -1;
1095
1096         err = snd_pcm_hw_constraint_minmax(runtime,
1097                                            SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1098                                            ptmin, UINT_MAX);
1099         if (err < 0)
1100                 return err;
1101
1102         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1103                                   hw_rule_rate, subs,
1104                                   SNDRV_PCM_HW_PARAM_RATE,
1105                                   SNDRV_PCM_HW_PARAM_FORMAT,
1106                                   SNDRV_PCM_HW_PARAM_CHANNELS,
1107                                   param_period_time_if_needed,
1108                                   -1);
1109         if (err < 0)
1110                 return err;
1111
1112         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1113                                   hw_rule_channels, subs,
1114                                   SNDRV_PCM_HW_PARAM_CHANNELS,
1115                                   SNDRV_PCM_HW_PARAM_FORMAT,
1116                                   SNDRV_PCM_HW_PARAM_RATE,
1117                                   param_period_time_if_needed,
1118                                   -1);
1119         if (err < 0)
1120                 return err;
1121         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1122                                   hw_rule_format, subs,
1123                                   SNDRV_PCM_HW_PARAM_FORMAT,
1124                                   SNDRV_PCM_HW_PARAM_RATE,
1125                                   SNDRV_PCM_HW_PARAM_CHANNELS,
1126                                   param_period_time_if_needed,
1127                                   -1);
1128         if (err < 0)
1129                 return err;
1130         if (param_period_time_if_needed >= 0) {
1131                 err = snd_pcm_hw_rule_add(runtime, 0,
1132                                           SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1133                                           hw_rule_period_time, subs,
1134                                           SNDRV_PCM_HW_PARAM_FORMAT,
1135                                           SNDRV_PCM_HW_PARAM_CHANNELS,
1136                                           SNDRV_PCM_HW_PARAM_RATE,
1137                                           -1);
1138                 if (err < 0)
1139                         return err;
1140         }
1141
1142         /* additional hw constraints for implicit fb */
1143         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1144                                   hw_rule_format_implicit_fb, subs,
1145                                   SNDRV_PCM_HW_PARAM_FORMAT, -1);
1146         if (err < 0)
1147                 return err;
1148         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1149                                   hw_rule_rate_implicit_fb, subs,
1150                                   SNDRV_PCM_HW_PARAM_RATE, -1);
1151         if (err < 0)
1152                 return err;
1153         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1154                                   hw_rule_period_size_implicit_fb, subs,
1155                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1156         if (err < 0)
1157                 return err;
1158         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1159                                   hw_rule_periods_implicit_fb, subs,
1160                                   SNDRV_PCM_HW_PARAM_PERIODS, -1);
1161         if (err < 0)
1162                 return err;
1163         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1164                                   hw_rule_bytes_implicit_fb, subs,
1165                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1166         if (err < 0)
1167                 return err;
1168         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1169                                   hw_rule_bytes_implicit_fb, subs,
1170                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, -1);
1171         if (err < 0)
1172                 return err;
1173
1174         list_for_each_entry(fp, &subs->fmt_list, list) {
1175                 if (fp->implicit_fb) {
1176                         runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1177                         break;
1178                 }
1179         }
1180
1181         return 0;
1182 }
1183
1184 static int snd_usb_pcm_open(struct snd_pcm_substream *substream)
1185 {
1186         int direction = substream->stream;
1187         struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1188         struct snd_pcm_runtime *runtime = substream->runtime;
1189         struct snd_usb_substream *subs = &as->substream[direction];
1190         int ret;
1191
1192         runtime->hw = snd_usb_hardware;
1193         /* need an explicit sync to catch applptr update in low-latency mode */
1194         if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
1195             as->chip->lowlatency)
1196                 runtime->hw.info |= SNDRV_PCM_INFO_SYNC_APPLPTR;
1197         runtime->private_data = subs;
1198         subs->pcm_substream = substream;
1199         /* runtime PM is also done there */
1200
1201         /* initialize DSD/DOP context */
1202         subs->dsd_dop.byte_idx = 0;
1203         subs->dsd_dop.channel = 0;
1204         subs->dsd_dop.marker = 1;
1205
1206         ret = setup_hw_info(runtime, subs);
1207         if (ret < 0)
1208                 return ret;
1209         ret = snd_usb_autoresume(subs->stream->chip);
1210         if (ret < 0)
1211                 return ret;
1212         ret = snd_media_stream_init(subs, as->pcm, direction);
1213         if (ret < 0)
1214                 snd_usb_autosuspend(subs->stream->chip);
1215         return ret;
1216 }
1217
1218 static int snd_usb_pcm_close(struct snd_pcm_substream *substream)
1219 {
1220         int direction = substream->stream;
1221         struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1222         struct snd_usb_substream *subs = &as->substream[direction];
1223         int ret;
1224
1225         snd_media_stop_pipeline(subs);
1226
1227         if (!snd_usb_lock_shutdown(subs->stream->chip)) {
1228                 ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D1);
1229                 snd_usb_unlock_shutdown(subs->stream->chip);
1230                 if (ret < 0)
1231                         return ret;
1232         }
1233
1234         subs->pcm_substream = NULL;
1235         snd_usb_autosuspend(subs->stream->chip);
1236
1237         return 0;
1238 }
1239
1240 /* Since a URB can handle only a single linear buffer, we must use double
1241  * buffering when the data to be transferred overflows the buffer boundary.
1242  * To avoid inconsistencies when updating hwptr_done, we use double buffering
1243  * for all URBs.
1244  */
1245 static void retire_capture_urb(struct snd_usb_substream *subs,
1246                                struct urb *urb)
1247 {
1248         struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1249         unsigned int stride, frames, bytes, oldptr;
1250         int i, period_elapsed = 0;
1251         unsigned long flags;
1252         unsigned char *cp;
1253         int current_frame_number;
1254
1255         /* read frame number here, update pointer in critical section */
1256         current_frame_number = usb_get_current_frame_number(subs->dev);
1257
1258         stride = runtime->frame_bits >> 3;
1259
1260         for (i = 0; i < urb->number_of_packets; i++) {
1261                 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset + subs->pkt_offset_adj;
1262                 if (urb->iso_frame_desc[i].status && printk_ratelimit()) {
1263                         dev_dbg(&subs->dev->dev, "frame %d active: %d\n",
1264                                 i, urb->iso_frame_desc[i].status);
1265                         // continue;
1266                 }
1267                 bytes = urb->iso_frame_desc[i].actual_length;
1268                 if (subs->stream_offset_adj > 0) {
1269                         unsigned int adj = min(subs->stream_offset_adj, bytes);
1270                         cp += adj;
1271                         bytes -= adj;
1272                         subs->stream_offset_adj -= adj;
1273                 }
1274                 frames = bytes / stride;
1275                 if (!subs->txfr_quirk)
1276                         bytes = frames * stride;
1277                 if (bytes % (runtime->sample_bits >> 3) != 0) {
1278                         int oldbytes = bytes;
1279                         bytes = frames * stride;
1280                         dev_warn_ratelimited(&subs->dev->dev,
1281                                  "Corrected urb data len. %d->%d\n",
1282                                                         oldbytes, bytes);
1283                 }
1284                 /* update the current pointer */
1285                 spin_lock_irqsave(&subs->lock, flags);
1286                 oldptr = subs->hwptr_done;
1287                 subs->hwptr_done += bytes;
1288                 if (subs->hwptr_done >= subs->buffer_bytes)
1289                         subs->hwptr_done -= subs->buffer_bytes;
1290                 frames = (bytes + (oldptr % stride)) / stride;
1291                 subs->transfer_done += frames;
1292                 if (subs->transfer_done >= runtime->period_size) {
1293                         subs->transfer_done -= runtime->period_size;
1294                         period_elapsed = 1;
1295                 }
1296
1297                 /* realign last_frame_number */
1298                 subs->last_frame_number = current_frame_number;
1299
1300                 spin_unlock_irqrestore(&subs->lock, flags);
1301                 /* copy a data chunk */
1302                 if (oldptr + bytes > subs->buffer_bytes) {
1303                         unsigned int bytes1 = subs->buffer_bytes - oldptr;
1304
1305                         memcpy(runtime->dma_area + oldptr, cp, bytes1);
1306                         memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1);
1307                 } else {
1308                         memcpy(runtime->dma_area + oldptr, cp, bytes);
1309                 }
1310         }
1311
1312         if (period_elapsed)
1313                 snd_pcm_period_elapsed(subs->pcm_substream);
1314 }
1315
1316 static void urb_ctx_queue_advance(struct snd_usb_substream *subs,
1317                                   struct urb *urb, unsigned int bytes)
1318 {
1319         struct snd_urb_ctx *ctx = urb->context;
1320
1321         ctx->queued += bytes;
1322         subs->inflight_bytes += bytes;
1323         subs->hwptr_done += bytes;
1324         if (subs->hwptr_done >= subs->buffer_bytes)
1325                 subs->hwptr_done -= subs->buffer_bytes;
1326 }
1327
1328 static inline void fill_playback_urb_dsd_dop(struct snd_usb_substream *subs,
1329                                              struct urb *urb, unsigned int bytes)
1330 {
1331         struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1332         unsigned int dst_idx = 0;
1333         unsigned int src_idx = subs->hwptr_done;
1334         unsigned int wrap = subs->buffer_bytes;
1335         u8 *dst = urb->transfer_buffer;
1336         u8 *src = runtime->dma_area;
1337         u8 marker[] = { 0x05, 0xfa };
1338         unsigned int queued = 0;
1339
1340         /*
1341          * The DSP DOP format defines a way to transport DSD samples over
1342          * normal PCM data endpoints. It requires stuffing of marker bytes
1343          * (0x05 and 0xfa, alternating per sample frame), and then expects
1344          * 2 additional bytes of actual payload. The whole frame is stored
1345          * LSB.
1346          *
1347          * Hence, for a stereo transport, the buffer layout looks like this,
1348          * where L refers to left channel samples and R to right.
1349          *
1350          *   L1 L2 0x05   R1 R2 0x05   L3 L4 0xfa  R3 R4 0xfa
1351          *   L5 L6 0x05   R5 R6 0x05   L7 L8 0xfa  R7 R8 0xfa
1352          *   .....
1353          *
1354          */
1355
1356         while (bytes--) {
1357                 if (++subs->dsd_dop.byte_idx == 3) {
1358                         /* frame boundary? */
1359                         dst[dst_idx++] = marker[subs->dsd_dop.marker];
1360                         src_idx += 2;
1361                         subs->dsd_dop.byte_idx = 0;
1362
1363                         if (++subs->dsd_dop.channel % runtime->channels == 0) {
1364                                 /* alternate the marker */
1365                                 subs->dsd_dop.marker++;
1366                                 subs->dsd_dop.marker %= ARRAY_SIZE(marker);
1367                                 subs->dsd_dop.channel = 0;
1368                         }
1369                 } else {
1370                         /* stuff the DSD payload */
1371                         int idx = (src_idx + subs->dsd_dop.byte_idx - 1) % wrap;
1372
1373                         if (subs->cur_audiofmt->dsd_bitrev)
1374                                 dst[dst_idx++] = bitrev8(src[idx]);
1375                         else
1376                                 dst[dst_idx++] = src[idx];
1377                         queued++;
1378                 }
1379         }
1380
1381         urb_ctx_queue_advance(subs, urb, queued);
1382 }
1383
1384 /* copy bit-reversed bytes onto transfer buffer */
1385 static void fill_playback_urb_dsd_bitrev(struct snd_usb_substream *subs,
1386                                          struct urb *urb, unsigned int bytes)
1387 {
1388         struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1389         const u8 *src = runtime->dma_area;
1390         u8 *buf = urb->transfer_buffer;
1391         int i, ofs = subs->hwptr_done;
1392
1393         for (i = 0; i < bytes; i++) {
1394                 *buf++ = bitrev8(src[ofs]);
1395                 if (++ofs >= subs->buffer_bytes)
1396                         ofs = 0;
1397         }
1398
1399         urb_ctx_queue_advance(subs, urb, bytes);
1400 }
1401
1402 static void copy_to_urb(struct snd_usb_substream *subs, struct urb *urb,
1403                         int offset, int stride, unsigned int bytes)
1404 {
1405         struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1406
1407         if (subs->hwptr_done + bytes > subs->buffer_bytes) {
1408                 /* err, the transferred area goes over buffer boundary. */
1409                 unsigned int bytes1 = subs->buffer_bytes - subs->hwptr_done;
1410
1411                 memcpy(urb->transfer_buffer + offset,
1412                        runtime->dma_area + subs->hwptr_done, bytes1);
1413                 memcpy(urb->transfer_buffer + offset + bytes1,
1414                        runtime->dma_area, bytes - bytes1);
1415         } else {
1416                 memcpy(urb->transfer_buffer + offset,
1417                        runtime->dma_area + subs->hwptr_done, bytes);
1418         }
1419
1420         urb_ctx_queue_advance(subs, urb, bytes);
1421 }
1422
1423 static unsigned int copy_to_urb_quirk(struct snd_usb_substream *subs,
1424                                       struct urb *urb, int stride,
1425                                       unsigned int bytes)
1426 {
1427         __le32 packet_length;
1428         int i;
1429
1430         /* Put __le32 length descriptor at start of each packet. */
1431         for (i = 0; i < urb->number_of_packets; i++) {
1432                 unsigned int length = urb->iso_frame_desc[i].length;
1433                 unsigned int offset = urb->iso_frame_desc[i].offset;
1434
1435                 packet_length = cpu_to_le32(length);
1436                 offset += i * sizeof(packet_length);
1437                 urb->iso_frame_desc[i].offset = offset;
1438                 urb->iso_frame_desc[i].length += sizeof(packet_length);
1439                 memcpy(urb->transfer_buffer + offset,
1440                        &packet_length, sizeof(packet_length));
1441                 copy_to_urb(subs, urb, offset + sizeof(packet_length),
1442                             stride, length);
1443         }
1444         /* Adjust transfer size accordingly. */
1445         bytes += urb->number_of_packets * sizeof(packet_length);
1446         return bytes;
1447 }
1448
1449 static int prepare_playback_urb(struct snd_usb_substream *subs,
1450                                 struct urb *urb,
1451                                 bool in_stream_lock)
1452 {
1453         struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1454         struct snd_usb_endpoint *ep = subs->data_endpoint;
1455         struct snd_urb_ctx *ctx = urb->context;
1456         unsigned int frames, bytes;
1457         int counts;
1458         unsigned int transfer_done, frame_limit, avail = 0;
1459         int i, stride, period_elapsed = 0;
1460         unsigned long flags;
1461         int err = 0;
1462
1463         stride = ep->stride;
1464
1465         frames = 0;
1466         ctx->queued = 0;
1467         urb->number_of_packets = 0;
1468
1469         spin_lock_irqsave(&subs->lock, flags);
1470         frame_limit = subs->frame_limit + ep->max_urb_frames;
1471         transfer_done = subs->transfer_done;
1472
1473         if (subs->lowlatency_playback &&
1474             runtime->status->state != SNDRV_PCM_STATE_DRAINING) {
1475                 unsigned int hwptr = subs->hwptr_done / stride;
1476
1477                 /* calculate the byte offset-in-buffer of the appl_ptr */
1478                 avail = (runtime->control->appl_ptr - runtime->hw_ptr_base)
1479                         % runtime->buffer_size;
1480                 if (avail <= hwptr)
1481                         avail += runtime->buffer_size;
1482                 avail -= hwptr;
1483         }
1484
1485         for (i = 0; i < ctx->packets; i++) {
1486                 counts = snd_usb_endpoint_next_packet_size(ep, ctx, i, avail);
1487                 if (counts < 0)
1488                         break;
1489                 /* set up descriptor */
1490                 urb->iso_frame_desc[i].offset = frames * stride;
1491                 urb->iso_frame_desc[i].length = counts * stride;
1492                 frames += counts;
1493                 avail -= counts;
1494                 urb->number_of_packets++;
1495                 transfer_done += counts;
1496                 if (transfer_done >= runtime->period_size) {
1497                         transfer_done -= runtime->period_size;
1498                         frame_limit = 0;
1499                         period_elapsed = 1;
1500                         if (subs->fmt_type == UAC_FORMAT_TYPE_II) {
1501                                 if (transfer_done > 0) {
1502                                         /* FIXME: fill-max mode is not
1503                                          * supported yet */
1504                                         frames -= transfer_done;
1505                                         counts -= transfer_done;
1506                                         urb->iso_frame_desc[i].length =
1507                                                 counts * stride;
1508                                         transfer_done = 0;
1509                                 }
1510                                 i++;
1511                                 if (i < ctx->packets) {
1512                                         /* add a transfer delimiter */
1513                                         urb->iso_frame_desc[i].offset =
1514                                                 frames * stride;
1515                                         urb->iso_frame_desc[i].length = 0;
1516                                         urb->number_of_packets++;
1517                                 }
1518                                 break;
1519                         }
1520                 }
1521                 /* finish at the period boundary or after enough frames */
1522                 if ((period_elapsed || transfer_done >= frame_limit) &&
1523                     !snd_usb_endpoint_implicit_feedback_sink(ep))
1524                         break;
1525         }
1526
1527         if (!frames) {
1528                 err = -EAGAIN;
1529                 goto unlock;
1530         }
1531
1532         bytes = frames * stride;
1533         subs->transfer_done = transfer_done;
1534         subs->frame_limit = frame_limit;
1535         if (unlikely(ep->cur_format == SNDRV_PCM_FORMAT_DSD_U16_LE &&
1536                      subs->cur_audiofmt->dsd_dop)) {
1537                 fill_playback_urb_dsd_dop(subs, urb, bytes);
1538         } else if (unlikely(ep->cur_format == SNDRV_PCM_FORMAT_DSD_U8 &&
1539                            subs->cur_audiofmt->dsd_bitrev)) {
1540                 fill_playback_urb_dsd_bitrev(subs, urb, bytes);
1541         } else {
1542                 /* usual PCM */
1543                 if (!subs->tx_length_quirk)
1544                         copy_to_urb(subs, urb, 0, stride, bytes);
1545                 else
1546                         bytes = copy_to_urb_quirk(subs, urb, stride, bytes);
1547                         /* bytes is now amount of outgoing data */
1548         }
1549
1550         subs->last_frame_number = usb_get_current_frame_number(subs->dev);
1551
1552         if (subs->trigger_tstamp_pending_update) {
1553                 /* this is the first actual URB submitted,
1554                  * update trigger timestamp to reflect actual start time
1555                  */
1556                 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1557                 subs->trigger_tstamp_pending_update = false;
1558         }
1559
1560         if (period_elapsed && !subs->running && subs->lowlatency_playback) {
1561                 subs->period_elapsed_pending = 1;
1562                 period_elapsed = 0;
1563         }
1564
1565  unlock:
1566         spin_unlock_irqrestore(&subs->lock, flags);
1567         if (err < 0)
1568                 return err;
1569         urb->transfer_buffer_length = bytes;
1570         if (period_elapsed) {
1571                 if (in_stream_lock)
1572                         snd_pcm_period_elapsed_under_stream_lock(subs->pcm_substream);
1573                 else
1574                         snd_pcm_period_elapsed(subs->pcm_substream);
1575         }
1576         return 0;
1577 }
1578
1579 /*
1580  * process after playback data complete
1581  * - decrease the delay count again
1582  */
1583 static void retire_playback_urb(struct snd_usb_substream *subs,
1584                                struct urb *urb)
1585 {
1586         unsigned long flags;
1587         struct snd_urb_ctx *ctx = urb->context;
1588         bool period_elapsed = false;
1589
1590         spin_lock_irqsave(&subs->lock, flags);
1591         if (ctx->queued) {
1592                 if (subs->inflight_bytes >= ctx->queued)
1593                         subs->inflight_bytes -= ctx->queued;
1594                 else
1595                         subs->inflight_bytes = 0;
1596         }
1597
1598         subs->last_frame_number = usb_get_current_frame_number(subs->dev);
1599         if (subs->running) {
1600                 period_elapsed = subs->period_elapsed_pending;
1601                 subs->period_elapsed_pending = 0;
1602         }
1603         spin_unlock_irqrestore(&subs->lock, flags);
1604         if (period_elapsed)
1605                 snd_pcm_period_elapsed(subs->pcm_substream);
1606 }
1607
1608 /* PCM ack callback for the playback stream;
1609  * this plays a role only when the stream is running in low-latency mode.
1610  */
1611 static int snd_usb_pcm_playback_ack(struct snd_pcm_substream *substream)
1612 {
1613         struct snd_usb_substream *subs = substream->runtime->private_data;
1614         struct snd_usb_endpoint *ep;
1615
1616         if (!subs->lowlatency_playback || !subs->running)
1617                 return 0;
1618         ep = subs->data_endpoint;
1619         if (!ep)
1620                 return 0;
1621         /* When no more in-flight URBs available, try to process the pending
1622          * outputs here
1623          */
1624         if (!ep->active_mask)
1625                 snd_usb_queue_pending_output_urbs(ep, true);
1626         return 0;
1627 }
1628
1629 static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream,
1630                                               int cmd)
1631 {
1632         struct snd_usb_substream *subs = substream->runtime->private_data;
1633         int err;
1634
1635         switch (cmd) {
1636         case SNDRV_PCM_TRIGGER_START:
1637                 subs->trigger_tstamp_pending_update = true;
1638                 fallthrough;
1639         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1640                 snd_usb_endpoint_set_callback(subs->data_endpoint,
1641                                               prepare_playback_urb,
1642                                               retire_playback_urb,
1643                                               subs);
1644                 if (subs->lowlatency_playback &&
1645                     cmd == SNDRV_PCM_TRIGGER_START) {
1646                         if (in_free_wheeling_mode(substream->runtime))
1647                                 subs->lowlatency_playback = false;
1648                         err = start_endpoints(subs);
1649                         if (err < 0) {
1650                                 snd_usb_endpoint_set_callback(subs->data_endpoint,
1651                                                               NULL, NULL, NULL);
1652                                 return err;
1653                         }
1654                 }
1655                 subs->running = 1;
1656                 dev_dbg(&subs->dev->dev, "%d:%d Start Playback PCM\n",
1657                         subs->cur_audiofmt->iface,
1658                         subs->cur_audiofmt->altsetting);
1659                 return 0;
1660         case SNDRV_PCM_TRIGGER_SUSPEND:
1661         case SNDRV_PCM_TRIGGER_STOP:
1662                 stop_endpoints(subs, substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING);
1663                 snd_usb_endpoint_set_callback(subs->data_endpoint,
1664                                               NULL, NULL, NULL);
1665                 subs->running = 0;
1666                 dev_dbg(&subs->dev->dev, "%d:%d Stop Playback PCM\n",
1667                         subs->cur_audiofmt->iface,
1668                         subs->cur_audiofmt->altsetting);
1669                 return 0;
1670         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1671                 /* keep retire_data_urb for delay calculation */
1672                 snd_usb_endpoint_set_callback(subs->data_endpoint,
1673                                               NULL,
1674                                               retire_playback_urb,
1675                                               subs);
1676                 subs->running = 0;
1677                 dev_dbg(&subs->dev->dev, "%d:%d Pause Playback PCM\n",
1678                         subs->cur_audiofmt->iface,
1679                         subs->cur_audiofmt->altsetting);
1680                 return 0;
1681         }
1682
1683         return -EINVAL;
1684 }
1685
1686 static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream,
1687                                              int cmd)
1688 {
1689         int err;
1690         struct snd_usb_substream *subs = substream->runtime->private_data;
1691
1692         switch (cmd) {
1693         case SNDRV_PCM_TRIGGER_START:
1694                 err = start_endpoints(subs);
1695                 if (err < 0)
1696                         return err;
1697                 fallthrough;
1698         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1699                 snd_usb_endpoint_set_callback(subs->data_endpoint,
1700                                               NULL, retire_capture_urb,
1701                                               subs);
1702                 subs->last_frame_number = usb_get_current_frame_number(subs->dev);
1703                 subs->running = 1;
1704                 dev_dbg(&subs->dev->dev, "%d:%d Start Capture PCM\n",
1705                         subs->cur_audiofmt->iface,
1706                         subs->cur_audiofmt->altsetting);
1707                 return 0;
1708         case SNDRV_PCM_TRIGGER_SUSPEND:
1709         case SNDRV_PCM_TRIGGER_STOP:
1710                 stop_endpoints(subs, false);
1711                 fallthrough;
1712         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1713                 snd_usb_endpoint_set_callback(subs->data_endpoint,
1714                                               NULL, NULL, NULL);
1715                 subs->running = 0;
1716                 dev_dbg(&subs->dev->dev, "%d:%d Stop Capture PCM\n",
1717                         subs->cur_audiofmt->iface,
1718                         subs->cur_audiofmt->altsetting);
1719                 return 0;
1720         }
1721
1722         return -EINVAL;
1723 }
1724
1725 static const struct snd_pcm_ops snd_usb_playback_ops = {
1726         .open =         snd_usb_pcm_open,
1727         .close =        snd_usb_pcm_close,
1728         .hw_params =    snd_usb_hw_params,
1729         .hw_free =      snd_usb_hw_free,
1730         .prepare =      snd_usb_pcm_prepare,
1731         .trigger =      snd_usb_substream_playback_trigger,
1732         .sync_stop =    snd_usb_pcm_sync_stop,
1733         .pointer =      snd_usb_pcm_pointer,
1734         .ack =          snd_usb_pcm_playback_ack,
1735 };
1736
1737 static const struct snd_pcm_ops snd_usb_capture_ops = {
1738         .open =         snd_usb_pcm_open,
1739         .close =        snd_usb_pcm_close,
1740         .hw_params =    snd_usb_hw_params,
1741         .hw_free =      snd_usb_hw_free,
1742         .prepare =      snd_usb_pcm_prepare,
1743         .trigger =      snd_usb_substream_capture_trigger,
1744         .sync_stop =    snd_usb_pcm_sync_stop,
1745         .pointer =      snd_usb_pcm_pointer,
1746 };
1747
1748 void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream)
1749 {
1750         const struct snd_pcm_ops *ops;
1751
1752         ops = stream == SNDRV_PCM_STREAM_PLAYBACK ?
1753                         &snd_usb_playback_ops : &snd_usb_capture_ops;
1754         snd_pcm_set_ops(pcm, stream, ops);
1755 }
1756
1757 void snd_usb_preallocate_buffer(struct snd_usb_substream *subs)
1758 {
1759         struct snd_pcm *pcm = subs->stream->pcm;
1760         struct snd_pcm_substream *s = pcm->streams[subs->direction].substream;
1761         struct device *dev = subs->dev->bus->sysdev;
1762
1763         if (snd_usb_use_vmalloc)
1764                 snd_pcm_set_managed_buffer(s, SNDRV_DMA_TYPE_VMALLOC,
1765                                            NULL, 0, 0);
1766         else
1767                 snd_pcm_set_managed_buffer(s, SNDRV_DMA_TYPE_DEV_SG,
1768                                            dev, 64*1024, 512*1024);
1769 }