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 "debug.h"
  21 #include "endpoint.h"
  22 #include "helper.h"
  23 #include "pcm.h"
  24 #include "clock.h"
  25 #include "power.h"
  26 #include "media.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 snd_pcm_uframes_t snd_usb_pcm_delay(struct snd_usb_substream *subs,
  33                                     unsigned int rate)
  34 {
  35         int current_frame_number;
  36         int frame_diff;
  37         int est_delay;
  38
  39         if (!subs->last_delay)
  40                 return 0; /* short path */
  41
  42         current_frame_number = usb_get_current_frame_number(subs->dev);
  43         /*
  44          * HCD implementations use different widths, use lower 8 bits.
  45          * The delay will be managed up to 256ms, which is more than
  46          * enough
  47          */
  48         frame_diff = (current_frame_number - subs->last_frame_number) & 0xff;
  49
  50         /* Approximation based on number of samples per USB frame (ms),
  51            some truncation for 44.1 but the estimate is good enough */
  52         est_delay =  frame_diff * rate / 1000;
  53         if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK)
  54                 est_delay = subs->last_delay - est_delay;
  55         else
  56                 est_delay = subs->last_delay + est_delay;
  57
  58         if (est_delay < 0)
  59                 est_delay = 0;
  60         return est_delay;
  61 }
  62
  63 /*
  64  * return the current pcm pointer.  just based on the hwptr_done value.
  65  */
  66 static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
  67 {
  68         struct snd_usb_substream *subs = substream->runtime->private_data;
  69         unsigned int hwptr_done;
  70
  71         if (atomic_read(&subs->stream->chip->shutdown))
  72                 return SNDRV_PCM_POS_XRUN;
  73         spin_lock(&subs->lock);
  74         hwptr_done = subs->hwptr_done;
  75         substream->runtime->delay = snd_usb_pcm_delay(subs,
  76                                                 substream->runtime->rate);
  77         spin_unlock(&subs->lock);
  78         return hwptr_done / (substream->runtime->frame_bits >> 3);
  79 }
  80
  81 /*
  82  * find a matching audio format
  83  */
  84 static struct audioformat *find_format(struct snd_usb_substream *subs)
  85 {
  86         struct audioformat *fp;
  87         struct audioformat *found = NULL;
  88         int cur_attr = 0, attr;
  89
  90         list_for_each_entry(fp, &subs->fmt_list, list) {
  91                 if (!(fp->formats & pcm_format_to_bits(subs->pcm_format)))
  92                         continue;
  93                 if (fp->channels != subs->channels)
  94                         continue;
  95                 if (subs->cur_rate < fp->rate_min ||
  96                     subs->cur_rate > fp->rate_max)
  97                         continue;
  98                 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
  99                         unsigned int i;
 100                         for (i = 0; i < fp->nr_rates; i++)
 101                                 if (fp->rate_table[i] == subs->cur_rate)
 102                                         break;
 103                         if (i >= fp->nr_rates)
 104                                 continue;
 105                 }
 106                 attr = fp->ep_attr & USB_ENDPOINT_SYNCTYPE;
 107                 if (! found) {
 108                         found = fp;
 109                         cur_attr = attr;
 110                         continue;
 111                 }
 112                 /* avoid async out and adaptive in if the other method
 113                  * supports the same format.
 114                  * this is a workaround for the case like
 115                  * M-audio audiophile USB.
 116                  */
 117                 if (attr != cur_attr) {
 118                         if ((attr == USB_ENDPOINT_SYNC_ASYNC &&
 119                              subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
 120                             (attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
 121                              subs->direction == SNDRV_PCM_STREAM_CAPTURE))
 122                                 continue;
 123                         if ((cur_attr == USB_ENDPOINT_SYNC_ASYNC &&
 124                              subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
 125                             (cur_attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
 126                              subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
 127                                 found = fp;
 128                                 cur_attr = attr;
 129                                 continue;
 130                         }
 131                 }
 132                 /* find the format with the largest max. packet size */
 133                 if (fp->maxpacksize > found->maxpacksize) {
 134                         found = fp;
 135                         cur_attr = attr;
 136                 }
 137         }
 138         return found;
 139 }
 140
 141 static int init_pitch_v1(struct snd_usb_audio *chip, int iface,
 142                          struct usb_host_interface *alts,
 143                          struct audioformat *fmt)
 144 {
 145         struct usb_device *dev = chip->dev;
 146         unsigned int ep;
 147         unsigned char data[1];
 148         int err;
 149
 150         if (get_iface_desc(alts)->bNumEndpoints < 1)
 151                 return -EINVAL;
 152         ep = get_endpoint(alts, 0)->bEndpointAddress;
 153
 154         data[0] = 1;
 155         err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
 156                               USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
 157                               UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep,
 158                               data, sizeof(data));
 159         if (err < 0) {
 160                 usb_audio_err(chip, "%d:%d: cannot set enable PITCH\n",
 161                               iface, ep);
 162                 return err;
 163         }
 164
 165         return 0;
 166 }
 167
 168 static int init_pitch_v2(struct snd_usb_audio *chip, int iface,
 169                          struct usb_host_interface *alts,
 170                          struct audioformat *fmt)
 171 {
 172         struct usb_device *dev = chip->dev;
 173         unsigned char data[1];
 174         int err;
 175
 176         data[0] = 1;
 177         err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR,
 178                               USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 179                               UAC2_EP_CS_PITCH << 8, 0,
 180                               data, sizeof(data));
 181         if (err < 0) {
 182                 usb_audio_err(chip, "%d:%d: cannot set enable PITCH (v2)\n",
 183                               iface, fmt->altsetting);
 184                 return err;
 185         }
 186
 187         return 0;
 188 }
 189
 190 /*
 191  * initialize the pitch control and sample rate
 192  */
 193 int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface,
 194                        struct usb_host_interface *alts,
 195                        struct audioformat *fmt)
 196 {
 197         /* if endpoint doesn't have pitch control, bail out */
 198         if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL))
 199                 return 0;
 200
 201         switch (fmt->protocol) {
 202         case UAC_VERSION_1:
 203         default:
 204                 return init_pitch_v1(chip, iface, alts, fmt);
 205
 206         case UAC_VERSION_2:
 207                 return init_pitch_v2(chip, iface, alts, fmt);
 208         }
 209 }
 210
 211 static int start_endpoints(struct snd_usb_substream *subs)
 212 {
 213         int err;
 214
 215         if (!subs->data_endpoint)
 216                 return -EINVAL;
 217
 218         if (!test_and_set_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) {
 219                 struct snd_usb_endpoint *ep = subs->data_endpoint;
 220
 221                 dev_dbg(&subs->dev->dev, "Starting data EP @%p\n", ep);
 222
 223                 ep->data_subs = subs;
 224                 err = snd_usb_endpoint_start(ep);
 225                 if (err < 0) {
 226                         clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags);
 227                         return err;
 228                 }
 229         }
 230
 231         if (subs->sync_endpoint &&
 232             !test_and_set_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) {
 233                 struct snd_usb_endpoint *ep = subs->sync_endpoint;
 234
 235                 if (subs->data_endpoint->iface != subs->sync_endpoint->iface ||
 236                     subs->data_endpoint->altsetting != subs->sync_endpoint->altsetting) {
 237                         err = usb_set_interface(subs->dev,
 238                                                 subs->sync_endpoint->iface,
 239                                                 subs->sync_endpoint->altsetting);
 240                         if (err < 0) {
 241                                 clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags);
 242                                 dev_err(&subs->dev->dev,
 243                                            "%d:%d: cannot set interface (%d)\n",
 244                                            subs->sync_endpoint->iface,
 245                                            subs->sync_endpoint->altsetting, err);
 246                                 return -EIO;
 247                         }
 248                 }
 249
 250                 dev_dbg(&subs->dev->dev, "Starting sync EP @%p\n", ep);
 251
 252                 ep->sync_slave = subs->data_endpoint;
 253                 err = snd_usb_endpoint_start(ep);
 254                 if (err < 0) {
 255                         clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags);
 256                         return err;
 257                 }
 258         }
 259
 260         return 0;
 261 }
 262
 263 static void stop_endpoints(struct snd_usb_substream *subs, bool wait)
 264 {
 265         if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags))
 266                 snd_usb_endpoint_stop(subs->sync_endpoint);
 267
 268         if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags))
 269                 snd_usb_endpoint_stop(subs->data_endpoint);
 270
 271         if (wait) {
 272                 snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
 273                 snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
 274         }
 275 }
 276
 277 static int search_roland_implicit_fb(struct usb_device *dev, int ifnum,
 278                                      unsigned int altsetting,
 279                                      struct usb_host_interface **alts,
 280                                      unsigned int *ep)
 281 {
 282         struct usb_interface *iface;
 283         struct usb_interface_descriptor *altsd;
 284         struct usb_endpoint_descriptor *epd;
 285
 286         iface = usb_ifnum_to_if(dev, ifnum);
 287         if (!iface || iface->num_altsetting < altsetting + 1)
 288                 return -ENOENT;
 289         *alts = &iface->altsetting[altsetting];
 290         altsd = get_iface_desc(*alts);
 291         if (altsd->bAlternateSetting != altsetting ||
 292             altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC ||
 293             (altsd->bInterfaceSubClass != 2 &&
 294              altsd->bInterfaceProtocol != 2   ) ||
 295             altsd->bNumEndpoints < 1)
 296                 return -ENOENT;
 297         epd = get_endpoint(*alts, 0);
 298         if (!usb_endpoint_is_isoc_in(epd) ||
 299             (epd->bmAttributes & USB_ENDPOINT_USAGE_MASK) !=
 300                                         USB_ENDPOINT_USAGE_IMPLICIT_FB)
 301                 return -ENOENT;
 302         *ep = epd->bEndpointAddress;
 303         return 0;
 304 }
 305
 306 /* Setup an implicit feedback endpoint from a quirk. Returns 0 if no quirk
 307  * applies. Returns 1 if a quirk was found.
 308  */
 309 static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs,
 310                                          struct usb_device *dev,
 311                                          struct usb_interface_descriptor *altsd,
 312                                          unsigned int attr)
 313 {
 314         struct usb_host_interface *alts;
 315         struct usb_interface *iface;
 316         unsigned int ep;
 317         unsigned int ifnum;
 318
 319         /* Implicit feedback sync EPs consumers are always playback EPs */
 320         if (subs->direction != SNDRV_PCM_STREAM_PLAYBACK)
 321                 return 0;
 322
 323         switch (subs->stream->chip->usb_id) {
 324         case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
 325         case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */
 326         case USB_ID(0x22f0, 0x0006): /* Allen&Heath Qu-16 */
 327                 ep = 0x81;
 328                 ifnum = 3;
 329                 goto add_sync_ep_from_ifnum;
 330         case USB_ID(0x0763, 0x2080): /* M-Audio FastTrack Ultra */
 331         case USB_ID(0x0763, 0x2081):
 332                 ep = 0x81;
 333                 ifnum = 2;
 334                 goto add_sync_ep_from_ifnum;
 335         case USB_ID(0x2466, 0x8003): /* Fractal Audio Axe-Fx II */
 336         case USB_ID(0x0499, 0x172a): /* Yamaha MODX */
 337                 ep = 0x86;
 338                 ifnum = 2;
 339                 goto add_sync_ep_from_ifnum;
 340         case USB_ID(0x2466, 0x8010): /* Fractal Audio Axe-Fx III */
 341                 ep = 0x81;
 342                 ifnum = 2;
 343                 goto add_sync_ep_from_ifnum;
 344         case USB_ID(0x1686, 0xf029): /* Zoom UAC-2 */
 345                 ep = 0x82;
 346                 ifnum = 2;
 347                 goto add_sync_ep_from_ifnum;
 348         case USB_ID(0x1397, 0x0001): /* Behringer UFX1604 */
 349         case USB_ID(0x1397, 0x0002): /* Behringer UFX1204 */
 350                 ep = 0x81;
 351                 ifnum = 1;
 352                 goto add_sync_ep_from_ifnum;
 353         case USB_ID(0x07fd, 0x0004): /* MOTU MicroBook II/IIc */
 354                 /* MicroBook IIc */
 355                 if (altsd->bInterfaceClass == USB_CLASS_AUDIO)
 356                         return 0;
 357
 358                 /* MicroBook II */
 359                 ep = 0x84;
 360                 ifnum = 0;
 361                 goto add_sync_ep_from_ifnum;
 362         case USB_ID(0x07fd, 0x0008): /* MOTU M Series */
 363         case USB_ID(0x31e9, 0x0001): /* Solid State Logic SSL2 */
 364         case USB_ID(0x31e9, 0x0002): /* Solid State Logic SSL2+ */
 365         case USB_ID(0x0499, 0x172f): /* Steinberg UR22C */
 366         case USB_ID(0x0d9a, 0x00df): /* RTX6001 */
 367                 ep = 0x81;
 368                 ifnum = 2;
 369                 goto add_sync_ep_from_ifnum;
 370         case USB_ID(0x0582, 0x01d8): /* BOSS Katana */
 371                 /* BOSS Katana amplifiers do not need quirks */
 372                 return 0;
 373         }
 374
 375         if (attr == USB_ENDPOINT_SYNC_ASYNC &&
 376             altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
 377             altsd->bInterfaceProtocol == 2 &&
 378             altsd->bNumEndpoints == 1 &&
 379             USB_ID_VENDOR(subs->stream->chip->usb_id) == 0x0582 /* Roland */ &&
 380             search_roland_implicit_fb(dev, altsd->bInterfaceNumber + 1,
 381                                       altsd->bAlternateSetting,
 382                                       &alts, &ep) >= 0) {
 383                 goto add_sync_ep;
 384         }
 385
 386         /* No quirk */
 387         return 0;
 388
 389 add_sync_ep_from_ifnum:
 390         iface = usb_ifnum_to_if(dev, ifnum);
 391
 392         if (!iface || iface->num_altsetting < 2)
 393                 return -EINVAL;
 394
 395         alts = &iface->altsetting[1];
 396
 397 add_sync_ep:
 398         subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip,
 399                                                    alts, ep, !subs->direction,
 400                                                    SND_USB_ENDPOINT_TYPE_DATA);
 401         if (!subs->sync_endpoint)
 402                 return -EINVAL;
 403
 404         subs->sync_endpoint->is_implicit_feedback = 1;
 405
 406         subs->data_endpoint->sync_master = subs->sync_endpoint;
 407
 408         return 1;
 409 }
 410
 411 static int set_sync_endpoint(struct snd_usb_substream *subs,
 412                              struct audioformat *fmt,
 413                              struct usb_device *dev,
 414                              struct usb_host_interface *alts,
 415                              struct usb_interface_descriptor *altsd)
 416 {
 417         int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
 418         unsigned int ep, attr;
 419         bool implicit_fb;
 420         int err;
 421
 422         /* we need a sync pipe in async OUT or adaptive IN mode */
 423         /* check the number of EP, since some devices have broken
 424          * descriptors which fool us.  if it has only one EP,
 425          * assume it as adaptive-out or sync-in.
 426          */
 427         attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
 428
 429         if ((is_playback && (attr != USB_ENDPOINT_SYNC_ASYNC)) ||
 430                 (!is_playback && (attr != USB_ENDPOINT_SYNC_ADAPTIVE))) {
 431
 432                 /*
 433                  * In these modes the notion of sync_endpoint is irrelevant.
 434                  * Reset pointers to avoid using stale data from previously
 435                  * used settings, e.g. when configuration and endpoints were
 436                  * changed
 437                  */
 438
 439                 subs->sync_endpoint = NULL;
 440                 subs->data_endpoint->sync_master = NULL;
 441         }
 442
 443         err = set_sync_ep_implicit_fb_quirk(subs, dev, altsd, attr);
 444         if (err < 0)
 445                 return err;
 446
 447         /* endpoint set by quirk */
 448         if (err > 0)
 449                 return 0;
 450
 451         if (altsd->bNumEndpoints < 2)
 452                 return 0;
 453
 454         if ((is_playback && (attr == USB_ENDPOINT_SYNC_SYNC ||
 455                              attr == USB_ENDPOINT_SYNC_ADAPTIVE)) ||
 456             (!is_playback && attr != USB_ENDPOINT_SYNC_ADAPTIVE))
 457                 return 0;
 458
 459         /*
 460          * In case of illegal SYNC_NONE for OUT endpoint, we keep going to see
 461          * if we don't find a sync endpoint, as on M-Audio Transit. In case of
 462          * error fall back to SYNC mode and don't create sync endpoint
 463          */
 464
 465         /* check sync-pipe endpoint */
 466         /* ... and check descriptor size before accessing bSynchAddress
 467            because there is a version of the SB Audigy 2 NX firmware lacking
 468            the audio fields in the endpoint descriptors */
 469         if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_ISOC ||
 470             (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
 471              get_endpoint(alts, 1)->bSynchAddress != 0)) {
 472                 dev_err(&dev->dev,
 473                         "%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x\n",
 474                            fmt->iface, fmt->altsetting,
 475                            get_endpoint(alts, 1)->bmAttributes,
 476                            get_endpoint(alts, 1)->bLength,
 477                            get_endpoint(alts, 1)->bSynchAddress);
 478                 if (is_playback && attr == USB_ENDPOINT_SYNC_NONE)
 479                         return 0;
 480                 return -EINVAL;
 481         }
 482         ep = get_endpoint(alts, 1)->bEndpointAddress;
 483         if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
 484             get_endpoint(alts, 0)->bSynchAddress != 0 &&
 485             ((is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
 486              (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
 487                 dev_err(&dev->dev,
 488                         "%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x\n",
 489                            fmt->iface, fmt->altsetting,
 490                            is_playback, ep, get_endpoint(alts, 0)->bSynchAddress);
 491                 if (is_playback && attr == USB_ENDPOINT_SYNC_NONE)
 492                         return 0;
 493                 return -EINVAL;
 494         }
 495
 496         implicit_fb = (get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_USAGE_MASK)
 497                         == USB_ENDPOINT_USAGE_IMPLICIT_FB;
 498
 499         subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip,
 500                                                    alts, ep, !subs->direction,
 501                                                    implicit_fb ?
 502                                                         SND_USB_ENDPOINT_TYPE_DATA :
 503                                                         SND_USB_ENDPOINT_TYPE_SYNC);
 504
 505         if (!subs->sync_endpoint) {
 506                 if (is_playback && attr == USB_ENDPOINT_SYNC_NONE)
 507                         return 0;
 508                 return -EINVAL;
 509         }
 510
 511         subs->sync_endpoint->is_implicit_feedback = implicit_fb;
 512
 513         subs->data_endpoint->sync_master = subs->sync_endpoint;
 514
 515         return 0;
 516 }
 517
 518 /*
 519  * find a matching format and set up the interface
 520  */
 521 static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
 522 {
 523         struct usb_device *dev = subs->dev;
 524         struct usb_host_interface *alts;
 525         struct usb_interface_descriptor *altsd;
 526         struct usb_interface *iface;
 527         int err;
 528
 529         iface = usb_ifnum_to_if(dev, fmt->iface);
 530         if (WARN_ON(!iface))
 531                 return -EINVAL;
 532         alts = usb_altnum_to_altsetting(iface, fmt->altsetting);
 533         if (WARN_ON(!alts))
 534                 return -EINVAL;
 535         altsd = get_iface_desc(alts);
 536
 537         if (fmt == subs->cur_audiofmt && !subs->need_setup_fmt)
 538                 return 0;
 539
 540         /* close the old interface */
 541         if (subs->interface >= 0 && (subs->interface != fmt->iface || subs->need_setup_fmt)) {
 542                 if (!subs->stream->chip->keep_iface) {
 543                         err = usb_set_interface(subs->dev, subs->interface, 0);
 544                         if (err < 0) {
 545                                 dev_err(&dev->dev,
 546                                         "%d:%d: return to setting 0 failed (%d)\n",
 547                                         fmt->iface, fmt->altsetting, err);
 548                                 return -EIO;
 549                         }
 550                 }
 551                 subs->interface = -1;
 552                 subs->altset_idx = 0;
 553         }
 554
 555         if (subs->need_setup_fmt)
 556                 subs->need_setup_fmt = false;
 557
 558         /* set interface */
 559         if (iface->cur_altsetting != alts) {
 560                 err = snd_usb_select_mode_quirk(subs, fmt);
 561                 if (err < 0)
 562                         return -EIO;
 563
 564                 err = usb_set_interface(dev, fmt->iface, fmt->altsetting);
 565                 if (err < 0) {
 566                         dev_err(&dev->dev,
 567                                 "%d:%d: usb_set_interface failed (%d)\n",
 568                                 fmt->iface, fmt->altsetting, err);
 569                         return -EIO;
 570                 }
 571                 dev_dbg(&dev->dev, "setting usb interface %d:%d\n",
 572                         fmt->iface, fmt->altsetting);
 573                 snd_usb_set_interface_quirk(dev);
 574         }
 575
 576         subs->interface = fmt->iface;
 577         subs->altset_idx = fmt->altset_idx;
 578         subs->data_endpoint = snd_usb_add_endpoint(subs->stream->chip,
 579                                                    alts, fmt->endpoint, subs->direction,
 580                                                    SND_USB_ENDPOINT_TYPE_DATA);
 581
 582         if (!subs->data_endpoint)
 583                 return -EINVAL;
 584
 585         err = set_sync_endpoint(subs, fmt, dev, alts, altsd);
 586         if (err < 0)
 587                 return err;
 588
 589         err = snd_usb_init_pitch(subs->stream->chip, fmt->iface, alts, fmt);
 590         if (err < 0)
 591                 return err;
 592
 593         subs->cur_audiofmt = fmt;
 594
 595         snd_usb_set_format_quirk(subs, fmt);
 596
 597         return 0;
 598 }
 599
 600 /*
 601  * Return the score of matching two audioformats.
 602  * Veto the audioformat if:
 603  * - It has no channels for some reason.
 604  * - Requested PCM format is not supported.
 605  * - Requested sample rate is not supported.
 606  */
 607 static int match_endpoint_audioformats(struct snd_usb_substream *subs,
 608                                        struct audioformat *fp,
 609                                        struct audioformat *match, int rate,
 610                                        snd_pcm_format_t pcm_format)
 611 {
 612         int i;
 613         int score = 0;
 614
 615         if (fp->channels < 1) {
 616                 dev_dbg(&subs->dev->dev,
 617                         "%s: (fmt @%p) no channels\n", __func__, fp);
 618                 return 0;
 619         }
 620
 621         if (!(fp->formats & pcm_format_to_bits(pcm_format))) {
 622                 dev_dbg(&subs->dev->dev,
 623                         "%s: (fmt @%p) no match for format %d\n", __func__,
 624                         fp, pcm_format);
 625                 return 0;
 626         }
 627
 628         for (i = 0; i < fp->nr_rates; i++) {
 629                 if (fp->rate_table[i] == rate) {
 630                         score++;
 631                         break;
 632                 }
 633         }
 634         if (!score) {
 635                 dev_dbg(&subs->dev->dev,
 636                         "%s: (fmt @%p) no match for rate %d\n", __func__,
 637                         fp, rate);
 638                 return 0;
 639         }
 640
 641         if (fp->channels == match->channels)
 642                 score++;
 643
 644         dev_dbg(&subs->dev->dev,
 645                 "%s: (fmt @%p) score %d\n", __func__, fp, score);
 646
 647         return score;
 648 }
 649
 650 /*
 651  * Configure the sync ep using the rate and pcm format of the data ep.
 652  */
 653 static int configure_sync_endpoint(struct snd_usb_substream *subs)
 654 {
 655         int ret;
 656         struct audioformat *fp;
 657         struct audioformat *sync_fp = NULL;
 658         int cur_score = 0;
 659         int sync_period_bytes = subs->period_bytes;
 660         struct snd_usb_substream *sync_subs =
 661                 &subs->stream->substream[subs->direction ^ 1];
 662
 663         if (subs->sync_endpoint->type != SND_USB_ENDPOINT_TYPE_DATA ||
 664             !subs->stream)
 665                 return snd_usb_endpoint_set_params(subs->sync_endpoint,
 666                                                    subs->pcm_format,
 667                                                    subs->channels,
 668                                                    subs->period_bytes,
 669                                                    0, 0,
 670                                                    subs->cur_rate,
 671                                                    subs->cur_audiofmt,
 672                                                    NULL);
 673
 674         /* Try to find the best matching audioformat. */
 675         list_for_each_entry(fp, &sync_subs->fmt_list, list) {
 676                 int score = match_endpoint_audioformats(subs,
 677                                                         fp, subs->cur_audiofmt,
 678                         subs->cur_rate, subs->pcm_format);
 679
 680                 if (score > cur_score) {
 681                         sync_fp = fp;
 682                         cur_score = score;
 683                 }
 684         }
 685
 686         if (unlikely(sync_fp == NULL)) {
 687                 dev_err(&subs->dev->dev,
 688                         "%s: no valid audioformat for sync ep %x found\n",
 689                         __func__, sync_subs->ep_num);
 690                 return -EINVAL;
 691         }
 692
 693         /*
 694          * Recalculate the period bytes if channel number differ between
 695          * data and sync ep audioformat.
 696          */
 697         if (sync_fp->channels != subs->channels) {
 698                 sync_period_bytes = (subs->period_bytes / subs->channels) *
 699                         sync_fp->channels;
 700                 dev_dbg(&subs->dev->dev,
 701                         "%s: adjusted sync ep period bytes (%d -> %d)\n",
 702                         __func__, subs->period_bytes, sync_period_bytes);
 703         }
 704
 705         ret = snd_usb_endpoint_set_params(subs->sync_endpoint,
 706                                           subs->pcm_format,
 707                                           sync_fp->channels,
 708                                           sync_period_bytes,
 709                                           0, 0,
 710                                           subs->cur_rate,
 711                                           sync_fp,
 712                                           NULL);
 713
 714         return ret;
 715 }
 716
 717 /*
 718  * configure endpoint params
 719  *
 720  * called  during initial setup and upon resume
 721  */
 722 static int configure_endpoint(struct snd_usb_substream *subs)
 723 {
 724         int ret;
 725
 726         /* format changed */
 727         stop_endpoints(subs, true);
 728         ret = snd_usb_endpoint_set_params(subs->data_endpoint,
 729                                           subs->pcm_format,
 730                                           subs->channels,
 731                                           subs->period_bytes,
 732                                           subs->period_frames,
 733                                           subs->buffer_periods,
 734                                           subs->cur_rate,
 735                                           subs->cur_audiofmt,
 736                                           subs->sync_endpoint);
 737         if (ret < 0)
 738                 return ret;
 739
 740         if (subs->sync_endpoint)
 741                 ret = configure_sync_endpoint(subs);
 742
 743         return ret;
 744 }
 745
 746 static int snd_usb_pcm_change_state(struct snd_usb_substream *subs, int state)
 747 {
 748         int ret;
 749
 750         if (!subs->str_pd)
 751                 return 0;
 752
 753         ret = snd_usb_power_domain_set(subs->stream->chip, subs->str_pd, state);
 754         if (ret < 0) {
 755                 dev_err(&subs->dev->dev,
 756                         "Cannot change Power Domain ID: %d to state: %d. Err: %d\n",
 757                         subs->str_pd->pd_id, state, ret);
 758                 return ret;
 759         }
 760
 761         return 0;
 762 }
 763
 764 int snd_usb_pcm_suspend(struct snd_usb_stream *as)
 765 {
 766         int ret;
 767
 768         ret = snd_usb_pcm_change_state(&as->substream[0], UAC3_PD_STATE_D2);
 769         if (ret < 0)
 770                 return ret;
 771
 772         ret = snd_usb_pcm_change_state(&as->substream[1], UAC3_PD_STATE_D2);
 773         if (ret < 0)
 774                 return ret;
 775
 776         return 0;
 777 }
 778
 779 int snd_usb_pcm_resume(struct snd_usb_stream *as)
 780 {
 781         int ret;
 782
 783         ret = snd_usb_pcm_change_state(&as->substream[0], UAC3_PD_STATE_D1);
 784         if (ret < 0)
 785                 return ret;
 786
 787         ret = snd_usb_pcm_change_state(&as->substream[1], UAC3_PD_STATE_D1);
 788         if (ret < 0)
 789                 return ret;
 790
 791         return 0;
 792 }
 793
 794 /*
 795  * hw_params callback
 796  *
 797  * allocate a buffer and set the given audio format.
 798  *
 799  * so far we use a physically linear buffer although packetize transfer
 800  * doesn't need a continuous area.
 801  * if sg buffer is supported on the later version of alsa, we'll follow
 802  * that.
 803  */
 804 static int snd_usb_hw_params(struct snd_pcm_substream *substream,
 805                              struct snd_pcm_hw_params *hw_params)
 806 {
 807         struct snd_usb_substream *subs = substream->runtime->private_data;
 808         struct audioformat *fmt;
 809         int ret;
 810
 811         ret = snd_media_start_pipeline(subs);
 812         if (ret)
 813                 return ret;
 814
 815         if (snd_usb_use_vmalloc)
 816                 ret = snd_pcm_lib_alloc_vmalloc_buffer(substream,
 817                                                        params_buffer_bytes(hw_params));
 818         else
 819                 ret = snd_pcm_lib_malloc_pages(substream,
 820                                                params_buffer_bytes(hw_params));
 821         if (ret < 0)
 822                 goto stop_pipeline;
 823
 824         subs->pcm_format = params_format(hw_params);
 825         subs->period_bytes = params_period_bytes(hw_params);
 826         subs->period_frames = params_period_size(hw_params);
 827         subs->buffer_periods = params_periods(hw_params);
 828         subs->channels = params_channels(hw_params);
 829         subs->cur_rate = params_rate(hw_params);
 830
 831         fmt = find_format(subs);
 832         if (!fmt) {
 833                 dev_dbg(&subs->dev->dev,
 834                         "cannot set format: format = %#x, rate = %d, channels = %d\n",
 835                            subs->pcm_format, subs->cur_rate, subs->channels);
 836                 ret = -EINVAL;
 837                 goto stop_pipeline;
 838         }
 839
 840         ret = snd_usb_lock_shutdown(subs->stream->chip);
 841         if (ret < 0)
 842                 goto stop_pipeline;
 843
 844         ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D0);
 845         if (ret < 0)
 846                 goto unlock;
 847
 848         ret = set_format(subs, fmt);
 849         if (ret < 0)
 850                 goto unlock;
 851
 852         subs->interface = fmt->iface;
 853         subs->altset_idx = fmt->altset_idx;
 854         subs->need_setup_ep = true;
 855
 856  unlock:
 857         snd_usb_unlock_shutdown(subs->stream->chip);
 858         if (ret < 0)
 859                 goto stop_pipeline;
 860         return ret;
 861
 862  stop_pipeline:
 863         snd_media_stop_pipeline(subs);
 864         return ret;
 865 }
 866
 867 /*
 868  * hw_free callback
 869  *
 870  * reset the audio format and release the buffer
 871  */
 872 static int snd_usb_hw_free(struct snd_pcm_substream *substream)
 873 {
 874         struct snd_usb_substream *subs = substream->runtime->private_data;
 875
 876         snd_media_stop_pipeline(subs);
 877         subs->cur_audiofmt = NULL;
 878         subs->cur_rate = 0;
 879         subs->period_bytes = 0;
 880         if (!snd_usb_lock_shutdown(subs->stream->chip)) {
 881                 stop_endpoints(subs, true);
 882                 snd_usb_endpoint_deactivate(subs->sync_endpoint);
 883                 snd_usb_endpoint_deactivate(subs->data_endpoint);
 884                 snd_usb_unlock_shutdown(subs->stream->chip);
 885         }
 886
 887         if (snd_usb_use_vmalloc)
 888                 return snd_pcm_lib_free_vmalloc_buffer(substream);
 889         else
 890                 return snd_pcm_lib_free_pages(substream);
 891 }
 892
 893 /*
 894  * prepare callback
 895  *
 896  * only a few subtle things...
 897  */
 898 static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
 899 {
 900         struct snd_pcm_runtime *runtime = substream->runtime;
 901         struct snd_usb_substream *subs = runtime->private_data;
 902         struct usb_host_interface *alts;
 903         struct usb_interface *iface;
 904         int ret;
 905
 906         if (! subs->cur_audiofmt) {
 907                 dev_err(&subs->dev->dev, "no format is specified!\n");
 908                 return -ENXIO;
 909         }
 910
 911         ret = snd_usb_lock_shutdown(subs->stream->chip);
 912         if (ret < 0)
 913                 return ret;
 914         if (snd_BUG_ON(!subs->data_endpoint)) {
 915                 ret = -EIO;
 916                 goto unlock;
 917         }
 918
 919         snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
 920         snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
 921
 922         ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D0);
 923         if (ret < 0)
 924                 goto unlock;
 925
 926         ret = set_format(subs, subs->cur_audiofmt);
 927         if (ret < 0)
 928                 goto unlock;
 929
 930         if (subs->need_setup_ep) {
 931
 932                 iface = usb_ifnum_to_if(subs->dev, subs->cur_audiofmt->iface);
 933                 alts = &iface->altsetting[subs->cur_audiofmt->altset_idx];
 934                 ret = snd_usb_init_sample_rate(subs->stream->chip,
 935                                                subs->cur_audiofmt->iface,
 936                                                alts,
 937                                                subs->cur_audiofmt,
 938                                                subs->cur_rate);
 939                 if (ret < 0)
 940                         goto unlock;
 941
 942                 ret = configure_endpoint(subs);
 943                 if (ret < 0)
 944                         goto unlock;
 945                 subs->need_setup_ep = false;
 946         }
 947
 948         /* some unit conversions in runtime */
 949         subs->data_endpoint->maxframesize =
 950                 bytes_to_frames(runtime, subs->data_endpoint->maxpacksize);
 951         subs->data_endpoint->curframesize =
 952                 bytes_to_frames(runtime, subs->data_endpoint->curpacksize);
 953
 954         /* reset the pointer */
 955         subs->hwptr_done = 0;
 956         subs->transfer_done = 0;
 957         subs->last_delay = 0;
 958         subs->last_frame_number = 0;
 959         runtime->delay = 0;
 960
 961         /* for playback, submit the URBs now; otherwise, the first hwptr_done
 962          * updates for all URBs would happen at the same time when starting */
 963         if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK)
 964                 ret = start_endpoints(subs);
 965
 966  unlock:
 967         snd_usb_unlock_shutdown(subs->stream->chip);
 968         return ret;
 969 }
 970
 971 static const struct snd_pcm_hardware snd_usb_hardware =
 972 {
 973         .info =                 SNDRV_PCM_INFO_MMAP |
 974                                 SNDRV_PCM_INFO_MMAP_VALID |
 975                                 SNDRV_PCM_INFO_BATCH |
 976                                 SNDRV_PCM_INFO_INTERLEAVED |
 977                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
 978                                 SNDRV_PCM_INFO_PAUSE,
 979         .buffer_bytes_max =     1024 * 1024,
 980         .period_bytes_min =     64,
 981         .period_bytes_max =     512 * 1024,
 982         .periods_min =          2,
 983         .periods_max =          1024,
 984 };
 985
 986 static int hw_check_valid_format(struct snd_usb_substream *subs,
 987                                  struct snd_pcm_hw_params *params,
 988                                  struct audioformat *fp)
 989 {
 990         struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 991         struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 992         struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 993         struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
 994         struct snd_mask check_fmts;
 995         unsigned int ptime;
 996
 997         /* check the format */
 998         snd_mask_none(&check_fmts);
 999         check_fmts.bits[0] = (u32)fp->formats;
1000         check_fmts.bits[1] = (u32)(fp->formats >> 32);
1001         snd_mask_intersect(&check_fmts, fmts);
1002         if (snd_mask_empty(&check_fmts)) {
1003                 hwc_debug("   > check: no supported format %d\n", fp->format);
1004                 return 0;
1005         }
1006         /* check the channels */
1007         if (fp->channels < ct->min || fp->channels > ct->max) {
1008                 hwc_debug("   > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
1009                 return 0;
1010         }
1011         /* check the rate is within the range */
1012         if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
1013                 hwc_debug("   > check: rate_min %d > max %d\n", fp->rate_min, it->max);
1014                 return 0;
1015         }
1016         if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
1017                 hwc_debug("   > check: rate_max %d < min %d\n", fp->rate_max, it->min);
1018                 return 0;
1019         }
1020         /* check whether the period time is >= the data packet interval */
1021         if (subs->speed != USB_SPEED_FULL) {
1022                 ptime = 125 * (1 << fp->datainterval);
1023                 if (ptime > pt->max || (ptime == pt->max && pt->openmax)) {
1024                         hwc_debug("   > check: ptime %u > max %u\n", ptime, pt->max);
1025                         return 0;
1026                 }
1027         }
1028         return 1;
1029 }
1030
1031 static int hw_rule_rate(struct snd_pcm_hw_params *params,
1032                         struct snd_pcm_hw_rule *rule)
1033 {
1034         struct snd_usb_substream *subs = rule->private;
1035         struct audioformat *fp;
1036         struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1037         unsigned int rmin, rmax;
1038         int changed;
1039
1040         hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
1041         changed = 0;
1042         rmin = rmax = 0;
1043         list_for_each_entry(fp, &subs->fmt_list, list) {
1044                 if (!hw_check_valid_format(subs, params, fp))
1045                         continue;
1046                 if (changed++) {
1047                         if (rmin > fp->rate_min)
1048                                 rmin = fp->rate_min;
1049                         if (rmax < fp->rate_max)
1050                                 rmax = fp->rate_max;
1051                 } else {
1052                         rmin = fp->rate_min;
1053                         rmax = fp->rate_max;
1054                 }
1055         }
1056
1057         if (!changed) {
1058                 hwc_debug("  --> get empty\n");
1059                 it->empty = 1;
1060                 return -EINVAL;
1061         }
1062
1063         changed = 0;
1064         if (it->min < rmin) {
1065                 it->min = rmin;
1066                 it->openmin = 0;
1067                 changed = 1;
1068         }
1069         if (it->max > rmax) {
1070                 it->max = rmax;
1071                 it->openmax = 0;
1072                 changed = 1;
1073         }
1074         if (snd_interval_checkempty(it)) {
1075                 it->empty = 1;
1076                 return -EINVAL;
1077         }
1078         hwc_debug("  --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1079         return changed;
1080 }
1081
1082
1083 static int hw_rule_channels(struct snd_pcm_hw_params *params,
1084                             struct snd_pcm_hw_rule *rule)
1085 {
1086         struct snd_usb_substream *subs = rule->private;
1087         struct audioformat *fp;
1088         struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1089         unsigned int rmin, rmax;
1090         int changed;
1091
1092         hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
1093         changed = 0;
1094         rmin = rmax = 0;
1095         list_for_each_entry(fp, &subs->fmt_list, list) {
1096                 if (!hw_check_valid_format(subs, params, fp))
1097                         continue;
1098                 if (changed++) {
1099                         if (rmin > fp->channels)
1100                                 rmin = fp->channels;
1101                         if (rmax < fp->channels)
1102                                 rmax = fp->channels;
1103                 } else {
1104                         rmin = fp->channels;
1105                         rmax = fp->channels;
1106                 }
1107         }
1108
1109         if (!changed) {
1110                 hwc_debug("  --> get empty\n");
1111                 it->empty = 1;
1112                 return -EINVAL;
1113         }
1114
1115         changed = 0;
1116         if (it->min < rmin) {
1117                 it->min = rmin;
1118                 it->openmin = 0;
1119                 changed = 1;
1120         }
1121         if (it->max > rmax) {
1122                 it->max = rmax;
1123                 it->openmax = 0;
1124                 changed = 1;
1125         }
1126         if (snd_interval_checkempty(it)) {
1127                 it->empty = 1;
1128                 return -EINVAL;
1129         }
1130         hwc_debug("  --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1131         return changed;
1132 }
1133
1134 static int hw_rule_format(struct snd_pcm_hw_params *params,
1135                           struct snd_pcm_hw_rule *rule)
1136 {
1137         struct snd_usb_substream *subs = rule->private;
1138         struct audioformat *fp;
1139         struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1140         u64 fbits;
1141         u32 oldbits[2];
1142         int changed;
1143
1144         hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
1145         fbits = 0;
1146         list_for_each_entry(fp, &subs->fmt_list, list) {
1147                 if (!hw_check_valid_format(subs, params, fp))
1148                         continue;
1149                 fbits |= fp->formats;
1150         }
1151
1152         oldbits[0] = fmt->bits[0];
1153         oldbits[1] = fmt->bits[1];
1154         fmt->bits[0] &= (u32)fbits;
1155         fmt->bits[1] &= (u32)(fbits >> 32);
1156         if (!fmt->bits[0] && !fmt->bits[1]) {
1157                 hwc_debug("  --> get empty\n");
1158                 return -EINVAL;
1159         }
1160         changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1161         hwc_debug("  --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1162         return changed;
1163 }
1164
1165 static int hw_rule_period_time(struct snd_pcm_hw_params *params,
1166                                struct snd_pcm_hw_rule *rule)
1167 {
1168         struct snd_usb_substream *subs = rule->private;
1169         struct audioformat *fp;
1170         struct snd_interval *it;
1171         unsigned char min_datainterval;
1172         unsigned int pmin;
1173         int changed;
1174
1175         it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
1176         hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max);
1177         min_datainterval = 0xff;
1178         list_for_each_entry(fp, &subs->fmt_list, list) {
1179                 if (!hw_check_valid_format(subs, params, fp))
1180                         continue;
1181                 min_datainterval = min(min_datainterval, fp->datainterval);
1182         }
1183         if (min_datainterval == 0xff) {
1184                 hwc_debug("  --> get empty\n");
1185                 it->empty = 1;
1186                 return -EINVAL;
1187         }
1188         pmin = 125 * (1 << min_datainterval);
1189         changed = 0;
1190         if (it->min < pmin) {
1191                 it->min = pmin;
1192                 it->openmin = 0;
1193                 changed = 1;
1194         }
1195         if (snd_interval_checkempty(it)) {
1196                 it->empty = 1;
1197                 return -EINVAL;
1198         }
1199         hwc_debug("  --> (%u,%u) (changed = %d)\n", it->min, it->max, changed);
1200         return changed;
1201 }
1202
1203 /*
1204  *  If the device supports unusual bit rates, does the request meet these?
1205  */
1206 static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
1207                                   struct snd_usb_substream *subs)
1208 {
1209         struct audioformat *fp;
1210         int *rate_list;
1211         int count = 0, needs_knot = 0;
1212         int err;
1213
1214         kfree(subs->rate_list.list);
1215         subs->rate_list.list = NULL;
1216
1217         list_for_each_entry(fp, &subs->fmt_list, list) {
1218                 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
1219                         return 0;
1220                 count += fp->nr_rates;
1221                 if (fp->rates & SNDRV_PCM_RATE_KNOT)
1222                         needs_knot = 1;
1223         }
1224         if (!needs_knot)
1225                 return 0;
1226
1227         subs->rate_list.list = rate_list =
1228                 kmalloc_array(count, sizeof(int), GFP_KERNEL);
1229         if (!subs->rate_list.list)
1230                 return -ENOMEM;
1231         subs->rate_list.count = count;
1232         subs->rate_list.mask = 0;
1233         count = 0;
1234         list_for_each_entry(fp, &subs->fmt_list, list) {
1235                 int i;
1236                 for (i = 0; i < fp->nr_rates; i++)
1237                         rate_list[count++] = fp->rate_table[i];
1238         }
1239         err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1240                                          &subs->rate_list);
1241         if (err < 0)
1242                 return err;
1243
1244         return 0;
1245 }
1246
1247
1248 /*
1249  * set up the runtime hardware information.
1250  */
1251
1252 static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
1253 {
1254         struct audioformat *fp;
1255         unsigned int pt, ptmin;
1256         int param_period_time_if_needed;
1257         int err;
1258
1259         runtime->hw.formats = subs->formats;
1260
1261         runtime->hw.rate_min = 0x7fffffff;
1262         runtime->hw.rate_max = 0;
1263         runtime->hw.channels_min = 256;
1264         runtime->hw.channels_max = 0;
1265         runtime->hw.rates = 0;
1266         ptmin = UINT_MAX;
1267         /* check min/max rates and channels */
1268         list_for_each_entry(fp, &subs->fmt_list, list) {
1269                 runtime->hw.rates |= fp->rates;
1270                 if (runtime->hw.rate_min > fp->rate_min)
1271                         runtime->hw.rate_min = fp->rate_min;
1272                 if (runtime->hw.rate_max < fp->rate_max)
1273                         runtime->hw.rate_max = fp->rate_max;
1274                 if (runtime->hw.channels_min > fp->channels)
1275                         runtime->hw.channels_min = fp->channels;
1276                 if (runtime->hw.channels_max < fp->channels)
1277                         runtime->hw.channels_max = fp->channels;
1278                 if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) {
1279                         /* FIXME: there might be more than one audio formats... */
1280                         runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1281                                 fp->frame_size;
1282                 }
1283                 pt = 125 * (1 << fp->datainterval);
1284                 ptmin = min(ptmin, pt);
1285         }
1286
1287         param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME;
1288         if (subs->speed == USB_SPEED_FULL)
1289                 /* full speed devices have fixed data packet interval */
1290                 ptmin = 1000;
1291         if (ptmin == 1000)
1292                 /* if period time doesn't go below 1 ms, no rules needed */
1293                 param_period_time_if_needed = -1;
1294
1295         err = snd_pcm_hw_constraint_minmax(runtime,
1296                                            SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1297                                            ptmin, UINT_MAX);
1298         if (err < 0)
1299                 return err;
1300
1301         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1302                                   hw_rule_rate, subs,
1303                                   SNDRV_PCM_HW_PARAM_FORMAT,
1304                                   SNDRV_PCM_HW_PARAM_CHANNELS,
1305                                   param_period_time_if_needed,
1306                                   -1);
1307         if (err < 0)
1308                 return err;
1309         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1310                                   hw_rule_channels, subs,
1311                                   SNDRV_PCM_HW_PARAM_FORMAT,
1312                                   SNDRV_PCM_HW_PARAM_RATE,
1313                                   param_period_time_if_needed,
1314                                   -1);
1315         if (err < 0)
1316                 return err;
1317         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1318                                   hw_rule_format, subs,
1319                                   SNDRV_PCM_HW_PARAM_RATE,
1320                                   SNDRV_PCM_HW_PARAM_CHANNELS,
1321                                   param_period_time_if_needed,
1322                                   -1);
1323         if (err < 0)
1324                 return err;
1325         if (param_period_time_if_needed >= 0) {
1326                 err = snd_pcm_hw_rule_add(runtime, 0,
1327                                           SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1328                                           hw_rule_period_time, subs,
1329                                           SNDRV_PCM_HW_PARAM_FORMAT,
1330                                           SNDRV_PCM_HW_PARAM_CHANNELS,
1331                                           SNDRV_PCM_HW_PARAM_RATE,
1332                                           -1);
1333                 if (err < 0)
1334                         return err;
1335         }
1336         err = snd_usb_pcm_check_knot(runtime, subs);
1337         if (err < 0)
1338                 return err;
1339
1340         return snd_usb_autoresume(subs->stream->chip);
1341 }
1342
1343 static int snd_usb_pcm_open(struct snd_pcm_substream *substream)
1344 {
1345         int direction = substream->stream;
1346         struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1347         struct snd_pcm_runtime *runtime = substream->runtime;
1348         struct snd_usb_substream *subs = &as->substream[direction];
1349         int ret;
1350
1351         subs->interface = -1;
1352         subs->altset_idx = 0;
1353         runtime->hw = snd_usb_hardware;
1354         runtime->private_data = subs;
1355         subs->pcm_substream = substream;
1356         /* runtime PM is also done there */
1357
1358         /* initialize DSD/DOP context */
1359         subs->dsd_dop.byte_idx = 0;
1360         subs->dsd_dop.channel = 0;
1361         subs->dsd_dop.marker = 1;
1362
1363         ret = setup_hw_info(runtime, subs);
1364         if (ret == 0) {
1365                 ret = snd_media_stream_init(subs, as->pcm, direction);
1366                 if (ret)
1367                         snd_usb_autosuspend(subs->stream->chip);
1368         }
1369         return ret;
1370 }
1371
1372 static int snd_usb_pcm_close(struct snd_pcm_substream *substream)
1373 {
1374         int direction = substream->stream;
1375         struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1376         struct snd_usb_substream *subs = &as->substream[direction];
1377         int ret;
1378
1379         stop_endpoints(subs, true);
1380         snd_media_stop_pipeline(subs);
1381
1382         if (!as->chip->keep_iface &&
1383             subs->interface >= 0 &&
1384             !snd_usb_lock_shutdown(subs->stream->chip)) {
1385                 usb_set_interface(subs->dev, subs->interface, 0);
1386                 subs->interface = -1;
1387                 ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D1);
1388                 snd_usb_unlock_shutdown(subs->stream->chip);
1389                 if (ret < 0)
1390                         return ret;
1391         }
1392
1393         subs->pcm_substream = NULL;
1394         snd_usb_autosuspend(subs->stream->chip);
1395
1396         return 0;
1397 }
1398
1399 /* Since a URB can handle only a single linear buffer, we must use double
1400  * buffering when the data to be transferred overflows the buffer boundary.
1401  * To avoid inconsistencies when updating hwptr_done, we use double buffering
1402  * for all URBs.
1403  */
1404 static void retire_capture_urb(struct snd_usb_substream *subs,
1405                                struct urb *urb)
1406 {
1407         struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1408         unsigned int stride, frames, bytes, oldptr;
1409         int i, period_elapsed = 0;
1410         unsigned long flags;
1411         unsigned char *cp;
1412         int current_frame_number;
1413
1414         /* read frame number here, update pointer in critical section */
1415         current_frame_number = usb_get_current_frame_number(subs->dev);
1416
1417         stride = runtime->frame_bits >> 3;
1418
1419         for (i = 0; i < urb->number_of_packets; i++) {
1420                 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset + subs->pkt_offset_adj;
1421                 if (urb->iso_frame_desc[i].status && printk_ratelimit()) {
1422                         dev_dbg(&subs->dev->dev, "frame %d active: %d\n",
1423                                 i, urb->iso_frame_desc[i].status);
1424                         // continue;
1425                 }
1426                 bytes = urb->iso_frame_desc[i].actual_length;
1427                 if (subs->stream_offset_adj > 0) {
1428                         unsigned int adj = min(subs->stream_offset_adj, bytes);
1429                         cp += adj;
1430                         bytes -= adj;
1431                         subs->stream_offset_adj -= adj;
1432                 }
1433                 frames = bytes / stride;
1434                 if (!subs->txfr_quirk)
1435                         bytes = frames * stride;
1436                 if (bytes % (runtime->sample_bits >> 3) != 0) {
1437                         int oldbytes = bytes;
1438                         bytes = frames * stride;
1439                         dev_warn_ratelimited(&subs->dev->dev,
1440                                  "Corrected urb data len. %d->%d\n",
1441                                                         oldbytes, bytes);
1442                 }
1443                 /* update the current pointer */
1444                 spin_lock_irqsave(&subs->lock, flags);
1445                 oldptr = subs->hwptr_done;
1446                 subs->hwptr_done += bytes;
1447                 if (subs->hwptr_done >= runtime->buffer_size * stride)
1448                         subs->hwptr_done -= runtime->buffer_size * stride;
1449                 frames = (bytes + (oldptr % stride)) / stride;
1450                 subs->transfer_done += frames;
1451                 if (subs->transfer_done >= runtime->period_size) {
1452                         subs->transfer_done -= runtime->period_size;
1453                         period_elapsed = 1;
1454                 }
1455                 /* capture delay is by construction limited to one URB,
1456                  * reset delays here
1457                  */
1458                 runtime->delay = subs->last_delay = 0;
1459
1460                 /* realign last_frame_number */
1461                 subs->last_frame_number = current_frame_number;
1462                 subs->last_frame_number &= 0xFF; /* keep 8 LSBs */
1463
1464                 spin_unlock_irqrestore(&subs->lock, flags);
1465                 /* copy a data chunk */
1466                 if (oldptr + bytes > runtime->buffer_size * stride) {
1467                         unsigned int bytes1 =
1468                                         runtime->buffer_size * stride - oldptr;
1469                         memcpy(runtime->dma_area + oldptr, cp, bytes1);
1470                         memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1);
1471                 } else {
1472                         memcpy(runtime->dma_area + oldptr, cp, bytes);
1473                 }
1474         }
1475
1476         if (period_elapsed)
1477                 snd_pcm_period_elapsed(subs->pcm_substream);
1478 }
1479
1480 static inline void fill_playback_urb_dsd_dop(struct snd_usb_substream *subs,
1481                                              struct urb *urb, unsigned int bytes)
1482 {
1483         struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1484         unsigned int stride = runtime->frame_bits >> 3;
1485         unsigned int dst_idx = 0;
1486         unsigned int src_idx = subs->hwptr_done;
1487         unsigned int wrap = runtime->buffer_size * stride;
1488         u8 *dst = urb->transfer_buffer;
1489         u8 *src = runtime->dma_area;
1490         u8 marker[] = { 0x05, 0xfa };
1491
1492         /*
1493          * The DSP DOP format defines a way to transport DSD samples over
1494          * normal PCM data endpoints. It requires stuffing of marker bytes
1495          * (0x05 and 0xfa, alternating per sample frame), and then expects
1496          * 2 additional bytes of actual payload. The whole frame is stored
1497          * LSB.
1498          *
1499          * Hence, for a stereo transport, the buffer layout looks like this,
1500          * where L refers to left channel samples and R to right.
1501          *
1502          *   L1 L2 0x05   R1 R2 0x05   L3 L4 0xfa  R3 R4 0xfa
1503          *   L5 L6 0x05   R5 R6 0x05   L7 L8 0xfa  R7 R8 0xfa
1504          *   .....
1505          *
1506          */
1507
1508         while (bytes--) {
1509                 if (++subs->dsd_dop.byte_idx == 3) {
1510                         /* frame boundary? */
1511                         dst[dst_idx++] = marker[subs->dsd_dop.marker];
1512                         src_idx += 2;
1513                         subs->dsd_dop.byte_idx = 0;
1514
1515                         if (++subs->dsd_dop.channel % runtime->channels == 0) {
1516                                 /* alternate the marker */
1517                                 subs->dsd_dop.marker++;
1518                                 subs->dsd_dop.marker %= ARRAY_SIZE(marker);
1519                                 subs->dsd_dop.channel = 0;
1520                         }
1521                 } else {
1522                         /* stuff the DSD payload */
1523                         int idx = (src_idx + subs->dsd_dop.byte_idx - 1) % wrap;
1524
1525                         if (subs->cur_audiofmt->dsd_bitrev)
1526                                 dst[dst_idx++] = bitrev8(src[idx]);
1527                         else
1528                                 dst[dst_idx++] = src[idx];
1529
1530                         subs->hwptr_done++;
1531                 }
1532         }
1533         if (subs->hwptr_done >= runtime->buffer_size * stride)
1534                 subs->hwptr_done -= runtime->buffer_size * stride;
1535 }
1536
1537 static void copy_to_urb(struct snd_usb_substream *subs, struct urb *urb,
1538                         int offset, int stride, unsigned int bytes)
1539 {
1540         struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1541
1542         if (subs->hwptr_done + bytes > runtime->buffer_size * stride) {
1543                 /* err, the transferred area goes over buffer boundary. */
1544                 unsigned int bytes1 =
1545                         runtime->buffer_size * stride - subs->hwptr_done;
1546                 memcpy(urb->transfer_buffer + offset,
1547                        runtime->dma_area + subs->hwptr_done, bytes1);
1548                 memcpy(urb->transfer_buffer + offset + bytes1,
1549                        runtime->dma_area, bytes - bytes1);
1550         } else {
1551                 memcpy(urb->transfer_buffer + offset,
1552                        runtime->dma_area + subs->hwptr_done, bytes);
1553         }
1554         subs->hwptr_done += bytes;
1555         if (subs->hwptr_done >= runtime->buffer_size * stride)
1556                 subs->hwptr_done -= runtime->buffer_size * stride;
1557 }
1558
1559 static unsigned int copy_to_urb_quirk(struct snd_usb_substream *subs,
1560                                       struct urb *urb, int stride,
1561                                       unsigned int bytes)
1562 {
1563         __le32 packet_length;
1564         int i;
1565
1566         /* Put __le32 length descriptor at start of each packet. */
1567         for (i = 0; i < urb->number_of_packets; i++) {
1568                 unsigned int length = urb->iso_frame_desc[i].length;
1569                 unsigned int offset = urb->iso_frame_desc[i].offset;
1570
1571                 packet_length = cpu_to_le32(length);
1572                 offset += i * sizeof(packet_length);
1573                 urb->iso_frame_desc[i].offset = offset;
1574                 urb->iso_frame_desc[i].length += sizeof(packet_length);
1575                 memcpy(urb->transfer_buffer + offset,
1576                        &packet_length, sizeof(packet_length));
1577                 copy_to_urb(subs, urb, offset + sizeof(packet_length),
1578                             stride, length);
1579         }
1580         /* Adjust transfer size accordingly. */
1581         bytes += urb->number_of_packets * sizeof(packet_length);
1582         return bytes;
1583 }
1584
1585 static void prepare_playback_urb(struct snd_usb_substream *subs,
1586                                  struct urb *urb)
1587 {
1588         struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1589         struct snd_usb_endpoint *ep = subs->data_endpoint;
1590         struct snd_urb_ctx *ctx = urb->context;
1591         unsigned int counts, frames, bytes;
1592         int i, stride, period_elapsed = 0;
1593         unsigned long flags;
1594
1595         stride = runtime->frame_bits >> 3;
1596
1597         frames = 0;
1598         urb->number_of_packets = 0;
1599         spin_lock_irqsave(&subs->lock, flags);
1600         subs->frame_limit += ep->max_urb_frames;
1601         for (i = 0; i < ctx->packets; i++) {
1602                 if (ctx->packet_size[i])
1603                         counts = ctx->packet_size[i];
1604                 else
1605                         counts = snd_usb_endpoint_next_packet_size(ep);
1606
1607                 /* set up descriptor */
1608                 urb->iso_frame_desc[i].offset = frames * ep->stride;
1609                 urb->iso_frame_desc[i].length = counts * ep->stride;
1610                 frames += counts;
1611                 urb->number_of_packets++;
1612                 subs->transfer_done += counts;
1613                 if (subs->transfer_done >= runtime->period_size) {
1614                         subs->transfer_done -= runtime->period_size;
1615                         subs->frame_limit = 0;
1616                         period_elapsed = 1;
1617                         if (subs->fmt_type == UAC_FORMAT_TYPE_II) {
1618                                 if (subs->transfer_done > 0) {
1619                                         /* FIXME: fill-max mode is not
1620                                          * supported yet */
1621                                         frames -= subs->transfer_done;
1622                                         counts -= subs->transfer_done;
1623                                         urb->iso_frame_desc[i].length =
1624                                                 counts * ep->stride;
1625                                         subs->transfer_done = 0;
1626                                 }
1627                                 i++;
1628                                 if (i < ctx->packets) {
1629                                         /* add a transfer delimiter */
1630                                         urb->iso_frame_desc[i].offset =
1631                                                 frames * ep->stride;
1632                                         urb->iso_frame_desc[i].length = 0;
1633                                         urb->number_of_packets++;
1634                                 }
1635                                 break;
1636                         }
1637                 }
1638                 /* finish at the period boundary or after enough frames */
1639                 if ((period_elapsed ||
1640                                 subs->transfer_done >= subs->frame_limit) &&
1641                     !snd_usb_endpoint_implicit_feedback_sink(ep))
1642                         break;
1643         }
1644         bytes = frames * ep->stride;
1645
1646         if (unlikely(subs->pcm_format == SNDRV_PCM_FORMAT_DSD_U16_LE &&
1647                      subs->cur_audiofmt->dsd_dop)) {
1648                 fill_playback_urb_dsd_dop(subs, urb, bytes);
1649         } else if (unlikely(subs->pcm_format == SNDRV_PCM_FORMAT_DSD_U8 &&
1650                            subs->cur_audiofmt->dsd_bitrev)) {
1651                 /* bit-reverse the bytes */
1652                 u8 *buf = urb->transfer_buffer;
1653                 for (i = 0; i < bytes; i++) {
1654                         int idx = (subs->hwptr_done + i)
1655                                 % (runtime->buffer_size * stride);
1656                         buf[i] = bitrev8(runtime->dma_area[idx]);
1657                 }
1658
1659                 subs->hwptr_done += bytes;
1660                 if (subs->hwptr_done >= runtime->buffer_size * stride)
1661                         subs->hwptr_done -= runtime->buffer_size * stride;
1662         } else {
1663                 /* usual PCM */
1664                 if (!subs->tx_length_quirk)
1665                         copy_to_urb(subs, urb, 0, stride, bytes);
1666                 else
1667                         bytes = copy_to_urb_quirk(subs, urb, stride, bytes);
1668                         /* bytes is now amount of outgoing data */
1669         }
1670
1671         /* update delay with exact number of samples queued */
1672         runtime->delay = subs->last_delay;
1673         runtime->delay += frames;
1674         subs->last_delay = runtime->delay;
1675
1676         /* realign last_frame_number */
1677         subs->last_frame_number = usb_get_current_frame_number(subs->dev);
1678         subs->last_frame_number &= 0xFF; /* keep 8 LSBs */
1679
1680         if (subs->trigger_tstamp_pending_update) {
1681                 /* this is the first actual URB submitted,
1682                  * update trigger timestamp to reflect actual start time
1683                  */
1684                 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1685                 subs->trigger_tstamp_pending_update = false;
1686         }
1687
1688         spin_unlock_irqrestore(&subs->lock, flags);
1689         urb->transfer_buffer_length = bytes;
1690         if (period_elapsed)
1691                 snd_pcm_period_elapsed(subs->pcm_substream);
1692 }
1693
1694 /*
1695  * process after playback data complete
1696  * - decrease the delay count again
1697  */
1698 static void retire_playback_urb(struct snd_usb_substream *subs,
1699                                struct urb *urb)
1700 {
1701         unsigned long flags;
1702         struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1703         struct snd_usb_endpoint *ep = subs->data_endpoint;
1704         int processed = urb->transfer_buffer_length / ep->stride;
1705         int est_delay;
1706
1707         /* ignore the delay accounting when procssed=0 is given, i.e.
1708          * silent payloads are procssed before handling the actual data
1709          */
1710         if (!processed)
1711                 return;
1712
1713         spin_lock_irqsave(&subs->lock, flags);
1714         if (!subs->last_delay)
1715                 goto out; /* short path */
1716
1717         est_delay = snd_usb_pcm_delay(subs, runtime->rate);
1718         /* update delay with exact number of samples played */
1719         if (processed > subs->last_delay)
1720                 subs->last_delay = 0;
1721         else
1722                 subs->last_delay -= processed;
1723         runtime->delay = subs->last_delay;
1724
1725         /*
1726          * Report when delay estimate is off by more than 2ms.
1727          * The error should be lower than 2ms since the estimate relies
1728          * on two reads of a counter updated every ms.
1729          */
1730         if (abs(est_delay - subs->last_delay) * 1000 > runtime->rate * 2)
1731                 dev_dbg_ratelimited(&subs->dev->dev,
1732                         "delay: estimated %d, actual %d\n",
1733                         est_delay, subs->last_delay);
1734
1735         if (!subs->running) {
1736                 /* update last_frame_number for delay counting here since
1737                  * prepare_playback_urb won't be called during pause
1738                  */
1739                 subs->last_frame_number =
1740                         usb_get_current_frame_number(subs->dev) & 0xff;
1741         }
1742
1743  out:
1744         spin_unlock_irqrestore(&subs->lock, flags);
1745 }
1746
1747 static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream,
1748                                               int cmd)
1749 {
1750         struct snd_usb_substream *subs = substream->runtime->private_data;
1751
1752         switch (cmd) {
1753         case SNDRV_PCM_TRIGGER_START:
1754                 subs->trigger_tstamp_pending_update = true;
1755                 /* fall through */
1756         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1757                 subs->data_endpoint->prepare_data_urb = prepare_playback_urb;
1758                 subs->data_endpoint->retire_data_urb = retire_playback_urb;
1759                 subs->running = 1;
1760                 return 0;
1761         case SNDRV_PCM_TRIGGER_STOP:
1762                 stop_endpoints(subs, false);
1763                 subs->running = 0;
1764                 return 0;
1765         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1766                 subs->data_endpoint->prepare_data_urb = NULL;
1767                 /* keep retire_data_urb for delay calculation */
1768                 subs->data_endpoint->retire_data_urb = retire_playback_urb;
1769                 subs->running = 0;
1770                 return 0;
1771         case SNDRV_PCM_TRIGGER_SUSPEND:
1772                 if (subs->stream->chip->setup_fmt_after_resume_quirk) {
1773                         stop_endpoints(subs, true);
1774                         subs->need_setup_fmt = true;
1775                         return 0;
1776                 }
1777                 break;
1778         }
1779
1780         return -EINVAL;
1781 }
1782
1783 static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream,
1784                                              int cmd)
1785 {
1786         int err;
1787         struct snd_usb_substream *subs = substream->runtime->private_data;
1788
1789         switch (cmd) {
1790         case SNDRV_PCM_TRIGGER_START:
1791                 err = start_endpoints(subs);
1792                 if (err < 0)
1793                         return err;
1794
1795                 subs->data_endpoint->retire_data_urb = retire_capture_urb;
1796                 subs->running = 1;
1797                 return 0;
1798         case SNDRV_PCM_TRIGGER_STOP:
1799                 stop_endpoints(subs, false);
1800                 subs->data_endpoint->retire_data_urb = NULL;
1801                 subs->running = 0;
1802                 return 0;
1803         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1804                 subs->data_endpoint->retire_data_urb = NULL;
1805                 subs->running = 0;
1806                 return 0;
1807         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1808                 subs->data_endpoint->retire_data_urb = retire_capture_urb;
1809                 subs->running = 1;
1810                 return 0;
1811         case SNDRV_PCM_TRIGGER_SUSPEND:
1812                 if (subs->stream->chip->setup_fmt_after_resume_quirk) {
1813                         stop_endpoints(subs, true);
1814                         subs->need_setup_fmt = true;
1815                         return 0;
1816                 }
1817                 break;
1818         }
1819
1820         return -EINVAL;
1821 }
1822
1823 static const struct snd_pcm_ops snd_usb_playback_ops = {
1824         .open =         snd_usb_pcm_open,
1825         .close =        snd_usb_pcm_close,
1826         .ioctl =        snd_pcm_lib_ioctl,
1827         .hw_params =    snd_usb_hw_params,
1828         .hw_free =      snd_usb_hw_free,
1829         .prepare =      snd_usb_pcm_prepare,
1830         .trigger =      snd_usb_substream_playback_trigger,
1831         .pointer =      snd_usb_pcm_pointer,
1832         .page =         snd_pcm_lib_get_vmalloc_page,
1833 };
1834
1835 static const struct snd_pcm_ops snd_usb_capture_ops = {
1836         .open =         snd_usb_pcm_open,
1837         .close =        snd_usb_pcm_close,
1838         .ioctl =        snd_pcm_lib_ioctl,
1839         .hw_params =    snd_usb_hw_params,
1840         .hw_free =      snd_usb_hw_free,
1841         .prepare =      snd_usb_pcm_prepare,
1842         .trigger =      snd_usb_substream_capture_trigger,
1843         .pointer =      snd_usb_pcm_pointer,
1844         .page =         snd_pcm_lib_get_vmalloc_page,
1845 };
1846
1847 static const struct snd_pcm_ops snd_usb_playback_dev_ops = {
1848         .open =         snd_usb_pcm_open,
1849         .close =        snd_usb_pcm_close,
1850         .ioctl =        snd_pcm_lib_ioctl,
1851         .hw_params =    snd_usb_hw_params,
1852         .hw_free =      snd_usb_hw_free,
1853         .prepare =      snd_usb_pcm_prepare,
1854         .trigger =      snd_usb_substream_playback_trigger,
1855         .pointer =      snd_usb_pcm_pointer,
1856         .page =         snd_pcm_sgbuf_ops_page,
1857 };
1858
1859 static const struct snd_pcm_ops snd_usb_capture_dev_ops = {
1860         .open =         snd_usb_pcm_open,
1861         .close =        snd_usb_pcm_close,
1862         .ioctl =        snd_pcm_lib_ioctl,
1863         .hw_params =    snd_usb_hw_params,
1864         .hw_free =      snd_usb_hw_free,
1865         .prepare =      snd_usb_pcm_prepare,
1866         .trigger =      snd_usb_substream_capture_trigger,
1867         .pointer =      snd_usb_pcm_pointer,
1868         .page =         snd_pcm_sgbuf_ops_page,
1869 };
1870
1871 void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream)
1872 {
1873         const struct snd_pcm_ops *ops;
1874
1875         if (snd_usb_use_vmalloc)
1876                 ops = stream == SNDRV_PCM_STREAM_PLAYBACK ?
1877                         &snd_usb_playback_ops : &snd_usb_capture_ops;
1878         else
1879                 ops = stream == SNDRV_PCM_STREAM_PLAYBACK ?
1880                         &snd_usb_playback_dev_ops : &snd_usb_capture_dev_ops;
1881         snd_pcm_set_ops(pcm, stream, ops);
1882 }
1883
1884 void snd_usb_preallocate_buffer(struct snd_usb_substream *subs)
1885 {
1886         struct snd_pcm *pcm = subs->stream->pcm;
1887         struct snd_pcm_substream *s = pcm->streams[subs->direction].substream;
1888         struct device *dev = subs->dev->bus->sysdev;
1889
1890         if (!snd_usb_use_vmalloc)
1891                 snd_pcm_lib_preallocate_pages(s, SNDRV_DMA_TYPE_DEV_SG,
1892                                               dev, 64*1024, 512*1024);
1893 }