sound/usb/format.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/usb.h>
   8 #include <linux/usb/audio.h>
   9 #include <linux/usb/audio-v2.h>
  10 #include <linux/usb/audio-v3.h>
  11
  12 #include <sound/core.h>
  13 #include <sound/pcm.h>
  14
  15 #include "usbaudio.h"
  16 #include "card.h"
  17 #include "quirks.h"
  18 #include "helper.h"
  19 #include "debug.h"
  20 #include "clock.h"
  21 #include "format.h"
  22
  23 /*
  24  * parse the audio format type I descriptor
  25  * and returns the corresponding pcm format
  26  *
  27  * @dev: usb device
  28  * @fp: audioformat record
  29  * @format: the format tag (wFormatTag)
  30  * @fmt: the format type descriptor (v1/v2) or AudioStreaming descriptor (v3)
  31  */
  32 static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
  33                                      struct audioformat *fp,
  34                                      u64 format, void *_fmt)
  35 {
  36         int sample_width, sample_bytes;
  37         u64 pcm_formats = 0;
  38
  39         switch (fp->protocol) {
  40         case UAC_VERSION_1:
  41         default: {
  42                 struct uac_format_type_i_discrete_descriptor *fmt = _fmt;
  43                 sample_width = fmt->bBitResolution;
  44                 sample_bytes = fmt->bSubframeSize;
  45                 format = 1ULL << format;
  46                 break;
  47         }
  48
  49         case UAC_VERSION_2: {
  50                 struct uac_format_type_i_ext_descriptor *fmt = _fmt;
  51                 sample_width = fmt->bBitResolution;
  52                 sample_bytes = fmt->bSubslotSize;
  53
  54                 if (format & UAC2_FORMAT_TYPE_I_RAW_DATA) {
  55                         pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
  56                         /* flag potentially raw DSD capable altsettings */
  57                         fp->dsd_raw = true;
  58                 }
  59
  60                 format <<= 1;
  61                 break;
  62         }
  63         case UAC_VERSION_3: {
  64                 struct uac3_as_header_descriptor *as = _fmt;
  65
  66                 sample_width = as->bBitResolution;
  67                 sample_bytes = as->bSubslotSize;
  68
  69                 if (format & UAC3_FORMAT_TYPE_I_RAW_DATA)
  70                         pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
  71
  72                 format <<= 1;
  73                 break;
  74         }
  75         }
  76
  77         fp->fmt_bits = sample_width;
  78
  79         if ((pcm_formats == 0) &&
  80             (format == 0 || format == (1 << UAC_FORMAT_TYPE_I_UNDEFINED))) {
  81                 /* some devices don't define this correctly... */
  82                 usb_audio_info(chip, "%u:%d : format type 0 is detected, processed as PCM\n",
  83                         fp->iface, fp->altsetting);
  84                 format = 1 << UAC_FORMAT_TYPE_I_PCM;
  85         }
  86         if (format & (1 << UAC_FORMAT_TYPE_I_PCM)) {
  87                 if (((chip->usb_id == USB_ID(0x0582, 0x0016)) ||
  88                      /* Edirol SD-90 */
  89                      (chip->usb_id == USB_ID(0x0582, 0x000c))) &&
  90                      /* Roland SC-D70 */
  91                     sample_width == 24 && sample_bytes == 2)
  92                         sample_bytes = 3;
  93                 else if (sample_width > sample_bytes * 8) {
  94                         usb_audio_info(chip, "%u:%d : sample bitwidth %d in over sample bytes %d\n",
  95                                  fp->iface, fp->altsetting,
  96                                  sample_width, sample_bytes);
  97                 }
  98                 /* check the format byte size */
  99                 switch (sample_bytes) {
 100                 case 1:
 101                         pcm_formats |= SNDRV_PCM_FMTBIT_S8;
 102                         break;
 103                 case 2:
 104                         if (snd_usb_is_big_endian_format(chip, fp))
 105                                 pcm_formats |= SNDRV_PCM_FMTBIT_S16_BE; /* grrr, big endian!! */
 106                         else
 107                                 pcm_formats |= SNDRV_PCM_FMTBIT_S16_LE;
 108                         break;
 109                 case 3:
 110                         if (snd_usb_is_big_endian_format(chip, fp))
 111                                 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3BE; /* grrr, big endian!! */
 112                         else
 113                                 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3LE;
 114                         break;
 115                 case 4:
 116                         pcm_formats |= SNDRV_PCM_FMTBIT_S32_LE;
 117                         break;
 118                 default:
 119                         usb_audio_info(chip,
 120                                  "%u:%d : unsupported sample bitwidth %d in %d bytes\n",
 121                                  fp->iface, fp->altsetting,
 122                                  sample_width, sample_bytes);
 123                         break;
 124                 }
 125         }
 126         if (format & (1 << UAC_FORMAT_TYPE_I_PCM8)) {
 127                 /* Dallas DS4201 workaround: it advertises U8 format, but really
 128                    supports S8. */
 129                 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
 130                         pcm_formats |= SNDRV_PCM_FMTBIT_S8;
 131                 else
 132                         pcm_formats |= SNDRV_PCM_FMTBIT_U8;
 133         }
 134         if (format & (1 << UAC_FORMAT_TYPE_I_IEEE_FLOAT)) {
 135                 pcm_formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
 136         }
 137         if (format & (1 << UAC_FORMAT_TYPE_I_ALAW)) {
 138                 pcm_formats |= SNDRV_PCM_FMTBIT_A_LAW;
 139         }
 140         if (format & (1 << UAC_FORMAT_TYPE_I_MULAW)) {
 141                 pcm_formats |= SNDRV_PCM_FMTBIT_MU_LAW;
 142         }
 143         if (format & ~0x3f) {
 144                 usb_audio_info(chip,
 145                          "%u:%d : unsupported format bits %#llx\n",
 146                          fp->iface, fp->altsetting, format);
 147         }
 148
 149         pcm_formats |= snd_usb_interface_dsd_format_quirks(chip, fp, sample_bytes);
 150
 151         return pcm_formats;
 152 }
 153
 154 static int set_fixed_rate(struct audioformat *fp, int rate, int rate_bits)
 155 {
 156         kfree(fp->rate_table);
 157         fp->rate_table = kmalloc(sizeof(int), GFP_KERNEL);
 158         if (!fp->rate_table)
 159                 return -ENOMEM;
 160         fp->nr_rates = 1;
 161         fp->rate_min = rate;
 162         fp->rate_max = rate;
 163         fp->rates = rate_bits;
 164         fp->rate_table[0] = rate;
 165         return 0;
 166 }
 167
 168 /*
 169  * parse the format descriptor and stores the possible sample rates
 170  * on the audioformat table (audio class v1).
 171  *
 172  * @dev: usb device
 173  * @fp: audioformat record
 174  * @fmt: the format descriptor
 175  * @offset: the start offset of descriptor pointing the rate type
 176  *          (7 for type I and II, 8 for type II)
 177  */
 178 static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audioformat *fp,
 179                                        unsigned char *fmt, int offset)
 180 {
 181         int nr_rates = fmt[offset];
 182
 183         if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
 184                 usb_audio_err(chip,
 185                         "%u:%d : invalid UAC_FORMAT_TYPE desc\n",
 186                         fp->iface, fp->altsetting);
 187                 return -EINVAL;
 188         }
 189
 190         if (nr_rates) {
 191                 /*
 192                  * build the rate table and bitmap flags
 193                  */
 194                 int r, idx;
 195
 196                 fp->rate_table = kmalloc_array(nr_rates, sizeof(int),
 197                                                GFP_KERNEL);
 198                 if (fp->rate_table == NULL)
 199                         return -ENOMEM;
 200
 201                 fp->nr_rates = 0;
 202                 fp->rate_min = fp->rate_max = 0;
 203                 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
 204                         unsigned int rate = combine_triple(&fmt[idx]);
 205                         if (!rate)
 206                                 continue;
 207                         /* C-Media CM6501 mislabels its 96 kHz altsetting */
 208                         /* Terratec Aureon 7.1 USB C-Media 6206, too */
 209                         if (rate == 48000 && nr_rates == 1 &&
 210                             (chip->usb_id == USB_ID(0x0d8c, 0x0201) ||
 211                              chip->usb_id == USB_ID(0x0d8c, 0x0102) ||
 212                              chip->usb_id == USB_ID(0x0ccd, 0x00b1)) &&
 213                             fp->altsetting == 5 && fp->maxpacksize == 392)
 214                                 rate = 96000;
 215                         /* Creative VF0420/VF0470 Live Cams report 16 kHz instead of 8kHz */
 216                         if (rate == 16000 &&
 217                             (chip->usb_id == USB_ID(0x041e, 0x4064) ||
 218                              chip->usb_id == USB_ID(0x041e, 0x4068)))
 219                                 rate = 8000;
 220
 221                         fp->rate_table[fp->nr_rates] = rate;
 222                         if (!fp->rate_min || rate < fp->rate_min)
 223                                 fp->rate_min = rate;
 224                         if (!fp->rate_max || rate > fp->rate_max)
 225                                 fp->rate_max = rate;
 226                         fp->rates |= snd_pcm_rate_to_rate_bit(rate);
 227                         fp->nr_rates++;
 228                 }
 229                 if (!fp->nr_rates) {
 230                         hwc_debug("All rates were zero. Skipping format!\n");
 231                         return -EINVAL;
 232                 }
 233         } else {
 234                 /* continuous rates */
 235                 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
 236                 fp->rate_min = combine_triple(&fmt[offset + 1]);
 237                 fp->rate_max = combine_triple(&fmt[offset + 4]);
 238         }
 239
 240         /* Jabra Evolve 65 headset */
 241         if (chip->usb_id == USB_ID(0x0b0e, 0x030b)) {
 242                 /* only 48kHz for playback while keeping 16kHz for capture */
 243                 if (fp->nr_rates != 1)
 244                         return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
 245         }
 246
 247         return 0;
 248 }
 249
 250 /*
 251  * Helper function to walk the array of sample rate triplets reported by
 252  * the device. The problem is that we need to parse whole array first to
 253  * get to know how many sample rates we have to expect.
 254  * Then fp->rate_table can be allocated and filled.
 255  */
 256 static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip,
 257                                         struct audioformat *fp, int nr_triplets,
 258                                         const unsigned char *data)
 259 {
 260         int i, nr_rates = 0;
 261
 262         fp->rates = fp->rate_min = fp->rate_max = 0;
 263
 264         for (i = 0; i < nr_triplets; i++) {
 265                 int min = combine_quad(&data[2 + 12 * i]);
 266                 int max = combine_quad(&data[6 + 12 * i]);
 267                 int res = combine_quad(&data[10 + 12 * i]);
 268                 unsigned int rate;
 269
 270                 if ((max < 0) || (min < 0) || (res < 0) || (max < min))
 271                         continue;
 272
 273                 /*
 274                  * for ranges with res == 1, we announce a continuous sample
 275                  * rate range, and this function should return 0 for no further
 276                  * parsing.
 277                  */
 278                 if (res == 1) {
 279                         fp->rate_min = min;
 280                         fp->rate_max = max;
 281                         fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
 282                         return 0;
 283                 }
 284
 285                 for (rate = min; rate <= max; rate += res) {
 286                         if (fp->rate_table)
 287                                 fp->rate_table[nr_rates] = rate;
 288                         if (!fp->rate_min || rate < fp->rate_min)
 289                                 fp->rate_min = rate;
 290                         if (!fp->rate_max || rate > fp->rate_max)
 291                                 fp->rate_max = rate;
 292                         fp->rates |= snd_pcm_rate_to_rate_bit(rate);
 293
 294                         nr_rates++;
 295                         if (nr_rates >= MAX_NR_RATES) {
 296                                 usb_audio_err(chip, "invalid uac2 rates\n");
 297                                 break;
 298                         }
 299
 300                         /* avoid endless loop */
 301                         if (res == 0)
 302                                 break;
 303                 }
 304         }
 305
 306         return nr_rates;
 307 }
 308
 309 /* Line6 Helix series don't support the UAC2_CS_RANGE usb function
 310  * call. Return a static table of known clock rates.
 311  */
 312 static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip,
 313                                                 struct audioformat *fp)
 314 {
 315         switch (chip->usb_id) {
 316         case USB_ID(0x0e41, 0x4241): /* Line6 Helix */
 317         case USB_ID(0x0e41, 0x4242): /* Line6 Helix Rack */
 318         case USB_ID(0x0e41, 0x4244): /* Line6 Helix LT */
 319         case USB_ID(0x0e41, 0x4246): /* Line6 HX-Stomp */
 320         case USB_ID(0x0e41, 0x4248): /* Line6 Helix >= fw 2.82 */
 321         case USB_ID(0x0e41, 0x4249): /* Line6 Helix Rack >= fw 2.82 */
 322         case USB_ID(0x0e41, 0x424a): /* Line6 Helix LT >= fw 2.82 */
 323                 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
 324         }
 325
 326         return -ENODEV;
 327 }
 328
 329 /*
 330  * parse the format descriptor and stores the possible sample rates
 331  * on the audioformat table (audio class v2 and v3).
 332  */
 333 static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip,
 334                                        struct audioformat *fp)
 335 {
 336         struct usb_device *dev = chip->dev;
 337         unsigned char tmp[2], *data;
 338         int nr_triplets, data_size, ret = 0, ret_l6;
 339         int clock = snd_usb_clock_find_source(chip, fp, false);
 340
 341         if (clock < 0) {
 342                 dev_err(&dev->dev,
 343                         "%s(): unable to find clock source (clock %d)\n",
 344                                 __func__, clock);
 345                 goto err;
 346         }
 347
 348         /* get the number of sample rates first by only fetching 2 bytes */
 349         ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
 350                               USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
 351                               UAC2_CS_CONTROL_SAM_FREQ << 8,
 352                               snd_usb_ctrl_intf(chip) | (clock << 8),
 353                               tmp, sizeof(tmp));
 354
 355         if (ret < 0) {
 356                 /* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */
 357                 ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp);
 358                 if (ret_l6 == -ENODEV) {
 359                         /* no line6 device found continue showing the error */
 360                         dev_err(&dev->dev,
 361                                 "%s(): unable to retrieve number of sample rates (clock %d)\n",
 362                                 __func__, clock);
 363                         goto err;
 364                 }
 365                 if (ret_l6 == 0) {
 366                         dev_info(&dev->dev,
 367                                 "%s(): unable to retrieve number of sample rates: set it to a predefined value (clock %d).\n",
 368                                 __func__, clock);
 369                         return 0;
 370                 }
 371                 ret = ret_l6;
 372                 goto err;
 373         }
 374
 375         nr_triplets = (tmp[1] << 8) | tmp[0];
 376         data_size = 2 + 12 * nr_triplets;
 377         data = kzalloc(data_size, GFP_KERNEL);
 378         if (!data) {
 379                 ret = -ENOMEM;
 380                 goto err;
 381         }
 382
 383         /* now get the full information */
 384         ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
 385                               USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
 386                               UAC2_CS_CONTROL_SAM_FREQ << 8,
 387                               snd_usb_ctrl_intf(chip) | (clock << 8),
 388                               data, data_size);
 389
 390         if (ret < 0) {
 391                 dev_err(&dev->dev,
 392                         "%s(): unable to retrieve sample rate range (clock %d)\n",
 393                                 __func__, clock);
 394                 ret = -EINVAL;
 395                 goto err_free;
 396         }
 397
 398         /* Call the triplet parser, and make sure fp->rate_table is NULL.
 399          * We just use the return value to know how many sample rates we
 400          * will have to deal with. */
 401         kfree(fp->rate_table);
 402         fp->rate_table = NULL;
 403         fp->nr_rates = parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
 404
 405         if (fp->nr_rates == 0) {
 406                 /* SNDRV_PCM_RATE_CONTINUOUS */
 407                 ret = 0;
 408                 goto err_free;
 409         }
 410
 411         fp->rate_table = kmalloc_array(fp->nr_rates, sizeof(int), GFP_KERNEL);
 412         if (!fp->rate_table) {
 413                 ret = -ENOMEM;
 414                 goto err_free;
 415         }
 416
 417         /* Call the triplet parser again, but this time, fp->rate_table is
 418          * allocated, so the rates will be stored */
 419         parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
 420
 421 err_free:
 422         kfree(data);
 423 err:
 424         return ret;
 425 }
 426
 427 /*
 428  * parse the format type I and III descriptors
 429  */
 430 static int parse_audio_format_i(struct snd_usb_audio *chip,
 431                                 struct audioformat *fp, u64 format,
 432                                 void *_fmt)
 433 {
 434         snd_pcm_format_t pcm_format;
 435         unsigned int fmt_type;
 436         int ret;
 437
 438         switch (fp->protocol) {
 439         default:
 440         case UAC_VERSION_1:
 441         case UAC_VERSION_2: {
 442                 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
 443
 444                 fmt_type = fmt->bFormatType;
 445                 break;
 446         }
 447         case UAC_VERSION_3: {
 448                 /* fp->fmt_type is already set in this case */
 449                 fmt_type = fp->fmt_type;
 450                 break;
 451         }
 452         }
 453
 454         if (fmt_type == UAC_FORMAT_TYPE_III) {
 455                 /* FIXME: the format type is really IECxxx
 456                  *        but we give normal PCM format to get the existing
 457                  *        apps working...
 458                  */
 459                 switch (chip->usb_id) {
 460
 461                 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
 462                         if (chip->setup == 0x00 &&
 463                             fp->altsetting == 6)
 464                                 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
 465                         else
 466                                 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
 467                         break;
 468                 default:
 469                         pcm_format = SNDRV_PCM_FORMAT_S16_LE;
 470                 }
 471                 fp->formats = pcm_format_to_bits(pcm_format);
 472         } else {
 473                 fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt);
 474                 if (!fp->formats)
 475                         return -EINVAL;
 476         }
 477
 478         /* gather possible sample rates */
 479         /* audio class v1 reports possible sample rates as part of the
 480          * proprietary class specific descriptor.
 481          * audio class v2 uses class specific EP0 range requests for that.
 482          */
 483         switch (fp->protocol) {
 484         default:
 485         case UAC_VERSION_1: {
 486                 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
 487
 488                 fp->channels = fmt->bNrChannels;
 489                 ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
 490                 break;
 491         }
 492         case UAC_VERSION_2:
 493         case UAC_VERSION_3: {
 494                 /* fp->channels is already set in this case */
 495                 ret = parse_audio_format_rates_v2v3(chip, fp);
 496                 break;
 497         }
 498         }
 499
 500         if (fp->channels < 1) {
 501                 usb_audio_err(chip,
 502                         "%u:%d : invalid channels %d\n",
 503                         fp->iface, fp->altsetting, fp->channels);
 504                 return -EINVAL;
 505         }
 506
 507         return ret;
 508 }
 509
 510 /*
 511  * parse the format type II descriptor
 512  */
 513 static int parse_audio_format_ii(struct snd_usb_audio *chip,
 514                                  struct audioformat *fp,
 515                                  u64 format, void *_fmt)
 516 {
 517         int brate, framesize, ret;
 518
 519         switch (format) {
 520         case UAC_FORMAT_TYPE_II_AC3:
 521                 /* FIXME: there is no AC3 format defined yet */
 522                 // fp->formats = SNDRV_PCM_FMTBIT_AC3;
 523                 fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */
 524                 break;
 525         case UAC_FORMAT_TYPE_II_MPEG:
 526                 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
 527                 break;
 528         default:
 529                 usb_audio_info(chip,
 530                          "%u:%d : unknown format tag %#llx is detected.  processed as MPEG.\n",
 531                          fp->iface, fp->altsetting, format);
 532                 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
 533                 break;
 534         }
 535
 536         fp->channels = 1;
 537
 538         switch (fp->protocol) {
 539         default:
 540         case UAC_VERSION_1: {
 541                 struct uac_format_type_ii_discrete_descriptor *fmt = _fmt;
 542                 brate = le16_to_cpu(fmt->wMaxBitRate);
 543                 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
 544                 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
 545                 fp->frame_size = framesize;
 546                 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */
 547                 break;
 548         }
 549         case UAC_VERSION_2: {
 550                 struct uac_format_type_ii_ext_descriptor *fmt = _fmt;
 551                 brate = le16_to_cpu(fmt->wMaxBitRate);
 552                 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
 553                 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
 554                 fp->frame_size = framesize;
 555                 ret = parse_audio_format_rates_v2v3(chip, fp);
 556                 break;
 557         }
 558         }
 559
 560         return ret;
 561 }
 562
 563 int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
 564                                struct audioformat *fp, u64 format,
 565                                struct uac_format_type_i_continuous_descriptor *fmt,
 566                                int stream)
 567 {
 568         int err;
 569
 570         switch (fmt->bFormatType) {
 571         case UAC_FORMAT_TYPE_I:
 572         case UAC_FORMAT_TYPE_III:
 573                 err = parse_audio_format_i(chip, fp, format, fmt);
 574                 break;
 575         case UAC_FORMAT_TYPE_II:
 576                 err = parse_audio_format_ii(chip, fp, format, fmt);
 577                 break;
 578         default:
 579                 usb_audio_info(chip,
 580                          "%u:%d : format type %d is not supported yet\n",
 581                          fp->iface, fp->altsetting,
 582                          fmt->bFormatType);
 583                 return -ENOTSUPP;
 584         }
 585         fp->fmt_type = fmt->bFormatType;
 586         if (err < 0)
 587                 return err;
 588 #if 1
 589         /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
 590         /* extigy apparently supports sample rates other than 48k
 591          * but not in ordinary way.  so we enable only 48k atm.
 592          */
 593         if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
 594             chip->usb_id == USB_ID(0x041e, 0x3020) ||
 595             chip->usb_id == USB_ID(0x041e, 0x3061)) {
 596                 if (fmt->bFormatType == UAC_FORMAT_TYPE_I &&
 597                     fp->rates != SNDRV_PCM_RATE_48000 &&
 598                     fp->rates != SNDRV_PCM_RATE_96000)
 599                         return -ENOTSUPP;
 600         }
 601 #endif
 602         return 0;
 603 }
 604
 605 int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
 606                                struct audioformat *fp,
 607                                struct uac3_as_header_descriptor *as,
 608                                int stream)
 609 {
 610         u64 format = le64_to_cpu(as->bmFormats);
 611         int err;
 612
 613         /*
 614          * Type I format bits are D0..D6
 615          * This test works because type IV is not supported
 616          */
 617         if (format & 0x7f)
 618                 fp->fmt_type = UAC_FORMAT_TYPE_I;
 619         else
 620                 fp->fmt_type = UAC_FORMAT_TYPE_III;
 621
 622         err = parse_audio_format_i(chip, fp, format, as);
 623         if (err < 0)
 624                 return err;
 625
 626         return 0;
 627 }