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 /*
 252  * Presonus Studio 1810c supports a limited set of sampling
 253  * rates per altsetting but reports the full set each time.
 254  * If we don't filter out the unsupported rates and attempt
 255  * to configure the card, it will hang refusing to do any
 256  * further audio I/O until a hard reset is performed.
 257  *
 258  * The list of supported rates per altsetting (set of available
 259  * I/O channels) is described in the owner's manual, section 2.2.
 260  */
 261 static bool s1810c_valid_sample_rate(struct audioformat *fp,
 262                                      unsigned int rate)
 263 {
 264         switch (fp->altsetting) {
 265         case 1:
 266                 /* All ADAT ports available */
 267                 return rate <= 48000;
 268         case 2:
 269                 /* Half of ADAT ports available */
 270                 return (rate == 88200 || rate == 96000);
 271         case 3:
 272                 /* Analog I/O only (no S/PDIF nor ADAT) */
 273                 return rate >= 176400;
 274         default:
 275                 return false;
 276         }
 277         return false;
 278 }
 279
 280 /*
 281  * Helper function to walk the array of sample rate triplets reported by
 282  * the device. The problem is that we need to parse whole array first to
 283  * get to know how many sample rates we have to expect.
 284  * Then fp->rate_table can be allocated and filled.
 285  */
 286 static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip,
 287                                         struct audioformat *fp, int nr_triplets,
 288                                         const unsigned char *data)
 289 {
 290         int i, nr_rates = 0;
 291
 292         fp->rates = fp->rate_min = fp->rate_max = 0;
 293
 294         for (i = 0; i < nr_triplets; i++) {
 295                 int min = combine_quad(&data[2 + 12 * i]);
 296                 int max = combine_quad(&data[6 + 12 * i]);
 297                 int res = combine_quad(&data[10 + 12 * i]);
 298                 unsigned int rate;
 299
 300                 if ((max < 0) || (min < 0) || (res < 0) || (max < min))
 301                         continue;
 302
 303                 /*
 304                  * for ranges with res == 1, we announce a continuous sample
 305                  * rate range, and this function should return 0 for no further
 306                  * parsing.
 307                  */
 308                 if (res == 1) {
 309                         fp->rate_min = min;
 310                         fp->rate_max = max;
 311                         fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
 312                         return 0;
 313                 }
 314
 315                 for (rate = min; rate <= max; rate += res) {
 316
 317                         /* Filter out invalid rates on Presonus Studio 1810c */
 318                         if (chip->usb_id == USB_ID(0x0194f, 0x010c) &&
 319                             !s1810c_valid_sample_rate(fp, rate))
 320                                 goto skip_rate;
 321
 322                         if (fp->rate_table)
 323                                 fp->rate_table[nr_rates] = rate;
 324                         if (!fp->rate_min || rate < fp->rate_min)
 325                                 fp->rate_min = rate;
 326                         if (!fp->rate_max || rate > fp->rate_max)
 327                                 fp->rate_max = rate;
 328                         fp->rates |= snd_pcm_rate_to_rate_bit(rate);
 329
 330                         nr_rates++;
 331                         if (nr_rates >= MAX_NR_RATES) {
 332                                 usb_audio_err(chip, "invalid uac2 rates\n");
 333                                 break;
 334                         }
 335
 336 skip_rate:
 337                         /* avoid endless loop */
 338                         if (res == 0)
 339                                 break;
 340                 }
 341         }
 342
 343         return nr_rates;
 344 }
 345
 346 /* Line6 Helix series don't support the UAC2_CS_RANGE usb function
 347  * call. Return a static table of known clock rates.
 348  */
 349 static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip,
 350                                                 struct audioformat *fp)
 351 {
 352         switch (chip->usb_id) {
 353         case USB_ID(0x0e41, 0x4241): /* Line6 Helix */
 354         case USB_ID(0x0e41, 0x4242): /* Line6 Helix Rack */
 355         case USB_ID(0x0e41, 0x4244): /* Line6 Helix LT */
 356         case USB_ID(0x0e41, 0x4246): /* Line6 HX-Stomp */
 357         case USB_ID(0x0e41, 0x4248): /* Line6 Helix >= fw 2.82 */
 358         case USB_ID(0x0e41, 0x4249): /* Line6 Helix Rack >= fw 2.82 */
 359         case USB_ID(0x0e41, 0x424a): /* Line6 Helix LT >= fw 2.82 */
 360                 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
 361         }
 362
 363         return -ENODEV;
 364 }
 365
 366 /*
 367  * parse the format descriptor and stores the possible sample rates
 368  * on the audioformat table (audio class v2 and v3).
 369  */
 370 static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip,
 371                                        struct audioformat *fp)
 372 {
 373         struct usb_device *dev = chip->dev;
 374         unsigned char tmp[2], *data;
 375         int nr_triplets, data_size, ret = 0, ret_l6;
 376         int clock = snd_usb_clock_find_source(chip, fp, false);
 377
 378         if (clock < 0) {
 379                 dev_err(&dev->dev,
 380                         "%s(): unable to find clock source (clock %d)\n",
 381                                 __func__, clock);
 382                 goto err;
 383         }
 384
 385         /* get the number of sample rates first by only fetching 2 bytes */
 386         ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
 387                               USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
 388                               UAC2_CS_CONTROL_SAM_FREQ << 8,
 389                               snd_usb_ctrl_intf(chip) | (clock << 8),
 390                               tmp, sizeof(tmp));
 391
 392         if (ret < 0) {
 393                 /* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */
 394                 ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp);
 395                 if (ret_l6 == -ENODEV) {
 396                         /* no line6 device found continue showing the error */
 397                         dev_err(&dev->dev,
 398                                 "%s(): unable to retrieve number of sample rates (clock %d)\n",
 399                                 __func__, clock);
 400                         goto err;
 401                 }
 402                 if (ret_l6 == 0) {
 403                         dev_info(&dev->dev,
 404                                 "%s(): unable to retrieve number of sample rates: set it to a predefined value (clock %d).\n",
 405                                 __func__, clock);
 406                         return 0;
 407                 }
 408                 ret = ret_l6;
 409                 goto err;
 410         }
 411
 412         nr_triplets = (tmp[1] << 8) | tmp[0];
 413         data_size = 2 + 12 * nr_triplets;
 414         data = kzalloc(data_size, GFP_KERNEL);
 415         if (!data) {
 416                 ret = -ENOMEM;
 417                 goto err;
 418         }
 419
 420         /* now get the full information */
 421         ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
 422                               USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
 423                               UAC2_CS_CONTROL_SAM_FREQ << 8,
 424                               snd_usb_ctrl_intf(chip) | (clock << 8),
 425                               data, data_size);
 426
 427         if (ret < 0) {
 428                 dev_err(&dev->dev,
 429                         "%s(): unable to retrieve sample rate range (clock %d)\n",
 430                                 __func__, clock);
 431                 ret = -EINVAL;
 432                 goto err_free;
 433         }
 434
 435         /* Call the triplet parser, and make sure fp->rate_table is NULL.
 436          * We just use the return value to know how many sample rates we
 437          * will have to deal with. */
 438         kfree(fp->rate_table);
 439         fp->rate_table = NULL;
 440         fp->nr_rates = parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
 441
 442         if (fp->nr_rates == 0) {
 443                 /* SNDRV_PCM_RATE_CONTINUOUS */
 444                 ret = 0;
 445                 goto err_free;
 446         }
 447
 448         fp->rate_table = kmalloc_array(fp->nr_rates, sizeof(int), GFP_KERNEL);
 449         if (!fp->rate_table) {
 450                 ret = -ENOMEM;
 451                 goto err_free;
 452         }
 453
 454         /* Call the triplet parser again, but this time, fp->rate_table is
 455          * allocated, so the rates will be stored */
 456         parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
 457
 458 err_free:
 459         kfree(data);
 460 err:
 461         return ret;
 462 }
 463
 464 /*
 465  * parse the format type I and III descriptors
 466  */
 467 static int parse_audio_format_i(struct snd_usb_audio *chip,
 468                                 struct audioformat *fp, u64 format,
 469                                 void *_fmt)
 470 {
 471         snd_pcm_format_t pcm_format;
 472         unsigned int fmt_type;
 473         int ret;
 474
 475         switch (fp->protocol) {
 476         default:
 477         case UAC_VERSION_1:
 478         case UAC_VERSION_2: {
 479                 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
 480
 481                 fmt_type = fmt->bFormatType;
 482                 break;
 483         }
 484         case UAC_VERSION_3: {
 485                 /* fp->fmt_type is already set in this case */
 486                 fmt_type = fp->fmt_type;
 487                 break;
 488         }
 489         }
 490
 491         if (fmt_type == UAC_FORMAT_TYPE_III) {
 492                 /* FIXME: the format type is really IECxxx
 493                  *        but we give normal PCM format to get the existing
 494                  *        apps working...
 495                  */
 496                 switch (chip->usb_id) {
 497
 498                 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
 499                         if (chip->setup == 0x00 &&
 500                             fp->altsetting == 6)
 501                                 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
 502                         else
 503                                 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
 504                         break;
 505                 default:
 506                         pcm_format = SNDRV_PCM_FORMAT_S16_LE;
 507                 }
 508                 fp->formats = pcm_format_to_bits(pcm_format);
 509         } else {
 510                 fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt);
 511                 if (!fp->formats)
 512                         return -EINVAL;
 513         }
 514
 515         /* gather possible sample rates */
 516         /* audio class v1 reports possible sample rates as part of the
 517          * proprietary class specific descriptor.
 518          * audio class v2 uses class specific EP0 range requests for that.
 519          */
 520         switch (fp->protocol) {
 521         default:
 522         case UAC_VERSION_1: {
 523                 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
 524
 525                 fp->channels = fmt->bNrChannels;
 526                 ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
 527                 break;
 528         }
 529         case UAC_VERSION_2:
 530         case UAC_VERSION_3: {
 531                 /* fp->channels is already set in this case */
 532                 ret = parse_audio_format_rates_v2v3(chip, fp);
 533                 break;
 534         }
 535         }
 536
 537         if (fp->channels < 1) {
 538                 usb_audio_err(chip,
 539                         "%u:%d : invalid channels %d\n",
 540                         fp->iface, fp->altsetting, fp->channels);
 541                 return -EINVAL;
 542         }
 543
 544         return ret;
 545 }
 546
 547 /*
 548  * parse the format type II descriptor
 549  */
 550 static int parse_audio_format_ii(struct snd_usb_audio *chip,
 551                                  struct audioformat *fp,
 552                                  u64 format, void *_fmt)
 553 {
 554         int brate, framesize, ret;
 555
 556         switch (format) {
 557         case UAC_FORMAT_TYPE_II_AC3:
 558                 /* FIXME: there is no AC3 format defined yet */
 559                 // fp->formats = SNDRV_PCM_FMTBIT_AC3;
 560                 fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */
 561                 break;
 562         case UAC_FORMAT_TYPE_II_MPEG:
 563                 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
 564                 break;
 565         default:
 566                 usb_audio_info(chip,
 567                          "%u:%d : unknown format tag %#llx is detected.  processed as MPEG.\n",
 568                          fp->iface, fp->altsetting, format);
 569                 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
 570                 break;
 571         }
 572
 573         fp->channels = 1;
 574
 575         switch (fp->protocol) {
 576         default:
 577         case UAC_VERSION_1: {
 578                 struct uac_format_type_ii_discrete_descriptor *fmt = _fmt;
 579                 brate = le16_to_cpu(fmt->wMaxBitRate);
 580                 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
 581                 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
 582                 fp->frame_size = framesize;
 583                 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */
 584                 break;
 585         }
 586         case UAC_VERSION_2: {
 587                 struct uac_format_type_ii_ext_descriptor *fmt = _fmt;
 588                 brate = le16_to_cpu(fmt->wMaxBitRate);
 589                 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
 590                 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
 591                 fp->frame_size = framesize;
 592                 ret = parse_audio_format_rates_v2v3(chip, fp);
 593                 break;
 594         }
 595         }
 596
 597         return ret;
 598 }
 599
 600 int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
 601                                struct audioformat *fp, u64 format,
 602                                struct uac_format_type_i_continuous_descriptor *fmt,
 603                                int stream)
 604 {
 605         int err;
 606
 607         switch (fmt->bFormatType) {
 608         case UAC_FORMAT_TYPE_I:
 609         case UAC_FORMAT_TYPE_III:
 610                 err = parse_audio_format_i(chip, fp, format, fmt);
 611                 break;
 612         case UAC_FORMAT_TYPE_II:
 613                 err = parse_audio_format_ii(chip, fp, format, fmt);
 614                 break;
 615         default:
 616                 usb_audio_info(chip,
 617                          "%u:%d : format type %d is not supported yet\n",
 618                          fp->iface, fp->altsetting,
 619                          fmt->bFormatType);
 620                 return -ENOTSUPP;
 621         }
 622         fp->fmt_type = fmt->bFormatType;
 623         if (err < 0)
 624                 return err;
 625 #if 1
 626         /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
 627         /* extigy apparently supports sample rates other than 48k
 628          * but not in ordinary way.  so we enable only 48k atm.
 629          */
 630         if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
 631             chip->usb_id == USB_ID(0x041e, 0x3020) ||
 632             chip->usb_id == USB_ID(0x041e, 0x3061)) {
 633                 if (fmt->bFormatType == UAC_FORMAT_TYPE_I &&
 634                     fp->rates != SNDRV_PCM_RATE_48000 &&
 635                     fp->rates != SNDRV_PCM_RATE_96000)
 636                         return -ENOTSUPP;
 637         }
 638 #endif
 639         return 0;
 640 }
 641
 642 int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
 643                                struct audioformat *fp,
 644                                struct uac3_as_header_descriptor *as,
 645                                int stream)
 646 {
 647         u64 format = le64_to_cpu(as->bmFormats);
 648         int err;
 649
 650         /*
 651          * Type I format bits are D0..D6
 652          * This test works because type IV is not supported
 653          */
 654         if (format & 0x7f)
 655                 fp->fmt_type = UAC_FORMAT_TYPE_I;
 656         else
 657                 fp->fmt_type = UAC_FORMAT_TYPE_III;
 658
 659         err = parse_audio_format_i(chip, fp, format, as);
 660         if (err < 0)
 661                 return err;
 662
 663         return 0;
 664 }