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 "clock.h"
  20 #include "format.h"
  21
  22 /*
  23  * parse the audio format type I descriptor
  24  * and returns the corresponding pcm format
  25  *
  26  * @dev: usb device
  27  * @fp: audioformat record
  28  * @format: the format tag (wFormatTag)
  29  * @fmt: the format type descriptor (v1/v2) or AudioStreaming descriptor (v3)
  30  */
  31 static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
  32                                      struct audioformat *fp,
  33                                      u64 format, void *_fmt)
  34 {
  35         int sample_width, sample_bytes;
  36         u64 pcm_formats = 0;
  37
  38         switch (fp->protocol) {
  39         case UAC_VERSION_1:
  40         default: {
  41                 struct uac_format_type_i_discrete_descriptor *fmt = _fmt;
  42                 if (format >= 64)
  43                         return 0; /* invalid format */
  44                 sample_width = fmt->bBitResolution;
  45                 sample_bytes = fmt->bSubframeSize;
  46                 format = 1ULL << format;
  47                 break;
  48         }
  49
  50         case UAC_VERSION_2: {
  51                 struct uac_format_type_i_ext_descriptor *fmt = _fmt;
  52                 sample_width = fmt->bBitResolution;
  53                 sample_bytes = fmt->bSubslotSize;
  54
  55                 if (format & UAC2_FORMAT_TYPE_I_RAW_DATA) {
  56                         pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
  57                         /* flag potentially raw DSD capable altsettings */
  58                         fp->dsd_raw = true;
  59                 }
  60
  61                 format <<= 1;
  62                 break;
  63         }
  64         case UAC_VERSION_3: {
  65                 struct uac3_as_header_descriptor *as = _fmt;
  66
  67                 sample_width = as->bBitResolution;
  68                 sample_bytes = as->bSubslotSize;
  69
  70                 if (format & UAC3_FORMAT_TYPE_I_RAW_DATA)
  71                         pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
  72
  73                 format <<= 1;
  74                 break;
  75         }
  76         }
  77
  78         fp->fmt_bits = sample_width;
  79
  80         if ((pcm_formats == 0) &&
  81             (format == 0 || format == (1 << UAC_FORMAT_TYPE_I_UNDEFINED))) {
  82                 /* some devices don't define this correctly... */
  83                 usb_audio_info(chip, "%u:%d : format type 0 is detected, processed as PCM\n",
  84                         fp->iface, fp->altsetting);
  85                 format = 1 << UAC_FORMAT_TYPE_I_PCM;
  86         }
  87         if (format & (1 << UAC_FORMAT_TYPE_I_PCM)) {
  88                 if (((chip->usb_id == USB_ID(0x0582, 0x0016)) ||
  89                      /* Edirol SD-90 */
  90                      (chip->usb_id == USB_ID(0x0582, 0x000c))) &&
  91                      /* Roland SC-D70 */
  92                     sample_width == 24 && sample_bytes == 2)
  93                         sample_bytes = 3;
  94                 else if (sample_width > sample_bytes * 8) {
  95                         usb_audio_info(chip, "%u:%d : sample bitwidth %d in over sample bytes %d\n",
  96                                  fp->iface, fp->altsetting,
  97                                  sample_width, sample_bytes);
  98                 }
  99                 /* check the format byte size */
 100                 switch (sample_bytes) {
 101                 case 1:
 102                         pcm_formats |= SNDRV_PCM_FMTBIT_S8;
 103                         break;
 104                 case 2:
 105                         if (snd_usb_is_big_endian_format(chip, fp))
 106                                 pcm_formats |= SNDRV_PCM_FMTBIT_S16_BE; /* grrr, big endian!! */
 107                         else
 108                                 pcm_formats |= SNDRV_PCM_FMTBIT_S16_LE;
 109                         break;
 110                 case 3:
 111                         if (snd_usb_is_big_endian_format(chip, fp))
 112                                 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3BE; /* grrr, big endian!! */
 113                         else
 114                                 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3LE;
 115                         break;
 116                 case 4:
 117                         pcm_formats |= SNDRV_PCM_FMTBIT_S32_LE;
 118                         break;
 119                 default:
 120                         usb_audio_info(chip,
 121                                  "%u:%d : unsupported sample bitwidth %d in %d bytes\n",
 122                                  fp->iface, fp->altsetting,
 123                                  sample_width, sample_bytes);
 124                         break;
 125                 }
 126         }
 127         if (format & (1 << UAC_FORMAT_TYPE_I_PCM8)) {
 128                 /* Dallas DS4201 workaround: it advertises U8 format, but really
 129                    supports S8. */
 130                 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
 131                         pcm_formats |= SNDRV_PCM_FMTBIT_S8;
 132                 else
 133                         pcm_formats |= SNDRV_PCM_FMTBIT_U8;
 134         }
 135         if (format & (1 << UAC_FORMAT_TYPE_I_IEEE_FLOAT)) {
 136                 pcm_formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
 137         }
 138         if (format & (1 << UAC_FORMAT_TYPE_I_ALAW)) {
 139                 pcm_formats |= SNDRV_PCM_FMTBIT_A_LAW;
 140         }
 141         if (format & (1 << UAC_FORMAT_TYPE_I_MULAW)) {
 142                 pcm_formats |= SNDRV_PCM_FMTBIT_MU_LAW;
 143         }
 144         if (format & ~0x3f) {
 145                 usb_audio_info(chip,
 146                          "%u:%d : unsupported format bits %#llx\n",
 147                          fp->iface, fp->altsetting, format);
 148         }
 149
 150         pcm_formats |= snd_usb_interface_dsd_format_quirks(chip, fp, sample_bytes);
 151
 152         return pcm_formats;
 153 }
 154
 155 static int set_fixed_rate(struct audioformat *fp, int rate, int rate_bits)
 156 {
 157         kfree(fp->rate_table);
 158         fp->rate_table = kmalloc(sizeof(int), GFP_KERNEL);
 159         if (!fp->rate_table)
 160                 return -ENOMEM;
 161         fp->nr_rates = 1;
 162         fp->rate_min = rate;
 163         fp->rate_max = rate;
 164         fp->rates = rate_bits;
 165         fp->rate_table[0] = rate;
 166         return 0;
 167 }
 168
 169 /* set up rate_min, rate_max and rates from the rate table */
 170 static void set_rate_table_min_max(struct audioformat *fp)
 171 {
 172         unsigned int rate;
 173         int i;
 174
 175         fp->rate_min = INT_MAX;
 176         fp->rate_max = 0;
 177         fp->rates = 0;
 178         for (i = 0; i < fp->nr_rates; i++) {
 179                 rate = fp->rate_table[i];
 180                 fp->rate_min = min(fp->rate_min, rate);
 181                 fp->rate_max = max(fp->rate_max, rate);
 182                 fp->rates |= snd_pcm_rate_to_rate_bit(rate);
 183         }
 184 }
 185
 186 /*
 187  * parse the format descriptor and stores the possible sample rates
 188  * on the audioformat table (audio class v1).
 189  *
 190  * @dev: usb device
 191  * @fp: audioformat record
 192  * @fmt: the format descriptor
 193  * @offset: the start offset of descriptor pointing the rate type
 194  *          (7 for type I and II, 8 for type II)
 195  */
 196 static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audioformat *fp,
 197                                        unsigned char *fmt, int offset)
 198 {
 199         int nr_rates = fmt[offset];
 200
 201         if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
 202                 usb_audio_err(chip,
 203                         "%u:%d : invalid UAC_FORMAT_TYPE desc\n",
 204                         fp->iface, fp->altsetting);
 205                 return -EINVAL;
 206         }
 207
 208         if (nr_rates) {
 209                 /*
 210                  * build the rate table and bitmap flags
 211                  */
 212                 int r, idx;
 213
 214                 fp->rate_table = kmalloc_array(nr_rates, sizeof(int),
 215                                                GFP_KERNEL);
 216                 if (fp->rate_table == NULL)
 217                         return -ENOMEM;
 218
 219                 fp->nr_rates = 0;
 220                 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
 221                         unsigned int rate = combine_triple(&fmt[idx]);
 222                         if (!rate)
 223                                 continue;
 224                         /* C-Media CM6501 mislabels its 96 kHz altsetting */
 225                         /* Terratec Aureon 7.1 USB C-Media 6206, too */
 226                         /* Ozone Z90 USB C-Media, too */
 227                         if (rate == 48000 && nr_rates == 1 &&
 228                             (chip->usb_id == USB_ID(0x0d8c, 0x0201) ||
 229                              chip->usb_id == USB_ID(0x0d8c, 0x0102) ||
 230                              chip->usb_id == USB_ID(0x0d8c, 0x0078) ||
 231                              chip->usb_id == USB_ID(0x0ccd, 0x00b1)) &&
 232                             fp->altsetting == 5 && fp->maxpacksize == 392)
 233                                 rate = 96000;
 234                         /* Creative VF0420/VF0470 Live Cams report 16 kHz instead of 8kHz */
 235                         if (rate == 16000 &&
 236                             (chip->usb_id == USB_ID(0x041e, 0x4064) ||
 237                              chip->usb_id == USB_ID(0x041e, 0x4068)))
 238                                 rate = 8000;
 239
 240                         fp->rate_table[fp->nr_rates++] = rate;
 241                 }
 242                 if (!fp->nr_rates) {
 243                         usb_audio_info(chip,
 244                                        "%u:%d: All rates were zero\n",
 245                                        fp->iface, fp->altsetting);
 246                         return -EINVAL;
 247                 }
 248                 set_rate_table_min_max(fp);
 249         } else {
 250                 /* continuous rates */
 251                 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
 252                 fp->rate_min = combine_triple(&fmt[offset + 1]);
 253                 fp->rate_max = combine_triple(&fmt[offset + 4]);
 254         }
 255
 256         /* Jabra Evolve 65 headset */
 257         if (chip->usb_id == USB_ID(0x0b0e, 0x030b)) {
 258                 /* only 48kHz for playback while keeping 16kHz for capture */
 259                 if (fp->nr_rates != 1)
 260                         return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
 261         }
 262
 263         return 0;
 264 }
 265
 266
 267 /*
 268  * Presonus Studio 1810c supports a limited set of sampling
 269  * rates per altsetting but reports the full set each time.
 270  * If we don't filter out the unsupported rates and attempt
 271  * to configure the card, it will hang refusing to do any
 272  * further audio I/O until a hard reset is performed.
 273  *
 274  * The list of supported rates per altsetting (set of available
 275  * I/O channels) is described in the owner's manual, section 2.2.
 276  */
 277 static bool s1810c_valid_sample_rate(struct audioformat *fp,
 278                                      unsigned int rate)
 279 {
 280         switch (fp->altsetting) {
 281         case 1:
 282                 /* All ADAT ports available */
 283                 return rate <= 48000;
 284         case 2:
 285                 /* Half of ADAT ports available */
 286                 return (rate == 88200 || rate == 96000);
 287         case 3:
 288                 /* Analog I/O only (no S/PDIF nor ADAT) */
 289                 return rate >= 176400;
 290         default:
 291                 return false;
 292         }
 293         return false;
 294 }
 295
 296 /*
 297  * Many Focusrite devices supports a limited set of sampling rates per
 298  * altsetting. Maximum rate is exposed in the last 4 bytes of Format Type
 299  * descriptor which has a non-standard bLength = 10.
 300  */
 301 static bool focusrite_valid_sample_rate(struct snd_usb_audio *chip,
 302                                         struct audioformat *fp,
 303                                         unsigned int rate)
 304 {
 305         struct usb_interface *iface;
 306         struct usb_host_interface *alts;
 307         unsigned char *fmt;
 308         unsigned int max_rate;
 309
 310         iface = usb_ifnum_to_if(chip->dev, fp->iface);
 311         if (!iface)
 312                 return true;
 313
 314         alts = &iface->altsetting[fp->altset_idx];
 315         fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen,
 316                                       NULL, UAC_FORMAT_TYPE);
 317         if (!fmt)
 318                 return true;
 319
 320         if (fmt[0] == 10) { /* bLength */
 321                 max_rate = combine_quad(&fmt[6]);
 322
 323                 /* Validate max rate */
 324                 if (max_rate != 48000 &&
 325                     max_rate != 96000 &&
 326                     max_rate != 192000 &&
 327                     max_rate != 384000) {
 328
 329                         usb_audio_info(chip,
 330                                 "%u:%d : unexpected max rate: %u\n",
 331                                 fp->iface, fp->altsetting, max_rate);
 332
 333                         return true;
 334                 }
 335
 336                 return rate <= max_rate;
 337         }
 338
 339         return true;
 340 }
 341
 342 /*
 343  * Helper function to walk the array of sample rate triplets reported by
 344  * the device. The problem is that we need to parse whole array first to
 345  * get to know how many sample rates we have to expect.
 346  * Then fp->rate_table can be allocated and filled.
 347  */
 348 static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip,
 349                                         struct audioformat *fp, int nr_triplets,
 350                                         const unsigned char *data)
 351 {
 352         int i, nr_rates = 0;
 353
 354         for (i = 0; i < nr_triplets; i++) {
 355                 int min = combine_quad(&data[2 + 12 * i]);
 356                 int max = combine_quad(&data[6 + 12 * i]);
 357                 int res = combine_quad(&data[10 + 12 * i]);
 358                 unsigned int rate;
 359
 360                 if ((max < 0) || (min < 0) || (res < 0) || (max < min))
 361                         continue;
 362
 363                 /*
 364                  * for ranges with res == 1, we announce a continuous sample
 365                  * rate range, and this function should return 0 for no further
 366                  * parsing.
 367                  */
 368                 if (res == 1) {
 369                         fp->rate_min = min;
 370                         fp->rate_max = max;
 371                         fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
 372                         return 0;
 373                 }
 374
 375                 for (rate = min; rate <= max; rate += res) {
 376
 377                         /* Filter out invalid rates on Presonus Studio 1810c */
 378                         if (chip->usb_id == USB_ID(0x194f, 0x010c) &&
 379                             !s1810c_valid_sample_rate(fp, rate))
 380                                 goto skip_rate;
 381
 382                         /* Filter out invalid rates on Focusrite devices */
 383                         if (USB_ID_VENDOR(chip->usb_id) == 0x1235 &&
 384                             !focusrite_valid_sample_rate(chip, fp, rate))
 385                                 goto skip_rate;
 386
 387                         if (fp->rate_table)
 388                                 fp->rate_table[nr_rates] = rate;
 389                         nr_rates++;
 390                         if (nr_rates >= MAX_NR_RATES) {
 391                                 usb_audio_err(chip, "invalid uac2 rates\n");
 392                                 break;
 393                         }
 394
 395 skip_rate:
 396                         /* avoid endless loop */
 397                         if (res == 0)
 398                                 break;
 399                 }
 400         }
 401
 402         return nr_rates;
 403 }
 404
 405 /* Line6 Helix series and the Rode Rodecaster Pro don't support the
 406  * UAC2_CS_RANGE usb function call. Return a static table of known
 407  * clock rates.
 408  */
 409 static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip,
 410                                                 struct audioformat *fp)
 411 {
 412         switch (chip->usb_id) {
 413         case USB_ID(0x0e41, 0x4241): /* Line6 Helix */
 414         case USB_ID(0x0e41, 0x4242): /* Line6 Helix Rack */
 415         case USB_ID(0x0e41, 0x4244): /* Line6 Helix LT */
 416         case USB_ID(0x0e41, 0x4246): /* Line6 HX-Stomp */
 417         case USB_ID(0x0e41, 0x4253): /* Line6 HX-Stomp XL */
 418         case USB_ID(0x0e41, 0x4247): /* Line6 Pod Go */
 419         case USB_ID(0x0e41, 0x4248): /* Line6 Helix >= fw 2.82 */
 420         case USB_ID(0x0e41, 0x4249): /* Line6 Helix Rack >= fw 2.82 */
 421         case USB_ID(0x0e41, 0x424a): /* Line6 Helix LT >= fw 2.82 */
 422         case USB_ID(0x19f7, 0x0011): /* Rode Rodecaster Pro */
 423                 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
 424         }
 425
 426         return -ENODEV;
 427 }
 428
 429 /* check whether the given altsetting is supported for the already set rate */
 430 static bool check_valid_altsetting_v2v3(struct snd_usb_audio *chip, int iface,
 431                                         int altsetting)
 432 {
 433         struct usb_device *dev = chip->dev;
 434         __le64 raw_data = 0;
 435         u64 data;
 436         int err;
 437
 438         /* we assume 64bit is enough for any altsettings */
 439         if (snd_BUG_ON(altsetting >= 64 - 8))
 440                 return false;
 441
 442         err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR,
 443                               USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
 444                               UAC2_AS_VAL_ALT_SETTINGS << 8,
 445                               iface, &raw_data, sizeof(raw_data));
 446         if (err < 0)
 447                 return false;
 448
 449         data = le64_to_cpu(raw_data);
 450         /* first byte contains the bitmap size */
 451         if ((data & 0xff) * 8 < altsetting)
 452                 return false;
 453         if (data & (1ULL << (altsetting + 8)))
 454                 return true;
 455
 456         return false;
 457 }
 458
 459 /*
 460  * Validate each sample rate with the altsetting
 461  * Rebuild the rate table if only partial values are valid
 462  */
 463 static int validate_sample_rate_table_v2v3(struct snd_usb_audio *chip,
 464                                            struct audioformat *fp,
 465                                            int clock)
 466 {
 467         struct usb_device *dev = chip->dev;
 468         unsigned int *table;
 469         unsigned int nr_rates;
 470         int i, err;
 471
 472         /* performing the rate verification may lead to unexpected USB bus
 473          * behavior afterwards by some unknown reason.  Do this only for the
 474          * known devices.
 475          */
 476         if (!(chip->quirk_flags & QUIRK_FLAG_VALIDATE_RATES))
 477                 return 0; /* don't perform the validation as default */
 478
 479         table = kcalloc(fp->nr_rates, sizeof(*table), GFP_KERNEL);
 480         if (!table)
 481                 return -ENOMEM;
 482
 483         /* clear the interface altsetting at first */
 484         usb_set_interface(dev, fp->iface, 0);
 485
 486         nr_rates = 0;
 487         for (i = 0; i < fp->nr_rates; i++) {
 488                 err = snd_usb_set_sample_rate_v2v3(chip, fp, clock,
 489                                                    fp->rate_table[i]);
 490                 if (err < 0)
 491                         continue;
 492
 493                 if (check_valid_altsetting_v2v3(chip, fp->iface, fp->altsetting))
 494                         table[nr_rates++] = fp->rate_table[i];
 495         }
 496
 497         if (!nr_rates) {
 498                 usb_audio_dbg(chip,
 499                               "No valid sample rate available for %d:%d, assuming a firmware bug\n",
 500                               fp->iface, fp->altsetting);
 501                 nr_rates = fp->nr_rates; /* continue as is */
 502         }
 503
 504         if (fp->nr_rates == nr_rates) {
 505                 kfree(table);
 506                 return 0;
 507         }
 508
 509         kfree(fp->rate_table);
 510         fp->rate_table = table;
 511         fp->nr_rates = nr_rates;
 512         return 0;
 513 }
 514
 515 /*
 516  * parse the format descriptor and stores the possible sample rates
 517  * on the audioformat table (audio class v2 and v3).
 518  */
 519 static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip,
 520                                        struct audioformat *fp)
 521 {
 522         struct usb_device *dev = chip->dev;
 523         unsigned char tmp[2], *data;
 524         int nr_triplets, data_size, ret = 0, ret_l6;
 525         int clock = snd_usb_clock_find_source(chip, fp, false);
 526
 527         if (clock < 0) {
 528                 dev_err(&dev->dev,
 529                         "%s(): unable to find clock source (clock %d)\n",
 530                                 __func__, clock);
 531                 goto err;
 532         }
 533
 534         /* get the number of sample rates first by only fetching 2 bytes */
 535         ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
 536                               USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
 537                               UAC2_CS_CONTROL_SAM_FREQ << 8,
 538                               snd_usb_ctrl_intf(chip) | (clock << 8),
 539                               tmp, sizeof(tmp));
 540
 541         if (ret < 0) {
 542                 /* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */
 543                 ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp);
 544                 if (ret_l6 == -ENODEV) {
 545                         /* no line6 device found continue showing the error */
 546                         dev_err(&dev->dev,
 547                                 "%s(): unable to retrieve number of sample rates (clock %d)\n",
 548                                 __func__, clock);
 549                         goto err;
 550                 }
 551                 if (ret_l6 == 0) {
 552                         dev_info(&dev->dev,
 553                                 "%s(): unable to retrieve number of sample rates: set it to a predefined value (clock %d).\n",
 554                                 __func__, clock);
 555                         return 0;
 556                 }
 557                 ret = ret_l6;
 558                 goto err;
 559         }
 560
 561         nr_triplets = (tmp[1] << 8) | tmp[0];
 562         data_size = 2 + 12 * nr_triplets;
 563         data = kzalloc(data_size, GFP_KERNEL);
 564         if (!data) {
 565                 ret = -ENOMEM;
 566                 goto err;
 567         }
 568
 569         /* now get the full information */
 570         ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
 571                               USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
 572                               UAC2_CS_CONTROL_SAM_FREQ << 8,
 573                               snd_usb_ctrl_intf(chip) | (clock << 8),
 574                               data, data_size);
 575
 576         if (ret < 0) {
 577                 dev_err(&dev->dev,
 578                         "%s(): unable to retrieve sample rate range (clock %d)\n",
 579                                 __func__, clock);
 580                 ret = -EINVAL;
 581                 goto err_free;
 582         }
 583
 584         /* Call the triplet parser, and make sure fp->rate_table is NULL.
 585          * We just use the return value to know how many sample rates we
 586          * will have to deal with. */
 587         kfree(fp->rate_table);
 588         fp->rate_table = NULL;
 589         fp->nr_rates = parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
 590
 591         if (fp->nr_rates == 0) {
 592                 /* SNDRV_PCM_RATE_CONTINUOUS */
 593                 ret = 0;
 594                 goto err_free;
 595         }
 596
 597         fp->rate_table = kmalloc_array(fp->nr_rates, sizeof(int), GFP_KERNEL);
 598         if (!fp->rate_table) {
 599                 ret = -ENOMEM;
 600                 goto err_free;
 601         }
 602
 603         /* Call the triplet parser again, but this time, fp->rate_table is
 604          * allocated, so the rates will be stored */
 605         parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
 606
 607         ret = validate_sample_rate_table_v2v3(chip, fp, clock);
 608         if (ret < 0)
 609                 goto err_free;
 610
 611         set_rate_table_min_max(fp);
 612
 613 err_free:
 614         kfree(data);
 615 err:
 616         return ret;
 617 }
 618
 619 /*
 620  * parse the format type I and III descriptors
 621  */
 622 static int parse_audio_format_i(struct snd_usb_audio *chip,
 623                                 struct audioformat *fp, u64 format,
 624                                 void *_fmt)
 625 {
 626         snd_pcm_format_t pcm_format;
 627         unsigned int fmt_type;
 628         int ret;
 629
 630         switch (fp->protocol) {
 631         default:
 632         case UAC_VERSION_1:
 633         case UAC_VERSION_2: {
 634                 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
 635
 636                 fmt_type = fmt->bFormatType;
 637                 break;
 638         }
 639         case UAC_VERSION_3: {
 640                 /* fp->fmt_type is already set in this case */
 641                 fmt_type = fp->fmt_type;
 642                 break;
 643         }
 644         }
 645
 646         if (fmt_type == UAC_FORMAT_TYPE_III) {
 647                 /* FIXME: the format type is really IECxxx
 648                  *        but we give normal PCM format to get the existing
 649                  *        apps working...
 650                  */
 651                 switch (chip->usb_id) {
 652
 653                 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
 654                         if (chip->setup == 0x00 &&
 655                             fp->altsetting == 6)
 656                                 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
 657                         else
 658                                 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
 659                         break;
 660                 default:
 661                         pcm_format = SNDRV_PCM_FORMAT_S16_LE;
 662                 }
 663                 fp->formats = pcm_format_to_bits(pcm_format);
 664         } else {
 665                 fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt);
 666                 if (!fp->formats)
 667                         return -EINVAL;
 668         }
 669
 670         /* gather possible sample rates */
 671         /* audio class v1 reports possible sample rates as part of the
 672          * proprietary class specific descriptor.
 673          * audio class v2 uses class specific EP0 range requests for that.
 674          */
 675         switch (fp->protocol) {
 676         default:
 677         case UAC_VERSION_1: {
 678                 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
 679
 680                 fp->channels = fmt->bNrChannels;
 681                 ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
 682                 break;
 683         }
 684         case UAC_VERSION_2:
 685         case UAC_VERSION_3: {
 686                 /* fp->channels is already set in this case */
 687                 ret = parse_audio_format_rates_v2v3(chip, fp);
 688                 break;
 689         }
 690         }
 691
 692         if (fp->channels < 1) {
 693                 usb_audio_err(chip,
 694                         "%u:%d : invalid channels %d\n",
 695                         fp->iface, fp->altsetting, fp->channels);
 696                 return -EINVAL;
 697         }
 698
 699         return ret;
 700 }
 701
 702 /*
 703  * parse the format type II descriptor
 704  */
 705 static int parse_audio_format_ii(struct snd_usb_audio *chip,
 706                                  struct audioformat *fp,
 707                                  u64 format, void *_fmt)
 708 {
 709         int brate, framesize, ret;
 710
 711         switch (format) {
 712         case UAC_FORMAT_TYPE_II_AC3:
 713                 /* FIXME: there is no AC3 format defined yet */
 714                 // fp->formats = SNDRV_PCM_FMTBIT_AC3;
 715                 fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */
 716                 break;
 717         case UAC_FORMAT_TYPE_II_MPEG:
 718                 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
 719                 break;
 720         default:
 721                 usb_audio_info(chip,
 722                          "%u:%d : unknown format tag %#llx is detected.  processed as MPEG.\n",
 723                          fp->iface, fp->altsetting, format);
 724                 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
 725                 break;
 726         }
 727
 728         fp->channels = 1;
 729
 730         switch (fp->protocol) {
 731         default:
 732         case UAC_VERSION_1: {
 733                 struct uac_format_type_ii_discrete_descriptor *fmt = _fmt;
 734                 brate = le16_to_cpu(fmt->wMaxBitRate);
 735                 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
 736                 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
 737                 fp->frame_size = framesize;
 738                 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */
 739                 break;
 740         }
 741         case UAC_VERSION_2: {
 742                 struct uac_format_type_ii_ext_descriptor *fmt = _fmt;
 743                 brate = le16_to_cpu(fmt->wMaxBitRate);
 744                 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
 745                 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
 746                 fp->frame_size = framesize;
 747                 ret = parse_audio_format_rates_v2v3(chip, fp);
 748                 break;
 749         }
 750         }
 751
 752         return ret;
 753 }
 754
 755 int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
 756                                struct audioformat *fp, u64 format,
 757                                struct uac_format_type_i_continuous_descriptor *fmt,
 758                                int stream)
 759 {
 760         int err;
 761
 762         switch (fmt->bFormatType) {
 763         case UAC_FORMAT_TYPE_I:
 764         case UAC_FORMAT_TYPE_III:
 765                 err = parse_audio_format_i(chip, fp, format, fmt);
 766                 break;
 767         case UAC_FORMAT_TYPE_II:
 768                 err = parse_audio_format_ii(chip, fp, format, fmt);
 769                 break;
 770         default:
 771                 usb_audio_info(chip,
 772                          "%u:%d : format type %d is not supported yet\n",
 773                          fp->iface, fp->altsetting,
 774                          fmt->bFormatType);
 775                 return -ENOTSUPP;
 776         }
 777         fp->fmt_type = fmt->bFormatType;
 778         if (err < 0)
 779                 return err;
 780 #if 1
 781         /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
 782         /* extigy apparently supports sample rates other than 48k
 783          * but not in ordinary way.  so we enable only 48k atm.
 784          */
 785         if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
 786             chip->usb_id == USB_ID(0x041e, 0x3020) ||
 787             chip->usb_id == USB_ID(0x041e, 0x3061)) {
 788                 if (fmt->bFormatType == UAC_FORMAT_TYPE_I &&
 789                     fp->rates != SNDRV_PCM_RATE_48000 &&
 790                     fp->rates != SNDRV_PCM_RATE_96000)
 791                         return -ENOTSUPP;
 792         }
 793 #endif
 794         return 0;
 795 }
 796
 797 int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
 798                                struct audioformat *fp,
 799                                struct uac3_as_header_descriptor *as,
 800                                int stream)
 801 {
 802         u64 format = le64_to_cpu(as->bmFormats);
 803         int err;
 804
 805         /*
 806          * Type I format bits are D0..D6
 807          * This test works because type IV is not supported
 808          */
 809         if (format & 0x7f)
 810                 fp->fmt_type = UAC_FORMAT_TYPE_I;
 811         else
 812                 fp->fmt_type = UAC_FORMAT_TYPE_III;
 813
 814         err = parse_audio_format_i(chip, fp, format, as);
 815         if (err < 0)
 816                 return err;
 817
 818         return 0;
 819 }