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 usb_audio_info(chip, 44 "%u:%d: invalid format type 0x%llx is detected, processed as PCM\n", 45 fp->iface, fp->altsetting, format); 46 format = UAC_FORMAT_TYPE_I_PCM; 47 } 48 sample_width = fmt->bBitResolution; 49 sample_bytes = fmt->bSubframeSize; 50 format = 1ULL << format; 51 break; 52 } 53 54 case UAC_VERSION_2: { 55 struct uac_format_type_i_ext_descriptor *fmt = _fmt; 56 sample_width = fmt->bBitResolution; 57 sample_bytes = fmt->bSubslotSize; 58 59 if (format & UAC2_FORMAT_TYPE_I_RAW_DATA) { 60 pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL; 61 /* flag potentially raw DSD capable altsettings */ 62 fp->dsd_raw = true; 63 } 64 65 format <<= 1; 66 break; 67 } 68 case UAC_VERSION_3: { 69 struct uac3_as_header_descriptor *as = _fmt; 70 71 sample_width = as->bBitResolution; 72 sample_bytes = as->bSubslotSize; 73 74 if (format & UAC3_FORMAT_TYPE_I_RAW_DATA) 75 pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL; 76 77 format <<= 1; 78 break; 79 } 80 } 81 82 fp->fmt_bits = sample_width; 83 84 if ((pcm_formats == 0) && 85 (format == 0 || format == (1 << UAC_FORMAT_TYPE_I_UNDEFINED))) { 86 /* some devices don't define this correctly... */ 87 usb_audio_info(chip, "%u:%d : format type 0 is detected, processed as PCM\n", 88 fp->iface, fp->altsetting); 89 format = 1 << UAC_FORMAT_TYPE_I_PCM; 90 } 91 if (format & (1 << UAC_FORMAT_TYPE_I_PCM)) { 92 if (((chip->usb_id == USB_ID(0x0582, 0x0016)) || 93 /* Edirol SD-90 */ 94 (chip->usb_id == USB_ID(0x0582, 0x000c))) && 95 /* Roland SC-D70 */ 96 sample_width == 24 && sample_bytes == 2) 97 sample_bytes = 3; 98 else if (sample_width > sample_bytes * 8) { 99 usb_audio_info(chip, "%u:%d : sample bitwidth %d in over sample bytes %d\n", 100 fp->iface, fp->altsetting, 101 sample_width, sample_bytes); 102 } 103 /* check the format byte size */ 104 switch (sample_bytes) { 105 case 1: 106 pcm_formats |= SNDRV_PCM_FMTBIT_S8; 107 break; 108 case 2: 109 if (snd_usb_is_big_endian_format(chip, fp)) 110 pcm_formats |= SNDRV_PCM_FMTBIT_S16_BE; /* grrr, big endian!! */ 111 else 112 pcm_formats |= SNDRV_PCM_FMTBIT_S16_LE; 113 break; 114 case 3: 115 if (snd_usb_is_big_endian_format(chip, fp)) 116 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3BE; /* grrr, big endian!! */ 117 else 118 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3LE; 119 break; 120 case 4: 121 pcm_formats |= SNDRV_PCM_FMTBIT_S32_LE; 122 break; 123 default: 124 usb_audio_info(chip, 125 "%u:%d : unsupported sample bitwidth %d in %d bytes\n", 126 fp->iface, fp->altsetting, 127 sample_width, sample_bytes); 128 break; 129 } 130 } 131 if (format & (1 << UAC_FORMAT_TYPE_I_PCM8)) { 132 /* Dallas DS4201 workaround: it advertises U8 format, but really 133 supports S8. */ 134 if (chip->usb_id == USB_ID(0x04fa, 0x4201)) 135 pcm_formats |= SNDRV_PCM_FMTBIT_S8; 136 else 137 pcm_formats |= SNDRV_PCM_FMTBIT_U8; 138 } 139 if (format & (1 << UAC_FORMAT_TYPE_I_IEEE_FLOAT)) { 140 pcm_formats |= SNDRV_PCM_FMTBIT_FLOAT_LE; 141 } 142 if (format & (1 << UAC_FORMAT_TYPE_I_ALAW)) { 143 pcm_formats |= SNDRV_PCM_FMTBIT_A_LAW; 144 } 145 if (format & (1 << UAC_FORMAT_TYPE_I_MULAW)) { 146 pcm_formats |= SNDRV_PCM_FMTBIT_MU_LAW; 147 } 148 if (format & ~0x3f) { 149 usb_audio_info(chip, 150 "%u:%d : unsupported format bits %#llx\n", 151 fp->iface, fp->altsetting, format); 152 } 153 154 pcm_formats |= snd_usb_interface_dsd_format_quirks(chip, fp, sample_bytes); 155 156 return pcm_formats; 157 } 158 159 static int set_fixed_rate(struct audioformat *fp, int rate, int rate_bits) 160 { 161 kfree(fp->rate_table); 162 fp->rate_table = kmalloc(sizeof(int), GFP_KERNEL); 163 if (!fp->rate_table) 164 return -ENOMEM; 165 fp->nr_rates = 1; 166 fp->rate_min = rate; 167 fp->rate_max = rate; 168 fp->rates = rate_bits; 169 fp->rate_table[0] = rate; 170 return 0; 171 } 172 173 /* set up rate_min, rate_max and rates from the rate table */ 174 static void set_rate_table_min_max(struct audioformat *fp) 175 { 176 unsigned int rate; 177 int i; 178 179 fp->rate_min = INT_MAX; 180 fp->rate_max = 0; 181 fp->rates = 0; 182 for (i = 0; i < fp->nr_rates; i++) { 183 rate = fp->rate_table[i]; 184 fp->rate_min = min(fp->rate_min, rate); 185 fp->rate_max = max(fp->rate_max, rate); 186 fp->rates |= snd_pcm_rate_to_rate_bit(rate); 187 } 188 } 189 190 /* 191 * parse the format descriptor and stores the possible sample rates 192 * on the audioformat table (audio class v1). 193 * 194 * @dev: usb device 195 * @fp: audioformat record 196 * @fmt: the format descriptor 197 * @offset: the start offset of descriptor pointing the rate type 198 * (7 for type I and II, 8 for type II) 199 */ 200 static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audioformat *fp, 201 unsigned char *fmt, int offset) 202 { 203 int nr_rates = fmt[offset]; 204 205 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) { 206 usb_audio_err(chip, 207 "%u:%d : invalid UAC_FORMAT_TYPE desc\n", 208 fp->iface, fp->altsetting); 209 return -EINVAL; 210 } 211 212 if (nr_rates) { 213 /* 214 * build the rate table and bitmap flags 215 */ 216 int r, idx; 217 218 fp->rate_table = kmalloc_array(nr_rates, sizeof(int), 219 GFP_KERNEL); 220 if (fp->rate_table == NULL) 221 return -ENOMEM; 222 223 fp->nr_rates = 0; 224 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) { 225 unsigned int rate = combine_triple(&fmt[idx]); 226 if (!rate) 227 continue; 228 /* C-Media CM6501 mislabels its 96 kHz altsetting */ 229 /* Terratec Aureon 7.1 USB C-Media 6206, too */ 230 /* Ozone Z90 USB C-Media, too */ 231 if (rate == 48000 && nr_rates == 1 && 232 (chip->usb_id == USB_ID(0x0d8c, 0x0201) || 233 chip->usb_id == USB_ID(0x0d8c, 0x0102) || 234 chip->usb_id == USB_ID(0x0d8c, 0x0078) || 235 chip->usb_id == USB_ID(0x0ccd, 0x00b1)) && 236 fp->altsetting == 5 && fp->maxpacksize == 392) 237 rate = 96000; 238 /* Creative VF0420/VF0470 Live Cams report 16 kHz instead of 8kHz */ 239 if (rate == 16000 && 240 (chip->usb_id == USB_ID(0x041e, 0x4064) || 241 chip->usb_id == USB_ID(0x041e, 0x4068))) 242 rate = 8000; 243 244 fp->rate_table[fp->nr_rates++] = rate; 245 } 246 if (!fp->nr_rates) { 247 usb_audio_info(chip, 248 "%u:%d: All rates were zero\n", 249 fp->iface, fp->altsetting); 250 return -EINVAL; 251 } 252 set_rate_table_min_max(fp); 253 } else { 254 /* continuous rates */ 255 fp->rates = SNDRV_PCM_RATE_CONTINUOUS; 256 fp->rate_min = combine_triple(&fmt[offset + 1]); 257 fp->rate_max = combine_triple(&fmt[offset + 4]); 258 } 259 260 /* Jabra Evolve 65 headset */ 261 if (chip->usb_id == USB_ID(0x0b0e, 0x030b)) { 262 /* only 48kHz for playback while keeping 16kHz for capture */ 263 if (fp->nr_rates != 1) 264 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000); 265 } 266 267 return 0; 268 } 269 270 271 /* 272 * Presonus Studio 1810c supports a limited set of sampling 273 * rates per altsetting but reports the full set each time. 274 * If we don't filter out the unsupported rates and attempt 275 * to configure the card, it will hang refusing to do any 276 * further audio I/O until a hard reset is performed. 277 * 278 * The list of supported rates per altsetting (set of available 279 * I/O channels) is described in the owner's manual, section 2.2. 280 */ 281 static bool s1810c_valid_sample_rate(struct audioformat *fp, 282 unsigned int rate) 283 { 284 switch (fp->altsetting) { 285 case 1: 286 /* All ADAT ports available */ 287 return rate <= 48000; 288 case 2: 289 /* Half of ADAT ports available */ 290 return (rate == 88200 || rate == 96000); 291 case 3: 292 /* Analog I/O only (no S/PDIF nor ADAT) */ 293 return rate >= 176400; 294 default: 295 return false; 296 } 297 return false; 298 } 299 300 /* 301 * Many Focusrite devices supports a limited set of sampling rates per 302 * altsetting. Maximum rate is exposed in the last 4 bytes of Format Type 303 * descriptor which has a non-standard bLength = 10. 304 */ 305 static bool focusrite_valid_sample_rate(struct snd_usb_audio *chip, 306 struct audioformat *fp, 307 unsigned int rate) 308 { 309 struct usb_interface *iface; 310 struct usb_host_interface *alts; 311 unsigned char *fmt; 312 unsigned int max_rate; 313 314 iface = usb_ifnum_to_if(chip->dev, fp->iface); 315 if (!iface) 316 return true; 317 318 alts = &iface->altsetting[fp->altset_idx]; 319 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, 320 NULL, UAC_FORMAT_TYPE); 321 if (!fmt) 322 return true; 323 324 if (fmt[0] == 10) { /* bLength */ 325 max_rate = combine_quad(&fmt[6]); 326 327 /* Validate max rate */ 328 if (max_rate != 48000 && 329 max_rate != 96000 && 330 max_rate != 192000 && 331 max_rate != 384000) { 332 333 usb_audio_info(chip, 334 "%u:%d : unexpected max rate: %u\n", 335 fp->iface, fp->altsetting, max_rate); 336 337 return true; 338 } 339 340 return rate <= max_rate; 341 } 342 343 return true; 344 } 345 346 /* 347 * Helper function to walk the array of sample rate triplets reported by 348 * the device. The problem is that we need to parse whole array first to 349 * get to know how many sample rates we have to expect. 350 * Then fp->rate_table can be allocated and filled. 351 */ 352 static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip, 353 struct audioformat *fp, int nr_triplets, 354 const unsigned char *data) 355 { 356 int i, nr_rates = 0; 357 358 for (i = 0; i < nr_triplets; i++) { 359 int min = combine_quad(&data[2 + 12 * i]); 360 int max = combine_quad(&data[6 + 12 * i]); 361 int res = combine_quad(&data[10 + 12 * i]); 362 unsigned int rate; 363 364 if ((max < 0) || (min < 0) || (res < 0) || (max < min)) 365 continue; 366 367 /* 368 * for ranges with res == 1, we announce a continuous sample 369 * rate range, and this function should return 0 for no further 370 * parsing. 371 */ 372 if (res == 1) { 373 fp->rate_min = min; 374 fp->rate_max = max; 375 fp->rates = SNDRV_PCM_RATE_CONTINUOUS; 376 return 0; 377 } 378 379 for (rate = min; rate <= max; rate += res) { 380 381 /* Filter out invalid rates on Presonus Studio 1810c */ 382 if (chip->usb_id == USB_ID(0x194f, 0x010c) && 383 !s1810c_valid_sample_rate(fp, rate)) 384 goto skip_rate; 385 386 /* Filter out invalid rates on Focusrite devices */ 387 if (USB_ID_VENDOR(chip->usb_id) == 0x1235 && 388 !focusrite_valid_sample_rate(chip, fp, rate)) 389 goto skip_rate; 390 391 if (fp->rate_table) 392 fp->rate_table[nr_rates] = rate; 393 nr_rates++; 394 if (nr_rates >= MAX_NR_RATES) { 395 usb_audio_err(chip, "invalid uac2 rates\n"); 396 break; 397 } 398 399 skip_rate: 400 /* avoid endless loop */ 401 if (res == 0) 402 break; 403 } 404 } 405 406 return nr_rates; 407 } 408 409 /* Line6 Helix series and the Rode Rodecaster Pro don't support the 410 * UAC2_CS_RANGE usb function call. Return a static table of known 411 * clock rates. 412 */ 413 static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip, 414 struct audioformat *fp) 415 { 416 switch (chip->usb_id) { 417 case USB_ID(0x0e41, 0x4241): /* Line6 Helix */ 418 case USB_ID(0x0e41, 0x4242): /* Line6 Helix Rack */ 419 case USB_ID(0x0e41, 0x4244): /* Line6 Helix LT */ 420 case USB_ID(0x0e41, 0x4246): /* Line6 HX-Stomp */ 421 case USB_ID(0x0e41, 0x4253): /* Line6 HX-Stomp XL */ 422 case USB_ID(0x0e41, 0x4247): /* Line6 Pod Go */ 423 case USB_ID(0x0e41, 0x4248): /* Line6 Helix >= fw 2.82 */ 424 case USB_ID(0x0e41, 0x4249): /* Line6 Helix Rack >= fw 2.82 */ 425 case USB_ID(0x0e41, 0x424a): /* Line6 Helix LT >= fw 2.82 */ 426 case USB_ID(0x0e41, 0x424b): /* Line6 Pod Go */ 427 case USB_ID(0x19f7, 0x0011): /* Rode Rodecaster Pro */ 428 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000); 429 } 430 431 return -ENODEV; 432 } 433 434 /* check whether the given altsetting is supported for the already set rate */ 435 static bool check_valid_altsetting_v2v3(struct snd_usb_audio *chip, int iface, 436 int altsetting) 437 { 438 struct usb_device *dev = chip->dev; 439 __le64 raw_data = 0; 440 u64 data; 441 int err; 442 443 /* we assume 64bit is enough for any altsettings */ 444 if (snd_BUG_ON(altsetting >= 64 - 8)) 445 return false; 446 447 err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR, 448 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, 449 UAC2_AS_VAL_ALT_SETTINGS << 8, 450 iface, &raw_data, sizeof(raw_data)); 451 if (err < 0) 452 return false; 453 454 data = le64_to_cpu(raw_data); 455 /* first byte contains the bitmap size */ 456 if ((data & 0xff) * 8 < altsetting) 457 return false; 458 if (data & (1ULL << (altsetting + 8))) 459 return true; 460 461 return false; 462 } 463 464 /* 465 * Validate each sample rate with the altsetting 466 * Rebuild the rate table if only partial values are valid 467 */ 468 static int validate_sample_rate_table_v2v3(struct snd_usb_audio *chip, 469 struct audioformat *fp, 470 int clock) 471 { 472 struct usb_device *dev = chip->dev; 473 unsigned int *table; 474 unsigned int nr_rates; 475 int i, err; 476 477 /* performing the rate verification may lead to unexpected USB bus 478 * behavior afterwards by some unknown reason. Do this only for the 479 * known devices. 480 */ 481 if (!(chip->quirk_flags & QUIRK_FLAG_VALIDATE_RATES)) 482 return 0; /* don't perform the validation as default */ 483 484 table = kcalloc(fp->nr_rates, sizeof(*table), GFP_KERNEL); 485 if (!table) 486 return -ENOMEM; 487 488 /* clear the interface altsetting at first */ 489 usb_set_interface(dev, fp->iface, 0); 490 491 nr_rates = 0; 492 for (i = 0; i < fp->nr_rates; i++) { 493 err = snd_usb_set_sample_rate_v2v3(chip, fp, clock, 494 fp->rate_table[i]); 495 if (err < 0) 496 continue; 497 498 if (check_valid_altsetting_v2v3(chip, fp->iface, fp->altsetting)) 499 table[nr_rates++] = fp->rate_table[i]; 500 } 501 502 if (!nr_rates) { 503 usb_audio_dbg(chip, 504 "No valid sample rate available for %d:%d, assuming a firmware bug\n", 505 fp->iface, fp->altsetting); 506 nr_rates = fp->nr_rates; /* continue as is */ 507 } 508 509 if (fp->nr_rates == nr_rates) { 510 kfree(table); 511 return 0; 512 } 513 514 kfree(fp->rate_table); 515 fp->rate_table = table; 516 fp->nr_rates = nr_rates; 517 return 0; 518 } 519 520 /* 521 * parse the format descriptor and stores the possible sample rates 522 * on the audioformat table (audio class v2 and v3). 523 */ 524 static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip, 525 struct audioformat *fp) 526 { 527 struct usb_device *dev = chip->dev; 528 unsigned char tmp[2], *data; 529 int nr_triplets, data_size, ret = 0, ret_l6; 530 int clock = snd_usb_clock_find_source(chip, fp, false); 531 532 if (clock < 0) { 533 dev_err(&dev->dev, 534 "%s(): unable to find clock source (clock %d)\n", 535 __func__, clock); 536 goto err; 537 } 538 539 /* get the number of sample rates first by only fetching 2 bytes */ 540 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE, 541 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, 542 UAC2_CS_CONTROL_SAM_FREQ << 8, 543 snd_usb_ctrl_intf(chip) | (clock << 8), 544 tmp, sizeof(tmp)); 545 546 if (ret < 0) { 547 /* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */ 548 ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp); 549 if (ret_l6 == -ENODEV) { 550 /* no line6 device found continue showing the error */ 551 dev_err(&dev->dev, 552 "%s(): unable to retrieve number of sample rates (clock %d)\n", 553 __func__, clock); 554 goto err; 555 } 556 if (ret_l6 == 0) { 557 dev_info(&dev->dev, 558 "%s(): unable to retrieve number of sample rates: set it to a predefined value (clock %d).\n", 559 __func__, clock); 560 return 0; 561 } 562 ret = ret_l6; 563 goto err; 564 } 565 566 nr_triplets = (tmp[1] << 8) | tmp[0]; 567 data_size = 2 + 12 * nr_triplets; 568 data = kzalloc(data_size, GFP_KERNEL); 569 if (!data) { 570 ret = -ENOMEM; 571 goto err; 572 } 573 574 /* now get the full information */ 575 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE, 576 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, 577 UAC2_CS_CONTROL_SAM_FREQ << 8, 578 snd_usb_ctrl_intf(chip) | (clock << 8), 579 data, data_size); 580 581 if (ret < 0) { 582 dev_err(&dev->dev, 583 "%s(): unable to retrieve sample rate range (clock %d)\n", 584 __func__, clock); 585 ret = -EINVAL; 586 goto err_free; 587 } 588 589 /* Call the triplet parser, and make sure fp->rate_table is NULL. 590 * We just use the return value to know how many sample rates we 591 * will have to deal with. */ 592 kfree(fp->rate_table); 593 fp->rate_table = NULL; 594 fp->nr_rates = parse_uac2_sample_rate_range(chip, fp, nr_triplets, data); 595 596 if (fp->nr_rates == 0) { 597 /* SNDRV_PCM_RATE_CONTINUOUS */ 598 ret = 0; 599 goto err_free; 600 } 601 602 fp->rate_table = kmalloc_array(fp->nr_rates, sizeof(int), GFP_KERNEL); 603 if (!fp->rate_table) { 604 ret = -ENOMEM; 605 goto err_free; 606 } 607 608 /* Call the triplet parser again, but this time, fp->rate_table is 609 * allocated, so the rates will be stored */ 610 parse_uac2_sample_rate_range(chip, fp, nr_triplets, data); 611 612 ret = validate_sample_rate_table_v2v3(chip, fp, clock); 613 if (ret < 0) 614 goto err_free; 615 616 set_rate_table_min_max(fp); 617 618 err_free: 619 kfree(data); 620 err: 621 return ret; 622 } 623 624 /* 625 * parse the format type I and III descriptors 626 */ 627 static int parse_audio_format_i(struct snd_usb_audio *chip, 628 struct audioformat *fp, u64 format, 629 void *_fmt) 630 { 631 snd_pcm_format_t pcm_format; 632 unsigned int fmt_type; 633 int ret; 634 635 switch (fp->protocol) { 636 default: 637 case UAC_VERSION_1: 638 case UAC_VERSION_2: { 639 struct uac_format_type_i_continuous_descriptor *fmt = _fmt; 640 641 fmt_type = fmt->bFormatType; 642 break; 643 } 644 case UAC_VERSION_3: { 645 /* fp->fmt_type is already set in this case */ 646 fmt_type = fp->fmt_type; 647 break; 648 } 649 } 650 651 if (fmt_type == UAC_FORMAT_TYPE_III) { 652 /* FIXME: the format type is really IECxxx 653 * but we give normal PCM format to get the existing 654 * apps working... 655 */ 656 switch (chip->usb_id) { 657 658 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */ 659 if (chip->setup == 0x00 && 660 fp->altsetting == 6) 661 pcm_format = SNDRV_PCM_FORMAT_S16_BE; 662 else 663 pcm_format = SNDRV_PCM_FORMAT_S16_LE; 664 break; 665 default: 666 pcm_format = SNDRV_PCM_FORMAT_S16_LE; 667 } 668 fp->formats = pcm_format_to_bits(pcm_format); 669 } else { 670 fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt); 671 if (!fp->formats) 672 return -EINVAL; 673 } 674 675 /* gather possible sample rates */ 676 /* audio class v1 reports possible sample rates as part of the 677 * proprietary class specific descriptor. 678 * audio class v2 uses class specific EP0 range requests for that. 679 */ 680 switch (fp->protocol) { 681 default: 682 case UAC_VERSION_1: { 683 struct uac_format_type_i_continuous_descriptor *fmt = _fmt; 684 685 fp->channels = fmt->bNrChannels; 686 ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7); 687 break; 688 } 689 case UAC_VERSION_2: 690 case UAC_VERSION_3: { 691 /* fp->channels is already set in this case */ 692 ret = parse_audio_format_rates_v2v3(chip, fp); 693 break; 694 } 695 } 696 697 if (fp->channels < 1) { 698 usb_audio_err(chip, 699 "%u:%d : invalid channels %d\n", 700 fp->iface, fp->altsetting, fp->channels); 701 return -EINVAL; 702 } 703 704 return ret; 705 } 706 707 /* 708 * parse the format type II descriptor 709 */ 710 static int parse_audio_format_ii(struct snd_usb_audio *chip, 711 struct audioformat *fp, 712 u64 format, void *_fmt) 713 { 714 int brate, framesize, ret; 715 716 switch (format) { 717 case UAC_FORMAT_TYPE_II_AC3: 718 /* FIXME: there is no AC3 format defined yet */ 719 // fp->formats = SNDRV_PCM_FMTBIT_AC3; 720 fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */ 721 break; 722 case UAC_FORMAT_TYPE_II_MPEG: 723 fp->formats = SNDRV_PCM_FMTBIT_MPEG; 724 break; 725 default: 726 usb_audio_info(chip, 727 "%u:%d : unknown format tag %#llx is detected. processed as MPEG.\n", 728 fp->iface, fp->altsetting, format); 729 fp->formats = SNDRV_PCM_FMTBIT_MPEG; 730 break; 731 } 732 733 fp->channels = 1; 734 735 switch (fp->protocol) { 736 default: 737 case UAC_VERSION_1: { 738 struct uac_format_type_ii_discrete_descriptor *fmt = _fmt; 739 brate = le16_to_cpu(fmt->wMaxBitRate); 740 framesize = le16_to_cpu(fmt->wSamplesPerFrame); 741 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize); 742 fp->frame_size = framesize; 743 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */ 744 break; 745 } 746 case UAC_VERSION_2: { 747 struct uac_format_type_ii_ext_descriptor *fmt = _fmt; 748 brate = le16_to_cpu(fmt->wMaxBitRate); 749 framesize = le16_to_cpu(fmt->wSamplesPerFrame); 750 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize); 751 fp->frame_size = framesize; 752 ret = parse_audio_format_rates_v2v3(chip, fp); 753 break; 754 } 755 } 756 757 return ret; 758 } 759 760 int snd_usb_parse_audio_format(struct snd_usb_audio *chip, 761 struct audioformat *fp, u64 format, 762 struct uac_format_type_i_continuous_descriptor *fmt, 763 int stream) 764 { 765 int err; 766 767 switch (fmt->bFormatType) { 768 case UAC_FORMAT_TYPE_I: 769 case UAC_FORMAT_TYPE_III: 770 err = parse_audio_format_i(chip, fp, format, fmt); 771 break; 772 case UAC_FORMAT_TYPE_II: 773 err = parse_audio_format_ii(chip, fp, format, fmt); 774 break; 775 default: 776 usb_audio_info(chip, 777 "%u:%d : format type %d is not supported yet\n", 778 fp->iface, fp->altsetting, 779 fmt->bFormatType); 780 return -ENOTSUPP; 781 } 782 fp->fmt_type = fmt->bFormatType; 783 if (err < 0) 784 return err; 785 #if 1 786 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */ 787 /* extigy apparently supports sample rates other than 48k 788 * but not in ordinary way. so we enable only 48k atm. 789 */ 790 if (chip->usb_id == USB_ID(0x041e, 0x3000) || 791 chip->usb_id == USB_ID(0x041e, 0x3020) || 792 chip->usb_id == USB_ID(0x041e, 0x3061)) { 793 if (fmt->bFormatType == UAC_FORMAT_TYPE_I && 794 fp->rates != SNDRV_PCM_RATE_48000 && 795 fp->rates != SNDRV_PCM_RATE_96000) 796 return -ENOTSUPP; 797 } 798 #endif 799 return 0; 800 } 801 802 int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip, 803 struct audioformat *fp, 804 struct uac3_as_header_descriptor *as, 805 int stream) 806 { 807 u64 format = le64_to_cpu(as->bmFormats); 808 int err; 809 810 /* 811 * Type I format bits are D0..D6 812 * This test works because type IV is not supported 813 */ 814 if (format & 0x7f) 815 fp->fmt_type = UAC_FORMAT_TYPE_I; 816 else 817 fp->fmt_type = UAC_FORMAT_TYPE_III; 818 819 err = parse_audio_format_i(chip, fp, format, as); 820 if (err < 0) 821 return err; 822 823 return 0; 824 } 825