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 * Many Focusrite devices supports a limited set of sampling rates per 282 * altsetting. Maximum rate is exposed in the last 4 bytes of Format Type 283 * descriptor which has a non-standard bLength = 10. 284 */ 285 static bool focusrite_valid_sample_rate(struct snd_usb_audio *chip, 286 struct audioformat *fp, 287 unsigned int rate) 288 { 289 struct usb_interface *iface; 290 struct usb_host_interface *alts; 291 unsigned char *fmt; 292 unsigned int max_rate; 293 294 iface = usb_ifnum_to_if(chip->dev, fp->iface); 295 if (!iface) 296 return true; 297 298 alts = &iface->altsetting[fp->altset_idx]; 299 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, 300 NULL, UAC_FORMAT_TYPE); 301 if (!fmt) 302 return true; 303 304 if (fmt[0] == 10) { /* bLength */ 305 max_rate = combine_quad(&fmt[6]); 306 307 /* Validate max rate */ 308 if (max_rate != 48000 && 309 max_rate != 96000 && 310 max_rate != 192000 && 311 max_rate != 384000) { 312 313 usb_audio_info(chip, 314 "%u:%d : unexpected max rate: %u\n", 315 fp->iface, fp->altsetting, max_rate); 316 317 return true; 318 } 319 320 return rate <= max_rate; 321 } 322 323 return true; 324 } 325 326 /* 327 * Helper function to walk the array of sample rate triplets reported by 328 * the device. The problem is that we need to parse whole array first to 329 * get to know how many sample rates we have to expect. 330 * Then fp->rate_table can be allocated and filled. 331 */ 332 static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip, 333 struct audioformat *fp, int nr_triplets, 334 const unsigned char *data) 335 { 336 int i, nr_rates = 0; 337 338 fp->rates = fp->rate_min = fp->rate_max = 0; 339 340 for (i = 0; i < nr_triplets; i++) { 341 int min = combine_quad(&data[2 + 12 * i]); 342 int max = combine_quad(&data[6 + 12 * i]); 343 int res = combine_quad(&data[10 + 12 * i]); 344 unsigned int rate; 345 346 if ((max < 0) || (min < 0) || (res < 0) || (max < min)) 347 continue; 348 349 /* 350 * for ranges with res == 1, we announce a continuous sample 351 * rate range, and this function should return 0 for no further 352 * parsing. 353 */ 354 if (res == 1) { 355 fp->rate_min = min; 356 fp->rate_max = max; 357 fp->rates = SNDRV_PCM_RATE_CONTINUOUS; 358 return 0; 359 } 360 361 for (rate = min; rate <= max; rate += res) { 362 363 /* Filter out invalid rates on Presonus Studio 1810c */ 364 if (chip->usb_id == USB_ID(0x0194f, 0x010c) && 365 !s1810c_valid_sample_rate(fp, rate)) 366 goto skip_rate; 367 368 /* Filter out invalid rates on Focusrite devices */ 369 if (USB_ID_VENDOR(chip->usb_id) == 0x1235 && 370 !focusrite_valid_sample_rate(chip, fp, rate)) 371 goto skip_rate; 372 373 if (fp->rate_table) 374 fp->rate_table[nr_rates] = rate; 375 if (!fp->rate_min || rate < fp->rate_min) 376 fp->rate_min = rate; 377 if (!fp->rate_max || rate > fp->rate_max) 378 fp->rate_max = rate; 379 fp->rates |= snd_pcm_rate_to_rate_bit(rate); 380 381 nr_rates++; 382 if (nr_rates >= MAX_NR_RATES) { 383 usb_audio_err(chip, "invalid uac2 rates\n"); 384 break; 385 } 386 387 skip_rate: 388 /* avoid endless loop */ 389 if (res == 0) 390 break; 391 } 392 } 393 394 return nr_rates; 395 } 396 397 /* Line6 Helix series and the Rode Rodecaster Pro don't support the 398 * UAC2_CS_RANGE usb function call. Return a static table of known 399 * clock rates. 400 */ 401 static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip, 402 struct audioformat *fp) 403 { 404 switch (chip->usb_id) { 405 case USB_ID(0x0e41, 0x4241): /* Line6 Helix */ 406 case USB_ID(0x0e41, 0x4242): /* Line6 Helix Rack */ 407 case USB_ID(0x0e41, 0x4244): /* Line6 Helix LT */ 408 case USB_ID(0x0e41, 0x4246): /* Line6 HX-Stomp */ 409 case USB_ID(0x0e41, 0x4247): /* Line6 Pod Go */ 410 case USB_ID(0x0e41, 0x4248): /* Line6 Helix >= fw 2.82 */ 411 case USB_ID(0x0e41, 0x4249): /* Line6 Helix Rack >= fw 2.82 */ 412 case USB_ID(0x0e41, 0x424a): /* Line6 Helix LT >= fw 2.82 */ 413 case USB_ID(0x19f7, 0x0011): /* Rode Rodecaster Pro */ 414 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000); 415 } 416 417 return -ENODEV; 418 } 419 420 /* check whether the given altsetting is supported for the already set rate */ 421 static bool check_valid_altsetting_v2v3(struct snd_usb_audio *chip, int iface, 422 int altsetting) 423 { 424 struct usb_device *dev = chip->dev; 425 __le64 raw_data = 0; 426 u64 data; 427 int err; 428 429 /* we assume 64bit is enough for any altsettings */ 430 if (snd_BUG_ON(altsetting >= 64 - 8)) 431 return false; 432 433 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR, 434 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, 435 UAC2_AS_VAL_ALT_SETTINGS << 8, 436 iface, &raw_data, sizeof(raw_data)); 437 if (err < 0) 438 return false; 439 440 data = le64_to_cpu(raw_data); 441 /* first byte contains the bitmap size */ 442 if ((data & 0xff) * 8 < altsetting) 443 return false; 444 if (data & (1ULL << (altsetting + 8))) 445 return true; 446 447 return false; 448 } 449 450 /* 451 * Validate each sample rate with the altsetting 452 * Rebuild the rate table if only partial values are valid 453 */ 454 static int validate_sample_rate_table_v2v3(struct snd_usb_audio *chip, 455 struct audioformat *fp, 456 int clock) 457 { 458 struct usb_device *dev = chip->dev; 459 unsigned int *table; 460 unsigned int nr_rates; 461 unsigned int rate_min = 0x7fffffff; 462 unsigned int rate_max = 0; 463 unsigned int rates = 0; 464 int i, err; 465 466 table = kcalloc(fp->nr_rates, sizeof(*table), GFP_KERNEL); 467 if (!table) 468 return -ENOMEM; 469 470 /* clear the interface altsetting at first */ 471 usb_set_interface(dev, fp->iface, 0); 472 473 nr_rates = 0; 474 for (i = 0; i < fp->nr_rates; i++) { 475 err = snd_usb_set_sample_rate_v2v3(chip, fp, clock, 476 fp->rate_table[i]); 477 if (err < 0) 478 continue; 479 480 if (check_valid_altsetting_v2v3(chip, fp->iface, fp->altsetting)) { 481 table[nr_rates++] = fp->rate_table[i]; 482 if (rate_min > fp->rate_table[i]) 483 rate_min = fp->rate_table[i]; 484 if (rate_max < fp->rate_table[i]) 485 rate_max = fp->rate_table[i]; 486 rates |= snd_pcm_rate_to_rate_bit(fp->rate_table[i]); 487 } 488 } 489 490 if (!nr_rates) { 491 usb_audio_dbg(chip, 492 "No valid sample rate available for %d:%d, assuming a firmware bug\n", 493 fp->iface, fp->altsetting); 494 nr_rates = fp->nr_rates; /* continue as is */ 495 } 496 497 if (fp->nr_rates == nr_rates) { 498 kfree(table); 499 return 0; 500 } 501 502 kfree(fp->rate_table); 503 fp->rate_table = table; 504 fp->nr_rates = nr_rates; 505 fp->rate_min = rate_min; 506 fp->rate_max = rate_max; 507 fp->rates = rates; 508 return 0; 509 } 510 511 /* 512 * parse the format descriptor and stores the possible sample rates 513 * on the audioformat table (audio class v2 and v3). 514 */ 515 static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip, 516 struct audioformat *fp) 517 { 518 struct usb_device *dev = chip->dev; 519 unsigned char tmp[2], *data; 520 int nr_triplets, data_size, ret = 0, ret_l6; 521 int clock = snd_usb_clock_find_source(chip, fp, false); 522 523 if (clock < 0) { 524 dev_err(&dev->dev, 525 "%s(): unable to find clock source (clock %d)\n", 526 __func__, clock); 527 goto err; 528 } 529 530 /* get the number of sample rates first by only fetching 2 bytes */ 531 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE, 532 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, 533 UAC2_CS_CONTROL_SAM_FREQ << 8, 534 snd_usb_ctrl_intf(chip) | (clock << 8), 535 tmp, sizeof(tmp)); 536 537 if (ret < 0) { 538 /* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */ 539 ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp); 540 if (ret_l6 == -ENODEV) { 541 /* no line6 device found continue showing the error */ 542 dev_err(&dev->dev, 543 "%s(): unable to retrieve number of sample rates (clock %d)\n", 544 __func__, clock); 545 goto err; 546 } 547 if (ret_l6 == 0) { 548 dev_info(&dev->dev, 549 "%s(): unable to retrieve number of sample rates: set it to a predefined value (clock %d).\n", 550 __func__, clock); 551 return 0; 552 } 553 ret = ret_l6; 554 goto err; 555 } 556 557 nr_triplets = (tmp[1] << 8) | tmp[0]; 558 data_size = 2 + 12 * nr_triplets; 559 data = kzalloc(data_size, GFP_KERNEL); 560 if (!data) { 561 ret = -ENOMEM; 562 goto err; 563 } 564 565 /* now get the full information */ 566 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE, 567 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, 568 UAC2_CS_CONTROL_SAM_FREQ << 8, 569 snd_usb_ctrl_intf(chip) | (clock << 8), 570 data, data_size); 571 572 if (ret < 0) { 573 dev_err(&dev->dev, 574 "%s(): unable to retrieve sample rate range (clock %d)\n", 575 __func__, clock); 576 ret = -EINVAL; 577 goto err_free; 578 } 579 580 /* Call the triplet parser, and make sure fp->rate_table is NULL. 581 * We just use the return value to know how many sample rates we 582 * will have to deal with. */ 583 kfree(fp->rate_table); 584 fp->rate_table = NULL; 585 fp->nr_rates = parse_uac2_sample_rate_range(chip, fp, nr_triplets, data); 586 587 if (fp->nr_rates == 0) { 588 /* SNDRV_PCM_RATE_CONTINUOUS */ 589 ret = 0; 590 goto err_free; 591 } 592 593 fp->rate_table = kmalloc_array(fp->nr_rates, sizeof(int), GFP_KERNEL); 594 if (!fp->rate_table) { 595 ret = -ENOMEM; 596 goto err_free; 597 } 598 599 /* Call the triplet parser again, but this time, fp->rate_table is 600 * allocated, so the rates will be stored */ 601 parse_uac2_sample_rate_range(chip, fp, nr_triplets, data); 602 603 ret = validate_sample_rate_table_v2v3(chip, fp, clock); 604 605 err_free: 606 kfree(data); 607 err: 608 return ret; 609 } 610 611 /* 612 * parse the format type I and III descriptors 613 */ 614 static int parse_audio_format_i(struct snd_usb_audio *chip, 615 struct audioformat *fp, u64 format, 616 void *_fmt) 617 { 618 snd_pcm_format_t pcm_format; 619 unsigned int fmt_type; 620 int ret; 621 622 switch (fp->protocol) { 623 default: 624 case UAC_VERSION_1: 625 case UAC_VERSION_2: { 626 struct uac_format_type_i_continuous_descriptor *fmt = _fmt; 627 628 fmt_type = fmt->bFormatType; 629 break; 630 } 631 case UAC_VERSION_3: { 632 /* fp->fmt_type is already set in this case */ 633 fmt_type = fp->fmt_type; 634 break; 635 } 636 } 637 638 if (fmt_type == UAC_FORMAT_TYPE_III) { 639 /* FIXME: the format type is really IECxxx 640 * but we give normal PCM format to get the existing 641 * apps working... 642 */ 643 switch (chip->usb_id) { 644 645 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */ 646 if (chip->setup == 0x00 && 647 fp->altsetting == 6) 648 pcm_format = SNDRV_PCM_FORMAT_S16_BE; 649 else 650 pcm_format = SNDRV_PCM_FORMAT_S16_LE; 651 break; 652 default: 653 pcm_format = SNDRV_PCM_FORMAT_S16_LE; 654 } 655 fp->formats = pcm_format_to_bits(pcm_format); 656 } else { 657 fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt); 658 if (!fp->formats) 659 return -EINVAL; 660 } 661 662 /* gather possible sample rates */ 663 /* audio class v1 reports possible sample rates as part of the 664 * proprietary class specific descriptor. 665 * audio class v2 uses class specific EP0 range requests for that. 666 */ 667 switch (fp->protocol) { 668 default: 669 case UAC_VERSION_1: { 670 struct uac_format_type_i_continuous_descriptor *fmt = _fmt; 671 672 fp->channels = fmt->bNrChannels; 673 ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7); 674 break; 675 } 676 case UAC_VERSION_2: 677 case UAC_VERSION_3: { 678 /* fp->channels is already set in this case */ 679 ret = parse_audio_format_rates_v2v3(chip, fp); 680 break; 681 } 682 } 683 684 if (fp->channels < 1) { 685 usb_audio_err(chip, 686 "%u:%d : invalid channels %d\n", 687 fp->iface, fp->altsetting, fp->channels); 688 return -EINVAL; 689 } 690 691 return ret; 692 } 693 694 /* 695 * parse the format type II descriptor 696 */ 697 static int parse_audio_format_ii(struct snd_usb_audio *chip, 698 struct audioformat *fp, 699 u64 format, void *_fmt) 700 { 701 int brate, framesize, ret; 702 703 switch (format) { 704 case UAC_FORMAT_TYPE_II_AC3: 705 /* FIXME: there is no AC3 format defined yet */ 706 // fp->formats = SNDRV_PCM_FMTBIT_AC3; 707 fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */ 708 break; 709 case UAC_FORMAT_TYPE_II_MPEG: 710 fp->formats = SNDRV_PCM_FMTBIT_MPEG; 711 break; 712 default: 713 usb_audio_info(chip, 714 "%u:%d : unknown format tag %#llx is detected. processed as MPEG.\n", 715 fp->iface, fp->altsetting, format); 716 fp->formats = SNDRV_PCM_FMTBIT_MPEG; 717 break; 718 } 719 720 fp->channels = 1; 721 722 switch (fp->protocol) { 723 default: 724 case UAC_VERSION_1: { 725 struct uac_format_type_ii_discrete_descriptor *fmt = _fmt; 726 brate = le16_to_cpu(fmt->wMaxBitRate); 727 framesize = le16_to_cpu(fmt->wSamplesPerFrame); 728 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize); 729 fp->frame_size = framesize; 730 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */ 731 break; 732 } 733 case UAC_VERSION_2: { 734 struct uac_format_type_ii_ext_descriptor *fmt = _fmt; 735 brate = le16_to_cpu(fmt->wMaxBitRate); 736 framesize = le16_to_cpu(fmt->wSamplesPerFrame); 737 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize); 738 fp->frame_size = framesize; 739 ret = parse_audio_format_rates_v2v3(chip, fp); 740 break; 741 } 742 } 743 744 return ret; 745 } 746 747 int snd_usb_parse_audio_format(struct snd_usb_audio *chip, 748 struct audioformat *fp, u64 format, 749 struct uac_format_type_i_continuous_descriptor *fmt, 750 int stream) 751 { 752 int err; 753 754 switch (fmt->bFormatType) { 755 case UAC_FORMAT_TYPE_I: 756 case UAC_FORMAT_TYPE_III: 757 err = parse_audio_format_i(chip, fp, format, fmt); 758 break; 759 case UAC_FORMAT_TYPE_II: 760 err = parse_audio_format_ii(chip, fp, format, fmt); 761 break; 762 default: 763 usb_audio_info(chip, 764 "%u:%d : format type %d is not supported yet\n", 765 fp->iface, fp->altsetting, 766 fmt->bFormatType); 767 return -ENOTSUPP; 768 } 769 fp->fmt_type = fmt->bFormatType; 770 if (err < 0) 771 return err; 772 #if 1 773 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */ 774 /* extigy apparently supports sample rates other than 48k 775 * but not in ordinary way. so we enable only 48k atm. 776 */ 777 if (chip->usb_id == USB_ID(0x041e, 0x3000) || 778 chip->usb_id == USB_ID(0x041e, 0x3020) || 779 chip->usb_id == USB_ID(0x041e, 0x3061)) { 780 if (fmt->bFormatType == UAC_FORMAT_TYPE_I && 781 fp->rates != SNDRV_PCM_RATE_48000 && 782 fp->rates != SNDRV_PCM_RATE_96000) 783 return -ENOTSUPP; 784 } 785 #endif 786 return 0; 787 } 788 789 int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip, 790 struct audioformat *fp, 791 struct uac3_as_header_descriptor *as, 792 int stream) 793 { 794 u64 format = le64_to_cpu(as->bmFormats); 795 int err; 796 797 /* 798 * Type I format bits are D0..D6 799 * This test works because type IV is not supported 800 */ 801 if (format & 0x7f) 802 fp->fmt_type = UAC_FORMAT_TYPE_I; 803 else 804 fp->fmt_type = UAC_FORMAT_TYPE_III; 805 806 err = parse_audio_format_i(chip, fp, format, as); 807 if (err < 0) 808 return err; 809 810 return 0; 811 } 812