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 /* clear special format bit to avoid "unsupported format" msg below */ 64 format &= ~UAC2_FORMAT_TYPE_I_RAW_DATA; 65 } 66 67 format <<= 1; 68 break; 69 } 70 case UAC_VERSION_3: { 71 struct uac3_as_header_descriptor *as = _fmt; 72 73 sample_width = as->bBitResolution; 74 sample_bytes = as->bSubslotSize; 75 76 if (format & UAC3_FORMAT_TYPE_I_RAW_DATA) { 77 pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL; 78 /* clear special format bit to avoid "unsupported format" msg below */ 79 format &= ~UAC3_FORMAT_TYPE_I_RAW_DATA; 80 } 81 82 format <<= 1; 83 break; 84 } 85 } 86 87 fp->fmt_bits = sample_width; 88 89 if ((pcm_formats == 0) && 90 (format == 0 || format == (1 << UAC_FORMAT_TYPE_I_UNDEFINED))) { 91 /* some devices don't define this correctly... */ 92 usb_audio_info(chip, "%u:%d : format type 0 is detected, processed as PCM\n", 93 fp->iface, fp->altsetting); 94 format = 1 << UAC_FORMAT_TYPE_I_PCM; 95 } 96 if (format & (1 << UAC_FORMAT_TYPE_I_PCM)) { 97 if (((chip->usb_id == USB_ID(0x0582, 0x0016)) || 98 /* Edirol SD-90 */ 99 (chip->usb_id == USB_ID(0x0582, 0x000c))) && 100 /* Roland SC-D70 */ 101 sample_width == 24 && sample_bytes == 2) 102 sample_bytes = 3; 103 else if (sample_width > sample_bytes * 8) { 104 usb_audio_info(chip, "%u:%d : sample bitwidth %d in over sample bytes %d\n", 105 fp->iface, fp->altsetting, 106 sample_width, sample_bytes); 107 } 108 /* check the format byte size */ 109 switch (sample_bytes) { 110 case 1: 111 pcm_formats |= SNDRV_PCM_FMTBIT_S8; 112 break; 113 case 2: 114 if (snd_usb_is_big_endian_format(chip, fp)) 115 pcm_formats |= SNDRV_PCM_FMTBIT_S16_BE; /* grrr, big endian!! */ 116 else 117 pcm_formats |= SNDRV_PCM_FMTBIT_S16_LE; 118 break; 119 case 3: 120 if (snd_usb_is_big_endian_format(chip, fp)) 121 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3BE; /* grrr, big endian!! */ 122 else 123 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3LE; 124 break; 125 case 4: 126 pcm_formats |= SNDRV_PCM_FMTBIT_S32_LE; 127 break; 128 default: 129 usb_audio_info(chip, 130 "%u:%d : unsupported sample bitwidth %d in %d bytes\n", 131 fp->iface, fp->altsetting, 132 sample_width, sample_bytes); 133 break; 134 } 135 } 136 if (format & (1 << UAC_FORMAT_TYPE_I_PCM8)) { 137 /* Dallas DS4201 workaround: it advertises U8 format, but really 138 supports S8. */ 139 if (chip->usb_id == USB_ID(0x04fa, 0x4201)) 140 pcm_formats |= SNDRV_PCM_FMTBIT_S8; 141 else 142 pcm_formats |= SNDRV_PCM_FMTBIT_U8; 143 } 144 if (format & (1 << UAC_FORMAT_TYPE_I_IEEE_FLOAT)) { 145 pcm_formats |= SNDRV_PCM_FMTBIT_FLOAT_LE; 146 } 147 if (format & (1 << UAC_FORMAT_TYPE_I_ALAW)) { 148 pcm_formats |= SNDRV_PCM_FMTBIT_A_LAW; 149 } 150 if (format & (1 << UAC_FORMAT_TYPE_I_MULAW)) { 151 pcm_formats |= SNDRV_PCM_FMTBIT_MU_LAW; 152 } 153 if (format & ~0x3f) { 154 usb_audio_info(chip, 155 "%u:%d : unsupported format bits %#llx\n", 156 fp->iface, fp->altsetting, format); 157 } 158 159 pcm_formats |= snd_usb_interface_dsd_format_quirks(chip, fp, sample_bytes); 160 161 return pcm_formats; 162 } 163 164 static int set_fixed_rate(struct audioformat *fp, int rate, int rate_bits) 165 { 166 kfree(fp->rate_table); 167 fp->rate_table = kmalloc(sizeof(int), GFP_KERNEL); 168 if (!fp->rate_table) 169 return -ENOMEM; 170 fp->nr_rates = 1; 171 fp->rate_min = rate; 172 fp->rate_max = rate; 173 fp->rates = rate_bits; 174 fp->rate_table[0] = rate; 175 return 0; 176 } 177 178 /* set up rate_min, rate_max and rates from the rate table */ 179 static void set_rate_table_min_max(struct audioformat *fp) 180 { 181 unsigned int rate; 182 int i; 183 184 fp->rate_min = INT_MAX; 185 fp->rate_max = 0; 186 fp->rates = 0; 187 for (i = 0; i < fp->nr_rates; i++) { 188 rate = fp->rate_table[i]; 189 fp->rate_min = min(fp->rate_min, rate); 190 fp->rate_max = max(fp->rate_max, rate); 191 fp->rates |= snd_pcm_rate_to_rate_bit(rate); 192 } 193 } 194 195 /* 196 * parse the format descriptor and stores the possible sample rates 197 * on the audioformat table (audio class v1). 198 * 199 * @dev: usb device 200 * @fp: audioformat record 201 * @fmt: the format descriptor 202 * @offset: the start offset of descriptor pointing the rate type 203 * (7 for type I and II, 8 for type II) 204 */ 205 static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audioformat *fp, 206 unsigned char *fmt, int offset) 207 { 208 int nr_rates = fmt[offset]; 209 210 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) { 211 usb_audio_err(chip, 212 "%u:%d : invalid UAC_FORMAT_TYPE desc\n", 213 fp->iface, fp->altsetting); 214 return -EINVAL; 215 } 216 217 if (nr_rates) { 218 /* 219 * build the rate table and bitmap flags 220 */ 221 int r, idx; 222 223 fp->rate_table = kmalloc_array(nr_rates, sizeof(int), 224 GFP_KERNEL); 225 if (fp->rate_table == NULL) 226 return -ENOMEM; 227 228 fp->nr_rates = 0; 229 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) { 230 unsigned int rate = combine_triple(&fmt[idx]); 231 if (!rate) 232 continue; 233 /* C-Media CM6501 mislabels its 96 kHz altsetting */ 234 /* Terratec Aureon 7.1 USB C-Media 6206, too */ 235 /* Ozone Z90 USB C-Media, too */ 236 if (rate == 48000 && nr_rates == 1 && 237 (chip->usb_id == USB_ID(0x0d8c, 0x0201) || 238 chip->usb_id == USB_ID(0x0d8c, 0x0102) || 239 chip->usb_id == USB_ID(0x0d8c, 0x0078) || 240 chip->usb_id == USB_ID(0x0ccd, 0x00b1)) && 241 fp->altsetting == 5 && fp->maxpacksize == 392) 242 rate = 96000; 243 /* Creative VF0420/VF0470 Live Cams report 16 kHz instead of 8kHz */ 244 if (rate == 16000 && 245 (chip->usb_id == USB_ID(0x041e, 0x4064) || 246 chip->usb_id == USB_ID(0x041e, 0x4068))) 247 rate = 8000; 248 249 fp->rate_table[fp->nr_rates++] = rate; 250 } 251 if (!fp->nr_rates) { 252 usb_audio_info(chip, 253 "%u:%d: All rates were zero\n", 254 fp->iface, fp->altsetting); 255 return -EINVAL; 256 } 257 set_rate_table_min_max(fp); 258 } else { 259 /* continuous rates */ 260 fp->rates = SNDRV_PCM_RATE_CONTINUOUS; 261 fp->rate_min = combine_triple(&fmt[offset + 1]); 262 fp->rate_max = combine_triple(&fmt[offset + 4]); 263 } 264 265 /* Jabra Evolve 65 headset */ 266 if (chip->usb_id == USB_ID(0x0b0e, 0x030b)) { 267 /* only 48kHz for playback while keeping 16kHz for capture */ 268 if (fp->nr_rates != 1) 269 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000); 270 } 271 272 return 0; 273 } 274 275 276 /* 277 * Presonus Studio 1810c supports a limited set of sampling 278 * rates per altsetting but reports the full set each time. 279 * If we don't filter out the unsupported rates and attempt 280 * to configure the card, it will hang refusing to do any 281 * further audio I/O until a hard reset is performed. 282 * 283 * The list of supported rates per altsetting (set of available 284 * I/O channels) is described in the owner's manual, section 2.2. 285 */ 286 static bool s1810c_valid_sample_rate(struct audioformat *fp, 287 unsigned int rate) 288 { 289 switch (fp->altsetting) { 290 case 1: 291 /* All ADAT ports available */ 292 return rate <= 48000; 293 case 2: 294 /* Half of ADAT ports available */ 295 return (rate == 88200 || rate == 96000); 296 case 3: 297 /* Analog I/O only (no S/PDIF nor ADAT) */ 298 return rate >= 176400; 299 default: 300 return false; 301 } 302 return false; 303 } 304 305 /* 306 * Many Focusrite devices supports a limited set of sampling rates per 307 * altsetting. Maximum rate is exposed in the last 4 bytes of Format Type 308 * descriptor which has a non-standard bLength = 10. 309 */ 310 static bool focusrite_valid_sample_rate(struct snd_usb_audio *chip, 311 struct audioformat *fp, 312 unsigned int rate) 313 { 314 struct usb_interface *iface; 315 struct usb_host_interface *alts; 316 unsigned char *fmt; 317 unsigned int max_rate; 318 319 iface = usb_ifnum_to_if(chip->dev, fp->iface); 320 if (!iface) 321 return true; 322 323 alts = &iface->altsetting[fp->altset_idx]; 324 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, 325 NULL, UAC_FORMAT_TYPE); 326 if (!fmt) 327 return true; 328 329 if (fmt[0] == 10) { /* bLength */ 330 max_rate = combine_quad(&fmt[6]); 331 332 /* Validate max rate */ 333 if (max_rate != 48000 && 334 max_rate != 96000 && 335 max_rate != 192000 && 336 max_rate != 384000) { 337 338 usb_audio_info(chip, 339 "%u:%d : unexpected max rate: %u\n", 340 fp->iface, fp->altsetting, max_rate); 341 342 return true; 343 } 344 345 return rate <= max_rate; 346 } 347 348 return true; 349 } 350 351 /* 352 * Helper function to walk the array of sample rate triplets reported by 353 * the device. The problem is that we need to parse whole array first to 354 * get to know how many sample rates we have to expect. 355 * Then fp->rate_table can be allocated and filled. 356 */ 357 static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip, 358 struct audioformat *fp, int nr_triplets, 359 const unsigned char *data) 360 { 361 int i, nr_rates = 0; 362 363 for (i = 0; i < nr_triplets; i++) { 364 int min = combine_quad(&data[2 + 12 * i]); 365 int max = combine_quad(&data[6 + 12 * i]); 366 int res = combine_quad(&data[10 + 12 * i]); 367 unsigned int rate; 368 369 if ((max < 0) || (min < 0) || (res < 0) || (max < min)) 370 continue; 371 372 /* 373 * for ranges with res == 1, we announce a continuous sample 374 * rate range, and this function should return 0 for no further 375 * parsing. 376 */ 377 if (res == 1) { 378 fp->rate_min = min; 379 fp->rate_max = max; 380 fp->rates = SNDRV_PCM_RATE_CONTINUOUS; 381 return 0; 382 } 383 384 for (rate = min; rate <= max; rate += res) { 385 386 /* Filter out invalid rates on Presonus Studio 1810c */ 387 if (chip->usb_id == USB_ID(0x194f, 0x010c) && 388 !s1810c_valid_sample_rate(fp, rate)) 389 goto skip_rate; 390 391 /* Filter out invalid rates on Focusrite devices */ 392 if (USB_ID_VENDOR(chip->usb_id) == 0x1235 && 393 !focusrite_valid_sample_rate(chip, fp, rate)) 394 goto skip_rate; 395 396 if (fp->rate_table) 397 fp->rate_table[nr_rates] = rate; 398 nr_rates++; 399 if (nr_rates >= MAX_NR_RATES) { 400 usb_audio_err(chip, "invalid uac2 rates\n"); 401 break; 402 } 403 404 skip_rate: 405 /* avoid endless loop */ 406 if (res == 0) 407 break; 408 } 409 } 410 411 return nr_rates; 412 } 413 414 /* Line6 Helix series and the Rode Rodecaster Pro don't support the 415 * UAC2_CS_RANGE usb function call. Return a static table of known 416 * clock rates. 417 */ 418 static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip, 419 struct audioformat *fp) 420 { 421 switch (chip->usb_id) { 422 case USB_ID(0x0e41, 0x4241): /* Line6 Helix */ 423 case USB_ID(0x0e41, 0x4242): /* Line6 Helix Rack */ 424 case USB_ID(0x0e41, 0x4244): /* Line6 Helix LT */ 425 case USB_ID(0x0e41, 0x4246): /* Line6 HX-Stomp */ 426 case USB_ID(0x0e41, 0x4253): /* Line6 HX-Stomp XL */ 427 case USB_ID(0x0e41, 0x4247): /* Line6 Pod Go */ 428 case USB_ID(0x0e41, 0x4248): /* Line6 Helix >= fw 2.82 */ 429 case USB_ID(0x0e41, 0x4249): /* Line6 Helix Rack >= fw 2.82 */ 430 case USB_ID(0x0e41, 0x424a): /* Line6 Helix LT >= fw 2.82 */ 431 case USB_ID(0x0e41, 0x424b): /* Line6 Pod Go */ 432 case USB_ID(0x19f7, 0x0011): /* Rode Rodecaster Pro */ 433 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000); 434 } 435 436 return -ENODEV; 437 } 438 439 /* check whether the given altsetting is supported for the already set rate */ 440 static bool check_valid_altsetting_v2v3(struct snd_usb_audio *chip, int iface, 441 int altsetting) 442 { 443 struct usb_device *dev = chip->dev; 444 __le64 raw_data = 0; 445 u64 data; 446 int err; 447 448 /* we assume 64bit is enough for any altsettings */ 449 if (snd_BUG_ON(altsetting >= 64 - 8)) 450 return false; 451 452 err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR, 453 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, 454 UAC2_AS_VAL_ALT_SETTINGS << 8, 455 iface, &raw_data, sizeof(raw_data)); 456 if (err < 0) 457 return false; 458 459 data = le64_to_cpu(raw_data); 460 /* first byte contains the bitmap size */ 461 if ((data & 0xff) * 8 < altsetting) 462 return false; 463 if (data & (1ULL << (altsetting + 8))) 464 return true; 465 466 return false; 467 } 468 469 /* 470 * Validate each sample rate with the altsetting 471 * Rebuild the rate table if only partial values are valid 472 */ 473 static int validate_sample_rate_table_v2v3(struct snd_usb_audio *chip, 474 struct audioformat *fp, 475 int clock) 476 { 477 struct usb_device *dev = chip->dev; 478 struct usb_host_interface *alts; 479 unsigned int *table; 480 unsigned int nr_rates; 481 int i, err; 482 u32 bmControls; 483 484 /* performing the rate verification may lead to unexpected USB bus 485 * behavior afterwards by some unknown reason. Do this only for the 486 * known devices. 487 */ 488 if (!(chip->quirk_flags & QUIRK_FLAG_VALIDATE_RATES)) 489 return 0; /* don't perform the validation as default */ 490 491 alts = snd_usb_get_host_interface(chip, fp->iface, fp->altsetting); 492 if (!alts) 493 return 0; 494 495 if (fp->protocol == UAC_VERSION_3) { 496 struct uac3_as_header_descriptor *as = snd_usb_find_csint_desc( 497 alts->extra, alts->extralen, NULL, UAC_AS_GENERAL); 498 bmControls = le32_to_cpu(as->bmControls); 499 } else { 500 struct uac2_as_header_descriptor *as = snd_usb_find_csint_desc( 501 alts->extra, alts->extralen, NULL, UAC_AS_GENERAL); 502 bmControls = as->bmControls; 503 } 504 505 if (!uac_v2v3_control_is_readable(bmControls, 506 UAC2_AS_VAL_ALT_SETTINGS)) 507 return 0; 508 509 table = kcalloc(fp->nr_rates, sizeof(*table), GFP_KERNEL); 510 if (!table) 511 return -ENOMEM; 512 513 /* clear the interface altsetting at first */ 514 usb_set_interface(dev, fp->iface, 0); 515 516 nr_rates = 0; 517 for (i = 0; i < fp->nr_rates; i++) { 518 err = snd_usb_set_sample_rate_v2v3(chip, fp, clock, 519 fp->rate_table[i]); 520 if (err < 0) 521 continue; 522 523 if (check_valid_altsetting_v2v3(chip, fp->iface, fp->altsetting)) 524 table[nr_rates++] = fp->rate_table[i]; 525 } 526 527 if (!nr_rates) { 528 usb_audio_dbg(chip, 529 "No valid sample rate available for %d:%d, assuming a firmware bug\n", 530 fp->iface, fp->altsetting); 531 nr_rates = fp->nr_rates; /* continue as is */ 532 } 533 534 if (fp->nr_rates == nr_rates) { 535 kfree(table); 536 return 0; 537 } 538 539 kfree(fp->rate_table); 540 fp->rate_table = table; 541 fp->nr_rates = nr_rates; 542 return 0; 543 } 544 545 /* 546 * parse the format descriptor and stores the possible sample rates 547 * on the audioformat table (audio class v2 and v3). 548 */ 549 static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip, 550 struct audioformat *fp) 551 { 552 struct usb_device *dev = chip->dev; 553 unsigned char tmp[2], *data; 554 int nr_triplets, data_size, ret = 0, ret_l6; 555 int clock = snd_usb_clock_find_source(chip, fp, false); 556 557 if (clock < 0) { 558 dev_err(&dev->dev, 559 "%s(): unable to find clock source (clock %d)\n", 560 __func__, clock); 561 goto err; 562 } 563 564 /* get the number of sample rates first by only fetching 2 bytes */ 565 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE, 566 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, 567 UAC2_CS_CONTROL_SAM_FREQ << 8, 568 snd_usb_ctrl_intf(chip) | (clock << 8), 569 tmp, sizeof(tmp)); 570 571 if (ret < 0) { 572 /* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */ 573 ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp); 574 if (ret_l6 == -ENODEV) { 575 /* no line6 device found continue showing the error */ 576 dev_err(&dev->dev, 577 "%s(): unable to retrieve number of sample rates (clock %d)\n", 578 __func__, clock); 579 goto err; 580 } 581 if (ret_l6 == 0) { 582 dev_info(&dev->dev, 583 "%s(): unable to retrieve number of sample rates: set it to a predefined value (clock %d).\n", 584 __func__, clock); 585 return 0; 586 } 587 ret = ret_l6; 588 goto err; 589 } 590 591 nr_triplets = (tmp[1] << 8) | tmp[0]; 592 data_size = 2 + 12 * nr_triplets; 593 data = kzalloc(data_size, GFP_KERNEL); 594 if (!data) { 595 ret = -ENOMEM; 596 goto err; 597 } 598 599 /* now get the full information */ 600 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE, 601 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, 602 UAC2_CS_CONTROL_SAM_FREQ << 8, 603 snd_usb_ctrl_intf(chip) | (clock << 8), 604 data, data_size); 605 606 if (ret < 0) { 607 dev_err(&dev->dev, 608 "%s(): unable to retrieve sample rate range (clock %d)\n", 609 __func__, clock); 610 ret = -EINVAL; 611 goto err_free; 612 } 613 614 /* Call the triplet parser, and make sure fp->rate_table is NULL. 615 * We just use the return value to know how many sample rates we 616 * will have to deal with. */ 617 kfree(fp->rate_table); 618 fp->rate_table = NULL; 619 fp->nr_rates = parse_uac2_sample_rate_range(chip, fp, nr_triplets, data); 620 621 if (fp->nr_rates == 0) { 622 /* SNDRV_PCM_RATE_CONTINUOUS */ 623 ret = 0; 624 goto err_free; 625 } 626 627 fp->rate_table = kmalloc_array(fp->nr_rates, sizeof(int), GFP_KERNEL); 628 if (!fp->rate_table) { 629 ret = -ENOMEM; 630 goto err_free; 631 } 632 633 /* Call the triplet parser again, but this time, fp->rate_table is 634 * allocated, so the rates will be stored */ 635 parse_uac2_sample_rate_range(chip, fp, nr_triplets, data); 636 637 ret = validate_sample_rate_table_v2v3(chip, fp, clock); 638 if (ret < 0) 639 goto err_free; 640 641 set_rate_table_min_max(fp); 642 643 err_free: 644 kfree(data); 645 err: 646 return ret; 647 } 648 649 /* 650 * parse the format type I and III descriptors 651 */ 652 static int parse_audio_format_i(struct snd_usb_audio *chip, 653 struct audioformat *fp, u64 format, 654 void *_fmt) 655 { 656 snd_pcm_format_t pcm_format; 657 unsigned int fmt_type; 658 int ret; 659 660 switch (fp->protocol) { 661 default: 662 case UAC_VERSION_1: 663 case UAC_VERSION_2: { 664 struct uac_format_type_i_continuous_descriptor *fmt = _fmt; 665 666 fmt_type = fmt->bFormatType; 667 break; 668 } 669 case UAC_VERSION_3: { 670 /* fp->fmt_type is already set in this case */ 671 fmt_type = fp->fmt_type; 672 break; 673 } 674 } 675 676 if (fmt_type == UAC_FORMAT_TYPE_III) { 677 /* FIXME: the format type is really IECxxx 678 * but we give normal PCM format to get the existing 679 * apps working... 680 */ 681 switch (chip->usb_id) { 682 683 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */ 684 if (chip->setup == 0x00 && 685 fp->altsetting == 6) 686 pcm_format = SNDRV_PCM_FORMAT_S16_BE; 687 else 688 pcm_format = SNDRV_PCM_FORMAT_S16_LE; 689 break; 690 default: 691 pcm_format = SNDRV_PCM_FORMAT_S16_LE; 692 } 693 fp->formats = pcm_format_to_bits(pcm_format); 694 } else { 695 fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt); 696 if (!fp->formats) 697 return -EINVAL; 698 } 699 700 /* gather possible sample rates */ 701 /* audio class v1 reports possible sample rates as part of the 702 * proprietary class specific descriptor. 703 * audio class v2 uses class specific EP0 range requests for that. 704 */ 705 switch (fp->protocol) { 706 default: 707 case UAC_VERSION_1: { 708 struct uac_format_type_i_continuous_descriptor *fmt = _fmt; 709 710 fp->channels = fmt->bNrChannels; 711 ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7); 712 break; 713 } 714 case UAC_VERSION_2: 715 case UAC_VERSION_3: { 716 /* fp->channels is already set in this case */ 717 ret = parse_audio_format_rates_v2v3(chip, fp); 718 break; 719 } 720 } 721 722 if (fp->channels < 1) { 723 usb_audio_err(chip, 724 "%u:%d : invalid channels %d\n", 725 fp->iface, fp->altsetting, fp->channels); 726 return -EINVAL; 727 } 728 729 return ret; 730 } 731 732 /* 733 * parse the format type II descriptor 734 */ 735 static int parse_audio_format_ii(struct snd_usb_audio *chip, 736 struct audioformat *fp, 737 u64 format, void *_fmt) 738 { 739 int brate, framesize, ret; 740 741 switch (format) { 742 case UAC_FORMAT_TYPE_II_AC3: 743 /* FIXME: there is no AC3 format defined yet */ 744 // fp->formats = SNDRV_PCM_FMTBIT_AC3; 745 fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */ 746 break; 747 case UAC_FORMAT_TYPE_II_MPEG: 748 fp->formats = SNDRV_PCM_FMTBIT_MPEG; 749 break; 750 default: 751 usb_audio_info(chip, 752 "%u:%d : unknown format tag %#llx is detected. processed as MPEG.\n", 753 fp->iface, fp->altsetting, format); 754 fp->formats = SNDRV_PCM_FMTBIT_MPEG; 755 break; 756 } 757 758 fp->channels = 1; 759 760 switch (fp->protocol) { 761 default: 762 case UAC_VERSION_1: { 763 struct uac_format_type_ii_discrete_descriptor *fmt = _fmt; 764 brate = le16_to_cpu(fmt->wMaxBitRate); 765 framesize = le16_to_cpu(fmt->wSamplesPerFrame); 766 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize); 767 fp->frame_size = framesize; 768 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */ 769 break; 770 } 771 case UAC_VERSION_2: { 772 struct uac_format_type_ii_ext_descriptor *fmt = _fmt; 773 brate = le16_to_cpu(fmt->wMaxBitRate); 774 framesize = le16_to_cpu(fmt->wSamplesPerFrame); 775 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize); 776 fp->frame_size = framesize; 777 ret = parse_audio_format_rates_v2v3(chip, fp); 778 break; 779 } 780 } 781 782 return ret; 783 } 784 785 int snd_usb_parse_audio_format(struct snd_usb_audio *chip, 786 struct audioformat *fp, u64 format, 787 struct uac_format_type_i_continuous_descriptor *fmt, 788 int stream) 789 { 790 int err; 791 792 switch (fmt->bFormatType) { 793 case UAC_FORMAT_TYPE_I: 794 case UAC_FORMAT_TYPE_III: 795 err = parse_audio_format_i(chip, fp, format, fmt); 796 break; 797 case UAC_FORMAT_TYPE_II: 798 err = parse_audio_format_ii(chip, fp, format, fmt); 799 break; 800 default: 801 usb_audio_info(chip, 802 "%u:%d : format type %d is not supported yet\n", 803 fp->iface, fp->altsetting, 804 fmt->bFormatType); 805 return -ENOTSUPP; 806 } 807 fp->fmt_type = fmt->bFormatType; 808 if (err < 0) 809 return err; 810 #if 1 811 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */ 812 /* extigy apparently supports sample rates other than 48k 813 * but not in ordinary way. so we enable only 48k atm. 814 */ 815 if (chip->usb_id == USB_ID(0x041e, 0x3000) || 816 chip->usb_id == USB_ID(0x041e, 0x3020) || 817 chip->usb_id == USB_ID(0x041e, 0x3061)) { 818 if (fmt->bFormatType == UAC_FORMAT_TYPE_I && 819 fp->rates != SNDRV_PCM_RATE_48000 && 820 fp->rates != SNDRV_PCM_RATE_96000) 821 return -ENOTSUPP; 822 } 823 #endif 824 return 0; 825 } 826 827 int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip, 828 struct audioformat *fp, 829 struct uac3_as_header_descriptor *as, 830 int stream) 831 { 832 u64 format = le64_to_cpu(as->bmFormats); 833 int err; 834 835 /* 836 * Type I format bits are D0..D6 837 * This test works because type IV is not supported 838 */ 839 if (format & 0x7f) 840 fp->fmt_type = UAC_FORMAT_TYPE_I; 841 else 842 fp->fmt_type = UAC_FORMAT_TYPE_III; 843 844 err = parse_audio_format_i(chip, fp, format, as); 845 if (err < 0) 846 return err; 847 848 return 0; 849 } 850