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