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 chip->usb_id == USB_ID(0x0b0e, 0x030c)) { 265 /* only 48kHz for playback while keeping 16kHz for capture */ 266 if (fp->nr_rates != 1) 267 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000); 268 } 269 270 return 0; 271 } 272 273 274 /* 275 * Presonus Studio 1810c supports a limited set of sampling 276 * rates per altsetting but reports the full set each time. 277 * If we don't filter out the unsupported rates and attempt 278 * to configure the card, it will hang refusing to do any 279 * further audio I/O until a hard reset is performed. 280 * 281 * The list of supported rates per altsetting (set of available 282 * I/O channels) is described in the owner's manual, section 2.2. 283 */ 284 static bool s1810c_valid_sample_rate(struct audioformat *fp, 285 unsigned int rate) 286 { 287 switch (fp->altsetting) { 288 case 1: 289 /* All ADAT ports available */ 290 return rate <= 48000; 291 case 2: 292 /* Half of ADAT ports available */ 293 return (rate == 88200 || rate == 96000); 294 case 3: 295 /* Analog I/O only (no S/PDIF nor ADAT) */ 296 return rate >= 176400; 297 default: 298 return false; 299 } 300 return false; 301 } 302 303 /* 304 * Many Focusrite devices supports a limited set of sampling rates per 305 * altsetting. Maximum rate is exposed in the last 4 bytes of Format Type 306 * descriptor which has a non-standard bLength = 10. 307 */ 308 static bool focusrite_valid_sample_rate(struct snd_usb_audio *chip, 309 struct audioformat *fp, 310 unsigned int rate) 311 { 312 struct usb_interface *iface; 313 struct usb_host_interface *alts; 314 unsigned char *fmt; 315 unsigned int max_rate; 316 317 iface = usb_ifnum_to_if(chip->dev, fp->iface); 318 if (!iface) 319 return true; 320 321 alts = &iface->altsetting[fp->altset_idx]; 322 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, 323 NULL, UAC_FORMAT_TYPE); 324 if (!fmt) 325 return true; 326 327 if (fmt[0] == 10) { /* bLength */ 328 max_rate = combine_quad(&fmt[6]); 329 330 /* Validate max rate */ 331 if (max_rate != 48000 && 332 max_rate != 96000 && 333 max_rate != 192000 && 334 max_rate != 384000) { 335 336 usb_audio_info(chip, 337 "%u:%d : unexpected max rate: %u\n", 338 fp->iface, fp->altsetting, max_rate); 339 340 return true; 341 } 342 343 return rate <= max_rate; 344 } 345 346 return true; 347 } 348 349 /* 350 * Helper function to walk the array of sample rate triplets reported by 351 * the device. The problem is that we need to parse whole array first to 352 * get to know how many sample rates we have to expect. 353 * Then fp->rate_table can be allocated and filled. 354 */ 355 static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip, 356 struct audioformat *fp, int nr_triplets, 357 const unsigned char *data) 358 { 359 int i, nr_rates = 0; 360 361 for (i = 0; i < nr_triplets; i++) { 362 int min = combine_quad(&data[2 + 12 * i]); 363 int max = combine_quad(&data[6 + 12 * i]); 364 int res = combine_quad(&data[10 + 12 * i]); 365 unsigned int rate; 366 367 if ((max < 0) || (min < 0) || (res < 0) || (max < min)) 368 continue; 369 370 /* 371 * for ranges with res == 1, we announce a continuous sample 372 * rate range, and this function should return 0 for no further 373 * parsing. 374 */ 375 if (res == 1) { 376 fp->rate_min = min; 377 fp->rate_max = max; 378 fp->rates = SNDRV_PCM_RATE_CONTINUOUS; 379 return 0; 380 } 381 382 for (rate = min; rate <= max; rate += res) { 383 384 /* Filter out invalid rates on Presonus Studio 1810c */ 385 if (chip->usb_id == USB_ID(0x194f, 0x010c) && 386 !s1810c_valid_sample_rate(fp, rate)) 387 goto skip_rate; 388 /* Filter out invalid rates on Presonus Studio 1824c */ 389 if (chip->usb_id == USB_ID(0x194f, 0x010d) && 390 !s1810c_valid_sample_rate(fp, rate)) 391 goto skip_rate; 392 393 /* Filter out invalid rates on Focusrite devices */ 394 if (USB_ID_VENDOR(chip->usb_id) == 0x1235 && 395 !focusrite_valid_sample_rate(chip, fp, rate)) 396 goto skip_rate; 397 398 if (fp->rate_table) 399 fp->rate_table[nr_rates] = rate; 400 nr_rates++; 401 if (nr_rates >= MAX_NR_RATES) { 402 usb_audio_err(chip, "invalid uac2 rates\n"); 403 break; 404 } 405 406 skip_rate: 407 /* avoid endless loop */ 408 if (res == 0) 409 break; 410 } 411 } 412 413 return nr_rates; 414 } 415 416 /* Line6 Helix series and the Rode Rodecaster Pro don't support the 417 * UAC2_CS_RANGE usb function call. Return a static table of known 418 * clock rates. 419 */ 420 static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip, 421 struct audioformat *fp) 422 { 423 switch (chip->usb_id) { 424 case USB_ID(0x0e41, 0x4241): /* Line6 Helix */ 425 case USB_ID(0x0e41, 0x4242): /* Line6 Helix Rack */ 426 case USB_ID(0x0e41, 0x4244): /* Line6 Helix LT */ 427 case USB_ID(0x0e41, 0x4246): /* Line6 HX-Stomp */ 428 case USB_ID(0x0e41, 0x4253): /* Line6 HX-Stomp XL */ 429 case USB_ID(0x0e41, 0x4247): /* Line6 Pod Go */ 430 case USB_ID(0x0e41, 0x4248): /* Line6 Helix >= fw 2.82 */ 431 case USB_ID(0x0e41, 0x4249): /* Line6 Helix Rack >= fw 2.82 */ 432 case USB_ID(0x0e41, 0x424a): /* Line6 Helix LT >= fw 2.82 */ 433 case USB_ID(0x0e41, 0x424b): /* Line6 Pod Go */ 434 case USB_ID(0x19f7, 0x0011): /* Rode Rodecaster Pro */ 435 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000); 436 } 437 438 return -ENODEV; 439 } 440 441 /* check whether the given altsetting is supported for the already set rate */ 442 static bool check_valid_altsetting_v2v3(struct snd_usb_audio *chip, int iface, 443 int altsetting) 444 { 445 struct usb_device *dev = chip->dev; 446 __le64 raw_data = 0; 447 u64 data; 448 int err; 449 450 /* we assume 64bit is enough for any altsettings */ 451 if (snd_BUG_ON(altsetting >= 64 - 8)) 452 return false; 453 454 err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR, 455 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, 456 UAC2_AS_VAL_ALT_SETTINGS << 8, 457 iface, &raw_data, sizeof(raw_data)); 458 if (err < 0) 459 return false; 460 461 data = le64_to_cpu(raw_data); 462 /* first byte contains the bitmap size */ 463 if ((data & 0xff) * 8 < altsetting) 464 return false; 465 if (data & (1ULL << (altsetting + 8))) 466 return true; 467 468 return false; 469 } 470 471 /* 472 * Validate each sample rate with the altsetting 473 * Rebuild the rate table if only partial values are valid 474 */ 475 static int validate_sample_rate_table_v2v3(struct snd_usb_audio *chip, 476 struct audioformat *fp, 477 int clock) 478 { 479 struct usb_device *dev = chip->dev; 480 struct usb_host_interface *alts; 481 unsigned int *table; 482 unsigned int nr_rates; 483 int i, err; 484 u32 bmControls; 485 486 /* performing the rate verification may lead to unexpected USB bus 487 * behavior afterwards by some unknown reason. Do this only for the 488 * known devices. 489 */ 490 if (!(chip->quirk_flags & QUIRK_FLAG_VALIDATE_RATES)) 491 return 0; /* don't perform the validation as default */ 492 493 alts = snd_usb_get_host_interface(chip, fp->iface, fp->altsetting); 494 if (!alts) 495 return 0; 496 497 if (fp->protocol == UAC_VERSION_3) { 498 struct uac3_as_header_descriptor *as = snd_usb_find_csint_desc( 499 alts->extra, alts->extralen, NULL, UAC_AS_GENERAL); 500 bmControls = le32_to_cpu(as->bmControls); 501 } else { 502 struct uac2_as_header_descriptor *as = snd_usb_find_csint_desc( 503 alts->extra, alts->extralen, NULL, UAC_AS_GENERAL); 504 bmControls = as->bmControls; 505 } 506 507 if (!uac_v2v3_control_is_readable(bmControls, 508 UAC2_AS_VAL_ALT_SETTINGS)) 509 return 0; 510 511 table = kcalloc(fp->nr_rates, sizeof(*table), GFP_KERNEL); 512 if (!table) 513 return -ENOMEM; 514 515 /* clear the interface altsetting at first */ 516 usb_set_interface(dev, fp->iface, 0); 517 518 nr_rates = 0; 519 for (i = 0; i < fp->nr_rates; i++) { 520 err = snd_usb_set_sample_rate_v2v3(chip, fp, clock, 521 fp->rate_table[i]); 522 if (err < 0) 523 continue; 524 525 if (check_valid_altsetting_v2v3(chip, fp->iface, fp->altsetting)) 526 table[nr_rates++] = fp->rate_table[i]; 527 } 528 529 if (!nr_rates) { 530 usb_audio_dbg(chip, 531 "No valid sample rate available for %d:%d, assuming a firmware bug\n", 532 fp->iface, fp->altsetting); 533 nr_rates = fp->nr_rates; /* continue as is */ 534 } 535 536 if (fp->nr_rates == nr_rates) { 537 kfree(table); 538 return 0; 539 } 540 541 kfree(fp->rate_table); 542 fp->rate_table = table; 543 fp->nr_rates = nr_rates; 544 return 0; 545 } 546 547 /* 548 * parse the format descriptor and stores the possible sample rates 549 * on the audioformat table (audio class v2 and v3). 550 */ 551 static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip, 552 struct audioformat *fp) 553 { 554 struct usb_device *dev = chip->dev; 555 unsigned char tmp[2], *data; 556 int nr_triplets, data_size, ret = 0, ret_l6; 557 int clock = snd_usb_clock_find_source(chip, fp, false); 558 struct usb_host_interface *ctrl_intf; 559 560 ctrl_intf = snd_usb_find_ctrl_interface(chip, fp->iface); 561 if (clock < 0) { 562 dev_err(&dev->dev, 563 "%s(): unable to find clock source (clock %d)\n", 564 __func__, clock); 565 goto err; 566 } 567 568 /* get the number of sample rates first by only fetching 2 bytes */ 569 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE, 570 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, 571 UAC2_CS_CONTROL_SAM_FREQ << 8, 572 snd_usb_ctrl_intf(ctrl_intf) | (clock << 8), 573 tmp, sizeof(tmp)); 574 575 if (ret < 0) { 576 /* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */ 577 ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp); 578 if (ret_l6 == -ENODEV) { 579 /* no line6 device found continue showing the error */ 580 dev_err(&dev->dev, 581 "%s(): unable to retrieve number of sample rates (clock %d)\n", 582 __func__, clock); 583 goto err; 584 } 585 if (ret_l6 == 0) { 586 dev_info(&dev->dev, 587 "%s(): unable to retrieve number of sample rates: set it to a predefined value (clock %d).\n", 588 __func__, clock); 589 return 0; 590 } 591 ret = ret_l6; 592 goto err; 593 } 594 595 nr_triplets = (tmp[1] << 8) | tmp[0]; 596 data_size = 2 + 12 * nr_triplets; 597 data = kzalloc(data_size, GFP_KERNEL); 598 if (!data) { 599 ret = -ENOMEM; 600 goto err; 601 } 602 603 /* now get the full information */ 604 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE, 605 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, 606 UAC2_CS_CONTROL_SAM_FREQ << 8, 607 snd_usb_ctrl_intf(ctrl_intf) | (clock << 8), 608 data, data_size); 609 610 if (ret < 0) { 611 dev_err(&dev->dev, 612 "%s(): unable to retrieve sample rate range (clock %d)\n", 613 __func__, clock); 614 ret = -EINVAL; 615 goto err_free; 616 } 617 618 /* Call the triplet parser, and make sure fp->rate_table is NULL. 619 * We just use the return value to know how many sample rates we 620 * will have to deal with. */ 621 kfree(fp->rate_table); 622 fp->rate_table = NULL; 623 fp->nr_rates = parse_uac2_sample_rate_range(chip, fp, nr_triplets, data); 624 625 if (fp->nr_rates == 0) { 626 /* SNDRV_PCM_RATE_CONTINUOUS */ 627 ret = 0; 628 goto err_free; 629 } 630 631 fp->rate_table = kmalloc_array(fp->nr_rates, sizeof(int), GFP_KERNEL); 632 if (!fp->rate_table) { 633 ret = -ENOMEM; 634 goto err_free; 635 } 636 637 /* Call the triplet parser again, but this time, fp->rate_table is 638 * allocated, so the rates will be stored */ 639 parse_uac2_sample_rate_range(chip, fp, nr_triplets, data); 640 641 ret = validate_sample_rate_table_v2v3(chip, fp, clock); 642 if (ret < 0) 643 goto err_free; 644 645 set_rate_table_min_max(fp); 646 647 err_free: 648 kfree(data); 649 err: 650 return ret; 651 } 652 653 /* 654 * parse the format type I and III descriptors 655 */ 656 static int parse_audio_format_i(struct snd_usb_audio *chip, 657 struct audioformat *fp, u64 format, 658 void *_fmt) 659 { 660 snd_pcm_format_t pcm_format; 661 unsigned int fmt_type; 662 int ret; 663 664 switch (fp->protocol) { 665 default: 666 case UAC_VERSION_1: 667 case UAC_VERSION_2: { 668 struct uac_format_type_i_continuous_descriptor *fmt = _fmt; 669 670 fmt_type = fmt->bFormatType; 671 break; 672 } 673 case UAC_VERSION_3: { 674 /* fp->fmt_type is already set in this case */ 675 fmt_type = fp->fmt_type; 676 break; 677 } 678 } 679 680 if (fmt_type == UAC_FORMAT_TYPE_III) { 681 /* FIXME: the format type is really IECxxx 682 * but we give normal PCM format to get the existing 683 * apps working... 684 */ 685 switch (chip->usb_id) { 686 687 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */ 688 if (chip->setup == 0x00 && 689 fp->altsetting == 6) 690 pcm_format = SNDRV_PCM_FORMAT_S16_BE; 691 else 692 pcm_format = SNDRV_PCM_FORMAT_S16_LE; 693 break; 694 default: 695 pcm_format = SNDRV_PCM_FORMAT_S16_LE; 696 } 697 fp->formats = pcm_format_to_bits(pcm_format); 698 } else { 699 fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt); 700 if (!fp->formats) 701 return -EINVAL; 702 } 703 704 /* gather possible sample rates */ 705 /* audio class v1 reports possible sample rates as part of the 706 * proprietary class specific descriptor. 707 * audio class v2 uses class specific EP0 range requests for that. 708 */ 709 switch (fp->protocol) { 710 default: 711 case UAC_VERSION_1: { 712 struct uac_format_type_i_continuous_descriptor *fmt = _fmt; 713 714 fp->channels = fmt->bNrChannels; 715 ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7); 716 break; 717 } 718 case UAC_VERSION_2: 719 case UAC_VERSION_3: { 720 /* fp->channels is already set in this case */ 721 ret = parse_audio_format_rates_v2v3(chip, fp); 722 break; 723 } 724 } 725 726 if (fp->channels < 1) { 727 usb_audio_err(chip, 728 "%u:%d : invalid channels %d\n", 729 fp->iface, fp->altsetting, fp->channels); 730 return -EINVAL; 731 } 732 733 return ret; 734 } 735 736 /* 737 * parse the format type II descriptor 738 */ 739 static int parse_audio_format_ii(struct snd_usb_audio *chip, 740 struct audioformat *fp, 741 u64 format, void *_fmt) 742 { 743 int brate, framesize, ret; 744 745 switch (format) { 746 case UAC_FORMAT_TYPE_II_AC3: 747 /* FIXME: there is no AC3 format defined yet */ 748 // fp->formats = SNDRV_PCM_FMTBIT_AC3; 749 fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */ 750 break; 751 case UAC_FORMAT_TYPE_II_MPEG: 752 fp->formats = SNDRV_PCM_FMTBIT_MPEG; 753 break; 754 default: 755 usb_audio_info(chip, 756 "%u:%d : unknown format tag %#llx is detected. processed as MPEG.\n", 757 fp->iface, fp->altsetting, format); 758 fp->formats = SNDRV_PCM_FMTBIT_MPEG; 759 break; 760 } 761 762 fp->channels = 1; 763 764 switch (fp->protocol) { 765 default: 766 case UAC_VERSION_1: { 767 struct uac_format_type_ii_discrete_descriptor *fmt = _fmt; 768 brate = le16_to_cpu(fmt->wMaxBitRate); 769 framesize = le16_to_cpu(fmt->wSamplesPerFrame); 770 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize); 771 fp->frame_size = framesize; 772 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */ 773 break; 774 } 775 case UAC_VERSION_2: { 776 struct uac_format_type_ii_ext_descriptor *fmt = _fmt; 777 brate = le16_to_cpu(fmt->wMaxBitRate); 778 framesize = le16_to_cpu(fmt->wSamplesPerFrame); 779 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize); 780 fp->frame_size = framesize; 781 ret = parse_audio_format_rates_v2v3(chip, fp); 782 break; 783 } 784 } 785 786 return ret; 787 } 788 789 int snd_usb_parse_audio_format(struct snd_usb_audio *chip, 790 struct audioformat *fp, u64 format, 791 struct uac_format_type_i_continuous_descriptor *fmt, 792 int stream) 793 { 794 int err; 795 796 switch (fmt->bFormatType) { 797 case UAC_FORMAT_TYPE_I: 798 case UAC_FORMAT_TYPE_III: 799 err = parse_audio_format_i(chip, fp, format, fmt); 800 break; 801 case UAC_FORMAT_TYPE_II: 802 err = parse_audio_format_ii(chip, fp, format, fmt); 803 break; 804 default: 805 usb_audio_info(chip, 806 "%u:%d : format type %d is not supported yet\n", 807 fp->iface, fp->altsetting, 808 fmt->bFormatType); 809 return -ENOTSUPP; 810 } 811 fp->fmt_type = fmt->bFormatType; 812 if (err < 0) 813 return err; 814 #if 1 815 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */ 816 /* extigy apparently supports sample rates other than 48k 817 * but not in ordinary way. so we enable only 48k atm. 818 */ 819 if (chip->usb_id == USB_ID(0x041e, 0x3000) || 820 chip->usb_id == USB_ID(0x041e, 0x3020) || 821 chip->usb_id == USB_ID(0x041e, 0x3061)) { 822 if (fmt->bFormatType == UAC_FORMAT_TYPE_I && 823 fp->rates != SNDRV_PCM_RATE_48000 && 824 fp->rates != SNDRV_PCM_RATE_96000) 825 return -ENOTSUPP; 826 } 827 #endif 828 return 0; 829 } 830 831 int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip, 832 struct audioformat *fp, 833 struct uac3_as_header_descriptor *as, 834 int stream) 835 { 836 u64 format = le64_to_cpu(as->bmFormats); 837 int err; 838 839 /* 840 * Type I format bits are D0..D6 841 * This test works because type IV is not supported 842 */ 843 if (format & 0x7f) 844 fp->fmt_type = UAC_FORMAT_TYPE_I; 845 else 846 fp->fmt_type = UAC_FORMAT_TYPE_III; 847 848 err = parse_audio_format_i(chip, fp, format, as); 849 if (err < 0) 850 return err; 851 852 return 0; 853 } 854