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1// SPDX-License-Identifier: GPL-2.0-or-later2/*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 descriptor24 * and returns the corresponding pcm format25 *26 * @dev: usb device27 * @fp: audioformat record28 * @format: the format tag (wFormatTag)29 * @fmt: the format type descriptor (v1/v2) or AudioStreaming descriptor (v3)30 */31static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,32 struct audioformat *fp,33 u64 format, void *_fmt)34{35 int sample_width, sample_bytes;36 u64 pcm_formats = 0;37 38 switch (fp->protocol) {39 case UAC_VERSION_1:40 default: {41 struct uac_format_type_i_discrete_descriptor *fmt = _fmt;42 if (format >= 64) {43 usb_audio_info(chip,44 "%u:%d: invalid format type 0x%llx is detected, processed as PCM\n",45 fp->iface, fp->altsetting, format);46 format = UAC_FORMAT_TYPE_I_PCM;47 }48 sample_width = fmt->bBitResolution;49 sample_bytes = fmt->bSubframeSize;50 format = 1ULL << format;51 break;52 }53 54 case UAC_VERSION_2: {55 struct uac_format_type_i_ext_descriptor *fmt = _fmt;56 sample_width = fmt->bBitResolution;57 sample_bytes = fmt->bSubslotSize;58 59 if (format & UAC2_FORMAT_TYPE_I_RAW_DATA) {60 pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;61 /* flag potentially raw DSD capable altsettings */62 fp->dsd_raw = true;63 }64 65 format <<= 1;66 break;67 }68 case UAC_VERSION_3: {69 struct uac3_as_header_descriptor *as = _fmt;70 71 sample_width = as->bBitResolution;72 sample_bytes = as->bSubslotSize;73 74 if (format & UAC3_FORMAT_TYPE_I_RAW_DATA)75 pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;76 77 format <<= 1;78 break;79 }80 }81 82 fp->fmt_bits = sample_width;83 84 if ((pcm_formats == 0) &&85 (format == 0 || format == BIT(UAC_FORMAT_TYPE_I_UNDEFINED))) {86 /* some devices don't define this correctly... */87 usb_audio_info(chip, "%u:%d : format type 0 is detected, processed as PCM\n",88 fp->iface, fp->altsetting);89 format = BIT(UAC_FORMAT_TYPE_I_PCM);90 }91 if (format & BIT(UAC_FORMAT_TYPE_I_PCM)) {92 if (((chip->usb_id == USB_ID(0x0582, 0x0016)) ||93 /* Edirol SD-90 */94 (chip->usb_id == USB_ID(0x0582, 0x000c))) &&95 /* Roland SC-D70 */96 sample_width == 24 && sample_bytes == 2)97 sample_bytes = 3;98 else if (sample_width > sample_bytes * 8) {99 usb_audio_info(chip, "%u:%d : sample bitwidth %d in over sample bytes %d\n",100 fp->iface, fp->altsetting,101 sample_width, sample_bytes);102 }103 /* check the format byte size */104 switch (sample_bytes) {105 case 1:106 pcm_formats |= SNDRV_PCM_FMTBIT_S8;107 break;108 case 2:109 if (snd_usb_is_big_endian_format(chip, fp))110 pcm_formats |= SNDRV_PCM_FMTBIT_S16_BE; /* grrr, big endian!! */111 else112 pcm_formats |= SNDRV_PCM_FMTBIT_S16_LE;113 break;114 case 3:115 if (snd_usb_is_big_endian_format(chip, fp))116 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3BE; /* grrr, big endian!! */117 else118 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3LE;119 break;120 case 4:121 pcm_formats |= SNDRV_PCM_FMTBIT_S32_LE;122 break;123 default:124 usb_audio_info(chip,125 "%u:%d : unsupported sample bitwidth %d in %d bytes\n",126 fp->iface, fp->altsetting,127 sample_width, sample_bytes);128 break;129 }130 }131 if (format & BIT(UAC_FORMAT_TYPE_I_PCM8)) {132 /* Dallas DS4201 workaround: it advertises U8 format, but really133 supports S8. */134 if (chip->usb_id == USB_ID(0x04fa, 0x4201))135 pcm_formats |= SNDRV_PCM_FMTBIT_S8;136 else137 pcm_formats |= SNDRV_PCM_FMTBIT_U8;138 }139 if (format & BIT(UAC_FORMAT_TYPE_I_IEEE_FLOAT))140 pcm_formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;141 if (format & BIT(UAC_FORMAT_TYPE_I_ALAW))142 pcm_formats |= SNDRV_PCM_FMTBIT_A_LAW;143 if (format & BIT(UAC_FORMAT_TYPE_I_MULAW))144 pcm_formats |= SNDRV_PCM_FMTBIT_MU_LAW;145 if (format & ~0x3f) {146 usb_audio_info(chip,147 "%u:%d : unsupported format bits %#llx\n",148 fp->iface, fp->altsetting, format);149 }150 151 pcm_formats |= snd_usb_interface_dsd_format_quirks(chip, fp, sample_bytes);152 153 return pcm_formats;154}155 156static int set_fixed_rate(struct audioformat *fp, int rate, int rate_bits)157{158 kfree(fp->rate_table);159 fp->rate_table = kmalloc(sizeof(int), GFP_KERNEL);160 if (!fp->rate_table)161 return -ENOMEM;162 fp->nr_rates = 1;163 fp->rate_min = rate;164 fp->rate_max = rate;165 fp->rates = rate_bits;166 fp->rate_table[0] = rate;167 return 0;168}169 170/* set up rate_min, rate_max and rates from the rate table */171static void set_rate_table_min_max(struct audioformat *fp)172{173 unsigned int rate;174 int i;175 176 fp->rate_min = INT_MAX;177 fp->rate_max = 0;178 fp->rates = 0;179 for (i = 0; i < fp->nr_rates; i++) {180 rate = fp->rate_table[i];181 fp->rate_min = min(fp->rate_min, rate);182 fp->rate_max = max(fp->rate_max, rate);183 fp->rates |= snd_pcm_rate_to_rate_bit(rate);184 }185}186 187/*188 * parse the format descriptor and stores the possible sample rates189 * on the audioformat table (audio class v1).190 *191 * @dev: usb device192 * @fp: audioformat record193 * @fmt: the format descriptor194 * @offset: the start offset of descriptor pointing the rate type195 * (7 for type I and II, 8 for type II)196 */197static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audioformat *fp,198 unsigned char *fmt, int offset)199{200 int nr_rates = fmt[offset];201 202 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {203 usb_audio_err(chip,204 "%u:%d : invalid UAC_FORMAT_TYPE desc\n",205 fp->iface, fp->altsetting);206 return -EINVAL;207 }208 209 if (nr_rates) {210 /*211 * build the rate table and bitmap flags212 */213 int r, idx;214 215 fp->rate_table = kmalloc_array(nr_rates, sizeof(int),216 GFP_KERNEL);217 if (fp->rate_table == NULL)218 return -ENOMEM;219 220 fp->nr_rates = 0;221 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {222 unsigned int rate = combine_triple(&fmt[idx]);223 if (!rate)224 continue;225 /* C-Media CM6501 mislabels its 96 kHz altsetting */226 /* Terratec Aureon 7.1 USB C-Media 6206, too */227 /* Ozone Z90 USB C-Media, too */228 if (rate == 48000 && nr_rates == 1 &&229 (chip->usb_id == USB_ID(0x0d8c, 0x0201) ||230 chip->usb_id == USB_ID(0x0d8c, 0x0102) ||231 chip->usb_id == USB_ID(0x0d8c, 0x0078) ||232 chip->usb_id == USB_ID(0x0ccd, 0x00b1)) &&233 fp->altsetting == 5 && fp->maxpacksize == 392)234 rate = 96000;235 /* Creative VF0420/VF0470 Live Cams report 16 kHz instead of 8kHz */236 if (rate == 16000 &&237 (chip->usb_id == USB_ID(0x041e, 0x4064) ||238 chip->usb_id == USB_ID(0x041e, 0x4068)))239 rate = 8000;240 241 fp->rate_table[fp->nr_rates++] = rate;242 }243 if (!fp->nr_rates) {244 usb_audio_info(chip,245 "%u:%d: All rates were zero\n",246 fp->iface, fp->altsetting);247 return -EINVAL;248 }249 set_rate_table_min_max(fp);250 } else {251 /* continuous rates */252 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;253 fp->rate_min = combine_triple(&fmt[offset + 1]);254 fp->rate_max = combine_triple(&fmt[offset + 4]);255 }256 257 /* Jabra Evolve 65 headset */258 if (chip->usb_id == USB_ID(0x0b0e, 0x030b)) {259 /* only 48kHz for playback while keeping 16kHz for capture */260 if (fp->nr_rates != 1)261 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);262 }263 264 return 0;265}266 267 268/*269 * Presonus Studio 1810c supports a limited set of sampling270 * rates per altsetting but reports the full set each time.271 * If we don't filter out the unsupported rates and attempt272 * to configure the card, it will hang refusing to do any273 * further audio I/O until a hard reset is performed.274 *275 * The list of supported rates per altsetting (set of available276 * I/O channels) is described in the owner's manual, section 2.2.277 */278static bool s1810c_valid_sample_rate(struct audioformat *fp,279 unsigned int rate)280{281 switch (fp->altsetting) {282 case 1:283 /* All ADAT ports available */284 return rate <= 48000;285 case 2:286 /* Half of ADAT ports available */287 return (rate == 88200 || rate == 96000);288 case 3:289 /* Analog I/O only (no S/PDIF nor ADAT) */290 return rate >= 176400;291 default:292 return false;293 }294 return false;295}296 297/*298 * Many Focusrite devices supports a limited set of sampling rates per299 * altsetting. Maximum rate is exposed in the last 4 bytes of Format Type300 * descriptor which has a non-standard bLength = 10.301 */302static bool focusrite_valid_sample_rate(struct snd_usb_audio *chip,303 struct audioformat *fp,304 unsigned int rate)305{306 struct usb_interface *iface;307 struct usb_host_interface *alts;308 unsigned char *fmt;309 unsigned int max_rate;310 311 iface = usb_ifnum_to_if(chip->dev, fp->iface);312 if (!iface)313 return true;314 315 alts = &iface->altsetting[fp->altset_idx];316 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen,317 NULL, UAC_FORMAT_TYPE);318 if (!fmt)319 return true;320 321 if (fmt[0] == 10) { /* bLength */322 max_rate = combine_quad(&fmt[6]);323 324 /* Validate max rate */325 if (max_rate != 48000 &&326 max_rate != 96000 &&327 max_rate != 192000 &&328 max_rate != 384000) {329 330 usb_audio_info(chip,331 "%u:%d : unexpected max rate: %u\n",332 fp->iface, fp->altsetting, max_rate);333 334 return true;335 }336 337 return rate <= max_rate;338 }339 340 return true;341}342 343/*344 * Helper function to walk the array of sample rate triplets reported by345 * the device. The problem is that we need to parse whole array first to346 * get to know how many sample rates we have to expect.347 * Then fp->rate_table can be allocated and filled.348 */349static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip,350 struct audioformat *fp, int nr_triplets,351 const unsigned char *data)352{353 int i, nr_rates = 0;354 355 for (i = 0; i < nr_triplets; i++) {356 int min = combine_quad(&data[2 + 12 * i]);357 int max = combine_quad(&data[6 + 12 * i]);358 int res = combine_quad(&data[10 + 12 * i]);359 unsigned int rate;360 361 if ((max < 0) || (min < 0) || (res < 0) || (max < min))362 continue;363 364 /*365 * for ranges with res == 1, we announce a continuous sample366 * rate range, and this function should return 0 for no further367 * parsing.368 */369 if (res == 1) {370 fp->rate_min = min;371 fp->rate_max = max;372 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;373 return 0;374 }375 376 for (rate = min; rate <= max; rate += res) {377 378 /* Filter out invalid rates on Presonus Studio 1810c */379 if (chip->usb_id == USB_ID(0x194f, 0x010c) &&380 !s1810c_valid_sample_rate(fp, rate))381 goto skip_rate;382 383 /* Filter out invalid rates on Focusrite devices */384 if (USB_ID_VENDOR(chip->usb_id) == 0x1235 &&385 !focusrite_valid_sample_rate(chip, fp, rate))386 goto skip_rate;387 388 if (fp->rate_table)389 fp->rate_table[nr_rates] = rate;390 nr_rates++;391 if (nr_rates >= MAX_NR_RATES) {392 usb_audio_err(chip, "invalid uac2 rates\n");393 break;394 }395 396skip_rate:397 /* avoid endless loop */398 if (res == 0)399 break;400 }401 }402 403 return nr_rates;404}405 406/* Line6 Helix series and the Rode Rodecaster Pro don't support the407 * UAC2_CS_RANGE usb function call. Return a static table of known408 * clock rates.409 */410static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip,411 struct audioformat *fp)412{413 switch (chip->usb_id) {414 case USB_ID(0x0e41, 0x4241): /* Line6 Helix */415 case USB_ID(0x0e41, 0x4242): /* Line6 Helix Rack */416 case USB_ID(0x0e41, 0x4244): /* Line6 Helix LT */417 case USB_ID(0x0e41, 0x4246): /* Line6 HX-Stomp */418 case USB_ID(0x0e41, 0x4253): /* Line6 HX-Stomp XL */419 case USB_ID(0x0e41, 0x4247): /* Line6 Pod Go */420 case USB_ID(0x0e41, 0x4248): /* Line6 Helix >= fw 2.82 */421 case USB_ID(0x0e41, 0x4249): /* Line6 Helix Rack >= fw 2.82 */422 case USB_ID(0x0e41, 0x424a): /* Line6 Helix LT >= fw 2.82 */423 case USB_ID(0x0e41, 0x424b): /* Line6 Pod Go */424 case USB_ID(0x19f7, 0x0011): /* Rode Rodecaster Pro */425 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);426 }427 428 return -ENODEV;429}430 431/* check whether the given altsetting is supported for the already set rate */432static bool check_valid_altsetting_v2v3(struct snd_usb_audio *chip, int iface,433 int altsetting)434{435 struct usb_device *dev = chip->dev;436 __le64 raw_data = 0;437 u64 data;438 int err;439 440 /* we assume 64bit is enough for any altsettings */441 if (snd_BUG_ON(altsetting >= 64 - 8))442 return false;443 444 err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR,445 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,446 UAC2_AS_VAL_ALT_SETTINGS << 8,447 iface, &raw_data, sizeof(raw_data));448 if (err < 0)449 return false;450 451 data = le64_to_cpu(raw_data);452 /* first byte contains the bitmap size */453 if ((data & 0xff) * 8 < altsetting)454 return false;455 if (data & (1ULL << (altsetting + 8)))456 return true;457 458 return false;459}460 461/*462 * Validate each sample rate with the altsetting463 * Rebuild the rate table if only partial values are valid464 */465static int validate_sample_rate_table_v2v3(struct snd_usb_audio *chip,466 struct audioformat *fp,467 int clock)468{469 struct usb_device *dev = chip->dev;470 struct usb_host_interface *alts;471 unsigned int *table;472 unsigned int nr_rates;473 int i, err;474 u32 bmControls;475 476 /* performing the rate verification may lead to unexpected USB bus477 * behavior afterwards by some unknown reason. Do this only for the478 * known devices.479 */480 if (!(chip->quirk_flags & QUIRK_FLAG_VALIDATE_RATES))481 return 0; /* don't perform the validation as default */482 483 alts = snd_usb_get_host_interface(chip, fp->iface, fp->altsetting);484 if (!alts)485 return 0;486 487 if (fp->protocol == UAC_VERSION_3) {488 struct uac3_as_header_descriptor *as = snd_usb_find_csint_desc(489 alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);490 bmControls = le32_to_cpu(as->bmControls);491 } else {492 struct uac2_as_header_descriptor *as = snd_usb_find_csint_desc(493 alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);494 bmControls = as->bmControls;495 }496 497 if (!uac_v2v3_control_is_readable(bmControls,498 UAC2_AS_VAL_ALT_SETTINGS))499 return 0;500 501 table = kcalloc(fp->nr_rates, sizeof(*table), GFP_KERNEL);502 if (!table)503 return -ENOMEM;504 505 /* clear the interface altsetting at first */506 usb_set_interface(dev, fp->iface, 0);507 508 nr_rates = 0;509 for (i = 0; i < fp->nr_rates; i++) {510 err = snd_usb_set_sample_rate_v2v3(chip, fp, clock,511 fp->rate_table[i]);512 if (err < 0)513 continue;514 515 if (check_valid_altsetting_v2v3(chip, fp->iface, fp->altsetting))516 table[nr_rates++] = fp->rate_table[i];517 }518 519 if (!nr_rates) {520 usb_audio_dbg(chip,521 "No valid sample rate available for %d:%d, assuming a firmware bug\n",522 fp->iface, fp->altsetting);523 nr_rates = fp->nr_rates; /* continue as is */524 }525 526 if (fp->nr_rates == nr_rates) {527 kfree(table);528 return 0;529 }530 531 kfree(fp->rate_table);532 fp->rate_table = table;533 fp->nr_rates = nr_rates;534 return 0;535}536 537/*538 * parse the format descriptor and stores the possible sample rates539 * on the audioformat table (audio class v2 and v3).540 */541static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip,542 struct audioformat *fp)543{544 struct usb_device *dev = chip->dev;545 unsigned char tmp[2], *data;546 int nr_triplets, data_size, ret = 0, ret_l6;547 int clock = snd_usb_clock_find_source(chip, fp, false);548 struct usb_host_interface *ctrl_intf;549 550 ctrl_intf = snd_usb_find_ctrl_interface(chip, fp->iface);551 if (clock < 0) {552 dev_err(&dev->dev,553 "%s(): unable to find clock source (clock %d)\n",554 __func__, clock);555 goto err;556 }557 558 /* get the number of sample rates first by only fetching 2 bytes */559 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,560 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,561 UAC2_CS_CONTROL_SAM_FREQ << 8,562 snd_usb_ctrl_intf(ctrl_intf) | (clock << 8),563 tmp, sizeof(tmp));564 565 if (ret < 0) {566 /* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */567 ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp);568 if (ret_l6 == -ENODEV) {569 /* no line6 device found continue showing the error */570 dev_err(&dev->dev,571 "%s(): unable to retrieve number of sample rates (clock %d)\n",572 __func__, clock);573 goto err;574 }575 if (ret_l6 == 0) {576 dev_info(&dev->dev,577 "%s(): unable to retrieve number of sample rates: set it to a predefined value (clock %d).\n",578 __func__, clock);579 return 0;580 }581 ret = ret_l6;582 goto err;583 }584 585 nr_triplets = (tmp[1] << 8) | tmp[0];586 data_size = 2 + 12 * nr_triplets;587 data = kzalloc(data_size, GFP_KERNEL);588 if (!data) {589 ret = -ENOMEM;590 goto err;591 }592 593 /* now get the full information */594 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,595 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,596 UAC2_CS_CONTROL_SAM_FREQ << 8,597 snd_usb_ctrl_intf(ctrl_intf) | (clock << 8),598 data, data_size);599 600 if (ret < 0) {601 dev_err(&dev->dev,602 "%s(): unable to retrieve sample rate range (clock %d)\n",603 __func__, clock);604 ret = -EINVAL;605 goto err_free;606 }607 608 /* Call the triplet parser, and make sure fp->rate_table is NULL.609 * We just use the return value to know how many sample rates we610 * will have to deal with. */611 kfree(fp->rate_table);612 fp->rate_table = NULL;613 fp->nr_rates = parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);614 615 if (fp->nr_rates == 0) {616 /* SNDRV_PCM_RATE_CONTINUOUS */617 ret = 0;618 goto err_free;619 }620 621 fp->rate_table = kmalloc_array(fp->nr_rates, sizeof(int), GFP_KERNEL);622 if (!fp->rate_table) {623 ret = -ENOMEM;624 goto err_free;625 }626 627 /* Call the triplet parser again, but this time, fp->rate_table is628 * allocated, so the rates will be stored */629 parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);630 631 ret = validate_sample_rate_table_v2v3(chip, fp, clock);632 if (ret < 0)633 goto err_free;634 635 set_rate_table_min_max(fp);636 637err_free:638 kfree(data);639err:640 return ret;641}642 643/*644 * parse the format type I and III descriptors645 */646static int parse_audio_format_i(struct snd_usb_audio *chip,647 struct audioformat *fp, u64 format,648 void *_fmt)649{650 snd_pcm_format_t pcm_format;651 unsigned int fmt_type;652 int ret;653 654 switch (fp->protocol) {655 default:656 case UAC_VERSION_1:657 case UAC_VERSION_2: {658 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;659 660 fmt_type = fmt->bFormatType;661 break;662 }663 case UAC_VERSION_3: {664 /* fp->fmt_type is already set in this case */665 fmt_type = fp->fmt_type;666 break;667 }668 }669 670 if (fmt_type == UAC_FORMAT_TYPE_III) {671 /* FIXME: the format type is really IECxxx672 * but we give normal PCM format to get the existing673 * apps working...674 */675 switch (chip->usb_id) {676 677 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */678 if (chip->setup == 0x00 && 679 fp->altsetting == 6)680 pcm_format = SNDRV_PCM_FORMAT_S16_BE;681 else682 pcm_format = SNDRV_PCM_FORMAT_S16_LE;683 break;684 default:685 pcm_format = SNDRV_PCM_FORMAT_S16_LE;686 }687 fp->formats = pcm_format_to_bits(pcm_format);688 } else {689 fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt);690 if (!fp->formats)691 return -EINVAL;692 }693 694 /* gather possible sample rates */695 /* audio class v1 reports possible sample rates as part of the696 * proprietary class specific descriptor.697 * audio class v2 uses class specific EP0 range requests for that.698 */699 switch (fp->protocol) {700 default:701 case UAC_VERSION_1: {702 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;703 704 fp->channels = fmt->bNrChannels;705 ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);706 break;707 }708 case UAC_VERSION_2:709 case UAC_VERSION_3: {710 /* fp->channels is already set in this case */711 ret = parse_audio_format_rates_v2v3(chip, fp);712 break;713 }714 }715 716 if (fp->channels < 1) {717 usb_audio_err(chip,718 "%u:%d : invalid channels %d\n",719 fp->iface, fp->altsetting, fp->channels);720 return -EINVAL;721 }722 723 return ret;724}725 726/*727 * parse the format type II descriptor728 */729static int parse_audio_format_ii(struct snd_usb_audio *chip,730 struct audioformat *fp,731 u64 format, void *_fmt)732{733 int brate, framesize, ret;734 735 switch (format) {736 case UAC_FORMAT_TYPE_II_AC3:737 /* FIXME: there is no AC3 format defined yet */738 // fp->formats = SNDRV_PCM_FMTBIT_AC3;739 fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */740 break;741 case UAC_FORMAT_TYPE_II_MPEG:742 fp->formats = SNDRV_PCM_FMTBIT_MPEG;743 break;744 default:745 usb_audio_info(chip,746 "%u:%d : unknown format tag %#llx is detected. processed as MPEG.\n",747 fp->iface, fp->altsetting, format);748 fp->formats = SNDRV_PCM_FMTBIT_MPEG;749 break;750 }751 752 fp->channels = 1;753 754 switch (fp->protocol) {755 default:756 case UAC_VERSION_1: {757 struct uac_format_type_ii_discrete_descriptor *fmt = _fmt;758 brate = le16_to_cpu(fmt->wMaxBitRate);759 framesize = le16_to_cpu(fmt->wSamplesPerFrame);760 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);761 fp->frame_size = framesize;762 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */763 break;764 }765 case UAC_VERSION_2: {766 struct uac_format_type_ii_ext_descriptor *fmt = _fmt;767 brate = le16_to_cpu(fmt->wMaxBitRate);768 framesize = le16_to_cpu(fmt->wSamplesPerFrame);769 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);770 fp->frame_size = framesize;771 ret = parse_audio_format_rates_v2v3(chip, fp);772 break;773 }774 }775 776 return ret;777}778 779int snd_usb_parse_audio_format(struct snd_usb_audio *chip,780 struct audioformat *fp, u64 format,781 struct uac_format_type_i_continuous_descriptor *fmt,782 int stream)783{784 int err;785 786 switch (fmt->bFormatType) {787 case UAC_FORMAT_TYPE_I:788 case UAC_FORMAT_TYPE_III:789 err = parse_audio_format_i(chip, fp, format, fmt);790 break;791 case UAC_FORMAT_TYPE_II:792 err = parse_audio_format_ii(chip, fp, format, fmt);793 break;794 default:795 usb_audio_info(chip,796 "%u:%d : format type %d is not supported yet\n",797 fp->iface, fp->altsetting,798 fmt->bFormatType);799 return -ENOTSUPP;800 }801 fp->fmt_type = fmt->bFormatType;802 if (err < 0)803 return err;804#if 1805 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */806 /* extigy apparently supports sample rates other than 48k807 * but not in ordinary way. so we enable only 48k atm.808 */809 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||810 chip->usb_id == USB_ID(0x041e, 0x3020) ||811 chip->usb_id == USB_ID(0x041e, 0x3061)) {812 if (fmt->bFormatType == UAC_FORMAT_TYPE_I &&813 fp->rates != SNDRV_PCM_RATE_48000 &&814 fp->rates != SNDRV_PCM_RATE_96000)815 return -ENOTSUPP;816 }817#endif818 return 0;819}820 821int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,822 struct audioformat *fp,823 struct uac3_as_header_descriptor *as,824 int stream)825{826 u64 format = le64_to_cpu(as->bmFormats);827 int err;828 829 /*830 * Type I format bits are D0..D6831 * This test works because type IV is not supported832 */833 if (format & 0x7f)834 fp->fmt_type = UAC_FORMAT_TYPE_I;835 else836 fp->fmt_type = UAC_FORMAT_TYPE_III;837 838 err = parse_audio_format_i(chip, fp, format, as);839 if (err < 0)840 return err;841 842 return 0;843}844