1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 */ 4 5 6 #include <linux/init.h> 7 #include <linux/slab.h> 8 #include <linux/usb.h> 9 #include <linux/usb/audio.h> 10 #include <linux/usb/audio-v2.h> 11 #include <linux/usb/audio-v3.h> 12 13 #include <sound/core.h> 14 #include <sound/pcm.h> 15 #include <sound/control.h> 16 #include <sound/tlv.h> 17 18 #include "usbaudio.h" 19 #include "card.h" 20 #include "proc.h" 21 #include "quirks.h" 22 #include "endpoint.h" 23 #include "pcm.h" 24 #include "helper.h" 25 #include "format.h" 26 #include "clock.h" 27 #include "stream.h" 28 #include "power.h" 29 #include "media.h" 30 31 static void audioformat_free(struct audioformat *fp) 32 { 33 list_del(&fp->list); /* unlink for avoiding double-free */ 34 kfree(fp->rate_table); 35 kfree(fp->chmap); 36 kfree(fp); 37 } 38 39 /* 40 * free a substream 41 */ 42 static void free_substream(struct snd_usb_substream *subs) 43 { 44 struct audioformat *fp, *n; 45 46 if (!subs->num_formats) 47 return; /* not initialized */ 48 list_for_each_entry_safe(fp, n, &subs->fmt_list, list) 49 audioformat_free(fp); 50 kfree(subs->rate_list.list); 51 kfree(subs->str_pd); 52 snd_media_stream_delete(subs); 53 } 54 55 56 /* 57 * free a usb stream instance 58 */ 59 static void snd_usb_audio_stream_free(struct snd_usb_stream *stream) 60 { 61 free_substream(&stream->substream[0]); 62 free_substream(&stream->substream[1]); 63 list_del(&stream->list); 64 kfree(stream); 65 } 66 67 static void snd_usb_audio_pcm_free(struct snd_pcm *pcm) 68 { 69 struct snd_usb_stream *stream = pcm->private_data; 70 if (stream) { 71 stream->pcm = NULL; 72 snd_usb_audio_stream_free(stream); 73 } 74 } 75 76 /* 77 * initialize the substream instance. 78 */ 79 80 static void snd_usb_init_substream(struct snd_usb_stream *as, 81 int stream, 82 struct audioformat *fp, 83 struct snd_usb_power_domain *pd) 84 { 85 struct snd_usb_substream *subs = &as->substream[stream]; 86 87 INIT_LIST_HEAD(&subs->fmt_list); 88 spin_lock_init(&subs->lock); 89 90 subs->stream = as; 91 subs->direction = stream; 92 subs->dev = as->chip->dev; 93 subs->txfr_quirk = as->chip->txfr_quirk; 94 subs->tx_length_quirk = as->chip->tx_length_quirk; 95 subs->speed = snd_usb_get_speed(subs->dev); 96 subs->pkt_offset_adj = 0; 97 98 snd_usb_set_pcm_ops(as->pcm, stream); 99 100 list_add_tail(&fp->list, &subs->fmt_list); 101 subs->formats |= fp->formats; 102 subs->num_formats++; 103 subs->fmt_type = fp->fmt_type; 104 subs->ep_num = fp->endpoint; 105 if (fp->channels > subs->channels_max) 106 subs->channels_max = fp->channels; 107 108 if (pd) { 109 subs->str_pd = pd; 110 /* Initialize Power Domain to idle status D1 */ 111 snd_usb_power_domain_set(subs->stream->chip, pd, 112 UAC3_PD_STATE_D1); 113 } 114 115 snd_usb_preallocate_buffer(subs); 116 } 117 118 /* kctl callbacks for usb-audio channel maps */ 119 static int usb_chmap_ctl_info(struct snd_kcontrol *kcontrol, 120 struct snd_ctl_elem_info *uinfo) 121 { 122 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); 123 struct snd_usb_substream *subs = info->private_data; 124 125 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 126 uinfo->count = subs->channels_max; 127 uinfo->value.integer.min = 0; 128 uinfo->value.integer.max = SNDRV_CHMAP_LAST; 129 return 0; 130 } 131 132 /* check whether a duplicated entry exists in the audiofmt list */ 133 static bool have_dup_chmap(struct snd_usb_substream *subs, 134 struct audioformat *fp) 135 { 136 struct audioformat *prev = fp; 137 138 list_for_each_entry_continue_reverse(prev, &subs->fmt_list, list) { 139 if (prev->chmap && 140 !memcmp(prev->chmap, fp->chmap, sizeof(*fp->chmap))) 141 return true; 142 } 143 return false; 144 } 145 146 static int usb_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, 147 unsigned int size, unsigned int __user *tlv) 148 { 149 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); 150 struct snd_usb_substream *subs = info->private_data; 151 struct audioformat *fp; 152 unsigned int __user *dst; 153 int count = 0; 154 155 if (size < 8) 156 return -ENOMEM; 157 if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) 158 return -EFAULT; 159 size -= 8; 160 dst = tlv + 2; 161 list_for_each_entry(fp, &subs->fmt_list, list) { 162 int i, ch_bytes; 163 164 if (!fp->chmap) 165 continue; 166 if (have_dup_chmap(subs, fp)) 167 continue; 168 /* copy the entry */ 169 ch_bytes = fp->chmap->channels * 4; 170 if (size < 8 + ch_bytes) 171 return -ENOMEM; 172 if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) || 173 put_user(ch_bytes, dst + 1)) 174 return -EFAULT; 175 dst += 2; 176 for (i = 0; i < fp->chmap->channels; i++, dst++) { 177 if (put_user(fp->chmap->map[i], dst)) 178 return -EFAULT; 179 } 180 181 count += 8 + ch_bytes; 182 size -= 8 + ch_bytes; 183 } 184 if (put_user(count, tlv + 1)) 185 return -EFAULT; 186 return 0; 187 } 188 189 static int usb_chmap_ctl_get(struct snd_kcontrol *kcontrol, 190 struct snd_ctl_elem_value *ucontrol) 191 { 192 struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); 193 struct snd_usb_substream *subs = info->private_data; 194 struct snd_pcm_chmap_elem *chmap = NULL; 195 int i; 196 197 memset(ucontrol->value.integer.value, 0, 198 sizeof(ucontrol->value.integer.value)); 199 if (subs->cur_audiofmt) 200 chmap = subs->cur_audiofmt->chmap; 201 if (chmap) { 202 for (i = 0; i < chmap->channels; i++) 203 ucontrol->value.integer.value[i] = chmap->map[i]; 204 } 205 return 0; 206 } 207 208 /* create a chmap kctl assigned to the given USB substream */ 209 static int add_chmap(struct snd_pcm *pcm, int stream, 210 struct snd_usb_substream *subs) 211 { 212 struct audioformat *fp; 213 struct snd_pcm_chmap *chmap; 214 struct snd_kcontrol *kctl; 215 int err; 216 217 list_for_each_entry(fp, &subs->fmt_list, list) 218 if (fp->chmap) 219 goto ok; 220 /* no chmap is found */ 221 return 0; 222 223 ok: 224 err = snd_pcm_add_chmap_ctls(pcm, stream, NULL, 0, 0, &chmap); 225 if (err < 0) 226 return err; 227 228 /* override handlers */ 229 chmap->private_data = subs; 230 kctl = chmap->kctl; 231 kctl->info = usb_chmap_ctl_info; 232 kctl->get = usb_chmap_ctl_get; 233 kctl->tlv.c = usb_chmap_ctl_tlv; 234 235 return 0; 236 } 237 238 /* convert from USB ChannelConfig bits to ALSA chmap element */ 239 static struct snd_pcm_chmap_elem *convert_chmap(int channels, unsigned int bits, 240 int protocol) 241 { 242 static unsigned int uac1_maps[] = { 243 SNDRV_CHMAP_FL, /* left front */ 244 SNDRV_CHMAP_FR, /* right front */ 245 SNDRV_CHMAP_FC, /* center front */ 246 SNDRV_CHMAP_LFE, /* LFE */ 247 SNDRV_CHMAP_SL, /* left surround */ 248 SNDRV_CHMAP_SR, /* right surround */ 249 SNDRV_CHMAP_FLC, /* left of center */ 250 SNDRV_CHMAP_FRC, /* right of center */ 251 SNDRV_CHMAP_RC, /* surround */ 252 SNDRV_CHMAP_SL, /* side left */ 253 SNDRV_CHMAP_SR, /* side right */ 254 SNDRV_CHMAP_TC, /* top */ 255 0 /* terminator */ 256 }; 257 static unsigned int uac2_maps[] = { 258 SNDRV_CHMAP_FL, /* front left */ 259 SNDRV_CHMAP_FR, /* front right */ 260 SNDRV_CHMAP_FC, /* front center */ 261 SNDRV_CHMAP_LFE, /* LFE */ 262 SNDRV_CHMAP_RL, /* back left */ 263 SNDRV_CHMAP_RR, /* back right */ 264 SNDRV_CHMAP_FLC, /* front left of center */ 265 SNDRV_CHMAP_FRC, /* front right of center */ 266 SNDRV_CHMAP_RC, /* back center */ 267 SNDRV_CHMAP_SL, /* side left */ 268 SNDRV_CHMAP_SR, /* side right */ 269 SNDRV_CHMAP_TC, /* top center */ 270 SNDRV_CHMAP_TFL, /* top front left */ 271 SNDRV_CHMAP_TFC, /* top front center */ 272 SNDRV_CHMAP_TFR, /* top front right */ 273 SNDRV_CHMAP_TRL, /* top back left */ 274 SNDRV_CHMAP_TRC, /* top back center */ 275 SNDRV_CHMAP_TRR, /* top back right */ 276 SNDRV_CHMAP_TFLC, /* top front left of center */ 277 SNDRV_CHMAP_TFRC, /* top front right of center */ 278 SNDRV_CHMAP_LLFE, /* left LFE */ 279 SNDRV_CHMAP_RLFE, /* right LFE */ 280 SNDRV_CHMAP_TSL, /* top side left */ 281 SNDRV_CHMAP_TSR, /* top side right */ 282 SNDRV_CHMAP_BC, /* bottom center */ 283 SNDRV_CHMAP_RLC, /* back left of center */ 284 SNDRV_CHMAP_RRC, /* back right of center */ 285 0 /* terminator */ 286 }; 287 struct snd_pcm_chmap_elem *chmap; 288 const unsigned int *maps; 289 int c; 290 291 if (channels > ARRAY_SIZE(chmap->map)) 292 return NULL; 293 294 chmap = kzalloc(sizeof(*chmap), GFP_KERNEL); 295 if (!chmap) 296 return NULL; 297 298 maps = protocol == UAC_VERSION_2 ? uac2_maps : uac1_maps; 299 chmap->channels = channels; 300 c = 0; 301 302 if (bits) { 303 for (; bits && *maps; maps++, bits >>= 1) 304 if (bits & 1) 305 chmap->map[c++] = *maps; 306 } else { 307 /* If we're missing wChannelConfig, then guess something 308 to make sure the channel map is not skipped entirely */ 309 if (channels == 1) 310 chmap->map[c++] = SNDRV_CHMAP_MONO; 311 else 312 for (; c < channels && *maps; maps++) 313 chmap->map[c++] = *maps; 314 } 315 316 for (; c < channels; c++) 317 chmap->map[c] = SNDRV_CHMAP_UNKNOWN; 318 319 return chmap; 320 } 321 322 /* UAC3 device stores channels information in Cluster Descriptors */ 323 static struct 324 snd_pcm_chmap_elem *convert_chmap_v3(struct uac3_cluster_header_descriptor 325 *cluster) 326 { 327 unsigned int channels = cluster->bNrChannels; 328 struct snd_pcm_chmap_elem *chmap; 329 void *p = cluster; 330 int len, c; 331 332 if (channels > ARRAY_SIZE(chmap->map)) 333 return NULL; 334 335 chmap = kzalloc(sizeof(*chmap), GFP_KERNEL); 336 if (!chmap) 337 return NULL; 338 339 len = le16_to_cpu(cluster->wLength); 340 c = 0; 341 p += sizeof(struct uac3_cluster_header_descriptor); 342 343 while (((p - (void *)cluster) < len) && (c < channels)) { 344 struct uac3_cluster_segment_descriptor *cs_desc = p; 345 u16 cs_len; 346 u8 cs_type; 347 348 cs_len = le16_to_cpu(cs_desc->wLength); 349 cs_type = cs_desc->bSegmentType; 350 351 if (cs_type == UAC3_CHANNEL_INFORMATION) { 352 struct uac3_cluster_information_segment_descriptor *is = p; 353 unsigned char map; 354 355 /* 356 * TODO: this conversion is not complete, update it 357 * after adding UAC3 values to asound.h 358 */ 359 switch (is->bChRelationship) { 360 case UAC3_CH_MONO: 361 map = SNDRV_CHMAP_MONO; 362 break; 363 case UAC3_CH_LEFT: 364 case UAC3_CH_FRONT_LEFT: 365 case UAC3_CH_HEADPHONE_LEFT: 366 map = SNDRV_CHMAP_FL; 367 break; 368 case UAC3_CH_RIGHT: 369 case UAC3_CH_FRONT_RIGHT: 370 case UAC3_CH_HEADPHONE_RIGHT: 371 map = SNDRV_CHMAP_FR; 372 break; 373 case UAC3_CH_FRONT_CENTER: 374 map = SNDRV_CHMAP_FC; 375 break; 376 case UAC3_CH_FRONT_LEFT_OF_CENTER: 377 map = SNDRV_CHMAP_FLC; 378 break; 379 case UAC3_CH_FRONT_RIGHT_OF_CENTER: 380 map = SNDRV_CHMAP_FRC; 381 break; 382 case UAC3_CH_SIDE_LEFT: 383 map = SNDRV_CHMAP_SL; 384 break; 385 case UAC3_CH_SIDE_RIGHT: 386 map = SNDRV_CHMAP_SR; 387 break; 388 case UAC3_CH_BACK_LEFT: 389 map = SNDRV_CHMAP_RL; 390 break; 391 case UAC3_CH_BACK_RIGHT: 392 map = SNDRV_CHMAP_RR; 393 break; 394 case UAC3_CH_BACK_CENTER: 395 map = SNDRV_CHMAP_RC; 396 break; 397 case UAC3_CH_BACK_LEFT_OF_CENTER: 398 map = SNDRV_CHMAP_RLC; 399 break; 400 case UAC3_CH_BACK_RIGHT_OF_CENTER: 401 map = SNDRV_CHMAP_RRC; 402 break; 403 case UAC3_CH_TOP_CENTER: 404 map = SNDRV_CHMAP_TC; 405 break; 406 case UAC3_CH_TOP_FRONT_LEFT: 407 map = SNDRV_CHMAP_TFL; 408 break; 409 case UAC3_CH_TOP_FRONT_RIGHT: 410 map = SNDRV_CHMAP_TFR; 411 break; 412 case UAC3_CH_TOP_FRONT_CENTER: 413 map = SNDRV_CHMAP_TFC; 414 break; 415 case UAC3_CH_TOP_FRONT_LOC: 416 map = SNDRV_CHMAP_TFLC; 417 break; 418 case UAC3_CH_TOP_FRONT_ROC: 419 map = SNDRV_CHMAP_TFRC; 420 break; 421 case UAC3_CH_TOP_SIDE_LEFT: 422 map = SNDRV_CHMAP_TSL; 423 break; 424 case UAC3_CH_TOP_SIDE_RIGHT: 425 map = SNDRV_CHMAP_TSR; 426 break; 427 case UAC3_CH_TOP_BACK_LEFT: 428 map = SNDRV_CHMAP_TRL; 429 break; 430 case UAC3_CH_TOP_BACK_RIGHT: 431 map = SNDRV_CHMAP_TRR; 432 break; 433 case UAC3_CH_TOP_BACK_CENTER: 434 map = SNDRV_CHMAP_TRC; 435 break; 436 case UAC3_CH_BOTTOM_CENTER: 437 map = SNDRV_CHMAP_BC; 438 break; 439 case UAC3_CH_LOW_FREQUENCY_EFFECTS: 440 map = SNDRV_CHMAP_LFE; 441 break; 442 case UAC3_CH_LFE_LEFT: 443 map = SNDRV_CHMAP_LLFE; 444 break; 445 case UAC3_CH_LFE_RIGHT: 446 map = SNDRV_CHMAP_RLFE; 447 break; 448 case UAC3_CH_RELATIONSHIP_UNDEFINED: 449 default: 450 map = SNDRV_CHMAP_UNKNOWN; 451 break; 452 } 453 chmap->map[c++] = map; 454 } 455 p += cs_len; 456 } 457 458 if (channels < c) 459 pr_err("%s: channel number mismatch\n", __func__); 460 461 chmap->channels = channels; 462 463 for (; c < channels; c++) 464 chmap->map[c] = SNDRV_CHMAP_UNKNOWN; 465 466 return chmap; 467 } 468 469 /* 470 * add this endpoint to the chip instance. 471 * if a stream with the same endpoint already exists, append to it. 472 * if not, create a new pcm stream. note, fp is added to the substream 473 * fmt_list and will be freed on the chip instance release. do not free 474 * fp or do remove it from the substream fmt_list to avoid double-free. 475 */ 476 static int __snd_usb_add_audio_stream(struct snd_usb_audio *chip, 477 int stream, 478 struct audioformat *fp, 479 struct snd_usb_power_domain *pd) 480 481 { 482 struct snd_usb_stream *as; 483 struct snd_usb_substream *subs; 484 struct snd_pcm *pcm; 485 int err; 486 487 list_for_each_entry(as, &chip->pcm_list, list) { 488 if (as->fmt_type != fp->fmt_type) 489 continue; 490 subs = &as->substream[stream]; 491 if (subs->ep_num == fp->endpoint) { 492 list_add_tail(&fp->list, &subs->fmt_list); 493 subs->num_formats++; 494 subs->formats |= fp->formats; 495 return 0; 496 } 497 } 498 /* look for an empty stream */ 499 list_for_each_entry(as, &chip->pcm_list, list) { 500 if (as->fmt_type != fp->fmt_type) 501 continue; 502 subs = &as->substream[stream]; 503 if (subs->ep_num) 504 continue; 505 err = snd_pcm_new_stream(as->pcm, stream, 1); 506 if (err < 0) 507 return err; 508 snd_usb_init_substream(as, stream, fp, pd); 509 return add_chmap(as->pcm, stream, subs); 510 } 511 512 /* create a new pcm */ 513 as = kzalloc(sizeof(*as), GFP_KERNEL); 514 if (!as) 515 return -ENOMEM; 516 as->pcm_index = chip->pcm_devs; 517 as->chip = chip; 518 as->fmt_type = fp->fmt_type; 519 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs, 520 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0, 521 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1, 522 &pcm); 523 if (err < 0) { 524 kfree(as); 525 return err; 526 } 527 as->pcm = pcm; 528 pcm->private_data = as; 529 pcm->private_free = snd_usb_audio_pcm_free; 530 pcm->info_flags = 0; 531 if (chip->pcm_devs > 0) 532 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs); 533 else 534 strcpy(pcm->name, "USB Audio"); 535 536 snd_usb_init_substream(as, stream, fp, pd); 537 538 /* 539 * Keep using head insertion for M-Audio Audiophile USB (tm) which has a 540 * fix to swap capture stream order in conf/cards/USB-audio.conf 541 */ 542 if (chip->usb_id == USB_ID(0x0763, 0x2003)) 543 list_add(&as->list, &chip->pcm_list); 544 else 545 list_add_tail(&as->list, &chip->pcm_list); 546 547 chip->pcm_devs++; 548 549 snd_usb_proc_pcm_format_add(as); 550 551 return add_chmap(pcm, stream, &as->substream[stream]); 552 } 553 554 int snd_usb_add_audio_stream(struct snd_usb_audio *chip, 555 int stream, 556 struct audioformat *fp) 557 { 558 return __snd_usb_add_audio_stream(chip, stream, fp, NULL); 559 } 560 561 static int snd_usb_add_audio_stream_v3(struct snd_usb_audio *chip, 562 int stream, 563 struct audioformat *fp, 564 struct snd_usb_power_domain *pd) 565 { 566 return __snd_usb_add_audio_stream(chip, stream, fp, pd); 567 } 568 569 static int parse_uac_endpoint_attributes(struct snd_usb_audio *chip, 570 struct usb_host_interface *alts, 571 int protocol, int iface_no) 572 { 573 /* parsed with a v1 header here. that's ok as we only look at the 574 * header first which is the same for both versions */ 575 struct uac_iso_endpoint_descriptor *csep; 576 struct usb_interface_descriptor *altsd = get_iface_desc(alts); 577 int attributes = 0; 578 579 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT); 580 581 /* Creamware Noah has this descriptor after the 2nd endpoint */ 582 if (!csep && altsd->bNumEndpoints >= 2) 583 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT); 584 585 /* 586 * If we can't locate the USB_DT_CS_ENDPOINT descriptor in the extra 587 * bytes after the first endpoint, go search the entire interface. 588 * Some devices have it directly *before* the standard endpoint. 589 */ 590 if (!csep) 591 csep = snd_usb_find_desc(alts->extra, alts->extralen, NULL, USB_DT_CS_ENDPOINT); 592 593 if (!csep || csep->bLength < 7 || 594 csep->bDescriptorSubtype != UAC_EP_GENERAL) 595 goto error; 596 597 if (protocol == UAC_VERSION_1) { 598 attributes = csep->bmAttributes; 599 } else if (protocol == UAC_VERSION_2) { 600 struct uac2_iso_endpoint_descriptor *csep2 = 601 (struct uac2_iso_endpoint_descriptor *) csep; 602 603 if (csep2->bLength < sizeof(*csep2)) 604 goto error; 605 attributes = csep->bmAttributes & UAC_EP_CS_ATTR_FILL_MAX; 606 607 /* emulate the endpoint attributes of a v1 device */ 608 if (csep2->bmControls & UAC2_CONTROL_PITCH) 609 attributes |= UAC_EP_CS_ATTR_PITCH_CONTROL; 610 } else { /* UAC_VERSION_3 */ 611 struct uac3_iso_endpoint_descriptor *csep3 = 612 (struct uac3_iso_endpoint_descriptor *) csep; 613 614 if (csep3->bLength < sizeof(*csep3)) 615 goto error; 616 /* emulate the endpoint attributes of a v1 device */ 617 if (le32_to_cpu(csep3->bmControls) & UAC2_CONTROL_PITCH) 618 attributes |= UAC_EP_CS_ATTR_PITCH_CONTROL; 619 } 620 621 return attributes; 622 623 error: 624 usb_audio_warn(chip, 625 "%u:%d : no or invalid class specific endpoint descriptor\n", 626 iface_no, altsd->bAlternateSetting); 627 return 0; 628 } 629 630 /* find an input terminal descriptor (either UAC1 or UAC2) with the given 631 * terminal id 632 */ 633 static void * 634 snd_usb_find_input_terminal_descriptor(struct usb_host_interface *ctrl_iface, 635 int terminal_id, int protocol) 636 { 637 struct uac2_input_terminal_descriptor *term = NULL; 638 639 while ((term = snd_usb_find_csint_desc(ctrl_iface->extra, 640 ctrl_iface->extralen, 641 term, UAC_INPUT_TERMINAL))) { 642 if (!snd_usb_validate_audio_desc(term, protocol)) 643 continue; 644 if (term->bTerminalID == terminal_id) 645 return term; 646 } 647 648 return NULL; 649 } 650 651 static void * 652 snd_usb_find_output_terminal_descriptor(struct usb_host_interface *ctrl_iface, 653 int terminal_id, int protocol) 654 { 655 /* OK to use with both UAC2 and UAC3 */ 656 struct uac2_output_terminal_descriptor *term = NULL; 657 658 while ((term = snd_usb_find_csint_desc(ctrl_iface->extra, 659 ctrl_iface->extralen, 660 term, UAC_OUTPUT_TERMINAL))) { 661 if (!snd_usb_validate_audio_desc(term, protocol)) 662 continue; 663 if (term->bTerminalID == terminal_id) 664 return term; 665 } 666 667 return NULL; 668 } 669 670 static struct audioformat * 671 audio_format_alloc_init(struct snd_usb_audio *chip, 672 struct usb_host_interface *alts, 673 int protocol, int iface_no, int altset_idx, 674 int altno, int num_channels, int clock) 675 { 676 struct audioformat *fp; 677 678 fp = kzalloc(sizeof(*fp), GFP_KERNEL); 679 if (!fp) 680 return NULL; 681 682 fp->iface = iface_no; 683 fp->altsetting = altno; 684 fp->altset_idx = altset_idx; 685 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress; 686 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes; 687 fp->datainterval = snd_usb_parse_datainterval(chip, alts); 688 fp->protocol = protocol; 689 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize); 690 fp->channels = num_channels; 691 if (snd_usb_get_speed(chip->dev) == USB_SPEED_HIGH) 692 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1) 693 * (fp->maxpacksize & 0x7ff); 694 fp->clock = clock; 695 INIT_LIST_HEAD(&fp->list); 696 697 return fp; 698 } 699 700 static struct audioformat * 701 snd_usb_get_audioformat_uac12(struct snd_usb_audio *chip, 702 struct usb_host_interface *alts, 703 int protocol, int iface_no, int altset_idx, 704 int altno, int stream, int bm_quirk) 705 { 706 struct usb_device *dev = chip->dev; 707 struct uac_format_type_i_continuous_descriptor *fmt; 708 unsigned int num_channels = 0, chconfig = 0; 709 struct audioformat *fp; 710 int clock = 0; 711 u64 format; 712 713 /* get audio formats */ 714 if (protocol == UAC_VERSION_1) { 715 struct uac1_as_header_descriptor *as = 716 snd_usb_find_csint_desc(alts->extra, alts->extralen, 717 NULL, UAC_AS_GENERAL); 718 struct uac_input_terminal_descriptor *iterm; 719 720 if (!as) { 721 dev_err(&dev->dev, 722 "%u:%d : UAC_AS_GENERAL descriptor not found\n", 723 iface_no, altno); 724 return NULL; 725 } 726 727 if (as->bLength < sizeof(*as)) { 728 dev_err(&dev->dev, 729 "%u:%d : invalid UAC_AS_GENERAL desc\n", 730 iface_no, altno); 731 return NULL; 732 } 733 734 format = le16_to_cpu(as->wFormatTag); /* remember the format value */ 735 736 iterm = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf, 737 as->bTerminalLink, 738 protocol); 739 if (iterm) { 740 num_channels = iterm->bNrChannels; 741 chconfig = le16_to_cpu(iterm->wChannelConfig); 742 } 743 } else { /* UAC_VERSION_2 */ 744 struct uac2_input_terminal_descriptor *input_term; 745 struct uac2_output_terminal_descriptor *output_term; 746 struct uac2_as_header_descriptor *as = 747 snd_usb_find_csint_desc(alts->extra, alts->extralen, 748 NULL, UAC_AS_GENERAL); 749 750 if (!as) { 751 dev_err(&dev->dev, 752 "%u:%d : UAC_AS_GENERAL descriptor not found\n", 753 iface_no, altno); 754 return NULL; 755 } 756 757 if (as->bLength < sizeof(*as)) { 758 dev_err(&dev->dev, 759 "%u:%d : invalid UAC_AS_GENERAL desc\n", 760 iface_no, altno); 761 return NULL; 762 } 763 764 num_channels = as->bNrChannels; 765 format = le32_to_cpu(as->bmFormats); 766 chconfig = le32_to_cpu(as->bmChannelConfig); 767 768 /* 769 * lookup the terminal associated to this interface 770 * to extract the clock 771 */ 772 input_term = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf, 773 as->bTerminalLink, 774 protocol); 775 if (input_term) { 776 clock = input_term->bCSourceID; 777 if (!chconfig && (num_channels == input_term->bNrChannels)) 778 chconfig = le32_to_cpu(input_term->bmChannelConfig); 779 goto found_clock; 780 } 781 782 output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf, 783 as->bTerminalLink, 784 protocol); 785 if (output_term) { 786 clock = output_term->bCSourceID; 787 goto found_clock; 788 } 789 790 dev_err(&dev->dev, 791 "%u:%d : bogus bTerminalLink %d\n", 792 iface_no, altno, as->bTerminalLink); 793 return NULL; 794 } 795 796 found_clock: 797 /* get format type */ 798 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, 799 NULL, UAC_FORMAT_TYPE); 800 if (!fmt) { 801 dev_err(&dev->dev, 802 "%u:%d : no UAC_FORMAT_TYPE desc\n", 803 iface_no, altno); 804 return NULL; 805 } 806 if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8)) 807 || ((protocol == UAC_VERSION_2) && 808 (fmt->bLength < 6))) { 809 dev_err(&dev->dev, 810 "%u:%d : invalid UAC_FORMAT_TYPE desc\n", 811 iface_no, altno); 812 return NULL; 813 } 814 815 /* 816 * Blue Microphones workaround: The last altsetting is 817 * identical with the previous one, except for a larger 818 * packet size, but is actually a mislabeled two-channel 819 * setting; ignore it. 820 * 821 * Part 2: analyze quirk flag and format 822 */ 823 if (bm_quirk && fmt->bNrChannels == 1 && fmt->bSubframeSize == 2) 824 return NULL; 825 826 fp = audio_format_alloc_init(chip, alts, protocol, iface_no, 827 altset_idx, altno, num_channels, clock); 828 if (!fp) 829 return ERR_PTR(-ENOMEM); 830 831 fp->attributes = parse_uac_endpoint_attributes(chip, alts, protocol, 832 iface_no); 833 834 /* some quirks for attributes here */ 835 snd_usb_audioformat_attributes_quirk(chip, fp, stream); 836 837 /* ok, let's parse further... */ 838 if (snd_usb_parse_audio_format(chip, fp, format, 839 fmt, stream) < 0) { 840 audioformat_free(fp); 841 return NULL; 842 } 843 844 /* Create chmap */ 845 if (fp->channels != num_channels) 846 chconfig = 0; 847 848 fp->chmap = convert_chmap(fp->channels, chconfig, protocol); 849 850 return fp; 851 } 852 853 static struct audioformat * 854 snd_usb_get_audioformat_uac3(struct snd_usb_audio *chip, 855 struct usb_host_interface *alts, 856 struct snd_usb_power_domain **pd_out, 857 int iface_no, int altset_idx, 858 int altno, int stream) 859 { 860 struct usb_device *dev = chip->dev; 861 struct uac3_input_terminal_descriptor *input_term; 862 struct uac3_output_terminal_descriptor *output_term; 863 struct uac3_cluster_header_descriptor *cluster; 864 struct uac3_as_header_descriptor *as = NULL; 865 struct uac3_hc_descriptor_header hc_header; 866 struct snd_pcm_chmap_elem *chmap; 867 struct snd_usb_power_domain *pd; 868 unsigned char badd_profile; 869 u64 badd_formats = 0; 870 unsigned int num_channels; 871 struct audioformat *fp; 872 u16 cluster_id, wLength; 873 int clock = 0; 874 int err; 875 876 badd_profile = chip->badd_profile; 877 878 if (badd_profile >= UAC3_FUNCTION_SUBCLASS_GENERIC_IO) { 879 unsigned int maxpacksize = 880 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize); 881 882 switch (maxpacksize) { 883 default: 884 dev_err(&dev->dev, 885 "%u:%d : incorrect wMaxPacketSize for BADD profile\n", 886 iface_no, altno); 887 return NULL; 888 case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_16: 889 case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_16: 890 badd_formats = SNDRV_PCM_FMTBIT_S16_LE; 891 num_channels = 1; 892 break; 893 case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_24: 894 case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_24: 895 badd_formats = SNDRV_PCM_FMTBIT_S24_3LE; 896 num_channels = 1; 897 break; 898 case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_16: 899 case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_16: 900 badd_formats = SNDRV_PCM_FMTBIT_S16_LE; 901 num_channels = 2; 902 break; 903 case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_24: 904 case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_24: 905 badd_formats = SNDRV_PCM_FMTBIT_S24_3LE; 906 num_channels = 2; 907 break; 908 } 909 910 chmap = kzalloc(sizeof(*chmap), GFP_KERNEL); 911 if (!chmap) 912 return ERR_PTR(-ENOMEM); 913 914 if (num_channels == 1) { 915 chmap->map[0] = SNDRV_CHMAP_MONO; 916 } else { 917 chmap->map[0] = SNDRV_CHMAP_FL; 918 chmap->map[1] = SNDRV_CHMAP_FR; 919 } 920 921 chmap->channels = num_channels; 922 clock = UAC3_BADD_CS_ID9; 923 goto found_clock; 924 } 925 926 as = snd_usb_find_csint_desc(alts->extra, alts->extralen, 927 NULL, UAC_AS_GENERAL); 928 if (!as) { 929 dev_err(&dev->dev, 930 "%u:%d : UAC_AS_GENERAL descriptor not found\n", 931 iface_no, altno); 932 return NULL; 933 } 934 935 if (as->bLength < sizeof(*as)) { 936 dev_err(&dev->dev, 937 "%u:%d : invalid UAC_AS_GENERAL desc\n", 938 iface_no, altno); 939 return NULL; 940 } 941 942 cluster_id = le16_to_cpu(as->wClusterDescrID); 943 if (!cluster_id) { 944 dev_err(&dev->dev, 945 "%u:%d : no cluster descriptor\n", 946 iface_no, altno); 947 return NULL; 948 } 949 950 /* 951 * Get number of channels and channel map through 952 * High Capability Cluster Descriptor 953 * 954 * First step: get High Capability header and 955 * read size of Cluster Descriptor 956 */ 957 err = snd_usb_ctl_msg(chip->dev, 958 usb_rcvctrlpipe(chip->dev, 0), 959 UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR, 960 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, 961 cluster_id, 962 snd_usb_ctrl_intf(chip), 963 &hc_header, sizeof(hc_header)); 964 if (err < 0) 965 return ERR_PTR(err); 966 else if (err != sizeof(hc_header)) { 967 dev_err(&dev->dev, 968 "%u:%d : can't get High Capability descriptor\n", 969 iface_no, altno); 970 return ERR_PTR(-EIO); 971 } 972 973 /* 974 * Second step: allocate needed amount of memory 975 * and request Cluster Descriptor 976 */ 977 wLength = le16_to_cpu(hc_header.wLength); 978 cluster = kzalloc(wLength, GFP_KERNEL); 979 if (!cluster) 980 return ERR_PTR(-ENOMEM); 981 err = snd_usb_ctl_msg(chip->dev, 982 usb_rcvctrlpipe(chip->dev, 0), 983 UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR, 984 USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, 985 cluster_id, 986 snd_usb_ctrl_intf(chip), 987 cluster, wLength); 988 if (err < 0) { 989 kfree(cluster); 990 return ERR_PTR(err); 991 } else if (err != wLength) { 992 dev_err(&dev->dev, 993 "%u:%d : can't get Cluster Descriptor\n", 994 iface_no, altno); 995 kfree(cluster); 996 return ERR_PTR(-EIO); 997 } 998 999 num_channels = cluster->bNrChannels; 1000 chmap = convert_chmap_v3(cluster); 1001 kfree(cluster); 1002 1003 /* 1004 * lookup the terminal associated to this interface 1005 * to extract the clock 1006 */ 1007 input_term = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf, 1008 as->bTerminalLink, 1009 UAC_VERSION_3); 1010 if (input_term) { 1011 clock = input_term->bCSourceID; 1012 goto found_clock; 1013 } 1014 1015 output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf, 1016 as->bTerminalLink, 1017 UAC_VERSION_3); 1018 if (output_term) { 1019 clock = output_term->bCSourceID; 1020 goto found_clock; 1021 } 1022 1023 dev_err(&dev->dev, "%u:%d : bogus bTerminalLink %d\n", 1024 iface_no, altno, as->bTerminalLink); 1025 kfree(chmap); 1026 return NULL; 1027 1028 found_clock: 1029 fp = audio_format_alloc_init(chip, alts, UAC_VERSION_3, iface_no, 1030 altset_idx, altno, num_channels, clock); 1031 if (!fp) { 1032 kfree(chmap); 1033 return ERR_PTR(-ENOMEM); 1034 } 1035 1036 fp->chmap = chmap; 1037 1038 if (badd_profile >= UAC3_FUNCTION_SUBCLASS_GENERIC_IO) { 1039 fp->attributes = 0; /* No attributes */ 1040 1041 fp->fmt_type = UAC_FORMAT_TYPE_I; 1042 fp->formats = badd_formats; 1043 1044 fp->nr_rates = 0; /* SNDRV_PCM_RATE_CONTINUOUS */ 1045 fp->rate_min = UAC3_BADD_SAMPLING_RATE; 1046 fp->rate_max = UAC3_BADD_SAMPLING_RATE; 1047 fp->rates = SNDRV_PCM_RATE_CONTINUOUS; 1048 1049 pd = kzalloc(sizeof(*pd), GFP_KERNEL); 1050 if (!pd) { 1051 audioformat_free(fp); 1052 return NULL; 1053 } 1054 pd->pd_id = (stream == SNDRV_PCM_STREAM_PLAYBACK) ? 1055 UAC3_BADD_PD_ID10 : UAC3_BADD_PD_ID11; 1056 pd->pd_d1d0_rec = UAC3_BADD_PD_RECOVER_D1D0; 1057 pd->pd_d2d0_rec = UAC3_BADD_PD_RECOVER_D2D0; 1058 1059 } else { 1060 fp->attributes = parse_uac_endpoint_attributes(chip, alts, 1061 UAC_VERSION_3, 1062 iface_no); 1063 1064 pd = snd_usb_find_power_domain(chip->ctrl_intf, 1065 as->bTerminalLink); 1066 1067 /* ok, let's parse further... */ 1068 if (snd_usb_parse_audio_format_v3(chip, fp, as, stream) < 0) { 1069 kfree(pd); 1070 audioformat_free(fp); 1071 return NULL; 1072 } 1073 } 1074 1075 if (pd) 1076 *pd_out = pd; 1077 1078 return fp; 1079 } 1080 1081 static int __snd_usb_parse_audio_interface(struct snd_usb_audio *chip, 1082 int iface_no, 1083 bool *has_non_pcm, bool non_pcm) 1084 { 1085 struct usb_device *dev; 1086 struct usb_interface *iface; 1087 struct usb_host_interface *alts; 1088 struct usb_interface_descriptor *altsd; 1089 int i, altno, err, stream; 1090 struct audioformat *fp = NULL; 1091 struct snd_usb_power_domain *pd = NULL; 1092 int num, protocol; 1093 1094 dev = chip->dev; 1095 1096 /* parse the interface's altsettings */ 1097 iface = usb_ifnum_to_if(dev, iface_no); 1098 1099 num = iface->num_altsetting; 1100 1101 /* 1102 * Dallas DS4201 workaround: It presents 5 altsettings, but the last 1103 * one misses syncpipe, and does not produce any sound. 1104 */ 1105 if (chip->usb_id == USB_ID(0x04fa, 0x4201)) 1106 num = 4; 1107 1108 for (i = 0; i < num; i++) { 1109 alts = &iface->altsetting[i]; 1110 altsd = get_iface_desc(alts); 1111 protocol = altsd->bInterfaceProtocol; 1112 /* skip invalid one */ 1113 if (((altsd->bInterfaceClass != USB_CLASS_AUDIO || 1114 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING && 1115 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC)) && 1116 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) || 1117 altsd->bNumEndpoints < 1 || 1118 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0) 1119 continue; 1120 /* must be isochronous */ 1121 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 1122 USB_ENDPOINT_XFER_ISOC) 1123 continue; 1124 /* check direction */ 1125 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ? 1126 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK; 1127 altno = altsd->bAlternateSetting; 1128 1129 if (snd_usb_apply_interface_quirk(chip, iface_no, altno)) 1130 continue; 1131 1132 /* 1133 * Roland audio streaming interfaces are marked with protocols 1134 * 0/1/2, but are UAC 1 compatible. 1135 */ 1136 if (USB_ID_VENDOR(chip->usb_id) == 0x0582 && 1137 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC && 1138 protocol <= 2) 1139 protocol = UAC_VERSION_1; 1140 1141 switch (protocol) { 1142 default: 1143 dev_dbg(&dev->dev, "%u:%d: unknown interface protocol %#02x, assuming v1\n", 1144 iface_no, altno, protocol); 1145 protocol = UAC_VERSION_1; 1146 /* fall through */ 1147 case UAC_VERSION_1: 1148 /* fall through */ 1149 case UAC_VERSION_2: { 1150 int bm_quirk = 0; 1151 1152 /* 1153 * Blue Microphones workaround: The last altsetting is 1154 * identical with the previous one, except for a larger 1155 * packet size, but is actually a mislabeled two-channel 1156 * setting; ignore it. 1157 * 1158 * Part 1: prepare quirk flag 1159 */ 1160 if (altno == 2 && num == 3 && 1161 fp && fp->altsetting == 1 && fp->channels == 1 && 1162 fp->formats == SNDRV_PCM_FMTBIT_S16_LE && 1163 protocol == UAC_VERSION_1 && 1164 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 1165 fp->maxpacksize * 2) 1166 bm_quirk = 1; 1167 1168 fp = snd_usb_get_audioformat_uac12(chip, alts, protocol, 1169 iface_no, i, altno, 1170 stream, bm_quirk); 1171 break; 1172 } 1173 case UAC_VERSION_3: 1174 fp = snd_usb_get_audioformat_uac3(chip, alts, &pd, 1175 iface_no, i, altno, stream); 1176 break; 1177 } 1178 1179 if (!fp) 1180 continue; 1181 else if (IS_ERR(fp)) 1182 return PTR_ERR(fp); 1183 1184 if (fp->fmt_type != UAC_FORMAT_TYPE_I) 1185 *has_non_pcm = true; 1186 if ((fp->fmt_type == UAC_FORMAT_TYPE_I) == non_pcm) { 1187 audioformat_free(fp); 1188 kfree(pd); 1189 fp = NULL; 1190 pd = NULL; 1191 continue; 1192 } 1193 1194 dev_dbg(&dev->dev, "%u:%d: add audio endpoint %#x\n", iface_no, altno, fp->endpoint); 1195 if (protocol == UAC_VERSION_3) 1196 err = snd_usb_add_audio_stream_v3(chip, stream, fp, pd); 1197 else 1198 err = snd_usb_add_audio_stream(chip, stream, fp); 1199 1200 if (err < 0) { 1201 audioformat_free(fp); 1202 kfree(pd); 1203 return err; 1204 } 1205 /* try to set the interface... */ 1206 usb_set_interface(chip->dev, iface_no, altno); 1207 snd_usb_init_pitch(chip, iface_no, alts, fp); 1208 snd_usb_init_sample_rate(chip, iface_no, alts, fp, fp->rate_max); 1209 } 1210 return 0; 1211 } 1212 1213 int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no) 1214 { 1215 int err; 1216 bool has_non_pcm = false; 1217 1218 /* parse PCM formats */ 1219 err = __snd_usb_parse_audio_interface(chip, iface_no, &has_non_pcm, false); 1220 if (err < 0) 1221 return err; 1222 1223 if (has_non_pcm) { 1224 /* parse non-PCM formats */ 1225 err = __snd_usb_parse_audio_interface(chip, iface_no, &has_non_pcm, true); 1226 if (err < 0) 1227 return err; 1228 } 1229 1230 return 0; 1231 } 1232 1233