1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * oxfw_stream.c - a part of driver for OXFW970/971 based devices 4 * 5 * Copyright (c) 2014 Takashi Sakamoto 6 */ 7 8#include "oxfw.h" 9#include <linux/delay.h> 10 11#define AVC_GENERIC_FRAME_MAXIMUM_BYTES 512 12#define READY_TIMEOUT_MS 600 13 14/* 15 * According to datasheet of Oxford Semiconductor: 16 * OXFW970: 32.0/44.1/48.0/96.0 Khz, 8 audio channels I/O 17 * OXFW971: 32.0/44.1/48.0/88.2/96.0/192.0 kHz, 16 audio channels I/O, MIDI I/O 18 */ 19static const unsigned int oxfw_rate_table[] = { 20 [0] = 32000, 21 [1] = 44100, 22 [2] = 48000, 23 [3] = 88200, 24 [4] = 96000, 25 [5] = 192000, 26}; 27 28/* 29 * See Table 5.7 – Sampling frequency for Multi-bit Audio 30 * in AV/C Stream Format Information Specification 1.1 (Apr 2005, 1394TA) 31 */ 32static const unsigned int avc_stream_rate_table[] = { 33 [0] = 0x02, 34 [1] = 0x03, 35 [2] = 0x04, 36 [3] = 0x0a, 37 [4] = 0x05, 38 [5] = 0x07, 39}; 40 41static int set_rate(struct snd_oxfw *oxfw, unsigned int rate) 42{ 43 int err; 44 45 err = avc_general_set_sig_fmt(oxfw->unit, rate, 46 AVC_GENERAL_PLUG_DIR_IN, 0); 47 if (err < 0) 48 goto end; 49 50 if (oxfw->has_output) 51 err = avc_general_set_sig_fmt(oxfw->unit, rate, 52 AVC_GENERAL_PLUG_DIR_OUT, 0); 53end: 54 return err; 55} 56 57static int set_stream_format(struct snd_oxfw *oxfw, struct amdtp_stream *s, 58 unsigned int rate, unsigned int pcm_channels) 59{ 60 u8 **formats; 61 struct snd_oxfw_stream_formation formation; 62 enum avc_general_plug_dir dir; 63 unsigned int len; 64 int i, err; 65 66 if (s == &oxfw->tx_stream) { 67 formats = oxfw->tx_stream_formats; 68 dir = AVC_GENERAL_PLUG_DIR_OUT; 69 } else { 70 formats = oxfw->rx_stream_formats; 71 dir = AVC_GENERAL_PLUG_DIR_IN; 72 } 73 74 /* Seek stream format for requirements. */ 75 for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 76 err = snd_oxfw_stream_parse_format(formats[i], &formation); 77 if (err < 0) 78 return err; 79 80 if ((formation.rate == rate) && (formation.pcm == pcm_channels)) 81 break; 82 } 83 if (i == SND_OXFW_STREAM_FORMAT_ENTRIES) 84 return -EINVAL; 85 86 /* If assumed, just change rate. */ 87 if (oxfw->assumed) 88 return set_rate(oxfw, rate); 89 90 /* Calculate format length. */ 91 len = 5 + formats[i][4] * 2; 92 93 err = avc_stream_set_format(oxfw->unit, dir, 0, formats[i], len); 94 if (err < 0) 95 return err; 96 97 /* Some requests just after changing format causes freezing. */ 98 msleep(100); 99 100 return 0; 101} 102 103static int start_stream(struct snd_oxfw *oxfw, struct amdtp_stream *stream) 104{ 105 struct cmp_connection *conn; 106 int err; 107 108 if (stream == &oxfw->rx_stream) 109 conn = &oxfw->in_conn; 110 else 111 conn = &oxfw->out_conn; 112 113 err = cmp_connection_establish(conn); 114 if (err < 0) 115 return err; 116 117 err = amdtp_domain_add_stream(&oxfw->domain, stream, 118 conn->resources.channel, conn->speed); 119 if (err < 0) { 120 cmp_connection_break(conn); 121 return err; 122 } 123 124 return 0; 125} 126 127static int check_connection_used_by_others(struct snd_oxfw *oxfw, 128 struct amdtp_stream *stream) 129{ 130 struct cmp_connection *conn; 131 bool used; 132 int err; 133 134 if (stream == &oxfw->tx_stream) 135 conn = &oxfw->out_conn; 136 else 137 conn = &oxfw->in_conn; 138 139 err = cmp_connection_check_used(conn, &used); 140 if ((err >= 0) && used && !amdtp_stream_running(stream)) { 141 dev_err(&oxfw->unit->device, 142 "Connection established by others: %cPCR[%d]\n", 143 (conn->direction == CMP_OUTPUT) ? 'o' : 'i', 144 conn->pcr_index); 145 err = -EBUSY; 146 } 147 148 return err; 149} 150 151static int init_stream(struct snd_oxfw *oxfw, struct amdtp_stream *stream) 152{ 153 struct cmp_connection *conn; 154 enum cmp_direction c_dir; 155 enum amdtp_stream_direction s_dir; 156 unsigned int flags = 0; 157 int err; 158 159 if (!(oxfw->quirks & SND_OXFW_QUIRK_BLOCKING_TRANSMISSION)) 160 flags |= CIP_NONBLOCKING; 161 else 162 flags |= CIP_BLOCKING; 163 164 // OXFW 970/971 has no function to generate playback timing according to the sequence 165 // of value in syt field, thus the packet should include NO_INFO value in the field. 166 // However, some models just ignore data blocks in packet with NO_INFO for audio data 167 // processing. 168 if (!(oxfw->quirks & SND_OXFW_QUIRK_IGNORE_NO_INFO_PACKET)) 169 flags |= CIP_UNAWARE_SYT; 170 171 if (stream == &oxfw->tx_stream) { 172 conn = &oxfw->out_conn; 173 c_dir = CMP_OUTPUT; 174 s_dir = AMDTP_IN_STREAM; 175 176 if (oxfw->quirks & SND_OXFW_QUIRK_JUMBO_PAYLOAD) 177 flags |= CIP_JUMBO_PAYLOAD; 178 if (oxfw->quirks & SND_OXFW_QUIRK_WRONG_DBS) 179 flags |= CIP_WRONG_DBS; 180 } else { 181 conn = &oxfw->in_conn; 182 c_dir = CMP_INPUT; 183 s_dir = AMDTP_OUT_STREAM; 184 } 185 186 err = cmp_connection_init(conn, oxfw->unit, c_dir, 0); 187 if (err < 0) 188 return err; 189 190 err = amdtp_am824_init(stream, oxfw->unit, s_dir, flags); 191 if (err < 0) { 192 cmp_connection_destroy(conn); 193 return err; 194 } 195 196 return 0; 197} 198 199static int keep_resources(struct snd_oxfw *oxfw, struct amdtp_stream *stream) 200{ 201 enum avc_general_plug_dir dir; 202 u8 **formats; 203 struct snd_oxfw_stream_formation formation; 204 struct cmp_connection *conn; 205 int i; 206 int err; 207 208 if (stream == &oxfw->rx_stream) { 209 dir = AVC_GENERAL_PLUG_DIR_IN; 210 formats = oxfw->rx_stream_formats; 211 conn = &oxfw->in_conn; 212 } else { 213 dir = AVC_GENERAL_PLUG_DIR_OUT; 214 formats = oxfw->tx_stream_formats; 215 conn = &oxfw->out_conn; 216 } 217 218 err = snd_oxfw_stream_get_current_formation(oxfw, dir, &formation); 219 if (err < 0) 220 return err; 221 222 for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 223 struct snd_oxfw_stream_formation fmt; 224 225 if (formats[i] == NULL) 226 break; 227 228 err = snd_oxfw_stream_parse_format(formats[i], &fmt); 229 if (err < 0) 230 return err; 231 232 if (fmt.rate == formation.rate && fmt.pcm == formation.pcm && 233 fmt.midi == formation.midi) 234 break; 235 } 236 if (i == SND_OXFW_STREAM_FORMAT_ENTRIES) 237 return -EINVAL; 238 239 // The stream should have one pcm channels at least. 240 if (formation.pcm == 0) 241 return -EINVAL; 242 243 err = amdtp_am824_set_parameters(stream, formation.rate, formation.pcm, 244 formation.midi * 8, false); 245 if (err < 0) 246 return err; 247 248 return cmp_connection_reserve(conn, amdtp_stream_get_max_payload(stream)); 249} 250 251int snd_oxfw_stream_reserve_duplex(struct snd_oxfw *oxfw, 252 struct amdtp_stream *stream, 253 unsigned int rate, unsigned int pcm_channels, 254 unsigned int frames_per_period, 255 unsigned int frames_per_buffer) 256{ 257 struct snd_oxfw_stream_formation formation; 258 enum avc_general_plug_dir dir; 259 int err; 260 261 // Considering JACK/FFADO streaming: 262 // TODO: This can be removed hwdep functionality becomes popular. 263 err = check_connection_used_by_others(oxfw, &oxfw->rx_stream); 264 if (err < 0) 265 return err; 266 if (oxfw->has_output) { 267 err = check_connection_used_by_others(oxfw, &oxfw->tx_stream); 268 if (err < 0) 269 return err; 270 } 271 272 if (stream == &oxfw->tx_stream) 273 dir = AVC_GENERAL_PLUG_DIR_OUT; 274 else 275 dir = AVC_GENERAL_PLUG_DIR_IN; 276 277 err = snd_oxfw_stream_get_current_formation(oxfw, dir, &formation); 278 if (err < 0) 279 return err; 280 if (rate == 0) { 281 rate = formation.rate; 282 pcm_channels = formation.pcm; 283 } 284 if (formation.rate != rate || formation.pcm != pcm_channels) { 285 amdtp_domain_stop(&oxfw->domain); 286 287 cmp_connection_break(&oxfw->in_conn); 288 cmp_connection_release(&oxfw->in_conn); 289 290 if (oxfw->has_output) { 291 cmp_connection_break(&oxfw->out_conn); 292 cmp_connection_release(&oxfw->out_conn); 293 } 294 } 295 296 if (oxfw->substreams_count == 0 || 297 formation.rate != rate || formation.pcm != pcm_channels) { 298 err = set_stream_format(oxfw, stream, rate, pcm_channels); 299 if (err < 0) { 300 dev_err(&oxfw->unit->device, 301 "fail to set stream format: %d\n", err); 302 return err; 303 } 304 305 err = keep_resources(oxfw, &oxfw->rx_stream); 306 if (err < 0) 307 return err; 308 309 if (oxfw->has_output) { 310 err = keep_resources(oxfw, &oxfw->tx_stream); 311 if (err < 0) { 312 cmp_connection_release(&oxfw->in_conn); 313 return err; 314 } 315 } 316 317 err = amdtp_domain_set_events_per_period(&oxfw->domain, 318 frames_per_period, frames_per_buffer); 319 if (err < 0) { 320 cmp_connection_release(&oxfw->in_conn); 321 if (oxfw->has_output) 322 cmp_connection_release(&oxfw->out_conn); 323 return err; 324 } 325 } 326 327 return 0; 328} 329 330int snd_oxfw_stream_start_duplex(struct snd_oxfw *oxfw) 331{ 332 int err; 333 334 if (oxfw->substreams_count == 0) 335 return -EIO; 336 337 if (amdtp_streaming_error(&oxfw->rx_stream) || 338 amdtp_streaming_error(&oxfw->tx_stream)) { 339 amdtp_domain_stop(&oxfw->domain); 340 341 cmp_connection_break(&oxfw->in_conn); 342 if (oxfw->has_output) 343 cmp_connection_break(&oxfw->out_conn); 344 } 345 346 if (!amdtp_stream_running(&oxfw->rx_stream)) { 347 unsigned int tx_init_skip_cycles = 0; 348 bool replay_seq = false; 349 350 err = start_stream(oxfw, &oxfw->rx_stream); 351 if (err < 0) { 352 dev_err(&oxfw->unit->device, 353 "fail to prepare rx stream: %d\n", err); 354 goto error; 355 } 356 357 if (oxfw->has_output && 358 !amdtp_stream_running(&oxfw->tx_stream)) { 359 err = start_stream(oxfw, &oxfw->tx_stream); 360 if (err < 0) { 361 dev_err(&oxfw->unit->device, 362 "fail to prepare tx stream: %d\n", err); 363 goto error; 364 } 365 366 if (oxfw->quirks & SND_OXFW_QUIRK_JUMBO_PAYLOAD) { 367 // Just after changing sampling transfer frequency, many cycles are 368 // skipped for packet transmission. 369 tx_init_skip_cycles = 400; 370 } else if (oxfw->quirks & SND_OXFW_QUIRK_VOLUNTARY_RECOVERY) { 371 // It takes a bit time for target device to adjust event frequency 372 // according to nominal event frequency in isochronous packets from 373 // ALSA oxfw driver. 374 tx_init_skip_cycles = 4000; 375 } else { 376 replay_seq = true; 377 } 378 } 379 380 // NOTE: The device ignores presentation time expressed by the value of syt field 381 // of CIP header in received packets. The sequence of the number of data blocks per 382 // packet is important for media clock recovery. 383 err = amdtp_domain_start(&oxfw->domain, tx_init_skip_cycles, replay_seq, false); 384 if (err < 0) 385 goto error; 386 387 if (!amdtp_domain_wait_ready(&oxfw->domain, READY_TIMEOUT_MS)) { 388 err = -ETIMEDOUT; 389 goto error; 390 } 391 } 392 393 return 0; 394error: 395 amdtp_domain_stop(&oxfw->domain); 396 397 cmp_connection_break(&oxfw->in_conn); 398 if (oxfw->has_output) 399 cmp_connection_break(&oxfw->out_conn); 400 401 return err; 402} 403 404void snd_oxfw_stream_stop_duplex(struct snd_oxfw *oxfw) 405{ 406 if (oxfw->substreams_count == 0) { 407 amdtp_domain_stop(&oxfw->domain); 408 409 cmp_connection_break(&oxfw->in_conn); 410 cmp_connection_release(&oxfw->in_conn); 411 412 if (oxfw->has_output) { 413 cmp_connection_break(&oxfw->out_conn); 414 cmp_connection_release(&oxfw->out_conn); 415 } 416 } 417} 418 419static void destroy_stream(struct snd_oxfw *oxfw, struct amdtp_stream *stream) 420{ 421 struct cmp_connection *conn; 422 423 if (stream == &oxfw->tx_stream) 424 conn = &oxfw->out_conn; 425 else 426 conn = &oxfw->in_conn; 427 428 amdtp_stream_destroy(stream); 429 cmp_connection_destroy(conn); 430} 431 432int snd_oxfw_stream_init_duplex(struct snd_oxfw *oxfw) 433{ 434 int err; 435 436 err = init_stream(oxfw, &oxfw->rx_stream); 437 if (err < 0) 438 return err; 439 440 if (oxfw->has_output) { 441 err = init_stream(oxfw, &oxfw->tx_stream); 442 if (err < 0) { 443 destroy_stream(oxfw, &oxfw->rx_stream); 444 return err; 445 } 446 } 447 448 err = amdtp_domain_init(&oxfw->domain); 449 if (err < 0) { 450 destroy_stream(oxfw, &oxfw->rx_stream); 451 if (oxfw->has_output) 452 destroy_stream(oxfw, &oxfw->tx_stream); 453 } 454 455 return err; 456} 457 458// This function should be called before starting the stream or after stopping 459// the streams. 460void snd_oxfw_stream_destroy_duplex(struct snd_oxfw *oxfw) 461{ 462 amdtp_domain_destroy(&oxfw->domain); 463 464 destroy_stream(oxfw, &oxfw->rx_stream); 465 466 if (oxfw->has_output) 467 destroy_stream(oxfw, &oxfw->tx_stream); 468} 469 470void snd_oxfw_stream_update_duplex(struct snd_oxfw *oxfw) 471{ 472 amdtp_domain_stop(&oxfw->domain); 473 474 cmp_connection_break(&oxfw->in_conn); 475 476 amdtp_stream_pcm_abort(&oxfw->rx_stream); 477 478 if (oxfw->has_output) { 479 cmp_connection_break(&oxfw->out_conn); 480 481 amdtp_stream_pcm_abort(&oxfw->tx_stream); 482 } 483} 484 485int snd_oxfw_stream_get_current_formation(struct snd_oxfw *oxfw, 486 enum avc_general_plug_dir dir, 487 struct snd_oxfw_stream_formation *formation) 488{ 489 u8 *format; 490 unsigned int len; 491 int err; 492 493 len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; 494 format = kmalloc(len, GFP_KERNEL); 495 if (format == NULL) 496 return -ENOMEM; 497 498 err = avc_stream_get_format_single(oxfw->unit, dir, 0, format, &len); 499 if (err < 0) 500 goto end; 501 if (len < 3) { 502 err = -EIO; 503 goto end; 504 } 505 506 err = snd_oxfw_stream_parse_format(format, formation); 507end: 508 kfree(format); 509 return err; 510} 511 512/* 513 * See Table 6.16 - AM824 Stream Format 514 * Figure 6.19 - format_information field for AM824 Compound 515 * in AV/C Stream Format Information Specification 1.1 (Apr 2005, 1394TA) 516 * Also 'Clause 12 AM824 sequence adaption layers' in IEC 61883-6:2005 517 */ 518int snd_oxfw_stream_parse_format(u8 *format, 519 struct snd_oxfw_stream_formation *formation) 520{ 521 unsigned int i, e, channels, type; 522 523 memset(formation, 0, sizeof(struct snd_oxfw_stream_formation)); 524 525 /* 526 * this module can support a hierarchy combination that: 527 * Root: Audio and Music (0x90) 528 * Level 1: AM824 Compound (0x40) 529 */ 530 if ((format[0] != 0x90) || (format[1] != 0x40)) 531 return -ENXIO; 532 533 /* check the sampling rate */ 534 for (i = 0; i < ARRAY_SIZE(avc_stream_rate_table); i++) { 535 if (format[2] == avc_stream_rate_table[i]) 536 break; 537 } 538 if (i == ARRAY_SIZE(avc_stream_rate_table)) 539 return -ENXIO; 540 541 formation->rate = oxfw_rate_table[i]; 542 543 for (e = 0; e < format[4]; e++) { 544 channels = format[5 + e * 2]; 545 type = format[6 + e * 2]; 546 547 switch (type) { 548 /* IEC 60958 Conformant, currently handled as MBLA */ 549 case 0x00: 550 /* Multi Bit Linear Audio (Raw) */ 551 case 0x06: 552 formation->pcm += channels; 553 break; 554 /* MIDI Conformant */ 555 case 0x0d: 556 formation->midi = channels; 557 break; 558 /* IEC 61937-3 to 7 */ 559 case 0x01: 560 case 0x02: 561 case 0x03: 562 case 0x04: 563 case 0x05: 564 /* Multi Bit Linear Audio */ 565 case 0x07: /* DVD-Audio */ 566 case 0x0c: /* High Precision */ 567 /* One Bit Audio */ 568 case 0x08: /* (Plain) Raw */ 569 case 0x09: /* (Plain) SACD */ 570 case 0x0a: /* (Encoded) Raw */ 571 case 0x0b: /* (Encoded) SACD */ 572 /* SMPTE Time-Code conformant */ 573 case 0x0e: 574 /* Sample Count */ 575 case 0x0f: 576 /* Anciliary Data */ 577 case 0x10: 578 /* Synchronization Stream (Stereo Raw audio) */ 579 case 0x40: 580 /* Don't care */ 581 case 0xff: 582 default: 583 return -ENXIO; /* not supported */ 584 } 585 } 586 587 if (formation->pcm > AM824_MAX_CHANNELS_FOR_PCM || 588 formation->midi > AM824_MAX_CHANNELS_FOR_MIDI) 589 return -ENXIO; 590 591 return 0; 592} 593 594static int 595assume_stream_formats(struct snd_oxfw *oxfw, enum avc_general_plug_dir dir, 596 unsigned int pid, u8 *buf, unsigned int *len, 597 u8 **formats) 598{ 599 struct snd_oxfw_stream_formation formation; 600 unsigned int i, eid; 601 int err; 602 603 /* get format at current sampling rate */ 604 err = avc_stream_get_format_single(oxfw->unit, dir, pid, buf, len); 605 if (err < 0) { 606 dev_err(&oxfw->unit->device, 607 "fail to get current stream format for isoc %s plug %d:%d\n", 608 (dir == AVC_GENERAL_PLUG_DIR_IN) ? "in" : "out", 609 pid, err); 610 goto end; 611 } 612 613 /* parse and set stream format */ 614 eid = 0; 615 err = snd_oxfw_stream_parse_format(buf, &formation); 616 if (err < 0) 617 goto end; 618 619 formats[eid] = devm_kmemdup(&oxfw->card->card_dev, buf, *len, 620 GFP_KERNEL); 621 if (!formats[eid]) { 622 err = -ENOMEM; 623 goto end; 624 } 625 626 /* apply the format for each available sampling rate */ 627 for (i = 0; i < ARRAY_SIZE(oxfw_rate_table); i++) { 628 if (formation.rate == oxfw_rate_table[i]) 629 continue; 630 631 err = avc_general_inquiry_sig_fmt(oxfw->unit, 632 oxfw_rate_table[i], 633 dir, pid); 634 if (err < 0) 635 continue; 636 637 eid++; 638 formats[eid] = devm_kmemdup(&oxfw->card->card_dev, buf, *len, 639 GFP_KERNEL); 640 if (formats[eid] == NULL) { 641 err = -ENOMEM; 642 goto end; 643 } 644 formats[eid][2] = avc_stream_rate_table[i]; 645 } 646 647 err = 0; 648 oxfw->assumed = true; 649end: 650 return err; 651} 652 653static int fill_stream_formats(struct snd_oxfw *oxfw, 654 enum avc_general_plug_dir dir, 655 unsigned short pid) 656{ 657 u8 *buf, **formats; 658 unsigned int len, eid = 0; 659 struct snd_oxfw_stream_formation dummy; 660 int err; 661 662 buf = kmalloc(AVC_GENERIC_FRAME_MAXIMUM_BYTES, GFP_KERNEL); 663 if (buf == NULL) 664 return -ENOMEM; 665 666 if (dir == AVC_GENERAL_PLUG_DIR_OUT) 667 formats = oxfw->tx_stream_formats; 668 else 669 formats = oxfw->rx_stream_formats; 670 671 /* get first entry */ 672 len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; 673 err = avc_stream_get_format_list(oxfw->unit, dir, 0, buf, &len, 0); 674 if (err == -ENXIO) { 675 /* LIST subfunction is not implemented */ 676 len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; 677 err = assume_stream_formats(oxfw, dir, pid, buf, &len, 678 formats); 679 goto end; 680 } else if (err < 0) { 681 dev_err(&oxfw->unit->device, 682 "fail to get stream format %d for isoc %s plug %d:%d\n", 683 eid, (dir == AVC_GENERAL_PLUG_DIR_IN) ? "in" : "out", 684 pid, err); 685 goto end; 686 } 687 688 /* LIST subfunction is implemented */ 689 while (eid < SND_OXFW_STREAM_FORMAT_ENTRIES) { 690 /* The format is too short. */ 691 if (len < 3) { 692 err = -EIO; 693 break; 694 } 695 696 /* parse and set stream format */ 697 err = snd_oxfw_stream_parse_format(buf, &dummy); 698 if (err < 0) 699 break; 700 701 formats[eid] = devm_kmemdup(&oxfw->card->card_dev, buf, len, 702 GFP_KERNEL); 703 if (!formats[eid]) { 704 err = -ENOMEM; 705 break; 706 } 707 708 /* get next entry */ 709 len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; 710 err = avc_stream_get_format_list(oxfw->unit, dir, 0, 711 buf, &len, ++eid); 712 /* No entries remained. */ 713 if (err == -EINVAL) { 714 err = 0; 715 break; 716 } else if (err < 0) { 717 dev_err(&oxfw->unit->device, 718 "fail to get stream format %d for isoc %s plug %d:%d\n", 719 eid, (dir == AVC_GENERAL_PLUG_DIR_IN) ? "in" : 720 "out", 721 pid, err); 722 break; 723 } 724 } 725end: 726 kfree(buf); 727 return err; 728} 729 730int snd_oxfw_stream_discover(struct snd_oxfw *oxfw) 731{ 732 u8 plugs[AVC_PLUG_INFO_BUF_BYTES]; 733 struct snd_oxfw_stream_formation formation; 734 u8 *format; 735 unsigned int i; 736 int err; 737 738 /* the number of plugs for isoc in/out, ext in/out */ 739 err = avc_general_get_plug_info(oxfw->unit, 0x1f, 0x07, 0x00, plugs); 740 if (err < 0) { 741 dev_err(&oxfw->unit->device, 742 "fail to get info for isoc/external in/out plugs: %d\n", 743 err); 744 goto end; 745 } else if ((plugs[0] == 0) && (plugs[1] == 0)) { 746 err = -ENXIO; 747 goto end; 748 } 749 750 /* use oPCR[0] if exists */ 751 if (plugs[1] > 0) { 752 err = fill_stream_formats(oxfw, AVC_GENERAL_PLUG_DIR_OUT, 0); 753 if (err < 0) { 754 if (err != -ENXIO) 755 return err; 756 757 // The oPCR is not available for isoc communication. 758 err = 0; 759 } else { 760 for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 761 format = oxfw->tx_stream_formats[i]; 762 if (format == NULL) 763 continue; 764 err = snd_oxfw_stream_parse_format(format, 765 &formation); 766 if (err < 0) 767 continue; 768 769 /* Add one MIDI port. */ 770 if (formation.midi > 0) 771 oxfw->midi_input_ports = 1; 772 } 773 774 oxfw->has_output = true; 775 } 776 } 777 778 /* use iPCR[0] if exists */ 779 if (plugs[0] > 0) { 780 err = fill_stream_formats(oxfw, AVC_GENERAL_PLUG_DIR_IN, 0); 781 if (err < 0) { 782 if (err != -ENXIO) 783 return err; 784 785 // The iPCR is not available for isoc communication. 786 err = 0; 787 } else { 788 for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 789 format = oxfw->rx_stream_formats[i]; 790 if (format == NULL) 791 continue; 792 err = snd_oxfw_stream_parse_format(format, 793 &formation); 794 if (err < 0) 795 continue; 796 797 /* Add one MIDI port. */ 798 if (formation.midi > 0) 799 oxfw->midi_output_ports = 1; 800 } 801 802 oxfw->has_input = true; 803 } 804 } 805end: 806 return err; 807} 808 809void snd_oxfw_stream_lock_changed(struct snd_oxfw *oxfw) 810{ 811 oxfw->dev_lock_changed = true; 812 wake_up(&oxfw->hwdep_wait); 813} 814 815int snd_oxfw_stream_lock_try(struct snd_oxfw *oxfw) 816{ 817 int err; 818 819 spin_lock_irq(&oxfw->lock); 820 821 /* user land lock this */ 822 if (oxfw->dev_lock_count < 0) { 823 err = -EBUSY; 824 goto end; 825 } 826 827 /* this is the first time */ 828 if (oxfw->dev_lock_count++ == 0) 829 snd_oxfw_stream_lock_changed(oxfw); 830 err = 0; 831end: 832 spin_unlock_irq(&oxfw->lock); 833 return err; 834} 835 836void snd_oxfw_stream_lock_release(struct snd_oxfw *oxfw) 837{ 838 spin_lock_irq(&oxfw->lock); 839 840 if (WARN_ON(oxfw->dev_lock_count <= 0)) 841 goto end; 842 if (--oxfw->dev_lock_count == 0) 843 snd_oxfw_stream_lock_changed(oxfw); 844end: 845 spin_unlock_irq(&oxfw->lock); 846} 847