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 200 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 */ 19 static 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 */ 32 static 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 41 static 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); 53 end: 54 return err; 55 } 56 57 static 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 } 102 103 static 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 } 126 127 static 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 } 150 151 static 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 } 198 199 static 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 } 250 251 int 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 } 329 330 int 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 { 371 replay_seq = true; 372 } 373 } 374 375 // NOTE: The device ignores presentation time expressed by the value of syt field 376 // of CIP header in received packets. The sequence of the number of data blocks per 377 // packet is important for media clock recovery. 378 err = amdtp_domain_start(&oxfw->domain, tx_init_skip_cycles, replay_seq, false); 379 if (err < 0) 380 goto error; 381 382 if (!amdtp_domain_wait_ready(&oxfw->domain, READY_TIMEOUT_MS)) { 383 err = -ETIMEDOUT; 384 goto error; 385 } 386 } 387 388 return 0; 389 error: 390 amdtp_domain_stop(&oxfw->domain); 391 392 cmp_connection_break(&oxfw->in_conn); 393 if (oxfw->has_output) 394 cmp_connection_break(&oxfw->out_conn); 395 396 return err; 397 } 398 399 void snd_oxfw_stream_stop_duplex(struct snd_oxfw *oxfw) 400 { 401 if (oxfw->substreams_count == 0) { 402 amdtp_domain_stop(&oxfw->domain); 403 404 cmp_connection_break(&oxfw->in_conn); 405 cmp_connection_release(&oxfw->in_conn); 406 407 if (oxfw->has_output) { 408 cmp_connection_break(&oxfw->out_conn); 409 cmp_connection_release(&oxfw->out_conn); 410 } 411 } 412 } 413 414 static void destroy_stream(struct snd_oxfw *oxfw, struct amdtp_stream *stream) 415 { 416 struct cmp_connection *conn; 417 418 if (stream == &oxfw->tx_stream) 419 conn = &oxfw->out_conn; 420 else 421 conn = &oxfw->in_conn; 422 423 amdtp_stream_destroy(stream); 424 cmp_connection_destroy(conn); 425 } 426 427 int snd_oxfw_stream_init_duplex(struct snd_oxfw *oxfw) 428 { 429 int err; 430 431 err = init_stream(oxfw, &oxfw->rx_stream); 432 if (err < 0) 433 return err; 434 435 if (oxfw->has_output) { 436 err = init_stream(oxfw, &oxfw->tx_stream); 437 if (err < 0) { 438 destroy_stream(oxfw, &oxfw->rx_stream); 439 return err; 440 } 441 } 442 443 err = amdtp_domain_init(&oxfw->domain); 444 if (err < 0) { 445 destroy_stream(oxfw, &oxfw->rx_stream); 446 if (oxfw->has_output) 447 destroy_stream(oxfw, &oxfw->tx_stream); 448 } 449 450 return err; 451 } 452 453 // This function should be called before starting the stream or after stopping 454 // the streams. 455 void snd_oxfw_stream_destroy_duplex(struct snd_oxfw *oxfw) 456 { 457 amdtp_domain_destroy(&oxfw->domain); 458 459 destroy_stream(oxfw, &oxfw->rx_stream); 460 461 if (oxfw->has_output) 462 destroy_stream(oxfw, &oxfw->tx_stream); 463 } 464 465 void snd_oxfw_stream_update_duplex(struct snd_oxfw *oxfw) 466 { 467 amdtp_domain_stop(&oxfw->domain); 468 469 cmp_connection_break(&oxfw->in_conn); 470 471 amdtp_stream_pcm_abort(&oxfw->rx_stream); 472 473 if (oxfw->has_output) { 474 cmp_connection_break(&oxfw->out_conn); 475 476 amdtp_stream_pcm_abort(&oxfw->tx_stream); 477 } 478 } 479 480 int snd_oxfw_stream_get_current_formation(struct snd_oxfw *oxfw, 481 enum avc_general_plug_dir dir, 482 struct snd_oxfw_stream_formation *formation) 483 { 484 u8 *format; 485 unsigned int len; 486 int err; 487 488 len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; 489 format = kmalloc(len, GFP_KERNEL); 490 if (format == NULL) 491 return -ENOMEM; 492 493 err = avc_stream_get_format_single(oxfw->unit, dir, 0, format, &len); 494 if (err < 0) 495 goto end; 496 if (len < 3) { 497 err = -EIO; 498 goto end; 499 } 500 501 err = snd_oxfw_stream_parse_format(format, formation); 502 end: 503 kfree(format); 504 return err; 505 } 506 507 /* 508 * See Table 6.16 - AM824 Stream Format 509 * Figure 6.19 - format_information field for AM824 Compound 510 * in AV/C Stream Format Information Specification 1.1 (Apr 2005, 1394TA) 511 * Also 'Clause 12 AM824 sequence adaption layers' in IEC 61883-6:2005 512 */ 513 int snd_oxfw_stream_parse_format(u8 *format, 514 struct snd_oxfw_stream_formation *formation) 515 { 516 unsigned int i, e, channels, type; 517 518 memset(formation, 0, sizeof(struct snd_oxfw_stream_formation)); 519 520 /* 521 * this module can support a hierarchy combination that: 522 * Root: Audio and Music (0x90) 523 * Level 1: AM824 Compound (0x40) 524 */ 525 if ((format[0] != 0x90) || (format[1] != 0x40)) 526 return -ENXIO; 527 528 /* check the sampling rate */ 529 for (i = 0; i < ARRAY_SIZE(avc_stream_rate_table); i++) { 530 if (format[2] == avc_stream_rate_table[i]) 531 break; 532 } 533 if (i == ARRAY_SIZE(avc_stream_rate_table)) 534 return -ENXIO; 535 536 formation->rate = oxfw_rate_table[i]; 537 538 for (e = 0; e < format[4]; e++) { 539 channels = format[5 + e * 2]; 540 type = format[6 + e * 2]; 541 542 switch (type) { 543 /* IEC 60958 Conformant, currently handled as MBLA */ 544 case 0x00: 545 /* Multi Bit Linear Audio (Raw) */ 546 case 0x06: 547 formation->pcm += channels; 548 break; 549 /* MIDI Conformant */ 550 case 0x0d: 551 formation->midi = channels; 552 break; 553 /* IEC 61937-3 to 7 */ 554 case 0x01: 555 case 0x02: 556 case 0x03: 557 case 0x04: 558 case 0x05: 559 /* Multi Bit Linear Audio */ 560 case 0x07: /* DVD-Audio */ 561 case 0x0c: /* High Precision */ 562 /* One Bit Audio */ 563 case 0x08: /* (Plain) Raw */ 564 case 0x09: /* (Plain) SACD */ 565 case 0x0a: /* (Encoded) Raw */ 566 case 0x0b: /* (Encoded) SACD */ 567 /* SMPTE Time-Code conformant */ 568 case 0x0e: 569 /* Sample Count */ 570 case 0x0f: 571 /* Anciliary Data */ 572 case 0x10: 573 /* Synchronization Stream (Stereo Raw audio) */ 574 case 0x40: 575 /* Don't care */ 576 case 0xff: 577 default: 578 return -ENXIO; /* not supported */ 579 } 580 } 581 582 if (formation->pcm > AM824_MAX_CHANNELS_FOR_PCM || 583 formation->midi > AM824_MAX_CHANNELS_FOR_MIDI) 584 return -ENXIO; 585 586 return 0; 587 } 588 589 static int 590 assume_stream_formats(struct snd_oxfw *oxfw, enum avc_general_plug_dir dir, 591 unsigned int pid, u8 *buf, unsigned int *len, 592 u8 **formats) 593 { 594 struct snd_oxfw_stream_formation formation; 595 unsigned int i, eid; 596 int err; 597 598 /* get format at current sampling rate */ 599 err = avc_stream_get_format_single(oxfw->unit, dir, pid, buf, len); 600 if (err < 0) { 601 dev_err(&oxfw->unit->device, 602 "fail to get current stream format for isoc %s plug %d:%d\n", 603 (dir == AVC_GENERAL_PLUG_DIR_IN) ? "in" : "out", 604 pid, err); 605 goto end; 606 } 607 608 /* parse and set stream format */ 609 eid = 0; 610 err = snd_oxfw_stream_parse_format(buf, &formation); 611 if (err < 0) 612 goto end; 613 614 formats[eid] = devm_kmemdup(&oxfw->card->card_dev, buf, *len, 615 GFP_KERNEL); 616 if (!formats[eid]) { 617 err = -ENOMEM; 618 goto end; 619 } 620 621 /* apply the format for each available sampling rate */ 622 for (i = 0; i < ARRAY_SIZE(oxfw_rate_table); i++) { 623 if (formation.rate == oxfw_rate_table[i]) 624 continue; 625 626 err = avc_general_inquiry_sig_fmt(oxfw->unit, 627 oxfw_rate_table[i], 628 dir, pid); 629 if (err < 0) 630 continue; 631 632 eid++; 633 formats[eid] = devm_kmemdup(&oxfw->card->card_dev, buf, *len, 634 GFP_KERNEL); 635 if (formats[eid] == NULL) { 636 err = -ENOMEM; 637 goto end; 638 } 639 formats[eid][2] = avc_stream_rate_table[i]; 640 } 641 642 err = 0; 643 oxfw->assumed = true; 644 end: 645 return err; 646 } 647 648 static int fill_stream_formats(struct snd_oxfw *oxfw, 649 enum avc_general_plug_dir dir, 650 unsigned short pid) 651 { 652 u8 *buf, **formats; 653 unsigned int len, eid = 0; 654 struct snd_oxfw_stream_formation dummy; 655 int err; 656 657 buf = kmalloc(AVC_GENERIC_FRAME_MAXIMUM_BYTES, GFP_KERNEL); 658 if (buf == NULL) 659 return -ENOMEM; 660 661 if (dir == AVC_GENERAL_PLUG_DIR_OUT) 662 formats = oxfw->tx_stream_formats; 663 else 664 formats = oxfw->rx_stream_formats; 665 666 /* get first entry */ 667 len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; 668 err = avc_stream_get_format_list(oxfw->unit, dir, 0, buf, &len, 0); 669 if (err == -ENXIO) { 670 /* LIST subfunction is not implemented */ 671 len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; 672 err = assume_stream_formats(oxfw, dir, pid, buf, &len, 673 formats); 674 goto end; 675 } else if (err < 0) { 676 dev_err(&oxfw->unit->device, 677 "fail to get stream format %d for isoc %s plug %d:%d\n", 678 eid, (dir == AVC_GENERAL_PLUG_DIR_IN) ? "in" : "out", 679 pid, err); 680 goto end; 681 } 682 683 /* LIST subfunction is implemented */ 684 while (eid < SND_OXFW_STREAM_FORMAT_ENTRIES) { 685 /* The format is too short. */ 686 if (len < 3) { 687 err = -EIO; 688 break; 689 } 690 691 /* parse and set stream format */ 692 err = snd_oxfw_stream_parse_format(buf, &dummy); 693 if (err < 0) 694 break; 695 696 formats[eid] = devm_kmemdup(&oxfw->card->card_dev, buf, len, 697 GFP_KERNEL); 698 if (!formats[eid]) { 699 err = -ENOMEM; 700 break; 701 } 702 703 /* get next entry */ 704 len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; 705 err = avc_stream_get_format_list(oxfw->unit, dir, 0, 706 buf, &len, ++eid); 707 /* No entries remained. */ 708 if (err == -EINVAL) { 709 err = 0; 710 break; 711 } else if (err < 0) { 712 dev_err(&oxfw->unit->device, 713 "fail to get stream format %d for isoc %s plug %d:%d\n", 714 eid, (dir == AVC_GENERAL_PLUG_DIR_IN) ? "in" : 715 "out", 716 pid, err); 717 break; 718 } 719 } 720 end: 721 kfree(buf); 722 return err; 723 } 724 725 int snd_oxfw_stream_discover(struct snd_oxfw *oxfw) 726 { 727 u8 plugs[AVC_PLUG_INFO_BUF_BYTES]; 728 struct snd_oxfw_stream_formation formation; 729 u8 *format; 730 unsigned int i; 731 int err; 732 733 /* the number of plugs for isoc in/out, ext in/out */ 734 err = avc_general_get_plug_info(oxfw->unit, 0x1f, 0x07, 0x00, plugs); 735 if (err < 0) { 736 dev_err(&oxfw->unit->device, 737 "fail to get info for isoc/external in/out plugs: %d\n", 738 err); 739 goto end; 740 } else if ((plugs[0] == 0) && (plugs[1] == 0)) { 741 err = -ENXIO; 742 goto end; 743 } 744 745 /* use oPCR[0] if exists */ 746 if (plugs[1] > 0) { 747 err = fill_stream_formats(oxfw, AVC_GENERAL_PLUG_DIR_OUT, 0); 748 if (err < 0) { 749 if (err != -ENXIO) 750 return err; 751 752 // The oPCR is not available for isoc communication. 753 err = 0; 754 } else { 755 for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 756 format = oxfw->tx_stream_formats[i]; 757 if (format == NULL) 758 continue; 759 err = snd_oxfw_stream_parse_format(format, 760 &formation); 761 if (err < 0) 762 continue; 763 764 /* Add one MIDI port. */ 765 if (formation.midi > 0) 766 oxfw->midi_input_ports = 1; 767 } 768 769 oxfw->has_output = true; 770 } 771 } 772 773 /* use iPCR[0] if exists */ 774 if (plugs[0] > 0) { 775 err = fill_stream_formats(oxfw, AVC_GENERAL_PLUG_DIR_IN, 0); 776 if (err < 0) { 777 if (err != -ENXIO) 778 return err; 779 780 // The iPCR is not available for isoc communication. 781 err = 0; 782 } else { 783 for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 784 format = oxfw->rx_stream_formats[i]; 785 if (format == NULL) 786 continue; 787 err = snd_oxfw_stream_parse_format(format, 788 &formation); 789 if (err < 0) 790 continue; 791 792 /* Add one MIDI port. */ 793 if (formation.midi > 0) 794 oxfw->midi_output_ports = 1; 795 } 796 797 oxfw->has_input = true; 798 } 799 } 800 end: 801 return err; 802 } 803 804 void snd_oxfw_stream_lock_changed(struct snd_oxfw *oxfw) 805 { 806 oxfw->dev_lock_changed = true; 807 wake_up(&oxfw->hwdep_wait); 808 } 809 810 int snd_oxfw_stream_lock_try(struct snd_oxfw *oxfw) 811 { 812 int err; 813 814 spin_lock_irq(&oxfw->lock); 815 816 /* user land lock this */ 817 if (oxfw->dev_lock_count < 0) { 818 err = -EBUSY; 819 goto end; 820 } 821 822 /* this is the first time */ 823 if (oxfw->dev_lock_count++ == 0) 824 snd_oxfw_stream_lock_changed(oxfw); 825 err = 0; 826 end: 827 spin_unlock_irq(&oxfw->lock); 828 return err; 829 } 830 831 void snd_oxfw_stream_lock_release(struct snd_oxfw *oxfw) 832 { 833 spin_lock_irq(&oxfw->lock); 834 835 if (WARN_ON(oxfw->dev_lock_count <= 0)) 836 goto end; 837 if (--oxfw->dev_lock_count == 0) 838 snd_oxfw_stream_lock_changed(oxfw); 839 end: 840 spin_unlock_irq(&oxfw->lock); 841 } 842