1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * bebob_stream.c - a part of driver for BeBoB based devices 4 * 5 * Copyright (c) 2013-2014 Takashi Sakamoto 6 */ 7 8 #include "./bebob.h" 9 10 #define CALLBACK_TIMEOUT 2000 11 #define FW_ISO_RESOURCE_DELAY 1000 12 13 /* 14 * NOTE; 15 * For BeBoB streams, Both of input and output CMP connection are important. 16 * 17 * For most devices, each CMP connection starts to transmit/receive a 18 * corresponding stream. But for a few devices, both of CMP connection needs 19 * to start transmitting stream. An example is 'M-Audio Firewire 410'. 20 */ 21 22 /* 128 is an arbitrary length but it seems to be enough */ 23 #define FORMAT_MAXIMUM_LENGTH 128 24 25 const unsigned int snd_bebob_rate_table[SND_BEBOB_STRM_FMT_ENTRIES] = { 26 [0] = 32000, 27 [1] = 44100, 28 [2] = 48000, 29 [3] = 88200, 30 [4] = 96000, 31 [5] = 176400, 32 [6] = 192000, 33 }; 34 35 /* 36 * See: Table 51: Extended Stream Format Info ‘Sampling Frequency’ 37 * in Additional AVC commands (Nov 2003, BridgeCo) 38 */ 39 static const unsigned int bridgeco_freq_table[] = { 40 [0] = 0x02, 41 [1] = 0x03, 42 [2] = 0x04, 43 [3] = 0x0a, 44 [4] = 0x05, 45 [5] = 0x06, 46 [6] = 0x07, 47 }; 48 49 static int 50 get_formation_index(unsigned int rate, unsigned int *index) 51 { 52 unsigned int i; 53 54 for (i = 0; i < ARRAY_SIZE(snd_bebob_rate_table); i++) { 55 if (snd_bebob_rate_table[i] == rate) { 56 *index = i; 57 return 0; 58 } 59 } 60 return -EINVAL; 61 } 62 63 int 64 snd_bebob_stream_get_rate(struct snd_bebob *bebob, unsigned int *curr_rate) 65 { 66 unsigned int tx_rate, rx_rate, trials; 67 int err; 68 69 trials = 0; 70 do { 71 err = avc_general_get_sig_fmt(bebob->unit, &tx_rate, 72 AVC_GENERAL_PLUG_DIR_OUT, 0); 73 } while (err == -EAGAIN && ++trials < 3); 74 if (err < 0) 75 goto end; 76 77 trials = 0; 78 do { 79 err = avc_general_get_sig_fmt(bebob->unit, &rx_rate, 80 AVC_GENERAL_PLUG_DIR_IN, 0); 81 } while (err == -EAGAIN && ++trials < 3); 82 if (err < 0) 83 goto end; 84 85 *curr_rate = rx_rate; 86 if (rx_rate == tx_rate) 87 goto end; 88 89 /* synchronize receive stream rate to transmit stream rate */ 90 err = avc_general_set_sig_fmt(bebob->unit, rx_rate, 91 AVC_GENERAL_PLUG_DIR_IN, 0); 92 end: 93 return err; 94 } 95 96 int 97 snd_bebob_stream_set_rate(struct snd_bebob *bebob, unsigned int rate) 98 { 99 int err; 100 101 err = avc_general_set_sig_fmt(bebob->unit, rate, 102 AVC_GENERAL_PLUG_DIR_OUT, 0); 103 if (err < 0) 104 goto end; 105 106 err = avc_general_set_sig_fmt(bebob->unit, rate, 107 AVC_GENERAL_PLUG_DIR_IN, 0); 108 if (err < 0) 109 goto end; 110 111 /* 112 * Some devices need a bit time for transition. 113 * 300msec is got by some experiments. 114 */ 115 msleep(300); 116 end: 117 return err; 118 } 119 120 int snd_bebob_stream_get_clock_src(struct snd_bebob *bebob, 121 enum snd_bebob_clock_type *src) 122 { 123 const struct snd_bebob_clock_spec *clk_spec = bebob->spec->clock; 124 u8 addr[AVC_BRIDGECO_ADDR_BYTES], input[7]; 125 unsigned int id; 126 enum avc_bridgeco_plug_type type; 127 int err = 0; 128 129 /* 1.The device has its own operation to switch source of clock */ 130 if (clk_spec) { 131 err = clk_spec->get(bebob, &id); 132 if (err < 0) { 133 dev_err(&bebob->unit->device, 134 "fail to get clock source: %d\n", err); 135 goto end; 136 } 137 138 if (id >= clk_spec->num) { 139 dev_err(&bebob->unit->device, 140 "clock source %d out of range 0..%d\n", 141 id, clk_spec->num - 1); 142 err = -EIO; 143 goto end; 144 } 145 146 *src = clk_spec->types[id]; 147 goto end; 148 } 149 150 /* 151 * 2.The device don't support to switch source of clock then assumed 152 * to use internal clock always 153 */ 154 if (bebob->sync_input_plug < 0) { 155 *src = SND_BEBOB_CLOCK_TYPE_INTERNAL; 156 goto end; 157 } 158 159 /* 160 * 3.The device supports to switch source of clock by an usual way. 161 * Let's check input for 'Music Sub Unit Sync Input' plug. 162 */ 163 avc_bridgeco_fill_msu_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, 164 bebob->sync_input_plug); 165 err = avc_bridgeco_get_plug_input(bebob->unit, addr, input); 166 if (err < 0) { 167 dev_err(&bebob->unit->device, 168 "fail to get an input for MSU in plug %d: %d\n", 169 bebob->sync_input_plug, err); 170 goto end; 171 } 172 173 /* 174 * If there are no input plugs, all of fields are 0xff. 175 * Here check the first field. This field is used for direction. 176 */ 177 if (input[0] == 0xff) { 178 *src = SND_BEBOB_CLOCK_TYPE_INTERNAL; 179 goto end; 180 } 181 182 /* The source from any output plugs is for one purpose only. */ 183 if (input[0] == AVC_BRIDGECO_PLUG_DIR_OUT) { 184 /* 185 * In BeBoB architecture, the source from music subunit may 186 * bypass from oPCR[0]. This means that this source gives 187 * synchronization to IEEE 1394 cycle start packet. 188 */ 189 if (input[1] == AVC_BRIDGECO_PLUG_MODE_SUBUNIT && 190 input[2] == 0x0c) { 191 *src = SND_BEBOB_CLOCK_TYPE_INTERNAL; 192 goto end; 193 } 194 /* The source from any input units is for several purposes. */ 195 } else if (input[1] == AVC_BRIDGECO_PLUG_MODE_UNIT) { 196 if (input[2] == AVC_BRIDGECO_PLUG_UNIT_ISOC) { 197 if (input[3] == 0x00) { 198 /* 199 * This source comes from iPCR[0]. This means 200 * that presentation timestamp calculated by 201 * SYT series of the received packets. In 202 * short, this driver is the master of 203 * synchronization. 204 */ 205 *src = SND_BEBOB_CLOCK_TYPE_SYT; 206 goto end; 207 } else { 208 /* 209 * This source comes from iPCR[1-29]. This 210 * means that the synchronization stream is not 211 * the Audio/MIDI compound stream. 212 */ 213 *src = SND_BEBOB_CLOCK_TYPE_EXTERNAL; 214 goto end; 215 } 216 } else if (input[2] == AVC_BRIDGECO_PLUG_UNIT_EXT) { 217 /* Check type of this plug. */ 218 avc_bridgeco_fill_unit_addr(addr, 219 AVC_BRIDGECO_PLUG_DIR_IN, 220 AVC_BRIDGECO_PLUG_UNIT_EXT, 221 input[3]); 222 err = avc_bridgeco_get_plug_type(bebob->unit, addr, 223 &type); 224 if (err < 0) 225 goto end; 226 227 if (type == AVC_BRIDGECO_PLUG_TYPE_DIG) { 228 /* 229 * SPDIF/ADAT or sometimes (not always) word 230 * clock. 231 */ 232 *src = SND_BEBOB_CLOCK_TYPE_EXTERNAL; 233 goto end; 234 } else if (type == AVC_BRIDGECO_PLUG_TYPE_SYNC) { 235 /* Often word clock. */ 236 *src = SND_BEBOB_CLOCK_TYPE_EXTERNAL; 237 goto end; 238 } else if (type == AVC_BRIDGECO_PLUG_TYPE_ADDITION) { 239 /* 240 * Not standard. 241 * Mostly, additional internal clock. 242 */ 243 *src = SND_BEBOB_CLOCK_TYPE_INTERNAL; 244 goto end; 245 } 246 } 247 } 248 249 /* Not supported. */ 250 err = -EIO; 251 end: 252 return err; 253 } 254 255 static int map_data_channels(struct snd_bebob *bebob, struct amdtp_stream *s) 256 { 257 unsigned int sec, sections, ch, channels; 258 unsigned int pcm, midi, location; 259 unsigned int stm_pos, sec_loc, pos; 260 u8 *buf, addr[AVC_BRIDGECO_ADDR_BYTES], type; 261 enum avc_bridgeco_plug_dir dir; 262 int err; 263 264 /* 265 * The length of return value of this command cannot be expected. Here 266 * use the maximum length of FCP. 267 */ 268 buf = kzalloc(256, GFP_KERNEL); 269 if (buf == NULL) 270 return -ENOMEM; 271 272 if (s == &bebob->tx_stream) 273 dir = AVC_BRIDGECO_PLUG_DIR_OUT; 274 else 275 dir = AVC_BRIDGECO_PLUG_DIR_IN; 276 277 avc_bridgeco_fill_unit_addr(addr, dir, AVC_BRIDGECO_PLUG_UNIT_ISOC, 0); 278 err = avc_bridgeco_get_plug_ch_pos(bebob->unit, addr, buf, 256); 279 if (err < 0) { 280 dev_err(&bebob->unit->device, 281 "fail to get channel position for isoc %s plug 0: %d\n", 282 (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" : "out", 283 err); 284 goto end; 285 } 286 pos = 0; 287 288 /* positions in I/O buffer */ 289 pcm = 0; 290 midi = 0; 291 292 /* the number of sections in AMDTP packet */ 293 sections = buf[pos++]; 294 295 for (sec = 0; sec < sections; sec++) { 296 /* type of this section */ 297 avc_bridgeco_fill_unit_addr(addr, dir, 298 AVC_BRIDGECO_PLUG_UNIT_ISOC, 0); 299 err = avc_bridgeco_get_plug_section_type(bebob->unit, addr, 300 sec, &type); 301 if (err < 0) { 302 dev_err(&bebob->unit->device, 303 "fail to get section type for isoc %s plug 0: %d\n", 304 (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" : 305 "out", 306 err); 307 goto end; 308 } 309 /* NoType */ 310 if (type == 0xff) { 311 err = -ENOSYS; 312 goto end; 313 } 314 315 /* the number of channels in this section */ 316 channels = buf[pos++]; 317 318 for (ch = 0; ch < channels; ch++) { 319 /* position of this channel in AMDTP packet */ 320 stm_pos = buf[pos++] - 1; 321 /* location of this channel in this section */ 322 sec_loc = buf[pos++] - 1; 323 324 /* 325 * Basically the number of location is within the 326 * number of channels in this section. But some models 327 * of M-Audio don't follow this. Its location for MIDI 328 * is the position of MIDI channels in AMDTP packet. 329 */ 330 if (sec_loc >= channels) 331 sec_loc = ch; 332 333 switch (type) { 334 /* for MIDI conformant data channel */ 335 case 0x0a: 336 /* AMDTP_MAX_CHANNELS_FOR_MIDI is 1. */ 337 if ((midi > 0) && (stm_pos != midi)) { 338 err = -ENOSYS; 339 goto end; 340 } 341 amdtp_am824_set_midi_position(s, stm_pos); 342 midi = stm_pos; 343 break; 344 /* for PCM data channel */ 345 case 0x01: /* Headphone */ 346 case 0x02: /* Microphone */ 347 case 0x03: /* Line */ 348 case 0x04: /* SPDIF */ 349 case 0x05: /* ADAT */ 350 case 0x06: /* TDIF */ 351 case 0x07: /* MADI */ 352 /* for undefined/changeable signal */ 353 case 0x08: /* Analog */ 354 case 0x09: /* Digital */ 355 default: 356 location = pcm + sec_loc; 357 if (location >= AM824_MAX_CHANNELS_FOR_PCM) { 358 err = -ENOSYS; 359 goto end; 360 } 361 amdtp_am824_set_pcm_position(s, location, 362 stm_pos); 363 break; 364 } 365 } 366 367 if (type != 0x0a) 368 pcm += channels; 369 else 370 midi += channels; 371 } 372 end: 373 kfree(buf); 374 return err; 375 } 376 377 static int 378 check_connection_used_by_others(struct snd_bebob *bebob, struct amdtp_stream *s) 379 { 380 struct cmp_connection *conn; 381 bool used; 382 int err; 383 384 if (s == &bebob->tx_stream) 385 conn = &bebob->out_conn; 386 else 387 conn = &bebob->in_conn; 388 389 err = cmp_connection_check_used(conn, &used); 390 if ((err >= 0) && used && !amdtp_stream_running(s)) { 391 dev_err(&bebob->unit->device, 392 "Connection established by others: %cPCR[%d]\n", 393 (conn->direction == CMP_OUTPUT) ? 'o' : 'i', 394 conn->pcr_index); 395 err = -EBUSY; 396 } 397 398 return err; 399 } 400 401 static int make_both_connections(struct snd_bebob *bebob) 402 { 403 int err = 0; 404 405 err = cmp_connection_establish(&bebob->out_conn); 406 if (err < 0) 407 return err; 408 409 err = cmp_connection_establish(&bebob->in_conn); 410 if (err < 0) { 411 cmp_connection_break(&bebob->out_conn); 412 return err; 413 } 414 415 return 0; 416 } 417 418 static void 419 break_both_connections(struct snd_bebob *bebob) 420 { 421 cmp_connection_break(&bebob->in_conn); 422 cmp_connection_break(&bebob->out_conn); 423 424 /* These models seems to be in transition state for a longer time. */ 425 if (bebob->maudio_special_quirk != NULL) 426 msleep(200); 427 } 428 429 static int 430 start_stream(struct snd_bebob *bebob, struct amdtp_stream *stream) 431 { 432 struct cmp_connection *conn; 433 int err = 0; 434 435 if (stream == &bebob->rx_stream) 436 conn = &bebob->in_conn; 437 else 438 conn = &bebob->out_conn; 439 440 /* channel mapping */ 441 if (bebob->maudio_special_quirk == NULL) { 442 err = map_data_channels(bebob, stream); 443 if (err < 0) 444 goto end; 445 } 446 447 // start amdtp stream. 448 err = amdtp_domain_add_stream(&bebob->domain, stream, 449 conn->resources.channel, conn->speed); 450 end: 451 return err; 452 } 453 454 static int init_stream(struct snd_bebob *bebob, struct amdtp_stream *stream) 455 { 456 enum amdtp_stream_direction dir_stream; 457 struct cmp_connection *conn; 458 enum cmp_direction dir_conn; 459 int err; 460 461 if (stream == &bebob->tx_stream) { 462 dir_stream = AMDTP_IN_STREAM; 463 conn = &bebob->out_conn; 464 dir_conn = CMP_OUTPUT; 465 } else { 466 dir_stream = AMDTP_OUT_STREAM; 467 conn = &bebob->in_conn; 468 dir_conn = CMP_INPUT; 469 } 470 471 err = cmp_connection_init(conn, bebob->unit, dir_conn, 0); 472 if (err < 0) 473 return err; 474 475 err = amdtp_am824_init(stream, bebob->unit, dir_stream, CIP_BLOCKING); 476 if (err < 0) { 477 cmp_connection_destroy(conn); 478 return err; 479 } 480 481 if (stream == &bebob->tx_stream) { 482 // BeBoB v3 transfers packets with these qurks: 483 // - In the beginning of streaming, the value of dbc is 484 // incremented even if no data blocks are transferred. 485 // - The value of dbc is reset suddenly. 486 if (bebob->version > 2) 487 bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC | 488 CIP_SKIP_DBC_ZERO_CHECK; 489 490 // At high sampling rate, M-Audio special firmware transmits 491 // empty packet with the value of dbc incremented by 8 but the 492 // others are valid to IEC 61883-1. 493 if (bebob->maudio_special_quirk) 494 bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC; 495 } 496 497 return 0; 498 } 499 500 static void destroy_stream(struct snd_bebob *bebob, struct amdtp_stream *stream) 501 { 502 amdtp_stream_destroy(stream); 503 504 if (stream == &bebob->tx_stream) 505 cmp_connection_destroy(&bebob->out_conn); 506 else 507 cmp_connection_destroy(&bebob->in_conn); 508 } 509 510 int snd_bebob_stream_init_duplex(struct snd_bebob *bebob) 511 { 512 int err; 513 514 err = init_stream(bebob, &bebob->tx_stream); 515 if (err < 0) 516 return err; 517 518 err = init_stream(bebob, &bebob->rx_stream); 519 if (err < 0) { 520 destroy_stream(bebob, &bebob->tx_stream); 521 return err; 522 } 523 524 err = amdtp_domain_init(&bebob->domain); 525 if (err < 0) { 526 destroy_stream(bebob, &bebob->tx_stream); 527 destroy_stream(bebob, &bebob->rx_stream); 528 } 529 530 return err; 531 } 532 533 static int keep_resources(struct snd_bebob *bebob, struct amdtp_stream *stream, 534 unsigned int rate, unsigned int index) 535 { 536 struct snd_bebob_stream_formation *formation; 537 struct cmp_connection *conn; 538 int err; 539 540 if (stream == &bebob->tx_stream) { 541 formation = bebob->tx_stream_formations + index; 542 conn = &bebob->out_conn; 543 } else { 544 formation = bebob->rx_stream_formations + index; 545 conn = &bebob->in_conn; 546 } 547 548 err = amdtp_am824_set_parameters(stream, rate, formation->pcm, 549 formation->midi, false); 550 if (err < 0) 551 return err; 552 553 return cmp_connection_reserve(conn, amdtp_stream_get_max_payload(stream)); 554 } 555 556 int snd_bebob_stream_reserve_duplex(struct snd_bebob *bebob, unsigned int rate) 557 { 558 unsigned int curr_rate; 559 int err; 560 561 // Considering JACK/FFADO streaming: 562 // TODO: This can be removed hwdep functionality becomes popular. 563 err = check_connection_used_by_others(bebob, &bebob->rx_stream); 564 if (err < 0) 565 return err; 566 567 err = bebob->spec->rate->get(bebob, &curr_rate); 568 if (err < 0) 569 return err; 570 if (rate == 0) 571 rate = curr_rate; 572 if (curr_rate != rate) { 573 amdtp_domain_stop(&bebob->domain); 574 break_both_connections(bebob); 575 576 cmp_connection_release(&bebob->out_conn); 577 cmp_connection_release(&bebob->in_conn); 578 } 579 580 if (bebob->substreams_counter == 0 || curr_rate != rate) { 581 unsigned int index; 582 583 // NOTE: 584 // If establishing connections at first, Yamaha GO46 585 // (and maybe Terratec X24) don't generate sound. 586 // 587 // For firmware customized by M-Audio, refer to next NOTE. 588 err = bebob->spec->rate->set(bebob, rate); 589 if (err < 0) { 590 dev_err(&bebob->unit->device, 591 "fail to set sampling rate: %d\n", 592 err); 593 return err; 594 } 595 596 err = get_formation_index(rate, &index); 597 if (err < 0) 598 return err; 599 600 err = keep_resources(bebob, &bebob->tx_stream, rate, index); 601 if (err < 0) 602 return err; 603 604 err = keep_resources(bebob, &bebob->rx_stream, rate, index); 605 if (err < 0) { 606 cmp_connection_release(&bebob->out_conn); 607 return err; 608 } 609 } 610 611 return 0; 612 } 613 614 int snd_bebob_stream_start_duplex(struct snd_bebob *bebob) 615 { 616 int err; 617 618 // Need no substreams. 619 if (bebob->substreams_counter == 0) 620 return -EIO; 621 622 // packet queueing error or detecting discontinuity 623 if (amdtp_streaming_error(&bebob->rx_stream) || 624 amdtp_streaming_error(&bebob->tx_stream)) { 625 amdtp_domain_stop(&bebob->domain); 626 break_both_connections(bebob); 627 } 628 629 if (!amdtp_stream_running(&bebob->rx_stream)) { 630 unsigned int curr_rate; 631 632 if (bebob->maudio_special_quirk) { 633 err = bebob->spec->rate->get(bebob, &curr_rate); 634 if (err < 0) 635 return err; 636 } 637 638 err = make_both_connections(bebob); 639 if (err < 0) 640 return err; 641 642 err = start_stream(bebob, &bebob->rx_stream); 643 if (err < 0) 644 goto error; 645 646 err = start_stream(bebob, &bebob->tx_stream); 647 if (err < 0) 648 goto error; 649 650 err = amdtp_domain_start(&bebob->domain); 651 if (err < 0) 652 goto error; 653 654 // NOTE: 655 // The firmware customized by M-Audio uses these commands to 656 // start transmitting stream. This is not usual way. 657 if (bebob->maudio_special_quirk) { 658 err = bebob->spec->rate->set(bebob, curr_rate); 659 if (err < 0) { 660 dev_err(&bebob->unit->device, 661 "fail to ensure sampling rate: %d\n", 662 err); 663 goto error; 664 } 665 } 666 667 if (!amdtp_stream_wait_callback(&bebob->rx_stream, 668 CALLBACK_TIMEOUT) || 669 !amdtp_stream_wait_callback(&bebob->tx_stream, 670 CALLBACK_TIMEOUT)) { 671 err = -ETIMEDOUT; 672 goto error; 673 } 674 } 675 676 return 0; 677 error: 678 amdtp_domain_stop(&bebob->domain); 679 break_both_connections(bebob); 680 return err; 681 } 682 683 void snd_bebob_stream_stop_duplex(struct snd_bebob *bebob) 684 { 685 if (bebob->substreams_counter == 0) { 686 amdtp_domain_stop(&bebob->domain); 687 break_both_connections(bebob); 688 689 cmp_connection_release(&bebob->out_conn); 690 cmp_connection_release(&bebob->in_conn); 691 } 692 } 693 694 /* 695 * This function should be called before starting streams or after stopping 696 * streams. 697 */ 698 void snd_bebob_stream_destroy_duplex(struct snd_bebob *bebob) 699 { 700 amdtp_domain_destroy(&bebob->domain); 701 702 destroy_stream(bebob, &bebob->tx_stream); 703 destroy_stream(bebob, &bebob->rx_stream); 704 } 705 706 /* 707 * See: Table 50: Extended Stream Format Info Format Hierarchy Level 2’ 708 * in Additional AVC commands (Nov 2003, BridgeCo) 709 * Also 'Clause 12 AM824 sequence adaption layers' in IEC 61883-6:2005 710 */ 711 static int 712 parse_stream_formation(u8 *buf, unsigned int len, 713 struct snd_bebob_stream_formation *formation) 714 { 715 unsigned int i, e, channels, format; 716 717 /* 718 * this module can support a hierarchy combination that: 719 * Root: Audio and Music (0x90) 720 * Level 1: AM824 Compound (0x40) 721 */ 722 if ((buf[0] != 0x90) || (buf[1] != 0x40)) 723 return -ENOSYS; 724 725 /* check sampling rate */ 726 for (i = 0; i < ARRAY_SIZE(bridgeco_freq_table); i++) { 727 if (buf[2] == bridgeco_freq_table[i]) 728 break; 729 } 730 if (i == ARRAY_SIZE(bridgeco_freq_table)) 731 return -ENOSYS; 732 733 /* Avoid double count by different entries for the same rate. */ 734 memset(&formation[i], 0, sizeof(struct snd_bebob_stream_formation)); 735 736 for (e = 0; e < buf[4]; e++) { 737 channels = buf[5 + e * 2]; 738 format = buf[6 + e * 2]; 739 740 switch (format) { 741 /* IEC 60958 Conformant, currently handled as MBLA */ 742 case 0x00: 743 /* Multi bit linear audio */ 744 case 0x06: /* Raw */ 745 formation[i].pcm += channels; 746 break; 747 /* MIDI Conformant */ 748 case 0x0d: 749 formation[i].midi += channels; 750 break; 751 /* IEC 61937-3 to 7 */ 752 case 0x01: 753 case 0x02: 754 case 0x03: 755 case 0x04: 756 case 0x05: 757 /* Multi bit linear audio */ 758 case 0x07: /* DVD-Audio */ 759 case 0x0c: /* High Precision */ 760 /* One Bit Audio */ 761 case 0x08: /* (Plain) Raw */ 762 case 0x09: /* (Plain) SACD */ 763 case 0x0a: /* (Encoded) Raw */ 764 case 0x0b: /* (Encoded) SACD */ 765 /* Synchronization Stream (Stereo Raw audio) */ 766 case 0x40: 767 /* Don't care */ 768 case 0xff: 769 default: 770 return -ENOSYS; /* not supported */ 771 } 772 } 773 774 if (formation[i].pcm > AM824_MAX_CHANNELS_FOR_PCM || 775 formation[i].midi > AM824_MAX_CHANNELS_FOR_MIDI) 776 return -ENOSYS; 777 778 return 0; 779 } 780 781 static int 782 fill_stream_formations(struct snd_bebob *bebob, enum avc_bridgeco_plug_dir dir, 783 unsigned short pid) 784 { 785 u8 *buf; 786 struct snd_bebob_stream_formation *formations; 787 unsigned int len, eid; 788 u8 addr[AVC_BRIDGECO_ADDR_BYTES]; 789 int err; 790 791 buf = kmalloc(FORMAT_MAXIMUM_LENGTH, GFP_KERNEL); 792 if (buf == NULL) 793 return -ENOMEM; 794 795 if (dir == AVC_BRIDGECO_PLUG_DIR_IN) 796 formations = bebob->rx_stream_formations; 797 else 798 formations = bebob->tx_stream_formations; 799 800 for (eid = 0; eid < SND_BEBOB_STRM_FMT_ENTRIES; eid++) { 801 len = FORMAT_MAXIMUM_LENGTH; 802 avc_bridgeco_fill_unit_addr(addr, dir, 803 AVC_BRIDGECO_PLUG_UNIT_ISOC, pid); 804 err = avc_bridgeco_get_plug_strm_fmt(bebob->unit, addr, buf, 805 &len, eid); 806 /* No entries remained. */ 807 if (err == -EINVAL && eid > 0) { 808 err = 0; 809 break; 810 } else if (err < 0) { 811 dev_err(&bebob->unit->device, 812 "fail to get stream format %d for isoc %s plug %d:%d\n", 813 eid, 814 (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" : 815 "out", 816 pid, err); 817 break; 818 } 819 820 err = parse_stream_formation(buf, len, formations); 821 if (err < 0) 822 break; 823 } 824 825 kfree(buf); 826 return err; 827 } 828 829 static int 830 seek_msu_sync_input_plug(struct snd_bebob *bebob) 831 { 832 u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES]; 833 unsigned int i; 834 enum avc_bridgeco_plug_type type; 835 int err; 836 837 /* Get the number of Music Sub Unit for both direction. */ 838 err = avc_general_get_plug_info(bebob->unit, 0x0c, 0x00, 0x00, plugs); 839 if (err < 0) { 840 dev_err(&bebob->unit->device, 841 "fail to get info for MSU in/out plugs: %d\n", 842 err); 843 goto end; 844 } 845 846 /* seek destination plugs for 'MSU sync input' */ 847 bebob->sync_input_plug = -1; 848 for (i = 0; i < plugs[0]; i++) { 849 avc_bridgeco_fill_msu_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, i); 850 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 851 if (err < 0) { 852 dev_err(&bebob->unit->device, 853 "fail to get type for MSU in plug %d: %d\n", 854 i, err); 855 goto end; 856 } 857 858 if (type == AVC_BRIDGECO_PLUG_TYPE_SYNC) { 859 bebob->sync_input_plug = i; 860 break; 861 } 862 } 863 end: 864 return err; 865 } 866 867 int snd_bebob_stream_discover(struct snd_bebob *bebob) 868 { 869 const struct snd_bebob_clock_spec *clk_spec = bebob->spec->clock; 870 u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES]; 871 enum avc_bridgeco_plug_type type; 872 unsigned int i; 873 int err; 874 875 /* the number of plugs for isoc in/out, ext in/out */ 876 err = avc_general_get_plug_info(bebob->unit, 0x1f, 0x07, 0x00, plugs); 877 if (err < 0) { 878 dev_err(&bebob->unit->device, 879 "fail to get info for isoc/external in/out plugs: %d\n", 880 err); 881 goto end; 882 } 883 884 /* 885 * This module supports at least one isoc input plug and one isoc 886 * output plug. 887 */ 888 if ((plugs[0] == 0) || (plugs[1] == 0)) { 889 err = -ENOSYS; 890 goto end; 891 } 892 893 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, 894 AVC_BRIDGECO_PLUG_UNIT_ISOC, 0); 895 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 896 if (err < 0) { 897 dev_err(&bebob->unit->device, 898 "fail to get type for isoc in plug 0: %d\n", err); 899 goto end; 900 } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) { 901 err = -ENOSYS; 902 goto end; 903 } 904 err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_IN, 0); 905 if (err < 0) 906 goto end; 907 908 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT, 909 AVC_BRIDGECO_PLUG_UNIT_ISOC, 0); 910 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 911 if (err < 0) { 912 dev_err(&bebob->unit->device, 913 "fail to get type for isoc out plug 0: %d\n", err); 914 goto end; 915 } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) { 916 err = -ENOSYS; 917 goto end; 918 } 919 err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_OUT, 0); 920 if (err < 0) 921 goto end; 922 923 /* count external input plugs for MIDI */ 924 bebob->midi_input_ports = 0; 925 for (i = 0; i < plugs[2]; i++) { 926 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, 927 AVC_BRIDGECO_PLUG_UNIT_EXT, i); 928 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 929 if (err < 0) { 930 dev_err(&bebob->unit->device, 931 "fail to get type for external in plug %d: %d\n", 932 i, err); 933 goto end; 934 } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) { 935 bebob->midi_input_ports++; 936 } 937 } 938 939 /* count external output plugs for MIDI */ 940 bebob->midi_output_ports = 0; 941 for (i = 0; i < plugs[3]; i++) { 942 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT, 943 AVC_BRIDGECO_PLUG_UNIT_EXT, i); 944 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 945 if (err < 0) { 946 dev_err(&bebob->unit->device, 947 "fail to get type for external out plug %d: %d\n", 948 i, err); 949 goto end; 950 } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) { 951 bebob->midi_output_ports++; 952 } 953 } 954 955 /* for check source of clock later */ 956 if (!clk_spec) 957 err = seek_msu_sync_input_plug(bebob); 958 end: 959 return err; 960 } 961 962 void snd_bebob_stream_lock_changed(struct snd_bebob *bebob) 963 { 964 bebob->dev_lock_changed = true; 965 wake_up(&bebob->hwdep_wait); 966 } 967 968 int snd_bebob_stream_lock_try(struct snd_bebob *bebob) 969 { 970 int err; 971 972 spin_lock_irq(&bebob->lock); 973 974 /* user land lock this */ 975 if (bebob->dev_lock_count < 0) { 976 err = -EBUSY; 977 goto end; 978 } 979 980 /* this is the first time */ 981 if (bebob->dev_lock_count++ == 0) 982 snd_bebob_stream_lock_changed(bebob); 983 err = 0; 984 end: 985 spin_unlock_irq(&bebob->lock); 986 return err; 987 } 988 989 void snd_bebob_stream_lock_release(struct snd_bebob *bebob) 990 { 991 spin_lock_irq(&bebob->lock); 992 993 if (WARN_ON(bebob->dev_lock_count <= 0)) 994 goto end; 995 if (--bebob->dev_lock_count == 0) 996 snd_bebob_stream_lock_changed(bebob); 997 end: 998 spin_unlock_irq(&bebob->lock); 999 } 1000