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 unsigned int 256 map_data_channels(struct snd_bebob *bebob, struct amdtp_stream *s) 257 { 258 unsigned int sec, sections, ch, channels; 259 unsigned int pcm, midi, location; 260 unsigned int stm_pos, sec_loc, pos; 261 u8 *buf, addr[AVC_BRIDGECO_ADDR_BYTES], type; 262 enum avc_bridgeco_plug_dir dir; 263 int err; 264 265 /* 266 * The length of return value of this command cannot be expected. Here 267 * use the maximum length of FCP. 268 */ 269 buf = kzalloc(256, GFP_KERNEL); 270 if (buf == NULL) 271 return -ENOMEM; 272 273 if (s == &bebob->tx_stream) 274 dir = AVC_BRIDGECO_PLUG_DIR_OUT; 275 else 276 dir = AVC_BRIDGECO_PLUG_DIR_IN; 277 278 avc_bridgeco_fill_unit_addr(addr, dir, AVC_BRIDGECO_PLUG_UNIT_ISOC, 0); 279 err = avc_bridgeco_get_plug_ch_pos(bebob->unit, addr, buf, 256); 280 if (err < 0) { 281 dev_err(&bebob->unit->device, 282 "fail to get channel position for isoc %s plug 0: %d\n", 283 (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" : "out", 284 err); 285 goto end; 286 } 287 pos = 0; 288 289 /* positions in I/O buffer */ 290 pcm = 0; 291 midi = 0; 292 293 /* the number of sections in AMDTP packet */ 294 sections = buf[pos++]; 295 296 for (sec = 0; sec < sections; sec++) { 297 /* type of this section */ 298 avc_bridgeco_fill_unit_addr(addr, dir, 299 AVC_BRIDGECO_PLUG_UNIT_ISOC, 0); 300 err = avc_bridgeco_get_plug_section_type(bebob->unit, addr, 301 sec, &type); 302 if (err < 0) { 303 dev_err(&bebob->unit->device, 304 "fail to get section type for isoc %s plug 0: %d\n", 305 (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" : 306 "out", 307 err); 308 goto end; 309 } 310 /* NoType */ 311 if (type == 0xff) { 312 err = -ENOSYS; 313 goto end; 314 } 315 316 /* the number of channels in this section */ 317 channels = buf[pos++]; 318 319 for (ch = 0; ch < channels; ch++) { 320 /* position of this channel in AMDTP packet */ 321 stm_pos = buf[pos++] - 1; 322 /* location of this channel in this section */ 323 sec_loc = buf[pos++] - 1; 324 325 /* 326 * Basically the number of location is within the 327 * number of channels in this section. But some models 328 * of M-Audio don't follow this. Its location for MIDI 329 * is the position of MIDI channels in AMDTP packet. 330 */ 331 if (sec_loc >= channels) 332 sec_loc = ch; 333 334 switch (type) { 335 /* for MIDI conformant data channel */ 336 case 0x0a: 337 /* AMDTP_MAX_CHANNELS_FOR_MIDI is 1. */ 338 if ((midi > 0) && (stm_pos != midi)) { 339 err = -ENOSYS; 340 goto end; 341 } 342 amdtp_am824_set_midi_position(s, stm_pos); 343 midi = stm_pos; 344 break; 345 /* for PCM data channel */ 346 case 0x01: /* Headphone */ 347 case 0x02: /* Microphone */ 348 case 0x03: /* Line */ 349 case 0x04: /* SPDIF */ 350 case 0x05: /* ADAT */ 351 case 0x06: /* TDIF */ 352 case 0x07: /* MADI */ 353 /* for undefined/changeable signal */ 354 case 0x08: /* Analog */ 355 case 0x09: /* Digital */ 356 default: 357 location = pcm + sec_loc; 358 if (location >= AM824_MAX_CHANNELS_FOR_PCM) { 359 err = -ENOSYS; 360 goto end; 361 } 362 amdtp_am824_set_pcm_position(s, location, 363 stm_pos); 364 break; 365 } 366 } 367 368 if (type != 0x0a) 369 pcm += channels; 370 else 371 midi += channels; 372 } 373 end: 374 kfree(buf); 375 return err; 376 } 377 378 static int 379 check_connection_used_by_others(struct snd_bebob *bebob, struct amdtp_stream *s) 380 { 381 struct cmp_connection *conn; 382 bool used; 383 int err; 384 385 if (s == &bebob->tx_stream) 386 conn = &bebob->out_conn; 387 else 388 conn = &bebob->in_conn; 389 390 err = cmp_connection_check_used(conn, &used); 391 if ((err >= 0) && used && !amdtp_stream_running(s)) { 392 dev_err(&bebob->unit->device, 393 "Connection established by others: %cPCR[%d]\n", 394 (conn->direction == CMP_OUTPUT) ? 'o' : 'i', 395 conn->pcr_index); 396 err = -EBUSY; 397 } 398 399 return err; 400 } 401 402 static int make_both_connections(struct snd_bebob *bebob) 403 { 404 int err = 0; 405 406 err = cmp_connection_establish(&bebob->out_conn); 407 if (err < 0) 408 return err; 409 410 err = cmp_connection_establish(&bebob->in_conn); 411 if (err < 0) { 412 cmp_connection_break(&bebob->out_conn); 413 return err; 414 } 415 416 return 0; 417 } 418 419 static void 420 break_both_connections(struct snd_bebob *bebob) 421 { 422 cmp_connection_break(&bebob->in_conn); 423 cmp_connection_break(&bebob->out_conn); 424 425 /* These models seems to be in transition state for a longer time. */ 426 if (bebob->maudio_special_quirk != NULL) 427 msleep(200); 428 } 429 430 static int 431 start_stream(struct snd_bebob *bebob, struct amdtp_stream *stream) 432 { 433 struct cmp_connection *conn; 434 int err = 0; 435 436 if (stream == &bebob->rx_stream) 437 conn = &bebob->in_conn; 438 else 439 conn = &bebob->out_conn; 440 441 /* channel mapping */ 442 if (bebob->maudio_special_quirk == NULL) { 443 err = map_data_channels(bebob, stream); 444 if (err < 0) 445 goto end; 446 } 447 448 // start amdtp stream. 449 err = amdtp_domain_add_stream(&bebob->domain, stream, 450 conn->resources.channel, conn->speed); 451 end: 452 return err; 453 } 454 455 static int init_stream(struct snd_bebob *bebob, struct amdtp_stream *stream) 456 { 457 enum amdtp_stream_direction dir_stream; 458 struct cmp_connection *conn; 459 enum cmp_direction dir_conn; 460 int err; 461 462 if (stream == &bebob->tx_stream) { 463 dir_stream = AMDTP_IN_STREAM; 464 conn = &bebob->out_conn; 465 dir_conn = CMP_OUTPUT; 466 } else { 467 dir_stream = AMDTP_OUT_STREAM; 468 conn = &bebob->in_conn; 469 dir_conn = CMP_INPUT; 470 } 471 472 err = cmp_connection_init(conn, bebob->unit, dir_conn, 0); 473 if (err < 0) 474 return err; 475 476 err = amdtp_am824_init(stream, bebob->unit, dir_stream, CIP_BLOCKING); 477 if (err < 0) { 478 cmp_connection_destroy(conn); 479 return err; 480 } 481 482 if (stream == &bebob->tx_stream) { 483 // BeBoB v3 transfers packets with these qurks: 484 // - In the beginning of streaming, the value of dbc is 485 // incremented even if no data blocks are transferred. 486 // - The value of dbc is reset suddenly. 487 if (bebob->version > 2) 488 bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC | 489 CIP_SKIP_DBC_ZERO_CHECK; 490 491 // At high sampling rate, M-Audio special firmware transmits 492 // empty packet with the value of dbc incremented by 8 but the 493 // others are valid to IEC 61883-1. 494 if (bebob->maudio_special_quirk) 495 bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC; 496 } 497 498 return 0; 499 } 500 501 static void destroy_stream(struct snd_bebob *bebob, struct amdtp_stream *stream) 502 { 503 amdtp_stream_destroy(stream); 504 505 if (stream == &bebob->tx_stream) 506 cmp_connection_destroy(&bebob->out_conn); 507 else 508 cmp_connection_destroy(&bebob->in_conn); 509 } 510 511 int snd_bebob_stream_init_duplex(struct snd_bebob *bebob) 512 { 513 int err; 514 515 err = init_stream(bebob, &bebob->tx_stream); 516 if (err < 0) 517 return err; 518 519 err = init_stream(bebob, &bebob->rx_stream); 520 if (err < 0) { 521 destroy_stream(bebob, &bebob->tx_stream); 522 return err; 523 } 524 525 err = amdtp_domain_init(&bebob->domain); 526 if (err < 0) { 527 destroy_stream(bebob, &bebob->tx_stream); 528 destroy_stream(bebob, &bebob->rx_stream); 529 } 530 531 return err; 532 } 533 534 static int keep_resources(struct snd_bebob *bebob, struct amdtp_stream *stream, 535 unsigned int rate, unsigned int index) 536 { 537 struct snd_bebob_stream_formation *formation; 538 struct cmp_connection *conn; 539 int err; 540 541 if (stream == &bebob->tx_stream) { 542 formation = bebob->tx_stream_formations + index; 543 conn = &bebob->out_conn; 544 } else { 545 formation = bebob->rx_stream_formations + index; 546 conn = &bebob->in_conn; 547 } 548 549 err = amdtp_am824_set_parameters(stream, rate, formation->pcm, 550 formation->midi, false); 551 if (err < 0) 552 return err; 553 554 return cmp_connection_reserve(conn, amdtp_stream_get_max_payload(stream)); 555 } 556 557 int snd_bebob_stream_reserve_duplex(struct snd_bebob *bebob, unsigned int rate) 558 { 559 unsigned int curr_rate; 560 int err; 561 562 // Considering JACK/FFADO streaming: 563 // TODO: This can be removed hwdep functionality becomes popular. 564 err = check_connection_used_by_others(bebob, &bebob->rx_stream); 565 if (err < 0) 566 return err; 567 568 err = bebob->spec->rate->get(bebob, &curr_rate); 569 if (err < 0) 570 return err; 571 if (rate == 0) 572 rate = curr_rate; 573 if (curr_rate != rate) { 574 amdtp_domain_stop(&bebob->domain); 575 break_both_connections(bebob); 576 577 cmp_connection_release(&bebob->out_conn); 578 cmp_connection_release(&bebob->in_conn); 579 } 580 581 if (bebob->substreams_counter == 0 || curr_rate != rate) { 582 unsigned int index; 583 584 // NOTE: 585 // If establishing connections at first, Yamaha GO46 586 // (and maybe Terratec X24) don't generate sound. 587 // 588 // For firmware customized by M-Audio, refer to next NOTE. 589 err = bebob->spec->rate->set(bebob, rate); 590 if (err < 0) { 591 dev_err(&bebob->unit->device, 592 "fail to set sampling rate: %d\n", 593 err); 594 return err; 595 } 596 597 err = get_formation_index(rate, &index); 598 if (err < 0) 599 return err; 600 601 err = keep_resources(bebob, &bebob->tx_stream, rate, index); 602 if (err < 0) 603 return err; 604 605 err = keep_resources(bebob, &bebob->rx_stream, rate, index); 606 if (err < 0) { 607 cmp_connection_release(&bebob->out_conn); 608 return err; 609 } 610 } 611 612 return 0; 613 } 614 615 int snd_bebob_stream_start_duplex(struct snd_bebob *bebob) 616 { 617 int err; 618 619 // Need no substreams. 620 if (bebob->substreams_counter == 0) 621 return -EIO; 622 623 // packet queueing error or detecting discontinuity 624 if (amdtp_streaming_error(&bebob->rx_stream) || 625 amdtp_streaming_error(&bebob->tx_stream)) { 626 amdtp_domain_stop(&bebob->domain); 627 break_both_connections(bebob); 628 } 629 630 if (!amdtp_stream_running(&bebob->rx_stream)) { 631 unsigned int curr_rate; 632 633 if (bebob->maudio_special_quirk) { 634 err = bebob->spec->rate->get(bebob, &curr_rate); 635 if (err < 0) 636 return err; 637 } 638 639 err = make_both_connections(bebob); 640 if (err < 0) 641 return err; 642 643 err = start_stream(bebob, &bebob->rx_stream); 644 if (err < 0) 645 goto error; 646 647 err = start_stream(bebob, &bebob->tx_stream); 648 if (err < 0) 649 goto error; 650 651 err = amdtp_domain_start(&bebob->domain); 652 if (err < 0) 653 goto error; 654 655 // NOTE: 656 // The firmware customized by M-Audio uses these commands to 657 // start transmitting stream. This is not usual way. 658 if (bebob->maudio_special_quirk) { 659 err = bebob->spec->rate->set(bebob, curr_rate); 660 if (err < 0) { 661 dev_err(&bebob->unit->device, 662 "fail to ensure sampling rate: %d\n", 663 err); 664 goto error; 665 } 666 } 667 668 if (!amdtp_stream_wait_callback(&bebob->rx_stream, 669 CALLBACK_TIMEOUT) || 670 !amdtp_stream_wait_callback(&bebob->tx_stream, 671 CALLBACK_TIMEOUT)) { 672 err = -ETIMEDOUT; 673 goto error; 674 } 675 } 676 677 return 0; 678 error: 679 amdtp_domain_stop(&bebob->domain); 680 break_both_connections(bebob); 681 return err; 682 } 683 684 void snd_bebob_stream_stop_duplex(struct snd_bebob *bebob) 685 { 686 if (bebob->substreams_counter == 0) { 687 amdtp_domain_stop(&bebob->domain); 688 break_both_connections(bebob); 689 690 cmp_connection_release(&bebob->out_conn); 691 cmp_connection_release(&bebob->in_conn); 692 } 693 } 694 695 /* 696 * This function should be called before starting streams or after stopping 697 * streams. 698 */ 699 void snd_bebob_stream_destroy_duplex(struct snd_bebob *bebob) 700 { 701 amdtp_domain_destroy(&bebob->domain); 702 703 destroy_stream(bebob, &bebob->tx_stream); 704 destroy_stream(bebob, &bebob->rx_stream); 705 } 706 707 /* 708 * See: Table 50: Extended Stream Format Info Format Hierarchy Level 2’ 709 * in Additional AVC commands (Nov 2003, BridgeCo) 710 * Also 'Clause 12 AM824 sequence adaption layers' in IEC 61883-6:2005 711 */ 712 static int 713 parse_stream_formation(u8 *buf, unsigned int len, 714 struct snd_bebob_stream_formation *formation) 715 { 716 unsigned int i, e, channels, format; 717 718 /* 719 * this module can support a hierarchy combination that: 720 * Root: Audio and Music (0x90) 721 * Level 1: AM824 Compound (0x40) 722 */ 723 if ((buf[0] != 0x90) || (buf[1] != 0x40)) 724 return -ENOSYS; 725 726 /* check sampling rate */ 727 for (i = 0; i < ARRAY_SIZE(bridgeco_freq_table); i++) { 728 if (buf[2] == bridgeco_freq_table[i]) 729 break; 730 } 731 if (i == ARRAY_SIZE(bridgeco_freq_table)) 732 return -ENOSYS; 733 734 /* Avoid double count by different entries for the same rate. */ 735 memset(&formation[i], 0, sizeof(struct snd_bebob_stream_formation)); 736 737 for (e = 0; e < buf[4]; e++) { 738 channels = buf[5 + e * 2]; 739 format = buf[6 + e * 2]; 740 741 switch (format) { 742 /* IEC 60958 Conformant, currently handled as MBLA */ 743 case 0x00: 744 /* Multi bit linear audio */ 745 case 0x06: /* Raw */ 746 formation[i].pcm += channels; 747 break; 748 /* MIDI Conformant */ 749 case 0x0d: 750 formation[i].midi += channels; 751 break; 752 /* IEC 61937-3 to 7 */ 753 case 0x01: 754 case 0x02: 755 case 0x03: 756 case 0x04: 757 case 0x05: 758 /* Multi bit linear audio */ 759 case 0x07: /* DVD-Audio */ 760 case 0x0c: /* High Precision */ 761 /* One Bit Audio */ 762 case 0x08: /* (Plain) Raw */ 763 case 0x09: /* (Plain) SACD */ 764 case 0x0a: /* (Encoded) Raw */ 765 case 0x0b: /* (Encoded) SACD */ 766 /* Synchronization Stream (Stereo Raw audio) */ 767 case 0x40: 768 /* Don't care */ 769 case 0xff: 770 default: 771 return -ENOSYS; /* not supported */ 772 } 773 } 774 775 if (formation[i].pcm > AM824_MAX_CHANNELS_FOR_PCM || 776 formation[i].midi > AM824_MAX_CHANNELS_FOR_MIDI) 777 return -ENOSYS; 778 779 return 0; 780 } 781 782 static int 783 fill_stream_formations(struct snd_bebob *bebob, enum avc_bridgeco_plug_dir dir, 784 unsigned short pid) 785 { 786 u8 *buf; 787 struct snd_bebob_stream_formation *formations; 788 unsigned int len, eid; 789 u8 addr[AVC_BRIDGECO_ADDR_BYTES]; 790 int err; 791 792 buf = kmalloc(FORMAT_MAXIMUM_LENGTH, GFP_KERNEL); 793 if (buf == NULL) 794 return -ENOMEM; 795 796 if (dir == AVC_BRIDGECO_PLUG_DIR_IN) 797 formations = bebob->rx_stream_formations; 798 else 799 formations = bebob->tx_stream_formations; 800 801 for (eid = 0; eid < SND_BEBOB_STRM_FMT_ENTRIES; eid++) { 802 len = FORMAT_MAXIMUM_LENGTH; 803 avc_bridgeco_fill_unit_addr(addr, dir, 804 AVC_BRIDGECO_PLUG_UNIT_ISOC, pid); 805 err = avc_bridgeco_get_plug_strm_fmt(bebob->unit, addr, buf, 806 &len, eid); 807 /* No entries remained. */ 808 if (err == -EINVAL && eid > 0) { 809 err = 0; 810 break; 811 } else if (err < 0) { 812 dev_err(&bebob->unit->device, 813 "fail to get stream format %d for isoc %s plug %d:%d\n", 814 eid, 815 (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" : 816 "out", 817 pid, err); 818 break; 819 } 820 821 err = parse_stream_formation(buf, len, formations); 822 if (err < 0) 823 break; 824 } 825 826 kfree(buf); 827 return err; 828 } 829 830 static int 831 seek_msu_sync_input_plug(struct snd_bebob *bebob) 832 { 833 u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES]; 834 unsigned int i; 835 enum avc_bridgeco_plug_type type; 836 int err; 837 838 /* Get the number of Music Sub Unit for both direction. */ 839 err = avc_general_get_plug_info(bebob->unit, 0x0c, 0x00, 0x00, plugs); 840 if (err < 0) { 841 dev_err(&bebob->unit->device, 842 "fail to get info for MSU in/out plugs: %d\n", 843 err); 844 goto end; 845 } 846 847 /* seek destination plugs for 'MSU sync input' */ 848 bebob->sync_input_plug = -1; 849 for (i = 0; i < plugs[0]; i++) { 850 avc_bridgeco_fill_msu_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, i); 851 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 852 if (err < 0) { 853 dev_err(&bebob->unit->device, 854 "fail to get type for MSU in plug %d: %d\n", 855 i, err); 856 goto end; 857 } 858 859 if (type == AVC_BRIDGECO_PLUG_TYPE_SYNC) { 860 bebob->sync_input_plug = i; 861 break; 862 } 863 } 864 end: 865 return err; 866 } 867 868 int snd_bebob_stream_discover(struct snd_bebob *bebob) 869 { 870 const struct snd_bebob_clock_spec *clk_spec = bebob->spec->clock; 871 u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES]; 872 enum avc_bridgeco_plug_type type; 873 unsigned int i; 874 int err; 875 876 /* the number of plugs for isoc in/out, ext in/out */ 877 err = avc_general_get_plug_info(bebob->unit, 0x1f, 0x07, 0x00, plugs); 878 if (err < 0) { 879 dev_err(&bebob->unit->device, 880 "fail to get info for isoc/external in/out plugs: %d\n", 881 err); 882 goto end; 883 } 884 885 /* 886 * This module supports at least one isoc input plug and one isoc 887 * output plug. 888 */ 889 if ((plugs[0] == 0) || (plugs[1] == 0)) { 890 err = -ENOSYS; 891 goto end; 892 } 893 894 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, 895 AVC_BRIDGECO_PLUG_UNIT_ISOC, 0); 896 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 897 if (err < 0) { 898 dev_err(&bebob->unit->device, 899 "fail to get type for isoc in plug 0: %d\n", err); 900 goto end; 901 } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) { 902 err = -ENOSYS; 903 goto end; 904 } 905 err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_IN, 0); 906 if (err < 0) 907 goto end; 908 909 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT, 910 AVC_BRIDGECO_PLUG_UNIT_ISOC, 0); 911 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 912 if (err < 0) { 913 dev_err(&bebob->unit->device, 914 "fail to get type for isoc out plug 0: %d\n", err); 915 goto end; 916 } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) { 917 err = -ENOSYS; 918 goto end; 919 } 920 err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_OUT, 0); 921 if (err < 0) 922 goto end; 923 924 /* count external input plugs for MIDI */ 925 bebob->midi_input_ports = 0; 926 for (i = 0; i < plugs[2]; i++) { 927 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, 928 AVC_BRIDGECO_PLUG_UNIT_EXT, i); 929 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 930 if (err < 0) { 931 dev_err(&bebob->unit->device, 932 "fail to get type for external in plug %d: %d\n", 933 i, err); 934 goto end; 935 } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) { 936 bebob->midi_input_ports++; 937 } 938 } 939 940 /* count external output plugs for MIDI */ 941 bebob->midi_output_ports = 0; 942 for (i = 0; i < plugs[3]; i++) { 943 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT, 944 AVC_BRIDGECO_PLUG_UNIT_EXT, i); 945 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 946 if (err < 0) { 947 dev_err(&bebob->unit->device, 948 "fail to get type for external out plug %d: %d\n", 949 i, err); 950 goto end; 951 } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) { 952 bebob->midi_output_ports++; 953 } 954 } 955 956 /* for check source of clock later */ 957 if (!clk_spec) 958 err = seek_msu_sync_input_plug(bebob); 959 end: 960 return err; 961 } 962 963 void snd_bebob_stream_lock_changed(struct snd_bebob *bebob) 964 { 965 bebob->dev_lock_changed = true; 966 wake_up(&bebob->hwdep_wait); 967 } 968 969 int snd_bebob_stream_lock_try(struct snd_bebob *bebob) 970 { 971 int err; 972 973 spin_lock_irq(&bebob->lock); 974 975 /* user land lock this */ 976 if (bebob->dev_lock_count < 0) { 977 err = -EBUSY; 978 goto end; 979 } 980 981 /* this is the first time */ 982 if (bebob->dev_lock_count++ == 0) 983 snd_bebob_stream_lock_changed(bebob); 984 err = 0; 985 end: 986 spin_unlock_irq(&bebob->lock); 987 return err; 988 } 989 990 void snd_bebob_stream_lock_release(struct snd_bebob *bebob) 991 { 992 spin_lock_irq(&bebob->lock); 993 994 if (WARN_ON(bebob->dev_lock_count <= 0)) 995 goto end; 996 if (--bebob->dev_lock_count == 0) 997 snd_bebob_stream_lock_changed(bebob); 998 end: 999 spin_unlock_irq(&bebob->lock); 1000 } 1001