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_stream_start(stream, 450 conn->resources.channel, 451 conn->speed); 452 end: 453 return err; 454 } 455 456 static int init_stream(struct snd_bebob *bebob, struct amdtp_stream *stream) 457 { 458 enum amdtp_stream_direction dir_stream; 459 struct cmp_connection *conn; 460 enum cmp_direction dir_conn; 461 int err; 462 463 if (stream == &bebob->tx_stream) { 464 dir_stream = AMDTP_IN_STREAM; 465 conn = &bebob->out_conn; 466 dir_conn = CMP_OUTPUT; 467 } else { 468 dir_stream = AMDTP_OUT_STREAM; 469 conn = &bebob->in_conn; 470 dir_conn = CMP_INPUT; 471 } 472 473 err = cmp_connection_init(conn, bebob->unit, dir_conn, 0); 474 if (err < 0) 475 return err; 476 477 err = amdtp_am824_init(stream, bebob->unit, dir_stream, CIP_BLOCKING); 478 if (err < 0) { 479 cmp_connection_destroy(conn); 480 return err; 481 } 482 483 if (stream == &bebob->tx_stream) { 484 // BeBoB v3 transfers packets with these qurks: 485 // - In the beginning of streaming, the value of dbc is 486 // incremented even if no data blocks are transferred. 487 // - The value of dbc is reset suddenly. 488 if (bebob->version > 2) 489 bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC | 490 CIP_SKIP_DBC_ZERO_CHECK; 491 492 // At high sampling rate, M-Audio special firmware transmits 493 // empty packet with the value of dbc incremented by 8 but the 494 // others are valid to IEC 61883-1. 495 if (bebob->maudio_special_quirk) 496 bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC; 497 } 498 499 return 0; 500 } 501 502 static void destroy_stream(struct snd_bebob *bebob, struct amdtp_stream *stream) 503 { 504 amdtp_stream_destroy(stream); 505 506 if (stream == &bebob->tx_stream) 507 cmp_connection_destroy(&bebob->out_conn); 508 else 509 cmp_connection_destroy(&bebob->in_conn); 510 } 511 512 int snd_bebob_stream_init_duplex(struct snd_bebob *bebob) 513 { 514 int err; 515 516 err = init_stream(bebob, &bebob->tx_stream); 517 if (err < 0) 518 return err; 519 520 err = init_stream(bebob, &bebob->rx_stream); 521 if (err < 0) { 522 destroy_stream(bebob, &bebob->tx_stream); 523 return err; 524 } 525 526 return 0; 527 } 528 529 static int keep_resources(struct snd_bebob *bebob, struct amdtp_stream *stream, 530 unsigned int rate, unsigned int index) 531 { 532 struct snd_bebob_stream_formation *formation; 533 struct cmp_connection *conn; 534 int err; 535 536 if (stream == &bebob->tx_stream) { 537 formation = bebob->tx_stream_formations + index; 538 conn = &bebob->out_conn; 539 } else { 540 formation = bebob->rx_stream_formations + index; 541 conn = &bebob->in_conn; 542 } 543 544 err = amdtp_am824_set_parameters(stream, rate, formation->pcm, 545 formation->midi, false); 546 if (err < 0) 547 return err; 548 549 return cmp_connection_reserve(conn, amdtp_stream_get_max_payload(stream)); 550 } 551 552 int snd_bebob_stream_reserve_duplex(struct snd_bebob *bebob, unsigned int rate) 553 { 554 unsigned int curr_rate; 555 int err; 556 557 // Considering JACK/FFADO streaming: 558 // TODO: This can be removed hwdep functionality becomes popular. 559 err = check_connection_used_by_others(bebob, &bebob->rx_stream); 560 if (err < 0) 561 return err; 562 563 err = bebob->spec->rate->get(bebob, &curr_rate); 564 if (err < 0) 565 return err; 566 if (rate == 0) 567 rate = curr_rate; 568 if (curr_rate != rate) { 569 amdtp_stream_stop(&bebob->tx_stream); 570 amdtp_stream_stop(&bebob->rx_stream); 571 572 break_both_connections(bebob); 573 574 cmp_connection_release(&bebob->out_conn); 575 cmp_connection_release(&bebob->in_conn); 576 } 577 578 if (bebob->substreams_counter == 0 || curr_rate != rate) { 579 unsigned int index; 580 581 // NOTE: 582 // If establishing connections at first, Yamaha GO46 583 // (and maybe Terratec X24) don't generate sound. 584 // 585 // For firmware customized by M-Audio, refer to next NOTE. 586 err = bebob->spec->rate->set(bebob, rate); 587 if (err < 0) { 588 dev_err(&bebob->unit->device, 589 "fail to set sampling rate: %d\n", 590 err); 591 return err; 592 } 593 594 err = get_formation_index(rate, &index); 595 if (err < 0) 596 return err; 597 598 err = keep_resources(bebob, &bebob->tx_stream, rate, index); 599 if (err < 0) 600 return err; 601 602 err = keep_resources(bebob, &bebob->rx_stream, rate, index); 603 if (err < 0) { 604 cmp_connection_release(&bebob->out_conn); 605 return err; 606 } 607 } 608 609 return 0; 610 } 611 612 int snd_bebob_stream_start_duplex(struct snd_bebob *bebob) 613 { 614 int err; 615 616 // Need no substreams. 617 if (bebob->substreams_counter == 0) 618 return -EIO; 619 620 // packet queueing error or detecting discontinuity 621 if (amdtp_streaming_error(&bebob->rx_stream) || 622 amdtp_streaming_error(&bebob->tx_stream)) { 623 amdtp_stream_stop(&bebob->rx_stream); 624 amdtp_stream_stop(&bebob->tx_stream); 625 626 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 dev_err(&bebob->unit->device, 645 "fail to run AMDTP master stream:%d\n", err); 646 goto error; 647 } 648 649 // NOTE: 650 // The firmware customized by M-Audio uses these commands to 651 // start transmitting stream. This is not usual way. 652 if (bebob->maudio_special_quirk) { 653 err = bebob->spec->rate->set(bebob, curr_rate); 654 if (err < 0) { 655 dev_err(&bebob->unit->device, 656 "fail to ensure sampling rate: %d\n", 657 err); 658 goto error; 659 } 660 } 661 662 if (!amdtp_stream_wait_callback(&bebob->rx_stream, 663 CALLBACK_TIMEOUT)) { 664 err = -ETIMEDOUT; 665 goto error; 666 } 667 } 668 669 if (!amdtp_stream_running(&bebob->tx_stream)) { 670 err = start_stream(bebob, &bebob->tx_stream); 671 if (err < 0) { 672 dev_err(&bebob->unit->device, 673 "fail to run AMDTP slave stream:%d\n", err); 674 goto error; 675 } 676 677 if (!amdtp_stream_wait_callback(&bebob->tx_stream, 678 CALLBACK_TIMEOUT)) { 679 err = -ETIMEDOUT; 680 goto error; 681 } 682 } 683 684 return 0; 685 error: 686 amdtp_stream_stop(&bebob->tx_stream); 687 amdtp_stream_stop(&bebob->rx_stream); 688 break_both_connections(bebob); 689 return err; 690 } 691 692 void snd_bebob_stream_stop_duplex(struct snd_bebob *bebob) 693 { 694 if (bebob->substreams_counter == 0) { 695 amdtp_stream_stop(&bebob->rx_stream); 696 amdtp_stream_stop(&bebob->tx_stream); 697 698 break_both_connections(bebob); 699 700 cmp_connection_release(&bebob->out_conn); 701 cmp_connection_release(&bebob->in_conn); 702 } 703 } 704 705 /* 706 * This function should be called before starting streams or after stopping 707 * streams. 708 */ 709 void snd_bebob_stream_destroy_duplex(struct snd_bebob *bebob) 710 { 711 destroy_stream(bebob, &bebob->tx_stream); 712 destroy_stream(bebob, &bebob->rx_stream); 713 } 714 715 /* 716 * See: Table 50: Extended Stream Format Info Format Hierarchy Level 2’ 717 * in Additional AVC commands (Nov 2003, BridgeCo) 718 * Also 'Clause 12 AM824 sequence adaption layers' in IEC 61883-6:2005 719 */ 720 static int 721 parse_stream_formation(u8 *buf, unsigned int len, 722 struct snd_bebob_stream_formation *formation) 723 { 724 unsigned int i, e, channels, format; 725 726 /* 727 * this module can support a hierarchy combination that: 728 * Root: Audio and Music (0x90) 729 * Level 1: AM824 Compound (0x40) 730 */ 731 if ((buf[0] != 0x90) || (buf[1] != 0x40)) 732 return -ENOSYS; 733 734 /* check sampling rate */ 735 for (i = 0; i < ARRAY_SIZE(bridgeco_freq_table); i++) { 736 if (buf[2] == bridgeco_freq_table[i]) 737 break; 738 } 739 if (i == ARRAY_SIZE(bridgeco_freq_table)) 740 return -ENOSYS; 741 742 /* Avoid double count by different entries for the same rate. */ 743 memset(&formation[i], 0, sizeof(struct snd_bebob_stream_formation)); 744 745 for (e = 0; e < buf[4]; e++) { 746 channels = buf[5 + e * 2]; 747 format = buf[6 + e * 2]; 748 749 switch (format) { 750 /* IEC 60958 Conformant, currently handled as MBLA */ 751 case 0x00: 752 /* Multi bit linear audio */ 753 case 0x06: /* Raw */ 754 formation[i].pcm += channels; 755 break; 756 /* MIDI Conformant */ 757 case 0x0d: 758 formation[i].midi += channels; 759 break; 760 /* IEC 61937-3 to 7 */ 761 case 0x01: 762 case 0x02: 763 case 0x03: 764 case 0x04: 765 case 0x05: 766 /* Multi bit linear audio */ 767 case 0x07: /* DVD-Audio */ 768 case 0x0c: /* High Precision */ 769 /* One Bit Audio */ 770 case 0x08: /* (Plain) Raw */ 771 case 0x09: /* (Plain) SACD */ 772 case 0x0a: /* (Encoded) Raw */ 773 case 0x0b: /* (Encoded) SACD */ 774 /* Synchronization Stream (Stereo Raw audio) */ 775 case 0x40: 776 /* Don't care */ 777 case 0xff: 778 default: 779 return -ENOSYS; /* not supported */ 780 } 781 } 782 783 if (formation[i].pcm > AM824_MAX_CHANNELS_FOR_PCM || 784 formation[i].midi > AM824_MAX_CHANNELS_FOR_MIDI) 785 return -ENOSYS; 786 787 return 0; 788 } 789 790 static int 791 fill_stream_formations(struct snd_bebob *bebob, enum avc_bridgeco_plug_dir dir, 792 unsigned short pid) 793 { 794 u8 *buf; 795 struct snd_bebob_stream_formation *formations; 796 unsigned int len, eid; 797 u8 addr[AVC_BRIDGECO_ADDR_BYTES]; 798 int err; 799 800 buf = kmalloc(FORMAT_MAXIMUM_LENGTH, GFP_KERNEL); 801 if (buf == NULL) 802 return -ENOMEM; 803 804 if (dir == AVC_BRIDGECO_PLUG_DIR_IN) 805 formations = bebob->rx_stream_formations; 806 else 807 formations = bebob->tx_stream_formations; 808 809 for (eid = 0; eid < SND_BEBOB_STRM_FMT_ENTRIES; eid++) { 810 len = FORMAT_MAXIMUM_LENGTH; 811 avc_bridgeco_fill_unit_addr(addr, dir, 812 AVC_BRIDGECO_PLUG_UNIT_ISOC, pid); 813 err = avc_bridgeco_get_plug_strm_fmt(bebob->unit, addr, buf, 814 &len, eid); 815 /* No entries remained. */ 816 if (err == -EINVAL && eid > 0) { 817 err = 0; 818 break; 819 } else if (err < 0) { 820 dev_err(&bebob->unit->device, 821 "fail to get stream format %d for isoc %s plug %d:%d\n", 822 eid, 823 (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" : 824 "out", 825 pid, err); 826 break; 827 } 828 829 err = parse_stream_formation(buf, len, formations); 830 if (err < 0) 831 break; 832 } 833 834 kfree(buf); 835 return err; 836 } 837 838 static int 839 seek_msu_sync_input_plug(struct snd_bebob *bebob) 840 { 841 u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES]; 842 unsigned int i; 843 enum avc_bridgeco_plug_type type; 844 int err; 845 846 /* Get the number of Music Sub Unit for both direction. */ 847 err = avc_general_get_plug_info(bebob->unit, 0x0c, 0x00, 0x00, plugs); 848 if (err < 0) { 849 dev_err(&bebob->unit->device, 850 "fail to get info for MSU in/out plugs: %d\n", 851 err); 852 goto end; 853 } 854 855 /* seek destination plugs for 'MSU sync input' */ 856 bebob->sync_input_plug = -1; 857 for (i = 0; i < plugs[0]; i++) { 858 avc_bridgeco_fill_msu_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, i); 859 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 860 if (err < 0) { 861 dev_err(&bebob->unit->device, 862 "fail to get type for MSU in plug %d: %d\n", 863 i, err); 864 goto end; 865 } 866 867 if (type == AVC_BRIDGECO_PLUG_TYPE_SYNC) { 868 bebob->sync_input_plug = i; 869 break; 870 } 871 } 872 end: 873 return err; 874 } 875 876 int snd_bebob_stream_discover(struct snd_bebob *bebob) 877 { 878 const struct snd_bebob_clock_spec *clk_spec = bebob->spec->clock; 879 u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES]; 880 enum avc_bridgeco_plug_type type; 881 unsigned int i; 882 int err; 883 884 /* the number of plugs for isoc in/out, ext in/out */ 885 err = avc_general_get_plug_info(bebob->unit, 0x1f, 0x07, 0x00, plugs); 886 if (err < 0) { 887 dev_err(&bebob->unit->device, 888 "fail to get info for isoc/external in/out plugs: %d\n", 889 err); 890 goto end; 891 } 892 893 /* 894 * This module supports at least one isoc input plug and one isoc 895 * output plug. 896 */ 897 if ((plugs[0] == 0) || (plugs[1] == 0)) { 898 err = -ENOSYS; 899 goto end; 900 } 901 902 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, 903 AVC_BRIDGECO_PLUG_UNIT_ISOC, 0); 904 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 905 if (err < 0) { 906 dev_err(&bebob->unit->device, 907 "fail to get type for isoc in plug 0: %d\n", err); 908 goto end; 909 } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) { 910 err = -ENOSYS; 911 goto end; 912 } 913 err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_IN, 0); 914 if (err < 0) 915 goto end; 916 917 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT, 918 AVC_BRIDGECO_PLUG_UNIT_ISOC, 0); 919 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 920 if (err < 0) { 921 dev_err(&bebob->unit->device, 922 "fail to get type for isoc out plug 0: %d\n", err); 923 goto end; 924 } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) { 925 err = -ENOSYS; 926 goto end; 927 } 928 err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_OUT, 0); 929 if (err < 0) 930 goto end; 931 932 /* count external input plugs for MIDI */ 933 bebob->midi_input_ports = 0; 934 for (i = 0; i < plugs[2]; i++) { 935 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, 936 AVC_BRIDGECO_PLUG_UNIT_EXT, i); 937 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 938 if (err < 0) { 939 dev_err(&bebob->unit->device, 940 "fail to get type for external in plug %d: %d\n", 941 i, err); 942 goto end; 943 } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) { 944 bebob->midi_input_ports++; 945 } 946 } 947 948 /* count external output plugs for MIDI */ 949 bebob->midi_output_ports = 0; 950 for (i = 0; i < plugs[3]; i++) { 951 avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT, 952 AVC_BRIDGECO_PLUG_UNIT_EXT, i); 953 err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 954 if (err < 0) { 955 dev_err(&bebob->unit->device, 956 "fail to get type for external out plug %d: %d\n", 957 i, err); 958 goto end; 959 } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) { 960 bebob->midi_output_ports++; 961 } 962 } 963 964 /* for check source of clock later */ 965 if (!clk_spec) 966 err = seek_msu_sync_input_plug(bebob); 967 end: 968 return err; 969 } 970 971 void snd_bebob_stream_lock_changed(struct snd_bebob *bebob) 972 { 973 bebob->dev_lock_changed = true; 974 wake_up(&bebob->hwdep_wait); 975 } 976 977 int snd_bebob_stream_lock_try(struct snd_bebob *bebob) 978 { 979 int err; 980 981 spin_lock_irq(&bebob->lock); 982 983 /* user land lock this */ 984 if (bebob->dev_lock_count < 0) { 985 err = -EBUSY; 986 goto end; 987 } 988 989 /* this is the first time */ 990 if (bebob->dev_lock_count++ == 0) 991 snd_bebob_stream_lock_changed(bebob); 992 err = 0; 993 end: 994 spin_unlock_irq(&bebob->lock); 995 return err; 996 } 997 998 void snd_bebob_stream_lock_release(struct snd_bebob *bebob) 999 { 1000 spin_lock_irq(&bebob->lock); 1001 1002 if (WARN_ON(bebob->dev_lock_count <= 0)) 1003 goto end; 1004 if (--bebob->dev_lock_count == 0) 1005 snd_bebob_stream_lock_changed(bebob); 1006 end: 1007 spin_unlock_irq(&bebob->lock); 1008 } 1009