btsco.c revision 1.26
1 /* $NetBSD: btsco.c,v 1.26 2011/12/10 16:16:11 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2006 Itronix Inc. 5 * All rights reserved. 6 * 7 * Written by Iain Hibbert for Itronix Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. The name of Itronix Inc. may not be used to endorse 18 * or promote products derived from this software without specific 19 * prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY 25 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 26 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 28 * ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: btsco.c,v 1.26 2011/12/10 16:16:11 jmcneill Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/audioio.h> 39 #include <sys/conf.h> 40 #include <sys/device.h> 41 #include <sys/fcntl.h> 42 #include <sys/kernel.h> 43 #include <sys/queue.h> 44 #include <sys/kmem.h> 45 #include <sys/mbuf.h> 46 #include <sys/proc.h> 47 #include <sys/socketvar.h> 48 #include <sys/systm.h> 49 #include <sys/intr.h> 50 51 #include <prop/proplib.h> 52 53 #include <netbt/bluetooth.h> 54 #include <netbt/rfcomm.h> 55 #include <netbt/sco.h> 56 57 #include <dev/audio_if.h> 58 #include <dev/auconv.h> 59 #include <dev/mulaw.h> 60 61 #include <dev/bluetooth/btdev.h> 62 #include <dev/bluetooth/btsco.h> 63 64 #undef DPRINTF 65 #undef DPRINTFN 66 67 #ifdef BTSCO_DEBUG 68 int btsco_debug = BTSCO_DEBUG; 69 #define DPRINTF(...) do { \ 70 if (btsco_debug) { \ 71 printf("%s: ", __func__); \ 72 printf(__VA_ARGS__); \ 73 } \ 74 } while (/* CONSTCOND */0) 75 76 #define DPRINTFN(n, ...) do { \ 77 if (btsco_debug > (n)) { \ 78 printf("%s: ", __func__); \ 79 printf(__VA_ARGS__); \ 80 } \ 81 } while (/* CONSTCOND */0) 82 #else 83 #define DPRINTF(...) 84 #define DPRINTFN(...) 85 #endif 86 87 /***************************************************************************** 88 * 89 * Bluetooth SCO Audio device 90 */ 91 92 /* btsco softc */ 93 struct btsco_softc { 94 uint16_t sc_flags; 95 const char *sc_name; /* our device_xname */ 96 97 device_t sc_audio; /* MI audio device */ 98 void *sc_intr; /* interrupt cookie */ 99 kcondvar_t sc_connect; /* connect wait */ 100 kmutex_t sc_intr_lock; /* for audio */ 101 102 /* Bluetooth */ 103 bdaddr_t sc_laddr; /* local address */ 104 bdaddr_t sc_raddr; /* remote address */ 105 uint16_t sc_state; /* link state */ 106 struct sco_pcb *sc_sco; /* SCO handle */ 107 struct sco_pcb *sc_sco_l; /* SCO listen handle */ 108 uint16_t sc_mtu; /* SCO mtu */ 109 uint8_t sc_channel; /* RFCOMM channel */ 110 int sc_err; /* stored error */ 111 112 /* Receive */ 113 int sc_rx_want; /* bytes wanted */ 114 uint8_t *sc_rx_block; /* receive block */ 115 void (*sc_rx_intr)(void *); /* callback */ 116 void *sc_rx_intrarg; /* callback arg */ 117 struct mbuf *sc_rx_mbuf; /* leftover mbuf */ 118 119 /* Transmit */ 120 int sc_tx_size; /* bytes to send */ 121 int sc_tx_pending; /* packets pending */ 122 uint8_t *sc_tx_block; /* transmit block */ 123 void (*sc_tx_intr)(void *); /* callback */ 124 void *sc_tx_intrarg; /* callback arg */ 125 void *sc_tx_buf; /* transmit buffer */ 126 int sc_tx_refcnt; /* buffer refcnt */ 127 128 /* mixer data */ 129 int sc_vgs; /* speaker volume */ 130 int sc_vgm; /* mic volume */ 131 }; 132 133 /* sc_state */ 134 #define BTSCO_CLOSED 0 135 #define BTSCO_WAIT_CONNECT 1 136 #define BTSCO_OPEN 2 137 138 /* sc_flags */ 139 #define BTSCO_LISTEN (1 << 1) 140 141 /* autoconf(9) glue */ 142 static int btsco_match(device_t, cfdata_t, void *); 143 static void btsco_attach(device_t, device_t, void *); 144 static int btsco_detach(device_t, int); 145 146 CFATTACH_DECL_NEW(btsco, sizeof(struct btsco_softc), 147 btsco_match, btsco_attach, btsco_detach, NULL); 148 149 /* audio(9) glue */ 150 static int btsco_open(void *, int); 151 static void btsco_close(void *); 152 static int btsco_query_encoding(void *, struct audio_encoding *); 153 static int btsco_set_params(void *, int, int, audio_params_t *, audio_params_t *, 154 stream_filter_list_t *, stream_filter_list_t *); 155 static int btsco_round_blocksize(void *, int, int, const audio_params_t *); 156 static int btsco_start_output(void *, void *, int, void (*)(void *), void *); 157 static int btsco_start_input(void *, void *, int, void (*)(void *), void *); 158 static int btsco_halt_output(void *); 159 static int btsco_halt_input(void *); 160 static int btsco_getdev(void *, struct audio_device *); 161 static int btsco_setfd(void *, int); 162 static int btsco_set_port(void *, mixer_ctrl_t *); 163 static int btsco_get_port(void *, mixer_ctrl_t *); 164 static int btsco_query_devinfo(void *, mixer_devinfo_t *); 165 static void *btsco_allocm(void *, int, size_t); 166 static void btsco_freem(void *, void *, size_t); 167 static int btsco_get_props(void *); 168 static int btsco_dev_ioctl(void *, u_long, void *, int, struct lwp *); 169 static void btsco_get_locks(void *, kmutex_t **, kmutex_t **); 170 171 static const struct audio_hw_if btsco_if = { 172 btsco_open, /* open */ 173 btsco_close, /* close */ 174 NULL, /* drain */ 175 btsco_query_encoding, /* query_encoding */ 176 btsco_set_params, /* set_params */ 177 btsco_round_blocksize, /* round_blocksize */ 178 NULL, /* commit_settings */ 179 NULL, /* init_output */ 180 NULL, /* init_input */ 181 btsco_start_output, /* start_output */ 182 btsco_start_input, /* start_input */ 183 btsco_halt_output, /* halt_output */ 184 btsco_halt_input, /* halt_input */ 185 NULL, /* speaker_ctl */ 186 btsco_getdev, /* getdev */ 187 btsco_setfd, /* setfd */ 188 btsco_set_port, /* set_port */ 189 btsco_get_port, /* get_port */ 190 btsco_query_devinfo, /* query_devinfo */ 191 btsco_allocm, /* allocm */ 192 btsco_freem, /* freem */ 193 NULL, /* round_buffersize */ 194 NULL, /* mappage */ 195 btsco_get_props, /* get_props */ 196 NULL, /* trigger_output */ 197 NULL, /* trigger_input */ 198 btsco_dev_ioctl, /* dev_ioctl */ 199 btsco_get_locks, /* get_locks */ 200 }; 201 202 static const struct audio_device btsco_device = { 203 "Bluetooth Audio", 204 "", 205 "btsco" 206 }; 207 208 /* Voice_Setting == 0x0060: 8000Hz, mono, 16-bit, slinear_le */ 209 static const struct audio_format btsco_format = { 210 NULL, /* driver_data */ 211 (AUMODE_PLAY | AUMODE_RECORD), /* mode */ 212 AUDIO_ENCODING_SLINEAR_LE, /* encoding */ 213 16, /* validbits */ 214 16, /* precision */ 215 1, /* channels */ 216 AUFMT_MONAURAL, /* channel_mask */ 217 1, /* frequency_type */ 218 { 8000 } /* frequency */ 219 }; 220 221 /* bluetooth(9) glue for SCO */ 222 static void btsco_sco_connecting(void *); 223 static void btsco_sco_connected(void *); 224 static void btsco_sco_disconnected(void *, int); 225 static void *btsco_sco_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *); 226 static void btsco_sco_complete(void *, int); 227 static void btsco_sco_linkmode(void *, int); 228 static void btsco_sco_input(void *, struct mbuf *); 229 230 static const struct btproto btsco_sco_proto = { 231 btsco_sco_connecting, 232 btsco_sco_connected, 233 btsco_sco_disconnected, 234 btsco_sco_newconn, 235 btsco_sco_complete, 236 btsco_sco_linkmode, 237 btsco_sco_input, 238 }; 239 240 241 /***************************************************************************** 242 * 243 * btsco definitions 244 */ 245 246 /* 247 * btsco mixer class 248 */ 249 #define BTSCO_VGS 0 250 #define BTSCO_VGM 1 251 #define BTSCO_INPUT_CLASS 2 252 #define BTSCO_OUTPUT_CLASS 3 253 254 /* connect timeout */ 255 #define BTSCO_TIMEOUT (30 * hz) 256 257 /* misc btsco functions */ 258 static void btsco_extfree(struct mbuf *, void *, size_t, void *); 259 static void btsco_intr(void *); 260 261 262 /***************************************************************************** 263 * 264 * btsco autoconf(9) routines 265 */ 266 267 static int 268 btsco_match(device_t self, cfdata_t cfdata, void *aux) 269 { 270 prop_dictionary_t dict = aux; 271 prop_object_t obj; 272 273 obj = prop_dictionary_get(dict, BTDEVservice); 274 if (prop_string_equals_cstring(obj, "HSET")) 275 return 1; 276 277 if (prop_string_equals_cstring(obj, "HF")) 278 return 1; 279 280 return 0; 281 } 282 283 static void 284 btsco_attach(device_t parent, device_t self, void *aux) 285 { 286 struct btsco_softc *sc = device_private(self); 287 prop_dictionary_t dict = aux; 288 prop_object_t obj; 289 290 /* 291 * Init softc 292 */ 293 sc->sc_vgs = 200; 294 sc->sc_vgm = 200; 295 sc->sc_state = BTSCO_CLOSED; 296 sc->sc_name = device_xname(self); 297 cv_init(&sc->sc_connect, "connect"); 298 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_NONE); 299 300 /* 301 * copy in our configuration info 302 */ 303 obj = prop_dictionary_get(dict, BTDEVladdr); 304 bdaddr_copy(&sc->sc_laddr, prop_data_data_nocopy(obj)); 305 306 obj = prop_dictionary_get(dict, BTDEVraddr); 307 bdaddr_copy(&sc->sc_raddr, prop_data_data_nocopy(obj)); 308 309 obj = prop_dictionary_get(dict, BTDEVservice); 310 if (prop_string_equals_cstring(obj, "HF")) { 311 sc->sc_flags |= BTSCO_LISTEN; 312 aprint_verbose(" listen mode"); 313 } 314 315 obj = prop_dictionary_get(dict, BTSCOchannel); 316 if (prop_object_type(obj) != PROP_TYPE_NUMBER 317 || prop_number_integer_value(obj) < RFCOMM_CHANNEL_MIN 318 || prop_number_integer_value(obj) > RFCOMM_CHANNEL_MAX) { 319 aprint_error(" invalid %s", BTSCOchannel); 320 return; 321 } 322 sc->sc_channel = prop_number_integer_value(obj); 323 324 aprint_verbose(" channel %d", sc->sc_channel); 325 aprint_normal("\n"); 326 327 DPRINTF("sc=%p\n", sc); 328 329 /* 330 * set up transmit interrupt 331 */ 332 sc->sc_intr = softint_establish(SOFTINT_NET, btsco_intr, sc); 333 if (sc->sc_intr == NULL) { 334 aprint_error_dev(self, "softint_establish failed\n"); 335 return; 336 } 337 338 /* 339 * attach audio device 340 */ 341 sc->sc_audio = audio_attach_mi(&btsco_if, sc, self); 342 if (sc->sc_audio == NULL) { 343 aprint_error_dev(self, "audio_attach_mi failed\n"); 344 return; 345 } 346 } 347 348 static int 349 btsco_detach(device_t self, int flags) 350 { 351 struct btsco_softc *sc = device_private(self); 352 353 DPRINTF("sc=%p\n", sc); 354 355 mutex_enter(bt_lock); 356 if (sc->sc_sco != NULL) { 357 DPRINTF("sc_sco=%p\n", sc->sc_sco); 358 sco_disconnect(sc->sc_sco, 0); 359 sco_detach(&sc->sc_sco); 360 sc->sc_sco = NULL; 361 } 362 363 if (sc->sc_sco_l != NULL) { 364 DPRINTF("sc_sco_l=%p\n", sc->sc_sco_l); 365 sco_detach(&sc->sc_sco_l); 366 sc->sc_sco_l = NULL; 367 } 368 mutex_exit(bt_lock); 369 370 if (sc->sc_audio != NULL) { 371 DPRINTF("sc_audio=%p\n", sc->sc_audio); 372 config_detach(sc->sc_audio, flags); 373 sc->sc_audio = NULL; 374 } 375 376 if (sc->sc_intr != NULL) { 377 softint_disestablish(sc->sc_intr); 378 sc->sc_intr = NULL; 379 } 380 381 if (sc->sc_rx_mbuf != NULL) { 382 m_freem(sc->sc_rx_mbuf); 383 sc->sc_rx_mbuf = NULL; 384 } 385 386 if (sc->sc_tx_refcnt > 0) { 387 aprint_error_dev(self, "tx_refcnt=%d!\n", sc->sc_tx_refcnt); 388 389 if ((flags & DETACH_FORCE) == 0) 390 return EAGAIN; 391 } 392 393 cv_destroy(&sc->sc_connect); 394 mutex_destroy(&sc->sc_intr_lock); 395 396 return 0; 397 } 398 399 /***************************************************************************** 400 * 401 * bluetooth(9) methods for SCO 402 * 403 * All these are called from Bluetooth Protocol code, in a soft 404 * interrupt context at IPL_SOFTNET. 405 */ 406 407 static void 408 btsco_sco_connecting(void *arg) 409 { 410 /* struct btsco_softc *sc = arg; */ 411 412 /* dont care */ 413 } 414 415 static void 416 btsco_sco_connected(void *arg) 417 { 418 struct btsco_softc *sc = arg; 419 420 DPRINTF("%s\n", sc->sc_name); 421 422 KASSERT(sc->sc_sco != NULL); 423 KASSERT(sc->sc_state == BTSCO_WAIT_CONNECT); 424 425 /* 426 * If we are listening, no more need 427 */ 428 if (sc->sc_sco_l != NULL) 429 sco_detach(&sc->sc_sco_l); 430 431 sc->sc_state = BTSCO_OPEN; 432 cv_broadcast(&sc->sc_connect); 433 } 434 435 static void 436 btsco_sco_disconnected(void *arg, int err) 437 { 438 struct btsco_softc *sc = arg; 439 440 DPRINTF("%s sc_state %d\n", sc->sc_name, sc->sc_state); 441 442 KASSERT(sc->sc_sco != NULL); 443 444 sc->sc_err = err; 445 sco_detach(&sc->sc_sco); 446 447 switch (sc->sc_state) { 448 case BTSCO_CLOSED: /* dont think this can happen */ 449 break; 450 451 case BTSCO_WAIT_CONNECT: /* connect failed */ 452 cv_broadcast(&sc->sc_connect); 453 break; 454 455 case BTSCO_OPEN: /* link lost */ 456 /* 457 * If IO is in progress, tell the audio driver that it 458 * has completed so that when it tries to send more, we 459 * can indicate an error. 460 */ 461 mutex_spin_enter(&sc->sc_intr_lock); 462 if (sc->sc_tx_pending > 0) { 463 sc->sc_tx_pending = 0; 464 (*sc->sc_tx_intr)(sc->sc_tx_intrarg); 465 } 466 if (sc->sc_rx_want > 0) { 467 sc->sc_rx_want = 0; 468 (*sc->sc_rx_intr)(sc->sc_rx_intrarg); 469 } 470 mutex_spin_exit(&sc->sc_intr_lock); 471 break; 472 473 default: 474 UNKNOWN(sc->sc_state); 475 } 476 477 sc->sc_state = BTSCO_CLOSED; 478 } 479 480 static void * 481 btsco_sco_newconn(void *arg, struct sockaddr_bt *laddr, 482 struct sockaddr_bt *raddr) 483 { 484 struct btsco_softc *sc = arg; 485 486 DPRINTF("%s\n", sc->sc_name); 487 488 if (bdaddr_same(&raddr->bt_bdaddr, &sc->sc_raddr) == 0 489 || sc->sc_state != BTSCO_WAIT_CONNECT 490 || sc->sc_sco != NULL) 491 return NULL; 492 493 sco_attach(&sc->sc_sco, &btsco_sco_proto, sc); 494 return sc->sc_sco; 495 } 496 497 static void 498 btsco_sco_complete(void *arg, int count) 499 { 500 struct btsco_softc *sc = arg; 501 502 DPRINTFN(10, "%s count %d\n", sc->sc_name, count); 503 504 mutex_spin_enter(&sc->sc_intr_lock); 505 if (sc->sc_tx_pending > 0) { 506 sc->sc_tx_pending -= count; 507 if (sc->sc_tx_pending == 0) 508 (*sc->sc_tx_intr)(sc->sc_tx_intrarg); 509 } 510 mutex_spin_exit(&sc->sc_intr_lock); 511 } 512 513 static void 514 btsco_sco_linkmode(void *arg, int new) 515 { 516 /* struct btsco_softc *sc = arg; */ 517 518 /* dont care */ 519 } 520 521 static void 522 btsco_sco_input(void *arg, struct mbuf *m) 523 { 524 struct btsco_softc *sc = arg; 525 int len; 526 527 DPRINTFN(10, "%s len=%d\n", sc->sc_name, m->m_pkthdr.len); 528 529 mutex_spin_enter(&sc->sc_intr_lock); 530 if (sc->sc_rx_want == 0) { 531 m_freem(m); 532 } else { 533 KASSERT(sc->sc_rx_intr != NULL); 534 KASSERT(sc->sc_rx_block != NULL); 535 536 len = MIN(sc->sc_rx_want, m->m_pkthdr.len); 537 m_copydata(m, 0, len, sc->sc_rx_block); 538 539 sc->sc_rx_want -= len; 540 sc->sc_rx_block += len; 541 542 if (len > m->m_pkthdr.len) { 543 if (sc->sc_rx_mbuf != NULL) 544 m_freem(sc->sc_rx_mbuf); 545 546 m_adj(m, len); 547 sc->sc_rx_mbuf = m; 548 } else { 549 m_freem(m); 550 } 551 552 if (sc->sc_rx_want == 0) 553 (*sc->sc_rx_intr)(sc->sc_rx_intrarg); 554 } 555 mutex_spin_exit(&sc->sc_intr_lock); 556 } 557 558 559 /***************************************************************************** 560 * 561 * audio(9) methods 562 * 563 */ 564 565 static int 566 btsco_open(void *hdl, int flags) 567 { 568 struct sockaddr_bt sa; 569 struct btsco_softc *sc = hdl; 570 struct sockopt sopt; 571 int err, timo; 572 573 DPRINTF("%s flags 0x%x\n", sc->sc_name, flags); 574 /* flags FREAD & FWRITE? */ 575 576 if (sc->sc_sco != NULL || sc->sc_sco_l != NULL) 577 return EIO; 578 579 KASSERT(mutex_owned(bt_lock)); 580 581 memset(&sa, 0, sizeof(sa)); 582 sa.bt_len = sizeof(sa); 583 sa.bt_family = AF_BLUETOOTH; 584 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr); 585 586 if (sc->sc_flags & BTSCO_LISTEN) { 587 err = sco_attach(&sc->sc_sco_l, &btsco_sco_proto, sc); 588 if (err) 589 goto done; 590 591 err = sco_bind(sc->sc_sco_l, &sa); 592 if (err) { 593 sco_detach(&sc->sc_sco_l); 594 goto done; 595 } 596 597 err = sco_listen(sc->sc_sco_l); 598 if (err) { 599 sco_detach(&sc->sc_sco_l); 600 goto done; 601 } 602 603 timo = 0; /* no timeout */ 604 } else { 605 err = sco_attach(&sc->sc_sco, &btsco_sco_proto, sc); 606 if (err) 607 goto done; 608 609 err = sco_bind(sc->sc_sco, &sa); 610 if (err) { 611 sco_detach(&sc->sc_sco); 612 goto done; 613 } 614 615 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_raddr); 616 err = sco_connect(sc->sc_sco, &sa); 617 if (err) { 618 sco_detach(&sc->sc_sco); 619 goto done; 620 } 621 622 timo = BTSCO_TIMEOUT; 623 } 624 625 sc->sc_state = BTSCO_WAIT_CONNECT; 626 while (err == 0 && sc->sc_state == BTSCO_WAIT_CONNECT) 627 err = cv_timedwait_sig(&sc->sc_connect, bt_lock, timo); 628 629 switch (sc->sc_state) { 630 case BTSCO_CLOSED: /* disconnected */ 631 err = sc->sc_err; 632 633 /* fall through to */ 634 case BTSCO_WAIT_CONNECT: /* error */ 635 if (sc->sc_sco != NULL) 636 sco_detach(&sc->sc_sco); 637 638 if (sc->sc_sco_l != NULL) 639 sco_detach(&sc->sc_sco_l); 640 641 break; 642 643 case BTSCO_OPEN: /* hurrah */ 644 sockopt_init(&sopt, BTPROTO_SCO, SO_SCO_MTU, 0); 645 (void)sco_getopt(sc->sc_sco, &sopt); 646 (void)sockopt_get(&sopt, &sc->sc_mtu, sizeof(sc->sc_mtu)); 647 sockopt_destroy(&sopt); 648 break; 649 650 default: 651 UNKNOWN(sc->sc_state); 652 break; 653 } 654 655 done: 656 DPRINTF("done err=%d, sc_state=%d, sc_mtu=%d\n", 657 err, sc->sc_state, sc->sc_mtu); 658 return err; 659 } 660 661 static void 662 btsco_close(void *hdl) 663 { 664 struct btsco_softc *sc = hdl; 665 666 DPRINTF("%s\n", sc->sc_name); 667 668 KASSERT(mutex_owned(bt_lock)); 669 670 if (sc->sc_sco != NULL) { 671 sco_disconnect(sc->sc_sco, 0); 672 sco_detach(&sc->sc_sco); 673 } 674 675 if (sc->sc_sco_l != NULL) { 676 sco_detach(&sc->sc_sco_l); 677 } 678 679 if (sc->sc_rx_mbuf != NULL) { 680 m_freem(sc->sc_rx_mbuf); 681 sc->sc_rx_mbuf = NULL; 682 } 683 684 sc->sc_rx_want = 0; 685 sc->sc_rx_block = NULL; 686 sc->sc_rx_intr = NULL; 687 sc->sc_rx_intrarg = NULL; 688 689 sc->sc_tx_size = 0; 690 sc->sc_tx_block = NULL; 691 sc->sc_tx_pending = 0; 692 sc->sc_tx_intr = NULL; 693 sc->sc_tx_intrarg = NULL; 694 } 695 696 static int 697 btsco_query_encoding(void *hdl, struct audio_encoding *ae) 698 { 699 /* struct btsco_softc *sc = hdl; */ 700 int err = 0; 701 702 switch (ae->index) { 703 case 0: 704 strcpy(ae->name, AudioEslinear_le); 705 ae->encoding = AUDIO_ENCODING_SLINEAR_LE; 706 ae->precision = 16; 707 ae->flags = 0; 708 break; 709 710 default: 711 err = EINVAL; 712 } 713 714 return err; 715 } 716 717 static int 718 btsco_set_params(void *hdl, int setmode, int usemode, 719 audio_params_t *play, audio_params_t *rec, 720 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 721 { 722 /* struct btsco_softc *sc = hdl; */ 723 const struct audio_format *f; 724 int rv; 725 726 DPRINTF("setmode 0x%x usemode 0x%x\n", setmode, usemode); 727 DPRINTF("rate %d, precision %d, channels %d encoding %d\n", 728 play->sample_rate, play->precision, play->channels, play->encoding); 729 730 /* 731 * If we had a list of formats, we could check the HCI_Voice_Setting 732 * and select the appropriate one to use. Currently only one is 733 * supported: 0x0060 == 8000Hz, mono, 16-bit, slinear_le 734 */ 735 f = &btsco_format; 736 737 if (setmode & AUMODE_PLAY) { 738 rv = auconv_set_converter(f, 1, AUMODE_PLAY, play, TRUE, pfil); 739 if (rv < 0) 740 return EINVAL; 741 } 742 743 if (setmode & AUMODE_RECORD) { 744 rv = auconv_set_converter(f, 1, AUMODE_RECORD, rec, TRUE, rfil); 745 if (rv < 0) 746 return EINVAL; 747 } 748 749 return 0; 750 } 751 752 /* 753 * If we have an MTU value to use, round the blocksize to that. 754 */ 755 static int 756 btsco_round_blocksize(void *hdl, int bs, int mode, 757 const audio_params_t *param) 758 { 759 struct btsco_softc *sc = hdl; 760 761 if (sc->sc_mtu > 0) { 762 bs = (bs / sc->sc_mtu) * sc->sc_mtu; 763 if (bs == 0) 764 bs = sc->sc_mtu; 765 } 766 767 DPRINTF("%s mode=0x%x, bs=%d, sc_mtu=%d\n", 768 sc->sc_name, mode, bs, sc->sc_mtu); 769 770 return bs; 771 } 772 773 /* 774 * Start Output 775 * 776 * We dont want to be calling the network stack with sc_intr_lock held 777 * so make a note of what is to be sent, and schedule an interrupt to 778 * bundle it up and queue it. 779 */ 780 static int 781 btsco_start_output(void *hdl, void *block, int blksize, 782 void (*intr)(void *), void *intrarg) 783 { 784 struct btsco_softc *sc = hdl; 785 786 DPRINTFN(5, "%s blksize %d\n", sc->sc_name, blksize); 787 788 if (sc->sc_sco == NULL) 789 return ENOTCONN; /* connection lost */ 790 791 sc->sc_tx_block = block; 792 sc->sc_tx_pending = 0; 793 sc->sc_tx_size = blksize; 794 sc->sc_tx_intr = intr; 795 sc->sc_tx_intrarg = intrarg; 796 797 softint_schedule(sc->sc_intr); 798 return 0; 799 } 800 801 /* 802 * Start Input 803 * 804 * When the SCO link is up, we are getting data in any case, so all we do 805 * is note what we want and where to put it and let the sco_input routine 806 * fill in the data. 807 * 808 * If there was any leftover data that didnt fit in the last block, retry 809 * it now. 810 */ 811 static int 812 btsco_start_input(void *hdl, void *block, int blksize, 813 void (*intr)(void *), void *intrarg) 814 { 815 struct btsco_softc *sc = hdl; 816 struct mbuf *m; 817 818 DPRINTFN(5, "%s blksize %d\n", sc->sc_name, blksize); 819 820 if (sc->sc_sco == NULL) 821 return ENOTCONN; 822 823 sc->sc_rx_want = blksize; 824 sc->sc_rx_block = block; 825 sc->sc_rx_intr = intr; 826 sc->sc_rx_intrarg = intrarg; 827 828 if (sc->sc_rx_mbuf != NULL) { 829 m = sc->sc_rx_mbuf; 830 sc->sc_rx_mbuf = NULL; 831 btsco_sco_input(sc, m); 832 } 833 834 return 0; 835 } 836 837 /* 838 * Halt Output 839 * 840 * This doesnt really halt the output, but it will look 841 * that way to the audio driver. The current block will 842 * still be transmitted. 843 */ 844 static int 845 btsco_halt_output(void *hdl) 846 { 847 struct btsco_softc *sc = hdl; 848 849 DPRINTFN(5, "%s\n", sc->sc_name); 850 851 sc->sc_tx_size = 0; 852 sc->sc_tx_block = NULL; 853 sc->sc_tx_pending = 0; 854 sc->sc_tx_intr = NULL; 855 sc->sc_tx_intrarg = NULL; 856 857 return 0; 858 } 859 860 /* 861 * Halt Input 862 * 863 * This doesnt really halt the input, but it will look 864 * that way to the audio driver. Incoming data will be 865 * discarded. 866 */ 867 static int 868 btsco_halt_input(void *hdl) 869 { 870 struct btsco_softc *sc = hdl; 871 872 DPRINTFN(5, "%s\n", sc->sc_name); 873 874 sc->sc_rx_want = 0; 875 sc->sc_rx_block = NULL; 876 sc->sc_rx_intr = NULL; 877 sc->sc_rx_intrarg = NULL; 878 879 if (sc->sc_rx_mbuf != NULL) { 880 m_freem(sc->sc_rx_mbuf); 881 sc->sc_rx_mbuf = NULL; 882 } 883 884 return 0; 885 } 886 887 static int 888 btsco_getdev(void *hdl, struct audio_device *ret) 889 { 890 891 *ret = btsco_device; 892 return 0; 893 } 894 895 static int 896 btsco_setfd(void *hdl, int fd) 897 { 898 DPRINTF("set %s duplex\n", fd ? "full" : "half"); 899 900 return 0; 901 } 902 903 static int 904 btsco_set_port(void *hdl, mixer_ctrl_t *mc) 905 { 906 struct btsco_softc *sc = hdl; 907 int err = 0; 908 909 DPRINTF("%s dev %d type %d\n", sc->sc_name, mc->dev, mc->type); 910 911 switch (mc->dev) { 912 case BTSCO_VGS: 913 if (mc->type != AUDIO_MIXER_VALUE || 914 mc->un.value.num_channels != 1) { 915 err = EINVAL; 916 break; 917 } 918 919 sc->sc_vgs = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 920 break; 921 922 case BTSCO_VGM: 923 if (mc->type != AUDIO_MIXER_VALUE || 924 mc->un.value.num_channels != 1) { 925 err = EINVAL; 926 break; 927 } 928 929 sc->sc_vgm = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 930 break; 931 932 default: 933 err = EINVAL; 934 break; 935 } 936 937 return err; 938 } 939 940 static int 941 btsco_get_port(void *hdl, mixer_ctrl_t *mc) 942 { 943 struct btsco_softc *sc = hdl; 944 int err = 0; 945 946 DPRINTF("%s dev %d\n", sc->sc_name, mc->dev); 947 948 switch (mc->dev) { 949 case BTSCO_VGS: 950 mc->type = AUDIO_MIXER_VALUE; 951 mc->un.value.num_channels = 1; 952 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_vgs; 953 break; 954 955 case BTSCO_VGM: 956 mc->type = AUDIO_MIXER_VALUE; 957 mc->un.value.num_channels = 1; 958 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_vgm; 959 break; 960 961 default: 962 err = EINVAL; 963 break; 964 } 965 966 return err; 967 } 968 969 static int 970 btsco_query_devinfo(void *hdl, mixer_devinfo_t *di) 971 { 972 /* struct btsco_softc *sc = hdl; */ 973 int err = 0; 974 975 switch(di->index) { 976 case BTSCO_VGS: 977 di->mixer_class = BTSCO_INPUT_CLASS; 978 di->next = di->prev = AUDIO_MIXER_LAST; 979 strcpy(di->label.name, AudioNspeaker); 980 di->type = AUDIO_MIXER_VALUE; 981 strcpy(di->un.v.units.name, AudioNvolume); 982 di->un.v.num_channels = 1; 983 di->un.v.delta = BTSCO_DELTA; 984 break; 985 986 case BTSCO_VGM: 987 di->mixer_class = BTSCO_INPUT_CLASS; 988 di->next = di->prev = AUDIO_MIXER_LAST; 989 strcpy(di->label.name, AudioNmicrophone); 990 di->type = AUDIO_MIXER_VALUE; 991 strcpy(di->un.v.units.name, AudioNvolume); 992 di->un.v.num_channels = 1; 993 di->un.v.delta = BTSCO_DELTA; 994 break; 995 996 case BTSCO_INPUT_CLASS: 997 di->mixer_class = BTSCO_INPUT_CLASS; 998 di->next = di->prev = AUDIO_MIXER_LAST; 999 strcpy(di->label.name, AudioCinputs); 1000 di->type = AUDIO_MIXER_CLASS; 1001 break; 1002 1003 default: 1004 err = ENXIO; 1005 break; 1006 } 1007 1008 return err; 1009 } 1010 1011 /* 1012 * Allocate Ring Buffers. 1013 */ 1014 static void * 1015 btsco_allocm(void *hdl, int direction, size_t size) 1016 { 1017 struct btsco_softc *sc = hdl; 1018 void *addr; 1019 1020 DPRINTF("%s: size %d direction %d\n", sc->sc_name, size, direction); 1021 1022 addr = kmem_alloc(size, KM_SLEEP); 1023 1024 if (addr != NULL && direction == AUMODE_PLAY) { 1025 sc->sc_tx_buf = addr; 1026 sc->sc_tx_refcnt = 0; 1027 } 1028 1029 return addr; 1030 } 1031 1032 /* 1033 * Free Ring Buffers. 1034 * 1035 * Because we used external memory for the tx mbufs, we dont 1036 * want to free the memory until all the mbufs are done with 1037 * 1038 * Just to be sure, dont free if something is still pending. 1039 * This would be a memory leak but at least there is a warning.. 1040 */ 1041 static void 1042 btsco_freem(void *hdl, void *addr, size_t size) 1043 { 1044 struct btsco_softc *sc = hdl; 1045 int count = hz / 2; 1046 1047 if (addr == sc->sc_tx_buf) { 1048 DPRINTF("%s: tx_refcnt=%d\n", sc->sc_name, sc->sc_tx_refcnt); 1049 1050 sc->sc_tx_buf = NULL; 1051 1052 while (sc->sc_tx_refcnt> 0 && count-- > 0) 1053 kpause("drain", false, 1, NULL); 1054 1055 if (sc->sc_tx_refcnt > 0) { 1056 aprint_error("%s: ring buffer unreleased!\n", sc->sc_name); 1057 return; 1058 } 1059 } 1060 1061 kmem_free(addr, size); 1062 } 1063 1064 static int 1065 btsco_get_props(void *hdl) 1066 { 1067 1068 return AUDIO_PROP_FULLDUPLEX; 1069 } 1070 1071 static void 1072 btsco_get_locks(void *hdl, kmutex_t **intr, kmutex_t **thread) 1073 { 1074 struct btsco_softc *sc = hdl; 1075 1076 *intr = &sc->sc_intr_lock; 1077 *thread = bt_lock; 1078 } 1079 1080 /* 1081 * Handle private ioctl. We pass information out about how to talk 1082 * to the device and mixer. 1083 */ 1084 static int 1085 btsco_dev_ioctl(void *hdl, u_long cmd, void *addr, int flag, 1086 struct lwp *l) 1087 { 1088 struct btsco_softc *sc = hdl; 1089 struct btsco_info *bi = (struct btsco_info *)addr; 1090 int err = 0; 1091 1092 DPRINTF("%s cmd 0x%lx flag %d\n", sc->sc_name, cmd, flag); 1093 1094 switch (cmd) { 1095 case BTSCO_GETINFO: 1096 memset(bi, 0, sizeof(*bi)); 1097 bdaddr_copy(&bi->laddr, &sc->sc_laddr); 1098 bdaddr_copy(&bi->raddr, &sc->sc_raddr); 1099 bi->channel = sc->sc_channel; 1100 bi->vgs = BTSCO_VGS; 1101 bi->vgm = BTSCO_VGM; 1102 break; 1103 1104 default: 1105 err = EPASSTHROUGH; 1106 break; 1107 } 1108 1109 return err; 1110 } 1111 1112 1113 /***************************************************************************** 1114 * 1115 * misc btsco functions 1116 * 1117 */ 1118 1119 /* 1120 * Our transmit interrupt. This is triggered when a new block is to be 1121 * sent. We send mtu sized chunks of the block as mbufs with external 1122 * storage to sco_send() 1123 */ 1124 static void 1125 btsco_intr(void *arg) 1126 { 1127 struct btsco_softc *sc = arg; 1128 struct mbuf *m; 1129 uint8_t *block; 1130 int mlen, size; 1131 1132 DPRINTFN(10, "%s block %p size %d\n", 1133 sc->sc_name, sc->sc_tx_block, sc->sc_tx_size); 1134 1135 if (sc->sc_sco == NULL) 1136 return; /* connection is lost */ 1137 1138 block = sc->sc_tx_block; 1139 size = sc->sc_tx_size; 1140 sc->sc_tx_block = NULL; 1141 sc->sc_tx_size = 0; 1142 1143 mutex_enter(bt_lock); 1144 while (size > 0) { 1145 MGETHDR(m, M_DONTWAIT, MT_DATA); 1146 if (m == NULL) 1147 break; 1148 1149 mlen = MIN(sc->sc_mtu, size); 1150 1151 /* I think M_DEVBUF is true but not relevant */ 1152 MEXTADD(m, block, mlen, M_DEVBUF, btsco_extfree, sc); 1153 if ((m->m_flags & M_EXT) == 0) { 1154 m_free(m); 1155 break; 1156 } 1157 sc->sc_tx_refcnt++; 1158 1159 m->m_pkthdr.len = m->m_len = mlen; 1160 sc->sc_tx_pending++; 1161 1162 if (sco_send(sc->sc_sco, m) > 0) { 1163 sc->sc_tx_pending--; 1164 break; 1165 } 1166 1167 block += mlen; 1168 size -= mlen; 1169 } 1170 mutex_exit(bt_lock); 1171 } 1172 1173 /* 1174 * Release the mbuf, we keep a reference count on the tx buffer so 1175 * that we dont release it before its free. 1176 */ 1177 static void 1178 btsco_extfree(struct mbuf *m, void *addr, size_t size, 1179 void *arg) 1180 { 1181 struct btsco_softc *sc = arg; 1182 1183 if (m != NULL) 1184 pool_cache_put(mb_cache, m); 1185 1186 sc->sc_tx_refcnt--; 1187 } 1188
Indexes created Wed Oct 01 07:09:59 GMT 2025