btsco.c revision 1.35
1 /* $NetBSD: btsco.c,v 1.35 2017/05/28 04:12:13 nat 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 1.35 2017/05/28 04:12:13 nat 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_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_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 pmf_device_register(self, NULL, NULL); 348 } 349 350 static int 351 btsco_detach(device_t self, int flags) 352 { 353 struct btsco_softc *sc = device_private(self); 354 355 DPRINTF("sc=%p\n", sc); 356 357 pmf_device_deregister(self); 358 359 mutex_enter(bt_lock); 360 if (sc->sc_sco != NULL) { 361 DPRINTF("sc_sco=%p\n", sc->sc_sco); 362 sco_disconnect_pcb(sc->sc_sco, 0); 363 sco_detach_pcb(&sc->sc_sco); 364 sc->sc_sco = NULL; 365 } 366 367 if (sc->sc_sco_l != NULL) { 368 DPRINTF("sc_sco_l=%p\n", sc->sc_sco_l); 369 sco_detach_pcb(&sc->sc_sco_l); 370 sc->sc_sco_l = NULL; 371 } 372 mutex_exit(bt_lock); 373 374 if (sc->sc_audio != NULL) { 375 DPRINTF("sc_audio=%p\n", sc->sc_audio); 376 config_detach(sc->sc_audio, flags); 377 sc->sc_audio = NULL; 378 } 379 380 if (sc->sc_intr != NULL) { 381 softint_disestablish(sc->sc_intr); 382 sc->sc_intr = NULL; 383 } 384 385 mutex_enter(bt_lock); 386 if (sc->sc_rx_mbuf != NULL) { 387 m_freem(sc->sc_rx_mbuf); 388 sc->sc_rx_mbuf = NULL; 389 } 390 mutex_exit(bt_lock); 391 392 if (sc->sc_tx_refcnt > 0) { 393 aprint_error_dev(self, "tx_refcnt=%d!\n", sc->sc_tx_refcnt); 394 395 if ((flags & DETACH_FORCE) == 0) 396 return EAGAIN; 397 } 398 399 cv_destroy(&sc->sc_connect); 400 mutex_destroy(&sc->sc_lock); 401 402 return 0; 403 } 404 405 /***************************************************************************** 406 * 407 * bluetooth(9) methods for SCO 408 * 409 * All these are called from Bluetooth Protocol code, in a soft 410 * interrupt context at IPL_SOFTNET. 411 */ 412 413 static void 414 btsco_sco_connecting(void *arg) 415 { 416 /* struct btsco_softc *sc = arg; */ 417 418 /* dont care */ 419 } 420 421 static void 422 btsco_sco_connected(void *arg) 423 { 424 struct btsco_softc *sc = arg; 425 426 DPRINTF("%s\n", sc->sc_name); 427 428 KASSERT(sc->sc_sco != NULL); 429 KASSERT(sc->sc_state == BTSCO_WAIT_CONNECT); 430 431 /* 432 * If we are listening, no more need 433 */ 434 if (sc->sc_sco_l != NULL) 435 sco_detach_pcb(&sc->sc_sco_l); 436 437 sc->sc_state = BTSCO_OPEN; 438 cv_broadcast(&sc->sc_connect); 439 } 440 441 static void 442 btsco_sco_disconnected(void *arg, int err) 443 { 444 struct btsco_softc *sc = arg; 445 446 DPRINTF("%s sc_state %d\n", sc->sc_name, sc->sc_state); 447 448 KASSERT(sc->sc_sco != NULL); 449 450 sc->sc_err = err; 451 sco_detach_pcb(&sc->sc_sco); 452 453 switch (sc->sc_state) { 454 case BTSCO_CLOSED: /* dont think this can happen */ 455 break; 456 457 case BTSCO_WAIT_CONNECT: /* connect failed */ 458 cv_broadcast(&sc->sc_connect); 459 break; 460 461 case BTSCO_OPEN: /* link lost */ 462 /* 463 * If IO is in progress, tell the audio driver that it 464 * has completed so that when it tries to send more, we 465 * can indicate an error. 466 */ 467 mutex_enter(bt_lock); 468 if (sc->sc_tx_pending > 0) { 469 sc->sc_tx_pending = 0; 470 (*sc->sc_tx_intr)(sc->sc_tx_intrarg); 471 } 472 if (sc->sc_rx_want > 0) { 473 sc->sc_rx_want = 0; 474 (*sc->sc_rx_intr)(sc->sc_rx_intrarg); 475 } 476 mutex_exit(bt_lock); 477 break; 478 479 default: 480 UNKNOWN(sc->sc_state); 481 } 482 483 sc->sc_state = BTSCO_CLOSED; 484 } 485 486 static void * 487 btsco_sco_newconn(void *arg, struct sockaddr_bt *laddr, 488 struct sockaddr_bt *raddr) 489 { 490 struct btsco_softc *sc = arg; 491 492 DPRINTF("%s\n", sc->sc_name); 493 494 if (bdaddr_same(&raddr->bt_bdaddr, &sc->sc_raddr) == 0 495 || sc->sc_state != BTSCO_WAIT_CONNECT 496 || sc->sc_sco != NULL) 497 return NULL; 498 499 sco_attach_pcb(&sc->sc_sco, &btsco_sco_proto, sc); 500 return sc->sc_sco; 501 } 502 503 static void 504 btsco_sco_complete(void *arg, int count) 505 { 506 struct btsco_softc *sc = arg; 507 508 DPRINTFN(10, "%s count %d\n", sc->sc_name, count); 509 510 if (sc->sc_tx_pending > 0) { 511 sc->sc_tx_pending -= count; 512 if (sc->sc_tx_pending == 0) 513 (*sc->sc_tx_intr)(sc->sc_tx_intrarg); 514 } 515 } 516 517 static void 518 btsco_sco_linkmode(void *arg, int new) 519 { 520 /* struct btsco_softc *sc = arg; */ 521 522 /* dont care */ 523 } 524 525 static void 526 btsco_sco_input(void *arg, struct mbuf *m) 527 { 528 struct btsco_softc *sc = arg; 529 int len; 530 531 DPRINTFN(10, "%s len=%d\n", sc->sc_name, m->m_pkthdr.len); 532 533 if (sc->sc_rx_want == 0) { 534 m_freem(m); 535 } else { 536 KASSERT(sc->sc_rx_intr != NULL); 537 KASSERT(sc->sc_rx_block != NULL); 538 539 len = MIN(sc->sc_rx_want, m->m_pkthdr.len); 540 m_copydata(m, 0, len, sc->sc_rx_block); 541 542 sc->sc_rx_want -= len; 543 sc->sc_rx_block += len; 544 545 if (len > m->m_pkthdr.len) { 546 if (sc->sc_rx_mbuf != NULL) 547 m_freem(sc->sc_rx_mbuf); 548 549 m_adj(m, len); 550 sc->sc_rx_mbuf = m; 551 } else { 552 m_freem(m); 553 } 554 555 if (sc->sc_rx_want == 0) 556 (*sc->sc_rx_intr)(sc->sc_rx_intrarg); 557 } 558 } 559 560 561 /***************************************************************************** 562 * 563 * audio(9) methods 564 * 565 */ 566 567 static int 568 btsco_open(void *hdl, int flags) 569 { 570 struct sockaddr_bt sa; 571 struct btsco_softc *sc = hdl; 572 struct sockopt sopt; 573 int err, timo; 574 575 DPRINTF("%s flags 0x%x\n", sc->sc_name, flags); 576 /* flags FREAD & FWRITE? */ 577 578 if (sc->sc_sco != NULL || sc->sc_sco_l != NULL) 579 return EIO; 580 581 KASSERT(mutex_owned(bt_lock)); 582 583 memset(&sa, 0, sizeof(sa)); 584 sa.bt_len = sizeof(sa); 585 sa.bt_family = AF_BLUETOOTH; 586 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr); 587 588 if (sc->sc_flags & BTSCO_LISTEN) { 589 err = sco_attach_pcb(&sc->sc_sco_l, &btsco_sco_proto, sc); 590 if (err) 591 goto done; 592 593 err = sco_bind_pcb(sc->sc_sco_l, &sa); 594 if (err) { 595 sco_detach_pcb(&sc->sc_sco_l); 596 goto done; 597 } 598 599 err = sco_listen_pcb(sc->sc_sco_l); 600 if (err) { 601 sco_detach_pcb(&sc->sc_sco_l); 602 goto done; 603 } 604 605 timo = 0; /* no timeout */ 606 } else { 607 err = sco_attach_pcb(&sc->sc_sco, &btsco_sco_proto, sc); 608 if (err) 609 goto done; 610 611 err = sco_bind_pcb(sc->sc_sco, &sa); 612 if (err) { 613 sco_detach_pcb(&sc->sc_sco); 614 goto done; 615 } 616 617 bdaddr_copy(&sa.bt_bdaddr, &sc->sc_raddr); 618 err = sco_connect_pcb(sc->sc_sco, &sa); 619 if (err) { 620 sco_detach_pcb(&sc->sc_sco); 621 goto done; 622 } 623 624 timo = BTSCO_TIMEOUT; 625 } 626 627 sc->sc_state = BTSCO_WAIT_CONNECT; 628 while (err == 0 && sc->sc_state == BTSCO_WAIT_CONNECT) 629 err = cv_timedwait_sig(&sc->sc_connect, bt_lock, timo); 630 631 switch (sc->sc_state) { 632 case BTSCO_CLOSED: /* disconnected */ 633 err = sc->sc_err; 634 635 /* fall through to */ 636 case BTSCO_WAIT_CONNECT: /* error */ 637 if (sc->sc_sco != NULL) 638 sco_detach_pcb(&sc->sc_sco); 639 640 if (sc->sc_sco_l != NULL) 641 sco_detach_pcb(&sc->sc_sco_l); 642 643 break; 644 645 case BTSCO_OPEN: /* hurrah */ 646 sockopt_init(&sopt, BTPROTO_SCO, SO_SCO_MTU, 0); 647 (void)sco_getopt(sc->sc_sco, &sopt); 648 (void)sockopt_get(&sopt, &sc->sc_mtu, sizeof(sc->sc_mtu)); 649 sockopt_destroy(&sopt); 650 break; 651 652 default: 653 UNKNOWN(sc->sc_state); 654 break; 655 } 656 657 done: 658 DPRINTF("done err=%d, sc_state=%d, sc_mtu=%d\n", 659 err, sc->sc_state, sc->sc_mtu); 660 return err; 661 } 662 663 static void 664 btsco_close(void *hdl) 665 { 666 struct btsco_softc *sc = hdl; 667 668 DPRINTF("%s\n", sc->sc_name); 669 670 KASSERT(mutex_owned(bt_lock)); 671 672 if (sc->sc_sco != NULL) { 673 sco_disconnect_pcb(sc->sc_sco, 0); 674 sco_detach_pcb(&sc->sc_sco); 675 } 676 677 if (sc->sc_sco_l != NULL) { 678 sco_detach_pcb(&sc->sc_sco_l); 679 } 680 681 if (sc->sc_rx_mbuf != NULL) { 682 m_freem(sc->sc_rx_mbuf); 683 sc->sc_rx_mbuf = NULL; 684 } 685 686 sc->sc_rx_want = 0; 687 sc->sc_rx_block = NULL; 688 sc->sc_rx_intr = NULL; 689 sc->sc_rx_intrarg = NULL; 690 691 sc->sc_tx_size = 0; 692 sc->sc_tx_block = NULL; 693 sc->sc_tx_pending = 0; 694 sc->sc_tx_intr = NULL; 695 sc->sc_tx_intrarg = NULL; 696 } 697 698 static int 699 btsco_query_encoding(void *hdl, struct audio_encoding *ae) 700 { 701 /* struct btsco_softc *sc = hdl; */ 702 int err = 0; 703 704 switch (ae->index) { 705 case 0: 706 strcpy(ae->name, AudioEslinear_le); 707 ae->encoding = AUDIO_ENCODING_SLINEAR_LE; 708 ae->precision = 16; 709 ae->flags = 0; 710 break; 711 712 default: 713 err = EINVAL; 714 } 715 716 return err; 717 } 718 719 static int 720 btsco_set_params(void *hdl, int setmode, int usemode, 721 audio_params_t *play, audio_params_t *rec, 722 stream_filter_list_t *pfil, stream_filter_list_t *rfil) 723 { 724 /* struct btsco_softc *sc = hdl; */ 725 const struct audio_format *f; 726 int rv; 727 728 DPRINTF("setmode 0x%x usemode 0x%x\n", setmode, usemode); 729 DPRINTF("rate %d, precision %d, channels %d encoding %d\n", 730 play->sample_rate, play->precision, play->channels, play->encoding); 731 732 /* 733 * If we had a list of formats, we could check the HCI_Voice_Setting 734 * and select the appropriate one to use. Currently only one is 735 * supported: 0x0060 == 8000Hz, mono, 16-bit, slinear_le 736 */ 737 f = &btsco_format; 738 739 if (setmode & AUMODE_PLAY) { 740 rv = auconv_set_converter(f, 1, AUMODE_PLAY, play, TRUE, pfil); 741 if (rv < 0) 742 return EINVAL; 743 } 744 745 if (setmode & AUMODE_RECORD) { 746 rv = auconv_set_converter(f, 1, AUMODE_RECORD, rec, TRUE, rfil); 747 if (rv < 0) 748 return EINVAL; 749 } 750 751 return 0; 752 } 753 754 /* 755 * If we have an MTU value to use, round the blocksize to that. 756 */ 757 static int 758 btsco_round_blocksize(void *hdl, int bs, int mode, 759 const audio_params_t *param) 760 { 761 struct btsco_softc *sc = hdl; 762 763 if (sc->sc_mtu > 0) { 764 bs = (bs / sc->sc_mtu) * sc->sc_mtu; 765 if (bs == 0) 766 bs = sc->sc_mtu; 767 } 768 769 DPRINTF("%s mode=0x%x, bs=%d, sc_mtu=%d\n", 770 sc->sc_name, mode, bs, sc->sc_mtu); 771 772 return bs; 773 } 774 775 /* 776 * Start Output 777 * 778 * We dont want to be calling the network stack with bt_lock held 779 * so make a note of what is to be sent, and schedule an interrupt to 780 * bundle it up and queue it. 781 */ 782 static int 783 btsco_start_output(void *hdl, void *block, int blksize, 784 void (*intr)(void *), void *intrarg) 785 { 786 struct btsco_softc *sc = hdl; 787 788 DPRINTFN(5, "%s blksize %d\n", sc->sc_name, blksize); 789 790 if (sc->sc_sco == NULL) 791 return ENOTCONN; /* connection lost */ 792 793 sc->sc_tx_block = block; 794 sc->sc_tx_pending = 0; 795 sc->sc_tx_size = blksize; 796 sc->sc_tx_intr = intr; 797 sc->sc_tx_intrarg = intrarg; 798 799 kpreempt_disable(); 800 softint_schedule(sc->sc_intr); 801 kpreempt_enable(); 802 return 0; 803 } 804 805 /* 806 * Start Input 807 * 808 * When the SCO link is up, we are getting data in any case, so all we do 809 * is note what we want and where to put it and let the sco_input routine 810 * fill in the data. 811 * 812 * If there was any leftover data that didnt fit in the last block, retry 813 * it now. 814 */ 815 static int 816 btsco_start_input(void *hdl, void *block, int blksize, 817 void (*intr)(void *), void *intrarg) 818 { 819 struct btsco_softc *sc = hdl; 820 struct mbuf *m; 821 822 DPRINTFN(5, "%s blksize %d\n", sc->sc_name, blksize); 823 824 if (sc->sc_sco == NULL) 825 return ENOTCONN; 826 827 sc->sc_rx_want = blksize; 828 sc->sc_rx_block = block; 829 sc->sc_rx_intr = intr; 830 sc->sc_rx_intrarg = intrarg; 831 832 if (sc->sc_rx_mbuf != NULL) { 833 m = sc->sc_rx_mbuf; 834 sc->sc_rx_mbuf = NULL; 835 btsco_sco_input(sc, m); 836 } 837 838 return 0; 839 } 840 841 /* 842 * Halt Output 843 * 844 * This doesnt really halt the output, but it will look 845 * that way to the audio driver. The current block will 846 * still be transmitted. 847 */ 848 static int 849 btsco_halt_output(void *hdl) 850 { 851 struct btsco_softc *sc = hdl; 852 853 DPRINTFN(5, "%s\n", sc->sc_name); 854 855 sc->sc_tx_size = 0; 856 sc->sc_tx_block = NULL; 857 sc->sc_tx_pending = 0; 858 sc->sc_tx_intr = NULL; 859 sc->sc_tx_intrarg = NULL; 860 861 return 0; 862 } 863 864 /* 865 * Halt Input 866 * 867 * This doesnt really halt the input, but it will look 868 * that way to the audio driver. Incoming data will be 869 * discarded. 870 */ 871 static int 872 btsco_halt_input(void *hdl) 873 { 874 struct btsco_softc *sc = hdl; 875 876 DPRINTFN(5, "%s\n", sc->sc_name); 877 878 sc->sc_rx_want = 0; 879 sc->sc_rx_block = NULL; 880 sc->sc_rx_intr = NULL; 881 sc->sc_rx_intrarg = NULL; 882 883 if (sc->sc_rx_mbuf != NULL) { 884 m_freem(sc->sc_rx_mbuf); 885 sc->sc_rx_mbuf = NULL; 886 } 887 888 return 0; 889 } 890 891 static int 892 btsco_getdev(void *hdl, struct audio_device *ret) 893 { 894 895 *ret = btsco_device; 896 return 0; 897 } 898 899 static int 900 btsco_setfd(void *hdl, int fd) 901 { 902 DPRINTF("set %s duplex\n", fd ? "full" : "half"); 903 904 return 0; 905 } 906 907 static int 908 btsco_set_port(void *hdl, mixer_ctrl_t *mc) 909 { 910 struct btsco_softc *sc = hdl; 911 int err = 0; 912 913 DPRINTF("%s dev %d type %d\n", sc->sc_name, mc->dev, mc->type); 914 915 switch (mc->dev) { 916 case BTSCO_VGS: 917 if (mc->type != AUDIO_MIXER_VALUE || 918 mc->un.value.num_channels != 1) { 919 err = EINVAL; 920 break; 921 } 922 923 sc->sc_vgs = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 924 break; 925 926 case BTSCO_VGM: 927 if (mc->type != AUDIO_MIXER_VALUE || 928 mc->un.value.num_channels != 1) { 929 err = EINVAL; 930 break; 931 } 932 933 sc->sc_vgm = mc->un.value.level[AUDIO_MIXER_LEVEL_MONO]; 934 break; 935 936 default: 937 err = EINVAL; 938 break; 939 } 940 941 return err; 942 } 943 944 static int 945 btsco_get_port(void *hdl, mixer_ctrl_t *mc) 946 { 947 struct btsco_softc *sc = hdl; 948 int err = 0; 949 950 DPRINTF("%s dev %d\n", sc->sc_name, mc->dev); 951 952 switch (mc->dev) { 953 case BTSCO_VGS: 954 mc->type = AUDIO_MIXER_VALUE; 955 mc->un.value.num_channels = 1; 956 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_vgs; 957 break; 958 959 case BTSCO_VGM: 960 mc->type = AUDIO_MIXER_VALUE; 961 mc->un.value.num_channels = 1; 962 mc->un.value.level[AUDIO_MIXER_LEVEL_MONO] = sc->sc_vgm; 963 break; 964 965 default: 966 err = EINVAL; 967 break; 968 } 969 970 return err; 971 } 972 973 static int 974 btsco_query_devinfo(void *hdl, mixer_devinfo_t *di) 975 { 976 /* struct btsco_softc *sc = hdl; */ 977 int err = 0; 978 979 switch(di->index) { 980 case BTSCO_VGS: 981 di->mixer_class = BTSCO_INPUT_CLASS; 982 di->next = di->prev = AUDIO_MIXER_LAST; 983 strcpy(di->label.name, AudioNspeaker); 984 di->type = AUDIO_MIXER_VALUE; 985 strcpy(di->un.v.units.name, AudioNvolume); 986 di->un.v.num_channels = 1; 987 di->un.v.delta = BTSCO_DELTA; 988 break; 989 990 case BTSCO_VGM: 991 di->mixer_class = BTSCO_INPUT_CLASS; 992 di->next = di->prev = AUDIO_MIXER_LAST; 993 strcpy(di->label.name, AudioNmicrophone); 994 di->type = AUDIO_MIXER_VALUE; 995 strcpy(di->un.v.units.name, AudioNvolume); 996 di->un.v.num_channels = 1; 997 di->un.v.delta = BTSCO_DELTA; 998 break; 999 1000 case BTSCO_INPUT_CLASS: 1001 di->mixer_class = BTSCO_INPUT_CLASS; 1002 di->next = di->prev = AUDIO_MIXER_LAST; 1003 strcpy(di->label.name, AudioCinputs); 1004 di->type = AUDIO_MIXER_CLASS; 1005 break; 1006 1007 default: 1008 err = ENXIO; 1009 break; 1010 } 1011 1012 return err; 1013 } 1014 1015 /* 1016 * Allocate Ring Buffers. 1017 */ 1018 static void * 1019 btsco_allocm(void *hdl, int direction, size_t size) 1020 { 1021 struct btsco_softc *sc = hdl; 1022 void *addr; 1023 1024 DPRINTF("%s: size %d direction %d\n", sc->sc_name, size, direction); 1025 1026 addr = kmem_alloc(size, KM_SLEEP); 1027 1028 if (addr != NULL && direction == AUMODE_PLAY) { 1029 sc->sc_tx_buf = addr; 1030 sc->sc_tx_refcnt = 0; 1031 } 1032 1033 return addr; 1034 } 1035 1036 /* 1037 * Free Ring Buffers. 1038 * 1039 * Because we used external memory for the tx mbufs, we dont 1040 * want to free the memory until all the mbufs are done with 1041 * 1042 * Just to be sure, dont free if something is still pending. 1043 * This would be a memory leak but at least there is a warning.. 1044 */ 1045 static void 1046 btsco_freem(void *hdl, void *addr, size_t size) 1047 { 1048 struct btsco_softc *sc = hdl; 1049 int count = hz / 2; 1050 1051 if (addr == sc->sc_tx_buf) { 1052 DPRINTF("%s: tx_refcnt=%d\n", sc->sc_name, sc->sc_tx_refcnt); 1053 1054 sc->sc_tx_buf = NULL; 1055 1056 while (sc->sc_tx_refcnt> 0 && count-- > 0) 1057 kpause("drain", false, 1, NULL); 1058 1059 if (sc->sc_tx_refcnt > 0) { 1060 aprint_error("%s: ring buffer unreleased!\n", sc->sc_name); 1061 return; 1062 } 1063 } 1064 1065 kmem_free(addr, size); 1066 } 1067 1068 static int 1069 btsco_get_props(void *hdl) 1070 { 1071 1072 return AUDIO_PROP_FULLDUPLEX; 1073 } 1074 1075 static void 1076 btsco_get_locks(void *hdl, kmutex_t **intr, kmutex_t **thread) 1077 { 1078 struct btsco_softc *sc = hdl; 1079 1080 *thread = &sc->sc_lock; 1081 *intr = bt_lock; 1082 } 1083 1084 /* 1085 * Handle private ioctl. We pass information out about how to talk 1086 * to the device and mixer. 1087 */ 1088 static int 1089 btsco_dev_ioctl(void *hdl, u_long cmd, void *addr, int flag, 1090 struct lwp *l) 1091 { 1092 struct btsco_softc *sc = hdl; 1093 struct btsco_info *bi = (struct btsco_info *)addr; 1094 int err = 0; 1095 1096 DPRINTF("%s cmd 0x%lx flag %d\n", sc->sc_name, cmd, flag); 1097 1098 switch (cmd) { 1099 case BTSCO_GETINFO: 1100 memset(bi, 0, sizeof(*bi)); 1101 bdaddr_copy(&bi->laddr, &sc->sc_laddr); 1102 bdaddr_copy(&bi->raddr, &sc->sc_raddr); 1103 bi->channel = sc->sc_channel; 1104 bi->vgs = BTSCO_VGS; 1105 bi->vgm = BTSCO_VGM; 1106 break; 1107 1108 default: 1109 err = EPASSTHROUGH; 1110 break; 1111 } 1112 1113 return err; 1114 } 1115 1116 1117 /***************************************************************************** 1118 * 1119 * misc btsco functions 1120 * 1121 */ 1122 1123 /* 1124 * Our transmit interrupt. This is triggered when a new block is to be 1125 * sent. We send mtu sized chunks of the block as mbufs with external 1126 * storage to sco_send_pcb() 1127 */ 1128 static void 1129 btsco_intr(void *arg) 1130 { 1131 struct btsco_softc *sc = arg; 1132 struct mbuf *m; 1133 uint8_t *block; 1134 int mlen, size; 1135 1136 DPRINTFN(10, "%s block %p size %d\n", 1137 sc->sc_name, sc->sc_tx_block, sc->sc_tx_size); 1138 1139 if (sc->sc_sco == NULL) 1140 return; /* connection is lost */ 1141 1142 mutex_enter(bt_lock); 1143 block = sc->sc_tx_block; 1144 size = sc->sc_tx_size; 1145 sc->sc_tx_block = NULL; 1146 sc->sc_tx_size = 0; 1147 1148 while (size > 0) { 1149 MGETHDR(m, M_DONTWAIT, MT_DATA); 1150 if (m == NULL) 1151 break; 1152 1153 mlen = MIN(sc->sc_mtu, size); 1154 1155 /* I think M_DEVBUF is true but not relevant */ 1156 MEXTADD(m, block, mlen, M_DEVBUF, btsco_extfree, sc); 1157 if ((m->m_flags & M_EXT) == 0) { 1158 m_free(m); 1159 break; 1160 } 1161 sc->sc_tx_refcnt++; 1162 1163 m->m_pkthdr.len = m->m_len = mlen; 1164 sc->sc_tx_pending++; 1165 1166 if (sco_send_pcb(sc->sc_sco, m) > 0) { 1167 sc->sc_tx_pending--; 1168 break; 1169 } 1170 1171 block += mlen; 1172 size -= mlen; 1173 } 1174 mutex_exit(bt_lock); 1175 } 1176 1177 /* 1178 * Release the mbuf, we keep a reference count on the tx buffer so 1179 * that we dont release it before its free. 1180 */ 1181 static void 1182 btsco_extfree(struct mbuf *m, void *addr, size_t size, 1183 void *arg) 1184 { 1185 struct btsco_softc *sc = arg; 1186 1187 if (m != NULL) 1188 pool_cache_put(mb_cache, m); 1189 1190 sc->sc_tx_refcnt--; 1191 } 1192
Indexes created Wed Oct 01 19:09:53 GMT 2025