xref: /netbsd-src/sys/arch/arm/broadcom/bcm2835_vcaudio.c (revision bdc22b2e01993381dcefeff2bc9b56ca75a4235c)
1 /* $NetBSD: bcm2835_vcaudio.c,v 1.11 2016/10/14 20:29:45 nat Exp $ */
2 
3 /*-
4  * Copyright (c) 2013 Jared D. McNeill <jmcneill@invisible.ca>
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26  * POSSIBILITY OF SUCH DAMAGE.
27  */
28 
29 /*
30  * VideoCore audio interface
31  */
32 
33 #include <sys/cdefs.h>
34 __KERNEL_RCSID(0, "$NetBSD: bcm2835_vcaudio.c,v 1.11 2016/10/14 20:29:45 nat Exp $");
35 
36 #include <sys/param.h>
37 #include <sys/types.h>
38 #include <sys/systm.h>
39 #include <sys/device.h>
40 #include <sys/conf.h>
41 #include <sys/bus.h>
42 #include <sys/kmem.h>
43 
44 #include <sys/audioio.h>
45 #include <dev/audio_if.h>
46 #include <dev/auconv.h>
47 #include <dev/auvolconv.h>
48 
49 #include <interface/compat/vchi_bsd.h>
50 #include <interface/vchiq_arm/vchiq_netbsd.h>
51 #include <interface/vchi/vchi.h>
52 
53 #include "bcm2835_vcaudioreg.h"
54 
55 /* levels with 5% volume step */
56 static int vcaudio_levels[] = {
57 	-10239, -4605, -3794, -3218, -2772,
58 	-2407, -2099, -1832, -1597, -1386,
59 	-1195, -1021, -861, -713, -575,
60 	-446, -325, -210, -102, 0,
61 };
62 
63 #define vol2db(vol)	vcaudio_levels[((vol) * 20) >> 8]
64 #define vol2vc(vol)	((uint32_t)(-(vol2db((vol)) << 8) / 100))
65 
66 enum {
67 	VCAUDIO_OUTPUT_CLASS,
68 	VCAUDIO_INPUT_CLASS,
69 	VCAUDIO_OUTPUT_MASTER_VOLUME,
70 	VCAUDIO_INPUT_DAC_VOLUME,
71 	VCAUDIO_OUTPUT_AUTO_VOLUME,
72 	VCAUDIO_OUTPUT_HEADPHONE_VOLUME,
73 	VCAUDIO_OUTPUT_HDMI_VOLUME,
74 	VCAUDIO_OUTPUT_SELECT,
75 	VCAUDIO_ENUM_LAST,
76 };
77 
78 enum vcaudio_dest {
79 	VCAUDIO_DEST_AUTO = 0,
80 	VCAUDIO_DEST_HP = 1,
81 	VCAUDIO_DEST_HDMI = 2,
82 };
83 
84 /*
85  * Maximum message size is 4000 bytes and VCHIQ can accept 16 messages.
86  *
87  * 4000 bytes of 16bit 48kHz stereo is approximately 21ms.
88  *
89  * We get complete messages at ~10ms intervals.
90  *
91  * Setting blocksize to 4 x 1600 means that we send approx 33ms of audio. We
92  * prefill by two blocks before starting audio meaning we have 50ms of latency.
93  *
94  * Six messages of 1600 bytes was chosen working back from a desired latency of
95  * 50ms.
96  */
97 
98 #define VCAUDIO_MSGSIZE		1600
99 #define VCAUDIO_NUMMSGS		4
100 #define VCAUDIO_BLOCKSIZE	(VCAUDIO_MSGSIZE * VCAUDIO_NUMMSGS)
101 #define VCAUDIO_BUFFERSIZE	128000
102 #define VCAUDIO_PREFILLCOUNT	2
103 
104 struct vcaudio_softc {
105 	device_t			sc_dev;
106 	device_t			sc_audiodev;
107 
108 	lwp_t				*sc_lwp;
109 
110 	kmutex_t			sc_lock;
111 	kmutex_t			sc_intr_lock;
112 	kcondvar_t			sc_datacv;
113 
114 	kmutex_t			sc_msglock;
115 	kcondvar_t			sc_msgcv;
116 
117 	struct audio_format		sc_format;
118 	struct audio_encoding_set	*sc_encodings;
119 
120 	void				(*sc_pint)(void *);
121 	void				*sc_pintarg;
122 	audio_params_t			sc_pparam;
123 	bool				sc_started;
124 	int				sc_pblkcnt;	// prefill block count
125 	int				sc_abytes;	// available bytes
126 	int				sc_pbytes;	// played bytes
127 	off_t				sc_ppos;
128 	void				*sc_pstart;
129 	void				*sc_pend;
130 	int				sc_pblksize;
131 
132 	bool				sc_msgdone;
133 	int				sc_success;
134 
135 	VCHI_INSTANCE_T			sc_instance;
136 	VCHI_CONNECTION_T		sc_connection;
137 	VCHI_SERVICE_HANDLE_T		sc_service;
138 
139 	short				sc_peer_version;
140 
141 	int				sc_hwvol[3];
142 	enum vcaudio_dest		sc_dest;
143 
144 	uint8_t				sc_swvol;
145 };
146 
147 static int	vcaudio_match(device_t, cfdata_t, void *);
148 static void	vcaudio_attach(device_t, device_t, void *);
149 static int	vcaudio_rescan(device_t, const char *, const int *);
150 static void	vcaudio_childdet(device_t, device_t);
151 
152 static int	vcaudio_init(struct vcaudio_softc *);
153 static void	vcaudio_service_callback(void *,
154     const VCHI_CALLBACK_REASON_T, void *);
155 static int	vcaudio_msg_sync(struct vcaudio_softc *, VC_AUDIO_MSG_T *,
156     size_t);
157 static void	vcaudio_worker(void *);
158 
159 static int	vcaudio_open(void *, int);
160 static void	vcaudio_close(void *);
161 static int	vcaudio_query_encoding(void *, struct audio_encoding *);
162 static int	vcaudio_set_params(void *, int, int,
163     audio_params_t *, audio_params_t *,
164     stream_filter_list_t *, stream_filter_list_t *);
165 static int	vcaudio_halt_output(void *);
166 static int	vcaudio_halt_input(void *);
167 static int	vcaudio_set_port(void *, mixer_ctrl_t *);
168 static int	vcaudio_get_port(void *, mixer_ctrl_t *);
169 static int	vcaudio_query_devinfo(void *, mixer_devinfo_t *);
170 static int	vcaudio_getdev(void *, struct audio_device *);
171 static int	vcaudio_get_props(void *);
172 
173 static int	vcaudio_round_blocksize(void *, int, int,
174     const audio_params_t *);
175 static size_t	vcaudio_round_buffersize(void *, int, size_t);
176 
177 static int	vcaudio_trigger_output(void *, void *, void *, int,
178     void (*)(void *), void *, const audio_params_t *);
179 static int	vcaudio_trigger_input(void *, void *, void *, int,
180     void (*)(void *), void *, const audio_params_t *);
181 
182 static void	vcaudio_get_locks(void *, kmutex_t **, kmutex_t **);
183 
184 static stream_filter_t *vcaudio_swvol_filter(struct audio_softc *,
185     const audio_params_t *, const audio_params_t *);
186 static void	vcaudio_swvol_dtor(stream_filter_t *);
187 
188 static const struct audio_hw_if vcaudio_hw_if = {
189 	.open = vcaudio_open,
190 	.close = vcaudio_close,
191 	.query_encoding = vcaudio_query_encoding,
192 	.set_params = vcaudio_set_params,
193 	.halt_output = vcaudio_halt_output,
194 	.halt_input = vcaudio_halt_input,
195 	.getdev = vcaudio_getdev,
196 	.set_port = vcaudio_set_port,
197 	.get_port = vcaudio_get_port,
198 	.query_devinfo = vcaudio_query_devinfo,
199 	.get_props = vcaudio_get_props,
200 	.round_blocksize = vcaudio_round_blocksize,
201 	.round_buffersize = vcaudio_round_buffersize,
202 	.trigger_output = vcaudio_trigger_output,
203 	.trigger_input = vcaudio_trigger_input,
204 	.get_locks = vcaudio_get_locks,
205 };
206 
207 CFATTACH_DECL2_NEW(vcaudio, sizeof(struct vcaudio_softc),
208     vcaudio_match, vcaudio_attach, NULL, NULL, vcaudio_rescan,
209     vcaudio_childdet);
210 
211 static int
212 vcaudio_match(device_t parent, cfdata_t match, void *aux)
213 {
214 	struct vchiq_attach_args *vaa = aux;
215 
216 	return !strcmp(vaa->vaa_name, "AUDS");
217 }
218 
219 static void
220 vcaudio_attach(device_t parent, device_t self, void *aux)
221 {
222 	struct vcaudio_softc *sc = device_private(self);
223 	int error;
224 
225 	sc->sc_dev = self;
226 	mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE);
227 	mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_NONE);
228 	mutex_init(&sc->sc_msglock, MUTEX_DEFAULT, IPL_NONE);
229 	cv_init(&sc->sc_msgcv, "msg");
230 	cv_init(&sc->sc_datacv, "data");
231 	sc->sc_success = -1;
232 
233 	error = kthread_create(PRI_BIO, KTHREAD_MPSAFE, NULL, vcaudio_worker,
234 	    sc, &sc->sc_lwp, "vcaudio");
235 	if (error) {
236 		aprint_error(": couldn't create thread (%d)\n", error);
237 		return;
238 	}
239 
240 	aprint_naive("\n");
241 	aprint_normal(": auds\n");
242 
243 	error = vcaudio_rescan(self, NULL, NULL);
244 	if (error)
245 		aprint_error_dev(self, "not configured\n");
246 
247 }
248 
249 static int
250 vcaudio_rescan(device_t self, const char *ifattr, const int *locs)
251 {
252 	struct vcaudio_softc *sc = device_private(self);
253 	int error;
254 
255 	if (ifattr_match(ifattr, "audiobus") && sc->sc_audiodev == NULL) {
256 		error = vcaudio_init(sc);
257 		if (error) {
258 			return error;
259 		}
260 
261 		sc->sc_audiodev = audio_attach_mi(&vcaudio_hw_if,
262 		    sc, sc->sc_dev);
263 	}
264 	return 0;
265 }
266 
267 static void
268 vcaudio_childdet(device_t self, device_t child)
269 {
270 	struct vcaudio_softc *sc = device_private(self);
271 
272 	if (sc->sc_audiodev == child)
273 		sc->sc_audiodev = NULL;
274 }
275 
276 static int
277 vcaudio_init(struct vcaudio_softc *sc)
278 {
279 	VC_AUDIO_MSG_T msg;
280 	int error;
281 
282 	sc->sc_swvol = 255;
283 	sc->sc_hwvol[VCAUDIO_DEST_AUTO] = 255;
284 	sc->sc_hwvol[VCAUDIO_DEST_HP] = 255;
285 	sc->sc_hwvol[VCAUDIO_DEST_HDMI] = 255;
286 	sc->sc_dest = VCAUDIO_DEST_AUTO;
287 
288 	sc->sc_format.mode = AUMODE_PLAY|AUMODE_RECORD;
289 	sc->sc_format.encoding = AUDIO_ENCODING_SLINEAR_LE;
290 	sc->sc_format.validbits = 16;
291 	sc->sc_format.precision = 16;
292 	sc->sc_format.channels = 2;
293 	sc->sc_format.channel_mask = AUFMT_STEREO;
294 	sc->sc_format.frequency_type = 0;
295 	sc->sc_format.frequency[0] = 48000;
296 	sc->sc_format.frequency[1] = 48000;
297 
298 	error = auconv_create_encodings(&sc->sc_format, 1, &sc->sc_encodings);
299 	if (error) {
300 		aprint_error_dev(sc->sc_dev,
301 		    "couldn't create encodings (error=%d)\n", error);
302 		return error;
303 	}
304 
305 	error = vchi_initialise(&sc->sc_instance);
306 	if (error) {
307 		aprint_error_dev(sc->sc_dev,
308 		    "couldn't init vchi instance (%d)\n", error);
309 		return EIO;
310 	}
311 
312 	error = vchi_connect(NULL, 0, sc->sc_instance);
313 	if (error) {
314 		aprint_error_dev(sc->sc_dev,
315 		    "couldn't connect vchi (%d)\n", error);
316 		return EIO;
317 	}
318 
319 	SERVICE_CREATION_T setup = {
320 		.version = VCHI_VERSION(VC_AUDIOSERV_VER),
321 		.service_id = VC_AUDIO_SERVER_NAME,
322 		.connection = &sc->sc_connection,
323 		.rx_fifo_size = 0,
324 		.tx_fifo_size = 0,
325 		.callback = vcaudio_service_callback,
326 		.callback_param = sc,
327 		.want_unaligned_bulk_rx = 1,
328 		.want_unaligned_bulk_tx = 1,
329 		.want_crc = 0,
330 	};
331 
332 	error = vchi_service_open(sc->sc_instance, &setup, &sc->sc_service);
333 	if (error) {
334 		aprint_error_dev(sc->sc_dev, "couldn't open service (%d)\n",
335 		    error);
336 		return EIO;
337 	}
338 
339 	vchi_get_peer_version(sc->sc_service, &sc->sc_peer_version);
340 
341 	if (sc->sc_peer_version < 2) {
342 		aprint_error_dev(sc->sc_dev,
343 		    "peer version (%d) is less than the required version (2)\n",
344 		    sc->sc_peer_version);
345 		return EINVAL;
346 	}
347 
348 	memset(&msg, 0, sizeof(msg));
349 	msg.type = VC_AUDIO_MSG_TYPE_OPEN;
350 	error = vchi_msg_queue(sc->sc_service, &msg, sizeof(msg),
351 	    VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL);
352 	if (error) {
353 		aprint_error_dev(sc->sc_dev,
354 		    "couldn't send OPEN message (%d)\n", error);
355 	}
356 
357 	memset(&msg, 0, sizeof(msg));
358 	msg.type = VC_AUDIO_MSG_TYPE_CONFIG;
359 	msg.u.config.channels = 2;
360 	msg.u.config.samplerate = 48000;
361 	msg.u.config.bps = 16;
362 	error = vcaudio_msg_sync(sc, &msg, sizeof(msg));
363 	if (error) {
364 		aprint_error_dev(sc->sc_dev,
365 		    "couldn't send CONFIG message (%d)\n", error);
366 	}
367 
368 	memset(&msg, 0, sizeof(msg));
369 	msg.type = VC_AUDIO_MSG_TYPE_CONTROL;
370 	msg.u.control.volume = vol2vc(sc->sc_hwvol[sc->sc_dest]);
371 	msg.u.control.dest = sc->sc_dest;
372 	error = vcaudio_msg_sync(sc, &msg, sizeof(msg));
373 	if (error) {
374 		aprint_error_dev(sc->sc_dev,
375 		    "couldn't send CONTROL message (%d)\n", error);
376 	}
377 
378 	vchi_service_release(sc->sc_service);
379 
380 	return 0;
381 }
382 
383 static void
384 vcaudio_service_callback(void *priv, const VCHI_CALLBACK_REASON_T reason,
385     void *msg_handle)
386 {
387 	struct vcaudio_softc *sc = priv;
388 	VC_AUDIO_MSG_T msg;
389 	int32_t msglen = 0;
390 	int error;
391 	void (*intr)(void *) = NULL;
392 	void *intrarg = NULL;
393 
394 	if (sc == NULL || reason != VCHI_CALLBACK_MSG_AVAILABLE)
395 		return;
396 
397 	memset(&msg, 0, sizeof(msg));
398 	error = vchi_msg_dequeue(sc->sc_service, &msg, sizeof(msg), &msglen,
399 	    VCHI_FLAGS_NONE);
400 	if (error) {
401 		device_printf(sc->sc_dev, "couldn't dequeue msg (%d)\n",
402 		    error);
403 		return;
404 	}
405 
406 	switch (msg.type) {
407 	case VC_AUDIO_MSG_TYPE_RESULT:
408 		mutex_enter(&sc->sc_msglock);
409 		sc->sc_success = msg.u.result.success;
410 		sc->sc_msgdone = true;
411 		cv_broadcast(&sc->sc_msgcv);
412 		mutex_exit(&sc->sc_msglock);
413 		break;
414 
415 	case VC_AUDIO_MSG_TYPE_COMPLETE:
416 		intr = msg.u.complete.callback;
417 		intrarg = msg.u.complete.cookie;
418 		if (intr && intrarg) {
419 			int count = msg.u.complete.count & 0xffff;
420 			int perr = (msg.u.complete.count & __BIT(30)) != 0;
421 			bool sched = false;
422 
423 			mutex_enter(&sc->sc_intr_lock);
424 
425 			if (count > 0) {
426 				sc->sc_pbytes += count;
427 			}
428 			if (perr && sc->sc_started) {
429 #ifdef VCAUDIO_DEBUG
430 				device_printf(sc->sc_dev, "underrun\n");
431 #endif
432 				sched = true;
433 			}
434 			if (sc->sc_pbytes >= sc->sc_pblksize) {
435 				sc->sc_pbytes -= sc->sc_pblksize;
436 				sched = true;
437 			}
438 
439 			if (sched && sc->sc_pint) {
440 				intr(intrarg);
441 				sc->sc_abytes += sc->sc_pblksize;
442 				cv_signal(&sc->sc_datacv);
443 			}
444 			mutex_exit(&sc->sc_intr_lock);
445 		}
446 		break;
447 	default:
448 		break;
449 	}
450 }
451 
452 static void
453 vcaudio_worker(void *priv)
454 {
455 	struct vcaudio_softc *sc = priv;
456 	VC_AUDIO_MSG_T msg;
457 	void (*intr)(void *);
458 	void *intrarg;
459 	void *block;
460 	int error, resid, off, nb, count;
461 
462 	mutex_enter(&sc->sc_intr_lock);
463 
464 	while (true) {
465 		intr = sc->sc_pint;
466 		intrarg = sc->sc_pintarg;
467 
468 		if (intr == NULL || intrarg == NULL) {
469 			cv_wait_sig(&sc->sc_datacv, &sc->sc_intr_lock);
470 			continue;
471 		}
472 
473 		KASSERT(sc->sc_pblksize != 0);
474 
475 		if (sc->sc_abytes < sc->sc_pblksize) {
476 			cv_wait_sig(&sc->sc_datacv, &sc->sc_intr_lock);
477 			continue;
478 		}
479 		count = sc->sc_pblksize;
480 
481 		memset(&msg, 0, sizeof(msg));
482 		msg.type = VC_AUDIO_MSG_TYPE_WRITE;
483 		msg.u.write.max_packet = VCAUDIO_MSGSIZE;
484 		msg.u.write.count = count;
485 		msg.u.write.callback = intr;
486 		msg.u.write.cookie = intrarg;
487 		msg.u.write.silence = 0;
488 
489 	    	block = (uint8_t *)sc->sc_pstart + sc->sc_ppos;
490 		resid = count;
491 		off = 0;
492 
493 		vchi_service_use(sc->sc_service);
494 
495 		error = vchi_msg_queue(sc->sc_service, &msg, sizeof(msg),
496 		    VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL);
497 		if (error) {
498 			printf("%s: failed to write (%d)\n", __func__, error);
499 			goto done;
500 		}
501 
502 		while (resid > 0) {
503 			nb = min(resid, msg.u.write.max_packet);
504 			error = vchi_msg_queue(sc->sc_service,
505 			    (char *)block + off, nb,
506 			    VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL);
507 			if (error) {
508 				/* XXX What to do here? */
509 				device_printf(sc->sc_dev,
510 				    "failed to queue data (%d)\n", error);
511 				goto done;
512 			}
513 			off += nb;
514 			resid -= nb;
515 		}
516 
517 		sc->sc_abytes -= count;
518 		sc->sc_ppos += count;
519 		if ((uint8_t *)sc->sc_pstart + sc->sc_ppos >=
520 		    (uint8_t *)sc->sc_pend)
521 			sc->sc_ppos = 0;
522 
523 		if (!sc->sc_started) {
524         		++sc->sc_pblkcnt;
525 
526 			if (sc->sc_pblkcnt == VCAUDIO_PREFILLCOUNT) {
527 
528 				memset(&msg, 0, sizeof(msg));
529 				msg.type = VC_AUDIO_MSG_TYPE_START;
530 				error = vchi_msg_queue(sc->sc_service, &msg,
531 				    sizeof(msg), VCHI_FLAGS_BLOCK_UNTIL_QUEUED,
532 				    NULL);
533 				if (error) {
534 					device_printf(sc->sc_dev,
535 					    "failed to start (%d)\n", error);
536 					goto done;
537 				}
538 				sc->sc_started = true;
539 				sc->sc_pbytes = 0;
540 			} else {
541 				intr(intrarg);
542 				sc->sc_abytes += sc->sc_pblksize;
543 			}
544 		}
545 
546 done:
547 		vchi_service_release(sc->sc_service);
548 	}
549 }
550 
551 static int
552 vcaudio_msg_sync(struct vcaudio_softc *sc, VC_AUDIO_MSG_T *msg, size_t msglen)
553 {
554 	int error = 0;
555 
556 	mutex_enter(&sc->sc_msglock);
557 
558 	sc->sc_success = -1;
559 	sc->sc_msgdone = false;
560 
561 	error = vchi_msg_queue(sc->sc_service, msg, msglen,
562 	    VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL);
563 	if (error) {
564 		printf("%s: failed to queue message (%d)\n", __func__, error);
565 		goto done;
566 	}
567 
568 	while (!sc->sc_msgdone) {
569 		error = cv_wait_sig(&sc->sc_msgcv, &sc->sc_msglock);
570 		if (error)
571 			break;
572 	}
573 	if (sc->sc_success != 0)
574 		error = EIO;
575 done:
576 	mutex_exit(&sc->sc_msglock);
577 
578 	return error;
579 }
580 
581 static int
582 vcaudio_open(void *priv, int flags)
583 {
584 	return 0;
585 }
586 
587 static void
588 vcaudio_close(void *priv)
589 {
590 }
591 
592 static int
593 vcaudio_query_encoding(void *priv, struct audio_encoding *ae)
594 {
595 	struct vcaudio_softc *sc = priv;
596 
597 	return auconv_query_encoding(sc->sc_encodings, ae);
598 }
599 
600 static int
601 vcaudio_set_params(void *priv, int setmode, int usemode,
602     audio_params_t *play, audio_params_t *rec,
603     stream_filter_list_t *pfil, stream_filter_list_t *rfil)
604 {
605 	struct vcaudio_softc *sc = priv;
606 	int index;
607 
608 	if (play && (setmode & AUMODE_PLAY)) {
609 		index = auconv_set_converter(&sc->sc_format, 1,
610 		    AUMODE_PLAY, play, true, pfil);
611 		if (index < 0)
612 			return EINVAL;
613 		if (pfil->req_size > 0)
614 			play = &pfil->filters[0].param;
615 		pfil->prepend(pfil, vcaudio_swvol_filter, play);
616 	}
617 
618 	return 0;
619 }
620 
621 static int
622 vcaudio_halt_output(void *priv)
623 {
624 	struct vcaudio_softc *sc = priv;
625 	VC_AUDIO_MSG_T msg;
626 	int error = 0;
627 
628 	KASSERT(mutex_owned(&sc->sc_intr_lock));
629 
630 	vchi_service_use(sc->sc_service);
631 	memset(&msg, 0, sizeof(msg));
632 	msg.type = VC_AUDIO_MSG_TYPE_STOP;
633 	msg.u.stop.draining = 0;
634 	error = vchi_msg_queue(sc->sc_service, &msg, sizeof(msg),
635 	    VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL);
636 	if (error) {
637 		device_printf(sc->sc_dev, "couldn't send STOP message (%d)\n",
638 		    error);
639 	}
640 	vchi_service_release(sc->sc_service);
641 
642 	sc->sc_pint = NULL;
643 	sc->sc_pintarg = NULL;
644 	sc->sc_started = false;
645 
646 #ifdef VCAUDIO_DEBUG
647 	device_printf(sc->sc_dev, "halting output\n");
648 #endif
649 
650 	return error;
651 }
652 
653 static int
654 vcaudio_halt_input(void *priv)
655 {
656 	return EINVAL;
657 }
658 
659 static int
660 vcaudio_set_volume(struct vcaudio_softc *sc, enum vcaudio_dest dest,
661     int hwvol)
662 {
663 	VC_AUDIO_MSG_T msg;
664 	int error;
665 
666 	sc->sc_hwvol[dest] = hwvol;
667 	if (dest != sc->sc_dest)
668 		return 0;
669 
670 	vchi_service_use(sc->sc_service);
671 
672 	memset(&msg, 0, sizeof(msg));
673 	msg.type = VC_AUDIO_MSG_TYPE_CONTROL;
674 	msg.u.control.volume = vol2vc(hwvol);
675 	msg.u.control.dest = dest;
676 
677 	error = vcaudio_msg_sync(sc, &msg, sizeof(msg));
678 	if (error) {
679 		device_printf(sc->sc_dev,
680 		    "couldn't send CONTROL message (%d)\n", error);
681 	}
682 
683 	vchi_service_release(sc->sc_service);
684 
685 	return error;
686 }
687 
688 static int
689 vcaudio_set_port(void *priv, mixer_ctrl_t *mc)
690 {
691 	struct vcaudio_softc *sc = priv;
692 
693 	switch (mc->dev) {
694 	case VCAUDIO_OUTPUT_MASTER_VOLUME:
695 	case VCAUDIO_INPUT_DAC_VOLUME:
696 		sc->sc_swvol = mc->un.value.level[AUDIO_MIXER_LEVEL_LEFT];
697 		return 0;
698 	case VCAUDIO_OUTPUT_AUTO_VOLUME:
699 		return vcaudio_set_volume(sc, VCAUDIO_DEST_AUTO,
700 		    mc->un.value.level[AUDIO_MIXER_LEVEL_LEFT]);
701 	case VCAUDIO_OUTPUT_HEADPHONE_VOLUME:
702 		return vcaudio_set_volume(sc, VCAUDIO_DEST_HP,
703 		    mc->un.value.level[AUDIO_MIXER_LEVEL_LEFT]);
704 	case VCAUDIO_OUTPUT_HDMI_VOLUME:
705 		return vcaudio_set_volume(sc, VCAUDIO_DEST_HDMI,
706 		    mc->un.value.level[AUDIO_MIXER_LEVEL_LEFT]);
707 	case VCAUDIO_OUTPUT_SELECT:
708 		if (mc->un.ord < 0 || mc->un.ord > 2)
709 			return EINVAL;
710 		sc->sc_dest = mc->un.ord;
711 		return vcaudio_set_volume(sc, mc->un.ord,
712 		    sc->sc_hwvol[mc->un.ord]);
713 	}
714 	return ENXIO;
715 }
716 
717 static int
718 vcaudio_get_port(void *priv, mixer_ctrl_t *mc)
719 {
720 	struct vcaudio_softc *sc = priv;
721 
722 	switch (mc->dev) {
723 	case VCAUDIO_OUTPUT_MASTER_VOLUME:
724 	case VCAUDIO_INPUT_DAC_VOLUME:
725 		mc->un.value.level[AUDIO_MIXER_LEVEL_LEFT] =
726 		    mc->un.value.level[AUDIO_MIXER_LEVEL_RIGHT] =
727 		    sc->sc_swvol;
728 		return 0;
729 	case VCAUDIO_OUTPUT_AUTO_VOLUME:
730 		mc->un.value.level[AUDIO_MIXER_LEVEL_LEFT] =
731 		    mc->un.value.level[AUDIO_MIXER_LEVEL_RIGHT] =
732 		    sc->sc_hwvol[VCAUDIO_DEST_AUTO];
733 		return 0;
734 	case VCAUDIO_OUTPUT_HEADPHONE_VOLUME:
735 		mc->un.value.level[AUDIO_MIXER_LEVEL_LEFT] =
736 		    mc->un.value.level[AUDIO_MIXER_LEVEL_RIGHT] =
737 		    sc->sc_hwvol[VCAUDIO_DEST_HP];
738 		return 0;
739 	case VCAUDIO_OUTPUT_HDMI_VOLUME:
740 		mc->un.value.level[AUDIO_MIXER_LEVEL_LEFT] =
741 		    mc->un.value.level[AUDIO_MIXER_LEVEL_RIGHT] =
742 		    sc->sc_hwvol[VCAUDIO_DEST_HDMI];
743 		return 0;
744 	case VCAUDIO_OUTPUT_SELECT:
745 		mc->un.ord = sc->sc_dest;
746 		return 0;
747 	}
748 	return ENXIO;
749 }
750 
751 static int
752 vcaudio_query_devinfo(void *priv, mixer_devinfo_t *di)
753 {
754 	switch (di->index) {
755 	case VCAUDIO_OUTPUT_CLASS:
756 		di->mixer_class = VCAUDIO_OUTPUT_CLASS;
757 		strcpy(di->label.name, AudioCoutputs);
758 		di->type = AUDIO_MIXER_CLASS;
759 		di->next = di->prev = AUDIO_MIXER_LAST;
760 		return 0;
761 	case VCAUDIO_INPUT_CLASS:
762 		di->mixer_class = VCAUDIO_INPUT_CLASS;
763 		strcpy(di->label.name, AudioCinputs);
764 		di->type = AUDIO_MIXER_CLASS;
765 		di->next = di->prev = AUDIO_MIXER_LAST;
766 		return 0;
767 	case VCAUDIO_OUTPUT_MASTER_VOLUME:
768 		di->mixer_class = VCAUDIO_OUTPUT_CLASS;
769 		strcpy(di->label.name, AudioNmaster);
770 		di->type = AUDIO_MIXER_VALUE;
771 		di->next = di->prev = AUDIO_MIXER_LAST;
772 		di->un.v.num_channels = 2;
773 		strcpy(di->un.v.units.name, AudioNvolume);
774 		return 0;
775 	case VCAUDIO_OUTPUT_AUTO_VOLUME:
776 		di->mixer_class = VCAUDIO_OUTPUT_CLASS;
777 		strcpy(di->label.name, "auto");
778 		di->type = AUDIO_MIXER_VALUE;
779 		di->next = di->prev = AUDIO_MIXER_LAST;
780 		di->un.v.num_channels = 2;
781 		di->un.v.delta = 13;
782 		strcpy(di->un.v.units.name, AudioNvolume);
783 		return 0;
784 	case VCAUDIO_OUTPUT_HEADPHONE_VOLUME:
785 		di->mixer_class = VCAUDIO_OUTPUT_CLASS;
786 		strcpy(di->label.name, AudioNheadphone);
787 		di->type = AUDIO_MIXER_VALUE;
788 		di->next = di->prev = AUDIO_MIXER_LAST;
789 		di->un.v.num_channels = 2;
790 		di->un.v.delta = 13;
791 		strcpy(di->un.v.units.name, AudioNvolume);
792 		return 0;
793 	case VCAUDIO_OUTPUT_HDMI_VOLUME:
794 		di->mixer_class = VCAUDIO_OUTPUT_CLASS;
795 		strcpy(di->label.name, "hdmi");
796 		di->type = AUDIO_MIXER_VALUE;
797 		di->next = di->prev = AUDIO_MIXER_LAST;
798 		di->un.v.num_channels = 2;
799 		di->un.v.delta = 13;
800 		strcpy(di->un.v.units.name, AudioNvolume);
801 		return 0;
802 	case VCAUDIO_INPUT_DAC_VOLUME:
803 		di->mixer_class = VCAUDIO_INPUT_CLASS;
804 		strcpy(di->label.name, AudioNdac);
805 		di->type = AUDIO_MIXER_VALUE;
806 		di->next = di->prev = AUDIO_MIXER_LAST;
807 		di->un.v.num_channels = 2;
808 		strcpy(di->un.v.units.name, AudioNvolume);
809 		return 0;
810 	case VCAUDIO_OUTPUT_SELECT:
811 		di->mixer_class = VCAUDIO_OUTPUT_CLASS;
812 		strcpy(di->label.name, AudioNselect);
813 		di->type = AUDIO_MIXER_ENUM;
814 		di->next = di->prev = AUDIO_MIXER_LAST;
815 		di->un.e.num_mem = 3;
816 		di->un.e.member[0].ord = 0;
817 		strcpy(di->un.e.member[0].label.name, "auto");
818 		di->un.e.member[1].ord = 1;
819 		strcpy(di->un.e.member[1].label.name, AudioNheadphone);
820 		di->un.e.member[2].ord = 2;
821 		strcpy(di->un.e.member[2].label.name, "hdmi");
822 		return 0;
823 	}
824 
825 	return ENXIO;
826 }
827 
828 static int
829 vcaudio_getdev(void *priv, struct audio_device *audiodev)
830 {
831 	struct vcaudio_softc *sc = priv;
832 
833 	snprintf(audiodev->name, sizeof(audiodev->name), "vchiq auds");
834 	snprintf(audiodev->version, sizeof(audiodev->version),
835 	    "%d", sc->sc_peer_version);
836 	snprintf(audiodev->config, sizeof(audiodev->config), "vcaudio");
837 
838 	return 0;
839 }
840 
841 static int
842 vcaudio_get_props(void *priv)
843 {
844 	return AUDIO_PROP_PLAYBACK|AUDIO_PROP_CAPTURE|AUDIO_PROP_INDEPENDENT;
845 }
846 
847 static int
848 vcaudio_round_blocksize(void *priv, int bs, int mode,
849     const audio_params_t *params)
850 {
851 	return VCAUDIO_BLOCKSIZE;
852 }
853 
854 static size_t
855 vcaudio_round_buffersize(void *priv, int direction, size_t bufsize)
856 {
857 
858 	return VCAUDIO_BUFFERSIZE;
859 }
860 
861 static int
862 vcaudio_trigger_output(void *priv, void *start, void *end, int blksize,
863     void (*intr)(void *), void *intrarg, const audio_params_t *params)
864 {
865 	struct vcaudio_softc *sc = priv;
866 
867 	ASSERT_SLEEPABLE();
868 	KASSERT(mutex_owned(&sc->sc_intr_lock));
869 
870 	sc->sc_pparam = *params;
871 	sc->sc_pint = intr;
872 	sc->sc_pintarg = intrarg;
873 	sc->sc_ppos = 0;
874 	sc->sc_pstart = start;
875 	sc->sc_pend = end;
876 	sc->sc_pblksize = blksize;
877 	sc->sc_pblkcnt = 0;
878 	sc->sc_pbytes = 0;
879 	sc->sc_abytes = blksize;
880 
881 	cv_signal(&sc->sc_datacv);
882 
883 	return 0;
884 }
885 
886 static int
887 vcaudio_trigger_input(void *priv, void *start, void *end, int blksize,
888     void (*intr)(void *), void *intrarg, const audio_params_t *params)
889 {
890 	return EINVAL;
891 }
892 
893 static void
894 vcaudio_get_locks(void *priv, kmutex_t **intr, kmutex_t **thread)
895 {
896 	struct vcaudio_softc *sc = priv;
897 
898 	*intr = &sc->sc_intr_lock;
899 	*thread = &sc->sc_lock;
900 }
901 
902 static stream_filter_t *
903 vcaudio_swvol_filter(struct audio_softc *asc,
904     const audio_params_t *from, const audio_params_t *to)
905 {
906 	auvolconv_filter_t *this;
907 	device_t dev = audio_get_device(asc);
908 	struct vcaudio_softc *sc = device_private(dev);
909 
910 	this = kmem_alloc(sizeof(auvolconv_filter_t), KM_SLEEP);
911 	this->base.base.fetch_to = auvolconv_slinear16_le_fetch_to;
912 	this->base.dtor = vcaudio_swvol_dtor;
913 	this->base.set_fetcher = stream_filter_set_fetcher;
914 	this->base.set_inputbuffer = stream_filter_set_inputbuffer;
915 	this->vol = &sc->sc_swvol;
916 
917 	return (stream_filter_t *)this;
918 }
919 
920 static void
921 vcaudio_swvol_dtor(stream_filter_t *this)
922 {
923 	if (this)
924 		kmem_free(this, sizeof(auvolconv_filter_t));
925 }
926