1 /*-
2 * Copyright (c) 2015 Oleksandr Tymoshenko <gonzo@freebsd.org>
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26 #ifdef HAVE_KERNEL_OPTION_HEADERS
27 #include "opt_snd.h"
28 #endif
29
30 #include <dev/sound/pcm/sound.h>
31
32 #include "mixer_if.h"
33
34 #include "interface/compat/vchi_bsd.h"
35 #include "interface/vchi/vchi.h"
36 #include "interface/vchiq_arm/vchiq.h"
37
38 #include "vc_vchi_audioserv_defs.h"
39
40 /* Audio destination */
41 #define DEST_AUTO 0
42 #define DEST_HEADPHONES 1
43 #define DEST_HDMI 2
44
45 /* Playback state */
46 #define PLAYBACK_IDLE 0
47 #define PLAYBACK_PLAYING 1
48 #define PLAYBACK_STOPPING 2
49
50 /* Worker thread state */
51 #define WORKER_RUNNING 0
52 #define WORKER_STOPPING 1
53 #define WORKER_STOPPED 2
54
55 /*
56 * Worker thread flags, set to 1 in flags_pending
57 * when driver requests one or another operation
58 * from worker. Cleared to 0 once worker performs
59 * the operations.
60 */
61 #define AUDIO_PARAMS (1 << 0)
62 #define AUDIO_PLAY (1 << 1)
63 #define AUDIO_STOP (1 << 2)
64
65 #define VCHIQ_AUDIO_PACKET_SIZE 4000
66 #define VCHIQ_AUDIO_BUFFER_SIZE 10*VCHIQ_AUDIO_PACKET_SIZE
67
68 #define VCHIQ_AUDIO_MAX_VOLUME
69 /* volume in terms of 0.01dB */
70 #define VCHIQ_AUDIO_VOLUME_MIN -10239
71 #define VCHIQ_AUDIO_VOLUME(db100) (uint32_t)(-((db100) << 8)/100)
72
73 /* dB levels with 5% volume step */
74 static int db_levels[] = {
75 VCHIQ_AUDIO_VOLUME_MIN, -4605, -3794, -3218, -2772,
76 -2407, -2099, -1832, -1597, -1386,
77 -1195, -1021, -861, -713, -575,
78 -446, -325, -210, -102, 0,
79 };
80
81 static uint32_t bcm2835_audio_playfmt[] = {
82 SND_FORMAT(AFMT_U8, 1, 0),
83 SND_FORMAT(AFMT_U8, 2, 0),
84 SND_FORMAT(AFMT_S8, 1, 0),
85 SND_FORMAT(AFMT_S8, 2, 0),
86 SND_FORMAT(AFMT_S16_LE, 1, 0),
87 SND_FORMAT(AFMT_S16_LE, 2, 0),
88 SND_FORMAT(AFMT_U16_LE, 1, 0),
89 SND_FORMAT(AFMT_U16_LE, 2, 0),
90 0
91 };
92
93 static struct pcmchan_caps bcm2835_audio_playcaps = {8000, 48000, bcm2835_audio_playfmt, 0};
94
95 struct bcm2835_audio_info;
96
97 struct bcm2835_audio_chinfo {
98 struct bcm2835_audio_info *parent;
99 struct pcm_channel *channel;
100 struct snd_dbuf *buffer;
101 uint32_t fmt, spd, blksz;
102
103 /* Pointer to first unsubmitted sample */
104 uint32_t unsubmittedptr;
105 /*
106 * Number of bytes in "submitted but not played"
107 * pseudo-buffer
108 */
109 int available_space;
110 int playback_state;
111 uint64_t callbacks;
112 uint64_t submitted_samples;
113 uint64_t retrieved_samples;
114 uint64_t underruns;
115 int starved;
116 };
117
118 struct bcm2835_audio_info {
119 device_t dev;
120 unsigned int bufsz;
121 struct bcm2835_audio_chinfo pch;
122 uint32_t dest, volume;
123 struct intr_config_hook intr_hook;
124
125 /* VCHI data */
126 VCHI_INSTANCE_T vchi_instance;
127 VCHI_CONNECTION_T *vchi_connection;
128 VCHI_SERVICE_HANDLE_T vchi_handle;
129
130 struct mtx lock;
131 struct cv worker_cv;
132
133 uint32_t flags_pending;
134
135 int verbose_trace;
136 /* Worker thread state */
137 int worker_state;
138 };
139
140 #define BCM2835_AUDIO_LOCK(sc) mtx_lock(&(sc)->lock)
141 #define BCM2835_AUDIO_LOCKED(sc) mtx_assert(&(sc)->lock, MA_OWNED)
142 #define BCM2835_AUDIO_UNLOCK(sc) mtx_unlock(&(sc)->lock)
143
144 #define BCM2835_LOG_ERROR(sc,...) \
145 do { \
146 device_printf((sc)->dev, __VA_ARGS__); \
147 } while(0)
148
149 #define BCM2835_LOG_INFO(sc,...) \
150 do { \
151 if (sc->verbose_trace > 0) \
152 device_printf((sc)->dev, __VA_ARGS__); \
153 } while(0)
154
155 #define BCM2835_LOG_WARN(sc,...) \
156 do { \
157 if (sc->verbose_trace > 1) \
158 device_printf((sc)->dev, __VA_ARGS__); \
159 } while(0)
160
161 #define BCM2835_LOG_TRACE(sc,...) \
162 do { \
163 if(sc->verbose_trace > 2) \
164 device_printf((sc)->dev, __VA_ARGS__); \
165 } while(0)
166
167 static const char *
dest_description(uint32_t dest)168 dest_description(uint32_t dest)
169 {
170 switch (dest) {
171 case DEST_AUTO:
172 return "AUTO";
173 break;
174
175 case DEST_HEADPHONES:
176 return "HEADPHONES";
177 break;
178
179 case DEST_HDMI:
180 return "HDMI";
181 break;
182 default:
183 return "UNKNOWN";
184 break;
185 }
186 }
187
188 static void
bcm2835_worker_update_params(struct bcm2835_audio_info * sc)189 bcm2835_worker_update_params(struct bcm2835_audio_info *sc)
190 {
191
192 BCM2835_AUDIO_LOCKED(sc);
193
194 sc->flags_pending |= AUDIO_PARAMS;
195 cv_signal(&sc->worker_cv);
196 }
197
198 static void
bcm2835_worker_play_start(struct bcm2835_audio_info * sc)199 bcm2835_worker_play_start(struct bcm2835_audio_info *sc)
200 {
201 BCM2835_AUDIO_LOCK(sc);
202 sc->flags_pending &= ~(AUDIO_STOP);
203 sc->flags_pending |= AUDIO_PLAY;
204 cv_signal(&sc->worker_cv);
205 BCM2835_AUDIO_UNLOCK(sc);
206 }
207
208 static void
bcm2835_worker_play_stop(struct bcm2835_audio_info * sc)209 bcm2835_worker_play_stop(struct bcm2835_audio_info *sc)
210 {
211 BCM2835_AUDIO_LOCK(sc);
212 sc->flags_pending &= ~(AUDIO_PLAY);
213 sc->flags_pending |= AUDIO_STOP;
214 cv_signal(&sc->worker_cv);
215 BCM2835_AUDIO_UNLOCK(sc);
216 }
217
218 static void
bcm2835_audio_callback(void * param,const VCHI_CALLBACK_REASON_T reason,void * msg_handle)219 bcm2835_audio_callback(void *param, const VCHI_CALLBACK_REASON_T reason, void *msg_handle)
220 {
221 struct bcm2835_audio_info *sc = (struct bcm2835_audio_info *)param;
222 int32_t status;
223 uint32_t msg_len;
224 VC_AUDIO_MSG_T m;
225
226 if (reason != VCHI_CALLBACK_MSG_AVAILABLE)
227 return;
228
229 status = vchi_msg_dequeue(sc->vchi_handle,
230 &m, sizeof m, &msg_len, VCHI_FLAGS_NONE);
231 if (status != 0)
232 return;
233 if (m.type == VC_AUDIO_MSG_TYPE_RESULT) {
234 if (m.u.result.success) {
235 device_printf(sc->dev,
236 "msg type %08x failed\n",
237 m.type);
238 }
239 } else if (m.type == VC_AUDIO_MSG_TYPE_COMPLETE) {
240 struct bcm2835_audio_chinfo *ch = m.u.complete.cookie;
241
242 int count = m.u.complete.count & 0xffff;
243 int perr = (m.u.complete.count & (1U << 30)) != 0;
244 ch->callbacks++;
245 if (perr)
246 ch->underruns++;
247
248 BCM2835_AUDIO_LOCK(sc);
249 if (ch->playback_state != PLAYBACK_IDLE) {
250 /* Prevent LOR */
251 BCM2835_AUDIO_UNLOCK(sc);
252 chn_intr(sc->pch.channel);
253 BCM2835_AUDIO_LOCK(sc);
254 }
255 /* We should check again, state might have changed */
256 if (ch->playback_state != PLAYBACK_IDLE) {
257 if (!perr) {
258 if ((ch->available_space + count)> VCHIQ_AUDIO_BUFFER_SIZE) {
259 device_printf(sc->dev, "inconsistent data in callback:\n");
260 device_printf(sc->dev, "available_space == %d, count = %d, perr=%d\n",
261 ch->available_space, count, perr);
262 device_printf(sc->dev,
263 "retrieved_samples = %ju, submitted_samples = %ju\n",
264 (uintmax_t)ch->retrieved_samples,
265 (uintmax_t)ch->submitted_samples);
266 }
267 ch->available_space += count;
268 ch->retrieved_samples += count;
269 }
270 if (perr || (ch->available_space >= VCHIQ_AUDIO_PACKET_SIZE))
271 cv_signal(&sc->worker_cv);
272 }
273 BCM2835_AUDIO_UNLOCK(sc);
274 } else
275 BCM2835_LOG_WARN(sc, "%s: unknown m.type: %d\n", __func__,
276 m.type);
277 }
278
279 /* VCHIQ stuff */
280 static void
bcm2835_audio_init(struct bcm2835_audio_info * sc)281 bcm2835_audio_init(struct bcm2835_audio_info *sc)
282 {
283 int status;
284
285 /* Initialize and create a VCHI connection */
286 status = vchi_initialise(&sc->vchi_instance);
287 if (status != 0) {
288 BCM2835_LOG_ERROR(sc, "vchi_initialise failed: %d\n", status);
289 return;
290 }
291
292 status = vchi_connect(NULL, 0, sc->vchi_instance);
293 if (status != 0) {
294 BCM2835_LOG_ERROR(sc, "vchi_connect failed: %d\n", status);
295 return;
296 }
297
298 SERVICE_CREATION_T params = {
299 VCHI_VERSION_EX(VC_AUDIOSERV_VER, VC_AUDIOSERV_MIN_VER),
300 VC_AUDIO_SERVER_NAME, /* 4cc service code */
301 sc->vchi_connection, /* passed in fn pointers */
302 0, /* rx fifo size */
303 0, /* tx fifo size */
304 bcm2835_audio_callback, /* service callback */
305 sc, /* service callback parameter */
306 1,
307 1,
308 0 /* want crc check on bulk transfers */
309 };
310
311 status = vchi_service_open(sc->vchi_instance, ¶ms,
312 &sc->vchi_handle);
313
314 if (status != 0)
315 sc->vchi_handle = VCHIQ_SERVICE_HANDLE_INVALID;
316 }
317
318 static void
bcm2835_audio_release(struct bcm2835_audio_info * sc)319 bcm2835_audio_release(struct bcm2835_audio_info *sc)
320 {
321 int success;
322
323 if (sc->vchi_handle != VCHIQ_SERVICE_HANDLE_INVALID) {
324 success = vchi_service_close(sc->vchi_handle);
325 if (success != 0)
326 BCM2835_LOG_ERROR(sc, "vchi_service_close failed: %d\n",
327 success);
328 vchi_service_release(sc->vchi_handle);
329 sc->vchi_handle = VCHIQ_SERVICE_HANDLE_INVALID;
330 }
331
332 vchi_disconnect(sc->vchi_instance);
333 }
334
335 static void
bcm2835_audio_reset_channel(struct bcm2835_audio_chinfo * ch)336 bcm2835_audio_reset_channel(struct bcm2835_audio_chinfo *ch)
337 {
338
339 ch->available_space = VCHIQ_AUDIO_BUFFER_SIZE;
340 ch->unsubmittedptr = 0;
341 sndbuf_reset(ch->buffer);
342 }
343
344 static void
bcm2835_audio_start(struct bcm2835_audio_chinfo * ch)345 bcm2835_audio_start(struct bcm2835_audio_chinfo *ch)
346 {
347 VC_AUDIO_MSG_T m;
348 int ret;
349 struct bcm2835_audio_info *sc = ch->parent;
350
351 if (sc->vchi_handle != VCHIQ_SERVICE_HANDLE_INVALID) {
352 m.type = VC_AUDIO_MSG_TYPE_START;
353 ret = vchi_msg_queue(sc->vchi_handle,
354 &m, sizeof m, VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL);
355
356 if (ret != 0)
357 BCM2835_LOG_ERROR(sc,
358 "%s: vchi_msg_queue failed (err %d)\n", __func__,
359 ret);
360 }
361 }
362
363 static void
bcm2835_audio_stop(struct bcm2835_audio_chinfo * ch)364 bcm2835_audio_stop(struct bcm2835_audio_chinfo *ch)
365 {
366 VC_AUDIO_MSG_T m;
367 int ret;
368 struct bcm2835_audio_info *sc = ch->parent;
369
370 if (sc->vchi_handle != VCHIQ_SERVICE_HANDLE_INVALID) {
371 m.type = VC_AUDIO_MSG_TYPE_STOP;
372 m.u.stop.draining = 0;
373
374 ret = vchi_msg_queue(sc->vchi_handle,
375 &m, sizeof m, VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL);
376
377 if (ret != 0)
378 BCM2835_LOG_ERROR(sc,
379 "%s: vchi_msg_queue failed (err %d)\n", __func__,
380 ret);
381 }
382 }
383
384 static void
bcm2835_audio_open(struct bcm2835_audio_info * sc)385 bcm2835_audio_open(struct bcm2835_audio_info *sc)
386 {
387 VC_AUDIO_MSG_T m;
388 int ret;
389
390 if (sc->vchi_handle != VCHIQ_SERVICE_HANDLE_INVALID) {
391 m.type = VC_AUDIO_MSG_TYPE_OPEN;
392 ret = vchi_msg_queue(sc->vchi_handle,
393 &m, sizeof m, VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL);
394
395 if (ret != 0)
396 BCM2835_LOG_ERROR(sc,
397 "%s: vchi_msg_queue failed (err %d)\n", __func__,
398 ret);
399 }
400 }
401
402 static void
bcm2835_audio_update_controls(struct bcm2835_audio_info * sc,uint32_t volume,uint32_t dest)403 bcm2835_audio_update_controls(struct bcm2835_audio_info *sc, uint32_t volume, uint32_t dest)
404 {
405 VC_AUDIO_MSG_T m;
406 int ret, db;
407
408 if (sc->vchi_handle != VCHIQ_SERVICE_HANDLE_INVALID) {
409 m.type = VC_AUDIO_MSG_TYPE_CONTROL;
410 m.u.control.dest = dest;
411 if (volume > 99)
412 volume = 99;
413 db = db_levels[volume/5];
414 m.u.control.volume = VCHIQ_AUDIO_VOLUME(db);
415
416 ret = vchi_msg_queue(sc->vchi_handle,
417 &m, sizeof m, VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL);
418
419 if (ret != 0)
420 BCM2835_LOG_ERROR(sc,
421 "%s: vchi_msg_queue failed (err %d)\n", __func__,
422 ret);
423 }
424 }
425
426 static void
bcm2835_audio_update_params(struct bcm2835_audio_info * sc,uint32_t fmt,uint32_t speed)427 bcm2835_audio_update_params(struct bcm2835_audio_info *sc, uint32_t fmt, uint32_t speed)
428 {
429 VC_AUDIO_MSG_T m;
430 int ret;
431
432 if (sc->vchi_handle != VCHIQ_SERVICE_HANDLE_INVALID) {
433 m.type = VC_AUDIO_MSG_TYPE_CONFIG;
434 m.u.config.channels = AFMT_CHANNEL(fmt);
435 m.u.config.samplerate = speed;
436 m.u.config.bps = AFMT_BIT(fmt);
437
438 ret = vchi_msg_queue(sc->vchi_handle,
439 &m, sizeof m, VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL);
440
441 if (ret != 0)
442 BCM2835_LOG_ERROR(sc,
443 "%s: vchi_msg_queue failed (err %d)\n", __func__,
444 ret);
445 }
446 }
447
448 static bool
bcm2835_audio_buffer_should_sleep(struct bcm2835_audio_chinfo * ch)449 bcm2835_audio_buffer_should_sleep(struct bcm2835_audio_chinfo *ch)
450 {
451
452 if (ch->playback_state != PLAYBACK_PLAYING)
453 return (true);
454
455 /* Not enough data */
456 if (sndbuf_getready(ch->buffer) < VCHIQ_AUDIO_PACKET_SIZE) {
457 printf("starve\n");
458 ch->starved++;
459 return (true);
460 }
461
462 /* Not enough free space */
463 if (ch->available_space < VCHIQ_AUDIO_PACKET_SIZE) {
464 return (true);
465 }
466
467 return (false);
468 }
469
470 static void
bcm2835_audio_write_samples(struct bcm2835_audio_chinfo * ch,void * buf,uint32_t count)471 bcm2835_audio_write_samples(struct bcm2835_audio_chinfo *ch, void *buf, uint32_t count)
472 {
473 struct bcm2835_audio_info *sc = ch->parent;
474 VC_AUDIO_MSG_T m;
475 int ret;
476
477 if (sc->vchi_handle == VCHIQ_SERVICE_HANDLE_INVALID) {
478 return;
479 }
480
481 m.type = VC_AUDIO_MSG_TYPE_WRITE;
482 m.u.write.count = count;
483 m.u.write.max_packet = VCHIQ_AUDIO_PACKET_SIZE;
484 m.u.write.callback = NULL;
485 m.u.write.cookie = ch;
486 m.u.write.silence = 0;
487
488 ret = vchi_msg_queue(sc->vchi_handle,
489 &m, sizeof m, VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL);
490
491 if (ret != 0)
492 BCM2835_LOG_ERROR(sc, "%s: vchi_msg_queue failed (err %d)\n",
493 __func__, ret);
494
495 while (count > 0) {
496 int bytes = MIN((int)m.u.write.max_packet, (int)count);
497 ret = vchi_msg_queue(sc->vchi_handle,
498 buf, bytes, VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL);
499 if (ret != 0)
500 BCM2835_LOG_ERROR(sc, "%s: vchi_msg_queue failed: %d\n",
501 __func__, ret);
502 buf = (char *)buf + bytes;
503 count -= bytes;
504 }
505 }
506
507 static void
bcm2835_audio_worker(void * data)508 bcm2835_audio_worker(void *data)
509 {
510 struct bcm2835_audio_info *sc = (struct bcm2835_audio_info *)data;
511 struct bcm2835_audio_chinfo *ch = &sc->pch;
512 uint32_t speed, format;
513 uint32_t volume, dest;
514 uint32_t flags;
515 uint32_t count, size, readyptr;
516 uint8_t *buf;
517
518 ch->playback_state = PLAYBACK_IDLE;
519
520 while (1) {
521 if (sc->worker_state != WORKER_RUNNING)
522 break;
523
524 BCM2835_AUDIO_LOCK(sc);
525 /*
526 * wait until there are flags set or buffer is ready
527 * to consume more samples
528 */
529 while ((sc->flags_pending == 0) &&
530 bcm2835_audio_buffer_should_sleep(ch)) {
531 cv_wait_sig(&sc->worker_cv, &sc->lock);
532 }
533 flags = sc->flags_pending;
534 /* Clear pending flags */
535 sc->flags_pending = 0;
536 BCM2835_AUDIO_UNLOCK(sc);
537
538 /* Requested to change parameters */
539 if (flags & AUDIO_PARAMS) {
540 BCM2835_AUDIO_LOCK(sc);
541 speed = ch->spd;
542 format = ch->fmt;
543 volume = sc->volume;
544 dest = sc->dest;
545 BCM2835_AUDIO_UNLOCK(sc);
546 if (ch->playback_state == PLAYBACK_IDLE)
547 bcm2835_audio_update_params(sc, format, speed);
548 bcm2835_audio_update_controls(sc, volume, dest);
549 }
550
551 /* Requested to stop playback */
552 if ((flags & AUDIO_STOP) &&
553 (ch->playback_state == PLAYBACK_PLAYING)) {
554 bcm2835_audio_stop(ch);
555 BCM2835_AUDIO_LOCK(sc);
556 bcm2835_audio_reset_channel(&sc->pch);
557 ch->playback_state = PLAYBACK_IDLE;
558 BCM2835_AUDIO_UNLOCK(sc);
559 continue;
560 }
561
562 /* Requested to start playback */
563 if ((flags & AUDIO_PLAY) &&
564 (ch->playback_state == PLAYBACK_IDLE)) {
565 BCM2835_AUDIO_LOCK(sc);
566 ch->playback_state = PLAYBACK_PLAYING;
567 BCM2835_AUDIO_UNLOCK(sc);
568 bcm2835_audio_start(ch);
569 }
570
571 if (ch->playback_state == PLAYBACK_IDLE)
572 continue;
573
574 if (sndbuf_getready(ch->buffer) == 0)
575 continue;
576
577 count = sndbuf_getready(ch->buffer);
578 size = ch->buffer->bufsize;
579 readyptr = sndbuf_getreadyptr(ch->buffer);
580
581 BCM2835_AUDIO_LOCK(sc);
582 if (readyptr + count > size)
583 count = size - readyptr;
584 count = min(count, ch->available_space);
585 count -= (count % VCHIQ_AUDIO_PACKET_SIZE);
586 BCM2835_AUDIO_UNLOCK(sc);
587
588 if (count < VCHIQ_AUDIO_PACKET_SIZE)
589 continue;
590
591 buf = ch->buffer->buf + readyptr;
592
593 bcm2835_audio_write_samples(ch, buf, count);
594 BCM2835_AUDIO_LOCK(sc);
595 ch->unsubmittedptr = (ch->unsubmittedptr + count) %
596 ch->buffer->bufsize;
597 ch->available_space -= count;
598 ch->submitted_samples += count;
599 KASSERT(ch->available_space >= 0, ("ch->available_space == %d\n", ch->available_space));
600 BCM2835_AUDIO_UNLOCK(sc);
601 }
602
603 BCM2835_AUDIO_LOCK(sc);
604 sc->worker_state = WORKER_STOPPED;
605 cv_signal(&sc->worker_cv);
606 BCM2835_AUDIO_UNLOCK(sc);
607
608 kproc_exit(0);
609 }
610
611 static void
bcm2835_audio_create_worker(struct bcm2835_audio_info * sc)612 bcm2835_audio_create_worker(struct bcm2835_audio_info *sc)
613 {
614 struct proc *newp;
615
616 sc->worker_state = WORKER_RUNNING;
617 if (kproc_create(bcm2835_audio_worker, (void*)sc, &newp, 0, 0,
618 "bcm2835_audio_worker") != 0) {
619 BCM2835_LOG_ERROR(sc,
620 "failed to create bcm2835_audio_worker\n");
621 }
622 }
623
624 /* -------------------------------------------------------------------- */
625 /* channel interface for VCHI audio */
626 static void *
bcmchan_init(kobj_t obj,void * devinfo,struct snd_dbuf * b,struct pcm_channel * c,int dir)627 bcmchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
628 {
629 struct bcm2835_audio_info *sc = devinfo;
630 struct bcm2835_audio_chinfo *ch = &sc->pch;
631 void *buffer;
632
633 if (dir == PCMDIR_REC)
634 return NULL;
635
636 ch->parent = sc;
637 ch->channel = c;
638 ch->buffer = b;
639
640 /* default values */
641 ch->spd = 44100;
642 ch->fmt = SND_FORMAT(AFMT_S16_LE, 2, 0);
643 ch->blksz = VCHIQ_AUDIO_PACKET_SIZE;
644
645 buffer = malloc(sc->bufsz, M_DEVBUF, M_WAITOK | M_ZERO);
646
647 if (sndbuf_setup(ch->buffer, buffer, sc->bufsz) != 0) {
648 device_printf(sc->dev, "sndbuf_setup failed\n");
649 free(buffer, M_DEVBUF);
650 return NULL;
651 }
652
653 BCM2835_AUDIO_LOCK(sc);
654 bcm2835_worker_update_params(sc);
655 BCM2835_AUDIO_UNLOCK(sc);
656
657 return ch;
658 }
659
660 static int
bcmchan_free(kobj_t obj,void * data)661 bcmchan_free(kobj_t obj, void *data)
662 {
663 struct bcm2835_audio_chinfo *ch = data;
664 void *buffer;
665
666 buffer = ch->buffer->buf;
667 if (buffer)
668 free(buffer, M_DEVBUF);
669
670 return (0);
671 }
672
673 static int
bcmchan_setformat(kobj_t obj,void * data,uint32_t format)674 bcmchan_setformat(kobj_t obj, void *data, uint32_t format)
675 {
676 struct bcm2835_audio_chinfo *ch = data;
677 struct bcm2835_audio_info *sc = ch->parent;
678
679 BCM2835_AUDIO_LOCK(sc);
680 ch->fmt = format;
681 bcm2835_worker_update_params(sc);
682 BCM2835_AUDIO_UNLOCK(sc);
683
684 return 0;
685 }
686
687 static uint32_t
bcmchan_setspeed(kobj_t obj,void * data,uint32_t speed)688 bcmchan_setspeed(kobj_t obj, void *data, uint32_t speed)
689 {
690 struct bcm2835_audio_chinfo *ch = data;
691 struct bcm2835_audio_info *sc = ch->parent;
692
693 BCM2835_AUDIO_LOCK(sc);
694 ch->spd = speed;
695 bcm2835_worker_update_params(sc);
696 BCM2835_AUDIO_UNLOCK(sc);
697
698 return ch->spd;
699 }
700
701 static uint32_t
bcmchan_setblocksize(kobj_t obj,void * data,uint32_t blocksize)702 bcmchan_setblocksize(kobj_t obj, void *data, uint32_t blocksize)
703 {
704 struct bcm2835_audio_chinfo *ch = data;
705
706 return ch->blksz;
707 }
708
709 static int
bcmchan_trigger(kobj_t obj,void * data,int go)710 bcmchan_trigger(kobj_t obj, void *data, int go)
711 {
712 struct bcm2835_audio_chinfo *ch = data;
713 struct bcm2835_audio_info *sc = ch->parent;
714
715 if (!PCMTRIG_COMMON(go))
716 return (0);
717
718 switch (go) {
719 case PCMTRIG_START:
720 /* kickstart data flow */
721 chn_intr(sc->pch.channel);
722 ch->submitted_samples = 0;
723 ch->retrieved_samples = 0;
724 bcm2835_worker_play_start(sc);
725 break;
726
727 case PCMTRIG_STOP:
728 case PCMTRIG_ABORT:
729 bcm2835_worker_play_stop(sc);
730 break;
731
732 default:
733 break;
734 }
735 return 0;
736 }
737
738 static uint32_t
bcmchan_getptr(kobj_t obj,void * data)739 bcmchan_getptr(kobj_t obj, void *data)
740 {
741 struct bcm2835_audio_chinfo *ch = data;
742 struct bcm2835_audio_info *sc = ch->parent;
743 uint32_t ret;
744
745 BCM2835_AUDIO_LOCK(sc);
746 ret = ch->unsubmittedptr;
747 BCM2835_AUDIO_UNLOCK(sc);
748
749 return ret;
750 }
751
752 static struct pcmchan_caps *
bcmchan_getcaps(kobj_t obj,void * data)753 bcmchan_getcaps(kobj_t obj, void *data)
754 {
755
756 return &bcm2835_audio_playcaps;
757 }
758
759 static kobj_method_t bcmchan_methods[] = {
760 KOBJMETHOD(channel_init, bcmchan_init),
761 KOBJMETHOD(channel_free, bcmchan_free),
762 KOBJMETHOD(channel_setformat, bcmchan_setformat),
763 KOBJMETHOD(channel_setspeed, bcmchan_setspeed),
764 KOBJMETHOD(channel_setblocksize, bcmchan_setblocksize),
765 KOBJMETHOD(channel_trigger, bcmchan_trigger),
766 KOBJMETHOD(channel_getptr, bcmchan_getptr),
767 KOBJMETHOD(channel_getcaps, bcmchan_getcaps),
768 KOBJMETHOD_END
769 };
770 CHANNEL_DECLARE(bcmchan);
771
772 /************************************************************/
773
774 static int
bcmmix_init(struct snd_mixer * m)775 bcmmix_init(struct snd_mixer *m)
776 {
777
778 mix_setdevs(m, SOUND_MASK_VOLUME);
779
780 return (0);
781 }
782
783 static int
bcmmix_set(struct snd_mixer * m,unsigned dev,unsigned left,unsigned right)784 bcmmix_set(struct snd_mixer *m, unsigned dev, unsigned left, unsigned right)
785 {
786 struct bcm2835_audio_info *sc = mix_getdevinfo(m);
787
788 switch (dev) {
789 case SOUND_MIXER_VOLUME:
790 BCM2835_AUDIO_LOCK(sc);
791 sc->volume = left;
792 bcm2835_worker_update_params(sc);
793 BCM2835_AUDIO_UNLOCK(sc);
794
795 break;
796
797 default:
798 break;
799 }
800
801 return left | (left << 8);
802 }
803
804 static kobj_method_t bcmmixer_methods[] = {
805 KOBJMETHOD(mixer_init, bcmmix_init),
806 KOBJMETHOD(mixer_set, bcmmix_set),
807 KOBJMETHOD_END
808 };
809
810 MIXER_DECLARE(bcmmixer);
811
812 static int
sysctl_bcm2835_audio_dest(SYSCTL_HANDLER_ARGS)813 sysctl_bcm2835_audio_dest(SYSCTL_HANDLER_ARGS)
814 {
815 struct bcm2835_audio_info *sc = arg1;
816 int val;
817 int err;
818
819 val = sc->dest;
820 err = sysctl_handle_int(oidp, &val, 0, req);
821 if (err || !req->newptr) /* error || read request */
822 return (err);
823
824 if ((val < 0) || (val > 2))
825 return (EINVAL);
826
827 BCM2835_AUDIO_LOCK(sc);
828 sc->dest = val;
829 bcm2835_worker_update_params(sc);
830 BCM2835_AUDIO_UNLOCK(sc);
831
832 if (bootverbose)
833 device_printf(sc->dev, "destination set to %s\n", dest_description(val));
834
835 return (0);
836 }
837
838 static void
vchi_audio_sysctl_init(struct bcm2835_audio_info * sc)839 vchi_audio_sysctl_init(struct bcm2835_audio_info *sc)
840 {
841 struct sysctl_ctx_list *ctx;
842 struct sysctl_oid *tree_node;
843 struct sysctl_oid_list *tree;
844
845 /*
846 * Add system sysctl tree/handlers.
847 */
848 ctx = device_get_sysctl_ctx(sc->dev);
849 tree_node = device_get_sysctl_tree(sc->dev);
850 tree = SYSCTL_CHILDREN(tree_node);
851 SYSCTL_ADD_PROC(ctx, tree, OID_AUTO, "dest",
852 CTLFLAG_RW | CTLTYPE_UINT | CTLFLAG_NEEDGIANT, sc, sizeof(*sc),
853 sysctl_bcm2835_audio_dest, "IU", "audio destination, "
854 "0 - auto, 1 - headphones, 2 - HDMI");
855 SYSCTL_ADD_UQUAD(ctx, tree, OID_AUTO, "callbacks",
856 CTLFLAG_RD, &sc->pch.callbacks,
857 "callbacks total");
858 SYSCTL_ADD_UQUAD(ctx, tree, OID_AUTO, "submitted",
859 CTLFLAG_RD, &sc->pch.submitted_samples,
860 "last play submitted samples");
861 SYSCTL_ADD_UQUAD(ctx, tree, OID_AUTO, "retrieved",
862 CTLFLAG_RD, &sc->pch.retrieved_samples,
863 "last play retrieved samples");
864 SYSCTL_ADD_UQUAD(ctx, tree, OID_AUTO, "underruns",
865 CTLFLAG_RD, &sc->pch.underruns,
866 "callback underruns");
867 SYSCTL_ADD_INT(ctx, tree, OID_AUTO, "freebuffer",
868 CTLFLAG_RD, &sc->pch.available_space,
869 sc->pch.available_space, "callbacks total");
870 SYSCTL_ADD_INT(ctx, tree, OID_AUTO, "starved",
871 CTLFLAG_RD, &sc->pch.starved,
872 sc->pch.starved, "number of starved conditions");
873 SYSCTL_ADD_INT(ctx, tree, OID_AUTO, "trace",
874 CTLFLAG_RW, &sc->verbose_trace,
875 sc->verbose_trace, "enable tracing of transfers");
876 }
877
878 static void
bcm2835_audio_identify(driver_t * driver,device_t parent)879 bcm2835_audio_identify(driver_t *driver, device_t parent)
880 {
881
882 BUS_ADD_CHILD(parent, 0, "pcm", 0);
883 }
884
885 static int
bcm2835_audio_probe(device_t dev)886 bcm2835_audio_probe(device_t dev)
887 {
888
889 device_set_desc(dev, "VCHIQ audio");
890 return (BUS_PROBE_DEFAULT);
891 }
892
893 static void
bcm2835_audio_delayed_init(void * xsc)894 bcm2835_audio_delayed_init(void *xsc)
895 {
896 struct bcm2835_audio_info *sc;
897 char status[SND_STATUSLEN];
898
899 sc = xsc;
900
901 config_intrhook_disestablish(&sc->intr_hook);
902
903 bcm2835_audio_init(sc);
904 bcm2835_audio_open(sc);
905 sc->volume = 75;
906 sc->dest = DEST_AUTO;
907 sc->verbose_trace = 0;
908
909 if (mixer_init(sc->dev, &bcmmixer_class, sc)) {
910 device_printf(sc->dev, "mixer_init failed\n");
911 goto no;
912 }
913
914 pcm_init(sc->dev, sc);
915
916 pcm_addchan(sc->dev, PCMDIR_PLAY, &bcmchan_class, sc);
917 snprintf(status, SND_STATUSLEN, "at VCHIQ");
918 if (pcm_register(sc->dev, status)) {
919 device_printf(sc->dev, "pcm_register failed\n");
920 goto no;
921 }
922
923 bcm2835_audio_reset_channel(&sc->pch);
924 bcm2835_audio_create_worker(sc);
925
926 vchi_audio_sysctl_init(sc);
927
928 no:
929 ;
930 }
931
932 static int
bcm2835_audio_attach(device_t dev)933 bcm2835_audio_attach(device_t dev)
934 {
935 struct bcm2835_audio_info *sc;
936
937 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK | M_ZERO);
938
939 sc->dev = dev;
940 sc->bufsz = VCHIQ_AUDIO_BUFFER_SIZE;
941
942 mtx_init(&sc->lock, device_get_nameunit(dev),
943 "bcm_audio_lock", MTX_DEF);
944 cv_init(&sc->worker_cv, "worker_cv");
945 sc->vchi_handle = VCHIQ_SERVICE_HANDLE_INVALID;
946
947 /*
948 * We need interrupts enabled for VCHI to work properly,
949 * so delay initialization until it happens.
950 */
951 sc->intr_hook.ich_func = bcm2835_audio_delayed_init;
952 sc->intr_hook.ich_arg = sc;
953
954 if (config_intrhook_establish(&sc->intr_hook) != 0)
955 goto no;
956
957 return 0;
958
959 no:
960 return ENXIO;
961 }
962
963 static int
bcm2835_audio_detach(device_t dev)964 bcm2835_audio_detach(device_t dev)
965 {
966 int r;
967 struct bcm2835_audio_info *sc;
968 sc = pcm_getdevinfo(dev);
969
970 /* Stop worker thread */
971 BCM2835_AUDIO_LOCK(sc);
972 sc->worker_state = WORKER_STOPPING;
973 cv_signal(&sc->worker_cv);
974 /* Wait for thread to exit */
975 while (sc->worker_state != WORKER_STOPPED)
976 cv_wait_sig(&sc->worker_cv, &sc->lock);
977 BCM2835_AUDIO_UNLOCK(sc);
978
979 r = pcm_unregister(dev);
980 if (r)
981 return r;
982
983 mtx_destroy(&sc->lock);
984 cv_destroy(&sc->worker_cv);
985
986 bcm2835_audio_release(sc);
987
988 free(sc, M_DEVBUF);
989
990 return 0;
991 }
992
993 static device_method_t bcm2835_audio_methods[] = {
994 /* Device interface */
995 DEVMETHOD(device_identify, bcm2835_audio_identify),
996 DEVMETHOD(device_probe, bcm2835_audio_probe),
997 DEVMETHOD(device_attach, bcm2835_audio_attach),
998 DEVMETHOD(device_detach, bcm2835_audio_detach),
999 { 0, 0 }
1000 };
1001
1002 static driver_t bcm2835_audio_driver = {
1003 "pcm",
1004 bcm2835_audio_methods,
1005 PCM_SOFTC_SIZE,
1006 };
1007
1008 DRIVER_MODULE(bcm2835_audio, vchiq, bcm2835_audio_driver, 0, 0);
1009 MODULE_DEPEND(bcm2835_audio, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER);
1010 MODULE_DEPEND(bcm2835_audio, vchiq, 1, 1, 1);
1011 MODULE_VERSION(bcm2835_audio, 1);
1012