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 = sndbuf_getsize(ch->buffer);
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 = (uint8_t*)sndbuf_getbuf(ch->buffer) + readyptr;
592
593 bcm2835_audio_write_samples(ch, buf, count);
594 BCM2835_AUDIO_LOCK(sc);
595 ch->unsubmittedptr = (ch->unsubmittedptr + count) % sndbuf_getsize(ch->buffer);
596 ch->available_space -= count;
597 ch->submitted_samples += count;
598 KASSERT(ch->available_space >= 0, ("ch->available_space == %d\n", ch->available_space));
599 BCM2835_AUDIO_UNLOCK(sc);
600 }
601
602 BCM2835_AUDIO_LOCK(sc);
603 sc->worker_state = WORKER_STOPPED;
604 cv_signal(&sc->worker_cv);
605 BCM2835_AUDIO_UNLOCK(sc);
606
607 kproc_exit(0);
608 }
609
610 static void
bcm2835_audio_create_worker(struct bcm2835_audio_info * sc)611 bcm2835_audio_create_worker(struct bcm2835_audio_info *sc)
612 {
613 struct proc *newp;
614
615 sc->worker_state = WORKER_RUNNING;
616 if (kproc_create(bcm2835_audio_worker, (void*)sc, &newp, 0, 0,
617 "bcm2835_audio_worker") != 0) {
618 BCM2835_LOG_ERROR(sc,
619 "failed to create bcm2835_audio_worker\n");
620 }
621 }
622
623 /* -------------------------------------------------------------------- */
624 /* channel interface for VCHI audio */
625 static void *
bcmchan_init(kobj_t obj,void * devinfo,struct snd_dbuf * b,struct pcm_channel * c,int dir)626 bcmchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
627 {
628 struct bcm2835_audio_info *sc = devinfo;
629 struct bcm2835_audio_chinfo *ch = &sc->pch;
630 void *buffer;
631
632 if (dir == PCMDIR_REC)
633 return NULL;
634
635 ch->parent = sc;
636 ch->channel = c;
637 ch->buffer = b;
638
639 /* default values */
640 ch->spd = 44100;
641 ch->fmt = SND_FORMAT(AFMT_S16_LE, 2, 0);
642 ch->blksz = VCHIQ_AUDIO_PACKET_SIZE;
643
644 buffer = malloc(sc->bufsz, M_DEVBUF, M_WAITOK | M_ZERO);
645
646 if (sndbuf_setup(ch->buffer, buffer, sc->bufsz) != 0) {
647 device_printf(sc->dev, "sndbuf_setup failed\n");
648 free(buffer, M_DEVBUF);
649 return NULL;
650 }
651
652 BCM2835_AUDIO_LOCK(sc);
653 bcm2835_worker_update_params(sc);
654 BCM2835_AUDIO_UNLOCK(sc);
655
656 return ch;
657 }
658
659 static int
bcmchan_free(kobj_t obj,void * data)660 bcmchan_free(kobj_t obj, void *data)
661 {
662 struct bcm2835_audio_chinfo *ch = data;
663 void *buffer;
664
665 buffer = sndbuf_getbuf(ch->buffer);
666 if (buffer)
667 free(buffer, M_DEVBUF);
668
669 return (0);
670 }
671
672 static int
bcmchan_setformat(kobj_t obj,void * data,uint32_t format)673 bcmchan_setformat(kobj_t obj, void *data, uint32_t format)
674 {
675 struct bcm2835_audio_chinfo *ch = data;
676 struct bcm2835_audio_info *sc = ch->parent;
677
678 BCM2835_AUDIO_LOCK(sc);
679 ch->fmt = format;
680 bcm2835_worker_update_params(sc);
681 BCM2835_AUDIO_UNLOCK(sc);
682
683 return 0;
684 }
685
686 static uint32_t
bcmchan_setspeed(kobj_t obj,void * data,uint32_t speed)687 bcmchan_setspeed(kobj_t obj, void *data, uint32_t speed)
688 {
689 struct bcm2835_audio_chinfo *ch = data;
690 struct bcm2835_audio_info *sc = ch->parent;
691
692 BCM2835_AUDIO_LOCK(sc);
693 ch->spd = speed;
694 bcm2835_worker_update_params(sc);
695 BCM2835_AUDIO_UNLOCK(sc);
696
697 return ch->spd;
698 }
699
700 static uint32_t
bcmchan_setblocksize(kobj_t obj,void * data,uint32_t blocksize)701 bcmchan_setblocksize(kobj_t obj, void *data, uint32_t blocksize)
702 {
703 struct bcm2835_audio_chinfo *ch = data;
704
705 return ch->blksz;
706 }
707
708 static int
bcmchan_trigger(kobj_t obj,void * data,int go)709 bcmchan_trigger(kobj_t obj, void *data, int go)
710 {
711 struct bcm2835_audio_chinfo *ch = data;
712 struct bcm2835_audio_info *sc = ch->parent;
713
714 if (!PCMTRIG_COMMON(go))
715 return (0);
716
717 switch (go) {
718 case PCMTRIG_START:
719 /* kickstart data flow */
720 chn_intr(sc->pch.channel);
721 ch->submitted_samples = 0;
722 ch->retrieved_samples = 0;
723 bcm2835_worker_play_start(sc);
724 break;
725
726 case PCMTRIG_STOP:
727 case PCMTRIG_ABORT:
728 bcm2835_worker_play_stop(sc);
729 break;
730
731 default:
732 break;
733 }
734 return 0;
735 }
736
737 static uint32_t
bcmchan_getptr(kobj_t obj,void * data)738 bcmchan_getptr(kobj_t obj, void *data)
739 {
740 struct bcm2835_audio_chinfo *ch = data;
741 struct bcm2835_audio_info *sc = ch->parent;
742 uint32_t ret;
743
744 BCM2835_AUDIO_LOCK(sc);
745 ret = ch->unsubmittedptr;
746 BCM2835_AUDIO_UNLOCK(sc);
747
748 return ret;
749 }
750
751 static struct pcmchan_caps *
bcmchan_getcaps(kobj_t obj,void * data)752 bcmchan_getcaps(kobj_t obj, void *data)
753 {
754
755 return &bcm2835_audio_playcaps;
756 }
757
758 static kobj_method_t bcmchan_methods[] = {
759 KOBJMETHOD(channel_init, bcmchan_init),
760 KOBJMETHOD(channel_free, bcmchan_free),
761 KOBJMETHOD(channel_setformat, bcmchan_setformat),
762 KOBJMETHOD(channel_setspeed, bcmchan_setspeed),
763 KOBJMETHOD(channel_setblocksize, bcmchan_setblocksize),
764 KOBJMETHOD(channel_trigger, bcmchan_trigger),
765 KOBJMETHOD(channel_getptr, bcmchan_getptr),
766 KOBJMETHOD(channel_getcaps, bcmchan_getcaps),
767 KOBJMETHOD_END
768 };
769 CHANNEL_DECLARE(bcmchan);
770
771 /************************************************************/
772
773 static int
bcmmix_init(struct snd_mixer * m)774 bcmmix_init(struct snd_mixer *m)
775 {
776
777 mix_setdevs(m, SOUND_MASK_VOLUME);
778
779 return (0);
780 }
781
782 static int
bcmmix_set(struct snd_mixer * m,unsigned dev,unsigned left,unsigned right)783 bcmmix_set(struct snd_mixer *m, unsigned dev, unsigned left, unsigned right)
784 {
785 struct bcm2835_audio_info *sc = mix_getdevinfo(m);
786
787 switch (dev) {
788 case SOUND_MIXER_VOLUME:
789 BCM2835_AUDIO_LOCK(sc);
790 sc->volume = left;
791 bcm2835_worker_update_params(sc);
792 BCM2835_AUDIO_UNLOCK(sc);
793
794 break;
795
796 default:
797 break;
798 }
799
800 return left | (left << 8);
801 }
802
803 static kobj_method_t bcmmixer_methods[] = {
804 KOBJMETHOD(mixer_init, bcmmix_init),
805 KOBJMETHOD(mixer_set, bcmmix_set),
806 KOBJMETHOD_END
807 };
808
809 MIXER_DECLARE(bcmmixer);
810
811 static int
sysctl_bcm2835_audio_dest(SYSCTL_HANDLER_ARGS)812 sysctl_bcm2835_audio_dest(SYSCTL_HANDLER_ARGS)
813 {
814 struct bcm2835_audio_info *sc = arg1;
815 int val;
816 int err;
817
818 val = sc->dest;
819 err = sysctl_handle_int(oidp, &val, 0, req);
820 if (err || !req->newptr) /* error || read request */
821 return (err);
822
823 if ((val < 0) || (val > 2))
824 return (EINVAL);
825
826 BCM2835_AUDIO_LOCK(sc);
827 sc->dest = val;
828 bcm2835_worker_update_params(sc);
829 BCM2835_AUDIO_UNLOCK(sc);
830
831 if (bootverbose)
832 device_printf(sc->dev, "destination set to %s\n", dest_description(val));
833
834 return (0);
835 }
836
837 static void
vchi_audio_sysctl_init(struct bcm2835_audio_info * sc)838 vchi_audio_sysctl_init(struct bcm2835_audio_info *sc)
839 {
840 struct sysctl_ctx_list *ctx;
841 struct sysctl_oid *tree_node;
842 struct sysctl_oid_list *tree;
843
844 /*
845 * Add system sysctl tree/handlers.
846 */
847 ctx = device_get_sysctl_ctx(sc->dev);
848 tree_node = device_get_sysctl_tree(sc->dev);
849 tree = SYSCTL_CHILDREN(tree_node);
850 SYSCTL_ADD_PROC(ctx, tree, OID_AUTO, "dest",
851 CTLFLAG_RW | CTLTYPE_UINT | CTLFLAG_NEEDGIANT, sc, sizeof(*sc),
852 sysctl_bcm2835_audio_dest, "IU", "audio destination, "
853 "0 - auto, 1 - headphones, 2 - HDMI");
854 SYSCTL_ADD_UQUAD(ctx, tree, OID_AUTO, "callbacks",
855 CTLFLAG_RD, &sc->pch.callbacks,
856 "callbacks total");
857 SYSCTL_ADD_UQUAD(ctx, tree, OID_AUTO, "submitted",
858 CTLFLAG_RD, &sc->pch.submitted_samples,
859 "last play submitted samples");
860 SYSCTL_ADD_UQUAD(ctx, tree, OID_AUTO, "retrieved",
861 CTLFLAG_RD, &sc->pch.retrieved_samples,
862 "last play retrieved samples");
863 SYSCTL_ADD_UQUAD(ctx, tree, OID_AUTO, "underruns",
864 CTLFLAG_RD, &sc->pch.underruns,
865 "callback underruns");
866 SYSCTL_ADD_INT(ctx, tree, OID_AUTO, "freebuffer",
867 CTLFLAG_RD, &sc->pch.available_space,
868 sc->pch.available_space, "callbacks total");
869 SYSCTL_ADD_INT(ctx, tree, OID_AUTO, "starved",
870 CTLFLAG_RD, &sc->pch.starved,
871 sc->pch.starved, "number of starved conditions");
872 SYSCTL_ADD_INT(ctx, tree, OID_AUTO, "trace",
873 CTLFLAG_RW, &sc->verbose_trace,
874 sc->verbose_trace, "enable tracing of transfers");
875 }
876
877 static void
bcm2835_audio_identify(driver_t * driver,device_t parent)878 bcm2835_audio_identify(driver_t *driver, device_t parent)
879 {
880
881 BUS_ADD_CHILD(parent, 0, "pcm", 0);
882 }
883
884 static int
bcm2835_audio_probe(device_t dev)885 bcm2835_audio_probe(device_t dev)
886 {
887
888 device_set_desc(dev, "VCHIQ audio");
889 return (BUS_PROBE_DEFAULT);
890 }
891
892 static void
bcm2835_audio_delayed_init(void * xsc)893 bcm2835_audio_delayed_init(void *xsc)
894 {
895 struct bcm2835_audio_info *sc;
896 char status[SND_STATUSLEN];
897
898 sc = xsc;
899
900 config_intrhook_disestablish(&sc->intr_hook);
901
902 bcm2835_audio_init(sc);
903 bcm2835_audio_open(sc);
904 sc->volume = 75;
905 sc->dest = DEST_AUTO;
906 sc->verbose_trace = 0;
907
908 if (mixer_init(sc->dev, &bcmmixer_class, sc)) {
909 device_printf(sc->dev, "mixer_init failed\n");
910 goto no;
911 }
912
913 pcm_init(sc->dev, sc);
914
915 pcm_addchan(sc->dev, PCMDIR_PLAY, &bcmchan_class, sc);
916 snprintf(status, SND_STATUSLEN, "at VCHIQ");
917 if (pcm_register(sc->dev, status)) {
918 device_printf(sc->dev, "pcm_register failed\n");
919 goto no;
920 }
921
922 bcm2835_audio_reset_channel(&sc->pch);
923 bcm2835_audio_create_worker(sc);
924
925 vchi_audio_sysctl_init(sc);
926
927 no:
928 ;
929 }
930
931 static int
bcm2835_audio_attach(device_t dev)932 bcm2835_audio_attach(device_t dev)
933 {
934 struct bcm2835_audio_info *sc;
935
936 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK | M_ZERO);
937
938 sc->dev = dev;
939 sc->bufsz = VCHIQ_AUDIO_BUFFER_SIZE;
940
941 mtx_init(&sc->lock, device_get_nameunit(dev),
942 "bcm_audio_lock", MTX_DEF);
943 cv_init(&sc->worker_cv, "worker_cv");
944 sc->vchi_handle = VCHIQ_SERVICE_HANDLE_INVALID;
945
946 /*
947 * We need interrupts enabled for VCHI to work properly,
948 * so delay initialization until it happens.
949 */
950 sc->intr_hook.ich_func = bcm2835_audio_delayed_init;
951 sc->intr_hook.ich_arg = sc;
952
953 if (config_intrhook_establish(&sc->intr_hook) != 0)
954 goto no;
955
956 return 0;
957
958 no:
959 return ENXIO;
960 }
961
962 static int
bcm2835_audio_detach(device_t dev)963 bcm2835_audio_detach(device_t dev)
964 {
965 int r;
966 struct bcm2835_audio_info *sc;
967 sc = pcm_getdevinfo(dev);
968
969 /* Stop worker thread */
970 BCM2835_AUDIO_LOCK(sc);
971 sc->worker_state = WORKER_STOPPING;
972 cv_signal(&sc->worker_cv);
973 /* Wait for thread to exit */
974 while (sc->worker_state != WORKER_STOPPED)
975 cv_wait_sig(&sc->worker_cv, &sc->lock);
976 BCM2835_AUDIO_UNLOCK(sc);
977
978 r = pcm_unregister(dev);
979 if (r)
980 return r;
981
982 mtx_destroy(&sc->lock);
983 cv_destroy(&sc->worker_cv);
984
985 bcm2835_audio_release(sc);
986
987 free(sc, M_DEVBUF);
988
989 return 0;
990 }
991
992 static device_method_t bcm2835_audio_methods[] = {
993 /* Device interface */
994 DEVMETHOD(device_identify, bcm2835_audio_identify),
995 DEVMETHOD(device_probe, bcm2835_audio_probe),
996 DEVMETHOD(device_attach, bcm2835_audio_attach),
997 DEVMETHOD(device_detach, bcm2835_audio_detach),
998 { 0, 0 }
999 };
1000
1001 static driver_t bcm2835_audio_driver = {
1002 "pcm",
1003 bcm2835_audio_methods,
1004 PCM_SOFTC_SIZE,
1005 };
1006
1007 DRIVER_MODULE(bcm2835_audio, vchiq, bcm2835_audio_driver, 0, 0);
1008 MODULE_DEPEND(bcm2835_audio, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER);
1009 MODULE_DEPEND(bcm2835_audio, vchiq, 1, 1, 1);
1010 MODULE_VERSION(bcm2835_audio, 1);
1011