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