1
2
3
4#include <linux/dma-mapping.h>
5#include <linux/slab.h>
6#include <linux/module.h>
7#include <linux/delay.h>
8#include <linux/rpmsg.h>
9#include <sound/core.h>
10#include <sound/pcm.h>
11#include <sound/pcm_params.h>
12#include <sound/dmaengine_pcm.h>
13#include <sound/soc.h>
14
15#include "imx-pcm.h"
16#include "fsl_rpmsg.h"
17#include "imx-pcm-rpmsg.h"
18
19static struct snd_pcm_hardware imx_rpmsg_pcm_hardware = {
20 .info = SNDRV_PCM_INFO_INTERLEAVED |
21 SNDRV_PCM_INFO_BLOCK_TRANSFER |
22 SNDRV_PCM_INFO_MMAP |
23 SNDRV_PCM_INFO_MMAP_VALID |
24 SNDRV_PCM_INFO_NO_PERIOD_WAKEUP |
25 SNDRV_PCM_INFO_PAUSE |
26 SNDRV_PCM_INFO_RESUME,
27 .buffer_bytes_max = IMX_DEFAULT_DMABUF_SIZE,
28 .period_bytes_min = 512,
29 .period_bytes_max = 65536,
30 .periods_min = 2,
31 .periods_max = 6000,
32 .fifo_size = 0,
33};
34
35static int imx_rpmsg_pcm_send_message(struct rpmsg_msg *msg,
36 struct rpmsg_info *info)
37{
38 struct rpmsg_device *rpdev = info->rpdev;
39 int ret = 0;
40
41 mutex_lock(&info->msg_lock);
42 if (!rpdev) {
43 dev_err(info->dev, "rpmsg channel not ready\n");
44 mutex_unlock(&info->msg_lock);
45 return -EINVAL;
46 }
47
48 dev_dbg(&rpdev->dev, "send cmd %d\n", msg->s_msg.header.cmd);
49
50 if (!(msg->s_msg.header.type == MSG_TYPE_C))
51 reinit_completion(&info->cmd_complete);
52
53 ret = rpmsg_send(rpdev->ept, (void *)&msg->s_msg,
54 sizeof(struct rpmsg_s_msg));
55 if (ret) {
56 dev_err(&rpdev->dev, "rpmsg_send failed: %d\n", ret);
57 mutex_unlock(&info->msg_lock);
58 return ret;
59 }
60
61
62 if (msg->s_msg.header.type == MSG_TYPE_C) {
63 mutex_unlock(&info->msg_lock);
64 return 0;
65 }
66
67
68 ret = wait_for_completion_timeout(&info->cmd_complete,
69 msecs_to_jiffies(RPMSG_TIMEOUT));
70 if (!ret) {
71 dev_err(&rpdev->dev, "rpmsg_send cmd %d timeout!\n",
72 msg->s_msg.header.cmd);
73 mutex_unlock(&info->msg_lock);
74 return -ETIMEDOUT;
75 }
76
77 memcpy(&msg->r_msg, &info->r_msg, sizeof(struct rpmsg_r_msg));
78 memcpy(&info->msg[msg->r_msg.header.cmd].r_msg,
79 &msg->r_msg, sizeof(struct rpmsg_r_msg));
80
81
82
83
84
85
86
87
88 switch (msg->s_msg.header.cmd) {
89 case TX_TERMINATE:
90 info->msg[TX_POINTER].r_msg.param.buffer_offset = 0;
91 break;
92 case RX_TERMINATE:
93 info->msg[RX_POINTER].r_msg.param.buffer_offset = 0;
94 break;
95 default:
96 break;
97 }
98
99 dev_dbg(&rpdev->dev, "cmd:%d, resp %d\n", msg->s_msg.header.cmd,
100 info->r_msg.param.resp);
101
102 mutex_unlock(&info->msg_lock);
103
104 return 0;
105}
106
107static int imx_rpmsg_insert_workqueue(struct snd_pcm_substream *substream,
108 struct rpmsg_msg *msg,
109 struct rpmsg_info *info)
110{
111 unsigned long flags;
112 int ret = 0;
113
114
115
116
117
118 spin_lock_irqsave(&info->wq_lock, flags);
119 if (info->work_write_index != info->work_read_index) {
120 int index = info->work_write_index;
121
122 memcpy(&info->work_list[index].msg, msg,
123 sizeof(struct rpmsg_s_msg));
124
125 queue_work(info->rpmsg_wq, &info->work_list[index].work);
126 info->work_write_index++;
127 info->work_write_index %= WORK_MAX_NUM;
128 } else {
129 info->msg_drop_count[substream->stream]++;
130 ret = -EPIPE;
131 }
132 spin_unlock_irqrestore(&info->wq_lock, flags);
133
134 return ret;
135}
136
137static int imx_rpmsg_pcm_hw_params(struct snd_soc_component *component,
138 struct snd_pcm_substream *substream,
139 struct snd_pcm_hw_params *params)
140{
141 struct rpmsg_info *info = dev_get_drvdata(component->dev);
142 struct snd_pcm_runtime *runtime = substream->runtime;
143 struct rpmsg_msg *msg;
144 int ret = 0;
145
146 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
147 msg = &info->msg[TX_HW_PARAM];
148 msg->s_msg.header.cmd = TX_HW_PARAM;
149 } else {
150 msg = &info->msg[RX_HW_PARAM];
151 msg->s_msg.header.cmd = RX_HW_PARAM;
152 }
153
154 msg->s_msg.param.rate = params_rate(params);
155
156 switch (params_format(params)) {
157 case SNDRV_PCM_FORMAT_S16_LE:
158 msg->s_msg.param.format = RPMSG_S16_LE;
159 break;
160 case SNDRV_PCM_FORMAT_S24_LE:
161 msg->s_msg.param.format = RPMSG_S24_LE;
162 break;
163 case SNDRV_PCM_FORMAT_DSD_U16_LE:
164 msg->s_msg.param.format = RPMSG_DSD_U16_LE;
165 break;
166 case SNDRV_PCM_FORMAT_DSD_U32_LE:
167 msg->s_msg.param.format = RPMSG_DSD_U32_LE;
168 break;
169 default:
170 msg->s_msg.param.format = RPMSG_S32_LE;
171 break;
172 }
173
174 switch (params_channels(params)) {
175 case 1:
176 msg->s_msg.param.channels = RPMSG_CH_LEFT;
177 break;
178 case 2:
179 msg->s_msg.param.channels = RPMSG_CH_STEREO;
180 break;
181 default:
182 ret = -EINVAL;
183 break;
184 }
185
186 snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
187 runtime->dma_bytes = params_buffer_bytes(params);
188
189 info->send_message(msg, info);
190
191 return ret;
192}
193
194static int imx_rpmsg_pcm_hw_free(struct snd_soc_component *component,
195 struct snd_pcm_substream *substream)
196{
197 snd_pcm_set_runtime_buffer(substream, NULL);
198 return 0;
199}
200
201static snd_pcm_uframes_t imx_rpmsg_pcm_pointer(struct snd_soc_component *component,
202 struct snd_pcm_substream *substream)
203{
204 struct rpmsg_info *info = dev_get_drvdata(component->dev);
205 struct rpmsg_msg *msg;
206 unsigned int pos = 0;
207 int buffer_tail = 0;
208
209 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
210 msg = &info->msg[TX_PERIOD_DONE + MSG_TYPE_A_NUM];
211 else
212 msg = &info->msg[RX_PERIOD_DONE + MSG_TYPE_A_NUM];
213
214 buffer_tail = msg->r_msg.param.buffer_tail;
215 pos = buffer_tail * snd_pcm_lib_period_bytes(substream);
216
217 return bytes_to_frames(substream->runtime, pos);
218}
219
220static void imx_rpmsg_timer_callback(struct timer_list *t)
221{
222 struct stream_timer *stream_timer =
223 from_timer(stream_timer, t, timer);
224 struct snd_pcm_substream *substream = stream_timer->substream;
225 struct rpmsg_info *info = stream_timer->info;
226 struct rpmsg_msg *msg;
227
228 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
229 msg = &info->msg[TX_PERIOD_DONE + MSG_TYPE_A_NUM];
230 msg->s_msg.header.cmd = TX_PERIOD_DONE;
231 } else {
232 msg = &info->msg[RX_PERIOD_DONE + MSG_TYPE_A_NUM];
233 msg->s_msg.header.cmd = RX_PERIOD_DONE;
234 }
235
236 imx_rpmsg_insert_workqueue(substream, msg, info);
237}
238
239static int imx_rpmsg_pcm_open(struct snd_soc_component *component,
240 struct snd_pcm_substream *substream)
241{
242 struct rpmsg_info *info = dev_get_drvdata(component->dev);
243 struct rpmsg_msg *msg;
244 int ret = 0;
245 int cmd;
246
247 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
248 msg = &info->msg[TX_OPEN];
249 msg->s_msg.header.cmd = TX_OPEN;
250
251
252 cmd = TX_PERIOD_DONE + MSG_TYPE_A_NUM;
253 info->msg[cmd].s_msg.param.buffer_tail = 0;
254 info->msg[cmd].r_msg.param.buffer_tail = 0;
255 info->msg[TX_POINTER].r_msg.param.buffer_offset = 0;
256
257 } else {
258 msg = &info->msg[RX_OPEN];
259 msg->s_msg.header.cmd = RX_OPEN;
260
261
262 cmd = RX_PERIOD_DONE + MSG_TYPE_A_NUM;
263 info->msg[cmd].s_msg.param.buffer_tail = 0;
264 info->msg[cmd].r_msg.param.buffer_tail = 0;
265 info->msg[RX_POINTER].r_msg.param.buffer_offset = 0;
266 }
267
268 info->send_message(msg, info);
269
270 imx_rpmsg_pcm_hardware.period_bytes_max =
271 imx_rpmsg_pcm_hardware.buffer_bytes_max / 2;
272
273 snd_soc_set_runtime_hwparams(substream, &imx_rpmsg_pcm_hardware);
274
275 ret = snd_pcm_hw_constraint_integer(substream->runtime,
276 SNDRV_PCM_HW_PARAM_PERIODS);
277 if (ret < 0)
278 return ret;
279
280 info->msg_drop_count[substream->stream] = 0;
281
282
283 info->stream_timer[substream->stream].info = info;
284 info->stream_timer[substream->stream].substream = substream;
285 timer_setup(&info->stream_timer[substream->stream].timer,
286 imx_rpmsg_timer_callback, 0);
287 return ret;
288}
289
290static int imx_rpmsg_pcm_close(struct snd_soc_component *component,
291 struct snd_pcm_substream *substream)
292{
293 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
294 struct rpmsg_info *info = dev_get_drvdata(component->dev);
295 struct rpmsg_msg *msg;
296 int ret = 0;
297
298
299 flush_workqueue(info->rpmsg_wq);
300
301 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
302 msg = &info->msg[TX_CLOSE];
303 msg->s_msg.header.cmd = TX_CLOSE;
304 } else {
305 msg = &info->msg[RX_CLOSE];
306 msg->s_msg.header.cmd = RX_CLOSE;
307 }
308
309 info->send_message(msg, info);
310
311 del_timer(&info->stream_timer[substream->stream].timer);
312
313 rtd->dai_link->ignore_suspend = 0;
314
315 if (info->msg_drop_count[substream->stream])
316 dev_warn(rtd->dev, "Msg is dropped!, number is %d\n",
317 info->msg_drop_count[substream->stream]);
318
319 return ret;
320}
321
322static int imx_rpmsg_pcm_prepare(struct snd_soc_component *component,
323 struct snd_pcm_substream *substream)
324{
325 struct snd_pcm_runtime *runtime = substream->runtime;
326 struct snd_soc_pcm_runtime *rtd = substream->private_data;
327 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
328 struct fsl_rpmsg *rpmsg = dev_get_drvdata(cpu_dai->dev);
329
330
331
332
333
334 if ((runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
335 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) &&
336 rpmsg->enable_lpa) {
337
338
339
340
341 rtd->dai_link->ignore_suspend = 1;
342 rpmsg->force_lpa = 1;
343 } else {
344 rpmsg->force_lpa = 0;
345 }
346
347 return 0;
348}
349
350static int imx_rpmsg_pcm_mmap(struct snd_soc_component *component,
351 struct snd_pcm_substream *substream,
352 struct vm_area_struct *vma)
353{
354 struct snd_pcm_runtime *runtime = substream->runtime;
355
356 return dma_mmap_wc(substream->pcm->card->dev, vma,
357 runtime->dma_area,
358 runtime->dma_addr,
359 runtime->dma_bytes);
360}
361
362static void imx_rpmsg_pcm_dma_complete(void *arg)
363{
364 struct snd_pcm_substream *substream = arg;
365
366 snd_pcm_period_elapsed(substream);
367}
368
369static int imx_rpmsg_prepare_and_submit(struct snd_soc_component *component,
370 struct snd_pcm_substream *substream)
371{
372 struct rpmsg_info *info = dev_get_drvdata(component->dev);
373 struct rpmsg_msg *msg;
374
375 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
376 msg = &info->msg[TX_BUFFER];
377 msg->s_msg.header.cmd = TX_BUFFER;
378 } else {
379 msg = &info->msg[RX_BUFFER];
380 msg->s_msg.header.cmd = RX_BUFFER;
381 }
382
383
384 msg->s_msg.param.buffer_addr = substream->runtime->dma_addr;
385 msg->s_msg.param.buffer_size = snd_pcm_lib_buffer_bytes(substream);
386 msg->s_msg.param.period_size = snd_pcm_lib_period_bytes(substream);
387 msg->s_msg.param.buffer_tail = 0;
388
389 info->num_period[substream->stream] = msg->s_msg.param.buffer_size /
390 msg->s_msg.param.period_size;
391
392 info->callback[substream->stream] = imx_rpmsg_pcm_dma_complete;
393 info->callback_param[substream->stream] = substream;
394
395 return imx_rpmsg_insert_workqueue(substream, msg, info);
396}
397
398static int imx_rpmsg_async_issue_pending(struct snd_soc_component *component,
399 struct snd_pcm_substream *substream)
400{
401 struct rpmsg_info *info = dev_get_drvdata(component->dev);
402 struct rpmsg_msg *msg;
403
404 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
405 msg = &info->msg[TX_START];
406 msg->s_msg.header.cmd = TX_START;
407 } else {
408 msg = &info->msg[RX_START];
409 msg->s_msg.header.cmd = RX_START;
410 }
411
412 return imx_rpmsg_insert_workqueue(substream, msg, info);
413}
414
415static int imx_rpmsg_restart(struct snd_soc_component *component,
416 struct snd_pcm_substream *substream)
417{
418 struct rpmsg_info *info = dev_get_drvdata(component->dev);
419 struct rpmsg_msg *msg;
420
421 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
422 msg = &info->msg[TX_RESTART];
423 msg->s_msg.header.cmd = TX_RESTART;
424 } else {
425 msg = &info->msg[RX_RESTART];
426 msg->s_msg.header.cmd = RX_RESTART;
427 }
428
429 return imx_rpmsg_insert_workqueue(substream, msg, info);
430}
431
432static int imx_rpmsg_pause(struct snd_soc_component *component,
433 struct snd_pcm_substream *substream)
434{
435 struct rpmsg_info *info = dev_get_drvdata(component->dev);
436 struct rpmsg_msg *msg;
437
438 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
439 msg = &info->msg[TX_PAUSE];
440 msg->s_msg.header.cmd = TX_PAUSE;
441 } else {
442 msg = &info->msg[RX_PAUSE];
443 msg->s_msg.header.cmd = RX_PAUSE;
444 }
445
446 return imx_rpmsg_insert_workqueue(substream, msg, info);
447}
448
449static int imx_rpmsg_terminate_all(struct snd_soc_component *component,
450 struct snd_pcm_substream *substream)
451{
452 struct rpmsg_info *info = dev_get_drvdata(component->dev);
453 struct rpmsg_msg *msg;
454 int cmd;
455
456 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
457 msg = &info->msg[TX_TERMINATE];
458 msg->s_msg.header.cmd = TX_TERMINATE;
459
460 cmd = TX_PERIOD_DONE + MSG_TYPE_A_NUM;
461 info->msg[cmd].s_msg.param.buffer_tail = 0;
462 info->msg[cmd].r_msg.param.buffer_tail = 0;
463 info->msg[TX_POINTER].r_msg.param.buffer_offset = 0;
464 } else {
465 msg = &info->msg[RX_TERMINATE];
466 msg->s_msg.header.cmd = RX_TERMINATE;
467
468 cmd = RX_PERIOD_DONE + MSG_TYPE_A_NUM;
469 info->msg[cmd].s_msg.param.buffer_tail = 0;
470 info->msg[cmd].r_msg.param.buffer_tail = 0;
471 info->msg[RX_POINTER].r_msg.param.buffer_offset = 0;
472 }
473
474 del_timer(&info->stream_timer[substream->stream].timer);
475
476 return imx_rpmsg_insert_workqueue(substream, msg, info);
477}
478
479static int imx_rpmsg_pcm_trigger(struct snd_soc_component *component,
480 struct snd_pcm_substream *substream, int cmd)
481{
482 struct snd_pcm_runtime *runtime = substream->runtime;
483 struct snd_soc_pcm_runtime *rtd = substream->private_data;
484 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
485 struct fsl_rpmsg *rpmsg = dev_get_drvdata(cpu_dai->dev);
486 int ret = 0;
487
488 switch (cmd) {
489 case SNDRV_PCM_TRIGGER_START:
490 ret = imx_rpmsg_prepare_and_submit(component, substream);
491 if (ret)
492 return ret;
493 ret = imx_rpmsg_async_issue_pending(component, substream);
494 break;
495 case SNDRV_PCM_TRIGGER_RESUME:
496 if (rpmsg->force_lpa)
497 break;
498 fallthrough;
499 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
500 ret = imx_rpmsg_restart(component, substream);
501 break;
502 case SNDRV_PCM_TRIGGER_SUSPEND:
503 if (!rpmsg->force_lpa) {
504 if (runtime->info & SNDRV_PCM_INFO_PAUSE)
505 ret = imx_rpmsg_pause(component, substream);
506 else
507 ret = imx_rpmsg_terminate_all(component, substream);
508 }
509 break;
510 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
511 ret = imx_rpmsg_pause(component, substream);
512 break;
513 case SNDRV_PCM_TRIGGER_STOP:
514 ret = imx_rpmsg_terminate_all(component, substream);
515 break;
516 default:
517 return -EINVAL;
518 }
519
520 if (ret)
521 return ret;
522
523 return 0;
524}
525
526
527
528
529
530
531
532
533static int imx_rpmsg_pcm_ack(struct snd_soc_component *component,
534 struct snd_pcm_substream *substream)
535{
536 struct snd_pcm_runtime *runtime = substream->runtime;
537 struct snd_soc_pcm_runtime *rtd = substream->private_data;
538 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
539 struct fsl_rpmsg *rpmsg = dev_get_drvdata(cpu_dai->dev);
540 struct rpmsg_info *info = dev_get_drvdata(component->dev);
541 snd_pcm_uframes_t period_size = runtime->period_size;
542 snd_pcm_sframes_t avail;
543 struct timer_list *timer;
544 struct rpmsg_msg *msg;
545 unsigned long flags;
546 int buffer_tail = 0;
547 int written_num;
548
549 if (!rpmsg->force_lpa)
550 return 0;
551
552 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
553 msg = &info->msg[TX_PERIOD_DONE + MSG_TYPE_A_NUM];
554 msg->s_msg.header.cmd = TX_PERIOD_DONE;
555 } else {
556 msg = &info->msg[RX_PERIOD_DONE + MSG_TYPE_A_NUM];
557 msg->s_msg.header.cmd = RX_PERIOD_DONE;
558 }
559
560 msg->s_msg.header.type = MSG_TYPE_C;
561
562 buffer_tail = (frames_to_bytes(runtime, runtime->control->appl_ptr) %
563 snd_pcm_lib_buffer_bytes(substream));
564 buffer_tail = buffer_tail / snd_pcm_lib_period_bytes(substream);
565
566
567 if (buffer_tail != msg->s_msg.param.buffer_tail) {
568 written_num = buffer_tail - msg->s_msg.param.buffer_tail;
569 if (written_num < 0)
570 written_num += runtime->periods;
571
572 msg->s_msg.param.buffer_tail = buffer_tail;
573
574
575 spin_lock_irqsave(&info->lock[substream->stream], flags);
576 memcpy(&info->notify[substream->stream], msg,
577 sizeof(struct rpmsg_s_msg));
578 info->notify_updated[substream->stream] = true;
579 spin_unlock_irqrestore(&info->lock[substream->stream], flags);
580
581 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
582 avail = snd_pcm_playback_hw_avail(runtime);
583 else
584 avail = snd_pcm_capture_hw_avail(runtime);
585
586 timer = &info->stream_timer[substream->stream].timer;
587
588
589
590
591
592
593
594
595
596
597
598
599 if ((avail - written_num * period_size) <= period_size) {
600 imx_rpmsg_insert_workqueue(substream, msg, info);
601 } else if (rpmsg->force_lpa && !timer_pending(timer)) {
602 int time_msec;
603
604 time_msec = (int)(runtime->period_size * 1000 / runtime->rate);
605 mod_timer(timer, jiffies + msecs_to_jiffies(time_msec));
606 }
607 }
608
609 return 0;
610}
611
612static int imx_rpmsg_pcm_preallocate_dma_buffer(struct snd_pcm *pcm,
613 int stream, int size)
614{
615 struct snd_pcm_substream *substream = pcm->streams[stream].substream;
616 struct snd_dma_buffer *buf = &substream->dma_buffer;
617
618 buf->dev.type = SNDRV_DMA_TYPE_DEV;
619 buf->dev.dev = pcm->card->dev;
620 buf->private_data = NULL;
621 buf->area = dma_alloc_wc(pcm->card->dev, size,
622 &buf->addr, GFP_KERNEL);
623 if (!buf->area)
624 return -ENOMEM;
625
626 buf->bytes = size;
627 return 0;
628}
629
630static void imx_rpmsg_pcm_free_dma_buffers(struct snd_soc_component *component,
631 struct snd_pcm *pcm)
632{
633 struct snd_pcm_substream *substream;
634 struct snd_dma_buffer *buf;
635 int stream;
636
637 for (stream = SNDRV_PCM_STREAM_PLAYBACK;
638 stream < SNDRV_PCM_STREAM_LAST; stream++) {
639 substream = pcm->streams[stream].substream;
640 if (!substream)
641 continue;
642
643 buf = &substream->dma_buffer;
644 if (!buf->area)
645 continue;
646
647 dma_free_wc(pcm->card->dev, buf->bytes,
648 buf->area, buf->addr);
649 buf->area = NULL;
650 }
651}
652
653static int imx_rpmsg_pcm_new(struct snd_soc_component *component,
654 struct snd_soc_pcm_runtime *rtd)
655{
656 struct snd_card *card = rtd->card->snd_card;
657 struct snd_pcm *pcm = rtd->pcm;
658 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
659 struct fsl_rpmsg *rpmsg = dev_get_drvdata(cpu_dai->dev);
660 int ret;
661
662 ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
663 if (ret)
664 return ret;
665
666 if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
667 ret = imx_rpmsg_pcm_preallocate_dma_buffer(pcm, SNDRV_PCM_STREAM_PLAYBACK,
668 rpmsg->buffer_size);
669 if (ret)
670 goto out;
671 }
672
673 if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
674 ret = imx_rpmsg_pcm_preallocate_dma_buffer(pcm, SNDRV_PCM_STREAM_CAPTURE,
675 rpmsg->buffer_size);
676 if (ret)
677 goto out;
678 }
679
680 imx_rpmsg_pcm_hardware.buffer_bytes_max = rpmsg->buffer_size;
681out:
682
683 if (ret)
684 imx_rpmsg_pcm_free_dma_buffers(component, pcm);
685
686 return ret;
687}
688
689static const struct snd_soc_component_driver imx_rpmsg_soc_component = {
690 .name = IMX_PCM_DRV_NAME,
691 .pcm_construct = imx_rpmsg_pcm_new,
692 .pcm_destruct = imx_rpmsg_pcm_free_dma_buffers,
693 .open = imx_rpmsg_pcm_open,
694 .close = imx_rpmsg_pcm_close,
695 .hw_params = imx_rpmsg_pcm_hw_params,
696 .hw_free = imx_rpmsg_pcm_hw_free,
697 .trigger = imx_rpmsg_pcm_trigger,
698 .pointer = imx_rpmsg_pcm_pointer,
699 .mmap = imx_rpmsg_pcm_mmap,
700 .ack = imx_rpmsg_pcm_ack,
701 .prepare = imx_rpmsg_pcm_prepare,
702};
703
704static void imx_rpmsg_pcm_work(struct work_struct *work)
705{
706 struct work_of_rpmsg *work_of_rpmsg;
707 bool is_notification = false;
708 struct rpmsg_info *info;
709 struct rpmsg_msg msg;
710 unsigned long flags;
711
712 work_of_rpmsg = container_of(work, struct work_of_rpmsg, work);
713 info = work_of_rpmsg->info;
714
715
716
717
718
719
720
721 spin_lock_irqsave(&info->lock[TX], flags);
722 if (info->notify_updated[TX]) {
723 memcpy(&msg, &info->notify[TX], sizeof(struct rpmsg_s_msg));
724 info->notify_updated[TX] = false;
725 spin_unlock_irqrestore(&info->lock[TX], flags);
726 info->send_message(&msg, info);
727 } else {
728 spin_unlock_irqrestore(&info->lock[TX], flags);
729 }
730
731 spin_lock_irqsave(&info->lock[RX], flags);
732 if (info->notify_updated[RX]) {
733 memcpy(&msg, &info->notify[RX], sizeof(struct rpmsg_s_msg));
734 info->notify_updated[RX] = false;
735 spin_unlock_irqrestore(&info->lock[RX], flags);
736 info->send_message(&msg, info);
737 } else {
738 spin_unlock_irqrestore(&info->lock[RX], flags);
739 }
740
741
742 if (work_of_rpmsg->msg.s_msg.header.type == MSG_TYPE_C &&
743 (work_of_rpmsg->msg.s_msg.header.cmd == TX_PERIOD_DONE ||
744 work_of_rpmsg->msg.s_msg.header.cmd == RX_PERIOD_DONE))
745 is_notification = true;
746
747 if (!is_notification)
748 info->send_message(&work_of_rpmsg->msg, info);
749
750
751 spin_lock_irqsave(&info->wq_lock, flags);
752 info->work_read_index++;
753 info->work_read_index %= WORK_MAX_NUM;
754 spin_unlock_irqrestore(&info->wq_lock, flags);
755}
756
757static int imx_rpmsg_pcm_probe(struct platform_device *pdev)
758{
759 struct snd_soc_component *component;
760 struct rpmsg_info *info;
761 int ret, i;
762
763 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
764 if (!info)
765 return -ENOMEM;
766
767 platform_set_drvdata(pdev, info);
768
769 info->rpdev = container_of(pdev->dev.parent, struct rpmsg_device, dev);
770 info->dev = &pdev->dev;
771
772 info->rpmsg_wq = alloc_ordered_workqueue("rpmsg_audio",
773 WQ_HIGHPRI |
774 WQ_UNBOUND |
775 WQ_FREEZABLE);
776 if (!info->rpmsg_wq) {
777 dev_err(&pdev->dev, "workqueue create failed\n");
778 return -ENOMEM;
779 }
780
781
782 info->work_write_index = 1;
783 info->send_message = imx_rpmsg_pcm_send_message;
784
785 for (i = 0; i < WORK_MAX_NUM; i++) {
786 INIT_WORK(&info->work_list[i].work, imx_rpmsg_pcm_work);
787 info->work_list[i].info = info;
788 }
789
790
791 for (i = 0; i < MSG_MAX_NUM; i++) {
792 info->msg[i].s_msg.header.cate = IMX_RPMSG_AUDIO;
793 info->msg[i].s_msg.header.major = IMX_RMPSG_MAJOR;
794 info->msg[i].s_msg.header.minor = IMX_RMPSG_MINOR;
795 info->msg[i].s_msg.header.type = MSG_TYPE_A;
796 info->msg[i].s_msg.param.audioindex = 0;
797 }
798
799 init_completion(&info->cmd_complete);
800 mutex_init(&info->msg_lock);
801 spin_lock_init(&info->lock[TX]);
802 spin_lock_init(&info->lock[RX]);
803 spin_lock_init(&info->wq_lock);
804
805 ret = devm_snd_soc_register_component(&pdev->dev,
806 &imx_rpmsg_soc_component,
807 NULL, 0);
808 if (ret)
809 goto fail;
810
811 component = snd_soc_lookup_component(&pdev->dev, IMX_PCM_DRV_NAME);
812 if (!component) {
813 ret = -EINVAL;
814 goto fail;
815 }
816#ifdef CONFIG_DEBUG_FS
817 component->debugfs_prefix = "rpmsg";
818#endif
819
820 return 0;
821
822fail:
823 if (info->rpmsg_wq)
824 destroy_workqueue(info->rpmsg_wq);
825
826 return ret;
827}
828
829static int imx_rpmsg_pcm_remove(struct platform_device *pdev)
830{
831 struct rpmsg_info *info = platform_get_drvdata(pdev);
832
833 if (info->rpmsg_wq)
834 destroy_workqueue(info->rpmsg_wq);
835
836 return 0;
837}
838
839#ifdef CONFIG_PM
840static int imx_rpmsg_pcm_runtime_resume(struct device *dev)
841{
842 struct rpmsg_info *info = dev_get_drvdata(dev);
843
844 cpu_latency_qos_add_request(&info->pm_qos_req, 0);
845
846 return 0;
847}
848
849static int imx_rpmsg_pcm_runtime_suspend(struct device *dev)
850{
851 struct rpmsg_info *info = dev_get_drvdata(dev);
852
853 cpu_latency_qos_remove_request(&info->pm_qos_req);
854
855 return 0;
856}
857#endif
858
859#ifdef CONFIG_PM_SLEEP
860static int imx_rpmsg_pcm_suspend(struct device *dev)
861{
862 struct rpmsg_info *info = dev_get_drvdata(dev);
863 struct rpmsg_msg *rpmsg_tx;
864 struct rpmsg_msg *rpmsg_rx;
865
866 rpmsg_tx = &info->msg[TX_SUSPEND];
867 rpmsg_rx = &info->msg[RX_SUSPEND];
868
869 rpmsg_tx->s_msg.header.cmd = TX_SUSPEND;
870 info->send_message(rpmsg_tx, info);
871
872 rpmsg_rx->s_msg.header.cmd = RX_SUSPEND;
873 info->send_message(rpmsg_rx, info);
874
875 return 0;
876}
877
878static int imx_rpmsg_pcm_resume(struct device *dev)
879{
880 struct rpmsg_info *info = dev_get_drvdata(dev);
881 struct rpmsg_msg *rpmsg_tx;
882 struct rpmsg_msg *rpmsg_rx;
883
884 rpmsg_tx = &info->msg[TX_RESUME];
885 rpmsg_rx = &info->msg[RX_RESUME];
886
887 rpmsg_tx->s_msg.header.cmd = TX_RESUME;
888 info->send_message(rpmsg_tx, info);
889
890 rpmsg_rx->s_msg.header.cmd = RX_RESUME;
891 info->send_message(rpmsg_rx, info);
892
893 return 0;
894}
895#endif
896
897static const struct dev_pm_ops imx_rpmsg_pcm_pm_ops = {
898 SET_RUNTIME_PM_OPS(imx_rpmsg_pcm_runtime_suspend,
899 imx_rpmsg_pcm_runtime_resume,
900 NULL)
901 SET_SYSTEM_SLEEP_PM_OPS(imx_rpmsg_pcm_suspend,
902 imx_rpmsg_pcm_resume)
903};
904
905static struct platform_driver imx_pcm_rpmsg_driver = {
906 .probe = imx_rpmsg_pcm_probe,
907 .remove = imx_rpmsg_pcm_remove,
908 .driver = {
909 .name = IMX_PCM_DRV_NAME,
910 .pm = &imx_rpmsg_pcm_pm_ops,
911 },
912};
913module_platform_driver(imx_pcm_rpmsg_driver);
914
915MODULE_DESCRIPTION("Freescale SoC Audio RPMSG PCM interface");
916MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
917MODULE_ALIAS("platform:" IMX_PCM_DRV_NAME);
918MODULE_LICENSE("GPL v2");
919
