1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2021, Linaro Limited
3
4 #include <linux/init.h>
5 #include <linux/err.h>
6 #include <linux/module.h>
7 #include <linux/of.h>
8 #include <linux/platform_device.h>
9 #include <linux/slab.h>
10 #include <sound/soc.h>
11 #include <sound/soc-dapm.h>
12 #include <linux/spinlock.h>
13 #include <sound/pcm.h>
14 #include <asm/div64.h>
15 #include <asm/dma.h>
16 #include <linux/dma-mapping.h>
17 #include <sound/pcm_params.h>
18 #include "q6apm.h"
19
20 #define DRV_NAME "q6apm-dai"
21
22 #define PLAYBACK_MIN_NUM_PERIODS 2
23 #define PLAYBACK_MAX_NUM_PERIODS 8
24 #define PLAYBACK_MAX_PERIOD_SIZE 65536
25 #define PLAYBACK_MIN_PERIOD_SIZE 128
26 #define CAPTURE_MIN_NUM_PERIODS 2
27 #define CAPTURE_MAX_NUM_PERIODS 8
28 #define CAPTURE_MAX_PERIOD_SIZE 65536
29 #define CAPTURE_MIN_PERIOD_SIZE 6144
30 #define BUFFER_BYTES_MAX (PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE)
31 #define BUFFER_BYTES_MIN (PLAYBACK_MIN_NUM_PERIODS * PLAYBACK_MIN_PERIOD_SIZE)
32 #define COMPR_PLAYBACK_MAX_FRAGMENT_SIZE (128 * 1024)
33 #define COMPR_PLAYBACK_MAX_NUM_FRAGMENTS (16 * 4)
34 #define COMPR_PLAYBACK_MIN_FRAGMENT_SIZE (8 * 1024)
35 #define COMPR_PLAYBACK_MIN_NUM_FRAGMENTS (4)
36 #define SID_MASK_DEFAULT 0xF
37
38 static const struct snd_compr_codec_caps q6apm_compr_caps = {
39 .num_descriptors = 1,
40 .descriptor[0].max_ch = 2,
41 .descriptor[0].sample_rates = { 8000, 11025, 12000, 16000, 22050,
42 24000, 32000, 44100, 48000, 88200,
43 96000, 176400, 192000 },
44 .descriptor[0].num_sample_rates = 13,
45 .descriptor[0].bit_rate[0] = 320,
46 .descriptor[0].bit_rate[1] = 128,
47 .descriptor[0].num_bitrates = 2,
48 .descriptor[0].profiles = 0,
49 .descriptor[0].modes = SND_AUDIOCHANMODE_MP3_STEREO,
50 .descriptor[0].formats = 0,
51 };
52
53 enum stream_state {
54 Q6APM_STREAM_IDLE = 0,
55 Q6APM_STREAM_STOPPED,
56 Q6APM_STREAM_RUNNING,
57 };
58
59 struct q6apm_dai_rtd {
60 struct snd_pcm_substream *substream;
61 struct snd_compr_stream *cstream;
62 struct snd_codec codec;
63 struct snd_compr_params codec_param;
64 struct snd_dma_buffer dma_buffer;
65 phys_addr_t phys;
66 unsigned int pcm_size;
67 unsigned int pcm_count;
68 unsigned int periods;
69 uint64_t bytes_sent;
70 uint64_t bytes_received;
71 uint64_t copied_total;
72 uint16_t bits_per_sample;
73 snd_pcm_uframes_t queue_ptr;
74 bool next_track;
75 enum stream_state state;
76 struct q6apm_graph *graph;
77 spinlock_t lock;
78 bool notify_on_drain;
79 };
80
81 struct q6apm_dai_data {
82 long long sid;
83 };
84
85 static const struct snd_pcm_hardware q6apm_dai_hardware_capture = {
86 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_BLOCK_TRANSFER |
87 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED |
88 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
89 SNDRV_PCM_INFO_NO_REWINDS | SNDRV_PCM_INFO_SYNC_APPLPTR |
90 SNDRV_PCM_INFO_BATCH),
91 .formats = (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE),
92 .rates = SNDRV_PCM_RATE_8000_48000,
93 .rate_min = 8000,
94 .rate_max = 48000,
95 .channels_min = 2,
96 .channels_max = 4,
97 .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
98 .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
99 .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE,
100 .periods_min = CAPTURE_MIN_NUM_PERIODS,
101 .periods_max = CAPTURE_MAX_NUM_PERIODS,
102 .fifo_size = 0,
103 };
104
105 static const struct snd_pcm_hardware q6apm_dai_hardware_playback = {
106 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_BLOCK_TRANSFER |
107 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED |
108 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
109 SNDRV_PCM_INFO_NO_REWINDS | SNDRV_PCM_INFO_SYNC_APPLPTR |
110 SNDRV_PCM_INFO_BATCH),
111 .formats = (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE),
112 .rates = SNDRV_PCM_RATE_8000_192000,
113 .rate_min = 8000,
114 .rate_max = 192000,
115 .channels_min = 2,
116 .channels_max = 8,
117 .buffer_bytes_max = (PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE),
118 .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE,
119 .period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE,
120 .periods_min = PLAYBACK_MIN_NUM_PERIODS,
121 .periods_max = PLAYBACK_MAX_NUM_PERIODS,
122 .fifo_size = 0,
123 };
124
event_handler(uint32_t opcode,uint32_t token,void * payload,void * priv)125 static void event_handler(uint32_t opcode, uint32_t token, void *payload, void *priv)
126 {
127 struct q6apm_dai_rtd *prtd = priv;
128 struct snd_pcm_substream *substream = prtd->substream;
129
130 switch (opcode) {
131 case APM_CLIENT_EVENT_CMD_EOS_DONE:
132 prtd->state = Q6APM_STREAM_STOPPED;
133 break;
134 case APM_CLIENT_EVENT_DATA_WRITE_DONE:
135 snd_pcm_period_elapsed(substream);
136
137 break;
138 case APM_CLIENT_EVENT_DATA_READ_DONE:
139 snd_pcm_period_elapsed(substream);
140 if (prtd->state == Q6APM_STREAM_RUNNING)
141 q6apm_read(prtd->graph);
142
143 break;
144 default:
145 break;
146 }
147 }
148
event_handler_compr(uint32_t opcode,uint32_t token,void * payload,void * priv)149 static void event_handler_compr(uint32_t opcode, uint32_t token,
150 void *payload, void *priv)
151 {
152 struct q6apm_dai_rtd *prtd = priv;
153 struct snd_compr_stream *substream = prtd->cstream;
154 uint32_t wflags = 0;
155 uint64_t avail;
156 uint32_t bytes_written, bytes_to_write;
157 bool is_last_buffer = false;
158
159 guard(spinlock_irqsave)(&prtd->lock);
160 switch (opcode) {
161 case APM_CLIENT_EVENT_CMD_EOS_DONE:
162 if (prtd->notify_on_drain) {
163 snd_compr_drain_notify(prtd->cstream);
164 prtd->notify_on_drain = false;
165 } else {
166 prtd->state = Q6APM_STREAM_STOPPED;
167 }
168 break;
169 case APM_CLIENT_EVENT_DATA_WRITE_DONE:
170 bytes_written = token >> APM_WRITE_TOKEN_LEN_SHIFT;
171 prtd->copied_total += bytes_written;
172 snd_compr_fragment_elapsed(substream);
173
174 if (prtd->state != Q6APM_STREAM_RUNNING)
175 break;
176
177 avail = prtd->bytes_received - prtd->bytes_sent;
178
179 if (avail > prtd->pcm_count) {
180 bytes_to_write = prtd->pcm_count;
181 } else {
182 if (substream->partial_drain || prtd->notify_on_drain)
183 is_last_buffer = true;
184 bytes_to_write = avail;
185 }
186
187 if (bytes_to_write) {
188 if (substream->partial_drain && is_last_buffer)
189 wflags |= APM_LAST_BUFFER_FLAG;
190
191 q6apm_write_async(prtd->graph,
192 bytes_to_write, 0, 0, wflags);
193
194 prtd->bytes_sent += bytes_to_write;
195
196 if (prtd->notify_on_drain && is_last_buffer)
197 audioreach_shared_memory_send_eos(prtd->graph);
198 }
199
200 break;
201 default:
202 break;
203 }
204 }
205
q6apm_dai_prepare(struct snd_soc_component * component,struct snd_pcm_substream * substream)206 static int q6apm_dai_prepare(struct snd_soc_component *component,
207 struct snd_pcm_substream *substream)
208 {
209 struct snd_pcm_runtime *runtime = substream->runtime;
210 struct q6apm_dai_rtd *prtd = runtime->private_data;
211 struct audioreach_module_config cfg;
212 struct device *dev = component->dev;
213 struct q6apm_dai_data *pdata;
214 int ret;
215
216 pdata = snd_soc_component_get_drvdata(component);
217 if (!pdata)
218 return -EINVAL;
219
220 if (!prtd || !prtd->graph) {
221 dev_err(dev, "%s: private data null or audio client freed\n", __func__);
222 return -EINVAL;
223 }
224
225 cfg.direction = substream->stream;
226 cfg.sample_rate = runtime->rate;
227 cfg.num_channels = runtime->channels;
228 cfg.bit_width = prtd->bits_per_sample;
229 cfg.fmt = SND_AUDIOCODEC_PCM;
230 audioreach_set_default_channel_mapping(cfg.channel_map, runtime->channels);
231
232 if (prtd->state) {
233 /* clear the previous setup if any */
234 q6apm_graph_stop(prtd->graph);
235 q6apm_unmap_memory_regions(prtd->graph, substream->stream);
236 }
237
238 prtd->pcm_count = snd_pcm_lib_period_bytes(substream);
239 /* rate and channels are sent to audio driver */
240 ret = q6apm_graph_media_format_shmem(prtd->graph, &cfg);
241 if (ret < 0) {
242 dev_err(dev, "%s: q6apm_open_write failed\n", __func__);
243 return ret;
244 }
245
246 ret = q6apm_graph_media_format_pcm(prtd->graph, &cfg);
247 if (ret < 0)
248 dev_err(dev, "%s: CMD Format block failed\n", __func__);
249
250 ret = q6apm_map_memory_regions(prtd->graph, substream->stream, prtd->phys,
251 (prtd->pcm_size / prtd->periods), prtd->periods);
252
253 if (ret < 0) {
254 dev_err(dev, "Audio Start: Buffer Allocation failed rc = %d\n", ret);
255 return -ENOMEM;
256 }
257
258 ret = q6apm_graph_prepare(prtd->graph);
259 if (ret) {
260 dev_err(dev, "Failed to prepare Graph %d\n", ret);
261 return ret;
262 }
263
264 ret = q6apm_graph_start(prtd->graph);
265 if (ret) {
266 dev_err(dev, "Failed to Start Graph %d\n", ret);
267 return ret;
268 }
269
270 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
271 int i;
272 /* Queue the buffers for Capture ONLY after graph is started */
273 for (i = 0; i < runtime->periods; i++)
274 q6apm_read(prtd->graph);
275
276 }
277
278 /* Now that graph as been prepared and started update the internal state accordingly */
279 prtd->state = Q6APM_STREAM_RUNNING;
280
281 return 0;
282 }
283
q6apm_dai_ack(struct snd_soc_component * component,struct snd_pcm_substream * substream)284 static int q6apm_dai_ack(struct snd_soc_component *component, struct snd_pcm_substream *substream)
285 {
286 struct snd_pcm_runtime *runtime = substream->runtime;
287 struct q6apm_dai_rtd *prtd = runtime->private_data;
288 int i, ret = 0, avail_periods;
289
290 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
291 avail_periods = (runtime->control->appl_ptr - prtd->queue_ptr)/runtime->period_size;
292 for (i = 0; i < avail_periods; i++) {
293 ret = q6apm_write_async(prtd->graph, prtd->pcm_count, 0, 0, NO_TIMESTAMP);
294 if (ret < 0) {
295 dev_err(component->dev, "Error queuing playback buffer %d\n", ret);
296 return ret;
297 }
298 prtd->queue_ptr += runtime->period_size;
299 }
300 }
301
302 return ret;
303 }
304
q6apm_dai_trigger(struct snd_soc_component * component,struct snd_pcm_substream * substream,int cmd)305 static int q6apm_dai_trigger(struct snd_soc_component *component,
306 struct snd_pcm_substream *substream, int cmd)
307 {
308 struct snd_pcm_runtime *runtime = substream->runtime;
309 struct q6apm_dai_rtd *prtd = runtime->private_data;
310 int ret = 0;
311
312 switch (cmd) {
313 case SNDRV_PCM_TRIGGER_START:
314 case SNDRV_PCM_TRIGGER_RESUME:
315 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
316 break;
317 case SNDRV_PCM_TRIGGER_STOP:
318 /* TODO support be handled via SoftPause Module */
319 prtd->state = Q6APM_STREAM_STOPPED;
320 break;
321 case SNDRV_PCM_TRIGGER_SUSPEND:
322 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
323 break;
324 default:
325 ret = -EINVAL;
326 break;
327 }
328
329 return ret;
330 }
331
q6apm_dai_open(struct snd_soc_component * component,struct snd_pcm_substream * substream)332 static int q6apm_dai_open(struct snd_soc_component *component,
333 struct snd_pcm_substream *substream)
334 {
335 struct snd_pcm_runtime *runtime = substream->runtime;
336 struct snd_soc_pcm_runtime *soc_prtd = snd_soc_substream_to_rtd(substream);
337 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(soc_prtd, 0);
338 struct device *dev = component->dev;
339 struct q6apm_dai_data *pdata;
340 struct q6apm_dai_rtd *prtd;
341 int graph_id, ret;
342
343 graph_id = cpu_dai->driver->id;
344
345 pdata = snd_soc_component_get_drvdata(component);
346 if (!pdata) {
347 dev_err(dev, "Drv data not found ..\n");
348 return -EINVAL;
349 }
350
351 prtd = kzalloc_obj(*prtd);
352 if (prtd == NULL)
353 return -ENOMEM;
354
355 spin_lock_init(&prtd->lock);
356 prtd->substream = substream;
357 prtd->graph = q6apm_graph_open(dev, event_handler, prtd, graph_id);
358 if (IS_ERR(prtd->graph)) {
359 dev_err(dev, "%s: Could not allocate memory\n", __func__);
360 ret = PTR_ERR(prtd->graph);
361 goto err;
362 }
363
364 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
365 runtime->hw = q6apm_dai_hardware_playback;
366 else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
367 runtime->hw = q6apm_dai_hardware_capture;
368
369 /* Ensure that buffer size is a multiple of period size */
370 ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
371 if (ret < 0) {
372 dev_err(dev, "snd_pcm_hw_constraint_integer failed\n");
373 goto err;
374 }
375
376 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
377 ret = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
378 BUFFER_BYTES_MIN, BUFFER_BYTES_MAX);
379 if (ret < 0) {
380 dev_err(dev, "constraint for buffer bytes min max ret = %d\n", ret);
381 goto err;
382 }
383 }
384
385 /* setup 10ms latency to accommodate DSP restrictions */
386 ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 480);
387 if (ret < 0) {
388 dev_err(dev, "constraint for period bytes step ret = %d\n", ret);
389 goto err;
390 }
391
392 ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 480);
393 if (ret < 0) {
394 dev_err(dev, "constraint for buffer bytes step ret = %d\n", ret);
395 goto err;
396 }
397
398 runtime->private_data = prtd;
399 runtime->dma_bytes = BUFFER_BYTES_MAX;
400 if (pdata->sid < 0)
401 prtd->phys = substream->dma_buffer.addr;
402 else
403 prtd->phys = substream->dma_buffer.addr | (pdata->sid << 32);
404
405 return 0;
406 err:
407 kfree(prtd);
408
409 return ret;
410 }
411
q6apm_dai_close(struct snd_soc_component * component,struct snd_pcm_substream * substream)412 static int q6apm_dai_close(struct snd_soc_component *component,
413 struct snd_pcm_substream *substream)
414 {
415 struct snd_pcm_runtime *runtime = substream->runtime;
416 struct q6apm_dai_rtd *prtd = runtime->private_data;
417
418 if (prtd->state) { /* only stop graph that is started */
419 q6apm_graph_stop(prtd->graph);
420 q6apm_unmap_memory_regions(prtd->graph, substream->stream);
421 }
422
423 q6apm_graph_close(prtd->graph);
424 prtd->graph = NULL;
425 kfree(prtd);
426 runtime->private_data = NULL;
427
428 return 0;
429 }
430
q6apm_dai_pointer(struct snd_soc_component * component,struct snd_pcm_substream * substream)431 static snd_pcm_uframes_t q6apm_dai_pointer(struct snd_soc_component *component,
432 struct snd_pcm_substream *substream)
433 {
434 struct snd_pcm_runtime *runtime = substream->runtime;
435 struct q6apm_dai_rtd *prtd = runtime->private_data;
436 snd_pcm_uframes_t ptr;
437
438 ptr = q6apm_get_hw_pointer(prtd->graph, substream->stream) * runtime->period_size;
439 if (ptr)
440 return ptr - 1;
441
442 return 0;
443 }
444
q6apm_dai_hw_params(struct snd_soc_component * component,struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)445 static int q6apm_dai_hw_params(struct snd_soc_component *component,
446 struct snd_pcm_substream *substream,
447 struct snd_pcm_hw_params *params)
448 {
449 struct snd_pcm_runtime *runtime = substream->runtime;
450 struct q6apm_dai_rtd *prtd = runtime->private_data;
451
452 prtd->pcm_size = params_buffer_bytes(params);
453 prtd->periods = params_periods(params);
454
455 switch (params_format(params)) {
456 case SNDRV_PCM_FORMAT_S16_LE:
457 prtd->bits_per_sample = 16;
458 break;
459 case SNDRV_PCM_FORMAT_S24_LE:
460 prtd->bits_per_sample = 24;
461 break;
462 default:
463 return -EINVAL;
464 }
465
466 return 0;
467 }
468
q6apm_dai_pcm_new(struct snd_soc_component * component,struct snd_soc_pcm_runtime * rtd)469 static int q6apm_dai_pcm_new(struct snd_soc_component *component, struct snd_soc_pcm_runtime *rtd)
470 {
471 int size = BUFFER_BYTES_MAX;
472
473 return snd_pcm_set_fixed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV, component->dev, size);
474 }
475
q6apm_dai_compr_open(struct snd_soc_component * component,struct snd_compr_stream * stream)476 static int q6apm_dai_compr_open(struct snd_soc_component *component,
477 struct snd_compr_stream *stream)
478 {
479 struct snd_soc_pcm_runtime *rtd = stream->private_data;
480 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
481 struct snd_compr_runtime *runtime = stream->runtime;
482 struct q6apm_dai_rtd *prtd;
483 struct q6apm_dai_data *pdata;
484 struct device *dev = component->dev;
485 int ret, size;
486 int graph_id;
487
488 graph_id = cpu_dai->driver->id;
489 pdata = snd_soc_component_get_drvdata(component);
490 if (!pdata)
491 return -EINVAL;
492
493 prtd = kzalloc_obj(*prtd);
494 if (prtd == NULL)
495 return -ENOMEM;
496
497 prtd->cstream = stream;
498 prtd->graph = q6apm_graph_open(dev, event_handler_compr, prtd, graph_id);
499 if (IS_ERR(prtd->graph)) {
500 ret = PTR_ERR(prtd->graph);
501 kfree(prtd);
502 return ret;
503 }
504
505 runtime->private_data = prtd;
506 runtime->dma_bytes = BUFFER_BYTES_MAX;
507 size = COMPR_PLAYBACK_MAX_FRAGMENT_SIZE * COMPR_PLAYBACK_MAX_NUM_FRAGMENTS;
508 ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, dev, size, &prtd->dma_buffer);
509 if (ret)
510 return ret;
511
512 if (pdata->sid < 0)
513 prtd->phys = prtd->dma_buffer.addr;
514 else
515 prtd->phys = prtd->dma_buffer.addr | (pdata->sid << 32);
516
517 snd_compr_set_runtime_buffer(stream, &prtd->dma_buffer);
518 spin_lock_init(&prtd->lock);
519
520 q6apm_enable_compress_module(dev, prtd->graph, true);
521 return 0;
522 }
523
q6apm_dai_compr_free(struct snd_soc_component * component,struct snd_compr_stream * stream)524 static int q6apm_dai_compr_free(struct snd_soc_component *component,
525 struct snd_compr_stream *stream)
526 {
527 struct snd_compr_runtime *runtime = stream->runtime;
528 struct q6apm_dai_rtd *prtd = runtime->private_data;
529
530 q6apm_graph_stop(prtd->graph);
531 q6apm_unmap_memory_regions(prtd->graph, SNDRV_PCM_STREAM_PLAYBACK);
532 q6apm_graph_close(prtd->graph);
533 snd_dma_free_pages(&prtd->dma_buffer);
534 prtd->graph = NULL;
535 kfree(prtd);
536 runtime->private_data = NULL;
537
538 return 0;
539 }
540
q6apm_dai_compr_get_caps(struct snd_soc_component * component,struct snd_compr_stream * stream,struct snd_compr_caps * caps)541 static int q6apm_dai_compr_get_caps(struct snd_soc_component *component,
542 struct snd_compr_stream *stream,
543 struct snd_compr_caps *caps)
544 {
545 caps->direction = SND_COMPRESS_PLAYBACK;
546 caps->min_fragment_size = COMPR_PLAYBACK_MIN_FRAGMENT_SIZE;
547 caps->max_fragment_size = COMPR_PLAYBACK_MAX_FRAGMENT_SIZE;
548 caps->min_fragments = COMPR_PLAYBACK_MIN_NUM_FRAGMENTS;
549 caps->max_fragments = COMPR_PLAYBACK_MAX_NUM_FRAGMENTS;
550 caps->num_codecs = 4;
551 caps->codecs[0] = SND_AUDIOCODEC_MP3;
552 caps->codecs[1] = SND_AUDIOCODEC_AAC;
553 caps->codecs[2] = SND_AUDIOCODEC_FLAC;
554 caps->codecs[3] = SND_AUDIOCODEC_OPUS_RAW;
555
556 return 0;
557 }
558
q6apm_dai_compr_get_codec_caps(struct snd_soc_component * component,struct snd_compr_stream * stream,struct snd_compr_codec_caps * codec)559 static int q6apm_dai_compr_get_codec_caps(struct snd_soc_component *component,
560 struct snd_compr_stream *stream,
561 struct snd_compr_codec_caps *codec)
562 {
563 switch (codec->codec) {
564 case SND_AUDIOCODEC_MP3:
565 *codec = q6apm_compr_caps;
566 break;
567 default:
568 break;
569 }
570
571 return 0;
572 }
573
q6apm_dai_compr_pointer(struct snd_soc_component * component,struct snd_compr_stream * stream,struct snd_compr_tstamp64 * tstamp)574 static int q6apm_dai_compr_pointer(struct snd_soc_component *component,
575 struct snd_compr_stream *stream,
576 struct snd_compr_tstamp64 *tstamp)
577 {
578 struct snd_compr_runtime *runtime = stream->runtime;
579 struct q6apm_dai_rtd *prtd = runtime->private_data;
580 uint64_t temp_copied_total;
581
582 guard(spinlock_irqsave)(&prtd->lock);
583 tstamp->copied_total = prtd->copied_total;
584 temp_copied_total = tstamp->copied_total;
585 tstamp->byte_offset = do_div(temp_copied_total, prtd->pcm_size);
586
587 return 0;
588 }
589
q6apm_dai_compr_trigger(struct snd_soc_component * component,struct snd_compr_stream * stream,int cmd)590 static int q6apm_dai_compr_trigger(struct snd_soc_component *component,
591 struct snd_compr_stream *stream, int cmd)
592 {
593 struct snd_compr_runtime *runtime = stream->runtime;
594 struct q6apm_dai_rtd *prtd = runtime->private_data;
595 int ret = 0;
596
597 switch (cmd) {
598 case SNDRV_PCM_TRIGGER_START:
599 case SNDRV_PCM_TRIGGER_RESUME:
600 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
601 ret = q6apm_write_async(prtd->graph, prtd->pcm_count, 0, 0, NO_TIMESTAMP);
602 break;
603 case SNDRV_PCM_TRIGGER_STOP:
604 break;
605 case SNDRV_PCM_TRIGGER_SUSPEND:
606 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
607 break;
608 case SND_COMPR_TRIGGER_NEXT_TRACK:
609 prtd->next_track = true;
610 break;
611 case SND_COMPR_TRIGGER_DRAIN:
612 case SND_COMPR_TRIGGER_PARTIAL_DRAIN:
613 prtd->notify_on_drain = true;
614 break;
615 default:
616 ret = -EINVAL;
617 break;
618 }
619
620 return ret;
621 }
622
q6apm_dai_compr_ack(struct snd_soc_component * component,struct snd_compr_stream * stream,size_t count)623 static int q6apm_dai_compr_ack(struct snd_soc_component *component, struct snd_compr_stream *stream,
624 size_t count)
625 {
626 struct snd_compr_runtime *runtime = stream->runtime;
627 struct q6apm_dai_rtd *prtd = runtime->private_data;
628
629 guard(spinlock_irqsave)(&prtd->lock);
630 prtd->bytes_received += count;
631
632 return count;
633 }
634
q6apm_dai_compr_set_params(struct snd_soc_component * component,struct snd_compr_stream * stream,struct snd_compr_params * params)635 static int q6apm_dai_compr_set_params(struct snd_soc_component *component,
636 struct snd_compr_stream *stream,
637 struct snd_compr_params *params)
638 {
639 struct snd_compr_runtime *runtime = stream->runtime;
640 struct q6apm_dai_rtd *prtd = runtime->private_data;
641 struct q6apm_dai_data *pdata;
642 struct audioreach_module_config cfg;
643 struct snd_codec *codec = ¶ms->codec;
644 int dir = stream->direction;
645 int ret;
646
647 pdata = snd_soc_component_get_drvdata(component);
648 if (!pdata)
649 return -EINVAL;
650
651 prtd->periods = runtime->fragments;
652 prtd->pcm_count = runtime->fragment_size;
653 prtd->pcm_size = runtime->fragments * runtime->fragment_size;
654 prtd->bits_per_sample = 16;
655
656 if (prtd->next_track != true) {
657 memcpy(&prtd->codec, codec, sizeof(*codec));
658
659 ret = q6apm_set_real_module_id(component->dev, prtd->graph, codec->id);
660 if (ret)
661 return ret;
662
663 cfg.direction = dir;
664 cfg.sample_rate = codec->sample_rate;
665 cfg.num_channels = 2;
666 cfg.bit_width = prtd->bits_per_sample;
667 cfg.fmt = codec->id;
668 audioreach_set_default_channel_mapping(cfg.channel_map,
669 cfg.num_channels);
670 memcpy(&cfg.codec, codec, sizeof(*codec));
671
672 ret = q6apm_graph_media_format_shmem(prtd->graph, &cfg);
673 if (ret < 0)
674 return ret;
675
676 ret = q6apm_graph_media_format_pcm(prtd->graph, &cfg);
677 if (ret)
678 return ret;
679
680 ret = q6apm_map_memory_regions(prtd->graph, SNDRV_PCM_STREAM_PLAYBACK,
681 prtd->phys, (prtd->pcm_size / prtd->periods),
682 prtd->periods);
683 if (ret < 0)
684 return -ENOMEM;
685
686 ret = q6apm_graph_prepare(prtd->graph);
687 if (ret)
688 return ret;
689
690 ret = q6apm_graph_start(prtd->graph);
691 if (ret)
692 return ret;
693
694 } else {
695 cfg.direction = dir;
696 cfg.sample_rate = codec->sample_rate;
697 cfg.num_channels = 2;
698 cfg.bit_width = prtd->bits_per_sample;
699 cfg.fmt = codec->id;
700 memcpy(&cfg.codec, codec, sizeof(*codec));
701
702 ret = audioreach_compr_set_param(prtd->graph, &cfg);
703 if (ret < 0)
704 return ret;
705 }
706 prtd->state = Q6APM_STREAM_RUNNING;
707
708 return 0;
709 }
710
q6apm_dai_compr_set_metadata(struct snd_soc_component * component,struct snd_compr_stream * stream,struct snd_compr_metadata * metadata)711 static int q6apm_dai_compr_set_metadata(struct snd_soc_component *component,
712 struct snd_compr_stream *stream,
713 struct snd_compr_metadata *metadata)
714 {
715 struct snd_compr_runtime *runtime = stream->runtime;
716 struct q6apm_dai_rtd *prtd = runtime->private_data;
717 int ret = 0;
718
719 switch (metadata->key) {
720 case SNDRV_COMPRESS_ENCODER_PADDING:
721 q6apm_remove_trailing_silence(component->dev, prtd->graph,
722 metadata->value[0]);
723 break;
724 case SNDRV_COMPRESS_ENCODER_DELAY:
725 q6apm_remove_initial_silence(component->dev, prtd->graph,
726 metadata->value[0]);
727 break;
728 default:
729 ret = -EINVAL;
730 break;
731 }
732
733 return ret;
734 }
735
q6apm_dai_compr_mmap(struct snd_soc_component * component,struct snd_compr_stream * stream,struct vm_area_struct * vma)736 static int q6apm_dai_compr_mmap(struct snd_soc_component *component,
737 struct snd_compr_stream *stream,
738 struct vm_area_struct *vma)
739 {
740 struct snd_compr_runtime *runtime = stream->runtime;
741 struct q6apm_dai_rtd *prtd = runtime->private_data;
742 struct device *dev = component->dev;
743
744 return dma_mmap_coherent(dev, vma, prtd->dma_buffer.area, prtd->dma_buffer.addr,
745 prtd->dma_buffer.bytes);
746 }
747
q6apm_compr_copy(struct snd_soc_component * component,struct snd_compr_stream * stream,char __user * buf,size_t count)748 static int q6apm_compr_copy(struct snd_soc_component *component,
749 struct snd_compr_stream *stream, char __user *buf,
750 size_t count)
751 {
752 struct snd_compr_runtime *runtime = stream->runtime;
753 struct q6apm_dai_rtd *prtd = runtime->private_data;
754 void *dstn;
755 size_t copy;
756 u32 wflags = 0;
757 u32 app_pointer;
758 uint64_t bytes_received;
759 uint64_t temp_bytes_received;
760 uint32_t bytes_to_write;
761 uint64_t avail, bytes_in_flight = 0;
762
763 bytes_received = prtd->bytes_received;
764 temp_bytes_received = bytes_received;
765
766 /**
767 * Make sure that next track data pointer is aligned at 32 bit boundary
768 * This is a Mandatory requirement from DSP data buffers alignment
769 */
770 if (prtd->next_track) {
771 bytes_received = ALIGN(prtd->bytes_received, prtd->pcm_count);
772 temp_bytes_received = bytes_received;
773 }
774
775 app_pointer = do_div(temp_bytes_received, prtd->pcm_size);
776 dstn = prtd->dma_buffer.area + app_pointer;
777
778 if (count < prtd->pcm_size - app_pointer) {
779 if (copy_from_user(dstn, buf, count))
780 return -EFAULT;
781 } else {
782 copy = prtd->pcm_size - app_pointer;
783 if (copy_from_user(dstn, buf, copy))
784 return -EFAULT;
785 if (copy_from_user(prtd->dma_buffer.area, buf + copy, count - copy))
786 return -EFAULT;
787 }
788
789 guard(spinlock_irqsave)(&prtd->lock);
790 bytes_in_flight = prtd->bytes_received - prtd->copied_total;
791
792 if (prtd->next_track) {
793 prtd->next_track = false;
794 prtd->copied_total = ALIGN(prtd->copied_total, prtd->pcm_count);
795 prtd->bytes_sent = ALIGN(prtd->bytes_sent, prtd->pcm_count);
796 }
797
798 prtd->bytes_received = bytes_received + count;
799
800 /* Kick off the data to dsp if its starving!! */
801 if (prtd->state == Q6APM_STREAM_RUNNING && (bytes_in_flight == 0)) {
802 bytes_to_write = prtd->pcm_count;
803 avail = prtd->bytes_received - prtd->bytes_sent;
804
805 if (avail < prtd->pcm_count)
806 bytes_to_write = avail;
807
808 q6apm_write_async(prtd->graph, bytes_to_write, 0, 0, wflags);
809 prtd->bytes_sent += bytes_to_write;
810 }
811
812 return count;
813 }
814
815 static const struct snd_compress_ops q6apm_dai_compress_ops = {
816 .open = q6apm_dai_compr_open,
817 .free = q6apm_dai_compr_free,
818 .get_caps = q6apm_dai_compr_get_caps,
819 .get_codec_caps = q6apm_dai_compr_get_codec_caps,
820 .pointer = q6apm_dai_compr_pointer,
821 .trigger = q6apm_dai_compr_trigger,
822 .ack = q6apm_dai_compr_ack,
823 .set_params = q6apm_dai_compr_set_params,
824 .set_metadata = q6apm_dai_compr_set_metadata,
825 .mmap = q6apm_dai_compr_mmap,
826 .copy = q6apm_compr_copy,
827 };
828
829 static const struct snd_soc_component_driver q6apm_fe_dai_component = {
830 .name = DRV_NAME,
831 .open = q6apm_dai_open,
832 .close = q6apm_dai_close,
833 .prepare = q6apm_dai_prepare,
834 .pcm_construct = q6apm_dai_pcm_new,
835 .hw_params = q6apm_dai_hw_params,
836 .pointer = q6apm_dai_pointer,
837 .trigger = q6apm_dai_trigger,
838 .ack = q6apm_dai_ack,
839 .compress_ops = &q6apm_dai_compress_ops,
840 .use_dai_pcm_id = true,
841 };
842
q6apm_dai_probe(struct platform_device * pdev)843 static int q6apm_dai_probe(struct platform_device *pdev)
844 {
845 struct device *dev = &pdev->dev;
846 struct device_node *node = dev->of_node;
847 struct q6apm_dai_data *pdata;
848 struct of_phandle_args args;
849 int rc;
850
851 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
852 if (!pdata)
853 return -ENOMEM;
854
855 rc = of_parse_phandle_with_fixed_args(node, "iommus", 1, 0, &args);
856 if (rc < 0)
857 pdata->sid = -1;
858 else
859 pdata->sid = args.args[0] & SID_MASK_DEFAULT;
860
861 dev_set_drvdata(dev, pdata);
862
863 return devm_snd_soc_register_component(dev, &q6apm_fe_dai_component, NULL, 0);
864 }
865
866 #ifdef CONFIG_OF
867 static const struct of_device_id q6apm_dai_device_id[] = {
868 { .compatible = "qcom,q6apm-dais" },
869 {},
870 };
871 MODULE_DEVICE_TABLE(of, q6apm_dai_device_id);
872 #endif
873
874 static struct platform_driver q6apm_dai_platform_driver = {
875 .driver = {
876 .name = "q6apm-dai",
877 .of_match_table = of_match_ptr(q6apm_dai_device_id),
878 },
879 .probe = q6apm_dai_probe,
880 };
881 module_platform_driver(q6apm_dai_platform_driver);
882
883 MODULE_DESCRIPTION("Q6APM dai driver");
884 MODULE_LICENSE("GPL");
885