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/platform_device.h>
8 #include <linux/slab.h>
9 #include <sound/soc.h>
10 #include <sound/soc-dapm.h>
11 #include <linux/spinlock.h>
12 #include <sound/pcm.h>
13 #include <asm/dma.h>
14 #include <linux/dma-mapping.h>
15 #include <linux/of_device.h>
16 #include <sound/pcm_params.h>
17 #include "q6apm.h"
18
19 #define DRV_NAME "q6apm-dai"
20
21 #define PLAYBACK_MIN_NUM_PERIODS 2
22 #define PLAYBACK_MAX_NUM_PERIODS 8
23 #define PLAYBACK_MAX_PERIOD_SIZE 65536
24 #define PLAYBACK_MIN_PERIOD_SIZE 128
25 #define CAPTURE_MIN_NUM_PERIODS 2
26 #define CAPTURE_MAX_NUM_PERIODS 8
27 #define CAPTURE_MAX_PERIOD_SIZE 4096
28 #define CAPTURE_MIN_PERIOD_SIZE 320
29 #define BUFFER_BYTES_MAX (PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE)
30 #define BUFFER_BYTES_MIN (PLAYBACK_MIN_NUM_PERIODS * PLAYBACK_MIN_PERIOD_SIZE)
31 #define COMPR_PLAYBACK_MAX_FRAGMENT_SIZE (128 * 1024)
32 #define COMPR_PLAYBACK_MAX_NUM_FRAGMENTS (16 * 4)
33 #define COMPR_PLAYBACK_MIN_FRAGMENT_SIZE (8 * 1024)
34 #define COMPR_PLAYBACK_MIN_NUM_FRAGMENTS (4)
35 #define SID_MASK_DEFAULT 0xF
36
37 static const struct snd_compr_codec_caps q6apm_compr_caps = {
38 .num_descriptors = 1,
39 .descriptor[0].max_ch = 2,
40 .descriptor[0].sample_rates = { 8000, 11025, 12000, 16000, 22050,
41 24000, 32000, 44100, 48000, 88200,
42 96000, 176400, 192000 },
43 .descriptor[0].num_sample_rates = 13,
44 .descriptor[0].bit_rate[0] = 320,
45 .descriptor[0].bit_rate[1] = 128,
46 .descriptor[0].num_bitrates = 2,
47 .descriptor[0].profiles = 0,
48 .descriptor[0].modes = SND_AUDIOCHANMODE_MP3_STEREO,
49 .descriptor[0].formats = 0,
50 };
51
52 enum stream_state {
53 Q6APM_STREAM_IDLE = 0,
54 Q6APM_STREAM_STOPPED,
55 Q6APM_STREAM_RUNNING,
56 };
57
58 struct q6apm_dai_rtd {
59 struct snd_pcm_substream *substream;
60 struct snd_compr_stream *cstream;
61 struct snd_codec codec;
62 struct snd_compr_params codec_param;
63 struct snd_dma_buffer dma_buffer;
64 phys_addr_t phys;
65 unsigned int pcm_size;
66 unsigned int pcm_count;
67 unsigned int pos; /* Buffer position */
68 unsigned int periods;
69 unsigned int bytes_sent;
70 unsigned int bytes_received;
71 unsigned int copied_total;
72 uint16_t bits_per_sample;
73 uint16_t source; /* Encoding source bit mask */
74 uint16_t session_id;
75 bool next_track;
76 enum stream_state state;
77 struct q6apm_graph *graph;
78 spinlock_t lock;
79 uint32_t initial_samples_drop;
80 uint32_t trailing_samples_drop;
81 bool notify_on_drain;
82 };
83
84 struct q6apm_dai_data {
85 long long sid;
86 };
87
88 static struct snd_pcm_hardware q6apm_dai_hardware_capture = {
89 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_BLOCK_TRANSFER |
90 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED |
91 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
92 SNDRV_PCM_INFO_BATCH),
93 .formats = (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE),
94 .rates = SNDRV_PCM_RATE_8000_48000,
95 .rate_min = 8000,
96 .rate_max = 48000,
97 .channels_min = 2,
98 .channels_max = 4,
99 .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
100 .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
101 .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE,
102 .periods_min = CAPTURE_MIN_NUM_PERIODS,
103 .periods_max = CAPTURE_MAX_NUM_PERIODS,
104 .fifo_size = 0,
105 };
106
107 static struct snd_pcm_hardware q6apm_dai_hardware_playback = {
108 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_BLOCK_TRANSFER |
109 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED |
110 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
111 SNDRV_PCM_INFO_BATCH),
112 .formats = (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE),
113 .rates = SNDRV_PCM_RATE_8000_192000,
114 .rate_min = 8000,
115 .rate_max = 192000,
116 .channels_min = 2,
117 .channels_max = 8,
118 .buffer_bytes_max = (PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE),
119 .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE,
120 .period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE,
121 .periods_min = PLAYBACK_MIN_NUM_PERIODS,
122 .periods_max = PLAYBACK_MAX_NUM_PERIODS,
123 .fifo_size = 0,
124 };
125
event_handler(uint32_t opcode,uint32_t token,uint32_t * payload,void * priv)126 static void event_handler(uint32_t opcode, uint32_t token, uint32_t *payload, void *priv)
127 {
128 struct q6apm_dai_rtd *prtd = priv;
129 struct snd_pcm_substream *substream = prtd->substream;
130 unsigned long flags;
131
132 switch (opcode) {
133 case APM_CLIENT_EVENT_CMD_EOS_DONE:
134 prtd->state = Q6APM_STREAM_STOPPED;
135 break;
136 case APM_CLIENT_EVENT_DATA_WRITE_DONE:
137 spin_lock_irqsave(&prtd->lock, flags);
138 prtd->pos += prtd->pcm_count;
139 spin_unlock_irqrestore(&prtd->lock, flags);
140 snd_pcm_period_elapsed(substream);
141 if (prtd->state == Q6APM_STREAM_RUNNING)
142 q6apm_write_async(prtd->graph, prtd->pcm_count, 0, 0, 0);
143
144 break;
145 case APM_CLIENT_EVENT_DATA_READ_DONE:
146 spin_lock_irqsave(&prtd->lock, flags);
147 prtd->pos += prtd->pcm_count;
148 spin_unlock_irqrestore(&prtd->lock, flags);
149 snd_pcm_period_elapsed(substream);
150 if (prtd->state == Q6APM_STREAM_RUNNING)
151 q6apm_read(prtd->graph);
152
153 break;
154 default:
155 break;
156 }
157 }
158
event_handler_compr(uint32_t opcode,uint32_t token,uint32_t * payload,void * priv)159 static void event_handler_compr(uint32_t opcode, uint32_t token,
160 uint32_t *payload, void *priv)
161 {
162 struct q6apm_dai_rtd *prtd = priv;
163 struct snd_compr_stream *substream = prtd->cstream;
164 unsigned long flags;
165 uint32_t wflags = 0;
166 uint64_t avail;
167 uint32_t bytes_written, bytes_to_write;
168 bool is_last_buffer = false;
169
170 switch (opcode) {
171 case APM_CLIENT_EVENT_CMD_EOS_DONE:
172 spin_lock_irqsave(&prtd->lock, flags);
173 if (prtd->notify_on_drain) {
174 snd_compr_drain_notify(prtd->cstream);
175 prtd->notify_on_drain = false;
176 } else {
177 prtd->state = Q6APM_STREAM_STOPPED;
178 }
179 spin_unlock_irqrestore(&prtd->lock, flags);
180 break;
181 case APM_CLIENT_EVENT_DATA_WRITE_DONE:
182 spin_lock_irqsave(&prtd->lock, flags);
183 bytes_written = token >> APM_WRITE_TOKEN_LEN_SHIFT;
184 prtd->copied_total += bytes_written;
185 snd_compr_fragment_elapsed(substream);
186
187 if (prtd->state != Q6APM_STREAM_RUNNING) {
188 spin_unlock_irqrestore(&prtd->lock, flags);
189 break;
190 }
191
192 avail = prtd->bytes_received - prtd->bytes_sent;
193
194 if (avail > prtd->pcm_count) {
195 bytes_to_write = prtd->pcm_count;
196 } else {
197 if (substream->partial_drain || prtd->notify_on_drain)
198 is_last_buffer = true;
199 bytes_to_write = avail;
200 }
201
202 if (bytes_to_write) {
203 if (substream->partial_drain && is_last_buffer)
204 wflags |= APM_LAST_BUFFER_FLAG;
205
206 q6apm_write_async(prtd->graph,
207 bytes_to_write, 0, 0, wflags);
208
209 prtd->bytes_sent += bytes_to_write;
210
211 if (prtd->notify_on_drain && is_last_buffer)
212 audioreach_shared_memory_send_eos(prtd->graph);
213 }
214
215 spin_unlock_irqrestore(&prtd->lock, flags);
216 break;
217 default:
218 break;
219 }
220 }
221
q6apm_dai_prepare(struct snd_soc_component * component,struct snd_pcm_substream * substream)222 static int q6apm_dai_prepare(struct snd_soc_component *component,
223 struct snd_pcm_substream *substream)
224 {
225 struct snd_pcm_runtime *runtime = substream->runtime;
226 struct q6apm_dai_rtd *prtd = runtime->private_data;
227 struct audioreach_module_config cfg;
228 struct device *dev = component->dev;
229 struct q6apm_dai_data *pdata;
230 int ret;
231
232 pdata = snd_soc_component_get_drvdata(component);
233 if (!pdata)
234 return -EINVAL;
235
236 if (!prtd || !prtd->graph) {
237 dev_err(dev, "%s: private data null or audio client freed\n", __func__);
238 return -EINVAL;
239 }
240
241 cfg.direction = substream->stream;
242 cfg.sample_rate = runtime->rate;
243 cfg.num_channels = runtime->channels;
244 cfg.bit_width = prtd->bits_per_sample;
245 cfg.fmt = SND_AUDIOCODEC_PCM;
246
247 if (prtd->state) {
248 /* clear the previous setup if any */
249 q6apm_graph_stop(prtd->graph);
250 q6apm_unmap_memory_regions(prtd->graph, substream->stream);
251 }
252
253 prtd->pcm_count = snd_pcm_lib_period_bytes(substream);
254 prtd->pos = 0;
255 /* rate and channels are sent to audio driver */
256 ret = q6apm_graph_media_format_shmem(prtd->graph, &cfg);
257 if (ret < 0) {
258 dev_err(dev, "%s: q6apm_open_write failed\n", __func__);
259 return ret;
260 }
261
262 ret = q6apm_graph_media_format_pcm(prtd->graph, &cfg);
263 if (ret < 0)
264 dev_err(dev, "%s: CMD Format block failed\n", __func__);
265
266 ret = q6apm_map_memory_regions(prtd->graph, substream->stream, prtd->phys,
267 (prtd->pcm_size / prtd->periods), prtd->periods);
268
269 if (ret < 0) {
270 dev_err(dev, "Audio Start: Buffer Allocation failed rc = %d\n", ret);
271 return -ENOMEM;
272 }
273
274 ret = q6apm_graph_prepare(prtd->graph);
275 if (ret) {
276 dev_err(dev, "Failed to prepare Graph %d\n", ret);
277 return ret;
278 }
279
280 ret = q6apm_graph_start(prtd->graph);
281 if (ret) {
282 dev_err(dev, "Failed to Start Graph %d\n", ret);
283 return ret;
284 }
285
286 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
287 int i;
288 /* Queue the buffers for Capture ONLY after graph is started */
289 for (i = 0; i < runtime->periods; i++)
290 q6apm_read(prtd->graph);
291
292 }
293
294 /* Now that graph as been prepared and started update the internal state accordingly */
295 prtd->state = Q6APM_STREAM_RUNNING;
296
297 return 0;
298 }
299
q6apm_dai_trigger(struct snd_soc_component * component,struct snd_pcm_substream * substream,int cmd)300 static int q6apm_dai_trigger(struct snd_soc_component *component,
301 struct snd_pcm_substream *substream, int cmd)
302 {
303 struct snd_pcm_runtime *runtime = substream->runtime;
304 struct q6apm_dai_rtd *prtd = runtime->private_data;
305 int ret = 0;
306
307 switch (cmd) {
308 case SNDRV_PCM_TRIGGER_START:
309 case SNDRV_PCM_TRIGGER_RESUME:
310 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
311 /* start writing buffers for playback only as we already queued capture buffers */
312 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
313 ret = q6apm_write_async(prtd->graph, prtd->pcm_count, 0, 0, 0);
314 break;
315 case SNDRV_PCM_TRIGGER_STOP:
316 /* TODO support be handled via SoftPause Module */
317 prtd->state = Q6APM_STREAM_STOPPED;
318 break;
319 case SNDRV_PCM_TRIGGER_SUSPEND:
320 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
321 break;
322 default:
323 ret = -EINVAL;
324 break;
325 }
326
327 return ret;
328 }
329
q6apm_dai_open(struct snd_soc_component * component,struct snd_pcm_substream * substream)330 static int q6apm_dai_open(struct snd_soc_component *component,
331 struct snd_pcm_substream *substream)
332 {
333 struct snd_pcm_runtime *runtime = substream->runtime;
334 struct snd_soc_pcm_runtime *soc_prtd = substream->private_data;
335 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(soc_prtd, 0);
336 struct device *dev = component->dev;
337 struct q6apm_dai_data *pdata;
338 struct q6apm_dai_rtd *prtd;
339 int graph_id, ret;
340
341 graph_id = cpu_dai->driver->id;
342
343 pdata = snd_soc_component_get_drvdata(component);
344 if (!pdata) {
345 dev_err(dev, "Drv data not found ..\n");
346 return -EINVAL;
347 }
348
349 prtd = kzalloc(sizeof(*prtd), GFP_KERNEL);
350 if (prtd == NULL)
351 return -ENOMEM;
352
353 spin_lock_init(&prtd->lock);
354 prtd->substream = substream;
355 prtd->graph = q6apm_graph_open(dev, (q6apm_cb)event_handler, prtd, graph_id);
356 if (IS_ERR(prtd->graph)) {
357 dev_err(dev, "%s: Could not allocate memory\n", __func__);
358 ret = PTR_ERR(prtd->graph);
359 goto err;
360 }
361
362 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
363 runtime->hw = q6apm_dai_hardware_playback;
364 else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
365 runtime->hw = q6apm_dai_hardware_capture;
366
367 /* Ensure that buffer size is a multiple of period size */
368 ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
369 if (ret < 0) {
370 dev_err(dev, "snd_pcm_hw_constraint_integer failed\n");
371 goto err;
372 }
373
374 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
375 ret = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
376 BUFFER_BYTES_MIN, BUFFER_BYTES_MAX);
377 if (ret < 0) {
378 dev_err(dev, "constraint for buffer bytes min max ret = %d\n", ret);
379 goto err;
380 }
381 }
382
383 ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
384 if (ret < 0) {
385 dev_err(dev, "constraint for period bytes step ret = %d\n", ret);
386 goto err;
387 }
388
389 ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32);
390 if (ret < 0) {
391 dev_err(dev, "constraint for buffer bytes step ret = %d\n", ret);
392 goto err;
393 }
394
395 runtime->private_data = prtd;
396 runtime->dma_bytes = BUFFER_BYTES_MAX;
397 if (pdata->sid < 0)
398 prtd->phys = substream->dma_buffer.addr;
399 else
400 prtd->phys = substream->dma_buffer.addr | (pdata->sid << 32);
401
402 return 0;
403 err:
404 kfree(prtd);
405
406 return ret;
407 }
408
q6apm_dai_close(struct snd_soc_component * component,struct snd_pcm_substream * substream)409 static int q6apm_dai_close(struct snd_soc_component *component,
410 struct snd_pcm_substream *substream)
411 {
412 struct snd_pcm_runtime *runtime = substream->runtime;
413 struct q6apm_dai_rtd *prtd = runtime->private_data;
414
415 if (prtd->state) { /* only stop graph that is started */
416 q6apm_graph_stop(prtd->graph);
417 q6apm_unmap_memory_regions(prtd->graph, substream->stream);
418 }
419
420 q6apm_graph_close(prtd->graph);
421 prtd->graph = NULL;
422 kfree(prtd);
423 runtime->private_data = NULL;
424
425 return 0;
426 }
427
q6apm_dai_pointer(struct snd_soc_component * component,struct snd_pcm_substream * substream)428 static snd_pcm_uframes_t q6apm_dai_pointer(struct snd_soc_component *component,
429 struct snd_pcm_substream *substream)
430 {
431 struct snd_pcm_runtime *runtime = substream->runtime;
432 struct q6apm_dai_rtd *prtd = runtime->private_data;
433 snd_pcm_uframes_t ptr;
434 unsigned long flags;
435
436 spin_lock_irqsave(&prtd->lock, flags);
437 if (prtd->pos == prtd->pcm_size)
438 prtd->pos = 0;
439
440 ptr = bytes_to_frames(runtime, prtd->pos);
441 spin_unlock_irqrestore(&prtd->lock, flags);
442
443 return ptr;
444 }
445
q6apm_dai_hw_params(struct snd_soc_component * component,struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)446 static int q6apm_dai_hw_params(struct snd_soc_component *component,
447 struct snd_pcm_substream *substream,
448 struct snd_pcm_hw_params *params)
449 {
450 struct snd_pcm_runtime *runtime = substream->runtime;
451 struct q6apm_dai_rtd *prtd = runtime->private_data;
452
453 prtd->pcm_size = params_buffer_bytes(params);
454 prtd->periods = params_periods(params);
455
456 switch (params_format(params)) {
457 case SNDRV_PCM_FORMAT_S16_LE:
458 prtd->bits_per_sample = 16;
459 break;
460 case SNDRV_PCM_FORMAT_S24_LE:
461 prtd->bits_per_sample = 24;
462 break;
463 default:
464 return -EINVAL;
465 }
466
467 return 0;
468 }
469
q6apm_dai_pcm_new(struct snd_soc_component * component,struct snd_soc_pcm_runtime * rtd)470 static int q6apm_dai_pcm_new(struct snd_soc_component *component, struct snd_soc_pcm_runtime *rtd)
471 {
472 int size = BUFFER_BYTES_MAX;
473
474 return snd_pcm_set_fixed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV, component->dev, size);
475 }
476
q6apm_dai_compr_open(struct snd_soc_component * component,struct snd_compr_stream * stream)477 static int q6apm_dai_compr_open(struct snd_soc_component *component,
478 struct snd_compr_stream *stream)
479 {
480 struct snd_soc_pcm_runtime *rtd = stream->private_data;
481 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
482 struct snd_compr_runtime *runtime = stream->runtime;
483 struct q6apm_dai_rtd *prtd;
484 struct q6apm_dai_data *pdata;
485 struct device *dev = component->dev;
486 int ret, size;
487 int graph_id;
488
489 graph_id = cpu_dai->driver->id;
490 pdata = snd_soc_component_get_drvdata(component);
491 if (!pdata)
492 return -EINVAL;
493
494 prtd = kzalloc(sizeof(*prtd), GFP_KERNEL);
495 if (prtd == NULL)
496 return -ENOMEM;
497
498 prtd->cstream = stream;
499 prtd->graph = q6apm_graph_open(dev, (q6apm_cb)event_handler_compr, prtd, graph_id);
500 if (IS_ERR(prtd->graph)) {
501 ret = PTR_ERR(prtd->graph);
502 kfree(prtd);
503 return ret;
504 }
505
506 runtime->private_data = prtd;
507 runtime->dma_bytes = BUFFER_BYTES_MAX;
508 size = COMPR_PLAYBACK_MAX_FRAGMENT_SIZE * COMPR_PLAYBACK_MAX_NUM_FRAGMENTS;
509 ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, dev, size, &prtd->dma_buffer);
510 if (ret)
511 return ret;
512
513 if (pdata->sid < 0)
514 prtd->phys = prtd->dma_buffer.addr;
515 else
516 prtd->phys = prtd->dma_buffer.addr | (pdata->sid << 32);
517
518 snd_compr_set_runtime_buffer(stream, &prtd->dma_buffer);
519 spin_lock_init(&prtd->lock);
520
521 q6apm_enable_compress_module(dev, prtd->graph, true);
522 return 0;
523 }
524
q6apm_dai_compr_free(struct snd_soc_component * component,struct snd_compr_stream * stream)525 static int q6apm_dai_compr_free(struct snd_soc_component *component,
526 struct snd_compr_stream *stream)
527 {
528 struct snd_compr_runtime *runtime = stream->runtime;
529 struct q6apm_dai_rtd *prtd = runtime->private_data;
530
531 q6apm_graph_stop(prtd->graph);
532 q6apm_unmap_memory_regions(prtd->graph, SNDRV_PCM_STREAM_PLAYBACK);
533 q6apm_graph_close(prtd->graph);
534 snd_dma_free_pages(&prtd->dma_buffer);
535 prtd->graph = NULL;
536 kfree(prtd);
537 runtime->private_data = NULL;
538
539 return 0;
540 }
541
q6apm_dai_compr_get_caps(struct snd_soc_component * component,struct snd_compr_stream * stream,struct snd_compr_caps * caps)542 static int q6apm_dai_compr_get_caps(struct snd_soc_component *component,
543 struct snd_compr_stream *stream,
544 struct snd_compr_caps *caps)
545 {
546 caps->direction = SND_COMPRESS_PLAYBACK;
547 caps->min_fragment_size = COMPR_PLAYBACK_MIN_FRAGMENT_SIZE;
548 caps->max_fragment_size = COMPR_PLAYBACK_MAX_FRAGMENT_SIZE;
549 caps->min_fragments = COMPR_PLAYBACK_MIN_NUM_FRAGMENTS;
550 caps->max_fragments = COMPR_PLAYBACK_MAX_NUM_FRAGMENTS;
551 caps->num_codecs = 3;
552 caps->codecs[0] = SND_AUDIOCODEC_MP3;
553 caps->codecs[1] = SND_AUDIOCODEC_AAC;
554 caps->codecs[2] = SND_AUDIOCODEC_FLAC;
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_tstamp * tstamp)574 static int q6apm_dai_compr_pointer(struct snd_soc_component *component,
575 struct snd_compr_stream *stream,
576 struct snd_compr_tstamp *tstamp)
577 {
578 struct snd_compr_runtime *runtime = stream->runtime;
579 struct q6apm_dai_rtd *prtd = runtime->private_data;
580 unsigned long flags;
581
582 spin_lock_irqsave(&prtd->lock, flags);
583 tstamp->copied_total = prtd->copied_total;
584 tstamp->byte_offset = prtd->copied_total % prtd->pcm_size;
585 spin_unlock_irqrestore(&prtd->lock, flags);
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 unsigned long flags;
629
630 spin_lock_irqsave(&prtd->lock, flags);
631 prtd->bytes_received += count;
632 spin_unlock_irqrestore(&prtd->lock, flags);
633
634 return count;
635 }
636
q6apm_dai_compr_set_params(struct snd_soc_component * component,struct snd_compr_stream * stream,struct snd_compr_params * params)637 static int q6apm_dai_compr_set_params(struct snd_soc_component *component,
638 struct snd_compr_stream *stream,
639 struct snd_compr_params *params)
640 {
641 struct snd_compr_runtime *runtime = stream->runtime;
642 struct q6apm_dai_rtd *prtd = runtime->private_data;
643 struct q6apm_dai_data *pdata;
644 struct audioreach_module_config cfg;
645 struct snd_codec *codec = ¶ms->codec;
646 int dir = stream->direction;
647 int ret;
648
649 pdata = snd_soc_component_get_drvdata(component);
650 if (!pdata)
651 return -EINVAL;
652
653 prtd->periods = runtime->fragments;
654 prtd->pcm_count = runtime->fragment_size;
655 prtd->pcm_size = runtime->fragments * runtime->fragment_size;
656 prtd->bits_per_sample = 16;
657
658 prtd->pos = 0;
659
660 if (prtd->next_track != true) {
661 memcpy(&prtd->codec, codec, sizeof(*codec));
662
663 ret = q6apm_set_real_module_id(component->dev, prtd->graph, codec->id);
664 if (ret)
665 return ret;
666
667 cfg.direction = dir;
668 cfg.sample_rate = codec->sample_rate;
669 cfg.num_channels = 2;
670 cfg.bit_width = prtd->bits_per_sample;
671 cfg.fmt = codec->id;
672 memcpy(&cfg.codec, codec, sizeof(*codec));
673
674 ret = q6apm_graph_media_format_shmem(prtd->graph, &cfg);
675 if (ret < 0)
676 return ret;
677
678 ret = q6apm_graph_media_format_pcm(prtd->graph, &cfg);
679 if (ret)
680 return ret;
681
682 ret = q6apm_map_memory_regions(prtd->graph, SNDRV_PCM_STREAM_PLAYBACK,
683 prtd->phys, (prtd->pcm_size / prtd->periods),
684 prtd->periods);
685 if (ret < 0)
686 return -ENOMEM;
687
688 ret = q6apm_graph_prepare(prtd->graph);
689 if (ret)
690 return ret;
691
692 ret = q6apm_graph_start(prtd->graph);
693 if (ret)
694 return ret;
695
696 } else {
697 cfg.direction = dir;
698 cfg.sample_rate = codec->sample_rate;
699 cfg.num_channels = 2;
700 cfg.bit_width = prtd->bits_per_sample;
701 cfg.fmt = codec->id;
702 memcpy(&cfg.codec, codec, sizeof(*codec));
703
704 ret = audioreach_compr_set_param(prtd->graph, &cfg);
705 if (ret < 0)
706 return ret;
707 }
708 prtd->state = Q6APM_STREAM_RUNNING;
709
710 return 0;
711 }
712
q6apm_dai_compr_set_metadata(struct snd_soc_component * component,struct snd_compr_stream * stream,struct snd_compr_metadata * metadata)713 static int q6apm_dai_compr_set_metadata(struct snd_soc_component *component,
714 struct snd_compr_stream *stream,
715 struct snd_compr_metadata *metadata)
716 {
717 struct snd_compr_runtime *runtime = stream->runtime;
718 struct q6apm_dai_rtd *prtd = runtime->private_data;
719 int ret = 0;
720
721 switch (metadata->key) {
722 case SNDRV_COMPRESS_ENCODER_PADDING:
723 prtd->trailing_samples_drop = metadata->value[0];
724 q6apm_remove_trailing_silence(component->dev, prtd->graph,
725 prtd->trailing_samples_drop);
726 break;
727 case SNDRV_COMPRESS_ENCODER_DELAY:
728 prtd->initial_samples_drop = metadata->value[0];
729 q6apm_remove_initial_silence(component->dev, prtd->graph,
730 prtd->initial_samples_drop);
731 break;
732 default:
733 ret = -EINVAL;
734 break;
735 }
736
737 return ret;
738 }
739
q6apm_dai_compr_mmap(struct snd_soc_component * component,struct snd_compr_stream * stream,struct vm_area_struct * vma)740 static int q6apm_dai_compr_mmap(struct snd_soc_component *component,
741 struct snd_compr_stream *stream,
742 struct vm_area_struct *vma)
743 {
744 struct snd_compr_runtime *runtime = stream->runtime;
745 struct q6apm_dai_rtd *prtd = runtime->private_data;
746 struct device *dev = component->dev;
747
748 return dma_mmap_coherent(dev, vma, prtd->dma_buffer.area, prtd->dma_buffer.addr,
749 prtd->dma_buffer.bytes);
750 }
751
q6apm_compr_copy(struct snd_soc_component * component,struct snd_compr_stream * stream,char __user * buf,size_t count)752 static int q6apm_compr_copy(struct snd_soc_component *component,
753 struct snd_compr_stream *stream, char __user *buf,
754 size_t count)
755 {
756 struct snd_compr_runtime *runtime = stream->runtime;
757 struct q6apm_dai_rtd *prtd = runtime->private_data;
758 void *dstn;
759 unsigned long flags;
760 size_t copy;
761 u32 wflags = 0;
762 u32 app_pointer;
763 u32 bytes_received;
764 uint32_t bytes_to_write;
765 int avail, bytes_in_flight = 0;
766
767 bytes_received = prtd->bytes_received;
768
769 /**
770 * Make sure that next track data pointer is aligned at 32 bit boundary
771 * This is a Mandatory requirement from DSP data buffers alignment
772 */
773 if (prtd->next_track)
774 bytes_received = ALIGN(prtd->bytes_received, prtd->pcm_count);
775
776 app_pointer = bytes_received/prtd->pcm_size;
777 app_pointer = bytes_received - (app_pointer * prtd->pcm_size);
778 dstn = prtd->dma_buffer.area + app_pointer;
779
780 if (count < prtd->pcm_size - app_pointer) {
781 if (copy_from_user(dstn, buf, count))
782 return -EFAULT;
783 } else {
784 copy = prtd->pcm_size - app_pointer;
785 if (copy_from_user(dstn, buf, copy))
786 return -EFAULT;
787 if (copy_from_user(prtd->dma_buffer.area, buf + copy, count - copy))
788 return -EFAULT;
789 }
790
791 spin_lock_irqsave(&prtd->lock, flags);
792 bytes_in_flight = prtd->bytes_received - prtd->copied_total;
793
794 if (prtd->next_track) {
795 prtd->next_track = false;
796 prtd->copied_total = ALIGN(prtd->copied_total, prtd->pcm_count);
797 prtd->bytes_sent = ALIGN(prtd->bytes_sent, prtd->pcm_count);
798 }
799
800 prtd->bytes_received = bytes_received + count;
801
802 /* Kick off the data to dsp if its starving!! */
803 if (prtd->state == Q6APM_STREAM_RUNNING && (bytes_in_flight == 0)) {
804 bytes_to_write = prtd->pcm_count;
805 avail = prtd->bytes_received - prtd->bytes_sent;
806
807 if (avail < prtd->pcm_count)
808 bytes_to_write = avail;
809
810 q6apm_write_async(prtd->graph, bytes_to_write, 0, 0, wflags);
811 prtd->bytes_sent += bytes_to_write;
812 }
813
814 spin_unlock_irqrestore(&prtd->lock, flags);
815
816 return count;
817 }
818
819 static const struct snd_compress_ops q6apm_dai_compress_ops = {
820 .open = q6apm_dai_compr_open,
821 .free = q6apm_dai_compr_free,
822 .get_caps = q6apm_dai_compr_get_caps,
823 .get_codec_caps = q6apm_dai_compr_get_codec_caps,
824 .pointer = q6apm_dai_compr_pointer,
825 .trigger = q6apm_dai_compr_trigger,
826 .ack = q6apm_dai_compr_ack,
827 .set_params = q6apm_dai_compr_set_params,
828 .set_metadata = q6apm_dai_compr_set_metadata,
829 .mmap = q6apm_dai_compr_mmap,
830 .copy = q6apm_compr_copy,
831 };
832
833 static const struct snd_soc_component_driver q6apm_fe_dai_component = {
834 .name = DRV_NAME,
835 .open = q6apm_dai_open,
836 .close = q6apm_dai_close,
837 .prepare = q6apm_dai_prepare,
838 .pcm_construct = q6apm_dai_pcm_new,
839 .hw_params = q6apm_dai_hw_params,
840 .pointer = q6apm_dai_pointer,
841 .trigger = q6apm_dai_trigger,
842 .compress_ops = &q6apm_dai_compress_ops,
843 .use_dai_pcm_id = true,
844 };
845
q6apm_dai_probe(struct platform_device * pdev)846 static int q6apm_dai_probe(struct platform_device *pdev)
847 {
848 struct device *dev = &pdev->dev;
849 struct device_node *node = dev->of_node;
850 struct q6apm_dai_data *pdata;
851 struct of_phandle_args args;
852 int rc;
853
854 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
855 if (!pdata)
856 return -ENOMEM;
857
858 rc = of_parse_phandle_with_fixed_args(node, "iommus", 1, 0, &args);
859 if (rc < 0)
860 pdata->sid = -1;
861 else
862 pdata->sid = args.args[0] & SID_MASK_DEFAULT;
863
864 dev_set_drvdata(dev, pdata);
865
866 return devm_snd_soc_register_component(dev, &q6apm_fe_dai_component, NULL, 0);
867 }
868
869 #ifdef CONFIG_OF
870 static const struct of_device_id q6apm_dai_device_id[] = {
871 { .compatible = "qcom,q6apm-dais" },
872 {},
873 };
874 MODULE_DEVICE_TABLE(of, q6apm_dai_device_id);
875 #endif
876
877 static struct platform_driver q6apm_dai_platform_driver = {
878 .driver = {
879 .name = "q6apm-dai",
880 .of_match_table = of_match_ptr(q6apm_dai_device_id),
881 },
882 .probe = q6apm_dai_probe,
883 };
884 module_platform_driver(q6apm_dai_platform_driver);
885
886 MODULE_DESCRIPTION("Q6APM dai driver");
887 MODULE_LICENSE("GPL");
888