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