summaryrefslogtreecommitdiff
path: root/sound/soc/qcom/qdsp6/q6apm-dai.c
blob: 19c4a90ec1ea96e793f00016c0dc03040428fcfe (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2021, Linaro Limited

#include <linux/init.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/pcm.h>
#include <asm/dma.h>
#include <linux/dma-mapping.h>
#include <linux/of_device.h>
#include <sound/pcm_params.h>
#include "q6apm.h"

#define DRV_NAME "q6apm-dai"

#define PLAYBACK_MIN_NUM_PERIODS	2
#define PLAYBACK_MAX_NUM_PERIODS	8
#define PLAYBACK_MAX_PERIOD_SIZE	65536
#define PLAYBACK_MIN_PERIOD_SIZE	128
#define CAPTURE_MIN_NUM_PERIODS		2
#define CAPTURE_MAX_NUM_PERIODS		8
#define CAPTURE_MAX_PERIOD_SIZE		4096
#define CAPTURE_MIN_PERIOD_SIZE		320
#define BUFFER_BYTES_MAX (PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE)
#define BUFFER_BYTES_MIN (PLAYBACK_MIN_NUM_PERIODS * PLAYBACK_MIN_PERIOD_SIZE)
#define SID_MASK_DEFAULT	0xF

enum stream_state {
	Q6APM_STREAM_IDLE = 0,
	Q6APM_STREAM_STOPPED,
	Q6APM_STREAM_RUNNING,
};

struct q6apm_dai_rtd {
	struct snd_pcm_substream *substream;
	struct snd_compr_stream *cstream;
	struct snd_compr_params codec_param;
	struct snd_dma_buffer dma_buffer;
	phys_addr_t phys;
	unsigned int pcm_size;
	unsigned int pcm_count;
	unsigned int pos;       /* Buffer position */
	unsigned int periods;
	unsigned int bytes_sent;
	unsigned int bytes_received;
	unsigned int copied_total;
	uint16_t bits_per_sample;
	uint16_t source; /* Encoding source bit mask */
	uint16_t session_id;
	enum stream_state state;
	struct q6apm_graph *graph;
};

struct q6apm_dai_data {
	long long sid;
};

static struct snd_pcm_hardware q6apm_dai_hardware_capture = {
	.info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_BLOCK_TRANSFER |
				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
	.formats =              (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE),
	.rates =                SNDRV_PCM_RATE_8000_48000,
	.rate_min =             8000,
	.rate_max =             48000,
	.channels_min =         2,
	.channels_max =         4,
	.buffer_bytes_max =     CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
	.period_bytes_min =	CAPTURE_MIN_PERIOD_SIZE,
	.period_bytes_max =     CAPTURE_MAX_PERIOD_SIZE,
	.periods_min =          CAPTURE_MIN_NUM_PERIODS,
	.periods_max =          CAPTURE_MAX_NUM_PERIODS,
	.fifo_size =            0,
};

static struct snd_pcm_hardware q6apm_dai_hardware_playback = {
	.info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_BLOCK_TRANSFER |
				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
	.formats =              (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE),
	.rates =                SNDRV_PCM_RATE_8000_192000,
	.rate_min =             8000,
	.rate_max =             192000,
	.channels_min =         2,
	.channels_max =         8,
	.buffer_bytes_max =     (PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE),
	.period_bytes_min =	PLAYBACK_MIN_PERIOD_SIZE,
	.period_bytes_max =     PLAYBACK_MAX_PERIOD_SIZE,
	.periods_min =          PLAYBACK_MIN_NUM_PERIODS,
	.periods_max =          PLAYBACK_MAX_NUM_PERIODS,
	.fifo_size =            0,
};

static void event_handler(uint32_t opcode, uint32_t token, uint32_t *payload, void *priv)
{
	struct q6apm_dai_rtd *prtd = priv;
	struct snd_pcm_substream *substream = prtd->substream;

	switch (opcode) {
	case APM_CLIENT_EVENT_CMD_EOS_DONE:
		prtd->state = Q6APM_STREAM_STOPPED;
		break;
	case APM_CLIENT_EVENT_DATA_WRITE_DONE:
		prtd->pos += prtd->pcm_count;
		snd_pcm_period_elapsed(substream);
		if (prtd->state == Q6APM_STREAM_RUNNING)
			q6apm_write_async(prtd->graph, prtd->pcm_count, 0, 0, 0);

		break;
	case APM_CLIENT_EVENT_DATA_READ_DONE:
		prtd->pos += prtd->pcm_count;
		snd_pcm_period_elapsed(substream);
		if (prtd->state == Q6APM_STREAM_RUNNING)
			q6apm_read(prtd->graph);

		break;
	default:
		break;
	}
}

static int q6apm_dai_prepare(struct snd_soc_component *component,
			     struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct q6apm_dai_rtd *prtd = runtime->private_data;
	struct audioreach_module_config cfg;
	struct device *dev = component->dev;
	struct q6apm_dai_data *pdata;
	int ret;

	pdata = snd_soc_component_get_drvdata(component);
	if (!pdata)
		return -EINVAL;

	if (!prtd || !prtd->graph) {
		dev_err(dev, "%s: private data null or audio client freed\n", __func__);
		return -EINVAL;
	}

	cfg.direction = substream->stream;
	cfg.sample_rate = runtime->rate;
	cfg.num_channels = runtime->channels;
	cfg.bit_width = prtd->bits_per_sample;

	prtd->pcm_count = snd_pcm_lib_period_bytes(substream);
	prtd->pos = 0;
	/* rate and channels are sent to audio driver */
	ret = q6apm_graph_media_format_shmem(prtd->graph, &cfg);
	if (ret < 0) {
		dev_err(dev, "%s: q6apm_open_write failed\n", __func__);
		return ret;
	}

	ret = q6apm_graph_media_format_pcm(prtd->graph, &cfg);
	if (ret < 0)
		dev_err(dev, "%s: CMD Format block failed\n", __func__);

	ret = q6apm_map_memory_regions(prtd->graph, substream->stream, prtd->phys,
				       (prtd->pcm_size / prtd->periods), prtd->periods);

	if (ret < 0) {
		dev_err(dev, "Audio Start: Buffer Allocation failed rc = %d\n",	ret);
		return -ENOMEM;
	}

	ret = q6apm_graph_prepare(prtd->graph);
	if (ret) {
		dev_err(dev, "Failed to prepare Graph %d\n", ret);
		return ret;
	}

	ret = q6apm_graph_start(prtd->graph);
	if (ret) {
		dev_err(dev, "Failed to Start Graph %d\n", ret);
		return ret;
	}

	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
		int i;
		/* Queue the buffers for Capture ONLY after graph is started */
		for (i = 0; i < runtime->periods; i++)
			q6apm_read(prtd->graph);

	}

	/* Now that graph as been prepared and started update the internal state accordingly */
	prtd->state = Q6APM_STREAM_RUNNING;

	return 0;
}

static int q6apm_dai_trigger(struct snd_soc_component *component,
			     struct snd_pcm_substream *substream, int cmd)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct q6apm_dai_rtd *prtd = runtime->private_data;
	int ret = 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		 /* start writing buffers for playback only as we already queued capture buffers */
		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
			ret = q6apm_write_async(prtd->graph, prtd->pcm_count, 0, 0, 0);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		/* TODO support be handled via SoftPause Module */
		prtd->state = Q6APM_STREAM_STOPPED;
		break;
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		break;
	default:
		ret = -EINVAL;
		break;
	}

	return ret;
}

static int q6apm_dai_open(struct snd_soc_component *component,
			  struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_soc_pcm_runtime *soc_prtd = substream->private_data;
	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_prtd, 0);
	struct device *dev = component->dev;
	struct q6apm_dai_data *pdata;
	struct q6apm_dai_rtd *prtd;
	int graph_id, ret;

	graph_id = cpu_dai->driver->id;

	pdata = snd_soc_component_get_drvdata(component);
	if (!pdata) {
		dev_err(dev, "Drv data not found ..\n");
		return -EINVAL;
	}

	prtd = kzalloc(sizeof(*prtd), GFP_KERNEL);
	if (prtd == NULL)
		return -ENOMEM;

	prtd->substream = substream;
	prtd->graph = q6apm_graph_open(dev, (q6apm_cb)event_handler, prtd, graph_id);
	if (IS_ERR(prtd->graph)) {
		dev_err(dev, "%s: Could not allocate memory\n", __func__);
		ret = PTR_ERR(prtd->graph);
		goto err;
	}

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		runtime->hw = q6apm_dai_hardware_playback;
	else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
		runtime->hw = q6apm_dai_hardware_capture;

	/* Ensure that buffer size is a multiple of period size */
	ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
	if (ret < 0) {
		dev_err(dev, "snd_pcm_hw_constraint_integer failed\n");
		goto err;
	}

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		ret = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
						   BUFFER_BYTES_MIN, BUFFER_BYTES_MAX);
		if (ret < 0) {
			dev_err(dev, "constraint for buffer bytes min max ret = %d\n", ret);
			goto err;
		}
	}

	ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
	if (ret < 0) {
		dev_err(dev, "constraint for period bytes step ret = %d\n", ret);
		goto err;
	}

	ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32);
	if (ret < 0) {
		dev_err(dev, "constraint for buffer bytes step ret = %d\n", ret);
		goto err;
	}

	runtime->private_data = prtd;
	runtime->dma_bytes = BUFFER_BYTES_MAX;
	if (pdata->sid < 0)
		prtd->phys = substream->dma_buffer.addr;
	else
		prtd->phys = substream->dma_buffer.addr | (pdata->sid << 32);

	return 0;
err:
	kfree(prtd);

	return ret;
}

static int q6apm_dai_close(struct snd_soc_component *component,
			   struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct q6apm_dai_rtd *prtd = runtime->private_data;

	if (prtd->state) { /* only stop graph that is started */
		q6apm_graph_stop(prtd->graph);
		q6apm_unmap_memory_regions(prtd->graph, substream->stream);
	}

	q6apm_graph_close(prtd->graph);
	prtd->graph = NULL;
	kfree(prtd);
	runtime->private_data = NULL;

	return 0;
}

static snd_pcm_uframes_t q6apm_dai_pointer(struct snd_soc_component *component,
					   struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct q6apm_dai_rtd *prtd = runtime->private_data;

	if (prtd->pos == prtd->pcm_size)
		prtd->pos = 0;

	return bytes_to_frames(runtime, prtd->pos);
}

static int q6apm_dai_hw_params(struct snd_soc_component *component,
			       struct snd_pcm_substream *substream,
			       struct snd_pcm_hw_params *params)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct q6apm_dai_rtd *prtd = runtime->private_data;

	prtd->pcm_size = params_buffer_bytes(params);
	prtd->periods = params_periods(params);

	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		prtd->bits_per_sample = 16;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		prtd->bits_per_sample = 24;
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static int q6apm_dai_pcm_new(struct snd_soc_component *component, struct snd_soc_pcm_runtime *rtd)
{
	int size = BUFFER_BYTES_MAX;

	return snd_pcm_set_fixed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV, component->dev, size);
}

static const struct snd_soc_component_driver q6apm_fe_dai_component = {
	.name		= DRV_NAME,
	.open		= q6apm_dai_open,
	.close		= q6apm_dai_close,
	.prepare	= q6apm_dai_prepare,
	.pcm_construct	= q6apm_dai_pcm_new,
	.hw_params	= q6apm_dai_hw_params,
	.pointer	= q6apm_dai_pointer,
	.trigger	= q6apm_dai_trigger,
};

static int q6apm_dai_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct device_node *node = dev->of_node;
	struct q6apm_dai_data *pdata;
	struct of_phandle_args args;
	int rc;

	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
	if (!pdata)
		return -ENOMEM;

	rc = of_parse_phandle_with_fixed_args(node, "iommus", 1, 0, &args);
	if (rc < 0)
		pdata->sid = -1;
	else
		pdata->sid = args.args[0] & SID_MASK_DEFAULT;

	dev_set_drvdata(dev, pdata);

	return devm_snd_soc_register_component(dev, &q6apm_fe_dai_component, NULL, 0);
}

#ifdef CONFIG_OF
static const struct of_device_id q6apm_dai_device_id[] = {
	{ .compatible = "qcom,q6apm-dais" },
	{},
};
MODULE_DEVICE_TABLE(of, q6apm_dai_device_id);
#endif

static struct platform_driver q6apm_dai_platform_driver = {
	.driver = {
		.name = "q6apm-dai",
		.of_match_table = of_match_ptr(q6apm_dai_device_id),
	},
	.probe = q6apm_dai_probe,
};
module_platform_driver(q6apm_dai_platform_driver);

MODULE_DESCRIPTION("Q6APM dai driver");
MODULE_LICENSE("GPL");