summaryrefslogtreecommitdiff
path: root/sound/soc/generic/simple-card-utils.c
blob: 9b794775df537ac2975833d4117ec79758d181f5 (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
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
// SPDX-License-Identifier: GPL-2.0
//
// simple-card-utils.c
//
// Copyright (c) 2016 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

#include <linux/clk.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/of_graph.h>
#include <sound/jack.h>
#include <sound/simple_card_utils.h>

void asoc_simple_convert_fixup(struct asoc_simple_data *data,
			       struct snd_pcm_hw_params *params)
{
	struct snd_interval *rate = hw_param_interval(params,
						SNDRV_PCM_HW_PARAM_RATE);
	struct snd_interval *channels = hw_param_interval(params,
						SNDRV_PCM_HW_PARAM_CHANNELS);

	if (data->convert_rate)
		rate->min =
		rate->max = data->convert_rate;

	if (data->convert_channels)
		channels->min =
		channels->max = data->convert_channels;
}
EXPORT_SYMBOL_GPL(asoc_simple_convert_fixup);

void asoc_simple_parse_convert(struct device *dev,
			       struct device_node *np,
			       char *prefix,
			       struct asoc_simple_data *data)
{
	char prop[128];

	if (!prefix)
		prefix = "";

	/* sampling rate convert */
	snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-rate");
	of_property_read_u32(np, prop, &data->convert_rate);

	/* channels transfer */
	snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-channels");
	of_property_read_u32(np, prop, &data->convert_channels);
}
EXPORT_SYMBOL_GPL(asoc_simple_parse_convert);

int asoc_simple_parse_daifmt(struct device *dev,
			     struct device_node *node,
			     struct device_node *codec,
			     char *prefix,
			     unsigned int *retfmt)
{
	struct device_node *bitclkmaster = NULL;
	struct device_node *framemaster = NULL;
	unsigned int daifmt;

	daifmt = snd_soc_of_parse_daifmt(node, prefix,
					 &bitclkmaster, &framemaster);
	daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;

	if (!bitclkmaster && !framemaster) {
		/*
		 * No dai-link level and master setting was not found from
		 * sound node level, revert back to legacy DT parsing and
		 * take the settings from codec node.
		 */
		dev_dbg(dev, "Revert to legacy daifmt parsing\n");

		daifmt = snd_soc_of_parse_daifmt(codec, NULL, NULL, NULL) |
			(daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK);
	} else {
		if (codec == bitclkmaster)
			daifmt |= (codec == framemaster) ?
				SND_SOC_DAIFMT_CBM_CFM : SND_SOC_DAIFMT_CBM_CFS;
		else
			daifmt |= (codec == framemaster) ?
				SND_SOC_DAIFMT_CBS_CFM : SND_SOC_DAIFMT_CBS_CFS;
	}

	of_node_put(bitclkmaster);
	of_node_put(framemaster);

	*retfmt = daifmt;

	return 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_parse_daifmt);

int asoc_simple_set_dailink_name(struct device *dev,
				 struct snd_soc_dai_link *dai_link,
				 const char *fmt, ...)
{
	va_list ap;
	char *name = NULL;
	int ret = -ENOMEM;

	va_start(ap, fmt);
	name = devm_kvasprintf(dev, GFP_KERNEL, fmt, ap);
	va_end(ap);

	if (name) {
		ret = 0;

		dai_link->name		= name;
		dai_link->stream_name	= name;
	}

	return ret;
}
EXPORT_SYMBOL_GPL(asoc_simple_set_dailink_name);

int asoc_simple_parse_card_name(struct snd_soc_card *card,
				char *prefix)
{
	int ret;

	if (!prefix)
		prefix = "";

	/* Parse the card name from DT */
	ret = snd_soc_of_parse_card_name(card, "label");
	if (ret < 0 || !card->name) {
		char prop[128];

		snprintf(prop, sizeof(prop), "%sname", prefix);
		ret = snd_soc_of_parse_card_name(card, prop);
		if (ret < 0)
			return ret;
	}

	if (!card->name && card->dai_link)
		card->name = card->dai_link->name;

	return 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_parse_card_name);

static int asoc_simple_clk_enable(struct asoc_simple_dai *dai)
{
	if (dai)
		return clk_prepare_enable(dai->clk);

	return 0;
}

static void asoc_simple_clk_disable(struct asoc_simple_dai *dai)
{
	if (dai)
		clk_disable_unprepare(dai->clk);
}

int asoc_simple_parse_clk(struct device *dev,
			  struct device_node *node,
			  struct asoc_simple_dai *simple_dai,
			  struct snd_soc_dai_link_component *dlc)
{
	struct clk *clk;
	u32 val;

	/*
	 * Parse dai->sysclk come from "clocks = <&xxx>"
	 * (if system has common clock)
	 *  or "system-clock-frequency = <xxx>"
	 *  or device's module clock.
	 */
	clk = devm_get_clk_from_child(dev, node, NULL);
	if (!IS_ERR(clk)) {
		simple_dai->sysclk = clk_get_rate(clk);

		simple_dai->clk = clk;
	} else if (!of_property_read_u32(node, "system-clock-frequency", &val)) {
		simple_dai->sysclk = val;
	} else {
		clk = devm_get_clk_from_child(dev, dlc->of_node, NULL);
		if (!IS_ERR(clk))
			simple_dai->sysclk = clk_get_rate(clk);
	}

	if (of_property_read_bool(node, "system-clock-direction-out"))
		simple_dai->clk_direction = SND_SOC_CLOCK_OUT;

	return 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_parse_clk);

int asoc_simple_startup(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
	struct simple_dai_props *dai_props = simple_priv_to_props(priv, rtd->num);
	int ret;

	ret = asoc_simple_clk_enable(dai_props->cpu_dai);
	if (ret)
		return ret;

	ret = asoc_simple_clk_enable(dai_props->codec_dai);
	if (ret)
		asoc_simple_clk_disable(dai_props->cpu_dai);

	return ret;
}
EXPORT_SYMBOL_GPL(asoc_simple_startup);

void asoc_simple_shutdown(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
	struct simple_dai_props *dai_props =
		simple_priv_to_props(priv, rtd->num);

	if (dai_props->mclk_fs) {
		snd_soc_dai_set_sysclk(codec_dai, 0, 0, SND_SOC_CLOCK_IN);
		snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_OUT);
	}

	asoc_simple_clk_disable(dai_props->cpu_dai);

	asoc_simple_clk_disable(dai_props->codec_dai);
}
EXPORT_SYMBOL_GPL(asoc_simple_shutdown);

static int asoc_simple_set_clk_rate(struct asoc_simple_dai *simple_dai,
				    unsigned long rate)
{
	if (!simple_dai)
		return 0;

	if (!simple_dai->clk)
		return 0;

	if (clk_get_rate(simple_dai->clk) == rate)
		return 0;

	return clk_set_rate(simple_dai->clk, rate);
}

int asoc_simple_hw_params(struct snd_pcm_substream *substream,
			  struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
	struct simple_dai_props *dai_props =
		simple_priv_to_props(priv, rtd->num);
	unsigned int mclk, mclk_fs = 0;
	int ret = 0;

	if (dai_props->mclk_fs)
		mclk_fs = dai_props->mclk_fs;

	if (mclk_fs) {
		mclk = params_rate(params) * mclk_fs;

		ret = asoc_simple_set_clk_rate(dai_props->codec_dai, mclk);
		if (ret < 0)
			return ret;

		ret = asoc_simple_set_clk_rate(dai_props->cpu_dai, mclk);
		if (ret < 0)
			return ret;

		ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
					     SND_SOC_CLOCK_IN);
		if (ret && ret != -ENOTSUPP)
			goto err;

		ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
					     SND_SOC_CLOCK_OUT);
		if (ret && ret != -ENOTSUPP)
			goto err;
	}
	return 0;
err:
	return ret;
}
EXPORT_SYMBOL_GPL(asoc_simple_hw_params);

int asoc_simple_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
				   struct snd_pcm_hw_params *params)
{
	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
	struct simple_dai_props *dai_props = simple_priv_to_props(priv, rtd->num);

	asoc_simple_convert_fixup(&dai_props->adata, params);

	return 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_be_hw_params_fixup);

static int asoc_simple_init_dai(struct snd_soc_dai *dai,
				     struct asoc_simple_dai *simple_dai)
{
	int ret;

	if (!simple_dai)
		return 0;

	if (simple_dai->sysclk) {
		ret = snd_soc_dai_set_sysclk(dai, 0, simple_dai->sysclk,
					     simple_dai->clk_direction);
		if (ret && ret != -ENOTSUPP) {
			dev_err(dai->dev, "simple-card: set_sysclk error\n");
			return ret;
		}
	}

	if (simple_dai->slots) {
		ret = snd_soc_dai_set_tdm_slot(dai,
					       simple_dai->tx_slot_mask,
					       simple_dai->rx_slot_mask,
					       simple_dai->slots,
					       simple_dai->slot_width);
		if (ret && ret != -ENOTSUPP) {
			dev_err(dai->dev, "simple-card: set_tdm_slot error\n");
			return ret;
		}
	}

	return 0;
}

int asoc_simple_dai_init(struct snd_soc_pcm_runtime *rtd)
{
	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
	struct simple_dai_props *dai_props = simple_priv_to_props(priv, rtd->num);
	int ret;

	ret = asoc_simple_init_dai(rtd->codec_dai,
				   dai_props->codec_dai);
	if (ret < 0)
		return ret;

	ret = asoc_simple_init_dai(rtd->cpu_dai,
				   dai_props->cpu_dai);
	if (ret < 0)
		return ret;

	return 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_dai_init);

void asoc_simple_canonicalize_platform(struct snd_soc_dai_link *dai_link)
{
	/* Assumes platform == cpu */
	if (!dai_link->platforms->of_node)
		dai_link->platforms->of_node = dai_link->cpus->of_node;

	/*
	 * DPCM BE can be no platform.
	 * Alloced memory will be waste, but not leak.
	 */
	if (!dai_link->platforms->of_node)
		dai_link->num_platforms = 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_canonicalize_platform);

void asoc_simple_canonicalize_cpu(struct snd_soc_dai_link *dai_link,
				  int is_single_links)
{
	/*
	 * In soc_bind_dai_link() will check cpu name after
	 * of_node matching if dai_link has cpu_dai_name.
	 * but, it will never match if name was created by
	 * fmt_single_name() remove cpu_dai_name if cpu_args
	 * was 0. See:
	 *	fmt_single_name()
	 *	fmt_multiple_name()
	 */
	if (is_single_links)
		dai_link->cpus->dai_name = NULL;
}
EXPORT_SYMBOL_GPL(asoc_simple_canonicalize_cpu);

int asoc_simple_clean_reference(struct snd_soc_card *card)
{
	struct snd_soc_dai_link *dai_link;
	int i;

	for_each_card_prelinks(card, i, dai_link) {
		of_node_put(dai_link->cpus->of_node);
		of_node_put(dai_link->codecs->of_node);
	}
	return 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_clean_reference);

int asoc_simple_parse_routing(struct snd_soc_card *card,
			      char *prefix)
{
	struct device_node *node = card->dev->of_node;
	char prop[128];

	if (!prefix)
		prefix = "";

	snprintf(prop, sizeof(prop), "%s%s", prefix, "routing");

	if (!of_property_read_bool(node, prop))
		return 0;

	return snd_soc_of_parse_audio_routing(card, prop);
}
EXPORT_SYMBOL_GPL(asoc_simple_parse_routing);

int asoc_simple_parse_widgets(struct snd_soc_card *card,
			      char *prefix)
{
	struct device_node *node = card->dev->of_node;
	char prop[128];

	if (!prefix)
		prefix = "";

	snprintf(prop, sizeof(prop), "%s%s", prefix, "widgets");

	if (of_property_read_bool(node, prop))
		return snd_soc_of_parse_audio_simple_widgets(card, prop);

	/* no widgets is not error */
	return 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_parse_widgets);

int asoc_simple_parse_pin_switches(struct snd_soc_card *card,
				   char *prefix)
{
	const unsigned int nb_controls_max = 16;
	const char **strings, *control_name;
	struct snd_kcontrol_new *controls;
	struct device *dev = card->dev;
	unsigned int i, nb_controls;
	char prop[128];
	int ret;

	if (!prefix)
		prefix = "";

	snprintf(prop, sizeof(prop), "%s%s", prefix, "pin-switches");

	if (!of_property_read_bool(dev->of_node, prop))
		return 0;

	strings = devm_kcalloc(dev, nb_controls_max,
			       sizeof(*strings), GFP_KERNEL);
	if (!strings)
		return -ENOMEM;

	ret = of_property_read_string_array(dev->of_node, prop,
					    strings, nb_controls_max);
	if (ret < 0)
		return ret;

	nb_controls = (unsigned int)ret;

	controls = devm_kcalloc(dev, nb_controls,
				sizeof(*controls), GFP_KERNEL);
	if (!controls)
		return -ENOMEM;

	for (i = 0; i < nb_controls; i++) {
		control_name = devm_kasprintf(dev, GFP_KERNEL,
					      "%s Switch", strings[i]);
		if (!control_name)
			return -ENOMEM;

		controls[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
		controls[i].name = control_name;
		controls[i].info = snd_soc_dapm_info_pin_switch;
		controls[i].get = snd_soc_dapm_get_pin_switch;
		controls[i].put = snd_soc_dapm_put_pin_switch;
		controls[i].private_value = (unsigned long)strings[i];
	}

	card->controls = controls;
	card->num_controls = nb_controls;

	return 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_parse_pin_switches);

int asoc_simple_init_jack(struct snd_soc_card *card,
			  struct asoc_simple_jack *sjack,
			  int is_hp, char *prefix)
{
	struct device *dev = card->dev;
	enum of_gpio_flags flags;
	char prop[128];
	char *pin_name;
	char *gpio_name;
	int mask;
	int det;

	if (!prefix)
		prefix = "";

	sjack->gpio.gpio = -ENOENT;

	if (is_hp) {
		snprintf(prop, sizeof(prop), "%shp-det-gpio", prefix);
		pin_name	= "Headphones";
		gpio_name	= "Headphone detection";
		mask		= SND_JACK_HEADPHONE;
	} else {
		snprintf(prop, sizeof(prop), "%smic-det-gpio", prefix);
		pin_name	= "Mic Jack";
		gpio_name	= "Mic detection";
		mask		= SND_JACK_MICROPHONE;
	}

	det = of_get_named_gpio_flags(dev->of_node, prop, 0, &flags);
	if (det == -EPROBE_DEFER)
		return -EPROBE_DEFER;

	if (gpio_is_valid(det)) {
		sjack->pin.pin		= pin_name;
		sjack->pin.mask		= mask;

		sjack->gpio.name	= gpio_name;
		sjack->gpio.report	= mask;
		sjack->gpio.gpio	= det;
		sjack->gpio.invert	= !!(flags & OF_GPIO_ACTIVE_LOW);
		sjack->gpio.debounce_time = 150;

		snd_soc_card_jack_new(card, pin_name, mask,
				      &sjack->jack,
				      &sjack->pin, 1);

		snd_soc_jack_add_gpios(&sjack->jack, 1,
				       &sjack->gpio);
	}

	return 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_init_jack);

int asoc_simple_init_priv(struct asoc_simple_priv *priv,
			  struct link_info *li)
{
	struct snd_soc_card *card = simple_priv_to_card(priv);
	struct device *dev = simple_priv_to_dev(priv);
	struct snd_soc_dai_link *dai_link;
	struct simple_dai_props *dai_props;
	struct asoc_simple_dai *dais;
	struct snd_soc_codec_conf *cconf = NULL;
	int i;

	dai_props = devm_kcalloc(dev, li->link, sizeof(*dai_props), GFP_KERNEL);
	dai_link  = devm_kcalloc(dev, li->link, sizeof(*dai_link),  GFP_KERNEL);
	dais      = devm_kcalloc(dev, li->dais, sizeof(*dais),      GFP_KERNEL);
	if (!dai_props || !dai_link || !dais)
		return -ENOMEM;

	if (li->conf) {
		cconf = devm_kcalloc(dev, li->conf, sizeof(*cconf), GFP_KERNEL);
		if (!cconf)
			return -ENOMEM;
	}

	/*
	 * Use snd_soc_dai_link_component instead of legacy style
	 * It is codec only. but cpu/platform will be supported in the future.
	 * see
	 *	soc-core.c :: snd_soc_init_multicodec()
	 *
	 * "platform" might be removed
	 * see
	 *	simple-card-utils.c :: asoc_simple_canonicalize_platform()
	 */
	for (i = 0; i < li->link; i++) {
		dai_link[i].cpus		= &dai_props[i].cpus;
		dai_link[i].num_cpus		= 1;
		dai_link[i].codecs		= &dai_props[i].codecs;
		dai_link[i].num_codecs		= 1;
		dai_link[i].platforms		= &dai_props[i].platforms;
		dai_link[i].num_platforms	= 1;
	}

	priv->dai_props		= dai_props;
	priv->dai_link		= dai_link;
	priv->dais		= dais;
	priv->codec_conf	= cconf;

	card->dai_link		= priv->dai_link;
	card->num_links		= li->link;
	card->codec_conf	= cconf;
	card->num_configs	= li->conf;

	return 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_init_priv);

/* Module information */
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
MODULE_DESCRIPTION("ALSA SoC Simple Card Utils");
MODULE_LICENSE("GPL v2");