1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // simple-card-utils.c
4 //
5 // Copyright (c) 2016 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6 
7 #include <linux/clk.h>
8 #include <linux/gpio.h>
9 #include <linux/gpio/consumer.h>
10 #include <linux/module.h>
11 #include <linux/of.h>
12 #include <linux/of_graph.h>
13 #include <sound/jack.h>
14 #include <sound/pcm_params.h>
15 #include <sound/simple_card_utils.h>
16 
17 static void asoc_simple_fixup_sample_fmt(struct asoc_simple_data *data,
18 					 struct snd_pcm_hw_params *params)
19 {
20 	int i;
21 	struct snd_mask *mask = hw_param_mask(params,
22 					      SNDRV_PCM_HW_PARAM_FORMAT);
23 	struct {
24 		char *fmt;
25 		u32 val;
26 	} of_sample_fmt_table[] = {
27 		{ "s8",		SNDRV_PCM_FORMAT_S8},
28 		{ "s16_le",	SNDRV_PCM_FORMAT_S16_LE},
29 		{ "s24_le",	SNDRV_PCM_FORMAT_S24_LE},
30 		{ "s24_3le",	SNDRV_PCM_FORMAT_S24_3LE},
31 		{ "s32_le",	SNDRV_PCM_FORMAT_S32_LE},
32 	};
33 
34 	for (i = 0; i < ARRAY_SIZE(of_sample_fmt_table); i++) {
35 		if (!strcmp(data->convert_sample_format,
36 			    of_sample_fmt_table[i].fmt)) {
37 			snd_mask_none(mask);
38 			snd_mask_set(mask, of_sample_fmt_table[i].val);
39 			break;
40 		}
41 	}
42 }
43 
44 void asoc_simple_parse_convert(struct device_node *np,
45 			       char *prefix,
46 			       struct asoc_simple_data *data)
47 {
48 	char prop[128];
49 
50 	if (!prefix)
51 		prefix = "";
52 
53 	/* sampling rate convert */
54 	snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-rate");
55 	of_property_read_u32(np, prop, &data->convert_rate);
56 
57 	/* channels transfer */
58 	snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-channels");
59 	of_property_read_u32(np, prop, &data->convert_channels);
60 
61 	/* convert sample format */
62 	snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-sample-format");
63 	of_property_read_string(np, prop, &data->convert_sample_format);
64 }
65 EXPORT_SYMBOL_GPL(asoc_simple_parse_convert);
66 
67 /**
68  * asoc_simple_is_convert_required() - Query if HW param conversion was requested
69  * @data: Link data.
70  *
71  * Returns true if any HW param conversion was requested for this DAI link with
72  * any "convert-xxx" properties.
73  */
74 bool asoc_simple_is_convert_required(const struct asoc_simple_data *data)
75 {
76 	return data->convert_rate ||
77 	       data->convert_channels ||
78 	       data->convert_sample_format;
79 }
80 EXPORT_SYMBOL_GPL(asoc_simple_is_convert_required);
81 
82 int asoc_simple_parse_daifmt(struct device *dev,
83 			     struct device_node *node,
84 			     struct device_node *codec,
85 			     char *prefix,
86 			     unsigned int *retfmt)
87 {
88 	struct device_node *bitclkmaster = NULL;
89 	struct device_node *framemaster = NULL;
90 	unsigned int daifmt;
91 
92 	daifmt = snd_soc_daifmt_parse_format(node, prefix);
93 
94 	snd_soc_daifmt_parse_clock_provider_as_phandle(node, prefix, &bitclkmaster, &framemaster);
95 	if (!bitclkmaster && !framemaster) {
96 		/*
97 		 * No dai-link level and master setting was not found from
98 		 * sound node level, revert back to legacy DT parsing and
99 		 * take the settings from codec node.
100 		 */
101 		dev_dbg(dev, "Revert to legacy daifmt parsing\n");
102 
103 		daifmt |= snd_soc_daifmt_parse_clock_provider_as_flag(codec, NULL);
104 	} else {
105 		daifmt |= snd_soc_daifmt_clock_provider_from_bitmap(
106 				((codec == bitclkmaster) << 4) | (codec == framemaster));
107 	}
108 
109 	of_node_put(bitclkmaster);
110 	of_node_put(framemaster);
111 
112 	*retfmt = daifmt;
113 
114 	return 0;
115 }
116 EXPORT_SYMBOL_GPL(asoc_simple_parse_daifmt);
117 
118 int asoc_simple_parse_tdm_width_map(struct device *dev, struct device_node *np,
119 				    struct asoc_simple_dai *dai)
120 {
121 	u32 *array_values, *p;
122 	int n, i, ret;
123 
124 	if (!of_property_read_bool(np, "dai-tdm-slot-width-map"))
125 		return 0;
126 
127 	n = of_property_count_elems_of_size(np, "dai-tdm-slot-width-map", sizeof(u32));
128 	if (n % 3) {
129 		dev_err(dev, "Invalid number of cells for dai-tdm-slot-width-map\n");
130 		return -EINVAL;
131 	}
132 
133 	dai->tdm_width_map = devm_kcalloc(dev, n, sizeof(*dai->tdm_width_map), GFP_KERNEL);
134 	if (!dai->tdm_width_map)
135 		return -ENOMEM;
136 
137 	array_values = kcalloc(n, sizeof(*array_values), GFP_KERNEL);
138 	if (!array_values)
139 		return -ENOMEM;
140 
141 	ret = of_property_read_u32_array(np, "dai-tdm-slot-width-map", array_values, n);
142 	if (ret < 0) {
143 		dev_err(dev, "Could not read dai-tdm-slot-width-map: %d\n", ret);
144 		goto out;
145 	}
146 
147 	p = array_values;
148 	for (i = 0; i < n / 3; ++i) {
149 		dai->tdm_width_map[i].sample_bits = *p++;
150 		dai->tdm_width_map[i].slot_width = *p++;
151 		dai->tdm_width_map[i].slot_count = *p++;
152 	}
153 
154 	dai->n_tdm_widths = i;
155 	ret = 0;
156 out:
157 	kfree(array_values);
158 
159 	return ret;
160 }
161 EXPORT_SYMBOL_GPL(asoc_simple_parse_tdm_width_map);
162 
163 int asoc_simple_set_dailink_name(struct device *dev,
164 				 struct snd_soc_dai_link *dai_link,
165 				 const char *fmt, ...)
166 {
167 	va_list ap;
168 	char *name = NULL;
169 	int ret = -ENOMEM;
170 
171 	va_start(ap, fmt);
172 	name = devm_kvasprintf(dev, GFP_KERNEL, fmt, ap);
173 	va_end(ap);
174 
175 	if (name) {
176 		ret = 0;
177 
178 		dai_link->name		= name;
179 		dai_link->stream_name	= name;
180 	}
181 
182 	return ret;
183 }
184 EXPORT_SYMBOL_GPL(asoc_simple_set_dailink_name);
185 
186 int asoc_simple_parse_card_name(struct snd_soc_card *card,
187 				char *prefix)
188 {
189 	int ret;
190 
191 	if (!prefix)
192 		prefix = "";
193 
194 	/* Parse the card name from DT */
195 	ret = snd_soc_of_parse_card_name(card, "label");
196 	if (ret < 0 || !card->name) {
197 		char prop[128];
198 
199 		snprintf(prop, sizeof(prop), "%sname", prefix);
200 		ret = snd_soc_of_parse_card_name(card, prop);
201 		if (ret < 0)
202 			return ret;
203 	}
204 
205 	if (!card->name && card->dai_link)
206 		card->name = card->dai_link->name;
207 
208 	return 0;
209 }
210 EXPORT_SYMBOL_GPL(asoc_simple_parse_card_name);
211 
212 static int asoc_simple_clk_enable(struct asoc_simple_dai *dai)
213 {
214 	if (dai)
215 		return clk_prepare_enable(dai->clk);
216 
217 	return 0;
218 }
219 
220 static void asoc_simple_clk_disable(struct asoc_simple_dai *dai)
221 {
222 	if (dai)
223 		clk_disable_unprepare(dai->clk);
224 }
225 
226 int asoc_simple_parse_clk(struct device *dev,
227 			  struct device_node *node,
228 			  struct asoc_simple_dai *simple_dai,
229 			  struct snd_soc_dai_link_component *dlc)
230 {
231 	struct clk *clk;
232 	u32 val;
233 
234 	/*
235 	 * Parse dai->sysclk come from "clocks = <&xxx>"
236 	 * (if system has common clock)
237 	 *  or "system-clock-frequency = <xxx>"
238 	 *  or device's module clock.
239 	 */
240 	clk = devm_get_clk_from_child(dev, node, NULL);
241 	simple_dai->clk_fixed = of_property_read_bool(
242 		node, "system-clock-fixed");
243 	if (!IS_ERR(clk)) {
244 		simple_dai->sysclk = clk_get_rate(clk);
245 
246 		simple_dai->clk = clk;
247 	} else if (!of_property_read_u32(node, "system-clock-frequency", &val)) {
248 		simple_dai->sysclk = val;
249 		simple_dai->clk_fixed = true;
250 	} else {
251 		clk = devm_get_clk_from_child(dev, dlc->of_node, NULL);
252 		if (!IS_ERR(clk))
253 			simple_dai->sysclk = clk_get_rate(clk);
254 	}
255 
256 	if (of_property_read_bool(node, "system-clock-direction-out"))
257 		simple_dai->clk_direction = SND_SOC_CLOCK_OUT;
258 
259 	return 0;
260 }
261 EXPORT_SYMBOL_GPL(asoc_simple_parse_clk);
262 
263 static int asoc_simple_check_fixed_sysclk(struct device *dev,
264 					  struct asoc_simple_dai *dai,
265 					  unsigned int *fixed_sysclk)
266 {
267 	if (dai->clk_fixed) {
268 		if (*fixed_sysclk && *fixed_sysclk != dai->sysclk) {
269 			dev_err(dev, "inconsistent fixed sysclk rates (%u vs %u)\n",
270 				*fixed_sysclk, dai->sysclk);
271 			return -EINVAL;
272 		}
273 		*fixed_sysclk = dai->sysclk;
274 	}
275 
276 	return 0;
277 }
278 
279 int asoc_simple_startup(struct snd_pcm_substream *substream)
280 {
281 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
282 	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
283 	struct simple_dai_props *props = simple_priv_to_props(priv, rtd->num);
284 	struct asoc_simple_dai *dai;
285 	unsigned int fixed_sysclk = 0;
286 	int i1, i2, i;
287 	int ret;
288 
289 	for_each_prop_dai_cpu(props, i1, dai) {
290 		ret = asoc_simple_clk_enable(dai);
291 		if (ret)
292 			goto cpu_err;
293 		ret = asoc_simple_check_fixed_sysclk(rtd->dev, dai, &fixed_sysclk);
294 		if (ret)
295 			goto cpu_err;
296 	}
297 
298 	for_each_prop_dai_codec(props, i2, dai) {
299 		ret = asoc_simple_clk_enable(dai);
300 		if (ret)
301 			goto codec_err;
302 		ret = asoc_simple_check_fixed_sysclk(rtd->dev, dai, &fixed_sysclk);
303 		if (ret)
304 			goto codec_err;
305 	}
306 
307 	if (fixed_sysclk && props->mclk_fs) {
308 		unsigned int fixed_rate = fixed_sysclk / props->mclk_fs;
309 
310 		if (fixed_sysclk % props->mclk_fs) {
311 			dev_err(rtd->dev, "fixed sysclk %u not divisible by mclk_fs %u\n",
312 				fixed_sysclk, props->mclk_fs);
313 			return -EINVAL;
314 		}
315 		ret = snd_pcm_hw_constraint_minmax(substream->runtime, SNDRV_PCM_HW_PARAM_RATE,
316 			fixed_rate, fixed_rate);
317 		if (ret < 0)
318 			goto codec_err;
319 	}
320 
321 	return 0;
322 
323 codec_err:
324 	for_each_prop_dai_codec(props, i, dai) {
325 		if (i >= i2)
326 			break;
327 		asoc_simple_clk_disable(dai);
328 	}
329 cpu_err:
330 	for_each_prop_dai_cpu(props, i, dai) {
331 		if (i >= i1)
332 			break;
333 		asoc_simple_clk_disable(dai);
334 	}
335 	return ret;
336 }
337 EXPORT_SYMBOL_GPL(asoc_simple_startup);
338 
339 void asoc_simple_shutdown(struct snd_pcm_substream *substream)
340 {
341 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
342 	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
343 	struct simple_dai_props *props = simple_priv_to_props(priv, rtd->num);
344 	struct asoc_simple_dai *dai;
345 	int i;
346 
347 	for_each_prop_dai_cpu(props, i, dai) {
348 		struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, i);
349 
350 		if (props->mclk_fs && !dai->clk_fixed && !snd_soc_dai_active(cpu_dai))
351 			snd_soc_dai_set_sysclk(cpu_dai,
352 					       0, 0, SND_SOC_CLOCK_OUT);
353 
354 		asoc_simple_clk_disable(dai);
355 	}
356 	for_each_prop_dai_codec(props, i, dai) {
357 		struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, i);
358 
359 		if (props->mclk_fs && !dai->clk_fixed && !snd_soc_dai_active(codec_dai))
360 			snd_soc_dai_set_sysclk(codec_dai,
361 					       0, 0, SND_SOC_CLOCK_IN);
362 
363 		asoc_simple_clk_disable(dai);
364 	}
365 }
366 EXPORT_SYMBOL_GPL(asoc_simple_shutdown);
367 
368 static int asoc_simple_set_clk_rate(struct device *dev,
369 				    struct asoc_simple_dai *simple_dai,
370 				    unsigned long rate)
371 {
372 	if (!simple_dai)
373 		return 0;
374 
375 	if (simple_dai->clk_fixed && rate != simple_dai->sysclk) {
376 		dev_err(dev, "dai %s invalid clock rate %lu\n", simple_dai->name, rate);
377 		return -EINVAL;
378 	}
379 
380 	if (!simple_dai->clk)
381 		return 0;
382 
383 	if (clk_get_rate(simple_dai->clk) == rate)
384 		return 0;
385 
386 	return clk_set_rate(simple_dai->clk, rate);
387 }
388 
389 static int asoc_simple_set_tdm(struct snd_soc_dai *dai,
390 				struct asoc_simple_dai *simple_dai,
391 				struct snd_pcm_hw_params *params)
392 {
393 	int sample_bits = params_width(params);
394 	int slot_width, slot_count;
395 	int i, ret;
396 
397 	if (!simple_dai || !simple_dai->tdm_width_map)
398 		return 0;
399 
400 	slot_width = simple_dai->slot_width;
401 	slot_count = simple_dai->slots;
402 
403 	if (slot_width == 0)
404 		slot_width = sample_bits;
405 
406 	for (i = 0; i < simple_dai->n_tdm_widths; ++i) {
407 		if (simple_dai->tdm_width_map[i].sample_bits == sample_bits) {
408 			slot_width = simple_dai->tdm_width_map[i].slot_width;
409 			slot_count = simple_dai->tdm_width_map[i].slot_count;
410 			break;
411 		}
412 	}
413 
414 	ret = snd_soc_dai_set_tdm_slot(dai,
415 				       simple_dai->tx_slot_mask,
416 				       simple_dai->rx_slot_mask,
417 				       slot_count,
418 				       slot_width);
419 	if (ret && ret != -ENOTSUPP) {
420 		dev_err(dai->dev, "simple-card: set_tdm_slot error: %d\n", ret);
421 		return ret;
422 	}
423 
424 	return 0;
425 }
426 
427 int asoc_simple_hw_params(struct snd_pcm_substream *substream,
428 			  struct snd_pcm_hw_params *params)
429 {
430 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
431 	struct asoc_simple_dai *pdai;
432 	struct snd_soc_dai *sdai;
433 	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
434 	struct simple_dai_props *props = simple_priv_to_props(priv, rtd->num);
435 	unsigned int mclk, mclk_fs = 0;
436 	int i, ret;
437 
438 	if (props->mclk_fs)
439 		mclk_fs = props->mclk_fs;
440 
441 	if (mclk_fs) {
442 		struct snd_soc_component *component;
443 		mclk = params_rate(params) * mclk_fs;
444 
445 		for_each_prop_dai_codec(props, i, pdai) {
446 			ret = asoc_simple_set_clk_rate(rtd->dev, pdai, mclk);
447 			if (ret < 0)
448 				return ret;
449 		}
450 
451 		for_each_prop_dai_cpu(props, i, pdai) {
452 			ret = asoc_simple_set_clk_rate(rtd->dev, pdai, mclk);
453 			if (ret < 0)
454 				return ret;
455 		}
456 
457 		/* Ensure sysclk is set on all components in case any
458 		 * (such as platform components) are missed by calls to
459 		 * snd_soc_dai_set_sysclk.
460 		 */
461 		for_each_rtd_components(rtd, i, component) {
462 			ret = snd_soc_component_set_sysclk(component, 0, 0,
463 							   mclk, SND_SOC_CLOCK_IN);
464 			if (ret && ret != -ENOTSUPP)
465 				return ret;
466 		}
467 
468 		for_each_rtd_codec_dais(rtd, i, sdai) {
469 			ret = snd_soc_dai_set_sysclk(sdai, 0, mclk, SND_SOC_CLOCK_IN);
470 			if (ret && ret != -ENOTSUPP)
471 				return ret;
472 		}
473 
474 		for_each_rtd_cpu_dais(rtd, i, sdai) {
475 			ret = snd_soc_dai_set_sysclk(sdai, 0, mclk, SND_SOC_CLOCK_OUT);
476 			if (ret && ret != -ENOTSUPP)
477 				return ret;
478 		}
479 	}
480 
481 	for_each_prop_dai_codec(props, i, pdai) {
482 		sdai = asoc_rtd_to_codec(rtd, i);
483 		ret = asoc_simple_set_tdm(sdai, pdai, params);
484 		if (ret < 0)
485 			return ret;
486 	}
487 
488 	for_each_prop_dai_cpu(props, i, pdai) {
489 		sdai = asoc_rtd_to_cpu(rtd, i);
490 		ret = asoc_simple_set_tdm(sdai, pdai, params);
491 		if (ret < 0)
492 			return ret;
493 	}
494 
495 	return 0;
496 }
497 EXPORT_SYMBOL_GPL(asoc_simple_hw_params);
498 
499 int asoc_simple_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
500 				   struct snd_pcm_hw_params *params)
501 {
502 	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
503 	struct simple_dai_props *dai_props = simple_priv_to_props(priv, rtd->num);
504 	struct asoc_simple_data *data = &dai_props->adata;
505 	struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
506 	struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
507 
508 	if (data->convert_rate)
509 		rate->min =
510 		rate->max = data->convert_rate;
511 
512 	if (data->convert_channels)
513 		channels->min =
514 		channels->max = data->convert_channels;
515 
516 	if (data->convert_sample_format)
517 		asoc_simple_fixup_sample_fmt(data, params);
518 
519 	return 0;
520 }
521 EXPORT_SYMBOL_GPL(asoc_simple_be_hw_params_fixup);
522 
523 static int asoc_simple_init_dai(struct snd_soc_dai *dai,
524 				     struct asoc_simple_dai *simple_dai)
525 {
526 	int ret;
527 
528 	if (!simple_dai)
529 		return 0;
530 
531 	if (simple_dai->sysclk) {
532 		ret = snd_soc_dai_set_sysclk(dai, 0, simple_dai->sysclk,
533 					     simple_dai->clk_direction);
534 		if (ret && ret != -ENOTSUPP) {
535 			dev_err(dai->dev, "simple-card: set_sysclk error\n");
536 			return ret;
537 		}
538 	}
539 
540 	if (simple_dai->slots) {
541 		ret = snd_soc_dai_set_tdm_slot(dai,
542 					       simple_dai->tx_slot_mask,
543 					       simple_dai->rx_slot_mask,
544 					       simple_dai->slots,
545 					       simple_dai->slot_width);
546 		if (ret && ret != -ENOTSUPP) {
547 			dev_err(dai->dev, "simple-card: set_tdm_slot error\n");
548 			return ret;
549 		}
550 	}
551 
552 	return 0;
553 }
554 
555 static inline int asoc_simple_component_is_codec(struct snd_soc_component *component)
556 {
557 	return component->driver->endianness;
558 }
559 
560 static int asoc_simple_init_for_codec2codec(struct snd_soc_pcm_runtime *rtd,
561 					    struct simple_dai_props *dai_props)
562 {
563 	struct snd_soc_dai_link *dai_link = rtd->dai_link;
564 	struct snd_soc_component *component;
565 	struct snd_soc_pcm_stream *c2c_params;
566 	struct snd_pcm_hardware hw;
567 	int i, ret, stream;
568 
569 	/* Do nothing if it already has Codec2Codec settings */
570 	if (dai_link->c2c_params)
571 		return 0;
572 
573 	/* Do nothing if it was DPCM :: BE */
574 	if (dai_link->no_pcm)
575 		return 0;
576 
577 	/* Only Codecs */
578 	for_each_rtd_components(rtd, i, component) {
579 		if (!asoc_simple_component_is_codec(component))
580 			return 0;
581 	}
582 
583 	/* Assumes the capabilities are the same for all supported streams */
584 	for_each_pcm_streams(stream) {
585 		ret = snd_soc_runtime_calc_hw(rtd, &hw, stream);
586 		if (ret == 0)
587 			break;
588 	}
589 
590 	if (ret < 0) {
591 		dev_err(rtd->dev, "simple-card: no valid dai_link params\n");
592 		return ret;
593 	}
594 
595 	c2c_params = devm_kzalloc(rtd->dev, sizeof(*c2c_params), GFP_KERNEL);
596 	if (!c2c_params)
597 		return -ENOMEM;
598 
599 	c2c_params->formats		= hw.formats;
600 	c2c_params->rates		= hw.rates;
601 	c2c_params->rate_min		= hw.rate_min;
602 	c2c_params->rate_max		= hw.rate_max;
603 	c2c_params->channels_min	= hw.channels_min;
604 	c2c_params->channels_max	= hw.channels_max;
605 
606 	dai_link->c2c_params		= c2c_params;
607 	dai_link->num_c2c_params	= 1;
608 
609 	return 0;
610 }
611 
612 int asoc_simple_dai_init(struct snd_soc_pcm_runtime *rtd)
613 {
614 	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
615 	struct simple_dai_props *props = simple_priv_to_props(priv, rtd->num);
616 	struct asoc_simple_dai *dai;
617 	int i, ret;
618 
619 	for_each_prop_dai_codec(props, i, dai) {
620 		ret = asoc_simple_init_dai(asoc_rtd_to_codec(rtd, i), dai);
621 		if (ret < 0)
622 			return ret;
623 	}
624 	for_each_prop_dai_cpu(props, i, dai) {
625 		ret = asoc_simple_init_dai(asoc_rtd_to_cpu(rtd, i), dai);
626 		if (ret < 0)
627 			return ret;
628 	}
629 
630 	ret = asoc_simple_init_for_codec2codec(rtd, props);
631 	if (ret < 0)
632 		return ret;
633 
634 	return 0;
635 }
636 EXPORT_SYMBOL_GPL(asoc_simple_dai_init);
637 
638 void asoc_simple_canonicalize_platform(struct snd_soc_dai_link_component *platforms,
639 				       struct snd_soc_dai_link_component *cpus)
640 {
641 	/*
642 	 * Assumes Platform == CPU
643 	 *
644 	 * Some CPU might be using soc-generic-dmaengine-pcm. This means CPU and Platform
645 	 * are different Component, but are sharing same component->dev.
646 	 *
647 	 * Let's assume Platform is same as CPU if it doesn't identify Platform on DT.
648 	 * see
649 	 *	simple-card.c :: simple_count_noml()
650 	 */
651 	if (!platforms->of_node)
652 		platforms->of_node = cpus->of_node;
653 }
654 EXPORT_SYMBOL_GPL(asoc_simple_canonicalize_platform);
655 
656 void asoc_simple_canonicalize_cpu(struct snd_soc_dai_link_component *cpus,
657 				  int is_single_links)
658 {
659 	/*
660 	 * In soc_bind_dai_link() will check cpu name after
661 	 * of_node matching if dai_link has cpu_dai_name.
662 	 * but, it will never match if name was created by
663 	 * fmt_single_name() remove cpu_dai_name if cpu_args
664 	 * was 0. See:
665 	 *	fmt_single_name()
666 	 *	fmt_multiple_name()
667 	 */
668 	if (is_single_links)
669 		cpus->dai_name = NULL;
670 }
671 EXPORT_SYMBOL_GPL(asoc_simple_canonicalize_cpu);
672 
673 void asoc_simple_clean_reference(struct snd_soc_card *card)
674 {
675 	struct snd_soc_dai_link *dai_link;
676 	struct snd_soc_dai_link_component *cpu;
677 	struct snd_soc_dai_link_component *codec;
678 	int i, j;
679 
680 	for_each_card_prelinks(card, i, dai_link) {
681 		for_each_link_cpus(dai_link, j, cpu)
682 			of_node_put(cpu->of_node);
683 		for_each_link_codecs(dai_link, j, codec)
684 			of_node_put(codec->of_node);
685 	}
686 }
687 EXPORT_SYMBOL_GPL(asoc_simple_clean_reference);
688 
689 int asoc_simple_parse_routing(struct snd_soc_card *card,
690 			      char *prefix)
691 {
692 	struct device_node *node = card->dev->of_node;
693 	char prop[128];
694 
695 	if (!prefix)
696 		prefix = "";
697 
698 	snprintf(prop, sizeof(prop), "%s%s", prefix, "routing");
699 
700 	if (!of_property_read_bool(node, prop))
701 		return 0;
702 
703 	return snd_soc_of_parse_audio_routing(card, prop);
704 }
705 EXPORT_SYMBOL_GPL(asoc_simple_parse_routing);
706 
707 int asoc_simple_parse_widgets(struct snd_soc_card *card,
708 			      char *prefix)
709 {
710 	struct device_node *node = card->dev->of_node;
711 	char prop[128];
712 
713 	if (!prefix)
714 		prefix = "";
715 
716 	snprintf(prop, sizeof(prop), "%s%s", prefix, "widgets");
717 
718 	if (of_property_read_bool(node, prop))
719 		return snd_soc_of_parse_audio_simple_widgets(card, prop);
720 
721 	/* no widgets is not error */
722 	return 0;
723 }
724 EXPORT_SYMBOL_GPL(asoc_simple_parse_widgets);
725 
726 int asoc_simple_parse_pin_switches(struct snd_soc_card *card,
727 				   char *prefix)
728 {
729 	char prop[128];
730 
731 	if (!prefix)
732 		prefix = "";
733 
734 	snprintf(prop, sizeof(prop), "%s%s", prefix, "pin-switches");
735 
736 	return snd_soc_of_parse_pin_switches(card, prop);
737 }
738 EXPORT_SYMBOL_GPL(asoc_simple_parse_pin_switches);
739 
740 int asoc_simple_init_jack(struct snd_soc_card *card,
741 			  struct asoc_simple_jack *sjack,
742 			  int is_hp, char *prefix,
743 			  char *pin)
744 {
745 	struct device *dev = card->dev;
746 	struct gpio_desc *desc;
747 	char prop[128];
748 	char *pin_name;
749 	char *gpio_name;
750 	int mask;
751 	int error;
752 
753 	if (!prefix)
754 		prefix = "";
755 
756 	sjack->gpio.gpio = -ENOENT;
757 
758 	if (is_hp) {
759 		snprintf(prop, sizeof(prop), "%shp-det", prefix);
760 		pin_name	= pin ? pin : "Headphones";
761 		gpio_name	= "Headphone detection";
762 		mask		= SND_JACK_HEADPHONE;
763 	} else {
764 		snprintf(prop, sizeof(prop), "%smic-det", prefix);
765 		pin_name	= pin ? pin : "Mic Jack";
766 		gpio_name	= "Mic detection";
767 		mask		= SND_JACK_MICROPHONE;
768 	}
769 
770 	desc = gpiod_get_optional(dev, prop, GPIOD_IN);
771 	error = PTR_ERR_OR_ZERO(desc);
772 	if (error)
773 		return error;
774 
775 	if (desc) {
776 		error = gpiod_set_consumer_name(desc, gpio_name);
777 		if (error)
778 			return error;
779 
780 		sjack->pin.pin		= pin_name;
781 		sjack->pin.mask		= mask;
782 
783 		sjack->gpio.name	= gpio_name;
784 		sjack->gpio.report	= mask;
785 		sjack->gpio.desc	= desc;
786 		sjack->gpio.debounce_time = 150;
787 
788 		snd_soc_card_jack_new_pins(card, pin_name, mask, &sjack->jack,
789 					   &sjack->pin, 1);
790 
791 		snd_soc_jack_add_gpios(&sjack->jack, 1, &sjack->gpio);
792 	}
793 
794 	return 0;
795 }
796 EXPORT_SYMBOL_GPL(asoc_simple_init_jack);
797 
798 int asoc_simple_init_aux_jacks(struct asoc_simple_priv *priv, char *prefix)
799 {
800 	struct snd_soc_card *card = simple_priv_to_card(priv);
801 	struct snd_soc_component *component;
802 	int found_jack_index = 0;
803 	int type = 0;
804 	int num = 0;
805 	int ret;
806 
807 	if (priv->aux_jacks)
808 		return 0;
809 
810 	for_each_card_auxs(card, component) {
811 		type = snd_soc_component_get_jack_type(component);
812 		if (type > 0)
813 			num++;
814 	}
815 	if (num < 1)
816 		return 0;
817 
818 	priv->aux_jacks = devm_kcalloc(card->dev, num,
819 				       sizeof(struct snd_soc_jack), GFP_KERNEL);
820 	if (!priv->aux_jacks)
821 		return -ENOMEM;
822 
823 	for_each_card_auxs(card, component) {
824 		char id[128];
825 		struct snd_soc_jack *jack;
826 
827 		if (found_jack_index >= num)
828 			break;
829 
830 		type = snd_soc_component_get_jack_type(component);
831 		if (type <= 0)
832 			continue;
833 
834 		/* create jack */
835 		jack = &(priv->aux_jacks[found_jack_index++]);
836 		snprintf(id, sizeof(id), "%s-jack", component->name);
837 		ret = snd_soc_card_jack_new(card, id, type, jack);
838 		if (ret)
839 			continue;
840 
841 		(void)snd_soc_component_set_jack(component, jack, NULL);
842 	}
843 	return 0;
844 }
845 EXPORT_SYMBOL_GPL(asoc_simple_init_aux_jacks);
846 
847 int asoc_simple_init_priv(struct asoc_simple_priv *priv,
848 			  struct link_info *li)
849 {
850 	struct snd_soc_card *card = simple_priv_to_card(priv);
851 	struct device *dev = simple_priv_to_dev(priv);
852 	struct snd_soc_dai_link *dai_link;
853 	struct simple_dai_props *dai_props;
854 	struct asoc_simple_dai *dais;
855 	struct snd_soc_dai_link_component *dlcs;
856 	struct snd_soc_codec_conf *cconf = NULL;
857 	int i, dai_num = 0, dlc_num = 0, cnf_num = 0;
858 
859 	dai_props = devm_kcalloc(dev, li->link, sizeof(*dai_props), GFP_KERNEL);
860 	dai_link  = devm_kcalloc(dev, li->link, sizeof(*dai_link),  GFP_KERNEL);
861 	if (!dai_props || !dai_link)
862 		return -ENOMEM;
863 
864 	/*
865 	 * dais (= CPU+Codec)
866 	 * dlcs (= CPU+Codec+Platform)
867 	 */
868 	for (i = 0; i < li->link; i++) {
869 		int cc = li->num[i].cpus + li->num[i].codecs;
870 
871 		dai_num += cc;
872 		dlc_num += cc + li->num[i].platforms;
873 
874 		if (!li->num[i].cpus)
875 			cnf_num += li->num[i].codecs;
876 	}
877 
878 	dais = devm_kcalloc(dev, dai_num, sizeof(*dais), GFP_KERNEL);
879 	dlcs = devm_kcalloc(dev, dlc_num, sizeof(*dlcs), GFP_KERNEL);
880 	if (!dais || !dlcs)
881 		return -ENOMEM;
882 
883 	if (cnf_num) {
884 		cconf = devm_kcalloc(dev, cnf_num, sizeof(*cconf), GFP_KERNEL);
885 		if (!cconf)
886 			return -ENOMEM;
887 	}
888 
889 	dev_dbg(dev, "link %d, dais %d, ccnf %d\n",
890 		li->link, dai_num, cnf_num);
891 
892 	priv->dai_props		= dai_props;
893 	priv->dai_link		= dai_link;
894 	priv->dais		= dais;
895 	priv->dlcs		= dlcs;
896 	priv->codec_conf	= cconf;
897 
898 	card->dai_link		= priv->dai_link;
899 	card->num_links		= li->link;
900 	card->codec_conf	= cconf;
901 	card->num_configs	= cnf_num;
902 
903 	for (i = 0; i < li->link; i++) {
904 		if (li->num[i].cpus) {
905 			/* Normal CPU */
906 			dai_link[i].cpus	= dlcs;
907 			dai_props[i].num.cpus	=
908 			dai_link[i].num_cpus	= li->num[i].cpus;
909 			dai_props[i].cpu_dai	= dais;
910 
911 			dlcs += li->num[i].cpus;
912 			dais += li->num[i].cpus;
913 		} else {
914 			/* DPCM Be's CPU = dummy */
915 			dai_link[i].cpus	= &asoc_dummy_dlc;
916 			dai_props[i].num.cpus	=
917 			dai_link[i].num_cpus	= 1;
918 		}
919 
920 		if (li->num[i].codecs) {
921 			/* Normal Codec */
922 			dai_link[i].codecs	= dlcs;
923 			dai_props[i].num.codecs	=
924 			dai_link[i].num_codecs	= li->num[i].codecs;
925 			dai_props[i].codec_dai	= dais;
926 
927 			dlcs += li->num[i].codecs;
928 			dais += li->num[i].codecs;
929 
930 			if (!li->num[i].cpus) {
931 				/* DPCM Be's Codec */
932 				dai_props[i].codec_conf = cconf;
933 				cconf += li->num[i].codecs;
934 			}
935 		} else {
936 			/* DPCM Fe's Codec = dummy */
937 			dai_link[i].codecs	= &asoc_dummy_dlc;
938 			dai_props[i].num.codecs	=
939 			dai_link[i].num_codecs	= 1;
940 		}
941 
942 		if (li->num[i].platforms) {
943 			/* Have Platform */
944 			dai_link[i].platforms		= dlcs;
945 			dai_props[i].num.platforms	=
946 			dai_link[i].num_platforms	= li->num[i].platforms;
947 
948 			dlcs += li->num[i].platforms;
949 		} else {
950 			/* Doesn't have Platform */
951 			dai_link[i].platforms		= NULL;
952 			dai_props[i].num.platforms	=
953 			dai_link[i].num_platforms	= 0;
954 		}
955 	}
956 
957 	return 0;
958 }
959 EXPORT_SYMBOL_GPL(asoc_simple_init_priv);
960 
961 int asoc_simple_remove(struct platform_device *pdev)
962 {
963 	struct snd_soc_card *card = platform_get_drvdata(pdev);
964 
965 	asoc_simple_clean_reference(card);
966 
967 	return 0;
968 }
969 EXPORT_SYMBOL_GPL(asoc_simple_remove);
970 
971 int asoc_graph_card_probe(struct snd_soc_card *card)
972 {
973 	struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(card);
974 	int ret;
975 
976 	ret = asoc_simple_init_hp(card, &priv->hp_jack, NULL);
977 	if (ret < 0)
978 		return ret;
979 
980 	ret = asoc_simple_init_mic(card, &priv->mic_jack, NULL);
981 	if (ret < 0)
982 		return ret;
983 
984 	return 0;
985 }
986 EXPORT_SYMBOL_GPL(asoc_graph_card_probe);
987 
988 int asoc_graph_is_ports0(struct device_node *np)
989 {
990 	struct device_node *port, *ports, *ports0, *top;
991 	int ret;
992 
993 	/* np is "endpoint" or "port" */
994 	if (of_node_name_eq(np, "endpoint")) {
995 		port = of_get_parent(np);
996 	} else {
997 		port = np;
998 		of_node_get(port);
999 	}
1000 
1001 	ports	= of_get_parent(port);
1002 	top	= of_get_parent(ports);
1003 	ports0	= of_get_child_by_name(top, "ports");
1004 
1005 	ret = ports0 == ports;
1006 
1007 	of_node_put(port);
1008 	of_node_put(ports);
1009 	of_node_put(ports0);
1010 	of_node_put(top);
1011 
1012 	return ret;
1013 }
1014 EXPORT_SYMBOL_GPL(asoc_graph_is_ports0);
1015 
1016 static int graph_get_dai_id(struct device_node *ep)
1017 {
1018 	struct device_node *node;
1019 	struct device_node *endpoint;
1020 	struct of_endpoint info;
1021 	int i, id;
1022 	int ret;
1023 
1024 	/* use driver specified DAI ID if exist */
1025 	ret = snd_soc_get_dai_id(ep);
1026 	if (ret != -ENOTSUPP)
1027 		return ret;
1028 
1029 	/* use endpoint/port reg if exist */
1030 	ret = of_graph_parse_endpoint(ep, &info);
1031 	if (ret == 0) {
1032 		/*
1033 		 * Because it will count port/endpoint if it doesn't have "reg".
1034 		 * But, we can't judge whether it has "no reg", or "reg = <0>"
1035 		 * only of_graph_parse_endpoint().
1036 		 * We need to check "reg" property
1037 		 */
1038 		if (of_property_present(ep,   "reg"))
1039 			return info.id;
1040 
1041 		node = of_get_parent(ep);
1042 		ret = of_property_present(node, "reg");
1043 		of_node_put(node);
1044 		if (ret)
1045 			return info.port;
1046 	}
1047 	node = of_graph_get_port_parent(ep);
1048 
1049 	/*
1050 	 * Non HDMI sound case, counting port/endpoint on its DT
1051 	 * is enough. Let's count it.
1052 	 */
1053 	i = 0;
1054 	id = -1;
1055 	for_each_endpoint_of_node(node, endpoint) {
1056 		if (endpoint == ep)
1057 			id = i;
1058 		i++;
1059 	}
1060 
1061 	of_node_put(node);
1062 
1063 	if (id < 0)
1064 		return -ENODEV;
1065 
1066 	return id;
1067 }
1068 
1069 int asoc_graph_parse_dai(struct device_node *ep,
1070 			 struct snd_soc_dai_link_component *dlc,
1071 			 int *is_single_link)
1072 {
1073 	struct device_node *node;
1074 	struct of_phandle_args args = {};
1075 	int ret;
1076 
1077 	if (!ep)
1078 		return 0;
1079 
1080 	node = of_graph_get_port_parent(ep);
1081 
1082 	/* Get dai->name */
1083 	args.np		= node;
1084 	args.args[0]	= graph_get_dai_id(ep);
1085 	args.args_count	= (of_graph_get_endpoint_count(node) > 1);
1086 
1087 	/*
1088 	 * FIXME
1089 	 *
1090 	 * Here, dlc->dai_name is pointer to CPU/Codec DAI name.
1091 	 * If user unbinded CPU or Codec driver, but not for Sound Card,
1092 	 * dlc->dai_name is keeping unbinded CPU or Codec
1093 	 * driver's pointer.
1094 	 *
1095 	 * If user re-bind CPU or Codec driver again, ALSA SoC will try
1096 	 * to rebind Card via snd_soc_try_rebind_card(), but because of
1097 	 * above reason, it might can't bind Sound Card.
1098 	 * Because Sound Card is pointing to released dai_name pointer.
1099 	 *
1100 	 * To avoid this rebind Card issue,
1101 	 * 1) It needs to alloc memory to keep dai_name eventhough
1102 	 *    CPU or Codec driver was unbinded, or
1103 	 * 2) user need to rebind Sound Card everytime
1104 	 *    if he unbinded CPU or Codec.
1105 	 */
1106 	ret = snd_soc_get_dlc(&args, dlc);
1107 	if (ret < 0) {
1108 		of_node_put(node);
1109 		return ret;
1110 	}
1111 
1112 	if (is_single_link)
1113 		*is_single_link = of_graph_get_endpoint_count(node) == 1;
1114 
1115 	return 0;
1116 }
1117 EXPORT_SYMBOL_GPL(asoc_graph_parse_dai);
1118 
1119 /* Module information */
1120 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1121 MODULE_DESCRIPTION("ALSA SoC Simple Card Utils");
1122 MODULE_LICENSE("GPL v2");
1123