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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_gpio.h>
13#include <linux/of_graph.h>
14#include <sound/jack.h>
15#include <sound/simple_card_utils.h>
16
17void asoc_simple_convert_fixup(struct asoc_simple_data *data,
18 struct snd_pcm_hw_params *params)
19{
20 struct snd_interval *rate = hw_param_interval(params,
21 SNDRV_PCM_HW_PARAM_RATE);
22 struct snd_interval *channels = hw_param_interval(params,
23 SNDRV_PCM_HW_PARAM_CHANNELS);
24
25 if (data->convert_rate)
26 rate->min =
27 rate->max = data->convert_rate;
28
29 if (data->convert_channels)
30 channels->min =
31 channels->max = data->convert_channels;
32}
33EXPORT_SYMBOL_GPL(asoc_simple_convert_fixup);
34
35void asoc_simple_parse_convert(struct device *dev,
36 struct device_node *np,
37 char *prefix,
38 struct asoc_simple_data *data)
39{
40 char prop[128];
41
42 if (!prefix)
43 prefix = "";
44
45 /* sampling rate convert */
46 snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-rate");
47 of_property_read_u32(np, prop, &data->convert_rate);
48
49 /* channels transfer */
50 snprintf(prop, sizeof(prop), "%s%s", prefix, "convert-channels");
51 of_property_read_u32(np, prop, &data->convert_channels);
52}
53EXPORT_SYMBOL_GPL(asoc_simple_parse_convert);
54
55int asoc_simple_parse_daifmt(struct device *dev,
56 struct device_node *node,
57 struct device_node *codec,
58 char *prefix,
59 unsigned int *retfmt)
60{
61 struct device_node *bitclkmaster = NULL;
62 struct device_node *framemaster = NULL;
63 unsigned int daifmt;
64
65 daifmt = snd_soc_of_parse_daifmt(node, prefix,
66 &bitclkmaster, &framemaster);
67 daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
68
69 if (!bitclkmaster && !framemaster) {
70 /*
71 * No dai-link level and master setting was not found from
72 * sound node level, revert back to legacy DT parsing and
73 * take the settings from codec node.
74 */
75 dev_dbg(dev, "Revert to legacy daifmt parsing\n");
76
77 daifmt = snd_soc_of_parse_daifmt(codec, NULL, NULL, NULL) |
78 (daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK);
79 } else {
80 if (codec == bitclkmaster)
81 daifmt |= (codec == framemaster) ?
82 SND_SOC_DAIFMT_CBM_CFM : SND_SOC_DAIFMT_CBM_CFS;
83 else
84 daifmt |= (codec == framemaster) ?
85 SND_SOC_DAIFMT_CBS_CFM : SND_SOC_DAIFMT_CBS_CFS;
86 }
87
88 of_node_put(bitclkmaster);
89 of_node_put(framemaster);
90
91 *retfmt = daifmt;
92
93 return 0;
94}
95EXPORT_SYMBOL_GPL(asoc_simple_parse_daifmt);
96
97int asoc_simple_set_dailink_name(struct device *dev,
98 struct snd_soc_dai_link *dai_link,
99 const char *fmt, ...)
100{
101 va_list ap;
102 char *name = NULL;
103 int ret = -ENOMEM;
104
105 va_start(ap, fmt);
106 name = devm_kvasprintf(dev, GFP_KERNEL, fmt, ap);
107 va_end(ap);
108
109 if (name) {
110 ret = 0;
111
112 dai_link->name = name;
113 dai_link->stream_name = name;
114 }
115
116 return ret;
117}
118EXPORT_SYMBOL_GPL(asoc_simple_set_dailink_name);
119
120int asoc_simple_parse_card_name(struct snd_soc_card *card,
121 char *prefix)
122{
123 int ret;
124
125 if (!prefix)
126 prefix = "";
127
128 /* Parse the card name from DT */
129 ret = snd_soc_of_parse_card_name(card, "label");
130 if (ret < 0 || !card->name) {
131 char prop[128];
132
133 snprintf(prop, sizeof(prop), "%sname", prefix);
134 ret = snd_soc_of_parse_card_name(card, prop);
135 if (ret < 0)
136 return ret;
137 }
138
139 if (!card->name && card->dai_link)
140 card->name = card->dai_link->name;
141
142 return 0;
143}
144EXPORT_SYMBOL_GPL(asoc_simple_parse_card_name);
145
146static int asoc_simple_clk_enable(struct asoc_simple_dai *dai)
147{
148 if (dai)
149 return clk_prepare_enable(dai->clk);
150
151 return 0;
152}
153
154static void asoc_simple_clk_disable(struct asoc_simple_dai *dai)
155{
156 if (dai)
157 clk_disable_unprepare(dai->clk);
158}
159
160int asoc_simple_parse_clk(struct device *dev,
161 struct device_node *node,
162 struct asoc_simple_dai *simple_dai,
163 struct snd_soc_dai_link_component *dlc)
164{
165 struct clk *clk;
166 u32 val;
167
168 /*
169 * Parse dai->sysclk come from "clocks = <&xxx>"
170 * (if system has common clock)
171 * or "system-clock-frequency = <xxx>"
172 * or device's module clock.
173 */
174 clk = devm_get_clk_from_child(dev, node, NULL);
175 if (!IS_ERR(clk)) {
176 simple_dai->sysclk = clk_get_rate(clk);
177
178 simple_dai->clk = clk;
179 } else if (!of_property_read_u32(node, "system-clock-frequency", &val)) {
180 simple_dai->sysclk = val;
181 } else {
182 clk = devm_get_clk_from_child(dev, dlc->of_node, NULL);
183 if (!IS_ERR(clk))
184 simple_dai->sysclk = clk_get_rate(clk);
185 }
186
187 if (of_property_read_bool(node, "system-clock-direction-out"))
188 simple_dai->clk_direction = SND_SOC_CLOCK_OUT;
189
190 return 0;
191}
192EXPORT_SYMBOL_GPL(asoc_simple_parse_clk);
193
194int asoc_simple_startup(struct snd_pcm_substream *substream)
195{
196 struct snd_soc_pcm_runtime *rtd = substream->private_data;
197 struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
198 struct simple_dai_props *dai_props = simple_priv_to_props(priv, rtd->num);
199 int ret;
200
201 ret = asoc_simple_clk_enable(dai_props->cpu_dai);
202 if (ret)
203 return ret;
204
205 ret = asoc_simple_clk_enable(dai_props->codec_dai);
206 if (ret)
207 asoc_simple_clk_disable(dai_props->cpu_dai);
208
209 return ret;
210}
211EXPORT_SYMBOL_GPL(asoc_simple_startup);
212
213void asoc_simple_shutdown(struct snd_pcm_substream *substream)
214{
215 struct snd_soc_pcm_runtime *rtd = substream->private_data;
216 struct snd_soc_dai *codec_dai = rtd->codec_dai;
217 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
218 struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
219 struct simple_dai_props *dai_props =
220 simple_priv_to_props(priv, rtd->num);
221
222 if (dai_props->mclk_fs) {
223 snd_soc_dai_set_sysclk(codec_dai, 0, 0, SND_SOC_CLOCK_IN);
224 snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_OUT);
225 }
226
227 asoc_simple_clk_disable(dai_props->cpu_dai);
228
229 asoc_simple_clk_disable(dai_props->codec_dai);
230}
231EXPORT_SYMBOL_GPL(asoc_simple_shutdown);
232
233static int asoc_simple_set_clk_rate(struct asoc_simple_dai *simple_dai,
234 unsigned long rate)
235{
236 if (!simple_dai)
237 return 0;
238
239 if (!simple_dai->clk)
240 return 0;
241
242 if (clk_get_rate(simple_dai->clk) == rate)
243 return 0;
244
245 return clk_set_rate(simple_dai->clk, rate);
246}
247
248int asoc_simple_hw_params(struct snd_pcm_substream *substream,
249 struct snd_pcm_hw_params *params)
250{
251 struct snd_soc_pcm_runtime *rtd = substream->private_data;
252 struct snd_soc_dai *codec_dai = rtd->codec_dai;
253 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
254 struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
255 struct simple_dai_props *dai_props =
256 simple_priv_to_props(priv, rtd->num);
257 unsigned int mclk, mclk_fs = 0;
258 int ret = 0;
259
260 if (dai_props->mclk_fs)
261 mclk_fs = dai_props->mclk_fs;
262
263 if (mclk_fs) {
264 mclk = params_rate(params) * mclk_fs;
265
266 ret = asoc_simple_set_clk_rate(dai_props->codec_dai, mclk);
267 if (ret < 0)
268 return ret;
269
270 ret = asoc_simple_set_clk_rate(dai_props->cpu_dai, mclk);
271 if (ret < 0)
272 return ret;
273
274 ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
275 SND_SOC_CLOCK_IN);
276 if (ret && ret != -ENOTSUPP)
277 goto err;
278
279 ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
280 SND_SOC_CLOCK_OUT);
281 if (ret && ret != -ENOTSUPP)
282 goto err;
283 }
284 return 0;
285err:
286 return ret;
287}
288EXPORT_SYMBOL_GPL(asoc_simple_hw_params);
289
290int asoc_simple_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
291 struct snd_pcm_hw_params *params)
292{
293 struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
294 struct simple_dai_props *dai_props = simple_priv_to_props(priv, rtd->num);
295
296 asoc_simple_convert_fixup(&dai_props->adata, params);
297
298 return 0;
299}
300EXPORT_SYMBOL_GPL(asoc_simple_be_hw_params_fixup);
301
302static int asoc_simple_init_dai(struct snd_soc_dai *dai,
303 struct asoc_simple_dai *simple_dai)
304{
305 int ret;
306
307 if (!simple_dai)
308 return 0;
309
310 if (simple_dai->sysclk) {
311 ret = snd_soc_dai_set_sysclk(dai, 0, simple_dai->sysclk,
312 simple_dai->clk_direction);
313 if (ret && ret != -ENOTSUPP) {
314 dev_err(dai->dev, "simple-card: set_sysclk error\n");
315 return ret;
316 }
317 }
318
319 if (simple_dai->slots) {
320 ret = snd_soc_dai_set_tdm_slot(dai,
321 simple_dai->tx_slot_mask,
322 simple_dai->rx_slot_mask,
323 simple_dai->slots,
324 simple_dai->slot_width);
325 if (ret && ret != -ENOTSUPP) {
326 dev_err(dai->dev, "simple-card: set_tdm_slot error\n");
327 return ret;
328 }
329 }
330
331 return 0;
332}
333
334int asoc_simple_dai_init(struct snd_soc_pcm_runtime *rtd)
335{
336 struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(rtd->card);
337 struct simple_dai_props *dai_props = simple_priv_to_props(priv, rtd->num);
338 int ret;
339
340 ret = asoc_simple_init_dai(rtd->codec_dai,
341 dai_props->codec_dai);
342 if (ret < 0)
343 return ret;
344
345 ret = asoc_simple_init_dai(rtd->cpu_dai,
346 dai_props->cpu_dai);
347 if (ret < 0)
348 return ret;
349
350 return 0;
351}
352EXPORT_SYMBOL_GPL(asoc_simple_dai_init);
353
354void asoc_simple_canonicalize_platform(struct snd_soc_dai_link *dai_link)
355{
356 /* Assumes platform == cpu */
357 if (!dai_link->platforms->of_node)
358 dai_link->platforms->of_node = dai_link->cpus->of_node;
359
360 /*
361 * DPCM BE can be no platform.
362 * Alloced memory will be waste, but not leak.
363 */
364 if (!dai_link->platforms->of_node)
365 dai_link->num_platforms = 0;
366}
367EXPORT_SYMBOL_GPL(asoc_simple_canonicalize_platform);
368
369void asoc_simple_canonicalize_cpu(struct snd_soc_dai_link *dai_link,
370 int is_single_links)
371{
372 /*
373 * In soc_bind_dai_link() will check cpu name after
374 * of_node matching if dai_link has cpu_dai_name.
375 * but, it will never match if name was created by
376 * fmt_single_name() remove cpu_dai_name if cpu_args
377 * was 0. See:
378 * fmt_single_name()
379 * fmt_multiple_name()
380 */
381 if (is_single_links)
382 dai_link->cpus->dai_name = NULL;
383}
384EXPORT_SYMBOL_GPL(asoc_simple_canonicalize_cpu);
385
386int asoc_simple_clean_reference(struct snd_soc_card *card)
387{
388 struct snd_soc_dai_link *dai_link;
389 int i;
390
391 for_each_card_prelinks(card, i, dai_link) {
392 of_node_put(dai_link->cpus->of_node);
393 of_node_put(dai_link->codecs->of_node);
394 }
395 return 0;
396}
397EXPORT_SYMBOL_GPL(asoc_simple_clean_reference);
398
399int asoc_simple_parse_routing(struct snd_soc_card *card,
400 char *prefix)
401{
402 struct device_node *node = card->dev->of_node;
403 char prop[128];
404
405 if (!prefix)
406 prefix = "";
407
408 snprintf(prop, sizeof(prop), "%s%s", prefix, "routing");
409
410 if (!of_property_read_bool(node, prop))
411 return 0;
412
413 return snd_soc_of_parse_audio_routing(card, prop);
414}
415EXPORT_SYMBOL_GPL(asoc_simple_parse_routing);
416
417int asoc_simple_parse_widgets(struct snd_soc_card *card,
418 char *prefix)
419{
420 struct device_node *node = card->dev->of_node;
421 char prop[128];
422
423 if (!prefix)
424 prefix = "";
425
426 snprintf(prop, sizeof(prop), "%s%s", prefix, "widgets");
427
428 if (of_property_read_bool(node, prop))
429 return snd_soc_of_parse_audio_simple_widgets(card, prop);
430
431 /* no widgets is not error */
432 return 0;
433}
434EXPORT_SYMBOL_GPL(asoc_simple_parse_widgets);
435
436int asoc_simple_parse_pin_switches(struct snd_soc_card *card,
437 char *prefix)
438{
439 const unsigned int nb_controls_max = 16;
440 const char **strings, *control_name;
441 struct snd_kcontrol_new *controls;
442 struct device *dev = card->dev;
443 unsigned int i, nb_controls;
444 char prop[128];
445 int ret;
446
447 if (!prefix)
448 prefix = "";
449
450 snprintf(prop, sizeof(prop), "%s%s", prefix, "pin-switches");
451
452 if (!of_property_read_bool(dev->of_node, prop))
453 return 0;
454
455 strings = devm_kcalloc(dev, nb_controls_max,
456 sizeof(*strings), GFP_KERNEL);
457 if (!strings)
458 return -ENOMEM;
459
460 ret = of_property_read_string_array(dev->of_node, prop,
461 strings, nb_controls_max);
462 if (ret < 0)
463 return ret;
464
465 nb_controls = (unsigned int)ret;
466
467 controls = devm_kcalloc(dev, nb_controls,
468 sizeof(*controls), GFP_KERNEL);
469 if (!controls)
470 return -ENOMEM;
471
472 for (i = 0; i < nb_controls; i++) {
473 control_name = devm_kasprintf(dev, GFP_KERNEL,
474 "%s Switch", strings[i]);
475 if (!control_name)
476 return -ENOMEM;
477
478 controls[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
479 controls[i].name = control_name;
480 controls[i].info = snd_soc_dapm_info_pin_switch;
481 controls[i].get = snd_soc_dapm_get_pin_switch;
482 controls[i].put = snd_soc_dapm_put_pin_switch;
483 controls[i].private_value = (unsigned long)strings[i];
484 }
485
486 card->controls = controls;
487 card->num_controls = nb_controls;
488
489 return 0;
490}
491EXPORT_SYMBOL_GPL(asoc_simple_parse_pin_switches);
492
493int asoc_simple_init_jack(struct snd_soc_card *card,
494 struct asoc_simple_jack *sjack,
495 int is_hp, char *prefix)
496{
497 struct device *dev = card->dev;
498 enum of_gpio_flags flags;
499 char prop[128];
500 char *pin_name;
501 char *gpio_name;
502 int mask;
503 int det;
504
505 if (!prefix)
506 prefix = "";
507
508 sjack->gpio.gpio = -ENOENT;
509
510 if (is_hp) {
511 snprintf(prop, sizeof(prop), "%shp-det-gpio", prefix);
512 pin_name = "Headphones";
513 gpio_name = "Headphone detection";
514 mask = SND_JACK_HEADPHONE;
515 } else {
516 snprintf(prop, sizeof(prop), "%smic-det-gpio", prefix);
517 pin_name = "Mic Jack";
518 gpio_name = "Mic detection";
519 mask = SND_JACK_MICROPHONE;
520 }
521
522 det = of_get_named_gpio_flags(dev->of_node, prop, 0, &flags);
523 if (det == -EPROBE_DEFER)
524 return -EPROBE_DEFER;
525
526 if (gpio_is_valid(det)) {
527 sjack->pin.pin = pin_name;
528 sjack->pin.mask = mask;
529
530 sjack->gpio.name = gpio_name;
531 sjack->gpio.report = mask;
532 sjack->gpio.gpio = det;
533 sjack->gpio.invert = !!(flags & OF_GPIO_ACTIVE_LOW);
534 sjack->gpio.debounce_time = 150;
535
536 snd_soc_card_jack_new(card, pin_name, mask,
537 &sjack->jack,
538 &sjack->pin, 1);
539
540 snd_soc_jack_add_gpios(&sjack->jack, 1,
541 &sjack->gpio);
542 }
543
544 return 0;
545}
546EXPORT_SYMBOL_GPL(asoc_simple_init_jack);
547
548int asoc_simple_init_priv(struct asoc_simple_priv *priv,
549 struct link_info *li)
550{
551 struct snd_soc_card *card = simple_priv_to_card(priv);
552 struct device *dev = simple_priv_to_dev(priv);
553 struct snd_soc_dai_link *dai_link;
554 struct simple_dai_props *dai_props;
555 struct asoc_simple_dai *dais;
556 struct snd_soc_codec_conf *cconf = NULL;
557 int i;
558
559 dai_props = devm_kcalloc(dev, li->link, sizeof(*dai_props), GFP_KERNEL);
560 dai_link = devm_kcalloc(dev, li->link, sizeof(*dai_link), GFP_KERNEL);
561 dais = devm_kcalloc(dev, li->dais, sizeof(*dais), GFP_KERNEL);
562 if (!dai_props || !dai_link || !dais)
563 return -ENOMEM;
564
565 if (li->conf) {
566 cconf = devm_kcalloc(dev, li->conf, sizeof(*cconf), GFP_KERNEL);
567 if (!cconf)
568 return -ENOMEM;
569 }
570
571 /*
572 * Use snd_soc_dai_link_component instead of legacy style
573 * It is codec only. but cpu/platform will be supported in the future.
574 * see
575 * soc-core.c :: snd_soc_init_multicodec()
576 *
577 * "platform" might be removed
578 * see
579 * simple-card-utils.c :: asoc_simple_canonicalize_platform()
580 */
581 for (i = 0; i < li->link; i++) {
582 dai_link[i].cpus = &dai_props[i].cpus;
583 dai_link[i].num_cpus = 1;
584 dai_link[i].codecs = &dai_props[i].codecs;
585 dai_link[i].num_codecs = 1;
586 dai_link[i].platforms = &dai_props[i].platforms;
587 dai_link[i].num_platforms = 1;
588 }
589
590 priv->dai_props = dai_props;
591 priv->dai_link = dai_link;
592 priv->dais = dais;
593 priv->codec_conf = cconf;
594
595 card->dai_link = priv->dai_link;
596 card->num_links = li->link;
597 card->codec_conf = cconf;
598 card->num_configs = li->conf;
599
600 return 0;
601}
602EXPORT_SYMBOL_GPL(asoc_simple_init_priv);
603
604/* Module information */
605MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
606MODULE_DESCRIPTION("ALSA SoC Simple Card Utils");
607MODULE_LICENSE("GPL v2");