1 // SPDX-License-Identifier: GPL-2.0
3 // ASoC simple sound card support
5 // Copyright (C) 2012 Renesas Solutions Corp.
6 // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
9 #include <linux/device.h>
10 #include <linux/module.h>
12 #include <linux/platform_device.h>
13 #include <linux/string.h>
14 #include <sound/simple_card.h>
15 #include <sound/soc-dai.h>
16 #include <sound/soc.h>
18 struct simple_card_data {
19 struct snd_soc_card snd_card;
20 struct simple_dai_props {
21 struct asoc_simple_dai cpu_dai;
22 struct asoc_simple_dai codec_dai;
23 struct snd_soc_dai_link_component codecs; /* single codec */
27 struct asoc_simple_jack hp_jack;
28 struct asoc_simple_jack mic_jack;
29 struct snd_soc_dai_link *dai_link;
32 #define simple_priv_to_card(priv) (&(priv)->snd_card)
33 #define simple_priv_to_props(priv, i) ((priv)->dai_props + (i))
34 #define simple_priv_to_dev(priv) (simple_priv_to_card(priv)->dev)
35 #define simple_priv_to_link(priv, i) (simple_priv_to_card(priv)->dai_link + (i))
37 #define DAI "sound-dai"
38 #define CELL "#sound-dai-cells"
39 #define PREFIX "simple-audio-card,"
41 static int asoc_simple_card_startup(struct snd_pcm_substream *substream)
43 struct snd_soc_pcm_runtime *rtd = substream->private_data;
44 struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
45 struct simple_dai_props *dai_props =
46 simple_priv_to_props(priv, rtd->num);
49 ret = asoc_simple_card_clk_enable(&dai_props->cpu_dai);
53 ret = asoc_simple_card_clk_enable(&dai_props->codec_dai);
55 asoc_simple_card_clk_disable(&dai_props->cpu_dai);
60 static void asoc_simple_card_shutdown(struct snd_pcm_substream *substream)
62 struct snd_soc_pcm_runtime *rtd = substream->private_data;
63 struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
64 struct simple_dai_props *dai_props =
65 simple_priv_to_props(priv, rtd->num);
67 asoc_simple_card_clk_disable(&dai_props->cpu_dai);
69 asoc_simple_card_clk_disable(&dai_props->codec_dai);
72 static int asoc_simple_set_clk_rate(struct asoc_simple_dai *simple_dai,
78 if (clk_get_rate(simple_dai->clk) == rate)
81 return clk_set_rate(simple_dai->clk, rate);
84 static int asoc_simple_card_hw_params(struct snd_pcm_substream *substream,
85 struct snd_pcm_hw_params *params)
87 struct snd_soc_pcm_runtime *rtd = substream->private_data;
88 struct snd_soc_dai *codec_dai = rtd->codec_dai;
89 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
90 struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
91 struct simple_dai_props *dai_props =
92 simple_priv_to_props(priv, rtd->num);
93 unsigned int mclk, mclk_fs = 0;
97 mclk_fs = priv->mclk_fs;
98 else if (dai_props->mclk_fs)
99 mclk_fs = dai_props->mclk_fs;
102 mclk = params_rate(params) * mclk_fs;
104 ret = asoc_simple_set_clk_rate(&dai_props->codec_dai, mclk);
108 ret = asoc_simple_set_clk_rate(&dai_props->cpu_dai, mclk);
112 ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
114 if (ret && ret != -ENOTSUPP)
117 ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
119 if (ret && ret != -ENOTSUPP)
127 static const struct snd_soc_ops asoc_simple_card_ops = {
128 .startup = asoc_simple_card_startup,
129 .shutdown = asoc_simple_card_shutdown,
130 .hw_params = asoc_simple_card_hw_params,
133 static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
135 struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
136 struct snd_soc_dai *codec = rtd->codec_dai;
137 struct snd_soc_dai *cpu = rtd->cpu_dai;
138 struct simple_dai_props *dai_props =
139 simple_priv_to_props(priv, rtd->num);
142 ret = asoc_simple_card_init_dai(codec, &dai_props->codec_dai);
146 ret = asoc_simple_card_init_dai(cpu, &dai_props->cpu_dai);
153 static int asoc_simple_card_dai_link_of(struct device_node *node,
154 struct simple_card_data *priv,
156 bool is_top_level_node)
158 struct device *dev = simple_priv_to_dev(priv);
159 struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
160 struct simple_dai_props *dai_props = simple_priv_to_props(priv, idx);
161 struct asoc_simple_dai *cpu_dai = &dai_props->cpu_dai;
162 struct asoc_simple_dai *codec_dai = &dai_props->codec_dai;
163 struct device_node *cpu = NULL;
164 struct device_node *plat = NULL;
165 struct device_node *codec = NULL;
170 /* For single DAI link & old style of DT node */
171 if (is_top_level_node)
174 snprintf(prop, sizeof(prop), "%scpu", prefix);
175 cpu = of_get_child_by_name(node, prop);
179 dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
180 goto dai_link_of_err;
183 snprintf(prop, sizeof(prop), "%splat", prefix);
184 plat = of_get_child_by_name(node, prop);
186 snprintf(prop, sizeof(prop), "%scodec", prefix);
187 codec = of_get_child_by_name(node, prop);
191 dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
192 goto dai_link_of_err;
195 ret = asoc_simple_card_parse_daifmt(dev, node, codec,
196 prefix, &dai_link->dai_fmt);
198 goto dai_link_of_err;
200 of_property_read_u32(node, "mclk-fs", &dai_props->mclk_fs);
202 ret = asoc_simple_card_parse_cpu(cpu, dai_link,
203 DAI, CELL, &single_cpu);
205 goto dai_link_of_err;
207 ret = asoc_simple_card_parse_codec(codec, dai_link, DAI, CELL);
209 goto dai_link_of_err;
211 ret = asoc_simple_card_parse_platform(plat, dai_link, DAI, CELL);
213 goto dai_link_of_err;
215 ret = asoc_simple_card_of_parse_tdm(cpu, cpu_dai);
217 goto dai_link_of_err;
219 ret = asoc_simple_card_of_parse_tdm(codec, codec_dai);
221 goto dai_link_of_err;
223 ret = asoc_simple_card_parse_clk_cpu(dev, cpu, dai_link, cpu_dai);
225 goto dai_link_of_err;
227 ret = asoc_simple_card_parse_clk_codec(dev, codec, dai_link, codec_dai);
229 goto dai_link_of_err;
231 ret = asoc_simple_card_canonicalize_dailink(dai_link);
233 goto dai_link_of_err;
235 ret = asoc_simple_card_set_dailink_name(dev, dai_link,
237 dai_link->cpu_dai_name,
238 dai_link->codecs->dai_name);
240 goto dai_link_of_err;
242 dai_link->ops = &asoc_simple_card_ops;
243 dai_link->init = asoc_simple_card_dai_init;
245 asoc_simple_card_canonicalize_cpu(dai_link, single_cpu);
254 static int asoc_simple_card_parse_aux_devs(struct device_node *node,
255 struct simple_card_data *priv)
257 struct device *dev = simple_priv_to_dev(priv);
258 struct device_node *aux_node;
259 struct snd_soc_card *card = simple_priv_to_card(priv);
262 if (!of_find_property(node, PREFIX "aux-devs", &len))
263 return 0; /* Ok to have no aux-devs */
265 n = len / sizeof(__be32);
269 card->aux_dev = devm_kcalloc(dev,
270 n, sizeof(*card->aux_dev), GFP_KERNEL);
274 for (i = 0; i < n; i++) {
275 aux_node = of_parse_phandle(node, PREFIX "aux-devs", i);
278 card->aux_dev[i].codec_of_node = aux_node;
281 card->num_aux_devs = n;
285 static int asoc_simple_card_parse_of(struct simple_card_data *priv)
287 struct device *dev = simple_priv_to_dev(priv);
288 struct snd_soc_card *card = simple_priv_to_card(priv);
289 struct device_node *dai_link;
290 struct device_node *node = dev->of_node;
296 dai_link = of_get_child_by_name(node, PREFIX "dai-link");
298 ret = asoc_simple_card_of_parse_widgets(card, PREFIX);
302 ret = asoc_simple_card_of_parse_routing(card, PREFIX, 1);
306 /* Factor to mclk, used in hw_params() */
307 of_property_read_u32(node, PREFIX "mclk-fs", &priv->mclk_fs);
309 /* Single/Muti DAI link(s) & New style of DT node */
311 struct device_node *np = NULL;
314 for_each_child_of_node(node, np) {
315 dev_dbg(dev, "\tlink %d:\n", i);
316 ret = asoc_simple_card_dai_link_of(np, priv,
325 /* For single DAI link & old style of DT node */
326 ret = asoc_simple_card_dai_link_of(node, priv, 0, true);
331 ret = asoc_simple_card_parse_card_name(card, PREFIX);
335 ret = asoc_simple_card_parse_aux_devs(node, priv);
338 of_node_put(dai_link);
343 static int asoc_simple_soc_card_probe(struct snd_soc_card *card)
345 struct simple_card_data *priv = snd_soc_card_get_drvdata(card);
348 ret = asoc_simple_card_init_hp(card, &priv->hp_jack, PREFIX);
352 ret = asoc_simple_card_init_mic(card, &priv->mic_jack, PREFIX);
359 static int asoc_simple_card_probe(struct platform_device *pdev)
361 struct simple_card_data *priv;
362 struct snd_soc_dai_link *dai_link;
363 struct simple_dai_props *dai_props;
364 struct device *dev = &pdev->dev;
365 struct device_node *np = dev->of_node;
366 struct snd_soc_card *card;
369 /* Get the number of DAI links */
370 if (np && of_get_child_by_name(np, PREFIX "dai-link"))
371 num = of_get_child_count(np);
375 /* Allocate the private data and the DAI link array */
376 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
380 dai_props = devm_kcalloc(dev, num, sizeof(*dai_props), GFP_KERNEL);
381 dai_link = devm_kcalloc(dev, num, sizeof(*dai_link), GFP_KERNEL);
382 if (!dai_props || !dai_link)
386 * Use snd_soc_dai_link_component instead of legacy style
387 * It is codec only. but cpu/platform will be supported in the future.
389 * soc-core.c :: snd_soc_init_multicodec()
391 for (i = 0; i < num; i++) {
392 dai_link[i].codecs = &dai_props[i].codecs;
393 dai_link[i].num_codecs = 1;
396 priv->dai_props = dai_props;
397 priv->dai_link = dai_link;
399 /* Init snd_soc_card */
400 card = simple_priv_to_card(priv);
401 card->owner = THIS_MODULE;
403 card->dai_link = priv->dai_link;
404 card->num_links = num;
405 card->probe = asoc_simple_soc_card_probe;
407 if (np && of_device_is_available(np)) {
409 ret = asoc_simple_card_parse_of(priv);
411 if (ret != -EPROBE_DEFER)
412 dev_err(dev, "parse error %d\n", ret);
417 struct asoc_simple_card_info *cinfo;
418 struct snd_soc_dai_link_component *codecs;
420 cinfo = dev->platform_data;
422 dev_err(dev, "no info for asoc-simple-card\n");
427 !cinfo->codec_dai.name ||
430 !cinfo->cpu_dai.name) {
431 dev_err(dev, "insufficient asoc_simple_card_info settings\n");
435 codecs = dai_link->codecs;
436 codecs->name = cinfo->codec;
437 codecs->dai_name = cinfo->codec_dai.name;
439 card->name = (cinfo->card) ? cinfo->card : cinfo->name;
440 dai_link->name = cinfo->name;
441 dai_link->stream_name = cinfo->name;
442 dai_link->platform_name = cinfo->platform;
443 dai_link->cpu_dai_name = cinfo->cpu_dai.name;
444 dai_link->dai_fmt = cinfo->daifmt;
445 dai_link->init = asoc_simple_card_dai_init;
446 memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
447 sizeof(priv->dai_props->cpu_dai));
448 memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
449 sizeof(priv->dai_props->codec_dai));
452 snd_soc_card_set_drvdata(card, priv);
454 ret = devm_snd_soc_register_card(dev, card);
460 asoc_simple_card_clean_reference(card);
465 static int asoc_simple_card_remove(struct platform_device *pdev)
467 struct snd_soc_card *card = platform_get_drvdata(pdev);
469 return asoc_simple_card_clean_reference(card);
472 static const struct of_device_id asoc_simple_of_match[] = {
473 { .compatible = "simple-audio-card", },
476 MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
478 static struct platform_driver asoc_simple_card = {
480 .name = "asoc-simple-card",
481 .pm = &snd_soc_pm_ops,
482 .of_match_table = asoc_simple_of_match,
484 .probe = asoc_simple_card_probe,
485 .remove = asoc_simple_card_remove,
488 module_platform_driver(asoc_simple_card);
490 MODULE_ALIAS("platform:asoc-simple-card");
491 MODULE_LICENSE("GPL v2");
492 MODULE_DESCRIPTION("ASoC Simple Sound Card");
493 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");