2 * ASoC simple sound card support
4 * Copyright (C) 2012 Renesas Solutions Corp.
5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 #include <linux/clk.h>
12 #include <linux/device.h>
13 #include <linux/module.h>
15 #include <linux/platform_device.h>
16 #include <linux/string.h>
17 #include <sound/simple_card.h>
18 #include <sound/soc-dai.h>
19 #include <sound/soc.h>
21 struct simple_card_data {
22 struct snd_soc_card snd_card;
23 struct simple_dai_props {
24 struct asoc_simple_dai cpu_dai;
25 struct asoc_simple_dai codec_dai;
28 struct snd_soc_dai_link dai_link[]; /* dynamically allocated */
31 static int asoc_simple_card_hw_params(struct snd_pcm_substream *substream,
32 struct snd_pcm_hw_params *params)
34 struct snd_soc_pcm_runtime *rtd = substream->private_data;
35 struct snd_soc_dai *codec_dai = rtd->codec_dai;
36 struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
41 mclk = params_rate(params) * priv->mclk_fs;
42 ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
49 static struct snd_soc_ops asoc_simple_card_ops = {
50 .hw_params = asoc_simple_card_hw_params,
53 static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai,
54 struct asoc_simple_dai *set)
59 ret = snd_soc_dai_set_fmt(dai, set->fmt);
60 if (ret && ret != -ENOTSUPP) {
61 dev_err(dai->dev, "simple-card: set_fmt error\n");
67 ret = snd_soc_dai_set_sysclk(dai, 0, set->sysclk, 0);
68 if (ret && ret != -ENOTSUPP) {
69 dev_err(dai->dev, "simple-card: set_sysclk error\n");
75 ret = snd_soc_dai_set_tdm_slot(dai, 0, 0,
78 if (ret && ret != -ENOTSUPP) {
79 dev_err(dai->dev, "simple-card: set_tdm_slot error\n");
90 static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
92 struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
93 struct snd_soc_dai *codec = rtd->codec_dai;
94 struct snd_soc_dai *cpu = rtd->cpu_dai;
95 struct simple_dai_props *dai_props;
98 num = rtd - rtd->card->rtd;
99 dai_props = &priv->dai_props[num];
100 ret = __asoc_simple_card_dai_init(codec, &dai_props->codec_dai);
104 ret = __asoc_simple_card_dai_init(cpu, &dai_props->cpu_dai);
112 asoc_simple_card_sub_parse_of(struct device_node *np,
113 struct asoc_simple_dai *dai,
114 const struct device_node **p_node,
117 struct device_node *node;
122 * get node via "sound-dai = <&phandle port>"
123 * it will be used as xxx_of_node on soc_bind_dai_link()
125 node = of_parse_phandle(np, "sound-dai", 0);
131 ret = snd_soc_of_get_dai_name(np, name);
136 ret = snd_soc_of_parse_tdm_slot(np, &dai->slots, &dai->slot_width);
141 * dai->sysclk come from
142 * "clocks = <&xxx>" (if system has common clock)
143 * or "system-clock-frequency = <xxx>"
144 * or device's module clock.
146 if (of_property_read_bool(np, "clocks")) {
147 clk = of_clk_get(np, 0);
153 dai->sysclk = clk_get_rate(clk);
154 } else if (of_property_read_bool(np, "system-clock-frequency")) {
155 of_property_read_u32(np,
156 "system-clock-frequency",
159 clk = of_clk_get(node, 0);
161 dai->sysclk = clk_get_rate(clk);
167 static int simple_card_dai_link_of(struct device_node *node,
169 struct snd_soc_dai_link *dai_link,
170 struct simple_dai_props *dai_props,
171 bool is_top_level_node)
173 struct device_node *np = NULL;
174 struct device_node *bitclkmaster = NULL;
175 struct device_node *framemaster = NULL;
182 if (is_top_level_node)
183 prefix = "simple-audio-card,";
185 daifmt = snd_soc_of_parse_daifmt(node, prefix,
186 &bitclkmaster, &framemaster);
187 daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
189 snprintf(prop, sizeof(prop), "%scpu", prefix);
190 np = of_get_child_by_name(node, prop);
193 dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
194 goto dai_link_of_err;
197 ret = asoc_simple_card_sub_parse_of(np, &dai_props->cpu_dai,
198 &dai_link->cpu_of_node,
199 &dai_link->cpu_dai_name);
201 goto dai_link_of_err;
203 dai_props->cpu_dai.fmt = daifmt;
204 switch (((np == bitclkmaster) << 4) | (np == framemaster)) {
206 dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBS_CFS;
209 dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBS_CFM;
212 dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBM_CFS;
215 dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBM_CFM;
220 snprintf(prop, sizeof(prop), "%scodec", prefix);
221 np = of_get_child_by_name(node, prop);
224 dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
225 goto dai_link_of_err;
228 ret = asoc_simple_card_sub_parse_of(np, &dai_props->codec_dai,
229 &dai_link->codec_of_node,
230 &dai_link->codec_dai_name);
232 goto dai_link_of_err;
234 if (strlen(prefix) && !bitclkmaster && !framemaster) {
235 /* No dai-link level and master setting was not found from
236 sound node level, revert back to legacy DT parsing and
237 take the settings from codec node. */
238 dev_dbg(dev, "%s: Revert to legacy daifmt parsing\n",
240 dai_props->cpu_dai.fmt = dai_props->codec_dai.fmt =
241 snd_soc_of_parse_daifmt(np, NULL, NULL, NULL) |
242 (daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK);
244 dai_props->codec_dai.fmt = daifmt;
245 switch (((np == bitclkmaster) << 4) | (np == framemaster)) {
247 dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBM_CFM;
250 dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBM_CFS;
253 dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBS_CFM;
256 dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBS_CFS;
261 if (!dai_link->cpu_dai_name || !dai_link->codec_dai_name) {
263 goto dai_link_of_err;
266 /* simple-card assumes platform == cpu */
267 dai_link->platform_of_node = dai_link->cpu_of_node;
269 /* Link name is created from CPU/CODEC dai name */
270 name = devm_kzalloc(dev,
271 strlen(dai_link->cpu_dai_name) +
272 strlen(dai_link->codec_dai_name) + 2,
274 sprintf(name, "%s-%s", dai_link->cpu_dai_name,
275 dai_link->codec_dai_name);
276 dai_link->name = dai_link->stream_name = name;
277 dai_link->ops = &asoc_simple_card_ops;
279 dev_dbg(dev, "\tname : %s\n", dai_link->stream_name);
280 dev_dbg(dev, "\tcpu : %s / %04x / %d\n",
281 dai_link->cpu_dai_name,
282 dai_props->cpu_dai.fmt,
283 dai_props->cpu_dai.sysclk);
284 dev_dbg(dev, "\tcodec : %s / %04x / %d\n",
285 dai_link->codec_dai_name,
286 dai_props->codec_dai.fmt,
287 dai_props->codec_dai.sysclk);
293 of_node_put(bitclkmaster);
295 of_node_put(framemaster);
299 static int asoc_simple_card_parse_of(struct device_node *node,
300 struct simple_card_data *priv,
304 struct snd_soc_dai_link *dai_link = priv->snd_card.dai_link;
305 struct simple_dai_props *dai_props = priv->dai_props;
308 /* parsing the card name from DT */
309 snd_soc_of_parse_card_name(&priv->snd_card, "simple-audio-card,name");
311 /* off-codec widgets */
312 if (of_property_read_bool(node, "simple-audio-card,widgets")) {
313 ret = snd_soc_of_parse_audio_simple_widgets(&priv->snd_card,
314 "simple-audio-card,widgets");
320 if (of_property_read_bool(node, "simple-audio-card,routing")) {
321 ret = snd_soc_of_parse_audio_routing(&priv->snd_card,
322 "simple-audio-card,routing");
327 /* Factor to mclk, used in hw_params() */
328 of_property_read_u32(node, "simple-audio-card,mclk-fs",
331 dev_dbg(dev, "New simple-card: %s\n", priv->snd_card.name ?
332 priv->snd_card.name : "");
335 struct device_node *np = NULL;
337 for (i = 0; (np = of_get_next_child(node, np)); i++) {
338 dev_dbg(dev, "\tlink %d:\n", i);
339 ret = simple_card_dai_link_of(np, dev, dai_link + i,
340 dai_props + i, false);
347 ret = simple_card_dai_link_of(node, dev, dai_link, dai_props,
353 if (!priv->snd_card.name)
354 priv->snd_card.name = priv->snd_card.dai_link->name;
359 /* update the reference count of the devices nodes at end of probe */
360 static int asoc_simple_card_unref(struct platform_device *pdev)
362 struct snd_soc_card *card = platform_get_drvdata(pdev);
363 struct snd_soc_dai_link *dai_link;
364 struct device_node *np;
367 for (num_links = 0, dai_link = card->dai_link;
368 num_links < card->num_links;
369 num_links++, dai_link++) {
370 np = (struct device_node *) dai_link->cpu_of_node;
373 np = (struct device_node *) dai_link->codec_of_node;
380 static int asoc_simple_card_probe(struct platform_device *pdev)
382 struct simple_card_data *priv;
383 struct snd_soc_dai_link *dai_link;
384 struct device_node *np = pdev->dev.of_node;
385 struct device *dev = &pdev->dev;
386 int num_links, multi, ret;
388 /* get the number of DAI links */
389 if (np && of_get_child_by_name(np, "simple-audio-card,dai-link")) {
390 num_links = of_get_child_count(np);
397 /* allocate the private data and the DAI link array */
398 priv = devm_kzalloc(dev,
399 sizeof(*priv) + sizeof(*dai_link) * num_links,
407 priv->snd_card.owner = THIS_MODULE;
408 priv->snd_card.dev = dev;
409 dai_link = priv->dai_link;
410 priv->snd_card.dai_link = dai_link;
411 priv->snd_card.num_links = num_links;
413 /* get room for the other properties */
414 priv->dai_props = devm_kzalloc(dev,
415 sizeof(*priv->dai_props) * num_links,
417 if (!priv->dai_props)
420 if (np && of_device_is_available(np)) {
422 ret = asoc_simple_card_parse_of(np, priv, dev, multi);
424 if (ret != -EPROBE_DEFER)
425 dev_err(dev, "parse error %d\n", ret);
430 * soc_bind_dai_link() will check cpu name
431 * after of_node matching if dai_link has cpu_dai_name.
432 * but, it will never match if name was created by fmt_single_name()
433 * remove cpu_dai_name to escape name matching.
436 * fmt_multiple_name()
439 dai_link->cpu_dai_name = NULL;
442 struct asoc_simple_card_info *cinfo;
444 cinfo = dev->platform_data;
446 dev_err(dev, "no info for asoc-simple-card\n");
451 !cinfo->codec_dai.name ||
454 !cinfo->cpu_dai.name) {
455 dev_err(dev, "insufficient asoc_simple_card_info settings\n");
459 priv->snd_card.name = (cinfo->card) ? cinfo->card : cinfo->name;
460 dai_link->name = cinfo->name;
461 dai_link->stream_name = cinfo->name;
462 dai_link->platform_name = cinfo->platform;
463 dai_link->codec_name = cinfo->codec;
464 dai_link->cpu_dai_name = cinfo->cpu_dai.name;
465 dai_link->codec_dai_name = cinfo->codec_dai.name;
466 memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
467 sizeof(priv->dai_props->cpu_dai));
468 memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
469 sizeof(priv->dai_props->codec_dai));
471 priv->dai_props->cpu_dai.fmt |= cinfo->daifmt;
472 priv->dai_props->codec_dai.fmt |= cinfo->daifmt;
476 * init snd_soc_dai_link
478 dai_link->init = asoc_simple_card_dai_init;
480 snd_soc_card_set_drvdata(&priv->snd_card, priv);
482 ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
485 asoc_simple_card_unref(pdev);
489 static const struct of_device_id asoc_simple_of_match[] = {
490 { .compatible = "simple-audio-card", },
493 MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
495 static struct platform_driver asoc_simple_card = {
497 .name = "asoc-simple-card",
498 .owner = THIS_MODULE,
499 .of_match_table = asoc_simple_of_match,
501 .probe = asoc_simple_card_probe,
504 module_platform_driver(asoc_simple_card);
506 MODULE_ALIAS("platform:asoc-simple-card");
507 MODULE_LICENSE("GPL");
508 MODULE_DESCRIPTION("ASoC Simple Sound Card");
509 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");