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;
27 struct snd_soc_dai_link dai_link[]; /* dynamically allocated */
30 static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai,
31 struct asoc_simple_dai *set)
36 ret = snd_soc_dai_set_fmt(dai, set->fmt);
37 if (ret && ret != -ENOTSUPP) {
38 dev_err(dai->dev, "simple-card: set_fmt error\n");
44 ret = snd_soc_dai_set_sysclk(dai, 0, set->sysclk, 0);
45 if (ret && ret != -ENOTSUPP) {
46 dev_err(dai->dev, "simple-card: set_sysclk error\n");
52 ret = snd_soc_dai_set_tdm_slot(dai, 0, 0,
55 if (ret && ret != -ENOTSUPP) {
56 dev_err(dai->dev, "simple-card: set_tdm_slot error\n");
67 static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
69 struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
70 struct snd_soc_dai *codec = rtd->codec_dai;
71 struct snd_soc_dai *cpu = rtd->cpu_dai;
72 struct simple_dai_props *dai_props;
75 num = rtd - rtd->card->rtd;
76 dai_props = &priv->dai_props[num];
77 ret = __asoc_simple_card_dai_init(codec, &dai_props->codec_dai);
81 ret = __asoc_simple_card_dai_init(cpu, &dai_props->cpu_dai);
89 asoc_simple_card_sub_parse_of(struct device_node *np,
90 struct asoc_simple_dai *dai,
91 const struct device_node **p_node,
94 struct device_node *node;
99 * get node via "sound-dai = <&phandle port>"
100 * it will be used as xxx_of_node on soc_bind_dai_link()
102 node = of_parse_phandle(np, "sound-dai", 0);
108 ret = snd_soc_of_get_dai_name(np, name);
113 ret = snd_soc_of_parse_tdm_slot(np, &dai->slots, &dai->slot_width);
118 * dai->sysclk come from
119 * "clocks = <&xxx>" (if system has common clock)
120 * or "system-clock-frequency = <xxx>"
121 * or device's module clock.
123 if (of_property_read_bool(np, "clocks")) {
124 clk = of_clk_get(np, 0);
130 dai->sysclk = clk_get_rate(clk);
131 } else if (of_property_read_bool(np, "system-clock-frequency")) {
132 of_property_read_u32(np,
133 "system-clock-frequency",
136 clk = of_clk_get(node, 0);
138 dai->sysclk = clk_get_rate(clk);
144 static int simple_card_dai_link_of(struct device_node *node,
146 struct snd_soc_dai_link *dai_link,
147 struct simple_dai_props *dai_props)
149 struct device_node *np = NULL;
150 struct device_node *bitclkmaster = NULL;
151 struct device_node *framemaster = NULL;
158 prefix = "simple-audio-card,";
160 daifmt = snd_soc_of_parse_daifmt(node, prefix,
161 &bitclkmaster, &framemaster);
162 daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
164 snprintf(prop, sizeof(prop), "%scpu", prefix);
165 np = of_get_child_by_name(node, prop);
168 dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
169 goto dai_link_of_err;
172 ret = asoc_simple_card_sub_parse_of(np, &dai_props->cpu_dai,
173 &dai_link->cpu_of_node,
174 &dai_link->cpu_dai_name);
176 goto dai_link_of_err;
178 dai_props->cpu_dai.fmt = daifmt;
179 switch (((np == bitclkmaster) << 4) | (np == framemaster)) {
181 dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBS_CFS;
184 dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBS_CFM;
187 dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBM_CFS;
190 dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBM_CFM;
195 snprintf(prop, sizeof(prop), "%scodec", prefix);
196 np = of_get_child_by_name(node, prop);
199 dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
200 goto dai_link_of_err;
203 ret = asoc_simple_card_sub_parse_of(np, &dai_props->codec_dai,
204 &dai_link->codec_of_node,
205 &dai_link->codec_dai_name);
207 goto dai_link_of_err;
209 if (strlen(prefix) && !bitclkmaster && !framemaster) {
210 /* No dai-link level and master setting was not found from
211 sound node level, revert back to legacy DT parsing and
212 take the settings from codec node. */
213 dev_dbg(dev, "%s: Revert to legacy daifmt parsing\n",
215 dai_props->cpu_dai.fmt = dai_props->codec_dai.fmt =
216 snd_soc_of_parse_daifmt(np, NULL, NULL, NULL) |
217 (daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK);
219 dai_props->codec_dai.fmt = daifmt;
220 switch (((np == bitclkmaster) << 4) | (np == framemaster)) {
222 dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBM_CFM;
225 dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBM_CFS;
228 dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBS_CFM;
231 dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBS_CFS;
236 if (!dai_link->cpu_dai_name || !dai_link->codec_dai_name) {
238 goto dai_link_of_err;
241 /* simple-card assumes platform == cpu */
242 dai_link->platform_of_node = dai_link->cpu_of_node;
244 /* Link name is created from CPU/CODEC dai name */
245 name = devm_kzalloc(dev,
246 strlen(dai_link->cpu_dai_name) +
247 strlen(dai_link->codec_dai_name) + 2,
249 sprintf(name, "%s-%s", dai_link->cpu_dai_name,
250 dai_link->codec_dai_name);
251 dai_link->name = dai_link->stream_name = name;
253 dev_dbg(dev, "\tname : %s\n", dai_link->stream_name);
254 dev_dbg(dev, "\tcpu : %s / %04x / %d\n",
255 dai_link->cpu_dai_name,
256 dai_props->cpu_dai.fmt,
257 dai_props->cpu_dai.sysclk);
258 dev_dbg(dev, "\tcodec : %s / %04x / %d\n",
259 dai_link->codec_dai_name,
260 dai_props->codec_dai.fmt,
261 dai_props->codec_dai.sysclk);
267 of_node_put(bitclkmaster);
269 of_node_put(framemaster);
273 static int asoc_simple_card_parse_of(struct device_node *node,
274 struct simple_card_data *priv,
278 struct snd_soc_dai_link *dai_link = priv->snd_card.dai_link;
279 struct simple_dai_props *dai_props = priv->dai_props;
282 /* parsing the card name from DT */
283 snd_soc_of_parse_card_name(&priv->snd_card, "simple-audio-card,name");
285 /* off-codec widgets */
286 if (of_property_read_bool(node, "simple-audio-card,widgets")) {
287 ret = snd_soc_of_parse_audio_simple_widgets(&priv->snd_card,
288 "simple-audio-card,widgets");
294 if (of_property_read_bool(node, "simple-audio-card,routing")) {
295 ret = snd_soc_of_parse_audio_routing(&priv->snd_card,
296 "simple-audio-card,routing");
301 dev_dbg(dev, "New simple-card: %s\n", priv->snd_card.name ?
302 priv->snd_card.name : "");
305 struct device_node *np = NULL;
307 for (i = 0; (np = of_get_next_child(node, np)); i++) {
308 dev_dbg(dev, "\tlink %d:\n", i);
309 ret = simple_card_dai_link_of(np, dev, dai_link + i,
317 ret = simple_card_dai_link_of(node, dev, dai_link, dai_props);
322 if (!priv->snd_card.name)
323 priv->snd_card.name = priv->snd_card.dai_link->name;
328 /* update the reference count of the devices nodes at end of probe */
329 static int asoc_simple_card_unref(struct platform_device *pdev)
331 struct snd_soc_card *card = platform_get_drvdata(pdev);
332 struct snd_soc_dai_link *dai_link;
333 struct device_node *np;
336 for (num_links = 0, dai_link = card->dai_link;
337 num_links < card->num_links;
338 num_links++, dai_link++) {
339 np = (struct device_node *) dai_link->cpu_of_node;
342 np = (struct device_node *) dai_link->codec_of_node;
349 static int asoc_simple_card_probe(struct platform_device *pdev)
351 struct simple_card_data *priv;
352 struct snd_soc_dai_link *dai_link;
353 struct device_node *np = pdev->dev.of_node;
354 struct device *dev = &pdev->dev;
355 int num_links, multi, ret;
357 /* get the number of DAI links */
358 if (np && of_get_child_by_name(np, "simple-audio-card,dai-link")) {
359 num_links = of_get_child_count(np);
366 /* allocate the private data and the DAI link array */
367 priv = devm_kzalloc(dev,
368 sizeof(*priv) + sizeof(*dai_link) * num_links,
376 priv->snd_card.owner = THIS_MODULE;
377 priv->snd_card.dev = dev;
378 dai_link = priv->dai_link;
379 priv->snd_card.dai_link = dai_link;
380 priv->snd_card.num_links = num_links;
382 /* get room for the other properties */
383 priv->dai_props = devm_kzalloc(dev,
384 sizeof(*priv->dai_props) * num_links,
386 if (!priv->dai_props)
389 if (np && of_device_is_available(np)) {
391 ret = asoc_simple_card_parse_of(np, priv, dev, multi);
393 if (ret != -EPROBE_DEFER)
394 dev_err(dev, "parse error %d\n", ret);
399 * soc_bind_dai_link() will check cpu name
400 * after of_node matching if dai_link has cpu_dai_name.
401 * but, it will never match if name was created by fmt_single_name()
402 * remove cpu_dai_name to escape name matching.
405 * fmt_multiple_name()
408 dai_link->cpu_dai_name = NULL;
411 struct asoc_simple_card_info *cinfo;
413 cinfo = dev->platform_data;
415 dev_err(dev, "no info for asoc-simple-card\n");
420 !cinfo->codec_dai.name ||
423 !cinfo->cpu_dai.name) {
424 dev_err(dev, "insufficient asoc_simple_card_info settings\n");
428 priv->snd_card.name = (cinfo->card) ? cinfo->card : cinfo->name;
429 dai_link->name = cinfo->name;
430 dai_link->stream_name = cinfo->name;
431 dai_link->platform_name = cinfo->platform;
432 dai_link->codec_name = cinfo->codec;
433 dai_link->cpu_dai_name = cinfo->cpu_dai.name;
434 dai_link->codec_dai_name = cinfo->codec_dai.name;
435 memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
436 sizeof(priv->dai_props->cpu_dai));
437 memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
438 sizeof(priv->dai_props->codec_dai));
440 priv->dai_props->cpu_dai.fmt |= cinfo->daifmt;
441 priv->dai_props->codec_dai.fmt |= cinfo->daifmt;
445 * init snd_soc_dai_link
447 dai_link->init = asoc_simple_card_dai_init;
449 snd_soc_card_set_drvdata(&priv->snd_card, priv);
451 ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
454 asoc_simple_card_unref(pdev);
458 static const struct of_device_id asoc_simple_of_match[] = {
459 { .compatible = "simple-audio-card", },
462 MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
464 static struct platform_driver asoc_simple_card = {
466 .name = "asoc-simple-card",
467 .owner = THIS_MODULE,
468 .of_match_table = asoc_simple_of_match,
470 .probe = asoc_simple_card_probe,
473 module_platform_driver(asoc_simple_card);
475 MODULE_ALIAS("platform:asoc-simple-card");
476 MODULE_LICENSE("GPL");
477 MODULE_DESCRIPTION("ASoC Simple Sound Card");
478 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");