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 =
70 snd_soc_card_get_drvdata(rtd->card);
71 struct snd_soc_dai *codec = rtd->codec_dai;
72 struct snd_soc_dai *cpu = rtd->cpu_dai;
73 struct simple_dai_props *dai_props;
76 num = rtd - rtd->card->rtd;
77 dai_props = &priv->dai_props[num];
78 ret = __asoc_simple_card_dai_init(codec, &dai_props->codec_dai);
82 ret = __asoc_simple_card_dai_init(cpu, &dai_props->cpu_dai);
90 asoc_simple_card_sub_parse_of(struct device_node *np,
92 struct asoc_simple_dai *dai,
93 const struct device_node **p_node,
96 struct device_node *node;
101 * get node via "sound-dai = <&phandle port>"
102 * it will be used as xxx_of_node on soc_bind_dai_link()
104 node = of_parse_phandle(np, "sound-dai", 0);
110 ret = snd_soc_of_get_dai_name(np, name);
115 ret = snd_soc_of_parse_tdm_slot(np, &dai->slots, &dai->slot_width);
120 * bitclock-inversion, frame-inversion
121 * bitclock-master, frame-master
122 * and specific "format" if it has
124 dai->fmt = snd_soc_of_parse_daifmt(np, NULL);
128 * dai->sysclk come from
129 * "clocks = <&xxx>" (if system has common clock)
130 * or "system-clock-frequency = <xxx>"
131 * or device's module clock.
133 if (of_property_read_bool(np, "clocks")) {
134 clk = of_clk_get(np, 0);
140 dai->sysclk = clk_get_rate(clk);
141 } else if (of_property_read_bool(np, "system-clock-frequency")) {
142 of_property_read_u32(np,
143 "system-clock-frequency",
146 clk = of_clk_get(node, 0);
148 dai->sysclk = clk_get_rate(clk);
154 static int simple_card_cpu_codec_of(struct device_node *node,
156 struct snd_soc_dai_link *dai_link,
157 struct simple_dai_props *dai_props)
159 struct device_node *np;
164 np = of_get_child_by_name(node, "simple-audio-card,cpu");
166 ret = asoc_simple_card_sub_parse_of(np, daifmt,
168 &dai_link->cpu_of_node,
169 &dai_link->cpu_dai_name);
177 np = of_get_child_by_name(node, "simple-audio-card,codec");
179 ret = asoc_simple_card_sub_parse_of(np, daifmt,
180 &dai_props->codec_dai,
181 &dai_link->codec_of_node,
182 &dai_link->codec_dai_name);
188 static int asoc_simple_card_parse_of(struct device_node *node,
189 struct simple_card_data *priv,
193 struct snd_soc_dai_link *dai_link = priv->snd_card.dai_link;
194 struct simple_dai_props *dai_props = priv->dai_props;
195 struct device_node *np;
200 /* parsing the card name from DT */
201 snd_soc_of_parse_card_name(&priv->snd_card, "simple-audio-card,name");
203 /* get CPU/CODEC common format via simple-audio-card,format */
204 daifmt = snd_soc_of_parse_daifmt(node, "simple-audio-card,") &
205 (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK);
207 /* off-codec widgets */
208 if (of_property_read_bool(node, "simple-audio-card,widgets")) {
209 ret = snd_soc_of_parse_audio_simple_widgets(&priv->snd_card,
210 "simple-audio-card,widgets");
216 if (of_property_read_bool(node, "simple-audio-card,routing")) {
217 ret = snd_soc_of_parse_audio_routing(&priv->snd_card,
218 "simple-audio-card,routing");
223 /* loop on the DAI links */
227 np = of_get_next_child(node, np);
232 ret = simple_card_cpu_codec_of(multi ? np : node,
233 daifmt, dai_link, dai_props);
238 * overwrite cpu_dai->fmt as its DAIFMT_MASTER bit is based on CODEC
239 * while the other bits should be identical unless buggy SW/HW design.
241 dai_props->cpu_dai.fmt = dai_props->codec_dai.fmt;
243 if (!dai_link->cpu_dai_name || !dai_link->codec_dai_name) {
248 /* simple-card assumes platform == cpu */
249 dai_link->platform_of_node = dai_link->cpu_of_node;
251 name = devm_kzalloc(dev,
252 strlen(dai_link->cpu_dai_name) +
253 strlen(dai_link->codec_dai_name) + 2,
255 sprintf(name, "%s-%s", dai_link->cpu_dai_name,
256 dai_link->codec_dai_name);
257 dai_link->name = dai_link->stream_name = name;
266 /* card name is created from CPU/CODEC dai name */
267 dai_link = priv->snd_card.dai_link;
268 if (!priv->snd_card.name)
269 priv->snd_card.name = dai_link->name;
271 dev_dbg(dev, "card-name : %s\n", priv->snd_card.name);
272 dev_dbg(dev, "platform : %04x\n", daifmt);
273 dai_props = priv->dai_props;
274 dev_dbg(dev, "cpu : %s / %04x / %d\n",
275 dai_link->cpu_dai_name,
276 dai_props->cpu_dai.fmt,
277 dai_props->cpu_dai.sysclk);
278 dev_dbg(dev, "codec : %s / %04x / %d\n",
279 dai_link->codec_dai_name,
280 dai_props->codec_dai.fmt,
281 dai_props->codec_dai.sysclk);
290 /* update the reference count of the devices nodes at end of probe */
291 static int asoc_simple_card_unref(struct platform_device *pdev)
293 struct snd_soc_card *card = platform_get_drvdata(pdev);
294 struct snd_soc_dai_link *dai_link;
295 struct device_node *np;
298 for (num_links = 0, dai_link = card->dai_link;
299 num_links < card->num_links;
300 num_links++, dai_link++) {
301 np = (struct device_node *) dai_link->cpu_of_node;
304 np = (struct device_node *) dai_link->codec_of_node;
311 static int asoc_simple_card_probe(struct platform_device *pdev)
313 struct simple_card_data *priv;
314 struct snd_soc_dai_link *dai_link;
315 struct device_node *np = pdev->dev.of_node;
316 struct device *dev = &pdev->dev;
317 int num_links, multi, ret;
319 /* get the number of DAI links */
320 if (np && of_get_child_by_name(np, "simple-audio-card,dai-link")) {
321 num_links = of_get_child_count(np);
328 /* allocate the private data and the DAI link array */
329 priv = devm_kzalloc(dev,
330 sizeof(*priv) + sizeof(*dai_link) * num_links,
338 priv->snd_card.owner = THIS_MODULE;
339 priv->snd_card.dev = dev;
340 dai_link = priv->dai_link;
341 priv->snd_card.dai_link = dai_link;
342 priv->snd_card.num_links = num_links;
344 /* get room for the other properties */
345 priv->dai_props = devm_kzalloc(dev,
346 sizeof(*priv->dai_props) * num_links,
348 if (!priv->dai_props)
351 if (np && of_device_is_available(np)) {
353 ret = asoc_simple_card_parse_of(np, priv, dev, multi);
355 if (ret != -EPROBE_DEFER)
356 dev_err(dev, "parse error %d\n", ret);
361 * soc_bind_dai_link() will check cpu name
362 * after of_node matching if dai_link has cpu_dai_name.
363 * but, it will never match if name was created by fmt_single_name()
364 * remove cpu_dai_name to escape name matching.
367 * fmt_multiple_name()
370 dai_link->cpu_dai_name = NULL;
373 struct asoc_simple_card_info *cinfo;
375 cinfo = dev->platform_data;
377 dev_err(dev, "no info for asoc-simple-card\n");
382 !cinfo->codec_dai.name ||
385 !cinfo->cpu_dai.name) {
386 dev_err(dev, "insufficient asoc_simple_card_info settings\n");
390 priv->snd_card.name = (cinfo->card) ? cinfo->card : cinfo->name;
391 dai_link->name = cinfo->name;
392 dai_link->stream_name = cinfo->name;
393 dai_link->platform_name = cinfo->platform;
394 dai_link->codec_name = cinfo->codec;
395 dai_link->cpu_dai_name = cinfo->cpu_dai.name;
396 dai_link->codec_dai_name = cinfo->codec_dai.name;
397 memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
398 sizeof(priv->dai_props->cpu_dai));
399 memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
400 sizeof(priv->dai_props->codec_dai));
402 priv->dai_props->cpu_dai.fmt |= cinfo->daifmt;
403 priv->dai_props->codec_dai.fmt |= cinfo->daifmt;
407 * init snd_soc_dai_link
409 dai_link->init = asoc_simple_card_dai_init;
411 snd_soc_card_set_drvdata(&priv->snd_card, priv);
413 ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
416 asoc_simple_card_unref(pdev);
420 static const struct of_device_id asoc_simple_of_match[] = {
421 { .compatible = "simple-audio-card", },
424 MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
426 static struct platform_driver asoc_simple_card = {
428 .name = "asoc-simple-card",
429 .owner = THIS_MODULE,
430 .of_match_table = asoc_simple_of_match,
432 .probe = asoc_simple_card_probe,
435 module_platform_driver(asoc_simple_card);
437 MODULE_ALIAS("platform:asoc-simple-card");
438 MODULE_LICENSE("GPL");
439 MODULE_DESCRIPTION("ASoC Simple Sound Card");
440 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");