[mirror_ubuntu-bionic-kernel.git] / sound / soc / generic / simple-card.c

/*
 * ASoC simple sound card support
 *
 * Copyright (C) 2012 Renesas Solutions Corp.
 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/string.h>
#include <sound/simple_card.h>
#include <sound/soc-dai.h>
#include <sound/soc.h>

struct simple_card_data {
	struct snd_soc_card snd_card;
	struct simple_dai_props {
		struct asoc_simple_dai cpu_dai;
		struct asoc_simple_dai codec_dai;
	} *dai_props;
	struct snd_soc_dai_link dai_link[];	/* dynamically allocated */
};

static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai,
				       struct asoc_simple_dai *set)
{
	int ret;

	if (set->fmt) {
		ret = snd_soc_dai_set_fmt(dai, set->fmt);
		if (ret && ret != -ENOTSUPP) {
			dev_err(dai->dev, "simple-card: set_fmt error\n");
			goto err;
		}
	}

	if (set->sysclk) {
		ret = snd_soc_dai_set_sysclk(dai, 0, set->sysclk, 0);
		if (ret && ret != -ENOTSUPP) {
			dev_err(dai->dev, "simple-card: set_sysclk error\n");
			goto err;
		}
	}

	if (set->slots) {
		ret = snd_soc_dai_set_tdm_slot(dai, 0, 0,
						set->slots,
						set->slot_width);
		if (ret && ret != -ENOTSUPP) {
			dev_err(dai->dev, "simple-card: set_tdm_slot error\n");
			goto err;
		}
	}

	ret = 0;

err:
	return ret;
}

static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
{
	struct simple_card_data *priv =
				snd_soc_card_get_drvdata(rtd->card);
	struct snd_soc_dai *codec = rtd->codec_dai;
	struct snd_soc_dai *cpu = rtd->cpu_dai;
	struct simple_dai_props *dai_props;
	int num, ret;

	num = rtd - rtd->card->rtd;
	dai_props = &priv->dai_props[num];
	ret = __asoc_simple_card_dai_init(codec, &dai_props->codec_dai);
	if (ret < 0)
		return ret;

	ret = __asoc_simple_card_dai_init(cpu, &dai_props->cpu_dai);
	if (ret < 0)
		return ret;

	return 0;
}

static int
asoc_simple_card_sub_parse_of(struct device_node *np,
			      unsigned int daifmt,
			      struct asoc_simple_dai *dai,
			      const struct device_node **p_node,
			      const char **name)
{
	struct device_node *node;
	struct clk *clk;
	int ret;

	/*
	 * get node via "sound-dai = <&phandle port>"
	 * it will be used as xxx_of_node on soc_bind_dai_link()
	 */
	node = of_parse_phandle(np, "sound-dai", 0);
	if (!node)
		return -ENODEV;
	*p_node = node;

	/* get dai->name */
	ret = snd_soc_of_get_dai_name(np, name);
	if (ret < 0)
		return ret;

	/* parse TDM slot */
	ret = snd_soc_of_parse_tdm_slot(np, &dai->slots, &dai->slot_width);
	if (ret)
		return ret;

	/*
	 * bitclock-inversion, frame-inversion
	 * bitclock-master,    frame-master
	 * and specific "format" if it has
	 */
	dai->fmt = snd_soc_of_parse_daifmt(np, NULL, NULL, NULL);
	dai->fmt |= daifmt;

	/*
	 * dai->sysclk come from
	 *  "clocks = <&xxx>" (if system has common clock)
	 *  or "system-clock-frequency = <xxx>"
	 *  or device's module clock.
	 */
	if (of_property_read_bool(np, "clocks")) {
		clk = of_clk_get(np, 0);
		if (IS_ERR(clk)) {
			ret = PTR_ERR(clk);
			return ret;
		}

		dai->sysclk = clk_get_rate(clk);
	} else if (of_property_read_bool(np, "system-clock-frequency")) {
		of_property_read_u32(np,
				     "system-clock-frequency",
				     &dai->sysclk);
	} else {
		clk = of_clk_get(node, 0);
		if (!IS_ERR(clk))
			dai->sysclk = clk_get_rate(clk);
	}

	return 0;
}

static int simple_card_cpu_codec_of(struct device_node *node,
				int daifmt,
				struct snd_soc_dai_link *dai_link,
				struct simple_dai_props *dai_props)
{
	struct device_node *np;
	int ret;

	/* CPU sub-node */
	ret = -EINVAL;
	np = of_get_child_by_name(node, "simple-audio-card,cpu");
	if (np) {
		ret = asoc_simple_card_sub_parse_of(np, daifmt,
						&dai_props->cpu_dai,
						&dai_link->cpu_of_node,
						&dai_link->cpu_dai_name);
		of_node_put(np);
	}
	if (ret < 0)
		return ret;

	/* CODEC sub-node */
	ret = -EINVAL;
	np = of_get_child_by_name(node, "simple-audio-card,codec");
	if (np) {
		ret = asoc_simple_card_sub_parse_of(np, daifmt,
						&dai_props->codec_dai,
						&dai_link->codec_of_node,
						&dai_link->codec_dai_name);
		of_node_put(np);
	}
	return ret;
}

static int asoc_simple_card_parse_of(struct device_node *node,
				     struct simple_card_data *priv,
				     struct device *dev,
				     int multi)
{
	struct snd_soc_dai_link *dai_link = priv->snd_card.dai_link;
	struct simple_dai_props *dai_props = priv->dai_props;
	struct device_node *np;
	char *name;
	unsigned int daifmt;
	int ret;

	/* parsing the card name from DT */
	snd_soc_of_parse_card_name(&priv->snd_card, "simple-audio-card,name");

	/* get CPU/CODEC common format via simple-audio-card,format */
	daifmt = snd_soc_of_parse_daifmt(node, "simple-audio-card,", NULL,
					 NULL) &
		(SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK);

	/* off-codec widgets */
	if (of_property_read_bool(node, "simple-audio-card,widgets")) {
		ret = snd_soc_of_parse_audio_simple_widgets(&priv->snd_card,
					"simple-audio-card,widgets");
		if (ret)
			return ret;
	}

	/* DAPM routes */
	if (of_property_read_bool(node, "simple-audio-card,routing")) {
		ret = snd_soc_of_parse_audio_routing(&priv->snd_card,
					"simple-audio-card,routing");
		if (ret)
			return ret;
	}

	/* loop on the DAI links */
	np = NULL;
	for (;;) {
		if (multi) {
			np = of_get_next_child(node, np);
			if (!np)
				break;
		}

		ret = simple_card_cpu_codec_of(multi ? np : node,
					daifmt, dai_link, dai_props);
		if (ret < 0)
			goto err;

		/*
		 * overwrite cpu_dai->fmt as its DAIFMT_MASTER bit is based on CODEC
		 * while the other bits should be identical unless buggy SW/HW design.
		 */
		dai_props->cpu_dai.fmt = dai_props->codec_dai.fmt;

		if (!dai_link->cpu_dai_name || !dai_link->codec_dai_name) {
			ret = -EINVAL;
			goto err;
		}

		/* simple-card assumes platform == cpu */
		dai_link->platform_of_node = dai_link->cpu_of_node;

		name = devm_kzalloc(dev,
				    strlen(dai_link->cpu_dai_name)   +
				    strlen(dai_link->codec_dai_name) + 2,
				    GFP_KERNEL);
		sprintf(name, "%s-%s", dai_link->cpu_dai_name,
					dai_link->codec_dai_name);
		dai_link->name = dai_link->stream_name = name;

		if (!multi)
			break;

		dai_link++;
		dai_props++;
	}

	/* card name is created from CPU/CODEC dai name */
	dai_link = priv->snd_card.dai_link;
	if (!priv->snd_card.name)
		priv->snd_card.name = dai_link->name;

	dev_dbg(dev, "card-name : %s\n", priv->snd_card.name);
	dev_dbg(dev, "platform : %04x\n", daifmt);
	dai_props = priv->dai_props;
	dev_dbg(dev, "cpu : %s / %04x / %d\n",
		dai_link->cpu_dai_name,
		dai_props->cpu_dai.fmt,
		dai_props->cpu_dai.sysclk);
	dev_dbg(dev, "codec : %s / %04x / %d\n",
		dai_link->codec_dai_name,
		dai_props->codec_dai.fmt,
		dai_props->codec_dai.sysclk);

	return 0;

err:
	of_node_put(np);
	return ret;
}

/* update the reference count of the devices nodes at end of probe */
static int asoc_simple_card_unref(struct platform_device *pdev)
{
	struct snd_soc_card *card = platform_get_drvdata(pdev);
	struct snd_soc_dai_link *dai_link;
	struct device_node *np;
	int num_links;

	for (num_links = 0, dai_link = card->dai_link;
	     num_links < card->num_links;
	     num_links++, dai_link++) {
		np = (struct device_node *) dai_link->cpu_of_node;
		if (np)
			of_node_put(np);
		np = (struct device_node *) dai_link->codec_of_node;
		if (np)
			of_node_put(np);
	}
	return 0;
}

static int asoc_simple_card_probe(struct platform_device *pdev)
{
	struct simple_card_data *priv;
	struct snd_soc_dai_link *dai_link;
	struct device_node *np = pdev->dev.of_node;
	struct device *dev = &pdev->dev;
	int num_links, multi, ret;

	/* get the number of DAI links */
	if (np && of_get_child_by_name(np, "simple-audio-card,dai-link")) {
		num_links = of_get_child_count(np);
		multi = 1;
	} else {
		num_links = 1;
		multi = 0;
	}

	/* allocate the private data and the DAI link array */
	priv = devm_kzalloc(dev,
			sizeof(*priv) + sizeof(*dai_link) * num_links,
			GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	/*
	 * init snd_soc_card
	 */
	priv->snd_card.owner = THIS_MODULE;
	priv->snd_card.dev = dev;
	dai_link = priv->dai_link;
	priv->snd_card.dai_link = dai_link;
	priv->snd_card.num_links = num_links;

	/* get room for the other properties */
	priv->dai_props = devm_kzalloc(dev,
			sizeof(*priv->dai_props) * num_links,
			GFP_KERNEL);
	if (!priv->dai_props)
		return -ENOMEM;

	if (np && of_device_is_available(np)) {

		ret = asoc_simple_card_parse_of(np, priv, dev, multi);
		if (ret < 0) {
			if (ret != -EPROBE_DEFER)
				dev_err(dev, "parse error %d\n", ret);
			goto err;
		}

		/*
		 * soc_bind_dai_link() will check cpu name
		 * after of_node matching if dai_link has cpu_dai_name.
		 * but, it will never match if name was created by fmt_single_name()
		 * remove cpu_dai_name to escape name matching.
		 * see
		 *	fmt_single_name()
		 *	fmt_multiple_name()
		 */
		if (num_links == 1)
			dai_link->cpu_dai_name = NULL;

	} else {
		struct asoc_simple_card_info *cinfo;

		cinfo = dev->platform_data;
		if (!cinfo) {
			dev_err(dev, "no info for asoc-simple-card\n");
			return -EINVAL;
		}

		if (!cinfo->name	||
		    !cinfo->codec_dai.name	||
		    !cinfo->codec	||
		    !cinfo->platform	||
		    !cinfo->cpu_dai.name) {
			dev_err(dev, "insufficient asoc_simple_card_info settings\n");
			return -EINVAL;
		}

		priv->snd_card.name	= (cinfo->card) ? cinfo->card : cinfo->name;
		dai_link->name		= cinfo->name;
		dai_link->stream_name	= cinfo->name;
		dai_link->platform_name	= cinfo->platform;
		dai_link->codec_name	= cinfo->codec;
		dai_link->cpu_dai_name	= cinfo->cpu_dai.name;
		dai_link->codec_dai_name = cinfo->codec_dai.name;
		memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
					sizeof(priv->dai_props->cpu_dai));
		memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
					sizeof(priv->dai_props->codec_dai));

		priv->dai_props->cpu_dai.fmt	|= cinfo->daifmt;
		priv->dai_props->codec_dai.fmt	|= cinfo->daifmt;
	}

	/*
	 * init snd_soc_dai_link
	 */
	dai_link->init = asoc_simple_card_dai_init;

	snd_soc_card_set_drvdata(&priv->snd_card, priv);

	ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);

err:
	asoc_simple_card_unref(pdev);
	return ret;
}

static const struct of_device_id asoc_simple_of_match[] = {
	{ .compatible = "simple-audio-card", },
	{},
};
MODULE_DEVICE_TABLE(of, asoc_simple_of_match);

static struct platform_driver asoc_simple_card = {
	.driver = {
		.name	= "asoc-simple-card",
		.owner = THIS_MODULE,
		.of_match_table = asoc_simple_of_match,
	},
	.probe		= asoc_simple_card_probe,
};

module_platform_driver(asoc_simple_card);

MODULE_ALIAS("platform:asoc-simple-card");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("ASoC Simple Sound Card");
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
Commit	Line	Data
f2390880 KM	1	/*
	2	* ASoC simple sound card support
	3	*
	4	* Copyright (C) 2012 Renesas Solutions Corp.
	5	* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
	6	*
	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.
	10	*/
fa558c28	11	#include <linux/clk.h>
6ff62eed	12	#include <linux/device.h>
f2390880	13	#include <linux/module.h>
fa558c28	14	#include <linux/of.h>
f2390880	15	#include <linux/platform_device.h>
ca919fe4	16	#include <linux/string.h>
f2390880	17	#include <sound/simple_card.h>
6ff62eed XL	18	#include <sound/soc-dai.h>
6ff62eed XL	19	#include <sound/soc.h>
f2390880	20
45fce594 JFM	21	struct simple_card_data {
45fce594 JFM	22	struct snd_soc_card snd_card;
cf7dc23c JFM	23	struct simple_dai_props {
	24	struct asoc_simple_dai cpu_dai;
	25	struct asoc_simple_dai codec_dai;
	26	} *dai_props;
	27	struct snd_soc_dai_link dai_link[]; /* dynamically allocated */
45fce594 JFM	28	};
45fce594 JFM	29
a4a2992c	30	static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai,
30d0341e	31	struct asoc_simple_dai *set)
a4a2992c	32	{
4763ebe2	33	int ret;
a4a2992c	34
30d0341e XL	35	if (set->fmt) {
30d0341e XL	36	ret = snd_soc_dai_set_fmt(dai, set->fmt);
4763ebe2 XL	37	if (ret && ret != -ENOTSUPP) {
	38	dev_err(dai->dev, "simple-card: set_fmt error\n");
	39	goto err;
	40	}
e244bb9b KM	41	}
e244bb9b KM	42
4763ebe2	43	if (set->sysclk) {
a4a2992c	44	ret = snd_soc_dai_set_sysclk(dai, 0, set->sysclk, 0);
4763ebe2 XL	45	if (ret && ret != -ENOTSUPP) {
	46	dev_err(dai->dev, "simple-card: set_sysclk error\n");
	47	goto err;
	48	}
	49	}
	50
6ff62eed XL	51	if (set->slots) {
	52	ret = snd_soc_dai_set_tdm_slot(dai, 0, 0,
	53	set->slots,
	54	set->slot_width);
	55	if (ret && ret != -ENOTSUPP) {
	56	dev_err(dai->dev, "simple-card: set_tdm_slot error\n");
	57	goto err;
	58	}
	59	}
	60
4763ebe2	61	ret = 0;
a4a2992c	62
4763ebe2	63	err:
a4a2992c KM	64	return ret;
	65	}
	66
f2390880 KM	67	static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
f2390880 KM	68	{
b367a325	69	struct simple_card_data *priv =
ba194a4d	70	snd_soc_card_get_drvdata(rtd->card);
f2390880 KM	71	struct snd_soc_dai *codec = rtd->codec_dai;
f2390880 KM	72	struct snd_soc_dai *cpu = rtd->cpu_dai;
6a91a17b JFM	73	struct simple_dai_props *dai_props;
6a91a17b JFM	74	int num, ret;
f2390880	75
6a91a17b JFM	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);
a4a2992c KM	79	if (ret < 0)
a4a2992c KM	80	return ret;
f2390880	81
6a91a17b	82	ret = __asoc_simple_card_dai_init(cpu, &dai_props->cpu_dai);
a4a2992c KM	83	if (ret < 0)
a4a2992c KM	84	return ret;
f2390880 KM	85
	86	return 0;
	87	}
	88
fa558c28 KM	89	static int
fa558c28 KM	90	asoc_simple_card_sub_parse_of(struct device_node *np,
30d0341e	91	unsigned int daifmt,
fa558c28	92	struct asoc_simple_dai *dai,
52008472 JFM	93	const struct device_node **p_node,
52008472 JFM	94	const char **name)
fa558c28	95	{
201a0eac	96	struct device_node *node;
fa558c28 KM	97	struct clk *clk;
	98	int ret;
	99
	100	/*
	101	* get node via "sound-dai = <&phandle port>"
	102	* it will be used as xxx_of_node on soc_bind_dai_link()
	103	*/
201a0eac JFM	104	node = of_parse_phandle(np, "sound-dai", 0);
201a0eac JFM	105	if (!node)
fa558c28	106	return -ENODEV;
201a0eac	107	*p_node = node;
fa558c28 KM	108
fa558c28 KM	109	/* get dai->name */
52008472	110	ret = snd_soc_of_get_dai_name(np, name);
fa558c28	111	if (ret < 0)
e512e001	112	return ret;
fa558c28	113
6ff62eed XL	114	/* parse TDM slot */
	115	ret = snd_soc_of_parse_tdm_slot(np, &dai->slots, &dai->slot_width);
	116	if (ret)
e512e001	117	return ret;
6ff62eed	118
fa558c28 KM	119	/*
	120	* bitclock-inversion, frame-inversion
	121	* bitclock-master, frame-master
	122	* and specific "format" if it has
	123	*/
389cb834	124	dai->fmt = snd_soc_of_parse_daifmt(np, NULL, NULL, NULL);
30d0341e	125	dai->fmt \|= daifmt;
fa558c28 KM	126
	127	/*
	128	* dai->sysclk come from
	129	* "clocks = <&xxx>" (if system has common clock)
	130	* or "system-clock-frequency = <xxx>"
71467e46	131	* or device's module clock.
fa558c28	132	*/
71467e46 XL	133	if (of_property_read_bool(np, "clocks")) {
	134	clk = of_clk_get(np, 0);
	135	if (IS_ERR(clk)) {
	136	ret = PTR_ERR(clk);
e512e001	137	return ret;
71467e46 XL	138	}
	139
	140	dai->sysclk = clk_get_rate(clk);
	141	} else if (of_property_read_bool(np, "system-clock-frequency")) {
fa558c28 KM	142	of_property_read_u32(np,
	143	"system-clock-frequency",
	144	&dai->sysclk);
71467e46	145	} else {
201a0eac	146	clk = of_clk_get(node, 0);
e2a19ac6 XL	147	if (!IS_ERR(clk))
e2a19ac6 XL	148	dai->sysclk = clk_get_rate(clk);
71467e46	149	}
fa558c28	150
e512e001	151	return 0;
fa558c28 KM	152	}
fa558c28 KM	153
6a91a17b JFM	154	static int simple_card_cpu_codec_of(struct device_node *node,
	155	int daifmt,
	156	struct snd_soc_dai_link *dai_link,
	157	struct simple_dai_props *dai_props)
	158	{
	159	struct device_node *np;
	160	int ret;
	161
	162	/* CPU sub-node */
	163	ret = -EINVAL;
	164	np = of_get_child_by_name(node, "simple-audio-card,cpu");
	165	if (np) {
	166	ret = asoc_simple_card_sub_parse_of(np, daifmt,
	167	&dai_props->cpu_dai,
	168	&dai_link->cpu_of_node,
	169	&dai_link->cpu_dai_name);
	170	of_node_put(np);
	171	}
	172	if (ret < 0)
	173	return ret;
	174
	175	/* CODEC sub-node */
	176	ret = -EINVAL;
	177	np = of_get_child_by_name(node, "simple-audio-card,codec");
	178	if (np) {
	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);
	183	of_node_put(np);
	184	}
	185	return ret;
	186	}
	187
fa558c28	188	static int asoc_simple_card_parse_of(struct device_node *node,
b367a325	189	struct simple_card_data *priv,
6a91a17b JFM	190	struct device *dev,
6a91a17b JFM	191	int multi)
fa558c28	192	{
b367a325	193	struct snd_soc_dai_link *dai_link = priv->snd_card.dai_link;
6a91a17b	194	struct simple_dai_props *dai_props = priv->dai_props;
fa558c28 KM	195	struct device_node *np;
fa558c28 KM	196	char *name;
c56c4d74	197	unsigned int daifmt;
d4c22094	198	int ret;
fa558c28	199
2772555b XL	200	/* parsing the card name from DT */
	201	snd_soc_of_parse_card_name(&priv->snd_card, "simple-audio-card,name");
	202
fa558c28	203	/* get CPU/CODEC common format via simple-audio-card,format */
389cb834 JS	204	daifmt = snd_soc_of_parse_daifmt(node, "simple-audio-card,", NULL,
389cb834 JS	205	NULL) &
fa558c28 KM	206	(SND_SOC_DAIFMT_FORMAT_MASK \| SND_SOC_DAIFMT_INV_MASK);
fa558c28 KM	207
9d681f5b XL	208	/* off-codec widgets */
	209	if (of_property_read_bool(node, "simple-audio-card,widgets")) {
	210	ret = snd_soc_of_parse_audio_simple_widgets(&priv->snd_card,
	211	"simple-audio-card,widgets");
	212	if (ret)
	213	return ret;
	214	}
	215
d4c22094	216	/* DAPM routes */
8c0b8230	217	if (of_property_read_bool(node, "simple-audio-card,routing")) {
b367a325	218	ret = snd_soc_of_parse_audio_routing(&priv->snd_card,
8c0b8230	219	"simple-audio-card,routing");
f87a3e82 XL	220	if (ret)
	221	return ret;
	222	}
d4c22094	223
6a91a17b JFM	224	/* loop on the DAI links */
	225	np = NULL;
	226	for (;;) {
	227	if (multi) {
	228	np = of_get_next_child(node, np);
	229	if (!np)
	230	break;
	231	}
fa558c28	232
6a91a17b JFM	233	ret = simple_card_cpu_codec_of(multi ? np : node,
	234	daifmt, dai_link, dai_props);
	235	if (ret < 0)
	236	goto err;
fa558c28	237
6a91a17b JFM	238	/*
	239	* overwrite cpu_dai->fmt as its DAIFMT_MASTER bit is based on CODEC
	240	* while the other bits should be identical unless buggy SW/HW design.
	241	*/
	242	dai_props->cpu_dai.fmt = dai_props->codec_dai.fmt;
	243
	244	if (!dai_link->cpu_dai_name \|\| !dai_link->codec_dai_name) {
	245	ret = -EINVAL;
	246	goto err;
	247	}
	248
	249	/* simple-card assumes platform == cpu */
	250	dai_link->platform_of_node = dai_link->cpu_of_node;
46c39cae	251
6a91a17b JFM	252	name = devm_kzalloc(dev,
	253	strlen(dai_link->cpu_dai_name) +
	254	strlen(dai_link->codec_dai_name) + 2,
	255	GFP_KERNEL);
	256	sprintf(name, "%s-%s", dai_link->cpu_dai_name,
	257	dai_link->codec_dai_name);
	258	dai_link->name = dai_link->stream_name = name;
	259
	260	if (!multi)
	261	break;
	262
	263	dai_link++;
	264	dai_props++;
	265	}
dd41e0c4	266
fa558c28	267	/* card name is created from CPU/CODEC dai name */
6a91a17b	268	dai_link = priv->snd_card.dai_link;
2772555b	269	if (!priv->snd_card.name)
6a91a17b	270	priv->snd_card.name = dai_link->name;
fa558c28	271
6a91a17b	272	dev_dbg(dev, "card-name : %s\n", priv->snd_card.name);
c56c4d74	273	dev_dbg(dev, "platform : %04x\n", daifmt);
6a91a17b	274	dai_props = priv->dai_props;
fa558c28	275	dev_dbg(dev, "cpu : %s / %04x / %d\n",
52008472	276	dai_link->cpu_dai_name,
6a91a17b JFM	277	dai_props->cpu_dai.fmt,
6a91a17b JFM	278	dai_props->cpu_dai.sysclk);
fa558c28	279	dev_dbg(dev, "codec : %s / %04x / %d\n",
52008472	280	dai_link->codec_dai_name,
6a91a17b JFM	281	dai_props->codec_dai.fmt,
6a91a17b JFM	282	dai_props->codec_dai.sysclk);
f687d900	283
fa558c28	284	return 0;
6a91a17b JFM	285
	286	err:
	287	of_node_put(np);
	288	return ret;
fa558c28 KM	289	}
fa558c28 KM	290
e512e001 JFM	291	/* update the reference count of the devices nodes at end of probe */
	292	static int asoc_simple_card_unref(struct platform_device *pdev)
	293	{
	294	struct snd_soc_card *card = platform_get_drvdata(pdev);
	295	struct snd_soc_dai_link *dai_link;
	296	struct device_node *np;
	297	int num_links;
	298
	299	for (num_links = 0, dai_link = card->dai_link;
	300	num_links < card->num_links;
	301	num_links++, dai_link++) {
	302	np = (struct device_node *) dai_link->cpu_of_node;
	303	if (np)
	304	of_node_put(np);
	305	np = (struct device_node *) dai_link->codec_of_node;
	306	if (np)
	307	of_node_put(np);
	308	}
	309	return 0;
	310	}
	311
f2390880 KM	312	static int asoc_simple_card_probe(struct platform_device *pdev)
f2390880 KM	313	{
45fce594	314	struct simple_card_data *priv;
5ca8ba41	315	struct snd_soc_dai_link *dai_link;
fa558c28	316	struct device_node *np = pdev->dev.of_node;
f89983ef	317	struct device *dev = &pdev->dev;
6a91a17b JFM	318	int num_links, multi, ret;
	319
	320	/* get the number of DAI links */
	321	if (np && of_get_child_by_name(np, "simple-audio-card,dai-link")) {
	322	num_links = of_get_child_count(np);
	323	multi = 1;
	324	} else {
	325	num_links = 1;
	326	multi = 0;
	327	}
f2390880	328
cf7dc23c JFM	329	/* allocate the private data and the DAI link array */
cf7dc23c JFM	330	priv = devm_kzalloc(dev,
6a91a17b	331	sizeof(priv) + sizeof(dai_link) * num_links,
cf7dc23c	332	GFP_KERNEL);
ca65b492	333	if (!priv)
ca919fe4 XL	334	return -ENOMEM;
ca919fe4 XL	335
201a0eac JFM	336	/*
	337	* init snd_soc_card
	338	*/
ca65b492 JFM	339	priv->snd_card.owner = THIS_MODULE;
ca65b492 JFM	340	priv->snd_card.dev = dev;
cf7dc23c	341	dai_link = priv->dai_link;
ca65b492	342	priv->snd_card.dai_link = dai_link;
6a91a17b	343	priv->snd_card.num_links = num_links;
201a0eac	344
cf7dc23c JFM	345	/* get room for the other properties */
cf7dc23c JFM	346	priv->dai_props = devm_kzalloc(dev,
6a91a17b	347	sizeof(priv->dai_props) num_links,
cf7dc23c JFM	348	GFP_KERNEL);
	349	if (!priv->dai_props)
	350	return -ENOMEM;
	351
fa558c28	352	if (np && of_device_is_available(np)) {
ca919fe4	353
6a91a17b	354	ret = asoc_simple_card_parse_of(np, priv, dev, multi);
ca919fe4 XL	355	if (ret < 0) {
	356	if (ret != -EPROBE_DEFER)
	357	dev_err(dev, "parse error %d\n", ret);
e512e001	358	goto err;
fa558c28	359	}
6a91a17b JFM	360
	361	/*
	362	* soc_bind_dai_link() will check cpu name
	363	* after of_node matching if dai_link has cpu_dai_name.
	364	* but, it will never match if name was created by fmt_single_name()
	365	* remove cpu_dai_name to escape name matching.
	366	* see
	367	* fmt_single_name()
	368	* fmt_multiple_name()
	369	*/
	370	if (num_links == 1)
	371	dai_link->cpu_dai_name = NULL;
	372
fa558c28	373	} else {
ca65b492 JFM	374	struct asoc_simple_card_info *cinfo;
	375
	376	cinfo = dev->platform_data;
	377	if (!cinfo) {
34787d0a XL	378	dev_err(dev, "no info for asoc-simple-card\n");
	379	return -EINVAL;
	380	}
fa558c28	381
7722f830	382	if (!cinfo->name \|\|
7722f830 JFM	383	!cinfo->codec_dai.name \|\|
	384	!cinfo->codec \|\|
	385	!cinfo->platform \|\|
	386	!cinfo->cpu_dai.name) {
	387	dev_err(dev, "insufficient asoc_simple_card_info settings\n");
	388	return -EINVAL;
	389	}
2bee9914	390
12ffa6fc	391	priv->snd_card.name = (cinfo->card) ? cinfo->card : cinfo->name;
5ca8ba41 JFM	392	dai_link->name = cinfo->name;
	393	dai_link->stream_name = cinfo->name;
	394	dai_link->platform_name = cinfo->platform;
	395	dai_link->codec_name = cinfo->codec;
52008472 JFM	396	dai_link->cpu_dai_name = cinfo->cpu_dai.name;
52008472 JFM	397	dai_link->codec_dai_name = cinfo->codec_dai.name;
cf7dc23c JFM	398	memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
	399	sizeof(priv->dai_props->cpu_dai));
	400	memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
	401	sizeof(priv->dai_props->codec_dai));
81985bd6	402
cf7dc23c JFM	403	priv->dai_props->cpu_dai.fmt \|= cinfo->daifmt;
cf7dc23c JFM	404	priv->dai_props->codec_dai.fmt \|= cinfo->daifmt;
f2390880 KM	405	}
	406
	407	/*
	408	* init snd_soc_dai_link
	409	*/
5ca8ba41	410	dai_link->init = asoc_simple_card_dai_init;
f2390880	411
ca65b492	412	snd_soc_card_set_drvdata(&priv->snd_card, priv);
f2390880	413
e512e001 JFM	414	ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
	415
	416	err:
	417	asoc_simple_card_unref(pdev);
	418	return ret;
f2390880 KM	419	}
f2390880 KM	420
fa558c28 KM	421	static const struct of_device_id asoc_simple_of_match[] = {
	422	{ .compatible = "simple-audio-card", },
	423	{},
	424	};
	425	MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
	426
f2390880 KM	427	static struct platform_driver asoc_simple_card = {
	428	.driver = {
	429	.name = "asoc-simple-card",
c445be35	430	.owner = THIS_MODULE,
fa558c28	431	.of_match_table = asoc_simple_of_match,
f2390880 KM	432	},
f2390880 KM	433	.probe = asoc_simple_card_probe,
f2390880 KM	434	};
	435
	436	module_platform_driver(asoc_simple_card);
	437
c445be35	438	MODULE_ALIAS("platform:asoc-simple-card");
f2390880 KM	439	MODULE_LICENSE("GPL");
	440	MODULE_DESCRIPTION("ASoC Simple Sound Card");
	441	MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");