[deliverable/linux.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,
			      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;

	/*
	 * 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_dai_link_of(struct device_node *node,
				   struct device *dev,
				   struct snd_soc_dai_link *dai_link,
				   struct simple_dai_props *dai_props)
{
	struct device_node *np = NULL;
	struct device_node *bitclkmaster = NULL;
	struct device_node *framemaster = NULL;
	unsigned int daifmt;
	char *name;
	char prop[128];
	char *prefix = "";
	int ret;

	prefix = "simple-audio-card,";

	daifmt = snd_soc_of_parse_daifmt(node, prefix,
					 &bitclkmaster, &framemaster);
	daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;

	snprintf(prop, sizeof(prop), "%scpu", prefix);
	np = of_get_child_by_name(node, prop);
	if (!np) {
		ret = -EINVAL;
		dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
		goto dai_link_of_err;
	}

	ret = asoc_simple_card_sub_parse_of(np, &dai_props->cpu_dai,
					    &dai_link->cpu_of_node,
					    &dai_link->cpu_dai_name);
	if (ret < 0)
		goto dai_link_of_err;

	dai_props->cpu_dai.fmt = daifmt;
	switch (((np == bitclkmaster)<<4)|(np == framemaster)) {
	case 0x11:
		dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBS_CFS;
		break;
	case 0x10:
		dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBS_CFM;
		break;
	case 0x01:
		dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBM_CFS;
		break;
	default:
		dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBM_CFM;
		break;
	}

	of_node_put(np);
	snprintf(prop, sizeof(prop), "%scodec", prefix);
	np = of_get_child_by_name(node, prop);
	if (!np) {
		ret = -EINVAL;
		dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
		goto dai_link_of_err;
	}

	ret = asoc_simple_card_sub_parse_of(np, &dai_props->codec_dai,
					    &dai_link->codec_of_node,
					    &dai_link->codec_dai_name);
	if (ret < 0)
		goto dai_link_of_err;

	if (strlen(prefix) && !bitclkmaster && !framemaster) {
		/* No dai-link level and master setting was not found from
		   sound node level, revert back to legacy DT parsing and
		   take the settings from codec node. */
		dev_dbg(dev, "%s: Revert to legacy daifmt parsing\n",
			__func__);
		dai_props->cpu_dai.fmt = dai_props->codec_dai.fmt =
			snd_soc_of_parse_daifmt(np, NULL, NULL, NULL) |
			(daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK);
	} else {
		dai_props->codec_dai.fmt = daifmt;
		switch (((np == bitclkmaster)<<4)|(np == framemaster)) {
		case 0x11:
			dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBM_CFM;
			break;
		case 0x10:
			dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBM_CFS;
			break;
		case 0x01:
			dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBS_CFM;
			break;
		default:
			dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBS_CFS;
			break;
		}
	}

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

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

	/* Link name is created from CPU/CODEC dai name */
	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;

	dev_dbg(dev, "\tname : %s\n", dai_link->stream_name);
	dev_dbg(dev, "\tcpu : %s / %04x / %d\n",
		dai_link->cpu_dai_name,
		dai_props->cpu_dai.fmt,
		dai_props->cpu_dai.sysclk);
	dev_dbg(dev, "\tcodec : %s / %04x / %d\n",
		dai_link->codec_dai_name,
		dai_props->codec_dai.fmt,
		dai_props->codec_dai.sysclk);

dai_link_of_err:
	if (np)
		of_node_put(np);
	if (bitclkmaster)
		of_node_put(bitclkmaster);
	if (framemaster)
		of_node_put(framemaster);
	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;
	int ret;

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

	/* 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;
	}

	dev_dbg(dev, "New simple-card: %s\n", priv->snd_card.name ?
		priv->snd_card.name : "");

	if (multi) {
		struct device_node *np = NULL;
		int i;
		for (i = 0; (np = of_get_next_child(node, np)); i++) {
			dev_dbg(dev, "\tlink %d:\n", i);
			ret = simple_card_dai_link_of(np, dev, dai_link + i,
						      dai_props + i);
			if (ret < 0) {
				of_node_put(np);
				return ret;
			}
		}
	} else {
		ret = simple_card_dai_link_of(node, dev, dai_link, dai_props);
		if (ret < 0)
			return ret;
	}

	if (!priv->snd_card.name)
		priv->snd_card.name = priv->snd_card.dai_link->name;

	return 0;
}

/* 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
	90	asoc_simple_card_sub_parse_of(struct device_node *np,
	91	struct asoc_simple_dai *dai,
52008472 JFM	92	const struct device_node **p_node,
52008472 JFM	93	const char **name)
fa558c28	94	{
201a0eac	95	struct device_node *node;
fa558c28 KM	96	struct clk *clk;
	97	int ret;
	98
	99	/*
	100	* get node via "sound-dai = <&phandle port>"
	101	* it will be used as xxx_of_node on soc_bind_dai_link()
	102	*/
201a0eac JFM	103	node = of_parse_phandle(np, "sound-dai", 0);
201a0eac JFM	104	if (!node)
fa558c28	105	return -ENODEV;
201a0eac	106	*p_node = node;
fa558c28 KM	107
fa558c28 KM	108	/* get dai->name */
52008472	109	ret = snd_soc_of_get_dai_name(np, name);
fa558c28	110	if (ret < 0)
e512e001	111	return ret;
fa558c28	112
6ff62eed XL	113	/* parse TDM slot */
	114	ret = snd_soc_of_parse_tdm_slot(np, &dai->slots, &dai->slot_width);
	115	if (ret)
e512e001	116	return ret;
6ff62eed	117
fa558c28 KM	118	/*
	119	* dai->sysclk come from
	120	* "clocks = <&xxx>" (if system has common clock)
	121	* or "system-clock-frequency = <xxx>"
71467e46	122	* or device's module clock.
fa558c28	123	*/
71467e46 XL	124	if (of_property_read_bool(np, "clocks")) {
	125	clk = of_clk_get(np, 0);
	126	if (IS_ERR(clk)) {
	127	ret = PTR_ERR(clk);
e512e001	128	return ret;
71467e46 XL	129	}
	130
	131	dai->sysclk = clk_get_rate(clk);
	132	} else if (of_property_read_bool(np, "system-clock-frequency")) {
fa558c28 KM	133	of_property_read_u32(np,
	134	"system-clock-frequency",
	135	&dai->sysclk);
71467e46	136	} else {
201a0eac	137	clk = of_clk_get(node, 0);
e2a19ac6 XL	138	if (!IS_ERR(clk))
e2a19ac6 XL	139	dai->sysclk = clk_get_rate(clk);
71467e46	140	}
fa558c28	141
e512e001	142	return 0;
fa558c28 KM	143	}
fa558c28 KM	144
b3ca11ff JS	145	static int simple_card_dai_link_of(struct device_node *node,
	146	struct device *dev,
	147	struct snd_soc_dai_link *dai_link,
	148	struct simple_dai_props *dai_props)
6a91a17b	149	{
b3ca11ff JS	150	struct device_node *np = NULL;
	151	struct device_node *bitclkmaster = NULL;
	152	struct device_node *framemaster = NULL;
	153	unsigned int daifmt;
	154	char *name;
	155	char prop[128];
	156	char *prefix = "";
6a91a17b JFM	157	int ret;
6a91a17b JFM	158
50e6c718	159	prefix = "simple-audio-card,";
b3ca11ff JS	160
	161	daifmt = snd_soc_of_parse_daifmt(node, prefix,
	162	&bitclkmaster, &framemaster);
	163	daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
	164
	165	snprintf(prop, sizeof(prop), "%scpu", prefix);
	166	np = of_get_child_by_name(node, prop);
	167	if (!np) {
	168	ret = -EINVAL;
966b8063	169	dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
b3ca11ff	170	goto dai_link_of_err;
6a91a17b	171	}
b3ca11ff JS	172
	173	ret = asoc_simple_card_sub_parse_of(np, &dai_props->cpu_dai,
	174	&dai_link->cpu_of_node,
	175	&dai_link->cpu_dai_name);
6a91a17b	176	if (ret < 0)
b3ca11ff JS	177	goto dai_link_of_err;
	178
	179	dai_props->cpu_dai.fmt = daifmt;
	180	switch (((np == bitclkmaster)<<4)\|(np == framemaster)) {
	181	case 0x11:
	182	dai_props->cpu_dai.fmt \|= SND_SOC_DAIFMT_CBS_CFS;
	183	break;
	184	case 0x10:
	185	dai_props->cpu_dai.fmt \|= SND_SOC_DAIFMT_CBS_CFM;
	186	break;
	187	case 0x01:
	188	dai_props->cpu_dai.fmt \|= SND_SOC_DAIFMT_CBM_CFS;
	189	break;
	190	default:
	191	dai_props->cpu_dai.fmt \|= SND_SOC_DAIFMT_CBM_CFM;
	192	break;
	193	}
6a91a17b	194
b3ca11ff JS	195	of_node_put(np);
	196	snprintf(prop, sizeof(prop), "%scodec", prefix);
	197	np = of_get_child_by_name(node, prop);
	198	if (!np) {
	199	ret = -EINVAL;
966b8063	200	dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
b3ca11ff	201	goto dai_link_of_err;
6a91a17b	202	}
b3ca11ff JS	203
	204	ret = asoc_simple_card_sub_parse_of(np, &dai_props->codec_dai,
	205	&dai_link->codec_of_node,
	206	&dai_link->codec_dai_name);
	207	if (ret < 0)
	208	goto dai_link_of_err;
	209
	210	if (strlen(prefix) && !bitclkmaster && !framemaster) {
	211	/* No dai-link level and master setting was not found from
	212	sound node level, revert back to legacy DT parsing and
	213	take the settings from codec node. */
	214	dev_dbg(dev, "%s: Revert to legacy daifmt parsing\n",
	215	__func__);
	216	dai_props->cpu_dai.fmt = dai_props->codec_dai.fmt =
	217	snd_soc_of_parse_daifmt(np, NULL, NULL, NULL) \|
	218	(daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK);
	219	} else {
	220	dai_props->codec_dai.fmt = daifmt;
	221	switch (((np == bitclkmaster)<<4)\|(np == framemaster)) {
	222	case 0x11:
	223	dai_props->codec_dai.fmt \|= SND_SOC_DAIFMT_CBM_CFM;
	224	break;
	225	case 0x10:
	226	dai_props->codec_dai.fmt \|= SND_SOC_DAIFMT_CBM_CFS;
	227	break;
	228	case 0x01:
	229	dai_props->codec_dai.fmt \|= SND_SOC_DAIFMT_CBS_CFM;
	230	break;
	231	default:
	232	dai_props->codec_dai.fmt \|= SND_SOC_DAIFMT_CBS_CFS;
	233	break;
	234	}
	235	}
	236
	237	if (!dai_link->cpu_dai_name \|\| !dai_link->codec_dai_name) {
	238	ret = -EINVAL;
	239	goto dai_link_of_err;
	240	}
	241
	242	/* simple-card assumes platform == cpu */
	243	dai_link->platform_of_node = dai_link->cpu_of_node;
	244
	245	/* Link name is created from CPU/CODEC dai name */
	246	name = devm_kzalloc(dev,
	247	strlen(dai_link->cpu_dai_name) +
	248	strlen(dai_link->codec_dai_name) + 2,
	249	GFP_KERNEL);
	250	sprintf(name, "%s-%s", dai_link->cpu_dai_name,
	251	dai_link->codec_dai_name);
	252	dai_link->name = dai_link->stream_name = name;
	253
	254	dev_dbg(dev, "\tname : %s\n", dai_link->stream_name);
	255	dev_dbg(dev, "\tcpu : %s / %04x / %d\n",
	256	dai_link->cpu_dai_name,
	257	dai_props->cpu_dai.fmt,
	258	dai_props->cpu_dai.sysclk);
	259	dev_dbg(dev, "\tcodec : %s / %04x / %d\n",
	260	dai_link->codec_dai_name,
	261	dai_props->codec_dai.fmt,
	262	dai_props->codec_dai.sysclk);
	263
	264	dai_link_of_err:
	265	if (np)
	266	of_node_put(np);
267	if (bitclkmaster)
268	of_node_put(bitclkmaster);
269	if (framemaster)
270	of_node_put(framemaster);
6a91a17b JFM	271	return ret;
	272	}
	273
fa558c28	274	static int asoc_simple_card_parse_of(struct device_node *node,
b367a325	275	struct simple_card_data *priv,
6a91a17b JFM	276	struct device *dev,
6a91a17b JFM	277	int multi)
fa558c28	278	{
b367a325	279	struct snd_soc_dai_link *dai_link = priv->snd_card.dai_link;
6a91a17b	280	struct simple_dai_props *dai_props = priv->dai_props;
d4c22094	281	int ret;
fa558c28	282
2772555b XL	283	/* parsing the card name from DT */
	284	snd_soc_of_parse_card_name(&priv->snd_card, "simple-audio-card,name");
	285
9d681f5b XL	286	/* off-codec widgets */
	287	if (of_property_read_bool(node, "simple-audio-card,widgets")) {
	288	ret = snd_soc_of_parse_audio_simple_widgets(&priv->snd_card,
	289	"simple-audio-card,widgets");
	290	if (ret)
	291	return ret;
	292	}
	293
d4c22094	294	/* DAPM routes */
8c0b8230	295	if (of_property_read_bool(node, "simple-audio-card,routing")) {
b367a325	296	ret = snd_soc_of_parse_audio_routing(&priv->snd_card,
8c0b8230	297	"simple-audio-card,routing");
f87a3e82 XL	298	if (ret)
	299	return ret;
	300	}
d4c22094	301
b3ca11ff JS	302	dev_dbg(dev, "New simple-card: %s\n", priv->snd_card.name ?
	303	priv->snd_card.name : "");
	304
	305	if (multi) {
	306	struct device_node *np = NULL;
	307	int i;
	308	for (i = 0; (np = of_get_next_child(node, np)); i++) {
	309	dev_dbg(dev, "\tlink %d:\n", i);
	310	ret = simple_card_dai_link_of(np, dev, dai_link + i,
	311	dai_props + i);
	312	if (ret < 0) {
	313	of_node_put(np);
	314	return ret;
	315	}
6a91a17b	316	}
b3ca11ff JS	317	} else {
b3ca11ff JS	318	ret = simple_card_dai_link_of(node, dev, dai_link, dai_props);
6a91a17b	319	if (ret < 0)
b3ca11ff	320	return ret;
6a91a17b	321	}
dd41e0c4	322
2772555b	323	if (!priv->snd_card.name)
b3ca11ff	324	priv->snd_card.name = priv->snd_card.dai_link->name;
f687d900	325
fa558c28 KM	326	return 0;
	327	}
	328
e512e001 JFM	329	/* update the reference count of the devices nodes at end of probe */
	330	static int asoc_simple_card_unref(struct platform_device *pdev)
	331	{
	332	struct snd_soc_card *card = platform_get_drvdata(pdev);
	333	struct snd_soc_dai_link *dai_link;
	334	struct device_node *np;
	335	int num_links;
	336
	337	for (num_links = 0, dai_link = card->dai_link;
	338	num_links < card->num_links;
	339	num_links++, dai_link++) {
	340	np = (struct device_node *) dai_link->cpu_of_node;
	341	if (np)
	342	of_node_put(np);
	343	np = (struct device_node *) dai_link->codec_of_node;
	344	if (np)
	345	of_node_put(np);
	346	}
	347	return 0;
	348	}
	349
f2390880 KM	350	static int asoc_simple_card_probe(struct platform_device *pdev)
f2390880 KM	351	{
45fce594	352	struct simple_card_data *priv;
5ca8ba41	353	struct snd_soc_dai_link *dai_link;
fa558c28	354	struct device_node *np = pdev->dev.of_node;
f89983ef	355	struct device *dev = &pdev->dev;
6a91a17b JFM	356	int num_links, multi, ret;
	357
	358	/* get the number of DAI links */
	359	if (np && of_get_child_by_name(np, "simple-audio-card,dai-link")) {
	360	num_links = of_get_child_count(np);
	361	multi = 1;
	362	} else {
	363	num_links = 1;
	364	multi = 0;
	365	}
f2390880	366
cf7dc23c JFM	367	/* allocate the private data and the DAI link array */
cf7dc23c JFM	368	priv = devm_kzalloc(dev,
6a91a17b	369	sizeof(priv) + sizeof(dai_link) * num_links,
cf7dc23c	370	GFP_KERNEL);
ca65b492	371	if (!priv)
ca919fe4 XL	372	return -ENOMEM;
ca919fe4 XL	373
201a0eac JFM	374	/*
	375	* init snd_soc_card
	376	*/
ca65b492 JFM	377	priv->snd_card.owner = THIS_MODULE;
ca65b492 JFM	378	priv->snd_card.dev = dev;
cf7dc23c	379	dai_link = priv->dai_link;
ca65b492	380	priv->snd_card.dai_link = dai_link;
6a91a17b	381	priv->snd_card.num_links = num_links;
201a0eac	382
cf7dc23c JFM	383	/* get room for the other properties */
cf7dc23c JFM	384	priv->dai_props = devm_kzalloc(dev,
6a91a17b	385	sizeof(priv->dai_props) num_links,
cf7dc23c JFM	386	GFP_KERNEL);
	387	if (!priv->dai_props)
	388	return -ENOMEM;
	389
fa558c28	390	if (np && of_device_is_available(np)) {
ca919fe4	391
6a91a17b	392	ret = asoc_simple_card_parse_of(np, priv, dev, multi);
ca919fe4 XL	393	if (ret < 0) {
	394	if (ret != -EPROBE_DEFER)
	395	dev_err(dev, "parse error %d\n", ret);
e512e001	396	goto err;
fa558c28	397	}
6a91a17b JFM	398
	399	/*
	400	* soc_bind_dai_link() will check cpu name
	401	* after of_node matching if dai_link has cpu_dai_name.
	402	* but, it will never match if name was created by fmt_single_name()
	403	* remove cpu_dai_name to escape name matching.
	404	* see
	405	* fmt_single_name()
	406	* fmt_multiple_name()
	407	*/
	408	if (num_links == 1)
	409	dai_link->cpu_dai_name = NULL;
	410
fa558c28	411	} else {
ca65b492 JFM	412	struct asoc_simple_card_info *cinfo;
	413
	414	cinfo = dev->platform_data;
	415	if (!cinfo) {
34787d0a XL	416	dev_err(dev, "no info for asoc-simple-card\n");
	417	return -EINVAL;
	418	}
fa558c28	419
7722f830	420	if (!cinfo->name \|\|
7722f830 JFM	421	!cinfo->codec_dai.name \|\|
	422	!cinfo->codec \|\|
	423	!cinfo->platform \|\|
	424	!cinfo->cpu_dai.name) {
	425	dev_err(dev, "insufficient asoc_simple_card_info settings\n");
	426	return -EINVAL;
	427	}
2bee9914	428
12ffa6fc	429	priv->snd_card.name = (cinfo->card) ? cinfo->card : cinfo->name;
5ca8ba41 JFM	430	dai_link->name = cinfo->name;
	431	dai_link->stream_name = cinfo->name;
	432	dai_link->platform_name = cinfo->platform;
	433	dai_link->codec_name = cinfo->codec;
52008472 JFM	434	dai_link->cpu_dai_name = cinfo->cpu_dai.name;
52008472 JFM	435	dai_link->codec_dai_name = cinfo->codec_dai.name;
cf7dc23c JFM	436	memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
	437	sizeof(priv->dai_props->cpu_dai));
	438	memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
	439	sizeof(priv->dai_props->codec_dai));
81985bd6	440
cf7dc23c JFM	441	priv->dai_props->cpu_dai.fmt \|= cinfo->daifmt;
cf7dc23c JFM	442	priv->dai_props->codec_dai.fmt \|= cinfo->daifmt;
f2390880 KM	443	}
	444
	445	/*
	446	* init snd_soc_dai_link
	447	*/
5ca8ba41	448	dai_link->init = asoc_simple_card_dai_init;
f2390880	449
ca65b492	450	snd_soc_card_set_drvdata(&priv->snd_card, priv);
f2390880	451
e512e001 JFM	452	ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
	453
	454	err:
	455	asoc_simple_card_unref(pdev);
	456	return ret;
f2390880 KM	457	}
f2390880 KM	458
fa558c28 KM	459	static const struct of_device_id asoc_simple_of_match[] = {
	460	{ .compatible = "simple-audio-card", },
	461	{},
	462	};
	463	MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
	464
f2390880 KM	465	static struct platform_driver asoc_simple_card = {
	466	.driver = {
	467	.name = "asoc-simple-card",
c445be35	468	.owner = THIS_MODULE,
fa558c28	469	.of_match_table = asoc_simple_of_match,
f2390880 KM	470	},
f2390880 KM	471	.probe = asoc_simple_card_probe,
f2390880 KM	472	};
	473
	474	module_platform_driver(asoc_simple_card);
	475
c445be35	476	MODULE_ALIAS("platform:asoc-simple-card");
f2390880 KM	477	MODULE_LICENSE("GPL");
	478	MODULE_DESCRIPTION("ASoC Simple Sound Card");
	479	MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");