[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;
	unsigned int mclk_fs;
	struct snd_soc_dai_link dai_link[];	/* dynamically allocated */
};

static int asoc_simple_card_hw_params(struct snd_pcm_substream *substream,
				      struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
	unsigned int mclk;
	int ret = 0;

	if (priv->mclk_fs) {
		mclk = params_rate(params) * priv->mclk_fs;
		ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
					     SND_SOC_CLOCK_IN);
	}

	return ret;
}

static struct snd_soc_ops asoc_simple_card_ops = {
	.hw_params = asoc_simple_card_hw_params,
};

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,
			      struct device_node **p_node,
			      const char **name,
			      int *args_count)
{
	struct of_phandle_args args;
	struct device_node *node;
	struct clk *clk;
	u32 val;
	int ret;

	/*
	 * get node via "sound-dai = <&phandle port>"
	 * it will be used as xxx_of_node on soc_bind_dai_link()
	 */
	ret = of_parse_phandle_with_args(np, "sound-dai",
					 "#sound-dai-cells", 0, &args);
	if (ret)
		return ret;

	*p_node = args.np;

	if (args_count)
		*args_count = args.args_count;

	/* 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_u32(np, "system-clock-frequency", &val)) {
		dai->sysclk = val;
	} else {
		clk = of_clk_get(node, 0);
		if (!IS_ERR(clk))
			dai->sysclk = clk_get_rate(clk);
	}

	return 0;
}

static int asoc_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,
					bool is_top_level_node)
{
	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, cpu_args;

	if (is_top_level_node)
		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,
					    &cpu_args);
	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, NULL);
	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;
	dai_link->ops = &asoc_simple_card_ops;
	dai_link->init = asoc_simple_card_dai_init;

	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);

	/*
	 * 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 if cpu_args was 0.
	 * see
	 *	fmt_single_name()
	 *	fmt_multiple_name()
	 */
	if (!cpu_args)
		dai_link->cpu_dai_name = NULL;

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;
	u32 val;
	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;
	}

	/* Factor to mclk, used in hw_params() */
	ret = of_property_read_u32(node, "simple-audio-card,mclk-fs", &val);
	if (ret == 0)
		priv->mclk_fs = val;

	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 = 0;

		for_each_child_of_node(node, np) {
			dev_dbg(dev, "\tlink %d:\n", i);
			ret = asoc_simple_card_dai_link_of(np, dev,
							   dai_link + i,
							   dai_props + i,
							   false);
			if (ret < 0) {
				of_node_put(np);
				return ret;
			}
			i++;
		}
	} else {
		ret = asoc_simple_card_dai_link_of(node, dev,
						   dai_link, dai_props, true);
		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;
		}

	} 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;
		dai_link->init		= asoc_simple_card_dai_init;
		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;
	}

	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;
2942a0e2	27	unsigned int mclk_fs;
cf7dc23c	28	struct snd_soc_dai_link dai_link[]; /* dynamically allocated */
45fce594 JFM	29	};
45fce594 JFM	30
2942a0e2 AL	31	static int asoc_simple_card_hw_params(struct snd_pcm_substream *substream,
	32	struct snd_pcm_hw_params *params)
	33	{
	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);
	37	unsigned int mclk;
	38	int ret = 0;
	39
	40	if (priv->mclk_fs) {
	41	mclk = params_rate(params) * priv->mclk_fs;
	42	ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
	43	SND_SOC_CLOCK_IN);
	44	}
	45
	46	return ret;
	47	}
	48
	49	static struct snd_soc_ops asoc_simple_card_ops = {
	50	.hw_params = asoc_simple_card_hw_params,
	51	};
	52
a4a2992c	53	static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai,
30d0341e	54	struct asoc_simple_dai *set)
a4a2992c	55	{
4763ebe2	56	int ret;
a4a2992c	57
30d0341e XL	58	if (set->fmt) {
30d0341e XL	59	ret = snd_soc_dai_set_fmt(dai, set->fmt);
4763ebe2 XL	60	if (ret && ret != -ENOTSUPP) {
	61	dev_err(dai->dev, "simple-card: set_fmt error\n");
	62	goto err;
	63	}
e244bb9b KM	64	}
e244bb9b KM	65
4763ebe2	66	if (set->sysclk) {
a4a2992c	67	ret = snd_soc_dai_set_sysclk(dai, 0, set->sysclk, 0);
4763ebe2 XL	68	if (ret && ret != -ENOTSUPP) {
	69	dev_err(dai->dev, "simple-card: set_sysclk error\n");
	70	goto err;
	71	}
	72	}
	73
6ff62eed XL	74	if (set->slots) {
	75	ret = snd_soc_dai_set_tdm_slot(dai, 0, 0,
	76	set->slots,
	77	set->slot_width);
	78	if (ret && ret != -ENOTSUPP) {
	79	dev_err(dai->dev, "simple-card: set_tdm_slot error\n");
	80	goto err;
	81	}
	82	}
	83
4763ebe2	84	ret = 0;
a4a2992c	85
4763ebe2	86	err:
a4a2992c KM	87	return ret;
	88	}
	89
f2390880 KM	90	static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
f2390880 KM	91	{
781cbebe	92	struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
f2390880 KM	93	struct snd_soc_dai *codec = rtd->codec_dai;
f2390880 KM	94	struct snd_soc_dai *cpu = rtd->cpu_dai;
6a91a17b JFM	95	struct simple_dai_props *dai_props;
6a91a17b JFM	96	int num, ret;
f2390880	97
6a91a17b JFM	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);
a4a2992c KM	101	if (ret < 0)
a4a2992c KM	102	return ret;
f2390880	103
6a91a17b	104	ret = __asoc_simple_card_dai_init(cpu, &dai_props->cpu_dai);
a4a2992c KM	105	if (ret < 0)
a4a2992c KM	106	return ret;
f2390880 KM	107
	108	return 0;
	109	}
	110
fa558c28 KM	111	static int
	112	asoc_simple_card_sub_parse_of(struct device_node *np,
	113	struct asoc_simple_dai *dai,
8ea21348	114	struct device_node **p_node,
7c7b9cf5 KM	115	const char **name,
7c7b9cf5 KM	116	int *args_count)
fa558c28	117	{
7c7b9cf5	118	struct of_phandle_args args;
201a0eac	119	struct device_node *node;
fa558c28	120	struct clk *clk;
c7099eb1	121	u32 val;
fa558c28 KM	122	int ret;
	123
	124	/*
	125	* get node via "sound-dai = <&phandle port>"
	126	* it will be used as xxx_of_node on soc_bind_dai_link()
	127	*/
7c7b9cf5 KM	128	ret = of_parse_phandle_with_args(np, "sound-dai",
	129	"#sound-dai-cells", 0, &args);
	130	if (ret)
	131	return ret;
	132
	133	*p_node = args.np;
	134
	135	if (args_count)
	136	*args_count = args.args_count;
fa558c28 KM	137
fa558c28 KM	138	/* get dai->name */
52008472	139	ret = snd_soc_of_get_dai_name(np, name);
fa558c28	140	if (ret < 0)
e512e001	141	return ret;
fa558c28	142
6ff62eed XL	143	/* parse TDM slot */
	144	ret = snd_soc_of_parse_tdm_slot(np, &dai->slots, &dai->slot_width);
	145	if (ret)
e512e001	146	return ret;
6ff62eed	147
fa558c28 KM	148	/*
	149	* dai->sysclk come from
	150	* "clocks = <&xxx>" (if system has common clock)
	151	* or "system-clock-frequency = <xxx>"
71467e46	152	* or device's module clock.
fa558c28	153	*/
71467e46 XL	154	if (of_property_read_bool(np, "clocks")) {
	155	clk = of_clk_get(np, 0);
	156	if (IS_ERR(clk)) {
	157	ret = PTR_ERR(clk);
e512e001	158	return ret;
71467e46 XL	159	}
	160
	161	dai->sysclk = clk_get_rate(clk);
c7099eb1 JS	162	} else if (!of_property_read_u32(np, "system-clock-frequency", &val)) {
c7099eb1 JS	163	dai->sysclk = val;
71467e46	164	} else {
201a0eac	165	clk = of_clk_get(node, 0);
e2a19ac6 XL	166	if (!IS_ERR(clk))
e2a19ac6 XL	167	dai->sysclk = clk_get_rate(clk);
71467e46	168	}
fa558c28	169
e512e001	170	return 0;
fa558c28 KM	171	}
fa558c28 KM	172
2d82eeb0 KM	173	static int asoc_simple_card_dai_link_of(struct device_node *node,
	174	struct device *dev,
	175	struct snd_soc_dai_link *dai_link,
	176	struct simple_dai_props *dai_props,
	177	bool is_top_level_node)
6a91a17b	178	{
b3ca11ff JS	179	struct device_node *np = NULL;
	180	struct device_node *bitclkmaster = NULL;
	181	struct device_node *framemaster = NULL;
	182	unsigned int daifmt;
	183	char *name;
	184	char prop[128];
	185	char *prefix = "";
7c7b9cf5	186	int ret, cpu_args;
6a91a17b	187
64872215 JS	188	if (is_top_level_node)
64872215 JS	189	prefix = "simple-audio-card,";
b3ca11ff JS	190
	191	daifmt = snd_soc_of_parse_daifmt(node, prefix,
	192	&bitclkmaster, &framemaster);
	193	daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
	194
	195	snprintf(prop, sizeof(prop), "%scpu", prefix);
	196	np = of_get_child_by_name(node, prop);
	197	if (!np) {
	198	ret = -EINVAL;
966b8063	199	dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
b3ca11ff	200	goto dai_link_of_err;
6a91a17b	201	}
b3ca11ff JS	202
	203	ret = asoc_simple_card_sub_parse_of(np, &dai_props->cpu_dai,
	204	&dai_link->cpu_of_node,
7c7b9cf5 KM	205	&dai_link->cpu_dai_name,
7c7b9cf5 KM	206	&cpu_args);
6a91a17b	207	if (ret < 0)
b3ca11ff JS	208	goto dai_link_of_err;
	209
	210	dai_props->cpu_dai.fmt = daifmt;
781cbebe	211	switch (((np == bitclkmaster) << 4) \| (np == framemaster)) {
b3ca11ff JS	212	case 0x11:
	213	dai_props->cpu_dai.fmt \|= SND_SOC_DAIFMT_CBS_CFS;
	214	break;
	215	case 0x10:
	216	dai_props->cpu_dai.fmt \|= SND_SOC_DAIFMT_CBS_CFM;
	217	break;
	218	case 0x01:
	219	dai_props->cpu_dai.fmt \|= SND_SOC_DAIFMT_CBM_CFS;
	220	break;
	221	default:
	222	dai_props->cpu_dai.fmt \|= SND_SOC_DAIFMT_CBM_CFM;
	223	break;
	224	}
6a91a17b	225
b3ca11ff JS	226	of_node_put(np);
	227	snprintf(prop, sizeof(prop), "%scodec", prefix);
	228	np = of_get_child_by_name(node, prop);
	229	if (!np) {
	230	ret = -EINVAL;
966b8063	231	dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
b3ca11ff	232	goto dai_link_of_err;
6a91a17b	233	}
b3ca11ff JS	234
	235	ret = asoc_simple_card_sub_parse_of(np, &dai_props->codec_dai,
	236	&dai_link->codec_of_node,
7c7b9cf5	237	&dai_link->codec_dai_name, NULL);
b3ca11ff JS	238	if (ret < 0)
	239	goto dai_link_of_err;
	240
	241	if (strlen(prefix) && !bitclkmaster && !framemaster) {
	242	/* No dai-link level and master setting was not found from
	243	sound node level, revert back to legacy DT parsing and
	244	take the settings from codec node. */
	245	dev_dbg(dev, "%s: Revert to legacy daifmt parsing\n",
	246	__func__);
	247	dai_props->cpu_dai.fmt = dai_props->codec_dai.fmt =
	248	snd_soc_of_parse_daifmt(np, NULL, NULL, NULL) \|
	249	(daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK);
	250	} else {
	251	dai_props->codec_dai.fmt = daifmt;
781cbebe	252	switch (((np == bitclkmaster) << 4) \| (np == framemaster)) {
b3ca11ff JS	253	case 0x11:
	254	dai_props->codec_dai.fmt \|= SND_SOC_DAIFMT_CBM_CFM;
	255	break;
	256	case 0x10:
	257	dai_props->codec_dai.fmt \|= SND_SOC_DAIFMT_CBM_CFS;
	258	break;
	259	case 0x01:
	260	dai_props->codec_dai.fmt \|= SND_SOC_DAIFMT_CBS_CFM;
	261	break;
	262	default:
	263	dai_props->codec_dai.fmt \|= SND_SOC_DAIFMT_CBS_CFS;
	264	break;
	265	}
	266	}
	267
	268	if (!dai_link->cpu_dai_name \|\| !dai_link->codec_dai_name) {
781cbebe NC	269	ret = -EINVAL;
781cbebe NC	270	goto dai_link_of_err;
b3ca11ff JS	271	}
	272
	273	/* simple-card assumes platform == cpu */
	274	dai_link->platform_of_node = dai_link->cpu_of_node;
	275
	276	/* Link name is created from CPU/CODEC dai name */
	277	name = devm_kzalloc(dev,
	278	strlen(dai_link->cpu_dai_name) +
	279	strlen(dai_link->codec_dai_name) + 2,
	280	GFP_KERNEL);
	281	sprintf(name, "%s-%s", dai_link->cpu_dai_name,
	282	dai_link->codec_dai_name);
	283	dai_link->name = dai_link->stream_name = name;
2942a0e2	284	dai_link->ops = &asoc_simple_card_ops;
a5960bd5	285	dai_link->init = asoc_simple_card_dai_init;
b3ca11ff JS	286
	287	dev_dbg(dev, "\tname : %s\n", dai_link->stream_name);
	288	dev_dbg(dev, "\tcpu : %s / %04x / %d\n",
	289	dai_link->cpu_dai_name,
	290	dai_props->cpu_dai.fmt,
	291	dai_props->cpu_dai.sysclk);
	292	dev_dbg(dev, "\tcodec : %s / %04x / %d\n",
	293	dai_link->codec_dai_name,
	294	dai_props->codec_dai.fmt,
	295	dai_props->codec_dai.sysclk);
	296
179949bc KM	297	/*
	298	* soc_bind_dai_link() will check cpu name
	299	* after of_node matching if dai_link has cpu_dai_name.
	300	* but, it will never match if name was created by fmt_single_name()
7c7b9cf5	301	* remove cpu_dai_name if cpu_args was 0.
179949bc KM	302	* see
	303	* fmt_single_name()
	304	* fmt_multiple_name()
	305	*/
7c7b9cf5 KM	306	if (!cpu_args)
7c7b9cf5 KM	307	dai_link->cpu_dai_name = NULL;
179949bc	308
b3ca11ff JS	309	dai_link_of_err:
	310	if (np)
	311	of_node_put(np);
	312	if (bitclkmaster)
	313	of_node_put(bitclkmaster);
	314	if (framemaster)
	315	of_node_put(framemaster);
6a91a17b JFM	316	return ret;
	317	}
	318
fa558c28	319	static int asoc_simple_card_parse_of(struct device_node *node,
b367a325	320	struct simple_card_data *priv,
6a91a17b JFM	321	struct device *dev,
6a91a17b JFM	322	int multi)
fa558c28	323	{
b367a325	324	struct snd_soc_dai_link *dai_link = priv->snd_card.dai_link;
6a91a17b	325	struct simple_dai_props *dai_props = priv->dai_props;
c7099eb1	326	u32 val;
d4c22094	327	int ret;
fa558c28	328
2772555b XL	329	/* parsing the card name from DT */
	330	snd_soc_of_parse_card_name(&priv->snd_card, "simple-audio-card,name");
	331
9d681f5b XL	332	/* off-codec widgets */
	333	if (of_property_read_bool(node, "simple-audio-card,widgets")) {
	334	ret = snd_soc_of_parse_audio_simple_widgets(&priv->snd_card,
	335	"simple-audio-card,widgets");
	336	if (ret)
	337	return ret;
	338	}
	339
d4c22094	340	/* DAPM routes */
8c0b8230	341	if (of_property_read_bool(node, "simple-audio-card,routing")) {
b367a325	342	ret = snd_soc_of_parse_audio_routing(&priv->snd_card,
8c0b8230	343	"simple-audio-card,routing");
f87a3e82 XL	344	if (ret)
	345	return ret;
	346	}
d4c22094	347
2942a0e2	348	/* Factor to mclk, used in hw_params() */
c7099eb1 JS	349	ret = of_property_read_u32(node, "simple-audio-card,mclk-fs", &val);
	350	if (ret == 0)
	351	priv->mclk_fs = val;
2942a0e2	352
b3ca11ff JS	353	dev_dbg(dev, "New simple-card: %s\n", priv->snd_card.name ?
	354	priv->snd_card.name : "");
	355
	356	if (multi) {
	357	struct device_node *np = NULL;
a44a750e KM	358	int i = 0;
	359
	360	for_each_child_of_node(node, np) {
b3ca11ff	361	dev_dbg(dev, "\tlink %d:\n", i);
2d82eeb0 KM	362	ret = asoc_simple_card_dai_link_of(np, dev,
	363	dai_link + i,
	364	dai_props + i,
	365	false);
b3ca11ff JS	366	if (ret < 0) {
	367	of_node_put(np);
	368	return ret;
	369	}
a44a750e	370	i++;
6a91a17b	371	}
b3ca11ff	372	} else {
2d82eeb0 KM	373	ret = asoc_simple_card_dai_link_of(node, dev,
2d82eeb0 KM	374	dai_link, dai_props, true);
6a91a17b	375	if (ret < 0)
b3ca11ff	376	return ret;
6a91a17b	377	}
dd41e0c4	378
2772555b	379	if (!priv->snd_card.name)
b3ca11ff	380	priv->snd_card.name = priv->snd_card.dai_link->name;
f687d900	381
fa558c28 KM	382	return 0;
	383	}
	384
e512e001 JFM	385	/* update the reference count of the devices nodes at end of probe */
	386	static int asoc_simple_card_unref(struct platform_device *pdev)
	387	{
	388	struct snd_soc_card *card = platform_get_drvdata(pdev);
	389	struct snd_soc_dai_link *dai_link;
	390	struct device_node *np;
	391	int num_links;
	392
	393	for (num_links = 0, dai_link = card->dai_link;
	394	num_links < card->num_links;
	395	num_links++, dai_link++) {
	396	np = (struct device_node *) dai_link->cpu_of_node;
	397	if (np)
	398	of_node_put(np);
	399	np = (struct device_node *) dai_link->codec_of_node;
	400	if (np)
	401	of_node_put(np);
	402	}
	403	return 0;
	404	}
	405
f2390880 KM	406	static int asoc_simple_card_probe(struct platform_device *pdev)
f2390880 KM	407	{
45fce594	408	struct simple_card_data *priv;
5ca8ba41	409	struct snd_soc_dai_link *dai_link;
fa558c28	410	struct device_node *np = pdev->dev.of_node;
f89983ef	411	struct device *dev = &pdev->dev;
6a91a17b JFM	412	int num_links, multi, ret;
	413
	414	/* get the number of DAI links */
	415	if (np && of_get_child_by_name(np, "simple-audio-card,dai-link")) {
	416	num_links = of_get_child_count(np);
	417	multi = 1;
	418	} else {
	419	num_links = 1;
	420	multi = 0;
	421	}
f2390880	422
cf7dc23c JFM	423	/* allocate the private data and the DAI link array */
cf7dc23c JFM	424	priv = devm_kzalloc(dev,
6a91a17b	425	sizeof(priv) + sizeof(dai_link) * num_links,
cf7dc23c	426	GFP_KERNEL);
ca65b492	427	if (!priv)
ca919fe4 XL	428	return -ENOMEM;
ca919fe4 XL	429
201a0eac JFM	430	/*
	431	* init snd_soc_card
	432	*/
ca65b492 JFM	433	priv->snd_card.owner = THIS_MODULE;
ca65b492 JFM	434	priv->snd_card.dev = dev;
cf7dc23c	435	dai_link = priv->dai_link;
ca65b492	436	priv->snd_card.dai_link = dai_link;
6a91a17b	437	priv->snd_card.num_links = num_links;
201a0eac	438
cf7dc23c JFM	439	/* get room for the other properties */
cf7dc23c JFM	440	priv->dai_props = devm_kzalloc(dev,
6a91a17b	441	sizeof(priv->dai_props) num_links,
cf7dc23c JFM	442	GFP_KERNEL);
	443	if (!priv->dai_props)
	444	return -ENOMEM;
	445
fa558c28	446	if (np && of_device_is_available(np)) {
ca919fe4	447
6a91a17b	448	ret = asoc_simple_card_parse_of(np, priv, dev, multi);
ca919fe4 XL	449	if (ret < 0) {
	450	if (ret != -EPROBE_DEFER)
	451	dev_err(dev, "parse error %d\n", ret);
e512e001	452	goto err;
fa558c28	453	}
6a91a17b	454
fa558c28	455	} else {
ca65b492 JFM	456	struct asoc_simple_card_info *cinfo;
	457
	458	cinfo = dev->platform_data;
	459	if (!cinfo) {
34787d0a XL	460	dev_err(dev, "no info for asoc-simple-card\n");
	461	return -EINVAL;
	462	}
fa558c28	463
781cbebe NC	464	if (!cinfo->name \|\|
	465	!cinfo->codec_dai.name \|\|
	466	!cinfo->codec \|\|
	467	!cinfo->platform \|\|
7722f830 JFM	468	!cinfo->cpu_dai.name) {
	469	dev_err(dev, "insufficient asoc_simple_card_info settings\n");
	470	return -EINVAL;
	471	}
2bee9914	472
12ffa6fc	473	priv->snd_card.name = (cinfo->card) ? cinfo->card : cinfo->name;
5ca8ba41 JFM	474	dai_link->name = cinfo->name;
	475	dai_link->stream_name = cinfo->name;
	476	dai_link->platform_name = cinfo->platform;
	477	dai_link->codec_name = cinfo->codec;
52008472 JFM	478	dai_link->cpu_dai_name = cinfo->cpu_dai.name;
52008472 JFM	479	dai_link->codec_dai_name = cinfo->codec_dai.name;
a5960bd5	480	dai_link->init = asoc_simple_card_dai_init;
cf7dc23c JFM	481	memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
	482	sizeof(priv->dai_props->cpu_dai));
	483	memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
	484	sizeof(priv->dai_props->codec_dai));
81985bd6	485
cf7dc23c JFM	486	priv->dai_props->cpu_dai.fmt \|= cinfo->daifmt;
cf7dc23c JFM	487	priv->dai_props->codec_dai.fmt \|= cinfo->daifmt;
f2390880 KM	488	}
f2390880 KM	489
ca65b492	490	snd_soc_card_set_drvdata(&priv->snd_card, priv);
f2390880	491
e512e001 JFM	492	ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
	493
	494	err:
	495	asoc_simple_card_unref(pdev);
	496	return ret;
f2390880 KM	497	}
f2390880 KM	498
fa558c28 KM	499	static const struct of_device_id asoc_simple_of_match[] = {
	500	{ .compatible = "simple-audio-card", },
	501	{},
	502	};
	503	MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
	504
f2390880 KM	505	static struct platform_driver asoc_simple_card = {
f2390880 KM	506	.driver = {
781cbebe	507	.name = "asoc-simple-card",
c445be35	508	.owner = THIS_MODULE,
fa558c28	509	.of_match_table = asoc_simple_of_match,
f2390880	510	},
781cbebe	511	.probe = asoc_simple_card_probe,
f2390880 KM	512	};
	513
	514	module_platform_driver(asoc_simple_card);
	515
c445be35	516	MODULE_ALIAS("platform:asoc-simple-card");
f2390880 KM	517	MODULE_LICENSE("GPL");
	518	MODULE_DESCRIPTION("ASoC Simple Sound Card");
	519	MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");