[mirror_ubuntu-zesty-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/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/string.h>
#include <sound/simple_card.h>

struct simple_card_data {
	struct snd_soc_card snd_card;
	unsigned int daifmt;
	struct asoc_simple_dai cpu_dai;
	struct asoc_simple_dai codec_dai;
	struct snd_soc_dai_link snd_link;
};

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;
		}
	}

	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;
	int ret;

	ret = __asoc_simple_card_dai_init(codec, &priv->codec_dai);
	if (ret < 0)
		return ret;

	ret = __asoc_simple_card_dai_init(cpu, &priv->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)
		goto parse_error;

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

		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);
	}

	ret = 0;

parse_error:
	of_node_put(node);

	return ret;
}

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

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

	/* 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;
	}

	/* 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, priv->daifmt,
						  &priv->cpu_dai,
						  &dai_link->cpu_of_node,
						  &dai_link->cpu_dai_name);
	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, priv->daifmt,
						  &priv->codec_dai,
						  &dai_link->codec_of_node,
						  &dai_link->codec_dai_name);
	if (ret < 0)
		return ret;

	if (!dai_link->cpu_dai_name || !dai_link->codec_dai_name)
		return -EINVAL;

	/* card 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);
	priv->snd_card.name = name;
	dai_link->name = dai_link->stream_name = name;

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

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

	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 ret;

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	/*
	 * init snd_soc_card
	 */
	priv->snd_card.owner = THIS_MODULE;
	priv->snd_card.dev = dev;
	dai_link = &priv->snd_link;
	priv->snd_card.dai_link = dai_link;
	priv->snd_card.num_links = 1;

	if (np && of_device_is_available(np)) {

		ret = asoc_simple_card_parse_of(np, priv, dev);
		if (ret < 0) {
			if (ret != -EPROBE_DEFER)
				dev_err(dev, "parse error %d\n", ret);
			return ret;
		}
	} 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->card	||
		    !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;
		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->cpu_dai, &cinfo->cpu_dai,
						sizeof(priv->cpu_dai));
		memcpy(&priv->codec_dai, &cinfo->codec_dai,
						sizeof(priv->codec_dai));
	}

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

	snd_soc_card_set_drvdata(&priv->snd_card, priv);

	return devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
}

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
	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	*/
	11	#include <linux/clk.h>
	12	#include <linux/module.h>
	13	#include <linux/of.h>
	14	#include <linux/platform_device.h>
	15	#include <linux/string.h>
	16	#include <sound/simple_card.h>
	17
	18	struct simple_card_data {
	19	struct snd_soc_card snd_card;
	20	unsigned int daifmt;
	21	struct asoc_simple_dai cpu_dai;
	22	struct asoc_simple_dai codec_dai;
	23	struct snd_soc_dai_link snd_link;
	24	};
	25
	26	static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai,
	27	struct asoc_simple_dai *set)
	28	{
	29	int ret;
	30
	31	if (set->fmt) {
	32	ret = snd_soc_dai_set_fmt(dai, set->fmt);
	33	if (ret && ret != -ENOTSUPP) {
	34	dev_err(dai->dev, "simple-card: set_fmt error\n");
	35	goto err;
	36	}
	37	}
	38
	39	if (set->sysclk) {
	40	ret = snd_soc_dai_set_sysclk(dai, 0, set->sysclk, 0);
	41	if (ret && ret != -ENOTSUPP) {
	42	dev_err(dai->dev, "simple-card: set_sysclk error\n");
	43	goto err;
	44	}
	45	}
	46
	47	ret = 0;
	48
	49	err:
	50	return ret;
	51	}
	52
	53	static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
	54	{
	55	struct simple_card_data *priv =
	56	snd_soc_card_get_drvdata(rtd->card);
	57	struct snd_soc_dai *codec = rtd->codec_dai;
	58	struct snd_soc_dai *cpu = rtd->cpu_dai;
	59	int ret;
	60
	61	ret = __asoc_simple_card_dai_init(codec, &priv->codec_dai);
	62	if (ret < 0)
	63	return ret;
	64
	65	ret = __asoc_simple_card_dai_init(cpu, &priv->cpu_dai);
	66	if (ret < 0)
	67	return ret;
	68
	69	return 0;
	70	}
	71
	72	static int
	73	asoc_simple_card_sub_parse_of(struct device_node *np,
	74	unsigned int daifmt,
	75	struct asoc_simple_dai *dai,
	76	const struct device_node **p_node,
	77	const char **name)
	78	{
	79	struct device_node *node;
	80	struct clk *clk;
	81	int ret;
	82
	83	/*
	84	* get node via "sound-dai = <&phandle port>"
	85	* it will be used as xxx_of_node on soc_bind_dai_link()
	86	*/
	87	node = of_parse_phandle(np, "sound-dai", 0);
	88	if (!node)
	89	return -ENODEV;
	90	*p_node = node;
	91
	92	/* get dai->name */
	93	ret = snd_soc_of_get_dai_name(np, name);
	94	if (ret < 0)
	95	goto parse_error;
	96
	97	/*
	98	* bitclock-inversion, frame-inversion
	99	* bitclock-master, frame-master
	100	* and specific "format" if it has
	101	*/
	102	dai->fmt = snd_soc_of_parse_daifmt(np, NULL);
	103	dai->fmt \|= daifmt;
	104
	105	/*
	106	* dai->sysclk come from
	107	* "clocks = <&xxx>" (if system has common clock)
	108	* or "system-clock-frequency = <xxx>"
	109	* or device's module clock.
	110	*/
	111	if (of_property_read_bool(np, "clocks")) {
	112	clk = of_clk_get(np, 0);
	113	if (IS_ERR(clk)) {
	114	ret = PTR_ERR(clk);
	115	goto parse_error;
	116	}
	117
	118	dai->sysclk = clk_get_rate(clk);
	119	} else if (of_property_read_bool(np, "system-clock-frequency")) {
	120	of_property_read_u32(np,
	121	"system-clock-frequency",
	122	&dai->sysclk);
	123	} else {
	124	clk = of_clk_get(node, 0);
	125	if (!IS_ERR(clk))
	126	dai->sysclk = clk_get_rate(clk);
	127	}
	128
	129	ret = 0;
	130
	131	parse_error:
	132	of_node_put(node);
	133
	134	return ret;
	135	}
	136
	137	static int asoc_simple_card_parse_of(struct device_node *node,
	138	struct simple_card_data *priv,
	139	struct device *dev)
	140	{
	141	struct snd_soc_dai_link *dai_link = priv->snd_card.dai_link;
	142	struct device_node *np;
	143	char *name;
	144	int ret;
	145
	146	/* get CPU/CODEC common format via simple-audio-card,format */
	147	priv->daifmt = snd_soc_of_parse_daifmt(node, "simple-audio-card,") &
	148	(SND_SOC_DAIFMT_FORMAT_MASK \| SND_SOC_DAIFMT_INV_MASK);
	149
	150	/* DAPM routes */
	151	if (of_property_read_bool(node, "simple-audio-card,routing")) {
	152	ret = snd_soc_of_parse_audio_routing(&priv->snd_card,
	153	"simple-audio-card,routing");
	154	if (ret)
	155	return ret;
	156	}
	157
	158	/* CPU sub-node */
	159	ret = -EINVAL;
	160	np = of_get_child_by_name(node, "simple-audio-card,cpu");
	161	if (np)
	162	ret = asoc_simple_card_sub_parse_of(np, priv->daifmt,
	163	&priv->cpu_dai,
	164	&dai_link->cpu_of_node,
	165	&dai_link->cpu_dai_name);
	166	if (ret < 0)
	167	return ret;
	168
	169	/* CODEC sub-node */
	170	ret = -EINVAL;
	171	np = of_get_child_by_name(node, "simple-audio-card,codec");
	172	if (np)
	173	ret = asoc_simple_card_sub_parse_of(np, priv->daifmt,
	174	&priv->codec_dai,
	175	&dai_link->codec_of_node,
	176	&dai_link->codec_dai_name);
	177	if (ret < 0)
	178	return ret;
	179
	180	if (!dai_link->cpu_dai_name \|\| !dai_link->codec_dai_name)
	181	return -EINVAL;
	182
	183	/* card name is created from CPU/CODEC dai name */
	184	name = devm_kzalloc(dev,
	185	strlen(dai_link->cpu_dai_name) +
	186	strlen(dai_link->codec_dai_name) + 2,
	187	GFP_KERNEL);
	188	sprintf(name, "%s-%s", dai_link->cpu_dai_name,
	189	dai_link->codec_dai_name);
	190	priv->snd_card.name = name;
	191	dai_link->name = dai_link->stream_name = name;
	192
	193	/* simple-card assumes platform == cpu */
	194	dai_link->platform_of_node = dai_link->cpu_of_node;
	195
	196	dev_dbg(dev, "card-name : %s\n", name);
	197	dev_dbg(dev, "platform : %04x\n", priv->daifmt);
	198	dev_dbg(dev, "cpu : %s / %04x / %d\n",
	199	dai_link->cpu_dai_name,
	200	priv->cpu_dai.fmt,
	201	priv->cpu_dai.sysclk);
	202	dev_dbg(dev, "codec : %s / %04x / %d\n",
	203	dai_link->codec_dai_name,
	204	priv->codec_dai.fmt,
	205	priv->codec_dai.sysclk);
	206
	207	return 0;
	208	}
	209
	210	static int asoc_simple_card_probe(struct platform_device *pdev)
	211	{
	212	struct simple_card_data *priv;
	213	struct snd_soc_dai_link *dai_link;
	214	struct device_node *np = pdev->dev.of_node;
	215	struct device *dev = &pdev->dev;
	216	int ret;
	217
	218	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	219	if (!priv)
	220	return -ENOMEM;
	221
	222	/*
	223	* init snd_soc_card
	224	*/
	225	priv->snd_card.owner = THIS_MODULE;
	226	priv->snd_card.dev = dev;
	227	dai_link = &priv->snd_link;
	228	priv->snd_card.dai_link = dai_link;
	229	priv->snd_card.num_links = 1;
	230
	231	if (np && of_device_is_available(np)) {
	232
	233	ret = asoc_simple_card_parse_of(np, priv, dev);
	234	if (ret < 0) {
	235	if (ret != -EPROBE_DEFER)
	236	dev_err(dev, "parse error %d\n", ret);
	237	return ret;
	238	}
	239	} else {
	240	struct asoc_simple_card_info *cinfo;
	241
	242	cinfo = dev->platform_data;
	243	if (!cinfo) {
	244	dev_err(dev, "no info for asoc-simple-card\n");
	245	return -EINVAL;
	246	}
	247
	248	if (!cinfo->name \|\|
	249	!cinfo->card \|\|
	250	!cinfo->codec_dai.name \|\|
	251	!cinfo->codec \|\|
	252	!cinfo->platform \|\|
	253	!cinfo->cpu_dai.name) {
	254	dev_err(dev, "insufficient asoc_simple_card_info settings\n");
	255	return -EINVAL;
	256	}
	257
	258	priv->snd_card.name = cinfo->card;
	259	dai_link->name = cinfo->name;
	260	dai_link->stream_name = cinfo->name;
	261	dai_link->platform_name = cinfo->platform;
	262	dai_link->codec_name = cinfo->codec;
	263	dai_link->cpu_dai_name = cinfo->cpu_dai.name;
	264	dai_link->codec_dai_name = cinfo->codec_dai.name;
	265	memcpy(&priv->cpu_dai, &cinfo->cpu_dai,
	266	sizeof(priv->cpu_dai));
	267	memcpy(&priv->codec_dai, &cinfo->codec_dai,
	268	sizeof(priv->codec_dai));
	269	}
	270
	271	/*
	272	* init snd_soc_dai_link
	273	*/
	274	dai_link->init = asoc_simple_card_dai_init;
	275
	276	snd_soc_card_set_drvdata(&priv->snd_card, priv);
	277
	278	return devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
	279	}
	280
	281	static const struct of_device_id asoc_simple_of_match[] = {
	282	{ .compatible = "simple-audio-card", },
	283	{},
	284	};
	285	MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
	286
	287	static struct platform_driver asoc_simple_card = {
	288	.driver = {
	289	.name = "asoc-simple-card",
	290	.owner = THIS_MODULE,
	291	.of_match_table = asoc_simple_of_match,
	292	},
	293	.probe = asoc_simple_card_probe,
	294	};
	295
	296	module_platform_driver(asoc_simple_card);
	297
	298	MODULE_ALIAS("platform:asoc-simple-card");
	299	MODULE_LICENSE("GPL");
	300	MODULE_DESCRIPTION("ASoC Simple Sound Card");
	301	MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");