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Commit aba611fc authored by Sylwester Nawrocki's avatar Sylwester Nawrocki Committed by Mark Brown
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ASoC: samsung: Add Odroid ASoC machine driver 



This dedicated driver allows to support SoC specific clock
settings and helps to ensure proper number of channels gets
negotiated in multicodec system configurations.

Signed-off-by: default avatarSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 92c9f05e

sound/soc/samsung/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -185,6 +185,14 @@ config SND_SOC_SNOW 
	  Say Y if you want to add audio support for various Snow

	  boards based on Exynos5 series of SoCs.



config SND_SOC_ODROID

	tristate "Audio support for Odroid XU3/XU4"

	depends on SND_SOC_SAMSUNG && I2C

	select SND_SOC_MAX98090

	select SND_SAMSUNG_I2S

	help

	  Say Y here to enable audio support for the Odroid XU3/XU4.



config SND_SOC_ARNDALE_RT5631_ALC5631

        tristate "Audio support for RT5631(ALC5631) on Arndale Board"

        depends on I2C

sound/soc/samsung/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ snd-soc-tobermory-objs := tobermory.o 
snd-soc-lowland-objs := lowland.o

snd-soc-littlemill-objs := littlemill.o

snd-soc-bells-objs := bells.o

snd-soc-odroid-objs := odroid.o

snd-soc-arndale-rt5631-objs := arndale_rt5631.o

snd-soc-tm2-wm5110-objs := tm2_wm5110.o
@@ -62,5 +63,6 @@ obj-$(CONFIG_SND_SOC_TOBERMORY) += snd-soc-tobermory.o 
obj-$(CONFIG_SND_SOC_LOWLAND) += snd-soc-lowland.o

obj-$(CONFIG_SND_SOC_LITTLEMILL) += snd-soc-littlemill.o

obj-$(CONFIG_SND_SOC_BELLS) += snd-soc-bells.o

obj-$(CONFIG_SND_SOC_ODROID) += snd-soc-odroid.o

obj-$(CONFIG_SND_SOC_ARNDALE_RT5631_ALC5631) += snd-soc-arndale-rt5631.o

obj-$(CONFIG_SND_SOC_SAMSUNG_TM2_WM5110) += snd-soc-tm2-wm5110.o

sound/soc/samsung/odroid.c

0 → 100644
+219 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2017 Samsung Electronics Co., Ltd.

 *

 * 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/of.h>

#include <linux/of_device.h>

#include <linux/module.h>

#include <sound/soc.h>

#include <sound/pcm_params.h>

#include "i2s.h"

#include "i2s-regs.h"



struct odroid_priv {

	struct snd_soc_card card;

	struct snd_soc_dai_link dai_link;



	struct clk *pll;

	struct clk *rclk;

};



static int odroid_card_startup(struct snd_pcm_substream *substream)

{

	struct snd_pcm_runtime *runtime = substream->runtime;



	snd_pcm_hw_constraint_single(runtime, SNDRV_PCM_HW_PARAM_CHANNELS, 2);

	return 0;

}



static int odroid_card_hw_params(struct snd_pcm_substream *substream,

				      struct snd_pcm_hw_params *params)

{

	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	struct odroid_priv *priv = snd_soc_card_get_drvdata(rtd->card);

	unsigned int pll_freq, rclk_freq;

	int ret;



	switch (params_rate(params)) {

	case 32000:

	case 64000:

		pll_freq = 131072000U;

		break;

	case 44100:

	case 88200:

	case 176400:

		pll_freq = 180633600U;

		break;

	case 48000:

	case 96000:

	case 192000:

		pll_freq = 196608000U;

		break;

	default:

		return -EINVAL;

	}



	ret = clk_set_rate(priv->pll, pll_freq + 1);

	if (ret < 0)

		return ret;



	rclk_freq = params_rate(params) * 256 * 4;



	ret = clk_set_rate(priv->rclk, rclk_freq);

	if (ret < 0)

		return ret;



	if (rtd->num_codecs > 1) {

		struct snd_soc_dai *codec_dai = rtd->codec_dais[1];



		ret = snd_soc_dai_set_sysclk(codec_dai, 0, rclk_freq,

					     SND_SOC_CLOCK_IN);

		if (ret < 0)

			return ret;

	}



	return 0;

}



static const struct snd_soc_ops odroid_card_ops = {

	.startup = odroid_card_startup,

	.hw_params = odroid_card_hw_params,

};



static void odroid_put_codec_of_nodes(struct snd_soc_dai_link *link)

{

	struct snd_soc_dai_link_component *component = link->codecs;

	int i;



	for (i = 0; i < link->num_codecs; i++, component++) {

		if (!component->of_node)

			break;

		of_node_put(component->of_node);

	}

}



static int odroid_audio_probe(struct platform_device *pdev)

{

	struct device *dev = &pdev->dev;

	struct device_node *cpu, *codec;

	struct odroid_priv *priv;

	struct snd_soc_dai_link *link;

	struct snd_soc_card *card;

	int ret;



	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);

	if (!priv)

		return -ENOMEM;



	card = &priv->card;

	card->dev = dev;



	card->owner = THIS_MODULE;

	card->fully_routed = true;



	snd_soc_card_set_drvdata(card, priv);



	priv->pll = devm_clk_get(dev, "epll");

	if (IS_ERR(priv->pll))

		return PTR_ERR(priv->pll);



	priv->rclk = devm_clk_get(dev, "i2s_rclk");

	if (IS_ERR(priv->rclk))

		return PTR_ERR(priv->rclk);



	ret = snd_soc_of_parse_card_name(card, "model");

	if (ret < 0)

		return ret;



	if (of_property_read_bool(dev->of_node, "samsung,audio-widgets")) {

		ret = snd_soc_of_parse_audio_simple_widgets(card,

						"samsung,audio-widgets");

		if (ret < 0)

			return ret;

	}



	if (of_property_read_bool(dev->of_node, "samsung,audio-routing")) {

		ret = snd_soc_of_parse_audio_routing(card,

						"samsung,audio-routing");

		if (ret < 0)

			return ret;

	}



	link = &priv->dai_link;



	link->ops = &odroid_card_ops;

	link->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |

			SND_SOC_DAIFMT_CBS_CFS;



	card->dai_link = &priv->dai_link;

	card->num_links = 1;



	cpu = of_get_child_by_name(dev->of_node, "cpu");

	codec = of_get_child_by_name(dev->of_node, "codec");



	link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0);

	if (!link->cpu_of_node) {

		dev_err(dev, "Failed parsing cpu/sound-dai property\n");

		return -EINVAL;

	}



	ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);

	if (ret < 0)

		goto err_put_codec_n;



	link->platform_of_node = link->cpu_of_node;



	link->name = "Primary";

	link->stream_name = link->name;



	ret = devm_snd_soc_register_card(dev, card);

	if (ret < 0) {

		dev_err(dev, "snd_soc_register_card() failed: %d\n", ret);

		goto err_put_i2s_n;

	}



	return 0;



err_put_i2s_n:

	of_node_put(link->cpu_of_node);

err_put_codec_n:

	odroid_put_codec_of_nodes(link);

	return ret;

}



static int odroid_audio_remove(struct platform_device *pdev)

{

	struct odroid_priv *priv = platform_get_drvdata(pdev);



	of_node_put(priv->dai_link.cpu_of_node);

	odroid_put_codec_of_nodes(&priv->dai_link);



	return 0;

}



static const struct of_device_id odroid_audio_of_match[] = {

	{ .compatible	= "samsung,odroid-xu3-audio" },

	{ .compatible	= "samsung,odroid-xu4-audio"},

	{ },

};

MODULE_DEVICE_TABLE(of, odroid_audio_of_match);



static struct platform_driver odroid_audio_driver = {

	.driver = {

		.name		= "odroid-audio",

		.of_match_table	= odroid_audio_of_match,

		.pm		= &snd_soc_pm_ops,

	},

	.probe	= odroid_audio_probe,

	.remove	= odroid_audio_remove,

};

module_platform_driver(odroid_audio_driver);



MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");

MODULE_DESCRIPTION("Odroid XU3/XU4 audio support");

MODULE_LICENSE("GPL v2");