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[RFC,6/7] ASoC: samsung: Add Odroid ASoC machine driver

Message ID 1492795191-31298-7-git-send-email-s.nawrocki@samsung.com (mailing list archive)
State Not Applicable
Headers show

Commit Message

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: Sylwester Nawrocki <s.nawrocki@samsung.com>
---
 sound/soc/samsung/Kconfig  |   8 ++
 sound/soc/samsung/Makefile |   2 +
 sound/soc/samsung/odroid.c | 219 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 229 insertions(+)
 create mode 100644 sound/soc/samsung/odroid.c
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Patch

diff --git a/sound/soc/samsung/Kconfig b/sound/soc/samsung/Kconfig
index f1f1d79..0520f5a 100644
--- a/sound/soc/samsung/Kconfig
+++ b/sound/soc/samsung/Kconfig
@@ -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
diff --git a/sound/soc/samsung/Makefile b/sound/soc/samsung/Makefile
index b5df5e2e..b6c2ee3 100644
--- a/sound/soc/samsung/Makefile
+++ b/sound/soc/samsung/Makefile
@@ -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
diff --git a/sound/soc/samsung/odroid.c b/sound/soc/samsung/odroid.c
new file mode 100644
index 0000000..0c0b00e
--- /dev/null
+++ b/sound/soc/samsung/odroid.c
@@ -0,0 +1,219 @@ 
+/*
+ * 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");