[alsa-devel] [PATCH 1/3] ASoC: samsung: Add machine driver for Trats2

[Inha Song]

This patch add the sound machine driver for Trats2 board.
The codec operate in master mode. So, Reference to the
codec master clock must be defined in DT.

Signed-off-by: Inha Song <ideal.song@xxxxxxxxxxx>
---
 sound/soc/samsung/Kconfig         |   8 ++
 sound/soc/samsung/Makefile        |   2 +
 sound/soc/samsung/trats2_wm1811.c | 216 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 226 insertions(+)
 create mode 100644 sound/soc/samsung/trats2_wm1811.c

diff --git a/sound/soc/samsung/Kconfig b/sound/soc/samsung/Kconfig
index fc67f97..8031423 100644
--- a/sound/soc/samsung/Kconfig
+++ b/sound/soc/samsung/Kconfig
@@ -245,3 +245,11 @@ config SND_SOC_ARNDALE_RT5631_ALC5631
         depends on SND_SOC_SAMSUNG
         select SND_SAMSUNG_I2S
         select SND_SOC_RT5631
+
+config SND_SOC_SAMSUNG_TRATS2_WM1811
+	tristate "SoC I2S Audio support for WM1811 on Tizen Trats2 board"
+	depends on SND_SOC_SAMSUNG
+	select SND_SOC_WM8994
+	select SND_SAMSUNG_I2S
+	help
+	  Say Y if you want to add support for SoC audio on the Tizen Trats2 board.
diff --git a/sound/soc/samsung/Makefile b/sound/soc/samsung/Makefile
index 31e3dba..e2b7b1b 100644
--- a/sound/soc/samsung/Makefile
+++ b/sound/soc/samsung/Makefile
@@ -46,6 +46,7 @@ snd-soc-littlemill-objs := littlemill.o
 snd-soc-bells-objs := bells.o
 snd-soc-odroidx2-max98090-objs := odroidx2_max98090.o
 snd-soc-arndale-rt5631-objs := arndale_rt5631.o
+snd-soc-trats2-wm1811-objs := trats2_wm1811.o
 
 obj-$(CONFIG_SND_SOC_SAMSUNG_JIVE_WM8750) += snd-soc-jive-wm8750.o
 obj-$(CONFIG_SND_SOC_SAMSUNG_NEO1973_WM8753) += snd-soc-neo1973-wm8753.o
@@ -73,3 +74,4 @@ obj-$(CONFIG_SND_SOC_LITTLEMILL) += snd-soc-littlemill.o
 obj-$(CONFIG_SND_SOC_BELLS) += snd-soc-bells.o
 obj-$(CONFIG_SND_SOC_ODROIDX2) += snd-soc-odroidx2-max98090.o
 obj-$(CONFIG_SND_SOC_ARNDALE_RT5631_ALC5631) += snd-soc-arndale-rt5631.o
+obj-$(CONFIG_SND_SOC_SAMSUNG_TRATS2_WM1811) += snd-soc-trats2-wm1811.o
diff --git a/sound/soc/samsung/trats2_wm1811.c b/sound/soc/samsung/trats2_wm1811.c
new file mode 100644
index 0000000..fc96842
--- /dev/null
+++ b/sound/soc/samsung/trats2_wm1811.c
@@ -0,0 +1,216 @@
+/*
+ * Copyright (C) 2015 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 as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/of.h>
+#include <linux/module.h>
+#include <linux/clk.h>
+#include <sound/soc.h>
+#include <sound/pcm_params.h>
+#include "i2s.h"
+#include "i2s-regs.h"
+#include "../codecs/wm8994.h"
+
+struct trats2_machine_priv {
+	struct clk *clk_mclk;
+};
+
+static struct trats2_machine_priv trats2_wm1811_priv;
+
+static const struct snd_kcontrol_new trats2_controls[] = {
+	SOC_DAPM_PIN_SWITCH("SPK"),
+};
+
+const struct snd_soc_dapm_widget trats2_dapm_widgets[] = {
+	SND_SOC_DAPM_SPK("SPK", NULL),
+};
+
+static int trats2_aif1_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 *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_dai *codec_dai = rtd->codec_dai;
+	struct trats2_machine_priv *priv = snd_soc_card_get_drvdata(rtd->card);
+	unsigned int sysclk_rate;
+	unsigned int mclk_rate =
+			(unsigned int)clk_get_rate(priv->clk_mclk);
+	int ret;
+
+	/* Set the codec DAI configuration to Master*/
+	ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S
+					| SND_SOC_DAIFMT_NB_NF
+					| SND_SOC_DAIFMT_CBM_CFM);
+	if (ret < 0) {
+		dev_err(codec_dai->dev,
+			"Failed to set codec dai format: %d\n", ret);
+		return ret;
+	}
+
+	/* Set the cpu DAI configuration to Slave */
+	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
+					| SND_SOC_DAIFMT_NB_NF
+					| SND_SOC_DAIFMT_CBM_CFM);
+	if (ret < 0) {
+		dev_err(cpu_dai->dev,
+			"Failed to set cpu dai format: %d\n", ret);
+		return ret;
+	}
+
+	/* SYSCLK must be greater than 4.096MHz */
+	if (params_rate(params) == 8000 || params_rate(params) == 11025)
+		sysclk_rate = params_rate(params) * 512;
+	else
+		sysclk_rate = params_rate(params) * 256;
+
+	/* Set the codec FLL1 */
+	ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1,
+				  mclk_rate, sysclk_rate);
+	if (ret < 0) {
+		dev_err(codec_dai->dev, "Failed to set FLL1: %d\n", ret);
+		return ret;
+	}
+
+	/* Set the codec SYSCLK */
+	ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1,
+				     sysclk_rate, SND_SOC_CLOCK_IN);
+	if (ret < 0) {
+		dev_err(codec_dai->dev, "Failed to set SYSCLK: %d\n", ret);
+		return ret;
+	}
+
+	/* Set i2s OPCLK */
+	ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_OPCLK,
+				     0, MOD_OPCLK_PCLK);
+	if (ret < 0) {
+		dev_err(cpu_dai->dev,
+			"Failed to set i2s opclk: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static struct snd_soc_ops trats2_aif1_ops = {
+	.hw_params = trats2_aif1_hw_params,
+};
+
+static int trats2_init_paiftx(struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_codec *codec = rtd->codec;
+	struct snd_soc_card *card = rtd->card;
+	struct trats2_machine_priv *priv = snd_soc_card_get_drvdata(card);
+	int ret;
+
+	ret = clk_prepare_enable(priv->clk_mclk);
+	if (ret) {
+		dev_err(codec->dev, "Failed to enable mclk: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static struct snd_soc_dai_link trats2_dai[] = {
+	{
+		.name = "WM1811 AIF1",
+		.stream_name = "Pri_Dai",
+		.codec_dai_name = "wm8994-aif1",
+		.codec_name = "wm8994-codec",
+		.init = trats2_init_paiftx,
+		.ops = &trats2_aif1_ops,
+	},
+};
+
+static struct snd_soc_card trats2_card = {
+	.owner			= THIS_MODULE,
+
+	.dai_link		= trats2_dai,
+	.num_links		= ARRAY_SIZE(trats2_dai),
+
+	.controls		= trats2_controls,
+	.num_controls		= ARRAY_SIZE(trats2_controls),
+	.dapm_widgets		= trats2_dapm_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(trats2_dapm_widgets),
+
+	.drvdata		= &trats2_wm1811_priv,
+};
+
+static int trats2_audio_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct snd_soc_card *card = &trats2_card;
+	struct snd_soc_dai_link *dai_link = card->dai_link;
+	struct trats2_machine_priv *priv = card->drvdata;
+	int ret;
+
+	if (!np) {
+		dev_err(&pdev->dev, "of node is missing.\n");
+		return -ENODEV;
+	}
+
+	card->dev = &pdev->dev;
+
+	ret = snd_soc_of_parse_card_name(card, "samsung,model");
+	if (ret) {
+		dev_err(&pdev->dev,
+			"Card name is not provided\n");
+		return ret;
+	}
+
+	ret = snd_soc_of_parse_audio_routing(card, "samsung,audio-routing");
+	if (ret) {
+		dev_err(&pdev->dev, "Audio routing is not provided\n");
+		return ret;
+	}
+
+	dai_link->cpu_of_node = of_parse_phandle(np,
+						 "samsung,i2s-controller", 0);
+	if (dai_link->cpu_of_node == NULL) {
+		dev_err(&pdev->dev, "i2s-controller property parse error\n");
+		return -EINVAL;
+	}
+
+	dai_link->platform_of_node = dai_link->cpu_of_node;
+
+	priv->clk_mclk =  devm_clk_get(&pdev->dev, "mclk");
+	if (IS_ERR(priv->clk_mclk)) {
+		dev_err(&pdev->dev, "Failed to get mclk clock\n");
+		return PTR_ERR(priv->clk_mclk);
+	}
+
+	ret = devm_snd_soc_register_card(&pdev->dev, card);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to register card: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static const struct of_device_id trats2_audio_of_match[] = {
+	{ .compatible	= "samsung,trats2-audio", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, trats2_audio_of_match);
+
+static struct platform_driver trats2_audio_driver = {
+	.driver = {
+		.name		= "trats2-audio",
+		.owner		= THIS_MODULE,
+		.pm		= &snd_soc_pm_ops,
+		.of_match_table	= trats2_audio_of_match,
+	},
+	.probe	= trats2_audio_probe,
+};
+
+module_platform_driver(trats2_audio_driver);
+
+MODULE_AUTHOR("Inha Song <ideal.song@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("ALSA SoC Trats2 Audio Support");
+MODULE_LICENSE("GPL v2");
-- 
2.0.0.390.gcb682f8

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