ASoC: samsung: add machine driver for odroidx2

This machine driver primary define the audio path,the supported data format and
sample frequency.

Change-Id: I2cdb5f6f65b67d0039f234930210f75c1be9fe38
Signed-off-by: Chen Zhen <zhen1.chen@samsung.com>

3 files changed, 189 insertions, 0 deletions

diff --git a/sound/soc/samsung/Kconfig b/sound/soc/samsung/Kconfig
index fe8819ba7a4..8bbd79490b8 100644
--- a/sound/soc/samsung/Kconfig
+++ b/sound/soc/samsung/Kconfig
@@ -240,3 +240,11 @@ config SND_SOC_SAMSUNG_EXYNOS4_WM1811
 	select SND_SAMSUNG_I2S
 	help
 	  Say Y if you want to add support for SoC audio on the Tizen Exynos4 board.
+
+config SND_SOC_ODROIDX2
+	tristate "Audio support for Odroidx2"
+	depends on SND_SOC_SAMSUNG
+	select SND_SOC_MAX98090
+	select SND_SAMSUNG_I2S
+	help
+	  Say Y here to enable audio support for the Odroidx2.
diff --git a/sound/soc/samsung/Makefile b/sound/soc/samsung/Makefile
index 1e212e4f723..8a675f18d98 100644
--- a/sound/soc/samsung/Makefile
+++ b/sound/soc/samsung/Makefile
@@ -45,6 +45,7 @@ snd-soc-lowland-objs := lowland.o
 snd-soc-littlemill-objs := littlemill.o
 snd-soc-bells-objs := bells.o
 snd-soc-exynos4-wm1811-objs := exynos4_wm1811.o
+snd-soc-odroidx2-max98090-objs := odroidx2_max98090.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
@@ -71,3 +72,4 @@ 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_SAMSUNG_EXYNOS4_WM1811) += snd-soc-exynos4-wm1811.o
+obj-$(CONFIG_SND_SOC_ODROIDX2) += snd-soc-odroidx2-max98090.o
diff --git a/sound/soc/samsung/odroidx2_max98090.c b/sound/soc/samsung/odroidx2_max98090.c
new file mode 100644
index 00000000000..50bf81fb6ed
--- /dev/null
+++ b/sound/soc/samsung/odroidx2_max98090.c
@@ -0,0 +1,179 @@
+/*
+ * Copyright (C) 2014 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 <sound/soc.h>
+#include <sound/pcm_params.h>
+#include "i2s.h"
+
+static int odroidx2_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 snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	int bfs, rfs, ret;
+	unsigned long rclk;
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_U24:
+	case SNDRV_PCM_FORMAT_S24:
+		bfs = 48;
+		break;
+	case SNDRV_PCM_FORMAT_U16_LE:
+	case SNDRV_PCM_FORMAT_S16_LE:
+		bfs = 32;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (params_rate(params)) {
+	case 16000:
+	case 22050:
+	case 24000:
+	case 32000:
+	case 44100:
+	case 48000:
+	case 88200:
+	case 96000:
+		if (bfs == 48)
+			rfs = 384;
+		else
+			rfs = 256;
+		break;
+	case 64000:
+		rfs = 384;
+		break;
+	case 8000:
+	case 11025:
+	case 12000:
+		if (bfs == 48)
+			rfs = 768;
+		else
+			rfs = 512;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	rclk = params_rate(params) * rfs;
+
+	ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S
+					| SND_SOC_DAIFMT_NB_NF
+					| SND_SOC_DAIFMT_CBS_CFS);
+	if (ret < 0)
+		return ret;
+
+	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
+					| SND_SOC_DAIFMT_NB_NF
+					| SND_SOC_DAIFMT_CBS_CFS);
+	if (ret < 0)
+		return ret;
+
+	ret = snd_soc_dai_set_sysclk(codec_dai, 0, rclk, SND_SOC_CLOCK_IN);
+	if (ret < 0)
+		return ret;
+
+	ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK,
+					0, SND_SOC_CLOCK_OUT);
+	if (ret < 0)
+		return ret;
+
+	ret = snd_soc_dai_set_clkdiv(cpu_dai, SAMSUNG_I2S_DIV_BCLK, bfs);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static struct snd_soc_ops odroidx2_ops = {
+	.hw_params = odroidx2_hw_params,
+};
+
+static struct snd_soc_dai_link odroidx2_dai[] = {
+	{
+		.name = "MAX98090",
+		.stream_name = "MAX98090 PCM",
+		.codec_dai_name = "HiFi",
+		.ops = &odroidx2_ops,
+	},
+};
+
+static struct snd_soc_card odroidx2 = {
+	.name = "odroidx2",
+	.owner = THIS_MODULE,
+	.dai_link = odroidx2_dai,
+	.num_links = ARRAY_SIZE(odroidx2_dai),
+};
+
+static int odroidx2_audio_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct snd_soc_card *card = &odroidx2;
+
+	if (!np)
+		return -ENODEV;
+
+	card->dev = &pdev->dev;
+
+	odroidx2_dai[0].codec_name = NULL;
+	odroidx2_dai[0].codec_of_node = of_parse_phandle(np,
+						"samsung,audio-codec", 0);
+	if (!odroidx2_dai[0].codec_of_node) {
+		dev_err(&pdev->dev,
+			"Property 'samsung,audio-codec' missing or invalid\n");
+		return -EINVAL;
+	}
+
+	odroidx2_dai[0].cpu_name = NULL;
+	odroidx2_dai[0].cpu_of_node = of_parse_phandle(np,
+						"samsung,i2s-controller", 0);
+	if (!odroidx2_dai[0].cpu_of_node) {
+		dev_err(&pdev->dev,
+			"Property 'samsung,i2s-controller' missing or invalid\n");
+		return -EINVAL;
+	}
+
+	odroidx2_dai[0].platform_of_node = odroidx2_dai[0].cpu_of_node;
+
+	return snd_soc_register_card(card);
+}
+
+static int odroidx2_audio_remove(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+	snd_soc_unregister_card(card);
+
+	return 0;
+}
+
+static const struct of_device_id odroidx2_audio_of_match[] = {
+	{ .compatible = "samsung,odroidx2-audio", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, odroid_audio_of_match);
+
+static struct platform_driver odroidx2_audio_driver = {
+	.driver = {
+		.name = "odroidx2-audio",
+		.owner = THIS_MODULE,
+		.of_match_table = odroidx2_audio_of_match,
+	},
+	.probe = odroidx2_audio_probe,
+	.remove = odroidx2_audio_remove,
+};
+
+module_platform_driver(odroidx2_audio_driver);
+
+MODULE_AUTHOR("zhen1.chen@samsung.com");
+MODULE_DESCRIPTION("ALSA SoC Odroidx2 Audio Support");
+MODULE_LICENSE("GPL v2");