[alsa-devel] [RFC PATCH 4/4] ASoC: mediatek: Add mt2701-cs42448 driver and config option.

[Garlic Tseng <garlic.tseng@mediatek.com>]

Add machine driver and config option for MT2701.

Signed-off-by: Garlic Tseng <garlic.tseng@mediatek.com>
---
 sound/soc/mediatek/Kconfig                 |  21 ++
 sound/soc/mediatek/Makefile                |   3 +
 sound/soc/mediatek/mt2701/Makefile         |  20 ++
 sound/soc/mediatek/mt2701/mt2701-cs42448.c | 376 +++++++++++++++++++++++++++++
 4 files changed, 420 insertions(+)
 create mode 100644 sound/soc/mediatek/mt2701/Makefile
 create mode 100644 sound/soc/mediatek/mt2701/mt2701-cs42448.c

diff --git a/sound/soc/mediatek/Kconfig b/sound/soc/mediatek/Kconfig
index f7e789e..b190322 100644
--- a/sound/soc/mediatek/Kconfig
+++ b/sound/soc/mediatek/Kconfig
@@ -48,3 +48,24 @@ config SND_SOC_MT8173_RT5650_RT5676
 	  with the RT5650 and RT5676 codecs.
 	  Select Y if you have such device.
 	  If unsure select "N".
+
+config SND_SOC_MT2701
+	bool "SND_SOC_MT2701"
+	depends on SND_SOC_MEDIATEK
+	select SND_SOC_CS42XX8_I2C
+	help
+	  This adds ASoC driver for Mediatek MT2701 boards
+	  with the CS42448 codecs.
+	  Select Y if you have such device.
+	  If unsure select "N".
+
+config SND_SOC_MT2701_CS42448
+	bool "SND_SOC_MT2701_CS42448"
+	depends on SND_SOC_MT2701
+	select SND_SOC_CS42XX8_I2C
+	help
+	  This adds ASoC driver for Mediatek MT2701 boards
+	  with the CS42448 codecs.
+	  Select Y if you have such device.
+	  If unsure select "N".
+
diff --git a/sound/soc/mediatek/Makefile b/sound/soc/mediatek/Makefile
index 5048165..60387ca 100644
--- a/sound/soc/mediatek/Makefile
+++ b/sound/soc/mediatek/Makefile
@@ -3,3 +3,6 @@ obj-$(CONFIG_SND_SOC_MT8173_MAX98090) += mt8173/
 obj-$(CONFIG_SND_SOC_MT8173_RT5650_RT5676) += mt8173/
 obj-$(CONFIG_SND_SOC_MT8173_RT5650_RT5514) += mt8173/
 obj-$(CONFIG_SND_SOC_MT8173_RT5650) += mt8173/
+
+# 2701 Machine support
+obj-$(CONFIG_SND_SOC_MT2701_CS42448) += mt2701/
diff --git a/sound/soc/mediatek/mt2701/Makefile b/sound/soc/mediatek/mt2701/Makefile
new file mode 100644
index 0000000..9f27653
--- /dev/null
+++ b/sound/soc/mediatek/mt2701/Makefile
@@ -0,0 +1,20 @@
+#
+# Copyright (C) 2015 MediaTek Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+
+# platform driver
+obj-$(CONFIG_SND_SOC_MT2701) += mtk2701-afe-pcm.o
+obj-$(CONFIG_SND_SOC_MT2701) += mtk2701-irq.o
+obj-$(CONFIG_SND_SOC_MT2701) += mtk2701-afe-clock-ctrl.o
+
+# machine driver
+obj-$(CONFIG_SND_SOC_MT2701_CS42448) += mt2701-cs42448.o
diff --git a/sound/soc/mediatek/mt2701/mt2701-cs42448.c b/sound/soc/mediatek/mt2701/mt2701-cs42448.c
new file mode 100644
index 0000000..426f677
--- /dev/null
+++ b/sound/soc/mediatek/mt2701/mt2701-cs42448.c
@@ -0,0 +1,376 @@
+/*
+ * mt2701-cs42448.c  --  MT2701 CS42448 ALSA SoC machine driver
+ *
+ * Copyright (c) 2016 MediaTek Inc.
+ * Author: Ir Lian <ir.lian@mediatek.com>
+ *              Garlic Tseng <garlic.tseng@mediatek.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 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <sound/soc.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/of_gpio.h>
+
+#include "mtk2701-afe-common.h"
+
+struct mt2701_cs42448_private {
+	int i2s1_in_mux;
+	int i2s1_in_mux_gpio_sel_1;
+	int i2s1_in_mux_gpio_sel_2;
+};
+
+static const char * const i2sin_mux_switch_text[] = {
+	"ADC_SDOUT2",
+	"ADC_SDOUT3",
+	"I2S_IN_1",
+	"I2S_IN_2",
+};
+
+static const struct soc_enum i2sin_mux_enum =
+	SOC_ENUM_SINGLE_EXT(4, i2sin_mux_switch_text);
+
+static int mt2701_cs42448_i2sin1_mux_get(struct snd_kcontrol *kcontrol,
+					 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
+	struct mt2701_cs42448_private *priv = snd_soc_card_get_drvdata(card);
+
+	ucontrol->value.integer.value[0] = priv->i2s1_in_mux;
+	return 0;
+}
+
+static int mt2701_cs42448_i2sin1_mux_set(struct snd_kcontrol *kcontrol,
+					 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
+	struct mt2701_cs42448_private *priv = snd_soc_card_get_drvdata(card);
+
+	if (ucontrol->value.integer.value[0] == priv->i2s1_in_mux)
+		return 0;
+
+	switch (ucontrol->value.integer.value[0]) {
+	case 0:
+		gpio_set_value(priv->i2s1_in_mux_gpio_sel_1, 0);
+		gpio_set_value(priv->i2s1_in_mux_gpio_sel_2, 0);
+		break;
+	case 1:
+		gpio_set_value(priv->i2s1_in_mux_gpio_sel_1, 1);
+		gpio_set_value(priv->i2s1_in_mux_gpio_sel_2, 0);
+		break;
+	case 2:
+		gpio_set_value(priv->i2s1_in_mux_gpio_sel_1, 0);
+		gpio_set_value(priv->i2s1_in_mux_gpio_sel_2, 1);
+		break;
+	case 3:
+		gpio_set_value(priv->i2s1_in_mux_gpio_sel_1, 1);
+		gpio_set_value(priv->i2s1_in_mux_gpio_sel_2, 1);
+		break;
+	default:
+		dev_warn(card->dev, "%s invalid setting\n", __func__);
+	}
+
+	priv->i2s1_in_mux = ucontrol->value.integer.value[0];
+	return 0;
+}
+
+static const struct snd_soc_dapm_widget
+			mt2701_cs42448_asoc_card_dapm_widgets[] = {
+	SND_SOC_DAPM_LINE("Line Out Jack", NULL),
+	SND_SOC_DAPM_MIC("AMIC", NULL),
+	SND_SOC_DAPM_LINE("Tuner In", NULL),
+	SND_SOC_DAPM_LINE("Satellite Tuner In", NULL),
+	SND_SOC_DAPM_LINE("AUX In", NULL),
+};
+
+static const struct snd_kcontrol_new mt2701_cs42448_controls[] = {
+	SOC_DAPM_PIN_SWITCH("Line Out Jack"),
+	SOC_DAPM_PIN_SWITCH("AMIC"),
+	SOC_DAPM_PIN_SWITCH("Tuner In"),
+	SOC_DAPM_PIN_SWITCH("Satellite Tuner In"),
+	SOC_DAPM_PIN_SWITCH("AUX In"),
+	SOC_ENUM_EXT("I2SIN1_MUX_Switch", i2sin_mux_enum,
+		     mt2701_cs42448_i2sin1_mux_get,
+		     mt2701_cs42448_i2sin1_mux_set),
+};
+
+static const unsigned int mt2701_cs42448_sampling_rates[] = {48000};
+
+static struct snd_pcm_hw_constraint_list mt2701_cs42448_constraints_rates = {
+		.count = ARRAY_SIZE(mt2701_cs42448_sampling_rates),
+		.list = mt2701_cs42448_sampling_rates,
+		.mask = 0,
+};
+
+static int mt2701_cs42448_fe_ops_startup(struct snd_pcm_substream *substream)
+{
+	int err;
+
+	err = snd_pcm_hw_constraint_list(substream->runtime, 0,
+					 SNDRV_PCM_HW_PARAM_RATE,
+					 &mt2701_cs42448_constraints_rates);
+	if (err < 0) {
+		dev_err(substream->pcm->card->dev, /*better way to get device?*/
+			"%s snd_pcm_hw_constraint_list failed: 0x%x\n",
+			__func__, err);
+		return err;
+	}
+	return 0;
+}
+
+static struct snd_soc_ops mt2701_cs42448_fe_ops = {
+	.startup = mt2701_cs42448_fe_ops_startup,
+};
+
+static int mt2701_cs42448_be_ops_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;
+	/* codec slave, mt2701 master */
+	unsigned int fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
+			    | SND_SOC_DAIFMT_CONT;
+	unsigned int mclk_rate;
+	unsigned int rate = params_rate(params);
+	unsigned int div_mclk_to_bck = rate > 192000 ? 2 : 4;
+	unsigned int div_bck_to_lrck = 64;
+
+	mclk_rate = rate * div_bck_to_lrck * div_mclk_to_bck;
+
+	/* mt2701 mclk */
+	snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate, SND_SOC_CLOCK_OUT);
+	/* mt2701 bck */
+	snd_soc_dai_set_clkdiv(cpu_dai, DIV_ID_MCLK_TO_BCK, div_mclk_to_bck);
+	/* mt2701 lrck */
+	snd_soc_dai_set_clkdiv(cpu_dai, DIV_ID_BCK_TO_LRCK, div_bck_to_lrck);
+	/* mt2701 master */
+	snd_soc_dai_set_fmt(cpu_dai, fmt);
+
+	/* codec mclk */
+	snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate, SND_SOC_CLOCK_IN);
+	/* codec slave */
+	snd_soc_dai_set_fmt(codec_dai, fmt);
+	return 0;
+}
+
+static struct snd_soc_ops mt2701_cs42448_be_ops = {
+	.hw_params = mt2701_cs42448_be_ops_hw_params
+};
+
+static struct snd_soc_dai_link mt2701_cs42448_dai_links[] = {
+	/*FE*/
+	{
+		.name = "mt2701-cs42448-pcm0",
+		.stream_name = "mt2701-cs42448-pcm0",
+		.cpu_dai_name = "PCM0",
+		.codec_name = "snd-soc-dummy",
+		.codec_dai_name = "snd-soc-dummy-dai",
+		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
+			 | SND_SOC_DAIFMT_GATED,
+		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
+			    SND_SOC_DPCM_TRIGGER_POST},
+		.ops = &mt2701_cs42448_fe_ops,
+		.dynamic = 1,
+		.dpcm_playback = 1,
+		.dpcm_capture = 1,
+	},
+	{
+		.name = "mt2701-cs42448-multi-ch-out",
+		.stream_name = "mt2701-cs42448-multi-ch-out",
+		.cpu_dai_name = "PCM_multi",
+		.codec_name = "snd-soc-dummy",
+		.codec_dai_name = "snd-soc-dummy-dai",
+		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
+			 | SND_SOC_DAIFMT_GATED,
+		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
+			    SND_SOC_DPCM_TRIGGER_POST},
+		.ops = &mt2701_cs42448_fe_ops,
+		.dynamic = 1,
+		.dpcm_playback = 1,
+	},
+	{
+		.name = "mt2701-cs42448-pcm1-data-UL",
+		.stream_name = "mt2701-cs42448-pcm1-data-UL",
+		.cpu_dai_name = "PCM1",
+		.codec_name = "snd-soc-dummy",
+		.codec_dai_name = "snd-soc-dummy-dai",
+		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
+			 | SND_SOC_DAIFMT_GATED,
+		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
+			    SND_SOC_DPCM_TRIGGER_POST},
+		.ops = &mt2701_cs42448_fe_ops,
+		.dynamic = 1,
+		.dpcm_capture = 1,
+	},
+	/*BE*/
+	{
+		.name = "mt2701-cs42448-I2S0",
+		.cpu_dai_name = "I2S0",
+		.no_pcm = 1,
+		.codec_dai_name = "cs42448",
+		.codec_name = "cs42xx8.2-0048",
+		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
+			 | SND_SOC_DAIFMT_GATED,
+		.ops = &mt2701_cs42448_be_ops,
+		.dpcm_playback = 1,
+		.dpcm_capture = 1,
+	},
+	{
+		.name = "mt2701-cs42448-I2S1",
+		.cpu_dai_name = "I2S1",
+		.no_pcm = 1,
+		.codec_dai_name = "cs42448",
+		.codec_name = "cs42xx8.2-0048",
+		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
+			 | SND_SOC_DAIFMT_GATED,
+		.ops = &mt2701_cs42448_be_ops,
+		.dpcm_playback = 1,
+		.dpcm_capture = 1,
+	},
+	{
+		.name = "mt2701-cs42448-I2S2",
+		.cpu_dai_name = "I2S2",
+		.no_pcm = 1,
+		.codec_dai_name = "cs42448",
+		.codec_name = "cs42xx8.2-0048",
+		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
+			 | SND_SOC_DAIFMT_GATED,
+		.ops = &mt2701_cs42448_be_ops,
+		.dpcm_playback = 1,
+		.dpcm_capture = 1,
+	},
+	{
+		.name = "mt2701-cs42448-I2S3",
+		.cpu_dai_name = "I2S3",
+		.no_pcm = 1,
+		.codec_dai_name = "cs42448",
+		.codec_name = "cs42xx8.2-0048",
+		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
+			 | SND_SOC_DAIFMT_GATED,
+		.ops = &mt2701_cs42448_be_ops,
+		.dpcm_playback = 1,
+		.dpcm_capture = 1,
+	},
+};
+
+static struct snd_soc_card mt2701_cs42448_soc_card = {
+	.name = "mt2701-cs42448",
+	.dai_link = mt2701_cs42448_dai_links,
+	.num_links = ARRAY_SIZE(mt2701_cs42448_dai_links),
+	.controls = mt2701_cs42448_controls,
+	.num_controls = ARRAY_SIZE(mt2701_cs42448_controls),
+	.dapm_widgets = mt2701_cs42448_asoc_card_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(mt2701_cs42448_asoc_card_dapm_widgets),
+};
+
+static int mt2701_cs42448_machine_probe(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = &mt2701_cs42448_soc_card;
+	int ret;
+	int i;
+	struct device_node *platform_node;
+	struct mt2701_cs42448_private *priv =
+		devm_kzalloc(&pdev->dev, sizeof(struct mt2701_cs42448_private),
+			     GFP_KERNEL);
+	struct device *dev = &pdev->dev;
+
+	if (!priv)
+		return -ENOMEM;
+
+	platform_node = of_parse_phandle(pdev->dev.of_node,
+					 "mediatek,platform", 0);
+	if (!platform_node) {
+		dev_err(&pdev->dev, "Property 'platform' missing or invalid\n");
+		return -EINVAL;
+	}
+	for (i = 0; i < card->num_links; i++) {
+		if (mt2701_cs42448_dai_links[i].platform_name)
+			continue;
+		mt2701_cs42448_dai_links[i].platform_of_node = platform_node;
+	}
+
+	card->dev = dev;
+
+	ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
+	if (ret) {
+		dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
+		return ret;
+	}
+
+	priv->i2s1_in_mux_gpio_sel_1 =
+		of_get_named_gpio(dev->of_node, "i2s1-in-sel-gpio1", 0);
+	if (gpio_is_valid(priv->i2s1_in_mux_gpio_sel_1)) {
+		ret = devm_gpio_request(dev, priv->i2s1_in_mux_gpio_sel_1,
+					"i2s1_in_mux_gpio_sel_1");
+		if (ret)
+			dev_warn(&pdev->dev, "%s devm_gpio_request fail %d\n",
+				 __func__, ret);
+		gpio_direction_output(priv->i2s1_in_mux_gpio_sel_1, 0);
+	}
+
+	priv->i2s1_in_mux_gpio_sel_2 =
+		of_get_named_gpio(dev->of_node, "i2s1-in-sel-gpio2", 0);
+	if (gpio_is_valid(priv->i2s1_in_mux_gpio_sel_2)) {
+		ret = devm_gpio_request(dev, priv->i2s1_in_mux_gpio_sel_2,
+					"i2s1_in_mux_gpio_sel_2");
+		if (ret)
+			dev_warn(&pdev->dev, "%s devm_gpio_request fail2 %d\n",
+				 __func__, ret);
+		gpio_direction_output(priv->i2s1_in_mux_gpio_sel_2, 0);
+	}
+	snd_soc_card_set_drvdata(card, priv);
+
+	ret = snd_soc_register_card(card);
+
+	if (ret)
+		dev_err(&pdev->dev, "%s snd_soc_register_card fail %d\n",
+			__func__, ret);
+	return ret;
+}
+
+static int mt2701_cs42448_machine_remove(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+	devm_kfree(&pdev->dev, snd_soc_card_get_drvdata(card));
+	return snd_soc_unregister_card(card);
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id mt2701_cs42448_machine_dt_match[] = {
+	{.compatible = "mediatek,mt2701-cs42448-machine",},
+	{}
+};
+#endif
+
+static struct platform_driver mt2701_cs42448_machine = {
+	.driver = {
+		.name = "mt2701-cs42448",
+		.owner = THIS_MODULE,
+		   #ifdef CONFIG_OF
+		   .of_match_table = mt2701_cs42448_machine_dt_match,
+		   #endif
+	},
+	.probe = mt2701_cs42448_machine_probe,
+	.remove = mt2701_cs42448_machine_remove
+};
+
+module_platform_driver(mt2701_cs42448_machine);
+
+/* Module information */
+MODULE_DESCRIPTION("MT2701 CS42448 ALSA SoC machine driver");
+MODULE_AUTHOR("Ir Lian <ir.lian@mediatek.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("mt2701 cs42448 soc card");
-- 
1.9.1