MLK-10224-2 ASoC: imx-wm8958: add wm8958 machine driver for i.MX7d-12x12-arm2 board

Add wm8959 machine driver for i.MX7d-12x12-arm2 board.

Signed-off-by: Zidan Wang <zidan.wang@freescale.com>

3 files changed, 483 insertions, 0 deletions

diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
index 573dabbf87d2..5b5b245d6534 100644
--- a/sound/soc/fsl/Kconfig
+++ b/sound/soc/fsl/Kconfig
@@ -252,6 +252,20 @@ config SND_SOC_IMX_CS42888
 	 Say Y if you want to add support for SoC audio on an i.MX board with
 	 a cs42888 codec.
 
+config SND_SOC_IMX_WM8958
+	tristate "SoC Audio support for i.MX boards with wm8958"
+	depends on OF && I2C
+	select MFD_WM8994
+	select SND_SOC_WM8994
+	select SND_SOC_IMX_PCM_DMA
+	select SND_SOC_FSL_SAI
+	select SND_SOC_FSL_UTILS
+	select SND_KCTL_JACK
+	help
+	 SoC Audio support for i.MX boards with WM8958
+	 Say Y if you want to add support for SoC audio on an i.MX board with
+	 a wm8958 codec.
+
 config SND_SOC_IMX_WM8962
 	tristate "SoC Audio support for i.MX boards with wm8962"
 	depends on OF && I2C
diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile
index 144cd69e180b..d0a90a1b5f74 100644
--- a/sound/soc/fsl/Makefile
+++ b/sound/soc/fsl/Makefile
@@ -55,6 +55,7 @@ snd-soc-mx27vis-aic32x4-objs := mx27vis-aic32x4.o
 snd-soc-wm1133-ev1-objs := wm1133-ev1.o
 snd-soc-imx-cs42888-objs := imx-cs42888.o
 snd-soc-imx-sgtl5000-objs := imx-sgtl5000.o
+snd-soc-imx-wm8958-objs := imx-wm8958.o
 snd-soc-imx-wm8962-objs := imx-wm8962.o
 snd-soc-imx-spdif-objs := imx-spdif.o
 snd-soc-imx-mc13783-objs := imx-mc13783.o
@@ -69,6 +70,7 @@ obj-$(CONFIG_SND_MXC_SOC_WM1133_EV1) += snd-soc-wm1133-ev1.o
 obj-$(CONFIG_SND_SOC_IMX_CS42888) += snd-soc-imx-cs42888.o
 obj-$(CONFIG_SND_SOC_IMX_SGTL5000) += snd-soc-imx-sgtl5000.o
 obj-$(CONFIG_SND_SOC_IMX_WM8962) += snd-soc-imx-wm8962.o
+obj-${CONFIG_SND_SOC_IMX_WM8958} += snd-soc-imx-wm8958.o
 obj-$(CONFIG_SND_SOC_IMX_SPDIF) += snd-soc-imx-spdif.o
 obj-$(CONFIG_SND_SOC_IMX_MC13783) += snd-soc-imx-mc13783.o
 obj-$(CONFIG_SND_SOC_IMX_HDMI) += snd-soc-imx-hdmi.o
diff --git a/sound/soc/fsl/imx-wm8958.c b/sound/soc/fsl/imx-wm8958.c
new file mode 100644
index 000000000000..3cc317b8c680
--- /dev/null
+++ b/sound/soc/fsl/imx-wm8958.c
@@ -0,0 +1,467 @@
+/*
+ * Copyright (C) 2015 Freescale Semiconductor, Inc.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/i2c.h>
+#include <linux/of_gpio.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/clk.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+#include <sound/control.h>
+#include <sound/pcm_params.h>
+#include <sound/soc-dapm.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/mfd/wm8994/registers.h>
+#include "../fsl/fsl_sai.h"
+#include "../codecs/wm8994.h"
+
+#define DAI_NAME_SIZE	32
+
+struct imx_wm8958_data {
+	struct snd_soc_dai_link dai;
+	struct snd_soc_card card;
+	char codec_dai_name[DAI_NAME_SIZE];
+	char platform_name[DAI_NAME_SIZE];
+	struct clk *mclk;
+	unsigned int clk_frequency;
+	bool is_codec_master;
+	int sr_stream[2];
+};
+
+struct imx_priv {
+	int hp_gpio;
+	int hp_active_low;
+	struct snd_soc_codec *codec;
+	struct platform_device *pdev;
+	struct snd_kcontrol *headphone_kctl;
+	struct snd_card *snd_card;
+};
+
+static struct imx_priv card_priv;
+
+static struct snd_soc_jack imx_hp_jack;
+
+static struct snd_soc_jack_pin imx_hp_jack_pins[] = {
+	{
+		.pin = "Headphone Jack",
+		.mask = SND_JACK_HEADPHONE,
+	},
+};
+
+static struct snd_soc_jack_gpio imx_hp_jack_gpio = {
+	.name = "headphone detect",
+	.report = SND_JACK_HEADPHONE,
+	.debounce_time = 250,
+	.invert = 1,
+};
+
+static int hpjack_status_check(void)
+{
+	struct imx_priv *priv = &card_priv;
+	struct platform_device *pdev = priv->pdev;
+	char *envp[3], *buf;
+	int hp_status, ret;
+
+	if (!gpio_is_valid(priv->hp_gpio))
+		return 0;
+
+	hp_status = gpio_get_value(priv->hp_gpio) ? 1 : 0;
+	buf = kmalloc(32, GFP_ATOMIC);
+	if (!buf) {
+		dev_err(&pdev->dev, "%s kmalloc failed\n", __func__);
+		return -ENOMEM;
+	}
+
+	if (hp_status != priv->hp_active_low) {
+		snprintf(buf, 32, "STATE=%d", 2);
+		snd_soc_dapm_disable_pin(&priv->codec->dapm, "Ext Spk");
+		ret = imx_hp_jack_gpio.report;
+		snd_kctl_jack_report(priv->snd_card, priv->headphone_kctl, 1);
+	} else {
+		snprintf(buf, 32, "STATE=%d", 0);
+		snd_soc_dapm_enable_pin(&priv->codec->dapm, "Ext Spk");
+		ret = 0;
+		snd_kctl_jack_report(priv->snd_card, priv->headphone_kctl, 0);
+	}
+
+	envp[0] = "NAME=headphone";
+	envp[1] = buf;
+	envp[2] = NULL;
+	kobject_uevent_env(&pdev->dev.kobj, KOBJ_CHANGE, envp);
+	kfree(buf);
+
+	return ret;
+}
+
+static const struct snd_soc_dapm_widget imx_wm8958_dapm_widgets[] = {
+	SND_SOC_DAPM_HP("Headphone Jack", NULL),
+	SND_SOC_DAPM_SPK("Ext Spk", NULL),
+};
+
+static const struct snd_soc_dapm_route imx_wm8958_dapm_route[] = {
+	{"Headphone Jack", NULL, "HPOUT1L"},
+	{"Headphone Jack", NULL, "HPOUT1R"},
+	{"Ext Spk", NULL, "SPKOUTLP"},
+	{"Ext Spk", NULL, "SPKOUTLN"},
+	{"Ext Spk", NULL, "SPKOUTRP"},
+	{"Ext Spk", NULL, "SPKOUTRN"},
+};
+
+static int imx_hifi_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;
+	struct snd_soc_codec *codec = codec_dai->codec;
+	struct snd_soc_card *card = codec->card;
+	struct device *dev = card->dev;
+	struct imx_wm8958_data *data = snd_soc_card_get_drvdata(card);
+	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+	unsigned int pll_out;
+	int ret;
+
+	ret = snd_soc_dai_set_fmt(codec_dai, data->dai.dai_fmt);
+	if (ret) {
+		dev_err(dev, "failed to set codec dai fmt: %d\n", ret);
+		return ret;
+	}
+
+	ret = snd_soc_dai_set_fmt(cpu_dai, data->dai.dai_fmt);
+	if (ret) {
+		dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
+		return ret;
+	}
+
+	data->clk_frequency = clk_get_rate(data->mclk);
+
+	data->sr_stream[tx] = params_rate(params);
+
+	/*
+	 * If the sample rate of second stream is equal to the first stream,
+	 * just keep the setting and return.
+	 */
+	if (data->sr_stream[!tx] &&
+			data->sr_stream[tx] == data->sr_stream[!tx])
+		return 0;
+
+	if (!data->is_codec_master) {
+		ret = snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_OUT);
+		if (ret) {
+			dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
+			return ret;
+		}
+
+		ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_FLL_SRC_MCLK1,
+				data->clk_frequency, SND_SOC_CLOCK_IN);
+		if (ret) {
+			dev_err(dev, "failed to set codec sysclk: %d\n", ret);
+			return ret;
+		}
+	} else {
+		/*
+		 * Set pll helper function will not set FLL when FLL source,
+		 * FLL in and out frequency is not been changed. So for first
+		 * stream, we should enable FLL.
+		 */
+		if (data->sr_stream[!tx] == 0)
+			snd_soc_update_bits(codec, WM8994_FLL1_CONTROL_1, 1, 1);
+
+		pll_out = data->sr_stream[tx] * 256;
+
+		ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1,
+					  WM8994_FLL_SRC_MCLK1,
+					  data->clk_frequency,
+					  pll_out);
+		if (ret) {
+			dev_err(dev, "failed to set codec pll: %d\n", ret);
+			return ret;
+		}
+
+		ret = snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_IN);
+		if (ret) {
+			dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
+			return ret;
+		}
+
+		ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1,
+				pll_out, SND_SOC_CLOCK_OUT);
+		if (ret) {
+			dev_err(dev, "failed to set codec sysclk: %d\n", ret);
+			return ret;
+		}
+	}
+
+	/*
+	 * Set GPIO1 pin function to reserve, so that DAC1 and ADC1 using shared
+	 * LRCLK from DACLRCK1.
+	 */
+	snd_soc_update_bits(codec, WM8994_GPIO_1, 0x1f, 0x2);
+	return 0;
+}
+
+static int imx_hifi_hw_free(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_codec *codec = rtd->codec;
+	struct snd_soc_card *card = rtd->card;
+	struct imx_wm8958_data *data = snd_soc_card_get_drvdata(card);
+	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+
+	/*
+	 * Disable FLL1 after all stream finished.
+	 */
+	if (data->sr_stream[!tx] == 0 && data->sr_stream[tx])
+		snd_soc_update_bits(codec, WM8994_FLL1_CONTROL_1, 1, 0);
+
+	data->sr_stream[tx] = 0;
+
+	return 0;
+}
+
+static int imx_hifi_startup(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_card *card = rtd->card;
+	struct imx_wm8958_data *data = snd_soc_card_get_drvdata(card);
+	int ret;
+
+	if (!IS_ERR(data->mclk)) {
+		ret = clk_prepare_enable(data->mclk);
+		if (ret) {
+			dev_err(card->dev, "Failed to enable MCLK: %d\n", ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static void imx_hifi_shutdown(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_card *card = rtd->card;
+	struct imx_wm8958_data *data = snd_soc_card_get_drvdata(card);
+
+	if (!IS_ERR(data->mclk))
+		clk_disable_unprepare(data->mclk);
+}
+
+static struct snd_soc_ops imx_hifi_ops = {
+	.hw_params = imx_hifi_hw_params,
+	.hw_free   = imx_hifi_hw_free,
+	.startup   = imx_hifi_startup,
+	.shutdown  = imx_hifi_shutdown,
+};
+
+static int imx_wm8958_gpio_init(struct snd_soc_card *card)
+{
+	struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;
+	struct snd_soc_codec *codec = codec_dai->codec;
+	struct imx_priv *priv = &card_priv;
+	int ret;
+	priv->codec = codec;
+
+	if (gpio_is_valid(priv->hp_gpio)) {
+		imx_hp_jack_gpio.gpio = priv->hp_gpio;
+		imx_hp_jack_gpio.jack_status_check = hpjack_status_check;
+
+		ret = snd_soc_jack_new(codec, "Headphone Jack",
+				SND_JACK_HEADPHONE, &imx_hp_jack);
+		if (ret)
+			return ret;
+		ret = snd_soc_jack_add_pins(&imx_hp_jack,
+			ARRAY_SIZE(imx_hp_jack_pins), imx_hp_jack_pins);
+		if (ret)
+			return ret;
+		ret = snd_soc_jack_add_gpios(&imx_hp_jack, 1,
+						&imx_hp_jack_gpio);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static ssize_t show_headphone(struct device_driver *dev, char *buf)
+{
+	struct imx_priv *priv = &card_priv;
+	int hp_status;
+
+	if (!gpio_is_valid(priv->hp_gpio)) {
+		strcpy(buf, "no detect gpio connected\n");
+		return strlen(buf);
+	}
+
+	/* Check if headphone is plugged in */
+	hp_status = gpio_get_value(priv->hp_gpio) ? 1 : 0;
+
+	if (hp_status != priv->hp_active_low)
+		strcpy(buf, "headphone\n");
+	else
+		strcpy(buf, "speaker\n");
+
+	return strlen(buf);
+}
+
+static DRIVER_ATTR(headphone, S_IRUGO | S_IWUSR, show_headphone, NULL);
+
+static int imx_wm8958_probe(struct platform_device *pdev)
+{
+	struct device_node *cpu_np, *codec_np;
+	struct device_node *np = pdev->dev.of_node;
+	struct platform_device *cpu_pdev;
+	struct imx_priv *priv = &card_priv;
+	struct i2c_client *codec_dev;
+	struct imx_wm8958_data *data;
+	int ret;
+
+	priv->pdev = pdev;
+
+	cpu_np = of_parse_phandle(np, "cpu-dai", 0);
+	if (!cpu_np) {
+		dev_err(&pdev->dev, "cpu dai phandle missing or invalid\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	codec_np = of_parse_phandle(np, "audio-codec", 0);
+	if (!codec_np) {
+		dev_err(&pdev->dev, "phandle missing or invalid\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	cpu_pdev = of_find_device_by_node(cpu_np);
+	if (!cpu_pdev) {
+		dev_err(&pdev->dev, "failed to find SAI platform device\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	codec_dev = of_find_i2c_device_by_node(codec_np);
+	if (!codec_dev || !codec_dev->dev.driver) {
+		dev_err(&pdev->dev, "failed to find codec platform device\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data) {
+		ret = -ENOMEM;
+		goto fail;
+	}
+
+	if (of_property_read_bool(np, "codec-master")) {
+		data->dai.dai_fmt = SND_SOC_DAIFMT_CBM_CFM;
+		data->is_codec_master = true;
+	} else
+		data->dai.dai_fmt = SND_SOC_DAIFMT_CBS_CFS;
+
+	data->mclk = devm_clk_get(&codec_dev->dev, "mclk1");
+	if (IS_ERR(data->mclk)) {
+		ret = PTR_ERR(data->mclk);
+		dev_err(&pdev->dev, "failed to get codec clk: %d\n", ret);
+		goto fail;
+	}
+
+	priv->hp_gpio = of_get_named_gpio_flags(np, "hp-det-gpios", 0,
+			(enum of_gpio_flags *)&priv->hp_active_low);
+
+	data->dai.name = "HiFi";
+	data->dai.stream_name = "HiFi";
+	data->dai.codec_dai_name = "wm8994-aif1";
+	data->dai.codec_name = "wm8994-codec";
+	data->dai.ignore_pmdown_time = 1;
+	data->dai.cpu_dai_name = dev_name(&cpu_pdev->dev);
+	data->dai.platform_of_node = cpu_np;
+	data->dai.ops = &imx_hifi_ops;
+	data->dai.dai_fmt |= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF;
+
+	data->card.dev = &pdev->dev;
+	ret = snd_soc_of_parse_card_name(&data->card, "model");
+	if (ret)
+		goto fail;
+
+	data->card.num_links = 1;
+	data->card.dai_link = &data->dai;
+	data->card.dapm_widgets = imx_wm8958_dapm_widgets;
+	data->card.num_dapm_widgets = ARRAY_SIZE(imx_wm8958_dapm_widgets);
+	data->card.dapm_routes = imx_wm8958_dapm_route;
+	data->card.num_dapm_routes = ARRAY_SIZE(imx_wm8958_dapm_route);
+	platform_set_drvdata(pdev, &data->card);
+	snd_soc_card_set_drvdata(&data->card, data);
+
+	ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
+	if (ret) {
+		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
+		goto fail;
+	}
+
+	priv->snd_card = data->card.snd_card;
+
+	priv->headphone_kctl = snd_kctl_jack_new("Headphone", 0, NULL);
+	ret = snd_ctl_add(data->card.snd_card, priv->headphone_kctl);
+	if (ret)
+		goto fail;
+
+	ret = imx_wm8958_gpio_init(&data->card);
+
+	if (gpio_is_valid(priv->hp_gpio)) {
+		ret = driver_create_file(pdev->dev.driver,
+						&driver_attr_headphone);
+		if (ret) {
+			dev_err(&pdev->dev,
+					"create hp attr failed (%d)\n", ret);
+			goto fail;
+		}
+	}
+
+fail:
+	if (cpu_np)
+		of_node_put(cpu_np);
+	if (codec_np)
+		of_node_put(codec_np);
+
+	return ret;
+}
+
+static int imx_wm8958_remove(struct platform_device *pdev)
+{
+	driver_remove_file(pdev->dev.driver, &driver_attr_headphone);
+	return 0;
+}
+
+static const struct of_device_id imx_wm8958_dt_ids[] = {
+	{ .compatible = "fsl,imx-audio-wm8958", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_wm8958_dt_ids);
+
+static struct platform_driver imx_wm8958_driver = {
+	.driver = {
+		.name = "imx-wm8958",
+		.owner = THIS_MODULE,
+		.pm = &snd_soc_pm_ops,
+		.of_match_table = imx_wm8958_dt_ids,
+	},
+	.probe = imx_wm8958_probe,
+	.remove = imx_wm8958_remove,
+};
+module_platform_driver(imx_wm8958_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("Freescale i.MX WM8958 ASoC machine driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:imx-wm8958");