MLK-16784-5 sound: asoc: add machine driver for micfil in iMX8MM

Add machine driver for micfill IP in iMX8MM.

Signed-off-by: Cosmin-Gabriel Samoila <cosmin.samoila@nxp.com>
(cherry picked from commit 3c788dfc51a44bde546572e519cac8cfca3d8f2d)

1 files changed, 184 insertions, 0 deletions

diff --git a/sound/soc/fsl/imx-micfil.c b/sound/soc/fsl/imx-micfil.c
new file mode 100644
index 000000000000..13e5c992d195
--- /dev/null
+++ b/sound/soc/fsl/imx-micfil.c
@@ -0,0 +1,184 @@
+/*
+ * Copyright 2018 NXP
+ *
+ * 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 "fsl_micfil.h"
+
+#define RX 0
+#define TX 1
+
+struct imx_micfil_data {
+	char name[32];
+	struct snd_soc_dai_link dai;
+	struct snd_soc_card card;
+};
+
+static int imx_micfil_startup(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	static struct snd_pcm_hw_constraint_list constraint_rates;
+	int ret;
+	static u32 support_rates[] = {11025, 16000, 22050,
+				      32000, 44100, 48000,};
+
+	constraint_rates.list = support_rates;
+	constraint_rates.count = ARRAY_SIZE(support_rates);
+
+	ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+					 &constraint_rates);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int imx_micfil_hw_params(struct snd_pcm_substream *substream,
+				struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+	struct device *dev = rtd->card->dev;
+	unsigned int fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF;
+	unsigned int rate = params_rate(params);
+	int ret, dir;
+
+	/* For playback the XTOR is slave, and for record is master */
+	fmt |= tx ? SND_SOC_DAIFMT_CBS_CFS : SND_SOC_DAIFMT_CBM_CFM;
+	dir = tx ? SND_SOC_CLOCK_OUT : SND_SOC_CLOCK_IN;
+
+	/* set cpu DAI configuration */
+	ret = snd_soc_dai_set_fmt(rtd->cpu_dai, fmt);
+	if (ret) {
+		dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
+		return ret;
+	}
+
+	/* Specific configurations of DAIs starts from here */
+	ret = snd_soc_dai_set_sysclk(rtd->cpu_dai, 0,
+				     rate, dir);
+	if (ret) {
+		dev_err(dev,
+			"%s: failed to set cpu sysclk: %d\n", __func__,
+			ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+struct snd_soc_ops imx_micfil_ops = {
+	.startup = imx_micfil_startup,
+	.hw_params = imx_micfil_hw_params,
+};
+
+static int imx_micfil_probe(struct platform_device *pdev)
+{
+	struct device_node *cpu_np;
+	struct platform_device *cpu_pdev;
+	struct imx_micfil_data *data;
+	struct snd_soc_dai_link_component *dlc;
+	int ret;
+
+	dlc = devm_kzalloc(&pdev->dev, 3 * sizeof(*dlc), GFP_KERNEL);
+	if (!dlc)
+		return -ENOMEM;
+
+	cpu_np = of_parse_phandle(pdev->dev.of_node, "cpu-dai", 0);
+	if (!cpu_np) {
+		dev_err(&pdev->dev, "cpu dai phandle missing or invalid\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data) {
+		ret = -ENOMEM;
+		goto fail;
+	}
+
+	strncpy(data->name, cpu_np->name, sizeof(data->name) - 1);
+
+	cpu_pdev = of_find_device_by_node(cpu_np);
+	if (!cpu_pdev) {
+		dev_err(&pdev->dev, "failed to find MICFIL platform device\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	data->dai.cpus = &dlc[0];
+	data->dai.num_cpus = 1;
+	data->dai.platforms = &dlc[1];
+	data->dai.num_platforms = 1;
+	data->dai.codecs = &dlc[2];
+	data->dai.num_codecs = 1;
+	data->dai.name = "micfil hifi";
+	data->dai.stream_name = "micfil hifi";
+	data->dai.codecs->dai_name = "snd-soc-dummy-dai";
+	data->dai.codecs->name = "snd-soc-dummy";
+	data->dai.cpus->dai_name = dev_name(&cpu_pdev->dev);
+	data->dai.platforms->of_node = cpu_np;
+	data->dai.playback_only = false;
+	data->dai.ops = &imx_micfil_ops;
+	data->card.num_links = 1;
+	data->card.dai_link = &data->dai;
+	data->card.dev = &pdev->dev;
+	data->card.owner = THIS_MODULE;
+	ret = snd_soc_of_parse_card_name(&data->card, "model");
+	if (ret)
+		goto fail;
+
+	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;
+	}
+
+fail:
+	if (cpu_np)
+		of_node_put(cpu_np);
+	return ret;
+}
+
+static const struct of_device_id imx_micfil_dt_ids[] = {
+	{ .compatible = "fsl,imx-audio-micfil", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_micfil_dt_ids);
+
+static struct platform_driver imx_micfil_driver = {
+	.driver = {
+		.name = "imx-micfil",
+		.owner = THIS_MODULE,
+		.pm = &snd_soc_pm_ops,
+		.of_match_table = imx_micfil_dt_ids,
+	},
+	.probe = imx_micfil_probe,
+};
+module_platform_driver(imx_micfil_driver);
+
+MODULE_AUTHOR("Cosmin-Gabriel Samoila <cosmin.samoila@nxp.com>");
+MODULE_DESCRIPTION("NXP Micfil ASoC machine driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:imx-micfil");