MLK-15071-2: ASoC: fsl: Add machine driver for AK5558

Add machine driver for i.MX boards that have AK5558 ADC attached to SAI.

Signed-off-by: Mihai Serban <mihai.serban@nxp.com>
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
[ Aisheng: clean for a new base ]
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>

1 files changed, 169 insertions, 0 deletions

diff --git a/sound/soc/fsl/imx-ak5558.c b/sound/soc/fsl/imx-ak5558.c
new file mode 100644
index 000000000000..59dc901ea37f
--- /dev/null
+++ b/sound/soc/fsl/imx-ak5558.c
@@ -0,0 +1,169 @@
+/* i.MX AK5558 audio support
+ *
+ * Copyright 2017 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/init.h>
+#include <linux/slab.h>
+#include <linux/gpio/consumer.h>
+#include <linux/of_device.h>
+#include <sound/soc.h>
+#include <sound/pcm_params.h>
+#include <sound/soc-dapm.h>
+
+#include "../codecs/ak5558.h"
+
+
+struct imx_ak5558_data {
+	struct snd_soc_card card;
+};
+
+static struct snd_soc_dapm_widget imx_ak5558_dapm_widgets[] = {
+	SND_SOC_DAPM_LINE("Line In", NULL),
+};
+
+static int imx_aif_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 snd_soc_card *card = rtd->card;
+	struct device *dev = card->dev;
+	unsigned int channels = params_channels(params);
+	unsigned int fmt;
+	int ret;
+
+	fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+		SND_SOC_DAIFMT_CBS_CFS;
+
+	ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
+	if (ret) {
+		dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
+		return ret;
+	}
+
+	ret = snd_soc_dai_set_fmt(codec_dai, fmt);
+	if (ret) {
+		dev_err(dev, "failed to set codec dai fmt: %d\n", ret);
+		return ret;
+	}
+
+	ret = snd_soc_dai_set_tdm_slot(cpu_dai,
+				       BIT(channels) - 1, BIT(channels) - 1,
+				       2, 32);
+	if (ret) {
+		dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);
+		return ret;
+	}
+
+	return ret;
+}
+
+static struct snd_soc_ops imx_aif_ops = {
+	.hw_params = imx_aif_hw_params,
+};
+
+static struct snd_soc_dai_link imx_ak5558_dai = {
+	.name = "ak5558",
+	.stream_name = "Audio",
+	.codec_dai_name = "ak5558-aif",
+	.ops = &imx_aif_ops,
+	.capture_only = 1,
+};
+
+static int imx_ak5558_probe(struct platform_device *pdev)
+{
+	struct imx_ak5558_data *priv;
+	struct device_node *cpu_np, *codec_np = NULL;
+	struct platform_device *cpu_pdev;
+	int ret;
+
+
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	cpu_np = of_parse_phandle(pdev->dev.of_node, "audio-cpu", 0);
+	if (!cpu_np) {
+		dev_err(&pdev->dev, "audio dai phandle missing or invalid\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
+	if (!codec_np) {
+		dev_err(&pdev->dev, "audio codec 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;
+	}
+
+	imx_ak5558_dai.codec_of_node = codec_np;
+	imx_ak5558_dai.cpu_dai_name = dev_name(&cpu_pdev->dev);
+	imx_ak5558_dai.platform_of_node = cpu_np;
+	imx_ak5558_dai.capture_only = 1;
+
+	priv->card.dai_link = &imx_ak5558_dai;
+	priv->card.num_links = 1;
+	priv->card.dev = &pdev->dev;
+	priv->card.owner = THIS_MODULE;
+	priv->card.dapm_widgets = imx_ak5558_dapm_widgets;
+	priv->card.num_dapm_widgets = ARRAY_SIZE(imx_ak5558_dapm_widgets);
+
+	ret = snd_soc_of_parse_card_name(&priv->card, "model");
+	if (ret)
+		goto fail;
+
+	snd_soc_card_set_drvdata(&priv->card, priv);
+
+	ret = devm_snd_soc_register_card(&pdev->dev, &priv->card);
+	if (ret) {
+		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
+		goto fail;
+	}
+
+	ret = 0;
+fail:
+	if (cpu_np)
+		of_node_put(cpu_np);
+	if (codec_np)
+		of_node_put(codec_np);
+
+	return ret;
+}
+
+static const struct of_device_id imx_ak5558_dt_ids[] = {
+	{ .compatible = "fsl,imx-audio-ak5558", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, imx_ak5558_dt_ids);
+
+static struct platform_driver imx_ak5558_driver = {
+	.driver = {
+		.name = "imx-ak5558",
+		.pm = &snd_soc_pm_ops,
+		.of_match_table = imx_ak5558_dt_ids,
+	},
+	.probe = imx_ak5558_probe,
+};
+module_platform_driver(imx_ak5558_driver);
+
+MODULE_AUTHOR("Mihai Serban <mihai.serban@nxp.com>");
+MODULE_DESCRIPTION("Freescale i.MX AK5558 ASoC machine driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:imx-ak5558");