[PATCH 08/12] ASoC: amd: add vangogh i2s controller driver

[Vijendar Mukunda]

Add Vangogh I2S controller driver to support two I2S controller
instances.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda at amd.com>
---
 sound/soc/amd/vangogh/acp5x-i2s.c | 97 +++++++++++++++++++++++++++++++
 sound/soc/amd/vangogh/acp5x.h     |  4 ++
 2 files changed, 101 insertions(+)
 create mode 100644 sound/soc/amd/vangogh/acp5x-i2s.c

diff --git a/sound/soc/amd/vangogh/acp5x-i2s.c b/sound/soc/amd/vangogh/acp5x-i2s.c
new file mode 100644
index 000000000000..0945c6452189
--- /dev/null
+++ b/sound/soc/amd/vangogh/acp5x-i2s.c
@@ -0,0 +1,97 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// AMD ALSA SoC PCM Driver
+//
+// Copyright (C) 2021 Advanced Micro Devices, Inc. All rights reserved.
+
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+#include <linux/dma-mapping.h>
+
+#include "acp5x.h"
+
+#define DRV_NAME "acp5x_i2s_playcap"
+
+static const struct snd_soc_component_driver acp5x_dai_component = {
+	.name = "acp5x-i2s",
+};
+
+static struct snd_soc_dai_driver acp5x_i2s_dai = {
+	.playback = {
+		.rates = SNDRV_PCM_RATE_8000_96000,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
+			SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S32_LE,
+		.channels_min = 2,
+		.channels_max = 2,
+		.rate_min = 8000,
+		.rate_max = 96000,
+	},
+	.capture = {
+		.rates = SNDRV_PCM_RATE_8000_96000,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
+			SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S32_LE,
+		.channels_min = 2,
+		.channels_max = 2,
+		.rate_min = 8000,
+		.rate_max = 96000,
+	},
+};
+
+static int acp5x_dai_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+	struct i2s_dev_data *adata;
+	int ret;
+
+	adata = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dev_data),
+			     GFP_KERNEL);
+	if (!adata)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n");
+		return -ENOMEM;
+	}
+	adata->acp5x_base = devm_ioremap(&pdev->dev, res->start,
+					 resource_size(res));
+	if (IS_ERR(adata->acp5x_base))
+		return PTR_ERR(adata->acp5x_base);
+
+	adata->master_mode = I2S_MASTER_MODE_ENABLE;
+	dev_set_drvdata(&pdev->dev, adata);
+	ret = devm_snd_soc_register_component(&pdev->dev,
+					      &acp5x_dai_component,
+					      &acp5x_i2s_dai, 1);
+	if (ret) {
+		dev_err(&pdev->dev, "Fail to register acp i2s dai\n");
+		return -ENODEV;
+	}
+	return 0;
+}
+
+static int acp5x_dai_remove(struct platform_device *pdev)
+{
+	/* As we use devm_ memory alloc there is nothing TBD here */
+	return 0;
+}
+
+static struct platform_driver acp5x_dai_driver = {
+	.probe = acp5x_dai_probe,
+	.remove = acp5x_dai_remove,
+	.driver = {
+		.name = "acp5x_i2s_playcap",
+	},
+};
+
+module_platform_driver(acp5x_dai_driver);
+
+MODULE_AUTHOR("Vijendar.Mukunda at amd.com");
+MODULE_DESCRIPTION("AMD ACP5.x CPU DAI Driver");
+MODULE_ALIAS("platform:" DRV_NAME);
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/amd/vangogh/acp5x.h b/sound/soc/amd/vangogh/acp5x.h
index 99298a2f38ce..27cdd3b08701 100644
--- a/sound/soc/amd/vangogh/acp5x.h
+++ b/sound/soc/amd/vangogh/acp5x.h
@@ -70,7 +70,11 @@
 #define DMA_SIZE 0x40
 #define FRM_LEN 0x100
 
+#define I2S_MASTER_MODE_ENABLE 0x01
+#define I2S_MASTER_MODE_DISABLE 0x00
+
 struct i2s_dev_data {
+	bool master_mode;
 	unsigned int i2s_irq;
 	void __iomem *acp5x_base;
 	struct snd_pcm_substream *play_stream;
-- 
2.17.1