ASoC: amd: add ACP5x PCM platform driver

PCM platform driver binds to the platform device created by
ACP5x PCI device. PCM driver registers ALSA DMA components
with ASoC framework.

Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/20210721180430.11571-6-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/amd/vangogh/acp5x-pcm-dma.c b/sound/soc/amd/vangogh/acp5x-pcm-dma.c
new file mode 100644 (file)
index 0000000..60d752a
--- /dev/null
+++ b/sound/soc/amd/vangogh/acp5x-pcm-dma.c
@@ -0,0 +1,72 @@
+// 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.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+
+#include "acp5x.h"
+
+#define DRV_NAME "acp5x_i2s_dma"
+
+static const struct snd_soc_component_driver acp5x_i2s_component = {
+       .name           = DRV_NAME,
+};
+
+static int acp5x_audio_probe(struct platform_device *pdev)
+{
+       struct resource *res;
+       struct i2s_dev_data *adata;
+       int status;
+
+       if (!pdev->dev.platform_data) {
+               dev_err(&pdev->dev, "platform_data not retrieved\n");
+               return -ENODEV;
+       }
+       irqflags = *((unsigned int *)(pdev->dev.platform_data));
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (!res) {
+               dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n");
+               return -ENODEV;
+       }
+
+       adata = devm_kzalloc(&pdev->dev, sizeof(*adata), GFP_KERNEL);
+       if (!adata)
+               return -ENOMEM;
+
+       adata->acp5x_base = devm_ioremap(&pdev->dev, res->start,
+                                        resource_size(res));
+       if (!adata->acp5x_base)
+               return -ENOMEM;
+       dev_set_drvdata(&pdev->dev, adata);
+       status = devm_snd_soc_register_component(&pdev->dev,
+                                                &acp5x_i2s_component,
+                                                NULL, 0);
+       if (status)
+               dev_err(&pdev->dev, "Fail to register acp i2s component\n");
+
+       return status;
+}
+
+static struct platform_driver acp5x_dma_driver = {
+       .probe = acp5x_audio_probe,
+       .driver = {
+               .name = "acp5x_i2s_dma",
+       },
+};
+
+module_platform_driver(acp5x_dma_driver);
+
+MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
+MODULE_DESCRIPTION("AMD ACP 5.x PCM Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRV_NAME);

diff --git a/sound/soc/amd/vangogh/acp5x.h b/sound/soc/amd/vangogh/acp5x.h
index 32e5db1..e450fb3 100644 (file)
--- a/sound/soc/amd/vangogh/acp5x.h
+++ b/sound/soc/amd/vangogh/acp5x.h
@@ -33,6 +33,10 @@
 #define ACP5x_I2S_MODE 1
 #define ACP5x_RES 4
 
+struct i2s_dev_data {
+       void __iomem *acp5x_base;
+};
+
 /* common header file uses exact offset rather than relative
  * offset which requires subtraction logic from base_addr
  * for accessing ACP5x MMIO space registers