@@ -1,5 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
# ACP 7.0 platform Support
snd-pci-acp70-y := pci-acp70.o
+snd-acp70-pdm-dma-y := acp70-pdm-dma.o
obj-$(CONFIG_SND_SOC_AMD_ACP70) += snd-pci-acp70.o
+obj-$(CONFIG_SND_SOC_AMD_ACP70) += snd-acp70-pdm-dma.o
new file mode 100644
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * AMD ALSA SoC ACP 7.0 PDM Driver
+ *
+ * Copyright 2024 Advanced Micro Devices, Inc.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+
+#include "acp70.h"
+
+#define DRV_NAME "acp70_pdm_dma"
+
+static struct snd_soc_dai_driver acp70_pdm_dai_driver = {
+ .name = "acp_acp70_pdm_dma.0",
+ .capture = {
+ .rates = SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S32_LE,
+ .channels_min = 2,
+ .channels_max = 2,
+ .rate_min = 48000,
+ .rate_max = 48000,
+ },
+};
+
+static const struct snd_soc_component_driver acp70_pdm_component = {
+ .name = DRV_NAME,
+};
+
+static int acp70_pdm_audio_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct pdm_dev_data *adata;
+ struct acp70_dev_data *acp_data;
+ struct device *parent;
+ int status;
+
+ parent = pdev->dev.parent;
+ acp_data = dev_get_drvdata(parent);
+ 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->acp70_base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+ if (!adata->acp70_base)
+ return -ENOMEM;
+
+ adata->capture_stream = NULL;
+ adata->acp_lock = &acp_data->acp_lock;
+ dev_set_drvdata(&pdev->dev, adata);
+ status = devm_snd_soc_register_component(&pdev->dev,
+ &acp70_pdm_component,
+ &acp70_pdm_dai_driver, 1);
+ if (status) {
+ dev_err(&pdev->dev, "Fail to register acp pdm dai\n");
+
+ return -ENODEV;
+ }
+ return 0;
+}
+
+static struct platform_driver acp70_pdm_dma_driver = {
+ .probe = acp70_pdm_audio_probe,
+ .driver = {
+ .name = "acp70_pdm_dma",
+ },
+};
+
+module_platform_driver(acp70_pdm_dma_driver);
+
+MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
+MODULE_DESCRIPTION("AMD ACP 7.0 PDM Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);
@@ -58,6 +58,13 @@ enum acp_config {
ACP_CONFIG_20,
};
+struct pdm_dev_data {
+ u32 pdm_irq;
+ void __iomem *acp70_base;
+ struct mutex *acp_lock; /* mutex to protect acp common register access */
+ struct snd_pcm_substream *capture_stream;
+};
+
/**
* struct acp70_dev_data - acp pci driver context
* @acp70_base: acp mmio base
PDM platform driver binds to the platform device created by ACP7.0 PCI device. PDM driver registers ALSA DMA and CPU DAI components with ASoC framework. Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com> --- sound/soc/amd/acp70/Makefile | 2 + sound/soc/amd/acp70/acp70-pdm-dma.c | 87 +++++++++++++++++++++++++++++ sound/soc/amd/acp70/acp70.h | 7 +++ 3 files changed, 96 insertions(+) create mode 100644 sound/soc/amd/acp70/acp70-pdm-dma.c