PDM platform driver binds to the platform device created by
ACP6.2 PCI device. PDM driver registers ALSA DMA and CPU DAI
components with ASoC framework.
Signed-off-by: Syed Saba Kareem <Syed.SabaKareem@xxxxxxx>
---
sound/soc/amd/ps/acp62.h | 5 +++
sound/soc/amd/ps/ps-pdm-dma.c | 82 +++++++++++++++++++++++++++++++++++
2 files changed, 87 insertions(+)
create mode 100644 sound/soc/amd/ps/ps-pdm-dma.c
diff --git a/sound/soc/amd/ps/acp62.h b/sound/soc/amd/ps/acp62.h
index ab56e1f8c31b..7636bfeb8a8a 100644
--- a/sound/soc/amd/ps/acp62.h
+++ b/sound/soc/amd/ps/acp62.h
@@ -45,6 +45,11 @@ enum acp_config {
ACP_CONFIG_15,
};
+struct pdm_dev_data {
+ void __iomem *acp62_base;
+ struct snd_pcm_substream *capture_stream;
+};
+
static inline u32 acp62_readl(void __iomem *base_addr)
{
return readl(base_addr - ACP62_PHY_BASE_ADDRESS);
diff --git a/sound/soc/amd/ps/ps-pdm-dma.c b/sound/soc/amd/ps/ps-pdm-dma.c
new file mode 100644
index 000000000000..bca2ac3e81f5
--- /dev/null
+++ b/sound/soc/amd/ps/ps-pdm-dma.c
@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * AMD ALSA SoC Pink Sardine PDM Driver
+ *
+ * Copyright 2022 Advanced Micro Devices, Inc.
+ */
+
+#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 "acp62.h"
+
+#define DRV_NAME "acp_ps_pdm_dma"
+
+static struct snd_soc_dai_driver acp62_pdm_dai_driver = {
+ .name = "acp_ps_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 acp62_pdm_component = {
+ .name = DRV_NAME,
+};
+
+static int acp62_pdm_audio_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct pdm_dev_data *adata;
+ int status;
+
+ 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->acp62_base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+ if (!adata->acp62_base)
+ return -ENOMEM;
+
+ adata->capture_stream = NULL;
+
+ dev_set_drvdata(&pdev->dev, adata);
+ status = devm_snd_soc_register_component(&pdev->dev,
+ &acp62_pdm_component,
+ &acp62_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 acp62_pdm_dma_driver = {
+ .probe = acp62_pdm_audio_probe,
+ .driver = {
+ .name = "acp_ps_pdm_dma",
+ },
+};
+
+module_platform_driver(acp62_pdm_dma_driver);
+
+MODULE_AUTHOR("Syed.SabaKareem@xxxxxxx");
+MODULE_DESCRIPTION("AMD PHEONIX PDM Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRV_NAME);
--
2.25.1
