PDM platform driver binds to the platform device created by
ACP3x PCI device. PDM driver registers ALSA DMA and CPU DAI
components with ASoC framework.
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@xxxxxxx>
---
sound/soc/amd/renoir/acp3x-pdm-dma.c | 95 ++++++++++++++++++++++++++++
sound/soc/amd/renoir/rn_acp3x.h | 5 ++
2 files changed, 100 insertions(+)
create mode 100644 sound/soc/amd/renoir/acp3x-pdm-dma.c
diff --git a/sound/soc/amd/renoir/acp3x-pdm-dma.c b/sound/soc/amd/renoir/acp3x-pdm-dma.c
new file mode 100644
index 000000000000..1dda8cf2edd2
--- /dev/null
+++ b/sound/soc/amd/renoir/acp3x-pdm-dma.c
@@ -0,0 +1,95 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// AMD ALSA SoC PDM Driver
+//
+//Copyright 2020 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 "rn_acp3x.h"
+
+#define DRV_NAME "acp_rn_pdm_dma"
+
+static struct snd_soc_dai_driver acp_pdm_dai_driver = {
+ .capture = {
+ .rates = SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S24_LE |
+ SNDRV_PCM_FMTBIT_S32_LE,
+ .channels_min = 2,
+ .channels_max = 2,
+ .rate_min = 48000,
+ .rate_max = 48000,
+ },
+};
+
+static const struct snd_soc_component_driver acp_pdm_component = {
+ .name = DRV_NAME,
+};
+
+static int acp_pdm_audio_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct pdm_dev_data *adata;
+ unsigned int irqflags;
+ 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->acp_base = devm_ioremap(&pdev->dev, res->start,
+ resource_size(res));
+ if (!adata->acp_base)
+ return -ENOMEM;
+
+ adata->capture_stream = NULL;
+
+ dev_set_drvdata(&pdev->dev, adata);
+ status = devm_snd_soc_register_component(&pdev->dev,
+ &acp_pdm_component,
+ &acp_pdm_dai_driver, 1);
+ if (status) {
+ dev_err(&pdev->dev, "Fail to register acp pdm dai\n");
+
+ return -ENODEV;
+ }
+ return 0;
+}
+
+static int acp_pdm_audio_remove(struct platform_device *pdev)
+{
+ return 0;
+}
+
+static struct platform_driver acp_pdm_dma_driver = {
+ .probe = acp_pdm_audio_probe,
+ .remove = acp_pdm_audio_remove,
+ .driver = {
+ .name = "acp_rn_pdm_dma",
+ },
+};
+
+module_platform_driver(acp_pdm_dma_driver);
+
+MODULE_AUTHOR("Vijendar.Mukunda@xxxxxxx");
+MODULE_DESCRIPTION("AMD ACP3x Renior PDM Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRV_NAME);
diff --git a/sound/soc/amd/renoir/rn_acp3x.h b/sound/soc/amd/renoir/rn_acp3x.h
index 5e4fd99397d5..0b450882c6c4 100644
--- a/sound/soc/amd/renoir/rn_acp3x.h
+++ b/sound/soc/amd/renoir/rn_acp3x.h
@@ -29,6 +29,11 @@
#define ACP_ERROR_MASK 0x20000000
#define ACP_EXT_INTR_STAT_CLEAR_MASK 0xFFFFFFFF
+struct pdm_dev_data {
+ void __iomem *acp_base;
+ struct snd_pcm_substream *capture_stream;
+};
+
static inline u32 rn_readl(void __iomem *base_addr)
{
return readl(base_addr - ACP_PHY_BASE_ADDRESS);
--
2.26.2
