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
diff --git a/sound/soc/amd/acp70/Makefile b/sound/soc/amd/acp70/Makefile index 5e553de6c772..778bdf268731 100644 --- a/sound/soc/amd/acp70/Makefile +++ b/sound/soc/amd/acp70/Makefile @@ -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 diff --git a/sound/soc/amd/acp70/acp70-pdm-dma.c b/sound/soc/amd/acp70/acp70-pdm-dma.c new file mode 100644 index 000000000000..fd31e31a02a6 --- /dev/null +++ b/sound/soc/amd/acp70/acp70-pdm-dma.c @@ -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); diff --git a/sound/soc/amd/acp70/acp70.h b/sound/soc/amd/acp70/acp70.h index 68035fbf23d1..c7cabb98cc1a 100644 --- a/sound/soc/amd/acp70/acp70.h +++ b/sound/soc/amd/acp70/acp70.h @@ -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