PDM platform driver binds to the platform device created by ACP6x 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/yc/acp6x-pdm-dma.c | 81 ++++++++++++++++++++++++++++++++ sound/soc/amd/yc/acp6x.h | 5 ++ 2 files changed, 86 insertions(+) create mode 100644 sound/soc/amd/yc/acp6x-pdm-dma.c
diff --git a/sound/soc/amd/yc/acp6x-pdm-dma.c b/sound/soc/amd/yc/acp6x-pdm-dma.c new file mode 100644 index 000000000000..75228ce74da1 --- /dev/null +++ b/sound/soc/amd/yc/acp6x-pdm-dma.c @@ -0,0 +1,81 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * AMD ALSA SoC Yellow Carp PDM Driver + * + * Copyright 2021 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 "acp6x.h" + +#define DRV_NAME "acp_yc_pdm_dma" + +static struct snd_soc_dai_driver acp6x_pdm_dai_driver = { + .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 acp6x_pdm_component = { + .name = DRV_NAME, +}; + +static int acp6x_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->acp6x_base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); + if (!adata->acp6x_base) + return -ENOMEM; + + adata->capture_stream = NULL; + + dev_set_drvdata(&pdev->dev, adata); + status = devm_snd_soc_register_component(&pdev->dev, + &acp6x_pdm_component, + &acp6x_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 acp6x_pdm_dma_driver = { + .probe = acp6x_pdm_audio_probe, + .driver = { + .name = "acp_yc_pdm_dma", + }, +}; + +module_platform_driver(acp6x_pdm_dma_driver); + +MODULE_AUTHOR("Vijendar.Mukunda@amd.com"); +MODULE_DESCRIPTION("AMD ACP6x YC PDM Driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" DRV_NAME); diff --git a/sound/soc/amd/yc/acp6x.h b/sound/soc/amd/yc/acp6x.h index 63bdea3188ea..d6b2c70ce9c8 100644 --- a/sound/soc/amd/yc/acp6x.h +++ b/sound/soc/amd/yc/acp6x.h @@ -45,6 +45,11 @@ enum acp_config { ACP_CONFIG_15, };
+struct pdm_dev_data { + void __iomem *acp6x_base; + struct snd_pcm_substream *capture_stream; +}; + static inline u32 acp6x_readl(void __iomem *base_addr) { return readl(base_addr - ACP6x_PHY_BASE_ADDRESS);