SoundWire DMA platform driver binds to the platform device created by ACP PCI device. SoundWire DMA driver registers ALSA DMA component with ASoC framework.
Signed-off-by: Vijendar Mukunda Vijendar.Mukunda@amd.com --- sound/soc/amd/ps/acp63.h | 5 +++ sound/soc/amd/ps/ps-sdw-dma.c | 70 +++++++++++++++++++++++++++++++++++ 2 files changed, 75 insertions(+) create mode 100644 sound/soc/amd/ps/ps-sdw-dma.c
diff --git a/sound/soc/amd/ps/acp63.h b/sound/soc/amd/ps/acp63.h index d296059be4f0..eec58da7ec8b 100644 --- a/sound/soc/amd/ps/acp63.h +++ b/sound/soc/amd/ps/acp63.h @@ -148,6 +148,11 @@ struct pdm_dev_data { struct snd_pcm_substream *capture_stream; };
+struct sdw_dma_dev_data { + void __iomem *acp_base; + struct mutex *acp_lock; /* used to protect acp common register access */ +}; + /** * struct acp63_dev_data - acp pci driver context * @acp63_base: acp mmio base diff --git a/sound/soc/amd/ps/ps-sdw-dma.c b/sound/soc/amd/ps/ps-sdw-dma.c new file mode 100644 index 000000000000..f41849fd035c --- /dev/null +++ b/sound/soc/amd/ps/ps-sdw-dma.c @@ -0,0 +1,70 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * AMD ALSA SoC Pink Sardine SoundWire DMA Driver + * + * Copyright 2023 Advanced Micro Devices, Inc. + */ + +#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 "acp63.h" + +#define DRV_NAME "amd_ps_sdw_dma" + +static const struct snd_soc_component_driver acp63_sdw_component = { + .name = DRV_NAME, +}; + +static int acp63_sdw_platform_probe(struct platform_device *pdev) +{ + struct resource *res; + struct sdw_dma_dev_data *sdw_data; + int status; + + if (!pdev->dev.platform_data) { + dev_err(&pdev->dev, "platform_data not retrieved\n"); + return -ENODEV; + } + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n"); + return -ENODEV; + } + + sdw_data = devm_kzalloc(&pdev->dev, sizeof(*sdw_data), GFP_KERNEL); + if (!sdw_data) + return -ENOMEM; + + sdw_data->acp_base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); + if (!sdw_data->acp_base) + return -ENOMEM; + + sdw_data->acp_lock = pdev->dev.platform_data; + dev_set_drvdata(&pdev->dev, sdw_data); + status = devm_snd_soc_register_component(&pdev->dev, + &acp63_sdw_component, + NULL, 0); + if (status) + dev_err(&pdev->dev, "Fail to register sdw dma component\n"); + + return status; +} + +static struct platform_driver acp63_sdw_dma_driver = { + .probe = acp63_sdw_platform_probe, + .driver = { + .name = "amd_ps_sdw_dma", + }, +}; + +module_platform_driver(acp63_sdw_dma_driver); + +MODULE_AUTHOR("Vijendar.Mukunda@amd.com"); +MODULE_DESCRIPTION("AMD ACP6.3 PS SDW DMA Driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" DRV_NAME);