Unverified Commit 665dd181 authored by Vijendar Mukunda's avatar Vijendar Mukunda Committed by Mark Brown
Browse files

ASoC: amd: ps: add SoundWire dma driver 



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: default avatarVijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/20230612095903.2113464-4-Vijendar.Mukunda@amd.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent e1cb3506

sound/soc/amd/ps/acp63.h

+5 −0
Original line number Diff line number Diff line
@@ -137,6 +137,11 @@ 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

sound/soc/amd/ps/ps-sdw-dma.c

0 → 100644
+70 −0
Original line number Diff line number Diff line 
// 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;

	struct acp63_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;

	}



	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 = &acp_data->acp_lock;

	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);