Unverified Commit 7610174a authored by Vijendar Mukunda's avatar Vijendar Mukunda Committed by Mark Brown
Browse files

ASoC: amd: add acp6x pdm platform driver 



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: default avatarVijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/20211018112044.1705805-6-Vijendar.Mukunda@amd.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent fc329c1d

sound/soc/amd/yc/acp6x-pdm-dma.c

0 → 100644
+81 −0
Original line number Diff line number Diff line 
// 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);

sound/soc/amd/yc/acp6x.h

+5 −0
Original line number Diff line number Diff line
@@ -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);