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ASoC: amd: add acp6x pdm platform driver

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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>
Link: https://lore.kernel.org/r/20211018112044.1705805-6-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Vijendar Mukunda 2021-10-18 16:50:36 +05:30 committed by Mark Brown
parent fc329c1de4
commit 7610174a5b
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2 changed files with 86 additions and 0 deletions
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81
sound/soc/amd/yc/acp6x-pdm-dma.c Normal file
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@ -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);

5
sound/soc/amd/yc/acp6x.h
View File

@ -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);