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ASoC: amd: add ACP5x PCM platform driver

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PCM platform driver binds to the platform device created by
ACP5x PCI device. PCM driver registers ALSA DMA components
with ASoC framework.

Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/20210721180430.11571-6-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Vijendar Mukunda 2021-07-21 23:34:21 +05:30 committed by Mark Brown
parent 603f2dedcc
commit 77f61444e4
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GPG Key ID: 24D68B725D5487D0
2 changed files with 76 additions and 0 deletions
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72
sound/soc/amd/vangogh/acp5x-pcm-dma.c Normal file
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@ -0,0 +1,72 @@
// SPDX-License-Identifier: GPL-2.0+
//
// AMD ALSA SoC PCM Driver
//
// Copyright (C) 2021 Advanced Micro Devices, Inc. All rights reserved.
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/io.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include "acp5x.h"
#define DRV_NAME "acp5x_i2s_dma"
static const struct snd_soc_component_driver acp5x_i2s_component = {
.name = DRV_NAME,
};
static int acp5x_audio_probe(struct platform_device *pdev)
{
struct resource *res;
struct i2s_dev_data *adata;
int status;
if (!pdev->dev.platform_data) {
dev_err(&pdev->dev, "platform_data not retrieved\n");
return -ENODEV;
}
irqflags = *((unsigned int *)(pdev->dev.platform_data));
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->acp5x_base = devm_ioremap(&pdev->dev, res->start,
resource_size(res));
if (!adata->acp5x_base)
return -ENOMEM;
dev_set_drvdata(&pdev->dev, adata);
status = devm_snd_soc_register_component(&pdev->dev,
&acp5x_i2s_component,
NULL, 0);
if (status)
dev_err(&pdev->dev, "Fail to register acp i2s component\n");
return status;
}
static struct platform_driver acp5x_dma_driver = {
.probe = acp5x_audio_probe,
.driver = {
.name = "acp5x_i2s_dma",
},
};
module_platform_driver(acp5x_dma_driver);
MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
MODULE_DESCRIPTION("AMD ACP 5.x PCM Driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:" DRV_NAME);

4
sound/soc/amd/vangogh/acp5x.h
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@ -33,6 +33,10 @@
#define ACP5x_I2S_MODE 1
#define ACP5x_RES 4
struct i2s_dev_data {
void __iomem *acp5x_base;
};
/* common header file uses exact offset rather than relative
* offset which requires subtraction logic from base_addr
* for accessing ACP5x MMIO space registers