Unverified Commit 4a7151c9 authored by Vijendar Mukunda's avatar Vijendar Mukunda Committed by Mark Brown
Browse files

ASoC: amd: add Vangogh ACP PCI driver 



ACP is a PCI audio device.
This patch adds PCI driver to bind to this device and get
PCI resources.

Reviewed-by: default avatarPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: default avatarVijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/20210721180430.11571-3-Vijendar.Mukunda@amd.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 7bf060d0

sound/soc/amd/vangogh/acp5x.h

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/* SPDX-License-Identifier: GPL-2.0+ */

/*

 * AMD ALSA SoC PCM Driver

 *

 * Copyright (C) 2021 Advanced Micro Devices, Inc. All rights reserved.

 */



#include "vg_chip_offset_byte.h"



#define ACP5x_PHY_BASE_ADDRESS 0x1240000

#define ACP_DEVICE_ID 0x15E2



/* common header file uses exact offset rather than relative

 * offset which requires subtraction logic from base_addr

 * for accessing ACP5x MMIO space registers

 */

static inline u32 acp_readl(void __iomem *base_addr)

{

	return readl(base_addr - ACP5x_PHY_BASE_ADDRESS);

}



static inline void acp_writel(u32 val, void __iomem *base_addr)

{

	writel(val, base_addr - ACP5x_PHY_BASE_ADDRESS);

}

sound/soc/amd/vangogh/pci-acp5x.c

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// SPDX-License-Identifier: GPL-2.0+

//

// AMD Vangogh ACP PCI Driver

//

// Copyright (C) 2021 Advanced Micro Devices, Inc. All rights reserved.



#include <linux/pci.h>

#include <linux/module.h>

#include <linux/io.h>



#include "acp5x.h"



struct acp5x_dev_data {

	void __iomem *acp5x_base;

};



static int snd_acp5x_probe(struct pci_dev *pci,

			   const struct pci_device_id *pci_id)

{

	struct acp5x_dev_data *adata;

	int ret;

	u32 addr;



	if (pci->revision != 0x50)

		return -ENODEV;



	if (pci_enable_device(pci)) {

		dev_err(&pci->dev, "pci_enable_device failed\n");

		return -ENODEV;

	}



	ret = pci_request_regions(pci, "AMD ACP5x audio");

	if (ret < 0) {

		dev_err(&pci->dev, "pci_request_regions failed\n");

		goto disable_pci;

	}



	adata = devm_kzalloc(&pci->dev, sizeof(struct acp5x_dev_data),

			     GFP_KERNEL);

	if (!adata) {

		ret = -ENOMEM;

		goto release_regions;

	}

	addr = pci_resource_start(pci, 0);

	adata->acp5x_base = devm_ioremap(&pci->dev, addr,

					 pci_resource_len(pci, 0));

	if (!adata->acp5x_base) {

		ret = -ENOMEM;

		goto release_regions;

	}

	pci_set_master(pci);

	pci_set_drvdata(pci, adata);



release_regions:

	pci_release_regions(pci);

disable_pci:

	pci_disable_device(pci);



	return ret;

}



static void snd_acp5x_remove(struct pci_dev *pci)

{

	pci_release_regions(pci);

	pci_disable_device(pci);

}



static const struct pci_device_id snd_acp5x_ids[] = {

	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_DEVICE_ID),

	.class = PCI_CLASS_MULTIMEDIA_OTHER << 8,

	.class_mask = 0xffffff },

	{ 0, },

};

MODULE_DEVICE_TABLE(pci, snd_acp5x_ids);



static struct pci_driver acp5x_driver  = {

	.name = KBUILD_MODNAME,

	.id_table = snd_acp5x_ids,

	.probe = snd_acp5x_probe,

	.remove = snd_acp5x_remove,

};



module_pci_driver(acp5x_driver);



MODULE_AUTHOR("Vijendar.Mukunda@amd.com");

MODULE_DESCRIPTION("AMD Vangogh ACP PCI driver");

MODULE_LICENSE("GPL v2");