Unverified Commit 003b9a96 authored by Syed Saba Kareem's avatar Syed Saba Kareem Committed by Mark Brown
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ASoC: amd: add ACP PCI driver for RPL platform 



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

Signed-off-by: default avatarSyed Saba Kareem <Syed.SabaKareem@amd.com>
Reviewed-by: default avatarVijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/20220721061035.91139-2-Syed.SabaKareem@amd.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent d6a2cc9a

sound/soc/amd/rpl/rpl-pci-acp6x.c

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

/*

 * AMD RPL ACP PCI Driver

 *

 * Copyright 2022 Advanced Micro Devices, Inc.

 */



#include <linux/pci.h>

#include <linux/module.h>

#include <linux/io.h>

#include <linux/delay.h>

#include <linux/platform_device.h>



#include "rpl_acp6x.h"



struct rpl_dev_data {

	void __iomem *acp6x_base;

};



static int snd_rpl_probe(struct pci_dev *pci,

			 const struct pci_device_id *pci_id)

{

	struct rpl_dev_data *adata;

	u32 addr;

	int ret;



	/* RPL device check */

	switch (pci->revision) {

	case 0x62:

		break;

	default:

		dev_dbg(&pci->dev, "acp6x pci device not found\n");

		return -ENODEV;

	}

	if (pci_enable_device(pci)) {

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

		return -ENODEV;

	}



	ret = pci_request_regions(pci, "AMD ACP6x audio");

	if (ret < 0) {

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

		goto disable_pci;

	}



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

			     GFP_KERNEL);

	if (!adata) {

		ret = -ENOMEM;

		goto release_regions;

	}



	addr = pci_resource_start(pci, 0);

	adata->acp6x_base = devm_ioremap(&pci->dev, addr,

					 pci_resource_len(pci, 0));

	if (!adata->acp6x_base) {

		ret = -ENOMEM;

		goto release_regions;

	}

	pci_set_master(pci);

	pci_set_drvdata(pci, adata);

	return 0;

release_regions:

	pci_release_regions(pci);

disable_pci:

	pci_disable_device(pci);



	return ret;

}



static void snd_rpl_remove(struct pci_dev *pci)

{

	pci_release_regions(pci);

	pci_disable_device(pci);

}



static const struct pci_device_id snd_rpl_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_rpl_ids);



static struct pci_driver rpl_acp6x_driver  = {

	.name = KBUILD_MODNAME,

	.id_table = snd_rpl_ids,

	.probe = snd_rpl_probe,

	.remove = snd_rpl_remove,

};



module_pci_driver(rpl_acp6x_driver);



MODULE_DESCRIPTION("AMD ACP RPL PCI driver");

MODULE_LICENSE("GPL v2");

sound/soc/amd/rpl/rpl_acp6x.h

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

/*

 * AMD ACP Driver

 *

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

 */



#include "rpl_acp6x_chip_offset_byte.h"



#define ACP_DEVICE_ID 0x15E2

#define ACP6x_PHY_BASE_ADDRESS 0x1240000



static inline u32 rpl_acp_readl(void __iomem *base_addr)

{

	return readl(base_addr - ACP6x_PHY_BASE_ADDRESS);

}



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

{

	writel(val, base_addr - ACP6x_PHY_BASE_ADDRESS);

}