ASoC: AMD: add ACP3.0 PCI driver

#include "chip_offset_byte.h"

#define ACP3x_PHY_BASE_ADDRESS 0x1240000

static inline u32 rv_readl(void __iomem *base_addr)

{

	return readl(base_addr - ACP3x_PHY_BASE_ADDRESS);

}

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

{

	writel(val, base_addr - ACP3x_PHY_BASE_ADDRESS);

}

/*

 * AMD ALSA SoC PCM Driver

 *

 * Copyright 2016 Advanced Micro Devices, Inc.

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 *

 * This program is distributed in the hope it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

 * more details.

 */

#include <linux/pci.h>

#include <linux/module.h>

#include <linux/io.h>

#include "acp3x.h"

struct acp3x_dev_data {

	void __iomem *acp3x_base;

};

static int snd_acp3x_probe(struct pci_dev *pci,

			   const struct pci_device_id *pci_id)

{

	int ret;

	u32 addr;

	struct acp3x_dev_data *adata;

	if (pci_enable_device(pci)) {

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

		return -ENODEV;

	}

	ret = pci_request_regions(pci, "AMD ACP3x audio");

	if (ret < 0) {

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

		goto disable_pci;

	}

	adata = devm_kzalloc(&pci->dev, sizeof(struct acp3x_dev_data),

			     GFP_KERNEL);

	if (!adata) {

		ret = -ENOMEM;

		goto release_regions;

	}

	addr = pci_resource_start(pci, 0);

	adata->acp3x_base = ioremap(addr, pci_resource_len(pci, 0));

	if (!adata->acp3x_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_acp3x_remove(struct pci_dev *pci)

{

	struct acp3x_dev_data *adata = pci_get_drvdata(pci);

	iounmap(adata->acp3x_base);

	pci_release_regions(pci);

	pci_disable_device(pci);

}

static const struct pci_device_id snd_acp3x_ids[] = {

	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x15e2),

	.class = PCI_CLASS_MULTIMEDIA_OTHER << 8,

	.class_mask = 0xffffff },

	{ 0, },

};

MODULE_DEVICE_TABLE(pci, snd_acp3x_ids);

static struct pci_driver acp3x_driver  = {

	.name = KBUILD_MODNAME,

	.id_table = snd_acp3x_ids,

	.probe = snd_acp3x_probe,

	.remove = snd_acp3x_remove,

};

module_pci_driver(acp3x_driver);

MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com");

MODULE_DESCRIPTION("AMD ACP3x PCI driver");

MODULE_LICENSE("GPL v2");