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// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
//
// This file is provided under a dual BSD/GPLv2 license. When using or
// redistributing this file, you may do so under either license.
//
// Copyright(c) 2022 Advanced Micro Devices, Inc. All rights reserved.
//
// Authors: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
/*
* Generic PCI interface for ACP device
*/
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/module.h>
#include "amd.h"
#include "../mach-config.h"
#define DRV_NAME "acp_pci"
#define ACP3x_REG_START 0x1240000
#define ACP3x_REG_END 0x125C000
static struct platform_device *dmic_dev;
static struct platform_device *pdev;
static const struct resource acp_res[] = {
{
.start = 0,
.end = ACP3x_REG_END - ACP3x_REG_START,
.name = "acp_mem",
.flags = IORESOURCE_MEM,
},
{
.start = 0,
.end = 0,
.name = "acp_dai_irq",
.flags = IORESOURCE_IRQ,
},
};
static int acp_pci_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
{
struct platform_device_info pdevinfo;
struct device *dev = &pci->dev;
const struct resource *res_acp;
struct acp_chip_info *chip;
struct resource *res;
unsigned int flag, addr, num_res, i;
int ret;
flag = snd_amd_acp_find_config(pci);
if (flag != FLAG_AMD_LEGACY)
return -ENODEV;
chip = devm_kzalloc(&pci->dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
if (pci_enable_device(pci))
return dev_err_probe(&pci->dev, -ENODEV,
"pci_enable_device failed\n");
ret = pci_request_regions(pci, "AMD ACP3x audio");
if (ret < 0) {
dev_err(&pci->dev, "pci_request_regions failed\n");
ret = -ENOMEM;
goto disable_pci;
}
pci_set_master(pci);
res_acp = acp_res;
num_res = ARRAY_SIZE(acp_res);
switch (pci->revision) {
case 0x01:
chip->name = "acp_asoc_renoir";
chip->acp_rev = ACP3X_DEV;
break;
case 0x6f:
chip->name = "acp_asoc_rembrandt";
chip->acp_rev = ACP6X_DEV;
break;
default:
dev_err(dev, "Unsupported device revision:0x%x\n", pci->revision);
ret = -EINVAL;
goto release_regions;
}
dmic_dev = platform_device_register_data(dev, "dmic-codec", PLATFORM_DEVID_NONE, NULL, 0);
if (IS_ERR(dmic_dev)) {
dev_err(dev, "failed to create DMIC device\n");
ret = PTR_ERR(dmic_dev);
goto release_regions;
}
addr = pci_resource_start(pci, 0);
chip->base = devm_ioremap(&pci->dev, addr, pci_resource_len(pci, 0));
if (!chip->base) {
ret = -ENOMEM;
goto unregister_dmic_dev;
}
res = devm_kcalloc(&pci->dev, num_res, sizeof(struct resource), GFP_KERNEL);
if (!res) {
ret = -ENOMEM;
goto unregister_dmic_dev;
}
for (i = 0; i < num_res; i++, res_acp++) {
res[i].name = res_acp->name;
res[i].flags = res_acp->flags;
res[i].start = addr + res_acp->start;
res[i].end = addr + res_acp->end;
if (res_acp->flags == IORESOURCE_IRQ) {
res[i].start = pci->irq;
res[i].end = res[i].start;
}
}
memset(&pdevinfo, 0, sizeof(pdevinfo));
pdevinfo.name = chip->name;
pdevinfo.id = 0;
pdevinfo.parent = &pci->dev;
pdevinfo.num_res = num_res;
pdevinfo.res = &res[0];
pdevinfo.data = chip;
pdevinfo.size_data = sizeof(*chip);
pdev = platform_device_register_full(&pdevinfo);
if (IS_ERR(pdev)) {
dev_err(&pci->dev, "cannot register %s device\n", pdevinfo.name);
ret = PTR_ERR(pdev);
goto unregister_dmic_dev;
}
return ret;
unregister_dmic_dev:
platform_device_unregister(dmic_dev);
release_regions:
pci_release_regions(pci);
disable_pci:
pci_disable_device(pci);
return ret;
};
static void acp_pci_remove(struct pci_dev *pci)
{
if (dmic_dev)
platform_device_unregister(dmic_dev);
if (pdev)
platform_device_unregister(pdev);
}
/* PCI IDs */
static const struct pci_device_id acp_pci_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_PCI_DEV_ID)},
{ 0, }
};
MODULE_DEVICE_TABLE(pci, acp_pci_ids);
/* pci_driver definition */
static struct pci_driver snd_amd_acp_pci_driver = {
.name = KBUILD_MODNAME,
.id_table = acp_pci_ids,
.probe = acp_pci_probe,
.remove = acp_pci_remove,
};
module_pci_driver(snd_amd_acp_pci_driver);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_ALIAS(DRV_NAME);
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