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// SPDX-License-Identifier: GPL-2.0+
//
// AMD ACP PCI Driver
//
//Copyright 2016 Advanced Micro Devices, Inc.
#include <linux/pci.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include "acp3x.h"
struct acp3x_dev_data {
void __iomem *acp3x_base;
bool acp3x_audio_mode;
struct resource *res;
struct platform_device *pdev;
};
static int snd_acp3x_probe(struct pci_dev *pci,
const struct pci_device_id *pci_id)
{
int ret;
u32 addr, val;
struct acp3x_dev_data *adata;
struct platform_device_info pdevinfo;
unsigned int irqflags;
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;
}
/* check for msi interrupt support */
ret = pci_enable_msi(pci);
if (ret)
/* msi is not enabled */
irqflags = IRQF_SHARED;
else
/* msi is enabled */
irqflags = 0;
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);
val = rv_readl(adata->acp3x_base + mmACP_I2S_PIN_CONFIG);
switch (val) {
case I2S_MODE:
adata->res = devm_kzalloc(&pci->dev,
sizeof(struct resource) * 2,
GFP_KERNEL);
if (!adata->res) {
ret = -ENOMEM;
goto unmap_mmio;
}
adata->res[0].name = "acp3x_i2s_iomem";
adata->res[0].flags = IORESOURCE_MEM;
adata->res[0].start = addr;
adata->res[0].end = addr + (ACP3x_REG_END - ACP3x_REG_START);
adata->res[1].name = "acp3x_i2s_irq";
adata->res[1].flags = IORESOURCE_IRQ;
adata->res[1].start = pci->irq;
adata->res[1].end = pci->irq;
adata->acp3x_audio_mode = ACP3x_I2S_MODE;
memset(&pdevinfo, 0, sizeof(pdevinfo));
pdevinfo.name = "acp3x_rv_i2s";
pdevinfo.id = 0;
pdevinfo.parent = &pci->dev;
pdevinfo.num_res = 2;
pdevinfo.res = adata->res;
pdevinfo.data = &irqflags;
pdevinfo.size_data = sizeof(irqflags);
adata->pdev = platform_device_register_full(&pdevinfo);
if (IS_ERR(adata->pdev)) {
dev_err(&pci->dev, "cannot register %s device\n",
pdevinfo.name);
ret = PTR_ERR(adata->pdev);
goto unmap_mmio;
}
break;
default:
dev_err(&pci->dev, "Invalid ACP audio mode : %d\n", val);
ret = -ENODEV;
goto unmap_mmio;
}
return 0;
unmap_mmio:
pci_disable_msi(pci);
iounmap(adata->acp3x_base);
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);
platform_device_unregister(adata->pdev);
iounmap(adata->acp3x_base);
pci_disable_msi(pci);
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");
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