// SPDX-License-Identifier: GPL-2.0+
//
// AMD Vangogh ACP PCI Driver
//
// Copyright (C) 2021, 2023 Advanced Micro Devices, Inc. All rights reserved.
#include <linux/pci.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/pm_runtime.h>
#include "acp5x.h"
#include "../mach-config.h"
struct acp5x_dev_data {
void __iomem *acp5x_base;
bool acp5x_audio_mode;
struct resource *res;
struct platform_device *pdev[ACP5x_DEVS];
};
static int acp5x_power_on(void __iomem *acp5x_base)
{
u32 val;
int timeout;
val = acp_readl(acp5x_base + ACP_PGFSM_STATUS);
if (val == 0)
return val;
if ((val & ACP_PGFSM_STATUS_MASK) !=
ACP_POWER_ON_IN_PROGRESS)
acp_writel(ACP_PGFSM_CNTL_POWER_ON_MASK,
acp5x_base + ACP_PGFSM_CONTROL);
timeout = 0;
while (++timeout < 500) {
val = acp_readl(acp5x_base + ACP_PGFSM_STATUS);
if ((val & ACP_PGFSM_STATUS_MASK) == ACP_POWERED_ON)
return 0;
udelay(1);
}
return -ETIMEDOUT;
}
static int acp5x_reset(void __iomem *acp5x_base)
{
u32 val;
int timeout;
acp_writel(1, acp5x_base + ACP_SOFT_RESET);
timeout = 0;
while (++timeout < 500) {
val = acp_readl(acp5x_base + ACP_SOFT_RESET);
if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK)
break;
cpu_relax();
}
acp_writel(0, acp5x_base + ACP_SOFT_RESET);
timeout = 0;
while (++timeout < 500) {
val = acp_readl(acp5x_base + ACP_SOFT_RESET);
if (!val)
return 0;
cpu_relax();
}
return -ETIMEDOUT;
}
static void acp5x_enable_interrupts(void __iomem *acp5x_base)
{
acp_writel(0x01, acp5x_base + ACP_EXTERNAL_INTR_ENB);
}
static void acp5x_disable_interrupts(void __iomem *acp5x_base)
{
acp_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp5x_base +
ACP_EXTERNAL_INTR_STAT);
acp_writel(0x00, acp5x_base + ACP_EXTERNAL_INTR_CNTL);
acp_writel(0x00, acp5x_base + ACP_EXTERNAL_INTR_ENB);
}
static int acp5x_init(void __iomem *acp5x_base)
{
int ret;
/* power on */
ret = acp5x_power_on(acp5x_base);
if (ret) {
pr_err("ACP5x power on failed\n");
return ret;
}
acp_writel(0x01, acp5x_base + ACP_CONTROL);
/* Reset */
ret = acp5x_reset(acp5x_base);
if (ret) {
pr_err("ACP5x reset failed\n");
return ret;
}
acp_writel(0x03, acp5x_base + ACP_CLKMUX_SEL);
acp5x_enable_interrupts(acp5x_base);
return 0;
}
static int acp5x_deinit(void __iomem *acp5x_base)
{
int ret;
acp5x_disable_interrupts(acp5x_base);
/* Reset */
ret = acp5x_reset(acp5x_base);
if (ret) {
pr_err("ACP5x reset failed\n");
return ret;
}
acp_writel(0x00, acp5x_base + ACP_CLKMUX_SEL);
acp_writel(0x00, acp5x_base + ACP_CONTROL);
return 0;
}
static int snd_acp5x_probe(struct pci_dev *pci,
const struct pci_device_id *pci_id)
{
struct acp5x_dev_data *adata;
struct platform_device_info pdevinfo[ACP5x_DEVS];
unsigned int irqflags, flag;
int ret, i;
u32 addr, val;
/*
* Return if ACP config flag is defined, except when board
* supports SOF while it is not being enabled in kernel config.
*/
flag = snd_amd_acp_find_config(pci);
if (flag != FLAG_AMD_LEGACY &&
(flag != FLAG_AMD_SOF || IS_ENABLED(CONFIG_SND_SOC_SOF_AMD_VANGOGH)))
return -ENODEV;
irqflags = IRQF_SHARED;
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);
ret = acp5x_init(adata->acp5x_base);
if (ret)
goto release_regions;
val = acp_readl(adata->acp5x_base + ACP_PIN_CONFIG);
switch (val) {
case I2S_MODE:
adata->res = devm_kzalloc(&pci->dev,
sizeof(struct resource) * ACP5x_RES,
GFP_KERNEL);
if (!adata->res) {
ret = -ENOMEM;
goto de_init;
}
adata->res[0].name = "acp5x_i2s_iomem";
adata->res[0].flags = IORESOURCE_MEM;
adata->res[0].start = addr;
adata->res[0].end = addr + (ACP5x_REG_END - ACP5x_REG_START);
adata->res[1].name = "acp5x_i2s_sp";
adata->res[1].flags = IORESOURCE_MEM;
adata->res[1].start = addr + ACP5x_I2STDM_REG_START;
adata->res[1].end = addr + ACP5x_I2STDM_REG_END;
adata->res[2].name = "acp5x_i2s_hs";
adata->res[2].flags = IORESOURCE_MEM;
adata->res[2].start = addr + ACP5x_HS_TDM_REG_START;
adata->res[2].end = addr + ACP5x_HS_TDM_REG_END;
adata->res[3].name = "acp5x_i2s_irq";
adata->res[3].flags = IORESOURCE_IRQ;
adata->res[3].start = pci->irq;
adata->res[3].end = adata->res[3].start;
adata->acp5x_audio_mode = ACP5x_I2S_MODE;
memset(&pdevinfo, 0, sizeof(pdevinfo));
pdevinfo[0].name = "acp5x_i2s_dma";
pdevinfo[0].id = 0;
pdevinfo[0].parent = &pci->dev;
pdevinfo[0].num_res = 4;
pdevinfo[0].res = &adata->res[0];
pdevinfo[0].data = &irqflags;
pdevinfo[0].size_data = sizeof(irqflags);
pdevinfo[1].name = "acp5x_i2s_playcap";
pdevinfo[1].id = 0;
pdevinfo[1].parent = &pci->dev;
pdevinfo[1].num_res = 1;
pdevinfo[1].res = &adata->res[1];
pdevinfo[2].name = "acp5x_i2s_playcap";
pdevinfo[2].id = 1;
pdevinfo[2].parent = &pci->dev;
pdevinfo[2].num_res = 1;
pdevinfo[2].res = &adata->res[2];
pdevinfo[3].name = "acp5x_mach";
pdevinfo[3].id = 0;
pdevinfo[3].parent = &pci->dev;
for (i = 0; i < ACP5x_DEVS; i++) {
adata->pdev[i] =
platform_device_register_full(&pdevinfo[i]);
if (IS_ERR(adata->pdev[i])) {
dev_err(&pci->dev, "cannot register %s device\n",
pdevinfo[i].name);
ret = PTR_ERR(adata->pdev[i]);
goto unregister_devs;
}
}
break;
default:
dev_info(&pci->dev, "ACP audio mode : %d\n", val);
}
pm_runtime_set_autosuspend_delay(&pci->dev, 2000);
pm_runtime_use_autosuspend(&pci->dev);
pm_runtime_put_noidle(&pci->dev);
pm_runtime_allow(&pci->dev);
return 0;
unregister_devs:
for (--i; i >= 0; i--)
platform_device_unregister(adata->pdev[i]);
de_init:
if (acp5x_deinit(adata->acp5x_base))
dev_err(&pci->dev, "ACP de-init failed\n");
release_regions:
pci_release_regions(pci);
disable_pci:
pci_disable_device(pci);
return ret;
}
static int snd_acp5x_suspend(struct device *dev)
{
int ret;
struct acp5x_dev_data *adata;
adata = dev_get_drvdata(dev);
ret = acp5x_deinit(adata->acp5x_base);
if (ret)
dev_err(dev, "ACP de-init failed\n");
else
dev_dbg(dev, "ACP de-initialized\n");
return ret;
}
static int snd_acp5x_resume(struct device *dev)
{
int ret;
struct acp5x_dev_data *adata;
adata = dev_get_drvdata(dev);
ret = acp5x_init(adata->acp5x_base);
if (ret) {
dev_err(dev, "ACP init failed\n");
return ret;
}
return 0;
}
static const struct dev_pm_ops acp5x_pm = {
RUNTIME_PM_OPS(snd_acp5x_suspend, snd_acp5x_resume, NULL)
SYSTEM_SLEEP_PM_OPS(snd_acp5x_suspend, snd_acp5x_resume)
};
static void snd_acp5x_remove(struct pci_dev *pci)
{
struct acp5x_dev_data *adata;
int i, ret;
adata = pci_get_drvdata(pci);
if (adata->acp5x_audio_mode == ACP5x_I2S_MODE) {
for (i = 0; i < ACP5x_DEVS; i++)
platform_device_unregister(adata->pdev[i]);
}
ret = acp5x_deinit(adata->acp5x_base);
if (ret)
dev_err(&pci->dev, "ACP de-init failed\n");
pm_runtime_forbid(&pci->dev);
pm_runtime_get_noresume(&pci->dev);
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,
.driver = {
.pm = pm_ptr(&acp5x_pm),
}
};
module_pci_driver(acp5x_driver);
MODULE_AUTHOR("[email protected]");
MODULE_DESCRIPTION("AMD Vangogh ACP PCI driver");
MODULE_LICENSE("GPL v2");
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