// SPDX-License-Identifier: GPL-2.0+
/*
* AMD Yellow Carp ACP PCI Driver
*
* Copyright 2021 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 <linux/interrupt.h>
#include <sound/pcm_params.h>
#include <linux/pm_runtime.h>
#include "acp6x.h"
struct acp6x_dev_data {
void __iomem *acp6x_base;
struct resource *res;
bool acp6x_audio_mode;
struct platform_device *pdev[ACP6x_DEVS];
};
static int acp6x_power_on(void __iomem *acp_base)
{
u32 val;
int timeout;
val = acp6x_readl(acp_base + ACP_PGFSM_STATUS);
if (!val)
return val;
if ((val & ACP_PGFSM_STATUS_MASK) != ACP_POWER_ON_IN_PROGRESS)
acp6x_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, acp_base + ACP_PGFSM_CONTROL);
timeout = 0;
while (++timeout < 500) {
val = acp6x_readl(acp_base + ACP_PGFSM_STATUS);
if (!val)
return 0;
udelay(1);
}
return -ETIMEDOUT;
}
static int acp6x_reset(void __iomem *acp_base)
{
u32 val;
int timeout;
acp6x_writel(1, acp_base + ACP_SOFT_RESET);
timeout = 0;
while (++timeout < 500) {
val = acp6x_readl(acp_base + ACP_SOFT_RESET);
if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK)
break;
cpu_relax();
}
acp6x_writel(0, acp_base + ACP_SOFT_RESET);
timeout = 0;
while (++timeout < 500) {
val = acp6x_readl(acp_base + ACP_SOFT_RESET);
if (!val)
return 0;
cpu_relax();
}
return -ETIMEDOUT;
}
static void acp6x_enable_interrupts(void __iomem *acp_base)
{
acp6x_writel(0x01, acp_base + ACP_EXTERNAL_INTR_ENB);
}
static void acp6x_disable_interrupts(void __iomem *acp_base)
{
acp6x_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp_base +
ACP_EXTERNAL_INTR_STAT);
acp6x_writel(0x00, acp_base + ACP_EXTERNAL_INTR_CNTL);
acp6x_writel(0x00, acp_base + ACP_EXTERNAL_INTR_ENB);
}
static int acp6x_init(void __iomem *acp_base)
{
int ret;
/* power on */
ret = acp6x_power_on(acp_base);
if (ret) {
pr_err("ACP power on failed\n");
return ret;
}
acp6x_writel(0x01, acp_base + ACP_CONTROL);
/* Reset */
ret = acp6x_reset(acp_base);
if (ret) {
pr_err("ACP reset failed\n");
return ret;
}
acp6x_writel(0x03, acp_base + ACP_CLKMUX_SEL);
acp6x_enable_interrupts(acp_base);
return 0;
}
static int acp6x_deinit(void __iomem *acp_base)
{
int ret;
acp6x_disable_interrupts(acp_base);
/* Reset */
ret = acp6x_reset(acp_base);
if (ret) {
pr_err("ACP reset failed\n");
return ret;
}
acp6x_writel(0x00, acp_base + ACP_CLKMUX_SEL);
acp6x_writel(0x00, acp_base + ACP_CONTROL);
return 0;
}
static irqreturn_t acp6x_irq_handler(int irq, void *dev_id)
{
struct acp6x_dev_data *adata;
struct pdm_dev_data *yc_pdm_data;
u32 val;
adata = dev_id;
if (!adata)
return IRQ_NONE;
val = acp6x_readl(adata->acp6x_base + ACP_EXTERNAL_INTR_STAT);
if (val & BIT(PDM_DMA_STAT)) {
yc_pdm_data = dev_get_drvdata(&adata->pdev[0]->dev);
acp6x_writel(BIT(PDM_DMA_STAT), adata->acp6x_base + ACP_EXTERNAL_INTR_STAT);
if (yc_pdm_data->capture_stream)
snd_pcm_period_elapsed(yc_pdm_data->capture_stream);
return IRQ_HANDLED;
}
return IRQ_NONE;
}
static int snd_acp6x_probe(struct pci_dev *pci,
const struct pci_device_id *pci_id)
{
struct acp6x_dev_data *adata;
struct platform_device_info pdevinfo[ACP6x_DEVS];
int index = 0;
int val = 0x00;
u32 addr;
unsigned int irqflags, flag;
int ret;
irqflags = IRQF_SHARED;
/* Return if acp config flag is defined */
flag = snd_amd_acp_find_config(pci);
if (flag)
return -ENODEV;
/* Yellow Carp device check */
switch (pci->revision) {
case 0x60:
case 0x6f:
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 ACP3x audio");
if (ret < 0) {
dev_err(&pci->dev, "pci_request_regions failed\n");
goto disable_pci;
}
adata = devm_kzalloc(&pci->dev, sizeof(struct acp6x_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);
ret = acp6x_init(adata->acp6x_base);
if (ret)
goto release_regions;
val = acp6x_readl(adata->acp6x_base + ACP_PIN_CONFIG);
switch (val) {
case ACP_CONFIG_0:
case ACP_CONFIG_1:
case ACP_CONFIG_2:
case ACP_CONFIG_3:
case ACP_CONFIG_9:
case ACP_CONFIG_15:
dev_info(&pci->dev, "Audio Mode %d\n", val);
break;
default:
adata->res = devm_kzalloc(&pci->dev,
sizeof(struct resource),
GFP_KERNEL);
if (!adata->res) {
ret = -ENOMEM;
goto de_init;
}
adata->res->name = "acp_iomem";
adata->res->flags = IORESOURCE_MEM;
adata->res->start = addr;
adata->res->end = addr + (ACP6x_REG_END - ACP6x_REG_START);
adata->acp6x_audio_mode = ACP6x_PDM_MODE;
memset(&pdevinfo, 0, sizeof(pdevinfo));
pdevinfo[0].name = "acp_yc_pdm_dma";
pdevinfo[0].id = 0;
pdevinfo[0].parent = &pci->dev;
pdevinfo[0].num_res = 1;
pdevinfo[0].res = adata->res;
pdevinfo[1].name = "dmic-codec";
pdevinfo[1].id = 0;
pdevinfo[1].parent = &pci->dev;
pdevinfo[2].name = "acp_yc_mach";
pdevinfo[2].id = 0;
pdevinfo[2].parent = &pci->dev;
for (index = 0; index < ACP6x_DEVS; index++) {
adata->pdev[index] =
platform_device_register_full(&pdevinfo[index]);
if (IS_ERR(adata->pdev[index])) {
dev_err(&pci->dev, "cannot register %s device\n",
pdevinfo[index].name);
ret = PTR_ERR(adata->pdev[index]);
goto unregister_devs;
}
}
break;
}
ret = devm_request_irq(&pci->dev, pci->irq, acp6x_irq_handler,
irqflags, "ACP_PCI_IRQ", adata);
if (ret) {
dev_err(&pci->dev, "ACP PCI IRQ request failed\n");
goto unregister_devs;
}
pm_runtime_set_autosuspend_delay(&pci->dev, ACP_SUSPEND_DELAY_MS);
pm_runtime_use_autosuspend(&pci->dev);
pm_runtime_put_noidle(&pci->dev);
pm_runtime_allow(&pci->dev);
return 0;
unregister_devs:
for (--index; index >= 0; index--)
platform_device_unregister(adata->pdev[index]);
de_init:
if (acp6x_deinit(adata->acp6x_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 __maybe_unused snd_acp6x_suspend(struct device *dev)
{
struct acp6x_dev_data *adata;
int ret;
adata = dev_get_drvdata(dev);
ret = acp6x_deinit(adata->acp6x_base);
if (ret)
dev_err(dev, "ACP de-init failed\n");
return ret;
}
static int __maybe_unused snd_acp6x_resume(struct device *dev)
{
struct acp6x_dev_data *adata;
int ret;
adata = dev_get_drvdata(dev);
ret = acp6x_init(adata->acp6x_base);
if (ret)
dev_err(dev, "ACP init failed\n");
return ret;
}
static const struct dev_pm_ops acp6x_pm = {
SET_RUNTIME_PM_OPS(snd_acp6x_suspend, snd_acp6x_resume, NULL)
SET_SYSTEM_SLEEP_PM_OPS(snd_acp6x_suspend, snd_acp6x_resume)
};
static void snd_acp6x_remove(struct pci_dev *pci)
{
struct acp6x_dev_data *adata;
int ret, index;
adata = pci_get_drvdata(pci);
if (adata->acp6x_audio_mode == ACP6x_PDM_MODE) {
for (index = 0; index < ACP6x_DEVS; index++)
platform_device_unregister(adata->pdev[index]);
}
ret = acp6x_deinit(adata->acp6x_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_acp6x_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_acp6x_ids);
static struct pci_driver yc_acp6x_driver = {
.name = KBUILD_MODNAME,
.id_table = snd_acp6x_ids,
.probe = snd_acp6x_probe,
.remove = snd_acp6x_remove,
.driver = {
.pm = &acp6x_pm,
}
};
module_pci_driver(yc_acp6x_driver);
MODULE_AUTHOR("[email protected]");
MODULE_DESCRIPTION("AMD ACP Yellow Carp PCI driver");
MODULE_LICENSE("GPL v2");
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