sound/soc/amd/vangogh/pci-acp5x.c - linux - Git at Google

 // 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("Vijendar.Mukunda@amd.com");
 MODULE_DESCRIPTION("AMD Vangogh ACP PCI driver");
 MODULE_LICENSE("GPL v2");
	// 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("Vijendar.Mukunda@amd.com");
	MODULE_DESCRIPTION("AMD Vangogh ACP PCI driver");
	MODULE_LICENSE("GPL v2");