[linux-block.git] / drivers / usb / dwc3 / dwc3-imx8mp.c

// SPDX-License-Identifier: GPL-2.0
/*
 * dwc3-imx8mp.c - NXP imx8mp Specific Glue layer
 *
 * Copyright (c) 2020 NXP.
 */

#include <linux/clk.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>

#include "core.h"

/* USB wakeup registers */
#define USB_WAKEUP_CTRL			0x00

/* Global wakeup interrupt enable, also used to clear interrupt */
#define USB_WAKEUP_EN			BIT(31)
/* Wakeup from connect or disconnect, only for superspeed */
#define USB_WAKEUP_SS_CONN		BIT(5)
/* 0 select vbus_valid, 1 select sessvld */
#define USB_WAKEUP_VBUS_SRC_SESS_VAL	BIT(4)
/* Enable signal for wake up from u3 state */
#define USB_WAKEUP_U3_EN		BIT(3)
/* Enable signal for wake up from id change */
#define USB_WAKEUP_ID_EN		BIT(2)
/* Enable signal for wake up from vbus change */
#define	USB_WAKEUP_VBUS_EN		BIT(1)
/* Enable signal for wake up from dp/dm change */
#define USB_WAKEUP_DPDM_EN		BIT(0)

#define USB_WAKEUP_EN_MASK		GENMASK(5, 0)

/* USB glue registers */
#define USB_CTRL0		0x00
#define USB_CTRL1		0x04

#define USB_CTRL0_PORTPWR_EN	BIT(12) /* 1 - PPC enabled (default) */
#define USB_CTRL0_USB3_FIXED	BIT(22) /* 1 - USB3 permanent attached */
#define USB_CTRL0_USB2_FIXED	BIT(23) /* 1 - USB2 permanent attached */

#define USB_CTRL1_OC_POLARITY	BIT(16) /* 0 - HIGH / 1 - LOW */
#define USB_CTRL1_PWR_POLARITY	BIT(17) /* 0 - HIGH / 1 - LOW */

struct dwc3_imx8mp {
	struct device			*dev;
	struct platform_device		*dwc3;
	void __iomem			*hsio_blk_base;
	void __iomem			*glue_base;
	struct clk			*hsio_clk;
	struct clk			*suspend_clk;
	int				irq;
	bool				pm_suspended;
	bool				wakeup_pending;
};

static void imx8mp_configure_glue(struct dwc3_imx8mp *dwc3_imx)
{
	struct device *dev = dwc3_imx->dev;
	u32 value;

	if (!dwc3_imx->glue_base)
		return;

	value = readl(dwc3_imx->glue_base + USB_CTRL0);

	if (device_property_read_bool(dev, "fsl,permanently-attached"))
		value |= (USB_CTRL0_USB2_FIXED | USB_CTRL0_USB3_FIXED);
	else
		value &= ~(USB_CTRL0_USB2_FIXED | USB_CTRL0_USB3_FIXED);

	if (device_property_read_bool(dev, "fsl,disable-port-power-control"))
		value &= ~(USB_CTRL0_PORTPWR_EN);
	else
		value |= USB_CTRL0_PORTPWR_EN;

	writel(value, dwc3_imx->glue_base + USB_CTRL0);

	value = readl(dwc3_imx->glue_base + USB_CTRL1);
	if (device_property_read_bool(dev, "fsl,over-current-active-low"))
		value |= USB_CTRL1_OC_POLARITY;
	else
		value &= ~USB_CTRL1_OC_POLARITY;

	if (device_property_read_bool(dev, "fsl,power-active-low"))
		value |= USB_CTRL1_PWR_POLARITY;
	else
		value &= ~USB_CTRL1_PWR_POLARITY;

	writel(value, dwc3_imx->glue_base + USB_CTRL1);
}

static void dwc3_imx8mp_wakeup_enable(struct dwc3_imx8mp *dwc3_imx)
{
	struct dwc3	*dwc3 = platform_get_drvdata(dwc3_imx->dwc3);
	u32		val;

	if (!dwc3)
		return;

	val = readl(dwc3_imx->hsio_blk_base + USB_WAKEUP_CTRL);

	if ((dwc3->current_dr_role == DWC3_GCTL_PRTCAP_HOST) && dwc3->xhci)
		val |= USB_WAKEUP_EN | USB_WAKEUP_SS_CONN |
		       USB_WAKEUP_U3_EN | USB_WAKEUP_DPDM_EN;
	else if (dwc3->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE)
		val |= USB_WAKEUP_EN | USB_WAKEUP_VBUS_EN |
		       USB_WAKEUP_VBUS_SRC_SESS_VAL;

	writel(val, dwc3_imx->hsio_blk_base + USB_WAKEUP_CTRL);
}

static void dwc3_imx8mp_wakeup_disable(struct dwc3_imx8mp *dwc3_imx)
{
	u32 val;

	val = readl(dwc3_imx->hsio_blk_base + USB_WAKEUP_CTRL);
	val &= ~(USB_WAKEUP_EN | USB_WAKEUP_EN_MASK);
	writel(val, dwc3_imx->hsio_blk_base + USB_WAKEUP_CTRL);
}

static irqreturn_t dwc3_imx8mp_interrupt(int irq, void *_dwc3_imx)
{
	struct dwc3_imx8mp	*dwc3_imx = _dwc3_imx;
	struct dwc3		*dwc = platform_get_drvdata(dwc3_imx->dwc3);

	if (!dwc3_imx->pm_suspended)
		return IRQ_HANDLED;

	disable_irq_nosync(dwc3_imx->irq);
	dwc3_imx->wakeup_pending = true;

	if ((dwc->current_dr_role == DWC3_GCTL_PRTCAP_HOST) && dwc->xhci)
		pm_runtime_resume(&dwc->xhci->dev);
	else if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE)
		pm_runtime_get(dwc->dev);

	return IRQ_HANDLED;
}

static int dwc3_imx8mp_probe(struct platform_device *pdev)
{
	struct device		*dev = &pdev->dev;
	struct device_node	*dwc3_np, *node = dev->of_node;
	struct dwc3_imx8mp	*dwc3_imx;
	struct resource		*res;
	int			err, irq;

	if (!node) {
		dev_err(dev, "device node not found\n");
		return -EINVAL;
	}

	dwc3_imx = devm_kzalloc(dev, sizeof(*dwc3_imx), GFP_KERNEL);
	if (!dwc3_imx)
		return -ENOMEM;

	platform_set_drvdata(pdev, dwc3_imx);

	dwc3_imx->dev = dev;

	dwc3_imx->hsio_blk_base = devm_platform_ioremap_resource(pdev, 0);
	if (IS_ERR(dwc3_imx->hsio_blk_base))
		return PTR_ERR(dwc3_imx->hsio_blk_base);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	if (!res) {
		dev_warn(dev, "Base address for glue layer missing. Continuing without, some features are missing though.");
	} else {
		dwc3_imx->glue_base = devm_ioremap_resource(dev, res);
		if (IS_ERR(dwc3_imx->glue_base))
			return PTR_ERR(dwc3_imx->glue_base);
	}

	dwc3_imx->hsio_clk = devm_clk_get(dev, "hsio");
	if (IS_ERR(dwc3_imx->hsio_clk)) {
		err = PTR_ERR(dwc3_imx->hsio_clk);
		dev_err(dev, "Failed to get hsio clk, err=%d\n", err);
		return err;
	}

	err = clk_prepare_enable(dwc3_imx->hsio_clk);
	if (err) {
		dev_err(dev, "Failed to enable hsio clk, err=%d\n", err);
		return err;
	}

	dwc3_imx->suspend_clk = devm_clk_get(dev, "suspend");
	if (IS_ERR(dwc3_imx->suspend_clk)) {
		err = PTR_ERR(dwc3_imx->suspend_clk);
		dev_err(dev, "Failed to get suspend clk, err=%d\n", err);
		goto disable_hsio_clk;
	}

	err = clk_prepare_enable(dwc3_imx->suspend_clk);
	if (err) {
		dev_err(dev, "Failed to enable suspend clk, err=%d\n", err);
		goto disable_hsio_clk;
	}

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		err = irq;
		goto disable_clks;
	}
	dwc3_imx->irq = irq;

	imx8mp_configure_glue(dwc3_imx);

	pm_runtime_set_active(dev);
	pm_runtime_enable(dev);
	err = pm_runtime_get_sync(dev);
	if (err < 0)
		goto disable_rpm;

	dwc3_np = of_get_compatible_child(node, "snps,dwc3");
	if (!dwc3_np) {
		err = -ENODEV;
		dev_err(dev, "failed to find dwc3 core child\n");
		goto disable_rpm;
	}

	err = of_platform_populate(node, NULL, NULL, dev);
	if (err) {
		dev_err(&pdev->dev, "failed to create dwc3 core\n");
		goto err_node_put;
	}

	dwc3_imx->dwc3 = of_find_device_by_node(dwc3_np);
	if (!dwc3_imx->dwc3) {
		dev_err(dev, "failed to get dwc3 platform device\n");
		err = -ENODEV;
		goto depopulate;
	}
	of_node_put(dwc3_np);

	err = devm_request_threaded_irq(dev, irq, NULL, dwc3_imx8mp_interrupt,
					IRQF_ONESHOT, dev_name(dev), dwc3_imx);
	if (err) {
		dev_err(dev, "failed to request IRQ #%d --> %d\n", irq, err);
		goto depopulate;
	}

	device_set_wakeup_capable(dev, true);
	pm_runtime_put(dev);

	return 0;

depopulate:
	of_platform_depopulate(dev);
err_node_put:
	of_node_put(dwc3_np);
disable_rpm:
	pm_runtime_disable(dev);
	pm_runtime_put_noidle(dev);
disable_clks:
	clk_disable_unprepare(dwc3_imx->suspend_clk);
disable_hsio_clk:
	clk_disable_unprepare(dwc3_imx->hsio_clk);

	return err;
}

static int dwc3_imx8mp_remove(struct platform_device *pdev)
{
	struct dwc3_imx8mp *dwc3_imx = platform_get_drvdata(pdev);
	struct device *dev = &pdev->dev;

	pm_runtime_get_sync(dev);
	of_platform_depopulate(dev);

	clk_disable_unprepare(dwc3_imx->suspend_clk);
	clk_disable_unprepare(dwc3_imx->hsio_clk);

	pm_runtime_disable(dev);
	pm_runtime_put_noidle(dev);
	platform_set_drvdata(pdev, NULL);

	return 0;
}

static int __maybe_unused dwc3_imx8mp_suspend(struct dwc3_imx8mp *dwc3_imx,
					      pm_message_t msg)
{
	if (dwc3_imx->pm_suspended)
		return 0;

	/* Wakeup enable */
	if (PMSG_IS_AUTO(msg) || device_may_wakeup(dwc3_imx->dev))
		dwc3_imx8mp_wakeup_enable(dwc3_imx);

	dwc3_imx->pm_suspended = true;

	return 0;
}

static int __maybe_unused dwc3_imx8mp_resume(struct dwc3_imx8mp *dwc3_imx,
					     pm_message_t msg)
{
	struct dwc3	*dwc = platform_get_drvdata(dwc3_imx->dwc3);
	int ret = 0;

	if (!dwc3_imx->pm_suspended)
		return 0;

	/* Wakeup disable */
	dwc3_imx8mp_wakeup_disable(dwc3_imx);
	dwc3_imx->pm_suspended = false;

	/* Upon power loss any previous configuration is lost, restore it */
	imx8mp_configure_glue(dwc3_imx);

	if (dwc3_imx->wakeup_pending) {
		dwc3_imx->wakeup_pending = false;
		if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE) {
			pm_runtime_mark_last_busy(dwc->dev);
			pm_runtime_put_autosuspend(dwc->dev);
		} else {
			/*
			 * Add wait for xhci switch from suspend
			 * clock to normal clock to detect connection.
			 */
			usleep_range(9000, 10000);
		}
		enable_irq(dwc3_imx->irq);
	}

	return ret;
}

static int __maybe_unused dwc3_imx8mp_pm_suspend(struct device *dev)
{
	struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev);
	int ret;

	ret = dwc3_imx8mp_suspend(dwc3_imx, PMSG_SUSPEND);

	if (device_may_wakeup(dwc3_imx->dev))
		enable_irq_wake(dwc3_imx->irq);
	else
		clk_disable_unprepare(dwc3_imx->suspend_clk);

	clk_disable_unprepare(dwc3_imx->hsio_clk);
	dev_dbg(dev, "dwc3 imx8mp pm suspend.\n");

	return ret;
}

static int __maybe_unused dwc3_imx8mp_pm_resume(struct device *dev)
{
	struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev);
	int ret;

	if (device_may_wakeup(dwc3_imx->dev)) {
		disable_irq_wake(dwc3_imx->irq);
	} else {
		ret = clk_prepare_enable(dwc3_imx->suspend_clk);
		if (ret)
			return ret;
	}

	ret = clk_prepare_enable(dwc3_imx->hsio_clk);
	if (ret)
		return ret;

	ret = dwc3_imx8mp_resume(dwc3_imx, PMSG_RESUME);

	pm_runtime_disable(dev);
	pm_runtime_set_active(dev);
	pm_runtime_enable(dev);

	dev_dbg(dev, "dwc3 imx8mp pm resume.\n");

	return ret;
}

static int __maybe_unused dwc3_imx8mp_runtime_suspend(struct device *dev)
{
	struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev);

	dev_dbg(dev, "dwc3 imx8mp runtime suspend.\n");

	return dwc3_imx8mp_suspend(dwc3_imx, PMSG_AUTO_SUSPEND);
}

static int __maybe_unused dwc3_imx8mp_runtime_resume(struct device *dev)
{
	struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev);

	dev_dbg(dev, "dwc3 imx8mp runtime resume.\n");

	return dwc3_imx8mp_resume(dwc3_imx, PMSG_AUTO_RESUME);
}

static const struct dev_pm_ops dwc3_imx8mp_dev_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(dwc3_imx8mp_pm_suspend, dwc3_imx8mp_pm_resume)
	SET_RUNTIME_PM_OPS(dwc3_imx8mp_runtime_suspend,
			   dwc3_imx8mp_runtime_resume, NULL)
};

static const struct of_device_id dwc3_imx8mp_of_match[] = {
	{ .compatible = "fsl,imx8mp-dwc3", },
	{},
};
MODULE_DEVICE_TABLE(of, dwc3_imx8mp_of_match);

static struct platform_driver dwc3_imx8mp_driver = {
	.probe		= dwc3_imx8mp_probe,
	.remove		= dwc3_imx8mp_remove,
	.driver		= {
		.name	= "imx8mp-dwc3",
		.pm	= &dwc3_imx8mp_dev_pm_ops,
		.of_match_table	= dwc3_imx8mp_of_match,
	},
};

module_platform_driver(dwc3_imx8mp_driver);

MODULE_ALIAS("platform:imx8mp-dwc3");
MODULE_AUTHOR("jun.li@nxp.com");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("DesignWare USB3 imx8mp Glue Layer");
Commit	Line	Data
6dd25659	1	// SPDX-License-Identifier: GPL-2.0
ed577c32	2	/*
6dd25659 LJ	3	* dwc3-imx8mp.c - NXP imx8mp Specific Glue layer
	4	*
	5	* Copyright (c) 2020 NXP.
	6	*/
	7
	8	#include <linux/clk.h>
	9	#include <linux/interrupt.h>
	10	#include <linux/io.h>
	11	#include <linux/kernel.h>
	12	#include <linux/module.h>
	13	#include <linux/of_platform.h>
	14	#include <linux/platform_device.h>
	15	#include <linux/pm_runtime.h>
	16
	17	#include "core.h"
	18
	19	/* USB wakeup registers */
	20	#define USB_WAKEUP_CTRL 0x00
	21
	22	/* Global wakeup interrupt enable, also used to clear interrupt */
	23	#define USB_WAKEUP_EN BIT(31)
	24	/* Wakeup from connect or disconnect, only for superspeed */
	25	#define USB_WAKEUP_SS_CONN BIT(5)
	26	/* 0 select vbus_valid, 1 select sessvld */
	27	#define USB_WAKEUP_VBUS_SRC_SESS_VAL BIT(4)
	28	/* Enable signal for wake up from u3 state */
	29	#define USB_WAKEUP_U3_EN BIT(3)
	30	/* Enable signal for wake up from id change */
	31	#define USB_WAKEUP_ID_EN BIT(2)
	32	/* Enable signal for wake up from vbus change */
	33	#define USB_WAKEUP_VBUS_EN BIT(1)
	34	/* Enable signal for wake up from dp/dm change */
	35	#define USB_WAKEUP_DPDM_EN BIT(0)
	36
	37	#define USB_WAKEUP_EN_MASK GENMASK(5, 0)
	38
9d521071 AS	39	/* USB glue registers */
	40	#define USB_CTRL0 0x00
	41	#define USB_CTRL1 0x04
	42
	43	#define USB_CTRL0_PORTPWR_EN BIT(12) /* 1 - PPC enabled (default) */
	44	#define USB_CTRL0_USB3_FIXED BIT(22) /* 1 - USB3 permanent attached */
	45	#define USB_CTRL0_USB2_FIXED BIT(23) /* 1 - USB2 permanent attached */
	46
	47	#define USB_CTRL1_OC_POLARITY BIT(16) /* 0 - HIGH / 1 - LOW */
	48	#define USB_CTRL1_PWR_POLARITY BIT(17) /* 0 - HIGH / 1 - LOW */
	49
6dd25659 LJ	50	struct dwc3_imx8mp {
	51	struct device *dev;
	52	struct platform_device *dwc3;
81915384	53	void __iomem *hsio_blk_base;
9d521071	54	void __iomem *glue_base;
6dd25659 LJ	55	struct clk *hsio_clk;
	56	struct clk *suspend_clk;
	57	int irq;
	58	bool pm_suspended;
	59	bool wakeup_pending;
	60	};
	61
9d521071 AS	62	static void imx8mp_configure_glue(struct dwc3_imx8mp *dwc3_imx)
	63	{
	64	struct device *dev = dwc3_imx->dev;
	65	u32 value;
	66
	67	if (!dwc3_imx->glue_base)
	68	return;
	69
	70	value = readl(dwc3_imx->glue_base + USB_CTRL0);
	71
	72	if (device_property_read_bool(dev, "fsl,permanently-attached"))
	73	value \|= (USB_CTRL0_USB2_FIXED \| USB_CTRL0_USB3_FIXED);
	74	else
	75	value &= ~(USB_CTRL0_USB2_FIXED \| USB_CTRL0_USB3_FIXED);
	76
	77	if (device_property_read_bool(dev, "fsl,disable-port-power-control"))
	78	value &= ~(USB_CTRL0_PORTPWR_EN);
	79	else
	80	value \|= USB_CTRL0_PORTPWR_EN;
	81
	82	writel(value, dwc3_imx->glue_base + USB_CTRL0);
	83
	84	value = readl(dwc3_imx->glue_base + USB_CTRL1);
	85	if (device_property_read_bool(dev, "fsl,over-current-active-low"))
	86	value \|= USB_CTRL1_OC_POLARITY;
	87	else
	88	value &= ~USB_CTRL1_OC_POLARITY;
	89
	90	if (device_property_read_bool(dev, "fsl,power-active-low"))
	91	value \|= USB_CTRL1_PWR_POLARITY;
	92	else
	93	value &= ~USB_CTRL1_PWR_POLARITY;
	94
	95	writel(value, dwc3_imx->glue_base + USB_CTRL1);
	96	}
	97
6dd25659 LJ	98	static void dwc3_imx8mp_wakeup_enable(struct dwc3_imx8mp *dwc3_imx)
	99	{
	100	struct dwc3 *dwc3 = platform_get_drvdata(dwc3_imx->dwc3);
	101	u32 val;
	102
	103	if (!dwc3)
	104	return;
	105
81915384	106	val = readl(dwc3_imx->hsio_blk_base + USB_WAKEUP_CTRL);
6dd25659 LJ	107
	108	if ((dwc3->current_dr_role == DWC3_GCTL_PRTCAP_HOST) && dwc3->xhci)
	109	val \|= USB_WAKEUP_EN \| USB_WAKEUP_SS_CONN \|
	110	USB_WAKEUP_U3_EN \| USB_WAKEUP_DPDM_EN;
	111	else if (dwc3->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE)
	112	val \|= USB_WAKEUP_EN \| USB_WAKEUP_VBUS_EN \|
	113	USB_WAKEUP_VBUS_SRC_SESS_VAL;
	114
81915384	115	writel(val, dwc3_imx->hsio_blk_base + USB_WAKEUP_CTRL);
6dd25659 LJ	116	}
	117
	118	static void dwc3_imx8mp_wakeup_disable(struct dwc3_imx8mp *dwc3_imx)
	119	{
	120	u32 val;
	121
81915384	122	val = readl(dwc3_imx->hsio_blk_base + USB_WAKEUP_CTRL);
6dd25659	123	val &= ~(USB_WAKEUP_EN \| USB_WAKEUP_EN_MASK);
81915384	124	writel(val, dwc3_imx->hsio_blk_base + USB_WAKEUP_CTRL);
6dd25659 LJ	125	}
	126
	127	static irqreturn_t dwc3_imx8mp_interrupt(int irq, void *_dwc3_imx)
	128	{
	129	struct dwc3_imx8mp *dwc3_imx = _dwc3_imx;
	130	struct dwc3 *dwc = platform_get_drvdata(dwc3_imx->dwc3);
	131
	132	if (!dwc3_imx->pm_suspended)
	133	return IRQ_HANDLED;
	134
	135	disable_irq_nosync(dwc3_imx->irq);
	136	dwc3_imx->wakeup_pending = true;
	137
	138	if ((dwc->current_dr_role == DWC3_GCTL_PRTCAP_HOST) && dwc->xhci)
	139	pm_runtime_resume(&dwc->xhci->dev);
	140	else if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE)
	141	pm_runtime_get(dwc->dev);
	142
	143	return IRQ_HANDLED;
	144	}
	145
	146	static int dwc3_imx8mp_probe(struct platform_device *pdev)
	147	{
	148	struct device *dev = &pdev->dev;
	149	struct device_node dwc3_np, node = dev->of_node;
	150	struct dwc3_imx8mp *dwc3_imx;
9d521071	151	struct resource *res;
6dd25659 LJ	152	int err, irq;
	153
	154	if (!node) {
	155	dev_err(dev, "device node not found\n");
	156	return -EINVAL;
	157	}
	158
	159	dwc3_imx = devm_kzalloc(dev, sizeof(*dwc3_imx), GFP_KERNEL);
	160	if (!dwc3_imx)
	161	return -ENOMEM;
	162
	163	platform_set_drvdata(pdev, dwc3_imx);
	164
	165	dwc3_imx->dev = dev;
	166
81915384 AS	167	dwc3_imx->hsio_blk_base = devm_platform_ioremap_resource(pdev, 0);
	168	if (IS_ERR(dwc3_imx->hsio_blk_base))
	169	return PTR_ERR(dwc3_imx->hsio_blk_base);
6dd25659	170
9d521071 AS	171	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	172	if (!res) {
	173	dev_warn(dev, "Base address for glue layer missing. Continuing without, some features are missing though.");
	174	} else {
	175	dwc3_imx->glue_base = devm_ioremap_resource(dev, res);
	176	if (IS_ERR(dwc3_imx->glue_base))
	177	return PTR_ERR(dwc3_imx->glue_base);
	178	}
	179
6dd25659 LJ	180	dwc3_imx->hsio_clk = devm_clk_get(dev, "hsio");
	181	if (IS_ERR(dwc3_imx->hsio_clk)) {
	182	err = PTR_ERR(dwc3_imx->hsio_clk);
	183	dev_err(dev, "Failed to get hsio clk, err=%d\n", err);
	184	return err;
	185	}
	186
	187	err = clk_prepare_enable(dwc3_imx->hsio_clk);
	188	if (err) {
	189	dev_err(dev, "Failed to enable hsio clk, err=%d\n", err);
	190	return err;
	191	}
	192
	193	dwc3_imx->suspend_clk = devm_clk_get(dev, "suspend");
	194	if (IS_ERR(dwc3_imx->suspend_clk)) {
	195	err = PTR_ERR(dwc3_imx->suspend_clk);
	196	dev_err(dev, "Failed to get suspend clk, err=%d\n", err);
	197	goto disable_hsio_clk;
	198	}
	199
	200	err = clk_prepare_enable(dwc3_imx->suspend_clk);
	201	if (err) {
	202	dev_err(dev, "Failed to enable suspend clk, err=%d\n", err);
	203	goto disable_hsio_clk;
	204	}
	205
	206	irq = platform_get_irq(pdev, 0);
	207	if (irq < 0) {
	208	err = irq;
	209	goto disable_clks;
	210	}
	211	dwc3_imx->irq = irq;
	212
9d521071 AS	213	imx8mp_configure_glue(dwc3_imx);
9d521071 AS	214
6dd25659 LJ	215	pm_runtime_set_active(dev);
	216	pm_runtime_enable(dev);
	217	err = pm_runtime_get_sync(dev);
	218	if (err < 0)
	219	goto disable_rpm;
	220
b9699208	221	dwc3_np = of_get_compatible_child(node, "snps,dwc3");
6dd25659	222	if (!dwc3_np) {
0b2b149e	223	err = -ENODEV;
6dd25659 LJ	224	dev_err(dev, "failed to find dwc3 core child\n");
	225	goto disable_rpm;
	226	}
	227
	228	err = of_platform_populate(node, NULL, NULL, dev);
	229	if (err) {
	230	dev_err(&pdev->dev, "failed to create dwc3 core\n");
	231	goto err_node_put;
	232	}
	233
	234	dwc3_imx->dwc3 = of_find_device_by_node(dwc3_np);
	235	if (!dwc3_imx->dwc3) {
	236	dev_err(dev, "failed to get dwc3 platform device\n");
	237	err = -ENODEV;
	238	goto depopulate;
	239	}
	240	of_node_put(dwc3_np);
	241
6a48d0ae NL	242	err = devm_request_threaded_irq(dev, irq, NULL, dwc3_imx8mp_interrupt,
	243	IRQF_ONESHOT, dev_name(dev), dwc3_imx);
	244	if (err) {
	245	dev_err(dev, "failed to request IRQ #%d --> %d\n", irq, err);
	246	goto depopulate;
	247	}
	248
6dd25659 LJ	249	device_set_wakeup_capable(dev, true);
	250	pm_runtime_put(dev);
	251
	252	return 0;
	253
	254	depopulate:
	255	of_platform_depopulate(dev);
	256	err_node_put:
	257	of_node_put(dwc3_np);
	258	disable_rpm:
	259	pm_runtime_disable(dev);
	260	pm_runtime_put_noidle(dev);
	261	disable_clks:
	262	clk_disable_unprepare(dwc3_imx->suspend_clk);
	263	disable_hsio_clk:
	264	clk_disable_unprepare(dwc3_imx->hsio_clk);
	265
	266	return err;
	267	}
	268
	269	static int dwc3_imx8mp_remove(struct platform_device *pdev)
	270	{
	271	struct dwc3_imx8mp *dwc3_imx = platform_get_drvdata(pdev);
	272	struct device *dev = &pdev->dev;
	273
	274	pm_runtime_get_sync(dev);
	275	of_platform_depopulate(dev);
	276
	277	clk_disable_unprepare(dwc3_imx->suspend_clk);
	278	clk_disable_unprepare(dwc3_imx->hsio_clk);
	279
	280	pm_runtime_disable(dev);
	281	pm_runtime_put_noidle(dev);
	282	platform_set_drvdata(pdev, NULL);
	283
	284	return 0;
	285	}
	286
	287	static int __maybe_unused dwc3_imx8mp_suspend(struct dwc3_imx8mp *dwc3_imx,
	288	pm_message_t msg)
	289	{
	290	if (dwc3_imx->pm_suspended)
	291	return 0;
	292
	293	/* Wakeup enable */
	294	if (PMSG_IS_AUTO(msg) \|\| device_may_wakeup(dwc3_imx->dev))
	295	dwc3_imx8mp_wakeup_enable(dwc3_imx);
	296
	297	dwc3_imx->pm_suspended = true;
	298
	299	return 0;
	300	}
	301
	302	static int __maybe_unused dwc3_imx8mp_resume(struct dwc3_imx8mp *dwc3_imx,
	303	pm_message_t msg)
	304	{
	305	struct dwc3 *dwc = platform_get_drvdata(dwc3_imx->dwc3);
	306	int ret = 0;
	307
	308	if (!dwc3_imx->pm_suspended)
	309	return 0;
	310
	311	/* Wakeup disable */
	312	dwc3_imx8mp_wakeup_disable(dwc3_imx);
313	dwc3_imx->pm_suspended = false;
314
9d521071 AS	315	/* Upon power loss any previous configuration is lost, restore it */
	316	imx8mp_configure_glue(dwc3_imx);
	317
6dd25659 LJ	318	if (dwc3_imx->wakeup_pending) {
	319	dwc3_imx->wakeup_pending = false;
	320	if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE) {
	321	pm_runtime_mark_last_busy(dwc->dev);
	322	pm_runtime_put_autosuspend(dwc->dev);
	323	} else {
	324	/*
	325	* Add wait for xhci switch from suspend
	326	* clock to normal clock to detect connection.
	327	*/
	328	usleep_range(9000, 10000);
	329	}
	330	enable_irq(dwc3_imx->irq);
	331	}
	332
	333	return ret;
	334	}
	335
	336	static int __maybe_unused dwc3_imx8mp_pm_suspend(struct device *dev)
	337	{
	338	struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev);
	339	int ret;
	340
	341	ret = dwc3_imx8mp_suspend(dwc3_imx, PMSG_SUSPEND);
	342
	343	if (device_may_wakeup(dwc3_imx->dev))
	344	enable_irq_wake(dwc3_imx->irq);
	345	else
	346	clk_disable_unprepare(dwc3_imx->suspend_clk);
	347
	348	clk_disable_unprepare(dwc3_imx->hsio_clk);
	349	dev_dbg(dev, "dwc3 imx8mp pm suspend.\n");
	350
	351	return ret;
	352	}
	353
	354	static int __maybe_unused dwc3_imx8mp_pm_resume(struct device *dev)
	355	{
	356	struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev);
	357	int ret;
	358
	359	if (device_may_wakeup(dwc3_imx->dev)) {
	360	disable_irq_wake(dwc3_imx->irq);
	361	} else {
	362	ret = clk_prepare_enable(dwc3_imx->suspend_clk);
	363	if (ret)
	364	return ret;
	365	}
	366
	367	ret = clk_prepare_enable(dwc3_imx->hsio_clk);
	368	if (ret)
	369	return ret;
	370
	371	ret = dwc3_imx8mp_resume(dwc3_imx, PMSG_RESUME);
	372
	373	pm_runtime_disable(dev);
	374	pm_runtime_set_active(dev);
	375	pm_runtime_enable(dev);
	376
	377	dev_dbg(dev, "dwc3 imx8mp pm resume.\n");
	378
	379	return ret;
	380	}
	381
382	static int __maybe_unused dwc3_imx8mp_runtime_suspend(struct device *dev)
383	{
384	struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev);
385
386	dev_dbg(dev, "dwc3 imx8mp runtime suspend.\n");
387
388	return dwc3_imx8mp_suspend(dwc3_imx, PMSG_AUTO_SUSPEND);
389	}
390
391	static int __maybe_unused dwc3_imx8mp_runtime_resume(struct device *dev)
392	{
393	struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev);
394
395	dev_dbg(dev, "dwc3 imx8mp runtime resume.\n");
396
397	return dwc3_imx8mp_resume(dwc3_imx, PMSG_AUTO_RESUME);
398	}
399
400	static const struct dev_pm_ops dwc3_imx8mp_dev_pm_ops = {
401	SET_SYSTEM_SLEEP_PM_OPS(dwc3_imx8mp_pm_suspend, dwc3_imx8mp_pm_resume)
402	SET_RUNTIME_PM_OPS(dwc3_imx8mp_runtime_suspend,
403	dwc3_imx8mp_runtime_resume, NULL)
404	};
405
406	static const struct of_device_id dwc3_imx8mp_of_match[] = {
407	{ .compatible = "fsl,imx8mp-dwc3", },
408	{},
409	};
410	MODULE_DEVICE_TABLE(of, dwc3_imx8mp_of_match);
411
412	static struct platform_driver dwc3_imx8mp_driver = {
413	.probe = dwc3_imx8mp_probe,
414	.remove = dwc3_imx8mp_remove,
415	.driver = {
416	.name = "imx8mp-dwc3",
417	.pm = &dwc3_imx8mp_dev_pm_ops,
418	.of_match_table = dwc3_imx8mp_of_match,
419	},
420	};
421
422	module_platform_driver(dwc3_imx8mp_driver);
423
424	MODULE_ALIAS("platform:imx8mp-dwc3");
425	MODULE_AUTHOR("jun.li@nxp.com");
426	MODULE_LICENSE("GPL v2");
427	MODULE_DESCRIPTION("DesignWare USB3 imx8mp Glue Layer");