[linux-2.6-block.git] / drivers / usb / phy / phy-mxs-usb.c

/*
 * Copyright 2012-2014 Freescale Semiconductor, Inc.
 * Copyright (C) 2012 Marek Vasut <marex@denx.de>
 * on behalf of DENX Software Engineering GmbH
 *
 * The code contained herein is licensed under the GNU General Public
 * License. You may obtain a copy of the GNU General Public License
 * Version 2 or later at the following locations:
 *
 * http://www.opensource.org/licenses/gpl-license.html
 * http://www.gnu.org/copyleft/gpl.html
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/usb/otg.h>
#include <linux/stmp_device.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/of_device.h>
#include <linux/regmap.h>
#include <linux/mfd/syscon.h>

#define DRIVER_NAME "mxs_phy"

#define HW_USBPHY_PWD				0x00
#define HW_USBPHY_CTRL				0x30
#define HW_USBPHY_CTRL_SET			0x34
#define HW_USBPHY_CTRL_CLR			0x38

#define HW_USBPHY_DEBUG_SET			0x54
#define HW_USBPHY_DEBUG_CLR			0x58

#define HW_USBPHY_IP				0x90
#define HW_USBPHY_IP_SET			0x94
#define HW_USBPHY_IP_CLR			0x98

#define BM_USBPHY_CTRL_SFTRST			BIT(31)
#define BM_USBPHY_CTRL_CLKGATE			BIT(30)
#define BM_USBPHY_CTRL_OTG_ID_VALUE		BIT(27)
#define BM_USBPHY_CTRL_ENAUTOSET_USBCLKS	BIT(26)
#define BM_USBPHY_CTRL_ENAUTOCLR_USBCLKGATE	BIT(25)
#define BM_USBPHY_CTRL_ENVBUSCHG_WKUP		BIT(23)
#define BM_USBPHY_CTRL_ENIDCHG_WKUP		BIT(22)
#define BM_USBPHY_CTRL_ENDPDMCHG_WKUP		BIT(21)
#define BM_USBPHY_CTRL_ENAUTOCLR_PHY_PWD	BIT(20)
#define BM_USBPHY_CTRL_ENAUTOCLR_CLKGATE	BIT(19)
#define BM_USBPHY_CTRL_ENAUTO_PWRON_PLL		BIT(18)
#define BM_USBPHY_CTRL_ENUTMILEVEL3		BIT(15)
#define BM_USBPHY_CTRL_ENUTMILEVEL2		BIT(14)
#define BM_USBPHY_CTRL_ENHOSTDISCONDETECT	BIT(1)

#define BM_USBPHY_IP_FIX                       (BIT(17) | BIT(18))

#define BM_USBPHY_DEBUG_CLKGATE			BIT(30)

/* Anatop Registers */
#define ANADIG_ANA_MISC0			0x150
#define ANADIG_ANA_MISC0_SET			0x154
#define ANADIG_ANA_MISC0_CLR			0x158

#define ANADIG_USB1_VBUS_DET_STAT		0x1c0
#define ANADIG_USB2_VBUS_DET_STAT		0x220

#define ANADIG_USB1_LOOPBACK_SET		0x1e4
#define ANADIG_USB1_LOOPBACK_CLR		0x1e8
#define ANADIG_USB2_LOOPBACK_SET		0x244
#define ANADIG_USB2_LOOPBACK_CLR		0x248

#define ANADIG_USB1_MISC			0x1f0
#define ANADIG_USB2_MISC			0x250

#define BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG	BIT(12)
#define BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG_SL BIT(11)

#define BM_ANADIG_USB1_VBUS_DET_STAT_VBUS_VALID	BIT(3)
#define BM_ANADIG_USB2_VBUS_DET_STAT_VBUS_VALID	BIT(3)

#define BM_ANADIG_USB1_LOOPBACK_UTMI_DIG_TST1	BIT(2)
#define BM_ANADIG_USB1_LOOPBACK_TSTI_TX_EN	BIT(5)
#define BM_ANADIG_USB2_LOOPBACK_UTMI_DIG_TST1	BIT(2)
#define BM_ANADIG_USB2_LOOPBACK_TSTI_TX_EN	BIT(5)

#define BM_ANADIG_USB1_MISC_RX_VPIN_FS		BIT(29)
#define BM_ANADIG_USB1_MISC_RX_VMIN_FS		BIT(28)
#define BM_ANADIG_USB2_MISC_RX_VPIN_FS		BIT(29)
#define BM_ANADIG_USB2_MISC_RX_VMIN_FS		BIT(28)

#define to_mxs_phy(p) container_of((p), struct mxs_phy, phy)

/* Do disconnection between PHY and controller without vbus */
#define MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS	BIT(0)

/*
 * The PHY will be in messy if there is a wakeup after putting
 * bus to suspend (set portsc.suspendM) but before setting PHY to low
 * power mode (set portsc.phcd).
 */
#define MXS_PHY_ABNORMAL_IN_SUSPEND		BIT(1)

/*
 * The SOF sends too fast after resuming, it will cause disconnection
 * between host and high speed device.
 */
#define MXS_PHY_SENDING_SOF_TOO_FAST		BIT(2)

/*
 * IC has bug fixes logic, they include
 * MXS_PHY_ABNORMAL_IN_SUSPEND and MXS_PHY_SENDING_SOF_TOO_FAST
 * which are described at above flags, the RTL will handle it
 * according to different versions.
 */
#define MXS_PHY_NEED_IP_FIX			BIT(3)

struct mxs_phy_data {
	unsigned int flags;
};

static const struct mxs_phy_data imx23_phy_data = {
	.flags = MXS_PHY_ABNORMAL_IN_SUSPEND | MXS_PHY_SENDING_SOF_TOO_FAST,
};

static const struct mxs_phy_data imx6q_phy_data = {
	.flags = MXS_PHY_SENDING_SOF_TOO_FAST |
		MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS |
		MXS_PHY_NEED_IP_FIX,
};

static const struct mxs_phy_data imx6sl_phy_data = {
	.flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS |
		MXS_PHY_NEED_IP_FIX,
};

static const struct mxs_phy_data vf610_phy_data = {
	.flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS |
		MXS_PHY_NEED_IP_FIX,
};

static const struct mxs_phy_data imx6sx_phy_data = {
	.flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS,
};

static const struct mxs_phy_data imx6ul_phy_data = {
	.flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS,
};

static const struct of_device_id mxs_phy_dt_ids[] = {
	{ .compatible = "fsl,imx6sx-usbphy", .data = &imx6sx_phy_data, },
	{ .compatible = "fsl,imx6sl-usbphy", .data = &imx6sl_phy_data, },
	{ .compatible = "fsl,imx6q-usbphy", .data = &imx6q_phy_data, },
	{ .compatible = "fsl,imx23-usbphy", .data = &imx23_phy_data, },
	{ .compatible = "fsl,vf610-usbphy", .data = &vf610_phy_data, },
	{ .compatible = "fsl,imx6ul-usbphy", .data = &imx6ul_phy_data, },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, mxs_phy_dt_ids);

struct mxs_phy {
	struct usb_phy phy;
	struct clk *clk;
	const struct mxs_phy_data *data;
	struct regmap *regmap_anatop;
	int port_id;
};

static inline bool is_imx6q_phy(struct mxs_phy *mxs_phy)
{
	return mxs_phy->data == &imx6q_phy_data;
}

static inline bool is_imx6sl_phy(struct mxs_phy *mxs_phy)
{
	return mxs_phy->data == &imx6sl_phy_data;
}

/*
 * PHY needs some 32K cycles to switch from 32K clock to
 * bus (such as AHB/AXI, etc) clock.
 */
static void mxs_phy_clock_switch_delay(void)
{
	usleep_range(300, 400);
}

static int mxs_phy_hw_init(struct mxs_phy *mxs_phy)
{
	int ret;
	void __iomem *base = mxs_phy->phy.io_priv;

	ret = stmp_reset_block(base + HW_USBPHY_CTRL);
	if (ret)
		return ret;

	/* Power up the PHY */
	writel(0, base + HW_USBPHY_PWD);

	/*
	 * USB PHY Ctrl Setting
	 * - Auto clock/power on
	 * - Enable full/low speed support
	 */
	writel(BM_USBPHY_CTRL_ENAUTOSET_USBCLKS |
		BM_USBPHY_CTRL_ENAUTOCLR_USBCLKGATE |
		BM_USBPHY_CTRL_ENAUTOCLR_PHY_PWD |
		BM_USBPHY_CTRL_ENAUTOCLR_CLKGATE |
		BM_USBPHY_CTRL_ENAUTO_PWRON_PLL |
		BM_USBPHY_CTRL_ENUTMILEVEL2 |
		BM_USBPHY_CTRL_ENUTMILEVEL3,
	       base + HW_USBPHY_CTRL_SET);

	if (mxs_phy->data->flags & MXS_PHY_NEED_IP_FIX)
		writel(BM_USBPHY_IP_FIX, base + HW_USBPHY_IP_SET);

	return 0;
}

/* Return true if the vbus is there */
static bool mxs_phy_get_vbus_status(struct mxs_phy *mxs_phy)
{
	unsigned int vbus_value = 0;

	if (!mxs_phy->regmap_anatop)
		return false;

	if (mxs_phy->port_id == 0)
		regmap_read(mxs_phy->regmap_anatop,
			ANADIG_USB1_VBUS_DET_STAT,
			&vbus_value);
	else if (mxs_phy->port_id == 1)
		regmap_read(mxs_phy->regmap_anatop,
			ANADIG_USB2_VBUS_DET_STAT,
			&vbus_value);

	if (vbus_value & BM_ANADIG_USB1_VBUS_DET_STAT_VBUS_VALID)
		return true;
	else
		return false;
}

static void __mxs_phy_disconnect_line(struct mxs_phy *mxs_phy, bool disconnect)
{
	void __iomem *base = mxs_phy->phy.io_priv;
	u32 reg;

	if (disconnect)
		writel_relaxed(BM_USBPHY_DEBUG_CLKGATE,
			base + HW_USBPHY_DEBUG_CLR);

	if (mxs_phy->port_id == 0) {
		reg = disconnect ? ANADIG_USB1_LOOPBACK_SET
			: ANADIG_USB1_LOOPBACK_CLR;
		regmap_write(mxs_phy->regmap_anatop, reg,
			BM_ANADIG_USB1_LOOPBACK_UTMI_DIG_TST1 |
			BM_ANADIG_USB1_LOOPBACK_TSTI_TX_EN);
	} else if (mxs_phy->port_id == 1) {
		reg = disconnect ? ANADIG_USB2_LOOPBACK_SET
			: ANADIG_USB2_LOOPBACK_CLR;
		regmap_write(mxs_phy->regmap_anatop, reg,
			BM_ANADIG_USB2_LOOPBACK_UTMI_DIG_TST1 |
			BM_ANADIG_USB2_LOOPBACK_TSTI_TX_EN);
	}

	if (!disconnect)
		writel_relaxed(BM_USBPHY_DEBUG_CLKGATE,
			base + HW_USBPHY_DEBUG_SET);

	/* Delay some time, and let Linestate be SE0 for controller */
	if (disconnect)
		usleep_range(500, 1000);
}

static bool mxs_phy_is_otg_host(struct mxs_phy *mxs_phy)
{
	void __iomem *base = mxs_phy->phy.io_priv;
	u32 phyctrl = readl(base + HW_USBPHY_CTRL);

	if (IS_ENABLED(CONFIG_USB_OTG) &&
			!(phyctrl & BM_USBPHY_CTRL_OTG_ID_VALUE))
		return true;

	return false;
}

static void mxs_phy_disconnect_line(struct mxs_phy *mxs_phy, bool on)
{
	bool vbus_is_on = false;

	/* If the SoCs don't need to disconnect line without vbus, quit */
	if (!(mxs_phy->data->flags & MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS))
		return;

	/* If the SoCs don't have anatop, quit */
	if (!mxs_phy->regmap_anatop)
		return;

	vbus_is_on = mxs_phy_get_vbus_status(mxs_phy);

	if (on && !vbus_is_on && !mxs_phy_is_otg_host(mxs_phy))
		__mxs_phy_disconnect_line(mxs_phy, true);
	else
		__mxs_phy_disconnect_line(mxs_phy, false);

}

static int mxs_phy_init(struct usb_phy *phy)
{
	int ret;
	struct mxs_phy *mxs_phy = to_mxs_phy(phy);

	mxs_phy_clock_switch_delay();
	ret = clk_prepare_enable(mxs_phy->clk);
	if (ret)
		return ret;

	return mxs_phy_hw_init(mxs_phy);
}

static void mxs_phy_shutdown(struct usb_phy *phy)
{
	struct mxs_phy *mxs_phy = to_mxs_phy(phy);
	u32 value = BM_USBPHY_CTRL_ENVBUSCHG_WKUP |
			BM_USBPHY_CTRL_ENDPDMCHG_WKUP |
			BM_USBPHY_CTRL_ENIDCHG_WKUP |
			BM_USBPHY_CTRL_ENAUTOSET_USBCLKS |
			BM_USBPHY_CTRL_ENAUTOCLR_USBCLKGATE |
			BM_USBPHY_CTRL_ENAUTOCLR_PHY_PWD |
			BM_USBPHY_CTRL_ENAUTOCLR_CLKGATE |
			BM_USBPHY_CTRL_ENAUTO_PWRON_PLL;

	writel(value, phy->io_priv + HW_USBPHY_CTRL_CLR);
	writel(0xffffffff, phy->io_priv + HW_USBPHY_PWD);

	writel(BM_USBPHY_CTRL_CLKGATE,
	       phy->io_priv + HW_USBPHY_CTRL_SET);

	clk_disable_unprepare(mxs_phy->clk);
}

static bool mxs_phy_is_low_speed_connection(struct mxs_phy *mxs_phy)
{
	unsigned int line_state;
	/* bit definition is the same for all controllers */
	unsigned int dp_bit = BM_ANADIG_USB1_MISC_RX_VPIN_FS,
		     dm_bit = BM_ANADIG_USB1_MISC_RX_VMIN_FS;
	unsigned int reg = ANADIG_USB1_MISC;

	/* If the SoCs don't have anatop, quit */
	if (!mxs_phy->regmap_anatop)
		return false;

	if (mxs_phy->port_id == 0)
		reg = ANADIG_USB1_MISC;
	else if (mxs_phy->port_id == 1)
		reg = ANADIG_USB2_MISC;

	regmap_read(mxs_phy->regmap_anatop, reg, &line_state);

	if ((line_state & (dp_bit | dm_bit)) ==  dm_bit)
		return true;
	else
		return false;
}

static int mxs_phy_suspend(struct usb_phy *x, int suspend)
{
	int ret;
	struct mxs_phy *mxs_phy = to_mxs_phy(x);
	bool low_speed_connection, vbus_is_on;

	low_speed_connection = mxs_phy_is_low_speed_connection(mxs_phy);
	vbus_is_on = mxs_phy_get_vbus_status(mxs_phy);

	if (suspend) {
		/*
		 * FIXME: Do not power down RXPWD1PT1 bit for low speed
		 * connect. The low speed connection will have problem at
		 * very rare cases during usb suspend and resume process.
		 */
		if (low_speed_connection & vbus_is_on) {
			/*
			 * If value to be set as pwd value is not 0xffffffff,
			 * several 32Khz cycles are needed.
			 */
			mxs_phy_clock_switch_delay();
			writel(0xffbfffff, x->io_priv + HW_USBPHY_PWD);
		} else {
			writel(0xffffffff, x->io_priv + HW_USBPHY_PWD);
		}
		writel(BM_USBPHY_CTRL_CLKGATE,
		       x->io_priv + HW_USBPHY_CTRL_SET);
		clk_disable_unprepare(mxs_phy->clk);
	} else {
		mxs_phy_clock_switch_delay();
		ret = clk_prepare_enable(mxs_phy->clk);
		if (ret)
			return ret;
		writel(BM_USBPHY_CTRL_CLKGATE,
		       x->io_priv + HW_USBPHY_CTRL_CLR);
		writel(0, x->io_priv + HW_USBPHY_PWD);
	}

	return 0;
}

static int mxs_phy_set_wakeup(struct usb_phy *x, bool enabled)
{
	struct mxs_phy *mxs_phy = to_mxs_phy(x);
	u32 value = BM_USBPHY_CTRL_ENVBUSCHG_WKUP |
			BM_USBPHY_CTRL_ENDPDMCHG_WKUP |
				BM_USBPHY_CTRL_ENIDCHG_WKUP;
	if (enabled) {
		mxs_phy_disconnect_line(mxs_phy, true);
		writel_relaxed(value, x->io_priv + HW_USBPHY_CTRL_SET);
	} else {
		writel_relaxed(value, x->io_priv + HW_USBPHY_CTRL_CLR);
		mxs_phy_disconnect_line(mxs_phy, false);
	}

	return 0;
}

static int mxs_phy_on_connect(struct usb_phy *phy,
		enum usb_device_speed speed)
{
	dev_dbg(phy->dev, "%s device has connected\n",
		(speed == USB_SPEED_HIGH) ? "HS" : "FS/LS");

	if (speed == USB_SPEED_HIGH)
		writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT,
		       phy->io_priv + HW_USBPHY_CTRL_SET);

	return 0;
}

static int mxs_phy_on_disconnect(struct usb_phy *phy,
		enum usb_device_speed speed)
{
	dev_dbg(phy->dev, "%s device has disconnected\n",
		(speed == USB_SPEED_HIGH) ? "HS" : "FS/LS");

	/* Sometimes, the speed is not high speed when the error occurs */
	if (readl(phy->io_priv + HW_USBPHY_CTRL) &
			BM_USBPHY_CTRL_ENHOSTDISCONDETECT)
		writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT,
		       phy->io_priv + HW_USBPHY_CTRL_CLR);

	return 0;
}

static int mxs_phy_probe(struct platform_device *pdev)
{
	struct resource *res;
	void __iomem *base;
	struct clk *clk;
	struct mxs_phy *mxs_phy;
	int ret;
	const struct of_device_id *of_id;
	struct device_node *np = pdev->dev.of_node;

	of_id = of_match_device(mxs_phy_dt_ids, &pdev->dev);
	if (!of_id)
		return -ENODEV;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(base))
		return PTR_ERR(base);

	clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(clk)) {
		dev_err(&pdev->dev,
			"can't get the clock, err=%ld", PTR_ERR(clk));
		return PTR_ERR(clk);
	}

	mxs_phy = devm_kzalloc(&pdev->dev, sizeof(*mxs_phy), GFP_KERNEL);
	if (!mxs_phy)
		return -ENOMEM;

	/* Some SoCs don't have anatop registers */
	if (of_get_property(np, "fsl,anatop", NULL)) {
		mxs_phy->regmap_anatop = syscon_regmap_lookup_by_phandle
			(np, "fsl,anatop");
		if (IS_ERR(mxs_phy->regmap_anatop)) {
			dev_dbg(&pdev->dev,
				"failed to find regmap for anatop\n");
			return PTR_ERR(mxs_phy->regmap_anatop);
		}
	}

	ret = of_alias_get_id(np, "usbphy");
	if (ret < 0)
		dev_dbg(&pdev->dev, "failed to get alias id, errno %d\n", ret);
	mxs_phy->port_id = ret;

	mxs_phy->phy.io_priv		= base;
	mxs_phy->phy.dev		= &pdev->dev;
	mxs_phy->phy.label		= DRIVER_NAME;
	mxs_phy->phy.init		= mxs_phy_init;
	mxs_phy->phy.shutdown		= mxs_phy_shutdown;
	mxs_phy->phy.set_suspend	= mxs_phy_suspend;
	mxs_phy->phy.notify_connect	= mxs_phy_on_connect;
	mxs_phy->phy.notify_disconnect	= mxs_phy_on_disconnect;
	mxs_phy->phy.type		= USB_PHY_TYPE_USB2;
	mxs_phy->phy.set_wakeup		= mxs_phy_set_wakeup;

	mxs_phy->clk = clk;
	mxs_phy->data = of_id->data;

	platform_set_drvdata(pdev, mxs_phy);

	device_set_wakeup_capable(&pdev->dev, true);

	return usb_add_phy_dev(&mxs_phy->phy);
}

static int mxs_phy_remove(struct platform_device *pdev)
{
	struct mxs_phy *mxs_phy = platform_get_drvdata(pdev);

	usb_remove_phy(&mxs_phy->phy);

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static void mxs_phy_enable_ldo_in_suspend(struct mxs_phy *mxs_phy, bool on)
{
	unsigned int reg = on ? ANADIG_ANA_MISC0_SET : ANADIG_ANA_MISC0_CLR;

	/* If the SoCs don't have anatop, quit */
	if (!mxs_phy->regmap_anatop)
		return;

	if (is_imx6q_phy(mxs_phy))
		regmap_write(mxs_phy->regmap_anatop, reg,
			BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG);
	else if (is_imx6sl_phy(mxs_phy))
		regmap_write(mxs_phy->regmap_anatop,
			reg, BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG_SL);
}

static int mxs_phy_system_suspend(struct device *dev)
{
	struct mxs_phy *mxs_phy = dev_get_drvdata(dev);

	if (device_may_wakeup(dev))
		mxs_phy_enable_ldo_in_suspend(mxs_phy, true);

	return 0;
}

static int mxs_phy_system_resume(struct device *dev)
{
	struct mxs_phy *mxs_phy = dev_get_drvdata(dev);

	if (device_may_wakeup(dev))
		mxs_phy_enable_ldo_in_suspend(mxs_phy, false);

	return 0;
}
#endif /* CONFIG_PM_SLEEP */

static SIMPLE_DEV_PM_OPS(mxs_phy_pm, mxs_phy_system_suspend,
		mxs_phy_system_resume);

static struct platform_driver mxs_phy_driver = {
	.probe = mxs_phy_probe,
	.remove = mxs_phy_remove,
	.driver = {
		.name = DRIVER_NAME,
		.of_match_table = mxs_phy_dt_ids,
		.pm = &mxs_phy_pm,
	 },
};

static int __init mxs_phy_module_init(void)
{
	return platform_driver_register(&mxs_phy_driver);
}
postcore_initcall(mxs_phy_module_init);

static void __exit mxs_phy_module_exit(void)
{
	platform_driver_unregister(&mxs_phy_driver);
}
module_exit(mxs_phy_module_exit);

MODULE_ALIAS("platform:mxs-usb-phy");
MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");
MODULE_DESCRIPTION("Freescale MXS USB PHY driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
b3d99681	1	/*
43f3634f	2	* Copyright 2012-2014 Freescale Semiconductor, Inc.
b3d99681 RZ	3	* Copyright (C) 2012 Marek Vasut <marex@denx.de>
	4	* on behalf of DENX Software Engineering GmbH
	5	*
	6	* The code contained herein is licensed under the GNU General Public
	7	* License. You may obtain a copy of the GNU General Public License
	8	* Version 2 or later at the following locations:
	9	*
	10	* http://www.opensource.org/licenses/gpl-license.html
	11	* http://www.gnu.org/copyleft/gpl.html
	12	*/
	13
	14	#include <linux/module.h>
	15	#include <linux/kernel.h>
	16	#include <linux/platform_device.h>
	17	#include <linux/clk.h>
	18	#include <linux/usb/otg.h>
	19	#include <linux/stmp_device.h>
	20	#include <linux/delay.h>
	21	#include <linux/err.h>
	22	#include <linux/io.h>
2400780e	23	#include <linux/of_device.h>
0d896538 PC	24	#include <linux/regmap.h>
0d896538 PC	25	#include <linux/mfd/syscon.h>
b3d99681 RZ	26
	27	#define DRIVER_NAME "mxs_phy"
	28
	29	#define HW_USBPHY_PWD 0x00
	30	#define HW_USBPHY_CTRL 0x30
	31	#define HW_USBPHY_CTRL_SET 0x34
	32	#define HW_USBPHY_CTRL_CLR 0x38
	33
3f126505 PC	34	#define HW_USBPHY_DEBUG_SET 0x54
	35	#define HW_USBPHY_DEBUG_CLR 0x58
	36
22db05ec PC	37	#define HW_USBPHY_IP 0x90
	38	#define HW_USBPHY_IP_SET 0x94
	39	#define HW_USBPHY_IP_CLR 0x98
	40
b3d99681 RZ	41	#define BM_USBPHY_CTRL_SFTRST BIT(31)
b3d99681 RZ	42	#define BM_USBPHY_CTRL_CLKGATE BIT(30)
7b09e676	43	#define BM_USBPHY_CTRL_OTG_ID_VALUE BIT(27)
13644144 PC	44	#define BM_USBPHY_CTRL_ENAUTOSET_USBCLKS BIT(26)
13644144 PC	45	#define BM_USBPHY_CTRL_ENAUTOCLR_USBCLKGATE BIT(25)
3f126505 PC	46	#define BM_USBPHY_CTRL_ENVBUSCHG_WKUP BIT(23)
	47	#define BM_USBPHY_CTRL_ENIDCHG_WKUP BIT(22)
	48	#define BM_USBPHY_CTRL_ENDPDMCHG_WKUP BIT(21)
13644144 PC	49	#define BM_USBPHY_CTRL_ENAUTOCLR_PHY_PWD BIT(20)
	50	#define BM_USBPHY_CTRL_ENAUTOCLR_CLKGATE BIT(19)
	51	#define BM_USBPHY_CTRL_ENAUTO_PWRON_PLL BIT(18)
b3d99681 RZ	52	#define BM_USBPHY_CTRL_ENUTMILEVEL3 BIT(15)
	53	#define BM_USBPHY_CTRL_ENUTMILEVEL2 BIT(14)
	54	#define BM_USBPHY_CTRL_ENHOSTDISCONDETECT BIT(1)
	55
22db05ec PC	56	#define BM_USBPHY_IP_FIX (BIT(17) \| BIT(18))
22db05ec PC	57
3f126505 PC	58	#define BM_USBPHY_DEBUG_CLKGATE BIT(30)
	59
	60	/* Anatop Registers */
bf783438 PC	61	#define ANADIG_ANA_MISC0 0x150
	62	#define ANADIG_ANA_MISC0_SET 0x154
	63	#define ANADIG_ANA_MISC0_CLR 0x158
	64
3f126505 PC	65	#define ANADIG_USB1_VBUS_DET_STAT 0x1c0
	66	#define ANADIG_USB2_VBUS_DET_STAT 0x220
	67
	68	#define ANADIG_USB1_LOOPBACK_SET 0x1e4
	69	#define ANADIG_USB1_LOOPBACK_CLR 0x1e8
	70	#define ANADIG_USB2_LOOPBACK_SET 0x244
	71	#define ANADIG_USB2_LOOPBACK_CLR 0x248
	72
efdbd3a5 PC	73	#define ANADIG_USB1_MISC 0x1f0
	74	#define ANADIG_USB2_MISC 0x250
	75
bf783438 PC	76	#define BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG BIT(12)
	77	#define BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG_SL BIT(11)
	78
3f126505 PC	79	#define BM_ANADIG_USB1_VBUS_DET_STAT_VBUS_VALID BIT(3)
	80	#define BM_ANADIG_USB2_VBUS_DET_STAT_VBUS_VALID BIT(3)
	81
	82	#define BM_ANADIG_USB1_LOOPBACK_UTMI_DIG_TST1 BIT(2)
	83	#define BM_ANADIG_USB1_LOOPBACK_TSTI_TX_EN BIT(5)
	84	#define BM_ANADIG_USB2_LOOPBACK_UTMI_DIG_TST1 BIT(2)
	85	#define BM_ANADIG_USB2_LOOPBACK_TSTI_TX_EN BIT(5)
	86
efdbd3a5 PC	87	#define BM_ANADIG_USB1_MISC_RX_VPIN_FS BIT(29)
	88	#define BM_ANADIG_USB1_MISC_RX_VMIN_FS BIT(28)
	89	#define BM_ANADIG_USB2_MISC_RX_VPIN_FS BIT(29)
	90	#define BM_ANADIG_USB2_MISC_RX_VMIN_FS BIT(28)
	91
2400780e PC	92	#define to_mxs_phy(p) container_of((p), struct mxs_phy, phy)
	93
	94	/* Do disconnection between PHY and controller without vbus */
	95	#define MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS BIT(0)
	96
	97	/*
	98	* The PHY will be in messy if there is a wakeup after putting
	99	* bus to suspend (set portsc.suspendM) but before setting PHY to low
	100	* power mode (set portsc.phcd).
	101	*/
	102	#define MXS_PHY_ABNORMAL_IN_SUSPEND BIT(1)
	103
	104	/*
	105	* The SOF sends too fast after resuming, it will cause disconnection
	106	* between host and high speed device.
	107	*/
	108	#define MXS_PHY_SENDING_SOF_TOO_FAST BIT(2)
	109
22db05ec PC	110	/*
	111	* IC has bug fixes logic, they include
	112	* MXS_PHY_ABNORMAL_IN_SUSPEND and MXS_PHY_SENDING_SOF_TOO_FAST
	113	* which are described at above flags, the RTL will handle it
	114	* according to different versions.
	115	*/
	116	#define MXS_PHY_NEED_IP_FIX BIT(3)
	117
2400780e PC	118	struct mxs_phy_data {
	119	unsigned int flags;
	120	};
	121
	122	static const struct mxs_phy_data imx23_phy_data = {
	123	.flags = MXS_PHY_ABNORMAL_IN_SUSPEND \| MXS_PHY_SENDING_SOF_TOO_FAST,
	124	};
	125
	126	static const struct mxs_phy_data imx6q_phy_data = {
	127	.flags = MXS_PHY_SENDING_SOF_TOO_FAST \|
22db05ec PC	128	MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS \|
22db05ec PC	129	MXS_PHY_NEED_IP_FIX,
2400780e PC	130	};
	131
	132	static const struct mxs_phy_data imx6sl_phy_data = {
22db05ec PC	133	.flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS \|
22db05ec PC	134	MXS_PHY_NEED_IP_FIX,
2400780e PC	135	};
2400780e PC	136
d0ee68b5 SA	137	static const struct mxs_phy_data vf610_phy_data = {
	138	.flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS \|
	139	MXS_PHY_NEED_IP_FIX,
	140	};
	141
43f3634f	142	static const struct mxs_phy_data imx6sx_phy_data = {
dd811ba7	143	.flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS,
43f3634f PC	144	};
43f3634f PC	145
5c256b68 PC	146	static const struct mxs_phy_data imx6ul_phy_data = {
	147	.flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS,
	148	};
	149
2400780e	150	static const struct of_device_id mxs_phy_dt_ids[] = {
43f3634f	151	{ .compatible = "fsl,imx6sx-usbphy", .data = &imx6sx_phy_data, },
2400780e PC	152	{ .compatible = "fsl,imx6sl-usbphy", .data = &imx6sl_phy_data, },
	153	{ .compatible = "fsl,imx6q-usbphy", .data = &imx6q_phy_data, },
	154	{ .compatible = "fsl,imx23-usbphy", .data = &imx23_phy_data, },
d0ee68b5	155	{ .compatible = "fsl,vf610-usbphy", .data = &vf610_phy_data, },
5c256b68	156	{ .compatible = "fsl,imx6ul-usbphy", .data = &imx6ul_phy_data, },
2400780e PC	157	{ /* sentinel */ }
	158	};
	159	MODULE_DEVICE_TABLE(of, mxs_phy_dt_ids);
	160
b3d99681 RZ	161	struct mxs_phy {
	162	struct usb_phy phy;
	163	struct clk *clk;
2400780e	164	const struct mxs_phy_data *data;
0d896538	165	struct regmap *regmap_anatop;
83be181b	166	int port_id;
b3d99681 RZ	167	};
b3d99681 RZ	168
bf783438 PC	169	static inline bool is_imx6q_phy(struct mxs_phy *mxs_phy)
	170	{
	171	return mxs_phy->data == &imx6q_phy_data;
	172	}
	173
	174	static inline bool is_imx6sl_phy(struct mxs_phy *mxs_phy)
	175	{
	176	return mxs_phy->data == &imx6sl_phy_data;
	177	}
	178
47d1845f PC	179	/*
	180	* PHY needs some 32K cycles to switch from 32K clock to
	181	* bus (such as AHB/AXI, etc) clock.
	182	*/
	183	static void mxs_phy_clock_switch_delay(void)
	184	{
	185	usleep_range(300, 400);
	186	}
	187
51e563e3	188	static int mxs_phy_hw_init(struct mxs_phy *mxs_phy)
b3d99681	189	{
51e563e3	190	int ret;
b3d99681 RZ	191	void __iomem *base = mxs_phy->phy.io_priv;
b3d99681 RZ	192
51e563e3 FE	193	ret = stmp_reset_block(base + HW_USBPHY_CTRL);
	194	if (ret)
	195	return ret;
b3d99681 RZ	196
b3d99681 RZ	197	/* Power up the PHY */
b5a726b3	198	writel(0, base + HW_USBPHY_PWD);
b3d99681	199
13644144 PC	200	/*
	201	* USB PHY Ctrl Setting
	202	* - Auto clock/power on
	203	* - Enable full/low speed support
	204	*/
	205	writel(BM_USBPHY_CTRL_ENAUTOSET_USBCLKS \|
	206	BM_USBPHY_CTRL_ENAUTOCLR_USBCLKGATE \|
	207	BM_USBPHY_CTRL_ENAUTOCLR_PHY_PWD \|
	208	BM_USBPHY_CTRL_ENAUTOCLR_CLKGATE \|
	209	BM_USBPHY_CTRL_ENAUTO_PWRON_PLL \|
	210	BM_USBPHY_CTRL_ENUTMILEVEL2 \|
	211	BM_USBPHY_CTRL_ENUTMILEVEL3,
b5a726b3	212	base + HW_USBPHY_CTRL_SET);
51e563e3	213
22db05ec PC	214	if (mxs_phy->data->flags & MXS_PHY_NEED_IP_FIX)
	215	writel(BM_USBPHY_IP_FIX, base + HW_USBPHY_IP_SET);
	216
51e563e3	217	return 0;
b3d99681 RZ	218	}
b3d99681 RZ	219
3f126505 PC	220	/* Return true if the vbus is there */
	221	static bool mxs_phy_get_vbus_status(struct mxs_phy *mxs_phy)
	222	{
63b121e3	223	unsigned int vbus_value = 0;
3f126505	224
543aa486 SW	225	if (!mxs_phy->regmap_anatop)
	226	return false;
	227
3f126505 PC	228	if (mxs_phy->port_id == 0)
	229	regmap_read(mxs_phy->regmap_anatop,
	230	ANADIG_USB1_VBUS_DET_STAT,
	231	&vbus_value);
	232	else if (mxs_phy->port_id == 1)
	233	regmap_read(mxs_phy->regmap_anatop,
	234	ANADIG_USB2_VBUS_DET_STAT,
	235	&vbus_value);
	236
	237	if (vbus_value & BM_ANADIG_USB1_VBUS_DET_STAT_VBUS_VALID)
	238	return true;
	239	else
	240	return false;
	241	}
	242
	243	static void __mxs_phy_disconnect_line(struct mxs_phy *mxs_phy, bool disconnect)
	244	{
	245	void __iomem *base = mxs_phy->phy.io_priv;
	246	u32 reg;
	247
	248	if (disconnect)
	249	writel_relaxed(BM_USBPHY_DEBUG_CLKGATE,
	250	base + HW_USBPHY_DEBUG_CLR);
	251
	252	if (mxs_phy->port_id == 0) {
	253	reg = disconnect ? ANADIG_USB1_LOOPBACK_SET
	254	: ANADIG_USB1_LOOPBACK_CLR;
	255	regmap_write(mxs_phy->regmap_anatop, reg,
	256	BM_ANADIG_USB1_LOOPBACK_UTMI_DIG_TST1 \|
	257	BM_ANADIG_USB1_LOOPBACK_TSTI_TX_EN);
	258	} else if (mxs_phy->port_id == 1) {
	259	reg = disconnect ? ANADIG_USB2_LOOPBACK_SET
	260	: ANADIG_USB2_LOOPBACK_CLR;
	261	regmap_write(mxs_phy->regmap_anatop, reg,
	262	BM_ANADIG_USB2_LOOPBACK_UTMI_DIG_TST1 \|
	263	BM_ANADIG_USB2_LOOPBACK_TSTI_TX_EN);
	264	}
	265
	266	if (!disconnect)
	267	writel_relaxed(BM_USBPHY_DEBUG_CLKGATE,
	268	base + HW_USBPHY_DEBUG_SET);
	269
	270	/* Delay some time, and let Linestate be SE0 for controller */
	271	if (disconnect)
	272	usleep_range(500, 1000);
	273	}
	274
7b09e676 LJ	275	static bool mxs_phy_is_otg_host(struct mxs_phy *mxs_phy)
	276	{
	277	void __iomem *base = mxs_phy->phy.io_priv;
	278	u32 phyctrl = readl(base + HW_USBPHY_CTRL);
	279
	280	if (IS_ENABLED(CONFIG_USB_OTG) &&
	281	!(phyctrl & BM_USBPHY_CTRL_OTG_ID_VALUE))
	282	return true;
	283
	284	return false;
	285	}
	286
3f126505 PC	287	static void mxs_phy_disconnect_line(struct mxs_phy *mxs_phy, bool on)
	288	{
	289	bool vbus_is_on = false;
	290
	291	/* If the SoCs don't need to disconnect line without vbus, quit */
	292	if (!(mxs_phy->data->flags & MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS))
	293	return;
	294
	295	/* If the SoCs don't have anatop, quit */
	296	if (!mxs_phy->regmap_anatop)
	297	return;
	298
	299	vbus_is_on = mxs_phy_get_vbus_status(mxs_phy);
	300
7b09e676	301	if (on && !vbus_is_on && !mxs_phy_is_otg_host(mxs_phy))
3f126505 PC	302	__mxs_phy_disconnect_line(mxs_phy, true);
	303	else
	304	__mxs_phy_disconnect_line(mxs_phy, false);
	305
	306	}
	307
b3d99681 RZ	308	static int mxs_phy_init(struct usb_phy *phy)
b3d99681 RZ	309	{
67c21fc8	310	int ret;
b3d99681 RZ	311	struct mxs_phy *mxs_phy = to_mxs_phy(phy);
b3d99681 RZ	312
47d1845f	313	mxs_phy_clock_switch_delay();
67c21fc8 FE	314	ret = clk_prepare_enable(mxs_phy->clk);
	315	if (ret)
	316	return ret;
	317
51e563e3	318	return mxs_phy_hw_init(mxs_phy);
b3d99681 RZ	319	}
	320
	321	static void mxs_phy_shutdown(struct usb_phy *phy)
	322	{
	323	struct mxs_phy *mxs_phy = to_mxs_phy(phy);
fdf80e78 PC	324	u32 value = BM_USBPHY_CTRL_ENVBUSCHG_WKUP \|
	325	BM_USBPHY_CTRL_ENDPDMCHG_WKUP \|
	326	BM_USBPHY_CTRL_ENIDCHG_WKUP \|
	327	BM_USBPHY_CTRL_ENAUTOSET_USBCLKS \|
	328	BM_USBPHY_CTRL_ENAUTOCLR_USBCLKGATE \|
	329	BM_USBPHY_CTRL_ENAUTOCLR_PHY_PWD \|
	330	BM_USBPHY_CTRL_ENAUTOCLR_CLKGATE \|
	331	BM_USBPHY_CTRL_ENAUTO_PWRON_PLL;
	332
	333	writel(value, phy->io_priv + HW_USBPHY_CTRL_CLR);
	334	writel(0xffffffff, phy->io_priv + HW_USBPHY_PWD);
b3d99681	335
b5a726b3 MKB	336	writel(BM_USBPHY_CTRL_CLKGATE,
b5a726b3 MKB	337	phy->io_priv + HW_USBPHY_CTRL_SET);
b3d99681 RZ	338
	339	clk_disable_unprepare(mxs_phy->clk);
	340	}
	341
efdbd3a5 PC	342	static bool mxs_phy_is_low_speed_connection(struct mxs_phy *mxs_phy)
	343	{
	344	unsigned int line_state;
	345	/* bit definition is the same for all controllers */
	346	unsigned int dp_bit = BM_ANADIG_USB1_MISC_RX_VPIN_FS,
	347	dm_bit = BM_ANADIG_USB1_MISC_RX_VMIN_FS;
	348	unsigned int reg = ANADIG_USB1_MISC;
	349
	350	/* If the SoCs don't have anatop, quit */
	351	if (!mxs_phy->regmap_anatop)
	352	return false;
	353
	354	if (mxs_phy->port_id == 0)
	355	reg = ANADIG_USB1_MISC;
	356	else if (mxs_phy->port_id == 1)
	357	reg = ANADIG_USB2_MISC;
	358
	359	regmap_read(mxs_phy->regmap_anatop, reg, &line_state);
	360
	361	if ((line_state & (dp_bit \| dm_bit)) == dm_bit)
	362	return true;
	363	else
	364	return false;
	365	}
	366
04a6221c PC	367	static int mxs_phy_suspend(struct usb_phy *x, int suspend)
04a6221c PC	368	{
67c21fc8	369	int ret;
04a6221c	370	struct mxs_phy *mxs_phy = to_mxs_phy(x);
efdbd3a5 PC	371	bool low_speed_connection, vbus_is_on;
	372
	373	low_speed_connection = mxs_phy_is_low_speed_connection(mxs_phy);
	374	vbus_is_on = mxs_phy_get_vbus_status(mxs_phy);
04a6221c PC	375
04a6221c PC	376	if (suspend) {
efdbd3a5 PC	377	/*
	378	* FIXME: Do not power down RXPWD1PT1 bit for low speed
	379	* connect. The low speed connection will have problem at
	380	* very rare cases during usb suspend and resume process.
	381	*/
e235f7b8 PC	382	if (low_speed_connection & vbus_is_on) {
	383	/*
	384	* If value to be set as pwd value is not 0xffffffff,
	385	* several 32Khz cycles are needed.
	386	*/
	387	mxs_phy_clock_switch_delay();
	388	writel(0xffbfffff, x->io_priv + HW_USBPHY_PWD);
	389	} else {
efdbd3a5	390	writel(0xffffffff, x->io_priv + HW_USBPHY_PWD);
e235f7b8	391	}
b5a726b3 MKB	392	writel(BM_USBPHY_CTRL_CLKGATE,
b5a726b3 MKB	393	x->io_priv + HW_USBPHY_CTRL_SET);
04a6221c PC	394	clk_disable_unprepare(mxs_phy->clk);
04a6221c PC	395	} else {
47d1845f	396	mxs_phy_clock_switch_delay();
67c21fc8 FE	397	ret = clk_prepare_enable(mxs_phy->clk);
	398	if (ret)
	399	return ret;
b5a726b3 MKB	400	writel(BM_USBPHY_CTRL_CLKGATE,
	401	x->io_priv + HW_USBPHY_CTRL_CLR);
	402	writel(0, x->io_priv + HW_USBPHY_PWD);
04a6221c PC	403	}
	404
	405	return 0;
	406	}
	407
3f126505 PC	408	static int mxs_phy_set_wakeup(struct usb_phy *x, bool enabled)
	409	{
	410	struct mxs_phy *mxs_phy = to_mxs_phy(x);
	411	u32 value = BM_USBPHY_CTRL_ENVBUSCHG_WKUP \|
	412	BM_USBPHY_CTRL_ENDPDMCHG_WKUP \|
	413	BM_USBPHY_CTRL_ENIDCHG_WKUP;
	414	if (enabled) {
	415	mxs_phy_disconnect_line(mxs_phy, true);
	416	writel_relaxed(value, x->io_priv + HW_USBPHY_CTRL_SET);
	417	} else {
	418	writel_relaxed(value, x->io_priv + HW_USBPHY_CTRL_CLR);
	419	mxs_phy_disconnect_line(mxs_phy, false);
	420	}
	421
	422	return 0;
	423	}
	424
ac96511b PC	425	static int mxs_phy_on_connect(struct usb_phy *phy,
ac96511b PC	426	enum usb_device_speed speed)
b3d99681	427	{
f6a15824 PC	428	dev_dbg(phy->dev, "%s device has connected\n",
f6a15824 PC	429	(speed == USB_SPEED_HIGH) ? "HS" : "FS/LS");
b3d99681	430
ac96511b	431	if (speed == USB_SPEED_HIGH)
b5a726b3 MKB	432	writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT,
b5a726b3 MKB	433	phy->io_priv + HW_USBPHY_CTRL_SET);
b3d99681 RZ	434
	435	return 0;
	436	}
	437
ac96511b PC	438	static int mxs_phy_on_disconnect(struct usb_phy *phy,
ac96511b PC	439	enum usb_device_speed speed)
b3d99681	440	{
f6a15824 PC	441	dev_dbg(phy->dev, "%s device has disconnected\n",
f6a15824 PC	442	(speed == USB_SPEED_HIGH) ? "HS" : "FS/LS");
b3d99681	443
f78c0957 PC	444	/* Sometimes, the speed is not high speed when the error occurs */
	445	if (readl(phy->io_priv + HW_USBPHY_CTRL) &
	446	BM_USBPHY_CTRL_ENHOSTDISCONDETECT)
b5a726b3 MKB	447	writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT,
b5a726b3 MKB	448	phy->io_priv + HW_USBPHY_CTRL_CLR);
b3d99681 RZ	449
	450	return 0;
	451	}
	452
	453	static int mxs_phy_probe(struct platform_device *pdev)
	454	{
	455	struct resource *res;
	456	void __iomem *base;
	457	struct clk *clk;
	458	struct mxs_phy *mxs_phy;
25df6397	459	int ret;
89d99aea	460	const struct of_device_id *of_id;
0d896538	461	struct device_node *np = pdev->dev.of_node;
b3d99681	462
89d99aea LC	463	of_id = of_match_device(mxs_phy_dt_ids, &pdev->dev);
	464	if (!of_id)
	465	return -ENODEV;
	466
b3d99681	467	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
148e1134 TR	468	base = devm_ioremap_resource(&pdev->dev, res);
	469	if (IS_ERR(base))
	470	return PTR_ERR(base);
b3d99681 RZ	471
	472	clk = devm_clk_get(&pdev->dev, NULL);
	473	if (IS_ERR(clk)) {
	474	dev_err(&pdev->dev,
	475	"can't get the clock, err=%ld", PTR_ERR(clk));
	476	return PTR_ERR(clk);
	477	}
	478
	479	mxs_phy = devm_kzalloc(&pdev->dev, sizeof(*mxs_phy), GFP_KERNEL);
c62fe556	480	if (!mxs_phy)
b3d99681	481	return -ENOMEM;
b3d99681	482
0d896538 PC	483	/* Some SoCs don't have anatop registers */
	484	if (of_get_property(np, "fsl,anatop", NULL)) {
	485	mxs_phy->regmap_anatop = syscon_regmap_lookup_by_phandle
	486	(np, "fsl,anatop");
	487	if (IS_ERR(mxs_phy->regmap_anatop)) {
	488	dev_dbg(&pdev->dev,
	489	"failed to find regmap for anatop\n");
	490	return PTR_ERR(mxs_phy->regmap_anatop);
	491	}
	492	}
	493
83be181b PC	494	ret = of_alias_get_id(np, "usbphy");
	495	if (ret < 0)
	496	dev_dbg(&pdev->dev, "failed to get alias id, errno %d\n", ret);
	497	mxs_phy->port_id = ret;
	498
b3d99681 RZ	499	mxs_phy->phy.io_priv = base;
	500	mxs_phy->phy.dev = &pdev->dev;
	501	mxs_phy->phy.label = DRIVER_NAME;
	502	mxs_phy->phy.init = mxs_phy_init;
	503	mxs_phy->phy.shutdown = mxs_phy_shutdown;
04a6221c	504	mxs_phy->phy.set_suspend = mxs_phy_suspend;
b3d99681 RZ	505	mxs_phy->phy.notify_connect = mxs_phy_on_connect;
b3d99681 RZ	506	mxs_phy->phy.notify_disconnect = mxs_phy_on_disconnect;
4e0aa635	507	mxs_phy->phy.type = USB_PHY_TYPE_USB2;
3f126505	508	mxs_phy->phy.set_wakeup = mxs_phy_set_wakeup;
b3d99681	509
b3d99681	510	mxs_phy->clk = clk;
2400780e	511	mxs_phy->data = of_id->data;
b3d99681	512
97a27f73	513	platform_set_drvdata(pdev, mxs_phy);
b3d99681	514
bf783438 PC	515	device_set_wakeup_capable(&pdev->dev, true);
bf783438 PC	516
082155ea	517	return usb_add_phy_dev(&mxs_phy->phy);
b3d99681 RZ	518	}
b3d99681 RZ	519
fb4e98ab	520	static int mxs_phy_remove(struct platform_device *pdev)
b3d99681	521	{
25df6397 SH	522	struct mxs_phy *mxs_phy = platform_get_drvdata(pdev);
	523
	524	usb_remove_phy(&mxs_phy->phy);
	525
b3d99681 RZ	526	return 0;
	527	}
	528
bf783438 PC	529	#ifdef CONFIG_PM_SLEEP
	530	static void mxs_phy_enable_ldo_in_suspend(struct mxs_phy *mxs_phy, bool on)
	531	{
	532	unsigned int reg = on ? ANADIG_ANA_MISC0_SET : ANADIG_ANA_MISC0_CLR;
	533
	534	/* If the SoCs don't have anatop, quit */
	535	if (!mxs_phy->regmap_anatop)
	536	return;
	537
	538	if (is_imx6q_phy(mxs_phy))
	539	regmap_write(mxs_phy->regmap_anatop, reg,
	540	BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG);
	541	else if (is_imx6sl_phy(mxs_phy))
	542	regmap_write(mxs_phy->regmap_anatop,
	543	reg, BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG_SL);
	544	}
	545
	546	static int mxs_phy_system_suspend(struct device *dev)
	547	{
	548	struct mxs_phy *mxs_phy = dev_get_drvdata(dev);
	549
	550	if (device_may_wakeup(dev))
	551	mxs_phy_enable_ldo_in_suspend(mxs_phy, true);
	552
	553	return 0;
	554	}
	555
	556	static int mxs_phy_system_resume(struct device *dev)
	557	{
	558	struct mxs_phy *mxs_phy = dev_get_drvdata(dev);
	559
	560	if (device_may_wakeup(dev))
	561	mxs_phy_enable_ldo_in_suspend(mxs_phy, false);
	562
	563	return 0;
	564	}
	565	#endif /* CONFIG_PM_SLEEP */
	566
	567	static SIMPLE_DEV_PM_OPS(mxs_phy_pm, mxs_phy_system_suspend,
	568	mxs_phy_system_resume);
	569
b3d99681 RZ	570	static struct platform_driver mxs_phy_driver = {
b3d99681 RZ	571	.probe = mxs_phy_probe,
7690417d	572	.remove = mxs_phy_remove,
b3d99681 RZ	573	.driver = {
b3d99681 RZ	574	.name = DRIVER_NAME,
b3d99681	575	.of_match_table = mxs_phy_dt_ids,
bf783438	576	.pm = &mxs_phy_pm,
b3d99681 RZ	577	},
	578	};
	579
	580	static int __init mxs_phy_module_init(void)
	581	{
	582	return platform_driver_register(&mxs_phy_driver);
	583	}
	584	postcore_initcall(mxs_phy_module_init);
	585
	586	static void __exit mxs_phy_module_exit(void)
	587	{
	588	platform_driver_unregister(&mxs_phy_driver);
	589	}
	590	module_exit(mxs_phy_module_exit);
	591
	592	MODULE_ALIAS("platform:mxs-usb-phy");
	593	MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
	594	MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");
	595	MODULE_DESCRIPTION("Freescale MXS USB PHY driver");
	596	MODULE_LICENSE("GPL");