// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright 2012 Freescale Semiconductor, Inc.
 */

#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/usb/otg.h>

#include "ci_hdrc_imx.h"

#define MX25_USB_PHY_CTRL_OFFSET        0x08
#define MX25_BM_EXTERNAL_VBUS_DIVIDER   BIT(23)

#define MX25_EHCI_INTERFACE_SINGLE_UNI  (2 << 0)
#define MX25_EHCI_INTERFACE_DIFF_UNI    (0 << 0)
#define MX25_EHCI_INTERFACE_MASK        (0xf)

#define MX25_OTG_SIC_SHIFT              29
#define MX25_OTG_SIC_MASK               (0x3 << MX25_OTG_SIC_SHIFT)
#define MX25_OTG_PM_BIT                 BIT(24)
#define MX25_OTG_PP_BIT                 BIT(11)
#define MX25_OTG_OCPOL_BIT              BIT(3)

#define MX25_H1_SIC_SHIFT               21
#define MX25_H1_SIC_MASK                (0x3 << MX25_H1_SIC_SHIFT)
#define MX25_H1_PP_BIT                  BIT(18)
#define MX25_H1_PM_BIT                  BIT(16)
#define MX25_H1_IPPUE_UP_BIT            BIT(7)
#define MX25_H1_IPPUE_DOWN_BIT          BIT(6)
#define MX25_H1_TLL_BIT                 BIT(5)
#define MX25_H1_USBTE_BIT               BIT(4)
#define MX25_H1_OCPOL_BIT               BIT(2)

#define MX27_H1_PM_BIT                  BIT(8)
#define MX27_H2_PM_BIT                  BIT(16)
#define MX27_OTG_PM_BIT                 BIT(24)

#define MX53_USB_OTG_PHY_CTRL_0_OFFSET  0x08
#define MX53_USB_OTG_PHY_CTRL_1_OFFSET  0x0c
#define MX53_USB_CTRL_1_OFFSET          0x10
#define MX53_USB_CTRL_1_H2_XCVR_CLK_SEL_MASK (0x11 << 2)
#define MX53_USB_CTRL_1_H2_XCVR_CLK_SEL_ULPI BIT(2)
#define MX53_USB_CTRL_1_H3_XCVR_CLK_SEL_MASK (0x11 << 6)
#define MX53_USB_CTRL_1_H3_XCVR_CLK_SEL_ULPI BIT(6)
#define MX53_USB_UH2_CTRL_OFFSET        0x14
#define MX53_USB_UH3_CTRL_OFFSET        0x18
#define MX53_USB_CLKONOFF_CTRL_OFFSET   0x24
#define MX53_USB_CLKONOFF_CTRL_H2_INT60CKOFF BIT(21)
#define MX53_USB_CLKONOFF_CTRL_H3_INT60CKOFF BIT(22)
#define MX53_BM_OVER_CUR_DIS_H1         BIT(5)
#define MX53_BM_OVER_CUR_DIS_OTG        BIT(8)
#define MX53_BM_OVER_CUR_DIS_UHx        BIT(30)
#define MX53_USB_CTRL_1_UH2_ULPI_EN     BIT(26)
#define MX53_USB_CTRL_1_UH3_ULPI_EN     BIT(27)
#define MX53_USB_UHx_CTRL_WAKE_UP_EN    BIT(7)
#define MX53_USB_UHx_CTRL_ULPI_INT_EN   BIT(8)
#define MX53_USB_PHYCTRL1_PLLDIV_MASK   0x3
#define MX53_USB_PLL_DIV_24_MHZ         0x01

#define MX6_BM_NON_BURST_SETTING        BIT(1)
#define MX6_BM_OVER_CUR_DIS             BIT(7)
#define MX6_BM_OVER_CUR_POLARITY        BIT(8)
#define MX6_BM_PWR_POLARITY             BIT(9)
#define MX6_BM_WAKEUP_ENABLE            BIT(10)
#define MX6_BM_UTMI_ON_CLOCK            BIT(13)
#define MX6_BM_ID_WAKEUP                BIT(16)
#define MX6_BM_VBUS_WAKEUP              BIT(17)
#define MX6SX_BM_DPDM_WAKEUP_EN         BIT(29)
#define MX6_BM_WAKEUP_INTR              BIT(31)

#define MX6_USB_HSIC_CTRL_OFFSET        0x10
/* Send resume signal without 480Mhz PHY clock */
#define MX6SX_BM_HSIC_AUTO_RESUME       BIT(23)
/* set before portsc.suspendM = 1 */
#define MX6_BM_HSIC_DEV_CONN            BIT(21)
/* HSIC enable */
#define MX6_BM_HSIC_EN                  BIT(12)
/* Force HSIC module 480M clock on, even when in Host is in suspend mode */
#define MX6_BM_HSIC_CLK_ON              BIT(11)

#define MX6_USB_OTG1_PHY_CTRL           0x18
/* For imx6dql, it is host-only controller, for later imx6, it is otg's */
#define MX6_USB_OTG2_PHY_CTRL           0x1c
#define MX6SX_USB_VBUS_WAKEUP_SOURCE(v) (v << 8)
#define MX6SX_USB_VBUS_WAKEUP_SOURCE_VBUS       MX6SX_USB_VBUS_WAKEUP_SOURCE(0)
#define MX6SX_USB_VBUS_WAKEUP_SOURCE_AVALID     MX6SX_USB_VBUS_WAKEUP_SOURCE(1)
#define MX6SX_USB_VBUS_WAKEUP_SOURCE_BVALID     MX6SX_USB_VBUS_WAKEUP_SOURCE(2)
#define MX6SX_USB_VBUS_WAKEUP_SOURCE_SESS_END   MX6SX_USB_VBUS_WAKEUP_SOURCE(3)

#define VF610_OVER_CUR_DIS              BIT(7)

#define MX7D_USBNC_USB_CTRL2            0x4
#define MX7D_USB_VBUS_WAKEUP_SOURCE_MASK        0x3
#define MX7D_USB_VBUS_WAKEUP_SOURCE(v)          (v << 0)
#define MX7D_USB_VBUS_WAKEUP_SOURCE_VBUS        MX7D_USB_VBUS_WAKEUP_SOURCE(0)
#define MX7D_USB_VBUS_WAKEUP_SOURCE_AVALID      MX7D_USB_VBUS_WAKEUP_SOURCE(1)
#define MX7D_USB_VBUS_WAKEUP_SOURCE_BVALID      MX7D_USB_VBUS_WAKEUP_SOURCE(2)
#define MX7D_USB_VBUS_WAKEUP_SOURCE_SESS_END    MX7D_USB_VBUS_WAKEUP_SOURCE(3)
#define MX7D_USBNC_AUTO_RESUME                          BIT(2)
/* The default DM/DP value is pull-down */
#define MX7D_USBNC_USB_CTRL2_OPMODE(v)                  (v << 6)
#define MX7D_USBNC_USB_CTRL2_OPMODE_NON_DRIVING MX7D_USBNC_USB_CTRL2_OPMODE(1)
#define MX7D_USBNC_USB_CTRL2_OPMODE_OVERRIDE_MASK       (BIT(7) | BIT(6))
#define MX7D_USBNC_USB_CTRL2_OPMODE_OVERRIDE_EN         BIT(8)
#define MX7D_USBNC_USB_CTRL2_DP_OVERRIDE_VAL            BIT(12)
#define MX7D_USBNC_USB_CTRL2_DP_OVERRIDE_EN             BIT(13)
#define MX7D_USBNC_USB_CTRL2_DM_OVERRIDE_VAL            BIT(14)
#define MX7D_USBNC_USB_CTRL2_DM_OVERRIDE_EN             BIT(15)
#define MX7D_USBNC_USB_CTRL2_DP_DM_MASK                 (BIT(12) | BIT(13) | \
                                                        BIT(14) | BIT(15))

#define MX7D_USB_OTG_PHY_CFG1           0x30
#define MX7D_USB_OTG_PHY_CFG2_CHRG_CHRGSEL      BIT(0)
#define MX7D_USB_OTG_PHY_CFG2_CHRG_VDATDETENB0  BIT(1)
#define MX7D_USB_OTG_PHY_CFG2_CHRG_VDATSRCENB0  BIT(2)
#define MX7D_USB_OTG_PHY_CFG2_CHRG_DCDENB       BIT(3)
#define MX7D_USB_OTG_PHY_CFG2_DRVVBUS0          BIT(16)

#define MX7D_USB_OTG_PHY_CFG2           0x34

#define MX7D_USB_OTG_PHY_STATUS         0x3c
#define MX7D_USB_OTG_PHY_STATUS_LINE_STATE0     BIT(0)
#define MX7D_USB_OTG_PHY_STATUS_LINE_STATE1     BIT(1)
#define MX7D_USB_OTG_PHY_STATUS_VBUS_VLD        BIT(3)
#define MX7D_USB_OTG_PHY_STATUS_CHRGDET         BIT(29)

#define MX6_USB_OTG_WAKEUP_BITS (MX6_BM_WAKEUP_ENABLE | MX6_BM_VBUS_WAKEUP | \
                                 MX6_BM_ID_WAKEUP)

struct usbmisc_ops {
        /* It's called once when probe a usb device */
        int (*init)(struct imx_usbmisc_data *data);
        /* It's called once after adding a usb device */
        int (*post)(struct imx_usbmisc_data *data);
        /* It's called when we need to enable/disable usb wakeup */
        int (*set_wakeup)(struct imx_usbmisc_data *data, bool enabled);
        /* It's called before setting portsc.suspendM */
        int (*hsic_set_connect)(struct imx_usbmisc_data *data);
        /* It's called during suspend/resume */
        int (*hsic_set_clk)(struct imx_usbmisc_data *data, bool enabled);
        /* usb charger detection */
        int (*charger_detection)(struct imx_usbmisc_data *data);
};

struct imx_usbmisc {
        void __iomem *base;
        spinlock_t lock;
        const struct usbmisc_ops *ops;
};

static inline bool is_imx53_usbmisc(struct imx_usbmisc_data *data);

static int usbmisc_imx25_init(struct imx_usbmisc_data *data)
{
        struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
        unsigned long flags;
        u32 val = 0;

        if (data->index > 1)
                return -EINVAL;

        spin_lock_irqsave(&usbmisc->lock, flags);
        switch (data->index) {
        case 0:
                val = readl(usbmisc->base);
                val &= ~(MX25_OTG_SIC_MASK | MX25_OTG_PP_BIT);
                val |= (MX25_EHCI_INTERFACE_DIFF_UNI & MX25_EHCI_INTERFACE_MASK) << MX25_OTG_SIC_SHIFT;
                val |= (MX25_OTG_PM_BIT | MX25_OTG_OCPOL_BIT);

                /*
                 * If the polarity is not configured assume active high for
                 * historical reasons.
                 */
                if (data->oc_pol_configured && data->oc_pol_active_low)
                        val &= ~MX25_OTG_OCPOL_BIT;

                writel(val, usbmisc->base);
                break;
        case 1:
                val = readl(usbmisc->base);
                val &= ~(MX25_H1_SIC_MASK | MX25_H1_PP_BIT |  MX25_H1_IPPUE_UP_BIT);
                val |= (MX25_EHCI_INTERFACE_SINGLE_UNI & MX25_EHCI_INTERFACE_MASK) << MX25_H1_SIC_SHIFT;
                val |= (MX25_H1_PM_BIT | MX25_H1_OCPOL_BIT | MX25_H1_TLL_BIT |
                        MX25_H1_USBTE_BIT | MX25_H1_IPPUE_DOWN_BIT);

                /*
                 * If the polarity is not configured assume active high for
                 * historical reasons.
                 */
                if (data->oc_pol_configured && data->oc_pol_active_low)
                        val &= ~MX25_H1_OCPOL_BIT;

                writel(val, usbmisc->base);

                break;
        }
        spin_unlock_irqrestore(&usbmisc->lock, flags);

        return 0;
}

static int usbmisc_imx25_post(struct imx_usbmisc_data *data)
{
        struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
        void __iomem *reg;
        unsigned long flags;
        u32 val;

        if (data->index > 2)
                return -EINVAL;

        if (data->index)
                return 0;

        spin_lock_irqsave(&usbmisc->lock, flags);
        reg = usbmisc->base + MX25_USB_PHY_CTRL_OFFSET;
        val = readl(reg);

        if (data->evdo)
                val |= MX25_BM_EXTERNAL_VBUS_DIVIDER;
        else
                val &= ~MX25_BM_EXTERNAL_VBUS_DIVIDER;

        writel(val, reg);
        spin_unlock_irqrestore(&usbmisc->lock, flags);
        usleep_range(5000, 10000); /* needed to stabilize voltage */

        return 0;
}

static int usbmisc_imx27_init(struct imx_usbmisc_data *data)
{
        struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
        unsigned long flags;
        u32 val;

        switch (data->index) {
        case 0:
                val = MX27_OTG_PM_BIT;
                break;
        case 1:
                val = MX27_H1_PM_BIT;
                break;
        case 2:
                val = MX27_H2_PM_BIT;
                break;
        default:
                return -EINVAL;
        }

        spin_lock_irqsave(&usbmisc->lock, flags);
        if (data->disable_oc)
                val = readl(usbmisc->base) | val;
        else
                val = readl(usbmisc->base) & ~val;
        writel(val, usbmisc->base);
        spin_unlock_irqrestore(&usbmisc->lock, flags);

        return 0;
}

static int usbmisc_imx53_init(struct imx_usbmisc_data *data)
{
        struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
        void __iomem *reg = NULL;
        unsigned long flags;
        u32 val = 0;

        if (data->index > 3)
                return -EINVAL;

        /* Select a 24 MHz reference clock for the PHY  */
        val = readl(usbmisc->base + MX53_USB_OTG_PHY_CTRL_1_OFFSET);
        val &= ~MX53_USB_PHYCTRL1_PLLDIV_MASK;
        val |= MX53_USB_PLL_DIV_24_MHZ;
        writel(val, usbmisc->base + MX53_USB_OTG_PHY_CTRL_1_OFFSET);

        spin_lock_irqsave(&usbmisc->lock, flags);

        switch (data->index) {
        case 0:
                if (data->disable_oc) {
                        reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
                        val = readl(reg) | MX53_BM_OVER_CUR_DIS_OTG;
                        writel(val, reg);
                }
                break;
        case 1:
                if (data->disable_oc) {
                        reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
                        val = readl(reg) | MX53_BM_OVER_CUR_DIS_H1;
                        writel(val, reg);
                }
                break;
        case 2:
                if (data->ulpi) {
                        /* set USBH2 into ULPI-mode. */
                        reg = usbmisc->base + MX53_USB_CTRL_1_OFFSET;
                        val = readl(reg) | MX53_USB_CTRL_1_UH2_ULPI_EN;
                        /* select ULPI clock */
                        val &= ~MX53_USB_CTRL_1_H2_XCVR_CLK_SEL_MASK;
                        val |= MX53_USB_CTRL_1_H2_XCVR_CLK_SEL_ULPI;
                        writel(val, reg);
                        /* Set interrupt wake up enable */
                        reg = usbmisc->base + MX53_USB_UH2_CTRL_OFFSET;
                        val = readl(reg) | MX53_USB_UHx_CTRL_WAKE_UP_EN
                                | MX53_USB_UHx_CTRL_ULPI_INT_EN;
                        writel(val, reg);
                        if (is_imx53_usbmisc(data)) {
                                /* Disable internal 60Mhz clock */
                                reg = usbmisc->base +
                                        MX53_USB_CLKONOFF_CTRL_OFFSET;
                                val = readl(reg) |
                                        MX53_USB_CLKONOFF_CTRL_H2_INT60CKOFF;
                                writel(val, reg);
                        }

                }
                if (data->disable_oc) {
                        reg = usbmisc->base + MX53_USB_UH2_CTRL_OFFSET;
                        val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
                        writel(val, reg);
                }
                break;
        case 3:
                if (data->ulpi) {
                        /* set USBH3 into ULPI-mode. */
                        reg = usbmisc->base + MX53_USB_CTRL_1_OFFSET;
                        val = readl(reg) | MX53_USB_CTRL_1_UH3_ULPI_EN;
                        /* select ULPI clock */
                        val &= ~MX53_USB_CTRL_1_H3_XCVR_CLK_SEL_MASK;
                        val |= MX53_USB_CTRL_1_H3_XCVR_CLK_SEL_ULPI;
                        writel(val, reg);
                        /* Set interrupt wake up enable */
                        reg = usbmisc->base + MX53_USB_UH3_CTRL_OFFSET;
                        val = readl(reg) | MX53_USB_UHx_CTRL_WAKE_UP_EN
                                | MX53_USB_UHx_CTRL_ULPI_INT_EN;
                        writel(val, reg);

                        if (is_imx53_usbmisc(data)) {
                                /* Disable internal 60Mhz clock */
                                reg = usbmisc->base +
                                        MX53_USB_CLKONOFF_CTRL_OFFSET;
                                val = readl(reg) |
                                        MX53_USB_CLKONOFF_CTRL_H3_INT60CKOFF;
                                writel(val, reg);
                        }
                }
                if (data->disable_oc) {
                        reg = usbmisc->base + MX53_USB_UH3_CTRL_OFFSET;
                        val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
                        writel(val, reg);
                }
                break;
        }

        spin_unlock_irqrestore(&usbmisc->lock, flags);

        return 0;
}

static u32 usbmisc_wakeup_setting(struct imx_usbmisc_data *data)
{
        u32 wakeup_setting = MX6_USB_OTG_WAKEUP_BITS;

        if (data->ext_id)
                wakeup_setting &= ~MX6_BM_ID_WAKEUP;

        if (data->ext_vbus)
                wakeup_setting &= ~MX6_BM_VBUS_WAKEUP;

        return wakeup_setting;
}

static int usbmisc_imx6q_set_wakeup
        (struct imx_usbmisc_data *data, bool enabled)
{
        struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
        unsigned long flags;
        u32 val;
        int ret = 0;

        if (data->index > 3)
                return -EINVAL;

        spin_lock_irqsave(&usbmisc->lock, flags);
        val = readl(usbmisc->base + data->index * 4);
        if (enabled) {
                val &= ~MX6_USB_OTG_WAKEUP_BITS;
                val |= usbmisc_wakeup_setting(data);
        } else {
                if (val & MX6_BM_WAKEUP_INTR)
                        pr_debug("wakeup int at ci_hdrc.%d\n", data->index);
                val &= ~MX6_USB_OTG_WAKEUP_BITS;
        }
        writel(val, usbmisc->base + data->index * 4);
        spin_unlock_irqrestore(&usbmisc->lock, flags);

        return ret;
}

static int usbmisc_imx6q_init(struct imx_usbmisc_data *data)
{
        struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
        unsigned long flags;
        u32 reg;

        if (data->index > 3)
                return -EINVAL;

        spin_lock_irqsave(&usbmisc->lock, flags);

        reg = readl(usbmisc->base + data->index * 4);
        if (data->disable_oc) {
                reg |= MX6_BM_OVER_CUR_DIS;
        } else {
                reg &= ~MX6_BM_OVER_CUR_DIS;

                /*
                 * If the polarity is not configured keep it as setup by the
                 * bootloader.
                 */
                if (data->oc_pol_configured && data->oc_pol_active_low)
                        reg |= MX6_BM_OVER_CUR_POLARITY;
                else if (data->oc_pol_configured)
                        reg &= ~MX6_BM_OVER_CUR_POLARITY;
        }
        /* If the polarity is not set keep it as setup by the bootlader */
        if (data->pwr_pol == 1)
                reg |= MX6_BM_PWR_POLARITY;
        writel(reg, usbmisc->base + data->index * 4);

        /* SoC non-burst setting */
        reg = readl(usbmisc->base + data->index * 4);
        writel(reg | MX6_BM_NON_BURST_SETTING,
                        usbmisc->base + data->index * 4);

        /* For HSIC controller */
        if (data->hsic) {
                reg = readl(usbmisc->base + data->index * 4);
                writel(reg | MX6_BM_UTMI_ON_CLOCK,
                        usbmisc->base + data->index * 4);
                reg = readl(usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET
                        + (data->index - 2) * 4);
                reg |= MX6_BM_HSIC_EN | MX6_BM_HSIC_CLK_ON;
                writel(reg, usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET
                        + (data->index - 2) * 4);
        }

        spin_unlock_irqrestore(&usbmisc->lock, flags);

        usbmisc_imx6q_set_wakeup(data, false);

        return 0;
}

static int usbmisc_imx6_hsic_get_reg_offset(struct imx_usbmisc_data *data)
{
        int offset, ret = 0;

        if (data->index == 2 || data->index == 3) {
                offset = (data->index - 2) * 4;
        } else if (data->index == 0) {
                /*
                 * For SoCs like i.MX7D and later, each USB controller has
                 * its own non-core register region. For SoCs before i.MX7D,
                 * the first two USB controllers are non-HSIC controllers.
                 */
                offset = 0;
        } else {
                dev_err(data->dev, "index is error for usbmisc\n");
                ret = -EINVAL;
        }

        return ret ? ret : offset;
}

static int usbmisc_imx6_hsic_set_connect(struct imx_usbmisc_data *data)
{
        unsigned long flags;
        u32 val;
        struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
        int offset;

        spin_lock_irqsave(&usbmisc->lock, flags);
        offset = usbmisc_imx6_hsic_get_reg_offset(data);
        if (offset < 0) {
                spin_unlock_irqrestore(&usbmisc->lock, flags);
                return offset;
        }

        val = readl(usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET + offset);
        if (!(val & MX6_BM_HSIC_DEV_CONN))
                writel(val | MX6_BM_HSIC_DEV_CONN,
                        usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET + offset);

        spin_unlock_irqrestore(&usbmisc->lock, flags);

        return 0;
}

static int usbmisc_imx6_hsic_set_clk(struct imx_usbmisc_data *data, bool on)
{
        unsigned long flags;
        u32 val;
        struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
        int offset;

        spin_lock_irqsave(&usbmisc->lock, flags);
        offset = usbmisc_imx6_hsic_get_reg_offset(data);
        if (offset < 0) {
                spin_unlock_irqrestore(&usbmisc->lock, flags);
                return offset;
        }

        val = readl(usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET + offset);
        val |= MX6_BM_HSIC_EN | MX6_BM_HSIC_CLK_ON;
        if (on)
                val |= MX6_BM_HSIC_CLK_ON;
        else
                val &= ~MX6_BM_HSIC_CLK_ON;

        writel(val, usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET + offset);
        spin_unlock_irqrestore(&usbmisc->lock, flags);

        return 0;
}


static int usbmisc_imx6sx_init(struct imx_usbmisc_data *data)
{
        void __iomem *reg = NULL;
        unsigned long flags;
        struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
        u32 val;

        usbmisc_imx6q_init(data);

        if (data->index == 0 || data->index == 1) {
                reg = usbmisc->base + MX6_USB_OTG1_PHY_CTRL + data->index * 4;
                spin_lock_irqsave(&usbmisc->lock, flags);
                /* Set vbus wakeup source as bvalid */
                val = readl(reg);
                writel(val | MX6SX_USB_VBUS_WAKEUP_SOURCE_BVALID, reg);
                /*
                 * Disable dp/dm wakeup in device mode when vbus is
                 * not there.
                 */
                val = readl(usbmisc->base + data->index * 4);
                writel(val & ~MX6SX_BM_DPDM_WAKEUP_EN,
                        usbmisc->base + data->index * 4);
                spin_unlock_irqrestore(&usbmisc->lock, flags);
        }

        /* For HSIC controller */
        if (data->hsic) {
                val = readl(usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET);
                val |= MX6SX_BM_HSIC_AUTO_RESUME;
                writel(val, usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET);
        }

        return 0;
}

static int usbmisc_vf610_init(struct imx_usbmisc_data *data)
{
        struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
        u32 reg;

        /*
         * Vybrid only has one misc register set, but in two different
         * areas. These is reflected in two instances of this driver.
         */
        if (data->index >= 1)
                return -EINVAL;

        if (data->disable_oc) {
                reg = readl(usbmisc->base);
                writel(reg | VF610_OVER_CUR_DIS, usbmisc->base);
        }

        return 0;
}

static int usbmisc_imx7d_set_wakeup
        (struct imx_usbmisc_data *data, bool enabled)
{
        struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
        unsigned long flags;
        u32 val;

        spin_lock_irqsave(&usbmisc->lock, flags);
        val = readl(usbmisc->base);
        if (enabled) {
                val &= ~MX6_USB_OTG_WAKEUP_BITS;
                val |= usbmisc_wakeup_setting(data);
                writel(val, usbmisc->base);
        } else {
                if (val & MX6_BM_WAKEUP_INTR)
                        dev_dbg(data->dev, "wakeup int\n");
                writel(val & ~MX6_USB_OTG_WAKEUP_BITS, usbmisc->base);
        }
        spin_unlock_irqrestore(&usbmisc->lock, flags);

        return 0;
}

static int usbmisc_imx7d_init(struct imx_usbmisc_data *data)
{
        struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
        unsigned long flags;
        u32 reg;

        if (data->index >= 1)
                return -EINVAL;

        spin_lock_irqsave(&usbmisc->lock, flags);
        reg = readl(usbmisc->base);
        if (data->disable_oc) {
                reg |= MX6_BM_OVER_CUR_DIS;
        } else {
                reg &= ~MX6_BM_OVER_CUR_DIS;

                /*
                 * If the polarity is not configured keep it as setup by the
                 * bootloader.
                 */
                if (data->oc_pol_configured && data->oc_pol_active_low)
                        reg |= MX6_BM_OVER_CUR_POLARITY;
                else if (data->oc_pol_configured)
                        reg &= ~MX6_BM_OVER_CUR_POLARITY;
        }
        /* If the polarity is not set keep it as setup by the bootlader */
        if (data->pwr_pol == 1)
                reg |= MX6_BM_PWR_POLARITY;
        writel(reg, usbmisc->base);

        /* SoC non-burst setting */
        reg = readl(usbmisc->base);
        writel(reg | MX6_BM_NON_BURST_SETTING, usbmisc->base);

        if (!data->hsic) {
                reg = readl(usbmisc->base + MX7D_USBNC_USB_CTRL2);
                reg &= ~MX7D_USB_VBUS_WAKEUP_SOURCE_MASK;
                writel(reg | MX7D_USB_VBUS_WAKEUP_SOURCE_BVALID
                        | MX7D_USBNC_AUTO_RESUME,
                        usbmisc->base + MX7D_USBNC_USB_CTRL2);
        }

        spin_unlock_irqrestore(&usbmisc->lock, flags);

        usbmisc_imx7d_set_wakeup(data, false);

        return 0;
}

static int imx7d_charger_secondary_detection(struct imx_usbmisc_data *data)
{
        struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
        struct usb_phy *usb_phy = data->usb_phy;
        int val;
        unsigned long flags;

        /* VDM_SRC is connected to D- and IDP_SINK is connected to D+ */
        spin_lock_irqsave(&usbmisc->lock, flags);
        val = readl(usbmisc->base + MX7D_USB_OTG_PHY_CFG2);
        writel(val | MX7D_USB_OTG_PHY_CFG2_CHRG_VDATSRCENB0 |
                        MX7D_USB_OTG_PHY_CFG2_CHRG_VDATDETENB0 |
                        MX7D_USB_OTG_PHY_CFG2_CHRG_CHRGSEL,
                                usbmisc->base + MX7D_USB_OTG_PHY_CFG2);
        spin_unlock_irqrestore(&usbmisc->lock, flags);

        usleep_range(1000, 2000);

        /*
         * Per BC 1.2, check voltage of D+:
         * DCP: if greater than VDAT_REF;
         * CDP: if less than VDAT_REF.
         */
        val = readl(usbmisc->base + MX7D_USB_OTG_PHY_STATUS);
        if (val & MX7D_USB_OTG_PHY_STATUS_CHRGDET) {
                dev_dbg(data->dev, "It is a dedicate charging port\n");
                usb_phy->chg_type = DCP_TYPE;
        } else {
                dev_dbg(data->dev, "It is a charging downstream port\n");
                usb_phy->chg_type = CDP_TYPE;
        }

        return 0;
}

static void imx7_disable_charger_detector(struct imx_usbmisc_data *data)
{
        struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
        unsigned long flags;
        u32 val;

        spin_lock_irqsave(&usbmisc->lock, flags);
        val = readl(usbmisc->base + MX7D_USB_OTG_PHY_CFG2);
        val &= ~(MX7D_USB_OTG_PHY_CFG2_CHRG_DCDENB |
                        MX7D_USB_OTG_PHY_CFG2_CHRG_VDATSRCENB0 |
                        MX7D_USB_OTG_PHY_CFG2_CHRG_VDATDETENB0 |
                        MX7D_USB_OTG_PHY_CFG2_CHRG_CHRGSEL);
        writel(val, usbmisc->base + MX7D_USB_OTG_PHY_CFG2);

        /* Set OPMODE to be 2'b00 and disable its override */
        val = readl(usbmisc->base + MX7D_USBNC_USB_CTRL2);
        val &= ~MX7D_USBNC_USB_CTRL2_OPMODE_OVERRIDE_MASK;
        writel(val, usbmisc->base + MX7D_USBNC_USB_CTRL2);

        val = readl(usbmisc->base + MX7D_USBNC_USB_CTRL2);
        writel(val & ~MX7D_USBNC_USB_CTRL2_OPMODE_OVERRIDE_EN,
                        usbmisc->base + MX7D_USBNC_USB_CTRL2);
        spin_unlock_irqrestore(&usbmisc->lock, flags);
}

static int imx7d_charger_data_contact_detect(struct imx_usbmisc_data *data)
{
        struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
        unsigned long flags;
        u32 val;
        int i, data_pin_contact_count = 0;

        /* Enable Data Contact Detect (DCD) per the USB BC 1.2 */
        spin_lock_irqsave(&usbmisc->lock, flags);
        val = readl(usbmisc->base + MX7D_USB_OTG_PHY_CFG2);
        writel(val | MX7D_USB_OTG_PHY_CFG2_CHRG_DCDENB,
                        usbmisc->base + MX7D_USB_OTG_PHY_CFG2);
        spin_unlock_irqrestore(&usbmisc->lock, flags);

        for (i = 0; i < 100; i = i + 1) {
                val = readl(usbmisc->base + MX7D_USB_OTG_PHY_STATUS);
                if (!(val & MX7D_USB_OTG_PHY_STATUS_LINE_STATE0)) {
                        if (data_pin_contact_count++ > 5)
                                /* Data pin makes contact */
                                break;
                        usleep_range(5000, 10000);
                } else {
                        data_pin_contact_count = 0;
                        usleep_range(5000, 6000);
                }
        }

        /* Disable DCD after finished data contact check */
        spin_lock_irqsave(&usbmisc->lock, flags);
        val = readl(usbmisc->base + MX7D_USB_OTG_PHY_CFG2);
        writel(val & ~MX7D_USB_OTG_PHY_CFG2_CHRG_DCDENB,
                        usbmisc->base + MX7D_USB_OTG_PHY_CFG2);
        spin_unlock_irqrestore(&usbmisc->lock, flags);

        if (i == 100) {
                dev_err(data->dev,
                        "VBUS is coming from a dedicated power supply.\n");
                return -ENXIO;
        }

        return 0;
}

static int imx7d_charger_primary_detection(struct imx_usbmisc_data *data)
{
        struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
        struct usb_phy *usb_phy = data->usb_phy;
        unsigned long flags;
        u32 val;

        /* VDP_SRC is connected to D+ and IDM_SINK is connected to D- */
        spin_lock_irqsave(&usbmisc->lock, flags);
        val = readl(usbmisc->base + MX7D_USB_OTG_PHY_CFG2);
        val &= ~MX7D_USB_OTG_PHY_CFG2_CHRG_CHRGSEL;
        writel(val | MX7D_USB_OTG_PHY_CFG2_CHRG_VDATSRCENB0 |
                        MX7D_USB_OTG_PHY_CFG2_CHRG_VDATDETENB0,
                                usbmisc->base + MX7D_USB_OTG_PHY_CFG2);
        spin_unlock_irqrestore(&usbmisc->lock, flags);

        usleep_range(1000, 2000);

        /* Check if D- is less than VDAT_REF to determine an SDP per BC 1.2 */
        val = readl(usbmisc->base + MX7D_USB_OTG_PHY_STATUS);
        if (!(val & MX7D_USB_OTG_PHY_STATUS_CHRGDET)) {
                dev_dbg(data->dev, "It is a standard downstream port\n");
                usb_phy->chg_type = SDP_TYPE;
        }

        return 0;
}

/**
 * Whole charger detection process:
 * 1. OPMODE override to be non-driving
 * 2. Data contact check
 * 3. Primary detection
 * 4. Secondary detection
 * 5. Disable charger detection
 */
static int imx7d_charger_detection(struct imx_usbmisc_data *data)
{
        struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
        struct usb_phy *usb_phy = data->usb_phy;
        unsigned long flags;
        u32 val;
        int ret;

        /* Check if vbus is valid */
        val = readl(usbmisc->base + MX7D_USB_OTG_PHY_STATUS);
        if (!(val & MX7D_USB_OTG_PHY_STATUS_VBUS_VLD)) {
                dev_err(data->dev, "vbus is error\n");
                return -EINVAL;
        }

        /*
         * Keep OPMODE to be non-driving mode during the whole
         * charger detection process.
         */
        spin_lock_irqsave(&usbmisc->lock, flags);
        val = readl(usbmisc->base + MX7D_USBNC_USB_CTRL2);
        val &= ~MX7D_USBNC_USB_CTRL2_OPMODE_OVERRIDE_MASK;
        val |= MX7D_USBNC_USB_CTRL2_OPMODE_NON_DRIVING;
        writel(val, usbmisc->base + MX7D_USBNC_USB_CTRL2);

        val = readl(usbmisc->base + MX7D_USBNC_USB_CTRL2);
        writel(val | MX7D_USBNC_USB_CTRL2_OPMODE_OVERRIDE_EN,
                        usbmisc->base + MX7D_USBNC_USB_CTRL2);
        spin_unlock_irqrestore(&usbmisc->lock, flags);

        ret = imx7d_charger_data_contact_detect(data);
        if (ret)
                return ret;

        ret = imx7d_charger_primary_detection(data);
        if (!ret && usb_phy->chg_type != SDP_TYPE)
                ret = imx7d_charger_secondary_detection(data);

        imx7_disable_charger_detector(data);

        return ret;
}

static int usbmisc_imx7ulp_init(struct imx_usbmisc_data *data)
{
        struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
        unsigned long flags;
        u32 reg;

        if (data->index >= 1)
                return -EINVAL;

        spin_lock_irqsave(&usbmisc->lock, flags);
        reg = readl(usbmisc->base);
        if (data->disable_oc) {
                reg |= MX6_BM_OVER_CUR_DIS;
        } else {
                reg &= ~MX6_BM_OVER_CUR_DIS;

                /*
                 * If the polarity is not configured keep it as setup by the
                 * bootloader.
                 */
                if (data->oc_pol_configured && data->oc_pol_active_low)
                        reg |= MX6_BM_OVER_CUR_POLARITY;
                else if (data->oc_pol_configured)
                        reg &= ~MX6_BM_OVER_CUR_POLARITY;
        }
        /* If the polarity is not set keep it as setup by the bootlader */
        if (data->pwr_pol == 1)
                reg |= MX6_BM_PWR_POLARITY;

        writel(reg, usbmisc->base);

        /* SoC non-burst setting */
        reg = readl(usbmisc->base);
        writel(reg | MX6_BM_NON_BURST_SETTING, usbmisc->base);

        if (data->hsic) {
                reg = readl(usbmisc->base);
                writel(reg | MX6_BM_UTMI_ON_CLOCK, usbmisc->base);

                reg = readl(usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET);
                reg |= MX6_BM_HSIC_EN | MX6_BM_HSIC_CLK_ON;
                writel(reg, usbmisc->base + MX6_USB_HSIC_CTRL_OFFSET);

                /*
                 * For non-HSIC controller, the autoresume is enabled
                 * at MXS PHY driver (usbphy_ctrl bit18).
                 */
                reg = readl(usbmisc->base + MX7D_USBNC_USB_CTRL2);
                writel(reg | MX7D_USBNC_AUTO_RESUME,
                        usbmisc->base + MX7D_USBNC_USB_CTRL2);
        } else {
                reg = readl(usbmisc->base + MX7D_USBNC_USB_CTRL2);
                reg &= ~MX7D_USB_VBUS_WAKEUP_SOURCE_MASK;
                writel(reg | MX7D_USB_VBUS_WAKEUP_SOURCE_BVALID,
                         usbmisc->base + MX7D_USBNC_USB_CTRL2);
        }

        spin_unlock_irqrestore(&usbmisc->lock, flags);

        usbmisc_imx7d_set_wakeup(data, false);

        return 0;
}

static const struct usbmisc_ops imx25_usbmisc_ops = {
        .init = usbmisc_imx25_init,
        .post = usbmisc_imx25_post,
};

static const struct usbmisc_ops imx27_usbmisc_ops = {
        .init = usbmisc_imx27_init,
};

static const struct usbmisc_ops imx51_usbmisc_ops = {
        .init = usbmisc_imx53_init,
};

static const struct usbmisc_ops imx53_usbmisc_ops = {
        .init = usbmisc_imx53_init,
};

static const struct usbmisc_ops imx6q_usbmisc_ops = {
        .set_wakeup = usbmisc_imx6q_set_wakeup,
        .init = usbmisc_imx6q_init,
        .hsic_set_connect = usbmisc_imx6_hsic_set_connect,
        .hsic_set_clk   = usbmisc_imx6_hsic_set_clk,
};

static const struct usbmisc_ops vf610_usbmisc_ops = {
        .init = usbmisc_vf610_init,
};

static const struct usbmisc_ops imx6sx_usbmisc_ops = {
        .set_wakeup = usbmisc_imx6q_set_wakeup,
        .init = usbmisc_imx6sx_init,
        .hsic_set_connect = usbmisc_imx6_hsic_set_connect,
        .hsic_set_clk = usbmisc_imx6_hsic_set_clk,
};

static const struct usbmisc_ops imx7d_usbmisc_ops = {
        .init = usbmisc_imx7d_init,
        .set_wakeup = usbmisc_imx7d_set_wakeup,
        .charger_detection = imx7d_charger_detection,
};

static const struct usbmisc_ops imx7ulp_usbmisc_ops = {
        .init = usbmisc_imx7ulp_init,
        .set_wakeup = usbmisc_imx7d_set_wakeup,
        .hsic_set_connect = usbmisc_imx6_hsic_set_connect,
        .hsic_set_clk = usbmisc_imx6_hsic_set_clk,
};

static inline bool is_imx53_usbmisc(struct imx_usbmisc_data *data)
{
        struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);

        return usbmisc->ops == &imx53_usbmisc_ops;
}

int imx_usbmisc_init(struct imx_usbmisc_data *data)
{
        struct imx_usbmisc *usbmisc;

        if (!data)
                return 0;

        usbmisc = dev_get_drvdata(data->dev);
        if (!usbmisc->ops->init)
                return 0;
        return usbmisc->ops->init(data);
}
EXPORT_SYMBOL_GPL(imx_usbmisc_init);

int imx_usbmisc_init_post(struct imx_usbmisc_data *data)
{
        struct imx_usbmisc *usbmisc;

        if (!data)
                return 0;

        usbmisc = dev_get_drvdata(data->dev);
        if (!usbmisc->ops->post)
                return 0;
        return usbmisc->ops->post(data);
}
EXPORT_SYMBOL_GPL(imx_usbmisc_init_post);

int imx_usbmisc_set_wakeup(struct imx_usbmisc_data *data, bool enabled)
{
        struct imx_usbmisc *usbmisc;

        if (!data)
                return 0;

        usbmisc = dev_get_drvdata(data->dev);
        if (!usbmisc->ops->set_wakeup)
                return 0;
        return usbmisc->ops->set_wakeup(data, enabled);

}
EXPORT_SYMBOL_GPL(imx_usbmisc_set_wakeup);

int imx_usbmisc_hsic_set_connect(struct imx_usbmisc_data *data)
{
        struct imx_usbmisc *usbmisc;

        if (!data)
                return 0;

        usbmisc = dev_get_drvdata(data->dev);
        if (!usbmisc->ops->hsic_set_connect || !data->hsic)
                return 0;
        return usbmisc->ops->hsic_set_connect(data);
}
EXPORT_SYMBOL_GPL(imx_usbmisc_hsic_set_connect);

int imx_usbmisc_hsic_set_clk(struct imx_usbmisc_data *data, bool on)
{
        struct imx_usbmisc *usbmisc;

        if (!data)
                return 0;

        usbmisc = dev_get_drvdata(data->dev);
        if (!usbmisc->ops->hsic_set_clk || !data->hsic)
                return 0;
        return usbmisc->ops->hsic_set_clk(data, on);
}
EXPORT_SYMBOL_GPL(imx_usbmisc_hsic_set_clk);

int imx_usbmisc_charger_detection(struct imx_usbmisc_data *data, bool connect)
{
        struct imx_usbmisc *usbmisc;
        struct usb_phy *usb_phy;
        int ret = 0;

        if (!data)
                return -EINVAL;

        usbmisc = dev_get_drvdata(data->dev);
        usb_phy = data->usb_phy;
        if (!usbmisc->ops->charger_detection)
                return -ENOTSUPP;

        if (connect) {
                ret = usbmisc->ops->charger_detection(data);
                if (ret) {
                        dev_err(data->dev,
                                        "Error occurs during detection: %d\n",
                                        ret);
                        usb_phy->chg_state = USB_CHARGER_ABSENT;
                } else {
                        usb_phy->chg_state = USB_CHARGER_PRESENT;
                }
        } else {
                usb_phy->chg_state = USB_CHARGER_ABSENT;
                usb_phy->chg_type = UNKNOWN_TYPE;
        }
        return ret;
}
EXPORT_SYMBOL_GPL(imx_usbmisc_charger_detection);

static const struct of_device_id usbmisc_imx_dt_ids[] = {
        {
                .compatible = "fsl,imx25-usbmisc",
                .data = &imx25_usbmisc_ops,
        },
        {
                .compatible = "fsl,imx35-usbmisc",
                .data = &imx25_usbmisc_ops,
        },
        {
                .compatible = "fsl,imx27-usbmisc",
                .data = &imx27_usbmisc_ops,
        },
        {
                .compatible = "fsl,imx51-usbmisc",
                .data = &imx51_usbmisc_ops,
        },
        {
                .compatible = "fsl,imx53-usbmisc",
                .data = &imx53_usbmisc_ops,
        },
        {
                .compatible = "fsl,imx6q-usbmisc",
                .data = &imx6q_usbmisc_ops,
        },
        {
                .compatible = "fsl,vf610-usbmisc",
                .data = &vf610_usbmisc_ops,
        },
        {
                .compatible = "fsl,imx6sx-usbmisc",
                .data = &imx6sx_usbmisc_ops,
        },
        {
                .compatible = "fsl,imx6ul-usbmisc",
                .data = &imx6sx_usbmisc_ops,
        },
        {
                .compatible = "fsl,imx7d-usbmisc",
                .data = &imx7d_usbmisc_ops,
        },
        {
                .compatible = "fsl,imx7ulp-usbmisc",
                .data = &imx7ulp_usbmisc_ops,
        },
        { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, usbmisc_imx_dt_ids);

static int usbmisc_imx_probe(struct platform_device *pdev)
{
        struct imx_usbmisc *data;
        const struct of_device_id *of_id;

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

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

        spin_lock_init(&data->lock);

        data->base = devm_platform_ioremap_resource(pdev, 0);
        if (IS_ERR(data->base))
                return PTR_ERR(data->base);

        data->ops = (const struct usbmisc_ops *)of_id->data;
        platform_set_drvdata(pdev, data);

        return 0;
}

static int usbmisc_imx_remove(struct platform_device *pdev)
{
        return 0;
}

static struct platform_driver usbmisc_imx_driver = {
        .probe = usbmisc_imx_probe,
        .remove = usbmisc_imx_remove,
        .driver = {
                .name = "usbmisc_imx",
                .of_match_table = usbmisc_imx_dt_ids,
         },
};

module_platform_driver(usbmisc_imx_driver);

MODULE_ALIAS("platform:usbmisc-imx");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("driver for imx usb non-core registers");
MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");