// SPDX-License-Identifier: GPL-2.0
/*
 * Renesas USB driver RZ/A2 initialization and power control
 *
 * Copyright (C) 2019 Chris Brandt
 * Copyright (C) 2019 Renesas Electronics Corporation
 */

#include <linux/delay.h>
#include <linux/io.h>
#include <linux/phy/phy.h>
#include "common.h"
#include "rza.h"

static int usbhs_rza2_hardware_init(struct platform_device *pdev)
{
        struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
        struct phy *phy = phy_get(&pdev->dev, "usb");

        if (IS_ERR(phy))
                return PTR_ERR(phy);

        priv->phy = phy;
        return 0;
}

static int usbhs_rza2_hardware_exit(struct platform_device *pdev)
{
        struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);

        phy_put(&pdev->dev, priv->phy);
        priv->phy = NULL;

        return 0;
}

static int usbhs_rza2_power_ctrl(struct platform_device *pdev,
                                void __iomem *base, int enable)
{
        struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
        int retval = 0;

        if (!priv->phy)
                return -ENODEV;

        if (enable) {
                retval = phy_init(priv->phy);
                usbhs_bset(priv, SUSPMODE, SUSPM, SUSPM);
                udelay(100);    /* Wait for PLL to become stable */
                if (!retval)
                        retval = phy_power_on(priv->phy);
        } else {
                usbhs_bset(priv, SUSPMODE, SUSPM, 0);
                phy_power_off(priv->phy);
                phy_exit(priv->phy);
        }

        return retval;
}

const struct renesas_usbhs_platform_info usbhs_rza2_plat_info = {
        .platform_callback = {
                .hardware_init = usbhs_rza2_hardware_init,
                .hardware_exit = usbhs_rza2_hardware_exit,
                .power_ctrl = usbhs_rza2_power_ctrl,
                .get_id = usbhs_get_id_as_gadget,
        },
        .driver_param = {
                .has_cnen = 1,
                .cfifo_byte_addr = 1,
                .has_new_pipe_configs = 1,
        },
};

const struct renesas_usbhs_platform_info usbhs_rzg2l_plat_info = {
        .platform_callback = {
                .hardware_init = usbhs_rza2_hardware_init,
                .hardware_exit = usbhs_rza2_hardware_exit,
                .power_ctrl = usbhs_rza2_power_ctrl,
                .get_id = usbhs_get_id_as_gadget,
        },
        .driver_param = {
                .has_cnen = 1,
                .cfifo_byte_addr = 1,
        },
};