// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2014 Marvell Technology Group Ltd.
 *
 * Antoine Tenart <antoine.tenart@free-electrons.com>
 */

#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/usb/chipidea.h>
#include <linux/usb/hcd.h>
#include <linux/usb/ulpi.h>

#include "ci.h"

struct ci_hdrc_usb2_priv {
        struct platform_device  *ci_pdev;
        struct clk              *clk;
};

static const struct ci_hdrc_platform_data ci_default_pdata = {
        .capoffset      = DEF_CAPOFFSET,
        .flags          = CI_HDRC_DISABLE_STREAMING,
};

static const struct ci_hdrc_platform_data ci_zynq_pdata = {
        .capoffset      = DEF_CAPOFFSET,
        .flags          = CI_HDRC_PHY_VBUS_CONTROL,
};

static const struct ci_hdrc_platform_data ci_zevio_pdata = {
        .capoffset      = DEF_CAPOFFSET,
        .flags          = CI_HDRC_REGS_SHARED | CI_HDRC_FORCE_FULLSPEED,
};

static const struct of_device_id ci_hdrc_usb2_of_match[] = {
        { .compatible = "chipidea,usb2" },
        { .compatible = "xlnx,zynq-usb-2.20a", .data = &ci_zynq_pdata },
        { .compatible = "lsi,zevio-usb", .data = &ci_zevio_pdata },
        { }
};
MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);

static int ci_hdrc_usb2_probe(struct platform_device *pdev)
{
        struct device *dev = &pdev->dev;
        struct ci_hdrc_usb2_priv *priv;
        struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev);
        const struct ci_hdrc_platform_data *data;
        int ret;

        if (!ci_pdata) {
                ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL);
                if (!ci_pdata)
                        return -ENOMEM;
                *ci_pdata = ci_default_pdata;   /* struct copy */
        }

        data = device_get_match_data(&pdev->dev);
        if (data)
                /* struct copy */
                *ci_pdata = *data;

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

        priv->clk = devm_clk_get_optional(dev, NULL);
        if (IS_ERR(priv->clk))
                return PTR_ERR(priv->clk);

        ret = clk_prepare_enable(priv->clk);
        if (ret) {
                dev_err(dev, "failed to enable the clock: %d\n", ret);
                return ret;
        }

        ci_pdata->name = dev_name(dev);

        priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
                                           pdev->num_resources, ci_pdata);
        if (IS_ERR(priv->ci_pdev)) {
                ret = PTR_ERR(priv->ci_pdev);
                if (ret != -EPROBE_DEFER)
                        dev_err(dev,
                                "failed to register ci_hdrc platform device: %d\n",
                                ret);
                goto clk_err;
        }

        platform_set_drvdata(pdev, priv);

        pm_runtime_no_callbacks(dev);
        pm_runtime_enable(dev);

        return 0;

clk_err:
        clk_disable_unprepare(priv->clk);
        return ret;
}

static void ci_hdrc_usb2_remove(struct platform_device *pdev)
{
        struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev);

        pm_runtime_disable(&pdev->dev);
        ci_hdrc_remove_device(priv->ci_pdev);
        clk_disable_unprepare(priv->clk);
}

static struct platform_driver ci_hdrc_usb2_driver = {
        .probe  = ci_hdrc_usb2_probe,
        .remove = ci_hdrc_usb2_remove,
        .driver = {
                .name           = "chipidea-usb2",
                .of_match_table = ci_hdrc_usb2_of_match,
        },
};
module_platform_driver(ci_hdrc_usb2_driver);

MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
MODULE_LICENSE("GPL");