// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (C) 2024 Schneider-Electric
 *
 * Clément Léger <clement.leger@bootlin.com>
 */

#include <linux/of.h>
#include <linux/pcs-rzn1-miic.h>
#include <linux/phylink.h>
#include <linux/platform_device.h>

#include "stmmac_platform.h"
#include "stmmac.h"

static int rzn1_dwmac_pcs_init(struct stmmac_priv *priv)
{
        struct device_node *np = priv->device->of_node;
        struct device_node *pcs_node;
        struct phylink_pcs *pcs;

        pcs_node = of_parse_phandle(np, "pcs-handle", 0);

        if (pcs_node) {
                pcs = miic_create(priv->device, pcs_node);
                of_node_put(pcs_node);
                if (IS_ERR(pcs))
                        return PTR_ERR(pcs);

                priv->hw->phylink_pcs = pcs;
        }

        return 0;
}

static void rzn1_dwmac_pcs_exit(struct stmmac_priv *priv)
{
        if (priv->hw->phylink_pcs)
                miic_destroy(priv->hw->phylink_pcs);
}

static struct phylink_pcs *rzn1_dwmac_select_pcs(struct stmmac_priv *priv,
                                                 phy_interface_t interface)
{
        return priv->hw->phylink_pcs;
}

static int rzn1_dwmac_probe(struct platform_device *pdev)
{
        struct plat_stmmacenet_data *plat_dat;
        struct stmmac_resources stmmac_res;
        struct device *dev = &pdev->dev;
        int ret;

        ret = stmmac_get_platform_resources(pdev, &stmmac_res);
        if (ret)
                return ret;

        plat_dat = devm_stmmac_probe_config_dt(pdev, stmmac_res.mac);
        if (IS_ERR(plat_dat))
                return PTR_ERR(plat_dat);

        plat_dat->bsp_priv = plat_dat;
        plat_dat->pcs_init = rzn1_dwmac_pcs_init;
        plat_dat->pcs_exit = rzn1_dwmac_pcs_exit;
        plat_dat->select_pcs = rzn1_dwmac_select_pcs;

        ret = stmmac_dvr_probe(dev, plat_dat, &stmmac_res);
        if (ret)
                return ret;

        return 0;
}

static const struct of_device_id rzn1_dwmac_match[] = {
        { .compatible = "renesas,rzn1-gmac" },
        { }
};
MODULE_DEVICE_TABLE(of, rzn1_dwmac_match);

static struct platform_driver rzn1_dwmac_driver = {
        .probe  = rzn1_dwmac_probe,
        .remove = stmmac_pltfr_remove,
        .driver = {
                .name           = "rzn1-dwmac",
                .of_match_table = rzn1_dwmac_match,
        },
};
module_platform_driver(rzn1_dwmac_driver);

MODULE_AUTHOR("Clément Léger <clement.leger@bootlin.com>");
MODULE_DESCRIPTION("Renesas RZN1 DWMAC specific glue layer");
MODULE_LICENSE("GPL");