// SPDX-License-Identifier: GPL-2.0+
/*
 * Sophgo DWMAC platform driver
 *
 * Copyright (C) 2024 Inochi Amaoto <inochiama@gmail.com>
 */

#include <linux/clk.h>
#include <linux/module.h>
#include <linux/property.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>

#include "stmmac_platform.h"

struct sophgo_dwmac_data {
        bool has_internal_rx_delay;
};

static int sophgo_sg2044_dwmac_init(struct platform_device *pdev,
                                    struct plat_stmmacenet_data *plat_dat,
                                    struct stmmac_resources *stmmac_res)
{
        plat_dat->clk_tx_i = devm_clk_get_enabled(&pdev->dev, "tx");
        if (IS_ERR(plat_dat->clk_tx_i))
                return dev_err_probe(&pdev->dev, PTR_ERR(plat_dat->clk_tx_i),
                                     "failed to get tx clock\n");

        plat_dat->flags |= STMMAC_FLAG_SPH_DISABLE;
        plat_dat->set_clk_tx_rate = stmmac_set_clk_tx_rate;
        plat_dat->multicast_filter_bins = 0;

        return 0;
}

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

        ret = stmmac_get_platform_resources(pdev, &stmmac_res);
        if (ret)
                return dev_err_probe(dev, ret,
                                     "failed to get platform resources\n");

        plat_dat = devm_stmmac_probe_config_dt(pdev, stmmac_res.mac);
        if (IS_ERR(plat_dat))
                return dev_err_probe(dev, PTR_ERR(plat_dat),
                                     "failed to parse DT parameters\n");

        ret = sophgo_sg2044_dwmac_init(pdev, plat_dat, &stmmac_res);
        if (ret)
                return ret;

        data = device_get_match_data(&pdev->dev);
        if (data && data->has_internal_rx_delay) {
                plat_dat->phy_interface = phy_fix_phy_mode_for_mac_delays(plat_dat->phy_interface,
                                                                          false, true);
                if (plat_dat->phy_interface == PHY_INTERFACE_MODE_NA)
                        return -EINVAL;
        }

        return stmmac_dvr_probe(dev, plat_dat, &stmmac_res);
}

static const struct sophgo_dwmac_data sg2042_dwmac_data = {
        .has_internal_rx_delay = true,
};

static const struct of_device_id sophgo_dwmac_match[] = {
        { .compatible = "sophgo,sg2042-dwmac", .data = &sg2042_dwmac_data },
        { .compatible = "sophgo,sg2044-dwmac" },
        { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, sophgo_dwmac_match);

static struct platform_driver sophgo_dwmac_driver = {
        .probe  = sophgo_dwmac_probe,
        .remove = stmmac_pltfr_remove,
        .driver = {
                .name = "sophgo-dwmac",
                .pm = &stmmac_pltfr_pm_ops,
                .of_match_table = sophgo_dwmac_match,
        },
};
module_platform_driver(sophgo_dwmac_driver);

MODULE_AUTHOR("Inochi Amaoto <inochiama@gmail.com>");
MODULE_DESCRIPTION("Sophgo DWMAC platform driver");
MODULE_LICENSE("GPL");