// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Amlogic Meson6 and Meson8 DWMAC glue layer
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*
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* Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com>
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*/
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#include <linux/device.h>
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#include <linux/ethtool.h>
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#include <linux/io.h>
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#include <linux/ioport.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/stmmac.h>
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#include "stmmac_platform.h"
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#define ETHMAC_SPEED_100 BIT(1)
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struct meson_dwmac {
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struct device *dev;
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void __iomem *reg;
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};
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static void meson6_dwmac_fix_mac_speed(void *priv, unsigned int speed)
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{
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struct meson_dwmac *dwmac = priv;
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unsigned int val;
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val = readl(dwmac->reg);
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switch (speed) {
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case SPEED_10:
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val &= ~ETHMAC_SPEED_100;
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break;
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case SPEED_100:
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val |= ETHMAC_SPEED_100;
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break;
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}
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writel(val, dwmac->reg);
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}
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static int meson6_dwmac_probe(struct platform_device *pdev)
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{
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struct plat_stmmacenet_data *plat_dat;
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struct stmmac_resources stmmac_res;
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struct meson_dwmac *dwmac;
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int ret;
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ret = stmmac_get_platform_resources(pdev, &stmmac_res);
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if (ret)
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return ret;
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plat_dat = stmmac_probe_config_dt(pdev, &stmmac_res.mac);
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if (IS_ERR(plat_dat))
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return PTR_ERR(plat_dat);
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dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
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if (!dwmac) {
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ret = -ENOMEM;
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goto err_remove_config_dt;
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}
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dwmac->reg = devm_platform_ioremap_resource(pdev, 1);
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if (IS_ERR(dwmac->reg)) {
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ret = PTR_ERR(dwmac->reg);
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goto err_remove_config_dt;
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}
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plat_dat->bsp_priv = dwmac;
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plat_dat->fix_mac_speed = meson6_dwmac_fix_mac_speed;
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ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
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if (ret)
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goto err_remove_config_dt;
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return 0;
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err_remove_config_dt:
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stmmac_remove_config_dt(pdev, plat_dat);
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return ret;
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}
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static const struct of_device_id meson6_dwmac_match[] = {
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{ .compatible = "amlogic,meson6-dwmac" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, meson6_dwmac_match);
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static struct platform_driver meson6_dwmac_driver = {
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.probe = meson6_dwmac_probe,
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.remove = stmmac_pltfr_remove,
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.driver = {
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.name = "meson6-dwmac",
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.pm = &stmmac_pltfr_pm_ops,
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.of_match_table = meson6_dwmac_match,
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},
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};
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module_platform_driver(meson6_dwmac_driver);
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MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>");
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MODULE_DESCRIPTION("Amlogic Meson6 and Meson8 DWMAC glue layer");
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MODULE_LICENSE("GPL v2");
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