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