2 * Amlogic Meson DWMAC glue layer
4 * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * You should have received a copy of the GNU General Public License
11 * along with this program. If not, see <http://www.gnu.org/licenses/>.
14 #include <linux/device.h>
15 #include <linux/ethtool.h>
17 #include <linux/ioport.h>
18 #include <linux/module.h>
19 #include <linux/platform_device.h>
20 #include <linux/stmmac.h>
22 #include "stmmac_platform.h"
24 #define ETHMAC_SPEED_100 BIT(1)
31 static void meson6_dwmac_fix_mac_speed(void *priv, unsigned int speed)
33 struct meson_dwmac *dwmac = priv;
36 val = readl(dwmac->reg);
40 val &= ~ETHMAC_SPEED_100;
43 val |= ETHMAC_SPEED_100;
47 writel(val, dwmac->reg);
50 static void *meson6_dwmac_setup(struct platform_device *pdev)
52 struct meson_dwmac *dwmac;
55 dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
57 return ERR_PTR(-ENOMEM);
59 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
60 dwmac->reg = devm_ioremap_resource(&pdev->dev, res);
61 if (IS_ERR(dwmac->reg))
62 return ERR_CAST(dwmac->reg);
67 static const struct stmmac_of_data meson6_dwmac_data = {
68 .setup = meson6_dwmac_setup,
69 .fix_mac_speed = meson6_dwmac_fix_mac_speed,
72 static const struct of_device_id meson6_dwmac_match[] = {
73 { .compatible = "amlogic,meson6-dwmac", .data = &meson6_dwmac_data},
76 MODULE_DEVICE_TABLE(of, meson6_dwmac_match);
78 static struct platform_driver meson6_dwmac_driver = {
79 .probe = stmmac_pltfr_probe,
80 .remove = stmmac_pltfr_remove,
82 .name = "meson6-dwmac",
83 .pm = &stmmac_pltfr_pm_ops,
84 .of_match_table = meson6_dwmac_match,
87 module_platform_driver(meson6_dwmac_driver);
89 MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>");
90 MODULE_DESCRIPTION("Amlogic Meson DWMAC glue layer");
91 MODULE_LICENSE("GPL v2");