1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Amlogic Meson6 and Meson8 DWMAC glue layer
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com>
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/device.h>
9*4882a593Smuzhiyun #include <linux/ethtool.h>
10*4882a593Smuzhiyun #include <linux/io.h>
11*4882a593Smuzhiyun #include <linux/ioport.h>
12*4882a593Smuzhiyun #include <linux/module.h>
13*4882a593Smuzhiyun #include <linux/platform_device.h>
14*4882a593Smuzhiyun #include <linux/stmmac.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #include "stmmac_platform.h"
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun #define ETHMAC_SPEED_100 BIT(1)
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun struct meson_dwmac {
21*4882a593Smuzhiyun struct device *dev;
22*4882a593Smuzhiyun void __iomem *reg;
23*4882a593Smuzhiyun };
24*4882a593Smuzhiyun
meson6_dwmac_fix_mac_speed(void * priv,unsigned int speed)25*4882a593Smuzhiyun static void meson6_dwmac_fix_mac_speed(void *priv, unsigned int speed)
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun struct meson_dwmac *dwmac = priv;
28*4882a593Smuzhiyun unsigned int val;
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun val = readl(dwmac->reg);
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun switch (speed) {
33*4882a593Smuzhiyun case SPEED_10:
34*4882a593Smuzhiyun val &= ~ETHMAC_SPEED_100;
35*4882a593Smuzhiyun break;
36*4882a593Smuzhiyun case SPEED_100:
37*4882a593Smuzhiyun val |= ETHMAC_SPEED_100;
38*4882a593Smuzhiyun break;
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun writel(val, dwmac->reg);
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun
meson6_dwmac_probe(struct platform_device * pdev)44*4882a593Smuzhiyun static int meson6_dwmac_probe(struct platform_device *pdev)
45*4882a593Smuzhiyun {
46*4882a593Smuzhiyun struct plat_stmmacenet_data *plat_dat;
47*4882a593Smuzhiyun struct stmmac_resources stmmac_res;
48*4882a593Smuzhiyun struct meson_dwmac *dwmac;
49*4882a593Smuzhiyun int ret;
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun ret = stmmac_get_platform_resources(pdev, &stmmac_res);
52*4882a593Smuzhiyun if (ret)
53*4882a593Smuzhiyun return ret;
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun plat_dat = stmmac_probe_config_dt(pdev, &stmmac_res.mac);
56*4882a593Smuzhiyun if (IS_ERR(plat_dat))
57*4882a593Smuzhiyun return PTR_ERR(plat_dat);
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
60*4882a593Smuzhiyun if (!dwmac) {
61*4882a593Smuzhiyun ret = -ENOMEM;
62*4882a593Smuzhiyun goto err_remove_config_dt;
63*4882a593Smuzhiyun }
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun dwmac->reg = devm_platform_ioremap_resource(pdev, 1);
66*4882a593Smuzhiyun if (IS_ERR(dwmac->reg)) {
67*4882a593Smuzhiyun ret = PTR_ERR(dwmac->reg);
68*4882a593Smuzhiyun goto err_remove_config_dt;
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun plat_dat->bsp_priv = dwmac;
72*4882a593Smuzhiyun plat_dat->fix_mac_speed = meson6_dwmac_fix_mac_speed;
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
75*4882a593Smuzhiyun if (ret)
76*4882a593Smuzhiyun goto err_remove_config_dt;
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun return 0;
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun err_remove_config_dt:
81*4882a593Smuzhiyun stmmac_remove_config_dt(pdev, plat_dat);
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun return ret;
84*4882a593Smuzhiyun }
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun static const struct of_device_id meson6_dwmac_match[] = {
87*4882a593Smuzhiyun { .compatible = "amlogic,meson6-dwmac" },
88*4882a593Smuzhiyun { }
89*4882a593Smuzhiyun };
90*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, meson6_dwmac_match);
91*4882a593Smuzhiyun
92*4882a593Smuzhiyun static struct platform_driver meson6_dwmac_driver = {
93*4882a593Smuzhiyun .probe = meson6_dwmac_probe,
94*4882a593Smuzhiyun .remove = stmmac_pltfr_remove,
95*4882a593Smuzhiyun .driver = {
96*4882a593Smuzhiyun .name = "meson6-dwmac",
97*4882a593Smuzhiyun .pm = &stmmac_pltfr_pm_ops,
98*4882a593Smuzhiyun .of_match_table = meson6_dwmac_match,
99*4882a593Smuzhiyun },
100*4882a593Smuzhiyun };
101*4882a593Smuzhiyun module_platform_driver(meson6_dwmac_driver);
102*4882a593Smuzhiyun
103*4882a593Smuzhiyun MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>");
104*4882a593Smuzhiyun MODULE_DESCRIPTION("Amlogic Meson6 and Meson8 DWMAC glue layer");
105*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
106