Merge remote-tracking branches 'asoc/fix/rt5663', 'asoc/fix/samsung', 'asoc/fix/sti...
[sfrench/cifs-2.6.git] / drivers / net / ethernet / stmicro / stmmac / dwmac-meson.c
1 /*
2  * Amlogic Meson6 and Meson8 DWMAC glue layer
3  *
4  * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com>
5  *
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.
9  *
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/>.
12  */
13
14 #include <linux/device.h>
15 #include <linux/ethtool.h>
16 #include <linux/io.h>
17 #include <linux/ioport.h>
18 #include <linux/module.h>
19 #include <linux/platform_device.h>
20 #include <linux/stmmac.h>
21
22 #include "stmmac_platform.h"
23
24 #define ETHMAC_SPEED_100        BIT(1)
25
26 struct meson_dwmac {
27         struct device   *dev;
28         void __iomem    *reg;
29 };
30
31 static void meson6_dwmac_fix_mac_speed(void *priv, unsigned int speed)
32 {
33         struct meson_dwmac *dwmac = priv;
34         unsigned int val;
35
36         val = readl(dwmac->reg);
37
38         switch (speed) {
39         case SPEED_10:
40                 val &= ~ETHMAC_SPEED_100;
41                 break;
42         case SPEED_100:
43                 val |= ETHMAC_SPEED_100;
44                 break;
45         }
46
47         writel(val, dwmac->reg);
48 }
49
50 static int meson6_dwmac_probe(struct platform_device *pdev)
51 {
52         struct plat_stmmacenet_data *plat_dat;
53         struct stmmac_resources stmmac_res;
54         struct meson_dwmac *dwmac;
55         struct resource *res;
56         int ret;
57
58         ret = stmmac_get_platform_resources(pdev, &stmmac_res);
59         if (ret)
60                 return ret;
61
62         plat_dat = stmmac_probe_config_dt(pdev, &stmmac_res.mac);
63         if (IS_ERR(plat_dat))
64                 return PTR_ERR(plat_dat);
65
66         dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
67         if (!dwmac)
68                 return -ENOMEM;
69
70         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
71         dwmac->reg = devm_ioremap_resource(&pdev->dev, res);
72         if (IS_ERR(dwmac->reg))
73                 return PTR_ERR(dwmac->reg);
74
75         plat_dat->bsp_priv = dwmac;
76         plat_dat->fix_mac_speed = meson6_dwmac_fix_mac_speed;
77
78         return stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
79 }
80
81 static const struct of_device_id meson6_dwmac_match[] = {
82         { .compatible = "amlogic,meson6-dwmac" },
83         { }
84 };
85 MODULE_DEVICE_TABLE(of, meson6_dwmac_match);
86
87 static struct platform_driver meson6_dwmac_driver = {
88         .probe  = meson6_dwmac_probe,
89         .remove = stmmac_pltfr_remove,
90         .driver = {
91                 .name           = "meson6-dwmac",
92                 .pm             = &stmmac_pltfr_pm_ops,
93                 .of_match_table = meson6_dwmac_match,
94         },
95 };
96 module_platform_driver(meson6_dwmac_driver);
97
98 MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>");
99 MODULE_DESCRIPTION("Amlogic Meson6 and Meson8 DWMAC glue layer");
100 MODULE_LICENSE("GPL v2");