1 /*
2 * Amlogic Meson 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/platform_device.h>
19 #include <linux/stmmac.h>
20
21 #include "stmmac_platform.h"
22
23 #define ETHMAC_SPEED_100 BIT(1)
24
25 struct meson_dwmac {
26 struct device *dev;
27 void __iomem *reg;
28 };
29
meson6_dwmac_fix_mac_speed(void * priv,unsigned int speed)30 static void meson6_dwmac_fix_mac_speed(void *priv, unsigned int speed)
31 {
32 struct meson_dwmac *dwmac = priv;
33 unsigned int val;
34
35 val = readl(dwmac->reg);
36
37 switch (speed) {
38 case SPEED_10:
39 val &= ~ETHMAC_SPEED_100;
40 break;
41 case SPEED_100:
42 val |= ETHMAC_SPEED_100;
43 break;
44 }
45
46 writel(val, dwmac->reg);
47 }
48
meson6_dwmac_setup(struct platform_device * pdev)49 static void *meson6_dwmac_setup(struct platform_device *pdev)
50 {
51 struct meson_dwmac *dwmac;
52 struct resource *res;
53
54 dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
55 if (!dwmac)
56 return ERR_PTR(-ENOMEM);
57
58 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
59 dwmac->reg = devm_ioremap_resource(&pdev->dev, res);
60 if (IS_ERR(dwmac->reg))
61 return ERR_CAST(dwmac->reg);
62
63 return dwmac;
64 }
65
66 const struct stmmac_of_data meson6_dwmac_data = {
67 .setup = meson6_dwmac_setup,
68 .fix_mac_speed = meson6_dwmac_fix_mac_speed,
69 };
70