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
25struct meson_dwmac {
26	struct device	*dev;
27	void __iomem	*reg;
28};
29
30static 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
49static 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
66const struct stmmac_of_data meson6_dwmac_data = {
67	.setup		= meson6_dwmac_setup,
68	.fix_mac_speed	= meson6_dwmac_fix_mac_speed,
69};
70