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