1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
/* Texas Instruments Ethernet Switch Driver
*
* Copyright (C) 2013 Texas Instruments
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/phy.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include "cpsw.h"
/* AM33xx SoC specific definitions for the CONTROL port */
#define AM33XX_GMII_SEL_MODE_MII 0
#define AM33XX_GMII_SEL_MODE_RMII 1
#define AM33XX_GMII_SEL_MODE_RGMII 2
#define AM33XX_GMII_SEL_RMII2_IO_CLK_EN BIT(7)
#define AM33XX_GMII_SEL_RMII1_IO_CLK_EN BIT(6)
struct cpsw_phy_sel_priv {
struct device *dev;
u32 __iomem *gmii_sel;
bool rmii_clock_external;
void (*cpsw_phy_sel)(struct cpsw_phy_sel_priv *priv,
phy_interface_t phy_mode, int slave);
};
static void cpsw_gmii_sel_am3352(struct cpsw_phy_sel_priv *priv,
phy_interface_t phy_mode, int slave)
{
u32 reg;
u32 mask;
u32 mode = 0;
reg = readl(priv->gmii_sel);
switch (phy_mode) {
case PHY_INTERFACE_MODE_RMII:
mode = AM33XX_GMII_SEL_MODE_RMII;
break;
case PHY_INTERFACE_MODE_RGMII:
case PHY_INTERFACE_MODE_RGMII_ID:
case PHY_INTERFACE_MODE_RGMII_RXID:
case PHY_INTERFACE_MODE_RGMII_TXID:
mode = AM33XX_GMII_SEL_MODE_RGMII;
break;
case PHY_INTERFACE_MODE_MII:
default:
mode = AM33XX_GMII_SEL_MODE_MII;
break;
};
mask = 0x3 << (slave * 2) | BIT(slave + 6);
mode <<= slave * 2;
if (priv->rmii_clock_external) {
if (slave == 0)
mode |= AM33XX_GMII_SEL_RMII1_IO_CLK_EN;
else
mode |= AM33XX_GMII_SEL_RMII2_IO_CLK_EN;
}
reg &= ~mask;
reg |= mode;
writel(reg, priv->gmii_sel);
}
static struct platform_driver cpsw_phy_sel_driver;
static int match(struct device *dev, void *data)
{
struct device_node *node = (struct device_node *)data;
return dev->of_node == node &&
dev->driver == &cpsw_phy_sel_driver.driver;
}
void cpsw_phy_sel(struct device *dev, phy_interface_t phy_mode, int slave)
{
struct device_node *node;
struct cpsw_phy_sel_priv *priv;
node = of_get_child_by_name(dev->of_node, "cpsw-phy-sel");
if (!node) {
dev_err(dev, "Phy mode driver DT not found\n");
return;
}
dev = bus_find_device(&platform_bus_type, NULL, node, match);
priv = dev_get_drvdata(dev);
priv->cpsw_phy_sel(priv, phy_mode, slave);
}
EXPORT_SYMBOL_GPL(cpsw_phy_sel);
static const struct of_device_id cpsw_phy_sel_id_table[] = {
{
.compatible = "ti,am3352-cpsw-phy-sel",
.data = &cpsw_gmii_sel_am3352,
},
{}
};
MODULE_DEVICE_TABLE(of, cpsw_phy_sel_id_table);
static int cpsw_phy_sel_probe(struct platform_device *pdev)
{
struct resource *res;
const struct of_device_id *of_id;
struct cpsw_phy_sel_priv *priv;
of_id = of_match_node(cpsw_phy_sel_id_table, pdev->dev.of_node);
if (!of_id)
return -EINVAL;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv) {
dev_err(&pdev->dev, "unable to alloc memory for cpsw phy sel\n");
return -ENOMEM;
}
priv->cpsw_phy_sel = of_id->data;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "gmii-sel");
priv->gmii_sel = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(priv->gmii_sel))
return PTR_ERR(priv->gmii_sel);
if (of_find_property(pdev->dev.of_node, "rmii-clock-ext", NULL))
priv->rmii_clock_external = true;
dev_set_drvdata(&pdev->dev, priv);
return 0;
}
static struct platform_driver cpsw_phy_sel_driver = {
.probe = cpsw_phy_sel_probe,
.driver = {
.name = "cpsw-phy-sel",
.owner = THIS_MODULE,
.of_match_table = cpsw_phy_sel_id_table,
},
};
module_platform_driver(cpsw_phy_sel_driver);
MODULE_AUTHOR("Mugunthan V N <mugunthanvnm@ti.com>");
MODULE_LICENSE("GPL v2");
|
