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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/*
* Copyright (C) 2015 Microchip Technology
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <linux/microchipphy.h>
#define DRIVER_AUTHOR "WOOJUNG HUH <woojung.huh@microchip.com>"
#define DRIVER_DESC "Microchip LAN88XX PHY driver"
struct lan88xx_priv {
int chip_id;
int chip_rev;
__u32 wolopts;
};
static int lan88xx_phy_config_intr(struct phy_device *phydev)
{
int rc;
if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
/* unmask all source and clear them before enable */
rc = phy_write(phydev, LAN88XX_INT_MASK, 0x7FFF);
rc = phy_read(phydev, LAN88XX_INT_STS);
rc = phy_write(phydev, LAN88XX_INT_MASK,
LAN88XX_INT_MASK_MDINTPIN_EN_ |
LAN88XX_INT_MASK_LINK_CHANGE_);
} else {
rc = phy_write(phydev, LAN88XX_INT_MASK, 0);
}
return rc < 0 ? rc : 0;
}
static int lan88xx_phy_ack_interrupt(struct phy_device *phydev)
{
int rc = phy_read(phydev, LAN88XX_INT_STS);
return rc < 0 ? rc : 0;
}
static int lan88xx_suspend(struct phy_device *phydev)
{
struct lan88xx_priv *priv = phydev->priv;
/* do not power down PHY when WOL is enabled */
if (!priv->wolopts)
genphy_suspend(phydev);
return 0;
}
static int lan88xx_probe(struct phy_device *phydev)
{
struct device *dev = &phydev->mdio.dev;
struct lan88xx_priv *priv;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->wolopts = 0;
/* these values can be used to identify internal PHY */
priv->chip_id = phy_read_mmd_indirect(phydev, LAN88XX_MMD3_CHIP_ID, 3);
priv->chip_rev = phy_read_mmd_indirect(phydev, LAN88XX_MMD3_CHIP_REV,
3);
phydev->priv = priv;
return 0;
}
static void lan88xx_remove(struct phy_device *phydev)
{
struct device *dev = &phydev->mdio.dev;
struct lan88xx_priv *priv = phydev->priv;
if (priv)
devm_kfree(dev, priv);
}
static int lan88xx_set_wol(struct phy_device *phydev,
struct ethtool_wolinfo *wol)
{
struct lan88xx_priv *priv = phydev->priv;
priv->wolopts = wol->wolopts;
return 0;
}
static void lan88xx_set_mdix(struct phy_device *phydev)
{
int buf;
int val;
switch (phydev->mdix) {
case ETH_TP_MDI:
val = LAN88XX_EXT_MODE_CTRL_MDI_;
break;
case ETH_TP_MDI_X:
val = LAN88XX_EXT_MODE_CTRL_MDI_X_;
break;
case ETH_TP_MDI_AUTO:
val = LAN88XX_EXT_MODE_CTRL_AUTO_MDIX_;
break;
default:
return;
}
phy_write(phydev, LAN88XX_EXT_PAGE_ACCESS, LAN88XX_EXT_PAGE_SPACE_1);
buf = phy_read(phydev, LAN88XX_EXT_MODE_CTRL);
buf &= ~LAN88XX_EXT_MODE_CTRL_MDIX_MASK_;
buf |= val;
phy_write(phydev, LAN88XX_EXT_MODE_CTRL, buf);
phy_write(phydev, LAN88XX_EXT_PAGE_ACCESS, LAN88XX_EXT_PAGE_SPACE_0);
}
static int lan88xx_config_aneg(struct phy_device *phydev)
{
lan88xx_set_mdix(phydev);
return genphy_config_aneg(phydev);
}
static struct phy_driver microchip_phy_driver[] = {
{
.phy_id = 0x0007c130,
.phy_id_mask = 0xfffffff0,
.name = "Microchip LAN88xx",
.features = (PHY_GBIT_FEATURES |
SUPPORTED_Pause | SUPPORTED_Asym_Pause),
.flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
.probe = lan88xx_probe,
.remove = lan88xx_remove,
.config_init = genphy_config_init,
.config_aneg = lan88xx_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = lan88xx_phy_ack_interrupt,
.config_intr = lan88xx_phy_config_intr,
.suspend = lan88xx_suspend,
.resume = genphy_resume,
.set_wol = lan88xx_set_wol,
} };
module_phy_driver(microchip_phy_driver);
static struct mdio_device_id __maybe_unused microchip_tbl[] = {
{ 0x0007c130, 0xfffffff0 },
{ }
};
MODULE_DEVICE_TABLE(mdio, microchip_tbl);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
|
