Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * Copyright (C) 2015 Microchip Technology
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
16 */
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/mii.h>
20#include <linux/ethtool.h>
21#include <linux/phy.h>
22#include <linux/microchipphy.h>
23
24#define DRIVER_AUTHOR "WOOJUNG HUH <woojung.huh@microchip.com>"
25#define DRIVER_DESC "Microchip LAN88XX PHY driver"
26
27struct lan88xx_priv {
28 int chip_id;
29 int chip_rev;
30 __u32 wolopts;
31};
32
33static int lan88xx_phy_config_intr(struct phy_device *phydev)
34{
35 int rc;
36
37 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
38 /* unmask all source and clear them before enable */
39 rc = phy_write(phydev, LAN88XX_INT_MASK, 0x7FFF);
40 rc = phy_read(phydev, LAN88XX_INT_STS);
41 rc = phy_write(phydev, LAN88XX_INT_MASK,
42 LAN88XX_INT_MASK_MDINTPIN_EN_ |
43 LAN88XX_INT_MASK_LINK_CHANGE_);
44 } else {
45 rc = phy_write(phydev, LAN88XX_INT_MASK, 0);
46 }
47
48 return rc < 0 ? rc : 0;
49}
50
51static int lan88xx_phy_ack_interrupt(struct phy_device *phydev)
52{
53 int rc = phy_read(phydev, LAN88XX_INT_STS);
54
55 return rc < 0 ? rc : 0;
56}
57
58static int lan88xx_suspend(struct phy_device *phydev)
59{
60 struct lan88xx_priv *priv = phydev->priv;
61
62 /* do not power down PHY when WOL is enabled */
63 if (!priv->wolopts)
64 genphy_suspend(phydev);
65
66 return 0;
67}
68
69static int lan88xx_probe(struct phy_device *phydev)
70{
71 struct device *dev = &phydev->mdio.dev;
72 struct lan88xx_priv *priv;
73
74 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
75 if (!priv)
76 return -ENOMEM;
77
78 priv->wolopts = 0;
79
80 /* these values can be used to identify internal PHY */
81 priv->chip_id = phy_read_mmd_indirect(phydev, LAN88XX_MMD3_CHIP_ID, 3);
82 priv->chip_rev = phy_read_mmd_indirect(phydev, LAN88XX_MMD3_CHIP_REV,
83 3);
84
85 phydev->priv = priv;
86
87 return 0;
88}
89
90static void lan88xx_remove(struct phy_device *phydev)
91{
92 struct device *dev = &phydev->mdio.dev;
93 struct lan88xx_priv *priv = phydev->priv;
94
95 if (priv)
96 devm_kfree(dev, priv);
97}
98
99static int lan88xx_set_wol(struct phy_device *phydev,
100 struct ethtool_wolinfo *wol)
101{
102 struct lan88xx_priv *priv = phydev->priv;
103
104 priv->wolopts = wol->wolopts;
105
106 return 0;
107}
108
109static void lan88xx_set_mdix(struct phy_device *phydev)
110{
111 int buf;
112 int val;
113
114 switch (phydev->mdix_ctrl) {
115 case ETH_TP_MDI:
116 val = LAN88XX_EXT_MODE_CTRL_MDI_;
117 break;
118 case ETH_TP_MDI_X:
119 val = LAN88XX_EXT_MODE_CTRL_MDI_X_;
120 break;
121 case ETH_TP_MDI_AUTO:
122 val = LAN88XX_EXT_MODE_CTRL_AUTO_MDIX_;
123 break;
124 default:
125 return;
126 }
127
128 phy_write(phydev, LAN88XX_EXT_PAGE_ACCESS, LAN88XX_EXT_PAGE_SPACE_1);
129 buf = phy_read(phydev, LAN88XX_EXT_MODE_CTRL);
130 buf &= ~LAN88XX_EXT_MODE_CTRL_MDIX_MASK_;
131 buf |= val;
132 phy_write(phydev, LAN88XX_EXT_MODE_CTRL, buf);
133 phy_write(phydev, LAN88XX_EXT_PAGE_ACCESS, LAN88XX_EXT_PAGE_SPACE_0);
134}
135
136static int lan88xx_config_aneg(struct phy_device *phydev)
137{
138 lan88xx_set_mdix(phydev);
139
140 return genphy_config_aneg(phydev);
141}
142
143static struct phy_driver microchip_phy_driver[] = {
144{
145 .phy_id = 0x0007c130,
146 .phy_id_mask = 0xfffffff0,
147 .name = "Microchip LAN88xx",
148
149 .features = PHY_GBIT_FEATURES,
150 .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
151
152 .probe = lan88xx_probe,
153 .remove = lan88xx_remove,
154
155 .config_init = genphy_config_init,
156 .config_aneg = lan88xx_config_aneg,
157 .read_status = genphy_read_status,
158
159 .ack_interrupt = lan88xx_phy_ack_interrupt,
160 .config_intr = lan88xx_phy_config_intr,
161
162 .suspend = lan88xx_suspend,
163 .resume = genphy_resume,
164 .set_wol = lan88xx_set_wol,
165} };
166
167module_phy_driver(microchip_phy_driver);
168
169static struct mdio_device_id __maybe_unused microchip_tbl[] = {
170 { 0x0007c130, 0xfffffff0 },
171 { }
172};
173
174MODULE_DEVICE_TABLE(mdio, microchip_tbl);
175
176MODULE_AUTHOR(DRIVER_AUTHOR);
177MODULE_DESCRIPTION(DRIVER_DESC);
178MODULE_LICENSE("GPL");