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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
|
/*
* drivers/net/phy/smsc.c
*
* Driver for SMSC PHYs
*
* Author: Herbert Valerio Riedel
*
* Copyright (c) 2006 Herbert Valerio Riedel <hvr@gnu.org>
*
* 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.
*
* Support added for SMSC LAN8187 and LAN8700 by steve.glendinning@shawell.net
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <linux/netdevice.h>
#include <linux/smscphy.h>
static int smsc_phy_config_intr(struct phy_device *phydev)
{
int rc = phy_write (phydev, MII_LAN83C185_IM,
((PHY_INTERRUPT_ENABLED == phydev->interrupts)
? MII_LAN83C185_ISF_INT_PHYLIB_EVENTS
: 0));
return rc < 0 ? rc : 0;
}
static int smsc_phy_ack_interrupt(struct phy_device *phydev)
{
int rc = phy_read (phydev, MII_LAN83C185_ISF);
return rc < 0 ? rc : 0;
}
static int smsc_phy_config_init(struct phy_device *phydev)
{
int __maybe_unused len;
struct device *dev __maybe_unused = &phydev->dev;
struct device_node *of_node __maybe_unused = dev->of_node;
int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
int enable_energy = 1;
if (rc < 0)
return rc;
if (of_find_property(of_node, "smsc,disable-energy-detect", &len))
enable_energy = 0;
if (enable_energy) {
/* Enable energy detect mode for this SMSC Transceivers */
rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
rc | MII_LAN83C185_EDPWRDOWN);
if (rc < 0)
return rc;
}
return smsc_phy_ack_interrupt(phydev);
}
static int smsc_phy_reset(struct phy_device *phydev)
{
int rc = phy_read(phydev, MII_LAN83C185_SPECIAL_MODES);
if (rc < 0)
return rc;
/* If the SMSC PHY is in power down mode, then set it
* in all capable mode before using it.
*/
if ((rc & MII_LAN83C185_MODE_MASK) == MII_LAN83C185_MODE_POWERDOWN) {
int timeout = 50000;
/* set "all capable" mode and reset the phy */
rc |= MII_LAN83C185_MODE_ALL;
phy_write(phydev, MII_LAN83C185_SPECIAL_MODES, rc);
phy_write(phydev, MII_BMCR, BMCR_RESET);
/* wait end of reset (max 500 ms) */
do {
udelay(10);
if (timeout-- == 0)
return -1;
rc = phy_read(phydev, MII_BMCR);
} while (rc & BMCR_RESET);
}
return 0;
}
static int lan911x_config_init(struct phy_device *phydev)
{
return smsc_phy_ack_interrupt(phydev);
}
/*
* The LAN87xx suffers from rare absence of the ENERGYON-bit when Ethernet cable
* plugs in while LAN87xx is in Energy Detect Power-Down mode. This leads to
* unstable detection of plugging in Ethernet cable.
* This workaround disables Energy Detect Power-Down mode and waiting for
* response on link pulses to detect presence of plugged Ethernet cable.
* The Energy Detect Power-Down mode is enabled again in the end of procedure to
* save approximately 220 mW of power if cable is unplugged.
*/
static int lan87xx_read_status(struct phy_device *phydev)
{
int err = genphy_read_status(phydev);
int i;
if (!phydev->link) {
/* Disable EDPD to wake up PHY */
int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
if (rc < 0)
return rc;
rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
rc & ~MII_LAN83C185_EDPWRDOWN);
if (rc < 0)
return rc;
/* Wait max 640 ms to detect energy */
for (i = 0; i < 64; i++) {
/* Sleep to allow link test pulses to be sent */
msleep(10);
rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
if (rc < 0)
return rc;
if (rc & MII_LAN83C185_ENERGYON)
break;
}
/* Re-enable EDPD */
rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
if (rc < 0)
return rc;
rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
rc | MII_LAN83C185_EDPWRDOWN);
if (rc < 0)
return rc;
}
return err;
}
static struct phy_driver smsc_phy_driver[] = {
{
.phy_id = 0x0007c0a0, /* OUI=0x00800f, Model#=0x0a */
.phy_id_mask = 0xfffffff0,
.name = "SMSC LAN83C185",
.features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
| SUPPORTED_Asym_Pause),
.flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
/* basic functions */
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.config_init = smsc_phy_config_init,
.soft_reset = smsc_phy_reset,
/* IRQ related */
.ack_interrupt = smsc_phy_ack_interrupt,
.config_intr = smsc_phy_config_intr,
.suspend = genphy_suspend,
.resume = genphy_resume,
.driver = { .owner = THIS_MODULE, }
}, {
.phy_id = 0x0007c0b0, /* OUI=0x00800f, Model#=0x0b */
.phy_id_mask = 0xfffffff0,
.name = "SMSC LAN8187",
.features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
| SUPPORTED_Asym_Pause),
.flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
/* basic functions */
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.config_init = smsc_phy_config_init,
.soft_reset = smsc_phy_reset,
/* IRQ related */
.ack_interrupt = smsc_phy_ack_interrupt,
.config_intr = smsc_phy_config_intr,
.suspend = genphy_suspend,
.resume = genphy_resume,
.driver = { .owner = THIS_MODULE, }
}, {
.phy_id = 0x0007c0c0, /* OUI=0x00800f, Model#=0x0c */
.phy_id_mask = 0xfffffff0,
.name = "SMSC LAN8700",
.features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
| SUPPORTED_Asym_Pause),
.flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
/* basic functions */
.config_aneg = genphy_config_aneg,
.read_status = lan87xx_read_status,
.config_init = smsc_phy_config_init,
.soft_reset = smsc_phy_reset,
/* IRQ related */
.ack_interrupt = smsc_phy_ack_interrupt,
.config_intr = smsc_phy_config_intr,
.suspend = genphy_suspend,
.resume = genphy_resume,
.driver = { .owner = THIS_MODULE, }
}, {
.phy_id = 0x0007c0d0, /* OUI=0x00800f, Model#=0x0d */
.phy_id_mask = 0xfffffff0,
.name = "SMSC LAN911x Internal PHY",
.features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
| SUPPORTED_Asym_Pause),
.flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
/* basic functions */
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.config_init = lan911x_config_init,
/* IRQ related */
.ack_interrupt = smsc_phy_ack_interrupt,
.config_intr = smsc_phy_config_intr,
.suspend = genphy_suspend,
.resume = genphy_resume,
.driver = { .owner = THIS_MODULE, }
}, {
.phy_id = 0x0007c0f0, /* OUI=0x00800f, Model#=0x0f */
.phy_id_mask = 0xfffffff0,
.name = "SMSC LAN8710/LAN8720",
.features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
| SUPPORTED_Asym_Pause),
.flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
/* basic functions */
.config_aneg = genphy_config_aneg,
.read_status = lan87xx_read_status,
.config_init = smsc_phy_config_init,
.soft_reset = smsc_phy_reset,
/* IRQ related */
.ack_interrupt = smsc_phy_ack_interrupt,
.config_intr = smsc_phy_config_intr,
.suspend = genphy_suspend,
.resume = genphy_resume,
.driver = { .owner = THIS_MODULE, }
} };
module_phy_driver(smsc_phy_driver);
MODULE_DESCRIPTION("SMSC PHY driver");
MODULE_AUTHOR("Herbert Valerio Riedel");
MODULE_LICENSE("GPL");
static struct mdio_device_id __maybe_unused smsc_tbl[] = {
{ 0x0007c0a0, 0xfffffff0 },
{ 0x0007c0b0, 0xfffffff0 },
{ 0x0007c0c0, 0xfffffff0 },
{ 0x0007c0d0, 0xfffffff0 },
{ 0x0007c0f0, 0xfffffff0 },
{ }
};
MODULE_DEVICE_TABLE(mdio, smsc_tbl);
|
