1 /*
2 * drivers/net/phy/smsc.c
3 *
4 * Driver for SMSC PHYs
5 *
6 * Author: Herbert Valerio Riedel
7 *
8 * Copyright (c) 2006 Herbert Valerio Riedel <hvr@gnu.org>
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
14 *
15 * Support added for SMSC LAN8187 and LAN8700 by steve.glendinning@shawell.net
16 *
17 */
18
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/mii.h>
22 #include <linux/ethtool.h>
23 #include <linux/phy.h>
24 #include <linux/netdevice.h>
25 #include <linux/smscphy.h>
26
smsc_phy_config_intr(struct phy_device * phydev)27 static int smsc_phy_config_intr(struct phy_device *phydev)
28 {
29 int rc = phy_write (phydev, MII_LAN83C185_IM,
30 ((PHY_INTERRUPT_ENABLED == phydev->interrupts)
31 ? MII_LAN83C185_ISF_INT_PHYLIB_EVENTS
32 : 0));
33
34 return rc < 0 ? rc : 0;
35 }
36
smsc_phy_ack_interrupt(struct phy_device * phydev)37 static int smsc_phy_ack_interrupt(struct phy_device *phydev)
38 {
39 int rc = phy_read (phydev, MII_LAN83C185_ISF);
40
41 return rc < 0 ? rc : 0;
42 }
43
smsc_phy_config_init(struct phy_device * phydev)44 static int smsc_phy_config_init(struct phy_device *phydev)
45 {
46 int rc = phy_read(phydev, MII_LAN83C185_SPECIAL_MODES);
47 if (rc < 0)
48 return rc;
49
50 /* If the SMSC PHY is in power down mode, then set it
51 * in all capable mode before using it.
52 */
53 if ((rc & MII_LAN83C185_MODE_MASK) == MII_LAN83C185_MODE_POWERDOWN) {
54 int timeout = 50000;
55
56 /* set "all capable" mode and reset the phy */
57 rc |= MII_LAN83C185_MODE_ALL;
58 phy_write(phydev, MII_LAN83C185_SPECIAL_MODES, rc);
59 phy_write(phydev, MII_BMCR, BMCR_RESET);
60
61 /* wait end of reset (max 500 ms) */
62 do {
63 udelay(10);
64 if (timeout-- == 0)
65 return -1;
66 rc = phy_read(phydev, MII_BMCR);
67 } while (rc & BMCR_RESET);
68 }
69
70 rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
71 if (rc < 0)
72 return rc;
73
74 /* Enable energy detect mode for this SMSC Transceivers */
75 rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
76 rc | MII_LAN83C185_EDPWRDOWN);
77 if (rc < 0)
78 return rc;
79
80 return smsc_phy_ack_interrupt (phydev);
81 }
82
lan911x_config_init(struct phy_device * phydev)83 static int lan911x_config_init(struct phy_device *phydev)
84 {
85 return smsc_phy_ack_interrupt(phydev);
86 }
87
88 /*
89 * The LAN8710/LAN8720 requires a minimum of 2 link pulses within 64ms of each
90 * other in order to set the ENERGYON bit and exit EDPD mode. If a link partner
91 * does send the pulses within this interval, the PHY will remained powered
92 * down.
93 *
94 * This workaround will manually toggle the PHY on/off upon calls to read_status
95 * in order to generate link test pulses if the link is down. If a link partner
96 * is present, it will respond to the pulses, which will cause the ENERGYON bit
97 * to be set and will cause the EDPD mode to be exited.
98 */
lan87xx_read_status(struct phy_device * phydev)99 static int lan87xx_read_status(struct phy_device *phydev)
100 {
101 int err = genphy_read_status(phydev);
102
103 if (!phydev->link) {
104 /* Disable EDPD to wake up PHY */
105 int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
106 if (rc < 0)
107 return rc;
108
109 rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
110 rc & ~MII_LAN83C185_EDPWRDOWN);
111 if (rc < 0)
112 return rc;
113
114 /* Sleep 64 ms to allow ~5 link test pulses to be sent */
115 msleep(64);
116
117 /* Re-enable EDPD */
118 rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
119 if (rc < 0)
120 return rc;
121
122 rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
123 rc | MII_LAN83C185_EDPWRDOWN);
124 if (rc < 0)
125 return rc;
126 }
127
128 return err;
129 }
130
131 static struct phy_driver smsc_phy_driver[] = {
132 {
133 .phy_id = 0x0007c0a0, /* OUI=0x00800f, Model#=0x0a */
134 .phy_id_mask = 0xfffffff0,
135 .name = "SMSC LAN83C185",
136
137 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
138 | SUPPORTED_Asym_Pause),
139 .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
140
141 /* basic functions */
142 .config_aneg = genphy_config_aneg,
143 .read_status = genphy_read_status,
144 .config_init = smsc_phy_config_init,
145
146 /* IRQ related */
147 .ack_interrupt = smsc_phy_ack_interrupt,
148 .config_intr = smsc_phy_config_intr,
149
150 .suspend = genphy_suspend,
151 .resume = genphy_resume,
152
153 .driver = { .owner = THIS_MODULE, }
154 }, {
155 .phy_id = 0x0007c0b0, /* OUI=0x00800f, Model#=0x0b */
156 .phy_id_mask = 0xfffffff0,
157 .name = "SMSC LAN8187",
158
159 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
160 | SUPPORTED_Asym_Pause),
161 .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
162
163 /* basic functions */
164 .config_aneg = genphy_config_aneg,
165 .read_status = genphy_read_status,
166 .config_init = smsc_phy_config_init,
167
168 /* IRQ related */
169 .ack_interrupt = smsc_phy_ack_interrupt,
170 .config_intr = smsc_phy_config_intr,
171
172 .suspend = genphy_suspend,
173 .resume = genphy_resume,
174
175 .driver = { .owner = THIS_MODULE, }
176 }, {
177 .phy_id = 0x0007c0c0, /* OUI=0x00800f, Model#=0x0c */
178 .phy_id_mask = 0xfffffff0,
179 .name = "SMSC LAN8700",
180
181 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
182 | SUPPORTED_Asym_Pause),
183 .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
184
185 /* basic functions */
186 .config_aneg = genphy_config_aneg,
187 .read_status = genphy_read_status,
188 .config_init = smsc_phy_config_init,
189
190 /* IRQ related */
191 .ack_interrupt = smsc_phy_ack_interrupt,
192 .config_intr = smsc_phy_config_intr,
193
194 .suspend = genphy_suspend,
195 .resume = genphy_resume,
196
197 .driver = { .owner = THIS_MODULE, }
198 }, {
199 .phy_id = 0x0007c0d0, /* OUI=0x00800f, Model#=0x0d */
200 .phy_id_mask = 0xfffffff0,
201 .name = "SMSC LAN911x Internal PHY",
202
203 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
204 | SUPPORTED_Asym_Pause),
205 .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
206
207 /* basic functions */
208 .config_aneg = genphy_config_aneg,
209 .read_status = genphy_read_status,
210 .config_init = lan911x_config_init,
211
212 /* IRQ related */
213 .ack_interrupt = smsc_phy_ack_interrupt,
214 .config_intr = smsc_phy_config_intr,
215
216 .suspend = genphy_suspend,
217 .resume = genphy_resume,
218
219 .driver = { .owner = THIS_MODULE, }
220 }, {
221 .phy_id = 0x0007c0f0, /* OUI=0x00800f, Model#=0x0f */
222 .phy_id_mask = 0xfffffff0,
223 .name = "SMSC LAN8710/LAN8720",
224
225 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
226 | SUPPORTED_Asym_Pause),
227 .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
228
229 /* basic functions */
230 .config_aneg = genphy_config_aneg,
231 .read_status = lan87xx_read_status,
232 .config_init = smsc_phy_config_init,
233
234 /* IRQ related */
235 .ack_interrupt = smsc_phy_ack_interrupt,
236 .config_intr = smsc_phy_config_intr,
237
238 .suspend = genphy_suspend,
239 .resume = genphy_resume,
240
241 .driver = { .owner = THIS_MODULE, }
242 } };
243
smsc_init(void)244 static int __init smsc_init(void)
245 {
246 return phy_drivers_register(smsc_phy_driver,
247 ARRAY_SIZE(smsc_phy_driver));
248 }
249
smsc_exit(void)250 static void __exit smsc_exit(void)
251 {
252 return phy_drivers_unregister(smsc_phy_driver,
253 ARRAY_SIZE(smsc_phy_driver));
254 }
255
256 MODULE_DESCRIPTION("SMSC PHY driver");
257 MODULE_AUTHOR("Herbert Valerio Riedel");
258 MODULE_LICENSE("GPL");
259
260 module_init(smsc_init);
261 module_exit(smsc_exit);
262
263 static struct mdio_device_id __maybe_unused smsc_tbl[] = {
264 { 0x0007c0a0, 0xfffffff0 },
265 { 0x0007c0b0, 0xfffffff0 },
266 { 0x0007c0c0, 0xfffffff0 },
267 { 0x0007c0d0, 0xfffffff0 },
268 { 0x0007c0f0, 0xfffffff0 },
269 { }
270 };
271
272 MODULE_DEVICE_TABLE(mdio, smsc_tbl);
273