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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@smsc.com
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
26#define MII_LAN83C185_ISF 29 /* Interrupt Source Flags */
27#define MII_LAN83C185_IM 30 /* Interrupt Mask */
28#define MII_LAN83C185_CTRL_STATUS 17 /* Mode/Status Register */
29
30#define MII_LAN83C185_ISF_INT1 (1<<1) /* Auto-Negotiation Page Received */
31#define MII_LAN83C185_ISF_INT2 (1<<2) /* Parallel Detection Fault */
32#define MII_LAN83C185_ISF_INT3 (1<<3) /* Auto-Negotiation LP Ack */
33#define MII_LAN83C185_ISF_INT4 (1<<4) /* Link Down */
34#define MII_LAN83C185_ISF_INT5 (1<<5) /* Remote Fault Detected */
35#define MII_LAN83C185_ISF_INT6 (1<<6) /* Auto-Negotiation complete */
36#define MII_LAN83C185_ISF_INT7 (1<<7) /* ENERGYON */
37
38#define MII_LAN83C185_ISF_INT_ALL (0x0e)
39
40#define MII_LAN83C185_ISF_INT_PHYLIB_EVENTS \
41 (MII_LAN83C185_ISF_INT6 | MII_LAN83C185_ISF_INT4 | \
42 MII_LAN83C185_ISF_INT7)
43
44#define MII_LAN83C185_EDPWRDOWN (1 << 13) /* EDPWRDOWN */
45
46static int smsc_phy_config_intr(struct phy_device *phydev)
47{
48 int rc = phy_write (phydev, MII_LAN83C185_IM,
49 ((PHY_INTERRUPT_ENABLED == phydev->interrupts)
50 ? MII_LAN83C185_ISF_INT_PHYLIB_EVENTS
51 : 0));
52
53 return rc < 0 ? rc : 0;
54}
55
56static int smsc_phy_ack_interrupt(struct phy_device *phydev)
57{
58 int rc = phy_read (phydev, MII_LAN83C185_ISF);
59
60 return rc < 0 ? rc : 0;
61}
62
63static int smsc_phy_config_init(struct phy_device *phydev)
64{
65 int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
66 if (rc < 0)
67 return rc;
68
69 /* Enable energy detect mode for this SMSC Transceivers */
70 rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
71 rc | MII_LAN83C185_EDPWRDOWN);
72 if (rc < 0)
73 return rc;
74
75 return smsc_phy_ack_interrupt (phydev);
76}
77
78static int lan911x_config_init(struct phy_device *phydev)
79{
80 return smsc_phy_ack_interrupt(phydev);
81}
82
83static struct phy_driver lan83c185_driver = {
84 .phy_id = 0x0007c0a0, /* OUI=0x00800f, Model#=0x0a */
85 .phy_id_mask = 0xfffffff0,
86 .name = "SMSC LAN83C185",
87
88 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
89 | SUPPORTED_Asym_Pause),
90 .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
91
92 /* basic functions */
93 .config_aneg = genphy_config_aneg,
94 .read_status = genphy_read_status,
95 .config_init = smsc_phy_config_init,
96
97 /* IRQ related */
98 .ack_interrupt = smsc_phy_ack_interrupt,
99 .config_intr = smsc_phy_config_intr,
100
101 .suspend = genphy_suspend,
102 .resume = genphy_resume,
103
104 .driver = { .owner = THIS_MODULE, }
105};
106
107static struct phy_driver lan8187_driver = {
108 .phy_id = 0x0007c0b0, /* OUI=0x00800f, Model#=0x0b */
109 .phy_id_mask = 0xfffffff0,
110 .name = "SMSC LAN8187",
111
112 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
113 | SUPPORTED_Asym_Pause),
114 .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
115
116 /* basic functions */
117 .config_aneg = genphy_config_aneg,
118 .read_status = genphy_read_status,
119 .config_init = smsc_phy_config_init,
120
121 /* IRQ related */
122 .ack_interrupt = smsc_phy_ack_interrupt,
123 .config_intr = smsc_phy_config_intr,
124
125 .suspend = genphy_suspend,
126 .resume = genphy_resume,
127
128 .driver = { .owner = THIS_MODULE, }
129};
130
131static struct phy_driver lan8700_driver = {
132 .phy_id = 0x0007c0c0, /* OUI=0x00800f, Model#=0x0c */
133 .phy_id_mask = 0xfffffff0,
134 .name = "SMSC LAN8700",
135
136 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
137 | SUPPORTED_Asym_Pause),
138 .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
139
140 /* basic functions */
141 .config_aneg = genphy_config_aneg,
142 .read_status = genphy_read_status,
143 .config_init = smsc_phy_config_init,
144
145 /* IRQ related */
146 .ack_interrupt = smsc_phy_ack_interrupt,
147 .config_intr = smsc_phy_config_intr,
148
149 .suspend = genphy_suspend,
150 .resume = genphy_resume,
151
152 .driver = { .owner = THIS_MODULE, }
153};
154
155static struct phy_driver lan911x_int_driver = {
156 .phy_id = 0x0007c0d0, /* OUI=0x00800f, Model#=0x0d */
157 .phy_id_mask = 0xfffffff0,
158 .name = "SMSC LAN911x Internal PHY",
159
160 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
161 | SUPPORTED_Asym_Pause),
162 .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
163
164 /* basic functions */
165 .config_aneg = genphy_config_aneg,
166 .read_status = genphy_read_status,
167 .config_init = lan911x_config_init,
168
169 /* IRQ related */
170 .ack_interrupt = smsc_phy_ack_interrupt,
171 .config_intr = smsc_phy_config_intr,
172
173 .suspend = genphy_suspend,
174 .resume = genphy_resume,
175
176 .driver = { .owner = THIS_MODULE, }
177};
178
179static struct phy_driver lan8710_driver = {
180 .phy_id = 0x0007c0f0, /* OUI=0x00800f, Model#=0x0f */
181 .phy_id_mask = 0xfffffff0,
182 .name = "SMSC LAN8710/LAN8720",
183
184 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
185 | SUPPORTED_Asym_Pause),
186 .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
187
188 /* basic functions */
189 .config_aneg = genphy_config_aneg,
190 .read_status = genphy_read_status,
191 .config_init = smsc_phy_config_init,
192
193 /* IRQ related */
194 .ack_interrupt = smsc_phy_ack_interrupt,
195 .config_intr = smsc_phy_config_intr,
196
197 .suspend = genphy_suspend,
198 .resume = genphy_resume,
199
200 .driver = { .owner = THIS_MODULE, }
201};
202
203static int __init smsc_init(void)
204{
205 int ret;
206
207 ret = phy_driver_register (&lan83c185_driver);
208 if (ret)
209 goto err1;
210
211 ret = phy_driver_register (&lan8187_driver);
212 if (ret)
213 goto err2;
214
215 ret = phy_driver_register (&lan8700_driver);
216 if (ret)
217 goto err3;
218
219 ret = phy_driver_register (&lan911x_int_driver);
220 if (ret)
221 goto err4;
222
223 ret = phy_driver_register (&lan8710_driver);
224 if (ret)
225 goto err5;
226
227 return 0;
228
229err5:
230 phy_driver_unregister (&lan911x_int_driver);
231err4:
232 phy_driver_unregister (&lan8700_driver);
233err3:
234 phy_driver_unregister (&lan8187_driver);
235err2:
236 phy_driver_unregister (&lan83c185_driver);
237err1:
238 return ret;
239}
240
241static void __exit smsc_exit(void)
242{
243 phy_driver_unregister (&lan8710_driver);
244 phy_driver_unregister (&lan911x_int_driver);
245 phy_driver_unregister (&lan8700_driver);
246 phy_driver_unregister (&lan8187_driver);
247 phy_driver_unregister (&lan83c185_driver);
248}
249
250MODULE_DESCRIPTION("SMSC PHY driver");
251MODULE_AUTHOR("Herbert Valerio Riedel");
252MODULE_LICENSE("GPL");
253
254module_init(smsc_init);
255module_exit(smsc_exit);
256
257static struct mdio_device_id __maybe_unused smsc_tbl[] = {
258 { 0x0007c0a0, 0xfffffff0 },
259 { 0x0007c0b0, 0xfffffff0 },
260 { 0x0007c0c0, 0xfffffff0 },
261 { 0x0007c0d0, 0xfffffff0 },
262 { 0x0007c0f0, 0xfffffff0 },
263 { }
264};
265
266MODULE_DEVICE_TABLE(mdio, smsc_tbl);
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
27struct smsc_phy_priv {
28 bool energy_enable;
29};
30
31static int smsc_phy_config_intr(struct phy_device *phydev)
32{
33 int rc = phy_write (phydev, MII_LAN83C185_IM,
34 ((PHY_INTERRUPT_ENABLED == phydev->interrupts)
35 ? MII_LAN83C185_ISF_INT_PHYLIB_EVENTS
36 : 0));
37
38 return rc < 0 ? rc : 0;
39}
40
41static int smsc_phy_ack_interrupt(struct phy_device *phydev)
42{
43 int rc = phy_read (phydev, MII_LAN83C185_ISF);
44
45 return rc < 0 ? rc : 0;
46}
47
48static int smsc_phy_config_init(struct phy_device *phydev)
49{
50 struct smsc_phy_priv *priv = phydev->priv;
51
52 int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
53
54 if (rc < 0)
55 return rc;
56
57 if (priv->energy_enable) {
58 /* Enable energy detect mode for this SMSC Transceivers */
59 rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
60 rc | MII_LAN83C185_EDPWRDOWN);
61 if (rc < 0)
62 return rc;
63 }
64
65 return smsc_phy_ack_interrupt(phydev);
66}
67
68static int smsc_phy_reset(struct phy_device *phydev)
69{
70 int rc = phy_read(phydev, MII_LAN83C185_SPECIAL_MODES);
71 if (rc < 0)
72 return rc;
73
74 /* If the SMSC PHY is in power down mode, then set it
75 * in all capable mode before using it.
76 */
77 if ((rc & MII_LAN83C185_MODE_MASK) == MII_LAN83C185_MODE_POWERDOWN) {
78 int timeout = 50000;
79
80 /* set "all capable" mode and reset the phy */
81 rc |= MII_LAN83C185_MODE_ALL;
82 phy_write(phydev, MII_LAN83C185_SPECIAL_MODES, rc);
83 phy_write(phydev, MII_BMCR, BMCR_RESET);
84
85 /* wait end of reset (max 500 ms) */
86 do {
87 udelay(10);
88 if (timeout-- == 0)
89 return -1;
90 rc = phy_read(phydev, MII_BMCR);
91 } while (rc & BMCR_RESET);
92 }
93 return 0;
94}
95
96static int lan911x_config_init(struct phy_device *phydev)
97{
98 return smsc_phy_ack_interrupt(phydev);
99}
100
101/*
102 * The LAN87xx suffers from rare absence of the ENERGYON-bit when Ethernet cable
103 * plugs in while LAN87xx is in Energy Detect Power-Down mode. This leads to
104 * unstable detection of plugging in Ethernet cable.
105 * This workaround disables Energy Detect Power-Down mode and waiting for
106 * response on link pulses to detect presence of plugged Ethernet cable.
107 * The Energy Detect Power-Down mode is enabled again in the end of procedure to
108 * save approximately 220 mW of power if cable is unplugged.
109 */
110static int lan87xx_read_status(struct phy_device *phydev)
111{
112 struct smsc_phy_priv *priv = phydev->priv;
113
114 int err = genphy_read_status(phydev);
115
116 if (!phydev->link && priv->energy_enable) {
117 int i;
118
119 /* Disable EDPD to wake up PHY */
120 int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
121 if (rc < 0)
122 return rc;
123
124 rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
125 rc & ~MII_LAN83C185_EDPWRDOWN);
126 if (rc < 0)
127 return rc;
128
129 /* Wait max 640 ms to detect energy */
130 for (i = 0; i < 64; i++) {
131 /* Sleep to allow link test pulses to be sent */
132 msleep(10);
133 rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
134 if (rc < 0)
135 return rc;
136 if (rc & MII_LAN83C185_ENERGYON)
137 break;
138 }
139
140 /* Re-enable EDPD */
141 rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
142 if (rc < 0)
143 return rc;
144
145 rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
146 rc | MII_LAN83C185_EDPWRDOWN);
147 if (rc < 0)
148 return rc;
149 }
150
151 return err;
152}
153
154static int smsc_phy_probe(struct phy_device *phydev)
155{
156 struct device *dev = &phydev->mdio.dev;
157 struct device_node *of_node = dev->of_node;
158 struct smsc_phy_priv *priv;
159
160 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
161 if (!priv)
162 return -ENOMEM;
163
164 priv->energy_enable = true;
165
166 if (of_property_read_bool(of_node, "smsc,disable-energy-detect"))
167 priv->energy_enable = false;
168
169 phydev->priv = priv;
170
171 return 0;
172}
173
174static struct phy_driver smsc_phy_driver[] = {
175{
176 .phy_id = 0x0007c0a0, /* OUI=0x00800f, Model#=0x0a */
177 .phy_id_mask = 0xfffffff0,
178 .name = "SMSC LAN83C185",
179
180 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
181 | SUPPORTED_Asym_Pause),
182 .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
183
184 .probe = smsc_phy_probe,
185
186 /* basic functions */
187 .config_aneg = genphy_config_aneg,
188 .read_status = genphy_read_status,
189 .config_init = smsc_phy_config_init,
190 .soft_reset = smsc_phy_reset,
191
192 /* IRQ related */
193 .ack_interrupt = smsc_phy_ack_interrupt,
194 .config_intr = smsc_phy_config_intr,
195
196 .suspend = genphy_suspend,
197 .resume = genphy_resume,
198}, {
199 .phy_id = 0x0007c0b0, /* OUI=0x00800f, Model#=0x0b */
200 .phy_id_mask = 0xfffffff0,
201 .name = "SMSC LAN8187",
202
203 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
204 | SUPPORTED_Asym_Pause),
205 .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
206
207 .probe = smsc_phy_probe,
208
209 /* basic functions */
210 .config_aneg = genphy_config_aneg,
211 .read_status = genphy_read_status,
212 .config_init = smsc_phy_config_init,
213 .soft_reset = smsc_phy_reset,
214
215 /* IRQ related */
216 .ack_interrupt = smsc_phy_ack_interrupt,
217 .config_intr = smsc_phy_config_intr,
218
219 .suspend = genphy_suspend,
220 .resume = genphy_resume,
221}, {
222 .phy_id = 0x0007c0c0, /* OUI=0x00800f, Model#=0x0c */
223 .phy_id_mask = 0xfffffff0,
224 .name = "SMSC LAN8700",
225
226 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
227 | SUPPORTED_Asym_Pause),
228 .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
229
230 .probe = smsc_phy_probe,
231
232 /* basic functions */
233 .config_aneg = genphy_config_aneg,
234 .read_status = lan87xx_read_status,
235 .config_init = smsc_phy_config_init,
236 .soft_reset = smsc_phy_reset,
237
238 /* IRQ related */
239 .ack_interrupt = smsc_phy_ack_interrupt,
240 .config_intr = smsc_phy_config_intr,
241
242 .suspend = genphy_suspend,
243 .resume = genphy_resume,
244}, {
245 .phy_id = 0x0007c0d0, /* OUI=0x00800f, Model#=0x0d */
246 .phy_id_mask = 0xfffffff0,
247 .name = "SMSC LAN911x Internal PHY",
248
249 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
250 | SUPPORTED_Asym_Pause),
251 .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
252
253 .probe = smsc_phy_probe,
254
255 /* basic functions */
256 .config_aneg = genphy_config_aneg,
257 .read_status = genphy_read_status,
258 .config_init = lan911x_config_init,
259
260 /* IRQ related */
261 .ack_interrupt = smsc_phy_ack_interrupt,
262 .config_intr = smsc_phy_config_intr,
263
264 .suspend = genphy_suspend,
265 .resume = genphy_resume,
266}, {
267 .phy_id = 0x0007c0f0, /* OUI=0x00800f, Model#=0x0f */
268 .phy_id_mask = 0xfffffff0,
269 .name = "SMSC LAN8710/LAN8720",
270
271 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
272 | SUPPORTED_Asym_Pause),
273 .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
274
275 .probe = smsc_phy_probe,
276
277 /* basic functions */
278 .config_aneg = genphy_config_aneg,
279 .read_status = lan87xx_read_status,
280 .config_init = smsc_phy_config_init,
281 .soft_reset = smsc_phy_reset,
282
283 /* IRQ related */
284 .ack_interrupt = smsc_phy_ack_interrupt,
285 .config_intr = smsc_phy_config_intr,
286
287 .suspend = genphy_suspend,
288 .resume = genphy_resume,
289}, {
290 .phy_id = 0x0007c110,
291 .phy_id_mask = 0xfffffff0,
292 .name = "SMSC LAN8740",
293
294 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
295 | SUPPORTED_Asym_Pause),
296 .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
297
298 .probe = smsc_phy_probe,
299
300 /* basic functions */
301 .config_aneg = genphy_config_aneg,
302 .read_status = lan87xx_read_status,
303 .config_init = smsc_phy_config_init,
304 .soft_reset = smsc_phy_reset,
305
306 /* IRQ related */
307 .ack_interrupt = smsc_phy_ack_interrupt,
308 .config_intr = smsc_phy_config_intr,
309
310 .suspend = genphy_suspend,
311 .resume = genphy_resume,
312} };
313
314module_phy_driver(smsc_phy_driver);
315
316MODULE_DESCRIPTION("SMSC PHY driver");
317MODULE_AUTHOR("Herbert Valerio Riedel");
318MODULE_LICENSE("GPL");
319
320static struct mdio_device_id __maybe_unused smsc_tbl[] = {
321 { 0x0007c0a0, 0xfffffff0 },
322 { 0x0007c0b0, 0xfffffff0 },
323 { 0x0007c0c0, 0xfffffff0 },
324 { 0x0007c0d0, 0xfffffff0 },
325 { 0x0007c0f0, 0xfffffff0 },
326 { 0x0007c110, 0xfffffff0 },
327 { }
328};
329
330MODULE_DEVICE_TABLE(mdio, smsc_tbl);