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c9e055ac HVR |
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 | * | |
90b24cfb | 15 | * Support added for SMSC LAN8187 and LAN8700 by steve.glendinning@shawell.net |
4d9b1a02 | 16 | * |
c9e055ac HVR |
17 | */ |
18 | ||
c9e055ac HVR |
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> | |
43c6759e | 25 | #include <linux/smscphy.h> |
c9e055ac | 26 | |
0a9c453e TR |
27 | struct smsc_phy_priv { |
28 | bool energy_enable; | |
29 | }; | |
30 | ||
48c41b99 | 31 | static int smsc_phy_config_intr(struct phy_device *phydev) |
c9e055ac HVR |
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 | ||
48c41b99 | 41 | static int smsc_phy_ack_interrupt(struct phy_device *phydev) |
c9e055ac HVR |
42 | { |
43 | int rc = phy_read (phydev, MII_LAN83C185_ISF); | |
44 | ||
45 | return rc < 0 ? rc : 0; | |
46 | } | |
47 | ||
48c41b99 | 48 | static int smsc_phy_config_init(struct phy_device *phydev) |
21009686 | 49 | { |
0a9c453e TR |
50 | struct smsc_phy_priv *priv = phydev->priv; |
51 | ||
21009686 GGM |
52 | int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS); |
53 | ||
54 | if (rc < 0) | |
55 | return rc; | |
56 | ||
0a9c453e | 57 | if (priv->energy_enable) { |
d88ecb37 HS |
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 | } | |
21009686 GGM |
64 | |
65 | return smsc_phy_ack_interrupt(phydev); | |
66 | } | |
67 | ||
68 | static int smsc_phy_reset(struct phy_device *phydev) | |
c9e055ac | 69 | { |
6ded7cd6 | 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) { | |
fc0f7e33 | 78 | /* set "all capable" mode */ |
6ded7cd6 | 79 | rc |= MII_LAN83C185_MODE_ALL; |
80 | phy_write(phydev, MII_LAN83C185_SPECIAL_MODES, rc); | |
6ded7cd6 | 81 | } |
fc0f7e33 MS |
82 | |
83 | /* reset the phy */ | |
84 | return genphy_soft_reset(phydev); | |
c9e055ac HVR |
85 | } |
86 | ||
4223dbff | 87 | static int lan911x_config_init(struct phy_device *phydev) |
b629820d | 88 | { |
b629820d MV |
89 | return smsc_phy_ack_interrupt(phydev); |
90 | } | |
91 | ||
4223dbff | 92 | /* |
776829de IP |
93 | * The LAN87xx suffers from rare absence of the ENERGYON-bit when Ethernet cable |
94 | * plugs in while LAN87xx is in Energy Detect Power-Down mode. This leads to | |
95 | * unstable detection of plugging in Ethernet cable. | |
96 | * This workaround disables Energy Detect Power-Down mode and waiting for | |
97 | * response on link pulses to detect presence of plugged Ethernet cable. | |
98 | * The Energy Detect Power-Down mode is enabled again in the end of procedure to | |
99 | * save approximately 220 mW of power if cable is unplugged. | |
4223dbff PT |
100 | */ |
101 | static int lan87xx_read_status(struct phy_device *phydev) | |
698244ac | 102 | { |
0a9c453e TR |
103 | struct smsc_phy_priv *priv = phydev->priv; |
104 | ||
4223dbff PT |
105 | int err = genphy_read_status(phydev); |
106 | ||
0a9c453e TR |
107 | if (!phydev->link && priv->energy_enable) { |
108 | int i; | |
109 | ||
4223dbff PT |
110 | /* Disable EDPD to wake up PHY */ |
111 | int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS); | |
112 | if (rc < 0) | |
113 | return rc; | |
114 | ||
115 | rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS, | |
116 | rc & ~MII_LAN83C185_EDPWRDOWN); | |
117 | if (rc < 0) | |
118 | return rc; | |
119 | ||
776829de IP |
120 | /* Wait max 640 ms to detect energy */ |
121 | for (i = 0; i < 64; i++) { | |
122 | /* Sleep to allow link test pulses to be sent */ | |
123 | msleep(10); | |
124 | rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS); | |
125 | if (rc < 0) | |
126 | return rc; | |
127 | if (rc & MII_LAN83C185_ENERGYON) | |
128 | break; | |
ff94c742 | 129 | } |
4223dbff PT |
130 | |
131 | /* Re-enable EDPD */ | |
132 | rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS); | |
133 | if (rc < 0) | |
134 | return rc; | |
135 | ||
136 | rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS, | |
137 | rc | MII_LAN83C185_EDPWRDOWN); | |
138 | if (rc < 0) | |
139 | return rc; | |
140 | } | |
141 | ||
142 | return err; | |
698244ac | 143 | } |
c9e055ac | 144 | |
0a9c453e TR |
145 | static int smsc_phy_probe(struct phy_device *phydev) |
146 | { | |
147 | struct device *dev = &phydev->mdio.dev; | |
148 | struct device_node *of_node = dev->of_node; | |
149 | struct smsc_phy_priv *priv; | |
150 | ||
151 | priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); | |
152 | if (!priv) | |
153 | return -ENOMEM; | |
154 | ||
155 | priv->energy_enable = true; | |
156 | ||
157 | if (of_property_read_bool(of_node, "smsc,disable-energy-detect")) | |
158 | priv->energy_enable = false; | |
159 | ||
160 | phydev->priv = priv; | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
d5bf9071 CH |
165 | static struct phy_driver smsc_phy_driver[] = { |
166 | { | |
c9e055ac HVR |
167 | .phy_id = 0x0007c0a0, /* OUI=0x00800f, Model#=0x0a */ |
168 | .phy_id_mask = 0xfffffff0, | |
169 | .name = "SMSC LAN83C185", | |
170 | ||
171 | .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause | |
172 | | SUPPORTED_Asym_Pause), | |
173 | .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG, | |
174 | ||
0a9c453e TR |
175 | .probe = smsc_phy_probe, |
176 | ||
c9e055ac HVR |
177 | /* basic functions */ |
178 | .config_aneg = genphy_config_aneg, | |
179 | .read_status = genphy_read_status, | |
48c41b99 | 180 | .config_init = smsc_phy_config_init, |
21009686 | 181 | .soft_reset = smsc_phy_reset, |
c9e055ac HVR |
182 | |
183 | /* IRQ related */ | |
48c41b99 SG |
184 | .ack_interrupt = smsc_phy_ack_interrupt, |
185 | .config_intr = smsc_phy_config_intr, | |
c9e055ac | 186 | |
c64d2a9a SG |
187 | .suspend = genphy_suspend, |
188 | .resume = genphy_resume, | |
d5bf9071 | 189 | }, { |
4d9b1a02 SG |
190 | .phy_id = 0x0007c0b0, /* OUI=0x00800f, Model#=0x0b */ |
191 | .phy_id_mask = 0xfffffff0, | |
192 | .name = "SMSC LAN8187", | |
193 | ||
194 | .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause | |
195 | | SUPPORTED_Asym_Pause), | |
196 | .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG, | |
197 | ||
0a9c453e TR |
198 | .probe = smsc_phy_probe, |
199 | ||
4d9b1a02 SG |
200 | /* basic functions */ |
201 | .config_aneg = genphy_config_aneg, | |
202 | .read_status = genphy_read_status, | |
203 | .config_init = smsc_phy_config_init, | |
21009686 | 204 | .soft_reset = smsc_phy_reset, |
4d9b1a02 SG |
205 | |
206 | /* IRQ related */ | |
207 | .ack_interrupt = smsc_phy_ack_interrupt, | |
208 | .config_intr = smsc_phy_config_intr, | |
209 | ||
c64d2a9a SG |
210 | .suspend = genphy_suspend, |
211 | .resume = genphy_resume, | |
d5bf9071 | 212 | }, { |
4d9b1a02 SG |
213 | .phy_id = 0x0007c0c0, /* OUI=0x00800f, Model#=0x0c */ |
214 | .phy_id_mask = 0xfffffff0, | |
215 | .name = "SMSC LAN8700", | |
216 | ||
217 | .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause | |
218 | | SUPPORTED_Asym_Pause), | |
219 | .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG, | |
220 | ||
0a9c453e TR |
221 | .probe = smsc_phy_probe, |
222 | ||
4d9b1a02 SG |
223 | /* basic functions */ |
224 | .config_aneg = genphy_config_aneg, | |
776829de | 225 | .read_status = lan87xx_read_status, |
4d9b1a02 | 226 | .config_init = smsc_phy_config_init, |
21009686 | 227 | .soft_reset = smsc_phy_reset, |
4d9b1a02 SG |
228 | |
229 | /* IRQ related */ | |
230 | .ack_interrupt = smsc_phy_ack_interrupt, | |
231 | .config_intr = smsc_phy_config_intr, | |
232 | ||
c64d2a9a SG |
233 | .suspend = genphy_suspend, |
234 | .resume = genphy_resume, | |
d5bf9071 | 235 | }, { |
fd9abb3d SG |
236 | .phy_id = 0x0007c0d0, /* OUI=0x00800f, Model#=0x0d */ |
237 | .phy_id_mask = 0xfffffff0, | |
238 | .name = "SMSC LAN911x Internal PHY", | |
239 | ||
240 | .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause | |
241 | | SUPPORTED_Asym_Pause), | |
242 | .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG, | |
243 | ||
0a9c453e TR |
244 | .probe = smsc_phy_probe, |
245 | ||
fd9abb3d SG |
246 | /* basic functions */ |
247 | .config_aneg = genphy_config_aneg, | |
248 | .read_status = genphy_read_status, | |
698244ac | 249 | .config_init = lan911x_config_init, |
fd9abb3d SG |
250 | |
251 | /* IRQ related */ | |
252 | .ack_interrupt = smsc_phy_ack_interrupt, | |
253 | .config_intr = smsc_phy_config_intr, | |
254 | ||
c64d2a9a SG |
255 | .suspend = genphy_suspend, |
256 | .resume = genphy_resume, | |
d5bf9071 | 257 | }, { |
e072b639 SG |
258 | .phy_id = 0x0007c0f0, /* OUI=0x00800f, Model#=0x0f */ |
259 | .phy_id_mask = 0xfffffff0, | |
260 | .name = "SMSC LAN8710/LAN8720", | |
261 | ||
262 | .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause | |
263 | | SUPPORTED_Asym_Pause), | |
264 | .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG, | |
265 | ||
0a9c453e TR |
266 | .probe = smsc_phy_probe, |
267 | ||
e072b639 SG |
268 | /* basic functions */ |
269 | .config_aneg = genphy_config_aneg, | |
4223dbff | 270 | .read_status = lan87xx_read_status, |
4257d583 | 271 | .config_init = smsc_phy_config_init, |
21009686 | 272 | .soft_reset = smsc_phy_reset, |
e072b639 SG |
273 | |
274 | /* IRQ related */ | |
275 | .ack_interrupt = smsc_phy_ack_interrupt, | |
276 | .config_intr = smsc_phy_config_intr, | |
277 | ||
26706d43 JH |
278 | .suspend = genphy_suspend, |
279 | .resume = genphy_resume, | |
280 | }, { | |
281 | .phy_id = 0x0007c110, | |
282 | .phy_id_mask = 0xfffffff0, | |
283 | .name = "SMSC LAN8740", | |
284 | ||
285 | .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause | |
286 | | SUPPORTED_Asym_Pause), | |
287 | .flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG, | |
288 | ||
0a9c453e TR |
289 | .probe = smsc_phy_probe, |
290 | ||
26706d43 JH |
291 | /* basic functions */ |
292 | .config_aneg = genphy_config_aneg, | |
293 | .read_status = lan87xx_read_status, | |
294 | .config_init = smsc_phy_config_init, | |
295 | .soft_reset = smsc_phy_reset, | |
296 | ||
297 | /* IRQ related */ | |
298 | .ack_interrupt = smsc_phy_ack_interrupt, | |
299 | .config_intr = smsc_phy_config_intr, | |
300 | ||
e072b639 SG |
301 | .suspend = genphy_suspend, |
302 | .resume = genphy_resume, | |
d5bf9071 | 303 | } }; |
e072b639 | 304 | |
50fd7150 | 305 | module_phy_driver(smsc_phy_driver); |
c9e055ac HVR |
306 | |
307 | MODULE_DESCRIPTION("SMSC PHY driver"); | |
308 | MODULE_AUTHOR("Herbert Valerio Riedel"); | |
309 | MODULE_LICENSE("GPL"); | |
310 | ||
cf93c945 | 311 | static struct mdio_device_id __maybe_unused smsc_tbl[] = { |
4e4f10f6 DW |
312 | { 0x0007c0a0, 0xfffffff0 }, |
313 | { 0x0007c0b0, 0xfffffff0 }, | |
314 | { 0x0007c0c0, 0xfffffff0 }, | |
315 | { 0x0007c0d0, 0xfffffff0 }, | |
316 | { 0x0007c0f0, 0xfffffff0 }, | |
26706d43 | 317 | { 0x0007c110, 0xfffffff0 }, |
4e4f10f6 DW |
318 | { } |
319 | }; | |
320 | ||
321 | MODULE_DEVICE_TABLE(mdio, smsc_tbl); |