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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) { | |
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 | } | |
21009686 | 93 | return 0; |
c9e055ac HVR |
94 | } |
95 | ||
4223dbff | 96 | static int lan911x_config_init(struct phy_device *phydev) |
b629820d | 97 | { |
b629820d MV |
98 | return smsc_phy_ack_interrupt(phydev); |
99 | } | |
100 | ||
4223dbff | 101 | /* |
776829de IP |
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. | |
4223dbff PT |
109 | */ |
110 | static int lan87xx_read_status(struct phy_device *phydev) | |
698244ac | 111 | { |
0a9c453e TR |
112 | struct smsc_phy_priv *priv = phydev->priv; |
113 | ||
4223dbff PT |
114 | int err = genphy_read_status(phydev); |
115 | ||
0a9c453e TR |
116 | if (!phydev->link && priv->energy_enable) { |
117 | int i; | |
118 | ||
4223dbff PT |
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 | ||
776829de IP |
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; | |
ff94c742 | 138 | } |
4223dbff PT |
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; | |
698244ac | 152 | } |
c9e055ac | 153 | |
0a9c453e TR |
154 | static 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 | ||
d5bf9071 CH |
174 | static struct phy_driver smsc_phy_driver[] = { |
175 | { | |
c9e055ac HVR |
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 | ||
0a9c453e TR |
184 | .probe = smsc_phy_probe, |
185 | ||
c9e055ac HVR |
186 | /* basic functions */ |
187 | .config_aneg = genphy_config_aneg, | |
188 | .read_status = genphy_read_status, | |
48c41b99 | 189 | .config_init = smsc_phy_config_init, |
21009686 | 190 | .soft_reset = smsc_phy_reset, |
c9e055ac HVR |
191 | |
192 | /* IRQ related */ | |
48c41b99 SG |
193 | .ack_interrupt = smsc_phy_ack_interrupt, |
194 | .config_intr = smsc_phy_config_intr, | |
c9e055ac | 195 | |
c64d2a9a SG |
196 | .suspend = genphy_suspend, |
197 | .resume = genphy_resume, | |
d5bf9071 | 198 | }, { |
4d9b1a02 SG |
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 | ||
0a9c453e TR |
207 | .probe = smsc_phy_probe, |
208 | ||
4d9b1a02 SG |
209 | /* basic functions */ |
210 | .config_aneg = genphy_config_aneg, | |
211 | .read_status = genphy_read_status, | |
212 | .config_init = smsc_phy_config_init, | |
21009686 | 213 | .soft_reset = smsc_phy_reset, |
4d9b1a02 SG |
214 | |
215 | /* IRQ related */ | |
216 | .ack_interrupt = smsc_phy_ack_interrupt, | |
217 | .config_intr = smsc_phy_config_intr, | |
218 | ||
c64d2a9a SG |
219 | .suspend = genphy_suspend, |
220 | .resume = genphy_resume, | |
d5bf9071 | 221 | }, { |
4d9b1a02 SG |
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 | ||
0a9c453e TR |
230 | .probe = smsc_phy_probe, |
231 | ||
4d9b1a02 SG |
232 | /* basic functions */ |
233 | .config_aneg = genphy_config_aneg, | |
776829de | 234 | .read_status = lan87xx_read_status, |
4d9b1a02 | 235 | .config_init = smsc_phy_config_init, |
21009686 | 236 | .soft_reset = smsc_phy_reset, |
4d9b1a02 SG |
237 | |
238 | /* IRQ related */ | |
239 | .ack_interrupt = smsc_phy_ack_interrupt, | |
240 | .config_intr = smsc_phy_config_intr, | |
241 | ||
c64d2a9a SG |
242 | .suspend = genphy_suspend, |
243 | .resume = genphy_resume, | |
d5bf9071 | 244 | }, { |
fd9abb3d SG |
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 | ||
0a9c453e TR |
253 | .probe = smsc_phy_probe, |
254 | ||
fd9abb3d SG |
255 | /* basic functions */ |
256 | .config_aneg = genphy_config_aneg, | |
257 | .read_status = genphy_read_status, | |
698244ac | 258 | .config_init = lan911x_config_init, |
fd9abb3d SG |
259 | |
260 | /* IRQ related */ | |
261 | .ack_interrupt = smsc_phy_ack_interrupt, | |
262 | .config_intr = smsc_phy_config_intr, | |
263 | ||
c64d2a9a SG |
264 | .suspend = genphy_suspend, |
265 | .resume = genphy_resume, | |
d5bf9071 | 266 | }, { |
e072b639 SG |
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 | ||
0a9c453e TR |
275 | .probe = smsc_phy_probe, |
276 | ||
e072b639 SG |
277 | /* basic functions */ |
278 | .config_aneg = genphy_config_aneg, | |
4223dbff | 279 | .read_status = lan87xx_read_status, |
4257d583 | 280 | .config_init = smsc_phy_config_init, |
21009686 | 281 | .soft_reset = smsc_phy_reset, |
e072b639 SG |
282 | |
283 | /* IRQ related */ | |
284 | .ack_interrupt = smsc_phy_ack_interrupt, | |
285 | .config_intr = smsc_phy_config_intr, | |
286 | ||
26706d43 JH |
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 | ||
0a9c453e TR |
298 | .probe = smsc_phy_probe, |
299 | ||
26706d43 JH |
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 | ||
e072b639 SG |
310 | .suspend = genphy_suspend, |
311 | .resume = genphy_resume, | |
d5bf9071 | 312 | } }; |
e072b639 | 313 | |
50fd7150 | 314 | module_phy_driver(smsc_phy_driver); |
c9e055ac HVR |
315 | |
316 | MODULE_DESCRIPTION("SMSC PHY driver"); | |
317 | MODULE_AUTHOR("Herbert Valerio Riedel"); | |
318 | MODULE_LICENSE("GPL"); | |
319 | ||
cf93c945 | 320 | static struct mdio_device_id __maybe_unused smsc_tbl[] = { |
4e4f10f6 DW |
321 | { 0x0007c0a0, 0xfffffff0 }, |
322 | { 0x0007c0b0, 0xfffffff0 }, | |
323 | { 0x0007c0c0, 0xfffffff0 }, | |
324 | { 0x0007c0d0, 0xfffffff0 }, | |
325 | { 0x0007c0f0, 0xfffffff0 }, | |
26706d43 | 326 | { 0x0007c110, 0xfffffff0 }, |
4e4f10f6 DW |
327 | { } |
328 | }; | |
329 | ||
330 | MODULE_DEVICE_TABLE(mdio, smsc_tbl); |