2 * drivers/net/phy/smsc.c
6 * Author: Herbert Valerio Riedel
8 * Copyright (c) 2006 Herbert Valerio Riedel <hvr@gnu.org>
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.
15 * Support added for SMSC LAN8187 and LAN8700 by steve.glendinning@shawell.net
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/mii.h>
22 #include <linux/ethtool.h>
24 #include <linux/phy.h>
25 #include <linux/netdevice.h>
26 #include <linux/smscphy.h>
34 static struct smsc_hw_stat smsc_hw_stats[] = {
35 { "phy_symbol_errors", 26, 16},
38 struct smsc_phy_priv {
42 static int smsc_phy_config_intr(struct phy_device *phydev)
44 int rc = phy_write (phydev, MII_LAN83C185_IM,
45 ((PHY_INTERRUPT_ENABLED == phydev->interrupts)
46 ? MII_LAN83C185_ISF_INT_PHYLIB_EVENTS
49 return rc < 0 ? rc : 0;
52 static int smsc_phy_ack_interrupt(struct phy_device *phydev)
54 int rc = phy_read (phydev, MII_LAN83C185_ISF);
56 return rc < 0 ? rc : 0;
59 static int smsc_phy_config_init(struct phy_device *phydev)
61 struct smsc_phy_priv *priv = phydev->priv;
63 int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
68 if (priv->energy_enable) {
69 /* Enable energy detect mode for this SMSC Transceivers */
70 rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
71 rc | MII_LAN83C185_EDPWRDOWN);
76 return smsc_phy_ack_interrupt(phydev);
79 static int smsc_phy_reset(struct phy_device *phydev)
81 int rc = phy_read(phydev, MII_LAN83C185_SPECIAL_MODES);
85 /* If the SMSC PHY is in power down mode, then set it
86 * in all capable mode before using it.
88 if ((rc & MII_LAN83C185_MODE_MASK) == MII_LAN83C185_MODE_POWERDOWN) {
89 /* set "all capable" mode */
90 rc |= MII_LAN83C185_MODE_ALL;
91 phy_write(phydev, MII_LAN83C185_SPECIAL_MODES, rc);
95 return genphy_soft_reset(phydev);
98 static int lan911x_config_init(struct phy_device *phydev)
100 return smsc_phy_ack_interrupt(phydev);
104 * The LAN87xx suffers from rare absence of the ENERGYON-bit when Ethernet cable
105 * plugs in while LAN87xx is in Energy Detect Power-Down mode. This leads to
106 * unstable detection of plugging in Ethernet cable.
107 * This workaround disables Energy Detect Power-Down mode and waiting for
108 * response on link pulses to detect presence of plugged Ethernet cable.
109 * The Energy Detect Power-Down mode is enabled again in the end of procedure to
110 * save approximately 220 mW of power if cable is unplugged.
112 static int lan87xx_read_status(struct phy_device *phydev)
114 struct smsc_phy_priv *priv = phydev->priv;
117 err = genphy_read_status(phydev);
121 if (!phydev->link && priv->energy_enable) {
124 /* Disable EDPD to wake up PHY */
125 int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
129 rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
130 rc & ~MII_LAN83C185_EDPWRDOWN);
134 /* Wait max 640 ms to detect energy */
135 for (i = 0; i < 64; i++) {
136 /* Sleep to allow link test pulses to be sent */
138 rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
141 if (rc & MII_LAN83C185_ENERGYON)
146 rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
150 rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
151 rc | MII_LAN83C185_EDPWRDOWN);
159 static int smsc_get_sset_count(struct phy_device *phydev)
161 return ARRAY_SIZE(smsc_hw_stats);
164 static void smsc_get_strings(struct phy_device *phydev, u8 *data)
168 for (i = 0; i < ARRAY_SIZE(smsc_hw_stats); i++) {
169 strncpy(data + i * ETH_GSTRING_LEN,
170 smsc_hw_stats[i].string, ETH_GSTRING_LEN);
175 #define UINT64_MAX (u64)(~((u64)0))
177 static u64 smsc_get_stat(struct phy_device *phydev, int i)
179 struct smsc_hw_stat stat = smsc_hw_stats[i];
183 val = phy_read(phydev, stat.reg);
192 static void smsc_get_stats(struct phy_device *phydev,
193 struct ethtool_stats *stats, u64 *data)
197 for (i = 0; i < ARRAY_SIZE(smsc_hw_stats); i++)
198 data[i] = smsc_get_stat(phydev, i);
201 static int smsc_phy_probe(struct phy_device *phydev)
203 struct device *dev = &phydev->mdio.dev;
204 struct device_node *of_node = dev->of_node;
205 struct smsc_phy_priv *priv;
207 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
211 priv->energy_enable = true;
213 if (of_property_read_bool(of_node, "smsc,disable-energy-detect"))
214 priv->energy_enable = false;
221 static struct phy_driver smsc_phy_driver[] = {
223 .phy_id = 0x0007c0a0, /* OUI=0x00800f, Model#=0x0a */
224 .phy_id_mask = 0xfffffff0,
225 .name = "SMSC LAN83C185",
227 .features = PHY_BASIC_FEATURES,
228 .flags = PHY_HAS_INTERRUPT,
230 .probe = smsc_phy_probe,
232 /* basic functions */
233 .config_aneg = genphy_config_aneg,
234 .read_status = genphy_read_status,
235 .config_init = smsc_phy_config_init,
236 .soft_reset = smsc_phy_reset,
239 .ack_interrupt = smsc_phy_ack_interrupt,
240 .config_intr = smsc_phy_config_intr,
242 .suspend = genphy_suspend,
243 .resume = genphy_resume,
245 .phy_id = 0x0007c0b0, /* OUI=0x00800f, Model#=0x0b */
246 .phy_id_mask = 0xfffffff0,
247 .name = "SMSC LAN8187",
249 .features = PHY_BASIC_FEATURES,
250 .flags = PHY_HAS_INTERRUPT,
252 .probe = smsc_phy_probe,
254 /* basic functions */
255 .config_aneg = genphy_config_aneg,
256 .read_status = genphy_read_status,
257 .config_init = smsc_phy_config_init,
258 .soft_reset = smsc_phy_reset,
261 .ack_interrupt = smsc_phy_ack_interrupt,
262 .config_intr = smsc_phy_config_intr,
265 .get_sset_count = smsc_get_sset_count,
266 .get_strings = smsc_get_strings,
267 .get_stats = smsc_get_stats,
269 .suspend = genphy_suspend,
270 .resume = genphy_resume,
272 .phy_id = 0x0007c0c0, /* OUI=0x00800f, Model#=0x0c */
273 .phy_id_mask = 0xfffffff0,
274 .name = "SMSC LAN8700",
276 .features = PHY_BASIC_FEATURES,
277 .flags = PHY_HAS_INTERRUPT,
279 .probe = smsc_phy_probe,
281 /* basic functions */
282 .config_aneg = genphy_config_aneg,
283 .read_status = lan87xx_read_status,
284 .config_init = smsc_phy_config_init,
285 .soft_reset = smsc_phy_reset,
288 .ack_interrupt = smsc_phy_ack_interrupt,
289 .config_intr = smsc_phy_config_intr,
292 .get_sset_count = smsc_get_sset_count,
293 .get_strings = smsc_get_strings,
294 .get_stats = smsc_get_stats,
296 .suspend = genphy_suspend,
297 .resume = genphy_resume,
299 .phy_id = 0x0007c0d0, /* OUI=0x00800f, Model#=0x0d */
300 .phy_id_mask = 0xfffffff0,
301 .name = "SMSC LAN911x Internal PHY",
303 .features = PHY_BASIC_FEATURES,
304 .flags = PHY_HAS_INTERRUPT,
306 .probe = smsc_phy_probe,
308 /* basic functions */
309 .config_aneg = genphy_config_aneg,
310 .read_status = genphy_read_status,
311 .config_init = lan911x_config_init,
314 .ack_interrupt = smsc_phy_ack_interrupt,
315 .config_intr = smsc_phy_config_intr,
317 .suspend = genphy_suspend,
318 .resume = genphy_resume,
320 .phy_id = 0x0007c0f0, /* OUI=0x00800f, Model#=0x0f */
321 .phy_id_mask = 0xfffffff0,
322 .name = "SMSC LAN8710/LAN8720",
324 .features = PHY_BASIC_FEATURES,
325 .flags = PHY_HAS_INTERRUPT,
327 .probe = smsc_phy_probe,
329 /* basic functions */
330 .config_aneg = genphy_config_aneg,
331 .read_status = lan87xx_read_status,
332 .config_init = smsc_phy_config_init,
333 .soft_reset = smsc_phy_reset,
336 .ack_interrupt = smsc_phy_ack_interrupt,
337 .config_intr = smsc_phy_config_intr,
340 .get_sset_count = smsc_get_sset_count,
341 .get_strings = smsc_get_strings,
342 .get_stats = smsc_get_stats,
344 .suspend = genphy_suspend,
345 .resume = genphy_resume,
347 .phy_id = 0x0007c110,
348 .phy_id_mask = 0xfffffff0,
349 .name = "SMSC LAN8740",
351 .features = PHY_BASIC_FEATURES,
352 .flags = PHY_HAS_INTERRUPT,
354 .probe = smsc_phy_probe,
356 /* basic functions */
357 .config_aneg = genphy_config_aneg,
358 .read_status = lan87xx_read_status,
359 .config_init = smsc_phy_config_init,
360 .soft_reset = smsc_phy_reset,
363 .ack_interrupt = smsc_phy_ack_interrupt,
364 .config_intr = smsc_phy_config_intr,
367 .get_sset_count = smsc_get_sset_count,
368 .get_strings = smsc_get_strings,
369 .get_stats = smsc_get_stats,
371 .suspend = genphy_suspend,
372 .resume = genphy_resume,
375 module_phy_driver(smsc_phy_driver);
377 MODULE_DESCRIPTION("SMSC PHY driver");
378 MODULE_AUTHOR("Herbert Valerio Riedel");
379 MODULE_LICENSE("GPL");
381 static struct mdio_device_id __maybe_unused smsc_tbl[] = {
382 { 0x0007c0a0, 0xfffffff0 },
383 { 0x0007c0b0, 0xfffffff0 },
384 { 0x0007c0c0, 0xfffffff0 },
385 { 0x0007c0d0, 0xfffffff0 },
386 { 0x0007c0f0, 0xfffffff0 },
387 { 0x0007c110, 0xfffffff0 },
391 MODULE_DEVICE_TABLE(mdio, smsc_tbl);