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v3.1
  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);
v4.10.11
  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		/* set "all capable" mode */
 79		rc |= MII_LAN83C185_MODE_ALL;
 80		phy_write(phydev, MII_LAN83C185_SPECIAL_MODES, rc);
 81	}
 82
 83	/* reset the phy */
 84	return genphy_soft_reset(phydev);
 85}
 86
 87static int lan911x_config_init(struct phy_device *phydev)
 88{
 89	return smsc_phy_ack_interrupt(phydev);
 90}
 91
 92/*
 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.
100 */
101static int lan87xx_read_status(struct phy_device *phydev)
102{
103	struct smsc_phy_priv *priv = phydev->priv;
104
105	int err = genphy_read_status(phydev);
106
107	if (!phydev->link && priv->energy_enable) {
108		int i;
109
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
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;
129		}
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;
143}
144
145static 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
165static struct phy_driver smsc_phy_driver[] = {
166{
167	.phy_id		= 0x0007c0a0, /* OUI=0x00800f, Model#=0x0a */
168	.phy_id_mask	= 0xfffffff0,
169	.name		= "SMSC LAN83C185",
170
171	.features	= PHY_BASIC_FEATURES,
 
172	.flags		= PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
173
174	.probe		= smsc_phy_probe,
175
176	/* basic functions */
177	.config_aneg	= genphy_config_aneg,
178	.read_status	= genphy_read_status,
179	.config_init	= smsc_phy_config_init,
180	.soft_reset	= smsc_phy_reset,
181
182	/* IRQ related */
183	.ack_interrupt	= smsc_phy_ack_interrupt,
184	.config_intr	= smsc_phy_config_intr,
185
186	.suspend	= genphy_suspend,
187	.resume		= genphy_resume,
188}, {
 
 
 
 
189	.phy_id		= 0x0007c0b0, /* OUI=0x00800f, Model#=0x0b */
190	.phy_id_mask	= 0xfffffff0,
191	.name		= "SMSC LAN8187",
192
193	.features	= PHY_BASIC_FEATURES,
 
194	.flags		= PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
195
196	.probe		= smsc_phy_probe,
197
198	/* basic functions */
199	.config_aneg	= genphy_config_aneg,
200	.read_status	= genphy_read_status,
201	.config_init	= smsc_phy_config_init,
202	.soft_reset	= smsc_phy_reset,
203
204	/* IRQ related */
205	.ack_interrupt	= smsc_phy_ack_interrupt,
206	.config_intr	= smsc_phy_config_intr,
207
208	.suspend	= genphy_suspend,
209	.resume		= genphy_resume,
210}, {
 
 
 
 
211	.phy_id		= 0x0007c0c0, /* OUI=0x00800f, Model#=0x0c */
212	.phy_id_mask	= 0xfffffff0,
213	.name		= "SMSC LAN8700",
214
215	.features	= PHY_BASIC_FEATURES,
 
216	.flags		= PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
217
218	.probe		= smsc_phy_probe,
219
220	/* basic functions */
221	.config_aneg	= genphy_config_aneg,
222	.read_status	= lan87xx_read_status,
223	.config_init	= smsc_phy_config_init,
224	.soft_reset	= smsc_phy_reset,
225
226	/* IRQ related */
227	.ack_interrupt	= smsc_phy_ack_interrupt,
228	.config_intr	= smsc_phy_config_intr,
229
230	.suspend	= genphy_suspend,
231	.resume		= genphy_resume,
232}, {
 
 
 
 
233	.phy_id		= 0x0007c0d0, /* OUI=0x00800f, Model#=0x0d */
234	.phy_id_mask	= 0xfffffff0,
235	.name		= "SMSC LAN911x Internal PHY",
236
237	.features	= PHY_BASIC_FEATURES,
 
238	.flags		= PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
239
240	.probe		= smsc_phy_probe,
241
242	/* basic functions */
243	.config_aneg	= genphy_config_aneg,
244	.read_status	= genphy_read_status,
245	.config_init	= lan911x_config_init,
246
247	/* IRQ related */
248	.ack_interrupt	= smsc_phy_ack_interrupt,
249	.config_intr	= smsc_phy_config_intr,
250
251	.suspend	= genphy_suspend,
252	.resume		= genphy_resume,
253}, {
 
 
 
 
254	.phy_id		= 0x0007c0f0, /* OUI=0x00800f, Model#=0x0f */
255	.phy_id_mask	= 0xfffffff0,
256	.name		= "SMSC LAN8710/LAN8720",
257
258	.features	= PHY_BASIC_FEATURES,
 
259	.flags		= PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
260
261	.probe		= smsc_phy_probe,
262
263	/* basic functions */
264	.config_aneg	= genphy_config_aneg,
265	.read_status	= lan87xx_read_status,
266	.config_init	= smsc_phy_config_init,
267	.soft_reset	= smsc_phy_reset,
268
269	/* IRQ related */
270	.ack_interrupt	= smsc_phy_ack_interrupt,
271	.config_intr	= smsc_phy_config_intr,
272
273	.suspend	= genphy_suspend,
274	.resume		= genphy_resume,
275}, {
276	.phy_id		= 0x0007c110,
277	.phy_id_mask	= 0xfffffff0,
278	.name		= "SMSC LAN8740",
279
280	.features	= PHY_BASIC_FEATURES,
281	.flags		= PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
 
 
 
 
 
 
 
 
 
 
 
 
282
283	.probe		= smsc_phy_probe,
 
 
284
285	/* basic functions */
286	.config_aneg	= genphy_config_aneg,
287	.read_status	= lan87xx_read_status,
288	.config_init	= smsc_phy_config_init,
289	.soft_reset	= smsc_phy_reset,
290
291	/* IRQ related */
292	.ack_interrupt	= smsc_phy_ack_interrupt,
293	.config_intr	= smsc_phy_config_intr,
294
295	.suspend	= genphy_suspend,
296	.resume		= genphy_resume,
297} };
298
299module_phy_driver(smsc_phy_driver);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
300
301MODULE_DESCRIPTION("SMSC PHY driver");
302MODULE_AUTHOR("Herbert Valerio Riedel");
303MODULE_LICENSE("GPL");
304
 
 
 
305static struct mdio_device_id __maybe_unused smsc_tbl[] = {
306	{ 0x0007c0a0, 0xfffffff0 },
307	{ 0x0007c0b0, 0xfffffff0 },
308	{ 0x0007c0c0, 0xfffffff0 },
309	{ 0x0007c0d0, 0xfffffff0 },
310	{ 0x0007c0f0, 0xfffffff0 },
311	{ 0x0007c110, 0xfffffff0 },
312	{ }
313};
314
315MODULE_DEVICE_TABLE(mdio, smsc_tbl);